ip6_mroute.c revision 166948
1/* $FreeBSD: head/sys/netinet6/ip6_mroute.c 166948 2007-02-24 21:09:35Z bms $ */ 2/* $KAME: ip6_mroute.c,v 1.58 2001/12/18 02:36:31 itojun Exp $ */ 3 4/*- 5 * Copyright (C) 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/* BSDI ip_mroute.c,v 2.10 1996/11/14 00:29:52 jch Exp */ 34 35/*- 36 * Copyright (c) 1989 Stephen Deering 37 * Copyright (c) 1992, 1993 38 * The Regents of the University of California. All rights reserved. 39 * 40 * This code is derived from software contributed to Berkeley by 41 * Stephen Deering of Stanford University. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 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 * 4. Neither the name of the University nor the names of its contributors 52 * may be used to endorse or promote products derived from this software 53 * without specific prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 65 * SUCH DAMAGE. 66 * 67 * @(#)ip_mroute.c 8.2 (Berkeley) 11/15/93 68 */ 69 70/* 71 * IP multicast forwarding procedures 72 * 73 * Written by David Waitzman, BBN Labs, August 1988. 74 * Modified by Steve Deering, Stanford, February 1989. 75 * Modified by Mark J. Steiglitz, Stanford, May, 1991 76 * Modified by Van Jacobson, LBL, January 1993 77 * Modified by Ajit Thyagarajan, PARC, August 1993 78 * Modified by Bill Fenner, PARC, April 1994 79 * 80 * MROUTING Revision: 3.5.1.2 + PIM-SMv2 (pimd) Support 81 */ 82 83#include "opt_inet.h" 84#include "opt_inet6.h" 85 86#include <sys/param.h> 87#include <sys/callout.h> 88#include <sys/errno.h> 89#include <sys/kernel.h> 90#include <sys/lock.h> 91#include <sys/malloc.h> 92#include <sys/mbuf.h> 93#include <sys/protosw.h> 94#include <sys/signalvar.h> 95#include <sys/socket.h> 96#include <sys/socketvar.h> 97#include <sys/sockio.h> 98#include <sys/sx.h> 99#include <sys/sysctl.h> 100#include <sys/syslog.h> 101#include <sys/systm.h> 102#include <sys/time.h> 103 104#include <net/if.h> 105#include <net/if_types.h> 106#include <net/raw_cb.h> 107#include <net/route.h> 108 109#include <netinet/in.h> 110#include <netinet/in_var.h> 111#include <netinet/icmp6.h> 112 113#include <netinet/ip6.h> 114#include <netinet6/ip6_var.h> 115#include <netinet6/scope6_var.h> 116#include <netinet6/nd6.h> 117#include <netinet6/ip6_mroute.h> 118#include <netinet6/ip6protosw.h> 119#include <netinet6/pim6.h> 120#include <netinet6/pim6_var.h> 121 122static MALLOC_DEFINE(M_MRTABLE6, "mf6c", "multicast forwarding cache entry"); 123 124#define M_HASCL(m) ((m)->m_flags & M_EXT) 125 126static int ip6_mdq __P((struct mbuf *, struct ifnet *, struct mf6c *)); 127static void phyint_send __P((struct ip6_hdr *, struct mif6 *, struct mbuf *)); 128 129static int set_pim6 __P((int *)); 130static int socket_send __P((struct socket *, struct mbuf *, 131 struct sockaddr_in6 *)); 132static int register_send __P((struct ip6_hdr *, struct mif6 *, 133 struct mbuf *)); 134 135extern struct domain inet6domain; 136struct ip6protosw in6_pim_protosw = { 137 .pr_type = SOCK_RAW, 138 .pr_domain = &inet6domain, 139 .pr_protocol = IPPROTO_PIM, 140 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 141 .pr_input = pim6_input, 142 .pr_output = rip6_output, 143 .pr_ctloutput = rip6_ctloutput, 144 .pr_usrreqs = &rip6_usrreqs 145}; 146 147/* 148 * Globals. All but ip6_mrtproto and mrt6stat could be static, 149 * except for netstat or debugging purposes. 150 */ 151int ip6_mrouter_ver = 0; 152int ip6_mrtproto = IPPROTO_PIM; /* for netstat only */ 153 154SYSCTL_DECL(_net_inet6); 155SYSCTL_DECL(_net_inet6_ip6); 156SYSCTL_NODE(_net_inet6, IPPROTO_PIM, pim, CTLFLAG_RW, 0, "PIM"); 157 158struct mrt6stat mrt6stat; 159SYSCTL_STRUCT(_net_inet6_ip6, OID_AUTO, mrt6stat, CTLFLAG_RW, 160 &mrt6stat, mrt6stat, 161 "Multicast Routing Statistics (struct mrt6stat, netinet6/ip6_mroute.h)"); 162 163#define NO_RTE_FOUND 0x1 164#define RTE_FOUND 0x2 165 166struct mf6c *mf6ctable[MF6CTBLSIZ]; 167SYSCTL_OPAQUE(_net_inet6_ip6, OID_AUTO, mf6ctable, CTLFLAG_RD, 168 &mf6ctable, sizeof(mf6ctable), "S,*mf6ctable[MF6CTBLSIZ]", 169 "Multicast Forwarding Table (struct *mf6ctable[MF6CTBLSIZ], " 170 "netinet6/ip6_mroute.h)"); 171 172u_char n6expire[MF6CTBLSIZ]; 173 174static struct mif6 mif6table[MAXMIFS]; 175SYSCTL_OPAQUE(_net_inet6_ip6, OID_AUTO, mif6table, CTLFLAG_RD, 176 &mif6table, sizeof(mif6table), "S,vif[MAXMIFS]", 177 "Multicast Interfaces (struct mif[MAXMIFS], netinet6/ip6_mroute.h)"); 178 179#ifdef MRT6DEBUG 180u_int mrt6debug = 0; /* debug level */ 181#define DEBUG_MFC 0x02 182#define DEBUG_FORWARD 0x04 183#define DEBUG_EXPIRE 0x08 184#define DEBUG_XMIT 0x10 185#define DEBUG_REG 0x20 186#define DEBUG_PIM 0x40 187#endif 188 189static void expire_upcalls __P((void *)); 190#define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */ 191#define UPCALL_EXPIRE 6 /* number of timeouts */ 192 193#ifdef INET 194#ifdef MROUTING 195extern struct socket *ip_mrouter; 196#endif 197#endif 198 199/* 200 * 'Interfaces' associated with decapsulator (so we can tell 201 * packets that went through it from ones that get reflected 202 * by a broken gateway). Different from IPv4 register_if, 203 * these interfaces are linked into the system ifnet list, 204 * because per-interface IPv6 statistics are maintained in 205 * ifp->if_afdata. But it does not have any routes point 206 * to them. I.e., packets can't be sent this way. They 207 * only exist as a placeholder for multicast source 208 * verification. 209 */ 210static struct ifnet *multicast_register_if6; 211 212#define ENCAP_HOPS 64 213 214/* 215 * Private variables. 216 */ 217static mifi_t nummifs = 0; 218static mifi_t reg_mif_num = (mifi_t)-1; 219 220static struct pim6stat pim6stat; 221SYSCTL_STRUCT(_net_inet6_pim, PIM6CTL_STATS, stats, CTLFLAG_RD, 222 &pim6stat, pim6stat, 223 "PIM Statistics (struct pim6stat, netinet6/pim_var.h)"); 224 225static int pim6; 226 227/* 228 * Hash function for a source, group entry 229 */ 230#define MF6CHASH(a, g) MF6CHASHMOD((a).s6_addr32[0] ^ (a).s6_addr32[1] ^ \ 231 (a).s6_addr32[2] ^ (a).s6_addr32[3] ^ \ 232 (g).s6_addr32[0] ^ (g).s6_addr32[1] ^ \ 233 (g).s6_addr32[2] ^ (g).s6_addr32[3]) 234 235/* 236 * Find a route for a given origin IPv6 address and Multicast group address. 237 * Quality of service parameter to be added in the future!!! 