2:43 a.m.
* tools/nss/libvirt_nss.[ch]: add BSD-comptabile wrappers and
register via the nss_module_register() interface
* m4/virt-nss.m4: add checks if we're building NSS for FreeBSD
* tools/Makefile.am: handle target library name differences, as
Linux needs libnss_libvirt.so.2 and FreeBSD needs
nss_libvirt.so.1. Also, different syms files have to be used
as Linux needs to export all the methods while FreeBSD
only needs to have nss_module_register()
* libvirt_nss_bsd.syms: FreeBSD syms file
---
m4/virt-nss.m4 | 12 +++-
tools/Makefile.am | 16 ++++-
tools/nss/libvirt_nss.c | 140 +++++++++++++++++++++++++++++++++++++++--
tools/nss/libvirt_nss.h | 9 +++
tools/nss/libvirt_nss_bsd.syms | 9 +++
5 files changed, 179 insertions(+), 7 deletions(-)
create mode 100644 tools/nss/libvirt_nss_bsd.syms
diff --git a/m4/virt-nss.m4 b/m4/virt-nss.m4
index 3fa4ad3..a8ed8b9 100644
--- a/m4/virt-nss.m4
+++ b/m4/virt-nss.m4
@@ -23,6 +23,7 @@ AC_DEFUN([LIBVIRT_CHECK_NSS],[
[enable Name Servie Switch plugin for resolving guest IP addresses])],
[], [with_nss_plugin=check])
+ bsd_nss=no
fail=0
if test "x$with_nss_plugin" != "xno" ; then
AC_CHECK_HEADERS([nss.h], [
@@ -39,11 +40,20 @@ AC_DEFUN([LIBVIRT_CHECK_NSS],[
if test "x$with_nss_plugin" = "xyes" ; then
AC_DEFINE_UNQUOTED([NSS], 1, [whether nss plugin is enabled])
+
+ AC_CHECK_TYPES([ns_mtab, nss_module_unregister_fn],
+ [AC_DEFINE([HAVE_BSD_NSS],
+ [1],
+ [whether using BSD style NSS])
+ bsd_nss=yes
+ ],
+ [],
+ [#include <nsswitch.h>])
fi
fi
AM_CONDITIONAL(WITH_NSS, [test "x$with_nss_plugin" = "xyes"])
-
+ AM_CONDITIONAL(WITH_BSD_NSS, [test "x$bsd_nss" = "xyes"])
])
AC_DEFUN([LIBVIRT_RESULT_NSS],[
diff --git a/tools/Makefile.am b/tools/Makefile.am
index 4320040..6005b8b 100644
--- a/tools/Makefile.am
+++ b/tools/Makefile.am
@@ -417,8 +417,22 @@ CLEANFILES += wireshark/src/plugin.c
endif WITH_WIRESHARK_DISSECTOR
+if WITH_BSD_NSS
+LIBVIRT_NSS_SYMBOL_FILE = \
+ $(srcdir)/nss/libvirt_nss_bsd.syms
+NSS_SO_VER = 1
+
+install-exec-hook:
+ cd $(DESTDIR)$(libdir) && \
+ $(LN_S) libnss_libvirt.so.$(NSS_SO_VER) nss_libvirt.so.$(NSS_SO_VER)
+
+uninstall-local:
+ rm $(DESTDIR)$(libdir)/libnss_libvirt.so.$(NSS_SO_VER)
+else ! WITH_BSD_NSS
LIBVIRT_NSS_SYMBOL_FILE = \
$(srcdir)/nss/libvirt_nss.syms
+NSS_SO_VER = 2
+endif ! WITH_BSD_NSS
LIBVIRT_NSS_SOURCES = \
nss/libvirt_nss.c \
@@ -449,7 +463,7 @@ nss_libnss_libvirt_la_LDFLAGS = \
-export-dynamic \
-avoid-version \
-shared \
- -shrext .so.2
+ -shrext .so.$(NSS_SO_VER)
nss_libnss_libvirt_la_LIBADD = \
nss/libnss_libvirt_impl.la
diff --git a/tools/nss/libvirt_nss.c b/tools/nss/libvirt_nss.c
index 218c62a..0ff1348 100644
--- a/tools/nss/libvirt_nss.c
+++ b/tools/nss/libvirt_nss.c
@@ -1,5 +1,4 @@
/*
- * libvirt_nss: Name Service Switch plugin
*
* The aim is to enable users and applications to translate
* domain names into IP addresses. However, this is currently
@@ -29,11 +28,16 @@
#include "libvirt_nss.h"
+#include <netinet/in.h>
#include <resolv.h>
#include <sys/types.h>
