1 /* $FreeBSD: src/sys/netinet6/ip6_mroute.c,v 1.2.2.9 2003/01/23 21:06:47 sam Exp $ */
2 /* $KAME: ip6_mroute.c,v 1.58 2001/12/18 02:36:31 itojun Exp $ */
5 * Copyright (C) 1998 WIDE Project.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
33 /* BSDI ip_mroute.c,v 2.10 1996/11/14 00:29:52 jch Exp */
36 * Copyright (c) 1989 Stephen Deering
37 * Copyright (c) 1992, 1993
38 * The Regents of the University of California. All rights reserved.
40 * This code is derived from software contributed to Berkeley by
41 * Stephen Deering of Stanford University.
43 * Redistribution and use in source and binary forms, with or without
44 * modification, are permitted provided that the following conditions
46 * 1. Redistributions of source code must retain the above copyright
47 * notice, this list of conditions and the following disclaimer.
48 * 2. Redistributions in binary form must reproduce the above copyright
49 * notice, this list of conditions and the following disclaimer in the
50 * documentation and/or other materials provided with the distribution.
51 * 3. All advertising materials mentioning features or use of this software
52 * must display the following acknowledgement:
53 * This product includes software developed by the University of
54 * California, Berkeley and its contributors.
55 * 4. Neither the name of the University nor the names of its contributors
56 * may be used to endorse or promote products derived from this software
57 * without specific prior written permission.
59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
71 * @(#)ip_mroute.c 8.2 (Berkeley) 11/15/93
75 * IP multicast forwarding procedures
77 * Written by David Waitzman, BBN Labs, August 1988.
78 * Modified by Steve Deering, Stanford, February 1989.
79 * Modified by Mark J. Steiglitz, Stanford, May, 1991
80 * Modified by Van Jacobson, LBL, January 1993
81 * Modified by Ajit Thyagarajan, PARC, August 1993
82 * Modified by Bill Fenner, PARC, April 1994
84 * MROUTING Revision: 3.5.1.2 + PIM-SMv2 (pimd) Support
88 #include "opt_inet6.h"
90 #include <sys/param.h>
91 #include <sys/systm.h>
92 #include <sys/callout.h>
93 #include <sys/malloc.h>
95 #include <sys/socket.h>
96 #include <sys/socketvar.h>
97 #include <sys/sockio.h>
98 #include <sys/protosw.h>
99 #include <sys/errno.h>
100 #include <sys/time.h>
101 #include <sys/kernel.h>
102 #include <sys/syslog.h>
103 #include <sys/thread2.h>
106 #include <net/route.h>
107 #include <net/raw_cb.h>
108 #include <net/netisr2.h>
109 #include <net/netmsg2.h>
111 #include <netinet/in.h>
112 #include <netinet/in_var.h>
114 #include <netinet/ip6.h>
115 #include <netinet6/ip6_var.h>
116 #include <netinet6/ip6_mroute.h>
117 #include <netinet6/nd6.h>
118 #include <netinet6/pim6.h>
119 #include <netinet6/pim6_var.h>
121 #include <net/net_osdep.h>
123 static MALLOC_DEFINE(M_MRTABLE, "mf6c", "multicast forwarding cache entry");
125 #define M_HASCL(m) ((m)->m_flags & M_EXT)
127 static int ip6_mdq (struct mbuf *, struct ifnet *, struct mf6c *);
128 static void phyint_send (struct ip6_hdr *, struct mif6 *, struct mbuf *);
130 static int set_pim6 (int *);
131 static int socket_send(struct socket *, struct mbuf *, struct sockaddr_in6 *);
132 static int register_send(struct ip6_hdr *, struct mif6 *, struct mbuf *);
135 * Globals. All but ip6_mrouter, ip6_mrtproto and mrt6stat could be static,
136 * except for netstat or debugging purposes.
138 struct socket *ip6_mrouter = NULL;
139 int ip6_mrouter_ver = 0;
140 int ip6_mrtproto = IPPROTO_PIM; /* for netstat only */
141 struct mrt6stat mrt6stat;
143 #define NO_RTE_FOUND 0x1
144 #define RTE_FOUND 0x2
146 struct mf6c *mf6ctable[MF6CTBLSIZ];
147 u_char n6expire[MF6CTBLSIZ];
148 static struct mif6 mif6table[MAXMIFS];
150 u_int mrt6debug = 0; /* debug level */
151 #define DEBUG_MFC 0x02
152 #define DEBUG_FORWARD 0x04
153 #define DEBUG_EXPIRE 0x08
154 #define DEBUG_XMIT 0x10
155 #define DEBUG_REG 0x20
156 #define DEBUG_PIM 0x40
159 static void expire_upcalls (void *);
160 static void expire_upcalls_dispatch(netmsg_t);
161 #define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */
162 #define UPCALL_EXPIRE 6 /* number of timeouts */
166 extern struct socket *ip_mrouter;
171 * 'Interfaces' associated with decapsulator (so we can tell
172 * packets that went through it from ones that get reflected
173 * by a broken gateway). These interfaces are never linked into
174 * the system ifnet list & no routes point to them. I.e., packets
175 * can't be sent this way. They only exist as a placeholder for
176 * multicast source verification.
178 struct ifnet multicast_register_if;
180 #define ENCAP_HOPS 64
185 static mifi_t nummifs = 0;
186 static mifi_t reg_mif_num = (mifi_t)-1;
188 static struct pim6stat pim6stat;
192 * Hash function for a source, group entry
194 #define MF6CHASH(a, g) MF6CHASHMOD((a).s6_addr32[0] ^ (a).s6_addr32[1] ^ \
195 (a).s6_addr32[2] ^ (a).s6_addr32[3] ^ \
196 (g).s6_addr32[0] ^ (g).s6_addr32[1] ^ \
197 (g).s6_addr32[2] ^ (g).s6_addr32[3])
200 * Find a route for a given origin IPv6 address and Multicast group address.
201 * Quality of service parameter to be added in the future!!!
