[PATCH v3 00/27] [PATCH v3 00/27] native support for nftables in virtual network driver
V2: https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/thread/5RTZ6... This patch series enables libvirt to use nftables rules rather than iptables *when setting up virtual networks* (it does *not* add nftables support to the nwfilter driver). I've added the Reviewed-by's from Daniel where given in V2 (as long as I haven't made any non-trivial changes). That includes patches 1-9, 11-13, 16, 20, and 22. Changes from V2 - mainly I've addressed the issues that Dan pointed out in his reviews (details in each patch). Functionally the main changes are: 1) You can now choose whether iptables or nftables should be the default backend with the new meson option "firewall_backend" (which is set to "nftables" by default). 2) rpm spec now requires iptables or nftables (rather than recommending both) 3) The <firewall> element in the network status XML now has a "name='fwRemoval'" attribute, just in case we ever add another <firewall> element to keep track of all the commands that were run to create the firewall as well as the commands needed to remove it. 4) Failure to find the binary needed for any firewall backend now results in an error log and termination of the daemon. Laine Stump (27): util/network: move viriptables.[ch] from util to network directory network: move all functions manipulating iptables rules into network_iptables.c network: make all iptables functions used only in network_iptables.c static util: #define the names used for private packet filter chains util: change name of virFirewallRule to virFirewallCmd util: rename virNetFilterAction to iptablesAction, and add VIR_ENUM_DECL/IMPL util: check for 0 args when applying iptables rule util: add -w/--concurrent when applying a FirewallCmd rather than when building it util: determine ignoreErrors value when creating virFirewallCmd, not when applying util/network: new virFirewallBackend enum network: add (empty) network.conf file to distribution files network: support setting firewallBackend from network.conf network: framework to call backend-specific function to init private filter chains util: new functions to support adding individual firewall rollback commands util: implement rollback rule autocreation for iptables commands network: turn on auto-rollback for the rules added for virtual networks util: add name attribute to virFirewall util: new function virFirewallNewFromRollback() util: new functions virFirewallParseXML() and virFirewallFormat() conf: add a virFirewall object to virNetworkObj network: use previously saved list of firewall removal commands network: save network status when firewall rules are reloaded meson: stop looking for iptables/ip6tables/ebtables at build time network: add an nftables backend for network driver's firewall construction tests: test cases for nftables backend network: prefer the nftables backend over iptables spec: require either iptables or nftables if network driver is installed libvirt.spec.in | 7 +- meson.build | 10 +- meson_options.txt | 1 + po/POTFILES | 3 +- src/conf/virnetworkobj.c | 47 + src/conf/virnetworkobj.h | 11 + src/libvirt_private.syms | 59 +- src/network/bridge_driver.c | 35 +- src/network/bridge_driver_conf.c | 64 + src/network/bridge_driver_conf.h | 3 + src/network/bridge_driver_linux.c | 630 +------ src/network/bridge_driver_nop.c | 6 +- src/network/bridge_driver_platform.h | 6 +- src/network/libvirtd_network.aug | 39 + src/network/meson.build | 36 + src/network/network.conf.in | 28 + src/network/network_iptables.c | 1677 +++++++++++++++++ src/network/network_iptables.h | 30 + src/network/network_nftables.c | 940 +++++++++ src/network/network_nftables.h | 28 + src/network/test_libvirtd_network.aug.in | 5 + src/nwfilter/nwfilter_ebiptables_driver.c | 1004 +++++----- src/util/meson.build | 1 - src/util/virebtables.c | 36 +- src/util/virfirewall.c | 820 ++++++-- src/util/virfirewall.h | 87 +- src/util/viriptables.c | 1072 ----------- src/util/viriptables.h | 155 -- .../{base.args => base.iptables} | 0 tests/networkxml2firewalldata/base.nftables | 256 +++ ...-linux.args => nat-default-linux.iptables} | 0 .../nat-default-linux.nftables | 248 +++ ...pv6-linux.args => nat-ipv6-linux.iptables} | 0 .../nat-ipv6-linux.nftables | 384 ++++ ...rgs => nat-ipv6-masquerade-linux.iptables} | 0 .../nat-ipv6-masquerade-linux.nftables | 456 +++++ ...linux.args => nat-many-ips-linux.iptables} | 0 .../nat-many-ips-linux.nftables | 472 +++++ ...-linux.args => nat-no-dhcp-linux.iptables} | 0 .../nat-no-dhcp-linux.nftables | 384 ++++ ...ftp-linux.args => nat-tftp-linux.iptables} | 0 .../nat-tftp-linux.nftables | 274 +++ ...inux.args => route-default-linux.iptables} | 0 .../route-default-linux.nftables | 162 ++ tests/networkxml2firewalltest.c | 56 +- tests/virfirewalltest.c | 424 ++--- 46 files changed, 7205 insertions(+), 2751 deletions(-) create mode 100644 src/network/libvirtd_network.aug create mode 100644 src/network/network.conf.in create mode 100644 src/network/network_iptables.c create mode 100644 src/network/network_iptables.h create mode 100644 src/network/network_nftables.c create mode 100644 src/network/network_nftables.h create mode 100644 src/network/test_libvirtd_network.aug.in delete mode 100644 src/util/viriptables.c delete mode 100644 src/util/viriptables.h rename tests/networkxml2firewalldata/{base.args => base.iptables} (100%) create mode 100644 tests/networkxml2firewalldata/base.nftables rename tests/networkxml2firewalldata/{nat-default-linux.args => nat-default-linux.iptables} (100%) create mode 100644 tests/networkxml2firewalldata/nat-default-linux.nftables rename tests/networkxml2firewalldata/{nat-ipv6-linux.args => nat-ipv6-linux.iptables} (100%) create mode 100644 tests/networkxml2firewalldata/nat-ipv6-linux.nftables rename tests/networkxml2firewalldata/{nat-ipv6-masquerade-linux.args => nat-ipv6-masquerade-linux.iptables} (100%) create mode 100644 tests/networkxml2firewalldata/nat-ipv6-masquerade-linux.nftables rename tests/networkxml2firewalldata/{nat-many-ips-linux.args => nat-many-ips-linux.iptables} (100%) create mode 100644 tests/networkxml2firewalldata/nat-many-ips-linux.nftables rename tests/networkxml2firewalldata/{nat-no-dhcp-linux.args => nat-no-dhcp-linux.iptables} (100%) create mode 100644 tests/networkxml2firewalldata/nat-no-dhcp-linux.nftables rename tests/networkxml2firewalldata/{nat-tftp-linux.args => nat-tftp-linux.iptables} (100%) create mode 100644 tests/networkxml2firewalldata/nat-tftp-linux.nftables rename tests/networkxml2firewalldata/{route-default-linux.args => route-default-linux.iptables} (100%) create mode 100644 tests/networkxml2firewalldata/route-default-linux.nftables -- 2.44.0
These functions are only ever used by the network driver, and are so specific to the network driver's usage of iptables that they likely won't ever be used elsewhere. The files are renamed to network_iptables.[ch] to be more in line with driver-specific file naming conventions. Signed-off-by: Laine Stump <laine@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> --- Change from V2: * remove unneded #include "virenum.h" po/POTFILES | 2 +- src/libvirt_private.syms | 31 ------------------- src/network/bridge_driver_linux.c | 2 +- src/network/meson.build | 1 + .../network_iptables.c} | 6 ++-- .../network_iptables.h} | 2 +- src/util/meson.build | 1 - 7 files changed, 7 insertions(+), 38 deletions(-) rename src/{util/viriptables.c => network/network_iptables.c} (99%) rename src/{util/viriptables.h => network/network_iptables.h} (99%) diff --git a/po/POTFILES b/po/POTFILES index 6fbff4bef2..8b89fcf832 100644 --- a/po/POTFILES +++ b/po/POTFILES @@ -144,6 +144,7 @@ src/network/bridge_driver.c src/network/bridge_driver_conf.c src/network/bridge_driver_linux.c src/network/leaseshelper.c +src/network/network_iptables.c src/node_device/node_device_driver.c src/node_device/node_device_udev.c src/nwfilter/nwfilter_dhcpsnoop.c @@ -288,7 +289,6 @@ src/util/virhostmem.c src/util/virhostuptime.c src/util/viridentity.c src/util/virinitctl.c -src/util/viriptables.c src/util/viriscsi.c src/util/virjson.c src/util/virlease.c diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 3186dd6d23..5925c53091 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -2574,37 +2574,6 @@ virIdentitySetX509DName; virInitctlFifos; virInitctlSetRunLevel; - -# util/viriptables.h -iptablesAddDontMasquerade; -iptablesAddForwardAllowCross; -iptablesAddForwardAllowIn; -iptablesAddForwardAllowOut; -iptablesAddForwardAllowRelatedIn; -iptablesAddForwardMasquerade; -iptablesAddForwardRejectIn; -iptablesAddForwardRejectOut; -iptablesAddOutputFixUdpChecksum; -iptablesAddTcpInput; -iptablesAddTcpOutput; -iptablesAddUdpInput; -iptablesAddUdpOutput; -iptablesRemoveDontMasquerade; -iptablesRemoveForwardAllowCross; -iptablesRemoveForwardAllowIn; -iptablesRemoveForwardAllowOut; -iptablesRemoveForwardAllowRelatedIn; -iptablesRemoveForwardMasquerade; -iptablesRemoveForwardRejectIn; -iptablesRemoveForwardRejectOut; -iptablesRemoveOutputFixUdpChecksum; -iptablesRemoveTcpInput; -iptablesRemoveTcpOutput; -iptablesRemoveUdpInput; -iptablesRemoveUdpOutput; -iptablesSetupPrivateChains; - - # util/viriscsi.h virISCSIConnectionLogin; virISCSIConnectionLogout; diff --git a/src/network/bridge_driver_linux.c b/src/network/bridge_driver_linux.c index b8893bfed2..fd4bf7b61c 100644 --- a/src/network/bridge_driver_linux.c +++ b/src/network/bridge_driver_linux.c @@ -22,11 +22,11 @@ #include <config.h> #include "virfile.h" -#include "viriptables.h" #include "virstring.h" #include "virlog.h" #include "virfirewall.h" #include "virfirewalld.h" +#include "network_iptables.h" #define VIR_FROM_THIS VIR_FROM_NONE diff --git a/src/network/meson.build b/src/network/meson.build index eb171ae779..305e2d52fb 100644 --- a/src/network/meson.build +++ b/src/network/meson.build @@ -2,6 +2,7 @@ network_driver_sources = [ 'bridge_driver.c', 'bridge_driver_conf.c', 'bridge_driver_platform.c', + 'network_iptables.c', ] driver_source_files += files(network_driver_sources) diff --git a/src/util/viriptables.c b/src/network/network_iptables.c similarity index 99% rename from src/util/viriptables.c rename to src/network/network_iptables.c index 018021bc1b..362c0202a0 100644 --- a/src/util/viriptables.c +++ b/src/network/network_iptables.c @@ -1,5 +1,5 @@ /* - * viriptables.c: helper APIs for managing iptables + * network_iptables.c: helper APIs for managing iptables in network driver * * Copyright (C) 2007-2014 Red Hat, Inc. * @@ -27,13 +27,13 @@ #include <sys/stat.h> #include "internal.h" -#include "viriptables.h" #include "virfirewalld.h" #include "virerror.h" #include "virlog.h" #include "virhash.h" +#include "network_iptables.h" -VIR_LOG_INIT("util.iptables"); +VIR_LOG_INIT("network.iptables"); #define VIR_FROM_THIS VIR_FROM_NONE diff --git a/src/util/viriptables.h b/src/network/network_iptables.h similarity index 99% rename from src/util/viriptables.h rename to src/network/network_iptables.h index bb13f3292d..bfb6bbe0e7 100644 --- a/src/util/viriptables.h +++ b/src/network/network_iptables.h @@ -1,5 +1,5 @@ /* - * viriptables.h: helper APIs for managing iptables + * network_iptables.h: helper APIs for managing iptables in network driver * * Copyright (C) 2007, 2008 Red Hat, Inc. * diff --git a/src/util/meson.build b/src/util/meson.build index c2175f1098..896c795150 100644 --- a/src/util/meson.build +++ b/src/util/meson.build @@ -46,7 +46,6 @@ util_sources = [ 'virhostuptime.c', 'viridentity.c', 'virinitctl.c', - 'viriptables.c', 'viriscsi.c', 'virjson.c', 'virkeycode.c', -- 2.44.0
Although initially we will add exactly the same rules for the nftables backend, the two may (hopefully) soon diverge as we take advantage of nftables features that weren't available in iptables. When we do that, there will need to be a different version of these functions (currently in bridge_driver_linux.c) for each backend: networkAddFirewallRules() networkRemoveFirewallRules() networkSetupPrivateChains() Although it will mean duplicating some amount of code (with just the function names changed) for the nftables backend, this patch moves all of the rule-related code in the above three functions into iptables*() functions in network_iptables.c, and changes the functions in bridge_driver_linux.c to call the iptables*() functions. When we make a different backend, it will only need to make equivalents of those 3 functions publicly available to the upper layer. Signed-off-by: Laine Stump <laine@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> --- src/network/bridge_driver_linux.c | 556 +---------------------------- src/network/network_iptables.c | 562 +++++++++++++++++++++++++++++- src/network/network_iptables.h | 7 +- 3 files changed, 574 insertions(+), 551 deletions(-) diff --git a/src/network/bridge_driver_linux.c b/src/network/bridge_driver_linux.c index fd4bf7b61c..4914d5c903 100644 --- a/src/network/bridge_driver_linux.c +++ b/src/network/bridge_driver_linux.c @@ -301,512 +301,10 @@ int networkCheckRouteCollision(virNetworkDef *def) return 0; } -static const char networkLocalMulticastIPv4[] = "224.0.0.0/24"; -static const char networkLocalMulticastIPv6[] = "ff02::/16"; -static const char networkLocalBroadcast[] = "255.255.255.255/32"; -static int -networkAddMasqueradingFirewallRules(virFirewall *fw, - virNetworkDef *def, - virNetworkIPDef *ipdef) -{ - int prefix = virNetworkIPDefPrefix(ipdef); - const char *forwardIf = virNetworkDefForwardIf(def, 0); - bool isIPv4 = VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET); - - if (prefix < 0) { - virReportError(VIR_ERR_INTERNAL_ERROR, - _("Invalid prefix or netmask for '%1$s'"), - def->bridge); - return -1; - } - - /* allow forwarding packets from the bridge interface */ - if (iptablesAddForwardAllowOut(fw, - &ipdef->address, - prefix, - def->bridge, - forwardIf) < 0) - return -1; - - /* allow forwarding packets to the bridge interface if they are - * part of an existing connection - */ - if (iptablesAddForwardAllowRelatedIn(fw, - &ipdef->address, - prefix, - def->bridge, - forwardIf) < 0) - return -1; - - /* - * Enable masquerading. - * - * We need to end up with 5 rules in the table in this order - * - * 1. do not masquerade packets targeting 224.0.0.0/24 - * 2. do not masquerade packets targeting 255.255.255.255/32 - * 3. masquerade protocol=tcp with sport mapping restriction - * 4. masquerade protocol=udp with sport mapping restriction - * 5. generic, masquerade any protocol - * - * 224.0.0.0/24 is the local network multicast range. Packets are not - * forwarded outside. - * - * 255.255.255.255/32 is the broadcast address of any local network. Again, - * such packets are never forwarded, but strict DHCP clients don't accept - * DHCP replies with changed source ports. - * - * The sport mappings are required, because default IPtables - * MASQUERADE maintain port numbers unchanged where possible. - * - * NFS can be configured to only "trust" port numbers < 1023. - * - * Guests using NAT thus need to be prevented from having port - * numbers < 1023, otherwise they can bypass the NFS "security" - * check on the source port number. - * - * Since we use '--insert' to add rules to the header of the - * chain, we actually need to add them in the reverse of the - * order just mentioned ! - */ - - /* First the generic masquerade rule for other protocols */ - if (iptablesAddForwardMasquerade(fw, - &ipdef->address, - prefix, - forwardIf, - &def->forward.addr, - &def->forward.port, - NULL) < 0) - return -1; - - /* UDP with a source port restriction */ - if (iptablesAddForwardMasquerade(fw, - &ipdef->address, - prefix, - forwardIf, - &def->forward.addr, - &def->forward.port, - "udp") < 0) - return -1; - - /* TCP with a source port restriction */ - if (iptablesAddForwardMasquerade(fw, - &ipdef->address, - prefix, - forwardIf, - &def->forward.addr, - &def->forward.port, - "tcp") < 0) - return -1; - - /* exempt local network broadcast address as destination */ - if (isIPv4 && - iptablesAddDontMasquerade(fw, - &ipdef->address, - prefix, - forwardIf, - networkLocalBroadcast) < 0) - return -1; - - /* exempt local multicast range as destination */ - if (iptablesAddDontMasquerade(fw, - &ipdef->address, - prefix, - forwardIf, - isIPv4 ? networkLocalMulticastIPv4 : - networkLocalMulticastIPv6) < 0) - return -1; - - return 0; -} - -static int -networkRemoveMasqueradingFirewallRules(virFirewall *fw, - virNetworkDef *def, - virNetworkIPDef *ipdef) -{ - int prefix = virNetworkIPDefPrefix(ipdef); - const char *forwardIf = virNetworkDefForwardIf(def, 0); - bool isIPv4 = VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET); - - if (prefix < 0) - return 0; - - if (iptablesRemoveDontMasquerade(fw, - &ipdef->address, - prefix, - forwardIf, - isIPv4 ? networkLocalMulticastIPv4 : - networkLocalMulticastIPv6) < 0) - return -1; - - if (isIPv4 && - iptablesRemoveDontMasquerade(fw, - &ipdef->address, - prefix, - forwardIf, - networkLocalBroadcast) < 0) - return -1; - - if (iptablesRemoveForwardMasquerade(fw, - &ipdef->address, - prefix, - forwardIf, - &def->forward.addr, - &def->forward.port, - "tcp") < 0) - return -1; - - if (iptablesRemoveForwardMasquerade(fw, - &ipdef->address, - prefix, - forwardIf, - &def->forward.addr, - &def->forward.port, - "udp") < 0) - return -1; - - if (iptablesRemoveForwardMasquerade(fw, - &ipdef->address, - prefix, - forwardIf, - &def->forward.addr, - &def->forward.port, - NULL) < 0) - return -1; - - if (iptablesRemoveForwardAllowRelatedIn(fw, - &ipdef->address, - prefix, - def->bridge, - forwardIf) < 0) - return -1; - - if (iptablesRemoveForwardAllowOut(fw, - &ipdef->address, - prefix, - def->bridge, - forwardIf) < 0) - return -1; - - return 0; -} - - -static int -networkAddRoutingFirewallRules(virFirewall *fw, - virNetworkDef *def, - virNetworkIPDef *ipdef) -{ - int prefix = virNetworkIPDefPrefix(ipdef); - const char *forwardIf = virNetworkDefForwardIf(def, 0); - - if (prefix < 0) { - virReportError(VIR_ERR_INTERNAL_ERROR, - _("Invalid prefix or netmask for '%1$s'"), - def->bridge); - return -1; - } - - /* allow routing packets from the bridge interface */ - if (iptablesAddForwardAllowOut(fw, - &ipdef->address, - prefix, - def->bridge, - forwardIf) < 0) - return -1; - - /* allow routing packets to the bridge interface */ - if (iptablesAddForwardAllowIn(fw, - &ipdef->address, - prefix, - def->bridge, - forwardIf) < 0) - return -1; - - return 0; -} - - -static int -networkRemoveRoutingFirewallRules(virFirewall *fw, - virNetworkDef *def, - virNetworkIPDef *ipdef) -{ - int prefix = virNetworkIPDefPrefix(ipdef); - const char *forwardIf = virNetworkDefForwardIf(def, 0); - - if (prefix < 0) - return 0; - - if (iptablesRemoveForwardAllowIn(fw, - &ipdef->address, - prefix, - def->bridge, - forwardIf) < 0) - return -1; - - if (iptablesRemoveForwardAllowOut(fw, - &ipdef->address, - prefix, - def->bridge, - forwardIf) < 0) - return -1; - - return 0; -} - - -static void -networkAddGeneralIPv4FirewallRules(virFirewall *fw, - virNetworkDef *def) -{ - size_t i; - virNetworkIPDef *ipv4def; - - /* First look for first IPv4 address that has dhcp or tftpboot defined. */ - /* We support dhcp config on 1 IPv4 interface only. */ - for (i = 0; - (ipv4def = virNetworkDefGetIPByIndex(def, AF_INET, i)); - i++) { - if (ipv4def->nranges || ipv4def->nhosts || ipv4def->tftproot) - break; - } - - /* allow DHCP requests through to dnsmasq & back out */ - iptablesAddTcpInput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 67); - iptablesAddUdpInput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 67); - iptablesAddTcpOutput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 68); - iptablesAddUdpOutput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 68); - - /* allow DNS requests through to dnsmasq & back out */ - iptablesAddTcpInput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 53); - iptablesAddUdpInput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 53); - iptablesAddTcpOutput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 53); - iptablesAddUdpOutput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 53); - - /* allow TFTP requests through to dnsmasq if necessary & back out */ - if (ipv4def && ipv4def->tftproot) { - iptablesAddUdpInput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 69); - iptablesAddUdpOutput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 69); - } - - /* Catch all rules to block forwarding to/from bridges */ - iptablesAddForwardRejectOut(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge); - iptablesAddForwardRejectIn(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge); - - /* Allow traffic between guests on the same bridge */ - iptablesAddForwardAllowCross(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge); -} - -static void -networkRemoveGeneralIPv4FirewallRules(virFirewall *fw, - virNetworkDef *def) -{ - size_t i; - virNetworkIPDef *ipv4def; - - for (i = 0; - (ipv4def = virNetworkDefGetIPByIndex(def, AF_INET, i)); - i++) { - if (ipv4def->nranges || ipv4def->nhosts || ipv4def->tftproot) - break; - } - - iptablesRemoveForwardAllowCross(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge); - iptablesRemoveForwardRejectIn(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge); - iptablesRemoveForwardRejectOut(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge); - - if (ipv4def && ipv4def->tftproot) { - iptablesRemoveUdpInput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 69); - iptablesRemoveUdpOutput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 69); - } - - iptablesRemoveUdpInput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 53); - iptablesRemoveTcpInput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 53); - iptablesRemoveUdpOutput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 53); - iptablesRemoveTcpOutput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 53); - - iptablesRemoveUdpOutput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 68); - iptablesRemoveTcpOutput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 68); - iptablesRemoveUdpInput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 67); - iptablesRemoveTcpInput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 67); -} - - -/* Add all once/network rules required for IPv6. - * If no IPv6 addresses are defined and <network ipv6='yes'> is - * specified, then allow IPv6 communications between virtual systems. - * If any IPv6 addresses are defined, then add the rules for regular operation. - */ -static void -networkAddGeneralIPv6FirewallRules(virFirewall *fw, - virNetworkDef *def) -{ - if (!virNetworkDefGetIPByIndex(def, AF_INET6, 0) && - !def->ipv6nogw) { - return; - } - - /* Catch all rules to block forwarding to/from bridges */ - iptablesAddForwardRejectOut(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge); - iptablesAddForwardRejectIn(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge); - - /* Allow traffic between guests on the same bridge */ - iptablesAddForwardAllowCross(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge); - - if (virNetworkDefGetIPByIndex(def, AF_INET6, 0)) { - /* allow DNS over IPv6 & back out */ - iptablesAddTcpInput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 53); - iptablesAddUdpInput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 53); - iptablesAddTcpOutput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 53); - iptablesAddUdpOutput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 53); - /* allow DHCPv6 & back out */ - iptablesAddUdpInput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 547); - iptablesAddUdpOutput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 546); - } -} - -static void -networkRemoveGeneralIPv6FirewallRules(virFirewall *fw, - virNetworkDef *def) +int +networkAddFirewallRules(virNetworkDef *def) { - if (!virNetworkDefGetIPByIndex(def, AF_INET6, 0) && - !def->ipv6nogw) { - return; - } - - if (virNetworkDefGetIPByIndex(def, AF_INET6, 0)) { - iptablesRemoveUdpOutput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 546); - iptablesRemoveUdpInput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 547); - iptablesRemoveUdpOutput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 53); - iptablesRemoveTcpOutput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 53); - iptablesRemoveUdpInput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 53); - iptablesRemoveTcpInput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 53); - } - - /* the following rules are there if no IPv6 address has been defined - * but def->ipv6nogw == true - */ - iptablesRemoveForwardAllowCross(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge); - iptablesRemoveForwardRejectIn(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge); - iptablesRemoveForwardRejectOut(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge); -} - - -static void -networkAddGeneralFirewallRules(virFirewall *fw, - virNetworkDef *def) -{ - networkAddGeneralIPv4FirewallRules(fw, def); - networkAddGeneralIPv6FirewallRules(fw, def); -} - - -static void -networkRemoveGeneralFirewallRules(virFirewall *fw, - virNetworkDef *def) -{ - networkRemoveGeneralIPv4FirewallRules(fw, def); - networkRemoveGeneralIPv6FirewallRules(fw, def); -} - -static void -networkAddChecksumFirewallRules(virFirewall *fw, - virNetworkDef *def) -{ - size_t i; - virNetworkIPDef *ipv4def; - - /* First look for first IPv4 address that has dhcp or tftpboot defined. */ - /* We support dhcp config on 1 IPv4 interface only. */ - for (i = 0; - (ipv4def = virNetworkDefGetIPByIndex(def, AF_INET, i)); - i++) { - if (ipv4def->nranges || ipv4def->nhosts) - break; - } - - /* If we are doing local DHCP service on this network, attempt to - * add a rule that will fixup the checksum of DHCP response - * packets back to the guests (but report failure without - * aborting, since not all iptables implementations support it). - */ - if (ipv4def) - iptablesAddOutputFixUdpChecksum(fw, def->bridge, 68); -} - - -static void -networkRemoveChecksumFirewallRules(virFirewall *fw, - virNetworkDef *def) -{ - size_t i; - virNetworkIPDef *ipv4def; - - /* First look for first IPv4 address that has dhcp or tftpboot defined. */ - /* We support dhcp config on 1 IPv4 interface only. */ - for (i = 0; - (ipv4def = virNetworkDefGetIPByIndex(def, AF_INET, i)); - i++) { - if (ipv4def->nranges || ipv4def->nhosts) - break; - } - - if (ipv4def) - iptablesRemoveOutputFixUdpChecksum(fw, def->bridge, 68); -} - - -static int -networkAddIPSpecificFirewallRules(virFirewall *fw, - virNetworkDef *def, - virNetworkIPDef *ipdef) -{ - /* NB: in the case of IPv6, routing rules are added when the - * forward mode is NAT. This is because IPv6 has no NAT. - */ - - if (def->forward.type == VIR_NETWORK_FORWARD_NAT) { - if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET) || - def->forward.natIPv6 == VIR_TRISTATE_BOOL_YES) - return networkAddMasqueradingFirewallRules(fw, def, ipdef); - else if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET6)) - return networkAddRoutingFirewallRules(fw, def, ipdef); - } else if (def->forward.type == VIR_NETWORK_FORWARD_ROUTE) { - return networkAddRoutingFirewallRules(fw, def, ipdef); - } - return 0; -} - - -static int -networkRemoveIPSpecificFirewallRules(virFirewall *fw, - virNetworkDef *def, - virNetworkIPDef *ipdef) -{ - if (def->forward.type == VIR_NETWORK_FORWARD_NAT) { - if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET) || - def->forward.natIPv6 == VIR_TRISTATE_BOOL_YES) - return networkRemoveMasqueradingFirewallRules(fw, def, ipdef); - else if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET6)) - return networkRemoveRoutingFirewallRules(fw, def, ipdef); - } else if (def->forward.type == VIR_NETWORK_FORWARD_ROUTE) { - return networkRemoveRoutingFirewallRules(fw, def, ipdef); - } - return 0; -} - - -/* Add all rules for all ip addresses (and general rules) on a network */ -int networkAddFirewallRules(virNetworkDef *def) -{ - size_t i; - virNetworkIPDef *ipdef; - g_autoptr(virFirewall) fw = virFirewallNew(); - if (virOnce(&createdOnce, networkSetupPrivateChains) < 0) return -1; @@ -891,52 +389,12 @@ int networkAddFirewallRules(virNetworkDef *def) } } - virFirewallStartTransaction(fw, 0); - - networkAddGeneralFirewallRules(fw, def); - - for (i = 0; - (ipdef = virNetworkDefGetIPByIndex(def, AF_UNSPEC, i)); - i++) { - if (networkAddIPSpecificFirewallRules(fw, def, ipdef) < 0) - return -1; - } - - virFirewallStartRollback(fw, 0); - - for (i = 0; - (ipdef = virNetworkDefGetIPByIndex(def, AF_UNSPEC, i)); - i++) { - if (networkRemoveIPSpecificFirewallRules(fw, def, ipdef) < 0) - return -1; - } - networkRemoveGeneralFirewallRules(fw, def); - - virFirewallStartTransaction(fw, VIR_FIREWALL_TRANSACTION_IGNORE_ERRORS); - networkAddChecksumFirewallRules(fw, def); - - return virFirewallApply(fw); + return iptablesAddFirewallRules(def); } -/* Remove all rules for all ip addresses (and general rules) on a network */ -void networkRemoveFirewallRules(virNetworkDef *def) -{ - size_t i; - virNetworkIPDef *ipdef; - g_autoptr(virFirewall) fw = virFirewallNew(); - - virFirewallStartTransaction(fw, VIR_FIREWALL_TRANSACTION_IGNORE_ERRORS); - networkRemoveChecksumFirewallRules(fw, def); - - virFirewallStartTransaction(fw, VIR_FIREWALL_TRANSACTION_IGNORE_ERRORS); - for (i = 0; - (ipdef = virNetworkDefGetIPByIndex(def, AF_UNSPEC, i)); - i++) { - if (networkRemoveIPSpecificFirewallRules(fw, def, ipdef) < 0) - return; - } - networkRemoveGeneralFirewallRules(fw, def); - - virFirewallApply(fw); +void +networkRemoveFirewallRules(virNetworkDef *def) +{ + iptablesRemoveFirewallRules(def); } diff --git a/src/network/network_iptables.c b/src/network/network_iptables.c index 362c0202a0..7338237c21 100644 --- a/src/network/network_iptables.c +++ b/src/network/network_iptables.c @@ -1,5 +1,6 @@ /* - * network_iptables.c: helper APIs for managing iptables in network driver + * network_iptables.c: iptables-based firewall implementation for + * virtual networks. * * Copyright (C) 2007-2014 Red Hat, Inc. * @@ -1070,3 +1071,562 @@ iptablesRemoveOutputFixUdpChecksum(virFirewall *fw, { iptablesOutputFixUdpChecksum(fw, iface, port, VIR_NETFILTER_DELETE); } + + +static const char networkLocalMulticastIPv4[] = "224.0.0.0/24"; +static const char networkLocalMulticastIPv6[] = "ff02::/16"; +static const char networkLocalBroadcast[] = "255.255.255.255/32"; + +static int +iptablesAddMasqueradingFirewallRules(virFirewall *fw, + virNetworkDef *def, + virNetworkIPDef *ipdef) +{ + int prefix = virNetworkIPDefPrefix(ipdef); + const char *forwardIf = virNetworkDefForwardIf(def, 0); + bool isIPv4 = VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET); + + if (prefix < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, + _("Invalid prefix or netmask for '%1$s'"), + def->bridge); + return -1; + } + + /* allow forwarding packets from the bridge interface */ + if (iptablesAddForwardAllowOut(fw, + &ipdef->address, + prefix, + def->bridge, + forwardIf) < 0) + return -1; + + /* allow forwarding packets to the bridge interface if they are + * part of an existing connection + */ + if (iptablesAddForwardAllowRelatedIn(fw, + &ipdef->address, + prefix, + def->bridge, + forwardIf) < 0) + return -1; + + /* + * Enable masquerading. + * + * We need to end up with 5 rules in the table in this order + * + * 1. do not masquerade packets targeting 224.0.0.0/24 + * 2. do not masquerade packets targeting 255.255.255.255/32 + * 3. masquerade protocol=tcp with sport mapping restriction + * 4. masquerade protocol=udp with sport mapping restriction + * 5. generic, masquerade any protocol + * + * 224.0.0.0/24 is the local network multicast range. Packets are not + * forwarded outside. + * + * 255.255.255.255/32 is the broadcast address of any local network. Again, + * such packets are never forwarded, but strict DHCP clients don't accept + * DHCP replies with changed source ports. + * + * The sport mappings are required, because default IPtables + * MASQUERADE maintain port numbers unchanged where possible. + * + * NFS can be configured to only "trust" port numbers < 1023. + * + * Guests using NAT thus need to be prevented from having port + * numbers < 1023, otherwise they can bypass the NFS "security" + * check on the source port number. + * + * Since we use '--insert' to add rules to the header of the + * chain, we actually need to add them in the reverse of the + * order just mentioned ! + */ + + /* First the generic masquerade rule for other protocols */ + if (iptablesAddForwardMasquerade(fw, + &ipdef->address, + prefix, + forwardIf, + &def->forward.addr, + &def->forward.port, + NULL) < 0) + return -1; + + /* UDP with a source port restriction */ + if (iptablesAddForwardMasquerade(fw, + &ipdef->address, + prefix, + forwardIf, + &def->forward.addr, + &def->forward.port, + "udp") < 0) + return -1; + + /* TCP with a source port restriction */ + if (iptablesAddForwardMasquerade(fw, + &ipdef->address, + prefix, + forwardIf, + &def->forward.addr, + &def->forward.port, + "tcp") < 0) + return -1; + + /* exempt local network broadcast address as destination */ + if (isIPv4 && + iptablesAddDontMasquerade(fw, + &ipdef->address, + prefix, + forwardIf, + networkLocalBroadcast) < 0) + return -1; + + /* exempt local multicast range as destination */ + if (iptablesAddDontMasquerade(fw, + &ipdef->address, + prefix, + forwardIf, + isIPv4 ? networkLocalMulticastIPv4 : + networkLocalMulticastIPv6) < 0) + return -1; + + return 0; +} + +static int +iptablesRemoveMasqueradingFirewallRules(virFirewall *fw, + virNetworkDef *def, + virNetworkIPDef *ipdef) +{ + int prefix = virNetworkIPDefPrefix(ipdef); + const char *forwardIf = virNetworkDefForwardIf(def, 0); + bool isIPv4 = VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET); + + if (prefix < 0) + return 0; + + if (iptablesRemoveDontMasquerade(fw, + &ipdef->address, + prefix, + forwardIf, + isIPv4 ? networkLocalMulticastIPv4 : + networkLocalMulticastIPv6) < 0) + return -1; + + if (isIPv4 && + iptablesRemoveDontMasquerade(fw, + &ipdef->address, + prefix, + forwardIf, + networkLocalBroadcast) < 0) + return -1; + + if (iptablesRemoveForwardMasquerade(fw, + &ipdef->address, + prefix, + forwardIf, + &def->forward.addr, + &def->forward.port, + "tcp") < 0) + return -1; + + if (iptablesRemoveForwardMasquerade(fw, + &ipdef->address, + prefix, + forwardIf, + &def->forward.addr, + &def->forward.port, + "udp") < 0) + return -1; + + if (iptablesRemoveForwardMasquerade(fw, + &ipdef->address, + prefix, + forwardIf, + &def->forward.addr, + &def->forward.port, + NULL) < 0) + return -1; + + if (iptablesRemoveForwardAllowRelatedIn(fw, + &ipdef->address, + prefix, + def->bridge, + forwardIf) < 0) + return -1; + + if (iptablesRemoveForwardAllowOut(fw, + &ipdef->address, + prefix, + def->bridge, + forwardIf) < 0) + return -1; + + return 0; +} + + +static int +iptablesAddRoutingFirewallRules(virFirewall *fw, + virNetworkDef *def, + virNetworkIPDef *ipdef) +{ + int prefix = virNetworkIPDefPrefix(ipdef); + const char *forwardIf = virNetworkDefForwardIf(def, 0); + + if (prefix < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, + _("Invalid prefix or netmask for '%1$s'"), + def->bridge); + return -1; + } + + /* allow routing packets from the bridge interface */ + if (iptablesAddForwardAllowOut(fw, + &ipdef->address, + prefix, + def->bridge, + forwardIf) < 0) + return -1; + + /* allow routing packets to the bridge interface */ + if (iptablesAddForwardAllowIn(fw, + &ipdef->address, + prefix, + def->bridge, + forwardIf) < 0) + return -1; + + return 0; +} + + +static int +iptablesRemoveRoutingFirewallRules(virFirewall *fw, + virNetworkDef *def, + virNetworkIPDef *ipdef) +{ + int prefix = virNetworkIPDefPrefix(ipdef); + const char *forwardIf = virNetworkDefForwardIf(def, 0); + + if (prefix < 0) + return 0; + + if (iptablesRemoveForwardAllowIn(fw, + &ipdef->address, + prefix, + def->bridge, + forwardIf) < 0) + return -1; + + if (iptablesRemoveForwardAllowOut(fw, + &ipdef->address, + prefix, + def->bridge, + forwardIf) < 0) + return -1; + + return 0; +} + + +static void +iptablesAddGeneralIPv4FirewallRules(virFirewall *fw, + virNetworkDef *def) +{ + size_t i; + virNetworkIPDef *ipv4def; + + /* First look for first IPv4 address that has dhcp or tftpboot defined. */ + /* We support dhcp config on 1 IPv4 interface only. */ + for (i = 0; + (ipv4def = virNetworkDefGetIPByIndex(def, AF_INET, i)); + i++) { + if (ipv4def->nranges || ipv4def->nhosts || ipv4def->tftproot) + break; + } + + /* allow DHCP requests through to dnsmasq & back out */ + iptablesAddTcpInput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 67); + iptablesAddUdpInput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 67); + iptablesAddTcpOutput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 68); + iptablesAddUdpOutput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 68); + + /* allow DNS requests through to dnsmasq & back out */ + iptablesAddTcpInput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 53); + iptablesAddUdpInput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 53); + iptablesAddTcpOutput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 53); + iptablesAddUdpOutput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 53); + + /* allow TFTP requests through to dnsmasq if necessary & back out */ + if (ipv4def && ipv4def->tftproot) { + iptablesAddUdpInput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 69); + iptablesAddUdpOutput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 69); + } + + /* Catch all rules to block forwarding to/from bridges */ + iptablesAddForwardRejectOut(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge); + iptablesAddForwardRejectIn(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge); + + /* Allow traffic between guests on the same bridge */ + iptablesAddForwardAllowCross(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge); +} + +static void +iptablesRemoveGeneralIPv4FirewallRules(virFirewall *fw, + virNetworkDef *def) +{ + size_t i; + virNetworkIPDef *ipv4def; + + for (i = 0; + (ipv4def = virNetworkDefGetIPByIndex(def, AF_INET, i)); + i++) { + if (ipv4def->nranges || ipv4def->nhosts || ipv4def->tftproot) + break; + } + + iptablesRemoveForwardAllowCross(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge); + iptablesRemoveForwardRejectIn(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge); + iptablesRemoveForwardRejectOut(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge); + + if (ipv4def && ipv4def->tftproot) { + iptablesRemoveUdpInput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 69); + iptablesRemoveUdpOutput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 69); + } + + iptablesRemoveUdpInput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 53); + iptablesRemoveTcpInput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 53); + iptablesRemoveUdpOutput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 53); + iptablesRemoveTcpOutput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 53); + + iptablesRemoveUdpOutput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 68); + iptablesRemoveTcpOutput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 68); + iptablesRemoveUdpInput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 67); + iptablesRemoveTcpInput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 67); +} + + +/* Add all once/network rules required for IPv6. + * If no IPv6 addresses are defined and <network ipv6='yes'> is + * specified, then allow IPv6 communications between virtual systems. + * If any IPv6 addresses are defined, then add the rules for regular operation. + */ +static void +iptablesAddGeneralIPv6FirewallRules(virFirewall *fw, + virNetworkDef *def) +{ + if (!virNetworkDefGetIPByIndex(def, AF_INET6, 0) && + !def->ipv6nogw) { + return; + } + + /* Catch all rules to block forwarding to/from bridges */ + iptablesAddForwardRejectOut(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge); + iptablesAddForwardRejectIn(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge); + + /* Allow traffic between guests on the same bridge */ + iptablesAddForwardAllowCross(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge); + + if (virNetworkDefGetIPByIndex(def, AF_INET6, 0)) { + /* allow DNS over IPv6 & back out */ + iptablesAddTcpInput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 53); + iptablesAddUdpInput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 53); + iptablesAddTcpOutput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 53); + iptablesAddUdpOutput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 53); + /* allow DHCPv6 & back out */ + iptablesAddUdpInput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 547); + iptablesAddUdpOutput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 546); + } +} + +static void +iptablesRemoveGeneralIPv6FirewallRules(virFirewall *fw, + virNetworkDef *def) +{ + if (!virNetworkDefGetIPByIndex(def, AF_INET6, 0) && + !def->ipv6nogw) { + return; + } + + if (virNetworkDefGetIPByIndex(def, AF_INET6, 0)) { + iptablesRemoveUdpOutput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 546); + iptablesRemoveUdpInput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 547); + iptablesRemoveUdpOutput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 53); + iptablesRemoveTcpOutput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 53); + iptablesRemoveUdpInput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 53); + iptablesRemoveTcpInput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 53); + } + + /* the following rules are there if no IPv6 address has been defined + * but def->ipv6nogw == true + */ + iptablesRemoveForwardAllowCross(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge); + iptablesRemoveForwardRejectIn(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge); + iptablesRemoveForwardRejectOut(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge); +} + + +static void +iptablesAddGeneralFirewallRules(virFirewall *fw, + virNetworkDef *def) +{ + iptablesAddGeneralIPv4FirewallRules(fw, def); + iptablesAddGeneralIPv6FirewallRules(fw, def); +} + + +static void +iptablesRemoveGeneralFirewallRules(virFirewall *fw, + virNetworkDef *def) +{ + iptablesRemoveGeneralIPv4FirewallRules(fw, def); + iptablesRemoveGeneralIPv6FirewallRules(fw, def); +} + +static void +iptablesAddChecksumFirewallRules(virFirewall *fw, + virNetworkDef *def) +{ + size_t i; + virNetworkIPDef *ipv4def; + + /* First look for first IPv4 address that has dhcp or tftpboot defined. */ + /* We support dhcp config on 1 IPv4 interface only. */ + for (i = 0; + (ipv4def = virNetworkDefGetIPByIndex(def, AF_INET, i)); + i++) { + if (ipv4def->nranges || ipv4def->nhosts) + break; + } + + /* If we are doing local DHCP service on this network, attempt to + * add a rule that will fixup the checksum of DHCP response + * packets back to the guests (but report failure without + * aborting, since not all iptables implementations support it). + */ + if (ipv4def) + iptablesAddOutputFixUdpChecksum(fw, def->bridge, 68); +} + + +static void +iptablesRemoveChecksumFirewallRules(virFirewall *fw, + virNetworkDef *def) +{ + size_t i; + virNetworkIPDef *ipv4def; + + /* First look for first IPv4 address that has dhcp or tftpboot defined. */ + /* We support dhcp config on 1 IPv4 interface only. */ + for (i = 0; + (ipv4def = virNetworkDefGetIPByIndex(def, AF_INET, i)); + i++) { + if (ipv4def->nranges || ipv4def->nhosts) + break; + } + + if (ipv4def) + iptablesRemoveOutputFixUdpChecksum(fw, def->bridge, 68); +} + + +static int +iptablesAddIPSpecificFirewallRules(virFirewall *fw, + virNetworkDef *def, + virNetworkIPDef *ipdef) +{ + /* NB: in the case of IPv6, routing rules are added when the + * forward mode is NAT. This is because IPv6 has no NAT. + */ + + if (def->forward.type == VIR_NETWORK_FORWARD_NAT) { + if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET) || + def->forward.natIPv6 == VIR_TRISTATE_BOOL_YES) + return iptablesAddMasqueradingFirewallRules(fw, def, ipdef); + else if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET6)) + return iptablesAddRoutingFirewallRules(fw, def, ipdef); + } else if (def->forward.type == VIR_NETWORK_FORWARD_ROUTE) { + return iptablesAddRoutingFirewallRules(fw, def, ipdef); + } + return 0; +} + + +static int +iptablesRemoveIPSpecificFirewallRules(virFirewall *fw, + virNetworkDef *def, + virNetworkIPDef *ipdef) +{ + if (def->forward.type == VIR_NETWORK_FORWARD_NAT) { + if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET) || + def->forward.natIPv6 == VIR_TRISTATE_BOOL_YES) + return iptablesRemoveMasqueradingFirewallRules(fw, def, ipdef); + else if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET6)) + return iptablesRemoveRoutingFirewallRules(fw, def, ipdef); + } else if (def->forward.type == VIR_NETWORK_FORWARD_ROUTE) { + return iptablesRemoveRoutingFirewallRules(fw, def, ipdef); + } + return 0; +} + + +/* Add all rules for all ip addresses (and general rules) on a network */ +int +iptablesAddFirewallRules(virNetworkDef *def) +{ + size_t i; + virNetworkIPDef *ipdef; + g_autoptr(virFirewall) fw = virFirewallNew(); + + virFirewallStartTransaction(fw, 0); + + iptablesAddGeneralFirewallRules(fw, def); + + for (i = 0; + (ipdef = virNetworkDefGetIPByIndex(def, AF_UNSPEC, i)); + i++) { + if (iptablesAddIPSpecificFirewallRules(fw, def, ipdef) < 0) + return -1; + } + + virFirewallStartRollback(fw, 0); + + for (i = 0; + (ipdef = virNetworkDefGetIPByIndex(def, AF_UNSPEC, i)); + i++) { + if (iptablesRemoveIPSpecificFirewallRules(fw, def, ipdef) < 0) + return -1; + } + iptablesRemoveGeneralFirewallRules(fw, def); + + virFirewallStartTransaction(fw, VIR_FIREWALL_TRANSACTION_IGNORE_ERRORS); + iptablesAddChecksumFirewallRules(fw, def); + + return virFirewallApply(fw); +} + +/* Remove all rules for all ip addresses (and general rules) on a network */ +void +iptablesRemoveFirewallRules(virNetworkDef *def) +{ + size_t i; + virNetworkIPDef *ipdef; + g_autoptr(virFirewall) fw = virFirewallNew(); + + virFirewallStartTransaction(fw, VIR_FIREWALL_TRANSACTION_IGNORE_ERRORS); + iptablesRemoveChecksumFirewallRules(fw, def); + + virFirewallStartTransaction(fw, VIR_FIREWALL_TRANSACTION_IGNORE_ERRORS); + + for (i = 0; + (ipdef = virNetworkDefGetIPByIndex(def, AF_UNSPEC, i)); + i++) { + if (iptablesRemoveIPSpecificFirewallRules(fw, def, ipdef) < 0) + return; + } + iptablesRemoveGeneralFirewallRules(fw, def); + + virFirewallApply(fw); +} diff --git a/src/network/network_iptables.h b/src/network/network_iptables.h index bfb6bbe0e7..d3f6b48437 100644 --- a/src/network/network_iptables.h +++ b/src/network/network_iptables.h @@ -22,8 +22,13 @@ #include "virsocketaddr.h" #include "virfirewall.h" +#include "network_conf.h" -int iptablesSetupPrivateChains (virFirewallLayer layer); +int iptablesAddFirewallRules(virNetworkDef *def); + +void iptablesRemoveFirewallRules(virNetworkDef *def); + +int iptablesSetupPrivateChains(virFirewallLayer layer); void iptablesAddTcpInput (virFirewall *fw, virFirewallLayer layer, -- 2.44.0
