2016-01-05 00:05:18 +08:00
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/* Copyright (C) 2006-2016 Free Software Foundation, Inc.
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[BZ #2693]
* inet/Makefile (routines): Add inet6_opt and inet6_rth.
* inet/Versions (libc, GLIBC_2.5): Add inet6_opt_init,
inet6_opt_append, inet6_opt_finish, inet6_opt_set_val, inet6_opt_next,
inet6_opt_find, inet6_opt_get_val, inet6_rth_space, inet6_rth_init,
inet6_rth_add, inet6_rth_reverse, inet6_rth_segments,
and inet6_rth_getaddr.
* inet/netinet/ip6.h (struct ip6_rthdr0): Make ip6r0_addr a flexible
array.
* inet/netinet/in.h (struct ip6_mtuinfo): Define.
Mark inet6_option_* interfaces as deprecated.
Declare inet6_opt_init, inet6_opt_append, inet6_opt_finish,
inet6_opt_set_val, inet6_opt_next, inet6_opt_find, inet6_opt_get_val,
inet6_rth_space, inet6_rth_init, inet6_rth_add, inet6_rth_reverse,
inet6_rth_segments, and inet6_rth_getaddr.
* inet/inet6_opt.c: New file.
* inet/inet6_rth.c: New file.
* inet/netinet/icmp6.h: Pretty printing.
2006-05-25 12:50:06 +08:00
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2006.
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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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2012-02-10 07:18:22 +08:00
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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[BZ #2693]
* inet/Makefile (routines): Add inet6_opt and inet6_rth.
* inet/Versions (libc, GLIBC_2.5): Add inet6_opt_init,
inet6_opt_append, inet6_opt_finish, inet6_opt_set_val, inet6_opt_next,
inet6_opt_find, inet6_opt_get_val, inet6_rth_space, inet6_rth_init,
inet6_rth_add, inet6_rth_reverse, inet6_rth_segments,
and inet6_rth_getaddr.
* inet/netinet/ip6.h (struct ip6_rthdr0): Make ip6r0_addr a flexible
array.
* inet/netinet/in.h (struct ip6_mtuinfo): Define.
Mark inet6_option_* interfaces as deprecated.
Declare inet6_opt_init, inet6_opt_append, inet6_opt_finish,
inet6_opt_set_val, inet6_opt_next, inet6_opt_find, inet6_opt_get_val,
inet6_rth_space, inet6_rth_init, inet6_rth_add, inet6_rth_reverse,
inet6_rth_segments, and inet6_rth_getaddr.
* inet/inet6_opt.c: New file.
* inet/inet6_rth.c: New file.
* inet/netinet/icmp6.h: Pretty printing.
2006-05-25 12:50:06 +08:00
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#include <string.h>
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#include <netinet/in.h>
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#include <netinet/ip6.h>
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/* RFC 3542, 7.1
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This function returns the number of bytes required to hold a
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Routing header of the specified type containing the specified
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number of segments (addresses). For an IPv6 Type 0 Routing header,
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the number of segments must be between 0 and 127, inclusive. */
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socklen_t
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inet6_rth_space (int type, int segments)
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{
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switch (type)
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{
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case IPV6_RTHDR_TYPE_0:
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if (segments < 0 || segments > 127)
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return 0;
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return sizeof (struct ip6_rthdr0) + segments * sizeof (struct in6_addr);
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}
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return 0;
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}
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/* RFC 3542, 7.2
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This function initializes the buffer pointed to by BP to contain a
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Routing header of the specified type and sets ip6r_len based on the
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segments parameter. */
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void *
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inet6_rth_init (void *bp, socklen_t bp_len, int type, int segments)
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{
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struct ip6_rthdr *rthdr = (struct ip6_rthdr *) bp;
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switch (type)
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{
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case IPV6_RTHDR_TYPE_0:
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/* Make sure the parameters are valid and the buffer is large enough. */
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if (segments < 0 || segments > 127)
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break;
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socklen_t len = (sizeof (struct ip6_rthdr0)
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+ segments * sizeof (struct in6_addr));
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if (len > bp_len)
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break;
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/* Some implementations seem to initialize the whole memory area. */
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memset (bp, '\0', len);
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/* Length in units of 8 octets. */
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rthdr->ip6r_len = segments * sizeof (struct in6_addr) / 8;
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rthdr->ip6r_type = IPV6_RTHDR_TYPE_0;
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return bp;
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}
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return NULL;
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}
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/* RFC 3542, 7.3
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This function adds the IPv6 address pointed to by addr to the end of
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the Routing header being constructed. */
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int
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inet6_rth_add (void *bp, const struct in6_addr *addr)
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{
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struct ip6_rthdr *rthdr = (struct ip6_rthdr *) bp;
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switch (rthdr->ip6r_type)
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{
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struct ip6_rthdr0 *rthdr0;
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case IPV6_RTHDR_TYPE_0:
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rthdr0 = (struct ip6_rthdr0 *) rthdr;
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2009-03-16 03:16:16 +08:00
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if (rthdr0->ip6r0_len * 8 / sizeof (struct in6_addr)
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- rthdr0->ip6r0_segleft < 1)
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return -1;
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[BZ #2693]
* inet/Makefile (routines): Add inet6_opt and inet6_rth.
