ip6_mroute.c revision 1.121
1 /* $NetBSD: ip6_mroute.c,v 1.121 2018/02/02 09:01:17 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 1.121 2018/02/02 09:01:17 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 #ifdef notyet 554 memset((void *)qtable, 0, sizeof(qtable)); 555 memset((void *)tbftable, 0, sizeof(tbftable)); 556 #endif 557 memset((void *)mif6table, 0, sizeof(mif6table)); 558 nummifs = 0; 559 560 pim6 = 0; /* used to stub out/in pim specific code */ 561 562 callout_stop(&expire_upcalls_ch); 563 564 /* 565 * Free all multicast forwarding cache entries. 566 */ 567 for (i = 0; i < MF6CTBLSIZ; i++) { 568 rt = mf6ctable[i]; 569 while (rt) { 570 struct mf6c *frt; 571 572 for (rte = rt->mf6c_stall; rte != NULL; ) { 573 struct rtdetq *n = rte->next; 574 575 m_freem(rte->m); 576 free(rte, M_MRTABLE); 577 rte = n; 578 } 579 frt = rt; 580 rt = rt->mf6c_next; 581 free(frt, M_MRTABLE); 582 } 583 } 584 585 memset((void *)mf6ctable, 0, sizeof(mf6ctable)); 586 587 /* 588 * Reset register interface 589 */ 590 if (reg_mif_num != (mifi_t)-1) { 591 if_detach(&multicast_register_if6); 592 reg_mif_num = (mifi_t)-1; 593 } 594 595 ip6_mrouter = NULL; 596 ip6_mrouter_ver = 0; 597 598 splx(s); 599 600 #ifdef MRT6DEBUG 601 if (mrt6debug) 602 log(LOG_DEBUG, "ip6_mrouter_done\n"); 603 #endif 604 605 return 0; 606 } 607 608 void 609 ip6_mrouter_detach(struct ifnet *ifp) 610 { 611 struct rtdetq *rte; 612 struct mf6c *mfc; 613 mifi_t mifi; 614 int i; 615 616 if (ip6_mrouter == NULL) 617 return; 618 619 /* 620 * Delete a mif which points to ifp. 621 */ 622 for (mifi = 0; mifi < nummifs; mifi++) 623 if (mif6table[mifi].m6_ifp == ifp) 624 del_m6if(&mifi); 625 626 /* 627 * Clear rte->ifp of cache entries received on ifp. 628 */ 629 for (i = 0; i < MF6CTBLSIZ; i++) { 630 if (n6expire[i] == 0) 631 continue; 632 633 for (mfc = mf6ctable[i]; mfc != NULL; mfc = mfc->mf6c_next) { 634 for (rte = mfc->mf6c_stall; rte != NULL; rte = rte->next) { 635 if (rte->ifp == ifp) 636 rte->ifp = NULL; 637 } 638 } 639 } 640 } 641 642 /* 643 * Add a mif to the mif table 644 */ 645 static int 646 add_m6if(struct mif6ctl *mifcp) 647 { 648 struct mif6 *mifp; 649 struct ifnet *ifp; 650 struct sockaddr_in6 sin6; 651 int error, s; 652 #ifdef notyet 653 struct tbf *m_tbf = tbftable + mifcp->mif6c_mifi; 654 #endif 655 656 if (mifcp->mif6c_mifi >= MAXMIFS) 657 return EINVAL; 658 mifp = mif6table + mifcp->mif6c_mifi; 659 if (mifp->m6_ifp) 660 return EADDRINUSE; /* XXX: is it appropriate? */ 661 if (!mifcp->mif6c_pifi || (ifp = if_byindex(mifcp->mif6c_pifi)) == NULL) 662 return ENXIO; 663 664 if (mifcp->mif6c_flags & MIFF_REGISTER) { 665 ifp = &multicast_register_if6; 666 667 if (reg_mif_num == (mifi_t)-1) { 668 strlcpy(ifp->if_xname, "register_mif", 669 sizeof(ifp->if_xname)); 670 ifp->if_flags |= IFF_LOOPBACK; 671 ifp->if_index = mifcp->mif6c_mifi; 672 reg_mif_num = mifcp->mif6c_mifi; 673 if_attach(ifp); 674 } 675 } else { 676 /* Make sure the interface supports multicast */ 677 if ((ifp->if_flags & IFF_MULTICAST) == 0) 678 return EOPNOTSUPP; 679 680 s = splsoftnet(); 681 /* 682 * Enable promiscuous reception of all IPv6 multicasts 683 * from the interface. 684 */ 685 sin6.sin6_family = AF_INET6; 686 sin6.sin6_addr = in6addr_any; 687 error = if_mcast_op(ifp, SIOCADDMULTI, sin6tosa(&sin6)); 688 splx(s); 689 if (error) 690 return error; 691 } 692 693 s = splsoftnet(); 694 mifp->m6_flags = mifcp->mif6c_flags; 695 mifp->m6_ifp = ifp; 696 #ifdef notyet 697 /* scaling up here allows division by 1024 in critical code */ 698 mifp->m6_rate_limit = mifcp->mif6c_rate_limit * 1024 / 1000; 699 #endif 700 /* initialize per mif pkt counters */ 701 mifp->m6_pkt_in = 0; 702 mifp->m6_pkt_out = 0; 703 mifp->m6_bytes_in = 0; 704 mifp->m6_bytes_out = 0; 705 splx(s); 706 707 /* Adjust nummifs up if the mifi is higher than nummifs */ 708 if (nummifs <= mifcp->mif6c_mifi) 709 nummifs = mifcp->mif6c_mifi + 1; 710 711 #ifdef MRT6DEBUG 712 if (mrt6debug) 713 log(LOG_DEBUG, 714 "add_mif #%d, phyint %s\n", 715 mifcp->mif6c_mifi, ifp->if_xname); 716 #endif 717 718 return 0; 719 } 720 721 /* 722 * Delete a mif from the mif table 723 */ 724 static int 725 del_m6if(mifi_t *mifip) 726 { 727 struct mif6 *mifp = mif6table + *mifip; 728 mifi_t mifi; 729 struct ifnet *ifp; 730 struct sockaddr_in6 sin6; 731 int s; 732 733 if (*mifip >= nummifs) 734 return EINVAL; 735 if (mifp->m6_ifp == NULL) 736 return EINVAL; 737 738 s = splsoftnet(); 739 740 if (!(mifp->m6_flags & MIFF_REGISTER)) { 741 /* 742 * XXX: what if there is yet IPv4 multicast daemon 743 * using the interface? 