ip6_mroute.c revision 1.94
1 /* $NetBSD: ip6_mroute.c,v 1.94 2008/05/22 01:06:39 dyoung 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 1.94 2008/05/22 01:06:39 dyoung 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 get_pim6(struct mbuf *); 165 static int socket_send(struct socket *, struct mbuf *, 166 struct sockaddr_in6 *); 167 static int register_send(struct ip6_hdr *, struct mif6 *, struct mbuf *); 168 169 /* 170 * Globals. All but ip6_mrouter, ip6_mrtproto and mrt6stat could be static, 171 * except for netstat or debugging purposes. 172 */ 173 struct socket *ip6_mrouter = NULL; 174 int ip6_mrouter_ver = 0; 175 int ip6_mrtproto = IPPROTO_PIM; /* for netstat only */ 176 struct mrt6stat mrt6stat; 177 178 #define NO_RTE_FOUND 0x1 179 #define RTE_FOUND 0x2 180 181 struct mf6c *mf6ctable[MF6CTBLSIZ]; 182 u_char n6expire[MF6CTBLSIZ]; 183 struct mif6 mif6table[MAXMIFS]; 184 #ifdef MRT6DEBUG 185 u_int mrt6debug = 0; /* debug level */ 186 #define DEBUG_MFC 0x02 187 #define DEBUG_FORWARD 0x04 188 #define DEBUG_EXPIRE 0x08 189 #define DEBUG_XMIT 0x10 190 #define DEBUG_REG 0x20 191 #define DEBUG_PIM 0x40 192 #endif 193 194 static void expire_upcalls(void *); 195 #define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */ 196 #define UPCALL_EXPIRE 6 /* number of timeouts */ 197 198 #ifdef INET 199 #ifdef MROUTING 200 extern struct socket *ip_mrouter; 201 #endif 202 #endif 203 204 /* 205 * 'Interfaces' associated with decapsulator (so we can tell 206 * packets that went through it from ones that get reflected 207 * by a broken gateway). These interfaces are never linked into 208 * the system ifnet list & no routes point to them. I.e., packets 209 * can't be sent this way. They only exist as a placeholder for 210 * multicast source verification. 211 */ 212 struct ifnet multicast_register_if6; 213 214 #define ENCAP_HOPS 64 215 216 /* 217 * Private variables. 218 */ 219 static mifi_t nummifs = 0; 220 static mifi_t reg_mif_num = (mifi_t)-1; 221 222 static percpu_t *pim6stat_percpu; 223 224 #define PIM6_STATINC(x) _NET_STATINC(pim6stat_percpu, x) 225 226 static int pim6; 227 228 /* 229 * Hash function for a source, group entry 230 */ 231 #define MF6CHASH(a, g) MF6CHASHMOD((a).s6_addr32[0] ^ (a).s6_addr32[1] ^ \ 232 (a).s6_addr32[2] ^ (a).s6_addr32[3] ^ \ 233 (g).s6_addr32[0] ^ (g).s6_addr32[1] ^ \ 234 (g).s6_addr32[2] ^ (g).s6_addr32[3]) 235 236 /* 237 * Find a route for a given origin IPv6 address and Multicast group address. 238 * Quality of service parameter to be added in the future!!! 239 */ 240 241 #define MF6CFIND(o, g, rt) do { \ 242 struct mf6c *_rt = mf6ctable[MF6CHASH(o,g)]; \ 243 rt = NULL; \ 244 mrt6stat.mrt6s_mfc_lookups++; \ 245 while (_rt) { \ 246 if (IN6_ARE_ADDR_EQUAL(&_rt->mf6c_origin.sin6_addr, &(o)) && \ 247 IN6_ARE_ADDR_EQUAL(&_rt->mf6c_mcastgrp.sin6_addr, &(g)) && \ 248 (_rt->mf6c_stall == NULL)) { \ 249 rt = _rt; \ 250 break; \ 251 } \ 252 _rt = _rt->mf6c_next; \ 253 } \ 254 if (rt == NULL) { \ 255 mrt6stat.mrt6s_mfc_misses++; \ 256 } \ 257 } while (/*CONSTCOND*/ 0) 258 259 /* 260 * Macros to compute elapsed time efficiently 261 * Borrowed from Van Jacobson's scheduling code 262 */ 263 #define TV_DELTA(a, b, delta) do { \ 264 int xxs; \ 265 \ 266 delta = (a).tv_usec - (b).tv_usec; \ 267 if ((xxs = (a).tv_sec - (b).tv_sec)) { \ 268 switch (xxs) { \ 269 case 2: \ 270 delta += 1000000; \ 271 /* FALLTHROUGH */ \ 272 case 1: \ 273 delta += 1000000; \ 274 break; \ 275 default: \ 276 delta += (1000000 * xxs); \ 277 } \ 278 } \ 279 } while (/*CONSTCOND*/ 0) 280 281 #define TV_LT(a, b) (((a).tv_usec < (b).tv_usec && \ 282 (a).tv_sec <= (b).tv_sec) || (a).tv_sec < (b).tv_sec) 283 284 #ifdef UPCALL_TIMING 285 #define UPCALL_MAX 50 286 u_long upcall_data[UPCALL_MAX + 1]; 287 static void collate(); 288 #endif /* UPCALL_TIMING */ 289 290 static int get_sg_cnt(struct sioc_sg_req6 *); 291 static int get_mif6_cnt(struct sioc_mif_req6 *); 292 static int ip6_mrouter_init(struct socket *, int, int); 293 static int add_m6if(struct mif6ctl *); 294 static int del_m6if(mifi_t *); 295 static int add_m6fc(struct mf6cctl *); 296 static int del_m6fc(struct mf6cctl *); 297 298 static callout_t expire_upcalls_ch; 299 300 void 301 pim6_init(void) 302 { 303 304 pim6stat_percpu = percpu_alloc(sizeof(uint64_t) * PIM6_NSTATS); 305 } 306 307 /* 308 * Handle MRT setsockopt commands to modify the multicast routing tables. 309 */ 310 int 311 ip6_mrouter_set(int cmd, struct socket *so, struct mbuf *m) 312 { 313 if (cmd != MRT6_INIT && so != ip6_mrouter) 314 return (EACCES); 315 316 switch (cmd) { 317 #ifdef MRT6_OINIT 318 case MRT6_OINIT: 319 #endif 320 case MRT6_INIT: 321 if (m == NULL || m->m_len != sizeof(int)) 322 return (EINVAL); 323 return (ip6_mrouter_init(so, *mtod(m, int *), cmd)); 324 case MRT6_DONE: 325 return (ip6_mrouter_done()); 326 case MRT6_ADD_MIF: 327 if (m == NULL || m->m_len != sizeof(struct mif6ctl)) 328 return (EINVAL); 329 return (add_m6if(mtod(m, struct mif6ctl *))); 330 case MRT6_DEL_MIF: 331 if (m == NULL || m->m_len != sizeof(mifi_t)) 332 return (EINVAL); 333 return (del_m6if(mtod(m, mifi_t *))); 334 case MRT6_ADD_MFC: 335 if (m == NULL || m->m_len != sizeof(struct mf6cctl)) 336 return (EINVAL); 337 return (add_m6fc(mtod(m, struct mf6cctl *))); 338 case MRT6_DEL_MFC: 339 if (m == NULL || m->m_len != sizeof(struct mf6cctl)) 340 return (EINVAL); 341 return (del_m6fc(mtod(m, struct mf6cctl *))); 342 case MRT6_PIM: 343 if (m == NULL || m->m_len != sizeof(int)) 344 return (EINVAL); 345 return (set_pim6(mtod(m, int *))); 346 default: 347 return (EOPNOTSUPP); 348 } 349 } 350 351 /* 352 * Handle MRT getsockopt commands 