ip_mroute.c revision 41591
1163953Srrs/* 2166675Srrs * IP multicast forwarding procedures 3163953Srrs * 4163953Srrs * Written by David Waitzman, BBN Labs, August 1988. 5163953Srrs * Modified by Steve Deering, Stanford, February 1989. 6163953Srrs * Modified by Mark J. Steiglitz, Stanford, May, 1991 7163953Srrs * Modified by Van Jacobson, LBL, January 1993 8163953Srrs * Modified by Ajit Thyagarajan, PARC, August 1993 9163953Srrs * Modified by Bill Fenner, PARC, April 1995 10163953Srrs * 11163953Srrs * MROUTING Revision: 3.5 12163953Srrs * $Id: ip_mroute.c,v 1.49 1998/08/23 03:07:14 wollman Exp $ 13163953Srrs */ 14163953Srrs 15163953Srrs#include "opt_mrouting.h" 16163953Srrs 17163953Srrs#include <sys/param.h> 18163953Srrs#include <sys/systm.h> 19163953Srrs#include <sys/mbuf.h> 20163953Srrs#include <sys/socket.h> 21163953Srrs#include <sys/socketvar.h> 22163953Srrs#include <sys/protosw.h> 23163953Srrs#include <sys/time.h> 24163953Srrs#include <sys/kernel.h> 25163953Srrs#include <sys/sockio.h> 26163953Srrs#include <sys/syslog.h> 27163953Srrs#include <net/if.h> 28163953Srrs#include <net/route.h> 29163953Srrs#include <netinet/in.h> 30163953Srrs#include <netinet/in_systm.h> 31163953Srrs#include <netinet/ip.h> 32163953Srrs#include <netinet/ip_var.h> 33163953Srrs#include <netinet/in_var.h> 34163953Srrs#include <netinet/igmp.h> 35163953Srrs#include <netinet/ip_mroute.h> 36163953Srrs#include <netinet/udp.h> 37163953Srrs 38167598Srrs#ifndef NTOHL 39163953Srrs#if BYTE_ORDER != BIG_ENDIAN 40163953Srrs#define NTOHL(d) ((d) = ntohl((d))) 41163953Srrs#define NTOHS(d) ((d) = ntohs((u_short)(d))) 42163953Srrs#define HTONL(d) ((d) = htonl((d))) 43163953Srrs#define HTONS(d) ((d) = htons((u_short)(d))) 44163953Srrs#else 45163953Srrs#define NTOHL(d) 46163953Srrs#define NTOHS(d) 47163953Srrs#define HTONL(d) 48163953Srrs#define HTONS(d) 49163953Srrs#endif 50163953Srrs#endif 51163953Srrs 52163953Srrs#ifndef MROUTING 53163953Srrsextern u_long _ip_mcast_src __P((int vifi)); 54163953Srrsextern int _ip_mforward __P((struct ip *ip, struct ifnet *ifp, 55163953Srrs struct mbuf *m, struct ip_moptions *imo)); 56165220Srrsextern int _ip_mrouter_done __P((void)); 57165220Srrsextern int _ip_mrouter_get __P((struct socket *so, struct sockopt *sopt)); 58165220Srrsextern int _ip_mrouter_set __P((struct socket *so, struct sockopt *sopt)); 59165220Srrsextern int _mrt_ioctl __P((int req, caddr_t data, struct proc *p)); 60165220Srrs 61163953Srrs/* 62163953Srrs * Dummy routines and globals used when multicast routing is not compiled in. 63165220Srrs */ 64163953Srrs 65163953Srrsstruct socket *ip_mrouter = NULL; 66163953Srrsstatic u_int ip_mrtproto = 0; 67165220Srrsstatic struct mrtstat mrtstat; 68165220Srrsu_int rsvpdebug = 0; 69165220Srrs 70165220Srrsint 71165220Srrs_ip_mrouter_set(so, sopt) 72165220Srrs struct socket *so; 73163953Srrs struct sockopt *sopt; 74163953Srrs{ 75163953Srrs return(EOPNOTSUPP); 76163953Srrs} 77163953Srrs 78163953Srrsint (*ip_mrouter_set)(struct socket *, struct sockopt *) = _ip_mrouter_set; 79163953Srrs 80163953Srrs 81168299Srrsint 82163953Srrs_ip_mrouter_get(so, sopt) 83163953Srrs struct socket *so; 84163953Srrs struct sockopt *sopt; 85163953Srrs{ 86163953Srrs return(EOPNOTSUPP); 87163953Srrs} 88163953Srrs 89163953Srrsint (*ip_mrouter_get)(struct socket *, struct sockopt *) = _ip_mrouter_get; 90163953Srrs 91163953Srrsint 92163953Srrs_ip_mrouter_done() 93163953Srrs{ 94163953Srrs return(0); 95163953Srrs} 96163953Srrs 97163953Srrsint (*ip_mrouter_done)(void) = _ip_mrouter_done; 98163953Srrs 99163953Srrsint 100163953Srrs_ip_mforward(ip, ifp, m, imo) 101163953Srrs struct ip *ip; 102163953Srrs struct ifnet *ifp; 103163953Srrs struct mbuf *m; 104163953Srrs struct ip_moptions *imo; 105163953Srrs{ 106168299Srrs return(0); 107168299Srrs} 108163953Srrs 109163953Srrsint (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *, 110163953Srrs struct ip_moptions *) = _ip_mforward; 111163953Srrs 112163953Srrsint 113163953Srrs_mrt_ioctl(int req, caddr_t data, struct proc *p) 114168299Srrs{ 115168299Srrs return EOPNOTSUPP; 116163953Srrs} 117163953Srrs 118163953Srrsint (*mrt_ioctl)(int, caddr_t, struct proc *) = _mrt_ioctl; 119163953Srrs 120163953Srrsvoid 121163953Srrsrsvp_input(m, iphlen) /* XXX must fixup manually */ 122163953Srrs struct mbuf *m; 123168299Srrs int iphlen; 124168299Srrs{ 125163953Srrs /* Can still get packets with rsvp_on = 0 if there is a local member 126163953Srrs * of the group to which the RSVP packet is addressed. But in this 127163953Srrs * case we want to throw the packet away. 128163953Srrs */ 129163953Srrs if (!rsvp_on) { 130163953Srrs m_freem(m); 131163953Srrs return; 132163953Srrs } 133163953Srrs 134163953Srrs if (ip_rsvpd != NULL) { 135163953Srrs if (rsvpdebug) 136163953Srrs printf("rsvp_input: Sending packet up old-style socket\n"); 137168299Srrs rip_input(m, iphlen); 138168299Srrs return; 139163953Srrs } 140163953Srrs /* Drop the packet */ 141163953Srrs m_freem(m); 142163953Srrs} 143163953Srrs 144163953Srrsvoid ipip_input(struct mbuf *m, int iphlen) { /* XXX must fixup manually */ 145168299Srrs rip_input(m, iphlen); 146168299Srrs} 147163953Srrs 148163953Srrsint (*legal_vif_num)(int) = 0; 149163953Srrs 150163953Srrs/* 151163953Srrs * This should never be called, since IP_MULTICAST_VIF should fail, but 152163953Srrs * just in case it does get called, the code a little lower in ip_output 153163953Srrs * will assign the packet a local address. 154168299Srrs */ 155168299Srrsu_long 156163953Srrs_ip_mcast_src(int vifi) { return INADDR_ANY; } 157163953Srrsu_long (*ip_mcast_src)(int) = _ip_mcast_src; 158163953Srrs 159163953Srrsint 160163953Srrsip_rsvp_vif_init(so, sopt) 161163953Srrs struct socket *so; 162163953Srrs struct sockopt *sopt; 163163953Srrs{ 164163953Srrs return(EINVAL); 165163953Srrs} 166163953Srrs 167163953Srrsint 168163953Srrsip_rsvp_vif_done(so, sopt) 169163953Srrs struct socket *so; 170163953Srrs struct sockopt *sopt; 171163953Srrs{ 172163953Srrs return(EINVAL); 173163953Srrs} 174163953Srrs 175163953Srrsvoid 176163953Srrsip_rsvp_force_done(so) 177163953Srrs struct socket *so; 178163953Srrs{ 179163953Srrs return; 180163953Srrs} 181163953Srrs 182163953Srrs#else /* MROUTING */ 183163953Srrs 184163953Srrs#define M_HASCL(m) ((m)->m_flags & M_EXT) 185163953Srrs 186163953Srrs#define INSIZ sizeof(struct in_addr) 187163953Srrs#define same(a1, a2) \ 188163953Srrs (bcmp((caddr_t)(a1), (caddr_t)(a2), INSIZ) == 0) 189163953Srrs 190163953Srrs#define MT_MRTABLE MT_RTABLE /* since nothing else uses it */ 191163953Srrs 192163953Srrs/* 193163953Srrs * Globals. All but ip_mrouter and ip_mrtproto could be static, 194163953Srrs * except for netstat or debugging purposes. 195164181Srrs */ 196163953Srrs#ifndef MROUTE_LKM 197163953Srrsstruct socket *ip_mrouter = NULL; 198163953Srrsstatic struct mrtstat mrtstat; 199163953Srrs 200163953Srrsstatic int ip_mrtproto = IGMP_DVMRP; /* for netstat only */ 201163953Srrs#else /* MROUTE_LKM */ 202163953Srrsextern void X_ipip_input __P((struct mbuf *m, int iphlen)); 203163953Srrsextern struct mrtstat mrtstat; 204163953Srrsstatic int ip_mrtproto; 205163953Srrs#endif 206163953Srrs 207163953Srrs#define NO_RTE_FOUND 0x1 208163953Srrs#define RTE_FOUND 0x2 209163953Srrs 210163953Srrsstatic struct mbuf *mfctable[MFCTBLSIZ]; 211163953Srrsstatic u_char nexpire[MFCTBLSIZ]; 212163953Srrsstatic struct vif viftable[MAXVIFS]; 213163953Srrsstatic u_int mrtdebug = 0; /* debug level */ 214163953Srrs#define DEBUG_MFC 0x02 215163953Srrs#define DEBUG_FORWARD 0x04 216163953Srrs#define DEBUG_EXPIRE 0x08 217163953Srrs#define DEBUG_XMIT 0x10 218163953Srrsstatic u_int tbfdebug = 0; /* tbf debug level */ 219163953Srrsstatic u_int rsvpdebug = 0; /* rsvp debug level */ 220163953Srrs 221163953Srrsstatic struct callout_handle expire_upcalls_ch; 222163953Srrs 223163964Srrs#define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */ 224163979Sru#define UPCALL_EXPIRE 6 /* number of timeouts */ 225163953Srrs 226163953Srrs/* 227163953Srrs * Define the token bucket filter structures 228163953Srrs * tbftable -> each vif has one of these for storing info 229163953Srrs */ 230163953Srrs 231163953Srrsstatic struct tbf tbftable[MAXVIFS]; 232163953Srrs#define TBF_REPROCESS (hz / 100) /* 100x / second */ 233163953Srrs 234164181Srrs/* 235163953Srrs * 'Interfaces' associated with decapsulator (so we can tell 236163953Srrs * packets that went through it from ones that get reflected 237163953Srrs * by a broken gateway). These interfaces are never linked into 238163953Srrs * the system ifnet list & no routes point to them. I.e., packets 239163953Srrs * can't be sent this way. They only exist as a placeholder for 240163953Srrs * multicast source verification. 241163953Srrs */ 242163953Srrsstatic struct ifnet multicast_decap_if[MAXVIFS]; 243163953Srrs 244163953Srrs#define ENCAP_TTL 64 245163953Srrs#define ENCAP_PROTO IPPROTO_IPIP /* 4 */ 246163953Srrs 247163953Srrs/* prototype IP hdr for encapsulated packets */ 248163953Srrsstatic struct ip multicast_encap_iphdr = { 249163953Srrs#if BYTE_ORDER == LITTLE_ENDIAN 250163953Srrs sizeof(struct ip) >> 2, IPVERSION, 251164181Srrs#else 252164181Srrs IPVERSION, sizeof(struct ip) >> 2, 253164181Srrs#endif 254164181Srrs 0, /* tos */ 255164181Srrs sizeof(struct ip), /* total length */ 256164181Srrs 0, /* id */ 257164181Srrs 0, /* frag offset */ 258164181Srrs ENCAP_TTL, ENCAP_PROTO, 259164181Srrs 0, /* checksum */ 260164181Srrs}; 261164181Srrs 262164181Srrs/* 263164181Srrs * Private variables. 264163953Srrs */ 265163953Srrsstatic vifi_t numvifs = 0; 266164181Srrsstatic int have_encap_tunnel = 0; 267164181Srrs 268164181Srrs/* 269164181Srrs * one-back cache used by ipip_input to locate a tunnel's vif 270163953Srrs * given a datagram's src ip address. 