1 /* $NetBSD: ip6_mroute.c,v 1.116 2017/01/24 07:09:25 ozaki-r 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 1.116 2017/01/24 07:09:25 ozaki-r Exp $"); 121 122 #ifdef _KERNEL_OPT 123 #include "opt_inet.h" 124 #include "opt_mrouting.h" 125 #endif 126 127 #include <sys/param.h> 128 #include <sys/systm.h> 129 #include <sys/callout.h> 130 #include <sys/mbuf.h> 131 #include <sys/socket.h> 132 #include <sys/socketvar.h> 133 #include <sys/sockio.h> 134 #include <sys/errno.h> 135 #include <sys/time.h> 136 #include <sys/kernel.h> 137 #include <sys/ioctl.h> 138 #include <sys/sysctl.h> 139 #include <sys/syslog.h> 140 141 #include <net/if.h> 142 #include <net/route.h> 143 #include <net/raw_cb.h> 144 #include <net/net_stats.h> 145 146 #include <netinet/in.h> 147 #include <netinet/in_var.h> 148 #include <netinet/icmp6.h> 149 150 #include <netinet/ip6.h> 151 #include <netinet6/ip6_var.h> 152 #include <netinet6/ip6_private.h> 153 #include <netinet6/ip6_mroute.h> 154 #include <netinet6/scope6_var.h> 155 #include <netinet6/pim6.h> 156 #include <netinet6/pim6_var.h> 157 #include <netinet6/nd6.h> 158 159 #include <net/net_osdep.h> 160 161 static int ip6_mdq(struct mbuf *, struct ifnet *, struct mf6c *); 162 static void phyint_send(struct ip6_hdr *, struct mif6 *, struct mbuf *); 163 164 static int set_pim6(int *); 165 static int socket_send(struct socket *, struct mbuf *, 166 struct sockaddr_in6 *); 167 static int register_send(struct ip6_hdr *, struct mif6 *, struct mbuf *); 168 169 /* 170 * Globals. All but ip6_mrouter, ip6_mrtproto and mrt6stat could be static, 171 * except for netstat or debugging purposes. 172 */ 173 struct socket *ip6_mrouter = NULL; 174 int ip6_mrouter_ver = 0; 175 int ip6_mrtproto = IPPROTO_PIM; /* for netstat only */ 176 struct mrt6stat mrt6stat; 177 178 #define NO_RTE_FOUND 0x1 179 #define RTE_FOUND 0x2 180 181 struct mf6c *mf6ctable[MF6CTBLSIZ]; 182 u_char n6expire[MF6CTBLSIZ]; 183 struct mif6 mif6table[MAXMIFS]; 184 #ifdef MRT6DEBUG 185 u_int mrt6debug = 0; /* debug level */ 186 #define DEBUG_MFC 0x02 187 #define DEBUG_FORWARD 0x04 188 #define DEBUG_EXPIRE 0x08 189 #define DEBUG_XMIT 0x10 190 #define DEBUG_REG 0x20 191 #define DEBUG_PIM 0x40 192 #define __mrt6debugused /* empty */ 193 #else 194 #define __mrt6debugused __unused 195 #endif 196 197 static void expire_upcalls(void *); 198 #define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */ 199 #define UPCALL_EXPIRE 6 /* number of timeouts */ 200 201 #ifdef INET 202 #ifdef MROUTING 203 extern struct socket *ip_mrouter; 204 #endif 205 #endif 206 207 /* 208 * 'Interfaces' associated with decapsulator (so we can tell 209 * packets that went through it from ones that get reflected 210 * by a broken gateway). These interfaces are never linked into 211 * the system ifnet list & no routes point to them. I.e., packets 212 * can't be sent this way. They only exist as a placeholder for 213 * multicast source verification. 214 */ 215 struct ifnet multicast_register_if6; 216 217 #define ENCAP_HOPS 64 218 219 /* 220 * Private variables. 221 */ 222 static mifi_t nummifs = 0; 223 static mifi_t reg_mif_num = (mifi_t)-1; 224 225 static percpu_t *pim6stat_percpu; 226 227 #define PIM6_STATINC(x) _NET_STATINC(pim6stat_percpu, x) 228 229 static int pim6; 230 231 /* 232 * Hash function for a source, group entry 233 */ 234 #define MF6CHASH(a, g) MF6CHASHMOD((a).s6_addr32[0] ^ (a).s6_addr32[1] ^ \ 235 (a).s6_addr32[2] ^ (a).s6_addr32[3] ^ \ 236 (g).s6_addr32[0] ^ (g).s6_addr32[1] ^ \ 237 (g).s6_addr32[2] ^ (g).s6_addr32[3]) 238 239 /* 240 * Find a route for a given origin IPv6 address and Multicast group address. 241 * Quality of service parameter to be added in the future!!! 242 */ 243 244 #define MF6CFIND(o, g, rt) do { \ 245 struct mf6c *_rt = mf6ctable[MF6CHASH(o,g)]; \ 246 rt = NULL; \ 247 mrt6stat.mrt6s_mfc_lookups++; \ 248 while (_rt) { \ 249 if (IN6_ARE_ADDR_EQUAL(&_rt->mf6c_origin.sin6_addr, &(o)) && \ 250 IN6_ARE_ADDR_EQUAL(&_rt->mf6c_mcastgrp.sin6_addr, &(g)) && \ 251 (_rt->mf6c_stall == NULL)) { \ 252 rt = _rt; \ 253 break; \ 254 } \ 255 _rt = _rt->mf6c_next; \ 256 } \ 257 if (rt == NULL) { \ 258 mrt6stat.mrt6s_mfc_misses++; \ 259 } \ 260 } while (/*CONSTCOND*/ 0) 261 262 /* 263 * Macros to compute elapsed time efficiently 264 * Borrowed from Van Jacobson's scheduling code 265 */ 266 #define TV_DELTA(a, b, delta) do { \ 267 int xxs; \ 268 \ 269 delta = (a).tv_usec - (b).tv_usec; \ 270 if ((xxs = (a).tv_sec - (b).tv_sec)) { \ 271 switch (xxs) { \ 272 case 2: \ 273 delta += 1000000; \ 274 /* FALLTHROUGH */ \ 275 case 1: \ 276 delta += 1000000; \ 277 break; \ 278 default: \ 279 delta += (1000000 * xxs); \ 280 } \ 281 } \ 282 } while (/*CONSTCOND*/ 0) 283 284 #define TV_LT(a, b) (((a).tv_usec < (b).tv_usec && \ 285 (a).tv_sec <= (b).tv_sec) || (a).tv_sec < (b).tv_sec) 286 287 #ifdef UPCALL_TIMING 288 #define UPCALL_MAX 50 289 u_long upcall_data[UPCALL_MAX + 1]; 290 static void collate(); 291 #endif /* UPCALL_TIMING */ 292 293 static int get_sg_cnt(struct sioc_sg_req6 *); 294 static int get_mif6_cnt(struct sioc_mif_req6 *); 295 static int ip6_mrouter_init(struct socket *, int, int); 296 static int add_m6if(struct mif6ctl *); 297 static int del_m6if(mifi_t *); 298 static int add_m6fc(struct mf6cctl *); 299 static int del_m6fc(struct mf6cctl *); 300 static void sysctl_net_inet6_pim6_setup(struct sysctllog **); 301 302 static callout_t expire_upcalls_ch; 303 304 void 305 pim6_init(void) 306 { 307 308 sysctl_net_inet6_pim6_setup(NULL); 309 pim6stat_percpu = percpu_alloc(sizeof(uint64_t) * PIM6_NSTATS); 310 } 311 312 /* 313 * Handle MRT setsockopt commands to modify the multicast routing tables. 