204 #define MF6CFIND(o, g, rt) do { \
205 struct mf6c *_rt = mf6ctable[MF6CHASH(o,g)]; \
207 mrt6stat.mrt6s_mfc_lookups++; \
209 if (IN6_ARE_ADDR_EQUAL(&_rt->mf6c_origin.sin6_addr, &(o)) && \
210 IN6_ARE_ADDR_EQUAL(&_rt->mf6c_mcastgrp.sin6_addr, &(g)) && \
211 (_rt->mf6c_stall == NULL)) { \
215 _rt = _rt->mf6c_next; \
218 mrt6stat.mrt6s_mfc_misses++; \
223 * Macros to compute elapsed time efficiently
224 * Borrowed from Van Jacobson's scheduling code
226 #define TV_DELTA(a, b, delta) do { \
229 delta = (a).tv_usec - (b).tv_usec; \
230 if ((xxs = (a).tv_sec - (b).tv_sec)) { \
239 delta += (1000000 * xxs); \
244 #define TV_LT(a, b) (((a).tv_usec < (b).tv_usec && \
245 (a).tv_sec <= (b).tv_sec) || (a).tv_sec < (b).tv_sec)
248 #define UPCALL_MAX 50
249 u_long upcall_data[UPCALL_MAX + 1];
250 static void collate();
251 #endif /* UPCALL_TIMING */
253 static int get_sg_cnt (struct sioc_sg_req6 *);
254 static int get_mif6_cnt (struct sioc_mif_req6 *);
255 static int ip6_mrouter_init (struct socket *, struct mbuf *, int);
256 static int add_m6if (struct mif6ctl *);
257 static int del_m6if (mifi_t *);
258 static int add_m6fc (struct mf6cctl *);
259 static int del_m6fc (struct mf6cctl *);
261 static struct callout expire_upcalls_ch;
262 static struct netmsg_base expire_upcalls_nmsg;
265 * Handle MRT setsockopt commands to modify the multicast routing tables.
268 ip6_mrouter_set(struct socket *so, struct sockopt *sopt)
273 if (so != ip6_mrouter && sopt->sopt_name != MRT6_INIT)
276 if ((error = soopt_getm(sopt, &m)) != 0) /* XXX */
278 soopt_to_mbuf(sopt, m); /* XXX */
280 switch (sopt->sopt_name) {
285 error = ip6_mrouter_init(so, m, sopt->sopt_name);
288 error = ip6_mrouter_done();
291 error = add_m6if(mtod(m, struct mif6ctl *));
294 error = del_m6if(mtod(m, mifi_t *));
297 error = add_m6fc(mtod(m, struct mf6cctl *));
300 error = del_m6fc(mtod(m, struct mf6cctl *));
303 error = set_pim6(mtod(m, int *));
315 * Handle MRT getsockopt commands
318 ip6_mrouter_get(struct socket *so, struct sockopt *sopt)
322 if (so != ip6_mrouter) return EACCES;
324 switch (sopt->sopt_name) {
326 soopt_from_kbuf(sopt, &pim6, sizeof(pim6));
333 * Handle ioctl commands to obtain information from the cache
336 mrt6_ioctl(int cmd, caddr_t data)
341 case SIOCGETSGCNT_IN6:
342 return (get_sg_cnt((struct sioc_sg_req6 *)data));
343 break; /* for safety */
344 case SIOCGETMIFCNT_IN6:
345 return (get_mif6_cnt((struct sioc_mif_req6 *)data));
346 break; /* for safety */
355 * returns the packet, byte, rpf-failure count for the source group provided
358 get_sg_cnt(struct sioc_sg_req6 *req)
363 MF6CFIND(req->src.sin6_addr, req->grp.sin6_addr, rt);
366 req->pktcnt = rt->mf6c_pkt_cnt;
367 req->bytecnt = rt->mf6c_byte_cnt;
368 req->wrong_if = rt->mf6c_wrong_if;
372 req->pktcnt = req->bytecnt = req->wrong_if = 0xffffffff;
379 * returns the input and output packet and byte counts on the mif provided
382 get_mif6_cnt(struct sioc_mif_req6 *req)
384 mifi_t mifi = req->mifi;
389 req->icount = mif6table[mifi].m6_pkt_in;
390 req->ocount = mif6table[mifi].m6_pkt_out;
391 req->ibytes = mif6table[mifi].m6_bytes_in;
392 req->obytes = mif6table[mifi].m6_bytes_out;
400 if ((*i != 1) && (*i != 0))
409 * Enable multicast routing
412 ip6_mrouter_init(struct socket *so, struct mbuf *m, int cmd)
421 "ip6_mrouter_init: so_type = %d, pr_protocol = %d\n",
422 so->so_type, so->so_proto->pr_protocol);
425 if (so->so_type != SOCK_RAW ||
426 so->so_proto->pr_protocol != IPPROTO_ICMPV6)
429 if (!m || (m->m_len != sizeof(int *)))
436 if (ip6_mrouter != NULL)
440 ip6_mrouter_ver = cmd;
442 bzero((caddr_t)mf6ctable, sizeof(mf6ctable));
443 bzero((caddr_t)n6expire, sizeof(n6expire));
445 pim6 = 0;/* used for stubbing out/in pim stuff */
447 callout_init_mp(&expire_upcalls_ch);
448 netmsg_init(&expire_upcalls_nmsg, NULL, &netisr_adone_rport,
449 MSGF_PRIORITY | MSGF_DROPABLE, expire_upcalls_dispatch);
451 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT,
452 expire_upcalls, NULL);
456 log(LOG_DEBUG, "ip6_mrouter_init\n");
463 * Disable multicast routing
466 ip6_mrouter_done(void)
471 struct in6_ifreq ifr;
474 struct lwkt_msg *lmsg = &expire_upcalls_nmsg.lmsg;
478 if (ip6_mrouter == NULL)
482 * For each phyint in use, disable promiscuous reception of all IPv6
488 * If there is still IPv4 multicast routing daemon,
489 * we remain interfaces to receive all muliticasted packets.
490 * XXX: there may be an interface in which the IPv4 multicast
491 * daemon is not interested...
