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/* 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 <features.h>
#include <ifaddrs.h>
#include <netdb.h>
void
attribute_hidden
__check_pf (bool *seen_ipv4, bool *seen_ipv6)
{
*seen_ipv4 = false;
*seen_ipv6 = false;
#if __UCLIBC_SUPPORT_AI_ADDRCONFIG__
{
/* Get the interface list via getifaddrs. */
struct ifaddrs *ifa = NULL;
struct ifaddrs *runp;
if (getifaddrs (&ifa) != 0)
{
/* We cannot determine what interfaces are available. Be
optimistic. */
*seen_ipv4 = true;
#if __UCLIBC_HAS_IPV6__
*seen_ipv6 = true;
#endif /* __UCLIBC_HAS_IPV6__ */
return;
}
for (runp = ifa; runp != NULL; runp = runp->ifa_next)
if (runp->ifa_addr->sa_family == PF_INET)
*seen_ipv4 = true;
#if __UCLIBC_HAS_IPV6__
else if (runp->ifa_addr->sa_family == PF_INET6)
*seen_ipv6 = true;
#endif /* __UCLIBC_HAS_IPV6__ */
(void) freeifaddrs (ifa);
}
#else
/* AI_ADDRCONFIG is disabled, assume both ipv4 and ipv6 available. */
*seen_ipv4 = true;
#if __UCLIBC_HAS_IPV6__
*seen_ipv6 = true;
#endif /* __UCLIBC_HAS_IPV6__ */
#endif /* __UCLIBC_SUPPORT_AI_ADDRCONFIG__ */
}
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