744 */ 745 ifp = mifp->m6_ifp; 746 747 sin6.sin6_family = AF_INET6; 748 sin6.sin6_addr = in6addr_any; 749 if_mcast_op(ifp, SIOCDELMULTI, sin6tosa(&sin6)); 750 } else { 751 if (reg_mif_num != (mifi_t)-1) { 752 if_detach(&multicast_register_if6); 753 reg_mif_num = (mifi_t)-1; 754 } 755 } 756 757 #ifdef notyet 758 memset((void *)qtable[*mifip], 0, sizeof(qtable[*mifip])); 759 memset((void *)mifp->m6_tbf, 0, sizeof(*(mifp->m6_tbf))); 760 #endif 761 memset((void *)mifp, 0, sizeof (*mifp)); 762 763 /* Adjust nummifs down */ 764 for (mifi = nummifs; mifi > 0; mifi--) 765 if (mif6table[mifi - 1].m6_ifp) 766 break; 767 nummifs = mifi; 768 769 splx(s); 770 771 #ifdef MRT6DEBUG 772 if (mrt6debug) 773 log(LOG_DEBUG, "del_m6if %d, nummifs %d\n", *mifip, nummifs); 774 #endif 775 776 return 0; 777 } 778 779 /* 780 * Add an mfc entry 781 */ 782 static int 783 add_m6fc(struct mf6cctl *mfccp) 784 { 785 struct mf6c *rt; 786 u_long hash; 787 struct rtdetq *rte; 788 u_short nstl; 789 int s; 790 char ip6bufo[INET6_ADDRSTRLEN], ip6bufm[INET6_ADDRSTRLEN]; 791 792 MF6CFIND(mfccp->mf6cc_origin.sin6_addr, 793 mfccp->mf6cc_mcastgrp.sin6_addr, rt); 794 795 /* If an entry already exists, just update the fields */ 796 if (rt) { 797 #ifdef MRT6DEBUG 798 if (mrt6debug & DEBUG_MFC) 799 log(LOG_DEBUG,"add_m6fc update o %s g %s p %x\n", 800 IN6_PRINT(ip6bufo, 801 &mfccp->mf6cc_origin.sin6_addr), 802 IN6_PRINT(ip6bufm, 803 &mfccp->mf6cc_mcastgrp.sin6_addr), 804 mfccp->mf6cc_parent); 805 #endif 806 807 s = splsoftnet(); 808 rt->mf6c_parent = mfccp->mf6cc_parent; 809 rt->mf6c_ifset = mfccp->mf6cc_ifset; 810 splx(s); 811 return 0; 812 } 813 814 /* 815 * Find the entry for which the upcall was made and update 816 */ 817 s = splsoftnet(); 818 hash = MF6CHASH(mfccp->mf6cc_origin.sin6_addr, 819 mfccp->mf6cc_mcastgrp.sin6_addr); 820 for (rt = mf6ctable[hash], nstl = 0; rt; rt = rt->mf6c_next) { 821 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 822 &mfccp->mf6cc_origin.sin6_addr) && 823 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 824 &mfccp->mf6cc_mcastgrp.sin6_addr) && 825 (rt->mf6c_stall != NULL)) { 826 827 if (nstl++) 828 log(LOG_ERR, 829 "add_m6fc: %s o %s g %s p %x dbx %p\n", 830 "multiple kernel entries", 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); 836 837 #ifdef MRT6DEBUG 838 if (mrt6debug & DEBUG_MFC) 839 log(LOG_DEBUG, 840 "add_m6fc o %s g %s p %x dbg %p\n", 841 IN6_PRINT(ip6bufo, 842 &mfccp->mf6cc_origin.sin6_addr), 843 IN6_PRINT(ip6bufm, 844 &mfccp->mf6cc_mcastgrp.sin6_addr), 845 mfccp->mf6cc_parent, rt->mf6c_stall); 846 #endif 847 848 rt->mf6c_origin = mfccp->mf6cc_origin; 849 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 850 rt->mf6c_parent = mfccp->mf6cc_parent; 851 rt->mf6c_ifset = mfccp->mf6cc_ifset; 852 /* initialize pkt counters per src-grp */ 853 rt->mf6c_pkt_cnt = 0; 854 rt->mf6c_byte_cnt = 0; 855 rt->mf6c_wrong_if = 0; 856 857 rt->mf6c_expire = 0; /* Don't clean this guy up */ 858 n6expire[hash]--; 859 860 /* free packets Qed at the end of this entry */ 861 for (rte = rt->mf6c_stall; rte != NULL; ) { 862 struct rtdetq *n = rte->next; 863 if (rte->ifp) { 864 ip6_mdq(rte->m, rte->ifp, rt); 865 } 866 m_freem(rte->m); 867 #ifdef UPCALL_TIMING 868 collate(&(rte->t)); 869 #endif 870 free(rte, M_MRTABLE); 871 rte = n; 872 } 873 rt->mf6c_stall = NULL; 874 } 875 } 876 877 /* 878 * It is possible that an entry is being inserted without an upcall 879 */ 880 if (nstl == 0) { 881 #ifdef MRT6DEBUG 882 if (mrt6debug & DEBUG_MFC) 883 log(LOG_DEBUG, 884 "add_mfc no upcall h %ld o %s g %s p %x\n", 885 hash, 886 IN6_PRINT(ip6bufo, 887 &mfccp->mf6cc_origin.sin6_addr), 888 IN6_PRINT(ip6bufm, 889 &mfccp->mf6cc_mcastgrp.sin6_addr), 890 mfccp->mf6cc_parent); 891 #endif 892 893 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 894 895 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 896 &mfccp->mf6cc_origin.sin6_addr)&& 897 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 898 &mfccp->mf6cc_mcastgrp.sin6_addr)) { 899 900 rt->mf6c_origin = mfccp->mf6cc_origin; 901 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 902 rt->mf6c_parent = mfccp->mf6cc_parent; 903 rt->mf6c_ifset = mfccp->mf6cc_ifset; 904 /* initialize pkt counters per src-grp */ 905 rt->mf6c_pkt_cnt = 0; 906 rt->mf6c_byte_cnt = 0; 907 rt->mf6c_wrong_if = 0; 908 909 if (rt->mf6c_expire) 910 n6expire[hash]--; 911 rt->mf6c_expire = 0; 912 } 913 } 914 if (rt == NULL) { 915 /* no upcall, so make a new entry */ 916 rt = malloc(sizeof(*rt), M_MRTABLE, M_NOWAIT); 917 if (rt == NULL) { 918 splx(s); 919 return ENOBUFS; 920 } 921 922 /* insert new entry at head of hash chain */ 923 rt->mf6c_origin = mfccp->mf6cc_origin; 924 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 925 rt->mf6c_parent = mfccp->mf6cc_parent; 926 rt->mf6c_ifset = mfccp->mf6cc_ifset; 927 /* initialize pkt counters per src-grp */ 928 rt->mf6c_pkt_cnt = 0; 