ip6_mroute.c revision 1.103
1 /* $NetBSD: ip6_mroute.c,v 1.103 2011/12/31 20:41:59 christos Exp $ */ 2 /* $KAME: ip6_mroute.c,v 1.49 2001/07/25 09:21:18 jinmei Exp $ */ 3 4 /* 5 * Copyright (C) 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* BSDI ip_mroute.c,v 2.10 1996/11/14 00:29:52 jch Exp */ 34 35 /* 36 * Copyright (c) 1992, 1993 37 * The Regents of the University of California. All rights reserved. 38 * 39 * This code is derived from software contributed to Berkeley by 40 * Stephen Deering of Stanford University. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. Neither the name of the University nor the names of its contributors 51 * may be used to endorse or promote products derived from this software 52 * without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 64 * SUCH DAMAGE. 65 * 66 * @(#)ip_mroute.c 8.2 (Berkeley) 11/15/93 67 */ 68 69 /* 70 * Copyright (c) 1989 Stephen Deering 71 * 72 * This code is derived from software contributed to Berkeley by 73 * Stephen Deering of Stanford University. 74 * 75 * Redistribution and use in source and binary forms, with or without 76 * modification, are permitted provided that the following conditions 77 * are met: 78 * 1. Redistributions of source code must retain the above copyright 79 * notice, this list of conditions and the following disclaimer. 80 * 2. Redistributions in binary form must reproduce the above copyright 81 * notice, this list of conditions and the following disclaimer in the 82 * documentation and/or other materials provided with the distribution. 83 * 3. All advertising materials mentioning features or use of this software 84 * must display the following acknowledgement: 85 * This product includes software developed by the University of 86 * California, Berkeley and its contributors. 87 * 4. Neither the name of the University nor the names of its contributors 88 * may be used to endorse or promote products derived from this software 89 * without specific prior written permission. 90 * 91 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 92 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 93 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 94 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 95 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 96 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 97 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 98 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 99 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 100 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 101 * SUCH DAMAGE. 102 * 103 * @(#)ip_mroute.c 8.2 (Berkeley) 11/15/93 104 */ 105 106 /* 107 * IP multicast forwarding procedures 108 * 109 * Written by David Waitzman, BBN Labs, August 1988. 110 * Modified by Steve Deering, Stanford, February 1989. 111 * Modified by Mark J. Steiglitz, Stanford, May, 1991 112 * Modified by Van Jacobson, LBL, January 1993 113 * Modified by Ajit Thyagarajan, PARC, August 1993 114 * Modified by Bill Fenner, PARC, April 1994 115 * 116 * MROUTING Revision: 3.5.1.2 + PIM-SMv2 (pimd) Support 117 */ 118 119 #include <sys/cdefs.h> 120 __KERNEL_RCSID(0, "$NetBSD: ip6_mroute.c,v 1.103 2011/12/31 20:41:59 christos Exp $"); 121 122 #include "opt_inet.h" 123 #include "opt_mrouting.h" 124 125 #include <sys/param.h> 126 #include <sys/systm.h> 127 #include <sys/callout.h> 128 #include <sys/mbuf.h> 129 #include <sys/socket.h> 130 #include <sys/socketvar.h> 131 #include <sys/sockio.h> 132 #include <sys/protosw.h> 133 #include <sys/errno.h> 134 #include <sys/time.h> 135 #include <sys/kernel.h> 136 #include <sys/ioctl.h> 137 #include <sys/sysctl.h> 138 #include <sys/syslog.h> 139 140 #include <net/if.h> 141 #include <net/route.h> 142 #include <net/raw_cb.h> 143 #include <net/net_stats.h> 144 145 #include <netinet/in.h> 146 #include <netinet/in_var.h> 147 #include <netinet/icmp6.h> 148 149 #include <netinet/ip6.h> 150 #include <netinet6/ip6_var.h> 151 #include <netinet6/ip6_private.h> 152 #include <netinet6/ip6_mroute.h> 153 #include <netinet6/scope6_var.h> 154 #include <netinet6/pim6.h> 155 #include <netinet6/pim6_var.h> 156 #include <netinet6/nd6.h> 157 158 #include <net/net_osdep.h> 159 160 static int ip6_mdq(struct mbuf *, struct ifnet *, struct mf6c *); 161 static void phyint_send(struct ip6_hdr *, struct mif6 *, struct mbuf *); 162 163 static int set_pim6(int *); 164 static int socket_send(struct socket *, struct mbuf *, 165 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 #endif 192 193 static void expire_upcalls(void *); 194 #define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */ 195 #define UPCALL_EXPIRE 6 /* number of timeouts */ 196 197 #ifdef INET 198 #ifdef MROUTING 199 extern struct socket *ip_mrouter; 200 #endif 201 #endif 202 203 /* 204 * 'Interfaces' associated with decapsulator (so we can tell 205 * packets that went through it from ones that get reflected 206 * by a broken gateway). These interfaces are never linked into 207 * the system ifnet list & no routes point to them. I.e., packets 208 * can't be sent this way. They only exist as a placeholder for 209 * multicast source verification. 210 */ 211 struct ifnet multicast_register_if6; 212 213 #define ENCAP_HOPS 64 214 215 /* 216 * Private variables. 217 */ 218 static mifi_t nummifs = 0; 219 static mifi_t reg_mif_num = (mifi_t)-1; 220 221 static percpu_t *pim6stat_percpu; 222 223 #define PIM6_STATINC(x) _NET_STATINC(pim6stat_percpu, x) 224 225 static int pim6; 226 227 /* 228 * Hash function for a source, group entry 229 */ 230 #define MF6CHASH(a, g) MF6CHASHMOD((a).s6_addr32[0] ^ (a).s6_addr32[1] ^ \ 231 (a).s6_addr32[2] ^ (a).s6_addr32[3] ^ \ 232 (g).s6_addr32[0] ^ (g).s6_addr32[1] ^ \ 233 (g).s6_addr32[2] ^ (g).s6_addr32[3]) 234 235 /* 236 * Find a route for a given origin IPv6 address and Multicast group address. 237 * Quality of service parameter to be added in the future!!! 