1 /* $NetBSD: ip6_mroute.c,v 1.105 2013/11/21 21:55:13 riz 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 1.105 2013/11/21 21:55:13 riz Exp $"); 121 122 #include "opt_inet.h" 123 #include "opt_mrouting.h" 124 125 #include <sys/param.h> 126 #include <sys/systm.h> 127 #include <sys/callout.h> 128 #include <sys/mbuf.h> 129 #include <sys/socket.h> 130 #include <sys/socketvar.h> 131 #include <sys/sockio.h> 132 #include <sys/protosw.h> 133 #include <sys/errno.h> 134 #include <sys/time.h> 135 #include <sys/kernel.h> 136 #include <sys/ioctl.h> 137 #include <sys/sysctl.h> 138 #include <sys/syslog.h> 139 140 #include <net/if.h> 141 #include <net/route.h> 142 #include <net/raw_cb.h> 143 #include <net/net_stats.h> 144 145 #include <netinet/in.h> 146 #include <netinet/in_var.h> 147 #include <netinet/icmp6.h> 148 149 #include <netinet/ip6.h> 150 #include <netinet6/ip6_var.h> 151 #include <netinet6/ip6_private.h> 152 #include <netinet6/ip6_mroute.h> 153 #include <netinet6/scope6_var.h> 154 #include <netinet6/pim6.h> 155 #include <netinet6/pim6_var.h> 156 #include <netinet6/nd6.h> 157 158 #include <net/net_osdep.h> 159 160 static int ip6_mdq(struct mbuf *, struct ifnet *, struct mf6c *); 161 static void phyint_send(struct ip6_hdr *, struct mif6 *, struct mbuf *); 162 163 static int set_pim6(int *); 164 static int socket_send(struct socket *, struct mbuf *, 165 struct sockaddr_in6 *); 166 static int register_send(struct ip6_hdr *, struct mif6 *, struct mbuf *); 167 168 /* 169 * Globals. All but ip6_mrouter, ip6_mrtproto and mrt6stat could be static, 170 * except for netstat or debugging purposes. 171 */ 172 struct socket *ip6_mrouter = NULL; 173 int ip6_mrouter_ver = 0; 174 int ip6_mrtproto = IPPROTO_PIM; /* for netstat only */ 175 struct mrt6stat mrt6stat; 176 177 #define NO_RTE_FOUND 0x1 178 #define RTE_FOUND 0x2 179 180 struct mf6c *mf6ctable[MF6CTBLSIZ]; 181 u_char n6expire[MF6CTBLSIZ]; 182 struct mif6 mif6table[MAXMIFS]; 183 #ifdef MRT6DEBUG 184 u_int mrt6debug = 0; /* debug level */ 185 #define DEBUG_MFC 0x02 186 #define DEBUG_FORWARD 0x04 187 #define DEBUG_EXPIRE 0x08 188 #define DEBUG_XMIT 0x10 189 #define DEBUG_REG 0x20 190 #define DEBUG_PIM 0x40 191 #define __mrt6debugused /* empty */ 192 #else 193 #define __mrt6debugused __unused 194 #endif 195 196 static void expire_upcalls(void *); 197 #define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */ 198 #define UPCALL_EXPIRE 6 /* number of timeouts */ 199 200 #ifdef INET 201 #ifdef MROUTING 202 extern struct socket *ip_mrouter; 203 #endif 204 #endif 205 206 /* 207 * 'Interfaces' associated with decapsulator (so we can tell 208 * packets that went through it from ones that get reflected 209 * by a broken gateway). These interfaces are never linked into 210 * the system ifnet list & no routes point to them. I.e., packets 211 * can't be sent this way. They only exist as a placeholder for 212 * multicast source verification. 213 */ 214 struct ifnet multicast_register_if6; 215 216 #define ENCAP_HOPS 64 217 218 /* 219 * Private variables. 220 */ 221 static mifi_t nummifs = 0; 222 static mifi_t reg_mif_num = (mifi_t)-1; 223 224 static percpu_t *pim6stat_percpu; 225 226 #define PIM6_STATINC(x) _NET_STATINC(pim6stat_percpu, x) 227 228 static int pim6; 229 230 /* 231 * Hash function for a source, group entry 232 */ 233 #define MF6CHASH(a, g) MF6CHASHMOD((a).s6_addr32[0] ^ (a).s6_addr32[1] ^ \ 234 (a).s6_addr32[2] ^ (a).s6_addr32[3] ^ \ 235 (g).s6_addr32[0] ^ (g).s6_addr32[1] ^ \ 236 (g).s6_addr32[2] ^ (g).s6_addr32[3]) 237 238 /* 239 * Find a route for a given origin IPv6 address and Multicast group address. 240 * Quality of service parameter to be added in the future!!! 241 */ 242 243 #define MF6CFIND(o, g, rt) do { \ 244 struct mf6c *_rt = mf6ctable[MF6CHASH(o,g)]; \ 245 rt = NULL; \ 246 mrt6stat.mrt6s_mfc_lookups++; \ 247 while (_rt) { \ 248 if (IN6_ARE_ADDR_EQUAL(&_rt->mf6c_origin.sin6_addr, &(o)) && \ 249 IN6_ARE_ADDR_EQUAL(&_rt->mf6c_mcastgrp.sin6_addr, &(g)) && \ 250 (_rt->mf6c_stall == NULL)) { \ 251 rt = _rt; \ 252 break; \ 253 } \ 254 _rt = _rt->mf6c_next; \ 255 } \ 256 if (rt == NULL) { \ 257 mrt6stat.mrt6s_mfc_misses++; \ 258 } \ 259 } while (/*CONSTCOND*/ 0) 260 261 /* 262 * Macros to compute elapsed time efficiently 263 * Borrowed from Van Jacobson's scheduling code 264 */ 265 #define TV_DELTA(a, b, delta) do { \ 266 int xxs; \ 267 \ 268 delta = (a).tv_usec - (b).tv_usec; \ 269 if ((xxs = (a).tv_sec - (b).tv_sec)) { \ 270 switch (xxs) { \ 271 case 2: \ 272 delta += 1000000; \ 273 /* FALLTHROUGH */ \ 274 case 1: \ 275 delta += 1000000; \ 276 break; \ 277 default: \ 278 delta += (1000000 * xxs); \ 279 } \ 280 } \ 281 } while (/*CONSTCOND*/ 0) 282 283 #define TV_LT(a, b) (((a).tv_usec < (b).tv_usec && \ 284 (a).tv_sec <= (b).tv_sec) || (a).tv_sec < (b).tv_sec) 285 286 #ifdef UPCALL_TIMING 287 #define UPCALL_MAX 50 288 u_long upcall_data[UPCALL_MAX + 1]; 289 static void collate(); 290 #endif /* UPCALL_TIMING */ 291 292 static int get_sg_cnt(struct sioc_sg_req6 *); 293 static int get_mif6_cnt(struct sioc_mif_req6 *); 294 static int ip6_mrouter_init(struct socket *, int, int); 295 static int add_m6if(struct mif6ctl *); 296 static int del_m6if(mifi_t *); 297 static int add_m6fc(struct mf6cctl *); 298 static int del_m6fc(struct mf6cctl *); 299 static void sysctl_net_inet6_pim6_setup(struct sysctllog **); 300 301 static callout_t expire_upcalls_ch; 302 303 void 304 pim6_init(void) 305 { 306 307 sysctl_net_inet6_pim6_setup(NULL); 308 pim6stat_percpu = percpu_alloc(sizeof(uint64_t) * PIM6_NSTATS); 309 } 310 311 /* 312 * Handle MRT setsockopt commands to modify the multicast routing tables. 