1 /* $NetBSD: ip6_mroute.c,v 1.107 2014/05/17 21:26:20 rmind 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 1.107 2014/05/17 21:26:20 rmind Exp $"); 121 122 #include "opt_inet.h" 123 #include "opt_mrouting.h" 124 125 #include <sys/param.h> 126 #include <sys/systm.h> 127 #include <sys/callout.h> 128 #include <sys/mbuf.h> 129 #include <sys/socket.h> 130 #include <sys/socketvar.h> 131 #include <sys/sockio.h> 132 #include <sys/protosw.h> 133 #include <sys/errno.h> 134 #include <sys/time.h> 135 #include <sys/kernel.h> 136 #include <sys/ioctl.h> 137 #include <sys/sysctl.h> 138 #include <sys/syslog.h> 139 140 #include <net/if.h> 141 #include <net/route.h> 142 #include <net/raw_cb.h> 143 #include <net/net_stats.h> 144 145 #include <netinet/in.h> 146 #include <netinet/in_var.h> 147 #include <netinet/icmp6.h> 148 149 #include <netinet/ip6.h> 150 #include <netinet6/ip6_var.h> 151 #include <netinet6/ip6_private.h> 152 #include <netinet6/ip6_mroute.h> 153 #include <netinet6/scope6_var.h> 154 #include <netinet6/pim6.h> 155 #include <netinet6/pim6_var.h> 156 #include <netinet6/nd6.h> 157 158 #include <net/net_osdep.h> 159 160 static int ip6_mdq(struct mbuf *, struct ifnet *, struct mf6c *); 161 static void phyint_send(struct ip6_hdr *, struct mif6 *, struct mbuf *); 162 163 static int set_pim6(int *); 164 static int socket_send(struct socket *, struct mbuf *, 165 struct sockaddr_in6 *); 166 static int register_send(struct ip6_hdr *, struct mif6 *, struct mbuf *); 167 168 /* 169 * Globals. All but ip6_mrouter, ip6_mrtproto and mrt6stat could be static, 170 * except for netstat or debugging purposes. 171 */ 172 struct socket *ip6_mrouter = NULL; 173 int ip6_mrouter_ver = 0; 174 int ip6_mrtproto = IPPROTO_PIM; /* for netstat only */ 175 struct mrt6stat mrt6stat; 176 177 #define NO_RTE_FOUND 0x1 178 #define RTE_FOUND 0x2 179 180 struct mf6c *mf6ctable[MF6CTBLSIZ]; 181 u_char n6expire[MF6CTBLSIZ]; 182 struct mif6 mif6table[MAXMIFS]; 183 #ifdef MRT6DEBUG 184 u_int mrt6debug = 0; /* debug level */ 185 #define DEBUG_MFC 0x02 186 #define DEBUG_FORWARD 0x04 187 #define DEBUG_EXPIRE 0x08 188 #define DEBUG_XMIT 0x10 189 #define DEBUG_REG 0x20 190 #define DEBUG_PIM 0x40 191 #define __mrt6debugused /* empty */ 192 #else 193 #define __mrt6debugused __unused 194 #endif 195 196 static void expire_upcalls(void *); 197 #define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */ 198 #define UPCALL_EXPIRE 6 /* number of timeouts */ 199 200 #ifdef INET 201 #ifdef MROUTING 202 extern struct socket *ip_mrouter; 203 #endif 204 #endif 205 206 /* 207 * 'Interfaces' associated with decapsulator (so we can tell 208 * packets that went through it from ones that get reflected 209 * by a broken gateway). These interfaces are never linked into 210 * the system ifnet list & no routes point to them. I.e., packets 211 * can't be sent this way. They only exist as a placeholder for 212 * multicast source verification. 213 */ 214 struct ifnet multicast_register_if6; 215 216 #define ENCAP_HOPS 64 217 218 /* 219 * Private variables. 220 */ 221 static mifi_t nummifs = 0; 222 static mifi_t reg_mif_num = (mifi_t)-1; 223 224 static percpu_t *pim6stat_percpu; 225 226 #define PIM6_STATINC(x) _NET_STATINC(pim6stat_percpu, x) 227 228 static int pim6; 229 230 /* 231 * Hash function for a source, group entry 232 */ 233 #define MF6CHASH(a, g) MF6CHASHMOD((a).s6_addr32[0] ^ (a).s6_addr32[1] ^ \ 234 (a).s6_addr32[2] ^ (a).s6_addr32[3] ^ \ 235 (g).s6_addr32[0] ^ (g).s6_addr32[1] ^ \ 236 (g).s6_addr32[2] ^ (g).s6_addr32[3]) 237 238 /* 239 * Find a route for a given origin IPv6 address and Multicast group address. 240 * Quality of service parameter to be added in the future!!! 241 */ 242 243 #define MF6CFIND(o, g, rt) do { \ 244 struct mf6c *_rt = mf6ctable[MF6CHASH(o,g)]; \ 245 rt = NULL; \ 246 mrt6stat.mrt6s_mfc_lookups++; \ 247 while (_rt) { \ 248 if (IN6_ARE_ADDR_EQUAL(&_rt->mf6c_origin.sin6_addr, &(o)) && \ 249 IN6_ARE_ADDR_EQUAL(&_rt->mf6c_mcastgrp.sin6_addr, &(g)) && \ 250 (_rt->mf6c_stall == NULL)) { \ 251 rt = _rt; \ 252 break; \ 253 } \ 254 _rt = _rt->mf6c_next; \ 255 } \ 256 if (rt == NULL) { \ 257 mrt6stat.mrt6s_mfc_misses++; \ 258 } \ 259 } while (/*CONSTCOND*/ 0) 260 261 /* 262 * Macros to compute elapsed time efficiently 263 * Borrowed from Van Jacobson's scheduling code 264 */ 265 #define TV_DELTA(a, b, delta) do { \ 266 int xxs; \ 267 \ 268 delta = (a).tv_usec - (b).tv_usec; \ 269 if ((xxs = (a).tv_sec - (b).tv_sec)) { \ 270 switch (xxs) { \ 271 case 2: \ 272 delta += 1000000; \ 273 /* FALLTHROUGH */ \ 274 case 1: \ 275 delta += 1000000; \ 276 break; \ 277 default: \ 278 delta += (1000000 * xxs); \ 279 } \ 280 } \ 281 } while (/*CONSTCOND*/ 0) 282 283 #define TV_LT(a, b) (((a).tv_usec < (b).tv_usec && \ 284 (a).tv_sec <= (b).tv_sec) || (a).tv_sec < (b).tv_sec) 285 286 #ifdef UPCALL_TIMING 287 #define UPCALL_MAX 50 288 u_long upcall_data[UPCALL_MAX + 1]; 289 static void collate(); 290 #endif /* UPCALL_TIMING */ 291 292 static int get_sg_cnt(struct sioc_sg_req6 *); 293 static int get_mif6_cnt(struct sioc_mif_req6 *); 294 static int ip6_mrouter_init(struct socket *, int, int); 295 static int add_m6if(struct mif6ctl *); 296 static int del_m6if(mifi_t *); 297 static int add_m6fc(struct mf6cctl *); 298 static int del_m6fc(struct mf6cctl *); 299 static void sysctl_net_inet6_pim6_setup(struct sysctllog **); 300 301 static callout_t expire_upcalls_ch; 302 303 void 304 pim6_init(void) 305 { 306 307 sysctl_net_inet6_pim6_setup(NULL); 308 pim6stat_percpu = percpu_alloc(sizeof(uint64_t) * PIM6_NSTATS); 309 } 310 311 /* 312 * Handle MRT setsockopt commands to modify the multicast routing tables. 