1 /* $NetBSD: ip6_mroute.c,v 1.127 2018/05/01 07:21:39 maxv 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 1.127 2018/05/01 07:21:39 maxv Exp $"); 121 122 #ifdef _KERNEL_OPT 123 #include "opt_inet.h" 124 #include "opt_mrouting.h" 125 #endif 126 127 #include <sys/param.h> 128 #include <sys/systm.h> 129 #include <sys/callout.h> 130 #include <sys/mbuf.h> 131 #include <sys/socket.h> 132 #include <sys/socketvar.h> 133 #include <sys/sockio.h> 134 #include <sys/errno.h> 135 #include <sys/time.h> 136 #include <sys/kernel.h> 137 #include <sys/ioctl.h> 138 #include <sys/sysctl.h> 139 #include <sys/syslog.h> 140 141 #include <net/if.h> 142 #include <net/route.h> 143 #include <net/raw_cb.h> 144 #include <net/net_stats.h> 145 146 #include <netinet/in.h> 147 #include <netinet/in_var.h> 148 #include <netinet/icmp6.h> 149 150 #include <netinet/ip6.h> 151 #include <netinet6/ip6_var.h> 152 #include <netinet6/ip6_private.h> 153 #include <netinet6/ip6_mroute.h> 154 #include <netinet6/scope6_var.h> 155 #include <netinet6/pim6.h> 156 #include <netinet6/pim6_var.h> 157 #include <netinet6/nd6.h> 158 159 static int ip6_mdq(struct mbuf *, struct ifnet *, struct mf6c *); 160 static void phyint_send(struct ip6_hdr *, struct mif6 *, struct mbuf *); 161 162 static int set_pim6(int *); 163 static int socket_send(struct socket *, struct mbuf *, struct sockaddr_in6 *); 164 static int register_send(struct ip6_hdr *, struct mif6 *, struct mbuf *); 165 166 /* 167 * Globals. All but ip6_mrouter, ip6_mrtproto and mrt6stat could be static, 168 * except for netstat or debugging purposes. 169 */ 170 struct socket *ip6_mrouter = NULL; 171 int ip6_mrouter_ver = 0; 172 int ip6_mrtproto = IPPROTO_PIM; /* for netstat only */ 173 struct mrt6stat mrt6stat; 174 175 #define NO_RTE_FOUND 0x1 176 #define RTE_FOUND 0x2 177 178 struct mf6c *mf6ctable[MF6CTBLSIZ]; 179 u_char n6expire[MF6CTBLSIZ]; 180 struct mif6 mif6table[MAXMIFS]; 181 #ifdef MRT6DEBUG 182 u_int mrt6debug = 0; /* debug level */ 183 #define DEBUG_MFC 0x02 184 #define DEBUG_FORWARD 0x04 185 #define DEBUG_EXPIRE 0x08 186 #define DEBUG_XMIT 0x10 187 #define DEBUG_REG 0x20 188 #define DEBUG_PIM 0x40 189 #define __mrt6debugused /* empty */ 190 #else 191 #define __mrt6debugused __unused 192 #endif 193 194 static void expire_upcalls(void *); 195 #define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */ 196 #define UPCALL_EXPIRE 6 /* number of timeouts */ 197 198 #ifdef INET 199 #ifdef MROUTING 200 extern struct socket *ip_mrouter; 201 #endif 202 #endif 203 204 /* 205 * 'Interfaces' associated with decapsulator (so we can tell 206 * packets that went through it from ones that get reflected 207 * by a broken gateway). These interfaces are never linked into 208 * the system ifnet list & no routes point to them. I.e., packets 209 * can't be sent this way. They only exist as a placeholder for 210 * multicast source verification. 211 */ 212 struct ifnet multicast_register_if6; 213 214 #define ENCAP_HOPS 64 215 216 /* 217 * Private variables. 218 */ 219 static mifi_t nummifs = 0; 220 static mifi_t reg_mif_num = (mifi_t)-1; 221 222 static percpu_t *pim6stat_percpu; 223 224 #define PIM6_STATINC(x) _NET_STATINC(pim6stat_percpu, x) 225 226 static int pim6; 227 228 /* 229 * Hash function for a source, group entry 230 */ 231 #define MF6CHASH(a, g) MF6CHASHMOD((a).s6_addr32[0] ^ (a).s6_addr32[1] ^ \ 232 (a).s6_addr32[2] ^ (a).s6_addr32[3] ^ \ 233 (g).s6_addr32[0] ^ (g).s6_addr32[1] ^ \ 234 (g).s6_addr32[2] ^ (g).s6_addr32[3]) 235 236 /* 237 * Find a route for a given origin IPv6 address and Multicast group address. 238 * Quality of service parameter to be added in the future!!! 239 */ 240 241 #define MF6CFIND(o, g, rt) do { \ 242 struct mf6c *_rt = mf6ctable[MF6CHASH(o,g)]; \ 243 rt = NULL; \ 244 mrt6stat.mrt6s_mfc_lookups++; \ 245 while (_rt) { \ 246 if (IN6_ARE_ADDR_EQUAL(&_rt->mf6c_origin.sin6_addr, &(o)) && \ 247 IN6_ARE_ADDR_EQUAL(&_rt->mf6c_mcastgrp.sin6_addr, &(g)) && \ 248 (_rt->mf6c_stall == NULL)) { \ 249 rt = _rt; \ 250 break; \ 251 } \ 252 _rt = _rt->mf6c_next; \ 253 } \ 254 if (rt == NULL) { \ 255 mrt6stat.mrt6s_mfc_misses++; \ 256 } \ 257 } while (/*CONSTCOND*/ 0) 258 259 /* 260 * Macros to compute elapsed time efficiently 261 * Borrowed from Van Jacobson's scheduling code 262 */ 263 #define TV_DELTA(a, b, delta) do { \ 264 int xxs; \ 265 \ 266 delta = (a).tv_usec - (b).tv_usec; \ 267 if ((xxs = (a).tv_sec - (b).tv_sec)) { \ 268 switch (xxs) { \ 269 case 2: \ 270 delta += 1000000; \ 271 /* FALLTHROUGH */ \ 272 case 1: \ 273 delta += 1000000; \ 274 break; \ 275 default: \ 276 delta += (1000000 * xxs); \ 277 } \ 278 } \ 279 } while (/*CONSTCOND*/ 0) 280 281 #define TV_LT(a, b) (((a).tv_usec < (b).tv_usec && \ 282 (a).tv_sec <= (b).tv_sec) || (a).tv_sec < (b).tv_sec) 283 284 #ifdef UPCALL_TIMING 285 #define UPCALL_MAX 50 286 u_long upcall_data[UPCALL_MAX + 1]; 287 static void collate(); 288 #endif /* UPCALL_TIMING */ 289 290 static int get_sg_cnt(struct sioc_sg_req6 *); 291 static int get_mif6_cnt(struct sioc_mif_req6 *); 292 static int ip6_mrouter_init(struct socket *, int, int); 293 static int add_m6if(struct mif6ctl *); 294 static int del_m6if(mifi_t *); 295 static int add_m6fc(struct mf6cctl *); 296 static int del_m6fc(struct mf6cctl *); 297 static void sysctl_net_inet6_pim6_setup(struct sysctllog **); 298 299 static callout_t expire_upcalls_ch; 300 301 void 302 pim6_init(void) 303 { 304 305 sysctl_net_inet6_pim6_setup(NULL); 306 pim6stat_percpu = percpu_alloc(sizeof(uint64_t) * PIM6_NSTATS); 307 } 308 309 /* 310 * Handle MRT setsockopt commands to modify the multicast routing tables. 