Now that the toplevel iptables functions have been moved out of the linux bridge driver into network_iptables.c, all of the utility functions are used only within that same file, so simplify it. Signed-off-by: Laine Stump <laine@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> --- src/network/network_iptables.c | 52 ++++++------- src/network/network_iptables.h | 130 --------------------------------- 2 files changed, 26 insertions(+), 156 deletions(-) diff --git a/src/network/network_iptables.c b/src/network/network_iptables.c index 7338237c21..697ad5d8d6 100644 --- a/src/network/network_iptables.c +++ b/src/network/network_iptables.c @@ -207,7 +207,7 @@ iptablesOutput(virFirewall *fw, * Add an input to the IP table allowing access to the given @port on * the given @iface interface for TCP packets */ -void +static void iptablesAddTcpInput(virFirewall *fw, virFirewallLayer layer, const char *iface, @@ -225,7 +225,7 @@ iptablesAddTcpInput(virFirewall *fw, * Removes an input from the IP table, hence forbidding access to the given * @port on the given @iface interface for TCP packets */ -void +static void iptablesRemoveTcpInput(virFirewall *fw, virFirewallLayer layer, const char *iface, @@ -243,7 +243,7 @@ iptablesRemoveTcpInput(virFirewall *fw, * Add an input to the IP table allowing access to the given @port on * the given @iface interface for UDP packets */ -void +static void iptablesAddUdpInput(virFirewall *fw, virFirewallLayer layer, const char *iface, @@ -261,7 +261,7 @@ iptablesAddUdpInput(virFirewall *fw, * Removes an input from the IP table, hence forbidding access to the given * @port on the given @iface interface for UDP packets */ -void +static void iptablesRemoveUdpInput(virFirewall *fw, virFirewallLayer layer, const char *iface, @@ -279,7 +279,7 @@ iptablesRemoveUdpInput(virFirewall *fw, * Add an output to the IP table allowing access to the given @port from * the given @iface interface for TCP packets */ -void +static void iptablesAddTcpOutput(virFirewall *fw, virFirewallLayer layer, const char *iface, @@ -297,7 +297,7 @@ iptablesAddTcpOutput(virFirewall *fw, * Removes an output from the IP table, hence forbidding access to the given * @port from the given @iface interface for TCP packets */ -void +static void iptablesRemoveTcpOutput(virFirewall *fw, virFirewallLayer layer, const char *iface, @@ -315,7 +315,7 @@ iptablesRemoveTcpOutput(virFirewall *fw, * Add an output to the IP table allowing access to the given @port from * the given @iface interface for UDP packets */ -void +static void iptablesAddUdpOutput(virFirewall *fw, virFirewallLayer layer, const char *iface, @@ -333,7 +333,7 @@ iptablesAddUdpOutput(virFirewall *fw, * Removes an output from the IP table, hence forbidding access to the given * @port from the given @iface interface for UDP packets */ -void +static void iptablesRemoveUdpOutput(virFirewall *fw, virFirewallLayer layer, const char *iface, @@ -397,7 +397,7 @@ iptablesForwardAllowOut(virFirewall *fw, * * Returns 0 in case of success or an error code otherwise */ -int +static int iptablesAddForwardAllowOut(virFirewall *fw, virSocketAddr *netaddr, unsigned int prefix, @@ -421,7 +421,7 @@ iptablesAddForwardAllowOut(virFirewall *fw, * * Returns 0 in case of success or an error code otherwise */ -int +static int iptablesRemoveForwardAllowOut(virFirewall *fw, virSocketAddr *netaddr, unsigned int prefix, @@ -491,7 +491,7 @@ iptablesForwardAllowRelatedIn(virFirewall *fw, * * Returns 0 in case of success or an error code otherwise */ -int +static int iptablesAddForwardAllowRelatedIn(virFirewall *fw, virSocketAddr *netaddr, unsigned int prefix, @@ -515,7 +515,7 @@ iptablesAddForwardAllowRelatedIn(virFirewall *fw, * * Returns 0 in case of success or an error code otherwise */ -int +static int iptablesRemoveForwardAllowRelatedIn(virFirewall *fw, virSocketAddr *netaddr, unsigned int prefix, @@ -578,7 +578,7 @@ iptablesForwardAllowIn(virFirewall *fw, * * Returns 0 in case of success or an error code otherwise */ -int +static int iptablesAddForwardAllowIn(virFirewall *fw, virSocketAddr *netaddr, unsigned int prefix, @@ -602,7 +602,7 @@ iptablesAddForwardAllowIn(virFirewall *fw, * * Returns 0 in case of success or an error code otherwise */ -int +static int iptablesRemoveForwardAllowIn(virFirewall *fw, virSocketAddr *netaddr, unsigned int prefix, @@ -640,7 +640,7 @@ iptablesForwardAllowCross(virFirewall *fw, * * Returns 0 in case of success or an error code otherwise */ -void +static void iptablesAddForwardAllowCross(virFirewall *fw, virFirewallLayer layer, const char *iface) @@ -659,7 +659,7 @@ iptablesAddForwardAllowCross(virFirewall *fw, * * Returns 0 in case of success or an error code otherwise */ -void +static void iptablesRemoveForwardAllowCross(virFirewall *fw, virFirewallLayer layer, const char *iface) @@ -692,7 +692,7 @@ iptablesForwardRejectOut(virFirewall *fw, * * Returns 0 in case of success or an error code otherwise */ -void +static void iptablesAddForwardRejectOut(virFirewall *fw, virFirewallLayer layer, const char *iface) @@ -710,7 +710,7 @@ iptablesAddForwardRejectOut(virFirewall *fw, * * Returns 0 in case of success or an error code otherwise */ -void +static void iptablesRemoveForwardRejectOut(virFirewall *fw, virFirewallLayer layer, const char *iface) @@ -744,7 +744,7 @@ iptablesForwardRejectIn(virFirewall *fw, * * Returns 0 in case of success or an error code otherwise */ -void +static void iptablesAddForwardRejectIn(virFirewall *fw, virFirewallLayer layer, const char *iface) @@ -762,7 +762,7 @@ iptablesAddForwardRejectIn(virFirewall *fw, * * Returns 0 in case of success or an error code otherwise */ -void +static void iptablesRemoveForwardRejectIn(virFirewall *fw, virFirewallLayer layer, const char *iface) @@ -882,7 +882,7 @@ iptablesForwardMasquerade(virFirewall *fw, * * Returns 0 in case of success or an error code otherwise */ -int +static int iptablesAddForwardMasquerade(virFirewall *fw, virSocketAddr *netaddr, unsigned int prefix, @@ -909,7 +909,7 @@ iptablesAddForwardMasquerade(virFirewall *fw, * * Returns 0 in case of success or an error code otherwise */ -int +static int iptablesRemoveForwardMasquerade(virFirewall *fw, virSocketAddr *netaddr, unsigned int prefix, @@ -979,7 +979,7 @@ iptablesForwardDontMasquerade(virFirewall *fw, * * Returns 0 in case of success or an error code otherwise. */ -int +static int iptablesAddDontMasquerade(virFirewall *fw, virSocketAddr *netaddr, unsigned int prefix, @@ -1004,7 +1004,7 @@ iptablesAddDontMasquerade(virFirewall *fw, * * Returns 0 in case of success or an error code otherwise. */ -int +static int iptablesRemoveDontMasquerade(virFirewall *fw, virSocketAddr *netaddr, unsigned int prefix, @@ -1047,7 +1047,7 @@ iptablesOutputFixUdpChecksum(virFirewall *fw, * the given @iface interface for TCP packets. * */ -void +static void iptablesAddOutputFixUdpChecksum(virFirewall *fw, const char *iface, int port) @@ -1064,7 +1064,7 @@ iptablesAddOutputFixUdpChecksum(virFirewall *fw, * Removes the checksum fixup rule that was previous added with * iptablesAddOutputFixUdpChecksum. */ -void +static void iptablesRemoveOutputFixUdpChecksum(virFirewall *fw, const char *iface, int port) diff --git a/src/network/network_iptables.h b/src/network/network_iptables.h index d3f6b48437..cdc143f154 100644 --- a/src/network/network_iptables.h +++ b/src/network/network_iptables.h @@ -20,7 +20,6 @@ #pragma once -#include "virsocketaddr.h" #include "virfirewall.h" #include "network_conf.h" @@ -29,132 +28,3 @@ int iptablesAddFirewallRules(virNetworkDef *def); void iptablesRemoveFirewallRules(virNetworkDef *def); int iptablesSetupPrivateChains(virFirewallLayer layer); - -void iptablesAddTcpInput (virFirewall *fw, - virFirewallLayer layer, - const char *iface, - int port); -void iptablesRemoveTcpInput (virFirewall *fw, - virFirewallLayer layer, - const char *iface, - int port); - -void iptablesAddUdpInput (virFirewall *fw, - virFirewallLayer layer, - const char *iface, - int port); -void iptablesRemoveUdpInput (virFirewall *fw, - virFirewallLayer layer, - const char *iface, - int port); - -void iptablesAddTcpOutput (virFirewall *fw, - virFirewallLayer layer, - const char *iface, - int port); -void iptablesRemoveTcpOutput (virFirewall *fw, - virFirewallLayer layer, - const char *iface, - int port); -void iptablesAddUdpOutput (virFirewall *fw, - virFirewallLayer layer, - const char *iface, - int port); -void iptablesRemoveUdpOutput (virFirewall *fw, - virFirewallLayer layer, - const char *iface, - int port); - -int iptablesAddForwardAllowOut (virFirewall *fw, - virSocketAddr *netaddr, - unsigned int prefix, - const char *iface, - const char *physdev) - G_GNUC_WARN_UNUSED_RESULT; -int iptablesRemoveForwardAllowOut (virFirewall *fw, - virSocketAddr *netaddr, - unsigned int prefix, - const char *iface, - const char *physdev) - G_GNUC_WARN_UNUSED_RESULT; -int iptablesAddForwardAllowRelatedIn(virFirewall *fw, - virSocketAddr *netaddr, - unsigned int prefix, - const char *iface, - const char *physdev) - G_GNUC_WARN_UNUSED_RESULT; -int iptablesRemoveForwardAllowRelatedIn(virFirewall *fw, - virSocketAddr *netaddr, - unsigned int prefix, - const char *iface, - const char *physdev) - G_GNUC_WARN_UNUSED_RESULT; - -int iptablesAddForwardAllowIn (virFirewall *fw, - virSocketAddr *netaddr, - unsigned int prefix, - const char *iface, - const char *physdev) - G_GNUC_WARN_UNUSED_RESULT; -int iptablesRemoveForwardAllowIn (virFirewall *fw, - virSocketAddr *netaddr, - unsigned int prefix, - const char *iface, - const char *physdev) - G_GNUC_WARN_UNUSED_RESULT; - -void iptablesAddForwardAllowCross (virFirewall *fw, - virFirewallLayer layer, - const char *iface); -void iptablesRemoveForwardAllowCross (virFirewall *fw, - virFirewallLayer layer, - const char *iface); - -void iptablesAddForwardRejectOut (virFirewall *fw, - virFirewallLayer layer, - const char *iface); -void iptablesRemoveForwardRejectOut (virFirewall *fw, - virFirewallLayer layer, - const char *iface); - -void iptablesAddForwardRejectIn (virFirewall *fw, - virFirewallLayer layer, - const char *iface); -void iptablesRemoveForwardRejectIn (virFirewall *fw, - virFirewallLayer layery, - const char *iface); - -int iptablesAddForwardMasquerade (virFirewall *fw, - virSocketAddr *netaddr, - unsigned int prefix, - const char *physdev, - virSocketAddrRange *addr, - virPortRange *port, - const char *protocol) - G_GNUC_WARN_UNUSED_RESULT; -int iptablesRemoveForwardMasquerade (virFirewall *fw, - virSocketAddr *netaddr, - unsigned int prefix, - const char *physdev, - virSocketAddrRange *addr, - virPortRange *port, - const char *protocol) - G_GNUC_WARN_UNUSED_RESULT; -int iptablesAddDontMasquerade (virFirewall *fw, - virSocketAddr *netaddr, - unsigned int prefix, - const char *physdev, - const char *destaddr) - G_GNUC_WARN_UNUSED_RESULT; -int iptablesRemoveDontMasquerade (virFirewall *fw, - virSocketAddr *netaddr, - unsigned int prefix, - const char *physdev, - const char *destaddr) - G_GNUC_WARN_UNUSED_RESULT; -void iptablesAddOutputFixUdpChecksum (virFirewall *fw, - const char *iface, - int port); -void iptablesRemoveOutputFixUdpChecksum (virFirewall *fw, - const char *iface, - int port); -- 2.44.0
Signed-off-by: Laine Stump <laine@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> --- src/network/network_iptables.c | 51 +++++++++++++++++++--------------- 1 file changed, 29 insertions(+), 22 deletions(-) diff --git a/src/network/network_iptables.c b/src/network/network_iptables.c index 697ad5d8d6..ac3e60b79f 100644 --- a/src/network/network_iptables.c +++ b/src/network/network_iptables.c @@ -38,6 +38,13 @@ VIR_LOG_INIT("network.iptables"); #define VIR_FROM_THIS VIR_FROM_NONE +#define VIR_IPTABLES_INPUT_CHAIN "LIBVIRT_INP" +#define VIR_IPTABLES_OUTPUT_CHAIN "LIBVIRT_OUT" +#define VIR_IPTABLES_FWD_IN_CHAIN "LIBVIRT_FWI" +#define VIR_IPTABLES_FWD_OUT_CHAIN "LIBVIRT_FWO" +#define VIR_IPTABLES_FWD_X_CHAIN "LIBVIRT_FWX" +#define VIR_IPTABLES_NAT_POSTROUTE_CHAIN "LIBVIRT_PRT" + enum { VIR_NETFILTER_INSERT = 0, VIR_NETFILTER_DELETE @@ -114,14 +121,14 @@ iptablesSetupPrivateChains(virFirewallLayer layer) { g_autoptr(virFirewall) fw = virFirewallNew(); iptablesGlobalChain filter_chains[] = { - {"INPUT", "LIBVIRT_INP"}, - {"OUTPUT", "LIBVIRT_OUT"}, - {"FORWARD", "LIBVIRT_FWO"}, - {"FORWARD", "LIBVIRT_FWI"}, - {"FORWARD", "LIBVIRT_FWX"}, + {"INPUT", VIR_IPTABLES_INPUT_CHAIN}, + {"OUTPUT", VIR_IPTABLES_OUTPUT_CHAIN}, + {"FORWARD", VIR_IPTABLES_FWD_OUT_CHAIN}, + {"FORWARD", VIR_IPTABLES_FWD_IN_CHAIN}, + {"FORWARD", VIR_IPTABLES_FWD_X_CHAIN}, }; iptablesGlobalChain natmangle_chains[] = { - {"POSTROUTING", "LIBVIRT_PRT"}, + {"POSTROUTING", VIR_IPTABLES_NAT_POSTROUTE_CHAIN}, }; bool changed = false; iptablesGlobalChainData data[] = { @@ -169,7 +176,7 @@ iptablesInput(virFirewall *fw, virFirewallAddRule(fw, layer, "--table", "filter", action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - "LIBVIRT_INP", + VIR_IPTABLES_INPUT_CHAIN, "--in-interface", iface, "--protocol", tcp ? "tcp" : "udp", "--destination-port", portstr, @@ -190,7 +197,7 @@ iptablesOutput(virFirewall *fw, virFirewallAddRule(fw, layer, "--table", "filter", action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - "LIBVIRT_OUT", + VIR_IPTABLES_OUTPUT_CHAIN, "--out-interface", iface, "--protocol", tcp ? "tcp" : "udp", "--destination-port", portstr, @@ -365,7 +372,7 @@ iptablesForwardAllowOut(virFirewall *fw, virFirewallAddRule(fw, layer, "--table", "filter", action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - "LIBVIRT_FWO", + VIR_IPTABLES_FWD_OUT_CHAIN, "--source", networkstr, "--in-interface", iface, "--out-interface", physdev, @@ -375,7 +382,7 @@ iptablesForwardAllowOut(virFirewall *fw, virFirewallAddRule(fw, layer, "--table", "filter", action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - "LIBVIRT_FWO", + VIR_IPTABLES_FWD_OUT_CHAIN, "--source", networkstr, "--in-interface", iface, "--jump", "ACCEPT", @@ -455,7 +462,7 @@ iptablesForwardAllowRelatedIn(virFirewall *fw, virFirewallAddRule(fw, layer, "--table", "filter", action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - "LIBVIRT_FWI", + VIR_IPTABLES_FWD_IN_CHAIN, "--destination", networkstr, "--in-interface", physdev, "--out-interface", iface, @@ -467,7 +474,7 @@ iptablesForwardAllowRelatedIn(virFirewall *fw, virFirewallAddRule(fw, layer, "--table", "filter", action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - "LIBVIRT_FWI", + VIR_IPTABLES_FWD_IN_CHAIN, "--destination", networkstr, "--out-interface", iface, "--match", "conntrack", @@ -547,7 +554,7 @@ iptablesForwardAllowIn(virFirewall *fw, virFirewallAddRule(fw, layer, "--table", "filter", action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - "LIBVIRT_FWI", + VIR_IPTABLES_FWD_IN_CHAIN, "--destination", networkstr, "--in-interface", physdev, "--out-interface", iface, @@ -557,7 +564,7 @@ iptablesForwardAllowIn(virFirewall *fw, virFirewallAddRule(fw, layer, "--table", "filter", action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - "LIBVIRT_FWI", + VIR_IPTABLES_FWD_IN_CHAIN, "--destination", networkstr, "--out-interface", iface, "--jump", "ACCEPT", @@ -622,7 +629,7 @@ iptablesForwardAllowCross(virFirewall *fw, virFirewallAddRule(fw, layer, "--table", "filter", action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - "LIBVIRT_FWX", + VIR_IPTABLES_FWD_X_CHAIN, "--in-interface", iface, "--out-interface", iface, "--jump", "ACCEPT", @@ -676,7 +683,7 @@ iptablesForwardRejectOut(virFirewall *fw, virFirewallAddRule(fw, layer, "--table", "filter", action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - "LIBVIRT_FWO", + VIR_IPTABLES_FWD_OUT_CHAIN, "--in-interface", iface, "--jump", "REJECT", NULL); @@ -728,7 +735,7 @@ iptablesForwardRejectIn(virFirewall *fw, virFirewallAddRule(fw, layer, "--table", "filter", action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - "LIBVIRT_FWI", + VIR_IPTABLES_FWD_IN_CHAIN, "--out-interface", iface, "--jump", "REJECT", NULL); @@ -810,7 +817,7 @@ iptablesForwardMasquerade(virFirewall *fw, rule = virFirewallAddRule(fw, layer, "--table", "nat", action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - "LIBVIRT_PRT", + VIR_IPTABLES_NAT_POSTROUTE_CHAIN, "--source", networkstr, "-p", protocol, "!", "--destination", networkstr, @@ -819,7 +826,7 @@ iptablesForwardMasquerade(virFirewall *fw, rule = virFirewallAddRule(fw, layer, "--table", "nat", action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - "LIBVIRT_PRT", + VIR_IPTABLES_NAT_POSTROUTE_CHAIN, "--source", networkstr, "!", "--destination", networkstr, NULL); @@ -946,7 +953,7 @@ iptablesForwardDontMasquerade(virFirewall *fw, virFirewallAddRule(fw, layer, "--table", "nat", action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - "LIBVIRT_PRT", + VIR_IPTABLES_NAT_POSTROUTE_CHAIN, "--out-interface", physdev, "--source", networkstr, "--destination", destaddr, @@ -956,7 +963,7 @@ iptablesForwardDontMasquerade(virFirewall *fw, virFirewallAddRule(fw, layer, "--table", "nat", action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - "LIBVIRT_PRT", + VIR_IPTABLES_NAT_POSTROUTE_CHAIN, "--source", networkstr, "--destination", destaddr, "--jump", "RETURN", @@ -1028,7 +1035,7 @@ iptablesOutputFixUdpChecksum(virFirewall *fw, virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, "--table", "mangle", action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - "LIBVIRT_PRT", + VIR_IPTABLES_NAT_POSTROUTE_CHAIN, "--out-interface", iface, "--protocol", "udp", "--destination-port", portstr, -- 2.44.0
These objects aren't rules, they are commands that are executed that may create a firewall rule, delete a firewall rule, or simply list the existing firewall rules. It's confusing for the objects to be called "Rule" (especially in the case of the function virFirewallRemoveRule(), which doesn't remove a rule from the firewall, it takes one of the objects out of the list of commands to execute! In order to remove a rule from the host's firewall, you have to Add a "rule" (now "cmd" aka command) to the list that will, when applied/run, remove a rule from the host firewall.) Changing the name to virFirewallCmd makes it all much less confusing. Signed-off-by: Laine Stump <laine@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> --- src/libvirt_private.syms | 16 +- src/network/network_iptables.c | 286 +++---- src/nwfilter/nwfilter_ebiptables_driver.c | 988 +++++++++++----------- src/util/virebtables.c | 32 +- src/util/virfirewall.c | 223 +++-- src/util/virfirewall.h | 54 +- tests/virfirewalltest.c | 404 ++++----- 7 files changed, 1000 insertions(+), 1003 deletions(-) diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 5925c53091..435be1b4c5 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -2403,17 +2403,17 @@ virFileCacheSetPriv; # util/virfirewall.h -virFirewallAddRuleFull; +virFirewallAddCmdFull; virFirewallApply; +virFirewallCmdAddArg; +virFirewallCmdAddArgFormat; +virFirewallCmdAddArgList; +virFirewallCmdAddArgSet; +virFirewallCmdGetArgCount; +virFirewallCmdToString; virFirewallFree; virFirewallNew; -virFirewallRemoveRule; -virFirewallRuleAddArg; -virFirewallRuleAddArgFormat; -virFirewallRuleAddArgList; -virFirewallRuleAddArgSet; -virFirewallRuleGetArgCount; -virFirewallRuleToString; +virFirewallRemoveCmd; virFirewallStartRollback; virFirewallStartTransaction; diff --git a/src/network/network_iptables.c b/src/network/network_iptables.c index ac3e60b79f..5c16683cff 100644 --- a/src/network/network_iptables.c +++ b/src/network/network_iptables.c @@ -98,18 +98,18 @@ iptablesPrivateChainCreate(virFirewall *fw, for (i = 0; i < data->nchains; i++) { const char *from; if (!virHashLookup(chains, data->chains[i].child)) { - virFirewallAddRule(fw, layer, - "--table", data->table, - "--new-chain", data->chains[i].child, NULL); + virFirewallAddCmd(fw, layer, + "--table", data->table, + "--new-chain", data->chains[i].child, NULL); *data->changed = true; } from = virHashLookup(links, data->chains[i].child); if (!from || STRNEQ(from, data->chains[i].parent)) - virFirewallAddRule(fw, layer, - "--table", data->table, - "--insert", data->chains[i].parent, - "--jump", data->chains[i].child, NULL); + virFirewallAddCmd(fw, layer, + "--table", data->table, + "--insert", data->chains[i].parent, + "--jump", data->chains[i].child, NULL); } return 0; @@ -151,10 +151,10 @@ iptablesSetupPrivateChains(virFirewallLayer layer) virFirewallStartTransaction(fw, 0); for (i = 0; i < G_N_ELEMENTS(data); i++) - virFirewallAddRuleFull(fw, data[i].layer, - false, iptablesPrivateChainCreate, - &(data[i]), "--table", data[i].table, - "--list-rules", NULL); + virFirewallAddCmdFull(fw, data[i].layer, + false, iptablesPrivateChainCreate, + &(data[i]), "--table", data[i].table, + "--list-rules", NULL); if (virFirewallApply(fw) < 0) return -1; @@ -173,15 +173,15 @@ iptablesInput(virFirewall *fw, { g_autofree char *portstr = g_strdup_printf("%d", port); - virFirewallAddRule(fw, layer, - "--table", "filter", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - VIR_IPTABLES_INPUT_CHAIN, - "--in-interface", iface, - "--protocol", tcp ? "tcp" : "udp", - "--destination-port", portstr, - "--jump", "ACCEPT", - NULL); + virFirewallAddCmd(fw, layer, + "--table", "filter", + action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + VIR_IPTABLES_INPUT_CHAIN, + "--in-interface", iface, + "--protocol", tcp ? "tcp" : "udp", + "--destination-port", portstr, + "--jump", "ACCEPT", + NULL); } static void @@ -194,15 +194,15 @@ iptablesOutput(virFirewall *fw, { g_autofree char *portstr = g_strdup_printf("%d", port); - virFirewallAddRule(fw, layer, - "--table", "filter", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - VIR_IPTABLES_OUTPUT_CHAIN, - "--out-interface", iface, - "--protocol", tcp ? "tcp" : "udp", - "--destination-port", portstr, - "--jump", "ACCEPT", - NULL); + virFirewallAddCmd(fw, layer, + "--table", "filter", + action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + VIR_IPTABLES_OUTPUT_CHAIN, + "--out-interface", iface, + "--protocol", tcp ? "tcp" : "udp", + "--destination-port", portstr, + "--jump", "ACCEPT", + NULL); } /** @@ -369,24 +369,24 @@ iptablesForwardAllowOut(virFirewall *fw, return -1; if (physdev && physdev[0]) - virFirewallAddRule(fw, layer, - "--table", "filter", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - VIR_IPTABLES_FWD_OUT_CHAIN, - "--source", networkstr, - "--in-interface", iface, - "--out-interface", physdev, - "--jump", "ACCEPT", - NULL); + virFirewallAddCmd(fw, layer, + "--table", "filter", + action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + VIR_IPTABLES_FWD_OUT_CHAIN, + "--source", networkstr, + "--in-interface", iface, + "--out-interface", physdev, + "--jump", "ACCEPT", + NULL); else - virFirewallAddRule(fw, layer, - "--table", "filter", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - VIR_IPTABLES_FWD_OUT_CHAIN, - "--source", networkstr, - "--in-interface", iface, - "--jump", "ACCEPT", - NULL); + virFirewallAddCmd(fw, layer, + "--table", "filter", + action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + VIR_IPTABLES_FWD_OUT_CHAIN, + "--source", networkstr, + "--in-interface", iface, + "--jump", "ACCEPT", + NULL); return 0; } @@ -459,28 +459,28 @@ iptablesForwardAllowRelatedIn(virFirewall *fw, return -1; if (physdev && physdev[0]) - virFirewallAddRule(fw, layer, - "--table", "filter", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - VIR_IPTABLES_FWD_IN_CHAIN, - "--destination", networkstr, - "--in-interface", physdev, - "--out-interface", iface, - "--match", "conntrack", - "--ctstate", "ESTABLISHED,RELATED", - "--jump", "ACCEPT", - NULL); + virFirewallAddCmd(fw, layer, + "--table", "filter", + action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + VIR_IPTABLES_FWD_IN_CHAIN, + "--destination", networkstr, + "--in-interface", physdev, + "--out-interface", iface, + "--match", "conntrack", + "--ctstate", "ESTABLISHED,RELATED", + "--jump", "ACCEPT", + NULL); else - virFirewallAddRule(fw, layer, - "--table", "filter", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - VIR_IPTABLES_FWD_IN_CHAIN, - "--destination", networkstr, - "--out-interface", iface, - "--match", "conntrack", - "--ctstate", "ESTABLISHED,RELATED", - "--jump", "ACCEPT", - NULL); + virFirewallAddCmd(fw, layer, + "--table", "filter", + action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + VIR_IPTABLES_FWD_IN_CHAIN, + "--destination", networkstr, + "--out-interface", iface, + "--match", "conntrack", + "--ctstate", "ESTABLISHED,RELATED", + "--jump", "ACCEPT", + NULL); return 0; } @@ -551,24 +551,24 @@ iptablesForwardAllowIn(virFirewall *fw, return -1; if (physdev && physdev[0]) - virFirewallAddRule(fw, layer, - "--table", "filter", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - VIR_IPTABLES_FWD_IN_CHAIN, - "--destination", networkstr, - "--in-interface", physdev, - "--out-interface", iface, - "--jump", "ACCEPT", - NULL); + virFirewallAddCmd(fw, layer, + "--table", "filter", + action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + VIR_IPTABLES_FWD_IN_CHAIN, + "--destination", networkstr, + "--in-interface", physdev, + "--out-interface", iface, + "--jump", "ACCEPT", + NULL); else - virFirewallAddRule(fw, layer, - "--table", "filter", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - VIR_IPTABLES_FWD_IN_CHAIN, - "--destination", networkstr, - "--out-interface", iface, - "--jump", "ACCEPT", - NULL); + virFirewallAddCmd(fw, layer, + "--table", "filter", + action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + VIR_IPTABLES_FWD_IN_CHAIN, + "--destination", networkstr, + "--out-interface", iface, + "--jump", "ACCEPT", + NULL); return 0; } @@ -626,14 +626,14 @@ iptablesForwardAllowCross(virFirewall *fw, const char *iface, int action) { - virFirewallAddRule(fw, layer, - "--table", "filter", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - VIR_IPTABLES_FWD_X_CHAIN, - "--in-interface", iface, - "--out-interface", iface, - "--jump", "ACCEPT", - NULL); + virFirewallAddCmd(fw, layer, + "--table", "filter", + action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + VIR_IPTABLES_FWD_X_CHAIN, + "--in-interface", iface, + "--out-interface", iface, + "--jump", "ACCEPT", + NULL); } /** @@ -680,13 +680,13 @@ iptablesForwardRejectOut(virFirewall *fw, const char *iface, int action) { - virFirewallAddRule(fw, layer, - "--table", "filter", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - VIR_IPTABLES_FWD_OUT_CHAIN, - "--in-interface", iface, - "--jump", "REJECT", - NULL); + virFirewallAddCmd(fw, layer, + "--table", "filter", + action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + VIR_IPTABLES_FWD_OUT_CHAIN, + "--in-interface", iface, + "--jump", "REJECT", + NULL); } /** @@ -732,13 +732,13 @@ iptablesForwardRejectIn(virFirewall *fw, const char *iface, int action) { - virFirewallAddRule(fw, layer, - "--table", "filter", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - VIR_IPTABLES_FWD_IN_CHAIN, - "--out-interface", iface, - "--jump", "REJECT", - NULL); + virFirewallAddCmd(fw, layer, + "--table", "filter", + action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + VIR_IPTABLES_FWD_IN_CHAIN, + "--out-interface", iface, + "--jump", "REJECT", + NULL); } /** @@ -796,7 +796,7 @@ iptablesForwardMasquerade(virFirewall *fw, g_autofree char *addrEndStr = NULL; g_autofree char *portRangeStr = NULL; g_autofree char *natRangeStr = NULL; - virFirewallRule *rule; + virFirewallCmd *fwCmd; int af = VIR_SOCKET_ADDR_FAMILY(netaddr); virFirewallLayer layer = af == AF_INET ? VIR_FIREWALL_LAYER_IPV4 : VIR_FIREWALL_LAYER_IPV6; @@ -814,7 +814,7 @@ iptablesForwardMasquerade(virFirewall *fw, } if (protocol && protocol[0]) { - rule = virFirewallAddRule(fw, layer, + fwCmd = virFirewallAddCmd(fw, layer, "--table", "nat", action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", VIR_IPTABLES_NAT_POSTROUTE_CHAIN, @@ -823,7 +823,7 @@ iptablesForwardMasquerade(virFirewall *fw, "!", "--destination", networkstr, NULL); } else { - rule = virFirewallAddRule(fw, layer, + fwCmd = virFirewallAddCmd(fw, layer, "--table", "nat", action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", VIR_IPTABLES_NAT_POSTROUTE_CHAIN, @@ -833,7 +833,7 @@ iptablesForwardMasquerade(virFirewall *fw, } if (physdev && physdev[0]) - virFirewallRuleAddArgList(fw, rule, "--out-interface", physdev, NULL); + virFirewallCmdAddArgList(fw, fwCmd, "--out-interface", physdev, NULL); if (protocol && protocol[0]) { if (port->start == 0 && port->end == 0) { @@ -861,16 +861,16 @@ iptablesForwardMasquerade(virFirewall *fw, portRangeStr ? portRangeStr : ""); } - virFirewallRuleAddArgList(fw, rule, - "--jump", "SNAT", - "--to-source", natRangeStr, NULL); + virFirewallCmdAddArgList(fw, fwCmd, + "--jump", "SNAT", + "--to-source", natRangeStr, NULL); } else { - virFirewallRuleAddArgList(fw, rule, - "--jump", "MASQUERADE", NULL); + virFirewallCmdAddArgList(fw, fwCmd, + "--jump", "MASQUERADE", NULL); if (portRangeStr && portRangeStr[0]) - virFirewallRuleAddArgList(fw, rule, - "--to-ports", &portRangeStr[1], NULL); + virFirewallCmdAddArgList(fw, fwCmd, + "--to-ports", &portRangeStr[1], NULL); } return 0; @@ -950,24 +950,24 @@ iptablesForwardDontMasquerade(virFirewall *fw, return -1; if (physdev && physdev[0]) - virFirewallAddRule(fw, layer, - "--table", "nat", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - VIR_IPTABLES_NAT_POSTROUTE_CHAIN, - "--out-interface", physdev, - "--source", networkstr, - "--destination", destaddr, - "--jump", "RETURN", - NULL); + virFirewallAddCmd(fw, layer, + "--table", "nat", + action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + VIR_IPTABLES_NAT_POSTROUTE_CHAIN, + "--out-interface", physdev, + "--source", networkstr, + "--destination", destaddr, + "--jump", "RETURN", + NULL); else - virFirewallAddRule(fw, layer, - "--table", "nat", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - VIR_IPTABLES_NAT_POSTROUTE_CHAIN, - "--source", networkstr, - "--destination", destaddr, - "--jump", "RETURN", - NULL); + virFirewallAddCmd(fw, layer, + "--table", "nat", + action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + VIR_IPTABLES_NAT_POSTROUTE_CHAIN, + "--source", networkstr, + "--destination", destaddr, + "--jump", "RETURN", + NULL); return 0; } @@ -1032,15 +1032,15 @@ iptablesOutputFixUdpChecksum(virFirewall *fw, { g_autofree char *portstr = g_strdup_printf("%d", port); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "--table", "mangle", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", - VIR_IPTABLES_NAT_POSTROUTE_CHAIN, - "--out-interface", iface, - "--protocol", "udp", - "--destination-port", portstr, - "--jump", "CHECKSUM", "--checksum-fill", - NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "--table", "mangle", + action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + VIR_IPTABLES_NAT_POSTROUTE_CHAIN, + "--out-interface", iface, + "--protocol", "udp", + "--destination-port", portstr, + "--jump", "CHECKSUM", "--checksum-fill", + NULL); } /** diff --git a/src/nwfilter/nwfilter_ebiptables_driver.c b/src/nwfilter/nwfilter_ebiptables_driver.c index 56bddb9097..3ef1bb576e 100644 --- a/src/nwfilter/nwfilter_ebiptables_driver.c +++ b/src/nwfilter/nwfilter_ebiptables_driver.c @@ -334,7 +334,7 @@ printDataTypeAsHex(virNWFilterVarCombIter *vars, static int ebtablesHandleEthHdr(virFirewall *fw, - virFirewallRule *fwrule, + virFirewallCmd *fwrule, virNWFilterVarCombIter *vars, ethHdrDataDef *ethHdr, bool reverse) @@ -348,11 +348,11 @@ ebtablesHandleEthHdr(virFirewall *fw, ðHdr->dataSrcMACAddr) < 0) return -1; - virFirewallRuleAddArgList(fw, fwrule, - reverse ? "-d" : "-s", - NULL); + virFirewallCmdAddArgList(fw, fwrule, + reverse ? "-d" : "-s", + NULL); if (ENTRY_WANT_NEG_SIGN(ðHdr->dataSrcMACAddr)) - virFirewallRuleAddArg(fw, fwrule, "!"); + virFirewallCmdAddArg(fw, fwrule, "!"); if (HAS_ENTRY_ITEM(ðHdr->dataSrcMACMask)) { if (printDataType(vars, @@ -360,10 +360,10 @@ ebtablesHandleEthHdr(virFirewall *fw, ðHdr->dataSrcMACMask) < 0) return -1; - virFirewallRuleAddArgFormat(fw, fwrule, - "%s/%s", macaddr, macmask); + virFirewallCmdAddArgFormat(fw, fwrule, + "%s/%s", macaddr, macmask); } else { - virFirewallRuleAddArg(fw, fwrule, macaddr); + virFirewallCmdAddArg(fw, fwrule, macaddr); } } @@ -373,11 +373,11 @@ ebtablesHandleEthHdr(virFirewall *fw, ðHdr->dataDstMACAddr) < 0) return -1; - virFirewallRuleAddArgList(fw, fwrule, - reverse ? "-s" : "-d", - NULL); + virFirewallCmdAddArgList(fw, fwrule, + reverse ? "-s" : "-d", + NULL); if (ENTRY_WANT_NEG_SIGN(ðHdr->dataDstMACAddr)) - virFirewallRuleAddArg(fw, fwrule, "!"); + virFirewallCmdAddArg(fw, fwrule, "!"); if (HAS_ENTRY_ITEM(ðHdr->dataDstMACMask)) { if (printDataType(vars, @@ -385,10 +385,10 @@ ebtablesHandleEthHdr(virFirewall *fw, ðHdr->dataDstMACMask) < 0) return -1; - virFirewallRuleAddArgFormat(fw, fwrule, - "%s/%s", macaddr, macmask); + virFirewallCmdAddArgFormat(fw, fwrule, + "%s/%s", macaddr, macmask); } else { - virFirewallRuleAddArg(fw, fwrule, macaddr); + virFirewallCmdAddArg(fw, fwrule, macaddr); } } @@ -403,38 +403,38 @@ static void iptablesCreateBaseChainsFW(virFirewall *fw, virFirewallLayer layer) { - virFirewallAddRuleFull(fw, layer, - true, NULL, NULL, - "-N", VIRT_IN_CHAIN, NULL); - virFirewallAddRuleFull(fw, layer, - true, NULL, NULL, - "-N", VIRT_OUT_CHAIN, NULL); - virFirewallAddRuleFull(fw, layer, - true, NULL, NULL, - "-N", VIRT_IN_POST_CHAIN, NULL); - virFirewallAddRuleFull(fw, layer, - true, NULL, NULL, - "-N", HOST_IN_CHAIN, NULL); - virFirewallAddRuleFull(fw, layer, - true, NULL, NULL, - "-D", "FORWARD", "-j", VIRT_IN_CHAIN, NULL); - virFirewallAddRuleFull(fw, layer, - true, NULL, NULL, - "-D", "FORWARD", "-j", VIRT_OUT_CHAIN, NULL); - virFirewallAddRuleFull(fw, layer, - true, NULL, NULL, - "-D", "FORWARD", "-j", VIRT_IN_POST_CHAIN, NULL); - virFirewallAddRuleFull(fw, layer, - true, NULL, NULL, - "-D", "INPUT", "-j", HOST_IN_CHAIN, NULL); - virFirewallAddRule(fw, layer, - "-I", "FORWARD", "1", "-j", VIRT_IN_CHAIN, NULL); - virFirewallAddRule(fw, layer, - "-I", "FORWARD", "2", "-j", VIRT_OUT_CHAIN, NULL); - virFirewallAddRule(fw, layer, - "-I", "FORWARD", "3", "-j", VIRT_IN_POST_CHAIN, NULL); - virFirewallAddRule(fw, layer, - "-I", "INPUT", "1", "-j", HOST_IN_CHAIN, NULL); + virFirewallAddCmdFull(fw, layer, + true, NULL, NULL, + "-N", VIRT_IN_CHAIN, NULL); + virFirewallAddCmdFull(fw, layer, + true, NULL, NULL, + "-N", VIRT_OUT_CHAIN, NULL); + virFirewallAddCmdFull(fw, layer, + true, NULL, NULL, + "-N", VIRT_IN_POST_CHAIN, NULL); + virFirewallAddCmdFull(fw, layer, + true, NULL, NULL, + "-N", HOST_IN_CHAIN, NULL); + virFirewallAddCmdFull(fw, layer, + true, NULL, NULL, + "-D", "FORWARD", "-j", VIRT_IN_CHAIN, NULL); + virFirewallAddCmdFull(fw, layer, + true, NULL, NULL, + "-D", "FORWARD", "-j", VIRT_OUT_CHAIN, NULL); + virFirewallAddCmdFull(fw, layer, + true, NULL, NULL, + "-D", "FORWARD", "-j", VIRT_IN_POST_CHAIN, NULL); + virFirewallAddCmdFull(fw, layer, + true, NULL, NULL, + "-D", "INPUT", "-j", HOST_IN_CHAIN, NULL); + virFirewallAddCmd(fw, layer, + "-I", "FORWARD", "1", "-j", VIRT_IN_CHAIN, NULL); + virFirewallAddCmd(fw, layer, + "-I", "FORWARD", "2", "-j", VIRT_OUT_CHAIN, NULL); + virFirewallAddCmd(fw, layer, + "-I", "FORWARD", "3", "-j", VIRT_IN_POST_CHAIN, NULL); + virFirewallAddCmd(fw, layer, + "-I", "INPUT", "1", "-j", HOST_IN_CHAIN, NULL); } @@ -453,8 +453,8 @@ iptablesCreateTmpRootChainFW(virFirewall *fw, PRINT_IPT_ROOT_CHAIN(chain, chainPrefix, ifname); - virFirewallAddRule(fw, layer, - "-N", chain, NULL); + virFirewallAddCmd(fw, layer, + "-N", chain, NULL); } @@ -490,12 +490,12 @@ _iptablesRemoveRootChainFW(virFirewall *fw, PRINT_IPT_ROOT_CHAIN(chain, chainPrefix, ifname); - virFirewallAddRuleFull(fw, layer, - true, NULL, NULL, - "-F", chain, NULL); - virFirewallAddRuleFull(fw, layer, - true, NULL, NULL, - "-X", chain, NULL); + virFirewallAddCmdFull(fw, layer, + true, NULL, NULL, + "-F", chain, NULL); + virFirewallAddCmdFull(fw, layer, + true, NULL, NULL, + "-X", chain, NULL); } @@ -561,17 +561,17 @@ iptablesLinkTmpRootChainFW(virFirewall *fw, PRINT_IPT_ROOT_CHAIN(chain, chainPrefix, ifname); if (incoming) - virFirewallAddRule(fw, layer, - "-A", basechain, - MATCH_PHYSDEV_IN_FW, - ifname, - "-g", chain, NULL); + virFirewallAddCmd(fw, layer, + "-A", basechain, + MATCH_PHYSDEV_IN_FW, + ifname, + "-g", chain, NULL); else - virFirewallAddRule(fw, layer, - "-A", basechain, - MATCH_PHYSDEV_OUT_FW, - ifname, - "-g", chain, NULL); + virFirewallAddCmd(fw, layer, + "-A", basechain, + MATCH_PHYSDEV_OUT_FW, + ifname, + "-g", chain, NULL); } @@ -591,15 +591,15 @@ iptablesSetupVirtInPostFW(virFirewall *fw G_GNUC_UNUSED, virFirewallLayer layer G_GNUC_UNUSED, const char *ifname G_GNUC_UNUSED) { - virFirewallAddRuleFull(fw, layer, - true, NULL, NULL, - "-D", VIRT_IN_POST_CHAIN, - MATCH_PHYSDEV_IN_FW, - ifname, "-j", "ACCEPT", NULL); - virFirewallAddRule(fw, layer, - "-A", VIRT_IN_POST_CHAIN, - MATCH_PHYSDEV_IN_FW, - ifname, "-j", "ACCEPT", NULL); + virFirewallAddCmdFull(fw, layer, + true, NULL, NULL, + "-D", VIRT_IN_POST_CHAIN, + MATCH_PHYSDEV_IN_FW, + ifname, "-j", "ACCEPT", NULL); + virFirewallAddCmd(fw, layer, + "-A", VIRT_IN_POST_CHAIN, + MATCH_PHYSDEV_IN_FW, + ifname, "-j", "ACCEPT", NULL); } @@ -608,11 +608,11 @@ iptablesClearVirtInPostFW(virFirewall *fw, virFirewallLayer layer, const char *ifname) { - virFirewallAddRuleFull(fw, layer, - true, NULL, NULL, - "-D", VIRT_IN_POST_CHAIN, - MATCH_PHYSDEV_IN_FW, - ifname, "-j", "ACCEPT", NULL); + virFirewallAddCmdFull(fw, layer, + true, NULL, NULL, + "-D", VIRT_IN_POST_CHAIN, + MATCH_PHYSDEV_IN_FW, + ifname, "-j", "ACCEPT", NULL); } @@ -638,19 +638,19 @@ _iptablesUnlinkRootChainFW(virFirewall *fw, PRINT_IPT_ROOT_CHAIN(chain, chainPrefix, ifname); if (incoming) - virFirewallAddRuleFull(fw, layer, - true, NULL, NULL, - "-D", basechain, - MATCH_PHYSDEV_IN_FW, ifname, - "-g", chain, - NULL); + virFirewallAddCmdFull(fw, layer, + true, NULL, NULL, + "-D", basechain, + MATCH_PHYSDEV_IN_FW, ifname, + "-g", chain, + NULL); else - virFirewallAddRuleFull(fw, layer, - true, NULL, NULL, - "-D", basechain, - MATCH_PHYSDEV_OUT_FW, ifname, - "-g", chain, - NULL); + virFirewallAddCmdFull(fw, layer, + true, NULL, NULL, + "-D", basechain, + MATCH_PHYSDEV_OUT_FW, ifname, + "-g", chain, + NULL); /* * Previous versions of libvirt may have created a rule @@ -658,12 +658,12 @@ _iptablesUnlinkRootChainFW(virFirewall *fw, * as well. */ if (!incoming) - virFirewallAddRuleFull(fw, layer, - true, NULL, NULL, - "-D", basechain, - MATCH_PHYSDEV_OUT_OLD_FW, ifname, - "-g", chain, - NULL); + virFirewallAddCmdFull(fw, layer, + true, NULL, NULL, + "-D", basechain, + MATCH_PHYSDEV_OUT_OLD_FW, ifname, + "-g", chain, + NULL); } @@ -735,8 +735,8 @@ iptablesRenameTmpRootChainFW(virFirewall *fw, PRINT_IPT_ROOT_CHAIN(tmpchain, tmpChainPrefix, ifname); PRINT_IPT_ROOT_CHAIN(chain, chainPrefix, ifname); - virFirewallAddRule(fw, layer, - "-E", tmpchain, chain, NULL); + virFirewallAddCmd(fw, layer, + "-E", tmpchain, chain, NULL); } @@ -753,7 +753,7 @@ iptablesRenameTmpRootChainsFW(virFirewall *fw, static int iptablesHandleSrcMacAddr(virFirewall *fw, - virFirewallRule *fwrule, + virFirewallCmd *fwrule, virNWFilterVarCombIter *vars, nwItemDesc *srcMacAddr, bool directionIn, @@ -774,15 +774,15 @@ iptablesHandleSrcMacAddr(virFirewall *fw, srcMacAddr) < 0) return -1; - virFirewallRuleAddArgList(fw, fwrule, - "-m", "mac", - NULL); + virFirewallCmdAddArgList(fw, fwrule, + "-m", "mac", + NULL); if (ENTRY_WANT_NEG_SIGN(srcMacAddr)) - virFirewallRuleAddArg(fw, fwrule, "!"); - virFirewallRuleAddArgList(fw, fwrule, - "--mac-source", - macaddr, - NULL); + virFirewallCmdAddArg(fw, fwrule, "!"); + virFirewallCmdAddArgList(fw, fwrule, + "--mac-source", + macaddr, + NULL); } return 0; @@ -791,7 +791,7 @@ iptablesHandleSrcMacAddr(virFirewall *fw, static int iptablesHandleIPHdr(virFirewall *fw, - virFirewallRule *fwrule, + virFirewallCmd *fwrule, virNWFilterVarCombIter *vars, ipHdrDataDef *ipHdr, bool directionIn, @@ -819,8 +819,8 @@ iptablesHandleIPHdr(virFirewall *fw, return -1; if (ENTRY_WANT_NEG_SIGN(&ipHdr->dataSrcIPAddr)) - virFirewallRuleAddArg(fw, fwrule, "!"); - virFirewallRuleAddArg(fw, fwrule, src); + virFirewallCmdAddArg(fw, fwrule, "!"); + virFirewallCmdAddArg(fw, fwrule, src); if (HAS_ENTRY_ITEM(&ipHdr->dataSrcIPMask)) { @@ -829,10 +829,10 @@ iptablesHandleIPHdr(virFirewall *fw, &ipHdr->dataSrcIPMask) < 0) return -1; - virFirewallRuleAddArgFormat(fw, fwrule, - "%s/%s", ipaddr, number); + virFirewallCmdAddArgFormat(fw, fwrule, + "%s/%s", ipaddr, number); } else { - virFirewallRuleAddArg(fw, fwrule, ipaddr); + virFirewallCmdAddArg(fw, fwrule, ipaddr); } } else if (HAS_ENTRY_ITEM(&ipHdr->dataSrcIPFrom)) { if (printDataType(vars, @@ -840,12 +840,12 @@ iptablesHandleIPHdr(virFirewall *fw, &ipHdr->dataSrcIPFrom) < 0) return -1; - virFirewallRuleAddArgList(fw, fwrule, - "-m", "iprange", - NULL); + virFirewallCmdAddArgList(fw, fwrule, + "-m", "iprange", + NULL); if (ENTRY_WANT_NEG_SIGN(&ipHdr->dataSrcIPFrom)) - virFirewallRuleAddArg(fw, fwrule, "!"); - virFirewallRuleAddArg(fw, fwrule, srcrange); + virFirewallCmdAddArg(fw, fwrule, "!"); + virFirewallCmdAddArg(fw, fwrule, srcrange); if (HAS_ENTRY_ITEM(&ipHdr->dataSrcIPTo)) { @@ -854,10 +854,10 @@ iptablesHandleIPHdr(virFirewall *fw, &ipHdr->dataSrcIPTo) < 0) return -1; - virFirewallRuleAddArgFormat(fw, fwrule, - "%s-%s", ipaddr, ipaddralt); + virFirewallCmdAddArgFormat(fw, fwrule, + "%s-%s", ipaddr, ipaddralt); } else { - virFirewallRuleAddArg(fw, fwrule, ipaddr); + virFirewallCmdAddArg(fw, fwrule, ipaddr); } } @@ -868,8 +868,8 @@ iptablesHandleIPHdr(virFirewall *fw, return -1; if (ENTRY_WANT_NEG_SIGN(&ipHdr->dataDstIPAddr)) - virFirewallRuleAddArg(fw, fwrule, "!"); - virFirewallRuleAddArg(fw, fwrule, dst); + virFirewallCmdAddArg(fw, fwrule, "!"); + virFirewallCmdAddArg(fw, fwrule, dst); if (HAS_ENTRY_ITEM(&ipHdr->dataDstIPMask)) { if (printDataType(vars, @@ -877,10 +877,10 @@ iptablesHandleIPHdr(virFirewall *fw, &ipHdr->dataDstIPMask) < 0) return -1; - virFirewallRuleAddArgFormat(fw, fwrule, - "%s/%s", ipaddr, number); + virFirewallCmdAddArgFormat(fw, fwrule, + "%s/%s", ipaddr, number); } else { - virFirewallRuleAddArg(fw, fwrule, ipaddr); + virFirewallCmdAddArg(fw, fwrule, ipaddr); } } else if (HAS_ENTRY_ITEM(&ipHdr->dataDstIPFrom)) { if (printDataType(vars, @@ -888,12 +888,12 @@ iptablesHandleIPHdr(virFirewall *fw, &ipHdr->dataDstIPFrom) < 0) return -1; - virFirewallRuleAddArgList(fw, fwrule, - "-m", "iprange", - NULL); + virFirewallCmdAddArgList(fw, fwrule, + "-m", "iprange", + NULL); if (ENTRY_WANT_NEG_SIGN(&ipHdr->dataDstIPFrom)) - virFirewallRuleAddArg(fw, fwrule, "!"); - virFirewallRuleAddArg(fw, fwrule, dstrange); + virFirewallCmdAddArg(fw, fwrule, "!"); + virFirewallCmdAddArg(fw, fwrule, dstrange); if (HAS_ENTRY_ITEM(&ipHdr->dataDstIPTo)) { if (printDataType(vars, @@ -901,10 +901,10 @@ iptablesHandleIPHdr(virFirewall *fw, &ipHdr->dataDstIPTo) < 0) return -1; - virFirewallRuleAddArgFormat(fw, fwrule, - "%s-%s", ipaddr, ipaddralt); + virFirewallCmdAddArgFormat(fw, fwrule, + "%s-%s", ipaddr, ipaddralt); } else { - virFirewallRuleAddArg(fw, fwrule, ipaddr); + virFirewallCmdAddArg(fw, fwrule, ipaddr); } } @@ -914,14 +914,14 @@ iptablesHandleIPHdr(virFirewall *fw, &ipHdr->dataDSCP) < 0) return -1; - virFirewallRuleAddArgList(fw, fwrule, - "-m", "dscp", - NULL); + virFirewallCmdAddArgList(fw, fwrule, + "-m", "dscp", + NULL); if (ENTRY_WANT_NEG_SIGN(&ipHdr->dataDSCP)) - virFirewallRuleAddArg(fw, fwrule, "!"); - virFirewallRuleAddArgList(fw, fwrule, - "--dscp", number, - NULL); + virFirewallCmdAddArg(fw, fwrule, "!"); + virFirewallCmdAddArgList(fw, fwrule, + "--dscp", number, + NULL); } if (HAS_ENTRY_ITEM(&ipHdr->dataConnlimitAbove)) { @@ -939,7 +939,7 @@ iptablesHandleIPHdr(virFirewall *fw, static int iptablesHandleIPHdrAfterStateMatch(virFirewall *fw, - virFirewallRule *fwrule, + virFirewallCmd *fwrule, virNWFilterVarCombIter *vars, ipHdrDataDef *ipHdr, bool directionIn) @@ -955,17 +955,17 @@ iptablesHandleIPHdrAfterStateMatch(virFirewall *fw, &ipHdr->dataIPSet) < 0) return -1; - virFirewallRuleAddArgList(fw, fwrule, - "-m", "set", - "--match-set", str, - NULL); + virFirewallCmdAddArgList(fw, fwrule, + "-m", "set", + "--match-set", str, + NULL); if (printDataTypeDirection(vars, str, sizeof(str), &ipHdr->dataIPSetFlags, directionIn) < 0) return -1; - virFirewallRuleAddArg(fw, fwrule, str); + virFirewallCmdAddArg(fw, fwrule, str); } if (HAS_ENTRY_ITEM(&ipHdr->dataConnlimitAbove)) { @@ -977,24 +977,24 @@ iptablesHandleIPHdrAfterStateMatch(virFirewall *fw, /* place connlimit after potential -m state --state ... since this is the most useful order */ - virFirewallRuleAddArgList(fw, fwrule, - "-m", "connlimit", - NULL); + virFirewallCmdAddArgList(fw, fwrule, + "-m", "connlimit", + NULL); if (ENTRY_WANT_NEG_SIGN(&ipHdr->dataConnlimitAbove)) - virFirewallRuleAddArg(fw, fwrule, "!"); - virFirewallRuleAddArgList(fw, fwrule, - "--connlimit-above", number, - NULL); + virFirewallCmdAddArg(fw, fwrule, "!"); + virFirewallCmdAddArgList(fw, fwrule, + "--connlimit-above", number, + NULL); } } if (HAS_ENTRY_ITEM(&ipHdr->dataComment)) { /* keep comments behind everything else -- they are packet eval. no-ops */ - virFirewallRuleAddArgList(fw, fwrule, - "-m", "comment", - "--comment", ipHdr->dataComment.u.string, - NULL); + virFirewallCmdAddArgList(fw, fwrule, + "-m", "comment", + "--comment", ipHdr->dataComment.u.string, + NULL); } return 0; @@ -1003,7 +1003,7 @@ iptablesHandleIPHdrAfterStateMatch(virFirewall *fw, static int iptablesHandlePortData(virFirewall *fw, - virFirewallRule *fwrule, + virFirewallCmd *fwrule, virNWFilterVarCombIter *vars, portDataDef *portData, bool directionIn) @@ -1024,8 +1024,8 @@ iptablesHandlePortData(virFirewall *fw, return -1; if (ENTRY_WANT_NEG_SIGN(&portData->dataSrcPortStart)) - virFirewallRuleAddArg(fw, fwrule, "!"); - virFirewallRuleAddArg(fw, fwrule, sport); + virFirewallCmdAddArg(fw, fwrule, "!"); + virFirewallCmdAddArg(fw, fwrule, sport); if (HAS_ENTRY_ITEM(&portData->dataSrcPortEnd)) { if (printDataType(vars, @@ -1033,10 +1033,10 @@ iptablesHandlePortData(virFirewall *fw, &portData->dataSrcPortEnd) < 0) return -1; - virFirewallRuleAddArgFormat(fw, fwrule, - "%s:%s", portstr, portstralt); + virFirewallCmdAddArgFormat(fw, fwrule, + "%s:%s", portstr, portstralt); } else { - virFirewallRuleAddArg(fw, fwrule, portstr); + virFirewallCmdAddArg(fw, fwrule, portstr); } } @@ -1047,8 +1047,8 @@ iptablesHandlePortData(virFirewall *fw, return -1; if (ENTRY_WANT_NEG_SIGN(&portData->dataDstPortStart)) - virFirewallRuleAddArg(fw, fwrule, "!"); - virFirewallRuleAddArg(fw, fwrule, dport); + virFirewallCmdAddArg(fw, fwrule, "!"); + virFirewallCmdAddArg(fw, fwrule, dport); if (HAS_ENTRY_ITEM(&portData->dataDstPortEnd)) { if (printDataType(vars, @@ -1056,10 +1056,10 @@ iptablesHandlePortData(virFirewall *fw, &portData->dataDstPortEnd) < 0) return -1; - virFirewallRuleAddArgFormat(fw, fwrule, - "%s:%s", portstr, portstralt); + virFirewallCmdAddArgFormat(fw, fwrule, + "%s:%s", portstr, portstralt); } else { - virFirewallRuleAddArg(fw, fwrule, portstr); + virFirewallCmdAddArg(fw, fwrule, portstr); } } @@ -1069,18 +1069,18 @@ iptablesHandlePortData(virFirewall *fw, static void iptablesEnforceDirection(virFirewall *fw, - virFirewallRule *fwrule, + virFirewallCmd *fwrule, bool directionIn, virNWFilterRuleDef *rule) { if (rule->tt != VIR_NWFILTER_RULE_DIRECTION_INOUT) - virFirewallRuleAddArgList(fw, fwrule, - "-m", "conntrack", - "--ctdir", - (directionIn ? - "Reply" : - "Original"), - NULL); + virFirewallCmdAddArgList(fw, fwrule, + "-m", "conntrack", + "--ctdir", + (directionIn ? + "Reply" : + "Original"), + NULL); } @@ -1123,7 +1123,7 @@ _iptablesCreateRuleInstance(virFirewall *fw, bool skipRule = false; bool skipMatch = false; bool hasICMPType = false; - virFirewallRule *fwrule; + virFirewallCmd *fwrule; size_t fwruleargs; PRINT_IPT_ROOT_CHAIN(chain, chainPrefix, ifname); @@ -1131,12 +1131,12 @@ _iptablesCreateRuleInstance(virFirewall *fw, switch ((int)rule->prtclType) { case VIR_NWFILTER_RULE_PROTOCOL_TCP: case VIR_NWFILTER_RULE_PROTOCOL_TCPoIPV6: - fwrule = virFirewallAddRule(fw, layer, - "-A", chain, - "-p", "tcp", - NULL); + fwrule = virFirewallAddCmd(fw, layer, + "-A", chain, + "-p", "tcp", + NULL); - fwruleargs = virFirewallRuleGetArgCount(fwrule); + fwruleargs = virFirewallCmdGetArgCount(fwrule); if (iptablesHandleSrcMacAddr(fw, fwrule, vars, @@ -1156,16 +1156,16 @@ _iptablesCreateRuleInstance(virFirewall *fw, g_autofree char *mask = NULL; g_autofree char *flags = NULL; if (ENTRY_WANT_NEG_SIGN(&rule->p.tcpHdrFilter.dataTCPFlags)) - virFirewallRuleAddArg(fw, fwrule, "!"); - virFirewallRuleAddArg(fw, fwrule, "--tcp-flags"); + virFirewallCmdAddArg(fw, fwrule, "!"); + virFirewallCmdAddArg(fw, fwrule, "--tcp-flags"); if (!