497 for (mifi = 0; mifi < nummifs; mifi++) {
498 if (mif6table[mifi].m6_ifp &&
499 !(mif6table[mifi].m6_flags & MIFF_REGISTER)) {
500 ifr.ifr_addr.sin6_family = AF_INET6;
501 ifr.ifr_addr.sin6_addr = kin6addr_any;
502 ifp = mif6table[mifi].m6_ifp;
503 ifnet_serialize_all(ifp);
504 ifp->if_ioctl(ifp, SIOCDELMULTI,
505 (caddr_t)&ifr, NULL);
506 ifnet_deserialize_all(ifp);
511 bzero((caddr_t)qtable, sizeof(qtable));
512 bzero((caddr_t)tbftable, sizeof(tbftable));
514 bzero((caddr_t)mif6table, sizeof(mif6table));
517 pim6 = 0; /* used to stub out/in pim specific code */
519 callout_stop(&expire_upcalls_ch);
521 if ((lmsg->ms_flags & MSGF_DONE) == 0)
526 * Free all multicast forwarding cache entries.
528 for (i = 0; i < MF6CTBLSIZ; i++) {
533 for (rte = rt->mf6c_stall; rte != NULL; ) {
534 struct rtdetq *n = rte->next;
537 kfree(rte, M_MRTABLE);
542 kfree(frt, M_MRTABLE);
546 bzero((caddr_t)mf6ctable, sizeof(mf6ctable));
549 * Reset de-encapsulation cache
558 log(LOG_DEBUG, "ip6_mrouter_done\n");
564 static struct sockaddr_in6 sin6 = { sizeof(sin6), AF_INET6 };
567 * Add a mif to the mif table
570 add_m6if(struct mif6ctl *mifcp)
576 struct tbf *m_tbf = tbftable + mifcp->mif6c_mifi;
579 if (mifcp->mif6c_mifi >= MAXMIFS)
581 mifp = mif6table + mifcp->mif6c_mifi;
583 return EADDRINUSE; /* XXX: is it appropriate? */
584 if (mifcp->mif6c_pifi == 0 || mifcp->mif6c_pifi > if_index)
586 ifp = ifindex2ifnet[mifcp->mif6c_pifi];
588 if (mifcp->mif6c_flags & MIFF_REGISTER) {
589 if (reg_mif_num == (mifi_t)-1) {
590 strlcpy(multicast_register_if.if_xname, "register_mif",
592 multicast_register_if.if_flags |= IFF_LOOPBACK;
593 multicast_register_if.if_index = mifcp->mif6c_mifi;
594 reg_mif_num = mifcp->mif6c_mifi;
597 ifp = &multicast_register_if;
601 /* Make sure the interface supports multicast */
602 if ((ifp->if_flags & IFF_MULTICAST) == 0)
606 error = if_allmulti(ifp, 1);
613 mifp->m6_flags = mifcp->mif6c_flags;
616 /* scaling up here allows division by 1024 in critical code */
617 mifp->m6_rate_limit = mifcp->mif6c_rate_limit * 1024 / 1000;
619 /* initialize per mif pkt counters */
621 mifp->m6_pkt_out = 0;
622 mifp->m6_bytes_in = 0;
623 mifp->m6_bytes_out = 0;
626 /* Adjust nummifs up if the mifi is higher than nummifs */
627 if (nummifs <= mifcp->mif6c_mifi)
628 nummifs = mifcp->mif6c_mifi + 1;
633 "add_mif #%d, phyint %s\n",
642 * Delete a mif from the mif table
645 del_m6if(mifi_t *mifip)
647 struct mif6 *mifp = mif6table + *mifip;
651 if (*mifip >= nummifs)
653 if (mifp->m6_ifp == NULL)
658 if (!(mifp->m6_flags & MIFF_REGISTER)) {
660 * XXX: what if there is yet IPv4 multicast daemon
661 * using the interface?
669 bzero((caddr_t)qtable[*mifip], sizeof(qtable[*mifip]));
670 bzero((caddr_t)mifp->m6_tbf, sizeof(*(mifp->m6_tbf)));
672 bzero((caddr_t)mifp, sizeof (*mifp));
674 /* Adjust nummifs down */
675 for (mifi = nummifs; mifi > 0; mifi--)
676 if (mif6table[mifi - 1].m6_ifp)
684 log(LOG_DEBUG, "del_m6if %d, nummifs %d\n", *mifip, nummifs);
694 add_m6fc(struct mf6cctl *mfccp)
701 MF6CFIND(mfccp->mf6cc_origin.sin6_addr,
702 mfccp->mf6cc_mcastgrp.sin6_addr, rt);
704 /* If an entry already exists, just update the fields */
707 if (mrt6debug & DEBUG_MFC)
709 "add_m6fc no upcall h %d o %s g %s p %x\n",
710 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr),
711 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr),
712 mfccp->mf6cc_parent);
716 rt->mf6c_parent = mfccp->mf6cc_parent;
717 rt->mf6c_ifset = mfccp->mf6cc_ifset;
723 * Find the entry for which the upcall was made and update
726 hash = MF6CHASH(mfccp->mf6cc_origin.sin6_addr,
727 mfccp->mf6cc_mcastgrp.sin6_addr);
728 for (rt = mf6ctable[hash], nstl = 0; rt; rt = rt->mf6c_next) {
729 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr,
730 &mfccp->mf6cc_origin.sin6_addr) &&
731 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr,
732 &mfccp->mf6cc_mcastgrp.sin6_addr) &&
733 (rt->mf6c_stall != NULL)) {
737 "add_m6fc: %s o %s g %s p %x dbx %p\n",
738 "multiple kernel entries",
739 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr),
740 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr),
741 mfccp->mf6cc_parent, rt->mf6c_stall);
744 if (mrt6debug & DEBUG_MFC)
746 "add_m6fc o %s g %s p %x dbg %x\n",
747 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr),
748 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr),
749 mfccp->mf6cc_parent, rt->mf6c_stall);
752 rt->mf6c_origin = mfccp->mf6cc_origin;
