1 /* $NetBSD: ip6_mroute.c,v 1.65 2005/08/28 21:03:18 rpaulo 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 1.65 2005/08/28 21:03:18 rpaulo 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> 143 144 #include <netinet/in.h> 145 #include <netinet/in_var.h> 146 #ifdef MULTICAST_PMTUD 147 #include <netinet/icmp6.h> 148 #endif 149 150 #include <netinet/ip6.h> 151 #include <netinet6/ip6_var.h> 152 #include <netinet6/ip6_mroute.h> 153 #include <netinet6/pim6.h> 154 #include <netinet6/pim6_var.h> 155 #include <netinet6/nd6.h> 156 157 #include <net/net_osdep.h> 158 159 static int ip6_mdq __P((struct mbuf *, struct ifnet *, struct mf6c *)); 160 static void phyint_send __P((struct ip6_hdr *, struct mif6 *, struct mbuf *)); 161 162 static int set_pim6 __P((int *)); 163 static int get_pim6 __P((struct mbuf *)); 164 static int socket_send __P((struct socket *, struct mbuf *, 165 struct sockaddr_in6 *)); 166 static int register_send __P((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 static struct mif6 mif6table[MAXMIFS]; 183 #ifdef MRT6DEBUG 184 u_int mrt6debug = 0; /* debug level */ 185 #define DEBUG_MFC 0x02 186 #define DEBUG_FORWARD 0x04 187 #define DEBUG_EXPIRE 0x08 188 #define DEBUG_XMIT 0x10 189 #define DEBUG_REG 0x20 190 #define DEBUG_PIM 0x40 191 #endif 192 193 static void expire_upcalls __P((void *)); 194 #define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */ 195 #define UPCALL_EXPIRE 6 /* number of timeouts */ 196 197 #ifdef INET 198 #ifdef MROUTING 199 extern struct socket *ip_mrouter; 200 #endif 201 #endif 202 203 /* 204 * 'Interfaces' associated with decapsulator (so we can tell 205 * packets that went through it from ones that get reflected 206 * by a broken gateway). These interfaces are never linked into 207 * the system ifnet list & no routes point to them. I.e., packets 208 * can't be sent this way. They only exist as a placeholder for 209 * multicast source verification. 210 */ 211 struct ifnet multicast_register_if; 212 213 #define ENCAP_HOPS 64 214 215 /* 216 * Private variables. 217 */ 218 static mifi_t nummifs = 0; 219 static mifi_t reg_mif_num = (mifi_t)-1; 220 221 struct pim6stat pim6stat; 222 static int pim6; 223 224 /* 225 * Hash function for a source, group entry 226 */ 227 #define MF6CHASH(a, g) MF6CHASHMOD((a).s6_addr32[0] ^ (a).s6_addr32[1] ^ \ 228 (a).s6_addr32[2] ^ (a).s6_addr32[3] ^ \ 229 (g).s6_addr32[0] ^ (g).s6_addr32[1] ^ \ 230 (g).s6_addr32[2] ^ (g).s6_addr32[3]) 231 232 /* 233 * Find a route for a given origin IPv6 address and Multicast group address. 234 * Quality of service parameter to be added in the future!!! 235 */ 236 237 #define MF6CFIND(o, g, rt) do { \ 238 struct mf6c *_rt = mf6ctable[MF6CHASH(o,g)]; \ 239 rt = NULL; \ 240 mrt6stat.mrt6s_mfc_lookups++; \ 241 while (_rt) { \ 242 if (IN6_ARE_ADDR_EQUAL(&_rt->mf6c_origin.sin6_addr, &(o)) && \ 243 IN6_ARE_ADDR_EQUAL(&_rt->mf6c_mcastgrp.sin6_addr, &(g)) && \ 244 (_rt->mf6c_stall == NULL)) { \ 245 rt = _rt; \ 246 break; \ 247 } \ 248 _rt = _rt->mf6c_next; \ 249 } \ 250 if (rt == NULL) { \ 251 mrt6stat.mrt6s_mfc_misses++; \ 252 } \ 253 } while (/*CONSTCOND*/ 0) 254 255 /* 256 * Macros to compute elapsed time efficiently 257 * Borrowed from Van Jacobson's scheduling code 258 */ 259 #define TV_DELTA(a, b, delta) do { \ 260 int xxs; \ 261 \ 262 delta = (a).tv_usec - (b).tv_usec; \ 263 if ((xxs = (a).tv_sec - (b).tv_sec)) { \ 264 switch (xxs) { \ 265 case 2: \ 266 delta += 1000000; \ 267 /* FALLTHROUGH */ \ 268 case 1: \ 269 delta += 1000000; \ 270 break; \ 271 default: \ 272 delta += (1000000 * xxs); \ 273 } \ 274 } \ 275 } while (/*CONSTCOND*/ 0) 276 277 #define TV_LT(a, b) (((a).tv_usec < (b).tv_usec && \ 278 (a).tv_sec <= (b).tv_sec) || (a).tv_sec < (b).tv_sec) 279 280 #ifdef UPCALL_TIMING 281 #define UPCALL_MAX 50 282 u_long upcall_data[UPCALL_MAX + 1]; 283 static void collate(); 284 #endif /* UPCALL_TIMING */ 285 286 static int get_sg_cnt __P((struct sioc_sg_req6 *)); 287 static int get_mif6_cnt __P((struct sioc_mif_req6 *)); 288 static int ip6_mrouter_init __P((struct socket *, int, int)); 289 static int add_m6if __P((struct mif6ctl *)); 290 static int del_m6if __P((mifi_t *)); 291 static int add_m6fc __P((struct mf6cctl *)); 292 static int del_m6fc __P((struct mf6cctl *)); 293 294 static struct callout expire_upcalls_ch = CALLOUT_INITIALIZER; 295 296 /* 297 * Handle MRT setsockopt commands to modify the multicast routing tables. 298 */ 299 int 300 ip6_mrouter_set(cmd, so, m) 301 int cmd; 302 struct socket *so; 303 struct mbuf *m; 304 { 305 if (cmd != MRT6_INIT && so != ip6_mrouter) 306 return (EACCES); 307 308 switch (cmd) { 309 #ifdef MRT6_OINIT 310 case MRT6_OINIT: 311 #endif 312 case MRT6_INIT: 313 if (m == NULL || m->m_len < sizeof(int)) 314 return (EINVAL); 315 return (ip6_mrouter_init(so, *mtod(m, int *), cmd)); 316 case MRT6_DONE: 317 return (ip6_mrouter_done()); 318 case MRT6_ADD_MIF: 319 if (m == NULL || m->m_len < sizeof(struct mif6ctl)) 320 return (EINVAL); 321 return (add_m6if(mtod(m, struct mif6ctl *))); 322 case MRT6_DEL_MIF: 323 if (m == NULL || m->m_len < sizeof(mifi_t)) 324 return (EINVAL); 325 return (del_m6if(mtod(m, mifi_t *))); 326 case MRT6_ADD_MFC: 327 if (m == NULL || m->m_len < sizeof(struct mf6cctl)) 328 return (EINVAL); 329 return (add_m6fc(mtod(m, struct mf6cctl *))); 330 case MRT6_DEL_MFC: 331 if (m == NULL || m->m_len < sizeof(struct mf6cctl)) 332 return (EINVAL); 333 return (del_m6fc(mtod(m, struct mf6cctl *))); 334 case MRT6_PIM: 335 if (m == NULL || m->m_len < sizeof(int)) 336 return (EINVAL); 337 return (set_pim6(mtod(m, int *))); 338 default: 339 return (EOPNOTSUPP); 340 } 341 } 342 343 /* 344 * Handle MRT getsockopt commands 345 */ 346 int 347 ip6_mrouter_get(cmd, so, m) 348 int cmd; 349 struct socket *so; 350 struct mbuf **m; 351 { 352 struct mbuf *mb; 353 354 if (so != ip6_mrouter) return EACCES; 355 356 *m = mb = m_get(M_WAIT, MT_SOOPTS); 357 358 switch (cmd) { 359 case MRT6_PIM: 360 return get_pim6(mb); 361 default: 362 m_free(mb); 363 return EOPNOTSUPP; 364 } 365 } 366 367 /* 368 * Handle ioctl commands to obtain information from the cache 369 */ 370 int 371 mrt6_ioctl(cmd, data) 372 int cmd; 373 caddr_t data; 374 { 375 376 switch (cmd) { 377 case SIOCGETSGCNT_IN6: 378 return (get_sg_cnt((struct sioc_sg_req6 *)data)); 379 case SIOCGETMIFCNT_IN6: 380 return (get_mif6_cnt((struct sioc_mif_req6 *)data)); 381 default: 382 return (EINVAL); 383 } 384 } 385 386 /* 387 * returns the packet, byte, rpf-failure count for the source group provided 388 */ 389 static int 390 get_sg_cnt(req) 391 struct sioc_sg_req6 *req; 392 { 393 struct mf6c *rt; 394 int s; 395 396 s = splsoftnet(); 397 MF6CFIND(req->src.sin6_addr, req->grp.sin6_addr, rt); 398 splx(s); 399 if (rt != NULL) { 400 req->pktcnt = rt->mf6c_pkt_cnt; 401 req->bytecnt = rt->mf6c_byte_cnt; 402 req->wrong_if = rt->mf6c_wrong_if; 403 } else 404 return (ESRCH); 405 #if 0 406 req->pktcnt = req->bytecnt = req->wrong_if = 0xffffffff; 407 #endif 408 409 return 0; 410 } 411 412 /* 413 * returns the input and output packet and byte counts on the mif provided 414 */ 415 static int 416 get_mif6_cnt(req) 417 struct sioc_mif_req6 *req; 418 { 419 mifi_t mifi = req->mifi; 420 421 if (mifi >= nummifs) 422 return EINVAL; 423 424 req->icount = mif6table[mifi].m6_pkt_in; 425 req->ocount = mif6table[mifi].m6_pkt_out; 426 req->ibytes = mif6table[mifi].m6_bytes_in; 427 req->obytes = mif6table[mifi].m6_bytes_out; 428 429 return 0; 430 } 431 432 /* 433 * Get PIM processiong global 434 */ 435 static int 436 get_pim6(m) 437 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(i) 450 int *i; 451 { 452 if ((*i != 1) && (*i != 0)) 453 return EINVAL; 454 455 pim6 = *i; 456 457 return 0; 458 } 459 460 /* 461 * Enable multicast routing 462 */ 463 static int 464 ip6_mrouter_init(so, v, cmd) 465 struct socket *so; 466 int v; 467 int cmd; 468 { 469 #ifdef MRT6DEBUG 470 if (mrt6debug) 471 log(LOG_DEBUG, 472 "ip6_mrouter_init: so_type = %d, pr_protocol = %d\n", 473 so->so_type, so->so_proto->pr_protocol); 474 #endif 475 476 if (so->so_type != SOCK_RAW || 477 so->so_proto->pr_protocol != IPPROTO_ICMPV6) 478 return (EOPNOTSUPP); 479 480 if (v != 1) 481 return (ENOPROTOOPT); 482 483 if (ip6_mrouter != NULL) 484 return (EADDRINUSE); 485 486 ip6_mrouter = so; 487 ip6_mrouter_ver = cmd; 488 489 bzero((caddr_t)mf6ctable, sizeof(mf6ctable)); 490 bzero((caddr_t)n6expire, sizeof(n6expire)); 491 492 pim6 = 0;/* used for stubbing out/in pim stuff */ 493 494 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 495 expire_upcalls, NULL); 496 497 #ifdef MRT6DEBUG 498 if (mrt6debug) 499 log(LOG_DEBUG, "ip6_mrouter_init\n"); 500 #endif 501 502 return 0; 503 } 504 505 /* 506 * Disable multicast routing 507 */ 508 int 509 ip6_mrouter_done() 510 { 511 mifi_t mifi; 512 int i; 513 struct ifnet *ifp; 514 struct in6_ifreq ifr; 515 struct mf6c *rt; 516 struct rtdetq *rte; 517 int s; 518 519 s = splsoftnet(); 520 521 /* 522 * For each phyint in use, disable promiscuous reception of all IPv6 523 * multicasts. 524 */ 525 #ifdef INET 526 #ifdef MROUTING 527 /* 528 * If there is still IPv4 multicast routing daemon, 529 * we remain interfaces to receive all muliticasted packets. 530 * XXX: there may be an interface in which the IPv4 multicast 531 * daemon is not interested... 532 */ 533 if (!ip_mrouter) 534 #endif 535 #endif 536 { 537 for (mifi = 0; mifi < nummifs; mifi++) { 538 if (mif6table[mifi].m6_ifp && 539 !(mif6table[mifi].m6_flags & MIFF_REGISTER)) { 540 ifr.ifr_addr.sin6_family = AF_INET6; 541 ifr.ifr_addr.sin6_addr= in6addr_any; 542 ifp = mif6table[mifi].m6_ifp; 543 (*ifp->if_ioctl)(ifp, SIOCDELMULTI, 544 (caddr_t)&ifr); 545 } 546 } 547 } 548 #ifdef notyet 549 bzero((caddr_t)qtable, sizeof(qtable)); 550 bzero((caddr_t)tbftable, sizeof(tbftable)); 551 #endif 552 bzero((caddr_t)mif6table, sizeof(mif6table)); 553 nummifs = 0; 554 555 pim6 = 0; /* used to stub out/in pim specific code */ 556 557 callout_stop(&expire_upcalls_ch); 558 559 /* 560 * Free all multicast forwarding cache entries. 561 */ 562 for (i = 0; i < MF6CTBLSIZ; i++) { 563 rt = mf6ctable[i]; 564 while (rt) { 565 struct mf6c *frt; 566 567 for (rte = rt->mf6c_stall; rte != NULL; ) { 568 struct rtdetq *n = rte->next; 569 570 m_free(rte->m); 571 free(rte, M_MRTABLE); 572 rte = n; 573 } 574 frt = rt; 575 rt = rt->mf6c_next; 576 free(frt, M_MRTABLE); 577 } 578 } 579 580 bzero((caddr_t)mf6ctable, sizeof(mf6ctable)); 581 582 /* 583 * Reset de-encapsulation cache 584 */ 585 reg_mif_num = -1; 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(ifp) 602 struct ifnet *ifp; 603 { 604 struct rtdetq *rte; 605 struct mf6c *mfc; 606 mifi_t mifi; 607 int i; 608 609 /* 610 * Delete a mif which points to ifp. 611 */ 612 for (mifi = 0; mifi < nummifs; mifi++) 613 if (mif6table[mifi].m6_ifp == ifp) 614 del_m6if(&mifi); 615 616 /* 617 * Clear rte->ifp of cache entries received on ifp. 618 */ 619 for (i = 0; i < MF6CTBLSIZ; i++) { 620 if (n6expire[i] == 0) 621 continue; 622 623 for (mfc = mf6ctable[i]; mfc != NULL; mfc = mfc->mf6c_next) { 624 for (rte = mfc->mf6c_stall; rte != NULL; rte = rte->next) { 625 if (rte->ifp == ifp) 626 rte->ifp = NULL; 627 } 628 } 629 } 630 } 631 632 633 /* 634 * Add a mif to the mif table 635 */ 636 static int 637 add_m6if(mifcp) 638 struct mif6ctl *mifcp; 639 { 640 struct mif6 *mifp; 641 struct ifnet *ifp; 642 struct in6_ifreq ifr; 643 int error, s; 644 #ifdef notyet 645 struct tbf *m_tbf = tbftable + mifcp->mif6c_mifi; 646 #endif 647 648 if (mifcp->mif6c_mifi >= MAXMIFS) 649 return EINVAL; 650 mifp = mif6table + mifcp->mif6c_mifi; 651 if (mifp->m6_ifp) 652 return EADDRINUSE; /* XXX: is it appropriate? */ 653 if (mifcp->mif6c_pifi == 0 || mifcp->mif6c_pifi >= if_indexlim) 654 return ENXIO; 655 /* 656 * XXX: some OSes can remove ifp and clear ifindex2ifnet[id] 657 * even for id between 0 and if_index. 