ip6_mroute.c revision 1.86
1 /* $NetBSD: ip6_mroute.c,v 1.86 2007/11/27 22:45:30 christos 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 1.86 2007/11/27 22:45:30 christos 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(struct mbuf *, struct ifnet *, struct mf6c *); 159 static void phyint_send(struct ip6_hdr *, struct mif6 *, struct mbuf *); 160 161 static int set_pim6(int *); 162 static int get_pim6(struct mbuf *); 163 static int socket_send(struct socket *, struct mbuf *, 164 struct sockaddr_in6 *); 165 static int register_send(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(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(struct sioc_sg_req6 *); 286 static int get_mif6_cnt(struct sioc_mif_req6 *); 287 static int ip6_mrouter_init(struct socket *, int, int); 288 static int add_m6if(struct mif6ctl *); 289 static int del_m6if(mifi_t *); 290 static int add_m6fc(struct mf6cctl *); 291 static int del_m6fc(struct mf6cctl *); 292 293 static callout_t expire_upcalls_ch; 294 295 /* 296 * Handle MRT setsockopt commands to modify the multicast routing tables. 297 */ 298 int 299 ip6_mrouter_set(int cmd, struct socket *so, struct mbuf *m) 300 { 301 if (cmd != MRT6_INIT && so != ip6_mrouter) 302 return (EACCES); 303 304 switch (cmd) { 305 #ifdef MRT6_OINIT 306 case MRT6_OINIT: 307 #endif 308 case MRT6_INIT: 309 if (m == NULL || m->m_len != sizeof(int)) 310 return (EINVAL); 311 return (ip6_mrouter_init(so, *mtod(m, int *), cmd)); 312 case MRT6_DONE: 313 return (ip6_mrouter_done()); 314 case MRT6_ADD_MIF: 315 if (m == NULL || m->m_len != sizeof(struct mif6ctl)) 316 return (EINVAL); 317 return (add_m6if(mtod(m, struct mif6ctl *))); 318 case MRT6_DEL_MIF: 319 if (m == NULL || m->m_len != sizeof(mifi_t)) 320 return (EINVAL); 321 return (del_m6if(mtod(m, mifi_t *))); 322 case MRT6_ADD_MFC: 323 if (m == NULL || m->m_len != sizeof(struct mf6cctl)) 324 return (EINVAL); 325 return (add_m6fc(mtod(m, struct mf6cctl *))); 326 case MRT6_DEL_MFC: 327 if (m == NULL || m->m_len != sizeof(struct mf6cctl)) 328 return (EINVAL); 329 return (del_m6fc(mtod(m, struct mf6cctl *))); 330 case MRT6_PIM: 331 if (m == NULL || m->m_len != sizeof(int)) 332 return (EINVAL); 333 return (set_pim6(mtod(m, int *))); 334 default: 335 return (EOPNOTSUPP); 336 } 337 } 338 339 /* 340 * Handle MRT getsockopt commands 341 */ 342 int 343 ip6_mrouter_get(int cmd, struct socket *so, struct mbuf **m) 344 { 345 struct mbuf *mb; 346 347 if (so != ip6_mrouter) return EACCES; 348 349 *m = mb = m_get(M_WAIT, MT_SOOPTS); 350 351 switch (cmd) { 352 case MRT6_PIM: 353 return get_pim6(mb); 354 default: 355 m_free(mb); 356 return EOPNOTSUPP; 357 } 358 } 359 360 /* 361 * Handle ioctl commands to obtain information from the cache 362 */ 363 int 364 mrt6_ioctl(int cmd, void *data) 365 { 366 367 switch (cmd) { 368 case SIOCGETSGCNT_IN6: 369 return (get_sg_cnt((struct sioc_sg_req6 *)data)); 370 case SIOCGETMIFCNT_IN6: 371 return (get_mif6_cnt((struct sioc_mif_req6 *)data)); 372 default: 373 return (EINVAL); 374 } 375 } 376 377 /* 378 * returns the packet, byte, rpf-failure count for the source group provided 379 */ 380 static int 381 get_sg_cnt(struct sioc_sg_req6 *req) 382 { 383 struct mf6c *rt; 384 int s; 385 386 s = splsoftnet(); 387 MF6CFIND(req->src.sin6_addr, req->grp.sin6_addr, rt); 388 splx(s); 389 if (rt != NULL) { 390 req->pktcnt = rt->mf6c_pkt_cnt; 391 req->bytecnt = rt->mf6c_byte_cnt; 392 req->wrong_if = rt->mf6c_wrong_if; 393 } else 394 return (ESRCH); 395 #if 0 396 req->pktcnt = req->bytecnt = req->wrong_if = 0xffffffff; 397 #endif 398 399 return 0; 400 } 401 402 /* 403 * returns the input and output packet and byte counts on the mif provided 404 */ 405 static int 406 get_mif6_cnt(struct sioc_mif_req6 *req) 407 { 408 mifi_t mifi = req->mifi; 409 410 if (mifi >= nummifs) 411 return EINVAL; 412 413 req->icount = mif6table[mifi].m6_pkt_in; 414 req->ocount = mif6table[mifi].m6_pkt_out; 415 req->ibytes = mif6table[mifi].m6_bytes_in; 416 req->obytes = mif6table[mifi].m6_bytes_out; 417 418 return 0; 419 } 420 421 /* 422 * Get PIM processiong global 423 */ 424 static int 425 get_pim6(struct mbuf *m) 426 { 427 int *i; 428 429 i = mtod(m, int *); 430 431 *i = pim6; 432 433 return 0; 434 } 435 436 static int 437 set_pim6(int *i) 438 { 439 if ((*i != 1) && (*i != 0)) 440 return EINVAL; 441 442 pim6 = *i; 443 444 return 0; 445 } 446 447 /* 448 * Enable multicast routing 449 */ 450 static int 451 ip6_mrouter_init(struct socket *so, int v, int cmd) 452 { 453 #ifdef MRT6DEBUG 454 if (mrt6debug) 455 log(LOG_DEBUG, 456 "ip6_mrouter_init: so_type = %d, pr_protocol = %d\n", 457 so->so_type, so->so_proto->pr_protocol); 458 #endif 459 460 if (so->so_type != SOCK_RAW || 461 so->so_proto->pr_protocol != IPPROTO_ICMPV6) 462 return (EOPNOTSUPP); 463 464 if (v != 1) 465 return (ENOPROTOOPT); 466 467 if (ip6_mrouter != NULL) 468 return (EADDRINUSE); 469 470 ip6_mrouter = so; 471 ip6_mrouter_ver = cmd; 472 473 bzero((void *)mf6ctable, sizeof(mf6ctable)); 474 bzero((void *)n6expire, sizeof(n6expire)); 475 476 pim6 = 0;/* used for stubbing out/in pim stuff */ 477 478 callout_init(&expire_upcalls_ch, 0); 479 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 480 expire_upcalls, NULL); 481 482 #ifdef MRT6DEBUG 483 if (mrt6debug) 484 log(LOG_DEBUG, "ip6_mrouter_init\n"); 485 #endif 486 487 return 0; 488 } 489 490 /* 491 * Disable multicast routing 492 */ 493 int 494 ip6_mrouter_done() 495 { 496 mifi_t mifi; 497 int i; 498 struct ifnet *ifp; 499 struct in6_ifreq ifr; 500 struct mf6c *rt; 501 struct rtdetq *rte; 502 int s; 503 504 s = splsoftnet(); 505 506 /* 507 * For each phyint in use, disable promiscuous reception of all IPv6 508 * multicasts. 