1 /* $NetBSD: ip6_mroute.c,v 1.72 2006/06/07 22:34:03 kardel 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 1.72 2006/06/07 22:34:03 kardel 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 #include <netinet/icmp6.h> 147 148 #include <netinet/ip6.h> 149 #include <netinet6/ip6_var.h> 150 #include <netinet6/ip6_mroute.h> 151 #include <netinet6/scope6_var.h> 152 #include <netinet6/pim6.h> 153 #include <netinet6/pim6_var.h> 154 #include <netinet6/nd6.h> 155 156 #include <net/net_osdep.h> 157 158 static int ip6_mdq __P((struct mbuf *, struct ifnet *, struct mf6c *)); 159 static void phyint_send __P((struct ip6_hdr *, struct mif6 *, struct mbuf *)); 160 161 static int set_pim6 __P((int *)); 162 static int get_pim6 __P((struct mbuf *)); 163 static int socket_send __P((struct socket *, struct mbuf *, 164 struct sockaddr_in6 *)); 165 static int register_send __P((struct ip6_hdr *, struct mif6 *, struct mbuf *)); 166 167 /* 168 * Globals. All but ip6_mrouter, ip6_mrtproto and mrt6stat could be static, 169 * except for netstat or debugging purposes. 170 */ 171 struct socket *ip6_mrouter = NULL; 172 int ip6_mrouter_ver = 0; 173 int ip6_mrtproto = IPPROTO_PIM; /* for netstat only */ 174 struct mrt6stat mrt6stat; 175 176 #define NO_RTE_FOUND 0x1 177 #define RTE_FOUND 0x2 178 179 struct mf6c *mf6ctable[MF6CTBLSIZ]; 180 u_char n6expire[MF6CTBLSIZ]; 181 struct mif6 mif6table[MAXMIFS]; 182 #ifdef MRT6DEBUG 183 u_int mrt6debug = 0; /* debug level */ 184 #define DEBUG_MFC 0x02 185 #define DEBUG_FORWARD 0x04 186 #define DEBUG_EXPIRE 0x08 187 #define DEBUG_XMIT 0x10 188 #define DEBUG_REG 0x20 189 #define DEBUG_PIM 0x40 190 #endif 191 192 static void expire_upcalls __P((void *)); 193 #define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */ 194 #define UPCALL_EXPIRE 6 /* number of timeouts */ 195 196 #ifdef INET 197 #ifdef MROUTING 198 extern struct socket *ip_mrouter; 199 #endif 200 #endif 201 202 /* 203 * 'Interfaces' associated with decapsulator (so we can tell 204 * packets that went through it from ones that get reflected 205 * by a broken gateway). These interfaces are never linked into 206 * the system ifnet list & no routes point to them. I.e., packets 207 * can't be sent this way. They only exist as a placeholder for 208 * multicast source verification. 209 */ 210 struct ifnet multicast_register_if6; 211 212 #define ENCAP_HOPS 64 213 214 /* 215 * Private variables. 216 */ 217 static mifi_t nummifs = 0; 218 static mifi_t reg_mif_num = (mifi_t)-1; 219 220 struct pim6stat pim6stat; 221 static int pim6; 222 223 /* 224 * Hash function for a source, group entry 225 */ 226 #define MF6CHASH(a, g) MF6CHASHMOD((a).s6_addr32[0] ^ (a).s6_addr32[1] ^ \ 227 (a).s6_addr32[2] ^ (a).s6_addr32[3] ^ \ 228 (g).s6_addr32[0] ^ (g).s6_addr32[1] ^ \ 229 (g).s6_addr32[2] ^ (g).s6_addr32[3]) 230 231 /* 232 * Find a route for a given origin IPv6 address and Multicast group address. 233 * Quality of service parameter to be added in the future!!! 234 */ 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 */ 258 #define TV_DELTA(a, b, delta) do { \ 259 int xxs; \ 260 \ 261 delta = (a).tv_usec - (b).tv_usec; \ 262 if ((xxs = (a).tv_sec - (b).tv_sec)) { \ 263 switch (xxs) { \ 264 case 2: \ 265 delta += 1000000; \ 266 /* FALLTHROUGH */ \ 267 case 1: \ 268 delta += 1000000; \ 269 break; \ 270 default: \ 271 delta += (1000000 * xxs); \ 272 } \ 273 } \ 274 } while (/*CONSTCOND*/ 0) 275 276 #define TV_LT(a, b) (((a).tv_usec < (b).tv_usec && \ 277 (a).tv_sec <= (b).tv_sec) || (a).tv_sec < (b).tv_sec) 278 279 #ifdef UPCALL_TIMING 280 #define UPCALL_MAX 50 281 u_long upcall_data[UPCALL_MAX + 1]; 282 static void collate(); 283 #endif /* UPCALL_TIMING */ 284 285 static int get_sg_cnt __P((struct sioc_sg_req6 *)); 286 static int get_mif6_cnt __P((struct sioc_mif_req6 *)); 287 static int ip6_mrouter_init __P((struct socket *, int, int)); 288 static int add_m6if __P((struct mif6ctl *)); 289 static int del_m6if __P((mifi_t *)); 290 static int add_m6fc __P((struct mf6cctl *)); 291 static int del_m6fc __P((struct mf6cctl *)); 292 293 static struct callout expire_upcalls_ch = CALLOUT_INITIALIZER; 294 295 /* 296 * Handle MRT setsockopt commands to modify the multicast routing tables. 297 */ 298 int 299 ip6_mrouter_set(cmd, so, m) 300 int cmd; 301 struct socket *so; 302 struct mbuf *m; 303 { 304 if (cmd != MRT6_INIT && so != ip6_mrouter) 305 return (EACCES); 306 307 switch (cmd) { 308 #ifdef MRT6_OINIT 309 case MRT6_OINIT: 310 #endif 311 case MRT6_INIT: 312 if (m == NULL || m->m_len < sizeof(int)) 313 return (EINVAL); 314 return (ip6_mrouter_init(so, *mtod(m, int *), cmd)); 315 case MRT6_DONE: 316 return (ip6_mrouter_done()); 317 case MRT6_ADD_MIF: 318 if (m == NULL || m->m_len < sizeof(struct mif6ctl)) 319 return (EINVAL); 320 return (add_m6if(mtod(m, struct mif6ctl *))); 321 case MRT6_DEL_MIF: 322 if (m == NULL || m->m_len < sizeof(mifi_t)) 323 return (EINVAL); 324 return (del_m6if(mtod(m, mifi_t *))); 325 case MRT6_ADD_MFC: 326 if (m == NULL || m->m_len < sizeof(struct mf6cctl)) 327 return (EINVAL); 328 return (add_m6fc(mtod(m, struct mf6cctl *))); 329 case MRT6_DEL_MFC: 330 if (m == NULL || m->m_len < sizeof(struct mf6cctl)) 331 return (EINVAL); 332 return (del_m6fc(mtod(m, struct mf6cctl *))); 333 case MRT6_PIM: 334 if (m == NULL || m->m_len < sizeof(int)) 335 return (EINVAL); 336 return (set_pim6(mtod(m, int *))); 337 default: 338 return (EOPNOTSUPP); 339 } 340 } 341 342 /* 343 * Handle MRT getsockopt commands 344 */ 345 int 346 ip6_mrouter_get(cmd, so, m) 347 int cmd; 348 struct socket *so; 349 struct mbuf **m; 350 { 351 struct mbuf *mb; 352 353 if (so != ip6_mrouter) return EACCES; 354 355 *m = mb = m_get(M_WAIT, MT_SOOPTS); 356 357 switch (cmd) { 358 case MRT6_PIM: 359 return get_pim6(mb); 360 default: 361 m_free(mb); 362 return EOPNOTSUPP; 363 } 364 } 365 366 /* 367 * Handle ioctl commands to obtain information from the cache 368 */ 369 int 