753 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp;
754 rt->mf6c_parent = mfccp->mf6cc_parent;
755 rt->mf6c_ifset = mfccp->mf6cc_ifset;
756 /* initialize pkt counters per src-grp */
757 rt->mf6c_pkt_cnt = 0;
758 rt->mf6c_byte_cnt = 0;
759 rt->mf6c_wrong_if = 0;
761 rt->mf6c_expire = 0; /* Don't clean this guy up */
764 /* free packets Qed at the end of this entry */
765 for (rte = rt->mf6c_stall; rte != NULL; ) {
766 struct rtdetq *n = rte->next;
767 ip6_mdq(rte->m, rte->ifp, rt);
771 #endif /* UPCALL_TIMING */
772 kfree(rte, M_MRTABLE);
775 rt->mf6c_stall = NULL;
780 * It is possible that an entry is being inserted without an upcall
784 if (mrt6debug & DEBUG_MFC)
785 log(LOG_DEBUG,"add_mfc no upcall h %d o %s g %s p %x\n",
787 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr),
788 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr),
789 mfccp->mf6cc_parent);
792 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) {
793 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr,
794 &mfccp->mf6cc_origin.sin6_addr)&&
795 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr,
796 &mfccp->mf6cc_mcastgrp.sin6_addr)) {
798 rt->mf6c_origin = mfccp->mf6cc_origin;
799 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp;
800 rt->mf6c_parent = mfccp->mf6cc_parent;
801 rt->mf6c_ifset = mfccp->mf6cc_ifset;
802 /* initialize pkt counters per src-grp */
803 rt->mf6c_pkt_cnt = 0;
804 rt->mf6c_byte_cnt = 0;
805 rt->mf6c_wrong_if = 0;
813 /* no upcall, so make a new entry */
814 rt = (struct mf6c *)kmalloc(sizeof(*rt), M_MRTABLE,
821 /* insert new entry at head of hash chain */
822 rt->mf6c_origin = mfccp->mf6cc_origin;
823 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp;
824 rt->mf6c_parent = mfccp->mf6cc_parent;
825 rt->mf6c_ifset = mfccp->mf6cc_ifset;
826 /* initialize pkt counters per src-grp */
827 rt->mf6c_pkt_cnt = 0;
828 rt->mf6c_byte_cnt = 0;
829 rt->mf6c_wrong_if = 0;
831 rt->mf6c_stall = NULL;
833 /* link into table */
834 rt->mf6c_next = mf6ctable[hash];
835 mf6ctable[hash] = rt;
844 * collect delay statistics on the upcalls
847 collate(struct timeval *t)
857 TV_DELTA(tp, *t, delta);
866 #endif /* UPCALL_TIMING */
869 * Delete an mfc entry
872 del_m6fc(struct mf6cctl *mfccp)
874 struct sockaddr_in6 origin;
875 struct sockaddr_in6 mcastgrp;
880 origin = mfccp->mf6cc_origin;
881 mcastgrp = mfccp->mf6cc_mcastgrp;
882 hash = MF6CHASH(origin.sin6_addr, mcastgrp.sin6_addr);
885 if (mrt6debug & DEBUG_MFC)
886 log(LOG_DEBUG,"del_m6fc orig %s mcastgrp %s\n",
887 ip6_sprintf(&origin.sin6_addr),
888 ip6_sprintf(&mcastgrp.sin6_addr));
893 nptr = &mf6ctable[hash];
894 while ((rt = *nptr) != NULL) {
895 if (IN6_ARE_ADDR_EQUAL(&origin.sin6_addr,
896 &rt->mf6c_origin.sin6_addr) &&
897 IN6_ARE_ADDR_EQUAL(&mcastgrp.sin6_addr,
898 &rt->mf6c_mcastgrp.sin6_addr) &&
899 rt->mf6c_stall == NULL)
902 nptr = &rt->mf6c_next;
906 return EADDRNOTAVAIL;
909 *nptr = rt->mf6c_next;
910 kfree(rt, M_MRTABLE);
918 socket_send(struct socket *so, struct mbuf *mm, struct sockaddr_in6 *src)
921 lwkt_gettoken(&so->so_rcv.ssb_token);
922 if (ssb_appendaddr(&so->so_rcv,
923 (struct sockaddr *)src,
926 lwkt_reltoken(&so->so_rcv.ssb_token);
929 lwkt_reltoken(&so->so_rcv.ssb_token);
936 * IPv6 multicast forwarding function. This function assumes that the packet
937 * pointed to by "ip6" has arrived on (or is about to be sent to) the interface
938 * pointed to by "ifp", and the packet is to be relayed to other networks
939 * that have members of the packet's destination IPv6 multicast group.
941 * The packet is returned unscathed to the caller, unless it is
942 * erroneous, in which case a non-zero return value tells the caller to
947 ip6_mforward(struct ip6_hdr *ip6, struct ifnet *ifp, struct mbuf *m)
955 if (mrt6debug & DEBUG_FORWARD)
956 log(LOG_DEBUG, "ip6_mforward: src %s, dst %s, ifindex %d\n",
957 ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst),
962 * Don't forward a packet with Hop limit of zero or one,
963 * or a packet destined to a local-only group.
965 if (ip6->ip6_hlim <= 1 || IN6_IS_ADDR_MC_INTFACELOCAL(&ip6->ip6_dst) ||
966 IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst))
971 * Source address check: do not forward packets with unspecified
972 * source. It was discussed in July 2000, on ipngwg mailing list.
973 * This is rather more serious than unicast cases, because some
974 * MLD packets can be sent with the unspecified source address
975 * (although such packets must normally set 1 to the hop limit field).
