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sys/netinet6/ip6_mroute.c
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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: releng/7.3/sys/netinet6/ip6_mroute.c 182632 2008-09-01 19:23:04Z obrien $"); 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> 104 105 #include <net/if.h> 106 #include <net/if_types.h> 107 #include <net/raw_cb.h> 108 #include <net/route.h> 109 110 #include <netinet/in.h> 111 #include <netinet/in_var.h> 112 #include <netinet/icmp6.h> 113 114 #include <netinet/ip6.h> 115 #include <netinet6/ip6_var.h> 116 #include <netinet6/scope6_var.h> 117 #include <netinet6/nd6.h> 118 #include <netinet6/ip6_mroute.h> 119 #include <netinet6/ip6protosw.h> 120 #include <netinet6/pim6.h> 121 #include <netinet6/pim6_var.h> 122 123 static MALLOC_DEFINE(M_MRTABLE6, "mf6c", "multicast forwarding cache entry"); 124 125 /* XXX: this is a very common idiom; move to <sys/mbuf.h> ? */ 126 #define M_HASCL(m) ((m)->m_flags & M_EXT) 127 128 static int ip6_mdq(struct mbuf *, struct ifnet *, struct mf6c *); 129 static void phyint_send(struct ip6_hdr *, struct mif6 *, struct mbuf *); 130 131 static int set_pim6(int *); 132 static int socket_send __P((struct socket *, struct mbuf *, 133 struct sockaddr_in6 *)); 134 static int register_send __P((struct ip6_hdr *, struct mif6 *, 135 struct mbuf *)); 136 137 extern struct domain inet6domain; 138 139 /* XXX: referenced from ip_mroute.c for dynamically loading this code. */ 140 struct ip6protosw in6_pim_protosw = { 141 .pr_type = SOCK_RAW, 142 .pr_domain = &inet6domain, 143 .pr_protocol = IPPROTO_PIM, 144 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 145 .pr_input = pim6_input, 146 .pr_output = rip6_output, 147 .pr_ctloutput = rip6_ctloutput, 148 .pr_usrreqs = &rip6_usrreqs 149 }; 150 151 static int ip6_mrouter_ver = 0; 152 153 SYSCTL_DECL(_net_inet6); 154 SYSCTL_DECL(_net_inet6_ip6); 155 SYSCTL_NODE(_net_inet6, IPPROTO_PIM, pim, CTLFLAG_RW, 0, "PIM"); 156 157 static struct mrt6stat mrt6stat; 158 SYSCTL_STRUCT(_net_inet6_ip6, OID_AUTO, mrt6stat, CTLFLAG_RW, 159 &mrt6stat, mrt6stat, 160 "Multicast Routing Statistics (struct mrt6stat, netinet6/ip6_mroute.h)"); 161 162 #define NO_RTE_FOUND 0x1 163 #define RTE_FOUND 0x2 164 165 static struct mf6c *mf6ctable[MF6CTBLSIZ]; 166 SYSCTL_OPAQUE(_net_inet6_ip6, OID_AUTO, mf6ctable, CTLFLAG_RD, 167 &mf6ctable, sizeof(mf6ctable), "S,*mf6ctable[MF6CTBLSIZ]", 168 "Multicast Forwarding Table (struct *mf6ctable[MF6CTBLSIZ], " 169 "netinet6/ip6_mroute.h)"); 170 171 static u_char n6expire[MF6CTBLSIZ]; 172 173 static struct mif6 mif6table[MAXMIFS]; 174 SYSCTL_OPAQUE(_net_inet6_ip6, OID_AUTO, mif6table, CTLFLAG_RD, 175 &mif6table, sizeof(mif6table), "S,vif[MAXMIFS]", 176 "Multicast Interfaces (struct mif[MAXMIFS], netinet6/ip6_mroute.h)"); 177 178 #ifdef MRT6DEBUG 179 static u_int mrt6debug = 0; /* debug level */ 180 #define DEBUG_MFC 0x02 181 #define DEBUG_FORWARD 0x04 182 #define DEBUG_EXPIRE 0x08 183 #define DEBUG_XMIT 0x10 184 #define DEBUG_REG 0x20 185 #define DEBUG_PIM 0x40 186 #endif 187 188 static void expire_upcalls(void *); 189 #define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */ 190 #define UPCALL_EXPIRE 6 /* number of timeouts */ 191 192 #ifdef INET 193 #ifdef MROUTING 194 extern struct socket *ip_mrouter; 195 #endif 196 #endif 197 198 /* 199 * 'Interfaces' associated with decapsulator (so we can tell 200 * packets that went through it from ones that get reflected 201 * by a broken gateway). Different from IPv4 register_if, 202 * these interfaces are linked into the system ifnet list, 203 * because per-interface IPv6 statistics are maintained in 204 * ifp->if_afdata. But it does not have any routes point 205 * to them. I.e., packets can't be sent this way. They 206 * only exist as a placeholder for multicast source 207 * verification. 208 */ 209 static struct ifnet *multicast_register_if6; 210 211 #define ENCAP_HOPS 64 212 213 /* 214 * Private variables. 215 */ 216 static mifi_t nummifs = 0; 217 static mifi_t reg_mif_num = (mifi_t)-1; 218 219 static struct pim6stat pim6stat; 220 SYSCTL_STRUCT(_net_inet6_pim, PIM6CTL_STATS, stats, CTLFLAG_RD, 221 &pim6stat, pim6stat, 222 "PIM Statistics (struct pim6stat, netinet6/pim_var.h)"); 223 224 static int pim6; 225 226 /* 227 * Hash function for a source, group entry 228 */ 229 #define MF6CHASH(a, g) MF6CHASHMOD((a).s6_addr32[0] ^ (a).s6_addr32[1] ^ \ 230 (a).s6_addr32[2] ^ (a).s6_addr32[3] ^ \ 231 (g).s6_addr32[0] ^ (g).s6_addr32[1] ^ \ 232 (g).s6_addr32[2] ^ (g).s6_addr32[3]) 233 234 /* 235 * Find a route for a given origin IPv6 address and Multicast group address. 236 */ 237 #define MF6CFIND(o, g, rt) do { \ 238 struct mf6c *_rt = mf6ctable[MF6CHASH(o,g)]; \ 239 rt = NULL; \ 240 mrt6stat.mrt6s_mfc_lookups++; \ 241 while (_rt) { \ 242 if (IN6_ARE_ADDR_EQUAL(&_rt->mf6c_origin.sin6_addr, &(o)) && \ 243 IN6_ARE_ADDR_EQUAL(&_rt->mf6c_mcastgrp.sin6_addr, &(g)) && \ 244 (_rt->mf6c_stall == NULL)) { \ 245 rt = _rt; \ 246 break; \ 247 } \ 248 _rt = _rt->mf6c_next; \ 249 } \ 250 if (rt == NULL) { \ 251 mrt6stat.mrt6s_mfc_misses++; \ 252 } \ 253 } while (/*CONSTCOND*/ 0) 254 255 /* 256 * Macros to compute elapsed time efficiently 257 * Borrowed from Van Jacobson's scheduling code 258 * XXX: replace with timersub() ? 259 */ 260 #define TV_DELTA(a, b, delta) do { \ 261 int xxs; \ 262 \ 263 delta = (a).tv_usec - (b).tv_usec; \ 264 if ((xxs = (a).tv_sec - (b).tv_sec)) { \ 265 switch (xxs) { \ 266 case 2: \ 267 delta += 1000000; \ 268 /* FALLTHROUGH */ \ 269 case 1: \ 270 delta += 1000000; \ 271 break; \ 272 default: \ 273 delta += (1000000 * xxs); \ 274 } \ 275 } \ 276 } while (/*CONSTCOND*/ 0) 277 278 /* XXX: replace with timercmp(a, b, <) ? */ 279 #define TV_LT(a, b) (((a).tv_usec < (b).tv_usec && \ 280 (a).tv_sec <= (b).tv_sec) || (a).tv_sec < (b).tv_sec) 281 282 #ifdef UPCALL_TIMING 283 #define UPCALL_MAX 50 284 static u_long upcall_data[UPCALL_MAX + 1]; 285 static void collate(); 286 #endif /* UPCALL_TIMING */ 287 288 static int get_sg_cnt(struct sioc_sg_req6 *); 289 static int get_mif6_cnt(struct sioc_mif_req6 *); 290 static int ip6_mrouter_init(struct socket *, int, int); 291 static int add_m6if(struct mif6ctl *); 292 static int del_m6if(mifi_t *); 293 static int add_m6fc(struct mf6cctl *); 294 static int del_m6fc(struct mf6cctl *); 295 296 static struct callout expire_upcalls_ch; 297 298 int X_ip6_mforward(struct ip6_hdr *ip6, struct ifnet *ifp, struct mbuf *m); 299 int X_ip6_mrouter_done(void); 300 int X_ip6_mrouter_set(struct socket *so, struct sockopt *sopt); 301 int X_ip6_mrouter_get(struct socket *so, struct sockopt *sopt); 302 int X_mrt6_ioctl(int cmd, caddr_t data); 303 304 /* 305 * Handle MRT setsockopt commands to modify the multicast routing tables. 