ip_mroute.c revision 14546
1177633Sdfr/* 2177633Sdfr * IP multicast forwarding procedures 3177633Sdfr * 4177633Sdfr * Written by David Waitzman, BBN Labs, August 1988. 5177633Sdfr * Modified by Steve Deering, Stanford, February 1989. 6177633Sdfr * Modified by Mark J. Steiglitz, Stanford, May, 1991 7177633Sdfr * Modified by Van Jacobson, LBL, January 1993 8177633Sdfr * Modified by Ajit Thyagarajan, PARC, August 1993 9177633Sdfr * Modified by Bill Fenner, PARC, April 1995 10177633Sdfr * 11177633Sdfr * MROUTING Revision: 3.5 12177633Sdfr * $Id: ip_mroute.c,v 1.28 1996/03/02 18:24:10 peter Exp $ 13177633Sdfr */ 14177633Sdfr 15177633Sdfr#include "opt_mrouting.h" 16177633Sdfr 17177633Sdfr#include <sys/param.h> 18177633Sdfr#include <sys/queue.h> 19177633Sdfr#include <sys/systm.h> 20177633Sdfr#include <sys/mbuf.h> 21177633Sdfr#include <sys/socket.h> 22177633Sdfr#include <sys/socketvar.h> 23177633Sdfr#include <sys/protosw.h> 24177633Sdfr#include <sys/errno.h> 25177633Sdfr#include <sys/time.h> 26177633Sdfr#include <sys/kernel.h> 27177633Sdfr#include <sys/ioctl.h> 28177633Sdfr#include <sys/syslog.h> 29177633Sdfr#include <net/if.h> 30177633Sdfr#include <net/route.h> 31177633Sdfr#include <netinet/in.h> 32177633Sdfr#include <netinet/in_systm.h> 33177633Sdfr#include <netinet/ip.h> 34177633Sdfr#include <netinet/ip_var.h> 35177633Sdfr#include <netinet/in_pcb.h> 36180025Sdfr#include <netinet/in_var.h> 37177633Sdfr#include <netinet/igmp.h> 38177633Sdfr#include <netinet/igmp_var.h> 39177633Sdfr#include <netinet/ip_mroute.h> 40177685Sdfr#include <netinet/udp.h> 41177633Sdfr 42177685Sdfrextern void rsvp_input __P((struct mbuf *m, int iphlen)); 43177633Sdfr 44177633Sdfr#ifndef NTOHL 45177633Sdfr#if BYTE_ORDER != BIG_ENDIAN 46177633Sdfr#define NTOHL(d) ((d) = ntohl((d))) 47177633Sdfr#define NTOHS(d) ((d) = ntohs((u_short)(d))) 48177633Sdfr#define HTONL(d) ((d) = htonl((d))) 49177633Sdfr#define HTONS(d) ((d) = htons((u_short)(d))) 50177633Sdfr#else 51177633Sdfr#define NTOHL(d) 52177633Sdfr#define NTOHS(d) 53177633Sdfr#define HTONL(d) 54177633Sdfr#define HTONS(d) 55180025Sdfr#endif 56180025Sdfr#endif 57180025Sdfr 58180025Sdfr#ifndef MROUTING 59177685Sdfrextern void ipip_input __P((struct mbuf *m)); 60177685Sdfrextern u_long _ip_mcast_src __P((int vifi)); 61177685Sdfrextern int _ip_mforward __P((struct ip *ip, struct ifnet *ifp, 62177633Sdfr struct mbuf *m, struct ip_moptions *imo)); 63177633Sdfrextern int _ip_mrouter_done __P((void)); 64177633Sdfrextern int _ip_mrouter_get __P((int cmd, struct socket *so, 65177633Sdfr struct mbuf **m)); 66177633Sdfrextern int _ip_mrouter_set __P((int cmd, struct socket *so, 67177633Sdfr struct mbuf *m)); 68177633Sdfrextern int _mrt_ioctl __P((int req, caddr_t data, struct proc *p)); 69177633Sdfr 70177633Sdfr/* 71177633Sdfr * Dummy routines and globals used when multicast routing is not compiled in. 72177633Sdfr */ 73177633Sdfr 74177633Sdfrstruct socket *ip_mrouter = NULL; 75177633Sdfrstatic u_int ip_mrtproto = 0; 76177633Sdfrstatic struct mrtstat mrtstat; 77177633Sdfru_int rsvpdebug = 0; 78177633Sdfr 79177633Sdfrint 80177633Sdfr_ip_mrouter_set(cmd, so, m) 81177633Sdfr int cmd; 82177633Sdfr struct socket *so; 83177633Sdfr struct mbuf *m; 84177633Sdfr{ 85177633Sdfr return(EOPNOTSUPP); 86177633Sdfr} 87177633Sdfr 88177633Sdfrint (*ip_mrouter_set)(int, struct socket *, struct mbuf *) = _ip_mrouter_set; 89177685Sdfr 90177685Sdfr 91177685Sdfrint 92177685Sdfr_ip_mrouter_get(cmd, so, m) 93177685Sdfr int cmd; 94177685Sdfr struct socket *so; 95177633Sdfr struct mbuf **m; 96177685Sdfr{ 97177633Sdfr return(EOPNOTSUPP); 98177633Sdfr} 99177633Sdfr 100177633Sdfrint (*ip_mrouter_get)(int, struct socket *, struct mbuf **) = _ip_mrouter_get; 101177633Sdfr 102177633Sdfrint 103177633Sdfr_ip_mrouter_done() 104177633Sdfr{ 105177633Sdfr return(0); 106177633Sdfr} 107177633Sdfr 108177633Sdfrint (*ip_mrouter_done)(void) = _ip_mrouter_done; 109177633Sdfr 110177633Sdfrint 111177633Sdfr_ip_mforward(ip, ifp, m, imo) 112177633Sdfr struct ip *ip; 113177633Sdfr struct ifnet *ifp; 114177633Sdfr struct mbuf *m; 115177633Sdfr struct ip_moptions *imo; 116177633Sdfr{ 117177633Sdfr return(0); 118177633Sdfr} 119177633Sdfr 120177633Sdfrint (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *, 121177633Sdfr struct ip_moptions *) = _ip_mforward; 122177633Sdfr 123177633Sdfrint 124177633Sdfr_mrt_ioctl(int req, caddr_t data, struct proc *p) 125177633Sdfr{ 126177633Sdfr return EOPNOTSUPP; 127177633Sdfr} 128177633Sdfr 129177633Sdfrint (*mrt_ioctl)(int, caddr_t, struct proc *) = _mrt_ioctl; 130177633Sdfr 131177633Sdfrvoid 132177633Sdfrrsvp_input(m, iphlen) /* XXX must fixup manually */ 133177633Sdfr struct mbuf *m; 134177633Sdfr int iphlen; 135177633Sdfr{ 136177633Sdfr /* Can still get packets with rsvp_on = 0 if there is a local member 137177633Sdfr * of the group to which the RSVP packet is addressed. But in this 138177633Sdfr * case we want to throw the packet away. 139180025Sdfr */ 140177633Sdfr if (!rsvp_on) { 141180025Sdfr m_freem(m); 142177633Sdfr return; 143177633Sdfr } 144180025Sdfr 145180025Sdfr if (ip_rsvpd != NULL) { 146180025Sdfr if (rsvpdebug) 147180025Sdfr printf("rsvp_input: Sending packet up old-style socket\n"); 148180025Sdfr rip_input(m); 149180025Sdfr return; 150180025Sdfr } 151180025Sdfr /* Drop the packet */ 152180025Sdfr m_freem(m); 153180025Sdfr} 154180025Sdfr 155180025Sdfrvoid ipip_input(struct mbuf *m) { /* XXX must fixup manually */ 156180025Sdfr rip_input(m); 157180025Sdfr} 158180025Sdfr 159180025Sdfrint (*legal_vif_num)(int) = 0; 160177633Sdfr 161177633Sdfr/* 162177633Sdfr * This should never be called, since IP_MULTICAST_VIF should fail, but 163180025Sdfr * just in case it does get called, the code a little lower in ip_output 164177633Sdfr * will assign the packet a local address. 165180025Sdfr */ 166177633Sdfru_long 167177633Sdfr_ip_mcast_src(int vifi) { return INADDR_ANY; } 168177633Sdfru_long (*ip_mcast_src)(int) = _ip_mcast_src; 169180025Sdfr 170180025Sdfrint 171177633Sdfrip_rsvp_vif_init(so, m) 172180025Sdfr struct socket *so; 173180025Sdfr struct mbuf *m; 174180025Sdfr{ 175180025Sdfr return(EINVAL); 176180025Sdfr} 177180025Sdfr 178180025Sdfrint 179180025Sdfrip_rsvp_vif_done(so, m) 180180025Sdfr struct socket *so; 181180025Sdfr struct mbuf *m; 182180025Sdfr{ 183180025Sdfr return(EINVAL); 184180025Sdfr} 185180025Sdfr 186180025Sdfrvoid 187177633Sdfrip_rsvp_force_done(so) 188177633Sdfr struct socket *so; 189177633Sdfr{ 190177633Sdfr return; 191177633Sdfr} 192177633Sdfr 193177633Sdfr#else /* MROUTING */ 194180025Sdfr 195177633Sdfr#define M_HASCL(m) ((m)->m_flags & M_EXT) 196177633Sdfr 197177633Sdfr#define INSIZ sizeof(struct in_addr) 198177633Sdfr#define same(a1, a2) \ 199177633Sdfr (bcmp((caddr_t)(a1), (caddr_t)(a2), INSIZ) == 0) 200177633Sdfr 201177633Sdfr#define MT_MRTABLE MT_RTABLE /* since nothing else uses it */ 202178112Sdfr 203178112Sdfr/* 204178112Sdfr * Globals. All but ip_mrouter and ip_mrtproto could be static, 205180025Sdfr * except for netstat or debugging purposes. 206180025Sdfr */ 207178112Sdfr#ifndef MROUTE_LKM 208177633Sdfrextern void ipip_input __P((struct mbuf *m, int iphlen)); 209177633Sdfrstruct socket *ip_mrouter = NULL; 210180025Sdfrstruct mrtstat mrtstat; 211180025Sdfr 212180025Sdfrint ip_mrtproto = IGMP_DVMRP; /* for netstat only */ 213177633Sdfr#else /* MROUTE_LKM */ 214177633Sdfr#error /* the function definition will have a syntax error */ 215177633Sdfrextern void X_ipip_input __P((struct mbuf *m)); 216180025Sdfrextern struct mrtstat mrtstat; 217177633Sdfrstatic int ip_mrtproto; 218177633Sdfr#endif 219180025Sdfr 220177633Sdfr#define NO_RTE_FOUND 0x1 221179425Sdfr#define RTE_FOUND 0x2 222177633Sdfr 223177633Sdfrstatic struct mbuf *mfctable[MFCTBLSIZ]; 224177633Sdfrstatic u_char nexpire[MFCTBLSIZ]; 225177633Sdfrstatic struct vif viftable[MAXVIFS]; 226177633Sdfrstatic u_int mrtdebug = 0; /* debug level */ 227177633Sdfr#define DEBUG_MFC 0x02 228180025Sdfr#define DEBUG_FORWARD 0x04 229180025Sdfr#define DEBUG_EXPIRE 0x08 230177633Sdfr#define DEBUG_XMIT 0x10 231177633Sdfrstatic u_int tbfdebug = 0; /* tbf debug level */ 232177633Sdfrstatic u_int rsvpdebug = 0; /* rsvp debug level */ 233177633Sdfr 234177633Sdfr#define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */ 235177633Sdfr#define UPCALL_EXPIRE 6 /* number of timeouts */ 236177633Sdfr 237177633Sdfr/* 238177633Sdfr * Define the token bucket filter structures 239177633Sdfr * tbftable -> each vif has one of these for storing info 240177633Sdfr */ 241177633Sdfr 242177633Sdfrstatic struct tbf tbftable[MAXVIFS]; 243180025Sdfr#define TBF_REPROCESS (hz / 100) /* 100x / second */ 244180025Sdfr 245177633Sdfr/* 246177633Sdfr * 'Interfaces' associated with decapsulator (so we can tell 247177633Sdfr * packets that went through it from ones that get reflected 248177633Sdfr * by a broken gateway). These interfaces are never linked into 249177633Sdfr * the system ifnet list & no routes point to them. I.e., packets 250177633Sdfr * can't be sent this way. They only exist as a placeholder for 251177633Sdfr * multicast source verification. 252177633Sdfr */ 253177633Sdfrstatic struct ifnet multicast_decap_if[MAXVIFS]; 254177633Sdfr 255177633Sdfr#define ENCAP_TTL 64 256177633Sdfr#define ENCAP_PROTO IPPROTO_IPIP /* 4 */ 257177633Sdfr 258177633Sdfr/* prototype IP hdr for encapsulated packets */ 259177633Sdfrstatic struct ip multicast_encap_iphdr = { 260177633Sdfr#if BYTE_ORDER == LITTLE_ENDIAN 261177633Sdfr sizeof(struct ip) >> 2, IPVERSION, 262177633Sdfr#else 263177633Sdfr IPVERSION, sizeof(struct ip) >> 2, 264177633Sdfr#endif 265177633Sdfr 0, /* tos */ 266177633Sdfr sizeof(struct ip), /* total length */ 267177633Sdfr 0, /* id */ 268177633Sdfr 0, /* frag offset */ 269177633Sdfr ENCAP_TTL, ENCAP_PROTO, 270177633Sdfr 0, /* checksum */ 271177633Sdfr}; 272177633Sdfr 273177633Sdfr/* 274177633Sdfr * Private variables. 275177633Sdfr */ 276177633Sdfrstatic vifi_t numvifs = 0; 277177633Sdfrstatic int have_encap_tunnel = 0; 278177633Sdfr 279177633Sdfr/* 280177633Sdfr * one-back cache used by ipip_input to locate a tunnel's vif 281177633Sdfr * given a datagram's src ip address. 