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sys/netinet6/ip6_mroute.c
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1 /* $NetBSD: ip6_mroute.c,v 1.76 2006/11/16 01:33:45 christos Exp $ */ 2 /* $KAME: ip6_mroute.c,v 1.49 2001/07/25 09:21:18 jinmei Exp $ */ 3 4 /* 5 * Copyright (C) 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* BSDI ip_mroute.c,v 2.10 1996/11/14 00:29:52 jch Exp */ 34 35 /* 36 * Copyright (c) 1992, 1993 37 * The Regents of the University of California. All rights reserved. 38 * 39 * This code is derived from software contributed to Berkeley by 40 * Stephen Deering of Stanford University. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. Neither the name of the University nor the names of its contributors 51 * may be used to endorse or promote products derived from this software 52 * without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 64 * SUCH DAMAGE. 65 * 66 * @(#)ip_mroute.c 8.2 (Berkeley) 11/15/93 67 */ 68 69 /* 70 * Copyright (c) 1989 Stephen Deering 71 * 72 * This code is derived from software contributed to Berkeley by 73 * Stephen Deering of Stanford University. 74 * 75 * Redistribution and use in source and binary forms, with or without 76 * modification, are permitted provided that the following conditions 77 * are met: 78 * 1. Redistributions of source code must retain the above copyright 79 * notice, this list of conditions and the following disclaimer. 80 * 2. Redistributions in binary form must reproduce the above copyright 81 * notice, this list of conditions and the following disclaimer in the 82 * documentation and/or other materials provided with the distribution. 83 * 3. All advertising materials mentioning features or use of this software 84 * must display the following acknowledgement: 85 * This product includes software developed by the University of 86 * California, Berkeley and its contributors. 87 * 4. Neither the name of the University nor the names of its contributors 88 * may be used to endorse or promote products derived from this software 89 * without specific prior written permission. 90 * 91 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 92 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 93 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 94 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 95 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 96 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 97 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 98 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 99 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 100 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 101 * SUCH DAMAGE. 102 * 103 * @(#)ip_mroute.c 8.2 (Berkeley) 11/15/93 104 */ 105 106 /* 107 * IP multicast forwarding procedures 108 * 109 * Written by David Waitzman, BBN Labs, August 1988. 110 * Modified by Steve Deering, Stanford, February 1989. 111 * Modified by Mark J. Steiglitz, Stanford, May, 1991 112 * Modified by Van Jacobson, LBL, January 1993 113 * Modified by Ajit Thyagarajan, PARC, August 1993 114 * Modified by Bill Fenner, PARC, April 1994 115 * 116 * MROUTING Revision: 3.5.1.2 + PIM-SMv2 (pimd) Support 117 */ 118 119 #include <sys/cdefs.h> 120 __KERNEL_RCSID(0, "$NetBSD: ip6_mroute.c,v 1.76 2006/11/16 01:33:45 christos Exp $"); 121 122 #include "opt_inet.h" 123 #include "opt_mrouting.h" 124 125 #include <sys/param.h> 126 #include <sys/systm.h> 127 #include <sys/callout.h> 128 #include <sys/mbuf.h> 129 #include <sys/socket.h> 130 #include <sys/socketvar.h> 131 #include <sys/sockio.h> 132 #include <sys/protosw.h> 133 #include <sys/errno.h> 134 #include <sys/time.h> 135 #include <sys/kernel.h> 136 #include <sys/ioctl.h> 137 #include <sys/sysctl.h> 138 #include <sys/syslog.h> 139 140 #include <net/if.h> 141 #include <net/route.h> 142 #include <net/raw_cb.h> 143 144 #include <netinet/in.h> 145 #include <netinet/in_var.h> 146 #include <netinet/icmp6.h> 147 148 #include <netinet/ip6.h> 149 #include <netinet6/ip6_var.h> 150 #include <netinet6/ip6_mroute.h> 151 #include <netinet6/scope6_var.h> 152 #include <netinet6/pim6.h> 153 #include <netinet6/pim6_var.h> 154 #include <netinet6/nd6.h> 155 156 #include <net/net_osdep.h> 157 158 static int ip6_mdq __P((struct mbuf *, struct ifnet *, struct mf6c *)); 159 static void phyint_send __P((struct ip6_hdr *, struct mif6 *, struct mbuf *)); 160 161 static int set_pim6 __P((int *)); 162 static int get_pim6 __P((struct mbuf *)); 163 static int socket_send __P((struct socket *, struct mbuf *, 164 struct sockaddr_in6 *)); 165 static int register_send __P((struct ip6_hdr *, struct mif6 *, struct mbuf *)); 166 167 /* 168 * Globals. All but ip6_mrouter, ip6_mrtproto and mrt6stat could be static, 169 * except for netstat or debugging purposes. 170 */ 171 struct socket *ip6_mrouter = NULL; 172 int ip6_mrouter_ver = 0; 173 int ip6_mrtproto = IPPROTO_PIM; /* for netstat only */ 174 struct mrt6stat mrt6stat; 175 176 #define NO_RTE_FOUND 0x1 177 #define RTE_FOUND 0x2 178 179 struct mf6c *mf6ctable[MF6CTBLSIZ]; 180 u_char n6expire[MF6CTBLSIZ]; 181 struct mif6 mif6table[MAXMIFS]; 182 #ifdef MRT6DEBUG 183 u_int mrt6debug = 0; /* debug level */ 184 #define DEBUG_MFC 0x02 185 #define DEBUG_FORWARD 0x04 186 #define DEBUG_EXPIRE 0x08 187 #define DEBUG_XMIT 0x10 188 #define DEBUG_REG 0x20 189 #define DEBUG_PIM 0x40 190 #endif 191 192 static void expire_upcalls __P((void *)); 193 #define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */ 194 #define UPCALL_EXPIRE 6 /* number of timeouts */ 195 196 #ifdef INET 197 #ifdef MROUTING 198 extern struct socket *ip_mrouter; 199 #endif 200 #endif 201 202 /* 203 * 'Interfaces' associated with decapsulator (so we can tell 204 * packets that went through it from ones that get reflected 205 * by a broken gateway). These interfaces are never linked into 206 * the system ifnet list & no routes point to them. I.e., packets 207 * can't be sent this way. They only exist as a placeholder for 208 * multicast source verification. 