509 */ 510 #ifdef INET 511 #ifdef MROUTING 512 /* 513 * If there is still IPv4 multicast routing daemon, 514 * we remain interfaces to receive all muliticasted packets. 515 * XXX: there may be an interface in which the IPv4 multicast 516 * daemon is not interested... 517 */ 518 if (!ip_mrouter) 519 #endif 520 #endif 521 { 522 for (mifi = 0; mifi < nummifs; mifi++) { 523 if (mif6table[mifi].m6_ifp && 524 !(mif6table[mifi].m6_flags & MIFF_REGISTER)) { 525 ifr.ifr_addr.sin6_family = AF_INET6; 526 ifr.ifr_addr.sin6_addr= in6addr_any; 527 ifp = mif6table[mifi].m6_ifp; 528 (*ifp->if_ioctl)(ifp, SIOCDELMULTI, 529 (void *)&ifr); 530 } 531 } 532 } 533 #ifdef notyet 534 bzero((void *)qtable, sizeof(qtable)); 535 bzero((void *)tbftable, sizeof(tbftable)); 536 #endif 537 bzero((void *)mif6table, sizeof(mif6table)); 538 nummifs = 0; 539 540 pim6 = 0; /* used to stub out/in pim specific code */ 541 542 callout_stop(&expire_upcalls_ch); 543 544 /* 545 * Free all multicast forwarding cache entries. 546 */ 547 for (i = 0; i < MF6CTBLSIZ; i++) { 548 rt = mf6ctable[i]; 549 while (rt) { 550 struct mf6c *frt; 551 552 for (rte = rt->mf6c_stall; rte != NULL; ) { 553 struct rtdetq *n = rte->next; 554 555 m_free(rte->m); 556 free(rte, M_MRTABLE); 557 rte = n; 558 } 559 frt = rt; 560 rt = rt->mf6c_next; 561 free(frt, M_MRTABLE); 562 } 563 } 564 565 bzero((void *)mf6ctable, sizeof(mf6ctable)); 566 567 /* 568 * Reset register interface 569 */ 570 if (reg_mif_num != (mifi_t)-1) { 571 if_detach(&multicast_register_if6); 572 reg_mif_num = (mifi_t)-1; 573 } 574 575 ip6_mrouter = NULL; 576 ip6_mrouter_ver = 0; 577 578 splx(s); 579 580 #ifdef MRT6DEBUG 581 if (mrt6debug) 582 log(LOG_DEBUG, "ip6_mrouter_done\n"); 583 #endif 584 585 return 0; 586 } 587 588 void 589 ip6_mrouter_detach(struct ifnet *ifp) 590 { 591 struct rtdetq *rte; 592 struct mf6c *mfc; 593 mifi_t mifi; 594 int i; 595 596 if (ip6_mrouter == NULL) 597 return; 598 599 /* 600 * Delete a mif which points to ifp. 601 */ 602 for (mifi = 0; mifi < nummifs; mifi++) 603 if (mif6table[mifi].m6_ifp == ifp) 604 del_m6if(&mifi); 605 606 /* 607 * Clear rte->ifp of cache entries received on ifp. 608 */ 609 for (i = 0; i < MF6CTBLSIZ; i++) { 610 if (n6expire[i] == 0) 611 continue; 612 613 for (mfc = mf6ctable[i]; mfc != NULL; mfc = mfc->mf6c_next) { 614 for (rte = mfc->mf6c_stall; rte != NULL; rte = rte->next) { 615 if (rte->ifp == ifp) 616 rte->ifp = NULL; 617 } 618 } 619 } 620 } 621 622 623 /* 624 * Add a mif to the mif table 625 */ 626 static int 627 add_m6if(struct mif6ctl *mifcp) 628 { 629 struct mif6 *mifp; 630 struct ifnet *ifp; 631 struct in6_ifreq ifr; 632 int error, s; 633 #ifdef notyet 634 struct tbf *m_tbf = tbftable + mifcp->mif6c_mifi; 635 #endif 636 637 if (mifcp->mif6c_mifi >= MAXMIFS) 638 return EINVAL; 639 mifp = mif6table + mifcp->mif6c_mifi; 640 if (mifp->m6_ifp) 641 return EADDRINUSE; /* XXX: is it appropriate? */ 642 if (mifcp->mif6c_pifi == 0 || mifcp->mif6c_pifi >= if_indexlim) 643 return ENXIO; 644 /* 645 * XXX: some OSes can remove ifp and clear ifindex2ifnet[id] 646 * even for id between 0 and if_index. 647 */ 648 if ((ifp = ifindex2ifnet[mifcp->mif6c_pifi]) == NULL) 649 return ENXIO; 650 651 if (mifcp->mif6c_flags & MIFF_REGISTER) { 652 ifp = &multicast_register_if6; 653 654 if (reg_mif_num == (mifi_t)-1) { 655 strlcpy(ifp->if_xname, "register_mif", 656 sizeof(ifp->if_xname)); 657 ifp->if_flags |= IFF_LOOPBACK; 658 ifp->if_index = mifcp->mif6c_mifi; 659 reg_mif_num = mifcp->mif6c_mifi; 660 if_attach(ifp); 661 } 662 663 } /* if REGISTER */ 664 else { 665 /* Make sure the interface supports multicast */ 666 if ((ifp->if_flags & IFF_MULTICAST) == 0) 667 return EOPNOTSUPP; 668 669 s = splsoftnet(); 670 /* 671 * Enable promiscuous reception of all IPv6 multicasts 672 * from the interface. 673 */ 674 ifr.ifr_addr.sin6_family = AF_INET6; 675 ifr.ifr_addr.sin6_addr = in6addr_any; 676 error = (*ifp->if_ioctl)(ifp, SIOCADDMULTI, (void *)&ifr); 677 splx(s); 678 if (error) 679 return error; 680 } 681 682 s = splsoftnet(); 683 mifp->m6_flags = mifcp->mif6c_flags; 684 mifp->m6_ifp = ifp; 685 #ifdef notyet 686 /* scaling up here allows division by 1024 in critical code */ 687 mifp->m6_rate_limit = mifcp->mif6c_rate_limit * 1024 / 1000; 688 #endif 689 /* initialize per mif pkt counters */ 690 mifp->m6_pkt_in = 0; 691 mifp->m6_pkt_out = 0; 692 mifp->m6_bytes_in = 0; 693 mifp->m6_bytes_out = 0; 694 splx(s); 695 696 /* Adjust nummifs up if the mifi is higher than nummifs */ 697 if (nummifs <= mifcp->mif6c_mifi) 698 nummifs = mifcp->mif6c_mifi + 1; 699 700 #ifdef MRT6DEBUG 701 if (mrt6debug) 702 log(LOG_DEBUG, 703 "add_mif #%d, phyint %s\n", 704 mifcp->mif6c_mifi, ifp->if_xname); 705 #endif 706 707 return 0; 708 } 709 710 /* 711 * Delete a mif from the mif table 712 */ 713 static int 714 del_m6if(mifi_t *mifip) 715 { 716 struct mif6 *mifp = mif6table + *mifip; 717 mifi_t mifi; 718 struct ifnet *ifp; 719 struct in6_ifreq ifr; 720 int s; 721 722 if (*mifip >= nummifs) 723 return EINVAL; 724 if (mifp->m6_ifp == NULL) 725 return EINVAL; 726 727 s = splsoftnet(); 728 729 if (!(mifp->m6_flags & MIFF_REGISTER)) { 730 /* 731 * XXX: what if there is yet IPv4 multicast daemon 732 * using the interface? 