1 /* $NetBSD: ip6_mroute.c,v 1.112 2016/07/15 07:40:09 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 1.112 2016/07/15 07:40:09 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/protosw.h> 135 #include <sys/errno.h> 136 #include <sys/time.h> 137 #include <sys/kernel.h> 138 #include <sys/ioctl.h> 139 #include <sys/sysctl.h> 140 #include <sys/syslog.h> 141 142 #include <net/if.h> 143 #include <net/route.h> 144 #include <net/raw_cb.h> 145 #include <net/net_stats.h> 146 147 #include <netinet/in.h> 148 #include <netinet/in_var.h> 149 #include <netinet/icmp6.h> 150 151 #include <netinet/ip6.h> 152 #include <netinet6/ip6_var.h> 153 #include <netinet6/ip6_private.h> 154 #include <netinet6/ip6_mroute.h> 155 #include <netinet6/scope6_var.h> 156 #include <netinet6/pim6.h> 157 #include <netinet6/pim6_var.h> 158 #include <netinet6/nd6.h> 159 160 #include <net/net_osdep.h> 161 162 static int ip6_mdq(struct mbuf *, struct ifnet *, struct mf6c *); 163 static void phyint_send(struct ip6_hdr *, struct mif6 *, struct mbuf *); 164 165 static int set_pim6(int *); 166 static int socket_send(struct socket *, struct mbuf *, 167 struct sockaddr_in6 *); 168 static int register_send(struct ip6_hdr *, struct mif6 *, struct mbuf *); 169 170 /* 171 * Globals. All but ip6_mrouter, ip6_mrtproto and mrt6stat could be static, 172 * except for netstat or debugging purposes. 173 */ 174 struct socket *ip6_mrouter = NULL; 175 int ip6_mrouter_ver = 0; 176 int ip6_mrtproto = IPPROTO_PIM; /* for netstat only */ 177 struct mrt6stat mrt6stat; 178 179 #define NO_RTE_FOUND 0x1 180 #define RTE_FOUND 0x2 181 182 struct mf6c *mf6ctable[MF6CTBLSIZ]; 183 u_char n6expire[MF6CTBLSIZ]; 184 struct mif6 mif6table[MAXMIFS]; 185 #ifdef MRT6DEBUG 186 u_int mrt6debug = 0; /* debug level */ 187 #define DEBUG_MFC 0x02 188 #define DEBUG_FORWARD 0x04 189 #define DEBUG_EXPIRE 0x08 190 #define DEBUG_XMIT 0x10 191 #define DEBUG_REG 0x20 192 #define DEBUG_PIM 0x40 193 #define __mrt6debugused /* empty */ 194 #else 195 #define __mrt6debugused __unused 196 #endif 197 198 static void expire_upcalls(void *); 199 #define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */ 200 #define UPCALL_EXPIRE 6 /* number of timeouts */ 201 202 #ifdef INET 203 #ifdef MROUTING 204 extern struct socket *ip_mrouter; 205 #endif 206 #endif 207 208 /* 209 * 'Interfaces' associated with decapsulator (so we can tell 210 * packets that went through it from ones that get reflected 211 * by a broken gateway). These interfaces are never linked into 212 * the system ifnet list & no routes point to them. I.e., packets 213 * can't be sent this way. They only exist as a placeholder for 214 * multicast source verification. 215 */ 216 struct ifnet multicast_register_if6; 217 218 #define ENCAP_HOPS 64 219 220 /* 221 * Private variables. 222 */ 223 static mifi_t nummifs = 0; 224 static mifi_t reg_mif_num = (mifi_t)-1; 225 226 static percpu_t *pim6stat_percpu; 227 228 #define PIM6_STATINC(x) _NET_STATINC(pim6stat_percpu, x) 229 230 static int pim6; 231 232 /* 233 * Hash function for a source, group entry 234 */ 235 #define MF6CHASH(a, g) MF6CHASHMOD((a).s6_addr32[0] ^ (a).s6_addr32[1] ^ \ 236 (a).s6_addr32[2] ^ (a).s6_addr32[3] ^ \ 237 (g).s6_addr32[0] ^ (g).s6_addr32[1] ^ \ 238 (g).s6_addr32[2] ^ (g).s6_addr32[3]) 239 240 /* 241 * Find a route for a given origin IPv6 address and Multicast group address. 242 * Quality of service parameter to be added in the future!!! 243 */ 244 245 #define MF6CFIND(o, g, rt) do { \ 246 struct mf6c *_rt = mf6ctable[MF6CHASH(o,g)]; \ 247 rt = NULL; \ 248 mrt6stat.mrt6s_mfc_lookups++; \ 249 while (_rt) { \ 250 if (IN6_ARE_ADDR_EQUAL(&_rt->mf6c_origin.sin6_addr, &(o)) && \ 251 IN6_ARE_ADDR_EQUAL(&_rt->mf6c_mcastgrp.sin6_addr, &(g)) && \ 252 (_rt->mf6c_stall == NULL)) { \ 253 rt = _rt; \ 254 break; \ 255 } \ 256 _rt = _rt->mf6c_next; \ 257 } \ 258 if (rt == NULL) { \ 259 mrt6stat.mrt6s_mfc_misses++; \ 260 } \ 261 } while (/*CONSTCOND*/ 0) 262 263 /* 264 * Macros to compute elapsed time efficiently 265 * Borrowed from Van Jacobson's scheduling code 266 */ 267 #define TV_DELTA(a, b, delta) do { \ 268 int xxs; \ 269 \ 270 delta = (a).tv_usec - (b).tv_usec; \ 271 if ((xxs = (a).tv_sec - (b).tv_sec)) { \ 272 switch (xxs) { \ 273 case 2: \ 274 delta += 1000000; \ 275 /* FALLTHROUGH */ \ 276 case 1: \ 277 delta += 1000000; \ 278 break; \ 279 default: \ 280 delta += (1000000 * xxs); \ 281 } \ 282 } \ 283 } while (/*CONSTCOND*/ 0) 284 285 #define TV_LT(a, b) (((a).tv_usec < (b).tv_usec && \ 286 (a).tv_sec <= (b).tv_sec) || (a).tv_sec < (b).tv_sec) 287 288 #ifdef UPCALL_TIMING 289 #define UPCALL_MAX 50 290 u_long upcall_data[UPCALL_MAX + 1]; 291 static void collate(); 292 #endif /* UPCALL_TIMING */ 293 294 static int get_sg_cnt(struct sioc_sg_req6 *); 295 static int get_mif6_cnt(struct sioc_mif_req6 *); 296 static int ip6_mrouter_init(struct socket *, int, int); 297 static int add_m6if(struct mif6ctl *); 298 static int del_m6if(mifi_t *); 299 static int add_m6fc(struct mf6cctl *); 300 static int del_m6fc(struct mf6cctl *); 301 static void sysctl_net_inet6_pim6_setup(struct sysctllog **); 302 303 static callout_t expire_upcalls_ch; 304 305 void 306 pim6_init(void) 307 { 308 309 sysctl_net_inet6_pim6_setup(NULL); 310 pim6stat_percpu = percpu_alloc(sizeof(uint64_t) * PIM6_NSTATS); 311 } 312 313 /* 314 * Handle MRT setsockopt commands to modify the multicast routing tables. 