238 */ 239 240 #define MF6CFIND(o, g, rt) do { \ 241 struct mf6c *_rt = mf6ctable[MF6CHASH(o,g)]; \ 242 rt = NULL; \ 243 mrt6stat.mrt6s_mfc_lookups++; \ 244 while (_rt) { \ 245 if (IN6_ARE_ADDR_EQUAL(&_rt->mf6c_origin.sin6_addr, &(o)) && \ 246 IN6_ARE_ADDR_EQUAL(&_rt->mf6c_mcastgrp.sin6_addr, &(g)) && \ 247 (_rt->mf6c_stall == NULL)) { \ 248 rt = _rt; \ 249 break; \ 250 } \ 251 _rt = _rt->mf6c_next; \ 252 } \ 253 if (rt == NULL) { \ 254 mrt6stat.mrt6s_mfc_misses++; \ 255 } \ 256 } while (/*CONSTCOND*/ 0) 257 258 /* 259 * Macros to compute elapsed time efficiently 260 * Borrowed from Van Jacobson's scheduling code 261 */ 262 #define TV_DELTA(a, b, delta) do { \ 263 int xxs; \ 264 \ 265 delta = (a).tv_usec - (b).tv_usec; \ 266 if ((xxs = (a).tv_sec - (b).tv_sec)) { \ 267 switch (xxs) { \ 268 case 2: \ 269 delta += 1000000; \ 270 /* FALLTHROUGH */ \ 271 case 1: \ 272 delta += 1000000; \ 273 break; \ 274 default: \ 275 delta += (1000000 * xxs); \ 276 } \ 277 } \ 278 } while (/*CONSTCOND*/ 0) 279 280 #define TV_LT(a, b) (((a).tv_usec < (b).tv_usec && \ 281 (a).tv_sec <= (b).tv_sec) || (a).tv_sec < (b).tv_sec) 282 283 #ifdef UPCALL_TIMING 284 #define UPCALL_MAX 50 285 u_long upcall_data[UPCALL_MAX + 1]; 286 static void collate(); 287 #endif /* UPCALL_TIMING */ 288 289 static int get_sg_cnt(struct sioc_sg_req6 *); 290 static int get_mif6_cnt(struct sioc_mif_req6 *); 291 static int ip6_mrouter_init(struct socket *, int, int); 292 static int add_m6if(struct mif6ctl *); 293 static int del_m6if(mifi_t *); 294 static int add_m6fc(struct mf6cctl *); 295 static int del_m6fc(struct mf6cctl *); 296 static void sysctl_net_inet6_pim6_setup(struct sysctllog **); 297 298 static callout_t expire_upcalls_ch; 299 300 void 301 pim6_init(void) 302 { 303 304 sysctl_net_inet6_pim6_setup(NULL); 305 pim6stat_percpu = percpu_alloc(sizeof(uint64_t) * PIM6_NSTATS); 306 } 307 308 /* 309 * Handle MRT setsockopt commands to modify the multicast routing tables. 310 */ 311 int 312 ip6_mrouter_set(struct socket *so, struct sockopt *sopt) 313 { 314 int error, optval; 315 struct mif6ctl mifc; 316 struct mf6cctl mfcc; 317 mifi_t mifi; 318 319 if (sopt->sopt_name != MRT6_INIT && so != ip6_mrouter) 320 return (EACCES); 321 322 error = 0; 323 324 switch (sopt->sopt_name) { 325 #ifdef MRT6_OINIT 326 case MRT6_OINIT: 327 #endif 328 case MRT6_INIT: 329 error = sockopt_getint(sopt, &optval); 330 if (error) 331 break; 332 return (ip6_mrouter_init(so, optval, sopt->sopt_name)); 333 case MRT6_DONE: 334 return (ip6_mrouter_done()); 335 case MRT6_ADD_MIF: 336 error = sockopt_get(sopt, &mifc, sizeof(mifc)); 337 if (error) 338 break; 339 return (add_m6if(&mifc)); 340 case MRT6_DEL_MIF: 341 error = sockopt_get(sopt, &mifi, sizeof(mifi)); 342 if (error) 343 break; 344 return (del_m6if(&mifi)); 345 case MRT6_ADD_MFC: 346 error = sockopt_get(sopt, &mfcc, sizeof(mfcc)); 347 if (error) 348 break; 349 return (add_m6fc(&mfcc)); 350 case MRT6_DEL_MFC: 351 error = sockopt_get(sopt, &mfcc, sizeof(mfcc)); 352 if (error) 353 break; 354 return (del_m6fc(&mfcc)); 355 case MRT6_PIM: 356 error = sockopt_getint(sopt, &optval); 357 if (error) 358 break; 359 return (set_pim6(&optval)); 360 default: 361 error = EOPNOTSUPP; 362 } 363 364 return (error); 365 } 366 367 /* 368 * Handle MRT getsockopt commands 369 */ 370 int 371 ip6_mrouter_get(struct socket *so, struct sockopt *sopt) 372 { 373 int error; 374 375 if (so != ip6_mrouter) return EACCES; 376 377 error = 0; 378 379 switch (sopt->sopt_name) { 380 case MRT6_PIM: 381 error = sockopt_set(sopt, &pim6, sizeof(pim6)); 382 break; 383 default: 384 error = EOPNOTSUPP; 385 break; 386 } 387 388 return (error); 389 } 390 391 /* 392 * Handle ioctl commands to obtain information from the cache 393 */ 394 int 395 mrt6_ioctl(u_long cmd, void *data) 396 { 397 398 switch (cmd) { 399 case SIOCGETSGCNT_IN6: 400 return (get_sg_cnt((struct sioc_sg_req6 *)data)); 401 case SIOCGETMIFCNT_IN6: 402 return (get_mif6_cnt((struct sioc_mif_req6 *)data)); 403 default: 404 return (EINVAL); 405 } 406 } 407 408 /* 409 * returns the packet, byte, rpf-failure count for the source group provided 410 */ 411 static int 412 get_sg_cnt(struct sioc_sg_req6 *req) 413 { 414 struct mf6c *rt; 415 int s; 416 417 s = splsoftnet(); 418 MF6CFIND(req->src.sin6_addr, req->grp.sin6_addr, rt); 419 splx(s); 420 if (rt != NULL) { 421 req->pktcnt = rt->mf6c_pkt_cnt; 422 req->bytecnt = rt->mf6c_byte_cnt; 423 req->wrong_if = rt->mf6c_wrong_if; 424 } else 425 return (ESRCH); 426 #if 0 427 req->pktcnt = req->bytecnt = req->wrong_if = 0xffffffff; 428 #endif 429 430 return 0; 431 } 432 433 /* 434 * returns the input and output packet and byte counts on the mif provided 435 */ 436 static int 437 get_mif6_cnt(struct sioc_mif_req6 *req) 438 { 439 mifi_t mifi = req->mifi; 440 441 if (mifi >= nummifs) 442 return EINVAL; 443 444 req->icount = mif6table[mifi].m6_pkt_in; 445 req->ocount = mif6table[mifi].m6_pkt_out; 446 req->ibytes = mif6table[mifi].m6_bytes_in; 447 req->obytes = mif6table[mifi].m6_bytes_out; 448 449 return 0; 450 } 451 452 static int 453 set_pim6(int *i) 454 { 455 if ((*i != 1) && (*i != 0)) 456 return EINVAL; 457 458 pim6 = *i; 459 460 return 0; 461 } 462 463 /* 464 * Enable multicast routing 465 */ 466 static int 467 ip6_mrouter_init(struct socket *so, int v, int cmd) 468 { 469 #ifdef MRT6DEBUG 470 if (mrt6debug) 471 log(LOG_DEBUG, 472 "ip6_mrouter_init: so_type = %d, pr_protocol = %d\n", 473 so->so_type, so->so_proto->pr_protocol); 474 #endif 475 476 if (so->so_type != SOCK_RAW || 477 so->so_proto->pr_protocol != IPPROTO_ICMPV6) 478 return (EOPNOTSUPP); 479 480 if (v != 1) 481 return (ENOPROTOOPT); 482 483 if (ip6_mrouter != NULL) 484 return (EADDRINUSE); 485 486 ip6_mrouter = so; 487 ip6_mrouter_ver = cmd; 488 489 memset((void *)mf6ctable, 0, sizeof(mf6ctable)); 490 memset((void *)n6expire, 0, sizeof(n6expire)); 491 492 pim6 = 0;/* used for stubbing out/in pim stuff */ 493 494 callout_init(&expire_upcalls_ch, CALLOUT_MPSAFE); 495 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 496 expire_upcalls, NULL); 497 498 #ifdef MRT6DEBUG 499 if (mrt6debug) 500 log(LOG_DEBUG, "ip6_mrouter_init\n"); 501 #endif 502 503 return 0; 504 } 505 506 /* 507 * Disable multicast routing 508 */ 509 int 510 ip6_mrouter_done(void) 511 { 512 mifi_t mifi; 513 int i; 514 struct ifnet *ifp; 515 struct sockaddr_in6 sin6; 516 struct mf6c *rt; 517 struct rtdetq *rte; 518 int s; 519 520 s = splsoftnet(); 521 522 /* 523 * For each phyint in use, disable promiscuous reception of all IPv6 524 * multicasts. 