2 * Copyright (C) 1998 WIDE Project.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the project nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * $KAME: ip6_mroute.c,v 1.58 2001/12/18 02:36:31 itojun Exp $
33 * Copyright (c) 1989 Stephen Deering
34 * Copyright (c) 1992, 1993
35 * The Regents of the University of California. All rights reserved.
37 * This code is derived from software contributed to Berkeley by
38 * Stephen Deering of Stanford University.
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
43 * 1. Redistributions of source code must retain the above copyright
44 * notice, this list of conditions and the following disclaimer.
45 * 2. Redistributions in binary form must reproduce the above copyright
46 * notice, this list of conditions and the following disclaimer in the
47 * documentation and/or other materials provided with the distribution.
48 * 4. Neither the name of the University nor the names of its contributors
49 * may be used to endorse or promote products derived from this software
50 * without specific prior written permission.
52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
64 * @(#)ip_mroute.c 8.2 (Berkeley) 11/15/93
65 * BSDI ip_mroute.c,v 2.10 1996/11/14 00:29:52 jch Exp
69 * IP multicast forwarding procedures
71 * Written by David Waitzman, BBN Labs, August 1988.
72 * Modified by Steve Deering, Stanford, February 1989.
73 * Modified by Mark J. Steiglitz, Stanford, May, 1991
74 * Modified by Van Jacobson, LBL, January 1993
75 * Modified by Ajit Thyagarajan, PARC, August 1993
76 * Modified by Bill Fenner, PARC, April 1994
78 * MROUTING Revision: 3.5.1.2 + PIM-SMv2 (pimd) Support
81 #include <sys/cdefs.h>
82 __FBSDID("$FreeBSD$");
85 #include "opt_inet6.h"
86 #include "opt_route.h"
88 #include <sys/param.h>
89 #include <sys/callout.h>
90 #include <sys/errno.h>
91 #include <sys/kernel.h>
93 #include <sys/malloc.h>
95 #include <sys/module.h>
96 #include <sys/domain.h>
97 #include <sys/protosw.h>
98 #include <sys/signalvar.h>
99 #include <sys/socket.h>
100 #include <sys/socketvar.h>
101 #include <sys/sockio.h>
103 #include <sys/sysctl.h>
104 #include <sys/syslog.h>
105 #include <sys/systm.h>
106 #include <sys/time.h>
107 #include <sys/vimage.h>
110 #include <net/if_types.h>
111 #include <net/raw_cb.h>
112 #include <net/route.h>
113 #include <net/vnet.h>
115 #include <netinet/in.h>
116 #include <netinet/in_var.h>
117 #include <netinet/icmp6.h>
118 #include <netinet/vinet.h>
119 #include <netinet/ip_encap.h>
121 #include <netinet/ip6.h>
122 #include <netinet6/ip6_var.h>
123 #include <netinet6/scope6_var.h>
124 #include <netinet6/nd6.h>
125 #include <netinet6/ip6_mroute.h>
126 #include <netinet6/ip6protosw.h>
127 #include <netinet6/pim6.h>
128 #include <netinet6/pim6_var.h>
129 #include <netinet6/vinet6.h>
131 static MALLOC_DEFINE(M_MRTABLE6, "mf6c", "multicast forwarding cache entry");
133 /* XXX: this is a very common idiom; move to <sys/mbuf.h> ? */
134 #define M_HASCL(m) ((m)->m_flags & M_EXT)
136 static int ip6_mdq(struct mbuf *, struct ifnet *, struct mf6c *);
137 static void phyint_send(struct ip6_hdr *, struct mif6 *, struct mbuf *);
138 static void pim6_init(void);
139 static int register_send(struct ip6_hdr *, struct mif6 *, struct mbuf *);
140 static int set_pim6(int *);
141 static int socket_send(struct socket *, struct mbuf *,
142 struct sockaddr_in6 *);
144 extern int in6_mcast_loop;
145 extern struct domain inet6domain;
147 static const struct encaptab *pim6_encap_cookie;
148 static const struct ip6protosw in6_pim_protosw = {
150 .pr_domain = &inet6domain,
151 .pr_protocol = IPPROTO_PIM,
152 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
153 .pr_input = pim6_input,
154 .pr_output = rip6_output,
155 .pr_ctloutput = rip6_ctloutput,
156 .pr_init = pim6_init,
157 .pr_usrreqs = &rip6_usrreqs
159 static int pim6_encapcheck(const struct mbuf *, int, int, void *);
161 #ifdef VIMAGE_GLOBALS
162 static int ip6_mrouter_ver;
165 SYSCTL_DECL(_net_inet6);
166 SYSCTL_DECL(_net_inet6_ip6);
167 SYSCTL_NODE(_net_inet6, IPPROTO_PIM, pim, CTLFLAG_RW, 0, "PIM");
169 static struct mrt6stat mrt6stat;
170 SYSCTL_STRUCT(_net_inet6_ip6, OID_AUTO, mrt6stat, CTLFLAG_RW,
172 "Multicast Routing Statistics (struct mrt6stat, netinet6/ip6_mroute.h)");
174 #define NO_RTE_FOUND 0x1
175 #define RTE_FOUND 0x2
177 static struct mtx mrouter6_mtx;
178 #define MROUTER6_LOCK() mtx_lock(&mrouter6_mtx)
179 #define MROUTER6_UNLOCK() mtx_unlock(&mrouter6_mtx)
180 #define MROUTER6_LOCK_ASSERT() do { \
181 mtx_assert(&mrouter6_mtx, MA_OWNED); \
182 NET_ASSERT_GIANT(); \
184 #define MROUTER6_LOCK_INIT() \
185 mtx_init(&mrouter6_mtx, "IPv6 multicast forwarding", NULL, MTX_DEF)
186 #define MROUTER6_LOCK_DESTROY() mtx_destroy(&mrouter6_mtx)
188 static struct mf6c *mf6ctable[MF6CTBLSIZ];
189 SYSCTL_OPAQUE(_net_inet6_ip6, OID_AUTO, mf6ctable, CTLFLAG_RD,
190 &mf6ctable, sizeof(mf6ctable), "S,*mf6ctable[MF6CTBLSIZ]",
191 "IPv6 Multicast Forwarding Table (struct *mf6ctable[MF6CTBLSIZ], "
192 "netinet6/ip6_mroute.h)");
194 static struct mtx mfc6_mtx;
195 #define MFC6_LOCK() mtx_lock(&mfc6_mtx)
196 #define MFC6_UNLOCK() mtx_unlock(&mfc6_mtx)
197 #define MFC6_LOCK_ASSERT() do { \
198 mtx_assert(&mfc6_mtx, MA_OWNED); \
199 NET_ASSERT_GIANT(); \
201 #define MFC6_LOCK_INIT() \
202 mtx_init(&mfc6_mtx, "IPv6 multicast forwarding cache", NULL, MTX_DEF)
203 #define MFC6_LOCK_DESTROY() mtx_destroy(&mfc6_mtx)
205 static u_char n6expire[MF6CTBLSIZ];
207 static struct mif6 mif6table[MAXMIFS];
208 SYSCTL_OPAQUE(_net_inet6_ip6, OID_AUTO, mif6table, CTLFLAG_RD,
209 &mif6table, sizeof(mif6table), "S,mif6[MAXMIFS]",
210 "IPv6 Multicast Interfaces (struct mif6[MAXMIFS], netinet6/ip6_mroute.h)");
212 static struct mtx mif6_mtx;
213 #define MIF6_LOCK() mtx_lock(&mif6_mtx)
214 #define MIF6_UNLOCK() mtx_unlock(&mif6_mtx)
215 #define MIF6_LOCK_ASSERT() mtx_assert(&mif6_mtx, MA_OWNED)
216 #define MIF6_LOCK_INIT() \
217 mtx_init(&mif6_mtx, "IPv6 multicast interfaces", NULL, MTX_DEF)
218 #define MIF6_LOCK_DESTROY() mtx_destroy(&mif6_mtx)
221 #ifdef VIMAGE_GLOBALS
222 static u_int mrt6debug; /* debug level */
224 #define DEBUG_MFC 0x02
225 #define DEBUG_FORWARD 0x04
226 #define DEBUG_EXPIRE 0x08
227 #define DEBUG_XMIT 0x10
228 #define DEBUG_REG 0x20
229 #define DEBUG_PIM 0x40
232 static void expire_upcalls(void *);
233 #define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */
234 #define UPCALL_EXPIRE 6 /* number of timeouts */
237 * XXX TODO: maintain a count to if_allmulti() calls in struct ifnet.
