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/* Enable full ICMP errors on a socket.
Copyright (C) 2019-2021 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, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <netinet/in.h>
#include <sys/socket.h>
int
__res_enable_icmp (int family, int fd)
{
int one = 1;
switch (family)
{
case AF_INET:
return __setsockopt (fd, SOL_IP, IP_RECVERR, &one, sizeof (one));
case AF_INET6:
return __setsockopt (fd, SOL_IPV6, IPV6_RECVERR, &one, sizeof (one));
default:
__set_errno (EAFNOSUPPORT);
return -1;
}
}
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