209 */ 210 struct ifnet multicast_register_if6; 211 212 #define ENCAP_HOPS 64 213 214 /* 215 * Private variables. 216 */ 217 static mifi_t nummifs = 0; 218 static mifi_t reg_mif_num = (mifi_t)-1; 219 220 struct pim6stat pim6stat; 221 static int pim6; 222 223 /* 224 * Hash function for a source, group entry 225 */ 226 #define MF6CHASH(a, g) MF6CHASHMOD((a).s6_addr32[0] ^ (a).s6_addr32[1] ^ \ 227 (a).s6_addr32[2] ^ (a).s6_addr32[3] ^ \ 228 (g).s6_addr32[0] ^ (g).s6_addr32[1] ^ \ 229 (g).s6_addr32[2] ^ (g).s6_addr32[3]) 230 231 /* 232 * Find a route for a given origin IPv6 address and Multicast group address. 233 * Quality of service parameter to be added in the future!!! 234 */ 235 236 #define MF6CFIND(o, g, rt) do { \ 237 struct mf6c *_rt = mf6ctable[MF6CHASH(o,g)]; \ 238 rt = NULL; \ 239 mrt6stat.mrt6s_mfc_lookups++; \ 240 while (_rt) { \ 241 if (IN6_ARE_ADDR_EQUAL(&_rt->mf6c_origin.sin6_addr, &(o)) && \ 242 IN6_ARE_ADDR_EQUAL(&_rt->mf6c_mcastgrp.sin6_addr, &(g)) && \ 243 (_rt->mf6c_stall == NULL)) { \ 244 rt = _rt; \ 245 break; \ 246 } \ 247 _rt = _rt->mf6c_next; \ 248 } \ 249 if (rt == NULL) { \ 250 mrt6stat.mrt6s_mfc_misses++; \ 251 } \ 252 } while (/*CONSTCOND*/ 0) 253 254 /* 255 * Macros to compute elapsed time efficiently 256 * Borrowed from Van Jacobson's scheduling code 257 */ 258 #define TV_DELTA(a, b, delta) do { \ 259 int xxs; \ 260 \ 261 delta = (a).tv_usec - (b).tv_usec; \ 262 if ((xxs = (a).tv_sec - (b).tv_sec)) { \ 263 switch (xxs) { \ 264 case 2: \ 265 delta += 1000000; \ 266 /* FALLTHROUGH */ \ 267 case 1: \ 268 delta += 1000000; \ 269 break; \ 270 default: \ 271 delta += (1000000 * xxs); \ 272 } \ 273 } \ 274 } while (/*CONSTCOND*/ 0) 275 276 #define TV_LT(a, b) (((a).tv_usec < (b).tv_usec && \ 277 (a).tv_sec <= (b).tv_sec) || (a).tv_sec < (b).tv_sec) 278 279 #ifdef UPCALL_TIMING 280 #define UPCALL_MAX 50 281 u_long upcall_data[UPCALL_MAX + 1]; 282 static void collate(); 283 #endif /* UPCALL_TIMING */ 284 285 static int get_sg_cnt __P((struct sioc_sg_req6 *)); 286 static int get_mif6_cnt __P((struct sioc_mif_req6 *)); 287 static int ip6_mrouter_init __P((struct socket *, int, int)); 288 static int add_m6if __P((struct mif6ctl *)); 289 static int del_m6if __P((mifi_t *)); 290 static int add_m6fc __P((struct mf6cctl *)); 291 static int del_m6fc __P((struct mf6cctl *)); 292 293 static struct callout expire_upcalls_ch = CALLOUT_INITIALIZER; 294 295 /* 296 * Handle MRT setsockopt commands to modify the multicast routing tables. 297 */ 298 int 299 ip6_mrouter_set(cmd, so, m) 300 int cmd; 301 struct socket *so; 302 struct mbuf *m; 303 { 304 if (cmd != MRT6_INIT && so != ip6_mrouter) 305 return (EACCES); 306 307 switch (cmd) { 308 #ifdef MRT6_OINIT 309 case MRT6_OINIT: 310 #endif 311 case MRT6_INIT: 312 if (m == NULL || m->m_len < sizeof(int)) 313 return (EINVAL); 314 return (ip6_mrouter_init(so, *mtod(m, int *), cmd)); 315 case MRT6_DONE: 316 return (ip6_mrouter_done()); 317 case MRT6_ADD_MIF: 318 if (m == NULL || m->m_len < sizeof(struct mif6ctl)) 319 return (EINVAL); 320 return (add_m6if(mtod(m, struct mif6ctl *))); 321 case MRT6_DEL_MIF: 322 if (m == NULL || m->m_len < sizeof(mifi_t)) 323 return (EINVAL); 324 return (del_m6if(mtod(m, mifi_t *))); 325 case MRT6_ADD_MFC: 326 if (m == NULL || m->m_len < sizeof(struct mf6cctl)) 327 return (EINVAL); 328 return (add_m6fc(mtod(m, struct mf6cctl *))); 329 case MRT6_DEL_MFC: 330 if (m == NULL || m->m_len < sizeof(struct mf6cctl)) 331 return (EINVAL); 332 return (del_m6fc(mtod(m, struct mf6cctl *))); 333 case MRT6_PIM: 334 if (m == NULL || m->m_len < sizeof(int)) 335 return (EINVAL); 336 return (set_pim6(mtod(m, int *))); 337 default: 338 return (EOPNOTSUPP); 339 } 340 } 341 342 /* 343 * Handle MRT getsockopt commands 344 */ 345 int 346 ip6_mrouter_get(cmd, so, m) 347 int cmd; 348 struct socket *so; 349 struct mbuf **m; 350 { 351 struct mbuf *mb; 352 353 if (so != ip6_mrouter) return EACCES; 354 355 *m = mb = m_get(M_WAIT, MT_SOOPTS); 356 357 switch (cmd) { 358 case MRT6_PIM: 359 return get_pim6(mb); 360 default: 361 m_free(mb); 362 return EOPNOTSUPP; 363 } 364 } 365 366 /* 367 * Handle ioctl commands to obtain information from the cache 368 */ 369 int 370 mrt6_ioctl(cmd, data) 371 int cmd; 372 caddr_t data; 373 { 374 375 switch (cmd) { 376 case SIOCGETSGCNT_IN6: 377 return (get_sg_cnt((struct sioc_sg_req6 *)data)); 378 case SIOCGETMIFCNT_IN6: 379 return (get_mif6_cnt((struct sioc_mif_req6 *)data)); 380 default: 381 return (EINVAL); 382 } 383 } 384 385 /* 386 * returns the packet, byte, rpf-failure count for the source group provided 387 */ 388 static int 389 get_sg_cnt(req) 390 struct sioc_sg_req6 *req; 391 { 392 struct mf6c *rt; 393 int s; 394 395 s = splsoftnet(); 396 MF6CFIND(req->src.sin6_addr, req->grp.sin6_addr, rt); 397 splx(s); 398 if (rt != NULL) { 399 req->pktcnt = rt->mf6c_pkt_cnt; 400 req->bytecnt = rt->mf6c_byte_cnt; 401 req->wrong_if = rt->mf6c_wrong_if; 402 } else 403 return (ESRCH); 404 #if 0 405 req->pktcnt = req->bytecnt = req->wrong_if = 0xffffffff; 406 #endif 407 408 return 0; 409 } 410 411 /* 412 * returns the input and output packet and byte counts on the mif provided 413 */ 414 static int 415 get_mif6_cnt(req) 416 struct sioc_mif_req6 *req; 417 { 418 mifi_t mifi = req->mifi; 419 420 if (mifi >= nummifs) 421 return EINVAL; 422 423 req->icount = mif6table[mifi].m6_pkt_in; 