1 /*- 2 * Copyright (C) 1998 WIDE Project. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 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. 16 * 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 27 * SUCH DAMAGE. 28 * 29 * $KAME: ip6_mroute.c,v 1.58 2001/12/18 02:36:31 itojun Exp $ 30 */ 31 32 /*- 33 * Copyright (c) 1989 Stephen Deering 34 * Copyright (c) 1992, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * This code is derived from software contributed to Berkeley by 38 * Stephen Deering of Stanford University. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 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. 51 * 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 62 * SUCH DAMAGE. 63 * 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 66 */ 67 68 /* 69 * IP multicast forwarding procedures 70 * 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 77 * 78 * MROUTING Revision: 3.5.1.2 + PIM-SMv2 (pimd) Support 79 */ 80 81 #include <sys/cdefs.h> 82 __FBSDID("$FreeBSD$"); 83 84 #include "opt_inet.h" 85 #include "opt_inet6.h" 86 87 #include <sys/param.h> 88 #include <sys/callout.h> 89 #include <sys/errno.h> 90 #include <sys/kernel.h> 91 #include <sys/lock.h> 92 #include <sys/malloc.h> 93 #include <sys/mbuf.h> 94 #include <sys/protosw.h> 95 #include <sys/signalvar.h> 96 #include <sys/socket.h> 97 #include <sys/socketvar.h> 98 #include <sys/sockio.h> 99 #include <sys/sx.h> 100 #include <sys/sysctl.h> 101 #include <sys/syslog.h> 102 #include <sys/systm.h> 103 #include <sys/time.h> 104 #include <sys/vimage.h> 105 106 #include <net/if.h> 107 #include <net/if_types.h> 108 #include <net/raw_cb.h> 109 #include <net/route.h> 110 111 #include <netinet/in.h> 112 #include <netinet/in_var.h> 113 #include <netinet/icmp6.h> 114 115 #include <netinet/ip6.h> 116 #include <netinet6/ip6_var.h> 117 #include <netinet6/scope6_var.h> 118 #include <netinet6/nd6.h> 119 #include <netinet6/ip6_mroute.h> 120 #include <netinet6/ip6protosw.h> 121 #include <netinet6/pim6.h> 122 #include <netinet6/pim6_var.h> 123 124 static MALLOC_DEFINE(M_MRTABLE6, "mf6c", "multicast forwarding cache entry"); 125 126 /* XXX: this is a very common idiom; move to <sys/mbuf.h> ? */ 127 #define M_HASCL(m) ((m)->m_flags & M_EXT) 128 129 static int ip6_mdq(struct mbuf *, struct ifnet *, struct mf6c *); 130 static void phyint_send(struct ip6_hdr *, struct mif6 *, struct mbuf *); 131 132 static int set_pim6(int *); 133 static int socket_send __P((struct socket *, struct mbuf *, 134 struct sockaddr_in6 *)); 135 static int register_send __P((struct ip6_hdr *, struct mif6 *, 136 struct mbuf *)); 137 138 extern struct domain inet6domain; 139 140 /* XXX: referenced from ip_mroute.c for dynamically loading this code. */ 141 struct ip6protosw in6_pim_protosw = { 142 .pr_type = SOCK_RAW, 143 .pr_domain = &inet6domain, 144 .pr_protocol = IPPROTO_PIM, 145 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 146 .pr_input = pim6_input, 147 .pr_output = rip6_output, 148 .pr_ctloutput = rip6_ctloutput, 149 .pr_usrreqs = &rip6_usrreqs 150 }; 151 152 static int ip6_mrouter_ver = 0; 153 154 SYSCTL_DECL(_net_inet6); 155 SYSCTL_DECL(_net_inet6_ip6); 156 SYSCTL_NODE(_net_inet6, IPPROTO_PIM, pim, CTLFLAG_RW, 0, "PIM"); 157 158 static struct mrt6stat mrt6stat; 159 SYSCTL_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 165 166 static struct mf6c *mf6ctable[MF6CTBLSIZ]; 167 SYSCTL_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)"); 171 172 static u_char n6expire[MF6CTBLSIZ]; 173 174 static struct mif6 mif6table[MAXMIFS]; 175 SYSCTL_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 180 static u_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 188 189 static void expire_upcalls(void *); 190 #define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */ 191 #define UPCALL_EXPIRE 6 /* number of timeouts */ 192 193 #ifdef INET 194 #ifdef MROUTING 195 extern 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 */ 210 static struct ifnet *multicast_register_if6; 211 212 #define ENCAP_HOPS 64 213 214 /* 215 * Private variables. 216 */ 217 static mifi_t nummifs = 0; 218 static mifi_t reg_mif_num = (mifi_t)-1; 219 220 static struct pim6stat pim6stat; 221 SYSCTL_STRUCT(_net_inet6_pim, PIM6CTL_STATS, stats, CTLFLAG_RD, 222 &pim6stat, pim6stat, 223 "PIM Statistics (struct pim6stat, netinet6/pim_var.h)"); 224 225 static 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 */ 238 #define MF6CFIND(o, g, rt) do { \ 239 struct mf6c *_rt = mf6ctable[MF6CHASH(o,g)]; \ 240 rt = NULL; \ 241 mrt6stat.mrt6s_mfc_lookups++; \ 242 while (_rt) { \ 243 if (IN6_ARE_ADDR_EQUAL(&_rt->mf6c_origin.sin6_addr, &(o)) && \ 244 IN6_ARE_ADDR_EQUAL(&_rt->mf6c_mcastgrp.sin6_addr, &(g)) && \ 245 (_rt->mf6c_stall == NULL)) { \ 246 rt = _rt; \ 247 break; \ 248 } \ 249 _rt = _rt->mf6c_next; \ 250 } \ 251 if (rt == NULL) { \ 252 mrt6stat.mrt6s_mfc_misses++; \ 253 } \ 254 } while (/*CONSTCOND*/ 0) 255 256 /* 257 * Macros to compute elapsed time efficiently 258 * Borrowed from Van Jacobson's scheduling code 259 * XXX: replace with timersub() ? 260 */ 261 #define TV_DELTA(a, b, delta) do { \ 262 int xxs; \ 263 \ 264 delta = (a).tv_usec - (b).tv_usec; \ 265 if ((xxs = (a).tv_sec - (b).tv_sec)) { \ 266 switch (xxs) { \ 267 case 2: \ 268 delta += 1000000; \ 269 /* FALLTHROUGH */ \ 270 case 1: \ 271 delta += 1000000; \ 272 break; \ 273 default: \ 274 delta += (1000000 * xxs); \ 275 } \ 276 } \ 277 } while (/*CONSTCOND*/ 0) 278 279 /* XXX: replace with timercmp(a, b, <) ? */ 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 50 285 static u_long upcall_data[UPCALL_MAX + 1]; 286 static void collate(); 287 #endif /* UPCALL_TIMING */ 288 289 static int get_sg_cnt(struct sioc_sg_req6 *); 290 static int get_mif6_cnt(struct sioc_mif_req6 *); 291 static int ip6_mrouter_init(struct socket *, int, int); 292 static int add_m6if(struct mif6ctl *); 293 static int del_m6if(mifi_t *); 294 static int add_m6fc(struct mf6cctl *); 295 static int del_m6fc(struct mf6cctl *); 296 297 static struct callout expire_upcalls_ch; 298 299 int X_ip6_mforward(struct ip6_hdr *ip6, struct ifnet *ifp, struct mbuf *m); 300 int X_ip6_mrouter_done(void); 301 int X_ip6_mrouter_set(struct socket *so, struct sockopt *sopt); 302 int X_ip6_mrouter_get(struct socket *so, struct sockopt *sopt); 303 int X_mrt6_ioctl(int cmd, caddr_t data); 304 305 /* 306 * Handle MRT setsockopt commands to modify the multicast routing tables. 