929 rt->mf6c_byte_cnt = 0; 930 rt->mf6c_wrong_if = 0; 931 rt->mf6c_expire = 0; 932 rt->mf6c_stall = NULL; 933 934 /* link into table */ 935 rt->mf6c_next = mf6ctable[hash]; 936 mf6ctable[hash] = rt; 937 } 938 } 939 splx(s); 940 return 0; 941 } 942 943 #ifdef UPCALL_TIMING 944 /* 945 * collect delay statistics on the upcalls 946 */ 947 static void 948 collate(struct timeval *t) 949 { 950 u_long d; 951 struct timeval tp; 952 u_long delta; 953 954 GET_TIME(tp); 955 956 if (TV_LT(*t, tp)) 957 { 958 TV_DELTA(tp, *t, delta); 959 960 d = delta >> 10; 961 if (d > UPCALL_MAX) 962 d = UPCALL_MAX; 963 964 ++upcall_data[d]; 965 } 966 } 967 #endif /* UPCALL_TIMING */ 968 969 /* 970 * Delete an mfc entry 971 */ 972 static int 973 del_m6fc(struct mf6cctl *mfccp) 974 { 975 struct sockaddr_in6 origin; 976 struct sockaddr_in6 mcastgrp; 977 struct mf6c *rt; 978 struct mf6c **nptr; 979 u_long hash; 980 int s; 981 982 origin = mfccp->mf6cc_origin; 983 mcastgrp = mfccp->mf6cc_mcastgrp; 984 hash = MF6CHASH(origin.sin6_addr, mcastgrp.sin6_addr); 985 986 #ifdef MRT6DEBUG 987 if (mrt6debug & DEBUG_MFC) { 988 char ip6bufo[INET6_ADDRSTRLEN], ip6bufm[INET6_ADDRSTRLEN]; 989 log(LOG_DEBUG,"del_m6fc orig %s mcastgrp %s\n", 990 IN6_PRINT(ip6bufo, &origin.sin6_addr), 991 IN6_PRINT(ip6bufm, &mcastgrp.sin6_addr)); 992 } 993 #endif 994 995 s = splsoftnet(); 996 997 nptr = &mf6ctable[hash]; 998 while ((rt = *nptr) != NULL) { 999 if (IN6_ARE_ADDR_EQUAL(&origin.sin6_addr, 1000 &rt->mf6c_origin.sin6_addr) && 1001 IN6_ARE_ADDR_EQUAL(&mcastgrp.sin6_addr, 1002 &rt->mf6c_mcastgrp.sin6_addr) && 1003 rt->mf6c_stall == NULL) 1004 break; 1005 1006 nptr = &rt->mf6c_next; 1007 } 1008 if (rt == NULL) { 1009 splx(s); 1010 return EADDRNOTAVAIL; 1011 } 1012 1013 *nptr = rt->mf6c_next; 1014 free(rt, M_MRTABLE); 1015 1016 splx(s); 1017 1018 return 0; 1019 } 1020 1021 static int 1022 socket_send(struct socket *s, struct mbuf *mm, struct sockaddr_in6 *src) 1023 { 1024 if (s) { 1025 if (sbappendaddr(&s->so_rcv, sin6tosa(src), mm, NULL) != 0) { 1026 sorwakeup(s); 1027 return 0; 1028 } 1029 } 1030 m_freem(mm); 1031 return -1; 1032 } 1033 1034 /* 1035 * IPv6 multicast forwarding function. This function assumes that the packet 1036 * pointed to by "ip6" has arrived on (or is about to be sent to) the interface 1037 * pointed to by "ifp", and the packet is to be relayed to other networks 1038 * that have members of the packet's destination IPv6 multicast group. 1039 * 1040 * The packet is returned unscathed to the caller, unless it is 1041 * erroneous, in which case a non-zero return value tells the caller to 1042 * discard it. 1043 */ 1044 int 1045 ip6_mforward(struct ip6_hdr *ip6, struct ifnet *ifp, struct mbuf *m) 1046 { 1047 struct mf6c *rt; 1048 struct mif6 *mifp; 1049 struct mbuf *mm; 1050 int s; 1051 mifi_t mifi; 1052 struct sockaddr_in6 sin6; 1053 char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN]; 1054 1055 #ifdef MRT6DEBUG 1056 if (mrt6debug & DEBUG_FORWARD) 1057 log(LOG_DEBUG, "ip6_mforward: src %s, dst %s, ifindex %d\n", 1058 IN6_PRINT(ip6bufs, &ip6->ip6_src), 1059 IN6_PRINT(ip6bufd, &ip6->ip6_dst), 1060 ifp->if_index); 1061 #endif 1062 1063 /* 1064 * Don't forward a packet with Hop limit of zero or one, 1065 * or a packet destined to a local-only group. 1066 */ 1067 if (ip6->ip6_hlim <= 1 || IN6_IS_ADDR_MC_NODELOCAL(&ip6->ip6_dst) || 1068 IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst)) 1069 return 0; 1070 ip6->ip6_hlim--; 1071 1072 /* 1073 * Source address check: do not forward packets with unspecified 1074 * source. It was discussed in July 2000, on ipngwg mailing list. 1075 * This is rather more serious than unicast cases, because some 1076 * MLD packets can be sent with the unspecified source address 1077 * (although such packets must normally set the hop limit field to 1). 1078 */ 1079 if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) { 1080 IP6_STATINC(IP6_STAT_CANTFORWARD); 1081 if (ip6_log_time + ip6_log_interval < time_uptime) { 1082 ip6_log_time = time_uptime; 1083 log(LOG_DEBUG, 1084 "cannot forward " 1085 "from %s to %s nxt %d received on %s\n", 1086 IN6_PRINT(ip6bufs, &ip6->ip6_src), 1087 IN6_PRINT(ip6bufd, &ip6->ip6_dst), 1088 ip6->ip6_nxt, 1089 m->m_pkthdr.rcvif_index ? 1090 if_name(m_get_rcvif_NOMPSAFE(m)) : "?"); 1091 } 1092 return 0; 1093 } 1094 1095 /* 1096 * Determine forwarding mifs from the forwarding cache table 1097 */ 1098 s = splsoftnet(); 1099 MF6CFIND(ip6->ip6_src, ip6->ip6_dst, rt); 1100 1101 /* Entry exists, so forward if necessary */ 1102 if (rt) { 1103 splx(s); 1104 return ip6_mdq(m, ifp, rt); 1105 } else { 1106 /* 1107 * If we don't have a route for packet's origin, make a copy 1108 * of the packet and send message to routing daemon. 