ip6_mroute.c revision 1.129
1 /* $NetBSD: ip6_mroute.c,v 1.129 2018/06/21 10:37:50 knakahara 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 1.129 2018/06/21 10:37:50 knakahara 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 /* initialize per mif pkt counters */ 689 mifp->m6_pkt_in = 0; 690 mifp->m6_pkt_out = 0; 691 mifp->m6_bytes_in = 0; 692 mifp->m6_bytes_out = 0; 693 splx(s); 694 695 /* Adjust nummifs up if the mifi is higher than nummifs */ 696 if (nummifs <= mifcp->mif6c_mifi) 697 nummifs = mifcp->mif6c_mifi + 1; 698 699 #ifdef MRT6DEBUG 700 if (mrt6debug) 701 log(LOG_DEBUG, 702 "add_mif #%d, phyint %s\n", 703 mifcp->mif6c_mifi, ifp->if_xname); 704 #endif 705 706 return 0; 707 } 708 709 /* 710 * Delete a mif from the mif table 711 */ 712 static int 713 del_m6if(mifi_t *mifip) 714 { 715 struct mif6 *mifp = mif6table + *mifip; 716 mifi_t mifi; 717 struct ifnet *ifp; 718 struct sockaddr_in6 sin6; 719 int s; 720 721 if (*mifip >= nummifs) 722 return EINVAL; 723 if (mifp->m6_ifp == NULL) 724 return EINVAL; 725 726 s = splsoftnet(); 727 728 if (!(mifp->m6_flags & MIFF_REGISTER)) { 729 /* 730 * XXX: what if there is yet IPv4 multicast daemon 731 * using the interface? 732 */ 733 ifp = mifp->m6_ifp; 734 735 sin6.sin6_family = AF_INET6; 736 sin6.sin6_addr = in6addr_any; 737 if_mcast_op(ifp, SIOCDELMULTI, sin6tosa(&sin6)); 738 } else { 739 if (reg_mif_num != (mifi_t)-1) { 740 if_detach(&multicast_register_if6); 741 reg_mif_num = (mifi_t)-1; 742 } 743 } 744 745 memset((void *)mifp, 0, sizeof (*mifp)); 746 747 /* Adjust nummifs down */ 748 for (mifi = nummifs; mifi > 0; mifi--) 749 if (mif6table[mifi - 1].m6_ifp) 750 break; 751 nummifs = mifi; 752 753 splx(s); 754 755 #ifdef MRT6DEBUG 756 if (mrt6debug) 757 log(LOG_DEBUG, "del_m6if %d, nummifs %d\n", *mifip, nummifs); 758 #endif 759 760 return 0; 761 } 762 763 /* 764 * Add an mfc entry 765 */ 766 static int 767 add_m6fc(struct mf6cctl *mfccp) 768 { 769 struct mf6c *rt; 770 u_long hash; 771 struct rtdetq *rte; 772 u_short nstl; 773 int s; 774 char ip6bufo[INET6_ADDRSTRLEN], ip6bufm[INET6_ADDRSTRLEN]; 775 776 MF6CFIND(mfccp->mf6cc_origin.sin6_addr, 777 mfccp->mf6cc_mcastgrp.sin6_addr, rt); 778 779 /* If an entry already exists, just update the fields */ 780 if (rt) { 781 #ifdef MRT6DEBUG 782 if (mrt6debug & DEBUG_MFC) 783 log(LOG_DEBUG,"add_m6fc update o %s g %s p %x\n", 784 IN6_PRINT(ip6bufo, 785 &mfccp->mf6cc_origin.sin6_addr), 786 IN6_PRINT(ip6bufm, 787 &mfccp->mf6cc_mcastgrp.sin6_addr), 788 mfccp->mf6cc_parent); 789 #endif 790 791 s = splsoftnet(); 792 rt->mf6c_parent = mfccp->mf6cc_parent; 793 rt->mf6c_ifset = mfccp->mf6cc_ifset; 794 splx(s); 795 return 0; 796 } 797 798 /* 799 * Find the entry for which the upcall was made and update 800 */ 801 s = splsoftnet(); 802 hash = MF6CHASH(mfccp->mf6cc_origin.sin6_addr, 803 mfccp->mf6cc_mcastgrp.sin6_addr); 804 for (rt = mf6ctable[hash], nstl = 0; rt; rt = rt->mf6c_next) { 805 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 806 &mfccp->mf6cc_origin.sin6_addr) && 807 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 808 &mfccp->mf6cc_mcastgrp.sin6_addr) && 809 (rt->mf6c_stall != NULL)) { 810 811 if (nstl++) 812 log(LOG_ERR, 813 "add_m6fc: %s o %s g %s p %x dbx %p\n", 814 "multiple kernel entries", 815 IN6_PRINT(ip6bufo, 816 &mfccp->mf6cc_origin.sin6_addr), 817 IN6_PRINT(ip6bufm, 818 &mfccp->mf6cc_mcastgrp.sin6_addr), 819 mfccp->mf6cc_parent, rt->mf6c_stall); 820 821 #ifdef MRT6DEBUG 822 if (mrt6debug & DEBUG_MFC) 823 log(LOG_DEBUG, 824 "add_m6fc o %s g %s p %x dbg %p\n", 825 IN6_PRINT(ip6bufo, 826 &mfccp->mf6cc_origin.sin6_addr), 827 IN6_PRINT(ip6bufm, 828 &mfccp->mf6cc_mcastgrp.sin6_addr), 829 mfccp->mf6cc_parent, rt->mf6c_stall); 830 #endif 831 832 rt->mf6c_origin = mfccp->mf6cc_origin; 833 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 834 rt->mf6c_parent = mfccp->mf6cc_parent; 835 rt->mf6c_ifset = mfccp->mf6cc_ifset; 836 /* initialize pkt counters per src-grp */ 837 rt->mf6c_pkt_cnt = 0; 838 rt->mf6c_byte_cnt = 0; 839 rt->mf6c_wrong_if = 0; 840 841 rt->mf6c_expire = 0; /* Don't clean this guy up */ 842 n6expire[hash]--; 843 844 /* free packets Qed at the end of this entry */ 845 for (rte = rt->mf6c_stall; rte != NULL; ) { 846 struct rtdetq *n = rte->next; 847 if (rte->ifp) { 848 ip6_mdq(rte->m, rte->ifp, rt); 849 } 850 