658 */ 659 if ((ifp = ifindex2ifnet[mifcp->mif6c_pifi]) == NULL) 660 return ENXIO; 661 662 if (mifcp->mif6c_flags & MIFF_REGISTER) { 663 if (reg_mif_num == (mifi_t)-1) { 664 strlcpy(multicast_register_if.if_xname, 665 "register_mif", 666 sizeof(multicast_register_if.if_xname)); 667 multicast_register_if.if_flags |= IFF_LOOPBACK; 668 multicast_register_if.if_index = mifcp->mif6c_mifi; 669 reg_mif_num = mifcp->mif6c_mifi; 670 } 671 672 ifp = &multicast_register_if; 673 674 } /* if REGISTER */ 675 else { 676 /* Make sure the interface supports multicast */ 677 if ((ifp->if_flags & IFF_MULTICAST) == 0) 678 return EOPNOTSUPP; 679 680 s = splsoftnet(); 681 /* 682 * Enable promiscuous reception of all IPv6 multicasts 683 * from the interface. 684 */ 685 ifr.ifr_addr.sin6_family = AF_INET6; 686 ifr.ifr_addr.sin6_addr = in6addr_any; 687 error = (*ifp->if_ioctl)(ifp, SIOCADDMULTI, (caddr_t)&ifr); 688 splx(s); 689 if (error) 690 return error; 691 } 692 693 s = splsoftnet(); 694 mifp->m6_flags = mifcp->mif6c_flags; 695 mifp->m6_ifp = ifp; 696 #ifdef notyet 697 /* scaling up here allows division by 1024 in critical code */ 698 mifp->m6_rate_limit = mifcp->mif6c_rate_limit * 1024 / 1000; 699 #endif 700 /* initialize per mif pkt counters */ 701 mifp->m6_pkt_in = 0; 702 mifp->m6_pkt_out = 0; 703 mifp->m6_bytes_in = 0; 704 mifp->m6_bytes_out = 0; 705 splx(s); 706 707 /* Adjust nummifs up if the mifi is higher than nummifs */ 708 if (nummifs <= mifcp->mif6c_mifi) 709 nummifs = mifcp->mif6c_mifi + 1; 710 711 #ifdef MRT6DEBUG 712 if (mrt6debug) 713 log(LOG_DEBUG, 714 "add_mif #%d, phyint %s%d\n", 715 mifcp->mif6c_mifi, 716 ifp->if_name, ifp->if_unit); 717 #endif 718 719 return 0; 720 } 721 722 /* 723 * Delete a mif from the mif table 724 */ 725 static int 726 del_m6if(mifip) 727 mifi_t *mifip; 728 { 729 struct mif6 *mifp = mif6table + *mifip; 730 mifi_t mifi; 731 struct ifnet *ifp; 732 struct in6_ifreq ifr; 733 int s; 734 735 if (*mifip >= nummifs) 736 return EINVAL; 737 if (mifp->m6_ifp == NULL) 738 return EINVAL; 739 740 s = splsoftnet(); 741 742 if (!(mifp->m6_flags & MIFF_REGISTER)) { 743 /* 744 * XXX: what if there is yet IPv4 multicast daemon 745 * using the interface? 746 */ 747 ifp = mifp->m6_ifp; 748 749 ifr.ifr_addr.sin6_family = AF_INET6; 750 ifr.ifr_addr.sin6_addr = in6addr_any; 751 (*ifp->if_ioctl)(ifp, SIOCDELMULTI, (caddr_t)&ifr); 752 } 753 754 #ifdef notyet 755 bzero((caddr_t)qtable[*mifip], sizeof(qtable[*mifip])); 756 bzero((caddr_t)mifp->m6_tbf, sizeof(*(mifp->m6_tbf))); 757 #endif 758 bzero((caddr_t)mifp, sizeof (*mifp)); 759 760 /* Adjust nummifs down */ 761 for (mifi = nummifs; mifi > 0; mifi--) 762 if (mif6table[mifi - 1].m6_ifp) 763 break; 764 nummifs = mifi; 765 766 splx(s); 767 768 #ifdef MRT6DEBUG 769 if (mrt6debug) 770 log(LOG_DEBUG, "del_m6if %d, nummifs %d\n", *mifip, nummifs); 771 #endif 772 773 return 0; 774 } 775 776 /* 777 * Add an mfc entry 778 */ 779 static int 780 add_m6fc(mfccp) 781 struct mf6cctl *mfccp; 782 { 783 struct mf6c *rt; 784 u_long hash; 785 struct rtdetq *rte; 786 u_short nstl; 787 int s; 788 789 MF6CFIND(mfccp->mf6cc_origin.sin6_addr, 790 mfccp->mf6cc_mcastgrp.sin6_addr, rt); 791 792 /* If an entry already exists, just update the fields */ 793 if (rt) { 794 #ifdef MRT6DEBUG 795 if (mrt6debug & DEBUG_MFC) 796 log(LOG_DEBUG,"add_m6fc update o %s g %s p %x\n", 797 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 798 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 799 mfccp->mf6cc_parent); 800 #endif 801 802 s = splsoftnet(); 803 rt->mf6c_parent = mfccp->mf6cc_parent; 804 rt->mf6c_ifset = mfccp->mf6cc_ifset; 805 splx(s); 806 return 0; 807 } 808 809 /* 810 * Find the entry for which the upcall was made and update 811 */ 812 s = splsoftnet(); 813 hash = MF6CHASH(mfccp->mf6cc_origin.sin6_addr, 814 mfccp->mf6cc_mcastgrp.sin6_addr); 815 for (rt = mf6ctable[hash], nstl = 0; rt; rt = rt->mf6c_next) { 816 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 817 &mfccp->mf6cc_origin.sin6_addr) && 818 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 819 &mfccp->mf6cc_mcastgrp.sin6_addr) && 820 (rt->mf6c_stall != NULL)) { 821 822 if (nstl++) 823 log(LOG_ERR, 824 "add_m6fc: %s o %s g %s p %x dbx %p\n", 825 "multiple kernel entries", 826 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 827 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 828 mfccp->mf6cc_parent, rt->mf6c_stall); 829 830 #ifdef MRT6DEBUG 831 if (mrt6debug & DEBUG_MFC) 832 log(LOG_DEBUG, 833 "add_m6fc o %s g %s p %x dbg %x\n", 834 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 835 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 836 mfccp->mf6cc_parent, rt->mf6c_stall); 837 #endif 838 839 rt->mf6c_origin = mfccp->mf6cc_origin; 840 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 841 rt->mf6c_parent = mfccp->mf6cc_parent; 842 rt->mf6c_ifset = mfccp->mf6cc_ifset; 843 /* initialize pkt counters per src-grp */ 844 rt->mf6c_pkt_cnt = 0; 845 rt->mf6c_byte_cnt = 0; 846 rt->mf6c_wrong_if = 0; 847 848 rt->mf6c_expire = 0; /* Don't clean this guy up */ 849 n6expire[hash]--; 850 851 /* free packets Qed at the end of this entry */ 852 for (rte = rt->mf6c_stall; rte != NULL; ) { 853 struct rtdetq *n = rte->next; 854 if (rte->ifp) { 855 ip6_mdq(rte->m, rte->ifp, rt); 856 } 857 m_freem(rte->m); 858 #ifdef UPCALL_TIMING 859 collate(&(rte->t)); 860 #endif /* UPCALL_TIMING */ 861 free(rte, M_MRTABLE); 862 rte = n; 863 } 864 rt->mf6c_stall = NULL; 865 } 866 } 867 868 /* 869 * It is possible that an entry is being inserted without an upcall 870 */ 871 if (nstl == 0) { 872 #ifdef MRT6DEBUG 873 if (mrt6debug & DEBUG_MFC) 874 log(LOG_DEBUG, 875 "add_mfc no upcall h %d o %s g %s p %x\n", 876 hash, 877 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 878 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 879 mfccp->mf6cc_parent); 880 #endif 881 882 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 883 884 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 885 &mfccp->mf6cc_origin.sin6_addr)&& 886 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 887 &mfccp->mf6cc_mcastgrp.sin6_addr)) { 888 889 rt->mf6c_origin = mfccp->mf6cc_origin; 890 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 891 rt->mf6c_parent = mfccp->mf6cc_parent; 892 rt->mf6c_ifset = mfccp->mf6cc_ifset; 893 /* initialize pkt counters per src-grp */ 894 rt->mf6c_pkt_cnt = 0; 895 rt->mf6c_byte_cnt = 0; 896 rt->mf6c_wrong_if = 0; 897 898 if (rt->mf6c_expire) 899 n6expire[hash]--; 900 rt->mf6c_expire = 0; 901 } 902 } 903 if (rt == NULL) { 904 /* no upcall, so make a new entry */ 905 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE, 906 M_NOWAIT); 907 if (rt == NULL) { 908 splx(s); 909 return ENOBUFS; 910 } 911 912 /* insert new entry at head of hash chain */ 913 rt->mf6c_origin = mfccp->mf6cc_origin; 914 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 915 rt->mf6c_parent = mfccp->mf6cc_parent; 916 rt->mf6c_ifset = mfccp->mf6cc_ifset; 917 /* initialize pkt counters per src-grp */ 918 rt->mf6c_pkt_cnt = 0; 919 rt->mf6c_byte_cnt = 0; 920 rt->mf6c_wrong_if = 0; 921 rt->mf6c_expire = 0; 922 rt->mf6c_stall = NULL; 923 924 /* link into table */ 925 rt->mf6c_next = mf6ctable[hash]; 926 mf6ctable[hash] = rt; 927 } 928 } 929 splx(s); 930 return 0; 931 } 932 933 #ifdef UPCALL_TIMING 934 /* 935 * collect delay statistics on the upcalls 936 */ 937 static void 938 collate(t) 939 struct timeval *t; 940 { 941 u_long d; 942 struct timeval tp; 943 u_long delta; 944 945 GET_TIME(tp); 946 947 if (TV_LT(*t, tp)) 948 { 949 TV_DELTA(tp, *t, delta); 950 951 d = delta >> 10; 952 if (d > UPCALL_MAX) 953 d = UPCALL_MAX; 954 955 ++upcall_data[d]; 956 } 957 } 958 #endif /* UPCALL_TIMING */ 959 960 /* 961 * Delete an mfc entry 962 */ 963 static int 964 del_m6fc(mfccp) 965 struct mf6cctl *mfccp; 966 { 967 struct sockaddr_in6 origin; 968 struct sockaddr_in6 mcastgrp; 969 struct mf6c *rt; 970 struct mf6c **nptr; 971 u_long hash; 972 int s; 973 974 origin = mfccp->mf6cc_origin; 975 mcastgrp = mfccp->mf6cc_mcastgrp; 976 hash = MF6CHASH(origin.sin6_addr, mcastgrp.sin6_addr); 977 978 #ifdef MRT6DEBUG 979 if (mrt6debug & DEBUG_MFC) 980 log(LOG_DEBUG,"del_m6fc orig %s mcastgrp %s\n", 981 ip6_sprintf(&origin.sin6_addr), 982 ip6_sprintf(&mcastgrp.sin6_addr)); 983 #endif 984 985 s = splsoftnet(); 986 987 nptr = &mf6ctable[hash]; 988 while ((rt = *nptr) != NULL) { 989 if (IN6_ARE_ADDR_EQUAL(&origin.sin6_addr, 990 &rt->mf6c_origin.sin6_addr) && 991 IN6_ARE_ADDR_EQUAL(&mcastgrp.sin6_addr, 992 &rt->mf6c_mcastgrp.sin6_addr) && 993 rt->mf6c_stall == NULL) 994 break; 995 996 nptr = &rt->mf6c_next; 997 } 998 if (rt == NULL) { 999 splx(s); 1000 return EADDRNOTAVAIL; 1001 } 1002 1003 *nptr = rt->mf6c_next; 1004 free(rt, M_MRTABLE); 1005 1006 splx(s); 1007 1008 return 0; 1009 } 1010 1011 static int 1012 socket_send(s, mm, src) 1013 struct socket *s; 1014 struct mbuf *mm; 1015 struct sockaddr_in6 *src; 1016 { 1017 if (s) { 1018 if (sbappendaddr(&s->so_rcv, 1019 (struct sockaddr *)src, 1020 mm, (struct mbuf *)0) != 0) { 1021 sorwakeup(s); 1022 return 0; 1023 } 1024 } 1025 m_freem(mm); 1026 return -1; 1027 } 1028 1029 /* 1030 * IPv6 multicast forwarding function. This function assumes that the packet 1031 * pointed to by "ip6" has arrived on (or is about to be sent to) the interface 1032 * pointed to by "ifp", and the packet is to be relayed to other networks 1033 * that have members of the packet's destination IPv6 multicast group. 1034 * 1035 * The packet is returned unscathed to the caller, unless it is 1036 * erroneous, in which case a non-zero return value tells the caller to 1037 * discard it. 1038 */ 1039 1040 int 1041 ip6_mforward(ip6, ifp, m) 1042 struct ip6_hdr *ip6; 1043 struct ifnet *ifp; 1044 struct mbuf *m; 1045 { 1046 struct mf6c *rt; 1047 struct mif6 *mifp; 1048 struct mbuf *mm; 1049 int s; 1050 mifi_t mifi; 1051 struct sockaddr_in6 sin6; 1052 1053 #ifdef MRT6DEBUG 1054 if (mrt6debug & DEBUG_FORWARD) 1055 log(LOG_DEBUG, "ip6_mforward: src %s, dst %s, ifindex %d\n", 1056 ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst), 1057 ifp->if_index); 1058 #endif 1059 1060 /* 1061 * Don't forward a packet with Hop limit of zero or one, 1062 * or a packet destined to a local-only group. 1063 */ 1064 if (ip6->ip6_hlim <= 1 || IN6_IS_ADDR_MC_NODELOCAL(&ip6->ip6_dst) || 1065 IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst)) 1066 return 0; 1067 ip6->ip6_hlim--; 1068 1069 /* 1070 * Source address check: do not forward packets with unspecified 1071 * source. It was discussed in July 2000, on ipngwg mailing list. 1072 * This is rather more serious than unicast cases, because some 1073 * MLD packets can be sent with the unspecified source address 1074 * (although such packets must normally set 1 to the hop limit field). 1075 */ 1076 if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) { 1077 ip6stat.ip6s_cantforward++; 1078 if (ip6_log_time + ip6_log_interval < time.tv_sec) { 1079 ip6_log_time = time.tv_sec; 1080 log(LOG_DEBUG, 1081 "cannot forward " 1082 "from %s to %s nxt %d received on %s\n", 1083 ip6_sprintf(&ip6->ip6_src), 1084 ip6_sprintf(&ip6->ip6_dst), 1085 ip6->ip6_nxt, 1086 m->m_pkthdr.rcvif ? 