238 */ 239 240#define MF6CFIND(o, g, rt) do { \ 241 struct mf6c *_rt = mf6ctable[MF6CHASH(o,g)]; \ 242 rt = NULL; \ 243 mrt6stat.mrt6s_mfc_lookups++; \ 244 while (_rt) { \ 245 if (IN6_ARE_ADDR_EQUAL(&_rt->mf6c_origin.sin6_addr, &(o)) && \ 246 IN6_ARE_ADDR_EQUAL(&_rt->mf6c_mcastgrp.sin6_addr, &(g)) && \ 247 (_rt->mf6c_stall == NULL)) { \ 248 rt = _rt; \ 249 break; \ 250 } \ 251 _rt = _rt->mf6c_next; \ 252 } \ 253 if (rt == NULL) { \ 254 mrt6stat.mrt6s_mfc_misses++; \ 255 } \ 256} while (/*CONSTCOND*/ 0) 257 258/* 259 * Macros to compute elapsed time efficiently 260 * Borrowed from Van Jacobson's scheduling code 261 */ 262#define TV_DELTA(a, b, delta) do { \ 263 int xxs; \ 264 \ 265 delta = (a).tv_usec - (b).tv_usec; \ 266 if ((xxs = (a).tv_sec - (b).tv_sec)) { \ 267 switch (xxs) { \ 268 case 2: \ 269 delta += 1000000; \ 270 /* FALLTHROUGH */ \ 271 case 1: \ 272 delta += 1000000; \ 273 break; \ 274 default: \ 275 delta += (1000000 * xxs); \ 276 } \ 277 } \ 278} while (/*CONSTCOND*/ 0) 279 280#define TV_LT(a, b) (((a).tv_usec < (b).tv_usec && \ 281 (a).tv_sec <= (b).tv_sec) || (a).tv_sec < (b).tv_sec) 282 283#ifdef UPCALL_TIMING 284#define UPCALL_MAX 50 285u_long upcall_data[UPCALL_MAX + 1]; 286static void collate(); 287#endif /* UPCALL_TIMING */ 288 289static int get_sg_cnt __P((struct sioc_sg_req6 *)); 290static int get_mif6_cnt __P((struct sioc_mif_req6 *)); 291static int ip6_mrouter_init __P((struct socket *, int, int)); 292static int add_m6if __P((struct mif6ctl *)); 293static int del_m6if __P((mifi_t *)); 294static int add_m6fc __P((struct mf6cctl *)); 295static int del_m6fc __P((struct mf6cctl *)); 296 297static struct callout expire_upcalls_ch; 298 299int X_ip6_mforward(struct ip6_hdr *ip6, struct ifnet *ifp, struct mbuf *m); 300int X_ip6_mrouter_done(void); 301int X_ip6_mrouter_set(struct socket *so, struct sockopt *sopt); 302int X_ip6_mrouter_get(struct socket *so, struct sockopt *sopt); 303int X_mrt6_ioctl(int cmd, caddr_t data); 304 305/* 306 * Handle MRT setsockopt commands to modify the multicast routing tables. 307 */ 308int 309X_ip6_mrouter_set(struct socket *so, struct sockopt *sopt) 310{ 311 int error = 0; 312 int optval; 313 struct mif6ctl mifc; 314 struct mf6cctl mfcc; 315 mifi_t mifi; 316 317 if (so != ip6_mrouter && sopt->sopt_name != MRT6_INIT) 318 return (EACCES); 319 320 switch (sopt->sopt_name) { 321 case MRT6_INIT: 322#ifdef MRT6_OINIT 323 case MRT6_OINIT: 324#endif 325 error = sooptcopyin(sopt, &optval, sizeof(optval), 326 sizeof(optval)); 327 if (error) 328 break; 329 error = ip6_mrouter_init(so, optval, sopt->sopt_name); 330 break; 331 case MRT6_DONE: 332 error = X_ip6_mrouter_done(); 333 break; 334 case MRT6_ADD_MIF: 335 error = sooptcopyin(sopt, &mifc, sizeof(mifc), sizeof(mifc)); 336 if (error) 337 break; 338 error = add_m6if(&mifc); 339 break; 340 case MRT6_ADD_MFC: 341 error = sooptcopyin(sopt, &mfcc, sizeof(mfcc), sizeof(mfcc)); 342 if (error) 343 break; 344 error = add_m6fc(&mfcc); 345 break; 346 case MRT6_DEL_MFC: 347 error = sooptcopyin(sopt, &mfcc, sizeof(mfcc), sizeof(mfcc)); 348 if (error) 349 break; 350 error = del_m6fc(&mfcc); 351 break; 352 case MRT6_DEL_MIF: 353 error = sooptcopyin(sopt, &mifi, sizeof(mifi), sizeof(mifi)); 354 if (error) 355 break; 356 error = del_m6if(&mifi); 357 break; 358 case MRT6_PIM: 359 error = sooptcopyin(sopt, &optval, sizeof(optval), 360 sizeof(optval)); 361 if (error) 362 break; 363 error = set_pim6(&optval); 364 break; 365 default: 366 error = EOPNOTSUPP; 367 break; 368 } 369 370 return (error); 371} 372 373/* 374 * Handle MRT getsockopt commands 375 */ 376int 377X_ip6_mrouter_get(struct socket *so, struct sockopt *sopt) 378{ 379 int error = 0; 380 381 if (so != ip6_mrouter) 382 return (EACCES); 383 384 switch (sopt->sopt_name) { 385 case MRT6_PIM: 386 error = sooptcopyout(sopt, &pim6, sizeof(pim6)); 387 break; 388 } 389 return (error); 390} 391 392/* 393 * Handle ioctl commands to obtain information from the cache 394 */ 395int 396X_mrt6_ioctl(int cmd, caddr_t data) 397{ 398 switch (cmd) { 399 case SIOCGETSGCNT_IN6: 400 return (get_sg_cnt((struct sioc_sg_req6 *)data)); 401 case SIOCGETMIFCNT_IN6: 402 return (get_mif6_cnt((struct sioc_mif_req6 *)data)); 403 default: 404 return (EINVAL); 405 } 406} 407 408/* 409 * returns the packet, byte, rpf-failure count for the source group provided 410 */ 411static int 412get_sg_cnt(req) 413 struct sioc_sg_req6 *req; 414{ 415 struct mf6c *rt; 416 int s; 417 418 s = splnet(); 419 MF6CFIND(req->src.sin6_addr, req->grp.sin6_addr, rt); 420 splx(s); 421 if (rt != NULL) { 422 req->pktcnt = rt->mf6c_pkt_cnt; 423 req->bytecnt = rt->mf6c_byte_cnt; 424 req->wrong_if = rt->mf6c_wrong_if; 425 } else 426 return (ESRCH); 427#if 0 428 req->pktcnt = req->bytecnt = req->wrong_if = 0xffffffff; 429#endif 430 431 return (0); 432} 433 434/* 435 * returns the input and output packet and byte counts on the mif provided 436 */ 437static int 438get_mif6_cnt(req) 439 struct sioc_mif_req6 *req; 440{ 441 mifi_t mifi = req->mifi; 442 443 if (mifi >= nummifs) 444 return (EINVAL); 445 446 req->icount = mif6table[mifi].m6_pkt_in; 447 req->ocount = mif6table[mifi].m6_pkt_out; 448 req->ibytes = mif6table[mifi].m6_bytes_in; 449 req->obytes = mif6table[mifi].m6_bytes_out; 450 451 return (0); 452} 453 454static int 455set_pim6(i) 456 int *i; 457{ 458 if ((*i != 1) && (*i != 0)) 459 return (EINVAL); 460 461 pim6 = *i; 462 463 return (0); 464} 465 466/* 467 * Enable multicast routing 468 */ 469static int 470ip6_mrouter_init(so, v, cmd) 471 struct socket *so; 472 int v; 473 int cmd; 474{ 475#ifdef MRT6DEBUG 476 if (mrt6debug) 477 log(LOG_DEBUG, 478 "ip6_mrouter_init: so_type = %d, pr_protocol = %d\n", 479 so->so_type, so->so_proto->pr_protocol); 480#endif 481 482 if (so->so_type != SOCK_RAW || 483 so->so_proto->pr_protocol != IPPROTO_ICMPV6) 484 return (EOPNOTSUPP); 485 486 if (v != 1) 487 return (ENOPROTOOPT); 488 489 if (ip6_mrouter != NULL) 490 return (EADDRINUSE); 491 492 ip6_mrouter = so; 493 ip6_mrouter_ver = cmd; 494 495 bzero((caddr_t)mf6ctable, sizeof(mf6ctable)); 496 bzero((caddr_t)n6expire, sizeof(n6expire)); 497 498 pim6 = 0;/* used for stubbing out/in pim stuff */ 499 500 callout_init(&expire_upcalls_ch, 0); 501 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 502 expire_upcalls, NULL); 503 504#ifdef MRT6DEBUG 505 if (mrt6debug) 506 log(LOG_DEBUG, "ip6_mrouter_init\n"); 507#endif 508 509 return (0); 510} 511 512/* 513 * Disable multicast routing 514 */ 515int 516X_ip6_mrouter_done(void) 517{ 518 mifi_t mifi; 519 int i; 520 struct mf6c *rt; 521 struct rtdetq *rte; 522 int s; 523 524 s = splnet(); 525 526 /* 527 * For each phyint in use, disable promiscuous reception of all IPv6 528 * multicasts. 