314 */ 315 int 316 ip6_mrouter_set(struct socket *so, struct sockopt *sopt) 317 { 318 int error, optval; 319 struct mif6ctl mifc; 320 struct mf6cctl mfcc; 321 mifi_t mifi; 322 323 if (sopt->sopt_name != MRT6_INIT && so != ip6_mrouter) 324 return (EACCES); 325 326 error = 0; 327 328 switch (sopt->sopt_name) { 329 #ifdef MRT6_OINIT 330 case MRT6_OINIT: 331 #endif 332 case MRT6_INIT: 333 error = sockopt_getint(sopt, &optval); 334 if (error) 335 break; 336 return (ip6_mrouter_init(so, optval, sopt->sopt_name)); 337 case MRT6_DONE: 338 return (ip6_mrouter_done()); 339 case MRT6_ADD_MIF: 340 error = sockopt_get(sopt, &mifc, sizeof(mifc)); 341 if (error) 342 break; 343 return (add_m6if(&mifc)); 344 case MRT6_DEL_MIF: 345 error = sockopt_get(sopt, &mifi, sizeof(mifi)); 346 if (error) 347 break; 348 return (del_m6if(&mifi)); 349 case MRT6_ADD_MFC: 350 error = sockopt_get(sopt, &mfcc, sizeof(mfcc)); 351 if (error) 352 break; 353 return (add_m6fc(&mfcc)); 354 case MRT6_DEL_MFC: 355 error = sockopt_get(sopt, &mfcc, sizeof(mfcc)); 356 if (error) 357 break; 358 return (del_m6fc(&mfcc)); 359 case MRT6_PIM: 360 error = sockopt_getint(sopt, &optval); 361 if (error) 362 break; 363 return (set_pim6(&optval)); 364 default: 365 error = EOPNOTSUPP; 366 } 367 368 return (error); 369 } 370 371 /* 372 * Handle MRT getsockopt commands 373 */ 374 int 375 ip6_mrouter_get(struct socket *so, struct sockopt *sopt) 376 { 377 int error; 378 379 if (so != ip6_mrouter) return EACCES; 380 381 error = 0; 382 383 switch (sopt->sopt_name) { 384 case MRT6_PIM: 385 error = sockopt_set(sopt, &pim6, sizeof(pim6)); 386 break; 387 default: 388 error = EOPNOTSUPP; 389 break; 390 } 391 392 return (error); 393 } 394 395 /* 396 * Handle ioctl commands to obtain information from the cache 397 */ 398 int 399 mrt6_ioctl(u_long cmd, void *data) 400 { 401 402 switch (cmd) { 403 case SIOCGETSGCNT_IN6: 404 return (get_sg_cnt((struct sioc_sg_req6 *)data)); 405 case SIOCGETMIFCNT_IN6: 406 return (get_mif6_cnt((struct sioc_mif_req6 *)data)); 407 default: 408 return (EINVAL); 409 } 410 } 411 412 /* 413 * returns the packet, byte, rpf-failure count for the source group provided 414 */ 415 static int 416 get_sg_cnt(struct sioc_sg_req6 *req) 417 { 418 struct mf6c *rt; 419 int s; 420 421 s = splsoftnet(); 422 MF6CFIND(req->src.sin6_addr, req->grp.sin6_addr, rt); 423 splx(s); 424 if (rt != NULL) { 425 req->pktcnt = rt->mf6c_pkt_cnt; 426 req->bytecnt = rt->mf6c_byte_cnt; 427 req->wrong_if = rt->mf6c_wrong_if; 428 } else 429 return (ESRCH); 430 #if 0 431 req->pktcnt = req->bytecnt = req->wrong_if = 0xffffffff; 432 #endif 433 434 return 0; 435 } 436 437 /* 438 * returns the input and output packet and byte counts on the mif provided 439 */ 440 static int 441 get_mif6_cnt(struct sioc_mif_req6 *req) 442 { 443 mifi_t mifi = req->mifi; 444 445 if (mifi >= nummifs) 446 return EINVAL; 447 448 req->icount = mif6table[mifi].m6_pkt_in; 449 req->ocount = mif6table[mifi].m6_pkt_out; 450 req->ibytes = mif6table[mifi].m6_bytes_in; 451 req->obytes = mif6table[mifi].m6_bytes_out; 452 453 return 0; 454 } 455 456 static int 457 set_pim6(int *i) 458 { 459 if ((*i != 1) && (*i != 0)) 460 return EINVAL; 461 462 pim6 = *i; 463 464 return 0; 465 } 466 467 /* 468 * Enable multicast routing 469 */ 470 static int 471 ip6_mrouter_init(struct socket *so, int v, int cmd) 472 { 473 #ifdef MRT6DEBUG 474 if (mrt6debug) 475 log(LOG_DEBUG, 476 "ip6_mrouter_init: so_type = %d, pr_protocol = %d\n", 477 so->so_type, so->so_proto->pr_protocol); 478 #endif 479 480 if (so->so_type != SOCK_RAW || 481 so->so_proto->pr_protocol != IPPROTO_ICMPV6) 482 return (EOPNOTSUPP); 483 484 if (v != 1) 485 return (ENOPROTOOPT); 486 487 if (ip6_mrouter != NULL) 488 return (EADDRINUSE); 489 490 ip6_mrouter = so; 491 ip6_mrouter_ver = cmd; 492 493 memset((void *)mf6ctable, 0, sizeof(mf6ctable)); 494 memset((void *)n6expire, 0, sizeof(n6expire)); 495 496 pim6 = 0;/* used for stubbing out/in pim stuff */ 497 498 callout_init(&expire_upcalls_ch, CALLOUT_MPSAFE); 499 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 500 expire_upcalls, NULL); 501 502 #ifdef MRT6DEBUG 503 if (mrt6debug) 504 log(LOG_DEBUG, "ip6_mrouter_init\n"); 505 #endif 506 507 return 0; 508 } 509 510 /* 511 * Disable multicast routing 512 */ 513 int 514 ip6_mrouter_done(void) 515 { 516 mifi_t mifi; 517 int i; 518 struct ifnet *ifp; 519 struct sockaddr_in6 sin6; 520 struct mf6c *rt; 521 struct rtdetq *rte; 522 int s; 523 524 s = splsoftnet(); 525 526 /* 527 * For each phyint in use, disable promiscuous reception of all IPv6 528 * multicasts. 529 */ 530 #ifdef INET 531 #ifdef MROUTING 532 /* 533 * If there is still IPv4 multicast routing daemon, 534 * we remain interfaces to receive all muliticasted packets. 535 * XXX: there may be an interface in which the IPv4 multicast 536 * daemon is not interested... 537 */ 538 if (!ip_mrouter) 539 #endif 540 #endif 541 { 542 for (mifi = 0; mifi < nummifs; mifi++) { 543 if (mif6table[mifi].m6_ifp && 544 !