ip6_mroute.c revision 1.125
1 /* $NetBSD: ip6_mroute.c,v 1.125 2018/04/26 19:50:09 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 1.125 2018/04/26 19:50:09 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 #include <net/net_osdep.h> 160 161 static int ip6_mdq(struct mbuf *, struct ifnet *, struct mf6c *); 162 static void phyint_send(struct ip6_hdr *, struct mif6 *, struct mbuf *); 163 164 static int set_pim6(int *); 165 static int socket_send(struct socket *, struct mbuf *, struct sockaddr_in6 *); 166 static int register_send(struct ip6_hdr *, struct mif6 *, struct mbuf *); 167 168 /* 169 * Globals. All but ip6_mrouter, ip6_mrtproto and mrt6stat could be static, 170 * except for netstat or debugging purposes. 171 */ 172 struct socket *ip6_mrouter = NULL; 173 int ip6_mrouter_ver = 0; 174 int ip6_mrtproto = IPPROTO_PIM; /* for netstat only */ 175 struct mrt6stat mrt6stat; 176 177 #define NO_RTE_FOUND 0x1 178 #define RTE_FOUND 0x2 179 180 struct mf6c *mf6ctable[MF6CTBLSIZ]; 181 u_char n6expire[MF6CTBLSIZ]; 182 struct mif6 mif6table[MAXMIFS]; 183 #ifdef MRT6DEBUG 184 u_int mrt6debug = 0; /* debug level */ 185 #define DEBUG_MFC 0x02 186 #define DEBUG_FORWARD 0x04 187 #define DEBUG_EXPIRE 0x08 188 #define DEBUG_XMIT 0x10 189 #define DEBUG_REG 0x20 190 #define DEBUG_PIM 0x40 191 #define __mrt6debugused /* empty */ 192 #else 193 #define __mrt6debugused __unused 194 #endif 195 196 static void expire_upcalls(void *); 197 #define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */ 198 #define UPCALL_EXPIRE 6 /* number of timeouts */ 199 200 #ifdef INET 201 #ifdef MROUTING 202 extern struct socket *ip_mrouter; 203 #endif 204 #endif 205 206 /* 207 * 'Interfaces' associated with decapsulator (so we can tell 208 * packets that went through it from ones that get reflected 209 * by a broken gateway). These interfaces are never linked into 210 * the system ifnet list & no routes point to them. I.e., packets 211 * can't be sent this way. They only exist as a placeholder for 212 * multicast source verification. 213 */ 214 struct ifnet multicast_register_if6; 215 216 #define ENCAP_HOPS 64 217 218 /* 219 * Private variables. 220 */ 221 static mifi_t nummifs = 0; 222 static mifi_t reg_mif_num = (mifi_t)-1; 223 224 static percpu_t *pim6stat_percpu; 225 226 #define PIM6_STATINC(x) _NET_STATINC(pim6stat_percpu, x) 227 228 static int pim6; 229 230 /* 231 * Hash function for a source, group entry 232 */ 233 #define MF6CHASH(a, g) MF6CHASHMOD((a).s6_addr32[0] ^ (a).s6_addr32[1] ^ \ 234 (a).s6_addr32[2] ^ (a).s6_addr32[3] ^ \ 235 (g).s6_addr32[0] ^ (g).s6_addr32[1] ^ \ 236 (g).s6_addr32[2] ^ (g).s6_addr32[3]) 237 238 /* 239 * Find a route for a given origin IPv6 address and Multicast group address. 240 * Quality of service parameter to be added in the future!!! 241 */ 242 243 #define MF6CFIND(o, g, rt) do { \ 244 struct mf6c *_rt = mf6ctable[MF6CHASH(o,g)]; \ 245 rt = NULL; \ 246 mrt6stat.mrt6s_mfc_lookups++; \ 247 while (_rt) { \ 248 if (IN6_ARE_ADDR_EQUAL(&_rt->mf6c_origin.sin6_addr, &(o)) && \ 249 IN6_ARE_ADDR_EQUAL(&_rt->mf6c_mcastgrp.sin6_addr, &(g)) && \ 250 (_rt->mf6c_stall == NULL)) { \ 251 rt = _rt; \ 252 break; \ 253 } \ 254 _rt = _rt->mf6c_next; \ 255 } \ 256 if (rt == NULL) { \ 257 mrt6stat.mrt6s_mfc_misses++; \ 258 } \ 259 } while (/*CONSTCOND*/ 0) 260 261 /* 262 * Macros to compute elapsed time efficiently 263 * Borrowed from Van Jacobson's scheduling code 264 */ 265 #define TV_DELTA(a, b, delta) do { \ 266 int xxs; \ 267 \ 268 delta = (a).tv_usec - (b).tv_usec; \ 269 if ((xxs = (a).tv_sec - (b).tv_sec)) { \ 270 switch (xxs) { \ 271 case 2: \ 272 delta += 1000000; \ 273 /* FALLTHROUGH */ \ 274 case 1: \ 275 delta += 1000000; \ 276 break; \ 277 default: \ 278 delta += (1000000 * xxs); \ 279 } \ 280 } \ 281 } while (/*CONSTCOND*/ 0) 282 283 #define TV_LT(a, b) (((a).tv_usec < (b).tv_usec && \ 284 (a).tv_sec <= (b).tv_sec) || (a).tv_sec < (b).tv_sec) 285 286 #ifdef UPCALL_TIMING 287 #define UPCALL_MAX 50 288 u_long upcall_data[UPCALL_MAX + 1]; 289 static void collate(); 290 #endif /* UPCALL_TIMING */ 291 292 static int get_sg_cnt(struct sioc_sg_req6 *); 293 static int get_mif6_cnt(struct sioc_mif_req6 *); 294 static int ip6_mrouter_init(struct socket *, int, int); 295 static int add_m6if(struct mif6ctl *); 296 static int del_m6if(mifi_t *); 297 static int add_m6fc(struct mf6cctl *); 298 static int del_m6fc(struct mf6cctl *); 299 static void sysctl_net_inet6_pim6_setup(struct sysctllog **); 300 301 static callout_t expire_upcalls_ch; 302 303 void 304 pim6_init(void) 305 { 306 307 sysctl_net_inet6_pim6_setup(NULL); 308 pim6stat_percpu = percpu_alloc(sizeof(uint64_t) * PIM6_NSTATS); 309 } 310 311 /* 312 * Handle MRT setsockopt commands to modify the multicast routing tables. 313 */ 314 int 315 ip6_mrouter_set(struct socket *so, struct sockopt *sopt) 316 { 317 int error, optval; 318 struct mif6ctl mifc; 319 struct mf6cctl mfcc; 320 mifi_t mifi; 321 322 if (sopt->sopt_name != MRT6_INIT && so != ip6_mrouter) 323 return (EACCES); 324 325 error = 0; 326 327 switch (sopt->sopt_name) { 328 #ifdef MRT6_OINIT 329 case MRT6_OINIT: 330 #endif 331 case MRT6_INIT: 332 error = sockopt_getint(sopt, &optval); 333 if (error) 334 break; 335 return (ip6_mrouter_init(so, optval, sopt->sopt_name)); 336 case MRT6_DONE: 337 return (ip6_mrouter_done()); 338 case MRT6_ADD_MIF: 339 error = sockopt_get(sopt, &mifc, sizeof(mifc)); 340 if (error) 341 break; 342 return (add_m6if(&mifc)); 343 case MRT6_DEL_MIF: 344 error = sockopt_get(sopt, &mifi, sizeof(mifi)); 345 if (error) 346 break; 347 return (del_m6if(&mifi)); 348 case MRT6_ADD_MFC: 349 error = sockopt_get(sopt, &mfcc, sizeof(mfcc)); 350 if (error) 351 break; 352 return (add_m6fc(&mfcc)); 353 case MRT6_DEL_MFC: 354 error = sockopt_get(sopt, &mfcc, sizeof(mfcc)); 355 if (error) 356 break; 357 return (del_m6fc(&mfcc)); 358 case MRT6_PIM: 359 error = sockopt_getint(sopt, &optval); 360 