529 */ 530#ifdef INET 531#ifdef MROUTING 532 /* 533 * If there is still IPv4 multicast routing daemon, 534 * we remain interfaces to receive all muliticasted packets. 535 * XXX: there may be an interface in which the IPv4 multicast 536 * daemon is not interested... 537 */ 538 if (!ip_mrouter) 539#endif 540#endif 541 { 542 for (mifi = 0; mifi < nummifs; mifi++) { 543 if (mif6table[mifi].m6_ifp && 544 !(mif6table[mifi].m6_flags & MIFF_REGISTER)) { 545 if_allmulti(mif6table[mifi].m6_ifp, 0); 546 } 547 } 548 } 549#ifdef notyet 550 bzero((caddr_t)qtable, sizeof(qtable)); 551 bzero((caddr_t)tbftable, sizeof(tbftable)); 552#endif 553 bzero((caddr_t)mif6table, sizeof(mif6table)); 554 nummifs = 0; 555 556 pim6 = 0; /* used to stub out/in pim specific code */ 557 558 callout_stop(&expire_upcalls_ch); 559 560 /* 561 * Free all multicast forwarding cache entries. 562 */ 563 for (i = 0; i < MF6CTBLSIZ; i++) { 564 rt = mf6ctable[i]; 565 while (rt) { 566 struct mf6c *frt; 567 568 for (rte = rt->mf6c_stall; rte != NULL; ) { 569 struct rtdetq *n = rte->next; 570 571 m_free(rte->m); 572 free(rte, M_MRTABLE6); 573 rte = n; 574 } 575 frt = rt; 576 rt = rt->mf6c_next; 577 free(frt, M_MRTABLE6); 578 } 579 } 580 581 bzero((caddr_t)mf6ctable, sizeof(mf6ctable)); 582 583 /* 584 * Reset register interface 585 */ 586 if (reg_mif_num != (mifi_t)-1 && multicast_register_if6 != NULL) { 587 if_detach(multicast_register_if6); 588 if_free(multicast_register_if6); 589 reg_mif_num = (mifi_t)-1; 590 multicast_register_if6 = NULL; 591 } 592 593 ip6_mrouter = NULL; 594 ip6_mrouter_ver = 0; 595 596 splx(s); 597 598#ifdef MRT6DEBUG 599 if (mrt6debug) 600 log(LOG_DEBUG, "ip6_mrouter_done\n"); 601#endif 602 603 return (0); 604} 605 606static struct sockaddr_in6 sin6 = { sizeof(sin6), AF_INET6 }; 607 608/* 609 * Add a mif to the mif table 610 */ 611static int 612add_m6if(mifcp) 613 struct mif6ctl *mifcp; 614{ 615 struct mif6 *mifp; 616 struct ifnet *ifp; 617 int error, s; 618#ifdef notyet 619 struct tbf *m_tbf = tbftable + mifcp->mif6c_mifi; 620#endif 621 622 if (mifcp->mif6c_mifi >= MAXMIFS) 623 return (EINVAL); 624 mifp = mif6table + mifcp->mif6c_mifi; 625 if (mifp->m6_ifp) 626 return (EADDRINUSE); /* XXX: is it appropriate? */ 627 if (mifcp->mif6c_pifi == 0 || mifcp->mif6c_pifi > if_index) 628 return (ENXIO); 629 ifp = ifnet_byindex(mifcp->mif6c_pifi); 630 631 if (mifcp->mif6c_flags & MIFF_REGISTER) { 632 if (reg_mif_num == (mifi_t)-1) { 633 ifp = if_alloc(IFT_OTHER); 634 635 if_initname(ifp, "register_mif", 0); 636 ifp->if_flags |= IFF_LOOPBACK; 637 if_attach(ifp); 638 multicast_register_if6 = ifp; 639 reg_mif_num = mifcp->mif6c_mifi; 640 /* 641 * it is impossible to guess the ifindex of the 642 * register interface. So mif6c_pifi is automatically 643 * calculated. 644 */ 645 mifcp->mif6c_pifi = ifp->if_index; 646 } else { 647 ifp = multicast_register_if6; 648 } 649 650 } /* if REGISTER */ 651 else { 652 /* Make sure the interface supports multicast */ 653 if ((ifp->if_flags & IFF_MULTICAST) == 0) 654 return (EOPNOTSUPP); 655 656 s = splnet(); 657 error = if_allmulti(ifp, 1); 658 splx(s); 659 if (error) 660 return (error); 661 } 662 663 s = splnet(); 664 mifp->m6_flags = mifcp->mif6c_flags; 665 mifp->m6_ifp = ifp; 666#ifdef notyet 667 /* scaling up here allows division by 1024 in critical code */ 668 mifp->m6_rate_limit = mifcp->mif6c_rate_limit * 1024 / 1000; 669#endif 670 /* initialize per mif pkt counters */ 671 mifp->m6_pkt_in = 0; 672 mifp->m6_pkt_out = 0; 673 mifp->m6_bytes_in = 0; 674 mifp->m6_bytes_out = 0; 675 splx(s); 676 677 /* Adjust nummifs up if the mifi is higher than nummifs */ 678 if (nummifs <= mifcp->mif6c_mifi) 679 nummifs = mifcp->mif6c_mifi + 1; 680 681#ifdef MRT6DEBUG 682 if (mrt6debug) 683 log(LOG_DEBUG, 684 "add_mif #%d, phyint %s\n", 685 mifcp->mif6c_mifi, 686 ifp->if_xname); 687#endif 688 689 return (0); 690} 691 692/* 693 * Delete a mif from the mif table 694 */ 695static int 696del_m6if(mifip) 697 mifi_t *mifip; 698{ 699 struct mif6 *mifp = mif6table + *mifip; 700 mifi_t mifi; 701 struct ifnet *ifp; 702 int s; 703 704 if (*mifip >= nummifs) 705 return (EINVAL); 706 if (mifp->m6_ifp == NULL) 707 return (EINVAL); 708 709 s = splnet(); 710 711 if (!(mifp->m6_flags & MIFF_REGISTER)) { 712 /* 713 * XXX: what if there is yet IPv4 multicast daemon 714 * using the interface? 715 */ 716 ifp = mifp->m6_ifp; 717 718 if_allmulti(ifp, 0); 719 } else { 720 if (reg_mif_num != (mifi_t)-1 && 721 multicast_register_if6 != NULL) { 722 if_detach(multicast_register_if6); 723 if_free(multicast_register_if6); 724 reg_mif_num = (mifi_t)-1; 725 multicast_register_if6 = NULL; 726 } 727 } 728 729#ifdef notyet 730 bzero((caddr_t)qtable[*mifip], sizeof(qtable[*mifip])); 731 bzero((caddr_t)mifp->m6_tbf, sizeof(*(mifp->m6_tbf))); 732#endif 733 bzero((caddr_t)mifp, sizeof(*mifp)); 734 735 /* Adjust nummifs down */ 736 for (mifi = nummifs; mifi > 0; mifi--) 737 if (mif6table[mifi - 1].m6_ifp) 738 break; 739 nummifs = mifi; 740 741 splx(s); 742 743#ifdef MRT6DEBUG 744 if (mrt6debug) 745 log(LOG_DEBUG, "del_m6if %d, nummifs %d\n", *mifip, nummifs); 746#endif 747 748 return (0); 749} 750 751/* 752 * Add an mfc entry 753 */ 754static int 755add_m6fc(mfccp) 756 struct mf6cctl *mfccp; 757{ 758 struct mf6c *rt; 759 u_long hash; 760 struct rtdetq *rte; 761 u_short nstl; 762 int s; 763 char ip6bufo[INET6_ADDRSTRLEN], ip6bufg[INET6_ADDRSTRLEN]; 764 765 MF6CFIND(mfccp->mf6cc_origin.sin6_addr, 766 mfccp->mf6cc_mcastgrp.sin6_addr, rt); 767 768 /* If an entry already exists, just update the fields */ 769 if (rt) { 770#ifdef MRT6DEBUG 771 if (mrt6debug & DEBUG_MFC) { 772 log(LOG_DEBUG, 773 "add_m6fc no upcall h %d o %s g %s p %x\n", 774 ip6_sprintf(ip6bufo, &mfccp->mf6cc_origin.sin6_addr), 775 ip6_sprintf(ip6bufg, &mfccp->mf6cc_mcastgrp.sin6_addr), 776 mfccp->mf6cc_parent); 777 } 778#endif 779 780 s = splnet(); 781 rt->mf6c_parent = mfccp->mf6cc_parent; 782 rt->mf6c_ifset = mfccp->mf6cc_ifset; 783 splx(s); 784 return (0); 785 } 786 787 /* 788 * Find the entry for which the upcall was made and update 789 */ 790 s = splnet(); 791 hash = MF6CHASH(mfccp->mf6cc_origin.sin6_addr, 