424 req->ocount = mif6table[mifi].m6_pkt_out; 425 req->ibytes = mif6table[mifi].m6_bytes_in; 426 req->obytes = mif6table[mifi].m6_bytes_out; 427 428 return 0; 429 } 430 431 /* 432 * Get PIM processiong global 433 */ 434 static int 435 get_pim6(m) 436 struct mbuf *m; 437 { 438 int *i; 439 440 i = mtod(m, int *); 441 442 *i = pim6; 443 444 return 0; 445 } 446 447 static int 448 set_pim6(i) 449 int *i; 450 { 451 if ((*i != 1) && (*i != 0)) 452 return EINVAL; 453 454 pim6 = *i; 455 456 return 0; 457 } 458 459 /* 460 * Enable multicast routing 461 */ 462 static int 463 ip6_mrouter_init(so, v, cmd) 464 struct socket *so; 465 int v; 466 int cmd; 467 { 468 #ifdef MRT6DEBUG 469 if (mrt6debug) 470 log(LOG_DEBUG, 471 "ip6_mrouter_init: so_type = %d, pr_protocol = %d\n", 472 so->so_type, so->so_proto->pr_protocol); 473 #endif 474 475 if (so->so_type != SOCK_RAW || 476 so->so_proto->pr_protocol != IPPROTO_ICMPV6) 477 return (EOPNOTSUPP); 478 479 if (v != 1) 480 return (ENOPROTOOPT); 481 482 if (ip6_mrouter != NULL) 483 return (EADDRINUSE); 484 485 ip6_mrouter = so; 486 ip6_mrouter_ver = cmd; 487 488 bzero((caddr_t)mf6ctable, sizeof(mf6ctable)); 489 bzero((caddr_t)n6expire, sizeof(n6expire)); 490 491 pim6 = 0;/* used for stubbing out/in pim stuff */ 492 493 callout_init(&expire_upcalls_ch); 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 register interface 584 */ 585 if (reg_mif_num != (mifi_t)-1) { 586 if_detach(&multicast_register_if6); 587 reg_mif_num = (mifi_t)-1; 588 } 589 590 ip6_mrouter = NULL; 591 ip6_mrouter_ver = 0; 592 593 splx(s); 594 595 #ifdef MRT6DEBUG 596 if (mrt6debug) 597 log(LOG_DEBUG, "ip6_mrouter_done\n"); 598 #endif 599 600 return 0; 601 } 602 603 void 604 ip6_mrouter_detach(ifp) 605 struct ifnet *ifp; 606 { 607 struct rtdetq *rte; 608 struct mf6c *mfc; 609 mifi_t mifi; 610 int i; 611 612 if (ip6_mrouter == NULL) 613 return; 614 615 /* 616 * Delete a mif which points to ifp. 617 */ 618 for (mifi = 0; mifi < nummifs; mifi++) 619 if (mif6table[mifi].m6_ifp == ifp) 620 del_m6if(&mifi); 621 622 /* 623 * Clear rte->ifp of cache entries received on ifp. 624 */ 625 for (i = 0; i < MF6CTBLSIZ; i++) { 626 if (n6expire[i] == 0) 627 continue; 628 629 for (mfc = mf6ctable[i]; mfc != NULL; mfc = mfc->mf6c_next) { 630 for (rte = mfc->mf6c_stall; rte != NULL; rte = rte->next) { 631 if (rte->ifp == ifp) 632 rte->ifp = NULL; 633 } 634 } 635 } 636 } 637 638 639 /* 640 * Add a mif to the mif table 641 */ 642 static int 643 add_m6if(mifcp) 644 struct mif6ctl *mifcp; 645 { 646 struct mif6 *mifp; 647 struct ifnet *ifp; 648 struct in6_ifreq ifr; 649 int error, s; 650 #ifdef notyet 651 struct tbf *m_tbf = tbftable + mifcp->mif6c_mifi; 652 #endif 653 654 if (mifcp->mif6c_mifi >= MAXMIFS) 655 return EINVAL; 656 mifp = mif6table + mifcp->mif6c_mifi; 657 if (mifp->m6_ifp) 658 return EADDRINUSE; /* XXX: is it appropriate? */ 659 if (mifcp->mif6c_pifi == 0 || mifcp->mif6c_pifi >= if_indexlim) 660 return ENXIO; 661 /* 662 * XXX: some OSes can remove ifp and clear ifindex2ifnet[id] 663 * even for id between 0 and if_index. 664 */ 665 if ((ifp = ifindex2ifnet[mifcp->mif6c_pifi]) == NULL) 666 return ENXIO; 667 668 if (mifcp->mif6c_flags & MIFF_REGISTER) { 669 ifp = &multicast_register_if6; 670 671 if (reg_mif_num == (mifi_t)-1) { 672 strlcpy(ifp->if_xname, "register_mif", 673 sizeof(ifp->if_xname)); 674 ifp->if_flags |= IFF_LOOPBACK; 675 ifp->if_index = mifcp->mif6c_mifi; 676 reg_mif_num = mifcp->mif6c_mifi; 677 if_attach(ifp); 678 } 679 680 } /* if REGISTER */ 681 else { 682 /* Make sure the interface supports multicast */ 683 if ((ifp->if_flags & IFF_MULTICAST) == 0) 684 return EOPNOTSUPP; 685 686 s = splsoftnet(); 687 /* 688 * Enable promiscuous reception of all IPv6 multicasts 689 * from the interface. 690 */ 691 ifr.ifr_addr.sin6_family = AF_INET6; 692 ifr.ifr_addr.sin6_addr = in6addr_any; 693 error = (*ifp->if_ioctl)(ifp, SIOCADDMULTI, (caddr_t)&ifr); 694 splx(s); 695 if (error) 696 return error; 697 } 698 699 s = splsoftnet(); 700 mifp->m6_flags = mifcp->mif6c_flags; 701 mifp->m6_ifp = ifp; 702 #ifdef notyet 703 /* scaling up here allows division by 1024 in critical code */ 704 mifp->m6_rate_limit = mifcp->mif6c_rate_limit * 1024 / 1000; 705 #endif 706 /* initialize per mif pkt counters */ 707 mifp->m6_pkt_in = 0; 708 mifp->m6_pkt_out = 0; 709 mifp->m6_bytes_in = 0; 710 mifp->m6_bytes_out = 0; 711 splx(s); 712 713 /* Adjust nummifs up if the mifi is higher than nummifs */ 714 if (nummifs <= mifcp->mif6c_mifi) 715 nummifs = mifcp->mif6c_mifi + 1; 716 717 #ifdef MRT6DEBUG 718 if (mrt6debug) 719 log(LOG_DEBUG, 720 "add_mif #%d, phyint %s\n", 721 mifcp->mif6c_mifi, ifp->if_xname); 722 #endif 723 724 return 0; 725 } 726 727 /* 728 * Delete a mif from the mif table 729 */ 730 static int 731 del_m6if(mifip) 732 mifi_t *mifip; 733 { 734 struct mif6 *mifp = mif6table + *mifip; 735 mifi_t mifi; 736 struct ifnet *ifp; 737 struct in6_ifreq ifr; 738 int s; 739 740 if (*mifip >= nummifs) 741 return EINVAL; 742 if (mifp->m6_ifp == NULL) 743 return EINVAL; 744 745 s = splsoftnet(); 746 747 if (!(mifp->m6_flags & MIFF_REGISTER)) { 748 /* 749 * XXX: what if there is yet IPv4 multicast daemon 750 * using the interface? 