271163953Srrs */ 272163953Srrsstatic u_long last_encap_src; 273163953Srrsstatic struct vif *last_encap_vif; 274163953Srrs 275163953Srrsstatic u_long X_ip_mcast_src __P((int vifi)); 276163953Srrsstatic int X_ip_mforward __P((struct ip *ip, struct ifnet *ifp, struct mbuf *m, struct ip_moptions *imo)); 277163953Srrsstatic int X_ip_mrouter_done __P((void)); 278163953Srrsstatic int X_ip_mrouter_get __P((struct socket *so, struct sockopt *m)); 279163953Srrsstatic int X_ip_mrouter_set __P((struct socket *so, struct sockopt *m)); 280163953Srrsstatic int X_legal_vif_num __P((int vif)); 281163953Srrsstatic int X_mrt_ioctl __P((int cmd, caddr_t data)); 282163953Srrs 283163953Srrsstatic int get_sg_cnt(struct sioc_sg_req *); 284163953Srrsstatic int get_vif_cnt(struct sioc_vif_req *); 285163953Srrsstatic int ip_mrouter_init(struct socket *, int); 286163953Srrsstatic int add_vif(struct vifctl *); 287163953Srrsstatic int del_vif(vifi_t); 288163953Srrsstatic int add_mfc(struct mfcctl *); 289163953Srrsstatic int del_mfc(struct mfcctl *); 290163953Srrsstatic int socket_send(struct socket *, struct mbuf *, struct sockaddr_in *); 291163953Srrsstatic int set_assert(int); 292163953Srrsstatic void expire_upcalls(void *); 293163953Srrsstatic int ip_mdq(struct mbuf *, struct ifnet *, struct mfc *, 294163953Srrs vifi_t); 295163953Srrsstatic void phyint_send(struct ip *, struct vif *, struct mbuf *); 296163953Srrsstatic void encap_send(struct ip *, struct vif *, struct mbuf *); 297163953Srrsstatic void tbf_control(struct vif *, struct mbuf *, struct ip *, u_long); 298163953Srrsstatic void tbf_queue(struct vif *, struct mbuf *); 299163953Srrsstatic void tbf_process_q(struct vif *); 300163953Srrsstatic void tbf_reprocess_q(void *); 301163953Srrsstatic int tbf_dq_sel(struct vif *, struct ip *); 302163953Srrsstatic void tbf_send_packet(struct vif *, struct mbuf *); 303163953Srrsstatic void tbf_update_tokens(struct vif *); 304163953Srrsstatic int priority(struct vif *, struct ip *); 305163953Srrsvoid multiencap_decap(struct mbuf *); 306163953Srrs 307163953Srrs/* 308163953Srrs * whether or not special PIM assert processing is enabled. 309163953Srrs */ 310163953Srrsstatic int pim_assert; 311163953Srrs/* 312163953Srrs * Rate limit for assert notification messages, in usec 313163953Srrs */ 314163953Srrs#define ASSERT_MSG_TIME 3000000 315163953Srrs 316168299Srrs/* 317163953Srrs * Hash function for a source, group entry 318163953Srrs */ 319163953Srrs#define MFCHASH(a, g) MFCHASHMOD(((a) >> 20) ^ ((a) >> 10) ^ (a) ^ \ 320163953Srrs ((g) >> 20) ^ ((g) >> 10) ^ (g)) 321163953Srrs 322163953Srrs/* 323163953Srrs * Find a route for a given origin IP address and Multicast group address 324163953Srrs * Type of service parameter to be added in the future!!! 325163953Srrs */ 326163953Srrs 327163953Srrs#define MFCFIND(o, g, rt) { \ 328163953Srrs register struct mbuf *_mb_rt = mfctable[MFCHASH(o,g)]; \ 329163953Srrs register struct mfc *_rt = NULL; \ 330163953Srrs rt = NULL; \ 331163953Srrs ++mrtstat.mrts_mfc_lookups; \ 332163953Srrs while (_mb_rt) { \ 333163953Srrs _rt = mtod(_mb_rt, struct mfc *); \ 334163953Srrs if ((_rt->mfc_origin.s_addr == o) && \ 335163953Srrs (_rt->mfc_mcastgrp.s_addr == g) && \ 336163953Srrs (_mb_rt->m_act == NULL)) { \ 337163953Srrs rt = _rt; \ 338163953Srrs break; \ 339163953Srrs } \ 340163953Srrs _mb_rt = _mb_rt->m_next; \ 341163953Srrs } \ 342163953Srrs if (rt == NULL) { \ 343163953Srrs ++mrtstat.mrts_mfc_misses; \ 344165220Srrs } \ 345168299Srrs} 346163953Srrs 347163953Srrs 348163953Srrs/* 349163953Srrs * Macros to compute elapsed time efficiently 350163953Srrs * Borrowed from Van Jacobson's scheduling code 351163953Srrs */ 352163953Srrs#define TV_DELTA(a, b, delta) { \ 353163953Srrs register int xxs; \ 354163953Srrs \ 355163953Srrs delta = (a).tv_usec - (b).tv_usec; \ 356163953Srrs if ((xxs = (a).tv_sec - (b).tv_sec)) { \ 357163953Srrs switch (xxs) { \ 358163953Srrs case 2: \ 359163953Srrs delta += 1000000; \ 360163953Srrs /* fall through */ \ 361163953Srrs case 1: \ 362163953Srrs delta += 1000000; \ 363163953Srrs break; \ 364163953Srrs default: \ 365163953Srrs delta += (1000000 * xxs); \ 366163953Srrs } \ 367163953Srrs } \ 368168299Srrs} 369163953Srrs 370163953Srrs#define TV_LT(a, b) (((a).tv_usec < (b).tv_usec && \ 371163953Srrs (a).tv_sec <= (b).tv_sec) || (a).tv_sec < (b).tv_sec) 372163953Srrs 373163953Srrs#ifdef UPCALL_TIMING 374163953Srrsu_long upcall_data[51]; 375163953Srrsstatic void collate(struct timeval *); 376163953Srrs#endif /* UPCALL_TIMING */ 377163953Srrs 378163953Srrs 379163953Srrs/* 380163953Srrs * Handle MRT setsockopt commands to modify the multicast routing tables. 381163953Srrs */ 382163953Srrsstatic int 383163953SrrsX_ip_mrouter_set(so, sopt) 384163953Srrs struct socket *so; 385163953Srrs struct sockopt *sopt; 386163953Srrs{ 387163953Srrs int error, optval; 388163953Srrs vifi_t vifi; 389165220Srrs struct vifctl vifc; 390163953Srrs struct mfcctl mfc; 391165220Srrs 392165220Srrs if (so != ip_mrouter && sopt->sopt_name != MRT_INIT) 393165220Srrs return (EPERM); 394163953Srrs 395163953Srrs error = 0; 396163953Srrs switch (sopt->sopt_name) { 397163953Srrs case MRT_INIT: 398163953Srrs error = sooptcopyin(sopt, &optval, sizeof optval, 399163953Srrs sizeof optval); 400163953Srrs if (error) 401163953Srrs break; 402163953Srrs error = ip_mrouter_init(so, optval); 403163953Srrs break; 404163953Srrs 405163953Srrs case MRT_DONE: 406163953Srrs error = ip_mrouter_done(); 407163953Srrs break; 408163953Srrs 409163953Srrs case MRT_ADD_VIF: 410163953Srrs error = sooptcopyin(sopt, &vifc, sizeof vifc, sizeof vifc); 411163953Srrs if (error) 412163953Srrs break; 413163953Srrs error = add_vif(&vifc); 414165647Srrs break; 415163953Srrs 416163953Srrs case MRT_DEL_VIF: 417163953Srrs error = sooptcopyin(sopt, &vifi, sizeof vifi, sizeof vifi); 418163953Srrs if (error) 419163953Srrs break; 420163953Srrs error = del_vif(vifi); 421163953Srrs break; 422163953Srrs 423163953Srrs case MRT_ADD_MFC: 424163953Srrs case MRT_DEL_MFC: 425163953Srrs error = sooptcopyin(sopt, &mfc, sizeof mfc, sizeof mfc); 426163953Srrs if (error) 427168299Srrs break; 428163953Srrs if (sopt->sopt_name == MRT_ADD_MFC) 429163953Srrs error = add_mfc(&mfc); 430163953Srrs else 431163953Srrs error = del_mfc(&mfc); 432163953Srrs 433163953Srrs case MRT_ASSERT: 434163953Srrs error = sooptcopyin(sopt, &optval, sizeof optval, 435163953Srrs sizeof optval); 436163953Srrs if (error) 437163953Srrs break; 438163953Srrs set_assert(optval); 439163953Srrs 440163953Srrs default: 441163953Srrs error = EOPNOTSUPP; 442163953Srrs break; 443163953Srrs } 444163953Srrs return (error); 445163953Srrs} 446163953Srrs 447163953Srrs#ifndef MROUTE_LKM 448163953Srrsint (*ip_mrouter_set)(struct socket *, struct sockopt *) = X_ip_mrouter_set; 449163953Srrs#endif 450163953Srrs 451163953Srrs/* 452163953Srrs * Handle MRT getsockopt commands 453163953Srrs */ 454163953Srrsstatic int 455163953SrrsX_ip_mrouter_get(so, sopt) 456163953Srrs struct socket *so; 457163953Srrs struct sockopt *sopt; 458163953Srrs{ 459163953Srrs int error; 460163953Srrs static int version = 0x0305; /* !!! why is this here? XXX */ 461163953Srrs 462163953Srrs switch (sopt->sopt_name) { 463163953Srrs case MRT_VERSION: 464163953Srrs error = sooptcopyout(sopt, &version, sizeof version); 465163953Srrs break; 466163953Srrs 467163953Srrs case MRT_ASSERT: 468163953Srrs error = sooptcopyout(sopt, &pim_assert, sizeof pim_assert); 469163953Srrs break; 470163953Srrs default: 471163953Srrs error = EOPNOTSUPP; 472163953Srrs break; 473163953Srrs } 474163953Srrs return (error); 475163953Srrs} 476163953Srrs 477163953Srrs#ifndef MROUTE_LKM 478163953Srrsint (*ip_mrouter_get)(struct socket *, struct sockopt *) = X_ip_mrouter_get; 479163953Srrs#endif 480163953Srrs 481163953Srrs/* 482163953Srrs * Handle ioctl commands to obtain information from the cache 483163953Srrs */ 484163953Srrsstatic int 485163953SrrsX_mrt_ioctl(cmd, data) 486167598Srrs int cmd; 487167598Srrs caddr_t data; 488167598Srrs{ 489167598Srrs int error = 0; 490167598Srrs 491167598Srrs switch (cmd) { 492167598Srrs case (SIOCGETVIFCNT): 493167598Srrs return (get_vif_cnt((struct sioc_vif_req *)data)); 494167598Srrs break; 495167598Srrs case (SIOCGETSGCNT): 496167598Srrs return (get_sg_cnt((struct sioc_sg_req *)data)); 497167598Srrs break; 498167598Srrs default: 499167598Srrs return (EINVAL); 500167598Srrs break; 501167598Srrs } 502163953Srrs return error; 503163953Srrs} 504163953Srrs 505163953Srrs#ifndef MROUTE_LKM 506163953Srrsint (*mrt_ioctl)(int, caddr_t) = X_mrt_ioctl; 507163953Srrs#endif 508163953Srrs 509163953Srrs/* 510163953Srrs * returns the packet, byte, rpf-failure count for the source group provided 511163953Srrs */ 512163953Srrsstatic int 513163953Srrsget_sg_cnt(req) 514163953Srrs register struct sioc_sg_req *req; 515163953Srrs{ 516163953Srrs register struct mfc *rt; 517163953Srrs int s; 518163953Srrs 519163953Srrs s = splnet(); 520163953Srrs MFCFIND(req->src.s_addr, req->grp.s_addr, rt); 521163953Srrs splx(s); 522163953Srrs if (rt != NULL) { 523163953Srrs req->pktcnt = rt->mfc_pkt_cnt; 524163953Srrs req->bytecnt = rt->mfc_byte_cnt; 525163953Srrs req->wrong_if = rt->mfc_wrong_if; 526163953Srrs } else 527163953Srrs req->pktcnt = req->bytecnt = req->wrong_if = 0xffffffff; 528163953Srrs 529163953Srrs return 0; 530163953Srrs} 531163953Srrs 532163953Srrs/* 533163953Srrs * returns the input and output packet and byte counts on the vif provided 534163953Srrs */ 535163953Srrsstatic int 536163953Srrsget_vif_cnt(req) 537163953Srrs register struct sioc_vif_req *req; 538163953Srrs{ 539165220Srrs register vifi_t vifi = req->vifi; 540163953Srrs 541163953Srrs if (vifi >= numvifs) return EINVAL; 542163953Srrs 543163953Srrs req->icount = viftable[vifi].v_pkt_in; 544163953Srrs req->ocount = viftable[vifi].v_pkt_out; 545163953Srrs req->ibytes = viftable[vifi].v_bytes_in; 546163953Srrs req->obytes = viftable[vifi].v_bytes_out; 547163953Srrs 548165220Srrs return 0; 549163953Srrs} 550163953Srrs 551163953Srrs/* 552163953Srrs * Enable multicast routing 553163953Srrs */ 554163953Srrsstatic int 555163953Srrsip_mrouter_init(so, version) 556163953Srrs struct socket *so; 557163953Srrs int version; 558163953Srrs{ 559163953Srrs if (mrtdebug) 560163953Srrs log(LOG_DEBUG,"ip_mrouter_init: so_type = %d, pr_protocol = %d\n", 561163953Srrs so->so_type, so->so_proto->pr_protocol); 562163953Srrs 563163953Srrs if (so->so_type != SOCK_RAW || 564163953Srrs so->so_proto->pr_protocol != IPPROTO_IGMP) return EOPNOTSUPP; 565163953Srrs 566163953Srrs if (version != 1) 567163953Srrs return ENOPROTOOPT; 568163953Srrs 569163953Srrs if (ip_mrouter != NULL) return EADDRINUSE; 570165220Srrs 571165220Srrs ip_mrouter = so; 572165220Srrs 573163953Srrs bzero((caddr_t)mfctable, sizeof(mfctable)); 574163953Srrs bzero((caddr_t)nexpire, sizeof(nexpire)); 575163953Srrs 576163953Srrs pim_assert = 0; 577163953Srrs 578163953Srrs expire_upcalls_ch = timeout(expire_upcalls, (caddr_t)NULL, EXPIRE_TIMEOUT); 579163953Srrs 580163953Srrs if (mrtdebug) 581165220Srrs log(LOG_DEBUG, "ip_mrouter_init\n"); 582163953Srrs 583163953Srrs return 0; 584163953Srrs} 585163953Srrs 586165220Srrs/* 587165220Srrs * Disable multicast routing 588165220Srrs */ 589163953Srrsstatic int 590163996SrrsX_ip_mrouter_done() 591163953Srrs{ 592163953Srrs vifi_t vifi; 593163953Srrs int i; 594163953Srrs struct ifnet *ifp; 595163953Srrs struct ifreq ifr; 596163953Srrs struct mbuf *mb_rt; 597163953Srrs struct mbuf *m; 598163953Srrs struct rtdetq *rte; 599163953Srrs int s; 600163953Srrs 601163953Srrs s = splnet(); 602163953Srrs 603163953Srrs /* 604163953Srrs * For each phyint in use, disable promiscuous reception of all IP 605163953Srrs * multicasts. 