(mif6table[mifi].m6_flags & MIFF_REGISTER)) { 545 sin6.sin6_family = AF_INET6; 546 sin6.sin6_addr = in6addr_any; 547 ifp = mif6table[mifi].m6_ifp; 548 if_mcast_op(ifp, SIOCDELMULTI, 549 sin6tocsa(&sin6)); 550 } 551 } 552 } 553 #ifdef notyet 554 memset((void *)qtable, 0, sizeof(qtable)); 555 memset((void *)tbftable, 0, sizeof(tbftable)); 556 #endif 557 memset((void *)mif6table, 0, sizeof(mif6table)); 558 nummifs = 0; 559 560 pim6 = 0; /* used to stub out/in pim specific code */ 561 562 callout_stop(&expire_upcalls_ch); 563 564 /* 565 * Free all multicast forwarding cache entries. 566 */ 567 for (i = 0; i < MF6CTBLSIZ; i++) { 568 rt = mf6ctable[i]; 569 while (rt) { 570 struct mf6c *frt; 571 572 for (rte = rt->mf6c_stall; rte != NULL; ) { 573 struct rtdetq *n = rte->next; 574 575 m_freem(rte->m); 576 free(rte, M_MRTABLE); 577 rte = n; 578 } 579 frt = rt; 580 rt = rt->mf6c_next; 581 free(frt, M_MRTABLE); 582 } 583 } 584 585 memset((void *)mf6ctable, 0, sizeof(mf6ctable)); 586 587 /* 588 * Reset register interface 589 */ 590 if (reg_mif_num != (mifi_t)-1) { 591 if_detach(&multicast_register_if6); 592 reg_mif_num = (mifi_t)-1; 593 } 594 595 ip6_mrouter = NULL; 596 ip6_mrouter_ver = 0; 597 598 splx(s); 599 600 #ifdef MRT6DEBUG 601 if (mrt6debug) 602 log(LOG_DEBUG, "ip6_mrouter_done\n"); 603 #endif 604 605 return 0; 606 } 607 608 void 609 ip6_mrouter_detach(struct ifnet *ifp) 610 { 611 struct rtdetq *rte; 612 struct mf6c *mfc; 613 mifi_t mifi; 614 int i; 615 616 if (ip6_mrouter == NULL) 617 return; 618 619 /* 620 * Delete a mif which points to ifp. 621 */ 622 for (mifi = 0; mifi < nummifs; mifi++) 623 if (mif6table[mifi].m6_ifp == ifp) 624 del_m6if(&mifi); 625 626 /* 627 * Clear rte->ifp of cache entries received on ifp. 628 */ 629 for (i = 0; i < MF6CTBLSIZ; i++) { 630 if (n6expire[i] == 0) 631 continue; 632 633 for (mfc = mf6ctable[i]; mfc != NULL; mfc = mfc->mf6c_next) { 634 for (rte = mfc->mf6c_stall; rte != NULL; rte = rte->next) { 635 if (rte->ifp == ifp) 636 rte->ifp = NULL; 637 } 638 } 639 } 640 } 641 642 643 /* 644 * Add a mif to the mif table 645 */ 646 static int 647 add_m6if(struct mif6ctl *mifcp) 648 { 649 struct mif6 *mifp; 650 struct ifnet *ifp; 651 struct sockaddr_in6 sin6; 652 int error, s; 653 #ifdef notyet 654 struct tbf *m_tbf = tbftable + mifcp->mif6c_mifi; 655 #endif 656 657 if (mifcp->mif6c_mifi >= MAXMIFS) 658 return EINVAL; 659 mifp = mif6table + mifcp->mif6c_mifi; 660 if (mifp->m6_ifp) 661 return EADDRINUSE; /* XXX: is it appropriate? */ 662 if (!mifcp->mif6c_pifi || (ifp = if_byindex(mifcp->mif6c_pifi)) == NULL) 663 return ENXIO; 664 665 if (mifcp->mif6c_flags & MIFF_REGISTER) { 666 ifp = &multicast_register_if6; 667 668 if (reg_mif_num == (mifi_t)-1) { 669 strlcpy(ifp->if_xname, "register_mif", 670 sizeof(ifp->if_xname)); 671 ifp->if_flags |= IFF_LOOPBACK; 672 ifp->if_index = mifcp->mif6c_mifi; 673 reg_mif_num = mifcp->mif6c_mifi; 674 if_attach(ifp); 675 } 676 677 } /* if REGISTER */ 678 else { 679 /* Make sure the interface supports multicast */ 680 if ((ifp->if_flags & IFF_MULTICAST) == 0) 681 return EOPNOTSUPP; 682 683 s = splsoftnet(); 684 /* 685 * Enable promiscuous reception of all IPv6 multicasts 686 * from the interface. 687 */ 688 sin6.sin6_family = AF_INET6; 689 sin6.sin6_addr = in6addr_any; 690 error = if_mcast_op(ifp, SIOCADDMULTI, sin6tosa(&sin6)); 691 splx(s); 692 if (error) 693 return error; 694 } 695 696 s = splsoftnet(); 697 mifp->m6_flags = mifcp->mif6c_flags; 698 mifp->m6_ifp = ifp; 699 #ifdef notyet 700 /* scaling up here allows division by 1024 in critical code */ 701 mifp->m6_rate_limit = mifcp->mif6c_rate_limit * 1024 / 1000; 702 #endif 703 /* initialize per mif pkt counters */ 704 mifp->m6_pkt_in = 0; 705 mifp->m6_pkt_out = 0; 706 mifp->m6_bytes_in = 0; 707 mifp->m6_bytes_out = 0; 708 splx(s); 709 710 /* Adjust nummifs up if the mifi is higher than nummifs */ 711 if (nummifs <= mifcp->mif6c_mifi) 712 nummifs = mifcp->mif6c_mifi + 1; 713 714 #ifdef MRT6DEBUG 715 if (mrt6debug) 716 log(LOG_DEBUG, 717 "add_mif #%d, phyint %s\n", 718 mifcp->mif6c_mifi, ifp->if_xname); 719 #endif 720 721 return 0; 722 } 723 724 /* 725 * Delete a mif from the mif table 726 */ 727 static int 728 del_m6if(mifi_t *mifip) 729 { 730 struct mif6 *mifp = mif6table + *mifip; 731 mifi_t mifi; 732 struct ifnet *ifp; 733 struct sockaddr_in6 sin6; 734 int s; 735 736 if (*mifip >= nummifs) 737 return EINVAL; 738 if (mifp->m6_ifp == NULL) 739 return EINVAL; 740 741 s = splsoftnet(); 742 743 if (!(mifp->m6_flags & MIFF_REGISTER)) { 744 /* 745 * XXX: what if there is yet IPv4 multicast daemon 746 * using the interface? 747 */ 748 ifp = mifp->m6_ifp; 749 750 sin6.sin6_family = AF_INET6; 751 sin6.sin6_addr = in6addr_any; 752 if_mcast_op(ifp, SIOCDELMULTI, sin6tosa(&sin6)); 753 } else { 754 if (reg_mif_num != (mifi_t)-1) { 755 if_detach(&multicast_register_if6); 756 reg_mif_num = (mifi_t)-1; 757 } 758 } 759 760 #ifdef notyet 761 memset((void *)qtable[*mifip], 0, sizeof(qtable[*mifip])); 762 memset((void *)mifp->m6_tbf, 0, sizeof(*(mifp->m6_tbf))); 763 #endif 764 memset((void *)mifp, 0, sizeof (*mifp)); 765 766 /* Adjust nummifs down */ 767 for (mifi = nummifs; mifi > 0; mifi--) 768 if (mif6table[mifi - 1].m6_ifp) 769 break; 770 nummifs = mifi; 771 772 splx(s); 773 774 #ifdef MRT6DEBUG 775 if (mrt6debug) 776 log(LOG_DEBUG, "del_m6if %d, nummifs %d\n", *mifip, nummifs); 777 #endif 778 779 return 0; 780 } 781 782 /* 783 * Add an mfc entry 784 */ 785 static int 786 add_m6fc(struct mf6cctl *mfccp) 787 { 788 struct mf6c *rt; 789 u_long hash; 790 struct rtdetq *rte; 791 u_short nstl; 792 int s; 793 char ip6bufo[INET6_ADDRSTRLEN], ip6bufm[INET6_ADDRSTRLEN]; 794 795 MF6CFIND(mfccp->mf6cc_origin.sin6_addr, 