751 */ 752 ifp = mifp->m6_ifp; 753 754 ifr.ifr_addr.sin6_family = AF_INET6; 755 ifr.ifr_addr.sin6_addr = in6addr_any; 756 (*ifp->if_ioctl)(ifp, SIOCDELMULTI, (caddr_t)&ifr); 757 } else { 758 if (reg_mif_num != (mifi_t)-1) { 759 if_detach(&multicast_register_if6); 760 reg_mif_num = (mifi_t)-1; 761 } 762 } 763 764 #ifdef notyet 765 bzero((caddr_t)qtable[*mifip], sizeof(qtable[*mifip])); 766 bzero((caddr_t)mifp->m6_tbf, sizeof(*(mifp->m6_tbf))); 767 #endif 768 bzero((caddr_t)mifp, sizeof (*mifp)); 769 770 /* Adjust nummifs down */ 771 for (mifi = nummifs; mifi > 0; mifi--) 772 if (mif6table[mifi - 1].m6_ifp) 773 break; 774 nummifs = mifi; 775 776 splx(s); 777 778 #ifdef MRT6DEBUG 779 if (mrt6debug) 780 log(LOG_DEBUG, "del_m6if %d, nummifs %d\n", *mifip, nummifs); 781 #endif 782 783 return 0; 784 } 785 786 /* 787 * Add an mfc entry 788 */ 789 static int 790 add_m6fc(mfccp) 791 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(t) 949 struct timeval *t; 950 { 951 u_long d; 952 struct timeval tp; 953 u_long delta; 954 955 GET_TIME(tp); 956 957 if (TV_LT(*t, tp)) 958 { 959 TV_DELTA(tp, *t, delta); 960 961 d = delta >> 10; 962 if (d > UPCALL_MAX) 963 d = UPCALL_MAX; 964 965 ++upcall_data[d]; 966 } 967 } 968 #endif /* UPCALL_TIMING */ 969 970 /* 971 * Delete an mfc entry 972 */ 973 static int 974 del_m6fc(mfccp) 975 struct mf6cctl *mfccp; 976 { 977 struct sockaddr_in6 origin; 978 struct sockaddr_in6 mcastgrp; 979 struct mf6c *rt; 980 struct mf6c **nptr; 981 u_long hash; 982 int s; 983 984 origin = mfccp->mf6cc_origin; 985 mcastgrp = mfccp->mf6cc_mcastgrp; 986 hash = MF6CHASH(origin.sin6_addr, mcastgrp.sin6_addr); 987 988 #ifdef MRT6DEBUG 989 if (mrt6debug & DEBUG_MFC) 990 log(LOG_DEBUG,"del_m6fc orig %s mcastgrp %s\n", 991 ip6_sprintf(&origin.sin6_addr), 992 ip6_sprintf(&mcastgrp.sin6_addr)); 993 #endif 994 995 s = splsoftnet(); 996 997 nptr = &mf6ctable[hash]; 998 while ((rt = *nptr) != NULL) { 999 if (IN6_ARE_ADDR_EQUAL(&origin.sin6_addr, 1000 &rt->mf6c_origin.sin6_addr) && 1001 IN6_ARE_ADDR_EQUAL(&mcastgrp.sin6_addr, 1002 &rt->mf6c_mcastgrp.sin6_addr) && 1003 rt->mf6c_stall == NULL) 1004 break; 1005 1006 nptr = &rt->mf6c_next; 1007 } 1008 if (rt == NULL) { 1009 splx(s); 1010 return EADDRNOTAVAIL; 1011 } 1012 1013 *nptr = rt->mf6c_next; 1014 free(rt, M_MRTABLE); 1015 1016 splx(s); 1017 1018 return 0; 1019 } 1020 1021 static int 1022 socket_send(s, mm, src) 1023 struct socket *s; 1024 struct mbuf *mm; 1025 struct sockaddr_in6 *src; 1026 { 1027 if (s) { 1028 if (sbappendaddr(&s->so_rcv, 1029 (struct sockaddr *)src, 1030 mm, (struct mbuf *)0) != 0) { 1031 sorwakeup(s); 1032 return 0; 1033 } 1034 } 1035 m_freem(mm); 1036 return -1; 1037 } 1038 1039 /* 1040 * IPv6 multicast forwarding function. This function assumes that the packet 1041 * pointed to by "ip6" has arrived on (or is about to be sent to) the interface 1042 * pointed to by "ifp", and the packet is to be relayed to other networks 1043 * that have members of the packet's destination IPv6 multicast group. 1044 * 1045 * The packet is returned unscathed to the caller, unless it is 1046 * erroneous, in which case a non-zero return value tells the caller to 1047 * discard it. 1048 */ 1049 1050 int 1051 ip6_mforward(ip6, ifp, m) 1052 struct ip6_hdr *ip6; 1053 struct ifnet *ifp; 1054 struct mbuf *m; 1055 { 1056 struct mf6c *rt; 1057 struct mif6 *mifp; 1058 struct mbuf *mm; 1059 int s; 1060 mifi_t mifi; 1061 struct sockaddr_in6 sin6; 1062 1063 #ifdef MRT6DEBUG 1064 if (mrt6debug & DEBUG_FORWARD) 1065 log(LOG_DEBUG, "ip6_mforward: src %s, dst %s, ifindex %d\n", 1066 ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst), 1067 ifp->if_index); 1068 #endif 1069 1070 /* 1071 * Don't forward a packet with Hop limit of zero or one, 1072 * or a packet destined to a local-only group. 1073 */ 1074 if (ip6->ip6_hlim <= 1 || IN6_IS_ADDR_MC_NODELOCAL(&ip6->ip6_dst) || 1075 IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst)) 1076 return 0; 1077 ip6->ip6_hlim--; 1078 1079 /* 1080 * Source address check: do not forward packets with unspecified 1081 * source. It was discussed in July 2000, on ipngwg mailing list. 1082 * This is rather more serious than unicast cases, because some 1083 * MLD packets can be sent with the unspecified source address 1084 * (although such packets must normally set the hop limit field to 1). 1085 */ 1086 if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) { 1087 ip6stat.ip6s_cantforward++; 1088 if (ip6_log_time + ip6_log_interval < time_second) { 1089 ip6_log_time = time_second; 1090 log(LOG_DEBUG, 1091 "cannot forward " 1092 "from %s to %s nxt %d received on %s\n", 1093 ip6_sprintf(&ip6->ip6_src), 1094 ip6_sprintf(&ip6->ip6_dst), 1095 ip6->ip6_nxt, 1096 m->m_pkthdr.rcvif ? 1097 if_name(m->m_pkthdr.rcvif) : "?"); 1098 } 1099 return 0; 1100 } 1101 1102 /* 1103 * Determine forwarding mifs from the forwarding cache table 1104 */ 1105 s = splsoftnet(); 1106 MF6CFIND(ip6->ip6_src, ip6->ip6_dst, rt); 1107 1108 /* Entry exists, so forward if necessary */ 1109 if (rt) { 1110 splx(s); 1111 return (ip6_mdq(m, ifp, rt)); 1112 } else { 1113 /* 1114 * If we don't have a route for packet's origin, 1115 * Make a copy of the packet & 1116 * send message to routing daemon 1117 */ 1118 1119 struct mbuf *mb0; 1120 struct rtdetq *rte; 1121 u_long hash; 1122 /* int i, npkts;*/ 1123 #ifdef UPCALL_TIMING 1124 struct timeval tp; 1125 1126 GET_TIME(tp); 1127 #endif /* UPCALL_TIMING */ 1128 1129 mrt6stat.mrt6s_no_route++; 1130 #ifdef MRT6DEBUG 1131 if (mrt6debug & (DEBUG_FORWARD | DEBUG_MFC)) 1132 log(LOG_DEBUG, "ip6_mforward: no rte s %s g %s\n", 1133 ip6_sprintf(&ip6->ip6_src), 1134 ip6_sprintf(&ip6->ip6_dst)); 1135 #endif 1136 1137 /* 1138 * Allocate mbufs early so that we don't do extra work if we 1139 * are just going to fail anyway. 1140 */ 1141 rte = (struct rtdetq *)malloc(sizeof(*rte), M_MRTABLE, 1142 M_NOWAIT); 1143 if (rte == NULL) { 1144 splx(s); 1145 return ENOBUFS; 1146 } 1147 mb0 = m_copy(m, 0, M_COPYALL); 1148 /* 1149 * Pullup packet header if needed before storing it, 1150 * as other references may modify it in the meantime. 