dest6.c

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10

    1 /*      $FreeBSD: src/sys/netinet6/dest6.c,v 1.1.2.4 2002/04/28 05:40:26 suz Exp $      */
    2 /*      $KAME: dest6.c,v 1.34 2002/01/08 02:40:55 k-sugyou Exp $        */
    3 
    4 /*
    5  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. Neither the name of the project nor the names of its contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  */
   32 
   33 #include "opt_inet.h"
   34 #include "opt_inet6.h"
   35 
   36 #include <sys/param.h>
   37 #include <sys/systm.h>
   38 #include <sys/malloc.h>
   39 #include <sys/mbuf.h>
   40 #include <sys/domain.h>
   41 #include <sys/protosw.h>
   42 #include <sys/socket.h>
   43 #include <sys/errno.h>
   44 #include <sys/time.h>
   45 #include <sys/kernel.h>
   46 
   47 #include <net/if.h>
   48 #include <net/route.h>
   49 
   50 #include <netinet/in.h>
   51 #include <netinet/in_var.h>
   52 #include <netinet/ip6.h>
   53 #include <netinet6/ip6_var.h>
   54 #include <netinet/icmp6.h>
   55 
   56 /*
   57  * Destination options header processing.
   58  */
   59 int
   60 dest6_input(struct mbuf **mp, int *offp, int proto)
   61 {
   62         struct mbuf *m = *mp;
   63         int off = *offp, dstoptlen, optlen;
   64         struct ip6_dest *dstopts;
   65         u_int8_t *opt;
   66 
   67         /* validation of the length of the header */
   68 #ifndef PULLDOWN_TEST
   69         IP6_EXTHDR_CHECK(m, off, sizeof(*dstopts), IPPROTO_DONE);
   70         dstopts = (struct ip6_dest *)(mtod(m, caddr_t) + off);
   71 #else
   72         IP6_EXTHDR_GET(dstopts, struct ip6_dest *, m, off, sizeof(*dstopts));
   73         if (dstopts == NULL)
   74                 return IPPROTO_DONE;
   75 #endif
   76         dstoptlen = (dstopts->ip6d_len + 1) << 3;
   77 
   78 #ifndef PULLDOWN_TEST
   79         IP6_EXTHDR_CHECK(m, off, dstoptlen, IPPROTO_DONE);
   80         dstopts = (struct ip6_dest *)(mtod(m, caddr_t) + off);
   81 #else
   82         IP6_EXTHDR_GET(dstopts, struct ip6_dest *, m, off, dstoptlen);
   83         if (dstopts == NULL)
   84                 return IPPROTO_DONE;
   85 #endif
   86         off += dstoptlen;
   87         dstoptlen -= sizeof(struct ip6_dest);
   88         opt = (u_int8_t *)dstopts + sizeof(struct ip6_dest);
   89 
   90         /* search header for all options. */
   91         for (optlen = 0; dstoptlen > 0; dstoptlen -= optlen, opt += optlen) {
   92                 if (*opt != IP6OPT_PAD1 &&
   93                     (dstoptlen < IP6OPT_MINLEN || *(opt + 1) + 2 > dstoptlen)) {
   94                         ip6stat.ip6s_toosmall++;
   95                         goto bad;
   96                 }
   97 
   98                 switch (*opt) {
   99                 case IP6OPT_PAD1:
  100                         optlen = 1;
  101                         break;
  102                 case IP6OPT_PADN:
  103                         optlen = *(opt + 1) + 2;
  104                         break;
  105 
  106                 default:                /* unknown option */
  107                         optlen = ip6_unknown_opt(opt, m,
  108                             opt - mtod(m, u_int8_t *));
  109                         if (optlen == -1)
  110                                 return (IPPROTO_DONE);
  111                         optlen += 2;
  112                         break;
  113                 }
  114         }
  115 
  116         *offp = off;
  117         return (dstopts->ip6d_nxt);
  118 
  119 bad:
  120         m_freem(m);
  121         return (IPPROTO_DONE);
  122 }

Cache object: c113d4276e4f1e7e30f309be348cdad2

[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.

FreeBSD/Linux Kernel Cross Reference sys/netinet6/dest6.c

FreeBSD/Linux Kernel Cross Reference
sys/netinet6/dest6.c