if (error) 361 break; 362 return (set_pim6(&optval)); 363 default: 364 error = EOPNOTSUPP; 365 } 366 367 return (error); 368 } 369 370 /* 371 * Handle MRT getsockopt commands 372 */ 373 int 374 ip6_mrouter_get(struct socket *so, struct sockopt *sopt) 375 { 376 int error; 377 378 if (so != ip6_mrouter) 379 return EACCES; 380 381 error = 0; 382 383 switch (sopt->sopt_name) { 384 case MRT6_PIM: 385 error = sockopt_set(sopt, &pim6, sizeof(pim6)); 386 break; 387 default: 388 error = EOPNOTSUPP; 389 break; 390 } 391 392 return (error); 393 } 394 395 /* 396 * Handle ioctl commands to obtain information from the cache 397 */ 398 int 399 mrt6_ioctl(u_long cmd, void *data) 400 { 401 402 switch (cmd) { 403 case SIOCGETSGCNT_IN6: 404 return (get_sg_cnt((struct sioc_sg_req6 *)data)); 405 case SIOCGETMIFCNT_IN6: 406 return (get_mif6_cnt((struct sioc_mif_req6 *)data)); 407 default: 408 return (EINVAL); 409 } 410 } 411 412 /* 413 * returns the packet, byte, rpf-failure count for the source group provided 414 */ 415 static int 416 get_sg_cnt(struct sioc_sg_req6 *req) 417 { 418 struct mf6c *rt; 419 int s; 420 421 s = splsoftnet(); 422 MF6CFIND(req->src.sin6_addr, req->grp.sin6_addr, rt); 423 splx(s); 424 if (rt != NULL) { 425 req->pktcnt = rt->mf6c_pkt_cnt; 426 req->bytecnt = rt->mf6c_byte_cnt; 427 req->wrong_if = rt->mf6c_wrong_if; 428 } else 429 return (ESRCH); 430 #if 0 431 req->pktcnt = req->bytecnt = req->wrong_if = 0xffffffff; 432 #endif 433 434 return 0; 435 } 436 437 /* 438 * returns the input and output packet and byte counts on the mif provided 439 */ 440 static int 441 get_mif6_cnt(struct sioc_mif_req6 *req) 442 { 443 mifi_t mifi = req->mifi; 444 445 if (mifi >= nummifs) 446 return EINVAL; 447 448 req->icount = mif6table[mifi].m6_pkt_in; 449 req->ocount = mif6table[mifi].m6_pkt_out; 450 req->ibytes = mif6table[mifi].m6_bytes_in; 451 req->obytes = mif6table[mifi].m6_bytes_out; 452 453 return 0; 454 } 455 456 static int 457 set_pim6(int *i) 458 { 459 if ((*i != 1) && (*i != 0)) 460 return EINVAL; 461 462 pim6 = *i; 463 464 return 0; 465 } 466 467 /* 468 * Enable multicast routing 469 */ 470 static int 471 ip6_mrouter_init(struct socket *so, int v, int cmd) 472 { 473 #ifdef MRT6DEBUG 474 if (mrt6debug) 475 log(LOG_DEBUG, 476 "ip6_mrouter_init: so_type = %d, pr_protocol = %d\n", 477 so->so_type, so->so_proto->pr_protocol); 478 #endif 479 480 if (so->so_type != SOCK_RAW || 481 so->so_proto->pr_protocol != IPPROTO_ICMPV6) 482 return EOPNOTSUPP; 483 484 if (v != 1) 485 return ENOPROTOOPT; 486 487 if (ip6_mrouter != NULL) 488 return EADDRINUSE; 489 490 ip6_mrouter = so; 491 ip6_mrouter_ver = cmd; 492 493 memset((void *)mf6ctable, 0, sizeof(mf6ctable)); 494 memset((void *)n6expire, 0, sizeof(n6expire)); 495 496 pim6 = 0;/* used for stubbing out/in pim stuff */ 497 498 callout_init(&expire_upcalls_ch, CALLOUT_MPSAFE); 499 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 500 expire_upcalls, NULL); 501 502 #ifdef MRT6DEBUG 503 if (mrt6debug) 504 log(LOG_DEBUG, "ip6_mrouter_init\n"); 505 #endif 506 507 return 0; 508 } 509 510 /* 511 * Disable multicast routing 512 */ 513 int 514 ip6_mrouter_done(void) 515 { 516 mifi_t mifi; 517 int i; 518 struct ifnet *ifp; 519 struct sockaddr_in6 sin6; 520 struct mf6c *rt; 521 struct rtdetq *rte; 522 int s; 523 524 s = splsoftnet(); 525 526 /* 527 * For each phyint in use, disable promiscuous reception of all IPv6 528 * multicasts. 529 */ 530 #ifdef INET 531 #ifdef MROUTING 532 /* 533 * If there is still IPv4 multicast routing daemon, 534 * we remain interfaces to receive all muliticasted packets. 535 * XXX: there may be an interface in which the IPv4 multicast 536 * daemon is not interested... 537 */ 538 if (!ip_mrouter) 539 #endif 540 #endif 541 { 542 for (mifi = 0; mifi < nummifs; mifi++) { 543 if (mif6table[mifi].m6_ifp && 544 !(mif6table[mifi].m6_flags & MIFF_REGISTER)) { 545 sin6.sin6_family = AF_INET6; 546 sin6.sin6_addr = in6addr_any; 547 ifp = mif6table[mifi].m6_ifp; 548 if_mcast_op(ifp, SIOCDELMULTI, 549 sin6tocsa(&sin6)); 550 } 551 } 552 } 553 554 memset((void *)mif6table, 0, sizeof(mif6table)); 555 nummifs = 0; 556 557 pim6 = 0; /* used to stub out/in pim specific code */ 558 559 callout_stop(&expire_upcalls_ch); 560 561 /* 562 * Free all multicast forwarding cache entries. 563 */ 564 for (i = 0; i < MF6CTBLSIZ; i++) { 565 rt = mf6ctable[i]; 566 while (rt) { 567 struct mf6c *frt; 568 569 for (rte = rt->mf6c_stall; rte != NULL; ) { 570 struct rtdetq *n = rte->next; 571 572 m_freem(rte->m); 573 free(rte, M_MRTABLE); 574 rte = n; 575 } 576 frt = rt; 577 rt = rt->mf6c_next; 578 free(frt, M_MRTABLE); 579 } 580 } 581 582 memset((void *)mf6ctable, 0, sizeof(mf6ctable)); 583 584 /* 585 * Reset register interface 586 */ 587 if (reg_mif_num != (mifi_t)-1) { 588 if_detach(&multicast_register_if6); 589 reg_mif_num = (mifi_t)-1; 590 } 591 592 ip6_mrouter = NULL; 593 ip6_mrouter_ver = 0; 594 595 splx(s); 596 597 #ifdef MRT6DEBUG 598 if (mrt6debug) 599 log(LOG_DEBUG, "ip6_mrouter_done\n"); 600 #endif 601 602 return 0; 603 } 604 605 void 606 ip6_mrouter_detach(struct ifnet *ifp) 607 { 608 struct rtdetq *rte; 609 struct mf6c *mfc; 610 mifi_t mifi; 611 int i; 612 613 if (ip6_mrouter == NULL) 614 return; 615 616 /* 617 * Delete a mif which points to ifp. 618 */ 619 for (mifi = 0; mifi < nummifs; mifi++) 620 if (mif6table[mifi].m6_ifp == ifp) 621 del_m6if(&mifi); 622 623 /* 624 * Clear rte->ifp of cache entries received on ifp. 625 */ 626 for (i = 0; i < MF6CTBLSIZ; i++) { 627 if (n6expire[i] == 0) 628 continue; 629 630 for (mfc = mf6ctable[i]; mfc != NULL; mfc = mfc->mf6c_next) { 631 for (rte = mfc->mf6c_stall; rte != NULL; rte = rte->next) { 632 if (rte->ifp == ifp) 633 rte->ifp = NULL; 634 } 635 } 636 } 637 } 638 639 /* 640 * Add a mif to the mif table 641 */ 642 static int 643 add_m6if(struct mif6ctl *mifcp) 644 { 645 struct mif6 *mifp; 646 struct ifnet *ifp; 647 struct sockaddr_in6 sin6; 648 int error, s; 649 650 if (mifcp->mif6c_mifi >= MAXMIFS) 651 return EINVAL; 652 mifp = mif6table + mifcp->mif6c_mifi; 653 if (mifp->m6_ifp) 654 return EADDRINUSE; /* XXX: is it appropriate? */ 655 if (!mifcp->mif6c_pifi || (ifp = if_byindex(mifcp->mif6c_pifi)) == NULL) 656 return ENXIO; 657 658 if (mifcp->mif6c_flags & MIFF_REGISTER) { 659 ifp = &multicast_register_if6; 660 661 if (reg_mif_num == (mifi_t)-1) { 662 strlcpy(ifp->if_xname, "register_mif", 663 sizeof(ifp->if_xname)); 664 ifp->if_flags |= IFF_LOOPBACK; 665 ifp->if_index = mifcp->mif6c_mifi; 666 reg_mif_num = mifcp->mif6c_mifi; 667 if_attach(ifp); 668 } 669 } else { 670 /* Make sure the interface supports multicast */ 671 if ((ifp->if_flags & IFF_MULTICAST) == 0) 672 return EOPNOTSUPP; 673 674 s = splsoftnet(); 675 /* 676 * Enable promiscuous reception of all IPv6 multicasts 677 * from the interface. 