1 /* $FreeBSD$ */ 2 /* $KAME: ip6_mroute.c,v 1.58 2001/12/18 02:36:31 itojun Exp $ */ 3 4 /*- 5 * Copyright (C) 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* BSDI ip_mroute.c,v 2.10 1996/11/14 00:29:52 jch Exp */ 34 35 /*- 36 * Copyright (c) 1989 Stephen Deering 37 * Copyright (c) 1992, 1993 38 * The Regents of the University of California. All rights reserved. 39 * 40 * This code is derived from software contributed to Berkeley by 41 * Stephen Deering of Stanford University. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 4. Neither the name of the University nor the names of its contributors 52 * may be used to endorse or promote products derived from this software 53 * without specific prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 65 * SUCH DAMAGE. 66 * 67 * @(#)ip_mroute.c 8.2 (Berkeley) 11/15/93 68 */ 69 70 /* 71 * IP multicast forwarding procedures 72 * 73 * Written by David Waitzman, BBN Labs, August 1988. 74 * Modified by Steve Deering, Stanford, February 1989. 75 * Modified by Mark J. Steiglitz, Stanford, May, 1991 76 * Modified by Van Jacobson, LBL, January 1993 77 * Modified by Ajit Thyagarajan, PARC, August 1993 78 * Modified by Bill Fenner, PARC, April 1994 79 * 80 * MROUTING Revision: 3.5.1.2 + PIM-SMv2 (pimd) Support 81 */ 82 83 #include "opt_inet.h" 84 #include "opt_inet6.h" 85 86 #include <sys/param.h> 87 #include <sys/callout.h> 88 #include <sys/errno.h> 89 #include <sys/kernel.h> 90 #include <sys/lock.h> 91 #include <sys/malloc.h> 92 #include <sys/mbuf.h> 93 #include <sys/protosw.h> 94 #include <sys/signalvar.h> 95 #include <sys/socket.h> 96 #include <sys/socketvar.h> 97 #include <sys/sockio.h> 98 #include <sys/sx.h> 99 #include <sys/sysctl.h> 100 #include <sys/syslog.h> 101 #include <sys/systm.h> 102 #include <sys/time.h> 103 104 #include <net/if.h> 105 #include <net/if_types.h> 106 #include <net/raw_cb.h> 107 #include <net/route.h> 108 109 #include <netinet/in.h> 110 #include <netinet/in_var.h> 111 #include <netinet/icmp6.h> 112 113 #include <netinet/ip6.h> 114 #include <netinet6/ip6_var.h> 115 #include <netinet6/scope6_var.h> 116 #include <netinet6/nd6.h> 117 #include <netinet6/ip6_mroute.h> 118 #include <netinet6/ip6protosw.h> 119 #include <netinet6/pim6.h> 120 #include <netinet6/pim6_var.h> 121 122 static MALLOC_DEFINE(M_MRTABLE6, "mf6c", "multicast forwarding cache entry"); 123 124 /* XXX: this is a very common idiom; move to <sys/mbuf.h> ? */ 125 #define M_HASCL(m) ((m)->m_flags & M_EXT) 126 127 static int ip6_mdq __P((struct mbuf *, struct ifnet *, struct mf6c *)); 128 static void phyint_send __P((struct ip6_hdr *, struct mif6 *, struct mbuf *)); 129 130 static int set_pim6 __P((int *)); 131 static int socket_send __P((struct socket *, struct mbuf *, 132 struct sockaddr_in6 *)); 133 static int register_send __P((struct ip6_hdr *, struct mif6 *, 134 struct mbuf *)); 135 136 extern struct domain inet6domain; 137 138 /* XXX: referenced from ip_mroute.c for dynamically loading this code. */ 139 struct ip6protosw in6_pim_protosw = { 140 .pr_type = SOCK_RAW, 141 .pr_domain = &inet6domain, 142 .pr_protocol = IPPROTO_PIM, 143 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 144 .pr_input = pim6_input, 145 .pr_output = rip6_output, 146 .pr_ctloutput = rip6_ctloutput, 147 .pr_usrreqs = &rip6_usrreqs 148 }; 149 150 static int ip6_mrouter_ver = 0; 151 152 SYSCTL_DECL(_net_inet6); 153 SYSCTL_DECL(_net_inet6_ip6); 154 SYSCTL_NODE(_net_inet6, IPPROTO_PIM, pim, CTLFLAG_RW, 0, "PIM"); 155 156 static struct mrt6stat mrt6stat; 157 SYSCTL_STRUCT(_net_inet6_ip6, OID_AUTO, mrt6stat, CTLFLAG_RW, 158 &mrt6stat, mrt6stat, 159 "Multicast Routing Statistics (struct mrt6stat, netinet6/ip6_mroute.h)"); 160 161 #define NO_RTE_FOUND 0x1 162 #define RTE_FOUND 0x2 163 164 static struct mf6c *mf6ctable[MF6CTBLSIZ]; 165 SYSCTL_OPAQUE(_net_inet6_ip6, OID_AUTO, mf6ctable, CTLFLAG_RD, 166 &mf6ctable, sizeof(mf6ctable), "S,*mf6ctable[MF6CTBLSIZ]", 167 "Multicast Forwarding Table (struct *mf6ctable[MF6CTBLSIZ], " 168 "netinet6/ip6_mroute.h)"); 169 170 static u_char n6expire[MF6CTBLSIZ]; 171 172 static struct mif6 mif6table[MAXMIFS]; 173 SYSCTL_OPAQUE(_net_inet6_ip6, OID_AUTO, mif6table, CTLFLAG_RD, 174 &mif6table, sizeof(mif6table), "S,vif[MAXMIFS]", 175 "Multicast Interfaces (struct mif[MAXMIFS], netinet6/ip6_mroute.h)"); 176 177 #ifdef MRT6DEBUG 178 static u_int mrt6debug = 0; /* debug level */ 179 #define DEBUG_MFC 0x02 180 #define DEBUG_FORWARD 0x04 181 #define DEBUG_EXPIRE 0x08 182 #define DEBUG_XMIT 0x10 183 #define DEBUG_REG 0x20 184 #define DEBUG_PIM 0x40 185 #endif 186 187 static void expire_upcalls __P((void *)); 188 #define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */ 189 #define UPCALL_EXPIRE 6 /* number of timeouts */ 190 191 #ifdef INET 192 #ifdef MROUTING 193 extern struct socket *ip_mrouter; 194 #endif 195 #endif 196 197 /* 198 * 'Interfaces' associated with decapsulator (so we can tell 199 * packets that went through it from ones that get reflected 200 * by a broken gateway). Different from IPv4 register_if, 201 * these interfaces are linked into the system ifnet list, 202 * because per-interface IPv6 statistics are maintained in 203 * ifp->if_afdata. But it does not have any routes point 204 * to them. I.e., packets can't be sent this way. They 205 * only exist as a placeholder for multicast source 206 * verification. 207 */ 208 static struct ifnet *multicast_register_if6; 209 210 #define ENCAP_HOPS 64 211 212 /* 213 * Private variables. 214 */ 215 static mifi_t nummifs = 0; 216 static mifi_t reg_mif_num = (mifi_t)-1; 217 218 static struct pim6stat pim6stat; 219 SYSCTL_STRUCT(_net_inet6_pim, PIM6CTL_STATS, stats, CTLFLAG_RD, 220 &pim6stat, pim6stat, 221 "PIM Statistics (struct pim6stat, netinet6/pim_var.h)"); 222 223 static int pim6; 224 225 /* 226 * Hash function for a source, group entry 227 */ 228 #define MF6CHASH(a, g) MF6CHASHMOD((a).s6_addr32[0] ^ (a).s6_addr32[1] ^ \ 229 (a).s6_addr32[2] ^ (a).s6_addr32[3] ^ \ 230 (g).s6_addr32[0] ^ (g).s6_addr32[1] ^ \ 231 (g).s6_addr32[2] ^ (g).s6_addr32[3]) 232 233 /* 234 * Find a route for a given origin IPv6 address and Multicast group address. 