306 */ 307 int 308 X_ip6_mrouter_set(struct socket *so, struct sockopt *sopt) 309 { 310 int error = 0; 311 int optval; 312 struct mif6ctl mifc; 313 struct mf6cctl mfcc; 314 mifi_t mifi; 315 316 if (so != ip6_mrouter && sopt->sopt_name != MRT6_INIT) 317 return (EACCES); 318 319 switch (sopt->sopt_name) { 320 case MRT6_INIT: 321 #ifdef MRT6_OINIT 322 case MRT6_OINIT: 323 #endif 324 error = sooptcopyin(sopt, &optval, sizeof(optval), 325 sizeof(optval)); 326 if (error) 327 break; 328 error = ip6_mrouter_init(so, optval, sopt->sopt_name); 329 break; 330 case MRT6_DONE: 331 error = X_ip6_mrouter_done(); 332 break; 333 case MRT6_ADD_MIF: 334 error = sooptcopyin(sopt, &mifc, sizeof(mifc), sizeof(mifc)); 335 if (error) 336 break; 337 error = add_m6if(&mifc); 338 break; 339 case MRT6_ADD_MFC: 340 error = sooptcopyin(sopt, &mfcc, sizeof(mfcc), sizeof(mfcc)); 341 if (error) 342 break; 343 error = add_m6fc(&mfcc); 344 break; 345 case MRT6_DEL_MFC: 346 error = sooptcopyin(sopt, &mfcc, sizeof(mfcc), sizeof(mfcc)); 347 if (error) 348 break; 349 error = del_m6fc(&mfcc); 350 break; 351 case MRT6_DEL_MIF: 352 error = sooptcopyin(sopt, &mifi, sizeof(mifi), sizeof(mifi)); 353 if (error) 354 break; 355 error = del_m6if(&mifi); 356 break; 357 case MRT6_PIM: 358 error = sooptcopyin(sopt, &optval, sizeof(optval), 359 sizeof(optval)); 360 if (error) 361 break; 362 error = set_pim6(&optval); 363 break; 364 default: 365 error = EOPNOTSUPP; 366 break; 367 } 368 369 return (error); 370 } 371 372 /* 373 * Handle MRT getsockopt commands 374 */ 375 int 376 X_ip6_mrouter_get(struct socket *so, struct sockopt *sopt) 377 { 378 int error = 0; 379 380 if (so != ip6_mrouter) 381 return (EACCES); 382 383 switch (sopt->sopt_name) { 384 case MRT6_PIM: 385 error = sooptcopyout(sopt, &pim6, sizeof(pim6)); 386 break; 387 } 388 return (error); 389 } 390 391 /* 392 * Handle ioctl commands to obtain information from the cache 393 */ 394 int 395 X_mrt6_ioctl(int cmd, caddr_t data) 396 { 397 switch (cmd) { 398 case SIOCGETSGCNT_IN6: 399 return (get_sg_cnt((struct sioc_sg_req6 *)data)); 400 case SIOCGETMIFCNT_IN6: 401 return (get_mif6_cnt((struct sioc_mif_req6 *)data)); 402 default: 403 return (EINVAL); 404 } 405 } 406 407 /* 408 * returns the packet, byte, rpf-failure count for the source group provided 409 */ 410 static int 411 get_sg_cnt(struct sioc_sg_req6 *req) 412 { 413 struct mf6c *rt; 414 int s; 415 416 s = splnet(); 417 MF6CFIND(req->src.sin6_addr, req->grp.sin6_addr, rt); 418 splx(s); 419 if (rt != NULL) { 420 req->pktcnt = rt->mf6c_pkt_cnt; 421 req->bytecnt = rt->mf6c_byte_cnt; 422 req->wrong_if = rt->mf6c_wrong_if; 423 } else 424 return (ESRCH); 425 #if 0 426 req->pktcnt = req->bytecnt = req->wrong_if = 0xffffffff; 427 #endif 428 429 return (0); 430 } 431 432 /* 433 * returns the input and output packet and byte counts on the mif provided 434 */ 435 static int 436 get_mif6_cnt(struct sioc_mif_req6 *req) 437 { 438 mifi_t mifi = req->mifi; 439 440 if (mifi >= nummifs) 441 return (EINVAL); 442 443 req->icount = mif6table[mifi].m6_pkt_in; 444 req->ocount = mif6table[mifi].m6_pkt_out; 445 req->ibytes = mif6table[mifi].m6_bytes_in; 446 req->obytes = mif6table[mifi].m6_bytes_out; 447 448 return (0); 449 } 450 451 static int 452 set_pim6(int *i) 453 { 454 if ((*i != 1) && (*i != 0)) 455 return (EINVAL); 456 457 pim6 = *i; 458 459 return (0); 460 } 461 462 /* 463 * Enable multicast routing 464 */ 465 static int 466 ip6_mrouter_init(struct socket *so, int v, int cmd) 467 { 468 #ifdef MRT6DEBUG 469 if (mrt6debug) 470 log(LOG_DEBUG, 471 "ip6_mrouter_init: so_type = %d, pr_protocol = %d\n", 472 so->so_type, so->so_proto->pr_protocol); 473 #endif 474 475 if (so->so_type != SOCK_RAW || 476 so->so_proto->pr_protocol != IPPROTO_ICMPV6) 477 return (EOPNOTSUPP); 478 479 if (v != 1) 480 return (ENOPROTOOPT); 481 482 if (ip6_mrouter != NULL) 483 return (EADDRINUSE); 484 485 ip6_mrouter = so; 486 ip6_mrouter_ver = cmd; 487 488 bzero((caddr_t)mf6ctable, sizeof(mf6ctable)); 489 bzero((caddr_t)n6expire, sizeof(n6expire)); 490 491 pim6 = 0;/* used for stubbing out/in pim stuff */ 492 493 callout_init(&expire_upcalls_ch, 0); 494 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 495 expire_upcalls, NULL); 496 497 #ifdef MRT6DEBUG 498 if (mrt6debug) 499 log(LOG_DEBUG, "ip6_mrouter_init\n"); 500 #endif 501 502 return (0); 503 } 504 505 /* 506 * Disable multicast routing 507 */ 508 int 509 X_ip6_mrouter_done(void) 510 { 511 mifi_t mifi; 512 int i; 513 struct mf6c *rt; 514 struct rtdetq *rte; 515 int s; 516 517 s = splnet(); 518 519 /* 520 * For each phyint in use, disable promiscuous reception of all IPv6 521 * multicasts. 522 */ 523 #ifdef INET 524 #ifdef MROUTING 525 /* 526 * If there is still IPv4 multicast routing daemon, 527 * we remain interfaces to receive all muliticasted packets. 528 * XXX: there may be an interface in which the IPv4 multicast 529 * daemon is not interested... 530 */ 531 if (!ip_mrouter) 532 #endif 533 #endif 534 { 535 for (mifi = 0; mifi < nummifs; mifi++) { 536 if (mif6table[mifi].m6_ifp && 537 !(mif6table[mifi].m6_flags & MIFF_REGISTER)) { 538 if_allmulti(mif6table[mifi].m6_ifp, 0); 539 } 540 } 541 } 542 bzero((caddr_t)mif6table, sizeof(mif6table)); 543 nummifs = 0; 544 545 pim6 = 0; /* used to stub out/in pim specific code */ 546 547 callout_stop(&expire_upcalls_ch); 548 549 /* 550 * Free all multicast forwarding cache entries. 