1151 */ 1152 if (mb0 && 1153 (M_READONLY(mb0) || mb0->m_len < sizeof(struct ip6_hdr))) 1154 mb0 = m_pullup(mb0, sizeof(struct ip6_hdr)); 1155 if (mb0 == NULL) { 1156 free(rte, M_MRTABLE); 1157 splx(s); 1158 return ENOBUFS; 1159 } 1160 1161 /* is there an upcall waiting for this packet? */ 1162 hash = MF6CHASH(ip6->ip6_src, ip6->ip6_dst); 1163 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 1164 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, 1165 &rt->mf6c_origin.sin6_addr) && 1166 IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, 1167 &rt->mf6c_mcastgrp.sin6_addr) && 1168 (rt->mf6c_stall != NULL)) 1169 break; 1170 } 1171 1172 if (rt == NULL) { 1173 struct mrt6msg *im; 1174 struct omrt6msg *oim; 1175 1176 /* no upcall, so make a new entry */ 1177 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE, 1178 M_NOWAIT); 1179 if (rt == NULL) { 1180 free(rte, M_MRTABLE); 1181 m_freem(mb0); 1182 splx(s); 1183 return ENOBUFS; 1184 } 1185 /* 1186 * Make a copy of the header to send to the user 1187 * level process 1188 */ 1189 mm = m_copy(mb0, 0, sizeof(struct ip6_hdr)); 1190 1191 if (mm == NULL) { 1192 free(rte, M_MRTABLE); 1193 m_freem(mb0); 1194 free(rt, M_MRTABLE); 1195 splx(s); 1196 return ENOBUFS; 1197 } 1198 1199 /* 1200 * Send message to routing daemon 1201 */ 1202 (void)memset(&sin6, 0, sizeof(sin6)); 1203 sin6.sin6_len = sizeof(sin6); 1204 sin6.sin6_family = AF_INET6; 1205 sin6.sin6_addr = ip6->ip6_src; 1206 1207 im = NULL; 1208 oim = NULL; 1209 switch (ip6_mrouter_ver) { 1210 case MRT6_OINIT: 1211 oim = mtod(mm, struct omrt6msg *); 1212 oim->im6_msgtype = MRT6MSG_NOCACHE; 1213 oim->im6_mbz = 0; 1214 break; 1215 case MRT6_INIT: 1216 im = mtod(mm, struct mrt6msg *); 1217 im->im6_msgtype = MRT6MSG_NOCACHE; 1218 im->im6_mbz = 0; 1219 break; 1220 default: 1221 free(rte, M_MRTABLE); 1222 m_freem(mb0); 1223 free(rt, M_MRTABLE); 1224 splx(s); 1225 return EINVAL; 1226 } 1227 1228 #ifdef MRT6DEBUG 1229 if (mrt6debug & DEBUG_FORWARD) 1230 log(LOG_DEBUG, 1231 "getting the iif info in the kernel\n"); 1232 #endif 1233 1234 for (mifp = mif6table, mifi = 0; 1235 mifi < nummifs && mifp->m6_ifp != ifp; 1236 mifp++, mifi++) 1237 ; 1238 1239 switch (ip6_mrouter_ver) { 1240 case MRT6_OINIT: 1241 oim->im6_mif = mifi; 1242 break; 1243 case MRT6_INIT: 1244 im->im6_mif = mifi; 1245 break; 1246 } 1247 1248 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1249 log(LOG_WARNING, "ip6_mforward: ip6_mrouter " 1250 "socket queue full\n"); 1251 mrt6stat.mrt6s_upq_sockfull++; 1252 free(rte, M_MRTABLE); 1253 m_freem(mb0); 1254 free(rt, M_MRTABLE); 1255 splx(s); 1256 return ENOBUFS; 1257 } 1258 1259 mrt6stat.mrt6s_upcalls++; 1260 1261 /* insert new entry at head of hash chain */ 1262 bzero(rt, sizeof(*rt)); 1263 rt->mf6c_origin.sin6_family = AF_INET6; 1264 rt->mf6c_origin.sin6_len = sizeof(struct sockaddr_in6); 1265 rt->mf6c_origin.sin6_addr = ip6->ip6_src; 1266 rt->mf6c_mcastgrp.sin6_family = AF_INET6; 1267 rt->mf6c_mcastgrp.sin6_len = sizeof(struct sockaddr_in6); 1268 rt->mf6c_mcastgrp.sin6_addr = ip6->ip6_dst; 1269 rt->mf6c_expire = UPCALL_EXPIRE; 1270 n6expire[hash]++; 1271 rt->mf6c_parent = MF6C_INCOMPLETE_PARENT; 1272 1273 /* link into table */ 1274 rt->mf6c_next = mf6ctable[hash]; 1275 mf6ctable[hash] = rt; 1276 /* Add this entry to the end of the queue */ 1277 rt->mf6c_stall = rte; 1278 } else { 1279 /* determine if q has overflowed */ 1280 struct rtdetq **p; 1281 int npkts = 0; 1282 1283 for (p = &rt->mf6c_stall; *p != NULL; p = &(*p)->next) 1284 if (++npkts > MAX_UPQ6) { 1285 mrt6stat.mrt6s_upq_ovflw++; 1286 free(rte, M_MRTABLE); 1287 m_freem(mb0); 1288 splx(s); 1289 return 0; 1290 } 1291 1292 /* Add this entry to the end of the queue */ 1293 *p = rte; 1294 } 1295 1296 rte->next = NULL; 1297 rte->m = mb0; 1298 rte->ifp = ifp; 1299 #ifdef UPCALL_TIMING 1300 rte->t = tp; 1301 #endif /* UPCALL_TIMING */ 1302 1303 splx(s); 1304 1305 return 0; 1306 } 1307 } 1308 1309 /* 1310 * Clean up cache entries if upcalls are not serviced 1311 * Call from the Slow Timeout mechanism, every 0.25 seconds. 1312 */ 1313 static void 1314 expire_upcalls(void *unused) 1315 { 1316 struct rtdetq *rte; 1317 struct mf6c *mfc, **nptr; 1318 int i; 1319 int s; 1320 1321 s = splsoftnet(); 1322 for (i = 0; i < MF6CTBLSIZ; i++) { 1323 if (n6expire[i] == 0) 1324 continue; 1325 nptr = &mf6ctable[i]; 1326 while ((mfc = *nptr) != NULL) { 1327 rte = mfc->mf6c_stall; 1328 /* 1329 * Skip real cache entries 1330 * Make sure it wasn't marked to not expire (shouldn't happen) 1331 * If it expires now 1332 */ 1333 if (rte != NULL && 1334 mfc->mf6c_expire != 0 && 1335 --mfc->mf6c_expire == 0) { 1336 #ifdef MRT6DEBUG 1337 if (mrt6debug & DEBUG_EXPIRE) 1338 log(LOG_DEBUG, "expire_upcalls: expiring (%s %s)\n", 1339 ip6_sprintf(&mfc->mf6c_origin.sin6_addr), 1340 ip6_sprintf(&mfc->mf6c_mcastgrp.sin6_addr)); 1341 #endif 1342 /* 1343 * drop all the packets 1344 * free the mbuf with the pkt, if, timing info 1345 */ 1346 do { 1347 struct rtdetq *n = rte->next; 1348 m_freem(rte->m); 1349 free(rte, M_MRTABLE); 1350 rte = n; 1351 } while (rte != NULL); 1352 mrt6stat.mrt6s_cache_cleanups++; 1353 n6expire[i]--; 1354 1355 *nptr = mfc->mf6c_next; 1356 free(mfc, M_MRTABLE); 1357 } else { 1358 nptr = &mfc->mf6c_next; 1359 } 1360 } 1361 } 1362 splx(s); 1363 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 1364 expire_upcalls, NULL); 1365 } 1366 1367 /* 1368 * Packet forwarding routine once entry in the cache is made 1369 */ 1370 static int 1371 ip6_mdq(m, ifp, rt) 1372 struct mbuf *m; 1373 struct ifnet *ifp; 1374 struct mf6c *rt; 1375 { 1376 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 1377 mifi_t mifi, iif; 1378 struct mif6 *mifp; 1379 int plen = m->m_pkthdr.len; 1380 struct in6_addr src0, dst0; /* copies for local work */ 1381 u_int32_t iszone, idzone, oszone, odzone; 1382 int error = 0; 1383 1384 /* 1385 * Macro to send packet on mif. Since RSVP packets don't get counted on 1386 * input, they shouldn't get counted on output, so statistics keeping is 1387 * separate. 