#include <dirent.h>
#include <arpa/inet.h>
+#if defined(HAVE_BSD_NSS)
+# include <nsswitch.h>
+#endif
+
#include "virlease.h"
#include "viralloc.h"
#include "virfile.h"
@@ -65,7 +69,7 @@ do { \
#define LEASEDIR LOCALSTATEDIR "/lib/libvirt/dnsmasq/"
-#define ALIGN(x) (((x) + __SIZEOF_POINTER__ - 1) & ~(__SIZEOF_POINTER__ - 1))
+#define LIBVIRT_ALIGN(x) (((x) + __SIZEOF_POINTER__ - 1) & ~(__SIZEOF_POINTER__ -
1))
#define FAMILY_ADDRESS_SIZE(family) ((family) == AF_INET6 ? 16 : 4)
typedef struct {
@@ -256,7 +260,7 @@ static inline void *
move_and_align(void *buf, size_t len, size_t *idx)
{
char *buffer = buf;
- size_t move = ALIGN(len);
+ size_t move = LIBVIRT_ALIGN(len);
if (!idx)
return buffer + move;
@@ -321,7 +325,7 @@ _nss_libvirt_gethostbyname3_r(const char *name, int af, struct hostent
*result,
* b) alias
* c) addresses
* d) NULL stem */
- need = ALIGN(nameLen + 1) + naddr * ALIGN(alen) + (naddr + 2) * sizeof(char*);
+ need = LIBVIRT_ALIGN(nameLen + 1) + naddr * LIBVIRT_ALIGN(alen) + (naddr + 2) *
sizeof(char*);
if (buflen < need) {
*errnop = ENOMEM;
@@ -383,6 +387,7 @@ _nss_libvirt_gethostbyname3_r(const char *name, int af, struct hostent
*result,
return ret;
}
+#ifdef HAVE_STRUCT_GAIH_ADDRTUPLE
enum nss_status
_nss_libvirt_gethostbyname4_r(const char *name, struct gaih_addrtuple **pat,
char *buffer, size_t buflen, int *errnop,
@@ -426,7 +431,7 @@ _nss_libvirt_gethostbyname4_r(const char *name, struct gaih_addrtuple
**pat,
/* We need space for:
* a) name
* b) addresses */
- need = ALIGN(nameLen + 1) + naddr * ALIGN(sizeof(struct gaih_addrtuple));
+ need = LIBVIRT_ALIGN(nameLen + 1) + naddr * LIBVIRT_ALIGN(sizeof(struct
gaih_addrtuple));
if (buflen < need) {
*errnop = ENOMEM;
@@ -474,3 +479,128 @@ _nss_libvirt_gethostbyname4_r(const char *name, struct
gaih_addrtuple **pat,
cleanup:
return ret;
}
+#endif /* HAVE_STRUCT_GAIH_ADDRTUPLE */
+
+#if defined(HAVE_BSD_NSS)
+NSS_METHOD_PROTOTYPE(_nss_compat_getaddrinfo);
+NSS_METHOD_PROTOTYPE(_nss_compat_gethostbyname2_r);
+
+ns_mtab methods[] = {
+ { NSDB_HOSTS, "getaddrinfo", _nss_compat_getaddrinfo, NULL },
+ { NSDB_HOSTS, "gethostbyname", _nss_compat_gethostbyname2_r, NULL },
+ { NSDB_HOSTS, "gethostbyname2_r", _nss_compat_gethostbyname2_r, NULL },
+};
+
+static void
+aiforaf(const char *name, int af, struct addrinfo *pai, struct addrinfo **aip)
+{
+ int ret;
+ struct hostent resolved;
+ char buf[1024] = { 0 };
+ int err, herr;
+ struct addrinfo hints, *res0, *res;
+ char **addrList;
+
+ if ((ret = _nss_libvirt_gethostbyname2_r(name, af, &resolved,
+ buf, sizeof(buf),
+ &err, &herr)) != NS_SUCCESS)
+ return;
+
+ addrList = resolved.h_addr_list;
+ while (*addrList) {
+ virSocketAddr sa;
+ char *ipAddr = NULL;
+ void *address = *addrList;
+
+ memset(&sa, 0, sizeof(sa));
+ if (resolved.h_addrtype == AF_INET) {
+ virSocketAddrSetIPv4AddrNetOrder(&sa, *((uint32_t *) address));
+ } else {
+ virSocketAddrSetIPv6AddrNetOrder(&sa, address);
+ }
+
+ ipAddr = virSocketAddrFormat(&sa);