551 */ 552 for (i = 0; i < MF6CTBLSIZ; i++) { 553 rt = mf6ctable[i]; 554 while (rt) { 555 struct mf6c *frt; 556 557 for (rte = rt->mf6c_stall; rte != NULL; ) { 558 struct rtdetq *n = rte->next; 559 560 m_free(rte->m); 561 free(rte, M_MRTABLE6); 562 rte = n; 563 } 564 frt = rt; 565 rt = rt->mf6c_next; 566 free(frt, M_MRTABLE6); 567 } 568 } 569 570 bzero((caddr_t)mf6ctable, sizeof(mf6ctable)); 571 572 /* 573 * Reset register interface 574 */ 575 if (reg_mif_num != (mifi_t)-1 && multicast_register_if6 != NULL) { 576 if_detach(multicast_register_if6); 577 if_free(multicast_register_if6); 578 reg_mif_num = (mifi_t)-1; 579 multicast_register_if6 = NULL; 580 } 581 582 ip6_mrouter = NULL; 583 ip6_mrouter_ver = 0; 584 585 splx(s); 586 587 #ifdef MRT6DEBUG 588 if (mrt6debug) 589 log(LOG_DEBUG, "ip6_mrouter_done\n"); 590 #endif 591 592 return (0); 593 } 594 595 static struct sockaddr_in6 sin6 = { sizeof(sin6), AF_INET6 }; 596 597 /* 598 * Add a mif to the mif table 599 */ 600 static int 601 add_m6if(struct mif6ctl *mifcp) 602 { 603 struct mif6 *mifp; 604 struct ifnet *ifp; 605 int error, s; 606 607 if (mifcp->mif6c_mifi >= MAXMIFS) 608 return (EINVAL); 609 mifp = mif6table + mifcp->mif6c_mifi; 610 if (mifp->m6_ifp) 611 return (EADDRINUSE); /* XXX: is it appropriate? */ 612 if (mifcp->mif6c_pifi == 0 || mifcp->mif6c_pifi > if_index) 613 return (ENXIO); 614 ifp = ifnet_byindex(mifcp->mif6c_pifi); 615 616 if (mifcp->mif6c_flags & MIFF_REGISTER) { 617 if (reg_mif_num == (mifi_t)-1) { 618 ifp = if_alloc(IFT_OTHER); 619 620 if_initname(ifp, "register_mif", 0); 621 ifp->if_flags |= IFF_LOOPBACK; 622 if_attach(ifp); 623 multicast_register_if6 = ifp; 624 reg_mif_num = mifcp->mif6c_mifi; 625 /* 626 * it is impossible to guess the ifindex of the 627 * register interface. So mif6c_pifi is automatically 628 * calculated. 629 */ 630 mifcp->mif6c_pifi = ifp->if_index; 631 } else { 632 ifp = multicast_register_if6; 633 } 634 635 } /* if REGISTER */ 636 else { 637 /* Make sure the interface supports multicast */ 638 if ((ifp->if_flags & IFF_MULTICAST) == 0) 639 return (EOPNOTSUPP); 640 641 s = splnet(); 642 error = if_allmulti(ifp, 1); 643 splx(s); 644 if (error) 645 return (error); 646 } 647 648 s = splnet(); 649 mifp->m6_flags = mifcp->mif6c_flags; 650 mifp->m6_ifp = ifp; 651 652 /* initialize per mif pkt counters */ 653 mifp->m6_pkt_in = 0; 654 mifp->m6_pkt_out = 0; 655 mifp->m6_bytes_in = 0; 656 mifp->m6_bytes_out = 0; 657 splx(s); 658 659 /* Adjust nummifs up if the mifi is higher than nummifs */ 660 if (nummifs <= mifcp->mif6c_mifi) 661 nummifs = mifcp->mif6c_mifi + 1; 662 663 #ifdef MRT6DEBUG 664 if (mrt6debug) 665 log(LOG_DEBUG, 666 "add_mif #%d, phyint %s\n", 667 mifcp->mif6c_mifi, 668 ifp->if_xname); 669 #endif 670 671 return (0); 672 } 673 674 /* 675 * Delete a mif from the mif table 676 */ 677 static int 678 del_m6if(mifi_t *mifip) 679 { 680 struct mif6 *mifp = mif6table + *mifip; 681 mifi_t mifi; 682 struct ifnet *ifp; 683 int s; 684 685 if (*mifip >= nummifs) 686 return (EINVAL); 687 if (mifp->m6_ifp == NULL) 688 return (EINVAL); 689 690 s = splnet(); 691 692 if (!(mifp->m6_flags & MIFF_REGISTER)) { 693 /* 694 * XXX: what if there is yet IPv4 multicast daemon 695 * using the interface? 696 */ 697 ifp = mifp->m6_ifp; 698 699 if_allmulti(ifp, 0); 700 } else { 701 if (reg_mif_num != (mifi_t)-1 && 702 multicast_register_if6 != NULL) { 703 if_detach(multicast_register_if6); 704 if_free(multicast_register_if6); 705 reg_mif_num = (mifi_t)-1; 706 multicast_register_if6 = NULL; 707 } 708 } 709 710 bzero((caddr_t)mifp, sizeof(*mifp)); 711 712 /* Adjust nummifs down */ 713 for (mifi = nummifs; mifi > 0; mifi--) 714 if (mif6table[mifi - 1].m6_ifp) 715 break; 716 nummifs = mifi; 717 718 splx(s); 719 720 #ifdef MRT6DEBUG 721 if (mrt6debug) 722 log(LOG_DEBUG, "del_m6if %d, nummifs %d\n", *mifip, nummifs); 723 #endif 724 725 return (0); 726 } 727 728 /* 729 * Add an mfc entry 730 */ 731 static int 732 add_m6fc(struct mf6cctl *mfccp) 733 { 734 struct mf6c *rt; 735 u_long hash; 736 struct rtdetq *rte; 737 u_short nstl; 738 int s; 739 char ip6bufo[INET6_ADDRSTRLEN], ip6bufg[INET6_ADDRSTRLEN]; 740 741 MF6CFIND(mfccp->mf6cc_origin.sin6_addr, 742 mfccp->mf6cc_mcastgrp.sin6_addr, rt); 743 744 /* If an entry already exists, just update the fields */ 745 if (rt) { 746 #ifdef MRT6DEBUG 747 if (mrt6debug & DEBUG_MFC) { 748 log(LOG_DEBUG, 749 "add_m6fc no upcall h %d o %s g %s p %x\n", 750 ip6_sprintf(ip6bufo, &mfccp->mf6cc_origin.sin6_addr), 751 ip6_sprintf(ip6bufg, &mfccp->mf6cc_mcastgrp.sin6_addr), 752 mfccp->mf6cc_parent); 753 } 754 #endif 755 756 s = splnet(); 757 rt->mf6c_parent = mfccp->mf6cc_parent; 758 rt->mf6c_ifset = mfccp->mf6cc_ifset; 759 splx(s); 760 return (0); 761 } 762 763 /* 764 * Find the entry for which the upcall was made and update 765 */ 766 s = splnet(); 767 hash = MF6CHASH(mfccp->mf6cc_origin.sin6_addr, 768 mfccp->mf6cc_mcastgrp.sin6_addr); 769 for (rt = mf6ctable[hash], nstl = 0; rt; rt = rt->mf6c_next) { 770 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 771 &mfccp->mf6cc_origin.sin6_addr) && 772 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 773 &mfccp->mf6cc_mcastgrp.sin6_addr) && 774 (rt->mf6c_stall != NULL)) { 775 776 if (nstl++) 777 log(LOG_ERR, 778 "add_m6fc: %s o %s g %s p %x dbx %p\n", 779 "multiple kernel entries", 780 ip6_sprintf(ip6bufo, 781 &mfccp->mf6cc_origin.sin6_addr), 782 ip6_sprintf(ip6bufg, 783 &mfccp->mf6cc_mcastgrp.sin6_addr), 784 mfccp->mf6cc_parent, rt->mf6c_stall); 785 786 #ifdef MRT6DEBUG 787 if (mrt6debug & DEBUG_MFC) 788 log(LOG_DEBUG, 789 "add_m6fc o %s g %s p %x dbg %x\n", 790 ip6_sprintf(ip6bufo, 791 &mfccp->mf6cc_origin.sin6_addr), 792 ip6_sprintf(ip6bufg, 793 &mfccp->mf6cc_mcastgrp.sin6_addr), 794 mfccp->mf6cc_parent, rt->mf6c_stall); 795 #endif 796 797 rt->mf6c_origin = mfccp->mf6cc_origin; 798 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 799 rt->mf6c_parent = mfccp->mf6cc_parent; 800 rt->mf6c_ifset = mfccp->mf6cc_ifset; 801 /* initialize pkt counters per src-grp */ 802 rt->mf6c_pkt_cnt = 0; 803 rt->mf6c_byte_cnt = 0; 804 rt->mf6c_wrong_if = 0; 805 806 rt->mf6c_expire = 0; /* Don't clean this guy up */ 807 n6expire[hash]--; 808 809 /* free packets Qed at the end of this entry */ 810 for (rte = rt->mf6c_stall; rte != NULL; ) { 811 struct rtdetq *n = rte->next; 812 ip6_mdq(rte->m, rte->ifp, rt); 813 m_freem(rte->m); 814 #ifdef UPCALL_TIMING 815 collate(&(rte->t)); 816 #endif /* UPCALL_TIMING */ 817 free(rte, M_MRTABLE6); 818 rte = n; 819 } 820 rt->mf6c_stall = NULL; 821 } 822 } 823 824 /* 825 * It is possible that an entry is being inserted without an upcall 826 */ 827 if (nstl == 0) { 828 #ifdef MRT6DEBUG 829 if (mrt6debug & DEBUG_MFC) 830 log(LOG_DEBUG, 831 "add_mfc no upcall h %d o %s g %s p %x\n", 832 hash, 833 ip6_sprintf(ip6bufo, &mfccp->mf6cc_origin.sin6_addr), 834 ip6_sprintf(ip6bufg, &mfccp->mf6cc_mcastgrp.sin6_addr), 835 mfccp->mf6cc_parent); 836 #endif 837 838 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 839 840 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 841 &mfccp->mf6cc_origin.sin6_addr)&& 842 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 843 &mfccp->mf6cc_mcastgrp.sin6_addr)) { 844 845 rt->mf6c_origin = mfccp->mf6cc_origin; 846 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 847 rt->mf6c_parent = mfccp->mf6cc_parent; 848 rt->mf6c_ifset = mfccp->mf6cc_ifset; 849 /* initialize pkt counters per src-grp */ 850 rt->mf6c_pkt_cnt = 0; 851 rt->mf6c_byte_cnt = 0; 852 rt->mf6c_wrong_if = 0; 853 854 if (rt->mf6c_expire) 855 n6expire[hash]--; 856 rt->mf6c_expire = 0; 857 } 858 } 859 if (rt == NULL) { 860 /* no upcall, so make a new entry */ 861 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE6, 862 M_NOWAIT); 863 if (rt == NULL) { 864 splx(s); 865 return (ENOBUFS); 866 } 867 868 /* insert new entry at head of hash chain */ 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 rt->mf6c_expire = 0; 878 rt->mf6c_stall = NULL; 879 880 /* link into table */ 881 rt->mf6c_next = mf6ctable[hash]; 882 mf6ctable[hash] = rt; 883 } 884 } 885 splx(s); 886 return (0); 887 } 888 889 #ifdef UPCALL_TIMING 890 /* 891 * collect delay statistics on the upcalls 892 */ 893 static void 894 collate(struct timeval *t) 895 { 896 u_long d; 897 struct timeval tp; 898 u_long delta; 899 900 GET_TIME(tp); 901 902 if (TV_LT(*t, tp)) 903 { 904 TV_DELTA(tp, *t, delta); 905 906 d = delta >> 10; 907 if (d > UPCALL_MAX) 908 d = UPCALL_MAX; 909 910 ++upcall_data[d]; 911 } 912 } 913 #endif /* UPCALL_TIMING */ 914 915 /* 916 * Delete an mfc entry 917 */ 918 static int 919 del_m6fc(struct mf6cctl *mfccp) 920 { 921 struct sockaddr_in6 origin; 922 struct sockaddr_in6 mcastgrp; 923 struct mf6c *rt; 924 struct mf6c **nptr; 925 u_long hash; 926 int s; 927 928 origin = mfccp->mf6cc_origin; 929 mcastgrp = mfccp->mf6cc_mcastgrp; 930 hash = MF6CHASH(origin.sin6_addr, mcastgrp.sin6_addr); 931 932 #ifdef MRT6DEBUG 933 if (mrt6debug & DEBUG_MFC) { 934 char ip6bufo[INET6_ADDRSTRLEN], ip6bufg[INET6_ADDRSTRLEN]; 935 log(LOG_DEBUG,"del_m6fc orig %s mcastgrp %s\n", 936 ip6_sprintf(ip6bufo, &origin.sin6_addr), 937 ip6_sprintf(ip6bufg, &mcastgrp.sin6_addr)); 938 } 939 #endif 940 941 s = splnet(); 942 943 nptr = &mf6ctable[hash]; 944 while ((rt = *nptr) != NULL) { 945 if (IN6_ARE_ADDR_EQUAL(&origin.sin6_addr, 946 &rt->mf6c_origin.sin6_addr) && 947 IN6_ARE_ADDR_EQUAL(&mcastgrp.sin6_addr, 948 &rt->mf6c_mcastgrp.sin6_addr) && 949 rt->mf6c_stall == NULL) 950 break; 951 952 nptr = &rt->mf6c_next; 953 } 954 if (rt == NULL) { 955 splx(s); 956 return (EADDRNOTAVAIL); 957 } 958 959 *nptr = rt->mf6c_next; 960 free(rt, M_MRTABLE6); 961 962 splx(s); 963 964 return (0); 965 } 966 967 static int 968 socket_send(struct socket *s, struct mbuf *mm, struct sockaddr_in6 *src) 969 { 970 971 if (s) { 972 if (sbappendaddr(&s->so_rcv, 973 (struct sockaddr *)src, 974 mm, (struct mbuf *)0) != 0) { 975 sorwakeup(s); 976 return (0); 977 } 978 } 979 m_freem(mm); 980 return (-1); 981 } 982 983 /* 984 * IPv6 multicast forwarding function. This function assumes that the packet 985 * pointed to by "ip6" has arrived on (or is about to be sent to) the interface 986 * pointed to by "ifp", and the packet is to be relayed to other networks 987 * that have members of the packet's destination IPv6 multicast group. 988 * 989 * The packet is returned unscathed to the caller, unless it is 990 * erroneous, in which case a non-zero return value tells the caller to 991 * discard it. 992 * 993 * NOTE: this implementation assumes that m->m_pkthdr.rcvif is NULL iff 994 * this function is called in the originating context (i.e., not when 995 * forwarding a packet from other node). ip6_output(), which is currently the 996 * only function that calls this function is called in the originating context, 997 * explicitly ensures this condition. It is caller's responsibility to ensure 998 * that if this function is called from somewhere else in the originating 999 * context in the future. 1000 */ 1001 int 1002 X_ip6_mforward(struct ip6_hdr *ip6, struct ifnet *ifp, struct mbuf *m) 1003 { 1004 struct mf6c *rt; 1005 struct mif6 *mifp; 1006 struct mbuf *mm; 1007 int s; 1008 mifi_t mifi; 1009 char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN]; 1010 1011 #ifdef MRT6DEBUG 1012 if (mrt6debug & DEBUG_FORWARD) 1013 log(LOG_DEBUG, "ip6_mforward: src %s, dst %s, ifindex %d\n", 1014 ip6_sprintf(ip6bufs, &ip6->ip6_src), 1015 ip6_sprintf(ip6bufd, &ip6->ip6_dst), 1016 ifp->if_index); 1017 #endif 1018 1019 /* 1020 * Don't forward a packet with Hop limit of zero or one, 1021 * or a packet destined to a local-only group. 1022 */ 1023 if (ip6->ip6_hlim <= 1 || IN6_IS_ADDR_MC_INTFACELOCAL(&ip6->ip6_dst) || 1024 IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst)) 1025 return (0); 1026 ip6->ip6_hlim--; 1027 1028 /* 1029 * Source address check: do not forward packets with unspecified 1030 * source. It was discussed in July 2000, on ipngwg mailing list. 1031 * This is rather more serious than unicast cases, because some 1032 * MLD packets can be sent with the unspecified source address 1033 * (although such packets must normally set 1 to the hop limit field). 