525 */ 526 #ifdef INET 527 #ifdef MROUTING 528 /* 529 * If there is still IPv4 multicast routing daemon, 530 * we remain interfaces to receive all muliticasted packets. 531 * XXX: there may be an interface in which the IPv4 multicast 532 * daemon is not interested... 533 */ 534 if (!ip_mrouter) 535 #endif 536 #endif 537 { 538 for (mifi = 0; mifi < nummifs; mifi++) { 539 if (mif6table[mifi].m6_ifp && 540 !(mif6table[mifi].m6_flags & MIFF_REGISTER)) { 541 sin6.sin6_family = AF_INET6; 542 sin6.sin6_addr = in6addr_any; 543 ifp = mif6table[mifi].m6_ifp; 544 if_mcast_op(ifp, SIOCDELMULTI, 545 sin6tocsa(&sin6)); 546 } 547 } 548 } 549 #ifdef notyet 550 memset((void *)qtable, 0, sizeof(qtable)); 551 memset((void *)tbftable, 0, sizeof(tbftable)); 552 #endif 553 memset((void *)mif6table, 0, sizeof(mif6table)); 554 nummifs = 0; 555 556 pim6 = 0; /* used to stub out/in pim specific code */ 557 558 callout_stop(&expire_upcalls_ch); 559 560 /* 561 * Free all multicast forwarding cache entries. 562 */ 563 for (i = 0; i < MF6CTBLSIZ; i++) { 564 rt = mf6ctable[i]; 565 while (rt) { 566 struct mf6c *frt; 567 568 for (rte = rt->mf6c_stall; rte != NULL; ) { 569 struct rtdetq *n = rte->next; 570 571 m_freem(rte->m); 572 free(rte, M_MRTABLE); 573 rte = n; 574 } 575 frt = rt; 576 rt = rt->mf6c_next; 577 free(frt, M_MRTABLE); 578 } 579 } 580 581 memset((void *)mf6ctable, 0, sizeof(mf6ctable)); 582 583 /* 584 * Reset register interface 585 */ 586 if (reg_mif_num != (mifi_t)-1) { 587 if_detach(&multicast_register_if6); 588 reg_mif_num = (mifi_t)-1; 589 } 590 591 ip6_mrouter = NULL; 592 ip6_mrouter_ver = 0; 593 594 splx(s); 595 596 #ifdef MRT6DEBUG 597 if (mrt6debug) 598 log(LOG_DEBUG, "ip6_mrouter_done\n"); 599 #endif 600 601 return 0; 602 } 603 604 void 605 ip6_mrouter_detach(struct ifnet *ifp) 606 { 607 struct rtdetq *rte; 608 struct mf6c *mfc; 609 mifi_t mifi; 610 int i; 611 612 if (ip6_mrouter == NULL) 613 return; 614 615 /* 616 * Delete a mif which points to ifp. 617 */ 618 for (mifi = 0; mifi < nummifs; mifi++) 619 if (mif6table[mifi].m6_ifp == ifp) 620 del_m6if(&mifi); 621 622 /* 623 * Clear rte->ifp of cache entries received on ifp. 624 */ 625 for (i = 0; i < MF6CTBLSIZ; i++) { 626 if (n6expire[i] == 0) 627 continue; 628 629 for (mfc = mf6ctable[i]; mfc != NULL; mfc = mfc->mf6c_next) { 630 for (rte = mfc->mf6c_stall; rte != NULL; rte = rte->next) { 631 if (rte->ifp == ifp) 632 rte->ifp = NULL; 633 } 634 } 635 } 636 } 637 638 639 /* 640 * Add a mif to the mif table 641 */ 642 static int 643 add_m6if(struct mif6ctl *mifcp) 644 { 645 struct mif6 *mifp; 646 struct ifnet *ifp; 647 struct sockaddr_in6 sin6; 648 int error, s; 649 #ifdef notyet 650 struct tbf *m_tbf = tbftable + mifcp->mif6c_mifi; 651 #endif 652 653 if (mifcp->mif6c_mifi >= MAXMIFS) 654 return EINVAL; 655 mifp = mif6table + mifcp->mif6c_mifi; 656 if (mifp->m6_ifp) 657 return EADDRINUSE; /* XXX: is it appropriate? */ 658 if (mifcp->mif6c_pifi == 0 || mifcp->mif6c_pifi >= if_indexlim) 659 return ENXIO; 660 /* 661 * XXX: some OSes can remove ifp and clear ifindex2ifnet[id] 662 * even for id between 0 and if_index. 663 */ 664 if ((ifp = ifindex2ifnet[mifcp->mif6c_pifi]) == NULL) 665 return ENXIO; 666 667 if (mifcp->mif6c_flags & MIFF_REGISTER) { 668 ifp = &multicast_register_if6; 669 670 if (reg_mif_num == (mifi_t)-1) { 671 strlcpy(ifp->if_xname, "register_mif", 672 sizeof(ifp->if_xname)); 673 ifp->if_flags |= IFF_LOOPBACK; 674 ifp->if_index = mifcp->mif6c_mifi; 675 reg_mif_num = mifcp->mif6c_mifi; 676 if_attach(ifp); 677 } 678 679 } /* if REGISTER */ 680 else { 681 /* Make sure the interface supports multicast */ 682 if ((ifp->if_flags & IFF_MULTICAST) == 0) 683 return EOPNOTSUPP; 684 685 s = splsoftnet(); 686 /* 687 * Enable promiscuous reception of all IPv6 multicasts 688 * from the interface. 689 */ 690 sin6.sin6_family = AF_INET6; 691 sin6.sin6_addr = in6addr_any; 692 error = if_mcast_op(ifp, SIOCADDMULTI, sin6tosa(&sin6)); 693 splx(s); 694 if (error) 695 return error; 696 } 697 698 s = splsoftnet(); 699 mifp->m6_flags = mifcp->mif6c_flags; 700 mifp->m6_ifp = ifp; 701 #ifdef notyet 702 /* scaling up here allows division by 1024 in critical code */ 703 mifp->m6_rate_limit = mifcp->mif6c_rate_limit * 1024 / 1000; 704 #endif 705 /* initialize per mif pkt counters */ 706 mifp->m6_pkt_in = 0; 707 mifp->m6_pkt_out = 0; 708 mifp->m6_bytes_in = 0; 709 mifp->m6_bytes_out = 0; 710 splx(s); 711 712 /* Adjust nummifs up if the mifi is higher than nummifs */ 713 if (nummifs <= mifcp->mif6c_mifi) 714 nummifs = mifcp->mif6c_mifi + 1; 715 716 #ifdef MRT6DEBUG 717 if (mrt6debug) 718 log(LOG_DEBUG, 719 "add_mif #%d, phyint %s\n", 720 mifcp->mif6c_mifi, ifp->if_xname); 721 #endif 722 723 return 0; 724 } 725 726 /* 727 * Delete a mif from the mif table 728 */ 729 static int 730 del_m6if(mifi_t *mifip) 731 { 732 struct mif6 *mifp = mif6table + *mifip; 733 mifi_t mifi; 734 struct ifnet *ifp; 735 struct sockaddr_in6 sin6; 736 int s; 737 738 if (*mifip >= nummifs) 739 return EINVAL; 740 if (mifp->m6_ifp == NULL) 741 return EINVAL; 742 743 s = splsoftnet(); 744 745 if (!(mifp->m6_flags & MIFF_REGISTER)) { 746 /* 747 * XXX: what if there is yet IPv4 multicast daemon 748 * using the interface? 749 */ 750 ifp = mifp->m6_ifp; 751 752 sin6.sin6_family = AF_INET6; 753 sin6.sin6_addr = in6addr_any; 754 if_mcast_op(ifp, SIOCDELMULTI, sin6tosa(&sin6)); 755 } else { 756 if (reg_mif_num != (mifi_t)-1) { 757 if_detach(&multicast_register_if6); 758 reg_mif_num = (mifi_t)-1; 759 } 760 } 761 762 #ifdef notyet 763 memset((void *)qtable[*mifip], 0, sizeof(qtable[*mifip])); 764 memset((void *)mifp->m6_tbf, 0, sizeof(*(mifp->m6_tbf))); 765 #endif 766 memset((void *)mifp, 0, sizeof (*mifp)); 767 768 /* Adjust nummifs down */ 769 for (mifi = nummifs; mifi > 0; mifi--) 770 if (mif6table[mifi - 1].m6_ifp) 771 break; 772 nummifs = mifi; 773 774 splx(s); 775 776 #ifdef MRT6DEBUG 777 if (mrt6debug) 778 log(LOG_DEBUG, "del_m6if %d, nummifs %d\n", *mifip, nummifs); 779 #endif 780 781 return 0; 782 } 783 784 /* 785 * Add an mfc entry 786 */ 787 static int 788 add_m6fc(struct mf6cctl *mfccp) 789 { 790 struct mf6c *rt; 791 u_long hash; 792 struct rtdetq *rte; 793 u_short nstl; 794 int s; 795 796 MF6CFIND(mfccp->mf6cc_origin.sin6_addr, 797 mfccp->mf6cc_mcastgrp.sin6_addr, rt); 