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-rw-r--r--lib/libc/net/ip6opt.c593
1 files changed, 0 insertions, 593 deletions
diff --git a/lib/libc/net/ip6opt.c b/lib/libc/net/ip6opt.c
deleted file mode 100644
index d999fd4..0000000
--- a/lib/libc/net/ip6opt.c
+++ /dev/null
@@ -1,593 +0,0 @@
-/* $KAME: ip6opt.c,v 1.13 2003/06/06 10:08:20 suz Exp $ */
-
-/*
- * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the project nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-#include <sys/param.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-
-#include <netinet/in.h>
-#include <netinet/ip6.h>
-
-#include <string.h>
-#include <stdio.h>
-
-static int ip6optlen(u_int8_t *opt, u_int8_t *lim);
-static void inet6_insert_padopt(u_char *p, int len);
-
-/*
- * This function returns the number of bytes required to hold an option
- * when it is stored as ancillary data, including the cmsghdr structure
- * at the beginning, and any padding at the end (to make its size a
- * multiple of 8 bytes). The argument is the size of the structure
- * defining the option, which must include any pad bytes at the
- * beginning (the value y in the alignment term "xn + y"), the type
- * byte, the length byte, and the option data.
- */
-int
-inet6_option_space(int nbytes)
-{
- nbytes += 2; /* we need space for nxt-hdr and length fields */
- return(CMSG_SPACE((nbytes + 7) & ~7));
-}
-
-/*
- * This function is called once per ancillary data object that will
- * contain either Hop-by-Hop or Destination options. It returns 0 on
- * success or -1 on an error.
- */
-int
-inet6_option_init(void *bp, struct cmsghdr **cmsgp, int type)
-{
- struct cmsghdr *ch = (struct cmsghdr *)bp;
-
- /* argument validation */
- if (type != IPV6_HOPOPTS && type != IPV6_DSTOPTS)
- return(-1);
-
- ch->cmsg_level = IPPROTO_IPV6;
- ch->cmsg_type = type;
- ch->cmsg_len = CMSG_LEN(0);
-
- *cmsgp = ch;
- return(0);
-}
-
-/*
- * This function appends a Hop-by-Hop option or a Destination option
- * into an ancillary data object that has been initialized by
- * inet6_option_init(). This function returns 0 if it succeeds or -1 on
- * an error.
- * multx is the value x in the alignment term "xn + y" described
- * earlier. It must have a value of 1, 2, 4, or 8.
- * plusy is the value y in the alignment term "xn + y" described
- * earlier. It must have a value between 0 and 7, inclusive.
- */
-int
-inet6_option_append(struct cmsghdr *cmsg, const u_int8_t *typep, int multx,
- int plusy)
-{
- int padlen, optlen, off;
- u_char *bp = (u_char *)cmsg + cmsg->cmsg_len;
- struct ip6_ext *eh = (struct ip6_ext *)CMSG_DATA(cmsg);
-
- /* argument validation */
- if (multx != 1 && multx != 2 && multx != 4 && multx != 8)
- return(-1);
- if (plusy < 0 || plusy > 7)
- return(-1);
-
- /*
- * If this is the first option, allocate space for the
- * first 2 bytes(for next header and length fields) of
- * the option header.
- */
- if (bp == (u_char *)eh) {
- bp += 2;
- cmsg->cmsg_len += 2;
- }
-
- /* calculate pad length before the option. */
- off = bp - (u_char *)eh;
- padlen = (((off % multx) + (multx - 1)) & ~(multx - 1)) -
- (off % multx);
- padlen += plusy;
- padlen %= multx; /* keep the pad as short as possible */
- /* insert padding */
- inet6_insert_padopt(bp, padlen);
- cmsg->cmsg_len += padlen;
- bp += padlen;
-
- /* copy the option */
- if (typep[0] == IP6OPT_PAD1)
- optlen = 1;
- else
- optlen = typep[1] + 2;
- memcpy(bp, typep, optlen);
- bp += optlen;
- cmsg->cmsg_len += optlen;
-
- /* calculate pad length after the option and insert the padding */
- off = bp - (u_char *)eh;
- padlen = ((off + 7) & ~7) - off;
- inet6_insert_padopt(bp, padlen);
- bp += padlen;
- cmsg->cmsg_len += padlen;
-
- /* update the length field of the ip6 option header */
- eh->ip6e_len = ((bp - (u_char *)eh) >> 3) - 1;
-
- return(0);
-}
-
-/*
- * This function appends a Hop-by-Hop option or a Destination option
- * into an ancillary data object that has been initialized by
- * inet6_option_init(). This function returns a pointer to the 8-bit
- * option type field that starts the option on success, or NULL on an
- * error.