1109 */ 1110 1111 struct mbuf *mb0; 1112 struct rtdetq *rte; 1113 u_long hash; 1114 1115 #ifdef UPCALL_TIMING 1116 struct timeval tp; 1117 GET_TIME(tp); 1118 #endif 1119 1120 mrt6stat.mrt6s_no_route++; 1121 #ifdef MRT6DEBUG 1122 if (mrt6debug & (DEBUG_FORWARD | DEBUG_MFC)) 1123 log(LOG_DEBUG, "ip6_mforward: no rte s %s g %s\n", 1124 IN6_PRINT(ip6bufs, &ip6->ip6_src), 1125 IN6_PRINT(ip6bufd, &ip6->ip6_dst)); 1126 #endif 1127 1128 /* 1129 * Allocate mbufs early so that we don't do extra work if we 1130 * are just going to fail anyway. 1131 */ 1132 rte = malloc(sizeof(*rte), M_MRTABLE, M_NOWAIT); 1133 if (rte == NULL) { 1134 splx(s); 1135 return ENOBUFS; 1136 } 1137 mb0 = m_copy(m, 0, M_COPYALL); 1138 1139 /* 1140 * Pullup packet header if needed before storing it, 1141 * as other references may modify it in the meantime. 1142 */ 1143 if (mb0 && 1144 (M_READONLY(mb0) || mb0->m_len < sizeof(struct ip6_hdr))) 1145 mb0 = m_pullup(mb0, sizeof(struct ip6_hdr)); 1146 if (mb0 == NULL) { 1147 free(rte, M_MRTABLE); 1148 splx(s); 1149 return ENOBUFS; 1150 } 1151 1152 /* is there an upcall waiting for this packet? */ 1153 hash = MF6CHASH(ip6->ip6_src, ip6->ip6_dst); 1154 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 1155 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, 1156 &rt->mf6c_origin.sin6_addr) && 1157 IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, 1158 &rt->mf6c_mcastgrp.sin6_addr) && 1159 (rt->mf6c_stall != NULL)) 1160 break; 1161 } 1162 1163 if (rt == NULL) { 1164 struct mrt6msg *im; 1165 struct omrt6msg *oim; 1166 1167 /* no upcall, so make a new entry */ 1168 rt = malloc(sizeof(*rt), M_MRTABLE, M_NOWAIT); 1169 if (rt == NULL) { 1170 free(rte, M_MRTABLE); 1171 m_freem(mb0); 1172 splx(s); 1173 return ENOBUFS; 1174 } 1175 1176 /* 1177 * Make a copy of the header to send to the user 1178 * level process 1179 */ 1180 mm = m_copy(mb0, 0, sizeof(struct ip6_hdr)); 1181 1182 if (mm == NULL) { 1183 free(rte, M_MRTABLE); 1184 m_freem(mb0); 1185 free(rt, M_MRTABLE); 1186 splx(s); 1187 return ENOBUFS; 1188 } 1189 1190 /* 1191 * Send message to routing daemon 1192 */ 1193 sockaddr_in6_init(&sin6, &ip6->ip6_src, 0, 0, 0); 1194 1195 im = NULL; 1196 oim = NULL; 1197 switch (ip6_mrouter_ver) { 1198 case MRT6_OINIT: 1199 oim = mtod(mm, struct omrt6msg *); 1200 oim->im6_msgtype = MRT6MSG_NOCACHE; 1201 oim->im6_mbz = 0; 1202 break; 1203 case MRT6_INIT: 1204 im = mtod(mm, struct mrt6msg *); 1205 im->im6_msgtype = MRT6MSG_NOCACHE; 1206 im->im6_mbz = 0; 1207 break; 1208 default: 1209 free(rte, M_MRTABLE); 1210 m_freem(mb0); 1211 free(rt, M_MRTABLE); 1212 splx(s); 1213 return EINVAL; 1214 } 1215 1216 #ifdef MRT6DEBUG 1217 if (mrt6debug & DEBUG_FORWARD) 1218 log(LOG_DEBUG, 1219 "getting the iif info in the kernel\n"); 1220 #endif 1221 1222 for (mifp = mif6table, mifi = 0; 1223 mifi < nummifs && mifp->m6_ifp != ifp; 1224 mifp++, mifi++) 1225 ; 1226 1227 switch (ip6_mrouter_ver) { 1228 case MRT6_OINIT: 1229 oim->im6_mif = mifi; 1230 break; 1231 case MRT6_INIT: 1232 im->im6_mif = mifi; 1233 break; 1234 } 1235 1236 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1237 log(LOG_WARNING, "ip6_mforward: ip6_mrouter " 1238 "socket queue full\n"); 1239 mrt6stat.mrt6s_upq_sockfull++; 1240 free(rte, M_MRTABLE); 1241 m_freem(mb0); 1242 free(rt, M_MRTABLE); 1243 splx(s); 1244 return ENOBUFS; 1245 } 1246 1247 mrt6stat.mrt6s_upcalls++; 1248 1249 /* insert new entry at head of hash chain */ 1250 memset(rt, 0, sizeof(*rt)); 1251 sockaddr_in6_init(&rt->mf6c_origin, &ip6->ip6_src, 1252 0, 0, 0); 1253 sockaddr_in6_init(&rt->mf6c_mcastgrp, &ip6->ip6_dst, 1254 0, 0, 0); 1255 rt->mf6c_expire = UPCALL_EXPIRE; 1256 n6expire[hash]++; 1257 rt->mf6c_parent = MF6C_INCOMPLETE_PARENT; 1258 1259 /* link into table */ 1260 rt->mf6c_next = mf6ctable[hash]; 1261 mf6ctable[hash] = rt; 1262 /* Add this entry to the end of the queue */ 1263 rt->mf6c_stall = rte; 1264 } else { 1265 /* determine if q has overflowed */ 1266 struct rtdetq **p; 1267 int npkts = 0; 1268 1269 for (p = &rt->mf6c_stall; *p != NULL; p = &(*p)->next) { 1270 if (++npkts > MAX_UPQ6) { 1271 mrt6stat.mrt6s_upq_ovflw++; 1272 free(rte, M_MRTABLE); 1273 m_freem(mb0); 1274 splx(s); 1275 return 0; 1276 } 1277 } 1278 1279 /* Add this entry to the end of the queue */ 1280 *p = rte; 1281 } 1282 1283 rte->next = NULL; 1284 rte->m = mb0; 1285 rte->ifp = ifp; 1286 #ifdef UPCALL_TIMING 1287 rte->t = tp; 1288 #endif 1289 1290 splx(s); 1291 1292 return 0; 1293 } 1294 } 1295 1296 /* 1297 * Clean up cache entries if upcalls are not serviced 1298 * Call from the Slow Timeout mechanism, every 0.25 seconds. 