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-rw-r--r--inet/inet6_rth.c192
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diff --git a/inet/inet6_rth.c b/inet/inet6_rth.c
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--- a/inet/inet6_rth.c
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@@ -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;
-}