1034 */ 1035 if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) { 1036 ip6stat.ip6s_cantforward++; 1037 if (ip6_log_time + ip6_log_interval < time_second) { 1038 ip6_log_time = time_second; 1039 log(LOG_DEBUG, 1040 "cannot forward " 1041 "from %s to %s nxt %d received on %s\n", 1042 ip6_sprintf(ip6bufs, &ip6->ip6_src), 1043 ip6_sprintf(ip6bufd, &ip6->ip6_dst), 1044 ip6->ip6_nxt, 1045 if_name(m->m_pkthdr.rcvif)); 1046 } 1047 return (0); 1048 } 1049 1050 /* 1051 * Determine forwarding mifs from the forwarding cache table 1052 */ 1053 s = splnet(); 1054 MF6CFIND(ip6->ip6_src, ip6->ip6_dst, rt); 1055 1056 /* Entry exists, so forward if necessary */ 1057 if (rt) { 1058 splx(s); 1059 return (ip6_mdq(m, ifp, rt)); 1060 } else { 1061 /* 1062 * If we don't have a route for packet's origin, 1063 * Make a copy of the packet & 1064 * send message to routing daemon 1065 */ 1066 1067 struct mbuf *mb0; 1068 struct rtdetq *rte; 1069 u_long hash; 1070 /* int i, npkts;*/ 1071 #ifdef UPCALL_TIMING 1072 struct timeval tp; 1073 1074 GET_TIME(tp); 1075 #endif /* UPCALL_TIMING */ 1076 1077 mrt6stat.mrt6s_no_route++; 1078 #ifdef MRT6DEBUG 1079 if (mrt6debug & (DEBUG_FORWARD | DEBUG_MFC)) 1080 log(LOG_DEBUG, "ip6_mforward: no rte s %s g %s\n", 1081 ip6_sprintf(ip6bufs, &ip6->ip6_src), 1082 ip6_sprintf(ip6bufd, &ip6->ip6_dst)); 1083 #endif 1084 1085 /* 1086 * Allocate mbufs early so that we don't do extra work if we 1087 * are just going to fail anyway. 1088 */ 1089 rte = (struct rtdetq *)malloc(sizeof(*rte), M_MRTABLE6, 1090 M_NOWAIT); 1091 if (rte == NULL) { 1092 splx(s); 1093 return (ENOBUFS); 1094 } 1095 mb0 = m_copy(m, 0, M_COPYALL); 1096 /* 1097 * Pullup packet header if needed before storing it, 1098 * as other references may modify it in the meantime. 1099 */ 1100 if (mb0 && 1101 (M_HASCL(mb0) || mb0->m_len < sizeof(struct ip6_hdr))) 1102 mb0 = m_pullup(mb0, sizeof(struct ip6_hdr)); 1103 if (mb0 == NULL) { 1104 free(rte, M_MRTABLE6); 1105 splx(s); 1106 return (ENOBUFS); 1107 } 1108 1109 /* is there an upcall waiting for this packet? */ 1110 hash = MF6CHASH(ip6->ip6_src, ip6->ip6_dst); 1111 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 1112 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, 1113 &rt->mf6c_origin.sin6_addr) && 1114 IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, 1115 &rt->mf6c_mcastgrp.sin6_addr) && 1116 (rt->mf6c_stall != NULL)) 1117 break; 1118 } 1119 1120 if (rt == NULL) { 1121 struct mrt6msg *im; 1122 #ifdef MRT6_OINIT 1123 struct omrt6msg *oim; 1124 #endif 1125 1126 /* no upcall, so make a new entry */ 1127 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE6, 1128 M_NOWAIT); 1129 if (rt == NULL) { 1130 free(rte, M_MRTABLE6); 1131 m_freem(mb0); 1132 splx(s); 1133 return (ENOBUFS); 1134 } 1135 /* 1136 * Make a copy of the header to send to the user 1137 * level process 1138 */ 1139 mm = m_copy(mb0, 0, sizeof(struct ip6_hdr)); 1140 1141 if (mm == NULL) { 1142 free(rte, M_MRTABLE6); 1143 m_freem(mb0); 1144 free(rt, M_MRTABLE6); 1145 splx(s); 1146 return (ENOBUFS); 1147 } 1148 1149 /* 1150 * Send message to routing daemon 1151 */ 1152 sin6.sin6_addr = ip6->ip6_src; 1153 1154 im = NULL; 1155 #ifdef MRT6_OINIT 1156 oim = NULL; 1157 #endif 1158 switch (ip6_mrouter_ver) { 1159 #ifdef MRT6_OINIT 1160 case MRT6_OINIT: 1161 oim = mtod(mm, struct omrt6msg *); 1162 oim->im6_msgtype = MRT6MSG_NOCACHE; 1163 oim->im6_mbz = 0; 1164 break; 1165 #endif 1166 case MRT6_INIT: 1167 im = mtod(mm, struct mrt6msg *); 1168 im->im6_msgtype = MRT6MSG_NOCACHE; 1169 im->im6_mbz = 0; 1170 break; 1171 default: 1172 free(rte, M_MRTABLE6); 1173 m_freem(mb0); 1174 free(rt, M_MRTABLE6); 1175 splx(s); 1176 return (EINVAL); 1177 } 1178 1179 #ifdef MRT6DEBUG 1180 if (mrt6debug & DEBUG_FORWARD) 1181 log(LOG_DEBUG, 1182 "getting the iif info in the kernel\n"); 1183 #endif 1184 1185 for (mifp = mif6table, mifi = 0; 1186 mifi < nummifs && mifp->m6_ifp != ifp; 1187 mifp++, mifi++) 1188 ; 1189 1190 switch (ip6_mrouter_ver) { 1191 #ifdef MRT6_OINIT 1192 case MRT6_OINIT: 1193 oim->im6_mif = mifi; 1194 break; 1195 #endif 1196 case MRT6_INIT: 1197 im->im6_mif = mifi; 1198 break; 1199 } 1200 1201 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1202 log(LOG_WARNING, "ip6_mforward: ip6_mrouter " 1203 "socket queue full\n"); 1204 mrt6stat.mrt6s_upq_sockfull++; 1205 free(rte, M_MRTABLE6); 1206 m_freem(mb0); 1207 free(rt, M_MRTABLE6); 1208 splx(s); 1209 return (ENOBUFS); 1210 } 1211 1212 mrt6stat.mrt6s_upcalls++; 1213 1214 /* insert new entry at head of hash chain */ 1215 bzero(rt, sizeof(*rt)); 1216 rt->mf6c_origin.sin6_family = AF_INET6; 1217 rt->mf6c_origin.sin6_len = sizeof(struct sockaddr_in6); 1218 rt->mf6c_origin.sin6_addr = ip6->ip6_src; 1219 rt->mf6c_mcastgrp.sin6_family = AF_INET6; 1220 rt->mf6c_mcastgrp.sin6_len = sizeof(struct sockaddr_in6); 1221 rt->mf6c_mcastgrp.sin6_addr = ip6->ip6_dst; 1222 rt->mf6c_expire = UPCALL_EXPIRE; 1223 n6expire[hash]++; 1224 rt->mf6c_parent = MF6C_INCOMPLETE_PARENT; 1225 1226 /* link into table */ 1227 rt->mf6c_next = mf6ctable[hash]; 1228 mf6ctable[hash] = rt; 1229 /* Add this entry to the end of the queue */ 1230 rt->mf6c_stall = rte; 1231 } else { 1232 /* determine if q has overflowed */ 1233 struct rtdetq **p; 1234 int npkts = 0; 1235 1236 for (p = &rt->mf6c_stall; *p != NULL; p = &(*p)->next) 1237 if (++npkts > MAX_UPQ6) { 1238 mrt6stat.mrt6s_upq_ovflw++; 1239 free(rte, M_MRTABLE6); 1240 m_freem(mb0); 1241 splx(s); 1242 return (0); 1243 } 1244 1245 /* Add this entry to the end of the queue */ 1246 *p = rte; 1247 } 1248 1249 rte->next = NULL; 1250 rte->m = mb0; 1251 rte->ifp = ifp; 1252 #ifdef UPCALL_TIMING 1253 rte->t = tp; 1254 #endif /* UPCALL_TIMING */ 1255 1256 splx(s); 1257 1258 return (0); 1259 } 1260 } 1261 1262 /* 1263 * Clean up cache entries if upcalls are not serviced 1264 * Call from the Slow Timeout mechanism, every half second. 