733 */ 734 ifp = mifp->m6_ifp; 735 736 ifr.ifr_addr.sin6_family = AF_INET6; 737 ifr.ifr_addr.sin6_addr = in6addr_any; 738 (*ifp->if_ioctl)(ifp, SIOCDELMULTI, (void *)&ifr); 739 } else { 740 if (reg_mif_num != (mifi_t)-1) { 741 if_detach(&multicast_register_if6); 742 reg_mif_num = (mifi_t)-1; 743 } 744 } 745 746 #ifdef notyet 747 bzero((void *)qtable[*mifip], sizeof(qtable[*mifip])); 748 bzero((void *)mifp->m6_tbf, sizeof(*(mifp->m6_tbf))); 749 #endif 750 bzero((void *)mifp, sizeof (*mifp)); 751 752 /* Adjust nummifs down */ 753 for (mifi = nummifs; mifi > 0; mifi--) 754 if (mif6table[mifi - 1].m6_ifp) 755 break; 756 nummifs = mifi; 757 758 splx(s); 759 760 #ifdef MRT6DEBUG 761 if (mrt6debug) 762 log(LOG_DEBUG, "del_m6if %d, nummifs %d\n", *mifip, nummifs); 763 #endif 764 765 return 0; 766 } 767 768 /* 769 * Add an mfc entry 770 */ 771 static int 772 add_m6fc(struct mf6cctl *mfccp) 773 { 774 struct mf6c *rt; 775 u_long hash; 776 struct rtdetq *rte; 777 u_short nstl; 778 int s; 779 780 MF6CFIND(mfccp->mf6cc_origin.sin6_addr, 781 mfccp->mf6cc_mcastgrp.sin6_addr, rt); 782 783 /* If an entry already exists, just update the fields */ 784 if (rt) { 785 #ifdef MRT6DEBUG 786 if (mrt6debug & DEBUG_MFC) 787 log(LOG_DEBUG,"add_m6fc update o %s g %s p %x\n", 788 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 789 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 790 mfccp->mf6cc_parent); 791 #endif 792 793 s = splsoftnet(); 794 rt->mf6c_parent = mfccp->mf6cc_parent; 795 rt->mf6c_ifset = mfccp->mf6cc_ifset; 796 splx(s); 797 return 0; 798 } 799 800 /* 801 * Find the entry for which the upcall was made and update 802 */ 803 s = splsoftnet(); 804 hash = MF6CHASH(mfccp->mf6cc_origin.sin6_addr, 805 mfccp->mf6cc_mcastgrp.sin6_addr); 806 for (rt = mf6ctable[hash], nstl = 0; rt; rt = rt->mf6c_next) { 807 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 808 &mfccp->mf6cc_origin.sin6_addr) && 809 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 810 &mfccp->mf6cc_mcastgrp.sin6_addr) && 811 (rt->mf6c_stall != NULL)) { 812 813 if (nstl++) 814 log(LOG_ERR, 815 "add_m6fc: %s o %s g %s p %x dbx %p\n", 816 "multiple kernel entries", 817 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 818 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 819 mfccp->mf6cc_parent, rt->mf6c_stall); 820 821 #ifdef MRT6DEBUG 822 if (mrt6debug & DEBUG_MFC) 823 log(LOG_DEBUG, 824 "add_m6fc o %s g %s p %x dbg %p\n", 825 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 826 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 827 mfccp->mf6cc_parent, rt->mf6c_stall); 828 #endif 829 830 rt->mf6c_origin = mfccp->mf6cc_origin; 831 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 832 rt->mf6c_parent = mfccp->mf6cc_parent; 833 rt->mf6c_ifset = mfccp->mf6cc_ifset; 834 /* initialize pkt counters per src-grp */ 835 rt->mf6c_pkt_cnt = 0; 836 rt->mf6c_byte_cnt = 0; 837 rt->mf6c_wrong_if = 0; 838 839 rt->mf6c_expire = 0; /* Don't clean this guy up */ 840 n6expire[hash]--; 841 842 /* free packets Qed at the end of this entry */ 843 for (rte = rt->mf6c_stall; rte != NULL; ) { 844 struct rtdetq *n = rte->next; 845 if (rte->ifp) { 846 ip6_mdq(rte->m, rte->ifp, rt); 847 } 848 m_freem(rte->m); 849 #ifdef UPCALL_TIMING 850 collate(&(rte->t)); 851 #endif /* UPCALL_TIMING */ 852 free(rte, M_MRTABLE); 853 rte = n; 854 } 855 rt->mf6c_stall = NULL; 856 } 857 } 858 859 /* 860 * It is possible that an entry is being inserted without an upcall 861 */ 862 if (nstl == 0) { 863 #ifdef MRT6DEBUG 864 if (mrt6debug & DEBUG_MFC) 865 log(LOG_DEBUG, 866 "add_mfc no upcall h %ld o %s g %s p %x\n", 867 hash, 868 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 869 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 870 mfccp->mf6cc_parent); 871 #endif 872 873 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 874 875 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 876 &mfccp->mf6cc_origin.sin6_addr)&& 877 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 878 &mfccp->mf6cc_mcastgrp.sin6_addr)) { 879 880 rt->mf6c_origin = mfccp->mf6cc_origin; 881 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 882 rt->mf6c_parent = mfccp->mf6cc_parent; 883 rt->mf6c_ifset = mfccp->mf6cc_ifset; 884 /* initialize pkt counters per src-grp */ 885 rt->mf6c_pkt_cnt = 0; 886 rt->mf6c_byte_cnt = 0; 887 rt->mf6c_wrong_if = 0; 888 889 if (rt->mf6c_expire) 890 n6expire[hash]--; 891 rt->mf6c_expire = 0; 892 } 893 } 894 if (rt == NULL) { 895 /* no upcall, so make a new entry */ 896 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE, 897 M_NOWAIT); 898 if (rt == NULL) { 899 splx(s); 900 return ENOBUFS; 901 } 902 903 /* insert new entry at head of hash chain */ 904 rt->mf6c_origin = mfccp->mf6cc_origin; 905 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 906 rt->mf6c_parent = mfccp->mf6cc_parent; 907 rt->mf6c_ifset = mfccp->mf6cc_ifset; 908 /* initialize pkt counters per src-grp */ 909 rt->mf6c_pkt_cnt = 0; 910 rt->mf6c_byte_cnt = 0; 911 rt->mf6c_wrong_if = 0; 912 rt->mf6c_expire = 0; 913 rt->mf6c_stall = NULL; 914 915 /* link into table */ 916 rt->mf6c_next = mf6ctable[hash]; 917 mf6ctable[hash] = rt; 918 } 919 } 920 splx(s); 921 return 0; 922 } 923 924 #ifdef UPCALL_TIMING 925 /* 926 * collect delay statistics on the upcalls 927 */ 928 static void 929 collate(struct timeval *t) 930 { 931 u_long d; 932 struct