353 */ 354 int 355 ip6_mrouter_get(int cmd, struct socket *so, struct mbuf **m) 356 { 357 struct mbuf *mb; 358 359 if (so != ip6_mrouter) return EACCES; 360 361 *m = mb = m_get(M_WAIT, MT_SOOPTS); 362 363 switch (cmd) { 364 case MRT6_PIM: 365 return get_pim6(mb); 366 default: 367 m_free(mb); 368 return EOPNOTSUPP; 369 } 370 } 371 372 /* 373 * Handle ioctl commands to obtain information from the cache 374 */ 375 int 376 mrt6_ioctl(int cmd, void *data) 377 { 378 379 switch (cmd) { 380 case SIOCGETSGCNT_IN6: 381 return (get_sg_cnt((struct sioc_sg_req6 *)data)); 382 case SIOCGETMIFCNT_IN6: 383 return (get_mif6_cnt((struct sioc_mif_req6 *)data)); 384 default: 385 return (EINVAL); 386 } 387 } 388 389 /* 390 * returns the packet, byte, rpf-failure count for the source group provided 391 */ 392 static int 393 get_sg_cnt(struct sioc_sg_req6 *req) 394 { 395 struct mf6c *rt; 396 int s; 397 398 s = splsoftnet(); 399 MF6CFIND(req->src.sin6_addr, req->grp.sin6_addr, rt); 400 splx(s); 401 if (rt != NULL) { 402 req->pktcnt = rt->mf6c_pkt_cnt; 403 req->bytecnt = rt->mf6c_byte_cnt; 404 req->wrong_if = rt->mf6c_wrong_if; 405 } else 406 return (ESRCH); 407 #if 0 408 req->pktcnt = req->bytecnt = req->wrong_if = 0xffffffff; 409 #endif 410 411 return 0; 412 } 413 414 /* 415 * returns the input and output packet and byte counts on the mif provided 416 */ 417 static int 418 get_mif6_cnt(struct sioc_mif_req6 *req) 419 { 420 mifi_t mifi = req->mifi; 421 422 if (mifi >= nummifs) 423 return EINVAL; 424 425 req->icount = mif6table[mifi].m6_pkt_in; 426 req->ocount = mif6table[mifi].m6_pkt_out; 427 req->ibytes = mif6table[mifi].m6_bytes_in; 428 req->obytes = mif6table[mifi].m6_bytes_out; 429 430 return 0; 431 } 432 433 /* 434 * Get PIM processiong global 435 */ 436 static int 437 get_pim6(struct mbuf *m) 438 { 439 int *i; 440 441 i = mtod(m, int *); 442 443 *i = pim6; 444 445 return 0; 446 } 447 448 static int 449 set_pim6(int *i) 450 { 451 if ((*i != 1) && (*i != 0)) 452 return EINVAL; 453 454 pim6 = *i; 455 456 return 0; 457 } 458 459 /* 460 * Enable multicast routing 461 */ 462 static int 463 ip6_mrouter_init(struct socket *so, int v, int cmd) 464 { 465 #ifdef MRT6DEBUG 466 if (mrt6debug) 467 log(LOG_DEBUG, 468 "ip6_mrouter_init: so_type = %d, pr_protocol = %d\n", 469 so->so_type, so->so_proto->pr_protocol); 470 #endif 471 472 if (so->so_type != SOCK_RAW || 473 so->so_proto->pr_protocol != IPPROTO_ICMPV6) 474 return (EOPNOTSUPP); 475 476 if (v != 1) 477 return (ENOPROTOOPT); 478 479 if (ip6_mrouter != NULL) 480 return (EADDRINUSE); 481 482 ip6_mrouter = so; 483 ip6_mrouter_ver = cmd; 484 485 bzero((void *)mf6ctable, sizeof(mf6ctable)); 486 bzero((void *)n6expire, sizeof(n6expire)); 487 488 pim6 = 0;/* used for stubbing out/in pim stuff */ 489 490 callout_init(&expire_upcalls_ch, CALLOUT_MPSAFE); 491 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 492 expire_upcalls, NULL); 493 494 #ifdef MRT6DEBUG 495 if (mrt6debug) 496 log(LOG_DEBUG, "ip6_mrouter_init\n"); 497 #endif 498 499 return 0; 500 } 501 502 /* 503 * Disable multicast routing 504 */ 505 int 506 ip6_mrouter_done(void) 507 { 508 mifi_t mifi; 509 int i; 510 struct ifnet *ifp; 511 struct in6_ifreq ifr; 512 struct mf6c *rt; 513 struct rtdetq *rte; 514 int s; 515 516 s = splsoftnet(); 517 518 /* 519 * For each phyint in use, disable promiscuous reception of all IPv6 520 * multicasts. 521 */ 522 #ifdef INET 523 #ifdef MROUTING 524 /* 525 * If there is still IPv4 multicast routing daemon, 526 * we remain interfaces to receive all muliticasted packets. 527 * XXX: there may be an interface in which the IPv4 multicast 528 * daemon is not interested... 529 */ 530 if (!ip_mrouter) 531 #endif 532 #endif 533 { 534 for (mifi = 0; mifi < nummifs; mifi++) { 535 if (mif6table[mifi].m6_ifp && 536 !(mif6table[mifi].m6_flags & MIFF_REGISTER)) { 537 ifr.ifr_addr.sin6_family = AF_INET6; 538 ifr.ifr_addr.sin6_addr= in6addr_any; 539 ifp = mif6table[mifi].m6_ifp; 540 (*ifp->if_ioctl)(ifp, SIOCDELMULTI, &ifr); 541 } 542 } 543 } 544 #ifdef notyet 545 bzero((void *)qtable, sizeof(qtable)); 546 bzero((void *)tbftable, sizeof(tbftable)); 547 #endif 548 bzero((void *)mif6table, sizeof(mif6table)); 549 nummifs = 0; 550 551 pim6 = 0; /* used to stub out/in pim specific code */ 552 553 callout_stop(&expire_upcalls_ch); 554 555 /* 556 * Free all multicast forwarding cache entries. 557 */ 558 for (i = 0; i < MF6CTBLSIZ; i++) { 559 rt = mf6ctable[i]; 560 while (rt) { 561 struct mf6c *frt; 562 563 for (rte = rt->mf6c_stall; rte != NULL; ) { 564 struct rtdetq *n = rte->next; 565 566 m_free(rte->m); 567 free(rte, M_MRTABLE); 568 rte = n; 569 } 570 frt = rt; 571 rt = rt->mf6c_next; 572 free(frt, M_MRTABLE); 573 } 574 } 575 576 bzero((void *)mf6ctable, sizeof(mf6ctable)); 577 578 /* 579 * Reset register interface 580 */ 581 if (reg_mif_num != (mifi_t)-1) { 582 if_detach(&multicast_register_if6); 583 reg_mif_num = (mifi_t)-1; 584 } 585 586 ip6_mrouter = NULL; 587 ip6_mrouter_ver = 0; 588 589 splx(s); 590 591 #ifdef MRT6DEBUG 592 if (mrt6debug) 593 log(LOG_DEBUG, "ip6_mrouter_done\n"); 594 #endif 595 596 return 0; 597 } 598 599 void 600 ip6_mrouter_detach(struct ifnet *ifp) 601 { 602 struct rtdetq *rte; 603 struct mf6c *mfc; 604 mifi_t mifi; 605 int i; 606 607 if (ip6_mrouter == NULL) 608 return; 609 610 /* 611 * Delete a mif which points to ifp. 612 */ 613 for (mifi = 0; mifi < nummifs; mifi++) 614 if (mif6table[mifi].m6_ifp == ifp) 615 del_m6if(&mifi); 616 617 /* 618 * Clear rte->ifp of cache entries received on ifp. 619 */ 620 for (i = 0; i < MF6CTBLSIZ; i++) { 621 if (n6expire[i] == 0) 622 continue; 623 624 for (mfc = mf6ctable[i]; mfc != NULL; mfc = mfc->mf6c_next) { 625 for (rte = mfc->mf6c_stall; rte != NULL; rte = rte->next) { 626 if (rte->ifp == ifp) 627 rte->ifp = NULL; 628 } 629 } 630 } 631 } 632 633 634 /* 635 * Add a mif to the mif table 636 */ 637 static int 638 add_m6if(struct mif6ctl *mifcp) 639 { 640 struct mif6 *mifp; 641 struct ifnet *ifp; 642 struct in6_ifreq ifr; 643 int error, s; 644 #ifdef notyet 645 struct tbf *m_tbf = tbftable + mifcp->mif6c_mifi; 646 #endif 647 648 if (mifcp->mif6c_mifi >= MAXMIFS) 649 return EINVAL; 650 mifp = mif6table + mifcp->mif6c_mifi; 651 if (mifp->m6_ifp) 652 return EADDRINUSE; /* XXX: is it appropriate? */ 653 if (mifcp->mif6c_pifi == 0 || mifcp->mif6c_pifi >= if_indexlim) 654 return ENXIO; 655 /* 656 * XXX: some OSes can remove ifp and clear ifindex2ifnet[id] 657 * even for id between 0 and if_index. 