1087 if_name(m->m_pkthdr.rcvif) : "?"); 1088 } 1089 return 0; 1090 } 1091 1092 /* 1093 * Determine forwarding mifs from the forwarding cache table 1094 */ 1095 s = splsoftnet(); 1096 MF6CFIND(ip6->ip6_src, ip6->ip6_dst, rt); 1097 1098 /* Entry exists, so forward if necessary */ 1099 if (rt) { 1100 splx(s); 1101 return (ip6_mdq(m, ifp, rt)); 1102 } else { 1103 /* 1104 * If we don't have a route for packet's origin, 1105 * Make a copy of the packet & 1106 * send message to routing daemon 1107 */ 1108 1109 struct mbuf *mb0; 1110 struct rtdetq *rte; 1111 u_long hash; 1112 /* int i, npkts;*/ 1113 #ifdef UPCALL_TIMING 1114 struct timeval tp; 1115 1116 GET_TIME(tp); 1117 #endif /* UPCALL_TIMING */ 1118 1119 mrt6stat.mrt6s_no_route++; 1120 #ifdef MRT6DEBUG 1121 if (mrt6debug & (DEBUG_FORWARD | DEBUG_MFC)) 1122 log(LOG_DEBUG, "ip6_mforward: no rte s %s g %s\n", 1123 ip6_sprintf(&ip6->ip6_src), 1124 ip6_sprintf(&ip6->ip6_dst)); 1125 #endif 1126 1127 /* 1128 * Allocate mbufs early so that we don't do extra work if we 1129 * are just going to fail anyway. 1130 */ 1131 rte = (struct rtdetq *)malloc(sizeof(*rte), M_MRTABLE, 1132 M_NOWAIT); 1133 if (rte == NULL) { 1134 splx(s); 1135 return ENOBUFS; 1136 } 1137 mb0 = m_copy(m, 0, M_COPYALL); 1138 /* 1139 * Pullup packet header if needed before storing it, 1140 * as other references may modify it in the meantime. 1141 */ 1142 if (mb0 && 1143 (M_READONLY(mb0) || mb0->m_len < sizeof(struct ip6_hdr))) 1144 mb0 = m_pullup(mb0, sizeof(struct ip6_hdr)); 1145 if (mb0 == NULL) { 1146 free(rte, M_MRTABLE); 1147 splx(s); 1148 return ENOBUFS; 1149 } 1150 1151 /* is there an upcall waiting for this packet? */ 1152 hash = MF6CHASH(ip6->ip6_src, ip6->ip6_dst); 1153 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 1154 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, 1155 &rt->mf6c_origin.sin6_addr) && 1156 IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, 1157 &rt->mf6c_mcastgrp.sin6_addr) && 1158 (rt->mf6c_stall != NULL)) 1159 break; 1160 } 1161 1162 if (rt == NULL) { 1163 struct mrt6msg *im; 1164 struct omrt6msg *oim; 1165 1166 /* no upcall, so make a new entry */ 1167 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE, 1168 M_NOWAIT); 1169 if (rt == NULL) { 1170 free(rte, M_MRTABLE); 1171 m_freem(mb0); 1172 splx(s); 1173 return ENOBUFS; 1174 } 1175 /* 1176 * Make a copy of the header to send to the user 1177 * level process 1178 */ 1179 mm = m_copy(mb0, 0, sizeof(struct ip6_hdr)); 1180 1181 if (mm == NULL) { 1182 free(rte, M_MRTABLE); 1183 m_freem(mb0); 1184 free(rt, M_MRTABLE); 1185 splx(s); 1186 return ENOBUFS; 1187 } 1188 1189 /* 1190 * Send message to routing daemon 1191 */ 1192 (void)memset(&sin6, 0, sizeof(sin6)); 1193 sin6.sin6_len = sizeof(sin6); 1194 sin6.sin6_family = AF_INET6; 1195 sin6.sin6_addr = ip6->ip6_src; 1196 1197 im = NULL; 1198 oim = NULL; 1199 switch (ip6_mrouter_ver) { 1200 case MRT6_OINIT: 1201 oim = mtod(mm, struct omrt6msg *); 1202 oim->im6_msgtype = MRT6MSG_NOCACHE; 1203 oim->im6_mbz = 0; 1204 break; 1205 case MRT6_INIT: 1206 im = mtod(mm, struct mrt6msg *); 1207 im->im6_msgtype = MRT6MSG_NOCACHE; 1208 im->im6_mbz = 0; 1209 break; 1210 default: 1211 free(rte, M_MRTABLE); 1212 m_freem(mb0); 1213 free(rt, M_MRTABLE); 1214 splx(s); 1215 return EINVAL; 1216 } 1217 1218 #ifdef MRT6DEBUG 1219 if (mrt6debug & DEBUG_FORWARD) 1220 log(LOG_DEBUG, 1221 "getting the iif info in the kernel\n"); 1222 #endif 1223 1224 for (mifp = mif6table, mifi = 0; 1225 mifi < nummifs && mifp->m6_ifp != ifp; 1226 mifp++, mifi++) 1227 ; 1228 1229 switch (ip6_mrouter_ver) { 1230 case MRT6_OINIT: 1231 oim->im6_mif = mifi; 1232 break; 1233 case MRT6_INIT: 1234 im->im6_mif = mifi; 1235 break; 1236 } 1237 1238 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1239 log(LOG_WARNING, "ip6_mforward: ip6_mrouter " 1240 "socket queue full\n"); 1241 mrt6stat.mrt6s_upq_sockfull++; 1242 free(rte, M_MRTABLE); 1243 m_freem(mb0); 1244 free(rt, M_MRTABLE); 1245 splx(s); 1246 return ENOBUFS; 1247 } 1248 1249 mrt6stat.mrt6s_upcalls++; 1250 1251 /* insert new entry at head of hash chain */ 1252 bzero(rt, sizeof(*rt)); 1253 rt->mf6c_origin.sin6_family = AF_INET6; 1254 rt->mf6c_origin.sin6_len = sizeof(struct sockaddr_in6); 1255 rt->mf6c_origin.sin6_addr = ip6->ip6_src; 1256 rt->mf6c_mcastgrp.sin6_family = AF_INET6; 1257 rt->mf6c_mcastgrp.sin6_len = sizeof(struct sockaddr_in6); 1258 rt->mf6c_mcastgrp.sin6_addr = ip6->ip6_dst; 1259 rt->mf6c_expire = UPCALL_EXPIRE; 1260 n6expire[hash]++; 1261 rt->mf6c_parent = MF6C_INCOMPLETE_PARENT; 1262 1263 /* link into table */ 1264 rt->mf6c_next = mf6ctable[hash]; 1265 mf6ctable[hash] = rt; 1266 /* Add this entry to the end of the queue */ 1267 rt->mf6c_stall = rte; 1268 } else { 1269 /* determine if q has overflowed */ 1270 struct rtdetq **p; 1271 int npkts = 0; 1272 1273 for (p = &rt->mf6c_stall; *p != NULL; p = &(*p)->next) 1274 if (++npkts > MAX_UPQ6) { 1275 mrt6stat.mrt6s_upq_ovflw++; 1276 free(rte, M_MRTABLE); 1277 m_freem(mb0); 1278 splx(s); 1279 return 0; 1280 } 1281 1282 /* Add this entry to the end of the queue */ 1283 *p = rte; 1284 } 1285 1286 rte->next = NULL; 1287 rte->m = mb0; 1288 rte->ifp = ifp; 1289 #ifdef UPCALL_TIMING 1290 rte->t = tp; 1291 #endif /* UPCALL_TIMING */ 1292 1293 splx(s); 1294 1295 return 0; 1296 } 1297 } 1298 1299 /* 1300 * Clean up cache entries if upcalls are not serviced 1301 * Call from the Slow Timeout mechanism, every half second. 