307 */ 308 int 309 X_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 */ 376 int 377 X_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, &V_pim6, sizeof(V_pim6)); 387 break; 388 } 389 return (error); 390 } 391 392 /* 393 * Handle ioctl commands to obtain information from the cache 394 */ 395 int 396 X_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 */ 411 static int 412 get_sg_cnt(struct sioc_sg_req6 *req) 413 { 414 struct mf6c *rt; 415 int s; 416 417 s = splnet(); 418 MF6CFIND(req->src.sin6_addr, req->grp.sin6_addr, rt); 419 splx(s); 420 if (rt != NULL) { 421 req->pktcnt = rt->mf6c_pkt_cnt; 422 req->bytecnt = rt->mf6c_byte_cnt; 423 req->wrong_if = rt->mf6c_wrong_if; 424 } else 425 return (ESRCH); 426 #if 0 427 req->pktcnt = req->bytecnt = req->wrong_if = 0xffffffff; 428 #endif 429 430 return (0); 431 } 432 433 /* 434 * returns the input and output packet and byte counts on the mif provided 435 */ 436 static int 437 get_mif6_cnt(struct sioc_mif_req6 *req) 438 { 439 mifi_t mifi = req->mifi; 440 441 if (mifi >= nummifs) 442 return (EINVAL); 443 444 req->icount = mif6table[mifi].m6_pkt_in; 445 req->ocount = mif6table[mifi].m6_pkt_out; 446 req->ibytes = mif6table[mifi].m6_bytes_in; 447 req->obytes = mif6table[mifi].m6_bytes_out; 448 449 return (0); 450 } 451 452 static int 453 set_pim6(int *i) 454 { 455 if ((*i != 1) && (*i != 0)) 456 return (EINVAL); 457 458 V_pim6 = *i; 459 460 return (0); 461 } 462 463 /* 464 * Enable multicast routing 465 */ 466 static int 467 ip6_mrouter_init(struct socket *so, int v, int cmd) 468 { 469 #ifdef MRT6DEBUG 470 if (V_mrt6debug) 471 log(LOG_DEBUG, 472 "ip6_mrouter_init: so_type = %d, pr_protocol = %d\n", 473 so->so_type, so->so_proto->pr_protocol); 474 #endif 475 476 if (so->so_type != SOCK_RAW || 477 so->so_proto->pr_protocol != IPPROTO_ICMPV6) 478 return (EOPNOTSUPP); 479 480 if (v != 1) 481 return (ENOPROTOOPT); 482 483 if (ip6_mrouter != NULL) 484 return (EADDRINUSE); 485 486 ip6_mrouter = so; 487 V_ip6_mrouter_ver = cmd; 488 489 bzero((caddr_t)mf6ctable, sizeof(mf6ctable)); 490 bzero((caddr_t)n6expire, sizeof(n6expire)); 491 492 V_pim6 = 0;/* used for stubbing out/in pim stuff */ 493 494 callout_init(&expire_upcalls_ch, 0); 495 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 496 expire_upcalls, NULL); 497 498 #ifdef MRT6DEBUG 499 if (V_mrt6debug) 500 log(LOG_DEBUG, "ip6_mrouter_init\n"); 501 #endif 502 503 return (0); 504 } 505 506 /* 507 * Disable multicast routing 508 */ 509 int 510 X_ip6_mrouter_done(void) 511 { 512 mifi_t mifi; 513 int i; 514 struct mf6c *rt; 515 struct rtdetq *rte; 516 int s; 517 518 s = splnet(); 519 520 /* 521 * For each phyint in use, disable promiscuous reception of all IPv6 522 * multicasts. 523 */ 524 #ifdef INET 525 #ifdef MROUTING 526 /* 527 * If there is still IPv4 multicast routing daemon, 528 * we remain interfaces to receive all muliticasted packets. 529 * XXX: there may be an interface in which the IPv4 multicast 530 * daemon is not interested... 531 */ 532 if (!V_ip_mrouter) 533 #endif 534 #endif 535 { 536 for (mifi = 0; mifi < nummifs; mifi++) { 537 if (mif6table[mifi].m6_ifp && 538 !(mif6table[mifi].m6_flags & MIFF_REGISTER)) { 539 if_allmulti(mif6table[mifi].m6_ifp, 0); 540 } 541 } 542 } 543 bzero((caddr_t)mif6table, sizeof(mif6table)); 544 nummifs = 0; 545 546 V_pim6 = 0; /* used to stub out/in pim specific code */ 547 548 callout_stop(&expire_upcalls_ch); 549 550 /* 551 * Free all multicast forwarding cache entries. 552 */ 553 for (i = 0; i < MF6CTBLSIZ; i++) { 554 rt = mf6ctable[i]; 555 while (rt) { 556 struct mf6c *frt; 557 558 for (rte = rt->mf6c_stall; rte != NULL; ) { 559 struct rtdetq *n = rte->next; 560 561 m_free(rte->m); 562 free(rte, M_MRTABLE6); 563 rte = n; 564 } 565 frt = rt; 566 rt = rt->mf6c_next; 567 free(frt, M_MRTABLE6); 568 } 569 } 570 571 bzero((caddr_t)mf6ctable, sizeof(mf6ctable)); 572 573 /* 574 * Reset register interface 575 */ 576 if (reg_mif_num != (mifi_t)-1 && multicast_register_if6 != NULL) { 577 if_detach(multicast_register_if6); 578 if_free(multicast_register_if6); 579 reg_mif_num = (mifi_t)-1; 580 multicast_register_if6 = NULL; 581 } 582 583 ip6_mrouter = NULL; 584 V_ip6_mrouter_ver = 0; 585 586 splx(s); 587 588 #ifdef MRT6DEBUG 589 if (V_mrt6debug) 590 log(LOG_DEBUG, "ip6_mrouter_done\n"); 591 #endif 592 593 return (0); 594 } 595 596 static struct sockaddr_in6 sin6 = { sizeof(sin6), AF_INET6 }; 597 598 /* 599 * Add a mif to the mif table 600 */ 601 static int 602 add_m6if(struct mif6ctl *mifcp) 603 { 604 struct mif6 *mifp; 605 struct ifnet *ifp; 606 int error, s; 607 608 if (mifcp->mif6c_mifi >= MAXMIFS) 609 return (EINVAL); 610 mifp = mif6table + mifcp->mif6c_mifi; 611 if (mifp->m6_ifp) 612 return (EADDRINUSE); /* XXX: is it appropriate? */ 613 if (mifcp->mif6c_pifi == 0 || mifcp->mif6c_pifi > V_if_index) 614 return (ENXIO); 615 ifp = ifnet_byindex(mifcp->mif6c_pifi); 616 617 if (mifcp->mif6c_flags & MIFF_REGISTER) { 618 if (reg_mif_num == (mifi_t)-1) { 619 ifp = if_alloc(IFT_OTHER); 620 621 if_initname(ifp, "register_mif", 0); 622 ifp->if_flags |= IFF_LOOPBACK; 623 if_attach(ifp); 624 multicast_register_if6 = ifp; 625 reg_mif_num = mifcp->mif6c_mifi; 626 /* 627 * it is impossible to guess the ifindex of the 628 * register interface. So mif6c_pifi is automatically 629 * calculated. 