370 mrt6_ioctl(cmd, data) 371 int cmd; 372 caddr_t data; 373 { 374 375 switch (cmd) { 376 case SIOCGETSGCNT_IN6: 377 return (get_sg_cnt((struct sioc_sg_req6 *)data)); 378 case SIOCGETMIFCNT_IN6: 379 return (get_mif6_cnt((struct sioc_mif_req6 *)data)); 380 default: 381 return (EINVAL); 382 } 383 } 384 385 /* 386 * returns the packet, byte, rpf-failure count for the source group provided 387 */ 388 static int 389 get_sg_cnt(req) 390 struct sioc_sg_req6 *req; 391 { 392 struct mf6c *rt; 393 int s; 394 395 s = splsoftnet(); 396 MF6CFIND(req->src.sin6_addr, req->grp.sin6_addr, rt); 397 splx(s); 398 if (rt != NULL) { 399 req->pktcnt = rt->mf6c_pkt_cnt; 400 req->bytecnt = rt->mf6c_byte_cnt; 401 req->wrong_if = rt->mf6c_wrong_if; 402 } else 403 return (ESRCH); 404 #if 0 405 req->pktcnt = req->bytecnt = req->wrong_if = 0xffffffff; 406 #endif 407 408 return 0; 409 } 410 411 /* 412 * returns the input and output packet and byte counts on the mif provided 413 */ 414 static int 415 get_mif6_cnt(req) 416 struct sioc_mif_req6 *req; 417 { 418 mifi_t mifi = req->mifi; 419 420 if (mifi >= nummifs) 421 return EINVAL; 422 423 req->icount = mif6table[mifi].m6_pkt_in; 424 req->ocount = mif6table[mifi].m6_pkt_out; 425 req->ibytes = mif6table[mifi].m6_bytes_in; 426 req->obytes = mif6table[mifi].m6_bytes_out; 427 428 return 0; 429 } 430 431 /* 432 * Get PIM processiong global 433 */ 434 static int 435 get_pim6(m) 436 struct mbuf *m; 437 { 438 int *i; 439 440 i = mtod(m, int *); 441 442 *i = pim6; 443 444 return 0; 445 } 446 447 static int 448 set_pim6(i) 449 int *i; 450 { 451 if ((*i != 1) && (*i != 0)) 452 return EINVAL; 453 454 pim6 = *i; 455 456 return 0; 457 } 458 459 /* 460 * Enable multicast routing 461 */ 462 static int 463 ip6_mrouter_init(so, v, cmd) 464 struct socket *so; 465 int v; 466 int cmd; 467 { 468 #ifdef MRT6DEBUG 469 if (mrt6debug) 470 log(LOG_DEBUG, 471 "ip6_mrouter_init: so_type = %d, pr_protocol = %d\n", 472 so->so_type, so->so_proto->pr_protocol); 473 #endif 474 475 if (so->so_type != SOCK_RAW || 476 so->so_proto->pr_protocol != IPPROTO_ICMPV6) 477 return (EOPNOTSUPP); 478 479 if (v != 1) 480 return (ENOPROTOOPT); 481 482 if (ip6_mrouter != NULL) 483 return (EADDRINUSE); 484 485 ip6_mrouter = so; 486 ip6_mrouter_ver = cmd; 487 488 bzero((caddr_t)mf6ctable, sizeof(mf6ctable)); 489 bzero((caddr_t)n6expire, sizeof(n6expire)); 490 491 pim6 = 0;/* used for stubbing out/in pim stuff */ 492 493 callout_init(&expire_upcalls_ch); 494 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 495 expire_upcalls, NULL); 496 497 #ifdef MRT6DEBUG 498 if (mrt6debug) 499 log(LOG_DEBUG, "ip6_mrouter_init\n"); 500 #endif 501 502 return 0; 503 } 504 505 /* 506 * Disable multicast routing 507 */ 508 int 509 ip6_mrouter_done() 510 { 511 mifi_t mifi; 512 int i; 513 struct ifnet *ifp; 514 struct in6_ifreq ifr; 515 struct mf6c *rt; 516 struct rtdetq *rte; 517 int s; 518 519 s = splsoftnet(); 520 521 /* 522 * For each phyint in use, disable promiscuous reception of all IPv6 523 * multicasts. 524 */ 525 #ifdef INET 526 #ifdef MROUTING 527 /* 528 * If there is still IPv4 multicast routing daemon, 529 * we remain interfaces to receive all muliticasted packets. 530 * XXX: there may be an interface in which the IPv4 multicast 531 * daemon is not interested... 532 */ 533 if (!ip_mrouter) 534 #endif 535 #endif 536 { 537 for (mifi = 0; mifi < nummifs; mifi++) { 538 if (mif6table[mifi].m6_ifp && 539 !(mif6table[mifi].m6_flags & MIFF_REGISTER)) { 540 ifr.ifr_addr.sin6_family = AF_INET6; 541 ifr.ifr_addr.sin6_addr= in6addr_any; 542 ifp = mif6table[mifi].m6_ifp; 543 (*ifp->if_ioctl)(ifp, SIOCDELMULTI, 544 (caddr_t)&ifr); 545 } 546 } 547 } 548 #ifdef notyet 549 bzero((caddr_t)qtable, sizeof(qtable)); 550 bzero((caddr_t)tbftable, sizeof(tbftable)); 551 #endif 552 bzero((caddr_t)mif6table, sizeof(mif6table)); 553 nummifs = 0; 554 555 pim6 = 0; /* used to stub out/in pim specific code */ 556 557 callout_stop(&expire_upcalls_ch); 558 559 /* 560 * Free all multicast forwarding cache entries. 561 */ 562 for (i = 0; i < MF6CTBLSIZ; i++) { 563 rt = mf6ctable[i]; 564 while (rt) { 565 struct mf6c *frt; 566 567 for (rte = rt->mf6c_stall; rte != NULL; ) { 568 struct rtdetq *n = rte->next; 569 570 m_free(rte->m); 571 free(rte, M_MRTABLE); 572 rte = n; 573 } 574 frt = rt; 575 rt = rt->mf6c_next; 576 free(frt, M_MRTABLE); 577 } 578 } 579 580 bzero((caddr_t)mf6ctable, sizeof(mf6ctable)); 581 582 /* 583 * Reset register interface 584 */ 585 if (reg_mif_num != (mifi_t)-1) { 586 if_detach(&multicast_register_if6); 587 reg_mif_num = (mifi_t)-1; 588 } 589 590 ip6_mrouter = NULL; 591 ip6_mrouter_ver = 0; 592 593 splx(s); 594 595 #ifdef MRT6DEBUG 596 if (mrt6debug) 597 log(LOG_DEBUG, "ip6_mrouter_done\n"); 598 #endif 599 600 return 0; 601 } 602 603 void 604 ip6_mrouter_detach(ifp) 605 struct ifnet *ifp; 606 { 607 struct rtdetq *rte; 608 struct mf6c *mfc; 609 mifi_t mifi; 610 int i; 611 612 if (ip6_mrouter == NULL) 613 return; 614 615 /* 616 * Delete a mif which points to ifp. 617 */ 618 for (mifi = 0; mifi < nummifs; mifi++) 619 if (mif6table[mifi].m6_ifp == ifp) 620 del_m6if(&mifi); 621 622 /* 623 * Clear rte->ifp of cache entries received on ifp. 624 */ 625 for (i = 0; i < MF6CTBLSIZ; i++) { 626 if (n6expire[i] == 0) 627 continue; 628 629 for (mfc = mf6ctable[i]; mfc != NULL; mfc = mfc->mf6c_next) { 630 for (rte = mfc->mf6c_stall; rte != NULL; rte = rte->next) { 631 if (rte->ifp == ifp) 632 rte->ifp = NULL; 633 } 634 } 635 } 636 } 637 638 639 /* 640 * Add a mif to the mif table 641 */ 642 static int 643 add_m6if(mifcp) 644 struct mif6ctl *mifcp; 645 { 646 struct mif6 *mifp; 647 struct ifnet *ifp; 648 struct in6_ifreq ifr; 649 int error, s; 650 #ifdef notyet 651 struct tbf *m_tbf = tbftable + mifcp->mif6c_mifi; 652 #endif 653 654 if (mifcp->mif6c_mifi >= MAXMIFS) 655 return EINVAL; 656 mifp = mif6table + mifcp->mif6c_mifi; 657 if (mifp->m6_ifp) 658 return EADDRINUSE; /* XXX: is it appropriate? */ 659 if (mifcp->mif6c_pifi == 0 || mifcp->mif6c_pifi >= if_indexlim) 660 return ENXIO; 661 /* 662 * XXX: some OSes can remove ifp and clear ifindex2ifnet[id] 663 * even for id between 0 and if_index. 