1302 */ 1303 static void 1304 expire_upcalls(unused) 1305 void *unused; 1306 { 1307 struct rtdetq *rte; 1308 struct mf6c *mfc, **nptr; 1309 int i; 1310 int s; 1311 1312 s = splsoftnet(); 1313 for (i = 0; i < MF6CTBLSIZ; i++) { 1314 if (n6expire[i] == 0) 1315 continue; 1316 nptr = &mf6ctable[i]; 1317 while ((mfc = *nptr) != NULL) { 1318 rte = mfc->mf6c_stall; 1319 /* 1320 * Skip real cache entries 1321 * Make sure it wasn't marked to not expire (shouldn't happen) 1322 * If it expires now 1323 */ 1324 if (rte != NULL && 1325 mfc->mf6c_expire != 0 && 1326 --mfc->mf6c_expire == 0) { 1327 #ifdef MRT6DEBUG 1328 if (mrt6debug & DEBUG_EXPIRE) 1329 log(LOG_DEBUG, "expire_upcalls: expiring (%s %s)\n", 1330 ip6_sprintf(&mfc->mf6c_origin.sin6_addr), 1331 ip6_sprintf(&mfc->mf6c_mcastgrp.sin6_addr)); 1332 #endif 1333 /* 1334 * drop all the packets 1335 * free the mbuf with the pkt, if, timing info 1336 */ 1337 do { 1338 struct rtdetq *n = rte->next; 1339 m_freem(rte->m); 1340 free(rte, M_MRTABLE); 1341 rte = n; 1342 } while (rte != NULL); 1343 mrt6stat.mrt6s_cache_cleanups++; 1344 n6expire[i]--; 1345 1346 *nptr = mfc->mf6c_next; 1347 free(mfc, M_MRTABLE); 1348 } else { 1349 nptr = &mfc->mf6c_next; 1350 } 1351 } 1352 } 1353 splx(s); 1354 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 1355 expire_upcalls, NULL); 1356 } 1357 1358 /* 1359 * Packet forwarding routine once entry in the cache is made 1360 */ 1361 static int 1362 ip6_mdq(m, ifp, rt) 1363 struct mbuf *m; 1364 struct ifnet *ifp; 1365 struct mf6c *rt; 1366 { 1367 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 1368 mifi_t mifi, iif; 1369 struct mif6 *mifp; 1370 int plen = m->m_pkthdr.len; 1371 1372 /* 1373 * Macro to send packet on mif. Since RSVP packets don't get counted on 1374 * input, they shouldn't get counted on output, so statistics keeping is 1375 * separate. 1376 */ 1377 1378 #define MC6_SEND(ip6, mifp, m) do { \ 1379 if ((mifp)->m6_flags & MIFF_REGISTER) \ 1380 register_send((ip6), (mifp), (m)); \ 1381 else \ 1382 phyint_send((ip6), (mifp), (m)); \ 1383 } while (/*CONSTCOND*/ 0) 1384 1385 /* 1386 * Don't forward if it didn't arrive from the parent mif 1387 * for its origin. 1388 */ 1389 mifi = rt->mf6c_parent; 1390 if ((mifi >= nummifs) || (mif6table[mifi].m6_ifp != ifp)) { 1391 /* came in the wrong interface */ 1392 #ifdef MRT6DEBUG 1393 if (mrt6debug & DEBUG_FORWARD) 1394 log(LOG_DEBUG, 1395 "wrong if: ifid %d mifi %d mififid %x\n", 1396 ifp->if_index, mifi, 1397 mif6table[mifi].m6_ifp ? 1398 mif6table[mifi].m6_ifp->if_index : -1); 1399 #endif 1400 mrt6stat.mrt6s_wrong_if++; 1401 rt->mf6c_wrong_if++; 1402 /* 1403 * If we are doing PIM processing, and we are forwarding 1404 * packets on this interface, send a message to the 1405 * routing daemon. 1406 */ 1407 /* have to make sure this is a valid mif */ 1408 if (mifi < nummifs && mif6table[mifi].m6_ifp) 1409 if (pim6 && (m->m_flags & M_LOOP) == 0) { 1410 /* 1411 * Check the M_LOOP flag to avoid an 1412 * unnecessary PIM assert. 1413 * XXX: M_LOOP is an ad-hoc hack... 1414 */ 1415 struct sockaddr_in6 sin6; 1416 1417 struct mbuf *mm; 1418 struct mrt6msg *im; 1419 struct omrt6msg *oim; 1420 1421 mm = m_copy(m, 0, sizeof(struct ip6_hdr)); 1422 if (mm && 1423 (M_READONLY(mm) || 1424 mm->m_len < sizeof(struct ip6_hdr))) 1425 mm = m_pullup(mm, sizeof(struct ip6_hdr)); 1426 if (mm == NULL) 1427 return ENOBUFS; 1428 1429 oim = NULL; 1430 im = NULL; 1431 switch (ip6_mrouter_ver) { 1432 case MRT6_OINIT: 1433 oim = mtod(mm, struct omrt6msg *); 1434 oim->im6_msgtype = MRT6MSG_WRONGMIF; 1435 oim->im6_mbz = 0; 1436 break; 1437 case MRT6_INIT: 1438 im = mtod(mm, struct mrt6msg *); 1439 im->im6_msgtype = MRT6MSG_WRONGMIF; 1440 im->im6_mbz = 0; 1441 break; 1442 default: 1443 m_freem(mm); 1444 return EINVAL; 1445 } 1446 1447 for (mifp = mif6table, iif = 0; 1448 iif < nummifs && mifp && 1449 mifp->m6_ifp != ifp; 1450 mifp++, iif++) 1451 ; 1452 1453 (void)memset(&sin6, 0, sizeof(sin6)); 1454 sin6.sin6_len = sizeof(sin6); 1455 sin6.sin6_family = AF_INET6; 1456 switch (ip6_mrouter_ver) { 1457 case MRT6_OINIT: 1458 oim->im6_mif = iif; 1459 sin6.sin6_addr = oim->im6_src; 1460 break; 1461 case MRT6_INIT: 1462 im->im6_mif = iif; 1463 sin6.sin6_addr = im->im6_src; 1464 break; 1465 } 1466 1467 mrt6stat.mrt6s_upcalls++; 1468 1469 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1470 #ifdef MRT6DEBUG 1471 if (mrt6debug) 1472 log(LOG_WARNING, "mdq, ip6_mrouter socket queue full\n"); 1473 #endif 1474 ++mrt6stat.mrt6s_upq_sockfull; 1475 return ENOBUFS; 1476 } /* if socket Q full */ 1477 } /* if PIM */ 1478 return 0; 1479 } /* if wrong iif */ 1480 1481 /* If I sourced this packet, it counts as output, else it was input. */ 1482 if (m->m_pkthdr.rcvif == NULL) { 1483 /* XXX: is rcvif really NULL when output?? */ 1484 mif6table[mifi].m6_pkt_out++; 1485 mif6table[mifi].m6_bytes_out += plen; 1486 } else { 1487 mif6table[mifi].m6_pkt_in++; 1488 mif6table[mifi].m6_bytes_in += plen; 1489 } 1490 rt->mf6c_pkt_cnt++; 1491 rt->mf6c_byte_cnt += plen; 1492 1493 /* 1494 * For each mif, forward a copy of the packet if there are group 1495 * members downstream on the interface. 1496 */ 1497 for (mifp = mif6table, mifi = 0; mifi < nummifs; mifp++, mifi++) 1498 if (IF_ISSET(mifi, &rt->mf6c_ifset)) { 1499 if (mif6table[mifi].m6_ifp == NULL) 1500 continue; 1501 #ifdef notyet 1502 /* 1503 * check if the outgoing packet is going to break 1504 * a scope boundary. 1505 * XXX For packets through PIM register tunnel 1506 * interface, we believe a routing daemon. 1507 */ 1508 if ((mif6table[rt->mf6c_parent].m6_flags & 1509 MIFF_REGISTER) == 0 && 1510 (mif6table[mifi].m6_flags & MIFF_REGISTER) == 0 && 1511 (in6_addr2scopeid(ifp, &ip6->ip6_dst) != 1512 in6_addr2scopeid(mif6table[mifi].m6_ifp, 1513 &ip6->ip6_dst) || 1514 in6_addr2scopeid(ifp, &ip6->ip6_src) != 1515 in6_addr2scopeid(mif6table[mifi].m6_ifp, 1516 &ip6->ip6_src))) { 1517 ip6stat.ip6s_badscope++; 1518 continue; 1519 } 1520 #endif 1521 1522 mifp->m6_pkt_out++; 1523 mifp->m6_bytes_out += plen; 1524 MC6_SEND(ip6, mifp, m); 1525 } 1526 return 0; 1527 } 1528 1529 static void 1530 phyint_send(ip6, mifp, m) 1531 struct ip6_hdr *ip6; 1532 struct mif6 *mifp; 1533 struct mbuf *m; 1534 { 1535 struct mbuf *mb_copy; 1536 struct ifnet *ifp = mifp->m6_ifp; 1537 int error = 0; 1538 int s = splsoftnet(); 1539 static struct route_in6 ro; 1540 struct in6_multi *in6m; 1541 struct sockaddr_in6 *dst6; 1542 u_long linkmtu; 1543 1544 /* 1545 * Make a new reference to the packet; make sure that 1546 * the IPv6 header is actually copied, not just referenced, 1547 * so that ip6_output() only scribbles on the copy. 1548 */ 1549 mb_copy = m_copy(m, 0, M_COPYALL); 1550 if (mb_copy && 1551 (M_READONLY(mb_copy) || mb_copy->m_len < sizeof(struct ip6_hdr))) 1552 mb_copy = m_pullup(mb_copy, sizeof(struct ip6_hdr)); 1553 if (mb_copy == NULL) { 1554 splx(s); 1555 return; 1556 } 1557 /* set MCAST flag to the outgoing packet */ 1558 mb_copy->m_flags |= M_MCAST; 1559 1560 /* 1561 * If we sourced the packet, call ip6_output since we may devide 1562 * the packet into fragments when the packet is too big for the 1563 * outgoing interface. 