m_freem(rte->m); 851 #ifdef UPCALL_TIMING 852 collate(&(rte->t)); 853 #endif 854 free(rte, M_MRTABLE); 855 rte = n; 856 } 857 rt->mf6c_stall = NULL; 858 } 859 } 860 861 /* 862 * It is possible that an entry is being inserted without an upcall 863 */ 864 if (nstl == 0) { 865 #ifdef MRT6DEBUG 866 if (mrt6debug & DEBUG_MFC) 867 log(LOG_DEBUG, 868 "add_mfc no upcall h %ld o %s g %s p %x\n", 869 hash, 870 IN6_PRINT(ip6bufo, 871 &mfccp->mf6cc_origin.sin6_addr), 872 IN6_PRINT(ip6bufm, 873 &mfccp->mf6cc_mcastgrp.sin6_addr), 874 mfccp->mf6cc_parent); 875 #endif 876 877 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 878 879 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 880 &mfccp->mf6cc_origin.sin6_addr)&& 881 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 882 &mfccp->mf6cc_mcastgrp.sin6_addr)) { 883 884 rt->mf6c_origin = mfccp->mf6cc_origin; 885 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 886 rt->mf6c_parent = mfccp->mf6cc_parent; 887 rt->mf6c_ifset = mfccp->mf6cc_ifset; 888 /* initialize pkt counters per src-grp */ 889 rt->mf6c_pkt_cnt = 0; 890 rt->mf6c_byte_cnt = 0; 891 rt->mf6c_wrong_if = 0; 892 893 if (rt->mf6c_expire) 894 n6expire[hash]--; 895 rt->mf6c_expire = 0; 896 } 897 } 898 if (rt == NULL) { 899 /* no upcall, so make a new entry */ 900 rt = malloc(sizeof(*rt), M_MRTABLE, M_NOWAIT); 901 if (rt == NULL) { 902 splx(s); 903 return ENOBUFS; 904 } 905 906 /* insert new entry at head of hash chain */ 907 rt->mf6c_origin = mfccp->mf6cc_origin; 908 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 909 rt->mf6c_parent = mfccp->mf6cc_parent; 910 rt->mf6c_ifset = mfccp->mf6cc_ifset; 911 /* initialize pkt counters per src-grp */ 912 rt->mf6c_pkt_cnt = 0; 913 rt->mf6c_byte_cnt = 0; 914 rt->mf6c_wrong_if = 0; 915 rt->mf6c_expire = 0; 916 rt->mf6c_stall = NULL; 917 918 /* link into table */ 919 rt->mf6c_next = mf6ctable[hash]; 920 mf6ctable[hash] = rt; 921 } 922 } 923 splx(s); 924 return 0; 925 } 926 927 #ifdef UPCALL_TIMING 928 /* 929 * collect delay statistics on the upcalls 930 */ 931 static void 932 collate(struct timeval *t) 933 { 934 u_long d; 935 struct timeval tp; 936 u_long delta; 937 938 GET_TIME(tp); 939 940 if (TV_LT(*t, tp)) 941 { 942 TV_DELTA(tp, *t, delta); 943 944 d = delta >> 10; 945 if (d > UPCALL_MAX) 946 d = UPCALL_MAX; 947 948 ++upcall_data[d]; 949 } 950 } 951 #endif /* UPCALL_TIMING */ 952 953 /* 954 * Delete an mfc entry 955 */ 956 static int 957 del_m6fc(struct mf6cctl *mfccp) 958 { 959 struct sockaddr_in6 origin; 960 struct sockaddr_in6 mcastgrp; 961 struct mf6c *rt; 962 struct mf6c **nptr; 963 u_long hash; 964 int s; 965 966 origin = mfccp->mf6cc_origin; 967 mcastgrp = mfccp->mf6cc_mcastgrp; 968 hash = MF6CHASH(origin.sin6_addr, mcastgrp.sin6_addr); 969 970 #ifdef MRT6DEBUG 971 if (mrt6debug & DEBUG_MFC) { 972 char ip6bufo[INET6_ADDRSTRLEN], ip6bufm[INET6_ADDRSTRLEN]; 973 log(LOG_DEBUG,"del_m6fc orig %s mcastgrp %s\n", 974 IN6_PRINT(ip6bufo, &origin.sin6_addr), 975 IN6_PRINT(ip6bufm, &mcastgrp.sin6_addr)); 976 } 977 #endif 978 979 s = splsoftnet(); 980 981 nptr = &mf6ctable[hash]; 982 while ((rt = *nptr) != NULL) { 983 if (IN6_ARE_ADDR_EQUAL(&origin.sin6_addr, 984 &rt->mf6c_origin.sin6_addr) && 985 IN6_ARE_ADDR_EQUAL(&mcastgrp.sin6_addr, 986 &rt->mf6c_mcastgrp.sin6_addr) && 987 rt->mf6c_stall == NULL) 988 break; 989 990 nptr = &rt->mf6c_next; 991 } 992 if (rt == NULL) { 993 splx(s); 994 return EADDRNOTAVAIL; 995 } 996 997 *nptr = rt->mf6c_next; 998 free(rt, M_MRTABLE); 999 1000 splx(s); 1001 1002 return 0; 1003 } 1004 1005 static int 1006 socket_send(struct socket *s, struct mbuf *mm, struct sockaddr_in6 *src) 1007 { 1008 if (s) { 1009 if (sbappendaddr(&s->so_rcv, sin6tosa(src), mm, NULL) != 0) { 1010 sorwakeup(s); 1011 return 0; 1012 } 1013 soroverflow(s); 1014 } 1015 m_freem(mm); 1016 return -1; 1017 } 1018 1019 /* 1020 * IPv6 multicast forwarding function. This function assumes that the packet 1021 * pointed to by "ip6" has arrived on (or is about to be sent to) the interface 1022 * pointed to by "ifp", and the packet is to be relayed to other networks 1023 * that have members of the packet's destination IPv6 multicast group. 