1388 */ 1389 1390 #define MC6_SEND(ip6, mifp, m) do { \ 1391 if ((mifp)->m6_flags & MIFF_REGISTER) \ 1392 register_send((ip6), (mifp), (m)); \ 1393 else \ 1394 phyint_send((ip6), (mifp), (m)); \ 1395 } while (/*CONSTCOND*/ 0) 1396 1397 /* 1398 * Don't forward if it didn't arrive from the parent mif 1399 * for its origin. 1400 */ 1401 mifi = rt->mf6c_parent; 1402 if ((mifi >= nummifs) || (mif6table[mifi].m6_ifp != ifp)) { 1403 /* came in the wrong interface */ 1404 #ifdef MRT6DEBUG 1405 if (mrt6debug & DEBUG_FORWARD) 1406 log(LOG_DEBUG, 1407 "wrong if: ifid %d mifi %d mififid %x\n", 1408 ifp->if_index, mifi, 1409 mif6table[mifi].m6_ifp ? 1410 mif6table[mifi].m6_ifp->if_index : -1); 1411 #endif 1412 mrt6stat.mrt6s_wrong_if++; 1413 rt->mf6c_wrong_if++; 1414 /* 1415 * If we are doing PIM processing, and we are forwarding 1416 * packets on this interface, send a message to the 1417 * routing daemon. 1418 */ 1419 /* have to make sure this is a valid mif */ 1420 if (mifi < nummifs && mif6table[mifi].m6_ifp) 1421 if (pim6 && (m->m_flags & M_LOOP) == 0) { 1422 /* 1423 * Check the M_LOOP flag to avoid an 1424 * unnecessary PIM assert. 1425 * XXX: M_LOOP is an ad-hoc hack... 1426 */ 1427 struct sockaddr_in6 sin6; 1428 1429 struct mbuf *mm; 1430 struct mrt6msg *im; 1431 struct omrt6msg *oim; 1432 1433 mm = m_copy(m, 0, sizeof(struct ip6_hdr)); 1434 if (mm && 1435 (M_READONLY(mm) || 1436 mm->m_len < sizeof(struct ip6_hdr))) 1437 mm = m_pullup(mm, sizeof(struct ip6_hdr)); 1438 if (mm == NULL) 1439 return ENOBUFS; 1440 1441 oim = NULL; 1442 im = NULL; 1443 switch (ip6_mrouter_ver) { 1444 case MRT6_OINIT: 1445 oim = mtod(mm, struct omrt6msg *); 1446 oim->im6_msgtype = MRT6MSG_WRONGMIF; 1447 oim->im6_mbz = 0; 1448 break; 1449 case MRT6_INIT: 1450 im = mtod(mm, struct mrt6msg *); 1451 im->im6_msgtype = MRT6MSG_WRONGMIF; 1452 im->im6_mbz = 0; 1453 break; 1454 default: 1455 m_freem(mm); 1456 return EINVAL; 1457 } 1458 1459 for (mifp = mif6table, iif = 0; 1460 iif < nummifs && mifp && 1461 mifp->m6_ifp != ifp; 1462 mifp++, iif++) 1463 ; 1464 1465 bzero(&sin6, sizeof(sin6)); 1466 sin6.sin6_len = sizeof(sin6); 1467 sin6.sin6_family = AF_INET6; 1468 switch (ip6_mrouter_ver) { 1469 case MRT6_OINIT: 1470 oim->im6_mif = iif; 1471 sin6.sin6_addr = oim->im6_src; 1472 break; 1473 case MRT6_INIT: 1474 im->im6_mif = iif; 1475 sin6.sin6_addr = im->im6_src; 1476 break; 1477 } 1478 1479 mrt6stat.mrt6s_upcalls++; 1480 1481 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1482 #ifdef MRT6DEBUG 1483 if (mrt6debug) 1484 log(LOG_WARNING, "mdq, ip6_mrouter socket queue full\n"); 1485 #endif 1486 ++mrt6stat.mrt6s_upq_sockfull; 1487 return ENOBUFS; 1488 } /* if socket Q full */ 1489 } /* if PIM */ 1490 return 0; 1491 } /* if wrong iif */ 1492 1493 /* If I sourced this packet, it counts as output, else it was input. */ 1494 if (m->m_pkthdr.rcvif == NULL) { 1495 /* XXX: is rcvif really NULL when output?? */ 1496 mif6table[mifi].m6_pkt_out++; 1497 mif6table[mifi].m6_bytes_out += plen; 1498 } else { 1499 mif6table[mifi].m6_pkt_in++; 1500 mif6table[mifi].m6_bytes_in += plen; 1501 } 1502 rt->mf6c_pkt_cnt++; 1503 rt->mf6c_byte_cnt += plen; 1504 1505 /* 1506 * For each mif, forward a copy of the packet if there are group 1507 * members downstream on the interface. 1508 */ 1509 src0 = ip6->ip6_src; 1510 dst0 = ip6->ip6_dst; 1511 if ((error = in6_setscope(&src0, ifp, &iszone)) != 0 || 1512 (error = in6_setscope(&dst0, ifp, &idzone)) != 0) { 1513 ip6stat.ip6s_badscope++; 1514 return (error); 1515 } 1516 for (mifp = mif6table, mifi = 0; mifi < nummifs; mifp++, mifi++) 1517 if (IF_ISSET(mifi, &rt->mf6c_ifset)) { 1518 if (mif6table[mifi].m6_ifp == NULL) 1519 continue; 1520 /* 1521 * check if the outgoing packet is going to break 1522 * a scope boundary. 1523 * XXX: For packets through PIM register tunnel 1524 * interface, we believe the routing daemon. 1525 */ 1526 if ((mif6table[rt->mf6c_parent].m6_flags & 1527 MIFF_REGISTER) == 0 && 1528 (mif6table[mifi].m6_flags & MIFF_REGISTER) == 0) { 1529 if (in6_setscope(&src0, mif6table[mifi].m6_ifp, 1530 &oszone) || 1531 in6_setscope(&dst0, mif6table[mifi].m6_ifp, 1532 &odzone) || 1533 iszone != oszone || idzone != odzone) { 1534 ip6stat.ip6s_badscope++; 1535 continue; 1536 } 1537 } 1538 1539 mifp->m6_pkt_out++; 1540 mifp->m6_bytes_out += plen; 1541 MC6_SEND(ip6, mifp, m); 1542 } 1543 return 0; 1544 } 1545 1546 static void 1547 phyint_send(ip6, mifp, m) 1548 struct ip6_hdr *ip6; 1549 struct mif6 *mifp; 1550 struct mbuf *m; 1551 { 1552 struct mbuf *mb_copy; 1553 struct ifnet *ifp = mifp->m6_ifp; 1554 int error = 0; 1555 int s = splsoftnet(); 1556 static struct route_in6 ro; 1557 struct in6_multi *in6m; 1558 struct sockaddr_in6 dst6; 1559 u_long linkmtu; 1560 1561 /* 1562 * Make a new reference to the packet; make sure that 1563 * the IPv6 header is actually copied, not just referenced, 1564 * so that ip6_output() only scribbles on the copy. 1565 */ 1566 mb_copy = m_copy(m, 0, M_COPYALL); 1567 if (mb_copy && 1568 (M_READONLY(mb_copy) || mb_copy->m_len < sizeof(struct ip6_hdr))) 1569 mb_copy = m_pullup(mb_copy, sizeof(struct ip6_hdr)); 1570 if (mb_copy == NULL) { 1571 splx(s); 1572 return; 1573 } 1574 /* set MCAST flag to the outgoing packet */ 1575 mb_copy->m_flags |= M_MCAST; 1576 1577 /* 1578 * If we sourced the packet, call ip6_output since we may divide 1579 * the packet into fragments when the packet is too big for the 1580 * outgoing interface. 