From b6ab06cef4670e02756bcdd4d2c33a49369a4346 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Wed, 14 Dec 2005 08:43:25 +0000 Subject: 2005-12-13 Ulrich Drepper --- inet/check_pf.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 inet/check_pf.c (limited to 'inet') diff --git a/inet/check_pf.c b/inet/check_pf.c new file mode 100644 index 0000000000..5d98c98aff --- /dev/null +++ b/inet/check_pf.c @@ -0,0 +1,50 @@ +/* Determine protocol families for which interfaces exist. Generic version. + Copyright (C) 2003 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 +#include + + +void +attribute_hidden +__check_pf (bool *seen_ipv4, bool *seen_ipv6) +{ + /* 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); +} -- cgit v1.2.3