1299 */ 1300 static void 1301 expire_upcalls(void *unused) 1302 { 1303 struct rtdetq *rte; 1304 struct mf6c *mfc, **nptr; 1305 int i; 1306 1307 /* XXX NOMPSAFE still need softnet_lock */ 1308 mutex_enter(softnet_lock); 1309 KERNEL_LOCK(1, NULL); 1310 1311 for (i = 0; i < MF6CTBLSIZ; i++) { 1312 if (n6expire[i] == 0) 1313 continue; 1314 nptr = &mf6ctable[i]; 1315 while ((mfc = *nptr) != NULL) { 1316 rte = mfc->mf6c_stall; 1317 /* 1318 * Skip real cache entries 1319 * Make sure it wasn't marked to not expire (shouldn't happen) 1320 * If it expires now 1321 */ 1322 if (rte != NULL && 1323 mfc->mf6c_expire != 0 && 1324 --mfc->mf6c_expire == 0) { 1325 #ifdef MRT6DEBUG 1326 if (mrt6debug & DEBUG_EXPIRE) { 1327 char ip6bufo[INET6_ADDRSTRLEN]; 1328 char ip6bufm[INET6_ADDRSTRLEN]; 1329 log(LOG_DEBUG, 1330 "expire_upcalls: expiring (%s %s)\n", 1331 IN6_PRINT(ip6bufo, 1332 &mfc->mf6c_origin.sin6_addr), 1333 IN6_PRINT(ip6bufm, 1334 &mfc->mf6c_mcastgrp.sin6_addr)); 1335 } 1336 #endif 1337 /* 1338 * drop all the packets 1339 * free the mbuf with the pkt, if, timing info 1340 */ 1341 do { 1342 struct rtdetq *n = rte->next; 1343 m_freem(rte->m); 1344 free(rte, M_MRTABLE); 1345 rte = n; 1346 } while (rte != NULL); 1347 mrt6stat.mrt6s_cache_cleanups++; 1348 n6expire[i]--; 1349 1350 *nptr = mfc->mf6c_next; 1351 free(mfc, M_MRTABLE); 1352 } else { 1353 nptr = &mfc->mf6c_next; 1354 } 1355 } 1356 } 1357 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 1358 expire_upcalls, NULL); 1359 1360 KERNEL_UNLOCK_ONE(NULL); 1361 mutex_exit(softnet_lock); 1362 } 1363 1364 /* 1365 * Macro to send packet on mif. Since RSVP packets don't get counted on 1366 * input, they shouldn't get counted on output, so statistics keeping is 1367 * separate. 1368 */ 1369 #define MC6_SEND(ip6, mifp, m) do { \ 1370 if ((mifp)->m6_flags & MIFF_REGISTER) \ 1371 register_send((ip6), (mifp), (m)); \ 1372 else \ 1373 phyint_send((ip6), (mifp), (m)); \ 1374 } while (/*CONSTCOND*/ 0) 1375 1376 /* 1377 * Packet forwarding routine once entry in the cache is made 1378 */ 1379 static int 1380 ip6_mdq(struct mbuf *m, struct ifnet *ifp, struct mf6c *rt) 1381 { 1382 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 1383 mifi_t mifi, iif; 1384 struct mif6 *mifp; 1385 int plen = m->m_pkthdr.len; 1386 struct in6_addr src0, dst0; /* copies for local work */ 1387 u_int32_t iszone, idzone, oszone, odzone; 1388 int error = 0; 1389 1390 /* 1391 * Don't forward if it didn't arrive from the parent mif 1392 * for its origin. 1393 */ 1394 mifi = rt->mf6c_parent; 1395 if ((mifi >= nummifs) || (mif6table[mifi].m6_ifp != ifp)) { 1396 /* came in the wrong interface */ 1397 #ifdef MRT6DEBUG 1398 if (mrt6debug & DEBUG_FORWARD) 1399 log(LOG_DEBUG, 1400 "wrong if: ifid %d mifi %d mififid %x\n", 1401 ifp->if_index, mifi, 1402 mif6table[mifi].m6_ifp ? 1403 mif6table[mifi].m6_ifp->if_index : -1); 1404 #endif 1405 mrt6stat.mrt6s_wrong_if++; 1406 rt->mf6c_wrong_if++; 1407 1408 /* 1409 * If we are doing PIM processing, and we are forwarding 1410 * packets on this interface, send a message to the 1411 * routing daemon. 1412 */ 1413 /* have to make sure this is a valid mif */ 1414 if (mifi < nummifs && mif6table[mifi].m6_ifp) { 1415 if (pim6 && (m->m_flags & M_LOOP) == 0) { 1416 /* 1417 * Check the M_LOOP flag to avoid an 1418 * unnecessary PIM assert. 1419 * XXX: M_LOOP is an ad-hoc hack... 1420 */ 1421 struct sockaddr_in6 sin6; 1422 1423 struct mbuf *mm; 1424 struct mrt6msg *im; 1425 struct omrt6msg *oim; 1426 1427 mm = m_copy(m, 0, sizeof(struct ip6_hdr)); 1428 if (mm && 1429 (M_READONLY(mm) || 1430 mm->m_len < sizeof(struct ip6_hdr))) 1431 mm = m_pullup(mm, sizeof(struct ip6_hdr)); 1432 if (mm == NULL) 1433 return ENOBUFS; 1434 1435 oim = NULL; 1436 im = NULL; 1437 switch (ip6_mrouter_ver) { 1438 case MRT6_OINIT: 1439 oim = mtod(mm, struct omrt6msg *); 1440 oim->im6_msgtype = MRT6MSG_WRONGMIF; 1441 oim->im6_mbz = 0; 1442 break; 1443 case MRT6_INIT: 1444 im = mtod(mm, struct mrt6msg *); 1445 im->im6_msgtype = MRT6MSG_WRONGMIF; 1446 im->im6_mbz = 0; 1447 break; 1448 default: 1449 m_freem(mm); 1450 return EINVAL; 1451 } 1452 1453 for (mifp = mif6table, iif = 0; 1454 iif < nummifs && mifp && 1455 mifp->m6_ifp != ifp; 1456 mifp++, iif++) 1457 ; 1458 1459 memset(&sin6, 0, sizeof(sin6)); 1460 sin6.sin6_len = sizeof(sin6); 1461 sin6.sin6_family = AF_INET6; 1462 switch (ip6_mrouter_ver) { 1463 case MRT6_OINIT: 1464 oim->im6_mif = iif; 1465 sin6.sin6_addr = oim->im6_src; 1466 break; 1467 case MRT6_INIT: 1468 im->im6_mif = iif; 1469 sin6.sin6_addr = im->im6_src; 1470 break; 1471 } 1472 1473 mrt6stat.mrt6s_upcalls++; 1474 1475 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1476 #ifdef MRT6DEBUG 1477 if (mrt6debug) 1478 log(LOG_WARNING, "mdq, ip6_mrouter socket queue full\n"); 1479 #endif 1480 ++mrt6stat.mrt6s_upq_sockfull; 1481 return ENOBUFS; 1482 } 1483 } 1484 } 1485 1486 return 0; 1487 } 1488 1489 /* If I sourced this packet, it counts as output, else it was input. */ 1490 if (m->m_pkthdr.rcvif_index == 0) { 1491 /* XXX: is rcvif really NULL when output?? */ 1492 mif6table[mifi].m6_pkt_out++; 1493 mif6table[mifi].m6_bytes_out += plen; 1494 } else { 1495 mif6table[mifi].m6_pkt_in++; 1496 mif6table[mifi].m6_bytes_in += plen; 1497 } 1498 rt->mf6c_pkt_cnt++; 1499 rt->mf6c_byte_cnt += plen; 1500 1501 /* 1502 * For each mif, forward a copy of the packet if there are group 1503 * members downstream on the interface. 