606163953Srrs */ 607163953Srrs for (vifi = 0; vifi < numvifs; vifi++) { 608163953Srrs if (viftable[vifi].v_lcl_addr.s_addr != 0 && 609163953Srrs !(viftable[vifi].v_flags & VIFF_TUNNEL)) { 610163953Srrs ((struct sockaddr_in *)&(ifr.ifr_addr))->sin_family = AF_INET; 611163953Srrs ((struct sockaddr_in *)&(ifr.ifr_addr))->sin_addr.s_addr 612165220Srrs = INADDR_ANY; 613163953Srrs ifp = viftable[vifi].v_ifp; 614163953Srrs if_allmulti(ifp, 0); 615163953Srrs } 616163953Srrs } 617163953Srrs bzero((caddr_t)tbftable, sizeof(tbftable)); 618163953Srrs bzero((caddr_t)viftable, sizeof(viftable)); 619163953Srrs numvifs = 0; 620163953Srrs pim_assert = 0; 621163953Srrs 622163953Srrs untimeout(expire_upcalls, (caddr_t)NULL, expire_upcalls_ch); 623163953Srrs 624163953Srrs /* 625163953Srrs * Free all multicast forwarding cache entries. 626163953Srrs */ 627163953Srrs for (i = 0; i < MFCTBLSIZ; i++) { 628163953Srrs mb_rt = mfctable[i]; 629163953Srrs while (mb_rt) { 630163953Srrs if (mb_rt->m_act != NULL) { 631163953Srrs while (mb_rt->m_act) { 632163953Srrs m = mb_rt->m_act; 633163953Srrs mb_rt->m_act = m->m_act; 634163953Srrs rte = mtod(m, struct rtdetq *); 635163953Srrs m_freem(rte->m); 636163953Srrs m_free(m); 637166675Srrs } 638166675Srrs } 639163953Srrs mb_rt = m_free(mb_rt); 640163953Srrs } 641163953Srrs } 642163953Srrs 643163953Srrs bzero((caddr_t)mfctable, sizeof(mfctable)); 644163953Srrs 645163953Srrs /* 646163953Srrs * Reset de-encapsulation cache 647163953Srrs */ 648163953Srrs last_encap_src = 0; 649163953Srrs last_encap_vif = NULL; 650163953Srrs have_encap_tunnel = 0; 651163953Srrs 652163953Srrs ip_mrouter = NULL; 653163953Srrs 654163953Srrs splx(s); 655163953Srrs 656163953Srrs if (mrtdebug) 657163953Srrs log(LOG_DEBUG, "ip_mrouter_done\n"); 658163953Srrs 659163953Srrs return 0; 660163953Srrs} 661163953Srrs 662163953Srrs#ifndef MROUTE_LKM 663163953Srrsint (*ip_mrouter_done)(void) = X_ip_mrouter_done; 664163953Srrs#endif 665163953Srrs 666163953Srrs/* 667163953Srrs * Set PIM assert processing global 668163953Srrs */ 669163953Srrsstatic int 670163953Srrsset_assert(i) 671165220Srrs int i; 672163953Srrs{ 673163953Srrs if ((i != 1) && (i != 0)) 674163953Srrs return EINVAL; 675163953Srrs 676165220Srrs pim_assert = i; 677165220Srrs 678165220Srrs return 0; 679163953Srrs} 680163996Srrs 681163953Srrs/* 682163953Srrs * Add a vif to the vif table 683163953Srrs */ 684163953Srrsstatic int 685163953Srrsadd_vif(vifcp) 686164205Srrs register struct vifctl *vifcp; 687163953Srrs{ 688163953Srrs register struct vif *vifp = viftable + vifcp->vifc_vifi; 689165220Srrs static struct sockaddr_in sin = {sizeof sin, AF_INET}; 690163953Srrs struct ifaddr *ifa; 691163953Srrs struct ifnet *ifp; 692163953Srrs int error, s; 693163953Srrs struct tbf *v_tbf = tbftable + vifcp->vifc_vifi; 694163953Srrs 695163953Srrs if (vifcp->vifc_vifi >= MAXVIFS) return EINVAL; 696163953Srrs if (vifp->v_lcl_addr.s_addr != 0) return EADDRINUSE; 697163953Srrs 698163953Srrs /* Find the interface with an address in AF_INET family */ 699163953Srrs sin.sin_addr = vifcp->vifc_lcl_addr; 700163953Srrs ifa = ifa_ifwithaddr((struct sockaddr *)&sin); 701163953Srrs if (ifa == 0) return EADDRNOTAVAIL; 702163953Srrs ifp = ifa->ifa_ifp; 703165220Srrs 704165220Srrs if (vifcp->vifc_flags & VIFF_TUNNEL) { 705163953Srrs if ((vifcp->vifc_flags & VIFF_SRCRT) == 0) { 706163953Srrs /* 707163953Srrs * An encapsulating tunnel is wanted. Tell ipip_input() to 708163953Srrs * start paying attention to encapsulated packets. 709163953Srrs */ 710163953Srrs if (have_encap_tunnel == 0) { 711163953Srrs have_encap_tunnel = 1; 712163953Srrs for (s = 0; s < MAXVIFS; ++s) { 713163953Srrs multicast_decap_if[s].if_name = "mdecap"; 714163953Srrs multicast_decap_if[s].if_unit = s; 715163953Srrs } 716163953Srrs } 717163953Srrs /* 718163953Srrs * Set interface to fake encapsulator interface 719163953Srrs */ 720163953Srrs ifp = &multicast_decap_if[vifcp->vifc_vifi]; 721163953Srrs /* 722163953Srrs * Prepare cached route entry 723163953Srrs */ 724163953Srrs bzero(&vifp->v_route, sizeof(vifp->v_route)); 725163953Srrs } else { 726163953Srrs log(LOG_ERR, "source routed tunnels not supported\n"); 727163953Srrs return EOPNOTSUPP; 728163953Srrs } 729163953Srrs } else { 730163953Srrs /* Make sure the interface supports multicast */ 731163953Srrs if ((ifp->if_flags & IFF_MULTICAST) == 0) 732163953Srrs return EOPNOTSUPP; 733163953Srrs 734163953Srrs /* Enable promiscuous reception of all IP multicasts from the if */ 735163953Srrs s = splnet(); 736163953Srrs error = if_allmulti(ifp, 1); 737163953Srrs splx(s); 738163953Srrs if (error) 739163953Srrs return error; 740163953Srrs } 741163953Srrs 742163953Srrs s = splnet(); 743163953Srrs /* define parameters for the tbf structure */ 744163953Srrs vifp->v_tbf = v_tbf; 745163953Srrs GET_TIME(vifp->v_tbf->tbf_last_pkt_t); 746163953Srrs vifp->v_tbf->tbf_n_tok = 0; 747163953Srrs vifp->v_tbf->tbf_q_len = 0; 748163953Srrs vifp->v_tbf->tbf_max_q_len = MAXQSIZE; 749163953Srrs vifp->v_tbf->tbf_q = vifp->v_tbf->tbf_t = NULL; 750163953Srrs 751163953Srrs vifp->v_flags = vifcp->vifc_flags; 752163953Srrs vifp->v_threshold = vifcp->vifc_threshold; 753163953Srrs vifp->v_lcl_addr = vifcp->vifc_lcl_addr; 754163953Srrs vifp->v_rmt_addr = vifcp->vifc_rmt_addr; 755163953Srrs vifp->v_ifp = ifp; 756163953Srrs /* scaling up here allows division by 1024 in critical code */ 757163953Srrs vifp->v_rate_limit= vifcp->vifc_rate_limit * 1024 / 1000; 758163953Srrs vifp->v_rsvp_on = 0; 759163953Srrs vifp->v_rsvpd = NULL; 760163953Srrs /* initialize per vif pkt counters */ 761163953Srrs vifp->v_pkt_in = 0; 762163953Srrs vifp->v_pkt_out = 0; 763163953Srrs vifp->v_bytes_in = 0; 764163953Srrs vifp->v_bytes_out = 0; 765163953Srrs splx(s); 766163953Srrs 767163953Srrs /* Adjust numvifs up if the vifi is higher than numvifs */ 768163953Srrs if (numvifs <= vifcp->vifc_vifi) numvifs = vifcp->vifc_vifi + 1; 769163953Srrs 770163953Srrs if (mrtdebug) 771163953Srrs log(LOG_DEBUG, "add_vif #%d, lcladdr %lx, %s %lx, thresh %x, rate %d\n", 772163953Srrs vifcp->vifc_vifi, 773163953Srrs (u_long)ntohl(vifcp->vifc_lcl_addr.s_addr), 774163953Srrs (vifcp->vifc_flags & VIFF_TUNNEL) ? "rmtaddr" : "mask", 775163953Srrs (u_long)ntohl(vifcp->vifc_rmt_addr.s_addr), 776163953Srrs vifcp->vifc_threshold, 777163953Srrs vifcp->vifc_rate_limit); 778163953Srrs 779163953Srrs return 0; 780163953Srrs} 781163953Srrs 782163953Srrs/* 783163953Srrs * Delete a vif from the vif table 784163953Srrs */ 785163953Srrsstatic int 786163953Srrsdel_vif(vifi) 787163953Srrs vifi_t vifi; 788163953Srrs{ 789163953Srrs register struct vif *vifp = &viftable[vifi]; 790163953Srrs register struct mbuf *m; 791163953Srrs struct ifnet *ifp; 792163953Srrs struct ifreq ifr; 793163953Srrs int s; 794163953Srrs 795163953Srrs if (vifi >= numvifs) return EINVAL; 796163953Srrs if (vifp->v_lcl_addr.s_addr == 0) return EADDRNOTAVAIL; 797163953Srrs 798163953Srrs s = splnet(); 799163953Srrs 800163953Srrs if (!(vifp->v_flags & VIFF_TUNNEL)) { 801163953Srrs ((struct sockaddr_in *)&(ifr.ifr_addr))->sin_family = AF_INET; 802163953Srrs ((struct sockaddr_in *)&(ifr.ifr_addr))->sin_addr.s_addr = INADDR_ANY; 803163953Srrs ifp = vifp->v_ifp; 804163953Srrs if_allmulti(ifp, 0); 805163953Srrs } 806163953Srrs 807163953Srrs if (vifp == last_encap_vif) { 808163953Srrs last_encap_vif = 0; 809163953Srrs last_encap_src = 0; 810163953Srrs } 811163953Srrs 812163953Srrs /* 813163953Srrs * Free packets queued at the interface 814163953Srrs */ 815163953Srrs while (vifp->v_tbf->tbf_q) { 816163953Srrs m = vifp->v_tbf->tbf_q; 817163953Srrs vifp->v_tbf->tbf_q = m->m_act; 818163953Srrs m_freem(m); 819163953Srrs } 820163953Srrs 821163953Srrs bzero((caddr_t)vifp->v_tbf, sizeof(*(vifp->v_tbf))); 822163953Srrs bzero((caddr_t)vifp, sizeof (*vifp)); 823163953Srrs 824163953Srrs if (mrtdebug) 825163953Srrs log(LOG_DEBUG, "del_vif %d, numvifs %d\n", vifi, numvifs); 826163953Srrs 827163953Srrs /* Adjust numvifs down */ 828163953Srrs for (vifi = numvifs; vifi > 0; vifi--) 829163953Srrs if (viftable[vifi-1].v_lcl_addr.s_addr != 0) break; 830163953Srrs numvifs = vifi; 831163953Srrs 832163953Srrs splx(s); 833163953Srrs 834163953Srrs return 0; 835163953Srrs} 836163953Srrs 837163953Srrs/* 838163953Srrs * Add an mfc entry 839163953Srrs */ 840163953Srrsstatic int 841163953Srrsadd_mfc(mfccp) 842163953Srrs struct mfcctl *mfccp; 843163953Srrs{ 844163953Srrs struct mfc *rt; 845163953Srrs register struct mbuf *mb_rt; 846163953Srrs u_long hash; 847165220Srrs struct mbuf *mb_ntry; 848163953Srrs struct rtdetq *rte; 849163953Srrs register u_short nstl; 850163953Srrs int s; 851163953Srrs int i; 852163953Srrs 853163953Srrs MFCFIND(mfccp->mfcc_origin.s_addr, mfccp->mfcc_mcastgrp.s_addr, rt); 854163953Srrs 855163953Srrs /* If an entry already exists, just update the fields */ 856163953Srrs if (rt) { 857163953Srrs if (mrtdebug & DEBUG_MFC) 858163953Srrs log(LOG_DEBUG,"add_mfc update o %lx g %lx p %x\n", 859163953Srrs (u_long)ntohl(mfccp->mfcc_origin.s_addr), 860163953Srrs (u_long)ntohl(mfccp->mfcc_mcastgrp.s_addr), 861163953Srrs mfccp->mfcc_parent); 862163953Srrs 863163953Srrs s = splnet(); 864163953Srrs rt->mfc_parent = mfccp->mfcc_parent; 865163953Srrs for (i = 0; i < numvifs; i++) 866163953Srrs rt->mfc_ttls[i] = mfccp->mfcc_ttls[i]; 867163953Srrs splx(s); 868163953Srrs return 0; 869163953Srrs } 870163953Srrs 871163953Srrs /* 872163953Srrs * Find the entry for which the upcall was made and update 873163953Srrs */ 874163953Srrs s = splnet(); 875163953Srrs hash = MFCHASH(mfccp->mfcc_origin.s_addr, mfccp->mfcc_mcastgrp.s_addr); 876163953Srrs for (mb_rt = mfctable[hash], nstl = 0; mb_rt; mb_rt = mb_rt->m_next) { 877163953Srrs 878163953Srrs rt = mtod(mb_rt, struct mfc *); 879163953Srrs if ((rt->mfc_origin.s_addr == mfccp->mfcc_origin.s_addr) && 880163953Srrs (rt->mfc_mcastgrp.s_addr == mfccp->mfcc_mcastgrp.s_addr) && 881163953Srrs (mb_rt->m_act != NULL)) { 882163953Srrs 883163953Srrs if (nstl++) 884163953Srrs log(LOG_ERR, "add_mfc %s o %lx g %lx p %x dbx %p\n", 885163953Srrs "multiple kernel entries", 886163953Srrs (u_long)ntohl(mfccp->mfcc_origin.s_addr), 887163953Srrs (u_long)ntohl(mfccp->mfcc_mcastgrp.s_addr), 888163953Srrs mfccp->mfcc_parent, (void *)mb_rt->m_act); 889163953Srrs 890166086Srrs if (mrtdebug & DEBUG_MFC) 891163953Srrs log(LOG_DEBUG,"add_mfc o %lx g %lx p %x dbg %p\n", 892163953Srrs (u_long)ntohl(mfccp->mfcc_origin.s_addr), 893163953Srrs (u_long)ntohl(mfccp->mfcc_mcastgrp.s_addr), 894163953Srrs mfccp->mfcc_parent, (void *)mb_rt->m_act); 895163953Srrs 896163953Srrs rt->mfc_origin = mfccp->mfcc_origin; 897163953Srrs rt->mfc_mcastgrp = mfccp->mfcc_mcastgrp; 898163953Srrs rt->mfc_parent = mfccp->mfcc_parent; 899163953Srrs for (i = 0; i < numvifs; i++) 900163953Srrs rt->mfc_ttls[i] = mfccp->mfcc_ttls[i]; 901163953Srrs /* initialize pkt counters per src-grp */ 902163953Srrs rt->mfc_pkt_cnt = 0; 903166086Srrs rt->mfc_byte_cnt = 0; 904163953Srrs rt->mfc_wrong_if = 0; 905163953Srrs rt->mfc_last_assert.tv_sec = rt->mfc_last_assert.tv_usec = 0; 906163953Srrs 907163953Srrs rt->mfc_expire = 0; /* Don't clean this guy up */ 908163953Srrs nexpire[hash]--; 909163953Srrs 910163953Srrs /* free packets Qed at the end of this entry */ 911163953Srrs while (mb_rt->m_act) { 912163953Srrs mb_ntry = mb_rt->m_act; 913163953Srrs rte = mtod(mb_ntry, struct rtdetq *); 914163953Srrs/* #ifdef RSVP_ISI */ 915163953Srrs ip_mdq(rte->m, rte->ifp, rt, -1); 916163953Srrs/* #endif */ 917163953Srrs mb_rt->m_act = mb_ntry->m_act; 918163953Srrs m_freem(rte->m); 919163953Srrs#ifdef UPCALL_TIMING 920163953Srrs collate(&(rte->t)); 921163953Srrs#endif /* UPCALL_TIMING */ 922163953Srrs m_free(mb_ntry); 923163953Srrs } 924163953Srrs } 925163953Srrs } 926163953Srrs 927163953Srrs /* 928168299Srrs * It is possible that an entry is being inserted without an upcall 929163953Srrs */ 930163953Srrs if (nstl == 0) { 931163953Srrs if (mrtdebug & DEBUG_MFC) 932163953Srrs log(LOG_DEBUG,"add_mfc no upcall h %lu o %lx g %lx p %x\n", 933163953Srrs hash, (u_long)ntohl(mfccp->mfcc_origin.s_addr), 934163953Srrs (u_long)ntohl(mfccp->mfcc_mcastgrp.s_addr), 935163953Srrs mfccp->mfcc_parent); 936163953Srrs 937163953Srrs for (mb_rt = mfctable[hash]; mb_rt; mb_rt = mb_rt->m_next) { 938163953Srrs 939163953Srrs rt = mtod(mb_rt, struct mfc *); 940163953Srrs if ((rt->mfc_origin.s_addr == mfccp->mfcc_origin.s_addr) && 941163953Srrs (rt->mfc_mcastgrp.s_addr == mfccp->mfcc_mcastgrp.s_addr)) { 942163953Srrs 943163953Srrs rt->mfc_origin = mfccp->mfcc_origin; 944163953Srrs rt->mfc_mcastgrp = mfccp->mfcc_mcastgrp; 945163953Srrs rt->mfc_parent = mfccp->mfcc_parent; 946163953Srrs for (i = 0; i < numvifs; i++) 947163953Srrs rt->mfc_ttls[i] = mfccp->mfcc_ttls[i]; 948163953Srrs /* initialize pkt counters per src-grp */ 949163953Srrs rt->mfc_pkt_cnt = 0; 950163953Srrs rt->mfc_byte_cnt = 0; 951163953Srrs rt->mfc_wrong_if = 0; 952168299Srrs rt->mfc_last_assert.tv_sec = rt->mfc_last_assert.tv_usec = 0; 953163953Srrs if (rt->mfc_expire) 954163953Srrs nexpire[hash]--; 955163953Srrs rt->mfc_expire = 0; 956163953Srrs } 957163953Srrs } 958163953Srrs if (mb_rt == NULL) { 959163953Srrs /* no upcall, so make a new entry */ 960163953Srrs MGET(mb_rt, M_DONTWAIT, MT_MRTABLE); 961163953Srrs if (mb_rt == NULL) { 962168299Srrs splx(s); 963163953Srrs return ENOBUFS; 964163953Srrs } 965163953Srrs 966163953Srrs rt = mtod(mb_rt, struct mfc *); 967163953Srrs 968163953Srrs /* insert new entry at head of hash chain */ 969163953Srrs rt->mfc_origin = mfccp->mfcc_origin; 970168299Srrs rt->mfc_mcastgrp = mfccp->mfcc_mcastgrp; 971163953Srrs rt->mfc_parent = mfccp->mfcc_parent; 972163953Srrs for (i = 0; i < numvifs; i++) 973163953Srrs rt->mfc_ttls[i] = mfccp->mfcc_ttls[i]; 974163953Srrs /* initialize pkt counters per src-grp */ 975163953Srrs rt->mfc_pkt_cnt = 0; 976163953Srrs rt->mfc_byte_cnt = 0; 977163953Srrs rt->mfc_wrong_if = 0; 978168299Srrs rt->mfc_last_assert.tv_sec = rt->mfc_last_assert.tv_usec = 0; 979163953Srrs rt->mfc_expire = 0; 980163953Srrs 981163953Srrs /* link into table */ 982163953Srrs mb_rt->m_next = mfctable[hash]; 983163953Srrs mfctable[hash] = mb_rt; 984163953Srrs mb_rt->m_act = NULL; 985163953Srrs } 986168299Srrs } 987163953Srrs splx(s); 988163953Srrs return 0; 989163953Srrs} 990163953Srrs 991163953Srrs#ifdef UPCALL_TIMING 992163953Srrs/* 993163953Srrs * collect delay statistics on the upcalls 994163953Srrs */ 995163953Srrsstatic void collate(t) 996163953Srrsregister struct timeval *t; 997163953Srrs{ 998163953Srrs register u_long d; 999163953Srrs register struct timeval tp; 1000163953Srrs register u_long delta; 1001163953Srrs 1002163953Srrs GET_TIME(tp); 1003163953Srrs 1004163953Srrs if (TV_LT(*t, tp)) 1005163953Srrs { 1006163953Srrs TV_DELTA(tp, *t, delta); 1007163953Srrs 1008168299Srrs d = delta >> 10; 1009168299Srrs if (d > 50) 1010163953Srrs d = 50; 1011163953Srrs 1012163953Srrs ++upcall_data[d]; 1013163953Srrs } 1014163953Srrs} 1015163953Srrs#endif /* UPCALL_TIMING */ 1016163953Srrs 1017163953Srrs/* 1018163953Srrs * Delete an mfc entry 1019163953Srrs */ 1020163953Srrsstatic int 1021163953Srrsdel_mfc(mfccp) 1022163953Srrs struct mfcctl *mfccp; 1023163953Srrs{ 1024163953Srrs struct in_addr origin; 1025163953Srrs struct in_addr mcastgrp; 1026163953Srrs struct mfc *rt; 1027163953Srrs struct mbuf *mb_rt; 1028163953Srrs struct mbuf **nptr; 1029163953Srrs u_long hash; 1030163953Srrs int s; 1031165220Srrs 1032163953Srrs origin = mfccp->mfcc_origin; 1033163953Srrs mcastgrp = mfccp->mfcc_mcastgrp; 1034163953Srrs hash = MFCHASH(origin.s_addr, mcastgrp.s_addr); 1035163953Srrs 1036163953Srrs if (mrtdebug & DEBUG_MFC) 1037163953Srrs log(LOG_DEBUG,"del_mfc orig %lx mcastgrp %lx\n", 1038163953Srrs (u_long)ntohl(origin.s_addr), (u_long)ntohl(mcastgrp.s_addr)); 1039163953Srrs 1040163953Srrs s = splnet(); 1041163953Srrs 1042163953Srrs nptr = &mfctable[hash]; 1043163953Srrs while ((mb_rt = *nptr) != NULL) { 1044163953Srrs rt = mtod(mb_rt, struct mfc *); 1045163953Srrs if (origin.s_addr == rt->mfc_origin.s_addr && 1046163953Srrs mcastgrp.s_addr == rt->mfc_mcastgrp.s_addr && 1047163953Srrs mb_rt->m_act == NULL) 1048163953Srrs break; 1049163953Srrs 1050163953Srrs nptr = &mb_rt->m_next; 1051163953Srrs } 1052163953Srrs if (mb_rt == NULL) { 1053163953Srrs splx(s); 1054163953Srrs return EADDRNOTAVAIL; 1055163953Srrs } 1056163953Srrs 1057163953Srrs MFREE(mb_rt, *nptr); 1058163953Srrs 1059163953Srrs splx(s); 1060163953Srrs 1061163953Srrs return 0; 1062163953Srrs} 1063163953Srrs 1064163953Srrs/* 1065163953Srrs * Send a message to mrouted on the multicast routing socket 1066163953Srrs */ 1067163953Srrsstatic int 1068163953Srrssocket_send(s, mm, src) 1069163953Srrs struct socket *s; 1070163953Srrs struct mbuf *mm; 1071163953Srrs struct sockaddr_in *src; 1072163953Srrs{ 1073163953Srrs if (s) { 1074163953Srrs if (sbappendaddr(&s->so_rcv, 1075163953Srrs (struct sockaddr *)src, 1076163953Srrs mm, (struct mbuf *)0) != 0) { 1077163953Srrs sorwakeup(s); 1078163953Srrs return 0; 1079163953Srrs } 1080163953Srrs } 1081165220Srrs m_freem(mm); 1082163953Srrs return -1; 1083164205Srrs} 1084166023Srrs 1085163953Srrs/* 1086163953Srrs * IP multicast forwarding function. This function assumes that the packet 1087163953Srrs * pointed to by "ip" has arrived on (or is about to be sent to) the interface 1088166675Srrs * pointed to by "ifp", and the packet is to be relayed to other networks 1089166023Srrs * that have members of the packet's destination IP multicast group. 1090166023Srrs * 1091166023Srrs * The packet is returned unscathed to the caller, unless it is 1092166023Srrs * erroneous, in which case a non-zero return value tells the caller to 1093166023Srrs * discard it. 1094166023Srrs */ 1095163953Srrs 1096163953Srrs#define IP_HDR_LEN 20 /* # bytes of fixed IP header (excluding options) */ 1097163953Srrs#define TUNNEL_LEN 12 /* # bytes of IP option for tunnel encapsulation */ 1098163953Srrs 1099163953Srrsstatic int 1100163953SrrsX_ip_mforward(ip, ifp, m, imo) 1101163953Srrs register struct ip *ip; 1102165647Srrs struct ifnet *ifp; 1103163953Srrs struct mbuf *m; 1104163953Srrs struct ip_moptions *imo; 1105163953Srrs{ 1106163953Srrs register struct mfc *rt; 1107163953Srrs register u_char *ipoptions; 1108165647Srrs static struct sockaddr_in k_igmpsrc = { sizeof k_igmpsrc, AF_INET }; 1109165647Srrs static int srctun = 0; 1110165647Srrs register struct mbuf *mm; 1111163953Srrs int s; 1112165647Srrs vifi_t vifi; 1113163953Srrs struct vif *vifp; 1114163953Srrs 1115163953Srrs if (mrtdebug & DEBUG_FORWARD) 1116163953Srrs log(LOG_DEBUG, "ip_mforward: src %lx, dst %lx, ifp %p\n", 1117166023Srrs (u_long)ntohl(ip->ip_src.s_addr), (u_long)ntohl(ip->ip_dst.s_addr), 1118166023Srrs (void *)ifp); 1119163953Srrs 1120163953Srrs if (ip->ip_hl < (IP_HDR_LEN + TUNNEL_LEN) >> 2 || 1121163953Srrs (ipoptions = (u_char *)(ip + 1))[1] != IPOPT_LSRR ) { 1122163953Srrs /* 1123163953Srrs * Packet arrived via a physical interface or 1124163953Srrs * an encapsulated tunnel. 1125163953Srrs */ 1126163953Srrs } else { 1127163953Srrs /* 1128163953Srrs * Packet arrived through a source-route tunnel. 1129163953Srrs * Source-route tunnels are no longer supported. 1130163953Srrs */ 1131163953Srrs if ((srctun++ % 1000) == 0) 1132163953Srrs log(LOG_ERR, 1133163953Srrs "ip_mforward: received source-routed packet from %lx\n", 1134163953Srrs (u_long)ntohl(ip->ip_src.s_addr)); 1135163953Srrs 1136163953Srrs return 1; 1137163953Srrs } 1138163953Srrs 1139163953Srrs if ((imo) && ((vifi = imo->imo_multicast_vif) < numvifs)) { 1140163953Srrs if (ip->ip_ttl < 255) 1141163953Srrs ip->ip_ttl++; /* compensate for -1 in *_send routines */ 1142163953Srrs if (rsvpdebug && ip->ip_p == IPPROTO_RSVP) { 1143163953Srrs vifp = viftable + vifi; 1144163953Srrs printf("Sending IPPROTO_RSVP from %lx to %lx on vif %d (%s%s%d)\n", 1145163953Srrs ntohl(ip->ip_src.s_addr), ntohl(ip->ip_dst.s_addr), vifi, 1146163953Srrs (vifp->v_flags & VIFF_TUNNEL) ? "tunnel on " : "", 1147163953Srrs vifp->v_ifp->if_name, vifp->v_ifp->if_unit); 1148163953Srrs } 1149163953Srrs return (ip_mdq(m, ifp, NULL, vifi)); 1150163953Srrs } 1151163953Srrs if (rsvpdebug && ip->ip_p == IPPROTO_RSVP) { 1152163953Srrs printf("Warning: IPPROTO_RSVP from %lx to %lx without vif option\n", 1153163953Srrs ntohl(ip->ip_src.s_addr), ntohl(ip->ip_dst.s_addr)); 1154163953Srrs if(!imo) 1155163953Srrs printf("In fact, no options were specified at all\n"); 1156163953Srrs } 1157163953Srrs 1158163953Srrs /* 1159163953Srrs * Don't forward a packet with time-to-live of zero or one, 1160163953Srrs * or a packet destined to a local-only group. 