798 799 /* If an entry already exists, just update the fields */ 800 if (rt) { 801 #ifdef MRT6DEBUG 802 if (mrt6debug & DEBUG_MFC) 803 log(LOG_DEBUG,"add_m6fc update o %s g %s p %x\n", 804 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 805 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 806 mfccp->mf6cc_parent); 807 #endif 808 809 s = splsoftnet(); 810 rt->mf6c_parent = mfccp->mf6cc_parent; 811 rt->mf6c_ifset = mfccp->mf6cc_ifset; 812 splx(s); 813 return 0; 814 } 815 816 /* 817 * Find the entry for which the upcall was made and update 818 */ 819 s = splsoftnet(); 820 hash = MF6CHASH(mfccp->mf6cc_origin.sin6_addr, 821 mfccp->mf6cc_mcastgrp.sin6_addr); 822 for (rt = mf6ctable[hash], nstl = 0; rt; rt = rt->mf6c_next) { 823 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 824 &mfccp->mf6cc_origin.sin6_addr) && 825 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 826 &mfccp->mf6cc_mcastgrp.sin6_addr) && 827 (rt->mf6c_stall != NULL)) { 828 829 if (nstl++) 830 log(LOG_ERR, 831 "add_m6fc: %s o %s g %s p %x dbx %p\n", 832 "multiple kernel entries", 833 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 834 ip6_sprintf(&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 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 842 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 843 mfccp->mf6cc_parent, rt->mf6c_stall); 844 #endif 845 846 rt->mf6c_origin = mfccp->mf6cc_origin; 847 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 848 rt->mf6c_parent = mfccp->mf6cc_parent; 849 rt->mf6c_ifset = mfccp->mf6cc_ifset; 850 /* initialize pkt counters per src-grp */ 851 rt->mf6c_pkt_cnt = 0; 852 rt->mf6c_byte_cnt = 0; 853 rt->mf6c_wrong_if = 0; 854 855 rt->mf6c_expire = 0; /* Don't clean this guy up */ 856 n6expire[hash]--; 857 858 /* free packets Qed at the end of this entry */ 859 for (rte = rt->mf6c_stall; rte != NULL; ) { 860 struct rtdetq *n = rte->next; 861 if (rte->ifp) { 862 ip6_mdq(rte->m, rte->ifp, rt); 863 } 864 m_freem(rte->m); 865 #ifdef UPCALL_TIMING 866 collate(&(rte->t)); 867 #endif /* UPCALL_TIMING */ 868 free(rte, M_MRTABLE); 869 rte = n; 870 } 871 rt->mf6c_stall = NULL; 872 } 873 } 874 875 /* 876 * It is possible that an entry is being inserted without an upcall 877 */ 878 if (nstl == 0) { 879 #ifdef MRT6DEBUG 880 if (mrt6debug & DEBUG_MFC) 881 log(LOG_DEBUG, 882 "add_mfc no upcall h %ld o %s g %s p %x\n", 883 hash, 884 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 885 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 886 mfccp->mf6cc_parent); 887 #endif 888 889 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 890 891 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 892 &mfccp->mf6cc_origin.sin6_addr)&& 893 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 894 &mfccp->mf6cc_mcastgrp.sin6_addr)) { 895 896 rt->mf6c_origin = mfccp->mf6cc_origin; 897 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 898 rt->mf6c_parent = mfccp->mf6cc_parent; 899 rt->mf6c_ifset = mfccp->mf6cc_ifset; 900 /* initialize pkt counters per src-grp */ 901 rt->mf6c_pkt_cnt = 0; 902 rt->mf6c_byte_cnt = 0; 903 rt->mf6c_wrong_if = 0; 904 905 if (rt->mf6c_expire) 906 n6expire[hash]--; 907 rt->mf6c_expire = 0; 908 } 909 } 910 if (rt == NULL) { 911 /* no upcall, so make a new entry */ 912 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE, 913 M_NOWAIT); 914 if (rt == NULL) { 915 splx(s); 916 return ENOBUFS; 917 } 918 919 /* insert new entry at head of hash chain */ 920 rt->mf6c_origin = mfccp->mf6cc_origin; 921 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 922 rt->mf6c_parent = mfccp->mf6cc_parent; 923 rt->mf6c_ifset = mfccp->mf6cc_ifset; 924 /* initialize pkt counters per src-grp */ 925 rt->mf6c_pkt_cnt = 0; 926 rt->mf6c_byte_cnt = 0; 927 rt->mf6c_wrong_if = 0; 928 rt->mf6c_expire = 0; 929 rt->mf6c_stall = NULL; 930 931 /* link into table */ 932 rt->mf6c_next = mf6ctable[hash]; 933 mf6ctable[hash] = rt; 934 } 935 } 936 splx(s); 937 return 0; 938 } 939 940 #ifdef UPCALL_TIMING 941 /* 942 * collect delay statistics on the upcalls 943 */ 944 static void 945 collate(struct timeval *t) 946 { 947 u_long d; 948 struct timeval tp; 949 u_long delta; 950 951 GET_TIME(tp); 952 953 if (TV_LT(*t, tp)) 954 { 955 TV_DELTA(tp, *t, delta); 956 957 d = delta >> 10; 958 if (d > UPCALL_MAX) 959 d = UPCALL_MAX; 960 961 ++upcall_data[d]; 962 } 963 } 964 #endif /* UPCALL_TIMING */ 965 966 /* 967 * Delete an mfc entry 968 */ 969 static int 970 del_m6fc(struct mf6cctl *mfccp) 971 { 972 struct sockaddr_in6 origin; 973 struct sockaddr_in6 mcastgrp; 974 struct mf6c *rt; 975 struct mf6c **nptr; 976 u_long hash; 977 int s; 978 979 origin = mfccp->mf6cc_origin; 980 mcastgrp = mfccp->mf6cc_mcastgrp; 981 hash = MF6CHASH(origin.sin6_addr, mcastgrp.sin6_addr); 982 983 #ifdef MRT6DEBUG 984 if (mrt6debug & DEBUG_MFC) 985 log(LOG_DEBUG,"del_m6fc orig %s mcastgrp %s\n", 986 ip6_sprintf(&origin.sin6_addr), 987 ip6_sprintf(&mcastgrp.sin6_addr)); 988 #endif 989 990 s = splsoftnet(); 991 992 nptr = &mf6ctable[hash]; 993 while ((rt = *nptr) != NULL) { 994 if (IN6_ARE_ADDR_EQUAL(&origin.sin6_addr, 995 &rt->mf6c_origin.sin6_addr) && 996 IN6_ARE_ADDR_EQUAL(&mcastgrp.sin6_addr, 997 &rt->mf6c_mcastgrp.sin6_addr) && 998 rt->mf6c_stall == NULL) 999 break; 1000 1001 nptr = &rt->mf6c_next; 1002 } 1003 if (rt == NULL) { 1004 splx(s); 1005 return EADDRNOTAVAIL; 1006 } 1007 1008 *nptr = rt->mf6c_next; 1009 free(rt, M_MRTABLE); 1010 1011 splx(s); 1012 1013 return 0; 1014 } 1015 1016 static int 1017 socket_send(struct socket *s, struct mbuf *mm, struct sockaddr_in6 *src) 1018 { 1019 if (s) { 1020 if (sbappendaddr(&s->so_rcv, 1021 (struct sockaddr *)src, mm, NULL) != 0) { 1022 sorwakeup(s); 1023 return 0; 1024 } 1025 } 1026 m_freem(mm); 1027 return -1; 1028 } 1029 1030 /* 1031 * IPv6 multicast forwarding function. This function assumes that the packet 1032 * pointed to by "ip6" has arrived on (or is about to be sent to) the interface 1033 * pointed to by "ifp", and the packet is to be relayed to other networks 1034 * that have members of the packet's destination IPv6 multicast group. 