(mask = virNWFilterPrintTCPFlags(rule->p.tcpHdrFilter.dataTCPFlags.u.tcpFlags.mask))) return -1; - virFirewallRuleAddArg(fw, fwrule, mask); + virFirewallCmdAddArg(fw, fwrule, mask); if (!(flags = virNWFilterPrintTCPFlags(rule->p.tcpHdrFilter.dataTCPFlags.u.tcpFlags.flags))) return -1; - virFirewallRuleAddArg(fw, fwrule, flags); + virFirewallCmdAddArg(fw, fwrule, flags); } if (iptablesHandlePortData(fw, fwrule, @@ -1181,21 +1181,21 @@ _iptablesCreateRuleInstance(virFirewall *fw, return -1; if (ENTRY_WANT_NEG_SIGN(&rule->p.tcpHdrFilter.dataTCPOption)) - virFirewallRuleAddArg(fw, fwrule, "!"); - virFirewallRuleAddArgList(fw, fwrule, - "--tcp-option", number, NULL); + virFirewallCmdAddArg(fw, fwrule, "!"); + virFirewallCmdAddArgList(fw, fwrule, + "--tcp-option", number, NULL); } break; case VIR_NWFILTER_RULE_PROTOCOL_UDP: case VIR_NWFILTER_RULE_PROTOCOL_UDPoIPV6: - fwrule = virFirewallAddRule(fw, layer, - "-A", chain, - "-p", "udp", - NULL); + fwrule = virFirewallAddCmd(fw, layer, + "-A", chain, + "-p", "udp", + NULL); - fwruleargs = virFirewallRuleGetArgCount(fwrule); + fwruleargs = virFirewallCmdGetArgCount(fwrule); if (iptablesHandleSrcMacAddr(fw, fwrule, vars, @@ -1220,12 +1220,12 @@ _iptablesCreateRuleInstance(virFirewall *fw, case VIR_NWFILTER_RULE_PROTOCOL_UDPLITE: case VIR_NWFILTER_RULE_PROTOCOL_UDPLITEoIPV6: - fwrule = virFirewallAddRule(fw, layer, - "-A", chain, - "-p", "udplite", - NULL); + fwrule = virFirewallAddCmd(fw, layer, + "-A", chain, + "-p", "udplite", + NULL); - fwruleargs = virFirewallRuleGetArgCount(fwrule); + fwruleargs = virFirewallCmdGetArgCount(fwrule); if (iptablesHandleSrcMacAddr(fw, fwrule, vars, @@ -1245,12 +1245,12 @@ _iptablesCreateRuleInstance(virFirewall *fw, case VIR_NWFILTER_RULE_PROTOCOL_ESP: case VIR_NWFILTER_RULE_PROTOCOL_ESPoIPV6: - fwrule = virFirewallAddRule(fw, layer, - "-A", chain, - "-p", "esp", - NULL); + fwrule = virFirewallAddCmd(fw, layer, + "-A", chain, + "-p", "esp", + NULL); - fwruleargs = virFirewallRuleGetArgCount(fwrule); + fwruleargs = virFirewallCmdGetArgCount(fwrule); if (iptablesHandleSrcMacAddr(fw, fwrule, vars, @@ -1270,12 +1270,12 @@ _iptablesCreateRuleInstance(virFirewall *fw, case VIR_NWFILTER_RULE_PROTOCOL_AH: case VIR_NWFILTER_RULE_PROTOCOL_AHoIPV6: - fwrule = virFirewallAddRule(fw, layer, - "-A", chain, - "-p", "ah", - NULL); + fwrule = virFirewallAddCmd(fw, layer, + "-A", chain, + "-p", "ah", + NULL); - fwruleargs = virFirewallRuleGetArgCount(fwrule); + fwruleargs = virFirewallCmdGetArgCount(fwrule); if (iptablesHandleSrcMacAddr(fw, fwrule, vars, @@ -1295,12 +1295,12 @@ _iptablesCreateRuleInstance(virFirewall *fw, case VIR_NWFILTER_RULE_PROTOCOL_SCTP: case VIR_NWFILTER_RULE_PROTOCOL_SCTPoIPV6: - fwrule = virFirewallAddRule(fw, layer, - "-A", chain, - "-p", "sctp", - NULL); + fwrule = virFirewallAddCmd(fw, layer, + "-A", chain, + "-p", "sctp", + NULL); - fwruleargs = virFirewallRuleGetArgCount(fwrule); + fwruleargs = virFirewallCmdGetArgCount(fwrule); if (iptablesHandleSrcMacAddr(fw, fwrule, vars, @@ -1325,18 +1325,18 @@ _iptablesCreateRuleInstance(virFirewall *fw, case VIR_NWFILTER_RULE_PROTOCOL_ICMP: case VIR_NWFILTER_RULE_PROTOCOL_ICMPV6: - fwrule = virFirewallAddRule(fw, layer, - "-A", chain, - NULL); + fwrule = virFirewallAddCmd(fw, layer, + "-A", chain, + NULL); if (rule->prtclType == VIR_NWFILTER_RULE_PROTOCOL_ICMP) - virFirewallRuleAddArgList(fw, fwrule, - "-p", "icmp", NULL); + virFirewallCmdAddArgList(fw, fwrule, + "-p", "icmp", NULL); else - virFirewallRuleAddArgList(fw, fwrule, - "-p", "icmpv6", NULL); + virFirewallCmdAddArgList(fw, fwrule, + "-p", "icmpv6", NULL); - fwruleargs = virFirewallRuleGetArgCount(fwrule); + fwruleargs = virFirewallCmdGetArgCount(fwrule); if (iptablesHandleSrcMacAddr(fw, fwrule, vars, @@ -1358,7 +1358,7 @@ _iptablesCreateRuleInstance(virFirewall *fw, hasICMPType = true; if (maySkipICMP) { - virFirewallRemoveRule(fw, fwrule); + virFirewallRemoveCmd(fw, fwrule); return 0; } @@ -1373,8 +1373,8 @@ _iptablesCreateRuleInstance(virFirewall *fw, return -1; if (ENTRY_WANT_NEG_SIGN(&rule->p.icmpHdrFilter.dataICMPType)) - virFirewallRuleAddArg(fw, fwrule, "!"); - virFirewallRuleAddArg(fw, fwrule, parm); + virFirewallCmdAddArg(fw, fwrule, "!"); + virFirewallCmdAddArg(fw, fwrule, parm); if (HAS_ENTRY_ITEM(&rule->p.icmpHdrFilter.dataICMPCode)) { if (printDataType(vars, @@ -1382,21 +1382,21 @@ _iptablesCreateRuleInstance(virFirewall *fw, &rule->p.icmpHdrFilter.dataICMPCode) < 0) return -1; - virFirewallRuleAddArgFormat(fw, fwrule, - "%s/%s", number, numberalt); + virFirewallCmdAddArgFormat(fw, fwrule, + "%s/%s", number, numberalt); } else { - virFirewallRuleAddArg(fw, fwrule, number); + virFirewallCmdAddArg(fw, fwrule, number); } } break; case VIR_NWFILTER_RULE_PROTOCOL_IGMP: - fwrule = virFirewallAddRule(fw, layer, - "-A", chain, - "-p", "igmp", - NULL); + fwrule = virFirewallAddCmd(fw, layer, + "-A", chain, + "-p", "igmp", + NULL); - fwruleargs = virFirewallRuleGetArgCount(fwrule); + fwruleargs = virFirewallCmdGetArgCount(fwrule); if (iptablesHandleSrcMacAddr(fw, fwrule, vars, @@ -1416,12 +1416,12 @@ _iptablesCreateRuleInstance(virFirewall *fw, case VIR_NWFILTER_RULE_PROTOCOL_ALL: case VIR_NWFILTER_RULE_PROTOCOL_ALLoIPV6: - fwrule = virFirewallAddRule(fw, layer, - "-A", chain, - "-p", "all", - NULL); + fwrule = virFirewallAddCmd(fw, layer, + "-A", chain, + "-p", "all", + NULL); - fwruleargs = virFirewallRuleGetArgCount(fwrule); + fwruleargs = virFirewallCmdGetArgCount(fwrule); if (iptablesHandleSrcMacAddr(fw, fwrule, vars, @@ -1447,9 +1447,9 @@ _iptablesCreateRuleInstance(virFirewall *fw, } if ((srcMacSkipped && - fwruleargs == virFirewallRuleGetArgCount(fwrule)) || + fwruleargs == virFirewallCmdGetArgCount(fwrule)) || skipRule) { - virFirewallRemoveRule(fw, fwrule); + virFirewallRemoveCmd(fw, fwrule); return 0; } @@ -1461,10 +1461,10 @@ _iptablesCreateRuleInstance(virFirewall *fw, } if (match && !skipMatch) { - virFirewallRuleAddArgList(fw, fwrule, - "-m", "conntrack", - "--ctstate", match, - NULL); + virFirewallCmdAddArgList(fw, fwrule, + "-m", "conntrack", + "--ctstate", match, + NULL); } if (defMatch && match != NULL && !skipMatch && !hasICMPType) @@ -1478,8 +1478,8 @@ _iptablesCreateRuleInstance(virFirewall *fw, directionIn) < 0) return -1; - virFirewallRuleAddArgList(fw, fwrule, - "-j", target, NULL); + virFirewallCmdAddArgList(fw, fwrule, + "-j", target, NULL); return 0; } @@ -1752,7 +1752,7 @@ ebtablesCreateRuleInstance(virFirewall *fw, char chain[MAX_CHAINNAME_LENGTH]; const char *target; bool hasMask = false; - virFirewallRule *fwrule; + virFirewallCmd *fwrule; if (STREQ(chainSuffix, virNWFilterChainSuffixTypeToString( @@ -1768,10 +1768,10 @@ ebtablesCreateRuleInstance(virFirewall *fw, field, sizeof(field), \ &rule->p.STRUCT.ITEM) < 0) \ return -1; \ - virFirewallRuleAddArg(fw, fwrule, CLI); \ + virFirewallCmdAddArg(fw, fwrule, CLI); \ if (ENTRY_WANT_NEG_SIGN(&rule->p.STRUCT.ITEM)) \ - virFirewallRuleAddArg(fw, fwrule, "!"); \ - virFirewallRuleAddArg(fw, fwrule, field); \ + virFirewallCmdAddArg(fw, fwrule, "!"); \ + virFirewallCmdAddArg(fw, fwrule, field); \ } #define INST_ITEM_2PARMS(STRUCT, ITEM, ITEM_HI, CLI, SEP) \ @@ -1780,18 +1780,18 @@ ebtablesCreateRuleInstance(virFirewall *fw, field, sizeof(field), \ &rule->p.STRUCT.ITEM) < 0) \ return -1; \ - virFirewallRuleAddArg(fw, fwrule, CLI); \ + virFirewallCmdAddArg(fw, fwrule, CLI); \ if (ENTRY_WANT_NEG_SIGN(&rule->p.STRUCT.ITEM)) \ - virFirewallRuleAddArg(fw, fwrule, "!"); \ + virFirewallCmdAddArg(fw, fwrule, "!"); \ if (HAS_ENTRY_ITEM(&rule->p.STRUCT.ITEM_HI)) { \ if (printDataType(vars, \ fieldalt, sizeof(fieldalt), \ &rule->p.STRUCT.ITEM_HI) < 0) \ return -1; \ - virFirewallRuleAddArgFormat(fw, fwrule, \ - "%s%s%s", field, SEP, fieldalt); \ + virFirewallCmdAddArgFormat(fw, fwrule, \ + "%s%s%s", field, SEP, fieldalt); \ } else { \ - virFirewallRuleAddArg(fw, fwrule, field); \ + virFirewallCmdAddArg(fw, fwrule, field); \ } \ } #define INST_ITEM_RANGE(S, I, I_HI, C) \ @@ -1801,9 +1801,9 @@ ebtablesCreateRuleInstance(virFirewall *fw, switch ((int)rule->prtclType) { case VIR_NWFILTER_RULE_PROTOCOL_MAC: - fwrule = virFirewallAddRule(fw, VIR_FIREWALL_LAYER_ETHERNET, - "-t", "nat", - "-A", chain, NULL); + fwrule = virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_ETHERNET, + "-t", "nat", + "-A", chain, NULL); if (ebtablesHandleEthHdr(fw, fwrule, vars, @@ -1816,16 +1816,16 @@ ebtablesCreateRuleInstance(virFirewall *fw, number, sizeof(number), &rule->p.ethHdrFilter.dataProtocolID) < 0) return -1; - virFirewallRuleAddArg(fw, fwrule, "-p"); + virFirewallCmdAddArg(fw, fwrule, "-p"); if (ENTRY_WANT_NEG_SIGN(&rule->p.ethHdrFilter.dataProtocolID)) - virFirewallRuleAddArg(fw, fwrule, "!"); - virFirewallRuleAddArg(fw, fwrule, number); + virFirewallCmdAddArg(fw, fwrule, "!"); + virFirewallCmdAddArg(fw, fwrule, number); } break; case VIR_NWFILTER_RULE_PROTOCOL_VLAN: - fwrule = virFirewallAddRule(fw, VIR_FIREWALL_LAYER_ETHERNET, - "-t", "nat", "-A", chain, NULL); + fwrule = virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_ETHERNET, + "-t", "nat", "-A", chain, NULL); if (ebtablesHandleEthHdr(fw, fwrule, vars, @@ -1833,8 +1833,8 @@ ebtablesCreateRuleInstance(virFirewall *fw, reverse) < 0) return -1; - virFirewallRuleAddArgList(fw, fwrule, - "-p", "0x8100", NULL); + virFirewallCmdAddArgList(fw, fwrule, + "-p", "0x8100", NULL); INST_ITEM(vlanHdrFilter, dataVlanID, "--vlan-id") INST_ITEM(vlanHdrFilter, dataVlanEncap, "--vlan-encap") @@ -1852,8 +1852,8 @@ ebtablesCreateRuleInstance(virFirewall *fw, return -1; } - fwrule = virFirewallAddRule(fw, VIR_FIREWALL_LAYER_ETHERNET, - "-t", "nat", "-A", chain, NULL); + fwrule = virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_ETHERNET, + "-t", "nat", "-A", chain, NULL); if (ebtablesHandleEthHdr(fw, fwrule, vars, @@ -1861,8 +1861,8 @@ ebtablesCreateRuleInstance(virFirewall *fw, reverse) < 0) return -1; - virFirewallRuleAddArgList(fw, fwrule, - "-d", NWFILTER_MAC_BGA, NULL); + virFirewallCmdAddArgList(fw, fwrule, + "-d", NWFILTER_MAC_BGA, NULL); INST_ITEM(stpHdrFilter, dataType, "--stp-type") INST_ITEM(stpHdrFilter, dataFlags, "--stp-flags") @@ -1888,8 +1888,8 @@ ebtablesCreateRuleInstance(virFirewall *fw, case VIR_NWFILTER_RULE_PROTOCOL_ARP: case VIR_NWFILTER_RULE_PROTOCOL_RARP: - fwrule = virFirewallAddRule(fw, VIR_FIREWALL_LAYER_ETHERNET, - "-t", "nat", "-A", chain, NULL); + fwrule = virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_ETHERNET, + "-t", "nat", "-A", chain, NULL); if (ebtablesHandleEthHdr(fw, fwrule, vars, @@ -1897,21 +1897,21 @@ ebtablesCreateRuleInstance(virFirewall *fw, reverse) < 0) return -1; - virFirewallRuleAddArg(fw, fwrule, "-p"); - virFirewallRuleAddArgFormat(fw, fwrule, "0x%x", - (rule->prtclType == VIR_NWFILTER_RULE_PROTOCOL_ARP) - ? l3_protocols[L3_PROTO_ARP_IDX].attr - : l3_protocols[L3_PROTO_RARP_IDX].attr); + virFirewallCmdAddArg(fw, fwrule, "-p"); + virFirewallCmdAddArgFormat(fw, fwrule, "0x%x", + (rule->prtclType == VIR_NWFILTER_RULE_PROTOCOL_ARP) + ? l3_protocols[L3_PROTO_ARP_IDX].attr + : l3_protocols[L3_PROTO_RARP_IDX].attr); if (HAS_ENTRY_ITEM(&rule->p.arpHdrFilter.dataHWType)) { if (printDataType(vars, number, sizeof(number), &rule->p.arpHdrFilter.dataHWType) < 0) return -1; - virFirewallRuleAddArg(fw, fwrule, "--arp-htype"); + virFirewallCmdAddArg(fw, fwrule, "--arp-htype"); if (ENTRY_WANT_NEG_SIGN(&rule->p.arpHdrFilter.dataHWType)) - virFirewallRuleAddArg(fw, fwrule, "!"); - virFirewallRuleAddArg(fw, fwrule, number); + virFirewallCmdAddArg(fw, fwrule, "!"); + virFirewallCmdAddArg(fw, fwrule, number); } if (HAS_ENTRY_ITEM(&rule->p.arpHdrFilter.dataOpcode)) { @@ -1919,10 +1919,10 @@ ebtablesCreateRuleInstance(virFirewall *fw, number, sizeof(number), &rule->p.arpHdrFilter.dataOpcode) < 0) return -1; - virFirewallRuleAddArg(fw, fwrule, "--arp-opcode"); + virFirewallCmdAddArg(fw, fwrule, "--arp-opcode"); if (ENTRY_WANT_NEG_SIGN(&rule->p.arpHdrFilter.dataOpcode)) - virFirewallRuleAddArg(fw, fwrule, "!"); - virFirewallRuleAddArg(fw, fwrule, number); + virFirewallCmdAddArg(fw, fwrule, "!"); + virFirewallCmdAddArg(fw, fwrule, number); } if (HAS_ENTRY_ITEM(&rule->p.arpHdrFilter.dataProtocolType)) { @@ -1930,10 +1930,10 @@ ebtablesCreateRuleInstance(virFirewall *fw, number, sizeof(number), &rule->p.arpHdrFilter.dataProtocolType) < 0) return -1; - virFirewallRuleAddArg(fw, fwrule, "--arp-ptype"); + virFirewallCmdAddArg(fw, fwrule, "--arp-ptype"); if (ENTRY_WANT_NEG_SIGN(&rule->p.arpHdrFilter.dataProtocolType)) - virFirewallRuleAddArg(fw, fwrule, "!"); - virFirewallRuleAddArg(fw, fwrule, number); + virFirewallCmdAddArg(fw, fwrule, "!"); + virFirewallCmdAddArg(fw, fwrule, number); } if (HAS_ENTRY_ITEM(&rule->p.arpHdrFilter.dataARPSrcIPAddr)) { @@ -1950,12 +1950,12 @@ ebtablesCreateRuleInstance(virFirewall *fw, hasMask = true; } - virFirewallRuleAddArg(fw, fwrule, + virFirewallCmdAddArg(fw, fwrule, reverse ? "--arp-ip-dst" : "--arp-ip-src"); if (ENTRY_WANT_NEG_SIGN(&rule->p.arpHdrFilter.dataARPSrcIPAddr)) - virFirewallRuleAddArg(fw, fwrule, "!"); - virFirewallRuleAddArgFormat(fw, fwrule, - "%s/%s", ipaddr, hasMask ? ipmask : "32"); + virFirewallCmdAddArg(fw, fwrule, "!"); + virFirewallCmdAddArgFormat(fw, fwrule, + "%s/%s", ipaddr, hasMask ? ipmask : "32"); } if (HAS_ENTRY_ITEM(&rule->p.arpHdrFilter.dataARPDstIPAddr)) { @@ -1972,12 +1972,12 @@ ebtablesCreateRuleInstance(virFirewall *fw, hasMask = true; } - virFirewallRuleAddArg(fw, fwrule, + virFirewallCmdAddArg(fw, fwrule, reverse ? "--arp-ip-src" : "--arp-ip-dst"); if (ENTRY_WANT_NEG_SIGN(&rule->p.arpHdrFilter.dataARPDstIPAddr)) - virFirewallRuleAddArg(fw, fwrule, "!"); - virFirewallRuleAddArgFormat(fw, fwrule, - "%s/%s", ipaddr, hasMask ? ipmask : "32"); + virFirewallCmdAddArg(fw, fwrule, "!"); + virFirewallCmdAddArgFormat(fw, fwrule, + "%s/%s", ipaddr, hasMask ? ipmask : "32"); } if (HAS_ENTRY_ITEM(&rule->p.arpHdrFilter.dataARPSrcMACAddr)) { @@ -1986,11 +1986,11 @@ ebtablesCreateRuleInstance(virFirewall *fw, &rule->p.arpHdrFilter.dataARPSrcMACAddr) < 0) return -1; - virFirewallRuleAddArg(fw, fwrule, - reverse ? "--arp-mac-dst" : "--arp-mac-src"); + virFirewallCmdAddArg(fw, fwrule, + reverse ? "--arp-mac-dst" : "--arp-mac-src"); if (ENTRY_WANT_NEG_SIGN(&rule->p.arpHdrFilter.dataARPSrcMACAddr)) - virFirewallRuleAddArg(fw, fwrule, "!"); - virFirewallRuleAddArg(fw, fwrule, macaddr); + virFirewallCmdAddArg(fw, fwrule, "!"); + virFirewallCmdAddArg(fw, fwrule, macaddr); } if (HAS_ENTRY_ITEM(&rule->p.arpHdrFilter.dataARPDstMACAddr)) { @@ -1999,24 +1999,24 @@ ebtablesCreateRuleInstance(virFirewall *fw, &rule->p.arpHdrFilter.dataARPDstMACAddr) < 0) return -1; - virFirewallRuleAddArg(fw, fwrule, - reverse ? "--arp-mac-src" : "--arp-mac-dst"); + virFirewallCmdAddArg(fw, fwrule, + reverse ? "--arp-mac-src" : "--arp-mac-dst"); if (ENTRY_WANT_NEG_SIGN(&rule->p.arpHdrFilter.dataARPDstMACAddr)) - virFirewallRuleAddArg(fw, fwrule, "!"); - virFirewallRuleAddArg(fw, fwrule, macaddr); + virFirewallCmdAddArg(fw, fwrule, "!"); + virFirewallCmdAddArg(fw, fwrule, macaddr); } if (HAS_ENTRY_ITEM(&rule->p.arpHdrFilter.dataGratuitousARP) && rule->p.arpHdrFilter.dataGratuitousARP.u.boolean) { if (ENTRY_WANT_NEG_SIGN(&rule->p.arpHdrFilter.dataGratuitousARP)) - virFirewallRuleAddArg(fw, fwrule, "!"); - virFirewallRuleAddArg(fw, fwrule, "--arp-gratuitous"); + virFirewallCmdAddArg(fw, fwrule, "!"); + virFirewallCmdAddArg(fw, fwrule, "--arp-gratuitous"); } break; case VIR_NWFILTER_RULE_PROTOCOL_IP: - fwrule = virFirewallAddRule(fw, VIR_FIREWALL_LAYER_ETHERNET, - "-t", "nat", "-A", chain, NULL); + fwrule = virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_ETHERNET, + "-t", "nat", "-A", chain, NULL); if (ebtablesHandleEthHdr(fw, fwrule, vars, @@ -2024,8 +2024,8 @@ ebtablesCreateRuleInstance(virFirewall *fw, reverse) < 0) return -1; - virFirewallRuleAddArgList(fw, fwrule, - "-p", "ipv4", NULL); + virFirewallCmdAddArgList(fw, fwrule, + "-p", "ipv4", NULL); if (HAS_ENTRY_ITEM(&rule->p.ipHdrFilter.ipHdr.dataSrcIPAddr)) { if (printDataType(vars, @@ -2033,20 +2033,20 @@ ebtablesCreateRuleInstance(virFirewall *fw, &rule->p.ipHdrFilter.ipHdr.dataSrcIPAddr) < 0) return -1; - virFirewallRuleAddArg(fw, fwrule, - reverse ? "--ip-destination" : "--ip-source"); + virFirewallCmdAddArg(fw, fwrule, + reverse ? "--ip-destination" : "--ip-source"); if (ENTRY_WANT_NEG_SIGN(&rule->p.ipHdrFilter.ipHdr.dataSrcIPAddr)) - virFirewallRuleAddArg(fw, fwrule, "!"); + virFirewallCmdAddArg(fw, fwrule, "!"); if (HAS_ENTRY_ITEM(&rule->p.ipHdrFilter.ipHdr.dataSrcIPMask)) { if (printDataType(vars, number, sizeof(number), &rule->p.ipHdrFilter.ipHdr.dataSrcIPMask) < 0) return -1; - virFirewallRuleAddArgFormat(fw, fwrule, - "%s/%s", ipaddr, number); + virFirewallCmdAddArgFormat(fw, fwrule, + "%s/%s", ipaddr, number); } else { - virFirewallRuleAddArg(fw, fwrule, ipaddr); + virFirewallCmdAddArg(fw, fwrule, ipaddr); } } @@ -2057,20 +2057,20 @@ ebtablesCreateRuleInstance(virFirewall *fw, &rule->p.ipHdrFilter.ipHdr.dataDstIPAddr) < 0) return -1; - virFirewallRuleAddArg(fw, fwrule, - reverse ? "--ip-source" : "--ip-destination"); + virFirewallCmdAddArg(fw, fwrule, + reverse ? "--ip-source" : "--ip-destination"); if (ENTRY_WANT_NEG_SIGN(&rule->p.ipHdrFilter.ipHdr.dataDstIPAddr)) - virFirewallRuleAddArg(fw, fwrule, "!"); + virFirewallCmdAddArg(fw, fwrule, "!"); if (HAS_ENTRY_ITEM(&rule->p.ipHdrFilter.ipHdr.dataDstIPMask)) { if (printDataType(vars, number, sizeof(number), &rule->p.ipHdrFilter.ipHdr.dataDstIPMask) < 0) return -1; - virFirewallRuleAddArgFormat(fw, fwrule, - "%s/%s", ipaddr, number); + virFirewallCmdAddArgFormat(fw, fwrule, + "%s/%s", ipaddr, number); } else { - virFirewallRuleAddArg(fw, fwrule, ipaddr); + virFirewallCmdAddArg(fw, fwrule, ipaddr); } } @@ -2080,10 +2080,10 @@ ebtablesCreateRuleInstance(virFirewall *fw, &rule->p.ipHdrFilter.ipHdr.dataProtocolID) < 0) return -1; - virFirewallRuleAddArg(fw, fwrule, "--ip-protocol"); + virFirewallCmdAddArg(fw, fwrule, "--ip-protocol"); if (ENTRY_WANT_NEG_SIGN(&rule->p.ipHdrFilter.ipHdr.dataProtocolID)) - virFirewallRuleAddArg(fw, fwrule, "!"); - virFirewallRuleAddArg(fw, fwrule, number); + virFirewallCmdAddArg(fw, fwrule, "!"); + virFirewallCmdAddArg(fw, fwrule, number); } if (HAS_ENTRY_ITEM(&rule->p.ipHdrFilter.portData.dataSrcPortStart)) { @@ -2092,10 +2092,10 @@ ebtablesCreateRuleInstance(virFirewall *fw, &rule->p.ipHdrFilter.portData.dataSrcPortStart) < 0) return -1; - virFirewallRuleAddArg(fw, fwrule, - reverse ? "--ip-destination-port" : "--ip-source-port"); + virFirewallCmdAddArg(fw, fwrule, + reverse ? "--ip-destination-port" : "--ip-source-port"); if (ENTRY_WANT_NEG_SIGN(&rule->p.ipHdrFilter.portData.dataSrcPortStart)) - virFirewallRuleAddArg(fw, fwrule, "!"); + virFirewallCmdAddArg(fw, fwrule, "!"); if (HAS_ENTRY_ITEM(&rule->p.ipHdrFilter.portData.dataSrcPortEnd)) { if (printDataType(vars, @@ -2103,10 +2103,10 @@ ebtablesCreateRuleInstance(virFirewall *fw, &rule->p.ipHdrFilter.portData.dataSrcPortEnd) < 0) return -1; - virFirewallRuleAddArgFormat(fw, fwrule, - "%s:%s", number, numberalt); + virFirewallCmdAddArgFormat(fw, fwrule, + "%s:%s", number, numberalt); } else { - virFirewallRuleAddArg(fw, fwrule, number); + virFirewallCmdAddArg(fw, fwrule, number); } } @@ -2116,10 +2116,10 @@ ebtablesCreateRuleInstance(virFirewall *fw, &rule->p.ipHdrFilter.portData.dataDstPortStart) < 0) return -1; - virFirewallRuleAddArg(fw, fwrule, - reverse ? "--ip-source-port" : "--ip-destination-port"); + virFirewallCmdAddArg(fw, fwrule, + reverse ? "--ip-source-port" : "--ip-destination-port"); if (ENTRY_WANT_NEG_SIGN(&rule->p.ipHdrFilter.portData.dataDstPortStart)) - virFirewallRuleAddArg(fw, fwrule, "!"); + virFirewallCmdAddArg(fw, fwrule, "!"); if (HAS_ENTRY_ITEM(&rule->p.ipHdrFilter.portData.dataDstPortEnd)) { if (printDataType(vars, @@ -2127,10 +2127,10 @@ ebtablesCreateRuleInstance(virFirewall *fw, &rule->p.ipHdrFilter.portData.dataDstPortEnd) < 0) return -1; - virFirewallRuleAddArgFormat(fw, fwrule, - "%s:%s", number, numberalt); + virFirewallCmdAddArgFormat(fw, fwrule, + "%s:%s", number, numberalt); } else { - virFirewallRuleAddArg(fw, fwrule, number); + virFirewallCmdAddArg(fw, fwrule, number); } } @@ -2140,16 +2140,16 @@ ebtablesCreateRuleInstance(virFirewall *fw, &rule->p.ipHdrFilter.ipHdr.dataDSCP) < 0) return -1; - virFirewallRuleAddArg(fw, fwrule, "--ip-tos"); + virFirewallCmdAddArg(fw, fwrule, "--ip-tos"); if (ENTRY_WANT_NEG_SIGN(&rule->p.ipHdrFilter.ipHdr.dataDSCP)) - virFirewallRuleAddArg(fw, fwrule, "!"); - virFirewallRuleAddArg(fw, fwrule, number); + virFirewallCmdAddArg(fw, fwrule, "!"); + virFirewallCmdAddArg(fw, fwrule, number); } break; case VIR_NWFILTER_RULE_PROTOCOL_IPV6: - fwrule = virFirewallAddRule(fw, VIR_FIREWALL_LAYER_ETHERNET, - "-t", "nat", "-A", chain, NULL); + fwrule = virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_ETHERNET, + "-t", "nat", "-A", chain, NULL); if (ebtablesHandleEthHdr(fw, fwrule, vars, @@ -2157,8 +2157,8 @@ ebtablesCreateRuleInstance(virFirewall *fw, reverse) < 0) return -1; - virFirewallRuleAddArgList(fw, fwrule, - "-p", "ipv6", NULL); + virFirewallCmdAddArgList(fw, fwrule, + "-p", "ipv6", NULL); if (HAS_ENTRY_ITEM(&rule->p.ipv6HdrFilter.ipHdr.dataSrcIPAddr)) { if (printDataType(vars, @@ -2166,20 +2166,20 @@ ebtablesCreateRuleInstance(virFirewall *fw, &rule->p.ipv6HdrFilter.ipHdr.dataSrcIPAddr) < 0) return -1; - virFirewallRuleAddArg(fw, fwrule, - reverse ? "--ip6-destination" : "--ip6-source"); + virFirewallCmdAddArg(fw, fwrule, + reverse ? "--ip6-destination" : "--ip6-source"); if (ENTRY_WANT_NEG_SIGN(&rule->p.ipv6HdrFilter.ipHdr.dataSrcIPAddr)) - virFirewallRuleAddArg(fw, fwrule, "!"); + virFirewallCmdAddArg(fw, fwrule, "!"); if (HAS_ENTRY_ITEM(&rule->p.ipv6HdrFilter.ipHdr.dataSrcIPMask)) { if (printDataType(vars, number, sizeof(number), &rule->p.ipv6HdrFilter.ipHdr.dataSrcIPMask) < 0) return -1; - virFirewallRuleAddArgFormat(fw, fwrule, - "%s/%s", ipv6addr, number); + virFirewallCmdAddArgFormat(fw, fwrule, + "%s/%s", ipv6addr, number); } else { - virFirewallRuleAddArg(fw, fwrule, ipv6addr); + virFirewallCmdAddArg(fw, fwrule, ipv6addr); } } @@ -2190,20 +2190,20 @@ ebtablesCreateRuleInstance(virFirewall *fw, &rule->p.ipv6HdrFilter.ipHdr.dataDstIPAddr) < 0) return -1; - virFirewallRuleAddArg(fw, fwrule, - reverse ? "--ip6-source" : "--ip6-destination"); + virFirewallCmdAddArg(fw, fwrule, + reverse ? "--ip6-source" : "--ip6-destination"); if (ENTRY_WANT_NEG_SIGN(&rule->p.ipv6HdrFilter.ipHdr.dataDstIPAddr)) - virFirewallRuleAddArg(fw, fwrule, "!"); + virFirewallCmdAddArg(fw, fwrule, "!"); if (HAS_ENTRY_ITEM(&rule->p.ipv6HdrFilter.ipHdr.dataDstIPMask)) { if (printDataType(vars, number, sizeof(number), &rule->p.ipv6HdrFilter.ipHdr.dataDstIPMask) < 0) return -1; - virFirewallRuleAddArgFormat(fw, fwrule, - "%s/%s", ipv6addr, number); + virFirewallCmdAddArgFormat(fw, fwrule, + "%s/%s", ipv6addr, number); } else { - virFirewallRuleAddArg(fw, fwrule, ipv6addr); + virFirewallCmdAddArg(fw, fwrule, ipv6addr); } } @@ -2213,10 +2213,10 @@ ebtablesCreateRuleInstance(virFirewall *fw, &rule->p.ipv6HdrFilter.ipHdr.dataProtocolID) < 0) return -1; - virFirewallRuleAddArg(fw, fwrule, "--ip6-protocol"); + virFirewallCmdAddArg(fw, fwrule, "--ip6-protocol"); if (ENTRY_WANT_NEG_SIGN(&rule->p.ipv6HdrFilter.ipHdr.dataProtocolID)) - virFirewallRuleAddArg(fw, fwrule, "!"); - virFirewallRuleAddArg(fw, fwrule, number); + virFirewallCmdAddArg(fw, fwrule, "!"); + virFirewallCmdAddArg(fw, fwrule, number); } if (HAS_ENTRY_ITEM(&rule->p.ipv6HdrFilter.portData.dataSrcPortStart)) { @@ -2226,10 +2226,10 @@ ebtablesCreateRuleInstance(virFirewall *fw, &rule->p.ipv6HdrFilter.portData.dataSrcPortStart) < 0) return -1; - virFirewallRuleAddArg(fw, fwrule, - reverse ? "--ip6-destination-port" : "--ip6-source-port"); + virFirewallCmdAddArg(fw, fwrule, + reverse ? "--ip6-destination-port" : "--ip6-source-port"); if (ENTRY_WANT_NEG_SIGN(&rule->p.ipv6HdrFilter.portData.dataSrcPortStart)) - virFirewallRuleAddArg(fw, fwrule, "!"); + virFirewallCmdAddArg(fw, fwrule, "!"); if (HAS_ENTRY_ITEM(&rule->p.ipv6HdrFilter.portData.dataSrcPortEnd)) { if (printDataType(vars, @@ -2237,10 +2237,10 @@ ebtablesCreateRuleInstance(virFirewall *fw, &rule->p.ipv6HdrFilter.portData.dataSrcPortEnd) < 0) return -1; - virFirewallRuleAddArgFormat(fw, fwrule, - "%s:%s", number, numberalt); + virFirewallCmdAddArgFormat(fw, fwrule, + "%s:%s", number, numberalt); } else { - virFirewallRuleAddArg(fw, fwrule, number); + virFirewallCmdAddArg(fw, fwrule, number); } } @@ -2251,10 +2251,10 @@ ebtablesCreateRuleInstance(virFirewall *fw, &rule->p.ipv6HdrFilter.portData.dataDstPortStart) < 0) return -1; - virFirewallRuleAddArg(fw, fwrule, - reverse ? "--ip6-source-port" : "--ip6-destination-port"); + virFirewallCmdAddArg(fw, fwrule, + reverse ? "--ip6-source-port" : "--ip6-destination-port"); if (ENTRY_WANT_NEG_SIGN(&rule->p.ipv6HdrFilter.portData.dataDstPortStart)) - virFirewallRuleAddArg(fw, fwrule, "!"); + virFirewallCmdAddArg(fw, fwrule, "!"); if (HAS_ENTRY_ITEM(&rule->p.ipv6HdrFilter.portData.dataDstPortEnd)) { if (printDataType(vars, @@ -2262,10 +2262,10 @@ ebtablesCreateRuleInstance(virFirewall *fw, &rule->p.ipv6HdrFilter.portData.dataDstPortEnd) < 0) return -1; - virFirewallRuleAddArgFormat(fw, fwrule, - "%s:%s", number, numberalt); + virFirewallCmdAddArgFormat(fw, fwrule, + "%s:%s", number, numberalt); } else { - virFirewallRuleAddArg(fw, fwrule, number); + virFirewallCmdAddArg(fw, fwrule, number); } } @@ -2277,8 +2277,8 @@ ebtablesCreateRuleInstance(virFirewall *fw, g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER; g_autofree char *r = NULL; - virFirewallRuleAddArg(fw, fwrule, - "--ip6-icmp-type"); + virFirewallCmdAddArg(fw, fwrule, + "--ip6-icmp-type"); if (HAS_ENTRY_ITEM(&rule->p.ipv6HdrFilter.dataICMPTypeStart)) { if (printDataType(vars, @@ -2335,17 +2335,17 @@ ebtablesCreateRuleInstance(virFirewall *fw, virBufferStrcat(&buf, numberalt, NULL); if (ENTRY_WANT_NEG_SIGN(&rule->p.ipv6HdrFilter.dataICMPTypeStart)) - virFirewallRuleAddArg(fw, fwrule, "!"); + virFirewallCmdAddArg(fw, fwrule, "!"); r = virBufferContentAndReset(&buf); - virFirewallRuleAddArg(fw, fwrule, r); + virFirewallCmdAddArg(fw, fwrule, r); } break; case VIR_NWFILTER_RULE_PROTOCOL_NONE: - fwrule = virFirewallAddRule(fw, VIR_FIREWALL_LAYER_ETHERNET, - "-t", "nat", "-A", chain, NULL); + fwrule = virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_ETHERNET, + "-t", "nat", "-A", chain, NULL); break; default: @@ -2370,8 +2370,8 @@ ebtablesCreateRuleInstance(virFirewall *fw, target = virNWFilterJumpTargetTypeToString(rule->action); } - virFirewallRuleAddArgList(fw, fwrule, - "-j", target, NULL); + virFirewallCmdAddArgList(fw, fwrule, + "-j", target, NULL); #undef INST_ITEM_RANGE #undef INST_ITEM_MASK @@ -2461,8 +2461,8 @@ ebtablesCreateTmpRootChainFW(virFirewall *fw, PRINT_ROOT_CHAIN(chain, chainPrefix, ifname); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_ETHERNET, - "-t", "nat", "-N", chain, NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_ETHERNET, + "-t", "nat", "-N", chain, NULL); } @@ -2476,11 +2476,11 @@ ebtablesLinkTmpRootChainFW(virFirewall *fw, PRINT_ROOT_CHAIN(chain, chainPrefix, ifname); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_ETHERNET, - "-t", "nat", "-A", - incoming ? EBTABLES_CHAIN_INCOMING : EBTABLES_CHAIN_OUTGOING, - incoming ? "-i" : "-o", - ifname, "-j", chain, NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_ETHERNET, + "-t", "nat", "-A", + incoming ? EBTABLES_CHAIN_INCOMING : EBTABLES_CHAIN_OUTGOING, + incoming ? "-i" : "-o", + ifname, "-j", chain, NULL); } @@ -2500,12 +2500,12 @@ _ebtablesRemoveRootChainFW(virFirewall *fw, PRINT_ROOT_CHAIN(chain, chainPrefix, ifname); - virFirewallAddRuleFull(fw, VIR_FIREWALL_LAYER_ETHERNET, - true, NULL, NULL, - "-t", "nat", "-F", chain, NULL); - virFirewallAddRuleFull(fw, VIR_FIREWALL_LAYER_ETHERNET, - true, NULL, NULL, - "-t", "nat", "-X", chain, NULL); + virFirewallAddCmdFull(fw, VIR_FIREWALL_LAYER_ETHERNET, + true, NULL, NULL, + "-t", "nat", "-F", chain, NULL); + virFirewallAddCmdFull(fw, VIR_FIREWALL_LAYER_ETHERNET, + true, NULL, NULL, + "-t", "nat", "-X", chain, NULL); } @@ -2543,12 +2543,12 @@ _ebtablesUnlinkRootChainFW(virFirewall *fw, PRINT_ROOT_CHAIN(chain, chainPrefix, ifname); - virFirewallAddRuleFull(fw, VIR_FIREWALL_LAYER_ETHERNET, - true, NULL, NULL, - "-t", "nat", "-D", - incoming ? EBTABLES_CHAIN_INCOMING : EBTABLES_CHAIN_OUTGOING, - incoming ? "-i" : "-o", - ifname, "-j", chain, NULL); + virFirewallAddCmdFull(fw, VIR_FIREWALL_LAYER_ETHERNET, + true, NULL, NULL, + "-t", "nat", "-D", + incoming ? EBTABLES_CHAIN_INCOMING : EBTABLES_CHAIN_OUTGOING, + incoming ? "-i" : "-o", + ifname, "-j", chain, NULL); } @@ -2577,41 +2577,41 @@ ebtablesCreateTmpSubChainFW(virFirewall *fw, char rootchain[MAX_CHAINNAME_LENGTH], chain[MAX_CHAINNAME_LENGTH]; char chainPrefix = incoming ? CHAINPREFIX_HOST_IN_TEMP : CHAINPREFIX_HOST_OUT_TEMP; - virFirewallRule *fwrule; + virFirewallCmd *fwrule; PRINT_ROOT_CHAIN(rootchain, chainPrefix, ifname); PRINT_CHAIN(chain, chainPrefix, ifname, (filtername) ? filtername : l3_protocols[protoidx].val); - virFirewallAddRuleFull(fw, VIR_FIREWALL_LAYER_ETHERNET, - true, NULL, NULL, - "-t", "nat", "-F", chain, NULL); - virFirewallAddRuleFull(fw, VIR_FIREWALL_LAYER_ETHERNET, - true, NULL, NULL, - "-t", "nat", "-X", chain, NULL); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_ETHERNET, - "-t", "nat", "-N", chain, NULL); + virFirewallAddCmdFull(fw, VIR_FIREWALL_LAYER_ETHERNET, + true, NULL, NULL, + "-t", "nat", "-F", chain, NULL); + virFirewallAddCmdFull(fw, VIR_FIREWALL_LAYER_ETHERNET, + true, NULL, NULL, + "-t", "nat", "-X", chain, NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_ETHERNET, + "-t", "nat", "-N", chain, NULL); - fwrule = virFirewallAddRule(fw, VIR_FIREWALL_LAYER_ETHERNET, - "-t", "nat", "-A", rootchain, NULL); + fwrule = virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_ETHERNET, + "-t", "nat", "-A", rootchain, NULL); switch ((int)protoidx) { case L2_PROTO_MAC_IDX: break; case L2_PROTO_STP_IDX: - virFirewallRuleAddArgList(fw, fwrule, - "-d", NWFILTER_MAC_BGA, NULL); + virFirewallCmdAddArgList(fw, fwrule, + "-d", NWFILTER_MAC_BGA, NULL); break; default: - virFirewallRuleAddArg(fw, fwrule, "-p"); - virFirewallRuleAddArgFormat(fw, fwrule, - "0x%04x", - l3_protocols[protoidx].attr); + virFirewallCmdAddArg(fw, fwrule, "-p"); + virFirewallCmdAddArgFormat(fw, fwrule, + "0x%04x", + l3_protocols[protoidx].attr); break; } - virFirewallRuleAddArgList(fw, fwrule, - "-j", chain, NULL); + virFirewallCmdAddArgList(fw, fwrule, + "-j", chain, NULL); } @@ -2636,16 +2636,16 @@ ebtablesRemoveSubChainsQuery(virFirewall *fw, if (tmp[0] == chainprefixes[j] && tmp[1] == '-') { VIR_DEBUG("Processing chain '%s'", tmp); - virFirewallAddRuleFull(fw, layer, - false, ebtablesRemoveSubChainsQuery, - (void *)chainprefixes, - "-t", "nat", "-L", tmp, NULL); - virFirewallAddRuleFull(fw, layer, - true, NULL, NULL, - "-t", "nat", "-F", tmp, NULL); - virFirewallAddRuleFull(fw, layer, - true, NULL, NULL, - "-t", "nat", "-X", tmp, NULL); + virFirewallAddCmdFull(fw, layer, + false, ebtablesRemoveSubChainsQuery, + (void *)chainprefixes, + "-t", "nat", "-L", tmp, NULL); + virFirewallAddCmdFull(fw, layer, + true, NULL, NULL, + "-t", "nat", "-F", tmp, NULL); + virFirewallAddCmdFull(fw, layer, + true, NULL, NULL, + "-t", "nat", "-X", tmp, NULL); } } } @@ -2664,10 +2664,10 @@ _ebtablesRemoveSubChainsFW(virFirewall *fw, for (i = 0; chainprefixes[i] != 0; i++) { PRINT_ROOT_CHAIN(rootchain, chainprefixes[i], ifname); - virFirewallAddRuleFull(fw, VIR_FIREWALL_LAYER_ETHERNET, - false, ebtablesRemoveSubChainsQuery, - (void *)chainprefixes, - "-t", "nat", "-L", rootchain, NULL); + virFirewallAddCmdFull(fw, VIR_FIREWALL_LAYER_ETHERNET, + false, ebtablesRemoveSubChainsQuery, + (void *)chainprefixes, + "-t", "nat", "-L", rootchain, NULL); } } @@ -2706,8 +2706,8 @@ ebtablesRenameTmpSubChainFW(virFirewall *fw, PRINT_ROOT_CHAIN(chain, chainPrefix, ifname); } - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_ETHERNET, - "-t", "nat", "-E", tmpchain, chain, NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_ETHERNET, + "-t", "nat", "-E", tmpchain, chain, NULL); } static void @@ -2748,18 +2748,18 @@ ebtablesRenameTmpSubAndRootChainsQuery(virFirewall *fw, else newchain[0] = CHAINPREFIX_HOST_OUT; VIR_DEBUG("Renaming chain '%s' to '%s'", tmp, newchain); - virFirewallAddRuleFull(fw, layer, - false, ebtablesRenameTmpSubAndRootChainsQuery, - NULL, - "-t", "nat", "-L", tmp, NULL); - virFirewallAddRuleFull(fw, layer, - true, NULL, NULL, - "-t", "nat", "-F", newchain, NULL); - virFirewallAddRuleFull(fw, layer, - true, NULL, NULL, - "-t", "nat", "-X", newchain, NULL); - virFirewallAddRule(fw, layer, - "-t", "nat", "-E", tmp, newchain, NULL); + virFirewallAddCmdFull(fw, layer, + false, ebtablesRenameTmpSubAndRootChainsQuery, + NULL, + "-t", "nat", "-L", tmp, NULL); + virFirewallAddCmdFull(fw, layer, + true, NULL, NULL, + "-t", "nat", "-F", newchain, NULL); + virFirewallAddCmdFull(fw, layer, + true, NULL, NULL, + "-t", "nat", "-X", newchain, NULL); + virFirewallAddCmd(fw, layer, + "-t", "nat", "-E", tmp, newchain, NULL); } return 0; @@ -2779,10 +2779,10 @@ ebtablesRenameTmpSubAndRootChainsFW(virFirewall *fw, }; for (i = 0; chains[i] != 0; i++) { PRINT_ROOT_CHAIN(rootchain, chains[i], ifname); - virFirewallAddRuleFull(fw, VIR_FIREWALL_LAYER_ETHERNET, - false, ebtablesRenameTmpSubAndRootChainsQuery, - NULL, - "-t", "nat", "-L", rootchain, NULL); + virFirewallAddCmdFull(fw, VIR_FIREWALL_LAYER_ETHERNET, + false, ebtablesRenameTmpSubAndRootChainsQuery, + NULL, + "-t", "nat", "-L", rootchain, NULL); } ebtablesRenameTmpRootChainFW(fw, true, ifname); @@ -2835,21 +2835,21 @@ ebtablesApplyBasicRules(const char *ifname, ebtablesCreateTmpRootChainFW(fw, true, ifname); PRINT_ROOT_CHAIN(chain, chainPrefix, ifname); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_ETHERNET, - "-t", "nat", "-A", chain, - "-s", "!", macaddr_str, - "-j", "DROP", NULL); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_ETHERNET, - "-t", "nat", "-A", chain, - "-p", "IPv4", - "-j", "ACCEPT", NULL); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_ETHERNET, - "-t", "nat", "-A", chain, - "-p", "ARP", - "-j", "ACCEPT", NULL); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_ETHERNET, - "-t", "nat", "-A", chain, - "-j", "DROP", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_ETHERNET, + "-t", "nat", "-A", chain, + "-s", "!", macaddr_str, + "-j", "DROP", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_ETHERNET, + "-t", "nat", "-A", chain, + "-p", "IPv4", + "-j", "ACCEPT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_ETHERNET, + "-t", "nat", "-A", chain, + "-p", "ARP", + "-j", "ACCEPT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_ETHERNET, + "-t", "nat", "-A", chain, + "-j", "DROP", NULL); ebtablesLinkTmpRootChainFW(fw, true, ifname); ebtablesRenameTmpRootChainFW(fw, true, ifname); @@ -2908,16 +2908,16 @@ ebtablesApplyDHCPOnlyRules(const char *ifname, PRINT_ROOT_CHAIN(chain_in, CHAINPREFIX_HOST_IN_TEMP, ifname); PRINT_ROOT_CHAIN(chain_out, CHAINPREFIX_HOST_OUT_TEMP, ifname); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_ETHERNET, - "-t", "nat", "-A", chain_in, - "-s", macaddr_str, - "-p", "ipv4", "--ip-protocol", "udp", - "--ip-sport", "68", "--ip-dport", "67", - "-j", "ACCEPT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_ETHERNET, + "-t", "nat", "-A", chain_in, + "-s", macaddr_str, + "-p", "ipv4", "--ip-protocol", "udp", + "--ip-sport", "68", "--ip-dport", "67", + "-j", "ACCEPT", NULL); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_ETHERNET, - "-t", "nat", "-A", chain_in, - "-j", "DROP", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_ETHERNET, + "-t", "nat", "-A", chain_in, + "-j", "DROP", NULL); num_dhcpsrvrs = (dhcpsrvrs != NULL) ? virNWFilterVarValueGetCardinality(dhcpsrvrs) @@ -2936,20 +2936,20 @@ ebtablesApplyDHCPOnlyRules(const char *ifname, */ for (ctr = 0; ctr < 2; ctr++) { if (dhcpserver) - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_ETHERNET, - "-t", "nat", "-A", chain_out, - "-d", (ctr == 0) ? macaddr_str : "ff:ff:ff:ff:ff:ff", - "-p", "ipv4", "--ip-protocol", "udp", - "--ip-src", dhcpserver, - "--ip-sport", "67", "--ip-dport", "68", - "-j", "ACCEPT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_ETHERNET, + "-t", "nat", "-A", chain_out, + "-d", (ctr == 0) ? macaddr_str : "ff:ff:ff:ff:ff:ff", + "-p", "ipv4", "--ip-protocol", "udp", + "--ip-src", dhcpserver, + "--ip-sport", "67", "--ip-dport", "68", + "-j", "ACCEPT", NULL); else - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_ETHERNET, - "-t", "nat", "-A", chain_out, - "-d", (ctr == 0) ? macaddr_str : "ff:ff:ff:ff:ff:ff", - "-p", "ipv4", "--ip-protocol", "udp", - "--ip-sport", "67", "--ip-dport", "68", - "-j", "ACCEPT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_ETHERNET, + "-t", "nat", "-A", chain_out, + "-d", (ctr == 0) ? macaddr_str : "ff:ff:ff:ff:ff:ff", + "-p", "ipv4", "--ip-protocol", "udp", + "--ip-sport", "67", "--ip-dport", "68", + "-j", "ACCEPT", NULL); } idx++; @@ -2958,9 +2958,9 @@ ebtablesApplyDHCPOnlyRules(const char *ifname, break; } - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_ETHERNET, - "-t", "nat", "-A", chain_out, - "-j", "DROP", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_ETHERNET, + "-t", "nat", "-A", chain_out, + "-j", "DROP", NULL); ebtablesLinkTmpRootChainFW(fw, true, ifname); ebtablesLinkTmpRootChainFW(fw, false, ifname); @@ -3008,13 +3008,13 @@ ebtablesApplyDropAllRules(const char *ifname) PRINT_ROOT_CHAIN(chain_in, CHAINPREFIX_HOST_IN_TEMP, ifname); PRINT_ROOT_CHAIN(chain_out, CHAINPREFIX_HOST_OUT_TEMP, ifname); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_ETHERNET, - "-t", "nat", "-A", chain_in, - "-j", "DROP", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_ETHERNET, + "-t", "nat", "-A", chain_in, + "-j", "DROP", NULL); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_ETHERNET, - "-t", "nat", "-A", chain_out, - "-j", "DROP", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_ETHERNET, + "-t", "nat", "-A", chain_out, + "-j", "DROP", NULL); ebtablesLinkTmpRootChainFW(fw, true, ifname); ebtablesLinkTmpRootChainFW(fw, false, ifname); diff --git a/src/util/virebtables.c b/src/util/virebtables.c index a1f5f7cf1e..cabcbb3e81 100644 --- a/src/util/virebtables.c +++ b/src/util/virebtables.c @@ -81,17 +81,17 @@ ebtablesAddForwardPolicyReject(ebtablesContext *ctx) g_autoptr(virFirewall) fw = virFirewallNew(); virFirewallStartTransaction(fw, VIR_FIREWALL_TRANSACTION_IGNORE_ERRORS); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_ETHERNET, - "--new-chain", ctx->chain, - NULL); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_ETHERNET, - "--insert", "FORWARD", - "--jump", ctx->chain, NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_ETHERNET, + "--new-chain", ctx->chain, + NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_ETHERNET, + "--insert", "FORWARD", + "--jump", ctx->chain, NULL); virFirewallStartTransaction(fw, 0); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_ETHERNET, - "-P", ctx->chain, "DROP", - NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_ETHERNET, + "-P", ctx->chain, "DROP", + NULL); return virFirewallApply(fw); } @@ -109,13 +109,13 @@ ebtablesForwardAllowIn(ebtablesContext *ctx, g_autoptr(virFirewall) fw = virFirewallNew(); virFirewallStartTransaction(fw, 0); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_ETHERNET, - action == ADD ? "--insert" : "--delete", - ctx->chain, - "--in-interface", iface, - "--source", macaddr, - "--jump", "ACCEPT", - NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_ETHERNET, + action == ADD ? "--insert" : "--delete", + ctx->chain, + "--in-interface", iface, + "--source", macaddr, + "--jump", "ACCEPT", + NULL); return virFirewallApply(fw); } diff --git a/src/util/virfirewall.c b/src/util/virfirewall.c index 30e73f603e..902cb8e445 100644 --- a/src/util/virfirewall.c +++ b/src/util/virfirewall.c @@ -45,7 +45,7 @@ VIR_ENUM_IMPL(virFirewallLayerCommand, IP6TABLES, ); -struct _virFirewallRule { +struct _virFirewallCmd { virFirewallLayer layer; virFirewallQueryCallback queryCB; @@ -62,10 +62,10 @@ struct _virFirewallGroup { unsigned int rollbackFlags; size_t naction; - virFirewallRule **action; + virFirewallCmd **action; size_t nrollback; - virFirewallRule **rollback; + virFirewallCmd **rollback; bool addingRollback; }; @@ -79,7 +79,7 @@ struct _virFirewall { size_t currentGroup; }; -static virMutex ruleLock = VIR_MUTEX_INITIALIZER; +static virMutex fwCmdLock = VIR_MUTEX_INITIALIZER; static virFirewallGroup * virFirewallGroupNew(void) @@ -107,17 +107,17 @@ virFirewall *virFirewallNew(void) static void -virFirewallRuleFree(virFirewallRule *rule) +virFirewallCmdFree(virFirewallCmd *fwCmd) { size_t i; - if (!rule) + if (!fwCmd) return; - for (i = 0; i < rule->argsLen; i++) - g_free(rule->args[i]); - g_free(rule->args); - g_free(rule); + for (i = 0; i < fwCmd->argsLen; i++) + g_free(fwCmd->args[i]); + g_free(fwCmd->args); + g_free(fwCmd); } @@ -130,11 +130,11 @@ virFirewallGroupFree(virFirewallGroup *group) return; for (i = 0; i < group->naction; i++) - virFirewallRuleFree(group->action[i]); + virFirewallCmdFree(group->action[i]); g_free(group->action); for (i = 0; i < group->nrollback; i++) - virFirewallRuleFree(group->rollback[i]); + virFirewallCmdFree(group->rollback[i]); g_free(group->rollback); g_free(group); @@ -167,9 +167,9 @@ void virFirewallFree(virFirewall *firewall) return; \ } while (0) -#define VIR_FIREWALL_RULE_RETURN_IF_ERROR(firewall, rule)\ +#define VIR_FIREWALL_CMD_RETURN_IF_ERROR(firewall, fwCmd)\ do { \ - if (!firewall || firewall->err || !rule) \ + if (!firewall || firewall->err || !fwCmd) \ return; \ } while (0) @@ -179,22 +179,22 @@ void virFirewallFree(virFirewall *firewall) return NULL; \ } while (0) -#define ADD_ARG(rule, str) \ +#define ADD_ARG(fwCmd, str) \ do { \ - VIR_RESIZE_N(rule->args, rule->argsAlloc, rule->argsLen, 1); \ - rule->args[rule->argsLen++] = g_strdup(str); \ + VIR_RESIZE_N(fwCmd->args, fwCmd->argsAlloc, fwCmd->argsLen, 1); \ + fwCmd->args[fwCmd->argsLen++] = g_strdup(str); \ } while (0) -static virFirewallRule * -virFirewallAddRuleFullV(virFirewall *firewall, - virFirewallLayer layer, - bool ignoreErrors, - virFirewallQueryCallback cb, - void *opaque, - va_list args) +static virFirewallCmd * +virFirewallAddCmdFullV(virFirewall *firewall, + virFirewallLayer layer, + bool ignoreErrors, + virFirewallQueryCallback cb, + void *opaque, + va_list args) { virFirewallGroup *group; - virFirewallRule *rule; + virFirewallCmd *fwCmd; char *str; VIR_FIREWALL_RETURN_NULL_IF_ERROR(firewall); @@ -206,43 +206,43 @@ virFirewallAddRuleFullV(virFirewall *firewall, group = firewall->groups[firewall->currentGroup]; - rule = g_new0(virFirewallRule, 1); + fwCmd = g_new0(virFirewallCmd, 1); - rule->layer = layer; - rule->queryCB = cb; - rule->queryOpaque = opaque; - rule->ignoreErrors = ignoreErrors; + fwCmd->layer = layer; + fwCmd->queryCB = cb; + fwCmd->queryOpaque = opaque; + fwCmd->ignoreErrors = ignoreErrors; - switch (rule->layer) { + switch (fwCmd->layer) { case VIR_FIREWALL_LAYER_ETHERNET: - ADD_ARG(rule, "--concurrent"); + ADD_ARG(fwCmd, "--concurrent"); break; case VIR_FIREWALL_LAYER_IPV4: - ADD_ARG(rule, "-w"); + ADD_ARG(fwCmd, "-w"); break; case VIR_FIREWALL_LAYER_IPV6: - ADD_ARG(rule, "-w"); + ADD_ARG(fwCmd, "-w"); break; case VIR_FIREWALL_LAYER_LAST: break; } while ((str = va_arg(args, char *)) != NULL) - ADD_ARG(rule, str); + ADD_ARG(fwCmd, str); if (group->addingRollback) { - VIR_APPEND_ELEMENT_COPY(group->rollback, group->nrollback, rule); + VIR_APPEND_ELEMENT_COPY(group->rollback, group->nrollback, fwCmd); } else { - VIR_APPEND_ELEMENT_COPY(group->action, group->naction, rule); + VIR_APPEND_ELEMENT_COPY(group->action, group->naction, fwCmd); } - return rule; + return fwCmd; } /** - * virFirewallAddRuleFull: + * virFirewallAddCmdFull: * @firewall: firewall ruleset to add to * @layer: the firewall layer to change * @ignoreErrors: true to ignore failure of the command @@ -253,7 +253,7 @@ virFirewallAddRuleFullV(virFirewall *firewall, * Add any type of rule to the firewall ruleset. Any output * generated by the addition will be fed into the query * callback @cb. This callback is permitted to create new - * rules by invoking the virFirewallAddRule method, but + * rules by invoking the virFirewallAddCmd method, but * is not permitted to start new transactions. * * If @ignoreErrors is set to TRUE, then any failure of @@ -263,31 +263,31 @@ virFirewallAddRuleFullV(virFirewall *firewall, * * Returns the new rule */ -virFirewallRule *virFirewallAddRuleFull(virFirewall *firewall, - virFirewallLayer layer, - bool ignoreErrors, - virFirewallQueryCallback cb, - void *opaque, - ...) +virFirewallCmd *virFirewallAddCmdFull(virFirewall *firewall, + virFirewallLayer layer, + bool ignoreErrors, + virFirewallQueryCallback cb, + void *opaque, + ...) { - virFirewallRule *rule; + virFirewallCmd *fwCmd; va_list args; va_start(args, opaque); - rule = virFirewallAddRuleFullV(firewall, layer, ignoreErrors, cb, opaque, args); + fwCmd = virFirewallAddCmdFullV(firewall, layer, ignoreErrors, cb, opaque, args); va_end(args); - return rule; + return fwCmd; } /** - * virFirewallRemoveRule: + * virFirewallRemoveCmd: * @firewall: firewall ruleset to remove from * @rule: the rule to remove * * Remove a rule from the current transaction */ -void virFirewallRemoveRule(virFirewall *firewall, - virFirewallRule *rule) +void virFirewallRemoveCmd(virFirewall *firewall, + virFirewallCmd *fwCmd) { size_t i; virFirewallGroup *group; @@ -306,21 +306,21 @@ void virFirewallRemoveRule(virFirewall *firewall, if (group->addingRollback) { for (i = 0; i < group->nrollback; i++) { - if (group->rollback[i] == rule) { + if (group->rollback[i] == fwCmd) { VIR_DELETE_ELEMENT(group->rollback, i, group->nrollback); - virFirewallRuleFree(rule); + virFirewallCmdFree(fwCmd); break; } } } else { for (i = 0; i < group->naction; i++) { - if (group->action[i] == rule) { + if (group->action[i] == fwCmd) { VIR_DELETE_ELEMENT(group->action, i, group->naction); - virFirewallRuleFree(rule); + virFirewallCmdFree(fwCmd); return; } } @@ -328,45 +328,45 @@ void virFirewallRemoveRule(virFirewall *firewall, } -void virFirewallRuleAddArg(virFirewall *firewall, - virFirewallRule *rule, - const char *arg) +void virFirewallCmdAddArg(virFirewall *firewall, + virFirewallCmd *fwCmd, + const char *arg) { - VIR_FIREWALL_RULE_RETURN_IF_ERROR(firewall, rule); + VIR_FIREWALL_CMD_RETURN_IF_ERROR(firewall, fwCmd); - ADD_ARG(rule, arg); + ADD_ARG(fwCmd, arg); return; } -void virFirewallRuleAddArgFormat(virFirewall *firewall, - virFirewallRule *rule, - const char *fmt, ...) +void virFirewallCmdAddArgFormat(virFirewall *firewall, + virFirewallCmd *fwCmd, + const char *fmt, ...) { g_autofree char *arg = NULL; va_list list; - VIR_FIREWALL_RULE_RETURN_IF_ERROR(firewall, rule); + VIR_FIREWALL_CMD_RETURN_IF_ERROR(firewall, fwCmd); va_start(list, fmt); arg = g_strdup_vprintf(fmt, list); va_end(list); - ADD_ARG(rule, arg); + ADD_ARG(fwCmd, arg); return; } -void virFirewallRuleAddArgSet(virFirewall *firewall, - virFirewallRule *rule, - const char *const *args) +void virFirewallCmdAddArgSet(virFirewall *firewall, + virFirewallCmd *fwCmd, + const char *const *args) { - VIR_FIREWALL_RULE_RETURN_IF_ERROR(firewall, rule); + VIR_FIREWALL_CMD_RETURN_IF_ERROR(firewall, fwCmd); while (*args) { - ADD_ARG(rule, *args); + ADD_ARG(fwCmd, *args); args++; } @@ -374,19 +374,19 @@ void virFirewallRuleAddArgSet(virFirewall *firewall, } -void virFirewallRuleAddArgList(virFirewall *firewall, - virFirewallRule *rule, - ...) +void virFirewallCmdAddArgList(virFirewall *firewall, + virFirewallCmd *fwCmd, + ...) { va_list list; const char *str; - VIR_FIREWALL_RULE_RETURN_IF_ERROR(firewall, rule); + VIR_FIREWALL_CMD_RETURN_IF_ERROR(firewall, fwCmd); - va_start(list, rule); + va_start(list, fwCmd); while ((str = va_arg(list, char *)) != NULL) - ADD_ARG(rule, str); + ADD_ARG(fwCmd, str); va_end(list); @@ -394,11 +394,11 @@ void virFirewallRuleAddArgList(virFirewall *firewall, } -size_t virFirewallRuleGetArgCount(virFirewallRule *rule) +size_t virFirewallCmdGetArgCount(virFirewallCmd *fwCmd) { - if (!rule) + if (!fwCmd) return 0; - return rule->argsLen; + return fwCmd->argsLen; } @@ -462,16 +462,16 @@ void virFirewallStartRollback(virFirewall *firewall, char * -virFirewallRuleToString(const char *cmd, - virFirewallRule *rule) +virFirewallCmdToString(const char *cmd, + virFirewallCmd *fwCmd) { g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER; size_t i; virBufferAdd(&buf, cmd, -1); - for (i = 0; i < rule->argsLen; i++) { + for (i = 0; i < fwCmd->argsLen; i++) { virBufferAddLit(&buf, " "); - virBufferAdd(&buf, rule->args[i], -1); + virBufferAdd(&buf, fwCmd->args[i], -1); } return virBufferContentAndReset(&buf); @@ -479,12 +479,12 @@ virFirewallRuleToString(const char *cmd, static int -virFirewallApplyRuleDirect(virFirewallRule *rule, - bool ignoreErrors, - char **output) +virFirewallApplyCmdDirect(virFirewallCmd *fwCmd, + bool ignoreErrors, + char **output) { size_t i; - const char *bin = virFirewallLayerCommandTypeToString(rule->layer); + const char *bin = virFirewallLayerCommandTypeToString(fwCmd->layer); g_autoptr(virCommand) cmd = NULL; g_autofree char *cmdStr = NULL; int status; @@ -493,17 +493,17 @@ virFirewallApplyRuleDirect(virFirewallRule *rule, if (!bin) { virReportError(VIR_ERR_INTERNAL_ERROR, _("Unknown firewall layer %1$d"), - rule->layer); + fwCmd->layer); return -1; } cmd = virCommandNewArgList(bin, NULL); - for (i = 0; i < rule->argsLen; i++) - virCommandAddArg(cmd, rule->args[i]); + for (i = 0; i < fwCmd->argsLen; i++) + virCommandAddArg(cmd, fwCmd->args[i]); cmdStr = virCommandToString(cmd, false); - VIR_INFO("Applying rule '%s'", NULLSTR(cmdStr)); + VIR_INFO("Running firewall command '%s'", NULLSTR(cmdStr)); virCommandSetOutputBuffer(cmd, output); virCommandSetErrorBuffer(cmd, &error); @@ -516,7 +516,7 @@ virFirewallApplyRuleDirect(virFirewallRule *rule, VIR_DEBUG("Ignoring error running command"); } else { virReportError(VIR_ERR_INTERNAL_ERROR, - _("Failed to apply firewall rules %1$s: %2$s"), + _("Failed to run firewall command %1$s: %2$s"), NULLSTR(cmdStr), NULLSTR(error)); VIR_FREE(*output); return -1; @@ -528,30 +528,30 @@ virFirewallApplyRuleDirect(virFirewallRule *rule, static int -virFirewallApplyRule(virFirewall *firewall, - virFirewallRule *rule, - bool ignoreErrors) +virFirewallApplyCmd(virFirewall *firewall, + virFirewallCmd *fwCmd, + bool ignoreErrors) { g_autofree char *output = NULL; g_auto(GStrv) lines = NULL; - if (rule->ignoreErrors) - ignoreErrors = rule->ignoreErrors; + if (fwCmd->ignoreErrors) + ignoreErrors = fwCmd->ignoreErrors; - if (virFirewallApplyRuleDirect(rule, ignoreErrors, &output) < 0) + if (virFirewallApplyCmdDirect(fwCmd, ignoreErrors, &output) < 0) return -1; - if (rule->queryCB && output) { + if (fwCmd->queryCB && output) { if (!