1/* 2 * Copyright (c) 2000-2013 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28/* 29 * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce 30 * support for mandatory and extensible security protections. This notice 31 * is included in support of clause 2.2 (b) of the Apple Public License, 32 * Version 2.0. 33 */ 34/* 35 * IP multicast forwarding procedures 36 * 37 * Written by David Waitzman, BBN Labs, August 1988. 38 * Modified by Steve Deering, Stanford, February 1989. 39 * Modified by Mark J. Steiglitz, Stanford, May, 1991 40 * Modified by Van Jacobson, LBL, January 1993 41 * Modified by Ajit Thyagarajan, PARC, August 1993 42 * Modified by Bill Fenner, PARC, April 1995 43 * 44 * MROUTING Revision: 3.5 45 * $FreeBSD: src/sys/netinet/ip_mroute.c,v 1.56.2.2 2001/07/19 06:37:26 kris Exp $ 46 */ 47 48 49#include <sys/param.h> 50#include <sys/systm.h> 51#include <sys/malloc.h> 52#include <sys/mbuf.h> 53#include <sys/socket.h> 54#include <sys/socketvar.h> 55#include <sys/protosw.h> 56#include <sys/time.h> 57#include <sys/kernel.h> 58#include <sys/sockio.h> 59#include <sys/syslog.h> 60 61#include <machine/endian.h> 62 63#include <net/if.h> 64#include <net/route.h> 65#include <net/kpi_protocol.h> 66#include <netinet/in.h> 67#include <netinet/in_systm.h> 68#include <netinet/ip.h> 69#include <netinet/ip_var.h> 70#include <netinet/in_var.h> 71#include <netinet/igmp.h> 72#include <netinet/ip_mroute.h> 73#include <netinet/udp.h> 74 75#if CONFIG_MACF_NET 76#include <security/mac_framework.h> 77#endif 78 79 80#if !MROUTING 81extern u_int32_t _ip_mcast_src(int vifi); 82extern int _ip_mforward(struct ip *ip, struct ifnet *ifp, 83 struct mbuf *m, struct ip_moptions *imo); 84extern int _ip_mrouter_done(void); 85extern int _ip_mrouter_get(struct socket *so, struct sockopt *sopt); 86extern int _ip_mrouter_set(struct socket *so, struct sockopt *sopt); 87extern int _mrt_ioctl(int req, caddr_t data, struct proc *p); 88 89/* 90 * Dummy routines and globals used when multicast routing is not compiled in. 91 */ 92 93struct socket *ip_mrouter = NULL; 94u_int rsvpdebug = 0; 95 96int 97_ip_mrouter_set(__unused struct socket *so, 98 __unused struct sockopt *sopt) 99{ 100 return(EOPNOTSUPP); 101} 102 103int (*ip_mrouter_set)(struct socket *, struct sockopt *) = _ip_mrouter_set; 104 105 106int 107_ip_mrouter_get(__unused struct socket *so, 108 __unused sockopt *sopt) 109{ 110 return(EOPNOTSUPP); 111} 112 113int (*ip_mrouter_get)(struct socket *, struct sockopt *) = _ip_mrouter_get; 114 115int 116_ip_mrouter_done(void) 117{ 118 return(0); 119} 120 121int (*ip_mrouter_done)(void) = _ip_mrouter_done; 122 123int 124_ip_mforward(__unused struct ip *ip, __unused struct ifnet *ifp, 125 __unused struct mbuf *m, __unused ip_moptions *imo) 126{ 127 return(0); 128} 129 130int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *, 131 struct ip_moptions *) = _ip_mforward; 132 133int 134_mrt_ioctl(__unused u_long req, __unused caddr_t data, __unused struct proc *p) 135{ 136 return EOPNOTSUPP; 137} 138 139int (*mrt_ioctl)(u_long, caddr_t, struct proc *) = _mrt_ioctl; 140 141void 142rsvp_input(struct mbuf *m, int iphlen) /* XXX must fixup manually */ 143{ 144 /* Can still get packets with rsvp_on = 0 if there is a local member 145 * of the group to which the RSVP packet is addressed. But in this 146 * case we want to throw the packet away. 147 */ 148 if (!rsvp_on) { 149 m_freem(m); 150 return; 151 } 152 153 if (ip_rsvpd != NULL) { 154 if (rsvpdebug) 155 printf("rsvp_input: Sending packet up old-style socket\n"); 156 rip_input(m, iphlen); 157 return; 158 } 159 /* Drop the packet */ 160 m_freem(m); 161} 162 163void ipip_input(struct mbuf *m, int iphlen) { /* XXX must fixup manually */ 164 rip_input(m, iphlen); 165} 166 167int (*legal_vif_num)(int) = 0; 168 169/* 170 * This should never be called, since IP_MULTICAST_VIF should fail, but 171 * just in case it does get called, the code a little lower in ip_output 172 * will assign the packet a local address. 173 */ 174u_int32_t 175_ip_mcast_src(int vifi) { return INADDR_ANY; } 176u_int32_t (*ip_mcast_src)(int) = _ip_mcast_src; 177 178int 179ip_rsvp_vif_init(so, sopt) 180 struct socket *so; 181 struct sockopt *sopt; 182{ 183 return(EINVAL); 184} 185 186int 187ip_rsvp_vif_done(so, sopt) 188 struct socket *so; 189 struct sockopt *sopt; 190{ 191 return(EINVAL); 192} 193 194void 195ip_rsvp_force_done(so) 196 struct socket *so; 197{ 198 return; 199} 200 201#else /* MROUTING */ 202 203#define M_HASCL(m) ((m)->m_flags & M_EXT) 204 205#define INSIZ sizeof(struct in_addr) 206#define same(a1, a2) \ 207 (bcmp((caddr_t)(a1), (caddr_t)(a2), INSIZ) == 0) 208 209 210/* 211 * Globals. All but ip_mrouter and ip_mrtproto could be static, 212 * except for netstat or debugging purposes. 213 */ 214#ifndef MROUTE_LKM 215struct socket *ip_mrouter = NULL; 216static struct mrtstat mrtstat; 217#else /* MROUTE_LKM */ 218extern void X_ipip_input(struct mbuf *m, int iphlen); 219extern struct mrtstat mrtstat; 220static int ip_mrtproto; 221#endif 222 223#define NO_RTE_FOUND 0x1 224#define RTE_FOUND 0x2 225 226static struct mfc *mfctable[CONFIG_MFCTBLSIZ]; 227static u_char nexpire[CONFIG_MFCTBLSIZ]; 228static struct vif viftable[CONFIG_MAXVIFS]; 229static u_int mrtdebug = 0; /* debug level */ 230#define DEBUG_MFC 0x02 231#define DEBUG_FORWARD 0x04 232#define DEBUG_EXPIRE 0x08 233#define DEBUG_XMIT 0x10 234static u_int tbfdebug = 0; /* tbf debug level */ 235static u_int rsvpdebug = 0; /* rsvp debug level */ 236 237#define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */ 238#define UPCALL_EXPIRE 6 /* number of timeouts */ 239 240/* 241 * Define the token bucket filter structures 242 * tbftable -> each vif has one of these for storing info 243 */ 244 245static struct tbf tbftable[CONFIG_MAXVIFS]; 246#define TBF_REPROCESS (hz / 100) /* 100x / second */ 247 248/* 249 * 'Interfaces' associated with decapsulator (so we can tell 250 * packets that went through it from ones that get reflected 251 * by a broken gateway). These interfaces are never linked into 252 * the system ifnet list & no routes point to them. I.e., packets 253 * can't be sent this way. They only exist as a placeholder for 254 * multicast source verification. 255 */ 256static struct ifnet multicast_decap_if[CONFIG_MAXVIFS]; 257 258#define ENCAP_TTL 64 259#define ENCAP_PROTO IPPROTO_IPIP /* 4 */ 260 261/* prototype IP hdr for encapsulated packets */ 262static struct ip multicast_encap_iphdr = { 263#if BYTE_ORDER == LITTLE_ENDIAN 264 sizeof(struct ip) >> 2, IPVERSION, 265#else 266 IPVERSION, sizeof(struct ip) >> 2, 267#endif 268 0, /* tos */ 269 sizeof(struct ip), /* total length */ 270 0, /* id */ 271 0, /* frag offset */ 272 ENCAP_TTL, ENCAP_PROTO, 273 0, /* checksum */ 274 { 0 }, { 0 } 275}; 276 277/* 278 * Private variables. 279 */ 280static vifi_t numvifs = 0; 281static int have_encap_tunnel = 0; 282 283/* 284 * one-back cache used by ipip_input to locate a tunnel's vif 285 * given a datagram's src ip address. 