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author | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
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committer | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
commit | 5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 (patch) | |
tree | 4470480d904b65cf14ca524f96f79eca818c3eaf /inet/inet6_rth.c | |
parent | 199fc19d3aaaf57944ef036e15904febe877fc93 (diff) | |
download | glibc-5046dbb4a7eba5eccfd258f92f4735c9ffc8d069.tar.gz glibc-5046dbb4a7eba5eccfd258f92f4735c9ffc8d069.tar.xz glibc-5046dbb4a7eba5eccfd258f92f4735c9ffc8d069.zip |
Prepare for radical source tree reorganization. zack/build-layout-experiment
All top-level files and directories are moved into a temporary storage directory, REORG.TODO, except for files that will certainly still exist in their current form at top level when we're done (COPYING, COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which are moved to the new directory OldChangeLogs, instead), and the generated file INSTALL (which is just deleted; in the new order, there will be no generated files checked into version control).
Diffstat (limited to 'inet/inet6_rth.c')
-rw-r--r-- | inet/inet6_rth.c | 196 |
1 files changed, 0 insertions, 196 deletions
diff --git a/inet/inet6_rth.c b/inet/inet6_rth.c deleted file mode 100644 index 917753da09..0000000000 --- a/inet/inet6_rth.c +++ /dev/null @@ -1,196 +0,0 @@ -/* Copyright (C) 2006-2017 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, see - <http://www.gnu.org/licenses/>. */ - -#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; - if (rthdr0->ip6r0_len * 8 / sizeof (struct in6_addr) - - rthdr0->ip6r0_segleft < 1) - return -1; - - 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_len * 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]; - - out_rthdr0->ip6r0_segleft = total; - - 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; -} |