311 */ 312 int 313 ip6_mrouter_set(struct socket *so, struct sockopt *sopt) 314 { 315 int error, optval; 316 struct mif6ctl mifc; 317 struct mf6cctl mfcc; 318 mifi_t mifi; 319 320 if (sopt->sopt_name != MRT6_INIT && so != ip6_mrouter) 321 return (EACCES); 322 323 error = 0; 324 325 switch (sopt->sopt_name) { 326 #ifdef MRT6_OINIT 327 case MRT6_OINIT: 328 #endif 329 case MRT6_INIT: 330 error = sockopt_getint(sopt, &optval); 331 if (error) 332 break; 333 return (ip6_mrouter_init(so, optval, sopt->sopt_name)); 334 case MRT6_DONE: 335 return (ip6_mrouter_done()); 336 case MRT6_ADD_MIF: 337 error = sockopt_get(sopt, &mifc, sizeof(mifc)); 338 if (error) 339 break; 340 return (add_m6if(&mifc)); 341 case MRT6_DEL_MIF: 342 error = sockopt_get(sopt, &mifi, sizeof(mifi)); 343 if (error) 344 break; 345 return (del_m6if(&mifi)); 346 case MRT6_ADD_MFC: 347 error = sockopt_get(sopt, &mfcc, sizeof(mfcc)); 348 if (error) 349 break; 350 return (add_m6fc(&mfcc)); 351 case MRT6_DEL_MFC: 352 error = sockopt_get(sopt, &mfcc, sizeof(mfcc)); 353 if (error) 354 break; 355 return (del_m6fc(&mfcc)); 356 case MRT6_PIM: 357 error = sockopt_getint(sopt, &optval); 358 if (error) 359 break; 360 return (set_pim6(&optval)); 361 default: 362 error = EOPNOTSUPP; 363 } 364 365 return (error); 366 } 367 368 /* 369 * Handle MRT getsockopt commands 370 */ 371 int 372 ip6_mrouter_get(struct socket *so, struct sockopt *sopt) 373 { 374 int error; 375 376 if (so != ip6_mrouter) 377 return EACCES; 378 379 error = 0; 380 381 switch (sopt->sopt_name) { 382 case MRT6_PIM: 383 error = sockopt_set(sopt, &pim6, sizeof(pim6)); 384 break; 385 default: 386 error = EOPNOTSUPP; 387 break; 388 } 389 390 return (error); 391 } 392 393 /* 394 * Handle ioctl commands to obtain information from the cache 395 */ 396 int 397 mrt6_ioctl(u_long cmd, void *data) 398 { 399 400 switch (cmd) { 401 case SIOCGETSGCNT_IN6: 402 return (get_sg_cnt((struct sioc_sg_req6 *)data)); 403 case SIOCGETMIFCNT_IN6: 404 return (get_mif6_cnt((struct sioc_mif_req6 *)data)); 405 default: 406 return (EINVAL); 407 } 408 } 409 410 /* 411 * returns the packet, byte, rpf-failure count for the source group provided 412 */ 413 static int 414 get_sg_cnt(struct sioc_sg_req6 *req) 415 { 416 struct mf6c *rt; 417 int s; 418 419 s = splsoftnet(); 420 MF6CFIND(req->src.sin6_addr, req->grp.sin6_addr, rt); 421 splx(s); 422 if (rt != NULL) { 423 req->pktcnt = rt->mf6c_pkt_cnt; 424 req->bytecnt = rt->mf6c_byte_cnt; 425 req->wrong_if = rt->mf6c_wrong_if; 426 } else 427 return (ESRCH); 428 #if 0 429 req->pktcnt = req->bytecnt = req->wrong_if = 0xffffffff; 430 #endif 431 432 return 0; 433 } 434 435 /* 436 * returns the input and output packet and byte counts on the mif provided 437 */ 438 static int 439 get_mif6_cnt(struct sioc_mif_req6 *req) 440 { 441 mifi_t mifi = req->mifi; 442 443 if (mifi >= nummifs) 444 return EINVAL; 445 446 req->icount = mif6table[mifi].m6_pkt_in; 447 req->ocount = mif6table[mifi].m6_pkt_out; 448 req->ibytes = mif6table[mifi].m6_bytes_in; 449 req->obytes = mif6table[mifi].m6_bytes_out; 450 451 return 0; 452 } 453 454 static int 455 set_pim6(int *i) 456 { 457 if ((*i != 1) && (*i != 0)) 458 return EINVAL; 459 460 pim6 = *i; 461 462 return 0; 463 } 464 465 /* 466 * Enable multicast routing 467 */ 468 static int 469 ip6_mrouter_init(struct socket *so, int v, int cmd) 470 { 471 #ifdef MRT6DEBUG 472 if (mrt6debug) 473 log(LOG_DEBUG, 474 "ip6_mrouter_init: so_type = %d, pr_protocol = %d\n", 475 so->so_type, so->so_proto->pr_protocol); 476 #endif 477 478 if (so->so_type != SOCK_RAW || 479 so->so_proto->pr_protocol != IPPROTO_ICMPV6) 480 return EOPNOTSUPP; 481 482 if (v != 1) 483 return ENOPROTOOPT; 484 485 if (ip6_mrouter != NULL) 486 return EADDRINUSE; 487 488 ip6_mrouter = so; 489 ip6_mrouter_ver = cmd; 490 491 memset((void *)mf6ctable, 0, sizeof(mf6ctable)); 492 memset((void *)n6expire, 0, sizeof(n6expire)); 493 494 pim6 = 0;/* used for stubbing out/in pim stuff */ 495 496 callout_init(&expire_upcalls_ch, CALLOUT_MPSAFE); 497 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 498 expire_upcalls, NULL); 499 500 #ifdef MRT6DEBUG 501 if (mrt6debug) 502 log(LOG_DEBUG, "ip6_mrouter_init\n"); 503 #endif 504 505 return 0; 506 } 507 508 /* 509 * Disable multicast routing 510 */ 511 int 512 ip6_mrouter_done(void) 513 { 514 mifi_t mifi; 515 int i; 516 struct ifnet *ifp; 517 struct sockaddr_in6 sin6; 518 struct mf6c *rt; 519 struct rtdetq *rte; 520 int s; 521 522 s = splsoftnet(); 523 524 /* 525 * For each phyint in use, disable promiscuous reception of all IPv6 526 * multicasts. 527 */ 528 #ifdef INET 529 #ifdef MROUTING 530 /* 531 * If there is still IPv4 multicast routing daemon, 532 * we remain interfaces to receive all muliticasted packets. 533 * XXX: there may be an interface in which the IPv4 multicast 534 * daemon is not interested... 535 */ 536 if (!ip_mrouter) 537 #endif 538 #endif 539 { 540 for (mifi = 0; mifi < nummifs; mifi++) { 541 if (mif6table[mifi].m6_ifp && 542 !(mif6table[mifi].m6_flags & MIFF_REGISTER)) { 543 sin6.sin6_family = AF_INET6; 544 sin6.sin6_addr = in6addr_any; 545 ifp = mif6table[mifi].m6_ifp; 546 if_mcast_op(ifp, SIOCDELMULTI, 547 sin6tocsa(&sin6)); 548 } 549 } 550 } 551 552 memset((void *)mif6table, 0, 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_freem(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 memset((void *)mf6ctable, 0, 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(struct ifnet *ifp) 605 { 606 struct rtdetq *rte; 607 struct mf6c *mfc; 608 mifi_t mifi; 609 int i; 610 611 if (ip6_mrouter == NULL) 612 return; 613 614 /* 615 * Delete a mif which points to ifp. 616 */ 617 for (mifi = 0; mifi < nummifs; mifi++) 618 if (mif6table[mifi].m6_ifp == ifp) 619 del_m6if(&mifi); 620 621 /* 622 * Clear rte->ifp of cache entries received on ifp. 623 */ 624 for (i = 0; i < MF6CTBLSIZ; i++) { 625 if (n6expire[i] == 0) 626 continue; 627 628 for (mfc = mf6ctable[i]; mfc != NULL; mfc = mfc->mf6c_next) { 629 for (rte = mfc->mf6c_stall; rte != NULL; rte = rte->next) { 630 if (rte->ifp == ifp) 631 rte->ifp = NULL; 632 } 633 } 634 } 635 } 636 637 /* 638 * Add a mif to the mif table 639 */ 640 static