241 * 'Interfaces' associated with decapsulator (so we can tell
242 * packets that went through it from ones that get reflected
243 * by a broken gateway). Different from IPv4 register_if,
244 * these interfaces are linked into the system ifnet list,
245 * because per-interface IPv6 statistics are maintained in
246 * ifp->if_afdata. But it does not have any routes point
247 * to them. I.e., packets can't be sent this way. They
248 * only exist as a placeholder for multicast source
251 static struct ifnet *multicast_register_if6;
253 #define ENCAP_HOPS 64
258 static mifi_t nummifs = 0;
259 static mifi_t reg_mif_num = (mifi_t)-1;
261 static struct pim6stat pim6stat;
262 SYSCTL_STRUCT(_net_inet6_pim, PIM6CTL_STATS, stats, CTLFLAG_RD,
264 "PIM Statistics (struct pim6stat, netinet6/pim_var.h)");
266 #ifdef VIMAGE_GLOBALS
271 * Hash function for a source, group entry
273 #define MF6CHASH(a, g) MF6CHASHMOD((a).s6_addr32[0] ^ (a).s6_addr32[1] ^ \
274 (a).s6_addr32[2] ^ (a).s6_addr32[3] ^ \
275 (g).s6_addr32[0] ^ (g).s6_addr32[1] ^ \
276 (g).s6_addr32[2] ^ (g).s6_addr32[3])
279 * Find a route for a given origin IPv6 address and Multicast group address.
281 #define MF6CFIND(o, g, rt) do { \
282 struct mf6c *_rt = mf6ctable[MF6CHASH(o,g)]; \
284 mrt6stat.mrt6s_mfc_lookups++; \
286 if (IN6_ARE_ADDR_EQUAL(&_rt->mf6c_origin.sin6_addr, &(o)) && \
287 IN6_ARE_ADDR_EQUAL(&_rt->mf6c_mcastgrp.sin6_addr, &(g)) && \
288 (_rt->mf6c_stall == NULL)) { \
292 _rt = _rt->mf6c_next; \
295 mrt6stat.mrt6s_mfc_misses++; \
297 } while (/*CONSTCOND*/ 0)
300 * Macros to compute elapsed time efficiently
301 * Borrowed from Van Jacobson's scheduling code
302 * XXX: replace with timersub() ?
304 #define TV_DELTA(a, b, delta) do { \
307 delta = (a).tv_usec - (b).tv_usec; \
308 if ((xxs = (a).tv_sec - (b).tv_sec)) { \
317 delta += (1000000 * xxs); \
320 } while (/*CONSTCOND*/ 0)
322 /* XXX: replace with timercmp(a, b, <) ? */
323 #define TV_LT(a, b) (((a).tv_usec < (b).tv_usec && \
324 (a).tv_sec <= (b).tv_sec) || (a).tv_sec < (b).tv_sec)
327 #define UPCALL_MAX 50
328 static u_long upcall_data[UPCALL_MAX + 1];
329 static void collate();
330 #endif /* UPCALL_TIMING */
332 static int ip6_mrouter_init(struct socket *, int, int);
333 static int add_m6fc(struct mf6cctl *);
334 static int add_m6if(struct mif6ctl *);
335 static int del_m6fc(struct mf6cctl *);
336 static int del_m6if(mifi_t *);
337 static int del_m6if_locked(mifi_t *);
338 static int get_mif6_cnt(struct sioc_mif_req6 *);
339 static int get_sg_cnt(struct sioc_sg_req6 *);
341 static struct callout expire_upcalls_ch;
343 int X_ip6_mforward(struct ip6_hdr *, struct ifnet *, struct mbuf *);
344 int X_ip6_mrouter_done(void);
345 int X_ip6_mrouter_set(struct socket *, struct sockopt *);
346 int X_ip6_mrouter_get(struct socket *, struct sockopt *);
347 int X_mrt6_ioctl(int, caddr_t);
352 INIT_VNET_INET6(curvnet);
354 V_ip6_mrouter_ver = 0;
356 V_mrt6debug = 0; /* debug level */
361 * Handle MRT setsockopt commands to modify the multicast routing tables.
