ip6_mroute.c revision 1.92
1 /* $NetBSD: ip6_mroute.c,v 1.92 2008/04/24 11:38:38 ad 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 1.92 2008/04/24 11:38:38 ad 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, 541 (void *)&ifr); 542 } 543 } 544 } 545 #ifdef notyet 546 bzero((void *)qtable, sizeof(qtable)); 547 bzero((void *)tbftable, sizeof(tbftable)); 548 #endif 549 bzero((void *)mif6table, sizeof(mif6table)); 550 nummifs = 0; 551 552 pim6 = 0; /* used to stub out/in pim specific code */ 553 554 callout_stop(&expire_upcalls_ch); 555 556 /* 557 * Free all multicast forwarding cache entries. 558 */ 559 for (i = 0; i < MF6CTBLSIZ; i++) { 560 rt = mf6ctable[i]; 561 while (rt) { 562 struct mf6c *frt; 563 564 for (rte = rt->mf6c_stall; rte != NULL; ) { 565 struct rtdetq *n = rte->next; 566 567 m_free(rte->m); 568 free(rte, M_MRTABLE); 569 rte = n; 570 } 571 frt = rt; 572 rt = rt->mf6c_next; 573 free(frt, M_MRTABLE); 574 } 575 } 576 577 bzero((void *)mf6ctable, sizeof(mf6ctable)); 578 579 /* 580 * Reset register interface 581 */ 582 if (reg_mif_num != (mifi_t)-1) { 583 if_detach(&multicast_register_if6); 584 reg_mif_num = (mifi_t)-1; 585 } 586 587 ip6_mrouter = NULL; 588 ip6_mrouter_ver = 0; 589 590 splx(s); 591 592 #ifdef MRT6DEBUG 593 if (mrt6debug) 594 log(LOG_DEBUG, "ip6_mrouter_done\n"); 595 #endif 596 597 return 0; 598 } 599 600 void 601 ip6_mrouter_detach(struct ifnet *ifp) 602 { 603 struct rtdetq *rte; 604 struct mf6c *mfc; 605 mifi_t mifi; 606 int i; 607 608 if (ip6_mrouter == NULL) 609 return; 610 611 /* 612 * Delete a mif which points to ifp. 613 */ 614 for (mifi = 0; mifi < nummifs; mifi++) 615 if (mif6table[mifi].m6_ifp == ifp) 616 del_m6if(&mifi); 617 618 /* 619 * Clear rte->ifp of cache entries received on ifp. 620 */ 621 for (i = 0; i < MF6CTBLSIZ; i++) { 622 if (n6expire[i] == 0) 623 continue; 624 625 for (mfc = mf6ctable[i]; mfc != NULL; mfc = mfc->mf6c_next) { 626 for (rte = mfc->mf6c_stall; rte != NULL; rte = rte->next) { 627 if (rte->ifp == ifp) 628 rte->ifp = NULL; 629 } 630 } 631 } 632 } 633 634 635 /* 636 * Add a mif to the mif table 637 */ 638 static int 639 add_m6if(struct mif6ctl *mifcp) 640 { 641 struct mif6 *mifp; 642 struct ifnet *ifp; 643 struct in6_ifreq ifr; 644 int error, s; 645 #ifdef notyet 646 struct tbf *m_tbf = tbftable + mifcp->mif6c_mifi; 647 #endif 648 649 if (mifcp->mif6c_mifi >= MAXMIFS) 650 return EINVAL; 651 mifp = mif6table + mifcp->mif6c_mifi; 652 if (mifp->m6_ifp) 653 return EADDRINUSE; /* XXX: is it appropriate? */ 654 if (mifcp->mif6c_pifi == 0 || mifcp->mif6c_pifi >= if_indexlim) 655 return ENXIO; 656 /* 657 * XXX: some OSes can remove ifp and clear ifindex2ifnet[id] 658 * even for id between 0 and if_index. 659 */ 660 if ((ifp = ifindex2ifnet[mifcp->mif6c_pifi]) == NULL) 661 return ENXIO; 662 663 if (mifcp->mif6c_flags & MIFF_REGISTER) { 664 ifp = &multicast_register_if6; 665 666 if (reg_mif_num == (mifi_t)-1) { 667 strlcpy(ifp->if_xname, "register_mif", 668 sizeof(ifp->if_xname)); 669 ifp->if_flags |= IFF_LOOPBACK; 670 ifp->if_index = mifcp->mif6c_mifi; 671 reg_mif_num = mifcp->mif6c_mifi; 672 if_attach(ifp); 673 } 674 675 } /* if REGISTER */ 676 else { 677 /* Make sure the interface supports multicast */ 678 if ((ifp->if_flags & IFF_MULTICAST) == 0) 679 return EOPNOTSUPP; 680 681 s = splsoftnet(); 682 /* 683 * Enable promiscuous reception of all IPv6 multicasts 684 * from the interface. 685 */ 686 ifr.ifr_addr.sin6_family = AF_INET6; 687 ifr.ifr_addr.sin6_addr = in6addr_any; 688 error = (*ifp->if_ioctl)(ifp, SIOCADDMULTI, (void *)&ifr); 689 splx(s); 690 if (error) 691 return error; 692 } 693 694 s = splsoftnet(); 695 mifp->m6_flags = mifcp->mif6c_flags; 696 mifp->m6_ifp = ifp; 697 #ifdef notyet 698 /* scaling up here allows division by 1024 in critical code */ 699 mifp->m6_rate_limit = mifcp->mif6c_rate_limit * 1024 / 1000; 700 #endif 701 /* initialize per mif pkt counters */ 702 mifp->m6_pkt_in = 0; 703 mifp->m6_pkt_out = 0; 704 mifp->m6_bytes_in = 0; 705 mifp->m6_bytes_out = 0; 706 splx(s); 707 708 /* Adjust nummifs up if the mifi is higher than nummifs */ 709 if (nummifs <= mifcp->mif6c_mifi) 710 nummifs = mifcp->mif6c_mifi + 1; 711 712 #ifdef MRT6DEBUG 713 if (mrt6debug) 714 log(LOG_DEBUG, 715 "add_mif #%d, phyint %s\n", 716 mifcp->mif6c_mifi, ifp->if_xname); 717 #endif 718 719 return 0; 720 } 721 722 /* 723 * Delete a mif from the mif table 724 */ 725 static int 726 del_m6if(mifi_t *mifip) 727 { 728 struct mif6 *mifp = mif6table + *mifip; 729 mifi_t mifi; 730 struct ifnet *ifp; 731 struct in6_ifreq ifr; 732 int s; 733 734 if (*mifip >= nummifs) 735 return EINVAL; 736 if (mifp->m6_ifp == NULL) 737 return EINVAL; 738 739 s = splsoftnet(); 740 741 if (!