- * The difference between this function and inet6_option_append() is
- * that the latter copies the contents of a previously built option into
- * the ancillary data object while the current function returns a
- * pointer to the space in the data object where the option's TLV must
- * then be built by the caller.
- *
- */
-u_int8_t *
-inet6_option_alloc(struct cmsghdr *cmsg, int datalen, int multx, int plusy)
-{
- int padlen, off;
- u_int8_t *bp = (u_char *)cmsg + cmsg->cmsg_len;
- u_int8_t *retval;
- struct ip6_ext *eh = (struct ip6_ext *)CMSG_DATA(cmsg);
-
- /* argument validation */
- if (multx != 1 && multx != 2 && multx != 4 && multx != 8)
- return(NULL);
- if (plusy < 0 || plusy > 7)
- return(NULL);
-
- /*
- * If this is the first option, allocate space for the
- * first 2 bytes(for next header and length fields) of
- * the option header.
- */
- if (bp == (u_char *)eh) {
- bp += 2;
- cmsg->cmsg_len += 2;
- }
-
- /* calculate pad length before the option. */
- off = bp - (u_char *)eh;
- padlen = (((off % multx) + (multx - 1)) & ~(multx - 1)) -
- (off % multx);
- padlen += plusy;
- padlen %= multx; /* keep the pad as short as possible */
- /* insert padding */
- inet6_insert_padopt(bp, padlen);
- cmsg->cmsg_len += padlen;
- bp += padlen;
-
- /* keep space to store specified length of data */
- retval = bp;
- bp += datalen;
- cmsg->cmsg_len += datalen;
-
- /* calculate pad length after the option and insert the padding */
- off = bp - (u_char *)eh;
- padlen = ((off + 7) & ~7) - off;
- inet6_insert_padopt(bp, padlen);
- bp += padlen;
- cmsg->cmsg_len += padlen;
-
- /* update the length field of the ip6 option header */
- eh->ip6e_len = ((bp - (u_char *)eh) >> 3) - 1;
-
- return(retval);
-}
-
-/*
- * This function processes the next Hop-by-Hop option or Destination
- * option in an ancillary data object. If another option remains to be
- * processed, the return value of the function is 0 and *tptrp points to
- * the 8-bit option type field (which is followed by the 8-bit option
- * data length, followed by the option data). If no more options remain
- * to be processed, the return value is -1 and *tptrp is NULL. If an
- * error occurs, the return value is -1 and *tptrp is not NULL.
- * (RFC 2292, 6.3.5)
- */
-int
-inet6_option_next(const struct cmsghdr *cmsg, u_int8_t **tptrp)
-{
- struct ip6_ext *ip6e;
- int hdrlen, optlen;
- u_int8_t *lim;
-
- if (cmsg->cmsg_level != IPPROTO_IPV6 ||
- (cmsg->cmsg_type != IPV6_HOPOPTS &&
- cmsg->cmsg_type != IPV6_DSTOPTS))
- return(-1);
-
- /* message length validation */
- if (cmsg->cmsg_len < CMSG_SPACE(sizeof(struct ip6_ext)))
- return(-1);
- ip6e = (struct ip6_ext *)CMSG_DATA(cmsg);
- hdrlen = (ip6e->ip6e_len + 1) << 3;
- if (cmsg->cmsg_len < CMSG_SPACE(hdrlen))
- return(-1);
-
- /*
- * If the caller does not specify the starting point,
- * simply return the 1st option.
- * Otherwise, search the option list for the next option.
- */
- lim = (u_int8_t *)ip6e + hdrlen;
- if (*tptrp == NULL)
- *tptrp = (u_int8_t *)(ip6e + 1);
- else {
- if ((optlen = ip6optlen(*tptrp, lim)) == 0)
- return(-1);
-
- *tptrp = *tptrp + optlen;
- }
- if (*tptrp >= lim) { /* there is no option */
- *tptrp = NULL;
- return(-1);
- }
- /*
- * Finally, checks if the next option is safely stored in the
- * cmsg data.
- */
- if (ip6optlen(*tptrp, lim) == 0)
- return(-1);
- else
- return(0);
-}
-
-/*
- * This function is similar to the inet6_option_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
- * ancillary data object.