678 */ 679 sin6.sin6_family = AF_INET6; 680 sin6.sin6_addr = in6addr_any; 681 error = if_mcast_op(ifp, SIOCADDMULTI, sin6tosa(&sin6)); 682 splx(s); 683 if (error) 684 return error; 685 } 686 687 s = splsoftnet(); 688 mifp->m6_flags = mifcp->mif6c_flags; 689 mifp->m6_ifp = ifp; 690 #ifdef notyet 691 /* scaling up here allows division by 1024 in critical code */ 692 mifp->m6_rate_limit = mifcp->mif6c_rate_limit * 1024 / 1000; 693 #endif 694 /* initialize per mif pkt counters */ 695 mifp->m6_pkt_in = 0; 696 mifp->m6_pkt_out = 0; 697 mifp->m6_bytes_in = 0; 698 mifp->m6_bytes_out = 0; 699 splx(s); 700 701 /* Adjust nummifs up if the mifi is higher than nummifs */ 702 if (nummifs <= mifcp->mif6c_mifi) 703 nummifs = mifcp->mif6c_mifi + 1; 704 705 #ifdef MRT6DEBUG 706 if (mrt6debug) 707 log(LOG_DEBUG, 708 "add_mif #%d, phyint %s\n", 709 mifcp->mif6c_mifi, ifp->if_xname); 710 #endif 711 712 return 0; 713 } 714 715 /* 716 * Delete a mif from the mif table 717 */ 718 static int 719 del_m6if(mifi_t *mifip) 720 { 721 struct mif6 *mifp = mif6table + *mifip; 722 mifi_t mifi; 723 struct ifnet *ifp; 724 struct sockaddr_in6 sin6; 725 int s; 726 727 if (*mifip >= nummifs) 728 return EINVAL; 729 if (mifp->m6_ifp == NULL) 730 return EINVAL; 731 732 s = splsoftnet(); 733 734 if (!(mifp->m6_flags & MIFF_REGISTER)) { 735 /* 736 * XXX: what if there is yet IPv4 multicast daemon 737 * using the interface? 738 */ 739 ifp = mifp->m6_ifp; 740 741 sin6.sin6_family = AF_INET6; 742 sin6.sin6_addr = in6addr_any; 743 if_mcast_op(ifp, SIOCDELMULTI, sin6tosa(&sin6)); 744 } else { 745 if (reg_mif_num != (mifi_t)-1) { 746 if_detach(&multicast_register_if6); 747 reg_mif_num = (mifi_t)-1; 748 } 749 } 750 751 memset((void *)mifp, 0, sizeof (*mifp)); 752 753 /* Adjust nummifs down */ 754 for (mifi = nummifs; mifi > 0; mifi--) 755 if (mif6table[mifi - 1].m6_ifp) 756 break; 757 nummifs = mifi; 758 759 splx(s); 760 761 #ifdef MRT6DEBUG 762 if (mrt6debug) 763 log(LOG_DEBUG, "del_m6if %d, nummifs %d\n", *mifip, nummifs); 764 #endif 765 766 return 0; 767 } 768 769 /* 770 * Add an mfc entry 771 */ 772 static int 773 add_m6fc(struct mf6cctl *mfccp) 774 { 775 struct mf6c *rt; 776 u_long hash; 777 struct rtdetq *rte; 778 u_short nstl; 779 int s; 780 char ip6bufo[INET6_ADDRSTRLEN], ip6bufm[INET6_ADDRSTRLEN]; 781 782 MF6CFIND(mfccp->mf6cc_origin.sin6_addr, 783 mfccp->mf6cc_mcastgrp.sin6_addr, rt); 784 785 /* If an entry already exists, just update the fields */ 786 if (rt) { 787 #ifdef MRT6DEBUG 788 if (mrt6debug & DEBUG_MFC) 789 log(LOG_DEBUG,"add_m6fc update o %s g %s p %x\n", 790 IN6_PRINT(ip6bufo, 791 &mfccp->mf6cc_origin.sin6_addr), 792 IN6_PRINT(ip6bufm, 793 &mfccp->mf6cc_mcastgrp.sin6_addr), 794 mfccp->mf6cc_parent); 795 #endif 796 797 s = splsoftnet(); 798 rt->mf6c_parent = mfccp->mf6cc_parent; 799 rt->mf6c_ifset = mfccp->mf6cc_ifset; 800 splx(s); 801 return 0; 802 } 803 804 /* 805 * Find the entry for which the upcall was made and update 806 */ 807 s = splsoftnet(); 808 hash = MF6CHASH(mfccp->mf6cc_origin.sin6_addr, 809 mfccp->mf6cc_mcastgrp.sin6_addr); 810 for (rt = mf6ctable[hash], nstl = 0; rt; rt = rt->mf6c_next) { 811 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 812 &mfccp->mf6cc_origin.sin6_addr) && 813 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 814 &mfccp->mf6cc_mcastgrp.sin6_addr) && 815 (rt->mf6c_stall != NULL)) { 816 817 if (nstl++) 818 log(LOG_ERR, 819 "add_m6fc: %s o %s g %s p %x dbx %p\n", 820 "multiple kernel entries", 821 IN6_PRINT(ip6bufo, 822 &mfccp->mf6cc_origin.sin6_addr), 823 IN6_PRINT(ip6bufm, 824 &mfccp->mf6cc_mcastgrp.sin6_addr), 825 mfccp->mf6cc_parent, rt->mf6c_stall); 826 827 #ifdef MRT6DEBUG 828 if (mrt6debug & DEBUG_MFC) 829 log(LOG_DEBUG, 830 "add_m6fc o %s g %s p %x dbg %p\n", 831 IN6_PRINT(ip6bufo, 832 &mfccp->mf6cc_origin.sin6_addr), 833 IN6_PRINT(ip6bufm, 834 &mfccp->mf6cc_mcastgrp.sin6_addr), 835 mfccp->mf6cc_parent, rt->mf6c_stall); 836 #endif 837 838 rt->mf6c_origin = mfccp->mf6cc_origin; 839 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 840 rt->mf6c_parent = mfccp->mf6cc_parent; 841 rt->mf6c_ifset = mfccp->mf6cc_ifset; 842 /* initialize pkt counters per src-grp */ 843 rt->mf6c_pkt_cnt = 0; 844 rt->mf6c_byte_cnt = 0; 845 rt->mf6c_wrong_if = 0; 846 847 rt->mf6c_expire = 0; /* Don't clean this guy up */ 848 n6expire[hash]--; 849 850 /* free packets Qed at the end of this entry */ 851 for (rte = rt->mf6c_stall; rte != NULL; ) { 852 struct rtdetq *n = rte->next; 853 if (rte->ifp) { 854 ip6_mdq(rte->m, rte->ifp, rt); 855 } 856 m_freem(rte->m); 857 #ifdef UPCALL_TIMING 858 collate(&(rte->t)); 859 #endif 860 free(rte, M_MRTABLE); 861 rte = n; 862 } 863 rt->mf6c_stall = NULL; 864 } 865 } 866 867 /* 868 * It is possible that an entry is being inserted without an upcall 869 */ 870 if (nstl == 0) { 871 #ifdef MRT6DEBUG 872 if (mrt6debug & DEBUG_MFC) 873 log(LOG_DEBUG, 874 "add_mfc no upcall h %ld o %s g %s p %x\n", 875 hash, 876 IN6_PRINT(ip6bufo, 877 &mfccp->mf6cc_origin.sin6_addr), 878 IN6_PRINT(ip6bufm, 879 &mfccp->mf6cc_mcastgrp.sin6_addr), 