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72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
/* Determine protocol families for which interfaces exist. Generic version.
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Copyright (C) 2003-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <ifaddrs.h>
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#include <netdb.h>
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#include <stdint.h>
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void
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attribute_hidden
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__check_pf (bool *seen_ipv4, bool *seen_ipv6,
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struct in6addrinfo **in6ai, size_t *in6ailen)
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{
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/* By default we have no way to determine information about
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deprecated and temporary addresses. */
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*in6ai = NULL;
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*in6ailen = 0;
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/* Get the interface list via getifaddrs. */
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struct ifaddrs *ifa = NULL;
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if (__getifaddrs (&ifa) != 0)
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{
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/* We cannot determine what interfaces are available. Be
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pessimistic. */
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*seen_ipv4 = true;
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*seen_ipv6 = true;
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return;
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}
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*seen_ipv4 = false;
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*seen_ipv6 = false;
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struct ifaddrs *runp;
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for (runp = ifa; runp != NULL; runp = runp->ifa_next)
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if (runp->ifa_addr->sa_family == PF_INET)
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*seen_ipv4 = true;
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else if (runp->ifa_addr->sa_family == PF_INET6)
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*seen_ipv6 = true;
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(void) __freeifaddrs (ifa);
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}
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void
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__free_in6ai (struct in6addrinfo *in6ai)
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{
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/* Nothing to do. */
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}
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#if IS_IN (nscd)
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uint32_t
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__bump_nl_timestamp (void)
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{
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return 0;
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}
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#endif
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