658 */ 659 if ((ifp = ifindex2ifnet[mifcp->mif6c_pifi]) == NULL) 660 return ENXIO; 661 662 if (mifcp->mif6c_flags & MIFF_REGISTER) { 663 ifp = &multicast_register_if6; 664 665 if (reg_mif_num == (mifi_t)-1) { 666 strlcpy(ifp->if_xname, "register_mif", 667 sizeof(ifp->if_xname)); 668 ifp->if_flags |= IFF_LOOPBACK; 669 ifp->if_index = mifcp->mif6c_mifi; 670 reg_mif_num = mifcp->mif6c_mifi; 671 if_attach(ifp); 672 } 673 674 } /* if REGISTER */ 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 ifr.ifr_addr.sin6_family = AF_INET6; 686 ifr.ifr_addr.sin6_addr = in6addr_any; 687 error = (*ifp->if_ioctl)(ifp, SIOCADDMULTI, &ifr); 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 in6_ifreq ifr; 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 ifr.ifr_addr.sin6_family = AF_INET6; 748 ifr.ifr_addr.sin6_addr = in6addr_any; 749 (*ifp->if_ioctl)(ifp, SIOCDELMULTI, &ifr); 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 bzero((void *)qtable[*mifip], sizeof(qtable[*mifip])); 759 bzero((void *)mifp->m6_tbf, sizeof(*(mifp->m6_tbf))); 760 #endif 761 bzero((void *)mifp, 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; 790 791 MF6CFIND(mfccp->mf6cc_origin.sin6_addr, 792 mfccp->mf6cc_mcastgrp.sin6_addr, rt); 793 794 /* If an entry already exists, just update the fields */ 795 if (rt) { 796 #ifdef MRT6DEBUG 797 if (mrt6debug & DEBUG_MFC) 798 log(LOG_DEBUG,"add_m6fc update o %s g %s p %x\n", 799 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 800 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 801 mfccp->mf6cc_parent); 802 #endif 803 804 s = splsoftnet(); 805 rt->mf6c_parent = mfccp->mf6cc_parent; 806 rt->mf6c_ifset = mfccp->mf6cc_ifset; 807 splx(s); 808 return 0; 809 } 810 811 /* 812 * Find the entry for which the upcall was made and update 813 */ 814 s = splsoftnet(); 815 hash = MF6CHASH(mfccp->mf6cc_origin.sin6_addr, 816 mfccp->mf6cc_mcastgrp.sin6_addr); 817 for (rt = mf6ctable[hash], nstl = 0; rt; rt = rt->mf6c_next) { 818 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 819 &mfccp->mf6cc_origin.sin6_addr) && 820 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 821 &mfccp->mf6cc_mcastgrp.sin6_addr) && 822 (rt->mf6c_stall != NULL)) { 823 824 if (nstl++) 825 log(LOG_ERR, 826 "add_m6fc: %s o %s g %s p %x dbx %p\n", 827 "multiple kernel entries", 828 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 829 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 830 mfccp->mf6cc_parent, rt->mf6c_stall); 831 832 #ifdef MRT6DEBUG 833 if (mrt6debug & DEBUG_MFC) 834 log(LOG_DEBUG, 835 "add_m6fc o %s g %s p %x dbg %p\n", 836 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 837 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 838 mfccp->mf6cc_parent, rt->mf6c_stall); 839 #endif 840 841 rt->mf6c_origin = mfccp->mf6cc_origin; 842 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 843 rt->mf6c_parent = mfccp->mf6cc_parent; 844 rt->mf6c_ifset = mfccp->mf6cc_ifset; 845 /* initialize pkt counters per src-grp */ 846 rt->mf6c_pkt_cnt = 0; 847 rt->mf6c_byte_cnt = 0; 848 rt->mf6c_wrong_if = 0; 849 850 rt->mf6c_expire = 0; /* Don't clean this guy up */ 851 n6expire[hash]--; 852 853 /* free packets Qed at the end of this entry */ 854 for (rte = rt->mf6c_stall; rte != NULL; ) { 855 struct rtdetq *n = rte->next; 856 if (rte->ifp) { 857 ip6_mdq(rte->m, rte->ifp, rt); 858 } 859 m_freem(rte->m); 860 #ifdef UPCALL_TIMING 861 collate(&(rte->t)); 862 #endif /* UPCALL_TIMING */ 863 free(rte, M_MRTABLE); 864 rte = n; 865 } 866 rt->mf6c_stall = NULL; 867 } 868 } 869 870 /* 871 * It is possible that an entry is being inserted without an upcall 872 */ 873 if (nstl == 0) { 874 #ifdef MRT6DEBUG 875 if (mrt6debug & DEBUG_MFC) 876 log(LOG_DEBUG, 877 "add_mfc no upcall h %ld o %s g %s p %x\n", 878 hash, 879 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 880 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 881 mfccp->mf6cc_parent); 882 #endif 883 884 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 885 886 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 887 &mfccp->mf6cc_origin.sin6_addr)&& 888 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 889 &mfccp->mf6cc_mcastgrp.sin6_addr)) { 890 891 rt->mf6c_origin = mfccp->mf6cc_origin; 892 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 893 rt->mf6c_parent = mfccp->mf6cc_parent; 894 rt->mf6c_ifset = mfccp->mf6cc_ifset; 895 /* initialize pkt counters per src-grp */ 896 rt->mf6c_pkt_cnt = 0; 897 rt->mf6c_byte_cnt = 0; 898 rt->mf6c_wrong_if = 0; 899 900 if (rt->mf6c_expire) 901 n6expire[hash]--; 902 rt->mf6c_expire = 0; 903 } 904 } 905 if (rt == NULL) { 906 /* no upcall, so make a new entry */ 907 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE, 908 M_NOWAIT); 909 if (rt == NULL) { 910 splx(s); 911 return ENOBUFS; 912 } 913 914 /* insert new entry at head of hash chain */ 915 rt->mf6c_origin = mfccp->mf6cc_origin; 916 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 917 rt->mf6c_parent = mfccp->mf6cc_parent; 918 rt->mf6c_ifset = mfccp->mf6cc_ifset; 919 /* initialize pkt counters per src-grp */ 920 rt->mf6c_pkt_cnt = 0; 921 rt->mf6c_byte_cnt = 0; 922 rt->mf6c_wrong_if = 0; 923 rt->mf6c_expire = 0; 924 rt->mf6c_stall = NULL; 925 926 /* link into table */ 927 rt->mf6c_next = mf6ctable[hash]; 928 mf6ctable[hash] = rt; 929 } 930 } 931 splx(s); 932 return 0; 933 } 934 935 #ifdef UPCALL_TIMING 936 /* 937 * collect delay statistics on the upcalls 938 */ 939 static void 940 collate(struct timeval *t) 941 { 942 u_long d; 943 struct timeval tp; 944 u_long delta; 945 946 GET_TIME(tp); 947 948 if (TV_LT(*t, tp)) 949 { 950 TV_DELTA(tp, *t, delta); 951 952 d = delta >> 10; 953 if (d > UPCALL_MAX) 954 d = UPCALL_MAX; 955 956 ++upcall_data[d]; 957 } 958 } 959 #endif /* UPCALL_TIMING */ 960 961 /* 962 * Delete an mfc entry 963 */ 964 static int 965 del_m6fc(struct mf6cctl *mfccp) 966 { 967 struct sockaddr_in6 origin; 968 struct sockaddr_in6 mcastgrp; 969 struct mf6c *rt; 970 struct mf6c **nptr; 971 u_long hash; 972 int s; 973 974 origin = mfccp->mf6cc_origin; 975 mcastgrp = mfccp->mf6cc_mcastgrp; 976 hash = MF6CHASH(origin.sin6_addr, mcastgrp.sin6_addr); 977 978 #ifdef MRT6DEBUG 979 if (mrt6debug & DEBUG_MFC) 980 log(LOG_DEBUG,"del_m6fc orig %s mcastgrp %s\n", 981 ip6_sprintf(&origin.sin6_addr), 982 ip6_sprintf(&mcastgrp.sin6_addr)); 983 #endif 984 985 s = splsoftnet(); 986 987 nptr = &mf6ctable[hash]; 988 while ((rt = *nptr) != NULL) { 989 if (IN6_ARE_ADDR_EQUAL(&origin.sin6_addr, 990 &rt->mf6c_origin.sin6_addr) && 991 IN6_ARE_ADDR_EQUAL(&mcastgrp.sin6_addr, 992 &rt->mf6c_mcastgrp.sin6_addr) && 993 rt->mf6c_stall == NULL) 994 break; 995 996 nptr = &rt->mf6c_next; 997 } 998 if (rt == NULL) { 999 splx(s); 1000 return EADDRNOTAVAIL; 1001 } 1002 1003 *nptr = rt->mf6c_next; 1004 free(rt, M_MRTABLE); 1005 1006 splx(s); 1007 1008 return 0; 1009 } 1010 1011 static int 1012 socket_send(struct socket *s, struct mbuf *mm, struct sockaddr_in6 *src) 1013 { 1014 if (s) { 1015 if (sbappendaddr(&s->so_rcv, 1016 (struct sockaddr *)src, 1017 mm, (struct mbuf *)0) != 0) { 1018 sorwakeup(s); 1019 return 0; 1020 } 1021 } 1022 m_freem(mm); 1023 return -1; 1024 } 1025 1026 /* 1027 * IPv6 multicast forwarding function. This function assumes that the packet 1028 * pointed to by "ip6" has arrived on (or is about to be sent to) the interface 1029 * pointed to by "ifp", and the packet is to be relayed to other networks 1030 * that have members of the packet's destination IPv6 multicast group. 1031 * 1032 * The packet is returned unscathed to the caller, unless it is 1033 * erroneous, in which case a non-zero return value tells the caller to 1034 * discard it. 1035 */ 1036 1037 int 1038 ip6_mforward(struct ip6_hdr *ip6, struct ifnet *ifp, struct mbuf *m) 1039 { 1040 struct mf6c *rt; 1041 struct mif6 *mifp; 1042 struct mbuf *mm; 1043 int s; 1044 mifi_t mifi; 1045 struct sockaddr_in6 sin6; 1046 1047 #ifdef MRT6DEBUG 1048 if (mrt6debug & DEBUG_FORWARD) 1049 log(LOG_DEBUG, "ip6_mforward: src %s, dst %s, ifindex %d\n", 1050 ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst), 1051 ifp->if_index); 1052 #endif 1053 1054 /* 1055 * Don't forward a packet with Hop limit of zero or one, 1056 * or a packet destined to a local-only group. 1057 */ 1058 if (ip6->ip6_hlim <= 1 || IN6_IS_ADDR_MC_NODELOCAL(&ip6->ip6_dst) || 1059 IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst)) 1060 return 0; 1061 ip6->ip6_hlim--; 1062 1063 /* 1064 * Source address check: do not forward packets with unspecified 1065 * source. It was discussed in July 2000, on ipngwg mailing list. 1066 * This is rather more serious than unicast cases, because some 1067 * MLD packets can be sent with the unspecified source address 1068 * (although such packets must normally set the hop limit field to 1). 1069 */ 1070 if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) { 1071 IP6_STATINC(IP6_STAT_CANTFORWARD); 1072 if (ip6_log_time + ip6_log_interval < time_second) { 1073 ip6_log_time = time_second; 1074 log(LOG_DEBUG, 1075 "cannot forward " 1076 "from %s to %s nxt %d received on %s\n", 1077 ip6_sprintf(&ip6->ip6_src), 1078 ip6_sprintf(&ip6->ip6_dst), 1079 ip6->ip6_nxt, 1080 m->m_pkthdr.rcvif ? 1081 if_name(m->m_pkthdr.rcvif) : "?"); 1082 } 1083 return 0; 1084 } 1085 1086 /* 1087 * Determine forwarding mifs from the forwarding cache table 1088 */ 1089 s = splsoftnet(); 1090 MF6CFIND(ip6->ip6_src, ip6->ip6_dst, rt); 1091 1092 /* Entry exists, so forward if necessary */ 1093 if (rt) { 1094 splx(s); 1095 return (ip6_mdq(m, ifp, rt)); 1096 } else { 1097 /* 1098 * If we don't have a route for packet's origin, 1099 * Make a copy of the packet & 1100 * send message to routing daemon 1101 */ 1102 1103 struct mbuf *mb0; 1104 struct rtdetq *rte; 1105 u_long hash; 1106 /* int i, npkts;*/ 1107 #ifdef UPCALL_TIMING 1108 struct timeval tp; 1109 1110 GET_TIME(tp); 1111 #endif /* UPCALL_TIMING */ 1112 1113 mrt6stat.mrt6s_no_route++; 1114 #ifdef MRT6DEBUG 1115 if (mrt6debug & (DEBUG_FORWARD | DEBUG_MFC)) 1116 log(LOG_DEBUG, "ip6_mforward: no rte s %s g %s\n", 1117 ip6_sprintf(&ip6->ip6_src), 1118 ip6_sprintf(&ip6->ip6_dst)); 1119 #endif 1120 1121 /* 1122 * Allocate mbufs early so that we don't do extra work if we 1123 * are just going to fail anyway. 1124 */ 1125 rte = (struct rtdetq *)malloc(sizeof(*rte), M_MRTABLE, 1126 M_NOWAIT); 1127 if (rte == NULL) { 1128 splx(s); 1129 return ENOBUFS; 1130 } 1131 mb0 = m_copy(m, 0, M_COPYALL); 1132 /* 1133 * Pullup packet header if needed before storing it, 1134 * as other references may modify it in the meantime. 