282177633Sdfr */ 283177633Sdfrstatic u_long last_encap_src; 284177633Sdfrstatic struct vif *last_encap_vif; 285177633Sdfr 286177633Sdfrstatic u_long X_ip_mcast_src __P((int vifi)); 287177633Sdfrstatic int X_ip_mforward __P((struct ip *ip, struct ifnet *ifp, struct mbuf *m, struct ip_moptions *imo)); 288177633Sdfrstatic int X_ip_mrouter_done __P((void)); 289177633Sdfrstatic int X_ip_mrouter_get __P((int cmd, struct socket *so, struct mbuf **m)); 290177633Sdfrstatic int X_ip_mrouter_set __P((int cmd, struct socket *so, struct mbuf *m)); 291177633Sdfrstatic int X_legal_vif_num __P((int vif)); 292177633Sdfrstatic int X_mrt_ioctl __P((int cmd, caddr_t data)); 293177633Sdfr 294181683Sdfrstatic int get_sg_cnt(struct sioc_sg_req *); 295181683Sdfrstatic int get_vif_cnt(struct sioc_vif_req *); 296181683Sdfrstatic int ip_mrouter_init(struct socket *, struct mbuf *); 297182154Sdfrstatic int add_vif(struct vifctl *); 298181683Sdfrstatic int del_vif(vifi_t *); 299177633Sdfrstatic int add_mfc(struct mfcctl *); 300177633Sdfrstatic int del_mfc(struct mfcctl *); 301177633Sdfrstatic int socket_send(struct socket *, struct mbuf *, struct sockaddr_in *); 302177633Sdfrstatic int get_version(struct mbuf *); 303177633Sdfrstatic int get_assert(struct mbuf *); 304177633Sdfrstatic int set_assert(int *); 305177633Sdfrstatic void expire_upcalls(void *); 306177633Sdfrstatic int ip_mdq(struct mbuf *, struct ifnet *, struct mfc *, 307177633Sdfr vifi_t); 308177633Sdfrstatic void phyint_send(struct ip *, struct vif *, struct mbuf *); 309177633Sdfrstatic void encap_send(struct ip *, struct vif *, struct mbuf *); 310177633Sdfrstatic void tbf_control(struct vif *, struct mbuf *, struct ip *, u_long); 311177633Sdfrstatic void tbf_queue(struct vif *, struct mbuf *); 312177633Sdfrstatic void tbf_process_q(struct vif *); 313177633Sdfrstatic void tbf_reprocess_q(void *); 314177633Sdfrstatic int tbf_dq_sel(struct vif *, struct ip *); 315177633Sdfrstatic void tbf_send_packet(struct vif *, struct mbuf *); 316177633Sdfrstatic void tbf_update_tokens(struct vif *); 317177633Sdfrstatic int priority(struct vif *, struct ip *); 318177633Sdfrvoid multiencap_decap(struct mbuf *); 319177633Sdfr 320177633Sdfr/* 321177633Sdfr * whether or not special PIM assert processing is enabled. 322177633Sdfr */ 323177633Sdfrstatic int pim_assert; 324177633Sdfr/* 325177633Sdfr * Rate limit for assert notification messages, in usec 326177633Sdfr */ 327177633Sdfr#define ASSERT_MSG_TIME 3000000 328181683Sdfr 329177633Sdfr/* 330177633Sdfr * Hash function for a source, group entry 331177633Sdfr */ 332181683Sdfr#define MFCHASH(a, g) MFCHASHMOD(((a) >> 20) ^ ((a) >> 10) ^ (a) ^ \ 333177633Sdfr ((g) >> 20) ^ ((g) >> 10) ^ (g)) 334177633Sdfr 335181683Sdfr/* 336181683Sdfr * Find a route for a given origin IP address and Multicast group address 337181683Sdfr * Type of service parameter to be added in the future!!! 338181683Sdfr */ 339177633Sdfr 340177633Sdfr#define MFCFIND(o, g, rt) { \ 341177633Sdfr register struct mbuf *_mb_rt = mfctable[MFCHASH(o,g)]; \ 342177633Sdfr register struct mfc *_rt = NULL; \ 343177633Sdfr rt = NULL; \ 344177633Sdfr ++mrtstat.mrts_mfc_lookups; \ 345177633Sdfr while (_mb_rt) { \ 346177633Sdfr _rt = mtod(_mb_rt, struct mfc *); \ 347177633Sdfr if ((_rt->mfc_origin.s_addr == o) && \ 348181683Sdfr (_rt->mfc_mcastgrp.s_addr == g) && \ 349181683Sdfr (_mb_rt->m_act == NULL)) { \ 350181683Sdfr rt = _rt; \ 351177633Sdfr break; \ 352181683Sdfr } \ 353177633Sdfr _mb_rt = _mb_rt->m_next; \ 354181683Sdfr } \ 355181683Sdfr if (rt == NULL) { \ 356181683Sdfr ++mrtstat.mrts_mfc_misses; \ 357181683Sdfr } \ 358181683Sdfr} 359181683Sdfr 360181683Sdfr 361181683Sdfr/* 362181683Sdfr * Macros to compute elapsed time efficiently 363177633Sdfr * Borrowed from Van Jacobson's scheduling code 364177633Sdfr */ 365181683Sdfr#define TV_DELTA(a, b, delta) { \ 366181683Sdfr register int xxs; \ 367181683Sdfr \ 368181683Sdfr delta = (a).tv_usec - (b).tv_usec; \ 369181683Sdfr if ((xxs = (a).tv_sec - (b).tv_sec)) { \ 370181683Sdfr switch (xxs) { \ 371181683Sdfr case 2: \ 372181683Sdfr delta += 1000000; \ 373181683Sdfr /* fall through */ \ 374181683Sdfr case 1: \ 375181683Sdfr delta += 1000000; \ 376181683Sdfr break; \ 377181683Sdfr default: \ 378181683Sdfr delta += (1000000 * xxs); \ 379181683Sdfr } \ 380181683Sdfr } \ 381181683Sdfr} 382181683Sdfr 383177633Sdfr#define TV_LT(a, b) (((a).tv_usec < (b).tv_usec && \ 384181683Sdfr (a).tv_sec <= (b).tv_sec) || (a).tv_sec < (b).tv_sec) 385181683Sdfr 386177633Sdfr#ifdef UPCALL_TIMING 387177633Sdfru_long upcall_data[51]; 388177633Sdfrstatic void collate(struct timeval *); 389177633Sdfr#endif /* UPCALL_TIMING */ 390177633Sdfr 391181683Sdfr 392177633Sdfr/* 393177633Sdfr * Handle MRT setsockopt commands to modify the multicast routing tables. 394177633Sdfr */ 395182154Sdfrstatic int 396177633SdfrX_ip_mrouter_set(cmd, so, m) 397177633Sdfr int cmd; 398177633Sdfr struct socket *so; 399177633Sdfr struct mbuf *m; 400177633Sdfr{ 401177633Sdfr if (cmd != MRT_INIT && so != ip_mrouter) return EACCES; 402177633Sdfr 403177633Sdfr switch (cmd) { 404177633Sdfr case MRT_INIT: return ip_mrouter_init(so, m); 405177633Sdfr case MRT_DONE: return ip_mrouter_done(); 406177633Sdfr case MRT_ADD_VIF: return add_vif (mtod(m, struct vifctl *)); 407177633Sdfr case MRT_DEL_VIF: return del_vif (mtod(m, vifi_t *)); 408177633Sdfr case MRT_ADD_MFC: return add_mfc (mtod(m, struct mfcctl *)); 409177633Sdfr case MRT_DEL_MFC: return del_mfc (mtod(m, struct mfcctl *)); 410177633Sdfr case MRT_ASSERT: return set_assert(mtod(m, int *)); 411177633Sdfr default: return EOPNOTSUPP; 412177633Sdfr } 413181683Sdfr} 414181683Sdfr 415181683Sdfr#ifndef MROUTE_LKM 416177633Sdfrint (*ip_mrouter_set)(int, struct socket *, struct mbuf *) = X_ip_mrouter_set; 417181683Sdfr#endif 418181683Sdfr 419181683Sdfr/* 420181683Sdfr * Handle MRT getsockopt commands 421181683Sdfr */ 422181683Sdfrstatic int 423181683SdfrX_ip_mrouter_get(cmd, so, m) 424181683Sdfr int cmd; 425181683Sdfr struct socket *so; 426181683Sdfr struct mbuf **m; 427181683Sdfr{ 428181683Sdfr struct mbuf *mb; 429181683Sdfr 430181683Sdfr if (so != ip_mrouter) return EACCES; 431181683Sdfr 432181683Sdfr *m = mb = m_get(M_WAIT, MT_SOOPTS); 433181683Sdfr 434181683Sdfr switch (cmd) { 435181683Sdfr case MRT_VERSION: return get_version(mb); 436181683Sdfr case MRT_ASSERT: return get_assert(mb); 437181683Sdfr default: return EOPNOTSUPP; 438181683Sdfr } 439181683Sdfr} 440181683Sdfr 441181683Sdfr#ifndef MROUTE_LKM 442181683Sdfrint (*ip_mrouter_get)(int, struct socket *, struct mbuf **) = X_ip_mrouter_get; 443181683Sdfr#endif 444181683Sdfr 445181683Sdfr/* 446181683Sdfr * Handle ioctl commands to obtain information from the cache 447181683Sdfr */ 448181683Sdfrstatic int 449178241SdfrX_mrt_ioctl(cmd, data) 450177633Sdfr int cmd; 451177633Sdfr caddr_t data; 452177633Sdfr{ 453181683Sdfr int error = 0; 454181683Sdfr 455181683Sdfr switch (cmd) { 456181683Sdfr case (SIOCGETVIFCNT): 457181683Sdfr return (get_vif_cnt((struct sioc_vif_req *)data)); 458181683Sdfr break; 459177633Sdfr case (SIOCGETSGCNT): 460181683Sdfr return (get_sg_cnt((struct sioc_sg_req *)data)); 461181683Sdfr break; 462181683Sdfr default: 463181683Sdfr return (EINVAL); 464181683Sdfr break; 465181683Sdfr } 466181683Sdfr return error; 467181683Sdfr} 468181683Sdfr 469181683Sdfr#ifndef MROUTE_LKM 470181683Sdfrint (*mrt_ioctl)(int, caddr_t) = X_mrt_ioctl; 471181683Sdfr#endif 472181683Sdfr 473181683Sdfr/* 474181683Sdfr * returns the packet, byte, rpf-failure count for the source group provided 475181683Sdfr */ 476181683Sdfrstatic int 477181683Sdfrget_sg_cnt(req) 478181683Sdfr register struct sioc_sg_req *req; 479181683Sdfr{ 480181683Sdfr register struct mfc *rt; 481181683Sdfr int s; 482181683Sdfr 483181683Sdfr s = splnet(); 484181683Sdfr MFCFIND(req->src.s_addr, req->grp.s_addr, rt); 485181683Sdfr splx(s); 486181683Sdfr if (rt != NULL) { 487181683Sdfr req->pktcnt = rt->mfc_pkt_cnt; 488181683Sdfr req->bytecnt = rt->mfc_byte_cnt; 489177633Sdfr req->wrong_if = rt->mfc_wrong_if; 490177633Sdfr } else 491177633Sdfr req->pktcnt = req->bytecnt = req->wrong_if = 0xffffffff; 492177633Sdfr 493177633Sdfr return 0; 494177633Sdfr} 495177633Sdfr 496177633Sdfr/* 497177633Sdfr * returns the input and output packet and byte counts on the vif provided 498177633Sdfr */ 499177633Sdfrstatic int 500180025Sdfrget_vif_cnt(req) 501177633Sdfr register struct sioc_vif_req *req; 502177633Sdfr{ 503177633Sdfr register vifi_t vifi = req->vifi; 504177633Sdfr 505177633Sdfr if (vifi >= numvifs) return EINVAL; 506177633Sdfr 507177633Sdfr req->icount = viftable[vifi].v_pkt_in; 508177633Sdfr req->ocount = viftable[vifi].v_pkt_out; 509177633Sdfr req->ibytes = viftable[vifi].v_bytes_in; 510177633Sdfr req->obytes = viftable[vifi].v_bytes_out; 511178241Sdfr 512177633Sdfr return 0; 513177633Sdfr} 514177633Sdfr 515180025Sdfr/* 516180025Sdfr * Enable multicast routing 517177633Sdfr */ 518177633Sdfrstatic int 519180025Sdfrip_mrouter_init(so, m) 520177633Sdfr struct socket *so; 521177633Sdfr struct mbuf *m; 522177633Sdfr{ 523177633Sdfr int *v; 524177633Sdfr 525177633Sdfr if (mrtdebug) 526177633Sdfr log(LOG_DEBUG,"ip_mrouter_init: so_type = %d, pr_protocol = %d\n", 527177633Sdfr so->so_type, so->so_proto->pr_protocol); 528177633Sdfr 529177633Sdfr if (so->so_type != SOCK_RAW || 530177633Sdfr so->so_proto->pr_protocol != IPPROTO_IGMP) return EOPNOTSUPP; 531177633Sdfr 532177633Sdfr if (!m || (m->m_len != sizeof(int *))) 533177633Sdfr return ENOPROTOOPT; 534177633Sdfr 535177633Sdfr v = mtod(m, int *); 536177633Sdfr if (*v != 1) 537177633Sdfr return ENOPROTOOPT; 538180025Sdfr 539177633Sdfr if (ip_mrouter != NULL) return EADDRINUSE; 540177633Sdfr 541177633Sdfr ip_mrouter = so; 542177633Sdfr 543177633Sdfr bzero((caddr_t)mfctable, sizeof(mfctable)); 544177633Sdfr bzero((caddr_t)nexpire, sizeof(nexpire)); 545177633Sdfr 546177633Sdfr pim_assert = 0; 547177633Sdfr 548177633Sdfr timeout(expire_upcalls, (caddr_t)NULL, EXPIRE_TIMEOUT); 549177633Sdfr 550177633Sdfr if (mrtdebug) 551177633Sdfr log(LOG_DEBUG, "ip_mrouter_init\n"); 552177633Sdfr 553177633Sdfr return 0; 554177633Sdfr} 555177633Sdfr 556177633Sdfr/* 557177633Sdfr * Disable multicast routing 558177633Sdfr */ 559177633Sdfrstatic int 560177633SdfrX_ip_mrouter_done() 561177633Sdfr{ 562177633Sdfr vifi_t vifi; 563177633Sdfr int i; 564177633Sdfr struct ifnet *ifp; 565180025Sdfr struct ifreq ifr; 566180025Sdfr struct mbuf *mb_rt; 567177633Sdfr struct mbuf *m; 568177633Sdfr struct rtdetq *rte; 569177633Sdfr int s; 570177633Sdfr 571177633Sdfr s = splnet(); 572177633Sdfr 573177633Sdfr /* 574177633Sdfr * For each phyint in use, disable promiscuous reception of all IP 575177633Sdfr * multicasts. 