664 */ 665 if ((ifp = ifindex2ifnet[mifcp->mif6c_pifi]) == NULL) 666 return ENXIO; 667 668 if (mifcp->mif6c_flags & MIFF_REGISTER) { 669 ifp = &multicast_register_if6; 670 671 if (reg_mif_num == (mifi_t)-1) { 672 strlcpy(ifp->if_xname, "register_mif", 673 sizeof(ifp->if_xname)); 674 ifp->if_flags |= IFF_LOOPBACK; 675 ifp->if_index = mifcp->mif6c_mifi; 676 reg_mif_num = mifcp->mif6c_mifi; 677 if_attach(ifp); 678 } 679 680 } /* if REGISTER */ 681 else { 682 /* Make sure the interface supports multicast */ 683 if ((ifp->if_flags & IFF_MULTICAST) == 0) 684 return EOPNOTSUPP; 685 686 s = splsoftnet(); 687 /* 688 * Enable promiscuous reception of all IPv6 multicasts 689 * from the interface. 690 */ 691 ifr.ifr_addr.sin6_family = AF_INET6; 692 ifr.ifr_addr.sin6_addr = in6addr_any; 693 error = (*ifp->if_ioctl)(ifp, SIOCADDMULTI, (caddr_t)&ifr); 694 splx(s); 695 if (error) 696 return error; 697 } 698 699 s = splsoftnet(); 700 mifp->m6_flags = mifcp->mif6c_flags; 701 mifp->m6_ifp = ifp; 702 #ifdef notyet 703 /* scaling up here allows division by 1024 in critical code */ 704 mifp->m6_rate_limit = mifcp->mif6c_rate_limit * 1024 / 1000; 705 #endif 706 /* initialize per mif pkt counters */ 707 mifp->m6_pkt_in = 0; 708 mifp->m6_pkt_out = 0; 709 mifp->m6_bytes_in = 0; 710 mifp->m6_bytes_out = 0; 711 splx(s); 712 713 /* Adjust nummifs up if the mifi is higher than nummifs */ 714 if (nummifs <= mifcp->mif6c_mifi) 715 nummifs = mifcp->mif6c_mifi + 1; 716 717 #ifdef MRT6DEBUG 718 if (mrt6debug) 719 log(LOG_DEBUG, 720 "add_mif #%d, phyint %s%d\n", 721 mifcp->mif6c_mifi, 722 ifp->if_name, ifp->if_unit); 723 #endif 724 725 return 0; 726 } 727 728 /* 729 * Delete a mif from the mif table 730 */ 731 static int 732 del_m6if(mifip) 733 mifi_t *mifip; 734 { 735 struct mif6 *mifp = mif6table + *mifip; 736 mifi_t mifi; 737 struct ifnet *ifp; 738 struct in6_ifreq ifr; 739 int s; 740 741 if (*mifip >= nummifs) 742 return EINVAL; 743 if (mifp->m6_ifp == NULL) 744 return EINVAL; 745 746 s = splsoftnet(); 747 748 if (!(mifp->m6_flags & MIFF_REGISTER)) { 749 /* 750 * XXX: what if there is yet IPv4 multicast daemon 751 * using the interface? 752 */ 753 ifp = mifp->m6_ifp; 754 755 ifr.ifr_addr.sin6_family = AF_INET6; 756 ifr.ifr_addr.sin6_addr = in6addr_any; 757 (*ifp->if_ioctl)(ifp, SIOCDELMULTI, (caddr_t)&ifr); 758 } else { 759 if (reg_mif_num != (mifi_t)-1) { 760 if_detach(&multicast_register_if6); 761 reg_mif_num = (mifi_t)-1; 762 } 763 } 764 765 #ifdef notyet 766 bzero((caddr_t)qtable[*mifip], sizeof(qtable[*mifip])); 767 bzero((caddr_t)mifp->m6_tbf, sizeof(*(mifp->m6_tbf))); 768 #endif 769 bzero((caddr_t)mifp, sizeof (*mifp)); 770 771 /* Adjust nummifs down */ 772 for (mifi = nummifs; mifi > 0; mifi--) 773 if (mif6table[mifi - 1].m6_ifp) 774 break; 775 nummifs = mifi; 776 777 splx(s); 778 779 #ifdef MRT6DEBUG 780 if (mrt6debug) 781 log(LOG_DEBUG, "del_m6if %d, nummifs %d\n", *mifip, nummifs); 782 #endif 783 784 return 0; 785 } 786 787 /* 788 * Add an mfc entry 789 */ 790 static int 791 add_m6fc(mfccp) 792 struct mf6cctl *mfccp; 793 { 794 struct mf6c *rt; 795 u_long hash; 796 struct rtdetq *rte; 797 u_short nstl; 798 int s; 799 800 MF6CFIND(mfccp->mf6cc_origin.sin6_addr, 801 mfccp->mf6cc_mcastgrp.sin6_addr, rt); 802 803 /* If an entry already exists, just update the fields */ 804 if (rt) { 805 #ifdef MRT6DEBUG 806 if (mrt6debug & DEBUG_MFC) 807 log(LOG_DEBUG,"add_m6fc update o %s g %s p %x\n", 808 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 809 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 810 mfccp->mf6cc_parent); 811 #endif 812 813 s = splsoftnet(); 814 rt->mf6c_parent = mfccp->mf6cc_parent; 815 rt->mf6c_ifset = mfccp->mf6cc_ifset; 816 splx(s); 817 return 0; 818 } 819 820 /* 821 * Find the entry for which the upcall was made and update 822 */ 823 s = splsoftnet(); 824 hash = MF6CHASH(mfccp->mf6cc_origin.sin6_addr, 825 mfccp->mf6cc_mcastgrp.sin6_addr); 826 for (rt = mf6ctable[hash], nstl = 0; rt; rt = rt->mf6c_next) { 827 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 828 &mfccp->mf6cc_origin.sin6_addr) && 829 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 830 &mfccp->mf6cc_mcastgrp.sin6_addr) && 831 (rt->mf6c_stall != NULL)) { 832 833 if (nstl++) 834 log(LOG_ERR, 835 "add_m6fc: %s o %s g %s p %x dbx %p\n", 836 "multiple kernel entries", 837 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 838 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 839 mfccp->mf6cc_parent, rt->mf6c_stall); 840 841 #ifdef MRT6DEBUG 842 if (mrt6debug & DEBUG_MFC) 843 log(LOG_DEBUG, 844 "add_m6fc o %s g %s p %x dbg %x\n", 845 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 846 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 847 mfccp->mf6cc_parent, rt->mf6c_stall); 848 #endif 849 850 rt->mf6c_origin = mfccp->mf6cc_origin; 851 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 852 rt->mf6c_parent = mfccp->mf6cc_parent; 853 rt->mf6c_ifset = mfccp->mf6cc_ifset; 854 /* initialize pkt counters per src-grp */ 855 rt->mf6c_pkt_cnt = 0; 856 rt->mf6c_byte_cnt = 0; 857 rt->mf6c_wrong_if = 0; 858 859 rt->mf6c_expire = 0; /* Don't clean this guy up */ 860 n6expire[hash]--; 861 862 /* free packets Qed at the end of this entry */ 863 for (rte = rt->mf6c_stall; rte != NULL; ) { 864 struct rtdetq *n = rte->next; 865 if (rte->ifp) { 866 ip6_mdq(rte->m, rte->ifp, rt); 867 } 868 m_freem(rte->m); 869 #ifdef UPCALL_TIMING 870 collate(&(rte->t)); 871 #endif /* UPCALL_TIMING */ 872 free(rte, M_MRTABLE); 873 rte = n; 874 } 875 rt->mf6c_stall = NULL; 876 } 877 } 878 879 /* 880 * It is possible that an entry is being inserted without an upcall 881 */ 882 if (nstl == 0) { 883 #ifdef MRT6DEBUG 884 if (mrt6debug & DEBUG_MFC) 885 log(LOG_DEBUG, 886 "add_mfc no upcall h %d o %s g %s p %x\n", 887 hash, 888 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 889 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 890 mfccp->mf6cc_parent); 891 #endif 892 893 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 894 895 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 896 &mfccp->mf6cc_origin.sin6_addr)&& 897 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 898 &mfccp->mf6cc_mcastgrp.sin6_addr)) { 899 900 rt->mf6c_origin = mfccp->mf6cc_origin; 901 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 902 rt->mf6c_parent = mfccp->mf6cc_parent; 903 rt->mf6c_ifset = mfccp->mf6cc_ifset; 904 /* initialize pkt counters per src-grp */ 905 rt->mf6c_pkt_cnt = 0; 906 rt->mf6c_byte_cnt = 0; 907 rt->mf6c_wrong_if = 0; 908 909 if (rt->mf6c_expire) 910 n6expire[hash]--; 911 rt->mf6c_expire = 0; 912 } 913 } 914 if (rt == NULL) { 915 /* no upcall, so make a new entry */ 916 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE, 917 M_NOWAIT); 918 if (rt == NULL) { 919 splx(s); 920 return ENOBUFS; 921 } 922 923 /* insert new entry at head of hash chain */ 924 rt->mf6c_origin = mfccp->mf6cc_origin; 925 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 926 rt->mf6c_parent = mfccp->mf6cc_parent; 927 rt->mf6c_ifset = mfccp->mf6cc_ifset; 928 /* initialize pkt counters per src-grp */ 929 rt->mf6c_pkt_cnt = 0; 930 rt->mf6c_byte_cnt = 0; 931 rt->mf6c_wrong_if = 0; 932 rt->mf6c_expire = 0; 933 rt->mf6c_stall = NULL; 934 935 /* link into table */ 936 rt->mf6c_next = mf6ctable[hash]; 937 mf6ctable[hash] = rt; 938 } 939 } 940 splx(s); 941 return 0; 942 } 943 944 #ifdef UPCALL_TIMING 945 /* 946 * collect delay statistics on the upcalls 947 */ 948 static void 949 collate(t) 950 struct timeval *t; 951 { 952 u_long d; 953 struct timeval tp; 954 u_long delta; 955 956 GET_TIME(tp); 957 958 if (TV_LT(*t, tp)) 959 { 960 TV_DELTA(tp, *t, delta); 961 962 d = delta >> 10; 963 if (d > UPCALL_MAX) 964 d = UPCALL_MAX; 965 966 ++upcall_data[d]; 967 } 968 } 969 #endif /* UPCALL_TIMING */ 970 971 /* 972 * Delete an mfc entry 973 */ 974 static int 975 del_m6fc(mfccp) 976 struct mf6cctl *mfccp; 977 { 978 struct sockaddr_in6 origin; 979 struct sockaddr_in6 mcastgrp; 980 struct mf6c *rt; 981 struct mf6c **nptr; 982 u_long hash; 983 int s; 984 985 origin = mfccp->mf6cc_origin; 986 mcastgrp = mfccp->mf6cc_mcastgrp; 987 hash = MF6CHASH(origin.sin6_addr, mcastgrp.sin6_addr); 988 989 #ifdef MRT6DEBUG 990 if (mrt6debug & DEBUG_MFC) 991 log(LOG_DEBUG,"del_m6fc orig %s mcastgrp %s\n", 992 ip6_sprintf(&origin.sin6_addr), 993 ip6_sprintf(&mcastgrp.sin6_addr)); 994 #endif 995 996 s = splsoftnet(); 997 998 nptr = &mf6ctable[hash]; 999 while ((rt = *nptr) != NULL) { 1000 if (IN6_ARE_ADDR_EQUAL(&origin.sin6_addr, 1001 &rt->mf6c_origin.sin6_addr) && 1002 IN6_ARE_ADDR_EQUAL(&mcastgrp.sin6_addr, 1003 &rt->mf6c_mcastgrp.sin6_addr) && 1004 rt->mf6c_stall == NULL) 1005 break; 1006 1007 nptr = &rt->mf6c_next; 1008 } 1009 if (rt == NULL) { 1010 splx(s); 1011 return EADDRNOTAVAIL; 1012 } 1013 1014 *nptr = rt->mf6c_next; 1015 free(rt, M_MRTABLE); 1016 1017 splx(s); 1018 1019 return 0; 1020 } 1021 1022 static int 1023 socket_send(s, mm, src) 1024 struct socket *s; 1025 struct mbuf *mm; 1026 struct sockaddr_in6 *src; 1027 { 1028 if (s) { 1029 if (sbappendaddr(&s->so_rcv, 1030 (struct sockaddr *)src, 1031 mm, (struct mbuf *)0) != 0) { 1032 sorwakeup(s); 1033 return 0; 1034 } 1035 } 1036 m_freem(mm); 1037 return -1; 1038 } 1039 1040 /* 1041 * IPv6 multicast forwarding function. This function assumes that the packet 1042 * pointed to by "ip6" has arrived on (or is about to be sent to) the interface 1043 * pointed to by "ifp", and the packet is to be relayed to other networks 1044 * that have members of the packet's destination IPv6 multicast group. 1045 * 1046 * The packet is returned unscathed to the caller, unless it is 1047 * erroneous, in which case a non-zero return value tells the caller to 1048 * discard it. 1049 */ 1050 1051 int 1052 ip6_mforward(ip6, ifp, m) 1053 struct ip6_hdr *ip6; 1054 struct ifnet *ifp; 1055 struct mbuf *m; 1056 { 1057 struct mf6c *rt; 1058 struct mif6 *mifp; 1059 struct mbuf *mm; 1060 int s; 1061 mifi_t mifi; 1062 struct sockaddr_in6 sin6; 1063 1064 #ifdef MRT6DEBUG 1065 if (mrt6debug & DEBUG_FORWARD) 1066 log(LOG_DEBUG, "ip6_mforward: src %s, dst %s, ifindex %d\n", 1067 ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst), 1068 ifp->if_index); 1069 #endif 1070 1071 /* 1072 * Don't forward a packet with Hop limit of zero or one, 1073 * or a packet destined to a local-only group. 1074 */ 1075 if (ip6->ip6_hlim <= 1 || IN6_IS_ADDR_MC_NODELOCAL(&ip6->ip6_dst) || 1076 IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst)) 1077 return 0; 1078 ip6->ip6_hlim--; 1079 1080 /* 1081 * Source address check: do not forward packets with unspecified 1082 * source. It was discussed in July 2000, on ipngwg mailing list. 1083 * This is rather more serious than unicast cases, because some 1084 * MLD packets can be sent with the unspecified source address 1085 * (although such packets must normally set the hop limit field to 1). 1086 */ 1087 if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) { 1088 ip6stat.ip6s_cantforward++; 1089 if (ip6_log_time + ip6_log_interval < time_second) { 1090 ip6_log_time = time_second; 1091 log(LOG_DEBUG, 1092 "cannot forward " 1093 "from %s to %s nxt %d received on %s\n", 1094 ip6_sprintf(&ip6->ip6_src), 1095 ip6_sprintf(&ip6->ip6_dst), 1096 ip6->ip6_nxt, 1097 m->m_pkthdr.rcvif ? 