timeval tp; 933 u_long delta; 934 935 GET_TIME(tp); 936 937 if (TV_LT(*t, tp)) 938 { 939 TV_DELTA(tp, *t, delta); 940 941 d = delta >> 10; 942 if (d > UPCALL_MAX) 943 d = UPCALL_MAX; 944 945 ++upcall_data[d]; 946 } 947 } 948 #endif /* UPCALL_TIMING */ 949 950 /* 951 * Delete an mfc entry 952 */ 953 static int 954 del_m6fc(struct mf6cctl *mfccp) 955 { 956 struct sockaddr_in6 origin; 957 struct sockaddr_in6 mcastgrp; 958 struct mf6c *rt; 959 struct mf6c **nptr; 960 u_long hash; 961 int s; 962 963 origin = mfccp->mf6cc_origin; 964 mcastgrp = mfccp->mf6cc_mcastgrp; 965 hash = MF6CHASH(origin.sin6_addr, mcastgrp.sin6_addr); 966 967 #ifdef MRT6DEBUG 968 if (mrt6debug & DEBUG_MFC) 969 log(LOG_DEBUG,"del_m6fc orig %s mcastgrp %s\n", 970 ip6_sprintf(&origin.sin6_addr), 971 ip6_sprintf(&mcastgrp.sin6_addr)); 972 #endif 973 974 s = splsoftnet(); 975 976 nptr = &mf6ctable[hash]; 977 while ((rt = *nptr) != NULL) { 978 if (IN6_ARE_ADDR_EQUAL(&origin.sin6_addr, 979 &rt->mf6c_origin.sin6_addr) && 980 IN6_ARE_ADDR_EQUAL(&mcastgrp.sin6_addr, 981 &rt->mf6c_mcastgrp.sin6_addr) && 982 rt->mf6c_stall == NULL) 983 break; 984 985 nptr = &rt->mf6c_next; 986 } 987 if (rt == NULL) { 988 splx(s); 989 return EADDRNOTAVAIL; 990 } 991 992 *nptr = rt->mf6c_next; 993 free(rt, M_MRTABLE); 994 995 splx(s); 996 997 return 0; 998 } 999 1000 static int 1001 socket_send(struct socket *s, struct mbuf *mm, struct sockaddr_in6 *src) 1002 { 1003 if (s) { 1004 if (sbappendaddr(&s->so_rcv, 1005 (struct sockaddr *)src, 1006 mm, (struct mbuf *)0) != 0) { 1007 sorwakeup(s); 1008 return 0; 1009 } 1010 } 1011 m_freem(mm); 1012 return -1; 1013 } 1014 1015 /* 1016 * IPv6 multicast forwarding function. This function assumes that the packet 1017 * pointed to by "ip6" has arrived on (or is about to be sent to) the interface 1018 * pointed to by "ifp", and the packet is to be relayed to other networks 1019 * that have members of the packet's destination IPv6 multicast group. 1020 * 1021 * The packet is returned unscathed to the caller, unless it is 1022 * erroneous, in which case a non-zero return value tells the caller to 1023 * discard it. 1024 */ 1025 1026 int 1027 ip6_mforward(struct ip6_hdr *ip6, struct ifnet *ifp, struct mbuf *m) 1028 { 1029 struct mf6c *rt; 1030 struct mif6 *mifp; 1031 struct mbuf *mm; 1032 int s; 1033 mifi_t mifi; 1034 struct sockaddr_in6 sin6; 1035 1036 #ifdef MRT6DEBUG 1037 if (mrt6debug & DEBUG_FORWARD) 1038 log(LOG_DEBUG, "ip6_mforward: src %s, dst %s, ifindex %d\n", 1039 ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst), 1040 ifp->if_index); 1041 #endif 1042 1043 /* 1044 * Don't forward a packet with Hop limit of zero or one, 1045 * or a packet destined to a local-only group. 1046 */ 1047 if (ip6->ip6_hlim <= 1 || IN6_IS_ADDR_MC_NODELOCAL(&ip6->ip6_dst) || 1048 IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst)) 1049 return 0; 1050 ip6->ip6_hlim--; 1051 1052 /* 1053 * Source address check: do not forward packets with unspecified 1054 * source. It was discussed in July 2000, on ipngwg mailing list. 1055 * This is rather more serious than unicast cases, because some 1056 * MLD packets can be sent with the unspecified source address 1057 * (although such packets must normally set the hop limit field to 1). 1058 */ 1059 if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) { 1060 ip6stat.ip6s_cantforward++; 1061 if (ip6_log_time + ip6_log_interval < time_second) { 1062 ip6_log_time = time_second; 1063 log(LOG_DEBUG, 1064 "cannot forward " 1065 "from %s to %s nxt %d received on %s\n", 1066 ip6_sprintf(&ip6->ip6_src), 1067 ip6_sprintf(&ip6->ip6_dst), 1068 ip6->ip6_nxt, 1069 m->m_pkthdr.rcvif ? 1070 if_name(m->m_pkthdr.rcvif) : "?"); 1071 } 1072 return 0; 1073 } 1074 1075 /* 1076 * Determine forwarding mifs from the forwarding cache table 1077 */ 1078 s = splsoftnet(); 1079 MF6CFIND(ip6->ip6_src, ip6->ip6_dst, rt); 1080 1081 /* Entry exists, so forward if necessary */ 1082 if (rt) { 1083 splx(s); 1084 return (ip6_mdq(m, ifp, rt)); 1085 } else { 1086 /* 1087 * If we don't have a route for packet's origin, 1088 * Make a copy of the packet & 1089 * send message to routing daemon 1090 */ 1091 1092 struct mbuf *mb0; 1093 struct rtdetq *rte; 1094 u_long hash; 1095 /* int i, npkts;*/ 1096 #ifdef UPCALL_TIMING 1097 struct timeval tp; 1098 1099 GET_TIME(tp); 1100 #endif /* UPCALL_TIMING */ 1101 1102 mrt6stat.mrt6s_no_route++; 1103 #ifdef MRT6DEBUG 1104 if (mrt6debug & (DEBUG_FORWARD | DEBUG_MFC)) 1105 log(LOG_DEBUG, "ip6_mforward: no rte s %s g %s\n", 1106 ip6_sprintf(&ip6->ip6_src), 1107 ip6_sprintf(&ip6->ip6_dst)); 1108 #endif 1109 1110 /* 1111 * Allocate mbufs early so that we don't do extra work if we 1112 * are just going to fail anyway. 1113 */ 1114 rte = (struct rtdetq *)malloc(sizeof(*rte), M_MRTABLE, 1115 M_NOWAIT); 1116 if (rte == NULL) { 1117 splx(s); 1118 return ENOBUFS; 1119 } 1120 mb0 = m_copy(m, 0, M_COPYALL); 1121 /* 1122 * Pullup packet header if needed before storing it, 1123 * as other references may modify it in the meantime. 