315 */ 316 int 317 ip6_mrouter_set(struct socket *so, struct sockopt *sopt) 318 { 319 int error, optval; 320 struct mif6ctl mifc; 321 struct mf6cctl mfcc; 322 mifi_t mifi; 323 324 if (sopt->sopt_name != MRT6_INIT && so != ip6_mrouter) 325 return (EACCES); 326 327 error = 0; 328 329 switch (sopt->sopt_name) { 330 #ifdef MRT6_OINIT 331 case MRT6_OINIT: 332 #endif 333 case MRT6_INIT: 334 error = sockopt_getint(sopt, &optval); 335 if (error) 336 break; 337 return (ip6_mrouter_init(so, optval, sopt->sopt_name)); 338 case MRT6_DONE: 339 return (ip6_mrouter_done()); 340 case MRT6_ADD_MIF: 341 error = sockopt_get(sopt, &mifc, sizeof(mifc)); 342 if (error) 343 break; 344 return (add_m6if(&mifc)); 345 case MRT6_DEL_MIF: 346 error = sockopt_get(sopt, &mifi, sizeof(mifi)); 347 if (error) 348 break; 349 return (del_m6if(&mifi)); 350 case MRT6_ADD_MFC: 351 error = sockopt_get(sopt, &mfcc, sizeof(mfcc)); 352 if (error) 353 break; 354 return (add_m6fc(&mfcc)); 355 case MRT6_DEL_MFC: 356 error = sockopt_get(sopt, &mfcc, sizeof(mfcc)); 357 if (error) 358 break; 359 return (del_m6fc(&mfcc)); 360 case MRT6_PIM: 361 error = sockopt_getint(sopt, &optval); 362 if (error) 363 break; 364 return (set_pim6(&optval)); 365 default: 366 error = EOPNOTSUPP; 367 } 368 369 return (error); 370 } 371 372 /* 373 * Handle MRT getsockopt commands 374 */ 375 int 376 ip6_mrouter_get(struct socket *so, struct sockopt *sopt) 377 { 378 int error; 379 380 if (so != ip6_mrouter) return EACCES; 381 382 error = 0; 383 384 switch (sopt->sopt_name) { 385 case MRT6_PIM: 386 error = sockopt_set(sopt, &pim6, sizeof(pim6)); 387 break; 388 default: 389 error = EOPNOTSUPP; 390 break; 391 } 392 393 return (error); 394 } 395 396 /* 397 * Handle ioctl commands to obtain information from the cache 398 */ 399 int 400 mrt6_ioctl(u_long cmd, void *data) 401 { 402 403 switch (cmd) { 404 case SIOCGETSGCNT_IN6: 405 return (get_sg_cnt((struct sioc_sg_req6 *)data)); 406 case SIOCGETMIFCNT_IN6: 407 return (get_mif6_cnt((struct sioc_mif_req6 *)data)); 408 default: 409 return (EINVAL); 410 } 411 } 412 413 /* 414 * returns the packet, byte, rpf-failure count for the source group provided 415 */ 416 static int 417 get_sg_cnt(struct sioc_sg_req6 *req) 418 { 419 struct mf6c *rt; 420 int s; 421 422 s = splsoftnet(); 423 MF6CFIND(req->src.sin6_addr, req->grp.sin6_addr, rt); 424 splx(s); 425 if (rt != NULL) { 426 req->pktcnt = rt->mf6c_pkt_cnt; 427 req->bytecnt = rt->mf6c_byte_cnt; 428 req->wrong_if = rt->mf6c_wrong_if; 429 } else 430 return (ESRCH); 431 #if 0 432 req->pktcnt = req->bytecnt = req->wrong_if = 0xffffffff; 433 #endif 434 435 return 0; 436 } 437 438 /* 439 * returns the input and output packet and byte counts on the mif provided 440 */ 441 static int 442 get_mif6_cnt(struct sioc_mif_req6 *req) 443 { 444 mifi_t mifi = req->mifi; 445 446 if (mifi >= nummifs) 447 return EINVAL; 448 449 req->icount = mif6table[mifi].m6_pkt_in; 450 req->ocount = mif6table[mifi].m6_pkt_out; 451 req->ibytes = mif6table[mifi].m6_bytes_in; 452 req->obytes = mif6table[mifi].m6_bytes_out; 453 454 return 0; 455 } 456 457 static int 458 set_pim6(int *i) 459 { 460 if ((*i != 1) && (*i != 0)) 461 return EINVAL; 462 463 pim6 = *i; 464 465 return 0; 466 } 467 468 /* 469 * Enable multicast routing 470 */ 471 static int 472 ip6_mrouter_init(struct socket *so, int v, int cmd) 473 { 474 #ifdef MRT6DEBUG 475 if (mrt6debug) 476 log(LOG_DEBUG, 477 "ip6_mrouter_init: so_type = %d, pr_protocol = %d\n", 478 so->so_type, so->so_proto->pr_protocol); 479 #endif 480 481 if (so->so_type != SOCK_RAW || 482 so->so_proto->pr_protocol != IPPROTO_ICMPV6) 483 return (EOPNOTSUPP); 484 485 if (v != 1) 486 return (ENOPROTOOPT); 487 488 if (ip6_mrouter != NULL) 489 return (EADDRINUSE); 490 491 ip6_mrouter = so; 492 ip6_mrouter_ver = cmd; 493 494 memset((void *)mf6ctable, 0, sizeof(mf6ctable)); 495 memset((void *)n6expire, 0, sizeof(n6expire)); 496 497 pim6 = 0;/* used for stubbing out/in pim stuff */ 498 499 callout_init(&expire_upcalls_ch, CALLOUT_MPSAFE); 500 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 501 expire_upcalls, NULL); 502 503 #ifdef MRT6DEBUG 504 if (mrt6debug) 505 log(LOG_DEBUG, "ip6_mrouter_init\n"); 506 #endif 507 508 return 0; 509 } 510 511 /* 512 * Disable multicast routing 513 */ 514 int 515 ip6_mrouter_done(void) 516 { 517 mifi_t mifi; 518 int i; 519 struct ifnet *ifp; 520 struct sockaddr_in6 sin6; 521 struct mf6c *rt; 522 struct rtdetq *rte; 523 int s; 524 525 s = splsoftnet(); 526 527 /* 528 * For each phyint in use, disable promiscuous reception of all IPv6 529 * multicasts. 530 */ 531 #ifdef INET 532 #ifdef MROUTING 533 /* 534 * If there is still IPv4 multicast routing daemon, 535 * we remain interfaces to receive all muliticasted packets. 536 * XXX: there may be an interface in which the IPv4 multicast 537 * daemon is not interested... 538 */ 539 if (!ip_mrouter) 540 #endif 541 #endif 542 { 543 for (mifi = 0; mifi < nummifs; mifi++) { 544 if (mif6table[mifi].m6_ifp && 545 !(mif6table[mifi].m6_flags & MIFF_REGISTER)) { 546 sin6.sin6_family = AF_INET6; 547 sin6.sin6_addr = in6addr_any; 548 ifp = mif6table[mifi].m6_ifp; 549 if_mcast_op(ifp, SIOCDELMULTI, 550 sin6tocsa(&sin6)); 551 } 552 } 553 } 554 #ifdef notyet 555 memset((void *)qtable, 0, sizeof(qtable)); 556 memset((void *)tbftable, 0, sizeof(tbftable)); 557 #endif 558 memset((void *)mif6table, 0, sizeof(mif6table)); 559 nummifs = 0; 560 561 pim6 = 0; /* used to stub out/in pim specific code */ 562 563 callout_stop(&expire_upcalls_ch); 564 565 /* 566 * Free all multicast forwarding cache entries. 567 */ 568 for (i = 0; i < MF6CTBLSIZ; i++) { 569 rt = mf6ctable[i]; 570 while (rt) { 571 struct mf6c *frt; 572 573 for (rte = rt->mf6c_stall; rte != NULL; ) { 574 struct rtdetq *n = rte->next; 575 576 m_freem(rte->m); 577 free(rte, M_MRTABLE); 578 rte = n; 579 } 580 frt = rt; 581 rt = rt->mf6c_next; 582 free(frt, M_MRTABLE); 583 } 584 } 585 586 memset((void *)mf6ctable, 0, sizeof(mf6ctable)); 587 588 /* 589 * Reset register interface 590 */ 591 if (reg_mif_num != (mifi_t)-1) { 592 if_detach(&multicast_register_if6); 593 reg_mif_num = (mifi_t)-1; 594 } 595 596 ip6_mrouter = NULL; 597 ip6_mrouter_ver = 0; 598 599 splx(s); 600 601 #ifdef MRT6DEBUG 602 if (mrt6debug) 603 log(LOG_DEBUG, "ip6_mrouter_done\n"); 604 #endif 605 606 return 0; 607 } 608 609 void 610 ip6_mrouter_detach(struct ifnet *ifp) 611 { 612 struct rtdetq *rte; 613 struct mf6c *mfc; 614 mifi_t mifi; 615 int i; 616 617 if (ip6_mrouter == NULL) 618 