1024 * 1025 * The packet is returned unscathed to the caller, unless it is 1026 * erroneous, in which case a non-zero return value tells the caller to 1027 * discard it. 1028 */ 1029 int 1030 ip6_mforward(struct ip6_hdr *ip6, struct ifnet *ifp, struct mbuf *m) 1031 { 1032 struct mf6c *rt; 1033 struct mif6 *mifp; 1034 struct mbuf *mm; 1035 int s; 1036 mifi_t mifi; 1037 struct sockaddr_in6 sin6; 1038 char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN]; 1039 1040 #ifdef MRT6DEBUG 1041 if (mrt6debug & DEBUG_FORWARD) 1042 log(LOG_DEBUG, "ip6_mforward: src %s, dst %s, ifindex %d\n", 1043 IN6_PRINT(ip6bufs, &ip6->ip6_src), 1044 IN6_PRINT(ip6bufd, &ip6->ip6_dst), 1045 ifp->if_index); 1046 #endif 1047 1048 /* 1049 * Don't forward a packet with Hop limit of zero or one, 1050 * or a packet destined to a local-only group. 1051 */ 1052 if (ip6->ip6_hlim <= 1 || IN6_IS_ADDR_MC_NODELOCAL(&ip6->ip6_dst) || 1053 IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst)) 1054 return 0; 1055 ip6->ip6_hlim--; 1056 1057 /* 1058 * Source address check: do not forward packets with unspecified 1059 * source. It was discussed in July 2000, on ipngwg mailing list. 1060 * This is rather more serious than unicast cases, because some 1061 * MLD packets can be sent with the unspecified source address 1062 * (although such packets must normally set the hop limit field to 1). 1063 */ 1064 if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) { 1065 IP6_STATINC(IP6_STAT_CANTFORWARD); 1066 if (ip6_log_time + ip6_log_interval < time_uptime) { 1067 ip6_log_time = time_uptime; 1068 log(LOG_DEBUG, 1069 "cannot forward " 1070 "from %s to %s nxt %d received on %s\n", 1071 IN6_PRINT(ip6bufs, &ip6->ip6_src), 1072 IN6_PRINT(ip6bufd, &ip6->ip6_dst), 1073 ip6->ip6_nxt, 1074 m->m_pkthdr.rcvif_index ? 1075 if_name(m_get_rcvif_NOMPSAFE(m)) : "?"); 1076 } 1077 return 0; 1078 } 1079 1080 /* 1081 * Determine forwarding mifs from the forwarding cache table 1082 */ 1083 s = splsoftnet(); 1084 MF6CFIND(ip6->ip6_src, ip6->ip6_dst, rt); 1085 1086 /* Entry exists, so forward if necessary */ 1087 if (rt) { 1088 splx(s); 1089 return ip6_mdq(m, ifp, rt); 1090 } else { 1091 /* 1092 * If we don't have a route for packet's origin, make a copy 1093 * of the packet and send message to routing daemon. 1094 */ 1095 1096 struct mbuf *mb0; 1097 struct rtdetq *rte; 1098 u_long hash; 1099 1100 #ifdef UPCALL_TIMING 1101 struct timeval tp; 1102 GET_TIME(tp); 1103 #endif 1104 1105 mrt6stat.mrt6s_no_route++; 1106 #ifdef MRT6DEBUG 1107 if (mrt6debug & (DEBUG_FORWARD | DEBUG_MFC)) 1108 log(LOG_DEBUG, "ip6_mforward: no rte s %s g %s\n", 1109 IN6_PRINT(ip6bufs, &ip6->ip6_src), 1110 IN6_PRINT(ip6bufd, &ip6->ip6_dst)); 1111 #endif 1112 1113 /* 1114 * Allocate mbufs early so that we don't do extra work if we 1115 * are just going to fail anyway. 1116 */ 1117 rte = malloc(sizeof(*rte), M_MRTABLE, M_NOWAIT); 1118 if (rte == NULL) { 1119 splx(s); 1120 return ENOBUFS; 1121 } 1122 mb0 = m_copypacket(m, M_DONTWAIT); 1123 1124 /* 1125 * Pullup packet header if needed before storing it, 1126 * as other references may modify it in the meantime. 1127 */ 1128 if (mb0 && M_UNWRITABLE(mb0, sizeof(struct ip6_hdr))) 1129 mb0 = m_pullup(mb0, sizeof(struct ip6_hdr)); 1130 if (mb0 == NULL) { 1131 free(rte, M_MRTABLE); 1132 splx(s); 1133 return ENOBUFS; 1134 } 1135 1136 /* is there an upcall waiting for this packet? */ 1137 hash = MF6CHASH(ip6->ip6_src, ip6->ip6_dst); 1138 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 1139 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, 1140 &rt->mf6c_origin.sin6_addr) && 1141 IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, 1142 &rt->mf6c_mcastgrp.sin6_addr) && 1143 (rt->mf6c_stall != NULL)) 1144 break; 1145 } 1146 1147 if (rt == NULL) { 1148 struct mrt6msg *im; 1149 struct omrt6msg *oim; 1150 1151 /* no upcall, so make a new entry */ 1152 rt = malloc(sizeof(*rt), M_MRTABLE, M_NOWAIT); 1153 if (rt == NULL) { 1154 free(rte, M_MRTABLE); 1155 m_freem(mb0); 1156 splx(s); 1157 return ENOBUFS; 1158 } 1159 1160 /* 1161 * Make a copy of the header to send to the user 1162 * level process 1163 */ 1164 mm = m_copym(mb0, 0, sizeof(struct ip6_hdr), M_DONTWAIT); 1165 1166 if (mm == NULL) { 1167 free(rte, M_MRTABLE); 1168 m_freem(mb0); 1169 free(rt, M_MRTABLE); 1170 splx(s); 1171 return ENOBUFS; 1172 } 1173 1174 /* 1175 * Send message to routing daemon 1176 */ 1177 sockaddr_in6_init(&sin6, &ip6->ip6_src, 0, 0, 0); 1178 1179 im = NULL; 1180 oim = NULL; 1181 switch (ip6_mrouter_ver) { 1182 case MRT6_OINIT: 1183 oim = mtod(mm, struct omrt6msg *); 1184 oim->im6_msgtype = MRT6MSG_NOCACHE; 1185 oim->im6_mbz = 0; 1186 break; 1187 case MRT6_INIT: 1188 im = mtod(mm, struct mrt6msg *); 1189 im->im6_msgtype = MRT6MSG_NOCACHE; 1190 im->im6_mbz = 0; 1191 break; 1192 default: 1193 free(rte, M_MRTABLE); 1194 m_freem(mb0); 1195 free(rt, M_MRTABLE); 1196 splx(s); 1197 return EINVAL; 1198 } 1199 1200 #ifdef MRT6DEBUG 1201 if (mrt6debug & DEBUG_FORWARD) 1202 log(LOG_DEBUG, 1203 "getting the iif info in the kernel\n"); 1204 #endif 1205 1206 for (mifp = mif6table, mifi = 0; 1207 mifi < nummifs && mifp->m6_ifp != ifp; 1208 mifp++, mifi++) 1209 ; 1210 1211 switch (ip6_mrouter_ver) { 1212 case MRT6_OINIT: 1213 oim->im6_mif = mifi; 1214 break; 1215 case MRT6_INIT: 1216 im->im6_mif = mifi; 1217 break; 1218 } 1219 1220 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1221 log(LOG_WARNING, "ip6_mforward: ip6_mrouter " 1222 "socket queue full\n"); 1223 mrt6stat.mrt6s_upq_sockfull++; 1224 free(rte, M_MRTABLE); 1225 m_freem(mb0); 1226 free(rt, M_MRTABLE); 1227 splx(s); 1228 return ENOBUFS; 1229 } 1230 1231 mrt6stat.mrt6s_upcalls++; 1232 1233 /* insert new entry at head of hash chain */ 1234 memset(rt, 0, sizeof(*rt)); 1235 sockaddr_in6_init(&rt->mf6c_origin, &ip6->ip6_src, 1236 0, 0, 0); 1237 sockaddr_in6_init(&rt->mf6c_mcastgrp, &ip6->ip6_dst, 1238 0, 0, 0); 1239 rt->mf6c_expire = UPCALL_EXPIRE; 1240 n6expire[hash]++; 1241 rt->mf6c_parent = MF6C_INCOMPLETE_PARENT; 1242 1243 /* link into table */ 1244 rt->mf6c_next = mf6ctable[hash]; 1245 mf6ctable[hash] = rt; 1246 /* Add this entry to the end of the queue */ 1247 rt->mf6c_stall = rte; 1248 } else { 1249 /* determine if q has overflowed */ 1250 struct rtdetq **p; 1251 int npkts = 0; 1252 1253 for (p = &rt->mf6c_stall; *p != NULL; p = &(*p)->next) { 1254 if (++npkts > MAX_UPQ6) { 1255 mrt6stat.mrt6s_upq_ovflw++; 1256 free(rte, M_MRTABLE); 1257 m_freem(mb0); 1258 splx(s); 1259 return 0; 1260 } 1261 } 1262 1263 /* Add this entry to the end of the queue */ 1264 *p = rte; 1265 } 1266 1267 rte->next = NULL; 1268 rte->m = mb0; 1269 rte->ifp = ifp; 1270 #ifdef UPCALL_TIMING 1271 rte->t = tp; 1272 #endif 1273 1274 splx(s); 1275 1276 return 0; 1277 } 1278 } 1279 1280 /* 1281 * Clean up cache entries if upcalls are not serviced 1282 * Call from the Slow Timeout mechanism, every 0.25 seconds. 1283 */ 1284 static void 1285 expire_upcalls(void *unused) 1286 { 1287 struct rtdetq *rte; 1288 struct mf6c *mfc, **nptr; 1289 int i; 1290 1291 /* XXX NOMPSAFE still need softnet_lock */ 1292 mutex_enter(softnet_lock); 1293 KERNEL_LOCK(1, NULL); 1294 1295 for (i = 0; i < MF6CTBLSIZ; i++) { 1296 if (n6expire[i] == 0) 1297 continue; 1298 nptr = &mf6ctable[i]; 1299 while ((mfc = *nptr) != NULL) { 1300 rte = mfc->mf6c_stall; 1301 /* 1302 * Skip real cache entries 1303 * Make sure it wasn't marked to not expire (shouldn't happen) 1304 * If it expires now 1305 */ 1306 if (rte != NULL && 1307 mfc->mf6c_expire != 0 && 1308 --mfc->mf6c_expire == 0) { 1309 #ifdef MRT6DEBUG 1310 if (mrt6debug & DEBUG_EXPIRE) { 1311 char ip6bufo[INET6_ADDRSTRLEN]; 1312 char ip6bufm[INET6_ADDRSTRLEN]; 1313 log(LOG_DEBUG, 1314 "expire_upcalls: expiring (%s %s)\n", 1315 IN6_PRINT(ip6bufo, 1316 &mfc->mf6c_origin.sin6_addr), 1317 IN6_PRINT(ip6bufm, 1318 &mfc->mf6c_mcastgrp.sin6_addr)); 1319 } 1320 #endif 1321 /* 1322 * drop all the packets 1323 * free the mbuf with the pkt, if, timing info 1324 */ 1325 do { 1326 struct rtdetq *n = rte->next; 1327 m_freem(rte->m); 1328 free(rte, M_MRTABLE); 1329 rte = n; 1330 } while (rte != NULL); 1331 mrt6stat.mrt6s_cache_cleanups++; 1332 n6expire[i]--; 1333 1334 *nptr = mfc->mf6c_next; 1335 free(mfc, M_MRTABLE); 1336 } else { 1337 nptr = &mfc->mf6c_next; 1338 } 1339 } 1340 } 1341 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 1342 expire_upcalls, NULL); 1343 1344 KERNEL_UNLOCK_ONE(NULL); 1345 mutex_exit(softnet_lock); 1346 } 1347 1348 /* 1349 * Macro to send packet on mif. Since RSVP packets don't get counted on 1350 * input, they shouldn't get counted on output, so statistics keeping is 1351 * separate. 