1135 */ 1136 if (mb0 && 1137 (M_READONLY(mb0) || mb0->m_len < sizeof(struct ip6_hdr))) 1138 mb0 = m_pullup(mb0, sizeof(struct ip6_hdr)); 1139 if (mb0 == NULL) { 1140 free(rte, M_MRTABLE); 1141 splx(s); 1142 return ENOBUFS; 1143 } 1144 1145 /* is there an upcall waiting for this packet? */ 1146 hash = MF6CHASH(ip6->ip6_src, ip6->ip6_dst); 1147 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 1148 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, 1149 &rt->mf6c_origin.sin6_addr) && 1150 IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, 1151 &rt->mf6c_mcastgrp.sin6_addr) && 1152 (rt->mf6c_stall != NULL)) 1153 break; 1154 } 1155 1156 if (rt == NULL) { 1157 struct mrt6msg *im; 1158 struct omrt6msg *oim; 1159 1160 /* no upcall, so make a new entry */ 1161 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE, 1162 M_NOWAIT); 1163 if (rt == NULL) { 1164 free(rte, M_MRTABLE); 1165 m_freem(mb0); 1166 splx(s); 1167 return ENOBUFS; 1168 } 1169 /* 1170 * Make a copy of the header to send to the user 1171 * level process 1172 */ 1173 mm = m_copy(mb0, 0, sizeof(struct ip6_hdr)); 1174 1175 if (mm == NULL) { 1176 free(rte, M_MRTABLE); 1177 m_freem(mb0); 1178 free(rt, M_MRTABLE); 1179 splx(s); 1180 return ENOBUFS; 1181 } 1182 1183 /* 1184 * Send message to routing daemon 1185 */ 1186 sockaddr_in6_init(&sin6, &ip6->ip6_src, 0, 0, 0); 1187 1188 im = NULL; 1189 oim = NULL; 1190 switch (ip6_mrouter_ver) { 1191 case MRT6_OINIT: 1192 oim = mtod(mm, struct omrt6msg *); 1193 oim->im6_msgtype = MRT6MSG_NOCACHE; 1194 oim->im6_mbz = 0; 1195 break; 1196 case MRT6_INIT: 1197 im = mtod(mm, struct mrt6msg *); 1198 im->im6_msgtype = MRT6MSG_NOCACHE; 1199 im->im6_mbz = 0; 1200 break; 1201 default: 1202 free(rte, M_MRTABLE); 1203 m_freem(mb0); 1204 free(rt, M_MRTABLE); 1205 splx(s); 1206 return EINVAL; 1207 } 1208 1209 #ifdef MRT6DEBUG 1210 if (mrt6debug & DEBUG_FORWARD) 1211 log(LOG_DEBUG, 1212 "getting the iif info in the kernel\n"); 1213 #endif 1214 1215 for (mifp = mif6table, mifi = 0; 1216 mifi < nummifs && mifp->m6_ifp != ifp; 1217 mifp++, mifi++) 1218 ; 1219 1220 switch (ip6_mrouter_ver) { 1221 case MRT6_OINIT: 1222 oim->im6_mif = mifi; 1223 break; 1224 case MRT6_INIT: 1225 im->im6_mif = mifi; 1226 break; 1227 } 1228 1229 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1230 log(LOG_WARNING, "ip6_mforward: ip6_mrouter " 1231 "socket queue full\n"); 1232 mrt6stat.mrt6s_upq_sockfull++; 1233 free(rte, M_MRTABLE); 1234 m_freem(mb0); 1235 free(rt, M_MRTABLE); 1236 splx(s); 1237 return ENOBUFS; 1238 } 1239 1240 mrt6stat.mrt6s_upcalls++; 1241 1242 /* insert new entry at head of hash chain */ 1243 bzero(rt, sizeof(*rt)); 1244 sockaddr_in6_init(&rt->mf6c_origin, &ip6->ip6_src, 1245 0, 0, 0); 1246 sockaddr_in6_init(&rt->mf6c_mcastgrp, &ip6->ip6_dst, 1247 0, 0, 0); 1248 rt->mf6c_expire = UPCALL_EXPIRE; 1249 n6expire[hash]++; 1250 rt->mf6c_parent = MF6C_INCOMPLETE_PARENT; 1251 1252 /* link into table */ 1253 rt->mf6c_next = mf6ctable[hash]; 1254 mf6ctable[hash] = rt; 1255 /* Add this entry to the end of the queue */ 1256 rt->mf6c_stall = rte; 1257 } else { 1258 /* determine if q has overflowed */ 1259 struct rtdetq **p; 1260 int npkts = 0; 1261 1262 for (p = &rt->mf6c_stall; *p != NULL; p = &(*p)->next) 1263 if (++npkts > MAX_UPQ6) { 1264 mrt6stat.mrt6s_upq_ovflw++; 1265 free(rte, M_MRTABLE); 1266 m_freem(mb0); 1267 splx(s); 1268 return 0; 1269 } 1270 1271 /* Add this entry to the end of the queue */ 1272 *p = rte; 1273 } 1274 1275 rte->next = NULL; 1276 rte->m = mb0; 1277 rte->ifp = ifp; 1278 #ifdef UPCALL_TIMING 1279 rte->t = tp; 1280 #endif /* UPCALL_TIMING */ 1281 1282 splx(s); 1283 1284 return 0; 1285 } 1286 } 1287 1288 /* 1289 * Clean up cache entries if upcalls are not serviced 1290 * Call from the Slow Timeout mechanism, every 0.25 seconds. 1291 */ 1292 static void 1293 expire_upcalls(void *unused) 1294 { 1295 struct rtdetq *rte; 1296 struct mf6c *mfc, **nptr; 1297 int i; 1298 1299 mutex_enter(softnet_lock); 1300 KERNEL_LOCK(1, NULL); 1301 1302 for (i = 0; i < MF6CTBLSIZ; i++) { 1303 if (n6expire[i] == 0) 1304 continue; 1305 nptr = &mf6ctable[i]; 1306 while ((mfc = *nptr) != NULL) { 1307 rte = mfc->mf6c_stall; 1308 /* 1309 * Skip real cache entries 1310 * Make sure it wasn't marked to not expire (shouldn't happen) 1311 * If it expires now 1312 */ 1313 if (rte != NULL && 1314 mfc->mf6c_expire != 0 && 1315 --mfc->mf6c_expire == 0) { 1316 #ifdef MRT6DEBUG 1317 if (mrt6debug & DEBUG_EXPIRE) 1318 log(LOG_DEBUG, "expire_upcalls: expiring (%s %s)\n", 1319 ip6_sprintf(&mfc->mf6c_origin.sin6_addr), 1320 ip6_sprintf(&mfc->mf6c_mcastgrp.sin6_addr)); 1321 #endif 1322 /* 1323 * drop all the packets 1324 * free the mbuf with the pkt, if, timing info 1325 */ 1326 do { 1327 struct rtdetq *n = rte->next; 1328 m_freem(rte->m); 1329 free(rte, M_MRTABLE); 1330 rte = n; 1331 } while (rte != NULL); 1332 mrt6stat.mrt6s_cache_cleanups++; 1333 n6expire[i]--; 1334 1335 *nptr = mfc->mf6c_next; 1336 free(mfc, M_MRTABLE); 1337 } else { 1338 nptr = &mfc->mf6c_next; 1339 } 1340 } 1341 } 1342 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 1343 expire_upcalls, NULL); 1344 1345 KERNEL_UNLOCK_ONE(NULL); 1346 mutex_exit(softnet_lock); 1347 } 1348 1349 /* 1350 * Packet forwarding routine once entry in the cache is made 1351 */ 1352 static int 1353 ip6_mdq(struct mbuf *m, struct ifnet *ifp, struct mf6c *rt) 1354 { 1355 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 1356 mifi_t mifi, iif; 1357 struct mif6 *mifp; 1358 int plen = m->m_pkthdr.len; 1359 struct in6_addr src0, dst0; /* copies for local work */ 1360 u_int32_t iszone, idzone, oszone, odzone; 1361 int error = 0; 1362 1363 /* 1364 * Macro to send packet on mif. Since RSVP packets don't get counted on 1365 * input, they shouldn't get counted on output, so statistics keeping is 1366 * separate. 