(lines = g_strsplit(output, "\n", -1))) return -1; - VIR_DEBUG("Invoking query %p with '%s'", rule->queryCB, output); - if (rule->queryCB(firewall, rule->layer, (const char *const *)lines, rule->queryOpaque) < 0) + VIR_DEBUG("Invoking query %p with '%s'", fwCmd->queryCB, output); + if (fwCmd->queryCB(firewall, fwCmd->layer, (const char *const *)lines, fwCmd->queryOpaque) < 0) return -1; if (firewall->err) { virReportSystemError(firewall->err, "%s", - _("Unable to create rule")); + _("Unable to create firewall command")); return -1; } @@ -573,9 +573,9 @@ virFirewallApplyGroup(virFirewall *firewall, firewall->currentGroup = idx; group->addingRollback = false; for (i = 0; i < group->naction; i++) { - if (virFirewallApplyRule(firewall, - group->action[i], - ignoreErrors) < 0) + if (virFirewallApplyCmd(firewall, + group->action[i], + ignoreErrors) < 0) return -1; } return 0; @@ -592,11 +592,8 @@ virFirewallRollbackGroup(virFirewall *firewall, VIR_INFO("Starting rollback for group %p", group); firewall->currentGroup = idx; group->addingRollback = true; - for (i = 0; i < group->nrollback; i++) { - ignore_value(virFirewallApplyRule(firewall, - group->rollback[i], - true)); - } + for (i = 0; i < group->nrollback; i++) + ignore_value(virFirewallApplyCmd(firewall, group->rollback[i], true)); } @@ -604,7 +601,7 @@ int virFirewallApply(virFirewall *firewall) { size_t i, j; - VIR_LOCK_GUARD lock = virLockGuardLock(&ruleLock); + VIR_LOCK_GUARD lock = virLockGuardLock(&fwCmdLock); if (!firewall || firewall->err) { int err = EINVAL; @@ -612,7 +609,7 @@ virFirewallApply(virFirewall *firewall) if (firewall) err = firewall->err; - virReportSystemError(err, "%s", _("Unable to create rule")); + virReportSystemError(err, "%s", _("Unable to create firewall command")); return -1; } diff --git a/src/util/virfirewall.h b/src/util/virfirewall.h index 187748b2bf..956bf0e2bf 100644 --- a/src/util/virfirewall.h +++ b/src/util/virfirewall.h @@ -24,7 +24,7 @@ typedef struct _virFirewall virFirewall; -typedef struct _virFirewallRule virFirewallRule; +typedef struct _virFirewallCmd virFirewallCmd; typedef enum { VIR_FIREWALL_LAYER_ETHERNET, @@ -39,7 +39,7 @@ virFirewall *virFirewallNew(void); void virFirewallFree(virFirewall *firewall); /** - * virFirewallAddRule: + * virFirewallAddCmd: * @firewall: firewall ruleset to add to * @layer: the firewall layer to change * @...: NULL terminated list of strings for the rule @@ -48,49 +48,49 @@ void virFirewallFree(virFirewall *firewall); * * Returns the new rule */ -#define virFirewallAddRule(firewall, layer, ...) \ - virFirewallAddRuleFull(firewall, layer, false, NULL, NULL, __VA_ARGS__) +#define virFirewallAddCmd(firewall, layer, ...) \ + virFirewallAddCmdFull(firewall, layer, false, NULL, NULL, __VA_ARGS__) typedef int (*virFirewallQueryCallback)(virFirewall *firewall, virFirewallLayer layer, const char *const *lines, void *opaque); -virFirewallRule *virFirewallAddRuleFull(virFirewall *firewall, - virFirewallLayer layer, - bool ignoreErrors, - virFirewallQueryCallback cb, - void *opaque, - ...) +virFirewallCmd *virFirewallAddCmdFull(virFirewall *firewall, + virFirewallLayer layer, + bool ignoreErrors, + virFirewallQueryCallback cb, + void *opaque, + ...) G_GNUC_NULL_TERMINATED; -void virFirewallRemoveRule(virFirewall *firewall, - virFirewallRule *rule); +void virFirewallRemoveCmd(virFirewall *firewall, + virFirewallCmd *rule); -void virFirewallRuleAddArg(virFirewall *firewall, - virFirewallRule *rule, - const char *arg) +void virFirewallCmdAddArg(virFirewall *firewall, + virFirewallCmd *rule, + const char *arg) ATTRIBUTE_NONNULL(3); -void virFirewallRuleAddArgFormat(virFirewall *firewall, - virFirewallRule *rule, - const char *fmt, ...) +void virFirewallCmdAddArgFormat(virFirewall *firewall, + virFirewallCmd *rule, + const char *fmt, ...) ATTRIBUTE_NONNULL(3) G_GNUC_PRINTF(3, 4); -void virFirewallRuleAddArgSet(virFirewall *firewall, - virFirewallRule *rule, - const char *const *args) +void virFirewallCmdAddArgSet(virFirewall *firewall, + virFirewallCmd *rule, + const char *const *args) ATTRIBUTE_NONNULL(3); -void virFirewallRuleAddArgList(virFirewall *firewall, - virFirewallRule *rule, - ...) +void virFirewallCmdAddArgList(virFirewall *firewall, + virFirewallCmd *rule, + ...) G_GNUC_NULL_TERMINATED; -size_t virFirewallRuleGetArgCount(virFirewallRule *rule); +size_t virFirewallCmdGetArgCount(virFirewallCmd *rule); -char *virFirewallRuleToString(const char *cmd, - virFirewallRule *rule); +char *virFirewallCmdToString(const char *cmd, + virFirewallCmd *rule); typedef enum { /* Ignore all errors when applying rules, so no diff --git a/tests/virfirewalltest.c b/tests/virfirewalltest.c index e676a434c8..45bb67cb21 100644 --- a/tests/virfirewalltest.c +++ b/tests/virfirewalltest.c @@ -74,15 +74,15 @@ testFirewallSingleGroup(const void *opaque G_GNUC_UNUSED) virFirewallStartTransaction(fw, 0); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "INPUT", - "--source", "192.168.122.1", - "--jump", "ACCEPT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "INPUT", + "--source", "192.168.122.1", + "--jump", "ACCEPT", NULL); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "INPUT", - "--source", "!192.168.122.1", - "--jump", "REJECT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "INPUT", + "--source", "!192.168.122.1", + "--jump", "REJECT", NULL); if (virFirewallApply(fw) < 0) return -1; @@ -107,28 +107,28 @@ testFirewallRemoveRule(const void *opaque G_GNUC_UNUSED) const char *expected = IPTABLES " -w -A INPUT --source 192.168.122.1 --jump ACCEPT\n" IPTABLES " -w -A INPUT --source '!192.168.122.1' --jump REJECT\n"; - virFirewallRule *fwrule; + virFirewallCmd *fwrule; g_autoptr(virCommandDryRunToken) dryRunToken = virCommandDryRunTokenNew(); virCommandSetDryRun(dryRunToken, &cmdbuf, false, false, NULL, NULL); virFirewallStartTransaction(fw, 0); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "INPUT", - "--source", "192.168.122.1", - "--jump", "ACCEPT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "INPUT", + "--source", "192.168.122.1", + "--jump", "ACCEPT", NULL); - fwrule = virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "INPUT", NULL); - virFirewallRuleAddArg(fw, fwrule, "--source"); - virFirewallRemoveRule(fw, fwrule); + fwrule = virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "INPUT", NULL); + virFirewallCmdAddArg(fw, fwrule, "--source"); + virFirewallRemoveCmd(fw, fwrule); - fwrule = virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "INPUT", NULL); - virFirewallRuleAddArg(fw, fwrule, "--source"); - virFirewallRuleAddArgFormat(fw, fwrule, "%s", "!192.168.122.1"); - virFirewallRuleAddArgList(fw, fwrule, "--jump", "REJECT", NULL); + fwrule = virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "INPUT", NULL); + virFirewallCmdAddArg(fw, fwrule, "--source"); + virFirewallCmdAddArgFormat(fw, fwrule, "%s", "!192.168.122.1"); + virFirewallCmdAddArgList(fw, fwrule, "--jump", "REJECT", NULL); if (virFirewallApply(fw) < 0) return -1; @@ -161,26 +161,26 @@ testFirewallManyGroups(const void *opaque G_GNUC_UNUSED) virFirewallStartTransaction(fw, 0); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "INPUT", - "--source", "192.168.122.1", - "--jump", "ACCEPT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "INPUT", + "--source", "192.168.122.1", + "--jump", "ACCEPT", NULL); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "INPUT", - "--source", "!192.168.122.1", - "--jump", "REJECT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "INPUT", + "--source", "!192.168.122.1", + "--jump", "REJECT", NULL); virFirewallStartTransaction(fw, 0); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "OUTPUT", - "--source", "192.168.122.1", - "--jump", "ACCEPT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "OUTPUT", + "--source", "192.168.122.1", + "--jump", "ACCEPT", NULL); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "OUTPUT", - "--jump", "DROP", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "OUTPUT", + "--jump", "DROP", NULL); if (virFirewallApply(fw) < 0) @@ -235,26 +235,26 @@ testFirewallIgnoreFailGroup(const void *opaque G_GNUC_UNUSED) virFirewallStartTransaction(fw, VIR_FIREWALL_TRANSACTION_IGNORE_ERRORS); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "INPUT", - "--source", "192.168.122.1", - "--jump", "ACCEPT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "INPUT", + "--source", "192.168.122.1", + "--jump", "ACCEPT", NULL); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "INPUT", - "--source", "192.168.122.255", - "--jump", "REJECT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "INPUT", + "--source", "192.168.122.255", + "--jump", "REJECT", NULL); virFirewallStartTransaction(fw, 0); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "OUTPUT", - "--source", "192.168.122.1", - "--jump", "ACCEPT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "OUTPUT", + "--source", "192.168.122.1", + "--jump", "ACCEPT", NULL); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "OUTPUT", - "--jump", "DROP", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "OUTPUT", + "--jump", "DROP", NULL); if (virFirewallApply(fw) < 0) @@ -288,25 +288,25 @@ testFirewallIgnoreFailRule(const void *opaque G_GNUC_UNUSED) virFirewallStartTransaction(fw, 0); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "INPUT", - "--source", "192.168.122.1", - "--jump", "ACCEPT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "INPUT", + "--source", "192.168.122.1", + "--jump", "ACCEPT", NULL); - virFirewallAddRuleFull(fw, VIR_FIREWALL_LAYER_IPV4, - true, NULL, NULL, - "-A", "INPUT", - "--source", "192.168.122.255", - "--jump", "REJECT", NULL); + virFirewallAddCmdFull(fw, VIR_FIREWALL_LAYER_IPV4, + true, NULL, NULL, + "-A", "INPUT", + "--source", "192.168.122.255", + "--jump", "REJECT", NULL); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "OUTPUT", - "--source", "192.168.122.1", - "--jump", "ACCEPT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "OUTPUT", + "--source", "192.168.122.1", + "--jump", "ACCEPT", NULL); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "OUTPUT", - "--jump", "DROP", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "OUTPUT", + "--jump", "DROP", NULL); if (virFirewallApply(fw) < 0) @@ -338,20 +338,20 @@ testFirewallNoRollback(const void *opaque G_GNUC_UNUSED) virFirewallStartTransaction(fw, 0); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "INPUT", - "--source", "192.168.122.1", - "--jump", "ACCEPT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "INPUT", + "--source", "192.168.122.1", + "--jump", "ACCEPT", NULL); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "INPUT", - "--source", "192.168.122.255", - "--jump", "REJECT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "INPUT", + "--source", "192.168.122.255", + "--jump", "REJECT", NULL); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "INPUT", - "--source", "!192.168.122.1", - "--jump", "REJECT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "INPUT", + "--source", "!192.168.122.1", + "--jump", "REJECT", NULL); if (virFirewallApply(fw) == 0) { fprintf(stderr, "Firewall apply unexpectedly worked\n"); @@ -386,37 +386,37 @@ testFirewallSingleRollback(const void *opaque G_GNUC_UNUSED) virFirewallStartTransaction(fw, 0); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "INPUT", - "--source", "192.168.122.1", - "--jump", "ACCEPT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "INPUT", + "--source", "192.168.122.1", + "--jump", "ACCEPT", NULL); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "INPUT", - "--source", "192.168.122.255", - "--jump", "REJECT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "INPUT", + "--source", "192.168.122.255", + "--jump", "REJECT", NULL); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "INPUT", - "--source", "!192.168.122.1", - "--jump", "REJECT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "INPUT", + "--source", "!192.168.122.1", + "--jump", "REJECT", NULL); virFirewallStartRollback(fw, 0); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-D", "INPUT", - "--source", "192.168.122.1", - "--jump", "ACCEPT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-D", "INPUT", + "--source", "192.168.122.1", + "--jump", "ACCEPT", NULL); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-D", "INPUT", - "--source", "192.168.122.255", - "--jump", "REJECT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-D", "INPUT", + "--source", "192.168.122.255", + "--jump", "REJECT", NULL); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-D", "INPUT", - "--source", "!192.168.122.1", - "--jump", "REJECT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-D", "INPUT", + "--source", "!192.168.122.1", + "--jump", "REJECT", NULL); if (virFirewallApply(fw) == 0) { fprintf(stderr, "Firewall apply unexpectedly worked\n"); @@ -450,41 +450,41 @@ testFirewallManyRollback(const void *opaque G_GNUC_UNUSED) virFirewallStartTransaction(fw, 0); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "INPUT", - "--source", "192.168.122.1", - "--jump", "ACCEPT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "INPUT", + "--source", "192.168.122.1", + "--jump", "ACCEPT", NULL); virFirewallStartRollback(fw, 0); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-D", "INPUT", - "--source", "192.168.122.1", - "--jump", "ACCEPT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-D", "INPUT", + "--source", "192.168.122.1", + "--jump", "ACCEPT", NULL); virFirewallStartTransaction(fw, 0); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "INPUT", - "--source", "192.168.122.255", - "--jump", "REJECT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "INPUT", + "--source", "192.168.122.255", + "--jump", "REJECT", NULL); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "INPUT", - "--source", "!192.168.122.1", - "--jump", "REJECT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "INPUT", + "--source", "!192.168.122.1", + "--jump", "REJECT", NULL); virFirewallStartRollback(fw, 0); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-D", "INPUT", - "--source", "192.168.122.255", - "--jump", "REJECT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-D", "INPUT", + "--source", "192.168.122.255", + "--jump", "REJECT", NULL); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-D", "INPUT", - "--source", "!192.168.122.1", - "--jump", "REJECT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-D", "INPUT", + "--source", "!192.168.122.1", + "--jump", "REJECT", NULL); if (virFirewallApply(fw) == 0) { fprintf(stderr, "Firewall apply unexpectedly worked\n"); @@ -522,67 +522,67 @@ testFirewallChainedRollback(const void *opaque G_GNUC_UNUSED) virFirewallStartTransaction(fw, 0); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "INPUT", - "--source", "192.168.122.1", - "--jump", "ACCEPT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "INPUT", + "--source", "192.168.122.1", + "--jump", "ACCEPT", NULL); virFirewallStartRollback(fw, 0); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-D", "INPUT", - "--source", "192.168.122.1", - "--jump", "ACCEPT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-D", "INPUT", + "--source", "192.168.122.1", + "--jump", "ACCEPT", NULL); virFirewallStartTransaction(fw, 0); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "INPUT", - "--source", "192.168.122.127", - "--jump", "REJECT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "INPUT", + "--source", "192.168.122.127", + "--jump", "REJECT", NULL); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "INPUT", - "--source", "!192.168.122.1", - "--jump", "REJECT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "INPUT", + "--source", "!192.168.122.1", + "--jump", "REJECT", NULL); virFirewallStartRollback(fw, 0); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-D", "INPUT", - "--source", "192.168.122.127", - "--jump", "REJECT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-D", "INPUT", + "--source", "192.168.122.127", + "--jump", "REJECT", NULL); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-D", "INPUT", - "--source", "!192.168.122.1", - "--jump", "REJECT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-D", "INPUT", + "--source", "!192.168.122.1", + "--jump", "REJECT", NULL); virFirewallStartTransaction(fw, 0); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "INPUT", - "--source", "192.168.122.255", - "--jump", "REJECT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "INPUT", + "--source", "192.168.122.255", + "--jump", "REJECT", NULL); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "INPUT", - "--source", "!192.168.122.1", - "--jump", "REJECT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "INPUT", + "--source", "!192.168.122.1", + "--jump", "REJECT", NULL); virFirewallStartRollback(fw, VIR_FIREWALL_ROLLBACK_INHERIT_PREVIOUS); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-D", "INPUT", - "--source", "192.168.122.255", - "--jump", "REJECT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-D", "INPUT", + "--source", "192.168.122.255", + "--jump", "REJECT", NULL); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-D", "INPUT", - "--source", "!192.168.122.1", - "--jump", "REJECT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-D", "INPUT", + "--source", "!192.168.122.1", + "--jump", "REJECT", NULL); if (virFirewallApply(fw) == 0) { fprintf(stderr, "Firewall apply unexpectedly worked\n"); @@ -656,10 +656,10 @@ testFirewallQueryCallback(virFirewall *fw, void *opaque G_GNUC_UNUSED) { size_t i; - virFirewallAddRule(fw, layer, - "-A", "INPUT", - "--source", "!192.168.122.129", - "--jump", "REJECT", NULL); + virFirewallAddCmd(fw, layer, + "-A", "INPUT", + "--source", "!192.168.122.129", + "--jump", "REJECT", NULL); for (i = 0; lines[i] != NULL; i++) { if (expectedLineNum >= G_N_ELEMENTS(expectedLines)) { @@ -703,46 +703,46 @@ testFirewallQuery(const void *opaque G_GNUC_UNUSED) virFirewallStartTransaction(fw, 0); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "INPUT", - "--source", "192.168.122.1", - "--jump", "ACCEPT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "INPUT", + "--source", "192.168.122.1", + "--jump", "ACCEPT", NULL); virFirewallStartTransaction(fw, 0); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "INPUT", - "--source", "192.168.122.127", - "--jump", "REJECT", NULL); - - virFirewallAddRuleFull(fw, VIR_FIREWALL_LAYER_IPV4, - false, - testFirewallQueryCallback, - NULL, - "-L", NULL); - virFirewallAddRuleFull(fw, VIR_FIREWALL_LAYER_IPV4, - false, - testFirewallQueryCallback, - NULL, + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "INPUT", + "--source", "192.168.122.127", + "--jump", "REJECT", NULL); + + virFirewallAddCmdFull(fw, VIR_FIREWALL_LAYER_IPV4, + false, + testFirewallQueryCallback, + NULL, + "-L", NULL); + virFirewallAddCmdFull(fw, VIR_FIREWALL_LAYER_IPV4, + false, + testFirewallQueryCallback, + NULL, "-t", "nat", "-L", NULL); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "INPUT", - "--source", "192.168.122.130", - "--jump", "REJECT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "INPUT", + "--source", "192.168.122.130", + "--jump", "REJECT", NULL); virFirewallStartTransaction(fw, 0); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "INPUT", - "--source", "192.168.122.128", - "--jump", "REJECT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "INPUT", + "--source", "192.168.122.128", + "--jump", "REJECT", NULL); - virFirewallAddRule(fw, VIR_FIREWALL_LAYER_IPV4, - "-A", "INPUT", - "--source", "!192.168.122.1", - "--jump", "REJECT", NULL); + virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, + "-A", "INPUT", + "--source", "!192.168.122.1", + "--jump", "REJECT", NULL); if (virFirewallApply(fw) < 0) return -1; -- 2.44.0
I had originally named these as VIR_NETFILTER_* because I assumed the same enum would eventually be used by our nftables backend as well as iptables. But it turns out that in most cases it's not possible to delete an nftables rule, so we just never used the enum anyway, so this patch is renaming the values to IPTABLES_ACTION_*, and taking advantage of the newly defined (via VIR_ENUM_DECL/IMPL) iptablesActionTypeToString() to replace all the ternary operators used to translate the enum into a string for the iptables commandline with iptablesActionTypeToString(). Signed-off-by: Laine Stump <laine@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> --- Change from V2: * add #include "virenum.h" removed from patch 01/27 src/network/network_iptables.c | 126 ++++++++++++++++++--------------- 1 file changed, 69 insertions(+), 57 deletions(-) diff --git a/src/network/network_iptables.c b/src/network/network_iptables.c index 5c16683cff..d7e749adf0 100644 --- a/src/network/network_iptables.c +++ b/src/network/network_iptables.c @@ -32,6 +32,7 @@ #include "virerror.h" #include "virlog.h" #include "virhash.h" +#include "virenum.h" #include "network_iptables.h" VIR_LOG_INIT("network.iptables"); @@ -45,10 +46,21 @@ VIR_LOG_INIT("network.iptables"); #define VIR_IPTABLES_FWD_X_CHAIN "LIBVIRT_FWX" #define VIR_IPTABLES_NAT_POSTROUTE_CHAIN "LIBVIRT_PRT" -enum { - VIR_NETFILTER_INSERT = 0, - VIR_NETFILTER_DELETE -}; +typedef enum { + IPTABLES_ACTION_INSERT, + IPTABLES_ACTION_APPEND, + IPTABLES_ACTION_DELETE, + + IPTABLES_ACTION_LAST +} iptablesAction; + +VIR_ENUM_DECL(iptablesAction); +VIR_ENUM_IMPL(iptablesAction, + IPTABLES_ACTION_LAST, + "--insert", + "--append", + "--delete", +); typedef struct { const char *parent; @@ -168,14 +180,14 @@ iptablesInput(virFirewall *fw, virFirewallLayer layer, const char *iface, int port, - int action, + iptablesAction action, int tcp) { g_autofree char *portstr = g_strdup_printf("%d", port); virFirewallAddCmd(fw, layer, "--table", "filter", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + iptablesActionTypeToString(action), VIR_IPTABLES_INPUT_CHAIN, "--in-interface", iface, "--protocol", tcp ? "tcp" : "udp", @@ -189,14 +201,14 @@ iptablesOutput(virFirewall *fw, virFirewallLayer layer, const char *iface, int port, - int action, + iptablesAction action, int tcp) { g_autofree char *portstr = g_strdup_printf("%d", port); virFirewallAddCmd(fw, layer, "--table", "filter", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + iptablesActionTypeToString(action), VIR_IPTABLES_OUTPUT_CHAIN, "--out-interface", iface, "--protocol", tcp ? "tcp" : "udp", @@ -220,7 +232,7 @@ iptablesAddTcpInput(virFirewall *fw, const char *iface, int port) { - iptablesInput(fw, layer, iface, port, VIR_NETFILTER_INSERT, 1); + iptablesInput(fw, layer, iface, port, IPTABLES_ACTION_INSERT, 1); } /** @@ -238,7 +250,7 @@ iptablesRemoveTcpInput(virFirewall *fw, const char *iface, int port) { - iptablesInput(fw, layer, iface, port, VIR_NETFILTER_DELETE, 1); + iptablesInput(fw, layer, iface, port, IPTABLES_ACTION_DELETE, 1); } /** @@ -256,7 +268,7 @@ iptablesAddUdpInput(virFirewall *fw, const char *iface, int port) { - iptablesInput(fw, layer, iface, port, VIR_NETFILTER_INSERT, 0); + iptablesInput(fw, layer, iface, port, IPTABLES_ACTION_INSERT, 0); } /** @@ -274,7 +286,7 @@ iptablesRemoveUdpInput(virFirewall *fw, const char *iface, int port) { - iptablesInput(fw, layer, iface, port, VIR_NETFILTER_DELETE, 0); + iptablesInput(fw, layer, iface, port, IPTABLES_ACTION_DELETE, 0); } /** @@ -292,7 +304,7 @@ iptablesAddTcpOutput(virFirewall *fw, const char *iface, int port) { - iptablesOutput(fw, layer, iface, port, VIR_NETFILTER_INSERT, 1); + iptablesOutput(fw, layer, iface, port, IPTABLES_ACTION_INSERT, 1); } /** @@ -310,7 +322,7 @@ iptablesRemoveTcpOutput(virFirewall *fw, const char *iface, int port) { - iptablesOutput(fw, layer, iface, port, VIR_NETFILTER_DELETE, 1); + iptablesOutput(fw, layer, iface, port, IPTABLES_ACTION_DELETE, 1); } /** @@ -328,7 +340,7 @@ iptablesAddUdpOutput(virFirewall *fw, const char *iface, int port) { - iptablesOutput(fw, layer, iface, port, VIR_NETFILTER_INSERT, 0); + iptablesOutput(fw, layer, iface, port, IPTABLES_ACTION_INSERT, 0); } /** @@ -346,7 +358,7 @@ iptablesRemoveUdpOutput(virFirewall *fw, const char *iface, int port) { - iptablesOutput(fw, layer, iface, port, VIR_NETFILTER_DELETE, 0); + iptablesOutput(fw, layer, iface, port, IPTABLES_ACTION_DELETE, 0); } @@ -359,7 +371,7 @@ iptablesForwardAllowOut(virFirewall *fw, unsigned int prefix, const char *iface, const char *physdev, - int action) + iptablesAction action) { g_autofree char *networkstr = NULL; virFirewallLayer layer = VIR_SOCKET_ADDR_FAMILY(netaddr) == AF_INET ? @@ -371,7 +383,7 @@ iptablesForwardAllowOut(virFirewall *fw, if (physdev && physdev[0]) virFirewallAddCmd(fw, layer, "--table", "filter", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + iptablesActionTypeToString(action), VIR_IPTABLES_FWD_OUT_CHAIN, "--source", networkstr, "--in-interface", iface, @@ -381,7 +393,7 @@ iptablesForwardAllowOut(virFirewall *fw, else virFirewallAddCmd(fw, layer, "--table", "filter", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + iptablesActionTypeToString(action), VIR_IPTABLES_FWD_OUT_CHAIN, "--source", networkstr, "--in-interface", iface, @@ -412,7 +424,7 @@ iptablesAddForwardAllowOut(virFirewall *fw, const char *physdev) { return iptablesForwardAllowOut(fw, netaddr, prefix, iface, physdev, - VIR_NETFILTER_INSERT); + IPTABLES_ACTION_INSERT); } /** @@ -436,7 +448,7 @@ iptablesRemoveForwardAllowOut(virFirewall *fw, const char *physdev) { return iptablesForwardAllowOut(fw, netaddr, prefix, iface, physdev, - VIR_NETFILTER_DELETE); + IPTABLES_ACTION_DELETE); } @@ -449,7 +461,7 @@ iptablesForwardAllowRelatedIn(virFirewall *fw, unsigned int prefix, const char *iface, const char *physdev, - int action) + iptablesAction action) { virFirewallLayer layer = VIR_SOCKET_ADDR_FAMILY(netaddr) == AF_INET ? VIR_FIREWALL_LAYER_IPV4 : VIR_FIREWALL_LAYER_IPV6; @@ -461,7 +473,7 @@ iptablesForwardAllowRelatedIn(virFirewall *fw, if (physdev && physdev[0]) virFirewallAddCmd(fw, layer, "--table", "filter", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + iptablesActionTypeToString(action), VIR_IPTABLES_FWD_IN_CHAIN, "--destination", networkstr, "--in-interface", physdev, @@ -473,7 +485,7 @@ iptablesForwardAllowRelatedIn(virFirewall *fw, else virFirewallAddCmd(fw, layer, "--table", "filter", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + iptablesActionTypeToString(action), VIR_IPTABLES_FWD_IN_CHAIN, "--destination", networkstr, "--out-interface", iface, @@ -506,7 +518,7 @@ iptablesAddForwardAllowRelatedIn(virFirewall *fw, const char *physdev) { return iptablesForwardAllowRelatedIn(fw, netaddr, prefix, iface, physdev, - VIR_NETFILTER_INSERT); + IPTABLES_ACTION_INSERT); } /** @@ -530,7 +542,7 @@ iptablesRemoveForwardAllowRelatedIn(virFirewall *fw, const char *physdev) { return iptablesForwardAllowRelatedIn(fw, netaddr, prefix, iface, physdev, - VIR_NETFILTER_DELETE); + IPTABLES_ACTION_DELETE); } /* Allow all traffic destined to the bridge, with a valid network address @@ -541,7 +553,7 @@ iptablesForwardAllowIn(virFirewall *fw, unsigned int prefix, const char *iface, const char *physdev, - int action) + iptablesAction action) { virFirewallLayer layer = VIR_SOCKET_ADDR_FAMILY(netaddr) == AF_INET ? VIR_FIREWALL_LAYER_IPV4 : VIR_FIREWALL_LAYER_IPV6; @@ -553,7 +565,7 @@ iptablesForwardAllowIn(virFirewall *fw, if (physdev && physdev[0]) virFirewallAddCmd(fw, layer, "--table", "filter", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + iptablesActionTypeToString(action), VIR_IPTABLES_FWD_IN_CHAIN, "--destination", networkstr, "--in-interface", physdev, @@ -563,7 +575,7 @@ iptablesForwardAllowIn(virFirewall *fw, else virFirewallAddCmd(fw, layer, "--table", "filter", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + iptablesActionTypeToString(action), VIR_IPTABLES_FWD_IN_CHAIN, "--destination", networkstr, "--out-interface", iface, @@ -593,7 +605,7 @@ iptablesAddForwardAllowIn(virFirewall *fw, const char *physdev) { return iptablesForwardAllowIn(fw, netaddr, prefix, iface, physdev, - VIR_NETFILTER_INSERT); + IPTABLES_ACTION_INSERT); } /** @@ -617,18 +629,18 @@ iptablesRemoveForwardAllowIn(virFirewall *fw, const char *physdev) { return iptablesForwardAllowIn(fw, netaddr, prefix, iface, physdev, - VIR_NETFILTER_DELETE); + IPTABLES_ACTION_DELETE); } static void iptablesForwardAllowCross(virFirewall *fw, virFirewallLayer layer, const char *iface, - int action) + iptablesAction action) { virFirewallAddCmd(fw, layer, "--table", "filter", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + iptablesActionTypeToString(action), VIR_IPTABLES_FWD_X_CHAIN, "--in-interface", iface, "--out-interface", iface, @@ -652,7 +664,7 @@ iptablesAddForwardAllowCross(virFirewall *fw, virFirewallLayer layer, const char *iface) { - iptablesForwardAllowCross(fw, layer, iface, VIR_NETFILTER_INSERT); + iptablesForwardAllowCross(fw, layer, iface, IPTABLES_ACTION_INSERT); } /** @@ -671,18 +683,18 @@ iptablesRemoveForwardAllowCross(virFirewall *fw, virFirewallLayer layer, const char *iface) { - iptablesForwardAllowCross(fw, layer, iface, VIR_NETFILTER_DELETE); + iptablesForwardAllowCross(fw, layer, iface, IPTABLES_ACTION_DELETE); } static void iptablesForwardRejectOut(virFirewall *fw, virFirewallLayer layer, const char *iface, - int action) + iptablesAction action) { virFirewallAddCmd(fw, layer, "--table", "filter", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + iptablesActionTypeToString(action), VIR_IPTABLES_FWD_OUT_CHAIN, "--in-interface", iface, "--jump", "REJECT", @@ -704,7 +716,7 @@ iptablesAddForwardRejectOut(virFirewall *fw, virFirewallLayer layer, const char *iface) { - iptablesForwardRejectOut(fw, layer, iface, VIR_NETFILTER_INSERT); + iptablesForwardRejectOut(fw, layer, iface, IPTABLES_ACTION_INSERT); } /** @@ -722,7 +734,7 @@ iptablesRemoveForwardRejectOut(virFirewall *fw, virFirewallLayer layer, const char *iface) { - iptablesForwardRejectOut(fw, layer, iface, VIR_NETFILTER_DELETE); + iptablesForwardRejectOut(fw, layer, iface, IPTABLES_ACTION_DELETE); } @@ -730,11 +742,11 @@ static void iptablesForwardRejectIn(virFirewall *fw, virFirewallLayer layer, const char *iface, - int action) + iptablesAction action) { virFirewallAddCmd(fw, layer, "--table", "filter", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + iptablesActionTypeToString(action), VIR_IPTABLES_FWD_IN_CHAIN, "--out-interface", iface, "--jump", "REJECT", @@ -756,7 +768,7 @@ iptablesAddForwardRejectIn(virFirewall *fw, virFirewallLayer layer, const char *iface) { - iptablesForwardRejectIn(fw, layer, iface, VIR_NETFILTER_INSERT); + iptablesForwardRejectIn(fw, layer, iface, IPTABLES_ACTION_INSERT); } /** @@ -774,7 +786,7 @@ iptablesRemoveForwardRejectIn(virFirewall *fw, virFirewallLayer layer, const char *iface) { - iptablesForwardRejectIn(fw, layer, iface, VIR_NETFILTER_DELETE); + iptablesForwardRejectIn(fw, layer, iface, IPTABLES_ACTION_DELETE); } @@ -789,7 +801,7 @@ iptablesForwardMasquerade(virFirewall *fw, virSocketAddrRange *addr, virPortRange *port, const char *protocol, - int action) + iptablesAction action) { g_autofree char *networkstr = NULL; g_autofree char *addrStartStr = NULL; @@ -816,7 +828,7 @@ iptablesForwardMasquerade(virFirewall *fw, if (protocol && protocol[0]) { fwCmd = virFirewallAddCmd(fw, layer, "--table", "nat", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + iptablesActionTypeToString(action), VIR_IPTABLES_NAT_POSTROUTE_CHAIN, "--source", networkstr, "-p", protocol, @@ -825,7 +837,7 @@ iptablesForwardMasquerade(virFirewall *fw, } else { fwCmd = virFirewallAddCmd(fw, layer, "--table", "nat", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + iptablesActionTypeToString(action), VIR_IPTABLES_NAT_POSTROUTE_CHAIN, "--source", networkstr, "!", "--destination", networkstr, @@ -900,7 +912,7 @@ iptablesAddForwardMasquerade(virFirewall *fw, { return iptablesForwardMasquerade(fw, netaddr, prefix, physdev, addr, port, protocol, - VIR_NETFILTER_INSERT); + IPTABLES_ACTION_INSERT); } /** @@ -927,7 +939,7 @@ iptablesRemoveForwardMasquerade(virFirewall *fw, { return iptablesForwardMasquerade(fw, netaddr, prefix, physdev, addr, port, protocol, - VIR_NETFILTER_DELETE); + IPTABLES_ACTION_DELETE); } @@ -940,7 +952,7 @@ iptablesForwardDontMasquerade(virFirewall *fw, unsigned int prefix, const char *physdev, const char *destaddr, - int action) + iptablesAction action) { g_autofree char *networkstr = NULL; virFirewallLayer layer = VIR_SOCKET_ADDR_FAMILY(netaddr) == AF_INET ? @@ -952,7 +964,7 @@ iptablesForwardDontMasquerade(virFirewall *fw, if (physdev && physdev[0]) virFirewallAddCmd(fw, layer, "--table", "nat", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + iptablesActionTypeToString(action), VIR_IPTABLES_NAT_POSTROUTE_CHAIN, "--out-interface", physdev, "--source", networkstr, @@ -962,7 +974,7 @@ iptablesForwardDontMasquerade(virFirewall *fw, else virFirewallAddCmd(fw, layer, "--table", "nat", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + iptablesActionTypeToString(action), VIR_IPTABLES_NAT_POSTROUTE_CHAIN, "--source", networkstr, "--destination", destaddr, @@ -994,7 +1006,7 @@ iptablesAddDontMasquerade(virFirewall *fw, const char *destaddr) { return iptablesForwardDontMasquerade(fw, netaddr, prefix, - physdev, destaddr, VIR_NETFILTER_INSERT); + physdev, destaddr, IPTABLES_ACTION_INSERT); } /** @@ -1020,7 +1032,7 @@ iptablesRemoveDontMasquerade(virFirewall *fw, { return iptablesForwardDontMasquerade(fw, netaddr, prefix, physdev, destaddr, - VIR_NETFILTER_DELETE); + IPTABLES_ACTION_DELETE); } @@ -1028,13 +1040,13 @@ static void iptablesOutputFixUdpChecksum(virFirewall *fw, const char *iface, int port, - int action) + iptablesAction action) { g_autofree char *portstr = g_strdup_printf("%d", port); virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_IPV4, "--table", "mangle", - action == VIR_NETFILTER_INSERT ? "--insert" : "--delete", + iptablesActionTypeToString(action), VIR_IPTABLES_NAT_POSTROUTE_CHAIN, "--out-interface", iface, "--protocol", "udp", @@ -1059,7 +1071,7 @@ iptablesAddOutputFixUdpChecksum(virFirewall *fw, const char *iface, int port) { - iptablesOutputFixUdpChecksum(fw, iface, port, VIR_NETFILTER_INSERT); + iptablesOutputFixUdpChecksum(fw, iface, port, IPTABLES_ACTION_INSERT); } /** @@ -1076,7 +1088,7 @@ iptablesRemoveOutputFixUdpChecksum(virFirewall *fw, const char *iface, int port) { - iptablesOutputFixUdpChecksum(fw, iface, port, VIR_NETFILTER_DELETE); + iptablesOutputFixUdpChecksum(fw, iface, port, IPTABLES_ACTION_DELETE); } -- 2.44.0
In normal practice a virFirewallCmd should never have 0 args by the time it gets to the Apply stage, but at some time while debugging one of the other patches in this series, exactly that happened (due to a bug that was since squashed), and having a check for it helped debugging, so let's permanently check for it. Signed-off-by: Laine Stump <laine@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> --- src/util/virfirewall.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/src/util/virfirewall.c b/src/util/virfirewall.c index 902cb8e445..1897a66070 100644 --- a/src/util/virfirewall.c +++ b/src/util/virfirewall.c @@ -538,6 +538,12 @@ virFirewallApplyCmd(virFirewall *firewall, if (fwCmd->ignoreErrors) ignoreErrors = fwCmd->ignoreErrors; + if (fwCmd->argsLen == 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("Can't apply empty firewall command")); + return -1; + } + if (virFirewallApplyCmdDirect(fwCmd, ignoreErrors, &output) < 0) return -1; -- 2.44.0
We will already need a separate function for virFirewallApplyCmd for iptables vs. nftables, but the only reason for needing a separate function for virFirewallAddCmd* is that iptables/ebtables need to have an extra arg added for locking (to prevent multiple iptables commands from running at the same time). We can just as well add in the -w/--concurrent during virFirewallApplyCmd, so move the arg-add to ApplyCmd to keep AddCmd simple. Signed-off-by: Laine Stump <laine@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> --- src/util/virfirewall.c | 27 +++++++++++++-------------- 1 file changed, 13 insertions(+), 14 deletions(-) diff --git a/src/util/virfirewall.c b/src/util/virfirewall.c index 1897a66070..a57a79d4ce 100644 --- a/src/util/virfirewall.c +++ b/src/util/virfirewall.c @@ -213,20 +213,6 @@ virFirewallAddCmdFullV(virFirewall *firewall, fwCmd->queryOpaque = opaque; fwCmd->ignoreErrors = ignoreErrors; - switch (fwCmd->layer) { - case VIR_FIREWALL_LAYER_ETHERNET: - ADD_ARG(fwCmd, "--concurrent"); - break; - case VIR_FIREWALL_LAYER_IPV4: - ADD_ARG(fwCmd, "-w"); - break; - case VIR_FIREWALL_LAYER_IPV6: - ADD_ARG(fwCmd, "-w"); - break; - case VIR_FIREWALL_LAYER_LAST: - break; - } - while ((str = va_arg(args, char *)) != NULL) ADD_ARG(fwCmd, str); @@ -499,6 +485,19 @@ virFirewallApplyCmdDirect(virFirewallCmd *fwCmd, cmd = virCommandNewArgList(bin, NULL); + /* lock to assure nobody else is messing with the tables while we are */ + switch (fwCmd->layer) { + case VIR_FIREWALL_LAYER_ETHERNET: + virCommandAddArg(cmd, "--concurrent"); + break; + case VIR_FIREWALL_LAYER_IPV4: + case VIR_FIREWALL_LAYER_IPV6: + virCommandAddArg(cmd, "-w"); + break; + case VIR_FIREWALL_LAYER_LAST: + break; + } + for (i = 0; i < fwCmd->argsLen; i++) virCommandAddArg(cmd, fwCmd->args[i]); -- 2.44.0
We know at the time a virFirewallCmd is created (with virFirewallAddCmd*()) whether or not we will later want to ignore errors encountered when attempting to apply that command - if ignoreErrors is set in the AddCmd or if the group has already had VIR_FIREWALL_TRANSACTION_IGNORE_ERRORS set, then we ignore the errors. Rather than setting the fwCmd->ignoreErrors only according to the arg sent to virFirewallAddCmdFull(), and then later (at ApplyCmd-time) combining that with the group transactionFlags setting (and passing it all the way down the call chain), just combine the two flags right away and store this final value in fwCmd->ignoreErrors when the virFirewallCmd is created (thus avoiding the need to look at anything other than fwCmd->ignoreErrors at the time the command is applied). Once that is done, we can simply grab ignoreErrors from the object down in virFirewallApply() rather than cluttering up the argument list on the entire call chain. Signed-off-by: Laine Stump <laine@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> --- src/util/virfirewall.c | 28 +++++++++++++--------------- 1 file changed, 13 insertions(+), 15 deletions(-) diff --git a/src/util/virfirewall.c b/src/util/virfirewall.c index a57a79d4ce..56d43bfdde 100644 --- a/src/util/virfirewall.c +++ b/src/util/virfirewall.c @@ -211,14 +211,19 @@ virFirewallAddCmdFullV(virFirewall *firewall, fwCmd->layer = layer; fwCmd->queryCB = cb; fwCmd->queryOpaque = opaque; - fwCmd->ignoreErrors = ignoreErrors; while ((str = va_arg(args, char *)) != NULL) ADD_ARG(fwCmd, str); if (group->addingRollback) { + fwCmd->ignoreErrors = true; /* always ignore errors when rolling back */ VIR_APPEND_ELEMENT_COPY(group->rollback, group->nrollback, fwCmd); } else { + /* when not rolling back, ignore errors if this group (transaction) + * was started with VIR_FIREWALL_TRANSACTION_IGNORE_ERRORS *or* + * if this specific rule was created with ignoreErrors == true + */ + fwCmd->ignoreErrors = ignoreErrors || (group->actionFlags & VIR_FIREWALL_TRANSACTION_IGNORE_ERRORS); VIR_APPEND_ELEMENT_COPY(group->action, group->naction, fwCmd); } @@ -466,8 +471,7 @@ virFirewallCmdToString(const char *cmd, static int virFirewallApplyCmdDirect(virFirewallCmd *fwCmd, - bool ignoreErrors, - char **output) + char **output) { size_t i; const char *bin = virFirewallLayerCommandTypeToString(fwCmd->layer); @@ -511,7 +515,7 @@ virFirewallApplyCmdDirect(virFirewallCmd *fwCmd, return -1; if (status != 0) { - if (ignoreErrors) { + if (fwCmd->ignoreErrors) { VIR_DEBUG("Ignoring error running command"); } else { virReportError(VIR_ERR_INTERNAL_ERROR, @@ -528,22 +532,18 @@ virFirewallApplyCmdDirect(virFirewallCmd *fwCmd, static int virFirewallApplyCmd(virFirewall *firewall, - virFirewallCmd *fwCmd, - bool ignoreErrors) + virFirewallCmd *fwCmd) { g_autofree char *output = NULL; g_auto(GStrv) lines = NULL; - if (fwCmd->ignoreErrors) - ignoreErrors = fwCmd->ignoreErrors; - if (fwCmd->argsLen == 0) { virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("Can't apply empty firewall command")); return -1; } - if (virFirewallApplyCmdDirect(fwCmd, ignoreErrors, &output) < 0) + if (virFirewallApplyCmdDirect(fwCmd, &output) < 0) return -1; if (fwCmd->queryCB && output) { @@ -570,7 +570,7 @@ virFirewallApplyGroup(virFirewall *firewall, size_t idx) { virFirewallGroup *group = firewall->groups[idx]; - bool ignoreErrors = (group->actionFlags & VIR_FIREWALL_TRANSACTION_IGNORE_ERRORS); + size_t i; VIR_INFO("Starting transaction for firewall=%p group=%p flags=0x%x", @@ -578,9 +578,7 @@ virFirewallApplyGroup(virFirewall *firewall, firewall->currentGroup = idx; group->addingRollback = false; for (i = 0; i < group->naction; i++) { - if (virFirewallApplyCmd(firewall, - group->action[i], - ignoreErrors) < 0) + if (virFirewallApplyCmd(firewall, group->action[i]) < 0) return -1; } return 0; @@ -598,7 +596,7 @@ virFirewallRollbackGroup(virFirewall *firewall, firewall->currentGroup = idx; group->addingRollback = true; for (i = 0; i < group->nrollback; i++) - ignore_value(virFirewallApplyCmd(firewall, group->rollback[i], true)); + ignore_value(virFirewallApplyCmd(firewall, group->rollback[i])); } -- 2.44.0