313 */ 314 int 315 ip6_mrouter_set(struct socket *so, struct sockopt *sopt) 316 { 317 int error, optval; 318 struct mif6ctl mifc; 319 struct mf6cctl mfcc; 320 mifi_t mifi; 321 322 if (sopt->sopt_name != MRT6_INIT && so != ip6_mrouter) 323 return (EACCES); 324 325 error = 0; 326 327 switch (sopt->sopt_name) { 328 #ifdef MRT6_OINIT 329 case MRT6_OINIT: 330 #endif 331 case MRT6_INIT: 332 error = sockopt_getint(sopt, &optval); 333 if (error) 334 break; 335 return (ip6_mrouter_init(so, optval, sopt->sopt_name)); 336 case MRT6_DONE: 337 return (ip6_mrouter_done()); 338 case MRT6_ADD_MIF: 339 error = sockopt_get(sopt, &mifc, sizeof(mifc)); 340 if (error) 341 break; 342 return (add_m6if(&mifc)); 343 case MRT6_DEL_MIF: 344 error = sockopt_get(sopt, &mifi, sizeof(mifi)); 345 if (error) 346 break; 347 return (del_m6if(&mifi)); 348 case MRT6_ADD_MFC: 349 error = sockopt_get(sopt, &mfcc, sizeof(mfcc)); 350 if (error) 351 break; 352 return (add_m6fc(&mfcc)); 353 case MRT6_DEL_MFC: 354 error = sockopt_get(sopt, &mfcc, sizeof(mfcc)); 355 if (error) 356 break; 357 return (del_m6fc(&mfcc)); 358 case MRT6_PIM: 359 error = sockopt_getint(sopt, &optval); 360 if (error) 361 break; 362 return (set_pim6(&optval)); 363 default: 364 error = EOPNOTSUPP; 365 } 366 367 return (error); 368 } 369 370 /* 371 * Handle MRT getsockopt commands 372 */ 373 int 374 ip6_mrouter_get(struct socket *so, struct sockopt *sopt) 375 { 376 int error; 377 378 if (so != ip6_mrouter) return EACCES; 379 380 error = 0; 381 382 switch (sopt->sopt_name) { 383 case MRT6_PIM: 384 error = sockopt_set(sopt, &pim6, sizeof(pim6)); 385 break; 386 default: 387 error = EOPNOTSUPP; 388 break; 389 } 390 391 return (error); 392 } 393 394 /* 395 * Handle ioctl commands to obtain information from the cache 396 */ 397 int 398 mrt6_ioctl(u_long cmd, void *data) 399 { 400 401 switch (cmd) { 402 case SIOCGETSGCNT_IN6: 403 return (get_sg_cnt((struct sioc_sg_req6 *)data)); 404 case SIOCGETMIFCNT_IN6: 405 return (get_mif6_cnt((struct sioc_mif_req6 *)data)); 406 default: 407 return (EINVAL); 408 } 409 } 410 411 /* 412 * returns the packet, byte, rpf-failure count for the source group provided 413 */ 414 static int 415 get_sg_cnt(struct sioc_sg_req6 *req) 416 { 417 struct mf6c *rt; 418 int s; 419 420 s = splsoftnet(); 421 MF6CFIND(req->src.sin6_addr, req->grp.sin6_addr, rt); 422 splx(s); 423 if (rt != NULL) { 424 req->pktcnt = rt->mf6c_pkt_cnt; 425 req->bytecnt = rt->mf6c_byte_cnt; 426 req->wrong_if = rt->mf6c_wrong_if; 427 } else 428 return (ESRCH); 429 #if 0 430 req->pktcnt = req->bytecnt = req->wrong_if = 0xffffffff; 431 #endif 432 433 return 0; 434 } 435 436 /* 437 * returns the input and output packet and byte counts on the mif provided 438 */ 439 static int 440 get_mif6_cnt(struct sioc_mif_req6 *req) 441 { 442 mifi_t mifi = req->mifi; 443 444 if (mifi >= nummifs) 445 return EINVAL; 446 447 req->icount = mif6table[mifi].m6_pkt_in; 448 req->ocount = mif6table[mifi].m6_pkt_out; 449 req->ibytes = mif6table[mifi].m6_bytes_in; 450 req->obytes = mif6table[mifi].m6_bytes_out; 451 452 return 0; 453 } 454 455 static int 456 set_pim6(int *i) 457 { 458 if ((*i != 1) && (*i != 0)) 459 return EINVAL; 460 461 pim6 = *i; 462 463 return 0; 464 } 465 466 /* 467 * Enable multicast routing 468 */ 469 static int 470 ip6_mrouter_init(struct socket *so, int v, int cmd) 471 { 472 #ifdef MRT6DEBUG 473 if (mrt6debug) 474 log(LOG_DEBUG, 475 "ip6_mrouter_init: so_type = %d, pr_protocol = %d\n", 476 so->so_type, so->so_proto->pr_protocol); 477 #endif 478 479 if (so->so_type != SOCK_RAW || 480 so->so_proto->pr_protocol != IPPROTO_ICMPV6) 481 return (EOPNOTSUPP); 482 483 if (v != 1) 484 return (ENOPROTOOPT); 485 486 if (ip6_mrouter != NULL) 487 return (EADDRINUSE); 488 489 ip6_mrouter = so; 490 ip6_mrouter_ver = cmd; 491 492 memset((void *)mf6ctable, 0, sizeof(mf6ctable)); 493 memset((void *)n6expire, 0, sizeof(n6expire)); 494 495 pim6 = 0;/* used for stubbing out/in pim stuff */ 496 497 callout_init(&expire_upcalls_ch, CALLOUT_MPSAFE); 498 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 499 expire_upcalls, NULL); 500 501 #ifdef MRT6DEBUG 502 if (mrt6debug) 503 log(LOG_DEBUG, "ip6_mrouter_init\n"); 504 #endif 505 506 return 0; 507 } 508 509 /* 510 * Disable multicast routing 511 */ 512 int 513 ip6_mrouter_done(void) 514 { 515 mifi_t mifi; 516 int i; 517 struct ifnet *ifp; 518 struct sockaddr_in6 sin6; 519 struct mf6c *rt; 520 struct rtdetq *rte; 521 int s; 522 523 s = splsoftnet(); 524 525 /* 526 * For each phyint in use, disable promiscuous reception of all IPv6 527 * multicasts. 528 */ 529 #ifdef INET 530 #ifdef MROUTING 531 /* 532 * If there is still IPv4 multicast routing daemon, 533 * we remain interfaces to receive all muliticasted packets. 534 * XXX: there may be an interface in which the IPv4 multicast 535 * daemon is not interested... 536 */ 537 if (!ip_mrouter) 538 #endif 539 #endif 540 { 541 for (mifi = 0; mifi < nummifs; mifi++) { 542 if (mif6table[mifi].m6_ifp && 543 !(mif6table[mifi].m6_flags & MIFF_REGISTER)) { 544 sin6.sin6_family = AF_INET6; 545 sin6.sin6_addr = in6addr_any; 546 ifp = mif6table[mifi].m6_ifp; 547 if_mcast_op(ifp, SIOCDELMULTI, 548 sin6tocsa(&sin6)); 549 } 550 } 551 } 552 #ifdef notyet 553 memset((void *)qtable, 0, sizeof(qtable)); 554 memset((void *)tbftable, 0, sizeof(tbftable)); 555 #endif 556 memset((void *)mif6table, 0, sizeof(mif6table)); 557 nummifs = 0; 558 559 pim6 = 0; /* used to stub out/in pim specific code */ 560 561 callout_stop(&expire_upcalls_ch); 562 563 /* 564 * Free all multicast forwarding cache entries. 