1161166023Srrs */ 1162166086Srrs if (ip->ip_ttl <= 1 || 1163166023Srrs ntohl(ip->ip_dst.s_addr) <= INADDR_MAX_LOCAL_GROUP) 1164166086Srrs return 0; 1165166086Srrs 1166166086Srrs /* 1167166086Srrs * Determine forwarding vifs from the forwarding cache table 1168166023Srrs */ 1169163953Srrs s = splnet(); 1170163953Srrs MFCFIND(ip->ip_src.s_addr, ip->ip_dst.s_addr, rt); 1171163953Srrs 1172166023Srrs /* Entry exists, so forward if necessary */ 1173163953Srrs if (rt != NULL) { 1174163953Srrs splx(s); 1175166023Srrs return (ip_mdq(m, ifp, rt, -1)); 1176166023Srrs } else { 1177166023Srrs /* 1178163953Srrs * If we don't have a route for packet's origin, 1179163953Srrs * Make a copy of the packet & 1180163953Srrs * send message to routing daemon 1181163953Srrs */ 1182166023Srrs 1183166023Srrs register struct mbuf *mb_rt; 1184163953Srrs register struct mbuf *mb_ntry; 1185163953Srrs register struct mbuf *mb0; 1186163953Srrs register struct rtdetq *rte; 1187163953Srrs register struct mbuf *rte_m; 1188165220Srrs register u_long hash; 1189165220Srrs register int npkts; 1190163953Srrs int hlen = ip->ip_hl << 2; 1191166675Srrs#ifdef UPCALL_TIMING 1192166675Srrs struct timeval tp; 1193166675Srrs 1194166675Srrs GET_TIME(tp); 1195163953Srrs#endif 1196166675Srrs 1197163953Srrs mrtstat.mrts_no_route++; 1198163953Srrs if (mrtdebug & (DEBUG_FORWARD | DEBUG_MFC)) 1199163953Srrs log(LOG_DEBUG, "ip_mforward: no rte s %lx g %lx\n", 1200166675Srrs (u_long)ntohl(ip->ip_src.s_addr), 1201163953Srrs (u_long)ntohl(ip->ip_dst.s_addr)); 1202163953Srrs 1203163953Srrs /* 1204166675Srrs * Allocate mbufs early so that we don't do extra work if we are 1205165220Srrs * just going to fail anyway. Make sure to pullup the header so 1206163953Srrs * that other people can't step on it. 1207163953Srrs */ 1208163953Srrs MGET(mb_ntry, M_DONTWAIT, MT_DATA); 1209163953Srrs if (mb_ntry == NULL) { 1210163953Srrs splx(s); 1211163953Srrs return ENOBUFS; 1212163953Srrs } 1213163953Srrs mb0 = m_copy(m, 0, M_COPYALL); 1214163953Srrs if (mb0 && (M_HASCL(mb0) || mb0->m_len < hlen)) 1215163953Srrs mb0 = m_pullup(mb0, hlen); 1216163953Srrs if (mb0 == NULL) { 1217163953Srrs m_free(mb_ntry); 1218163953Srrs splx(s); 1219163953Srrs return ENOBUFS; 1220163953Srrs } 1221163953Srrs 1222163953Srrs /* is there an upcall waiting for this packet? */ 1223163953Srrs hash = MFCHASH(ip->ip_src.s_addr, ip->ip_dst.s_addr); 1224163953Srrs for (mb_rt = mfctable[hash]; mb_rt; mb_rt = mb_rt->m_next) { 1225163953Srrs rt = mtod(mb_rt, struct mfc *); 1226163953Srrs if ((ip->ip_src.s_addr == rt->mfc_origin.s_addr) && 1227163953Srrs (ip->ip_dst.s_addr == rt->mfc_mcastgrp.s_addr) && 1228163953Srrs (mb_rt->m_act != NULL)) 1229163953Srrs break; 1230163953Srrs } 1231163953Srrs 1232163953Srrs if (mb_rt == NULL) { 1233163953Srrs int i; 1234163953Srrs struct igmpmsg *im; 1235163953Srrs 1236163953Srrs /* no upcall, so make a new entry */ 1237163953Srrs MGET(mb_rt, M_DONTWAIT, MT_MRTABLE); 1238163953Srrs if (mb_rt == NULL) { 1239166675Srrs m_free(mb_ntry); 1240163953Srrs m_freem(mb0); 1241163953Srrs splx(s); 1242165220Srrs return ENOBUFS; 1243163953Srrs } 1244163953Srrs /* Make a copy of the header to send to the user level process */ 1245163953Srrs mm = m_copy(mb0, 0, hlen); 1246163953Srrs if (mm == NULL) { 1247163953Srrs m_free(mb_ntry); 1248163953Srrs m_freem(mb0); 1249163953Srrs m_free(mb_rt); 1250163953Srrs splx(s); 1251166023Srrs return ENOBUFS; 1252166023Srrs } 1253163953Srrs 1254163953Srrs /* 1255163953Srrs * Send message to routing daemon to install 1256165220Srrs * a route into the kernel table 1257163953Srrs */ 1258166023Srrs k_igmpsrc.sin_addr = ip->ip_src; 1259166023Srrs 1260163953Srrs im = mtod(mm, struct igmpmsg *); 1261163953Srrs im->im_msgtype = IGMPMSG_NOCACHE; 1262163953Srrs im->im_mbz = 0; 1263163953Srrs 1264163953Srrs mrtstat.mrts_upcalls++; 1265163953Srrs 1266163953Srrs if (socket_send(ip_mrouter, mm, &k_igmpsrc) < 0) { 1267163953Srrs log(LOG_WARNING, "ip_mforward: ip_mrouter socket queue full\n"); 1268163953Srrs ++mrtstat.mrts_upq_sockfull; 1269166023Srrs m_free(mb_ntry); 1270166023Srrs m_freem(mb0); 1271163953Srrs m_free(mb_rt); 1272163953Srrs splx(s); 1273163953Srrs return ENOBUFS; 1274163953Srrs } 1275163953Srrs 1276163953Srrs rt = mtod(mb_rt, struct mfc *); 1277163953Srrs 1278163953Srrs /* insert new entry at head of hash chain */ 1279163953Srrs rt->mfc_origin.s_addr = ip->ip_src.s_addr; 1280166023Srrs rt->mfc_mcastgrp.s_addr = ip->ip_dst.s_addr; 1281166023Srrs rt->mfc_expire = UPCALL_EXPIRE; 1282166023Srrs nexpire[hash]++; 1283166023Srrs for (i = 0; i < numvifs; i++) 1284166023Srrs rt->mfc_ttls[i] = 0; 1285166023Srrs rt->mfc_parent = -1; 1286166023Srrs 1287166023Srrs /* link into table */ 1288166023Srrs mb_rt->m_next = mfctable[hash]; 1289166023Srrs mfctable[hash] = mb_rt; 1290166023Srrs mb_rt->m_act = NULL; 1291166023Srrs 1292166023Srrs rte_m = mb_rt; 1293166023Srrs } else { 1294166023Srrs /* determine if q has overflowed */ 1295166023Srrs for (rte_m = mb_rt, npkts = 0; rte_m->m_act; rte_m = rte_m->m_act) 1296166023Srrs npkts++; 1297166023Srrs 1298166023Srrs if (npkts > MAX_UPQ) { 1299166023Srrs mrtstat.mrts_upq_ovflw++; 1300166023Srrs m_free(mb_ntry); 1301166023Srrs m_freem(mb0); 1302166023Srrs splx(s); 1303166023Srrs return 0; 1304166023Srrs } 1305165220Srrs } 1306163953Srrs 1307163953Srrs mb_ntry->m_act = NULL; 1308163953Srrs rte = mtod(mb_ntry, struct rtdetq *); 1309163953Srrs 1310163953Srrs rte->m = mb0; 1311163953Srrs rte->ifp = ifp; 1312163953Srrs#ifdef UPCALL_TIMING 1313163953Srrs rte->t = tp; 1314163953Srrs#endif 1315163953Srrs 1316163953Srrs /* Add this entry to the end of the queue */ 1317163953Srrs rte_m->m_act = mb_ntry; 1318164205Srrs 1319164205Srrs splx(s); 1320164205Srrs 1321163953Srrs return 0; 1322164205Srrs } 1323164205Srrs} 1324164205Srrs 1325164205Srrs#ifndef MROUTE_LKM 1326164205Srrsint (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *, 1327164205Srrs struct ip_moptions *) = X_ip_mforward; 1328164205Srrs#endif 1329164205Srrs 1330164205Srrs/* 1331164205Srrs * Clean up the cache entry if upcall is not serviced 1332163953Srrs */ 1333164205Srrsstatic void 1334164205Srrsexpire_upcalls(void *unused) 1335164205Srrs{ 1336168124Srrs struct mbuf *mb_rt, *m, **nptr; 1337164205Srrs struct rtdetq *rte; 1338164205Srrs struct mfc *mfc; 1339164205Srrs int i; 1340164205Srrs int s; 1341164205Srrs 1342163953Srrs s = splnet(); 1343163953Srrs for (i = 0; i < MFCTBLSIZ; i++) { 1344163953Srrs if (nexpire[i] == 0) 1345166023Srrs continue; 1346166023Srrs nptr = &mfctable[i]; 1347163953Srrs for (mb_rt = *nptr; mb_rt != NULL; mb_rt = *nptr) { 1348163953Srrs mfc = mtod(mb_rt, struct mfc *); 1349163953Srrs 1350163953Srrs /* 1351163953Srrs * Skip real cache entries 1352166023Srrs * Make sure it wasn't marked to not expire (shouldn't happen) 1353166023Srrs * If it expires now 1354163953Srrs */ 1355163953Srrs if (mb_rt->m_act != NULL && 1356163953Srrs mfc->mfc_expire != 0 && 1357163953Srrs --mfc->mfc_expire == 0) { 1358163953Srrs if (mrtdebug & DEBUG_EXPIRE) 1359163953Srrs log(LOG_DEBUG, "expire_upcalls: expiring (%lx %lx)\n", 1360163953Srrs (u_long)ntohl(mfc->mfc_origin.s_addr), 1361163953Srrs (u_long)ntohl(mfc->mfc_mcastgrp.s_addr)); 1362163953Srrs /* 1363163953Srrs * drop all the packets 1364163953Srrs * free the mbuf with the pkt, if, timing info 1365163953Srrs */ 1366163953Srrs while (mb_rt->m_act) { 1367166675Srrs m = mb_rt->m_act; 1368166675Srrs mb_rt->m_act = m->m_act; 1369166675Srrs 1370166675Srrs rte = mtod(m, struct rtdetq *); 1371166675Srrs m_freem(rte->m); 1372166675Srrs m_free(m); 1373166675Srrs } 1374166675Srrs ++mrtstat.mrts_cache_cleanups; 1375166675Srrs nexpire[i]--; 1376166675Srrs 1377163953Srrs MFREE(mb_rt, *nptr); 1378163953Srrs } else { 1379166675Srrs nptr = &mb_rt->m_next; 1380163953Srrs } 1381163953Srrs } 1382163953Srrs } 1383163953Srrs splx(s); 1384163953Srrs expire_upcalls_ch = timeout(expire_upcalls, (caddr_t)NULL, EXPIRE_TIMEOUT); 1385163953Srrs} 1386163953Srrs 1387165220Srrs/* 1388163953Srrs * Packet forwarding routine once entry in the cache is made 1389164205Srrs */ 1390164205Srrsstatic int 1391164205Srrsip_mdq(m, ifp, rt, xmt_vif) 1392164205Srrs register struct mbuf *m; 1393164205Srrs register struct ifnet *ifp; 1394164205Srrs register struct mfc *rt; 1395164205Srrs register vifi_t xmt_vif; 1396164205Srrs{ 1397164205Srrs register struct ip *ip = mtod(m, struct ip *); 1398164205Srrs register vifi_t vifi; 1399166023Srrs register struct vif *vifp; 1400166023Srrs register int plen = ip->ip_len; 1401166023Srrs 1402163953Srrs/* 1403163953Srrs * Macro to send packet on vif. Since RSVP packets don't get counted on 1404163953Srrs * input, they shouldn't get counted on output, so statistics keeping is 1405163953Srrs * seperate. 1406163953Srrs */ 1407163953Srrs#define MC_SEND(ip,vifp,m) { \ 1408163953Srrs if ((vifp)->v_flags & VIFF_TUNNEL) \ 1409163953Srrs encap_send((ip), (vifp), (m)); \ 1410163953Srrs else \ 1411163953Srrs phyint_send((ip), (vifp), (m)); \ 1412163953Srrs} 1413163953Srrs 1414165220Srrs /* 1415166023Srrs * If xmt_vif is not -1, send on only the requested vif. 1416166023Srrs * 1417165220Srrs * (since vifi_t is u_short, -1 becomes MAXUSHORT, which > numvifs.) 1418165220Srrs */ 1419165647Srrs if (xmt_vif < numvifs) { 1420163953Srrs MC_SEND(ip, viftable + xmt_vif, m); 1421163953Srrs return 1; 1422163953Srrs } 1423165220Srrs 1424166675Srrs /* 1425166675Srrs * Don't forward if it didn't arrive from the parent vif for its origin. 