977 if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) {
978 ip6stat.ip6s_cantforward++;
979 if (ip6_log_time + ip6_log_interval < time_uptime) {
980 ip6_log_time = time_uptime;
983 "from %s to %s nxt %d received on %s\n",
984 ip6_sprintf(&ip6->ip6_src),
985 ip6_sprintf(&ip6->ip6_dst),
987 if_name(m->m_pkthdr.rcvif));
993 * Determine forwarding mifs from the forwarding cache table
996 MF6CFIND(ip6->ip6_src, ip6->ip6_dst, rt);
998 /* Entry exists, so forward if necessary */
1001 return (ip6_mdq(m, ifp, rt));
1004 * If we don't have a route for packet's origin,
1005 * Make a copy of the packet &
1006 * send message to routing daemon
1013 #ifdef UPCALL_TIMING
1017 #endif /* UPCALL_TIMING */
1019 mrt6stat.mrt6s_no_route++;
1021 if (mrt6debug & (DEBUG_FORWARD | DEBUG_MFC))
1022 log(LOG_DEBUG, "ip6_mforward: no rte s %s g %s\n",
1023 ip6_sprintf(&ip6->ip6_src),
1024 ip6_sprintf(&ip6->ip6_dst));
1028 * Allocate mbufs early so that we don't do extra work if we
1029 * are just going to fail anyway.
1031 rte = (struct rtdetq *)kmalloc(sizeof(*rte), M_MRTABLE,
1037 mb0 = m_copy(m, 0, M_COPYALL);
1039 * Pullup packet header if needed before storing it,
1040 * as other references may modify it in the meantime.
1043 (M_HASCL(mb0) || mb0->m_len < sizeof(struct ip6_hdr)))
1044 mb0 = m_pullup(mb0, sizeof(struct ip6_hdr));
1046 kfree(rte, M_MRTABLE);
1051 /* is there an upcall waiting for this packet? */
1052 hash = MF6CHASH(ip6->ip6_src, ip6->ip6_dst);
1053 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) {
1054 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src,
1055 &rt->mf6c_origin.sin6_addr) &&
1056 IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
1057 &rt->mf6c_mcastgrp.sin6_addr) &&
1058 (rt->mf6c_stall != NULL))
1065 struct omrt6msg *oim;
1068 /* no upcall, so make a new entry */
1069 rt = (struct mf6c *)kmalloc(sizeof(*rt), M_MRTABLE,
1072 kfree(rte, M_MRTABLE);
1078 * Make a copy of the header to send to the user
1081 mm = m_copy(mb0, 0, sizeof(struct ip6_hdr));
1084 kfree(rte, M_MRTABLE);
1086 kfree(rt, M_MRTABLE);
1092 * Send message to routing daemon
1094 sin6.sin6_addr = ip6->ip6_src;
1100 switch (ip6_mrouter_ver) {
1103 oim = mtod(mm, struct omrt6msg *);
1104 oim->im6_msgtype = MRT6MSG_NOCACHE;
1109 im = mtod(mm, struct mrt6msg *);
1110 im->im6_msgtype = MRT6MSG_NOCACHE;
1114 kfree(rte, M_MRTABLE);
1116 kfree(rt, M_MRTABLE);
1122 if (mrt6debug & DEBUG_FORWARD)
1124 "getting the iif info in the kernel\n");
1127 for (mifp = mif6table, mifi = 0;
1128 mifi < nummifs && mifp->m6_ifp != ifp;
1132 switch (ip6_mrouter_ver) {
1135 oim->im6_mif = mifi;
1143 if (socket_send(ip6_mrouter, mm, &sin6) < 0) {
1144 log(LOG_WARNING, "ip6_mforward: ip6_mrouter "
1145 "socket queue full\n");
1146 mrt6stat.mrt6s_upq_sockfull++;
1147 kfree(rte, M_MRTABLE);
1149 kfree(rt, M_MRTABLE);
1154 mrt6stat.mrt6s_upcalls++;
1156 /* insert new entry at head of hash chain */
1157 bzero(rt, sizeof(*rt));
1158 rt->mf6c_origin.sin6_family = AF_INET6;
1159 rt->mf6c_origin.sin6_len = sizeof(struct sockaddr_in6);
1160 rt->mf6c_origin.sin6_addr = ip6->ip6_src;
1161 rt->mf6c_mcastgrp.sin6_family = AF_INET6;
1162 rt->mf6c_mcastgrp.sin6_len = sizeof(struct sockaddr_in6);
1163 rt->mf6c_mcastgrp.sin6_addr = ip6->ip6_dst;
1164 rt->mf6c_expire = UPCALL_EXPIRE;
1166 rt->mf6c_parent = MF6C_INCOMPLETE_PARENT;
1168 /* link into table */
1169 rt->mf6c_next = mf6ctable[hash];
1170 mf6ctable[hash] = rt;
1171 /* Add this entry to the end of the queue */
1172 rt->mf6c_stall = rte;
1174 /* determine if q has overflowed */
1178 for (p = &rt->mf6c_stall; *p != NULL; p = &(*p)->next)
1179 if (++npkts > MAX_UPQ6) {
1180 mrt6stat.mrt6s_upq_ovflw++;
1181 kfree(rte, M_MRTABLE);
1187 /* Add this entry to the end of the queue */
1194 #ifdef UPCALL_TIMING
1196 #endif /* UPCALL_TIMING */
1205 * Clean up cache entries if upcalls are not serviced
1206 * Call from the Slow Timeout mechanism, every half second.