796 mfccp->mf6cc_mcastgrp.sin6_addr, rt); 797 798 /* If an entry already exists, just update the fields */ 799 if (rt) { 800 #ifdef MRT6DEBUG 801 if (mrt6debug & DEBUG_MFC) 802 log(LOG_DEBUG,"add_m6fc update o %s g %s p %x\n", 803 IN6_PRINT(ip6bufo, 804 &mfccp->mf6cc_origin.sin6_addr), 805 IN6_PRINT(ip6bufm, 806 &mfccp->mf6cc_mcastgrp.sin6_addr), 807 mfccp->mf6cc_parent); 808 #endif 809 810 s = splsoftnet(); 811 rt->mf6c_parent = mfccp->mf6cc_parent; 812 rt->mf6c_ifset = mfccp->mf6cc_ifset; 813 splx(s); 814 return 0; 815 } 816 817 /* 818 * Find the entry for which the upcall was made and update 819 */ 820 s = splsoftnet(); 821 hash = MF6CHASH(mfccp->mf6cc_origin.sin6_addr, 822 mfccp->mf6cc_mcastgrp.sin6_addr); 823 for (rt = mf6ctable[hash], nstl = 0; rt; rt = rt->mf6c_next) { 824 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 825 &mfccp->mf6cc_origin.sin6_addr) && 826 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 827 &mfccp->mf6cc_mcastgrp.sin6_addr) && 828 (rt->mf6c_stall != NULL)) { 829 830 if (nstl++) 831 log(LOG_ERR, 832 "add_m6fc: %s o %s g %s p %x dbx %p\n", 833 "multiple kernel entries", 834 IN6_PRINT(ip6bufo, 835 &mfccp->mf6cc_origin.sin6_addr), 836 IN6_PRINT(ip6bufm, 837 &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 IN6_PRINT(ip6bufo, 845 &mfccp->mf6cc_origin.sin6_addr), 846 IN6_PRINT(ip6bufm, 847 &mfccp->mf6cc_mcastgrp.sin6_addr), 848 mfccp->mf6cc_parent, rt->mf6c_stall); 849 #endif 850 851 rt->mf6c_origin = mfccp->mf6cc_origin; 852 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 853 rt->mf6c_parent = mfccp->mf6cc_parent; 854 rt->mf6c_ifset = mfccp->mf6cc_ifset; 855 /* initialize pkt counters per src-grp */ 856 rt->mf6c_pkt_cnt = 0; 857 rt->mf6c_byte_cnt = 0; 858 rt->mf6c_wrong_if = 0; 859 860 rt->mf6c_expire = 0; /* Don't clean this guy up */ 861 n6expire[hash]--; 862 863 /* free packets Qed at the end of this entry */ 864 for (rte = rt->mf6c_stall; rte != NULL; ) { 865 struct rtdetq *n = rte->next; 866 if (rte->ifp) { 867 ip6_mdq(rte->m, rte->ifp, rt); 868 } 869 m_freem(rte->m); 870 #ifdef UPCALL_TIMING 871 collate(&(rte->t)); 872 #endif /* UPCALL_TIMING */ 873 free(rte, M_MRTABLE); 874 rte = n; 875 } 876 rt->mf6c_stall = NULL; 877 } 878 } 879 880 /* 881 * It is possible that an entry is being inserted without an upcall 882 */ 883 if (nstl == 0) { 884 #ifdef MRT6DEBUG 885 if (mrt6debug & DEBUG_MFC) 886 log(LOG_DEBUG, 887 "add_mfc no upcall h %ld o %s g %s p %x\n", 888 hash, 889 IN6_PRINT(ip6bufo, 890 &mfccp->mf6cc_origin.sin6_addr), 891 IN6_PRINT(ip6bufm, 892 &mfccp->mf6cc_mcastgrp.sin6_addr), 893 mfccp->mf6cc_parent); 894 #endif 895 896 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 897 898 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 899 &mfccp->mf6cc_origin.sin6_addr)&& 900 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 901 &mfccp->mf6cc_mcastgrp.sin6_addr)) { 902 903 rt->mf6c_origin = mfccp->mf6cc_origin; 904 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 905 rt->mf6c_parent = mfccp->mf6cc_parent; 906 rt->mf6c_ifset = mfccp->mf6cc_ifset; 907 /* initialize pkt counters per src-grp */ 908 rt->mf6c_pkt_cnt = 0; 909 rt->mf6c_byte_cnt = 0; 910 rt->mf6c_wrong_if = 0; 911 912 if (rt->mf6c_expire) 913 n6expire[hash]--; 914 rt->mf6c_expire = 0; 915 } 916 } 917 if (rt == NULL) { 918 /* no upcall, so make a new entry */ 919 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE, 920 M_NOWAIT); 921 if (rt == NULL) { 922 splx(s); 923 return ENOBUFS; 924 } 925 926 /* insert new entry at head of hash chain */ 927 rt->mf6c_origin = mfccp->mf6cc_origin; 928 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 929 rt->mf6c_parent = mfccp->mf6cc_parent; 930 rt->mf6c_ifset = mfccp->mf6cc_ifset; 931 /* initialize pkt counters per src-grp */ 932 rt->mf6c_pkt_cnt = 0; 933 rt->mf6c_byte_cnt = 0; 934 rt->mf6c_wrong_if = 0; 935 rt->mf6c_expire = 0; 936 rt->mf6c_stall = NULL; 937 938 /* link into table */ 939 rt->mf6c_next = mf6ctable[hash]; 940 mf6ctable[hash] = rt; 941 } 942 } 943 splx(s); 944 return 0; 945 } 946 947 #ifdef UPCALL_TIMING 948 /* 949 * collect delay statistics on the upcalls 950 */ 951 static void 952 collate(struct timeval *t) 953 { 954 u_long d; 955 struct timeval tp; 956 u_long delta; 957 958 GET_TIME(tp); 959 960 if (TV_LT(*t, tp)) 961 { 962 TV_DELTA(tp, *t, delta); 963 964 d = delta >> 10; 965 if (d > UPCALL_MAX) 966 d = UPCALL_MAX; 967 968 ++upcall_data[d]; 969 } 970 } 971 #endif /* UPCALL_TIMING */ 972 973 /* 974 * Delete an mfc entry 975 */ 976 static int 977 del_m6fc(struct mf6cctl *mfccp) 978 { 979 struct sockaddr_in6 origin; 980 struct sockaddr_in6 mcastgrp; 981 struct mf6c *rt; 982 struct mf6c **nptr; 983 u_long hash; 984 int s; 985 986 origin = mfccp->mf6cc_origin; 987 mcastgrp = mfccp->mf6cc_mcastgrp; 988 hash = MF6CHASH(origin.sin6_addr, mcastgrp.sin6_addr); 989 990 #ifdef MRT6DEBUG 991 if (mrt6debug & DEBUG_MFC) { 992 char ip6bufo[INET6_ADDRSTRLEN], ip6bufm[INET6_ADDRSTRLEN]; 993 log(LOG_DEBUG,"del_m6fc orig %s mcastgrp %s\n", 994 IN6_PRINT(ip6bufo, &origin.sin6_addr), 995 IN6_PRINT(ip6bufm, &mcastgrp.sin6_addr)); 996 } 997 #endif 998 999 s = splsoftnet(); 1000 1001 nptr = &mf6ctable[hash]; 1002 while ((rt = *nptr) != NULL) { 1003 if (IN6_ARE_ADDR_EQUAL(&origin.sin6_addr, 1004 &rt->mf6c_origin.sin6_addr) && 1005 IN6_ARE_ADDR_EQUAL(&mcastgrp.sin6_addr, 1006 &rt->mf6c_mcastgrp.sin6_addr) && 1007 rt->mf6c_stall == NULL) 1008 break; 1009 1010 nptr = &rt->mf6c_next; 1011 } 1012 if (rt == NULL) { 1013 splx(s); 1014 return EADDRNOTAVAIL; 1015 } 1016 1017 *nptr = rt->mf6c_next; 1018 free(rt, M_MRTABLE); 1019 1020 splx(s); 1021 1022 return 0; 1023 } 1024 1025 static int 1026 socket_send(struct socket *s, struct mbuf *mm, struct sockaddr_in6 *src) 1027 { 1028 if (s) { 1029 if (sbappendaddr(&s->so_rcv, sin6tosa(src), mm, NULL) != 0) { 1030 sorwakeup(s); 1031 return 0; 1032 } 1033 } 1034 m_freem(mm); 1035 return -1; 1036 } 1037 1038 /* 1039 * IPv6 multicast forwarding function. This function assumes that the packet 1040 * pointed to by "ip6" has arrived on (or is about to be sent to) the interface 1041 * pointed to by "ifp", and the packet is to be relayed to other networks 1042 * that have members of the packet's destination IPv6 multicast group. 