1426166675Srrs */ 1427166675Srrs vifi = rt->mfc_parent; 1428166675Srrs if ((vifi >= numvifs) || (viftable[vifi].v_ifp != ifp)) { 1429166675Srrs /* came in the wrong interface */ 1430166675Srrs if (mrtdebug & DEBUG_FORWARD) 1431166675Srrs log(LOG_DEBUG, "wrong if: ifp %p vifi %d vififp %p\n", 1432166675Srrs (void *)ifp, vifi, (void *)viftable[vifi].v_ifp); 1433166675Srrs ++mrtstat.mrts_wrong_if; 1434165647Srrs ++rt->mfc_wrong_if; 1435165647Srrs /* 1436165647Srrs * If we are doing PIM assert processing, and we are forwarding 1437165647Srrs * packets on this interface, and it is a broadcast medium 1438165647Srrs * interface (and not a tunnel), send a message to the routing daemon. 1439165647Srrs */ 1440165647Srrs if (pim_assert && rt->mfc_ttls[vifi] && 1441165647Srrs (ifp->if_flags & IFF_BROADCAST) && 1442165647Srrs !(viftable[vifi].v_flags & VIFF_TUNNEL)) { 1443165647Srrs struct sockaddr_in k_igmpsrc; 1444165647Srrs struct mbuf *mm; 1445165647Srrs struct igmpmsg *im; 1446165647Srrs int hlen = ip->ip_hl << 2; 1447165647Srrs struct timeval now; 1448165647Srrs register u_long delta; 1449165647Srrs 1450165647Srrs GET_TIME(now); 1451165647Srrs 1452165647Srrs TV_DELTA(rt->mfc_last_assert, now, delta); 1453165647Srrs 1454165647Srrs if (delta > ASSERT_MSG_TIME) { 1455165647Srrs mm = m_copy(m, 0, hlen); 1456165647Srrs if (mm && (M_HASCL(mm) || mm->m_len < hlen)) 1457165647Srrs mm = m_pullup(mm, hlen); 1458165220Srrs if (mm == NULL) { 1459165220Srrs return ENOBUFS; 1460165220Srrs } 1461165220Srrs 1462165220Srrs rt->mfc_last_assert = now; 1463163953Srrs 1464164205Srrs im = mtod(mm, struct igmpmsg *); 1465165220Srrs im->im_msgtype = IGMPMSG_WRONGVIF; 1466164205Srrs im->im_mbz = 0; 1467165220Srrs im->im_vif = vifi; 1468165220Srrs 1469165220Srrs k_igmpsrc.sin_addr = im->im_src; 1470165220Srrs 1471165220Srrs socket_send(ip_mrouter, mm, &k_igmpsrc); 1472163953Srrs } 1473163953Srrs } 1474163953Srrs return 0; 1475163953Srrs } 1476163953Srrs 1477163953Srrs /* If I sourced this packet, it counts as output, else it was input. */ 1478163953Srrs if (ip->ip_src.s_addr == viftable[vifi].v_lcl_addr.s_addr) { 1479163953Srrs viftable[vifi].v_pkt_out++; 1480163953Srrs viftable[vifi].v_bytes_out += plen; 1481163953Srrs } else { 1482163953Srrs viftable[vifi].v_pkt_in++; 1483163953Srrs viftable[vifi].v_bytes_in += plen; 1484163953Srrs } 1485163953Srrs rt->mfc_pkt_cnt++; 1486163953Srrs rt->mfc_byte_cnt += plen; 1487163953Srrs 1488163953Srrs /* 1489163953Srrs * For each vif, decide if a copy of the packet should be forwarded. 1490163953Srrs * Forward if: 1491163953Srrs * - the ttl exceeds the vif's threshold 1492163953Srrs * - there are group members downstream on interface 1493163953Srrs */ 1494163953Srrs for (vifp = viftable, vifi = 0; vifi < numvifs; vifp++, vifi++) 1495163953Srrs if ((rt->mfc_ttls[vifi] > 0) && 1496164205Srrs (ip->ip_ttl > rt->mfc_ttls[vifi])) { 1497165220Srrs vifp->v_pkt_out++; 1498165220Srrs vifp->v_bytes_out += plen; 1499165220Srrs MC_SEND(ip, vifp, m); 1500163953Srrs } 1501163953Srrs 1502166023Srrs return 0; 1503166023Srrs} 1504166023Srrs 1505163953Srrs/* 1506163953Srrs * check if a vif number is legal/ok. This is used by ip_output, to export 1507163953Srrs * numvifs there, 1508163953Srrs */ 1509163953Srrsstatic int 1510163953SrrsX_legal_vif_num(vif) 1511163953Srrs int vif; 1512163953Srrs{ 1513163953Srrs if (vif >= 0 && vif < numvifs) 1514163953Srrs return(1); 1515163953Srrs else 1516166023Srrs return(0); 1517166023Srrs} 1518166023Srrs 1519163953Srrs#ifndef MROUTE_LKM 1520163953Srrsint (*legal_vif_num)(int) = X_legal_vif_num; 1521163953Srrs#endif 1522163953Srrs 1523165220Srrs/* 1524163953Srrs * Return the local address used by this vif 1525166023Srrs */ 1526166023Srrsstatic u_long 1527163953SrrsX_ip_mcast_src(vifi) 1528163953Srrs int vifi; 1529163953Srrs{ 1530166023Srrs if (vifi >= 0 && vifi < numvifs) 1531166023Srrs return viftable[vifi].v_lcl_addr.s_addr; 1532163953Srrs else 1533163953Srrs return INADDR_ANY; 1534163953Srrs} 1535163953Srrs 1536166086Srrs#ifndef MROUTE_LKM 1537163953Srrsu_long (*ip_mcast_src)(int) = X_ip_mcast_src; 1538163953Srrs#endif 1539163953Srrs 1540163953Srrsstatic void 1541163953Srrsphyint_send(ip, vifp, m) 1542163953Srrs struct ip *ip; 1543163953Srrs struct vif *vifp; 1544163953Srrs struct mbuf *m; 1545163953Srrs{ 1546163953Srrs register struct mbuf *mb_copy; 1547163953Srrs register int hlen = ip->ip_hl << 2; 1548163953Srrs 1549163953Srrs /* 1550163953Srrs * Make a new reference to the packet; make sure that 1551163953Srrs * the IP header is actually copied, not just referenced, 1552163953Srrs * so that ip_output() only scribbles on the copy. 1553163953Srrs */ 1554163953Srrs mb_copy = m_copy(m, 0, M_COPYALL); 1555163953Srrs if (mb_copy && (M_HASCL(mb_copy) || mb_copy->m_len < hlen)) 1556163953Srrs mb_copy = m_pullup(mb_copy, hlen); 1557163953Srrs if (mb_copy == NULL) 1558163953Srrs return; 1559168299Srrs 1560163953Srrs if (vifp->v_rate_limit <= 0) 1561163953Srrs tbf_send_packet(vifp, mb_copy); 1562163953Srrs else 1563163953Srrs tbf_control(vifp, mb_copy, mtod(mb_copy, struct ip *), ip->ip_len); 1564163953Srrs} 1565166675Srrs 1566163953Srrsstatic void 1567168299Srrsencap_send(ip, vifp, m) 1568167598Srrs register struct ip *ip; 1569163953Srrs register struct vif *vifp; 1570163953Srrs register struct mbuf *m; 1571163953Srrs{ 1572163953Srrs register struct mbuf *mb_copy; 1573163953Srrs register struct ip *ip_copy; 1574163953Srrs register int i, len = ip->ip_len; 1575163953Srrs 1576163953Srrs /* 1577163953Srrs * copy the old packet & pullup its IP header into the 1578163953Srrs * new mbuf so we can modify it. Try to fill the new 1579163953Srrs * mbuf since if we don't the ethernet driver will. 1580163953Srrs */ 1581163953Srrs MGETHDR(mb_copy, M_DONTWAIT, MT_HEADER); 1582163953Srrs if (mb_copy == NULL) 1583163953Srrs return; 1584163953Srrs mb_copy->m_data += max_linkhdr; 1585163953Srrs mb_copy->m_len = sizeof(multicast_encap_iphdr); 1586163953Srrs 1587163953Srrs if ((mb_copy->m_next = m_copy(m, 0, M_COPYALL)) == NULL) { 1588163953Srrs m_freem(mb_copy); 1589163953Srrs return; 1590163953Srrs } 1591163953Srrs i = MHLEN - M_LEADINGSPACE(mb_copy); 1592163953Srrs if (i > len) 1593163953Srrs i = len; 1594163953Srrs mb_copy = m_pullup(mb_copy, i); 1595163953Srrs if (mb_copy == NULL) 1596163953Srrs return; 1597163953Srrs mb_copy->m_pkthdr.len = len + sizeof(multicast_encap_iphdr); 1598163953Srrs 1599163953Srrs /* 1600163953Srrs * fill in the encapsulating IP header. 1601163953Srrs */ 1602163953Srrs ip_copy = mtod(mb_copy, struct ip *); 1603163953Srrs *ip_copy = multicast_encap_iphdr; 1604163953Srrs ip_copy->ip_id = htons(ip_id++); 1605163953Srrs ip_copy->ip_len += len; 1606163953Srrs ip_copy->ip_src = vifp->v_lcl_addr; 1607163953Srrs ip_copy->ip_dst = vifp->v_rmt_addr; 1608163953Srrs 1609163953Srrs /* 1610163953Srrs * turn the encapsulated IP header back into a valid one. 1611163953Srrs */ 1612163953Srrs ip = (struct ip *)((caddr_t)ip_copy + sizeof(multicast_encap_iphdr)); 1613163953Srrs --ip->ip_ttl; 1614163953Srrs HTONS(ip->ip_len); 1615163953Srrs HTONS(ip->ip_off); 1616163953Srrs ip->ip_sum = 0; 1617163953Srrs mb_copy->m_data += sizeof(multicast_encap_iphdr); 1618163953Srrs ip->ip_sum = in_cksum(mb_copy, ip->ip_hl << 2); 1619163953Srrs mb_copy->m_data -= sizeof(multicast_encap_iphdr); 1620163953Srrs 1621163953Srrs if (vifp->v_rate_limit <= 0) 1622163953Srrs tbf_send_packet(vifp, mb_copy); 1623163953Srrs else 1624163953Srrs tbf_control(vifp, mb_copy, ip, ip_copy->ip_len); 1625163953Srrs} 1626163953Srrs 1627163953Srrs/* 1628163953Srrs * De-encapsulate a packet and feed it back through ip input (this 1629163953Srrs * routine is called whenever IP gets a packet with proto type 1630168299Srrs * ENCAP_PROTO and a local destination address). 1631163953Srrs */ 1632163953Srrsvoid 1633163953Srrs#ifdef MROUTE_LKM 1634163953SrrsX_ipip_input(m, iphlen) 1635163953Srrs#else 1636163953Srrsipip_input(m, iphlen) 1637163953Srrs#endif 1638163953Srrs register struct mbuf *m; 1639163953Srrs int iphlen; 1640163953Srrs{ 1641163953Srrs struct ifnet *ifp = m->m_pkthdr.rcvif; 1642163953Srrs register struct ip *ip = mtod(m, struct ip *); 1643163953Srrs register int hlen = ip->ip_hl << 2; 1644163953Srrs register int s; 1645163953Srrs register struct ifqueue *ifq; 1646163953Srrs register struct vif *vifp; 1647163953Srrs 1648163953Srrs if (!have_encap_tunnel) { 1649163953Srrs rip_input(m, iphlen); 1650163953Srrs return; 1651163953Srrs } 1652163953Srrs /* 1653163953Srrs * dump the packet if it's not to a multicast destination or if 1654163953Srrs * we don't have an encapsulating tunnel with the source. 1655163953Srrs * Note: This code assumes that the remote site IP address 1656163953Srrs * uniquely identifies the tunnel (i.e., that this site has 1657163953Srrs * at most one tunnel with the remote site). 1658163953Srrs */ 1659163953Srrs if (! IN_MULTICAST(ntohl(((struct ip *)((char *)ip + hlen))->ip_dst.s_addr))) { 1660163953Srrs ++mrtstat.mrts_bad_tunnel; 1661163953Srrs m_freem(m); 1662163953Srrs return; 1663163953Srrs } 1664163953Srrs if (ip->ip_src.s_addr != last_encap_src) { 1665163953Srrs register struct vif *vife; 1666163953Srrs 1667163953Srrs vifp = viftable; 1668163953Srrs vife = vifp + numvifs; 1669163953Srrs last_encap_src = ip->ip_src.s_addr; 1670163953Srrs last_encap_vif = 0; 1671163953Srrs for ( ; vifp < vife; ++vifp) 1672163953Srrs if (vifp->v_rmt_addr.s_addr == ip->ip_src.s_addr) { 1673163953Srrs if ((vifp->v_flags & (VIFF_TUNNEL|VIFF_SRCRT)) 1674163953Srrs == VIFF_TUNNEL) 1675163953Srrs last_encap_vif = vifp; 1676163953Srrs break; 1677163953Srrs } 1678163953Srrs } 1679163953Srrs if ((vifp = last_encap_vif) == 0) { 1680163953Srrs last_encap_src = 0; 1681163953Srrs mrtstat.mrts_cant_tunnel++; /*XXX*/ 1682163953Srrs m_freem(m); 1683163953Srrs if (mrtdebug) 1684165220Srrs log(LOG_DEBUG, "ip_mforward: no tunnel with %lx\n", 1685163953Srrs (u_long)ntohl(ip->ip_src.s_addr)); 1686163953Srrs return; 1687163953Srrs } 1688163953Srrs ifp = vifp->v_ifp; 1689163953Srrs 1690163953Srrs if (hlen > IP_HDR_LEN) 1691165220Srrs ip_stripoptions(m, (struct mbuf *) 0); 1692163953Srrs m->m_data += IP_HDR_LEN; 1693163953Srrs m->m_len -= IP_HDR_LEN; 1694163953Srrs m->m_pkthdr.len -= IP_HDR_LEN; 1695163953Srrs m->m_pkthdr.rcvif = ifp; 1696163953Srrs 1697163953Srrs ifq = &ipintrq; 1698163953Srrs s = splimp(); 1699163953Srrs if (IF_QFULL(ifq)) { 1700163953Srrs IF_DROP(ifq); 1701163953Srrs m_freem(m); 1702163953Srrs } else { 1703163953Srrs IF_ENQUEUE(ifq, m); 1704163953Srrs /* 1705166675Srrs * normally we would need a "schednetisr(NETISR_IP)" 1706163953Srrs * here but we were called by ip_input and it is going 1707163953Srrs * to loop back & try to dequeue the packet we just 1708163953Srrs * queued as soon as we return so we avoid the 1709163953Srrs * unnecessary software interrrupt. 