235 */ 236 #define MF6CFIND(o, g, rt) do { \ 237 struct mf6c *_rt = mf6ctable[MF6CHASH(o,g)]; \ 238 rt = NULL; \ 239 mrt6stat.mrt6s_mfc_lookups++; \ 240 while (_rt) { \ 241 if (IN6_ARE_ADDR_EQUAL(&_rt->mf6c_origin.sin6_addr, &(o)) && \ 242 IN6_ARE_ADDR_EQUAL(&_rt->mf6c_mcastgrp.sin6_addr, &(g)) && \ 243 (_rt->mf6c_stall == NULL)) { \ 244 rt = _rt; \ 245 break; \ 246 } \ 247 _rt = _rt->mf6c_next; \ 248 } \ 249 if (rt == NULL) { \ 250 mrt6stat.mrt6s_mfc_misses++; \ 251 } \ 252 } while (/*CONSTCOND*/ 0) 253 254 /* 255 * Macros to compute elapsed time efficiently 256 * Borrowed from Van Jacobson's scheduling code 257 * XXX: replace with timersub() ? 258 */ 259 #define TV_DELTA(a, b, delta) do { \ 260 int xxs; \ 261 \ 262 delta = (a).tv_usec - (b).tv_usec; \ 263 if ((xxs = (a).tv_sec - (b).tv_sec)) { \ 264 switch (xxs) { \ 265 case 2: \ 266 delta += 1000000; \ 267 /* FALLTHROUGH */ \ 268 case 1: \ 269 delta += 1000000; \ 270 break; \ 271 default: \ 272 delta += (1000000 * xxs); \ 273 } \ 274 } \ 275 } while (/*CONSTCOND*/ 0) 276 277 /* XXX: replace with timercmp(a, b, <) ? */ 278 #define TV_LT(a, b) (((a).tv_usec < (b).tv_usec && \ 279 (a).tv_sec <= (b).tv_sec) || (a).tv_sec < (b).tv_sec) 280 281 #ifdef UPCALL_TIMING 282 #define UPCALL_MAX 50 283 static u_long upcall_data[UPCALL_MAX + 1]; 284 static void collate(); 285 #endif /* UPCALL_TIMING */ 286 287 static int get_sg_cnt __P((struct sioc_sg_req6 *)); 288 static int get_mif6_cnt __P((struct sioc_mif_req6 *)); 289 static int ip6_mrouter_init __P((struct socket *, int, int)); 290 static int add_m6if __P((struct mif6ctl *)); 291 static int del_m6if __P((mifi_t *)); 292 static int add_m6fc __P((struct mf6cctl *)); 293 static int del_m6fc __P((struct mf6cctl *)); 294 295 static struct callout expire_upcalls_ch; 296 297 int X_ip6_mforward(struct ip6_hdr *ip6, struct ifnet *ifp, struct mbuf *m); 298 int X_ip6_mrouter_done(void); 299 int X_ip6_mrouter_set(struct socket *so, struct sockopt *sopt); 300 int X_ip6_mrouter_get(struct socket *so, struct sockopt *sopt); 301 int X_mrt6_ioctl(int cmd, caddr_t data); 302 303 /* 304 * Handle MRT setsockopt commands to modify the multicast routing tables. 305 */ 306 int 307 X_ip6_mrouter_set(struct socket *so, struct sockopt *sopt) 308 { 309 int error = 0; 310 int optval; 311 struct mif6ctl mifc; 312 struct mf6cctl mfcc; 313 mifi_t mifi; 314 315 if (so != ip6_mrouter && sopt->sopt_name != MRT6_INIT) 316 return (EACCES); 317 318 switch (sopt->sopt_name) { 319 case MRT6_INIT: 320 #ifdef MRT6_OINIT 321 case MRT6_OINIT: 322 #endif 323 error = sooptcopyin(sopt, &optval, sizeof(optval), 324 sizeof(optval)); 325 if (error) 326 break; 327 error = ip6_mrouter_init(so, optval, sopt->sopt_name); 328 break; 329 case MRT6_DONE: 330 error = X_ip6_mrouter_done(); 331 break; 332 case MRT6_ADD_MIF: 333 error = sooptcopyin(sopt, &mifc, sizeof(mifc), sizeof(mifc)); 334 if (error) 335 break; 336 error = add_m6if(&mifc); 337 break; 338 case MRT6_ADD_MFC: 339 error = sooptcopyin(sopt, &mfcc, sizeof(mfcc), sizeof(mfcc)); 340 if (error) 341 break; 342 error = add_m6fc(&mfcc); 343 break; 344 case MRT6_DEL_MFC: 345 error = sooptcopyin(sopt, &mfcc, sizeof(mfcc), sizeof(mfcc)); 346 if (error) 347 break; 348 error = del_m6fc(&mfcc); 349 break; 350 case MRT6_DEL_MIF: 351 error = sooptcopyin(sopt, &mifi, sizeof(mifi), sizeof(mifi)); 352 if (error) 353 break; 354 error = del_m6if(&mifi); 355 break; 356 case MRT6_PIM: 357 error = sooptcopyin(sopt, &optval, sizeof(optval), 358 sizeof(optval)); 359 if (error) 360 break; 361 error = set_pim6(&optval); 362 break; 363 default: 364 error = EOPNOTSUPP; 365 break; 366 } 367 368 return (error); 369 } 370 371 /* 372 * Handle MRT getsockopt commands 373 */ 374 int 375 X_ip6_mrouter_get(struct socket *so, struct sockopt *sopt) 376 { 377 int error = 0; 378 379 if (so != ip6_mrouter) 380 return (EACCES); 381 382 switch (sopt->sopt_name) { 383 case MRT6_PIM: 384 error = sooptcopyout(sopt, &pim6, sizeof(pim6)); 385 break; 386 } 387 return (error); 388 } 389 390 /* 391 * Handle ioctl commands to obtain information from the cache 392 */ 393 int 394 X_mrt6_ioctl(int cmd, caddr_t data) 395 { 396 switch (cmd) { 397 case SIOCGETSGCNT_IN6: 398 return (get_sg_cnt((struct sioc_sg_req6 *)data)); 399 case SIOCGETMIFCNT_IN6: 400 return (get_mif6_cnt((struct sioc_mif_req6 *)data)); 401 default: 402 return (EINVAL); 403 } 404 } 405 406 /* 407 * returns the packet, byte, rpf-failure count for the source group provided 408 */ 409 static int 410 get_sg_cnt(req) 411 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(req) 437 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(i) 454 int *i; 455 { 456 if ((*i != 1) && (*i != 0)) 457 return (EINVAL); 458 459 pim6 = *i; 460 461 return (0); 462 } 463 464 /* 465 * Enable multicast routing 466 */ 467 static int 468 ip6_mrouter_init(so, v, cmd) 469 struct socket *so; 470 int v; 471 int cmd; 472 { 473 #ifdef MRT6DEBUG 474 if (mrt6debug) 475 log(LOG_DEBUG, 476 "ip6_mrouter_init: so_type = %d, pr_protocol = %d\n", 477 so->so_type, so->so_proto->pr_protocol); 478 #endif 479 480 if (so->so_type != SOCK_RAW || 481 so->so_proto->pr_protocol != IPPROTO_ICMPV6) 482 return (EOPNOTSUPP); 483 484 if (v != 1) 485 return (ENOPROTOOPT); 486 487 if (ip6_mrouter != NULL) 488 return (EADDRINUSE); 489 490 ip6_mrouter = so; 491 ip6_mrouter_ver = cmd; 492 493 bzero((caddr_t)mf6ctable, sizeof(mf6ctable)); 494 bzero((caddr_t)n6expire, sizeof(n6expire)); 495 496 pim6 = 0;/* used for stubbing out/in pim stuff */ 497 498 callout_init(&expire_upcalls_ch, 0); 499 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 500 expire_upcalls, NULL); 501 502 #ifdef MRT6DEBUG 503 if (mrt6debug) 504 log(LOG_DEBUG, "ip6_mrouter_init\n"); 505 #endif 506 507 return (0); 508 } 509 510 /* 511 * Disable multicast routing 512 */ 513 int 514 X_ip6_mrouter_done(void) 515 { 516 mifi_t mifi; 517 int i; 518 struct mf6c *rt; 519 struct rtdetq *rte; 520 int s; 521 522 s = splnet(); 523 524 /* 525 * For each phyint in use, disable promiscuous reception of all IPv6 526 * multicasts. 527 */ 528 #ifdef INET 529 #ifdef MROUTING 530 /* 531 * If there is still IPv4 multicast routing daemon, 532 * we remain interfaces to receive all muliticasted packets. 533 * XXX: there may be an interface in which the IPv4 multicast 534 * daemon is not interested... 