return; 619 620 /* 621 * Delete a mif which points to ifp. 622 */ 623 for (mifi = 0; mifi < nummifs; mifi++) 624 if (mif6table[mifi].m6_ifp == ifp) 625 del_m6if(&mifi); 626 627 /* 628 * Clear rte->ifp of cache entries received on ifp. 629 */ 630 for (i = 0; i < MF6CTBLSIZ; i++) { 631 if (n6expire[i] == 0) 632 continue; 633 634 for (mfc = mf6ctable[i]; mfc != NULL; mfc = mfc->mf6c_next) { 635 for (rte = mfc->mf6c_stall; rte != NULL; rte = rte->next) { 636 if (rte->ifp == ifp) 637 rte->ifp = NULL; 638 } 639 } 640 } 641 } 642 643 644 /* 645 * Add a mif to the mif table 646 */ 647 static int 648 add_m6if(struct mif6ctl *mifcp) 649 { 650 struct mif6 *mifp; 651 struct ifnet *ifp; 652 struct sockaddr_in6 sin6; 653 int error, s; 654 #ifdef notyet 655 struct tbf *m_tbf = tbftable + mifcp->mif6c_mifi; 656 #endif 657 658 if (mifcp->mif6c_mifi >= MAXMIFS) 659 return EINVAL; 660 mifp = mif6table + mifcp->mif6c_mifi; 661 if (mifp->m6_ifp) 662 return EADDRINUSE; /* XXX: is it appropriate? */ 663 if (!mifcp->mif6c_pifi || (ifp = if_byindex(mifcp->mif6c_pifi)) == NULL) 664 return ENXIO; 665 666 if (mifcp->mif6c_flags & MIFF_REGISTER) { 667 ifp = &multicast_register_if6; 668 669 if (reg_mif_num == (mifi_t)-1) { 670 strlcpy(ifp->if_xname, "register_mif", 671 sizeof(ifp->if_xname)); 672 ifp->if_flags |= IFF_LOOPBACK; 673 ifp->if_index = mifcp->mif6c_mifi; 674 reg_mif_num = mifcp->mif6c_mifi; 675 if_attach(ifp); 676 } 677 678 } /* if REGISTER */ 679 else { 680 /* Make sure the interface supports multicast */ 681 if ((ifp->if_flags & IFF_MULTICAST) == 0) 682 return EOPNOTSUPP; 683 684 s = splsoftnet(); 685 /* 686 * Enable promiscuous reception of all IPv6 multicasts 687 * from the interface. 688 */ 689 sin6.sin6_family = AF_INET6; 690 sin6.sin6_addr = in6addr_any; 691 error = if_mcast_op(ifp, SIOCADDMULTI, sin6tosa(&sin6)); 692 splx(s); 693 if (error) 694 return error; 695 } 696 697 s = splsoftnet(); 698 mifp->m6_flags = mifcp->mif6c_flags; 699 mifp->m6_ifp = ifp; 700 #ifdef notyet 701 /* scaling up here allows division by 1024 in critical code */ 702 mifp->m6_rate_limit = mifcp->mif6c_rate_limit * 1024 / 1000; 703 #endif 704 /* initialize per mif pkt counters */ 705 mifp->m6_pkt_in = 0; 706 mifp->m6_pkt_out = 0; 707 mifp->m6_bytes_in = 0; 708 mifp->m6_bytes_out = 0; 709 splx(s); 710 711 /* Adjust nummifs up if the mifi is higher than nummifs */ 712 if (nummifs <= mifcp->mif6c_mifi) 713 nummifs = mifcp->mif6c_mifi + 1; 714 715 #ifdef MRT6DEBUG 716 if (mrt6debug) 717 log(LOG_DEBUG, 718 "add_mif #%d, phyint %s\n", 719 mifcp->mif6c_mifi, ifp->if_xname); 720 #endif 721 722 return 0; 723 } 724 725 /* 726 * Delete a mif from the mif table 727 */ 728 static int 729 del_m6if(mifi_t *mifip) 730 { 731 struct mif6 *mifp = mif6table + *mifip; 732 mifi_t mifi; 733 struct ifnet *ifp; 734 struct sockaddr_in6 sin6; 735 int s; 736 737 if (*mifip >= nummifs) 738 return EINVAL; 739 if (mifp->m6_ifp == NULL) 740 return EINVAL; 741 742 s = splsoftnet(); 743 744 if (!(mifp->m6_flags & MIFF_REGISTER)) { 745 /* 746 * XXX: what if there is yet IPv4 multicast daemon 747 * using the interface? 748 */ 749 ifp = mifp->m6_ifp; 750 751 sin6.sin6_family = AF_INET6; 752 sin6.sin6_addr = in6addr_any; 753 if_mcast_op(ifp, SIOCDELMULTI, sin6tosa(&sin6)); 754 } else { 755 if (reg_mif_num != (mifi_t)-1) { 756 if_detach(&multicast_register_if6); 757 reg_mif_num = (mifi_t)-1; 758 } 759 } 760 761 #ifdef notyet 762 memset((void *)qtable[*mifip], 0, sizeof(qtable[*mifip])); 763 memset((void *)mifp->m6_tbf, 0, sizeof(*(mifp->m6_tbf))); 764 #endif 765 memset((void *)mifp, 0, sizeof (*mifp)); 766 767 /* Adjust nummifs down */ 768 for (mifi = nummifs; mifi > 0; mifi--) 769 if (mif6table[mifi - 1].m6_ifp) 770 break; 771 nummifs = mifi; 772 773 splx(s); 774 775 #ifdef MRT6DEBUG 776 if (mrt6debug) 777 log(LOG_DEBUG, "del_m6if %d, nummifs %d\n", *mifip, nummifs); 778 #endif 779 780 return 0; 781 } 782 783 /* 784 * Add an mfc entry 785 */ 786 static int 787 add_m6fc(struct mf6cctl *mfccp) 788 { 789 struct mf6c *rt; 790 u_long hash; 791 struct rtdetq *rte; 792 u_short nstl; 793 int s; 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 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 804 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 805 mfccp->mf6cc_parent); 806 #endif 807 808 s = splsoftnet(); 809 rt->mf6c_parent = mfccp->mf6cc_parent; 810 rt->mf6c_ifset = mfccp->mf6cc_ifset; 811 splx(s); 812 return 0; 813 } 814 815 /* 816 * Find the entry for which the upcall was made and update 817 */ 818 s = splsoftnet(); 819 hash = MF6CHASH(mfccp->mf6cc_origin.sin6_addr, 820 mfccp->mf6cc_mcastgrp.sin6_addr); 821 for (rt = mf6ctable[hash], nstl = 0; rt; rt = rt->mf6c_next) { 822 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 823 &mfccp->mf6cc_origin.sin6_addr) && 824 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 825 &mfccp->mf6cc_mcastgrp.sin6_addr) && 826 (rt->mf6c_stall != NULL)) { 827 828 if (nstl++) 829 log(LOG_ERR, 830 "add_m6fc: %s o %s g %s p %x dbx %p\n", 831 "multiple kernel entries", 832 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 833 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 834 mfccp->mf6cc_parent, rt->mf6c_stall); 835 836 #ifdef MRT6DEBUG 837 if (mrt6debug & DEBUG_MFC) 838 log(LOG_DEBUG, 839 "add_m6fc o %s g %s p %x dbg %p\n", 840 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 841 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 842 mfccp->mf6cc_parent, rt->mf6c_stall); 843 #endif 844 845 rt->mf6c_origin = mfccp->mf6cc_origin; 846 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 847 rt->mf6c_parent = mfccp->mf6cc_parent; 848 rt->mf6c_ifset = mfccp->mf6cc_ifset; 849 /* initialize pkt counters per src-grp */ 850 rt->mf6c_pkt_cnt = 0; 851 rt->mf6c_byte_cnt = 0; 852 rt->mf6c_wrong_if = 0; 853 854 rt->mf6c_expire = 0; /* Don't clean this guy up */ 855 n6expire[hash]--; 856 857 /* free packets Qed at the end of this entry */ 858 for (rte = rt->mf6c_stall; rte != NULL; ) { 859 struct rtdetq *n = rte->next; 860 if (rte->ifp) { 861 ip6_mdq(rte->m, rte->ifp, rt); 862 } 863 m_freem(rte->m); 864 #ifdef UPCALL_TIMING 865 collate(&(rte->t)); 866 #endif /* UPCALL_TIMING */ 867 free(rte, M_MRTABLE); 868 rte = n; 869 } 870 rt->mf6c_stall = NULL; 871 } 872 } 873 874 /* 875 * It is possible that an entry is being inserted without an upcall 876 */ 877 if (nstl == 0) { 878 #ifdef MRT6DEBUG 879 if (mrt6debug & DEBUG_MFC) 880 log(LOG_DEBUG, 881 "add_mfc no upcall h %ld o %s g %s p %x\n", 882 hash, 883 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr), 884 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr), 885 mfccp->mf6cc_parent); 886 #endif 887 888 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 889 890 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, 891 &mfccp->mf6cc_origin.sin6_addr)&& 892 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, 893 &mfccp->mf6cc_mcastgrp.sin6_addr)) { 894 895 rt->mf6c_origin = mfccp->mf6cc_origin; 896 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 897 rt->mf6c_parent = mfccp->mf6cc_parent; 898 rt->mf6c_ifset = mfccp->mf6cc_ifset; 899 /* initialize pkt counters per src-grp */ 900 rt->mf6c_pkt_cnt = 0; 901 rt->mf6c_byte_cnt = 0; 902 rt->mf6c_wrong_if = 0; 903 904 if (rt->mf6c_expire) 905 n6expire[hash]--; 906 rt->mf6c_expire = 0; 907 } 908 } 909 if (rt == NULL) { 910 /* no upcall, so make a new entry */ 911 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE, 912 M_NOWAIT); 913 if (rt == NULL) { 914 splx(s); 915 return ENOBUFS; 916 } 917 918 /* insert new entry at head of hash chain */ 919 rt->mf6c_origin = mfccp->mf6cc_origin; 920 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; 921 rt->mf6c_parent = mfccp->mf6cc_parent; 922 rt->mf6c_ifset = mfccp->mf6cc_ifset; 923 /* initialize pkt counters per src-grp */ 924 rt->mf6c_pkt_cnt = 0; 925 rt->mf6c_byte_cnt = 0; 926 rt->mf6c_wrong_if = 0; 927 rt->mf6c_expire = 0; 928 rt->mf6c_stall = NULL; 929 930 /* link into table */ 931 rt->mf6c_next = mf6ctable[hash]; 932 mf6ctable[hash] = rt; 933 } 934 } 935 splx(s); 936 return 0; 937 } 938 939 #ifdef UPCALL_TIMING 940 /* 941 * collect delay statistics on the upcalls 942 */ 943 static void 944 collate(struct timeval *t) 945 { 946 u_long d; 947 struct timeval tp; 948 u_long delta; 949 950 GET_TIME(tp); 951 952 if (TV_LT(*t, tp)) 953 { 954 TV_DELTA(tp, *t, delta); 955 956 d = delta >> 10; 957 if (d > UPCALL_MAX) 958 d = UPCALL_MAX; 959 960 ++upcall_data[d]; 961 } 962 } 963 #endif /* UPCALL_TIMING */ 964 965 /* 966 * Delete an mfc entry 967 */ 968 static int 969 del_m6fc(struct mf6cctl *mfccp) 970 { 971 struct sockaddr_in6 origin; 972 struct sockaddr_in6 mcastgrp; 973 struct mf6c *rt; 974 struct mf6c **nptr; 975 u_long hash; 976 int s; 977 978 origin = mfccp->mf6cc_origin; 979 mcastgrp = mfccp->mf6cc_mcastgrp; 980 hash = MF6CHASH(origin.sin6_addr, mcastgrp.sin6_addr); 981 982 #ifdef MRT6DEBUG 983 if (mrt6debug & DEBUG_MFC) 984 log(LOG_DEBUG,"del_m6fc orig %s mcastgrp %s\n", 985 ip6_sprintf(&origin.sin6_addr), 986 ip6_sprintf(&mcastgrp.sin6_addr)); 987 #endif 988 989 s = splsoftnet(); 990 991 nptr = &mf6ctable[hash]; 992 while ((rt = *nptr) != NULL) { 993 if (IN6_ARE_ADDR_EQUAL(&origin.sin6_addr, 994 &rt->mf6c_origin.sin6_addr) && 995 IN6_ARE_ADDR_EQUAL(&mcastgrp.sin6_addr, 996 &rt->mf6c_mcastgrp.sin6_addr) && 997 rt->mf6c_stall == NULL) 998 break; 999 1000 nptr = &rt->mf6c_next; 1001 } 1002 if (rt == NULL) { 1003 splx(s); 1004 return EADDRNOTAVAIL; 1005 } 1006 1007 *nptr = rt->mf6c_next; 1008 free(rt, M_MRTABLE); 1009 1010 splx(s); 1011 1012 return 0; 1013 } 1014 1015 static int 1016 socket_send(struct socket *s, struct mbuf *mm, struct sockaddr_in6 *src) 1017 { 1018 if (s) { 1019 if (sbappendaddr(&s->so_rcv, sin6tosa(src), mm, NULL) != 0) { 1020 sorwakeup(s); 1021 return 0; 1022 } 1023 } 1024 m_freem(mm); 1025 return -1; 1026 } 1027 1028 /* 1029 * IPv6 multicast forwarding function. This function assumes that the packet 1030 * pointed to by "ip6" has arrived on (or is about to be sent to) the interface 1031 * pointed to by "ifp", and the packet is to be relayed to other networks 1032 * that have members of the packet's destination IPv6 multicast group. 1033 * 1034 * The packet is returned unscathed to the caller, unless it is 1035 * erroneous, in which case a non-zero return value tells the caller to 1036 * discard it. 1037 */ 1038 1039 int 1040 ip6_mforward(struct ip6_hdr *ip6, struct ifnet *ifp, struct mbuf *m) 1041 { 1042 struct mf6c *rt; 1043 struct mif6 *mifp; 1044 struct mbuf *mm; 1045 int s; 1046 mifi_t mifi; 1047 struct sockaddr_in6 sin6; 1048 1049 #ifdef MRT6DEBUG 1050 if (mrt6debug & DEBUG_FORWARD) 1051 log(LOG_DEBUG, "ip6_mforward: src %s, dst %s, ifindex %d\n", 1052 ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst), 1053 ifp->if_index); 1054 #endif 1055 1056 /* 1057 * Don't forward a packet with Hop limit of zero or one, 1058 * or a packet destined to a local-only group. 1059 */ 1060 if (ip6->ip6_hlim <= 1 || IN6_IS_ADDR_MC_NODELOCAL(&ip6->ip6_dst) || 1061 IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst)) 1062 return 0; 1063 ip6->ip6_hlim--; 1064 1065 /* 1066 * Source address check: do not forward packets with unspecified 1067 * source. It was discussed in July 2000, on ipngwg mailing list. 1068 * This is rather more serious than unicast cases, because some 1069 * MLD packets can be sent with the unspecified source address 1070 * (although such packets must normally set the hop limit field to 1). 1071 */ 1072 if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) { 1073 IP6_STATINC(IP6_STAT_CANTFORWARD); 1074 if (ip6_log_time + ip6_log_interval < time_uptime) { 1075 ip6_log_time = time_uptime; 1076 log(LOG_DEBUG, 1077 "cannot forward " 1078 "from %s to %s nxt %d received on %s\n", 1079 ip6_sprintf(&ip6->ip6_src), 1080 ip6_sprintf(&ip6->ip6_dst), 1081 ip6->ip6_nxt, 1082 m->m_pkthdr.rcvif_index ? 