(mifp->m6_flags & MIFF_REGISTER)) { 742 /* 743 * XXX: what if there is yet IPv4 multicast daemon 744 * using the interface? 745 */ 746 ifp = mifp->m6_ifp; 747 748 ifr.ifr_addr.sin6_family = AF_INET6; 749 ifr.ifr_addr.sin6_addr = in6addr_any; 750 (*ifp->if_ioctl)(ifp, SIOCDELMULTI, (void *)&ifr); 751 } else { 752 if (reg_mif_num != (mifi_t)-1) { 753 if_detach(&multicast_register_if6); 754 reg_mif_num = (mifi_t)-1; 755 } 756 } 757 758 #ifdef notyet 759 bzero((void *)qtable[*mifip], sizeof(qtable[*mifip])); 760 bzero((void *)mifp->m6_tbf, sizeof(*(mifp->m6_tbf))); 761 #endif 762 bzero((void *)mifp, sizeof (*mifp)); 763 764 /* Adjust nummifs down */ 765 for (mifi = nummifs; mifi > 0; mifi--) 766 if (mif6table[mifi - 1].m6_ifp) 767 break; 768 nummifs = mifi; 769 770 splx(s); 771 772 #ifdef MRT6DEBUG 773 if (mrt6debug) 774 log(LOG_DEBUG, "del_m6if %d, nummifs %d\n", *mifip, nummifs); 775 #endif 776 777 return 0; 778 } 779 780 /* 781 * Add an mfc entry 782 */ 783 static int 784 add_m6fc(struct mf6cctl *mfccp) 785 { 786 struct mf6c *rt; 787 u_long hash; 788 struct rtdetq *rte; 789 u_short nstl; 790 int s; 791 792 MF6CFIND(mfccp->mf6cc_origin.sin6_addr, 793 mfccp->mf6cc_mcastgrp.sin6_addr, rt); 794 795 /* If an entry already exists, just update the fields */ 796 if (rt) { 797 #ifdef MRT6DEBUG 798 if (mrt6debug & DEBUG_MFC) 799 log(LOG_DEBUG,"add_m6fc update o %s g %s p %x\n", 800 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 801 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 802 mfccp->mf6cc_parent); 803 #endif 804 805 s = splsoftnet(); 806 rt->mf6c_parent = mfccp->mf6cc_parent; 807 rt->mf6c_ifset = mfccp->mf6cc_ifset; 808 splx(s); 809 return 0; 810 } 811 812 /* 813 * Find the entry for which the upcall was made and update 814 */ 815 s = splsoftnet(); 816 hash = MF6CHASH(mfccp->mf6cc_origin.sin6_addr, 817 mfccp->mf6cc_mcastgrp.sin6_addr); 818 for (rt = mf6ctable[hash], nstl = 0; rt; rt = rt->mf6c_next) { 819 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 820 &mfccp->mf6cc_origin.sin6_addr) && 821 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 822 &mfccp->mf6cc_mcastgrp.sin6_addr) && 823 (rt->mf6c_stall != NULL)) { 824 825 if (nstl++) 826 log(LOG_ERR, 827 "add_m6fc: %s o %s g %s p %x dbx %p\n", 828 "multiple kernel entries", 829 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 830 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 831 mfccp->mf6cc_parent, rt->mf6c_stall); 832 833 #ifdef MRT6DEBUG 834 if (mrt6debug & DEBUG_MFC) 835 log(LOG_DEBUG, 836 "add_m6fc o %s g %s p %x dbg %p\n", 837 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 838 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 839 mfccp->mf6cc_parent, rt->mf6c_stall); 840 #endif 841 842 rt->mf6c_origin = mfccp->mf6cc_origin; 843 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 844 rt->mf6c_parent = mfccp->mf6cc_parent; 845 rt->mf6c_ifset = mfccp->mf6cc_ifset; 846 /* initialize pkt counters per src-grp */ 847 rt->mf6c_pkt_cnt = 0; 848 rt->mf6c_byte_cnt = 0; 849 rt->mf6c_wrong_if = 0; 850 851 rt->mf6c_expire = 0; /* Don't clean this guy up */ 852 n6expire[hash]--; 853 854 /* free packets Qed at the end of this entry */ 855 for (rte = rt->mf6c_stall; rte != NULL; ) { 856 struct rtdetq *n = rte->next; 857 if (rte->ifp) { 858 ip6_mdq(rte->m, rte->ifp, rt); 859 } 860 m_freem(rte->m); 861 #ifdef UPCALL_TIMING 862 collate(&(rte->t)); 863 #endif /* UPCALL_TIMING */ 864 free(rte, M_MRTABLE); 865 rte = n; 866 } 867 rt->mf6c_stall = NULL; 868 } 869 } 870 871 /* 872 * It is possible that an entry is being inserted without an upcall 873 */ 874 if (nstl == 0) { 875 #ifdef MRT6DEBUG 876 if (mrt6debug & DEBUG_MFC) 877 log(LOG_DEBUG, 878 "add_mfc no upcall h %ld o %s g %s p %x\n", 879 hash, 880 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 881 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 882 mfccp->mf6cc_parent); 883 #endif 884 885 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 886 887 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 888 &mfccp->mf6cc_origin.sin6_addr)&& 889 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 890 &mfccp->mf6cc_mcastgrp.sin6_addr)) { 891 892 rt->mf6c_origin = mfccp->mf6cc_origin; 893 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 894 rt->mf6c_parent = mfccp->mf6cc_parent; 895 rt->mf6c_ifset = mfccp->mf6cc_ifset; 896 /* initialize pkt counters per src-grp */ 897 rt->mf6c_pkt_cnt = 0; 898 rt->mf6c_byte_cnt = 0; 899 rt->mf6c_wrong_if = 0; 900 901 if (rt->mf6c_expire) 902 n6expire[hash]--; 903 rt->mf6c_expire = 0; 904 } 905 } 906 if (rt == NULL) { 907 /* no upcall, so make a new entry */ 908 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE, 909 M_NOWAIT); 910 if (rt == NULL) { 911 splx(s); 912 return ENOBUFS; 913 } 914 915 /* insert new entry