792 mfccp->mf6cc_mcastgrp.sin6_addr); 793 for (rt = mf6ctable[hash], nstl = 0; rt; rt = rt->mf6c_next) { 794 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 795 &mfccp->mf6cc_origin.sin6_addr) && 796 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 797 &mfccp->mf6cc_mcastgrp.sin6_addr) && 798 (rt->mf6c_stall != NULL)) { 799 800 if (nstl++) 801 log(LOG_ERR, 802 "add_m6fc: %s o %s g %s p %x dbx %p\n", 803 "multiple kernel entries", 804 ip6_sprintf(ip6bufo, 805 &mfccp->mf6cc_origin.sin6_addr), 806 ip6_sprintf(ip6bufg, 807 &mfccp->mf6cc_mcastgrp.sin6_addr), 808 mfccp->mf6cc_parent, rt->mf6c_stall); 809 810#ifdef MRT6DEBUG 811 if (mrt6debug & DEBUG_MFC) 812 log(LOG_DEBUG, 813 "add_m6fc o %s g %s p %x dbg %x\n", 814 ip6_sprintf(ip6bufo, 815 &mfccp->mf6cc_origin.sin6_addr), 816 ip6_sprintf(ip6bufg, 817 &mfccp->mf6cc_mcastgrp.sin6_addr), 818 mfccp->mf6cc_parent, rt->mf6c_stall); 819#endif 820 821 rt->mf6c_origin = mfccp->mf6cc_origin; 822 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 823 rt->mf6c_parent = mfccp->mf6cc_parent; 824 rt->mf6c_ifset = mfccp->mf6cc_ifset; 825 /* initialize pkt counters per src-grp */ 826 rt->mf6c_pkt_cnt = 0; 827 rt->mf6c_byte_cnt = 0; 828 rt->mf6c_wrong_if = 0; 829 830 rt->mf6c_expire = 0; /* Don't clean this guy up */ 831 n6expire[hash]--; 832 833 /* free packets Qed at the end of this entry */ 834 for (rte = rt->mf6c_stall; rte != NULL; ) { 835 struct rtdetq *n = rte->next; 836 ip6_mdq(rte->m, rte->ifp, rt); 837 m_freem(rte->m); 838#ifdef UPCALL_TIMING 839 collate(&(rte->t)); 840#endif /* UPCALL_TIMING */ 841 free(rte, M_MRTABLE6); 842 rte = n; 843 } 844 rt->mf6c_stall = NULL; 845 } 846 } 847 848 /* 849 * It is possible that an entry is being inserted without an upcall 850 */ 851 if (nstl == 0) { 852#ifdef MRT6DEBUG 853 if (mrt6debug & DEBUG_MFC) 854 log(LOG_DEBUG, 855 "add_mfc no upcall h %d o %s g %s p %x\n", 856 hash, 857 ip6_sprintf(ip6bufo, &mfccp->mf6cc_origin.sin6_addr), 858 ip6_sprintf(ip6bufg, &mfccp->mf6cc_mcastgrp.sin6_addr), 859 mfccp->mf6cc_parent); 860#endif 861 862 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 863 864 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 865 &mfccp->mf6cc_origin.sin6_addr)&& 866 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 867 &mfccp->mf6cc_mcastgrp.sin6_addr)) { 868 869 rt->mf6c_origin = mfccp->mf6cc_origin; 870 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 871 rt->mf6c_parent = mfccp->mf6cc_parent; 872 rt->mf6c_ifset = mfccp->mf6cc_ifset; 873 /* initialize pkt counters per src-grp */ 874 rt->mf6c_pkt_cnt = 0; 875 rt->mf6c_byte_cnt = 0; 876 rt->mf6c_wrong_if = 0; 877 878 if (rt->mf6c_expire) 879 n6expire[hash]--; 880 rt->mf6c_expire = 0; 881 } 882 } 883 if (rt == NULL) { 884 /* no upcall, so make a new entry */ 885 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE6, 886 M_NOWAIT); 887 if (rt == NULL) { 888 splx(s); 889 return (ENOBUFS); 890 } 891 892 /* insert new entry at head of hash chain */ 893 rt->mf6c_origin = mfccp->mf6cc_origin; 894 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 895 rt->mf6c_parent = mfccp->mf6cc_parent; 896 rt->mf6c_ifset = mfccp->mf6cc_ifset; 897 /* initialize pkt counters per src-grp */ 898 rt->mf6c_pkt_cnt = 0; 899 rt->mf6c_byte_cnt = 0; 900 rt->mf6c_wrong_if = 0; 901 rt->mf6c_expire = 0; 902 rt->mf6c_stall = NULL; 903 904 /* link into table */ 905 rt->mf6c_next = mf6ctable[hash]; 906 mf6ctable[hash] = rt; 907 } 908 } 909 splx(s); 910 return (0); 911} 912 913#ifdef UPCALL_TIMING 914/* 915 * collect delay statistics on the upcalls 916 */ 917static void 918collate(t) 919 struct timeval *t; 920{ 921 u_long d; 922 struct timeval tp; 923 u_long delta; 924 925 GET_TIME(tp); 926 927 if (TV_LT(*t, tp)) 928 { 929 TV_DELTA(tp, *t, delta); 930 931 d = delta >> 10; 932 if (d > UPCALL_MAX) 933 d = UPCALL_MAX; 934 935 ++upcall_data[d]; 936 } 937} 938#endif /* UPCALL_TIMING */ 939 940/* 941 * Delete an mfc entry 942 */ 943static int 944del_m6fc(mfccp) 945 struct mf6cctl *mfccp; 946{ 947 struct sockaddr_in6 origin; 948 struct sockaddr_in6 mcastgrp; 949 struct mf6c *rt; 950 struct mf6c **nptr; 951 u_long hash; 952 int s; 953 954 origin = mfccp->mf6cc_origin; 955 mcastgrp = mfccp->mf6cc_mcastgrp; 956 hash = MF6CHASH(origin.sin6_addr, mcastgrp.sin6_addr); 957 958#ifdef MRT6DEBUG 959 if (mrt6debug & DEBUG_MFC) { 960 char ip6bufo[INET6_ADDRSTRLEN], ip6bufg[INET6_ADDRSTRLEN]; 961 log(LOG_DEBUG,"del_m6fc orig %s mcastgrp %s\n", 962 ip6_sprintf(ip6bufo, &origin.sin6_addr), 963 ip6_sprintf(ip6bufg, &mcastgrp.sin6_addr)); 964 } 965#endif 966 967 s = splnet(); 968 969 nptr = &mf6ctable[hash]; 970 while ((rt = *nptr) != NULL) { 971 if (IN6_ARE_ADDR_EQUAL(&origin.sin6_addr, 972 &rt->mf6c_origin.sin6_addr) && 973 IN6_ARE_ADDR_EQUAL(&mcastgrp.sin6_addr, 974 &rt->mf6c_mcastgrp.sin6_addr) && 975 rt->mf6c_stall == NULL) 976 break; 977 978 nptr = &rt->mf6c_next; 979 } 980 if (rt == NULL) { 981 splx(s); 982 return (EADDRNOTAVAIL); 983 } 984 985 *nptr = rt->mf6c_next; 986 free(rt, M_MRTABLE6); 987 988 splx(s); 989 990 return (0); 991} 992 993static int 994socket_send(s, mm, src) 995 struct socket *s; 996 struct mbuf *mm; 997 struct sockaddr_in6 *src; 998{ 999 if (s) { 1000 if (sbappendaddr(&s->so_rcv, 1001 (struct sockaddr *)src, 1002 mm, (struct mbuf *)0) != 0) { 1003 sorwakeup(s); 1004 return (0); 1005 } 1006 } 1007 m_freem(mm); 1008 return (-1); 1009} 1010 1011/* 1012 * IPv6 multicast forwarding function. This function assumes that the packet 1013 * pointed to by "ip6" has arrived on (or is about to be sent to) the interface 1014 * pointed to by "ifp", and the packet is to be relayed to other networks 1015 * that have members of the packet's destination IPv6 multicast group. 1016 * 1017 * The packet is returned unscathed to the caller, unless it is 1018 * erroneous, in which case a non-zero return value tells the caller to 1019 * discard it. 1020 * 1021 * NOTE: this implementation assumes that m->m_pkthdr.rcvif is NULL iff 1022 * this function is called in the originating context (i.e., not when 1023 * forwarding a packet from other node). ip6_output(), which is currently the 1024 * only function that calls this function is called in the originating context, 1025 * explicitly ensures this condition. It is caller's responsibility to ensure 1026 * that if this function is called from somewhere else in the originating 1027 * context in the future. 