1352 */ 1353 #define MC6_SEND(ip6, mifp, m) do { \ 1354 if ((mifp)->m6_flags & MIFF_REGISTER) \ 1355 register_send((ip6), (mifp), (m)); \ 1356 else \ 1357 phyint_send((ip6), (mifp), (m)); \ 1358 } while (/*CONSTCOND*/ 0) 1359 1360 /* 1361 * Packet forwarding routine once entry in the cache is made 1362 */ 1363 static int 1364 ip6_mdq(struct mbuf *m, struct ifnet *ifp, struct mf6c *rt) 1365 { 1366 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 1367 mifi_t mifi, iif; 1368 struct mif6 *mifp; 1369 int plen = m->m_pkthdr.len; 1370 struct in6_addr src0, dst0; /* copies for local work */ 1371 u_int32_t iszone, idzone, oszone, odzone; 1372 int error = 0; 1373 1374 /* 1375 * Don't forward if it didn't arrive from the parent mif 1376 * for its origin. 1377 */ 1378 mifi = rt->mf6c_parent; 1379 if ((mifi >= nummifs) || (mif6table[mifi].m6_ifp != ifp)) { 1380 /* came in the wrong interface */ 1381 #ifdef MRT6DEBUG 1382 if (mrt6debug & DEBUG_FORWARD) 1383 log(LOG_DEBUG, 1384 "wrong if: ifid %d mifi %d mififid %x\n", 1385 ifp->if_index, mifi, 1386 mif6table[mifi].m6_ifp ? 1387 mif6table[mifi].m6_ifp->if_index : -1); 1388 #endif 1389 mrt6stat.mrt6s_wrong_if++; 1390 rt->mf6c_wrong_if++; 1391 1392 /* 1393 * If we are doing PIM processing, and we are forwarding 1394 * packets on this interface, send a message to the 1395 * routing daemon. 1396 */ 1397 /* have to make sure this is a valid mif */ 1398 if (mifi < nummifs && mif6table[mifi].m6_ifp) { 1399 if (pim6 && (m->m_flags & M_LOOP) == 0) { 1400 /* 1401 * Check the M_LOOP flag to avoid an 1402 * unnecessary PIM assert. 1403 * XXX: M_LOOP is an ad-hoc hack... 1404 */ 1405 struct sockaddr_in6 sin6; 1406 1407 struct mbuf *mm; 1408 struct mrt6msg *im; 1409 struct omrt6msg *oim; 1410 1411 mm = m_copym(m, 0, sizeof(struct ip6_hdr), M_DONTWAIT); 1412 if (mm && M_UNWRITABLE(mm, sizeof(struct ip6_hdr))) 1413 mm = m_pullup(mm, sizeof(struct ip6_hdr)); 1414 if (mm == NULL) 1415 return ENOBUFS; 1416 1417 oim = NULL; 1418 im = NULL; 1419 switch (ip6_mrouter_ver) { 1420 case MRT6_OINIT: 1421 oim = mtod(mm, struct omrt6msg *); 1422 oim->im6_msgtype = MRT6MSG_WRONGMIF; 1423 oim->im6_mbz = 0; 1424 break; 1425 case MRT6_INIT: 1426 im = mtod(mm, struct mrt6msg *); 1427 im->im6_msgtype = MRT6MSG_WRONGMIF; 1428 im->im6_mbz = 0; 1429 break; 1430 default: 1431 m_freem(mm); 1432 return EINVAL; 1433 } 1434 1435 for (mifp = mif6table, iif = 0; 1436 iif < nummifs && mifp && 1437 mifp->m6_ifp != ifp; 1438 mifp++, iif++) 1439 ; 1440 1441 memset(&sin6, 0, sizeof(sin6)); 1442 sin6.sin6_len = sizeof(sin6); 1443 sin6.sin6_family = AF_INET6; 1444 switch (ip6_mrouter_ver) { 1445 case MRT6_OINIT: 1446 oim->im6_mif = iif; 1447 sin6.sin6_addr = oim->im6_src; 1448 break; 1449 case MRT6_INIT: 1450 im->im6_mif = iif; 1451 sin6.sin6_addr = im->im6_src; 1452 break; 1453 } 1454 1455 mrt6stat.mrt6s_upcalls++; 1456 1457 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1458 #ifdef MRT6DEBUG 1459 if (mrt6debug) 1460 log(LOG_WARNING, "mdq, ip6_mrouter socket queue full\n"); 1461 #endif 1462 ++mrt6stat.mrt6s_upq_sockfull; 1463 return ENOBUFS; 1464 } 1465 } 1466 } 1467 1468 return 0; 1469 } 1470 1471 /* If I sourced this packet, it counts as output, else it was input. */ 1472 if (m->m_pkthdr.rcvif_index == 0) { 1473 /* XXX: is rcvif really NULL when output?? */ 1474 mif6table[mifi].m6_pkt_out++; 1475 mif6table[mifi].m6_bytes_out += plen; 1476 } else { 1477 mif6table[mifi].m6_pkt_in++; 1478 mif6table[mifi].m6_bytes_in += plen; 1479 } 1480 rt->mf6c_pkt_cnt++; 1481 rt->mf6c_byte_cnt += plen; 1482 1483 /* 1484 * For each mif, forward a copy of the packet if there are group 1485 * members downstream on the interface. 1486 */ 1487 src0 = ip6->ip6_src; 1488 dst0 = ip6->ip6_dst; 1489 if ((error = in6_setscope(&src0, ifp, &iszone)) != 0 || 1490 (error = in6_setscope(&dst0, ifp, &idzone)) != 0) { 1491 IP6_STATINC(IP6_STAT_BADSCOPE); 1492 return error; 1493 } 1494 for (mifp = mif6table, mifi = 0; mifi < nummifs; mifp++, mifi++) { 1495 if (IF_ISSET(mifi, &rt->mf6c_ifset)) { 1496 if (mif6table[mifi].m6_ifp == NULL) 1497 continue; 1498 /* 1499 * check if the outgoing packet is going to break 1500 * a scope boundary. 1501 * XXX: For packets through PIM register tunnel 1502 * interface, we believe the routing daemon. 