at head of hash chain */ 916 rt->mf6c_origin = mfccp->mf6cc_origin; 917 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 918 rt->mf6c_parent = mfccp->mf6cc_parent; 919 rt->mf6c_ifset = mfccp->mf6cc_ifset; 920 /* initialize pkt counters per src-grp */ 921 rt->mf6c_pkt_cnt = 0; 922 rt->mf6c_byte_cnt = 0; 923 rt->mf6c_wrong_if = 0; 924 rt->mf6c_expire = 0; 925 rt->mf6c_stall = NULL; 926 927 /* link into table */ 928 rt->mf6c_next = mf6ctable[hash]; 929 mf6ctable[hash] = rt; 930 } 931 } 932 splx(s); 933 return 0; 934 } 935 936 #ifdef UPCALL_TIMING 937 /* 938 * collect delay statistics on the upcalls 939 */ 940 static void 941 collate(struct timeval *t) 942 { 943 u_long d; 944 struct timeval tp; 945 u_long delta; 946 947 GET_TIME(tp); 948 949 if (TV_LT(*t, tp)) 950 { 951 TV_DELTA(tp, *t, delta); 952 953 d = delta >> 10; 954 if (d > UPCALL_MAX) 955 d = UPCALL_MAX; 956 957 ++upcall_data[d]; 958 } 959 } 960 #endif /* UPCALL_TIMING */ 961 962 /* 963 * Delete an mfc entry 964 */ 965 static int 966 del_m6fc(struct mf6cctl *mfccp) 967 { 968 struct sockaddr_in6 origin; 969 struct sockaddr_in6 mcastgrp; 970 struct mf6c *rt; 971 struct mf6c **nptr; 972 u_long hash; 973 int s; 974 975 origin = mfccp->mf6cc_origin; 976 mcastgrp = mfccp->mf6cc_mcastgrp; 977 hash = MF6CHASH(origin.sin6_addr, mcastgrp.sin6_addr); 978 979 #ifdef MRT6DEBUG 980 if (mrt6debug & DEBUG_MFC) 981 log(LOG_DEBUG,"del_m6fc orig %s mcastgrp %s\n", 982 ip6_sprintf(&origin.sin6_addr), 983 ip6_sprintf(&mcastgrp.sin6_addr)); 984 #endif 985 986 s = splsoftnet(); 987 988 nptr = &mf6ctable[hash]; 989 while ((rt = *nptr) != NULL) { 990 if (IN6_ARE_ADDR_EQUAL(&origin.sin6_addr, 991 &rt->mf6c_origin.sin6_addr) && 992 IN6_ARE_ADDR_EQUAL(&mcastgrp.sin6_addr, 993 &rt->mf6c_mcastgrp.sin6_addr) && 994 rt->mf6c_stall == NULL) 995 break; 996 997 nptr = &rt->mf6c_next; 998 } 999 if (rt == NULL) { 1000 splx(s); 1001 return EADDRNOTAVAIL; 1002 } 1003 1004 *nptr = rt->mf6c_next; 1005 free(rt, M_MRTABLE); 1006 1007 splx(s); 1008 1009 return 0; 1010 } 1011 1012 static int 1013 socket_send(struct socket *s, struct mbuf *mm, struct sockaddr_in6 *src) 1014 { 1015 if (s) { 1016 if (sbappendaddr(&s->so_rcv, 1017 (struct sockaddr *)src, 1018 mm, (struct mbuf *)0) != 0) { 1019 sorwakeup(s); 1020 return 0; 1021 } 1022 } 1023 m_freem(mm); 1024 return -1; 1025 } 1026 1027 /* 1028 * IPv6 multicast forwarding function. This function assumes that the packet 1029 * pointed to by "ip6" has arrived on (or is about to be sent to) the interface 1030 * pointed to by "ifp", and the packet is to be relayed to other networks 1031 * that have members of the packet's destination IPv6 multicast group. 1032 * 1033 * The packet is returned unscathed to the caller, unless it is 1034 * erroneous, in which case a non-zero return value tells the caller to 1035 * discard it. 1036 */ 1037 1038 int 1039 ip6_mforward(struct ip6_hdr *ip6, struct ifnet *ifp, struct mbuf *m) 1040 { 1041 struct mf6c *rt; 1042 struct mif6 *mifp; 1043 struct mbuf *mm; 1044 int s; 1045 mifi_t mifi; 1046 struct sockaddr_in6 sin6; 1047 1048 #ifdef MRT6DEBUG 1049 if (mrt6debug & DEBUG_FORWARD) 1050 log(LOG_DEBUG, "ip6_mforward: src %s, dst %s, ifindex %d\n", 1051 ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst), 1052 ifp->if_index); 1053 #endif 1054 1055 /* 1056 * Don't forward a packet with Hop limit of zero or one, 1057 * or a packet destined to a local-only group. 1058 */ 1059 if (ip6->ip6_hlim <= 1 || IN6_IS_ADDR_MC_NODELOCAL(&ip6->ip6_dst) || 1060 IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst)) 1061 return 0; 1062 ip6->ip6_hlim--; 1063 1064 /* 1065 * Source address check: do not forward packets with unspecified 1066 * source. It was discussed in July 2000, on ipngwg mailing list. 1067 * This is rather more serious than unicast cases, because some 1068 * MLD packets can be sent with the unspecified source address 1069 * (although such packets must normally set the hop limit field to 1). 1070 */ 1071 if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) { 1072 IP6_STATINC(IP6_STAT_CANTFORWARD); 1073 if (ip6_log_time + ip6_log_interval < time_second) { 1074 ip6_log_time = time_second; 1075 log(LOG_DEBUG, 1076 "cannot forward " 1077 "from %s to %s nxt %d received on %s\n", 1078 ip6_sprintf(&ip6->ip6_src), 1079 ip6_sprintf(&ip6->ip6_dst), 1080 ip6->ip6_nxt, 1081 m->m_pkthdr.rcvif ? 