1/* Enable full ICMP errors on a socket.
2 Copyright (C) 2019-2021 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include <netinet/in.h>
21#include <sys/socket.h>
22
23int
24__res_enable_icmp (int family, int fd)
25{
26 int one = 1;
27 switch (family)
28 {
29 case AF_INET:
30 return setsockopt (fd, SOL_IP, IP_RECVERR, &one, sizeof (one));
31 case AF_INET6:
32 return setsockopt (fd, SOL_IPV6, IPV6_RECVERR, &one, sizeof (one));
33 default:
34 __set_errno (EAFNOSUPPORT);
35 return -1;
36 }
37}
38