Annotation of sys/netinet/ip_mroute.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: ip_mroute.c,v 1.48 2007/05/22 09:51:13 michele Exp $ */
! 2: /* $NetBSD: ip_mroute.c,v 1.85 2004/04/26 01:31:57 matt Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1989 Stephen Deering
! 6: * Copyright (c) 1992, 1993
! 7: * The Regents of the University of California. All rights reserved.
! 8: *
! 9: * This code is derived from software contributed to Berkeley by
! 10: * Stephen Deering of Stanford University.
! 11: *
! 12: * Redistribution and use in source and binary forms, with or without
! 13: * modification, are permitted provided that the following conditions
! 14: * are met:
! 15: * 1. Redistributions of source code must retain the above copyright
! 16: * notice, this list of conditions and the following disclaimer.
! 17: * 2. Redistributions in binary form must reproduce the above copyright
! 18: * notice, this list of conditions and the following disclaimer in the
! 19: * documentation and/or other materials provided with the distribution.
! 20: * 3. Neither the name of the University nor the names of its contributors
! 21: * may be used to endorse or promote products derived from this software
! 22: * without specific prior written permission.
! 23: *
! 24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 34: * SUCH DAMAGE.
! 35: *
! 36: * @(#)ip_mroute.c 8.2 (Berkeley) 11/15/93
! 37: */
! 38:
! 39: /*
! 40: * IP multicast forwarding procedures
! 41: *
! 42: * Written by David Waitzman, BBN Labs, August 1988.
! 43: * Modified by Steve Deering, Stanford, February 1989.
! 44: * Modified by Mark J. Steiglitz, Stanford, May, 1991
! 45: * Modified by Van Jacobson, LBL, January 1993
! 46: * Modified by Ajit Thyagarajan, PARC, August 1993
! 47: * Modified by Bill Fenner, PARC, April 1994
! 48: * Modified by Charles M. Hannum, NetBSD, May 1995.
! 49: * Modified by Ahmed Helmy, SGI, June 1996
! 50: * Modified by George Edmond Eddy (Rusty), ISI, February 1998
! 51: * Modified by Pavlin Radoslavov, USC/ISI, May 1998, August 1999, October 2000
! 52: * Modified by Hitoshi Asaeda, WIDE, August 2000
! 53: * Modified by Pavlin Radoslavov, ICSI, October 2002
! 54: *
! 55: * MROUTING Revision: 1.2
! 56: * and PIM-SMv2 and PIM-DM support, advanced API support,
! 57: * bandwidth metering and signaling
! 58: */
! 59:
! 60: #ifdef PIM
! 61: #define _PIM_VT 1
! 62: #endif
! 63:
! 64: #include <sys/param.h>
! 65: #include <sys/systm.h>
! 66: #include <sys/mbuf.h>
! 67: #include <sys/socket.h>
! 68: #include <sys/socketvar.h>
! 69: #include <sys/protosw.h>
! 70: #include <sys/errno.h>
! 71: #include <sys/time.h>
! 72: #include <sys/kernel.h>
! 73: #include <sys/ioctl.h>
! 74: #include <sys/syslog.h>
! 75: #include <sys/timeout.h>
! 76:
! 77: #include <net/if.h>
! 78: #include <net/route.h>
! 79: #include <net/raw_cb.h>
! 80:
! 81: #include <netinet/in.h>
! 82: #include <netinet/in_var.h>
! 83: #include <netinet/in_systm.h>
! 84: #include <netinet/ip.h>
! 85: #include <netinet/ip_var.h>
! 86: #include <netinet/in_pcb.h>
! 87: #include <netinet/udp.h>
! 88: #include <netinet/igmp.h>
! 89: #include <netinet/igmp_var.h>
! 90: #include <netinet/ip_mroute.h>
! 91: #ifdef PIM
! 92: #include <netinet/pim.h>
! 93: #include <netinet/pim_var.h>
! 94: #endif
! 95:
! 96: #include <sys/stdarg.h>
! 97:
! 98: #define IP_MULTICASTOPTS 0
! 99: #define M_PULLUP(m, len) \
! 100: do { \
! 101: if ((m) && ((m)->m_flags & M_EXT || (m)->m_len < (len))) \
! 102: (m) = m_pullup((m), (len)); \
! 103: } while (/*CONSTCOND*/ 0)
! 104:
! 105: /*
! 106: * Globals. All but ip_mrouter and ip_mrtproto could be static,
! 107: * except for netstat or debugging purposes.
! 108: */
! 109: struct socket *ip_mrouter = NULL;
! 110: int ip_mrtproto = IGMP_DVMRP; /* for netstat only */
! 111:
! 112: #define NO_RTE_FOUND 0x1
! 113: #define RTE_FOUND 0x2
! 114:
! 115: #define MFCHASH(a, g) \
! 116: ((((a).s_addr >> 20) ^ ((a).s_addr >> 10) ^ (a).s_addr ^ \
! 117: ((g).s_addr >> 20) ^ ((g).s_addr >> 10) ^ (g).s_addr) & mfchash)
! 118: LIST_HEAD(mfchashhdr, mfc) *mfchashtbl;
! 119: u_long mfchash;
! 120:
! 121: u_char nexpire[MFCTBLSIZ];
! 122: struct vif viftable[MAXVIFS];
! 123: struct mrtstat mrtstat;
! 124: u_int mrtdebug = 0; /* debug level */
! 125: #define DEBUG_MFC 0x02
! 126: #define DEBUG_FORWARD 0x04
! 127: #define DEBUG_EXPIRE 0x08
! 128: #define DEBUG_XMIT 0x10
! 129: #define DEBUG_PIM 0x20
! 130:
! 131: #define VIFI_INVALID ((vifi_t) -1)
! 132:
! 133: u_int tbfdebug = 0; /* tbf debug level */
! 134: #ifdef RSVP_ISI
! 135: u_int rsvpdebug = 0; /* rsvp debug level */
! 136: extern struct socket *ip_rsvpd;
! 137: extern int rsvp_on;
! 138: #endif /* RSVP_ISI */
! 139:
! 140: #define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */
! 141: #define UPCALL_EXPIRE 6 /* number of timeouts */
! 142: struct timeout expire_upcalls_ch;
! 143:
! 144: /*
! 145: * Define the token bucket filter structures
! 146: */
! 147:
! 148: #define TBF_REPROCESS (hz / 100) /* 100x / second */
! 149:
! 150: static int get_sg_cnt(struct sioc_sg_req *);
! 151: static int get_vif_cnt(struct sioc_vif_req *);
! 152: static int ip_mrouter_init(struct socket *, struct mbuf *);
! 153: static int get_version(struct mbuf *);
! 154: static int set_assert(struct mbuf *);
! 155: static int get_assert(struct mbuf *);
! 156: static int add_vif(struct mbuf *);
! 157: static int del_vif(struct mbuf *);
! 158: static void update_mfc_params(struct mfc *, struct mfcctl2 *);
! 159: static void init_mfc_params(struct mfc *, struct mfcctl2 *);
! 160: static void expire_mfc(struct mfc *);
! 161: static int add_mfc(struct mbuf *);
! 162: #ifdef UPCALL_TIMING
! 163: static void collate(struct timeval *);
! 164: #endif
! 165: static int del_mfc(struct mbuf *);
! 166: static int set_api_config(struct mbuf *); /* chose API capabilities */
! 167: static int get_api_support(struct mbuf *);
! 168: static int get_api_config(struct mbuf *);
! 169: static int socket_send(struct socket *, struct mbuf *,
! 170: struct sockaddr_in *);
! 171: static void expire_upcalls(void *);
! 172: #ifdef RSVP_ISI
! 173: static int ip_mdq(struct mbuf *, struct ifnet *, struct mfc *, vifi_t);
! 174: #else
! 175: static int ip_mdq(struct mbuf *, struct ifnet *, struct mfc *);
! 176: #endif
! 177: static void phyint_send(struct ip *, struct vif *, struct mbuf *);
! 178: static void encap_send(struct ip *, struct vif *, struct mbuf *);
! 179: static void tbf_control(struct vif *, struct mbuf *, struct ip *,
! 180: u_int32_t);
! 181: static void tbf_queue(struct vif *, struct mbuf *);
! 182: static void tbf_process_q(struct vif *);
! 183: static void tbf_reprocess_q(void *);
! 184: static int tbf_dq_sel(struct vif *, struct ip *);
! 185: static void tbf_send_packet(struct vif *, struct mbuf *);
! 186: static void tbf_update_tokens(struct vif *);
! 187: static int priority(struct vif *, struct ip *);
! 188:
! 189: /*
! 190: * Bandwidth monitoring
! 191: */
! 192: static void free_bw_list(struct bw_meter *);
! 193: static int add_bw_upcall(struct mbuf *);
! 194: static int del_bw_upcall(struct mbuf *);
! 195: static void bw_meter_receive_packet(struct bw_meter *, int , struct timeval *);
! 196: static void bw_meter_prepare_upcall(struct bw_meter *, struct timeval *);
! 197: static void bw_upcalls_send(void);
! 198: static void schedule_bw_meter(struct bw_meter *, struct timeval *);
! 199: static void unschedule_bw_meter(struct bw_meter *);
! 200: static void bw_meter_process(void);
! 201: static void expire_bw_upcalls_send(void *);
! 202: static void expire_bw_meter_process(void *);
! 203:
! 204: #ifdef PIM
! 205: static int pim_register_send(struct ip *, struct vif *,
! 206: struct mbuf *, struct mfc *);
! 207: static int pim_register_send_rp(struct ip *, struct vif *,
! 208: struct mbuf *, struct mfc *);
! 209: static int pim_register_send_upcall(struct ip *, struct vif *,
! 210: struct mbuf *, struct mfc *);
! 211: static struct mbuf *pim_register_prepare(struct ip *, struct mbuf *);
! 212: #endif
! 213:
! 214: /*
! 215: * 'Interfaces' associated with decapsulator (so we can tell
! 216: * packets that went through it from ones that get reflected
! 217: * by a broken gateway). These interfaces are never linked into
! 218: * the system ifnet list & no routes point to them. I.e., packets
! 219: * can't be sent this way. They only exist as a placeholder for
! 220: * multicast source verification.
! 221: */
! 222: #if 0
! 223: struct ifnet multicast_decap_if[MAXVIFS];
! 224: #endif
! 225:
! 226: #define ENCAP_TTL 64
! 227: #define ENCAP_PROTO IPPROTO_IPIP /* 4 */
! 228:
! 229: /* prototype IP hdr for encapsulated packets */
! 230: struct ip multicast_encap_iphdr = {
! 231: #if BYTE_ORDER == LITTLE_ENDIAN
! 232: sizeof(struct ip) >> 2, IPVERSION,
! 233: #else
! 234: IPVERSION, sizeof(struct ip) >> 2,
! 235: #endif
! 236: 0, /* tos */
! 237: sizeof(struct ip), /* total length */
! 238: 0, /* id */
! 239: 0, /* frag offset */
! 240: ENCAP_TTL, ENCAP_PROTO,
! 241: 0, /* checksum */
! 242: };
! 243:
! 244: /*
! 245: * Bandwidth meter variables and constants
! 246: */
! 247:
! 248: /*
! 249: * Pending timeouts are stored in a hash table, the key being the
! 250: * expiration time. Periodically, the entries are analysed and processed.
! 251: */
! 252: #define BW_METER_BUCKETS 1024
! 253: static struct bw_meter *bw_meter_timers[BW_METER_BUCKETS];
! 254: struct timeout bw_meter_ch;
! 255: #define BW_METER_PERIOD (hz) /* periodical handling of bw meters */
! 256:
! 257: /*
! 258: * Pending upcalls are stored in a vector which is flushed when
! 259: * full, or periodically
! 260: */
! 261: static struct bw_upcall bw_upcalls[BW_UPCALLS_MAX];
! 262: static u_int bw_upcalls_n; /* # of pending upcalls */
! 263: struct timeout bw_upcalls_ch;
! 264: #define BW_UPCALLS_PERIOD (hz) /* periodical flush of bw upcalls */
! 265:
! 266: #ifdef PIM
! 267: struct pimstat pimstat;
! 268:
! 269: /*
! 270: * Note: the PIM Register encapsulation adds the following in front of a
! 271: * data packet:
! 272: *
! 273: * struct pim_encap_hdr {
! 274: * struct ip ip;
! 275: * struct pim_encap_pimhdr pim;
! 276: * }
! 277: *
! 278: */
! 279:
! 280: struct pim_encap_pimhdr {
! 281: struct pim pim;
! 282: uint32_t flags;
! 283: };
! 284:
! 285: static struct ip pim_encap_iphdr = {
! 286: #if BYTE_ORDER == LITTLE_ENDIAN
! 287: sizeof(struct ip) >> 2,
! 288: IPVERSION,
! 289: #else
! 290: IPVERSION,
! 291: sizeof(struct ip) >> 2,
! 292: #endif
! 293: 0, /* tos */
! 294: sizeof(struct ip), /* total length */
! 295: 0, /* id */
! 296: 0, /* frag offset */
! 297: ENCAP_TTL,
! 298: IPPROTO_PIM,
! 299: 0, /* checksum */
! 300: };
! 301:
! 302: static struct pim_encap_pimhdr pim_encap_pimhdr = {
! 303: {
! 304: PIM_MAKE_VT(PIM_VERSION, PIM_REGISTER), /* PIM vers and message type */
! 305: 0, /* reserved */
! 306: 0, /* checksum */
! 307: },
! 308: 0 /* flags */
! 309: };
! 310:
! 311: static struct ifnet multicast_register_if;
! 312: static vifi_t reg_vif_num = VIFI_INVALID;
! 313: #endif /* PIM */
! 314:
! 315:
! 316: /*
! 317: * Private variables.
! 318: */
! 319: static vifi_t numvifs = 0;
! 320: static int have_encap_tunnel = 0;
! 321:
! 322: /*
! 323: * whether or not special PIM assert processing is enabled.
! 324: */
! 325: static int pim_assert;
! 326: /*
! 327: * Rate limit for assert notification messages, in usec
! 328: */
! 329: #define ASSERT_MSG_TIME 3000000
! 330:
! 331: /*
! 332: * Kernel multicast routing API capabilities and setup.
! 333: * If more API capabilities are added to the kernel, they should be
! 334: * recorded in `mrt_api_support'.
! 335: */
! 336: static const u_int32_t mrt_api_support = (MRT_MFC_FLAGS_DISABLE_WRONGVIF |
! 337: MRT_MFC_FLAGS_BORDER_VIF |
! 338: MRT_MFC_RP |
! 339: MRT_MFC_BW_UPCALL);
! 340: static u_int32_t mrt_api_config = 0;
! 341:
! 342: /*
! 343: * Find a route for a given origin IP address and Multicast group address
! 344: * Type of service parameter to be added in the future!!!
! 345: * Statistics are updated by the caller if needed
! 346: * (mrtstat.mrts_mfc_lookups and mrtstat.mrts_mfc_misses)
! 347: */
! 348: static struct mfc *
! 349: mfc_find(struct in_addr *o, struct in_addr *g)
! 350: {
! 351: struct mfc *rt;
! 352:
! 353: LIST_FOREACH(rt, &mfchashtbl[MFCHASH(*o, *g)], mfc_hash) {
! 354: if (in_hosteq(rt->mfc_origin, *o) &&
! 355: in_hosteq(rt->mfc_mcastgrp, *g) &&
! 356: (rt->mfc_stall == NULL))
! 357: break;
! 358: }
! 359:
! 360: return (rt);
! 361: }
! 362:
! 363: /*
! 364: * Macros to compute elapsed time efficiently
! 365: * Borrowed from Van Jacobson's scheduling code
! 366: */
! 367: #define TV_DELTA(a, b, delta) do { \
! 368: int xxs; \
! 369: delta = (a).tv_usec - (b).tv_usec; \
! 370: xxs = (a).tv_sec - (b).tv_sec; \
! 371: switch (xxs) { \
! 372: case 2: \
! 373: delta += 1000000; \
! 374: /* FALLTHROUGH */ \
! 375: case 1: \
! 376: delta += 1000000; \
! 377: /* FALLTHROUGH */ \
! 378: case 0: \
! 379: break; \
! 380: default: \
! 381: delta += (1000000 * xxs); \
! 382: break; \
! 383: } \
! 384: } while (/*CONSTCOND*/ 0)
! 385:
! 386: #ifdef UPCALL_TIMING
! 387: u_int32_t upcall_data[51];
! 388: #endif /* UPCALL_TIMING */
! 389:
! 390: /*
! 391: * Handle MRT setsockopt commands to modify the multicast routing tables.