565 */ 566 for (i = 0; i < MF6CTBLSIZ; i++) { 567 rt = mf6ctable[i]; 568 while (rt) { 569 struct mf6c *frt; 570 571 for (rte = rt->mf6c_stall; rte != NULL; ) { 572 struct rtdetq *n = rte->next; 573 574 m_freem(rte->m); 575 free(rte, M_MRTABLE); 576 rte = n; 577 } 578 frt = rt; 579 rt = rt->mf6c_next; 580 free(frt, M_MRTABLE); 581 } 582 } 583 584 memset((void *)mf6ctable, 0, sizeof(mf6ctable)); 585 586 /* 587 * Reset register interface 588 */ 589 if (reg_mif_num != (mifi_t)-1) { 590 if_detach(&multicast_register_if6); 591 reg_mif_num = (mifi_t)-1; 592 } 593 594 ip6_mrouter = NULL; 595 ip6_mrouter_ver = 0; 596 597 splx(s); 598 599 #ifdef MRT6DEBUG 600 if (mrt6debug) 601 log(LOG_DEBUG, "ip6_mrouter_done\n"); 602 #endif 603 604 return 0; 605 } 606 607 void 608 ip6_mrouter_detach(struct ifnet *ifp) 609 { 610 struct rtdetq *rte; 611 struct mf6c *mfc; 612 mifi_t mifi; 613 int i; 614 615 if (ip6_mrouter == NULL) 616 return; 617 618 /* 619 * Delete a mif which points to ifp. 620 */ 621 for (mifi = 0; mifi < nummifs; mifi++) 622 if (mif6table[mifi].m6_ifp == ifp) 623 del_m6if(&mifi); 624 625 /* 626 * Clear rte->ifp of cache entries received on ifp. 627 */ 628 for (i = 0; i < MF6CTBLSIZ; i++) { 629 if (n6expire[i] == 0) 630 continue; 631 632 for (mfc = mf6ctable[i]; mfc != NULL; mfc = mfc->mf6c_next) { 633 for (rte = mfc->mf6c_stall; rte != NULL; rte = rte->next) { 634 if (rte->ifp == ifp) 635 rte->ifp = NULL; 636 } 637 } 638 } 639 } 640 641 642 /* 643 * Add a mif to the mif table 644 */ 645 static int 646 add_m6if(struct mif6ctl *mifcp) 647 { 648 struct mif6 *mifp; 649 struct ifnet *ifp; 650 struct sockaddr_in6 sin6; 651 int error, s; 652 #ifdef notyet 653 struct tbf *m_tbf = tbftable + mifcp->mif6c_mifi; 654 #endif 655 656 if (mifcp->mif6c_mifi >= MAXMIFS) 657 return EINVAL; 658 mifp = mif6table + mifcp->mif6c_mifi; 659 if (mifp->m6_ifp) 660 return EADDRINUSE; /* XXX: is it appropriate? */ 661 if (!mifcp->mif6c_pifi || (ifp = if_byindex(mifcp->mif6c_pifi)) == NULL) 662 return ENXIO; 663 664 if (mifcp->mif6c_flags & MIFF_REGISTER) { 665 ifp = &multicast_register_if6; 666 667 if (reg_mif_num == (mifi_t)-1) { 668 strlcpy(ifp->if_xname, "register_mif", 669 sizeof(ifp->if_xname)); 670 ifp->if_flags |= IFF_LOOPBACK; 671 ifp->if_index = mifcp->mif6c_mifi; 672 reg_mif_num = mifcp->mif6c_mifi; 673 if_attach(ifp); 674 } 675 676 } /* if REGISTER */ 677 else { 678 /* Make sure the interface supports multicast */ 679 if ((ifp->if_flags & IFF_MULTICAST) == 0) 680 return EOPNOTSUPP; 681 682 s = splsoftnet(); 683 /* 684 * Enable promiscuous reception of all IPv6 multicasts 685 * from the interface. 686 */ 687 sin6.sin6_family = AF_INET6; 688 sin6.sin6_addr = in6addr_any; 689 error = if_mcast_op(ifp, SIOCADDMULTI, sin6tosa(&sin6)); 690 splx(s); 691 if (error) 692 return error; 693 } 694 695 s = splsoftnet(); 696 mifp->m6_flags = mifcp->mif6c_flags; 697 mifp->m6_ifp = ifp; 698 #ifdef notyet 699 /* scaling up here allows division by 1024 in critical code */ 700 mifp->m6_rate_limit = mifcp->mif6c_rate_limit * 1024 / 1000; 701 #endif 702 /* initialize per mif pkt counters */ 703 mifp->m6_pkt_in = 0; 704 mifp->m6_pkt_out = 0; 705 mifp->m6_bytes_in = 0; 706 mifp->m6_bytes_out = 0; 707 splx(s); 708 709 /* Adjust nummifs up if the mifi is higher than nummifs */ 710 if (nummifs <= mifcp->mif6c_mifi) 711 nummifs = mifcp->mif6c_mifi + 1; 712 713 #ifdef MRT6DEBUG 714 if (mrt6debug) 715 log(LOG_DEBUG, 716 "add_mif #%d, phyint %s\n", 717 mifcp->mif6c_mifi, ifp->if_xname); 718 #endif 719 720 return 0; 721 } 722 723 /* 724 * Delete a mif from the mif table 725 */ 726 static int 727 del_m6if(mifi_t *mifip) 728 { 729 struct mif6 *mifp = mif6table + *mifip; 730 mifi_t mifi; 731 struct ifnet *ifp; 732 struct sockaddr_in6 sin6; 733 int s; 734 735 if (*mifip >= nummifs) 736 return EINVAL; 737 if (mifp->m6_ifp == NULL) 738 return EINVAL; 739 740 s = splsoftnet(); 741 742 if (!(mifp->m6_flags & MIFF_REGISTER)) { 743 /* 744 * XXX: what if there is yet IPv4 multicast daemon 745 * using the interface? 746 */ 747 ifp = mifp->m6_ifp; 748 749 sin6.sin6_family = AF_INET6; 750 sin6.sin6_addr = in6addr_any; 751 if_mcast_op(ifp, SIOCDELMULTI, sin6tosa(&sin6)); 752 } else { 753 if (reg_mif_num != (mifi_t)-1) { 754 if_detach(&multicast_register_if6); 755 reg_mif_num = (mifi_t)-1; 756 } 757 } 758 759 #ifdef notyet 760 memset((void *)qtable[*mifip], 0, sizeof(qtable[*mifip])); 761 memset((void *)mifp->m6_tbf, 0, sizeof(*(mifp->m6_tbf))); 762 #endif 763 memset((void *)mifp, 0, sizeof (*mifp)); 764 765 /* Adjust nummifs down */ 766 for (mifi = nummifs; mifi > 0; mifi--) 767 if (mif6table[mifi - 1].m6_ifp) 768 break; 769 nummifs = mifi; 770 771 splx(s); 772 773 #ifdef MRT6DEBUG 774 if (mrt6debug) 775 log(LOG_DEBUG, "del_m6if %d, nummifs %d\n", *mifip, nummifs); 776 #endif 777 778 return 0; 779 } 780 781 /* 782 * Add an mfc entry 783 */ 784 static int 785 add_m6fc(struct mf6cctl *mfccp) 786 { 787 struct mf6c *rt; 788 u_long hash; 789 struct rtdetq *rte; 790 u_short nstl; 791 int s; 792 793 MF6CFIND(mfccp->mf6cc_origin.sin6_addr, 794 mfccp->mf6cc_mcastgrp.sin6_addr, rt); 795 796 /* If an entry already exists, just update the fields */ 797 if (rt) { 798 #ifdef MRT6DEBUG 799 if (mrt6debug & DEBUG_MFC) 800 log(LOG_DEBUG,"add_m6fc update o %s g %s p %x\n", 801 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 802 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 803 mfccp->mf6cc_parent); 804 #endif 805 806 s = splsoftnet(); 807 rt->mf6c_parent = mfccp->mf6cc_parent; 808 rt->mf6c_ifset = mfccp->mf6cc_ifset; 809 splx(s); 810 return 0; 811 } 812 813 /* 814 * Find the entry for which the upcall was made and update 815 */ 816 s = splsoftnet(); 817 hash = MF6CHASH(mfccp->mf6cc_origin.sin6_addr, 818 mfccp->mf6cc_mcastgrp.sin6_addr); 819 for (rt = mf6ctable[hash], nstl = 0; rt; rt = rt->mf6c_next) { 820 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 821 &mfccp->mf6cc_origin.sin6_addr) && 822 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 823 &mfccp->mf6cc_mcastgrp.sin6_addr) && 824 (rt->mf6c_stall != NULL)) { 825 826 if (nstl++) 827 log(LOG_ERR, 828 "add_m6fc: %s o %s g %s p %x dbx %p\n", 829 "multiple kernel entries", 830 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 831 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 832 mfccp->mf6cc_parent, rt->mf6c_stall); 833 834 #ifdef MRT6DEBUG 835 if (mrt6debug & DEBUG_MFC) 836 log(LOG_DEBUG, 837 "add_m6fc o %s g %s p %x dbg %p\n", 838 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 839 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 840 mfccp->mf6cc_parent, rt->mf6c_stall); 841 #endif 842 843 rt->mf6c_origin = mfccp->mf6cc_origin; 844 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 845 rt->mf6c_parent = mfccp->mf6cc_parent; 846 rt->mf6c_ifset = mfccp->mf6cc_ifset; 847 /* initialize pkt counters per src-grp */ 848 rt->mf6c_pkt_cnt = 0; 849 rt->mf6c_byte_cnt = 0; 850 rt->mf6c_wrong_if = 0; 851 852 rt->mf6c_expire = 0; /* Don't clean this guy up */ 853 n6expire[hash]--; 854 855 /* free packets Qed at the end of this entry */ 856 for (rte = rt->mf6c_stall; rte != NULL; ) { 857 struct rtdetq *n = rte->next; 858 if (rte->ifp) { 859 ip6_mdq(rte->m, rte->ifp, rt); 860 } 861 m_freem(rte->m); 862 #ifdef UPCALL_TIMING 863 collate(&(rte->t)); 864 #endif /* UPCALL_TIMING */ 865 free(rte, M_MRTABLE); 866 rte = n; 867 } 868 rt->mf6c_stall = NULL; 869 } 870 } 871 872 /* 873 * It is possible that an entry is being inserted without an upcall 874 */ 875 if (nstl == 0) { 876 #ifdef MRT6DEBUG 877 if (mrt6debug & DEBUG_MFC) 878 log(LOG_DEBUG, 879 "add_mfc no upcall h %ld o %s g %s p %x\n", 880 hash, 881 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 882 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 883 mfccp->mf6cc_parent); 884 #endif 885 886 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 887 888 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 889 &mfccp->mf6cc_origin.sin6_addr)&& 890 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 891 &mfccp->mf6cc_mcastgrp.sin6_addr)) { 892 893 rt->mf6c_origin = mfccp->mf6cc_origin; 894 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 895 rt->mf6c_parent = mfccp->mf6cc_parent; 896 rt->mf6c_ifset = mfccp->mf6cc_ifset; 897 /* initialize pkt counters per src-grp */ 898 rt->mf6c_pkt_cnt = 0; 899 rt->mf6c_byte_cnt = 0; 900 rt->mf6c_wrong_if = 0; 901 902 if (rt->mf6c_expire) 903 n6expire[hash]--; 904 rt->mf6c_expire = 0; 905 } 906 } 907 if (rt == NULL) { 908 /* no upcall, so make a new entry */ 909 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE, 910 M_NOWAIT); 911 if (rt == NULL) { 912 splx(s); 913 return ENOBUFS; 914 } 915 916 /* insert new entry at head of hash chain */ 917 rt->mf6c_origin = mfccp->mf6cc_origin; 918 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 919 rt->mf6c_parent = mfccp->mf6cc_parent; 920 rt->mf6c_ifset = mfccp->mf6cc_ifset; 921 /* initialize pkt counters per src-grp */ 922 rt->mf6c_pkt_cnt = 0; 923 rt->mf6c_byte_cnt = 0; 924 rt->mf6c_wrong_if = 0; 925 rt->mf6c_expire = 0; 926 rt->mf6c_stall = NULL; 927 928 /* link into table */ 929 rt->mf6c_next = mf6ctable[hash]; 930 mf6ctable[hash] = rt; 931 } 932 } 933 splx(s); 934 return 0; 935 } 936 937 #ifdef UPCALL_TIMING 938 /* 939 * collect delay statistics on the upcalls 940 */ 941 static void 942 collate(struct timeval *t) 943 { 944 u_long d; 945 struct timeval tp; 946 u_long delta; 947 948 GET_TIME(tp); 949 950 if (TV_LT(*t, tp)) 951 { 952 TV_DELTA(tp, *t, delta); 953 954 d = delta >> 10; 955 if (d > UPCALL_MAX) 956 d = UPCALL_MAX; 957 958 ++upcall_data[d]; 959 } 960 } 961 #endif /* UPCALL_TIMING */ 962 963 /* 964 * Delete an mfc entry 965 */ 966 static int 967 del_m6fc(struct mf6cctl *mfccp) 968 { 969 struct sockaddr_in6 origin; 970 struct sockaddr_in6 mcastgrp; 971 struct mf6c *rt; 972 struct mf6c **nptr; 973 u_long hash; 974 int s; 975 976 origin = mfccp->mf6cc_origin; 977 mcastgrp = mfccp->mf6cc_mcastgrp; 978 hash = MF6CHASH(origin.sin6_addr, mcastgrp.sin6_addr); 979 980 #ifdef MRT6DEBUG 981 if (mrt6debug & DEBUG_MFC) 982 log(LOG_DEBUG,"del_m6fc orig %s mcastgrp %s\n", 983 ip6_sprintf(&origin.sin6_addr), 984 ip6_sprintf(&mcastgrp.sin6_addr)); 985 #endif 986 987 s = splsoftnet(); 988 989 nptr = &mf6ctable[hash]; 990 while ((rt = *nptr) != NULL) { 991 if (IN6_ARE_ADDR_EQUAL(&origin.sin6_addr, 992 &rt->mf6c_origin.sin6_addr) && 993 IN6_ARE_ADDR_EQUAL(&mcastgrp.sin6_addr, 994 &rt->mf6c_mcastgrp.sin6_addr) && 995 rt->mf6c_stall == NULL) 996 break; 997 998 nptr = &rt->mf6c_next; 999 } 1000 if (rt == NULL) { 1001 splx(s); 1002 return EADDRNOTAVAIL; 1003 } 1004 1005 *nptr = rt->mf6c_next; 1006 free(rt, M_MRTABLE); 1007 1008 splx(s); 1009 1010 return 0; 1011 } 1012 1013 static int 1014 socket_send(struct socket *s, struct mbuf *mm, struct sockaddr_in6 *src) 1015 { 1016 if (s) { 1017 if (sbappendaddr(&s->so_rcv, 1018 (struct sockaddr *)src, mm, NULL) != 0) { 1019 sorwakeup(s); 1020 return 0; 1021 } 1022 } 1023 m_freem(mm); 1024 return -1; 1025 } 1026 1027 /* 1028 * IPv6 multicast forwarding function. This function assumes that the packet 1029 * pointed to by "ip6" has arrived on (or is about to be sent to) the interface 1030 * pointed to by "ifp", and the packet is to be relayed to other networks 1031 * that have members of the packet's destination IPv6 multicast group. 1032 * 1033 * The packet is returned unscathed to the caller, unless it is 1034 * erroneous, in which case a non-zero return value tells the caller to 1035 * discard it. 1036 */ 1037 1038 int 1039 ip6_mforward(struct ip6_hdr *ip6, struct ifnet *ifp, struct mbuf *m) 1040 { 1041 struct mf6c *rt; 1042 struct mif6 *mifp; 1043 struct mbuf *mm; 1044 int s; 1045 mifi_t mifi; 1046 struct sockaddr_in6 sin6; 1047 1048 #ifdef MRT6DEBUG 1049 if (mrt6debug & DEBUG_FORWARD) 1050 log(LOG_DEBUG, "ip6_mforward: src %s, dst %s, ifindex %d\n", 1051 ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst), 1052 ifp->if_index); 1053 #endif 1054 1055 /* 1056 * Don't forward a packet with Hop limit of zero or one, 1057 * or a packet destined to a local-only group. 1058 */ 1059 if (ip6->ip6_hlim <= 1 || IN6_IS_ADDR_MC_NODELOCAL(&ip6->ip6_dst) || 1060 IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst)) 1061 return 0; 1062 ip6->ip6_hlim--; 1063 1064 /* 1065 * Source address check: do not forward packets with unspecified 1066 * source. It was discussed in July 2000, on ipngwg mailing list. 1067 * This is rather more serious than unicast cases, because some 1068 * MLD packets can be sent with the unspecified source address 1069 * (although such packets must normally set the hop limit field to 1). 