1265 */ 1266 static void 1267 expire_upcalls(void *unused) 1268 { 1269 struct rtdetq *rte; 1270 struct mf6c *mfc, **nptr; 1271 int i; 1272 int s; 1273 1274 s = splnet(); 1275 for (i = 0; i < MF6CTBLSIZ; i++) { 1276 if (n6expire[i] == 0) 1277 continue; 1278 nptr = &mf6ctable[i]; 1279 while ((mfc = *nptr) != NULL) { 1280 rte = mfc->mf6c_stall; 1281 /* 1282 * Skip real cache entries 1283 * Make sure it wasn't marked to not expire (shouldn't happen) 1284 * If it expires now 1285 */ 1286 if (rte != NULL && 1287 mfc->mf6c_expire != 0 && 1288 --mfc->mf6c_expire == 0) { 1289 #ifdef MRT6DEBUG 1290 if (mrt6debug & DEBUG_EXPIRE) { 1291 char ip6bufo[INET6_ADDRSTRLEN]; 1292 char ip6bufg[INET6_ADDRSTRLEN]; 1293 log(LOG_DEBUG, "expire_upcalls: expiring (%s %s)\n", 1294 ip6_sprintf(ip6bufo, &mfc->mf6c_origin.sin6_addr), 1295 ip6_sprintf(ip6bufg, &mfc->mf6c_mcastgrp.sin6_addr)); 1296 } 1297 #endif 1298 /* 1299 * drop all the packets 1300 * free the mbuf with the pkt, if, timing info 1301 */ 1302 do { 1303 struct rtdetq *n = rte->next; 1304 m_freem(rte->m); 1305 free(rte, M_MRTABLE6); 1306 rte = n; 1307 } while (rte != NULL); 1308 mrt6stat.mrt6s_cache_cleanups++; 1309 n6expire[i]--; 1310 1311 *nptr = mfc->mf6c_next; 1312 free(mfc, M_MRTABLE6); 1313 } else { 1314 nptr = &mfc->mf6c_next; 1315 } 1316 } 1317 } 1318 splx(s); 1319 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 1320 expire_upcalls, NULL); 1321 } 1322 1323 /* 1324 * Packet forwarding routine once entry in the cache is made 1325 */ 1326 static int 1327 ip6_mdq(struct mbuf *m, struct ifnet *ifp, struct mf6c *rt) 1328 { 1329 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 1330 mifi_t mifi, iif; 1331 struct mif6 *mifp; 1332 int plen = m->m_pkthdr.len; 1333 struct in6_addr src0, dst0; /* copies for local work */ 1334 u_int32_t iszone, idzone, oszone, odzone; 1335 int error = 0; 1336 1337 /* 1338 * Macro to send packet on mif. Since RSVP packets don't get counted on 1339 * input, they shouldn't get counted on output, so statistics keeping is 1340 * separate. 1341 */ 1342 1343 #define MC6_SEND(ip6, mifp, m) do { \ 1344 if ((mifp)->m6_flags & MIFF_REGISTER) \ 1345 register_send((ip6), (mifp), (m)); \ 1346 else \ 1347 phyint_send((ip6), (mifp), (m)); \ 1348 } while (/*CONSTCOND*/ 0) 1349 1350 /* 1351 * Don't forward if it didn't arrive from the parent mif 1352 * for its origin. 1353 */ 1354 mifi = rt->mf6c_parent; 1355 if ((mifi >= nummifs) || (mif6table[mifi].m6_ifp != ifp)) { 1356 /* came in the wrong interface */ 1357 #ifdef MRT6DEBUG 1358 if (mrt6debug & DEBUG_FORWARD) 1359 log(LOG_DEBUG, 1360 "wrong if: ifid %d mifi %d mififid %x\n", 1361 ifp->if_index, mifi, 1362 mif6table[mifi].m6_ifp->if_index); 1363 #endif 1364 mrt6stat.mrt6s_wrong_if++; 1365 rt->mf6c_wrong_if++; 1366 /* 1367 * If we are doing PIM processing, and we are forwarding 1368 * packets on this interface, send a message to the 1369 * routing daemon. 1370 */ 1371 /* have to make sure this is a valid mif */ 1372 if (mifi < nummifs && mif6table[mifi].m6_ifp) 1373 if (pim6 && (m->m_flags & M_LOOP) == 0) { 1374 /* 1375 * Check the M_LOOP flag to avoid an 1376 * unnecessary PIM assert. 1377 * XXX: M_LOOP is an ad-hoc hack... 1378 */ 1379 static struct sockaddr_in6 sin6 = 1380 { sizeof(sin6), AF_INET6 }; 1381 1382 struct mbuf *mm; 1383 struct mrt6msg *im; 1384 #ifdef MRT6_OINIT 1385 struct omrt6msg *oim; 1386 #endif 1387 1388 mm = m_copy(m, 0, sizeof(struct ip6_hdr)); 1389 if (mm && 1390 (M_HASCL(mm) || 1391 mm->m_len < sizeof(struct ip6_hdr))) 1392 mm = m_pullup(mm, sizeof(struct ip6_hdr)); 1393 if (mm == NULL) 1394 return (ENOBUFS); 1395 1396 #ifdef MRT6_OINIT 1397 oim = NULL; 1398 #endif 1399 im = NULL; 1400 switch (ip6_mrouter_ver) { 1401 #ifdef MRT6_OINIT 1402 case MRT6_OINIT: 1403 oim = mtod(mm, struct omrt6msg *); 1404 oim->im6_msgtype = MRT6MSG_WRONGMIF; 1405 oim->im6_mbz = 0; 1406 break; 1407 #endif 1408 case MRT6_INIT: 1409 im = mtod(mm, struct mrt6msg *); 1410 im->im6_msgtype = MRT6MSG_WRONGMIF; 1411 im->im6_mbz = 0; 1412 break; 1413 default: 1414 m_freem(mm); 1415 return (EINVAL); 1416 } 1417 1418 for (mifp = mif6table, iif = 0; 1419 iif < nummifs && mifp && 1420 mifp->m6_ifp != ifp; 1421 mifp++, iif++) 1422 ; 1423 1424 switch (ip6_mrouter_ver) { 1425 #ifdef MRT6_OINIT 1426 case MRT6_OINIT: 1427 oim->im6_mif = iif; 1428 sin6.sin6_addr = oim->im6_src; 1429 break; 1430 #endif 1431 case MRT6_INIT: 1432 im->im6_mif = iif; 1433 sin6.sin6_addr = im->im6_src; 1434 break; 1435 } 1436 1437 mrt6stat.mrt6s_upcalls++; 1438 1439 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1440 #ifdef MRT6DEBUG 1441 if (mrt6debug) 1442 log(LOG_WARNING, "mdq, ip6_mrouter socket queue full\n"); 1443 #endif 1444 ++mrt6stat.mrt6s_upq_sockfull; 1445 return (ENOBUFS); 1446 } /* if socket Q full */ 1447 } /* if PIM */ 1448 return (0); 1449 } /* if wrong iif */ 1450 1451 /* If I sourced this packet, it counts as output, else it was input. */ 1452 if (m->m_pkthdr.rcvif == NULL) { 1453 /* XXX: is rcvif really NULL when output?? */ 1454 mif6table[mifi].m6_pkt_out++; 1455 mif6table[mifi].m6_bytes_out += plen; 1456 } else { 1457 mif6table[mifi].m6_pkt_in++; 1458 mif6table[mifi].m6_bytes_in += plen; 1459 } 1460 rt->mf6c_pkt_cnt++; 1461 rt->mf6c_byte_cnt += plen; 1462 1463 /* 1464 * For each mif, forward a copy of the packet if there are group 1465 * members downstream on the interface. 1466 */ 1467 src0 = ip6->ip6_src; 1468 dst0 = ip6->ip6_dst; 1469 if ((error = in6_setscope(&src0, ifp, &iszone)) != 0 || 1470 (error = in6_setscope(&dst0, ifp, &idzone)) != 0) { 1471 ip6stat.ip6s_badscope++; 1472 return (error); 1473 } 1474 for (mifp = mif6table, mifi = 0; mifi < nummifs; mifp++, mifi++) { 1475 if (IF_ISSET(mifi, &rt->mf6c_ifset)) { 1476 /* 1477 * check if the outgoing packet is going to break 1478 * a scope boundary. 1479 * XXX For packets through PIM register tunnel 1480 * interface, we believe a routing daemon. 1481 */ 1482 if (!(mif6table[rt->mf6c_parent].m6_flags & 1483 MIFF_REGISTER) && 1484 !