576177633Sdfr */ 577177633Sdfr for (vifi = 0; vifi < numvifs; vifi++) { 578177633Sdfr if (viftable[vifi].v_lcl_addr.s_addr != 0 && 579177633Sdfr !(viftable[vifi].v_flags & VIFF_TUNNEL)) { 580177633Sdfr ((struct sockaddr_in *)&(ifr.ifr_addr))->sin_family = AF_INET; 581177633Sdfr ((struct sockaddr_in *)&(ifr.ifr_addr))->sin_addr.s_addr 582177633Sdfr = INADDR_ANY; 583177633Sdfr ifp = viftable[vifi].v_ifp; 584177633Sdfr (*ifp->if_ioctl)(ifp, SIOCDELMULTI, (caddr_t)&ifr); 585177633Sdfr } 586177633Sdfr } 587177633Sdfr bzero((caddr_t)tbftable, sizeof(tbftable)); 588177633Sdfr bzero((caddr_t)viftable, sizeof(viftable)); 589177633Sdfr numvifs = 0; 590177633Sdfr pim_assert = 0; 591177633Sdfr 592177633Sdfr untimeout(expire_upcalls, (caddr_t)NULL); 593177633Sdfr 594177633Sdfr /* 595177633Sdfr * Free all multicast forwarding cache entries. 596177633Sdfr */ 597177633Sdfr for (i = 0; i < MFCTBLSIZ; i++) { 598177633Sdfr mb_rt = mfctable[i]; 599177633Sdfr while (mb_rt) { 600177633Sdfr if (mb_rt->m_act != NULL) { 601177633Sdfr while (mb_rt->m_act) { 602177633Sdfr m = mb_rt->m_act; 603177633Sdfr mb_rt->m_act = m->m_act; 604177633Sdfr rte = mtod(m, struct rtdetq *); 605177633Sdfr m_freem(rte->m); 606177633Sdfr m_free(m); 607177633Sdfr } 608177633Sdfr } 609177633Sdfr mb_rt = m_free(mb_rt); 610177633Sdfr } 611177633Sdfr } 612177633Sdfr 613177633Sdfr bzero((caddr_t)mfctable, sizeof(mfctable)); 614177633Sdfr 615177633Sdfr /* 616177633Sdfr * Reset de-encapsulation cache 617177633Sdfr */ 618177633Sdfr last_encap_src = NULL; 619177633Sdfr last_encap_vif = NULL; 620177633Sdfr have_encap_tunnel = 0; 621177633Sdfr 622177633Sdfr ip_mrouter = NULL; 623177633Sdfr 624177633Sdfr splx(s); 625177633Sdfr 626177633Sdfr if (mrtdebug) 627177633Sdfr log(LOG_DEBUG, "ip_mrouter_done\n"); 628177633Sdfr 629177633Sdfr return 0; 630177633Sdfr} 631177633Sdfr 632177633Sdfr#ifndef MROUTE_LKM 633177633Sdfrint (*ip_mrouter_done)(void) = X_ip_mrouter_done; 634177633Sdfr#endif 635177633Sdfr 636177633Sdfrstatic int 637177633Sdfrget_version(mb) 638180025Sdfr struct mbuf *mb; 639180025Sdfr{ 640177633Sdfr int *v; 641177633Sdfr 642180025Sdfr v = mtod(mb, int *); 643177633Sdfr 644180025Sdfr *v = 0x0305; /* XXX !!!! */ 645180025Sdfr mb->m_len = sizeof(int); 646180025Sdfr 647180025Sdfr return 0; 648180025Sdfr} 649180025Sdfr 650180025Sdfr/* 651180025Sdfr * Set PIM assert processing global 652180025Sdfr */ 653180025Sdfrstatic int 654180025Sdfrset_assert(i) 655180025Sdfr int *i; 656180025Sdfr{ 657180025Sdfr if ((*i != 1) && (*i != 0)) 658180025Sdfr return EINVAL; 659180025Sdfr 660180025Sdfr pim_assert = *i; 661180025Sdfr 662180025Sdfr return 0; 663180025Sdfr} 664180025Sdfr 665180025Sdfr/* 666180025Sdfr * Get PIM assert processing global 667180025Sdfr */ 668180025Sdfrstatic int 669180025Sdfrget_assert(m) 670180025Sdfr struct mbuf *m; 671180025Sdfr{ 672180025Sdfr int *i; 673180025Sdfr 674180025Sdfr i = mtod(m, int *); 675180025Sdfr 676180025Sdfr *i = pim_assert; 677180025Sdfr 678180025Sdfr return 0; 679180025Sdfr} 680180025Sdfr 681180025Sdfr/* 682180025Sdfr * Add a vif to the vif table 683180025Sdfr */ 684180025Sdfrstatic int 685180025Sdfradd_vif(vifcp) 686180025Sdfr register struct vifctl *vifcp; 687180025Sdfr{ 688180025Sdfr register struct vif *vifp = viftable + vifcp->vifc_vifi; 689180025Sdfr static struct sockaddr_in sin = {sizeof sin, AF_INET}; 690177633Sdfr struct ifaddr *ifa; 691177633Sdfr struct ifnet *ifp; 692177633Sdfr struct ifreq ifr; 693177633Sdfr int error, s; 694177633Sdfr struct tbf *v_tbf = tbftable + vifcp->vifc_vifi; 695177633Sdfr 696177633Sdfr if (vifcp->vifc_vifi >= MAXVIFS) return EINVAL; 697177633Sdfr if (vifp->v_lcl_addr.s_addr != 0) return EADDRINUSE; 698177633Sdfr 699177633Sdfr /* Find the interface with an address in AF_INET family */ 700177633Sdfr sin.sin_addr = vifcp->vifc_lcl_addr; 701177633Sdfr ifa = ifa_ifwithaddr((struct sockaddr *)&sin); 702177633Sdfr if (ifa == 0) return EADDRNOTAVAIL; 703177633Sdfr ifp = ifa->ifa_ifp; 704177633Sdfr 705177633Sdfr if (vifcp->vifc_flags & VIFF_TUNNEL) { 706177633Sdfr if ((vifcp->vifc_flags & VIFF_SRCRT) == 0) { 707177633Sdfr /* 708177633Sdfr * An encapsulating tunnel is wanted. Tell ipip_input() to 709177633Sdfr * start paying attention to encapsulated packets. 710177633Sdfr */ 711177633Sdfr if (have_encap_tunnel == 0) { 712177633Sdfr have_encap_tunnel = 1; 713177633Sdfr for (s = 0; s < MAXVIFS; ++s) { 714180025Sdfr multicast_decap_if[s].if_name = "mdecap"; 715177633Sdfr multicast_decap_if[s].if_unit = s; 716177633Sdfr } 717177633Sdfr } 718177633Sdfr /* 719177633Sdfr * Set interface to fake encapsulator interface 720180025Sdfr */ 721180025Sdfr ifp = &multicast_decap_if[vifcp->vifc_vifi]; 722180025Sdfr /* 723177633Sdfr * Prepare cached route entry 724180025Sdfr */ 725180025Sdfr bzero(&vifp->v_route, sizeof(vifp->v_route)); 726180025Sdfr } else { 727180025Sdfr log(LOG_ERR, "source routed tunnels not supported\n"); 728180025Sdfr return EOPNOTSUPP; 729180025Sdfr } 730180025Sdfr } else { 731180025Sdfr /* Make sure the interface supports multicast */ 732177633Sdfr if ((ifp->if_flags & IFF_MULTICAST) == 0) 733177633Sdfr return EOPNOTSUPP; 734177633Sdfr 735177633Sdfr /* Enable promiscuous reception of all IP multicasts from the if */ 736177633Sdfr ((struct sockaddr_in *)&(ifr.ifr_addr))->sin_family = AF_INET; 737177633Sdfr ((struct sockaddr_in *)&(ifr.ifr_addr))->sin_addr.s_addr = INADDR_ANY; 738177633Sdfr s = splnet(); 739177633Sdfr error = (*ifp->if_ioctl)(ifp, SIOCADDMULTI, (caddr_t)&ifr); 740177633Sdfr splx(s); 741177633Sdfr if (error) 742177633Sdfr return error; 743177633Sdfr } 744177633Sdfr 745177633Sdfr s = splnet(); 746177633Sdfr /* define parameters for the tbf structure */ 747177633Sdfr vifp->v_tbf = v_tbf; 748177633Sdfr GET_TIME(vifp->v_tbf->tbf_last_pkt_t); 749177633Sdfr vifp->v_tbf->tbf_n_tok = 0; 750180025Sdfr vifp->v_tbf->tbf_q_len = 0; 751180025Sdfr vifp->v_tbf->tbf_max_q_len = MAXQSIZE; 752180025Sdfr vifp->v_tbf->tbf_q = vifp->v_tbf->tbf_t = NULL; 753180025Sdfr 754180025Sdfr vifp->v_flags = vifcp->vifc_flags; 755180025Sdfr vifp->v_threshold = vifcp->vifc_threshold; 756180025Sdfr vifp->v_lcl_addr = vifcp->vifc_lcl_addr; 757180025Sdfr vifp->v_rmt_addr = vifcp->vifc_rmt_addr; 758180025Sdfr vifp->v_ifp = ifp; 759180025Sdfr /* scaling up here allows division by 1024 in critical code */ 760180025Sdfr vifp->v_rate_limit= vifcp->vifc_rate_limit * 1024 / 1000; 761180025Sdfr vifp->v_rsvp_on = 0; 762180025Sdfr vifp->v_rsvpd = NULL; 763180025Sdfr /* initialize per vif pkt counters */ 764177633Sdfr vifp->v_pkt_in = 0; 765177633Sdfr vifp->v_pkt_out = 0; 766177633Sdfr vifp->v_bytes_in = 0; 767177633Sdfr vifp->v_bytes_out = 0; 768177633Sdfr splx(s); 769177633Sdfr 770177633Sdfr /* Adjust numvifs up if the vifi is higher than numvifs */ 771177633Sdfr if (numvifs <= vifcp->vifc_vifi) numvifs = vifcp->vifc_vifi + 1; 772180025Sdfr 773180025Sdfr if (mrtdebug) 774177633Sdfr log(LOG_DEBUG, "add_vif #%d, lcladdr %x, %s %x, thresh %x, rate %d\n", 775177633Sdfr vifcp->vifc_vifi, 776177633Sdfr ntohl(vifcp->vifc_lcl_addr.s_addr), 777180025Sdfr (vifcp->vifc_flags & VIFF_TUNNEL) ? "rmtaddr" : "mask", 778180025Sdfr ntohl(vifcp->vifc_rmt_addr.s_addr), 779180025Sdfr vifcp->vifc_threshold, 780177633Sdfr vifcp->vifc_rate_limit); 781180025Sdfr 782180025Sdfr return 0; 783177633Sdfr} 784177633Sdfr 785177633Sdfr/* 786177633Sdfr * Delete a vif from the vif table 787177633Sdfr */ 788177633Sdfrstatic int 789178112Sdfrdel_vif(vifip) 790177633Sdfr vifi_t *vifip; 791177633Sdfr{ 792177633Sdfr register struct vif *vifp = viftable + *vifip; 793177633Sdfr register vifi_t vifi; 794180025Sdfr register struct mbuf *m; 795180025Sdfr struct ifnet *ifp; 796177633Sdfr struct ifreq ifr; 797177633Sdfr int s; 798177633Sdfr 799177633Sdfr if (*vifip >= numvifs) return EINVAL; 800177633Sdfr if (vifp->v_lcl_addr.s_addr == 0) return EADDRNOTAVAIL; 801177633Sdfr 802177633Sdfr s = splnet(); 803177633Sdfr 804177633Sdfr if (!(vifp->v_flags & VIFF_TUNNEL)) { 805178112Sdfr ((struct sockaddr_in *)&(ifr.ifr_addr))->sin_family = AF_INET; 806177633Sdfr ((struct sockaddr_in *)&(ifr.ifr_addr))->sin_addr.s_addr = INADDR_ANY; 807177633Sdfr ifp = vifp->v_ifp; 808177633Sdfr (*ifp->if_ioctl)(ifp, SIOCDELMULTI, (caddr_t)&ifr); 809180025Sdfr } 810180025Sdfr 811180025Sdfr if (vifp == last_encap_vif) { 812177633Sdfr last_encap_vif = 0; 813180025Sdfr last_encap_src = 0; 814180025Sdfr } 815177633Sdfr 816177633Sdfr /* 817177633Sdfr * Free packets queued at the interface 818177633Sdfr */ 819177633Sdfr while (vifp->v_tbf->tbf_q) { 820177633Sdfr m = vifp->v_tbf->tbf_q; 821177633Sdfr vifp->v_tbf->tbf_q = m->m_act; 822177633Sdfr m_freem(m); 823177633Sdfr } 824177633Sdfr 825177633Sdfr bzero((caddr_t)vifp->v_tbf, sizeof(*(vifp->v_tbf))); 826177633Sdfr bzero((caddr_t)vifp, sizeof (*vifp)); 827177633Sdfr 828177633Sdfr /* Adjust numvifs down */ 829177633Sdfr for (vifi = numvifs; vifi > 0; vifi--) 830177633Sdfr if (viftable[vifi-1].v_lcl_addr.s_addr != 0) break; 831177633Sdfr numvifs = vifi; 832177633Sdfr 833177633Sdfr splx(s); 834177633Sdfr 835177633Sdfr if (mrtdebug) 836177633Sdfr log(LOG_DEBUG, "del_vif %d, numvifs %d\n", *vifip, numvifs); 837177633Sdfr 838177633Sdfr return 0; 839177633Sdfr} 840177633Sdfr 841177633Sdfr/* 842177633Sdfr * Add an mfc entry 843177633Sdfr */ 844177633Sdfrstatic int 845177633Sdfradd_mfc(mfccp) 846177633Sdfr struct mfcctl *mfccp; 847177633Sdfr{ 848177633Sdfr struct mfc *rt; 849177633Sdfr register struct mbuf *mb_rt; 850177633Sdfr u_long hash; 851177633Sdfr struct mbuf *mb_ntry; 852177633Sdfr struct rtdetq *rte; 853177633Sdfr register u_short nstl; 854177633Sdfr int s; 855177633Sdfr int i; 856177633Sdfr 857177633Sdfr MFCFIND(mfccp->mfcc_origin.s_addr, mfccp->mfcc_mcastgrp.s_addr, rt); 858177633Sdfr 859177633Sdfr /* If an entry already exists, just update the fields */ 860177633Sdfr if (rt) { 861177633Sdfr if (mrtdebug & DEBUG_MFC) 862180025Sdfr log(LOG_DEBUG,"add_mfc update o %x g %x p %x\n", 863180025Sdfr ntohl(mfccp->mfcc_origin.s_addr), 864177633Sdfr ntohl(mfccp->mfcc_mcastgrp.s_addr), 865177633Sdfr mfccp->mfcc_parent); 866177633Sdfr 867177633Sdfr s = splnet(); 868177633Sdfr rt->mfc_parent = mfccp->mfcc_parent; 