630 */ 631 mifcp->mif6c_pifi = ifp->if_index; 632 } else { 633 ifp = multicast_register_if6; 634 } 635 636 } /* if REGISTER */ 637 else { 638 /* Make sure the interface supports multicast */ 639 if ((ifp->if_flags & IFF_MULTICAST) == 0) 640 return (EOPNOTSUPP); 641 642 s = splnet(); 643 error = if_allmulti(ifp, 1); 644 splx(s); 645 if (error) 646 return (error); 647 } 648 649 s = splnet(); 650 mifp->m6_flags = mifcp->mif6c_flags; 651 mifp->m6_ifp = ifp; 652 653 /* initialize per mif pkt counters */ 654 mifp->m6_pkt_in = 0; 655 mifp->m6_pkt_out = 0; 656 mifp->m6_bytes_in = 0; 657 mifp->m6_bytes_out = 0; 658 splx(s); 659 660 /* Adjust nummifs up if the mifi is higher than nummifs */ 661 if (nummifs <= mifcp->mif6c_mifi) 662 nummifs = mifcp->mif6c_mifi + 1; 663 664 #ifdef MRT6DEBUG 665 if (V_mrt6debug) 666 log(LOG_DEBUG, 667 "add_mif #%d, phyint %s\n", 668 mifcp->mif6c_mifi, 669 ifp->if_xname); 670 #endif 671 672 return (0); 673 } 674 675 /* 676 * Delete a mif from the mif table 677 */ 678 static int 679 del_m6if(mifi_t *mifip) 680 { 681 struct mif6 *mifp = mif6table + *mifip; 682 mifi_t mifi; 683 struct ifnet *ifp; 684 int s; 685 686 if (*mifip >= nummifs) 687 return (EINVAL); 688 if (mifp->m6_ifp == NULL) 689 return (EINVAL); 690 691 s = splnet(); 692 693 if (!(mifp->m6_flags & MIFF_REGISTER)) { 694 /* 695 * XXX: what if there is yet IPv4 multicast daemon 696 * using the interface? 697 */ 698 ifp = mifp->m6_ifp; 699 700 if_allmulti(ifp, 0); 701 } else { 702 if (reg_mif_num != (mifi_t)-1 && 703 multicast_register_if6 != NULL) { 704 if_detach(multicast_register_if6); 705 if_free(multicast_register_if6); 706 reg_mif_num = (mifi_t)-1; 707 multicast_register_if6 = NULL; 708 } 709 } 710 711 bzero((caddr_t)mifp, sizeof(*mifp)); 712 713 /* Adjust nummifs down */ 714 for (mifi = nummifs; mifi > 0; mifi--) 715 if (mif6table[mifi - 1].m6_ifp) 716 break; 717 nummifs = mifi; 718 719 splx(s); 720 721 #ifdef MRT6DEBUG 722 if (V_mrt6debug) 723 log(LOG_DEBUG, "del_m6if %d, nummifs %d\n", *mifip, nummifs); 724 #endif 725 726 return (0); 727 } 728 729 /* 730 * Add an mfc entry 731 */ 732 static int 733 add_m6fc(struct mf6cctl *mfccp) 734 { 735 struct mf6c *rt; 736 u_long hash; 737 struct rtdetq *rte; 738 u_short nstl; 739 int s; 740 char ip6bufo[INET6_ADDRSTRLEN], ip6bufg[INET6_ADDRSTRLEN]; 741 742 MF6CFIND(mfccp->mf6cc_origin.sin6_addr, 743 mfccp->mf6cc_mcastgrp.sin6_addr, rt); 744 745 /* If an entry already exists, just update the fields */ 746 if (rt) { 747 #ifdef MRT6DEBUG 748 if (V_mrt6debug & DEBUG_MFC) { 749 log(LOG_DEBUG, 750 "add_m6fc no upcall h %d o %s g %s p %x\n", 751 ip6_sprintf(ip6bufo, &mfccp->mf6cc_origin.sin6_addr), 752 ip6_sprintf(ip6bufg, &mfccp->mf6cc_mcastgrp.sin6_addr), 753 mfccp->mf6cc_parent); 754 } 755 #endif 756 757 s = splnet(); 758 rt->mf6c_parent = mfccp->mf6cc_parent; 759 rt->mf6c_ifset = mfccp->mf6cc_ifset; 760 splx(s); 761 return (0); 762 } 763 764 /* 765 * Find the entry for which the upcall was made and update 766 */ 767 s = splnet(); 768 hash = MF6CHASH(mfccp->mf6cc_origin.sin6_addr, 769 mfccp->mf6cc_mcastgrp.sin6_addr); 770 for (rt = mf6ctable[hash], nstl = 0; rt; rt = rt->mf6c_next) { 771 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 772 &mfccp->mf6cc_origin.sin6_addr) && 773 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 774 &mfccp->mf6cc_mcastgrp.sin6_addr) && 775 (rt->mf6c_stall != NULL)) { 776 777 if (nstl++) 778 log(LOG_ERR, 779 "add_m6fc: %s o %s g %s p %x dbx %p\n", 780 "multiple kernel entries", 781 ip6_sprintf(ip6bufo, 782 &mfccp->mf6cc_origin.sin6_addr), 783 ip6_sprintf(ip6bufg, 784 &mfccp->mf6cc_mcastgrp.sin6_addr), 785 mfccp->mf6cc_parent, rt->mf6c_stall); 786 787 #ifdef MRT6DEBUG 788 if (V_mrt6debug & DEBUG_MFC) 789 log(LOG_DEBUG, 790 "add_m6fc o %s g %s p %x dbg %x\n", 791 ip6_sprintf(ip6bufo, 792 &mfccp->mf6cc_origin.sin6_addr), 793 ip6_sprintf(ip6bufg, 794 &mfccp->mf6cc_mcastgrp.sin6_addr), 795 mfccp->mf6cc_parent, rt->mf6c_stall); 796 #endif 797 798 rt->mf6c_origin = mfccp->mf6cc_origin; 799 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 800 rt->mf6c_parent = mfccp->mf6cc_parent; 801 rt->mf6c_ifset = mfccp->mf6cc_ifset; 802 /* initialize pkt counters per src-grp */ 803 rt->mf6c_pkt_cnt = 0; 804 rt->mf6c_byte_cnt = 0; 805 rt->mf6c_wrong_if = 0; 806 807 rt->mf6c_expire = 0; /* Don't clean this guy up */ 808 n6expire[hash]--; 809 810 /* free packets Qed at the end of this entry */ 811 for (rte = rt->mf6c_stall; rte != NULL; ) { 812 struct rtdetq *n = rte->next; 813 ip6_mdq(rte->m, rte->ifp, rt); 814 m_freem(rte->m); 815 #ifdef UPCALL_TIMING 816 collate(&(rte->t)); 817 #endif /* UPCALL_TIMING */ 818 free(rte, M_MRTABLE6); 819 rte = n; 820 } 821 rt->mf6c_stall = NULL; 822 } 823 } 824 825 /* 826 * It is possible that an entry is being inserted without an upcall 827 */ 828 if (nstl == 0) { 829 #ifdef MRT6DEBUG 830 if (V_mrt6debug & DEBUG_MFC) 831 log(LOG_DEBUG, 832 "add_mfc no upcall h %d o %s g %s p %x\n", 833 hash, 834 ip6_sprintf(ip6bufo, &mfccp->mf6cc_origin.sin6_addr), 835 ip6_sprintf(ip6bufg, &mfccp->mf6cc_mcastgrp.sin6_addr), 836 mfccp->mf6cc_parent); 837 #endif 838 839 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 840 841 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 842 &mfccp->mf6cc_origin.sin6_addr)&& 843 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 844 &mfccp->mf6cc_mcastgrp.sin6_addr)) { 845 846 rt->mf6c_origin = mfccp->mf6cc_origin; 847 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 848 rt->mf6c_parent = mfccp->mf6cc_parent; 849 rt->mf6c_ifset = mfccp->mf6cc_ifset; 850 /* initialize pkt counters per src-grp */ 851 rt->mf6c_pkt_cnt = 0; 852 rt->mf6c_byte_cnt = 0; 853 rt->mf6c_wrong_if = 0; 854 855 if (rt->mf6c_expire) 856 n6expire[hash]--; 