int 641 add_m6if(struct mif6ctl *mifcp) 642 { 643 struct mif6 *mifp; 644 struct ifnet *ifp; 645 struct sockaddr_in6 sin6; 646 int error, s; 647 648 if (mifcp->mif6c_mifi >= MAXMIFS) 649 return EINVAL; 650 mifp = mif6table + mifcp->mif6c_mifi; 651 if (mifp->m6_ifp) 652 return EADDRINUSE; /* XXX: is it appropriate? */ 653 if (!mifcp->mif6c_pifi || (ifp = if_byindex(mifcp->mif6c_pifi)) == NULL) 654 return ENXIO; 655 656 if (mifcp->mif6c_flags & MIFF_REGISTER) { 657 ifp = &multicast_register_if6; 658 659 if (reg_mif_num == (mifi_t)-1) { 660 strlcpy(ifp->if_xname, "register_mif", 661 sizeof(ifp->if_xname)); 662 ifp->if_flags |= IFF_LOOPBACK; 663 ifp->if_index = mifcp->mif6c_mifi; 664 reg_mif_num = mifcp->mif6c_mifi; 665 if_attach(ifp); 666 } 667 } else { 668 /* Make sure the interface supports multicast */ 669 if ((ifp->if_flags & IFF_MULTICAST) == 0) 670 return EOPNOTSUPP; 671 672 s = splsoftnet(); 673 /* 674 * Enable promiscuous reception of all IPv6 multicasts 675 * from the interface. 676 */ 677 sin6.sin6_family = AF_INET6; 678 sin6.sin6_addr = in6addr_any; 679 error = if_mcast_op(ifp, SIOCADDMULTI, sin6tosa(&sin6)); 680 splx(s); 681 if (error) 682 return error; 683 } 684 685 s = splsoftnet(); 686 mifp->m6_flags = mifcp->mif6c_flags; 687 mifp->m6_ifp = ifp; 688 #ifdef notyet 689 /* scaling up here allows division by 1024 in critical code */ 690 mifp->m6_rate_limit = mifcp->mif6c_rate_limit * 1024 / 1000; 691 #endif 692 /* initialize per mif pkt counters */ 693 mifp->m6_pkt_in = 0; 694 mifp->m6_pkt_out = 0; 695 mifp->m6_bytes_in = 0; 696 mifp->m6_bytes_out = 0; 697 splx(s); 698 699 /* Adjust nummifs up if the mifi is higher than nummifs */ 700 if (nummifs <= mifcp->mif6c_mifi) 701 nummifs = mifcp->mif6c_mifi + 1; 702 703 #ifdef MRT6DEBUG 704 if (mrt6debug) 705 log(LOG_DEBUG, 706 "add_mif #%d, phyint %s\n", 707 mifcp->mif6c_mifi, ifp->if_xname); 708 #endif 709 710 return 0; 711 } 712 713 /* 714 * Delete a mif from the mif table 715 */ 716 static int 717 del_m6if(mifi_t *mifip) 718 { 719 struct mif6 *mifp = mif6table + *mifip; 720 mifi_t mifi; 721 struct ifnet *ifp; 722 struct sockaddr_in6 sin6; 723 int s; 724 725 if (*mifip >= nummifs) 726 return EINVAL; 727 if (mifp->m6_ifp == NULL) 728 return EINVAL; 729 730 s = splsoftnet(); 731 732 if (!(mifp->m6_flags & MIFF_REGISTER)) { 733 /* 734 * XXX: what if there is yet IPv4 multicast daemon 735 * using the interface? 736 */ 737 ifp = mifp->m6_ifp; 738 739 sin6.sin6_family = AF_INET6; 740 sin6.sin6_addr = in6addr_any; 741 if_mcast_op(ifp, SIOCDELMULTI, sin6tosa(&sin6)); 742 } else { 743 if (reg_mif_num != (mifi_t)-1) { 744 if_detach(&multicast_register_if6); 745 reg_mif_num = (mifi_t)-1; 746 } 747 } 748 749 memset((void *)mifp, 0, sizeof (*mifp)); 750 751 /* Adjust nummifs down */ 752 for (mifi = nummifs; mifi > 0; mifi--) 753 if (mif6table[mifi - 1].m6_ifp) 754 break; 755 nummifs = mifi; 756 757 splx(s); 758 759 #ifdef MRT6DEBUG 760 if (mrt6debug) 761 log(LOG_DEBUG, "del_m6if %d, nummifs %d\n", *mifip, nummifs); 762 #endif 763 764 return 0; 765 } 766 767 /* 768 * Add an mfc entry 769 */ 770 static int 771 add_m6fc(struct mf6cctl *mfccp) 772 { 773 struct mf6c *rt; 774 u_long hash; 775 struct rtdetq *rte; 776 u_short nstl; 777 int s; 778 char ip6bufo[INET6_ADDRSTRLEN], ip6bufm[INET6_ADDRSTRLEN]; 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 IN6_PRINT(ip6bufo, 789 &mfccp->mf6cc_origin.sin6_addr), 790 IN6_PRINT(ip6bufm, 791 &mfccp->mf6cc_mcastgrp.sin6_addr), 792 mfccp->mf6cc_parent); 793 #endif 794 795 s = splsoftnet(); 796 rt->mf6c_parent = mfccp->mf6cc_parent; 797 rt->mf6c_ifset = mfccp->mf6cc_ifset; 798 splx(s); 799 return 0; 800 } 801 802 /* 803 * Find the entry for which the upcall was made and update 804 */ 805 s = splsoftnet(); 806 hash = MF6CHASH(mfccp->mf6cc_origin.sin6_addr, 807 mfccp->mf6cc_mcastgrp.sin6_addr); 808 for (rt = mf6ctable[hash], nstl = 0; rt; rt = rt->mf6c_next) { 809 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 810 &mfccp->mf6cc_origin.sin6_addr) && 811 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 812 &mfccp->mf6cc_mcastgrp.sin6_addr) && 813 (rt->mf6c_stall != NULL)) { 814 815 if (nstl++) 816 log(LOG_ERR, 817 "add_m6fc: %s o %s g %s p %x dbx %p\n", 818 "multiple kernel entries", 819 IN6_PRINT(ip6bufo, 820 &mfccp->mf6cc_origin.sin6_addr), 821 IN6_PRINT(ip6bufm, 822 &mfccp->mf6cc_mcastgrp.sin6_addr), 823 mfccp->mf6cc_parent, rt->mf6c_stall); 824 825 #ifdef MRT6DEBUG 826 if (mrt6debug & DEBUG_MFC) 827 log(LOG_DEBUG, 828 "add_m6fc o %s g %s p %x dbg %p\n", 829 IN6_PRINT(ip6bufo, 830 &mfccp->mf6cc_origin.sin6_addr), 831 IN6_PRINT(ip6bufm, 832 &mfccp->mf6cc_mcastgrp.sin6_addr), 833 mfccp->mf6cc_parent, rt->mf6c_stall); 834 #endif 835 836 rt->mf6c_origin = mfccp->mf6cc_origin; 837 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 838 rt->mf6c_parent = mfccp->mf6cc_parent; 839 rt->mf6c_ifset = mfccp->mf6cc_ifset; 840 /* initialize pkt counters per src-grp */ 841 rt->mf6c_pkt_cnt = 0; 842 rt->mf6c_byte_cnt = 0; 843 rt->mf6c_wrong_if = 0; 844 845 rt->mf6c_expire = 0; /* Don't clean this guy up */ 846 n6expire[hash]--; 847 848 /* free packets Qed at the end of this entry */ 849 for (rte = rt->mf6c_stall; rte != NULL; ) { 850 struct rtdetq *n = rte->next; 851 if (rte->ifp) { 852 ip6_mdq(rte->m, rte->ifp, rt); 853 } 854 m_freem(rte->m); 855 #ifdef UPCALL_TIMING 856 collate(&(rte->t)); 857 #endif 858 free(rte, M_MRTABLE); 859 rte = n; 860 } 861 rt->mf6c_stall = NULL; 862 } 863 } 864 865 /* 866 * It is possible that an entry is being inserted without an upcall 867 */ 868 if (nstl == 0) { 869 #ifdef MRT6DEBUG 870 if (mrt6debug & DEBUG_MFC) 871 log(LOG_DEBUG, 872 "add_mfc no upcall h %ld o %s g %s p %x\n", 873 hash, 874 IN6_PRINT(ip6bufo, 875 &mfccp->mf6cc_origin.sin6_addr), 876 IN6_PRINT(ip6bufm, 877 &mfccp->mf6cc_mcastgrp.sin6_addr), 878 mfccp->mf6cc_parent); 879 #endif 880 881 