(This paragraph is for historical reference only, described only to avoid confusion of past use of the name with its new use) In a past life, virFirewallBackend had been a private static in virfirewall.c that was set at daemon init time, and used to globally (i.e. for all drivers in the daemon) determine whether to directly execute iptables commands, or to run them indirectly via the firewalld passthrough API. This was removed in commit d566cc55, since we decided that using the firewalld passthrough API is never appropriate. Now the same enum, virFirewallBackend, is being reintroduced, with a different meaning and usage pattern. It will be used to pick between using nftables commands or iptables commands (in either case directly handled by libvirt, *not* via firewalld). Additionally, rather than being a static known only within virfirewall.c and applying to all firewall commands for all drivers, each virFirewall object will have its own backend setting, which will be set during virFirewallNew() by the driver who wants to add a firewall rule. This will allow the nwfilter and network drivers to each have their own backend setting, even when they coexist in a single unified daemon. At least as important as that, it will also allow an instance of the network driver to remove iptables rules that had been added by a previous instance, and then add nftables rules for the new instance (in the case that an admin, or possibly an update, switches the driver backend from iptables to nftable) Initially, the enum will only have one usable value - VIR_FIREWALL_BACKEND_IPTABLES, and that will be hardcoded into all calls to virFirewallNew(). The other enum value (along with a method of setting it for each driver) will be added later, when it can be used (when the nftables backend is in the code). Signed-off-by: Laine Stump <laine@redhat.com> --- Change from V2: * eliminate VIR_FIREWALL_BACKEND_UNSET src/libvirt_private.syms | 3 +++ src/network/network_iptables.c | 6 +++--- src/nwfilter/nwfilter_ebiptables_driver.c | 16 ++++++++-------- src/util/virebtables.c | 4 ++-- src/util/virfirewall.c | 15 ++++++++++++++- src/util/virfirewall.h | 11 ++++++++++- tests/virfirewalltest.c | 20 ++++++++++---------- 7 files changed, 50 insertions(+), 25 deletions(-) diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 435be1b4c5..457b51e289 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -2405,6 +2405,8 @@ virFileCacheSetPriv; # util/virfirewall.h virFirewallAddCmdFull; virFirewallApply; +virFirewallBackendTypeFromString; +virFirewallBackendTypeToString; virFirewallCmdAddArg; virFirewallCmdAddArgFormat; virFirewallCmdAddArgList; @@ -2412,6 +2414,7 @@ virFirewallCmdAddArgSet; virFirewallCmdGetArgCount; virFirewallCmdToString; virFirewallFree; +virFirewallGetBackend; virFirewallNew; virFirewallRemoveCmd; virFirewallStartRollback; diff --git a/src/network/network_iptables.c b/src/network/network_iptables.c index d7e749adf0..db35a4c5a0 100644 --- a/src/network/network_iptables.c +++ b/src/network/network_iptables.c @@ -131,7 +131,7 @@ iptablesPrivateChainCreate(virFirewall *fw, int iptablesSetupPrivateChains(virFirewallLayer layer) { - g_autoptr(virFirewall) fw = virFirewallNew(); + g_autoptr(virFirewall) fw = virFirewallNew(VIR_FIREWALL_BACKEND_IPTABLES); iptablesGlobalChain filter_chains[] = { {"INPUT", VIR_IPTABLES_INPUT_CHAIN}, {"OUTPUT", VIR_IPTABLES_OUTPUT_CHAIN}, @@ -1597,7 +1597,7 @@ iptablesAddFirewallRules(virNetworkDef *def) { size_t i; virNetworkIPDef *ipdef; - g_autoptr(virFirewall) fw = virFirewallNew(); + g_autoptr(virFirewall) fw = virFirewallNew(VIR_FIREWALL_BACKEND_IPTABLES); virFirewallStartTransaction(fw, 0); @@ -1632,7 +1632,7 @@ iptablesRemoveFirewallRules(virNetworkDef *def) { size_t i; virNetworkIPDef *ipdef; - g_autoptr(virFirewall) fw = virFirewallNew(); + g_autoptr(virFirewall) fw = virFirewallNew(VIR_FIREWALL_BACKEND_IPTABLES); virFirewallStartTransaction(fw, VIR_FIREWALL_TRANSACTION_IGNORE_ERRORS); iptablesRemoveChecksumFirewallRules(fw, def); diff --git a/src/nwfilter/nwfilter_ebiptables_driver.c b/src/nwfilter/nwfilter_ebiptables_driver.c index 3ef1bb576e..5082b62577 100644 --- a/src/nwfilter/nwfilter_ebiptables_driver.c +++ b/src/nwfilter/nwfilter_ebiptables_driver.c @@ -2820,7 +2820,7 @@ static int ebtablesApplyBasicRules(const char *ifname, const virMacAddr *macaddr) { - g_autoptr(virFirewall) fw = virFirewallNew(); + g_autoptr(virFirewall) fw = virFirewallNew(VIR_FIREWALL_BACKEND_IPTABLES); char chain[MAX_CHAINNAME_LENGTH]; char chainPrefix = CHAINPREFIX_HOST_IN_TEMP; char macaddr_str[VIR_MAC_STRING_BUFLEN]; @@ -2893,7 +2893,7 @@ ebtablesApplyDHCPOnlyRules(const char *ifname, char macaddr_str[VIR_MAC_STRING_BUFLEN]; unsigned int idx = 0; unsigned int num_dhcpsrvrs; - g_autoptr(virFirewall) fw = virFirewallNew(); + g_autoptr(virFirewall) fw = virFirewallNew(VIR_FIREWALL_BACKEND_IPTABLES); virMacAddrFormat(macaddr, macaddr_str); @@ -2995,7 +2995,7 @@ ebtablesApplyDropAllRules(const char *ifname) { char chain_in [MAX_CHAINNAME_LENGTH], chain_out[MAX_CHAINNAME_LENGTH]; - g_autoptr(virFirewall) fw = virFirewallNew(); + g_autoptr(virFirewall) fw = virFirewallNew(VIR_FIREWALL_BACKEND_IPTABLES); if (ebiptablesAllTeardown(ifname) < 0) return -1; @@ -3042,7 +3042,7 @@ ebtablesRemoveBasicRules(const char *ifname) static int ebtablesCleanAll(const char *ifname) { - g_autoptr(virFirewall) fw = virFirewallNew(); + g_autoptr(virFirewall) fw = virFirewallNew(VIR_FIREWALL_BACKEND_IPTABLES); virFirewallStartTransaction(fw, VIR_FIREWALL_TRANSACTION_IGNORE_ERRORS); @@ -3302,7 +3302,7 @@ ebiptablesApplyNewRules(const char *ifname, size_t nrules) { size_t i, j; - g_autoptr(virFirewall) fw = virFirewallNew(); + g_autoptr(virFirewall) fw = virFirewallNew(VIR_FIREWALL_BACKEND_IPTABLES); g_autoptr(GHashTable) chains_in_set = virHashNew(NULL); g_autoptr(GHashTable) chains_out_set = virHashNew(NULL); bool haveEbtables = false; @@ -3527,7 +3527,7 @@ ebiptablesTearNewRulesFW(virFirewall *fw, const char *ifname) static int ebiptablesTearNewRules(const char *ifname) { - g_autoptr(virFirewall) fw = virFirewallNew(); + g_autoptr(virFirewall) fw = virFirewallNew(VIR_FIREWALL_BACKEND_IPTABLES); virFirewallStartTransaction(fw, VIR_FIREWALL_TRANSACTION_IGNORE_ERRORS); @@ -3539,7 +3539,7 @@ ebiptablesTearNewRules(const char *ifname) static int ebiptablesTearOldRules(const char *ifname) { - g_autoptr(virFirewall) fw = virFirewallNew(); + g_autoptr(virFirewall) fw = virFirewallNew(VIR_FIREWALL_BACKEND_IPTABLES); virFirewallStartTransaction(fw, VIR_FIREWALL_TRANSACTION_IGNORE_ERRORS); @@ -3574,7 +3574,7 @@ ebiptablesTearOldRules(const char *ifname) static int ebiptablesAllTeardown(const char *ifname) { - g_autoptr(virFirewall) fw = virFirewallNew(); + g_autoptr(virFirewall) fw = virFirewallNew(VIR_FIREWALL_BACKEND_IPTABLES); virFirewallStartTransaction(fw, VIR_FIREWALL_TRANSACTION_IGNORE_ERRORS); diff --git a/src/util/virebtables.c b/src/util/virebtables.c index cabcbb3e81..8a361a2dbb 100644 --- a/src/util/virebtables.c +++ b/src/util/virebtables.c @@ -78,7 +78,7 @@ ebtablesContextFree(ebtablesContext *ctx) int ebtablesAddForwardPolicyReject(ebtablesContext *ctx) { - g_autoptr(virFirewall) fw = virFirewallNew(); + g_autoptr(virFirewall) fw = virFirewallNew(VIR_FIREWALL_BACKEND_IPTABLES); virFirewallStartTransaction(fw, VIR_FIREWALL_TRANSACTION_IGNORE_ERRORS); virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_ETHERNET, @@ -106,7 +106,7 @@ ebtablesForwardAllowIn(ebtablesContext *ctx, const char *macaddr, int action) { - g_autoptr(virFirewall) fw = virFirewallNew(); + g_autoptr(virFirewall) fw = virFirewallNew(VIR_FIREWALL_BACKEND_IPTABLES); virFirewallStartTransaction(fw, 0); virFirewallAddCmd(fw, VIR_FIREWALL_LAYER_ETHERNET, diff --git a/src/util/virfirewall.c b/src/util/virfirewall.c index 56d43bfdde..77de34533d 100644 --- a/src/util/virfirewall.c +++ b/src/util/virfirewall.c @@ -35,6 +35,10 @@ VIR_LOG_INIT("util.firewall"); +VIR_ENUM_IMPL(virFirewallBackend, + VIR_FIREWALL_BACKEND_LAST, + "iptables"); + typedef struct _virFirewallGroup virFirewallGroup; VIR_ENUM_DECL(virFirewallLayerCommand); @@ -77,6 +81,7 @@ struct _virFirewall { size_t ngroups; virFirewallGroup **groups; size_t currentGroup; + virFirewallBackend backend; }; static virMutex fwCmdLock = VIR_MUTEX_INITIALIZER; @@ -98,14 +103,22 @@ virFirewallGroupNew(void) * * Returns the new firewall ruleset */ -virFirewall *virFirewallNew(void) +virFirewall *virFirewallNew(virFirewallBackend backend) { virFirewall *firewall = g_new0(virFirewall, 1); + firewall->backend = backend; return firewall; } +virFirewallBackend +virFirewallGetBackend(virFirewall *firewall) +{ + return firewall->backend; +} + + static void virFirewallCmdFree(virFirewallCmd *fwCmd) { diff --git a/src/util/virfirewall.h b/src/util/virfirewall.h index 956bf0e2bf..1ca1cce10a 100644 --- a/src/util/virfirewall.h +++ b/src/util/virfirewall.h @@ -21,6 +21,7 @@ #pragma once #include "internal.h" +#include "virenum.h" typedef struct _virFirewall virFirewall; @@ -34,9 +35,17 @@ typedef enum { VIR_FIREWALL_LAYER_LAST, } virFirewallLayer; -virFirewall *virFirewallNew(void); +typedef enum { + VIR_FIREWALL_BACKEND_IPTABLES, + + VIR_FIREWALL_BACKEND_LAST, +} virFirewallBackend; + +VIR_ENUM_DECL(virFirewallBackend); +virFirewall *virFirewallNew(virFirewallBackend backend); void virFirewallFree(virFirewall *firewall); +virFirewallBackend virFirewallGetBackend(virFirewall *firewall); /** * virFirewallAddCmd: diff --git a/tests/virfirewalltest.c b/tests/virfirewalltest.c index 45bb67cb21..38726dcc7a 100644 --- a/tests/virfirewalltest.c +++ b/tests/virfirewalltest.c @@ -62,7 +62,7 @@ static int testFirewallSingleGroup(const void *opaque G_GNUC_UNUSED) { g_auto(virBuffer) cmdbuf = VIR_BUFFER_INITIALIZER; - g_autoptr(virFirewall) fw = virFirewallNew(); + g_autoptr(virFirewall) fw = virFirewallNew(VIR_FIREWALL_BACKEND_IPTABLES); const char *actual = NULL; const char *expected = IPTABLES " -w -A INPUT --source 192.168.122.1 --jump ACCEPT\n" @@ -102,7 +102,7 @@ static int testFirewallRemoveRule(const void *opaque G_GNUC_UNUSED) { g_auto(virBuffer) cmdbuf = VIR_BUFFER_INITIALIZER; - g_autoptr(virFirewall) fw = virFirewallNew(); + g_autoptr(virFirewall) fw = virFirewallNew(VIR_FIREWALL_BACKEND_IPTABLES); const char *actual = NULL; const char *expected = IPTABLES " -w -A INPUT --source 192.168.122.1 --jump ACCEPT\n" @@ -148,7 +148,7 @@ static int testFirewallManyGroups(const void *opaque G_GNUC_UNUSED) { g_auto(virBuffer) cmdbuf = VIR_BUFFER_INITIALIZER; - g_autoptr(virFirewall) fw = virFirewallNew(); + g_autoptr(virFirewall) fw = virFirewallNew(VIR_FIREWALL_BACKEND_IPTABLES); const char *actual = NULL; const char *expected = IPTABLES " -w -A INPUT --source 192.168.122.1 --jump ACCEPT\n" @@ -222,7 +222,7 @@ static int testFirewallIgnoreFailGroup(const void *opaque G_GNUC_UNUSED) { g_auto(virBuffer) cmdbuf = VIR_BUFFER_INITIALIZER; - g_autoptr(virFirewall) fw = virFirewallNew(); + g_autoptr(virFirewall) fw = virFirewallNew(VIR_FIREWALL_BACKEND_IPTABLES); const char *actual = NULL; const char *expected = IPTABLES " -w -A INPUT --source 192.168.122.1 --jump ACCEPT\n" @@ -275,7 +275,7 @@ static int testFirewallIgnoreFailRule(const void *opaque G_GNUC_UNUSED) { g_auto(virBuffer) cmdbuf = VIR_BUFFER_INITIALIZER; - g_autoptr(virFirewall) fw = virFirewallNew(); + g_autoptr(virFirewall) fw = virFirewallNew(VIR_FIREWALL_BACKEND_IPTABLES); const char *actual = NULL; const char *expected = IPTABLES " -w -A INPUT --source 192.168.122.1 --jump ACCEPT\n" @@ -327,7 +327,7 @@ static int testFirewallNoRollback(const void *opaque G_GNUC_UNUSED) { g_auto(virBuffer) cmdbuf = VIR_BUFFER_INITIALIZER; - g_autoptr(virFirewall) fw = virFirewallNew(); + g_autoptr(virFirewall) fw = virFirewallNew(VIR_FIREWALL_BACKEND_IPTABLES); const char *actual = NULL; const char *expected = IPTABLES " -w -A INPUT --source 192.168.122.1 --jump ACCEPT\n" @@ -372,7 +372,7 @@ static int testFirewallSingleRollback(const void *opaque G_GNUC_UNUSED) { g_auto(virBuffer) cmdbuf = VIR_BUFFER_INITIALIZER; - g_autoptr(virFirewall) fw = virFirewallNew(); + g_autoptr(virFirewall) fw = virFirewallNew(VIR_FIREWALL_BACKEND_IPTABLES); const char *actual = NULL; const char *expected = IPTABLES " -w -A INPUT --source 192.168.122.1 --jump ACCEPT\n" @@ -437,7 +437,7 @@ static int testFirewallManyRollback(const void *opaque G_GNUC_UNUSED) { g_auto(virBuffer) cmdbuf = VIR_BUFFER_INITIALIZER; - g_autoptr(virFirewall) fw = virFirewallNew(); + g_autoptr(virFirewall) fw = virFirewallNew(VIR_FIREWALL_BACKEND_IPTABLES); const char *actual = NULL; const char *expected = IPTABLES " -w -A INPUT --source 192.168.122.1 --jump ACCEPT\n" @@ -505,7 +505,7 @@ static int testFirewallChainedRollback(const void *opaque G_GNUC_UNUSED) { g_auto(virBuffer) cmdbuf = VIR_BUFFER_INITIALIZER; - g_autoptr(virFirewall) fw = virFirewallNew(); + g_autoptr(virFirewall) fw = virFirewallNew(VIR_FIREWALL_BACKEND_IPTABLES); const char *actual = NULL; const char *expected = IPTABLES " -w -A INPUT --source 192.168.122.1 --jump ACCEPT\n" @@ -682,7 +682,7 @@ static int testFirewallQuery(const void *opaque G_GNUC_UNUSED) { g_auto(virBuffer) cmdbuf = VIR_BUFFER_INITIALIZER; - g_autoptr(virFirewall) fw = virFirewallNew(); + g_autoptr(virFirewall) fw = virFirewallNew(VIR_FIREWALL_BACKEND_IPTABLES); const char *actual = NULL; const char *expected = IPTABLES " -w -A INPUT --source 192.168.122.1 --jump ACCEPT\n" -- 2.44.0
This file is generated from network.conf.in because it will soon have an item that must be modified according to meson buildtime config. Signed-off-by: Laine Stump <laine@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> --- libvirt.spec.in | 3 ++ src/network/libvirtd_network.aug | 36 ++++++++++++++++++++++++ src/network/meson.build | 16 +++++++++++ src/network/network.conf.in | 3 ++ src/network/test_libvirtd_network.aug.in | 2 ++ 5 files changed, 60 insertions(+) create mode 100644 src/network/libvirtd_network.aug create mode 100644 src/network/network.conf.in create mode 100644 src/network/test_libvirtd_network.aug.in diff --git a/libvirt.spec.in b/libvirt.spec.in index 64018192b6..bde25c6f6e 100644 --- a/libvirt.spec.in +++ b/libvirt.spec.in @@ -2108,6 +2108,9 @@ exit 0 %config(noreplace) %{_sysconfdir}/libvirt/virtnetworkd.conf %{_datadir}/augeas/lenses/virtnetworkd.aug %{_datadir}/augeas/lenses/tests/test_virtnetworkd.aug +%config(noreplace) %{_sysconfdir}/libvirt/network.conf +%{_datadir}/augeas/lenses/libvirtd_network.aug +%{_datadir}/augeas/lenses/tests/test_libvirtd_network.aug %{_unitdir}/virtnetworkd.service %{_unitdir}/virtnetworkd.socket %{_unitdir}/virtnetworkd-ro.socket diff --git a/src/network/libvirtd_network.aug b/src/network/libvirtd_network.aug new file mode 100644 index 0000000000..ae153d96a1 --- /dev/null +++ b/src/network/libvirtd_network.aug @@ -0,0 +1,36 @@ +(* /etc/libvirt/network.conf *) + +module Libvirtd_network = + autoload xfm + + let eol = del /[ \t]*\n/ "\n" + let value_sep = del /[ \t]*=[ \t]*/ " = " + let indent = del /[ \t]*/ "" + + let array_sep = del /,[ \t\n]*/ ", " + let array_start = del /\[[ \t\n]*/ "[ " + let array_end = del /\]/ "]" + + let str_val = del /\"/ "\"" . store /[^\"]*/ . del /\"/ "\"" + let bool_val = store /0|1/ + let int_val = store /[0-9]+/ + let str_array_element = [ seq "el" . str_val ] . del /[ \t\n]*/ "" + let str_array_val = counter "el" . array_start . ( str_array_element . ( array_sep . str_array_element ) * ) ? . array_end + + let str_entry (kw:string) = [ key kw . value_sep . str_val ] + let bool_entry (kw:string) = [ key kw . value_sep . bool_val ] + let int_entry (kw:string) = [ key kw . value_sep . int_val ] + let str_array_entry (kw:string) = [ key kw . value_sep . str_array_val ] + + (* Each entry in the config is one of the following *) + let comment = [ label "#comment" . del /#[ \t]*/ "# " . store /([^ \t\n][^\n]*)?/ . del /\n/ "\n" ] + let empty = [ label "#empty" . eol ] + + let record = indent . eol + + let lns = ( record | comment | empty ) * + + let filter = incl "/etc/libvirt/network.conf" + . Util.stdexcl + + let xfm = transform lns filter diff --git a/src/network/meson.build b/src/network/meson.build index 305e2d52fb..0336435862 100644 --- a/src/network/meson.build +++ b/src/network/meson.build @@ -49,6 +49,22 @@ if conf.has('WITH_NETWORK') ], } + network_conf = configure_file( + input: 'network.conf.in', + output: 'network.conf', + configuration: configmake_conf, + ) + virt_conf_files += network_conf + virt_aug_files += files('libvirtd_network.aug') + virt_test_aug_files += { + 'name': 'test_libvirtd_network.aug', + 'aug': files('test_libvirtd_network.aug.in'), + 'conf': network_conf, + 'test_name': 'libvirtd_network', + 'test_srcdir': meson.current_source_dir(), + 'test_builddir': meson.current_build_dir(), + } + virt_daemon_confs += { 'name': 'virtnetworkd', } diff --git a/src/network/network.conf.in b/src/network/network.conf.in new file mode 100644 index 0000000000..5c84003f6d --- /dev/null +++ b/src/network/network.conf.in @@ -0,0 +1,3 @@ +# Master configuration file for the network driver. +# All settings described here are optional - if omitted, sensible +# defaults are used. diff --git a/src/network/test_libvirtd_network.aug.in b/src/network/test_libvirtd_network.aug.in new file mode 100644 index 0000000000..ffdca520ce --- /dev/null +++ b/src/network/test_libvirtd_network.aug.in @@ -0,0 +1,2 @@ +module Test_libvirtd_network = + @CONFIG@ -- 2.44.0
It still can have only one useful value ("iptables"), but once a 2nd value is supported, it will be selectable by setting "firewall_backend=nftables" in /etc/libvirt/network.conf. If firewall_backend isn't set in network.conf, then libvirt will check to see if the iptables binary is present on the system and set firewallBackend to iptables - if no iptables binary is found, that is considered a fatal error (since no networks can be started anyway), so an error is logged and startup of the network driver fails. NB: network.conf is itself created from network.conf.in at build time, and the advertised default setting of firewall_backend (in a commented out line) is set from the meson_options.txt setting "firewall_backend". This way the conf file will have correct information no matter what default backend is chosen at build time. Signed-off-by: Laine Stump <laine@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> --- Changes from V2: * make failure to find iptables during network driver init fatal * recognize firewall_backend setting in meson_options.txt and propagate it through to: * meson-config.h (along with a numeric constant FIREWALL_BACKEND_DEFAULT_IPTABLES, which can be used for conditional compilation) * network.conf - default setting and comments use @FIREWALL_BACKEND@ * test_libvirtd_network.aug.in so that default firewall backend for testing is set properly (this required calisthenics similar to qemu_user_group_hack_conf in the qemu driver's meson.build (see commit 64a7b8203bf) meson.build | 5 +++ meson_options.txt | 1 + src/network/bridge_driver.c | 22 ++++++----- src/network/bridge_driver_conf.c | 50 ++++++++++++++++++++++++ src/network/bridge_driver_conf.h | 3 ++ src/network/bridge_driver_linux.c | 6 ++- src/network/bridge_driver_nop.c | 6 ++- src/network/bridge_driver_platform.h | 6 ++- src/network/libvirtd_network.aug | 5 ++- src/network/meson.build | 22 ++++++++++- src/network/network.conf.in | 8 ++++ src/network/test_libvirtd_network.aug.in | 3 ++ tests/networkxml2firewalltest.c | 2 +- 13 files changed, 119 insertions(+), 20 deletions(-) diff --git a/meson.build b/meson.build index 1518afa1cb..02340c09dd 100644 --- a/meson.build +++ b/meson.build @@ -1618,6 +1618,11 @@ endif if not get_option('driver_network').disabled() and conf.has('WITH_LIBVIRTD') conf.set('WITH_NETWORK', 1) + firewall_backend = get_option('firewall_backend') + conf.set_quoted('FIREWALL_BACKEND', firewall_backend) + if firewall_backend == 'iptables' + conf.set('FIREWALL_BACKEND_DEFAULT_IPTABLES', 1) + endif elif get_option('driver_network').enabled() error('libvirtd must be enabled to build the network driver') endif diff --git a/meson_options.txt b/meson_options.txt index ed91d97abf..367629f5dc 100644 --- a/meson_options.txt +++ b/meson_options.txt @@ -98,6 +98,7 @@ option('chrdev_lock_files', type: 'string', value: '', description: 'location fo option('dtrace', type: 'feature', value: 'auto', description: 'use dtrace for static probing') option('firewalld', type: 'feature', value: 'auto', description: 'firewalld support') option('firewalld_zone', type: 'feature', value: 'auto', description: 'whether to install firewalld libvirt zone') +option('firewall_backend', type: 'string', value: 'iptables', description: 'which firewall backend to use by default when none is specified') option('host_validate', type: 'feature', value: 'auto', description: 'build virt-host-validate') option('init_script', type: 'combo', choices: ['systemd', 'openrc', 'check', 'none'], value: 'check', description: 'Style of init script to install') option('loader_nvram', type: 'string', value: '', description: 'Pass list of pairs of <loader>:<nvram> paths. Both pairs and list items are separated by a colon.') diff --git a/src/network/bridge_driver.c b/src/network/bridge_driver.c index d89700c6ee..38e4ab84ad 100644 --- a/src/network/bridge_driver.c +++ b/src/network/bridge_driver.c @@ -1682,6 +1682,7 @@ static int networkReloadFirewallRulesHelper(virNetworkObj *obj, void *opaque G_GNUC_UNUSED) { + g_autoptr(virNetworkDriverConfig) cfg = virNetworkDriverGetConfig(networkGetDriver()); VIR_LOCK_GUARD lock = virObjectLockGuard(obj); virNetworkDef *def = virNetworkObjGetDef(obj); @@ -1695,8 +1696,8 @@ networkReloadFirewallRulesHelper(virNetworkObj *obj, * network type, forward='open', doesn't need this because it * has no iptables rules. */ - networkRemoveFirewallRules(def); - ignore_value(networkAddFirewallRules(def)); + networkRemoveFirewallRules(def, cfg->firewallBackend); + ignore_value(networkAddFirewallRules(def, cfg->firewallBackend)); break; case VIR_NETWORK_FORWARD_OPEN: @@ -1948,7 +1949,7 @@ networkStartNetworkVirtual(virNetworkDriverState *driver, /* Add "once per network" rules */ if (def->forward.type != VIR_NETWORK_FORWARD_OPEN && - networkAddFirewallRules(def) < 0) + networkAddFirewallRules(def, cfg->firewallBackend) < 0) goto error; firewalRulesAdded = true; @@ -2064,7 +2065,7 @@ networkStartNetworkVirtual(virNetworkDriverState *driver, if (firewalRulesAdded && def->forward.type != VIR_NETWORK_FORWARD_OPEN) - networkRemoveFirewallRules(def); + networkRemoveFirewallRules(def, cfg->firewallBackend); virNetworkObjUnrefMacMap(obj); @@ -2076,7 +2077,8 @@ networkStartNetworkVirtual(virNetworkDriverState *driver, static int -networkShutdownNetworkVirtual(virNetworkObj *obj) +networkShutdownNetworkVirtual(virNetworkObj *obj, + virNetworkDriverConfig *cfg) { virNetworkDef *def = virNetworkObjGetDef(obj); pid_t dnsmasqPid; @@ -2102,7 +2104,7 @@ networkShutdownNetworkVirtual(virNetworkObj *obj) ignore_value(virNetDevSetOnline(def->bridge, false)); if (def->forward.type != VIR_NETWORK_FORWARD_OPEN) - networkRemoveFirewallRules(def); + networkRemoveFirewallRules(def, cfg->firewallBackend); ignore_value(virNetDevBridgeDelete(def->bridge)); @@ -2406,7 +2408,7 @@ networkShutdownNetwork(virNetworkDriverState *driver, case VIR_NETWORK_FORWARD_NAT: case VIR_NETWORK_FORWARD_ROUTE: case VIR_NETWORK_FORWARD_OPEN: - ret = networkShutdownNetworkVirtual(obj); + ret = networkShutdownNetworkVirtual(obj, cfg); break; case VIR_NETWORK_FORWARD_BRIDGE: @@ -3257,7 +3259,7 @@ networkUpdate(virNetworkPtr net, * old rules (and remember to load new ones after the * update). */ - networkRemoveFirewallRules(def); + networkRemoveFirewallRules(def, cfg->firewallBackend); needFirewallRefresh = true; break; default: @@ -3285,14 +3287,14 @@ networkUpdate(virNetworkPtr net, parentIndex, xml, network_driver->xmlopt, flags) < 0) { if (needFirewallRefresh) - ignore_value(networkAddFirewallRules(def)); + ignore_value(networkAddFirewallRules(def, cfg->firewallBackend)); goto cleanup; } /* @def is replaced */ def = virNetworkObjGetDef(obj); - if (needFirewallRefresh && networkAddFirewallRules(def) < 0) + if (needFirewallRefresh && networkAddFirewallRules(def, cfg->firewallBackend) < 0) goto cleanup; if (flags & VIR_NETWORK_UPDATE_AFFECT_CONFIG) { diff --git a/src/network/bridge_driver_conf.c b/src/network/bridge_driver_conf.c index a2edafa837..25cbbf8933 100644 --- a/src/network/bridge_driver_conf.c +++ b/src/network/bridge_driver_conf.c @@ -25,6 +25,7 @@ #include "datatypes.h" #include "virlog.h" #include "virerror.h" +#include "virfile.h" #include "virutil.h" #include "bridge_driver_conf.h" @@ -62,6 +63,7 @@ virNetworkLoadDriverConfig(virNetworkDriverConfig *cfg G_GNUC_UNUSED, const char *filename) { g_autoptr(virConf) conf = NULL; + g_autofree char *firewallBackendStr = NULL; /* if file doesn't exist or is unreadable, ignore the "error" */ if (access(filename, R_OK) == -1) @@ -73,6 +75,54 @@ virNetworkLoadDriverConfig(virNetworkDriverConfig *cfg G_GNUC_UNUSED, /* use virConfGetValue*(conf, ...) functions to read any settings into cfg */ + if (virConfGetValueString(conf, "firewall_backend", &firewallBackendStr) < 0) + return -1; + + if (firewallBackendStr) { + int backend = virFirewallBackendTypeFromString(firewallBackendStr); + + if (backend < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, + _("unknown value for 'firewall_backend' in network.conf: '%1$s'"), + firewallBackendStr); + return -1; + } + + cfg->firewallBackend = backend; + VIR_INFO("using firewall_backend setting from network.conf: '%s'", + virFirewallBackendTypeToString(cfg->firewallBackend)); + + } else { + + /* no .conf setting, so see what this host supports by looking + * for binaries used by the backends, and set accordingly. + */ + g_autofree char *iptablesInPath = NULL; + bool binaryFound = false; + + /* virFindFileInPath() uses g_find_program_in_path(), + * which allows absolute paths, and verifies that + * the file is executable. + */ +#if defined(FIREWALL_BACKEND_DEFAULT_IPTABLES) + if ((iptablesInPath = virFindFileInPath(IPTABLES))) { + cfg->firewallBackend = VIR_FIREWALL_BACKEND_IPTABLES; + binaryFound = true; + } +#else +# error "No usable firewall_backend was set in build options" +#endif + + if (!binaryFound) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("firewall_backend not set, and no usable backend auto-detected")); + return -1; + } + + VIR_INFO("using auto-detected firewall_backend: '%s'", + virFirewallBackendTypeToString(cfg->firewallBackend)); + } + return 0; } diff --git a/src/network/bridge_driver_conf.h b/src/network/bridge_driver_conf.h index 426c16198d..8f221f391e 100644 --- a/src/network/bridge_driver_conf.h +++ b/src/network/bridge_driver_conf.h @@ -26,6 +26,7 @@ #include "virdnsmasq.h" #include "virnetworkobj.h" #include "object_event.h" +#include "virfirewall.h" typedef struct _virNetworkDriverConfig virNetworkDriverConfig; struct _virNetworkDriverConfig { @@ -37,6 +38,8 @@ struct _virNetworkDriverConfig { char *stateDir; char *pidDir; char *dnsmasqStateDir; + + virFirewallBackend firewallBackend; }; G_DEFINE_AUTOPTR_CLEANUP_FUNC(virNetworkDriverConfig, virObjectUnref); diff --git a/src/network/bridge_driver_linux.c b/src/network/bridge_driver_linux.c index 4914d5c903..c2ef27f251 100644 --- a/src/network/bridge_driver_linux.c +++ b/src/network/bridge_driver_linux.c @@ -303,7 +303,8 @@ int networkCheckRouteCollision(virNetworkDef *def) int -networkAddFirewallRules(virNetworkDef *def) +networkAddFirewallRules(virNetworkDef *def, + virFirewallBackend firewallBackend G_GNUC_UNUSED) { if (virOnce(&createdOnce, networkSetupPrivateChains) < 0) return -1; @@ -394,7 +395,8 @@ networkAddFirewallRules(virNetworkDef *def) void -networkRemoveFirewallRules(virNetworkDef *def) +networkRemoveFirewallRules(virNetworkDef *def, + virFirewallBackend firewallBackend G_GNUC_UNUSED) { iptablesRemoveFirewallRules(def); } diff --git a/src/network/bridge_driver_nop.c b/src/network/bridge_driver_nop.c index 6eee6043e6..7d9a061e50 100644 --- a/src/network/bridge_driver_nop.c +++ b/src/network/bridge_driver_nop.c @@ -36,11 +36,13 @@ int networkCheckRouteCollision(virNetworkDef *def G_GNUC_UNUSED) return 0; } -int networkAddFirewallRules(virNetworkDef *def G_GNUC_UNUSED) +int networkAddFirewallRules(virNetworkDef *def G_GNUC_UNUSED, + virFirewallBackend firewallBackend G_GNUC_UNUSED) { return 0; } -void networkRemoveFirewallRules(virNetworkDef *def G_GNUC_UNUSED) +void networkRemoveFirewallRules(virNetworkDef *def G_GNUC_UNUSED, + virFirewallBackend firewallBackend G_GNUC_UNUSED) { } diff --git a/src/network/bridge_driver_platform.h b/src/network/bridge_driver_platform.h index b720d343be..7443c3129f 100644 --- a/src/network/bridge_driver_platform.h +++ b/src/network/bridge_driver_platform.h @@ -32,6 +32,8 @@ void networkPostReloadFirewallRules(bool startup); int networkCheckRouteCollision(virNetworkDef *def); -int networkAddFirewallRules(virNetworkDef *def); +int networkAddFirewallRules(virNetworkDef *def, + virFirewallBackend firewallBackend); -void networkRemoveFirewallRules(virNetworkDef *def); +void networkRemoveFirewallRules(virNetworkDef *def, + virFirewallBackend firewallBackend); diff --git a/src/network/libvirtd_network.aug b/src/network/libvirtd_network.aug index ae153d96a1..5d6d72dd92 100644 --- a/src/network/libvirtd_network.aug +++ b/src/network/libvirtd_network.aug @@ -22,11 +22,14 @@ module Libvirtd_network = let int_entry (kw:string) = [ key kw . value_sep . int_val ] let str_array_entry (kw:string) = [ key kw . value_sep . str_array_val ] + let firewall_backend_entry = str_entry "firewall_backend" + (* Each entry in the config is one of the following *) + let entry = firewall_backend_entry let comment = [ label "#comment" . del /#[ \t]*/ "# " . store /([^ \t\n][^\n]*)?/ . del /\n/ "\n" ] let empty = [ label "#empty" . eol ] - let record = indent . eol + let record = indent . entry . eol let lns = ( record | comment | empty ) * diff --git a/src/network/meson.build b/src/network/meson.build index 0336435862..c79a36da22 100644 --- a/src/network/meson.build +++ b/src/network/meson.build @@ -49,16 +49,34 @@ if conf.has('WITH_NETWORK') ], } + network_options_conf = configuration_data({ + 'FIREWALL_BACKEND': firewall_backend, + }) + network_conf = configure_file( input: 'network.conf.in', output: 'network.conf', - configuration: configmake_conf, + configuration: network_options_conf, ) + + network_options_hack_conf = configuration_data({ + 'FIREWALL_BACKEND': firewall_backend, + # This hack is necessary because the output file is going to be + # used as input for another configure_file() call later, which + # will take care of substituting @CONFIG@ with useful data + 'CONFIG': '@CONFIG@', + }) + test_libvirtd_network_aug_tmp = configure_file( + input: 'test_libvirtd_network.aug.in', + output: 'test_libvirtd_network.aug.tmp', + configuration: network_options_hack_conf, + ) + virt_conf_files += network_conf virt_aug_files += files('libvirtd_network.aug') virt_test_aug_files += { 'name': 'test_libvirtd_network.aug', - 'aug': files('test_libvirtd_network.aug.in'), + 'aug': test_libvirtd_network_aug_tmp, 'conf': network_conf, 'test_name': 'libvirtd_network', 'test_srcdir': meson.current_source_dir(), diff --git a/src/network/network.conf.in b/src/network/network.conf.in index 5c84003f6d..ec75e125d8 100644 --- a/src/network/network.conf.in +++ b/src/network/network.conf.in @@ -1,3 +1,11 @@ # Master configuration file for the network driver. # All settings described here are optional - if omitted, sensible # defaults are used. + +# firewall_backend: +# +# determines which subsystem to use to setup firewall packet +# filtering rules for virtual networks. Currently the only supported +# selection is "iptables". +# +#firewall_backend = "@FIREWALL_BACKEND@" diff --git a/src/network/test_libvirtd_network.aug.in b/src/network/test_libvirtd_network.aug.in index ffdca520ce..9e29a9192f 100644 --- a/src/network/test_libvirtd_network.aug.in +++ b/src/network/test_libvirtd_network.aug.in @@ -1,2 +1,5 @@ module Test_libvirtd_network = @CONFIG@ + + test Libvirtd_network.lns get conf = +{ "firewall_backend" = "@FIREWALL_BACKEND@" } diff --git a/tests/networkxml2firewalltest.c b/tests/networkxml2firewalltest.c index cb66a26294..3a9f409e2a 100644 --- a/tests/networkxml2firewalltest.c +++ b/tests/networkxml2firewalltest.c @@ -98,7 +98,7 @@ static int testCompareXMLToArgvFiles(const char *xml, if (!(def = virNetworkDefParse(NULL, xml, NULL, false))) return -1; - if (networkAddFirewallRules(def) < 0) + if (networkAddFirewallRules(def, VIR_FIREWALL_BACKEND_IPTABLES) < 0) return -1; actual = actualargv = virBufferContentAndReset(&buf); -- 2.44.0
On Thu, Apr 25, 2024 at 01:38:18AM -0400, Laine Stump wrote:
It still can have only one useful value ("iptables"), but once a 2nd value is supported, it will be selectable by setting "firewall_backend=nftables" in /etc/libvirt/network.conf.
If firewall_backend isn't set in network.conf, then libvirt will check to see if the iptables binary is present on the system and set firewallBackend to iptables - if no iptables binary is found, that is considered a fatal error (since no networks can be started anyway), so an error is logged and startup of the network driver fails.
NB: network.conf is itself created from network.conf.in at build time, and the advertised default setting of firewall_backend (in a commented out line) is set from the meson_options.txt setting "firewall_backend". This way the conf file will have correct information no matter what default backend is chosen at build time.
Signed-off-by: Laine Stump <laine@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> --- Changes from V2:
* make failure to find iptables during network driver init fatal
* recognize firewall_backend setting in meson_options.txt and propagate it through to:
* meson-config.h (along with a numeric constant FIREWALL_BACKEND_DEFAULT_IPTABLES, which can be used for conditional compilation) * network.conf - default setting and comments use @FIREWALL_BACKEND@ * test_libvirtd_network.aug.in so that default firewall backend for testing is set properly (this required calisthenics similar to qemu_user_group_hack_conf in the qemu driver's meson.build (see commit 64a7b8203bf)
meson.build | 5 +++ meson_options.txt | 1 + src/network/bridge_driver.c | 22 ++++++----- src/network/bridge_driver_conf.c | 50 ++++++++++++++++++++++++ src/network/bridge_driver_conf.h | 3 ++ src/network/bridge_driver_linux.c | 6 ++- src/network/bridge_driver_nop.c | 6 ++- src/network/bridge_driver_platform.h | 6 ++- src/network/libvirtd_network.aug | 5 ++- src/network/meson.build | 22 ++++++++++- src/network/network.conf.in | 8 ++++ src/network/test_libvirtd_network.aug.in | 3 ++ tests/networkxml2firewalltest.c | 2 +- 13 files changed, 119 insertions(+), 20 deletions(-)
diff --git a/src/network/bridge_driver_conf.c b/src/network/bridge_driver_conf.c index a2edafa837..25cbbf8933 100644 --- a/src/network/bridge_driver_conf.c +++ b/src/network/bridge_driver_conf.c @@ -25,6 +25,7 @@ #include "datatypes.h" #include "virlog.h" #include "virerror.h" +#include "virfile.h" #include "virutil.h" #include "bridge_driver_conf.h"
@@ -62,6 +63,7 @@ virNetworkLoadDriverConfig(virNetworkDriverConfig *cfg G_GNUC_UNUSED, const char *filename) { g_autoptr(virConf) conf = NULL; + g_autofree char *firewallBackendStr = NULL;
/* if file doesn't exist or is unreadable, ignore the "error" */ if (access(filename, R_OK) == -1)
Not visible, but here we are about to do 'return 0'. This means that if the config file doesn't exist at all, then none of this method below will run. The logic for detecting the "best" firewall backend in the "} else {" clause below will thus never run. So without a config file on disk, it will always implicitly get the iptables backend set. We should set all defaults upfront, which means detectnig nft vs iptables. Then set an override later when reading the config, if it exists.
@@ -73,6 +75,54 @@ virNetworkLoadDriverConfig(virNetworkDriverConfig *cfg G_GNUC_UNUSED,
/* use virConfGetValue*(conf, ...) functions to read any settings into cfg */
+ if (virConfGetValueString(conf, "firewall_backend", &firewallBackendStr) < 0) + return -1; + + if (firewallBackendStr) { + int backend = virFirewallBackendTypeFromString(firewallBackendStr); + + if (backend < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, + _("unknown value for 'firewall_backend' in network.conf: '%1$s'"), + firewallBackendStr); + return -1; + } + + cfg->firewallBackend = backend; + VIR_INFO("using firewall_backend setting from network.conf: '%s'", + virFirewallBackendTypeToString(cfg->firewallBackend)); + + } else { + + /* no .conf setting, so see what this host supports by looking + * for binaries used by the backends, and set accordingly. + */ + g_autofree char *iptablesInPath = NULL; + bool binaryFound = false; + + /* virFindFileInPath() uses g_find_program_in_path(), + * which allows absolute paths, and verifies that + * the file is executable. + */ +#if defined(FIREWALL_BACKEND_DEFAULT_IPTABLES)
Do we need this check ? It should always be set, and if not, it'll be a compile error anyway.
+ if ((iptablesInPath = virFindFileInPath(IPTABLES))) { + cfg->firewallBackend = VIR_FIREWALL_BACKEND_IPTABLES; + binaryFound = true; + } +#else +# error "No usable firewall_backend was set in build options" +#endif + + if (!binaryFound) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("firewall_backend not set, and no usable backend auto-detected")); + return -1; + } + + VIR_INFO("using auto-detected firewall_backend: '%s'", + virFirewallBackendTypeToString(cfg->firewallBackend)); + } + return 0; }
With regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|
On 4/25/24 12:30 PM, Daniel P. Berrangé wrote:
On Thu, Apr 25, 2024 at 01:38:18AM -0400, Laine Stump wrote:
It still can have only one useful value ("iptables"), but once a 2nd value is supported, it will be selectable by setting "firewall_backend=nftables" in /etc/libvirt/network.conf.
If firewall_backend isn't set in network.conf, then libvirt will check to see if the iptables binary is present on the system and set firewallBackend to iptables - if no iptables binary is found, that is considered a fatal error (since no networks can be started anyway), so an error is logged and startup of the network driver fails.
NB: network.conf is itself created from network.conf.in at build time, and the advertised default setting of firewall_backend (in a commented out line) is set from the meson_options.txt setting "firewall_backend". This way the conf file will have correct information no matter what default backend is chosen at build time.
Signed-off-by: Laine Stump <laine@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> --- Changes from V2:
* make failure to find iptables during network driver init fatal
* recognize firewall_backend setting in meson_options.txt and propagate it through to:
* meson-config.h (along with a numeric constant FIREWALL_BACKEND_DEFAULT_IPTABLES, which can be used for conditional compilation) * network.conf - default setting and comments use @FIREWALL_BACKEND@ * test_libvirtd_network.aug.in so that default firewall backend for testing is set properly (this required calisthenics similar to qemu_user_group_hack_conf in the qemu driver's meson.build (see commit 64a7b8203bf)
meson.build | 5 +++ meson_options.txt | 1 + src/network/bridge_driver.c | 22 ++++++----- src/network/bridge_driver_conf.c | 50 ++++++++++++++++++++++++ src/network/bridge_driver_conf.h | 3 ++ src/network/bridge_driver_linux.c | 6 ++- src/network/bridge_driver_nop.c | 6 ++- src/network/bridge_driver_platform.h | 6 ++- src/network/libvirtd_network.aug | 5 ++- src/network/meson.build | 22 ++++++++++- src/network/network.conf.in | 8 ++++ src/network/test_libvirtd_network.aug.in | 3 ++ tests/networkxml2firewalltest.c | 2 +- 13 files changed, 119 insertions(+), 20 deletions(-)
diff --git a/src/network/bridge_driver_conf.c b/src/network/bridge_driver_conf.c index a2edafa837..25cbbf8933 100644 --- a/src/network/bridge_driver_conf.c +++ b/src/network/bridge_driver_conf.c @@ -25,6 +25,7 @@ #include "datatypes.h" #include "virlog.h" #include "virerror.h" +#include "virfile.h" #include "virutil.h" #include "bridge_driver_conf.h"
@@ -62,6 +63,7 @@ virNetworkLoadDriverConfig(virNetworkDriverConfig *cfg G_GNUC_UNUSED, const char *filename) { g_autoptr(virConf) conf = NULL; + g_autofree char *firewallBackendStr = NULL;
/* if file doesn't exist or is unreadable, ignore the "error" */ if (access(filename, R_OK) == -1)
Not visible, but here we are about to do 'return 0'.
This means that if the config file doesn't exist at all, then none of this method below will run.
The logic for detecting the "best" firewall backend in the "} else {" clause below will thus never run. So without a config file on disk, it will always implicitly get the iptables backend set.
oops. I hadn't noticed that since I always have a config file.
We should set all defaults upfront, which means detectnig nft vs iptables. Then set an override later when reading the config, if it exists.
Okay, how about this: 1) check for the existence of both backends and save that in a couple of bools. 2) based on the the results of (1) plus meson_options.txt (or meson commandline) setting of firewall_backend, do a preliminary setting of backend (or fail if neither is found). 3) If the config file has a firewall_backend setting, look at the results of (1) to make sure it's available, and set that (if it's *not* available, do we fail? Or ignore? I'm inclined to say fail)
@@ -73,6 +75,54 @@ virNetworkLoadDriverConfig(virNetworkDriverConfig *cfg G_GNUC_UNUSED,
/* use virConfGetValue*(conf, ...) functions to read any settings into cfg */
+ if (virConfGetValueString(conf, "firewall_backend", &firewallBackendStr) < 0) + return -1; + + if (firewallBackendStr) { + int backend = virFirewallBackendTypeFromString(firewallBackendStr); + + if (backend < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, + _("unknown value for 'firewall_backend' in network.conf: '%1$s'"), + firewallBackendStr); + return -1; + } + + cfg->firewallBackend = backend; + VIR_INFO("using firewall_backend setting from network.conf: '%s'", + virFirewallBackendTypeToString(cfg->firewallBackend)); + + } else { + + /* no .conf setting, so see what this host supports by looking + * for binaries used by the backends, and set accordingly. + */ + g_autofree char *iptablesInPath = NULL; + bool binaryFound = false; + + /* virFindFileInPath() uses g_find_program_in_path(), + * which allows absolute paths, and verifies that + * the file is executable. + */ +#if defined(FIREWALL_BACKEND_DEFAULT_IPTABLES)
Do we need this check ? It should always be set, and if not, it'll be a compile error anyway.
The way the logic in meson.build works, it looks at the setting of firewall_backend, and if that is "iptables" then it adds #define FIREWALL_BACKEND_DEFAULT_IPTABLES to meson-config.h, or if it's set to "nftables" then it adds #define FIREWALL_BACKEND_DEFAULT_NFTABLES (the name in the #elif should have been ...NFTABLES, as I discovered last night right after sending the patch mails - I hadn't received back any of the mails to be able reply to myself then, so it had to wait until this morning (I was already way too late getting to bed, so didn't want to wait around any longer :-)) This all feels rather "hacky" (both because the FIREWALL_BACKEND_DEFAULT_* constants are derived from the string setting of firewall_backend, and also because the conditionally compiled code is (short but) duplicated. But it was the simplest way I could see to get conditional compilation of the order of the checks rather than needing to do a string compare of the constant FIREWALL_BACKEND at runtime (since C preprocessor expressions can't do string compares). If someone wants to point out the obvious simple solution that I'm refusing to see, I'd be happy to do that instead! (I don't want to require the person doing the build to have to manually set more than a single option, and the name of the backend seems like the simplest)
+ if ((iptablesInPath = virFindFileInPath(IPTABLES))) { + cfg->firewallBackend = VIR_FIREWALL_BACKEND_IPTABLES; + binaryFound = true; + } +#else +# error "No usable firewall_backend was set in build options" +#endif + + if (!binaryFound) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("firewall_backend not set, and no usable backend auto-detected")); + return -1; + } + + VIR_INFO("using auto-detected firewall_backend: '%s'", + virFirewallBackendTypeToString(cfg->firewallBackend)); + } + return 0; }
With regards, Daniel
On Thu, Apr 25, 2024 at 01:04:10PM -0400, Laine Stump wrote:
On 4/25/24 12:30 PM, Daniel P. Berrangé wrote:
On Thu, Apr 25, 2024 at 01:38:18AM -0400, Laine Stump wrote:
It still can have only one useful value ("iptables"), but once a 2nd value is supported, it will be selectable by setting "firewall_backend=nftables" in /etc/libvirt/network.conf.
If firewall_backend isn't set in network.conf, then libvirt will check to see if the iptables binary is present on the system and set firewallBackend to iptables - if no iptables binary is found, that is considered a fatal error (since no networks can be started anyway), so an error is logged and startup of the network driver fails.
NB: network.conf is itself created from network.conf.in at build time, and the advertised default setting of firewall_backend (in a commented out line) is set from the meson_options.txt setting "firewall_backend". This way the conf file will have correct information no matter what default backend is chosen at build time.
Signed-off-by: Laine Stump <laine@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> --- Changes from V2:
* make failure to find iptables during network driver init fatal
* recognize firewall_backend setting in meson_options.txt and propagate it through to:
* meson-config.h (along with a numeric constant FIREWALL_BACKEND_DEFAULT_IPTABLES, which can be used for conditional compilation) * network.conf - default setting and comments use @FIREWALL_BACKEND@ * test_libvirtd_network.aug.in so that default firewall backend for testing is set properly (this required calisthenics similar to qemu_user_group_hack_conf in the qemu driver's meson.build (see commit 64a7b8203bf)
meson.build | 5 +++ meson_options.txt | 1 + src/network/bridge_driver.c | 22 ++++++----- src/network/bridge_driver_conf.c | 50 ++++++++++++++++++++++++ src/network/bridge_driver_conf.h | 3 ++ src/network/bridge_driver_linux.c | 6 ++- src/network/bridge_driver_nop.c | 6 ++- src/network/bridge_driver_platform.h | 6 ++- src/network/libvirtd_network.aug | 5 ++- src/network/meson.build | 22 ++++++++++- src/network/network.conf.in | 8 ++++ src/network/test_libvirtd_network.aug.in | 3 ++ tests/networkxml2firewalltest.c | 2 +- 13 files changed, 119 insertions(+), 20 deletions(-)
diff --git a/src/network/bridge_driver_conf.c b/src/network/bridge_driver_conf.c index a2edafa837..25cbbf8933 100644 --- a/src/network/bridge_driver_conf.c +++ b/src/network/bridge_driver_conf.c @@ -25,6 +25,7 @@ #include "datatypes.h" #include "virlog.h" #include "virerror.h" +#include "virfile.h" #include "virutil.h" #include "bridge_driver_conf.h" @@ -62,6 +63,7 @@ virNetworkLoadDriverConfig(virNetworkDriverConfig *cfg G_GNUC_UNUSED, const char *filename) { g_autoptr(virConf) conf = NULL; + g_autofree char *firewallBackendStr = NULL; /* if file doesn't exist or is unreadable, ignore the "error" */ if (access(filename, R_OK) == -1)
Not visible, but here we are about to do 'return 0'.
This means that if the config file doesn't exist at all, then none of this method below will run.
The logic for detecting the "best" firewall backend in the "} else {" clause below will thus never run. So without a config file on disk, it will always implicitly get the iptables backend set.
oops. I hadn't noticed that since I always have a config file.
We should set all defaults upfront, which means detectnig nft vs iptables. Then set an override later when reading the config, if it exists.
Okay, how about this:
1) check for the existence of both backends and save that in a couple of bools.
2) based on the the results of (1) plus meson_options.txt (or meson commandline) setting of firewall_backend, do a preliminary setting of backend (or fail if neither is found).
Yes, fail if neither is present.
3) If the config file has a firewall_backend setting, look at the results of (1) to make sure it's available, and set that (if it's *not* available, do we fail? Or ignore? I'm inclined to say fail)
Yes, fail if user's request choice is not available.
+ } else { + + /* no .conf setting, so see what this host supports by looking + * for binaries used by the backends, and set accordingly. + */ + g_autofree char *iptablesInPath = NULL; + bool binaryFound = false; + + /* virFindFileInPath() uses g_find_program_in_path(), + * which allows absolute paths, and verifies that + * the file is executable. + */ +#if defined(FIREWALL_BACKEND_DEFAULT_IPTABLES)
Do we need this check ? It should always be set, and if not, it'll be a compile error anyway.