1028 */ 1029 1030int 1031X_ip6_mforward(struct ip6_hdr *ip6, struct ifnet *ifp, struct mbuf *m) 1032{ 1033 struct mf6c *rt; 1034 struct mif6 *mifp; 1035 struct mbuf *mm; 1036 int s; 1037 mifi_t mifi; 1038 char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN]; 1039 1040#ifdef MRT6DEBUG 1041 if (mrt6debug & DEBUG_FORWARD) 1042 log(LOG_DEBUG, "ip6_mforward: src %s, dst %s, ifindex %d\n", 1043 ip6_sprintf(ip6bufs, &ip6->ip6_src), 1044 ip6_sprintf(ip6bufd, &ip6->ip6_dst), 1045 ifp->if_index); 1046#endif 1047 1048 /* 1049 * Don't forward a packet with Hop limit of zero or one, 1050 * or a packet destined to a local-only group. 1051 */ 1052 if (ip6->ip6_hlim <= 1 || IN6_IS_ADDR_MC_INTFACELOCAL(&ip6->ip6_dst) || 1053 IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst)) 1054 return (0); 1055 ip6->ip6_hlim--; 1056 1057 /* 1058 * Source address check: do not forward packets with unspecified 1059 * source. It was discussed in July 2000, on ipngwg mailing list. 1060 * This is rather more serious than unicast cases, because some 1061 * MLD packets can be sent with the unspecified source address 1062 * (although such packets must normally set 1 to the hop limit field). 1063 */ 1064 if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) { 1065 ip6stat.ip6s_cantforward++; 1066 if (ip6_log_time + ip6_log_interval < time_second) { 1067 ip6_log_time = time_second; 1068 log(LOG_DEBUG, 1069 "cannot forward " 1070 "from %s to %s nxt %d received on %s\n", 1071 ip6_sprintf(ip6bufs, &ip6->ip6_src), 1072 ip6_sprintf(ip6bufd, &ip6->ip6_dst), 1073 ip6->ip6_nxt, 1074 if_name(m->m_pkthdr.rcvif)); 1075 } 1076 return (0); 1077 } 1078 1079 /* 1080 * Determine forwarding mifs from the forwarding cache table 1081 */ 1082 s = splnet(); 1083 MF6CFIND(ip6->ip6_src, ip6->ip6_dst, rt); 1084 1085 /* Entry exists, so forward if necessary */ 1086 if (rt) { 1087 splx(s); 1088 return (ip6_mdq(m, ifp, rt)); 1089 } else { 1090 /* 1091 * If we don't have a route for packet's origin, 1092 * Make a copy of the packet & 1093 * send message to routing daemon 1094 */ 1095 1096 struct mbuf *mb0; 1097 struct rtdetq *rte; 1098 u_long hash; 1099/* int i, npkts;*/ 1100#ifdef UPCALL_TIMING 1101 struct timeval tp; 1102 1103 GET_TIME(tp); 1104#endif /* UPCALL_TIMING */ 1105 1106 mrt6stat.mrt6s_no_route++; 1107#ifdef MRT6DEBUG 1108 if (mrt6debug & (DEBUG_FORWARD | DEBUG_MFC)) 1109 log(LOG_DEBUG, "ip6_mforward: no rte s %s g %s\n", 1110 ip6_sprintf(ip6bufs, &ip6->ip6_src), 1111 ip6_sprintf(ip6bufd, &ip6->ip6_dst)); 1112#endif 1113 1114 /* 1115 * Allocate mbufs early so that we don't do extra work if we 1116 * are just going to fail anyway. 1117 */ 1118 rte = (struct rtdetq *)malloc(sizeof(*rte), M_MRTABLE6, 1119 M_NOWAIT); 1120 if (rte == NULL) { 1121 splx(s); 1122 return (ENOBUFS); 1123 } 1124 mb0 = m_copy(m, 0, M_COPYALL); 1125 /* 1126 * Pullup packet header if needed before storing it, 1127 * as other references may modify it in the meantime. 1128 */ 1129 if (mb0 && 1130 (M_HASCL(mb0) || mb0->m_len < sizeof(struct ip6_hdr))) 1131 mb0 = m_pullup(mb0, sizeof(struct ip6_hdr)); 1132 if (mb0 == NULL) { 1133 free(rte, M_MRTABLE6); 1134 splx(s); 1135 return (ENOBUFS); 1136 } 1137 1138 /* is there an upcall waiting for this packet? */ 1139 hash = MF6CHASH(ip6->ip6_src, ip6->ip6_dst); 1140 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 1141 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, 1142 &rt->mf6c_origin.sin6_addr) && 1143 IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, 1144 &rt->mf6c_mcastgrp.sin6_addr) && 1145 (rt->mf6c_stall != NULL)) 1146 break; 1147 } 1148 1149 if (rt == NULL) { 1150 struct mrt6msg *im; 1151#ifdef MRT6_OINIT 1152 struct omrt6msg *oim; 1153#endif 1154 1155 /* no upcall, so make a new entry */ 1156 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE6, 1157 M_NOWAIT); 1158 if (rt == NULL) { 1159 free(rte, M_MRTABLE6); 1160 m_freem(mb0); 1161 splx(s); 1162 return (ENOBUFS); 1163 } 1164 /* 1165 * Make a copy of the header to send to the user 1166 * level process 1167 */ 1168 mm = m_copy(mb0, 0, sizeof(struct ip6_hdr)); 1169 1170 if (mm == NULL) { 1171 free(rte, M_MRTABLE6); 1172 m_freem(mb0); 1173 free(rt, M_MRTABLE6); 1174 splx(s); 1175 return (ENOBUFS); 1176 } 1177 1178 /* 1179 * Send message to routing daemon 1180 */ 1181 sin6.sin6_addr = ip6->ip6_src; 1182 1183 im = NULL; 1184#ifdef MRT6_OINIT 1185 oim = NULL; 1186#endif 1187 switch (ip6_mrouter_ver) { 1188#ifdef MRT6_OINIT 1189 case MRT6_OINIT: 1190 oim = mtod(mm, struct omrt6msg *); 1191 oim->im6_msgtype = MRT6MSG_NOCACHE; 1192 oim->im6_mbz = 0; 1193 break; 1194#endif 1195 case MRT6_INIT: 1196 im = mtod(mm, struct mrt6msg *); 1197 im->im6_msgtype = MRT6MSG_NOCACHE; 1198 im->im6_mbz = 0; 1199 break; 1200 default: 1201 free(rte, M_MRTABLE6); 1202 m_freem(mb0); 1203 free(rt, M_MRTABLE6); 1204 splx(s); 1205 return (EINVAL); 1206 } 1207 1208#ifdef MRT6DEBUG 1209 if (mrt6debug & DEBUG_FORWARD) 1210 log(LOG_DEBUG, 1211 "getting the iif info in the kernel\n"); 1212#endif 1213 1214 for (mifp = mif6table, mifi = 0; 1215 mifi < nummifs && mifp->m6_ifp != ifp; 1216 mifp++, mifi++) 1217 ; 1218 1219 switch (ip6_mrouter_ver) { 1220#ifdef MRT6_OINIT 1221 case MRT6_OINIT: 1222 oim->im6_mif = mifi; 1223 break; 1224#endif 1225 case MRT6_INIT: 1226 im->im6_mif = mifi; 1227 break; 1228 } 1229 1230 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1231 log(LOG_WARNING, "ip6_mforward: ip6_mrouter " 1232 "socket queue full\n"); 1233 mrt6stat.mrt6s_upq_sockfull++; 1234 free(rte, M_MRTABLE6); 1235 m_freem(mb0); 1236 free(rt, M_MRTABLE6); 1237 splx(s); 1238 return (ENOBUFS); 1239 } 1240 1241 mrt6stat.mrt6s_upcalls++; 1242 1243 /* insert new entry at head of hash chain */ 1244 bzero(rt, sizeof(*rt)); 1245 rt->mf6c_origin.sin6_family = AF_INET6; 1246 rt->mf6c_origin.sin6_len = sizeof(struct sockaddr_in6); 1247 rt->mf6c_origin.sin6_addr = ip6->ip6_src; 1248 rt->mf6c_mcastgrp.sin6_family = AF_INET6; 1249 rt->mf6c_mcastgrp.sin6_len = sizeof(struct sockaddr_in6); 1250 rt->mf6c_mcastgrp.sin6_addr = ip6->ip6_dst; 1251 rt->mf6c_expire = UPCALL_EXPIRE; 1252 n6expire[hash]++; 1253 rt->mf6c_parent = MF6C_INCOMPLETE_PARENT; 1254 1255 /* link into table */ 1256 rt->mf6c_next = mf6ctable[hash]; 1257 mf6ctable[hash] = rt; 1258 /* Add this entry to the end of the queue */ 1259 rt->mf6c_stall = rte; 1260 } else { 1261 /* determine if q has overflowed */ 1262 struct rtdetq **p; 1263 int npkts = 0; 1264 1265 for (p = &rt->mf6c_stall; *p != NULL; p = &(*p)->next) 1266 if (++npkts > MAX_UPQ6) { 1267 mrt6stat.mrt6s_upq_ovflw++; 1268 free(rte, M_MRTABLE6); 1269 m_freem(mb0); 1270 splx(s); 1271 return (0); 1272 } 1273 1274 /* Add this entry to the end of the queue */ 1275 *p = rte; 1276 } 1277 1278 rte->next = NULL; 1279 rte->m = mb0; 1280 rte->ifp = ifp; 1281#ifdef UPCALL_TIMING 1282 rte->t = tp; 1283#endif /* UPCALL_TIMING */ 1284 1285 splx(s); 1286 1287 return (0); 1288 } 1289} 1290 1291/* 1292 * Clean up cache entries if upcalls are not serviced 1293 * Call from the Slow Timeout mechanism, every half second. 