1209 expire_upcalls_dispatch(netmsg_t nmsg)
1212 struct mf6c *mfc, **nptr;
1215 ASSERT_IN_NETISR(0);
1219 lwkt_replymsg(&nmsg->lmsg, 0);
1222 for (i = 0; i < MF6CTBLSIZ; i++) {
1223 if (n6expire[i] == 0)
1225 nptr = &mf6ctable[i];
1226 while ((mfc = *nptr) != NULL) {
1227 rte = mfc->mf6c_stall;
1229 * Skip real cache entries
1230 * Make sure it wasn't marked to not expire (shouldn't happen)
1234 mfc->mf6c_expire != 0 &&
1235 --mfc->mf6c_expire == 0) {
1237 if (mrt6debug & DEBUG_EXPIRE)
1238 log(LOG_DEBUG, "expire_upcalls: expiring (%s %s)\n",
1239 ip6_sprintf(&mfc->mf6c_origin.sin6_addr),
1240 ip6_sprintf(&mfc->mf6c_mcastgrp.sin6_addr));
1243 * drop all the packets
1244 * free the mbuf with the pkt, if, timing info
1247 struct rtdetq *n = rte->next;
1249 kfree(rte, M_MRTABLE);
1251 } while (rte != NULL);
1252 mrt6stat.mrt6s_cache_cleanups++;
1255 *nptr = mfc->mf6c_next;
1256 kfree(mfc, M_MRTABLE);
1258 nptr = &mfc->mf6c_next;
1262 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT,
1263 expire_upcalls, NULL);
1267 expire_upcalls(void *arg __unused)
1269 struct lwkt_msg *lmsg = &expire_upcalls_nmsg.lmsg;
1271 KASSERT(mycpuid == 0, ("expire upcalls timer not on cpu0"));
1274 if (lmsg->ms_flags & MSGF_DONE)
1275 lwkt_sendmsg_oncpu(netisr_cpuport(0), lmsg);
1280 * Packet forwarding routine once entry in the cache is made
1283 ip6_mdq(struct mbuf *m, struct ifnet *ifp, struct mf6c *rt)
1285 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1288 int plen = m->m_pkthdr.len;
1289 u_int32_t dscopein, sscopein;
1292 * Macro to send packet on mif. Since RSVP packets don't get counted on
1293 * input, they shouldn't get counted on output, so statistics keeping is
1297 #define MC6_SEND(ip6, mifp, m) do { \
1298 if ((mifp)->m6_flags & MIFF_REGISTER) \
1299 register_send((ip6), (mifp), (m)); \
1301 phyint_send((ip6), (mifp), (m)); \
1305 * Don't forward if it didn't arrive from the parent mif
1308 mifi = rt->mf6c_parent;
1309 if ((mifi >= nummifs) || (mif6table[mifi].m6_ifp != ifp)) {
1310 /* came in the wrong interface */
1312 if (mrt6debug & DEBUG_FORWARD)
1314 "wrong if: ifid %d mifi %d mififid %x\n",
1315 ifp->if_index, mifi,
1316 mif6table[mifi].m6_ifp->if_index);
1318 mrt6stat.mrt6s_wrong_if++;
1319 rt->mf6c_wrong_if++;
1321 * If we are doing PIM processing, and we are forwarding
1322 * packets on this interface, send a message to the
1325 /* have to make sure this is a valid mif */
1326 if (mifi < nummifs && mif6table[mifi].m6_ifp)
1327 if (pim6 && (m->m_flags & M_LOOP) == 0) {
1329 * Check the M_LOOP flag to avoid an
1330 * unnecessary PIM assert.
1331 * XXX: M_LOOP is an ad-hoc hack...
1333 static struct sockaddr_in6 sin6 =
1334 { sizeof(sin6), AF_INET6 };
1339 struct omrt6msg *oim;
1342 mm = m_copy(m, 0, sizeof(struct ip6_hdr));
1345 mm->m_len < sizeof(struct ip6_hdr)))
1346 mm = m_pullup(mm, sizeof(struct ip6_hdr));
1354 switch (ip6_mrouter_ver) {
1357 oim = mtod(mm, struct omrt6msg *);
1358 oim->im6_msgtype = MRT6MSG_WRONGMIF;
1363 im = mtod(mm, struct mrt6msg *);
1364 im->im6_msgtype = MRT6MSG_WRONGMIF;
1372 for (mifp = mif6table, iif = 0;
1373 iif < nummifs && mifp &&
1374 mifp->m6_ifp != ifp;
1378 switch (ip6_mrouter_ver) {
1382 sin6.sin6_addr = oim->im6_src;
1387 sin6.sin6_addr = im->im6_src;
1391 mrt6stat.mrt6s_upcalls++;
1393 if (socket_send(ip6_mrouter, mm, &sin6) < 0) {
1396 log(LOG_WARNING, "mdq, ip6_mrouter socket queue full\n");
1398 ++mrt6stat.mrt6s_upq_sockfull;
1400 } /* if socket Q full */
1403 } /* if wrong iif */
1405 /* If I sourced this packet, it counts as output, else it was input. */
1406 if (m->m_pkthdr.rcvif == NULL) {
1407 /* XXX: is rcvif really NULL when output?? */
1408 mif6table[mifi].m6_pkt_out++;
1409 mif6table[mifi].m6_bytes_out += plen;
1411 mif6table[mifi].m6_pkt_in++;
1412 mif6table[mifi].m6_bytes_in += plen;
1415 rt->mf6c_byte_cnt += plen;
1418 * For each mif, forward a copy of the packet if there are group
1419 * members downstream on the interface.
1421 if (in6_addr2zoneid(ifp, &ip6->ip6_dst, &dscopein) ||
1422 in6_addr2zoneid(ifp, &ip6->ip6_src, &sscopein))
1424 for (mifp = mif6table, mifi = 0; mifi < nummifs; mifp++, mifi++) {
1425 if (IF_ISSET(mifi, &rt->mf6c_ifset)) {
1426 u_int32_t dscopeout, sscopeout;
1429 * check if the outgoing packet is going to break
1431 * XXX For packets through PIM register tunnel
1432 * interface, we believe a routing daemon.
1434 if (!(mif6table[rt->mf6c_parent].m6_flags &
1436 !(mif6table[mifi].m6_flags & MIFF_REGISTER)) {
1437 if (in6_addr2zoneid(mif6table[mifi].m6_ifp,
1440 in6_addr2zoneid(mif6table[mifi].m6_ifp,
1443 dscopein != dscopeout ||
1444 sscopein != sscopeout) {
1445 ip6stat.ip6s_badscope++;
1451 mifp->m6_bytes_out += plen;
1452 MC6_SEND(ip6, mifp, m);
1459 phyint_send(struct ip6_hdr *ip6, struct mif6 *mifp, struct mbuf *m)
1461 struct mbuf *mb_copy;
1462 struct ifnet *ifp = mifp->m6_ifp;
1464 static struct route_in6 ro;
1465 struct in6_multi *in6m;
1466 struct sockaddr_in6 *dst6;
1469 crit_enter(); /* needs to protect static "ro" below. */
1472 * Make a new reference to the packet; make sure that
1473 * the IPv6 header is actually copied, not just referenced,
1474 * so that ip6_output() only scribbles on the copy.