1098 if_name(m->m_pkthdr.rcvif) : "?"); 1099 } 1100 return 0; 1101 } 1102 1103 /* 1104 * Determine forwarding mifs from the forwarding cache table 1105 */ 1106 s = splsoftnet(); 1107 MF6CFIND(ip6->ip6_src, ip6->ip6_dst, rt); 1108 1109 /* Entry exists, so forward if necessary */ 1110 if (rt) { 1111 splx(s); 1112 return (ip6_mdq(m, ifp, rt)); 1113 } else { 1114 /* 1115 * If we don't have a route for packet's origin, 1116 * Make a copy of the packet & 1117 * send message to routing daemon 1118 */ 1119 1120 struct mbuf *mb0; 1121 struct rtdetq *rte; 1122 u_long hash; 1123 /* int i, npkts;*/ 1124 #ifdef UPCALL_TIMING 1125 struct timeval tp; 1126 1127 GET_TIME(tp); 1128 #endif /* UPCALL_TIMING */ 1129 1130 mrt6stat.mrt6s_no_route++; 1131 #ifdef MRT6DEBUG 1132 if (mrt6debug & (DEBUG_FORWARD | DEBUG_MFC)) 1133 log(LOG_DEBUG, "ip6_mforward: no rte s %s g %s\n", 1134 ip6_sprintf(&ip6->ip6_src), 1135 ip6_sprintf(&ip6->ip6_dst)); 1136 #endif 1137 1138 /* 1139 * Allocate mbufs early so that we don't do extra work if we 1140 * are just going to fail anyway. 1141 */ 1142 rte = (struct rtdetq *)malloc(sizeof(*rte), M_MRTABLE, 1143 M_NOWAIT); 1144 if (rte == NULL) { 1145 splx(s); 1146 return ENOBUFS; 1147 } 1148 mb0 = m_copy(m, 0, M_COPYALL); 1149 /* 1150 * Pullup packet header if needed before storing it, 1151 * as other references may modify it in the meantime. 1152 */ 1153 if (mb0 && 1154 (M_READONLY(mb0) || mb0->m_len < sizeof(struct ip6_hdr))) 1155 mb0 = m_pullup(mb0, sizeof(struct ip6_hdr)); 1156 if (mb0 == NULL) { 1157 free(rte, M_MRTABLE); 1158 splx(s); 1159 return ENOBUFS; 1160 } 1161 1162 /* is there an upcall waiting for this packet? */ 1163 hash = MF6CHASH(ip6->ip6_src, ip6->ip6_dst); 1164 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 1165 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, 1166 &rt->mf6c_origin.sin6_addr) && 1167 IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, 1168 &rt->mf6c_mcastgrp.sin6_addr) && 1169 (rt->mf6c_stall != NULL)) 1170 break; 1171 } 1172 1173 if (rt == NULL) { 1174 struct mrt6msg *im; 1175 struct omrt6msg *oim; 1176 1177 /* no upcall, so make a new entry */ 1178 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE, 1179 M_NOWAIT); 1180 if (rt == NULL) { 1181 free(rte, M_MRTABLE); 1182 m_freem(mb0); 1183 splx(s); 1184 return ENOBUFS; 1185 } 1186 /* 1187 * Make a copy of the header to send to the user 1188 * level process 1189 */ 1190 mm = m_copy(mb0, 0, sizeof(struct ip6_hdr)); 1191 1192 if (mm == NULL) { 1193 free(rte, M_MRTABLE); 1194 m_freem(mb0); 1195 free(rt, M_MRTABLE); 1196 splx(s); 1197 return ENOBUFS; 1198 } 1199 1200 /* 1201 * Send message to routing daemon 1202 */ 1203 (void)memset(&sin6, 0, sizeof(sin6)); 1204 sin6.sin6_len = sizeof(sin6); 1205 sin6.sin6_family = AF_INET6; 1206 sin6.sin6_addr = ip6->ip6_src; 1207 1208 im = NULL; 1209 oim = NULL; 1210 switch (ip6_mrouter_ver) { 1211 case MRT6_OINIT: 1212 oim = mtod(mm, struct omrt6msg *); 1213 oim->im6_msgtype = MRT6MSG_NOCACHE; 1214 oim->im6_mbz = 0; 1215 break; 1216 case MRT6_INIT: 1217 im = mtod(mm, struct mrt6msg *); 1218 im->im6_msgtype = MRT6MSG_NOCACHE; 1219 im->im6_mbz = 0; 1220 break; 1221 default: 1222 free(rte, M_MRTABLE); 1223 m_freem(mb0); 1224 free(rt, M_MRTABLE); 1225 splx(s); 1226 return EINVAL; 1227 } 1228 1229 #ifdef MRT6DEBUG 1230 if (mrt6debug & DEBUG_FORWARD) 1231 log(LOG_DEBUG, 1232 "getting the iif info in the kernel\n"); 1233 #endif 1234 1235 for (mifp = mif6table, mifi = 0; 1236 mifi < nummifs && mifp->m6_ifp != ifp; 1237 mifp++, mifi++) 1238 ; 1239 1240 switch (ip6_mrouter_ver) { 1241 case MRT6_OINIT: 1242 oim->im6_mif = mifi; 1243 break; 1244 case MRT6_INIT: 1245 im->im6_mif = mifi; 1246 break; 1247 } 1248 1249 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1250 log(LOG_WARNING, "ip6_mforward: ip6_mrouter " 1251 "socket queue full\n"); 1252 mrt6stat.mrt6s_upq_sockfull++; 1253 free(rte, M_MRTABLE); 1254 m_freem(mb0); 1255 free(rt, M_MRTABLE); 1256 splx(s); 1257 return ENOBUFS; 1258 } 1259 1260 mrt6stat.mrt6s_upcalls++; 1261 1262 /* insert new entry at head of hash chain */ 1263 bzero(rt, sizeof(*rt)); 1264 rt->mf6c_origin.sin6_family = AF_INET6; 1265 rt->mf6c_origin.sin6_len = sizeof(struct sockaddr_in6); 1266 rt->mf6c_origin.sin6_addr = ip6->ip6_src; 1267 rt->mf6c_mcastgrp.sin6_family = AF_INET6; 1268 rt->mf6c_mcastgrp.sin6_len = sizeof(struct sockaddr_in6); 1269 rt->mf6c_mcastgrp.sin6_addr = ip6->ip6_dst; 1270 rt->mf6c_expire = UPCALL_EXPIRE; 1271 n6expire[hash]++; 1272 rt->mf6c_parent = MF6C_INCOMPLETE_PARENT; 1273 1274 /* link into table */ 1275 rt->mf6c_next = mf6ctable[hash]; 1276 mf6ctable[hash] = rt; 1277 /* Add this entry to the end of the queue */ 1278 rt->mf6c_stall = rte; 1279 } else { 1280 /* determine if q has overflowed */ 1281 struct rtdetq **p; 1282 int npkts = 0; 1283 1284 for (p = &rt->mf6c_stall; *p != NULL; p = &(*p)->next) 1285 if (++npkts > MAX_UPQ6) { 1286 mrt6stat.mrt6s_upq_ovflw++; 1287 free(rte, M_MRTABLE); 1288 m_freem(mb0); 1289 splx(s); 1290 return 0; 1291 } 1292 1293 /* Add this entry to the end of the queue */ 1294 *p = rte; 1295 } 1296 1297 rte->next = NULL; 1298 rte->m = mb0; 1299 rte->ifp = ifp; 1300 #ifdef UPCALL_TIMING 1301 rte->t = tp; 1302 #endif /* UPCALL_TIMING */ 1303 1304 splx(s); 1305 1306 return 0; 1307 } 1308 } 1309 1310 /* 1311 * Clean up cache entries if upcalls are not serviced 1312 * Call from the Slow Timeout mechanism, every 0.25 seconds. 