857 rt->mf6c_expire = 0; 858 } 859 } 860 if (rt == NULL) { 861 /* no upcall, so make a new entry */ 862 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE6, 863 M_NOWAIT); 864 if (rt == NULL) { 865 splx(s); 866 return (ENOBUFS); 867 } 868 869 /* insert new entry at head of hash chain */ 870 rt->mf6c_origin = mfccp->mf6cc_origin; 871 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 872 rt->mf6c_parent = mfccp->mf6cc_parent; 873 rt->mf6c_ifset = mfccp->mf6cc_ifset; 874 /* initialize pkt counters per src-grp */ 875 rt->mf6c_pkt_cnt = 0; 876 rt->mf6c_byte_cnt = 0; 877 rt->mf6c_wrong_if = 0; 878 rt->mf6c_expire = 0; 879 rt->mf6c_stall = NULL; 880 881 /* link into table */ 882 rt->mf6c_next = mf6ctable[hash]; 883 mf6ctable[hash] = rt; 884 } 885 } 886 splx(s); 887 return (0); 888 } 889 890 #ifdef UPCALL_TIMING 891 /* 892 * collect delay statistics on the upcalls 893 */ 894 static void 895 collate(struct timeval *t) 896 { 897 u_long d; 898 struct timeval tp; 899 u_long delta; 900 901 GET_TIME(tp); 902 903 if (TV_LT(*t, tp)) 904 { 905 TV_DELTA(tp, *t, delta); 906 907 d = delta >> 10; 908 if (d > UPCALL_MAX) 909 d = UPCALL_MAX; 910 911 ++upcall_data[d]; 912 } 913 } 914 #endif /* UPCALL_TIMING */ 915 916 /* 917 * Delete an mfc entry 918 */ 919 static int 920 del_m6fc(struct mf6cctl *mfccp) 921 { 922 struct sockaddr_in6 origin; 923 struct sockaddr_in6 mcastgrp; 924 struct mf6c *rt; 925 struct mf6c **nptr; 926 u_long hash; 927 int s; 928 929 origin = mfccp->mf6cc_origin; 930 mcastgrp = mfccp->mf6cc_mcastgrp; 931 hash = MF6CHASH(origin.sin6_addr, mcastgrp.sin6_addr); 932 933 #ifdef MRT6DEBUG 934 if (V_mrt6debug & DEBUG_MFC) { 935 char ip6bufo[INET6_ADDRSTRLEN], ip6bufg[INET6_ADDRSTRLEN]; 936 log(LOG_DEBUG,"del_m6fc orig %s mcastgrp %s\n", 937 ip6_sprintf(ip6bufo, &origin.sin6_addr), 938 ip6_sprintf(ip6bufg, &mcastgrp.sin6_addr)); 939 } 940 #endif 941 942 s = splnet(); 943 944 nptr = &mf6ctable[hash]; 945 while ((rt = *nptr) != NULL) { 946 if (IN6_ARE_ADDR_EQUAL(&origin.sin6_addr, 947 &rt->mf6c_origin.sin6_addr) && 948 IN6_ARE_ADDR_EQUAL(&mcastgrp.sin6_addr, 949 &rt->mf6c_mcastgrp.sin6_addr) && 950 rt->mf6c_stall == NULL) 951 break; 952 953 nptr = &rt->mf6c_next; 954 } 955 if (rt == NULL) { 956 splx(s); 957 return (EADDRNOTAVAIL); 958 } 959 960 *nptr = rt->mf6c_next; 961 free(rt, M_MRTABLE6); 962 963 splx(s); 964 965 return (0); 966 } 967 968 static int 969 socket_send(struct socket *s, struct mbuf *mm, struct sockaddr_in6 *src) 970 { 971 972 if (s) { 973 if (sbappendaddr(&s->so_rcv, 974 (struct sockaddr *)src, 975 mm, (struct mbuf *)0) != 0) { 976 sorwakeup(s); 977 return (0); 978 } 979 } 980 m_freem(mm); 981 return (-1); 982 } 983 984 /* 985 * IPv6 multicast forwarding function. This function assumes that the packet 986 * pointed to by "ip6" has arrived on (or is about to be sent to) the interface 987 * pointed to by "ifp", and the packet is to be relayed to other networks 988 * that have members of the packet's destination IPv6 multicast group. 989 * 990 * The packet is returned unscathed to the caller, unless it is 991 * erroneous, in which case a non-zero return value tells the caller to 992 * discard it. 993 * 994 * NOTE: this implementation assumes that m->m_pkthdr.rcvif is NULL iff 995 * this function is called in the originating context (i.e., not when 996 * forwarding a packet from other node). ip6_output(), which is currently the 997 * only function that calls this function is called in the originating context, 998 * explicitly ensures this condition. It is caller's responsibility to ensure 999 * that if this function is called from somewhere else in the originating 1000 * context in the future. 1001 */ 1002 int 1003 X_ip6_mforward(struct ip6_hdr *ip6, struct ifnet *ifp, struct mbuf *m) 1004 { 1005 struct mf6c *rt; 1006 struct mif6 *mifp; 1007 struct mbuf *mm; 1008 int s; 1009 mifi_t mifi; 1010 char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN]; 1011 1012 #ifdef MRT6DEBUG 1013 if (V_mrt6debug & DEBUG_FORWARD) 1014 log(LOG_DEBUG, "ip6_mforward: src %s, dst %s, ifindex %d\n", 1015 ip6_sprintf(ip6bufs, &ip6->ip6_src), 1016 ip6_sprintf(ip6bufd, &ip6->ip6_dst), 1017 ifp->if_index); 1018 #endif 1019 1020 /* 1021 * Don't forward a packet with Hop limit of zero or one, 1022 * or a packet destined to a local-only group. 1023 */ 1024 if (ip6->ip6_hlim <= 1 || IN6_IS_ADDR_MC_INTFACELOCAL(&ip6->ip6_dst) || 1025 IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst)) 1026 return (0); 1027 ip6->ip6_hlim--; 1028 1029 /* 1030 * Source address check: do not forward packets with unspecified 1031 * source. It was discussed in July 2000, on ipngwg mailing list. 1032 * This is rather more serious than unicast cases, because some 1033 * MLD packets can be sent with the unspecified source address 1034 * (although such packets must normally set 1 to the hop limit field). 1035 */ 1036 if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) { 1037 V_ip6stat.ip6s_cantforward++; 1038 if (V_ip6_log_time + V_ip6_log_interval < time_second) { 1039 V_ip6_log_time = time_second; 1040 log(LOG_DEBUG, 1041 "cannot forward " 1042 "from %s to %s nxt %d received on %s\n", 1043 ip6_sprintf(ip6bufs, &ip6->ip6_src), 1044 ip6_sprintf(ip6bufd, &ip6->ip6_dst), 1045 ip6->ip6_nxt, 1046 if_name(m->m_pkthdr.rcvif)); 1047 } 1048 return (0); 1049 } 1050 1051 /* 1052 * Determine forwarding mifs from the forwarding cache table 1053 */ 1054 s = splnet(); 1055 MF6CFIND(ip6->ip6_src, ip6->ip6_dst, rt); 1056 1057 /* Entry exists, so forward if necessary */ 1058 if (rt) { 1059 splx(s); 1060 return (ip6_mdq(m, ifp, rt)); 1061 } else { 1062 /* 1063 * If we don't have a route for packet's origin, 1064 * Make a copy of the packet & 1065 * send message to routing daemon 1066 */ 1067 1068 struct mbuf *mb0; 1069 struct rtdetq *rte; 1070 u_long hash; 1071 /* int i, npkts;*/ 1072 #ifdef UPCALL_TIMING 1073 struct timeval tp; 1074 1075 GET_TIME(tp); 1076 #endif /* UPCALL_TIMING */ 1077 1078 mrt6stat.mrt6s_no_route++; 1079 #ifdef MRT6DEBUG 1080 if (V_mrt6debug & (DEBUG_FORWARD | DEBUG_MFC)) 1081 log(LOG_DEBUG, "ip6_mforward: no rte s %s g %s\n", 1082 ip6_sprintf(ip6bufs, &ip6->ip6_src), 1083 ip6_sprintf(ip6bufd, &ip6->ip6_dst)); 1084 #endif 1085 1086 /* 1087 * Allocate mbufs early so that we don't do extra work if we 1088 * are just going to fail anyway. 