535 */ 536 if (!ip_mrouter) 537 #endif 538 #endif 539 { 540 for (mifi = 0; mifi < nummifs; mifi++) { 541 if (mif6table[mifi].m6_ifp && 542 !(mif6table[mifi].m6_flags & MIFF_REGISTER)) { 543 if_allmulti(mif6table[mifi].m6_ifp, 0); 544 } 545 } 546 } 547 bzero((caddr_t)mif6table, sizeof(mif6table)); 548 nummifs = 0; 549 550 pim6 = 0; /* used to stub out/in pim specific code */ 551 552 callout_stop(&expire_upcalls_ch); 553 554 /* 555 * Free all multicast forwarding cache entries. 556 */ 557 for (i = 0; i < MF6CTBLSIZ; i++) { 558 rt = mf6ctable[i]; 559 while (rt) { 560 struct mf6c *frt; 561 562 for (rte = rt->mf6c_stall; rte != NULL; ) { 563 struct rtdetq *n = rte->next; 564 565 m_free(rte->m); 566 free(rte, M_MRTABLE6); 567 rte = n; 568 } 569 frt = rt; 570 rt = rt->mf6c_next; 571 free(frt, M_MRTABLE6); 572 } 573 } 574 575 bzero((caddr_t)mf6ctable, sizeof(mf6ctable)); 576 577 /* 578 * Reset register interface 579 */ 580 if (reg_mif_num != (mifi_t)-1 && multicast_register_if6 != NULL) { 581 if_detach(multicast_register_if6); 582 if_free(multicast_register_if6); 583 reg_mif_num = (mifi_t)-1; 584 multicast_register_if6 = NULL; 585 } 586 587 ip6_mrouter = NULL; 588 ip6_mrouter_ver = 0; 589 590 splx(s); 591 592 #ifdef MRT6DEBUG 593 if (mrt6debug) 594 log(LOG_DEBUG, "ip6_mrouter_done\n"); 595 #endif 596 597 return (0); 598 } 599 600 static struct sockaddr_in6 sin6 = { sizeof(sin6), AF_INET6 }; 601 602 /* 603 * Add a mif to the mif table 604 */ 605 static int 606 add_m6if(mifcp) 607 struct mif6ctl *mifcp; 608 { 609 struct mif6 *mifp; 610 struct ifnet *ifp; 611 int error, s; 612 613 if (mifcp->mif6c_mifi >= MAXMIFS) 614 return (EINVAL); 615 mifp = mif6table + mifcp->mif6c_mifi; 616 if (mifp->m6_ifp) 617 return (EADDRINUSE); /* XXX: is it appropriate? */ 618 if (mifcp->mif6c_pifi == 0 || mifcp->mif6c_pifi > if_index) 619 return (ENXIO); 620 ifp = ifnet_byindex(mifcp->mif6c_pifi); 621 622 if (mifcp->mif6c_flags & MIFF_REGISTER) { 623 if (reg_mif_num == (mifi_t)-1) { 624 ifp = if_alloc(IFT_OTHER); 625 626 if_initname(ifp, "register_mif", 0); 627 ifp->if_flags |= IFF_LOOPBACK; 628 if_attach(ifp); 629 multicast_register_if6 = ifp; 630 reg_mif_num = mifcp->mif6c_mifi; 631 /* 632 * it is impossible to guess the ifindex of the 633 * register interface. So mif6c_pifi is automatically 634 * calculated. 635 */ 636 mifcp->mif6c_pifi = ifp->if_index; 637 } else { 638 ifp = multicast_register_if6; 639 } 640 641 } /* if REGISTER */ 642 else { 643 /* Make sure the interface supports multicast */ 644 if ((ifp->if_flags & IFF_MULTICAST) == 0) 645 return (EOPNOTSUPP); 646 647 s = splnet(); 648 error = if_allmulti(ifp, 1); 649 splx(s); 650 if (error) 651 return (error); 652 } 653 654 s = splnet(); 655 mifp->m6_flags = mifcp->mif6c_flags; 656 mifp->m6_ifp = ifp; 657 658 /* initialize per mif pkt counters */ 659 mifp->m6_pkt_in = 0; 660 mifp->m6_pkt_out = 0; 661 mifp->m6_bytes_in = 0; 662 mifp->m6_bytes_out = 0; 663 splx(s); 664 665 /* Adjust nummifs up if the mifi is higher than nummifs */ 666 if (nummifs <= mifcp->mif6c_mifi) 667 nummifs = mifcp->mif6c_mifi + 1; 668 669 #ifdef MRT6DEBUG 670 if (mrt6debug) 671 log(LOG_DEBUG, 672 "add_mif #%d, phyint %s\n", 673 mifcp->mif6c_mifi, 674 ifp->if_xname); 675 #endif 676 677 return (0); 678 } 679 680 /* 681 * Delete a mif from the mif table 682 */ 683 static int 684 del_m6if(mifip) 685 mifi_t *mifip; 686 { 687 struct mif6 *mifp = mif6table + *mifip; 688 mifi_t mifi; 689 struct ifnet *ifp; 690 int s; 691 692 if (*mifip >= nummifs) 693 return (EINVAL); 694 if (mifp->m6_ifp == NULL) 695 return (EINVAL); 696 697 s = splnet(); 698 699 if (!(mifp->m6_flags & MIFF_REGISTER)) { 700 /* 701 * XXX: what if there is yet IPv4 multicast daemon 702 * using the interface? 703 */ 704 ifp = mifp->m6_ifp; 705 706 if_allmulti(ifp, 0); 707 } else { 708 if (reg_mif_num != (mifi_t)-1 && 709 multicast_register_if6 != NULL) { 710 if_detach(multicast_register_if6); 711 if_free(multicast_register_if6); 712 reg_mif_num = (mifi_t)-1; 713 multicast_register_if6 = NULL; 714 } 715 } 716 717 bzero((caddr_t)mifp, sizeof(*mifp)); 718 719 /* Adjust nummifs down */ 720 for (mifi = nummifs; mifi > 0; mifi--) 721 if (mif6table[mifi - 1].m6_ifp) 722 break; 723 nummifs = mifi; 724 725 splx(s); 726 727 #ifdef MRT6DEBUG 728 if (mrt6debug) 729 log(LOG_DEBUG, "del_m6if %d, nummifs %d\n", *mifip, nummifs); 730 #endif 731 732 return (0); 733 } 734 735 /* 736 * Add an mfc entry 737 */ 738 static int 739 add_m6fc(mfccp) 740 struct mf6cctl *mfccp; 741 { 742 struct mf6c *rt; 743 u_long hash; 744 struct rtdetq *rte; 745 u_short nstl; 746 int s; 747 char ip6bufo[INET6_ADDRSTRLEN], ip6bufg[INET6_ADDRSTRLEN]; 748 749 MF6CFIND(mfccp->mf6cc_origin.sin6_addr, 750 mfccp->mf6cc_mcastgrp.sin6_addr, rt); 751 752 /* If an entry already exists, just update the fields */ 753 if (rt) { 754 #ifdef MRT6DEBUG 755 if (mrt6debug & DEBUG_MFC) { 756 log(LOG_DEBUG, 757 "add_m6fc no upcall h %d o %s g %s p %x\n", 758 ip6_sprintf(ip6bufo, &mfccp->mf6cc_origin.sin6_addr), 759 ip6_sprintf(ip6bufg, &mfccp->mf6cc_mcastgrp.sin6_addr), 760 mfccp->mf6cc_parent); 761 } 762 #endif 763 764 s = splnet(); 765 rt->mf6c_parent = mfccp->mf6cc_parent; 766 rt->mf6c_ifset = mfccp->mf6cc_ifset; 767 splx(s); 768 return (0); 769 } 770 771 /* 772 * Find the entry for which the upcall was made and update 773 */ 774 s = splnet(); 775 hash = MF6CHASH(mfccp->mf6cc_origin.sin6_addr, 776 mfccp->mf6cc_mcastgrp.sin6_addr); 777 for (rt = mf6ctable[hash], nstl = 0; rt; rt = rt->mf6c_next) { 778 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 779 &mfccp->mf6cc_origin.sin6_addr) && 780 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 781 &mfccp->mf6cc_mcastgrp.sin6_addr) && 782 (rt->mf6c_stall != NULL)) { 783 784 if (nstl++) 785 log(LOG_ERR, 786 "add_m6fc: %s o %s g %s p %x dbx %p\n", 787 "multiple kernel entries", 788 ip6_sprintf(ip6bufo, 789 &mfccp->mf6cc_origin.sin6_addr), 790 ip6_sprintf(ip6bufg, 791 &mfccp->mf6cc_mcastgrp.sin6_addr), 792 mfccp->mf6cc_parent, rt->mf6c_stall); 793 794 #ifdef MRT6DEBUG 795 if (mrt6debug & DEBUG_MFC) 796 log(LOG_DEBUG, 797 "add_m6fc o %s g %s p %x dbg %x\n", 798 ip6_sprintf(ip6bufo, 799 &mfccp->mf6cc_origin.sin6_addr), 800 ip6_sprintf(ip6bufg, 