! 392: */
! 393: int
! 394: ip_mrouter_set(struct socket *so, int optname, struct mbuf **m)
! 395: {
! 396: int error;
! 397:
! 398: if (optname != MRT_INIT && so != ip_mrouter)
! 399: error = ENOPROTOOPT;
! 400: else
! 401: switch (optname) {
! 402: case MRT_INIT:
! 403: error = ip_mrouter_init(so, *m);
! 404: break;
! 405: case MRT_DONE:
! 406: error = ip_mrouter_done();
! 407: break;
! 408: case MRT_ADD_VIF:
! 409: error = add_vif(*m);
! 410: break;
! 411: case MRT_DEL_VIF:
! 412: error = del_vif(*m);
! 413: break;
! 414: case MRT_ADD_MFC:
! 415: error = add_mfc(*m);
! 416: break;
! 417: case MRT_DEL_MFC:
! 418: error = del_mfc(*m);
! 419: break;
! 420: case MRT_ASSERT:
! 421: error = set_assert(*m);
! 422: break;
! 423: case MRT_API_CONFIG:
! 424: error = set_api_config(*m);
! 425: break;
! 426: case MRT_ADD_BW_UPCALL:
! 427: error = add_bw_upcall(*m);
! 428: break;
! 429: case MRT_DEL_BW_UPCALL:
! 430: error = del_bw_upcall(*m);
! 431: break;
! 432: default:
! 433: error = ENOPROTOOPT;
! 434: break;
! 435: }
! 436:
! 437: if (*m)
! 438: m_free(*m);
! 439: return (error);
! 440: }
! 441:
! 442: /*
! 443: * Handle MRT getsockopt commands
! 444: */
! 445: int
! 446: ip_mrouter_get(struct socket *so, int optname, struct mbuf **m)
! 447: {
! 448: int error;
! 449:
! 450: if (so != ip_mrouter)
! 451: error = ENOPROTOOPT;
! 452: else {
! 453: *m = m_get(M_WAIT, MT_SOOPTS);
! 454:
! 455: switch (optname) {
! 456: case MRT_VERSION:
! 457: error = get_version(*m);
! 458: break;
! 459: case MRT_ASSERT:
! 460: error = get_assert(*m);
! 461: break;
! 462: case MRT_API_SUPPORT:
! 463: error = get_api_support(*m);
! 464: break;
! 465: case MRT_API_CONFIG:
! 466: error = get_api_config(*m);
! 467: break;
! 468: default:
! 469: error = ENOPROTOOPT;
! 470: break;
! 471: }
! 472:
! 473: if (error)
! 474: m_free(*m);
! 475: }
! 476:
! 477: return (error);
! 478: }
! 479:
! 480: /*
! 481: * Handle ioctl commands to obtain information from the cache
! 482: */
! 483: int
! 484: mrt_ioctl(struct socket *so, u_long cmd, caddr_t data)
! 485: {
! 486: int error;
! 487:
! 488: if (so != ip_mrouter)
! 489: error = EINVAL;
! 490: else
! 491: switch (cmd) {
! 492: case SIOCGETVIFCNT:
! 493: error = get_vif_cnt((struct sioc_vif_req *)data);
! 494: break;
! 495: case SIOCGETSGCNT:
! 496: error = get_sg_cnt((struct sioc_sg_req *)data);
! 497: break;
! 498: default:
! 499: error = EINVAL;
! 500: break;
! 501: }
! 502:
! 503: return (error);
! 504: }
! 505:
! 506: /*
! 507: * returns the packet, byte, rpf-failure count for the source group provided
! 508: */
! 509: static int
! 510: get_sg_cnt(struct sioc_sg_req *req)
! 511: {
! 512: int s;
! 513: struct mfc *rt;
! 514:
! 515: s = splsoftnet();
! 516: rt = mfc_find(&req->src, &req->grp);
! 517: if (rt == NULL) {
! 518: splx(s);
! 519: req->pktcnt = req->bytecnt = req->wrong_if = 0xffffffff;
! 520: return (EADDRNOTAVAIL);
! 521: }
! 522: req->pktcnt = rt->mfc_pkt_cnt;
! 523: req->bytecnt = rt->mfc_byte_cnt;
! 524: req->wrong_if = rt->mfc_wrong_if;
! 525: splx(s);
! 526:
! 527: return (0);
! 528: }
! 529:
! 530: /*
! 531: * returns the input and output packet and byte counts on the vif provided
! 532: */
! 533: static int
! 534: get_vif_cnt(struct sioc_vif_req *req)
! 535: {
! 536: vifi_t vifi = req->vifi;
! 537:
! 538: if (vifi >= numvifs)
! 539: return (EINVAL);
! 540:
! 541: req->icount = viftable[vifi].v_pkt_in;
! 542: req->ocount = viftable[vifi].v_pkt_out;
! 543: req->ibytes = viftable[vifi].v_bytes_in;
! 544: req->obytes = viftable[vifi].v_bytes_out;
! 545:
! 546: return (0);
! 547: }
! 548:
! 549: /*
! 550: * Enable multicast routing
! 551: */
! 552: static int
! 553: ip_mrouter_init(struct socket *so, struct mbuf *m)
! 554: {
! 555: int *v;
! 556:
! 557: if (mrtdebug)
! 558: log(LOG_DEBUG,
! 559: "ip_mrouter_init: so_type = %d, pr_protocol = %d\n",
! 560: so->so_type, so->so_proto->pr_protocol);
! 561:
! 562: if (so->so_type != SOCK_RAW ||
! 563: so->so_proto->pr_protocol != IPPROTO_IGMP)
! 564: return (EOPNOTSUPP);
! 565:
! 566: if (m == NULL || m->m_len < sizeof(int))
! 567: return (EINVAL);
! 568:
! 569: v = mtod(m, int *);
! 570: if (*v != 1)
! 571: return (EINVAL);
! 572:
! 573: if (ip_mrouter != NULL)
! 574: return (EADDRINUSE);
! 575:
! 576: ip_mrouter = so;
! 577:
! 578: mfchashtbl = hashinit(MFCTBLSIZ, M_MRTABLE, M_WAITOK, &mfchash);
! 579: bzero((caddr_t)nexpire, sizeof(nexpire));
! 580:
! 581: pim_assert = 0;
! 582:
! 583: timeout_set(&expire_upcalls_ch, expire_upcalls, NULL);
! 584: timeout_add(&expire_upcalls_ch, EXPIRE_TIMEOUT);
! 585:
! 586: timeout_set(&bw_upcalls_ch, expire_bw_upcalls_send, NULL);
! 587: timeout_add(&bw_upcalls_ch, BW_UPCALLS_PERIOD);
! 588:
! 589: timeout_set(&bw_meter_ch, expire_bw_meter_process, NULL);
! 590: timeout_add(&bw_meter_ch, BW_METER_PERIOD);
! 591:
! 592: if (mrtdebug)
! 593: log(LOG_DEBUG, "ip_mrouter_init\n");
! 594:
! 595: return (0);
! 596: }
! 597:
! 598: /*
! 599: * Disable multicast routing
! 600: */
! 601: int
! 602: ip_mrouter_done()
! 603: {
! 604: vifi_t vifi;
! 605: struct vif *vifp;
! 606: int i;
! 607: int s;
! 608:
! 609: s = splsoftnet();
! 610:
! 611: /* Clear out all the vifs currently in use. */
! 612: for (vifi = 0; vifi < numvifs; vifi++) {
! 613: vifp = &viftable[vifi];
! 614: if (!in_nullhost(vifp->v_lcl_addr))
! 615: reset_vif(vifp);
! 616: }
! 617:
! 618: numvifs = 0;
! 619: pim_assert = 0;
! 620: mrt_api_config = 0;
! 621:
! 622: timeout_del(&expire_upcalls_ch);
! 623: timeout_del(&bw_upcalls_ch);
! 624: timeout_del(&bw_meter_ch);
! 625:
! 626: /*
! 627: * Free all multicast forwarding cache entries.
! 628: */
! 629: for (i = 0; i < MFCTBLSIZ; i++) {
! 630: struct mfc *rt, *nrt;
! 631:
! 632: for (rt = LIST_FIRST(&mfchashtbl[i]); rt; rt = nrt) {
! 633: nrt = LIST_NEXT(rt, mfc_hash);
! 634:
! 635: expire_mfc(rt);
! 636: }
! 637: }
! 638:
! 639: bzero((caddr_t)nexpire, sizeof(nexpire));
! 640: free(mfchashtbl, M_MRTABLE);
! 641: mfchashtbl = NULL;
! 642:
! 643: bw_upcalls_n = 0;
! 644: bzero(bw_meter_timers, sizeof(bw_meter_timers));
! 645:
! 646: /* Reset de-encapsulation cache. */
! 647: have_encap_tunnel = 0;
! 648:
! 649: ip_mrouter = NULL;
! 650:
! 651: splx(s);
! 652:
! 653: if (mrtdebug)
! 654: log(LOG_DEBUG, "ip_mrouter_done\n");
! 655:
! 656: return (0);
! 657: }
! 658:
! 659: void
! 660: ip_mrouter_detach(struct ifnet *ifp)
! 661: {
! 662: int vifi, i;
! 663: struct vif *vifp;
! 664: struct mfc *rt;
! 665: struct rtdetq *rte;
! 666:
! 667: /* XXX not sure about side effect to userland routing daemon */
! 668: for (vifi = 0; vifi < numvifs; vifi++) {
! 669: vifp = &viftable[vifi];
! 670: if (vifp->v_ifp == ifp)
! 671: reset_vif(vifp);
! 672: }
! 673: for (i = 0; i < MFCTBLSIZ; i++) {
! 674: if (nexpire[i] == 0)
! 675: continue;
! 676: LIST_FOREACH(rt, &mfchashtbl[i], mfc_hash) {
! 677: for (rte = rt->mfc_stall; rte; rte = rte->next) {
! 678: if (rte->ifp == ifp)
! 679: rte->ifp = NULL;
! 680: }
! 681: }
! 682: }
! 683: }
! 684:
! 685: static int
! 686: get_version(struct mbuf *m)
! 687: {
! 688: int *v = mtod(m, int *);
! 689:
! 690: *v = 0x0305; /* XXX !!!! */
! 691: m->m_len = sizeof(int);
! 692: return (0);
! 693: }
! 694:
! 695: /*
! 696: * Set PIM assert processing global
! 697: */
! 698: static int
! 699: set_assert(struct mbuf *m)
! 700: {
! 701: int *i;
! 702:
! 703: if (m == NULL || m->m_len < sizeof(int))
! 704: return (EINVAL);
! 705:
! 706: i = mtod(m, int *);
! 707: pim_assert = !!*i;
! 708: return (0);
! 709: }
! 710:
! 711: /*
! 712: * Get PIM assert processing global
! 713: */
! 714: static int
! 715: get_assert(struct mbuf *m)
! 716: {
! 717: int *i = mtod(m, int *);
! 718:
! 719: *i = pim_assert;
! 720: m->m_len = sizeof(int);
! 721: return (0);
! 722: }
! 723:
! 724: /*
! 725: * Configure API capabilities
! 726: */
! 727: static int
! 728: set_api_config(struct mbuf *m)
! 729: {
! 730: int i;
! 731: u_int32_t *apival;
! 732:
! 733: if (m == NULL || m->m_len < sizeof(u_int32_t))
! 734: return (EINVAL);
! 735:
! 736: apival = mtod(m, u_int32_t *);
! 737:
! 738: /*
! 739: * We can set the API capabilities only if it is the first operation
! 740: * after MRT_INIT. I.e.:
! 741: * - there are no vifs installed
! 742: * - pim_assert is not enabled
! 743: * - the MFC table is empty
! 744: */
! 745: if (numvifs > 0) {
! 746: *apival = 0;
! 747: return (EPERM);
! 748: }
! 749: if (pim_assert) {
! 750: *apival = 0;
! 751: return (EPERM);
! 752: }
! 753: for (i = 0; i < MFCTBLSIZ; i++) {
! 754: if (LIST_FIRST(&mfchashtbl[i]) != NULL) {
! 755: *apival = 0;
! 756: return (EPERM);
! 757: }
! 758: }
! 759:
! 760: mrt_api_config = *apival & mrt_api_support;
! 761: *apival = mrt_api_config;
! 762:
! 763: return (0);
! 764: }
! 765:
! 766: /*
! 767: * Get API capabilities
! 768: */
! 769: static int
! 770: get_api_support(struct mbuf *m)
! 771: {
! 772: u_int32_t *apival;
! 773:
! 774: if (m == NULL || m->m_len < sizeof(u_int32_t))
! 775: return (EINVAL);
! 776:
! 777: apival = mtod(m, u_int32_t *);
! 778:
! 779: *apival = mrt_api_support;
! 780:
! 781: return (0);
! 782: }
! 783:
! 784: /*
! 785: * Get API configured capabilities
! 786: */
! 787: static int
! 788: get_api_config(struct mbuf *m)
! 789: {
! 790: u_int32_t *apival;
! 791:
! 792: if (m == NULL || m->m_len < sizeof(u_int32_t))
! 793: return (EINVAL);
! 794:
! 795: apival = mtod(m, u_int32_t *);
! 796:
! 797: *apival = mrt_api_config;
! 798:
! 799: return (0);
! 800: }
! 801:
! 802: static struct sockaddr_in sin = { sizeof(sin), AF_INET };
! 803:
! 804: /*
! 805: * Add a vif to the vif table
! 806: */
! 807: static int
! 808: add_vif(struct mbuf *m)
! 809: {
! 810: struct vifctl *vifcp;
! 811: struct vif *vifp;
! 812: struct ifaddr *ifa;
! 813: struct ifnet *ifp;
! 814: struct ifreq ifr;
! 815: int error, s;
! 816:
! 817: if (m == NULL || m->m_len < sizeof(struct vifctl))
! 818: return (EINVAL);
! 819:
! 820: vifcp = mtod(m, struct vifctl *);
! 821: if (vifcp->vifc_vifi >= MAXVIFS)
! 822: return (EINVAL);
! 823: if (in_nullhost(vifcp->vifc_lcl_addr))
! 824: return (EADDRNOTAVAIL);
! 825:
! 826: vifp = &viftable[vifcp->vifc_vifi];
! 827: if (!in_nullhost(vifp->v_lcl_addr))
! 828: return (EADDRINUSE);
! 829:
! 830: /* Find the interface with an address in AF_INET family. */
! 831: #ifdef PIM
! 832: if (vifcp->vifc_flags & VIFF_REGISTER) {
! 833: /*
! 834: * XXX: Because VIFF_REGISTER does not really need a valid
! 835: * local interface (e.g. it could be 127.0.0.2), we don't
! 836: * check its address.