1082 if_name(m->m_pkthdr.rcvif) : "?"); 1083 } 1084 return 0; 1085 } 1086 1087 /* 1088 * Determine forwarding mifs from the forwarding cache table 1089 */ 1090 s = splsoftnet(); 1091 MF6CFIND(ip6->ip6_src, ip6->ip6_dst, rt); 1092 1093 /* Entry exists, so forward if necessary */ 1094 if (rt) { 1095 splx(s); 1096 return (ip6_mdq(m, ifp, rt)); 1097 } else { 1098 /* 1099 * If we don't have a route for packet's origin, 1100 * Make a copy of the packet & 1101 * send message to routing daemon 1102 */ 1103 1104 struct mbuf *mb0; 1105 struct rtdetq *rte; 1106 u_long hash; 1107 /* int i, npkts;*/ 1108 #ifdef UPCALL_TIMING 1109 struct timeval tp; 1110 1111 GET_TIME(tp); 1112 #endif /* UPCALL_TIMING */ 1113 1114 mrt6stat.mrt6s_no_route++; 1115 #ifdef MRT6DEBUG 1116 if (mrt6debug & (DEBUG_FORWARD | DEBUG_MFC)) 1117 log(LOG_DEBUG, "ip6_mforward: no rte s %s g %s\n", 1118 ip6_sprintf(&ip6->ip6_src), 1119 ip6_sprintf(&ip6->ip6_dst)); 1120 #endif 1121 1122 /* 1123 * Allocate mbufs early so that we don't do extra work if we 1124 * are just going to fail anyway. 1125 */ 1126 rte = (struct rtdetq *)malloc(sizeof(*rte), M_MRTABLE, 1127 M_NOWAIT); 1128 if (rte == NULL) { 1129 splx(s); 1130 return ENOBUFS; 1131 } 1132 mb0 = m_copy(m, 0, M_COPYALL); 1133 /* 1134 * Pullup packet header if needed before storing it, 1135 * as other references may modify it in the meantime. 1136 */ 1137 if (mb0 && 1138 (M_READONLY(mb0) || mb0->m_len < sizeof(struct ip6_hdr))) 1139 mb0 = m_pullup(mb0, sizeof(struct ip6_hdr)); 1140 if (mb0 == NULL) { 1141 free(rte, M_MRTABLE); 1142 splx(s); 1143 return ENOBUFS; 1144 } 1145 1146 /* is there an upcall waiting for this packet? */ 1147 hash = MF6CHASH(ip6->ip6_src, ip6->ip6_dst); 1148 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 1149 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, 1150 &rt->mf6c_origin.sin6_addr) && 1151 IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, 1152 &rt->mf6c_mcastgrp.sin6_addr) && 1153 (rt->mf6c_stall != NULL)) 1154 break; 1155 } 1156 1157 if (rt == NULL) { 1158 struct mrt6msg *im; 1159 struct omrt6msg *oim; 1160 1161 /* no upcall, so make a new entry */ 1162 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE, 1163 M_NOWAIT); 1164 if (rt == NULL) { 1165 free(rte, M_MRTABLE); 1166 m_freem(mb0); 1167 splx(s); 1168 return ENOBUFS; 1169 } 1170 /* 1171 * Make a copy of the header to send to the user 1172 * level process 1173 */ 1174 mm = m_copy(mb0, 0, sizeof(struct ip6_hdr)); 1175 1176 if (mm == NULL) { 1177 free(rte, M_MRTABLE); 1178 m_freem(mb0); 1179 free(rt, M_MRTABLE); 1180 splx(s); 1181 return ENOBUFS; 1182 } 1183 1184 /* 1185 * Send message to routing daemon 1186 */ 1187 sockaddr_in6_init(&sin6, &ip6->ip6_src, 0, 0, 0); 1188 1189 im = NULL; 1190 oim = NULL; 1191 switch (ip6_mrouter_ver) { 1192 case MRT6_OINIT: 1193 oim = mtod(mm, struct omrt6msg *); 1194 oim->im6_msgtype = MRT6MSG_NOCACHE; 1195 oim->im6_mbz = 0; 1196 break; 1197 case MRT6_INIT: 1198 im = mtod(mm, struct mrt6msg *); 1199 im->im6_msgtype = MRT6MSG_NOCACHE; 1200 im->im6_mbz = 0; 1201 break; 1202 default: 1203 free(rte, M_MRTABLE); 1204 m_freem(mb0); 1205 free(rt, M_MRTABLE); 1206 splx(s); 1207 return EINVAL; 1208 } 1209 1210 #ifdef MRT6DEBUG 1211 if (mrt6debug & DEBUG_FORWARD) 1212 log(LOG_DEBUG, 1213 "getting the iif info in the kernel\n"); 1214 #endif 1215 1216 for (mifp = mif6table, mifi = 0; 1217 mifi < nummifs && mifp->m6_ifp != ifp; 1218 mifp++, mifi++) 1219 ; 1220 1221 switch (ip6_mrouter_ver) { 1222 case MRT6_OINIT: 1223 oim->im6_mif = mifi; 1224 break; 1225 case MRT6_INIT: 1226 im->im6_mif = mifi; 1227 break; 1228 } 1229 1230 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1231 log(LOG_WARNING, "ip6_mforward: ip6_mrouter " 1232 "socket queue full\n"); 1233 mrt6stat.mrt6s_upq_sockfull++; 1234 free(rte, M_MRTABLE); 1235 m_freem(mb0); 1236 free(rt, M_MRTABLE); 1237 splx(s); 1238 return ENOBUFS; 1239 } 1240 1241 mrt6stat.mrt6s_upcalls++; 1242 1243 /* insert new entry at head of hash chain */ 1244 bzero(rt, sizeof(*rt)); 1245 sockaddr_in6_init(&rt->mf6c_origin, &ip6->ip6_src, 1246 0, 0, 0); 1247 sockaddr_in6_init(&rt->mf6c_mcastgrp, &ip6->ip6_dst, 1248 0, 0, 0); 1249 rt->mf6c_expire = UPCALL_EXPIRE; 1250 n6expire[hash]++; 1251 rt->mf6c_parent = MF6C_INCOMPLETE_PARENT; 1252 1253 /* link into table */ 1254 rt->mf6c_next = mf6ctable[hash]; 1255 mf6ctable[hash] = rt; 1256 /* Add this entry to the end of the queue */ 1257 rt->mf6c_stall = rte; 1258 } else { 1259 /* determine if q has overflowed */ 1260 struct rtdetq **p; 1261 int npkts = 0; 1262 1263 for (p = &rt->mf6c_stall; *p != NULL; p = &(*p)->next) 1264 if (++npkts > MAX_UPQ6) { 1265 mrt6stat.mrt6s_upq_ovflw++; 1266 free(rte, M_MRTABLE); 1267 m_freem(mb0); 1268 splx(s); 1269 return 0; 1270 } 1271 1272 /* Add this entry to the end of the queue */ 1273 *p = rte; 1274 } 1275 1276 rte->next = NULL; 1277 rte->m = mb0; 1278 rte->ifp = ifp; 1279 #ifdef UPCALL_TIMING 1280 rte->t = tp; 1281 #endif /* UPCALL_TIMING */ 1282 1283 splx(s); 1284 1285 return 0; 1286 } 1287 } 1288 1289 /* 1290 * Clean up cache entries if upcalls are not serviced 1291 * Call from the Slow Timeout mechanism, every 0.25 seconds. 