801 &mfccp->mf6cc_mcastgrp.sin6_addr), 802 mfccp->mf6cc_parent, rt->mf6c_stall); 803 #endif 804 805 rt->mf6c_origin = mfccp->mf6cc_origin; 806 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 807 rt->mf6c_parent = mfccp->mf6cc_parent; 808 rt->mf6c_ifset = mfccp->mf6cc_ifset; 809 /* initialize pkt counters per src-grp */ 810 rt->mf6c_pkt_cnt = 0; 811 rt->mf6c_byte_cnt = 0; 812 rt->mf6c_wrong_if = 0; 813 814 rt->mf6c_expire = 0; /* Don't clean this guy up */ 815 n6expire[hash]--; 816 817 /* free packets Qed at the end of this entry */ 818 for (rte = rt->mf6c_stall; rte != NULL; ) { 819 struct rtdetq *n = rte->next; 820 ip6_mdq(rte->m, rte->ifp, rt); 821 m_freem(rte->m); 822 #ifdef UPCALL_TIMING 823 collate(&(rte->t)); 824 #endif /* UPCALL_TIMING */ 825 free(rte, M_MRTABLE6); 826 rte = n; 827 } 828 rt->mf6c_stall = NULL; 829 } 830 } 831 832 /* 833 * It is possible that an entry is being inserted without an upcall 834 */ 835 if (nstl == 0) { 836 #ifdef MRT6DEBUG 837 if (mrt6debug & DEBUG_MFC) 838 log(LOG_DEBUG, 839 "add_mfc no upcall h %d o %s g %s p %x\n", 840 hash, 841 ip6_sprintf(ip6bufo, &mfccp->mf6cc_origin.sin6_addr), 842 ip6_sprintf(ip6bufg, &mfccp->mf6cc_mcastgrp.sin6_addr), 843 mfccp->mf6cc_parent); 844 #endif 845 846 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 847 848 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 849 &mfccp->mf6cc_origin.sin6_addr)&& 850 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 851 &mfccp->mf6cc_mcastgrp.sin6_addr)) { 852 853 rt->mf6c_origin = mfccp->mf6cc_origin; 854 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 855 rt->mf6c_parent = mfccp->mf6cc_parent; 856 rt->mf6c_ifset = mfccp->mf6cc_ifset; 857 /* initialize pkt counters per src-grp */ 858 rt->mf6c_pkt_cnt = 0; 859 rt->mf6c_byte_cnt = 0; 860 rt->mf6c_wrong_if = 0; 861 862 if (rt->mf6c_expire) 863 n6expire[hash]--; 864 rt->mf6c_expire = 0; 865 } 866 } 867 if (rt == NULL) { 868 /* no upcall, so make a new entry */ 869 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE6, 870 M_NOWAIT); 871 if (rt == NULL) { 872 splx(s); 873 return (ENOBUFS); 874 } 875 876 /* insert new entry at head of hash chain */ 877 rt->mf6c_origin = mfccp->mf6cc_origin; 878 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 879 rt->mf6c_parent = mfccp->mf6cc_parent; 880 rt->mf6c_ifset = mfccp->mf6cc_ifset; 881 /* initialize pkt counters per src-grp */ 882 rt->mf6c_pkt_cnt = 0; 883 rt->mf6c_byte_cnt = 0; 884 rt->mf6c_wrong_if = 0; 885 rt->mf6c_expire = 0; 886 rt->mf6c_stall = NULL; 887 888 /* link into table */ 889 rt->mf6c_next = mf6ctable[hash]; 890 mf6ctable[hash] = rt; 891 } 892 } 893 splx(s); 894 return (0); 895 } 896 897 #ifdef UPCALL_TIMING 898 /* 899 * collect delay statistics on the upcalls 900 */ 901 static void 902 collate(t) 903 struct timeval *t; 904 { 905 u_long d; 906 struct timeval tp; 907 u_long delta; 908 909 GET_TIME(tp); 910 911 if (TV_LT(*t, tp)) 912 { 913 TV_DELTA(tp, *t, delta); 914 915 d = delta >> 10; 916 if (d > UPCALL_MAX) 917 d = UPCALL_MAX; 918 919 ++upcall_data[d]; 920 } 921 } 922 #endif /* UPCALL_TIMING */ 923 924 /* 925 * Delete an mfc entry 926 */ 927 static int 928 del_m6fc(mfccp) 929 struct mf6cctl *mfccp; 930 { 931 struct sockaddr_in6 origin; 932 struct sockaddr_in6 mcastgrp; 933 struct mf6c *rt; 934 struct mf6c **nptr; 935 u_long hash; 936 int s; 937 938 origin = mfccp->mf6cc_origin; 939 mcastgrp = mfccp->mf6cc_mcastgrp; 940 hash = MF6CHASH(origin.sin6_addr, mcastgrp.sin6_addr); 941 942 #ifdef MRT6DEBUG 943 if (mrt6debug & DEBUG_MFC) { 944 char ip6bufo[INET6_ADDRSTRLEN], ip6bufg[INET6_ADDRSTRLEN]; 945 log(LOG_DEBUG,"del_m6fc orig %s mcastgrp %s\n", 946 ip6_sprintf(ip6bufo, &origin.sin6_addr), 947 ip6_sprintf(ip6bufg, &mcastgrp.sin6_addr)); 948 } 949 #endif 950 951 s = splnet(); 952 953 nptr = &mf6ctable[hash]; 954 while ((rt = *nptr) != NULL) { 955 if (IN6_ARE_ADDR_EQUAL(&origin.sin6_addr, 956 &rt->mf6c_origin.sin6_addr) && 957 IN6_ARE_ADDR_EQUAL(&mcastgrp.sin6_addr, 958 &rt->mf6c_mcastgrp.sin6_addr) && 959 rt->mf6c_stall == NULL) 960 break; 961 962 nptr = &rt->mf6c_next; 963 } 964 if (rt == NULL) { 965 splx(s); 966 return (EADDRNOTAVAIL); 967 } 968 969 *nptr = rt->mf6c_next; 970 free(rt, M_MRTABLE6); 971 972 splx(s); 973 974 return (0); 975 } 976 977 static int 978 socket_send(s, mm, src) 979 struct socket *s; 980 struct mbuf *mm; 981 struct sockaddr_in6 *src; 982 { 983 if (s) { 984 if (sbappendaddr(&s->so_rcv, 985 (struct sockaddr *)src, 986 mm, (struct mbuf *)0) != 0) { 987 sorwakeup(s); 988 return (0); 989 } 990 } 991 m_freem(mm); 992 return (-1); 993 } 994 995 /* 996 * IPv6 multicast forwarding function. This function assumes that the packet 997 * pointed to by "ip6" has arrived on (or is about to be sent to) the interface 998 * pointed to by "ifp", and the packet is to be relayed to other networks 999 * that have members of the packet's destination IPv6 multicast group. 1000 * 1001 * The packet is returned unscathed to the caller, unless it is 1002 * erroneous, in which case a non-zero return value tells the caller to 1003 * discard it. 1004 * 1005 * NOTE: this implementation assumes that m->m_pkthdr.rcvif is NULL iff 1006 * this function is called in the originating context (i.e., not when 1007 * forwarding a packet from other node). ip6_output(), which is currently the 1008 * only function that calls this function is called in the originating context, 1009 * explicitly ensures this condition. It is caller's responsibility to ensure 1010 * that if this function is called from somewhere else in the originating 1011 * context in the future. 1012 */ 1013 1014 int 1015 X_ip6_mforward(struct ip6_hdr *ip6, struct ifnet *ifp, struct mbuf *m) 1016 { 1017 struct mf6c *rt; 1018 struct mif6 *mifp; 1019 struct mbuf *mm; 1020 int s; 1021 mifi_t mifi; 1022 char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN]; 1023 1024 #ifdef MRT6DEBUG 1025 if (mrt6debug & DEBUG_FORWARD) 1026 log(LOG_DEBUG, "ip6_mforward: src %s, dst %s, ifindex %d\n", 1027 ip6_sprintf(ip6bufs, &ip6->ip6_src), 1028 ip6_sprintf(ip6bufd, &ip6->ip6_dst), 1029 ifp->if_index); 1030 #endif 1031 1032 /* 1033 * Don't forward a packet with Hop limit of zero or one, 1034 * or a packet destined to a local-only group. 