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 882 883 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 884 &mfccp->mf6cc_origin.sin6_addr)&& 885 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 886 &mfccp->mf6cc_mcastgrp.sin6_addr)) { 887 888 rt->mf6c_origin = mfccp->mf6cc_origin; 889 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 890 rt->mf6c_parent = mfccp->mf6cc_parent; 891 rt->mf6c_ifset = mfccp->mf6cc_ifset; 892 /* initialize pkt counters per src-grp */ 893 rt->mf6c_pkt_cnt = 0; 894 rt->mf6c_byte_cnt = 0; 895 rt->mf6c_wrong_if = 0; 896 897 if (rt->mf6c_expire) 898 n6expire[hash]--; 899 rt->mf6c_expire = 0; 900 } 901 } 902 if (rt == NULL) { 903 /* no upcall, so make a new entry */ 904 rt = malloc(sizeof(*rt), M_MRTABLE, M_NOWAIT); 905 if (rt == NULL) { 906 splx(s); 907 return ENOBUFS; 908 } 909 910 /* insert new entry at head of hash chain */ 911 rt->mf6c_origin = mfccp->mf6cc_origin; 912 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 913 rt->mf6c_parent = mfccp->mf6cc_parent; 914 rt->mf6c_ifset = mfccp->mf6cc_ifset; 915 /* initialize pkt counters per src-grp */ 916 rt->mf6c_pkt_cnt = 0; 917 rt->mf6c_byte_cnt = 0; 918 rt->mf6c_wrong_if = 0; 919 rt->mf6c_expire = 0; 920 rt->mf6c_stall = NULL; 921 922 /* link into table */ 923 rt->mf6c_next = mf6ctable[hash]; 924 mf6ctable[hash] = rt; 925 } 926 } 927 splx(s); 928 return 0; 929 } 930 931 #ifdef UPCALL_TIMING 932 /* 933 * collect delay statistics on the upcalls 934 */ 935 static void 936 collate(struct timeval *t) 937 { 938 u_long d; 939 struct timeval tp; 940 u_long delta; 941 942 GET_TIME(tp); 943 944 if (TV_LT(*t, tp)) 945 { 946 TV_DELTA(tp, *t, delta); 947 948 d = delta >> 10; 949 if (d > UPCALL_MAX) 950 d = UPCALL_MAX; 951 952 ++upcall_data[d]; 953 } 954 } 955 #endif /* UPCALL_TIMING */ 956 957 /* 958 * Delete an mfc entry 959 */ 960 static int 961 del_m6fc(struct mf6cctl *mfccp) 962 { 963 struct sockaddr_in6 origin; 964 struct sockaddr_in6 mcastgrp; 965 struct mf6c *rt; 966 struct mf6c **nptr; 967 u_long hash; 968 int s; 969 970 origin = mfccp->mf6cc_origin; 971 mcastgrp = mfccp->mf6cc_mcastgrp; 972 hash = MF6CHASH(origin.sin6_addr, mcastgrp.sin6_addr); 973 974 #ifdef MRT6DEBUG 975 if (mrt6debug & DEBUG_MFC) { 976 char ip6bufo[INET6_ADDRSTRLEN], ip6bufm[INET6_ADDRSTRLEN]; 977 log(LOG_DEBUG,"del_m6fc orig %s mcastgrp %s\n", 978 IN6_PRINT(ip6bufo, &origin.sin6_addr), 979 IN6_PRINT(ip6bufm, &mcastgrp.sin6_addr)); 980 } 981 #endif 982 983 s = splsoftnet(); 984 985 nptr = &mf6ctable[hash]; 986 while ((rt = *nptr) != NULL) { 987 if (IN6_ARE_ADDR_EQUAL(&origin.sin6_addr, 988 &rt->mf6c_origin.sin6_addr) && 989 IN6_ARE_ADDR_EQUAL(&mcastgrp.sin6_addr, 990 &rt->mf6c_mcastgrp.sin6_addr) && 991 rt->mf6c_stall == NULL) 992 break; 993 994 nptr = &rt->mf6c_next; 995 } 996 if (rt == NULL) { 997 splx(s); 998 return EADDRNOTAVAIL; 999 } 1000 1001 *nptr = rt->mf6c_next; 1002 free(rt, M_MRTABLE); 1003 1004 splx(s); 1005 1006 return 0; 1007 } 1008 1009 static int 1010 socket_send(struct socket *s, struct mbuf *mm, struct sockaddr_in6 *src) 1011 { 1012 if (s) { 1013 if (sbappendaddr(&s->so_rcv, sin6tosa(src), mm, NULL) != 0) { 1014 sorwakeup(s); 1015 return 0; 1016 } 1017 soroverflow(s); 1018 } 1019 m_freem(mm); 1020 return -1; 1021 } 1022 1023 /* 1024 * IPv6 multicast forwarding function. This function assumes that the packet 1025 * pointed to by "ip6" has arrived on (or is about to be sent to) the interface 1026 * pointed to by "ifp", and the packet is to be relayed to other networks 1027 * that have members of the packet's destination IPv6 multicast group. 1028 * 1029 * The packet is returned unscathed to the caller, unless it is 1030 * erroneous, in which case a non-zero return value tells the caller to 1031 * discard it. 1032 */ 1033 int 1034 ip6_mforward(struct ip6_hdr *ip6, struct ifnet *ifp, struct mbuf *m) 1035 { 1036 struct mf6c *rt; 1037 struct mif6 *mifp; 1038 struct mbuf *mm; 1039 int s; 1040 mifi_t mifi; 1041 struct sockaddr_in6 sin6; 1042 char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN]; 1043 1044 #ifdef MRT6DEBUG 1045 if (mrt6debug & DEBUG_FORWARD) 1046 log(LOG_DEBUG, "ip6_mforward: src %s, dst %s, ifindex %d\n", 1047 IN6_PRINT(ip6bufs, &ip6->ip6_src), 1048 IN6_PRINT(ip6bufd, &ip6->ip6_dst), 1049 ifp->if_index); 1050 #endif 1051 1052 /* 1053 * Don't forward a packet with Hop limit of zero or one, 1054 * or a packet destined to a local-only group. 1055 */ 1056 if (ip6->ip6_hlim <= 1 || IN6_IS_ADDR_MC_NODELOCAL(&ip6->ip6_dst) || 1057 IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst)) 1058 return 0; 1059 ip6->ip6_hlim--; 1060 1061 /* 1062 * Source address check: do not forward packets with unspecified 1063 * source. It was discussed in July 2000, on ipngwg mailing list. 1064 * This is rather more serious than unicast cases, because some 1065 * MLD packets can be sent with the unspecified source address 1066 * (although such packets must normally set the hop limit field to 1). 1067 */ 1068 if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) { 1069 IP6_STATINC(IP6_STAT_CANTFORWARD); 1070 if (ip6_log_time + ip6_log_interval < time_uptime) { 1071 ip6_log_time = time_uptime; 1072 log(LOG_DEBUG, 1073 "cannot forward " 1074 "from %s to %s nxt %d received on %s\n", 1075 IN6_PRINT(ip6bufs, &ip6->ip6_src), 1076 IN6_PRINT(ip6bufd, &ip6->ip6_dst), 1077 ip6->ip6_nxt, 1078 m->m_pkthdr.rcvif_index ? 1079 if_name(m_get_rcvif_NOMPSAFE(m)) : "?"); 1080 } 1081 return 0; 1082 } 1083 1084 /* 1085 * Determine forwarding mifs from the forwarding cache table 1086 */ 1087 s = splsoftnet(); 1088 MF6CFIND(ip6->ip6_src, ip6->ip6_dst, rt); 1089 1090 /* Entry exists, so forward if necessary */ 1091 if (rt) { 1092 splx(s); 1093 return ip6_mdq(m, ifp, rt); 1094 } else { 1095 /* 1096 * If we don't have a route for packet's origin, make a copy 1097 * of the packet and send message to routing daemon. 