1035 * 1036 * The packet is returned unscathed to the caller, unless it is 1037 * erroneous, in which case a non-zero return value tells the caller to 1038 * discard it. 1039 */ 1040 1041 int 1042 ip6_mforward(struct ip6_hdr *ip6, struct ifnet *ifp, struct mbuf *m) 1043 { 1044 struct mf6c *rt; 1045 struct mif6 *mifp; 1046 struct mbuf *mm; 1047 int s; 1048 mifi_t mifi; 1049 struct sockaddr_in6 sin6; 1050 1051 #ifdef MRT6DEBUG 1052 if (mrt6debug & DEBUG_FORWARD) 1053 log(LOG_DEBUG, "ip6_mforward: src %s, dst %s, ifindex %d\n", 1054 ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst), 1055 ifp->if_index); 1056 #endif 1057 1058 /* 1059 * Don't forward a packet with Hop limit of zero or one, 1060 * or a packet destined to a local-only group. 1061 */ 1062 if (ip6->ip6_hlim <= 1 || IN6_IS_ADDR_MC_NODELOCAL(&ip6->ip6_dst) || 1063 IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst)) 1064 return 0; 1065 ip6->ip6_hlim--; 1066 1067 /* 1068 * Source address check: do not forward packets with unspecified 1069 * source. It was discussed in July 2000, on ipngwg mailing list. 1070 * This is rather more serious than unicast cases, because some 1071 * MLD packets can be sent with the unspecified source address 1072 * (although such packets must normally set the hop limit field to 1). 1073 */ 1074 if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) { 1075 IP6_STATINC(IP6_STAT_CANTFORWARD); 1076 if (ip6_log_time + ip6_log_interval < time_second) { 1077 ip6_log_time = time_second; 1078 log(LOG_DEBUG, 1079 "cannot forward " 1080 "from %s to %s nxt %d received on %s\n", 1081 ip6_sprintf(&ip6->ip6_src), 1082 ip6_sprintf(&ip6->ip6_dst), 1083 ip6->ip6_nxt, 1084 m->m_pkthdr.rcvif ? 1085 if_name(m->m_pkthdr.rcvif) : "?"); 1086 } 1087 return 0; 1088 } 1089 1090 /* 1091 * Determine forwarding mifs from the forwarding cache table 1092 */ 1093 s = splsoftnet(); 1094 MF6CFIND(ip6->ip6_src, ip6->ip6_dst, rt); 1095 1096 /* Entry exists, so forward if necessary */ 1097 if (rt) { 1098 splx(s); 1099 return (ip6_mdq(m, ifp, rt)); 1100 } else { 1101 /* 1102 * If we don't have a route for packet's origin, 1103 * Make a copy of the packet & 1104 * send message to routing daemon 1105 */ 1106 1107 struct mbuf *mb0; 1108 struct rtdetq *rte; 1109 u_long hash; 1110 /* int i, npkts;*/ 1111 #ifdef UPCALL_TIMING 1112 struct timeval tp; 1113 1114 GET_TIME(tp); 1115 #endif /* UPCALL_TIMING */ 1116 1117 mrt6stat.mrt6s_no_route++; 1118 #ifdef MRT6DEBUG 1119 if (mrt6debug & (DEBUG_FORWARD | DEBUG_MFC)) 1120 log(LOG_DEBUG, "ip6_mforward: no rte s %s g %s\n", 1121 ip6_sprintf(&ip6->ip6_src), 1122 ip6_sprintf(&ip6->ip6_dst)); 1123 #endif 1124 1125 /* 1126 * Allocate mbufs early so that we don't do extra work if we 1127 * are just going to fail anyway. 1128 */ 1129 rte = (struct rtdetq *)malloc(sizeof(*rte), M_MRTABLE, 1130 M_NOWAIT); 1131 if (rte == NULL) { 1132 splx(s); 1133 return ENOBUFS; 1134 } 1135 mb0 = m_copy(m, 0, M_COPYALL); 1136 /* 1137 * Pullup packet header if needed before storing it, 1138 * as other references may modify it in the meantime. 1139 */ 1140 if (mb0 && 1141 (M_READONLY(mb0) || mb0->m_len < sizeof(struct ip6_hdr))) 1142 mb0 = m_pullup(mb0, sizeof(struct ip6_hdr)); 1143 if (mb0 == NULL) { 1144 free(rte, M_MRTABLE); 1145 splx(s); 1146 return ENOBUFS; 1147 } 1148 1149 /* is there an upcall waiting for this packet? */ 1150 hash = MF6CHASH(ip6->ip6_src, ip6->ip6_dst); 1151 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 1152 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, 1153 &rt->mf6c_origin.sin6_addr) && 1154 IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, 1155 &rt->mf6c_mcastgrp.sin6_addr) && 1156 (rt->mf6c_stall != NULL)) 1157 break; 1158 } 1159 1160 if (rt == NULL) { 1161 struct mrt6msg *im; 1162 struct omrt6msg *oim; 1163 1164 /* no upcall, so make a new entry */ 1165 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE, 1166 M_NOWAIT); 1167 if (rt == NULL) { 1168 free(rte, M_MRTABLE); 1169 m_freem(mb0); 1170 splx(s); 1171 return ENOBUFS; 1172 } 1173 /* 1174 * Make a copy of the header to send to the user 1175 * level process 1176 */ 1177 mm = m_copy(mb0, 0, sizeof(struct ip6_hdr)); 1178 1179 if (mm == NULL) { 1180 free(rte, M_MRTABLE); 1181 m_freem(mb0); 1182 free(rt, M_MRTABLE); 1183 splx(s); 1184 return ENOBUFS; 1185 } 1186 1187 /* 1188 * Send message to routing daemon 1189 */ 1190 sockaddr_in6_init(&sin6, &ip6->ip6_src, 0, 0, 0); 1191 1192 im = NULL; 1193 oim = NULL; 1194 switch (ip6_mrouter_ver) { 1195 case MRT6_OINIT: 1196 oim = mtod(mm, struct omrt6msg *); 1197 oim->im6_msgtype = MRT6MSG_NOCACHE; 1198 oim->im6_mbz = 0; 1199 break; 1200 case MRT6_INIT: 1201 im = mtod(mm, struct mrt6msg *); 1202 im->im6_msgtype = MRT6MSG_NOCACHE; 1203 im->im6_mbz = 0; 1204 break; 1205 default: 1206 free(rte, M_MRTABLE); 1207 m_freem(mb0); 1208 free(rt, M_MRTABLE); 1209 splx(s); 1210 return EINVAL; 1211 } 1212 1213 #ifdef MRT6DEBUG 1214 if (mrt6debug & DEBUG_FORWARD) 1215 log(LOG_DEBUG, 1216 "getting the iif info in the kernel\n"); 1217 #endif 1218 1219 for (mifp = mif6table, mifi = 0; 1220 mifi < nummifs && mifp->m6_ifp != ifp; 1221 mifp++, mifi++) 1222 ; 1223 1224 switch (ip6_mrouter_ver) { 1225 case MRT6_OINIT: 1226 oim->im6_mif = mifi; 1227 break; 1228 case MRT6_INIT: 1229 im->im6_mif = mifi; 1230 break; 1231 } 1232 1233 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1234 log(LOG_WARNING, "ip6_mforward: ip6_mrouter " 1235 "socket queue full\n"); 1236 mrt6stat.mrt6s_upq_sockfull++; 1237 free(rte, M_MRTABLE); 1238 m_freem(mb0); 1239 free(rt, M_MRTABLE); 1240 splx(s); 1241 return ENOBUFS; 1242 } 1243 1244 mrt6stat.mrt6s_upcalls++; 1245 1246 /* insert new entry at head of hash chain */ 1247 memset(rt, 0, sizeof(*rt)); 1248 sockaddr_in6_init(&rt->mf6c_origin, &ip6->ip6_src, 1249 0, 0, 0); 1250 sockaddr_in6_init(&rt->mf6c_mcastgrp, &ip6->ip6_dst, 1251 0, 0, 0); 1252 rt->mf6c_expire = UPCALL_EXPIRE; 1253 n6expire[hash]++; 1254 rt->mf6c_parent = MF6C_INCOMPLETE_PARENT; 1255 1256 /* link into table */ 1257 rt->mf6c_next = mf6ctable[hash]; 1258 mf6ctable[hash] = rt; 1259 /* Add this entry to the end of the queue */ 1260 rt->mf6c_stall = rte; 1261 } else { 1262 /* determine if q has overflowed */ 1263 struct rtdetq **p; 1264 int npkts = 0; 1265 1266 for (p = &rt->mf6c_stall; *p != NULL; p = &(*p)->next) 1267 if (++npkts > MAX_UPQ6) { 1268 mrt6stat.mrt6s_upq_ovflw++; 1269 free(rte, M_MRTABLE); 1270 m_freem(mb0); 1271 splx(s); 1272 return 0; 1273 } 1274 1275 /* Add this entry to the end of the queue */ 1276 *p = rte; 1277 } 1278 1279 rte->next = NULL; 1280 rte->m = mb0; 1281 rte->ifp = ifp; 1282 #ifdef UPCALL_TIMING 1283 rte->t = tp; 1284 #endif /* UPCALL_TIMING */ 1285 1286 splx(s); 1287 1288 return 0; 1289 } 1290 } 1291 1292 /* 1293 * Clean up cache entries if upcalls are not serviced 1294 * Call from the Slow Timeout mechanism, every 0.25 seconds. 