313 */ 314 int 315 ip6_mrouter_set(struct socket *so, struct sockopt *sopt) 316 { 317 int error, optval; 318 struct mif6ctl mifc; 319 struct mf6cctl mfcc; 320 mifi_t mifi; 321 322 if (sopt->sopt_name != MRT6_INIT && so != ip6_mrouter) 323 return (EACCES); 324 325 error = 0; 326 327 switch (sopt->sopt_name) { 328 #ifdef MRT6_OINIT 329 case MRT6_OINIT: 330 #endif 331 case MRT6_INIT: 332 error = sockopt_getint(sopt, &optval); 333 if (error) 334 break; 335 return (ip6_mrouter_init(so, optval, sopt->sopt_name)); 336 case MRT6_DONE: 337 return (ip6_mrouter_done()); 338 case MRT6_ADD_MIF: 339 error = sockopt_get(sopt, &mifc, sizeof(mifc)); 340 if (error) 341 break; 342 return (add_m6if(&mifc)); 343 case MRT6_DEL_MIF: 344 error = sockopt_get(sopt, &mifi, sizeof(mifi)); 345 if (error) 346 break; 347 return (del_m6if(&mifi)); 348 case MRT6_ADD_MFC: 349 error = sockopt_get(sopt, &mfcc, sizeof(mfcc)); 350 if (error) 351 break; 352 return (add_m6fc(&mfcc)); 353 case MRT6_DEL_MFC: 354 error = sockopt_get(sopt, &mfcc, sizeof(mfcc)); 355 if (error) 356 break; 357 return (del_m6fc(&mfcc)); 358 case MRT6_PIM: 359 error = sockopt_getint(sopt, &optval); 360 if (error) 361 break; 362 return (set_pim6(&optval)); 363 default: 364 error = EOPNOTSUPP; 365 } 366 367 return (error); 368 } 369 370 /* 371 * Handle MRT getsockopt commands 372 */ 373 int 374 ip6_mrouter_get(struct socket *so, struct sockopt *sopt) 375 { 376 int error; 377 378 if (so != ip6_mrouter) return EACCES; 379 380 error = 0; 381 382 switch (sopt->sopt_name) { 383 case MRT6_PIM: 384 error = sockopt_set(sopt, &pim6, sizeof(pim6)); 385 break; 386 default: 387 error = EOPNOTSUPP; 388 break; 389 } 390 391 return (error); 392 } 393 394 /* 395 * Handle ioctl commands to obtain information from the cache 396 */ 397 int 398 mrt6_ioctl(u_long cmd, void *data) 399 { 400 401 switch (cmd) { 402 case SIOCGETSGCNT_IN6: 403 return (get_sg_cnt((struct sioc_sg_req6 *)data)); 404 case SIOCGETMIFCNT_IN6: 405 return (get_mif6_cnt((struct sioc_mif_req6 *)data)); 406 default: 407 return (EINVAL); 408 } 409 } 410 411 /* 412 * returns the packet, byte, rpf-failure count for the source group provided 413 */ 414 static int 415 get_sg_cnt(struct sioc_sg_req6 *req) 416 { 417 struct mf6c *rt; 418 int s; 419 420 s = splsoftnet(); 421 MF6CFIND(req->src.sin6_addr, req->grp.sin6_addr, rt); 422 splx(s); 423 if (rt != NULL) { 424 req->pktcnt = rt->mf6c_pkt_cnt; 425 req->bytecnt = rt->mf6c_byte_cnt; 426 req->wrong_if = rt->mf6c_wrong_if; 427 } else 428 return (ESRCH); 429 #if 0 430 req->pktcnt = req->bytecnt = req->wrong_if = 0xffffffff; 431 #endif 432 433 return 0; 434 } 435 436 /* 437 * returns the input and output packet and byte counts on the mif provided 438 */ 439 static int 440 get_mif6_cnt(struct sioc_mif_req6 *req) 441 { 442 mifi_t mifi = req->mifi; 443 444 if (mifi >= nummifs) 445 return EINVAL; 446 447 req->icount = mif6table[mifi].m6_pkt_in; 448 req->ocount = mif6table[mifi].m6_pkt_out; 449 req->ibytes = mif6table[mifi].m6_bytes_in; 450 req->obytes = mif6table[mifi].m6_bytes_out; 451 452 return 0; 453 } 454 455 static int 456 set_pim6(int *i) 457 { 458 if ((*i != 1) && (*i != 0)) 459 return EINVAL; 460 461 pim6 = *i; 462 463 return 0; 464 } 465 466 /* 467 * Enable multicast routing 468 */ 469 static int 470 ip6_mrouter_init(struct socket *so, int v, int cmd) 471 { 472 #ifdef MRT6DEBUG 473 if (mrt6debug) 474 log(LOG_DEBUG, 475 "ip6_mrouter_init: so_type = %d, pr_protocol = %d\n", 476 so->so_type, so->so_proto->pr_protocol); 477 #endif 478 479 if (so->so_type != SOCK_RAW || 480 so->so_proto->pr_protocol != IPPROTO_ICMPV6) 481 return (EOPNOTSUPP); 482 483 if (v != 1) 484 return (ENOPROTOOPT); 485 486 if (ip6_mrouter != NULL) 487 return (EADDRINUSE); 488 489 ip6_mrouter = so; 490 ip6_mrouter_ver = cmd; 491 492 memset((void *)mf6ctable, 0, sizeof(mf6ctable)); 493 memset((void *)n6expire, 0, sizeof(n6expire)); 494 495 pim6 = 0;/* used for stubbing out/in pim stuff */ 496 497 callout_init(&expire_upcalls_ch, CALLOUT_MPSAFE); 498 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 499 expire_upcalls, NULL); 500 501 #ifdef MRT6DEBUG 502 if (mrt6debug) 503 log(LOG_DEBUG, "ip6_mrouter_init\n"); 504 #endif 505 506 return 0; 507 } 508 509 /* 510 * Disable multicast routing 511 */ 512 int 513 ip6_mrouter_done(void) 514 { 515 mifi_t mifi; 516 int i; 517 struct ifnet *ifp; 518 struct sockaddr_in6 sin6; 519 struct mf6c *rt; 520 struct rtdetq *rte; 521 int s; 522 523 s = splsoftnet(); 524 525 /* 526 * For each phyint in use, disable promiscuous reception of all IPv6 527 * multicasts. 528 */ 529 #ifdef INET 530 #ifdef MROUTING 531 /* 532 * If there is still IPv4 multicast routing daemon, 533 * we remain interfaces to receive all muliticasted packets. 534 * XXX: there may be an interface in which the IPv4 multicast 535 * daemon is not interested... 536 */ 537 if (!ip_mrouter) 538 #endif 539 #endif 540 { 541 for (mifi = 0; mifi < nummifs; mifi++) { 542 if (mif6table[mifi].m6_ifp && 543 !(mif6table[mifi].m6_flags & MIFF_REGISTER)) { 544 sin6.sin6_family = AF_INET6; 545 sin6.sin6_addr = in6addr_any; 546 ifp = mif6table[mifi].m6_ifp; 547 if_mcast_op(ifp, SIOCDELMULTI, 548 sin6tocsa(&sin6)); 549 } 550 } 551 } 552 #ifdef notyet 553 memset((void *)qtable, 0, sizeof(qtable)); 554 memset((void *)tbftable, 0, sizeof(tbftable)); 555 #endif 556 memset((void *)mif6table, 0, sizeof(mif6table)); 557 nummifs = 0; 558 559 pim6 = 0; /* used to stub out/in pim specific code */ 560 561 callout_stop(&expire_upcalls_ch); 562 563 /* 564 * Free all multicast forwarding cache entries. 