364 X_ip6_mrouter_set(struct socket *so, struct sockopt *sopt)
372 if (so != V_ip6_mrouter && sopt->sopt_name != MRT6_INIT)
375 switch (sopt->sopt_name) {
380 error = sooptcopyin(sopt, &optval, sizeof(optval),
384 error = ip6_mrouter_init(so, optval, sopt->sopt_name);
387 error = X_ip6_mrouter_done();
390 error = sooptcopyin(sopt, &mifc, sizeof(mifc), sizeof(mifc));
393 error = add_m6if(&mifc);
396 error = sooptcopyin(sopt, &mfcc, sizeof(mfcc), sizeof(mfcc));
399 error = add_m6fc(&mfcc);
402 error = sooptcopyin(sopt, &mfcc, sizeof(mfcc), sizeof(mfcc));
405 error = del_m6fc(&mfcc);
408 error = sooptcopyin(sopt, &mifi, sizeof(mifi), sizeof(mifi));
411 error = del_m6if(&mifi);
414 error = sooptcopyin(sopt, &optval, sizeof(optval),
418 error = set_pim6(&optval);
429 * Handle MRT getsockopt commands
432 X_ip6_mrouter_get(struct socket *so, struct sockopt *sopt)
434 INIT_VNET_INET6(curvnet);
437 if (so != V_ip6_mrouter)
440 switch (sopt->sopt_name) {
442 error = sooptcopyout(sopt, &V_pim6, sizeof(V_pim6));
449 * Handle ioctl commands to obtain information from the cache
452 X_mrt6_ioctl(int cmd, caddr_t data)
459 case SIOCGETSGCNT_IN6:
460 ret = get_sg_cnt((struct sioc_sg_req6 *)data);
463 case SIOCGETMIFCNT_IN6:
464 ret = get_mif6_cnt((struct sioc_mif_req6 *)data);
475 * returns the packet, byte, rpf-failure count for the source group provided
478 get_sg_cnt(struct sioc_sg_req6 *req)
487 MF6CFIND(req->src.sin6_addr, req->grp.sin6_addr, rt);
491 req->pktcnt = rt->mf6c_pkt_cnt;
492 req->bytecnt = rt->mf6c_byte_cnt;
493 req->wrong_if = rt->mf6c_wrong_if;
502 * returns the input and output packet and byte counts on the mif provided
505 get_mif6_cnt(struct sioc_mif_req6 *req)
515 if (mifi >= nummifs) {
518 req->icount = mif6table[mifi].m6_pkt_in;
519 req->ocount = mif6table[mifi].m6_pkt_out;
520 req->ibytes = mif6table[mifi].m6_bytes_in;
521 req->obytes = mif6table[mifi].m6_bytes_out;
532 INIT_VNET_INET6(curvnet);
533 if ((*i != 1) && (*i != 0))
542 * Enable multicast routing
545 ip6_mrouter_init(struct socket *so, int v, int cmd)
547 INIT_VNET_INET6(curvnet);
549 V_ip6_mrouter_ver = 0;
556 "ip6_mrouter_init: so_type = %d, pr_protocol = %d\n",
557 so->so_type, so->so_proto->pr_protocol);
560 if (so->so_type != SOCK_RAW ||
561 so->so_proto->pr_protocol != IPPROTO_ICMPV6)
565 return (ENOPROTOOPT);
569 if (V_ip6_mrouter != NULL) {
575 V_ip6_mrouter_ver = cmd;
577 bzero((caddr_t)mf6ctable, sizeof(mf6ctable));
578 bzero((caddr_t)n6expire, sizeof(n6expire));
580 V_pim6 = 0;/* used for stubbing out/in pim stuff */
582 callout_init(&expire_upcalls_ch, 0);
583 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT,
584 expire_upcalls, NULL);
590 log(LOG_DEBUG, "ip6_mrouter_init\n");
597 * Disable IPv6 multicast forwarding.
600 X_ip6_mrouter_done(void)
602 INIT_VNET_INET6(curvnet);
610 if (V_ip6_mrouter == NULL) {
616 * For each phyint in use, disable promiscuous reception of all IPv6
619 for (mifi = 0; mifi < nummifs; mifi++) {
620 if (mif6table[mifi].m6_ifp &&
621 !(mif6table[mifi].m6_flags & MIFF_REGISTER)) {
622 if_allmulti(mif6table[mifi].m6_ifp, 0);
625 bzero((caddr_t)mif6table, sizeof(mif6table));
628 V_pim6 = 0; /* used to stub out/in pim specific code */
630 callout_stop(&expire_upcalls_ch);
633 * Free all multicast forwarding cache entries.
636 for (i = 0; i < MF6CTBLSIZ; i++) {
641 for (rte = rt->mf6c_stall; rte != NULL; ) {
642 struct rtdetq *n = rte->next;
645 free(rte, M_MRTABLE6);
650 free(frt, M_MRTABLE6);
653 bzero((caddr_t)mf6ctable, sizeof(mf6ctable));
657 * Reset register interface
659 if (reg_mif_num != (mifi_t)-1 && multicast_register_if6 != NULL) {
660 if_detach(multicast_register_if6);
661 if_free(multicast_register_if6);
662 reg_mif_num = (mifi_t)-1;
663 multicast_register_if6 = NULL;
666 V_ip6_mrouter = NULL;
667 V_ip6_mrouter_ver = 0;
673 log(LOG_DEBUG, "ip6_mrouter_done\n");
679 static struct sockaddr_in6 sin6 = { sizeof(sin6), AF_INET6 };
682 * Add a mif to the mif table
685 add_m6if(struct mif6ctl *mifcp)
687 INIT_VNET_NET(curvnet);
694 if (mifcp->mif6c_mifi >= MAXMIFS) {
698 mifp = mif6table + mifcp->mif6c_mifi;
699 if (mifp->m6_ifp != NULL) {
701 return (EADDRINUSE); /* XXX: is it appropriate? */
703 if (mifcp->mif6c_pifi == 0 || mifcp->mif6c_pifi > V_if_index) {
708 ifp = ifnet_byindex(mifcp->mif6c_pifi);
710 if (mifcp->mif6c_flags & MIFF_REGISTER) {
711 if (reg_mif_num == (mifi_t)-1) {
712 ifp = if_alloc(IFT_OTHER);
714 if_initname(ifp, "register_mif", 0);
715 ifp->if_flags |= IFF_LOOPBACK;
717 multicast_register_if6 = ifp;
718 reg_mif_num = mifcp->mif6c_mifi;
720 * it is impossible to guess the ifindex of the
721 * register interface. So mif6c_pifi is automatically
724 mifcp->mif6c_pifi = ifp->if_index;
726 ifp = multicast_register_if6;
729 /* Make sure the interface supports multicast */
730 if ((ifp->if_flags & IFF_MULTICAST) == 0) {
735 error = if_allmulti(ifp, 1);
742 mifp->m6_flags = mifcp->mif6c_flags;
745 /* initialize per mif pkt counters */
747 mifp->m6_pkt_out = 0;
748 mifp->m6_bytes_in = 0;
749 mifp->m6_bytes_out = 0;
750 bzero(&mifp->m6_route, sizeof(mifp->m6_route));
752 /* Adjust nummifs up if the mifi is higher than nummifs */
753 if (nummifs <= mifcp->mif6c_mifi)
754 nummifs = mifcp->mif6c_mifi + 1;
761 "add_mif #%d, phyint %s\n",
770 * Delete a mif from the mif table
773 del_m6if_locked(mifi_t *mifip)
775 struct mif6 *mifp = mif6table + *mifip;
781 if (*mifip >= nummifs)
783 if (mifp->m6_ifp == NULL)
786 if (!(mifp->m6_flags & MIFF_REGISTER)) {
787 /* XXX: TODO: Maintain an ALLMULTI refcount in struct ifnet. */
791 if (reg_mif_num != (mifi_t)-1 &&
792 multicast_register_if6 != NULL) {
793 if_detach(multicast_register_if6);
794 if_free(multicast_register_if6);
795 reg_mif_num = (mifi_t)-1;
796 multicast_register_if6 = NULL;
800 bzero((caddr_t)mifp, sizeof(*mifp));
802 /* Adjust nummifs down */