1313 */ 1314 static void 1315 expire_upcalls(unused) 1316 void *unused; 1317 { 1318 struct rtdetq *rte; 1319 struct mf6c *mfc, **nptr; 1320 int i; 1321 int s; 1322 1323 s = splsoftnet(); 1324 for (i = 0; i < MF6CTBLSIZ; i++) { 1325 if (n6expire[i] == 0) 1326 continue; 1327 nptr = &mf6ctable[i]; 1328 while ((mfc = *nptr) != NULL) { 1329 rte = mfc->mf6c_stall; 1330 /* 1331 * Skip real cache entries 1332 * Make sure it wasn't marked to not expire (shouldn't happen) 1333 * If it expires now 1334 */ 1335 if (rte != NULL && 1336 mfc->mf6c_expire != 0 && 1337 --mfc->mf6c_expire == 0) { 1338 #ifdef MRT6DEBUG 1339 if (mrt6debug & DEBUG_EXPIRE) 1340 log(LOG_DEBUG, "expire_upcalls: expiring (%s %s)\n", 1341 ip6_sprintf(&mfc->mf6c_origin.sin6_addr), 1342 ip6_sprintf(&mfc->mf6c_mcastgrp.sin6_addr)); 1343 #endif 1344 /* 1345 * drop all the packets 1346 * free the mbuf with the pkt, if, timing info 1347 */ 1348 do { 1349 struct rtdetq *n = rte->next; 1350 m_freem(rte->m); 1351 free(rte, M_MRTABLE); 1352 rte = n; 1353 } while (rte != NULL); 1354 mrt6stat.mrt6s_cache_cleanups++; 1355 n6expire[i]--; 1356 1357 *nptr = mfc->mf6c_next; 1358 free(mfc, M_MRTABLE); 1359 } else { 1360 nptr = &mfc->mf6c_next; 1361 } 1362 } 1363 } 1364 splx(s); 1365 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 1366 expire_upcalls, NULL); 1367 } 1368 1369 /* 1370 * Packet forwarding routine once entry in the cache is made 1371 */ 1372 static int 1373 ip6_mdq(m, ifp, rt) 1374 struct mbuf *m; 1375 struct ifnet *ifp; 1376 struct mf6c *rt; 1377 { 1378 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 1379 mifi_t mifi, iif; 1380 struct mif6 *mifp; 1381 int plen = m->m_pkthdr.len; 1382 struct in6_addr src0, dst0; /* copies for local work */ 1383 u_int32_t iszone, idzone, oszone, odzone; 1384 int error = 0; 1385 1386 /* 1387 * Macro to send packet on mif. Since RSVP packets don't get counted on 1388 * input, they shouldn't get counted on output, so statistics keeping is 1389 * separate. 1390 */ 1391 1392 #define MC6_SEND(ip6, mifp, m) do { \ 1393 if ((mifp)->m6_flags & MIFF_REGISTER) \ 1394 register_send((ip6), (mifp), (m)); \ 1395 else \ 1396 phyint_send((ip6), (mifp), (m)); \ 1397 } while (/*CONSTCOND*/ 0) 1398 1399 /* 1400 * Don't forward if it didn't arrive from the parent mif 1401 * for its origin. 1402 */ 1403 mifi = rt->mf6c_parent; 1404 if ((mifi >= nummifs) || (mif6table[mifi].m6_ifp != ifp)) { 1405 /* came in the wrong interface */ 1406 #ifdef MRT6DEBUG 1407 if (mrt6debug & DEBUG_FORWARD) 1408 log(LOG_DEBUG, 1409 "wrong if: ifid %d mifi %d mififid %x\n", 1410 ifp->if_index, mifi, 1411 mif6table[mifi].m6_ifp ? 1412 mif6table[mifi].m6_ifp->if_index : -1); 1413 #endif 1414 mrt6stat.mrt6s_wrong_if++; 1415 rt->mf6c_wrong_if++; 1416 /* 1417 * If we are doing PIM processing, and we are forwarding 1418 * packets on this interface, send a message to the 1419 * routing daemon. 1420 */ 1421 /* have to make sure this is a valid mif */ 1422 if (mifi < nummifs && mif6table[mifi].m6_ifp) 1423 if (pim6 && (m->m_flags & M_LOOP) == 0) { 1424 /* 1425 * Check the M_LOOP flag to avoid an 1426 * unnecessary PIM assert. 1427 * XXX: M_LOOP is an ad-hoc hack... 1428 */ 1429 struct sockaddr_in6 sin6; 1430 1431 struct mbuf *mm; 1432 struct mrt6msg *im; 1433 struct omrt6msg *oim; 1434 1435 mm = m_copy(m, 0, sizeof(struct ip6_hdr)); 1436 if (mm && 1437 (M_READONLY(mm) || 1438 mm->m_len < sizeof(struct ip6_hdr))) 1439 mm = m_pullup(mm, sizeof(struct ip6_hdr)); 1440 if (mm == NULL) 1441 return ENOBUFS; 1442 1443 oim = NULL; 1444 im = NULL; 1445 switch (ip6_mrouter_ver) { 1446 case MRT6_OINIT: 1447 oim = mtod(mm, struct omrt6msg *); 1448 oim->im6_msgtype = MRT6MSG_WRONGMIF; 1449 oim->im6_mbz = 0; 1450 break; 1451 case MRT6_INIT: 1452 im = mtod(mm, struct mrt6msg *); 1453 im->im6_msgtype = MRT6MSG_WRONGMIF; 1454 im->im6_mbz = 0; 1455 break; 1456 default: 1457 m_freem(mm); 1458 return EINVAL; 1459 } 1460 1461 for (mifp = mif6table, iif = 0; 1462 iif < nummifs && mifp && 1463 mifp->m6_ifp != ifp; 1464 mifp++, iif++) 1465 ; 1466 1467 bzero(&sin6, sizeof(sin6)); 1468 sin6.sin6_len = sizeof(sin6); 1469 sin6.sin6_family = AF_INET6; 1470 switch (ip6_mrouter_ver) { 1471 case MRT6_OINIT: 1472 oim->im6_mif = iif; 1473 sin6.sin6_addr = oim->im6_src; 1474 break; 1475 case MRT6_INIT: 1476 im->im6_mif = iif; 1477 sin6.sin6_addr = im->im6_src; 1478 break; 1479 } 1480 1481 mrt6stat.mrt6s_upcalls++; 1482 1483 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1484 #ifdef MRT6DEBUG 1485 if (mrt6debug) 1486 log(LOG_WARNING, "mdq, ip6_mrouter socket queue full\n"); 1487 #endif 1488 ++mrt6stat.mrt6s_upq_sockfull; 1489 return ENOBUFS; 1490 } /* if socket Q full */ 1491 } /* if PIM */ 1492 return 0; 1493 } /* if wrong iif */ 1494 1495 /* If I sourced this packet, it counts as output, else it was input. */ 1496 if (m->m_pkthdr.rcvif == NULL) { 1497 /* XXX: is rcvif really NULL when output?? */ 1498 mif6table[mifi].m6_pkt_out++; 1499 mif6table[mifi].m6_bytes_out += plen; 1500 } else { 1501 mif6table[mifi].m6_pkt_in++; 1502 mif6table[mifi].m6_bytes_in += plen; 1503 } 1504 rt->mf6c_pkt_cnt++; 1505 rt->mf6c_byte_cnt += plen; 1506 1507 /* 1508 * For each mif, forward a copy of the packet if there are group 1509 * members downstream on the interface. 1510 */ 1511 src0 = ip6->ip6_src; 1512 dst0 = ip6->ip6_dst; 1513 if ((error = in6_setscope(&src0, ifp, &iszone)) != 0 || 1514 (error = in6_setscope(&dst0, ifp, &idzone)) != 0) { 1515 ip6stat.ip6s_badscope++; 1516 return (error); 1517 } 1518 for (mifp = mif6table, mifi = 0; mifi < nummifs; mifp++, mifi++) 1519 if (IF_ISSET(mifi, &rt->mf6c_ifset)) { 1520 if (mif6table[mifi].m6_ifp == NULL) 1521 continue; 1522 /* 1523 * check if the outgoing packet is going to break 1524 * a scope boundary. 1525 * XXX: For packets through PIM register tunnel 1526 * interface, we believe the routing daemon. 1527 */ 1528 if ((mif6table[rt->mf6c_parent].m6_flags & 1529 MIFF_REGISTER) == 0 && 1530 (mif6table[mifi].m6_flags & MIFF_REGISTER) == 0) { 1531 if (in6_setscope(&src0, mif6table[mifi].m6_ifp, 1532 &oszone) || 1533 in6_setscope(&dst0, mif6table[mifi].m6_ifp, 1534 &odzone) || 1535 iszone != oszone || idzone != odzone) { 1536 ip6stat.ip6s_badscope++; 1537 continue; 1538 } 1539 } 1540 1541 mifp->m6_pkt_out++; 1542 mifp->m6_bytes_out += plen; 1543 MC6_SEND(ip6, mifp, m); 1544 } 1545 return 0; 1546 } 1547 1548 static void 1549 phyint_send(ip6, mifp, m) 1550 struct ip6_hdr *ip6; 1551 struct mif6 *mifp; 1552 struct mbuf *m; 1553 { 1554 struct mbuf *mb_copy; 1555 struct ifnet *ifp = mifp->m6_ifp; 1556 int error = 0; 1557 int s = splsoftnet(); 1558 static struct route_in6 ro; 1559 struct in6_multi *in6m; 1560 struct sockaddr_in6 dst6; 1561 u_long linkmtu; 1562 1563 /* 1564 * Make a new reference to the packet; make sure that 1565 * the IPv6 header is actually copied, not just referenced, 1566 * so that ip6_output() only scribbles on the copy. 1567 */ 1568 mb_copy = m_copy(m, 0, M_COPYALL); 1569 if (mb_copy && 1570 (M_READONLY(mb_copy) || mb_copy->m_len < sizeof(struct ip6_hdr))) 1571 mb_copy = m_pullup(mb_copy, sizeof(struct ip6_hdr)); 1572 if (mb_copy == NULL) { 1573 splx(s); 1574 return; 1575 } 1576 /* set MCAST flag to the outgoing packet */ 1577 mb_copy->m_flags |= M_MCAST; 1578 1579 /* 1580 * If we sourced the packet, call ip6_output since we may divide 1581 * the packet into fragments when the packet is too big for the 1582 * outgoing interface. 