286 */ 287static u_int32_t last_encap_src; 288static struct vif *last_encap_vif; 289 290static u_int32_t X_ip_mcast_src(int vifi); 291static int X_ip_mforward(struct ip *ip, struct ifnet *ifp, struct mbuf *m, struct ip_moptions *imo); 292static int X_ip_mrouter_done(void); 293static int X_ip_mrouter_get(struct socket *so, struct sockopt *m); 294static int X_ip_mrouter_set(struct socket *so, struct sockopt *m); 295static int X_legal_vif_num(int vif); 296static int X_mrt_ioctl(u_long cmd, caddr_t data); 297 298static int get_sg_cnt(struct sioc_sg_req *); 299static int get_vif_cnt(struct sioc_vif_req *); 300static int ip_mrouter_init(struct socket *, int); 301static int add_vif(struct vifctl *); 302static int del_vif(vifi_t); 303static int add_mfc(struct mfcctl *); 304static int del_mfc(struct mfcctl *); 305static int socket_send(struct socket *, struct mbuf *, struct sockaddr_in *); 306static int set_assert(int); 307static void expire_upcalls(void *); 308static int ip_mdq(struct mbuf *, struct ifnet *, struct mfc *, 309 vifi_t); 310static void phyint_send(struct ip *, struct vif *, struct mbuf *); 311static void encap_send(struct ip *, struct vif *, struct mbuf *); 312static void tbf_control(struct vif *, struct mbuf *, struct ip *, u_int32_t); 313static void tbf_queue(struct vif *, struct mbuf *); 314static void tbf_process_q(struct vif *); 315static void tbf_reprocess_q(void *); 316static int tbf_dq_sel(struct vif *, struct ip *); 317static void tbf_send_packet(struct vif *, struct mbuf *); 318static void tbf_update_tokens(struct vif *); 319static int priority(struct vif *, struct ip *); 320void multiencap_decap(struct mbuf *); 321 322/* 323 * whether or not special PIM assert processing is enabled. 324 */ 325static int pim_assert; 326/* 327 * Rate limit for assert notification messages, in usec 328 */ 329#define ASSERT_MSG_TIME 3000000 330 331/* 332 * Hash function for a source, group entry 333 */ 334#define MFCHASH(a, g) MFCHASHMOD(((a) >> 20) ^ ((a) >> 10) ^ (a) ^ \ 335 ((g) >> 20) ^ ((g) >> 10) ^ (g)) 336 337/* 338 * Find a route for a given origin IP address and Multicast group address 339 * Type of service parameter to be added in the future!!! 340 */ 341 342#define MFCFIND(o, g, rt) { \ 343 struct mfc *_rt = mfctable[MFCHASH(o,g)]; \ 344 rt = NULL; \ 345 ++mrtstat.mrts_mfc_lookups; \ 346 while (_rt) { \ 347 if ((_rt->mfc_origin.s_addr == o) && \ 348 (_rt->mfc_mcastgrp.s_addr == g) && \ 349 (_rt->mfc_stall == NULL)) { \ 350 rt = _rt; \ 351 break; \ 352 } \ 353 _rt = _rt->mfc_next; \ 354 } \ 355 if (rt == NULL) { \ 356 ++mrtstat.mrts_mfc_misses; \ 357 } \ 358} 359 360 361/* 362 * Macros to compute elapsed time efficiently 363 * Borrowed from Van Jacobson's scheduling code 364 */ 365#define TV_DELTA(a, b, delta) { \ 366 int xxs; \ 367 \ 368 delta = (a).tv_usec - (b).tv_usec; \ 369 if ((xxs = (a).tv_sec - (b).tv_sec)) { \ 370 switch (xxs) { \ 371 case 2: \ 372 delta += 1000000; \ 373 /* fall through */ \ 374 case 1: \ 375 delta += 1000000; \ 376 break; \ 377 default: \ 378 delta += (1000000 * xxs); \ 379 } \ 380 } \ 381} 382 383#define TV_LT(a, b) (((a).tv_usec < (b).tv_usec && \ 384 (a).tv_sec <= (b).tv_sec) || (a).tv_sec < (b).tv_sec) 385 386#if UPCALL_TIMING 387u_int32_t upcall_data[51]; 388static void collate(struct timeval *); 389#endif /* UPCALL_TIMING */ 390 391 392/* 393 * Handle MRT setsockopt commands to modify the multicast routing tables. 394 */ 395static int 396X_ip_mrouter_set(struct socket *so, struct sockopt *sopt) 397{ 398 int error, optval; 399 vifi_t vifi; 400 struct vifctl vifc; 401 struct mfcctl mfc; 402 403 if (so != ip_mrouter && sopt->sopt_name != MRT_INIT) 404 return (EPERM); 405 406 error = 0; 407 switch (sopt->sopt_name) { 408 case MRT_INIT: 409 error = sooptcopyin(sopt, &optval, sizeof optval, 410 sizeof optval); 411 if (error) 412 break; 413 error = ip_mrouter_init(so, optval); 414 break; 415 416 case MRT_DONE: 417 error = ip_mrouter_done(); 418 break; 419 420 case MRT_ADD_VIF: 421 error = sooptcopyin(sopt, &vifc, sizeof vifc, sizeof vifc); 422 if (error) 423 break; 424 error = add_vif(&vifc); 425 break; 426 427 case MRT_DEL_VIF: 428 error = sooptcopyin(sopt, &vifi, sizeof vifi, sizeof vifi); 429 if (error) 430 break; 431 error = del_vif(vifi); 432 break; 433 434 case MRT_ADD_MFC: 435 case MRT_DEL_MFC: 436 error = sooptcopyin(sopt, &mfc, sizeof mfc, sizeof mfc); 437 if (error) 438 break; 439 if (sopt->sopt_name == MRT_ADD_MFC) 440 error = add_mfc(&mfc); 441 else 442 error = del_mfc(&mfc); 443 break; 444 445 case MRT_ASSERT: 446 error = sooptcopyin(sopt, &optval, sizeof optval, 447 sizeof optval); 448 if (error) 449 break; 450 set_assert(optval); 451 break; 452 453 default: 454 error = EOPNOTSUPP; 455 break; 456 } 457 return (error); 458} 459 460#if !defined(MROUTE_LKM) || !MROUTE_LKM 461int (*ip_mrouter_set)(struct socket *, struct sockopt *) = X_ip_mrouter_set; 462#endif 463 464/* 465 * Handle MRT getsockopt commands 466 */ 467static int 468X_ip_mrouter_get(__unused struct socket *so, struct sockopt *sopt) 469{ 470 int error; 471 static int vers = 0x0305; /* !!! why is this here? XXX */ 472 473 switch (sopt->sopt_name) { 474 case MRT_VERSION: 475 error = sooptcopyout(sopt, &vers, sizeof vers); 476 break; 477 478 case MRT_ASSERT: 479 error = sooptcopyout(sopt, &pim_assert, sizeof pim_assert); 480 break; 481 default: 482 error = EOPNOTSUPP; 483 break; 484 } 485 return (error); 486} 487 488#if !defined(MROUTE_LKM) || !MROUTE_LKM 489int (*ip_mrouter_get)(struct socket *, struct sockopt *) = X_ip_mrouter_get; 490#endif 491 492/* 493 * Handle ioctl commands to obtain information from the cache 494 */ 495static int 496X_mrt_ioctl(u_long cmd, caddr_t data) 497{ 498 int error = 0; 499 500 switch (cmd) { 501 case (SIOCGETVIFCNT): 502 return (get_vif_cnt((struct sioc_vif_req *)data)); 503 break; 504 case (SIOCGETSGCNT): 505 return (get_sg_cnt((struct sioc_sg_req *)data)); 506 break; 507 default: 508 return (EINVAL); 509 break; 510 } 511 return error; 512} 513 514#if !defined(MROUTE_LKM) || !MROUTE_LKM 515int (*mrt_ioctl)(u_long, caddr_t) = X_mrt_ioctl; 516#endif 517 518/* 519 * returns the packet, byte, rpf-failure count for the source group provided 520 */ 521static int 522get_sg_cnt(struct sioc_sg_req *req) 523{ 524 struct mfc *rt; 525 526 MFCFIND(req->src.s_addr, req->grp.s_addr, rt); 527 if (rt != NULL) { 528 req->pktcnt = rt->mfc_pkt_cnt; 529 req->bytecnt = rt->mfc_byte_cnt; 530 req->wrong_if = rt->mfc_wrong_if; 531 } else 532 req->pktcnt = req->bytecnt = req->wrong_if = 0xffffffff; 533 534 return 0; 535} 536 537/* 538 * returns the input and output packet and byte counts on the vif provided 539 */ 540static int 541get_vif_cnt(struct sioc_vif_req *req) 542{ 543 vifi_t vifi = req->vifi; 544 545 if (vifi >= numvifs) return EINVAL; 546 547 req->icount = viftable[vifi].v_pkt_in; 548 req->ocount = viftable[vifi].v_pkt_out; 549 req->ibytes = viftable[vifi].v_bytes_in; 550 req->obytes = viftable[vifi].v_bytes_out; 551 552 return 0; 553} 554 555/* 556 * Enable multicast routing 557 */ 558static int 559ip_mrouter_init(struct socket *so, int vers) 560{ 561 if (mrtdebug) 562 log(LOG_DEBUG,"ip_mrouter_init: so_type = %d, pr_protocol = %d\n", 563 so->so_type, so->so_proto->pr_protocol); 564 565 if (so->so_type != SOCK_RAW || 566 so->so_proto->pr_protocol != IPPROTO_IGMP) return EOPNOTSUPP; 567 568 if (vers != 1) 569 return ENOPROTOOPT; 570 571 if (ip_mrouter != NULL) return EADDRINUSE; 572 573 ip_mrouter = so; 574 575 bzero((caddr_t)mfctable, sizeof(mfctable)); 576 bzero((caddr_t)nexpire, sizeof(nexpire)); 577 578 pim_assert = 0; 579 580 timeout(expire_upcalls, (caddr_t)NULL, EXPIRE_TIMEOUT); 581 582 if (mrtdebug) 583 log(LOG_DEBUG, "ip_mrouter_init\n"); 584 585 return 0; 586} 587 588/* 589 * Disable multicast routing 590 */ 591static int 592X_ip_mrouter_done(void) 593{ 594 vifi_t vifi; 595 int i; 596 struct ifnet *ifp; 597 struct ifreq ifr; 598 struct mfc *rt; 599 struct rtdetq *rte; 600 601 /* 602 * For each phyint in use, disable promiscuous reception of all IP 603 * multicasts. 