1043 * 1044 * The packet is returned unscathed to the caller, unless it is 1045 * erroneous, in which case a non-zero return value tells the caller to 1046 * discard it. 1047 */ 1048 1049 int 1050 ip6_mforward(struct ip6_hdr *ip6, struct ifnet *ifp, struct mbuf *m) 1051 { 1052 struct mf6c *rt; 1053 struct mif6 *mifp; 1054 struct mbuf *mm; 1055 int s; 1056 mifi_t mifi; 1057 struct sockaddr_in6 sin6; 1058 char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN]; 1059 1060 #ifdef MRT6DEBUG 1061 if (mrt6debug & DEBUG_FORWARD) 1062 log(LOG_DEBUG, "ip6_mforward: src %s, dst %s, ifindex %d\n", 1063 IN6_PRINT(ip6bufs, &ip6->ip6_src), 1064 IN6_PRINT(ip6bufd, &ip6->ip6_dst), 1065 ifp->if_index); 1066 #endif 1067 1068 /* 1069 * Don't forward a packet with Hop limit of zero or one, 1070 * or a packet destined to a local-only group. 1071 */ 1072 if (ip6->ip6_hlim <= 1 || IN6_IS_ADDR_MC_NODELOCAL(&ip6->ip6_dst) || 1073 IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst)) 1074 return 0; 1075 ip6->ip6_hlim--; 1076 1077 /* 1078 * Source address check: do not forward packets with unspecified 1079 * source. It was discussed in July 2000, on ipngwg mailing list. 1080 * This is rather more serious than unicast cases, because some 1081 * MLD packets can be sent with the unspecified source address 1082 * (although such packets must normally set the hop limit field to 1). 1083 */ 1084 if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) { 1085 IP6_STATINC(IP6_STAT_CANTFORWARD); 1086 if (ip6_log_time + ip6_log_interval < time_uptime) { 1087 ip6_log_time = time_uptime; 1088 log(LOG_DEBUG, 1089 "cannot forward " 1090 "from %s to %s nxt %d received on %s\n", 1091 IN6_PRINT(ip6bufs, &ip6->ip6_src), 1092 IN6_PRINT(ip6bufd, &ip6->ip6_dst), 1093 ip6->ip6_nxt, 1094 m->m_pkthdr.rcvif_index ? 1095 if_name(m_get_rcvif_NOMPSAFE(m)) : "?"); 1096 } 1097 return 0; 1098 } 1099 1100 /* 1101 * Determine forwarding mifs from the forwarding cache table 1102 */ 1103 s = splsoftnet(); 1104 MF6CFIND(ip6->ip6_src, ip6->ip6_dst, rt); 1105 1106 /* Entry exists, so forward if necessary */ 1107 if (rt) { 1108 splx(s); 1109 return (ip6_mdq(m, ifp, rt)); 1110 } else { 1111 /* 1112 * If we don't have a route for packet's origin, 1113 * Make a copy of the packet & 1114 * send message to routing daemon 1115 */ 1116 1117 struct mbuf *mb0; 1118 struct rtdetq *rte; 1119 u_long hash; 1120 /* int i, npkts;*/ 1121 #ifdef UPCALL_TIMING 1122 struct timeval tp; 1123 1124 GET_TIME(tp); 1125 #endif /* UPCALL_TIMING */ 1126 1127 mrt6stat.mrt6s_no_route++; 1128 #ifdef MRT6DEBUG 1129 if (mrt6debug & (DEBUG_FORWARD | DEBUG_MFC)) 1130 log(LOG_DEBUG, "ip6_mforward: no rte s %s g %s\n", 1131 IN6_PRINT(ip6bufs, &ip6->ip6_src), 1132 IN6_PRINT(ip6bufd, &ip6->ip6_dst)); 1133 #endif 1134 1135 /* 1136 * Allocate mbufs early so that we don't do extra work if we 1137 * are just going to fail anyway. 1138 */ 1139 rte = (struct rtdetq *)malloc(sizeof(*rte), M_MRTABLE, 1140 M_NOWAIT); 1141 if (rte == NULL) { 1142 splx(s); 1143 return ENOBUFS; 1144 } 1145 mb0 = m_copy(m, 0, M_COPYALL); 1146 /* 1147 * Pullup packet header if needed before storing it, 1148 * as other references may modify it in the meantime. 1149 */ 1150 if (mb0 && 1151 (M_READONLY(mb0) || mb0->m_len < sizeof(struct ip6_hdr))) 1152 mb0 = m_pullup(mb0, sizeof(struct ip6_hdr)); 1153 if (mb0 == NULL) { 1154 free(rte, M_MRTABLE); 1155 splx(s); 1156 return ENOBUFS; 1157 } 1158 1159 /* is there an upcall waiting for this packet? */ 1160 hash = MF6CHASH(ip6->ip6_src, ip6->ip6_dst); 1161 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 1162 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, 1163 &rt->mf6c_origin.sin6_addr) && 1164 IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, 1165 &rt->mf6c_mcastgrp.sin6_addr) && 1166 (rt->mf6c_stall != NULL)) 1167 break; 1168 } 1169 1170 if (rt == NULL) { 1171 struct mrt6msg *im; 1172 struct omrt6msg *oim; 1173 1174 /* no upcall, so make a new entry */ 1175 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE, 1176 M_NOWAIT); 1177 if (rt == NULL) { 1178 free(rte, M_MRTABLE); 1179 m_freem(mb0); 1180 splx(s); 1181 return ENOBUFS; 1182 } 1183 /* 1184 * Make a copy of the header to send to the user 1185 * level process 1186 */ 1187 mm = m_copy(mb0, 0, sizeof(struct ip6_hdr)); 1188 1189 if (mm == NULL) { 1190 free(rte, M_MRTABLE); 1191 m_freem(mb0); 1192 free(rt, M_MRTABLE); 1193 splx(s); 1194 return ENOBUFS; 1195 } 1196 1197 /* 1198 * Send message to routing daemon 1199 */ 1200 sockaddr_in6_init(&sin6, &ip6->ip6_src, 0, 0, 0); 1201 1202 im = NULL; 1203 oim = NULL; 1204 switch (ip6_mrouter_ver) { 1205 case MRT6_OINIT: 1206 