1 /* $NetBSD: ip6_mroute.c,v 1.69 2006/01/21 00:15:36 rpaulo Exp $ */ 2 /* $KAME: ip6_mroute.c,v 1.49 2001/07/25 09:21:18 jinmei 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) 1992, 1993 37 * The Regents of the University of California. All rights reserved. 38 * 39 * This code is derived from software contributed to Berkeley by 40 * Stephen Deering of Stanford University. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. Neither the name of the University nor the names of its contributors 51 * may be used to endorse or promote products derived from this software 52 * without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 64 * SUCH DAMAGE. 65 * 66 * @(#)ip_mroute.c 8.2 (Berkeley) 11/15/93 67 */ 68 69 /* 70 * Copyright (c) 1989 Stephen Deering 71 * 72 * This code is derived from software contributed to Berkeley by 73 * Stephen Deering of Stanford University. 74 * 75 * Redistribution and use in source and binary forms, with or without 76 * modification, are permitted provided that the following conditions 77 * are met: 78 * 1. Redistributions of source code must retain the above copyright 79 * notice, this list of conditions and the following disclaimer. 80 * 2. Redistributions in binary form must reproduce the above copyright 81 * notice, this list of conditions and the following disclaimer in the 82 * documentation and/or other materials provided with the distribution. 83 * 3. All advertising materials mentioning features or use of this software 84 * must display the following acknowledgement: 85 * This product includes software developed by the University of 86 * California, Berkeley and its contributors. 87 * 4. Neither the name of the University nor the names of its contributors 88 * may be used to endorse or promote products derived from this software 89 * without specific prior written permission. 90 * 91 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 92 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 93 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 94 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 95 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 96 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 97 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 98 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 99 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 100 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 101 * SUCH DAMAGE. 102 * 103 * @(#)ip_mroute.c 8.2 (Berkeley) 11/15/93 104 */ 105 106 /* 107 * IP multicast forwarding procedures 108 * 109 * Written by David Waitzman, BBN Labs, August 1988. 110 * Modified by Steve Deering, Stanford, February 1989. 111 * Modified by Mark J. Steiglitz, Stanford, May, 1991 112 * Modified by Van Jacobson, LBL, January 1993 113 * Modified by Ajit Thyagarajan, PARC, August 1993 114 * Modified by Bill Fenner, PARC, April 1994 115 * 116 * MROUTING Revision: 3.5.1.2 + PIM-SMv2 (pimd) Support 117 */ 118 119 #include <sys/cdefs.h> 120 __KERNEL_RCSID(0, "$NetBSD: ip6_mroute.c,v 1.69 2006/01/21 00:15:36 rpaulo Exp $"); 121 122 #include "opt_inet.h" 123 #include "opt_mrouting.h" 124 125 #include <sys/param.h> 126 #include <sys/systm.h> 127 #include <sys/callout.h> 128 #include <sys/mbuf.h> 129 #include <sys/socket.h> 130 #include <sys/socketvar.h> 131 #include <sys/sockio.h> 132 #include <sys/protosw.h> 133 #include <sys/errno.h> 134 #include <sys/time.h> 135 #include <sys/kernel.h> 136 #include <sys/ioctl.h> 137 #include <sys/sysctl.h> 138 #include <sys/syslog.h> 139 140 #include <net/if.h> 141 #include <net/route.h> 142 #include <net/raw_cb.h> 143 144 #include <netinet/in.h> 145 #include <netinet/in_var.h> 146 #ifdef MULTICAST_PMTUD 147 #include <netinet/icmp6.h> 148 #endif 149 150 #include <netinet/ip6.h> 151 #include <netinet6/ip6_var.h> 152 #include <netinet6/ip6_mroute.h> 153 #include <netinet6/scope6_var.h> 154 #include <netinet6/pim6.h> 155 #include <netinet6/pim6_var.h> 156 #include <netinet6/nd6.h> 157 158 #include <net/net_osdep.h> 159 160 static int ip6_mdq __P((struct mbuf *, struct ifnet *, struct mf6c *)); 161 static void phyint_send __P((struct ip6_hdr *, struct mif6 *, struct mbuf *)); 162 163 static int set_pim6 __P((int *)); 164 static int get_pim6 __P((struct mbuf *)); 165 static int socket_send __P((struct socket *, struct mbuf *, 166 struct sockaddr_in6 *)); 167 static int register_send __P((struct ip6_hdr *, struct mif6 *, struct mbuf *)); 168 169 /* 170 * Globals. All but ip6_mrouter, ip6_mrtproto and mrt6stat could be static, 171 * except for netstat or debugging purposes. 172 */ 173 struct socket *ip6_mrouter = NULL; 174 int ip6_mrouter_ver = 0; 175 int ip6_mrtproto = IPPROTO_PIM; /* for netstat only */ 176 struct mrt6stat mrt6stat; 177 178 #define NO_RTE_FOUND 0x1 179 #define RTE_FOUND 0x2 180 181 struct mf6c *mf6ctable[MF6CTBLSIZ]; 182 u_char n6expire[MF6CTBLSIZ]; 183 struct mif6 mif6table[MAXMIFS]; 184 #ifdef MRT6DEBUG 185 u_int mrt6debug = 0; /* debug level */ 186 #define DEBUG_MFC 0x02 187 #define DEBUG_FORWARD 0x04 188 #define DEBUG_EXPIRE 0x08 189 #define DEBUG_XMIT 0x10 190 #define DEBUG_REG 0x20 191 #define DEBUG_PIM 0x40 192 #endif 193 194 static void expire_upcalls __P((void *)); 195 #define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */ 196 #define UPCALL_EXPIRE 6 /* number of timeouts */ 197 198 #ifdef INET 199 #ifdef MROUTING 200 extern struct socket *ip_mrouter; 201 #endif 202 #endif 203 204 /* 205 * 'Interfaces' associated with decapsulator (so we can tell 206 * packets that went through it from ones that get reflected 207 * by a broken gateway). These interfaces are never linked into 208 * the system ifnet list & no routes point to them. I.e., packets 209 * can't be sent this way. They only exist as a placeholder for 210 * multicast source verification. 211 */ 212 struct ifnet multicast_register_if6; 213 214 #define ENCAP_HOPS 64 215 216 /* 217 * Private variables. 218 */ 219 static mifi_t nummifs = 0; 220 static mifi_t reg_mif_num = (mifi_t)-1; 221 222 struct pim6stat pim6stat; 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 * Quality of service parameter to be added in the future!!! 