! 837: */
! 838: ifp = NULL;
! 839: } else
! 840: #endif
! 841: {
! 842: sin.sin_addr = vifcp->vifc_lcl_addr;
! 843: ifa = ifa_ifwithaddr(sintosa(&sin));
! 844: if (ifa == NULL)
! 845: return (EADDRNOTAVAIL);
! 846: ifp = ifa->ifa_ifp;
! 847: }
! 848:
! 849: if (vifcp->vifc_flags & VIFF_TUNNEL) {
! 850: /* tunnels are no longer supported use gif(4) instead */
! 851: return (EOPNOTSUPP);
! 852: #ifdef PIM
! 853: } else if (vifcp->vifc_flags & VIFF_REGISTER) {
! 854: ifp = &multicast_register_if;
! 855: if (mrtdebug)
! 856: log(LOG_DEBUG, "Adding a register vif, ifp: %p\n",
! 857: (void *)ifp);
! 858: if (reg_vif_num == VIFI_INVALID) {
! 859: bzero(ifp, sizeof(*ifp));
! 860: snprintf(ifp->if_xname, sizeof ifp->if_xname,
! 861: "register_vif");
! 862: ifp->if_flags = IFF_LOOPBACK;
! 863: bzero(&vifp->v_route, sizeof(vifp->v_route));
! 864: reg_vif_num = vifcp->vifc_vifi;
! 865: }
! 866: #endif
! 867: } else {
! 868: /* Use the physical interface associated with the address. */
! 869: ifp = ifa->ifa_ifp;
! 870:
! 871: /* Make sure the interface supports multicast. */
! 872: if ((ifp->if_flags & IFF_MULTICAST) == 0)
! 873: return (EOPNOTSUPP);
! 874:
! 875: /* Enable promiscuous reception of all IP multicasts. */
! 876: satosin(&ifr.ifr_addr)->sin_len = sizeof(struct sockaddr_in);
! 877: satosin(&ifr.ifr_addr)->sin_family = AF_INET;
! 878: satosin(&ifr.ifr_addr)->sin_addr = zeroin_addr;
! 879: error = (*ifp->if_ioctl)(ifp, SIOCADDMULTI, (caddr_t)&ifr);
! 880: if (error)
! 881: return (error);
! 882: }
! 883:
! 884: s = splsoftnet();
! 885:
! 886: /* Define parameters for the tbf structure. */
! 887: vifp->tbf_q = NULL;
! 888: vifp->tbf_t = &vifp->tbf_q;
! 889: microtime(&vifp->tbf_last_pkt_t);
! 890: vifp->tbf_n_tok = 0;
! 891: vifp->tbf_q_len = 0;
! 892: vifp->tbf_max_q_len = MAXQSIZE;
! 893:
! 894: vifp->v_flags = vifcp->vifc_flags;
! 895: vifp->v_threshold = vifcp->vifc_threshold;
! 896: /* scaling up here allows division by 1024 in critical code */
! 897: vifp->v_rate_limit = vifcp->vifc_rate_limit * 1024 / 1000;
! 898: vifp->v_lcl_addr = vifcp->vifc_lcl_addr;
! 899: vifp->v_rmt_addr = vifcp->vifc_rmt_addr;
! 900: vifp->v_ifp = ifp;
! 901: /* Initialize per vif pkt counters. */
! 902: vifp->v_pkt_in = 0;
! 903: vifp->v_pkt_out = 0;
! 904: vifp->v_bytes_in = 0;
! 905: vifp->v_bytes_out = 0;
! 906:
! 907: timeout_del(&vifp->v_repq_ch);
! 908:
! 909: #ifdef RSVP_ISI
! 910: vifp->v_rsvp_on = 0;
! 911: vifp->v_rsvpd = NULL;
! 912: #endif /* RSVP_ISI */
! 913:
! 914: splx(s);
! 915:
! 916: /* Adjust numvifs up if the vifi is higher than numvifs. */
! 917: if (numvifs <= vifcp->vifc_vifi)
! 918: numvifs = vifcp->vifc_vifi + 1;
! 919:
! 920: if (mrtdebug)
! 921: log(LOG_DEBUG, "add_vif #%d, lcladdr %x, %s %x, "
! 922: "thresh %x, rate %d\n",
! 923: vifcp->vifc_vifi,
! 924: ntohl(vifcp->vifc_lcl_addr.s_addr),
! 925: (vifcp->vifc_flags & VIFF_TUNNEL) ? "rmtaddr" : "mask",
! 926: ntohl(vifcp->vifc_rmt_addr.s_addr),
! 927: vifcp->vifc_threshold,
! 928: vifcp->vifc_rate_limit);
! 929:
! 930: return (0);
! 931: }
! 932:
! 933: void
! 934: reset_vif(struct vif *vifp)
! 935: {
! 936: struct mbuf *m, *n;
! 937: struct ifnet *ifp;
! 938: struct ifreq ifr;
! 939:
! 940: timeout_set(&vifp->v_repq_ch, tbf_reprocess_q, vifp);
! 941:
! 942: /*
! 943: * Free packets queued at the interface
! 944: */
! 945: for (m = vifp->tbf_q; m != NULL; m = n) {
! 946: n = m->m_nextpkt;
! 947: m_freem(m);
! 948: }
! 949:
! 950: if (vifp->v_flags & VIFF_TUNNEL) {
! 951: /* empty */
! 952: } else if (vifp->v_flags & VIFF_REGISTER) {
! 953: #ifdef PIM
! 954: reg_vif_num = VIFI_INVALID;
! 955: #endif
! 956: } else {
! 957: satosin(&ifr.ifr_addr)->sin_len = sizeof(struct sockaddr_in);
! 958: satosin(&ifr.ifr_addr)->sin_family = AF_INET;
! 959: satosin(&ifr.ifr_addr)->sin_addr = zeroin_addr;
! 960: ifp = vifp->v_ifp;
! 961: (*ifp->if_ioctl)(ifp, SIOCDELMULTI, (caddr_t)&ifr);
! 962: }
! 963: bzero((caddr_t)vifp, sizeof(*vifp));
! 964: }
! 965:
! 966: /*
! 967: * Delete a vif from the vif table
! 968: */
! 969: static int
! 970: del_vif(struct mbuf *m)
! 971: {
! 972: vifi_t *vifip;
! 973: struct vif *vifp;
! 974: vifi_t vifi;
! 975: int s;
! 976:
! 977: if (m == NULL || m->m_len < sizeof(vifi_t))
! 978: return (EINVAL);
! 979:
! 980: vifip = mtod(m, vifi_t *);
! 981: if (*vifip >= numvifs)
! 982: return (EINVAL);
! 983:
! 984: vifp = &viftable[*vifip];
! 985: if (in_nullhost(vifp->v_lcl_addr))
! 986: return (EADDRNOTAVAIL);
! 987:
! 988: s = splsoftnet();
! 989:
! 990: reset_vif(vifp);
! 991:
! 992: /* Adjust numvifs down */
! 993: for (vifi = numvifs; vifi > 0; vifi--)
! 994: if (!in_nullhost(viftable[vifi - 1].v_lcl_addr))
! 995: break;
! 996: numvifs = vifi;
! 997:
! 998: splx(s);
! 999:
! 1000: if (mrtdebug)
! 1001: log(LOG_DEBUG, "del_vif %d, numvifs %d\n", *vifip, numvifs);
! 1002:
! 1003: return (0);
! 1004: }
! 1005:
! 1006: void
! 1007: vif_delete(struct ifnet *ifp)
! 1008: {
! 1009: int i;
! 1010: struct vif *vifp;
! 1011: struct mfc *rt;
! 1012: struct rtdetq *rte;
! 1013:
! 1014: for (i = 0; i < numvifs; i++) {
! 1015: vifp = &viftable[i];
! 1016: if (vifp->v_ifp == ifp)
! 1017: bzero((caddr_t)vifp, sizeof *vifp);
! 1018: }
! 1019:
! 1020: for (i = numvifs; i > 0; i--)
! 1021: if (!in_nullhost(viftable[i - 1].v_lcl_addr))
! 1022: break;
! 1023: numvifs = i;
! 1024:
! 1025: for (i = 0; i < MFCTBLSIZ; i++) {
! 1026: if (nexpire[i] == 0)
! 1027: continue;
! 1028: LIST_FOREACH(rt, &mfchashtbl[i], mfc_hash) {
! 1029: for (rte = rt->mfc_stall; rte; rte = rte->next) {
! 1030: if (rte->ifp == ifp)
! 1031: rte->ifp = NULL;
! 1032: }
! 1033: }
! 1034: }
! 1035: }
! 1036:
! 1037: /*
! 1038: * update an mfc entry without resetting counters and S,G addresses.
! 1039: */
! 1040: static void
! 1041: update_mfc_params(struct mfc *rt, struct mfcctl2 *mfccp)
! 1042: {
! 1043: int i;
! 1044:
! 1045: rt->mfc_parent = mfccp->mfcc_parent;
! 1046: for (i = 0; i < numvifs; i++) {
! 1047: rt->mfc_ttls[i] = mfccp->mfcc_ttls[i];
! 1048: rt->mfc_flags[i] = mfccp->mfcc_flags[i] & mrt_api_config &
! 1049: MRT_MFC_FLAGS_ALL;
! 1050: }
! 1051: /* set the RP address */
! 1052: if (mrt_api_config & MRT_MFC_RP)
! 1053: rt->mfc_rp = mfccp->mfcc_rp;
! 1054: else
! 1055: rt->mfc_rp = zeroin_addr;
! 1056: }
! 1057:
! 1058: /*
! 1059: * fully initialize an mfc entry from the parameter.
! 1060: */
! 1061: static void
! 1062: init_mfc_params(struct mfc *rt, struct mfcctl2 *mfccp)
! 1063: {
! 1064: rt->mfc_origin = mfccp->mfcc_origin;
! 1065: rt->mfc_mcastgrp = mfccp->mfcc_mcastgrp;
! 1066:
! 1067: update_mfc_params(rt, mfccp);
! 1068:
! 1069: /* initialize pkt counters per src-grp */
! 1070: rt->mfc_pkt_cnt = 0;
! 1071: rt->mfc_byte_cnt = 0;
! 1072: rt->mfc_wrong_if = 0;
! 1073: timerclear(&rt->mfc_last_assert);
! 1074: }
! 1075:
! 1076: static void
! 1077: expire_mfc(struct mfc *rt)
! 1078: {
! 1079: struct rtdetq *rte, *nrte;
! 1080:
! 1081: free_bw_list(rt->mfc_bw_meter);
! 1082:
! 1083: for (rte = rt->mfc_stall; rte != NULL; rte = nrte) {
! 1084: nrte = rte->next;
! 1085: m_freem(rte->m);
! 1086: free(rte, M_MRTABLE);
! 1087: }
! 1088:
! 1089: LIST_REMOVE(rt, mfc_hash);
! 1090: free(rt, M_MRTABLE);
! 1091: }
! 1092:
! 1093: /*
! 1094: * Add an mfc entry
! 1095: */
! 1096: static int
! 1097: add_mfc(struct mbuf *m)
! 1098: {
! 1099: struct mfcctl2 mfcctl2;
! 1100: struct mfcctl2 *mfccp;
! 1101: struct mfc *rt;
! 1102: u_int32_t hash = 0;
! 1103: struct rtdetq *rte, *nrte;
! 1104: u_short nstl;
! 1105: int s;
! 1106: int mfcctl_size = sizeof(struct mfcctl);
! 1107:
! 1108: if (mrt_api_config & MRT_API_FLAGS_ALL)
! 1109: mfcctl_size = sizeof(struct mfcctl2);
! 1110:
! 1111: if (m == NULL || m->m_len < mfcctl_size)
! 1112: return (EINVAL);
! 1113:
! 1114: /*
! 1115: * select data size depending on API version.
! 1116: */
! 1117: if (mrt_api_config & MRT_API_FLAGS_ALL) {
! 1118: struct mfcctl2 *mp2 = mtod(m, struct mfcctl2 *);
! 1119: bcopy(mp2, (caddr_t)&mfcctl2, sizeof(*mp2));
! 1120: } else {
! 1121: struct mfcctl *mp = mtod(m, struct mfcctl *);
! 1122: bcopy(mp, (caddr_t)&mfcctl2, sizeof(*mp));
! 1123: bzero((caddr_t)&mfcctl2 + sizeof(struct mfcctl),
! 1124: sizeof(mfcctl2) - sizeof(struct mfcctl));
! 1125: }
! 1126: mfccp = &mfcctl2;
! 1127:
! 1128: s = splsoftnet();
! 1129: rt = mfc_find(&mfccp->mfcc_origin, &mfccp->mfcc_mcastgrp);
! 1130:
! 1131: /* If an entry already exists, just update the fields */
! 1132: if (rt) {
! 1133: if (mrtdebug & DEBUG_MFC)
! 1134: log(LOG_DEBUG, "add_mfc update o %x g %x p %x\n",
! 1135: ntohl(mfccp->mfcc_origin.s_addr),
! 1136: ntohl(mfccp->mfcc_mcastgrp.s_addr),
! 1137: mfccp->mfcc_parent);
! 1138:
! 1139: update_mfc_params(rt, mfccp);
! 1140:
! 1141: splx(s);
! 1142: return (0);
! 1143: }
! 1144:
! 1145: /*
! 1146: * Find the entry for which the upcall was made and update
! 1147: */
! 1148: nstl = 0;
! 1149: hash = MFCHASH(mfccp->mfcc_origin, mfccp->mfcc_mcastgrp);
! 1150: LIST_FOREACH(rt, &mfchashtbl[hash], mfc_hash) {
! 1151: if (in_hosteq(rt->mfc_origin, mfccp->mfcc_origin) &&
! 1152: in_hosteq(rt->mfc_mcastgrp, mfccp->mfcc_mcastgrp) &&
! 1153: rt->mfc_stall != NULL) {
! 1154: if (nstl++)
! 1155: log(LOG_ERR, "add_mfc %s o %x g %x "
! 1156: "p %x dbx %p\n",
! 1157: "multiple kernel entries",
! 1158: ntohl(mfccp->mfcc_origin.s_addr),
! 1159: ntohl(mfccp->mfcc_mcastgrp.s_addr),
! 1160: mfccp->mfcc_parent, rt->mfc_stall);
! 1161:
! 1162: if (mrtdebug & DEBUG_MFC)
! 1163: log(LOG_DEBUG, "add_mfc o %x g %x "
! 1164: "p %x dbg %p\n",
! 1165: ntohl(mfccp->mfcc_origin.s_addr),
! 1166: ntohl(mfccp->mfcc_mcastgrp.s_addr),
! 1167: mfccp->mfcc_parent, rt->mfc_stall);
! 1168:
! 1169: rte = rt->mfc_stall;
! 1170: init_mfc_params(rt, mfccp);
! 1171: rt->mfc_stall = NULL;
! 1172:
! 1173: rt->mfc_expire = 0; /* Don't clean this guy up */
! 1174: nexpire[hash]--;
! 1175:
! 1176: /* free packets Qed at the end of this entry */
! 1177: for (; rte != NULL; rte = nrte) {
! 1178: nrte = rte->next;
! 1179: if (rte->ifp) {
! 1180: #ifdef RSVP_ISI
! 1181: ip_mdq(rte->m, rte->ifp, rt, -1);
! 1182: #else
! 1183: ip_mdq(rte->m, rte->ifp, rt);
! 1184: #endif /* RSVP_ISI */
! 1185: }
! 1186: m_freem(rte->m);
! 1187: #ifdef UPCALL_TIMING
! 1188: collate(&rte->t);
! 1189: #endif /* UPCALL_TIMING */
! 1190: free(rte, M_MRTABLE);
! 1191: }
! 1192: }
! 1193: }
! 1194:
! 1195: /*
! 1196: * It is possible that an entry is being inserted without an upcall
! 1197: */
! 1198: if (nstl == 0) {
! 1199: /*
! 1200: * No mfc; make a new one
! 1201: */
! 1202: if (mrtdebug & DEBUG_MFC)
! 1203: log(LOG_DEBUG, "add_mfc no upcall o %x g %x p %x\n",
! 1204: ntohl(mfccp->mfcc_origin.s_addr),
! 1205: ntohl(mfccp->mfcc_mcastgrp.s_addr),
! 1206: mfccp->mfcc_parent);
! 1207:
! 1208: LIST_FOREACH(rt, &mfchashtbl[hash], mfc_hash) {
! 1209: if (in_hosteq(rt->mfc_origin, mfccp->mfcc_origin) &&
! 1210: in_hosteq(rt->mfc_mcastgrp, mfccp->mfcc_mcastgrp)) {
! 1211: init_mfc_params(rt, mfccp);
! 1212: if (rt->mfc_expire)
! 1213: nexpire[hash]--;
! 1214: rt->mfc_expire = 0;
! 1215: break; /* XXX */
! 1216: }
! 1217: }
! 1218: if (rt == NULL) { /* no upcall, so make a new entry */
! 1219: rt = (struct mfc *)malloc(sizeof(*rt), M_MRTABLE,
! 1220: M_NOWAIT);
! 1221: if (rt == NULL) {
! 1222: splx(s);
! 1223: return (ENOBUFS);
! 1224: }
! 1225:
! 1226: init_mfc_params(rt, mfccp);
! 1227: rt->mfc_expire = 0;
! 1228: rt->mfc_stall = NULL;
! 1229: rt->mfc_bw_meter = NULL;
! 1230:
! 1231: /* insert new entry at head of hash chain */
! 1232: LIST_INSERT_HEAD(&mfchashtbl[hash], rt, mfc_hash);
! 1233: }
! 1234: }
! 1235:
! 1236: splx(s);
! 1237: return (0);
! 1238: }
! 1239:
! 1240: #ifdef UPCALL_TIMING
! 1241: /*
! 1242: * collect delay statistics on the upcalls
! 1243: */
! 1244: static void
! 1245: collate(struct timeval *t)
! 1246: {
! 1247: u_int32_t d;
! 1248: struct timeval tp;
! 1249: u_int32_t delta;
! 1250:
! 1251: microtime(&tp);
! 1252:
! 1253: if (timercmp(t, &tp, <)) {
! 1254: TV_DELTA(tp, *t, delta);
! 1255:
! 1256: d = delta >> 10;
! 1257: if (d > 50)
! 1258: d = 50;
! 1259:
! 1260: ++upcall_data[d];
! 1261: }
! 1262: }
! 1263: #endif /* UPCALL_TIMING */
! 1264:
! 1265: /*
! 1266: * Delete an mfc entry
! 1267: */
! 1268: static int
! 1269: del_mfc(struct mbuf *m)
! 1270: {
! 1271: struct mfcctl2 mfcctl2;
! 1272: struct mfcctl2 *mfccp;
! 1273: struct mfc *rt;
! 1274: int s;
! 1275: int mfcctl_size = sizeof(struct mfcctl);
! 1276: struct mfcctl *mp = mtod(m, struct mfcctl *);
! 1277:
! 1278: /*
! 1279: * XXX: for deleting MFC entries the information in entries
! 1280: * of size "struct mfcctl" is sufficient.
! 1281: */
! 1282:
! 1283: if (m == NULL || m->m_len < mfcctl_size)
! 1284: return (EINVAL);
! 1285:
! 1286: bcopy(mp, (caddr_t)&mfcctl2, sizeof(*mp));
! 1287: bzero((caddr_t)&mfcctl2 + sizeof(struct mfcctl),
! 1288: sizeof(mfcctl2) - sizeof(struct mfcctl));
! 1289:
! 1290: mfccp = &mfcctl2;
! 1291:
! 1292: if (mrtdebug & DEBUG_MFC)
! 1293: log(LOG_DEBUG, "del_mfc origin %x mcastgrp %x\n",
! 1294: ntohl(mfccp->mfcc_origin.s_addr),
! 1295: ntohl(mfccp->mfcc_mcastgrp.s_addr));
! 1296:
! 1297: s = splsoftnet();
! 1298:
! 1299: rt = mfc_find(&mfccp->mfcc_origin, &mfccp->mfcc_mcastgrp);
! 1300: if (rt == NULL) {
! 1301: splx(s);
! 1302: return (EADDRNOTAVAIL);
! 1303: }
! 1304:
! 1305: /*
! 1306: * free the bw_meter entries
! 1307: */
! 1308: free_bw_list(rt->mfc_bw_meter);
! 1309: rt->mfc_bw_meter = NULL;
! 1310:
! 1311: LIST_REMOVE(rt, mfc_hash);
! 1312: free(rt, M_MRTABLE);
! 1313:
! 1314: splx(s);
! 1315: return (0);
! 1316: }
! 1317:
! 1318: static int
! 1319: socket_send(struct socket *s, struct mbuf *mm, struct sockaddr_in *src)
! 1320: {
! 1321: if (s != NULL) {
! 1322: if (sbappendaddr(&s->so_rcv, sintosa(src), mm,
! 1323: (struct mbuf *)NULL) != 0) {
! 1324: sorwakeup(s);
! 1325: return (0);
! 1326: }
! 1327: }
! 1328: m_freem(mm);
! 1329: return (-1);
! 1330: }
! 1331:
! 1332: /*
! 1333: * IP multicast forwarding function. This function assumes that the packet
! 1334: * pointed to by "ip" has arrived on (or is about to be sent to) the interface
! 1335: * pointed to by "ifp", and the packet is to be relayed to other networks
! 1336: * that have members of the packet's destination IP multicast group.
