diff options
Diffstat (limited to 'newlib/libc/sys/linux/net/ip6opt.c')
| -rw-r--r-- | newlib/libc/sys/linux/net/ip6opt.c | 387 |
1 files changed, 0 insertions, 387 deletions
diff --git a/newlib/libc/sys/linux/net/ip6opt.c b/newlib/libc/sys/linux/net/ip6opt.c deleted file mode 100644 index f3f51d507..000000000 --- a/newlib/libc/sys/linux/net/ip6opt.c +++ /dev/null @@ -1,387 +0,0 @@ -/* - * 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> -#include <sys/types.h> - -#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(nbytes) - 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(bp, cmsgp, type) - 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(cmsg, typep, multx, plusy) - 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 (typep[0] > 255) - 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; - /* 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(cmsg, datalen, multx, plusy) - 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; - /* 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(cmsg, tptrp) - 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(cmsg, tptrp, type) - 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(opt, lim) - u_int8_t *opt, *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; - } -} |