880 mfccp->mf6cc_parent); 881 #endif 882 883 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 884 885 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 886 &mfccp->mf6cc_origin.sin6_addr)&& 887 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 888 &mfccp->mf6cc_mcastgrp.sin6_addr)) { 889 890 rt->mf6c_origin = mfccp->mf6cc_origin; 891 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 892 rt->mf6c_parent = mfccp->mf6cc_parent; 893 rt->mf6c_ifset = mfccp->mf6cc_ifset; 894 /* initialize pkt counters per src-grp */ 895 rt->mf6c_pkt_cnt = 0; 896 rt->mf6c_byte_cnt = 0; 897 rt->mf6c_wrong_if = 0; 898 899 if (rt->mf6c_expire) 900 n6expire[hash]--; 901 rt->mf6c_expire = 0; 902 } 903 } 904 if (rt == NULL) { 905 /* no upcall, so make a new entry */ 906 rt = malloc(sizeof(*rt), M_MRTABLE, M_NOWAIT); 907 if (rt == NULL) { 908 splx(s); 909 return ENOBUFS; 910 } 911 912 /* insert new entry at head of hash chain */ 913 rt->mf6c_origin = mfccp->mf6cc_origin; 914 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 915 rt->mf6c_parent = mfccp->mf6cc_parent; 916 rt->mf6c_ifset = mfccp->mf6cc_ifset; 917 /* initialize pkt counters per src-grp */ 918 rt->mf6c_pkt_cnt = 0; 919 rt->mf6c_byte_cnt = 0; 920 rt->mf6c_wrong_if = 0; 921 rt->mf6c_expire = 0; 922 rt->mf6c_stall = NULL; 923 924 /* link into table */ 925 rt->mf6c_next = mf6ctable[hash]; 926 mf6ctable[hash] = rt; 927 } 928 } 929 splx(s); 930 return 0; 931 } 932 933 #ifdef UPCALL_TIMING 934 /* 935 * collect delay statistics on the upcalls 936 */ 937 static void 938 collate(struct timeval *t) 939 { 940 u_long d; 941 struct timeval tp; 942 u_long delta; 943 944 GET_TIME(tp); 945 946 if (TV_LT(*t, tp)) 947 { 948 TV_DELTA(tp, *t, delta); 949 950 d = delta >> 10; 951 if (d > UPCALL_MAX) 952 d = UPCALL_MAX; 953 954 ++upcall_data[d]; 955 } 956 } 957 #endif /* UPCALL_TIMING */ 958 959 /* 960 * Delete an mfc entry 961 */ 962 static int 963 del_m6fc(struct mf6cctl *mfccp) 964 { 965 struct sockaddr_in6 origin; 966 struct sockaddr_in6 mcastgrp; 967 struct mf6c *rt; 968 struct mf6c **nptr; 969 u_long hash; 970 int s; 971 972 origin = mfccp->mf6cc_origin; 973 mcastgrp = mfccp->mf6cc_mcastgrp; 974 hash = MF6CHASH(origin.sin6_addr, mcastgrp.sin6_addr); 975 976 #ifdef MRT6DEBUG 977 if (mrt6debug & DEBUG_MFC) { 978 char ip6bufo[INET6_ADDRSTRLEN], ip6bufm[INET6_ADDRSTRLEN]; 979 log(LOG_DEBUG,"del_m6fc orig %s mcastgrp %s\n", 980 IN6_PRINT(ip6bufo, &origin.sin6_addr), 981 IN6_PRINT(ip6bufm, &mcastgrp.sin6_addr)); 982 } 983 #endif 984 985 s = splsoftnet(); 986 987 nptr = &mf6ctable[hash]; 988 while ((rt = *nptr) != NULL) { 989 if (IN6_ARE_ADDR_EQUAL(&origin.sin6_addr, 990 &rt->mf6c_origin.sin6_addr) && 991 IN6_ARE_ADDR_EQUAL(&mcastgrp.sin6_addr, 992 &rt->mf6c_mcastgrp.sin6_addr) && 993 rt->mf6c_stall == NULL) 994 break; 995 996 nptr = &rt->mf6c_next; 997 } 998 if (rt == NULL) { 999 splx(s); 1000 return EADDRNOTAVAIL; 1001 } 1002 1003 *nptr = rt->mf6c_next; 1004 free(rt, M_MRTABLE); 1005 1006 splx(s); 1007 1008 return 0; 1009 } 1010 1011 static int 1012 socket_send(struct socket *s, struct mbuf *mm, struct sockaddr_in6 *src) 1013 { 1014 if (s) { 1015 if (sbappendaddr(&s->so_rcv, sin6tosa(src), mm, NULL) != 0) { 1016 sorwakeup(s); 1017 return 0; 1018 } 1019 soroverflow(s); 1020 } 1021 m_freem(mm); 1022 return -1; 1023 } 1024 1025 /* 1026 * IPv6 multicast forwarding function. This function assumes that the packet 1027 * pointed to by "ip6" has arrived on (or is about to be sent to) the interface 1028 * pointed to by "ifp", and the packet is to be relayed to other networks 1029 * that have members of the packet's destination IPv6 multicast group. 1030 * 1031 * The packet is returned unscathed to the caller, unless it is 1032 * erroneous, in which case a non-zero return value tells the caller to 1033 * discard it. 1034 */ 1035 int 1036 ip6_mforward(struct ip6_hdr *ip6, struct ifnet *ifp, struct mbuf *m) 1037 { 1038 struct mf6c *rt; 1039 struct mif6 *mifp; 1040 struct mbuf *mm; 1041 int s; 1042 mifi_t mifi; 1043 struct sockaddr_in6 sin6; 1044 char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN]; 1045 1046 #ifdef MRT6DEBUG 1047 if (mrt6debug & DEBUG_FORWARD) 1048 log(LOG_DEBUG, "ip6_mforward: src %s, dst %s, ifindex %d\n", 1049 IN6_PRINT(ip6bufs, &ip6->ip6_src), 1050 IN6_PRINT(ip6bufd, &ip6->ip6_dst), 1051 ifp->if_index); 1052 #endif 1053 1054 /* 1055 * Don't forward a packet with Hop limit of zero or one, 1056 * or a packet destined to a local-only group. 1057 */ 1058 if (ip6->ip6_hlim <= 1 || IN6_IS_ADDR_MC_NODELOCAL(&ip6->ip6_dst) || 1059 IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst)) 1060 return 0; 1061 ip6->ip6_hlim--; 1062 1063 /* 1064 * Source address check: do not forward packets with unspecified 1065 * source. It was discussed in July 2000, on ipngwg mailing list. 1066 * This is rather more serious than unicast cases, because some 1067 * MLD packets can be sent with the unspecified source address 1068 * (although such packets must normally set the hop limit field to 1). 1069 */ 1070 if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) { 1071 IP6_STATINC(IP6_STAT_CANTFORWARD); 1072 if (ip6_log_time + ip6_log_interval < time_uptime) { 1073 ip6_log_time = time_uptime; 1074 log(LOG_DEBUG, 1075 "cannot forward " 1076 "from %s to %s nxt %d received on %s\n", 1077 IN6_PRINT(ip6bufs, &ip6->ip6_src), 1078 IN6_PRINT(ip6bufd, &ip6->ip6_dst), 1079 ip6->ip6_nxt, 1080 m->m_pkthdr.rcvif_index ? 1081 if_name(m_get_rcvif_NOMPSAFE(m)) : "?"); 1082 } 1083 return 0; 1084 } 1085 1086 /* 1087 * Determine forwarding mifs from the forwarding cache table 1088 */ 1089 s = splsoftnet(); 1090 MF6CFIND(ip6->ip6_src, ip6->ip6_dst, rt); 1091 1092 /* Entry exists, so forward if necessary */ 1093 if (rt) { 1094 splx(s); 1095 return ip6_mdq(m, ifp, rt); 1096 } else { 1097 /* 1098 * If we don't have a route for packet's origin, make a copy 1099 * of the packet and send message to routing daemon. 