869177633Sdfr for (i = 0; i < numvifs; i++) 870178112Sdfr rt->mfc_ttls[i] = mfccp->mfcc_ttls[i]; 871177633Sdfr splx(s); 872180025Sdfr return 0; 873180025Sdfr } 874180025Sdfr 875180025Sdfr /* 876177633Sdfr * Find the entry for which the upcall was made and update 877177633Sdfr */ 878180025Sdfr s = splnet(); 879177633Sdfr hash = MFCHASH(mfccp->mfcc_origin.s_addr, mfccp->mfcc_mcastgrp.s_addr); 880177633Sdfr for (mb_rt = mfctable[hash], nstl = 0; mb_rt; mb_rt = mb_rt->m_next) { 881177633Sdfr 882180025Sdfr rt = mtod(mb_rt, struct mfc *); 883177633Sdfr if ((rt->mfc_origin.s_addr == mfccp->mfcc_origin.s_addr) && 884177633Sdfr (rt->mfc_mcastgrp.s_addr == mfccp->mfcc_mcastgrp.s_addr) && 885177633Sdfr (mb_rt->m_act != NULL)) { 886177633Sdfr 887177633Sdfr if (nstl++) 888177633Sdfr log(LOG_ERR, "add_mfc %s o %x g %x p %x dbx %x\n", 889177633Sdfr "multiple kernel entries", 890180025Sdfr ntohl(mfccp->mfcc_origin.s_addr), 891177633Sdfr ntohl(mfccp->mfcc_mcastgrp.s_addr), 892180025Sdfr mfccp->mfcc_parent, mb_rt->m_act); 893180025Sdfr 894177633Sdfr if (mrtdebug & DEBUG_MFC) 895177633Sdfr log(LOG_DEBUG,"add_mfc o %x g %x p %x dbg %x\n", 896180025Sdfr ntohl(mfccp->mfcc_origin.s_addr), 897180025Sdfr ntohl(mfccp->mfcc_mcastgrp.s_addr), 898177633Sdfr mfccp->mfcc_parent, mb_rt->m_act); 899177633Sdfr 900177633Sdfr rt->mfc_origin = mfccp->mfcc_origin; 901180025Sdfr rt->mfc_mcastgrp = mfccp->mfcc_mcastgrp; 902177633Sdfr rt->mfc_parent = mfccp->mfcc_parent; 903177633Sdfr for (i = 0; i < numvifs; i++) 904177633Sdfr rt->mfc_ttls[i] = mfccp->mfcc_ttls[i]; 905177633Sdfr /* initialize pkt counters per src-grp */ 906177633Sdfr rt->mfc_pkt_cnt = 0; 907177633Sdfr rt->mfc_byte_cnt = 0; 908177633Sdfr rt->mfc_wrong_if = 0; 909177633Sdfr rt->mfc_last_assert.tv_sec = rt->mfc_last_assert.tv_usec = 0; 910177633Sdfr 911180025Sdfr rt->mfc_expire = 0; /* Don't clean this guy up */ 912177633Sdfr nexpire[hash]--; 913180025Sdfr 914180025Sdfr /* free packets Qed at the end of this entry */ 915180025Sdfr while (mb_rt->m_act) { 916180025Sdfr mb_ntry = mb_rt->m_act; 917180025Sdfr rte = mtod(mb_ntry, struct rtdetq *); 918180025Sdfr/* #ifdef RSVP_ISI */ 919180025Sdfr ip_mdq(rte->m, rte->ifp, rt, -1); 920177633Sdfr/* #endif */ 921177633Sdfr mb_rt->m_act = mb_ntry->m_act; 922177633Sdfr m_freem(rte->m); 923180025Sdfr#ifdef UPCALL_TIMING 924180025Sdfr collate(&(rte->t)); 925177633Sdfr#endif /* UPCALL_TIMING */ 926180025Sdfr m_free(mb_ntry); 927177633Sdfr } 928180025Sdfr } 929177633Sdfr } 930177633Sdfr 931177633Sdfr /* 932177633Sdfr * It is possible that an entry is being inserted without an upcall 933177633Sdfr */ 934177633Sdfr if (nstl == 0) { 935177633Sdfr if (mrtdebug & DEBUG_MFC) 936177633Sdfr log(LOG_DEBUG,"add_mfc no upcall h %d o %x g %x p %x\n", 937177633Sdfr hash, ntohl(mfccp->mfcc_origin.s_addr), 938177633Sdfr ntohl(mfccp->mfcc_mcastgrp.s_addr), 939180025Sdfr mfccp->mfcc_parent); 940180025Sdfr 941180025Sdfr for (mb_rt = mfctable[hash]; mb_rt; mb_rt = mb_rt->m_next) { 942180025Sdfr 943180025Sdfr rt = mtod(mb_rt, struct mfc *); 944177633Sdfr if ((rt->mfc_origin.s_addr == mfccp->mfcc_origin.s_addr) && 945180025Sdfr (rt->mfc_mcastgrp.s_addr == mfccp->mfcc_mcastgrp.s_addr)) { 946180025Sdfr 947180025Sdfr rt->mfc_origin = mfccp->mfcc_origin; 948180025Sdfr rt->mfc_mcastgrp = mfccp->mfcc_mcastgrp; 949177633Sdfr rt->mfc_parent = mfccp->mfcc_parent; 950177633Sdfr for (i = 0; i < numvifs; i++) 951180025Sdfr rt->mfc_ttls[i] = mfccp->mfcc_ttls[i]; 952180025Sdfr /* initialize pkt counters per src-grp */ 953177633Sdfr rt->mfc_pkt_cnt = 0; 954177633Sdfr rt->mfc_byte_cnt = 0; 955180025Sdfr rt->mfc_wrong_if = 0; 956180025Sdfr rt->mfc_last_assert.tv_sec = rt->mfc_last_assert.tv_usec = 0; 957180025Sdfr if (rt->mfc_expire) 958180025Sdfr nexpire[hash]--; 959177633Sdfr rt->mfc_expire = 0; 960177633Sdfr } 961177633Sdfr } 962177633Sdfr if (mb_rt == NULL) { 963177633Sdfr /* no upcall, so make a new entry */ 964177633Sdfr MGET(mb_rt, M_DONTWAIT, MT_MRTABLE); 965177633Sdfr if (mb_rt == NULL) { 966177633Sdfr splx(s); 967177633Sdfr return ENOBUFS; 968177633Sdfr } 969177633Sdfr 970177633Sdfr rt = mtod(mb_rt, struct mfc *); 971180025Sdfr 972180025Sdfr /* insert new entry at head of hash chain */ 973180025Sdfr rt->mfc_origin = mfccp->mfcc_origin; 974180025Sdfr rt->mfc_mcastgrp = mfccp->mfcc_mcastgrp; 975180025Sdfr rt->mfc_parent = mfccp->mfcc_parent; 976177633Sdfr for (i = 0; i < numvifs; i++) 977177633Sdfr rt->mfc_ttls[i] = mfccp->mfcc_ttls[i]; 978180025Sdfr /* initialize pkt counters per src-grp */ 979180025Sdfr rt->mfc_pkt_cnt = 0; 980180025Sdfr rt->mfc_byte_cnt = 0; 981180025Sdfr rt->mfc_wrong_if = 0; 982180025Sdfr rt->mfc_last_assert.tv_sec = rt->mfc_last_assert.tv_usec = 0; 983180025Sdfr rt->mfc_expire = 0; 984180025Sdfr 985180025Sdfr /* link into table */ 986180025Sdfr mb_rt->m_next = mfctable[hash]; 987180025Sdfr mfctable[hash] = mb_rt; 988180025Sdfr mb_rt->m_act = NULL; 989180025Sdfr } 990180025Sdfr } 991180025Sdfr splx(s); 992180025Sdfr return 0; 993180025Sdfr} 994177633Sdfr 995180025Sdfr#ifdef UPCALL_TIMING 996180025Sdfr/* 997180025Sdfr * collect delay statistics on the upcalls 998177633Sdfr */ 999177633Sdfrstatic void collate(t) 1000177633Sdfrregister struct timeval *t; 1001177633Sdfr{ 1002177633Sdfr register u_long d; 1003177633Sdfr register struct timeval tp; 1004177633Sdfr register u_long delta; 1005177633Sdfr 1006177633Sdfr GET_TIME(tp); 1007177633Sdfr 1008180025Sdfr if (TV_LT(*t, tp)) 1009180025Sdfr { 1010180025Sdfr TV_DELTA(tp, *t, delta); 1011180025Sdfr 1012177633Sdfr d = delta >> 10; 1013177633Sdfr if (d > 50) 1014177633Sdfr d = 50; 1015177633Sdfr 1016180025Sdfr ++upcall_data[d]; 1017180025Sdfr } 1018177633Sdfr} 1019177633Sdfr#endif /* UPCALL_TIMING */ 1020180025Sdfr 1021180025Sdfr/* 1022180025Sdfr * Delete an mfc entry 1023180025Sdfr */ 1024177633Sdfrstatic int 1025177633Sdfrdel_mfc(mfccp) 1026177633Sdfr struct mfcctl *mfccp; 1027177633Sdfr{ 1028177633Sdfr struct in_addr origin; 1029177633Sdfr struct in_addr mcastgrp; 1030177633Sdfr struct mfc *rt; 1031177633Sdfr struct mbuf *mb_rt; 1032177633Sdfr struct mbuf **nptr; 1033177633Sdfr u_long hash; 1034177633Sdfr int s; 1035177633Sdfr 1036177633Sdfr origin = mfccp->mfcc_origin; 1037180025Sdfr mcastgrp = mfccp->mfcc_mcastgrp; 1038180025Sdfr hash = MFCHASH(origin.s_addr, mcastgrp.s_addr); 1039177633Sdfr 1040180025Sdfr if (mrtdebug & DEBUG_MFC) 1041177633Sdfr log(LOG_DEBUG,"del_mfc orig %x mcastgrp %x\n", 1042177633Sdfr ntohl(origin.s_addr), ntohl(mcastgrp.s_addr)); 1043177633Sdfr 1044177633Sdfr s = splnet(); 1045177633Sdfr 1046180025Sdfr nptr = &mfctable[hash]; 1047180025Sdfr while ((mb_rt = *nptr) != NULL) { 1048180025Sdfr rt = mtod(mb_rt, struct mfc *); 1049180025Sdfr if (origin.s_addr == rt->mfc_origin.s_addr && 1050180025Sdfr mcastgrp.s_addr == rt->mfc_mcastgrp.s_addr && 1051180025Sdfr mb_rt->m_act == NULL) 1052180025Sdfr break; 1053180025Sdfr 1054180025Sdfr nptr = &mb_rt->m_next; 1055180025Sdfr } 1056177633Sdfr if (mb_rt == NULL) { 1057177633Sdfr splx(s); 1058177633Sdfr return EADDRNOTAVAIL; 1059177633Sdfr } 1060177633Sdfr 1061177633Sdfr MFREE(mb_rt, *nptr); 1062177633Sdfr 1063177633Sdfr splx(s); 1064177633Sdfr 1065177633Sdfr return 0; 1066177633Sdfr} 1067177633Sdfr 1068177633Sdfr/* 1069177633Sdfr * Send a message to mrouted on the multicast routing socket 1070177633Sdfr */ 1071177633Sdfrstatic int 1072177633Sdfrsocket_send(s, mm, src) 1073177633Sdfr struct socket *s; 1074177633Sdfr struct mbuf *mm; 1075177633Sdfr struct sockaddr_in *src; 1076177633Sdfr{ 1077177633Sdfr if (s) { 1078177633Sdfr if (sbappendaddr(&s->so_rcv, 1079177633Sdfr (struct sockaddr *)src, 1080177633Sdfr mm, (struct mbuf *)0) != 0) { 1081177633Sdfr sorwakeup(s); 1082177633Sdfr return 0; 1083177633Sdfr } 1084177633Sdfr } 1085177633Sdfr m_freem(mm); 1086177633Sdfr return -1; 1087177633Sdfr} 1088177633Sdfr 1089177633Sdfr/* 1090177633Sdfr * IP multicast forwarding function. This function assumes that the packet 1091177633Sdfr * pointed to by "ip" has arrived on (or is about to be sent to) the interface 1092177633Sdfr * pointed to by "ifp", and the packet is to be relayed to other networks 1093177633Sdfr * that have members of the packet's destination IP multicast group. 1094177633Sdfr * 1095177633Sdfr * The packet is returned unscathed to the caller, unless it is 1096177633Sdfr * erroneous, in which case a non-zero return value tells the caller to 1097177633Sdfr * discard it. 1098178112Sdfr */ 1099177633Sdfr 1100177633Sdfr#define IP_HDR_LEN 20 /* # bytes of fixed IP header (excluding options) */ 1101177633Sdfr#define TUNNEL_LEN 12 /* # bytes of IP option for tunnel encapsulation */ 1102177633Sdfr 1103177633Sdfrstatic int 1104177633SdfrX_ip_mforward(ip, ifp, m, imo) 1105180025Sdfr register struct ip *ip; 1106177633Sdfr struct ifnet *ifp; 1107177633Sdfr struct mbuf *m; 1108177633Sdfr struct ip_moptions *imo; 1109177633Sdfr{ 1110177633Sdfr register struct mfc *rt = 0; /* XXX uninit warning */ 1111177633Sdfr register u_char *ipoptions; 1112177633Sdfr static struct sockaddr_in k_igmpsrc = { sizeof k_igmpsrc, AF_INET }; 1113177633Sdfr static int srctun = 0; 1114177633Sdfr register struct mbuf *mm; 1115177633Sdfr int s; 1116177633Sdfr vifi_t vifi; 1117177633Sdfr struct vif *vifp; 1118177633Sdfr 1119177633Sdfr if (mrtdebug & DEBUG_FORWARD) 1120177633Sdfr log(LOG_DEBUG, "ip_mforward: src %x, dst %x, ifp %x\n", 1121177633Sdfr ntohl(ip->ip_src.s_addr), ntohl(ip->ip_dst.s_addr), ifp); 1122177633Sdfr 1123177633Sdfr if (ip->ip_hl < (IP_HDR_LEN + TUNNEL_LEN) >> 2 || 1124177633Sdfr (ipoptions = (u_char *)(ip + 1))[1] != IPOPT_LSRR ) { 1125180025Sdfr /* 1126180025Sdfr * Packet arrived via a physical interface or 1127180025Sdfr * an encapsulated tunnel. 1128177633Sdfr */ 1129180025Sdfr } else { 1130180025Sdfr /* 1131180025Sdfr * Packet arrived through a source-route tunnel. 1132177633Sdfr * Source-route tunnels are no longer supported. 