For static-only DHCP, i.e. with no <range> but at least one <host> element within <dhcp> element, we have to add "--dhcp-range IP,static" option to dnsmasq to actually enable the service. Without this option, dnsmasq will not respond to DHCP requests. --- src/network/bridge_driver.c | 26 +++++++++++++++++++++++--- 1 files changed, 23 insertions(+), 3 deletions(-) diff --git a/src/network/bridge_driver.c b/src/network/bridge_driver.c index d6d3068..01d2171 100644 --- a/src/network/bridge_driver.c +++ b/src/network/bridge_driver.c @@ -394,6 +394,16 @@ networkBuildDnsmasqArgv(virNetworkObjPtr network, int nbleases = 0; char *pidfileArg; char buf[1024]; + unsigned int ranges; + + /* + * For static-only DHCP, i.e. with no range but at least one host element, + * we have to add a special --dhcp-range option to enable the service in + * dnsmasq. + */ + ranges = network->def->nranges; + if (!ranges && network->def->nhosts) + ranges = 1; /* * NB, be careful about syntax for dnsmasq options in long format @@ -424,11 +434,11 @@ networkBuildDnsmasqArgv(virNetworkObjPtr network, /*2 + *//* --interface virbr0 */ 2 + /* --except-interface lo */ 2 + /* --listen-address 10.0.0.1 */ - (2 * network->def->nranges) + /* --dhcp-range 10.0.0.2,10.0.0.254 */ + (2 * ranges) + /* --dhcp-range 10.0.0.2,10.0.0.254 */ /* --dhcp-lease-max=xxx if needed */ (network->def->nranges ? 1 : 0) + /* --dhcp-no-override if needed */ - (network->def->nranges ? 1 : 0) + + (ranges ? 1 : 0) + /* --dhcp-hostsfile=/var/lib/dnsmasq/$NAME.hostsfile */ (network->def->nhosts > 0 ? 1 : 0) + /* --enable-tftp --tftp-root /srv/tftp */ @@ -496,12 +506,22 @@ networkBuildDnsmasqArgv(virNetworkObjPtr network, nbleases += network->def->ranges[r].size; } + if (!network->def->nranges && network->def->nhosts) { + snprintf(buf, sizeof(buf), "%s,static", + network->def->ipAddress); + + APPEND_ARG(*argv, i++, "--dhcp-range"); + APPEND_ARG(*argv, i++, buf); + } + if (network->def->nranges > 0) { snprintf(buf, sizeof(buf), "--dhcp-lease-max=%d", nbleases); APPEND_ARG(*argv, i++, buf); - APPEND_ARG(*argv, i++, "--dhcp-no-override"); } + if (ranges) + APPEND_ARG(*argv, i++, "--dhcp-no-override"); + if (network->def->nhosts > 0) { dnsmasqContext *dctx = dnsmasqContextNew(network->def->name, DNSMASQ_STATE_DIR); char *hostsfileArg;