1100 */ 1101 1102 struct mbuf *mb0; 1103 struct rtdetq *rte; 1104 u_long hash; 1105 1106 #ifdef UPCALL_TIMING 1107 struct timeval tp; 1108 GET_TIME(tp); 1109 #endif 1110 1111 mrt6stat.mrt6s_no_route++; 1112 #ifdef MRT6DEBUG 1113 if (mrt6debug & (DEBUG_FORWARD | DEBUG_MFC)) 1114 log(LOG_DEBUG, "ip6_mforward: no rte s %s g %s\n", 1115 IN6_PRINT(ip6bufs, &ip6->ip6_src), 1116 IN6_PRINT(ip6bufd, &ip6->ip6_dst)); 1117 #endif 1118 1119 /* 1120 * Allocate mbufs early so that we don't do extra work if we 1121 * are just going to fail anyway. 1122 */ 1123 rte = malloc(sizeof(*rte), M_MRTABLE, M_NOWAIT); 1124 if (rte == NULL) { 1125 splx(s); 1126 return ENOBUFS; 1127 } 1128 mb0 = m_copym(m, 0, M_COPYALL, M_DONTWAIT); 1129 1130 /* 1131 * Pullup packet header if needed before storing it, 1132 * as other references may modify it in the meantime. 1133 */ 1134 if (mb0 && M_UNWRITABLE(mb0, sizeof(struct ip6_hdr))) 1135 mb0 = m_pullup(mb0, sizeof(struct ip6_hdr)); 1136 if (mb0 == NULL) { 1137 free(rte, M_MRTABLE); 1138 splx(s); 1139 return ENOBUFS; 1140 } 1141 1142 /* is there an upcall waiting for this packet? */ 1143 hash = MF6CHASH(ip6->ip6_src, ip6->ip6_dst); 1144 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 1145 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, 1146 &rt->mf6c_origin.sin6_addr) && 1147 IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, 1148 &rt->mf6c_mcastgrp.sin6_addr) && 1149 (rt->mf6c_stall != NULL)) 1150 break; 1151 } 1152 1153 if (rt == NULL) { 1154 struct mrt6msg *im; 1155 struct omrt6msg *oim; 1156 1157 /* no upcall, so make a new entry */ 1158 rt = malloc(sizeof(*rt), M_MRTABLE, M_NOWAIT); 1159 if (rt == NULL) { 1160 free(rte, M_MRTABLE); 1161 m_freem(mb0); 1162 splx(s); 1163 return ENOBUFS; 1164 } 1165 1166 /* 1167 * Make a copy of the header to send to the user 1168 * level process 1169 */ 1170 mm = m_copym(mb0, 0, sizeof(struct ip6_hdr), M_DONTWAIT); 1171 1172 if (mm == NULL) { 1173 free(rte, M_MRTABLE); 1174 m_freem(mb0); 1175 free(rt, M_MRTABLE); 1176 splx(s); 1177 return ENOBUFS; 1178 } 1179 1180 /* 1181 * Send message to routing daemon 1182 */ 1183 sockaddr_in6_init(&sin6, &ip6->ip6_src, 0, 0, 0); 1184 1185 im = NULL; 1186 oim = NULL; 1187 switch (ip6_mrouter_ver) { 1188 case MRT6_OINIT: 1189 oim = mtod(mm, struct omrt6msg *); 1190 oim->im6_msgtype = MRT6MSG_NOCACHE; 1191 oim->im6_mbz = 0; 1192 break; 1193 case MRT6_INIT: 1194 im = mtod(mm, struct mrt6msg *); 1195 im->im6_msgtype = MRT6MSG_NOCACHE; 1196 im->im6_mbz = 0; 1197 break; 1198 default: 1199 free(rte, M_MRTABLE); 1200 m_freem(mb0); 1201 free(rt, M_MRTABLE); 1202 splx(s); 1203 return EINVAL; 1204 } 1205 1206 #ifdef MRT6DEBUG 1207 if (mrt6debug & DEBUG_FORWARD) 1208 log(LOG_DEBUG, 1209 "getting the iif info in the kernel\n"); 1210 #endif 1211 1212 for (mifp = mif6table, mifi = 0; 1213 mifi < nummifs && mifp->m6_ifp != ifp; 1214 mifp++, mifi++) 1215 ; 1216 1217 switch (ip6_mrouter_ver) { 1218 case MRT6_OINIT: 1219 oim->im6_mif = mifi; 1220 break; 1221 case MRT6_INIT: 1222 im->im6_mif = mifi; 1223 break; 1224 } 1225 1226 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1227 log(LOG_WARNING, "ip6_mforward: ip6_mrouter " 1228 "socket queue full\n"); 1229 mrt6stat.mrt6s_upq_sockfull++; 1230 free(rte, M_MRTABLE); 1231 m_freem(mb0); 1232 free(rt, M_MRTABLE); 1233 splx(s); 1234 return ENOBUFS; 1235 } 1236 1237 mrt6stat.mrt6s_upcalls++; 1238 1239 /* insert new entry at head of hash chain */ 1240 memset(rt, 0, sizeof(*rt)); 1241 sockaddr_in6_init(&rt->mf6c_origin, &ip6->ip6_src, 1242 0, 0, 0); 1243 sockaddr_in6_init(&rt->mf6c_mcastgrp, &ip6->ip6_dst, 1244 0, 0, 0); 1245 rt->mf6c_expire = UPCALL_EXPIRE; 1246 n6expire[hash]++; 1247 rt->mf6c_parent = MF6C_INCOMPLETE_PARENT; 1248 1249 /* link into table */ 1250 rt->mf6c_next = mf6ctable[hash]; 1251 mf6ctable[hash] = rt; 1252 /* Add this entry to the end of the queue */ 1253 rt->mf6c_stall = rte; 1254 } else { 1255 /* determine if q has overflowed */ 1256 struct rtdetq **p; 1257 int npkts = 0; 1258 1259 for (p = &rt->mf6c_stall; *p != NULL; p = &(*p)->next) { 1260 if (++npkts > MAX_UPQ6) { 1261 mrt6stat.mrt6s_upq_ovflw++; 1262 free(rte, M_MRTABLE); 1263 m_freem(mb0); 1264 splx(s); 1265 return 0; 1266 } 1267 } 1268 1269 /* Add this entry to the end of the queue */ 1270 *p = rte; 1271 } 1272 1273 rte->next = NULL; 1274 rte->m = mb0; 1275 rte->ifp = ifp; 1276 #ifdef UPCALL_TIMING 1277 rte->t = tp; 1278 #endif 1279 1280 splx(s); 1281 1282 return 0; 1283 } 1284 } 1285 1286 /* 1287 * Clean up cache entries if upcalls are not serviced 1288 * Call from the Slow Timeout mechanism, every 0.25 seconds. 1289 */ 1290 static void 1291 expire_upcalls(void *unused) 1292 { 1293 struct rtdetq *rte; 1294 struct mf6c *mfc, **nptr; 1295 int i; 1296 1297 /* XXX NOMPSAFE still need softnet_lock */ 1298 mutex_enter(softnet_lock); 1299 KERNEL_LOCK(1, NULL); 1300 1301 for (i = 0; i < MF6CTBLSIZ; i++) { 1302 if (n6expire[i] == 0) 1303 continue; 1304 nptr = &mf6ctable[i]; 1305 while ((mfc = *nptr) != NULL) { 1306 rte = mfc->mf6c_stall; 1307 /* 1308 * Skip real cache entries 1309 * Make sure it wasn't marked to not expire (shouldn't happen) 1310 * If it expires now 1311 */ 1312 if (rte != NULL && 1313 mfc->mf6c_expire != 0 && 1314 --mfc->mf6c_expire == 0) { 1315 #ifdef MRT6DEBUG 1316 if (mrt6debug & DEBUG_EXPIRE) { 1317 char ip6bufo[INET6_ADDRSTRLEN]; 1318 char ip6bufm[INET6_ADDRSTRLEN]; 1319 log(LOG_DEBUG, 1320 "expire_upcalls: expiring (%s %s)\n", 1321 IN6_PRINT(ip6bufo, 1322 &mfc->mf6c_origin.sin6_addr), 1323 IN6_PRINT(ip6bufm, 1324 &mfc->mf6c_mcastgrp.sin6_addr)); 1325 } 1326 #endif 1327 /* 1328 * drop all the packets 1329 * free the mbuf with the pkt, if, timing info 1330 */ 1331 do { 1332 struct rtdetq *n = rte->next; 1333 m_freem(rte->m); 1334 free(rte, M_MRTABLE); 1335 rte = n; 1336 } while (rte != NULL); 1337 mrt6stat.mrt6s_cache_cleanups++; 1338 n6expire[i]--; 1339 1340 *nptr = mfc->mf6c_next; 1341 free(mfc, M_MRTABLE); 1342 } else { 1343 nptr = &mfc->mf6c_next; 1344 } 1345 } 1346 } 1347 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 1348 expire_upcalls, NULL); 1349 1350 KERNEL_UNLOCK_ONE(NULL); 1351 mutex_exit(softnet_lock); 1352 } 1353 1354 /* 1355 * Macro to send packet on mif. Since RSVP packets don't get counted on 1356 * input, they shouldn't get counted on output, so statistics keeping is 1357 * separate. 