oim = mtod(mm, struct omrt6msg *); 1207 oim->im6_msgtype = MRT6MSG_NOCACHE; 1208 oim->im6_mbz = 0; 1209 break; 1210 case MRT6_INIT: 1211 im = mtod(mm, struct mrt6msg *); 1212 im->im6_msgtype = MRT6MSG_NOCACHE; 1213 im->im6_mbz = 0; 1214 break; 1215 default: 1216 free(rte, M_MRTABLE); 1217 m_freem(mb0); 1218 free(rt, M_MRTABLE); 1219 splx(s); 1220 return EINVAL; 1221 } 1222 1223 #ifdef MRT6DEBUG 1224 if (mrt6debug & DEBUG_FORWARD) 1225 log(LOG_DEBUG, 1226 "getting the iif info in the kernel\n"); 1227 #endif 1228 1229 for (mifp = mif6table, mifi = 0; 1230 mifi < nummifs && mifp->m6_ifp != ifp; 1231 mifp++, mifi++) 1232 ; 1233 1234 switch (ip6_mrouter_ver) { 1235 case MRT6_OINIT: 1236 oim->im6_mif = mifi; 1237 break; 1238 case MRT6_INIT: 1239 im->im6_mif = mifi; 1240 break; 1241 } 1242 1243 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1244 log(LOG_WARNING, "ip6_mforward: ip6_mrouter " 1245 "socket queue full\n"); 1246 mrt6stat.mrt6s_upq_sockfull++; 1247 free(rte, M_MRTABLE); 1248 m_freem(mb0); 1249 free(rt, M_MRTABLE); 1250 splx(s); 1251 return ENOBUFS; 1252 } 1253 1254 mrt6stat.mrt6s_upcalls++; 1255 1256 /* insert new entry at head of hash chain */ 1257 memset(rt, 0, sizeof(*rt)); 1258 sockaddr_in6_init(&rt->mf6c_origin, &ip6->ip6_src, 1259 0, 0, 0); 1260 sockaddr_in6_init(&rt->mf6c_mcastgrp, &ip6->ip6_dst, 1261 0, 0, 0); 1262 rt->mf6c_expire = UPCALL_EXPIRE; 1263 n6expire[hash]++; 1264 rt->mf6c_parent = MF6C_INCOMPLETE_PARENT; 1265 1266 /* link into table */ 1267 rt->mf6c_next = mf6ctable[hash]; 1268 mf6ctable[hash] = rt; 1269 /* Add this entry to the end of the queue */ 1270 rt->mf6c_stall = rte; 1271 } else { 1272 /* determine if q has overflowed */ 1273 struct rtdetq **p; 1274 int npkts = 0; 1275 1276 for (p = &rt->mf6c_stall; *p != NULL; p = &(*p)->next) 1277 if (++npkts > MAX_UPQ6) { 1278 mrt6stat.mrt6s_upq_ovflw++; 1279 free(rte, M_MRTABLE); 1280 m_freem(mb0); 1281 splx(s); 1282 return 0; 1283 } 1284 1285 /* Add this entry to the end of the queue */ 1286 *p = rte; 1287 } 1288 1289 rte->next = NULL; 1290 rte->m = mb0; 1291 rte->ifp = ifp; 1292 #ifdef UPCALL_TIMING 1293 rte->t = tp; 1294 #endif /* UPCALL_TIMING */ 1295 1296 splx(s); 1297 1298 return 0; 1299 } 1300 } 1301 1302 /* 1303 * Clean up cache entries if upcalls are not serviced 1304 * Call from the Slow Timeout mechanism, every 0.25 seconds. 1305 */ 1306 static void 1307 expire_upcalls(void *unused) 1308 { 1309 struct rtdetq *rte; 1310 struct mf6c *mfc, **nptr; 1311 int i; 1312 1313 /* XXX NOMPSAFE still need softnet_lock */ 1314 mutex_enter(softnet_lock); 1315 KERNEL_LOCK(1, NULL); 1316 1317 for (i = 0; i < MF6CTBLSIZ; i++) { 1318 if (n6expire[i] == 0) 1319 continue; 1320 nptr = &mf6ctable[i]; 1321 while ((mfc = *nptr) != NULL) { 1322 rte = mfc->mf6c_stall; 1323 /* 1324 * Skip real cache entries 1325 * Make sure it wasn't marked to not expire (shouldn't happen) 1326 * If it expires now 1327 */ 1328 if (rte != NULL && 1329 mfc->mf6c_expire != 0 && 1330 --mfc->mf6c_expire == 0) { 1331 #ifdef MRT6DEBUG 1332 if (mrt6debug & DEBUG_EXPIRE) { 1333 char ip6bufo[INET6_ADDRSTRLEN]; 1334 char ip6bufm[INET6_ADDRSTRLEN]; 1335 log(LOG_DEBUG, 1336 "expire_upcalls: expiring (%s %s)\n", 1337 IN6_PRINT(ip6bufo, 1338 &mfc->mf6c_origin.sin6_addr), 1339 IN6_PRINT(ip6bufm, 1340 &mfc->mf6c_mcastgrp.sin6_addr)); 1341 } 1342 #endif 1343 /* 1344 * drop all the packets 1345 * free the mbuf with the pkt, if, timing info 1346 */ 1347 do { 1348 struct rtdetq *n = rte->next; 1349 m_freem(rte->m); 1350 free(rte, M_MRTABLE); 1351 rte = n; 1352 } while (rte != NULL); 1353 mrt6stat.mrt6s_cache_cleanups++; 1354 n6expire[i]--; 1355 1356 *nptr = mfc->mf6c_next; 1357 free(mfc, M_MRTABLE); 1358 } else { 1359 nptr = &mfc->mf6c_next; 1360 } 1361 } 1362 } 1363 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 1364 expire_upcalls, NULL); 1365 1366 KERNEL_UNLOCK_ONE(NULL); 1367 mutex_exit(softnet_lock); 1368 } 1369 1370 /* 1371 * Packet forwarding routine once entry in the cache is made 1372 */ 1373 static int 1374 ip6_mdq(struct mbuf *m, struct ifnet *ifp, 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 memset(&sin6, 0, 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_index == 0) { 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 IP6_STATINC(IP6_STAT_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 IP6_STATINC(IP6_STAT_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(struct ip6_hdr *ip6, struct mif6 *mifp, struct mbuf *m) 1548 { 1549 struct mbuf *mb_copy; 1550 struct ifnet *ifp = mifp->m6_ifp; 1551 int error __mrt6debugused = 0; 1552 int s; 1553 static struct route ro; 1554 struct in6_multi *in6m; 1555 struct sockaddr_in6 dst6; 1556 u_long linkmtu; 1557 1558 s = splsoftnet(); 1559 /* 1560 * Make a new reference to the packet; make sure that 1561 * the IPv6 header is actually copied, not just referenced, 1562 * so that ip6_output() only scribbles on the copy. 1563 */ 1564 mb_copy = m_copy(m, 0, M_COPYALL); 1565 if (mb_copy && 1566 (M_READONLY(mb_copy) || mb_copy->m_len < sizeof(struct ip6_hdr))) 1567 mb_copy = m_pullup(mb_copy, sizeof(struct ip6_hdr)); 1568 if (mb_copy == NULL) { 1569 splx(s); 1570 return; 1571 } 1572 /* set MCAST flag to the outgoing packet */ 1573 mb_copy->m_flags |= M_MCAST; 1574 1575 /* 1576 * If we sourced the packet, call ip6_output since we may divide 1577 * the packet into fragments when the packet is too big for the 1578 * outgoing interface. 