1292 */ 1293 static void 1294 expire_upcalls(void *unused) 1295 { 1296 struct rtdetq *rte; 1297 struct mf6c *mfc, **nptr; 1298 int i; 1299 1300 mutex_enter(softnet_lock); 1301 KERNEL_LOCK(1, NULL); 1302 1303 for (i = 0; i < MF6CTBLSIZ; i++) { 1304 if (n6expire[i] == 0) 1305 continue; 1306 nptr = &mf6ctable[i]; 1307 while ((mfc = *nptr) != NULL) { 1308 rte = mfc->mf6c_stall; 1309 /* 1310 * Skip real cache entries 1311 * Make sure it wasn't marked to not expire (shouldn't happen) 1312 * If it expires now 1313 */ 1314 if (rte != NULL && 1315 mfc->mf6c_expire != 0 && 1316 --mfc->mf6c_expire == 0) { 1317 #ifdef MRT6DEBUG 1318 if (mrt6debug & DEBUG_EXPIRE) 1319 log(LOG_DEBUG, "expire_upcalls: expiring (%s %s)\n", 1320 ip6_sprintf(&mfc->mf6c_origin.sin6_addr), 1321 ip6_sprintf(&mfc->mf6c_mcastgrp.sin6_addr)); 1322 #endif 1323 /* 1324 * drop all the packets 1325 * free the mbuf with the pkt, if, timing info 1326 */ 1327 do { 1328 struct rtdetq *n = rte->next; 1329 m_freem(rte->m); 1330 free(rte, M_MRTABLE); 1331 rte = n; 1332 } while (rte != NULL); 1333 mrt6stat.mrt6s_cache_cleanups++; 1334 n6expire[i]--; 1335 1336 *nptr = mfc->mf6c_next; 1337 free(mfc, M_MRTABLE); 1338 } else { 1339 nptr = &mfc->mf6c_next; 1340 } 1341 } 1342 } 1343 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 1344 expire_upcalls, NULL); 1345 1346 KERNEL_UNLOCK_ONE(NULL); 1347 mutex_exit(softnet_lock); 1348 } 1349 1350 /* 1351 * Packet forwarding routine once entry in the cache is made 1352 */ 1353 static int 1354 ip6_mdq(struct mbuf *m, struct ifnet *ifp, struct mf6c *rt) 1355 { 1356 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 1357 mifi_t mifi, iif; 1358 struct mif6 *mifp; 1359 int plen = m->m_pkthdr.len; 1360 struct in6_addr src0, dst0; /* copies for local work */ 1361 u_int32_t iszone, idzone, oszone, odzone; 1362 int error = 0; 1363 1364 /* 1365 * Macro to send packet on mif. Since RSVP packets don't get counted on 1366 * input, they shouldn't get counted on output, so statistics keeping is 1367 * separate. 1368 */ 1369 1370 #define MC6_SEND(ip6, mifp, m) do { \ 1371 if ((mifp)->m6_flags & MIFF_REGISTER) \ 1372 register_send((ip6), (mifp), (m)); \ 1373 else \ 1374 phyint_send((ip6), (mifp), (m)); \ 1375 } while (/*CONSTCOND*/ 0) 1376 1377 /* 1378 * Don't forward if it didn't arrive from the parent mif 1379 * for its origin. 1380 */ 1381 mifi = rt->mf6c_parent; 1382 if ((mifi >= nummifs) || (mif6table[mifi].m6_ifp != ifp)) { 1383 /* came in the wrong interface */ 1384 #ifdef MRT6DEBUG 1385 if (mrt6debug & DEBUG_FORWARD) 1386 log(LOG_DEBUG, 1387 "wrong if: ifid %d mifi %d mififid %x\n", 1388 ifp->if_index, mifi, 1389 mif6table[mifi].m6_ifp ? 1390 mif6table[mifi].m6_ifp->if_index : -1); 1391 #endif 1392 mrt6stat.mrt6s_wrong_if++; 1393 rt->mf6c_wrong_if++; 1394 /* 1395 * If we are doing PIM processing, and we are forwarding 1396 * packets on this interface, send a message to the 1397 * routing daemon. 1398 */ 1399 /* have to make sure this is a valid mif */ 1400 if (mifi < nummifs && mif6table[mifi].m6_ifp) 1401 if (pim6 && (m->m_flags & M_LOOP) == 0) { 1402 /* 1403 * Check the M_LOOP flag to avoid an 1404 * unnecessary PIM assert. 1405 * XXX: M_LOOP is an ad-hoc hack... 1406 */ 1407 struct sockaddr_in6 sin6; 1408 1409 struct mbuf *mm; 1410 struct mrt6msg *im; 1411 struct omrt6msg *oim; 1412 1413 mm = m_copy(m, 0, sizeof(struct ip6_hdr)); 1414 if (mm && 1415 (M_READONLY(mm) || 1416 mm->m_len < sizeof(struct ip6_hdr))) 1417 mm = m_pullup(mm, sizeof(struct ip6_hdr)); 1418 if (mm == NULL) 1419 return ENOBUFS; 1420 1421 oim = NULL; 1422 im = NULL; 1423 switch (ip6_mrouter_ver) { 1424 case MRT6_OINIT: 1425 oim = mtod(mm, struct omrt6msg *); 1426 oim->im6_msgtype = MRT6MSG_WRONGMIF; 1427 oim->im6_mbz = 0; 1428 break; 1429 case MRT6_INIT: 1430 im = mtod(mm, struct mrt6msg *); 1431 im->im6_msgtype = MRT6MSG_WRONGMIF; 1432 im->im6_mbz = 0; 1433 break; 1434 default: 1435 m_freem(mm); 1436 return EINVAL; 1437 } 1438 1439 for (mifp = mif6table, iif = 0; 1440 iif < nummifs && mifp && 1441 mifp->m6_ifp != ifp; 1442 mifp++, iif++) 1443 ; 1444 1445 bzero(&sin6, sizeof(sin6)); 1446 sin6.sin6_len = sizeof(sin6); 1447 sin6.sin6_family = AF_INET6; 1448 switch (ip6_mrouter_ver) { 1449 case MRT6_OINIT: 1450 oim->im6_mif = iif; 1451 sin6.sin6_addr = oim->im6_src; 1452 break; 1453 case MRT6_INIT: 1454 im->im6_mif = iif; 1455 sin6.sin6_addr = im->im6_src; 1456 break; 1457 } 1458 1459 mrt6stat.mrt6s_upcalls++; 1460 1461 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1462 #ifdef MRT6DEBUG 1463 if (mrt6debug) 1464 log(LOG_WARNING, "mdq, ip6_mrouter socket queue full\n"); 1465 #endif 1466 ++mrt6stat.mrt6s_upq_sockfull; 1467 return ENOBUFS; 1468 } /* if socket Q full */ 1469 } /* if PIM */ 1470 return 0; 1471 } /* if wrong iif */ 1472 1473 /* If I sourced this packet, it counts as output, else it was input. */ 1474 if (m->m_pkthdr.rcvif == NULL) { 1475 /* XXX: is rcvif really NULL when output?? */ 1476 mif6table[mifi].m6_pkt_out++; 1477 mif6table[mifi].m6_bytes_out += plen; 1478 } else { 1479 mif6table[mifi].m6_pkt_in++; 1480 mif6table[mifi].m6_bytes_in += plen; 1481 } 1482 rt->mf6c_pkt_cnt++; 1483 rt->mf6c_byte_cnt += plen; 1484 1485 /* 1486 * For each mif, forward a copy of the packet if there are group 1487 * members downstream on the interface. 