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38 lines
1.2 KiB
C
38 lines
1.2 KiB
C
/* Enable full ICMP errors on a socket.
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Copyright (C) 2019-2023 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <netinet/in.h>
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#include <sys/socket.h>
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int
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__res_enable_icmp (int family, int fd)
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{
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int one = 1;
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switch (family)
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{
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case AF_INET:
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return __setsockopt (fd, SOL_IP, IP_RECVERR, &one, sizeof (one));
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case AF_INET6:
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return __setsockopt (fd, SOL_IPV6, IPV6_RECVERR, &one, sizeof (one));
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default:
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__set_errno (EAFNOSUPPORT);
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return -1;
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}
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}
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