604 */ 605 for (vifi = 0; vifi < numvifs; vifi++) { 606 if (viftable[vifi].v_lcl_addr.s_addr != 0 && 607 !(viftable[vifi].v_flags & VIFF_TUNNEL)) { 608 ((struct sockaddr_in *)&(ifr.ifr_addr))->sin_family = AF_INET; 609 ((struct sockaddr_in *)&(ifr.ifr_addr))->sin_addr.s_addr 610 = INADDR_ANY; 611 ifp = viftable[vifi].v_ifp; 612 if_allmulti(ifp, 0); 613 } 614 } 615 bzero((caddr_t)tbftable, sizeof(tbftable)); 616 bzero((caddr_t)viftable, sizeof(viftable)); 617 numvifs = 0; 618 pim_assert = 0; 619 620 untimeout(expire_upcalls, (caddr_t)NULL); 621 622 /* 623 * Free all multicast forwarding cache entries. 624 */ 625 for (i = 0; i < CONFIG_MFCTBLSIZ; i++) { 626 for (rt = mfctable[i]; rt != NULL; ) { 627 struct mfc *nr = rt->mfc_next; 628 629 for (rte = rt->mfc_stall; rte != NULL; ) { 630 struct rtdetq *n = rte->next; 631 632 m_freem(rte->m); 633 FREE(rte, M_MRTABLE); 634 rte = n; 635 } 636 FREE(rt, M_MRTABLE); 637 rt = nr; 638 } 639 } 640 641 bzero((caddr_t)mfctable, sizeof(mfctable)); 642 643 /* 644 * Reset de-encapsulation cache 645 */ 646 last_encap_src = 0; 647 last_encap_vif = NULL; 648 have_encap_tunnel = 0; 649 650 ip_mrouter = NULL; 651 652 if (mrtdebug) 653 log(LOG_DEBUG, "ip_mrouter_done\n"); 654 655 return 0; 656} 657 658#if !defined(MROUTE_LKM) || !MROUTE_LKM 659int (*ip_mrouter_done)(void) = X_ip_mrouter_done; 660#endif 661 662/* 663 * Set PIM assert processing global 664 */ 665static int 666set_assert(int i) 667{ 668 if ((i != 1) && (i != 0)) 669 return EINVAL; 670 671 pim_assert = i; 672 673 return 0; 674} 675 676/* 677 * Add a vif to the vif table 678 */ 679static int 680add_vif(struct vifctl *vifcp) 681{ 682 struct vif *vifp = viftable + vifcp->vifc_vifi; 683 static struct sockaddr_in sin = { sizeof sin, AF_INET, 684 0 , {0}, {0,0,0,0,0,0,0,0,} }; 685 struct ifaddr *ifa; 686 struct ifnet *ifp; 687 int error, s; 688 struct tbf *v_tbf = tbftable + vifcp->vifc_vifi; 689 690 if (vifcp->vifc_vifi >= CONFIG_MAXVIFS) return EINVAL; 691 if (vifp->v_lcl_addr.s_addr != 0) return EADDRINUSE; 692 693 /* Find the interface with an address in AF_INET family */ 694 sin.sin_addr = vifcp->vifc_lcl_addr; 695 ifa = ifa_ifwithaddr((struct sockaddr *)&sin); 696 if (ifa == 0) return EADDRNOTAVAIL; 697 ifp = ifa->ifa_ifp; 698 IFA_REMREF(ifa); 699 ifa = NULL; 700 701 if (vifcp->vifc_flags & VIFF_TUNNEL) { 702 if ((vifcp->vifc_flags & VIFF_SRCRT) == 0) { 703 /* 704 * An encapsulating tunnel is wanted. Tell ipip_input() to 705 * start paying attention to encapsulated packets. 706 */ 707 if (have_encap_tunnel == 0) { 708 have_encap_tunnel = 1; 709 for (s = 0; s < CONFIG_MAXVIFS; ++s) { 710 multicast_decap_if[s].if_name = "mdecap"; 711 multicast_decap_if[s].if_unit = s; 712 multicast_decap_if[s].if_family = APPLE_IF_FAM_MDECAP; 713 } 714 } 715 /* 716 * Set interface to fake encapsulator interface 717 */ 718 ifp = &multicast_decap_if[vifcp->vifc_vifi]; 719 } else { 720 log(LOG_ERR, "source routed tunnels not supported\n"); 721 return EOPNOTSUPP; 722 } 723 } else { 724 /* Make sure the interface supports multicast */ 725 if ((ifp->if_flags & IFF_MULTICAST) == 0) 726 return EOPNOTSUPP; 727 728 /* Enable promiscuous reception of all IP multicasts from the if */ 729 error = if_allmulti(ifp, 1); 730 if (error) 731 return error; 732 } 733 734 /* define parameters for the tbf structure */ 735 vifp->v_tbf = v_tbf; 736 GET_TIME(vifp->v_tbf->tbf_last_pkt_t); 737 vifp->v_tbf->tbf_n_tok = 0; 738 vifp->v_tbf->tbf_q_len = 0; 739 vifp->v_tbf->tbf_max_q_len = MAXQSIZE; 740 vifp->v_tbf->tbf_q = vifp->v_tbf->tbf_t = NULL; 741 742 vifp->v_flags = vifcp->vifc_flags; 743 vifp->v_threshold = vifcp->vifc_threshold; 744 vifp->v_lcl_addr = vifcp->vifc_lcl_addr; 745 vifp->v_rmt_addr = vifcp->vifc_rmt_addr; 746 vifp->v_ifp = ifp; 747 /* scaling up here allows division by 1024 in critical code */ 748 vifp->v_rate_limit= vifcp->vifc_rate_limit * 1024 / 1000; 749 vifp->v_rsvp_on = 0; 750 vifp->v_rsvpd = NULL; 751 /* initialize per vif pkt counters */ 752 vifp->v_pkt_in = 0; 753 vifp->v_pkt_out = 0; 754 vifp->v_bytes_in = 0; 755 vifp->v_bytes_out = 0; 756 757 /* Adjust numvifs up if the vifi is higher than numvifs */ 758 if (numvifs <= vifcp->vifc_vifi) numvifs = vifcp->vifc_vifi + 1; 759 760 if (mrtdebug) 761 log(LOG_DEBUG, "add_vif #%d, lcladdr %lx, %s %lx, thresh %x, rate %d\n", 762 vifcp->vifc_vifi, 763 (u_int32_t)ntohl(vifcp->vifc_lcl_addr.s_addr), 764 (vifcp->vifc_flags & VIFF_TUNNEL) ? "rmtaddr" : "mask", 765 (u_int32_t)ntohl(vifcp->vifc_rmt_addr.s_addr), 766 vifcp->vifc_threshold, 767 vifcp->vifc_rate_limit); 768 769 return 0; 770} 771 772/* 773 * Delete a vif from the vif table 774 */ 775static int 776del_vif(vifi_t vifi) 777{ 778 struct vif *vifp = &viftable[vifi]; 779 struct mbuf *m; 780 struct ifnet *ifp; 781 struct ifreq ifr; 782 783 if (vifi >= numvifs) return EINVAL; 784 if (vifp->v_lcl_addr.s_addr == 0) return EADDRNOTAVAIL; 785 786 if (!(vifp->v_flags & VIFF_TUNNEL)) { 787 ((struct sockaddr_in *)&(ifr.ifr_addr))->sin_family = AF_INET; 788 ((struct sockaddr_in *)&(ifr.ifr_addr))->sin_addr.s_addr = INADDR_ANY; 789 ifp = vifp->v_ifp; 790 if_allmulti(ifp, 0); 791 } 792 793 if (vifp == last_encap_vif) { 794 last_encap_vif = 0; 795 last_encap_src = 0; 796 } 797 798 /* 799 * Free packets queued at the interface 800 */ 801 while (vifp->v_tbf->tbf_q) { 802 m = vifp->v_tbf->tbf_q; 803 vifp->v_tbf->tbf_q = m->m_act; 804 m_freem(m); 805 } 806 807 bzero((caddr_t)vifp->v_tbf, sizeof(*(vifp->v_tbf))); 808 bzero((caddr_t)vifp, sizeof (*vifp)); 809 810 if (mrtdebug) 811 log(LOG_DEBUG, "del_vif %d, numvifs %d\n", vifi, numvifs); 812 813 /* Adjust numvifs down */ 814 for (vifi = numvifs; vifi > 0; vifi--) 815 if (viftable[vifi-1].v_lcl_addr.s_addr != 0) break; 816 numvifs = vifi; 817 818 return 0; 819} 820 821/* 822 * Add an mfc entry 823 */ 824static int 825add_mfc(struct mfcctl *mfccp) 826{ 827 struct mfc *rt; 828 u_int32_t hash; 829 struct rtdetq *rte; 830 u_short nstl; 831 int i; 832 833 MFCFIND(mfccp->mfcc_origin.s_addr, mfccp->mfcc_mcastgrp.s_addr, rt); 834 835 /* If an entry already exists, just update the fields */ 836 if (rt) { 837 if (mrtdebug & DEBUG_MFC) 838 log(LOG_DEBUG,"add_mfc update o %lx g %lx p %x\n", 839 (u_int32_t)ntohl(mfccp->mfcc_origin.s_addr), 840 (u_int32_t)ntohl(mfccp->mfcc_mcastgrp.s_addr), 841 mfccp->mfcc_parent); 842 843 rt->mfc_parent = mfccp->mfcc_parent; 844 for (i = 0; i < numvifs; i++) 845 rt->mfc_ttls[i] = mfccp->mfcc_ttls[i]; 846 return 0; 847 } 848 849 /* 850 * Find the entry for which the upcall was made and update 851 */ 852 hash = MFCHASH(mfccp->mfcc_origin.s_addr, mfccp->mfcc_mcastgrp.s_addr); 853 for (rt = mfctable[hash], nstl = 0; rt; rt = rt->mfc_next) { 854 855 if ((rt->mfc_origin.s_addr == mfccp->mfcc_origin.s_addr) && 856 (rt->mfc_mcastgrp.s_addr == mfccp->mfcc_mcastgrp.s_addr) && 857 (rt->mfc_stall != NULL)) { 858 859 if (nstl++) 860 log(LOG_ERR, "add_mfc %s o %lx g %lx p %x dbx %p\n", 861 "multiple kernel entries", 862 (u_int32_t)ntohl(mfccp->mfcc_origin.s_addr), 863 (u_int32_t)ntohl(mfccp->mfcc_mcastgrp.s_addr), 864 mfccp->mfcc_parent, (void *)rt->mfc_stall); 865 866 if (mrtdebug & DEBUG_MFC) 867 log(LOG_DEBUG,"add_mfc o %lx g %lx p %x dbg %p\n", 868 (u_int32_t)ntohl(mfccp->mfcc_origin.s_addr), 869 (u_int32_t)ntohl(mfccp->mfcc_mcastgrp.s_addr), 870 mfccp->mfcc_parent, (void *)rt->mfc_stall); 871 872 rt->mfc_origin = mfccp->mfcc_origin; 873 rt->mfc_mcastgrp = mfccp->mfcc_mcastgrp; 874 rt->mfc_parent = mfccp->mfcc_parent; 875 for (i = 0; i < numvifs; i++) 876 rt->mfc_ttls[i] = mfccp->mfcc_ttls[i]; 877 /* initialize pkt counters per src-grp */ 878 rt->mfc_pkt_cnt = 0; 879 rt->mfc_byte_cnt = 0; 880 rt->mfc_wrong_if = 0; 881 rt->mfc_last_assert.tv_sec = rt->mfc_last_assert.tv_usec = 0; 882 883 rt->mfc_expire = 0; /* Don't clean this guy up */ 884 nexpire[hash]--; 885 886 /* free packets Qed at the end of this entry */ 887 for (rte = rt->mfc_stall; rte != NULL; ) { 888 struct rtdetq *n = rte->next; 889 890 ip_mdq(rte->m, rte->ifp, rt, -1); 891 m_freem(rte->m); 892#if UPCALL_TIMING 893 collate(&(rte->t)); 894#endif /* UPCALL_TIMING */ 895 FREE(rte, M_MRTABLE); 896 rte = n; 897 } 898 rt->mfc_stall = NULL; 899 } 900 } 901 902 /* 903 * It is possible that an entry is being inserted without an upcall 904 */ 905 if (nstl == 0) { 906 if (mrtdebug & DEBUG_MFC) 907 log(LOG_DEBUG,"add_mfc no upcall h %lu o %lx g %lx p %x\n", 908 hash, (u_int32_t)ntohl(mfccp->mfcc_origin.s_addr), 909 (u_int32_t)ntohl(mfccp->mfcc_mcastgrp.s_addr), 910 mfccp->mfcc_parent); 911 912 for (rt = mfctable[hash]; rt != NULL; rt = rt->mfc_next) { 913 914 if ((rt->mfc_origin.s_addr == mfccp->mfcc_origin.s_addr) && 915 (rt->mfc_mcastgrp.s_addr == mfccp->mfcc_mcastgrp.s_addr)) { 916 917 rt->mfc_origin = mfccp->mfcc_origin; 918 rt->mfc_mcastgrp = mfccp->mfcc_mcastgrp; 919 rt->mfc_parent = mfccp->mfcc_parent; 920 for (i = 0; i < numvifs; i++) 921 rt->mfc_ttls[i] = mfccp->mfcc_ttls[i]; 922 /* initialize pkt counters per src-grp */ 923 rt->mfc_pkt_cnt = 0; 924 rt->mfc_byte_cnt = 0; 925 rt->mfc_wrong_if = 0; 926 rt->mfc_last_assert.tv_sec = rt->mfc_last_assert.tv_usec = 0; 927 if (rt->mfc_expire) 928 nexpire[hash]--; 929 rt->mfc_expire = 0; 930 } 931 } 932 if (rt == NULL) { 933 /* no upcall, so make a new entry */ 934 rt = (struct mfc *) _MALLOC(sizeof(*rt), M_MRTABLE, M_NOWAIT); 935 if (rt == NULL) { 936 return ENOBUFS; 937 } 938 939 /* insert new entry at head of hash chain */ 940 rt->mfc_origin = mfccp->mfcc_origin; 941 rt->mfc_mcastgrp = mfccp->mfcc_mcastgrp; 942 rt->mfc_parent = mfccp->mfcc_parent; 943 for (i = 0; i < numvifs; i++) 944 rt->mfc_ttls[i] = mfccp->mfcc_ttls[i]; 945 /* initialize pkt counters per src-grp */ 946 rt->mfc_pkt_cnt = 0; 947 rt->mfc_byte_cnt = 0; 948 rt->mfc_wrong_if = 0; 949 rt->mfc_last_assert.tv_sec = rt->mfc_last_assert.tv_usec = 0; 950 rt->mfc_expire = 0; 951 rt->mfc_stall = NULL; 952 953 /* link into table */ 954 rt->mfc_next = mfctable[hash]; 955 mfctable[hash] = rt; 956 } 957 } 958 return 0; 959} 960 961#if UPCALL_TIMING 962/* 963 * collect delay statistics on the upcalls 964 */ 965static void 966collate(struct timeval *t) 967{ 968 u_int32_t d; 969 struct timeval tp; 970 u_int32_t delta; 971 972 GET_TIME(tp); 973 974 if (TV_LT(*t, tp)) 975 { 976 TV_DELTA(tp, *t, delta); 977 978 d = delta >> 10; 979 if (d > 50) 980 d = 50; 981 982 ++upcall_data[d]; 983 } 984} 985#endif /* UPCALL_TIMING */ 986 987/* 988 * Delete an mfc entry 989 */ 990static int 991del_mfc(struct mfcctl *mfccp) 992{ 993 struct in_addr origin; 994 struct in_addr mcastgrp; 995 struct mfc *rt; 996 struct mfc **nptr; 997 u_int32_t hash; 998 999 origin = mfccp->mfcc_origin; 1000 mcastgrp = mfccp->mfcc_mcastgrp; 1001 hash = MFCHASH(origin.s_addr, mcastgrp.s_addr); 1002 1003 if (mrtdebug & DEBUG_MFC) 1004 log(LOG_DEBUG,"del_mfc orig %lx mcastgrp %lx\n", 1005 (u_int32_t)ntohl(origin.s_addr), (u_int32_t)ntohl(mcastgrp.s_addr)); 1006 1007 nptr = &mfctable[hash]; 1008 while ((rt = *nptr) != NULL) { 1009 if (origin.s_addr == rt->mfc_origin.s_addr && 1010 mcastgrp.s_addr == rt->mfc_mcastgrp.s_addr && 1011 rt->mfc_stall == NULL) 1012 break; 1013 1014 nptr = &rt->mfc_next; 1015 } 1016 if (rt == NULL) { 1017 return EADDRNOTAVAIL; 1018 } 1019 1020 *nptr = rt->mfc_next; 1021 FREE(rt, M_MRTABLE); 1022 1023 return 0; 1024} 1025 1026/* 1027 * Send a message to mrouted on the multicast routing socket 1028 */ 1029static int 1030socket_send(struct socket *s, struct mbuf *mm, struct sockaddr_in *src) 1031{ 1032 socket_lock(s, 1); 1033 if (s) { 1034 if (sbappendaddr(&s->so_rcv, 1035 (struct sockaddr *)src, 1036 mm, (struct mbuf *)0, NULL) != 0) { 1037 sorwakeup(s); 1038 socket_unlock(s, 1); 1039 return 0; 1040 } 1041 } 1042 socket_unlock(s, 1); 1043 m_freem(mm); 1044 return -1; 1045} 1046 1047/* 1048 * IP multicast forwarding function. This function assumes that the packet 1049 * pointed to by "ip" has arrived on (or is about to be sent to) the interface 1050 * pointed to by "ifp", and the packet is to be relayed to other networks 1051 * that have members of the packet's destination IP multicast group. 1052 * 1053 * The packet is returned unscathed to the caller, unless it is 1054 * erroneous, in which case a non-zero return value tells the caller to 1055 * discard it. 1056 */ 1057 1058#define IP_HDR_LEN 20 /* # bytes of fixed IP header (excluding options) */ 1059#define TUNNEL_LEN 12 /* # bytes of IP option for tunnel encapsulation */ 1060 1061static int 1062X_ip_mforward(struct ip *ip, struct ifnet *ifp, struct mbuf *m, 1063 struct ip_moptions *imo) 1064{ 1065 struct mfc *rt; 1066 u_char *ipoptions; 1067 static struct sockaddr_in k_igmpsrc = { sizeof k_igmpsrc, AF_INET, 1068 0 , {0}, {0,0,0,0,0,0,0,0,} }; 1069 static int srctun = 0; 1070 struct mbuf *mm; 1071 vifi_t vifi; 1072 struct vif *vifp; 1073 1074 if (mrtdebug & DEBUG_FORWARD) 1075 log(LOG_DEBUG, "ip_mforward: src %lx, dst %lx, ifp %p\n", 1076 (u_int32_t)ntohl(ip->ip_src.s_addr), (u_int32_t)ntohl(ip->ip_dst.s_addr), 1077 (void *)ifp); 1078 1079 if (ip->ip_hl < (IP_HDR_LEN + TUNNEL_LEN) >> 2 || 1080 (ipoptions = (u_char *)(ip + 1))[1] != IPOPT_LSRR ) { 1081 /* 1082 * Packet arrived via a physical interface or 1083 * an encapsulated tunnel. 1084 */ 1085 } else { 1086 /* 1087 * Packet arrived through a source-route tunnel. 1088 * Source-route tunnels are no longer supported. 