! 1337: *
! 1338: * The packet is returned unscathed to the caller, unless it is
! 1339: * erroneous, in which case a non-zero return value tells the caller to
! 1340: * discard it.
! 1341: */
! 1342:
! 1343: #define IP_HDR_LEN 20 /* # bytes of fixed IP header (excluding options) */
! 1344: #define TUNNEL_LEN 12 /* # bytes of IP option for tunnel encapsulation */
! 1345:
! 1346: int
! 1347: #ifdef RSVP_ISI
! 1348: ip_mforward(struct mbuf *m, struct ifnet *ifp, struct ip_moptions *imo)
! 1349: #else
! 1350: ip_mforward(struct mbuf *m, struct ifnet *ifp)
! 1351: #endif /* RSVP_ISI */
! 1352: {
! 1353: struct ip *ip = mtod(m, struct ip *);
! 1354: struct mfc *rt;
! 1355: static int srctun = 0;
! 1356: struct mbuf *mm;
! 1357: int s;
! 1358: vifi_t vifi;
! 1359:
! 1360: if (mrtdebug & DEBUG_FORWARD)
! 1361: log(LOG_DEBUG, "ip_mforward: src %x, dst %x, ifp %p\n",
! 1362: ntohl(ip->ip_src.s_addr), ntohl(ip->ip_dst.s_addr), ifp);
! 1363:
! 1364: if (ip->ip_hl < (IP_HDR_LEN + TUNNEL_LEN) >> 2 ||
! 1365: ((u_char *)(ip + 1))[1] != IPOPT_LSRR) {
! 1366: /*
! 1367: * Packet arrived via a physical interface or
! 1368: * an encapsulated tunnel or a register_vif.
! 1369: */
! 1370: } else {
! 1371: /*
! 1372: * Packet arrived through a source-route tunnel.
! 1373: * Source-route tunnels are no longer supported.
! 1374: */
! 1375: if ((srctun++ % 1000) == 0)
! 1376: log(LOG_ERR, "ip_mforward: received source-routed "
! 1377: "packet from %x\n", ntohl(ip->ip_src.s_addr));
! 1378:
! 1379: return (1);
! 1380: }
! 1381:
! 1382: #ifdef RSVP_ISI
! 1383: if (imo && ((vifi = imo->imo_multicast_vif) < numvifs)) {
! 1384: if (ip->ip_ttl < 255) {
! 1385: /* compensate for -1 in *_send routines */
! 1386: ip->ip_ttl++;
! 1387: }
! 1388: if (rsvpdebug && ip->ip_p == IPPROTO_RSVP) {
! 1389: struct vif *vifp = viftable + vifi;
! 1390: printf("Sending IPPROTO_RSVP from %x to %x on "
! 1391: "vif %d (%s%s)\n",
! 1392: ntohl(ip->ip_src), ntohl(ip->ip_dst), vifi,
! 1393: (vifp->v_flags & VIFF_TUNNEL) ? "tunnel on " : "",
! 1394: vifp->v_ifp->if_xname);
! 1395: }
! 1396: return (ip_mdq(m, ifp, (struct mfc *)NULL, vifi));
! 1397: }
! 1398: if (rsvpdebug && ip->ip_p == IPPROTO_RSVP) {
! 1399: printf("Warning: IPPROTO_RSVP from %x to %x without "
! 1400: "vif option\n", ntohl(ip->ip_src), ntohl(ip->ip_dst));
! 1401: }
! 1402: #endif /* RSVP_ISI */
! 1403:
! 1404: /*
! 1405: * Don't forward a packet with time-to-live of zero or one,
! 1406: * or a packet destined to a local-only group.
! 1407: */
! 1408: if (ip->ip_ttl <= 1 || IN_LOCAL_GROUP(ip->ip_dst.s_addr))
! 1409: return (0);
! 1410:
! 1411: /*
! 1412: * Determine forwarding vifs from the forwarding cache table
! 1413: */
! 1414: s = splsoftnet();
! 1415: ++mrtstat.mrts_mfc_lookups;
! 1416: rt = mfc_find(&ip->ip_src, &ip->ip_dst);
! 1417:
! 1418: /* Entry exists, so forward if necessary */
! 1419: if (rt != NULL) {
! 1420: splx(s);
! 1421: #ifdef RSVP_ISI
! 1422: return (ip_mdq(m, ifp, rt, -1));
! 1423: #else
! 1424: return (ip_mdq(m, ifp, rt));
! 1425: #endif /* RSVP_ISI */
! 1426: } else {
! 1427: /*
! 1428: * If we don't have a route for packet's origin,
! 1429: * Make a copy of the packet & send message to routing daemon
! 1430: */
! 1431:
! 1432: struct mbuf *mb0;
! 1433: struct rtdetq *rte;
! 1434: u_int32_t hash;
! 1435: int hlen = ip->ip_hl << 2;
! 1436: #ifdef UPCALL_TIMING
! 1437: struct timeval tp;
! 1438:
! 1439: microtime(&tp);
! 1440: #endif /* UPCALL_TIMING */
! 1441:
! 1442: ++mrtstat.mrts_mfc_misses;
! 1443:
! 1444: mrtstat.mrts_no_route++;
! 1445: if (mrtdebug & (DEBUG_FORWARD | DEBUG_MFC))
! 1446: log(LOG_DEBUG, "ip_mforward: no rte s %x g %x\n",
! 1447: ntohl(ip->ip_src.s_addr),
! 1448: ntohl(ip->ip_dst.s_addr));
! 1449:
! 1450: /*
! 1451: * Allocate mbufs early so that we don't do extra work if we are
! 1452: * just going to fail anyway. Make sure to pullup the header so
! 1453: * that other people can't step on it.
! 1454: */
! 1455: rte = (struct rtdetq *)malloc(sizeof(*rte),
! 1456: M_MRTABLE, M_NOWAIT);
! 1457: if (rte == NULL) {
! 1458: splx(s);
! 1459: return (ENOBUFS);
! 1460: }
! 1461: mb0 = m_copy(m, 0, M_COPYALL);
! 1462: M_PULLUP(mb0, hlen);
! 1463: if (mb0 == NULL) {
! 1464: free(rte, M_MRTABLE);
! 1465: splx(s);
! 1466: return (ENOBUFS);
! 1467: }
! 1468:
! 1469: /* is there an upcall waiting for this flow? */
! 1470: hash = MFCHASH(ip->ip_src, ip->ip_dst);
! 1471: LIST_FOREACH(rt, &mfchashtbl[hash], mfc_hash) {
! 1472: if (in_hosteq(ip->ip_src, rt->mfc_origin) &&
! 1473: in_hosteq(ip->ip_dst, rt->mfc_mcastgrp) &&
! 1474: rt->mfc_stall != NULL)
! 1475: break;
! 1476: }
! 1477:
! 1478: if (rt == NULL) {
! 1479: int i;
! 1480: struct igmpmsg *im;
! 1481:
! 1482: /*
! 1483: * Locate the vifi for the incoming interface for
! 1484: * this packet.
! 1485: * If none found, drop packet.
! 1486: */
! 1487: for (vifi = 0; vifi < numvifs &&
! 1488: viftable[vifi].v_ifp != ifp; vifi++)
! 1489: ;
! 1490: if (vifi >= numvifs) /* vif not found, drop packet */
! 1491: goto non_fatal;
! 1492:
! 1493: /* no upcall, so make a new entry */
! 1494: rt = (struct mfc *)malloc(sizeof(*rt),
! 1495: M_MRTABLE, M_NOWAIT);
! 1496: if (rt == NULL)
! 1497: goto fail;
! 1498: /*
! 1499: * Make a copy of the header to send to the user level
! 1500: * process
! 1501: */
! 1502: mm = m_copy(m, 0, hlen);
! 1503: M_PULLUP(mm, hlen);
! 1504: if (mm == NULL)
! 1505: goto fail1;
! 1506:
! 1507: /*
! 1508: * Send message to routing daemon to install
! 1509: * a route into the kernel table
! 1510: */
! 1511:
! 1512: im = mtod(mm, struct igmpmsg *);
! 1513: im->im_msgtype = IGMPMSG_NOCACHE;
! 1514: im->im_mbz = 0;
! 1515: im->im_vif = vifi;
! 1516:
! 1517: mrtstat.mrts_upcalls++;
! 1518:
! 1519: sin.sin_addr = ip->ip_src;
! 1520: if (socket_send(ip_mrouter, mm, &sin) < 0) {
! 1521: log(LOG_WARNING, "ip_mforward: ip_mrouter "
! 1522: "socket queue full\n");
! 1523: ++mrtstat.mrts_upq_sockfull;
! 1524: fail1:
! 1525: free(rt, M_MRTABLE);
! 1526: fail:
! 1527: free(rte, M_MRTABLE);
! 1528: m_freem(mb0);
! 1529: splx(s);
! 1530: return (ENOBUFS);
! 1531: }
! 1532:
! 1533: /* insert new entry at head of hash chain */
! 1534: rt->mfc_origin = ip->ip_src;
! 1535: rt->mfc_mcastgrp = ip->ip_dst;
! 1536: rt->mfc_pkt_cnt = 0;
! 1537: rt->mfc_byte_cnt = 0;
! 1538: rt->mfc_wrong_if = 0;
! 1539: rt->mfc_expire = UPCALL_EXPIRE;
! 1540: nexpire[hash]++;
! 1541: for (i = 0; i < numvifs; i++) {
! 1542: rt->mfc_ttls[i] = 0;
! 1543: rt->mfc_flags[i] = 0;
! 1544: }
! 1545: rt->mfc_parent = -1;
! 1546:
! 1547: /* clear the RP address */
! 1548: rt->mfc_rp = zeroin_addr;
! 1549:
! 1550: rt->mfc_bw_meter = NULL;
! 1551:
! 1552: /* link into table */
! 1553: LIST_INSERT_HEAD(&mfchashtbl[hash], rt, mfc_hash);
! 1554: /* Add this entry to the end of the queue */
! 1555: rt->mfc_stall = rte;
! 1556: } else {
! 1557: /* determine if q has overflowed */
! 1558: struct rtdetq **p;
! 1559: int npkts = 0;
! 1560:
! 1561: /*
! 1562: * XXX ouch! we need to append to the list, but we
! 1563: * only have a pointer to the front, so we have to
! 1564: * scan the entire list every time.
! 1565: */
! 1566: for (p = &rt->mfc_stall; *p != NULL; p = &(*p)->next)
! 1567: if (++npkts > MAX_UPQ) {
! 1568: mrtstat.mrts_upq_ovflw++;
! 1569: non_fatal:
! 1570: free(rte, M_MRTABLE);
! 1571: m_freem(mb0);
! 1572: splx(s);
! 1573: return (0);
! 1574: }
! 1575:
! 1576: /* Add this entry to the end of the queue */
! 1577: *p = rte;
! 1578: }
! 1579:
! 1580: rte->next = NULL;
! 1581: rte->m = mb0;
! 1582: rte->ifp = ifp;
! 1583: #ifdef UPCALL_TIMING
! 1584: rte->t = tp;
! 1585: #endif /* UPCALL_TIMING */
! 1586:
! 1587: splx(s);
! 1588:
! 1589: return (0);
! 1590: }
! 1591: }
! 1592:
! 1593:
! 1594: /*ARGSUSED*/
! 1595: static void
! 1596: expire_upcalls(void *v)
! 1597: {
! 1598: int i;
! 1599: int s;
! 1600:
! 1601: s = splsoftnet();
! 1602:
! 1603: for (i = 0; i < MFCTBLSIZ; i++) {
! 1604: struct mfc *rt, *nrt;
! 1605:
! 1606: if (nexpire[i] == 0)
! 1607: continue;
! 1608:
! 1609: for (rt = LIST_FIRST(&mfchashtbl[i]); rt; rt = nrt) {
! 1610: nrt = LIST_NEXT(rt, mfc_hash);
! 1611:
! 1612: if (rt->mfc_expire == 0 || --rt->mfc_expire > 0)
! 1613: continue;
! 1614: nexpire[i]--;
! 1615:
! 1616: /*
! 1617: * free the bw_meter entries
! 1618: */
! 1619: while (rt->mfc_bw_meter != NULL) {
! 1620: struct bw_meter *x = rt->mfc_bw_meter;
! 1621:
! 1622: rt->mfc_bw_meter = x->bm_mfc_next;
! 1623: free(x, M_BWMETER);
! 1624: }
! 1625:
! 1626: ++mrtstat.mrts_cache_cleanups;
! 1627: if (mrtdebug & DEBUG_EXPIRE)
! 1628: log(LOG_DEBUG,
! 1629: "expire_upcalls: expiring (%x %x)\n",
! 1630: ntohl(rt->mfc_origin.s_addr),
! 1631: ntohl(rt->mfc_mcastgrp.s_addr));
! 1632:
! 1633: expire_mfc(rt);
! 1634: }
! 1635: }
! 1636:
! 1637: splx(s);
! 1638: timeout_add(&expire_upcalls_ch, EXPIRE_TIMEOUT);
! 1639: }
! 1640:
! 1641: /*
! 1642: * Packet forwarding routine once entry in the cache is made
! 1643: */
! 1644: static int
! 1645: #ifdef RSVP_ISI
! 1646: ip_mdq(struct mbuf *m, struct ifnet *ifp, struct mfc *rt, vifi_t xmt_vif)
! 1647: #else
! 1648: ip_mdq(struct mbuf *m, struct ifnet *ifp, struct mfc *rt)
! 1649: #endif /* RSVP_ISI */
! 1650: {
! 1651: struct ip *ip = mtod(m, struct ip *);
! 1652: vifi_t vifi;
! 1653: struct vif *vifp;
! 1654: int plen = ntohs(ip->ip_len) - (ip->ip_hl << 2);
! 1655:
! 1656: /*
! 1657: * Macro to send packet on vif. Since RSVP packets don't get counted on
! 1658: * input, they shouldn't get counted on output, so statistics keeping is
! 1659: * separate.
! 1660: */
! 1661: #define MC_SEND(ip, vifp, m) do { \
! 1662: if ((vifp)->v_flags & VIFF_TUNNEL) \
! 1663: encap_send((ip), (vifp), (m)); \
! 1664: else \
! 1665: phyint_send((ip), (vifp), (m)); \
! 1666: } while (/*CONSTCOND*/ 0)
! 1667:
! 1668: #ifdef RSVP_ISI
! 1669: /*
! 1670: * If xmt_vif is not -1, send on only the requested vif.
! 1671: *
! 1672: * (since vifi_t is u_short, -1 becomes MAXUSHORT, which > numvifs.
! 1673: */
! 1674: if (xmt_vif < numvifs) {
! 1675: #ifdef PIM
! 1676: if (viftable[xmt_vif].v_flags & VIFF_REGISTER)
! 1677: pim_register_send(ip, viftable + xmt_vif, m, rt);
! 1678: else
! 1679: #endif
! 1680: MC_SEND(ip, viftable + xmt_vif, m);
! 1681: return (1);
! 1682: }
! 1683: #endif /* RSVP_ISI */
! 1684:
! 1685: /*
! 1686: * Don't forward if it didn't arrive from the parent vif for its origin.
! 1687: */
! 1688: vifi = rt->mfc_parent;
! 1689: if ((vifi >= numvifs) || (viftable[vifi].v_ifp != ifp)) {
! 1690: /* came in the wrong interface */
! 1691: if (mrtdebug & DEBUG_FORWARD)
! 1692: log(LOG_DEBUG, "wrong if: ifp %p vifi %d vififp %p\n",
! 1693: ifp, vifi,
! 1694: vifi >= numvifs ? 0 : viftable[vifi].v_ifp);
! 1695: ++mrtstat.mrts_wrong_if;
! 1696: ++rt->mfc_wrong_if;
! 1697: /*
! 1698: * If we are doing PIM assert processing, send a message
! 1699: * to the routing daemon.
! 1700: *
! 1701: * XXX: A PIM-SM router needs the WRONGVIF detection so it
! 1702: * can complete the SPT switch, regardless of the type
! 1703: * of interface (broadcast media, GRE tunnel, etc).