1035 */ 1036 if (ip6->ip6_hlim <= 1 || IN6_IS_ADDR_MC_INTFACELOCAL(&ip6->ip6_dst) || 1037 IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst)) 1038 return (0); 1039 ip6->ip6_hlim--; 1040 1041 /* 1042 * Source address check: do not forward packets with unspecified 1043 * source. It was discussed in July 2000, on ipngwg mailing list. 1044 * This is rather more serious than unicast cases, because some 1045 * MLD packets can be sent with the unspecified source address 1046 * (although such packets must normally set 1 to the hop limit field). 1047 */ 1048 if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) { 1049 ip6stat.ip6s_cantforward++; 1050 if (ip6_log_time + ip6_log_interval < time_second) { 1051 ip6_log_time = time_second; 1052 log(LOG_DEBUG, 1053 "cannot forward " 1054 "from %s to %s nxt %d received on %s\n", 1055 ip6_sprintf(ip6bufs, &ip6->ip6_src), 1056 ip6_sprintf(ip6bufd, &ip6->ip6_dst), 1057 ip6->ip6_nxt, 1058 if_name(m->m_pkthdr.rcvif)); 1059 } 1060 return (0); 1061 } 1062 1063 /* 1064 * Determine forwarding mifs from the forwarding cache table 1065 */ 1066 s = splnet(); 1067 MF6CFIND(ip6->ip6_src, ip6->ip6_dst, rt); 1068 1069 /* Entry exists, so forward if necessary */ 1070 if (rt) { 1071 splx(s); 1072 return (ip6_mdq(m, ifp, rt)); 1073 } else { 1074 /* 1075 * If we don't have a route for packet's origin, 1076 * Make a copy of the packet & 1077 * send message to routing daemon 1078 */ 1079 1080 struct mbuf *mb0; 1081 struct rtdetq *rte; 1082 u_long hash; 1083 /* int i, npkts;*/ 1084 #ifdef UPCALL_TIMING 1085 struct timeval tp; 1086 1087 GET_TIME(tp); 1088 #endif /* UPCALL_TIMING */ 1089 1090 mrt6stat.mrt6s_no_route++; 1091 #ifdef MRT6DEBUG 1092 if (mrt6debug & (DEBUG_FORWARD | DEBUG_MFC)) 1093 log(LOG_DEBUG, "ip6_mforward: no rte s %s g %s\n", 1094 ip6_sprintf(ip6bufs, &ip6->ip6_src), 1095 ip6_sprintf(ip6bufd, &ip6->ip6_dst)); 1096 #endif 1097 1098 /* 1099 * Allocate mbufs early so that we don't do extra work if we 1100 * are just going to fail anyway. 1101 */ 1102 rte = (struct rtdetq *)malloc(sizeof(*rte), M_MRTABLE6, 1103 M_NOWAIT); 1104 if (rte == NULL) { 1105 splx(s); 1106 return (ENOBUFS); 1107 } 1108 mb0 = m_copy(m, 0, M_COPYALL); 1109 /* 1110 * Pullup packet header if needed before storing it, 1111 * as other references may modify it in the meantime. 1112 */ 1113 if (mb0 && 1114 (M_HASCL(mb0) || mb0->m_len < sizeof(struct ip6_hdr))) 1115 mb0 = m_pullup(mb0, sizeof(struct ip6_hdr)); 1116 if (mb0 == NULL) { 1117 free(rte, M_MRTABLE6); 1118 splx(s); 1119 return (ENOBUFS); 1120 } 1121 1122 /* is there an upcall waiting for this packet? */ 1123 hash = MF6CHASH(ip6->ip6_src, ip6->ip6_dst); 1124 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 1125 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, 1126 &rt->mf6c_origin.sin6_addr) && 1127 IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, 1128 &rt->mf6c_mcastgrp.sin6_addr) && 1129 (rt->mf6c_stall != NULL)) 1130 break; 1131 } 1132 1133 if (rt == NULL) { 1134 struct mrt6msg *im; 1135 #ifdef MRT6_OINIT 1136 struct omrt6msg *oim; 1137 #endif 1138 1139 /* no upcall, so make a new entry */ 1140 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE6, 1141 M_NOWAIT); 1142 if (rt == NULL) { 1143 free(rte, M_MRTABLE6); 1144 m_freem(mb0); 1145 splx(s); 1146 return (ENOBUFS); 1147 } 1148 /* 1149 * Make a copy of the header to send to the user 1150 * level process 1151 */ 1152 mm = m_copy(mb0, 0, sizeof(struct ip6_hdr)); 1153 1154 if (mm == NULL) { 1155 free(rte, M_MRTABLE6); 1156 m_freem(mb0); 1157 free(rt, M_MRTABLE6); 1158 splx(s); 1159 return (ENOBUFS); 1160 } 1161 1162 /* 1163 * Send message to routing daemon 1164 */ 1165 sin6.sin6_addr = ip6->ip6_src; 1166 1167 im = NULL; 1168 #ifdef MRT6_OINIT 1169 oim = NULL; 1170 #endif 1171 switch (ip6_mrouter_ver) { 1172 #ifdef MRT6_OINIT 1173 case MRT6_OINIT: 1174 oim = mtod(mm, struct omrt6msg *); 1175 oim->im6_msgtype = MRT6MSG_NOCACHE; 1176 oim->im6_mbz = 0; 1177 break; 1178 #endif 1179 case MRT6_INIT: 1180 im = mtod(mm, struct mrt6msg *); 1181 im->im6_msgtype = MRT6MSG_NOCACHE; 1182 im->im6_mbz = 0; 1183 break; 1184 default: 1185 free(rte, M_MRTABLE6); 1186 m_freem(mb0); 1187 free(rt, M_MRTABLE6); 1188 splx(s); 1189 return (EINVAL); 1190 } 1191 1192 #ifdef MRT6DEBUG 1193 if (mrt6debug & DEBUG_FORWARD) 1194 log(LOG_DEBUG, 1195 "getting the iif info in the kernel\n"); 1196 #endif 1197 1198 for (mifp = mif6table, mifi = 0; 1199 mifi < nummifs && mifp->m6_ifp != ifp; 1200 mifp++, mifi++) 1201 ; 1202 1203 switch (ip6_mrouter_ver) { 1204 #ifdef MRT6_OINIT 1205 case MRT6_OINIT: 1206 oim->im6_mif = mifi; 1207 break; 1208 #endif 1209 case MRT6_INIT: 1210 im->im6_mif = mifi; 1211 break; 1212 } 1213 1214 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1215 log(LOG_WARNING, "ip6_mforward: ip6_mrouter " 1216 "socket queue full\n"); 1217 mrt6stat.mrt6s_upq_sockfull++; 1218 free(rte, M_MRTABLE6); 1219 m_freem(mb0); 1220 free(rt, M_MRTABLE6); 1221 splx(s); 1222 return (ENOBUFS); 1223 } 1224 1225 mrt6stat.mrt6s_upcalls++; 1226 1227 /* insert new entry at head of hash chain */ 1228 bzero(rt, sizeof(*rt)); 1229 rt->mf6c_origin.sin6_family = AF_INET6; 1230 rt->mf6c_origin.sin6_len = sizeof(struct sockaddr_in6); 1231 rt->mf6c_origin.sin6_addr = ip6->ip6_src; 1232 rt->mf6c_mcastgrp.sin6_family = AF_INET6; 1233 rt->mf6c_mcastgrp.sin6_len = sizeof(struct sockaddr_in6); 1234 rt->mf6c_mcastgrp.sin6_addr = ip6->ip6_dst; 1235 rt->mf6c_expire = UPCALL_EXPIRE; 1236 n6expire[hash]++; 1237 rt->mf6c_parent = MF6C_INCOMPLETE_PARENT; 1238 1239 /* link into table */ 1240 rt->mf6c_next = mf6ctable[hash]; 1241 mf6ctable[hash] = rt; 1242 /* Add this entry to the end of the queue */ 1243 rt->mf6c_stall = rte; 1244 } else { 1245 /* determine if q has overflowed */ 1246 struct rtdetq **p; 1247 int npkts = 0; 1248 1249 for (p = &rt->mf6c_stall; *p != NULL; p = &(*p)->next) 1250 if (++npkts > MAX_UPQ6) { 1251 mrt6stat.mrt6s_upq_ovflw++; 1252 free(rte, M_MRTABLE6); 1253 m_freem(mb0); 1254 splx(s); 1255 return (0); 1256 } 1257 1258 /* Add this entry to the end of the queue */ 1259 *p = rte; 1260 } 1261 1262 rte->next = NULL; 1263 rte->m = mb0; 1264 rte->ifp = ifp; 1265 #ifdef UPCALL_TIMING 1266 rte->t = tp; 1267 #endif /* UPCALL_TIMING */ 1268 1269 splx(s); 1270 1271 return (0); 1272 } 1273 } 1274 1275 /* 1276 * Clean up cache entries if upcalls are not serviced 1277 * Call from the Slow Timeout mechanism, every half second. 