/* Enable full ICMP errors on a socket.

   Copyright (C) 2019 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

   <http://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;

    }

}