1710163953Srrs */ 1711163953Srrs } 1712165220Srrs splx(s); 1713163953Srrs} 1714163953Srrs 1715163953Srrs/* 1716163953Srrs * Token bucket filter module 1717163953Srrs */ 1718163953Srrs 1719163953Srrsstatic void 1720163953Srrstbf_control(vifp, m, ip, p_len) 1721163953Srrs register struct vif *vifp; 1722163953Srrs register struct mbuf *m; 1723163953Srrs register struct ip *ip; 1724163953Srrs register u_long p_len; 1725163953Srrs{ 1726163953Srrs register struct tbf *t = vifp->v_tbf; 1727163953Srrs 1728163953Srrs if (p_len > MAX_BKT_SIZE) { 1729163953Srrs /* drop if packet is too large */ 1730163953Srrs mrtstat.mrts_pkt2large++; 1731163953Srrs m_freem(m); 1732165220Srrs return; 1733163953Srrs } 1734163953Srrs 1735163953Srrs tbf_update_tokens(vifp); 1736163953Srrs 1737163953Srrs /* if there are enough tokens, 1738163953Srrs * and the queue is empty, 1739163953Srrs * send this packet out 1740163953Srrs */ 1741163953Srrs 1742163953Srrs if (t->tbf_q_len == 0) { 1743163953Srrs /* queue empty, send packet if enough tokens */ 1744163953Srrs if (p_len <= t->tbf_n_tok) { 1745163953Srrs t->tbf_n_tok -= p_len; 1746163953Srrs tbf_send_packet(vifp, m); 1747163953Srrs } else { 1748163953Srrs /* queue packet and timeout till later */ 1749163953Srrs tbf_queue(vifp, m); 1750163953Srrs timeout(tbf_reprocess_q, (caddr_t)vifp, TBF_REPROCESS); 1751163953Srrs } 1752163953Srrs } else if (t->tbf_q_len < t->tbf_max_q_len) { 1753163953Srrs /* finite queue length, so queue pkts and process queue */ 1754163953Srrs tbf_queue(vifp, m); 1755163953Srrs tbf_process_q(vifp); 1756163953Srrs } else { 1757163953Srrs /* queue length too much, try to dq and queue and process */ 1758163953Srrs if (!tbf_dq_sel(vifp, ip)) { 1759163953Srrs mrtstat.mrts_q_overflow++; 1760163953Srrs m_freem(m); 1761163953Srrs return; 1762163953Srrs } else { 1763163953Srrs tbf_queue(vifp, m); 1764165220Srrs tbf_process_q(vifp); 1765163953Srrs } 1766163953Srrs } 1767163953Srrs return; 1768163953Srrs} 1769163953Srrs 1770163953Srrs/* 1771163953Srrs * adds a packet to the queue at the interface 1772163953Srrs */ 1773163953Srrsstatic void 1774163953Srrstbf_queue(vifp, m) 1775163953Srrs register struct vif *vifp; 1776163953Srrs register struct mbuf *m; 1777163953Srrs{ 1778163953Srrs register int s = splnet(); 1779163953Srrs register struct tbf *t = vifp->v_tbf; 1780163953Srrs 1781163953Srrs if (t->tbf_t == NULL) { 1782163953Srrs /* Queue was empty */ 1783163953Srrs t->tbf_q = m; 1784163953Srrs } else { 1785163953Srrs /* Insert at tail */ 1786163953Srrs t->tbf_t->m_act = m; 1787163953Srrs } 1788163953Srrs 1789163953Srrs /* Set new tail pointer */ 1790163953Srrs t->tbf_t = m; 1791163953Srrs 1792163953Srrs#ifdef DIAGNOSTIC 1793163953Srrs /* Make sure we didn't get fed a bogus mbuf */ 1794163953Srrs if (m->m_act) 1795163953Srrs panic("tbf_queue: m_act"); 1796163953Srrs#endif 1797163953Srrs m->m_act = NULL; 1798163953Srrs 1799163953Srrs t->tbf_q_len++; 1800163953Srrs 1801163953Srrs splx(s); 1802163953Srrs} 1803163953Srrs 1804163953Srrs 1805163953Srrs/* 1806163953Srrs * processes the queue at the interface 1807165220Srrs */ 1808165220Srrsstatic void 1809165220Srrstbf_process_q(vifp) 1810163953Srrs register struct vif *vifp; 1811163953Srrs{ 1812163953Srrs register struct mbuf *m; 1813163953Srrs register int len; 1814163953Srrs register int s = splnet(); 1815163953Srrs register struct tbf *t = vifp->v_tbf; 1816163953Srrs 1817163953Srrs /* loop through the queue at the interface and send as many packets 1818163953Srrs * as possible 1819163953Srrs */ 1820163953Srrs while (t->tbf_q_len > 0) { 1821163953Srrs m = t->tbf_q; 1822163953Srrs 1823165220Srrs len = mtod(m, struct ip *)->ip_len; 1824163953Srrs 1825163953Srrs /* determine if the packet can be sent */ 1826163953Srrs if (len <= t->tbf_n_tok) { 1827163953Srrs /* if so, 1828163953Srrs * reduce no of tokens, dequeue the packet, 1829163953Srrs * send the packet. 1830163953Srrs */ 1831163953Srrs t->tbf_n_tok -= len; 1832163953Srrs 1833163953Srrs t->tbf_q = m->m_act; 1834163953Srrs if (--t->tbf_q_len == 0) 1835163953Srrs t->tbf_t = NULL; 1836163953Srrs 1837163953Srrs m->m_act = NULL; 1838163953Srrs tbf_send_packet(vifp, m); 1839163953Srrs 1840163953Srrs } else break; 1841163953Srrs } 1842163953Srrs splx(s); 1843163953Srrs} 1844163953Srrs 1845163953Srrsstatic void 1846163953Srrstbf_reprocess_q(xvifp) 1847163953Srrs void *xvifp; 1848163953Srrs{ 1849163953Srrs register struct vif *vifp = xvifp; 1850163953Srrs if (ip_mrouter == NULL) 1851163953Srrs return; 1852163953Srrs 1853163953Srrs tbf_update_tokens(vifp); 1854163953Srrs 1855163953Srrs tbf_process_q(vifp); 1856163953Srrs 1857163953Srrs if (vifp->v_tbf->tbf_q_len) 1858163953Srrs timeout(tbf_reprocess_q, (caddr_t)vifp, TBF_REPROCESS); 1859163953Srrs} 1860163953Srrs 1861163953Srrs/* function that will selectively discard a member of the queue 1862163953Srrs * based on the precedence value and the priority 1863163953Srrs */ 1864163953Srrsstatic int 1865163953Srrstbf_dq_sel(vifp, ip) 1866163953Srrs register struct vif *vifp; 1867163953Srrs register struct ip *ip; 1868163953Srrs{ 1869165647Srrs register int s = splnet(); 1870163953Srrs register u_int p; 1871163953Srrs register struct mbuf *m, *last; 1872163953Srrs register struct mbuf **np; 1873163953Srrs register struct tbf *t = vifp->v_tbf; 1874163953Srrs 1875163953Srrs p = priority(vifp, ip); 1876163953Srrs 1877163953Srrs np = &t->tbf_q; 1878163953Srrs last = NULL; 1879163953Srrs while ((m = *np) != NULL) { 1880163953Srrs if (p > priority(vifp, mtod(m, struct ip *))) { 1881163953Srrs *np = m->m_act; 1882166675Srrs /* If we're removing the last packet, fix the tail pointer */ 1883163953Srrs if (m == t->tbf_t) 1884163953Srrs t->tbf_t = last; 1885163953Srrs m_freem(m); 1886163953Srrs /* it's impossible for the queue to be empty, but 1887163953Srrs * we check anyway. */ 1888163953Srrs if (--t->tbf_q_len == 0) 1889163953Srrs t->tbf_t = NULL; 1890163953Srrs splx(s); 1891163953Srrs mrtstat.mrts_drop_sel++; 1892163953Srrs return(1); 1893163953Srrs } 1894163953Srrs np = &m->m_act; 1895163953Srrs last = m; 1896163953Srrs } 1897163953Srrs splx(s); 1898163953Srrs return(0); 1899163953Srrs} 1900163953Srrs 1901163953Srrsstatic void 1902163953Srrstbf_send_packet(vifp, m) 1903163953Srrs register struct vif *vifp; 1904163953Srrs register struct mbuf *m; 1905163953Srrs{ 1906163953Srrs struct ip_moptions imo; 1907163953Srrs int error; 1908163953Srrs static struct route ro; 1909163953Srrs int s = splnet(); 1910163953Srrs 1911163953Srrs if (vifp->v_flags & VIFF_TUNNEL) { 1912163953Srrs /* If tunnel options */ 1913163953Srrs ip_output(m, (struct mbuf *)0, &vifp->v_route, 1914163953Srrs IP_FORWARDING, (struct ip_moptions *)0); 1915163953Srrs } else { 1916163953Srrs imo.imo_multicast_ifp = vifp->v_ifp; 1917163953Srrs imo.imo_multicast_ttl = mtod(m, struct ip *)->ip_ttl - 1; 1918163953Srrs imo.imo_multicast_loop = 1; 1919163953Srrs imo.imo_multicast_vif = -1; 1920163953Srrs 1921163953Srrs /* 1922163953Srrs * Re-entrancy should not be a problem here, because 1923163953Srrs * the packets that we send out and are looped back at us 1924163953Srrs * should get rejected because they appear to come from 1925163953Srrs * the loopback interface, thus preventing looping. 1926163953Srrs */ 1927163953Srrs error = ip_output(m, (struct mbuf *)0, &ro, 1928163953Srrs IP_FORWARDING, &imo); 1929163953Srrs 1930163953Srrs if (mrtdebug & DEBUG_XMIT) 1931163953Srrs log(LOG_DEBUG, "phyint_send on vif %d err %d\n", 1932163953Srrs vifp - viftable, error); 1933163953Srrs } 1934163953Srrs splx(s); 1935163953Srrs} 1936163953Srrs 1937163953Srrs/* determine the current time and then 1938163953Srrs * the elapsed time (between the last time and time now) 1939163953Srrs * in milliseconds & update the no. of tokens in the bucket 1940163953Srrs */ 1941163953Srrsstatic void 1942163953Srrstbf_update_tokens(vifp) 1943163953Srrs register struct vif *vifp; 1944163953Srrs{ 1945163953Srrs struct timeval tp; 1946163953Srrs register u_long tm; 1947163953Srrs register int s = splnet(); 1948163953Srrs register struct tbf *t = vifp->v_tbf; 1949163953Srrs 1950163953Srrs GET_TIME(tp); 1951163953Srrs 1952163953Srrs TV_DELTA(tp, t->tbf_last_pkt_t, tm); 1953163953Srrs 1954163953Srrs /* 1955164085Srrs * This formula is actually 1956163953Srrs * "time in seconds" * "bytes/second". 1957163953Srrs * 1958163953Srrs * (tm / 1000000) * (v_rate_limit * 1000 * (1000/1024) / 8) 1959163953Srrs * 1960163953Srrs * The (1000/1024) was introduced in add_vif to optimize 1961163953Srrs * this divide into a shift. 1962163953Srrs */ 1963163953Srrs t->tbf_n_tok += tm * vifp->v_rate_limit / 1024 / 8; 1964163953Srrs t->tbf_last_pkt_t = tp; 1965163953Srrs 1966163953Srrs if (t->tbf_n_tok > MAX_BKT_SIZE) 1967163953Srrs t->tbf_n_tok = MAX_BKT_SIZE; 1968163953Srrs 1969163953Srrs splx(s); 1970163953Srrs} 1971163953Srrs 1972163953Srrsstatic int 1973163953Srrspriority(vifp, ip) 1974163953Srrs register struct vif *vifp; 1975163953Srrs register struct ip *ip; 1976163953Srrs{ 1977163953Srrs register int prio; 1978163953Srrs 1979163953Srrs /* temporary hack; may add general packet classifier some day */ 1980163953Srrs 1981163953Srrs /* 1982163953Srrs * The UDP port space is divided up into four priority ranges: 1983165647Srrs * [0, 16384) : unclassified - lowest priority 1984165647Srrs * [16384, 32768) : audio - highest priority 1985163953Srrs * [32768, 49152) : whiteboard - medium priority 1986165647Srrs * [49152, 65536) : video - low priority 1987163953Srrs */ 1988163953Srrs if (ip->ip_p == IPPROTO_UDP) { 1989163953Srrs struct udphdr *udp = (struct udphdr *)(((char *)ip) + (ip->ip_hl << 2)); 1990163953Srrs switch (ntohs(udp->uh_dport) & 0xc000) { 1991163953Srrs case 0x4000: 1992163953Srrs prio = 70; 1993163953Srrs break; 1994163953Srrs case 0x8000: 1995163953Srrs prio = 60; 1996163953Srrs break; 1997163953Srrs case 0xc000: 1998163953Srrs prio = 55; 1999163953Srrs break; 2000163953Srrs default: 2001163953Srrs prio = 50; 2002163953Srrs break; 2003163953Srrs } 2004163953Srrs if (tbfdebug > 1) 2005163953Srrs log(LOG_DEBUG, "port %x prio%d\n", ntohs(udp->uh_dport), prio); 