565 */ 566 for (i = 0; i < MF6CTBLSIZ; i++) { 567 rt = mf6ctable[i]; 568 while (rt) { 569 struct mf6c *frt; 570 571 for (rte = rt->mf6c_stall; rte != NULL; ) { 572 struct rtdetq *n = rte->next; 573 574 m_freem(rte->m); 575 free(rte, M_MRTABLE); 576 rte = n; 577 } 578 frt = rt; 579 rt = rt->mf6c_next; 580 free(frt, M_MRTABLE); 581 } 582 } 583 584 memset((void *)mf6ctable, 0, sizeof(mf6ctable)); 585 586 /* 587 * Reset register interface 588 */ 589 if (reg_mif_num != (mifi_t)-1) { 590 if_detach(&multicast_register_if6); 591 reg_mif_num = (mifi_t)-1; 592 } 593 594 ip6_mrouter = NULL; 595 ip6_mrouter_ver = 0; 596 597 splx(s); 598 599 #ifdef MRT6DEBUG 600 if (mrt6debug) 601 log(LOG_DEBUG, "ip6_mrouter_done\n"); 602 #endif 603 604 return 0; 605 } 606 607 void 608 ip6_mrouter_detach(struct ifnet *ifp) 609 { 610 struct rtdetq *rte; 611 struct mf6c *mfc; 612 mifi_t mifi; 613 int i; 614 615 if (ip6_mrouter == NULL) 616 return; 617 618 /* 619 * Delete a mif which points to ifp. 620 */ 621 for (mifi = 0; mifi < nummifs; mifi++) 622 if (mif6table[mifi].m6_ifp == ifp) 623 del_m6if(&mifi); 624 625 /* 626 * Clear rte->ifp of cache entries received on ifp. 627 */ 628 for (i = 0; i < MF6CTBLSIZ; i++) { 629 if (n6expire[i] == 0) 630 continue; 631 632 for (mfc = mf6ctable[i]; mfc != NULL; mfc = mfc->mf6c_next) { 633 for (rte = mfc->mf6c_stall; rte != NULL; rte = rte->next) { 634 if (rte->ifp == ifp) 635 rte->ifp = NULL; 636 } 637 } 638 } 639 } 640 641 642 /* 643 * Add a mif to the mif table 644 */ 645 static int 646 add_m6if(struct mif6ctl *mifcp) 647 { 648 struct mif6 *mifp; 649 struct ifnet *ifp; 650 struct sockaddr_in6 sin6; 651 int error, s; 652 #ifdef notyet 653 struct tbf *m_tbf = tbftable + mifcp->mif6c_mifi; 654 #endif 655 656 if (mifcp->mif6c_mifi >= MAXMIFS) 657 return EINVAL; 658 mifp = mif6table + mifcp->mif6c_mifi; 659 if (mifp->m6_ifp) 660 return EADDRINUSE; /* XXX: is it appropriate? */ 661 if (mifcp->mif6c_pifi == 0 || mifcp->mif6c_pifi >= if_indexlim) 662 return ENXIO; 663 /* 664 * XXX: some OSes can remove ifp and clear ifindex2ifnet[id] 665 * even for id between 0 and if_index. 666 */ 667 if ((ifp = ifindex2ifnet[mifcp->mif6c_pifi]) == NULL) 668 return ENXIO; 669 670 if (mifcp->mif6c_flags & MIFF_REGISTER) { 671 ifp = &multicast_register_if6; 672 673 if (reg_mif_num == (mifi_t)-1) { 674 strlcpy(ifp->if_xname, "register_mif", 675 sizeof(ifp->if_xname)); 676 ifp->if_flags |= IFF_LOOPBACK; 677 ifp->if_index = mifcp->mif6c_mifi; 678 reg_mif_num = mifcp->mif6c_mifi; 679 if_attach(ifp); 680 } 681 682 } /* if REGISTER */ 683 else { 684 /* Make sure the interface supports multicast */ 685 if ((ifp->if_flags & IFF_MULTICAST) == 0) 686 return EOPNOTSUPP; 687 688 s = splsoftnet(); 689 /* 690 * Enable promiscuous reception of all IPv6 multicasts 691 * from the interface. 692 */ 693 sin6.sin6_family = AF_INET6; 694 sin6.sin6_addr = in6addr_any; 695 error = if_mcast_op(ifp, SIOCADDMULTI, sin6tosa(&sin6)); 696 splx(s); 697 if (error) 698 return error; 699 } 700 701 s = splsoftnet(); 702 mifp->m6_flags = mifcp->mif6c_flags; 703 mifp->m6_ifp = ifp; 704 #ifdef notyet 705 /* scaling up here allows division by 1024 in critical code */ 706 mifp->m6_rate_limit = mifcp->mif6c_rate_limit * 1024 / 1000; 707 #endif 708 /* initialize per mif pkt counters */ 709 mifp->m6_pkt_in = 0; 710 mifp->m6_pkt_out = 0; 711 mifp->m6_bytes_in = 0; 712 mifp->m6_bytes_out = 0; 713 splx(s); 714 715 /* Adjust nummifs up if the mifi is higher than nummifs */ 716 if (nummifs <= mifcp->mif6c_mifi) 717 nummifs = mifcp->mif6c_mifi + 1; 718 719 #ifdef MRT6DEBUG 720 if (mrt6debug) 721 log(LOG_DEBUG, 722 "add_mif #%d, phyint %s\n", 723 mifcp->mif6c_mifi, ifp->if_xname); 724 #endif 725 726 return 0; 727 } 728 729 /* 730 * Delete a mif from the mif table 731 */ 732 static int 733 del_m6if(mifi_t *mifip) 734 { 735 struct mif6 *mifp = mif6table + *mifip; 736 mifi_t mifi; 737 struct ifnet *ifp; 738 struct sockaddr_in6 sin6; 739 int s; 740 741 if (*mifip >= nummifs) 742 return EINVAL; 743 if (mifp->m6_ifp == NULL) 744 return EINVAL; 745 746 s = splsoftnet(); 747 748 if (!(mifp->m6_flags & MIFF_REGISTER)) { 749 /* 750 * XXX: what if there is yet IPv4 multicast daemon 751 * using the interface? 752 */ 753 ifp = mifp->m6_ifp; 754 755 sin6.sin6_family = AF_INET6; 756 sin6.sin6_addr = in6addr_any; 757 if_mcast_op(ifp, SIOCDELMULTI, sin6tosa(&sin6)); 758 } else { 759 if (reg_mif_num != (mifi_t)-1) { 760 if_detach(&multicast_register_if6); 761 reg_mif_num = (mifi_t)-1; 762 } 763 } 764 765 #ifdef notyet 766 memset((void *)qtable[*mifip], 0, sizeof(qtable[*mifip])); 767 memset((void *)mifp->m6_tbf, 0, sizeof(*(mifp->m6_tbf))); 768 #endif 769 memset((void *)mifp, 0, sizeof (*mifp)); 770 771 /* Adjust nummifs down */ 772 for (mifi = nummifs; mifi > 0; mifi--) 773 if (mif6table[mifi - 1].m6_ifp) 774 break; 775 nummifs = mifi; 776 777 splx(s); 778 779 #ifdef MRT6DEBUG 780 if (mrt6debug) 781 log(LOG_DEBUG, "del_m6if %d, nummifs %d\n", *mifip, nummifs); 782 #endif 783 784 return 0; 785 } 786 787 /* 788 * Add an mfc entry 789 */ 790 static int 791 add_m6fc(struct mf6cctl *mfccp) 792 { 793 struct mf6c *rt; 794 u_long hash; 795 struct rtdetq *rte; 796 u_short nstl; 797 int s; 798 799 MF6CFIND(mfccp->mf6cc_origin.sin6_addr, 800 mfccp->mf6cc_mcastgrp.sin6_addr, rt); 801 802 /* If an entry already exists, just update the fields */ 803 if (rt) { 804 #ifdef MRT6DEBUG 805 if (mrt6debug & DEBUG_MFC) 806 log(LOG_DEBUG,"add_m6fc update o %s g %s p %x\n", 807 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 808 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 809 mfccp->mf6cc_parent); 810 #endif 811 812 s = splsoftnet(); 813 rt->mf6c_parent = mfccp->mf6cc_parent; 814 rt->mf6c_ifset = mfccp->mf6cc_ifset; 815 splx(s); 816 return 0; 817 } 818 819 /* 820 * Find the entry for which the upcall was made and update 821 */ 822 s = splsoftnet(); 823 hash = MF6CHASH(mfccp->mf6cc_origin.sin6_addr, 824 mfccp->mf6cc_mcastgrp.sin6_addr); 825 for (rt = mf6ctable[hash], nstl = 0; rt; rt = rt->mf6c_next) { 826 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 827 &mfccp->mf6cc_origin.sin6_addr) && 828 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 829 &mfccp->mf6cc_mcastgrp.sin6_addr) && 830 (rt->mf6c_stall != NULL)) { 831 832 if (nstl++) 833 log(LOG_ERR, 834 "add_m6fc: %s o %s g %s p %x dbx %p\n", 835 "multiple kernel entries", 836 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 837 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 838 mfccp->mf6cc_parent, rt->mf6c_stall); 839 840 #ifdef MRT6DEBUG 841 if (mrt6debug & DEBUG_MFC) 842 log(LOG_DEBUG, 843 "add_m6fc o %s g %s p %x dbg %p\n", 844 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 845 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 846 mfccp->mf6cc_parent, rt->mf6c_stall); 847 #endif 848 849 rt->mf6c_origin = mfccp->mf6cc_origin; 850 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 851 