1124 */ 1125 if (mb0 && 1126 (M_READONLY(mb0) || mb0->m_len < sizeof(struct ip6_hdr))) 1127 mb0 = m_pullup(mb0, sizeof(struct ip6_hdr)); 1128 if (mb0 == NULL) { 1129 free(rte, M_MRTABLE); 1130 splx(s); 1131 return ENOBUFS; 1132 } 1133 1134 /* is there an upcall waiting for this packet? */ 1135 hash = MF6CHASH(ip6->ip6_src, ip6->ip6_dst); 1136 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 1137 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, 1138 &rt->mf6c_origin.sin6_addr) && 1139 IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, 1140 &rt->mf6c_mcastgrp.sin6_addr) && 1141 (rt->mf6c_stall != NULL)) 1142 break; 1143 } 1144 1145 if (rt == NULL) { 1146 struct mrt6msg *im; 1147 struct omrt6msg *oim; 1148 1149 /* no upcall, so make a new entry */ 1150 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE, 1151 M_NOWAIT); 1152 if (rt == NULL) { 1153 free(rte, M_MRTABLE); 1154 m_freem(mb0); 1155 splx(s); 1156 return ENOBUFS; 1157 } 1158 /* 1159 * Make a copy of the header to send to the user 1160 * level process 1161 */ 1162 mm = m_copy(mb0, 0, sizeof(struct ip6_hdr)); 1163 1164 if (mm == NULL) { 1165 free(rte, M_MRTABLE); 1166 m_freem(mb0); 1167 free(rt, M_MRTABLE); 1168 splx(s); 1169 return ENOBUFS; 1170 } 1171 1172 /* 1173 * Send message to routing daemon 1174 */ 1175 sockaddr_in6_init(&sin6, &ip6->ip6_src, 0, 0, 0); 1176 1177 im = NULL; 1178 oim = NULL; 1179 switch (ip6_mrouter_ver) { 1180 case MRT6_OINIT: 1181 oim = mtod(mm, struct omrt6msg *); 1182 oim->im6_msgtype = MRT6MSG_NOCACHE; 1183 oim->im6_mbz = 0; 1184 break; 1185 case MRT6_INIT: 1186 im = mtod(mm, struct mrt6msg *); 1187 im->im6_msgtype = MRT6MSG_NOCACHE; 1188 im->im6_mbz = 0; 1189 break; 1190 default: 1191 free(rte, M_MRTABLE); 1192 m_freem(mb0); 1193 free(rt, M_MRTABLE); 1194 splx(s); 1195 return EINVAL; 1196 } 1197 1198 #ifdef MRT6DEBUG 1199 if (mrt6debug & DEBUG_FORWARD) 1200 log(LOG_DEBUG, 1201 "getting the iif info in the kernel\n"); 1202 #endif 1203 1204 for (mifp = mif6table, mifi = 0; 1205 mifi < nummifs && mifp->m6_ifp != ifp; 1206 mifp++, mifi++) 1207 ; 1208 1209 switch (ip6_mrouter_ver) { 1210 case MRT6_OINIT: 1211 oim->im6_mif = mifi; 1212 break; 1213 case MRT6_INIT: 1214 im->im6_mif = mifi; 1215 break; 1216 } 1217 1218 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1219 log(LOG_WARNING, "ip6_mforward: ip6_mrouter " 1220 "socket queue full\n"); 1221 mrt6stat.mrt6s_upq_sockfull++; 1222 free(rte, M_MRTABLE); 1223 m_freem(mb0); 1224 free(rt, M_MRTABLE); 1225 splx(s); 1226 return ENOBUFS; 1227 } 1228 1229 mrt6stat.mrt6s_upcalls++; 1230 1231 /* insert new entry at head of hash chain */ 1232 bzero(rt, sizeof(*rt)); 1233 sockaddr_in6_init(&rt->mf6c_origin, &ip6->ip6_src, 1234 0, 0, 0); 1235 sockaddr_in6_init(&rt->mf6c_mcastgrp, &ip6->ip6_dst, 1236 0, 0, 0); 1237 rt->mf6c_expire = UPCALL_EXPIRE; 1238 n6expire[hash]++; 1239 rt->mf6c_parent = MF6C_INCOMPLETE_PARENT; 1240 1241 /* link into table */ 1242 rt->mf6c_next = mf6ctable[hash]; 1243 mf6ctable[hash] = rt; 1244 /* Add this entry to the end of the queue */ 1245 rt->mf6c_stall = rte; 1246 } else { 1247 /* determine if q has overflowed */ 1248 struct rtdetq **p; 1249 int npkts = 0; 1250 1251 for (p = &rt->mf6c_stall; *p != NULL; p = &(*p)->next) 1252 if (++npkts > MAX_UPQ6) { 1253 mrt6stat.mrt6s_upq_ovflw++; 1254 free(rte, M_MRTABLE); 1255 m_freem(mb0); 1256 splx(s); 1257 return 0; 1258 } 1259 1260 /* Add this entry to the end of the queue */ 1261 *p = rte; 1262 } 1263 1264 rte->next = NULL; 1265 rte->m = mb0; 1266 rte->ifp = ifp; 1267 #ifdef UPCALL_TIMING 1268 rte->t = tp; 1269 #endif /* UPCALL_TIMING */ 1270 1271 splx(s); 1272 1273 return 0; 1274 } 1275 } 1276 1277 /* 1278 * Clean up cache entries if upcalls are not serviced 1279 * Call from the Slow Timeout mechanism, every 0.25 seconds. 1280 */ 1281 static void 1282 expire_upcalls(void *unused) 1283 { 1284 struct rtdetq *rte; 1285 struct mf6c *mfc, **nptr; 1286 int i; 1287 int s; 1288 1289 s = splsoftnet(); 1290 for (i = 0; i < MF6CTBLSIZ; i++) { 1291 if (n6expire[i] == 0) 1292 continue; 1293 nptr = &mf6ctable[i]; 1294 while ((mfc = *nptr) != NULL) { 1295 rte = mfc->mf6c_stall; 1296 /* 1297 * Skip real cache entries 1298 * Make sure it wasn't marked to not expire (shouldn't happen) 1299 * If it expires now 1300 */ 1301 if (rte != NULL && 1302 mfc->mf6c_expire != 0 && 1303 --mfc->mf6c_expire == 0) { 1304 #ifdef MRT6DEBUG 1305 if (mrt6debug & DEBUG_EXPIRE) 1306 log(LOG_DEBUG, "expire_upcalls: expiring (%s %s)\n", 1307 ip6_sprintf(&mfc->mf6c_origin.sin6_addr), 1308 ip6_sprintf(&mfc->mf6c_mcastgrp.sin6_addr)); 1309 #endif 1310 /* 1311 * drop all the packets 1312 * free the mbuf with the pkt, if, timing info 1313 */ 1314 do { 1315 struct rtdetq *n = rte->next; 1316 m_freem(rte->m); 1317 free(rte, M_MRTABLE); 1318 rte = n; 1319 } while (rte != NULL); 1320 mrt6stat.mrt6s_cache_cleanups++; 1321 n6expire[i]--; 1322 1323 *nptr = mfc->mf6c_next; 1324 free(mfc, M_MRTABLE); 1325 } else { 1326 nptr = &mfc->mf6c_next; 1327 } 1328 } 1329 } 1330 splx(s); 1331 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 1332 expire_upcalls, NULL); 1333 } 1334 1335 /* 1336 * Packet forwarding routine once entry in the cache is made 1337 */ 1338 static int 1339 ip6_mdq(struct mbuf *m, struct ifnet *ifp, struct mf6c *rt) 1340 { 1341 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 1342 mifi_t mifi, iif; 1343 struct mif6 *mifp; 1344 int plen = m->m_pkthdr.len; 1345 struct in6_addr src0, dst0; /* copies for local work */ 1346 u_int32_t iszone, idzone, oszone, odzone; 1347 int error = 0; 1348 1349 /* 1350 * Macro to send packet on mif. Since RSVP packets don't get counted on 1351 * input, they shouldn't get counted on output, so statistics keeping is 1352 * separate. 