1504 */ 1505 src0 = ip6->ip6_src; 1506 dst0 = ip6->ip6_dst; 1507 if ((error = in6_setscope(&src0, ifp, &iszone)) != 0 || 1508 (error = in6_setscope(&dst0, ifp, &idzone)) != 0) { 1509 IP6_STATINC(IP6_STAT_BADSCOPE); 1510 return error; 1511 } 1512 for (mifp = mif6table, mifi = 0; mifi < nummifs; mifp++, mifi++) { 1513 if (IF_ISSET(mifi, &rt->mf6c_ifset)) { 1514 if (mif6table[mifi].m6_ifp == NULL) 1515 continue; 1516 /* 1517 * check if the outgoing packet is going to break 1518 * a scope boundary. 1519 * XXX: For packets through PIM register tunnel 1520 * interface, we believe the routing daemon. 1521 */ 1522 if ((mif6table[rt->mf6c_parent].m6_flags & 1523 MIFF_REGISTER) == 0 && 1524 (mif6table[mifi].m6_flags & MIFF_REGISTER) == 0) { 1525 if (in6_setscope(&src0, mif6table[mifi].m6_ifp, 1526 &oszone) || 1527 in6_setscope(&dst0, mif6table[mifi].m6_ifp, 1528 &odzone) || 1529 iszone != oszone || idzone != odzone) { 1530 IP6_STATINC(IP6_STAT_BADSCOPE); 1531 continue; 1532 } 1533 } 1534 1535 mifp->m6_pkt_out++; 1536 mifp->m6_bytes_out += plen; 1537 MC6_SEND(ip6, mifp, m); 1538 } 1539 } 1540 1541 return 0; 1542 } 1543 1544 static void 1545 phyint_send(struct ip6_hdr *ip6, struct mif6 *mifp, struct mbuf *m) 1546 { 1547 struct mbuf *mb_copy; 1548 struct ifnet *ifp = mifp->m6_ifp; 1549 int error __mrt6debugused = 0; 1550 int s; 1551 static struct route ro; 1552 bool ingroup; 1553 struct sockaddr_in6 dst6; 1554 u_long linkmtu; 1555 1556 s = splsoftnet(); 1557 1558 /* 1559 * Make a new reference to the packet; make sure that 1560 * the IPv6 header is actually copied, not just referenced, 1561 * so that ip6_output() only scribbles on the copy. 1562 */ 1563 mb_copy = m_copy(m, 0, M_COPYALL); 1564 if (mb_copy && 1565 (M_READONLY(mb_copy) || mb_copy->m_len < sizeof(struct ip6_hdr))) 1566 mb_copy = m_pullup(mb_copy, sizeof(struct ip6_hdr)); 1567 if (mb_copy == NULL) { 1568 splx(s); 1569 return; 1570 } 1571 1572 /* set MCAST flag to the outgoing packet */ 1573 mb_copy->m_flags |= M_MCAST; 1574 1575 /* 1576 * If we sourced the packet, call ip6_output since we may divide 1577 * the packet into fragments when the packet is too big for the 1578 * outgoing interface. 1579 * Otherwise, we can simply send the packet to the interface 1580 * sending queue. 1581 */ 1582 if (m->m_pkthdr.rcvif_index == 0) { 1583 struct ip6_moptions im6o; 1584 1585 im6o.im6o_multicast_if_index = if_get_index(ifp); 1586 /* XXX: ip6_output will override ip6->ip6_hlim */ 1587 im6o.im6o_multicast_hlim = ip6->ip6_hlim; 1588 im6o.im6o_multicast_loop = 1; 1589 error = ip6_output(mb_copy, NULL, &ro, IPV6_FORWARDING, 1590 &im6o, NULL, NULL); 1591 1592 #ifdef MRT6DEBUG 1593 if (mrt6debug & DEBUG_XMIT) 1594 log(LOG_DEBUG, "phyint_send on mif %td err %d\n", 1595 mifp - mif6table, error); 1596 #endif 1597 splx(s); 1598 return; 1599 } 1600 1601 /* 1602 * If we belong to the destination multicast group 1603 * on the outgoing interface, loop back a copy. 1604 */ 1605 /* 1606 * Does not have to check source info, as it's alreay covered by 1607 * ip6_input 1608 */ 1609 sockaddr_in6_init(&dst6, &ip6->ip6_dst, 0, 0, 0); 1610 1611 ingroup = in6_multi_group(&ip6->ip6_dst, ifp); 1612 if (ingroup) { 1613 ip6_mloopback(ifp, m, 1614 satocsin6(rtcache_getdst(&ro))); 1615 } 1616 1617 /* 1618 * Put the packet into the sending queue of the outgoing interface 1619 * if it would fit in the MTU of the interface. 1620 */ 1621 linkmtu = IN6_LINKMTU(ifp); 1622 if (mb_copy->m_pkthdr.len <= linkmtu || linkmtu < IPV6_MMTU) { 1623 error = ip6_if_output(ifp, ifp, mb_copy, &dst6, NULL); 1624 #ifdef MRT6DEBUG 1625 if (mrt6debug & DEBUG_XMIT) 1626 log(LOG_DEBUG, "phyint_send on mif %td err %d\n", 1627 mifp - mif6table, error); 1628 #endif 1629 } else { 1630 /* 1631 * pMTU discovery is intentionally disabled by default, since 1632 * various routers may notify pMTU in multicast, which can be 1633 * a DDoS to a router. 