1295 */ 1296 static void 1297 expire_upcalls(void *unused) 1298 { 1299 struct rtdetq *rte; 1300 struct mf6c *mfc, **nptr; 1301 int i; 1302 1303 mutex_enter(softnet_lock); 1304 KERNEL_LOCK(1, NULL); 1305 1306 for (i = 0; i < MF6CTBLSIZ; i++) { 1307 if (n6expire[i] == 0) 1308 continue; 1309 nptr = &mf6ctable[i]; 1310 while ((mfc = *nptr) != NULL) { 1311 rte = mfc->mf6c_stall; 1312 /* 1313 * Skip real cache entries 1314 * Make sure it wasn't marked to not expire (shouldn't happen) 1315 * If it expires now 1316 */ 1317 if (rte != NULL && 1318 mfc->mf6c_expire != 0 && 1319 --mfc->mf6c_expire == 0) { 1320 #ifdef MRT6DEBUG 1321 if (mrt6debug & DEBUG_EXPIRE) 1322 log(LOG_DEBUG, "expire_upcalls: expiring (%s %s)\n", 1323 ip6_sprintf(&mfc->mf6c_origin.sin6_addr), 1324 ip6_sprintf(&mfc->mf6c_mcastgrp.sin6_addr)); 1325 #endif 1326 /* 1327 * drop all the packets 1328 * free the mbuf with the pkt, if, timing info 1329 */ 1330 do { 1331 struct rtdetq *n = rte->next; 1332 m_freem(rte->m); 1333 free(rte, M_MRTABLE); 1334 rte = n; 1335 } while (rte != NULL); 1336 mrt6stat.mrt6s_cache_cleanups++; 1337 n6expire[i]--; 1338 1339 *nptr = mfc->mf6c_next; 1340 free(mfc, M_MRTABLE); 1341 } else { 1342 nptr = &mfc->mf6c_next; 1343 } 1344 } 1345 } 1346 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 1347 expire_upcalls, NULL); 1348 1349 KERNEL_UNLOCK_ONE(NULL); 1350 mutex_exit(softnet_lock); 1351 } 1352 1353 /* 1354 * Packet forwarding routine once entry in the cache is made 1355 */ 1356 static int 1357 ip6_mdq(struct mbuf *m, struct ifnet *ifp, struct mf6c *rt) 1358 { 1359 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 1360 mifi_t mifi, iif; 1361 struct mif6 *mifp; 1362 int plen = m->m_pkthdr.len; 1363 struct in6_addr src0, dst0; /* copies for local work */ 1364 u_int32_t iszone, idzone, oszone, odzone; 1365 int error = 0; 1366 1367 /* 1368 * Macro to send packet on mif. Since RSVP packets don't get counted on 1369 * input, they shouldn't get counted on output, so statistics keeping is 1370 * separate. 1371 */ 1372 1373 #define MC6_SEND(ip6, mifp, m) do { \ 1374 if ((mifp)->m6_flags & MIFF_REGISTER) \ 1375 register_send((ip6), (mifp), (m)); \ 1376 else \ 1377 phyint_send((ip6), (mifp), (m)); \ 1378 } while (/*CONSTCOND*/ 0) 1379 1380 /* 1381 * Don't forward if it didn't arrive from the parent mif 1382 * for its origin. 1383 */ 1384 mifi = rt->mf6c_parent; 1385 if ((mifi >= nummifs) || (mif6table[mifi].m6_ifp != ifp)) { 1386 /* came in the wrong interface */ 1387 #ifdef MRT6DEBUG 1388 if (mrt6debug & DEBUG_FORWARD) 1389 log(LOG_DEBUG, 1390 "wrong if: ifid %d mifi %d mififid %x\n", 1391 ifp->if_index, mifi, 1392 mif6table[mifi].m6_ifp ? 1393 mif6table[mifi].m6_ifp->if_index : -1); 1394 #endif 1395 mrt6stat.mrt6s_wrong_if++; 1396 rt->mf6c_wrong_if++; 1397 /* 1398 * If we are doing PIM processing, and we are forwarding 1399 * packets on this interface, send a message to the 1400 * routing daemon. 1401 */ 1402 /* have to make sure this is a valid mif */ 1403 if (mifi < nummifs && mif6table[mifi].m6_ifp) 1404 if (pim6 && (m->m_flags & M_LOOP) == 0) { 1405 /* 1406 * Check the M_LOOP flag to avoid an 1407 * unnecessary PIM assert. 1408 * XXX: M_LOOP is an ad-hoc hack... 1409 */ 1410 struct sockaddr_in6 sin6; 1411 1412 struct mbuf *mm; 1413 struct mrt6msg *im; 1414 struct omrt6msg *oim; 1415 1416 mm = m_copy(m, 0, sizeof(struct ip6_hdr)); 1417 if (mm && 1418 (M_READONLY(mm) || 1419 mm->m_len < sizeof(struct ip6_hdr))) 1420 mm = m_pullup(mm, sizeof(struct ip6_hdr)); 1421 if (mm == NULL) 1422 return ENOBUFS; 1423 1424 oim = NULL; 1425 im = NULL; 1426 switch (ip6_mrouter_ver) { 1427 case MRT6_OINIT: 1428 oim = mtod(mm, struct omrt6msg *); 1429 oim->im6_msgtype = MRT6MSG_WRONGMIF; 1430 oim->im6_mbz = 0; 1431 break; 1432 case MRT6_INIT: 1433 im = mtod(mm, struct mrt6msg *); 1434 im->im6_msgtype = MRT6MSG_WRONGMIF; 1435 im->im6_mbz = 0; 1436 break; 1437 default: 1438 m_freem(mm); 1439 return EINVAL; 1440 } 1441 1442 for (mifp = mif6table, iif = 0; 1443 iif < nummifs && mifp && 1444 mifp->m6_ifp != ifp; 1445 mifp++, iif++) 1446 ; 1447 1448 memset(&sin6, 0, sizeof(sin6)); 1449 sin6.sin6_len = sizeof(sin6); 1450 sin6.sin6_family = AF_INET6; 1451 switch (ip6_mrouter_ver) { 1452 case MRT6_OINIT: 1453 oim->im6_mif = iif; 1454 sin6.sin6_addr = oim->im6_src; 1455 break; 1456 case MRT6_INIT: 1457 im->im6_mif = iif; 1458 sin6.sin6_addr = im->im6_src; 1459 break; 1460 } 1461 1462 mrt6stat.mrt6s_upcalls++; 1463 1464 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1465 #ifdef MRT6DEBUG 1466 if (mrt6debug) 1467 log(LOG_WARNING, "mdq, ip6_mrouter socket queue full\n"); 1468 #endif 1469 ++mrt6stat.mrt6s_upq_sockfull; 1470 return ENOBUFS; 1471 } /* if socket Q full */ 1472 } /* if PIM */ 1473 return 0; 1474 } /* if wrong iif */ 1475 1476 /* If I sourced this packet, it counts as output, else it was input. */ 1477 if (m->m_pkthdr.rcvif == NULL) { 1478 /* XXX: is rcvif really NULL when output?? */ 1479 mif6table[mifi].m6_pkt_out++; 1480 mif6table[mifi].m6_bytes_out += plen; 1481 } else { 1482 mif6table[mifi].m6_pkt_in++; 1483 mif6table[mifi].m6_bytes_in += plen; 1484 } 1485 rt->mf6c_pkt_cnt++; 1486 rt->mf6c_byte_cnt += plen; 1487 1488 /* 1489 * For each mif, forward a copy of the packet if there are group 1490 * members downstream on the interface. 1491 */ 1492 src0 = ip6->ip6_src; 1493 dst0 = ip6->ip6_dst; 1494 if ((error = in6_setscope(&src0, ifp, &iszone)) != 0 || 1495 (error = in6_setscope(&dst0, ifp, &idzone)) != 0) { 1496 IP6_STATINC(IP6_STAT_BADSCOPE); 1497 return (error); 1498 } 1499 for (mifp = mif6table, mifi = 0; mifi < nummifs; mifp++, mifi++) 1500 if (IF_ISSET(mifi, &rt->mf6c_ifset)) { 1501 if (mif6table[mifi].m6_ifp == NULL) 1502 continue; 1503 /* 1504 * check if the outgoing packet is going to break 1505 * a scope boundary. 