! 1704: */
! 1705: if (pim_assert && (vifi < numvifs) && viftable[vifi].v_ifp) {
! 1706: struct timeval now;
! 1707: u_int32_t delta;
! 1708:
! 1709: #ifdef PIM
! 1710: if (ifp == &multicast_register_if)
! 1711: pimstat.pims_rcv_registers_wrongiif++;
! 1712: #endif
! 1713:
! 1714: /* Get vifi for the incoming packet */
! 1715: for (vifi = 0;
! 1716: vifi < numvifs && viftable[vifi].v_ifp != ifp;
! 1717: vifi++)
! 1718: ;
! 1719: if (vifi >= numvifs) {
! 1720: /* The iif is not found: ignore the packet. */
! 1721: return (0);
! 1722: }
! 1723:
! 1724: if (rt->mfc_flags[vifi] &
! 1725: MRT_MFC_FLAGS_DISABLE_WRONGVIF) {
! 1726: /* WRONGVIF disabled: ignore the packet */
! 1727: return (0);
! 1728: }
! 1729:
! 1730: microtime(&now);
! 1731:
! 1732: TV_DELTA(rt->mfc_last_assert, now, delta);
! 1733:
! 1734: if (delta > ASSERT_MSG_TIME) {
! 1735: struct igmpmsg *im;
! 1736: int hlen = ip->ip_hl << 2;
! 1737: struct mbuf *mm = m_copy(m, 0, hlen);
! 1738:
! 1739: M_PULLUP(mm, hlen);
! 1740: if (mm == NULL)
! 1741: return (ENOBUFS);
! 1742:
! 1743: rt->mfc_last_assert = now;
! 1744:
! 1745: im = mtod(mm, struct igmpmsg *);
! 1746: im->im_msgtype = IGMPMSG_WRONGVIF;
! 1747: im->im_mbz = 0;
! 1748: im->im_vif = vifi;
! 1749:
! 1750: mrtstat.mrts_upcalls++;
! 1751:
! 1752: sin.sin_addr = im->im_src;
! 1753: if (socket_send(ip_mrouter, mm, &sin) < 0) {
! 1754: log(LOG_WARNING, "ip_mforward: "
! 1755: "ip_mrouter socket queue full\n");
! 1756: ++mrtstat.mrts_upq_sockfull;
! 1757: return (ENOBUFS);
! 1758: }
! 1759: }
! 1760: }
! 1761: return (0);
! 1762: }
! 1763:
! 1764: /* If I sourced this packet, it counts as output, else it was input. */
! 1765: if (in_hosteq(ip->ip_src, viftable[vifi].v_lcl_addr)) {
! 1766: viftable[vifi].v_pkt_out++;
! 1767: viftable[vifi].v_bytes_out += plen;
! 1768: } else {
! 1769: viftable[vifi].v_pkt_in++;
! 1770: viftable[vifi].v_bytes_in += plen;
! 1771: }
! 1772: rt->mfc_pkt_cnt++;
! 1773: rt->mfc_byte_cnt += plen;
! 1774:
! 1775: /*
! 1776: * For each vif, decide if a copy of the packet should be forwarded.
! 1777: * Forward if:
! 1778: * - the ttl exceeds the vif's threshold
! 1779: * - there are group members downstream on interface
! 1780: */
! 1781: for (vifp = viftable, vifi = 0; vifi < numvifs; vifp++, vifi++)
! 1782: if ((rt->mfc_ttls[vifi] > 0) &&
! 1783: (ip->ip_ttl > rt->mfc_ttls[vifi])) {
! 1784: vifp->v_pkt_out++;
! 1785: vifp->v_bytes_out += plen;
! 1786: #ifdef PIM
! 1787: if (vifp->v_flags & VIFF_REGISTER)
! 1788: pim_register_send(ip, vifp, m, rt);
! 1789: else
! 1790: #endif
! 1791: MC_SEND(ip, vifp, m);
! 1792: }
! 1793:
! 1794: /*
! 1795: * Perform upcall-related bw measuring.
! 1796: */
! 1797: if (rt->mfc_bw_meter != NULL) {
! 1798: struct bw_meter *x;
! 1799: struct timeval now;
! 1800:
! 1801: microtime(&now);
! 1802: for (x = rt->mfc_bw_meter; x != NULL; x = x->bm_mfc_next)
! 1803: bw_meter_receive_packet(x, plen, &now);
! 1804: }
! 1805:
! 1806: return (0);
! 1807: }
! 1808:
! 1809: #ifdef RSVP_ISI
! 1810: /*
! 1811: * check if a vif number is legal/ok. This is used by ip_output.
! 1812: */
! 1813: int
! 1814: legal_vif_num(int vif)
! 1815: {
! 1816: if (vif >= 0 && vif < numvifs)
! 1817: return (1);
! 1818: else
! 1819: return (0);
! 1820: }
! 1821: #endif /* RSVP_ISI */
! 1822:
! 1823: static void
! 1824: phyint_send(struct ip *ip, struct vif *vifp, struct mbuf *m)
! 1825: {
! 1826: struct mbuf *mb_copy;
! 1827: int hlen = ip->ip_hl << 2;
! 1828:
! 1829: /*
! 1830: * Make a new reference to the packet; make sure that
! 1831: * the IP header is actually copied, not just referenced,
! 1832: * so that ip_output() only scribbles on the copy.
! 1833: */
! 1834: mb_copy = m_copy(m, 0, M_COPYALL);
! 1835: M_PULLUP(mb_copy, hlen);
! 1836: if (mb_copy == NULL)
! 1837: return;
! 1838:
! 1839: if (vifp->v_rate_limit <= 0)
! 1840: tbf_send_packet(vifp, mb_copy);
! 1841: else
! 1842: tbf_control(vifp, mb_copy, mtod(mb_copy, struct ip *),
! 1843: ntohs(ip->ip_len));
! 1844: }
! 1845:
! 1846: static void
! 1847: encap_send(struct ip *ip, struct vif *vifp, struct mbuf *m)
! 1848: {
! 1849: struct mbuf *mb_copy;
! 1850: struct ip *ip_copy;
! 1851: int i, len = ntohs(ip->ip_len) + sizeof(multicast_encap_iphdr);
! 1852:
! 1853: /* Take care of delayed checksums */
! 1854: if (m->m_pkthdr.csum_flags & (M_TCPV4_CSUM_OUT | M_UDPV4_CSUM_OUT)) {
! 1855: in_delayed_cksum(m);
! 1856: m->m_pkthdr.csum_flags &=
! 1857: ~(M_UDPV4_CSUM_OUT | M_TCPV4_CSUM_OUT);
! 1858: }
! 1859:
! 1860: /*
! 1861: * copy the old packet & pullup its IP header into the
! 1862: * new mbuf so we can modify it. Try to fill the new
! 1863: * mbuf since if we don't the ethernet driver will.
! 1864: */
! 1865: MGETHDR(mb_copy, M_DONTWAIT, MT_DATA);
! 1866: if (mb_copy == NULL)
! 1867: return;
! 1868: mb_copy->m_data += max_linkhdr;
! 1869: mb_copy->m_pkthdr.len = len;
! 1870: mb_copy->m_len = sizeof(multicast_encap_iphdr);
! 1871:
! 1872: if ((mb_copy->m_next = m_copy(m, 0, M_COPYALL)) == NULL) {
! 1873: m_freem(mb_copy);
! 1874: return;
! 1875: }
! 1876: i = MHLEN - max_linkhdr;
! 1877: if (i > len)
! 1878: i = len;
! 1879: mb_copy = m_pullup(mb_copy, i);
! 1880: if (mb_copy == NULL)
! 1881: return;
! 1882:
! 1883: /*
! 1884: * fill in the encapsulating IP header.
! 1885: */
! 1886: ip_copy = mtod(mb_copy, struct ip *);
! 1887: *ip_copy = multicast_encap_iphdr;
! 1888: ip_copy->ip_id = htons(ip_randomid());
! 1889: ip_copy->ip_len = htons(len);
! 1890: ip_copy->ip_src = vifp->v_lcl_addr;
! 1891: ip_copy->ip_dst = vifp->v_rmt_addr;
! 1892:
! 1893: /*
! 1894: * turn the encapsulated IP header back into a valid one.
! 1895: */
! 1896: ip = (struct ip *)((caddr_t)ip_copy + sizeof(multicast_encap_iphdr));
! 1897: --ip->ip_ttl;
! 1898: ip->ip_sum = 0;
! 1899: mb_copy->m_data += sizeof(multicast_encap_iphdr);
! 1900: ip->ip_sum = in_cksum(mb_copy, ip->ip_hl << 2);
! 1901: mb_copy->m_data -= sizeof(multicast_encap_iphdr);
! 1902:
! 1903: if (vifp->v_rate_limit <= 0)
! 1904: tbf_send_packet(vifp, mb_copy);
! 1905: else
! 1906: tbf_control(vifp, mb_copy, ip, ntohs(ip_copy->ip_len));
! 1907: }
! 1908:
! 1909: /*
! 1910: * Token bucket filter module
! 1911: */
! 1912: static void
! 1913: tbf_control(struct vif *vifp, struct mbuf *m, struct ip *ip, u_int32_t len)
! 1914: {
! 1915:
! 1916: if (len > MAX_BKT_SIZE) {
! 1917: /* drop if packet is too large */
! 1918: mrtstat.mrts_pkt2large++;
! 1919: m_freem(m);
! 1920: return;
! 1921: }
! 1922:
! 1923: tbf_update_tokens(vifp);
! 1924:
! 1925: /*
! 1926: * If there are enough tokens, and the queue is empty, send this packet
! 1927: * out immediately. Otherwise, try to insert it on this vif's queue.
! 1928: */
! 1929: if (vifp->tbf_q_len == 0) {
! 1930: if (len <= vifp->tbf_n_tok) {
! 1931: vifp->tbf_n_tok -= len;
! 1932: tbf_send_packet(vifp, m);
! 1933: } else {
! 1934: /* queue packet and timeout till later */
! 1935: tbf_queue(vifp, m);
! 1936: timeout_add(&vifp->v_repq_ch, TBF_REPROCESS);
! 1937: }
! 1938: } else {
! 1939: if (vifp->tbf_q_len >= vifp->tbf_max_q_len &&
! 1940: !tbf_dq_sel(vifp, ip)) {
! 1941: /* queue full, and couldn't make room */
! 1942: mrtstat.mrts_q_overflow++;
! 1943: m_freem(m);
! 1944: } else {
! 1945: /* queue length low enough, or made room */
! 1946: tbf_queue(vifp, m);
! 1947: tbf_process_q(vifp);
! 1948: }
! 1949: }
! 1950: }
! 1951:
! 1952: /*
! 1953: * adds a packet to the queue at the interface
! 1954: */
! 1955: static void
! 1956: tbf_queue(struct vif *vifp, struct mbuf *m)
! 1957: {
! 1958: int s = splsoftnet();
! 1959:
! 1960: /* insert at tail */
! 1961: *vifp->tbf_t = m;
! 1962: vifp->tbf_t = &m->m_nextpkt;
! 1963: vifp->tbf_q_len++;
! 1964:
! 1965: splx(s);
! 1966: }
! 1967:
! 1968:
! 1969: /*
! 1970: * processes the queue at the interface
! 1971: */
! 1972: static void
! 1973: tbf_process_q(struct vif *vifp)
! 1974: {
! 1975: struct mbuf *m;
! 1976: int len;
! 1977: int s = splsoftnet();
! 1978:
! 1979: /*
! 1980: * Loop through the queue at the interface and send as many packets
! 1981: * as possible.
! 1982: */
! 1983: for (m = vifp->tbf_q; m != NULL; m = vifp->tbf_q) {
! 1984: len = ntohs(mtod(m, struct ip *)->ip_len);
! 1985:
! 1986: /* determine if the packet can be sent */
! 1987: if (len <= vifp->tbf_n_tok) {
! 1988: /* if so,
! 1989: * reduce no of tokens, dequeue the packet,
! 1990: * send the packet.
! 1991: */
! 1992: if ((vifp->tbf_q = m->m_nextpkt) == NULL)
! 1993: vifp->tbf_t = &vifp->tbf_q;
! 1994: --vifp->tbf_q_len;
! 1995:
! 1996: m->m_nextpkt = NULL;
! 1997: vifp->tbf_n_tok -= len;
! 1998: tbf_send_packet(vifp, m);
! 1999: } else
! 2000: break;
! 2001: }
! 2002: splx(s);
! 2003: }
! 2004:
! 2005: static void
! 2006: tbf_reprocess_q(void *arg)
! 2007: {
! 2008: struct vif *vifp = arg;
! 2009:
! 2010: if (ip_mrouter == NULL)
! 2011: return;
! 2012:
! 2013: tbf_update_tokens(vifp);
! 2014: tbf_process_q(vifp);
! 2015:
! 2016: if (vifp->tbf_q_len != 0)
! 2017: timeout_add(&vifp->v_repq_ch, TBF_REPROCESS);
! 2018: }
! 2019:
! 2020: /* function that will selectively discard a member of the queue
! 2021: * based on the precedence value and the priority
! 2022: */
! 2023: static int
! 2024: tbf_dq_sel(struct vif *vifp, struct ip *ip)
! 2025: {
! 2026: u_int p;
! 2027: struct mbuf **mp, *m;
! 2028: int s = splsoftnet();
! 2029:
! 2030: p = priority(vifp, ip);
! 2031:
! 2032: for (mp = &vifp->tbf_q, m = *mp;
! 2033: m != NULL;
! 2034: mp = &m->m_nextpkt, m = *mp) {
! 2035: if (p > priority(vifp, mtod(m, struct ip *))) {
! 2036: if ((*mp = m->m_nextpkt) == NULL)
! 2037: vifp->tbf_t = mp;
! 2038: --vifp->tbf_q_len;
! 2039:
! 2040: m_freem(m);
! 2041: mrtstat.mrts_drop_sel++;
! 2042: splx(s);
! 2043: return (1);
! 2044: }
! 2045: }
! 2046: splx(s);
! 2047: return (0);
! 2048: }
! 2049:
! 2050: static void
! 2051: tbf_send_packet(struct vif *vifp, struct mbuf *m)
! 2052: {
! 2053: int error;
! 2054: int s = splsoftnet();
! 2055:
! 2056: if (vifp->v_flags & VIFF_TUNNEL) {
! 2057: /* If tunnel options */
! 2058: ip_output(m, (struct mbuf *)NULL, &vifp->v_route,
! 2059: IP_FORWARDING, (struct ip_moptions *)NULL,
! 2060: (struct inpcb *)NULL);
! 2061: } else {
! 2062: /*
! 2063: * if physical interface option, extract the options
! 2064: * and then send
! 2065: */
! 2066: struct ip_moptions imo;
! 2067:
! 2068: imo.imo_multicast_ifp = vifp->v_ifp;
! 2069: imo.imo_multicast_ttl = mtod(m, struct ip *)->ip_ttl - 1;
! 2070: imo.imo_multicast_loop = 1;
! 2071: #ifdef RSVP_ISI
! 2072: imo.imo_multicast_vif = -1;
! 2073: #endif
! 2074:
! 2075: error = ip_output(m, (struct mbuf *)NULL, (struct route *)NULL,
! 2076: IP_FORWARDING|IP_MULTICASTOPTS, &imo,
! 2077: (struct inpcb *)NULL);
! 2078:
! 2079: if (mrtdebug & DEBUG_XMIT)
! 2080: log(LOG_DEBUG, "phyint_send on vif %ld err %d\n",
! 2081: (long)(vifp - viftable), error);
! 2082: }
! 2083: splx(s);
! 2084: }
! 2085:
! 2086: /* determine the current time and then
! 2087: * the elapsed time (between the last time and time now)
! 2088: * in milliseconds & update the no. of tokens in the bucket
! 2089: */
! 2090: static void
! 2091: tbf_update_tokens(struct vif *vifp)
! 2092: {
! 2093: struct timeval tp;
! 2094: u_int32_t tm;
! 2095: int s = splsoftnet();
! 2096:
! 2097: microtime(&tp);
! 2098:
! 2099: TV_DELTA(tp, vifp->tbf_last_pkt_t, tm);
! 2100:
! 2101: /*
! 2102: * This formula is actually
! 2103: * "time in seconds" * "bytes/second".
! 2104: *
! 2105: * (tm / 1000000) * (v_rate_limit * 1000 * (1000/1024) / 8)
! 2106: *
! 2107: * The (1000/1024) was introduced in add_vif to optimize
! 2108: * this divide into a shift.