rt->mf6c_parent = mfccp->mf6cc_parent; 852 rt->mf6c_ifset = mfccp->mf6cc_ifset; 853 /* initialize pkt counters per src-grp */ 854 rt->mf6c_pkt_cnt = 0; 855 rt->mf6c_byte_cnt = 0; 856 rt->mf6c_wrong_if = 0; 857 858 rt->mf6c_expire = 0; /* Don't clean this guy up */ 859 n6expire[hash]--; 860 861 /* free packets Qed at the end of this entry */ 862 for (rte = rt->mf6c_stall; rte != NULL; ) { 863 struct rtdetq *n = rte->next; 864 if (rte->ifp) { 865 ip6_mdq(rte->m, rte->ifp, rt); 866 } 867 m_freem(rte->m); 868 #ifdef UPCALL_TIMING 869 collate(&(rte->t)); 870 #endif /* UPCALL_TIMING */ 871 free(rte, M_MRTABLE); 872 rte = n; 873 } 874 rt->mf6c_stall = NULL; 875 } 876 } 877 878 /* 879 * It is possible that an entry is being inserted without an upcall 880 */ 881 if (nstl == 0) { 882 #ifdef MRT6DEBUG 883 if (mrt6debug & DEBUG_MFC) 884 log(LOG_DEBUG, 885 "add_mfc no upcall h %ld o %s g %s p %x\n", 886 hash, 887 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 888 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 889 mfccp->mf6cc_parent); 890 #endif 891 892 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 893 894 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 895 &mfccp->mf6cc_origin.sin6_addr)&& 896 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 897 &mfccp->mf6cc_mcastgrp.sin6_addr)) { 898 899 rt->mf6c_origin = mfccp->mf6cc_origin; 900 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 901 rt->mf6c_parent = mfccp->mf6cc_parent; 902 rt->mf6c_ifset = mfccp->mf6cc_ifset; 903 /* initialize pkt counters per src-grp */ 904 rt->mf6c_pkt_cnt = 0; 905 rt->mf6c_byte_cnt = 0; 906 rt->mf6c_wrong_if = 0; 907 908 if (rt->mf6c_expire) 909 n6expire[hash]--; 910 rt->mf6c_expire = 0; 911 } 912 } 913 if (rt == NULL) { 914 /* no upcall, so make a new entry */ 915 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE, 916 M_NOWAIT); 917 if (rt == NULL) { 918 splx(s); 919 return ENOBUFS; 920 } 921 922 /* insert new entry at head of hash chain */ 923 rt->mf6c_origin = mfccp->mf6cc_origin; 924 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 925 rt->mf6c_parent = mfccp->mf6cc_parent; 926 rt->mf6c_ifset = mfccp->mf6cc_ifset; 927 /* initialize pkt counters per src-grp */ 928 rt->mf6c_pkt_cnt = 0; 929 rt->mf6c_byte_cnt = 0; 930 rt->mf6c_wrong_if = 0; 931 rt->mf6c_expire = 0; 932 rt->mf6c_stall = NULL; 933 934 /* link into table */ 935 rt->mf6c_next = mf6ctable[hash]; 936 mf6ctable[hash] = rt; 937 } 938 } 939 splx(s); 940 return 0; 941 } 942 943 #ifdef UPCALL_TIMING 944 /* 945 * collect delay statistics on the upcalls 946 */ 947 static void 948 collate(struct timeval *t) 949 { 950 u_long d; 951 struct timeval tp; 952 u_long delta; 953 954 GET_TIME(tp); 955 956 if (TV_LT(*t, tp)) 957 { 958 TV_DELTA(tp, *t, delta); 959 960 d = delta >> 10; 961 if (d > UPCALL_MAX) 962 d = UPCALL_MAX; 963 964 ++upcall_data[d]; 965 } 966 } 967 #endif /* UPCALL_TIMING */ 968 969 /* 970 * Delete an mfc entry 971 */ 972 static int 973 del_m6fc(struct mf6cctl *mfccp) 974 { 975 struct sockaddr_in6 origin; 976 struct sockaddr_in6 mcastgrp; 977 struct mf6c *rt; 978 struct mf6c **nptr; 979 u_long hash; 980 int s; 981 982 origin = mfccp->mf6cc_origin; 983 mcastgrp = mfccp->mf6cc_mcastgrp; 984 hash = MF6CHASH(origin.sin6_addr, mcastgrp.sin6_addr); 985 986 #ifdef MRT6DEBUG 987 if (mrt6debug & DEBUG_MFC) 988 log(LOG_DEBUG,"del_m6fc orig %s mcastgrp %s\n", 989 ip6_sprintf(&origin.sin6_addr), 990 ip6_sprintf(&mcastgrp.sin6_addr)); 991 #endif 992 993 s = splsoftnet(); 994 995 nptr = &mf6ctable[hash]; 996 while ((rt = *nptr) != NULL) { 997 if (IN6_ARE_ADDR_EQUAL(&origin.sin6_addr, 998 &rt->mf6c_origin.sin6_addr) && 999 IN6_ARE_ADDR_EQUAL(&mcastgrp.sin6_addr, 1000 &rt->mf6c_mcastgrp.sin6_addr) && 1001 rt->mf6c_stall == NULL) 1002 break; 1003 1004 nptr = &rt->mf6c_next; 1005 } 1006 if (rt == NULL) { 1007 splx(s); 1008 return EADDRNOTAVAIL; 1009 } 1010 1011 *nptr = rt->mf6c_next; 1012 free(rt, M_MRTABLE); 1013 1014 splx(s); 1015 1016 return 0; 1017 } 1018 1019 static int 1020 socket_send(struct socket *s, struct mbuf *mm, struct sockaddr_in6 *src) 1021 { 1022 if (s) { 1023 if (sbappendaddr(&s->so_rcv, 1024 (struct sockaddr *)src, mm, NULL) != 0) { 1025 sorwakeup(s); 1026 return 0; 1027 } 1028 } 1029 m_freem(mm); 1030 return -1; 1031 } 1032 1033 /* 1034 * IPv6 multicast forwarding function. This function assumes that the packet 1035 * pointed to by "ip6" has arrived on (or is about to be sent to) the interface 1036 * pointed to by "ifp", and the packet is to be relayed to other networks 1037 * that have members of the packet's destination IPv6 multicast group. 1038 * 1039 * The packet is returned unscathed to the caller, unless it is 1040 * erroneous, in which case a non-zero return value tells the caller to 1041 * discard it. 1042 */ 1043 1044 int 1045 ip6_mforward(struct ip6_hdr *ip6, struct ifnet *ifp, struct mbuf *m) 1046 { 1047 struct mf6c *rt; 1048 struct mif6 *mifp; 1049 struct mbuf *mm; 1050 int s; 1051 mifi_t mifi; 1052 struct sockaddr_in6 sin6; 1053 1054 #ifdef MRT6DEBUG 1055 if (mrt6debug & DEBUG_FORWARD) 1056 log(LOG_DEBUG, "ip6_mforward: src %s, dst %s, ifindex %d\n", 1057 ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst), 1058 ifp->if_index); 1059 #endif 1060 1061 /* 1062 * Don't forward a packet with Hop limit of zero or one, 1063 * or a packet destined to a local-only group. 1064 */ 1065 if (ip6->ip6_hlim <= 1 || IN6_IS_ADDR_MC_NODELOCAL(&ip6->ip6_dst) || 1066 IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst)) 1067 return 0; 1068 ip6->ip6_hlim--; 1069 1070 /* 1071 * Source address check: do not forward packets with unspecified 1072 * source. It was discussed in July 2000, on ipngwg mailing list. 1073 * This is rather more serious than unicast cases, because some 1074 * MLD packets can be sent with the unspecified source address 1075 * (although such packets must normally set the hop limit field to 1). 