1089 */ 1090 rte = (struct rtdetq *)malloc(sizeof(*rte), M_MRTABLE6, 1091 M_NOWAIT); 1092 if (rte == NULL) { 1093 splx(s); 1094 return (ENOBUFS); 1095 } 1096 mb0 = m_copy(m, 0, M_COPYALL); 1097 /* 1098 * Pullup packet header if needed before storing it, 1099 * as other references may modify it in the meantime. 1100 */ 1101 if (mb0 && 1102 (M_HASCL(mb0) || mb0->m_len < sizeof(struct ip6_hdr))) 1103 mb0 = m_pullup(mb0, sizeof(struct ip6_hdr)); 1104 if (mb0 == NULL) { 1105 free(rte, M_MRTABLE6); 1106 splx(s); 1107 return (ENOBUFS); 1108 } 1109 1110 /* is there an upcall waiting for this packet? */ 1111 hash = MF6CHASH(ip6->ip6_src, ip6->ip6_dst); 1112 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 1113 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, 1114 &rt->mf6c_origin.sin6_addr) && 1115 IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, 1116 &rt->mf6c_mcastgrp.sin6_addr) && 1117 (rt->mf6c_stall != NULL)) 1118 break; 1119 } 1120 1121 if (rt == NULL) { 1122 struct mrt6msg *im; 1123 #ifdef MRT6_OINIT 1124 struct omrt6msg *oim; 1125 #endif 1126 1127 /* no upcall, so make a new entry */ 1128 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE6, 1129 M_NOWAIT); 1130 if (rt == NULL) { 1131 free(rte, M_MRTABLE6); 1132 m_freem(mb0); 1133 splx(s); 1134 return (ENOBUFS); 1135 } 1136 /* 1137 * Make a copy of the header to send to the user 1138 * level process 1139 */ 1140 mm = m_copy(mb0, 0, sizeof(struct ip6_hdr)); 1141 1142 if (mm == NULL) { 1143 free(rte, M_MRTABLE6); 1144 m_freem(mb0); 1145 free(rt, M_MRTABLE6); 1146 splx(s); 1147 return (ENOBUFS); 1148 } 1149 1150 /* 1151 * Send message to routing daemon 1152 */ 1153 sin6.sin6_addr = ip6->ip6_src; 1154 1155 im = NULL; 1156 #ifdef MRT6_OINIT 1157 oim = NULL; 1158 #endif 1159 switch (V_ip6_mrouter_ver) { 1160 #ifdef MRT6_OINIT 1161 case MRT6_OINIT: 1162 oim = mtod(mm, struct omrt6msg *); 1163 oim->im6_msgtype = MRT6MSG_NOCACHE; 1164 oim->im6_mbz = 0; 1165 break; 1166 #endif 1167 case MRT6_INIT: 1168 im = mtod(mm, struct mrt6msg *); 1169 im->im6_msgtype = MRT6MSG_NOCACHE; 1170 im->im6_mbz = 0; 1171 break; 1172 default: 1173 free(rte, M_MRTABLE6); 1174 m_freem(mb0); 1175 free(rt, M_MRTABLE6); 1176 splx(s); 1177 return (EINVAL); 1178 } 1179 1180 #ifdef MRT6DEBUG 1181 if (V_mrt6debug & DEBUG_FORWARD) 1182 log(LOG_DEBUG, 1183 "getting the iif info in the kernel\n"); 1184 #endif 1185 1186 for (mifp = mif6table, mifi = 0; 1187 mifi < nummifs && mifp->m6_ifp != ifp; 1188 mifp++, mifi++) 1189 ; 1190 1191 switch (V_ip6_mrouter_ver) { 1192 #ifdef MRT6_OINIT 1193 case MRT6_OINIT: 1194 oim->im6_mif = mifi; 1195 break; 1196 #endif 1197 case MRT6_INIT: 1198 im->im6_mif = mifi; 1199 break; 1200 } 1201 1202 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1203 log(LOG_WARNING, "ip6_mforward: ip6_mrouter " 1204 "socket queue full\n"); 1205 mrt6stat.mrt6s_upq_sockfull++; 1206 free(rte, M_MRTABLE6); 1207 m_freem(mb0); 1208 free(rt, M_MRTABLE6); 1209 splx(s); 1210 return (ENOBUFS); 1211 } 1212 1213 mrt6stat.mrt6s_upcalls++; 1214 1215 /* insert new entry at head of hash chain */ 1216 bzero(rt, sizeof(*rt)); 1217 rt->mf6c_origin.sin6_family = AF_INET6; 1218 rt->mf6c_origin.sin6_len = sizeof(struct sockaddr_in6); 1219 rt->mf6c_origin.sin6_addr = ip6->ip6_src; 1220 rt->mf6c_mcastgrp.sin6_family = AF_INET6; 1221 rt->mf6c_mcastgrp.sin6_len = sizeof(struct sockaddr_in6); 1222 rt->mf6c_mcastgrp.sin6_addr = ip6->ip6_dst; 1223 rt->mf6c_expire = UPCALL_EXPIRE; 1224 n6expire[hash]++; 1225 rt->mf6c_parent = MF6C_INCOMPLETE_PARENT; 1226 1227 /* link into table */ 1228 rt->mf6c_next = mf6ctable[hash]; 1229 mf6ctable[hash] = rt; 1230 /* Add this entry to the end of the queue */ 1231 rt->mf6c_stall = rte; 1232 } else { 1233 /* determine if q has overflowed */ 1234 struct rtdetq **p; 1235 int npkts = 0; 1236 1237 for (p = &rt->mf6c_stall; *p != NULL; p = &(*p)->next) 1238 if (++npkts > MAX_UPQ6) { 1239 mrt6stat.mrt6s_upq_ovflw++; 1240 free(rte, M_MRTABLE6); 1241 m_freem(mb0); 1242 splx(s); 1243 return (0); 1244 } 1245 1246 /* Add this entry to the end of the queue */ 1247 *p = rte; 1248 } 1249 1250 rte->next = NULL; 1251 rte->m = mb0; 1252 rte->ifp = ifp; 1253 #ifdef UPCALL_TIMING 1254 rte->t = tp; 1255 #endif /* UPCALL_TIMING */ 1256 1257 splx(s); 1258 1259 return (0); 1260 } 1261 } 1262 1263 /* 1264 * Clean up cache entries if upcalls are not serviced 1265 * Call from the Slow Timeout mechanism, every half second. 1266 */ 1267 static void 1268 expire_upcalls(void *unused) 1269 { 1270 struct rtdetq *rte; 1271 struct mf6c *mfc, **nptr; 1272 int i; 1273 int s; 1274 1275 s = splnet(); 1276 for (i = 0; i < MF6CTBLSIZ; i++) { 1277 if (n6expire[i] == 0) 1278 continue; 1279 nptr = &mf6ctable[i]; 1280 while ((mfc = *nptr) != NULL) { 1281 rte = mfc->mf6c_stall; 1282 /* 1283 * Skip real cache entries 1284 * Make sure it wasn't marked to not expire (shouldn't happen) 1285 * If it expires now 1286 */ 1287 if (rte != NULL && 1288 mfc->mf6c_expire != 0 && 1289 --mfc->mf6c_expire == 0) { 1290 #ifdef MRT6DEBUG 1291 if (V_mrt6debug & DEBUG_EXPIRE) { 1292 char ip6bufo[INET6_ADDRSTRLEN]; 1293 char ip6bufg[INET6_ADDRSTRLEN]; 1294 log(LOG_DEBUG, "expire_upcalls: expiring (%s %s)\n", 1295 ip6_sprintf(ip6bufo, &mfc->mf6c_origin.sin6_addr), 1296 ip6_sprintf(ip6bufg, &mfc->mf6c_mcastgrp.sin6_addr)); 1297 } 1298 #endif 1299 /* 1300 * drop all the packets 1301 * free the mbuf with the pkt, if, timing info 1302 */ 1303 do { 1304 struct rtdetq *n = rte->next; 1305 m_freem(rte->m); 1306 free(rte, M_MRTABLE6); 1307 rte = n; 1308 } while (rte != NULL); 1309 mrt6stat.mrt6s_cache_cleanups++; 1310 n6expire[i]--; 1311 1312 *nptr = mfc->mf6c_next; 1313 free(mfc, M_MRTABLE6); 1314 } else { 1315 nptr = &mfc->mf6c_next; 1316 } 1317 } 1318 } 1319 splx(s); 1320 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 1321 expire_upcalls, NULL); 1322 } 1323 1324 /* 1325 * Packet forwarding routine once entry in the cache is made 1326 */ 1327 static int 1328 ip6_mdq(struct mbuf *m, struct ifnet *ifp, struct mf6c *rt) 1329 { 1330 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 1331 mifi_t mifi, iif; 1332 struct mif6 *mifp; 1333 int plen = m->m_pkthdr.len; 1334 struct in6_addr src0, dst0; /* copies for local work */ 1335 u_int32_t iszone, idzone, oszone, odzone; 1336 int error = 0; 1337 1338 /* 1339 * Macro to send packet on mif. Since RSVP packets don't get counted on 1340 * input, they shouldn't get counted on output, so statistics keeping is 1341 * separate. 1342 */ 1343 1344 #define MC6_SEND(ip6, mifp, m) do { \ 1345 if ((mifp)->m6_flags & MIFF_REGISTER) \ 1346 register_send((ip6), (mifp), (m)); \ 1347 else \ 1348 phyint_send((ip6), (mifp), (m)); \ 1349 } while (/*CONSTCOND*/ 0) 1350 1351 /* 1352 * Don't forward if it didn't arrive from the parent mif 1353 * for its origin. 1354 */ 1355 mifi = rt->mf6c_parent; 1356 if ((mifi >= nummifs) || (mif6table[mifi].m6_ifp != ifp)) { 1357 /* came in the wrong interface */ 1358 #ifdef MRT6DEBUG 1359 if (V_mrt6debug & DEBUG_FORWARD) 1360 log(LOG_DEBUG, 1361 "wrong if: ifid %d mifi %d mififid %x\n", 1362 ifp->if_index, mifi, 1363 mif6table[mifi].m6_ifp->if_index); 1364 #endif 1365 mrt6stat.mrt6s_wrong_if++; 1366 rt->mf6c_wrong_if++; 1367 /* 1368 * If we are doing PIM processing, and we are forwarding 1369 * packets on this interface, send a message to the 1370 * routing daemon. 1371 */ 1372 /* have to make sure this is a valid mif */ 1373 if (mifi < nummifs && mif6table[mifi].m6_ifp) 1374 if (V_pim6 && (m->m_flags & M_LOOP) == 0) { 1375 /* 1376 * Check the M_LOOP flag to avoid an 1377 * unnecessary PIM assert. 1378 * XXX: M_LOOP is an ad-hoc hack... 1379 */ 1380 static struct sockaddr_in6 sin6 = 1381 { sizeof(sin6), AF_INET6 }; 1382 1383 struct mbuf *mm; 1384 struct mrt6msg *im; 1385 #ifdef MRT6_OINIT 1386 struct omrt6msg *oim; 1387 #endif 1388 1389 mm = m_copy(m, 0, sizeof(struct ip6_hdr)); 1390 if (mm && 1391 (M_HASCL(mm) || 1392 mm->m_len < sizeof(struct ip6_hdr))) 1393 mm = m_pullup(mm, sizeof(struct ip6_hdr)); 1394 if (mm == NULL) 1395 return (ENOBUFS); 1396 1397 #ifdef MRT6_OINIT 1398 oim = NULL; 1399 #endif 1400 im = NULL; 1401 switch (V_ip6_mrouter_ver) { 1402 #ifdef MRT6_OINIT 1403 case MRT6_OINIT: 1404 oim = mtod(mm, struct omrt6msg *); 1405 oim->im6_msgtype = MRT6MSG_WRONGMIF; 1406 oim->im6_mbz = 0; 1407 break; 1408 #endif 1409 case MRT6_INIT: 1410 im = mtod(mm, struct mrt6msg *); 1411 im->im6_msgtype = MRT6MSG_WRONGMIF; 1412 im->im6_mbz = 0; 1413 break; 1414 default: 1415 m_freem(mm); 1416 return (EINVAL); 1417 } 1418 1419 for (mifp = mif6table, iif = 0; 1420 iif < nummifs && mifp && 1421 mifp->m6_ifp != ifp; 1422 mifp++, iif++) 1423 ; 1424 1425 switch (V_ip6_mrouter_ver) { 1426 #ifdef MRT6_OINIT 1427 case MRT6_OINIT: 1428 oim->im6_mif = iif; 1429 sin6.sin6_addr = oim->im6_src; 1430 break; 1431 #endif 1432 case MRT6_INIT: 1433 im->im6_mif = iif; 1434 sin6.sin6_addr = im->im6_src; 1435 break; 1436 } 1437 1438 mrt6stat.mrt6s_upcalls++; 1439 1440 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1441 #ifdef MRT6DEBUG 1442 if (V_mrt6debug) 1443 log(LOG_WARNING, "mdq, ip6_mrouter socket queue full\n"); 1444 #endif 1445 ++mrt6stat.mrt6s_upq_sockfull; 1446 return (ENOBUFS); 1447 } /* if socket Q full */ 1448 } /* if PIM */ 1449 return (0); 1450 } /* if wrong iif */ 1451 1452 /* If I sourced this packet, it counts as output, else it was input. */ 1453 if (m->m_pkthdr.rcvif == NULL) { 1454 /* XXX: is rcvif really NULL when output?? */ 1455 mif6table[mifi].m6_pkt_out++; 1456 mif6table[mifi].m6_bytes_out += plen; 1457 } else { 1458 mif6table[mifi].m6_pkt_in++; 1459 mif6table[mifi].m6_bytes_in += plen; 1460 } 1461 rt->mf6c_pkt_cnt++; 1462 rt->mf6c_byte_cnt += plen; 1463 1464 /* 1465 * For each mif, forward a copy of the packet if there are group 1466 * members downstream on the interface. 1467 */ 1468 src0 = ip6->ip6_src; 1469 dst0 = ip6->ip6_dst; 1470 if ((error = in6_setscope(&src0, ifp, &iszone)) != 0 || 1471 (error = in6_setscope(&dst0, ifp, &idzone)) != 0) { 1472 V_ip6stat.ip6s_badscope++; 1473 return (error); 1474 } 1475 for (mifp = mif6table, mifi = 0; mifi < nummifs; mifp++, mifi++) { 1476 if (IF_ISSET(mifi, &rt->mf6c_ifset)) { 1477 /* 1478 * check if the outgoing packet is going to break 1479 * a scope boundary. 1480 * XXX For packets through PIM register tunnel 1481 * interface, we believe a routing daemon. 1482 */ 1483 if (!(mif6table[rt->mf6c_parent].m6_flags & 1484 MIFF_REGISTER) && 1485 !