1070 */ 1071 if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) { 1072 IP6_STATINC(IP6_STAT_CANTFORWARD); 1073 if (ip6_log_time + ip6_log_interval < time_second) { 1074 ip6_log_time = time_second; 1075 log(LOG_DEBUG, 1076 "cannot forward " 1077 "from %s to %s nxt %d received on %s\n", 1078 ip6_sprintf(&ip6->ip6_src), 1079 ip6_sprintf(&ip6->ip6_dst), 1080 ip6->ip6_nxt, 1081 m->m_pkthdr.rcvif ? 1082 if_name(m->m_pkthdr.rcvif) : "?"); 1083 } 1084 return 0; 1085 } 1086 1087 /* 1088 * Determine forwarding mifs from the forwarding cache table 1089 */ 1090 s = splsoftnet(); 1091 MF6CFIND(ip6->ip6_src, ip6->ip6_dst, rt); 1092 1093 /* Entry exists, so forward if necessary */ 1094 if (rt) { 1095 splx(s); 1096 return (ip6_mdq(m, ifp, rt)); 1097 } else { 1098 /* 1099 * If we don't have a route for packet's origin, 1100 * Make a copy of the packet & 1101 * send message to routing daemon 1102 */ 1103 1104 struct mbuf *mb0; 1105 struct rtdetq *rte; 1106 u_long hash; 1107 /* int i, npkts;*/ 1108 #ifdef UPCALL_TIMING 1109 struct timeval tp; 1110 1111 GET_TIME(tp); 1112 #endif /* UPCALL_TIMING */ 1113 1114 mrt6stat.mrt6s_no_route++; 1115 #ifdef MRT6DEBUG 1116 if (mrt6debug & (DEBUG_FORWARD | DEBUG_MFC)) 1117 log(LOG_DEBUG, "ip6_mforward: no rte s %s g %s\n", 1118 ip6_sprintf(&ip6->ip6_src), 1119 ip6_sprintf(&ip6->ip6_dst)); 1120 #endif 1121 1122 /* 1123 * Allocate mbufs early so that we don't do extra work if we 1124 * are just going to fail anyway. 1125 */ 1126 rte = (struct rtdetq *)malloc(sizeof(*rte), M_MRTABLE, 1127 M_NOWAIT); 1128 if (rte == NULL) { 1129 splx(s); 1130 return ENOBUFS; 1131 } 1132 mb0 = m_copy(m, 0, M_COPYALL); 1133 /* 1134 * Pullup packet header if needed before storing it, 1135 * as other references may modify it in the meantime. 1136 */ 1137 if (mb0 && 1138 (M_READONLY(mb0) || mb0->m_len < sizeof(struct ip6_hdr))) 1139 mb0 = m_pullup(mb0, sizeof(struct ip6_hdr)); 1140 if (mb0 == NULL) { 1141 free(rte, M_MRTABLE); 1142 splx(s); 1143 return ENOBUFS; 1144 } 1145 1146 /* is there an upcall waiting for this packet? */ 1147 hash = MF6CHASH(ip6->ip6_src, ip6->ip6_dst); 1148 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 1149 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, 1150 &rt->mf6c_origin.sin6_addr) && 1151 IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, 1152 &rt->mf6c_mcastgrp.sin6_addr) && 1153 (rt->mf6c_stall != NULL)) 1154 break; 1155 } 1156 1157 if (rt == NULL) { 1158 struct mrt6msg *im; 1159 struct omrt6msg *oim; 1160 1161 /* no upcall, so make a new entry */ 1162 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE, 1163 M_NOWAIT); 1164 if (rt == NULL) { 1165 free(rte, M_MRTABLE); 1166 m_freem(mb0); 1167 splx(s); 1168 return ENOBUFS; 1169 } 1170 /* 1171 * Make a copy of the header to send to the user 1172 * level process 1173 */ 1174 mm = m_copy(mb0, 0, sizeof(struct ip6_hdr)); 1175 1176 if (mm == NULL) { 1177 free(rte, M_MRTABLE); 1178 m_freem(mb0); 1179 free(rt, M_MRTABLE); 1180 splx(s); 1181 return ENOBUFS; 1182 } 1183 1184 /* 1185 * Send message to routing daemon 1186 */ 1187 sockaddr_in6_init(&sin6, &ip6->ip6_src, 0, 0, 0); 1188 1189 im = NULL; 1190 oim = NULL; 1191 switch (ip6_mrouter_ver) { 1192 case MRT6_OINIT: 1193 oim = mtod(mm, struct omrt6msg *); 1194 oim->im6_msgtype = MRT6MSG_NOCACHE; 1195 oim->im6_mbz = 0; 1196 break; 1197 case MRT6_INIT: 1198 im = mtod(mm, struct mrt6msg *); 1199 im->im6_msgtype = MRT6MSG_NOCACHE; 1200 im->im6_mbz = 0; 1201 break; 1202 default: 1203 free(rte, M_MRTABLE); 1204 m_freem(mb0); 1205 free(rt, M_MRTABLE); 1206 splx(s); 1207 return EINVAL; 1208 } 1209 1210 #ifdef MRT6DEBUG 1211 if (mrt6debug & DEBUG_FORWARD) 1212 log(LOG_DEBUG, 1213 "getting the iif info in the kernel\n"); 1214 #endif 1215 1216 for (mifp = mif6table, mifi = 0; 1217 mifi < nummifs && mifp->m6_ifp != ifp; 1218 mifp++, mifi++) 1219 ; 1220 1221 switch (ip6_mrouter_ver) { 1222 case MRT6_OINIT: 1223 oim->im6_mif = mifi; 1224 break; 1225 case MRT6_INIT: 1226 im->im6_mif = mifi; 1227 break; 1228 } 1229 1230 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1231 log(LOG_WARNING, "ip6_mforward: ip6_mrouter " 1232 "socket queue full\n"); 1233 mrt6stat.mrt6s_upq_sockfull++; 1234 free(rte, M_MRTABLE); 1235 m_freem(mb0); 1236 free(rt, M_MRTABLE); 1237 splx(s); 1238 return ENOBUFS; 1239 } 1240 1241 mrt6stat.mrt6s_upcalls++; 1242 1243 /* insert new entry at head of hash chain */ 1244 memset(rt, 0, sizeof(*rt)); 1245 sockaddr_in6_init(&rt->mf6c_origin, &ip6->ip6_src, 1246 0, 0, 0); 1247 sockaddr_in6_init(&rt->mf6c_mcastgrp, &ip6->ip6_dst, 1248 0, 0, 0); 1249 rt->mf6c_expire = UPCALL_EXPIRE; 1250 n6expire[hash]++; 1251 rt->mf6c_parent = MF6C_INCOMPLETE_PARENT; 1252 1253 /* link into table */ 1254 rt->mf6c_next = mf6ctable[hash]; 1255 mf6ctable[hash] = rt; 1256 /* Add this entry to the end of the queue */ 1257 rt->mf6c_stall = rte; 1258 } else { 1259 /* determine if q has overflowed */ 1260 struct rtdetq **p; 1261 int npkts = 0; 1262 1263 for (p = &rt->mf6c_stall; *p != NULL; p = &(*p)->next) 1264 if (++npkts > MAX_UPQ6) { 1265 mrt6stat.mrt6s_upq_ovflw++; 1266 free(rte, M_MRTABLE); 1267 m_freem(mb0); 1268 splx(s); 1269 return 0; 1270 } 1271 1272 /* Add this entry to the end of the queue */ 1273 *p = rte; 1274 } 1275 1276 rte->next = NULL; 1277 rte->m = mb0; 1278 rte->ifp = ifp; 1279 #ifdef UPCALL_TIMING 1280 rte->t = tp; 1281 #endif /* UPCALL_TIMING */ 1282 1283 splx(s); 1284 1285 return 0; 1286 } 1287 } 1288 1289 /* 1290 * Clean up cache entries if upcalls are not serviced 1291 * Call from the Slow Timeout mechanism, every 0.25 seconds. 