1076 */ 1077 if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) { 1078 IP6_STATINC(IP6_STAT_CANTFORWARD); 1079 if (ip6_log_time + ip6_log_interval < time_second) { 1080 ip6_log_time = time_second; 1081 log(LOG_DEBUG, 1082 "cannot forward " 1083 "from %s to %s nxt %d received on %s\n", 1084 ip6_sprintf(&ip6->ip6_src), 1085 ip6_sprintf(&ip6->ip6_dst), 1086 ip6->ip6_nxt, 1087 m->m_pkthdr.rcvif ? 1088 if_name(m->m_pkthdr.rcvif) : "?"); 1089 } 1090 return 0; 1091 } 1092 1093 /* 1094 * Determine forwarding mifs from the forwarding cache table 1095 */ 1096 s = splsoftnet(); 1097 MF6CFIND(ip6->ip6_src, ip6->ip6_dst, rt); 1098 1099 /* Entry exists, so forward if necessary */ 1100 if (rt) { 1101 splx(s); 1102 return (ip6_mdq(m, ifp, rt)); 1103 } else { 1104 /* 1105 * If we don't have a route for packet's origin, 1106 * Make a copy of the packet & 1107 * send message to routing daemon 1108 */ 1109 1110 struct mbuf *mb0; 1111 struct rtdetq *rte; 1112 u_long hash; 1113 /* int i, npkts;*/ 1114 #ifdef UPCALL_TIMING 1115 struct timeval tp; 1116 1117 GET_TIME(tp); 1118 #endif /* UPCALL_TIMING */ 1119 1120 mrt6stat.mrt6s_no_route++; 1121 #ifdef MRT6DEBUG 1122 if (mrt6debug & (DEBUG_FORWARD | DEBUG_MFC)) 1123 log(LOG_DEBUG, "ip6_mforward: no rte s %s g %s\n", 1124 ip6_sprintf(&ip6->ip6_src), 1125 ip6_sprintf(&ip6->ip6_dst)); 1126 #endif 1127 1128 /* 1129 * Allocate mbufs early so that we don't do extra work if we 1130 * are just going to fail anyway. 1131 */ 1132 rte = (struct rtdetq *)malloc(sizeof(*rte), M_MRTABLE, 1133 M_NOWAIT); 1134 if (rte == NULL) { 1135 splx(s); 1136 return ENOBUFS; 1137 } 1138 mb0 = m_copy(m, 0, M_COPYALL); 1139 /* 1140 * Pullup packet header if needed before storing it, 1141 * as other references may modify it in the meantime. 1142 */ 1143 if (mb0 && 1144 (M_READONLY(mb0) || mb0->m_len < sizeof(struct ip6_hdr))) 1145 mb0 = m_pullup(mb0, sizeof(struct ip6_hdr)); 1146 if (mb0 == NULL) { 1147 free(rte, M_MRTABLE); 1148 splx(s); 1149 return ENOBUFS; 1150 } 1151 1152 /* is there an upcall waiting for this packet? */ 1153 hash = MF6CHASH(ip6->ip6_src, ip6->ip6_dst); 1154 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 1155 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, 1156 &rt->mf6c_origin.sin6_addr) && 1157 IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, 1158 &rt->mf6c_mcastgrp.sin6_addr) && 1159 (rt->mf6c_stall != NULL)) 1160 break; 1161 } 1162 1163 if (rt == NULL) { 1164 struct mrt6msg *im; 1165 struct omrt6msg *oim; 1166 1167 /* no upcall, so make a new entry */ 1168 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE, 1169 M_NOWAIT); 1170 if (rt == NULL) { 1171 free(rte, M_MRTABLE); 1172 m_freem(mb0); 1173 splx(s); 1174 return ENOBUFS; 1175 } 1176 /* 1177 * Make a copy of the header to send to the user 1178 * level process 1179 */ 1180 mm = m_copy(mb0, 0, sizeof(struct ip6_hdr)); 1181 1182 if (mm == NULL) { 1183 free(rte, M_MRTABLE); 1184 m_freem(mb0); 1185 free(rt, M_MRTABLE); 1186 splx(s); 1187 return ENOBUFS; 1188 } 1189 1190 /* 1191 * Send message to routing daemon 1192 */ 1193 sockaddr_in6_init(&sin6, &ip6->ip6_src, 0, 0, 0); 1194 1195 im = NULL; 1196 oim = NULL; 1197 switch (ip6_mrouter_ver) { 1198 case MRT6_OINIT: 1199 oim = mtod(mm, struct omrt6msg *); 1200 oim->im6_msgtype = MRT6MSG_NOCACHE; 1201 oim->im6_mbz = 0; 1202 break; 1203 case MRT6_INIT: 1204 im = mtod(mm, struct mrt6msg *); 1205 im->im6_msgtype = MRT6MSG_NOCACHE; 1206 im->im6_mbz = 0; 1207 break; 1208 default: 1209 free(rte, M_MRTABLE); 1210 m_freem(mb0); 1211 free(rt, M_MRTABLE); 1212 splx(s); 1213 return EINVAL; 1214 } 1215 1216 #ifdef MRT6DEBUG 1217 if (mrt6debug & DEBUG_FORWARD) 1218 log(LOG_DEBUG, 1219 "getting the iif info in the kernel\n"); 1220 #endif 1221 1222 for (mifp = mif6table, mifi = 0; 1223 mifi < nummifs && mifp->m6_ifp != ifp; 1224 mifp++, mifi++) 1225 ; 1226 1227 switch (ip6_mrouter_ver) { 1228 case MRT6_OINIT: 1229 oim->im6_mif = mifi; 1230 break; 1231 case MRT6_INIT: 1232 im->im6_mif = mifi; 1233 break; 1234 } 1235 1236 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1237 log(LOG_WARNING, "ip6_mforward: ip6_mrouter " 1238 "socket queue full\n"); 1239 mrt6stat.mrt6s_upq_sockfull++; 1240 free(rte, M_MRTABLE); 1241 m_freem(mb0); 1242 free(rt, M_MRTABLE); 1243 splx(s); 1244 return ENOBUFS; 1245 } 1246 1247 mrt6stat.mrt6s_upcalls++; 1248 1249 /* insert new entry at head of hash chain */ 1250 memset(rt, 0, sizeof(*rt)); 1251 sockaddr_in6_init(&rt->mf6c_origin, &ip6->ip6_src, 1252 0, 0, 0); 1253 sockaddr_in6_init(&rt->mf6c_mcastgrp, &ip6->ip6_dst, 1254 0, 0, 0); 1255 rt->mf6c_expire = UPCALL_EXPIRE; 1256 n6expire[hash]++; 1257 rt->mf6c_parent = MF6C_INCOMPLETE_PARENT; 1258 1259 /* link into table */ 1260 rt->mf6c_next = mf6ctable[hash]; 1261 mf6ctable[hash] = rt; 1262 /* Add this entry to the end of the queue */ 1263 rt->mf6c_stall = rte; 1264 } else { 1265 /* determine if q has overflowed */ 1266 struct rtdetq **p; 1267 int npkts = 0; 1268 1269 for (p = &rt->mf6c_stall; *p != NULL; p = &(*p)->next) 1270 if (++npkts > MAX_UPQ6) { 1271 mrt6stat.mrt6s_upq_ovflw++; 1272 free(rte, M_MRTABLE); 1273 m_freem(mb0); 1274 splx(s); 1275 return 0; 1276 } 1277 1278 /* Add this entry to the end of the queue */ 1279 *p = rte; 1280 } 1281 1282 rte->next = NULL; 1283 rte->m = mb0; 1284 rte->ifp = ifp; 1285 #ifdef UPCALL_TIMING 1286 rte->t = tp; 1287 #endif /* UPCALL_TIMING */ 1288 1289 splx(s); 1290 1291 return 0; 1292 } 1293 } 1294 1295 /* 1296 * Clean up cache entries if upcalls are not serviced 1297 * Call from the Slow Timeout mechanism, every 0.25 seconds. 