1083 if_name(m_get_rcvif_NOMPSAFE(m)) : "?"); 1084 } 1085 return 0; 1086 } 1087 1088 /* 1089 * Determine forwarding mifs from the forwarding cache table 1090 */ 1091 s = splsoftnet(); 1092 MF6CFIND(ip6->ip6_src, ip6->ip6_dst, rt); 1093 1094 /* Entry exists, so forward if necessary */ 1095 if (rt) { 1096 splx(s); 1097 return (ip6_mdq(m, ifp, rt)); 1098 } else { 1099 /* 1100 * If we don't have a route for packet's origin, 1101 * Make a copy of the packet & 1102 * send message to routing daemon 1103 */ 1104 1105 struct mbuf *mb0; 1106 struct rtdetq *rte; 1107 u_long hash; 1108 /* int i, npkts;*/ 1109 #ifdef UPCALL_TIMING 1110 struct timeval tp; 1111 1112 GET_TIME(tp); 1113 #endif /* UPCALL_TIMING */ 1114 1115 mrt6stat.mrt6s_no_route++; 1116 #ifdef MRT6DEBUG 1117 if (mrt6debug & (DEBUG_FORWARD | DEBUG_MFC)) 1118 log(LOG_DEBUG, "ip6_mforward: no rte s %s g %s\n", 1119 ip6_sprintf(&ip6->ip6_src), 1120 ip6_sprintf(&ip6->ip6_dst)); 1121 #endif 1122 1123 /* 1124 * Allocate mbufs early so that we don't do extra work if we 1125 * are just going to fail anyway. 1126 */ 1127 rte = (struct rtdetq *)malloc(sizeof(*rte), M_MRTABLE, 1128 M_NOWAIT); 1129 if (rte == NULL) { 1130 splx(s); 1131 return ENOBUFS; 1132 } 1133 mb0 = m_copy(m, 0, M_COPYALL); 1134 /* 1135 * Pullup packet header if needed before storing it, 1136 * as other references may modify it in the meantime. 1137 */ 1138 if (mb0 && 1139 (M_READONLY(mb0) || mb0->m_len < sizeof(struct ip6_hdr))) 1140 mb0 = m_pullup(mb0, sizeof(struct ip6_hdr)); 1141 if (mb0 == NULL) { 1142 free(rte, M_MRTABLE); 1143 splx(s); 1144 return ENOBUFS; 1145 } 1146 1147 /* is there an upcall waiting for this packet? */ 1148 hash = MF6CHASH(ip6->ip6_src, ip6->ip6_dst); 1149 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { 1150 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, 1151 &rt->mf6c_origin.sin6_addr) && 1152 IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, 1153 &rt->mf6c_mcastgrp.sin6_addr) && 1154 (rt->mf6c_stall != NULL)) 1155 break; 1156 } 1157 1158 if (rt == NULL) { 1159 struct mrt6msg *im; 1160 struct omrt6msg *oim; 1161 1162 /* no upcall, so make a new entry */ 1163 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE, 1164 M_NOWAIT); 1165 if (rt == NULL) { 1166 free(rte, M_MRTABLE); 1167 m_freem(mb0); 1168 splx(s); 1169 return ENOBUFS; 1170 } 1171 /* 1172 * Make a copy of the header to send to the user 1173 * level process 1174 */ 1175 mm = m_copy(mb0, 0, sizeof(struct ip6_hdr)); 1176 1177 if (mm == NULL) { 1178 free(rte, M_MRTABLE); 1179 m_freem(mb0); 1180 free(rt, M_MRTABLE); 1181 splx(s); 1182 return ENOBUFS; 1183 } 1184 1185 /* 1186 * Send message to routing daemon 1187 */ 1188 sockaddr_in6_init(&sin6, &ip6->ip6_src, 0, 0, 0); 1189 1190 im = NULL; 1191 oim = NULL; 1192 switch (ip6_mrouter_ver) { 1193 case MRT6_OINIT: 1194 oim = mtod(mm, struct omrt6msg *); 1195 oim->im6_msgtype = MRT6MSG_NOCACHE; 1196 oim->im6_mbz = 0; 1197 break; 1198 case MRT6_INIT: 1199 im = mtod(mm, struct mrt6msg *); 1200 im->im6_msgtype = MRT6MSG_NOCACHE; 1201 im->im6_mbz = 0; 1202 break; 1203 default: 1204 free(rte, M_MRTABLE); 1205 m_freem(mb0); 1206 free(rt, M_MRTABLE); 1207 splx(s); 1208 return EINVAL; 1209 } 1210 1211 #ifdef MRT6DEBUG 1212 if (mrt6debug & DEBUG_FORWARD) 1213 log(LOG_DEBUG, 1214 "getting the iif info in the kernel\n"); 1215 #endif 1216 1217 for (mifp = mif6table, mifi = 0; 1218 mifi < nummifs && mifp->m6_ifp != ifp; 1219 mifp++, mifi++) 1220 ; 1221 1222 switch (ip6_mrouter_ver) { 1223 case MRT6_OINIT: 1224 oim->im6_mif = mifi; 1225 break; 1226 case MRT6_INIT: 1227 im->im6_mif = mifi; 1228 break; 1229 } 1230 1231 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1232 log(LOG_WARNING, "ip6_mforward: ip6_mrouter " 1233 "socket queue full\n"); 1234 mrt6stat.mrt6s_upq_sockfull++; 1235 free(rte, M_MRTABLE); 1236 m_freem(mb0); 1237 free(rt, M_MRTABLE); 1238 splx(s); 1239 return ENOBUFS; 1240 } 1241 1242 mrt6stat.mrt6s_upcalls++; 1243 1244 /* insert new entry at head of hash chain */ 1245 memset(rt, 0, sizeof(*rt)); 1246 sockaddr_in6_init(&rt->mf6c_origin, &ip6->ip6_src, 1247 0, 0, 0); 1248 sockaddr_in6_init(&rt->mf6c_mcastgrp, &ip6->ip6_dst, 1249 0, 0, 0); 1250 rt->mf6c_expire = UPCALL_EXPIRE; 1251 n6expire[hash]++; 1252 rt->mf6c_parent = MF6C_INCOMPLETE_PARENT; 1253 1254 /* link into table */ 1255 rt->mf6c_next = mf6ctable[hash]; 1256 mf6ctable[hash] = rt; 1257 /* Add this entry to the end of the queue */ 1258 rt->mf6c_stall = rte; 1259 } else { 1260 /* determine if q has overflowed */ 1261 struct rtdetq **p; 1262 int npkts = 0; 1263 1264 for (p = &rt->mf6c_stall; *p != NULL; p = &(*p)->next) 1265 if (++npkts > MAX_UPQ6) { 1266 mrt6stat.mrt6s_upq_ovflw++; 1267 free(rte, M_MRTABLE); 1268 m_freem(mb0); 1269 splx(s); 1270 return 0; 1271 } 1272 1273 /* Add this entry to the end of the queue */ 1274 *p = rte; 1275 } 1276 1277 rte->next = NULL; 1278 rte->m = mb0; 1279 rte->ifp = ifp; 1280 #ifdef UPCALL_TIMING 1281 rte->t = tp; 1282 #endif /* UPCALL_TIMING */ 1283 1284 splx(s); 1285 1286 return 0; 1287 } 1288 } 1289 1290 /* 1291 * Clean up cache entries if upcalls are not serviced 1292 * Call from the Slow Timeout mechanism, every 0.25 seconds. 