1089 */ 1090 if ((srctun++ % 1000) == 0) 1091 log(LOG_ERR, 1092 "ip_mforward: received source-routed packet from %lx\n", 1093 (u_int32_t)ntohl(ip->ip_src.s_addr)); 1094 1095 return 1; 1096 } 1097 1098 if (imo != NULL) 1099 IMO_LOCK(imo); 1100 if ((imo) && ((vifi = imo->imo_multicast_vif) < numvifs)) { 1101 IMO_UNLOCK(imo); 1102 if (ip->ip_ttl < 255) 1103 ip->ip_ttl++; /* compensate for -1 in *_send routines */ 1104 if (rsvpdebug && ip->ip_p == IPPROTO_RSVP) { 1105 vifp = viftable + vifi; 1106 printf("Sending IPPROTO_RSVP from %x to %x on vif %d (%s%s)\n", 1107 ntohl(ip->ip_src.s_addr), ntohl(ip->ip_dst.s_addr), vifi, 1108 (vifp->v_flags & VIFF_TUNNEL) ? "tunnel on " : "", 1109 if_name(vifp->v_ifp)); 1110 } 1111 return (ip_mdq(m, ifp, NULL, vifi)); 1112 } else if (imo != NULL) { 1113 IMO_UNLOCK(imo); 1114 } 1115 if (rsvpdebug && ip->ip_p == IPPROTO_RSVP) { 1116 printf("Warning: IPPROTO_RSVP from %x to %x without vif option\n", 1117 ntohl(ip->ip_src.s_addr), ntohl(ip->ip_dst.s_addr)); 1118 if(!imo) 1119 printf("In fact, no options were specified at all\n"); 1120 } 1121 1122 /* 1123 * Don't forward a packet with time-to-live of zero or one, 1124 * or a packet destined to a local-only group. 1125 */ 1126 if (ip->ip_ttl <= 1 || 1127 ntohl(ip->ip_dst.s_addr) <= INADDR_MAX_LOCAL_GROUP) 1128 return 0; 1129 1130 /* 1131 * Determine forwarding vifs from the forwarding cache table 1132 */ 1133 MFCFIND(ip->ip_src.s_addr, ip->ip_dst.s_addr, rt); 1134 1135 /* Entry exists, so forward if necessary */ 1136 if (rt != NULL) { 1137 return (ip_mdq(m, ifp, rt, -1)); 1138 } else { 1139 /* 1140 * If we don't have a route for packet's origin, 1141 * Make a copy of the packet & 1142 * send message to routing daemon 1143 */ 1144 1145 struct mbuf *mb0; 1146 struct rtdetq *rte; 1147 u_int32_t hash; 1148 int hlen = ip->ip_hl << 2; 1149#if UPCALL_TIMING 1150 struct timeval tp; 1151 1152 GET_TIME(tp); 1153#endif 1154 1155 mrtstat.mrts_no_route++; 1156 if (mrtdebug & (DEBUG_FORWARD | DEBUG_MFC)) 1157 log(LOG_DEBUG, "ip_mforward: no rte s %lx g %lx\n", 1158 (u_int32_t)ntohl(ip->ip_src.s_addr), 1159 (u_int32_t)ntohl(ip->ip_dst.s_addr)); 1160 1161 /* 1162 * Allocate mbufs early so that we don't do extra work if we are 1163 * just going to fail anyway. Make sure to pullup the header so 1164 * that other people can't step on it. 1165 */ 1166 rte = (struct rtdetq *) _MALLOC((sizeof *rte), M_MRTABLE, M_NOWAIT); 1167 if (rte == NULL) { 1168 return ENOBUFS; 1169 } 1170 mb0 = m_copy(m, 0, M_COPYALL); 1171 if (mb0 && (M_HASCL(mb0) || mb0->m_len < hlen)) 1172 mb0 = m_pullup(mb0, hlen); 1173 if (mb0 == NULL) { 1174 FREE(rte, M_MRTABLE); 1175 return ENOBUFS; 1176 } 1177 1178 /* is there an upcall waiting for this packet? */ 1179 hash = MFCHASH(ip->ip_src.s_addr, ip->ip_dst.s_addr); 1180 for (rt = mfctable[hash]; rt; rt = rt->mfc_next) { 1181 if ((ip->ip_src.s_addr == rt->mfc_origin.s_addr) && 1182 (ip->ip_dst.s_addr == rt->mfc_mcastgrp.s_addr) && 1183 (rt->mfc_stall != NULL)) 1184 break; 1185 } 1186 1187 if (rt == NULL) { 1188 int i; 1189 struct igmpmsg *im; 1190 1191 /* no upcall, so make a new entry */ 1192 rt = (struct mfc *) _MALLOC(sizeof(*rt), M_MRTABLE, M_NOWAIT); 1193 if (rt == NULL) { 1194 FREE(rte, M_MRTABLE); 1195 m_freem(mb0); 1196 return ENOBUFS; 1197 } 1198 /* Make a copy of the header to send to the user level process */ 1199 mm = m_copy(mb0, 0, hlen); 1200 if (mm == NULL) { 1201 FREE(rte, M_MRTABLE); 1202 m_freem(mb0); 1203 FREE(rt, M_MRTABLE); 1204 return ENOBUFS; 1205 } 1206 1207 /* 1208 * Send message to routing daemon to install 1209 * a route into the kernel table 1210 */ 1211 k_igmpsrc.sin_addr = ip->ip_src; 1212 1213 im = mtod(mm, struct igmpmsg *); 1214 im->im_msgtype = IGMPMSG_NOCACHE; 1215 im->im_mbz = 0; 1216 1217 mrtstat.mrts_upcalls++; 1218 1219 if (socket_send(ip_mrouter, mm, &k_igmpsrc) < 0) { 1220 log(LOG_WARNING, "ip_mforward: ip_mrouter socket queue full\n"); 1221 ++mrtstat.mrts_upq_sockfull; 1222 FREE(rte, M_MRTABLE); 1223 m_freem(mb0); 1224 FREE(rt, M_MRTABLE); 1225 return ENOBUFS; 1226 } 1227 1228 /* insert new entry at head of hash chain */ 1229 rt->mfc_origin.s_addr = ip->ip_src.s_addr; 1230 rt->mfc_mcastgrp.s_addr = ip->ip_dst.s_addr; 1231 rt->mfc_expire = UPCALL_EXPIRE; 1232 nexpire[hash]++; 1233 for (i = 0; i < numvifs; i++) 1234 rt->mfc_ttls[i] = 0; 1235 rt->mfc_parent = -1; 1236 1237 /* link into table */ 1238 rt->mfc_next = mfctable[hash]; 1239 mfctable[hash] = rt; 1240 rt->mfc_stall = rte; 1241 1242 } else { 1243 /* determine if q has overflowed */ 1244 int npkts = 0; 1245 struct rtdetq **p; 1246 1247 for (p = &rt->mfc_stall; *p != NULL; p = &(*p)->next) 1248 npkts++; 1249 1250 if (npkts > MAX_UPQ) { 1251 mrtstat.mrts_upq_ovflw++; 1252 FREE(rte, M_MRTABLE); 1253 m_freem(mb0); 1254 return 0; 1255 } 1256 1257 /* Add this entry to the end of the queue */ 1258 *p = rte; 1259 } 1260 1261 rte->m = mb0; 1262 rte->ifp = ifp; 1263#if UPCALL_TIMING 1264 rte->t = tp; 1265#endif 1266 rte->next = NULL; 1267 1268 return 0; 1269 } 1270} 1271 1272#if !defined(MROUTE_LKM) || !MROUTE_LKM 1273int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *, 1274 struct ip_moptions *) = X_ip_mforward; 1275#endif 1276 1277/* 1278 * Clean up the cache entry if upcall is not serviced 1279 */ 1280static void 1281expire_upcalls(__unused void *unused) 1282{ 1283 struct rtdetq *rte; 1284 struct mfc *mfc, **nptr; 1285 int i; 1286 1287 for (i = 0; i < CONFIG_MFCTBLSIZ; i++) { 1288 if (nexpire[i] == 0) 1289 continue; 1290 nptr = &mfctable[i]; 1291 for (mfc = *nptr; mfc != NULL; mfc = *nptr) { 1292 /* 1293 * Skip real cache entries 1294 * Make sure it wasn't marked to not expire (shouldn't happen) 1295 * If it expires now 1296 */ 1297 if (mfc->mfc_stall != NULL && 1298 mfc->mfc_expire != 0 && 1299 --mfc->mfc_expire == 0) { 1300 if (mrtdebug & DEBUG_EXPIRE) 1301 log(LOG_DEBUG, "expire_upcalls: expiring (%lx %lx)\n", 1302 (u_int32_t)ntohl(mfc->mfc_origin.s_addr), 1303 (u_int32_t)ntohl(mfc->mfc_mcastgrp.s_addr)); 1304 /* 1305 * drop all the packets 1306 * free the mbuf with the pkt, if, timing info 1307 */ 1308 for (rte = mfc->mfc_stall; rte; ) { 1309 struct rtdetq *n = rte->next; 1310 1311 m_freem(rte->m); 1312 FREE(rte, M_MRTABLE); 1313 rte = n; 1314 } 1315 ++mrtstat.mrts_cache_cleanups; 1316 nexpire[i]--; 1317 1318 *nptr = mfc->mfc_next; 1319 FREE(mfc, M_MRTABLE); 1320 } else { 1321 nptr = &mfc->mfc_next; 1322 } 1323 } 1324 } 1325 timeout(expire_upcalls, (caddr_t)NULL, EXPIRE_TIMEOUT); 1326} 1327 1328/* 1329 * Packet forwarding routine once entry in the cache is made 1330 */ 1331static int 1332ip_mdq(struct mbuf *m, struct ifnet *ifp, struct mfc *rt, 1333 vifi_t xmt_vif) 1334{ 1335 struct ip *ip = mtod(m, struct ip *); 1336 vifi_t vifi; 1337 struct vif *vifp; 1338 int plen = ip->ip_len; 1339 1340/* 1341 * Macro to send packet on vif. Since RSVP packets don't get counted on 1342 * input, they shouldn't get counted on output, so statistics keeping is 1343 * seperate. 1344 */ 1345#define MC_SEND(ip,vifp,m) { \ 1346 if ((vifp)->v_flags & VIFF_TUNNEL) \ 1347 encap_send((ip), (vifp), (m)); \ 1348 else \ 1349 phyint_send((ip), (vifp), (m)); \ 1350} 1351 1352 /* 1353 * If xmt_vif is not -1, send on only the requested vif. 1354 * 1355 * (since vifi_t is u_short, -1 becomes MAXUSHORT, which > numvifs.) 