1298 */ 1299 static void 1300 expire_upcalls(void *unused) 1301 { 1302 struct rtdetq *rte; 1303 struct mf6c *mfc, **nptr; 1304 int i; 1305 1306 mutex_enter(softnet_lock); 1307 KERNEL_LOCK(1, NULL); 1308 1309 for (i = 0; i < MF6CTBLSIZ; i++) { 1310 if (n6expire[i] == 0) 1311 continue; 1312 nptr = &mf6ctable[i]; 1313 while ((mfc = *nptr) != NULL) { 1314 rte = mfc->mf6c_stall; 1315 /* 1316 * Skip real cache entries 1317 * Make sure it wasn't marked to not expire (shouldn't happen) 1318 * If it expires now 1319 */ 1320 if (rte != NULL && 1321 mfc->mf6c_expire != 0 && 1322 --mfc->mf6c_expire == 0) { 1323 #ifdef MRT6DEBUG 1324 if (mrt6debug & DEBUG_EXPIRE) 1325 log(LOG_DEBUG, "expire_upcalls: expiring (%s %s)\n", 1326 ip6_sprintf(&mfc->mf6c_origin.sin6_addr), 1327 ip6_sprintf(&mfc->mf6c_mcastgrp.sin6_addr)); 1328 #endif 1329 /* 1330 * drop all the packets 1331 * free the mbuf with the pkt, if, timing info 1332 */ 1333 do { 1334 struct rtdetq *n = rte->next; 1335 m_freem(rte->m); 1336 free(rte, M_MRTABLE); 1337 rte = n; 1338 } while (rte != NULL); 1339 mrt6stat.mrt6s_cache_cleanups++; 1340 n6expire[i]--; 1341 1342 *nptr = mfc->mf6c_next; 1343 free(mfc, M_MRTABLE); 1344 } else { 1345 nptr = &mfc->mf6c_next; 1346 } 1347 } 1348 } 1349 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 1350 expire_upcalls, NULL); 1351 1352 KERNEL_UNLOCK_ONE(NULL); 1353 mutex_exit(softnet_lock); 1354 } 1355 1356 /* 1357 * Packet forwarding routine once entry in the cache is made 1358 */ 1359 static int 1360 ip6_mdq(struct mbuf *m, struct ifnet *ifp, struct mf6c *rt) 1361 { 1362 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 1363 mifi_t mifi, iif; 1364 struct mif6 *mifp; 1365 int plen = m->m_pkthdr.len; 1366 struct in6_addr src0, dst0; /* copies for local work */ 1367 u_int32_t iszone, idzone, oszone, odzone; 1368 int error = 0; 1369 1370 /* 1371 * Macro to send packet on mif. Since RSVP packets don't get counted on 1372 * input, they shouldn't get counted on output, so statistics keeping is 1373 * separate. 1374 */ 1375 1376 #define MC6_SEND(ip6, mifp, m) do { \ 1377 if ((mifp)->m6_flags & MIFF_REGISTER) \ 1378 register_send((ip6), (mifp), (m)); \ 1379 else \ 1380 phyint_send((ip6), (mifp), (m)); \ 1381 } while (/*CONSTCOND*/ 0) 1382 1383 /* 1384 * Don't forward if it didn't arrive from the parent mif 1385 * for its origin. 1386 */ 1387 mifi = rt->mf6c_parent; 1388 if ((mifi >= nummifs) || (mif6table[mifi].m6_ifp != ifp)) { 1389 /* came in the wrong interface */ 1390 #ifdef MRT6DEBUG 1391 if (mrt6debug & DEBUG_FORWARD) 1392 log(LOG_DEBUG, 1393 "wrong if: ifid %d mifi %d mififid %x\n", 1394 ifp->if_index, mifi, 1395 mif6table[mifi].m6_ifp ? 1396 mif6table[mifi].m6_ifp->if_index : -1); 1397 #endif 1398 mrt6stat.mrt6s_wrong_if++; 1399 rt->mf6c_wrong_if++; 1400 /* 1401 * If we are doing PIM processing, and we are forwarding 1402 * packets on this interface, send a message to the 1403 * routing daemon. 1404 */ 1405 /* have to make sure this is a valid mif */ 1406 if (mifi < nummifs && mif6table[mifi].m6_ifp) 1407 if (pim6 && (m->m_flags & M_LOOP) == 0) { 1408 /* 1409 * Check the M_LOOP flag to avoid an 1410 * unnecessary PIM assert. 1411 * XXX: M_LOOP is an ad-hoc hack... 1412 */ 1413 struct sockaddr_in6 sin6; 1414 1415 struct mbuf *mm; 1416 struct mrt6msg *im; 1417 struct omrt6msg *oim; 1418 1419 mm = m_copy(m, 0, sizeof(struct ip6_hdr)); 1420 if (mm && 1421 (M_READONLY(mm) || 1422 mm->m_len < sizeof(struct ip6_hdr))) 1423 mm = m_pullup(mm, sizeof(struct ip6_hdr)); 1424 if (mm == NULL) 1425 return ENOBUFS; 1426 1427 oim = NULL; 1428 im = NULL; 1429 switch (ip6_mrouter_ver) { 1430 case MRT6_OINIT: 1431 oim = mtod(mm, struct omrt6msg *); 1432 oim->im6_msgtype = MRT6MSG_WRONGMIF; 1433 oim->im6_mbz = 0; 1434 break; 1435 case MRT6_INIT: 1436 im = mtod(mm, struct mrt6msg *); 1437 im->im6_msgtype = MRT6MSG_WRONGMIF; 1438 im->im6_mbz = 0; 1439 break; 1440 default: 1441 m_freem(mm); 1442 return EINVAL; 1443 } 1444 1445 for (mifp = mif6table, iif = 0; 1446 iif < nummifs && mifp && 1447 mifp->m6_ifp != ifp; 1448 mifp++, iif++) 1449 ; 1450 1451 memset(&sin6, 0, sizeof(sin6)); 1452 sin6.sin6_len = sizeof(sin6); 1453 sin6.sin6_family = AF_INET6; 1454 switch (ip6_mrouter_ver) { 1455 case MRT6_OINIT: 1456 oim->im6_mif = iif; 1457 sin6.sin6_addr = oim->im6_src; 1458 break; 1459 case MRT6_INIT: 1460 im->im6_mif = iif; 1461 sin6.sin6_addr = im->im6_src; 1462 break; 1463 } 1464 1465 mrt6stat.mrt6s_upcalls++; 1466 1467 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1468 #ifdef MRT6DEBUG 1469 if (mrt6debug) 1470 log(LOG_WARNING, "mdq, ip6_mrouter socket queue full\n"); 1471 #endif 1472 ++mrt6stat.mrt6s_upq_sockfull; 1473 return ENOBUFS; 1474 } /* if socket Q full */ 1475 } /* if PIM */ 1476 return 0; 1477 } /* if wrong iif */ 1478 1479 /* If I sourced this packet, it counts as output, else it was input. */ 1480 if (m->m_pkthdr.rcvif == NULL) { 1481 /* XXX: is rcvif really NULL when output?? */ 1482 mif6table[mifi].m6_pkt_out++; 1483 mif6table[mifi].m6_bytes_out += plen; 1484 } else { 1485 mif6table[mifi].m6_pkt_in++; 1486 mif6table[mifi].m6_bytes_in += plen; 1487 } 1488 rt->mf6c_pkt_cnt++; 1489 rt->mf6c_byte_cnt += plen; 1490 1491 /* 1492 * For each mif, forward a copy of the packet if there are group 1493 * members downstream on the interface. 1494 */ 1495 src0 = ip6->ip6_src; 1496 dst0 = ip6->ip6_dst; 1497 if ((error = in6_setscope(&src0, ifp, &iszone)) != 0 || 1498 (error = in6_setscope(&dst0, ifp, &idzone)) != 0) { 1499 IP6_STATINC(IP6_STAT_BADSCOPE); 1500 return (error); 1501 } 1502 for (mifp = mif6table, mifi = 0; mifi < nummifs; mifp++, mifi++) 1503 if (IF_ISSET(mifi, &rt->mf6c_ifset)) { 1504 if (mif6table[mifi].m6_ifp == NULL) 1505 continue; 1506 /* 1507 * check if the outgoing packet is going to break 1508 * a scope boundary. 1509 * XXX: For packets through PIM register tunnel 1510 * interface, we believe the routing daemon. 