1294 */ 1295static void 1296expire_upcalls(unused) 1297 void *unused; 1298{ 1299 struct rtdetq *rte; 1300 struct mf6c *mfc, **nptr; 1301 int i; 1302 int s; 1303 1304 s = splnet(); 1305 for (i = 0; i < MF6CTBLSIZ; i++) { 1306 if (n6expire[i] == 0) 1307 continue; 1308 nptr = &mf6ctable[i]; 1309 while ((mfc = *nptr) != NULL) { 1310 rte = mfc->mf6c_stall; 1311 /* 1312 * Skip real cache entries 1313 * Make sure it wasn't marked to not expire (shouldn't happen) 1314 * If it expires now 1315 */ 1316 if (rte != NULL && 1317 mfc->mf6c_expire != 0 && 1318 --mfc->mf6c_expire == 0) { 1319#ifdef MRT6DEBUG 1320 if (mrt6debug & DEBUG_EXPIRE) { 1321 char ip6bufo[INET6_ADDRSTRLEN]; 1322 char ip6bufg[INET6_ADDRSTRLEN]; 1323 log(LOG_DEBUG, "expire_upcalls: expiring (%s %s)\n", 1324 ip6_sprintf(ip6bufo, &mfc->mf6c_origin.sin6_addr), 1325 ip6_sprintf(ip6bufg, &mfc->mf6c_mcastgrp.sin6_addr)); 1326 } 1327#endif 1328 /* 1329 * drop all the packets 1330 * free the mbuf with the pkt, if, timing info 1331 */ 1332 do { 1333 struct rtdetq *n = rte->next; 1334 m_freem(rte->m); 1335 free(rte, M_MRTABLE6); 1336 rte = n; 1337 } while (rte != NULL); 1338 mrt6stat.mrt6s_cache_cleanups++; 1339 n6expire[i]--; 1340 1341 *nptr = mfc->mf6c_next; 1342 free(mfc, M_MRTABLE6); 1343 } else { 1344 nptr = &mfc->mf6c_next; 1345 } 1346 } 1347 } 1348 splx(s); 1349 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 1350 expire_upcalls, NULL); 1351} 1352 1353/* 1354 * Packet forwarding routine once entry in the cache is made 1355 */ 1356static int 1357ip6_mdq(m, ifp, rt) 1358 struct mbuf *m; 1359 struct ifnet *ifp; 1360 struct mf6c *rt; 1361{ 1362 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 1363 mifi_t mifi, iif; 1364 struct mif6 *mifp; 1365 int plen = m->m_pkthdr.len; 1366 struct in6_addr src0, dst0; /* copies for local work */ 1367 u_int32_t iszone, idzone, oszone, odzone; 1368 int error = 0; 1369 1370/* 1371 * Macro to send packet on mif. Since RSVP packets don't get counted on 1372 * input, they shouldn't get counted on output, so statistics keeping is 1373 * separate. 1374 */ 1375 1376#define MC6_SEND(ip6, mifp, m) do { \ 1377 if ((mifp)->m6_flags & MIFF_REGISTER) \ 1378 register_send((ip6), (mifp), (m)); \ 1379 else \ 1380 phyint_send((ip6), (mifp), (m)); \ 1381} while (/*CONSTCOND*/ 0) 1382 1383 /* 1384 * Don't forward if it didn't arrive from the parent mif 1385 * for its origin. 1386 */ 1387 mifi = rt->mf6c_parent; 1388 if ((mifi >= nummifs) || (mif6table[mifi].m6_ifp != ifp)) { 1389 /* came in the wrong interface */ 1390#ifdef MRT6DEBUG 1391 if (mrt6debug & DEBUG_FORWARD) 1392 log(LOG_DEBUG, 1393 "wrong if: ifid %d mifi %d mififid %x\n", 1394 ifp->if_index, mifi, 1395 mif6table[mifi].m6_ifp->if_index); 1396#endif 1397 mrt6stat.mrt6s_wrong_if++; 1398 rt->mf6c_wrong_if++; 1399 /* 1400 * If we are doing PIM processing, and we are forwarding 1401 * packets on this interface, send a message to the 1402 * routing daemon. 1403 */ 1404 /* have to make sure this is a valid mif */ 1405 if (mifi < nummifs && mif6table[mifi].m6_ifp) 1406 if (pim6 && (m->m_flags & M_LOOP) == 0) { 1407 /* 1408 * Check the M_LOOP flag to avoid an 1409 * unnecessary PIM assert. 1410 * XXX: M_LOOP is an ad-hoc hack... 1411 */ 1412 static struct sockaddr_in6 sin6 = 1413 { sizeof(sin6), AF_INET6 }; 1414 1415 struct mbuf *mm; 1416 struct mrt6msg *im; 1417#ifdef MRT6_OINIT 1418 struct omrt6msg *oim; 1419#endif 1420 1421 mm = m_copy(m, 0, sizeof(struct ip6_hdr)); 1422 if (mm && 1423 (M_HASCL(mm) || 1424 mm->m_len < sizeof(struct ip6_hdr))) 1425 mm = m_pullup(mm, sizeof(struct ip6_hdr)); 1426 if (mm == NULL) 1427 return (ENOBUFS); 1428 1429#ifdef MRT6_OINIT 1430 oim = NULL; 1431#endif 1432 im = NULL; 1433 switch (ip6_mrouter_ver) { 1434#ifdef MRT6_OINIT 1435 case MRT6_OINIT: 1436 oim = mtod(mm, struct omrt6msg *); 1437 oim->im6_msgtype = MRT6MSG_WRONGMIF; 1438 oim->im6_mbz = 0; 1439 break; 1440#endif 1441 case MRT6_INIT: 1442 im = mtod(mm, struct mrt6msg *); 1443 im->im6_msgtype = MRT6MSG_WRONGMIF; 1444 im->im6_mbz = 0; 1445 break; 1446 default: 1447 m_freem(mm); 1448 return (EINVAL); 1449 } 1450 1451 for (mifp = mif6table, iif = 0; 1452 iif < nummifs && mifp && 1453 mifp->m6_ifp != ifp; 1454 mifp++, iif++) 1455 ; 1456 1457 switch (ip6_mrouter_ver) { 1458#ifdef MRT6_OINIT 1459 case MRT6_OINIT: 1460 oim->im6_mif = iif; 1461 sin6.sin6_addr = oim->im6_src; 1462 break; 1463#endif 1464 case MRT6_INIT: 1465 im->im6_mif = iif; 1466 sin6.sin6_addr = im->im6_src; 1467 break; 1468 } 1469 1470 mrt6stat.mrt6s_upcalls++; 1471 1472 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1473#ifdef MRT6DEBUG 1474 if (mrt6debug) 1475 log(LOG_WARNING, "mdq, ip6_mrouter socket queue full\n"); 1476#endif 1477 ++mrt6stat.mrt6s_upq_sockfull; 1478 return (ENOBUFS); 1479 } /* if socket Q full */ 1480 } /* if PIM */ 1481 return (0); 1482 } /* if wrong iif */ 1483 1484 /* If I sourced this packet, it counts as output, else it was input. */ 1485 if (m->m_pkthdr.rcvif == NULL) { 1486 /* XXX: is rcvif really NULL when output?? */ 1487 mif6table[mifi].m6_pkt_out++; 1488 mif6table[mifi].m6_bytes_out += plen; 1489 } else { 1490 mif6table[mifi].m6_pkt_in++; 1491 mif6table[mifi].m6_bytes_in += plen; 1492 } 1493 rt->mf6c_pkt_cnt++; 1494 rt->mf6c_byte_cnt += plen; 1495 1496 /* 1497 * For each mif, forward a copy of the packet if there are group 1498 * members downstream on the interface. 1499 */ 1500 src0 = ip6->ip6_src; 1501 dst0 = ip6->ip6_dst; 1502 if ((error = in6_setscope(&src0, ifp, &iszone)) != 0 || 1503 (error = in6_setscope(&dst0, ifp, &idzone)) != 0) { 1504 ip6stat.ip6s_badscope++; 1505 return (error); 1506 } 1507 for (mifp = mif6table, mifi = 0; mifi < nummifs; mifp++, mifi++) { 1508 if (IF_ISSET(mifi, &rt->mf6c_ifset)) { 1509 /* 1510 * check if the outgoing packet is going to break 1511 * a scope boundary. 