1353 */ 1354 1355 #define MC6_SEND(ip6, mifp, m) do { \ 1356 if ((mifp)->m6_flags & MIFF_REGISTER) \ 1357 register_send((ip6), (mifp), (m)); \ 1358 else \ 1359 phyint_send((ip6), (mifp), (m)); \ 1360 } while (/*CONSTCOND*/ 0) 1361 1362 /* 1363 * Don't forward if it didn't arrive from the parent mif 1364 * for its origin. 1365 */ 1366 mifi = rt->mf6c_parent; 1367 if ((mifi >= nummifs) || (mif6table[mifi].m6_ifp != ifp)) { 1368 /* came in the wrong interface */ 1369 #ifdef MRT6DEBUG 1370 if (mrt6debug & DEBUG_FORWARD) 1371 log(LOG_DEBUG, 1372 "wrong if: ifid %d mifi %d mififid %x\n", 1373 ifp->if_index, mifi, 1374 mif6table[mifi].m6_ifp ? 1375 mif6table[mifi].m6_ifp->if_index : -1); 1376 #endif 1377 mrt6stat.mrt6s_wrong_if++; 1378 rt->mf6c_wrong_if++; 1379 /* 1380 * If we are doing PIM processing, and we are forwarding 1381 * packets on this interface, send a message to the 1382 * routing daemon. 1383 */ 1384 /* have to make sure this is a valid mif */ 1385 if (mifi < nummifs && mif6table[mifi].m6_ifp) 1386 if (pim6 && (m->m_flags & M_LOOP) == 0) { 1387 /* 1388 * Check the M_LOOP flag to avoid an 1389 * unnecessary PIM assert. 1390 * XXX: M_LOOP is an ad-hoc hack... 1391 */ 1392 struct sockaddr_in6 sin6; 1393 1394 struct mbuf *mm; 1395 struct mrt6msg *im; 1396 struct omrt6msg *oim; 1397 1398 mm = m_copy(m, 0, sizeof(struct ip6_hdr)); 1399 if (mm && 1400 (M_READONLY(mm) || 1401 mm->m_len < sizeof(struct ip6_hdr))) 1402 mm = m_pullup(mm, sizeof(struct ip6_hdr)); 1403 if (mm == NULL) 1404 return ENOBUFS; 1405 1406 oim = NULL; 1407 im = NULL; 1408 switch (ip6_mrouter_ver) { 1409 case MRT6_OINIT: 1410 oim = mtod(mm, struct omrt6msg *); 1411 oim->im6_msgtype = MRT6MSG_WRONGMIF; 1412 oim->im6_mbz = 0; 1413 break; 1414 case MRT6_INIT: 1415 im = mtod(mm, struct mrt6msg *); 1416 im->im6_msgtype = MRT6MSG_WRONGMIF; 1417 im->im6_mbz = 0; 1418 break; 1419 default: 1420 m_freem(mm); 1421 return EINVAL; 1422 } 1423 1424 for (mifp = mif6table, iif = 0; 1425 iif < nummifs && mifp && 1426 mifp->m6_ifp != ifp; 1427 mifp++, iif++) 1428 ; 1429 1430 bzero(&sin6, sizeof(sin6)); 1431 sin6.sin6_len = sizeof(sin6); 1432 sin6.sin6_family = AF_INET6; 1433 switch (ip6_mrouter_ver) { 1434 case MRT6_OINIT: 1435 oim->im6_mif = iif; 1436 sin6.sin6_addr = oim->im6_src; 1437 break; 1438 case MRT6_INIT: 1439 im->im6_mif = iif; 1440 sin6.sin6_addr = im->im6_src; 1441 break; 1442 } 1443 1444 mrt6stat.mrt6s_upcalls++; 1445 1446 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1447 #ifdef MRT6DEBUG 1448 if (mrt6debug) 1449 log(LOG_WARNING, "mdq, ip6_mrouter socket queue full\n"); 1450 #endif 1451 ++mrt6stat.mrt6s_upq_sockfull; 1452 return ENOBUFS; 1453 } /* if socket Q full */ 1454 } /* if PIM */ 1455 return 0; 1456 } /* if wrong iif */ 1457 1458 /* If I sourced this packet, it counts as output, else it was input. */ 1459 if (m->m_pkthdr.rcvif == NULL) { 1460 /* XXX: is rcvif really NULL when output?? */ 1461 mif6table[mifi].m6_pkt_out++; 1462 mif6table[mifi].m6_bytes_out += plen; 1463 } else { 1464 mif6table[mifi].m6_pkt_in++; 1465 mif6table[mifi].m6_bytes_in += plen; 1466 } 1467 rt->mf6c_pkt_cnt++; 1468 rt->mf6c_byte_cnt += plen; 1469 1470 /* 1471 * For each mif, forward a copy of the packet if there are group 1472 * members downstream on the interface. 1473 */ 1474 src0 = ip6->ip6_src; 1475 dst0 = ip6->ip6_dst; 1476 if ((error = in6_setscope(&src0, ifp, &iszone)) != 0 || 1477 (error = in6_setscope(&dst0, ifp, &idzone)) != 0) { 1478 ip6stat.ip6s_badscope++; 1479 return (error); 1480 } 1481 for (mifp = mif6table, mifi = 0; mifi < nummifs; mifp++, mifi++) 1482 if (IF_ISSET(mifi, &rt->mf6c_ifset)) { 1483 if (mif6table[mifi].m6_ifp == NULL) 1484 continue; 1485 /* 1486 * check if the outgoing packet is going to break 1487 * a scope boundary. 1488 * XXX: For packets through PIM register tunnel 1489 * interface, we believe the routing daemon. 1490 */ 1491 if ((mif6table[rt->mf6c_parent].m6_flags & 1492 MIFF_REGISTER) == 0 && 1493 (mif6table[mifi].m6_flags & MIFF_REGISTER) == 0) { 1494 if (in6_setscope(&src0, mif6table[mifi].m6_ifp, 1495 &oszone) || 1496 in6_setscope(&dst0, mif6table[mifi].m6_ifp, 1497 &odzone) || 1498 iszone != oszone || idzone != odzone) { 1499 ip6stat.ip6s_badscope++; 1500 continue; 1501 } 1502 } 1503 1504 mifp->m6_pkt_out++; 1505 mifp->m6_bytes_out += plen; 1506 MC6_SEND(ip6, mifp, m); 1507 } 1508 return 0; 1509 } 1510 1511 static void 1512 phyint_send(struct ip6_hdr *ip6, struct mif6 *mifp, struct mbuf *m) 1513 { 1514 struct mbuf *mb_copy; 1515 struct ifnet *ifp = mifp->m6_ifp; 1516 int error = 0; 1517 int s; 1518 static struct route ro; 1519 struct in6_multi *in6m; 1520 struct sockaddr_in6 dst6; 1521 u_long linkmtu; 1522 1523 s = splsoftnet(); 1524 /* 1525 * Make a new reference to the packet; make sure that 1526 * the IPv6 header is actually copied, not just referenced, 1527 * so that ip6_output() only scribbles on the copy. 1528 */ 1529 mb_copy = m_copy(m, 0, M_COPYALL); 1530 if (mb_copy && 1531 (M_READONLY(mb_copy) || mb_copy->m_len < sizeof(struct ip6_hdr))) 1532 mb_copy = m_pullup(mb_copy, sizeof(struct ip6_hdr)); 1533 if (mb_copy == NULL) { 1534 splx(s); 1535 return; 1536 } 1537 /* set MCAST flag to the outgoing packet */ 1538 mb_copy->m_flags |= M_MCAST; 1539 1540 /* 1541 * If we sourced the packet, call ip6_output since we may divide 1542 * the packet into fragments when the packet is too big for the 1543 * outgoing interface. 1544 * Otherwise, we can simply send the packet to the interface 1545 * sending queue. 