1133177633Sdfr */ 1134177633Sdfr if ((srctun++ % 1000) == 0) 1135177633Sdfr log(LOG_ERR, "ip_mforward: received source-routed packet from %x\n", 1136177633Sdfr ntohl(ip->ip_src.s_addr)); 1137177633Sdfr 1138177633Sdfr return 1; 1139177633Sdfr } 1140177633Sdfr 1141177633Sdfr if ((imo) && ((vifi = imo->imo_multicast_vif) < numvifs)) { 1142177633Sdfr if (ip->ip_ttl < 255) 1143177633Sdfr ip->ip_ttl++; /* compensate for -1 in *_send routines */ 1144177633Sdfr if (rsvpdebug && ip->ip_p == IPPROTO_RSVP) { 1145177633Sdfr vifp = viftable + vifi; 1146177633Sdfr printf("Sending IPPROTO_RSVP from %lx to %lx on vif %d (%s%s%d)\n", 1147177633Sdfr ntohl(ip->ip_src.s_addr), ntohl(ip->ip_dst.s_addr), vifi, 1148177633Sdfr (vifp->v_flags & VIFF_TUNNEL) ? "tunnel on " : "", 1149177633Sdfr vifp->v_ifp->if_name, vifp->v_ifp->if_unit); 1150177633Sdfr } 1151177633Sdfr return (ip_mdq(m, ifp, rt, vifi)); 1152177633Sdfr } 1153177633Sdfr if (rsvpdebug && ip->ip_p == IPPROTO_RSVP) { 1154177633Sdfr printf("Warning: IPPROTO_RSVP from %lx to %lx without vif option\n", 1155177633Sdfr ntohl(ip->ip_src.s_addr), ntohl(ip->ip_dst.s_addr)); 1156177633Sdfr if(!imo) 1157177633Sdfr printf("In fact, no options were specified at all\n"); 1158177633Sdfr } 1159177633Sdfr 1160177633Sdfr /* 1161177633Sdfr * Don't forward a packet with time-to-live of zero or one, 1162180025Sdfr * or a packet destined to a local-only group. 1163178112Sdfr */ 1164180025Sdfr if (ip->ip_ttl <= 1 || 1165177633Sdfr ntohl(ip->ip_dst.s_addr) <= INADDR_MAX_LOCAL_GROUP) 1166177633Sdfr return 0; 1167177633Sdfr 1168178112Sdfr /* 1169177633Sdfr * Determine forwarding vifs from the forwarding cache table 1170177633Sdfr */ 1171177633Sdfr s = splnet(); 1172177633Sdfr MFCFIND(ip->ip_src.s_addr, ip->ip_dst.s_addr, rt); 1173177633Sdfr 1174177633Sdfr /* Entry exists, so forward if necessary */ 1175177633Sdfr if (rt != NULL) { 1176177633Sdfr splx(s); 1177177633Sdfr return (ip_mdq(m, ifp, rt, -1)); 1178180025Sdfr } else { 1179177633Sdfr /* 1180180025Sdfr * If we don't have a route for packet's origin, 1181180025Sdfr * Make a copy of the packet & 1182179425Sdfr * send message to routing daemon 1183180025Sdfr */ 1184179425Sdfr 1185179425Sdfr register struct mbuf *mb_rt; 1186179425Sdfr register struct mbuf *mb_ntry; 1187179425Sdfr register struct mbuf *mb0; 1188179425Sdfr register struct rtdetq *rte; 1189179425Sdfr register struct mbuf *rte_m; 1190179425Sdfr register u_long hash; 1191179425Sdfr register int npkts; 1192179425Sdfr#ifdef UPCALL_TIMING 1193180025Sdfr struct timeval tp; 1194180025Sdfr 1195180025Sdfr GET_TIME(tp); 1196179425Sdfr#endif 1197179425Sdfr 1198180025Sdfr mrtstat.mrts_no_route++; 1199180025Sdfr if (mrtdebug & (DEBUG_FORWARD | DEBUG_MFC)) 1200180025Sdfr log(LOG_DEBUG, "ip_mforward: no rte s %x g %x\n", 1201180025Sdfr ntohl(ip->ip_src.s_addr), 1202180025Sdfr ntohl(ip->ip_dst.s_addr)); 1203177633Sdfr 1204180025Sdfr /* 1205180025Sdfr * Allocate mbufs early so that we don't do extra work if we are 1206180025Sdfr * just going to fail anyway. 1207180025Sdfr */ 1208180025Sdfr MGET(mb_ntry, M_DONTWAIT, MT_DATA); 1209180025Sdfr if (mb_ntry == NULL) { 1210180025Sdfr splx(s); 1211180025Sdfr return ENOBUFS; 1212180025Sdfr } 1213180025Sdfr mb0 = m_copy(m, 0, M_COPYALL); 1214180025Sdfr if (mb0 == NULL) { 1215180025Sdfr m_free(mb_ntry); 1216180025Sdfr splx(s); 1217180025Sdfr return ENOBUFS; 1218180025Sdfr } 1219180025Sdfr 1220180025Sdfr /* is there an upcall waiting for this packet? */ 1221180025Sdfr hash = MFCHASH(ip->ip_src.s_addr, ip->ip_dst.s_addr); 1222180025Sdfr for (mb_rt = mfctable[hash]; mb_rt; mb_rt = mb_rt->m_next) { 1223180025Sdfr rt = mtod(mb_rt, struct mfc *); 1224180025Sdfr if ((ip->ip_src.s_addr == rt->mfc_origin.s_addr) && 1225180025Sdfr (ip->ip_dst.s_addr == rt->mfc_mcastgrp.s_addr) && 1226180025Sdfr (mb_rt->m_act != NULL)) 1227180025Sdfr break; 1228180025Sdfr } 1229180025Sdfr 1230180025Sdfr if (mb_rt == NULL) { 1231180025Sdfr int hlen = ip->ip_hl << 2; 1232180025Sdfr int i; 1233180025Sdfr struct igmpmsg *im; 1234180025Sdfr 1235180025Sdfr /* no upcall, so make a new entry */ 1236180025Sdfr MGET(mb_rt, M_DONTWAIT, MT_MRTABLE); 1237180025Sdfr if (mb_rt == NULL) { 1238180025Sdfr m_free(mb_ntry); 1239180025Sdfr m_freem(mb0); 1240180025Sdfr splx(s); 1241180025Sdfr return ENOBUFS; 1242180025Sdfr } 1243180025Sdfr /* Make a copy of the header to send to the user level process */ 1244180025Sdfr mm = m_copy(m, 0, hlen); 1245180025Sdfr if (mm && (M_HASCL(mm) || mm->m_len < hlen)) 1246180025Sdfr mm = m_pullup(mm, hlen); 1247180025Sdfr if (mm == NULL) { 1248180025Sdfr m_free(mb_ntry); 1249180025Sdfr m_freem(mb0); 1250180025Sdfr m_free(mb_rt); 1251180025Sdfr splx(s); 1252180025Sdfr return ENOBUFS; 1253180025Sdfr } 1254180025Sdfr 1255180025Sdfr /* 1256180025Sdfr * Send message to routing daemon to install 1257180025Sdfr * a route into the kernel table 1258180025Sdfr */ 1259180025Sdfr k_igmpsrc.sin_addr = ip->ip_src; 1260180025Sdfr 1261180025Sdfr im = mtod(mm, struct igmpmsg *); 1262180025Sdfr im->im_msgtype = IGMPMSG_NOCACHE; 1263180025Sdfr im->im_mbz = 0; 1264180025Sdfr 1265180025Sdfr mrtstat.mrts_upcalls++; 1266180025Sdfr 1267180025Sdfr if (socket_send(ip_mrouter, mm, &k_igmpsrc) < 0) { 1268180025Sdfr log(LOG_WARNING, "ip_mforward: ip_mrouter socket queue full\n"); 1269180025Sdfr ++mrtstat.mrts_upq_sockfull; 1270180025Sdfr m_free(mb_ntry); 1271180025Sdfr m_freem(mb0); 1272180025Sdfr m_free(mb_rt); 1273180025Sdfr splx(s); 1274180025Sdfr return ENOBUFS; 1275177633Sdfr } 1276180025Sdfr 1277180025Sdfr rt = mtod(mb_rt, struct mfc *); 1278177633Sdfr 1279180025Sdfr /* insert new entry at head of hash chain */ 1280180025Sdfr rt->mfc_origin.s_addr = ip->ip_src.s_addr; 1281180025Sdfr rt->mfc_mcastgrp.s_addr = ip->ip_dst.s_addr; 1282180025Sdfr rt->mfc_expire = UPCALL_EXPIRE; 1283180025Sdfr nexpire[hash]++; 1284180025Sdfr for (i = 0; i < numvifs; i++) 1285180025Sdfr rt->mfc_ttls[i] = 0; 1286180025Sdfr rt->mfc_parent = -1; 1287180025Sdfr 1288180025Sdfr /* link into table */ 1289180025Sdfr mb_rt->m_next = mfctable[hash]; 1290180025Sdfr mfctable[hash] = mb_rt; 1291180025Sdfr mb_rt->m_act = NULL; 1292180025Sdfr 1293180025Sdfr rte_m = mb_rt; 1294180025Sdfr } else { 1295180025Sdfr /* determine if q has overflowed */ 1296180025Sdfr for (rte_m = mb_rt, npkts = 0; rte_m->m_act; rte_m = rte_m->m_act) 1297180025Sdfr npkts++; 1298180025Sdfr 1299180025Sdfr if (npkts > MAX_UPQ) { 1300180025Sdfr mrtstat.mrts_upq_ovflw++; 1301180025Sdfr m_free(mb_ntry); 1302177633Sdfr m_freem(mb0); 1303180025Sdfr splx(s); 1304177633Sdfr return 0; 1305180025Sdfr } 1306180025Sdfr } 1307180025Sdfr 1308180025Sdfr mb_ntry->m_act = NULL; 1309180025Sdfr rte = mtod(mb_ntry, struct rtdetq *); 1310180025Sdfr 1311180025Sdfr rte->m = mb0; 1312180025Sdfr rte->ifp = ifp; 1313180025Sdfr#ifdef UPCALL_TIMING 1314180025Sdfr rte->t = tp; 1315180025Sdfr#endif 1316180025Sdfr 1317180025Sdfr /* Add this entry to the end of the queue */ 1318177633Sdfr rte_m->m_act = mb_ntry; 1319180025Sdfr 1320177633Sdfr splx(s); 1321177633Sdfr 1322180025Sdfr return 0; 1323177633Sdfr } 1324177633Sdfr} 1325177633Sdfr 1326177633Sdfr#ifndef MROUTE_LKM 1327177633Sdfrint (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *, 1328177633Sdfr struct ip_moptions *) = X_ip_mforward; 1329177633Sdfr#endif 1330177633Sdfr 1331177633Sdfr/* 1332177633Sdfr * Clean up the cache entry if upcall is not serviced 1333177633Sdfr */ 1334177633Sdfrstatic void 1335177633Sdfrexpire_upcalls(void *unused) 1336177633Sdfr{ 1337177633Sdfr struct mbuf *mb_rt, *m, **nptr; 1338177633Sdfr struct rtdetq *rte; 1339177633Sdfr struct mfc *mfc; 1340177633Sdfr int i; 1341177633Sdfr int s; 1342177633Sdfr 1343177633Sdfr s = splnet(); 1344177633Sdfr for (i = 0; i < MFCTBLSIZ; i++) { 1345177633Sdfr if (nexpire[i] == 0) 1346177633Sdfr continue; 1347177633Sdfr nptr = &mfctable[i]; 1348177633Sdfr for (mb_rt = *nptr; mb_rt != NULL; mb_rt = *nptr) { 1349177633Sdfr mfc = mtod(mb_rt, struct mfc *); 1350177633Sdfr 1351177633Sdfr /* 1352177633Sdfr * Skip real cache entries 1353177633Sdfr * Make sure it wasn't marked to not expire (shouldn't happen) 1354177633Sdfr * If it expires now 1355177633Sdfr */ 1356177633Sdfr if (mb_rt->m_act != NULL && 1357177633Sdfr mfc->mfc_expire != 0 && 1358177633Sdfr --mfc->mfc_expire == 0) { 1359177633Sdfr if (mrtdebug & DEBUG_EXPIRE) 1360177633Sdfr log(LOG_DEBUG, "expire_upcalls: expiring (%x %x)\n", 1361177633Sdfr ntohl(mfc->mfc_origin.s_addr), 1362177633Sdfr ntohl(mfc->mfc_mcastgrp.s_addr)); 1363177633Sdfr /* 1364177633Sdfr * drop all the packets 1365177633Sdfr * free the mbuf with the pkt, if, timing info 1366177633Sdfr */ 1367177633Sdfr while (mb_rt->m_act) { 1368177633Sdfr m = mb_rt->m_act; 1369177633Sdfr mb_rt->m_act = m->m_act; 1370177633Sdfr 1371177633Sdfr rte = mtod(m, struct rtdetq *); 1372177633Sdfr m_freem(rte->m); 1373177633Sdfr m_free(m); 1374177633Sdfr } 1375177633Sdfr ++mrtstat.mrts_cache_cleanups; 1376177633Sdfr nexpire[i]--; 1377177633Sdfr 1378177633Sdfr MFREE(mb_rt, *nptr); 1379177633Sdfr } else { 1380177633Sdfr nptr = &mb_rt->m_next; 1381177633Sdfr } 1382177633Sdfr } 1383177633Sdfr } 1384177633Sdfr splx(s); 1385177633Sdfr timeout(expire_upcalls, (caddr_t)NULL, EXPIRE_TIMEOUT); 1386177633Sdfr} 1387177633Sdfr 1388177633Sdfr/* 1389177633Sdfr * Packet forwarding routine once entry in the cache is made 1390177633Sdfr */ 1391177633Sdfrstatic int 1392177633Sdfrip_mdq(m, ifp, rt, xmt_vif) 1393177633Sdfr register struct mbuf *m; 1394177633Sdfr register struct ifnet *ifp; 1395177633Sdfr register struct mfc *rt; 1396177633Sdfr register vifi_t xmt_vif; 1397177633Sdfr{ 1398177633Sdfr register struct ip *ip = mtod(m, struct ip *); 1399177633Sdfr register vifi_t vifi; 1400177633Sdfr register struct vif *vifp; 1401177633Sdfr register int plen = ntohs(ip->ip_len); 1402177633Sdfr 1403177633Sdfr/* 1404177633Sdfr * Macro to send packet on vif. Since RSVP packets don't get counted on 1405177633Sdfr * input, they shouldn't get counted on output, so statistics keeping is 1406177633Sdfr * seperate. 1407177633Sdfr */ 1408177633Sdfr#define MC_SEND(ip,vifp,m) { \ 1409177633Sdfr if ((vifp)->v_flags & VIFF_TUNNEL) \ 1410177633Sdfr encap_send((ip), (vifp), (m)); \ 1411177633Sdfr else \ 1412177633Sdfr phyint_send((ip), (vifp), (m)); \ 1413177633Sdfr} 1414177633Sdfr 1415177633Sdfr /* 1416177633Sdfr * If xmt_vif is not -1, send on only the requested vif. 1417177633Sdfr * 1418177633Sdfr * (since vifi_t is u_short, -1 becomes MAXUSHORT, which > numvifs.) 1419177633Sdfr */ 1420177633Sdfr if (xmt_vif < numvifs) { 1421177633Sdfr MC_SEND(ip, viftable + xmt_vif, m); 1422177633Sdfr return 1; 1423177633Sdfr } 1424177633Sdfr 1425177633Sdfr /* 1426177633Sdfr * Don't forward if it didn't arrive from the parent vif for its origin. 