The way the logic in meson.build works, it looks at the setting of firewall_backend, and if that is "iptables" then it adds
#define FIREWALL_BACKEND_DEFAULT_IPTABLES
to meson-config.h, or if it's set to "nftables" then it adds
#define FIREWALL_BACKEND_DEFAULT_NFTABLES
(the name in the #elif should have been ...NFTABLES, as I discovered last night right after sending the patch mails - I hadn't received back any of the mails to be able reply to myself then, so it had to wait until this morning (I was already way too late getting to bed, so didn't want to wait around any longer :-))
This all feels rather "hacky" (both because the FIREWALL_BACKEND_DEFAULT_* constants are derived from the string setting of firewall_backend, and also because the conditionally compiled code is (short but) duplicated. But it was the simplest way I could see to get conditional compilation of the order of the checks rather than needing to do a string compare of the constant FIREWALL_BACKEND at runtime (since C preprocessor expressions can't do string compares). If someone wants to point out the obvious simple solution that I'm refusing to see, I'd be happy to do that instead! (I don't want to require the person doing the build to have to manually set more than a single option, and the name of the backend seems like the simplest)
Get meson to set #define NETWORK_FIREWALL_BACKND VIR_FIREWALL_BACKEND_IPTABLES or #define NETWORK_FIREWALL_BACKND VIR_FIREWALL_BACKEND_NFTABLES so you can just use the defined value directly With regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|
Modify networkSetupPrivateChains() in the network driver to accept a firewallBackend argument so it will know which backend to call. (right now it always calls the iptables version of the lower level function, but in the future it could instead call the nftables version based on configuration). But networkSetupPrivateChains() was being called with virOnce(), and virOnce() doesn't support calling functions that require an argument (it's based on pthread_once(), which accepts no arguments, so it's not something we can easily fix in our implementation of virOnce()). To solve this dilemma, this patch eliminates use of virOnce() by adding a static lock, and putting all of networkSetupPrivateChains() (including the setting of "chainInitDone") inside a lock guard - now the places that used to call it via virOnce() can safely call it directly instead (adding in the necessary argument to specify backend). (If it turns out to be significant, we could optimize this by checking for chainInitDone outside the lock guard, returning immediately if it's already set, and then moving the setting of chainInitDone up to the top of the guarded section.) Signed-off-by: Laine Stump <laine@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> --- Change from V2: * remove use of VIR_FIREWALL_BACKEND_UNSET * use virReportEnumRangeError() when a virFirewallBackend is out of range. src/network/bridge_driver_linux.c | 57 +++++++++++++++++++++---------- 1 file changed, 39 insertions(+), 18 deletions(-) diff --git a/src/network/bridge_driver_linux.c b/src/network/bridge_driver_linux.c index c2ef27f251..988362abef 100644 --- a/src/network/bridge_driver_linux.c +++ b/src/network/bridge_driver_linux.c @@ -34,25 +34,45 @@ VIR_LOG_INIT("network.bridge_driver_linux"); #define PROC_NET_ROUTE "/proc/net/route" -static virOnceControl createdOnce; +static virMutex chainInitLock = VIR_MUTEX_INITIALIZER; static bool chainInitDone; /* true iff networkSetupPrivateChains was ever called */ static virErrorPtr errInitV4; static virErrorPtr errInitV6; -/* Usually only called via virOnce, but can also be called directly in - * response to firewalld reload (if chainInitDone == true) - */ -static void networkSetupPrivateChains(void) + +static int +networkFirewallSetupPrivateChains(virFirewallBackend backend, + virFirewallLayer layer) +{ + switch (backend) { + case VIR_FIREWALL_BACKEND_IPTABLES: + return iptablesSetupPrivateChains(layer); + + case VIR_FIREWALL_BACKEND_LAST: + virReportEnumRangeError(virFirewallBackend, backend); + return -1; + } + return 0; +} + + +static void +networkSetupPrivateChains(virFirewallBackend backend, + bool force) { + VIR_LOCK_GUARD lock = virLockGuardLock(&chainInitLock); int rc; + if (chainInitDone && !force) + return; + VIR_DEBUG("Setting up global firewall chains"); g_clear_pointer(&errInitV4, virFreeError); g_clear_pointer(&errInitV6, virFreeError); - rc = iptablesSetupPrivateChains(VIR_FIREWALL_LAYER_IPV4); + rc = networkFirewallSetupPrivateChains(backend, VIR_FIREWALL_LAYER_IPV4); if (rc < 0) { VIR_DEBUG("Failed to create global IPv4 chains: %s", virGetLastErrorMessage()); @@ -65,7 +85,7 @@ static void networkSetupPrivateChains(void) VIR_DEBUG("Global IPv4 chains already exist"); } - rc = iptablesSetupPrivateChains(VIR_FIREWALL_LAYER_IPV6); + rc = networkFirewallSetupPrivateChains(backend, VIR_FIREWALL_LAYER_IPV6); if (rc < 0) { VIR_DEBUG("Failed to create global IPv6 chains: %s", virGetLastErrorMessage()); @@ -138,6 +158,7 @@ networkPreReloadFirewallRules(virNetworkDriverState *driver, bool startup G_GNUC_UNUSED, bool force) { + g_autoptr(virNetworkDriverConfig) cfg = virNetworkDriverGetConfig(driver); /* * If there are any running networks, we need to * create the global rules upfront. This allows us @@ -157,14 +178,14 @@ networkPreReloadFirewallRules(virNetworkDriverState *driver, */ if (chainInitDone && force) { /* The Private chains have already been initialized once - * during this run of libvirtd, so 1) we can't do it again via - * virOnce(), and 2) we need to re-add the private chains even - * if there are currently no running networks, because the - * next time a network is started, libvirt will expect that - * the chains have already been added. So we call directly - * instead of via virOnce(). + * during this run of libvirtd/virtnetworkd (known because + * chainInitDone == true) so we need to re-add the private + * chains even if there are currently no running networks, + * because the next time a network is started, libvirt will + * expect that the chains have already been added. So we force + * the init. */ - networkSetupPrivateChains(); + networkSetupPrivateChains(cfg->firewallBackend, true); } else { if (!networkHasRunningNetworksWithFW(driver)) { @@ -172,7 +193,7 @@ networkPreReloadFirewallRules(virNetworkDriverState *driver, return; } - ignore_value(virOnce(&createdOnce, networkSetupPrivateChains)); + networkSetupPrivateChains(cfg->firewallBackend, false); } } @@ -304,10 +325,10 @@ int networkCheckRouteCollision(virNetworkDef *def) int networkAddFirewallRules(virNetworkDef *def, - virFirewallBackend firewallBackend G_GNUC_UNUSED) + virFirewallBackend firewallBackend) { - if (virOnce(&createdOnce, networkSetupPrivateChains) < 0) - return -1; + + networkSetupPrivateChains(firewallBackend, false); if (errInitV4 && (virNetworkDefGetIPByIndex(def, AF_INET, 0) || -- 2.44.0
In the past virFirewall required all rollback commands for a group (those commands necessary to "undo" any rules that had been added in that group in case of a later failure) to be manually added by switching into the virFirewall object into "rollback mode" and then re-calling the inverse of the exact virFirewallAddCmd*() APIs that had been called to add the original rules (ie. for each "iptables --insert" command, for rollback we would need to add a command with all arguments identical except that "--insert" would be replaced by "--delete"). Because nftables can't search for rules to remove by comparing all the arguments (it instead expects *only* a handle that is provided via stdout when the rule was originally added), we won't be able to follow the iptables method and manually construct the command to undo any given nft command by just duplicating all the args of the command (except the action). Instead we will need to be able to automatically create a rollback command at the time the rule-adding command is executed (e.g. an "nft delete rule" command that would include the rule handle returned in stdout by an "nft add rule" command). In order to make this happen, we need to be able to 1) learn whether the user of the virFirewall API desires this behavior (handled by a new transaction flag called VIR_FIREWALL_TRANSACTION_AUTO_ROLLBACK that can be retrieved with the new virFirewallTransactionGetFlags() API), and 2) add a new command to the current group's rollback command list (with the new virFirewallAddRollbackCmd()). We will actually use this capability in an upcoming patch. Signed-off-by: Laine Stump <laine@redhat.com> --- src/libvirt_private.syms | 1 + src/util/virfirewall.c | 55 +++++++++++++++++++++++++++++++++++----- src/util/virfirewall.h | 7 +++++ 3 files changed, 57 insertions(+), 6 deletions(-) diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 457b51e289..b3cbe1a833 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -2404,6 +2404,7 @@ virFileCacheSetPriv; # util/virfirewall.h virFirewallAddCmdFull; +virFirewallAddRollbackCmd; virFirewallApply; virFirewallBackendTypeFromString; virFirewallBackendTypeToString; diff --git a/src/util/virfirewall.c b/src/util/virfirewall.c index 77de34533d..9def8999d5 100644 --- a/src/util/virfirewall.c +++ b/src/util/virfirewall.c @@ -198,10 +198,12 @@ void virFirewallFree(virFirewall *firewall) fwCmd->args[fwCmd->argsLen++] = g_strdup(str); \ } while (0) + static virFirewallCmd * virFirewallAddCmdFullV(virFirewall *firewall, virFirewallLayer layer, bool ignoreErrors, + bool isRollback, virFirewallQueryCallback cb, void *opaque, va_list args) @@ -218,18 +220,16 @@ virFirewallAddCmdFullV(virFirewall *firewall, } group = firewall->groups[firewall->currentGroup]; - fwCmd = g_new0(virFirewallCmd, 1); - fwCmd->layer = layer; - fwCmd->queryCB = cb; - fwCmd->queryOpaque = opaque; while ((str = va_arg(args, char *)) != NULL) ADD_ARG(fwCmd, str); - if (group->addingRollback) { + if (isRollback || group->addingRollback) { fwCmd->ignoreErrors = true; /* always ignore errors when rolling back */ + fwCmd->queryCB = NULL; /* rollback commands can't have a callback */ + fwCmd->queryOpaque = NULL; VIR_APPEND_ELEMENT_COPY(group->rollback, group->nrollback, fwCmd); } else { /* when not rolling back, ignore errors if this group (transaction) @@ -237,6 +237,8 @@ virFirewallAddCmdFullV(virFirewall *firewall, * if this specific rule was created with ignoreErrors == true */ fwCmd->ignoreErrors = ignoreErrors || (group->actionFlags & VIR_FIREWALL_TRANSACTION_IGNORE_ERRORS); + fwCmd->queryCB = cb; + fwCmd->queryOpaque = opaque; VIR_APPEND_ELEMENT_COPY(group->action, group->naction, fwCmd); } @@ -277,7 +279,33 @@ virFirewallCmd *virFirewallAddCmdFull(virFirewall *firewall, virFirewallCmd *fwCmd; va_list args; va_start(args, opaque); - fwCmd = virFirewallAddCmdFullV(firewall, layer, ignoreErrors, cb, opaque, args); + fwCmd = virFirewallAddCmdFullV(firewall, layer, ignoreErrors, false, cb, opaque, args); + va_end(args); + return fwCmd; +} + + +/** + * virFirewallAddRollbackCmd: + * @firewall: firewall commands to add to + * @layer: the firewall layer to change + * @...: NULL terminated list of strings for the command + * + * Add a command to the current firewall command group "rollback". + * Rollback commands always ignore errors and don't support any + * callbacks. + * + * Returns the new Command + */ +virFirewallCmd * +virFirewallAddRollbackCmd(virFirewall *firewall, + virFirewallLayer layer, + ...) +{ + virFirewallCmd *fwCmd; + va_list args; + va_start(args, layer); + fwCmd = virFirewallAddCmdFullV(firewall, layer, true, true, NULL, NULL, args); va_end(args); return fwCmd; } @@ -434,6 +462,21 @@ void virFirewallStartTransaction(virFirewall *firewall, firewall->currentGroup = firewall->ngroups - 1; } + +/** + * virFirewallTransactionGetFlags: + * @firewall: the firewall to look at + * + * Returns the virFirewallTransactionFlags for the currently active + * group (transaction) in @firewall. + */ +static virFirewallTransactionFlags G_GNUC_UNUSED +virFirewallTransactionGetFlags(virFirewall *firewall) +{ + return firewall->groups[firewall->currentGroup]->actionFlags; +} + + /** * virFirewallBeginRollback: * @firewall: the firewall ruleset diff --git a/src/util/virfirewall.h b/src/util/virfirewall.h index 1ca1cce10a..e6aac365f1 100644 --- a/src/util/virfirewall.h +++ b/src/util/virfirewall.h @@ -73,6 +73,11 @@ virFirewallCmd *virFirewallAddCmdFull(virFirewall *firewall, ...) G_GNUC_NULL_TERMINATED; +virFirewallCmd *virFirewallAddRollbackCmd(virFirewall *firewall, + virFirewallLayer layer, + ...) + G_GNUC_NULL_TERMINATED; + void virFirewallRemoveCmd(virFirewall *firewall, virFirewallCmd *rule); @@ -105,6 +110,8 @@ typedef enum { /* Ignore all errors when applying rules, so no * rollback block will be required */ VIR_FIREWALL_TRANSACTION_IGNORE_ERRORS = (1 << 0), + /* Set to auto-add a rollback rule for each rule that is applied */ + VIR_FIREWALL_TRANSACTION_AUTO_ROLLBACK = (1 << 1), } virFirewallTransactionFlags; void virFirewallStartTransaction(virFirewall *firewall, -- 2.44.0
If the VIR_FIREWALL_TRANSACTION_AUTO_ROLLBACK flag is set, each time an iptables command is executed that is adding a rule or chain, a corresponding command that will *delete* the same rule/chain is constructed and added to the list of rollback commands. If we later want to undo the entire firewall, we can just run those commands. This isn't yet used anywhere, since VIR_FIREWALL_TRANSACTION_AUTO_ROLLBACK isn't being set. Signed-off-by: Laine Stump <laine@redhat.com> --- Change from V2: * change VIR_IPTABLES_ARG_IS_INSERT to VIR_IPTABLES_ARG_IS_CREATE src/util/virfirewall.c | 55 ++++++++++++++++++++++++++++++++++++------ 1 file changed, 48 insertions(+), 7 deletions(-) diff --git a/src/util/virfirewall.c b/src/util/virfirewall.c index 9def8999d5..b9b4140ad6 100644 --- a/src/util/virfirewall.c +++ b/src/util/virfirewall.c @@ -470,7 +470,7 @@ void virFirewallStartTransaction(virFirewall *firewall, * Returns the virFirewallTransactionFlags for the currently active * group (transaction) in @firewall. */ -static virFirewallTransactionFlags G_GNUC_UNUSED +static virFirewallTransactionFlags virFirewallTransactionGetFlags(virFirewall *firewall) { return firewall->groups[firewall->currentGroup]->actionFlags; @@ -525,16 +525,25 @@ virFirewallCmdToString(const char *cmd, } +#define VIR_IPTABLES_ARG_IS_CREATE(arg) \ + (STREQ(arg, "--insert") || STREQ(arg, "-I") || \ + STREQ(arg, "--append") || STREQ(arg, "-A")) + + static int -virFirewallApplyCmdDirect(virFirewallCmd *fwCmd, - char **output) +virFirewallCmdIptablesApply(virFirewall *firewall, + virFirewallCmd *fwCmd, + char **output) { - size_t i; const char *bin = virFirewallLayerCommandTypeToString(fwCmd->layer); + bool checkRollback = (virFirewallTransactionGetFlags(firewall) & + VIR_FIREWALL_TRANSACTION_AUTO_ROLLBACK); + bool needRollback = false; g_autoptr(virCommand) cmd = NULL; g_autofree char *cmdStr = NULL; - int status; g_autofree char *error = NULL; + size_t i; + int status; if (!bin) { virReportError(VIR_ERR_INTERNAL_ERROR, @@ -558,8 +567,13 @@ virFirewallApplyCmdDirect(virFirewallCmd *fwCmd, break; } - for (i = 0; i < fwCmd->argsLen; i++) + for (i = 0; i < fwCmd->argsLen; i++) { + /* the -I/-A arg could be at any position in the list */ + if (checkRollback && VIR_IPTABLES_ARG_IS_CREATE(fwCmd->args[i])) + needRollback = true; + virCommandAddArg(cmd, fwCmd->args[i]); + } cmdStr = virCommandToString(cmd, false); VIR_INFO("Running firewall command '%s'", NULLSTR(cmdStr)); @@ -571,8 +585,10 @@ virFirewallApplyCmdDirect(virFirewallCmd *fwCmd, return -1; if (status != 0) { + /* the command failed, decide whether or not to report it */ if (fwCmd->ignoreErrors) { VIR_DEBUG("Ignoring error running command"); + return 0; } else { virReportError(VIR_ERR_INTERNAL_ERROR, _("Failed to run firewall command %1$s: %2$s"), @@ -582,6 +598,31 @@ virFirewallApplyCmdDirect(virFirewallCmd *fwCmd, } } + /* the command was successful, see if we need to add a + * rollback command + */ + + if (needRollback) { + virFirewallCmd *rollback + = virFirewallAddRollbackCmd(firewall, fwCmd->layer, NULL); + g_autofree char *rollbackStr = NULL; + + for (i = 0; i < fwCmd->argsLen; i++) { + /* iptables --delete wants the entire commandline that + * was used for --insert but with s/insert/delete/ + */ + if (VIR_IPTABLES_ARG_IS_CREATE(fwCmd->args[i])) { + virFirewallCmdAddArg(firewall, rollback, "--delete"); + } else { + virFirewallCmdAddArg(firewall, rollback, fwCmd->args[i]); + } + } + + rollbackStr = virFirewallCmdToString(virFirewallLayerCommandTypeToString(fwCmd->layer), + rollback); + VIR_DEBUG("Recording Rollback command '%s'", NULLSTR(rollbackStr)); + } + return 0; } @@ -599,7 +640,7 @@ virFirewallApplyCmd(virFirewall *firewall, return -1; } - if (virFirewallApplyCmdDirect(fwCmd, &output) < 0) + if (virFirewallCmdIptablesApply(firewall, fwCmd, &output) < 0) return -1; if (fwCmd->queryCB && output) { -- 2.44.0
So far this will only affect what happens if there is some failure while applying the firewall rules; the rollback rules aren't yet persistent beyond that time. More work is needed to remember the rollback rules while the network is active, and use those rules to remove the firewall for the network when it is destroyed. Signed-off-by: Laine Stump <laine@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> --- Change from V2: * remove chunk checking for -ae option from firewalltest, and add it where it should be, in patch 25 src/network/network_iptables.c | 15 +++------------ 1 file changed, 3 insertions(+), 12 deletions(-) diff --git a/src/network/network_iptables.c b/src/network/network_iptables.c index db35a4c5a0..467d43c1e9 100644 --- a/src/network/network_iptables.c +++ b/src/network/network_iptables.c @@ -1599,7 +1599,7 @@ iptablesAddFirewallRules(virNetworkDef *def) virNetworkIPDef *ipdef; g_autoptr(virFirewall) fw = virFirewallNew(VIR_FIREWALL_BACKEND_IPTABLES); - virFirewallStartTransaction(fw, 0); + virFirewallStartTransaction(fw, VIR_FIREWALL_TRANSACTION_AUTO_ROLLBACK); iptablesAddGeneralFirewallRules(fw, def); @@ -1610,17 +1610,8 @@ iptablesAddFirewallRules(virNetworkDef *def) return -1; } - virFirewallStartRollback(fw, 0); - - for (i = 0; - (ipdef = virNetworkDefGetIPByIndex(def, AF_UNSPEC, i)); - i++) { - if (iptablesRemoveIPSpecificFirewallRules(fw, def, ipdef) < 0) - return -1; - } - iptablesRemoveGeneralFirewallRules(fw, def); - - virFirewallStartTransaction(fw, VIR_FIREWALL_TRANSACTION_IGNORE_ERRORS); + virFirewallStartTransaction(fw, (VIR_FIREWALL_TRANSACTION_IGNORE_ERRORS | + VIR_FIREWALL_TRANSACTION_AUTO_ROLLBACK)); iptablesAddChecksumFirewallRules(fw, def); return virFirewallApply(fw); -- 2.44.0
This will be used to label (via "name='blah'") a firewall when it is formatted to XML and written to the network status. Signed-off-by: Laine Stump <laine@redhat.com> --- This is new in V3. src/libvirt_private.syms | 2 ++ src/util/virfirewall.c | 20 +++++++++++++++++++- src/util/virfirewall.h | 2 ++ 3 files changed, 23 insertions(+), 1 deletion(-) diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index b3cbe1a833..9e16ae4225 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -2416,8 +2416,10 @@ virFirewallCmdGetArgCount; virFirewallCmdToString; virFirewallFree; virFirewallGetBackend; +virFirewallGetName; virFirewallNew; virFirewallRemoveCmd; +virFirewallSetName; virFirewallStartRollback; virFirewallStartTransaction; diff --git a/src/util/virfirewall.c b/src/util/virfirewall.c index b9b4140ad6..fe8c09c0ed 100644 --- a/src/util/virfirewall.c +++ b/src/util/virfirewall.c @@ -78,6 +78,7 @@ struct _virFirewallGroup { struct _virFirewall { int err; + char *name; size_t ngroups; virFirewallGroup **groups; size_t currentGroup; @@ -119,6 +120,22 @@ virFirewallGetBackend(virFirewall *firewall) } +const char * +virFirewallGetName(virFirewall *firewall) +{ + return firewall->name; +} + + +void +virFirewallSetName(virFirewall *firewall, + const char *name) +{ + g_free(firewall->name); + firewall->name = g_strdup(name); +} + + static void virFirewallCmdFree(virFirewallCmd *fwCmd) { @@ -169,8 +186,9 @@ void virFirewallFree(virFirewall *firewall) for (i = 0; i < firewall->ngroups; i++) virFirewallGroupFree(firewall->groups[i]); - g_free(firewall->groups); + g_free(firewall->groups); + g_free(firewall->name); g_free(firewall); } diff --git a/src/util/virfirewall.h b/src/util/virfirewall.h index e6aac365f1..e8ad81056f 100644 --- a/src/util/virfirewall.h +++ b/src/util/virfirewall.h @@ -46,6 +46,8 @@ VIR_ENUM_DECL(virFirewallBackend); virFirewall *virFirewallNew(virFirewallBackend backend); void virFirewallFree(virFirewall *firewall); virFirewallBackend virFirewallGetBackend(virFirewall *firewall); +const char *virFirewallGetName(virFirewall *firewall); +void virFirewallSetName(virFirewall *firewall, const char *name); /** * virFirewallAddCmd: -- 2.44.0
virFirewallNewFromRollback() creates a new virFirewall object that contains a copy of the "rollback" commands from an existing virFirewall object, but in reverse order. The intent is that this virFirewall be saved and used later to remove the firewall rules that were added for a network. Signed-off-by: Laine Stump <laine@redhat.com> --- src/libvirt_private.syms | 1 + src/util/virfirewall.c | 59 ++++++++++++++++++++++++++++++++++++++++ src/util/virfirewall.h | 1 + 3 files changed, 61 insertions(+) diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 9e16ae4225..42d2f9480f 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -2418,6 +2418,7 @@ virFirewallFree; virFirewallGetBackend; virFirewallGetName; virFirewallNew; +virFirewallNewFromRollback; virFirewallRemoveCmd; virFirewallSetName; virFirewallStartRollback; diff --git a/src/util/virfirewall.c b/src/util/virfirewall.c index fe8c09c0ed..2f4f128cd1 100644 --- a/src/util/virfirewall.c +++ b/src/util/virfirewall.c @@ -768,3 +768,62 @@ virFirewallApply(virFirewall *firewall) return 0; } + + +/** + * virFirewallNewFromRollback: + + * @original: the original virFirewall object containing the rollback + * of interest + * @fwRemoval: a firewall object that, when applied, will remove @original + * + * Copy the rollback rules from the current virFirewall object as a + * new virFirewall. This virFirewall can then be saved to apply later + * and counteract everything done by the original. + * + * Returns 0 on success, -1 on error + */ +int +virFirewallNewFromRollback(virFirewall *original, + virFirewall **fwRemoval) +{ + size_t g; + g_autoptr(virFirewall) firewall = NULL; + + if (original->err) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("error in original firewall object")); + return -1; + } + + firewall = virFirewallNew(original->backend); + + /* add the rollback commands in reverse order of actions/groups of + * what was applied in the original firewall. + */ + for (g = original->ngroups; g > 0; g--) { + size_t r; + virFirewallGroup *group = original->groups[g - 1]; + + if (group->nrollback == 0) + continue; + + virFirewallStartTransaction(firewall, VIR_FIREWALL_TRANSACTION_IGNORE_ERRORS); + + for (r = group->nrollback; r > 0; r--) { + size_t i; + virFirewallCmd *origCmd = group->rollback[r - 1]; + virFirewallCmd *rbCmd = virFirewallAddCmd(firewall, origCmd->layer, NULL); + + for (i = 0; i < origCmd->argsLen; i++) + ADD_ARG(rbCmd, origCmd->args[i]); + } + } + + if (firewall->ngroups == 0) + VIR_DEBUG("original firewall object is empty"); + else + *fwRemoval = g_steal_pointer(&firewall); + + return 0; +} diff --git a/src/util/virfirewall.h b/src/util/virfirewall.h index e8ad81056f..931dfb04cf 100644 --- a/src/util/virfirewall.h +++ b/src/util/virfirewall.h @@ -44,6 +44,7 @@ typedef enum { VIR_ENUM_DECL(virFirewallBackend); virFirewall *virFirewallNew(virFirewallBackend backend); +int virFirewallNewFromRollback(virFirewall *original, virFirewall **fwRemoval); void virFirewallFree(virFirewall *firewall); virFirewallBackend virFirewallGetBackend(virFirewall *firewall); const char *virFirewallGetName(virFirewall *firewall); -- 2.44.0
These functions convert a virFirewall object to/from XML so that it can be serialized to disk (in a virNetworkObj's status file) and restored later (e.g. after libvirtd/virtnetworkd is restarted). Signed-off-by: Laine Stump <laine@redhat.com> --- Change from V2: * report nargs == 0 as an error rather than ignoring, during firewall command parsing. src/libvirt_private.syms | 2 + src/util/virfirewall.c | 219 +++++++++++++++++++++++++++++++++++++++ src/util/virfirewall.h | 9 ++ 3 files changed, 230 insertions(+) diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 42d2f9480f..9ba1edb37e 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -2414,11 +2414,13 @@ virFirewallCmdAddArgList; virFirewallCmdAddArgSet; virFirewallCmdGetArgCount; virFirewallCmdToString; +virFirewallFormat; virFirewallFree; virFirewallGetBackend; virFirewallGetName; virFirewallNew; virFirewallNewFromRollback; +virFirewallParseXML; virFirewallRemoveCmd; virFirewallSetName; virFirewallStartRollback; diff --git a/src/util/virfirewall.c b/src/util/virfirewall.c index 2f4f128cd1..e08d503ac9 100644 --- a/src/util/virfirewall.c +++ b/src/util/virfirewall.c @@ -39,6 +39,14 @@ VIR_ENUM_IMPL(virFirewallBackend, VIR_FIREWALL_BACKEND_LAST, "iptables"); +VIR_ENUM_DECL(virFirewallLayer); +VIR_ENUM_IMPL(virFirewallLayer, + VIR_FIREWALL_LAYER_LAST, + "ethernet", + "ipv4", + "ipv6", +); + typedef struct _virFirewallGroup virFirewallGroup; VIR_ENUM_DECL(virFirewallLayerCommand); @@ -827,3 +835,214 @@ virFirewallNewFromRollback(virFirewall *original, return 0; } + + +/* virFirewallGetFlagsFromNode: + * @node: the xmlNode to check for an ignoreErrors attribute + * + * A short helper to get the setting of the ignorErrors attribute from + * an xmlNode. Returns -1 on error (with error reported), or the + * VIR_FIREWALL_TRANSACTION_IGNORE_ERRORS bit set/reset according to + * the value of the attribute. + */ +static int +virFirewallGetFlagsFromNode(xmlNodePtr node) +{ + virTristateBool ignoreErrors; + + if (virXMLPropTristateBool(node, "ignoreErrors", VIR_XML_PROP_NONE, &ignoreErrors) < 0) + return -1; + + if (ignoreErrors == VIR_TRISTATE_BOOL_YES) + return VIR_FIREWALL_TRANSACTION_IGNORE_ERRORS; + return 0; +} + + +/** + * virFirewallParseXML: + * @firewall: pointer to virFirewall* to fill in with new virFirewall object + * + * Construct a new virFirewall object according to the XML in + * xmlNodePtr. Return 0 (and new object) on success, or -1 (with + * error reported) on error. + * + * Example of <firewall> element XML: + * + * <firewall backend='iptables|nftables'> + * <group ignoreErrors='yes|no'> + * <action layer='ethernet|ipv4|ipv6' ignoreErrors='yes|no'> + * <args> + * <item>arg1</item> + * <item>arg2</item> + * ... + * </args> + * </action> + * <action ...> + * ... + </action> + * ... + * </group> + * ... + * </firewall> + */ +int +virFirewallParseXML(virFirewall **firewall, + xmlNodePtr node, + xmlXPathContextPtr ctxt) +{ + g_autoptr(virFirewall) newfw = NULL; + virFirewallBackend backend; + g_autofree xmlNodePtr *groupNodes = NULL; + ssize_t ngroups; + size_t g; + VIR_XPATH_NODE_AUTORESTORE(ctxt); + + ctxt->node = node; + + if (virXMLPropEnum(node, "backend", virFirewallBackendTypeFromString, + VIR_XML_PROP_REQUIRED, &backend) < 0) { + return -1; + } + + newfw = virFirewallNew(backend); + + newfw->name = virXMLPropString(node, "name"); + + ngroups = virXPathNodeSet("./group", ctxt, &groupNodes); + if (ngroups < 0) + return -1; + + for (g = 0; g < ngroups; g++) { + int flags = 0; + g_autofree xmlNodePtr *actionNodes = NULL; + ssize_t nactions; + size_t a; + + ctxt->node = groupNodes[g]; + nactions = virXPathNodeSet("./action", ctxt, &actionNodes); + if (nactions < 0) + return -1; + if (nactions == 0) + continue; + + if ((flags = virFirewallGetFlagsFromNode(groupNodes[g])) < 0) + return -1; + + virFirewallStartTransaction(newfw, flags); + + for (a = 0; a < nactions; a++) { + g_autofree xmlNodePtr *argsNodes = NULL; + ssize_t nargs; + size_t i; + virFirewallLayer layer; + virFirewallCmd *action; + bool ignoreErrors; + + ctxt->node = actionNodes[a]; + + if (!(ctxt->node = virXPathNode("./args", ctxt))) + continue; + + if ((flags = virFirewallGetFlagsFromNode(actionNodes[a])) < 0) + return -1; + + ignoreErrors = flags & VIR_FIREWALL_TRANSACTION_IGNORE_ERRORS; + + if (virXMLPropEnum(actionNodes[a], "layer", + virFirewallLayerTypeFromString, + VIR_XML_PROP_REQUIRED, &layer) < 0) { + return -1; + } + + nargs = virXPathNodeSet("./item", ctxt, &argsNodes); + if (nargs < 0) + return -1; + if (nargs == 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("Invalid firewall command has 0 arguments")); + return -1; + } + + action = virFirewallAddCmdFull(newfw, layer, ignoreErrors, + NULL, NULL, NULL); + for (i = 0; i < nargs; i++) { + + char *arg = virXMLNodeContentString(argsNodes[i]); + if (!arg) + return -1; + + virFirewallCmdAddArg(newfw, action, arg); + } + } + } + + *firewall = g_steal_pointer(&newfw); + return 0; +} + + +/** + * virFirewallFormat: + * @buf: output buffer + * @firewall: the virFirewall object to format as XML + * + * Format virFirewall object @firewall into @buf as XML. + * Returns 0 on success, -1 on failure. + * + */ +int +virFirewallFormat(virBuffer *buf, + virFirewall *firewall) +{ + size_t g; + g_auto(virBuffer) attrBuf = VIR_BUFFER_INITIALIZER; + g_auto(virBuffer) childBuf = VIR_BUFFER_INIT_CHILD(buf); + + virBufferEscapeString(&attrBuf, " name=%s", firewall->name); + virBufferAsprintf(&attrBuf, " backend='%s'", + virFirewallBackendTypeToString(virFirewallGetBackend(firewall))); + + for (g = 0; g < firewall->ngroups; g++) { + virFirewallGroup *group = firewall->groups[g]; + bool groupIgnoreErrors = (group->actionFlags & + VIR_FIREWALL_TRANSACTION_IGNORE_ERRORS); + size_t a; + + virBufferAddLit(&childBuf, "<group"); + if (groupIgnoreErrors) + virBufferAddLit(&childBuf, " ignoreErrors='yes'"); + virBufferAddLit(&childBuf, ">\n"); + virBufferAdjustIndent(&childBuf, 2); + + for (a = 0; a < group->naction; a++) { + virFirewallCmd *action = group->action[a]; + size_t i; + + virBufferAsprintf(&childBuf, "<action layer='%s'", + virFirewallLayerTypeToString(action->layer)); + /* if the entire group has ignoreErrors='yes', then it's + * redundant to have it for an action of the group + */ + if (action->ignoreErrors && !groupIgnoreErrors) + virBufferAddLit(&childBuf, " ignoreErrors='yes'"); + virBufferAddLit(&childBuf, ">\n"); + + virBufferAdjustIndent(&childBuf, 2); + virBufferAddLit(&childBuf, "<args>\n"); + virBufferAdjustIndent(&childBuf, 2); + for (i = 0; i < virFirewallCmdGetArgCount(action); i++) + virBufferEscapeString(&childBuf, "<item>%s</item>\n", action->args[i]); + virBufferAdjustIndent(&childBuf, -2); + virBufferAddLit(&childBuf, "</args>\n"); + virBufferAdjustIndent(&childBuf, -2); + virBufferAddLit(&childBuf, "</action>\n"); + } + + virBufferAdjustIndent(&childBuf, -2); + virBufferAddLit(&childBuf, "</group>\n"); + } + + virXMLFormatElement(buf, "firewall", &attrBuf, &childBuf); + return 0; +} diff --git a/src/util/virfirewall.h b/src/util/virfirewall.h index 931dfb04cf..917745c315 100644 --- a/src/util/virfirewall.h +++ b/src/util/virfirewall.h @@ -22,6 +22,8 @@ #include "internal.h" #include "virenum.h" +#include "virbuffer.h" +#include "virxml.h" typedef struct _virFirewall virFirewall; @@ -131,4 +133,11 @@ void virFirewallStartRollback(virFirewall *firewall, int virFirewallApply(virFirewall *firewall); +int virFirewallParseXML(virFirewall **firewall, + xmlNodePtr node, + xmlXPathContextPtr ctxt); + +int virFirewallFormat(virBuffer *buf, + virFirewall *firewall); + G_DEFINE_AUTOPTR_CLEANUP_FUNC(virFirewall, virFirewallFree); -- 2.44.0
This virFirewall object will store the list of actions required to remove the firewall that was added for the currently active instance of the network, so it has been named "fwRemoval" (and when parsed into XML, the <firewall> element will have the name "fwRemoval"). There are no uses of the fwRemoval object in the virNetworkObj yet, but everything is in place to add it to the XML when formatted, parse it from the XML when reading network status, and free the virFirewall object when the virNetworkObj is freed. Signed-off-by: Laine Stump <laine@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> --- Change from V2: * add name='fwRemoval' to the network status <firewall> so it can be positively identified in the XML src/conf/virnetworkobj.c | 46 ++++++++++++++++++++++++++++++++++++++++ src/conf/virnetworkobj.h | 11 ++++++++++ src/libvirt_private.syms | 3 +++ 3 files changed, 60 insertions(+) diff --git a/src/conf/virnetworkobj.c b/src/conf/virnetworkobj.c index d5aa121e20..fef4c69004 100644 --- a/src/conf/virnetworkobj.c +++ b/src/conf/virnetworkobj.c @@ -55,6 +55,11 @@ struct _virNetworkObj { unsigned int taint; + /* fwRemoval contains all commands needed to remove the firewall + * that was added for this network. + */ + virFirewall *fwRemoval; + /* Immutable pointer, self locking APIs */ virMacMap *macmap; @@ -239,6 +244,30 @@ virNetworkObjSetFloorSum(virNetworkObj *obj, } +virFirewall ** +virNetworkObjGetFwRemovalPtr(virNetworkObj *obj) +{ + return &obj->fwRemoval; +} + + +virFirewall * +virNetworkObjGetFwRemoval(virNetworkObj *obj) +{ + return obj->fwRemoval; +} + + +void +virNetworkObjSetFwRemoval(virNetworkObj *obj, + virFirewall *fwRemoval) +{ + obj->fwRemoval = fwRemoval; + /* give it a name so it's identifiable in the XML */ + virFirewallSetName(fwRemoval, "fwRemoval"); +} + + void virNetworkObjSetMacMap(virNetworkObj *obj, virMacMap **macmap) @@ -444,6 +473,7 @@ virNetworkObjDispose(void *opaque) virNetworkDefFree(obj->newDef); virBitmapFree(obj->classIdMap); virObjectUnref(obj->macmap); + virFirewallFree(obj->fwRemoval); } @@ -792,6 +822,9 @@ virNetworkObjFormat(virNetworkObj *obj, if (virNetworkDefFormatBuf(&buf, obj->def, xmlopt, flags) < 0) return NULL; + if (obj->fwRemoval && virFirewallFormat(&buf, obj->fwRemoval) < 0) + return NULL; + virBufferAdjustIndent(&buf, -2); virBufferAddLit(&buf, "</networkstatus>"); @@ -826,6 +859,7 @@ virNetworkLoadState(virNetworkObjList *nets, g_autofree char *configFile = NULL; g_autoptr(virNetworkDef) def = NULL; virNetworkObj *obj = NULL; + g_autoptr(virFirewall) fwRemoval = NULL; g_autoptr(xmlDoc) xml = NULL; xmlNodePtr node = NULL; g_autoptr(xmlXPathContext) ctxt = NULL; @@ -868,6 +902,7 @@ virNetworkLoadState(virNetworkObjList *nets, g_autofree char *classIdStr = NULL; g_autofree char *floor_sum = NULL; g_autofree xmlNodePtr *nodes = NULL; + xmlNodePtr fwNode; ctxt->node = node; if ((classIdStr = virXPathString("string(./class_id[1]/@bitmap)", @@ -902,6 +937,15 @@ virNetworkLoadState(virNetworkObjList *nets, taint |= (1 << flag); } } + if ((fwNode = virXPathNode("./firewall", ctxt))) { + g_autoptr(virFirewall) fwTmp = NULL; + + if (virFirewallParseXML(&fwTmp, fwNode, ctxt) < 0) + return NULL; + + if (STREQ_NULLABLE(virFirewallGetName(fwTmp), "fwRemoval")) + fwRemoval = g_steal_pointer(&fwTmp); + } } /* create the object */ @@ -910,6 +954,8 @@ virNetworkLoadState(virNetworkObjList *nets, def = NULL; + virNetworkObjSetFwRemoval(obj, g_steal_pointer(&fwRemoval)); + /* assign status data stored in the network object */ if (classIdMap) { virBitmapFree(obj->classIdMap); diff --git a/src/conf/virnetworkobj.h b/src/conf/virnetworkobj.h index d3847d3422..d35e495961 100644 --- a/src/conf/virnetworkobj.h +++ b/src/conf/virnetworkobj.h @@ -23,6 +23,7 @@ #include "network_conf.h" #include "virnetworkportdef.h" +#include "virfirewall.h" typedef struct _virNetworkObj virNetworkObj; @@ -76,6 +77,16 @@ void virNetworkObjSetFloorSum(virNetworkObj *obj, unsigned long long floor_sum); +virFirewall ** +virNetworkObjGetFwRemovalPtr(virNetworkObj *obj); + +virFirewall * +virNetworkObjGetFwRemoval(virNetworkObj *obj); + +void +virNetworkObjSetFwRemoval(virNetworkObj *obj, + virFirewall *fwRemoval); + void virNetworkObjSetMacMap(virNetworkObj *obj, virMacMap **macmap); diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 9ba1edb37e..83abbece4c 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -1300,6 +1300,8 @@ virNetworkObjGetClassIdMap; virNetworkObjGetDef; virNetworkObjGetDnsmasqPid; virNetworkObjGetFloorSum; +virNetworkObjGetFwRemoval; +virNetworkObjGetFwRemovalPtr; virNetworkObjGetMacMap; virNetworkObjGetMetadata; virNetworkObjGetNewDef; @@ -1331,6 +1333,7 @@ virNetworkObjSetDef; virNetworkObjSetDefTransient; virNetworkObjSetDnsmasqPid; virNetworkObjSetFloorSum; +virNetworkObjSetFwRemoval; virNetworkObjSetMacMap; virNetworkObjSetMetadata; virNetworkObjTaint; -- 2.44.0
On Thu, Apr 25, 2024 at 01:38:26AM -0400, Laine Stump wrote:
This virFirewall object will store the list of actions required to remove the firewall that was added for the currently active instance of the network, so it has been named "fwRemoval" (and when parsed into XML, the <firewall> element will have the name "fwRemoval").
There are no uses of the fwRemoval object in the virNetworkObj yet, but everything is in place to add it to the XML when formatted, parse it from the XML when reading network status, and free the virFirewall object when the virNetworkObj is freed.
Signed-off-by: Laine Stump <laine@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> --- Change from V2: * add name='fwRemoval' to the network status <firewall> so it can be positively identified in the XML
src/conf/virnetworkobj.c | 46 ++++++++++++++++++++++++++++++++++++++++ src/conf/virnetworkobj.h | 11 ++++++++++ src/libvirt_private.syms | 3 +++ 3 files changed, 60 insertions(+)
diff --git a/src/conf/virnetworkobj.c b/src/conf/virnetworkobj.c index d5aa121e20..fef4c69004 100644 --- a/src/conf/virnetworkobj.c +++ b/src/conf/virnetworkobj.c @@ -55,6 +55,11 @@ struct _virNetworkObj {
unsigned int taint;
+ /* fwRemoval contains all commands needed to remove the firewall + * that was added for this network. + */ + virFirewall *fwRemoval; + /* Immutable pointer, self locking APIs */ virMacMap *macmap;
@@ -239,6 +244,30 @@ virNetworkObjSetFloorSum(virNetworkObj *obj, }
+virFirewall ** +virNetworkObjGetFwRemovalPtr(virNetworkObj *obj) +{ + return &obj->fwRemoval; +} + + +virFirewall * +virNetworkObjGetFwRemoval(virNetworkObj *obj) +{ + return obj->fwRemoval; +} + + +void +virNetworkObjSetFwRemoval(virNetworkObj *obj, + virFirewall *fwRemoval) +{ + obj->fwRemoval = fwRemoval; + /* give it a name so it's identifiable in the XML */ + virFirewallSetName(fwRemoval, "fwRemoval"); +}
This call is segv'ing because 'fwRemoval' is NULL if you're starting virnetworkd from an existing host which is currently running old libvirt, as the FW rules won't be in the status XML file. I guess this pristine upgrade scenario is not present on your own machine. Just putting an 'if (fwRemoval)' around the SetName call seems like the right action. Unless you want to immediately synthesize a virFirewall object with historically accurate rollback rules when loading status XML. Might make later code simpler if you can rely on this being non-NULL ? With regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|
On 4/25/24 12:33 PM, Daniel P. Berrangé wrote:
On Thu, Apr 25, 2024 at 01:38:26AM -0400, Laine Stump wrote:
This virFirewall object will store the list of actions required to remove the firewall that was added for the currently active instance of the network, so it has been named "fwRemoval" (and when parsed into XML, the <firewall> element will have the name "fwRemoval").
There are no uses of the fwRemoval object in the virNetworkObj yet, but everything is in place to add it to the XML when formatted, parse it from the XML when reading network status, and free the virFirewall object when the virNetworkObj is freed.
Signed-off-by: Laine Stump <laine@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> --- Change from V2: * add name='fwRemoval' to the network status <firewall> so it can be positively identified in the XML
src/conf/virnetworkobj.c | 46 ++++++++++++++++++++++++++++++++++++++++ src/conf/virnetworkobj.h | 11 ++++++++++ src/libvirt_private.syms | 3 +++ 3 files changed, 60 insertions(+)
diff --git a/src/conf/virnetworkobj.c b/src/conf/virnetworkobj.c index d5aa121e20..fef4c69004 100644 --- a/src/conf/virnetworkobj.c +++ b/src/conf/virnetworkobj.c @@ -55,6 +55,11 @@ struct _virNetworkObj {
unsigned int taint;
+ /* fwRemoval contains all commands needed to remove the firewall + * that was added for this network. + */ + virFirewall *fwRemoval; + /* Immutable pointer, self locking APIs */ virMacMap *macmap;
@@ -239,6 +244,30 @@ virNetworkObjSetFloorSum(virNetworkObj *obj, }
+virFirewall ** +virNetworkObjGetFwRemovalPtr(virNetworkObj *obj) +{ + return &obj->fwRemoval; +} + + +virFirewall * +virNetworkObjGetFwRemoval(virNetworkObj *obj) +{ + return obj->fwRemoval; +} + + +void +virNetworkObjSetFwRemoval(virNetworkObj *obj, + virFirewall *fwRemoval) +{ + obj->fwRemoval = fwRemoval; + /* give it a name so it's identifiable in the XML */ + virFirewallSetName(fwRemoval, "fwRemoval"); +}
This call is segv'ing because 'fwRemoval' is NULL if you're starting virnetworkd from an existing host which is currently running old libvirt, as the FW rules won't be in the status XML file. I guess this pristine upgrade scenario is not present on your own machine.
Just putting an 'if (fwRemoval)' around the SetName call seems like the right action.
Yeah, I found that this morning and fixed it as well (exactly as you suggest). The danger of staying up late to finish something is that your brain *thinks* you retested everything after that last fix, but often you didn't :-/
Unless you want to immediately synthesize a virFirewall object with historically accurate rollback rules when loading status XML. Might make later code simpler if you can rely on this being non-NULL ?
Well, having that pointer NULL is significant, as that's how I tell the difference between "there was no fwRemoval in the status" (i.e. "use the old hardcoded method of removing an iptables firewall") and "there was an fwRemoval, but it was empty (i.e. "do nothing", which I'm assuming will be the case when I add in an update of egarver's support for native firewalld backend). Although I suppose that empty <firewall> would still have <firewall backend='firewalld'>, so maybe I don't need to differentiate.