1476 mb_copy = m_copy(m, 0, M_COPYALL);
1478 (M_HASCL(mb_copy) || mb_copy->m_len < sizeof(struct ip6_hdr)))
1479 mb_copy = m_pullup(mb_copy, sizeof(struct ip6_hdr));
1480 if (mb_copy == NULL) {
1484 /* set MCAST flag to the outgoing packet */
1485 mb_copy->m_flags |= M_MCAST;
1488 * If we sourced the packet, call ip6_output since we may devide
1489 * the packet into fragments when the packet is too big for the
1490 * outgoing interface.
1491 * Otherwise, we can simply send the packet to the interface
1494 if (m->m_pkthdr.rcvif == NULL) {
1495 struct ip6_moptions im6o;
1497 im6o.im6o_multicast_ifp = ifp;
1498 /* XXX: ip6_output will override ip6->ip6_hlim */
1499 im6o.im6o_multicast_hlim = ip6->ip6_hlim;
1500 im6o.im6o_multicast_loop = 1;
1501 error = ip6_output(mb_copy, NULL, &ro,
1502 IPV6_FORWARDING, &im6o, NULL, NULL);
1505 if (mrt6debug & DEBUG_XMIT)
1506 log(LOG_DEBUG, "phyint_send on mif %d err %d\n",
1507 mifp - mif6table, error);
1514 * If we belong to the destination multicast group
1515 * on the outgoing interface, loop back a copy.
1517 dst6 = (struct sockaddr_in6 *)&ro.ro_dst;
1518 in6m = IN6_LOOKUP_MULTI(&ip6->ip6_dst, ifp);
1520 dst6->sin6_len = sizeof(struct sockaddr_in6);
1521 dst6->sin6_family = AF_INET6;
1522 dst6->sin6_addr = ip6->ip6_dst;
1523 ip6_mloopback(ifp, m, (struct sockaddr_in6 *)&ro.ro_dst);
1526 * Put the packet into the sending queue of the outgoing interface
1527 * if it would fit in the MTU of the interface.
1529 linkmtu = IN6_LINKMTU(ifp);
1530 if (mb_copy->m_pkthdr.len <= linkmtu || linkmtu < IPV6_MMTU) {
1531 dst6->sin6_len = sizeof(struct sockaddr_in6);
1532 dst6->sin6_family = AF_INET6;
1533 dst6->sin6_addr = ip6->ip6_dst;
1535 * We just call if_output instead of nd6_output here, since
1536 * we need no ND for a multicast forwarded packet...right?
1538 error = ifp->if_output(ifp, mb_copy,
1539 (struct sockaddr *)&ro.ro_dst, NULL);
1541 if (mrt6debug & DEBUG_XMIT)
1542 log(LOG_DEBUG, "phyint_send on mif %d err %d\n",
1543 mifp - mif6table, error);
1546 #ifdef MULTICAST_PMTUD
1547 icmp6_error(mb_copy, ICMP6_PACKET_TOO_BIG, 0, linkmtu);
1550 if (mrt6debug & DEBUG_XMIT)
1552 "phyint_send: packet too big on %s o %s g %s"
1553 " size %d(discarded)\n",
1555 ip6_sprintf(&ip6->ip6_src),
1556 ip6_sprintf(&ip6->ip6_dst),
1557 mb_copy->m_pkthdr.len);
1558 #endif /* MRT6DEBUG */
1559 m_freem(mb_copy); /* simply discard the packet */
1567 register_send(struct ip6_hdr *ip6, struct mif6 *mif, struct mbuf *m)
1570 int i, len = m->m_pkthdr.len;
1571 static struct sockaddr_in6 sin6 = { sizeof(sin6), AF_INET6 };
1572 struct mrt6msg *im6;
1576 log(LOG_DEBUG, "** IPv6 register_send **\n src %s dst %s\n",
1577 ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst));
1579 ++pim6stat.pim6s_snd_registers;
1581 /* Make a copy of the packet to send to the user level process */
1582 MGETHDR(mm, M_NOWAIT, MT_HEADER);
1585 mm->m_pkthdr.rcvif = NULL;
1586 mm->m_data += max_linkhdr;
1587 mm->m_len = sizeof(struct ip6_hdr);
1589 if ((mm->m_next = m_copy(m, 0, M_COPYALL)) == NULL) {
1593 i = MHLEN - M_LEADINGSPACE(mm);
1596 mm = m_pullup(mm, i);
1599 /* TODO: check it! */
1600 mm->m_pkthdr.len = len + sizeof(struct ip6_hdr);
1603 * Send message to routing daemon
1605 sin6.sin6_addr = ip6->ip6_src;
1607 im6 = mtod(mm, struct mrt6msg *);
1608 im6->im6_msgtype = MRT6MSG_WHOLEPKT;
1611 im6->im6_mif = mif - mif6table;
1613 /* iif info is not given for reg. encap.n */
1614 mrt6stat.mrt6s_upcalls++;
1616 if (socket_send(ip6_mrouter, mm, &sin6) < 0) {
1620 "register_send: ip6_mrouter socket queue full\n");
1622 ++mrt6stat.mrt6s_upq_sockfull;
1629 * PIM sparse mode hook
1630 * Receives the pim control messages, and passes them up to the listening
1631 * socket, using rip6_input.
1632 * The only message processed is the REGISTER pim message; the pim header
1633 * is stripped off, and the inner packet is passed to register_mforward.
1636 pim6_input(struct mbuf **mp, int *offp, int proto)
1638 struct pim *pim; /* pointer to a pim struct */
1639 struct ip6_hdr *ip6;
1641 struct mbuf *m = *mp;
1645 ++pim6stat.pim6s_rcv_total;
1647 ip6 = mtod(m, struct ip6_hdr *);
1648 pimlen = m->m_pkthdr.len - *offp;
1653 if (pimlen < PIM_MINLEN) {
1654 ++pim6stat.pim6s_rcv_tooshort;
1656 if (mrt6debug & DEBUG_PIM)
1657 log(LOG_DEBUG,"pim6_input: PIM packet too short\n");
1660 return (IPPROTO_DONE);
1664 * if the packet is at least as big as a REGISTER, go ahead
1665 * and grab the PIM REGISTER header size, to avoid another
1666 * possible m_pullup() later.
