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Diffstat (limited to 'inet/inet6_rth.c')
| -rw-r--r-- | inet/inet6_rth.c | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/inet/inet6_rth.c b/inet/inet6_rth.c deleted file mode 100644 index 15f8240909..0000000000 --- a/inet/inet6_rth.c +++ /dev/null @@ -1,192 +0,0 @@ -/* Copyright (C) 2006 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@redhat.com>, 2006. - - 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, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <string.h> -#include <netinet/in.h> -#include <netinet/ip6.h> - - -/* RFC 3542, 7.1 - - This function returns the number of bytes required to hold a - Routing header of the specified type containing the specified - number of segments (addresses). For an IPv6 Type 0 Routing header, - the number of segments must be between 0 and 127, inclusive. */ -socklen_t -inet6_rth_space (int type, int segments) -{ - switch (type) - { - case IPV6_RTHDR_TYPE_0: - if (segments < 0 || segments > 127) - return 0; - - return sizeof (struct ip6_rthdr0) + segments * sizeof (struct in6_addr); - } - - return 0; -} - - -/* RFC 3542, 7.2 - - This function initializes the buffer pointed to by BP to contain a - Routing header of the specified type and sets ip6r_len based on the - segments parameter. */ -void * -inet6_rth_init (void *bp, socklen_t bp_len, int type, int segments) -{ - struct ip6_rthdr *rthdr = (struct ip6_rthdr *) bp; - - switch (type) - { - case IPV6_RTHDR_TYPE_0: - /* Make sure the parameters are valid and the buffer is large enough. */ - if (segments < 0 || segments > 127) - break; - - socklen_t len = (sizeof (struct ip6_rthdr0) - + segments * sizeof (struct in6_addr)); - if (len > bp_len) - break; - - /* Some implementations seem to initialize the whole memory area. */ - memset (bp, '\0', len); - - /* Length in units of 8 octets. */ - rthdr->ip6r_len = segments * sizeof (struct in6_addr) / 8; - rthdr->ip6r_type = IPV6_RTHDR_TYPE_0; - return bp; - } - - return NULL; -} - - -/* RFC 3542, 7.3 - - This function adds the IPv6 address pointed to by addr to the end of - the Routing header being constructed. */ -int -inet6_rth_add (void *bp, const struct in6_addr *addr) -{ - struct ip6_rthdr *rthdr = (struct ip6_rthdr *) bp; - - switch (rthdr->ip6r_type) - { - struct ip6_rthdr0 *rthdr0; - case IPV6_RTHDR_TYPE_0: - rthdr0 = (struct ip6_rthdr0 *) rthdr; - - memcpy (&rthdr0->ip6r0_addr[rthdr0->ip6r0_segleft++], - addr, sizeof (struct in6_addr)); - - return 0; - } - - return -1; -} - - -/* RFC 3542, 7.4 - - This function takes a Routing header extension header (pointed to by - the first argument) and writes a new Routing header that sends - datagrams along the reverse of that route. The function reverses the - order of the addresses and sets the segleft member in the new Routing - header to the number of segments. */ -int -inet6_rth_reverse (const void *in, void *out) -{ - struct ip6_rthdr *in_rthdr = (struct ip6_rthdr *) in; - - switch (in_rthdr->ip6r_type) - { - struct ip6_rthdr0 *in_rthdr0; - struct ip6_rthdr0 *out_rthdr0; - case IPV6_RTHDR_TYPE_0: - in_rthdr0 = (struct ip6_rthdr0 *) in; - out_rthdr0 = (struct ip6_rthdr0 *) out; - - /* Copy header, not the addresses. The memory regions can overlap. */ - memmove (out_rthdr0, in_rthdr0, sizeof (struct ip6_rthdr0)); - - int total = in_rthdr0->ip6r0_segleft * 8 / sizeof (struct in6_addr); - for (int i = 0; i < total / 2; ++i) - { - /* Remember, IN_RTHDR0 and OUT_RTHDR0 might overlap. */ - struct in6_addr temp = in_rthdr0->ip6r0_addr[i]; - out_rthdr0->ip6r0_addr[i] = in_rthdr0->ip6r0_addr[total - 1 - i]; - out_rthdr0->ip6r0_addr[total - 1 - i] = temp; - } - if (total % 2 != 0 && in != out) - out_rthdr0->ip6r0_addr[total / 2] = in_rthdr0->ip6r0_addr[total / 2]; - - return 0; - } - - return -1; -} - - -/* RFC 3542, 7.5 - - This function returns the number of segments (addresses) contained in - the Routing header described by BP. */ -int -inet6_rth_segments (const void *bp) -{ - struct ip6_rthdr *rthdr = (struct ip6_rthdr *) bp; - - switch (rthdr->ip6r_type) - { - case IPV6_RTHDR_TYPE_0: - - return rthdr->ip6r_len * 8 / sizeof (struct in6_addr); - } - - return -1; -} - - -/* RFC 3542, 7.6 - - This function returns a pointer to the IPv6 address specified by - index (which must have a value between 0 and one less than the - value returned by 'inet6_rth_segments') in the Routing header - described by BP. */ -struct in6_addr * -inet6_rth_getaddr (const void *bp, int index) -{ - struct ip6_rthdr *rthdr = (struct ip6_rthdr *) bp; - - switch (rthdr->ip6r_type) - { - struct ip6_rthdr0 *rthdr0; - case IPV6_RTHDR_TYPE_0: - rthdr0 = (struct ip6_rthdr0 *) rthdr; - - if (index >= rthdr0->ip6r0_len * 8 / sizeof (struct in6_addr)) - break; - - return &rthdr0->ip6r0_addr[index]; - } - - return NULL; -} |