1503 */ 1504 if ((mif6table[rt->mf6c_parent].m6_flags & 1505 MIFF_REGISTER) == 0 && 1506 (mif6table[mifi].m6_flags & MIFF_REGISTER) == 0) { 1507 if (in6_setscope(&src0, mif6table[mifi].m6_ifp, 1508 &oszone) || 1509 in6_setscope(&dst0, mif6table[mifi].m6_ifp, 1510 &odzone) || 1511 iszone != oszone || idzone != odzone) { 1512 IP6_STATINC(IP6_STAT_BADSCOPE); 1513 continue; 1514 } 1515 } 1516 1517 mifp->m6_pkt_out++; 1518 mifp->m6_bytes_out += plen; 1519 MC6_SEND(ip6, mifp, m); 1520 } 1521 } 1522 1523 return 0; 1524 } 1525 1526 static void 1527 phyint_send(struct ip6_hdr *ip6, struct mif6 *mifp, struct mbuf *m) 1528 { 1529 struct mbuf *mb_copy; 1530 struct ifnet *ifp = mifp->m6_ifp; 1531 int error __mrt6debugused = 0; 1532 int s; 1533 static struct route ro; 1534 bool ingroup; 1535 struct sockaddr_in6 dst6; 1536 u_long linkmtu; 1537 1538 s = splsoftnet(); 1539 1540 /* 1541 * Make a new reference to the packet; make sure that 1542 * the IPv6 header is actually copied, not just referenced, 1543 * so that ip6_output() only scribbles on the copy. 1544 */ 1545 mb_copy = m_copypacket(m, M_DONTWAIT); 1546 if (mb_copy && M_UNWRITABLE(mb_copy, sizeof(struct ip6_hdr))) 1547 mb_copy = m_pullup(mb_copy, sizeof(struct ip6_hdr)); 1548 if (mb_copy == NULL) { 1549 splx(s); 1550 return; 1551 } 1552 1553 /* set MCAST flag to the outgoing packet */ 1554 mb_copy->m_flags |= M_MCAST; 1555 1556 /* 1557 * If we sourced the packet, call ip6_output since we may divide 1558 * the packet into fragments when the packet is too big for the 1559 * outgoing interface. 1560 * Otherwise, we can simply send the packet to the interface 1561 * sending queue. 1562 */ 1563 if (m->m_pkthdr.rcvif_index == 0) { 1564 struct ip6_moptions im6o; 1565 1566 im6o.im6o_multicast_if_index = if_get_index(ifp); 1567 /* XXX: ip6_output will override ip6->ip6_hlim */ 1568 im6o.im6o_multicast_hlim = ip6->ip6_hlim; 1569 im6o.im6o_multicast_loop = 1; 1570 error = ip6_output(mb_copy, NULL, &ro, IPV6_FORWARDING, 1571 &im6o, NULL, NULL); 1572 1573 #ifdef MRT6DEBUG 1574 if (mrt6debug & DEBUG_XMIT) 1575 log(LOG_DEBUG, "phyint_send on mif %td err %d\n", 1576 mifp - mif6table, error); 1577 #endif 1578 splx(s); 1579 return; 1580 } 1581 1582 /* 1583 * If we belong to the destination multicast group 1584 * on the outgoing interface, loop back a copy. 1585 */ 1586 /* 1587 * Does not have to check source info, as it's alreay covered by 1588 * ip6_input 1589 */ 1590 sockaddr_in6_init(&dst6, &ip6->ip6_dst, 0, 0, 0); 1591 1592 ingroup = in6_multi_group(&ip6->ip6_dst, ifp); 1593 if (ingroup) { 1594 ip6_mloopback(ifp, m, 1595 satocsin6(rtcache_getdst(&ro))); 1596 } 1597 1598 /* 1599 * Put the packet into the sending queue of the outgoing interface 1600 * if it would fit in the MTU of the interface. 1601 */ 1602 linkmtu = IN6_LINKMTU(ifp); 1603 if (mb_copy->m_pkthdr.len <= linkmtu || linkmtu < IPV6_MMTU) { 1604 error = ip6_if_output(ifp, ifp, mb_copy, &dst6, NULL); 1605 #ifdef MRT6DEBUG 1606 if (mrt6debug & DEBUG_XMIT) 1607 log(LOG_DEBUG, "phyint_send on mif %td err %d\n", 1608 mifp - mif6table, error); 1609 #endif 1610 } else { 1611 /* 1612 * pMTU discovery is intentionally disabled by default, since 1613 * various routers may notify pMTU in multicast, which can be 1614 * a DDoS to a router. 1615 */ 1616 if (ip6_mcast_pmtu) { 1617 icmp6_error(mb_copy, ICMP6_PACKET_TOO_BIG, 0, linkmtu); 1618 } else { 1619 /* simply discard the packet */ 1620 #ifdef MRT6DEBUG 1621 if (mrt6debug & DEBUG_XMIT) { 1622 char ip6bufs[INET6_ADDRSTRLEN]; 1623 char ip6bufd[INET6_ADDRSTRLEN]; 1624 log(LOG_DEBUG, 1625 "phyint_send: packet too big on %s o %s g %s" 1626 " size %d(discarded)\n", 1627 if_name(ifp), 1628 IN6_PRINT(ip6bufs, &ip6->ip6_src), 1629 IN6_PRINT(ip6bufd, &ip6->ip6_dst), 1630 mb_copy->m_pkthdr.len); 1631 } 1632 #endif 1633 m_freem(mb_copy); 1634 } 1635 } 1636 1637 splx(s); 1638 } 1639 1640 static int 1641 register_send(struct ip6_hdr *ip6, struct mif6 *mif, struct mbuf *m) 1642 { 1643 struct mbuf *mm; 1644 int i, len = m->m_pkthdr.len; 1645 struct sockaddr_in6 sin6; 1646 struct mrt6msg *im6; 1647 1648 #ifdef MRT6DEBUG 1649 if (mrt6debug) { 1650 char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN]; 1651 log(LOG_DEBUG, "** IPv6 register_send **\n src %s dst %s\n", 1652 IN6_PRINT(ip6bufs, &ip6->ip6_src), 1653 IN6_PRINT(ip6bufd, &ip6->ip6_dst)); 1654 } 1655 #endif 1656 PIM6_STATINC(PIM6_STAT_SND_REGISTERS); 1657 1658 /* Make a copy of the packet to send to the user level process */ 1659 MGETHDR(mm, M_DONTWAIT, MT_HEADER); 1660 if (mm == NULL) 1661 return ENOBUFS; 1662 mm->m_data += max_linkhdr; 1663 mm->m_len = sizeof(struct ip6_hdr); 1664 1665 if ((mm->m_next = m_copypacket(m, M_DONTWAIT)) == NULL) { 1666 m_freem(mm); 1667 return ENOBUFS; 1668 } 1669 i = MHLEN - M_LEADINGSPACE(mm); 1670 if (i > len) 1671 i = len; 1672 mm = m_pullup(mm, i); 1673 if (mm == NULL) 1674 return ENOBUFS; 1675 mm->m_pkthdr.len = len + sizeof(struct ip6_hdr); 1676 1677 /* 1678 * Send message to routing daemon 1679 */ 1680 sockaddr_in6_init(&sin6, &ip6->ip6_src, 0, 0, 0); 1681 1682 im6 = mtod(mm, struct mrt6msg *); 1683 im6->im6_msgtype = MRT6MSG_WHOLEPKT; 1684 im6->im6_mbz = 0; 1685 im6->im6_mif = mif - mif6table; 1686 1687 /* iif info is not given for reg. encap.n */ 1688 mrt6stat.mrt6s_upcalls++; 1689 1690 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1691 #ifdef MRT6DEBUG 1692 if (mrt6debug) 1693 log(LOG_WARNING, 1694 "register_send: ip6_mrouter socket queue full\n"); 1695 #endif 1696 ++mrt6stat.mrt6s_upq_sockfull; 1697 return ENOBUFS; 1698 } 1699 1700 return 0; 1701 } 1702 1703 /* 1704 * PIM sparse mode hook. Receives the pim control messages, and passes them up 1705 * to the listening socket, using rip6_input. 1706 * 1707 * The only message processed is the REGISTER pim message; the pim header 1708 * is stripped off, and the inner packet is passed to register_mforward. 1709 */ 1710 int 1711 pim6_input(struct mbuf **mp, int *offp, int proto) 1712 { 1713 struct pim *pim; 1714 struct ip6_hdr *ip6 __mrt6debugused; 1715 int pimlen; 1716 struct mbuf *m = *mp; 1717 int minlen; 1718 int off = *offp; 1719 1720 PIM6_STATINC(PIM6_STAT_RCV_TOTAL); 1721 1722 ip6 = mtod(m, struct ip6_hdr *); 1723 pimlen = m->m_pkthdr.len - off; 1724 1725 /* 1726 * Validate lengths 1727 */ 1728 if (pimlen < PIM_MINLEN) { 1729 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1730 #ifdef MRT6DEBUG 1731 if (mrt6debug & DEBUG_PIM) 1732 log(LOG_DEBUG,"pim6_input: PIM packet too short\n"); 1733 #endif 1734 m_freem(m); 1735 return IPPROTO_DONE; 1736 } 1737 1738 /* 1739 * If the packet is at least as big as a REGISTER, go ahead 1740 * and grab the PIM REGISTER header size, to avoid another 1741 * possible m_pullup() later. 1742 * 1743 * PIM_MINLEN == pimhdr + u_int32 == 8 1744 * PIM6_REG_MINLEN == pimhdr + reghdr + eip6hdr == 4 + 4 + 40 1745 */ 1746 minlen = (pimlen >= PIM6_REG_MINLEN) ? PIM6_REG_MINLEN : PIM_MINLEN; 1747 1748 /* 1749 * Make sure that the IP6 and PIM headers in contiguous memory, and 1750 * possibly the PIM REGISTER header 1751 */ 1752 IP6_EXTHDR_GET(pim, struct pim *, m, off, minlen); 1753 if (pim == NULL) { 1754 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1755 return IPPROTO_DONE; 1756 } 1757 1758 /* PIM version check */ 1759 if (pim->pim_ver != PIM_VERSION) { 1760 PIM6_STATINC(PIM6_STAT_RCV_BADVERSION); 1761 #ifdef MRT6DEBUG 1762 log(LOG_ERR, 1763 "pim6_input: incorrect version %d, expecting %d\n", 1764 pim->pim_ver, PIM_VERSION); 1765 #endif 1766 m_freem(m); 1767 return IPPROTO_DONE; 1768 } 1769 1770 #define PIM6_CHECKSUM 1771 #ifdef PIM6_CHECKSUM 1772 { 1773 int cksumlen; 1774 1775 /* 1776 * Validate checksum. 1777 * If PIM REGISTER, exclude the data packet 1778 */ 1779 if (pim->pim_type == PIM_REGISTER) 1780 cksumlen = PIM_MINLEN; 1781 else 1782 cksumlen = pimlen; 1783 1784 if (in6_cksum(m, IPPROTO_PIM, off, cksumlen)) { 1785 PIM6_STATINC(PIM6_STAT_RCV_BADSUM); 1786 #ifdef MRT6DEBUG 1787 if (mrt6debug & DEBUG_PIM) 1788 log(LOG_DEBUG, 1789 "pim6_input: invalid checksum\n"); 1790 #endif 1791 m_freem(m); 1792 return IPPROTO_DONE; 1793 } 1794 } 1795 #endif /* PIM_CHECKSUM */ 1796 1797 if (pim->pim_type == PIM_REGISTER) { 1798 /* 1799 * since this is a REGISTER, we'll make a copy of the register 1800 * headers ip6+pim+u_int32_t+encap_ip6, to be passed up to the 1801 * routing daemon. 