236 */ 237 238 #define MF6CFIND(o, g, rt) do { \ 239 struct mf6c *_rt = mf6ctable[MF6CHASH(o,g)]; \ 240 rt = NULL; \ 241 mrt6stat.mrt6s_mfc_lookups++; \ 242 while (_rt) { \ 243 if (IN6_ARE_ADDR_EQUAL(&_rt->mf6c_origin.sin6_addr, &(o)) && \ 244 IN6_ARE_ADDR_EQUAL(&_rt->mf6c_mcastgrp.sin6_addr, &(g)) && \ 245 (_rt->mf6c_stall == NULL)) { \ 246 rt = _rt; \ 247 break; \ 248 } \ 249 _rt = _rt->mf6c_next; \ 250 } \ 251 if (rt == NULL) { \ 252 mrt6stat.mrt6s_mfc_misses++; \ 253 } \ 254 } while (/*CONSTCOND*/ 0) 255 256 /* 257 * Macros to compute elapsed time efficiently 258 * Borrowed from Van Jacobson's scheduling code 259 */ 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 #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 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 = CALLOUT_INITIALIZER; 296 297 /* 298 * Handle MRT setsockopt commands to modify the multicast routing tables. 299 */ 300 int 301 ip6_mrouter_set(cmd, so, m) 302 int cmd; 303 struct socket *so; 304 struct mbuf *m; 305 { 306 if (cmd != MRT6_INIT && so != ip6_mrouter) 307 return (EACCES); 308 309 switch (cmd) { 310 #ifdef MRT6_OINIT 311 case MRT6_OINIT: 312 #endif 313 case MRT6_INIT: 314 if (m == NULL || m->m_len < sizeof(int)) 315 return (EINVAL); 316 return (ip6_mrouter_init(so, *mtod(m, int *), cmd)); 317 case MRT6_DONE: 318 return (ip6_mrouter_done()); 319 case MRT6_ADD_MIF: 320 if (m == NULL || m->m_len < sizeof(struct mif6ctl)) 321 return (EINVAL); 322 return (add_m6if(mtod(m, struct mif6ctl *))); 323 case MRT6_DEL_MIF: 324 if (m == NULL || m->m_len < sizeof(mifi_t)) 325 return (EINVAL); 326 return (del_m6if(mtod(m, mifi_t *))); 327 case MRT6_ADD_MFC: 328 if (m == NULL || m->m_len < sizeof(struct mf6cctl)) 329 return (EINVAL); 330 return (add_m6fc(mtod(m, struct mf6cctl *))); 331 case MRT6_DEL_MFC: 332 if (m == NULL || m->m_len < sizeof(struct mf6cctl)) 333 return (EINVAL); 334 return (del_m6fc(mtod(m, struct mf6cctl *))); 335 case MRT6_PIM: 336 if (m == NULL || m->m_len < sizeof(int)) 337 return (EINVAL); 338 return (set_pim6(mtod(m, int *))); 339 default: 340 return (EOPNOTSUPP); 341 } 342 } 343 344 /* 345 * Handle MRT getsockopt commands 346 */ 347 int 348 ip6_mrouter_get(cmd, so, m) 349 int cmd; 350 struct socket *so; 351 struct mbuf **m; 352 { 353 struct mbuf *mb; 354 355 if (so != ip6_mrouter) return EACCES; 356 357 *m = mb = m_get(M_WAIT, MT_SOOPTS); 358 359 switch (cmd) { 360 case MRT6_PIM: 361 return get_pim6(mb); 362 default: 363 m_free(mb); 364 return EOPNOTSUPP; 365 } 366 } 367 368 /* 369 * Handle ioctl commands to obtain information from the cache 370 */ 371 int 372 mrt6_ioctl(cmd, data) 373 int cmd; 374 caddr_t data; 375 { 376 377 switch (cmd) { 378 case SIOCGETSGCNT_IN6: 379 return (get_sg_cnt((struct sioc_sg_req6 *)data)); 380 case SIOCGETMIFCNT_IN6: 381 return (get_mif6_cnt((struct sioc_mif_req6 *)data)); 382 default: 383 return (EINVAL); 384 } 385 } 386 387 /* 388 * returns the packet, byte, rpf-failure count for the source group provided 389 */ 390 static int 391 get_sg_cnt(req) 392 struct sioc_sg_req6 *req; 393 { 394 struct mf6c *rt; 395 int s; 396 397 s = splsoftnet(); 398 MF6CFIND(req->src.sin6_addr, req->grp.sin6_addr, rt); 399 splx(s); 400 if (rt != NULL) { 401 req->pktcnt = rt->mf6c_pkt_cnt; 402 req->bytecnt = rt->mf6c_byte_cnt; 403 req->wrong_if = rt->mf6c_wrong_if; 404 } else 405 return (ESRCH); 406 #if 0 407 req->pktcnt = req->bytecnt = req->wrong_if = 0xffffffff; 408 #endif 409 410 return 0; 411 } 412 413 /* 414 * returns the input and output packet and byte counts on the mif provided 415 */ 416 static int 417 get_mif6_cnt(req) 418 struct sioc_mif_req6 *req; 419 { 420 mifi_t mifi = req->mifi; 421 422 if (mifi >= nummifs) 423 return EINVAL; 424 425 req->icount = mif6table[mifi].m6_pkt_in; 426 req->ocount = mif6table[mifi].m6_pkt_out; 427 req->ibytes = mif6table[mifi].m6_bytes_in; 428 req->obytes = mif6table[mifi].m6_bytes_out; 429 430 return 0; 431 } 432 433 /* 434 * Get PIM processiong global 435 */ 436 static int 437 get_pim6(m) 438 struct mbuf *m; 439 { 440 int *i; 441 442 i = mtod(m, int *); 443 444 *i = pim6; 445 446 return 0; 447 } 448 449 static int 450 set_pim6(i) 451 int *i; 452 { 453 if ((*i != 1) && (*i != 0)) 454 return EINVAL; 455 456 pim6 = *i; 457 458 return 0; 459 } 460 461 /* 462 * Enable multicast routing 463 */ 464 static int 465 ip6_mrouter_init(so, v, cmd) 466 struct socket *so; 467 int v; 468 int cmd; 469 { 470 #ifdef MRT6DEBUG 471 if (mrt6debug) 472 log(LOG_DEBUG, 473 "ip6_mrouter_init: so_type = %d, pr_protocol = %d\n", 474 so->so_type, so->so_proto->pr_protocol); 475 #endif 476 477 if (so->so_type != SOCK_RAW || 478 so->so_proto->pr_protocol != IPPROTO_ICMPV6) 479 return (EOPNOTSUPP); 480 481 if (v != 1) 482 return (ENOPROTOOPT); 483 484 if (ip6_mrouter != NULL) 485 return (EADDRINUSE); 486 487 ip6_mrouter = so; 488 ip6_mrouter_ver = cmd; 489 490 bzero((caddr_t)mf6ctable, sizeof(mf6ctable)); 491 bzero((caddr_t)n6expire, sizeof(n6expire)); 492 493 pim6 = 0;/* used for stubbing out/in pim stuff */ 494 495 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 496 expire_upcalls, NULL); 497 498 #ifdef MRT6DEBUG 499 if (mrt6debug) 500 log(LOG_DEBUG, "ip6_mrouter_init\n"); 501 #endif 502 503 return 0; 504 } 505 506 /* 507 * Disable multicast routing 508 */ 509 int 510 ip6_mrouter_done() 511 { 512 mifi_t mifi; 513 int i; 514 struct ifnet *ifp; 515 struct in6_ifreq ifr; 516 struct mf6c *rt; 517 struct rtdetq *rte; 518 int s; 519 520 s = splsoftnet(); 521 522 /* 523 * For each phyint in use, disable promiscuous reception of all IPv6 524 * multicasts. 525 */ 526 #ifdef INET 527 #ifdef MROUTING 528 /* 529 * If there is still IPv4 multicast routing daemon, 530 * we remain interfaces to receive all muliticasted packets. 531 * XXX: there may be an interface in which the IPv4 multicast 532 * daemon is not interested... 533 */ 534 if (!ip_mrouter) 535 #endif 536 #endif 537 { 538 for (mifi = 0; mifi < nummifs; mifi++) { 539 if (mif6table[mifi].m6_ifp && 540 !(mif6table[mifi].m6_flags & MIFF_REGISTER)) { 541 ifr.ifr_addr.sin6_family = AF_INET6; 542 ifr.ifr_addr.sin6_addr= in6addr_any; 543 ifp = mif6table[mifi].m6_ifp; 544 (*ifp->if_ioctl)(ifp, SIOCDELMULTI, 545 (caddr_t)&ifr); 546 } 547 } 548 } 549 #ifdef notyet 550 bzero((caddr_t)qtable, sizeof(qtable)); 551 bzero((caddr_t)tbftable, sizeof(tbftable)); 552 #endif 553 bzero((caddr_t)mif6table, sizeof(mif6table)); 554 nummifs = 0; 555 556 pim6 = 0; /* used to stub out/in pim specific code */ 557 558 callout_stop(&expire_upcalls_ch); 559 560 /* 561 * Free all multicast forwarding cache entries. 