1564 * Otherwise, we can simply send the packet to the interface 1565 * sending queue. 1566 */ 1567 if (m->m_pkthdr.rcvif == NULL) { 1568 struct ip6_moptions im6o; 1569 1570 im6o.im6o_multicast_ifp = ifp; 1571 /* XXX: ip6_output will override ip6->ip6_hlim */ 1572 im6o.im6o_multicast_hlim = ip6->ip6_hlim; 1573 im6o.im6o_multicast_loop = 1; 1574 error = ip6_output(mb_copy, NULL, &ro, IPV6_FORWARDING, 1575 &im6o, (struct socket *)0, NULL); 1576 1577 #ifdef MRT6DEBUG 1578 if (mrt6debug & DEBUG_XMIT) 1579 log(LOG_DEBUG, "phyint_send on mif %d err %d\n", 1580 mifp - mif6table, error); 1581 #endif 1582 splx(s); 1583 return; 1584 } 1585 1586 /* 1587 * If we belong to the destination multicast group 1588 * on the outgoing interface, loop back a copy. 1589 */ 1590 dst6 = (struct sockaddr_in6 *)&ro.ro_dst; 1591 IN6_LOOKUP_MULTI(ip6->ip6_dst, ifp, in6m); 1592 if (in6m != NULL) { 1593 dst6->sin6_len = sizeof(struct sockaddr_in6); 1594 dst6->sin6_family = AF_INET6; 1595 dst6->sin6_addr = ip6->ip6_dst; 1596 ip6_mloopback(ifp, m, (struct sockaddr_in6 *)&ro.ro_dst); 1597 } 1598 /* 1599 * Put the packet into the sending queue of the outgoing interface 1600 * if it would fit in the MTU of the interface. 1601 */ 1602 linkmtu = IN6_LINKMTU(ifp); 1603 if (mb_copy->m_pkthdr.len <= linkmtu || linkmtu < IPV6_MMTU) { 1604 dst6->sin6_len = sizeof(struct sockaddr_in6); 1605 dst6->sin6_family = AF_INET6; 1606 dst6->sin6_addr = ip6->ip6_dst; 1607 /* 1608 * We just call if_output instead of nd6_output here, since 1609 * we need no ND for a multicast forwarded packet...right? 1610 */ 1611 error = (*ifp->if_output)(ifp, mb_copy, 1612 (struct sockaddr *)&ro.ro_dst, NULL); 1613 #ifdef MRT6DEBUG 1614 if (mrt6debug & DEBUG_XMIT) 1615 log(LOG_DEBUG, "phyint_send on mif %d err %d\n", 1616 mifp - mif6table, error); 1617 #endif 1618 } else { 1619 #ifdef MULTICAST_PMTUD 1620 icmp6_error(mb_copy, ICMP6_PACKET_TOO_BIG, 0, linkmtu); 1621 #else 1622 #ifdef MRT6DEBUG 1623 if (mrt6debug & DEBUG_XMIT) 1624 log(LOG_DEBUG, 1625 "phyint_send: packet too big on %s o %s g %s" 1626 " size %d(discarded)\n", 1627 if_name(ifp), 1628 ip6_sprintf(&ip6->ip6_src), 1629 ip6_sprintf(&ip6->ip6_dst), 1630 mb_copy->m_pkthdr.len); 1631 #endif /* MRT6DEBUG */ 1632 m_freem(mb_copy); /* simply discard the packet */ 1633 #endif 1634 } 1635 1636 splx(s); 1637 } 1638 1639 static int 1640 register_send(ip6, mif, m) 1641 struct ip6_hdr *ip6; 1642 struct mif6 *mif; 1643 struct mbuf *m; 1644 { 1645 struct mbuf *mm; 1646 int i, len = m->m_pkthdr.len; 1647 struct sockaddr_in6 sin6; 1648 struct mrt6msg *im6; 1649 1650 #ifdef MRT6DEBUG 1651 if (mrt6debug) 1652 log(LOG_DEBUG, "** IPv6 register_send **\n src %s dst %s\n", 1653 ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst)); 1654 #endif 1655 ++pim6stat.pim6s_snd_registers; 1656 1657 /* Make a copy of the packet to send to the user level process */ 1658 MGETHDR(mm, M_DONTWAIT, MT_HEADER); 1659 if (mm == NULL) 1660 return ENOBUFS; 1661 mm->m_data += max_linkhdr; 1662 mm->m_len = sizeof(struct ip6_hdr); 1663 1664 if ((mm->m_next = m_copy(m, 0, M_COPYALL)) == NULL) { 1665 m_freem(mm); 1666 return ENOBUFS; 1667 } 1668 i = MHLEN - M_LEADINGSPACE(mm); 1669 if (i > len) 1670 i = len; 1671 mm = m_pullup(mm, i); 1672 if (mm == NULL) 1673 return ENOBUFS; 1674 /* TODO: check it! */ 1675 mm->m_pkthdr.len = len + sizeof(struct ip6_hdr); 1676 1677 /* 1678 * Send message to routing daemon 1679 */ 1680 (void)memset(&sin6, 0, sizeof(sin6)); 1681 sin6.sin6_len = sizeof(sin6); 1682 sin6.sin6_family = AF_INET6; 1683 sin6.sin6_addr = ip6->ip6_src; 1684 1685 im6 = mtod(mm, struct mrt6msg *); 1686 im6->im6_msgtype = MRT6MSG_WHOLEPKT; 1687 im6->im6_mbz = 0; 1688 1689 im6->im6_mif = mif - mif6table; 1690 1691 /* iif info is not given for reg. encap.n */ 1692 mrt6stat.mrt6s_upcalls++; 1693 1694 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1695 #ifdef MRT6DEBUG 1696 if (mrt6debug) 1697 log(LOG_WARNING, 1698 "register_send: ip6_mrouter socket queue full\n"); 1699 #endif 1700 ++mrt6stat.mrt6s_upq_sockfull; 1701 return ENOBUFS; 1702 } 1703 return 0; 1704 } 1705 1706 /* 1707 * PIM sparse mode hook 1708 * Receives the pim control messages, and passes them up to the listening 1709 * socket, using rip6_input. 1710 * The only message processed is the REGISTER pim message; the pim header 1711 * is stripped off, and the inner packet is passed to register_mforward. 1712 */ 1713 int 1714 pim6_input(mp, offp, proto) 1715 struct mbuf **mp; 1716 int *offp, proto; 1717 { 1718 struct pim *pim; /* pointer to a pim struct */ 1719 struct ip6_hdr *ip6; 1720 int pimlen; 1721 struct mbuf *m = *mp; 1722 int minlen; 1723 int off = *offp; 1724 1725 ++pim6stat.pim6s_rcv_total; 1726 1727 ip6 = mtod(m, struct ip6_hdr *); 1728 pimlen = m->m_pkthdr.len - *offp; 1729 1730 /* 1731 * Validate lengths 1732 */ 1733 if (pimlen < PIM_MINLEN) { 1734 ++pim6stat.pim6s_rcv_tooshort; 1735 #ifdef MRT6DEBUG 1736 if (mrt6debug & DEBUG_PIM) 1737 log(LOG_DEBUG,"pim6_input: PIM packet too short\n"); 1738 #endif 1739 m_freem(m); 1740 return (IPPROTO_DONE); 1741 } 1742 1743 /* 1744 * if the packet is at least as big as a REGISTER, go ahead 1745 * and grab the PIM REGISTER header size, to avoid another 1746 * possible m_pullup() later. 