* inet/Versions (libc, GLIBC_2.5): Add inet6_opt_init,
inet6_opt_append, inet6_opt_finish, inet6_opt_set_val, inet6_opt_next,
inet6_opt_find, inet6_opt_get_val, inet6_rth_space, inet6_rth_init,
inet6_rth_add, inet6_rth_reverse, inet6_rth_segments,
and inet6_rth_getaddr.
* inet/netinet/ip6.h (struct ip6_rthdr0): Make ip6r0_addr a flexible
array.
* inet/netinet/in.h (struct ip6_mtuinfo): Define.
Mark inet6_option_* interfaces as deprecated.
Declare inet6_opt_init, inet6_opt_append, inet6_opt_finish,
inet6_opt_set_val, inet6_opt_next, inet6_opt_find, inet6_opt_get_val,
inet6_rth_space, inet6_rth_init, inet6_rth_add, inet6_rth_reverse,
inet6_rth_segments, and inet6_rth_getaddr.
* inet/inet6_opt.c: New file.
* inet/inet6_rth.c: New file.
* inet/netinet/icmp6.h: Pretty printing.
2006-05-25 12:50:06 +08:00
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memcpy (&rthdr0->ip6r0_addr[rthdr0->ip6r0_segleft++],
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addr, sizeof (struct in6_addr));
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return 0;
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}
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return -1;
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}
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/* RFC 3542, 7.4
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This function takes a Routing header extension header (pointed to by
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the first argument) and writes a new Routing header that sends
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datagrams along the reverse of that route. The function reverses the
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order of the addresses and sets the segleft member in the new Routing
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header to the number of segments. */
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int
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inet6_rth_reverse (const void *in, void *out)
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{
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struct ip6_rthdr *in_rthdr = (struct ip6_rthdr *) in;
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switch (in_rthdr->ip6r_type)
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{
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struct ip6_rthdr0 *in_rthdr0;
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struct ip6_rthdr0 *out_rthdr0;
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case IPV6_RTHDR_TYPE_0:
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in_rthdr0 = (struct ip6_rthdr0 *) in;
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out_rthdr0 = (struct ip6_rthdr0 *) out;
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/* Copy header, not the addresses. The memory regions can overlap. */
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memmove (out_rthdr0, in_rthdr0, sizeof (struct ip6_rthdr0));
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2009-03-16 04:35:02 +08:00
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int total = in_rthdr0->ip6r0_len * 8 / sizeof (struct in6_addr);
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[BZ #2693]
* inet/Makefile (routines): Add inet6_opt and inet6_rth.
* inet/Versions (libc, GLIBC_2.5): Add inet6_opt_init,
inet6_opt_append, inet6_opt_finish, inet6_opt_set_val, inet6_opt_next,
inet6_opt_find, inet6_opt_get_val, inet6_rth_space, inet6_rth_init,
inet6_rth_add, inet6_rth_reverse, inet6_rth_segments,
and inet6_rth_getaddr.