1581 * Otherwise, we can simply send the packet to the interface 1582 * sending queue. 1583 */ 1584 if (m->m_pkthdr.rcvif == NULL) { 1585 struct ip6_moptions im6o; 1586 1587 im6o.im6o_multicast_ifp = ifp; 1588 /* XXX: ip6_output will override ip6->ip6_hlim */ 1589 im6o.im6o_multicast_hlim = ip6->ip6_hlim; 1590 im6o.im6o_multicast_loop = 1; 1591 error = ip6_output(mb_copy, NULL, &ro, IPV6_FORWARDING, 1592 &im6o, (struct socket *)0, NULL); 1593 1594 #ifdef MRT6DEBUG 1595 if (mrt6debug & DEBUG_XMIT) 1596 log(LOG_DEBUG, "phyint_send on mif %d err %d\n", 1597 mifp - mif6table, error); 1598 #endif 1599 splx(s); 1600 return; 1601 } 1602 1603 /* 1604 * If we belong to the destination multicast group 1605 * on the outgoing interface, loop back a copy. 1606 */ 1607 /* 1608 * Does not have to check source info, as it's alreay covered by 1609 * ip6_input 1610 */ 1611 memset(&dst6, 0, sizeof(dst6)); 1612 dst6.sin6_family = AF_INET6; 1613 dst6.sin6_len = sizeof(struct sockaddr_in6); 1614 dst6.sin6_addr = ip6->ip6_dst; 1615 1616 IN6_LOOKUP_MULTI(ip6->ip6_dst, ifp, in6m); 1617 if (in6m != NULL) 1618 ip6_mloopback(ifp, m, (struct sockaddr_in6 *)&ro.ro_dst); 1619 1620 /* 1621 * Put the packet into the sending queue of the outgoing interface 1622 * if it would fit in the MTU of the interface. 1623 */ 1624 linkmtu = IN6_LINKMTU(ifp); 1625 if (mb_copy->m_pkthdr.len <= linkmtu || linkmtu < IPV6_MMTU) { 1626 /* 1627 * We could call if_output directly here, but we use 1628 * nd6_output on purpose to see if IPv6 operation is allowed 1629 * on the interface. 1630 */ 1631 error = nd6_output(ifp, ifp, mb_copy, &dst6, NULL); 1632 #ifdef MRT6DEBUG 1633 if (mrt6debug & DEBUG_XMIT) 1634 log(LOG_DEBUG, "phyint_send on mif %d err %d\n", 1635 mifp - mif6table, error); 1636 #endif 1637 } else { 1638 /* 1639 * pMTU discovery is intentionally disabled by default, since 1640 * various router may notify pMTU in multicast, which can be 1641 * a DDoS to a router 1642 */ 1643 if (ip6_mcast_pmtu) 1644 icmp6_error(mb_copy, ICMP6_PACKET_TOO_BIG, 0, linkmtu); 1645 else { 1646 #ifdef MRT6DEBUG 1647 if (mrt6debug & DEBUG_XMIT) 1648 log(LOG_DEBUG, 1649 "phyint_send: packet too big on %s o %s g %s" 1650 " size %d(discarded)\n", 1651 if_name(ifp), 1652 ip6_sprintf(&ip6->ip6_src), 1653 ip6_sprintf(&ip6->ip6_dst), 1654 mb_copy->m_pkthdr.len); 1655 #endif /* MRT6DEBUG */ 1656 m_freem(mb_copy); /* simply discard the packet */ 1657 } 1658 } 1659 1660 splx(s); 1661 } 1662 1663 static int 1664 register_send(ip6, mif, m) 1665 struct ip6_hdr *ip6; 1666 struct mif6 *mif; 1667 struct mbuf *m; 1668 { 1669 struct mbuf *mm; 1670 int i, len = m->m_pkthdr.len; 1671 struct sockaddr_in6 sin6; 1672 struct mrt6msg *im6; 1673 1674 #ifdef MRT6DEBUG 1675 if (mrt6debug) 1676 log(LOG_DEBUG, "** IPv6 register_send **\n src %s dst %s\n", 1677 ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst)); 1678 #endif 1679 ++pim6stat.pim6s_snd_registers; 1680 1681 /* Make a copy of the packet to send to the user level process */ 1682 MGETHDR(mm, M_DONTWAIT, MT_HEADER); 1683 if (mm == NULL) 1684 return ENOBUFS; 1685 mm->m_data += max_linkhdr; 1686 mm->m_len = sizeof(struct ip6_hdr); 1687 1688 if ((mm->m_next = m_copy(m, 0, M_COPYALL)) == NULL) { 1689 m_freem(mm); 1690 return ENOBUFS; 1691 } 1692 i = MHLEN - M_LEADINGSPACE(mm); 1693 if (i > len) 1694 i = len; 1695 mm = m_pullup(mm, i); 1696 if (mm == NULL) 1697 return ENOBUFS; 1698 /* TODO: check it! */ 1699 mm->m_pkthdr.len = len + sizeof(struct ip6_hdr); 1700 1701 /* 1702 * Send message to routing daemon 1703 */ 1704 (void)memset(&sin6, 0, sizeof(sin6)); 1705 sin6.sin6_len = sizeof(sin6); 1706 sin6.sin6_family = AF_INET6; 1707 sin6.sin6_addr = ip6->ip6_src; 1708 1709 im6 = mtod(mm, struct mrt6msg *); 1710 im6->im6_msgtype = MRT6MSG_WHOLEPKT; 1711 im6->im6_mbz = 0; 1712 1713 im6->im6_mif = mif - mif6table; 1714 1715 /* iif info is not given for reg. encap.n */ 1716 mrt6stat.mrt6s_upcalls++; 1717 1718 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1719 #ifdef MRT6DEBUG 1720 if (mrt6debug) 1721 log(LOG_WARNING, 1722 "register_send: ip6_mrouter socket queue full\n"); 1723 #endif 1724 ++mrt6stat.mrt6s_upq_sockfull; 1725 return ENOBUFS; 1726 } 1727 return 0; 1728 } 1729 1730 /* 1731 * PIM sparse mode hook 1732 * Receives the pim control messages, and passes them up to the listening 1733 * socket, using rip6_input. 1734 * The only message processed is the REGISTER pim message; the pim header 1735 * is stripped off, and the inner packet is passed to register_mforward. 1736 */ 1737 int 1738 pim6_input(mp, offp, proto) 1739 struct mbuf **mp; 1740 int *offp, proto; 1741 { 1742 struct pim *pim; /* pointer to a pim struct */ 1743 struct ip6_hdr *ip6; 1744 int pimlen; 1745 struct mbuf *m = *mp; 1746 int minlen; 1747 int off = *offp; 1748 1749 ++pim6stat.pim6s_rcv_total; 1750 1751 ip6 = mtod(m, struct ip6_hdr *); 1752 pimlen = m->m_pkthdr.len - *offp; 1753 1754 /* 1755 * Validate lengths 1756 */ 1757 if (pimlen < PIM_MINLEN) { 1758 ++pim6stat.pim6s_rcv_tooshort; 1759 #ifdef MRT6DEBUG 1760 if (mrt6debug & DEBUG_PIM) 1761 log(LOG_DEBUG,"pim6_input: PIM packet too short\n"); 1762 #endif 1763 m_freem(m); 1764 return (IPPROTO_DONE); 1765 } 1766 1767 /* 1768 * if the packet is at least as big as a REGISTER, go ahead 1769 * and grab the PIM REGISTER header size, to avoid another 1770 * possible m_pullup() later. 