1747 * 1748 * PIM_MINLEN == pimhdr + u_int32 == 8 1749 * PIM6_REG_MINLEN == pimhdr + reghdr + eip6hdr == 4 + 4 + 40 1750 */ 1751 minlen = (pimlen >= PIM6_REG_MINLEN) ? PIM6_REG_MINLEN : PIM_MINLEN; 1752 1753 /* 1754 * Make sure that the IP6 and PIM headers in contiguous memory, and 1755 * possibly the PIM REGISTER header 1756 */ 1757 IP6_EXTHDR_GET(pim, struct pim *, m, off, minlen); 1758 if (pim == NULL) { 1759 pim6stat.pim6s_rcv_tooshort++; 1760 return IPPROTO_DONE; 1761 } 1762 1763 /* PIM version check */ 1764 if (pim->pim_ver != PIM_VERSION) { 1765 ++pim6stat.pim6s_rcv_badversion; 1766 #ifdef MRT6DEBUG 1767 log(LOG_ERR, 1768 "pim6_input: incorrect version %d, expecting %d\n", 1769 pim->pim_ver, PIM_VERSION); 1770 #endif 1771 m_freem(m); 1772 return (IPPROTO_DONE); 1773 } 1774 1775 #define PIM6_CHECKSUM 1776 #ifdef PIM6_CHECKSUM 1777 { 1778 int cksumlen; 1779 1780 /* 1781 * Validate checksum. 1782 * If PIM REGISTER, exclude the data packet 1783 */ 1784 if (pim->pim_type == PIM_REGISTER) 1785 cksumlen = PIM_MINLEN; 1786 else 1787 cksumlen = pimlen; 1788 1789 if (in6_cksum(m, IPPROTO_PIM, off, cksumlen)) { 1790 ++pim6stat.pim6s_rcv_badsum; 1791 #ifdef MRT6DEBUG 1792 if (mrt6debug & DEBUG_PIM) 1793 log(LOG_DEBUG, 1794 "pim6_input: invalid checksum\n"); 1795 #endif 1796 m_freem(m); 1797 return (IPPROTO_DONE); 1798 } 1799 } 1800 #endif /* PIM_CHECKSUM */ 1801 1802 if (pim->pim_type == PIM_REGISTER) { 1803 /* 1804 * since this is a REGISTER, we'll make a copy of the register 1805 * headers ip6+pim+u_int32_t+encap_ip6, to be passed up to the 1806 * routing daemon. 1807 */ 1808 static struct sockaddr_in6 dst = { sizeof(dst), AF_INET6 }; 1809 1810 struct mbuf *mcp; 1811 struct ip6_hdr *eip6; 1812 u_int32_t *reghdr; 1813 1814 ++pim6stat.pim6s_rcv_registers; 1815 1816 if ((reg_mif_num >= nummifs) || (reg_mif_num == (mifi_t) -1)) { 1817 #ifdef MRT6DEBUG 1818 if (mrt6debug & DEBUG_PIM) 1819 log(LOG_DEBUG, 1820 "pim6_input: register mif not set: %d\n", 1821 reg_mif_num); 1822 #endif 1823 m_freem(m); 1824 return (IPPROTO_DONE); 1825 } 1826 1827 reghdr = (u_int32_t *)(pim + 1); 1828 1829 if ((ntohl(*reghdr) & PIM_NULL_REGISTER)) 1830 goto pim6_input_to_daemon; 1831 1832 /* 1833 * Validate length 1834 */ 1835 if (pimlen < PIM6_REG_MINLEN) { 1836 ++pim6stat.pim6s_rcv_tooshort; 1837 ++pim6stat.pim6s_rcv_badregisters; 1838 #ifdef MRT6DEBUG 1839 log(LOG_ERR, 1840 "pim6_input: register packet size too " 1841 "small %d from %s\n", 1842 pimlen, ip6_sprintf(&ip6->ip6_src)); 1843 #endif 1844 m_freem(m); 1845 return (IPPROTO_DONE); 1846 } 1847 1848 eip6 = (struct ip6_hdr *) (reghdr + 1); 1849 #ifdef MRT6DEBUG 1850 if (mrt6debug & DEBUG_PIM) 1851 log(LOG_DEBUG, 1852 "pim6_input[register], eip6: %s -> %s, " 1853 "eip6 plen %d\n", 1854 ip6_sprintf(&eip6->ip6_src), 1855 ip6_sprintf(&eip6->ip6_dst), 1856 ntohs(eip6->ip6_plen)); 1857 #endif 1858 1859 /* verify the version number of the inner packet */ 1860 if ((eip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) { 1861 ++pim6stat.pim6s_rcv_badregisters; 1862 #ifdef MRT6DEBUG 1863 log(LOG_DEBUG, "pim6_input: invalid IP version (%d) " 1864 "of the inner packet\n", 1865 (eip6->ip6_vfc & IPV6_VERSION)); 1866 #endif 1867 m_freem(m); 1868 return (IPPROTO_NONE); 1869 } 1870 1871 /* verify the inner packet is destined to a mcast group */ 1872 if (!IN6_IS_ADDR_MULTICAST(&eip6->ip6_dst)) { 1873 ++pim6stat.pim6s_rcv_badregisters; 1874 #ifdef MRT6DEBUG 1875 if (mrt6debug & DEBUG_PIM) 1876 log(LOG_DEBUG, 1877 "pim6_input: inner packet of register " 1878 "is not multicast %s\n", 1879 ip6_sprintf(&eip6->ip6_dst)); 1880 #endif 1881 m_freem(m); 1882 return (IPPROTO_DONE); 1883 } 1884 1885 /* 1886 * make a copy of the whole header to pass to the daemon later. 1887 */ 1888 mcp = m_copy(m, 0, off + PIM6_REG_MINLEN); 1889 if (mcp == NULL) { 1890 #ifdef MRT6DEBUG 1891 log(LOG_ERR, 1892 "pim6_input: pim register: " 1893 "could not copy register head\n"); 1894 #endif 1895 m_freem(m); 1896 return (IPPROTO_DONE); 1897 } 1898 1899 /* 1900 * forward the inner ip6 packet; point m_data at the inner ip6. 1901 */ 1902 m_adj(m, off + PIM_MINLEN); 1903 #ifdef MRT6DEBUG 1904 if (mrt6debug & DEBUG_PIM) { 1905 log(LOG_DEBUG, 1906 "pim6_input: forwarding decapsulated register: " 1907 "src %s, dst %s, mif %d\n", 1908 ip6_sprintf(&eip6->ip6_src), 1909 ip6_sprintf(&eip6->ip6_dst), 1910 reg_mif_num); 1911 } 1912 #endif 1913 1914 looutput(mif6table[reg_mif_num].m6_ifp, m, 1915 (struct sockaddr *) &dst, 1916 (struct rtentry *) NULL); 1917 1918 /* prepare the register head to send to the mrouting daemon */ 1919 m = mcp; 1920 } 1921 1922 /* 1923 * Pass the PIM message up to the daemon; if it is a register message 1924 * pass the 'head' only up to the daemon. This includes the 1925 * encapsulator ip6 header, pim header, register header and the 1926 * encapsulated ip6 header. 1927 */ 1928 pim6_input_to_daemon: 1929 rip6_input(&m, offp, proto); 1930 return (IPPROTO_DONE); 1931 } 1932 1933 SYSCTL_SETUP(sysctl_net_inet6_pim6_setup, "sysctl net.inet6.pim6 subtree setup") 1934 { 1935 sysctl_createv(clog, 0, NULL, NULL, 1936 CTLFLAG_PERMANENT, 1937 CTLTYPE_NODE, "net", NULL, 1938 NULL, 0, NULL, 0, 1939 CTL_NET, CTL_EOL); 1940 sysctl_createv(clog, 0, NULL, NULL, 1941 CTLFLAG_PERMANENT, 1942 CTLTYPE_NODE, "inet6", NULL, 1943 NULL, 0, NULL, 0, 1944 CTL_NET, PF_INET6, CTL_EOL); 1945 sysctl_createv(clog, 0, NULL, NULL, 1946 CTLFLAG_PERMANENT, 1947 CTLTYPE_NODE, "pim6", 1948 SYSCTL_DESCR("PIMv6 settings"), 1949 NULL, 0, NULL, 0, 1950 CTL_NET, PF_INET6, IPPROTO_PIM, CTL_EOL); 1951 1952 sysctl_createv(clog, 0, NULL, NULL, 1953 CTLFLAG_PERMANENT, 1954 CTLTYPE_STRUCT, "stats", 1955 SYSCTL_DESCR("PIMv6 statistics"), 1956 NULL, 0, &pim6stat, sizeof(pim6stat), 1957 CTL_NET, PF_INET6, IPPROTO_PIM, PIM6CTL_STATS, 1958 CTL_EOL); 1959 } 1960