562 */ 563 for (i = 0; i < MF6CTBLSIZ; i++) { 564 rt = mf6ctable[i]; 565 while (rt) { 566 struct mf6c *frt; 567 568 for (rte = rt->mf6c_stall; rte != NULL; ) { 569 struct rtdetq *n = rte->next; 570 571 m_free(rte->m); 572 free(rte, M_MRTABLE); 573 rte = n; 574 } 575 frt = rt; 576 rt = rt->mf6c_next; 577 free(frt, M_MRTABLE); 578 } 579 } 580 581 bzero((caddr_t)mf6ctable, sizeof(mf6ctable)); 582 583 /* 584 * Reset register interface 585 */ 586 if (reg_mif_num != (mifi_t)-1) { 587 if_detach(&multicast_register_if6); 588 reg_mif_num = (mifi_t)-1; 589 } 590 591 ip6_mrouter = NULL; 592 ip6_mrouter_ver = 0; 593 594 splx(s); 595 596 #ifdef MRT6DEBUG 597 if (mrt6debug) 598 log(LOG_DEBUG, "ip6_mrouter_done\n"); 599 #endif 600 601 return 0; 602 } 603 604 void 605 ip6_mrouter_detach(ifp) 606 struct ifnet *ifp; 607 { 608 struct rtdetq *rte; 609 struct mf6c *mfc; 610 mifi_t mifi; 611 int i; 612 613 /* 614 * Delete a mif which points to ifp. 615 */ 616 for (mifi = 0; mifi < nummifs; mifi++) 617 if (mif6table[mifi].m6_ifp == ifp) 618 del_m6if(&mifi); 619 620 /* 621 * Clear rte->ifp of cache entries received on ifp. 622 */ 623 for (i = 0; i < MF6CTBLSIZ; i++) { 624 if (n6expire[i] == 0) 625 continue; 626 627 for (mfc = mf6ctable[i]; mfc != NULL; mfc = mfc->mf6c_next) { 628 for (rte = mfc->mf6c_stall; rte != NULL; rte = rte->next) { 629 if (rte->ifp == ifp) 630 rte->ifp = NULL; 631 } 632 } 633 } 634 } 635 636 637 /* 638 * Add a mif to the mif table 639 */ 640 static int 641 add_m6if(mifcp) 642 struct mif6ctl *mifcp; 643 { 644 struct mif6 *mifp; 645 struct ifnet *ifp; 646 struct in6_ifreq ifr; 647 int error, s; 648 #ifdef notyet 649 struct tbf *m_tbf = tbftable + mifcp->mif6c_mifi; 650 #endif 651 652 if (mifcp->mif6c_mifi >= MAXMIFS) 653 return EINVAL; 654 mifp = mif6table + mifcp->mif6c_mifi; 655 if (mifp->m6_ifp) 656 return EADDRINUSE; /* XXX: is it appropriate? */ 657 if (mifcp->mif6c_pifi == 0 || mifcp->mif6c_pifi >= if_indexlim) 658 return ENXIO; 659 /* 660 * XXX: some OSes can remove ifp and clear ifindex2ifnet[id] 661 * even for id between 0 and if_index. 662 */ 663 if ((ifp = ifindex2ifnet[mifcp->mif6c_pifi]) == NULL) 664 return ENXIO; 665 666 if (mifcp->mif6c_flags & MIFF_REGISTER) { 667 ifp = &multicast_register_if6; 668 669 if (reg_mif_num == (mifi_t)-1) { 670 strlcpy(ifp->if_xname, "register_mif", 671 sizeof(ifp->if_xname)); 672 ifp->if_flags |= IFF_LOOPBACK; 673 ifp->if_index = mifcp->mif6c_mifi; 674 reg_mif_num = mifcp->mif6c_mifi; 675 if_attach(ifp); 676 } 677 678 } /* if REGISTER */ 679 else { 680 /* Make sure the interface supports multicast */ 681 if ((ifp->if_flags & IFF_MULTICAST) == 0) 682 return EOPNOTSUPP; 683 684 s = splsoftnet(); 685 /* 686 * Enable promiscuous reception of all IPv6 multicasts 687 * from the interface. 688 */ 689 ifr.ifr_addr.sin6_family = AF_INET6; 690 ifr.ifr_addr.sin6_addr = in6addr_any; 691 error = (*ifp->if_ioctl)(ifp, SIOCADDMULTI, (caddr_t)&ifr); 692 splx(s); 693 if (error) 694 return error; 695 } 696 697 s = splsoftnet(); 698 mifp->m6_flags = mifcp->mif6c_flags; 699 mifp->m6_ifp = ifp; 700 #ifdef notyet 701 /* scaling up here allows division by 1024 in critical code */ 702 mifp->m6_rate_limit = mifcp->mif6c_rate_limit * 1024 / 1000; 703 #endif 704 /* initialize per mif pkt counters */ 705 mifp->m6_pkt_in = 0; 706 mifp->m6_pkt_out = 0; 707 mifp->m6_bytes_in = 0; 708 mifp->m6_bytes_out = 0; 709 splx(s); 710 711 /* Adjust nummifs up if the mifi is higher than nummifs */ 712 if (nummifs <= mifcp->mif6c_mifi) 713 nummifs = mifcp->mif6c_mifi + 1; 714 715 #ifdef MRT6DEBUG 716 if (mrt6debug) 717 log(LOG_DEBUG, 718 "add_mif #%d, phyint %s%d\n", 719 mifcp->mif6c_mifi, 720 ifp->if_name, ifp->if_unit); 721 #endif 722 723 return 0; 724 } 725 726 /* 727 * Delete a mif from the mif table 728 */ 729 static int 730 del_m6if(mifip) 731 mifi_t *mifip; 732 { 733 struct mif6 *mifp = mif6table + *mifip; 734 mifi_t mifi; 735 struct ifnet *ifp; 736 struct in6_ifreq ifr; 737 int s; 738 739 if (*mifip >= nummifs) 740 return EINVAL; 741 if (mifp->m6_ifp == NULL) 742 return EINVAL; 743 744 s = splsoftnet(); 745 746 if (!(mifp->m6_flags & MIFF_REGISTER)) { 747 /* 748 * XXX: what if there is yet IPv4 multicast daemon 749 * using the interface? 750 */ 751 ifp = mifp->m6_ifp; 752 753 ifr.ifr_addr.sin6_family = AF_INET6; 754 ifr.ifr_addr.sin6_addr = in6addr_any; 755 (*ifp->if_ioctl)(ifp, SIOCDELMULTI, (caddr_t)&ifr); 756 } else { 757 if (reg_mif_num != (mifi_t)-1) { 758 if_detach(&multicast_register_if6); 759 reg_mif_num = (mifi_t)-1; 760 } 761 } 762 763 #ifdef notyet 764 bzero((caddr_t)qtable[*mifip], sizeof(qtable[*mifip])); 765 bzero((caddr_t)mifp->m6_tbf, sizeof(*(mifp->m6_tbf))); 766 #endif 767 bzero((caddr_t)mifp, sizeof (*mifp)); 768 769 /* Adjust nummifs down */ 770 for (mifi = nummifs; mifi > 0; mifi--) 771 if (mif6table[mifi - 1].m6_ifp) 772 break; 773 nummifs = mifi; 774 775 splx(s); 776 777 #ifdef MRT6DEBUG 778 if (mrt6debug) 779 log(LOG_DEBUG, "del_m6if %d, nummifs %d\n", *mifip, nummifs); 780 #endif 781 782 return 0; 783 } 784 785 /* 786 * Add an mfc entry 787 */ 788 static int 789 add_m6fc(mfccp) 790 struct mf6cctl *mfccp; 791 { 792 struct mf6c *rt; 793 u_long hash; 794 struct rtdetq *rte; 795 u_short nstl; 796 int s; 797 798 MF6CFIND(mfccp->mf6cc_origin.sin6_addr, 799 mfccp->mf6cc_mcastgrp.sin6_addr, rt); 800 801 /* If an entry already exists, just update the fields */ 802 if (rt) { 803 #ifdef MRT6DEBUG 804 if (mrt6debug & DEBUG_MFC) 805 log(LOG_DEBUG,"add_m6fc update o %s g %s p %x\n", 806 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 807 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 808 mfccp->mf6cc_parent); 809 #endif 810 811 s = splsoftnet(); 812 rt->mf6c_parent = mfccp->mf6cc_parent; 813 rt->mf6c_ifset = mfccp->mf6cc_ifset; 814 splx(s); 815 return 0; 816 } 817 818 /* 819 * Find the entry for which the upcall was made and update 820 */ 821 s = splsoftnet(); 822 hash = MF6CHASH(mfccp->mf6cc_origin.sin6_addr, 823 mfccp->mf6cc_mcastgrp.sin6_addr); 824 for (rt = mf6ctable[hash], nstl = 0; rt; rt = rt->mf6c_next) { 825 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 826 &mfccp->mf6cc_origin.sin6_addr) && 827 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 828 &mfccp->mf6cc_mcastgrp.sin6_addr) && 829 (rt->mf6c_stall != NULL)) { 830 831 if (nstl++) 832 log(LOG_ERR, 833 "add_m6fc: %s o %s g %s p %x dbx %p\n", 834 "multiple kernel entries", 835 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 836 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 837 mfccp->mf6cc_parent, rt->mf6c_stall); 838 839 #ifdef MRT6DEBUG 840 if (mrt6debug & DEBUG_MFC) 841 log(LOG_DEBUG, 842 "add_m6fc o %s g %s p %x dbg %x\n", 843 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 844 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 845 mfccp->mf6cc_parent, rt->mf6c_stall); 846 #endif 847 848 rt->mf6c_origin = mfccp->mf6cc_origin; 849 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 850 rt->mf6c_parent = mfccp->mf6cc_parent; 851 rt->mf6c_ifset = mfccp->mf6cc_ifset; 852 /* initialize pkt counters per src-grp */ 853 rt->mf6c_pkt_cnt = 0; 854 rt->mf6c_byte_cnt = 0; 855 rt->mf6c_wrong_if = 0; 856 857 rt->mf6c_expire = 0; /* Don't clean this guy up */ 858 n6expire[hash]--; 859 860 /* free packets Qed at the end of this entry */ 861 for (rte = rt->mf6c_stall; rte != NULL; ) { 862 struct rtdetq *n = rte->next; 863 if (rte->ifp) { 864 ip6_mdq(rte->m, rte->ifp, rt); 865 } 866 m_freem(rte->m); 867 #ifdef UPCALL_TIMING 868 collate(&(rte->t)); 869 #endif /* UPCALL_TIMING */ 870 free(rte, M_MRTABLE); 871 rte = n; 872 } 873 rt->mf6c_stall = NULL; 874 } 875 } 876 877 /* 878 * It is possible that an entry is being inserted without an upcall 879 */ 880 if (nstl == 0) { 881 #ifdef MRT6DEBUG 882 if (mrt6debug & DEBUG_MFC) 883 log(LOG_DEBUG, 884 "add_mfc no upcall h %d o %s g %s p %x\n", 885 hash, 886 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 887 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 888 mfccp->mf6cc_parent); 889 #endif 890 891 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 892 893 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 894 &mfccp->mf6cc_origin.sin6_addr)&& 895 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 896 &mfccp->mf6cc_mcastgrp.sin6_addr)) { 897 898 rt->mf6c_origin = mfccp->mf6cc_origin; 899 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 900 rt->mf6c_parent = mfccp->mf6cc_parent; 901 rt->mf6c_ifset = mfccp->mf6cc_ifset; 902 /* initialize pkt counters per src-grp */ 903 rt->mf6c_pkt_cnt = 0; 904 rt->mf6c_byte_cnt = 0; 905 rt->mf6c_wrong_if = 0; 906 907 if (rt->mf6c_expire) 908 n6expire[hash]--; 909 rt->mf6c_expire = 0; 910 } 911 } 912 if (rt == NULL) { 913 /* no upcall, so make a new entry */ 914 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE, 915 M_NOWAIT); 916 if (rt == NULL) { 917 splx(s); 918 return ENOBUFS; 919 } 920 921 /* insert new entry at head of hash chain */ 922 rt->mf6c_origin = mfccp->mf6cc_origin; 923 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 924 rt->mf6c_parent = mfccp->mf6cc_parent; 925 rt->mf6c_ifset = mfccp->mf6cc_ifset; 926 /* initialize pkt counters per src-grp */ 927 rt->mf6c_pkt_cnt = 0; 928 rt->mf6c_byte_cnt = 0; 929 rt->mf6c_wrong_if = 0; 930 rt->mf6c_expire = 0; 931 rt->mf6c_stall = NULL; 932 933 /* link into table */ 934 rt->mf6c_next = mf6ctable[hash]; 935 mf6ctable[hash] = rt; 936 } 937 } 938 splx(s); 939 return 0; 940 } 941 942 #ifdef UPCALL_TIMING 943 /* 944 * collect delay statistics on the upcalls 945 */ 946 static void 947 collate(t) 948 struct timeval *t; 949 { 950 u_long d; 951 struct timeval tp; 952 u_long delta; 953 954 GET_TIME(tp); 955 956 if (TV_LT(*t, tp)) 957 { 958 TV_DELTA(tp, *t, delta); 959 960 d = delta >> 10; 961 if (d > UPCALL_MAX) 962 d = UPCALL_MAX; 963 964 ++upcall_data[d]; 965 } 966 } 967 #endif /* UPCALL_TIMING */ 968 969 /* 970 * Delete an mfc entry 971 */ 972 static int 973 del_m6fc(mfccp) 974 struct mf6cctl *mfccp; 975 { 976 struct sockaddr_in6 origin; 977 struct sockaddr_in6 mcastgrp; 978 struct mf6c *rt; 979 struct mf6c **nptr; 980 u_long hash; 981 int s; 982 983 origin = mfccp->mf6cc_origin; 984 mcastgrp = mfccp->mf6cc_mcastgrp; 985 hash = MF6CHASH(origin.sin6_addr, mcastgrp.sin6_addr); 986 987 #ifdef MRT6DEBUG 988 if (mrt6debug & DEBUG_MFC) 989 log(LOG_DEBUG,"del_m6fc orig %s mcastgrp %s\n", 990 ip6_sprintf(&origin.sin6_addr), 991 ip6_sprintf(&mcastgrp.sin6_addr)); 992 #endif 993 994 s = splsoftnet(); 995 996 nptr = &mf6ctable[hash]; 997 while ((rt = *nptr) != NULL) { 998 if (IN6_ARE_ADDR_EQUAL(&origin.sin6_addr, 999 &rt->mf6c_origin.sin6_addr) && 1000 IN6_ARE_ADDR_EQUAL(&mcastgrp.sin6_addr, 1001 &rt->mf6c_mcastgrp.sin6_addr) && 1002 rt->mf6c_stall == NULL) 1003 break; 1004 1005 nptr = &rt->mf6c_next; 1006 } 1007 if (rt == NULL) { 1008 splx(s); 1009 return EADDRNOTAVAIL; 1010 } 1011 1012 *nptr = rt->mf6c_next; 1013 free(rt, M_MRTABLE); 1014 1015 splx(s); 1016 1017 return 0; 1018 } 1019 1020 static int 1021 socket_send(s, mm, src) 1022 struct socket *s; 1023 struct mbuf *mm; 1024 struct sockaddr_in6 *src; 1025 { 1026 if (s) { 1027 if (sbappendaddr(&s->so_rcv, 1028 (struct sockaddr *)src, 1029 mm, (struct mbuf *)0) != 0) { 1030 sorwakeup(s); 1031 return 0; 1032 } 1033 } 1034 m_freem(mm); 1035 return -1; 1036 } 1037 1038 /* 1039 * IPv6 multicast forwarding function. This function assumes that the packet 1040 * pointed to by "ip6" has arrived on (or is about to be sent to) the interface 1041 * pointed to by "ifp", and the packet is to be relayed to other networks 1042 * that have members of the packet's destination IPv6 multicast group. 1043 * 1044 * The packet is returned unscathed to the caller, unless it is 1045 * erroneous, in which case a non-zero return value tells the caller to 1046 * discard it. 1047 */ 1048 1049 int 1050 ip6_mforward(ip6, ifp, m) 1051 struct ip6_hdr *ip6; 1052 struct ifnet *ifp; 1053 struct mbuf *m; 1054 { 1055 struct mf6c *rt; 1056 struct mif6 *mifp; 1057 struct mbuf *mm; 1058 int s; 1059 mifi_t mifi; 1060 struct sockaddr_in6 sin6; 1061 1062 #ifdef MRT6DEBUG 1063 if (mrt6debug & DEBUG_FORWARD) 1064 log(LOG_DEBUG, "ip6_mforward: src %s, dst %s, ifindex %d\n", 1065 ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst), 1066 ifp->if_index); 1067 #endif 1068 1069 /* 1070 * Don't forward a packet with Hop limit of zero or one, 1071 * or a packet destined to a local-only group. 