1367 */ 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 * Don't forward if it didn't arrive from the parent mif 1378 * for its origin. 1379 */ 1380 mifi = rt->mf6c_parent; 1381 if ((mifi >= nummifs) || (mif6table[mifi].m6_ifp != ifp)) { 1382 /* came in the wrong interface */ 1383 #ifdef MRT6DEBUG 1384 if (mrt6debug & DEBUG_FORWARD) 1385 log(LOG_DEBUG, 1386 "wrong if: ifid %d mifi %d mififid %x\n", 1387 ifp->if_index, mifi, 1388 mif6table[mifi].m6_ifp ? 1389 mif6table[mifi].m6_ifp->if_index : -1); 1390 #endif 1391 mrt6stat.mrt6s_wrong_if++; 1392 rt->mf6c_wrong_if++; 1393 /* 1394 * If we are doing PIM processing, and we are forwarding 1395 * packets on this interface, send a message to the 1396 * routing daemon. 1397 */ 1398 /* have to make sure this is a valid mif */ 1399 if (mifi < nummifs && mif6table[mifi].m6_ifp) 1400 if (pim6 && (m->m_flags & M_LOOP) == 0) { 1401 /* 1402 * Check the M_LOOP flag to avoid an 1403 * unnecessary PIM assert. 1404 * XXX: M_LOOP is an ad-hoc hack... 1405 */ 1406 struct sockaddr_in6 sin6; 1407 1408 struct mbuf *mm; 1409 struct mrt6msg *im; 1410 struct omrt6msg *oim; 1411 1412 mm = m_copy(m, 0, sizeof(struct ip6_hdr)); 1413 if (mm && 1414 (M_READONLY(mm) || 1415 mm->m_len < sizeof(struct ip6_hdr))) 1416 mm = m_pullup(mm, sizeof(struct ip6_hdr)); 1417 if (mm == NULL) 1418 return ENOBUFS; 1419 1420 oim = NULL; 1421 im = NULL; 1422 switch (ip6_mrouter_ver) { 1423 case MRT6_OINIT: 1424 oim = mtod(mm, struct omrt6msg *); 1425 oim->im6_msgtype = MRT6MSG_WRONGMIF; 1426 oim->im6_mbz = 0; 1427 break; 1428 case MRT6_INIT: 1429 im = mtod(mm, struct mrt6msg *); 1430 im->im6_msgtype = MRT6MSG_WRONGMIF; 1431 im->im6_mbz = 0; 1432 break; 1433 default: 1434 m_freem(mm); 1435 return EINVAL; 1436 } 1437 1438 for (mifp = mif6table, iif = 0; 1439 iif < nummifs && mifp && 1440 mifp->m6_ifp != ifp; 1441 mifp++, iif++) 1442 ; 1443 1444 bzero(&sin6, sizeof(sin6)); 1445 sin6.sin6_len = sizeof(sin6); 1446 sin6.sin6_family = AF_INET6; 1447 switch (ip6_mrouter_ver) { 1448 case MRT6_OINIT: 1449 oim->im6_mif = iif; 1450 sin6.sin6_addr = oim->im6_src; 1451 break; 1452 case MRT6_INIT: 1453 im->im6_mif = iif; 1454 sin6.sin6_addr = im->im6_src; 1455 break; 1456 } 1457 1458 mrt6stat.mrt6s_upcalls++; 1459 1460 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1461 #ifdef MRT6DEBUG 1462 if (mrt6debug) 1463 log(LOG_WARNING, "mdq, ip6_mrouter socket queue full\n"); 1464 #endif 1465 ++mrt6stat.mrt6s_upq_sockfull; 1466 return ENOBUFS; 1467 } /* if socket Q full */ 1468 } /* if PIM */ 1469 return 0; 1470 } /* if wrong iif */ 1471 1472 /* If I sourced this packet, it counts as output, else it was input. */ 1473 if (m->m_pkthdr.rcvif == NULL) { 1474 /* XXX: is rcvif really NULL when output?? */ 1475 mif6table[mifi].m6_pkt_out++; 1476 mif6table[mifi].m6_bytes_out += plen; 1477 } else { 1478 mif6table[mifi].m6_pkt_in++; 1479 mif6table[mifi].m6_bytes_in += plen; 1480 } 1481 rt->mf6c_pkt_cnt++; 1482 rt->mf6c_byte_cnt += plen; 1483 1484 /* 1485 * For each mif, forward a copy of the packet if there are group 1486 * members downstream on the interface. 1487 */ 1488 src0 = ip6->ip6_src; 1489 dst0 = ip6->ip6_dst; 1490 if ((error = in6_setscope(&src0, ifp, &iszone)) != 0 || 1491 (error = in6_setscope(&dst0, ifp, &idzone)) != 0) { 1492 IP6_STATINC(IP6_STAT_BADSCOPE); 1493 return (error); 1494 } 1495 for (mifp = mif6table, mifi = 0; mifi < nummifs; mifp++, mifi++) 1496 if (IF_ISSET(mifi, &rt->mf6c_ifset)) { 1497 if (mif6table[mifi].m6_ifp == NULL) 1498 continue; 1499 /* 1500 * check if the outgoing packet is going to break 1501 * a scope boundary. 1502 * XXX: For packets through PIM register tunnel 1503 * interface, we believe the routing daemon. 1504 */ 1505 if ((mif6table[rt->mf6c_parent].m6_flags & 1506 MIFF_REGISTER) == 0 && 1507 (mif6table[mifi].m6_flags & MIFF_REGISTER) == 0) { 1508 if (in6_setscope(&src0, mif6table[mifi].m6_ifp, 1509 &oszone) || 1510 in6_setscope(&dst0, mif6table[mifi].m6_ifp, 1511 &odzone) || 1512 iszone != oszone || idzone != odzone) { 1513 IP6_STATINC(IP6_STAT_BADSCOPE); 1514 continue; 1515 } 1516 } 1517 1518 mifp->m6_pkt_out++; 1519 mifp->m6_bytes_out += plen; 1520 MC6_SEND(ip6, mifp, m); 1521 } 1522 return 0; 1523 } 1524 1525 static void 1526 phyint_send(struct ip6_hdr *ip6, struct mif6 *mifp, struct mbuf *m) 1527 { 1528 struct mbuf *mb_copy; 1529 struct ifnet *ifp = mifp->m6_ifp; 1530 int error = 0; 1531 int s; 1532 static struct route ro; 1533 struct in6_multi *in6m; 1534 struct sockaddr_in6 dst6; 1535 u_long linkmtu; 1536 1537 s = splsoftnet(); 1538 /* 1539 * Make a new reference to the packet; make sure that 1540 * the IPv6 header is actually copied, not just referenced, 1541 * so that ip6_output() only scribbles on the copy. 1542 */ 1543 mb_copy = m_copy(m, 0, M_COPYALL); 1544 if (mb_copy && 1545 (M_READONLY(mb_copy) || mb_copy->m_len < sizeof(struct ip6_hdr))) 1546 mb_copy = m_pullup(mb_copy, sizeof(struct ip6_hdr)); 1547 if (mb_copy == NULL) { 1548 splx(s); 1549 return; 1550 } 1551 /* set MCAST flag to the outgoing packet */ 1552 mb_copy->m_flags |= M_MCAST; 1553 1554 /* 1555 * If we sourced the packet, call ip6_output since we may divide 1556 * the packet into fragments when the packet is too big for the 1557 * outgoing interface. 1558 * Otherwise, we can simply send the packet to the interface 1559 * sending queue. 