xnu-4570.51.1.tar.gz

[apple/xnu.git] / bsd / netinet6 / dest6.c

diff --git a/bsd/netinet6/dest6.c b/bsd/netinet6/dest6.c
index eca5f3ca9285a7ef7df7bf63d4f18871a50e367f..4feef21cb000fff63c0f1452f3a7c5f29df879c6 100644 (file)
--- a/bsd/netinet6/dest6.c
+++ b/bsd/netinet6/dest6.c
@@ -1,4 +1,5 @@
-/*     $KAME: dest6.c,v 1.10 2000/02/28 16:18:11 itojun Exp $  */
+/*     $FreeBSD: src/sys/netinet6/dest6.c,v 1.1.2.3 2001/07/03 11:01:49 ume Exp $      */
+/*     $KAME: dest6.c,v 1.27 2001/03/29 05:34:30 itojun Exp $  */
 
 /*
  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -47,108 +48,61 @@
 #include <netinet/in_var.h>
 #include <netinet/ip6.h>
 #include <netinet6/ip6_var.h>
-#if !(defined(__APPLE__))
-#include <netinet6/in6_pcb.h>
-#endif
 #include <netinet/icmp6.h>
 
-#if MIP6
-int (*mip6_store_dstopt_pre_hook)(struct mbuf *m, u_int8_t *opt,
-                                 u_int8_t off, u_int8_t dstlen) = NULL;
-int (*mip6_rec_ctrl_sig_hook)(struct mbuf *m, int off) = NULL;
-#endif /* MIP6 */
-
 /*
  * Destination options header processing.
  */
 int
-dest6_input(mp, offp, proto)
-       struct mbuf **mp;
-       int *offp, proto;
+dest6_input(struct mbuf **mp, int *offp, int proto)
 {
-       register struct mbuf *m = *mp;
+#pragma unused(proto)
+       struct mbuf *m = *mp;
        int off = *offp, dstoptlen, optlen;
        struct ip6_dest *dstopts;
        u_int8_t *opt;
 
        /* validation of the length of the header */
-#ifndef PULLDOWN_TEST
-       IP6_EXTHDR_CHECK(m, off, sizeof(*dstopts), IPPROTO_DONE);
+       IP6_EXTHDR_CHECK(m, off, sizeof(*dstopts), return IPPROTO_DONE);
        dstopts = (struct ip6_dest *)(mtod(m, caddr_t) + off);
-#else
-       IP6_EXTHDR_GET(dstopts, struct ip6_dest *, m, off, sizeof(*dstopts));
-       if (dstopts == NULL)
-               return IPPROTO_DONE;
-#endif
        dstoptlen = (dstopts->ip6d_len + 1) << 3;
 
-#ifndef PULLDOWN_TEST
-       IP6_EXTHDR_CHECK(m, off, dstoptlen, IPPROTO_DONE);
+       IP6_EXTHDR_CHECK(m, off, dstoptlen, return IPPROTO_DONE);
        dstopts = (struct ip6_dest *)(mtod(m, caddr_t) + off);
-#else
-       IP6_EXTHDR_GET(dstopts, struct ip6_dest *, m, off, dstoptlen);
-       if (dstopts == NULL)
-               return IPPROTO_DONE;
-#endif
        off += dstoptlen;
        dstoptlen -= sizeof(struct ip6_dest);
        opt = (u_int8_t *)dstopts + sizeof(struct ip6_dest);
 
        /* search header for all options. */
        for (optlen = 0; dstoptlen > 0; dstoptlen -= optlen, opt += optlen) {
-               switch(*opt) {
-                case IP6OPT_PAD1:
-                        optlen = 1;
-                        break;
-                case IP6OPT_PADN:
-                        if (dstoptlen < IP6OPT_MINLEN) {
-                                ip6stat.ip6s_toosmall++;
-                                goto bad;
-                        }
-                        optlen = *(opt + 1) + 2;
-                        break;
+               if (*opt != IP6OPT_PAD1 &&
+                   (dstoptlen < IP6OPT_MINLEN || *(opt + 1) + 2 > dstoptlen)) {
+                       ip6stat.ip6s_toosmall++;
+                       goto bad;
+               }
 
-#if MIP6
-                case IP6OPT_BINDING_UPDATE:
-                case IP6OPT_BINDING_ACK:
-                case IP6OPT_BINDING_REQ:
-                case IP6OPT_HOME_ADDRESS:
-                       if (mip6_store_dstopt_pre_hook) {
-                               if ((*mip6_store_dstopt_pre_hook)(m, opt, off, dstoptlen) != 0)
-                                       goto bad;
-                       }
+               switch (*opt) {
+               case IP6OPT_PAD1:
+                       optlen = 1;
+                       break;
+               case IP6OPT_PADN:
                        optlen = *(opt + 1) + 2;
                        break;
-#endif /* MIP6 */
 
-                default:               /* unknown option */
-                        if (dstoptlen < IP6OPT_MINLEN) {
-                                ip6stat.ip6s_toosmall++;
-                                goto bad;
-                        }
-                        if ((optlen = ip6_unknown_opt(opt, m,
-                                                      opt-mtod(m, u_int8_t *))) == -1)
-                                return(IPPROTO_DONE);
-                        optlen += 2;
-                        break;
+               default:                /* unknown option */
+                       optlen = ip6_unknown_opt(opt, m,
+                           opt - mtod(m, u_int8_t *));
+                       if (optlen == -1)
+                               return (IPPROTO_DONE);
+                       optlen += 2;
+                       break;
                }
        }
 
-#if MIP6
-       if (mip6_rec_ctrl_sig_hook) {
-               /*
-                * All Destinations options have been processed. Call MIPv6 to
-                * process stored options.
-                */
-               if ((*mip6_rec_ctrl_sig_hook)(m, *offp) != 0)
-                       return(IPPROTO_DONE);
-       }
-#endif /* MIP6 */
-
        *offp = off;
-       return(dstopts->ip6d_nxt);
+       return (dstopts->ip6d_nxt);
 
   bad:
        m_freem(m);
-       return(IPPROTO_DONE);
+       return (IPPROTO_DONE);
 }