summary refs log tree commit diff
path: root/inet/check_pf.c
diff options
context:
space:
mode:
authorJakub Jelinek <jakub@redhat.com>2007-07-12 18:26:36 +0000
committerJakub Jelinek <jakub@redhat.com>2007-07-12 18:26:36 +0000
commit0ecb606cb6cf65de1d9fc8a919bceb4be476c602 (patch)
tree2ea1f8305970753e4a657acb2ccc15ca3eec8e2c /inet/check_pf.c
parent7d58530341304d403a6626d7f7a1913165fe2f32 (diff)
downloadglibc-0ecb606cb6cf65de1d9fc8a919bceb4be476c602.tar.gz
glibc-0ecb606cb6cf65de1d9fc8a919bceb4be476c602.tar.xz
glibc-0ecb606cb6cf65de1d9fc8a919bceb4be476c602.zip
2.5-18.1
Diffstat (limited to 'inet/check_pf.c')
-rw-r--r--inet/check_pf.c56
1 files changed, 56 insertions, 0 deletions
diff --git a/inet/check_pf.c b/inet/check_pf.c
new file mode 100644
index 0000000000..b015432659
--- /dev/null
+++ b/inet/check_pf.c
@@ -0,0 +1,56 @@
+/* Determine protocol families for which interfaces exist.  Generic version.
+   Copyright (C) 2003, 2006 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C 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.
+
+   The GNU C 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 the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <ifaddrs.h>
+#include <netdb.h>
+
+
+void
+attribute_hidden
+__check_pf (bool *seen_ipv4, bool *seen_ipv6,
+	    struct in6addrinfo **in6ai, size_t *in6ailen)
+{
+  /* By default we have no way to determine information about
+     deprecated and temporary addresses.  */
+  *in6ai = NULL;
+  *in6ailen = 0;
+
+  /* Get the interface list via getifaddrs.  */
+  struct ifaddrs *ifa = NULL;
+  if (getifaddrs (&ifa) != 0)
+    {
+      /* We cannot determine what interfaces are available.  Be
+	 pessimistic.  */
+      *seen_ipv4 = true;
+      *seen_ipv6 = true;
+      return;
+    }
+
+  *seen_ipv4 = false;
+  *seen_ipv6 = false;
+
+  struct ifaddrs *runp;
+  for (runp = ifa; runp != NULL; runp = runp->ifa_next)
+    if (runp->ifa_addr->sa_family == PF_INET)
+      *seen_ipv4 = true;
+    else if (runp->ifa_addr->sa_family == PF_INET6)
+      *seen_ipv6 = true;
+
+  (void) freeifaddrs (ifa);
+}