1427177633Sdfr */ 1428177633Sdfr vifi = rt->mfc_parent; 1429178033Sdfr if ((vifi >= numvifs) || (viftable[vifi].v_ifp != ifp)) { 1430177633Sdfr /* came in the wrong interface */ 1431177633Sdfr if (mrtdebug & DEBUG_FORWARD) 1432177633Sdfr log(LOG_DEBUG, "wrong if: ifp %x vifi %d vififp %x\n", 1433177633Sdfr ifp, vifi, viftable[vifi].v_ifp); 1434177633Sdfr ++mrtstat.mrts_wrong_if; 1435177633Sdfr ++rt->mfc_wrong_if; 1436177633Sdfr /* 1437177633Sdfr * If we are doing PIM assert processing, and we are forwarding 1438177633Sdfr * packets on this interface, and it is a broadcast medium 1439177633Sdfr * interface (and not a tunnel), send a message to the routing daemon. 1440180025Sdfr */ 1441180025Sdfr if (pim_assert && rt->mfc_ttls[vifi] && 1442180025Sdfr (ifp->if_flags & IFF_BROADCAST) && 1443180025Sdfr !(viftable[vifi].v_flags & VIFF_TUNNEL)) { 1444180069Savatar struct sockaddr_in k_igmpsrc; 1445180069Savatar struct mbuf *mm; 1446180069Savatar struct igmpmsg *im; 1447180069Savatar int hlen = ip->ip_hl << 2; 1448177633Sdfr struct timeval now; 1449177633Sdfr register u_long delta; 1450177633Sdfr 1451177633Sdfr GET_TIME(now); 1452177633Sdfr 1453177633Sdfr TV_DELTA(rt->mfc_last_assert, now, delta); 1454177633Sdfr 1455177633Sdfr if (delta > ASSERT_MSG_TIME) { 1456177633Sdfr mm = m_copy(m, 0, hlen); 1457177633Sdfr if (mm && (M_HASCL(mm) || mm->m_len < hlen)) 1458177633Sdfr mm = m_pullup(mm, hlen); 1459177633Sdfr if (mm == NULL) { 1460177633Sdfr return ENOBUFS; 1461177633Sdfr } 1462177633Sdfr 1463177633Sdfr rt->mfc_last_assert = now; 1464177633Sdfr 1465177633Sdfr im = mtod(mm, struct igmpmsg *); 1466177633Sdfr im->im_msgtype = IGMPMSG_WRONGVIF; 1467177633Sdfr im->im_mbz = 0; 1468177633Sdfr im->im_vif = vifi; 1469177633Sdfr 1470177633Sdfr k_igmpsrc.sin_addr = im->im_src; 1471177633Sdfr 1472177633Sdfr socket_send(ip_mrouter, mm, &k_igmpsrc); 1473177633Sdfr } 1474177633Sdfr } 1475177633Sdfr return 0; 1476177633Sdfr } 1477180025Sdfr 1478177633Sdfr /* If I sourced this packet, it counts as output, else it was input. */ 1479177633Sdfr if (ip->ip_src.s_addr == viftable[vifi].v_lcl_addr.s_addr) { 1480177633Sdfr viftable[vifi].v_pkt_out++; 1481177633Sdfr viftable[vifi].v_bytes_out += plen; 1482177633Sdfr } else { 1483177633Sdfr viftable[vifi].v_pkt_in++; 1484177633Sdfr viftable[vifi].v_bytes_in += plen; 1485177633Sdfr } 1486177633Sdfr rt->mfc_pkt_cnt++; 1487177633Sdfr rt->mfc_byte_cnt += plen; 1488177633Sdfr 1489180025Sdfr /* 1490180025Sdfr * For each vif, decide if a copy of the packet should be forwarded. 1491177633Sdfr * Forward if: 1492177633Sdfr * - the ttl exceeds the vif's threshold 1493177633Sdfr * - there are group members downstream on interface 1494177633Sdfr */ 1495177633Sdfr for (vifp = viftable, vifi = 0; vifi < numvifs; vifp++, vifi++) 1496177633Sdfr if ((rt->mfc_ttls[vifi] > 0) && 1497177633Sdfr (ip->ip_ttl > rt->mfc_ttls[vifi])) { 1498177633Sdfr vifp->v_pkt_out++; 1499177633Sdfr vifp->v_bytes_out += plen; 1500177633Sdfr MC_SEND(ip, vifp, m); 1501178033Sdfr } 1502177633Sdfr 1503177633Sdfr return 0; 1504177633Sdfr} 1505177633Sdfr 1506177633Sdfr/* 1507177633Sdfr * check if a vif number is legal/ok. This is used by ip_output, to export 1508177633Sdfr * numvifs there, 1509177633Sdfr */ 1510177633Sdfrstatic int 1511178033SdfrX_legal_vif_num(vif) 1512178033Sdfr int vif; 1513177633Sdfr{ 1514177633Sdfr if (vif >= 0 && vif < numvifs) 1515177633Sdfr return(1); 1516177633Sdfr else 1517177633Sdfr return(0); 1518177633Sdfr} 1519177633Sdfr 1520177633Sdfr#ifndef MROUTE_LKM 1521177633Sdfrint (*legal_vif_num)(int) = X_legal_vif_num; 1522177633Sdfr#endif 1523177633Sdfr 1524177633Sdfr/* 1525177633Sdfr * Return the local address used by this vif 1526177633Sdfr */ 1527177633Sdfrstatic u_long 1528177633SdfrX_ip_mcast_src(vifi) 1529177633Sdfr int vifi; 1530177633Sdfr{ 1531177633Sdfr if (vifi >= 0 && vifi < numvifs) 1532177633Sdfr return viftable[vifi].v_lcl_addr.s_addr; 1533177633Sdfr else 1534177633Sdfr return INADDR_ANY; 1535177633Sdfr} 1536177633Sdfr 1537177633Sdfr#ifndef MROUTE_LKM 1538177633Sdfru_long (*ip_mcast_src)(int) = X_ip_mcast_src; 1539177633Sdfr#endif 1540177633Sdfr 1541177633Sdfrstatic void 1542180025Sdfrphyint_send(ip, vifp, m) 1543177633Sdfr struct ip *ip; 1544180025Sdfr struct vif *vifp; 1545180025Sdfr struct mbuf *m; 1546180025Sdfr{ 1547180025Sdfr register struct mbuf *mb_copy; 1548180025Sdfr register int hlen = ip->ip_hl << 2; 1549177633Sdfr 1550177633Sdfr /* 1551177633Sdfr * Make a new reference to the packet; make sure that 1552180025Sdfr * the IP header is actually copied, not just referenced, 1553180025Sdfr * so that ip_output() only scribbles on the copy. 1554180025Sdfr */ 1555177633Sdfr mb_copy = m_copy(m, 0, M_COPYALL); 1556177633Sdfr if (mb_copy && (M_HASCL(mb_copy) || mb_copy->m_len < hlen)) 1557177633Sdfr mb_copy = m_pullup(mb_copy, hlen); 1558177633Sdfr if (mb_copy == NULL) 1559177633Sdfr return; 1560180025Sdfr 1561177633Sdfr if (vifp->v_rate_limit <= 0) 1562177633Sdfr tbf_send_packet(vifp, mb_copy); 1563180025Sdfr else 1564177633Sdfr tbf_control(vifp, mb_copy, mtod(mb_copy, struct ip *), ip->ip_len); 1565177633Sdfr} 1566180025Sdfr 1567180025Sdfrstatic void 1568180025Sdfrencap_send(ip, vifp, m) 1569180025Sdfr register struct ip *ip; 1570180025Sdfr register struct vif *vifp; 1571180025Sdfr register struct mbuf *m; 1572180025Sdfr{ 1573180025Sdfr register struct mbuf *mb_copy; 1574180025Sdfr register struct ip *ip_copy; 1575180025Sdfr register int i, len = ip->ip_len; 1576180025Sdfr 1577180025Sdfr /* 1578180025Sdfr * copy the old packet & pullup it's IP header into the 1579180025Sdfr * new mbuf so we can modify it. Try to fill the new 1580180025Sdfr * mbuf since if we don't the ethernet driver will. 1581180025Sdfr */ 1582180025Sdfr MGET(mb_copy, M_DONTWAIT, MT_DATA); 1583180025Sdfr if (mb_copy == NULL) 1584180025Sdfr return; 1585180025Sdfr mb_copy->m_data += 16; 1586180025Sdfr mb_copy->m_len = sizeof(multicast_encap_iphdr); 1587180025Sdfr 1588180025Sdfr if ((mb_copy->m_next = m_copy(m, 0, M_COPYALL)) == NULL) { 1589177633Sdfr m_freem(mb_copy); 1590180025Sdfr return; 1591180025Sdfr } 1592180025Sdfr i = MHLEN - M_LEADINGSPACE(mb_copy); 1593180025Sdfr if (i > len) 1594180025Sdfr i = len; 1595180025Sdfr mb_copy = m_pullup(mb_copy, i); 1596180025Sdfr if (mb_copy == NULL) 1597180025Sdfr return; 1598180025Sdfr mb_copy->m_pkthdr.len = len + sizeof(multicast_encap_iphdr); 1599180025Sdfr 1600180025Sdfr /* 1601180025Sdfr * fill in the encapsulating IP header. 1602180025Sdfr */ 1603180025Sdfr ip_copy = mtod(mb_copy, struct ip *); 1604180025Sdfr *ip_copy = multicast_encap_iphdr; 1605180025Sdfr ip_copy->ip_id = htons(ip_id++); 1606180025Sdfr ip_copy->ip_len += len; 1607180025Sdfr ip_copy->ip_src = vifp->v_lcl_addr; 1608180025Sdfr ip_copy->ip_dst = vifp->v_rmt_addr; 1609180025Sdfr 1610180025Sdfr /* 1611180025Sdfr * turn the encapsulated IP header back into a valid one. 1612180025Sdfr */ 1613180025Sdfr ip = (struct ip *)((caddr_t)ip_copy + sizeof(multicast_encap_iphdr)); 1614180025Sdfr --ip->ip_ttl; 1615177633Sdfr HTONS(ip->ip_len); 1616180025Sdfr HTONS(ip->ip_off); 1617180025Sdfr ip->ip_sum = 0; 1618180025Sdfr#if defined(LBL) && !defined(ultrix) 1619180025Sdfr ip->ip_sum = ~oc_cksum((caddr_t)ip, ip->ip_hl << 2, 0); 1620177633Sdfr#else 1621177633Sdfr mb_copy->m_data += sizeof(multicast_encap_iphdr); 1622180025Sdfr ip->ip_sum = in_cksum(mb_copy, ip->ip_hl << 2); 1623180025Sdfr mb_copy->m_data -= sizeof(multicast_encap_iphdr); 1624177633Sdfr#endif 1625177633Sdfr 1626177633Sdfr if (vifp->v_rate_limit <= 0) 1627177633Sdfr tbf_send_packet(vifp, mb_copy); 1628177633Sdfr else 1629177633Sdfr tbf_control(vifp, mb_copy, ip, ip_copy->ip_len); 1630177633Sdfr} 1631177633Sdfr 1632177633Sdfr/* 1633177633Sdfr * De-encapsulate a packet and feed it back through ip input (this 1634177633Sdfr * routine is called whenever IP gets a packet with proto type 1635177685Sdfr * ENCAP_PROTO and a local destination address). 1636177633Sdfr */ 1637177685Sdfrvoid 1638177685Sdfr#ifdef MROUTE_LKM 1639177685SdfrX_ipip_input(m) 1640177633Sdfr#else 1641177633Sdfripip_input(m, iphlen) 1642177633Sdfr#endif 1643177633Sdfr register struct mbuf *m; 1644177633Sdfr int iphlen; 1645177633Sdfr{ 1646177633Sdfr struct ifnet *ifp = m->m_pkthdr.rcvif; 1647177633Sdfr register struct ip *ip = mtod(m, struct ip *); 1648177633Sdfr register int hlen = ip->ip_hl << 2; 1649177633Sdfr register int s; 1650177633Sdfr register struct ifqueue *ifq; 1651177633Sdfr register struct vif *vifp; 1652177633Sdfr 1653177633Sdfr if (!have_encap_tunnel) { 1654177633Sdfr rip_input(m); 1655177633Sdfr return; 1656177633Sdfr } 1657177633Sdfr /* 1658177633Sdfr * dump the packet if it's not to a multicast destination or if 1659177633Sdfr * we don't have an encapsulating tunnel with the source. 1660177633Sdfr * Note: This code assumes that the remote site IP address 1661177633Sdfr * uniquely identifies the tunnel (i.e., that this site has 1662177633Sdfr * at most one tunnel with the remote site). 1663177633Sdfr */ 1664177633Sdfr if (! IN_MULTICAST(ntohl(((struct ip *)((char *)ip + hlen))->ip_dst.s_addr))) { 1665177633Sdfr ++mrtstat.mrts_bad_tunnel; 1666177633Sdfr m_freem(m); 1667180025Sdfr return; 1668180025Sdfr } 1669180025Sdfr if (ip->ip_src.s_addr != last_encap_src) { 1670180025Sdfr register struct vif *vife; 1671177633Sdfr 1672177633Sdfr vifp = viftable; 1673177633Sdfr vife = vifp + numvifs; 1674177633Sdfr last_encap_src = ip->ip_src.s_addr; 1675177633Sdfr last_encap_vif = 0; 1676177633Sdfr for ( ; vifp < vife; ++vifp) 1677177633Sdfr if (vifp->v_rmt_addr.s_addr == ip->ip_src.s_addr) { 1678177633Sdfr if ((vifp->v_flags & (VIFF_TUNNEL|VIFF_SRCRT)) 1679177633Sdfr == VIFF_TUNNEL) 1680177633Sdfr last_encap_vif = vifp; 1681177633Sdfr break; 1682177633Sdfr } 1683178112Sdfr } 1684177633Sdfr if ((vifp = last_encap_vif) == 0) { 1685177633Sdfr last_encap_src = 0; 1686177633Sdfr mrtstat.mrts_cant_tunnel++; /*XXX*/ 1687177633Sdfr m_freem(m); 1688177633Sdfr if (mrtdebug) 1689177633Sdfr log(LOG_DEBUG, "ip_mforward: no tunnel with %x\n", 1690177633Sdfr ntohl(ip->ip_src.s_addr)); 1691177633Sdfr return; 1692177633Sdfr } 1693177633Sdfr ifp = vifp->v_ifp; 1694177633Sdfr 1695177633Sdfr if (hlen > IP_HDR_LEN) 1696177633Sdfr ip_stripoptions(m, (struct mbuf *) 0); 1697177633Sdfr m->m_data += IP_HDR_LEN; 1698177633Sdfr m->m_len -= IP_HDR_LEN; 1699177633Sdfr m->m_pkthdr.len -= IP_HDR_LEN; 1700177633Sdfr m->m_pkthdr.rcvif = ifp; 1701177633Sdfr 1702177633Sdfr ifq = &ipintrq; 1703177633Sdfr s = splimp(); 1704177633Sdfr if (IF_QFULL(ifq)) { 1705177633Sdfr IF_DROP(ifq); 1706177633Sdfr m_freem(m); 1707177633Sdfr } else { 1708177633Sdfr IF_ENQUEUE(ifq, m); 1709177633Sdfr /* 1710177633Sdfr * normally we would need a "schednetisr(NETISR_IP)" 1711177633Sdfr * here but we were called by ip_input and it is going 1712177633Sdfr * to loop back & try to dequeue the packet we just 1713177633Sdfr * queued as soon as we return so we avoid the 1714177633Sdfr * unnecessary software interrrupt. 