1511 */ 1512 if ((mif6table[rt->mf6c_parent].m6_flags & 1513 MIFF_REGISTER) == 0 && 1514 (mif6table[mifi].m6_flags & MIFF_REGISTER) == 0) { 1515 if (in6_setscope(&src0, mif6table[mifi].m6_ifp, 1516 &oszone) || 1517 in6_setscope(&dst0, mif6table[mifi].m6_ifp, 1518 &odzone) || 1519 iszone != oszone || idzone != odzone) { 1520 IP6_STATINC(IP6_STAT_BADSCOPE); 1521 continue; 1522 } 1523 } 1524 1525 mifp->m6_pkt_out++; 1526 mifp->m6_bytes_out += plen; 1527 MC6_SEND(ip6, mifp, m); 1528 } 1529 return 0; 1530 } 1531 1532 static void 1533 phyint_send(struct ip6_hdr *ip6, struct mif6 *mifp, struct mbuf *m) 1534 { 1535 struct mbuf *mb_copy; 1536 struct ifnet *ifp = mifp->m6_ifp; 1537 int error __mrt6debugused = 0; 1538 int s; 1539 static struct route ro; 1540 struct in6_multi *in6m; 1541 struct sockaddr_in6 dst6; 1542 u_long linkmtu; 1543 1544 s = splsoftnet(); 1545 /* 1546 * Make a new reference to the packet; make sure that 1547 * the IPv6 header is actually copied, not just referenced, 1548 * so that ip6_output() only scribbles on the copy. 1549 */ 1550 mb_copy = m_copy(m, 0, M_COPYALL); 1551 if (mb_copy && 1552 (M_READONLY(mb_copy) || mb_copy->m_len < sizeof(struct ip6_hdr))) 1553 mb_copy = m_pullup(mb_copy, sizeof(struct ip6_hdr)); 1554 if (mb_copy == NULL) { 1555 splx(s); 1556 return; 1557 } 1558 /* set MCAST flag to the outgoing packet */ 1559 mb_copy->m_flags |= M_MCAST; 1560 1561 /* 1562 * If we sourced the packet, call ip6_output since we may divide 1563 * the packet into fragments when the packet is too big for the 1564 * outgoing interface. 1565 * Otherwise, we can simply send the packet to the interface 1566 * sending queue. 1567 */ 1568 if (m->m_pkthdr.rcvif == NULL) { 1569 struct ip6_moptions im6o; 1570 1571 im6o.im6o_multicast_ifp = ifp; 1572 /* XXX: ip6_output will override ip6->ip6_hlim */ 1573 im6o.im6o_multicast_hlim = ip6->ip6_hlim; 1574 im6o.im6o_multicast_loop = 1; 1575 error = ip6_output(mb_copy, NULL, &ro, IPV6_FORWARDING, 1576 &im6o, NULL, NULL); 1577 1578 #ifdef MRT6DEBUG 1579 if (mrt6debug & DEBUG_XMIT) 1580 log(LOG_DEBUG, "phyint_send on mif %td err %d\n", 1581 mifp - mif6table, error); 1582 #endif 1583 splx(s); 1584 return; 1585 } 1586 1587 /* 1588 * If we belong to the destination multicast group 1589 * on the outgoing interface, loop back a copy. 1590 */ 1591 /* 1592 * Does not have to check source info, as it's alreay covered by 1593 * ip6_input 1594 */ 1595 sockaddr_in6_init(&dst6, &ip6->ip6_dst, 0, 0, 0); 1596 1597 IN6_LOOKUP_MULTI(ip6->ip6_dst, ifp, in6m); 1598 if (in6m != NULL) { 1599 ip6_mloopback(ifp, m, 1600 satocsin6(rtcache_getdst(&ro))); 1601 } 1602 1603 /* 1604 * Put the packet into the sending queue of the outgoing interface 1605 * if it would fit in the MTU of the interface. 1606 */ 1607 linkmtu = IN6_LINKMTU(ifp); 1608 if (mb_copy->m_pkthdr.len <= linkmtu || linkmtu < IPV6_MMTU) { 1609 /* 1610 * We could call if_output directly here, but we use 1611 * nd6_output on purpose to see if IPv6 operation is allowed 1612 * on the interface. 1613 */ 1614 error = nd6_output(ifp, ifp, mb_copy, &dst6, NULL); 1615 #ifdef MRT6DEBUG 1616 if (mrt6debug & DEBUG_XMIT) 1617 log(LOG_DEBUG, "phyint_send on mif %td err %d\n", 1618 mifp - mif6table, error); 1619 #endif 1620 } else { 1621 /* 1622 * pMTU discovery is intentionally disabled by default, since 1623 * various router may notify pMTU in multicast, which can be 1624 * a DDoS to a router 1625 */ 1626 if (ip6_mcast_pmtu) 1627 icmp6_error(mb_copy, ICMP6_PACKET_TOO_BIG, 0, linkmtu); 1628 else { 1629 #ifdef MRT6DEBUG 1630 if (mrt6debug & DEBUG_XMIT) 1631 log(LOG_DEBUG, 1632 "phyint_send: packet too big on %s o %s g %s" 1633 " size %d(discarded)\n", 1634 if_name(ifp), 1635 ip6_sprintf(&ip6->ip6_src), 1636 ip6_sprintf(&ip6->ip6_dst), 1637 mb_copy->m_pkthdr.len); 1638 #endif /* MRT6DEBUG */ 1639 m_freem(mb_copy); /* simply discard the packet */ 1640 } 1641 } 1642 1643 splx(s); 1644 } 1645 1646 static int 1647 register_send(struct ip6_hdr *ip6, struct mif6 *mif, struct mbuf *m) 1648 { 1649 struct mbuf *mm; 1650 int i, len = m->m_pkthdr.len; 1651 struct sockaddr_in6 sin6; 1652 struct mrt6msg *im6; 1653 1654 #ifdef MRT6DEBUG 1655 if (mrt6debug) 1656 log(LOG_DEBUG, "** IPv6 register_send **\n src %s dst %s\n", 1657 ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst)); 1658 #endif 1659 PIM6_STATINC(PIM6_STAT_SND_REGISTERS); 1660 1661 /* Make a copy of the packet to send to the user level process */ 1662 MGETHDR(mm, M_DONTWAIT, MT_HEADER); 1663 if (mm == NULL) 1664 return ENOBUFS; 1665 mm->m_data += max_linkhdr; 1666 mm->m_len = sizeof(struct ip6_hdr); 1667 1668 if ((mm->m_next = m_copy(m, 0, M_COPYALL)) == NULL) { 1669 m_freem(mm); 1670 return ENOBUFS; 1671 } 1672 i = MHLEN - M_LEADINGSPACE(mm); 1673 if (i > len) 1674 i = len; 1675 mm = m_pullup(mm, i); 1676 if (mm == NULL) 1677 return ENOBUFS; 1678 /* TODO: check it! */ 1679 mm->m_pkthdr.len = len + sizeof(struct ip6_hdr); 1680 1681 /* 1682 * Send message to routing daemon 1683 */ 1684 sockaddr_in6_init(&sin6, &ip6->ip6_src, 0, 0, 0); 1685 1686 im6 = mtod(mm, struct mrt6msg *); 1687 im6->im6_msgtype = MRT6MSG_WHOLEPKT; 1688 im6->im6_mbz = 0; 1689 1690 im6->im6_mif = mif - mif6table; 1691 1692 /* iif info is not given for reg. encap.n */ 1693 mrt6stat.mrt6s_upcalls++; 1694 1695 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1696 #ifdef MRT6DEBUG 1697 if (mrt6debug) 1698 log(LOG_WARNING, 1699 "register_send: ip6_mrouter socket queue full\n"); 1700 #endif 1701 ++mrt6stat.mrt6s_upq_sockfull; 1702 return ENOBUFS; 1703 } 1704 return 0; 1705 } 1706 1707 /* 1708 * PIM sparse mode hook 1709 * Receives the pim control messages, and passes them up to the listening 1710 * socket, using rip6_input. 1711 * The only message processed is the REGISTER pim message; the pim header 1712 * is stripped off, and the inner packet is passed to register_mforward. 1713 */ 1714 int 1715 pim6_input(struct mbuf **mp, int *offp, int proto) 1716 { 1717 struct pim *pim; /* pointer to a pim struct */ 1718 struct ip6_hdr *ip6 __mrt6debugused; 1719 int pimlen; 1720 struct mbuf *m = *mp; 1721 int minlen; 1722 int off = *offp; 1723 1724 PIM6_STATINC(PIM6_STAT_RCV_TOTAL); 1725 1726 ip6 = mtod(m, struct ip6_hdr *); 1727 pimlen = m->m_pkthdr.len - *offp; 1728 1729 /* 1730 * Validate lengths 1731 */ 1732 if (pimlen < PIM_MINLEN) { 1733 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1734 #ifdef MRT6DEBUG 1735 if (mrt6debug & DEBUG_PIM) 1736 log(LOG_DEBUG,"pim6_input: PIM packet too short\n"); 1737 #endif 1738 m_freem(m); 1739 return (IPPROTO_DONE); 1740 } 1741 1742 /* 1743 * if the packet is at least as big as a REGISTER, go ahead 1744 * and grab the PIM REGISTER header size, to avoid another 1745 * possible m_pullup() later. 