1098 */ 1099 1100 struct mbuf *mb0; 1101 struct rtdetq *rte; 1102 u_long hash; 1103 1104 #ifdef UPCALL_TIMING 1105 struct timeval tp; 1106 GET_TIME(tp); 1107 #endif 1108 1109 mrt6stat.mrt6s_no_route++; 1110 #ifdef MRT6DEBUG 1111 if (mrt6debug & (DEBUG_FORWARD | DEBUG_MFC)) 1112 log(LOG_DEBUG, "ip6_mforward: no rte s %s g %s\n", 1113 IN6_PRINT(ip6bufs, &ip6->ip6_src), 1114 IN6_PRINT(ip6bufd, &ip6->ip6_dst)); 1115 #endif 1116 1117 /* 1118 * Allocate mbufs early so that we don't do extra work if we 1119 * are just going to fail anyway. 1120 */ 1121 rte = malloc(sizeof(*rte), M_MRTABLE, M_NOWAIT); 1122 if (rte == NULL) { 1123 splx(s); 1124 return ENOBUFS; 1125 } 1126 mb0 = m_copypacket(m, M_DONTWAIT); 1127 1128 /* 1129 * Pullup packet header if needed before storing it, 1130 * as other references may modify it in the meantime. 1131 */ 1132 if (mb0 && M_UNWRITABLE(mb0, sizeof(struct ip6_hdr))) 1133 mb0 = m_pullup(mb0, sizeof(struct ip6_hdr)); 1134 if (mb0 == NULL) { 1135 free(rte, M_MRTABLE); 1136 splx(s); 1137 return ENOBUFS; 1138 } 1139 1140 /* is there an upcall waiting for this packet? */ 1141 hash = MF6CHASH(ip6->ip6_src, ip6->ip6_dst); 1142 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 1143 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, 1144 &rt->mf6c_origin.sin6_addr) && 1145 IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, 1146 &rt->mf6c_mcastgrp.sin6_addr) && 1147 (rt->mf6c_stall != NULL)) 1148 break; 1149 } 1150 1151 if (rt == NULL) { 1152 struct mrt6msg *im; 1153 struct omrt6msg *oim; 1154 1155 /* no upcall, so make a new entry */ 1156 rt = malloc(sizeof(*rt), M_MRTABLE, M_NOWAIT); 1157 if (rt == NULL) { 1158 free(rte, M_MRTABLE); 1159 m_freem(mb0); 1160 splx(s); 1161 return ENOBUFS; 1162 } 1163 1164 /* 1165 * Make a copy of the header to send to the user 1166 * level process 1167 */ 1168 mm = m_copym(mb0, 0, sizeof(struct ip6_hdr), M_DONTWAIT); 1169 1170 if (mm == NULL) { 1171 free(rte, M_MRTABLE); 1172 m_freem(mb0); 1173 free(rt, M_MRTABLE); 1174 splx(s); 1175 return ENOBUFS; 1176 } 1177 1178 /* 1179 * Send message to routing daemon 1180 */ 1181 sockaddr_in6_init(&sin6, &ip6->ip6_src, 0, 0, 0); 1182 1183 im = NULL; 1184 oim = NULL; 1185 switch (ip6_mrouter_ver) { 1186 case MRT6_OINIT: 1187 oim = mtod(mm, struct omrt6msg *); 1188 oim->im6_msgtype = MRT6MSG_NOCACHE; 1189 oim->im6_mbz = 0; 1190 break; 1191 case MRT6_INIT: 1192 im = mtod(mm, struct mrt6msg *); 1193 im->im6_msgtype = MRT6MSG_NOCACHE; 1194 im->im6_mbz = 0; 1195 break; 1196 default: 1197 free(rte, M_MRTABLE); 1198 m_freem(mb0); 1199 free(rt, M_MRTABLE); 1200 splx(s); 1201 return EINVAL; 1202 } 1203 1204 #ifdef MRT6DEBUG 1205 if (mrt6debug & DEBUG_FORWARD) 1206 log(LOG_DEBUG, 1207 "getting the iif info in the kernel\n"); 1208 #endif 1209 1210 for (mifp = mif6table, mifi = 0; 1211 mifi < nummifs && mifp->m6_ifp != ifp; 1212 mifp++, mifi++) 1213 ; 1214 1215 switch (ip6_mrouter_ver) { 1216 case MRT6_OINIT: 1217 oim->im6_mif = mifi; 1218 break; 1219 case MRT6_INIT: 1220 im->im6_mif = mifi; 1221 break; 1222 } 1223 1224 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1225 log(LOG_WARNING, "ip6_mforward: ip6_mrouter " 1226 "socket queue full\n"); 1227 mrt6stat.mrt6s_upq_sockfull++; 1228 free(rte, M_MRTABLE); 1229 m_freem(mb0); 1230 free(rt, M_MRTABLE); 1231 splx(s); 1232 return ENOBUFS; 1233 } 1234 1235 mrt6stat.mrt6s_upcalls++; 1236 1237 /* insert new entry at head of hash chain */ 1238 memset(rt, 0, sizeof(*rt)); 1239 sockaddr_in6_init(&rt->mf6c_origin, &ip6->ip6_src, 1240 0, 0, 0); 1241 sockaddr_in6_init(&rt->mf6c_mcastgrp, &ip6->ip6_dst, 1242 0, 0, 0); 1243 rt->mf6c_expire = UPCALL_EXPIRE; 1244 n6expire[hash]++; 1245 rt->mf6c_parent = MF6C_INCOMPLETE_PARENT; 1246 1247 /* link into table */ 1248 rt->mf6c_next = mf6ctable[hash]; 1249 mf6ctable[hash] = rt; 1250 /* Add this entry to the end of the queue */ 1251 rt->mf6c_stall = rte; 1252 } else { 1253 /* determine if q has overflowed */ 1254 struct rtdetq **p; 1255 int npkts = 0; 1256 1257 for (p = &rt->mf6c_stall; *p != NULL; p = &(*p)->next) { 1258 if (++npkts > MAX_UPQ6) { 1259 mrt6stat.mrt6s_upq_ovflw++; 1260 free(rte, M_MRTABLE); 1261 m_freem(mb0); 1262 splx(s); 1263 return 0; 1264 } 1265 } 1266 1267 /* Add this entry to the end of the queue */ 1268 *p = rte; 1269 } 1270 1271 rte->next = NULL; 1272 rte->m = mb0; 1273 rte->ifp = ifp; 1274 #ifdef UPCALL_TIMING 1275 rte->t = tp; 1276 #endif 1277 1278 splx(s); 1279 1280 return 0; 1281 } 1282 } 1283 1284 /* 1285 * Clean up cache entries if upcalls are not serviced 1286 * Call from the Slow Timeout mechanism, every 0.25 seconds. 1287 */ 1288 static void 1289 expire_upcalls(void *unused) 1290 { 1291 struct rtdetq *rte; 1292 struct mf6c *mfc, **nptr; 1293 int i; 1294 1295 /* XXX NOMPSAFE still need softnet_lock */ 1296 mutex_enter(softnet_lock); 1297 KERNEL_LOCK(1, NULL); 1298 1299 for (i = 0; i < MF6CTBLSIZ; i++) { 1300 if (n6expire[i] == 0) 1301 continue; 1302 nptr = &mf6ctable[i]; 1303 while ((mfc = *nptr) != NULL) { 1304 rte = mfc->mf6c_stall; 1305 /* 1306 * Skip real cache entries 1307 * Make sure it wasn't marked to not expire (shouldn't happen) 1308 * If it expires now 1309 */ 1310 if (rte != NULL && 1311 mfc->mf6c_expire != 0 && 1312 --mfc->mf6c_expire == 0) { 1313 #ifdef MRT6DEBUG 1314 if (mrt6debug & DEBUG_EXPIRE) { 1315 char ip6bufo[INET6_ADDRSTRLEN]; 1316 char ip6bufm[INET6_ADDRSTRLEN]; 1317 log(LOG_DEBUG, 1318 "expire_upcalls: expiring (%s %s)\n", 1319 IN6_PRINT(ip6bufo, 1320 &mfc->mf6c_origin.sin6_addr), 1321 IN6_PRINT(ip6bufm, 1322 &mfc->mf6c_mcastgrp.sin6_addr)); 1323 } 1324 #endif 1325 /* 1326 * drop all the packets 1327 * free the mbuf with the pkt, if, timing info 1328 */ 1329 do { 1330 struct rtdetq *n = rte->next; 1331 m_freem(rte->m); 1332 free(rte, M_MRTABLE); 1333 rte = n; 1334 } while (rte != NULL); 1335 mrt6stat.mrt6s_cache_cleanups++; 1336 n6expire[i]--; 1337 1338 *nptr = mfc->mf6c_next; 1339 free(mfc, M_MRTABLE); 1340 } else { 1341 nptr = &mfc->mf6c_next; 1342 } 1343 } 1344 } 1345 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 1346 expire_upcalls, NULL); 1347 1348 KERNEL_UNLOCK_ONE(NULL); 1349 mutex_exit(softnet_lock); 1350 } 1351 1352 /* 1353 * Macro to send packet on mif. Since RSVP packets don't get counted on 1354 * input, they shouldn't get counted on output, so statistics keeping is 1355 * separate. 