803 for (mifi = nummifs; mifi > 0; mifi--)
804 if (mif6table[mifi - 1].m6_ifp)
810 log(LOG_DEBUG, "del_m6if %d, nummifs %d\n", *mifip, nummifs);
817 del_m6if(mifi_t *mifip)
822 cc = del_m6if_locked(mifip);
832 add_m6fc(struct mf6cctl *mfccp)
838 char ip6bufo[INET6_ADDRSTRLEN], ip6bufg[INET6_ADDRSTRLEN];
842 MF6CFIND(mfccp->mf6cc_origin.sin6_addr,
843 mfccp->mf6cc_mcastgrp.sin6_addr, rt);
845 /* If an entry already exists, just update the fields */
848 if (V_mrt6debug & DEBUG_MFC) {
850 "add_m6fc no upcall h %d o %s g %s p %x\n",
851 ip6_sprintf(ip6bufo, &mfccp->mf6cc_origin.sin6_addr),
852 ip6_sprintf(ip6bufg, &mfccp->mf6cc_mcastgrp.sin6_addr),
853 mfccp->mf6cc_parent);
857 rt->mf6c_parent = mfccp->mf6cc_parent;
858 rt->mf6c_ifset = mfccp->mf6cc_ifset;
865 * Find the entry for which the upcall was made and update
867 hash = MF6CHASH(mfccp->mf6cc_origin.sin6_addr,
868 mfccp->mf6cc_mcastgrp.sin6_addr);
869 for (rt = mf6ctable[hash], nstl = 0; rt; rt = rt->mf6c_next) {
870 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr,
871 &mfccp->mf6cc_origin.sin6_addr) &&
872 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr,
873 &mfccp->mf6cc_mcastgrp.sin6_addr) &&
874 (rt->mf6c_stall != NULL)) {
878 "add_m6fc: %s o %s g %s p %x dbx %p\n",
879 "multiple kernel entries",
881 &mfccp->mf6cc_origin.sin6_addr),
883 &mfccp->mf6cc_mcastgrp.sin6_addr),
884 mfccp->mf6cc_parent, rt->mf6c_stall);
887 if (V_mrt6debug & DEBUG_MFC)
889 "add_m6fc o %s g %s p %x dbg %x\n",
891 &mfccp->mf6cc_origin.sin6_addr),
893 &mfccp->mf6cc_mcastgrp.sin6_addr),
894 mfccp->mf6cc_parent, rt->mf6c_stall);
897 rt->mf6c_origin = mfccp->mf6cc_origin;
898 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp;
899 rt->mf6c_parent = mfccp->mf6cc_parent;
900 rt->mf6c_ifset = mfccp->mf6cc_ifset;
901 /* initialize pkt counters per src-grp */
902 rt->mf6c_pkt_cnt = 0;
903 rt->mf6c_byte_cnt = 0;
904 rt->mf6c_wrong_if = 0;
906 rt->mf6c_expire = 0; /* Don't clean this guy up */
909 /* free packets Qed at the end of this entry */
910 for (rte = rt->mf6c_stall; rte != NULL; ) {
911 struct rtdetq *n = rte->next;
912 ip6_mdq(rte->m, rte->ifp, rt);
916 #endif /* UPCALL_TIMING */
917 free(rte, M_MRTABLE6);
920 rt->mf6c_stall = NULL;
925 * It is possible that an entry is being inserted without an upcall
929 if (V_mrt6debug & DEBUG_MFC)
931 "add_mfc no upcall h %d o %s g %s p %x\n",
933 ip6_sprintf(ip6bufo, &mfccp->mf6cc_origin.sin6_addr),
934 ip6_sprintf(ip6bufg, &mfccp->mf6cc_mcastgrp.sin6_addr),
935 mfccp->mf6cc_parent);
938 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) {
940 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr,
941 &mfccp->mf6cc_origin.sin6_addr)&&
942 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr,
943 &mfccp->mf6cc_mcastgrp.sin6_addr)) {
945 rt->mf6c_origin = mfccp->mf6cc_origin;
946 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp;
947 rt->mf6c_parent = mfccp->mf6cc_parent;
948 rt->mf6c_ifset = mfccp->mf6cc_ifset;
949 /* initialize pkt counters per src-grp */
950 rt->mf6c_pkt_cnt = 0;
951 rt->mf6c_byte_cnt = 0;
952 rt->mf6c_wrong_if = 0;
960 /* no upcall, so make a new entry */
961 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE6,
968 /* insert new entry at head of hash chain */
969 rt->mf6c_origin = mfccp->mf6cc_origin;
970 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp;
971 rt->mf6c_parent = mfccp->mf6cc_parent;
972 rt->mf6c_ifset = mfccp->mf6cc_ifset;
973 /* initialize pkt counters per src-grp */
974 rt->mf6c_pkt_cnt = 0;
975 rt->mf6c_byte_cnt = 0;
976 rt->mf6c_wrong_if = 0;
978 rt->mf6c_stall = NULL;
980 /* link into table */
981 rt->mf6c_next = mf6ctable[hash];
982 mf6ctable[hash] = rt;
992 * collect delay statistics on the upcalls
995 collate(struct timeval *t)
1005 TV_DELTA(tp, *t, delta);
1014 #endif /* UPCALL_TIMING */
1017 * Delete an mfc entry
1020 del_m6fc(struct mf6cctl *mfccp)
1022 struct sockaddr_in6 origin;
1023 struct sockaddr_in6 mcastgrp;
1028 origin = mfccp->mf6cc_origin;
1029 mcastgrp = mfccp->mf6cc_mcastgrp;
1030 hash = MF6CHASH(origin.sin6_addr, mcastgrp.sin6_addr);
1033 if (V_mrt6debug & DEBUG_MFC) {
1034 char ip6bufo[INET6_ADDRSTRLEN], ip6bufg[INET6_ADDRSTRLEN];
1035 log(LOG_DEBUG,"del_m6fc orig %s mcastgrp %s\n",
1036 ip6_sprintf(ip6bufo, &origin.sin6_addr),
1037 ip6_sprintf(ip6bufg, &mcastgrp.sin6_addr));
1043 nptr = &mf6ctable[hash];
1044 while ((rt = *nptr) != NULL) {
1045 if (IN6_ARE_ADDR_EQUAL(&origin.sin6_addr,
1046 &rt->mf6c_origin.sin6_addr) &&
1047 IN6_ARE_ADDR_EQUAL(&mcastgrp.sin6_addr,
1048 &rt->mf6c_mcastgrp.sin6_addr) &&
1049 rt->mf6c_stall == NULL)
1052 nptr = &rt->mf6c_next;
1056 return (EADDRNOTAVAIL);
1059 *nptr = rt->mf6c_next;
1060 free(rt, M_MRTABLE6);
1068 socket_send(struct socket *s, struct mbuf *mm, struct sockaddr_in6 *src)
1072 if (sbappendaddr(&s->so_rcv,
1073 (struct sockaddr *)src,
1074 mm, (struct mbuf *)0) != 0) {
1084 * IPv6 multicast forwarding function. This function assumes that the packet
1085 * pointed to by "ip6" has arrived on (or is about to be sent to) the interface
1086 * pointed to by "ifp", and the packet is to be relayed to other networks
1087 * that have members of the packet's destination IPv6 multicast group.
1089 * The packet is returned unscathed to the caller, unless it is
1090 * erroneous, in which case a non-zero return value tells the caller to
1093 * NOTE: this implementation assumes that m->m_pkthdr.rcvif is NULL iff
1094 * this function is called in the originating context (i.e., not when
1095 * forwarding a packet from other node). ip6_output(), which is currently the
1096 * only function that calls this function is called in the originating context,
1097 * explicitly ensures this condition. It is caller's responsibility to ensure
1098 * that if this function is called from somewhere else in the originating
1099 * context in the future.