1746 * 1747 * PIM_MINLEN == pimhdr + u_int32 == 8 1748 * PIM6_REG_MINLEN == pimhdr + reghdr + eip6hdr == 4 + 4 + 40 1749 */ 1750 minlen = (pimlen >= PIM6_REG_MINLEN) ? PIM6_REG_MINLEN : PIM_MINLEN; 1751 1752 /* 1753 * Make sure that the IP6 and PIM headers in contiguous memory, and 1754 * possibly the PIM REGISTER header 1755 */ 1756 IP6_EXTHDR_GET(pim, struct pim *, m, off, minlen); 1757 if (pim == NULL) { 1758 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1759 return IPPROTO_DONE; 1760 } 1761 1762 /* PIM version check */ 1763 if (pim->pim_ver != PIM_VERSION) { 1764 PIM6_STATINC(PIM6_STAT_RCV_BADVERSION); 1765 #ifdef MRT6DEBUG 1766 log(LOG_ERR, 1767 "pim6_input: incorrect version %d, expecting %d\n", 1768 pim->pim_ver, PIM_VERSION); 1769 #endif 1770 m_freem(m); 1771 return (IPPROTO_DONE); 1772 } 1773 1774 #define PIM6_CHECKSUM 1775 #ifdef PIM6_CHECKSUM 1776 { 1777 int cksumlen; 1778 1779 /* 1780 * Validate checksum. 1781 * If PIM REGISTER, exclude the data packet 1782 */ 1783 if (pim->pim_type == PIM_REGISTER) 1784 cksumlen = PIM_MINLEN; 1785 else 1786 cksumlen = pimlen; 1787 1788 if (in6_cksum(m, IPPROTO_PIM, off, cksumlen)) { 1789 PIM6_STATINC(PIM6_STAT_RCV_BADSUM); 1790 #ifdef MRT6DEBUG 1791 if (mrt6debug & DEBUG_PIM) 1792 log(LOG_DEBUG, 1793 "pim6_input: invalid checksum\n"); 1794 #endif 1795 m_freem(m); 1796 return (IPPROTO_DONE); 1797 } 1798 } 1799 #endif /* PIM_CHECKSUM */ 1800 1801 if (pim->pim_type == PIM_REGISTER) { 1802 /* 1803 * since this is a REGISTER, we'll make a copy of the register 1804 * headers ip6+pim+u_int32_t+encap_ip6, to be passed up to the 1805 * routing daemon. 1806 */ 1807 static const struct sockaddr_in6 dst = { 1808 .sin6_len = sizeof(dst), 1809 .sin6_family = AF_INET6, 1810 }; 1811 1812 struct mbuf *mcp; 1813 struct ip6_hdr *eip6; 1814 u_int32_t *reghdr; 1815 1816 PIM6_STATINC(PIM6_STAT_RCV_REGISTERS); 1817 1818 if ((reg_mif_num >= nummifs) || (reg_mif_num == (mifi_t) -1)) { 1819 #ifdef MRT6DEBUG 1820 if (mrt6debug & DEBUG_PIM) 1821 log(LOG_DEBUG, 1822 "pim6_input: register mif not set: %d\n", 1823 reg_mif_num); 1824 #endif 1825 m_freem(m); 1826 return (IPPROTO_DONE); 1827 } 1828 1829 reghdr = (u_int32_t *)(pim + 1); 1830 1831 if ((ntohl(*reghdr) & PIM_NULL_REGISTER)) 1832 goto pim6_input_to_daemon; 1833 1834 /* 1835 * Validate length 1836 */ 1837 if (pimlen < PIM6_REG_MINLEN) { 1838 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1839 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1840 #ifdef MRT6DEBUG 1841 log(LOG_ERR, 1842 "pim6_input: register packet size too " 1843 "small %d from %s\n", 1844 pimlen, ip6_sprintf(&ip6->ip6_src)); 1845 #endif 1846 m_freem(m); 1847 return (IPPROTO_DONE); 1848 } 1849 1850 eip6 = (struct ip6_hdr *) (reghdr + 1); 1851 #ifdef MRT6DEBUG 1852 if (mrt6debug & DEBUG_PIM) 1853 log(LOG_DEBUG, 1854 "pim6_input[register], eip6: %s -> %s, " 1855 "eip6 plen %d\n", 1856 ip6_sprintf(&eip6->ip6_src), 1857 ip6_sprintf(&eip6->ip6_dst), 1858 ntohs(eip6->ip6_plen)); 1859 #endif 1860 1861 /* verify the version number of the inner packet */ 1862 if ((eip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) { 1863 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1864 #ifdef MRT6DEBUG 1865 log(LOG_DEBUG, "pim6_input: invalid IP version (%d) " 1866 "of the inner packet\n", 1867 (eip6->ip6_vfc & IPV6_VERSION)); 1868 #endif 1869 m_freem(m); 1870 return (IPPROTO_NONE); 1871 } 1872 1873 /* verify the inner packet is destined to a mcast group */ 1874 if (!IN6_IS_ADDR_MULTICAST(&eip6->ip6_dst)) { 1875 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1876 #ifdef MRT6DEBUG 1877 if (mrt6debug & DEBUG_PIM) 1878 log(LOG_DEBUG, 1879 "pim6_input: inner packet of register " 1880 "is not multicast %s\n", 1881 ip6_sprintf(&eip6->ip6_dst)); 1882 #endif 1883 m_freem(m); 1884 return (IPPROTO_DONE); 1885 } 1886 1887 /* 1888 * make a copy of the whole header to pass to the daemon later. 1889 */ 1890 mcp = m_copy(m, 0, off + PIM6_REG_MINLEN); 1891 if (mcp == NULL) { 1892 #ifdef MRT6DEBUG 1893 log(LOG_ERR, 1894 "pim6_input: pim register: " 1895 "could not copy register head\n"); 1896 #endif 1897 m_freem(m); 1898 return (IPPROTO_DONE); 1899 } 1900 1901 /* 1902 * forward the inner ip6 packet; point m_data at the inner ip6. 1903 */ 1904 m_adj(m, off + PIM_MINLEN); 1905 #ifdef MRT6DEBUG 1906 if (mrt6debug & DEBUG_PIM) { 1907 log(LOG_DEBUG, 1908 "pim6_input: forwarding decapsulated register: " 1909 "src %s, dst %s, mif %d\n", 1910 ip6_sprintf(&eip6->ip6_src), 1911 ip6_sprintf(&eip6->ip6_dst), 1912 reg_mif_num); 1913 } 1914 #endif 1915 1916 looutput(mif6table[reg_mif_num].m6_ifp, m, 1917 (struct sockaddr *)__UNCONST(&dst), NULL); 1918 1919 /* prepare the register head to send to the mrouting daemon */ 1920 m = mcp; 1921 } 1922 1923 /* 1924 * Pass the PIM message up to the daemon; if it is a register message 1925 * pass the 'head' only up to the daemon. This includes the 1926 * encapsulator ip6 header, pim header, register header and the 1927 * encapsulated ip6 header. 1928 */ 1929 pim6_input_to_daemon: 1930 rip6_input(&m, offp, proto); 1931 return (IPPROTO_DONE); 1932 } 1933 1934 static int 1935 sysctl_net_inet6_pim6_stats(SYSCTLFN_ARGS) 1936 { 1937 1938 return (NETSTAT_SYSCTL(pim6stat_percpu, PIM6_NSTATS)); 1939 } 1940 1941 static void 1942 sysctl_net_inet6_pim6_setup(struct sysctllog **clog) 1943 { 1944 sysctl_createv(clog, 0, NULL, NULL, 1945 CTLFLAG_PERMANENT, 1946 CTLTYPE_NODE, "net", NULL, 1947 NULL, 0, NULL, 0, 1948 CTL_NET, CTL_EOL); 1949 sysctl_createv(clog, 0, NULL, NULL, 1950 CTLFLAG_PERMANENT, 1951 CTLTYPE_NODE, "inet6", NULL, 1952 NULL, 0, NULL, 0, 1953 CTL_NET, PF_INET6, CTL_EOL); 1954 sysctl_createv(clog, 0, NULL, NULL, 1955 CTLFLAG_PERMANENT, 1956 CTLTYPE_NODE, "pim6", 1957 SYSCTL_DESCR("PIMv6 settings"), 1958 NULL, 0, NULL, 0, 1959 CTL_NET, PF_INET6, IPPROTO_PIM, CTL_EOL); 1960 1961 sysctl_createv(clog, 0, NULL, NULL, 1962 CTLFLAG_PERMANENT, 1963 CTLTYPE_STRUCT, "stats", 1964 SYSCTL_DESCR("PIMv6 statistics"), 1965 sysctl_net_inet6_pim6_stats, 0, NULL, 0, 1966 CTL_NET, PF_INET6, IPPROTO_PIM, PIM6CTL_STATS, 1967 CTL_EOL); 1968 } 1969