1293 */ 1294 static void 1295 expire_upcalls(void *unused) 1296 { 1297 struct rtdetq *rte; 1298 struct mf6c *mfc, **nptr; 1299 int i; 1300 1301 mutex_enter(softnet_lock); 1302 KERNEL_LOCK(1, NULL); 1303 1304 for (i = 0; i < MF6CTBLSIZ; i++) { 1305 if (n6expire[i] == 0) 1306 continue; 1307 nptr = &mf6ctable[i]; 1308 while ((mfc = *nptr) != NULL) { 1309 rte = mfc->mf6c_stall; 1310 /* 1311 * Skip real cache entries 1312 * Make sure it wasn't marked to not expire (shouldn't happen) 1313 * If it expires now 1314 */ 1315 if (rte != NULL && 1316 mfc->mf6c_expire != 0 && 1317 --mfc->mf6c_expire == 0) { 1318 #ifdef MRT6DEBUG 1319 if (mrt6debug & DEBUG_EXPIRE) 1320 log(LOG_DEBUG, "expire_upcalls: expiring (%s %s)\n", 1321 ip6_sprintf(&mfc->mf6c_origin.sin6_addr), 1322 ip6_sprintf(&mfc->mf6c_mcastgrp.sin6_addr)); 1323 #endif 1324 /* 1325 * drop all the packets 1326 * free the mbuf with the pkt, if, timing info 1327 */ 1328 do { 1329 struct rtdetq *n = rte->next; 1330 m_freem(rte->m); 1331 free(rte, M_MRTABLE); 1332 rte = n; 1333 } while (rte != NULL); 1334 mrt6stat.mrt6s_cache_cleanups++; 1335 n6expire[i]--; 1336 1337 *nptr = mfc->mf6c_next; 1338 free(mfc, M_MRTABLE); 1339 } else { 1340 nptr = &mfc->mf6c_next; 1341 } 1342 } 1343 } 1344 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, 1345 expire_upcalls, NULL); 1346 1347 KERNEL_UNLOCK_ONE(NULL); 1348 mutex_exit(softnet_lock); 1349 } 1350 1351 /* 1352 * Packet forwarding routine once entry in the cache is made 1353 */ 1354 static int 1355 ip6_mdq(struct mbuf *m, struct ifnet *ifp, struct mf6c *rt) 1356 { 1357 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 1358 mifi_t mifi, iif; 1359 struct mif6 *mifp; 1360 int plen = m->m_pkthdr.len; 1361 struct in6_addr src0, dst0; /* copies for local work */ 1362 u_int32_t iszone, idzone, oszone, odzone; 1363 int error = 0; 1364 1365 /* 1366 * Macro to send packet on mif. Since RSVP packets don't get counted on 1367 * input, they shouldn't get counted on output, so statistics keeping is 1368 * separate. 1369 */ 1370 1371 #define MC6_SEND(ip6, mifp, m) do { \ 1372 if ((mifp)->m6_flags & MIFF_REGISTER) \ 1373 register_send((ip6), (mifp), (m)); \ 1374 else \ 1375 phyint_send((ip6), (mifp), (m)); \ 1376 } while (/*CONSTCOND*/ 0) 1377 1378 /* 1379 * Don't forward if it didn't arrive from the parent mif 1380 * for its origin. 1381 */ 1382 mifi = rt->mf6c_parent; 1383 if ((mifi >= nummifs) || (mif6table[mifi].m6_ifp != ifp)) { 1384 /* came in the wrong interface */ 1385 #ifdef MRT6DEBUG 1386 if (mrt6debug & DEBUG_FORWARD) 1387 log(LOG_DEBUG, 1388 "wrong if: ifid %d mifi %d mififid %x\n", 1389 ifp->if_index, mifi, 1390 mif6table[mifi].m6_ifp ? 1391 mif6table[mifi].m6_ifp->if_index : -1); 1392 #endif 1393 mrt6stat.mrt6s_wrong_if++; 1394 rt->mf6c_wrong_if++; 1395 /* 1396 * If we are doing PIM processing, and we are forwarding 1397 * packets on this interface, send a message to the 1398 * routing daemon. 1399 */ 1400 /* have to make sure this is a valid mif */ 1401 if (mifi < nummifs && mif6table[mifi].m6_ifp) 1402 if (pim6 && (m->m_flags & M_LOOP) == 0) { 1403 /* 1404 * Check the M_LOOP flag to avoid an 1405 * unnecessary PIM assert. 1406 * XXX: M_LOOP is an ad-hoc hack... 1407 */ 1408 struct sockaddr_in6 sin6; 1409 1410 struct mbuf *mm; 1411 struct mrt6msg *im; 1412 struct omrt6msg *oim; 1413 1414 mm = m_copy(m, 0, sizeof(struct ip6_hdr)); 1415 if (mm && 1416 (M_READONLY(mm) || 1417 mm->m_len < sizeof(struct ip6_hdr))) 1418 mm = m_pullup(mm, sizeof(struct ip6_hdr)); 1419 if (mm == NULL) 1420 return ENOBUFS; 1421 1422 oim = NULL; 1423 im = NULL; 1424 switch (ip6_mrouter_ver) { 1425 case MRT6_OINIT: 1426 oim = mtod(mm, struct omrt6msg *); 1427 oim->im6_msgtype = MRT6MSG_WRONGMIF; 1428 oim->im6_mbz = 0; 1429 break; 1430 case MRT6_INIT: 1431 im = mtod(mm, struct mrt6msg *); 1432 im->im6_msgtype = MRT6MSG_WRONGMIF; 1433 im->im6_mbz = 0; 1434 break; 1435 default: 1436 m_freem(mm); 1437 return EINVAL; 1438 } 1439 1440 for (mifp = mif6table, iif = 0; 1441 iif < nummifs && mifp && 1442 mifp->m6_ifp != ifp; 1443 mifp++, iif++) 1444 ; 1445 1446 memset(&sin6, 0, sizeof(sin6)); 1447 sin6.sin6_len = sizeof(sin6); 1448 sin6.sin6_family = AF_INET6; 1449 switch (ip6_mrouter_ver) { 1450 case MRT6_OINIT: 1451 oim->im6_mif = iif; 1452 sin6.sin6_addr = oim->im6_src; 1453 break; 1454 case MRT6_INIT: 1455 im->im6_mif = iif; 1456 sin6.sin6_addr = im->im6_src; 1457 break; 1458 } 1459 1460 mrt6stat.mrt6s_upcalls++; 1461 1462 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1463 #ifdef MRT6DEBUG 1464 if (mrt6debug) 1465 log(LOG_WARNING, "mdq, ip6_mrouter socket queue full\n"); 1466 #endif 1467 ++mrt6stat.mrt6s_upq_sockfull; 1468 return ENOBUFS; 1469 } /* if socket Q full */ 1470 } /* if PIM */ 1471 return 0; 1472 } /* if wrong iif */ 1473 1474 /* If I sourced this packet, it counts as output, else it was input. */ 1475 if (m->m_pkthdr.rcvif_index == 0) { 1476 /* XXX: is rcvif really NULL when output?? */ 1477 mif6table[mifi].m6_pkt_out++; 1478 mif6table[mifi].m6_bytes_out += plen; 1479 } else { 1480 mif6table[mifi].m6_pkt_in++; 1481 mif6table[mifi].m6_bytes_in += plen; 1482 } 1483 rt->mf6c_pkt_cnt++; 1484 rt->mf6c_byte_cnt += plen; 1485 1486 /* 1487 * For each mif, forward a copy of the packet if there are group 1488 * members downstream on the interface. 1489 */ 1490 src0 = ip6->ip6_src; 1491 dst0 = ip6->ip6_dst; 1492 if ((error = in6_setscope(&src0, ifp, &iszone)) != 0 || 1493 (error = in6_setscope(&dst0, ifp, &idzone)) != 0) { 1494 IP6_STATINC(IP6_STAT_BADSCOPE); 1495 return (error); 1496 } 1497 for (mifp = mif6table, mifi = 0; mifi < nummifs; mifp++, mifi++) 1498 if (IF_ISSET(mifi, &rt->mf6c_ifset)) { 1499 if (mif6table[mifi].m6_ifp == NULL) 1500 continue; 1501 /* 1502 * check if the outgoing packet is going to break 1503 * a scope boundary. 1504 * XXX: For packets through PIM register tunnel 1505 * interface, we believe the routing daemon. 1506 */ 1507 if ((mif6table[rt->mf6c_parent].m6_flags & 1508 MIFF_REGISTER) == 0 && 1509 (mif6table[mifi].m6_flags & MIFF_REGISTER) == 0) { 1510 if (in6_setscope(&src0, mif6table[mifi].m6_ifp, 1511 &oszone) || 1512 in6_setscope(&dst0, mif6table[mifi].m6_ifp, 1513 &odzone) || 1514 iszone != oszone || idzone != odzone) { 1515 IP6_STATINC(IP6_STAT_BADSCOPE); 1516 continue; 1517 } 1518 } 1519 1520 mifp->m6_pkt_out++; 1521 mifp->m6_bytes_out += plen; 1522 MC6_SEND(ip6, mifp, m); 1523 } 1524 return 0; 1525 } 1526 1527 static void 1528 phyint_send(struct ip6_hdr *ip6, struct mif6 *mifp, struct mbuf *m) 1529 { 1530 struct mbuf *mb_copy; 1531 struct ifnet *ifp = mifp->m6_ifp; 1532 int error __mrt6debugused = 0; 1533 int s; 1534 static struct route ro; 1535 struct in6_multi *in6m; 1536 struct sockaddr_in6 dst6; 1537 u_long linkmtu; 1538 1539 s = splsoftnet(); 1540 /* 1541 * Make a new reference to the packet; make sure that 1542 * the IPv6 header is actually copied, not just referenced, 1543 * so that ip6_output() only scribbles on the copy. 1544 */ 1545 mb_copy = m_copy(m, 0, M_COPYALL); 1546 if (mb_copy && 1547 (M_READONLY(mb_copy) || mb_copy->m_len < sizeof(struct ip6_hdr))) 1548 mb_copy = m_pullup(mb_copy, sizeof(struct ip6_hdr)); 1549 if (mb_copy == NULL) { 1550 splx(s); 1551 return; 1552 } 1553 /* set MCAST flag to the outgoing packet */ 1554 mb_copy->m_flags |= M_MCAST; 1555 1556 /* 1557 * If we sourced the packet, call ip6_output since we may divide 1558 * the packet into fragments when the packet is too big for the 1559 * outgoing interface. 