1358 */ 1359 #define MC6_SEND(ip6, mifp, m) do { \ 1360 if ((mifp)->m6_flags & MIFF_REGISTER) \ 1361 register_send((ip6), (mifp), (m)); \ 1362 else \ 1363 phyint_send((ip6), (mifp), (m)); \ 1364 } while (/*CONSTCOND*/ 0) 1365 1366 /* 1367 * Packet forwarding routine once entry in the cache is made 1368 */ 1369 static int 1370 ip6_mdq(struct mbuf *m, struct ifnet *ifp, struct mf6c *rt) 1371 { 1372 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 1373 mifi_t mifi, iif; 1374 struct mif6 *mifp; 1375 int plen = m->m_pkthdr.len; 1376 struct in6_addr src0, dst0; /* copies for local work */ 1377 u_int32_t iszone, idzone, oszone, odzone; 1378 int error = 0; 1379 1380 /* 1381 * Don't forward if it didn't arrive from the parent mif 1382 * for its origin. 1383 */ 1384 mifi = rt->mf6c_parent; 1385 if ((mifi >= nummifs) || (mif6table[mifi].m6_ifp != ifp)) { 1386 /* came in the wrong interface */ 1387 #ifdef MRT6DEBUG 1388 if (mrt6debug & DEBUG_FORWARD) 1389 log(LOG_DEBUG, 1390 "wrong if: ifid %d mifi %d mififid %x\n", 1391 ifp->if_index, mifi, 1392 mif6table[mifi].m6_ifp ? 1393 mif6table[mifi].m6_ifp->if_index : -1); 1394 #endif 1395 mrt6stat.mrt6s_wrong_if++; 1396 rt->mf6c_wrong_if++; 1397 1398 /* 1399 * If we are doing PIM processing, and we are forwarding 1400 * packets on this interface, send a message to the 1401 * routing daemon. 1402 */ 1403 /* have to make sure this is a valid mif */ 1404 if (mifi < nummifs && mif6table[mifi].m6_ifp) { 1405 if (pim6 && (m->m_flags & M_LOOP) == 0) { 1406 /* 1407 * Check the M_LOOP flag to avoid an 1408 * unnecessary PIM assert. 1409 * XXX: M_LOOP is an ad-hoc hack... 1410 */ 1411 struct sockaddr_in6 sin6; 1412 1413 struct mbuf *mm; 1414 struct mrt6msg *im; 1415 struct omrt6msg *oim; 1416 1417 mm = m_copym(m, 0, sizeof(struct ip6_hdr), M_DONTWAIT); 1418 if (mm && M_UNWRITABLE(mm, sizeof(struct ip6_hdr))) 1419 mm = m_pullup(mm, sizeof(struct ip6_hdr)); 1420 if (mm == NULL) 1421 return ENOBUFS; 1422 1423 oim = NULL; 1424 im = NULL; 1425 switch (ip6_mrouter_ver) { 1426 case MRT6_OINIT: 1427 oim = mtod(mm, struct omrt6msg *); 1428 oim->im6_msgtype = MRT6MSG_WRONGMIF; 1429 oim->im6_mbz = 0; 1430 break; 1431 case MRT6_INIT: 1432 im = mtod(mm, struct mrt6msg *); 1433 im->im6_msgtype = MRT6MSG_WRONGMIF; 1434 im->im6_mbz = 0; 1435 break; 1436 default: 1437 m_freem(mm); 1438 return EINVAL; 1439 } 1440 1441 for (mifp = mif6table, iif = 0; 1442 iif < nummifs && mifp && 1443 mifp->m6_ifp != ifp; 1444 mifp++, iif++) 1445 ; 1446 1447 memset(&sin6, 0, sizeof(sin6)); 1448 sin6.sin6_len = sizeof(sin6); 1449 sin6.sin6_family = AF_INET6; 1450 switch (ip6_mrouter_ver) { 1451 case MRT6_OINIT: 1452 oim->im6_mif = iif; 1453 sin6.sin6_addr = oim->im6_src; 1454 break; 1455 case MRT6_INIT: 1456 im->im6_mif = iif; 1457 sin6.sin6_addr = im->im6_src; 1458 break; 1459 } 1460 1461 mrt6stat.mrt6s_upcalls++; 1462 1463 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1464 #ifdef MRT6DEBUG 1465 if (mrt6debug) 1466 log(LOG_WARNING, "mdq, ip6_mrouter socket queue full\n"); 1467 #endif 1468 ++mrt6stat.mrt6s_upq_sockfull; 1469 return ENOBUFS; 1470 } 1471 } 1472 } 1473 1474 return 0; 1475 } 1476 1477 /* If I sourced this packet, it counts as output, else it was input. */ 1478 if (m->m_pkthdr.rcvif_index == 0) { 1479 /* XXX: is rcvif really NULL when output?? */ 1480 mif6table[mifi].m6_pkt_out++; 1481 mif6table[mifi].m6_bytes_out += plen; 1482 } else { 1483 mif6table[mifi].m6_pkt_in++; 1484 mif6table[mifi].m6_bytes_in += plen; 1485 } 1486 rt->mf6c_pkt_cnt++; 1487 rt->mf6c_byte_cnt += plen; 1488 1489 /* 1490 * For each mif, forward a copy of the packet if there are group 1491 * members downstream on the interface. 1492 */ 1493 src0 = ip6->ip6_src; 1494 dst0 = ip6->ip6_dst; 1495 if ((error = in6_setscope(&src0, ifp, &iszone)) != 0 || 1496 (error = in6_setscope(&dst0, ifp, &idzone)) != 0) { 1497 IP6_STATINC(IP6_STAT_BADSCOPE); 1498 return error; 1499 } 1500 for (mifp = mif6table, mifi = 0; mifi < nummifs; mifp++, mifi++) { 1501 if (IF_ISSET(mifi, &rt->mf6c_ifset)) { 1502 if (mif6table[mifi].m6_ifp == NULL) 1503 continue; 1504 /* 1505 * check if the outgoing packet is going to break 1506 * a scope boundary. 1507 * XXX: For packets through PIM register tunnel 1508 * interface, we believe the routing daemon. 1509 */ 1510 if ((mif6table[rt->mf6c_parent].m6_flags & 1511 MIFF_REGISTER) == 0 && 1512 (mif6table[mifi].m6_flags & MIFF_REGISTER) == 0) { 1513 if (in6_setscope(&src0, mif6table[mifi].m6_ifp, 1514 &oszone) || 1515 in6_setscope(&dst0, mif6table[mifi].m6_ifp, 1516 &odzone) || 1517 iszone != oszone || idzone != odzone) { 1518 IP6_STATINC(IP6_STAT_BADSCOPE); 1519 continue; 1520 } 1521 } 1522 1523 mifp->m6_pkt_out++; 1524 mifp->m6_bytes_out += plen; 1525 MC6_SEND(ip6, mifp, m); 1526 } 1527 } 1528 1529 return 0; 1530 } 1531 1532 static void 1533 phyint_send(struct ip6_hdr *ip6, struct mif6 *mifp, struct mbuf *m) 1534 { 1535 struct mbuf *mb_copy; 1536 struct ifnet *ifp = mifp->m6_ifp; 1537 int error __mrt6debugused = 0; 1538 int s; 1539 static struct route ro; 1540 bool ingroup; 1541 struct sockaddr_in6 dst6; 1542 u_long linkmtu; 1543 1544 s = splsoftnet(); 1545 1546 /* 1547 * Make a new reference to the packet; make sure that 1548 * the IPv6 header is actually copied, not just referenced, 1549 * so that ip6_output() only scribbles on the copy. 1550 */ 1551 mb_copy = m_copym(m, 0, M_COPYALL, M_DONTWAIT); 1552 if (mb_copy && M_UNWRITABLE(mb_copy, sizeof(struct ip6_hdr))) 1553 mb_copy = m_pullup(mb_copy, sizeof(struct ip6_hdr)); 1554 if (mb_copy == NULL) { 1555 splx(s); 1556 return; 1557 } 1558 1559 /* set MCAST flag to the outgoing packet */ 1560 mb_copy->m_flags |= M_MCAST; 1561 1562 /* 1563 * If we sourced the packet, call ip6_output since we may divide 1564 * the packet into fragments when the packet is too big for the 1565 * outgoing interface. 