1583 * Otherwise, we can simply send the packet to the interface 1584 * sending queue. 1585 */ 1586 if (m->m_pkthdr.rcvif == NULL) { 1587 struct ip6_moptions im6o; 1588 1589 im6o.im6o_multicast_ifp = ifp; 1590 /* XXX: ip6_output will override ip6->ip6_hlim */ 1591 im6o.im6o_multicast_hlim = ip6->ip6_hlim; 1592 im6o.im6o_multicast_loop = 1; 1593 error = ip6_output(mb_copy, NULL, &ro, IPV6_FORWARDING, 1594 &im6o, (struct socket *)0, NULL); 1595 1596 #ifdef MRT6DEBUG 1597 if (mrt6debug & DEBUG_XMIT) 1598 log(LOG_DEBUG, "phyint_send on mif %d err %d\n", 1599 mifp - mif6table, error); 1600 #endif 1601 splx(s); 1602 return; 1603 } 1604 1605 /* 1606 * If we belong to the destination multicast group 1607 * on the outgoing interface, loop back a copy. 1608 */ 1609 /* 1610 * Does not have to check source info, as it's alreay covered by 1611 * ip6_input 1612 */ 1613 memset(&dst6, 0, sizeof(dst6)); 1614 dst6.sin6_family = AF_INET6; 1615 dst6.sin6_len = sizeof(struct sockaddr_in6); 1616 dst6.sin6_addr = ip6->ip6_dst; 1617 1618 IN6_LOOKUP_MULTI(ip6->ip6_dst, ifp, in6m); 1619 if (in6m != NULL) 1620 ip6_mloopback(ifp, m, (struct sockaddr_in6 *)&ro.ro_dst); 1621 1622 /* 1623 * Put the packet into the sending queue of the outgoing interface 1624 * if it would fit in the MTU of the interface. 1625 */ 1626 linkmtu = IN6_LINKMTU(ifp); 1627 if (mb_copy->m_pkthdr.len <= linkmtu || linkmtu < IPV6_MMTU) { 1628 /* 1629 * We could call if_output directly here, but we use 1630 * nd6_output on purpose to see if IPv6 operation is allowed 1631 * on the interface. 1632 */ 1633 error = nd6_output(ifp, ifp, mb_copy, &dst6, NULL); 1634 #ifdef MRT6DEBUG 1635 if (mrt6debug & DEBUG_XMIT) 1636 log(LOG_DEBUG, "phyint_send on mif %d err %d\n", 1637 mifp - mif6table, error); 1638 #endif 1639 } else { 1640 /* 1641 * pMTU discovery is intentionally disabled by default, since 1642 * various router may notify pMTU in multicast, which can be 1643 * a DDoS to a router 1644 */ 1645 if (ip6_mcast_pmtu) 1646 icmp6_error(mb_copy, ICMP6_PACKET_TOO_BIG, 0, linkmtu); 1647 else { 1648 #ifdef MRT6DEBUG 1649 if (mrt6debug & DEBUG_XMIT) 1650 log(LOG_DEBUG, 1651 "phyint_send: packet too big on %s o %s g %s" 1652 " size %d(discarded)\n", 1653 if_name(ifp), 1654 ip6_sprintf(&ip6->ip6_src), 1655 ip6_sprintf(&ip6->ip6_dst), 1656 mb_copy->m_pkthdr.len); 1657 #endif /* MRT6DEBUG */ 1658 m_freem(mb_copy); /* simply discard the packet */ 1659 } 1660 } 1661 1662 splx(s); 1663 } 1664 1665 static int 1666 register_send(ip6, mif, m) 1667 struct ip6_hdr *ip6; 1668 struct mif6 *mif; 1669 struct mbuf *m; 1670 { 1671 struct mbuf *mm; 1672 int i, len = m->m_pkthdr.len; 1673 struct sockaddr_in6 sin6; 1674 struct mrt6msg *im6; 1675 1676 #ifdef MRT6DEBUG 1677 if (mrt6debug) 1678 log(LOG_DEBUG, "** IPv6 register_send **\n src %s dst %s\n", 1679 ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst)); 1680 #endif 1681 ++pim6stat.pim6s_snd_registers; 1682 1683 /* Make a copy of the packet to send to the user level process */ 1684 MGETHDR(mm, M_DONTWAIT, MT_HEADER); 1685 if (mm == NULL) 1686 return ENOBUFS; 1687 mm->m_data += max_linkhdr; 1688 mm->m_len = sizeof(struct ip6_hdr); 1689 1690 if ((mm->m_next = m_copy(m, 0, M_COPYALL)) == NULL) { 1691 m_freem(mm); 1692 return ENOBUFS; 1693 } 1694 i = MHLEN - M_LEADINGSPACE(mm); 1695 if (i > len) 1696 i = len; 1697 mm = m_pullup(mm, i); 1698 if (mm == NULL) 1699 return ENOBUFS; 1700 /* TODO: check it! */ 1701 mm->m_pkthdr.len = len + sizeof(struct ip6_hdr); 1702 1703 /* 1704 * Send message to routing daemon 1705 */ 1706 (void)memset(&sin6, 0, sizeof(sin6)); 1707 sin6.sin6_len = sizeof(sin6); 1708 sin6.sin6_family = AF_INET6; 1709 sin6.sin6_addr = ip6->ip6_src; 1710 1711 im6 = mtod(mm, struct mrt6msg *); 1712 im6->im6_msgtype = MRT6MSG_WHOLEPKT; 1713 im6->im6_mbz = 0; 1714 1715 im6->im6_mif = mif - mif6table; 1716 1717 /* iif info is not given for reg. encap.n */ 1718 mrt6stat.mrt6s_upcalls++; 1719 1720 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1721 #ifdef MRT6DEBUG 1722 if (mrt6debug) 1723 log(LOG_WARNING, 1724 "register_send: ip6_mrouter socket queue full\n"); 1725 #endif 1726 ++mrt6stat.mrt6s_upq_sockfull; 1727 return ENOBUFS; 1728 } 1729 return 0; 1730 } 1731 1732 /* 1733 * PIM sparse mode hook 1734 * Receives the pim control messages, and passes them up to the listening 1735 * socket, using rip6_input. 1736 * The only message processed is the REGISTER pim message; the pim header 1737 * is stripped off, and the inner packet is passed to register_mforward. 1738 */ 1739 int 1740 pim6_input(mp, offp, proto) 1741 struct mbuf **mp; 1742 int *offp, proto; 1743 { 1744 struct pim *pim; /* pointer to a pim struct */ 1745 struct ip6_hdr *ip6; 1746 int pimlen; 1747 struct mbuf *m = *mp; 1748 int minlen; 1749 int off = *offp; 1750 1751 ++pim6stat.pim6s_rcv_total; 1752 1753 ip6 = mtod(m, struct ip6_hdr *); 1754 pimlen = m->m_pkthdr.len - *offp; 1755 1756 /* 1757 * Validate lengths 1758 */ 1759 if (pimlen < PIM_MINLEN) { 1760 ++pim6stat.pim6s_rcv_tooshort; 1761 #ifdef MRT6DEBUG 1762 if (mrt6debug & DEBUG_PIM) 1763 log(LOG_DEBUG,"pim6_input: PIM packet too short\n"); 1764 #endif 1765 m_freem(m); 1766 return (IPPROTO_DONE); 1767 } 1768 1769 /* 1770 * if the packet is at least as big as a REGISTER, go ahead 1771 * and grab the PIM REGISTER header size, to avoid another 1772 * possible m_pullup() later. 