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08504de7 FW |
1 | /* Enable full ICMP errors on a socket. |
2 | Copyright (C) 2019 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 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <errno.h> | |
20 | #include <netinet/in.h> | |
21 | #include <sys/socket.h> | |
22 | ||
23 | int | |
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 | } |