1 /* $FreeBSD: src/sys/netinet6/route6.c,v 1.1.2.5 2003/01/23 21:06:47 sam Exp $ */ 2 /* $DragonFly: src/sys/netinet6/route6.c,v 1.10 2008/09/04 09:08:22 hasso Exp $ */ 3 /* $KAME: route6.c,v 1.24 2001/03/14 03:07:05 itojun Exp $ */ 4 5 /* 6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the project nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include "opt_inet.h" 35 #include "opt_inet6.h" 36 37 #include <sys/param.h> 38 #include <sys/mbuf.h> 39 #include <sys/socket.h> 40 #include <sys/systm.h> 41 #include <sys/queue.h> 42 43 #include <net/if.h> 44 45 #include <netinet/in.h> 46 #include <netinet6/in6_var.h> 47 #include <netinet/ip6.h> 48 #include <netinet6/ip6_var.h> 49 50 #include <netinet/icmp6.h> 51 52 int 53 route6_input(struct mbuf **mp, int *offp, int proto) /* proto is unused */ 54 { 55 struct ip6_hdr *ip6; 56 struct mbuf *m = *mp; 57 struct ip6_rthdr *rh; 58 int off = *offp, rhlen; 59 60 #ifndef PULLDOWN_TEST 61 IP6_EXTHDR_CHECK(m, off, sizeof(*rh), IPPROTO_DONE); 62 ip6 = mtod(m, struct ip6_hdr *); 63 rh = (struct ip6_rthdr *)((caddr_t)ip6 + off); 64 #else 65 ip6 = mtod(m, struct ip6_hdr *); 66 IP6_EXTHDR_GET(rh, struct ip6_rthdr *, m, off, sizeof(*rh)); 67 if (rh == NULL) { 68 ip6stat.ip6s_tooshort++; 69 return IPPROTO_DONE; 70 } 71 #endif 72 73 switch (rh->ip6r_type) { 74 default: 75 /* unknown routing type */ 76 if (rh->ip6r_segleft == 0) { 77 rhlen = (rh->ip6r_len + 1) << 3; 78 break; /* Final dst. Just ignore the header. */ 79 } 80 ip6stat.ip6s_badoptions++; 81 icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER, 82 (caddr_t)&rh->ip6r_type - (caddr_t)ip6); 83 return (IPPROTO_DONE); 84 } 85 86 *offp += rhlen; 87 return (rh->ip6r_nxt); 88 } 89