1771 * 1772 * PIM_MINLEN == pimhdr + u_int32 == 8 1773 * PIM6_REG_MINLEN == pimhdr + reghdr + eip6hdr == 4 + 4 + 40 1774 */ 1775 minlen = (pimlen >= PIM6_REG_MINLEN) ? PIM6_REG_MINLEN : PIM_MINLEN; 1776 1777 /* 1778 * Make sure that the IP6 and PIM headers in contiguous memory, and 1779 * possibly the PIM REGISTER header 1780 */ 1781 IP6_EXTHDR_GET(pim, struct pim *, m, off, minlen); 1782 if (pim == NULL) { 1783 pim6stat.pim6s_rcv_tooshort++; 1784 return IPPROTO_DONE; 1785 } 1786 1787 /* PIM version check */ 1788 if (pim->pim_ver != PIM_VERSION) { 1789 ++pim6stat.pim6s_rcv_badversion; 1790 #ifdef MRT6DEBUG 1791 log(LOG_ERR, 1792 "pim6_input: incorrect version %d, expecting %d\n", 1793 pim->pim_ver, PIM_VERSION); 1794 #endif 1795 m_freem(m); 1796 return (IPPROTO_DONE); 1797 } 1798 1799 #define PIM6_CHECKSUM 1800 #ifdef PIM6_CHECKSUM 1801 { 1802 int cksumlen; 1803 1804 /* 1805 * Validate checksum. 1806 * If PIM REGISTER, exclude the data packet 1807 */ 1808 if (pim->pim_type == PIM_REGISTER) 1809 cksumlen = PIM_MINLEN; 1810 else 1811 cksumlen = pimlen; 1812 1813 if (in6_cksum(m, IPPROTO_PIM, off, cksumlen)) { 1814 ++pim6stat.pim6s_rcv_badsum; 1815 #ifdef MRT6DEBUG 1816 if (mrt6debug & DEBUG_PIM) 1817 log(LOG_DEBUG, 1818 "pim6_input: invalid checksum\n"); 1819 #endif 1820 m_freem(m); 1821 return (IPPROTO_DONE); 1822 } 1823 } 1824 #endif /* PIM_CHECKSUM */ 1825 1826 if (pim->pim_type == PIM_REGISTER) { 1827 /* 1828 * since this is a REGISTER, we'll make a copy of the register 1829 * headers ip6+pim+u_int32_t+encap_ip6, to be passed up to the 1830 * routing daemon. 1831 */ 1832 static const struct sockaddr_in6 dst = { 1833 .sin6_len = sizeof(dst), 1834 .sin6_family = AF_INET6, 1835 }; 1836 1837 struct mbuf *mcp; 1838 struct ip6_hdr *eip6; 1839 u_int32_t *reghdr; 1840 1841 ++pim6stat.pim6s_rcv_registers; 1842 1843 if ((reg_mif_num >= nummifs) || (reg_mif_num == (mifi_t) -1)) { 1844 #ifdef MRT6DEBUG 1845 if (mrt6debug & DEBUG_PIM) 1846 log(LOG_DEBUG, 1847 "pim6_input: register mif not set: %d\n", 1848 reg_mif_num); 1849 #endif 1850 m_freem(m); 1851 return (IPPROTO_DONE); 1852 } 1853 1854 reghdr = (u_int32_t *)(pim + 1); 1855 1856 if ((ntohl(*reghdr) & PIM_NULL_REGISTER)) 1857 goto pim6_input_to_daemon; 1858 1859 /* 1860 * Validate length 1861 */ 1862 if (pimlen < PIM6_REG_MINLEN) { 1863 ++pim6stat.pim6s_rcv_tooshort; 1864 ++pim6stat.pim6s_rcv_badregisters; 1865 #ifdef MRT6DEBUG 1866 log(LOG_ERR, 1867 "pim6_input: register packet size too " 1868 "small %d from %s\n", 1869 pimlen, ip6_sprintf(&ip6->ip6_src)); 1870 #endif 1871 m_freem(m); 1872 return (IPPROTO_DONE); 1873 } 1874 1875 eip6 = (struct ip6_hdr *) (reghdr + 1); 1876 #ifdef MRT6DEBUG 1877 if (mrt6debug & DEBUG_PIM) 1878 log(LOG_DEBUG, 1879 "pim6_input[register], eip6: %s -> %s, " 1880 "eip6 plen %d\n", 1881 ip6_sprintf(&eip6->ip6_src), 1882 ip6_sprintf(&eip6->ip6_dst), 1883 ntohs(eip6->ip6_plen)); 1884 #endif 1885 1886 /* verify the version number of the inner packet */ 1887 if ((eip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) { 1888 ++pim6stat.pim6s_rcv_badregisters; 1889 #ifdef MRT6DEBUG 1890 log(LOG_DEBUG, "pim6_input: invalid IP version (%d) " 1891 "of the inner packet\n", 1892 (eip6->ip6_vfc & IPV6_VERSION)); 1893 #endif 1894 m_freem(m); 1895 return (IPPROTO_NONE); 1896 } 1897 1898 /* verify the inner packet is destined to a mcast group */ 1899 if (!IN6_IS_ADDR_MULTICAST(&eip6->ip6_dst)) { 1900 ++pim6stat.pim6s_rcv_badregisters; 1901 #ifdef MRT6DEBUG 1902 if (mrt6debug & DEBUG_PIM) 1903 log(LOG_DEBUG, 1904 "pim6_input: inner packet of register " 1905 "is not multicast %s\n", 1906 ip6_sprintf(&eip6->ip6_dst)); 1907 #endif 1908 m_freem(m); 1909 return (IPPROTO_DONE); 1910 } 1911 1912 /* 1913 * make a copy of the whole header to pass to the daemon later. 1914 */ 1915 mcp = m_copy(m, 0, off + PIM6_REG_MINLEN); 1916 if (mcp == NULL) { 1917 #ifdef MRT6DEBUG 1918 log(LOG_ERR, 1919 "pim6_input: pim register: " 1920 "could not copy register head\n"); 1921 #endif 1922 m_freem(m); 1923 return (IPPROTO_DONE); 1924 } 1925 1926 /* 1927 * forward the inner ip6 packet; point m_data at the inner ip6. 1928 */ 1929 m_adj(m, off + PIM_MINLEN); 1930 #ifdef MRT6DEBUG 1931 if (mrt6debug & DEBUG_PIM) { 1932 log(LOG_DEBUG, 1933 "pim6_input: forwarding decapsulated register: " 1934 "src %s, dst %s, mif %d\n", 1935 ip6_sprintf(&eip6->ip6_src), 1936 ip6_sprintf(&eip6->ip6_dst), 1937 reg_mif_num); 1938 } 1939 #endif 1940 1941 looutput(mif6table[reg_mif_num].m6_ifp, m, 1942 (struct sockaddr *)__UNCONST(&dst), 1943 (struct rtentry *) NULL); 1944 1945 /* prepare the register head to send to the mrouting daemon */ 1946 m = mcp; 1947 } 1948 1949 /* 1950 * Pass the PIM message up to the daemon; if it is a register message 1951 * pass the 'head' only up to the daemon. This includes the 1952 * encapsulator ip6 header, pim header, register header and the 1953 * encapsulated ip6 header. 1954 */ 1955 pim6_input_to_daemon: 1956 rip6_input(&m, offp, proto); 1957 return (IPPROTO_DONE); 1958 } 1959 1960 SYSCTL_SETUP(sysctl_net_inet6_pim6_setup, "sysctl net.inet6.pim6 subtree setup") 1961 { 1962 sysctl_createv(clog, 0, NULL, NULL, 1963 CTLFLAG_PERMANENT, 1964 CTLTYPE_NODE, "net", NULL, 1965 NULL, 0, NULL, 0, 1966 CTL_NET, CTL_EOL); 1967 sysctl_createv(clog, 0, NULL, NULL, 1968 CTLFLAG_PERMANENT, 1969 CTLTYPE_NODE, "inet6", NULL, 1970 NULL, 0, NULL, 0, 1971 CTL_NET, PF_INET6, CTL_EOL); 1972 sysctl_createv(clog, 0, NULL, NULL, 1973 CTLFLAG_PERMANENT, 1974 CTLTYPE_NODE, "pim6", 1975 SYSCTL_DESCR("PIMv6 settings"), 1976 NULL, 0, NULL, 0, 1977 CTL_NET, PF_INET6, IPPROTO_PIM, CTL_EOL); 1978 1979 sysctl_createv(clog, 0, NULL, NULL, 1980 CTLFLAG_PERMANENT, 1981 CTLTYPE_STRUCT, "stats", 1982 SYSCTL_DESCR("PIMv6 statistics"), 1983 NULL, 0, &pim6stat, sizeof(pim6stat), 1984 CTL_NET, PF_INET6, IPPROTO_PIM, PIM6CTL_STATS, 1985 CTL_EOL); 1986 }
Cache object: bb409c06ed0ded2531f6e0e1636bce6a
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