1579 * Otherwise, we can simply send the packet to the interface 1580 * sending queue. 1581 */ 1582 if (m->m_pkthdr.rcvif_index == 0) { 1583 struct ip6_moptions im6o; 1584 1585 im6o.im6o_multicast_if_index = if_get_index(ifp); 1586 /* XXX: ip6_output will override ip6->ip6_hlim */ 1587 im6o.im6o_multicast_hlim = ip6->ip6_hlim; 1588 im6o.im6o_multicast_loop = 1; 1589 error = ip6_output(mb_copy, NULL, &ro, IPV6_FORWARDING, 1590 &im6o, NULL, NULL); 1591 1592 #ifdef MRT6DEBUG 1593 if (mrt6debug & DEBUG_XMIT) 1594 log(LOG_DEBUG, "phyint_send on mif %td err %d\n", 1595 mifp - mif6table, error); 1596 #endif 1597 splx(s); 1598 return; 1599 } 1600 1601 /* 1602 * If we belong to the destination multicast group 1603 * on the outgoing interface, loop back a copy. 1604 */ 1605 /* 1606 * Does not have to check source info, as it's alreay covered by 1607 * ip6_input 1608 */ 1609 sockaddr_in6_init(&dst6, &ip6->ip6_dst, 0, 0, 0); 1610 1611 IN6_LOOKUP_MULTI(ip6->ip6_dst, ifp, in6m); 1612 if (in6m != NULL) { 1613 ip6_mloopback(ifp, m, 1614 satocsin6(rtcache_getdst(&ro))); 1615 } 1616 1617 /* 1618 * Put the packet into the sending queue of the outgoing interface 1619 * if it would fit in the MTU of the interface. 1620 */ 1621 linkmtu = IN6_LINKMTU(ifp); 1622 if (mb_copy->m_pkthdr.len <= linkmtu || linkmtu < IPV6_MMTU) { 1623 /* 1624 * We could call if_output directly here, but we use 1625 * nd6_output on purpose to see if IPv6 operation is allowed 1626 * on the interface. 1627 */ 1628 error = nd6_output(ifp, ifp, mb_copy, &dst6, NULL); 1629 #ifdef MRT6DEBUG 1630 if (mrt6debug & DEBUG_XMIT) 1631 log(LOG_DEBUG, "phyint_send on mif %td err %d\n", 1632 mifp - mif6table, error); 1633 #endif 1634 } else { 1635 /* 1636 * pMTU discovery is intentionally disabled by default, since 1637 * various router may notify pMTU in multicast, which can be 1638 * a DDoS to a router 1639 */ 1640 if (ip6_mcast_pmtu) 1641 icmp6_error(mb_copy, ICMP6_PACKET_TOO_BIG, 0, linkmtu); 1642 else { 1643 #ifdef MRT6DEBUG 1644 if (mrt6debug & DEBUG_XMIT) { 1645 char ip6bufs[INET6_ADDRSTRLEN]; 1646 char ip6bufd[INET6_ADDRSTRLEN]; 1647 log(LOG_DEBUG, 1648 "phyint_send: packet too big on %s o %s g %s" 1649 " size %d(discarded)\n", 1650 if_name(ifp), 1651 IN6_PRINT(ip6bufs, &ip6->ip6_src), 1652 IN6_PRINT(ip6bufd, &ip6->ip6_dst), 1653 mb_copy->m_pkthdr.len); 1654 } 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(struct ip6_hdr *ip6, struct mif6 *mif, struct mbuf *m) 1665 { 1666 struct mbuf *mm; 1667 int i, len = m->m_pkthdr.len; 1668 struct sockaddr_in6 sin6; 1669 struct mrt6msg *im6; 1670 1671 #ifdef MRT6DEBUG 1672 if (mrt6debug) { 1673 char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN]; 1674 log(LOG_DEBUG, "** IPv6 register_send **\n src %s dst %s\n", 1675 IN6_PRINT(ip6bufs, &ip6->ip6_src), 1676 IN6_PRINT(ip6bufd, &ip6->ip6_dst)); 1677 } 1678 #endif 1679 PIM6_STATINC(PIM6_STAT_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 sockaddr_in6_init(&sin6, &ip6->ip6_src, 0, 0, 0); 1705 1706 im6 = mtod(mm, struct mrt6msg *); 1707 im6->im6_msgtype = MRT6MSG_WHOLEPKT; 1708 im6->im6_mbz = 0; 1709 1710 im6->im6_mif = mif - mif6table; 1711 1712 /* iif info is not given for reg. encap.n */ 1713 mrt6stat.mrt6s_upcalls++; 1714 1715 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1716 #ifdef MRT6DEBUG 1717 if (mrt6debug) 1718 log(LOG_WARNING, 1719 "register_send: ip6_mrouter socket queue full\n"); 1720 #endif 1721 ++mrt6stat.mrt6s_upq_sockfull; 1722 return ENOBUFS; 1723 } 1724 return 0; 1725 } 1726 1727 /* 1728 * PIM sparse mode hook 1729 * Receives the pim control messages, and passes them up to the listening 1730 * socket, using rip6_input. 1731 * The only message processed is the REGISTER pim message; the pim header 1732 * is stripped off, and the inner packet is passed to register_mforward. 1733 */ 1734 int 1735 pim6_input(struct mbuf **mp, int *offp, int proto) 1736 { 1737 struct pim *pim; /* pointer to a pim struct */ 1738 struct ip6_hdr *ip6 __mrt6debugused; 1739 int pimlen; 1740 struct mbuf *m = *mp; 1741 int minlen; 1742 int off = *offp; 1743 1744 PIM6_STATINC(PIM6_STAT_RCV_TOTAL); 1745 1746 ip6 = mtod(m, struct ip6_hdr *); 1747 pimlen = m->m_pkthdr.len - *offp; 1748 1749 /* 1750 * Validate lengths 1751 */ 1752 if (pimlen < PIM_MINLEN) { 1753 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1754 #ifdef MRT6DEBUG 1755 if (mrt6debug & DEBUG_PIM) 1756 log(LOG_DEBUG,"pim6_input: PIM packet too short\n"); 1757 #endif 1758 m_freem(m); 1759 return (IPPROTO_DONE); 1760 } 1761 1762 /* 1763 * if the packet is at least as big as a REGISTER, go ahead 1764 * and grab the PIM REGISTER header size, to avoid another 1765 * possible m_pullup() later. 1766 * 1767 * PIM_MINLEN == pimhdr + u_int32 == 8 1768 * PIM6_REG_MINLEN == pimhdr + reghdr + eip6hdr == 4 + 4 + 40 1769 */ 1770 minlen = (pimlen >= PIM6_REG_MINLEN) ? PIM6_REG_MINLEN : PIM_MINLEN; 1771 1772 /* 1773 * Make sure that the IP6 and PIM headers in contiguous memory, and 1774 * possibly the PIM REGISTER header 1775 */ 1776 IP6_EXTHDR_GET(pim, struct pim *, m, off, minlen); 1777 if (pim == NULL) { 1778 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1779 return IPPROTO_DONE; 1780 } 1781 1782 /* PIM version check */ 1783 if (pim->pim_ver != PIM_VERSION) { 1784 PIM6_STATINC(PIM6_STAT_RCV_BADVERSION); 1785 #ifdef MRT6DEBUG 1786 log(LOG_ERR, 1787 "pim6_input: incorrect version %d, expecting %d\n", 1788 pim->pim_ver, PIM_VERSION); 1789 #endif 1790 m_freem(m); 1791 return (IPPROTO_DONE); 1792 } 1793 1794 #define PIM6_CHECKSUM 1795 #ifdef PIM6_CHECKSUM 1796 { 1797 int cksumlen; 1798 1799 /* 1800 * Validate checksum. 