! 2109: */
! 2110: vifp->tbf_n_tok += tm * vifp->v_rate_limit / 8192;
! 2111: vifp->tbf_last_pkt_t = tp;
! 2112:
! 2113: if (vifp->tbf_n_tok > MAX_BKT_SIZE)
! 2114: vifp->tbf_n_tok = MAX_BKT_SIZE;
! 2115:
! 2116: splx(s);
! 2117: }
! 2118:
! 2119: static int
! 2120: priority(struct vif *vifp, struct ip *ip)
! 2121: {
! 2122: int prio = 50; /* the lowest priority -- default case */
! 2123:
! 2124: /* temporary hack; may add general packet classifier some day */
! 2125:
! 2126: /*
! 2127: * The UDP port space is divided up into four priority ranges:
! 2128: * [0, 16384) : unclassified - lowest priority
! 2129: * [16384, 32768) : audio - highest priority
! 2130: * [32768, 49152) : whiteboard - medium priority
! 2131: * [49152, 65536) : video - low priority
! 2132: */
! 2133: if (ip->ip_p == IPPROTO_UDP) {
! 2134: struct udphdr *udp =
! 2135: (struct udphdr *)(((char *)ip) + (ip->ip_hl << 2));
! 2136:
! 2137: switch (ntohs(udp->uh_dport) & 0xc000) {
! 2138: case 0x4000:
! 2139: prio = 70;
! 2140: break;
! 2141: case 0x8000:
! 2142: prio = 60;
! 2143: break;
! 2144: case 0xc000:
! 2145: prio = 55;
! 2146: break;
! 2147: }
! 2148:
! 2149: if (tbfdebug > 1)
! 2150: log(LOG_DEBUG, "port %x prio %d\n",
! 2151: ntohs(udp->uh_dport), prio);
! 2152: }
! 2153:
! 2154: return (prio);
! 2155: }
! 2156:
! 2157: /*
! 2158: * End of token bucket filter modifications
! 2159: */
! 2160: #ifdef RSVP_ISI
! 2161: int
! 2162: ip_rsvp_vif_init(struct socket *so, struct mbuf *m)
! 2163: {
! 2164: int vifi, s;
! 2165:
! 2166: if (rsvpdebug)
! 2167: printf("ip_rsvp_vif_init: so_type = %d, pr_protocol = %d\n",
! 2168: so->so_type, so->so_proto->pr_protocol);
! 2169:
! 2170: if (so->so_type != SOCK_RAW ||
! 2171: so->so_proto->pr_protocol != IPPROTO_RSVP)
! 2172: return (EOPNOTSUPP);
! 2173:
! 2174: /* Check mbuf. */
! 2175: if (m == NULL || m->m_len != sizeof(int)) {
! 2176: return (EINVAL);
! 2177: }
! 2178: vifi = *(mtod(m, int *));
! 2179:
! 2180: if (rsvpdebug)
! 2181: printf("ip_rsvp_vif_init: vif = %d rsvp_on = %d\n",
! 2182: vifi, rsvp_on);
! 2183:
! 2184: s = splsoftnet();
! 2185:
! 2186: /* Check vif. */
! 2187: if (!legal_vif_num(vifi)) {
! 2188: splx(s);
! 2189: return (EADDRNOTAVAIL);
! 2190: }
! 2191:
! 2192: /* Check if socket is available. */
! 2193: if (viftable[vifi].v_rsvpd != NULL) {
! 2194: splx(s);
! 2195: return (EADDRINUSE);
! 2196: }
! 2197:
! 2198: viftable[vifi].v_rsvpd = so;
! 2199: /* This may seem silly, but we need to be sure we don't over-increment
! 2200: * the RSVP counter, in case something slips up.
! 2201: */
! 2202: if (!viftable[vifi].v_rsvp_on) {
! 2203: viftable[vifi].v_rsvp_on = 1;
! 2204: rsvp_on++;
! 2205: }
! 2206:
! 2207: splx(s);
! 2208: return (0);
! 2209: }
! 2210:
! 2211: int
! 2212: ip_rsvp_vif_done(struct socket *so, struct mbuf *m)
! 2213: {
! 2214: int vifi, s;
! 2215:
! 2216: if (rsvpdebug)
! 2217: printf("ip_rsvp_vif_done: so_type = %d, pr_protocol = %d\n",
! 2218: so->so_type, so->so_proto->pr_protocol);
! 2219:
! 2220: if (so->so_type != SOCK_RAW ||
! 2221: so->so_proto->pr_protocol != IPPROTO_RSVP)
! 2222: return (EOPNOTSUPP);
! 2223:
! 2224: /* Check mbuf. */
! 2225: if (m == NULL || m->m_len != sizeof(int)) {
! 2226: return (EINVAL);
! 2227: }
! 2228: vifi = *(mtod(m, int *));
! 2229:
! 2230: s = splsoftnet();
! 2231:
! 2232: /* Check vif. */
! 2233: if (!legal_vif_num(vifi)) {
! 2234: splx(s);
! 2235: return (EADDRNOTAVAIL);
! 2236: }
! 2237:
! 2238: if (rsvpdebug)
! 2239: printf("ip_rsvp_vif_done: v_rsvpd = %x so = %x\n",
! 2240: viftable[vifi].v_rsvpd, so);
! 2241:
! 2242: viftable[vifi].v_rsvpd = NULL;
! 2243: /*
! 2244: * This may seem silly, but we need to be sure we don't over-decrement
! 2245: * the RSVP counter, in case something slips up.
! 2246: */
! 2247: if (viftable[vifi].v_rsvp_on) {
! 2248: viftable[vifi].v_rsvp_on = 0;
! 2249: rsvp_on--;
! 2250: }
! 2251:
! 2252: splx(s);
! 2253: return (0);
! 2254: }
! 2255:
! 2256: void
! 2257: ip_rsvp_force_done(struct socket *so)
! 2258: {
! 2259: int vifi, s;
! 2260:
! 2261: /* Don't bother if it is not the right type of socket. */
! 2262: if (so->so_type != SOCK_RAW ||
! 2263: so->so_proto->pr_protocol != IPPROTO_RSVP)
! 2264: return;
! 2265:
! 2266: s = splsoftnet();
! 2267:
! 2268: /*
! 2269: * The socket may be attached to more than one vif...this
! 2270: * is perfectly legal.
! 2271: */
! 2272: for (vifi = 0; vifi < numvifs; vifi++) {
! 2273: if (viftable[vifi].v_rsvpd == so) {
! 2274: viftable[vifi].v_rsvpd = NULL;
! 2275: /*
! 2276: * This may seem silly, but we need to be sure we don't
! 2277: * over-decrement the RSVP counter, in case something
! 2278: * slips up.
! 2279: */
! 2280: if (viftable[vifi].v_rsvp_on) {
! 2281: viftable[vifi].v_rsvp_on = 0;
! 2282: rsvp_on--;
! 2283: }
! 2284: }
! 2285: }
! 2286:
! 2287: splx(s);
! 2288: return;
! 2289: }
! 2290:
! 2291: void
! 2292: rsvp_input(struct mbuf *m, struct ifnet *ifp)
! 2293: {
! 2294: int vifi, s;
! 2295: struct ip *ip = mtod(m, struct ip *);
! 2296: static struct sockaddr_in rsvp_src = { sizeof(sin), AF_INET };
! 2297:
! 2298: if (rsvpdebug)
! 2299: printf("rsvp_input: rsvp_on %d\n", rsvp_on);
! 2300:
! 2301: /*
! 2302: * Can still get packets with rsvp_on = 0 if there is a local member
! 2303: * of the group to which the RSVP packet is addressed. But in this
! 2304: * case we want to throw the packet away.
! 2305: */
! 2306: if (!rsvp_on) {
! 2307: m_freem(m);
! 2308: return;
! 2309: }
! 2310:
! 2311: /*
! 2312: * If the old-style non-vif-associated socket is set, then use
! 2313: * it and ignore the new ones.
! 2314: */
! 2315: if (ip_rsvpd != NULL) {
! 2316: if (rsvpdebug)
! 2317: printf("rsvp_input: "
! 2318: "Sending packet up old-style socket\n");
! 2319: rip_input(m, 0); /*XXX*/
! 2320: return;
! 2321: }
! 2322:
! 2323: s = splsoftnet();
! 2324:
! 2325: if (rsvpdebug)
! 2326: printf("rsvp_input: check vifs\n");
! 2327:
! 2328: /* Find which vif the packet arrived on. */
! 2329: for (vifi = 0; vifi < numvifs; vifi++) {
! 2330: if (viftable[vifi].v_ifp == ifp)
! 2331: break;
! 2332: }
! 2333:
! 2334: if (vifi == numvifs) {
! 2335: /* Can't find vif packet arrived on. Drop packet. */
! 2336: if (rsvpdebug)
! 2337: printf("rsvp_input: "
! 2338: "Can't find vif for packet...dropping it.\n");
! 2339: m_freem(m);
! 2340: splx(s);
! 2341: return;
! 2342: }
! 2343:
! 2344: if (rsvpdebug)
! 2345: printf("rsvp_input: check socket\n");
! 2346:
! 2347: if (viftable[vifi].v_rsvpd == NULL) {
! 2348: /*
! 2349: * drop packet, since there is no specific socket for this
! 2350: * interface
! 2351: */
! 2352: if (rsvpdebug)
! 2353: printf("rsvp_input: No socket defined for vif %d\n",
! 2354: vifi);
! 2355: m_freem(m);
! 2356: splx(s);
! 2357: return;
! 2358: }
! 2359:
! 2360: rsvp_src.sin_addr = ip->ip_src;
! 2361:
! 2362: if (rsvpdebug && m)
! 2363: printf("rsvp_input: m->m_len = %d, sbspace() = %d\n",
! 2364: m->m_len, sbspace(&viftable[vifi].v_rsvpd->so_rcv));
! 2365:
! 2366: if (socket_send(viftable[vifi].v_rsvpd, m, &rsvp_src) < 0)
! 2367: if (rsvpdebug)
! 2368: printf("rsvp_input: Failed to append to socket\n");
! 2369: else
! 2370: if (rsvpdebug)
! 2371: printf("rsvp_input: send packet up\n");
! 2372:
! 2373: splx(s);
! 2374: }
! 2375: #endif /* RSVP_ISI */
! 2376:
! 2377: /*
! 2378: * Code for bandwidth monitors
! 2379: */
! 2380:
! 2381: /*
! 2382: * Define common interface for timeval-related methods
! 2383: */
! 2384: #define BW_TIMEVALCMP(tvp, uvp, cmp) timercmp((tvp), (uvp), cmp)
! 2385: #define BW_TIMEVALDECR(vvp, uvp) timersub((vvp), (uvp), (vvp))
! 2386: #define BW_TIMEVALADD(vvp, uvp) timeradd((vvp), (uvp), (vvp))
! 2387:
! 2388: static uint32_t
! 2389: compute_bw_meter_flags(struct bw_upcall *req)
! 2390: {
! 2391: uint32_t flags = 0;
! 2392:
! 2393: if (req->bu_flags & BW_UPCALL_UNIT_PACKETS)
! 2394: flags |= BW_METER_UNIT_PACKETS;
! 2395: if (req->bu_flags & BW_UPCALL_UNIT_BYTES)
! 2396: flags |= BW_METER_UNIT_BYTES;
! 2397: if (req->bu_flags & BW_UPCALL_GEQ)
! 2398: flags |= BW_METER_GEQ;
! 2399: if (req->bu_flags & BW_UPCALL_LEQ)
! 2400: flags |= BW_METER_LEQ;
! 2401:
! 2402: return (flags);
! 2403: }
! 2404:
! 2405: /*
! 2406: * Add a bw_meter entry
! 2407: */
! 2408: static int
! 2409: add_bw_upcall(struct mbuf *m)
! 2410: {
! 2411: int s;
! 2412: struct mfc *mfc;
! 2413: struct timeval delta = { BW_UPCALL_THRESHOLD_INTERVAL_MIN_SEC,
! 2414: BW_UPCALL_THRESHOLD_INTERVAL_MIN_USEC };
! 2415: struct timeval now;
! 2416: struct bw_meter *x;
! 2417: uint32_t flags;
! 2418: struct bw_upcall *req;
! 2419:
! 2420: if (m == NULL || m->m_len < sizeof(struct bw_upcall))
! 2421: return (EINVAL);
! 2422:
! 2423: req = mtod(m, struct bw_upcall *);
! 2424:
! 2425: if (!(mrt_api_config & MRT_MFC_BW_UPCALL))
! 2426: return (EOPNOTSUPP);
! 2427:
! 2428: /* Test if the flags are valid */
! 2429: if (!(req->bu_flags & (BW_UPCALL_UNIT_PACKETS | BW_UPCALL_UNIT_BYTES)))
! 2430: return (EINVAL);
! 2431: if (!(req->bu_flags & (BW_UPCALL_GEQ | BW_UPCALL_LEQ)))
! 2432: return (EINVAL);
! 2433: if ((req->bu_flags & (BW_UPCALL_GEQ | BW_UPCALL_LEQ))
! 2434: == (BW_UPCALL_GEQ | BW_UPCALL_LEQ))
! 2435: return (EINVAL);
! 2436:
! 2437: /* Test if the threshold time interval is valid */
! 2438: if (BW_TIMEVALCMP(&req->bu_threshold.b_time, &delta, <))
! 2439: return (EINVAL);
! 2440:
! 2441: flags = compute_bw_meter_flags(req);
! 2442:
! 2443: /* Find if we have already same bw_meter entry */
! 2444: s = splsoftnet();
! 2445: mfc = mfc_find(&req->bu_src, &req->bu_dst);
! 2446: if (mfc == NULL) {
! 2447: splx(s);
! 2448: return (EADDRNOTAVAIL);
! 2449: }
! 2450: for (x = mfc->mfc_bw_meter; x != NULL; x = x->bm_mfc_next) {
! 2451: if ((BW_TIMEVALCMP(&x->bm_threshold.b_time,
! 2452: &req->bu_threshold.b_time, ==)) &&
! 2453: (x->bm_threshold.b_packets ==
! 2454: req->bu_threshold.b_packets) &&
! 2455: (x->bm_threshold.b_bytes == req->bu_threshold.b_bytes) &&
! 2456: (x->bm_flags & BW_METER_USER_FLAGS) == flags) {
! 2457: splx(s);
! 2458: return (0); /* XXX Already installed */
! 2459: }
! 2460: }
! 2461:
! 2462: /* Allocate the new bw_meter entry */
! 2463: x = (struct bw_meter *)malloc(sizeof(*x), M_BWMETER, M_NOWAIT);
! 2464: if (x == NULL) {
! 2465: splx(s);
! 2466: return (ENOBUFS);
! 2467: }
! 2468:
! 2469: /* Set the new bw_meter entry */
! 2470: x->bm_threshold.b_time = req->bu_threshold.b_time;
! 2471: microtime(&now);
! 2472: x->bm_start_time = now;
! 2473: x->bm_threshold.b_packets = req->bu_threshold.b_packets;
! 2474: x->bm_threshold.b_bytes = req->bu_threshold.b_bytes;
! 2475: x->bm_measured.b_packets = 0;
! 2476: x->bm_measured.b_bytes = 0;
! 2477: x->bm_flags = flags;
! 2478: x->bm_time_next = NULL;
! 2479: x->bm_time_hash = BW_METER_BUCKETS;
! 2480:
! 2481: /* Add the new bw_meter entry to the front of entries for this MFC */
! 2482: x->bm_mfc = mfc;
! 2483: x->bm_mfc_next = mfc->mfc_bw_meter;
! 2484: mfc->mfc_bw_meter = x;
! 2485: schedule_bw_meter(x, &now);
! 2486: splx(s);
! 2487:
! 2488: return (0);
! 2489: }
! 2490:
! 2491: static void
! 2492: free_bw_list(struct bw_meter *list)
! 2493: {
! 2494: while (list != NULL) {
! 2495: struct bw_meter *x = list;
! 2496:
! 2497: list = list->bm_mfc_next;
! 2498: unschedule_bw_meter(x);
! 2499: free(x, M_BWMETER);
! 2500: }
! 2501: }
! 2502:
! 2503: /*
! 2504: * Delete one or multiple bw_meter entries
! 2505: */
! 2506: static int
! 2507: del_bw_upcall(struct mbuf *m)
! 2508: {
! 2509: int s;
! 2510: struct mfc *mfc;
! 2511: struct bw_meter *x;
! 2512: struct bw_upcall *req;
! 2513:
! 2514: if (m == NULL || m->m_len < sizeof(struct bw_upcall))
! 2515: return (EINVAL);
! 2516:
! 2517: req = mtod(m, struct bw_upcall *);
! 2518:
! 2519: if (!(mrt_api_config & MRT_MFC_BW_UPCALL))
! 2520: return (EOPNOTSUPP);
! 2521:
! 2522: s = splsoftnet();
! 2523: /* Find the corresponding MFC entry */
! 2524: mfc = mfc_find(&req->bu_src, &req->bu_dst);
! 2525: if (mfc == NULL) {
! 2526: splx(s);
! 2527: return (EADDRNOTAVAIL);
! 2528: } else if (req->bu_flags & BW_UPCALL_DELETE_ALL) {
! 2529: /* Delete all bw_meter entries for this mfc */
! 2530: struct bw_meter *list;
! 2531:
! 2532: list = mfc->mfc_bw_meter;
! 2533: mfc->mfc_bw_meter = NULL;
! 2534: free_bw_list(list);
! 2535: splx(s);
! 2536: return (0);
! 2537: } else { /* Delete a single bw_meter entry */
! 2538: struct bw_meter *prev;
! 2539: uint32_t flags = 0;
! 2540:
! 2541: flags = compute_bw_meter_flags(req);
! 2542:
! 2543: /* Find the bw_meter entry to delete */
! 2544: for (prev = NULL, x = mfc->mfc_bw_meter; x != NULL;
! 2545: prev = x, x = x->bm_mfc_next) {
! 2546: if ((BW_TIMEVALCMP(&x->bm_threshold.b_time,
! 2547: &req->bu_threshold.b_time, ==)) &&
! 2548: (x->bm_threshold.b_packets ==
! 2549: req->bu_threshold.b_packets) &&
! 2550: (x->bm_threshold.b_bytes ==
! 2551: req->bu_threshold.b_bytes) &&
! 2552: (x->bm_flags & BW_METER_USER_FLAGS) == flags)
! 2553: break;
! 2554: }
! 2555: if (x != NULL) { /* Delete entry from the list for this MFC */
! 2556: if (prev != NULL) {
! 2557: /* remove from middle */
! 2558: prev->bm_mfc_next = x->bm_mfc_next;
! 2559: } else {
! 2560: /* new head of list */
! 2561: x->bm_mfc->mfc_bw_meter = x->bm_mfc_next;
! 2562: }
! 2563:
! 2564: unschedule_bw_meter(x);
! 2565: splx(s);
! 2566: /* Free the bw_meter entry */
! 2567: free(x, M_BWMETER);
! 2568: return (0);
! 2569: } else {
! 2570: splx(s);
! 2571: return (EINVAL);
! 2572: }
! 2573: }
! 2574: /* NOTREACHED */
! 2575: }
! 2576:
! 2577: /*
! 2578: * Perform bandwidth measurement processing that may result in an upcall
! 2579: */
! 2580: static void
! 2581: bw_meter_receive_packet(struct bw_meter *x, int plen, struct timeval *nowp)
! 2582: {
! 2583: struct timeval delta;
! 2584:
! 2585: delta = *nowp;
! 2586: BW_TIMEVALDECR(&delta, &x->bm_start_time);
! 2587:
! 2588: if (x->bm_flags & BW_METER_GEQ) {
! 2589: /* Processing for ">=" type of bw_meter entry */
! 2590: if (BW_TIMEVALCMP(&delta, &x->bm_threshold.b_time, >)) {
! 2591: /* Reset the bw_meter entry */
! 2592: x->bm_start_time = *nowp;
! 2593: x->bm_measured.b_packets = 0;
! 2594: x->bm_measured.b_bytes = 0;
! 2595: x->bm_flags &= ~BW_METER_UPCALL_DELIVERED;
! 2596: }
! 2597:
! 2598: /* Record that a packet is received */
! 2599: x->bm_measured.b_packets++;
! 2600: x->bm_measured.b_bytes += plen;
! 2601:
! 2602: /* Test if we should deliver an upcall */
! 2603: if (!(x->bm_flags & BW_METER_UPCALL_DELIVERED)) {
! 2604: if (((x->bm_flags & BW_METER_UNIT_PACKETS) &&
! 2605: (x->bm_measured.b_packets >=
! 2606: x->bm_threshold.b_packets)) ||
! 2607: ((x->bm_flags & BW_METER_UNIT_BYTES) &&
! 2608: (x->bm_measured.b_bytes >=
! 2609: x->bm_threshold.b_bytes))) {
! 2610: /* Prepare an upcall for delivery */
! 2611: bw_meter_prepare_upcall(x, nowp);
! 2612: x->bm_flags |= BW_METER_UPCALL_DELIVERED;
! 2613: }
! 2614: }
! 2615: } else if (x->bm_flags & BW_METER_LEQ) {
! 2616: /* Processing for "<=" type of bw_meter entry */
! 2617: if (BW_TIMEVALCMP(&delta, &x->bm_threshold.b_time, >)) {
! 2618: /*
! 2619: * We are behind time with the multicast forwarding
! 2620: * table scanning for "<=" type of bw_meter entries,
! 2621: * so test now if we should deliver an upcall.