1278 */ 1279 static void 1280 expire_upcalls(unused) 1281 void *unused; 1282 { 1283 struct rtdetq *rte; 1284 struct mf6c *mfc, **nptr; 1285 int i; 1286 int s; 1287 1288 s = splnet(); 1289 for (i = 0; i < MF6CTBLSIZ; i++) { 1290 if (n6expire[i] == 0) 1291 continue; 1292 nptr = &mf6ctable[i]; 1293 while ((mfc = *nptr) != NULL) { 1294 rte = mfc->mf6c_stall; 1295 /* 1296 * Skip real cache entries 1297 * Make sure it wasn't marked to not expire (shouldn't happen) 1298 * If it expires now 1299 */ 1300 if (rte != NULL && 1301 mfc->mf6c_expire != 0 && 1302 --mfc->mf6c_expire == 0) { 1303 #ifdef MRT6DEBUG 1304 if (mrt6debug & DEBUG_EXPIRE) { 1305 char ip6bufo[INET6_ADDRSTRLEN]; 1306 char ip6bufg[INET6_ADDRSTRLEN]; 1307 log(LOG_DEBUG, "expire_upcalls: expiring (%s %s)\n", 1308 ip6_sprintf(ip6bufo, &mfc->mf6c_origin.sin6_addr), 1309 ip6_sprintf(ip6bufg, &mfc->mf6c_mcastgrp.sin6_addr)); 1310 } 1311 #endif 1312 /* 1313 * drop all the packets 1314 * free the mbuf with the pkt, if, timing info 1315 */ 1316 do { 1317 struct rtdetq *n = rte->next; 1318 m_freem(rte->m); 1319 free(rte, M_MRTABLE6); 1320 rte = n; 1321 } while (rte != NULL); 1322 mrt6stat.mrt6s_cache_cleanups++; 1323 n6expire[i]--; 1324 1325 *nptr = mfc->mf6c_next; 1326 free(mfc, M_MRTABLE6); 1327 } else { 1328 nptr = &mfc->mf6c_next; 1329 } 1330 } 1331 } 1332 splx(s); 1333 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 1334 expire_upcalls, NULL); 1335 } 1336 1337 /* 1338 * Packet forwarding routine once entry in the cache is made 1339 */ 1340 static int 1341 ip6_mdq(m, ifp, rt) 1342 struct mbuf *m; 1343 struct ifnet *ifp; 1344 struct mf6c *rt; 1345 { 1346 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 1347 mifi_t mifi, iif; 1348 struct mif6 *mifp; 1349 int plen = m->m_pkthdr.len; 1350 struct in6_addr src0, dst0; /* copies for local work */ 1351 u_int32_t iszone, idzone, oszone, odzone; 1352 int error = 0; 1353 1354 /* 1355 * Macro to send packet on mif. Since RSVP packets don't get counted on 1356 * input, they shouldn't get counted on output, so statistics keeping is 1357 * separate. 1358 */ 1359 1360 #define MC6_SEND(ip6, mifp, m) do { \ 1361 if ((mifp)->m6_flags & MIFF_REGISTER) \ 1362 register_send((ip6), (mifp), (m)); \ 1363 else \ 1364 phyint_send((ip6), (mifp), (m)); \ 1365 } while (/*CONSTCOND*/ 0) 1366 1367 /* 1368 * Don't forward if it didn't arrive from the parent mif 1369 * for its origin. 1370 */ 1371 mifi = rt->mf6c_parent; 1372 if ((mifi >= nummifs) || (mif6table[mifi].m6_ifp != ifp)) { 1373 /* came in the wrong interface */ 1374 #ifdef MRT6DEBUG 1375 if (mrt6debug & DEBUG_FORWARD) 1376 log(LOG_DEBUG, 1377 "wrong if: ifid %d mifi %d mififid %x\n", 1378 ifp->if_index, mifi, 1379 mif6table[mifi].m6_ifp->if_index); 1380 #endif 1381 mrt6stat.mrt6s_wrong_if++; 1382 rt->mf6c_wrong_if++; 1383 /* 1384 * If we are doing PIM processing, and we are forwarding 1385 * packets on this interface, send a message to the 1386 * routing daemon. 1387 */ 1388 /* have to make sure this is a valid mif */ 1389 if (mifi < nummifs && mif6table[mifi].m6_ifp) 1390 if (pim6 && (m->m_flags & M_LOOP) == 0) { 1391 /* 1392 * Check the M_LOOP flag to avoid an 1393 * unnecessary PIM assert. 1394 * XXX: M_LOOP is an ad-hoc hack... 1395 */ 1396 static struct sockaddr_in6 sin6 = 1397 { sizeof(sin6), AF_INET6 }; 1398 1399 struct mbuf *mm; 1400 struct mrt6msg *im; 1401 #ifdef MRT6_OINIT 1402 struct omrt6msg *oim; 1403 #endif 1404 1405 mm = m_copy(m, 0, sizeof(struct ip6_hdr)); 1406 if (mm && 1407 (M_HASCL(mm) || 1408 mm->m_len < sizeof(struct ip6_hdr))) 1409 mm = m_pullup(mm, sizeof(struct ip6_hdr)); 1410 if (mm == NULL) 1411 return (ENOBUFS); 1412 1413 #ifdef MRT6_OINIT 1414 oim = NULL; 1415 #endif 1416 im = NULL; 1417 switch (ip6_mrouter_ver) { 1418 #ifdef MRT6_OINIT 1419 case MRT6_OINIT: 1420 oim = mtod(mm, struct omrt6msg *); 1421 oim->im6_msgtype = MRT6MSG_WRONGMIF; 1422 oim->im6_mbz = 0; 1423 break; 1424 #endif 1425 case MRT6_INIT: 1426 im = mtod(mm, struct mrt6msg *); 1427 im->im6_msgtype = MRT6MSG_WRONGMIF; 1428 im->im6_mbz = 0; 1429 break; 1430 default: 1431 m_freem(mm); 1432 return (EINVAL); 1433 } 1434 1435 for (mifp = mif6table, iif = 0; 1436 iif < nummifs && mifp && 1437 mifp->m6_ifp != ifp; 1438 mifp++, iif++) 1439 ; 1440 1441 switch (ip6_mrouter_ver) { 1442 #ifdef MRT6_OINIT 1443 case MRT6_OINIT: 1444 oim->im6_mif = iif; 1445 sin6.sin6_addr = oim->im6_src; 1446 break; 1447 #endif 1448 case MRT6_INIT: 1449 im->im6_mif = iif; 1450 sin6.sin6_addr = im->im6_src; 1451 break; 1452 } 1453 1454 mrt6stat.mrt6s_upcalls++; 1455 1456 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1457 #ifdef MRT6DEBUG 1458 if (mrt6debug) 1459 log(LOG_WARNING, "mdq, ip6_mrouter socket queue full\n"); 1460 #endif 1461 ++mrt6stat.mrt6s_upq_sockfull; 1462 return (ENOBUFS); 1463 } /* if socket Q full */ 1464 } /* if PIM */ 1465 return (0); 1466 } /* if wrong iif */ 1467 1468 /* If I sourced this packet, it counts as output, else it was input. */ 1469 if (m->m_pkthdr.rcvif == NULL) { 1470 /* XXX: is rcvif really NULL when output?? */ 1471 mif6table[mifi].m6_pkt_out++; 1472 mif6table[mifi].m6_bytes_out += plen; 1473 } else { 1474 mif6table[mifi].m6_pkt_in++; 1475 mif6table[mifi].m6_bytes_in += plen; 1476 } 1477 rt->mf6c_pkt_cnt++; 1478 rt->mf6c_byte_cnt += plen; 1479 1480 /* 1481 * For each mif, forward a copy of the packet if there are group 1482 * members downstream on the interface. 1483 */ 1484 src0 = ip6->ip6_src; 1485 dst0 = ip6->ip6_dst; 1486 if ((error = in6_setscope(&src0, ifp, &iszone)) != 0 || 1487 (error = in6_setscope(&dst0, ifp, &idzone)) != 0) { 1488 ip6stat.ip6s_badscope++; 1489 return (error); 1490 } 1491 for (mifp = mif6table, mifi = 0; mifi < nummifs; mifp++, mifi++) { 1492 if (IF_ISSET(mifi, &rt->mf6c_ifset)) { 1493 /* 1494 * check if the outgoing packet is going to break 1495 * a scope boundary. 1496 * XXX For packets through PIM register tunnel 1497 * interface, we believe a routing daemon. 1498 */ 1499 if (!(mif6table[rt->mf6c_parent].m6_flags & 1500 MIFF_REGISTER) && 1501 !