- * Note: RFC 2292 says the type of tptrp is u_int8_t *, but we think
- * it's a typo. The variable should be type of u_int8_t **.
- */
-int
-inet6_option_find(const struct cmsghdr *cmsg, u_int8_t **tptrp, int type)
-{
- struct ip6_ext *ip6e;
- int hdrlen, optlen;
- u_int8_t *optp, *lim;
-
- if (cmsg->cmsg_level != IPPROTO_IPV6 ||
- (cmsg->cmsg_type != IPV6_HOPOPTS &&
- cmsg->cmsg_type != IPV6_DSTOPTS))
- return(-1);
-
- /* message length validation */
- if (cmsg->cmsg_len < CMSG_SPACE(sizeof(struct ip6_ext)))
- return(-1);
- ip6e = (struct ip6_ext *)CMSG_DATA(cmsg);
- hdrlen = (ip6e->ip6e_len + 1) << 3;
- if (cmsg->cmsg_len < CMSG_SPACE(hdrlen))
- return(-1);
-
- /*
- * If the caller does not specify the starting point,
- * search from the beginning of the option list.
- * Otherwise, search from *the next option* of the specified point.
- */
- lim = (u_int8_t *)ip6e + hdrlen;
- if (*tptrp == NULL)
- *tptrp = (u_int8_t *)(ip6e + 1);
- else {
- if ((optlen = ip6optlen(*tptrp, lim)) == 0)
- return(-1);
-
- *tptrp = *tptrp + optlen;
- }
- for (optp = *tptrp; optp < lim; optp += optlen) {
- if (*optp == type) {
- *tptrp = optp;
- return(0);
- }
- if ((optlen = ip6optlen(optp, lim)) == 0)
- return(-1);
- }
-
- /* search failed */
- *tptrp = NULL;
- return(-1);
-}
-
-/*
- * Calculate the length of a given IPv6 option. Also checks
- * if the option is safely stored in user's buffer according to the
- * calculated length and the limitation of the buffer.
- */
-static int
-ip6optlen(u_int8_t *opt, u_int8_t *lim)
-{
- int optlen;
-
- if (*opt == IP6OPT_PAD1)
- optlen = 1;
- else {
- /* is there enough space to store type and len? */
- if (opt + 2 > lim)
- return(0);
- optlen = *(opt + 1) + 2;
- }
- if (opt + optlen <= lim)
- return(optlen);
-
- return(0);
-}
-
-static void
-inet6_insert_padopt(u_char *p, int len)
-{
- switch(len) {
- case 0:
- return;
- case 1:
- p[0] = IP6OPT_PAD1;
- return;
- default:
- p[0] = IP6OPT_PADN;
- p[1] = len - 2;
- memset(&p[2], 0, len - 2);
- return;
- }
-}
-
-/*
- * The following functions are defined in RFC3542, which is a successor
- * of RFC2292.
- */
-
-int
-inet6_opt_init(void *extbuf, socklen_t extlen)
-{
- struct ip6_ext *ext = (struct ip6_ext *)extbuf;
-
- if (extlen < 0 || (extlen % 8))
- return(-1);
-
- if (ext) {
- if (extlen == 0)
- return(-1);
- ext->ip6e_len = (extlen >> 3) - 1;
- }
-
- return(2); /* sizeof the next and the length fields */
-}
-
-int
-inet6_opt_append(void *extbuf, socklen_t extlen, int offset, u_int8_t type,
- socklen_t len, u_int8_t align, void **databufp)
-{
- int currentlen = offset, padlen = 0;
-
- /*
- * The option type must have a value from 2 to 255, inclusive.
- * (0 and 1 are reserved for the Pad1 and PadN options, respectively.)
- */
- if (type < 2)
- return(-1);
-
- /*
- * The option data length must have a value between 0 and 255,
- * inclusive, and is the length of the option data that follows.
- */
- if (len < 0 || len > 255)
- return(-1);
-
- /*
- * The align parameter must have a value of 1, 2, 4, or 8.
- * The align value can not exceed the value of len.