1546 */ 1547 if (m->m_pkthdr.rcvif == NULL) { 1548 struct ip6_moptions im6o; 1549 1550 im6o.im6o_multicast_ifp = ifp; 1551 /* XXX: ip6_output will override ip6->ip6_hlim */ 1552 im6o.im6o_multicast_hlim = ip6->ip6_hlim; 1553 im6o.im6o_multicast_loop = 1; 1554 error = ip6_output(mb_copy, NULL, &ro, IPV6_FORWARDING, 1555 &im6o, NULL, NULL); 1556 1557 #ifdef MRT6DEBUG 1558 if (mrt6debug & DEBUG_XMIT) 1559 log(LOG_DEBUG, "phyint_send on mif %d err %d\n", 1560 mifp - mif6table, error); 1561 #endif 1562 splx(s); 1563 return; 1564 } 1565 1566 /* 1567 * If we belong to the destination multicast group 1568 * on the outgoing interface, loop back a copy. 1569 */ 1570 /* 1571 * Does not have to check source info, as it's alreay covered by 1572 * ip6_input 1573 */ 1574 sockaddr_in6_init(&dst6, &ip6->ip6_dst, 0, 0, 0); 1575 1576 IN6_LOOKUP_MULTI(ip6->ip6_dst, ifp, in6m); 1577 if (in6m != NULL) { 1578 ip6_mloopback(ifp, m, 1579 satocsin6(rtcache_getdst(&ro))); 1580 } 1581 1582 /* 1583 * Put the packet into the sending queue of the outgoing interface 1584 * if it would fit in the MTU of the interface. 1585 */ 1586 linkmtu = IN6_LINKMTU(ifp); 1587 if (mb_copy->m_pkthdr.len <= linkmtu || linkmtu < IPV6_MMTU) { 1588 /* 1589 * We could call if_output directly here, but we use 1590 * nd6_output on purpose to see if IPv6 operation is allowed 1591 * on the interface. 1592 */ 1593 error = nd6_output(ifp, ifp, mb_copy, &dst6, NULL); 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 } else { 1600 /* 1601 * pMTU discovery is intentionally disabled by default, since 1602 * various router may notify pMTU in multicast, which can be 1603 * a DDoS to a router 1604 */ 1605 if (ip6_mcast_pmtu) 1606 icmp6_error(mb_copy, ICMP6_PACKET_TOO_BIG, 0, linkmtu); 1607 else { 1608 #ifdef MRT6DEBUG 1609 if (mrt6debug & DEBUG_XMIT) 1610 log(LOG_DEBUG, 1611 "phyint_send: packet too big on %s o %s g %s" 1612 " size %d(discarded)\n", 1613 if_name(ifp), 1614 ip6_sprintf(&ip6->ip6_src), 1615 ip6_sprintf(&ip6->ip6_dst), 1616 mb_copy->m_pkthdr.len); 1617 #endif /* MRT6DEBUG */ 1618 m_freem(mb_copy); /* simply discard the packet */ 1619 } 1620 } 1621 1622 splx(s); 1623 } 1624 1625 static int 1626 register_send(struct ip6_hdr *ip6, struct mif6 *mif, struct mbuf *m) 1627 { 1628 struct mbuf *mm; 1629 int i, len = m->m_pkthdr.len; 1630 struct sockaddr_in6 sin6; 1631 struct mrt6msg *im6; 1632 1633 #ifdef MRT6DEBUG 1634 if (mrt6debug) 1635 log(LOG_DEBUG, "** IPv6 register_send **\n src %s dst %s\n", 1636 ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst)); 1637 #endif 1638 ++pim6stat.pim6s_snd_registers; 1639 1640 /* Make a copy of the packet to send to the user level process */ 1641 MGETHDR(mm, M_DONTWAIT, MT_HEADER); 1642 if (mm == NULL) 1643 return ENOBUFS; 1644 mm->m_data += max_linkhdr; 1645 mm->m_len = sizeof(struct ip6_hdr); 1646 1647 if ((mm->m_next = m_copy(m, 0, M_COPYALL)) == NULL) { 1648 m_freem(mm); 1649 return ENOBUFS; 1650 } 1651 i = MHLEN - M_LEADINGSPACE(mm); 1652 if (i > len) 1653 i = len; 1654 mm = m_pullup(mm, i); 1655 if (mm == NULL) 1656 return ENOBUFS; 1657 /* TODO: check it! */ 1658 mm->m_pkthdr.len = len + sizeof(struct ip6_hdr); 1659 1660 /* 1661 * Send message to routing daemon 1662 */ 1663 sockaddr_in6_init(&sin6, &ip6->ip6_src, 0, 0, 0); 1664 1665 im6 = mtod(mm, struct mrt6msg *); 1666 im6->im6_msgtype = MRT6MSG_WHOLEPKT; 1667 im6->im6_mbz = 0; 1668 1669 im6->im6_mif = mif - mif6table; 1670 1671 /* iif info is not given for reg. encap.n */ 1672 mrt6stat.mrt6s_upcalls++; 1673 1674 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1675 #ifdef MRT6DEBUG 1676 if (mrt6debug) 1677 log(LOG_WARNING, 1678 "register_send: ip6_mrouter socket queue full\n"); 1679 #endif 1680 ++mrt6stat.mrt6s_upq_sockfull; 1681 return ENOBUFS; 1682 } 1683 return 0; 1684 } 1685 1686 /* 1687 * PIM sparse mode hook 1688 * Receives the pim control messages, and passes them up to the listening 1689 * socket, using rip6_input. 1690 * The only message processed is the REGISTER pim message; the pim header 1691 * is stripped off, and the inner packet is passed to register_mforward. 1692 */ 1693 int 1694 pim6_input(struct mbuf **mp, int *offp, int proto) 1695 { 1696 struct pim *pim; /* pointer to a pim struct */ 1697 struct ip6_hdr *ip6; 1698 int pimlen; 1699 struct mbuf *m = *mp; 1700 int minlen; 1701 int off = *offp; 1702 1703 ++pim6stat.pim6s_rcv_total; 1704 1705 ip6 = mtod(m, struct ip6_hdr *); 1706 pimlen = m->m_pkthdr.len - *offp; 1707 1708 /* 1709 * Validate lengths 1710 */ 1711 if (pimlen < PIM_MINLEN) { 1712 ++pim6stat.pim6s_rcv_tooshort; 1713 #ifdef MRT6DEBUG 1714 if (mrt6debug & DEBUG_PIM) 1715 log(LOG_DEBUG,"pim6_input: PIM packet too short\n"); 1716 #endif 1717 m_freem(m); 1718 return (IPPROTO_DONE); 1719 } 1720 1721 /* 1722 * if the packet is at least as big as a REGISTER, go ahead 1723 * and grab the PIM REGISTER header size, to avoid another 1724 * possible m_pullup() later. 1725 * 1726 * PIM_MINLEN == pimhdr + u_int32 == 8 1727 * PIM6_REG_MINLEN == pimhdr + reghdr + eip6hdr == 4 + 4 + 40 1728 */ 1729 minlen = (pimlen >= PIM6_REG_MINLEN) ? PIM6_REG_MINLEN : PIM_MINLEN; 1730 1731 /* 1732 * Make sure that the IP6 and PIM headers in contiguous memory, and 1733 * possibly the PIM REGISTER header 1734 */ 1735 IP6_EXTHDR_GET(pim, struct pim *, m, off, minlen); 1736 if (pim == NULL) { 1737 pim6stat.pim6s_rcv_tooshort++; 1738 return IPPROTO_DONE; 1739 } 1740 1741 /* PIM version check */ 1742 if (pim->pim_ver != PIM_VERSION) { 1743 ++pim6stat.pim6s_rcv_badversion; 1744 #ifdef MRT6DEBUG 1745 log(LOG_ERR, 1746 "pim6_input: incorrect version %d, expecting %d\n", 1747 pim->pim_ver, PIM_VERSION); 1748 #endif 1749 m_freem(m); 1750 return (IPPROTO_DONE); 1751 } 1752 1753 #define PIM6_CHECKSUM 1754 #ifdef PIM6_CHECKSUM 1755 { 1756 int cksumlen; 1757 1758 /* 1759 * Validate checksum. 