1488 */ 1489 src0 = ip6->ip6_src; 1490 dst0 = ip6->ip6_dst; 1491 if ((error = in6_setscope(&src0, ifp, &iszone)) != 0 || 1492 (error = in6_setscope(&dst0, ifp, &idzone)) != 0) { 1493 IP6_STATINC(IP6_STAT_BADSCOPE); 1494 return (error); 1495 } 1496 for (mifp = mif6table, mifi = 0; mifi < nummifs; mifp++, mifi++) 1497 if (IF_ISSET(mifi, &rt->mf6c_ifset)) { 1498 if (mif6table[mifi].m6_ifp == NULL) 1499 continue; 1500 /* 1501 * check if the outgoing packet is going to break 1502 * a scope boundary. 1503 * XXX: For packets through PIM register tunnel 1504 * interface, we believe the routing daemon. 1505 */ 1506 if ((mif6table[rt->mf6c_parent].m6_flags & 1507 MIFF_REGISTER) == 0 && 1508 (mif6table[mifi].m6_flags & MIFF_REGISTER) == 0) { 1509 if (in6_setscope(&src0, mif6table[mifi].m6_ifp, 1510 &oszone) || 1511 in6_setscope(&dst0, mif6table[mifi].m6_ifp, 1512 &odzone) || 1513 iszone != oszone || idzone != odzone) { 1514 IP6_STATINC(IP6_STAT_BADSCOPE); 1515 continue; 1516 } 1517 } 1518 1519 mifp->m6_pkt_out++; 1520 mifp->m6_bytes_out += plen; 1521 MC6_SEND(ip6, mifp, m); 1522 } 1523 return 0; 1524 } 1525 1526 static void 1527 phyint_send(struct ip6_hdr *ip6, struct mif6 *mifp, struct mbuf *m) 1528 { 1529 struct mbuf *mb_copy; 1530 struct ifnet *ifp = mifp->m6_ifp; 1531 int error = 0; 1532 int s; 1533 static struct route ro; 1534 struct in6_multi *in6m; 1535 struct sockaddr_in6 dst6; 1536 u_long linkmtu; 1537 1538 s = splsoftnet(); 1539 /* 1540 * Make a new reference to the packet; make sure that 1541 * the IPv6 header is actually copied, not just referenced, 1542 * so that ip6_output() only scribbles on the copy. 1543 */ 1544 mb_copy = m_copy(m, 0, M_COPYALL); 1545 if (mb_copy && 1546 (M_READONLY(mb_copy) || mb_copy->m_len < sizeof(struct ip6_hdr))) 1547 mb_copy = m_pullup(mb_copy, sizeof(struct ip6_hdr)); 1548 if (mb_copy == NULL) { 1549 splx(s); 1550 return; 1551 } 1552 /* set MCAST flag to the outgoing packet */ 1553 mb_copy->m_flags |= M_MCAST; 1554 1555 /* 1556 * If we sourced the packet, call ip6_output since we may divide 1557 * the packet into fragments when the packet is too big for the 1558 * outgoing interface. 1559 * Otherwise, we can simply send the packet to the interface 1560 * sending queue. 1561 */ 1562 if (m->m_pkthdr.rcvif == NULL) { 1563 struct ip6_moptions im6o; 1564 1565 im6o.im6o_multicast_ifp = ifp; 1566 /* XXX: ip6_output will override ip6->ip6_hlim */ 1567 im6o.im6o_multicast_hlim = ip6->ip6_hlim; 1568 im6o.im6o_multicast_loop = 1; 1569 error = ip6_output(mb_copy, NULL, &ro, IPV6_FORWARDING, 1570 &im6o, NULL, NULL); 1571 1572 #ifdef MRT6DEBUG 1573 if (mrt6debug & DEBUG_XMIT) 1574 log(LOG_DEBUG, "phyint_send on mif %d err %d\n", 1575 mifp - mif6table, error); 1576 #endif 1577 splx(s); 1578 return; 1579 } 1580 1581 /* 1582 * If we belong to the destination multicast group 1583 * on the outgoing interface, loop back a copy. 1584 */ 1585 /* 1586 * Does not have to check source info, as it's alreay covered by 1587 * ip6_input 1588 */ 1589 sockaddr_in6_init(&dst6, &ip6->ip6_dst, 0, 0, 0); 1590 1591 IN6_LOOKUP_MULTI(ip6->ip6_dst, ifp, in6m); 1592 if (in6m != NULL) { 1593 ip6_mloopback(ifp, m, 1594 satocsin6(rtcache_getdst(&ro))); 1595 } 1596 1597 /* 1598 * Put the packet into the sending queue of the outgoing interface 1599 * if it would fit in the MTU of the interface. 1600 */ 1601 linkmtu = IN6_LINKMTU(ifp); 1602 if (mb_copy->m_pkthdr.len <= linkmtu || linkmtu < IPV6_MMTU) { 1603 /* 1604 * We could call if_output directly here, but we use 1605 * nd6_output on purpose to see if IPv6 operation is allowed 1606 * on the interface. 