1102 X_ip6_mforward(struct ip6_hdr *ip6, struct ifnet *ifp, struct mbuf *m)
1104 INIT_VNET_INET6(curvnet);
1109 char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN];
1112 if (V_mrt6debug & DEBUG_FORWARD)
1113 log(LOG_DEBUG, "ip6_mforward: src %s, dst %s, ifindex %d\n",
1114 ip6_sprintf(ip6bufs, &ip6->ip6_src),
1115 ip6_sprintf(ip6bufd, &ip6->ip6_dst),
1120 * Don't forward a packet with Hop limit of zero or one,
1121 * or a packet destined to a local-only group.
1123 if (ip6->ip6_hlim <= 1 || IN6_IS_ADDR_MC_INTFACELOCAL(&ip6->ip6_dst) ||
1124 IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst))
1129 * Source address check: do not forward packets with unspecified
1130 * source. It was discussed in July 2000, on ipngwg mailing list.
1131 * This is rather more serious than unicast cases, because some
1132 * MLD packets can be sent with the unspecified source address
1133 * (although such packets must normally set 1 to the hop limit field).
1135 if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) {
1136 V_ip6stat.ip6s_cantforward++;
1137 if (V_ip6_log_time + V_ip6_log_interval < time_second) {
1138 V_ip6_log_time = time_second;
1141 "from %s to %s nxt %d received on %s\n",
1142 ip6_sprintf(ip6bufs, &ip6->ip6_src),
1143 ip6_sprintf(ip6bufd, &ip6->ip6_dst),
1145 if_name(m->m_pkthdr.rcvif));
1153 * Determine forwarding mifs from the forwarding cache table
1155 MF6CFIND(ip6->ip6_src, ip6->ip6_dst, rt);
1157 /* Entry exists, so forward if necessary */
1160 return (ip6_mdq(m, ifp, rt));
1163 * If we don't have a route for packet's origin,
1164 * Make a copy of the packet &
1165 * send message to routing daemon
1172 #ifdef UPCALL_TIMING
1176 #endif /* UPCALL_TIMING */
1178 mrt6stat.mrt6s_no_route++;
1180 if (V_mrt6debug & (DEBUG_FORWARD | DEBUG_MFC))
1181 log(LOG_DEBUG, "ip6_mforward: no rte s %s g %s\n",
1182 ip6_sprintf(ip6bufs, &ip6->ip6_src),
1183 ip6_sprintf(ip6bufd, &ip6->ip6_dst));
1187 * Allocate mbufs early so that we don't do extra work if we
1188 * are just going to fail anyway.
1190 rte = (struct rtdetq *)malloc(sizeof(*rte), M_MRTABLE6,
1196 mb0 = m_copy(m, 0, M_COPYALL);
1198 * Pullup packet header if needed before storing it,
1199 * as other references may modify it in the meantime.
1202 (M_HASCL(mb0) || mb0->m_len < sizeof(struct ip6_hdr)))
1203 mb0 = m_pullup(mb0, sizeof(struct ip6_hdr));
1205 free(rte, M_MRTABLE6);
1210 /* is there an upcall waiting for this packet? */
1211 hash = MF6CHASH(ip6->ip6_src, ip6->ip6_dst);
1212 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) {
1213 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src,
1214 &rt->mf6c_origin.sin6_addr) &&
1215 IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
1216 &rt->mf6c_mcastgrp.sin6_addr) &&
1217 (rt->mf6c_stall != NULL))
1224 struct omrt6msg *oim;
1227 /* no upcall, so make a new entry */
1228 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE6,
1231 free(rte, M_MRTABLE6);
1237 * Make a copy of the header to send to the user
1240 mm = m_copy(mb0, 0, sizeof(struct ip6_hdr));
1243 free(rte, M_MRTABLE6);
1245 free(rt, M_MRTABLE6);
1251 * Send message to routing daemon
1253 sin6.sin6_addr = ip6->ip6_src;
1259 switch (V_ip6_mrouter_ver) {
1262 oim = mtod(mm, struct omrt6msg *);
1263 oim->im6_msgtype = MRT6MSG_NOCACHE;
1268 im = mtod(mm, struct mrt6msg *);
1269 im->im6_msgtype = MRT6MSG_NOCACHE;
1273 free(rte, M_MRTABLE6);
1275 free(rt, M_MRTABLE6);
1281 if (V_mrt6debug & DEBUG_FORWARD)
1283 "getting the iif info in the kernel\n");
1286 for (mifp = mif6table, mifi = 0;
1287 mifi < nummifs && mifp->m6_ifp != ifp;
1291 switch (V_ip6_mrouter_ver) {
1294 oim->im6_mif = mifi;
1302 if (socket_send(V_ip6_mrouter, mm, &sin6) < 0) {
1303 log(LOG_WARNING, "ip6_mforward: ip6_mrouter "
1304 "socket queue full\n");
1305 mrt6stat.mrt6s_upq_sockfull++;
1306 free(rte, M_MRTABLE6);
1308 free(rt, M_MRTABLE6);
1313 mrt6stat.mrt6s_upcalls++;
1315 /* insert new entry at head of hash chain */
1316 bzero(rt, sizeof(*rt));
1317 rt->mf6c_origin.sin6_family = AF_INET6;
1318 rt->mf6c_origin.sin6_len = sizeof(struct sockaddr_in6);
1319 rt->mf6c_origin.sin6_addr = ip6->ip6_src;
1320 rt->mf6c_mcastgrp.sin6_family = AF_INET6;
1321 rt->mf6c_mcastgrp.sin6_len = sizeof(struct sockaddr_in6);
1322 rt->mf6c_mcastgrp.sin6_addr = ip6->ip6_dst;
1323 rt->mf6c_expire = UPCALL_EXPIRE;
1325 rt->mf6c_parent = MF6C_INCOMPLETE_PARENT;
1327 /* link into table */
1328 rt->mf6c_next = mf6ctable[hash];
1329 mf6ctable[hash] = rt;
1330 /* Add this entry to the end of the queue */
1331 rt->mf6c_stall = rte;
1333 /* determine if q has overflowed */
1337 for (p = &rt->mf6c_stall; *p != NULL; p = &(*p)->next)
1338 if (++npkts > MAX_UPQ6) {
1339 mrt6stat.mrt6s_upq_ovflw++;
1340 free(rte, M_MRTABLE6);
1346 /* Add this entry to the end of the queue */
1353 #ifdef UPCALL_TIMING
1355 #endif /* UPCALL_TIMING */
1364 * Clean up cache entries if upcalls are not serviced
1365 * Call from the Slow Timeout mechanism, every half second.