1634 */ 1635 if (ip6_mcast_pmtu) { 1636 icmp6_error(mb_copy, ICMP6_PACKET_TOO_BIG, 0, linkmtu); 1637 } else { 1638 /* simply discard the packet */ 1639 #ifdef MRT6DEBUG 1640 if (mrt6debug & DEBUG_XMIT) { 1641 char ip6bufs[INET6_ADDRSTRLEN]; 1642 char ip6bufd[INET6_ADDRSTRLEN]; 1643 log(LOG_DEBUG, 1644 "phyint_send: packet too big on %s o %s g %s" 1645 " size %d(discarded)\n", 1646 if_name(ifp), 1647 IN6_PRINT(ip6bufs, &ip6->ip6_src), 1648 IN6_PRINT(ip6bufd, &ip6->ip6_dst), 1649 mb_copy->m_pkthdr.len); 1650 } 1651 #endif 1652 m_freem(mb_copy); 1653 } 1654 } 1655 1656 splx(s); 1657 } 1658 1659 static int 1660 register_send(struct ip6_hdr *ip6, struct mif6 *mif, struct mbuf *m) 1661 { 1662 struct mbuf *mm; 1663 int i, len = m->m_pkthdr.len; 1664 struct sockaddr_in6 sin6; 1665 struct mrt6msg *im6; 1666 1667 #ifdef MRT6DEBUG 1668 if (mrt6debug) { 1669 char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN]; 1670 log(LOG_DEBUG, "** IPv6 register_send **\n src %s dst %s\n", 1671 IN6_PRINT(ip6bufs, &ip6->ip6_src), 1672 IN6_PRINT(ip6bufd, &ip6->ip6_dst)); 1673 } 1674 #endif 1675 PIM6_STATINC(PIM6_STAT_SND_REGISTERS); 1676 1677 /* Make a copy of the packet to send to the user level process */ 1678 MGETHDR(mm, M_DONTWAIT, MT_HEADER); 1679 if (mm == NULL) 1680 return ENOBUFS; 1681 mm->m_data += max_linkhdr; 1682 mm->m_len = sizeof(struct ip6_hdr); 1683 1684 if ((mm->m_next = m_copy(m, 0, M_COPYALL)) == NULL) { 1685 m_freem(mm); 1686 return ENOBUFS; 1687 } 1688 i = MHLEN - M_LEADINGSPACE(mm); 1689 if (i > len) 1690 i = len; 1691 mm = m_pullup(mm, i); 1692 if (mm == NULL) 1693 return ENOBUFS; 1694 mm->m_pkthdr.len = len + sizeof(struct ip6_hdr); 1695 1696 /* 1697 * Send message to routing daemon 1698 */ 1699 sockaddr_in6_init(&sin6, &ip6->ip6_src, 0, 0, 0); 1700 1701 im6 = mtod(mm, struct mrt6msg *); 1702 im6->im6_msgtype = MRT6MSG_WHOLEPKT; 1703 im6->im6_mbz = 0; 1704 im6->im6_mif = mif - mif6table; 1705 1706 /* iif info is not given for reg. encap.n */ 1707 mrt6stat.mrt6s_upcalls++; 1708 1709 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1710 #ifdef MRT6DEBUG 1711 if (mrt6debug) 1712 log(LOG_WARNING, 1713 "register_send: ip6_mrouter socket queue full\n"); 1714 #endif 1715 ++mrt6stat.mrt6s_upq_sockfull; 1716 return ENOBUFS; 1717 } 1718 1719 return 0; 1720 } 1721 1722 /* 1723 * PIM sparse mode hook. Receives the pim control messages, and passes them up 1724 * to the listening socket, using rip6_input. 1725 * 1726 * The only message processed is the REGISTER pim message; the pim header 1727 * is stripped off, and the inner packet is passed to register_mforward. 1728 */ 1729 int 1730 pim6_input(struct mbuf **mp, int *offp, int proto) 1731 { 1732 struct pim *pim; 1733 struct ip6_hdr *ip6 __mrt6debugused; 1734 int pimlen; 1735 struct mbuf *m = *mp; 1736 int minlen; 1737 int off = *offp; 1738 1739 PIM6_STATINC(PIM6_STAT_RCV_TOTAL); 1740 1741 ip6 = mtod(m, struct ip6_hdr *); 1742 pimlen = m->m_pkthdr.len - off; 1743 1744 /* 1745 * Validate lengths 1746 */ 1747 if (pimlen < PIM_MINLEN) { 1748 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1749 #ifdef MRT6DEBUG 1750 if (mrt6debug & DEBUG_PIM) 1751 log(LOG_DEBUG,"pim6_input: PIM packet too short\n"); 1752 #endif 1753 m_freem(m); 1754 return IPPROTO_DONE; 1755 } 1756 1757 /* 1758 * If the packet is at least as big as a REGISTER, go ahead 1759 * and grab the PIM REGISTER header size, to avoid another 1760 * possible m_pullup() later. 1761 * 1762 * PIM_MINLEN == pimhdr + u_int32 == 8 1763 * PIM6_REG_MINLEN == pimhdr + reghdr + eip6hdr == 4 + 4 + 40 1764 */ 1765 minlen = (pimlen >= PIM6_REG_MINLEN) ? PIM6_REG_MINLEN : PIM_MINLEN; 1766 1767 /* 1768 * Make sure that the IP6 and PIM headers in contiguous memory, and 1769 * possibly the PIM REGISTER header 1770 */ 1771 IP6_EXTHDR_GET(pim, struct pim *, m, off, minlen); 1772 if (pim == NULL) { 1773 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1774 return IPPROTO_DONE; 1775 } 1776 1777 /* PIM version check */ 1778 if (pim->pim_ver != PIM_VERSION) { 1779 PIM6_STATINC(PIM6_STAT_RCV_BADVERSION); 1780 #ifdef MRT6DEBUG 1781 log(LOG_ERR, 1782 "pim6_input: incorrect version %d, expecting %d\n", 1783 pim->pim_ver, PIM_VERSION); 1784 #endif 1785 m_freem(m); 1786 return IPPROTO_DONE; 1787 } 1788 1789 #define PIM6_CHECKSUM 1790 #ifdef PIM6_CHECKSUM 1791 { 1792 int cksumlen; 1793 1794 /* 1795 * Validate checksum. 1796 * If PIM REGISTER, exclude the data packet 1797 */ 1798 if (pim->pim_type == PIM_REGISTER) 1799 cksumlen = PIM_MINLEN; 1800 else 1801 cksumlen = pimlen; 1802 1803 if (in6_cksum(m, IPPROTO_PIM, off, cksumlen)) { 1804 PIM6_STATINC(PIM6_STAT_RCV_BADSUM); 1805 #ifdef MRT6DEBUG 1806 if (mrt6debug & DEBUG_PIM) 1807 log(LOG_DEBUG, 1808 "pim6_input: invalid checksum\n"); 1809 #endif 1810 m_freem(m); 1811 return IPPROTO_DONE; 1812 } 1813 } 1814 #endif /* PIM_CHECKSUM */ 1815 1816 if (pim->pim_type == PIM_REGISTER) { 1817 /* 1818 * since this is a REGISTER, we'll make a copy of the register 1819 * headers ip6+pim+u_int32_t+encap_ip6, to be passed up to the 1820 * routing daemon. 