1356 */ 1357 #define MC6_SEND(ip6, mifp, m) do { \ 1358 if ((mifp)->m6_flags & MIFF_REGISTER) \ 1359 register_send((ip6), (mifp), (m)); \ 1360 else \ 1361 phyint_send((ip6), (mifp), (m)); \ 1362 } while (/*CONSTCOND*/ 0) 1363 1364 /* 1365 * Packet forwarding routine once entry in the cache is made 1366 */ 1367 static int 1368 ip6_mdq(struct mbuf *m, struct ifnet *ifp, struct mf6c *rt) 1369 { 1370 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 1371 mifi_t mifi, iif; 1372 struct mif6 *mifp; 1373 int plen = m->m_pkthdr.len; 1374 struct in6_addr src0, dst0; /* copies for local work */ 1375 u_int32_t iszone, idzone, oszone, odzone; 1376 int error = 0; 1377 1378 /* 1379 * Don't forward if it didn't arrive from the parent mif 1380 * for its origin. 1381 */ 1382 mifi = rt->mf6c_parent; 1383 if ((mifi >= nummifs) || (mif6table[mifi].m6_ifp != ifp)) { 1384 /* came in the wrong interface */ 1385 #ifdef MRT6DEBUG 1386 if (mrt6debug & DEBUG_FORWARD) 1387 log(LOG_DEBUG, 1388 "wrong if: ifid %d mifi %d mififid %x\n", 1389 ifp->if_index, mifi, 1390 mif6table[mifi].m6_ifp ? 1391 mif6table[mifi].m6_ifp->if_index : -1); 1392 #endif 1393 mrt6stat.mrt6s_wrong_if++; 1394 rt->mf6c_wrong_if++; 1395 1396 /* 1397 * If we are doing PIM processing, and we are forwarding 1398 * packets on this interface, send a message to the 1399 * routing daemon. 1400 */ 1401 /* have to make sure this is a valid mif */ 1402 if (mifi < nummifs && mif6table[mifi].m6_ifp) { 1403 if (pim6 && (m->m_flags & M_LOOP) == 0) { 1404 /* 1405 * Check the M_LOOP flag to avoid an 1406 * unnecessary PIM assert. 1407 * XXX: M_LOOP is an ad-hoc hack... 1408 */ 1409 struct sockaddr_in6 sin6; 1410 1411 struct mbuf *mm; 1412 struct mrt6msg *im; 1413 struct omrt6msg *oim; 1414 1415 mm = m_copym(m, 0, sizeof(struct ip6_hdr), M_DONTWAIT); 1416 if (mm && M_UNWRITABLE(mm, sizeof(struct ip6_hdr))) 1417 mm = m_pullup(mm, sizeof(struct ip6_hdr)); 1418 if (mm == NULL) 1419 return ENOBUFS; 1420 1421 oim = NULL; 1422 im = NULL; 1423 switch (ip6_mrouter_ver) { 1424 case MRT6_OINIT: 1425 oim = mtod(mm, struct omrt6msg *); 1426 oim->im6_msgtype = MRT6MSG_WRONGMIF; 1427 oim->im6_mbz = 0; 1428 break; 1429 case MRT6_INIT: 1430 im = mtod(mm, struct mrt6msg *); 1431 im->im6_msgtype = MRT6MSG_WRONGMIF; 1432 im->im6_mbz = 0; 1433 break; 1434 default: 1435 m_freem(mm); 1436 return EINVAL; 1437 } 1438 1439 for (mifp = mif6table, iif = 0; 1440 iif < nummifs && mifp && 1441 mifp->m6_ifp != ifp; 1442 mifp++, iif++) 1443 ; 1444 1445 memset(&sin6, 0, sizeof(sin6)); 1446 sin6.sin6_len = sizeof(sin6); 1447 sin6.sin6_family = AF_INET6; 1448 switch (ip6_mrouter_ver) { 1449 case MRT6_OINIT: 1450 oim->im6_mif = iif; 1451 sin6.sin6_addr = oim->im6_src; 1452 break; 1453 case MRT6_INIT: 1454 im->im6_mif = iif; 1455 sin6.sin6_addr = im->im6_src; 1456 break; 1457 } 1458 1459 mrt6stat.mrt6s_upcalls++; 1460 1461 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1462 #ifdef MRT6DEBUG 1463 if (mrt6debug) 1464 log(LOG_WARNING, "mdq, ip6_mrouter socket queue full\n"); 1465 #endif 1466 ++mrt6stat.mrt6s_upq_sockfull; 1467 return ENOBUFS; 1468 } 1469 } 1470 } 1471 1472 return 0; 1473 } 1474 1475 /* If I sourced this packet, it counts as output, else it was input. */ 1476 if (m->m_pkthdr.rcvif_index == 0) { 1477 /* XXX: is rcvif really NULL when output?? */ 1478 mif6table[mifi].m6_pkt_out++; 1479 mif6table[mifi].m6_bytes_out += plen; 1480 } else { 1481 mif6table[mifi].m6_pkt_in++; 1482 mif6table[mifi].m6_bytes_in += plen; 1483 } 1484 rt->mf6c_pkt_cnt++; 1485 rt->mf6c_byte_cnt += plen; 1486 1487 /* 1488 * For each mif, forward a copy of the packet if there are group 1489 * members downstream on the interface. 1490 */ 1491 src0 = ip6->ip6_src; 1492 dst0 = ip6->ip6_dst; 1493 if ((error = in6_setscope(&src0, ifp, &iszone)) != 0 || 1494 (error = in6_setscope(&dst0, ifp, &idzone)) != 0) { 1495 IP6_STATINC(IP6_STAT_BADSCOPE); 1496 return error; 1497 } 1498 for (mifp = mif6table, mifi = 0; mifi < nummifs; mifp++, mifi++) { 1499 if (IF_ISSET(mifi, &rt->mf6c_ifset)) { 1500 if (mif6table[mifi].m6_ifp == NULL) 1501 continue; 1502 /* 1503 * check if the outgoing packet is going to break 1504 * a scope boundary. 1505 * XXX: For packets through PIM register tunnel 1506 * interface, we believe the routing daemon. 1507 */ 1508 if ((mif6table[rt->mf6c_parent].m6_flags & 1509 MIFF_REGISTER) == 0 && 1510 (mif6table[mifi].m6_flags & MIFF_REGISTER) == 0) { 1511 if (in6_setscope(&src0, mif6table[mifi].m6_ifp, 1512 &oszone) || 1513 in6_setscope(&dst0, mif6table[mifi].m6_ifp, 1514 &odzone) || 1515 iszone != oszone || idzone != odzone) { 1516 IP6_STATINC(IP6_STAT_BADSCOPE); 1517 continue; 1518 } 1519 } 1520 1521 mifp->m6_pkt_out++; 1522 mifp->m6_bytes_out += plen; 1523 MC6_SEND(ip6, mifp, m); 1524 } 1525 } 1526 1527 return 0; 1528 } 1529 1530 static void 1531 phyint_send(struct ip6_hdr *ip6, struct mif6 *mifp, struct mbuf *m) 1532 { 1533 struct mbuf *mb_copy; 1534 struct ifnet *ifp = mifp->m6_ifp; 1535 int error __mrt6debugused = 0; 1536 int s; 1537 static struct route ro; 1538 bool ingroup; 1539 struct sockaddr_in6 dst6; 1540 u_long linkmtu; 1541 1542 s = splsoftnet(); 1543 1544 /* 1545 * Make a new reference to the packet; make sure that 1546 * the IPv6 header is actually copied, not just referenced, 1547 * so that ip6_output() only scribbles on the copy. 1548 */ 1549 mb_copy = m_copypacket(m, M_DONTWAIT); 1550 if (mb_copy && M_UNWRITABLE(mb_copy, sizeof(struct ip6_hdr))) 1551 mb_copy = m_pullup(mb_copy, sizeof(struct ip6_hdr)); 1552 if (mb_copy == NULL) { 1553 splx(s); 1554 return; 1555 } 1556 1557 /* set MCAST flag to the outgoing packet */ 1558 mb_copy->m_flags |= M_MCAST; 1559 1560 /* 1561 * If we sourced the packet, call ip6_output since we may divide 1562 * the packet into fragments when the packet is too big for the 1563 * outgoing interface. 