1512 * XXX For packets through PIM register tunnel 1513 * interface, we believe a routing daemon. 1514 */ 1515 if (!(mif6table[rt->mf6c_parent].m6_flags & 1516 MIFF_REGISTER) && 1517 !(mif6table[mifi].m6_flags & MIFF_REGISTER)) { 1518 if (in6_setscope(&src0, mif6table[mifi].m6_ifp, 1519 &oszone) || 1520 in6_setscope(&dst0, mif6table[mifi].m6_ifp, 1521 &odzone) || 1522 iszone != oszone || 1523 idzone != odzone) { 1524 ip6stat.ip6s_badscope++; 1525 continue; 1526 } 1527 } 1528 1529 mifp->m6_pkt_out++; 1530 mifp->m6_bytes_out += plen; 1531 MC6_SEND(ip6, mifp, m); 1532 } 1533 } 1534 return (0); 1535} 1536 1537static void 1538phyint_send(ip6, mifp, m) 1539 struct ip6_hdr *ip6; 1540 struct mif6 *mifp; 1541 struct mbuf *m; 1542{ 1543 struct mbuf *mb_copy; 1544 struct ifnet *ifp = mifp->m6_ifp; 1545 int error = 0; 1546 int s = splnet(); /* needs to protect static "ro" below. */ 1547 static struct route_in6 ro; 1548 struct in6_multi *in6m; 1549 struct sockaddr_in6 *dst6; 1550 u_long linkmtu; 1551 1552 /* 1553 * Make a new reference to the packet; make sure that 1554 * the IPv6 header is actually copied, not just referenced, 1555 * so that ip6_output() only scribbles on the copy. 1556 */ 1557 mb_copy = m_copy(m, 0, M_COPYALL); 1558 if (mb_copy && 1559 (M_HASCL(mb_copy) || mb_copy->m_len < sizeof(struct ip6_hdr))) 1560 mb_copy = m_pullup(mb_copy, sizeof(struct ip6_hdr)); 1561 if (mb_copy == NULL) { 1562 splx(s); 1563 return; 1564 } 1565 /* set MCAST flag to the outgoing packet */ 1566 mb_copy->m_flags |= M_MCAST; 1567 1568 /* 1569 * If we sourced the packet, call ip6_output since we may devide 1570 * the packet into fragments when the packet is too big for the 1571 * outgoing interface. 1572 * Otherwise, we can simply send the packet to the interface 1573 * sending queue. 1574 */ 1575 if (m->m_pkthdr.rcvif == NULL) { 1576 struct ip6_moptions im6o; 1577 1578 im6o.im6o_multicast_ifp = ifp; 1579 /* XXX: ip6_output will override ip6->ip6_hlim */ 1580 im6o.im6o_multicast_hlim = ip6->ip6_hlim; 1581 im6o.im6o_multicast_loop = 1; 1582 error = ip6_output(mb_copy, NULL, &ro, 1583 IPV6_FORWARDING, &im6o, NULL, NULL); 1584 1585#ifdef MRT6DEBUG 1586 if (mrt6debug & DEBUG_XMIT) 1587 log(LOG_DEBUG, "phyint_send on mif %d err %d\n", 1588 mifp - mif6table, error); 1589#endif 1590 splx(s); 1591 return; 1592 } 1593 1594 /* 1595 * If we belong to the destination multicast group 1596 * on the outgoing interface, loop back a copy. 1597 */ 1598 dst6 = (struct sockaddr_in6 *)&ro.ro_dst; 1599 IN6_LOOKUP_MULTI(ip6->ip6_dst, ifp, in6m); 1600 if (in6m != NULL) { 1601 dst6->sin6_len = sizeof(struct sockaddr_in6); 1602 dst6->sin6_family = AF_INET6; 1603 dst6->sin6_addr = ip6->ip6_dst; 1604 ip6_mloopback(ifp, m, (struct sockaddr_in6 *)&ro.ro_dst); 1605 } 1606 /* 1607 * Put the packet into the sending queue of the outgoing interface 1608 * if it would fit in the MTU of the interface. 1609 */ 1610 linkmtu = IN6_LINKMTU(ifp); 1611 if (mb_copy->m_pkthdr.len <= linkmtu || linkmtu < IPV6_MMTU) { 1612 dst6->sin6_len = sizeof(struct sockaddr_in6); 1613 dst6->sin6_family = AF_INET6; 1614 dst6->sin6_addr = ip6->ip6_dst; 1615 /* 1616 * We just call if_output instead of nd6_output here, since 1617 * we need no ND for a multicast forwarded packet...right? 1618 */ 1619 error = (*ifp->if_output)(ifp, mb_copy, 1620 (struct sockaddr *)&ro.ro_dst, NULL); 1621#ifdef MRT6DEBUG 1622 if (mrt6debug & DEBUG_XMIT) 1623 log(LOG_DEBUG, "phyint_send on mif %d err %d\n", 1624 mifp - mif6table, error); 1625#endif 1626 } else { 1627 /* 1628 * pMTU discovery is intentionally disabled by default, since 1629 * various router may notify pMTU in multicast, which can be 1630 * a DDoS to a router 1631 */ 1632 if (ip6_mcast_pmtu) 1633 icmp6_error(mb_copy, ICMP6_PACKET_TOO_BIG, 0, linkmtu); 1634 else { 1635#ifdef MRT6DEBUG 1636 if (mrt6debug & DEBUG_XMIT) { 1637 char ip6bufs[INET6_ADDRSTRLEN]; 1638 char ip6bufd[INET6_ADDRSTRLEN]; 1639 log(LOG_DEBUG, 1640 "phyint_send: packet too big on %s o %s " 1641 "g %s size %d(discarded)\n", 1642 if_name(ifp), 1643 ip6_sprintf(ip6bufs, &ip6->ip6_src), 1644 ip6_sprintf(ip6bufd, &ip6->ip6_dst), 1645 mb_copy->m_pkthdr.len); 1646 } 1647#endif /* MRT6DEBUG */ 1648 m_freem(mb_copy); /* simply discard the packet */ 1649 } 1650 } 1651 1652 splx(s); 1653} 1654 1655static int 1656register_send(ip6, mif, m) 1657 struct ip6_hdr *ip6; 1658 struct mif6 *mif; 1659 struct mbuf *m; 1660{ 1661 struct mbuf *mm; 1662 int i, len = m->m_pkthdr.len; 1663 static struct sockaddr_in6 sin6 = { sizeof(sin6), AF_INET6 }; 1664 struct mrt6msg *im6; 1665 1666#ifdef MRT6DEBUG 1667 if (mrt6debug) { 1668 char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN]; 1669 log(LOG_DEBUG, "** IPv6 register_send **\n src %s dst %s\n", 1670 ip6_sprintf(ip6bufs, &ip6->ip6_src), 1671 ip6_sprintf(ip6bufd, &ip6->ip6_dst)); 1672 } 1673#endif 1674 ++pim6stat.pim6s_snd_registers; 1675 1676 /* Make a copy of the packet to send to the user level process */ 1677 MGETHDR(mm, M_DONTWAIT, MT_HEADER); 1678 if (mm == NULL) 1679 return (ENOBUFS); 1680 mm->m_pkthdr.rcvif = NULL; 1681 mm->m_data += max_linkhdr; 1682 mm->m_len = sizeof(struct ip6_hdr); 1683 1684 if ((mm->m_next = m_copy(m, 0, M_COPYALL)) == NULL) { 1685 m_freem(mm); 1686 return (ENOBUFS); 1687 } 1688 i = MHLEN - M_LEADINGSPACE(mm); 1689 if (i > len) 1690 i = len; 1691 mm = m_pullup(mm, i); 1692 if (mm == NULL) 1693 return (ENOBUFS); 1694/* TODO: check it! */ 1695 mm->m_pkthdr.len = len + sizeof(struct ip6_hdr); 1696 1697 /* 1698 * Send message to routing daemon 1699 */ 1700 sin6.sin6_addr = ip6->ip6_src; 1701 1702 im6 = mtod(mm, struct mrt6msg *); 1703 im6->im6_msgtype = MRT6MSG_WHOLEPKT; 1704 im6->im6_mbz = 0; 1705 1706 im6->im6_mif = mif - mif6table; 1707 1708 /* iif info is not given for reg. encap.n */ 1709 mrt6stat.mrt6s_upcalls++; 1710 1711 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1712#ifdef MRT6DEBUG 1713 if (mrt6debug) 1714 log(LOG_WARNING, 1715 "register_send: ip6_mrouter socket queue full\n"); 1716#endif 1717 ++mrt6stat.mrt6s_upq_sockfull; 1718 return (ENOBUFS); 1719 } 1720 return (0); 1721} 1722 1723/* 1724 * PIM sparse mode hook 1725 * Receives the pim control messages, and passes them up to the listening 1726 * socket, using rip6_input. 