(mif6table[mifi].m6_flags & MIFF_REGISTER)) { 1486 if (in6_setscope(&src0, mif6table[mifi].m6_ifp, 1487 &oszone) || 1488 in6_setscope(&dst0, mif6table[mifi].m6_ifp, 1489 &odzone) || 1490 iszone != oszone || 1491 idzone != odzone) { 1492 V_ip6stat.ip6s_badscope++; 1493 continue; 1494 } 1495 } 1496 1497 mifp->m6_pkt_out++; 1498 mifp->m6_bytes_out += plen; 1499 MC6_SEND(ip6, mifp, m); 1500 } 1501 } 1502 return (0); 1503 } 1504 1505 static void 1506 phyint_send(struct ip6_hdr *ip6, struct mif6 *mifp, struct mbuf *m) 1507 { 1508 struct mbuf *mb_copy; 1509 struct ifnet *ifp = mifp->m6_ifp; 1510 int error = 0; 1511 int s = splnet(); /* needs to protect static "ro" below. */ 1512 static struct route_in6 ro; 1513 struct in6_multi *in6m; 1514 struct sockaddr_in6 *dst6; 1515 u_long linkmtu; 1516 1517 /* 1518 * Make a new reference to the packet; make sure that 1519 * the IPv6 header is actually copied, not just referenced, 1520 * so that ip6_output() only scribbles on the copy. 1521 */ 1522 mb_copy = m_copy(m, 0, M_COPYALL); 1523 if (mb_copy && 1524 (M_HASCL(mb_copy) || mb_copy->m_len < sizeof(struct ip6_hdr))) 1525 mb_copy = m_pullup(mb_copy, sizeof(struct ip6_hdr)); 1526 if (mb_copy == NULL) { 1527 splx(s); 1528 return; 1529 } 1530 /* set MCAST flag to the outgoing packet */ 1531 mb_copy->m_flags |= M_MCAST; 1532 1533 /* 1534 * If we sourced the packet, call ip6_output since we may devide 1535 * the packet into fragments when the packet is too big for the 1536 * outgoing interface. 1537 * Otherwise, we can simply send the packet to the interface 1538 * sending queue. 1539 */ 1540 if (m->m_pkthdr.rcvif == NULL) { 1541 struct ip6_moptions im6o; 1542 1543 im6o.im6o_multicast_ifp = ifp; 1544 /* XXX: ip6_output will override ip6->ip6_hlim */ 1545 im6o.im6o_multicast_hlim = ip6->ip6_hlim; 1546 im6o.im6o_multicast_loop = 1; 1547 error = ip6_output(mb_copy, NULL, &ro, 1548 IPV6_FORWARDING, &im6o, NULL, NULL); 1549 1550 #ifdef MRT6DEBUG 1551 if (V_mrt6debug & DEBUG_XMIT) 1552 log(LOG_DEBUG, "phyint_send on mif %d err %d\n", 1553 mifp - mif6table, error); 1554 #endif 1555 splx(s); 1556 return; 1557 } 1558 1559 /* 1560 * If we belong to the destination multicast group 1561 * on the outgoing interface, loop back a copy. 1562 */ 1563 dst6 = (struct sockaddr_in6 *)&ro.ro_dst; 1564 IN6_LOOKUP_MULTI(ip6->ip6_dst, ifp, in6m); 1565 if (in6m != NULL) { 1566 dst6->sin6_len = sizeof(struct sockaddr_in6); 1567 dst6->sin6_family = AF_INET6; 1568 dst6->sin6_addr = ip6->ip6_dst; 1569 ip6_mloopback(ifp, m, (struct sockaddr_in6 *)&ro.ro_dst); 1570 } 1571 /* 1572 * Put the packet into the sending queue of the outgoing interface 1573 * if it would fit in the MTU of the interface. 1574 */ 1575 linkmtu = IN6_LINKMTU(ifp); 1576 if (mb_copy->m_pkthdr.len <= linkmtu || linkmtu < IPV6_MMTU) { 1577 dst6->sin6_len = sizeof(struct sockaddr_in6); 1578 dst6->sin6_family = AF_INET6; 1579 dst6->sin6_addr = ip6->ip6_dst; 1580 /* 1581 * We just call if_output instead of nd6_output here, since 1582 * we need no ND for a multicast forwarded packet...right? 1583 */ 1584 error = (*ifp->if_output)(ifp, mb_copy, 1585 (struct sockaddr *)&ro.ro_dst, NULL); 1586 #ifdef MRT6DEBUG 1587 if (V_mrt6debug & DEBUG_XMIT) 1588 log(LOG_DEBUG, "phyint_send on mif %d err %d\n", 1589 mifp - mif6table, error); 1590 #endif 1591 } else { 1592 /* 1593 * pMTU discovery is intentionally disabled by default, since 1594 * various router may notify pMTU in multicast, which can be 1595 * a DDoS to a router 1596 */ 1597 if (V_ip6_mcast_pmtu) 1598 icmp6_error(mb_copy, ICMP6_PACKET_TOO_BIG, 0, linkmtu); 1599 else { 1600 #ifdef MRT6DEBUG 1601 if (V_mrt6debug & DEBUG_XMIT) { 1602 char ip6bufs[INET6_ADDRSTRLEN]; 1603 char ip6bufd[INET6_ADDRSTRLEN]; 1604 log(LOG_DEBUG, 1605 "phyint_send: packet too big on %s o %s " 1606 "g %s size %d(discarded)\n", 1607 if_name(ifp), 1608 ip6_sprintf(ip6bufs, &ip6->ip6_src), 1609 ip6_sprintf(ip6bufd, &ip6->ip6_dst), 1610 mb_copy->m_pkthdr.len); 1611 } 1612 #endif /* MRT6DEBUG */ 1613 m_freem(mb_copy); /* simply discard the packet */ 1614 } 1615 } 1616 1617 splx(s); 1618 } 1619 1620 static int 1621 register_send(struct ip6_hdr *ip6, struct mif6 *mif, struct mbuf *m) 1622 { 1623 struct mbuf *mm; 1624 int i, len = m->m_pkthdr.len; 1625 static struct sockaddr_in6 sin6 = { sizeof(sin6), AF_INET6 }; 1626 struct mrt6msg *im6; 1627 1628 #ifdef MRT6DEBUG 1629 if (V_mrt6debug) { 1630 char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN]; 1631 log(LOG_DEBUG, "** IPv6 register_send **\n src %s dst %s\n", 1632 ip6_sprintf(ip6bufs, &ip6->ip6_src), 1633 ip6_sprintf(ip6bufd, &ip6->ip6_dst)); 1634 } 1635 #endif 1636 ++pim6stat.pim6s_snd_registers; 1637 1638 /* Make a copy of the packet to send to the user level process */ 1639 MGETHDR(mm, M_DONTWAIT, MT_HEADER); 1640 if (mm == NULL) 1641 return (ENOBUFS); 1642 mm->m_pkthdr.rcvif = NULL; 1643 mm->m_data += max_linkhdr; 1644 mm->m_len = sizeof(struct ip6_hdr); 1645 1646 if ((mm->m_next = m_copy(m, 0, M_COPYALL)) == NULL) { 1647 m_freem(mm); 1648 return (ENOBUFS); 1649 } 1650 i = MHLEN - M_LEADINGSPACE(mm); 1651 if (i > len) 1652 i = len; 1653 mm = m_pullup(mm, i); 1654 if (mm == NULL) 1655 return (ENOBUFS); 1656 /* TODO: check it! */ 1657 mm->m_pkthdr.len = len + sizeof(struct ip6_hdr); 1658 1659 /* 1660 * Send message to routing daemon 1661 */ 1662 sin6.sin6_addr = ip6->ip6_src; 1663 1664 im6 = mtod(mm, struct mrt6msg *); 1665 im6->im6_msgtype = MRT6MSG_WHOLEPKT; 1666 im6->im6_mbz = 0; 1667 1668 im6->im6_mif = mif - mif6table; 1669 1670 /* iif info is not given for reg. encap.n */ 1671 mrt6stat.mrt6s_upcalls++; 1672 1673 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1674 #ifdef MRT6DEBUG 1675 if (V_mrt6debug) 1676 log(LOG_WARNING, 1677 "register_send: ip6_mrouter socket queue full\n"); 1678 #endif 1679 ++mrt6stat.mrt6s_upq_sockfull; 1680 return (ENOBUFS); 1681 } 1682 return (0); 1683 } 1684 1685 /* 1686 * PIM sparse mode hook 1687 * Receives the pim control messages, and passes them up to the listening 1688 * socket, using rip6_input. 1689 * The only message processed is the REGISTER pim message; the pim header 1690 * is stripped off, and the inner packet is passed to register_mforward. 