(mif6table[mifi].m6_flags & MIFF_REGISTER)) { 1502 if (in6_setscope(&src0, mif6table[mifi].m6_ifp, 1503 &oszone) || 1504 in6_setscope(&dst0, mif6table[mifi].m6_ifp, 1505 &odzone) || 1506 iszone != oszone || 1507 idzone != odzone) { 1508 ip6stat.ip6s_badscope++; 1509 continue; 1510 } 1511 } 1512 1513 mifp->m6_pkt_out++; 1514 mifp->m6_bytes_out += plen; 1515 MC6_SEND(ip6, mifp, m); 1516 } 1517 } 1518 return (0); 1519 } 1520 1521 static void 1522 phyint_send(ip6, mifp, m) 1523 struct ip6_hdr *ip6; 1524 struct mif6 *mifp; 1525 struct mbuf *m; 1526 { 1527 struct mbuf *mb_copy; 1528 struct ifnet *ifp = mifp->m6_ifp; 1529 int error = 0; 1530 int s = splnet(); /* needs to protect static "ro" below. */ 1531 static struct route_in6 ro; 1532 struct in6_multi *in6m; 1533 struct sockaddr_in6 *dst6; 1534 u_long linkmtu; 1535 1536 /* 1537 * Make a new reference to the packet; make sure that 1538 * the IPv6 header is actually copied, not just referenced, 1539 * so that ip6_output() only scribbles on the copy. 1540 */ 1541 mb_copy = m_copy(m, 0, M_COPYALL); 1542 if (mb_copy && 1543 (M_HASCL(mb_copy) || mb_copy->m_len < sizeof(struct ip6_hdr))) 1544 mb_copy = m_pullup(mb_copy, sizeof(struct ip6_hdr)); 1545 if (mb_copy == NULL) { 1546 splx(s); 1547 return; 1548 } 1549 /* set MCAST flag to the outgoing packet */ 1550 mb_copy->m_flags |= M_MCAST; 1551 1552 /* 1553 * If we sourced the packet, call ip6_output since we may devide 1554 * the packet into fragments when the packet is too big for the 1555 * outgoing interface. 1556 * Otherwise, we can simply send the packet to the interface 1557 * sending queue. 1558 */ 1559 if (m->m_pkthdr.rcvif == NULL) { 1560 struct ip6_moptions im6o; 1561 1562 im6o.im6o_multicast_ifp = ifp; 1563 /* XXX: ip6_output will override ip6->ip6_hlim */ 1564 im6o.im6o_multicast_hlim = ip6->ip6_hlim; 1565 im6o.im6o_multicast_loop = 1; 1566 error = ip6_output(mb_copy, NULL, &ro, 1567 IPV6_FORWARDING, &im6o, NULL, NULL); 1568 1569 #ifdef MRT6DEBUG 1570 if (mrt6debug & DEBUG_XMIT) 1571 log(LOG_DEBUG, "phyint_send on mif %d err %d\n", 1572 mifp - mif6table, error); 1573 #endif 1574 splx(s); 1575 return; 1576 } 1577 1578 /* 1579 * If we belong to the destination multicast group 1580 * on the outgoing interface, loop back a copy. 1581 */ 1582 dst6 = (struct sockaddr_in6 *)&ro.ro_dst; 1583 IN6_LOOKUP_MULTI(ip6->ip6_dst, ifp, in6m); 1584 if (in6m != NULL) { 1585 dst6->sin6_len = sizeof(struct sockaddr_in6); 1586 dst6->sin6_family = AF_INET6; 1587 dst6->sin6_addr = ip6->ip6_dst; 1588 ip6_mloopback(ifp, m, (struct sockaddr_in6 *)&ro.ro_dst); 1589 } 1590 /* 1591 * Put the packet into the sending queue of the outgoing interface 1592 * if it would fit in the MTU of the interface. 1593 */ 1594 linkmtu = IN6_LINKMTU(ifp); 1595 if (mb_copy->m_pkthdr.len <= linkmtu || linkmtu < IPV6_MMTU) { 1596 dst6->sin6_len = sizeof(struct sockaddr_in6); 1597 dst6->sin6_family = AF_INET6; 1598 dst6->sin6_addr = ip6->ip6_dst; 1599 /* 1600 * We just call if_output instead of nd6_output here, since 1601 * we need no ND for a multicast forwarded packet...right? 1602 */ 1603 error = (*ifp->if_output)(ifp, mb_copy, 1604 (struct sockaddr *)&ro.ro_dst, NULL); 1605 #ifdef MRT6DEBUG 1606 if (mrt6debug & DEBUG_XMIT) 1607 log(LOG_DEBUG, "phyint_send on mif %d err %d\n", 1608 mifp - mif6table, error); 1609 #endif 1610 } else { 1611 /* 1612 * pMTU discovery is intentionally disabled by default, since 1613 * various router may notify pMTU in multicast, which can be 1614 * a DDoS to a router 1615 */ 1616 if (ip6_mcast_pmtu) 1617 icmp6_error(mb_copy, ICMP6_PACKET_TOO_BIG, 0, linkmtu); 1618 else { 1619 #ifdef MRT6DEBUG 1620 if (mrt6debug & DEBUG_XMIT) { 1621 char ip6bufs[INET6_ADDRSTRLEN]; 1622 char ip6bufd[INET6_ADDRSTRLEN]; 1623 log(LOG_DEBUG, 1624 "phyint_send: packet too big on %s o %s " 1625 "g %s size %d(discarded)\n", 1626 if_name(ifp), 1627 ip6_sprintf(ip6bufs, &ip6->ip6_src), 1628 ip6_sprintf(ip6bufd, &ip6->ip6_dst), 1629 mb_copy->m_pkthdr.len); 1630 } 1631 #endif /* MRT6DEBUG */ 1632 m_freem(mb_copy); /* simply discard the packet */ 1633 } 1634 } 1635 1636 splx(s); 1637 } 1638 1639 static int 1640 register_send(ip6, mif, m) 1641 struct ip6_hdr *ip6; 1642 struct mif6 *mif; 1643 struct mbuf *m; 1644 { 1645 struct mbuf *mm; 1646 int i, len = m->m_pkthdr.len; 1647 static struct sockaddr_in6 sin6 = { sizeof(sin6), AF_INET6 }; 1648 struct mrt6msg *im6; 1649 1650 #ifdef MRT6DEBUG 1651 if (mrt6debug) { 1652 char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN]; 1653 log(LOG_DEBUG, "** IPv6 register_send **\n src %s dst %s\n", 1654 ip6_sprintf(ip6bufs, &ip6->ip6_src), 1655 ip6_sprintf(ip6bufd, &ip6->ip6_dst)); 1656 } 1657 #endif 1658 ++pim6stat.pim6s_snd_registers; 1659 1660 /* Make a copy of the packet to send to the user level process */ 1661 MGETHDR(mm, M_DONTWAIT, MT_HEADER); 1662 if (mm == NULL) 1663 return (ENOBUFS); 1664 mm->m_pkthdr.rcvif = NULL; 1665 mm->m_data += max_linkhdr; 1666 mm->m_len = sizeof(struct ip6_hdr); 1667 1668 if ((mm->m_next = m_copy(m, 0, M_COPYALL)) == NULL) { 1669 m_freem(mm); 1670 return (ENOBUFS); 1671 } 1672 i = MHLEN - M_LEADINGSPACE(mm); 1673 if (i > len) 1674 i = len; 1675 mm = m_pullup(mm, i); 1676 if (mm == NULL) 1677 return (ENOBUFS); 1678 /* TODO: check it! */ 1679 mm->m_pkthdr.len = len + sizeof(struct ip6_hdr); 1680 1681 /* 1682 * Send message to routing daemon 1683 */ 1684 sin6.sin6_addr = ip6->ip6_src; 1685 1686 im6 = mtod(mm, struct mrt6msg *); 1687 im6->im6_msgtype = MRT6MSG_WHOLEPKT; 1688 im6->im6_mbz = 0; 1689 1690 im6->im6_mif = mif - mif6table; 1691 1692 /* iif info is not given for reg. encap.n */ 1693 mrt6stat.mrt6s_upcalls++; 1694 1695 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1696 #ifdef MRT6DEBUG 1697 if (mrt6debug) 1698 log(LOG_WARNING, 1699 "register_send: ip6_mrouter socket queue full\n"); 1700 #endif 1701 ++mrt6stat.mrt6s_upq_sockfull; 1702 return (ENOBUFS); 1703 } 1704 return (0); 1705 } 1706 1707 /* 1708 * PIM sparse mode hook 1709 * Receives the pim control messages, and passes them up to the listening 1710 * socket, using rip6_input. 1711 * The only message processed is the REGISTER pim message; the pim header 1712 * is stripped off, and the inner packet is passed to register_mforward. 