1356 */ 1357 if (xmt_vif < numvifs) { 1358 MC_SEND(ip, viftable + xmt_vif, m); 1359 return 1; 1360 } 1361 1362 /* 1363 * Don't forward if it didn't arrive from the parent vif for its origin. 1364 */ 1365 vifi = rt->mfc_parent; 1366 if ((vifi >= numvifs) || (viftable[vifi].v_ifp != ifp)) { 1367 /* came in the wrong interface */ 1368 if (mrtdebug & DEBUG_FORWARD) 1369 log(LOG_DEBUG, "wrong if: ifp %p vifi %d vififp %p\n", 1370 (void *)ifp, vifi, (void *)viftable[vifi].v_ifp); 1371 ++mrtstat.mrts_wrong_if; 1372 ++rt->mfc_wrong_if; 1373 /* 1374 * If we are doing PIM assert processing, and we are forwarding 1375 * packets on this interface, and it is a broadcast medium 1376 * interface (and not a tunnel), send a message to the routing daemon. 1377 */ 1378 if (pim_assert && rt->mfc_ttls[vifi] && 1379 (ifp->if_flags & IFF_BROADCAST) && 1380 !(viftable[vifi].v_flags & VIFF_TUNNEL)) { 1381 struct sockaddr_in k_igmpsrc; 1382 struct mbuf *mm; 1383 struct igmpmsg *im; 1384 int hlen = ip->ip_hl << 2; 1385 struct timeval now; 1386 u_int32_t delta; 1387 1388 GET_TIME(now); 1389 1390 TV_DELTA(rt->mfc_last_assert, now, delta); 1391 1392 if (delta > ASSERT_MSG_TIME) { 1393 mm = m_copy(m, 0, hlen); 1394 if (mm && (M_HASCL(mm) || mm->m_len < hlen)) 1395 mm = m_pullup(mm, hlen); 1396 if (mm == NULL) { 1397 return ENOBUFS; 1398 } 1399 1400 rt->mfc_last_assert = now; 1401 1402 im = mtod(mm, struct igmpmsg *); 1403 im->im_msgtype = IGMPMSG_WRONGVIF; 1404 im->im_mbz = 0; 1405 im->im_vif = vifi; 1406 1407 k_igmpsrc.sin_addr = im->im_src; 1408 1409 socket_send(ip_mrouter, mm, &k_igmpsrc); 1410 } 1411 } 1412 return 0; 1413 } 1414 1415 /* If I sourced this packet, it counts as output, else it was input. */ 1416 if (ip->ip_src.s_addr == viftable[vifi].v_lcl_addr.s_addr) { 1417 viftable[vifi].v_pkt_out++; 1418 viftable[vifi].v_bytes_out += plen; 1419 } else { 1420 viftable[vifi].v_pkt_in++; 1421 viftable[vifi].v_bytes_in += plen; 1422 } 1423 rt->mfc_pkt_cnt++; 1424 rt->mfc_byte_cnt += plen; 1425 1426 /* 1427 * For each vif, decide if a copy of the packet should be forwarded. 1428 * Forward if: 1429 * - the ttl exceeds the vif's threshold 1430 * - there are group members downstream on interface 1431 */ 1432 for (vifp = viftable, vifi = 0; vifi < numvifs; vifp++, vifi++) 1433 if ((rt->mfc_ttls[vifi] > 0) && 1434 (ip->ip_ttl > rt->mfc_ttls[vifi])) { 1435 vifp->v_pkt_out++; 1436 vifp->v_bytes_out += plen; 1437 MC_SEND(ip, vifp, m); 1438 } 1439 1440 return 0; 1441} 1442 1443/* 1444 * check if a vif number is legal/ok. This is used by ip_output, to export 1445 * numvifs there, 1446 */ 1447static int 1448X_legal_vif_num(int vif) 1449{ 1450 if (vif >= 0 && vif < numvifs) 1451 return(1); 1452 else 1453 return(0); 1454} 1455 1456#if !defined(MROUTE_LKM) || !MROUTE_LKM 1457int (*legal_vif_num)(int) = X_legal_vif_num; 1458#endif 1459 1460/* 1461 * Return the local address used by this vif 1462 */ 1463static u_int32_t 1464X_ip_mcast_src(int vifi) 1465{ 1466 if (vifi >= 0 && vifi < numvifs) 1467 return viftable[vifi].v_lcl_addr.s_addr; 1468 else 1469 return INADDR_ANY; 1470} 1471 1472#if !defined(MROUTE_LKM) || !MROUTE_LKM 1473u_int32_t (*ip_mcast_src)(int) = X_ip_mcast_src; 1474#endif 1475 1476static void 1477phyint_send(struct ip *ip, struct vif *vifp, struct mbuf *m) 1478{ 1479 struct mbuf *mb_copy; 1480 int hlen = ip->ip_hl << 2; 1481 1482 /* 1483 * Make a new reference to the packet; make sure that 1484 * the IP header is actually copied, not just referenced, 1485 * so that ip_output() only scribbles on the copy. 1486 */ 1487 mb_copy = m_copy(m, 0, M_COPYALL); 1488 if (mb_copy && (M_HASCL(mb_copy) || mb_copy->m_len < hlen)) 1489 mb_copy = m_pullup(mb_copy, hlen); 1490 if (mb_copy == NULL) 1491 return; 1492 1493 if (vifp->v_rate_limit == 0) 1494 tbf_send_packet(vifp, mb_copy); 1495 else 1496 tbf_control(vifp, mb_copy, mtod(mb_copy, struct ip *), ip->ip_len); 1497} 1498 1499static void 1500encap_send(struct ip *ip, struct vif *vifp, struct mbuf *m) 1501{ 1502 struct mbuf *mb_copy; 1503 struct ip *ip_copy; 1504 int i, len = ip->ip_len; 1505 1506 /* 1507 * copy the old packet & pullup its IP header into the 1508 * new mbuf so we can modify it. Try to fill the new 1509 * mbuf since if we don't the ethernet driver will. 1510 */ 1511 MGETHDR(mb_copy, M_DONTWAIT, MT_HEADER); 1512 if (mb_copy == NULL) 1513 return; 1514#if CONFIG_MACF_NET 1515 mac_mbuf_label_associate_multicast_encap(m, vifp->v_ifp, mb_copy); 1516#endif 1517 mb_copy->m_data += max_linkhdr; 1518 mb_copy->m_len = sizeof(multicast_encap_iphdr); 1519 1520 if ((mb_copy->m_next = m_copy(m, 0, M_COPYALL)) == NULL) { 1521 m_freem(mb_copy); 1522 return; 1523 } 1524 i = MHLEN - M_LEADINGSPACE(mb_copy); 1525 if (i > len) 1526 i = len; 1527 mb_copy = m_pullup(mb_copy, i); 1528 if (mb_copy == NULL) 1529 return; 1530 mb_copy->m_pkthdr.len = len + sizeof(multicast_encap_iphdr); 1531 1532 /* 1533 * fill in the encapsulating IP header. 1534 */ 1535 ip_copy = mtod(mb_copy, struct ip *); 1536 *ip_copy = multicast_encap_iphdr; 1537 ip_copy->ip_id = ip_randomid(); 1538 ip_copy->ip_len += len; 1539 ip_copy->ip_src = vifp->v_lcl_addr; 1540 ip_copy->ip_dst = vifp->v_rmt_addr; 1541 1542 /* 1543 * turn the encapsulated IP header back into a valid one. 1544 */ 1545 ip = (struct ip *)((caddr_t)ip_copy + sizeof(multicast_encap_iphdr)); 1546 --ip->ip_ttl; 1547 1548#if BYTE_ORDER != BIG_ENDIAN 1549 HTONS(ip->ip_len); 1550 HTONS(ip->ip_off); 1551#endif 1552 1553 ip->ip_sum = 0; 1554 mb_copy->m_data += sizeof(multicast_encap_iphdr); 1555 ip->ip_sum = in_cksum(mb_copy, ip->ip_hl << 2); 1556 mb_copy->m_data -= sizeof(multicast_encap_iphdr); 1557 1558 if (vifp->v_rate_limit == 0) 1559 tbf_send_packet(vifp, mb_copy); 1560 else 1561 tbf_control(vifp, mb_copy, ip, ip_copy->ip_len); 1562} 1563 1564/* 1565 * De-encapsulate a packet and feed it back through ip input (this 1566 * routine is called whenever IP gets a packet with proto type 1567 * ENCAP_PROTO and a local destination address). 1568 */ 1569void 1570#if MROUTE_LKM 1571X_ipip_input(struct mbuf *m, int iphlen) 1572#else 1573ipip_input(struct mbuf *m, int iphlen) 1574#endif 1575{ 1576 struct ifnet *ifp = m->m_pkthdr.rcvif; 1577 struct ip *ip = mtod(m, struct ip *); 1578 int hlen = ip->ip_hl << 2; 1579 struct vif *vifp; 1580 1581 if (!have_encap_tunnel) { 1582 rip_input(m, iphlen); 1583 return; 1584 } 1585 /* 1586 * dump the packet if it's not to a multicast destination or if 1587 * we don't have an encapsulating tunnel with the source. 1588 * Note: This code assumes that the remote site IP address 1589 * uniquely identifies the tunnel (i.e., that this site has 1590 * at most one tunnel with the remote site). 