When destroying a network, the network driver has always assumed that it knew what firewall rules had been added as the network was started. This was usually correct - I only recall one time in the past that the firewall rules added by libvirt were changed. But if the exact rules used for a network *were* ever changed from one build/version of libvirt to another, then we would end up attempting to remove rules that hadn't been added, and could possibly *not* remove rules that had been added. The solution to this to not make such brash assumptions about the past, but instead to save (in the network status object at network start time) a list of all the rules needed to remove the rules that were added for the network, and then use that saved list during network destroy to remove exactly what was previous added. Beyond making net-destroy more precise, there are other benefits: 1) We can change the details of the rules we add for networks from one build/release of libvirt to another and painlessly upgrade. 2) The user can switch from one firewall backend to another by simply changing the setting in network.conf and restarting libvirtd/virtnetworkd. In both cases, the restarted libvirtd/virtnetworkd will remove all the rules that had been previously added (based on the network status), and then add new rules (saving the new removal commands back into the network status) Signed-off-by: Laine Stump <laine@redhat.com> == NB: the current implementation saves only the commands necessary to remove the network's firewall, and names this <firewall> in the status XML. It would be simple to instead save the *entire* virFirewall object (thus also including the commands that were used to add the firewall, as well as the commands needed to remove it) - although very verbose, it's possible it could be useful when debugging a firewall issue (since it's not obvious which rules were added for which network when just looking at the output of "nft list ruleset". Alternately, we could continue to store only the removal commands, but maybe change the name of the element in XML from <firewall> to <fwRemoval> (which would leave the door open to expanding what is saved in the future). Any opinions on this? Signed-off-by: Laine Stump <laine@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> --- src/network/bridge_driver.c | 31 ++++++++++++-------- src/network/bridge_driver_linux.c | 26 +++++++++++++---- src/network/bridge_driver_nop.c | 6 ++-- src/network/bridge_driver_platform.h | 6 ++-- src/network/network_iptables.c | 43 +++++++++++++++++++++++++--- src/network/network_iptables.h | 2 +- tests/networkxml2firewalltest.c | 2 +- 7 files changed, 87 insertions(+), 29 deletions(-) diff --git a/src/network/bridge_driver.c b/src/network/bridge_driver.c index 38e4ab84ad..c54a595d4d 100644 --- a/src/network/bridge_driver.c +++ b/src/network/bridge_driver.c @@ -1696,8 +1696,9 @@ networkReloadFirewallRulesHelper(virNetworkObj *obj, * network type, forward='open', doesn't need this because it * has no iptables rules. */ - networkRemoveFirewallRules(def, cfg->firewallBackend); - ignore_value(networkAddFirewallRules(def, cfg->firewallBackend)); + networkRemoveFirewallRules(obj); + ignore_value(networkAddFirewallRules(def, cfg->firewallBackend, + virNetworkObjGetFwRemovalPtr(obj))); break; case VIR_NETWORK_FORWARD_OPEN: @@ -1949,8 +1950,10 @@ networkStartNetworkVirtual(virNetworkDriverState *driver, /* Add "once per network" rules */ if (def->forward.type != VIR_NETWORK_FORWARD_OPEN && - networkAddFirewallRules(def, cfg->firewallBackend) < 0) + networkAddFirewallRules(def, cfg->firewallBackend, + virNetworkObjGetFwRemovalPtr(obj)) < 0) { goto error; + } firewalRulesAdded = true; @@ -2065,7 +2068,7 @@ networkStartNetworkVirtual(virNetworkDriverState *driver, if (firewalRulesAdded && def->forward.type != VIR_NETWORK_FORWARD_OPEN) - networkRemoveFirewallRules(def, cfg->firewallBackend); + networkRemoveFirewallRules(obj); virNetworkObjUnrefMacMap(obj); @@ -2077,8 +2080,7 @@ networkStartNetworkVirtual(virNetworkDriverState *driver, static int -networkShutdownNetworkVirtual(virNetworkObj *obj, - virNetworkDriverConfig *cfg) +networkShutdownNetworkVirtual(virNetworkObj *obj) { virNetworkDef *def = virNetworkObjGetDef(obj); pid_t dnsmasqPid; @@ -2104,7 +2106,7 @@ networkShutdownNetworkVirtual(virNetworkObj *obj, ignore_value(virNetDevSetOnline(def->bridge, false)); if (def->forward.type != VIR_NETWORK_FORWARD_OPEN) - networkRemoveFirewallRules(def, cfg->firewallBackend); + networkRemoveFirewallRules(obj); ignore_value(virNetDevBridgeDelete(def->bridge)); @@ -2408,7 +2410,7 @@ networkShutdownNetwork(virNetworkDriverState *driver, case VIR_NETWORK_FORWARD_NAT: case VIR_NETWORK_FORWARD_ROUTE: case VIR_NETWORK_FORWARD_OPEN: - ret = networkShutdownNetworkVirtual(obj, cfg); + ret = networkShutdownNetworkVirtual(obj); break; case VIR_NETWORK_FORWARD_BRIDGE: @@ -3259,7 +3261,7 @@ networkUpdate(virNetworkPtr net, * old rules (and remember to load new ones after the * update). */ - networkRemoveFirewallRules(def, cfg->firewallBackend); + networkRemoveFirewallRules(obj); needFirewallRefresh = true; break; default: @@ -3286,16 +3288,21 @@ networkUpdate(virNetworkPtr net, if (virNetworkObjUpdate(obj, command, section, parentIndex, xml, network_driver->xmlopt, flags) < 0) { - if (needFirewallRefresh) - ignore_value(networkAddFirewallRules(def, cfg->firewallBackend)); + if (needFirewallRefresh) { + ignore_value(networkAddFirewallRules(def, cfg->firewallBackend, + virNetworkObjGetFwRemovalPtr(obj))); + } goto cleanup; } /* @def is replaced */ def = virNetworkObjGetDef(obj); - if (needFirewallRefresh && networkAddFirewallRules(def, cfg->firewallBackend) < 0) + if (needFirewallRefresh && + networkAddFirewallRules(def, cfg->firewallBackend, + virNetworkObjGetFwRemovalPtr(obj)) < 0) { goto cleanup; + } if (flags & VIR_NETWORK_UPDATE_AFFECT_CONFIG) { /* save updated persistent config to disk */ diff --git a/src/network/bridge_driver_linux.c b/src/network/bridge_driver_linux.c index 988362abef..b488600989 100644 --- a/src/network/bridge_driver_linux.c +++ b/src/network/bridge_driver_linux.c @@ -325,7 +325,8 @@ int networkCheckRouteCollision(virNetworkDef *def) int networkAddFirewallRules(virNetworkDef *def, - virFirewallBackend firewallBackend) + virFirewallBackend firewallBackend, + virFirewall **fwRemoval) { networkSetupPrivateChains(firewallBackend, false); @@ -411,13 +412,28 @@ networkAddFirewallRules(virNetworkDef *def, } } - return iptablesAddFirewallRules(def); + return iptablesAddFirewallRules(def, fwRemoval); } void -networkRemoveFirewallRules(virNetworkDef *def, - virFirewallBackend firewallBackend G_GNUC_UNUSED) +networkRemoveFirewallRules(virNetworkObj *obj) { - iptablesRemoveFirewallRules(def); + virFirewall *fw; + + if ((fw = virNetworkObjGetFwRemoval(obj)) == NULL) { + /* No information about firewall rules in the network status, + * so we assume the old iptables-based rules from 10.2.0 and + * earlier. + */ + VIR_DEBUG("No firewall info in network status, assuming old-style iptables"); + iptablesRemoveFirewallRules(virNetworkObjGetDef(obj)); + return; + } + + /* fwRemoval info was stored in the network status, so use that to + * remove the firewall + */ + VIR_DEBUG("Removing firewall rules with commands saved in network status"); + virFirewallApply(fw); } diff --git a/src/network/bridge_driver_nop.c b/src/network/bridge_driver_nop.c index 7d9a061e50..537b9234f8 100644 --- a/src/network/bridge_driver_nop.c +++ b/src/network/bridge_driver_nop.c @@ -37,12 +37,12 @@ int networkCheckRouteCollision(virNetworkDef *def G_GNUC_UNUSED) } int networkAddFirewallRules(virNetworkDef *def G_GNUC_UNUSED, - virFirewallBackend firewallBackend G_GNUC_UNUSED) + virFirewallBackend firewallBackend G_GNUC_UNUSED, + virFirewall **fwRemoval G_GNUC_UNUSED) { return 0; } -void networkRemoveFirewallRules(virNetworkDef *def G_GNUC_UNUSED, - virFirewallBackend firewallBackend G_GNUC_UNUSED) +void networkRemoveFirewallRules(virNetworkObj *obj G_GNUC_UNUSED) { } diff --git a/src/network/bridge_driver_platform.h b/src/network/bridge_driver_platform.h index 7443c3129f..cd2e3fa7b5 100644 --- a/src/network/bridge_driver_platform.h +++ b/src/network/bridge_driver_platform.h @@ -33,7 +33,7 @@ void networkPostReloadFirewallRules(bool startup); int networkCheckRouteCollision(virNetworkDef *def); int networkAddFirewallRules(virNetworkDef *def, - virFirewallBackend firewallBackend); + virFirewallBackend firewallBackend, + virFirewall **fwRemoval); -void networkRemoveFirewallRules(virNetworkDef *def, - virFirewallBackend firewallBackend); +void networkRemoveFirewallRules(virNetworkObj *obj); diff --git a/src/network/network_iptables.c b/src/network/network_iptables.c index 467d43c1e9..f774176b3d 100644 --- a/src/network/network_iptables.c +++ b/src/network/network_iptables.c @@ -1591,9 +1591,19 @@ iptablesRemoveIPSpecificFirewallRules(virFirewall *fw, } -/* Add all rules for all ip addresses (and general rules) on a network */ +/* iptablesAddFirewallrules: + * + * @def - the network that needs an iptables firewall added + * @fwRemoval - if this is not NULL, it points to a pointer + * that should be filled in with a virFirewall object containing + * all the commands needed to remove this firewall at a later time. + * + * Add all rules for all ip addresses (and general rules) on a + * network, and optionally return a virFirewall object containing all + * the rules needed to later remove the firewall that has been added. +*/ int -iptablesAddFirewallRules(virNetworkDef *def) +iptablesAddFirewallRules(virNetworkDef *def, virFirewall **fwRemoval) { size_t i; virNetworkIPDef *ipdef; @@ -1614,10 +1624,35 @@ iptablesAddFirewallRules(virNetworkDef *def) VIR_FIREWALL_TRANSACTION_AUTO_ROLLBACK)); iptablesAddChecksumFirewallRules(fw, def); - return virFirewallApply(fw); + if (virFirewallApply(fw) < 0) + return -1; + + if (fwRemoval) { + /* caller wants us to create a virFirewall object that can be + * applied to undo everything that was just done by * virFirewallApply() + */ + + if (virFirewallNewFromRollback(fw, fwRemoval) < 0) + return -1; + } + + return 0; } -/* Remove all rules for all ip addresses (and general rules) on a network */ +/* iptablesRemoveFirewallRules: + * + * @def - the network that needs its iptables firewall rules removed + * + * Remove all rules for all ip addresses (and general rules) on a + * network that is being shut down. + * + * This function assumes the set of iptables rules that were added by + * all versions of libvirt prior to 10.4.0; any libvirt of that + * release or newer may or may not have this same set of rules, and + * should be using the list of commands saved in NetworkObj::fwRemoval + * (<fwRemoval> element in the network status XML) to remove the + * network's firewall rules. + */ void iptablesRemoveFirewallRules(virNetworkDef *def) { diff --git a/src/network/network_iptables.h b/src/network/network_iptables.h index cdc143f154..d6ffc15bb0 100644 --- a/src/network/network_iptables.h +++ b/src/network/network_iptables.h @@ -23,7 +23,7 @@ #include "virfirewall.h" #include "network_conf.h" -int iptablesAddFirewallRules(virNetworkDef *def); +int iptablesAddFirewallRules(virNetworkDef *def, virFirewall **fwRemoval); void iptablesRemoveFirewallRules(virNetworkDef *def); diff --git a/tests/networkxml2firewalltest.c b/tests/networkxml2firewalltest.c index 3a9f409e2a..082979e5dc 100644 --- a/tests/networkxml2firewalltest.c +++ b/tests/networkxml2firewalltest.c @@ -98,7 +98,7 @@ static int testCompareXMLToArgvFiles(const char *xml, if (!(def = virNetworkDefParse(NULL, xml, NULL, false))) return -1; - if (networkAddFirewallRules(def, VIR_FIREWALL_BACKEND_IPTABLES) < 0) + if (networkAddFirewallRules(def, VIR_FIREWALL_BACKEND_IPTABLES, NULL) < 0) return -1; actual = actualargv = virBufferContentAndReset(&buf); -- 2.44.0
In the case that a new version of libvirt is started that uses different rules to build the network firewall, we need to re-save the status so that when the network is destroyed (or the *next* time libvirt is restarted and wants to remove/re-add the firewall), it will have the proper information to perform the firewall removal. Signed-off-by: Laine Stump <laine@redhat.com> --- src/conf/virnetworkobj.c | 1 + src/network/bridge_driver.c | 8 +++++++- 2 files changed, 8 insertions(+), 1 deletion(-) diff --git a/src/conf/virnetworkobj.c b/src/conf/virnetworkobj.c index fef4c69004..228d0a6585 100644 --- a/src/conf/virnetworkobj.c +++ b/src/conf/virnetworkobj.c @@ -840,6 +840,7 @@ virNetworkObjSaveStatus(const char *statusDir, int flags = 0; g_autofree char *xml = NULL; + VIR_DEBUG("Writing network status to disk"); if (!(xml = virNetworkObjFormat(obj, xmlopt, flags))) return -1; diff --git a/src/network/bridge_driver.c b/src/network/bridge_driver.c index c54a595d4d..c1dddd0550 100644 --- a/src/network/bridge_driver.c +++ b/src/network/bridge_driver.c @@ -1685,6 +1685,7 @@ networkReloadFirewallRulesHelper(virNetworkObj *obj, g_autoptr(virNetworkDriverConfig) cfg = virNetworkDriverGetConfig(networkGetDriver()); VIR_LOCK_GUARD lock = virObjectLockGuard(obj); virNetworkDef *def = virNetworkObjGetDef(obj); + bool saveStatus = false; if (virNetworkObjIsActive(obj)) { switch ((virNetworkForwardType) def->forward.type) { @@ -1699,6 +1700,7 @@ networkReloadFirewallRulesHelper(virNetworkObj *obj, networkRemoveFirewallRules(obj); ignore_value(networkAddFirewallRules(def, cfg->firewallBackend, virNetworkObjGetFwRemovalPtr(obj))); + saveStatus = true; break; case VIR_NETWORK_FORWARD_OPEN: @@ -1716,6 +1718,11 @@ networkReloadFirewallRulesHelper(virNetworkObj *obj, } } + if (saveStatus) { + ignore_value(virNetworkObjSaveStatus(cfg->stateDir, obj, + network_driver->xmlopt)); + } + return 0; } @@ -2362,7 +2369,6 @@ networkStartNetwork(virNetworkDriverState *driver, /* Persist the live configuration now that anything autogenerated * is setup. */ - VIR_DEBUG("Writing network status to disk"); if (virNetworkObjSaveStatus(cfg->stateDir, obj, network_driver->xmlopt) < 0) goto cleanup; -- 2.44.0
This was the only reason we required the iptables and ebtables packages at build time, and many other external commands already have their binaries found at runtime by looking through $PATH (virCommand automatically does this), so we may as well do it for these commands as well. Since we no longer need iptables or iptables at build time, we can also drop the BuildRequires for them from the rpm specfile. Inspired-by: 6aa2fa38b04b802f137e51ebbeb4ca9b67487575 Signed-off-by: Laine Stump <laine@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> --- Change from V2: * This was 2 patches in V2 (22 & 23), combined here. libvirt.spec.in | 2 -- meson.build | 3 --- src/network/bridge_driver_conf.c | 2 ++ src/util/virfirewall.h | 5 +++++ 4 files changed, 7 insertions(+), 5 deletions(-) diff --git a/libvirt.spec.in b/libvirt.spec.in index bde25c6f6e..05f7a7e7c0 100644 --- a/libvirt.spec.in +++ b/libvirt.spec.in @@ -356,8 +356,6 @@ BuildRequires: sanlock-devel >= 2.4 BuildRequires: libpcap-devel >= 1.5.0 BuildRequires: libnl3-devel BuildRequires: libselinux-devel -BuildRequires: iptables -BuildRequires: ebtables # For modprobe BuildRequires: kmod BuildRequires: cyrus-sasl-devel diff --git a/meson.build b/meson.build index 02340c09dd..b9379d6ce7 100644 --- a/meson.build +++ b/meson.build @@ -818,10 +818,7 @@ optional_test_programs = [ optional_programs = [ 'dmidecode', - 'ebtables', 'ip', - 'ip6tables', - 'iptables', 'iscsiadm', 'mdevctl', 'mm-ctl', diff --git a/src/network/bridge_driver_conf.c b/src/network/bridge_driver_conf.c index 25cbbf8933..e8acb70554 100644 --- a/src/network/bridge_driver_conf.c +++ b/src/network/bridge_driver_conf.c @@ -27,8 +27,10 @@ #include "virerror.h" #include "virfile.h" #include "virutil.h" +#include "virfirewall.h" /* for binary names */ #include "bridge_driver_conf.h" + #define VIR_FROM_THIS VIR_FROM_NETWORK VIR_LOG_INIT("network.bridge_driver"); diff --git a/src/util/virfirewall.h b/src/util/virfirewall.h index 917745c315..4ac16f02b3 100644 --- a/src/util/virfirewall.h +++ b/src/util/virfirewall.h @@ -25,6 +25,11 @@ #include "virbuffer.h" #include "virxml.h" +/* various external programs executed when applying firewalls */ +#define EBTABLES "ebtables" +#define IPTABLES "iptables" +#define IP6TABLES "ip6tables" + typedef struct _virFirewall virFirewall; typedef struct _virFirewallCmd virFirewallCmd; -- 2.44.0
Support using nftables to setup the firewall for each virtual network, rather than iptables. The initial implementation of the nftables backend creates (almost) exactly the same ruleset as the iptables backend, determined by running the following commands on a host that has an active virtual network: iptables-save >iptables.txt iptables-restore-translate -f iptables.txt (and the similar ip6tables-save/ip6tables-restore-translate for an IPv6 network). Correctness of the new backend was checked by comparing the output of: nft list ruleset when the backend is set to iptables and when it is set to nftables. This page was used as a guide: https://wiki.nftables.org/wiki-nftables/index.php/Moving_from_iptables_to_nf... The only differences between the rules created by the nftables backed vs. the iptables backend (aside from a few inconsequential changes in display order of some chains/options) are: 1) When we add nftables rules, rather than adding them in the system-created "filter" and "nat" tables, we add them in a private table (ie only we should be using it) created by us called "libvirt" (the system-created "filter" and "nat" tables can't be used because adding any rules to those tables directly with nft will cause failure of any legacy application attempting to use iptables when it tries to list the iptables rules (e.g. "iptables -S"). (NB: in nftables only a single table is required for both nat and filter rules - the chains for each are differentiated by specifying different "hook" locations for the toplevel chain of each) 2) nftables doesn't support the "checksum mangle" rule (or any equivalent functionality) that we have historically added to our iptables rules, so the nftables rules we add have nothing related to checksum mangling. (NB: The result of (2) is that if you a) have a very old guest (RHEL5 era or earlier) and b) that guest is using a virtio-net network device, and c) the virtio-net device is using vhost packet processing (the default) then DHCP on the guest will fail. You can work around this by adding <driver name='qemu'/> to the <interface> XML for the guest). There are certainly much better nftables rulesets that could be used instead of those implemented here, and everything is in place to make future changes to the rules that are used simple and free of surprises (e.g. the rules that are added have coresponding "removal" commands added to the network status so that we will always remove exactly the rules that were previously added rather than trying to remove the rules that "this build of libvirt would have added" (which will be incorrect the first time we run a libvirt with a newly modified ruleset). For this initial implementation though, I wanted the nftables rules to be as identical to the iptables rules as possible, just to make it easier to verify that everything is working. The backend can be manually chosen using the firewall_backend setting in /etc/libvirt/network.conf. libvirtd/virtnetworkd will read this setting when it starts; if there is no explicit setting, it will look for iptables commands on the host and, if they are found, will select the iptables backend (this is the default for the sake of 100% backward compatibility), but if iptables commands aren't found, then it will use the nftables backend. (Since libvirt will automatically remove all its previous filter rules and re-add rules using the current backend setting for all active networks when it starts up, and the only noticeable change in behavior between the iptables and nftables backends is that noted in item (2) above, we could instead decide to make nftables the default backend rather than iptables - it all depends on how important it is to work properly on 15 year old guest OSes using DHCP with virtio-net interfaces). Signed-off-by: Laine Stump <laine@redhat.com> --- Change from V2: * small diffs related to making failure to detect any firewall backend fatal * change VIR_NFTABLES_ARG_IS_INSERT to VIR_NFTABLES_ARG_IS_CREATE meson.build | 2 + po/POTFILES | 1 + src/network/bridge_driver_conf.c | 12 + src/network/bridge_driver_linux.c | 17 +- src/network/meson.build | 1 + src/network/network.conf.in | 21 +- src/network/network_nftables.c | 940 ++++++++++++++++++++++++++++++ src/network/network_nftables.h | 28 + src/util/virfirewall.c | 167 +++++- src/util/virfirewall.h | 2 + 10 files changed, 1186 insertions(+), 5 deletions(-) create mode 100644 src/network/network_nftables.c create mode 100644 src/network/network_nftables.h diff --git a/meson.build b/meson.build index b9379d6ce7..4e125048b3 100644 --- a/meson.build +++ b/meson.build @@ -1619,6 +1619,8 @@ if not get_option('driver_network').disabled() and conf.has('WITH_LIBVIRTD') conf.set_quoted('FIREWALL_BACKEND', firewall_backend) if firewall_backend == 'iptables' conf.set('FIREWALL_BACKEND_DEFAULT_IPTABLES', 1) + elif firewall_backend == 'nftables' + conf.set('FIREWALL_BACKEND_DEFAULT_NFTABLES', 1) endif elif get_option('driver_network').enabled() error('libvirtd must be enabled to build the network driver') diff --git a/po/POTFILES b/po/POTFILES index 8b89fcf832..118c9a98c8 100644 --- a/po/POTFILES +++ b/po/POTFILES @@ -145,6 +145,7 @@ src/network/bridge_driver_conf.c src/network/bridge_driver_linux.c src/network/leaseshelper.c src/network/network_iptables.c +src/network/network_nftables.c src/node_device/node_device_driver.c src/node_device/node_device_udev.c src/nwfilter/nwfilter_dhcpsnoop.c diff --git a/src/network/bridge_driver_conf.c b/src/network/bridge_driver_conf.c index e8acb70554..26f05f371e 100644 --- a/src/network/bridge_driver_conf.c +++ b/src/network/bridge_driver_conf.c @@ -100,6 +100,7 @@ virNetworkLoadDriverConfig(virNetworkDriverConfig *cfg G_GNUC_UNUSED, * for binaries used by the backends, and set accordingly. */ g_autofree char *iptablesInPath = NULL; + g_autofree char *nftInPath = NULL; bool binaryFound = false; /* virFindFileInPath() uses g_find_program_in_path(), @@ -110,6 +111,17 @@ virNetworkLoadDriverConfig(virNetworkDriverConfig *cfg G_GNUC_UNUSED, if ((iptablesInPath = virFindFileInPath(IPTABLES))) { cfg->firewallBackend = VIR_FIREWALL_BACKEND_IPTABLES; binaryFound = true; + } else if ((nftInPath = virFindFileInPath(NFT))) { + cfg->firewallBackend = VIR_FIREWALL_BACKEND_NFTABLES; + binaryFound = true; + } +#elif defined(FIREWALL_BACKEND_DEFAULT_IPTABLES) + if ((nftInPath = virFindFileInPath(NFT))) { + cfg->firewallBackend = VIR_FIREWALL_BACKEND_NFTABLES; + binaryFound = true; + } else if ((iptablesInPath = virFindFileInPath(IPTABLES))) { + cfg->firewallBackend = VIR_FIREWALL_BACKEND_IPTABLES; + binaryFound = true; } #else # error "No usable firewall_backend was set in build options" diff --git a/src/network/bridge_driver_linux.c b/src/network/bridge_driver_linux.c index b488600989..35e6bd1154 100644 --- a/src/network/bridge_driver_linux.c +++ b/src/network/bridge_driver_linux.c @@ -27,6 +27,7 @@ #include "virfirewall.h" #include "virfirewalld.h" #include "network_iptables.h" +#include "network_nftables.h" #define VIR_FROM_THIS VIR_FROM_NONE @@ -49,6 +50,9 @@ networkFirewallSetupPrivateChains(virFirewallBackend backend, case VIR_FIREWALL_BACKEND_IPTABLES: return iptablesSetupPrivateChains(layer); + case VIR_FIREWALL_BACKEND_NFTABLES: + return nftablesSetupPrivateChains(layer); + case VIR_FIREWALL_BACKEND_LAST: virReportEnumRangeError(virFirewallBackend, backend); return -1; @@ -412,7 +416,18 @@ networkAddFirewallRules(virNetworkDef *def, } } - return iptablesAddFirewallRules(def, fwRemoval); + switch (firewallBackend) { + case VIR_FIREWALL_BACKEND_IPTABLES: + return iptablesAddFirewallRules(def, fwRemoval); + + case VIR_FIREWALL_BACKEND_NFTABLES: + return nftablesAddFirewallRules(def, fwRemoval); + + case VIR_FIREWALL_BACKEND_LAST: + virReportEnumRangeError(virFirewallBackend, firewallBackend); + return -1; + } + return 0; } diff --git a/src/network/meson.build b/src/network/meson.build index c79a36da22..ad08f1fe51 100644 --- a/src/network/meson.build +++ b/src/network/meson.build @@ -3,6 +3,7 @@ network_driver_sources = [ 'bridge_driver_conf.c', 'bridge_driver_platform.c', 'network_iptables.c', + 'network_nftables.c', ] driver_source_files += files(network_driver_sources) diff --git a/src/network/network.conf.in b/src/network/network.conf.in index ec75e125d8..f579f39fcd 100644 --- a/src/network/network.conf.in +++ b/src/network/network.conf.in @@ -5,7 +5,24 @@ # firewall_backend: # # determines which subsystem to use to setup firewall packet -# filtering rules for virtual networks. Currently the only supported -# selection is "iptables". +# filtering rules for virtual networks. +# +# Supported settings: +# +# iptables - use iptables commands to construct the firewall +# nftables - use nft commands to construct the firewall +# +# If firewall_backend isn't set in this file, libvirt will +# prefer the @FIREWALL_BACKEND@ backend *if the necessary package. +# binary is installed*, otherwise it will look for the package/binary +# needed for the other backend and use that if available. If neither +# is available on the host, then the network driver will fail to +# start, and an error will be logged. +# +# (NB: switching from one backend to another while there are active +# virtual networks *is* supported. The change will take place the +# next time that libvirtd/virtnetworkd is restarted - all existing +# virtual networks will have their old firewalls removed, and then +# reloaded using the new backend.) # #firewall_backend = "@FIREWALL_BACKEND@" diff --git a/src/network/network_nftables.c b/src/network/network_nftables.c new file mode 100644 index 0000000000..c8cee98df5 --- /dev/null +++ b/src/network/network_nftables.c @@ -0,0 +1,940 @@ +/* + * network_nftables.c: nftables-based firewall implementation for + * virtual networks. + * + * Copyright (C) 2007-2014 Red Hat, Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library. If not, see + * <http://www.gnu.org/licenses/>. + */ + +#include <config.h> + +#include <stdarg.h> +#include <unistd.h> +#include <fcntl.h> +#include <sys/types.h> +#include <sys/stat.h> + +#include "internal.h" +#include "virfirewalld.h" +#include "virerror.h" +#include "virlog.h" +#include "virhash.h" +#include "virenum.h" +#include "virstring.h" +#include "network_nftables.h" + +VIR_LOG_INIT("network.nftables"); + +#define VIR_FROM_THIS VIR_FROM_NONE + +#define VIR_NFTABLES_INPUT_CHAIN "LIBVIRT_INP" +#define VIR_NFTABLES_OUTPUT_CHAIN "LIBVIRT_OUT" +#define VIR_NFTABLES_FWD_IN_CHAIN "LIBVIRT_FWI" +#define VIR_NFTABLES_FWD_OUT_CHAIN "LIBVIRT_FWO" +#define VIR_NFTABLES_FWD_X_CHAIN "LIBVIRT_FWX" +#define VIR_NFTABLES_NAT_POSTROUTE_CHAIN "LIBVIRT_PRT" + +/* we must avoid using the standard "filter" table as used by + * iptables, as any subsequent attempts to use iptables commands will + * fail (due to the "filter" table having rules that are unexpected by + * the iptables-compat + */ + +#define VIR_NFTABLES_PRIVATE_TABLE "libvirt" + +/* nftables backend uses the same binary (nft) for all layers, but + * IPv4 and IPv6 have their rules in separate classes of tables, + * either "ip" or "ip6". (there is also an "inet" class of tables that + * would examined for both IPv4 and IPv6 traffic, but since we want + * different rules for each family, we only use the family-specific + * table classes). + */ +VIR_ENUM_DECL(nftablesLayer); +VIR_ENUM_IMPL(nftablesLayer, + VIR_FIREWALL_LAYER_LAST, + "", + "ip", + "ip6", +); + + +typedef struct { + const char *parent; + const char *child; + const char *extraArgs; +} nftablesGlobalChain; + +typedef struct { + virFirewallLayer layer; + nftablesGlobalChain *chains; + size_t nchains; + bool *changed; +} nftablesGlobalChainData; + + +nftablesGlobalChain nftablesChains[] = { + /* chains for filter rules */ + {NULL, "INPUT", "{ type filter hook input priority 0; policy accept; }"}, + {NULL, "FORWARD", "{ type filter hook forward priority 0; policy accept; }"}, + {NULL, "OUTPUT", "{ type filter hook output priority 0; policy accept; }"}, + {"INPUT", VIR_NFTABLES_INPUT_CHAIN, NULL}, + {"OUTPUT", VIR_NFTABLES_OUTPUT_CHAIN, NULL}, + {"FORWARD", VIR_NFTABLES_FWD_OUT_CHAIN, NULL}, + {"FORWARD", VIR_NFTABLES_FWD_IN_CHAIN, NULL}, + {"FORWARD", VIR_NFTABLES_FWD_X_CHAIN, NULL}, + + /* chains for NAT rules */ + {NULL, "POSTROUTING", "{ type nat hook postrouting priority 100; policy accept; }"}, + {"POSTROUTING", VIR_NFTABLES_NAT_POSTROUTE_CHAIN, NULL}, +}; + + +static int +nftablesPrivateChainCreate(virFirewall *fw, + virFirewallLayer layer, + const char *const *lines, + void *opaque) +{ + nftablesGlobalChainData *data = opaque; + g_autoptr(GHashTable) chains = virHashNew(NULL); + g_autoptr(GHashTable) links = virHashNew(NULL); + const char *const *line; + const char *chain = NULL; + size_t i; + bool tableMatch = false; + const char *layerStr = nftablesLayerTypeToString(layer); + g_autofree char *tableStr = g_strdup_printf("table %s %s {", + layerStr, + VIR_NFTABLES_PRIVATE_TABLE); + + line = lines; + while (line && *line) { + const char *pos = *line; + + virSkipSpaces(&pos); + if (STREQ(pos, tableStr)) { + /* "table ip libvirt {" */ + + tableMatch = true; + + } else if (STRPREFIX(pos, "chain ")) { + /* "chain LIBVIRT_OUT {" */ + + chain = pos + 6; + pos = strchr(chain, ' '); + if (pos) { + *(char *)pos = '\0'; + if (virHashUpdateEntry(chains, chain, (void *)0x1) < 0) + return -1; + } + + } else if ((pos = strstr(pos, "jump "))) { + /* "counter packets 20189046 bytes 3473108889 jump LIBVIRT_OUT" */ + + pos += 5; + if (chain) { + if (virHashUpdateEntry(links, pos, (char *)chain) < 0) + return -1; + } + + } + line++; + } + + if (!tableMatch) { + virFirewallAddCmd(fw, layer, "add", "table", + layerStr, VIR_NFTABLES_PRIVATE_TABLE, NULL); + } + + for (i = 0; i < data->nchains; i++) { + if (!(tableMatch && virHashLookup(chains, data->chains[i].child))) { + virFirewallAddCmd(fw, layer, "add", "chain", + layerStr, VIR_NFTABLES_PRIVATE_TABLE, + data->chains[i].child, + data->chains[i].extraArgs, NULL); + *data->changed = true; + } + + if (data->chains[i].parent) { + const char *from = virHashLookup(links, data->chains[i].child); + + if (!from || STRNEQ(from, data->chains[i].parent)) { + virFirewallAddCmd(fw, layer, "insert", "rule", + layerStr, VIR_NFTABLES_PRIVATE_TABLE, + data->chains[i].parent, "counter", + "jump", data->chains[i].child, NULL); + } + } + } + + return 0; +} + + +int +nftablesSetupPrivateChains(virFirewallLayer layer) +{ + bool changed = false; + g_autoptr(virFirewall) fw = virFirewallNew(VIR_FIREWALL_BACKEND_NFTABLES); + const char *layerStr = nftablesLayerTypeToString(layer); + nftablesGlobalChainData data = { layer, nftablesChains, G_N_ELEMENTS(nftablesChains), &changed }; + + virFirewallStartTransaction(fw, 0); + + /* the output of "nft list table ip[6] libvirt" will be parsed by + * the callback nftablesPrivateChainCreate which will add any + * needed commands to add missing chains (or possibly even add the + * "ip[6] libvirt" table itself + */ + virFirewallAddCmdFull(fw, layer, false, + nftablesPrivateChainCreate, &data, + "list", "table", + layerStr, VIR_NFTABLES_PRIVATE_TABLE, NULL); + + if (virFirewallApply(fw) < 0) + return -1; + + return changed ? 1 : 0; +} + + +static void +nftablesAddInput(virFirewall *fw, + virFirewallLayer layer, + const char *iface, + int port, + int tcp) +{ + g_autofree char *portstr = g_strdup_printf("%d", port); + const char *layerStr = nftablesLayerTypeToString(layer); + + virFirewallAddCmd(fw, layer, "insert", "rule", + layerStr, VIR_NFTABLES_PRIVATE_TABLE, + VIR_NFTABLES_INPUT_CHAIN, + "iifname", iface, + tcp ? "tcp" : "udp", + "dport", portstr, + "counter", "accept", + NULL); +} + + +static void +nftablesAddOutput(virFirewall *fw, + virFirewallLayer layer, + const char *iface, + int port, + int tcp) +{ + g_autofree char *portstr = g_strdup_printf("%d", port); + const char *layerStr = nftablesLayerTypeToString(layer); + + virFirewallAddCmd(fw, layer, "insert", "rule", + layerStr, VIR_NFTABLES_PRIVATE_TABLE, + VIR_NFTABLES_OUTPUT_CHAIN, + "oifname", iface, + tcp ? "tcp" : "udp", + "dport", portstr, + "counter", "accept", + NULL); +} + + +/** + * nftablesAddTcpInput: + * + * Add a rule to @fw that will allow incoming TCP sessions to port + * @port on @iface with protocol @layer. + */ +static void +nftablesAddTcpInput(virFirewall *fw, + virFirewallLayer layer, + const char *iface, + int port) +{ + nftablesAddInput(fw, layer, iface, port, 1); +} + + +/** + * nftablesAddUdpInput: + * + * Add a rule to @fw that will allow incoming UDP sessions to port + * @port on @iface with protocol @layer. + */ +static void +nftablesAddUdpInput(virFirewall *fw, + virFirewallLayer layer, + const char *iface, + int port) +{ + nftablesAddInput(fw, layer, iface, port, 0); +} + + +/** + * nftablesAddTcpOutput: + * + * Add a rule to @fw that will allow outbound TCP sessions to port + * @port on @iface with protocol @layer. + */ +static void +nftablesAddTcpOutput(virFirewall *fw, + virFirewallLayer layer, + const char *iface, + int port) +{ + nftablesAddOutput(fw, layer, iface, port, 1); +} + + +/** + * nftablesAddUdpOutput: + * + * Add a rule to @fw that will allow outbound UDP sessions to port + * @port on @iface with protocol @layer. + */ +static void +nftablesAddUdpOutput(virFirewall *fw, + virFirewallLayer layer, + const char *iface, + int port) +{ + nftablesAddOutput(fw, layer, iface, port, 0); +} + + +/** + * nftablesAddForwardAllowOut: + * + * Add a rule to @fw that allows all outbound traffic coming from + * @iface (the virtual network's bridge) to be forwarded out @physdev, + * as long as its source address is in @netaddr/@prefix. + */ +static int +nftablesAddForwardAllowOut(virFirewall *fw, + virSocketAddr *netaddr, + unsigned int prefix, + const char *iface, + const char *physdev) +{ + g_autofree char *networkstr = NULL; + virFirewallLayer layer = VIR_SOCKET_ADDR_FAMILY(netaddr) == AF_INET ? + VIR_FIREWALL_LAYER_IPV4 : VIR_FIREWALL_LAYER_IPV6; + const char *layerStr = nftablesLayerTypeToString(layer); + virFirewallCmd *fwCmd; + + if (!(networkstr = virSocketAddrFormatWithPrefix(netaddr, prefix, true))) + return -1; + + fwCmd = virFirewallAddCmd(fw, layer, "insert", "rule", + layerStr, VIR_NFTABLES_PRIVATE_TABLE, + VIR_NFTABLES_FWD_OUT_CHAIN, + layerStr, "saddr", networkstr, + "iifname", iface, NULL); + + if (physdev && physdev[0]) + virFirewallCmdAddArgList(fw, fwCmd, "oifname", physdev, NULL); + + virFirewallCmdAddArgList(fw, fwCmd, "counter", "accept", NULL); + + return 0; +} + +/** + * nftablesAddForwardAllowRelatedIn: + * + * Add a rule to @fw that allows all traffic coming in from @physdev + * and destined to @iface (the virtual network's bridge) that has a + * destination within @netaddr/@prefix and is associated with an + * existing connection. + */ +static int +nftablesAddForwardAllowRelatedIn(virFirewall *fw, + virSocketAddr *netaddr, + unsigned int prefix, + const char *iface, + const char *physdev) +{ + virFirewallLayer layer = VIR_SOCKET_ADDR_FAMILY(netaddr) == AF_INET ? + VIR_FIREWALL_LAYER_IPV4 : VIR_FIREWALL_LAYER_IPV6; + const char *layerStr = nftablesLayerTypeToString(layer); + g_autofree char *networkstr = NULL; + virFirewallCmd *fwCmd; + + if (!(networkstr = virSocketAddrFormatWithPrefix(netaddr, prefix, true))) + return -1; + + fwCmd = virFirewallAddCmd(fw, layer, "insert", "rule", + layerStr, VIR_NFTABLES_PRIVATE_TABLE, + VIR_NFTABLES_FWD_IN_CHAIN, NULL); + + if (physdev && physdev[0]) + virFirewallCmdAddArgList(fw, fwCmd, "iifname", physdev, NULL); + + virFirewallCmdAddArgList(fw, fwCmd, "oifname", iface, + layerStr, "daddr", networkstr, + "ct", "state", "related,established", + "counter", "accept", NULL); + return 0; +} + + +/** + * nftablesAddForwardAllowIn: + * + * Add a rule to @fw that allows all traffic coming in from @physdev + * and destined to @iface (the virtual network's bridge) that has a + * destination within @netaddr/@prefix. + */ +static int +nftablesAddForwardAllowIn(virFirewall *fw, + virSocketAddr *netaddr, + unsigned int prefix, + const char *iface, + const char *physdev) +{ + virFirewallLayer layer = VIR_SOCKET_ADDR_FAMILY(netaddr) == AF_INET ? + VIR_FIREWALL_LAYER_IPV4 : VIR_FIREWALL_LAYER_IPV6; + const char *layerStr = nftablesLayerTypeToString(layer); + g_autofree char *networkstr = NULL; + virFirewallCmd *fwCmd; + + if (!(networkstr = virSocketAddrFormatWithPrefix(netaddr, prefix, true))) + return -1; + + fwCmd = virFirewallAddCmd(fw, layer, "insert", "rule", + layerStr, VIR_NFTABLES_PRIVATE_TABLE, + VIR_NFTABLES_FWD_IN_CHAIN, + layerStr, "daddr", networkstr, NULL); + + if (physdev && physdev[0]) + virFirewallCmdAddArgList(fw, fwCmd, "iifname", physdev, NULL); + + virFirewallCmdAddArgList(fw, fwCmd, "oifname", iface, + "counter", "accept", NULL); + return 0; +} + + +/** + * nftablesAddForwardAllowCross: + * + * Add a rule to @fw to allow traffic to go across @iface (the virtual + * network's bridge) from one port to another. This allows all traffic + * between guests on the same virtual network. + */ +static void +nftablesAddForwardAllowCross(virFirewall *fw, + virFirewallLayer layer, + const char *iface) +{ + virFirewallAddCmd(fw, layer, "insert", "rule", + nftablesLayerTypeToString(layer), + VIR_NFTABLES_PRIVATE_TABLE, + VIR_NFTABLES_FWD_X_CHAIN, + "iifname", iface, + "oifname", iface, + "counter", "accept", + NULL); +} + + +/** + * nftablesAddForwardRejectOut: + * + * Add a rule to @fw to forbid all outbound traffic through @iface + * (the virtual network's bridge). This is used as a catchall rule to + * reject traffic that hasn't already been explicitly allowed by + * another rule. + */ +static void +nftablesAddForwardRejectOut(virFirewall *fw, + virFirewallLayer layer, + const char *iface) +{ + virFirewallAddCmd(fw, layer, "insert", "rule", + nftablesLayerTypeToString(layer), + VIR_NFTABLES_PRIVATE_TABLE, + VIR_NFTABLES_FWD_OUT_CHAIN, + "iifname", iface, + "counter", "reject", + NULL); +} + + +/** + * nftablesAddForwardRejectIn: + * + * Add a rule to @fw to forbid all inbound traffic through @iface (the + * virtual network's bridge). This is used as a catchall rule to + * reject traffic that hasn't already been explicitly allowed by + * another rule. + */ +static void +nftablesAddForwardRejectIn(virFirewall *fw, + virFirewallLayer layer, + const char *iface) +{ + virFirewallAddCmd(fw, layer, "insert", "rule", + nftablesLayerTypeToString(layer), + VIR_NFTABLES_PRIVATE_TABLE, + VIR_NFTABLES_FWD_IN_CHAIN, + "oifname", iface, + "counter", "reject", + NULL); +} + + +/** + * nftablesAddForwardMasquerade: + * + * Add a rule to @fw that will masquerade outbound traffic from + * @netaddr/@prefix @iface to have the source IP/port from one of the + * range of @addr:@port (or something appropriate for the interface + * used for egress, if no address/port range is given) + */ +static int +nftablesAddForwardMasquerade(virFirewall *fw, + virSocketAddr *netaddr, + unsigned int prefix, + const char *physdev, + virSocketAddrRange *addr, + virPortRange *port, + const char *protocol) +{ + g_autofree char *networkstr = NULL; + g_autofree char *addrStartStr = NULL; + g_autofree char *addrEndStr = NULL; + g_autofree char *portRangeStr = NULL; + g_autofree char *natRangeStr = NULL; + virFirewallCmd *fwCmd; + int af = VIR_SOCKET_ADDR_FAMILY(netaddr); + virFirewallLayer layer = af == AF_INET ? + VIR_FIREWALL_LAYER_IPV4 : VIR_FIREWALL_LAYER_IPV6; + const char *layerStr = nftablesLayerTypeToString(layer); + + if (!(networkstr = virSocketAddrFormatWithPrefix(netaddr, prefix, true))) + return -1; + + if (VIR_SOCKET_ADDR_IS_FAMILY(&addr->start, af)) { + if (!(addrStartStr = virSocketAddrFormat(&addr->start))) + return -1; + if (VIR_SOCKET_ADDR_IS_FAMILY(&addr->end, af)) { + if (!(addrEndStr = virSocketAddrFormat(&addr->end))) + return -1; + } + } + + fwCmd = virFirewallAddCmd(fw, layer, "insert", "rule", + layerStr, VIR_NFTABLES_PRIVATE_TABLE, + VIR_NFTABLES_NAT_POSTROUTE_CHAIN, NULL); + + if (protocol && protocol[0]) + virFirewallCmdAddArgList(fw, fwCmd, "meta", "l4proto", protocol, NULL); + + virFirewallCmdAddArgList(fw, fwCmd, + layerStr, "saddr", networkstr, + layerStr, "daddr", "!=", networkstr, NULL); + + if (physdev && physdev[0]) + virFirewallCmdAddArgList(fw, fwCmd, "oifname", physdev, NULL); + + if (protocol && protocol[0]) { + if (port->start == 0 && port->end == 0) { + port->start = 1024; + port->end = 65535; + } + + if (port->start < port->end && port->end < 65536) { + portRangeStr = g_strdup_printf(":%u-%u", port->start, port->end); + } else { + virReportError(VIR_ERR_INTERNAL_ERROR, + _("Invalid port range '%1$u-%2$u'."), + port->start, port->end); + return -1; + } + } + + /* Use snat if public address is specified */ + if (addrStartStr && addrStartStr[0]) { + if (addrEndStr && addrEndStr[0]) { + natRangeStr = g_strdup_printf("%s-%s%s", addrStartStr, addrEndStr, + portRangeStr ? portRangeStr : ""); + } else { + natRangeStr = g_strdup_printf("%s%s", addrStartStr, + portRangeStr ? portRangeStr : ""); + } + + virFirewallCmdAddArgList(fw, fwCmd, "counter", "snat", "to", natRangeStr, NULL); + } else { + virFirewallCmdAddArgList(fw, fwCmd, "counter", "masquerade", NULL); + + if (portRangeStr && portRangeStr[0]) + virFirewallCmdAddArgList(fw, fwCmd, "to", portRangeStr, NULL); + } + + return 0; +} + + +/** + * nftablesAddDontMasquerade: + * + * Add a rule to @fw that prevents masquerading traffic coming from + * the network associated with the bridge if said traffic targets + * @destaddr. + */ +static int +nftablesAddDontMasquerade(virFirewall *fw, + virSocketAddr *netaddr, + unsigned int prefix, + const char *physdev, + const char *destaddr) +{ + g_autofree char *networkstr = NULL; + virFirewallLayer layer = VIR_SOCKET_ADDR_FAMILY(netaddr) == AF_INET ? + VIR_FIREWALL_LAYER_IPV4 : VIR_FIREWALL_LAYER_IPV6; + const char *layerStr = nftablesLayerTypeToString(layer); + virFirewallCmd *fwCmd; + + if (!(networkstr = virSocketAddrFormatWithPrefix(netaddr, prefix, true))) + return -1; + + fwCmd = virFirewallAddCmd(fw, layer, "insert", "rule", + layerStr, VIR_NFTABLES_PRIVATE_TABLE, + VIR_NFTABLES_NAT_POSTROUTE_CHAIN, NULL); + + if (physdev && physdev[0]) + virFirewallCmdAddArgList(fw, fwCmd, "oifname", physdev, NULL); + + virFirewallCmdAddArgList(fw, fwCmd, + layerStr, "saddr", networkstr, + layerStr, "daddr", destaddr, + "counter", "return", NULL); + return 0; +} + + +static const char networkLocalMulticastIPv4[] = "224.0.0.0/24"; +static const char networkLocalMulticastIPv6[] = "ff02::/16"; +static const char networkLocalBroadcast[] = "255.255.255.255/32"; + + +static int +nftablesAddMasqueradingFirewallRules(virFirewall *fw, + virNetworkDef *def, + virNetworkIPDef *ipdef) +{ + int prefix = virNetworkIPDefPrefix(ipdef); + const char *forwardIf = virNetworkDefForwardIf(def, 0); + bool isIPv4 = VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET); + + if (prefix < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, + _("Invalid prefix or netmask for '%1$s'"), + def->bridge); + return -1; + } + + /* allow forwarding packets from the bridge interface */ + if (nftablesAddForwardAllowOut(fw, + &ipdef->address, + prefix, + def->bridge, + forwardIf) < 0) + return -1; + + /* allow forwarding packets to the bridge interface if they are + * part of an existing connection + */ + if (nftablesAddForwardAllowRelatedIn(fw, + &ipdef->address, + prefix, + def->bridge, + forwardIf) < 0) + return -1; + + /* + * Enable masquerading. + * + * We need to end up with 5 rules in the table in this order + * + * 1. do not masquerade packets targeting 224.0.0.0/24 + * 2. do not masquerade packets targeting 255.255.255.255/32 + * 3. masquerade protocol=tcp with sport mapping restriction + * 4. masquerade protocol=udp with sport mapping restriction + * 5. generic, masquerade any protocol + * + * 224.0.0.0/24 is the local network multicast range. Packets are not + * forwarded outside. + * + * 255.255.255.255/32 is the broadcast address of any local network. Again, + * such packets are never forwarded, but strict DHCP clients don't accept + * DHCP replies with changed source ports. + * + * The sport mappings are required, because default Nftables + * MASQUERADE maintain port numbers unchanged where possible. + * + * NFS can be configured to only "trust" port numbers < 1023. + * + * Guests using NAT thus need to be prevented from having port + * numbers < 1023, otherwise they can bypass the NFS "security" + * check on the source port number. + * + * Since we use '--insert' to add rules to the header of the + * chain, we actually need to add them in the reverse of the + * order just mentioned ! + */ + + /* First the generic masquerade rule for other protocols */ + if (nftablesAddForwardMasquerade(fw, + &ipdef->address, + prefix, + forwardIf, + &def->forward.addr, + &def->forward.port, + NULL) < 0) + return -1; + + /* UDP with a source port restriction */ + if (nftablesAddForwardMasquerade(fw, + &ipdef->address, + prefix, + forwardIf, + &def->forward.addr, + &def->forward.port, + "udp") < 0) + return -1; + + /* TCP with a source port restriction */ + if (nftablesAddForwardMasquerade(fw, + &ipdef->address, + prefix, + forwardIf, + &def->forward.addr, + &def->forward.port, + "tcp") < 0) + return -1; + + /* exempt local network broadcast address as destination */ + if (isIPv4 && + nftablesAddDontMasquerade(fw, + &ipdef->address, + prefix, + forwardIf, + networkLocalBroadcast) < 0) + return -1; + + /* exempt local multicast range as destination */ + if (nftablesAddDontMasquerade(fw, + &ipdef->address, + prefix, + forwardIf, + isIPv4 ? networkLocalMulticastIPv4 : + networkLocalMulticastIPv6) < 0) + return -1; + + return 0; +} + + +static int +nftablesAddRoutingFirewallRules(virFirewall *fw, + virNetworkDef *def, + virNetworkIPDef *ipdef) +{ + int prefix = virNetworkIPDefPrefix(ipdef); + const char *forwardIf = virNetworkDefForwardIf(def, 0); + + if (prefix < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, + _("Invalid prefix or netmask for '%1$s'"), + def->bridge); + return -1; + } + + /* allow routing packets from the bridge interface */ + if (nftablesAddForwardAllowOut(fw, + &ipdef->address, + prefix, + def->bridge, + forwardIf) < 0) + return -1; + + /* allow routing packets to the bridge interface */ + if (nftablesAddForwardAllowIn(fw, + &ipdef->address, + prefix, + def->bridge, + forwardIf) < 0) + return -1; + + return 0; +} + + +static void +nftablesAddGeneralIPv4FirewallRules(virFirewall *fw, + virNetworkDef *def) +{ + size_t i; + virNetworkIPDef *ipv4def; + + /* First look for first IPv4 address that has dhcp or tftpboot defined. */ + /* We support dhcp config on 1 IPv4 interface only. */ + for (i = 0; + (ipv4def = virNetworkDefGetIPByIndex(def, AF_INET, i)); + i++) { + if (ipv4def->nranges || ipv4def->nhosts || ipv4def->tftproot) + break; + } + + /* allow DHCP requests through to dnsmasq & back out */ + nftablesAddTcpInput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 67); + nftablesAddUdpInput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 67); + nftablesAddTcpOutput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 68); + nftablesAddUdpOutput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 68); + + /* allow DNS requests through to dnsmasq & back out */ + nftablesAddTcpInput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 53); + nftablesAddUdpInput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 53); + nftablesAddTcpOutput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 53); + nftablesAddUdpOutput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 53); + + /* allow TFTP requests through to dnsmasq if necessary & back out */ + if (ipv4def && ipv4def->tftproot) { + nftablesAddUdpInput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 69); + nftablesAddUdpOutput(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge, 69); + } + + /* Catch all rules to block forwarding to/from bridges */ + nftablesAddForwardRejectOut(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge); + nftablesAddForwardRejectIn(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge); + + /* Allow traffic between guests on the same bridge */ + nftablesAddForwardAllowCross(fw, VIR_FIREWALL_LAYER_IPV4, def->bridge); +} + + +/* Add all once/network rules required for IPv6. + * If no IPv6 addresses are defined and <network ipv6='yes'> is + * specified, then allow IPv6 communications between virtual systems. + * If any IPv6 addresses are defined, then add the rules for regular operation. + */ +static void +nftablesAddGeneralIPv6FirewallRules(virFirewall *fw, + virNetworkDef *def) +{ + if (!virNetworkDefGetIPByIndex(def, AF_INET6, 0) && + !def->ipv6nogw) { + return; + } + + /* Catch all rules to block forwarding to/from bridges */ + nftablesAddForwardRejectOut(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge); + nftablesAddForwardRejectIn(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge); + + /* Allow traffic between guests on the same bridge */ + nftablesAddForwardAllowCross(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge); + + if (virNetworkDefGetIPByIndex(def, AF_INET6, 0)) { + /* allow DNS over IPv6 & back out */ + nftablesAddTcpInput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 53); + nftablesAddUdpInput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 53); + nftablesAddTcpOutput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 53); + nftablesAddUdpOutput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 53); + /* allow DHCPv6 & back out */ + nftablesAddUdpInput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 547); + nftablesAddUdpOutput(fw, VIR_FIREWALL_LAYER_IPV6, def->bridge, 546); + } +} + + +static void +nftablesAddGeneralFirewallRules(virFirewall *fw, + virNetworkDef *def) +{ + nftablesAddGeneralIPv4FirewallRules(fw, def); + nftablesAddGeneralIPv6FirewallRules(fw, def); +} + + +static int +nftablesAddIPSpecificFirewallRules(virFirewall *fw, + virNetworkDef *def, + virNetworkIPDef *ipdef) +{ + /* NB: in the case of IPv6, routing rules are added when the + * forward mode is NAT. This is because IPv6 has no NAT. + */ + + if (def->forward.type == VIR_NETWORK_FORWARD_NAT) { + if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET) || + def->forward.natIPv6 == VIR_TRISTATE_BOOL_YES) + return nftablesAddMasqueradingFirewallRules(fw, def, ipdef); + else if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET6)) + return nftablesAddRoutingFirewallRules(fw, def, ipdef); + } else if (def->forward.type == VIR_NETWORK_FORWARD_ROUTE) { + return nftablesAddRoutingFirewallRules(fw, def, ipdef); + } + return 0; +} + + +/* nftablesAddFirewallrules: + * + * @def - the network that needs an nftables firewall added + * @fwRemoval - if this is not NULL, it points to a pointer + * that should be filled in with a virFirewall object containing + * all the commands needed to remove this firewall at a later time. + * + * Add all rules for all ip addresses (and general rules) on a + * network, and optionally return a virFirewall object containing all + * the rules needed to later remove the firewall that has been added. + */ +int +nftablesAddFirewallRules(virNetworkDef *def, virFirewall **fwRemoval) +{ + size_t i; + virNetworkIPDef *ipdef; + g_autoptr(virFirewall) fw = virFirewallNew(VIR_FIREWALL_BACKEND_NFTABLES); + + virFirewallStartTransaction(fw, VIR_FIREWALL_TRANSACTION_AUTO_ROLLBACK); + + nftablesAddGeneralFirewallRules(fw, def); + + for (i = 0; + (ipdef = virNetworkDefGetIPByIndex(def, AF_UNSPEC, i)); + i++) { + if (nftablesAddIPSpecificFirewallRules(fw, def, ipdef) < 0) + return -1; + } + + if (virFirewallApply(fw) < 0) + return -1; + + if (fwRemoval) { + /* caller wants us to create a virFirewall object that can be + * applied to undo everything that was just done by * virFirewallApply() + */ + + if (virFirewallNewFromRollback(fw, fwRemoval) < 0) + return -1; + } + + return 0; +} diff --git a/src/network/network_nftables.h b/src/network/network_nftables.h new file mode 100644 index 0000000000..5abae3a423 --- /dev/null +++ b/src/network/network_nftables.h @@ -0,0 +1,28 @@ +/* + * network_nftables.h: helper APIs for managing nftables in network driver + * + * Copyright (C) 2024 Red Hat, Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library. If not, see + * <http://www.gnu.org/licenses/>. + */ + +#pragma once + +#include "virfirewall.h" +#include "network_conf.h" + +int nftablesAddFirewallRules(virNetworkDef *def, virFirewall **fwRemoval); + +int nftablesSetupPrivateChains(virFirewallLayer layer); diff --git a/src/util/virfirewall.c b/src/util/virfirewall.c index e08d503ac9..4b3b7117d8 100644 --- a/src/util/virfirewall.c +++ b/src/util/virfirewall.c @@ -37,7 +37,8 @@ VIR_LOG_INIT("util.firewall"); VIR_ENUM_IMPL(virFirewallBackend, VIR_FIREWALL_BACKEND_LAST, - "iptables"); + "iptables", + "nftables"); VIR_ENUM_DECL(virFirewallLayer); VIR_ENUM_IMPL(virFirewallLayer, @@ -653,6 +654,153 @@ virFirewallCmdIptablesApply(virFirewall *firewall, } +#define VIR_NFTABLES_ARG_IS_CREATE(arg) \ + (STREQ(arg, "insert") || STREQ(arg, "add") || STREQ(arg, "create")) + +static int +virFirewallCmdNftablesApply(virFirewall *firewall G_GNUC_UNUSED, + virFirewallCmd *fwCmd, + char **output) +{ + bool needRollback = false; + size_t cmdIdx = 0; + const char *objectType = NULL; + g_autoptr(virCommand) cmd = NULL; + g_autofree char *cmdStr = NULL; + g_autofree char *error = NULL; + size_t i; + int status; + + cmd = virCommandNew(NFT); + + if ((virFirewallTransactionGetFlags(firewall) & VIR_FIREWALL_TRANSACTION_AUTO_ROLLBACK) && + fwCmd->argsLen > 1) { + /* skip any leading options to get to command verb */ + for (i = 0; i < fwCmd->argsLen - 1; i++) { + if (fwCmd->args[i][0] != '-') + break; + } + + if (i + 1 < fwCmd->argsLen && + VIR_NFTABLES_ARG_IS_CREATE(fwCmd->args[i])) { + + cmdIdx = i; + objectType = fwCmd->args[i + 1]; + + /* we currently only handle auto-rollback for rules, + * chains, and tables, and those all can be "rolled + * back" by a delete command using the handle that is + * returned when "-ae" is added to the add/insert + * command. + */ + if (STREQ_NULLABLE(objectType, "rule") || + STREQ_NULLABLE(objectType, "chain") || + STREQ_NULLABLE(objectType, "table")) { + + needRollback = true; + /* this option to nft instructs it to add the + * "handle" of the created object to stdout + */ + virCommandAddArg(cmd, "-ae"); + } + } + } + + for (i = 0; i < fwCmd->argsLen; i++) + virCommandAddArg(cmd, fwCmd->args[i]); + + cmdStr = virCommandToString(cmd, false); + VIR_INFO("Applying '%s'", NULLSTR(cmdStr)); + + virCommandSetOutputBuffer(cmd, output); + virCommandSetErrorBuffer(cmd, &error); + + if (virCommandRun(cmd, &status) < 0) + return -1; + + if (status != 0) { + if (STREQ_NULLABLE(fwCmd->args[0], "list")) { + /* nft returns error status when the target of a "list" + * command doesn't exist, but we always want to just have + * an empty result, so this is not actually an error. + */ + } else if (fwCmd->ignoreErrors) { + VIR_DEBUG("Ignoring error running command"); + } else { + virReportError(VIR_ERR_INTERNAL_ERROR, + _("Failed to apply firewall command '%1$s': %2$s"), + NULLSTR(cmdStr), NULLSTR(error)); + VIR_FREE(*output); + return -1; + } + + /* there was an error, so we won't be building any rollback command, + * but the error should be ignored, so we return success + */ + return 0; + } + + if (needRollback) { + virFirewallCmd *rollback = virFirewallAddRollbackCmd(firewall, fwCmd->layer, NULL); + const char *handleStart = NULL; + size_t handleLen = 0; + g_autofree char *handleStr = NULL; + g_autofree char *rollbackStr = NULL; + + /* Search for "# handle n" in stdout of the nft add command - + * that is the handle of the table/rule/chain that will later + * need to be deleted. + */ + + if ((handleStart = strstr(*output, "# handle "))) { + handleStart += 9; /* move past "# handle " */ + handleLen = strspn(handleStart, "0123456789"); + } + + if (!handleLen) { + virReportError(VIR_ERR_INTERNAL_ERROR, + _("couldn't register rollback command - command '%1$s' had no valid handle in output ('%2$s')"), + NULLSTR(cmdStr), NULLSTR(*output)); + return -1; + } + + handleStr = g_strdup_printf("%.*s", (int)handleLen, handleStart); + + /* The rollback command is created from the original command like this: + * + * 1) skip any leading options + * 2) replace add/insert with delete + * 3) keep the type of item being added (rule/chain/table) + * 4) keep the class (ip/ip6/inet) + * 5) for chain/rule, keep the table name + * 6) for rule, keep the chain name + * 7) add "handle n" where "n" is parsed from the + * stdout of the original nft command + */ + virFirewallCmdAddArgList(firewall, rollback, "delete", objectType, + fwCmd->args[cmdIdx + 2], /* ip/ip6/inet */ + NULL); + + if (STREQ_NULLABLE(objectType, "rule") || + STREQ_NULLABLE(objectType, "chain")) { + /* include table name in command */ + virFirewallCmdAddArg(firewall, rollback, fwCmd->args[cmdIdx + 3]); + } + + if (STREQ_NULLABLE(objectType, "rule")) { + /* include chain name in command */ + virFirewallCmdAddArg(firewall, rollback, fwCmd->args[cmdIdx + 4]); + } + + virFirewallCmdAddArgList(firewall, rollback, "handle", handleStr, NULL); + + rollbackStr = virFirewallCmdToString(NFT, rollback); + VIR_DEBUG("Recording Rollback command '%s'", NULLSTR(rollbackStr)); + } + return 0; +} + + static int virFirewallApplyCmd(virFirewall *firewall, virFirewallCmd *fwCmd) @@ -666,8 +814,23 @@ virFirewallApplyCmd(virFirewall *firewall, return -1; } - if (virFirewallCmdIptablesApply(firewall, fwCmd, &output) < 0) + switch (virFirewallGetBackend(firewall)) { + case VIR_FIREWALL_BACKEND_IPTABLES: + if (virFirewallCmdIptablesApply(firewall, fwCmd, &output) < 0) + return -1; + break; + + case VIR_FIREWALL_BACKEND_NFTABLES: + if (virFirewallCmdNftablesApply(firewall, fwCmd, &output) < 0) + return -1; + break; + + case VIR_FIREWALL_BACKEND_LAST: + default: + virReportEnumRangeError(virFirewallBackend, + virFirewallGetBackend(firewall)); return -1; + } if (fwCmd->queryCB && output) { if (!(lines = g_strsplit(output, "\n", -1))) diff --git a/src/util/virfirewall.h b/src/util/virfirewall.h index 4ac16f02b3..302a6a4e5b 100644 --- a/src/util/virfirewall.h +++ b/src/util/virfirewall.h @@ -29,6 +29,7 @@ #define EBTABLES "ebtables" #define IPTABLES "iptables" #define IP6TABLES "ip6tables" +#define NFT "nft" typedef struct _virFirewall virFirewall; @@ -44,6 +45,7 @@ typedef enum { typedef enum { VIR_FIREWALL_BACKEND_IPTABLES, + VIR_FIREWALL_BACKEND_NFTABLES, VIR_FIREWALL_BACKEND_LAST, } virFirewallBackend; -- 2.44.0