2006163953Srrs } else { 2007163953Srrs prio = 50; 2008163953Srrs } 2009163953Srrs return prio; 2010163953Srrs} 2011163953Srrs 2012163953Srrs/* 2013165647Srrs * End of token bucket filter modifications 2014163953Srrs */ 2015163953Srrs 2016163953Srrsint 2017163953Srrsip_rsvp_vif_init(so, sopt) 2018163953Srrs struct socket *so; 2019165647Srrs struct sockopt *sopt; 2020165647Srrs{ 2021165647Srrs int error, i, s; 2022163953Srrs 2023163953Srrs if (rsvpdebug) 2024165647Srrs printf("ip_rsvp_vif_init: so_type = %d, pr_protocol = %d\n", 2025163953Srrs so->so_type, so->so_proto->pr_protocol); 2026163953Srrs 2027163953Srrs if (so->so_type != SOCK_RAW || so->so_proto->pr_protocol != IPPROTO_RSVP) 2028163953Srrs return EOPNOTSUPP; 2029163953Srrs 2030163953Srrs /* Check mbuf. */ 2031163953Srrs error = sooptcopyin(sopt, &i, sizeof i, sizeof i); 2032163953Srrs if (error) 2033163953Srrs return (error); 2034163953Srrs 2035163953Srrs if (rsvpdebug) 2036163953Srrs printf("ip_rsvp_vif_init: vif = %d rsvp_on = %d\n", i, rsvp_on); 2037163953Srrs 2038163953Srrs s = splnet(); 2039163953Srrs 2040163953Srrs /* Check vif. */ 2041163953Srrs if (!legal_vif_num(i)) { 2042163953Srrs splx(s); 2043163953Srrs return EADDRNOTAVAIL; 2044163953Srrs } 2045163953Srrs 2046163953Srrs /* Check if socket is available. */ 2047163953Srrs if (viftable[i].v_rsvpd != NULL) { 2048163953Srrs splx(s); 2049163953Srrs return EADDRINUSE; 2050163953Srrs } 2051163953Srrs 2052163953Srrs viftable[i].v_rsvpd = so; 2053163953Srrs /* This may seem silly, but we need to be sure we don't over-increment 2054163953Srrs * the RSVP counter, in case something slips up. 2055163953Srrs */ 2056163953Srrs if (!viftable[i].v_rsvp_on) { 2057163953Srrs viftable[i].v_rsvp_on = 1; 2058163953Srrs rsvp_on++; 2059163953Srrs } 2060163953Srrs 2061163953Srrs splx(s); 2062163953Srrs return 0; 2063163953Srrs} 2064163953Srrs 2065163953Srrsint 2066163953Srrsip_rsvp_vif_done(so, sopt) 2067163953Srrs struct socket *so; 2068163953Srrs struct sockopt *sopt; 2069163953Srrs{ 2070163953Srrs int error, i, s; 2071163953Srrs 2072163953Srrs if (rsvpdebug) 2073163953Srrs printf("ip_rsvp_vif_done: so_type = %d, pr_protocol = %d\n", 2074163953Srrs so->so_type, so->so_proto->pr_protocol); 2075163953Srrs 2076163953Srrs if (so->so_type != SOCK_RAW || 2077165220Srrs so->so_proto->pr_protocol != IPPROTO_RSVP) 2078165220Srrs return EOPNOTSUPP; 2079165220Srrs 2080165220Srrs error = sooptcopyin(sopt, &i, sizeof i, sizeof i); 2081165220Srrs if (error) 2082165220Srrs return (error); 2083165220Srrs 2084165220Srrs s = splnet(); 2085165220Srrs 2086165220Srrs /* Check vif. */ 2087165220Srrs if (!legal_vif_num(i)) { 2088165220Srrs splx(s); 2089165220Srrs return EADDRNOTAVAIL; 2090165220Srrs } 2091165220Srrs 2092165220Srrs if (rsvpdebug) 2093165220Srrs printf("ip_rsvp_vif_done: v_rsvpd = %p so = %p\n", 2094165220Srrs viftable[i].v_rsvpd, so); 2095165220Srrs 2096165220Srrs viftable[i].v_rsvpd = NULL; 2097165220Srrs /* 2098165220Srrs * This may seem silly, but we need to be sure we don't over-decrement 2099165220Srrs * the RSVP counter, in case something slips up. 2100165220Srrs */ 2101165220Srrs if (viftable[i].v_rsvp_on) { 2102163953Srrs viftable[i].v_rsvp_on = 0; 2103163953Srrs rsvp_on--; 2104163953Srrs } 2105163953Srrs 2106163953Srrs splx(s); 2107163953Srrs return 0; 2108163953Srrs} 2109163953Srrs 2110163953Srrsvoid 2111163953Srrsip_rsvp_force_done(so) 2112163953Srrs struct socket *so; 2113163953Srrs{ 2114163953Srrs int vifi; 2115163953Srrs register int s; 2116163953Srrs 2117163953Srrs /* Don't bother if it is not the right type of socket. */ 2118163953Srrs if (so->so_type != SOCK_RAW || so->so_proto->pr_protocol != IPPROTO_RSVP) 2119163953Srrs return; 2120163953Srrs 2121163953Srrs s = splnet(); 2122163953Srrs 2123163953Srrs /* The socket may be attached to more than one vif...this 2124163953Srrs * is perfectly legal. 2125163953Srrs */ 2126163953Srrs for (vifi = 0; vifi < numvifs; vifi++) { 2127163953Srrs if (viftable[vifi].v_rsvpd == so) { 2128163953Srrs viftable[vifi].v_rsvpd = NULL; 2129163953Srrs /* This may seem silly, but we need to be sure we don't 2130163953Srrs * over-decrement the RSVP counter, in case something slips up. 2131163953Srrs */ 2132163953Srrs if (viftable[vifi].v_rsvp_on) { 2133163953Srrs viftable[vifi].v_rsvp_on = 0; 2134165220Srrs rsvp_on--; 2135165220Srrs } 2136163953Srrs } 2137163953Srrs } 2138163953Srrs 2139163953Srrs splx(s); 2140163953Srrs return; 2141163953Srrs} 2142163953Srrs 2143163953Srrsvoid 2144163953Srrsrsvp_input(m, iphlen) 2145163953Srrs struct mbuf *m; 2146163953Srrs int iphlen; 2147163953Srrs{ 2148163953Srrs int vifi; 2149163953Srrs register struct ip *ip = mtod(m, struct ip *); 2150163953Srrs static struct sockaddr_in rsvp_src = { sizeof rsvp_src, AF_INET }; 2151163953Srrs register int s; 2152163953Srrs struct ifnet *ifp; 2153163953Srrs 2154163953Srrs if (rsvpdebug) 2155163953Srrs printf("rsvp_input: rsvp_on %d\n",rsvp_on); 2156163953Srrs 2157163953Srrs /* Can still get packets with rsvp_on = 0 if there is a local member 2158163953Srrs * of the group to which the RSVP packet is addressed. But in this 2159163953Srrs * case we want to throw the packet away. 2160163953Srrs */ 2161163953Srrs if (!rsvp_on) { 2162163953Srrs m_freem(m); 2163163953Srrs return; 2164163953Srrs } 2165163953Srrs 2166163953Srrs /* If the old-style non-vif-associated socket is set, then use 2167163953Srrs * it and ignore the new ones. 2168163953Srrs */ 2169163953Srrs if (ip_rsvpd != NULL) { 2170163953Srrs if (rsvpdebug) 2171163953Srrs printf("rsvp_input: Sending packet up old-style socket\n"); 2172163953Srrs rip_input(m, iphlen); 2173163953Srrs return; 2174163953Srrs } 2175163953Srrs 2176163953Srrs s = splnet(); 2177166086Srrs 2178163953Srrs if (rsvpdebug) 2179163953Srrs printf("rsvp_input: check vifs\n"); 2180163953Srrs 2181163953Srrs#ifdef DIAGNOSTIC 2182163953Srrs if (!(m->m_flags & M_PKTHDR)) 2183163953Srrs panic("rsvp_input no hdr"); 2184163953Srrs#endif 2185163953Srrs 2186163953Srrs ifp = m->m_pkthdr.rcvif; 2187163953Srrs /* Find which vif the packet arrived on. */ 2188163953Srrs for (vifi = 0; vifi < numvifs; vifi++) { 2189163953Srrs if (viftable[vifi].v_ifp == ifp) 2190163953Srrs break; 2191163953Srrs } 2192163953Srrs 2193163953Srrs if (vifi == numvifs) { 2194163953Srrs /* Can't find vif packet arrived on. Drop packet. */ 2195165220Srrs if (rsvpdebug) 2196163953Srrs printf("rsvp_input: Can't find vif for packet...dropping it.\n"); 2197163953Srrs m_freem(m); 2198163953Srrs splx(s); 2199166086Srrs return; 2200166086Srrs } 2201166086Srrs 2202166086Srrs if (rsvpdebug) 2203166086Srrs printf("rsvp_input: check socket\n"); 2204166086Srrs 2205163953Srrs if (viftable[vifi].v_rsvpd == NULL) { 2206163953Srrs /* drop packet, since there is no specific socket for this 2207163953Srrs * interface */ 2208166086Srrs if (rsvpdebug) 2209163953Srrs printf("rsvp_input: No socket defined for vif %d\n",vifi); 2210163953Srrs m_freem(m); 2211163953Srrs splx(s); 2212163953Srrs return; 2213163953Srrs } 2214163953Srrs rsvp_src.sin_addr = ip->ip_src; 2215163953Srrs 2216163953Srrs if (rsvpdebug && m) 2217163953Srrs printf("rsvp_input: m->m_len = %d, sbspace() = %ld\n", 2218163953Srrs m->m_len,sbspace(&(viftable[vifi].v_rsvpd->so_rcv))); 2219163953Srrs 2220163953Srrs if (socket_send(viftable[vifi].v_rsvpd, m, &rsvp_src) < 0) 2221163953Srrs if (rsvpdebug) 2222163953Srrs printf("rsvp_input: Failed to append to socket\n"); 2223163953Srrs else 2224163953Srrs if (rsvpdebug) 2225163953Srrs printf("rsvp_input: send packet up\n"); 2226163953Srrs 2227163953Srrs splx(s); 2228163953Srrs} 2229163953Srrs 2230163953Srrs#ifdef MROUTE_LKM 2231163953Srrs#include <sys/conf.h> 2232163953Srrs#include <sys/exec.h> 2233163953Srrs#include <sys/sysent.h> 2234163953Srrs#include <sys/lkm.h> 2235163953Srrs 2236163953SrrsMOD_MISC("ip_mroute_mod") 2237163953Srrs 2238163953Srrsstatic int 2239166086Srrsip_mroute_mod_handle(struct lkm_table *lkmtp, int cmd) 2240166086Srrs{ 2241166086Srrs int i; 2242166086Srrs struct lkm_misc *args = lkmtp->private.lkm_misc; 2243166086Srrs int err = 0; 2244166086Srrs 2245166086Srrs switch(cmd) { 2246166086Srrs static int (*old_ip_mrouter_cmd)(); 2247166086Srrs static int (*old_ip_mrouter_done)(); 2248166086Srrs static int (*old_ip_mforward)(); 2249166086Srrs static int (*old_mrt_ioctl)(); 2250166086Srrs static void (*old_proto4_input)(); 2251166086Srrs static int (*old_legal_vif_num)(); 2252166086Srrs extern struct protosw inetsw[]; 2253166086Srrs 2254163953Srrs case LKM_E_LOAD: 2255163953Srrs if(lkmexists(lkmtp) || ip_mrtproto) 2256166086Srrs return(EEXIST); 2257163953Srrs old_ip_mrouter_cmd = ip_mrouter_cmd; 2258166086Srrs ip_mrouter_cmd = X_ip_mrouter_cmd; 2259166086Srrs old_ip_mrouter_done = ip_mrouter_done; 2260166086Srrs ip_mrouter_done = X_ip_mrouter_done; 2261166086Srrs old_ip_mforward = ip_mforward; 2262166086Srrs ip_mforward = X_ip_mforward; 2263163953Srrs old_mrt_ioctl = mrt_ioctl; 2264163953Srrs mrt_ioctl = X_mrt_ioctl; 2265163953Srrs old_proto4_input = inetsw[ip_protox[ENCAP_PROTO]].pr_input; 2266163953Srrs inetsw[ip_protox[ENCAP_PROTO]].pr_input = X_ipip_input; 2267163953Srrs old_legal_vif_num = legal_vif_num; 2268163953Srrs legal_vif_num = X_legal_vif_num; 2269163953Srrs ip_mrtproto = IGMP_DVMRP; 2270163953Srrs 2271163953Srrs printf("\nIP multicast routing loaded\n"); 2272163953Srrs break; 2273163953Srrs 2274163953Srrs case LKM_E_UNLOAD: 2275163953Srrs if (ip_mrouter) 2276163953Srrs return EINVAL; 2277163953Srrs 2278163953Srrs ip_mrouter_cmd = old_ip_mrouter_cmd; 2279163953Srrs ip_mrouter_done = old_ip_mrouter_done; 2280163953Srrs ip_mforward = old_ip_mforward; 2281163953Srrs mrt_ioctl = old_mrt_ioctl; 2282163953Srrs inetsw[ip_protox[ENCAP_PROTO]].pr_input = old_proto4_input; 2283163953Srrs legal_vif_num = old_legal_vif_num; 2284163953Srrs ip_mrtproto = 0; 2285163953Srrs break; 2286163953Srrs 2287163953Srrs default: 2288163953Srrs err = EINVAL; 2289163953Srrs break; 2290163953Srrs } 2291163953Srrs 2292163953Srrs return(err); 2293163953Srrs} 2294163953Srrs 2295163953Srrsint 2296163953Srrsip_mroute_mod(struct lkm_table *lkmtp, int cmd, int ver) { 2297163953Srrs DISPATCH(lkmtp, cmd, ver, ip_mroute_mod_handle, ip_mroute_mod_handle, 2298163953Srrs nosys); 2299163953Srrs} 2300163953Srrs 2301163953Srrs#endif /* MROUTE_LKM */ 2302163953Srrs#endif /* MROUTING */ 2303163953Srrs