diff options
Diffstat (limited to 'resolv/res_enable_icmp.c')
-rw-r--r-- | resolv/res_enable_icmp.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/resolv/res_enable_icmp.c b/resolv/res_enable_icmp.c new file mode 100644 index 0000000000..bdc9220f08 --- /dev/null +++ b/resolv/res_enable_icmp.c @@ -0,0 +1,37 @@ +/* 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; + } +} |