Run all the networkxml2firewall tests twice - once with iptables backend, and once with the nftables backend. The results files for the existing iptables tests were previously named *.args. That has been changed to *.iptables, and the results files for the new nftables tests are named *.nftables. Signed-off-by: Laine Stump <laine@redhat.com> --- Change from V2: * add in the chunk about looking for "-ae" option that had been accidentally put in patch 16. .../{base.args => base.iptables} | 0 tests/networkxml2firewalldata/base.nftables | 256 ++++++++++ ...-linux.args => nat-default-linux.iptables} | 0 .../nat-default-linux.nftables | 248 +++++++++ ...pv6-linux.args => nat-ipv6-linux.iptables} | 0 .../nat-ipv6-linux.nftables | 384 ++++++++++++++ ...rgs => nat-ipv6-masquerade-linux.iptables} | 0 .../nat-ipv6-masquerade-linux.nftables | 456 +++++++++++++++++ ...linux.args => nat-many-ips-linux.iptables} | 0 .../nat-many-ips-linux.nftables | 472 ++++++++++++++++++ ...-linux.args => nat-no-dhcp-linux.iptables} | 0 .../nat-no-dhcp-linux.nftables | 384 ++++++++++++++ ...ftp-linux.args => nat-tftp-linux.iptables} | 0 .../nat-tftp-linux.nftables | 274 ++++++++++ ...inux.args => route-default-linux.iptables} | 0 .../route-default-linux.nftables | 162 ++++++ tests/networkxml2firewalltest.c | 56 ++- 17 files changed, 2678 insertions(+), 14 deletions(-) rename tests/networkxml2firewalldata/{base.args => base.iptables} (100%) create mode 100644 tests/networkxml2firewalldata/base.nftables rename tests/networkxml2firewalldata/{nat-default-linux.args => nat-default-linux.iptables} (100%) create mode 100644 tests/networkxml2firewalldata/nat-default-linux.nftables rename tests/networkxml2firewalldata/{nat-ipv6-linux.args => nat-ipv6-linux.iptables} (100%) create mode 100644 tests/networkxml2firewalldata/nat-ipv6-linux.nftables rename tests/networkxml2firewalldata/{nat-ipv6-masquerade-linux.args => nat-ipv6-masquerade-linux.iptables} (100%) create mode 100644 tests/networkxml2firewalldata/nat-ipv6-masquerade-linux.nftables rename tests/networkxml2firewalldata/{nat-many-ips-linux.args => nat-many-ips-linux.iptables} (100%) create mode 100644 tests/networkxml2firewalldata/nat-many-ips-linux.nftables rename tests/networkxml2firewalldata/{nat-no-dhcp-linux.args => nat-no-dhcp-linux.iptables} (100%) create mode 100644 tests/networkxml2firewalldata/nat-no-dhcp-linux.nftables rename tests/networkxml2firewalldata/{nat-tftp-linux.args => nat-tftp-linux.iptables} (100%) create mode 100644 tests/networkxml2firewalldata/nat-tftp-linux.nftables rename tests/networkxml2firewalldata/{route-default-linux.args => route-default-linux.iptables} (100%) create mode 100644 tests/networkxml2firewalldata/route-default-linux.nftables diff --git a/tests/networkxml2firewalldata/base.args b/tests/networkxml2firewalldata/base.iptables similarity index 100% rename from tests/networkxml2firewalldata/base.args rename to tests/networkxml2firewalldata/base.iptables diff --git a/tests/networkxml2firewalldata/base.nftables b/tests/networkxml2firewalldata/base.nftables new file mode 100644 index 0000000000..4f1f475a85 --- /dev/null +++ b/tests/networkxml2firewalldata/base.nftables @@ -0,0 +1,256 @@ +nft \ +list \ +table \ +ip \ +libvirt +nft \ +add \ +table \ +ip \ +libvirt +nft \ +add \ +chain \ +ip \ +libvirt \ +INPUT \ +'{ type filter hook input priority 0; policy accept; }' +nft \ +add \ +chain \ +ip \ +libvirt \ +FORWARD \ +'{ type filter hook forward priority 0; policy accept; }' +nft \ +add \ +chain \ +ip \ +libvirt \ +OUTPUT \ +'{ type filter hook output priority 0; policy accept; }' +nft \ +add \ +chain \ +ip \ +libvirt \ +LIBVIRT_INP +nft \ +insert \ +rule \ +ip \ +libvirt \ +INPUT \ +counter \ +jump \ +LIBVIRT_INP +nft \ +add \ +chain \ +ip \ +libvirt \ +LIBVIRT_OUT +nft \ +insert \ +rule \ +ip \ +libvirt \ +OUTPUT \ +counter \ +jump \ +LIBVIRT_OUT +nft \ +add \ +chain \ +ip \ +libvirt \ +LIBVIRT_FWO +nft \ +insert \ +rule \ +ip \ +libvirt \ +FORWARD \ +counter \ +jump \ +LIBVIRT_FWO +nft \ +add \ +chain \ +ip \ +libvirt \ +LIBVIRT_FWI +nft \ +insert \ +rule \ +ip \ +libvirt \ +FORWARD \ +counter \ +jump \ +LIBVIRT_FWI +nft \ +add \ +chain \ +ip \ +libvirt \ +LIBVIRT_FWX +nft \ +insert \ +rule \ +ip \ +libvirt \ +FORWARD \ +counter \ +jump \ +LIBVIRT_FWX +nft \ +add \ +chain \ +ip \ +libvirt \ +POSTROUTING \ +'{ type nat hook postrouting priority 100; policy accept; }' +nft \ +add \ +chain \ +ip \ +libvirt \ +LIBVIRT_PRT +nft \ +insert \ +rule \ +ip \ +libvirt \ +POSTROUTING \ +counter \ +jump \ +LIBVIRT_PRT +nft \ +list \ +table \ +ip6 \ +libvirt +nft \ +add \ +table \ +ip6 \ +libvirt +nft \ +add \ +chain \ +ip6 \ +libvirt \ +INPUT \ +'{ type filter hook input priority 0; policy accept; }' +nft \ +add \ +chain \ +ip6 \ +libvirt \ +FORWARD \ +'{ type filter hook forward priority 0; policy accept; }' +nft \ +add \ +chain \ +ip6 \ +libvirt \ +OUTPUT \ +'{ type filter hook output priority 0; policy accept; }' +nft \ +add \ +chain \ +ip6 \ +libvirt \ +LIBVIRT_INP +nft \ +insert \ +rule \ +ip6 \ +libvirt \ +INPUT \ +counter \ +jump \ +LIBVIRT_INP +nft \ +add \ +chain \ +ip6 \ +libvirt \ +LIBVIRT_OUT +nft \ +insert \ +rule \ +ip6 \ +libvirt \ +OUTPUT \ +counter \ +jump \ +LIBVIRT_OUT +nft \ +add \ +chain \ +ip6 \ +libvirt \ +LIBVIRT_FWO +nft \ +insert \ +rule \ +ip6 \ +libvirt \ +FORWARD \ +counter \ +jump \ +LIBVIRT_FWO +nft \ +add \ +chain \ +ip6 \ +libvirt \ +LIBVIRT_FWI +nft \ +insert \ +rule \ +ip6 \ +libvirt \ +FORWARD \ +counter \ +jump \ +LIBVIRT_FWI +nft \ +add \ +chain \ +ip6 \ +libvirt \ +LIBVIRT_FWX +nft \ +insert \ +rule \ +ip6 \ +libvirt \ +FORWARD \ +counter \ +jump \ +LIBVIRT_FWX +nft \ +add \ +chain \ +ip6 \ +libvirt \ +POSTROUTING \ +'{ type nat hook postrouting priority 100; policy accept; }' +nft \ +add \ +chain \ +ip6 \ +libvirt \ +LIBVIRT_PRT +nft \ +insert \ +rule \ +ip6 \ +libvirt \ +POSTROUTING \ +counter \ +jump \ +LIBVIRT_PRT diff --git a/tests/networkxml2firewalldata/nat-default-linux.args b/tests/networkxml2firewalldata/nat-default-linux.iptables similarity index 100% rename from tests/networkxml2firewalldata/nat-default-linux.args rename to tests/networkxml2firewalldata/nat-default-linux.iptables diff --git a/tests/networkxml2firewalldata/nat-default-linux.nftables b/tests/networkxml2firewalldata/nat-default-linux.nftables new file mode 100644 index 0000000000..2dafe078a1 --- /dev/null +++ b/tests/networkxml2firewalldata/nat-default-linux.nftables @@ -0,0 +1,248 @@ +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +tcp \ +dport \ +67 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +udp \ +dport \ +67 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +tcp \ +dport \ +68 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +udp \ +dport \ +68 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +tcp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +udp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +tcp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +udp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWO \ +iifname \ +virbr0 \ +counter \ +reject +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWI \ +oifname \ +virbr0 \ +counter \ +reject +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWX \ +iifname \ +virbr0 \ +oifname \ +virbr0 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWO \ +ip \ +saddr \ +192.168.122.0/24 \ +iifname \ +virbr0 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWI \ +oifname \ +virbr0 \ +ip \ +daddr \ +192.168.122.0/24 \ +ct \ +state \ +related,established \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +'!=' \ +192.168.122.0/24 \ +counter \ +masquerade +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +meta \ +l4proto \ +udp \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +'!=' \ +192.168.122.0/24 \ +counter \ +masquerade \ +to \ +:1024-65535 +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +meta \ +l4proto \ +tcp \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +'!=' \ +192.168.122.0/24 \ +counter \ +masquerade \ +to \ +:1024-65535 +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +255.255.255.255/32 \ +counter \ +return +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +224.0.0.0/24 \ +counter \ +return diff --git a/tests/networkxml2firewalldata/nat-ipv6-linux.args b/tests/networkxml2firewalldata/nat-ipv6-linux.iptables similarity index 100% rename from tests/networkxml2firewalldata/nat-ipv6-linux.args rename to tests/networkxml2firewalldata/nat-ipv6-linux.iptables diff --git a/tests/networkxml2firewalldata/nat-ipv6-linux.nftables b/tests/networkxml2firewalldata/nat-ipv6-linux.nftables new file mode 100644 index 0000000000..63d4d8e2a5 --- /dev/null +++ b/tests/networkxml2firewalldata/nat-ipv6-linux.nftables @@ -0,0 +1,384 @@ +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +tcp \ +dport \ +67 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +udp \ +dport \ +67 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +tcp \ +dport \ +68 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +udp \ +dport \ +68 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +tcp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +udp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +tcp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +udp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWO \ +iifname \ +virbr0 \ +counter \ +reject +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWI \ +oifname \ +virbr0 \ +counter \ +reject +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWX \ +iifname \ +virbr0 \ +oifname \ +virbr0 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_FWO \ +iifname \ +virbr0 \ +counter \ +reject +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_FWI \ +oifname \ +virbr0 \ +counter \ +reject +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_FWX \ +iifname \ +virbr0 \ +oifname \ +virbr0 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +tcp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +udp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +tcp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +udp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +udp \ +dport \ +547 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +udp \ +dport \ +546 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWO \ +ip \ +saddr \ +192.168.122.0/24 \ +iifname \ +virbr0 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWI \ +oifname \ +virbr0 \ +ip \ +daddr \ +192.168.122.0/24 \ +ct \ +state \ +related,established \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +'!=' \ +192.168.122.0/24 \ +counter \ +masquerade +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +meta \ +l4proto \ +udp \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +'!=' \ +192.168.122.0/24 \ +counter \ +masquerade \ +to \ +:1024-65535 +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +meta \ +l4proto \ +tcp \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +'!=' \ +192.168.122.0/24 \ +counter \ +masquerade \ +to \ +:1024-65535 +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +255.255.255.255/32 \ +counter \ +return +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +224.0.0.0/24 \ +counter \ +return +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_FWO \ +ip6 \ +saddr \ +2001:db8:ca2:2::/64 \ +iifname \ +virbr0 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_FWI \ +ip6 \ +daddr \ +2001:db8:ca2:2::/64 \ +oifname \ +virbr0 \ +counter \ +accept diff --git a/tests/networkxml2firewalldata/nat-ipv6-masquerade-linux.args b/tests/networkxml2firewalldata/nat-ipv6-masquerade-linux.iptables similarity index 100% rename from tests/networkxml2firewalldata/nat-ipv6-masquerade-linux.args rename to tests/networkxml2firewalldata/nat-ipv6-masquerade-linux.iptables diff --git a/tests/networkxml2firewalldata/nat-ipv6-masquerade-linux.nftables b/tests/networkxml2firewalldata/nat-ipv6-masquerade-linux.nftables new file mode 100644 index 0000000000..e6d5dea661 --- /dev/null +++ b/tests/networkxml2firewalldata/nat-ipv6-masquerade-linux.nftables @@ -0,0 +1,456 @@ +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +tcp \ +dport \ +67 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +udp \ +dport \ +67 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +tcp \ +dport \ +68 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +udp \ +dport \ +68 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +tcp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +udp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +tcp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +udp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWO \ +iifname \ +virbr0 \ +counter \ +reject +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWI \ +oifname \ +virbr0 \ +counter \ +reject +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWX \ +iifname \ +virbr0 \ +oifname \ +virbr0 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_FWO \ +iifname \ +virbr0 \ +counter \ +reject +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_FWI \ +oifname \ +virbr0 \ +counter \ +reject +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_FWX \ +iifname \ +virbr0 \ +oifname \ +virbr0 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +tcp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +udp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +tcp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +udp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +udp \ +dport \ +547 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +udp \ +dport \ +546 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWO \ +ip \ +saddr \ +192.168.122.0/24 \ +iifname \ +virbr0 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWI \ +oifname \ +virbr0 \ +ip \ +daddr \ +192.168.122.0/24 \ +ct \ +state \ +related,established \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +'!=' \ +192.168.122.0/24 \ +counter \ +masquerade +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +meta \ +l4proto \ +udp \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +'!=' \ +192.168.122.0/24 \ +counter \ +masquerade \ +to \ +:1024-65535 +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +meta \ +l4proto \ +tcp \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +'!=' \ +192.168.122.0/24 \ +counter \ +masquerade \ +to \ +:1024-65535 +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +255.255.255.255/32 \ +counter \ +return +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +224.0.0.0/24 \ +counter \ +return +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_FWO \ +ip6 \ +saddr \ +2001:db8:ca2:2::/64 \ +iifname \ +virbr0 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_FWI \ +oifname \ +virbr0 \ +ip6 \ +daddr \ +2001:db8:ca2:2::/64 \ +ct \ +state \ +related,established \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_PRT \ +ip6 \ +saddr \ +2001:db8:ca2:2::/64 \ +ip6 \ +daddr \ +'!=' \ +2001:db8:ca2:2::/64 \ +counter \ +masquerade +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_PRT \ +meta \ +l4proto \ +udp \ +ip6 \ +saddr \ +2001:db8:ca2:2::/64 \ +ip6 \ +daddr \ +'!=' \ +2001:db8:ca2:2::/64 \ +counter \ +masquerade \ +to \ +:1024-65535 +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_PRT \ +meta \ +l4proto \ +tcp \ +ip6 \ +saddr \ +2001:db8:ca2:2::/64 \ +ip6 \ +daddr \ +'!=' \ +2001:db8:ca2:2::/64 \ +counter \ +masquerade \ +to \ +:1024-65535 +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_PRT \ +ip6 \ +saddr \ +2001:db8:ca2:2::/64 \ +ip6 \ +daddr \ +ff02::/16 \ +counter \ +return diff --git a/tests/networkxml2firewalldata/nat-many-ips-linux.args b/tests/networkxml2firewalldata/nat-many-ips-linux.iptables similarity index 100% rename from tests/networkxml2firewalldata/nat-many-ips-linux.args rename to tests/networkxml2firewalldata/nat-many-ips-linux.iptables diff --git a/tests/networkxml2firewalldata/nat-many-ips-linux.nftables b/tests/networkxml2firewalldata/nat-many-ips-linux.nftables new file mode 100644 index 0000000000..e636916c7e --- /dev/null +++ b/tests/networkxml2firewalldata/nat-many-ips-linux.nftables @@ -0,0 +1,472 @@ +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +tcp \ +dport \ +67 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +udp \ +dport \ +67 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +tcp \ +dport \ +68 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +udp \ +dport \ +68 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +tcp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +udp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +tcp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +udp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWO \ +iifname \ +virbr0 \ +counter \ +reject +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWI \ +oifname \ +virbr0 \ +counter \ +reject +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWX \ +iifname \ +virbr0 \ +oifname \ +virbr0 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWO \ +ip \ +saddr \ +192.168.122.0/24 \ +iifname \ +virbr0 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWI \ +oifname \ +virbr0 \ +ip \ +daddr \ +192.168.122.0/24 \ +ct \ +state \ +related,established \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +'!=' \ +192.168.122.0/24 \ +counter \ +masquerade +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +meta \ +l4proto \ +udp \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +'!=' \ +192.168.122.0/24 \ +counter \ +masquerade \ +to \ +:1024-65535 +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +meta \ +l4proto \ +tcp \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +'!=' \ +192.168.122.0/24 \ +counter \ +masquerade \ +to \ +:1024-65535 +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +255.255.255.255/32 \ +counter \ +return +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +224.0.0.0/24 \ +counter \ +return +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWO \ +ip \ +saddr \ +192.168.128.0/24 \ +iifname \ +virbr0 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWI \ +oifname \ +virbr0 \ +ip \ +daddr \ +192.168.128.0/24 \ +ct \ +state \ +related,established \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +ip \ +saddr \ +192.168.128.0/24 \ +ip \ +daddr \ +'!=' \ +192.168.128.0/24 \ +counter \ +masquerade +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +meta \ +l4proto \ +udp \ +ip \ +saddr \ +192.168.128.0/24 \ +ip \ +daddr \ +'!=' \ +192.168.128.0/24 \ +counter \ +masquerade \ +to \ +:1024-65535 +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +meta \ +l4proto \ +tcp \ +ip \ +saddr \ +192.168.128.0/24 \ +ip \ +daddr \ +'!=' \ +192.168.128.0/24 \ +counter \ +masquerade \ +to \ +:1024-65535 +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +ip \ +saddr \ +192.168.128.0/24 \ +ip \ +daddr \ +255.255.255.255/32 \ +counter \ +return +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +ip \ +saddr \ +192.168.128.0/24 \ +ip \ +daddr \ +224.0.0.0/24 \ +counter \ +return +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWO \ +ip \ +saddr \ +192.168.150.0/24 \ +iifname \ +virbr0 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWI \ +oifname \ +virbr0 \ +ip \ +daddr \ +192.168.150.0/24 \ +ct \ +state \ +related,established \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +ip \ +saddr \ +192.168.150.0/24 \ +ip \ +daddr \ +'!=' \ +192.168.150.0/24 \ +counter \ +masquerade +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +meta \ +l4proto \ +udp \ +ip \ +saddr \ +192.168.150.0/24 \ +ip \ +daddr \ +'!=' \ +192.168.150.0/24 \ +counter \ +masquerade \ +to \ +:1024-65535 +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +meta \ +l4proto \ +tcp \ +ip \ +saddr \ +192.168.150.0/24 \ +ip \ +daddr \ +'!=' \ +192.168.150.0/24 \ +counter \ +masquerade \ +to \ +:1024-65535 +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +ip \ +saddr \ +192.168.150.0/24 \ +ip \ +daddr \ +255.255.255.255/32 \ +counter \ +return +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +ip \ +saddr \ +192.168.150.0/24 \ +ip \ +daddr \ +224.0.0.0/24 \ +counter \ +return diff --git a/tests/networkxml2firewalldata/nat-no-dhcp-linux.args b/tests/networkxml2firewalldata/nat-no-dhcp-linux.iptables similarity index 100% rename from tests/networkxml2firewalldata/nat-no-dhcp-linux.args rename to tests/networkxml2firewalldata/nat-no-dhcp-linux.iptables diff --git a/tests/networkxml2firewalldata/nat-no-dhcp-linux.nftables b/tests/networkxml2firewalldata/nat-no-dhcp-linux.nftables new file mode 100644 index 0000000000..63d4d8e2a5 --- /dev/null +++ b/tests/networkxml2firewalldata/nat-no-dhcp-linux.nftables @@ -0,0 +1,384 @@ +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +tcp \ +dport \ +67 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +udp \ +dport \ +67 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +tcp \ +dport \ +68 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +udp \ +dport \ +68 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +tcp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +udp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +tcp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +udp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWO \ +iifname \ +virbr0 \ +counter \ +reject +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWI \ +oifname \ +virbr0 \ +counter \ +reject +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWX \ +iifname \ +virbr0 \ +oifname \ +virbr0 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_FWO \ +iifname \ +virbr0 \ +counter \ +reject +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_FWI \ +oifname \ +virbr0 \ +counter \ +reject +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_FWX \ +iifname \ +virbr0 \ +oifname \ +virbr0 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +tcp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +udp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +tcp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +udp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +udp \ +dport \ +547 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +udp \ +dport \ +546 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWO \ +ip \ +saddr \ +192.168.122.0/24 \ +iifname \ +virbr0 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWI \ +oifname \ +virbr0 \ +ip \ +daddr \ +192.168.122.0/24 \ +ct \ +state \ +related,established \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +'!=' \ +192.168.122.0/24 \ +counter \ +masquerade +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +meta \ +l4proto \ +udp \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +'!=' \ +192.168.122.0/24 \ +counter \ +masquerade \ +to \ +:1024-65535 +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +meta \ +l4proto \ +tcp \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +'!=' \ +192.168.122.0/24 \ +counter \ +masquerade \ +to \ +:1024-65535 +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +255.255.255.255/32 \ +counter \ +return +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +224.0.0.0/24 \ +counter \ +return +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_FWO \ +ip6 \ +saddr \ +2001:db8:ca2:2::/64 \ +iifname \ +virbr0 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip6 \ +libvirt \ +LIBVIRT_FWI \ +ip6 \ +daddr \ +2001:db8:ca2:2::/64 \ +oifname \ +virbr0 \ +counter \ +accept diff --git a/tests/networkxml2firewalldata/nat-tftp-linux.args b/tests/networkxml2firewalldata/nat-tftp-linux.iptables similarity index 100% rename from tests/networkxml2firewalldata/nat-tftp-linux.args rename to tests/networkxml2firewalldata/nat-tftp-linux.iptables diff --git a/tests/networkxml2firewalldata/nat-tftp-linux.nftables b/tests/networkxml2firewalldata/nat-tftp-linux.nftables new file mode 100644 index 0000000000..bb0598d011 --- /dev/null +++ b/tests/networkxml2firewalldata/nat-tftp-linux.nftables @@ -0,0 +1,274 @@ +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +tcp \ +dport \ +67 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +udp \ +dport \ +67 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +tcp \ +dport \ +68 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +udp \ +dport \ +68 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +tcp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +udp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +tcp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +udp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +udp \ +dport \ +69 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +udp \ +dport \ +69 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWO \ +iifname \ +virbr0 \ +counter \ +reject +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWI \ +oifname \ +virbr0 \ +counter \ +reject +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWX \ +iifname \ +virbr0 \ +oifname \ +virbr0 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWO \ +ip \ +saddr \ +192.168.122.0/24 \ +iifname \ +virbr0 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWI \ +oifname \ +virbr0 \ +ip \ +daddr \ +192.168.122.0/24 \ +ct \ +state \ +related,established \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +'!=' \ +192.168.122.0/24 \ +counter \ +masquerade +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +meta \ +l4proto \ +udp \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +'!=' \ +192.168.122.0/24 \ +counter \ +masquerade \ +to \ +:1024-65535 +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +meta \ +l4proto \ +tcp \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +'!=' \ +192.168.122.0/24 \ +counter \ +masquerade \ +to \ +:1024-65535 +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +255.255.255.255/32 \ +counter \ +return +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_PRT \ +ip \ +saddr \ +192.168.122.0/24 \ +ip \ +daddr \ +224.0.0.0/24 \ +counter \ +return diff --git a/tests/networkxml2firewalldata/route-default-linux.args b/tests/networkxml2firewalldata/route-default-linux.iptables similarity index 100% rename from tests/networkxml2firewalldata/route-default-linux.args rename to tests/networkxml2firewalldata/route-default-linux.iptables diff --git a/tests/networkxml2firewalldata/route-default-linux.nftables b/tests/networkxml2firewalldata/route-default-linux.nftables new file mode 100644 index 0000000000..834f6366ae --- /dev/null +++ b/tests/networkxml2firewalldata/route-default-linux.nftables @@ -0,0 +1,162 @@ +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +tcp \ +dport \ +67 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +udp \ +dport \ +67 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +tcp \ +dport \ +68 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +udp \ +dport \ +68 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +tcp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_INP \ +iifname \ +virbr0 \ +udp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +tcp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_OUT \ +oifname \ +virbr0 \ +udp \ +dport \ +53 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWO \ +iifname \ +virbr0 \ +counter \ +reject +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWI \ +oifname \ +virbr0 \ +counter \ +reject +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWX \ +iifname \ +virbr0 \ +oifname \ +virbr0 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWO \ +ip \ +saddr \ +192.168.122.0/24 \ +iifname \ +virbr0 \ +counter \ +accept +nft \ +-ae insert \ +rule \ +ip \ +libvirt \ +LIBVIRT_FWI \ +ip \ +daddr \ +192.168.122.0/24 \ +oifname \ +virbr0 \ +counter \ +accept diff --git a/tests/networkxml2firewalltest.c b/tests/networkxml2firewalltest.c index 082979e5dc..4cabe39d1d 100644 --- a/tests/networkxml2firewalltest.c +++ b/tests/networkxml2firewalltest.c @@ -79,13 +79,21 @@ testCommandDryRun(const char *const*args G_GNUC_UNUSED, void *opaque G_GNUC_UNUSED) { *status = 0; - *output = g_strdup(""); + /* if arg[1] is -ae then this is an nft command, + * and the caller requested to get the handle + * of the newly added object in stdout + */ + if (STREQ_NULLABLE(args[1], "-ae")) + *output = g_strdup("# handle 5309"); + else + *output = g_strdup(""); *error = g_strdup(""); } static int testCompareXMLToArgvFiles(const char *xml, const char *cmdline, - const char *baseargs) + const char *baseargs, + virFirewallBackend backend) { g_autofree char *actualargv = NULL; g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER; @@ -98,7 +106,7 @@ static int testCompareXMLToArgvFiles(const char *xml, if (!(def = virNetworkDefParse(NULL, xml, NULL, false))) return -1; - if (networkAddFirewallRules(def, VIR_FIREWALL_BACKEND_IPTABLES, NULL) < 0) + if (networkAddFirewallRules(def, backend, NULL) < 0) return -1; actual = actualargv = virBufferContentAndReset(&buf); @@ -119,6 +127,7 @@ static int testCompareXMLToArgvFiles(const char *xml, struct testInfo { const char *name; const char *baseargs; + virFirewallBackend backend; }; @@ -132,10 +141,11 @@ testCompareXMLToIPTablesHelper(const void *data) xml = g_strdup_printf("%s/networkxml2firewalldata/%s.xml", abs_srcdir, info->name); - args = g_strdup_printf("%s/networkxml2firewalldata/%s-%s.args", - abs_srcdir, info->name, RULESTYPE); + args = g_strdup_printf("%s/networkxml2firewalldata/%s-%s.%s", + abs_srcdir, info->name, RULESTYPE, + virFirewallBackendTypeToString(info->backend)); - result = testCompareXMLToArgvFiles(xml, args, info->baseargs); + result = testCompareXMLToArgvFiles(xml, args, info->baseargs, info->backend); return result; } @@ -145,24 +155,42 @@ static int mymain(void) { int ret = 0; - g_autofree char *basefile = NULL; - g_autofree char *baseargs = NULL; + g_autofree char *basefileIptables = NULL; + g_autofree char *basefileNftables = NULL; + g_autofree char *baseargsIptables = NULL; + g_autofree char *baseargsNftables = NULL; + const char *baseargs[VIR_FIREWALL_BACKEND_LAST]; -# define DO_TEST(name) \ +# define DO_TEST_FOR_BACKEND(name, backend) \ do { \ struct testInfo info = { \ - name, baseargs, \ + name, baseargs[backend], backend \ }; \ - if (virTestRun("Network XML-2-iptables " name, \ - testCompareXMLToIPTablesHelper, &info) < 0) \ + g_autofree char *label = g_strdup_printf("Network XML-2-%s %s", \ + virFirewallBackendTypeToString(backend), \ + name); \ + if (virTestRun(label, testCompareXMLToIPTablesHelper, &info) < 0) \ ret = -1; \ } while (0) - basefile = g_strdup_printf("%s/networkxml2firewalldata/base.args", abs_srcdir); +# define DO_TEST(name) \ + DO_TEST_FOR_BACKEND(name, VIR_FIREWALL_BACKEND_IPTABLES); \ + DO_TEST_FOR_BACKEND(name, VIR_FIREWALL_BACKEND_NFTABLES); - if (virFileReadAll(basefile, INT_MAX, &baseargs) < 0) + + basefileIptables = g_strdup_printf("%s/networkxml2firewalldata/base.iptables", abs_srcdir); + if (virFileReadAll(basefileIptables, INT_MAX, &baseargsIptables) < 0) return EXIT_FAILURE; + baseargs[VIR_FIREWALL_BACKEND_IPTABLES] = baseargsIptables; + + basefileNftables = g_strdup_printf("%s/networkxml2firewalldata/base.nftables", abs_srcdir); + if (virFileReadAll(basefileNftables, INT_MAX, &baseargsNftables) < 0) + return EXIT_FAILURE; + + baseargs[VIR_FIREWALL_BACKEND_NFTABLES] = baseargsNftables; + + DO_TEST("nat-default"); DO_TEST("nat-tftp"); DO_TEST("nat-many-ips"); -- 2.44.0
The patch that added the nftables backend for virtual networks left iptables as the default backend when both nftables and iptables are installed. The only functional difference between the two backends is that the nftables backend doesn't add any rules to fix up the checksum of DHCP packets, which will cause failures on guests with very old OSes (e.g. RHEL5) that have a virtio-net network interface using vhost packet processing (the default), connected to a libvirt virtual network, and configured to acquire the interface IP using DHCP. Since RHEL5 has been out of support for several years already, we might as well start off nftables support right by making it the default. Distros that aren't quite ready to default to nftables (e.g. maybe they're rebasing libvirt within a release and don't want to surprise anyone with an automatic switch from iptables to nftables) can simply run meson with "-Dfirewall_backend=iptables" during their official package build. In the extremely unlikely case that this causes a problem for a user, they can work around the failure by adding "<driver name='qemu'/> to the guest <interface> element. Signed-off-by: Laine Stump <laine@redhat.com> --- Change from V2: * greatly simplified because all that's required now is to change a single word in meson_options.txt meson_options.txt | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/meson_options.txt b/meson_options.txt index 367629f5dc..b68bd52477 100644 --- a/meson_options.txt +++ b/meson_options.txt @@ -98,7 +98,7 @@ option('chrdev_lock_files', type: 'string', value: '', description: 'location fo option('dtrace', type: 'feature', value: 'auto', description: 'use dtrace for static probing') option('firewalld', type: 'feature', value: 'auto', description: 'firewalld support') option('firewalld_zone', type: 'feature', value: 'auto', description: 'whether to install firewalld libvirt zone') -option('firewall_backend', type: 'string', value: 'iptables', description: 'which firewall backend to use by default when none is specified') +option('firewall_backend', type: 'string', value: 'nftables', description: 'which firewall backend to use by default when none is specified') option('host_validate', type: 'feature', value: 'auto', description: 'build virt-host-validate') option('init_script', type: 'combo', choices: ['systemd', 'openrc', 'check', 'none'], value: 'check', description: 'Style of init script to install') option('loader_nvram', type: 'string', value: '', description: 'Pass list of pairs of <loader>:<nvram> paths. Both pairs and list items are separated by a colon.') -- 2.44.0
This makes it possible to uninstall iptables, as long as nftables is installed. Signed-off-by: Laine Stump <laine@redhat.com> --- Change from V2: * Require one or the other instead of recommending both. libvirt.spec.in | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libvirt.spec.in b/libvirt.spec.in index 05f7a7e7c0..55f32172b3 100644 --- a/libvirt.spec.in +++ b/libvirt.spec.in @@ -592,7 +592,7 @@ Summary: Network driver plugin for the libvirtd daemon Requires: libvirt-daemon-common = %{version}-%{release} Requires: libvirt-libs = %{version}-%{release} Requires: dnsmasq >= 2.41 -Requires: iptables +Requires: (iptables or nftables) %description daemon-driver-network The network driver plugin for the libvirtd daemon, providing -- 2.44.0
*sigh*. After posting these last night, I checked on my CI pipeline and found that everything had failed due to #if defined(FIREWALL_BACKEND_DEFAULT_IPTABLES) [...] #elif defined (FIREWALL_BACKEND_DEFAULT_IPTABLES) [...] #else #error blah blah #endif I've pushed fixed patches to gitlab, where you can find them at: https://gitlab.com/lainestump/libvirt/tree/nftrereboot-7 or alternately, just change the 2nd "IPTABLES" above to "NFTABLES" in patch 24/27. w On 4/25/24 1:38 AM, Laine Stump wrote:
V2: https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/thread/5RTZ6...
This patch series enables libvirt to use nftables rules rather than iptables *when setting up virtual networks* (it does *not* add nftables support to the nwfilter driver).
I've added the Reviewed-by's from Daniel where given in V2 (as long as I haven't made any non-trivial changes). That includes patches 1-9, 11-13, 16, 20, and 22.
Changes from V2 - mainly I've addressed the issues that Dan pointed out in his reviews (details in each patch). Functionally the main changes are:
1) You can now choose whether iptables or nftables should be the default backend with the new meson option "firewall_backend" (which is set to "nftables" by default).
2) rpm spec now requires iptables or nftables (rather than recommending both)
3) The <firewall> element in the network status XML now has a "name='fwRemoval'" attribute, just in case we ever add another <firewall> element to keep track of all the commands that were run to create the firewall as well as the commands needed to remove it.
4) Failure to find the binary needed for any firewall backend now results in an error log and termination of the daemon.
Laine Stump (27): util/network: move viriptables.[ch] from util to network directory network: move all functions manipulating iptables rules into network_iptables.c network: make all iptables functions used only in network_iptables.c static util: #define the names used for private packet filter chains util: change name of virFirewallRule to virFirewallCmd util: rename virNetFilterAction to iptablesAction, and add VIR_ENUM_DECL/IMPL util: check for 0 args when applying iptables rule util: add -w/--concurrent when applying a FirewallCmd rather than when building it util: determine ignoreErrors value when creating virFirewallCmd, not when applying util/network: new virFirewallBackend enum network: add (empty) network.conf file to distribution files network: support setting firewallBackend from network.conf network: framework to call backend-specific function to init private filter chains util: new functions to support adding individual firewall rollback commands util: implement rollback rule autocreation for iptables commands network: turn on auto-rollback for the rules added for virtual networks util: add name attribute to virFirewall util: new function virFirewallNewFromRollback() util: new functions virFirewallParseXML() and virFirewallFormat() conf: add a virFirewall object to virNetworkObj network: use previously saved list of firewall removal commands network: save network status when firewall rules are reloaded meson: stop looking for iptables/ip6tables/ebtables at build time network: add an nftables backend for network driver's firewall construction tests: test cases for nftables backend network: prefer the nftables backend over iptables spec: require either iptables or nftables if network driver is installed
libvirt.spec.in | 7 +- meson.build | 10 +- meson_options.txt | 1 + po/POTFILES | 3 +- src/conf/virnetworkobj.c | 47 + src/conf/virnetworkobj.h | 11 + src/libvirt_private.syms | 59 +- src/network/bridge_driver.c | 35 +- src/network/bridge_driver_conf.c | 64 + src/network/bridge_driver_conf.h | 3 + src/network/bridge_driver_linux.c | 630 +------ src/network/bridge_driver_nop.c | 6 +- src/network/bridge_driver_platform.h | 6 +- src/network/libvirtd_network.aug | 39 + src/network/meson.build | 36 + src/network/network.conf.in | 28 + src/network/network_iptables.c | 1677 +++++++++++++++++ src/network/network_iptables.h | 30 + src/network/network_nftables.c | 940 +++++++++ src/network/network_nftables.h | 28 + src/network/test_libvirtd_network.aug.in | 5 + src/nwfilter/nwfilter_ebiptables_driver.c | 1004 +++++----- src/util/meson.build | 1 - src/util/virebtables.c | 36 +- src/util/virfirewall.c | 820 ++++++-- src/util/virfirewall.h | 87 +- src/util/viriptables.c | 1072 ----------- src/util/viriptables.h | 155 -- .../{base.args => base.iptables} | 0 tests/networkxml2firewalldata/base.nftables | 256 +++ ...-linux.args => nat-default-linux.iptables} | 0 .../nat-default-linux.nftables | 248 +++ ...pv6-linux.args => nat-ipv6-linux.iptables} | 0 .../nat-ipv6-linux.nftables | 384 ++++ ...rgs => nat-ipv6-masquerade-linux.iptables} | 0 .../nat-ipv6-masquerade-linux.nftables | 456 +++++ ...linux.args => nat-many-ips-linux.iptables} | 0 .../nat-many-ips-linux.nftables | 472 +++++ ...-linux.args => nat-no-dhcp-linux.iptables} | 0 .../nat-no-dhcp-linux.nftables | 384 ++++ ...ftp-linux.args => nat-tftp-linux.iptables} | 0 .../nat-tftp-linux.nftables | 274 +++ ...inux.args => route-default-linux.iptables} | 0 .../route-default-linux.nftables | 162 ++ tests/networkxml2firewalltest.c | 56 +- tests/virfirewalltest.c | 424 ++--- 46 files changed, 7205 insertions(+), 2751 deletions(-) create mode 100644 src/network/libvirtd_network.aug create mode 100644 src/network/network.conf.in create mode 100644 src/network/network_iptables.c create mode 100644 src/network/network_iptables.h create mode 100644 src/network/network_nftables.c create mode 100644 src/network/network_nftables.h create mode 100644 src/network/test_libvirtd_network.aug.in delete mode 100644 src/util/viriptables.c delete mode 100644 src/util/viriptables.h rename tests/networkxml2firewalldata/{base.args => base.iptables} (100%) create mode 100644 tests/networkxml2firewalldata/base.nftables rename tests/networkxml2firewalldata/{nat-default-linux.args => nat-default-linux.iptables} (100%) create mode 100644 tests/networkxml2firewalldata/nat-default-linux.nftables rename tests/networkxml2firewalldata/{nat-ipv6-linux.args => nat-ipv6-linux.iptables} (100%) create mode 100644 tests/networkxml2firewalldata/nat-ipv6-linux.nftables rename tests/networkxml2firewalldata/{nat-ipv6-masquerade-linux.args => nat-ipv6-masquerade-linux.iptables} (100%) create mode 100644 tests/networkxml2firewalldata/nat-ipv6-masquerade-linux.nftables rename tests/networkxml2firewalldata/{nat-many-ips-linux.args => nat-many-ips-linux.iptables} (100%) create mode 100644 tests/networkxml2firewalldata/nat-many-ips-linux.nftables rename tests/networkxml2firewalldata/{nat-no-dhcp-linux.args => nat-no-dhcp-linux.iptables} (100%) create mode 100644 tests/networkxml2firewalldata/nat-no-dhcp-linux.nftables rename tests/networkxml2firewalldata/{nat-tftp-linux.args => nat-tftp-linux.iptables} (100%) create mode 100644 tests/networkxml2firewalldata/nat-tftp-linux.nftables rename tests/networkxml2firewalldata/{route-default-linux.args => route-default-linux.iptables} (100%) create mode 100644 tests/networkxml2firewalldata/route-default-linux.nftables
On Thu, Apr 25, 2024 at 01:38:06AM -0400, Laine Stump wrote:
V2: https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/thread/5RTZ6...
This patch series enables libvirt to use nftables rules rather than iptables *when setting up virtual networks* (it does *not* add nftables support to the nwfilter driver).
I deployed on my machine and restarted virtnetworkd, with nft backend active. I have 2 networks running, and got the following result table ip libvirt { chain INPUT { type filter hook input priority filter; policy accept; counter packets 363 bytes 30801 jump LIBVIRT_INP } chain FORWARD { type filter hook forward priority filter; policy accept; counter packets 1 bytes 76 jump LIBVIRT_FWX counter packets 1 bytes 76 jump LIBVIRT_FWI counter packets 1 bytes 76 jump LIBVIRT_FWO } chain OUTPUT { type filter hook output priority filter; policy accept; counter packets 286 bytes 107221 jump LIBVIRT_OUT } chain LIBVIRT_INP { iifname "virbr0" udp dport 53 counter packets 0 bytes 0 accept iifname "virbr0" tcp dport 53 counter packets 0 bytes 0 accept iifname "virbr0" udp dport 67 counter packets 1 bytes 320 accept iifname "virbr0" tcp dport 67 counter packets 0 bytes 0 accept iifname "virbr1" udp dport 53 counter packets 0 bytes 0 accept iifname "virbr1" tcp dport 53 counter packets 0 bytes 0 accept iifname "virbr1" udp dport 67 counter packets 0 bytes 0 accept iifname "virbr1" tcp dport 67 counter packets 0 bytes 0 accept } chain LIBVIRT_OUT { oifname "virbr0" udp dport 53 counter packets 0 bytes 0 accept oifname "virbr0" tcp dport 53 counter packets 0 bytes 0 accept oifname "virbr0" udp dport 68 counter packets 1 bytes 336 accept oifname "virbr0" tcp dport 68 counter packets 0 bytes 0 accept oifname "virbr1" udp dport 53 counter packets 0 bytes 0 accept oifname "virbr1" tcp dport 53 counter packets 0 bytes 0 accept oifname "virbr1" udp dport 68 counter packets 0 bytes 0 accept oifname "virbr1" tcp dport 68 counter packets 0 bytes 0 accept } chain LIBVIRT_FWO { ip saddr 192.168.122.0/24 iifname "virbr0" counter packets 1 bytes 76 accept iifname "virbr0" counter packets 0 bytes 0 reject ip saddr 192.168.100.0/24 iifname "virbr1" counter packets 0 bytes 0 accept iifname "virbr1" counter packets 0 bytes 0 reject } chain LIBVIRT_FWI { oifname "virbr0" ip daddr 192.168.122.0/24 ct state established,related counter packets 0 bytes 0 accept oifname "virbr0" counter packets 0 bytes 0 reject oifname "virbr1" ip daddr 192.168.100.0/24 ct state established,related counter packets 0 bytes 0 accept oifname "virbr1" counter packets 0 bytes 0 reject } chain LIBVIRT_FWX { iifname "virbr0" oifname "virbr0" counter packets 0 bytes 0 accept iifname "virbr1" oifname "virbr1" counter packets 0 bytes 0 accept } chain POSTROUTING { type nat hook postrouting priority srcnat; policy accept; counter packets 2 bytes 136 jump LIBVIRT_PRT } chain LIBVIRT_PRT { ip saddr 192.168.122.0/24 ip daddr 224.0.0.0/24 counter packets 0 bytes 0 return ip saddr 192.168.122.0/24 ip daddr 255.255.255.255 counter packets 0 bytes 0 return meta l4proto tcp ip saddr 192.168.122.0/24 ip daddr != 192.168.122.0/24 counter packets 0 bytes 0 masquerade to :1024-65535 meta l4proto udp ip saddr 192.168.122.0/24 ip daddr != 192.168.122.0/24 counter packets 1 bytes 76 masquerade to :1024-65535 ip saddr 192.168.122.0/24 ip daddr != 192.168.122.0/24 counter packets 0 bytes 0 masquerade ip saddr 192.168.100.0/24 ip daddr 224.0.0.0/24 counter packets 0 bytes 0 return ip saddr 192.168.100.0/24 ip daddr 255.255.255.255 counter packets 0 bytes 0 return meta l4proto tcp ip saddr 192.168.100.0/24 ip daddr != 192.168.100.0/24 counter packets 0 bytes 0 masquerade to :1024-65535 meta l4proto udp ip saddr 192.168.100.0/24 ip daddr != 192.168.100.0/24 counter packets 0 bytes 0 masquerade to :1024-65535 ip saddr 192.168.100.0/24 ip daddr != 192.168.100.0/24 counter packets 0 bytes 0 masquerade } } I also got some 'ip6' rules, but I'll omit that, since my points will be identical for both. I compared these rules, against the nft rules created by the iptables compat shim. They were identical, aside from the expected difference with checksum rules, so that's good. The main thought I have is around the chain structure and naming. We have INPUT -> LIBVIRT_INP OUTPUT -> LIBVIRT_OUT FORWARD -> LIBVIRT_FWX -> LIBVIRT_FWI -> LIBVIRT_FWO POSTROUTING -> LIBVIRT_PRT we introduced the top level "LIBVIRT_nnn" chains in the iptables world to cleanly separate ourselves from other users of the top level chains. In the nft world though, this use case is already handled, because we are namespaced in the 'libvirt' table instead. So aside from the FORWARD case, our extra LIBVIRT_nn chains are redundant, and the naming prefix is redundant too. Second observation is that we're not limited to short chain names in the nft world, and uppercase is not a common convention, just a hangover from iptables world. If we consider what each chain is used for * LIBVIRT_INPUT - incoming dnsmasq DHCP/DNS to the host * LIBVIRT_OUTPUT - outgoing dnsmasq DHCP/DNS from the host * LIBVIRT_FWX - crossing traffic between guests on a network * LIBVIRT_FWI - incoming traffic to guests * LIBVIRT_FWO - outgoing traffic from guests * LIBVIRT_PRT - outgoing NAT from guest Then I think we can change names thus: input -> host_input output -> host_output forward -> guest_cross -> guest_input -> guest_output postrouting -> guest_nat so the names better reflect the purpose of each chain. In theory we could eliminate the 'input', 'output' and 'postrouting' top level chains, since they only have 1 rule in them. We can't eliminate the 'forward' chain though, as we need explicit ordernig of traversal for the 3 chains it links to. So on balance, its OK to keep them all I guess. So in the end i'm only really asking for some chain renaming. Oh, actually one final thing. We called the tables 'libvirt'. We have 2 possible users of nft - virtnetworkd and virnwfilterd. I see no reason for them to use the same table. Cleanly separating them would be nice, given they're totally indepedent daemons. IOW, change the table names from 'libvirt' to 'libvirt_network'. Thus in future we can also have 'libvirt_nwfilter' tables. With regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|
On Thu, Apr 25, 2024 at 06:22:33PM +0100, Daniel P. Berrangé wrote:
On Thu, Apr 25, 2024 at 01:38:06AM -0400, Laine Stump wrote:
V2: https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/thread/5RTZ6...
This patch series enables libvirt to use nftables rules rather than iptables *when setting up virtual networks* (it does *not* add nftables support to the nwfilter driver).
I deployed on my machine and restarted virtnetworkd, with nft backend active. I have 2 networks running, and got the following result
table ip libvirt { chain INPUT { type filter hook input priority filter; policy accept; counter packets 363 bytes 30801 jump LIBVIRT_INP }
chain FORWARD { type filter hook forward priority filter; policy accept; counter packets 1 bytes 76 jump LIBVIRT_FWX counter packets 1 bytes 76 jump LIBVIRT_FWI counter packets 1 bytes 76 jump LIBVIRT_FWO }
chain OUTPUT { type filter hook output priority filter; policy accept; counter packets 286 bytes 107221 jump LIBVIRT_OUT }
chain LIBVIRT_INP { iifname "virbr0" udp dport 53 counter packets 0 bytes 0 accept iifname "virbr0" tcp dport 53 counter packets 0 bytes 0 accept iifname "virbr0" udp dport 67 counter packets 1 bytes 320 accept iifname "virbr0" tcp dport 67 counter packets 0 bytes 0 accept iifname "virbr1" udp dport 53 counter packets 0 bytes 0 accept iifname "virbr1" tcp dport 53 counter packets 0 bytes 0 accept iifname "virbr1" udp dport 67 counter packets 0 bytes 0 accept iifname "virbr1" tcp dport 67 counter packets 0 bytes 0 accept }
chain LIBVIRT_OUT { oifname "virbr0" udp dport 53 counter packets 0 bytes 0 accept oifname "virbr0" tcp dport 53 counter packets 0 bytes 0 accept oifname "virbr0" udp dport 68 counter packets 1 bytes 336 accept oifname "virbr0" tcp dport 68 counter packets 0 bytes 0 accept oifname "virbr1" udp dport 53 counter packets 0 bytes 0 accept oifname "virbr1" tcp dport 53 counter packets 0 bytes 0 accept oifname "virbr1" udp dport 68 counter packets 0 bytes 0 accept oifname "virbr1" tcp dport 68 counter packets 0 bytes 0 accept }
I'm wondering if these DHCP and DNS rules are in fact pointless. In iptables, there's 1 set of global tables, and other firewall tools or sysadmin might have put a DENY/REJECT that catches DHCP/DNS. We inserted libvirt rules at the head of the tables, so we can then explicitly ACCEPT DHCP/DNS, even if later rules would deny them. So the LIBVIRT_INP/LIBVIRT_OUT rules are useful in the context of iptables. In nftables, there are arbitrary many tables, and a packet needs to be allowed by *all* the tables, to continue its flow. If a non-libvirt tables has put in a DENY/REJECT that catches DHCP/DNS, then no matter what rules we put in the 'libvirt' tables, we can never undo that DENY/REJECT. So these LIBVIRT_INP/LIBVIRT_OUT rules are entirely pointless unless the 'libvirt' table had later rules that could be DENY/REJECTing DHCP/DNS. We don't today. The only way I see these DHCP/DNS rules being useful, is if the LIBVIRT_INP chain had a default 'deny' rule for 'virbr0', to block the guest from all access to the host. That would to some extent overlap with a general host firewall tool, but there might not be one. Currently our "isolated" config still allows guests to access the host, just won't route off host. I guess any of the forward modes could conceptually have a "deny host" access rule. Still, even if we implemented this "deny host" concept, we still don't need to add these DHCP/DNS rules to LIBVIRT_INP and LIBVIRT_OUT, unless 'deny host' is actually active. IOW, I think we should delete (or comment out) all the DHCP/DNS rules from your nftables impl currently.
chain LIBVIRT_FWO { ip saddr 192.168.122.0/24 iifname "virbr0" counter packets 1 bytes 76 accept iifname "virbr0" counter packets 0 bytes 0 reject ip saddr 192.168.100.0/24 iifname "virbr1" counter packets 0 bytes 0 accept iifname "virbr1" counter packets 0 bytes 0 reject }
chain LIBVIRT_FWI { oifname "virbr0" ip daddr 192.168.122.0/24 ct state established,related counter packets 0 bytes 0 accept oifname "virbr0" counter packets 0 bytes 0 reject oifname "virbr1" ip daddr 192.168.100.0/24 ct state established,related counter packets 0 bytes 0 accept oifname "virbr1" counter packets 0 bytes 0 reject }
chain LIBVIRT_FWX { iifname "virbr0" oifname "virbr0" counter packets 0 bytes 0 accept iifname "virbr1" oifname "virbr1" counter packets 0 bytes 0 accept }
chain POSTROUTING { type nat hook postrouting priority srcnat; policy accept; counter packets 2 bytes 136 jump LIBVIRT_PRT }
chain LIBVIRT_PRT { ip saddr 192.168.122.0/24 ip daddr 224.0.0.0/24 counter packets 0 bytes 0 return ip saddr 192.168.122.0/24 ip daddr 255.255.255.255 counter packets 0 bytes 0 return meta l4proto tcp ip saddr 192.168.122.0/24 ip daddr != 192.168.122.0/24 counter packets 0 bytes 0 masquerade to :1024-65535 meta l4proto udp ip saddr 192.168.122.0/24 ip daddr != 192.168.122.0/24 counter packets 1 bytes 76 masquerade to :1024-65535 ip saddr 192.168.122.0/24 ip daddr != 192.168.122.0/24 counter packets 0 bytes 0 masquerade ip saddr 192.168.100.0/24 ip daddr 224.0.0.0/24 counter packets 0 bytes 0 return ip saddr 192.168.100.0/24 ip daddr 255.255.255.255 counter packets 0 bytes 0 return meta l4proto tcp ip saddr 192.168.100.0/24 ip daddr != 192.168.100.0/24 counter packets 0 bytes 0 masquerade to :1024-65535 meta l4proto udp ip saddr 192.168.100.0/24 ip daddr != 192.168.100.0/24 counter packets 0 bytes 0 masquerade to :1024-65535 ip saddr 192.168.100.0/24 ip daddr != 192.168.100.0/24 counter packets 0 bytes 0 masquerade } }
With regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|
On 4/26/24 6:24 AM, Daniel P. Berrangé wrote:
On Thu, Apr 25, 2024 at 06:22:33PM +0100, Daniel P. Berrangé wrote:
On Thu, Apr 25, 2024 at 01:38:06AM -0400, Laine Stump wrote:
V2: https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/thread/5RTZ6...
This patch series enables libvirt to use nftables rules rather than iptables *when setting up virtual networks* (it does *not* add nftables support to the nwfilter driver).
I deployed on my machine and restarted virtnetworkd, with nft backend active. I have 2 networks running, and got the following result
table ip libvirt { chain INPUT { type filter hook input priority filter; policy accept; counter packets 363 bytes 30801 jump LIBVIRT_INP }
chain FORWARD { type filter hook forward priority filter; policy accept; counter packets 1 bytes 76 jump LIBVIRT_FWX counter packets 1 bytes 76 jump LIBVIRT_FWI counter packets 1 bytes 76 jump LIBVIRT_FWO }
chain OUTPUT { type filter hook output priority filter; policy accept; counter packets 286 bytes 107221 jump LIBVIRT_OUT }
chain LIBVIRT_INP { iifname "virbr0" udp dport 53 counter packets 0 bytes 0 accept iifname "virbr0" tcp dport 53 counter packets 0 bytes 0 accept iifname "virbr0" udp dport 67 counter packets 1 bytes 320 accept iifname "virbr0" tcp dport 67 counter packets 0 bytes 0 accept iifname "virbr1" udp dport 53 counter packets 0 bytes 0 accept iifname "virbr1" tcp dport 53 counter packets 0 bytes 0 accept iifname "virbr1" udp dport 67 counter packets 0 bytes 0 accept iifname "virbr1" tcp dport 67 counter packets 0 bytes 0 accept }
chain LIBVIRT_OUT { oifname "virbr0" udp dport 53 counter packets 0 bytes 0 accept oifname "virbr0" tcp dport 53 counter packets 0 bytes 0 accept oifname "virbr0" udp dport 68 counter packets 1 bytes 336 accept oifname "virbr0" tcp dport 68 counter packets 0 bytes 0 accept oifname "virbr1" udp dport 53 counter packets 0 bytes 0 accept oifname "virbr1" tcp dport 53 counter packets 0 bytes 0 accept oifname "virbr1" udp dport 68 counter packets 0 bytes 0 accept oifname "virbr1" tcp dport 68 counter packets 0 bytes 0 accept }
I'm wondering if these DHCP and DNS rules are in fact pointless.
In iptables, there's 1 set of global tables, and other firewall tools or sysadmin might have put a DENY/REJECT that catches DHCP/DNS. We inserted libvirt rules at the head of the tables, so we can then explicitly ACCEPT DHCP/DNS, even if later rules would deny them. So the LIBVIRT_INP/LIBVIRT_OUT rules are useful in the context of iptables.
In nftables, there are arbitrary many tables, and a packet needs to be allowed by *all* the tables, to continue its flow.
If a non-libvirt tables has put in a DENY/REJECT that catches DHCP/DNS, then no matter what rules we put in the 'libvirt' tables, we can never undo that DENY/REJECT.
So these LIBVIRT_INP/LIBVIRT_OUT rules are entirely pointless unless the 'libvirt' table had later rules that could be DENY/REJECTing DHCP/DNS. We don't today.
The only way I see these DHCP/DNS rules being useful, is if the LIBVIRT_INP chain had a default 'deny' rule for 'virbr0', to block the guest from all access to the host. That would to some extent overlap with a general host firewall tool, but there might not be one.
Currently our "isolated" config still allows guests to access the host, just won't route off host. I guess any of the forward modes could conceptually have a "deny host" access rule.
Still, even if we implemented this "deny host" concept, we still don't need to add these DHCP/DNS rules to LIBVIRT_INP and LIBVIRT_OUT, unless 'deny host' is actually active.
IOW, I think we should delete (or comment out) all the DHCP/DNS rules from your nftables impl currently.
This all makes sense. I'll try it out early next week along with the changes to table/chain naming you suggested yesterday. (I would say "this weekend", but it's springtime, which means "end of year" parties are happening everywhere, and we have 3 of them we have to go to just this weekend :-/)
On 4/25/24 1:22 PM, Daniel P. Berrangé wrote:
On Thu, Apr 25, 2024 at 01:38:06AM -0400, Laine Stump wrote:
V2: https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/thread/5RTZ6...
This patch series enables libvirt to use nftables rules rather than iptables *when setting up virtual networks* (it does *not* add nftables support to the nwfilter driver).
I deployed on my machine and restarted virtnetworkd, with nft backend active. I have 2 networks running, and got the following result
[...]
I compared these rules, against the nft rules created by the iptables compat shim. They were identical, aside from the expected difference with checksum rules, so that's good.
It's good to know that the result is reproducible, and that I apparently didn't miss anything.
The main thought I have is around the chain structure and naming.
[...]
If we consider what each chain is used for
* LIBVIRT_INPUT - incoming dnsmasq DHCP/DNS to the host * LIBVIRT_OUTPUT - outgoing dnsmasq DHCP/DNS from the host * LIBVIRT_FWX - crossing traffic between guests on a network * LIBVIRT_FWI - incoming traffic to guests * LIBVIRT_FWO - outgoing traffic from guests * LIBVIRT_PRT - outgoing NAT from guest
Then I think we can change names thus:
input -> host_input output -> host_output forward -> guest_cross -> guest_input -> guest_output postrouting -> guest_nat
so the names better reflect the purpose of each chain.
In theory we could eliminate the 'input', 'output' and 'postrouting' top level chains, since they only have 1 rule in them. We can't eliminate the 'forward' chain though, as we need explicit ordernig of traversal for the 3 chains it links to. So on balance, its OK to keep them all I guess.
So in the end i'm only really asking for some chain renaming.
Sure - readability always gets extra points, and now that we've established a working baseline that's identical to previous we can modify with abandon :-)
Oh, actually one final thing. We called the tables 'libvirt'.
We have 2 possible users of nft - virtnetworkd and virnwfilterd. I see no reason for them to use the same table. Cleanly separating them would be nice, given they're totally indepedent daemons.
IOW, change the table names from 'libvirt' to 'libvirt_network'.
Thus in future we can also have 'libvirt_nwfilter' tables.
I hadn't thought of that, but it makes sense. I'm trying to think of a way where it would be an advantage to have both use the same table, and (without some serious active cooperation between the two drivers) I can't come up with anything. (and anyway, if we later decide that we want both to be in the same table we can easily change it, and reloading virtnetworkd will create the new table, remove the rules from the old table, and add them in the new table (ie. it will be completely painless for the user) I think I'll do this (and the change to remove the DNS/DHCP rules) as separate patches rather than squasing them into the initial patch for the nft backend. That way it will be obvious from git history what's different in the rules, and will be easier to revert in case we later find some reason that requires that (seems doubtful, but just in case)
participants (2)
-
Daniel P. Berrangé -
Laine Stump