1801 * If PIM REGISTER, exclude the data packet 1802 */ 1803 if (pim->pim_type == PIM_REGISTER) 1804 cksumlen = PIM_MINLEN; 1805 else 1806 cksumlen = pimlen; 1807 1808 if (in6_cksum(m, IPPROTO_PIM, off, cksumlen)) { 1809 PIM6_STATINC(PIM6_STAT_RCV_BADSUM); 1810 #ifdef MRT6DEBUG 1811 if (mrt6debug & DEBUG_PIM) 1812 log(LOG_DEBUG, 1813 "pim6_input: invalid checksum\n"); 1814 #endif 1815 m_freem(m); 1816 return (IPPROTO_DONE); 1817 } 1818 } 1819 #endif /* PIM_CHECKSUM */ 1820 1821 if (pim->pim_type == PIM_REGISTER) { 1822 /* 1823 * since this is a REGISTER, we'll make a copy of the register 1824 * headers ip6+pim+u_int32_t+encap_ip6, to be passed up to the 1825 * routing daemon. 1826 */ 1827 static const struct sockaddr_in6 dst = { 1828 .sin6_len = sizeof(dst), 1829 .sin6_family = AF_INET6, 1830 }; 1831 1832 struct mbuf *mcp; 1833 struct ip6_hdr *eip6; 1834 u_int32_t *reghdr; 1835 1836 PIM6_STATINC(PIM6_STAT_RCV_REGISTERS); 1837 1838 if ((reg_mif_num >= nummifs) || (reg_mif_num == (mifi_t) -1)) { 1839 #ifdef MRT6DEBUG 1840 if (mrt6debug & DEBUG_PIM) 1841 log(LOG_DEBUG, 1842 "pim6_input: register mif not set: %d\n", 1843 reg_mif_num); 1844 #endif 1845 m_freem(m); 1846 return (IPPROTO_DONE); 1847 } 1848 1849 reghdr = (u_int32_t *)(pim + 1); 1850 1851 if ((ntohl(*reghdr) & PIM_NULL_REGISTER)) 1852 goto pim6_input_to_daemon; 1853 1854 /* 1855 * Validate length 1856 */ 1857 if (pimlen < PIM6_REG_MINLEN) { 1858 #ifdef MRT6DEBUG 1859 char ip6buf[INET6_ADDRSTRLEN]; 1860 log(LOG_ERR, 1861 "pim6_input: register packet size too " 1862 "small %d from %s\n", 1863 pimlen, IN6_PRINT(ip6buf, &ip6->ip6_src)); 1864 #endif 1865 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1866 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1867 m_freem(m); 1868 return (IPPROTO_DONE); 1869 } 1870 1871 eip6 = (struct ip6_hdr *) (reghdr + 1); 1872 #ifdef MRT6DEBUG 1873 if (mrt6debug & DEBUG_PIM) { 1874 char ip6bufs[INET6_ADDRSTRLEN]; 1875 char ip6bufd[INET6_ADDRSTRLEN]; 1876 log(LOG_DEBUG, 1877 "pim6_input[register], eip6: %s -> %s, " 1878 "eip6 plen %d\n", 1879 IN6_PRINT(ip6bufs, &eip6->ip6_src), 1880 IN6_PRINT(ip6bufd, &eip6->ip6_dst), 1881 ntohs(eip6->ip6_plen)); 1882 } 1883 #endif 1884 1885 /* verify the version number of the inner packet */ 1886 if ((eip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) { 1887 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1888 #ifdef MRT6DEBUG 1889 log(LOG_DEBUG, "pim6_input: invalid IP version (%d) " 1890 "of the inner packet\n", 1891 (eip6->ip6_vfc & IPV6_VERSION)); 1892 #endif 1893 m_freem(m); 1894 return (IPPROTO_NONE); 1895 } 1896 1897 /* verify the inner packet is destined to a mcast group */ 1898 if (!IN6_IS_ADDR_MULTICAST(&eip6->ip6_dst)) { 1899 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1900 #ifdef MRT6DEBUG 1901 if (mrt6debug & DEBUG_PIM) { 1902 char ip6buf[INET6_ADDRSTRLEN]; 1903 log(LOG_DEBUG, 1904 "pim6_input: inner packet of register " 1905 "is not multicast %s\n", 1906 IN6_PRINT(ip6buf, &eip6->ip6_dst)); 1907 } 1908 #endif 1909 m_freem(m); 1910 return (IPPROTO_DONE); 1911 } 1912 1913 /* 1914 * make a copy of the whole header to pass to the daemon later. 1915 */ 1916 mcp = m_copy(m, 0, off + PIM6_REG_MINLEN); 1917 if (mcp == NULL) { 1918 #ifdef MRT6DEBUG 1919 log(LOG_ERR, 1920 "pim6_input: pim register: " 1921 "could not copy register head\n"); 1922 #endif 1923 m_freem(m); 1924 return (IPPROTO_DONE); 1925 } 1926 1927 /* 1928 * forward the inner ip6 packet; point m_data at the inner ip6. 1929 */ 1930 m_adj(m, off + PIM_MINLEN); 1931 #ifdef MRT6DEBUG 1932 if (mrt6debug & DEBUG_PIM) { 1933 char ip6bufs[INET6_ADDRSTRLEN]; 1934 char ip6bufd[INET6_ADDRSTRLEN]; 1935 log(LOG_DEBUG, 1936 "pim6_input: forwarding decapsulated register: " 1937 "src %s, dst %s, mif %d\n", 1938 IN6_PRINT(ip6bufs, &eip6->ip6_src), 1939 IN6_PRINT(ip6bufd, &eip6->ip6_dst), 1940 reg_mif_num); 1941 } 1942 #endif 1943 1944 looutput(mif6table[reg_mif_num].m6_ifp, m, sin6tocsa(&dst), 1945 NULL); 1946 1947 /* prepare the register head to send to the mrouting daemon */ 1948 m = mcp; 1949 } 1950 1951 /* 1952 * Pass the PIM message up to the daemon; if it is a register message 1953 * pass the 'head' only up to the daemon. This includes the 1954 * encapsulator ip6 header, pim header, register header and the 1955 * encapsulated ip6 header. 1956 */ 1957 pim6_input_to_daemon: 1958 rip6_input(&m, offp, proto); 1959 return (IPPROTO_DONE); 1960 } 1961 1962 static int 1963 sysctl_net_inet6_pim6_stats(SYSCTLFN_ARGS) 1964 { 1965 1966 return (NETSTAT_SYSCTL(pim6stat_percpu, PIM6_NSTATS)); 1967 } 1968 1969 static void 1970 sysctl_net_inet6_pim6_setup(struct sysctllog **clog) 1971 { 1972 1973 sysctl_createv(clog, 0, NULL, NULL, 1974 CTLFLAG_PERMANENT, 1975 CTLTYPE_NODE, "inet6", NULL, 1976 NULL, 0, NULL, 0, 1977 CTL_NET, PF_INET6, CTL_EOL); 1978 sysctl_createv(clog, 0, NULL, NULL, 1979 CTLFLAG_PERMANENT, 1980 CTLTYPE_NODE, "pim6", 1981 SYSCTL_DESCR("PIMv6 settings"), 1982 NULL, 0, NULL, 0, 1983 CTL_NET, PF_INET6, IPPROTO_PIM, CTL_EOL); 1984 1985 sysctl_createv(clog, 0, NULL, NULL, 1986 CTLFLAG_PERMANENT, 1987 CTLTYPE_STRUCT, "stats", 1988 SYSCTL_DESCR("PIMv6 statistics"), 1989 sysctl_net_inet6_pim6_stats, 0, NULL, 0, 1990 CTL_NET, PF_INET6, IPPROTO_PIM, PIM6CTL_STATS, 1991 CTL_EOL); 1992 } 1993