1506 * XXX: For packets through PIM register tunnel 1507 * interface, we believe the routing daemon. 1508 */ 1509 if ((mif6table[rt->mf6c_parent].m6_flags & 1510 MIFF_REGISTER) == 0 && 1511 (mif6table[mifi].m6_flags & MIFF_REGISTER) == 0) { 1512 if (in6_setscope(&src0, mif6table[mifi].m6_ifp, 1513 &oszone) || 1514 in6_setscope(&dst0, mif6table[mifi].m6_ifp, 1515 &odzone) || 1516 iszone != oszone || idzone != odzone) { 1517 IP6_STATINC(IP6_STAT_BADSCOPE); 1518 continue; 1519 } 1520 } 1521 1522 mifp->m6_pkt_out++; 1523 mifp->m6_bytes_out += plen; 1524 MC6_SEND(ip6, mifp, m); 1525 } 1526 return 0; 1527 } 1528 1529 static void 1530 phyint_send(struct ip6_hdr *ip6, struct mif6 *mifp, struct mbuf *m) 1531 { 1532 struct mbuf *mb_copy; 1533 struct ifnet *ifp = mifp->m6_ifp; 1534 int error = 0; 1535 int s; 1536 static struct route ro; 1537 struct in6_multi *in6m; 1538 struct sockaddr_in6 dst6; 1539 u_long linkmtu; 1540 1541 s = splsoftnet(); 1542 /* 1543 * Make a new reference to the packet; make sure that 1544 * the IPv6 header is actually copied, not just referenced, 1545 * so that ip6_output() only scribbles on the copy. 1546 */ 1547 mb_copy = m_copy(m, 0, M_COPYALL); 1548 if (mb_copy && 1549 (M_READONLY(mb_copy) || mb_copy->m_len < sizeof(struct ip6_hdr))) 1550 mb_copy = m_pullup(mb_copy, sizeof(struct ip6_hdr)); 1551 if (mb_copy == NULL) { 1552 splx(s); 1553 return; 1554 } 1555 /* set MCAST flag to the outgoing packet */ 1556 mb_copy->m_flags |= M_MCAST; 1557 1558 /* 1559 * If we sourced the packet, call ip6_output since we may divide 1560 * the packet into fragments when the packet is too big for the 1561 * outgoing interface. 1562 * Otherwise, we can simply send the packet to the interface 1563 * sending queue. 1564 */ 1565 if (m->m_pkthdr.rcvif == NULL) { 1566 struct ip6_moptions im6o; 1567 1568 im6o.im6o_multicast_ifp = ifp; 1569 /* XXX: ip6_output will override ip6->ip6_hlim */ 1570 im6o.im6o_multicast_hlim = ip6->ip6_hlim; 1571 im6o.im6o_multicast_loop = 1; 1572 error = ip6_output(mb_copy, NULL, &ro, IPV6_FORWARDING, 1573 &im6o, NULL, NULL); 1574 1575 #ifdef MRT6DEBUG 1576 if (mrt6debug & DEBUG_XMIT) 1577 log(LOG_DEBUG, "phyint_send on mif %td err %d\n", 1578 mifp - mif6table, error); 1579 #endif 1580 splx(s); 1581 return; 1582 } 1583 1584 /* 1585 * If we belong to the destination multicast group 1586 * on the outgoing interface, loop back a copy. 1587 */ 1588 /* 1589 * Does not have to check source info, as it's alreay covered by 1590 * ip6_input 1591 */ 1592 sockaddr_in6_init(&dst6, &ip6->ip6_dst, 0, 0, 0); 1593 1594 IN6_LOOKUP_MULTI(ip6->ip6_dst, ifp, in6m); 1595 if (in6m != NULL) { 1596 ip6_mloopback(ifp, m, 1597 satocsin6(rtcache_getdst(&ro))); 1598 } 1599 1600 /* 1601 * Put the packet into the sending queue of the outgoing interface 1602 * if it would fit in the MTU of the interface. 1603 */ 1604 linkmtu = IN6_LINKMTU(ifp); 1605 if (mb_copy->m_pkthdr.len <= linkmtu || linkmtu < IPV6_MMTU) { 1606 /* 1607 * We could call if_output directly here, but we use 1608 * nd6_output on purpose to see if IPv6 operation is allowed 1609 * on the interface. 1610 */ 1611 error = nd6_output(ifp, ifp, mb_copy, &dst6, NULL); 1612 #ifdef MRT6DEBUG 1613 if (mrt6debug & DEBUG_XMIT) 1614 log(LOG_DEBUG, "phyint_send on mif %td err %d\n", 1615 mifp - mif6table, error); 1616 #endif 1617 } else { 1618 /* 1619 * pMTU discovery is intentionally disabled by default, since 1620 * various router may notify pMTU in multicast, which can be 1621 * a DDoS to a router 1622 */ 1623 if (ip6_mcast_pmtu) 1624 icmp6_error(mb_copy, ICMP6_PACKET_TOO_BIG, 0, linkmtu); 1625 else { 1626 #ifdef MRT6DEBUG 1627 if (mrt6debug & DEBUG_XMIT) 1628 log(LOG_DEBUG, 1629 "phyint_send: packet too big on %s o %s g %s" 1630 " size %d(discarded)\n", 1631 if_name(ifp), 1632 ip6_sprintf(&ip6->ip6_src), 1633 ip6_sprintf(&ip6->ip6_dst), 1634 mb_copy->m_pkthdr.len); 1635 #endif /* MRT6DEBUG */ 1636 m_freem(mb_copy); /* simply discard the packet */ 1637 } 1638 } 1639 1640 splx(s); 1641 } 1642 1643 static int 1644 register_send(struct ip6_hdr *ip6, struct mif6 *mif, struct mbuf *m) 1645 { 1646 struct mbuf *mm; 1647 int i, len = m->m_pkthdr.len; 1648 struct sockaddr_in6 sin6; 1649 struct mrt6msg *im6; 1650 1651 #ifdef MRT6DEBUG 1652 if (mrt6debug) 1653 log(LOG_DEBUG, "** IPv6 register_send **\n src %s dst %s\n", 1654 ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst)); 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_copy(m, 0, M_COPYALL)) == 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 /* TODO: check it! */ 1676 mm->m_pkthdr.len = len + sizeof(struct ip6_hdr); 1677 1678 /* 1679 * Send message to routing daemon 1680 */ 1681 sockaddr_in6_init(&sin6, &ip6->ip6_src, 0, 0, 0); 1682 1683 im6 = mtod(mm, struct mrt6msg *); 1684 im6->im6_msgtype = MRT6MSG_WHOLEPKT; 1685 im6->im6_mbz = 0; 1686 1687 im6->im6_mif = mif - mif6table; 1688 1689 /* iif info is not given for reg. encap.n */ 1690 mrt6stat.mrt6s_upcalls++; 1691 1692 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1693 #ifdef MRT6DEBUG 1694 if (mrt6debug) 1695 log(LOG_WARNING, 1696 "register_send: ip6_mrouter socket queue full\n"); 1697 #endif 1698 ++mrt6stat.mrt6s_upq_sockfull; 1699 return ENOBUFS; 1700 } 1701 return 0; 1702 } 1703 1704 /* 1705 * PIM sparse mode hook 1706 * Receives the pim control messages, and passes them up to the listening 1707 * socket, using rip6_input. 1708 * The only message processed is the REGISTER pim message; the pim header 1709 * is stripped off, and the inner packet is passed to register_mforward. 1710 */ 1711 int 1712 pim6_input(struct mbuf **mp, int *offp, int proto) 1713 { 1714 struct pim *pim; /* pointer to a pim struct */ 1715 struct ip6_hdr *ip6; 1716 int pimlen; 1717 struct mbuf *m = *mp; 1718 int minlen; 1719 int off = *offp; 1720 1721 PIM6_STATINC(PIM6_STAT_RCV_TOTAL); 1722 1723 ip6 = mtod(m, struct ip6_hdr *); 1724 pimlen = m->m_pkthdr.len - *offp; 1725 1726 /* 1727 * Validate lengths 1728 */ 1729 if (pimlen < PIM_MINLEN) { 1730 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1731 #ifdef MRT6DEBUG 1732 if (mrt6debug & DEBUG_PIM) 1733 log(LOG_DEBUG,"pim6_input: PIM packet too short\n"); 1734 #endif 1735 m_freem(m); 1736 return (IPPROTO_DONE); 1737 } 1738 1739 /* 1740 * if the packet is at least as big as a REGISTER, go ahead 1741 * and grab the PIM REGISTER header size, to avoid another 1742 * possible m_pullup() later. 