1368 expire_upcalls(void *unused)
1371 struct mf6c *mfc, **nptr;
1375 for (i = 0; i < MF6CTBLSIZ; i++) {
1376 if (n6expire[i] == 0)
1378 nptr = &mf6ctable[i];
1379 while ((mfc = *nptr) != NULL) {
1380 rte = mfc->mf6c_stall;
1382 * Skip real cache entries
1383 * Make sure it wasn't marked to not expire (shouldn't happen)
1387 mfc->mf6c_expire != 0 &&
1388 --mfc->mf6c_expire == 0) {
1390 if (V_mrt6debug & DEBUG_EXPIRE) {
1391 char ip6bufo[INET6_ADDRSTRLEN];
1392 char ip6bufg[INET6_ADDRSTRLEN];
1393 log(LOG_DEBUG, "expire_upcalls: expiring (%s %s)\n",
1394 ip6_sprintf(ip6bufo, &mfc->mf6c_origin.sin6_addr),
1395 ip6_sprintf(ip6bufg, &mfc->mf6c_mcastgrp.sin6_addr));
1399 * drop all the packets
1400 * free the mbuf with the pkt, if, timing info
1403 struct rtdetq *n = rte->next;
1405 free(rte, M_MRTABLE6);
1407 } while (rte != NULL);
1408 mrt6stat.mrt6s_cache_cleanups++;
1411 *nptr = mfc->mf6c_next;
1412 free(mfc, M_MRTABLE6);
1414 nptr = &mfc->mf6c_next;
1419 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT,
1420 expire_upcalls, NULL);
1424 * Packet forwarding routine once entry in the cache is made
1427 ip6_mdq(struct mbuf *m, struct ifnet *ifp, struct mf6c *rt)
1429 INIT_VNET_INET6(curvnet);
1430 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1433 int plen = m->m_pkthdr.len;
1434 struct in6_addr src0, dst0; /* copies for local work */
1435 u_int32_t iszone, idzone, oszone, odzone;
1439 * Macro to send packet on mif. Since RSVP packets don't get counted on
1440 * input, they shouldn't get counted on output, so statistics keeping is
1444 #define MC6_SEND(ip6, mifp, m) do { \
1445 if ((mifp)->m6_flags & MIFF_REGISTER) \
1446 register_send((ip6), (mifp), (m)); \
1448 phyint_send((ip6), (mifp), (m)); \
1449 } while (/*CONSTCOND*/ 0)
1452 * Don't forward if it didn't arrive from the parent mif
1455 mifi = rt->mf6c_parent;
1456 if ((mifi >= nummifs) || (mif6table[mifi].m6_ifp != ifp)) {
1457 /* came in the wrong interface */
1459 if (V_mrt6debug & DEBUG_FORWARD)
1461 "wrong if: ifid %d mifi %d mififid %x\n",
1462 ifp->if_index, mifi,
1463 mif6table[mifi].m6_ifp->if_index);
1465 mrt6stat.mrt6s_wrong_if++;
1466 rt->mf6c_wrong_if++;
1468 * If we are doing PIM processing, and we are forwarding
1469 * packets on this interface, send a message to the
1472 /* have to make sure this is a valid mif */
1473 if (mifi < nummifs && mif6table[mifi].m6_ifp)
1474 if (V_pim6 && (m->m_flags & M_LOOP) == 0) {
1476 * Check the M_LOOP flag to avoid an
1477 * unnecessary PIM assert.
1478 * XXX: M_LOOP is an ad-hoc hack...
1480 static struct sockaddr_in6 sin6 =
1481 { sizeof(sin6), AF_INET6 };
1486 struct omrt6msg *oim;
1489 mm = m_copy(m, 0, sizeof(struct ip6_hdr));
1492 mm->m_len < sizeof(struct ip6_hdr)))
1493 mm = m_pullup(mm, sizeof(struct ip6_hdr));
1501 switch (V_ip6_mrouter_ver) {
1504 oim = mtod(mm, struct omrt6msg *);
1505 oim->im6_msgtype = MRT6MSG_WRONGMIF;
1510 im = mtod(mm, struct mrt6msg *);
1511 im->im6_msgtype = MRT6MSG_WRONGMIF;
1519 for (mifp = mif6table, iif = 0;
1520 iif < nummifs && mifp &&
1521 mifp->m6_ifp != ifp;
1525 switch (V_ip6_mrouter_ver) {
1529 sin6.sin6_addr = oim->im6_src;
1534 sin6.sin6_addr = im->im6_src;
1538 mrt6stat.mrt6s_upcalls++;
1540 if (socket_send(V_ip6_mrouter, mm, &sin6) < 0) {
1543 log(LOG_WARNING, "mdq, ip6_mrouter socket queue full\n");
1545 ++mrt6stat.mrt6s_upq_sockfull;
1547 } /* if socket Q full */
1550 } /* if wrong iif */
1552 /* If I sourced this packet, it counts as output, else it was input. */
1553 if (m->m_pkthdr.rcvif == NULL) {
1554 /* XXX: is rcvif really NULL when output?? */
1555 mif6table[mifi].m6_pkt_out++;
1556 mif6table[mifi].m6_bytes_out += plen;
1558 mif6table[mifi].m6_pkt_in++;
1559 mif6table[mifi].m6_bytes_in += plen;
1562 rt->mf6c_byte_cnt += plen;
1565 * For each mif, forward a copy of the packet if there are group
1566 * members downstream on the interface.
1568 src0 = ip6->ip6_src;
1569 dst0 = ip6->ip6_dst;
1570 if ((error = in6_setscope(&src0, ifp, &iszone)) != 0 ||
1571 (error = in6_setscope(&dst0, ifp, &idzone)) != 0) {
1572 V_ip6stat.ip6s_badscope++;
1575 for (mifp = mif6table, mifi = 0; mifi < nummifs; mifp++, mifi++) {
1576 if (IF_ISSET(mifi, &rt->mf6c_ifset)) {
1578 * check if the outgoing packet is going to break
1580 * XXX For packets through PIM register tunnel
1581 * interface, we believe a routing daemon.
1583 if (!(mif6table[rt->mf6c_parent].m6_flags &
1585 !(mif6table[mifi].m6_flags & MIFF_REGISTER)) {
1586 if (in6_setscope(&src0, mif6table[mifi].m6_ifp,
1588 in6_setscope(&dst0, mif6table[mifi].m6_ifp,
1592 V_ip6stat.ip6s_badscope++;
1598 mifp->m6_bytes_out += plen;
1599 MC6_SEND(ip6, mifp, m);
1606 phyint_send(struct ip6_hdr *ip6, struct mif6 *mifp, struct mbuf *m)
1608 INIT_VNET_INET6(curvnet);
1609 struct mbuf *mb_copy;
1610 struct ifnet *ifp = mifp->m6_ifp;
1612 struct sockaddr_in6 *dst6;
1615 dst6 = &mifp->m6_route.ro_dst;
1618 * Make a new reference to the packet; make sure that
1619 * the IPv6 header is actually copied, not just referenced,
1620 * so that ip6_output() only scribbles on the copy.
1622 mb_copy = m_copy(m, 0, M_COPYALL);
1624 (M_HASCL(mb_copy) || mb_copy->m_len < sizeof(struct ip6_hdr)))
1625 mb_copy = m_pullup(mb_copy, sizeof(struct ip6_hdr));
1626 if (mb_copy == NULL) {
1629 /* set MCAST flag to the outgoing packet */
1630 mb_copy->m_flags |= M_MCAST;
1633 * If we sourced the packet, call ip6_output since we may devide
1634 * the packet into fragments when the packet is too big for the
1635 * outgoing interface.