1802 */ 1803 static const struct sockaddr_in6 dst = { 1804 .sin6_len = sizeof(dst), 1805 .sin6_family = AF_INET6, 1806 }; 1807 1808 struct mbuf *mcp; 1809 struct ip6_hdr *eip6; 1810 u_int32_t *reghdr; 1811 1812 PIM6_STATINC(PIM6_STAT_RCV_REGISTERS); 1813 1814 if ((reg_mif_num >= nummifs) || (reg_mif_num == (mifi_t) -1)) { 1815 #ifdef MRT6DEBUG 1816 if (mrt6debug & DEBUG_PIM) 1817 log(LOG_DEBUG, 1818 "pim6_input: register mif not set: %d\n", 1819 reg_mif_num); 1820 #endif 1821 m_freem(m); 1822 return IPPROTO_DONE; 1823 } 1824 1825 reghdr = (u_int32_t *)(pim + 1); 1826 1827 if ((ntohl(*reghdr) & PIM_NULL_REGISTER)) 1828 goto pim6_input_to_daemon; 1829 1830 /* 1831 * Validate length 1832 */ 1833 if (pimlen < PIM6_REG_MINLEN) { 1834 #ifdef MRT6DEBUG 1835 char ip6buf[INET6_ADDRSTRLEN]; 1836 log(LOG_ERR, 1837 "pim6_input: register packet size too " 1838 "small %d from %s\n", 1839 pimlen, IN6_PRINT(ip6buf, &ip6->ip6_src)); 1840 #endif 1841 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1842 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1843 m_freem(m); 1844 return IPPROTO_DONE; 1845 } 1846 1847 eip6 = (struct ip6_hdr *)(reghdr + 1); 1848 #ifdef MRT6DEBUG 1849 if (mrt6debug & DEBUG_PIM) { 1850 char ip6bufs[INET6_ADDRSTRLEN]; 1851 char ip6bufd[INET6_ADDRSTRLEN]; 1852 log(LOG_DEBUG, 1853 "pim6_input[register], eip6: %s -> %s, " 1854 "eip6 plen %d\n", 1855 IN6_PRINT(ip6bufs, &eip6->ip6_src), 1856 IN6_PRINT(ip6bufd, &eip6->ip6_dst), 1857 ntohs(eip6->ip6_plen)); 1858 } 1859 #endif 1860 1861 /* verify the version number of the inner packet */ 1862 if ((eip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) { 1863 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1864 #ifdef MRT6DEBUG 1865 log(LOG_DEBUG, "pim6_input: invalid IP version (%d) " 1866 "of the inner packet\n", 1867 (eip6->ip6_vfc & IPV6_VERSION)); 1868 #endif 1869 m_freem(m); 1870 return IPPROTO_DONE; 1871 } 1872 1873 /* verify the inner packet is destined to a mcast group */ 1874 if (!IN6_IS_ADDR_MULTICAST(&eip6->ip6_dst)) { 1875 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1876 #ifdef MRT6DEBUG 1877 if (mrt6debug & DEBUG_PIM) { 1878 char ip6buf[INET6_ADDRSTRLEN]; 1879 log(LOG_DEBUG, 1880 "pim6_input: inner packet of register " 1881 "is not multicast %s\n", 1882 IN6_PRINT(ip6buf, &eip6->ip6_dst)); 1883 } 1884 #endif 1885 m_freem(m); 1886 return IPPROTO_DONE; 1887 } 1888 1889 /* 1890 * make a copy of the whole header to pass to the daemon later. 1891 */ 1892 mcp = m_copym(m, 0, off + PIM6_REG_MINLEN, M_DONTWAIT); 1893 if (mcp == NULL) { 1894 #ifdef MRT6DEBUG 1895 log(LOG_ERR, 1896 "pim6_input: pim register: " 1897 "could not copy register head\n"); 1898 #endif 1899 m_freem(m); 1900 return IPPROTO_DONE; 1901 } 1902 1903 /* 1904 * forward the inner ip6 packet; point m_data at the inner ip6. 1905 */ 1906 m_adj(m, off + PIM_MINLEN); 1907 #ifdef MRT6DEBUG 1908 if (mrt6debug & DEBUG_PIM) { 1909 char ip6bufs[INET6_ADDRSTRLEN]; 1910 char ip6bufd[INET6_ADDRSTRLEN]; 1911 log(LOG_DEBUG, 1912 "pim6_input: forwarding decapsulated register: " 1913 "src %s, dst %s, mif %d\n", 1914 IN6_PRINT(ip6bufs, &eip6->ip6_src), 1915 IN6_PRINT(ip6bufd, &eip6->ip6_dst), 1916 reg_mif_num); 1917 } 1918 #endif 1919 1920 looutput(mif6table[reg_mif_num].m6_ifp, m, sin6tocsa(&dst), 1921 NULL); 1922 1923 /* prepare the register head to send to the mrouting daemon */ 1924 m = mcp; 1925 } 1926 1927 /* 1928 * Pass the PIM message up to the daemon; if it is a register message 1929 * pass the 'head' only up to the daemon. This includes the 1930 * encapsulator ip6 header, pim header, register header and the 1931 * encapsulated ip6 header. 1932 */ 1933 pim6_input_to_daemon: 1934 /* 1935 * Currently, rip6_input() is always called holding softnet_lock 1936 * by ipintr()(!NET_MPSAFE) or PR_INPUT_WRAP()(NET_MPSAFE). 1937 */ 1938 KASSERT(mutex_owned(softnet_lock)); 1939 rip6_input(&m, offp, proto); 1940 return IPPROTO_DONE; 1941 } 1942 1943 static int 1944 sysctl_net_inet6_pim6_stats(SYSCTLFN_ARGS) 1945 { 1946 1947 return (NETSTAT_SYSCTL(pim6stat_percpu, PIM6_NSTATS)); 1948 } 1949 1950 static void 1951 sysctl_net_inet6_pim6_setup(struct sysctllog **clog) 1952 { 1953 1954 sysctl_createv(clog, 0, NULL, NULL, 1955 CTLFLAG_PERMANENT, 1956 CTLTYPE_NODE, "inet6", NULL, 1957 NULL, 0, NULL, 0, 1958 CTL_NET, PF_INET6, CTL_EOL); 1959 sysctl_createv(clog, 0, NULL, NULL, 1960 CTLFLAG_PERMANENT, 1961 CTLTYPE_NODE, "pim6", 1962 SYSCTL_DESCR("PIMv6 settings"), 1963 NULL, 0, NULL, 0, 1964 CTL_NET, PF_INET6, IPPROTO_PIM, CTL_EOL); 1965 1966 sysctl_createv(clog, 0, NULL, NULL, 1967 CTLFLAG_PERMANENT, 1968 CTLTYPE_STRUCT, "stats", 1969 SYSCTL_DESCR("PIMv6 statistics"), 1970 sysctl_net_inet6_pim6_stats, 0, NULL, 0, 1971 CTL_NET, PF_INET6, IPPROTO_PIM, PIM6CTL_STATS, 1972 CTL_EOL); 1973 } 1974
Indexes created Wed Sep 24 02:09:48 GMT 2025