1743 * 1744 * PIM_MINLEN == pimhdr + u_int32 == 8 1745 * PIM6_REG_MINLEN == pimhdr + reghdr + eip6hdr == 4 + 4 + 40 1746 */ 1747 minlen = (pimlen >= PIM6_REG_MINLEN) ? PIM6_REG_MINLEN : PIM_MINLEN; 1748 1749 /* 1750 * Make sure that the IP6 and PIM headers in contiguous memory, and 1751 * possibly the PIM REGISTER header 1752 */ 1753 IP6_EXTHDR_GET(pim, struct pim *, m, off, minlen); 1754 if (pim == NULL) { 1755 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1756 return IPPROTO_DONE; 1757 } 1758 1759 /* PIM version check */ 1760 if (pim->pim_ver != PIM_VERSION) { 1761 PIM6_STATINC(PIM6_STAT_RCV_BADVERSION); 1762 #ifdef MRT6DEBUG 1763 log(LOG_ERR, 1764 "pim6_input: incorrect version %d, expecting %d\n", 1765 pim->pim_ver, PIM_VERSION); 1766 #endif 1767 m_freem(m); 1768 return (IPPROTO_DONE); 1769 } 1770 1771 #define PIM6_CHECKSUM 1772 #ifdef PIM6_CHECKSUM 1773 { 1774 int cksumlen; 1775 1776 /* 1777 * Validate checksum. 1778 * If PIM REGISTER, exclude the data packet 1779 */ 1780 if (pim->pim_type == PIM_REGISTER) 1781 cksumlen = PIM_MINLEN; 1782 else 1783 cksumlen = pimlen; 1784 1785 if (in6_cksum(m, IPPROTO_PIM, off, cksumlen)) { 1786 PIM6_STATINC(PIM6_STAT_RCV_BADSUM); 1787 #ifdef MRT6DEBUG 1788 if (mrt6debug & DEBUG_PIM) 1789 log(LOG_DEBUG, 1790 "pim6_input: invalid checksum\n"); 1791 #endif 1792 m_freem(m); 1793 return (IPPROTO_DONE); 1794 } 1795 } 1796 #endif /* PIM_CHECKSUM */ 1797 1798 if (pim->pim_type == PIM_REGISTER) { 1799 /* 1800 * since this is a REGISTER, we'll make a copy of the register 1801 * headers ip6+pim+u_int32_t+encap_ip6, to be passed up to the 1802 * routing daemon. 1803 */ 1804 static const struct sockaddr_in6 dst = { 1805 .sin6_len = sizeof(dst), 1806 .sin6_family = AF_INET6, 1807 }; 1808 1809 struct mbuf *mcp; 1810 struct ip6_hdr *eip6; 1811 u_int32_t *reghdr; 1812 1813 PIM6_STATINC(PIM6_STAT_RCV_REGISTERS); 1814 1815 if ((reg_mif_num >= nummifs) || (reg_mif_num == (mifi_t) -1)) { 1816 #ifdef MRT6DEBUG 1817 if (mrt6debug & DEBUG_PIM) 1818 log(LOG_DEBUG, 1819 "pim6_input: register mif not set: %d\n", 1820 reg_mif_num); 1821 #endif 1822 m_freem(m); 1823 return (IPPROTO_DONE); 1824 } 1825 1826 reghdr = (u_int32_t *)(pim + 1); 1827 1828 if ((ntohl(*reghdr) & PIM_NULL_REGISTER)) 1829 goto pim6_input_to_daemon; 1830 1831 /* 1832 * Validate length 1833 */ 1834 if (pimlen < PIM6_REG_MINLEN) { 1835 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1836 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1837 #ifdef MRT6DEBUG 1838 log(LOG_ERR, 1839 "pim6_input: register packet size too " 1840 "small %d from %s\n", 1841 pimlen, ip6_sprintf(&ip6->ip6_src)); 1842 #endif 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 log(LOG_DEBUG, 1851 "pim6_input[register], eip6: %s -> %s, " 1852 "eip6 plen %d\n", 1853 ip6_sprintf(&eip6->ip6_src), 1854 ip6_sprintf(&eip6->ip6_dst), 1855 ntohs(eip6->ip6_plen)); 1856 #endif 1857 1858 /* verify the version number of the inner packet */ 1859 if ((eip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) { 1860 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1861 #ifdef MRT6DEBUG 1862 log(LOG_DEBUG, "pim6_input: invalid IP version (%d) " 1863 "of the inner packet\n", 1864 (eip6->ip6_vfc & IPV6_VERSION)); 1865 #endif 1866 m_freem(m); 1867 return (IPPROTO_NONE); 1868 } 1869 1870 /* verify the inner packet is destined to a mcast group */ 1871 if (!IN6_IS_ADDR_MULTICAST(&eip6->ip6_dst)) { 1872 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1873 #ifdef MRT6DEBUG 1874 if (mrt6debug & DEBUG_PIM) 1875 log(LOG_DEBUG, 1876 "pim6_input: inner packet of register " 1877 "is not multicast %s\n", 1878 ip6_sprintf(&eip6->ip6_dst)); 1879 #endif 1880 m_freem(m); 1881 return (IPPROTO_DONE); 1882 } 1883 1884 /* 1885 * make a copy of the whole header to pass to the daemon later. 1886 */ 1887 mcp = m_copy(m, 0, off + PIM6_REG_MINLEN); 1888 if (mcp == NULL) { 1889 #ifdef MRT6DEBUG 1890 log(LOG_ERR, 1891 "pim6_input: pim register: " 1892 "could not copy register head\n"); 1893 #endif 1894 m_freem(m); 1895 return (IPPROTO_DONE); 1896 } 1897 1898 /* 1899 * forward the inner ip6 packet; point m_data at the inner ip6. 1900 */ 1901 m_adj(m, off + PIM_MINLEN); 1902 #ifdef MRT6DEBUG 1903 if (mrt6debug & DEBUG_PIM) { 1904 log(LOG_DEBUG, 1905 "pim6_input: forwarding decapsulated register: " 1906 "src %s, dst %s, mif %d\n", 1907 ip6_sprintf(&eip6->ip6_src), 1908 ip6_sprintf(&eip6->ip6_dst), 1909 reg_mif_num); 1910 } 1911 #endif 1912 1913 looutput(mif6table[reg_mif_num].m6_ifp, m, 1914 (struct sockaddr *)__UNCONST(&dst), NULL); 1915 1916 /* prepare the register head to send to the mrouting daemon */ 1917 m = mcp; 1918 } 1919 1920 /* 1921 * Pass the PIM message up to the daemon; if it is a register message 1922 * pass the 'head' only up to the daemon. This includes the 1923 * encapsulator ip6 header, pim header, register header and the 1924 * encapsulated ip6 header. 1925 */ 1926 pim6_input_to_daemon: 1927 rip6_input(&m, offp, proto); 1928 return (IPPROTO_DONE); 1929 } 1930 1931 static int 1932 sysctl_net_inet6_pim6_stats(SYSCTLFN_ARGS) 1933 { 1934 1935 return (NETSTAT_SYSCTL(pim6stat_percpu, PIM6_NSTATS)); 1936 } 1937 1938 static void 1939 sysctl_net_inet6_pim6_setup(struct sysctllog **clog) 1940 { 1941 sysctl_createv(clog, 0, NULL, NULL, 1942 CTLFLAG_PERMANENT, 1943 CTLTYPE_NODE, "net", NULL, 1944 NULL, 0, NULL, 0, 1945 CTL_NET, CTL_EOL); 1946 sysctl_createv(clog, 0, NULL, NULL, 1947 CTLFLAG_PERMANENT, 1948 CTLTYPE_NODE, "inet6", NULL, 1949 NULL, 0, NULL, 0, 1950 CTL_NET, PF_INET6, CTL_EOL); 1951 sysctl_createv(clog, 0, NULL, NULL, 1952 CTLFLAG_PERMANENT, 1953 CTLTYPE_NODE, "pim6", 1954 SYSCTL_DESCR("PIMv6 settings"), 1955 NULL, 0, NULL, 0, 1956 CTL_NET, PF_INET6, IPPROTO_PIM, CTL_EOL); 1957 1958 sysctl_createv(clog, 0, NULL, NULL, 1959 CTLFLAG_PERMANENT, 1960 CTLTYPE_STRUCT, "stats", 1961 SYSCTL_DESCR("PIMv6 statistics"), 1962 sysctl_net_inet6_pim6_stats, 0, NULL, 0, 1963 CTL_NET, PF_INET6, IPPROTO_PIM, PIM6CTL_STATS, 1964 CTL_EOL); 1965 } 1966
Indexes created Wed Sep 24 05:09:52 GMT 2025