1636 * Otherwise, we can simply send the packet to the interface
1639 if (m->m_pkthdr.rcvif == NULL) {
1640 struct ip6_moptions im6o;
1642 im6o.im6o_multicast_ifp = ifp;
1643 /* XXX: ip6_output will override ip6->ip6_hlim */
1644 im6o.im6o_multicast_hlim = ip6->ip6_hlim;
1645 im6o.im6o_multicast_loop = 1;
1646 error = ip6_output(mb_copy, NULL, &mifp->m6_route,
1647 IPV6_FORWARDING, &im6o, NULL, NULL);
1650 if (V_mrt6debug & DEBUG_XMIT)
1651 log(LOG_DEBUG, "phyint_send on mif %d err %d\n",
1652 mifp - mif6table, error);
1658 * If configured to loop back multicasts by default,
1659 * loop back a copy now.
1661 if (in6_mcast_loop) {
1662 dst6->sin6_len = sizeof(struct sockaddr_in6);
1663 dst6->sin6_family = AF_INET6;
1664 dst6->sin6_addr = ip6->ip6_dst;
1665 ip6_mloopback(ifp, m, &mifp->m6_route.ro_dst);
1669 * Put the packet into the sending queue of the outgoing interface
1670 * if it would fit in the MTU of the interface.
1672 linkmtu = IN6_LINKMTU(ifp);
1673 if (mb_copy->m_pkthdr.len <= linkmtu || linkmtu < IPV6_MMTU) {
1674 dst6->sin6_len = sizeof(struct sockaddr_in6);
1675 dst6->sin6_family = AF_INET6;
1676 dst6->sin6_addr = ip6->ip6_dst;
1678 * We just call if_output instead of nd6_output here, since
1679 * we need no ND for a multicast forwarded packet...right?
1681 error = (*ifp->if_output)(ifp, mb_copy,
1682 (struct sockaddr *)&mifp->m6_route.ro_dst, NULL);
1684 if (V_mrt6debug & DEBUG_XMIT)
1685 log(LOG_DEBUG, "phyint_send on mif %d err %d\n",
1686 mifp - mif6table, error);
1690 * pMTU discovery is intentionally disabled by default, since
1691 * various router may notify pMTU in multicast, which can be
1692 * a DDoS to a router
1694 if (V_ip6_mcast_pmtu)
1695 icmp6_error(mb_copy, ICMP6_PACKET_TOO_BIG, 0, linkmtu);
1698 if (V_mrt6debug & DEBUG_XMIT) {
1699 char ip6bufs[INET6_ADDRSTRLEN];
1700 char ip6bufd[INET6_ADDRSTRLEN];
1702 "phyint_send: packet too big on %s o %s "
1703 "g %s size %d(discarded)\n",
1705 ip6_sprintf(ip6bufs, &ip6->ip6_src),
1706 ip6_sprintf(ip6bufd, &ip6->ip6_dst),
1707 mb_copy->m_pkthdr.len);
1709 #endif /* MRT6DEBUG */
1710 m_freem(mb_copy); /* simply discard the packet */
1716 register_send(struct ip6_hdr *ip6, struct mif6 *mif, struct mbuf *m)
1719 int i, len = m->m_pkthdr.len;
1720 static struct sockaddr_in6 sin6 = { sizeof(sin6), AF_INET6 };
1721 struct mrt6msg *im6;
1725 char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN];
1726 log(LOG_DEBUG, "** IPv6 register_send **\n src %s dst %s\n",
1727 ip6_sprintf(ip6bufs, &ip6->ip6_src),
1728 ip6_sprintf(ip6bufd, &ip6->ip6_dst));
1731 ++pim6stat.pim6s_snd_registers;
1733 /* Make a copy of the packet to send to the user level process */
1734 MGETHDR(mm, M_DONTWAIT, MT_HEADER);
1737 mm->m_pkthdr.rcvif = NULL;
1738 mm->m_data += max_linkhdr;
1739 mm->m_len = sizeof(struct ip6_hdr);
1741 if ((mm->m_next = m_copy(m, 0, M_COPYALL)) == NULL) {
1745 i = MHLEN - M_LEADINGSPACE(mm);
1748 mm = m_pullup(mm, i);
1751 /* TODO: check it! */
1752 mm->m_pkthdr.len = len + sizeof(struct ip6_hdr);
1755 * Send message to routing daemon
1757 sin6.sin6_addr = ip6->ip6_src;
1759 im6 = mtod(mm, struct mrt6msg *);
1760 im6->im6_msgtype = MRT6MSG_WHOLEPKT;
1763 im6->im6_mif = mif - mif6table;
1765 /* iif info is not given for reg. encap.n */
1766 mrt6stat.mrt6s_upcalls++;
1768 if (socket_send(V_ip6_mrouter, mm, &sin6) < 0) {
1772 "register_send: ip6_mrouter socket queue full\n");
1774 ++mrt6stat.mrt6s_upq_sockfull;
1781 * pim6_encapcheck() is called by the encap6_input() path at runtime to
1782 * determine if a packet is for PIM; allowing PIM to be dynamically loaded
1786 pim6_encapcheck(const struct mbuf *m, int off, int proto, void *arg)
1790 KASSERT(proto == IPPROTO_PIM, ("not for IPPROTO_PIM"));
1792 if (proto != IPPROTO_PIM)
1793 return 0; /* not for us; reject the datagram. */
1795 return 64; /* claim the datagram. */
1799 * PIM sparse mode hook
1800 * Receives the pim control messages, and passes them up to the listening
1801 * socket, using rip6_input.
1802 * The only message processed is the REGISTER pim message; the pim header
1803 * is stripped off, and the inner packet is passed to register_mforward.
1806 pim6_input(struct mbuf **mp, int *offp, int proto)
1808 INIT_VNET_INET6(curvnet);
1809 struct pim *pim; /* pointer to a pim struct */
1810 struct ip6_hdr *ip6;
1812 struct mbuf *m = *mp;
1816 ++pim6stat.pim6s_rcv_total;
1818 ip6 = mtod(m, struct ip6_hdr *);
1819 pimlen = m->m_pkthdr.len - *offp;
1824 if (pimlen < PIM_MINLEN) {
1825 ++pim6stat.pim6s_rcv_tooshort;
1827 if (V_mrt6debug & DEBUG_PIM)
1828 log(LOG_DEBUG,"pim6_input: PIM packet too short\n");
1831 return (IPPROTO_DONE);
1835 * if the packet is at least as big as a REGISTER, go ahead
1836 * and grab the PIM REGISTER header size, to avoid another
1837 * possible m_pullup() later.