1566 * Otherwise, we can simply send the packet to the interface 1567 * sending queue. 1568 */ 1569 if (m->m_pkthdr.rcvif_index == 0) { 1570 struct ip6_moptions im6o; 1571 1572 im6o.im6o_multicast_if_index = if_get_index(ifp); 1573 /* XXX: ip6_output will override ip6->ip6_hlim */ 1574 im6o.im6o_multicast_hlim = ip6->ip6_hlim; 1575 im6o.im6o_multicast_loop = 1; 1576 error = ip6_output(mb_copy, NULL, &ro, IPV6_FORWARDING, 1577 &im6o, NULL, NULL); 1578 1579 #ifdef MRT6DEBUG 1580 if (mrt6debug & DEBUG_XMIT) 1581 log(LOG_DEBUG, "phyint_send on mif %td err %d\n", 1582 mifp - mif6table, error); 1583 #endif 1584 splx(s); 1585 return; 1586 } 1587 1588 /* 1589 * If we belong to the destination multicast group 1590 * on the outgoing interface, loop back a copy. 1591 */ 1592 /* 1593 * Does not have to check source info, as it's alreay covered by 1594 * ip6_input 1595 */ 1596 sockaddr_in6_init(&dst6, &ip6->ip6_dst, 0, 0, 0); 1597 1598 ingroup = in6_multi_group(&ip6->ip6_dst, ifp); 1599 if (ingroup) { 1600 ip6_mloopback(ifp, m, 1601 satocsin6(rtcache_getdst(&ro))); 1602 } 1603 1604 /* 1605 * Put the packet into the sending queue of the outgoing interface 1606 * if it would fit in the MTU of the interface. 1607 */ 1608 linkmtu = IN6_LINKMTU(ifp); 1609 if (mb_copy->m_pkthdr.len <= linkmtu || linkmtu < IPV6_MMTU) { 1610 error = ip6_if_output(ifp, ifp, mb_copy, &dst6, NULL); 1611 #ifdef MRT6DEBUG 1612 if (mrt6debug & DEBUG_XMIT) 1613 log(LOG_DEBUG, "phyint_send on mif %td err %d\n", 1614 mifp - mif6table, error); 1615 #endif 1616 } else { 1617 /* 1618 * pMTU discovery is intentionally disabled by default, since 1619 * various routers may notify pMTU in multicast, which can be 1620 * a DDoS to a router. 1621 */ 1622 if (ip6_mcast_pmtu) { 1623 icmp6_error(mb_copy, ICMP6_PACKET_TOO_BIG, 0, linkmtu); 1624 } else { 1625 /* simply discard the packet */ 1626 #ifdef MRT6DEBUG 1627 if (mrt6debug & DEBUG_XMIT) { 1628 char ip6bufs[INET6_ADDRSTRLEN]; 1629 char ip6bufd[INET6_ADDRSTRLEN]; 1630 log(LOG_DEBUG, 1631 "phyint_send: packet too big on %s o %s g %s" 1632 " size %d(discarded)\n", 1633 if_name(ifp), 1634 IN6_PRINT(ip6bufs, &ip6->ip6_src), 1635 IN6_PRINT(ip6bufd, &ip6->ip6_dst), 1636 mb_copy->m_pkthdr.len); 1637 } 1638 #endif 1639 m_freem(mb_copy); 1640 } 1641 } 1642 1643 splx(s); 1644 } 1645 1646 static int 1647 register_send(struct ip6_hdr *ip6, struct mif6 *mif, struct mbuf *m) 1648 { 1649 struct mbuf *mm; 1650 int i, len = m->m_pkthdr.len; 1651 struct sockaddr_in6 sin6; 1652 struct mrt6msg *im6; 1653 1654 #ifdef MRT6DEBUG 1655 if (mrt6debug) { 1656 char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN]; 1657 log(LOG_DEBUG, "** IPv6 register_send **\n src %s dst %s\n", 1658 IN6_PRINT(ip6bufs, &ip6->ip6_src), 1659 IN6_PRINT(ip6bufd, &ip6->ip6_dst)); 1660 } 1661 #endif 1662 PIM6_STATINC(PIM6_STAT_SND_REGISTERS); 1663 1664 /* Make a copy of the packet to send to the user level process */ 1665 MGETHDR(mm, M_DONTWAIT, MT_HEADER); 1666 if (mm == NULL) 1667 return ENOBUFS; 1668 mm->m_data += max_linkhdr; 1669 mm->m_len = sizeof(struct ip6_hdr); 1670 1671 if ((mm->m_next = m_copym(m, 0, M_COPYALL, M_DONTWAIT)) == NULL) { 1672 m_freem(mm); 1673 return ENOBUFS; 1674 } 1675 i = MHLEN - M_LEADINGSPACE(mm); 1676 if (i > len) 1677 i = len; 1678 mm = m_pullup(mm, i); 1679 if (mm == NULL) 1680 return ENOBUFS; 1681 mm->m_pkthdr.len = len + sizeof(struct ip6_hdr); 1682 1683 /* 1684 * Send message to routing daemon 1685 */ 1686 sockaddr_in6_init(&sin6, &ip6->ip6_src, 0, 0, 0); 1687 1688 im6 = mtod(mm, struct mrt6msg *); 1689 im6->im6_msgtype = MRT6MSG_WHOLEPKT; 1690 im6->im6_mbz = 0; 1691 im6->im6_mif = mif - mif6table; 1692 1693 /* iif info is not given for reg. encap.n */ 1694 mrt6stat.mrt6s_upcalls++; 1695 1696 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1697 #ifdef MRT6DEBUG 1698 if (mrt6debug) 1699 log(LOG_WARNING, 1700 "register_send: ip6_mrouter socket queue full\n"); 1701 #endif 1702 ++mrt6stat.mrt6s_upq_sockfull; 1703 return ENOBUFS; 1704 } 1705 1706 return 0; 1707 } 1708 1709 /* 1710 * PIM sparse mode hook. Receives the pim control messages, and passes them up 1711 * to the listening socket, using rip6_input. 1712 * 1713 * The only message processed is the REGISTER pim message; the pim header 1714 * is stripped off, and the inner packet is passed to register_mforward. 1715 */ 1716 int 1717 pim6_input(struct mbuf **mp, int *offp, int proto) 1718 { 1719 struct pim *pim; 1720 struct ip6_hdr *ip6 __mrt6debugused; 1721 int pimlen; 1722 struct mbuf *m = *mp; 1723 int minlen; 1724 int off = *offp; 1725 1726 PIM6_STATINC(PIM6_STAT_RCV_TOTAL); 1727 1728 ip6 = mtod(m, struct ip6_hdr *); 1729 pimlen = m->m_pkthdr.len - off; 1730 1731 /* 1732 * Validate lengths 1733 */ 1734 if (pimlen < PIM_MINLEN) { 1735 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1736 #ifdef MRT6DEBUG 1737 if (mrt6debug & DEBUG_PIM) 1738 log(LOG_DEBUG,"pim6_input: PIM packet too short\n"); 1739 #endif 1740 m_freem(m); 1741 return IPPROTO_DONE; 1742 } 1743 1744 /* 1745 * If the packet is at least as big as a REGISTER, go ahead 1746 * and grab the PIM REGISTER header size, to avoid another 1747 * possible m_pullup() later. 