1591 */ 1592 if (! IN_MULTICAST(ntohl(((struct ip *)((char *)ip + hlen))->ip_dst.s_addr))) { 1593 ++mrtstat.mrts_bad_tunnel; 1594 m_freem(m); 1595 return; 1596 } 1597 if (ip->ip_src.s_addr != last_encap_src) { 1598 struct vif *vife; 1599 1600 vifp = viftable; 1601 vife = vifp + numvifs; 1602 last_encap_src = ip->ip_src.s_addr; 1603 last_encap_vif = 0; 1604 for ( ; vifp < vife; ++vifp) 1605 if (vifp->v_rmt_addr.s_addr == ip->ip_src.s_addr) { 1606 if ((vifp->v_flags & (VIFF_TUNNEL|VIFF_SRCRT)) 1607 == VIFF_TUNNEL) 1608 last_encap_vif = vifp; 1609 break; 1610 } 1611 } 1612 if ((vifp = last_encap_vif) == 0) { 1613 last_encap_src = 0; 1614 mrtstat.mrts_cant_tunnel++; /*XXX*/ 1615 m_freem(m); 1616 if (mrtdebug) 1617 log(LOG_DEBUG, "ip_mforward: no tunnel with %lx\n", 1618 (u_int32_t)ntohl(ip->ip_src.s_addr)); 1619 return; 1620 } 1621 ifp = vifp->v_ifp; 1622 1623 if (hlen > IP_HDR_LEN) 1624 ip_stripoptions(m, (struct mbuf *) 0); 1625 m->m_data += IP_HDR_LEN; 1626 m->m_len -= IP_HDR_LEN; 1627 m->m_pkthdr.len -= IP_HDR_LEN; 1628 m->m_pkthdr.rcvif = ifp; 1629 1630 proto_inject(PF_INET, m); 1631} 1632 1633/* 1634 * Token bucket filter module 1635 */ 1636 1637static void 1638tbf_control(struct vif *vifp, struct mbuf *m, struct ip *ip, 1639 u_int32_t p_len) 1640{ 1641 struct tbf *t = vifp->v_tbf; 1642 1643 if (p_len > MAX_BKT_SIZE) { 1644 /* drop if packet is too large */ 1645 mrtstat.mrts_pkt2large++; 1646 m_freem(m); 1647 return; 1648 } 1649 1650 tbf_update_tokens(vifp); 1651 1652 /* if there are enough tokens, 1653 * and the queue is empty, 1654 * send this packet out 1655 */ 1656 1657 if (t->tbf_q_len == 0) { 1658 /* queue empty, send packet if enough tokens */ 1659 if (p_len <= t->tbf_n_tok) { 1660 t->tbf_n_tok -= p_len; 1661 tbf_send_packet(vifp, m); 1662 } else { 1663 /* queue packet and timeout till later */ 1664 tbf_queue(vifp, m); 1665 timeout(tbf_reprocess_q, (caddr_t)vifp, TBF_REPROCESS); 1666 } 1667 } else if (t->tbf_q_len < t->tbf_max_q_len) { 1668 /* finite queue length, so queue pkts and process queue */ 1669 tbf_queue(vifp, m); 1670 tbf_process_q(vifp); 1671 } else { 1672 /* queue length too much, try to dq and queue and process */ 1673 if (!tbf_dq_sel(vifp, ip)) { 1674 mrtstat.mrts_q_overflow++; 1675 m_freem(m); 1676 return; 1677 } else { 1678 tbf_queue(vifp, m); 1679 tbf_process_q(vifp); 1680 } 1681 } 1682 return; 1683} 1684 1685/* 1686 * adds a packet to the queue at the interface 1687 */ 1688static void 1689tbf_queue(struct vif *vifp, struct mbuf *m) 1690{ 1691 struct tbf *t = vifp->v_tbf; 1692 1693 if (t->tbf_t == NULL) { 1694 /* Queue was empty */ 1695 t->tbf_q = m; 1696 } else { 1697 /* Insert at tail */ 1698 t->tbf_t->m_act = m; 1699 } 1700 1701 /* Set new tail pointer */ 1702 t->tbf_t = m; 1703 1704#if DIAGNOSTIC 1705 /* Make sure we didn't get fed a bogus mbuf */ 1706 if (m->m_act) 1707 panic("tbf_queue: m_act"); 1708#endif 1709 m->m_act = NULL; 1710 1711 t->tbf_q_len++; 1712} 1713 1714 1715/* 1716 * processes the queue at the interface 1717 */ 1718static void 1719tbf_process_q(struct vif *vifp) 1720{ 1721 struct mbuf *m; 1722 int len; 1723 struct tbf *t = vifp->v_tbf; 1724 1725 /* loop through the queue at the interface and send as many packets 1726 * as possible 1727 */ 1728 while (t->tbf_q_len > 0) { 1729 m = t->tbf_q; 1730 1731 len = mtod(m, struct ip *)->ip_len; 1732 1733 /* determine if the packet can be sent */ 1734 if (len <= t->tbf_n_tok) { 1735 /* if so, 1736 * reduce no of tokens, dequeue the packet, 1737 * send the packet. 1738 */ 1739 t->tbf_n_tok -= len; 1740 1741 t->tbf_q = m->m_act; 1742 if (--t->tbf_q_len == 0) 1743 t->tbf_t = NULL; 1744 1745 m->m_act = NULL; 1746 tbf_send_packet(vifp, m); 1747 1748 } else break; 1749 } 1750} 1751 1752static void 1753tbf_reprocess_q(void *xvifp) 1754{ 1755 struct vif *vifp = xvifp; 1756 1757 if (ip_mrouter == NULL) { 1758 return; 1759 } 1760 1761 tbf_update_tokens(vifp); 1762 1763 tbf_process_q(vifp); 1764 1765 if (vifp->v_tbf->tbf_q_len) 1766 timeout(tbf_reprocess_q, (caddr_t)vifp, TBF_REPROCESS); 1767} 1768 1769/* function that will selectively discard a member of the queue 1770 * based on the precedence value and the priority 1771 */ 1772static int 1773tbf_dq_sel(struct vif *vifp, struct ip *ip) 1774{ 1775 u_int p; 1776 struct mbuf *m, *last; 1777 struct mbuf **np; 1778 struct tbf *t = vifp->v_tbf; 1779 1780 p = priority(vifp, ip); 1781 1782 np = &t->tbf_q; 1783 last = NULL; 1784 while ((m = *np) != NULL) { 1785 if (p > priority(vifp, mtod(m, struct ip *))) { 1786 *np = m->m_act; 1787 /* If we're removing the last packet, fix the tail pointer */ 1788 if (m == t->tbf_t) 1789 t->tbf_t = last; 1790 m_freem(m); 1791 /* it's impossible for the queue to be empty, but 1792 * we check anyway. */ 1793 if (--t->tbf_q_len == 0) 1794 t->tbf_t = NULL; 1795 mrtstat.mrts_drop_sel++; 1796 return(1); 1797 } 1798 np = &m->m_act; 1799 last = m; 1800 } 1801 return(0); 1802} 1803 1804static void 1805tbf_send_packet(struct vif *vifp, struct mbuf *m) 1806{ 1807 int error; 1808 struct route ro; 1809 1810 bzero(&ro, sizeof (ro)); 1811 if (vifp->v_flags & VIFF_TUNNEL) { 1812 /* If tunnel options */ 1813 ip_output(m, (struct mbuf *)0, &ro, 1814 IP_FORWARDING, (struct ip_moptions *)0, NULL); 1815 } else { 1816 struct ip_moptions *imo; 1817 1818 imo = ip_allocmoptions(M_DONTWAIT); 1819 if (imo == NULL) { 1820 error = ENOMEM; 1821 goto done; 1822 } 1823 1824 imo->imo_multicast_ifp = vifp->v_ifp; 1825 imo->imo_multicast_ttl = mtod(m, struct ip *)->ip_ttl - 1; 1826 imo->imo_multicast_loop = 1; 1827 imo->imo_multicast_vif = -1; 1828 1829 /* 1830 * Re-entrancy should not be a problem here, because 1831 * the packets that we send out and are looped back at us 1832 * should get rejected because they appear to come from 1833 * the loopback interface, thus preventing looping. 1834 */ 1835 error = ip_output(m, (struct mbuf *)0, &ro, 1836 IP_FORWARDING, imo, NULL); 1837 1838 IMO_REMREF(imo); 1839done: 1840 if (mrtdebug & DEBUG_XMIT) 1841 log(LOG_DEBUG, "phyint_send on vif %d err %d\n", 1842 vifp - viftable, error); 1843 } 1844 ROUTE_RELEASE(&ro); 1845} 1846 1847/* determine the current time and then 1848 * the elapsed time (between the last time and time now) 1849 * in milliseconds & update the no. of tokens in the bucket 1850 */ 1851static void 1852tbf_update_tokens(struct vif *vifp) 1853{ 1854 struct timeval tp; 1855 u_int32_t tm; 1856 struct tbf *t = vifp->v_tbf; 1857 1858 GET_TIME(tp); 1859 1860 TV_DELTA(tp, t->tbf_last_pkt_t, tm); 1861 1862 /* 1863 * This formula is actually 1864 * "time in seconds" * "bytes/second". 1865 * 1866 * (tm / 1000000) * (v_rate_limit * 1000 * (1000/1024) / 8) 1867 * 1868 * The (1000/1024) was introduced in add_vif to optimize 1869 * this divide into a shift. 