* inet/netinet/ip6.h (struct ip6_rthdr0): Make ip6r0_addr a flexible
array.
* inet/netinet/in.h (struct ip6_mtuinfo): Define.
Mark inet6_option_* interfaces as deprecated.
Declare inet6_opt_init, inet6_opt_append, inet6_opt_finish,
inet6_opt_set_val, inet6_opt_next, inet6_opt_find, inet6_opt_get_val,
inet6_rth_space, inet6_rth_init, inet6_rth_add, inet6_rth_reverse,
inet6_rth_segments, and inet6_rth_getaddr.
* inet/inet6_opt.c: New file.
* inet/inet6_rth.c: New file.
* inet/netinet/icmp6.h: Pretty printing.
2006-05-25 12:50:06 +08:00
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for (int i = 0; i < total / 2; ++i)
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{
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/* Remember, IN_RTHDR0 and OUT_RTHDR0 might overlap. */
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struct in6_addr temp = in_rthdr0->ip6r0_addr[i];
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out_rthdr0->ip6r0_addr[i] = in_rthdr0->ip6r0_addr[total - 1 - i];
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out_rthdr0->ip6r0_addr[total - 1 - i] = temp;
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}
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if (total % 2 != 0 && in != out)
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out_rthdr0->ip6r0_addr[total / 2] = in_rthdr0->ip6r0_addr[total / 2];
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2009-03-16 04:35:02 +08:00
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out_rthdr0->ip6r0_segleft = total;
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[BZ #2693]
* inet/Makefile (routines): Add inet6_opt and inet6_rth.
* inet/Versions (libc, GLIBC_2.5): Add inet6_opt_init,
inet6_opt_append, inet6_opt_finish, inet6_opt_set_val, inet6_opt_next,
inet6_opt_find, inet6_opt_get_val, inet6_rth_space, inet6_rth_init,
inet6_rth_add, inet6_rth_reverse, inet6_rth_segments,
and inet6_rth_getaddr.
* inet/netinet/ip6.h (struct ip6_rthdr0): Make ip6r0_addr a flexible
array.
* inet/netinet/in.h (struct ip6_mtuinfo): Define.
Mark inet6_option_* interfaces as deprecated.
Declare inet6_opt_init, inet6_opt_append, inet6_opt_finish,
inet6_opt_set_val, inet6_opt_next, inet6_opt_find, inet6_opt_get_val,
inet6_rth_space, inet6_rth_init, inet6_rth_add, inet6_rth_reverse,
inet6_rth_segments, and inet6_rth_getaddr.
* inet/inet6_opt.c: New file.
* inet/inet6_rth.c: New file.
* inet/netinet/icmp6.h: Pretty printing.
2006-05-25 12:50:06 +08:00
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return 0;
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}
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return -1;
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}
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/* RFC 3542, 7.5
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This function returns the number of segments (addresses) contained in
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the Routing header described by BP. */
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int
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inet6_rth_segments (const void *bp)
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{
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struct ip6_rthdr *rthdr = (struct ip6_rthdr *) bp;
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switch (rthdr->ip6r_type)
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{
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case IPV6_RTHDR_TYPE_0:
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return rthdr->ip6r_len * 8 / sizeof (struct in6_addr);
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}
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return -1;
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}
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/* RFC 3542, 7.6
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This function returns a pointer to the IPv6 address specified by
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index (which must have a value between 0 and one less than the
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value returned by 'inet6_rth_segments') in the Routing header
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described by BP. */
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struct in6_addr *
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inet6_rth_getaddr (const void *bp, int index)
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{
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struct ip6_rthdr *rthdr = (struct ip6_rthdr *) bp;
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switch (rthdr->ip6r_type)
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{
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struct ip6_rthdr0 *rthdr0;
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case IPV6_RTHDR_TYPE_0:
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rthdr0 = (struct ip6_rthdr0 *) rthdr;
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if (index >= rthdr0->ip6r0_len * 8 / sizeof (struct in6_addr))
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break;
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return &rthdr0->ip6r0_addr[index];
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}
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return NULL;
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}
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