(mif6table[mifi].m6_flags & MIFF_REGISTER)) { 1485 if (in6_setscope(&src0, mif6table[mifi].m6_ifp, 1486 &oszone) || 1487 in6_setscope(&dst0, mif6table[mifi].m6_ifp, 1488 &odzone) || 1489 iszone != oszone || 1490 idzone != odzone) { 1491 ip6stat.ip6s_badscope++; 1492 continue; 1493 } 1494 } 1495 1496 mifp->m6_pkt_out++; 1497 mifp->m6_bytes_out += plen; 1498 MC6_SEND(ip6, mifp, m); 1499 } 1500 } 1501 return (0); 1502 } 1503 1504 static void 1505 phyint_send(struct ip6_hdr *ip6, struct mif6 *mifp, struct mbuf *m) 1506 { 1507 struct mbuf *mb_copy; 1508 struct ifnet *ifp = mifp->m6_ifp; 1509 int error = 0; 1510 int s = splnet(); /* needs to protect static "ro" below. */ 1511 static struct route_in6 ro; 1512 struct in6_multi *in6m; 1513 struct sockaddr_in6 *dst6; 1514 u_long linkmtu; 1515 1516 /* 1517 * Make a new reference to the packet; make sure that 1518 * the IPv6 header is actually copied, not just referenced, 1519 * so that ip6_output() only scribbles on the copy. 1520 */ 1521 mb_copy = m_copy(m, 0, M_COPYALL); 1522 if (mb_copy && 1523 (M_HASCL(mb_copy) || mb_copy->m_len < sizeof(struct ip6_hdr))) 1524 mb_copy = m_pullup(mb_copy, sizeof(struct ip6_hdr)); 1525 if (mb_copy == NULL) { 1526 splx(s); 1527 return; 1528 } 1529 /* set MCAST flag to the outgoing packet */ 1530 mb_copy->m_flags |= M_MCAST; 1531 1532 /* 1533 * If we sourced the packet, call ip6_output since we may devide 1534 * the packet into fragments when the packet is too big for the 1535 * outgoing interface. 1536 * Otherwise, we can simply send the packet to the interface 1537 * sending queue. 1538 */ 1539 if (m->m_pkthdr.rcvif == NULL) { 1540 struct ip6_moptions im6o; 1541 1542 im6o.im6o_multicast_ifp = ifp; 1543 /* XXX: ip6_output will override ip6->ip6_hlim */ 1544 im6o.im6o_multicast_hlim = ip6->ip6_hlim; 1545 im6o.im6o_multicast_loop = 1; 1546 error = ip6_output(mb_copy, NULL, &ro, 1547 IPV6_FORWARDING, &im6o, NULL, NULL); 1548 1549 #ifdef MRT6DEBUG 1550 if (mrt6debug & DEBUG_XMIT) 1551 log(LOG_DEBUG, "phyint_send on mif %d err %d\n", 1552 mifp - mif6table, error); 1553 #endif 1554 splx(s); 1555 return; 1556 } 1557 1558 /* 1559 * If we belong to the destination multicast group 1560 * on the outgoing interface, loop back a copy. 1561 */ 1562 dst6 = (struct sockaddr_in6 *)&ro.ro_dst; 1563 IN6_LOOKUP_MULTI(ip6->ip6_dst, ifp, in6m); 1564 if (in6m != NULL) { 1565 dst6->sin6_len = sizeof(struct sockaddr_in6); 1566 dst6->sin6_family = AF_INET6; 1567 dst6->sin6_addr = ip6->ip6_dst; 1568 ip6_mloopback(ifp, m, (struct sockaddr_in6 *)&ro.ro_dst); 1569 } 1570 /* 1571 * Put the packet into the sending queue of the outgoing interface 1572 * if it would fit in the MTU of the interface. 1573 */ 1574 linkmtu = IN6_LINKMTU(ifp); 1575 if (mb_copy->m_pkthdr.len <= linkmtu || linkmtu < IPV6_MMTU) { 1576 dst6->sin6_len = sizeof(struct sockaddr_in6); 1577 dst6->sin6_family = AF_INET6; 1578 dst6->sin6_addr = ip6->ip6_dst; 1579 /* 1580 * We just call if_output instead of nd6_output here, since 1581 * we need no ND for a multicast forwarded packet...right? 1582 */ 1583 error = (*ifp->if_output)(ifp, mb_copy, 1584 (struct sockaddr *)&ro.ro_dst, NULL); 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 } else { 1591 /* 1592 * pMTU discovery is intentionally disabled by default, since 1593 * various router may notify pMTU in multicast, which can be 1594 * a DDoS to a router 1595 */ 1596 if (ip6_mcast_pmtu) 1597 icmp6_error(mb_copy, ICMP6_PACKET_TOO_BIG, 0, linkmtu); 1598 else { 1599 #ifdef MRT6DEBUG 1600 if (mrt6debug & DEBUG_XMIT) { 1601 char ip6bufs[INET6_ADDRSTRLEN]; 1602 char ip6bufd[INET6_ADDRSTRLEN]; 1603 log(LOG_DEBUG, 1604 "phyint_send: packet too big on %s o %s " 1605 "g %s size %d(discarded)\n", 1606 if_name(ifp), 1607 ip6_sprintf(ip6bufs, &ip6->ip6_src), 1608 ip6_sprintf(ip6bufd, &ip6->ip6_dst), 1609 mb_copy->m_pkthdr.len); 1610 } 1611 #endif /* MRT6DEBUG */ 1612 m_freem(mb_copy); /* simply discard the packet */ 1613 } 1614 } 1615 1616 splx(s); 1617 } 1618 1619 static int 1620 register_send(struct ip6_hdr *ip6, struct mif6 *mif, struct mbuf *m) 1621 { 1622 struct mbuf *mm; 1623 int i, len = m->m_pkthdr.len; 1624 static struct sockaddr_in6 sin6 = { sizeof(sin6), AF_INET6 }; 1625 struct mrt6msg *im6; 1626 1627 #ifdef MRT6DEBUG 1628 if (mrt6debug) { 1629 char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN]; 1630 log(LOG_DEBUG, "** IPv6 register_send **\n src %s dst %s\n", 1631 ip6_sprintf(ip6bufs, &ip6->ip6_src), 1632 ip6_sprintf(ip6bufd, &ip6->ip6_dst)); 1633 } 1634 #endif 1635 ++pim6stat.pim6s_snd_registers; 1636 1637 /* Make a copy of the packet to send to the user level process */ 1638 MGETHDR(mm, M_DONTWAIT, MT_HEADER); 1639 if (mm == NULL) 1640 return (ENOBUFS); 1641 mm->m_pkthdr.rcvif = NULL; 1642 mm->m_data += max_linkhdr; 1643 mm->m_len = sizeof(struct ip6_hdr); 1644 1645 if ((mm->m_next = m_copy(m, 0, M_COPYALL)) == NULL) { 1646 m_freem(mm); 1647 return (ENOBUFS); 1648 } 1649 i = MHLEN - M_LEADINGSPACE(mm); 1650 if (i > len) 1651 i = len; 1652 mm = m_pullup(mm, i); 1653 if (mm == NULL) 1654 return (ENOBUFS); 1655 /* TODO: check it! */ 1656 mm->m_pkthdr.len = len + sizeof(struct ip6_hdr); 1657 1658 /* 1659 * Send message to routing daemon 1660 */ 1661 sin6.sin6_addr = ip6->ip6_src; 1662 1663 im6 = mtod(mm, struct mrt6msg *); 1664 im6->im6_msgtype = MRT6MSG_WHOLEPKT; 1665 im6->im6_mbz = 0; 1666 1667 im6->im6_mif = mif - mif6table; 1668 1669 /* iif info is not given for reg. encap.n */ 1670 mrt6stat.mrt6s_upcalls++; 1671 1672 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1673 #ifdef MRT6DEBUG 1674 if (mrt6debug) 1675 log(LOG_WARNING, 1676 "register_send: ip6_mrouter socket queue full\n"); 1677 #endif 1678 ++mrt6stat.mrt6s_upq_sockfull; 1679 return (ENOBUFS); 1680 } 1681 return (0); 1682 } 1683 1684 /* 1685 * PIM sparse mode hook 1686 * Receives the pim control messages, and passes them up to the listening 1687 * socket, using rip6_input. 1688 * The only message processed is the REGISTER pim message; the pim header 1689 * is stripped off, and the inner packet is passed to register_mforward. 