1560 */ 1561 if (m->m_pkthdr.rcvif == NULL) { 1562 struct ip6_moptions im6o; 1563 1564 im6o.im6o_multicast_ifp = ifp; 1565 /* XXX: ip6_output will override ip6->ip6_hlim */ 1566 im6o.im6o_multicast_hlim = ip6->ip6_hlim; 1567 im6o.im6o_multicast_loop = 1; 1568 error = ip6_output(mb_copy, NULL, &ro, IPV6_FORWARDING, 1569 &im6o, NULL, NULL); 1570 1571 #ifdef MRT6DEBUG 1572 if (mrt6debug & DEBUG_XMIT) 1573 log(LOG_DEBUG, "phyint_send on mif %d err %d\n", 1574 mifp - mif6table, error); 1575 #endif 1576 splx(s); 1577 return; 1578 } 1579 1580 /* 1581 * If we belong to the destination multicast group 1582 * on the outgoing interface, loop back a copy. 1583 */ 1584 /* 1585 * Does not have to check source info, as it's alreay covered by 1586 * ip6_input 1587 */ 1588 sockaddr_in6_init(&dst6, &ip6->ip6_dst, 0, 0, 0); 1589 1590 IN6_LOOKUP_MULTI(ip6->ip6_dst, ifp, in6m); 1591 if (in6m != NULL) { 1592 ip6_mloopback(ifp, m, 1593 satocsin6(rtcache_getdst(&ro))); 1594 } 1595 1596 /* 1597 * Put the packet into the sending queue of the outgoing interface 1598 * if it would fit in the MTU of the interface. 1599 */ 1600 linkmtu = IN6_LINKMTU(ifp); 1601 if (mb_copy->m_pkthdr.len <= linkmtu || linkmtu < IPV6_MMTU) { 1602 /* 1603 * We could call if_output directly here, but we use 1604 * nd6_output on purpose to see if IPv6 operation is allowed 1605 * on the interface. 1606 */ 1607 error = nd6_output(ifp, ifp, mb_copy, &dst6, NULL); 1608 #ifdef MRT6DEBUG 1609 if (mrt6debug & DEBUG_XMIT) 1610 log(LOG_DEBUG, "phyint_send on mif %d err %d\n", 1611 mifp - mif6table, error); 1612 #endif 1613 } else { 1614 /* 1615 * pMTU discovery is intentionally disabled by default, since 1616 * various router may notify pMTU in multicast, which can be 1617 * a DDoS to a router 1618 */ 1619 if (ip6_mcast_pmtu) 1620 icmp6_error(mb_copy, ICMP6_PACKET_TOO_BIG, 0, linkmtu); 1621 else { 1622 #ifdef MRT6DEBUG 1623 if (mrt6debug & DEBUG_XMIT) 1624 log(LOG_DEBUG, 1625 "phyint_send: packet too big on %s o %s g %s" 1626 " size %d(discarded)\n", 1627 if_name(ifp), 1628 ip6_sprintf(&ip6->ip6_src), 1629 ip6_sprintf(&ip6->ip6_dst), 1630 mb_copy->m_pkthdr.len); 1631 #endif /* MRT6DEBUG */ 1632 m_freem(mb_copy); /* simply discard the packet */ 1633 } 1634 } 1635 1636 splx(s); 1637 } 1638 1639 static int 1640 register_send(struct ip6_hdr *ip6, struct mif6 *mif, struct mbuf *m) 1641 { 1642 struct mbuf *mm; 1643 int i, len = m->m_pkthdr.len; 1644 struct sockaddr_in6 sin6; 1645 struct mrt6msg *im6; 1646 1647 #ifdef MRT6DEBUG 1648 if (mrt6debug) 1649 log(LOG_DEBUG, "** IPv6 register_send **\n src %s dst %s\n", 1650 ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst)); 1651 #endif 1652 PIM6_STATINC(PIM6_STAT_SND_REGISTERS); 1653 1654 /* Make a copy of the packet to send to the user level process */ 1655 MGETHDR(mm, M_DONTWAIT, MT_HEADER); 1656 if (mm == NULL) 1657 return ENOBUFS; 1658 mm->m_data += max_linkhdr; 1659 mm->m_len = sizeof(struct ip6_hdr); 1660 1661 if ((mm->m_next = m_copy(m, 0, M_COPYALL)) == NULL) { 1662 m_freem(mm); 1663 return ENOBUFS; 1664 } 1665 i = MHLEN - M_LEADINGSPACE(mm); 1666 if (i > len) 1667 i = len; 1668 mm = m_pullup(mm, i); 1669 if (mm == NULL) 1670 return ENOBUFS; 1671 /* TODO: check it! */ 1672 mm->m_pkthdr.len = len + sizeof(struct ip6_hdr); 1673 1674 /* 1675 * Send message to routing daemon 1676 */ 1677 sockaddr_in6_init(&sin6, &ip6->ip6_src, 0, 0, 0); 1678 1679 im6 = mtod(mm, struct mrt6msg *); 1680 im6->im6_msgtype = MRT6MSG_WHOLEPKT; 1681 im6->im6_mbz = 0; 1682 1683 im6->im6_mif = mif - mif6table; 1684 1685 /* iif info is not given for reg. encap.n */ 1686 mrt6stat.mrt6s_upcalls++; 1687 1688 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1689 #ifdef MRT6DEBUG 1690 if (mrt6debug) 1691 log(LOG_WARNING, 1692 "register_send: ip6_mrouter socket queue full\n"); 1693 #endif 1694 ++mrt6stat.mrt6s_upq_sockfull; 1695 return ENOBUFS; 1696 } 1697 return 0; 1698 } 1699 1700 /* 1701 * PIM sparse mode hook 1702 * Receives the pim control messages, and passes them up to the listening 1703 * socket, using rip6_input. 1704 * The only message processed is the REGISTER pim message; the pim header 1705 * is stripped off, and the inner packet is passed to register_mforward. 1706 */ 1707 int 1708 pim6_input(struct mbuf **mp, int *offp, int proto) 1709 { 1710 struct pim *pim; /* pointer to a pim struct */ 1711 struct ip6_hdr *ip6; 1712 int pimlen; 1713 struct mbuf *m = *mp; 1714 int minlen; 1715 int off = *offp; 1716 1717 PIM6_STATINC(PIM6_STAT_RCV_TOTAL); 1718 1719 ip6 = mtod(m, struct ip6_hdr *); 1720 pimlen = m->m_pkthdr.len - *offp; 1721 1722 /* 1723 * Validate lengths 1724 */ 1725 if (pimlen < PIM_MINLEN) { 1726 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1727 #ifdef MRT6DEBUG 1728 if (mrt6debug & DEBUG_PIM) 1729 log(LOG_DEBUG,"pim6_input: PIM packet too short\n"); 1730 #endif 1731 m_freem(m); 1732 return (IPPROTO_DONE); 1733 } 1734 1735 /* 1736 * if the packet is at least as big as a REGISTER, go ahead 1737 * and grab the PIM REGISTER header size, to avoid another 1738 * possible m_pullup() later. 1739 * 1740 * PIM_MINLEN == pimhdr + u_int32 == 8 1741 * PIM6_REG_MINLEN == pimhdr + reghdr + eip6hdr == 4 + 4 + 40 1742 */ 1743 minlen = (pimlen >= PIM6_REG_MINLEN) ? PIM6_REG_MINLEN : PIM_MINLEN; 1744 1745 /* 1746 * Make sure that the IP6 and PIM headers in contiguous memory, and 1747 * possibly the PIM REGISTER header 1748 */ 1749 IP6_EXTHDR_GET(pim, struct pim *, m, off, minlen); 1750 if (pim == NULL) { 1751 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1752 return IPPROTO_DONE; 1753 } 1754 1755 /* PIM version check */ 1756 if (pim->pim_ver != PIM_VERSION) { 1757 PIM6_STATINC(PIM6_STAT_RCV_BADVERSION); 1758 #ifdef MRT6DEBUG 1759 log(LOG_ERR, 1760 "pim6_input: incorrect version %d, expecting %d\n", 1761 pim->pim_ver, PIM_VERSION); 1762 #endif 1763 m_freem(m); 1764 return (IPPROTO_DONE); 1765 } 1766 1767 #define PIM6_CHECKSUM 1768 #ifdef PIM6_CHECKSUM 1769 { 1770 int cksumlen; 1771 1772 /* 1773 * Validate checksum. 