1072 */ 1073 if (ip6->ip6_hlim <= 1 || IN6_IS_ADDR_MC_NODELOCAL(&ip6->ip6_dst) || 1074 IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst)) 1075 return 0; 1076 ip6->ip6_hlim--; 1077 1078 /* 1079 * Source address check: do not forward packets with unspecified 1080 * source. It was discussed in July 2000, on ipngwg mailing list. 1081 * This is rather more serious than unicast cases, because some 1082 * MLD packets can be sent with the unspecified source address 1083 * (although such packets must normally set 1 to the hop limit field). 1084 */ 1085 if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) { 1086 ip6stat.ip6s_cantforward++; 1087 if (ip6_log_time + ip6_log_interval < time.tv_sec) { 1088 ip6_log_time = time.tv_sec; 1089 log(LOG_DEBUG, 1090 "cannot forward " 1091 "from %s to %s nxt %d received on %s\n", 1092 ip6_sprintf(&ip6->ip6_src), 1093 ip6_sprintf(&ip6->ip6_dst), 1094 ip6->ip6_nxt, 1095 m->m_pkthdr.rcvif ? 1096 if_name(m->m_pkthdr.rcvif) : "?"); 1097 } 1098 return 0; 1099 } 1100 1101 /* 1102 * Determine forwarding mifs from the forwarding cache table 1103 */ 1104 s = splsoftnet(); 1105 MF6CFIND(ip6->ip6_src, ip6->ip6_dst, rt); 1106 1107 /* Entry exists, so forward if necessary */ 1108 if (rt) { 1109 splx(s); 1110 return (ip6_mdq(m, ifp, rt)); 1111 } else { 1112 /* 1113 * If we don't have a route for packet's origin, 1114 * Make a copy of the packet & 1115 * send message to routing daemon 1116 */ 1117 1118 struct mbuf *mb0; 1119 struct rtdetq *rte; 1120 u_long hash; 1121 /* int i, npkts;*/ 1122 #ifdef UPCALL_TIMING 1123 struct timeval tp; 1124 1125 GET_TIME(tp); 1126 #endif /* UPCALL_TIMING */ 1127 1128 mrt6stat.mrt6s_no_route++; 1129 #ifdef MRT6DEBUG 1130 if (mrt6debug & (DEBUG_FORWARD | DEBUG_MFC)) 1131 log(LOG_DEBUG, "ip6_mforward: no rte s %s g %s\n", 1132 ip6_sprintf(&ip6->ip6_src), 1133 ip6_sprintf(&ip6->ip6_dst)); 1134 #endif 1135 1136 /* 1137 * Allocate mbufs early so that we don't do extra work if we 1138 * are just going to fail anyway. 1139 */ 1140 rte = (struct rtdetq *)malloc(sizeof(*rte), M_MRTABLE, 1141 M_NOWAIT); 1142 if (rte == NULL) { 1143 splx(s); 1144 return ENOBUFS; 1145 } 1146 mb0 = m_copy(m, 0, M_COPYALL); 1147 /* 1148 * Pullup packet header if needed before storing it, 1149 * as other references may modify it in the meantime. 1150 */ 1151 if (mb0 && 1152 (M_READONLY(mb0) || mb0->m_len < sizeof(struct ip6_hdr))) 1153 mb0 = m_pullup(mb0, sizeof(struct ip6_hdr)); 1154 if (mb0 == NULL) { 1155 free(rte, M_MRTABLE); 1156 splx(s); 1157 return ENOBUFS; 1158 } 1159 1160 /* is there an upcall waiting for this packet? */ 1161 hash = MF6CHASH(ip6->ip6_src, ip6->ip6_dst); 1162 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 1163 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, 1164 &rt->mf6c_origin.sin6_addr) && 1165 IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, 1166 &rt->mf6c_mcastgrp.sin6_addr) && 1167 (rt->mf6c_stall != NULL)) 1168 break; 1169 } 1170 1171 if (rt == NULL) { 1172 struct mrt6msg *im; 1173 struct omrt6msg *oim; 1174 1175 /* no upcall, so make a new entry */ 1176 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE, 1177 M_NOWAIT); 1178 if (rt == NULL) { 1179 free(rte, M_MRTABLE); 1180 m_freem(mb0); 1181 splx(s); 1182 return ENOBUFS; 1183 } 1184 /* 1185 * Make a copy of the header to send to the user 1186 * level process 1187 */ 1188 mm = m_copy(mb0, 0, sizeof(struct ip6_hdr)); 1189 1190 if (mm == NULL) { 1191 free(rte, M_MRTABLE); 1192 m_freem(mb0); 1193 free(rt, M_MRTABLE); 1194 splx(s); 1195 return ENOBUFS; 1196 } 1197 1198 /* 1199 * Send message to routing daemon 1200 */ 1201 (void)memset(&sin6, 0, sizeof(sin6)); 1202 sin6.sin6_len = sizeof(sin6); 1203 sin6.sin6_family = AF_INET6; 1204 sin6.sin6_addr = ip6->ip6_src; 1205 1206 im = NULL; 1207 oim = NULL; 1208 switch (ip6_mrouter_ver) { 1209 case MRT6_OINIT: 1210 oim = mtod(mm, struct omrt6msg *); 1211 oim->im6_msgtype = MRT6MSG_NOCACHE; 1212 oim->im6_mbz = 0; 1213 break; 1214 case MRT6_INIT: 1215 im = mtod(mm, struct mrt6msg *); 1216 im->im6_msgtype = MRT6MSG_NOCACHE; 1217 im->im6_mbz = 0; 1218 break; 1219 default: 1220 free(rte, M_MRTABLE); 1221 m_freem(mb0); 1222 free(rt, M_MRTABLE); 1223 splx(s); 1224 return EINVAL; 1225 } 1226 1227 #ifdef MRT6DEBUG 1228 if (mrt6debug & DEBUG_FORWARD) 1229 log(LOG_DEBUG, 1230 "getting the iif info in the kernel\n"); 1231 #endif 1232 1233 for (mifp = mif6table, mifi = 0; 1234 mifi < nummifs && mifp->m6_ifp != ifp; 1235 mifp++, mifi++) 1236 ; 1237 1238 switch (ip6_mrouter_ver) { 1239 case MRT6_OINIT: 1240 oim->im6_mif = mifi; 1241 break; 1242 case MRT6_INIT: 1243 im->im6_mif = mifi; 1244 break; 1245 } 1246 1247 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1248 log(LOG_WARNING, "ip6_mforward: ip6_mrouter " 1249 "socket queue full\n"); 1250 mrt6stat.mrt6s_upq_sockfull++; 1251 free(rte, M_MRTABLE); 1252 m_freem(mb0); 1253 free(rt, M_MRTABLE); 1254 splx(s); 1255 return ENOBUFS; 1256 } 1257 1258 mrt6stat.mrt6s_upcalls++; 1259 1260 /* insert new entry at head of hash chain */ 1261 bzero(rt, sizeof(*rt)); 1262 rt->mf6c_origin.sin6_family = AF_INET6; 1263 rt->mf6c_origin.sin6_len = sizeof(struct sockaddr_in6); 1264 rt->mf6c_origin.sin6_addr = ip6->ip6_src; 1265 rt->mf6c_mcastgrp.sin6_family = AF_INET6; 1266 rt->mf6c_mcastgrp.sin6_len = sizeof(struct sockaddr_in6); 1267 rt->mf6c_mcastgrp.sin6_addr = ip6->ip6_dst; 1268 rt->mf6c_expire = UPCALL_EXPIRE; 1269 n6expire[hash]++; 1270 rt->mf6c_parent = MF6C_INCOMPLETE_PARENT; 1271 1272 /* link into table */ 1273 rt->mf6c_next = mf6ctable[hash]; 1274 mf6ctable[hash] = rt; 1275 /* Add this entry to the end of the queue */ 1276 rt->mf6c_stall = rte; 1277 } else { 1278 /* determine if q has overflowed */ 1279 struct rtdetq **p; 1280 int npkts = 0; 1281 1282 for (p = &rt->mf6c_stall; *p != NULL; p = &(*p)->next) 1283 if (++npkts > MAX_UPQ6) { 1284 mrt6stat.mrt6s_upq_ovflw++; 1285 free(rte, M_MRTABLE); 1286 m_freem(mb0); 1287 splx(s); 1288 return 0; 1289 } 1290 1291 /* Add this entry to the end of the queue */ 1292 *p = rte; 1293 } 1294 1295 rte->next = NULL; 1296 rte->m = mb0; 1297 rte->ifp = ifp; 1298 #ifdef UPCALL_TIMING 1299 rte->t = tp; 1300 #endif /* UPCALL_TIMING */ 1301 1302 splx(s); 1303 1304 return 0; 1305 } 1306 } 1307 1308 /* 1309 * Clean up cache entries if upcalls are not serviced 1310 * Call from the Slow Timeout mechanism, every half second. 