1727 * The only message processed is the REGISTER pim message; the pim header 1728 * is stripped off, and the inner packet is passed to register_mforward. 1729 */ 1730int 1731pim6_input(mp, offp, proto) 1732 struct mbuf **mp; 1733 int *offp, proto; 1734{ 1735 struct pim *pim; /* pointer to a pim struct */ 1736 struct ip6_hdr *ip6; 1737 int pimlen; 1738 struct mbuf *m = *mp; 1739 int minlen; 1740 int off = *offp; 1741 1742 ++pim6stat.pim6s_rcv_total; 1743 1744 ip6 = mtod(m, struct ip6_hdr *); 1745 pimlen = m->m_pkthdr.len - *offp; 1746 1747 /* 1748 * Validate lengths 1749 */ 1750 if (pimlen < PIM_MINLEN) { 1751 ++pim6stat.pim6s_rcv_tooshort; 1752#ifdef MRT6DEBUG 1753 if (mrt6debug & DEBUG_PIM) 1754 log(LOG_DEBUG,"pim6_input: PIM packet too short\n"); 1755#endif 1756 m_freem(m); 1757 return (IPPROTO_DONE); 1758 } 1759 1760 /* 1761 * if the packet is at least as big as a REGISTER, go ahead 1762 * and grab the PIM REGISTER header size, to avoid another 1763 * possible m_pullup() later. 1764 * 1765 * PIM_MINLEN == pimhdr + u_int32 == 8 1766 * PIM6_REG_MINLEN == pimhdr + reghdr + eip6hdr == 4 + 4 + 40 1767 */ 1768 minlen = (pimlen >= PIM6_REG_MINLEN) ? PIM6_REG_MINLEN : PIM_MINLEN; 1769 1770 /* 1771 * Make sure that the IP6 and PIM headers in contiguous memory, and 1772 * possibly the PIM REGISTER header 1773 */ 1774#ifndef PULLDOWN_TEST 1775 IP6_EXTHDR_CHECK(m, off, minlen, IPPROTO_DONE); 1776 /* adjust pointer */ 1777 ip6 = mtod(m, struct ip6_hdr *); 1778 1779 /* adjust mbuf to point to the PIM header */ 1780 pim = (struct pim *)((caddr_t)ip6 + off); 1781#else 1782 IP6_EXTHDR_GET(pim, struct pim *, m, off, minlen); 1783 if (pim == NULL) { 1784 pim6stat.pim6s_rcv_tooshort++; 1785 return (IPPROTO_DONE); 1786 } 1787#endif 1788 1789#define PIM6_CHECKSUM 1790#ifdef PIM6_CHECKSUM 1791 { 1792 int cksumlen; 1793 1794 /* 1795 * Validate checksum. 1796 * If PIM REGISTER, exclude the data packet 1797 */ 1798 if (pim->pim_type == PIM_REGISTER) 1799 cksumlen = PIM_MINLEN; 1800 else 1801 cksumlen = pimlen; 1802 1803 if (in6_cksum(m, IPPROTO_PIM, off, cksumlen)) { 1804 ++pim6stat.pim6s_rcv_badsum; 1805#ifdef MRT6DEBUG 1806 if (mrt6debug & DEBUG_PIM) 1807 log(LOG_DEBUG, 1808 "pim6_input: invalid checksum\n"); 1809#endif 1810 m_freem(m); 1811 return (IPPROTO_DONE); 1812 } 1813 } 1814#endif /* PIM_CHECKSUM */ 1815 1816 /* PIM version check */ 1817 if (pim->pim_ver != PIM_VERSION) { 1818 ++pim6stat.pim6s_rcv_badversion; 1819#ifdef MRT6DEBUG 1820 log(LOG_ERR, 1821 "pim6_input: incorrect version %d, expecting %d\n", 1822 pim->pim_ver, PIM_VERSION); 1823#endif 1824 m_freem(m); 1825 return (IPPROTO_DONE); 1826 } 1827 1828 if (pim->pim_type == PIM_REGISTER) { 1829 /* 1830 * since this is a REGISTER, we'll make a copy of the register 1831 * headers ip6+pim+u_int32_t+encap_ip6, to be passed up to the 1832 * routing daemon. 1833 */ 1834 static struct sockaddr_in6 dst = { sizeof(dst), AF_INET6 }; 1835 1836 struct mbuf *mcp; 1837 struct ip6_hdr *eip6; 1838 u_int32_t *reghdr; 1839 int rc; 1840#ifdef MRT6DEBUG 1841 char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN]; 1842#endif 1843 1844 ++pim6stat.pim6s_rcv_registers; 1845 1846 if ((reg_mif_num >= nummifs) || (reg_mif_num == (mifi_t) -1)) { 1847#ifdef MRT6DEBUG 1848 if (mrt6debug & DEBUG_PIM) 1849 log(LOG_DEBUG, 1850 "pim6_input: register mif not set: %d\n", 1851 reg_mif_num); 1852#endif 1853 m_freem(m); 1854 return (IPPROTO_DONE); 1855 } 1856 1857 reghdr = (u_int32_t *)(pim + 1); 1858 1859 if ((ntohl(*reghdr) & PIM_NULL_REGISTER)) 1860 goto pim6_input_to_daemon; 1861 1862 /* 1863 * Validate length 1864 */ 1865 if (pimlen < PIM6_REG_MINLEN) { 1866 ++pim6stat.pim6s_rcv_tooshort; 1867 ++pim6stat.pim6s_rcv_badregisters; 1868#ifdef MRT6DEBUG 1869 log(LOG_ERR, 1870 "pim6_input: register packet size too " 1871 "small %d from %s\n", 1872 pimlen, ip6_sprintf(ip6bufs, &ip6->ip6_src)); 1873#endif 1874 m_freem(m); 1875 return (IPPROTO_DONE); 1876 } 1877 1878 eip6 = (struct ip6_hdr *) (reghdr + 1); 1879#ifdef MRT6DEBUG 1880 if (mrt6debug & DEBUG_PIM) 1881 log(LOG_DEBUG, 1882 "pim6_input[register], eip6: %s -> %s, " 1883 "eip6 plen %d\n", 1884 ip6_sprintf(ip6bufs, &eip6->ip6_src), 1885 ip6_sprintf(ip6bufd, &eip6->ip6_dst), 1886 ntohs(eip6->ip6_plen)); 1887#endif 1888 1889 /* verify the version number of the inner packet */ 1890 if ((eip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) { 1891 ++pim6stat.pim6s_rcv_badregisters; 1892#ifdef MRT6DEBUG 1893 log(LOG_DEBUG, "pim6_input: invalid IP version (%d) " 1894 "of the inner packet\n", 1895 (eip6->ip6_vfc & IPV6_VERSION)); 1896#endif 1897 m_freem(m); 1898 return (IPPROTO_NONE); 1899 } 1900 1901 /* verify the inner packet is destined to a mcast group */ 1902 if (!IN6_IS_ADDR_MULTICAST(&eip6->ip6_dst)) { 1903 ++pim6stat.pim6s_rcv_badregisters; 1904#ifdef MRT6DEBUG 1905 if (mrt6debug & DEBUG_PIM) 1906 log(LOG_DEBUG, 1907 "pim6_input: inner packet of register " 1908 "is not multicast %s\n", 1909 ip6_sprintf(ip6bufd, &eip6->ip6_dst)); 1910#endif 1911 m_freem(m); 1912 return (IPPROTO_DONE); 1913 } 1914 1915 /* 1916 * make a copy of the whole header to pass to the daemon later. 1917 */ 1918 mcp = m_copy(m, 0, off + PIM6_REG_MINLEN); 1919 if (mcp == NULL) { 1920#ifdef MRT6DEBUG 1921 log(LOG_ERR, 1922 "pim6_input: pim register: " 1923 "could not copy register head\n"); 1924#endif 1925 m_freem(m); 1926 return (IPPROTO_DONE); 1927 } 1928 1929 /* 1930 * forward the inner ip6 packet; point m_data at the inner ip6. 1931 */ 1932 m_adj(m, off + PIM_MINLEN); 1933#ifdef MRT6DEBUG 1934 if (mrt6debug & DEBUG_PIM) { 1935 log(LOG_DEBUG, 1936 "pim6_input: forwarding decapsulated register: " 1937 "src %s, dst %s, mif %d\n", 1938 ip6_sprintf(ip6bufs, &eip6->ip6_src), 1939 ip6_sprintf(ip6bufd, &eip6->ip6_dst), 1940 reg_mif_num); 1941 } 1942#endif 1943 1944 rc = if_simloop(mif6table[reg_mif_num].m6_ifp, m, 1945 dst.sin6_family, 0); 1946 1947 /* prepare the register head to send to the mrouting daemon */ 1948 m = mcp; 1949 } 1950 1951 /* 1952 * Pass the PIM message up to the daemon; if it is a register message 1953 * pass the 'head' only up to the daemon. This includes the 1954 * encapsulator ip6 header, pim header, register header and the 1955 * encapsulated ip6 header. 1956 */ 1957 pim6_input_to_daemon: 1958 rip6_input(&m, offp, proto); 1959 return (IPPROTO_DONE); 1960} 1961