1607 */ 1608 error = nd6_output(ifp, ifp, mb_copy, &dst6, NULL); 1609 #ifdef MRT6DEBUG 1610 if (mrt6debug & DEBUG_XMIT) 1611 log(LOG_DEBUG, "phyint_send on mif %d err %d\n", 1612 mifp - mif6table, error); 1613 #endif 1614 } else { 1615 /* 1616 * pMTU discovery is intentionally disabled by default, since 1617 * various router may notify pMTU in multicast, which can be 1618 * a DDoS to a router 1619 */ 1620 if (ip6_mcast_pmtu) 1621 icmp6_error(mb_copy, ICMP6_PACKET_TOO_BIG, 0, linkmtu); 1622 else { 1623 #ifdef MRT6DEBUG 1624 if (mrt6debug & DEBUG_XMIT) 1625 log(LOG_DEBUG, 1626 "phyint_send: packet too big on %s o %s g %s" 1627 " size %d(discarded)\n", 1628 if_name(ifp), 1629 ip6_sprintf(&ip6->ip6_src), 1630 ip6_sprintf(&ip6->ip6_dst), 1631 mb_copy->m_pkthdr.len); 1632 #endif /* MRT6DEBUG */ 1633 m_freem(mb_copy); /* simply discard the packet */ 1634 } 1635 } 1636 1637 splx(s); 1638 } 1639 1640 static int 1641 register_send(struct ip6_hdr *ip6, struct mif6 *mif, struct mbuf *m) 1642 { 1643 struct mbuf *mm; 1644 int i, len = m->m_pkthdr.len; 1645 struct sockaddr_in6 sin6; 1646 struct mrt6msg *im6; 1647 1648 #ifdef MRT6DEBUG 1649 if (mrt6debug) 1650 log(LOG_DEBUG, "** IPv6 register_send **\n src %s dst %s\n", 1651 ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst)); 1652 #endif 1653 PIM6_STATINC(PIM6_STAT_SND_REGISTERS); 1654 1655 /* Make a copy of the packet to send to the user level process */ 1656 MGETHDR(mm, M_DONTWAIT, MT_HEADER); 1657 if (mm == NULL) 1658 return ENOBUFS; 1659 mm->m_data += max_linkhdr; 1660 mm->m_len = sizeof(struct ip6_hdr); 1661 1662 if ((mm->m_next = m_copy(m, 0, M_COPYALL)) == NULL) { 1663 m_freem(mm); 1664 return ENOBUFS; 1665 } 1666 i = MHLEN - M_LEADINGSPACE(mm); 1667 if (i > len) 1668 i = len; 1669 mm = m_pullup(mm, i); 1670 if (mm == NULL) 1671 return ENOBUFS; 1672 /* TODO: check it! */ 1673 mm->m_pkthdr.len = len + sizeof(struct ip6_hdr); 1674 1675 /* 1676 * Send message to routing daemon 1677 */ 1678 sockaddr_in6_init(&sin6, &ip6->ip6_src, 0, 0, 0); 1679 1680 im6 = mtod(mm, struct mrt6msg *); 1681 im6->im6_msgtype = MRT6MSG_WHOLEPKT; 1682 im6->im6_mbz = 0; 1683 1684 im6->im6_mif = mif - mif6table; 1685 1686 /* iif info is not given for reg. encap.n */ 1687 mrt6stat.mrt6s_upcalls++; 1688 1689 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1690 #ifdef MRT6DEBUG 1691 if (mrt6debug) 1692 log(LOG_WARNING, 1693 "register_send: ip6_mrouter socket queue full\n"); 1694 #endif 1695 ++mrt6stat.mrt6s_upq_sockfull; 1696 return ENOBUFS; 1697 } 1698 return 0; 1699 } 1700 1701 /* 1702 * PIM sparse mode hook 1703 * Receives the pim control messages, and passes them up to the listening 1704 * socket, using rip6_input. 1705 * The only message processed is the REGISTER pim message; the pim header 1706 * is stripped off, and the inner packet is passed to register_mforward. 1707 */ 1708 int 1709 pim6_input(struct mbuf **mp, int *offp, int proto) 1710 { 1711 struct pim *pim; /* pointer to a pim struct */ 1712 struct ip6_hdr *ip6; 1713 int pimlen; 1714 struct mbuf *m = *mp; 1715 int minlen; 1716 int off = *offp; 1717 1718 PIM6_STATINC(PIM6_STAT_RCV_TOTAL); 1719 1720 ip6 = mtod(m, struct ip6_hdr *); 1721 pimlen = m->m_pkthdr.len - *offp; 1722 1723 /* 1724 * Validate lengths 1725 */ 1726 if (pimlen < PIM_MINLEN) { 1727 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1728 #ifdef MRT6DEBUG 1729 if (mrt6debug & DEBUG_PIM) 1730 log(LOG_DEBUG,"pim6_input: PIM packet too short\n"); 1731 #endif 1732 m_freem(m); 1733 return (IPPROTO_DONE); 1734 } 1735 1736 /* 1737 * if the packet is at least as big as a REGISTER, go ahead 1738 * and grab the PIM REGISTER header size, to avoid another 1739 * possible m_pullup() later. 1740 * 1741 * PIM_MINLEN == pimhdr + u_int32 == 8 1742 * PIM6_REG_MINLEN == pimhdr + reghdr + eip6hdr == 4 + 4 + 40 1743 */ 1744 minlen = (pimlen >= PIM6_REG_MINLEN) ? PIM6_REG_MINLEN : PIM_MINLEN; 1745 1746 /* 1747 * Make sure that the IP6 and PIM headers in contiguous memory, and 1748 * possibly the PIM REGISTER header 1749 */ 1750 IP6_EXTHDR_GET(pim, struct pim *, m, off, minlen); 1751 if (pim == NULL) { 1752 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1753 return IPPROTO_DONE; 1754 } 1755 1756 /* PIM version check */ 1757 if (pim->pim_ver != PIM_VERSION) { 1758 PIM6_STATINC(PIM6_STAT_RCV_BADVERSION); 1759 #ifdef MRT6DEBUG 1760 log(LOG_ERR, 1761 "pim6_input: incorrect version %d, expecting %d\n", 1762 pim->pim_ver, PIM_VERSION); 1763 #endif 1764 m_freem(m); 1765 return (IPPROTO_DONE); 1766 } 1767 1768 #define PIM6_CHECKSUM 1769 #ifdef PIM6_CHECKSUM 1770 { 1771 int cksumlen; 1772 1773 /* 1774 * Validate checksum. 1775 * If PIM REGISTER, exclude the data packet 1776 */ 1777 if (pim->pim_type == PIM_REGISTER) 1778 cksumlen = PIM_MINLEN; 1779 else 1780 cksumlen = pimlen; 1781 1782 if (in6_cksum(m, IPPROTO_PIM, off, cksumlen)) { 1783 PIM6_STATINC(PIM6_STAT_RCV_BADSUM); 1784 #ifdef MRT6DEBUG 1785 if (mrt6debug & DEBUG_PIM) 1786 log(LOG_DEBUG, 1787 "pim6_input: invalid checksum\n"); 1788 #endif 1789 m_freem(m); 1790 return (IPPROTO_DONE); 1791 } 1792 } 1793 #endif /* PIM_CHECKSUM */ 1794 1795 if (pim->pim_type == PIM_REGISTER) { 1796 /* 1797 * since this is a REGISTER, we'll make a copy of the register 1798 * headers ip6+pim+u_int32_t+encap_ip6, to be passed up to the 1799 * routing daemon. 