+
+ hints = *pai;
+ hints.ai_flags = AI_NUMERICHOST;
+ hints.ai_family = af;
+
+ if (getaddrinfo(ipAddr, NULL, &hints, &res0)) {
+ addrList++;
+ continue;
+ }
+
+ for (res = res0; res; res = res->ai_next)
+ res->ai_flags = pai->ai_flags;
+
+ (*aip)->ai_next = res0;
+ while ((*aip)->ai_next)
+ *aip = (*aip)->ai_next;
+
+ addrList++;
+ }
+}
+
+int
+_nss_compat_getaddrinfo(void *retval, void *mdata ATTRIBUTE_UNUSED, va_list ap)
+{
+ struct addrinfo sentinel, *cur, *ai;
+ const char *name;
+
+ name = va_arg(ap, char *);
+ ai = va_arg(ap, struct addrinfo *);
+
+ memset(&sentinel, 0, sizeof(sentinel));
+ cur = &sentinel;
+
+ if ((ai->ai_family == AF_UNSPEC) || (ai->ai_family == AF_INET6))
+ aiforaf(name, AF_INET6, ai, &cur);
+ if ((ai->ai_family == AF_UNSPEC) || (ai->ai_family == AF_INET))
+ aiforaf(name, AF_INET, ai, &cur);
+
+ if (sentinel.ai_next == NULL) {
+ h_errno = HOST_NOT_FOUND;
+ return NS_NOTFOUND;
+ }
+ *((struct addrinfo **)retval) = sentinel.ai_next;
+
+ return NS_SUCCESS;
+}
+
+int
+_nss_compat_gethostbyname2_r(void *retval, void *mdata ATTRIBUTE_UNUSED, va_list ap)
+{
+ int ret;
+
+ const char *name;
+ int af;
+ struct hostent *result;
+ char *buffer;
+ size_t buflen;
+ int *errnop;
+ int *herrnop;
+
+ name = va_arg(ap, const char *);
+ af = va_arg(ap, int);
+ result = va_arg(ap, struct hostent *);
+ buffer = va_arg(ap, char *);
+ buflen = va_arg(ap, size_t);
+ errnop = va_arg(ap, int *);
+ herrnop = va_arg(ap, int *);
+
+ ret = _nss_libvirt_gethostbyname2_r(
+ name, af, result, buffer, buflen, errnop, herrnop);
+ *(struct hostent **)retval = (ret == NS_SUCCESS) ? result : NULL;
+
+ return ret;
+}
+
+ns_mtab*
+nss_module_register(const char *name ATTRIBUTE_UNUSED, unsigned int *size,
+ nss_module_unregister_fn *unregister)
+{
+ *size = sizeof(methods) / sizeof(methods[0]);
+ *unregister = NULL;
+ return methods;
+}
+#endif /* HAVE_BSD_NSS */
diff --git a/tools/nss/libvirt_nss.h b/tools/nss/libvirt_nss.h
index 589c1e6..e025e63 100644
--- a/tools/nss/libvirt_nss.h
+++ b/tools/nss/libvirt_nss.h
@@ -45,8 +45,17 @@ enum nss_status
_nss_libvirt_gethostbyname3_r(const char *name, int af, struct hostent *result,
char *buffer, size_t buflen, int *errnop,
int *herrnop, int32_t *ttlp, char **canonp);
+# ifdef HAVE_STRUCT_GAIH_ADDRTUPLE
enum nss_status
_nss_libvirt_gethostbyname4_r(const char *name, struct gaih_addrtuple **pat,
char *buffer, size_t buflen, int *errnop,
int *herrnop, int32_t *ttlp);
+# endif /* HAVE_STRUCT_GAIH_ADDRTUPLE */
+
+# if defined(HAVE_BSD_NSS)
+ns_mtab*
+nss_module_register(const char *name, unsigned int *size,
+ nss_module_unregister_fn *unregister);
+# endif /* HAVE_BSD_NSS */
+
#endif /* __LIBVIRT_NSS_H__ */
diff --git a/tools/nss/libvirt_nss_bsd.syms b/tools/nss/libvirt_nss_bsd.syms
new file mode 100644
index 0000000..7da3926
--- /dev/null
+++ b/tools/nss/libvirt_nss_bsd.syms
@@ -0,0 +1,9 @@
+#
+# Officially exported symbols.
+#
+
+{
+global:
+ nss_module_register;
+local: *;
+};
--
2.4.6