1292 */ 1293 static void 1294 expire_upcalls(void *unused) 1295 { 1296 struct rtdetq *rte; 1297 struct mf6c *mfc, **nptr; 1298 int i; 1299 1300 mutex_enter(softnet_lock); 1301 KERNEL_LOCK(1, NULL); 1302 1303 for (i = 0; i < MF6CTBLSIZ; i++) { 1304 if (n6expire[i] == 0) 1305 continue; 1306 nptr = &mf6ctable[i]; 1307 while ((mfc = *nptr) != NULL) { 1308 rte = mfc->mf6c_stall; 1309 /* 1310 * Skip real cache entries 1311 * Make sure it wasn't marked to not expire (shouldn't happen) 1312 * If it expires now 1313 */ 1314 if (rte != NULL && 1315 mfc->mf6c_expire != 0 && 1316 --mfc->mf6c_expire == 0) { 1317 #ifdef MRT6DEBUG 1318 if (mrt6debug & DEBUG_EXPIRE) 1319 log(LOG_DEBUG, "expire_upcalls: expiring (%s %s)\n", 1320 ip6_sprintf(&mfc->mf6c_origin.sin6_addr), 1321 ip6_sprintf(&mfc->mf6c_mcastgrp.sin6_addr)); 1322 #endif 1323 /* 1324 * drop all the packets 1325 * free the mbuf with the pkt, if, timing info 1326 */ 1327 do { 1328 struct rtdetq *n = rte->next; 1329 m_freem(rte->m); 1330 free(rte, M_MRTABLE); 1331 rte = n; 1332 } while (rte != NULL); 1333 mrt6stat.mrt6s_cache_cleanups++; 1334 n6expire[i]--; 1335 1336 *nptr = mfc->mf6c_next; 1337 free(mfc, M_MRTABLE); 1338 } else { 1339 nptr = &mfc->mf6c_next; 1340 } 1341 } 1342 } 1343 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 1344 expire_upcalls, NULL); 1345 1346 KERNEL_UNLOCK_ONE(NULL); 1347 mutex_exit(softnet_lock); 1348 } 1349 1350 /* 1351 * Packet forwarding routine once entry in the cache is made 1352 */ 1353 static int 1354 ip6_mdq(struct mbuf *m, struct ifnet *ifp, struct mf6c *rt) 1355 { 1356 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 1357 mifi_t mifi, iif; 1358 struct mif6 *mifp; 1359 int plen = m->m_pkthdr.len; 1360 struct in6_addr src0, dst0; /* copies for local work */ 1361 u_int32_t iszone, idzone, oszone, odzone; 1362 int error = 0; 1363 1364 /* 1365 * Macro to send packet on mif. Since RSVP packets don't get counted on 1366 * input, they shouldn't get counted on output, so statistics keeping is 1367 * separate. 1368 */ 1369 1370 #define MC6_SEND(ip6, mifp, m) do { \ 1371 if ((mifp)->m6_flags & MIFF_REGISTER) \ 1372 register_send((ip6), (mifp), (m)); \ 1373 else \ 1374 phyint_send((ip6), (mifp), (m)); \ 1375 } while (/*CONSTCOND*/ 0) 1376 1377 /* 1378 * Don't forward if it didn't arrive from the parent mif 1379 * for its origin. 1380 */ 1381 mifi = rt->mf6c_parent; 1382 if ((mifi >= nummifs) || (mif6table[mifi].m6_ifp != ifp)) { 1383 /* came in the wrong interface */ 1384 #ifdef MRT6DEBUG 1385 if (mrt6debug & DEBUG_FORWARD) 1386 log(LOG_DEBUG, 1387 "wrong if: ifid %d mifi %d mififid %x\n", 1388 ifp->if_index, mifi, 1389 mif6table[mifi].m6_ifp ? 1390 mif6table[mifi].m6_ifp->if_index : -1); 1391 #endif 1392 mrt6stat.mrt6s_wrong_if++; 1393 rt->mf6c_wrong_if++; 1394 /* 1395 * If we are doing PIM processing, and we are forwarding 1396 * packets on this interface, send a message to the 1397 * routing daemon. 1398 */ 1399 /* have to make sure this is a valid mif */ 1400 if (mifi < nummifs && mif6table[mifi].m6_ifp) 1401 if (pim6 && (m->m_flags & M_LOOP) == 0) { 1402 /* 1403 * Check the M_LOOP flag to avoid an 1404 * unnecessary PIM assert. 1405 * XXX: M_LOOP is an ad-hoc hack... 1406 */ 1407 struct sockaddr_in6 sin6; 1408 1409 struct mbuf *mm; 1410 struct mrt6msg *im; 1411 struct omrt6msg *oim; 1412 1413 mm = m_copy(m, 0, sizeof(struct ip6_hdr)); 1414 if (mm && 1415 (M_READONLY(mm) || 1416 mm->m_len < sizeof(struct ip6_hdr))) 1417 mm = m_pullup(mm, sizeof(struct ip6_hdr)); 1418 if (mm == NULL) 1419 return ENOBUFS; 1420 1421 oim = NULL; 1422 im = NULL; 1423 switch (ip6_mrouter_ver) { 1424 case MRT6_OINIT: 1425 oim = mtod(mm, struct omrt6msg *); 1426 oim->im6_msgtype = MRT6MSG_WRONGMIF; 1427 oim->im6_mbz = 0; 1428 break; 1429 case MRT6_INIT: 1430 im = mtod(mm, struct mrt6msg *); 1431 im->im6_msgtype = MRT6MSG_WRONGMIF; 1432 im->im6_mbz = 0; 1433 break; 1434 default: 1435 m_freem(mm); 1436 return EINVAL; 1437 } 1438 1439 for (mifp = mif6table, iif = 0; 1440 iif < nummifs && mifp && 1441 mifp->m6_ifp != ifp; 1442 mifp++, iif++) 1443 ; 1444 1445 memset(&sin6, 0, sizeof(sin6)); 1446 sin6.sin6_len = sizeof(sin6); 1447 sin6.sin6_family = AF_INET6; 1448 switch (ip6_mrouter_ver) { 1449 case MRT6_OINIT: 1450 oim->im6_mif = iif; 1451 sin6.sin6_addr = oim->im6_src; 1452 break; 1453 case MRT6_INIT: 1454 im->im6_mif = iif; 1455 sin6.sin6_addr = im->im6_src; 1456 break; 1457 } 1458 1459 mrt6stat.mrt6s_upcalls++; 1460 1461 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1462 #ifdef MRT6DEBUG 1463 if (mrt6debug) 1464 log(LOG_WARNING, "mdq, ip6_mrouter socket queue full\n"); 1465 #endif 1466 ++mrt6stat.mrt6s_upq_sockfull; 1467 return ENOBUFS; 1468 } /* if socket Q full */ 1469 } /* if PIM */ 1470 return 0; 1471 } /* if wrong iif */ 1472 1473 /* If I sourced this packet, it counts as output, else it was input. */ 1474 if (m->m_pkthdr.rcvif == NULL) { 1475 /* XXX: is rcvif really NULL when output?? */ 1476 mif6table[mifi].m6_pkt_out++; 1477 mif6table[mifi].m6_bytes_out += plen; 1478 } else { 1479 mif6table[mifi].m6_pkt_in++; 1480 mif6table[mifi].m6_bytes_in += plen; 1481 } 1482 rt->mf6c_pkt_cnt++; 1483 rt->mf6c_byte_cnt += plen; 1484 1485 /* 1486 * For each mif, forward a copy of the packet if there are group 1487 * members downstream on the interface. 1488 */ 1489 src0 = ip6->ip6_src; 1490 dst0 = ip6->ip6_dst; 1491 if ((error = in6_setscope(&src0, ifp, &iszone)) != 0 || 1492 (error = in6_setscope(&dst0, ifp, &idzone)) != 0) { 1493 IP6_STATINC(IP6_STAT_BADSCOPE); 1494 return (error); 1495 } 1496 for (mifp = mif6table, mifi = 0; mifi < nummifs; mifp++, mifi++) 1497 if (IF_ISSET(mifi, &rt->mf6c_ifset)) { 1498 if (mif6table[mifi].m6_ifp == NULL) 1499 continue; 1500 /* 1501 * check if the outgoing packet is going to break 1502 * a scope boundary. 1503 * XXX: For packets through PIM register tunnel 1504 * interface, we believe the routing daemon. 