1715178112Sdfr */ 1716177633Sdfr } 1717177633Sdfr splx(s); 1718177633Sdfr} 1719177633Sdfr 1720177633Sdfr/* 1721177633Sdfr * Token bucket filter module 1722177633Sdfr */ 1723177633Sdfr 1724177633Sdfrstatic void 1725177633Sdfrtbf_control(vifp, m, ip, p_len) 1726177633Sdfr register struct vif *vifp; 1727177633Sdfr register struct mbuf *m; 1728177633Sdfr register struct ip *ip; 1729177633Sdfr register u_long p_len; 1730177633Sdfr{ 1731177633Sdfr register struct tbf *t = vifp->v_tbf; 1732177633Sdfr 1733177633Sdfr if (p_len > MAX_BKT_SIZE) { 1734177633Sdfr /* drop if packet is too large */ 1735177633Sdfr mrtstat.mrts_pkt2large++; 1736178112Sdfr m_freem(m); 1737178112Sdfr return; 1738178112Sdfr } 1739178112Sdfr 1740178112Sdfr tbf_update_tokens(vifp); 1741178112Sdfr 1742178112Sdfr /* if there are enough tokens, 1743177633Sdfr * and the queue is empty, 1744177633Sdfr * send this packet out 1745177633Sdfr */ 1746177633Sdfr 1747177633Sdfr if (t->tbf_q_len == 0) { 1748177633Sdfr /* queue empty, send packet if enough tokens */ 1749177633Sdfr if (p_len <= t->tbf_n_tok) { 1750177633Sdfr t->tbf_n_tok -= p_len; 1751177633Sdfr tbf_send_packet(vifp, m); 1752177633Sdfr } else { 1753177633Sdfr /* queue packet and timeout till later */ 1754178112Sdfr tbf_queue(vifp, m); 1755178112Sdfr timeout(tbf_reprocess_q, (caddr_t)vifp, TBF_REPROCESS); 1756178112Sdfr } 1757178112Sdfr } else if (t->tbf_q_len < t->tbf_max_q_len) { 1758178112Sdfr /* finite queue length, so queue pkts and process queue */ 1759178112Sdfr tbf_queue(vifp, m); 1760177633Sdfr tbf_process_q(vifp); 1761177633Sdfr } else { 1762177633Sdfr /* queue length too much, try to dq and queue and process */ 1763177633Sdfr if (!tbf_dq_sel(vifp, ip)) { 1764177633Sdfr mrtstat.mrts_q_overflow++; 1765177633Sdfr m_freem(m); 1766177633Sdfr return; 1767177633Sdfr } else { 1768177633Sdfr tbf_queue(vifp, m); 1769177633Sdfr tbf_process_q(vifp); 1770177633Sdfr } 1771177633Sdfr } 1772177633Sdfr return; 1773177633Sdfr} 1774177633Sdfr 1775177633Sdfr/* 1776177633Sdfr * adds a packet to the queue at the interface 1777180025Sdfr */ 1778180025Sdfrstatic void 1779180025Sdfrtbf_queue(vifp, m) 1780177633Sdfr register struct vif *vifp; 1781177633Sdfr register struct mbuf *m; 1782177633Sdfr{ 1783177633Sdfr register int s = splnet(); 1784177633Sdfr register struct tbf *t = vifp->v_tbf; 1785177633Sdfr 1786177633Sdfr if (t->tbf_t == NULL) { 1787177633Sdfr /* Queue was empty */ 1788180025Sdfr t->tbf_q = m; 1789177633Sdfr } else { 1790180025Sdfr /* Insert at tail */ 1791180025Sdfr t->tbf_t->m_act = m; 1792177633Sdfr } 1793177633Sdfr 1794180025Sdfr /* Set new tail pointer */ 1795177633Sdfr t->tbf_t = m; 1796177633Sdfr 1797177633Sdfr#ifdef DIAGNOSTIC 1798177633Sdfr /* Make sure we didn't get fed a bogus mbuf */ 1799177633Sdfr if (m->m_act) 1800177633Sdfr panic("tbf_queue: m_act"); 1801177633Sdfr#endif 1802177633Sdfr m->m_act = NULL; 1803177633Sdfr 1804177633Sdfr t->tbf_q_len++; 1805177633Sdfr 1806177633Sdfr splx(s); 1807177633Sdfr} 1808177633Sdfr 1809180025Sdfr 1810177633Sdfr/* 1811177633Sdfr * processes the queue at the interface 1812177633Sdfr */ 1813177633Sdfrstatic void 1814177633Sdfrtbf_process_q(vifp) 1815177633Sdfr register struct vif *vifp; 1816177633Sdfr{ 1817177633Sdfr register struct mbuf *m; 1818177633Sdfr register int len; 1819177633Sdfr register int s = splnet(); 1820177633Sdfr register struct tbf *t = vifp->v_tbf; 1821177633Sdfr 1822177633Sdfr /* loop through the queue at the interface and send as many packets 1823177633Sdfr * as possible 1824177633Sdfr */ 1825177633Sdfr while (t->tbf_q_len > 0) { 1826177633Sdfr m = t->tbf_q; 1827177633Sdfr 1828177633Sdfr len = mtod(m, struct ip *)->ip_len; 1829177633Sdfr 1830177633Sdfr /* determine if the packet can be sent */ 1831177633Sdfr if (len <= t->tbf_n_tok) { 1832177633Sdfr /* if so, 1833177633Sdfr * reduce no of tokens, dequeue the packet, 1834177633Sdfr * send the packet. 1835177633Sdfr */ 1836177633Sdfr t->tbf_n_tok -= len; 1837177633Sdfr 1838177633Sdfr t->tbf_q = m->m_act; 1839177633Sdfr if (--t->tbf_q_len == 0) 1840177633Sdfr t->tbf_t = NULL; 1841177633Sdfr 1842177633Sdfr m->m_act = NULL; 1843177633Sdfr tbf_send_packet(vifp, m); 1844177633Sdfr 1845177633Sdfr } else break; 1846177633Sdfr } 1847177633Sdfr splx(s); 1848177633Sdfr} 1849177633Sdfr 1850177633Sdfrstatic void 1851177633Sdfrtbf_reprocess_q(xvifp) 1852177633Sdfr void *xvifp; 1853177633Sdfr{ 1854177633Sdfr register struct vif *vifp = xvifp; 1855177633Sdfr if (ip_mrouter == NULL) 1856177633Sdfr return; 1857177633Sdfr 1858177633Sdfr tbf_update_tokens(vifp); 1859177633Sdfr 1860180025Sdfr tbf_process_q(vifp); 1861177633Sdfr 1862177633Sdfr if (vifp->v_tbf->tbf_q_len) 1863177633Sdfr timeout(tbf_reprocess_q, (caddr_t)vifp, TBF_REPROCESS); 1864177633Sdfr} 1865177633Sdfr 1866177633Sdfr/* function that will selectively discard a member of the queue 1867177633Sdfr * based on the precedence value and the priority 1868180025Sdfr */ 1869180025Sdfrstatic int 1870180025Sdfrtbf_dq_sel(vifp, ip) 1871180025Sdfr register struct vif *vifp; 1872177633Sdfr register struct ip *ip; 1873177633Sdfr{ 1874180025Sdfr register int s = splnet(); 1875177633Sdfr register u_int p; 1876180025Sdfr register struct mbuf *m, *last; 1877177633Sdfr register struct mbuf **np; 1878177633Sdfr register struct tbf *t = vifp->v_tbf; 1879177633Sdfr 1880177633Sdfr p = priority(vifp, ip); 1881177633Sdfr 1882177633Sdfr np = &t->tbf_q; 1883177633Sdfr last = NULL; 1884177633Sdfr while ((m = *np) != NULL) { 1885180025Sdfr if (p > priority(vifp, mtod(m, struct ip *))) { 1886177633Sdfr *np = m->m_act; 1887180025Sdfr /* If we're removing the last packet, fix the tail pointer */ 1888180025Sdfr if (m == t->tbf_t) 1889177633Sdfr t->tbf_t = last; 1890177633Sdfr m_freem(m); 1891180025Sdfr /* it's impossible for the queue to be empty, but 1892177633Sdfr * we check anyway. */ 1893177633Sdfr if (--t->tbf_q_len == 0) 1894177633Sdfr t->tbf_t = NULL; 1895177633Sdfr splx(s); 1896177633Sdfr mrtstat.mrts_drop_sel++; 1897177633Sdfr return(1); 1898179488Sdfr } 1899179488Sdfr np = &m->m_act; 1900179488Sdfr last = m; 1901179488Sdfr } 1902179488Sdfr splx(s); 1903179488Sdfr return(0); 1904180025Sdfr} 1905179488Sdfr 1906179488Sdfrstatic void 1907177633Sdfrtbf_send_packet(vifp, m) 1908177633Sdfr register struct vif *vifp; 1909177633Sdfr register struct mbuf *m; 1910177633Sdfr{ 1911177633Sdfr struct ip_moptions imo; 1912177633Sdfr int error; 1913177633Sdfr int s = splnet(); 1914177633Sdfr 1915180025Sdfr if (vifp->v_flags & VIFF_TUNNEL) { 1916177633Sdfr /* If tunnel options */ 1917177633Sdfr ip_output(m, (struct mbuf *)0, (struct route *)0, 1918177633Sdfr IP_FORWARDING, (struct ip_moptions *)0); 1919177633Sdfr } else { 1920177633Sdfr imo.imo_multicast_ifp = vifp->v_ifp; 1921177633Sdfr imo.imo_multicast_ttl = mtod(m, struct ip *)->ip_ttl - 1; 1922177633Sdfr imo.imo_multicast_loop = 1; 1923177633Sdfr imo.imo_multicast_vif = -1; 1924177633Sdfr 1925177633Sdfr error = ip_output(m, (struct mbuf *)0, (struct route *)0, 1926177633Sdfr IP_FORWARDING, &imo); 1927177633Sdfr 1928177633Sdfr if (mrtdebug & DEBUG_XMIT) 1929177633Sdfr log(LOG_DEBUG, "phyint_send on vif %d err %d\n", 1930177633Sdfr vifp - viftable, error); 1931177633Sdfr } 1932177633Sdfr splx(s); 1933177633Sdfr} 1934177633Sdfr 1935180025Sdfr/* determine the current time and then 1936177633Sdfr * the elapsed time (between the last time and time now) 1937177633Sdfr * in milliseconds & update the no. of tokens in the bucket 1938177633Sdfr */ 1939177633Sdfrstatic void 1940180025Sdfrtbf_update_tokens(vifp) 1941180025Sdfr register struct vif *vifp; 1942177633Sdfr{ 1943177633Sdfr struct timeval tp; 1944177633Sdfr register u_long tm; 1945177633Sdfr register int s = splnet(); 1946177633Sdfr register struct tbf *t = vifp->v_tbf; 1947177633Sdfr 1948177633Sdfr GET_TIME(tp); 1949177633Sdfr 1950177633Sdfr TV_DELTA(tp, t->tbf_last_pkt_t, tm); 1951177633Sdfr 1952177633Sdfr /* 1953177633Sdfr * This formula is actually 1954177633Sdfr * "time in seconds" * "bytes/second". 1955177633Sdfr * 1956177633Sdfr * (tm / 1000000) * (v_rate_limit * 1000 * (1000/1024) / 8) 1957177633Sdfr * 1958177633Sdfr * The (1000/1024) was introduced in add_vif to optimize 1959177633Sdfr * this divide into a shift. 