1774 * If PIM REGISTER, exclude the data packet 1775 */ 1776 if (pim->pim_type == PIM_REGISTER) 1777 cksumlen = PIM_MINLEN; 1778 else 1779 cksumlen = pimlen; 1780 1781 if (in6_cksum(m, IPPROTO_PIM, off, cksumlen)) { 1782 PIM6_STATINC(PIM6_STAT_RCV_BADSUM); 1783 #ifdef MRT6DEBUG 1784 if (mrt6debug & DEBUG_PIM) 1785 log(LOG_DEBUG, 1786 "pim6_input: invalid checksum\n"); 1787 #endif 1788 m_freem(m); 1789 return (IPPROTO_DONE); 1790 } 1791 } 1792 #endif /* PIM_CHECKSUM */ 1793 1794 if (pim->pim_type == PIM_REGISTER) { 1795 /* 1796 * since this is a REGISTER, we'll make a copy of the register 1797 * headers ip6+pim+u_int32_t+encap_ip6, to be passed up to the 1798 * routing daemon. 1799 */ 1800 static const struct sockaddr_in6 dst = { 1801 .sin6_len = sizeof(dst), 1802 .sin6_family = AF_INET6, 1803 }; 1804 1805 struct mbuf *mcp; 1806 struct ip6_hdr *eip6; 1807 u_int32_t *reghdr; 1808 1809 PIM6_STATINC(PIM6_STAT_RCV_REGISTERS); 1810 1811 if ((reg_mif_num >= nummifs) || (reg_mif_num == (mifi_t) -1)) { 1812 #ifdef MRT6DEBUG 1813 if (mrt6debug & DEBUG_PIM) 1814 log(LOG_DEBUG, 1815 "pim6_input: register mif not set: %d\n", 1816 reg_mif_num); 1817 #endif 1818 m_freem(m); 1819 return (IPPROTO_DONE); 1820 } 1821 1822 reghdr = (u_int32_t *)(pim + 1); 1823 1824 if ((ntohl(*reghdr) & PIM_NULL_REGISTER)) 1825 goto pim6_input_to_daemon; 1826 1827 /* 1828 * Validate length 1829 */ 1830 if (pimlen < PIM6_REG_MINLEN) { 1831 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1832 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1833 #ifdef MRT6DEBUG 1834 log(LOG_ERR, 1835 "pim6_input: register packet size too " 1836 "small %d from %s\n", 1837 pimlen, ip6_sprintf(&ip6->ip6_src)); 1838 #endif 1839 m_freem(m); 1840 return (IPPROTO_DONE); 1841 } 1842 1843 eip6 = (struct ip6_hdr *) (reghdr + 1); 1844 #ifdef MRT6DEBUG 1845 if (mrt6debug & DEBUG_PIM) 1846 log(LOG_DEBUG, 1847 "pim6_input[register], eip6: %s -> %s, " 1848 "eip6 plen %d\n", 1849 ip6_sprintf(&eip6->ip6_src), 1850 ip6_sprintf(&eip6->ip6_dst), 1851 ntohs(eip6->ip6_plen)); 1852 #endif 1853 1854 /* verify the version number of the inner packet */ 1855 if ((eip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) { 1856 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1857 #ifdef MRT6DEBUG 1858 log(LOG_DEBUG, "pim6_input: invalid IP version (%d) " 1859 "of the inner packet\n", 1860 (eip6->ip6_vfc & IPV6_VERSION)); 1861 #endif 1862 m_freem(m); 1863 return (IPPROTO_NONE); 1864 } 1865 1866 /* verify the inner packet is destined to a mcast group */ 1867 if (!IN6_IS_ADDR_MULTICAST(&eip6->ip6_dst)) { 1868 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1869 #ifdef MRT6DEBUG 1870 if (mrt6debug & DEBUG_PIM) 1871 log(LOG_DEBUG, 1872 "pim6_input: inner packet of register " 1873 "is not multicast %s\n", 1874 ip6_sprintf(&eip6->ip6_dst)); 1875 #endif 1876 m_freem(m); 1877 return (IPPROTO_DONE); 1878 } 1879 1880 /* 1881 * make a copy of the whole header to pass to the daemon later. 1882 */ 1883 mcp = m_copy(m, 0, off + PIM6_REG_MINLEN); 1884 if (mcp == NULL) { 1885 #ifdef MRT6DEBUG 1886 log(LOG_ERR, 1887 "pim6_input: pim register: " 1888 "could not copy register head\n"); 1889 #endif 1890 m_freem(m); 1891 return (IPPROTO_DONE); 1892 } 1893 1894 /* 1895 * forward the inner ip6 packet; point m_data at the inner ip6. 1896 */ 1897 m_adj(m, off + PIM_MINLEN); 1898 #ifdef MRT6DEBUG 1899 if (mrt6debug & DEBUG_PIM) { 1900 log(LOG_DEBUG, 1901 "pim6_input: forwarding decapsulated register: " 1902 "src %s, dst %s, mif %d\n", 1903 ip6_sprintf(&eip6->ip6_src), 1904 ip6_sprintf(&eip6->ip6_dst), 1905 reg_mif_num); 1906 } 1907 #endif 1908 1909 looutput(mif6table[reg_mif_num].m6_ifp, m, 1910 (struct sockaddr *)__UNCONST(&dst), 1911 (struct rtentry *) NULL); 1912 1913 /* prepare the register head to send to the mrouting daemon */ 1914 m = mcp; 1915 } 1916 1917 /* 1918 * Pass the PIM message up to the daemon; if it is a register message 1919 * pass the 'head' only up to the daemon. This includes the 1920 * encapsulator ip6 header, pim header, register header and the 1921 * encapsulated ip6 header. 1922 */ 1923 pim6_input_to_daemon: 1924 rip6_input(&m, offp, proto); 1925 return (IPPROTO_DONE); 1926 } 1927 1928 static int 1929 sysctl_net_inet6_pim6_stats(SYSCTLFN_ARGS) 1930 { 1931 1932 return (NETSTAT_SYSCTL(pim6stat_percpu, PIM6_NSTATS)); 1933 } 1934 1935 SYSCTL_SETUP(sysctl_net_inet6_pim6_setup, "sysctl net.inet6.pim6 subtree setup") 1936 { 1937 sysctl_createv(clog, 0, NULL, NULL, 1938 CTLFLAG_PERMANENT, 1939 CTLTYPE_NODE, "net", NULL, 1940 NULL, 0, NULL, 0, 1941 CTL_NET, CTL_EOL); 1942 sysctl_createv(clog, 0, NULL, NULL, 1943 CTLFLAG_PERMANENT, 1944 CTLTYPE_NODE, "inet6", NULL, 1945 NULL, 0, NULL, 0, 1946 CTL_NET, PF_INET6, CTL_EOL); 1947 sysctl_createv(clog, 0, NULL, NULL, 1948 CTLFLAG_PERMANENT, 1949 CTLTYPE_NODE, "pim6", 1950 SYSCTL_DESCR("PIMv6 settings"), 1951 NULL, 0, NULL, 0, 1952 CTL_NET, PF_INET6, IPPROTO_PIM, CTL_EOL); 1953 1954 sysctl_createv(clog, 0, NULL, NULL, 1955 CTLFLAG_PERMANENT, 1956 CTLTYPE_STRUCT, "stats", 1957 SYSCTL_DESCR("PIMv6 statistics"), 1958 sysctl_net_inet6_pim6_stats, 0, NULL, 0, 1959 CTL_NET, PF_INET6, IPPROTO_PIM, PIM6CTL_STATS, 1960 CTL_EOL); 1961 } 1962
Indexes created Thu Sep 25 14:09:45 GMT 2025