- */
- if (align != 1 && align != 2 && align != 4 && align != 8)
- return(-1);
- if (align > len)
- return(-1);
-
- /* Calculate the padding length. */
- currentlen += 2 + len; /* 2 means "type + len" */
- if (currentlen % align)
- padlen = align - (currentlen % align);
-
- /* The option must fit in the extension header buffer. */
- currentlen += padlen;
- if (extlen && /* XXX: right? */
- currentlen > extlen)
- return(-1);
-
- if (extbuf) {
- u_int8_t *optp = (u_int8_t *)extbuf + offset;
-
- if (padlen == 1) {
- /* insert a Pad1 option */
- *optp = IP6OPT_PAD1;
- optp++;
- }
- else if (padlen > 0) {
- /* insert a PadN option for alignment */
- *optp++ = IP6OPT_PADN;
- *optp++ = padlen - 2;
- memset(optp, 0, padlen - 2);
- optp += (padlen - 2);
- }
-
- *optp++ = type;
- *optp++ = len;
-
- *databufp = optp;
- }
-
- return(currentlen);
-}
-
-int
-inet6_opt_finish(void *extbuf, socklen_t extlen, int offset)
-{
- int updatelen = offset > 0 ? (1 + ((offset - 1) | 7)) : 0;;
-
- if (extbuf) {
- u_int8_t *padp;
- int padlen = updatelen - offset;
-
- if (updatelen > extlen)
- return(-1);
-
- padp = (u_int8_t *)extbuf + offset;
- if (padlen == 1)
- *padp = IP6OPT_PAD1;
- else if (padlen > 0) {
- *padp++ = IP6OPT_PADN;
- *padp++ = (padlen - 2);
- memset(padp, 0, padlen - 2);
- }
- }
-
- return(updatelen);
-}
-
-int
-inet6_opt_set_val(void *databuf, int offset, void *val, socklen_t vallen)
-{
-
- memcpy((u_int8_t *)databuf + offset, val, vallen);
- return(offset + vallen);
-}
-
-int
-inet6_opt_next(void *extbuf, socklen_t extlen, int offset, u_int8_t *typep,
- socklen_t *lenp, void **databufp)
-{
- u_int8_t *optp, *lim;
- int optlen;
-
- /* Validate extlen. XXX: is the variable really necessary?? */
- if (extlen == 0 || (extlen % 8))
- return(-1);
- lim = (u_int8_t *)extbuf + extlen;
-
- /*
- * If this is the first time this function called for this options
- * header, simply return the 1st option.
- * Otherwise, search the option list for the next option.
- */
- if (offset == 0) {
- optp = (u_int8_t *)((struct ip6_hbh *)extbuf + 1);
- }
- else
- optp = (u_int8_t *)extbuf + offset;
-
- /* Find the next option skipping any padding options. */
- while(optp < lim) {
- switch(*optp) {
- case IP6OPT_PAD1:
- optp++;
- break;
- case IP6OPT_PADN:
- if ((optlen = ip6optlen(optp, lim)) == 0)
- goto optend;
- optp += optlen;
- break;
- default: /* found */
- if ((optlen = ip6optlen(optp, lim)) == 0)
- goto optend;
- *typep = *optp;
- *lenp = optlen - 2;
- *databufp = optp + 2;
- return(optp + optlen - (u_int8_t *)extbuf);
- }
- }
-
- optend:
- *databufp = NULL; /* for safety */
- return(-1);
-}
-
-int
-inet6_opt_find(void *extbuf, socklen_t extlen, int offset, u_int8_t type,
- socklen_t *lenp, void **databufp)
-{
- u_int8_t *optp, *lim;
- int optlen;
-
- /* Validate extlen. XXX: is the variable really necessary?? */
- if (extlen == 0 || (extlen % 8))
- return(-1);
- lim = (u_int8_t *)extbuf + extlen;
-
- /*
- * If this is the first time this function called for this options
- * header, simply return the 1st option.
- * Otherwise, search the option list for the next option.
- */
- if (offset == 0) {
- optp = (u_int8_t *)((struct ip6_hbh *)extbuf + 1);
- }
- else
- optp = (u_int8_t *)extbuf + offset;
-
- /* Find the specified option */
- while(optp < lim) {
- if ((optlen = ip6optlen(optp, lim)) == 0)
- goto optend;
-
- if (*optp == type) { /* found */
- *lenp = optlen - 2;
- *databufp = optp + 2;
- return(optp + optlen - (u_int8_t *)extbuf);
- }
-
- optp += optlen;
- }
-
- optend:
- *databufp = NULL; /* for safety */
- return(-1);
-}
-
-int
-inet6_opt_get_val(void *databuf, int offset, void *val, socklen_t vallen)
-{
-
- /* we can't assume alignment here */
- memcpy(val, (u_int8_t *)databuf + offset, vallen);
-
- return(offset + vallen);
-}
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