1713 */ 1714 int 1715 pim6_input(mp, offp, proto) 1716 struct mbuf **mp; 1717 int *offp, proto; 1718 { 1719 struct pim *pim; /* pointer to a pim struct */ 1720 struct ip6_hdr *ip6; 1721 int pimlen; 1722 struct mbuf *m = *mp; 1723 int minlen; 1724 int off = *offp; 1725 1726 ++pim6stat.pim6s_rcv_total; 1727 1728 ip6 = mtod(m, struct ip6_hdr *); 1729 pimlen = m->m_pkthdr.len - *offp; 1730 1731 /* 1732 * Validate lengths 1733 */ 1734 if (pimlen < PIM_MINLEN) { 1735 ++pim6stat.pim6s_rcv_tooshort; 1736 #ifdef MRT6DEBUG 1737 if (mrt6debug & DEBUG_PIM) 1738 log(LOG_DEBUG,"pim6_input: PIM packet too short\n"); 1739 #endif 1740 m_freem(m); 1741 return (IPPROTO_DONE); 1742 } 1743 1744 /* 1745 * if the packet is at least as big as a REGISTER, go ahead 1746 * and grab the PIM REGISTER header size, to avoid another 1747 * possible m_pullup() later. 1748 * 1749 * PIM_MINLEN == pimhdr + u_int32 == 8 1750 * PIM6_REG_MINLEN == pimhdr + reghdr + eip6hdr == 4 + 4 + 40 1751 */ 1752 minlen = (pimlen >= PIM6_REG_MINLEN) ? PIM6_REG_MINLEN : PIM_MINLEN; 1753 1754 /* 1755 * Make sure that the IP6 and PIM headers in contiguous memory, and 1756 * possibly the PIM REGISTER header 1757 */ 1758 #ifndef PULLDOWN_TEST 1759 IP6_EXTHDR_CHECK(m, off, minlen, IPPROTO_DONE); 1760 /* adjust pointer */ 1761 ip6 = mtod(m, struct ip6_hdr *); 1762 1763 /* adjust mbuf to point to the PIM header */ 1764 pim = (struct pim *)((caddr_t)ip6 + off); 1765 #else 1766 IP6_EXTHDR_GET(pim, struct pim *, m, off, minlen); 1767 if (pim == NULL) { 1768 pim6stat.pim6s_rcv_tooshort++; 1769 return (IPPROTO_DONE); 1770 } 1771 #endif 1772 1773 #define PIM6_CHECKSUM 1774 #ifdef PIM6_CHECKSUM 1775 { 1776 int cksumlen; 1777 1778 /* 1779 * Validate checksum. 1780 * If PIM REGISTER, exclude the data packet 1781 */ 1782 if (pim->pim_type == PIM_REGISTER) 1783 cksumlen = PIM_MINLEN; 1784 else 1785 cksumlen = pimlen; 1786 1787 if (in6_cksum(m, IPPROTO_PIM, off, cksumlen)) { 1788 ++pim6stat.pim6s_rcv_badsum; 1789 #ifdef MRT6DEBUG 1790 if (mrt6debug & DEBUG_PIM) 1791 log(LOG_DEBUG, 1792 "pim6_input: invalid checksum\n"); 1793 #endif 1794 m_freem(m); 1795 return (IPPROTO_DONE); 1796 } 1797 } 1798 #endif /* PIM_CHECKSUM */ 1799 1800 /* PIM version check */ 1801 if (pim->pim_ver != PIM_VERSION) { 1802 ++pim6stat.pim6s_rcv_badversion; 1803 #ifdef MRT6DEBUG 1804 log(LOG_ERR, 1805 "pim6_input: incorrect version %d, expecting %d\n", 1806 pim->pim_ver, PIM_VERSION); 1807 #endif 1808 m_freem(m); 1809 return (IPPROTO_DONE); 1810 } 1811 1812 if (pim->pim_type == PIM_REGISTER) { 1813 /* 1814 * since this is a REGISTER, we'll make a copy of the register 1815 * headers ip6+pim+u_int32_t+encap_ip6, to be passed up to the 1816 * routing daemon. 1817 */ 1818 static struct sockaddr_in6 dst = { sizeof(dst), AF_INET6 }; 1819 1820 struct mbuf *mcp; 1821 struct ip6_hdr *eip6; 1822 u_int32_t *reghdr; 1823 int rc; 1824 #ifdef MRT6DEBUG 1825 char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN]; 1826 #endif 1827 1828 ++pim6stat.pim6s_rcv_registers; 1829 1830 if ((reg_mif_num >= nummifs) || (reg_mif_num == (mifi_t) -1)) { 1831 #ifdef MRT6DEBUG 1832 if (mrt6debug & DEBUG_PIM) 1833 log(LOG_DEBUG, 1834 "pim6_input: register mif not set: %d\n", 1835 reg_mif_num); 1836 #endif 1837 m_freem(m); 1838 return (IPPROTO_DONE); 1839 } 1840 1841 reghdr = (u_int32_t *)(pim + 1); 1842 1843 if ((ntohl(*reghdr) & PIM_NULL_REGISTER)) 1844 goto pim6_input_to_daemon; 1845 1846 /* 1847 * Validate length 1848 */ 1849 if (pimlen < PIM6_REG_MINLEN) { 1850 ++pim6stat.pim6s_rcv_tooshort; 1851 ++pim6stat.pim6s_rcv_badregisters; 1852 #ifdef MRT6DEBUG 1853 log(LOG_ERR, 1854 "pim6_input: register packet size too " 1855 "small %d from %s\n", 1856 pimlen, ip6_sprintf(ip6bufs, &ip6->ip6_src)); 1857 #endif 1858 m_freem(m); 1859 return (IPPROTO_DONE); 1860 } 1861 1862 eip6 = (struct ip6_hdr *) (reghdr + 1); 1863 #ifdef MRT6DEBUG 1864 if (mrt6debug & DEBUG_PIM) 1865 log(LOG_DEBUG, 1866 "pim6_input[register], eip6: %s -> %s, " 1867 "eip6 plen %d\n", 1868 ip6_sprintf(ip6bufs, &eip6->ip6_src), 1869 ip6_sprintf(ip6bufd, &eip6->ip6_dst), 1870 ntohs(eip6->ip6_plen)); 1871 #endif 1872 1873 /* verify the version number of the inner packet */ 1874 if ((eip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) { 1875 ++pim6stat.pim6s_rcv_badregisters; 1876 #ifdef MRT6DEBUG 1877 log(LOG_DEBUG, "pim6_input: invalid IP version (%d) " 1878 "of the inner packet\n", 1879 (eip6->ip6_vfc & IPV6_VERSION)); 1880 #endif 1881 m_freem(m); 1882 return (IPPROTO_NONE); 1883 } 1884 1885 /* verify the inner packet is destined to a mcast group */ 1886 if (!IN6_IS_ADDR_MULTICAST(&eip6->ip6_dst)) { 1887 ++pim6stat.pim6s_rcv_badregisters; 1888 #ifdef MRT6DEBUG 1889 if (mrt6debug & DEBUG_PIM) 1890 log(LOG_DEBUG, 1891 "pim6_input: inner packet of register " 1892 "is not multicast %s\n", 1893 ip6_sprintf(ip6bufd, &eip6->ip6_dst)); 1894 #endif 1895 m_freem(m); 1896 return (IPPROTO_DONE); 1897 } 1898 1899 /* 1900 * make a copy of the whole header to pass to the daemon later. 1901 */ 1902 mcp = m_copy(m, 0, off + PIM6_REG_MINLEN); 1903 if (mcp == NULL) { 1904 #ifdef MRT6DEBUG 1905 log(LOG_ERR, 1906 "pim6_input: pim register: " 1907 "could not copy register head\n"); 1908 #endif 1909 m_freem(m); 1910 return (IPPROTO_DONE); 1911 } 1912 1913 /* 1914 * forward the inner ip6 packet; point m_data at the inner ip6. 1915 */ 1916 m_adj(m, off + PIM_MINLEN); 1917 #ifdef MRT6DEBUG 1918 if (mrt6debug & DEBUG_PIM) { 1919 log(LOG_DEBUG, 1920 "pim6_input: forwarding decapsulated register: " 1921 "src %s, dst %s, mif %d\n", 1922 ip6_sprintf(ip6bufs, &eip6->ip6_src), 1923 ip6_sprintf(ip6bufd, &eip6->ip6_dst), 1924 reg_mif_num); 1925 } 1926 #endif 1927 1928 rc = if_simloop(mif6table[reg_mif_num].m6_ifp, m, 1929 dst.sin6_family, 0); 1930 1931 /* prepare the register head to send to the mrouting daemon */ 1932 m = mcp; 1933 } 1934 1935 /* 1936 * Pass the PIM message up to the daemon; if it is a register message 1937 * pass the 'head' only up to the daemon. This includes the 1938 * encapsulator ip6 header, pim header, register header and the 1939 * encapsulated ip6 header. 1940 */ 1941 pim6_input_to_daemon: 1942 rip6_input(&m, offp, proto); 1943 return (IPPROTO_DONE); 1944 } 1945