1960177633Sdfr */ 1961177633Sdfr t->tbf_n_tok += tm * vifp->v_rate_limit / 1024 / 8; 1962177633Sdfr t->tbf_last_pkt_t = tp; 1963180025Sdfr 1964177633Sdfr if (t->tbf_n_tok > MAX_BKT_SIZE) 1965177633Sdfr t->tbf_n_tok = MAX_BKT_SIZE; 1966177633Sdfr 1967177633Sdfr splx(s); 1968177633Sdfr} 1969177633Sdfr 1970177633Sdfrstatic int 1971177633Sdfrpriority(vifp, ip) 1972177633Sdfr register struct vif *vifp; 1973177633Sdfr register struct ip *ip; 1974180025Sdfr{ 1975177633Sdfr register int prio; 1976177633Sdfr 1977177633Sdfr /* temporary hack; may add general packet classifier some day */ 1978177633Sdfr 1979177633Sdfr /* 1980177633Sdfr * The UDP port space is divided up into four priority ranges: 1981177633Sdfr * [0, 16384) : unclassified - lowest priority 1982177633Sdfr * [16384, 32768) : audio - highest priority 1983177633Sdfr * [32768, 49152) : whiteboard - medium priority 1984177633Sdfr * [49152, 65536) : video - low priority 1985177633Sdfr */ 1986177633Sdfr if (ip->ip_p == IPPROTO_UDP) { 1987177633Sdfr struct udphdr *udp = (struct udphdr *)(((char *)ip) + (ip->ip_hl << 2)); 1988177633Sdfr switch (ntohs(udp->uh_dport) & 0xc000) { 1989177633Sdfr case 0x4000: 1990177633Sdfr prio = 70; 1991177633Sdfr break; 1992177633Sdfr case 0x8000: 1993177633Sdfr prio = 60; 1994177633Sdfr break; 1995177633Sdfr case 0xc000: 1996177633Sdfr prio = 55; 1997177633Sdfr break; 1998177633Sdfr default: 1999177633Sdfr prio = 50; 2000177633Sdfr break; 2001177633Sdfr } 2002177633Sdfr if (tbfdebug > 1) 2003177633Sdfr log(LOG_DEBUG, "port %x prio%d\n", ntohs(udp->uh_dport), prio); 2004177633Sdfr } else { 2005177633Sdfr prio = 50; 2006177633Sdfr } 2007177633Sdfr return prio; 2008177633Sdfr} 2009177633Sdfr 2010180025Sdfr/* 2011177633Sdfr * End of token bucket filter modifications 2012177633Sdfr */ 2013177633Sdfr 2014177633Sdfrint 2015177633Sdfrip_rsvp_vif_init(so, m) 2016177633Sdfr struct socket *so; 2017177633Sdfr struct mbuf *m; 2018177633Sdfr{ 2019177633Sdfr int i; 2020177633Sdfr register int s; 2021177633Sdfr 2022177633Sdfr if (rsvpdebug) 2023177633Sdfr printf("ip_rsvp_vif_init: so_type = %d, pr_protocol = %d\n", 2024177633Sdfr so->so_type, so->so_proto->pr_protocol); 2025177633Sdfr 2026177633Sdfr if (so->so_type != SOCK_RAW || so->so_proto->pr_protocol != IPPROTO_RSVP) 2027177633Sdfr return EOPNOTSUPP; 2028177633Sdfr 2029177633Sdfr /* Check mbuf. */ 2030177633Sdfr if (m == NULL || m->m_len != sizeof(int)) { 2031177633Sdfr return EINVAL; 2032177633Sdfr } 2033177633Sdfr i = *(mtod(m, int *)); 2034177633Sdfr 2035177633Sdfr if (rsvpdebug) 2036177633Sdfr printf("ip_rsvp_vif_init: vif = %d rsvp_on = %d\n",i,rsvp_on); 2037177633Sdfr 2038177633Sdfr s = splnet(); 2039177633Sdfr 2040177633Sdfr /* Check vif. */ 2041177633Sdfr if (!legal_vif_num(i)) { 2042177633Sdfr splx(s); 2043177633Sdfr return EADDRNOTAVAIL; 2044177633Sdfr } 2045177633Sdfr 2046177633Sdfr /* Check if socket is available. */ 2047177633Sdfr if (viftable[i].v_rsvpd != NULL) { 2048177633Sdfr splx(s); 2049177633Sdfr return EADDRINUSE; 2050177633Sdfr } 2051180025Sdfr 2052180025Sdfr viftable[i].v_rsvpd = so; 2053180025Sdfr /* This may seem silly, but we need to be sure we don't over-increment 2054180025Sdfr * the RSVP counter, in case something slips up. 2055177633Sdfr */ 2056177633Sdfr if (!viftable[i].v_rsvp_on) { 2057180025Sdfr viftable[i].v_rsvp_on = 1; 2058180025Sdfr rsvp_on++; 2059180025Sdfr } 2060177633Sdfr 2061177633Sdfr splx(s); 2062177633Sdfr return 0; 2063177633Sdfr} 2064177633Sdfr 2065177633Sdfrint 2066177633Sdfrip_rsvp_vif_done(so, m) 2067177633Sdfr struct socket *so; 2068177633Sdfr struct mbuf *m; 2069180025Sdfr{ 2070177633Sdfr int i; 2071180025Sdfr register int s; 2072180025Sdfr 2073177633Sdfr if (rsvpdebug) 2074177633Sdfr printf("ip_rsvp_vif_done: so_type = %d, pr_protocol = %d\n", 2075180025Sdfr so->so_type, so->so_proto->pr_protocol); 2076177633Sdfr 2077177633Sdfr if (so->so_type != SOCK_RAW || so->so_proto->pr_protocol != IPPROTO_RSVP) 2078177633Sdfr return EOPNOTSUPP; 2079177633Sdfr 2080177633Sdfr /* Check mbuf. */ 2081177633Sdfr if (m == NULL || m->m_len != sizeof(int)) { 2082177633Sdfr return EINVAL; 2083177633Sdfr } 2084177633Sdfr i = *(mtod(m, int *)); 2085177633Sdfr 2086177633Sdfr s = splnet(); 2087177633Sdfr 2088177633Sdfr /* Check vif. */ 2089177633Sdfr if (!legal_vif_num(i)) { 2090180025Sdfr splx(s); 2091177633Sdfr return EADDRNOTAVAIL; 2092177633Sdfr } 2093177633Sdfr 2094177633Sdfr if (rsvpdebug) 2095177633Sdfr printf("ip_rsvp_vif_done: v_rsvpd = %p so = %p\n", 2096177633Sdfr viftable[i].v_rsvpd, so); 2097177633Sdfr 2098177633Sdfr viftable[i].v_rsvpd = NULL; 2099177633Sdfr /* This may seem silly, but we need to be sure we don't over-decrement 2100177633Sdfr * the RSVP counter, in case something slips up. 2101177633Sdfr */ 2102177633Sdfr if (viftable[i].v_rsvp_on) { 2103177633Sdfr viftable[i].v_rsvp_on = 0; 2104177633Sdfr rsvp_on--; 2105177633Sdfr } 2106177633Sdfr 2107177633Sdfr splx(s); 2108177633Sdfr return 0; 2109177633Sdfr} 2110177633Sdfr 2111177633Sdfrvoid 2112177633Sdfrip_rsvp_force_done(so) 2113177633Sdfr struct socket *so; 2114177633Sdfr{ 2115177633Sdfr int vifi; 2116177633Sdfr register int s; 2117177633Sdfr 2118177633Sdfr /* Don't bother if it is not the right type of socket. */ 2119177633Sdfr if (so->so_type != SOCK_RAW || so->so_proto->pr_protocol != IPPROTO_RSVP) 2120177633Sdfr return; 2121177633Sdfr 2122177633Sdfr s = splnet(); 2123177633Sdfr 2124177633Sdfr /* The socket may be attached to more than one vif...this 2125177633Sdfr * is perfectly legal. 2126177633Sdfr */ 2127177633Sdfr for (vifi = 0; vifi < numvifs; vifi++) { 2128177633Sdfr if (viftable[vifi].v_rsvpd == so) { 2129177633Sdfr viftable[vifi].v_rsvpd = NULL; 2130177633Sdfr /* This may seem silly, but we need to be sure we don't 2131177633Sdfr * over-decrement the RSVP counter, in case something slips up. 2132177633Sdfr */ 2133177633Sdfr if (viftable[vifi].v_rsvp_on) { 2134177633Sdfr viftable[vifi].v_rsvp_on = 0; 2135177633Sdfr rsvp_on--; 2136177633Sdfr } 2137177633Sdfr } 2138177633Sdfr } 2139177633Sdfr 2140177633Sdfr splx(s); 2141177633Sdfr return; 2142180025Sdfr} 2143180025Sdfr 2144180025Sdfrvoid 2145180025Sdfrrsvp_input(m, iphlen) 2146177633Sdfr struct mbuf *m; 2147177633Sdfr int iphlen; 2148180025Sdfr{ 2149180025Sdfr int vifi; 2150180025Sdfr register struct ip *ip = mtod(m, struct ip *); 2151177633Sdfr static struct sockaddr_in rsvp_src = { sizeof rsvp_src, AF_INET }; 2152177633Sdfr register int s; 2153177633Sdfr struct ifnet *ifp; 2154177633Sdfr 2155177633Sdfr if (rsvpdebug) 2156177633Sdfr printf("rsvp_input: rsvp_on %d\n",rsvp_on); 2157177633Sdfr 2158177633Sdfr /* Can still get packets with rsvp_on = 0 if there is a local member 2159180025Sdfr * of the group to which the RSVP packet is addressed. But in this 2160177633Sdfr * case we want to throw the packet away. 2161180025Sdfr */ 2162180025Sdfr if (!rsvp_on) { 2163177633Sdfr m_freem(m); 2164177633Sdfr return; 2165180025Sdfr } 2166177633Sdfr 2167177633Sdfr /* If the old-style non-vif-associated socket is set, then use 2168177633Sdfr * it and ignore the new ones. 2169177633Sdfr */ 2170177633Sdfr if (ip_rsvpd != NULL) { 2171177633Sdfr if (rsvpdebug) 2172177633Sdfr printf("rsvp_input: Sending packet up old-style socket\n"); 2173177633Sdfr rip_input(m); 2174177633Sdfr return; 2175177633Sdfr } 2176177633Sdfr 2177177633Sdfr s = splnet(); 2178177633Sdfr 2179177633Sdfr if (rsvpdebug) 2180180025Sdfr printf("rsvp_input: check vifs\n"); 2181177633Sdfr 2182177633Sdfr#ifdef DIAGNOSTIC 2183177633Sdfr if (!(m->m_flags & M_PKTHDR)) 2184177633Sdfr panic("rsvp_input no hdr"); 2185177633Sdfr#endif 2186177633Sdfr 2187177633Sdfr ifp = m->m_pkthdr.rcvif; 2188177633Sdfr /* Find which vif the packet arrived on. */ 2189177633Sdfr for (vifi = 0; vifi < numvifs; vifi++) { 2190177633Sdfr if (viftable[vifi].v_ifp == ifp) 2191177633Sdfr break; 2192177633Sdfr } 2193177633Sdfr 2194177633Sdfr if (vifi == numvifs) { 2195177633Sdfr /* Can't find vif packet arrived on. Drop packet. */ 2196177633Sdfr if (rsvpdebug) 2197177633Sdfr printf("rsvp_input: Can't find vif for packet...dropping it.\n"); 2198177633Sdfr m_freem(m); 2199177633Sdfr splx(s); 2200177633Sdfr return; 2201177633Sdfr } 2202177633Sdfr 2203177633Sdfr if (rsvpdebug) 2204177633Sdfr printf("rsvp_input: check socket\n"); 2205180025Sdfr 2206180025Sdfr if (viftable[vifi].v_rsvpd == NULL) { 2207180025Sdfr /* drop packet, since there is no specific socket for this 2208180025Sdfr * interface */ 2209180025Sdfr if (rsvpdebug) 2210177633Sdfr printf("rsvp_input: No socket defined for vif %d\n",vifi); 2211180025Sdfr m_freem(m); 2212180025Sdfr splx(s); 2213180025Sdfr return; 2214180025Sdfr } 2215180025Sdfr rsvp_src.sin_addr = ip->ip_src; 2216180025Sdfr 2217180025Sdfr if (rsvpdebug && m) 2218180025Sdfr printf("rsvp_input: m->m_len = %d, sbspace() = %ld\n", 2219180025Sdfr m->m_len,sbspace(&(viftable[vifi].v_rsvpd->so_rcv))); 2220180025Sdfr 2221180025Sdfr if (socket_send(viftable[vifi].v_rsvpd, m, &rsvp_src) < 0) 2222180025Sdfr if (rsvpdebug) 2223180025Sdfr printf("rsvp_input: Failed to append to socket\n"); 2224180025Sdfr else 2225180025Sdfr if (rsvpdebug) 2226180025Sdfr printf("rsvp_input: send packet up\n"); 2227180025Sdfr 2228180025Sdfr splx(s); 2229180025Sdfr} 2230180025Sdfr 2231180025Sdfr#ifdef MROUTE_LKM 2232180025Sdfr#include <sys/conf.h> 2233180025Sdfr#include <sys/exec.h> 2234180025Sdfr#include <sys/sysent.h> 2235180025Sdfr#include <sys/lkm.h> 2236180025Sdfr 2237180025SdfrMOD_MISC("ip_mroute_mod") 2238180025Sdfr 2239180025Sdfrstatic int 2240180025Sdfrip_mroute_mod_handle(struct lkm_table *lkmtp, int cmd) 2241180025Sdfr{ 2242180025Sdfr int i; 2243180025Sdfr struct lkm_misc *args = lkmtp->private.lkm_misc; 2244180025Sdfr int err = 0; 2245180025Sdfr 2246180025Sdfr switch(cmd) { 2247180025Sdfr static int (*old_ip_mrouter_cmd)(); 2248180025Sdfr static int (*old_ip_mrouter_done)(); 2249180025Sdfr static int (*old_ip_mforward)(); 2250180025Sdfr static int (*old_mrt_ioctl)(); 2251180025Sdfr static void (*old_proto4_input)(); 2252180025Sdfr static int (*old_legal_vif_num)(); 2253177633Sdfr extern struct protosw inetsw[]; 2254177633Sdfr 2255177633Sdfr case LKM_E_LOAD: 2256177633Sdfr if(lkmexists(lkmtp) || ip_mrtproto) 2257177633Sdfr return(EEXIST); 2258177633Sdfr old_ip_mrouter_cmd = ip_mrouter_cmd; 2259177633Sdfr ip_mrouter_cmd = X_ip_mrouter_cmd; 2260177633Sdfr old_ip_mrouter_done = ip_mrouter_done; 2261177633Sdfr ip_mrouter_done = X_ip_mrouter_done; 2262180025Sdfr old_ip_mforward = ip_mforward; 2263177633Sdfr ip_mforward = X_ip_mforward; 2264177633Sdfr old_mrt_ioctl = mrt_ioctl; 2265177633Sdfr mrt_ioctl = X_mrt_ioctl; 2266177633Sdfr old_proto4_input = inetsw[ip_protox[ENCAP_PROTO]].pr_input; 2267177662Sdfr inetsw[ip_protox[ENCAP_PROTO]].pr_input = X_ipip_input; 2268177662Sdfr old_legal_vif_num = legal_vif_num; 2269177662Sdfr legal_vif_num = X_legal_vif_num; 2270177662Sdfr ip_mrtproto = IGMP_DVMRP; 2271177662Sdfr 2272177662Sdfr printf("\nIP multicast routing loaded\n"); 2273177662Sdfr break; 2274177662Sdfr 2275177662Sdfr case LKM_E_UNLOAD: 2276177662Sdfr if (ip_mrouter) 2277177662Sdfr return EINVAL; 2278177662Sdfr 2279177662Sdfr ip_mrouter_cmd = old_ip_mrouter_cmd; 2280177662Sdfr ip_mrouter_done = old_ip_mrouter_done; 2281177662Sdfr ip_mforward = old_ip_mforward; 2282177662Sdfr mrt_ioctl = old_mrt_ioctl; 2283177662Sdfr inetsw[ip_protox[ENCAP_PROTO]].pr_input = old_proto4_input; 2284180217Sdfr legal_vif_num = old_legal_vif_num; 2285177662Sdfr ip_mrtproto = 0; 2286 break; 2287 2288 default: 2289 err = EINVAL; 2290 break; 2291 } 2292 2293 return(err); 2294} 2295 2296int 2297ip_mroute_mod(struct lkm_table *lkmtp, int cmd, int ver) { 2298 DISPATCH(lkmtp, cmd, ver, ip_mroute_mod_handle, ip_mroute_mod_handle, 2299 nosys); 2300} 2301 2302#endif /* MROUTE_LKM */ 2303#endif /* MROUTING */ 2304