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-rw-r--r--inet/inet6_opt.c278
1 files changed, 0 insertions, 278 deletions
diff --git a/inet/inet6_opt.c b/inet/inet6_opt.c
deleted file mode 100644
index 17d3fee213..0000000000
--- a/inet/inet6_opt.c
+++ /dev/null
@@ -1,278 +0,0 @@
-/* Copyright (C) 2006, 2007 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, 10.1
-
- This function returns the number of bytes needed for the empty
- extension header i.e., without any options. If EXTBUF is not NULL it
- also initializes the extension header to have the correct length
- field. In that case if the EXTLEN value is not a positive (i.e.,
- non-zero) multiple of 8 the function fails and returns -1. */
-int
-inet6_opt_init (void *extbuf, socklen_t extlen)
-{
- if (extbuf != NULL)
- {
- if (extlen <= 0 || (extlen % 8) != 0)
- return -1;
-
- /* Fill in the length in units of 8 octets. */
- struct ip6_hbh *extp = (struct ip6_hbh *) extbuf;
- extp->ip6h_len = extlen / 8;
- }
-
- return sizeof (struct ip6_hbh);
-}
-
-
-static void
-add_padding (uint8_t *extbuf, int offset, int npad)
-{
- if (npad == 1)
- extbuf[offset] = IP6OPT_PAD1;
- else if (npad > 0)
- {
- struct ip6_opt *pad_opt = (struct ip6_opt *) (extbuf + offset);
-
- pad_opt->ip6o_type = IP6OPT_PADN;
- pad_opt->ip6o_len = npad - sizeof (struct ip6_opt);
- /* Clear the memory used by the padding. */
- memset (pad_opt + 1, '\0', pad_opt->ip6o_len);
- }
-}
-
-
-
-/* RFC 3542, 10.2
-
- This function returns the updated total length taking into account
- adding an option with length 'len' and alignment 'align'. If
- EXTBUF is not NULL then, in addition to returning the length, the
- function inserts any needed pad option, initializes the option
- (setting the type and length fields) and returns a pointer to the
- location for the option content in databufp. If the option does
- not fit in the extension header buffer the function returns -1. */
-int
-inet6_opt_append (void *extbuf, socklen_t extlen, int offset, uint8_t type,
- socklen_t len, uint8_t align, void **databufp)
-{
- /* Check minimum offset. */
- if (offset < sizeof (struct ip6_hbh))
- return -1;
-
- /* One cannot add padding options. */
- if (type == IP6OPT_PAD1 || type == IP6OPT_PADN)
- return -1;
-
- /* The option length must fit in one octet. */
- if (len > 255)
- return -1;
-
- /* The alignment can only by 1, 2, 4, or 8 and must not exceed the
- option length. */
- if (align == 0 || align > 8 || (align & (align - 1)) != 0 || align > len)
- return -1;
-
- /* Determine the needed padding for alignment. Following the
- current content of the buffer we have the is the IPv6 option type
- and length, followed immediately by the data. The data has the
- alignment constraints. Therefore padding must be inserted in the
- form of padding options before the new option. */
- int data_offset = offset + sizeof (struct ip6_opt);
- int npad = (align - data_offset % align) & (align - 1);
-
- if (extbuf != NULL)
- {
- /* Now we can check whether the buffer is large enough. */
- if (data_offset + npad + len > extlen)
- return -1;
-
- add_padding (extbuf, offset, npad);
-
- offset += npad;
-
- /* Now prepare the option itself. */
- struct ip6_opt *opt = (struct ip6_opt *) ((uint8_t *) extbuf + offset);
-
- opt->ip6o_type = type;
- opt->ip6o_len = len;
-
- *databufp = opt + 1;
- }
- else
- offset += npad;
-
- return offset + sizeof (struct ip6_opt) + len;
-}
-
-
-/* RFC 3542, 10.3
-
- This function returns the updated total length taking into account
- the final padding of the extension header to make it a multiple of
- 8 bytes. If EXTBUF is not NULL the function also initializes the
- option by inserting a Pad1 or PadN option of the proper length. */
-int
-inet6_opt_finish (void *extbuf, socklen_t extlen, int offset)
-{
- /* Check minimum offset. */
- if (offset < sizeof (struct ip6_hbh))
- return -1;
-
- /* Required padding at the end. */
- int npad = (8 - (offset & 7)) & 7;
-
- if (extbuf != NULL)
- {
- /* Make sure the buffer is large enough. */
- if (offset + npad > extlen)
- return -1;
-
- add_padding (extbuf, offset, npad);
- }
-
- return offset + npad;
-}
-
-
-/* RFC 3542, 10.4
-
- This function inserts data items of various sizes in the data
- portion of the option. VAL should point to the data to be
- inserted. OFFSET specifies where in the data portion of the option
- the value should be inserted; the first byte after the option type
- and length is accessed by specifying an offset of zero. */
-int
-inet6_opt_set_val (void *databuf, int offset, void *val, socklen_t vallen)
-{
- memcpy ((uint8_t *) databuf + offset, val, vallen);
-
- return offset + vallen;
-}
-
-
-/* RFC 3542, 10.5
-
- This function parses received option extension headers returning
- the next option. EXTBUF and EXTLEN specifies the extension header.