1690 */ 1691 int 1692 pim6_input(struct mbuf **mp, int *offp, int proto) 1693 { 1694 struct pim *pim; /* pointer to a pim struct */ 1695 struct ip6_hdr *ip6; 1696 int pimlen; 1697 struct mbuf *m = *mp; 1698 int minlen; 1699 int off = *offp; 1700 1701 ++pim6stat.pim6s_rcv_total; 1702 1703 ip6 = mtod(m, struct ip6_hdr *); 1704 pimlen = m->m_pkthdr.len - *offp; 1705 1706 /* 1707 * Validate lengths 1708 */ 1709 if (pimlen < PIM_MINLEN) { 1710 ++pim6stat.pim6s_rcv_tooshort; 1711 #ifdef MRT6DEBUG 1712 if (mrt6debug & DEBUG_PIM) 1713 log(LOG_DEBUG,"pim6_input: PIM packet too short\n"); 1714 #endif 1715 m_freem(m); 1716 return (IPPROTO_DONE); 1717 } 1718 1719 /* 1720 * if the packet is at least as big as a REGISTER, go ahead 1721 * and grab the PIM REGISTER header size, to avoid another 1722 * possible m_pullup() later. 1723 * 1724 * PIM_MINLEN == pimhdr + u_int32 == 8 1725 * PIM6_REG_MINLEN == pimhdr + reghdr + eip6hdr == 4 + 4 + 40 1726 */ 1727 minlen = (pimlen >= PIM6_REG_MINLEN) ? PIM6_REG_MINLEN : PIM_MINLEN; 1728 1729 /* 1730 * Make sure that the IP6 and PIM headers in contiguous memory, and 1731 * possibly the PIM REGISTER header 1732 */ 1733 #ifndef PULLDOWN_TEST 1734 IP6_EXTHDR_CHECK(m, off, minlen, IPPROTO_DONE); 1735 /* adjust pointer */ 1736 ip6 = mtod(m, struct ip6_hdr *); 1737 1738 /* adjust mbuf to point to the PIM header */ 1739 pim = (struct pim *)((caddr_t)ip6 + off); 1740 #else 1741 IP6_EXTHDR_GET(pim, struct pim *, m, off, minlen); 1742 if (pim == NULL) { 1743 pim6stat.pim6s_rcv_tooshort++; 1744 return (IPPROTO_DONE); 1745 } 1746 #endif 1747 1748 #define PIM6_CHECKSUM 1749 #ifdef PIM6_CHECKSUM 1750 { 1751 int cksumlen; 1752 1753 /* 1754 * Validate checksum. 1755 * If PIM REGISTER, exclude the data packet 1756 */ 1757 if (pim->pim_type == PIM_REGISTER) 1758 cksumlen = PIM_MINLEN; 1759 else 1760 cksumlen = pimlen; 1761 1762 if (in6_cksum(m, IPPROTO_PIM, off, cksumlen)) { 1763 ++pim6stat.pim6s_rcv_badsum; 1764 #ifdef MRT6DEBUG 1765 if (mrt6debug & DEBUG_PIM) 1766 log(LOG_DEBUG, 1767 "pim6_input: invalid checksum\n"); 1768 #endif 1769 m_freem(m); 1770 return (IPPROTO_DONE); 1771 } 1772 } 1773 #endif /* PIM_CHECKSUM */ 1774 1775 /* PIM version check */ 1776 if (pim->pim_ver != PIM_VERSION) { 1777 ++pim6stat.pim6s_rcv_badversion; 1778 #ifdef MRT6DEBUG 1779 log(LOG_ERR, 1780 "pim6_input: incorrect version %d, expecting %d\n", 1781 pim->pim_ver, PIM_VERSION); 1782 #endif 1783 m_freem(m); 1784 return (IPPROTO_DONE); 1785 } 1786 1787 if (pim->pim_type == PIM_REGISTER) { 1788 /* 1789 * since this is a REGISTER, we'll make a copy of the register 1790 * headers ip6+pim+u_int32_t+encap_ip6, to be passed up to the 1791 * routing daemon. 1792 */ 1793 static struct sockaddr_in6 dst = { sizeof(dst), AF_INET6 }; 1794 1795 struct mbuf *mcp; 1796 struct ip6_hdr *eip6; 1797 u_int32_t *reghdr; 1798 int rc; 1799 #ifdef MRT6DEBUG 1800 char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN]; 1801 #endif 1802 1803 ++pim6stat.pim6s_rcv_registers; 1804 1805 if ((reg_mif_num >= nummifs) || (reg_mif_num == (mifi_t) -1)) { 1806 #ifdef MRT6DEBUG 1807 if (mrt6debug & DEBUG_PIM) 1808 log(LOG_DEBUG, 1809 "pim6_input: register mif not set: %d\n", 1810 reg_mif_num); 1811 #endif 1812 m_freem(m); 1813 return (IPPROTO_DONE); 1814 } 1815 1816 reghdr = (u_int32_t *)(pim + 1); 1817 1818 if ((ntohl(*reghdr) & PIM_NULL_REGISTER)) 1819 goto pim6_input_to_daemon; 1820 1821 /* 1822 * Validate length 1823 */ 1824 if (pimlen < PIM6_REG_MINLEN) { 1825 ++pim6stat.pim6s_rcv_tooshort; 1826 ++pim6stat.pim6s_rcv_badregisters; 1827 #ifdef MRT6DEBUG 1828 log(LOG_ERR, 1829 "pim6_input: register packet size too " 1830 "small %d from %s\n", 1831 pimlen, ip6_sprintf(ip6bufs, &ip6->ip6_src)); 1832 #endif 1833 m_freem(m); 1834 return (IPPROTO_DONE); 1835 } 1836 1837 eip6 = (struct ip6_hdr *) (reghdr + 1); 1838 #ifdef MRT6DEBUG 1839 if (mrt6debug & DEBUG_PIM) 1840 log(LOG_DEBUG, 1841 "pim6_input[register], eip6: %s -> %s, " 1842 "eip6 plen %d\n", 1843 ip6_sprintf(ip6bufs, &eip6->ip6_src), 1844 ip6_sprintf(ip6bufd, &eip6->ip6_dst), 1845 ntohs(eip6->ip6_plen)); 1846 #endif 1847 1848 /* verify the version number of the inner packet */ 1849 if ((eip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) { 1850 ++pim6stat.pim6s_rcv_badregisters; 1851 #ifdef MRT6DEBUG 1852 log(LOG_DEBUG, "pim6_input: invalid IP version (%d) " 1853 "of the inner packet\n", 1854 (eip6->ip6_vfc & IPV6_VERSION)); 1855 #endif 1856 m_freem(m); 1857 return (IPPROTO_NONE); 1858 } 1859 1860 /* verify the inner packet is destined to a mcast group */ 1861 if (!IN6_IS_ADDR_MULTICAST(&eip6->ip6_dst)) { 1862 ++pim6stat.pim6s_rcv_badregisters; 1863 #ifdef MRT6DEBUG 1864 if (mrt6debug & DEBUG_PIM) 1865 log(LOG_DEBUG, 1866 "pim6_input: inner packet of register " 1867 "is not multicast %s\n", 1868 ip6_sprintf(ip6bufd, &eip6->ip6_dst)); 1869 #endif 1870 m_freem(m); 1871 return (IPPROTO_DONE); 1872 } 1873 1874 /* 1875 * make a copy of the whole header to pass to the daemon later. 1876 */ 1877 mcp = m_copy(m, 0, off + PIM6_REG_MINLEN); 1878 if (mcp == NULL) { 1879 #ifdef MRT6DEBUG 1880 log(LOG_ERR, 1881 "pim6_input: pim register: " 1882 "could not copy register head\n"); 1883 #endif 1884 m_freem(m); 1885 return (IPPROTO_DONE); 1886 } 1887 1888 /* 1889 * forward the inner ip6 packet; point m_data at the inner ip6. 1890 */ 1891 m_adj(m, off + PIM_MINLEN); 1892 #ifdef MRT6DEBUG 1893 if (mrt6debug & DEBUG_PIM) { 1894 log(LOG_DEBUG, 1895 "pim6_input: forwarding decapsulated register: " 1896 "src %s, dst %s, mif %d\n", 1897 ip6_sprintf(ip6bufs, &eip6->ip6_src), 1898 ip6_sprintf(ip6bufd, &eip6->ip6_dst), 1899 reg_mif_num); 1900 } 1901 #endif 1902 1903 rc = if_simloop(mif6table[reg_mif_num].m6_ifp, m, 1904 dst.sin6_family, 0); 1905 1906 /* prepare the register head to send to the mrouting daemon */ 1907 m = mcp; 1908 } 1909 1910 /* 1911 * Pass the PIM message up to the daemon; if it is a register message 1912 * pass the 'head' only up to the daemon. This includes the 1913 * encapsulator ip6 header, pim header, register header and the 1914 * encapsulated ip6 header. 1915 */ 1916 pim6_input_to_daemon: 1917 rip6_input(&m, offp, proto); 1918 return (IPPROTO_DONE); 1919 }
Cache object: 43313555ef66eb7879340708fb284158
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