1311 */ 1312 static void 1313 expire_upcalls(unused) 1314 void *unused; 1315 { 1316 struct rtdetq *rte; 1317 struct mf6c *mfc, **nptr; 1318 int i; 1319 int s; 1320 1321 s = splsoftnet(); 1322 for (i = 0; i < MF6CTBLSIZ; i++) { 1323 if (n6expire[i] == 0) 1324 continue; 1325 nptr = &mf6ctable[i]; 1326 while ((mfc = *nptr) != NULL) { 1327 rte = mfc->mf6c_stall; 1328 /* 1329 * Skip real cache entries 1330 * Make sure it wasn't marked to not expire (shouldn't happen) 1331 * If it expires now 1332 */ 1333 if (rte != NULL && 1334 mfc->mf6c_expire != 0 && 1335 --mfc->mf6c_expire == 0) { 1336 #ifdef MRT6DEBUG 1337 if (mrt6debug & DEBUG_EXPIRE) 1338 log(LOG_DEBUG, "expire_upcalls: expiring (%s %s)\n", 1339 ip6_sprintf(&mfc->mf6c_origin.sin6_addr), 1340 ip6_sprintf(&mfc->mf6c_mcastgrp.sin6_addr)); 1341 #endif 1342 /* 1343 * drop all the packets 1344 * free the mbuf with the pkt, if, timing info 1345 */ 1346 do { 1347 struct rtdetq *n = rte->next; 1348 m_freem(rte->m); 1349 free(rte, M_MRTABLE); 1350 rte = n; 1351 } while (rte != NULL); 1352 mrt6stat.mrt6s_cache_cleanups++; 1353 n6expire[i]--; 1354 1355 *nptr = mfc->mf6c_next; 1356 free(mfc, M_MRTABLE); 1357 } else { 1358 nptr = &mfc->mf6c_next; 1359 } 1360 } 1361 } 1362 splx(s); 1363 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 1364 expire_upcalls, NULL); 1365 } 1366 1367 /* 1368 * Packet forwarding routine once entry in the cache is made 1369 */ 1370 static int 1371 ip6_mdq(m, ifp, rt) 1372 struct mbuf *m; 1373 struct ifnet *ifp; 1374 struct mf6c *rt; 1375 { 1376 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 1377 mifi_t mifi, iif; 1378 struct mif6 *mifp; 1379 int plen = m->m_pkthdr.len; 1380 struct in6_addr src0, dst0; /* copies for local work */ 1381 u_int32_t iszone, idzone, oszone, odzone; 1382 int error = 0; 1383 1384 /* 1385 * Macro to send packet on mif. Since RSVP packets don't get counted on 1386 * input, they shouldn't get counted on output, so statistics keeping is 1387 * separate. 1388 */ 1389 1390 #define MC6_SEND(ip6, mifp, m) do { \ 1391 if ((mifp)->m6_flags & MIFF_REGISTER) \ 1392 register_send((ip6), (mifp), (m)); \ 1393 else \ 1394 phyint_send((ip6), (mifp), (m)); \ 1395 } while (/*CONSTCOND*/ 0) 1396 1397 /* 1398 * Don't forward if it didn't arrive from the parent mif 1399 * for its origin. 1400 */ 1401 mifi = rt->mf6c_parent; 1402 if ((mifi >= nummifs) || (mif6table[mifi].m6_ifp != ifp)) { 1403 /* came in the wrong interface */ 1404 #ifdef MRT6DEBUG 1405 if (mrt6debug & DEBUG_FORWARD) 1406 log(LOG_DEBUG, 1407 "wrong if: ifid %d mifi %d mififid %x\n", 1408 ifp->if_index, mifi, 1409 mif6table[mifi].m6_ifp ? 1410 mif6table[mifi].m6_ifp->if_index : -1); 1411 #endif 1412 mrt6stat.mrt6s_wrong_if++; 1413 rt->mf6c_wrong_if++; 1414 /* 1415 * If we are doing PIM processing, and we are forwarding 1416 * packets on this interface, send a message to the 1417 * routing daemon. 1418 */ 1419 /* have to make sure this is a valid mif */ 1420 if (mifi < nummifs && mif6table[mifi].m6_ifp) 1421 if (pim6 && (m->m_flags & M_LOOP) == 0) { 1422 /* 1423 * Check the M_LOOP flag to avoid an 1424 * unnecessary PIM assert. 1425 * XXX: M_LOOP is an ad-hoc hack... 1426 */ 1427 struct sockaddr_in6 sin6; 1428 1429 struct mbuf *mm; 1430 struct mrt6msg *im; 1431 struct omrt6msg *oim; 1432 1433 mm = m_copy(m, 0, sizeof(struct ip6_hdr)); 1434 if (mm && 1435 (M_READONLY(mm) || 1436 mm->m_len < sizeof(struct ip6_hdr))) 1437 mm = m_pullup(mm, sizeof(struct ip6_hdr)); 1438 if (mm == NULL) 1439 return ENOBUFS; 1440 1441 oim = NULL; 1442 im = NULL; 1443 switch (ip6_mrouter_ver) { 1444 case MRT6_OINIT: 1445 oim = mtod(mm, struct omrt6msg *); 1446 oim->im6_msgtype = MRT6MSG_WRONGMIF; 1447 oim->im6_mbz = 0; 1448 break; 1449 case MRT6_INIT: 1450 im = mtod(mm, struct mrt6msg *); 1451 im->im6_msgtype = MRT6MSG_WRONGMIF; 1452 im->im6_mbz = 0; 1453 break; 1454 default: 1455 m_freem(mm); 1456 return EINVAL; 1457 } 1458 1459 for (mifp = mif6table, iif = 0; 1460 iif < nummifs && mifp && 1461 mifp->m6_ifp != ifp; 1462 mifp++, iif++) 1463 ; 1464 1465 (void)memset(&sin6, 0, sizeof(sin6)); 1466 sin6.sin6_len = sizeof(sin6); 1467 sin6.sin6_family = AF_INET6; 1468 switch (ip6_mrouter_ver) { 1469 case MRT6_OINIT: 1470 oim->im6_mif = iif; 1471 sin6.sin6_addr = oim->im6_src; 1472 break; 1473 case MRT6_INIT: 1474 im->im6_mif = iif; 1475 sin6.sin6_addr = im->im6_src; 1476 break; 1477 } 1478 1479 mrt6stat.mrt6s_upcalls++; 1480 1481 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1482 #ifdef MRT6DEBUG 1483 if (mrt6debug) 1484 log(LOG_WARNING, "mdq, ip6_mrouter socket queue full\n"); 1485 #endif 1486 ++mrt6stat.mrt6s_upq_sockfull; 1487 return ENOBUFS; 1488 } /* if socket Q full */ 1489 } /* if PIM */ 1490 return 0; 1491 } /* if wrong iif */ 1492 1493 /* If I sourced this packet, it counts as output, else it was input. */ 1494 if (m->m_pkthdr.rcvif == NULL) { 1495 /* XXX: is rcvif really NULL when output?? */ 1496 mif6table[mifi].m6_pkt_out++; 1497 mif6table[mifi].m6_bytes_out += plen; 1498 } else { 1499 mif6table[mifi].m6_pkt_in++; 1500 mif6table[mifi].m6_bytes_in += plen; 1501 } 1502 rt->mf6c_pkt_cnt++; 1503 rt->mf6c_byte_cnt += plen; 1504 1505 /* 1506 * For each mif, forward a copy of the packet if there are group 1507 * members downstream on the interface. 1508 */ 1509 src0 = ip6->ip6_src; 1510 dst0 = ip6->ip6_dst; 1511 if ((error = in6_setscope(&src0, ifp, &iszone)) != 0 || 1512 (error = in6_setscope(&dst0, ifp, &idzone)) != 0) { 1513 ip6stat.ip6s_badscope++; 1514 return (error); 1515 } 1516 for (mifp = mif6table, mifi = 0; mifi < nummifs; mifp++, mifi++) 1517 if (IF_ISSET(mifi, &rt->mf6c_ifset)) { 1518 if (mif6table[mifi].m6_ifp == NULL) 1519 continue; 1520 /* 1521 * check if the outgoing packet is going to break 1522 * a scope boundary. 1523 * XXX For packets through PIM register tunnel 1524 * interface, we believe a routing daemon. 