1870 */ 1871 t->tbf_n_tok += tm * vifp->v_rate_limit / 1024 / 8; 1872 t->tbf_last_pkt_t = tp; 1873 1874 if (t->tbf_n_tok > MAX_BKT_SIZE) 1875 t->tbf_n_tok = MAX_BKT_SIZE; 1876} 1877 1878static int 1879priority(__unused struct vif *vifp, struct ip *ip) 1880{ 1881 int prio; 1882 1883 /* temporary hack; may add general packet classifier some day */ 1884 1885 /* 1886 * The UDP port space is divided up into four priority ranges: 1887 * [0, 16384) : unclassified - lowest priority 1888 * [16384, 32768) : audio - highest priority 1889 * [32768, 49152) : whiteboard - medium priority 1890 * [49152, 65536) : video - low priority 1891 */ 1892 if (ip->ip_p == IPPROTO_UDP) { 1893 struct udphdr *udp = (struct udphdr *)(((char *)ip) + (ip->ip_hl << 2)); 1894 switch (ntohs(udp->uh_dport) & 0xc000) { 1895 case 0x4000: 1896 prio = 70; 1897 break; 1898 case 0x8000: 1899 prio = 60; 1900 break; 1901 case 0xc000: 1902 prio = 55; 1903 break; 1904 default: 1905 prio = 50; 1906 break; 1907 } 1908 if (tbfdebug > 1) 1909 log(LOG_DEBUG, "port %x prio%d\n", ntohs(udp->uh_dport), prio); 1910 } else { 1911 prio = 50; 1912 } 1913 return prio; 1914} 1915 1916/* 1917 * End of token bucket filter modifications 1918 */ 1919 1920int 1921ip_rsvp_vif_init(struct socket *so, struct sockopt *sopt) 1922{ 1923 int error, i; 1924 1925 if (rsvpdebug) 1926 printf("ip_rsvp_vif_init: so_type = %d, pr_protocol = %d\n", 1927 so->so_type, so->so_proto->pr_protocol); 1928 1929 if (so->so_type != SOCK_RAW || so->so_proto->pr_protocol != IPPROTO_RSVP) 1930 return EOPNOTSUPP; 1931 1932 /* Check mbuf. */ 1933 error = sooptcopyin(sopt, &i, sizeof i, sizeof i); 1934 if (error) 1935 return (error); 1936 1937 if (rsvpdebug) 1938 printf("ip_rsvp_vif_init: vif = %d rsvp_on = %d\n", i, rsvp_on); 1939 1940 /* Check vif. */ 1941 if (!legal_vif_num(i)) { 1942 return EADDRNOTAVAIL; 1943 } 1944 1945 /* Check if socket is available. */ 1946 if (viftable[i].v_rsvpd != NULL) { 1947 return EADDRINUSE; 1948 } 1949 1950 viftable[i].v_rsvpd = so; 1951 /* This may seem silly, but we need to be sure we don't over-increment 1952 * the RSVP counter, in case something slips up. 1953 */ 1954 if (!viftable[i].v_rsvp_on) { 1955 viftable[i].v_rsvp_on = 1; 1956 rsvp_on++; 1957 } 1958 1959 return 0; 1960} 1961 1962int 1963ip_rsvp_vif_done(struct socket *so, struct sockopt *sopt) 1964{ 1965 int error, i; 1966 1967 if (rsvpdebug) 1968 printf("ip_rsvp_vif_done: so_type = %d, pr_protocol = %d\n", 1969 so->so_type, so->so_proto->pr_protocol); 1970 1971 if (so->so_type != SOCK_RAW || 1972 so->so_proto->pr_protocol != IPPROTO_RSVP) 1973 return EOPNOTSUPP; 1974 1975 error = sooptcopyin(sopt, &i, sizeof i, sizeof i); 1976 if (error) 1977 return (error); 1978 1979 /* Check vif. */ 1980 if (!legal_vif_num(i)) { 1981 return EADDRNOTAVAIL; 1982 } 1983 1984 if (rsvpdebug) 1985 printf("ip_rsvp_vif_done: v_rsvpd = %p so = %p\n", 1986 viftable[i].v_rsvpd, so); 1987 1988 viftable[i].v_rsvpd = NULL; 1989 /* 1990 * This may seem silly, but we need to be sure we don't over-decrement 1991 * the RSVP counter, in case something slips up. 1992 */ 1993 if (viftable[i].v_rsvp_on) { 1994 viftable[i].v_rsvp_on = 0; 1995 rsvp_on--; 1996 } 1997 1998 return 0; 1999} 2000 2001void 2002ip_rsvp_force_done(struct socket *so) 2003{ 2004 int vifi; 2005 2006 /* Don't bother if it is not the right type of socket. */ 2007 if (so->so_type != SOCK_RAW || so->so_proto->pr_protocol != IPPROTO_RSVP) 2008 return; 2009 2010 /* The socket may be attached to more than one vif...this 2011 * is perfectly legal. 2012 */ 2013 for (vifi = 0; vifi < numvifs; vifi++) { 2014 if (viftable[vifi].v_rsvpd == so) { 2015 viftable[vifi].v_rsvpd = NULL; 2016 /* This may seem silly, but we need to be sure we don't 2017 * over-decrement the RSVP counter, in case something slips up. 2018 */ 2019 if (viftable[vifi].v_rsvp_on) { 2020 viftable[vifi].v_rsvp_on = 0; 2021 rsvp_on--; 2022 } 2023 } 2024 } 2025 2026 return; 2027} 2028 2029void 2030rsvp_input(struct mbuf *m, int iphlen) 2031{ 2032 int vifi; 2033 struct ip *ip = mtod(m, struct ip *); 2034 static struct sockaddr_in rsvp_src = { sizeof rsvp_src, AF_INET, 2035 0 , {0}, {0,0,0,0,0,0,0,0,} }; 2036 struct ifnet *ifp; 2037 2038 if (rsvpdebug) 2039 printf("rsvp_input: rsvp_on %d\n",rsvp_on); 2040 2041 /* Can still get packets with rsvp_on = 0 if there is a local member 2042 * of the group to which the RSVP packet is addressed. But in this 2043 * case we want to throw the packet away. 2044 */ 2045 if (!rsvp_on) { 2046 m_freem(m); 2047 return; 2048 } 2049 2050 if (rsvpdebug) 2051 printf("rsvp_input: check vifs\n"); 2052 2053#if DIAGNOSTIC 2054 if (!(m->m_flags & M_PKTHDR)) 2055 panic("rsvp_input no hdr"); 2056#endif 2057 2058 ifp = m->m_pkthdr.rcvif; 2059 /* Find which vif the packet arrived on. */ 2060 for (vifi = 0; vifi < numvifs; vifi++) 2061 if (viftable[vifi].v_ifp == ifp) 2062 break; 2063 2064 if (vifi == numvifs || viftable[vifi].v_rsvpd == NULL) { 2065 /* 2066 * If the old-style non-vif-associated socket is set, 2067 * then use it. Otherwise, drop packet since there 2068 * is no specific socket for this vif. 2069 */ 2070 if (ip_rsvpd != NULL) { 2071 if (rsvpdebug) 2072 printf("rsvp_input: Sending packet up old-style socket\n"); 2073 rip_input(m, iphlen); /* xxx */ 2074 } else { 2075 if (rsvpdebug && vifi == numvifs) 2076 printf("rsvp_input: Can't find vif for packet.\n"); 2077 else if (rsvpdebug && viftable[vifi].v_rsvpd == NULL) 2078 printf("rsvp_input: No socket defined for vif %d\n",vifi); 2079 m_freem(m); 2080 } 2081 return; 2082 } 2083 rsvp_src.sin_addr = ip->ip_src; 2084 2085 if (rsvpdebug && m) 2086 printf("rsvp_input: m->m_len = %d, sbspace() = %d\n", 2087 m->m_len,sbspace(&(viftable[vifi].v_rsvpd->so_rcv))); 2088 2089 if (socket_send(viftable[vifi].v_rsvpd, m, &rsvp_src) < 0) { 2090 if (rsvpdebug) 2091 printf("rsvp_input: Failed to append to socket\n"); 2092 } else { 2093 if (rsvpdebug) 2094 printf("rsvp_input: send packet up\n"); 2095 } 2096 2097} 2098 2099#if MROUTE_LKM 2100#include <sys/conf.h> 2101#include <sys/exec.h> 2102#include <sys/sysent.h> 2103#include <sys/lkm.h> 2104 2105MOD_MISC("ip_mroute_mod") 2106 2107static int 2108ip_mroute_mod_handle(struct lkm_table *lkmtp, int cmd) 2109{ 2110 int i; 2111 struct lkm_misc *args = lkmtp->private.lkm_misc; 2112 int err = 0; 2113 2114 switch(cmd) { 2115 static int (*old_ip_mrouter_cmd)(); 2116 static int (*old_ip_mrouter_done)(); 2117 static int (*old_ip_mforward)(); 2118 static int (*old_mrt_ioctl)(); 2119 static void (*old_proto4_input)(); 2120 static int (*old_legal_vif_num)(); 2121 2122 case LKM_E_LOAD: 2123 if(lkmexists(lkmtp) || ip_mrtproto) 2124 return(EEXIST); 2125 old_ip_mrouter_cmd = ip_mrouter_cmd; 2126 ip_mrouter_cmd = X_ip_mrouter_cmd; 2127 old_ip_mrouter_done = ip_mrouter_done; 2128 ip_mrouter_done = X_ip_mrouter_done; 2129 old_ip_mforward = ip_mforward; 2130 ip_mforward = X_ip_mforward; 2131 old_mrt_ioctl = mrt_ioctl; 2132 mrt_ioctl = X_mrt_ioctl; 2133 old_proto4_input = ip_protox[ENCAP_PROTO]->pr_input; 2134 ip_protox[ENCAP_PROTO]->pr_input = X_ipip_input; 2135 old_legal_vif_num = legal_vif_num; 2136 legal_vif_num = X_legal_vif_num; 2137 ip_mrtproto = IGMP_DVMRP; 2138 2139 printf("\nIP multicast routing loaded\n"); 2140 break; 2141 2142 case LKM_E_UNLOAD: 2143 if (ip_mrouter) 2144 return EINVAL; 2145 2146 ip_mrouter_cmd = old_ip_mrouter_cmd; 2147 ip_mrouter_done = old_ip_mrouter_done; 2148 ip_mforward = old_ip_mforward; 2149 mrt_ioctl = old_mrt_ioctl; 2150 ip_protox[ENCAP_PROTO]->pr_input = old_proto4_input; 2151 legal_vif_num = old_legal_vif_num; 2152 ip_mrtproto = 0; 2153 break; 2154 2155 default: 2156 err = EINVAL; 2157 break; 2158 } 2159 2160 return(err); 2161} 2162 2163int 2164ip_mroute_mod(struct lkm_table *lkmtp, int cmd, int ver) { 2165 DISPATCH(lkmtp, cmd, ver, ip_mroute_mod_handle, ip_mroute_mod_handle, 2166 nosys); 2167} 2168 2169#endif /* MROUTE_LKM */ 2170#endif /* MROUTING */ 2171