1748 * 1749 * PIM_MINLEN == pimhdr + u_int32 == 8 1750 * PIM6_REG_MINLEN == pimhdr + reghdr + eip6hdr == 4 + 4 + 40 1751 */ 1752 minlen = (pimlen >= PIM6_REG_MINLEN) ? PIM6_REG_MINLEN : PIM_MINLEN; 1753 1754 /* 1755 * Make sure that the IP6 and PIM headers in contiguous memory, and 1756 * possibly the PIM REGISTER header 1757 */ 1758 IP6_EXTHDR_GET(pim, struct pim *, m, off, minlen); 1759 if (pim == NULL) { 1760 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1761 return IPPROTO_DONE; 1762 } 1763 1764 /* PIM version check */ 1765 if (pim->pim_ver != PIM_VERSION) { 1766 PIM6_STATINC(PIM6_STAT_RCV_BADVERSION); 1767 #ifdef MRT6DEBUG 1768 log(LOG_ERR, 1769 "pim6_input: incorrect version %d, expecting %d\n", 1770 pim->pim_ver, PIM_VERSION); 1771 #endif 1772 m_freem(m); 1773 return IPPROTO_DONE; 1774 } 1775 1776 #define PIM6_CHECKSUM 1777 #ifdef PIM6_CHECKSUM 1778 { 1779 int cksumlen; 1780 1781 /* 1782 * Validate checksum. 1783 * If PIM REGISTER, exclude the data packet 1784 */ 1785 if (pim->pim_type == PIM_REGISTER) 1786 cksumlen = PIM_MINLEN; 1787 else 1788 cksumlen = pimlen; 1789 1790 if (in6_cksum(m, IPPROTO_PIM, off, cksumlen)) { 1791 PIM6_STATINC(PIM6_STAT_RCV_BADSUM); 1792 #ifdef MRT6DEBUG 1793 if (mrt6debug & DEBUG_PIM) 1794 log(LOG_DEBUG, 1795 "pim6_input: invalid checksum\n"); 1796 #endif 1797 m_freem(m); 1798 return IPPROTO_DONE; 1799 } 1800 } 1801 #endif /* PIM_CHECKSUM */ 1802 1803 if (pim->pim_type == PIM_REGISTER) { 1804 /* 1805 * since this is a REGISTER, we'll make a copy of the register 1806 * headers ip6+pim+u_int32_t+encap_ip6, to be passed up to the 1807 * routing daemon. 1808 */ 1809 static const struct sockaddr_in6 dst = { 1810 .sin6_len = sizeof(dst), 1811 .sin6_family = AF_INET6, 1812 }; 1813 1814 struct mbuf *mcp; 1815 struct ip6_hdr *eip6; 1816 u_int32_t *reghdr; 1817 1818 PIM6_STATINC(PIM6_STAT_RCV_REGISTERS); 1819 1820 if ((reg_mif_num >= nummifs) || (reg_mif_num == (mifi_t) -1)) { 1821 #ifdef MRT6DEBUG 1822 if (mrt6debug & DEBUG_PIM) 1823 log(LOG_DEBUG, 1824 "pim6_input: register mif not set: %d\n", 1825 reg_mif_num); 1826 #endif 1827 m_freem(m); 1828 return IPPROTO_DONE; 1829 } 1830 1831 reghdr = (u_int32_t *)(pim + 1); 1832 1833 if ((ntohl(*reghdr) & PIM_NULL_REGISTER)) 1834 goto pim6_input_to_daemon; 1835 1836 /* 1837 * Validate length 1838 */ 1839 if (pimlen < PIM6_REG_MINLEN) { 1840 #ifdef MRT6DEBUG 1841 char ip6buf[INET6_ADDRSTRLEN]; 1842 log(LOG_ERR, 1843 "pim6_input: register packet size too " 1844 "small %d from %s\n", 1845 pimlen, IN6_PRINT(ip6buf, &ip6->ip6_src)); 1846 #endif 1847 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1848 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1849 m_freem(m); 1850 return IPPROTO_DONE; 1851 } 1852 1853 eip6 = (struct ip6_hdr *)(reghdr + 1); 1854 #ifdef MRT6DEBUG 1855 if (mrt6debug & DEBUG_PIM) { 1856 char ip6bufs[INET6_ADDRSTRLEN]; 1857 char ip6bufd[INET6_ADDRSTRLEN]; 1858 log(LOG_DEBUG, 1859 "pim6_input[register], eip6: %s -> %s, " 1860 "eip6 plen %d\n", 1861 IN6_PRINT(ip6bufs, &eip6->ip6_src), 1862 IN6_PRINT(ip6bufd, &eip6->ip6_dst), 1863 ntohs(eip6->ip6_plen)); 1864 } 1865 #endif 1866 1867 /* verify the version number of the inner packet */ 1868 if ((eip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) { 1869 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1870 #ifdef MRT6DEBUG 1871 log(LOG_DEBUG, "pim6_input: invalid IP version (%d) " 1872 "of the inner packet\n", 1873 (eip6->ip6_vfc & IPV6_VERSION)); 1874 #endif 1875 m_freem(m); 1876 return IPPROTO_DONE; 1877 } 1878 1879 /* verify the inner packet is destined to a mcast group */ 1880 if (!IN6_IS_ADDR_MULTICAST(&eip6->ip6_dst)) { 1881 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1882 #ifdef MRT6DEBUG 1883 if (mrt6debug & DEBUG_PIM) { 1884 char ip6buf[INET6_ADDRSTRLEN]; 1885 log(LOG_DEBUG, 1886 "pim6_input: inner packet of register " 1887 "is not multicast %s\n", 1888 IN6_PRINT(ip6buf, &eip6->ip6_dst)); 1889 } 1890 #endif 1891 m_freem(m); 1892 return IPPROTO_DONE; 1893 } 1894 1895 /* 1896 * make a copy of the whole header to pass to the daemon later. 1897 */ 1898 mcp = m_copym(m, 0, off + PIM6_REG_MINLEN, M_DONTWAIT); 1899 if (mcp == NULL) { 1900 #ifdef MRT6DEBUG 1901 log(LOG_ERR, 1902 "pim6_input: pim register: " 1903 "could not copy register head\n"); 1904 #endif 1905 m_freem(m); 1906 return IPPROTO_DONE; 1907 } 1908 1909 /* 1910 * forward the inner ip6 packet; point m_data at the inner ip6. 1911 */ 1912 m_adj(m, off + PIM_MINLEN); 1913 #ifdef MRT6DEBUG 1914 if (mrt6debug & DEBUG_PIM) { 1915 char ip6bufs[INET6_ADDRSTRLEN]; 1916 char ip6bufd[INET6_ADDRSTRLEN]; 1917 log(LOG_DEBUG, 1918 "pim6_input: forwarding decapsulated register: " 1919 "src %s, dst %s, mif %d\n", 1920 IN6_PRINT(ip6bufs, &eip6->ip6_src), 1921 IN6_PRINT(ip6bufd, &eip6->ip6_dst), 1922 reg_mif_num); 1923 } 1924 #endif 1925 1926 looutput(mif6table[reg_mif_num].m6_ifp, m, sin6tocsa(&dst), 1927 NULL); 1928 1929 /* prepare the register head to send to the mrouting daemon */ 1930 m = mcp; 1931 } 1932 1933 /* 1934 * Pass the PIM message up to the daemon; if it is a register message 1935 * pass the 'head' only up to the daemon. This includes the 1936 * encapsulator ip6 header, pim header, register header and the 1937 * encapsulated ip6 header. 1938 */ 1939 pim6_input_to_daemon: 1940 rip6_input(&m, offp, proto); 1941 return IPPROTO_DONE; 1942 } 1943 1944 static int 1945 sysctl_net_inet6_pim6_stats(SYSCTLFN_ARGS) 1946 { 1947 1948 return (NETSTAT_SYSCTL(pim6stat_percpu, PIM6_NSTATS)); 1949 } 1950 1951 static void 1952 sysctl_net_inet6_pim6_setup(struct sysctllog **clog) 1953 { 1954 1955 sysctl_createv(clog, 0, NULL, NULL, 1956 CTLFLAG_PERMANENT, 1957 CTLTYPE_NODE, "inet6", NULL, 1958 NULL, 0, NULL, 0, 1959 CTL_NET, PF_INET6, CTL_EOL); 1960 sysctl_createv(clog, 0, NULL, NULL, 1961 CTLFLAG_PERMANENT, 1962 CTLTYPE_NODE, "pim6", 1963 SYSCTL_DESCR("PIMv6 settings"), 1964 NULL, 0, NULL, 0, 1965 CTL_NET, PF_INET6, IPPROTO_PIM, CTL_EOL); 1966 1967 sysctl_createv(clog, 0, NULL, NULL, 1968 CTLFLAG_PERMANENT, 1969 CTLTYPE_STRUCT, "stats", 1970 SYSCTL_DESCR("PIMv6 statistics"), 1971 sysctl_net_inet6_pim6_stats, 0, NULL, 0, 1972 CTL_NET, PF_INET6, IPPROTO_PIM, PIM6CTL_STATS, 1973 CTL_EOL); 1974 } 1975
Indexes created Tue Sep 23 14:10:03 GMT 2025