1760 * If PIM REGISTER, exclude the data packet 1761 */ 1762 if (pim->pim_type == PIM_REGISTER) 1763 cksumlen = PIM_MINLEN; 1764 else 1765 cksumlen = pimlen; 1766 1767 if (in6_cksum(m, IPPROTO_PIM, off, cksumlen)) { 1768 ++pim6stat.pim6s_rcv_badsum; 1769 #ifdef MRT6DEBUG 1770 if (mrt6debug & DEBUG_PIM) 1771 log(LOG_DEBUG, 1772 "pim6_input: invalid checksum\n"); 1773 #endif 1774 m_freem(m); 1775 return (IPPROTO_DONE); 1776 } 1777 } 1778 #endif /* PIM_CHECKSUM */ 1779 1780 if (pim->pim_type == PIM_REGISTER) { 1781 /* 1782 * since this is a REGISTER, we'll make a copy of the register 1783 * headers ip6+pim+u_int32_t+encap_ip6, to be passed up to the 1784 * routing daemon. 1785 */ 1786 static const struct sockaddr_in6 dst = { 1787 .sin6_len = sizeof(dst), 1788 .sin6_family = AF_INET6, 1789 }; 1790 1791 struct mbuf *mcp; 1792 struct ip6_hdr *eip6; 1793 u_int32_t *reghdr; 1794 1795 ++pim6stat.pim6s_rcv_registers; 1796 1797 if ((reg_mif_num >= nummifs) || (reg_mif_num == (mifi_t) -1)) { 1798 #ifdef MRT6DEBUG 1799 if (mrt6debug & DEBUG_PIM) 1800 log(LOG_DEBUG, 1801 "pim6_input: register mif not set: %d\n", 1802 reg_mif_num); 1803 #endif 1804 m_freem(m); 1805 return (IPPROTO_DONE); 1806 } 1807 1808 reghdr = (u_int32_t *)(pim + 1); 1809 1810 if ((ntohl(*reghdr) & PIM_NULL_REGISTER)) 1811 goto pim6_input_to_daemon; 1812 1813 /* 1814 * Validate length 1815 */ 1816 if (pimlen < PIM6_REG_MINLEN) { 1817 ++pim6stat.pim6s_rcv_tooshort; 1818 ++pim6stat.pim6s_rcv_badregisters; 1819 #ifdef MRT6DEBUG 1820 log(LOG_ERR, 1821 "pim6_input: register packet size too " 1822 "small %d from %s\n", 1823 pimlen, ip6_sprintf(&ip6->ip6_src)); 1824 #endif 1825 m_freem(m); 1826 return (IPPROTO_DONE); 1827 } 1828 1829 eip6 = (struct ip6_hdr *) (reghdr + 1); 1830 #ifdef MRT6DEBUG 1831 if (mrt6debug & DEBUG_PIM) 1832 log(LOG_DEBUG, 1833 "pim6_input[register], eip6: %s -> %s, " 1834 "eip6 plen %d\n", 1835 ip6_sprintf(&eip6->ip6_src), 1836 ip6_sprintf(&eip6->ip6_dst), 1837 ntohs(eip6->ip6_plen)); 1838 #endif 1839 1840 /* verify the version number of the inner packet */ 1841 if ((eip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) { 1842 ++pim6stat.pim6s_rcv_badregisters; 1843 #ifdef MRT6DEBUG 1844 log(LOG_DEBUG, "pim6_input: invalid IP version (%d) " 1845 "of the inner packet\n", 1846 (eip6->ip6_vfc & IPV6_VERSION)); 1847 #endif 1848 m_freem(m); 1849 return (IPPROTO_NONE); 1850 } 1851 1852 /* verify the inner packet is destined to a mcast group */ 1853 if (!IN6_IS_ADDR_MULTICAST(&eip6->ip6_dst)) { 1854 ++pim6stat.pim6s_rcv_badregisters; 1855 #ifdef MRT6DEBUG 1856 if (mrt6debug & DEBUG_PIM) 1857 log(LOG_DEBUG, 1858 "pim6_input: inner packet of register " 1859 "is not multicast %s\n", 1860 ip6_sprintf(&eip6->ip6_dst)); 1861 #endif 1862 m_freem(m); 1863 return (IPPROTO_DONE); 1864 } 1865 1866 /* 1867 * make a copy of the whole header to pass to the daemon later. 1868 */ 1869 mcp = m_copy(m, 0, off + PIM6_REG_MINLEN); 1870 if (mcp == NULL) { 1871 #ifdef MRT6DEBUG 1872 log(LOG_ERR, 1873 "pim6_input: pim register: " 1874 "could not copy register head\n"); 1875 #endif 1876 m_freem(m); 1877 return (IPPROTO_DONE); 1878 } 1879 1880 /* 1881 * forward the inner ip6 packet; point m_data at the inner ip6. 1882 */ 1883 m_adj(m, off + PIM_MINLEN); 1884 #ifdef MRT6DEBUG 1885 if (mrt6debug & DEBUG_PIM) { 1886 log(LOG_DEBUG, 1887 "pim6_input: forwarding decapsulated register: " 1888 "src %s, dst %s, mif %d\n", 1889 ip6_sprintf(&eip6->ip6_src), 1890 ip6_sprintf(&eip6->ip6_dst), 1891 reg_mif_num); 1892 } 1893 #endif 1894 1895 looutput(mif6table[reg_mif_num].m6_ifp, m, 1896 (struct sockaddr *)__UNCONST(&dst), 1897 (struct rtentry *) NULL); 1898 1899 /* prepare the register head to send to the mrouting daemon */ 1900 m = mcp; 1901 } 1902 1903 /* 1904 * Pass the PIM message up to the daemon; if it is a register message 1905 * pass the 'head' only up to the daemon. This includes the 1906 * encapsulator ip6 header, pim header, register header and the 1907 * encapsulated ip6 header. 1908 */ 1909 pim6_input_to_daemon: 1910 rip6_input(&m, offp, proto); 1911 return (IPPROTO_DONE); 1912 } 1913 1914 SYSCTL_SETUP(sysctl_net_inet6_pim6_setup, "sysctl net.inet6.pim6 subtree setup") 1915 { 1916 sysctl_createv(clog, 0, NULL, NULL, 1917 CTLFLAG_PERMANENT, 1918 CTLTYPE_NODE, "net", NULL, 1919 NULL, 0, NULL, 0, 1920 CTL_NET, CTL_EOL); 1921 sysctl_createv(clog, 0, NULL, NULL, 1922 CTLFLAG_PERMANENT, 1923 CTLTYPE_NODE, "inet6", NULL, 1924 NULL, 0, NULL, 0, 1925 CTL_NET, PF_INET6, CTL_EOL); 1926 sysctl_createv(clog, 0, NULL, NULL, 1927 CTLFLAG_PERMANENT, 1928 CTLTYPE_NODE, "pim6", 1929 SYSCTL_DESCR("PIMv6 settings"), 1930 NULL, 0, NULL, 0, 1931 CTL_NET, PF_INET6, IPPROTO_PIM, CTL_EOL); 1932 1933 sysctl_createv(clog, 0, NULL, NULL, 1934 CTLFLAG_PERMANENT, 1935 CTLTYPE_STRUCT, "stats", 1936 SYSCTL_DESCR("PIMv6 statistics"), 1937 NULL, 0, &pim6stat, sizeof(pim6stat), 1938 CTL_NET, PF_INET6, IPPROTO_PIM, PIM6CTL_STATS, 1939 CTL_EOL); 1940 } 1941
Indexes created Tue Sep 23 07:09:52 GMT 2025