1505 */ 1506 if ((mif6table[rt->mf6c_parent].m6_flags & 1507 MIFF_REGISTER) == 0 && 1508 (mif6table[mifi].m6_flags & MIFF_REGISTER) == 0) { 1509 if (in6_setscope(&src0, mif6table[mifi].m6_ifp, 1510 &oszone) || 1511 in6_setscope(&dst0, mif6table[mifi].m6_ifp, 1512 &odzone) || 1513 iszone != oszone || idzone != odzone) { 1514 IP6_STATINC(IP6_STAT_BADSCOPE); 1515 continue; 1516 } 1517 } 1518 1519 mifp->m6_pkt_out++; 1520 mifp->m6_bytes_out += plen; 1521 MC6_SEND(ip6, mifp, m); 1522 } 1523 return 0; 1524 } 1525 1526 static void 1527 phyint_send(struct ip6_hdr *ip6, struct mif6 *mifp, struct mbuf *m) 1528 { 1529 struct mbuf *mb_copy; 1530 struct ifnet *ifp = mifp->m6_ifp; 1531 int error __mrt6debugused = 0; 1532 int s; 1533 static struct route ro; 1534 struct in6_multi *in6m; 1535 struct sockaddr_in6 dst6; 1536 u_long linkmtu; 1537 1538 s = splsoftnet(); 1539 /* 1540 * Make a new reference to the packet; make sure that 1541 * the IPv6 header is actually copied, not just referenced, 1542 * so that ip6_output() only scribbles on the copy. 1543 */ 1544 mb_copy = m_copy(m, 0, M_COPYALL); 1545 if (mb_copy && 1546 (M_READONLY(mb_copy) || mb_copy->m_len < sizeof(struct ip6_hdr))) 1547 mb_copy = m_pullup(mb_copy, sizeof(struct ip6_hdr)); 1548 if (mb_copy == NULL) { 1549 splx(s); 1550 return; 1551 } 1552 /* set MCAST flag to the outgoing packet */ 1553 mb_copy->m_flags |= M_MCAST; 1554 1555 /* 1556 * If we sourced the packet, call ip6_output since we may divide 1557 * the packet into fragments when the packet is too big for the 1558 * outgoing interface. 1559 * Otherwise, we can simply send the packet to the interface 1560 * sending queue. 1561 */ 1562 if (m->m_pkthdr.rcvif == NULL) { 1563 struct ip6_moptions im6o; 1564 1565 im6o.im6o_multicast_ifp = ifp; 1566 /* XXX: ip6_output will override ip6->ip6_hlim */ 1567 im6o.im6o_multicast_hlim = ip6->ip6_hlim; 1568 im6o.im6o_multicast_loop = 1; 1569 error = ip6_output(mb_copy, NULL, &ro, IPV6_FORWARDING, 1570 &im6o, NULL, NULL); 1571 1572 #ifdef MRT6DEBUG 1573 if (mrt6debug & DEBUG_XMIT) 1574 log(LOG_DEBUG, "phyint_send on mif %td err %d\n", 1575 mifp - mif6table, error); 1576 #endif 1577 splx(s); 1578 return; 1579 } 1580 1581 /* 1582 * If we belong to the destination multicast group 1583 * on the outgoing interface, loop back a copy. 1584 */ 1585 /* 1586 * Does not have to check source info, as it's alreay covered by 1587 * ip6_input 1588 */ 1589 sockaddr_in6_init(&dst6, &ip6->ip6_dst, 0, 0, 0); 1590 1591 IN6_LOOKUP_MULTI(ip6->ip6_dst, ifp, in6m); 1592 if (in6m != NULL) { 1593 ip6_mloopback(ifp, m, 1594 satocsin6(rtcache_getdst(&ro))); 1595 } 1596 1597 /* 1598 * Put the packet into the sending queue of the outgoing interface 1599 * if it would fit in the MTU of the interface. 1600 */ 1601 linkmtu = IN6_LINKMTU(ifp); 1602 if (mb_copy->m_pkthdr.len <= linkmtu || linkmtu < IPV6_MMTU) { 1603 /* 1604 * We could call if_output directly here, but we use 1605 * nd6_output on purpose to see if IPv6 operation is allowed 1606 * on the interface. 1607 */ 1608 error = nd6_output(ifp, ifp, mb_copy, &dst6, NULL); 1609 #ifdef MRT6DEBUG 1610 if (mrt6debug & DEBUG_XMIT) 1611 log(LOG_DEBUG, "phyint_send on mif %td err %d\n", 1612 mifp - mif6table, error); 1613 #endif 1614 } else { 1615 /* 1616 * pMTU discovery is intentionally disabled by default, since 1617 * various router may notify pMTU in multicast, which can be 1618 * a DDoS to a router 1619 */ 1620 if (ip6_mcast_pmtu) 1621 icmp6_error(mb_copy, ICMP6_PACKET_TOO_BIG, 0, linkmtu); 1622 else { 1623 #ifdef MRT6DEBUG 1624 if (mrt6debug & DEBUG_XMIT) 1625 log(LOG_DEBUG, 1626 "phyint_send: packet too big on %s o %s g %s" 1627 " size %d(discarded)\n", 1628 if_name(ifp), 1629 ip6_sprintf(&ip6->ip6_src), 1630 ip6_sprintf(&ip6->ip6_dst), 1631 mb_copy->m_pkthdr.len); 1632 #endif /* MRT6DEBUG */ 1633 m_freem(mb_copy); /* simply discard the packet */ 1634 } 1635 } 1636 1637 splx(s); 1638 } 1639 1640 static int 1641 register_send(struct ip6_hdr *ip6, struct mif6 *mif, struct mbuf *m) 1642 { 1643 struct mbuf *mm; 1644 int i, len = m->m_pkthdr.len; 1645 struct sockaddr_in6 sin6; 1646 struct mrt6msg *im6; 1647 1648 #ifdef MRT6DEBUG 1649 if (mrt6debug) 1650 log(LOG_DEBUG, "** IPv6 register_send **\n src %s dst %s\n", 1651 ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst)); 1652 #endif 1653 PIM6_STATINC(PIM6_STAT_SND_REGISTERS); 1654 1655 /* Make a copy of the packet to send to the user level process */ 1656 MGETHDR(mm, M_DONTWAIT, MT_HEADER); 1657 if (mm == NULL) 1658 return ENOBUFS; 1659 mm->m_data += max_linkhdr; 1660 mm->m_len = sizeof(struct ip6_hdr); 1661 1662 if ((mm->m_next = m_copy(m, 0, M_COPYALL)) == NULL) { 1663 m_freem(mm); 1664 return ENOBUFS; 1665 } 1666 i = MHLEN - M_LEADINGSPACE(mm); 1667 if (i > len) 1668 i = len; 1669 mm = m_pullup(mm, i); 1670 if (mm == NULL) 1671 return ENOBUFS; 1672 /* TODO: check it! */ 1673 mm->m_pkthdr.len = len + sizeof(struct ip6_hdr); 1674 1675 /* 1676 * Send message to routing daemon 1677 */ 1678 sockaddr_in6_init(&sin6, &ip6->ip6_src, 0, 0, 0); 1679 1680 im6 = mtod(mm, struct mrt6msg *); 1681 im6->im6_msgtype = MRT6MSG_WHOLEPKT; 1682 im6->im6_mbz = 0; 1683 1684 im6->im6_mif = mif - mif6table; 1685 1686 /* iif info is not given for reg. encap.n */ 1687 mrt6stat.mrt6s_upcalls++; 1688 1689 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1690 #ifdef MRT6DEBUG 1691 if (mrt6debug) 1692 log(LOG_WARNING, 1693 "register_send: ip6_mrouter socket queue full\n"); 1694 #endif 1695 ++mrt6stat.mrt6s_upq_sockfull; 1696 return ENOBUFS; 1697 } 1698 return 0; 1699 } 1700 1701 /* 1702 * PIM sparse mode hook 1703 * Receives the pim control messages, and passes them up to the listening 1704 * socket, using rip6_input. 1705 * The only message processed is the REGISTER pim message; the pim header 1706 * is stripped off, and the inner packet is passed to register_mforward. 1707 */ 1708 int 1709 pim6_input(struct mbuf **mp, int *offp, int proto) 1710 { 1711 struct pim *pim; /* pointer to a pim struct */ 1712 struct ip6_hdr *ip6 __mrt6debugused; 1713 int pimlen; 1714 struct mbuf *m = *mp; 1715 int minlen; 1716 int off = *offp; 1717 1718 PIM6_STATINC(PIM6_STAT_RCV_TOTAL); 1719 1720 ip6 = mtod(m, struct ip6_hdr *); 1721 pimlen = m->m_pkthdr.len - *offp; 1722 1723 /* 1724 * Validate lengths 1725 */ 1726 if (pimlen < PIM_MINLEN) { 1727 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1728 #ifdef MRT6DEBUG 1729 if (mrt6debug & DEBUG_PIM) 1730 log(LOG_DEBUG,"pim6_input: PIM packet too short\n"); 1731 #endif 1732 m_freem(m); 1733 return (IPPROTO_DONE); 1734 } 1735 1736 /* 1737 * if the packet is at least as big as a REGISTER, go ahead 1738 * and grab the PIM REGISTER header size, to avoid another 1739 * possible m_pullup() later. 