1564 * Otherwise, we can simply send the packet to the interface 1565 * sending queue. 1566 */ 1567 if (m->m_pkthdr.rcvif_index == 0) { 1568 struct ip6_moptions im6o; 1569 1570 im6o.im6o_multicast_if_index = if_get_index(ifp); 1571 /* XXX: ip6_output will override ip6->ip6_hlim */ 1572 im6o.im6o_multicast_hlim = ip6->ip6_hlim; 1573 im6o.im6o_multicast_loop = 1; 1574 error = ip6_output(mb_copy, NULL, &ro, IPV6_FORWARDING, 1575 &im6o, NULL, NULL); 1576 1577 #ifdef MRT6DEBUG 1578 if (mrt6debug & DEBUG_XMIT) 1579 log(LOG_DEBUG, "phyint_send on mif %td err %d\n", 1580 mifp - mif6table, error); 1581 #endif 1582 splx(s); 1583 return; 1584 } 1585 1586 /* 1587 * If we belong to the destination multicast group 1588 * on the outgoing interface, loop back a copy. 1589 */ 1590 /* 1591 * Does not have to check source info, as it's alreay covered by 1592 * ip6_input 1593 */ 1594 sockaddr_in6_init(&dst6, &ip6->ip6_dst, 0, 0, 0); 1595 1596 ingroup = in6_multi_group(&ip6->ip6_dst, ifp); 1597 if (ingroup) { 1598 ip6_mloopback(ifp, m, 1599 satocsin6(rtcache_getdst(&ro))); 1600 } 1601 1602 /* 1603 * Put the packet into the sending queue of the outgoing interface 1604 * if it would fit in the MTU of the interface. 1605 */ 1606 linkmtu = IN6_LINKMTU(ifp); 1607 if (mb_copy->m_pkthdr.len <= linkmtu || linkmtu < IPV6_MMTU) { 1608 error = ip6_if_output(ifp, ifp, mb_copy, &dst6, NULL); 1609 #ifdef MRT6DEBUG 1610 if (mrt6debug & DEBUG_XMIT) 1611 log(LOG_DEBUG, "phyint_send on mif %td err %d\n", 1612 mifp - mif6table, error); 1613 #endif 1614 } else { 1615 /* 1616 * pMTU discovery is intentionally disabled by default, since 1617 * various routers may notify pMTU in multicast, which can be 1618 * a DDoS to a router. 1619 */ 1620 if (ip6_mcast_pmtu) { 1621 icmp6_error(mb_copy, ICMP6_PACKET_TOO_BIG, 0, linkmtu); 1622 } else { 1623 /* simply discard the packet */ 1624 #ifdef MRT6DEBUG 1625 if (mrt6debug & DEBUG_XMIT) { 1626 char ip6bufs[INET6_ADDRSTRLEN]; 1627 char ip6bufd[INET6_ADDRSTRLEN]; 1628 log(LOG_DEBUG, 1629 "phyint_send: packet too big on %s o %s g %s" 1630 " size %d(discarded)\n", 1631 if_name(ifp), 1632 IN6_PRINT(ip6bufs, &ip6->ip6_src), 1633 IN6_PRINT(ip6bufd, &ip6->ip6_dst), 1634 mb_copy->m_pkthdr.len); 1635 } 1636 #endif 1637 m_freem(mb_copy); 1638 } 1639 } 1640 1641 splx(s); 1642 } 1643 1644 static int 1645 register_send(struct ip6_hdr *ip6, struct mif6 *mif, struct mbuf *m) 1646 { 1647 struct mbuf *mm; 1648 int i, len = m->m_pkthdr.len; 1649 struct sockaddr_in6 sin6; 1650 struct mrt6msg *im6; 1651 1652 #ifdef MRT6DEBUG 1653 if (mrt6debug) { 1654 char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN]; 1655 log(LOG_DEBUG, "** IPv6 register_send **\n src %s dst %s\n", 1656 IN6_PRINT(ip6bufs, &ip6->ip6_src), 1657 IN6_PRINT(ip6bufd, &ip6->ip6_dst)); 1658 } 1659 #endif 1660 PIM6_STATINC(PIM6_STAT_SND_REGISTERS); 1661 1662 /* Make a copy of the packet to send to the user level process */ 1663 MGETHDR(mm, M_DONTWAIT, MT_HEADER); 1664 if (mm == NULL) 1665 return ENOBUFS; 1666 mm->m_data += max_linkhdr; 1667 mm->m_len = sizeof(struct ip6_hdr); 1668 1669 if ((mm->m_next = m_copypacket(m, M_DONTWAIT)) == NULL) { 1670 m_freem(mm); 1671 return ENOBUFS; 1672 } 1673 i = MHLEN - M_LEADINGSPACE(mm); 1674 if (i > len) 1675 i = len; 1676 mm = m_pullup(mm, i); 1677 if (mm == NULL) 1678 return ENOBUFS; 1679 mm->m_pkthdr.len = len + sizeof(struct ip6_hdr); 1680 1681 /* 1682 * Send message to routing daemon 1683 */ 1684 sockaddr_in6_init(&sin6, &ip6->ip6_src, 0, 0, 0); 1685 1686 im6 = mtod(mm, struct mrt6msg *); 1687 im6->im6_msgtype = MRT6MSG_WHOLEPKT; 1688 im6->im6_mbz = 0; 1689 im6->im6_mif = mif - mif6table; 1690 1691 /* iif info is not given for reg. encap.n */ 1692 mrt6stat.mrt6s_upcalls++; 1693 1694 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1695 #ifdef MRT6DEBUG 1696 if (mrt6debug) 1697 log(LOG_WARNING, 1698 "register_send: ip6_mrouter socket queue full\n"); 1699 #endif 1700 ++mrt6stat.mrt6s_upq_sockfull; 1701 return ENOBUFS; 1702 } 1703 1704 return 0; 1705 } 1706 1707 /* 1708 * PIM sparse mode hook. Receives the pim control messages, and passes them up 1709 * to the listening socket, using rip6_input. 1710 * 1711 * The only message processed is the REGISTER pim message; the pim header 1712 * is stripped off, and the inner packet is passed to register_mforward. 1713 */ 1714 int 1715 pim6_input(struct mbuf **mp, int *offp, int proto) 1716 { 1717 struct pim *pim; 1718 struct ip6_hdr *ip6 __mrt6debugused; 1719 int pimlen; 1720 struct mbuf *m = *mp; 1721 int minlen; 1722 int off = *offp; 1723 1724 PIM6_STATINC(PIM6_STAT_RCV_TOTAL); 1725 1726 ip6 = mtod(m, struct ip6_hdr *); 1727 pimlen = m->m_pkthdr.len - off; 1728 1729 /* 1730 * Validate lengths 1731 */ 1732 if (pimlen < PIM_MINLEN) { 1733 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1734 #ifdef MRT6DEBUG 1735 if (mrt6debug & DEBUG_PIM) 1736 log(LOG_DEBUG,"pim6_input: PIM packet too short\n"); 1737 #endif 1738 m_freem(m); 1739 return IPPROTO_DONE; 1740 } 1741 1742 /* 1743 * If the packet is at least as big as a REGISTER, go ahead 1744 * and grab the PIM REGISTER header size, to avoid another 1745 * possible m_pullup() later. 