1691 */ 1692 int 1693 pim6_input(struct mbuf **mp, int *offp, int proto) 1694 { 1695 struct pim *pim; /* pointer to a pim struct */ 1696 struct ip6_hdr *ip6; 1697 int pimlen; 1698 struct mbuf *m = *mp; 1699 int minlen; 1700 int off = *offp; 1701 1702 ++pim6stat.pim6s_rcv_total; 1703 1704 ip6 = mtod(m, struct ip6_hdr *); 1705 pimlen = m->m_pkthdr.len - *offp; 1706 1707 /* 1708 * Validate lengths 1709 */ 1710 if (pimlen < PIM_MINLEN) { 1711 ++pim6stat.pim6s_rcv_tooshort; 1712 #ifdef MRT6DEBUG 1713 if (V_mrt6debug & DEBUG_PIM) 1714 log(LOG_DEBUG,"pim6_input: PIM packet too short\n"); 1715 #endif 1716 m_freem(m); 1717 return (IPPROTO_DONE); 1718 } 1719 1720 /* 1721 * if the packet is at least as big as a REGISTER, go ahead 1722 * and grab the PIM REGISTER header size, to avoid another 1723 * possible m_pullup() later. 1724 * 1725 * PIM_MINLEN == pimhdr + u_int32 == 8 1726 * PIM6_REG_MINLEN == pimhdr + reghdr + eip6hdr == 4 + 4 + 40 1727 */ 1728 minlen = (pimlen >= PIM6_REG_MINLEN) ? PIM6_REG_MINLEN : PIM_MINLEN; 1729 1730 /* 1731 * Make sure that the IP6 and PIM headers in contiguous memory, and 1732 * possibly the PIM REGISTER header 1733 */ 1734 #ifndef PULLDOWN_TEST 1735 IP6_EXTHDR_CHECK(m, off, minlen, IPPROTO_DONE); 1736 /* adjust pointer */ 1737 ip6 = mtod(m, struct ip6_hdr *); 1738 1739 /* adjust mbuf to point to the PIM header */ 1740 pim = (struct pim *)((caddr_t)ip6 + off); 1741 #else 1742 IP6_EXTHDR_GET(pim, struct pim *, m, off, minlen); 1743 if (pim == NULL) { 1744 pim6stat.pim6s_rcv_tooshort++; 1745 return (IPPROTO_DONE); 1746 } 1747 #endif 1748 1749 #define PIM6_CHECKSUM 1750 #ifdef PIM6_CHECKSUM 1751 { 1752 int cksumlen; 1753 1754 /* 1755 * Validate checksum. 1756 * If PIM REGISTER, exclude the data packet 1757 */ 1758 if (pim->pim_type == PIM_REGISTER) 1759 cksumlen = PIM_MINLEN; 1760 else 1761 cksumlen = pimlen; 1762 1763 if (in6_cksum(m, IPPROTO_PIM, off, cksumlen)) { 1764 ++pim6stat.pim6s_rcv_badsum; 1765 #ifdef MRT6DEBUG 1766 if (V_mrt6debug & DEBUG_PIM) 1767 log(LOG_DEBUG, 1768 "pim6_input: invalid checksum\n"); 1769 #endif 1770 m_freem(m); 1771 return (IPPROTO_DONE); 1772 } 1773 } 1774 #endif /* PIM_CHECKSUM */ 1775 1776 /* PIM version check */ 1777 if (pim->pim_ver != PIM_VERSION) { 1778 ++pim6stat.pim6s_rcv_badversion; 1779 #ifdef MRT6DEBUG 1780 log(LOG_ERR, 1781 "pim6_input: incorrect version %d, expecting %d\n", 1782 pim->pim_ver, PIM_VERSION); 1783 #endif 1784 m_freem(m); 1785 return (IPPROTO_DONE); 1786 } 1787 1788 if (pim->pim_type == PIM_REGISTER) { 1789 /* 1790 * since this is a REGISTER, we'll make a copy of the register 1791 * headers ip6+pim+u_int32_t+encap_ip6, to be passed up to the 1792 * routing daemon. 1793 */ 1794 static struct sockaddr_in6 dst = { sizeof(dst), AF_INET6 }; 1795 1796 struct mbuf *mcp; 1797 struct ip6_hdr *eip6; 1798 u_int32_t *reghdr; 1799 int rc; 1800 #ifdef MRT6DEBUG 1801 char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN]; 1802 #endif 1803 1804 ++pim6stat.pim6s_rcv_registers; 1805 1806 if ((reg_mif_num >= nummifs) || (reg_mif_num == (mifi_t) -1)) { 1807 #ifdef MRT6DEBUG 1808 if (V_mrt6debug & DEBUG_PIM) 1809 log(LOG_DEBUG, 1810 "pim6_input: register mif not set: %d\n", 1811 reg_mif_num); 1812 #endif 1813 m_freem(m); 1814 return (IPPROTO_DONE); 1815 } 1816 1817 reghdr = (u_int32_t *)(pim + 1); 1818 1819 if ((ntohl(*reghdr) & PIM_NULL_REGISTER)) 1820 goto pim6_input_to_daemon; 1821 1822 /* 1823 * Validate length 1824 */ 1825 if (pimlen < PIM6_REG_MINLEN) { 1826 ++pim6stat.pim6s_rcv_tooshort; 1827 ++pim6stat.pim6s_rcv_badregisters; 1828 #ifdef MRT6DEBUG 1829 log(LOG_ERR, 1830 "pim6_input: register packet size too " 1831 "small %d from %s\n", 1832 pimlen, ip6_sprintf(ip6bufs, &ip6->ip6_src)); 1833 #endif 1834 m_freem(m); 1835 return (IPPROTO_DONE); 1836 } 1837 1838 eip6 = (struct ip6_hdr *) (reghdr + 1); 1839 #ifdef MRT6DEBUG 1840 if (V_mrt6debug & DEBUG_PIM) 1841 log(LOG_DEBUG, 1842 "pim6_input[register], eip6: %s -> %s, " 1843 "eip6 plen %d\n", 1844 ip6_sprintf(ip6bufs, &eip6->ip6_src), 1845 ip6_sprintf(ip6bufd, &eip6->ip6_dst), 1846 ntohs(eip6->ip6_plen)); 1847 #endif 1848 1849 /* verify the version number of the inner packet */ 1850 if ((eip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) { 1851 ++pim6stat.pim6s_rcv_badregisters; 1852 #ifdef MRT6DEBUG 1853 log(LOG_DEBUG, "pim6_input: invalid IP version (%d) " 1854 "of the inner packet\n", 1855 (eip6->ip6_vfc & IPV6_VERSION)); 1856 #endif 1857 m_freem(m); 1858 return (IPPROTO_NONE); 1859 } 1860 1861 /* verify the inner packet is destined to a mcast group */ 1862 if (!IN6_IS_ADDR_MULTICAST(&eip6->ip6_dst)) { 1863 ++pim6stat.pim6s_rcv_badregisters; 1864 #ifdef MRT6DEBUG 1865 if (V_mrt6debug & DEBUG_PIM) 1866 log(LOG_DEBUG, 1867 "pim6_input: inner packet of register " 1868 "is not multicast %s\n", 1869 ip6_sprintf(ip6bufd, &eip6->ip6_dst)); 1870 #endif 1871 m_freem(m); 1872 return (IPPROTO_DONE); 1873 } 1874 1875 /* 1876 * make a copy of the whole header to pass to the daemon later. 1877 */ 1878 mcp = m_copy(m, 0, off + PIM6_REG_MINLEN); 1879 if (mcp == NULL) { 1880 #ifdef MRT6DEBUG 1881 log(LOG_ERR, 1882 "pim6_input: pim register: " 1883 "could not copy register head\n"); 1884 #endif 1885 m_freem(m); 1886 return (IPPROTO_DONE); 1887 } 1888 1889 /* 1890 * forward the inner ip6 packet; point m_data at the inner ip6. 1891 */ 1892 m_adj(m, off + PIM_MINLEN); 1893 #ifdef MRT6DEBUG 1894 if (V_mrt6debug & DEBUG_PIM) { 1895 log(LOG_DEBUG, 1896 "pim6_input: forwarding decapsulated register: " 1897 "src %s, dst %s, mif %d\n", 1898 ip6_sprintf(ip6bufs, &eip6->ip6_src), 1899 ip6_sprintf(ip6bufd, &eip6->ip6_dst), 1900 reg_mif_num); 1901 } 1902 #endif 1903 1904 rc = if_simloop(mif6table[reg_mif_num].m6_ifp, m, 1905 dst.sin6_family, 0); 1906 1907 /* prepare the register head to send to the mrouting daemon */ 1908 m = mcp; 1909 } 1910 1911 /* 1912 * Pass the PIM message up to the daemon; if it is a register message 1913 * pass the 'head' only up to the daemon. This includes the 1914 * encapsulator ip6 header, pim header, register header and the 1915 * encapsulated ip6 header. 1916 */ 1917 pim6_input_to_daemon: 1918 rip6_input(&m, offp, proto); 1919 return (IPPROTO_DONE); 1920 } 1921