1740 * 1741 * PIM_MINLEN == pimhdr + u_int32 == 8 1742 * PIM6_REG_MINLEN == pimhdr + reghdr + eip6hdr == 4 + 4 + 40 1743 */ 1744 minlen = (pimlen >= PIM6_REG_MINLEN) ? PIM6_REG_MINLEN : PIM_MINLEN; 1745 1746 /* 1747 * Make sure that the IP6 and PIM headers in contiguous memory, and 1748 * possibly the PIM REGISTER header 1749 */ 1750 IP6_EXTHDR_GET(pim, struct pim *, m, off, minlen); 1751 if (pim == NULL) { 1752 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1753 return IPPROTO_DONE; 1754 } 1755 1756 /* PIM version check */ 1757 if (pim->pim_ver != PIM_VERSION) { 1758 PIM6_STATINC(PIM6_STAT_RCV_BADVERSION); 1759 #ifdef MRT6DEBUG 1760 log(LOG_ERR, 1761 "pim6_input: incorrect version %d, expecting %d\n", 1762 pim->pim_ver, PIM_VERSION); 1763 #endif 1764 m_freem(m); 1765 return (IPPROTO_DONE); 1766 } 1767 1768 #define PIM6_CHECKSUM 1769 #ifdef PIM6_CHECKSUM 1770 { 1771 int cksumlen; 1772 1773 /* 1774 * Validate checksum. 1775 * If PIM REGISTER, exclude the data packet 1776 */ 1777 if (pim->pim_type == PIM_REGISTER) 1778 cksumlen = PIM_MINLEN; 1779 else 1780 cksumlen = pimlen; 1781 1782 if (in6_cksum(m, IPPROTO_PIM, off, cksumlen)) { 1783 PIM6_STATINC(PIM6_STAT_RCV_BADSUM); 1784 #ifdef MRT6DEBUG 1785 if (mrt6debug & DEBUG_PIM) 1786 log(LOG_DEBUG, 1787 "pim6_input: invalid checksum\n"); 1788 #endif 1789 m_freem(m); 1790 return (IPPROTO_DONE); 1791 } 1792 } 1793 #endif /* PIM_CHECKSUM */ 1794 1795 if (pim->pim_type == PIM_REGISTER) { 1796 /* 1797 * since this is a REGISTER, we'll make a copy of the register 1798 * headers ip6+pim+u_int32_t+encap_ip6, to be passed up to the 1799 * routing daemon. 1800 */ 1801 static const struct sockaddr_in6 dst = { 1802 .sin6_len = sizeof(dst), 1803 .sin6_family = AF_INET6, 1804 }; 1805 1806 struct mbuf *mcp; 1807 struct ip6_hdr *eip6; 1808 u_int32_t *reghdr; 1809 1810 PIM6_STATINC(PIM6_STAT_RCV_REGISTERS); 1811 1812 if ((reg_mif_num >= nummifs) || (reg_mif_num == (mifi_t) -1)) { 1813 #ifdef MRT6DEBUG 1814 if (mrt6debug & DEBUG_PIM) 1815 log(LOG_DEBUG, 1816 "pim6_input: register mif not set: %d\n", 1817 reg_mif_num); 1818 #endif 1819 m_freem(m); 1820 return (IPPROTO_DONE); 1821 } 1822 1823 reghdr = (u_int32_t *)(pim + 1); 1824 1825 if ((ntohl(*reghdr) & PIM_NULL_REGISTER)) 1826 goto pim6_input_to_daemon; 1827 1828 /* 1829 * Validate length 1830 */ 1831 if (pimlen < PIM6_REG_MINLEN) { 1832 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1833 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1834 #ifdef MRT6DEBUG 1835 log(LOG_ERR, 1836 "pim6_input: register packet size too " 1837 "small %d from %s\n", 1838 pimlen, ip6_sprintf(&ip6->ip6_src)); 1839 #endif 1840 m_freem(m); 1841 return (IPPROTO_DONE); 1842 } 1843 1844 eip6 = (struct ip6_hdr *) (reghdr + 1); 1845 #ifdef MRT6DEBUG 1846 if (mrt6debug & DEBUG_PIM) 1847 log(LOG_DEBUG, 1848 "pim6_input[register], eip6: %s -> %s, " 1849 "eip6 plen %d\n", 1850 ip6_sprintf(&eip6->ip6_src), 1851 ip6_sprintf(&eip6->ip6_dst), 1852 ntohs(eip6->ip6_plen)); 1853 #endif 1854 1855 /* verify the version number of the inner packet */ 1856 if ((eip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) { 1857 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1858 #ifdef MRT6DEBUG 1859 log(LOG_DEBUG, "pim6_input: invalid IP version (%d) " 1860 "of the inner packet\n", 1861 (eip6->ip6_vfc & IPV6_VERSION)); 1862 #endif 1863 m_freem(m); 1864 return (IPPROTO_NONE); 1865 } 1866 1867 /* verify the inner packet is destined to a mcast group */ 1868 if (!IN6_IS_ADDR_MULTICAST(&eip6->ip6_dst)) { 1869 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1870 #ifdef MRT6DEBUG 1871 if (mrt6debug & DEBUG_PIM) 1872 log(LOG_DEBUG, 1873 "pim6_input: inner packet of register " 1874 "is not multicast %s\n", 1875 ip6_sprintf(&eip6->ip6_dst)); 1876 #endif 1877 m_freem(m); 1878 return (IPPROTO_DONE); 1879 } 1880 1881 /* 1882 * make a copy of the whole header to pass to the daemon later. 1883 */ 1884 mcp = m_copy(m, 0, off + PIM6_REG_MINLEN); 1885 if (mcp == NULL) { 1886 #ifdef MRT6DEBUG 1887 log(LOG_ERR, 1888 "pim6_input: pim register: " 1889 "could not copy register head\n"); 1890 #endif 1891 m_freem(m); 1892 return (IPPROTO_DONE); 1893 } 1894 1895 /* 1896 * forward the inner ip6 packet; point m_data at the inner ip6. 1897 */ 1898 m_adj(m, off + PIM_MINLEN); 1899 #ifdef MRT6DEBUG 1900 if (mrt6debug & DEBUG_PIM) { 1901 log(LOG_DEBUG, 1902 "pim6_input: forwarding decapsulated register: " 1903 "src %s, dst %s, mif %d\n", 1904 ip6_sprintf(&eip6->ip6_src), 1905 ip6_sprintf(&eip6->ip6_dst), 1906 reg_mif_num); 1907 } 1908 #endif 1909 1910 looutput(mif6table[reg_mif_num].m6_ifp, m, 1911 (struct sockaddr *)__UNCONST(&dst), NULL); 1912 1913 /* prepare the register head to send to the mrouting daemon */ 1914 m = mcp; 1915 } 1916 1917 /* 1918 * Pass the PIM message up to the daemon; if it is a register message 1919 * pass the 'head' only up to the daemon. This includes the 1920 * encapsulator ip6 header, pim header, register header and the 1921 * encapsulated ip6 header. 1922 */ 1923 pim6_input_to_daemon: 1924 rip6_input(&m, offp, proto); 1925 return (IPPROTO_DONE); 1926 } 1927 1928 static int 1929 sysctl_net_inet6_pim6_stats(SYSCTLFN_ARGS) 1930 { 1931 1932 return (NETSTAT_SYSCTL(pim6stat_percpu, PIM6_NSTATS)); 1933 } 1934 1935 static void 1936 sysctl_net_inet6_pim6_setup(struct sysctllog **clog) 1937 { 1938 1939 sysctl_createv(clog, 0, NULL, NULL, 1940 CTLFLAG_PERMANENT, 1941 CTLTYPE_NODE, "inet6", NULL, 1942 NULL, 0, NULL, 0, 1943 CTL_NET, PF_INET6, CTL_EOL); 1944 sysctl_createv(clog, 0, NULL, NULL, 1945 CTLFLAG_PERMANENT, 1946 CTLTYPE_NODE, "pim6", 1947 SYSCTL_DESCR("PIMv6 settings"), 1948 NULL, 0, NULL, 0, 1949 CTL_NET, PF_INET6, IPPROTO_PIM, CTL_EOL); 1950 1951 sysctl_createv(clog, 0, NULL, NULL, 1952 CTLFLAG_PERMANENT, 1953 CTLTYPE_STRUCT, "stats", 1954 SYSCTL_DESCR("PIMv6 statistics"), 1955 sysctl_net_inet6_pim6_stats, 0, NULL, 0, 1956 CTL_NET, PF_INET6, IPPROTO_PIM, PIM6CTL_STATS, 1957 CTL_EOL); 1958 } 1959