1525 */ 1526 if ((mif6table[rt->mf6c_parent].m6_flags & 1527 MIFF_REGISTER) == 0 && 1528 (mif6table[mifi].m6_flags & MIFF_REGISTER) == 0) { 1529 if (in6_setscope(&src0, mif6table[mifi].m6_ifp, 1530 &oszone) || 1531 in6_setscope(&dst0, mif6table[mifi].m6_ifp, 1532 &odzone) || 1533 iszone != oszone || idzone != odzone) { 1534 ip6stat.ip6s_badscope++; 1535 continue; 1536 } 1537 } 1538 1539 mifp->m6_pkt_out++; 1540 mifp->m6_bytes_out += plen; 1541 MC6_SEND(ip6, mifp, m); 1542 } 1543 return 0; 1544 } 1545 1546 static void 1547 phyint_send(ip6, mifp, m) 1548 struct ip6_hdr *ip6; 1549 struct mif6 *mifp; 1550 struct mbuf *m; 1551 { 1552 struct mbuf *mb_copy; 1553 struct ifnet *ifp = mifp->m6_ifp; 1554 int error = 0; 1555 int s = splsoftnet(); 1556 static struct route_in6 ro; 1557 struct in6_multi *in6m; 1558 struct sockaddr_in6 *dst6; 1559 u_long linkmtu; 1560 1561 /* 1562 * Make a new reference to the packet; make sure that 1563 * the IPv6 header is actually copied, not just referenced, 1564 * so that ip6_output() only scribbles on the copy. 1565 */ 1566 mb_copy = m_copy(m, 0, M_COPYALL); 1567 if (mb_copy && 1568 (M_READONLY(mb_copy) || mb_copy->m_len < sizeof(struct ip6_hdr))) 1569 mb_copy = m_pullup(mb_copy, sizeof(struct ip6_hdr)); 1570 if (mb_copy == NULL) { 1571 splx(s); 1572 return; 1573 } 1574 /* set MCAST flag to the outgoing packet */ 1575 mb_copy->m_flags |= M_MCAST; 1576 1577 /* 1578 * If we sourced the packet, call ip6_output since we may devide 1579 * the packet into fragments when the packet is too big for the 1580 * outgoing interface. 1581 * Otherwise, we can simply send the packet to the interface 1582 * sending queue. 1583 */ 1584 if (m->m_pkthdr.rcvif == NULL) { 1585 struct ip6_moptions im6o; 1586 1587 im6o.im6o_multicast_ifp = ifp; 1588 /* XXX: ip6_output will override ip6->ip6_hlim */ 1589 im6o.im6o_multicast_hlim = ip6->ip6_hlim; 1590 im6o.im6o_multicast_loop = 1; 1591 error = ip6_output(mb_copy, NULL, &ro, IPV6_FORWARDING, 1592 &im6o, (struct socket *)0, NULL); 1593 1594 #ifdef MRT6DEBUG 1595 if (mrt6debug & DEBUG_XMIT) 1596 log(LOG_DEBUG, "phyint_send on mif %d err %d\n", 1597 mifp - mif6table, error); 1598 #endif 1599 splx(s); 1600 return; 1601 } 1602 1603 /* 1604 * If we belong to the destination multicast group 1605 * on the outgoing interface, loop back a copy. 1606 */ 1607 dst6 = (struct sockaddr_in6 *)&ro.ro_dst; 1608 IN6_LOOKUP_MULTI(ip6->ip6_dst, ifp, in6m); 1609 if (in6m != NULL) { 1610 dst6->sin6_len = sizeof(struct sockaddr_in6); 1611 dst6->sin6_family = AF_INET6; 1612 dst6->sin6_addr = ip6->ip6_dst; 1613 ip6_mloopback(ifp, m, (struct sockaddr_in6 *)&ro.ro_dst); 1614 } 1615 /* 1616 * Put the packet into the sending queue of the outgoing interface 1617 * if it would fit in the MTU of the interface. 1618 */ 1619 linkmtu = IN6_LINKMTU(ifp); 1620 if (mb_copy->m_pkthdr.len <= linkmtu || linkmtu < IPV6_MMTU) { 1621 dst6->sin6_len = sizeof(struct sockaddr_in6); 1622 dst6->sin6_family = AF_INET6; 1623 dst6->sin6_addr = ip6->ip6_dst; 1624 /* 1625 * We just call if_output instead of nd6_output here, since 1626 * we need no ND for a multicast forwarded packet...right? 1627 */ 1628 error = (*ifp->if_output)(ifp, mb_copy, 1629 (struct sockaddr *)&ro.ro_dst, NULL); 1630 #ifdef MRT6DEBUG 1631 if (mrt6debug & DEBUG_XMIT) 1632 log(LOG_DEBUG, "phyint_send on mif %d err %d\n", 1633 mifp - mif6table, error); 1634 #endif 1635 } else { 1636 #ifdef MULTICAST_PMTUD 1637 icmp6_error(mb_copy, ICMP6_PACKET_TOO_BIG, 0, linkmtu); 1638 #else 1639 #ifdef MRT6DEBUG 1640 if (mrt6debug & DEBUG_XMIT) 1641 log(LOG_DEBUG, 1642 "phyint_send: packet too big on %s o %s g %s" 1643 " size %d(discarded)\n", 1644 if_name(ifp), 1645 ip6_sprintf(&ip6->ip6_src), 1646 ip6_sprintf(&ip6->ip6_dst), 1647 mb_copy->m_pkthdr.len); 1648 #endif /* MRT6DEBUG */ 1649 m_freem(mb_copy); /* simply discard the packet */ 1650 #endif 1651 } 1652 1653 splx(s); 1654 } 1655 1656 static int 1657 register_send(ip6, mif, m) 1658 struct ip6_hdr *ip6; 1659 struct mif6 *mif; 1660 struct mbuf *m; 1661 { 1662 struct mbuf *mm; 1663 int i, len = m->m_pkthdr.len; 1664 struct sockaddr_in6 sin6; 1665 struct mrt6msg *im6; 1666 1667 #ifdef MRT6DEBUG 1668 if (mrt6debug) 1669 log(LOG_DEBUG, "** IPv6 register_send **\n src %s dst %s\n", 1670 ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst)); 1671 #endif 1672 ++pim6stat.pim6s_snd_registers; 1673 1674 /* Make a copy of the packet to send to the user level process */ 1675 MGETHDR(mm, M_DONTWAIT, MT_HEADER); 1676 if (mm == NULL) 1677 return ENOBUFS; 1678 mm->m_data += max_linkhdr; 1679 mm->m_len = sizeof(struct ip6_hdr); 1680 1681 if ((mm->m_next = m_copy(m, 0, M_COPYALL)) == NULL) { 1682 m_freem(mm); 1683 return ENOBUFS; 1684 } 1685 i = MHLEN - M_LEADINGSPACE(mm); 1686 if (i > len) 1687 i = len; 1688 mm = m_pullup(mm, i); 1689 if (mm == NULL) 1690 return ENOBUFS; 1691 /* TODO: check it! */ 1692 mm->m_pkthdr.len = len + sizeof(struct ip6_hdr); 1693 1694 /* 1695 * Send message to routing daemon 1696 */ 1697 (void)memset(&sin6, 0, sizeof(sin6)); 1698 sin6.sin6_len = sizeof(sin6); 1699 sin6.sin6_family = AF_INET6; 1700 sin6.sin6_addr = ip6->ip6_src; 1701 1702 im6 = mtod(mm, struct mrt6msg *); 1703 im6->im6_msgtype = MRT6MSG_WHOLEPKT; 1704 im6->im6_mbz = 0; 1705 1706 im6->im6_mif = mif - mif6table; 1707 1708 /* iif info is not given for reg. encap.n */ 1709 mrt6stat.mrt6s_upcalls++; 1710 1711 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1712 #ifdef MRT6DEBUG 1713 if (mrt6debug) 1714 log(LOG_WARNING, 1715 "register_send: ip6_mrouter socket queue full\n"); 1716 #endif 1717 ++mrt6stat.mrt6s_upq_sockfull; 1718 return ENOBUFS; 1719 } 1720 return 0; 1721 } 1722 1723 /* 1724 * PIM sparse mode hook 1725 * Receives the pim control messages, and passes them up to the listening 1726 * socket, using rip6_input. 1727 * The only message processed is the REGISTER pim message; the pim header 1728 * is stripped off, and the inner packet is passed to register_mforward. 