1746 * 1747 * PIM_MINLEN == pimhdr + u_int32 == 8 1748 * PIM6_REG_MINLEN == pimhdr + reghdr + eip6hdr == 4 + 4 + 40 1749 */ 1750 minlen = (pimlen >= PIM6_REG_MINLEN) ? PIM6_REG_MINLEN : PIM_MINLEN; 1751 1752 /* 1753 * Make sure that the IP6 and PIM headers in contiguous memory, and 1754 * possibly the PIM REGISTER header 1755 */ 1756 IP6_EXTHDR_GET(pim, struct pim *, m, off, minlen); 1757 if (pim == NULL) { 1758 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1759 return IPPROTO_DONE; 1760 } 1761 1762 /* PIM version check */ 1763 if (pim->pim_ver != PIM_VERSION) { 1764 PIM6_STATINC(PIM6_STAT_RCV_BADVERSION); 1765 #ifdef MRT6DEBUG 1766 log(LOG_ERR, 1767 "pim6_input: incorrect version %d, expecting %d\n", 1768 pim->pim_ver, PIM_VERSION); 1769 #endif 1770 m_freem(m); 1771 return IPPROTO_DONE; 1772 } 1773 1774 #define PIM6_CHECKSUM 1775 #ifdef PIM6_CHECKSUM 1776 { 1777 int cksumlen; 1778 1779 /* 1780 * Validate checksum. 1781 * If PIM REGISTER, exclude the data packet 1782 */ 1783 if (pim->pim_type == PIM_REGISTER) 1784 cksumlen = PIM_MINLEN; 1785 else 1786 cksumlen = pimlen; 1787 1788 if (in6_cksum(m, IPPROTO_PIM, off, cksumlen)) { 1789 PIM6_STATINC(PIM6_STAT_RCV_BADSUM); 1790 #ifdef MRT6DEBUG 1791 if (mrt6debug & DEBUG_PIM) 1792 log(LOG_DEBUG, 1793 "pim6_input: invalid checksum\n"); 1794 #endif 1795 m_freem(m); 1796 return IPPROTO_DONE; 1797 } 1798 } 1799 #endif /* PIM_CHECKSUM */ 1800 1801 if (pim->pim_type == PIM_REGISTER) { 1802 /* 1803 * since this is a REGISTER, we'll make a copy of the register 1804 * headers ip6+pim+u_int32_t+encap_ip6, to be passed up to the 1805 * routing daemon. 1806 */ 1807 static const struct sockaddr_in6 dst = { 1808 .sin6_len = sizeof(dst), 1809 .sin6_family = AF_INET6, 1810 }; 1811 1812 struct mbuf *mcp; 1813 struct ip6_hdr *eip6; 1814 u_int32_t *reghdr; 1815 1816 PIM6_STATINC(PIM6_STAT_RCV_REGISTERS); 1817 1818 if ((reg_mif_num >= nummifs) || (reg_mif_num == (mifi_t) -1)) { 1819 #ifdef MRT6DEBUG 1820 if (mrt6debug & DEBUG_PIM) 1821 log(LOG_DEBUG, 1822 "pim6_input: register mif not set: %d\n", 1823 reg_mif_num); 1824 #endif 1825 m_freem(m); 1826 return IPPROTO_DONE; 1827 } 1828 1829 reghdr = (u_int32_t *)(pim + 1); 1830 1831 if ((ntohl(*reghdr) & PIM_NULL_REGISTER)) 1832 goto pim6_input_to_daemon; 1833 1834 /* 1835 * Validate length 1836 */ 1837 if (pimlen < PIM6_REG_MINLEN) { 1838 #ifdef MRT6DEBUG 1839 char ip6buf[INET6_ADDRSTRLEN]; 1840 log(LOG_ERR, 1841 "pim6_input: register packet size too " 1842 "small %d from %s\n", 1843 pimlen, IN6_PRINT(ip6buf, &ip6->ip6_src)); 1844 #endif 1845 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1846 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1847 m_freem(m); 1848 return IPPROTO_DONE; 1849 } 1850 1851 eip6 = (struct ip6_hdr *)(reghdr + 1); 1852 #ifdef MRT6DEBUG 1853 if (mrt6debug & DEBUG_PIM) { 1854 char ip6bufs[INET6_ADDRSTRLEN]; 1855 char ip6bufd[INET6_ADDRSTRLEN]; 1856 log(LOG_DEBUG, 1857 "pim6_input[register], eip6: %s -> %s, " 1858 "eip6 plen %d\n", 1859 IN6_PRINT(ip6bufs, &eip6->ip6_src), 1860 IN6_PRINT(ip6bufd, &eip6->ip6_dst), 1861 ntohs(eip6->ip6_plen)); 1862 } 1863 #endif 1864 1865 /* verify the version number of the inner packet */ 1866 if ((eip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) { 1867 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1868 #ifdef MRT6DEBUG 1869 log(LOG_DEBUG, "pim6_input: invalid IP version (%d) " 1870 "of the inner packet\n", 1871 (eip6->ip6_vfc & IPV6_VERSION)); 1872 #endif 1873 m_freem(m); 1874 return IPPROTO_DONE; 1875 } 1876 1877 /* verify the inner packet is destined to a mcast group */ 1878 if (!IN6_IS_ADDR_MULTICAST(&eip6->ip6_dst)) { 1879 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1880 #ifdef MRT6DEBUG 1881 if (mrt6debug & DEBUG_PIM) { 1882 char ip6buf[INET6_ADDRSTRLEN]; 1883 log(LOG_DEBUG, 1884 "pim6_input: inner packet of register " 1885 "is not multicast %s\n", 1886 IN6_PRINT(ip6buf, &eip6->ip6_dst)); 1887 } 1888 #endif 1889 m_freem(m); 1890 return IPPROTO_DONE; 1891 } 1892 1893 /* 1894 * make a copy of the whole header to pass to the daemon later. 1895 */ 1896 mcp = m_copym(m, 0, off + PIM6_REG_MINLEN, M_DONTWAIT); 1897 if (mcp == NULL) { 1898 #ifdef MRT6DEBUG 1899 log(LOG_ERR, 1900 "pim6_input: pim register: " 1901 "could not copy register head\n"); 1902 #endif 1903 m_freem(m); 1904 return IPPROTO_DONE; 1905 } 1906 1907 /* 1908 * forward the inner ip6 packet; point m_data at the inner ip6. 1909 */ 1910 m_adj(m, off + PIM_MINLEN); 1911 #ifdef MRT6DEBUG 1912 if (mrt6debug & DEBUG_PIM) { 1913 char ip6bufs[INET6_ADDRSTRLEN]; 1914 char ip6bufd[INET6_ADDRSTRLEN]; 1915 log(LOG_DEBUG, 1916 "pim6_input: forwarding decapsulated register: " 1917 "src %s, dst %s, mif %d\n", 1918 IN6_PRINT(ip6bufs, &eip6->ip6_src), 1919 IN6_PRINT(ip6bufd, &eip6->ip6_dst), 1920 reg_mif_num); 1921 } 1922 #endif 1923 1924 looutput(mif6table[reg_mif_num].m6_ifp, m, sin6tocsa(&dst), 1925 NULL); 1926 1927 /* prepare the register head to send to the mrouting daemon */ 1928 m = mcp; 1929 } 1930 1931 /* 1932 * Pass the PIM message up to the daemon; if it is a register message 1933 * pass the 'head' only up to the daemon. This includes the 1934 * encapsulator ip6 header, pim header, register header and the 1935 * encapsulated ip6 header. 1936 */ 1937 pim6_input_to_daemon: 1938 rip6_input(&m, offp, proto); 1939 return IPPROTO_DONE; 1940 } 1941 1942 static int 1943 sysctl_net_inet6_pim6_stats(SYSCTLFN_ARGS) 1944 { 1945 1946 return (NETSTAT_SYSCTL(pim6stat_percpu, PIM6_NSTATS)); 1947 } 1948 1949 static void 1950 sysctl_net_inet6_pim6_setup(struct sysctllog **clog) 1951 { 1952 1953 sysctl_createv(clog, 0, NULL, NULL, 1954 CTLFLAG_PERMANENT, 1955 CTLTYPE_NODE, "inet6", NULL, 1956 NULL, 0, NULL, 0, 1957 CTL_NET, PF_INET6, CTL_EOL); 1958 sysctl_createv(clog, 0, NULL, NULL, 1959 CTLFLAG_PERMANENT, 1960 CTLTYPE_NODE, "pim6", 1961 SYSCTL_DESCR("PIMv6 settings"), 1962 NULL, 0, NULL, 0, 1963 CTL_NET, PF_INET6, IPPROTO_PIM, CTL_EOL); 1964 1965 sysctl_createv(clog, 0, NULL, NULL, 1966 CTLFLAG_PERMANENT, 1967 CTLTYPE_STRUCT, "stats", 1968 SYSCTL_DESCR("PIMv6 statistics"), 1969 sysctl_net_inet6_pim6_stats, 0, NULL, 0, 1970 CTL_NET, PF_INET6, IPPROTO_PIM, PIM6CTL_STATS, 1971 CTL_EOL); 1972 } 1973