1 files changed, 1 insertions, 308 deletions

diff --git a/src/lib/libc/net/ip6opt.c b/src/lib/libc/net/ip6opt.c
index 7b4fdc4c4e..d98e300cb6 100644
--- a/src/lib/libc/net/ip6opt.c
+++ b/src/lib/libc/net/ip6opt.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: ip6opt.c,v 1.6 2014/02/17 21:05:39 stsp Exp $ */
+/*      $OpenBSD: ip6opt.c,v 1.7 2014/06/13 15:41:06 chrisz Exp $       */
 /*      $KAME: ip6opt.c,v 1.18 2005/06/15 07:11:35 keiichi Exp $        */
 
 /*
@@ -41,296 +41,6 @@
 #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 0
-        if (typep[0] > 255)
-                return (-1);
-#endif
-
-        /*
-         * 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
@@ -356,23 +66,6 @@ ip6optlen(u_int8_t *opt, u_int8_t *lim)
         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.