- OFFSET should either be zero (for the first option) or the length
- returned by a previous call to 'inet6_opt_next' or
- 'inet6_opt_find'. It specifies the position where to continue
- scanning the extension buffer. */
-int
-inet6_opt_next (void *extbuf, socklen_t extlen, int offset, uint8_t *typep,
- socklen_t *lenp, void **databufp)
-{
- if (offset == 0)
- offset = sizeof (struct ip6_hbh);
- else if (offset < sizeof (struct ip6_hbh))
- return -1;
-
- while (offset < extlen)
- {
- struct ip6_opt *opt = (struct ip6_opt *) ((uint8_t *) extbuf + offset);
-
- if (opt->ip6o_type == IP6OPT_PAD1)
- /* Single byte padding. */
- ++offset;
- else if (opt->ip6o_type == IP6OPT_PADN)
- offset += sizeof (struct ip6_opt) + opt->ip6o_len;
- else
- {
- /* Check whether the option is valid. */
- offset += sizeof (struct ip6_opt) + opt->ip6o_len;
- if (offset > extlen)
- return -1;
-
- *typep = opt->ip6o_type;
- *lenp = opt->ip6o_len;
- *databufp = opt + 1;
- return offset;
- }
- }
-
- return -1;
-}
-
-
-/* RFC 3542, 10.6
-
- This function is similar to the previously described
- 'inet6_opt_next' function, except this function lets the caller
- specify the option type to be searched for, instead of always
- returning the next option in the extension header. */
-int
-inet6_opt_find (void *extbuf, socklen_t extlen, int offset, uint8_t type,
- socklen_t *lenp, void **databufp)
-{
- if (offset == 0)
- offset = sizeof (struct ip6_hbh);
- else if (offset < sizeof (struct ip6_hbh))
- return -1;
-
- while (offset < extlen)
- {
- struct ip6_opt *opt = (struct ip6_opt *) ((uint8_t *) extbuf + offset);
-
- if (opt->ip6o_type == IP6OPT_PAD1)
- {
- /* Single byte padding. */
- ++offset;
- if (type == IP6OPT_PAD1)
- {
- *lenp = 0;
- *databufp = (uint8_t *) extbuf + offset;
- return offset;
- }
- }
- else if (opt->ip6o_type != type)
- offset += sizeof (struct ip6_opt) + opt->ip6o_len;
- else
- {
- /* Check whether the option is valid. */
- offset += sizeof (struct ip6_opt) + opt->ip6o_len;
- if (offset > extlen)
- return -1;
-
- *lenp = opt->ip6o_len;
- *databufp = opt + 1;
- return offset;
- }
- }
-
- return -1;
-}
-
-
-/* RFC 3542, 10.7
-
- This function extracts data items of various sizes in the data
- portion of the option. */
-int
-inet6_opt_get_val (void *databuf, int offset, void *val, socklen_t vallen)
-{
- memcpy (val, (uint8_t *) databuf + offset, vallen);
-
- return offset + vallen;
-}
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