1729 */ 1730 int 1731 pim6_input(mp, offp, proto) 1732 struct mbuf **mp; 1733 int *offp, proto; 1734 { 1735 struct pim *pim; /* pointer to a pim struct */ 1736 struct ip6_hdr *ip6; 1737 int pimlen; 1738 struct mbuf *m = *mp; 1739 int minlen; 1740 int off = *offp; 1741 1742 ++pim6stat.pim6s_rcv_total; 1743 1744 ip6 = mtod(m, struct ip6_hdr *); 1745 pimlen = m->m_pkthdr.len - *offp; 1746 1747 /* 1748 * Validate lengths 1749 */ 1750 if (pimlen < PIM_MINLEN) { 1751 ++pim6stat.pim6s_rcv_tooshort; 1752 #ifdef MRT6DEBUG 1753 if (mrt6debug & DEBUG_PIM) 1754 log(LOG_DEBUG,"pim6_input: PIM packet too short\n"); 1755 #endif 1756 m_freem(m); 1757 return (IPPROTO_DONE); 1758 } 1759 1760 /* 1761 * if the packet is at least as big as a REGISTER, go ahead 1762 * and grab the PIM REGISTER header size, to avoid another 1763 * possible m_pullup() later. 1764 * 1765 * PIM_MINLEN == pimhdr + u_int32 == 8 1766 * PIM6_REG_MINLEN == pimhdr + reghdr + eip6hdr == 4 + 4 + 40 1767 */ 1768 minlen = (pimlen >= PIM6_REG_MINLEN) ? PIM6_REG_MINLEN : PIM_MINLEN; 1769 1770 /* 1771 * Make sure that the IP6 and PIM headers in contiguous memory, and 1772 * possibly the PIM REGISTER header 1773 */ 1774 IP6_EXTHDR_GET(pim, struct pim *, m, off, minlen); 1775 if (pim == NULL) { 1776 pim6stat.pim6s_rcv_tooshort++; 1777 return IPPROTO_DONE; 1778 } 1779 1780 /* PIM version check */ 1781 if (pim->pim_ver != PIM_VERSION) { 1782 ++pim6stat.pim6s_rcv_badversion; 1783 #ifdef MRT6DEBUG 1784 log(LOG_ERR, 1785 "pim6_input: incorrect version %d, expecting %d\n", 1786 pim->pim_ver, PIM_VERSION); 1787 #endif 1788 m_freem(m); 1789 return (IPPROTO_DONE); 1790 } 1791 1792 #define PIM6_CHECKSUM 1793 #ifdef PIM6_CHECKSUM 1794 { 1795 int cksumlen; 1796 1797 /* 1798 * Validate checksum. 1799 * If PIM REGISTER, exclude the data packet 1800 */ 1801 if (pim->pim_type == PIM_REGISTER) 1802 cksumlen = PIM_MINLEN; 1803 else 1804 cksumlen = pimlen; 1805 1806 if (in6_cksum(m, IPPROTO_PIM, off, cksumlen)) { 1807 ++pim6stat.pim6s_rcv_badsum; 1808 #ifdef MRT6DEBUG 1809 if (mrt6debug & DEBUG_PIM) 1810 log(LOG_DEBUG, 1811 "pim6_input: invalid checksum\n"); 1812 #endif 1813 m_freem(m); 1814 return (IPPROTO_DONE); 1815 } 1816 } 1817 #endif /* PIM_CHECKSUM */ 1818 1819 if (pim->pim_type == PIM_REGISTER) { 1820 /* 1821 * since this is a REGISTER, we'll make a copy of the register 1822 * headers ip6+pim+u_int32_t+encap_ip6, to be passed up to the 1823 * routing daemon. 1824 */ 1825 static struct sockaddr_in6 dst = { sizeof(dst), AF_INET6 }; 1826 1827 struct mbuf *mcp; 1828 struct ip6_hdr *eip6; 1829 u_int32_t *reghdr; 1830 1831 ++pim6stat.pim6s_rcv_registers; 1832 1833 if ((reg_mif_num >= nummifs) || (reg_mif_num == (mifi_t) -1)) { 1834 #ifdef MRT6DEBUG 1835 if (mrt6debug & DEBUG_PIM) 1836 log(LOG_DEBUG, 1837 "pim6_input: register mif not set: %d\n", 1838 reg_mif_num); 1839 #endif 1840 m_freem(m); 1841 return (IPPROTO_DONE); 1842 } 1843 1844 reghdr = (u_int32_t *)(pim + 1); 1845 1846 if ((ntohl(*reghdr) & PIM_NULL_REGISTER)) 1847 goto pim6_input_to_daemon; 1848 1849 /* 1850 * Validate length 1851 */ 1852 if (pimlen < PIM6_REG_MINLEN) { 1853 ++pim6stat.pim6s_rcv_tooshort; 1854 ++pim6stat.pim6s_rcv_badregisters; 1855 #ifdef MRT6DEBUG 1856 log(LOG_ERR, 1857 "pim6_input: register packet size too " 1858 "small %d from %s\n", 1859 pimlen, ip6_sprintf(&ip6->ip6_src)); 1860 #endif 1861 m_freem(m); 1862 return (IPPROTO_DONE); 1863 } 1864 1865 eip6 = (struct ip6_hdr *) (reghdr + 1); 1866 #ifdef MRT6DEBUG 1867 if (mrt6debug & DEBUG_PIM) 1868 log(LOG_DEBUG, 1869 "pim6_input[register], eip6: %s -> %s, " 1870 "eip6 plen %d\n", 1871 ip6_sprintf(&eip6->ip6_src), 1872 ip6_sprintf(&eip6->ip6_dst), 1873 ntohs(eip6->ip6_plen)); 1874 #endif 1875 1876 /* verify the version number of the inner packet */ 1877 if ((eip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) { 1878 ++pim6stat.pim6s_rcv_badregisters; 1879 #ifdef MRT6DEBUG 1880 log(LOG_DEBUG, "pim6_input: invalid IP version (%d) " 1881 "of the inner packet\n", 1882 (eip6->ip6_vfc & IPV6_VERSION)); 1883 #endif 1884 m_freem(m); 1885 return (IPPROTO_NONE); 1886 } 1887 1888 /* verify the inner packet is destined to a mcast group */ 1889 if (!IN6_IS_ADDR_MULTICAST(&eip6->ip6_dst)) { 1890 ++pim6stat.pim6s_rcv_badregisters; 1891 #ifdef MRT6DEBUG 1892 if (mrt6debug & DEBUG_PIM) 1893 log(LOG_DEBUG, 1894 "pim6_input: inner packet of register " 1895 "is not multicast %s\n", 1896 ip6_sprintf(&eip6->ip6_dst)); 1897 #endif 1898 m_freem(m); 1899 return (IPPROTO_DONE); 1900 } 1901 1902 /* 1903 * make a copy of the whole header to pass to the daemon later. 1904 */ 1905 mcp = m_copy(m, 0, off + PIM6_REG_MINLEN); 1906 if (mcp == NULL) { 1907 #ifdef MRT6DEBUG 1908 log(LOG_ERR, 1909 "pim6_input: pim register: " 1910 "could not copy register head\n"); 1911 #endif 1912 m_freem(m); 1913 return (IPPROTO_DONE); 1914 } 1915 1916 /* 1917 * forward the inner ip6 packet; point m_data at the inner ip6. 1918 */ 1919 m_adj(m, off + PIM_MINLEN); 1920 #ifdef MRT6DEBUG 1921 if (mrt6debug & DEBUG_PIM) { 1922 log(LOG_DEBUG, 1923 "pim6_input: forwarding decapsulated register: " 1924 "src %s, dst %s, mif %d\n", 1925 ip6_sprintf(&eip6->ip6_src), 1926 ip6_sprintf(&eip6->ip6_dst), 1927 reg_mif_num); 1928 } 1929 #endif 1930 1931 looutput(mif6table[reg_mif_num].m6_ifp, m, 1932 (struct sockaddr *) &dst, 1933 (struct rtentry *) NULL); 1934 1935 /* prepare the register head to send to the mrouting daemon */ 1936 m = mcp; 1937 } 1938 1939 /* 1940 * Pass the PIM message up to the daemon; if it is a register message 1941 * pass the 'head' only up to the daemon. This includes the 1942 * encapsulator ip6 header, pim header, register header and the 1943 * encapsulated ip6 header. 1944 */ 1945 pim6_input_to_daemon: 1946 rip6_input(&m, offp, proto); 1947 return (IPPROTO_DONE); 1948 } 1949 1950 SYSCTL_SETUP(sysctl_net_inet6_pim6_setup, "sysctl net.inet6.pim6 subtree setup") 1951 { 1952 sysctl_createv(clog, 0, NULL, NULL, 1953 CTLFLAG_PERMANENT, 1954 CTLTYPE_NODE, "net", NULL, 1955 NULL, 0, NULL, 0, 1956 CTL_NET, CTL_EOL); 1957 sysctl_createv(clog, 0, NULL, NULL, 1958 CTLFLAG_PERMANENT, 1959 CTLTYPE_NODE, "inet6", NULL, 1960 NULL, 0, NULL, 0, 1961 CTL_NET, PF_INET6, CTL_EOL); 1962 sysctl_createv(clog, 0, NULL, NULL, 1963 CTLFLAG_PERMANENT, 1964 CTLTYPE_NODE, "pim6", 1965 SYSCTL_DESCR("PIMv6 settings"), 1966 NULL, 0, NULL, 0, 1967 CTL_NET, PF_INET6, IPPROTO_PIM, CTL_EOL); 1968 1969 sysctl_createv(clog, 0, NULL, NULL, 1970 CTLFLAG_PERMANENT, 1971 CTLTYPE_STRUCT, "stats", 1972 SYSCTL_DESCR("PIMv6 statistics"), 1973 NULL, 0, &pim6stat, sizeof(pim6stat), 1974 CTL_NET, PF_INET6, IPPROTO_PIM, PIM6CTL_STATS, 1975 CTL_EOL); 1976 } 1977