1560 * Otherwise, we can simply send the packet to the interface 1561 * sending queue. 1562 */ 1563 if (m->m_pkthdr.rcvif_index == 0) { 1564 struct ip6_moptions im6o; 1565 1566 im6o.im6o_multicast_if_index = if_get_index(ifp); 1567 /* XXX: ip6_output will override ip6->ip6_hlim */ 1568 im6o.im6o_multicast_hlim = ip6->ip6_hlim; 1569 im6o.im6o_multicast_loop = 1; 1570 error = ip6_output(mb_copy, NULL, &ro, IPV6_FORWARDING, 1571 &im6o, NULL, NULL); 1572 1573 #ifdef MRT6DEBUG 1574 if (mrt6debug & DEBUG_XMIT) 1575 log(LOG_DEBUG, "phyint_send on mif %td err %d\n", 1576 mifp - mif6table, error); 1577 #endif 1578 splx(s); 1579 return; 1580 } 1581 1582 /* 1583 * If we belong to the destination multicast group 1584 * on the outgoing interface, loop back a copy. 1585 */ 1586 /* 1587 * Does not have to check source info, as it's alreay covered by 1588 * ip6_input 1589 */ 1590 sockaddr_in6_init(&dst6, &ip6->ip6_dst, 0, 0, 0); 1591 1592 IN6_LOOKUP_MULTI(ip6->ip6_dst, ifp, in6m); 1593 if (in6m != NULL) { 1594 ip6_mloopback(ifp, m, 1595 satocsin6(rtcache_getdst(&ro))); 1596 } 1597 1598 /* 1599 * Put the packet into the sending queue of the outgoing interface 1600 * if it would fit in the MTU of the interface. 1601 */ 1602 linkmtu = IN6_LINKMTU(ifp); 1603 if (mb_copy->m_pkthdr.len <= linkmtu || linkmtu < IPV6_MMTU) { 1604 /* 1605 * We could call if_output directly here, but we use 1606 * nd6_output on purpose to see if IPv6 operation is allowed 1607 * on the interface. 1608 */ 1609 error = nd6_output(ifp, ifp, mb_copy, &dst6, NULL); 1610 #ifdef MRT6DEBUG 1611 if (mrt6debug & DEBUG_XMIT) 1612 log(LOG_DEBUG, "phyint_send on mif %td err %d\n", 1613 mifp - mif6table, error); 1614 #endif 1615 } else { 1616 /* 1617 * pMTU discovery is intentionally disabled by default, since 1618 * various router may notify pMTU in multicast, which can be 1619 * a DDoS to a router 1620 */ 1621 if (ip6_mcast_pmtu) 1622 icmp6_error(mb_copy, ICMP6_PACKET_TOO_BIG, 0, linkmtu); 1623 else { 1624 #ifdef MRT6DEBUG 1625 if (mrt6debug & DEBUG_XMIT) 1626 log(LOG_DEBUG, 1627 "phyint_send: packet too big on %s o %s g %s" 1628 " size %d(discarded)\n", 1629 if_name(ifp), 1630 ip6_sprintf(&ip6->ip6_src), 1631 ip6_sprintf(&ip6->ip6_dst), 1632 mb_copy->m_pkthdr.len); 1633 #endif /* MRT6DEBUG */ 1634 m_freem(mb_copy); /* simply discard the packet */ 1635 } 1636 } 1637 1638 splx(s); 1639 } 1640 1641 static int 1642 register_send(struct ip6_hdr *ip6, struct mif6 *mif, struct mbuf *m) 1643 { 1644 struct mbuf *mm; 1645 int i, len = m->m_pkthdr.len; 1646 struct sockaddr_in6 sin6; 1647 struct mrt6msg *im6; 1648 1649 #ifdef MRT6DEBUG 1650 if (mrt6debug) 1651 log(LOG_DEBUG, "** IPv6 register_send **\n src %s dst %s\n", 1652 ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst)); 1653 #endif 1654 PIM6_STATINC(PIM6_STAT_SND_REGISTERS); 1655 1656 /* Make a copy of the packet to send to the user level process */ 1657 MGETHDR(mm, M_DONTWAIT, MT_HEADER); 1658 if (mm == NULL) 1659 return ENOBUFS; 1660 mm->m_data += max_linkhdr; 1661 mm->m_len = sizeof(struct ip6_hdr); 1662 1663 if ((mm->m_next = m_copy(m, 0, M_COPYALL)) == NULL) { 1664 m_freem(mm); 1665 return ENOBUFS; 1666 } 1667 i = MHLEN - M_LEADINGSPACE(mm); 1668 if (i > len) 1669 i = len; 1670 mm = m_pullup(mm, i); 1671 if (mm == NULL) 1672 return ENOBUFS; 1673 /* TODO: check it! */ 1674 mm->m_pkthdr.len = len + sizeof(struct ip6_hdr); 1675 1676 /* 1677 * Send message to routing daemon 1678 */ 1679 sockaddr_in6_init(&sin6, &ip6->ip6_src, 0, 0, 0); 1680 1681 im6 = mtod(mm, struct mrt6msg *); 1682 im6->im6_msgtype = MRT6MSG_WHOLEPKT; 1683 im6->im6_mbz = 0; 1684 1685 im6->im6_mif = mif - mif6table; 1686 1687 /* iif info is not given for reg. encap.n */ 1688 mrt6stat.mrt6s_upcalls++; 1689 1690 if (socket_send(ip6_mrouter, mm, &sin6) < 0) { 1691 #ifdef MRT6DEBUG 1692 if (mrt6debug) 1693 log(LOG_WARNING, 1694 "register_send: ip6_mrouter socket queue full\n"); 1695 #endif 1696 ++mrt6stat.mrt6s_upq_sockfull; 1697 return ENOBUFS; 1698 } 1699 return 0; 1700 } 1701 1702 /* 1703 * PIM sparse mode hook 1704 * Receives the pim control messages, and passes them up to the listening 1705 * socket, using rip6_input. 1706 * The only message processed is the REGISTER pim message; the pim header 1707 * is stripped off, and the inner packet is passed to register_mforward. 1708 */ 1709 int 1710 pim6_input(struct mbuf **mp, int *offp, int proto) 1711 { 1712 struct pim *pim; /* pointer to a pim struct */ 1713 struct ip6_hdr *ip6 __mrt6debugused; 1714 int pimlen; 1715 struct mbuf *m = *mp; 1716 int minlen; 1717 int off = *offp; 1718 1719 PIM6_STATINC(PIM6_STAT_RCV_TOTAL); 1720 1721 ip6 = mtod(m, struct ip6_hdr *); 1722 pimlen = m->m_pkthdr.len - *offp; 1723 1724 /* 1725 * Validate lengths 1726 */ 1727 if (pimlen < PIM_MINLEN) { 1728 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1729 #ifdef MRT6DEBUG 1730 if (mrt6debug & DEBUG_PIM) 1731 log(LOG_DEBUG,"pim6_input: PIM packet too short\n"); 1732 #endif 1733 m_freem(m); 1734 return (IPPROTO_DONE); 1735 } 1736 1737 /* 1738 * if the packet is at least as big as a REGISTER, go ahead 1739 * and grab the PIM REGISTER header size, to avoid another 1740 * possible m_pullup() later. 