1800 */ 1801 static const struct sockaddr_in6 dst = { 1802 .sin6_len = sizeof(dst), 1803 .sin6_family = AF_INET6, 1804 }; 1805 1806 struct mbuf *mcp; 1807 struct ip6_hdr *eip6; 1808 u_int32_t *reghdr; 1809 1810 PIM6_STATINC(PIM6_STAT_RCV_REGISTERS); 1811 1812 if ((reg_mif_num >= nummifs) || (reg_mif_num == (mifi_t) -1)) { 1813 #ifdef MRT6DEBUG 1814 if (mrt6debug & DEBUG_PIM) 1815 log(LOG_DEBUG, 1816 "pim6_input: register mif not set: %d\n", 1817 reg_mif_num); 1818 #endif 1819 m_freem(m); 1820 return (IPPROTO_DONE); 1821 } 1822 1823 reghdr = (u_int32_t *)(pim + 1); 1824 1825 if ((ntohl(*reghdr) & PIM_NULL_REGISTER)) 1826 goto pim6_input_to_daemon; 1827 1828 /* 1829 * Validate length 1830 */ 1831 if (pimlen < PIM6_REG_MINLEN) { 1832 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1833 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1834 #ifdef MRT6DEBUG 1835 log(LOG_ERR, 1836 "pim6_input: register packet size too " 1837 "small %d from %s\n", 1838 pimlen, ip6_sprintf(&ip6->ip6_src)); 1839 #endif 1840 m_freem(m); 1841 return (IPPROTO_DONE); 1842 } 1843 1844 eip6 = (struct ip6_hdr *) (reghdr + 1); 1845 #ifdef MRT6DEBUG 1846 if (mrt6debug & DEBUG_PIM) 1847 log(LOG_DEBUG, 1848 "pim6_input[register], eip6: %s -> %s, " 1849 "eip6 plen %d\n", 1850 ip6_sprintf(&eip6->ip6_src), 1851 ip6_sprintf(&eip6->ip6_dst), 1852 ntohs(eip6->ip6_plen)); 1853 #endif 1854 1855 /* verify the version number of the inner packet */ 1856 if ((eip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) { 1857 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1858 #ifdef MRT6DEBUG 1859 log(LOG_DEBUG, "pim6_input: invalid IP version (%d) " 1860 "of the inner packet\n", 1861 (eip6->ip6_vfc & IPV6_VERSION)); 1862 #endif 1863 m_freem(m); 1864 return (IPPROTO_NONE); 1865 } 1866 1867 /* verify the inner packet is destined to a mcast group */ 1868 if (!IN6_IS_ADDR_MULTICAST(&eip6->ip6_dst)) { 1869 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1870 #ifdef MRT6DEBUG 1871 if (mrt6debug & DEBUG_PIM) 1872 log(LOG_DEBUG, 1873 "pim6_input: inner packet of register " 1874 "is not multicast %s\n", 1875 ip6_sprintf(&eip6->ip6_dst)); 1876 #endif 1877 m_freem(m); 1878 return (IPPROTO_DONE); 1879 } 1880 1881 /* 1882 * make a copy of the whole header to pass to the daemon later. 1883 */ 1884 mcp = m_copy(m, 0, off + PIM6_REG_MINLEN); 1885 if (mcp == NULL) { 1886 #ifdef MRT6DEBUG 1887 log(LOG_ERR, 1888 "pim6_input: pim register: " 1889 "could not copy register head\n"); 1890 #endif 1891 m_freem(m); 1892 return (IPPROTO_DONE); 1893 } 1894 1895 /* 1896 * forward the inner ip6 packet; point m_data at the inner ip6. 1897 */ 1898 m_adj(m, off + PIM_MINLEN); 1899 #ifdef MRT6DEBUG 1900 if (mrt6debug & DEBUG_PIM) { 1901 log(LOG_DEBUG, 1902 "pim6_input: forwarding decapsulated register: " 1903 "src %s, dst %s, mif %d\n", 1904 ip6_sprintf(&eip6->ip6_src), 1905 ip6_sprintf(&eip6->ip6_dst), 1906 reg_mif_num); 1907 } 1908 #endif 1909 1910 looutput(mif6table[reg_mif_num].m6_ifp, m, 1911 (struct sockaddr *)__UNCONST(&dst), 1912 (struct rtentry *) NULL); 1913 1914 /* prepare the register head to send to the mrouting daemon */ 1915 m = mcp; 1916 } 1917 1918 /* 1919 * Pass the PIM message up to the daemon; if it is a register message 1920 * pass the 'head' only up to the daemon. This includes the 1921 * encapsulator ip6 header, pim header, register header and the 1922 * encapsulated ip6 header. 1923 */ 1924 pim6_input_to_daemon: 1925 rip6_input(&m, offp, proto); 1926 return (IPPROTO_DONE); 1927 } 1928 1929 static int 1930 sysctl_net_inet6_pim6_stats(SYSCTLFN_ARGS) 1931 { 1932 netstat_sysctl_context ctx; 1933 uint64_t pim6s[PIM6_NSTATS]; 1934 1935 ctx.ctx_stat = pim6stat_percpu; 1936 ctx.ctx_counters = pim6s; 1937 ctx.ctx_ncounters = PIM6_NSTATS; 1938 return (NETSTAT_SYSCTL(&ctx)); 1939 } 1940 1941 SYSCTL_SETUP(sysctl_net_inet6_pim6_setup, "sysctl net.inet6.pim6 subtree setup") 1942 { 1943 sysctl_createv(clog, 0, NULL, NULL, 1944 CTLFLAG_PERMANENT, 1945 CTLTYPE_NODE, "net", NULL, 1946 NULL, 0, NULL, 0, 1947 CTL_NET, CTL_EOL); 1948 sysctl_createv(clog, 0, NULL, NULL, 1949 CTLFLAG_PERMANENT, 1950 CTLTYPE_NODE, "inet6", NULL, 1951 NULL, 0, NULL, 0, 1952 CTL_NET, PF_INET6, CTL_EOL); 1953 sysctl_createv(clog, 0, NULL, NULL, 1954 CTLFLAG_PERMANENT, 1955 CTLTYPE_NODE, "pim6", 1956 SYSCTL_DESCR("PIMv6 settings"), 1957 NULL, 0, NULL, 0, 1958 CTL_NET, PF_INET6, IPPROTO_PIM, CTL_EOL); 1959 1960 sysctl_createv(clog, 0, NULL, NULL, 1961 CTLFLAG_PERMANENT, 1962 CTLTYPE_STRUCT, "stats", 1963 SYSCTL_DESCR("PIMv6 statistics"), 1964 sysctl_net_inet6_pim6_stats, 0, NULL, 0, 1965 CTL_NET, PF_INET6, IPPROTO_PIM, PIM6CTL_STATS, 1966 CTL_EOL); 1967 } 1968
Indexes created Wed Sep 24 14:09:57 GMT 2025