1773 * 1774 * PIM_MINLEN == pimhdr + u_int32 == 8 1775 * PIM6_REG_MINLEN == pimhdr + reghdr + eip6hdr == 4 + 4 + 40 1776 */ 1777 minlen = (pimlen >= PIM6_REG_MINLEN) ? PIM6_REG_MINLEN : PIM_MINLEN; 1778 1779 /* 1780 * Make sure that the IP6 and PIM headers in contiguous memory, and 1781 * possibly the PIM REGISTER header 1782 */ 1783 IP6_EXTHDR_GET(pim, struct pim *, m, off, minlen); 1784 if (pim == NULL) { 1785 pim6stat.pim6s_rcv_tooshort++; 1786 return IPPROTO_DONE; 1787 } 1788 1789 /* PIM version check */ 1790 if (pim->pim_ver != PIM_VERSION) { 1791 ++pim6stat.pim6s_rcv_badversion; 1792 #ifdef MRT6DEBUG 1793 log(LOG_ERR, 1794 "pim6_input: incorrect version %d, expecting %d\n", 1795 pim->pim_ver, PIM_VERSION); 1796 #endif 1797 m_freem(m); 1798 return (IPPROTO_DONE); 1799 } 1800 1801 #define PIM6_CHECKSUM 1802 #ifdef PIM6_CHECKSUM 1803 { 1804 int cksumlen; 1805 1806 /* 1807 * Validate checksum. 1808 * If PIM REGISTER, exclude the data packet 1809 */ 1810 if (pim->pim_type == PIM_REGISTER) 1811 cksumlen = PIM_MINLEN; 1812 else 1813 cksumlen = pimlen; 1814 1815 if (in6_cksum(m, IPPROTO_PIM, off, cksumlen)) { 1816 ++pim6stat.pim6s_rcv_badsum; 1817 #ifdef MRT6DEBUG 1818 if (mrt6debug & DEBUG_PIM) 1819 log(LOG_DEBUG, 1820 "pim6_input: invalid checksum\n"); 1821 #endif 1822 m_freem(m); 1823 return (IPPROTO_DONE); 1824 } 1825 } 1826 #endif /* PIM_CHECKSUM */ 1827 1828 if (pim->pim_type == PIM_REGISTER) { 1829 /* 1830 * since this is a REGISTER, we'll make a copy of the register 1831 * headers ip6+pim+u_int32_t+encap_ip6, to be passed up to the 1832 * routing daemon. 1833 */ 1834 static struct sockaddr_in6 dst = { sizeof(dst), AF_INET6 }; 1835 1836 struct mbuf *mcp; 1837 struct ip6_hdr *eip6; 1838 u_int32_t *reghdr; 1839 1840 ++pim6stat.pim6s_rcv_registers; 1841 1842 if ((reg_mif_num >= nummifs) || (reg_mif_num == (mifi_t) -1)) { 1843 #ifdef MRT6DEBUG 1844 if (mrt6debug & DEBUG_PIM) 1845 log(LOG_DEBUG, 1846 "pim6_input: register mif not set: %d\n", 1847 reg_mif_num); 1848 #endif 1849 m_freem(m); 1850 return (IPPROTO_DONE); 1851 } 1852 1853 reghdr = (u_int32_t *)(pim + 1); 1854 1855 if ((ntohl(*reghdr) & PIM_NULL_REGISTER)) 1856 goto pim6_input_to_daemon; 1857 1858 /* 1859 * Validate length 1860 */ 1861 if (pimlen < PIM6_REG_MINLEN) { 1862 ++pim6stat.pim6s_rcv_tooshort; 1863 ++pim6stat.pim6s_rcv_badregisters; 1864 #ifdef MRT6DEBUG 1865 log(LOG_ERR, 1866 "pim6_input: register packet size too " 1867 "small %d from %s\n", 1868 pimlen, ip6_sprintf(&ip6->ip6_src)); 1869 #endif 1870 m_freem(m); 1871 return (IPPROTO_DONE); 1872 } 1873 1874 eip6 = (struct ip6_hdr *) (reghdr + 1); 1875 #ifdef MRT6DEBUG 1876 if (mrt6debug & DEBUG_PIM) 1877 log(LOG_DEBUG, 1878 "pim6_input[register], eip6: %s -> %s, " 1879 "eip6 plen %d\n", 1880 ip6_sprintf(&eip6->ip6_src), 1881 ip6_sprintf(&eip6->ip6_dst), 1882 ntohs(eip6->ip6_plen)); 1883 #endif 1884 1885 /* verify the version number of the inner packet */ 1886 if ((eip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) { 1887 ++pim6stat.pim6s_rcv_badregisters; 1888 #ifdef MRT6DEBUG 1889 log(LOG_DEBUG, "pim6_input: invalid IP version (%d) " 1890 "of the inner packet\n", 1891 (eip6->ip6_vfc & IPV6_VERSION)); 1892 #endif 1893 m_freem(m); 1894 return (IPPROTO_NONE); 1895 } 1896 1897 /* verify the inner packet is destined to a mcast group */ 1898 if (!IN6_IS_ADDR_MULTICAST(&eip6->ip6_dst)) { 1899 ++pim6stat.pim6s_rcv_badregisters; 1900 #ifdef MRT6DEBUG 1901 if (mrt6debug & DEBUG_PIM) 1902 log(LOG_DEBUG, 1903 "pim6_input: inner packet of register " 1904 "is not multicast %s\n", 1905 ip6_sprintf(&eip6->ip6_dst)); 1906 #endif 1907 m_freem(m); 1908 return (IPPROTO_DONE); 1909 } 1910 1911 /* 1912 * make a copy of the whole header to pass to the daemon later. 1913 */ 1914 mcp = m_copy(m, 0, off + PIM6_REG_MINLEN); 1915 if (mcp == NULL) { 1916 #ifdef MRT6DEBUG 1917 log(LOG_ERR, 1918 "pim6_input: pim register: " 1919 "could not copy register head\n"); 1920 #endif 1921 m_freem(m); 1922 return (IPPROTO_DONE); 1923 } 1924 1925 /* 1926 * forward the inner ip6 packet; point m_data at the inner ip6. 1927 */ 1928 m_adj(m, off + PIM_MINLEN); 1929 #ifdef MRT6DEBUG 1930 if (mrt6debug & DEBUG_PIM) { 1931 log(LOG_DEBUG, 1932 "pim6_input: forwarding decapsulated register: " 1933 "src %s, dst %s, mif %d\n", 1934 ip6_sprintf(&eip6->ip6_src), 1935 ip6_sprintf(&eip6->ip6_dst), 1936 reg_mif_num); 1937 } 1938 #endif 1939 1940 looutput(mif6table[reg_mif_num].m6_ifp, m, 1941 (struct sockaddr *) &dst, 1942 (struct rtentry *) NULL); 1943 1944 /* prepare the register head to send to the mrouting daemon */ 1945 m = mcp; 1946 } 1947 1948 /* 1949 * Pass the PIM message up to the daemon; if it is a register message 1950 * pass the 'head' only up to the daemon. This includes the 1951 * encapsulator ip6 header, pim header, register header and the 1952 * encapsulated ip6 header. 1953 */ 1954 pim6_input_to_daemon: 1955 rip6_input(&m, offp, proto); 1956 return (IPPROTO_DONE); 1957 } 1958 1959 SYSCTL_SETUP(sysctl_net_inet6_pim6_setup, "sysctl net.inet6.pim6 subtree setup") 1960 { 1961 sysctl_createv(clog, 0, NULL, NULL, 1962 CTLFLAG_PERMANENT, 1963 CTLTYPE_NODE, "net", NULL, 1964 NULL, 0, NULL, 0, 1965 CTL_NET, CTL_EOL); 1966 sysctl_createv(clog, 0, NULL, NULL, 1967 CTLFLAG_PERMANENT, 1968 CTLTYPE_NODE, "inet6", NULL, 1969 NULL, 0, NULL, 0, 1970 CTL_NET, PF_INET6, CTL_EOL); 1971 sysctl_createv(clog, 0, NULL, NULL, 1972 CTLFLAG_PERMANENT, 1973 CTLTYPE_NODE, "pim6", 1974 SYSCTL_DESCR("PIMv6 settings"), 1975 NULL, 0, NULL, 0, 1976 CTL_NET, PF_INET6, IPPROTO_PIM, CTL_EOL); 1977 1978 sysctl_createv(clog, 0, NULL, NULL, 1979 CTLFLAG_PERMANENT, 1980 CTLTYPE_STRUCT, "stats", 1981 SYSCTL_DESCR("PIMv6 statistics"), 1982 NULL, 0, &pim6stat, sizeof(pim6stat), 1983 CTL_NET, PF_INET6, IPPROTO_PIM, PIM6CTL_STATS, 1984 CTL_EOL); 1985 } 1986