1741 * 1742 * PIM_MINLEN == pimhdr + u_int32 == 8 1743 * PIM6_REG_MINLEN == pimhdr + reghdr + eip6hdr == 4 + 4 + 40 1744 */ 1745 minlen = (pimlen >= PIM6_REG_MINLEN) ? PIM6_REG_MINLEN : PIM_MINLEN; 1746 1747 /* 1748 * Make sure that the IP6 and PIM headers in contiguous memory, and 1749 * possibly the PIM REGISTER header 1750 */ 1751 IP6_EXTHDR_GET(pim, struct pim *, m, off, minlen); 1752 if (pim == NULL) { 1753 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1754 return IPPROTO_DONE; 1755 } 1756 1757 /* PIM version check */ 1758 if (pim->pim_ver != PIM_VERSION) { 1759 PIM6_STATINC(PIM6_STAT_RCV_BADVERSION); 1760 #ifdef MRT6DEBUG 1761 log(LOG_ERR, 1762 "pim6_input: incorrect version %d, expecting %d\n", 1763 pim->pim_ver, PIM_VERSION); 1764 #endif 1765 m_freem(m); 1766 return (IPPROTO_DONE); 1767 } 1768 1769 #define PIM6_CHECKSUM 1770 #ifdef PIM6_CHECKSUM 1771 { 1772 int cksumlen; 1773 1774 /* 1775 * Validate checksum. 1776 * If PIM REGISTER, exclude the data packet 1777 */ 1778 if (pim->pim_type == PIM_REGISTER) 1779 cksumlen = PIM_MINLEN; 1780 else 1781 cksumlen = pimlen; 1782 1783 if (in6_cksum(m, IPPROTO_PIM, off, cksumlen)) { 1784 PIM6_STATINC(PIM6_STAT_RCV_BADSUM); 1785 #ifdef MRT6DEBUG 1786 if (mrt6debug & DEBUG_PIM) 1787 log(LOG_DEBUG, 1788 "pim6_input: invalid checksum\n"); 1789 #endif 1790 m_freem(m); 1791 return (IPPROTO_DONE); 1792 } 1793 } 1794 #endif /* PIM_CHECKSUM */ 1795 1796 if (pim->pim_type == PIM_REGISTER) { 1797 /* 1798 * since this is a REGISTER, we'll make a copy of the register 1799 * headers ip6+pim+u_int32_t+encap_ip6, to be passed up to the 1800 * routing daemon. 1801 */ 1802 static const struct sockaddr_in6 dst = { 1803 .sin6_len = sizeof(dst), 1804 .sin6_family = AF_INET6, 1805 }; 1806 1807 struct mbuf *mcp; 1808 struct ip6_hdr *eip6; 1809 u_int32_t *reghdr; 1810 1811 PIM6_STATINC(PIM6_STAT_RCV_REGISTERS); 1812 1813 if ((reg_mif_num >= nummifs) || (reg_mif_num == (mifi_t) -1)) { 1814 #ifdef MRT6DEBUG 1815 if (mrt6debug & DEBUG_PIM) 1816 log(LOG_DEBUG, 1817 "pim6_input: register mif not set: %d\n", 1818 reg_mif_num); 1819 #endif 1820 m_freem(m); 1821 return (IPPROTO_DONE); 1822 } 1823 1824 reghdr = (u_int32_t *)(pim + 1); 1825 1826 if ((ntohl(*reghdr) & PIM_NULL_REGISTER)) 1827 goto pim6_input_to_daemon; 1828 1829 /* 1830 * Validate length 1831 */ 1832 if (pimlen < PIM6_REG_MINLEN) { 1833 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT); 1834 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1835 #ifdef MRT6DEBUG 1836 log(LOG_ERR, 1837 "pim6_input: register packet size too " 1838 "small %d from %s\n", 1839 pimlen, ip6_sprintf(&ip6->ip6_src)); 1840 #endif 1841 m_freem(m); 1842 return (IPPROTO_DONE); 1843 } 1844 1845 eip6 = (struct ip6_hdr *) (reghdr + 1); 1846 #ifdef MRT6DEBUG 1847 if (mrt6debug & DEBUG_PIM) 1848 log(LOG_DEBUG, 1849 "pim6_input[register], eip6: %s -> %s, " 1850 "eip6 plen %d\n", 1851 ip6_sprintf(&eip6->ip6_src), 1852 ip6_sprintf(&eip6->ip6_dst), 1853 ntohs(eip6->ip6_plen)); 1854 #endif 1855 1856 /* verify the version number of the inner packet */ 1857 if ((eip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) { 1858 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1859 #ifdef MRT6DEBUG 1860 log(LOG_DEBUG, "pim6_input: invalid IP version (%d) " 1861 "of the inner packet\n", 1862 (eip6->ip6_vfc & IPV6_VERSION)); 1863 #endif 1864 m_freem(m); 1865 return (IPPROTO_NONE); 1866 } 1867 1868 /* verify the inner packet is destined to a mcast group */ 1869 if (!IN6_IS_ADDR_MULTICAST(&eip6->ip6_dst)) { 1870 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS); 1871 #ifdef MRT6DEBUG 1872 if (mrt6debug & DEBUG_PIM) 1873 log(LOG_DEBUG, 1874 "pim6_input: inner packet of register " 1875 "is not multicast %s\n", 1876 ip6_sprintf(&eip6->ip6_dst)); 1877 #endif 1878 m_freem(m); 1879 return (IPPROTO_DONE); 1880 } 1881 1882 /* 1883 * make a copy of the whole header to pass to the daemon later. 1884 */ 1885 mcp = m_copy(m, 0, off + PIM6_REG_MINLEN); 1886 if (mcp == NULL) { 1887 #ifdef MRT6DEBUG 1888 log(LOG_ERR, 1889 "pim6_input: pim register: " 1890 "could not copy register head\n"); 1891 #endif 1892 m_freem(m); 1893 return (IPPROTO_DONE); 1894 } 1895 1896 /* 1897 * forward the inner ip6 packet; point m_data at the inner ip6. 1898 */ 1899 m_adj(m, off + PIM_MINLEN); 1900 #ifdef MRT6DEBUG 1901 if (mrt6debug & DEBUG_PIM) { 1902 log(LOG_DEBUG, 1903 "pim6_input: forwarding decapsulated register: " 1904 "src %s, dst %s, mif %d\n", 1905 ip6_sprintf(&eip6->ip6_src), 1906 ip6_sprintf(&eip6->ip6_dst), 1907 reg_mif_num); 1908 } 1909 #endif 1910 1911 looutput(mif6table[reg_mif_num].m6_ifp, m, sin6tocsa(&dst), 1912 NULL); 1913 1914 /* prepare the register head to send to the mrouting daemon */ 1915 m = mcp; 1916 } 1917 1918 /* 1919 * Pass the PIM message up to the daemon; if it is a register message 1920 * pass the 'head' only up to the daemon. This includes the 1921 * encapsulator ip6 header, pim header, register header and the 1922 * encapsulated ip6 header. 1923 */ 1924 pim6_input_to_daemon: 1925 rip6_input(&m, offp, proto); 1926 return (IPPROTO_DONE); 1927 } 1928 1929 static int 1930 sysctl_net_inet6_pim6_stats(SYSCTLFN_ARGS) 1931 { 1932 1933 return (NETSTAT_SYSCTL(pim6stat_percpu, PIM6_NSTATS)); 1934 } 1935 1936 static void 1937 sysctl_net_inet6_pim6_setup(struct sysctllog **clog) 1938 { 1939 1940 sysctl_createv(clog, 0, NULL, NULL, 1941 CTLFLAG_PERMANENT, 1942 CTLTYPE_NODE, "inet6", NULL, 1943 NULL, 0, NULL, 0, 1944 CTL_NET, PF_INET6, CTL_EOL); 1945 sysctl_createv(clog, 0, NULL, NULL, 1946 CTLFLAG_PERMANENT, 1947 CTLTYPE_NODE, "pim6", 1948 SYSCTL_DESCR("PIMv6 settings"), 1949 NULL, 0, NULL, 0, 1950 CTL_NET, PF_INET6, IPPROTO_PIM, CTL_EOL); 1951 1952 sysctl_createv(clog, 0, NULL, NULL, 1953 CTLFLAG_PERMANENT, 1954 CTLTYPE_STRUCT, "stats", 1955 SYSCTL_DESCR("PIMv6 statistics"), 1956 sysctl_net_inet6_pim6_stats, 0, NULL, 0, 1957 CTL_NET, PF_INET6, IPPROTO_PIM, PIM6CTL_STATS, 1958 CTL_EOL); 1959 } 1960