! 2622: */
! 2623: if (((x->bm_flags & BW_METER_UNIT_PACKETS) &&
! 2624: (x->bm_measured.b_packets <=
! 2625: x->bm_threshold.b_packets)) ||
! 2626: ((x->bm_flags & BW_METER_UNIT_BYTES) &&
! 2627: (x->bm_measured.b_bytes <=
! 2628: x->bm_threshold.b_bytes))) {
! 2629: /* Prepare an upcall for delivery */
! 2630: bw_meter_prepare_upcall(x, nowp);
! 2631: }
! 2632: /* Reschedule the bw_meter entry */
! 2633: unschedule_bw_meter(x);
! 2634: schedule_bw_meter(x, nowp);
! 2635: }
! 2636:
! 2637: /* Record that a packet is received */
! 2638: x->bm_measured.b_packets++;
! 2639: x->bm_measured.b_bytes += plen;
! 2640:
! 2641: /* Test if we should restart the measuring interval */
! 2642: if ((x->bm_flags & BW_METER_UNIT_PACKETS &&
! 2643: x->bm_measured.b_packets <= x->bm_threshold.b_packets) ||
! 2644: (x->bm_flags & BW_METER_UNIT_BYTES &&
! 2645: x->bm_measured.b_bytes <= x->bm_threshold.b_bytes)) {
! 2646: /* Don't restart the measuring interval */
! 2647: } else {
! 2648: /* Do restart the measuring interval */
! 2649: /*
! 2650: * XXX: note that we don't unschedule and schedule,
! 2651: * because this might be too much overhead per packet.
! 2652: * Instead, when we process all entries for a given
! 2653: * timer hash bin, we check whether it is really a
! 2654: * timeout. If not, we reschedule at that time.
! 2655: */
! 2656: x->bm_start_time = *nowp;
! 2657: x->bm_measured.b_packets = 0;
! 2658: x->bm_measured.b_bytes = 0;
! 2659: x->bm_flags &= ~BW_METER_UPCALL_DELIVERED;
! 2660: }
! 2661: }
! 2662: }
! 2663:
! 2664: /*
! 2665: * Prepare a bandwidth-related upcall
! 2666: */
! 2667: static void
! 2668: bw_meter_prepare_upcall(struct bw_meter *x, struct timeval *nowp)
! 2669: {
! 2670: struct timeval delta;
! 2671: struct bw_upcall *u;
! 2672:
! 2673: /* Compute the measured time interval */
! 2674: delta = *nowp;
! 2675: BW_TIMEVALDECR(&delta, &x->bm_start_time);
! 2676:
! 2677: /* If there are too many pending upcalls, deliver them now */
! 2678: if (bw_upcalls_n >= BW_UPCALLS_MAX)
! 2679: bw_upcalls_send();
! 2680:
! 2681: /* Set the bw_upcall entry */
! 2682: u = &bw_upcalls[bw_upcalls_n++];
! 2683: u->bu_src = x->bm_mfc->mfc_origin;
! 2684: u->bu_dst = x->bm_mfc->mfc_mcastgrp;
! 2685: u->bu_threshold.b_time = x->bm_threshold.b_time;
! 2686: u->bu_threshold.b_packets = x->bm_threshold.b_packets;
! 2687: u->bu_threshold.b_bytes = x->bm_threshold.b_bytes;
! 2688: u->bu_measured.b_time = delta;
! 2689: u->bu_measured.b_packets = x->bm_measured.b_packets;
! 2690: u->bu_measured.b_bytes = x->bm_measured.b_bytes;
! 2691: u->bu_flags = 0;
! 2692: if (x->bm_flags & BW_METER_UNIT_PACKETS)
! 2693: u->bu_flags |= BW_UPCALL_UNIT_PACKETS;
! 2694: if (x->bm_flags & BW_METER_UNIT_BYTES)
! 2695: u->bu_flags |= BW_UPCALL_UNIT_BYTES;
! 2696: if (x->bm_flags & BW_METER_GEQ)
! 2697: u->bu_flags |= BW_UPCALL_GEQ;
! 2698: if (x->bm_flags & BW_METER_LEQ)
! 2699: u->bu_flags |= BW_UPCALL_LEQ;
! 2700: }
! 2701:
! 2702: /*
! 2703: * Send the pending bandwidth-related upcalls
! 2704: */
! 2705: static void
! 2706: bw_upcalls_send(void)
! 2707: {
! 2708: struct mbuf *m;
! 2709: int len = bw_upcalls_n * sizeof(bw_upcalls[0]);
! 2710: struct sockaddr_in k_igmpsrc = { sizeof k_igmpsrc, AF_INET };
! 2711: static struct igmpmsg igmpmsg = {
! 2712: 0, /* unused1 */
! 2713: 0, /* unused2 */
! 2714: IGMPMSG_BW_UPCALL, /* im_msgtype */
! 2715: 0, /* im_mbz */
! 2716: 0, /* im_vif */
! 2717: 0, /* unused3 */
! 2718: { 0 }, /* im_src */
! 2719: { 0 } }; /* im_dst */
! 2720:
! 2721: if (bw_upcalls_n == 0)
! 2722: return; /* No pending upcalls */
! 2723:
! 2724: bw_upcalls_n = 0;
! 2725:
! 2726: /*
! 2727: * Allocate a new mbuf, initialize it with the header and
! 2728: * the payload for the pending calls.
! 2729: */
! 2730: MGETHDR(m, M_DONTWAIT, MT_HEADER);
! 2731: if (m == NULL) {
! 2732: log(LOG_WARNING, "bw_upcalls_send: cannot allocate mbuf\n");
! 2733: return;
! 2734: }
! 2735:
! 2736: m->m_len = m->m_pkthdr.len = 0;
! 2737: m_copyback(m, 0, sizeof(struct igmpmsg), (caddr_t)&igmpmsg);
! 2738: m_copyback(m, sizeof(struct igmpmsg), len, (caddr_t)&bw_upcalls[0]);
! 2739:
! 2740: /*
! 2741: * Send the upcalls
! 2742: * XXX do we need to set the address in k_igmpsrc ?
! 2743: */
! 2744: mrtstat.mrts_upcalls++;
! 2745: if (socket_send(ip_mrouter, m, &k_igmpsrc) < 0) {
! 2746: log(LOG_WARNING,
! 2747: "bw_upcalls_send: ip_mrouter socket queue full\n");
! 2748: ++mrtstat.mrts_upq_sockfull;
! 2749: }
! 2750: }
! 2751:
! 2752: /*
! 2753: * Compute the timeout hash value for the bw_meter entries
! 2754: */
! 2755: #define BW_METER_TIMEHASH(bw_meter, hash) do { \
! 2756: struct timeval next_timeval = (bw_meter)->bm_start_time; \
! 2757: \
! 2758: BW_TIMEVALADD(&next_timeval, &(bw_meter)->bm_threshold.b_time); \
! 2759: (hash) = next_timeval.tv_sec; \
! 2760: if (next_timeval.tv_usec) \
! 2761: (hash)++; /* XXX: make sure we don't timeout early */ \
! 2762: (hash) %= BW_METER_BUCKETS; \
! 2763: } while (/*CONSTCOND*/ 0)
! 2764:
! 2765: /*
! 2766: * Schedule a timer to process periodically bw_meter entry of type "<="
! 2767: * by linking the entry in the proper hash bucket.
! 2768: */
! 2769: static void
! 2770: schedule_bw_meter(struct bw_meter *x, struct timeval *nowp)
! 2771: {
! 2772: int time_hash;
! 2773:
! 2774: if (!(x->bm_flags & BW_METER_LEQ))
! 2775: return; /* XXX: we schedule timers only for "<=" entries */
! 2776:
! 2777: /* Reset the bw_meter entry */
! 2778: x->bm_start_time = *nowp;
! 2779: x->bm_measured.b_packets = 0;
! 2780: x->bm_measured.b_bytes = 0;
! 2781: x->bm_flags &= ~BW_METER_UPCALL_DELIVERED;
! 2782:
! 2783: /* Compute the timeout hash value and insert the entry */
! 2784: BW_METER_TIMEHASH(x, time_hash);
! 2785: x->bm_time_next = bw_meter_timers[time_hash];
! 2786: bw_meter_timers[time_hash] = x;
! 2787: x->bm_time_hash = time_hash;
! 2788: }
! 2789:
! 2790: /*
! 2791: * Unschedule the periodic timer that processes bw_meter entry of type "<="
! 2792: * by removing the entry from the proper hash bucket.
! 2793: */
! 2794: static void
! 2795: unschedule_bw_meter(struct bw_meter *x)
! 2796: {
! 2797: int time_hash;
! 2798: struct bw_meter *prev, *tmp;
! 2799:
! 2800: if (!(x->bm_flags & BW_METER_LEQ))
! 2801: return; /* XXX: we schedule timers only for "<=" entries */
! 2802:
! 2803: /* Compute the timeout hash value and delete the entry */
! 2804: time_hash = x->bm_time_hash;
! 2805: if (time_hash >= BW_METER_BUCKETS)
! 2806: return; /* Entry was not scheduled */
! 2807:
! 2808: for (prev = NULL, tmp = bw_meter_timers[time_hash];
! 2809: tmp != NULL; prev = tmp, tmp = tmp->bm_time_next)
! 2810: if (tmp == x)
! 2811: break;
! 2812:
! 2813: if (tmp == NULL)
! 2814: panic("unschedule_bw_meter: bw_meter entry not found");
! 2815:
! 2816: if (prev != NULL)
! 2817: prev->bm_time_next = x->bm_time_next;
! 2818: else
! 2819: bw_meter_timers[time_hash] = x->bm_time_next;
! 2820:
! 2821: x->bm_time_next = NULL;
! 2822: x->bm_time_hash = BW_METER_BUCKETS;
! 2823: }
! 2824:
! 2825: /*
! 2826: * Process all "<=" type of bw_meter that should be processed now,
! 2827: * and for each entry prepare an upcall if necessary. Each processed
! 2828: * entry is rescheduled again for the (periodic) processing.
! 2829: *
! 2830: * This is run periodically (once per second normally). On each round,
! 2831: * all the potentially matching entries are in the hash slot that we are
! 2832: * looking at.
! 2833: */
! 2834: static void
! 2835: bw_meter_process()
! 2836: {
! 2837: int s;
! 2838: static uint32_t last_tv_sec; /* last time we processed this */
! 2839:
! 2840: uint32_t loops;
! 2841: int i;
! 2842: struct timeval now, process_endtime;
! 2843:
! 2844: microtime(&now);
! 2845: if (last_tv_sec == now.tv_sec)
! 2846: return; /* nothing to do */
! 2847:
! 2848: loops = now.tv_sec - last_tv_sec;
! 2849: last_tv_sec = now.tv_sec;
! 2850: if (loops > BW_METER_BUCKETS)
! 2851: loops = BW_METER_BUCKETS;
! 2852:
! 2853: s = splsoftnet();
! 2854: /*
! 2855: * Process all bins of bw_meter entries from the one after the last
! 2856: * processed to the current one. On entry, i points to the last bucket
! 2857: * visited, so we need to increment i at the beginning of the loop.
! 2858: */
! 2859: for (i = (now.tv_sec - loops) % BW_METER_BUCKETS; loops > 0; loops--) {
! 2860: struct bw_meter *x, *tmp_list;
! 2861:
! 2862: if (++i >= BW_METER_BUCKETS)
! 2863: i = 0;
! 2864:
! 2865: /* Disconnect the list of bw_meter entries from the bin */
! 2866: tmp_list = bw_meter_timers[i];
! 2867: bw_meter_timers[i] = NULL;
! 2868:
! 2869: /* Process the list of bw_meter entries */
! 2870: while (tmp_list != NULL) {
! 2871: x = tmp_list;
! 2872: tmp_list = tmp_list->bm_time_next;
! 2873:
! 2874: /* Test if the time interval is over */
! 2875: process_endtime = x->bm_start_time;
! 2876: BW_TIMEVALADD(&process_endtime,
! 2877: &x->bm_threshold.b_time);
! 2878: if (BW_TIMEVALCMP(&process_endtime, &now, >)) {
! 2879: /* Not yet: reschedule, but don't reset */
! 2880: int time_hash;
! 2881:
! 2882: BW_METER_TIMEHASH(x, time_hash);
! 2883: if (time_hash == i &&
! 2884: process_endtime.tv_sec == now.tv_sec) {
! 2885: /*
! 2886: * XXX: somehow the bin processing is
! 2887: * a bit ahead of time. Put the entry
! 2888: * in the next bin.
! 2889: */
! 2890: if (++time_hash >= BW_METER_BUCKETS)
! 2891: time_hash = 0;
! 2892: }
! 2893: x->bm_time_next = bw_meter_timers[time_hash];
! 2894: bw_meter_timers[time_hash] = x;
! 2895: x->bm_time_hash = time_hash;
! 2896:
! 2897: continue;
! 2898: }
! 2899:
! 2900: /* Test if we should deliver an upcall */
! 2901: if (((x->bm_flags & BW_METER_UNIT_PACKETS) &&
! 2902: (x->bm_measured.b_packets <=
! 2903: x->bm_threshold.b_packets)) ||
! 2904: ((x->bm_flags & BW_METER_UNIT_BYTES) &&
! 2905: (x->bm_measured.b_bytes <=
! 2906: x->bm_threshold.b_bytes))) {
! 2907: /* Prepare an upcall for delivery */
! 2908: bw_meter_prepare_upcall(x, &now);
! 2909: }
! 2910:
! 2911: /* Reschedule for next processing */
! 2912: schedule_bw_meter(x, &now);
! 2913: }
! 2914: }
! 2915:
! 2916: /* Send all upcalls that are pending delivery */
! 2917: bw_upcalls_send();
! 2918:
! 2919: splx(s);
! 2920: }
! 2921:
! 2922: /*
! 2923: * A periodic function for sending all upcalls that are pending delivery
! 2924: */
! 2925: static void
! 2926: expire_bw_upcalls_send(void *unused)
! 2927: {
! 2928: int s;
! 2929:
! 2930: s = splsoftnet();
! 2931: bw_upcalls_send();
! 2932: splx(s);
! 2933:
! 2934: timeout_add(&bw_upcalls_ch, BW_UPCALLS_PERIOD);
! 2935: }
! 2936:
! 2937: /*
! 2938: * A periodic function for periodic scanning of the multicast forwarding
! 2939: * table for processing all "<=" bw_meter entries.