1668 * PIM_MINLEN == pimhdr + u_int32 == 8
1669 * PIM6_REG_MINLEN == pimhdr + reghdr + eip6hdr == 4 + 4 + 40
1671 minlen = (pimlen >= PIM6_REG_MINLEN) ? PIM6_REG_MINLEN : PIM_MINLEN;
1674 * Make sure that the IP6 and PIM headers in contiguous memory, and
1675 * possibly the PIM REGISTER header
1677 #ifndef PULLDOWN_TEST
1678 IP6_EXTHDR_CHECK(m, off, minlen, IPPROTO_DONE);
1679 /* adjust pointer */
1680 ip6 = mtod(m, struct ip6_hdr *);
1682 /* adjust mbuf to point to the PIM header */
1683 pim = (struct pim *)((caddr_t)ip6 + off);
1685 IP6_EXTHDR_GET(pim, struct pim *, m, off, minlen);
1687 pim6stat.pim6s_rcv_tooshort++;
1688 return IPPROTO_DONE;
1692 #define PIM6_CHECKSUM
1693 #ifdef PIM6_CHECKSUM
1698 * Validate checksum.
1699 * If PIM REGISTER, exclude the data packet
1701 if (pim->pim_type == PIM_REGISTER)
1702 cksumlen = PIM_MINLEN;
1706 if (in6_cksum(m, IPPROTO_PIM, off, cksumlen)) {
1707 ++pim6stat.pim6s_rcv_badsum;
1709 if (mrt6debug & DEBUG_PIM)
1711 "pim6_input: invalid checksum\n");
1714 return (IPPROTO_DONE);
1717 #endif /* PIM_CHECKSUM */
1719 /* PIM version check */
1720 if (pim->pim_ver != PIM_VERSION) {
1721 ++pim6stat.pim6s_rcv_badversion;
1724 "pim6_input: incorrect version %d, expecting %d\n",
1725 pim->pim_ver, PIM_VERSION);
1728 return (IPPROTO_DONE);
1731 if (pim->pim_type == PIM_REGISTER) {
1733 * since this is a REGISTER, we'll make a copy of the register
1734 * headers ip6+pim+u_int32_t+encap_ip6, to be passed up to the
1737 static struct sockaddr_in6 dst = { sizeof(dst), AF_INET6 };
1740 struct ip6_hdr *eip6;
1743 ++pim6stat.pim6s_rcv_registers;
1745 if ((reg_mif_num >= nummifs) || (reg_mif_num == (mifi_t) -1)) {
1747 if (mrt6debug & DEBUG_PIM)
1749 "pim6_input: register mif not set: %d\n",
1753 return (IPPROTO_DONE);
1756 reghdr = (u_int32_t *)(pim + 1);
1758 if ((ntohl(*reghdr) & PIM_NULL_REGISTER))
1759 goto pim6_input_to_daemon;
1764 if (pimlen < PIM6_REG_MINLEN) {
1765 ++pim6stat.pim6s_rcv_tooshort;
1766 ++pim6stat.pim6s_rcv_badregisters;
1769 "pim6_input: register packet size too "
1770 "small %d from %s\n",
1771 pimlen, ip6_sprintf(&ip6->ip6_src));
1774 return (IPPROTO_DONE);
1777 eip6 = (struct ip6_hdr *) (reghdr + 1);
1779 if (mrt6debug & DEBUG_PIM)
1781 "pim6_input[register], eip6: %s -> %s, "
1783 ip6_sprintf(&eip6->ip6_src),
1784 ip6_sprintf(&eip6->ip6_dst),
1785 ntohs(eip6->ip6_plen));
1788 /* verify the version number of the inner packet */
1789 if ((eip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
1790 ++pim6stat.pim6s_rcv_badregisters;
1792 log(LOG_DEBUG, "pim6_input: invalid IP version (%d) "
1793 "of the inner packet\n",
1794 (eip6->ip6_vfc & IPV6_VERSION));
1797 return (IPPROTO_NONE);
1800 /* verify the inner packet is destined to a mcast group */
1801 if (!IN6_IS_ADDR_MULTICAST(&eip6->ip6_dst)) {
1802 ++pim6stat.pim6s_rcv_badregisters;
1804 if (mrt6debug & DEBUG_PIM)
1806 "pim6_input: inner packet of register "
1807 "is not multicast %s\n",
1808 ip6_sprintf(&eip6->ip6_dst));
1811 return (IPPROTO_DONE);
1815 * make a copy of the whole header to pass to the daemon later.
1817 mcp = m_copy(m, 0, off + PIM6_REG_MINLEN);
1821 "pim6_input: pim register: "
1822 "could not copy register head\n");
1825 return (IPPROTO_DONE);
1829 * forward the inner ip6 packet; point m_data at the inner ip6.
1831 m_adj(m, off + PIM_MINLEN);
1833 if (mrt6debug & DEBUG_PIM) {
1835 "pim6_input: forwarding decapsulated register: "
1836 "src %s, dst %s, mif %d\n",
1837 ip6_sprintf(&eip6->ip6_src),
1838 ip6_sprintf(&eip6->ip6_dst),
1843 if_simloop(mif6table[reg_mif_num].m6_ifp, m,
1844 dst.sin6_family, 0);
1846 /* prepare the register head to send to the mrouting daemon */
1851 * Pass the PIM message up to the daemon; if it is a register message
1852 * pass the 'head' only up to the daemon. This includes the
1853 * encapsulator ip6 header, pim header, register header and the
1854 * encapsulated ip6 header.
1856 pim6_input_to_daemon:
1857 rip6_input(&m, offp, proto);
1858 return (IPPROTO_DONE);