1821 */ 1822 static const struct sockaddr_in6 dst = { 1823 .sin6_len = sizeof(dst), 1824 .sin6_family = AF_INET6, 1825 }; 1826 1827 struct mbuf *mcp; 1828 struct ip6_hdr *eip6; 1829 u_int32_t *reghdr; 1830 1831 PIM6_STATINC(PIM6_STAT_RCV_REGISTERS); 1832 1833 if ((reg_mif_num >= nummifs) || (reg_mif_num == (mifi_t) -1)) { 1834 #ifdef MRT6DEBUG 1835 if (mrt6debug & DEBUG_PIM) 1836 log(LOG_DEBUG, 1837 "pim6_input: register mif not set: %d\n", 1838 reg_mif_num); 1839 #endif 1840 m_freem(m); 1841 return IPPROTO_DONE; 1842 } 1843 1844 reghdr = (u_int32_t *)(pim + 1); 1845 1846 if ((ntohl(*reghdr) & PIM_NULL_REGISTER)) 1847 goto pim6_input_to_daemon; 1848 1849 /* 1850 * Validate length 1851 */ 1852 if (pimlen < PIM6_REG_MINLEN) { 1853 #ifdef MRT6DEBUG 1854 char ip6buf[INET6_ADDRSTRLEN]; 1855 log(LOG_ERR, 1856 "pim6_input: register packet size too " 1857 "small %d from %s\n", 1858 pimlen, IN6_PRINT(ip6buf, &ip6->ip6_src)); 1859 #endif 1860 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1861 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1862 m_freem(m); 1863 return IPPROTO_DONE; 1864 } 1865 1866 eip6 = (struct ip6_hdr *)(reghdr + 1); 1867 #ifdef MRT6DEBUG 1868 if (mrt6debug & DEBUG_PIM) { 1869 char ip6bufs[INET6_ADDRSTRLEN]; 1870 char ip6bufd[INET6_ADDRSTRLEN]; 1871 log(LOG_DEBUG, 1872 "pim6_input[register], eip6: %s -> %s, " 1873 "eip6 plen %d\n", 1874 IN6_PRINT(ip6bufs, &eip6->ip6_src), 1875 IN6_PRINT(ip6bufd, &eip6->ip6_dst), 1876 ntohs(eip6->ip6_plen)); 1877 } 1878 #endif 1879 1880 /* verify the version number of the inner packet */ 1881 if ((eip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) { 1882 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1883 #ifdef MRT6DEBUG 1884 log(LOG_DEBUG, "pim6_input: invalid IP version (%d) " 1885 "of the inner packet\n", 1886 (eip6->ip6_vfc & IPV6_VERSION)); 1887 #endif 1888 m_freem(m); 1889 return IPPROTO_DONE; 1890 } 1891 1892 /* verify the inner packet is destined to a mcast group */ 1893 if (!IN6_IS_ADDR_MULTICAST(&eip6->ip6_dst)) { 1894 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1895 #ifdef MRT6DEBUG 1896 if (mrt6debug & DEBUG_PIM) { 1897 char ip6buf[INET6_ADDRSTRLEN]; 1898 log(LOG_DEBUG, 1899 "pim6_input: inner packet of register " 1900 "is not multicast %s\n", 1901 IN6_PRINT(ip6buf, &eip6->ip6_dst)); 1902 } 1903 #endif 1904 m_freem(m); 1905 return IPPROTO_DONE; 1906 } 1907 1908 /* 1909 * make a copy of the whole header to pass to the daemon later. 1910 */ 1911 mcp = m_copy(m, 0, off + PIM6_REG_MINLEN); 1912 if (mcp == NULL) { 1913 #ifdef MRT6DEBUG 1914 log(LOG_ERR, 1915 "pim6_input: pim register: " 1916 "could not copy register head\n"); 1917 #endif 1918 m_freem(m); 1919 return IPPROTO_DONE; 1920 } 1921 1922 /* 1923 * forward the inner ip6 packet; point m_data at the inner ip6. 1924 */ 1925 m_adj(m, off + PIM_MINLEN); 1926 #ifdef MRT6DEBUG 1927 if (mrt6debug & DEBUG_PIM) { 1928 char ip6bufs[INET6_ADDRSTRLEN]; 1929 char ip6bufd[INET6_ADDRSTRLEN]; 1930 log(LOG_DEBUG, 1931 "pim6_input: forwarding decapsulated register: " 1932 "src %s, dst %s, mif %d\n", 1933 IN6_PRINT(ip6bufs, &eip6->ip6_src), 1934 IN6_PRINT(ip6bufd, &eip6->ip6_dst), 1935 reg_mif_num); 1936 } 1937 #endif 1938 1939 looutput(mif6table[reg_mif_num].m6_ifp, m, sin6tocsa(&dst), 1940 NULL); 1941 1942 /* prepare the register head to send to the mrouting daemon */ 1943 m = mcp; 1944 } 1945 1946 /* 1947 * Pass the PIM message up to the daemon; if it is a register message 1948 * pass the 'head' only up to the daemon. This includes the 1949 * encapsulator ip6 header, pim header, register header and the 1950 * encapsulated ip6 header. 1951 */ 1952 pim6_input_to_daemon: 1953 rip6_input(&m, offp, proto); 1954 return IPPROTO_DONE; 1955 } 1956 1957 static int 1958 sysctl_net_inet6_pim6_stats(SYSCTLFN_ARGS) 1959 { 1960 1961 return (NETSTAT_SYSCTL(pim6stat_percpu, PIM6_NSTATS)); 1962 } 1963 1964 static void 1965 sysctl_net_inet6_pim6_setup(struct sysctllog **clog) 1966 { 1967 1968 sysctl_createv(clog, 0, NULL, NULL, 1969 CTLFLAG_PERMANENT, 1970 CTLTYPE_NODE, "inet6", NULL, 1971 NULL, 0, NULL, 0, 1972 CTL_NET, PF_INET6, CTL_EOL); 1973 sysctl_createv(clog, 0, NULL, NULL, 1974 CTLFLAG_PERMANENT, 1975 CTLTYPE_NODE, "pim6", 1976 SYSCTL_DESCR("PIMv6 settings"), 1977 NULL, 0, NULL, 0, 1978 CTL_NET, PF_INET6, IPPROTO_PIM, CTL_EOL); 1979 1980 sysctl_createv(clog, 0, NULL, NULL, 1981 CTLFLAG_PERMANENT, 1982 CTLTYPE_STRUCT, "stats", 1983 SYSCTL_DESCR("PIMv6 statistics"), 1984 sysctl_net_inet6_pim6_stats, 0, NULL, 0, 1985 CTL_NET, PF_INET6, IPPROTO_PIM, PIM6CTL_STATS, 1986 CTL_EOL); 1987 } 1988
Indexes created Mon Sep 29 21:09:56 GMT 2025