1839 * PIM_MINLEN == pimhdr + u_int32 == 8
1840 * PIM6_REG_MINLEN == pimhdr + reghdr + eip6hdr == 4 + 4 + 40
1842 minlen = (pimlen >= PIM6_REG_MINLEN) ? PIM6_REG_MINLEN : PIM_MINLEN;
1845 * Make sure that the IP6 and PIM headers in contiguous memory, and
1846 * possibly the PIM REGISTER header
1848 #ifndef PULLDOWN_TEST
1849 IP6_EXTHDR_CHECK(m, off, minlen, IPPROTO_DONE);
1850 /* adjust pointer */
1851 ip6 = mtod(m, struct ip6_hdr *);
1853 /* adjust mbuf to point to the PIM header */
1854 pim = (struct pim *)((caddr_t)ip6 + off);
1856 IP6_EXTHDR_GET(pim, struct pim *, m, off, minlen);
1858 pim6stat.pim6s_rcv_tooshort++;
1859 return (IPPROTO_DONE);
1863 #define PIM6_CHECKSUM
1864 #ifdef PIM6_CHECKSUM
1869 * Validate checksum.
1870 * If PIM REGISTER, exclude the data packet
1872 if (pim->pim_type == PIM_REGISTER)
1873 cksumlen = PIM_MINLEN;
1877 if (in6_cksum(m, IPPROTO_PIM, off, cksumlen)) {
1878 ++pim6stat.pim6s_rcv_badsum;
1880 if (V_mrt6debug & DEBUG_PIM)
1882 "pim6_input: invalid checksum\n");
1885 return (IPPROTO_DONE);
1888 #endif /* PIM_CHECKSUM */
1890 /* PIM version check */
1891 if (pim->pim_ver != PIM_VERSION) {
1892 ++pim6stat.pim6s_rcv_badversion;
1895 "pim6_input: incorrect version %d, expecting %d\n",
1896 pim->pim_ver, PIM_VERSION);
1899 return (IPPROTO_DONE);
1902 if (pim->pim_type == PIM_REGISTER) {
1904 * since this is a REGISTER, we'll make a copy of the register
1905 * headers ip6+pim+u_int32_t+encap_ip6, to be passed up to the
1908 static struct sockaddr_in6 dst = { sizeof(dst), AF_INET6 };
1911 struct ip6_hdr *eip6;
1915 char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN];
1918 ++pim6stat.pim6s_rcv_registers;
1920 if ((reg_mif_num >= nummifs) || (reg_mif_num == (mifi_t) -1)) {
1922 if (V_mrt6debug & DEBUG_PIM)
1924 "pim6_input: register mif not set: %d\n",
1928 return (IPPROTO_DONE);
1931 reghdr = (u_int32_t *)(pim + 1);
1933 if ((ntohl(*reghdr) & PIM_NULL_REGISTER))
1934 goto pim6_input_to_daemon;
1939 if (pimlen < PIM6_REG_MINLEN) {
1940 ++pim6stat.pim6s_rcv_tooshort;
1941 ++pim6stat.pim6s_rcv_badregisters;
1944 "pim6_input: register packet size too "
1945 "small %d from %s\n",
1946 pimlen, ip6_sprintf(ip6bufs, &ip6->ip6_src));
1949 return (IPPROTO_DONE);
1952 eip6 = (struct ip6_hdr *) (reghdr + 1);
1954 if (V_mrt6debug & DEBUG_PIM)
1956 "pim6_input[register], eip6: %s -> %s, "
1958 ip6_sprintf(ip6bufs, &eip6->ip6_src),
1959 ip6_sprintf(ip6bufd, &eip6->ip6_dst),
1960 ntohs(eip6->ip6_plen));
1963 /* verify the version number of the inner packet */
1964 if ((eip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
1965 ++pim6stat.pim6s_rcv_badregisters;
1967 log(LOG_DEBUG, "pim6_input: invalid IP version (%d) "
1968 "of the inner packet\n",
1969 (eip6->ip6_vfc & IPV6_VERSION));
1972 return (IPPROTO_NONE);
1975 /* verify the inner packet is destined to a mcast group */
1976 if (!IN6_IS_ADDR_MULTICAST(&eip6->ip6_dst)) {
1977 ++pim6stat.pim6s_rcv_badregisters;
1979 if (V_mrt6debug & DEBUG_PIM)
1981 "pim6_input: inner packet of register "
1982 "is not multicast %s\n",
1983 ip6_sprintf(ip6bufd, &eip6->ip6_dst));
1986 return (IPPROTO_DONE);
1990 * make a copy of the whole header to pass to the daemon later.
1992 mcp = m_copy(m, 0, off + PIM6_REG_MINLEN);
1996 "pim6_input: pim register: "
1997 "could not copy register head\n");
2000 return (IPPROTO_DONE);
2004 * forward the inner ip6 packet; point m_data at the inner ip6.
2006 m_adj(m, off + PIM_MINLEN);
2008 if (V_mrt6debug & DEBUG_PIM) {
2010 "pim6_input: forwarding decapsulated register: "
2011 "src %s, dst %s, mif %d\n",
2012 ip6_sprintf(ip6bufs, &eip6->ip6_src),
2013 ip6_sprintf(ip6bufd, &eip6->ip6_dst),
2018 rc = if_simloop(mif6table[reg_mif_num].m6_ifp, m,
2019 dst.sin6_family, 0);
2021 /* prepare the register head to send to the mrouting daemon */
2026 * Pass the PIM message up to the daemon; if it is a register message
2027 * pass the 'head' only up to the daemon. This includes the
2028 * encapsulator ip6 header, pim header, register header and the
2029 * encapsulated ip6 header.
2031 pim6_input_to_daemon:
2032 rip6_input(&m, offp, proto);
2033 return (IPPROTO_DONE);
2037 ip6_mroute_modevent(module_t mod, int type, void *unused)
2042 MROUTER6_LOCK_INIT();
2046 pim6_encap_cookie = encap_attach_func(AF_INET6, IPPROTO_PIM,
2048 (const struct protosw *)&in6_pim_protosw, NULL);
2049 if (pim6_encap_cookie == NULL) {
2050 printf("ip6_mroute: unable to attach pim6 encap\n");
2051 MIF6_LOCK_DESTROY();
2052 MFC6_LOCK_DESTROY();
2053 MROUTER6_LOCK_DESTROY();
2057 ip6_mforward = X_ip6_mforward;
2058 ip6_mrouter_done = X_ip6_mrouter_done;
2059 ip6_mrouter_get = X_ip6_mrouter_get;
2060 ip6_mrouter_set = X_ip6_mrouter_set;
2061 mrt6_ioctl = X_mrt6_ioctl;
2065 if (V_ip6_mrouter != NULL)
2068 if (pim6_encap_cookie) {
2069 encap_detach(pim6_encap_cookie);
2070 pim6_encap_cookie = NULL;
2072 X_ip6_mrouter_done();
2073 ip6_mforward = NULL;
2074 ip6_mrouter_done = NULL;
2075 ip6_mrouter_get = NULL;
2076 ip6_mrouter_set = NULL;
2079 MIF6_LOCK_DESTROY();
2080 MFC6_LOCK_DESTROY();
2081 MROUTER6_LOCK_DESTROY();
2085 return (EOPNOTSUPP);
2091 static moduledata_t ip6_mroutemod = {
2093 ip6_mroute_modevent,
2097 DECLARE_MODULE(ip6_mroute, ip6_mroutemod, SI_SUB_PSEUDO, SI_ORDER_ANY);