! 2940: */
! 2941: static void
! 2942: expire_bw_meter_process(void *unused)
! 2943: {
! 2944: if (mrt_api_config & MRT_MFC_BW_UPCALL)
! 2945: bw_meter_process();
! 2946:
! 2947: timeout_add(&bw_meter_ch, BW_METER_PERIOD);
! 2948: }
! 2949:
! 2950: /*
! 2951: * End of bandwidth monitoring code
! 2952: */
! 2953:
! 2954: #ifdef PIM
! 2955: /*
! 2956: * Send the packet up to the user daemon, or eventually do kernel encapsulation
! 2957: */
! 2958: static int
! 2959: pim_register_send(struct ip *ip, struct vif *vifp,
! 2960: struct mbuf *m, struct mfc *rt)
! 2961: {
! 2962: struct mbuf *mb_copy, *mm;
! 2963:
! 2964: if (mrtdebug & DEBUG_PIM)
! 2965: log(LOG_DEBUG, "pim_register_send: ");
! 2966:
! 2967: mb_copy = pim_register_prepare(ip, m);
! 2968: if (mb_copy == NULL)
! 2969: return (ENOBUFS);
! 2970:
! 2971: /*
! 2972: * Send all the fragments. Note that the mbuf for each fragment
! 2973: * is freed by the sending machinery.
! 2974: */
! 2975: for (mm = mb_copy; mm; mm = mb_copy) {
! 2976: mb_copy = mm->m_nextpkt;
! 2977: mm->m_nextpkt = NULL;
! 2978: mm = m_pullup(mm, sizeof(struct ip));
! 2979: if (mm != NULL) {
! 2980: ip = mtod(mm, struct ip *);
! 2981: if ((mrt_api_config & MRT_MFC_RP) &&
! 2982: !in_nullhost(rt->mfc_rp)) {
! 2983: pim_register_send_rp(ip, vifp, mm, rt);
! 2984: } else {
! 2985: pim_register_send_upcall(ip, vifp, mm, rt);
! 2986: }
! 2987: }
! 2988: }
! 2989:
! 2990: return (0);
! 2991: }
! 2992:
! 2993: /*
! 2994: * Return a copy of the data packet that is ready for PIM Register
! 2995: * encapsulation.
! 2996: * XXX: Note that in the returned copy the IP header is a valid one.
! 2997: */
! 2998: static struct mbuf *
! 2999: pim_register_prepare(struct ip *ip, struct mbuf *m)
! 3000: {
! 3001: struct mbuf *mb_copy = NULL;
! 3002: int mtu;
! 3003:
! 3004: /* Take care of delayed checksums */
! 3005: if (m->m_pkthdr.csum_flags & (M_TCPV4_CSUM_OUT | M_UDPV4_CSUM_OUT)) {
! 3006: in_delayed_cksum(m);
! 3007: m->m_pkthdr.csum_flags &=
! 3008: ~(M_UDPV4_CSUM_OUT | M_TCPV4_CSUM_OUT);
! 3009: }
! 3010:
! 3011: /*
! 3012: * Copy the old packet & pullup its IP header into the
! 3013: * new mbuf so we can modify it.
! 3014: */
! 3015: mb_copy = m_copy(m, 0, M_COPYALL);
! 3016: if (mb_copy == NULL)
! 3017: return (NULL);
! 3018: mb_copy = m_pullup(mb_copy, ip->ip_hl << 2);
! 3019: if (mb_copy == NULL)
! 3020: return (NULL);
! 3021:
! 3022: /* take care of the TTL */
! 3023: ip = mtod(mb_copy, struct ip *);
! 3024: --ip->ip_ttl;
! 3025:
! 3026: /* Compute the MTU after the PIM Register encapsulation */
! 3027: mtu = 0xffff - sizeof(pim_encap_iphdr) - sizeof(pim_encap_pimhdr);
! 3028:
! 3029: if (ntohs(ip->ip_len) <= mtu) {
! 3030: /* Turn the IP header into a valid one */
! 3031: ip->ip_sum = 0;
! 3032: ip->ip_sum = in_cksum(mb_copy, ip->ip_hl << 2);
! 3033: } else {
! 3034: /* Fragment the packet */
! 3035: if (ip_fragment(mb_copy, NULL, mtu) != 0) {
! 3036: /* XXX: mb_copy was freed by ip_fragment() */
! 3037: return (NULL);
! 3038: }
! 3039: }
! 3040: return (mb_copy);
! 3041: }
! 3042:
! 3043: /*
! 3044: * Send an upcall with the data packet to the user-level process.
! 3045: */
! 3046: static int
! 3047: pim_register_send_upcall(struct ip *ip, struct vif *vifp,
! 3048: struct mbuf *mb_copy, struct mfc *rt)
! 3049: {
! 3050: struct mbuf *mb_first;
! 3051: int len = ntohs(ip->ip_len);
! 3052: struct igmpmsg *im;
! 3053: struct sockaddr_in k_igmpsrc = { sizeof k_igmpsrc, AF_INET };
! 3054:
! 3055: /* Add a new mbuf with an upcall header */
! 3056: MGETHDR(mb_first, M_DONTWAIT, MT_HEADER);
! 3057: if (mb_first == NULL) {
! 3058: m_freem(mb_copy);
! 3059: return (ENOBUFS);
! 3060: }
! 3061: mb_first->m_data += max_linkhdr;
! 3062: mb_first->m_pkthdr.len = len + sizeof(struct igmpmsg);
! 3063: mb_first->m_len = sizeof(struct igmpmsg);
! 3064: mb_first->m_next = mb_copy;
! 3065:
! 3066: /* Send message to routing daemon */
! 3067: im = mtod(mb_first, struct igmpmsg *);
! 3068: im->im_msgtype = IGMPMSG_WHOLEPKT;
! 3069: im->im_mbz = 0;
! 3070: im->im_vif = vifp - viftable;
! 3071: im->im_src = ip->ip_src;
! 3072: im->im_dst = ip->ip_dst;
! 3073:
! 3074: k_igmpsrc.sin_addr = ip->ip_src;
! 3075:
! 3076: mrtstat.mrts_upcalls++;
! 3077:
! 3078: if (socket_send(ip_mrouter, mb_first, &k_igmpsrc) < 0) {
! 3079: if (mrtdebug & DEBUG_PIM)
! 3080: log(LOG_WARNING, "mcast: pim_register_send_upcall: "
! 3081: "ip_mrouter socket queue full");
! 3082: ++mrtstat.mrts_upq_sockfull;
! 3083: return (ENOBUFS);
! 3084: }
! 3085:
! 3086: /* Keep statistics */
! 3087: pimstat.pims_snd_registers_msgs++;
! 3088: pimstat.pims_snd_registers_bytes += len;
! 3089:
! 3090: return (0);
! 3091: }
! 3092:
! 3093: /*
! 3094: * Encapsulate the data packet in PIM Register message and send it to the RP.
! 3095: */
! 3096: static int
! 3097: pim_register_send_rp(struct ip *ip, struct vif *vifp,
! 3098: struct mbuf *mb_copy, struct mfc *rt)
! 3099: {
! 3100: struct mbuf *mb_first;
! 3101: struct ip *ip_outer;
! 3102: struct pim_encap_pimhdr *pimhdr;
! 3103: int len = ntohs(ip->ip_len);
! 3104: vifi_t vifi = rt->mfc_parent;
! 3105:
! 3106: if ((vifi >= numvifs) || in_nullhost(viftable[vifi].v_lcl_addr)) {
! 3107: m_freem(mb_copy);
! 3108: return (EADDRNOTAVAIL); /* The iif vif is invalid */
! 3109: }
! 3110:
! 3111: /* Add a new mbuf with the encapsulating header */
! 3112: MGETHDR(mb_first, M_DONTWAIT, MT_HEADER);
! 3113: if (mb_first == NULL) {
! 3114: m_freem(mb_copy);
! 3115: return (ENOBUFS);
! 3116: }
! 3117: mb_first->m_data += max_linkhdr;
! 3118: mb_first->m_len = sizeof(pim_encap_iphdr) + sizeof(pim_encap_pimhdr);
! 3119: mb_first->m_next = mb_copy;
! 3120:
! 3121: mb_first->m_pkthdr.len = len + mb_first->m_len;
! 3122:
! 3123: /* Fill in the encapsulating IP and PIM header */
! 3124: ip_outer = mtod(mb_first, struct ip *);
! 3125: *ip_outer = pim_encap_iphdr;
! 3126: ip_outer->ip_id = htons(ip_randomid());
! 3127: ip_outer->ip_len = htons(len + sizeof(pim_encap_iphdr) +
! 3128: sizeof(pim_encap_pimhdr));
! 3129: ip_outer->ip_src = viftable[vifi].v_lcl_addr;
! 3130: ip_outer->ip_dst = rt->mfc_rp;
! 3131: /*
! 3132: * Copy the inner header TOS to the outer header, and take care of the
! 3133: * IP_DF bit.
! 3134: */
! 3135: ip_outer->ip_tos = ip->ip_tos;
! 3136: if (ntohs(ip->ip_off) & IP_DF)
! 3137: ip_outer->ip_off |= htons(IP_DF);
! 3138: pimhdr = (struct pim_encap_pimhdr *)((caddr_t)ip_outer
! 3139: + sizeof(pim_encap_iphdr));
! 3140: *pimhdr = pim_encap_pimhdr;
! 3141: /* If the iif crosses a border, set the Border-bit */
! 3142: if (rt->mfc_flags[vifi] & MRT_MFC_FLAGS_BORDER_VIF & mrt_api_config)
! 3143: pimhdr->flags |= htonl(PIM_BORDER_REGISTER);
! 3144:
! 3145: mb_first->m_data += sizeof(pim_encap_iphdr);
! 3146: pimhdr->pim.pim_cksum = in_cksum(mb_first, sizeof(pim_encap_pimhdr));
! 3147: mb_first->m_data -= sizeof(pim_encap_iphdr);
! 3148:
! 3149: if (vifp->v_rate_limit == 0)
! 3150: tbf_send_packet(vifp, mb_first);
! 3151: else
! 3152: tbf_control(vifp, mb_first, ip, ntohs(ip_outer->ip_len));
! 3153:
! 3154: /* Keep statistics */
! 3155: pimstat.pims_snd_registers_msgs++;
! 3156: pimstat.pims_snd_registers_bytes += len;
! 3157:
! 3158: return (0);
! 3159: }
! 3160:
! 3161: /*
! 3162: * PIM-SMv2 and PIM-DM messages processing.
! 3163: * Receives and verifies the PIM control messages, and passes them
! 3164: * up to the listening socket, using rip_input().
! 3165: * The only message with special processing is the PIM_REGISTER message
! 3166: * (used by PIM-SM): the PIM header is stripped off, and the inner packet
! 3167: * is passed to if_simloop().
! 3168: */
! 3169: void
! 3170: pim_input(struct mbuf *m, ...)
! 3171: {
! 3172: struct ip *ip = mtod(m, struct ip *);
! 3173: struct pim *pim;
! 3174: int minlen;
! 3175: int datalen;
! 3176: int ip_tos;
! 3177: int iphlen;
! 3178: va_list ap;
! 3179:
! 3180: va_start(ap, m);
! 3181: iphlen = va_arg(ap, int);
! 3182: va_end(ap);
! 3183:
! 3184: datalen = ntohs(ip->ip_len) - iphlen;
! 3185:
! 3186: /* Keep statistics */
! 3187: pimstat.pims_rcv_total_msgs++;
! 3188: pimstat.pims_rcv_total_bytes += datalen;
! 3189:
! 3190: /* Validate lengths */
! 3191: if (datalen < PIM_MINLEN) {
! 3192: pimstat.pims_rcv_tooshort++;
! 3193: log(LOG_ERR, "pim_input: packet size too small %d from %lx\n",
! 3194: datalen, (u_long)ip->ip_src.s_addr);
! 3195: m_freem(m);
! 3196: return;
! 3197: }
! 3198:
! 3199: /*
! 3200: * If the packet is at least as big as a REGISTER, go agead
! 3201: * and grab the PIM REGISTER header size, to avoid another
! 3202: * possible m_pullup() later.
! 3203: *
! 3204: * PIM_MINLEN == pimhdr + u_int32_t == 4 + 4 = 8
! 3205: * PIM_REG_MINLEN == pimhdr + reghdr + encap_iphdr == 4 + 4 + 20 = 28
! 3206: */
! 3207: minlen = iphlen + (datalen >= PIM_REG_MINLEN ?
! 3208: PIM_REG_MINLEN : PIM_MINLEN);
! 3209: /*
! 3210: * Get the IP and PIM headers in contiguous memory, and
! 3211: * possibly the PIM REGISTER header.
! 3212: */
! 3213: if ((m->m_flags & M_EXT || m->m_len < minlen) &&
! 3214: (m = m_pullup(m, minlen)) == NULL) {
! 3215: log(LOG_ERR, "pim_input: m_pullup failure\n");
! 3216: return;
! 3217: }
! 3218: /* m_pullup() may have given us a new mbuf so reset ip. */
! 3219: ip = mtod(m, struct ip *);
! 3220: ip_tos = ip->ip_tos;
! 3221:
! 3222: /* adjust mbuf to point to the PIM header */
! 3223: m->m_data += iphlen;
! 3224: m->m_len -= iphlen;
! 3225: pim = mtod(m, struct pim *);
! 3226:
! 3227: /*
! 3228: * Validate checksum. If PIM REGISTER, exclude the data packet.
! 3229: *
! 3230: * XXX: some older PIMv2 implementations don't make this distinction,
! 3231: * so for compatibility reason perform the checksum over part of the
! 3232: * message, and if error, then over the whole message.
! 3233: */
! 3234: if (PIM_VT_T(pim->pim_vt) == PIM_REGISTER &&
! 3235: in_cksum(m, PIM_MINLEN) == 0) {
! 3236: /* do nothing, checksum okay */
! 3237: } else if (in_cksum(m, datalen)) {
! 3238: pimstat.pims_rcv_badsum++;
! 3239: if (mrtdebug & DEBUG_PIM)
! 3240: log(LOG_DEBUG, "pim_input: invalid checksum");
! 3241: m_freem(m);
! 3242: return;
! 3243: }
! 3244:
! 3245: /* PIM version check */
! 3246: if (PIM_VT_V(pim->pim_vt) < PIM_VERSION) {
! 3247: pimstat.pims_rcv_badversion++;
! 3248: log(LOG_ERR, "pim_input: incorrect version %d, expecting %d\n",
! 3249: PIM_VT_V(pim->pim_vt), PIM_VERSION);
! 3250: m_freem(m);
! 3251: return;
! 3252: }
! 3253:
! 3254: /* restore mbuf back to the outer IP */
! 3255: m->m_data -= iphlen;
! 3256: m->m_len += iphlen;
! 3257:
! 3258: if (PIM_VT_T(pim->pim_vt) == PIM_REGISTER) {
! 3259: /*
! 3260: * Since this is a REGISTER, we'll make a copy of the register
! 3261: * headers ip + pim + u_int32 + encap_ip, to be passed up to the
! 3262: * routing daemon.
! 3263: */
! 3264: int s;
! 3265: struct sockaddr_in dst = { sizeof(dst), AF_INET };
! 3266: struct mbuf *mcp;
! 3267: struct ip *encap_ip;
! 3268: u_int32_t *reghdr;
! 3269: struct ifnet *vifp;
! 3270:
! 3271: s = splsoftnet();
! 3272: if ((reg_vif_num >= numvifs) || (reg_vif_num == VIFI_INVALID)) {
! 3273: splx(s);
! 3274: if (mrtdebug & DEBUG_PIM)
! 3275: log(LOG_DEBUG, "pim_input: register vif "
! 3276: "not set: %d\n", reg_vif_num);
! 3277: m_freem(m);
! 3278: return;
! 3279: }
! 3280: /* XXX need refcnt? */
! 3281: vifp = viftable[reg_vif_num].v_ifp;
! 3282: splx(s);
! 3283:
! 3284: /* Validate length */
! 3285: if (datalen < PIM_REG_MINLEN) {
! 3286: pimstat.pims_rcv_tooshort++;
! 3287: pimstat.pims_rcv_badregisters++;
! 3288: log(LOG_ERR, "pim_input: register packet size "
! 3289: "too small %d from %lx\n",
! 3290: datalen, (u_long)ip->ip_src.s_addr);
! 3291: m_freem(m);
! 3292: return;
! 3293: }
! 3294:
! 3295: reghdr = (u_int32_t *)(pim + 1);
! 3296: encap_ip = (struct ip *)(reghdr + 1);
! 3297:
! 3298: if (mrtdebug & DEBUG_PIM) {
! 3299: log(LOG_DEBUG, "pim_input[register], encap_ip: "
! 3300: "%lx -> %lx, encap_ip len %d\n",
! 3301: (u_long)ntohl(encap_ip->ip_src.s_addr),
! 3302: (u_long)ntohl(encap_ip->ip_dst.s_addr),
! 3303: ntohs(encap_ip->ip_len));
! 3304: }
! 3305:
! 3306: /* verify the version number of the inner packet */
! 3307: if (encap_ip->ip_v != IPVERSION) {
! 3308: pimstat.pims_rcv_badregisters++;
! 3309: if (mrtdebug & DEBUG_PIM) {
! 3310: log(LOG_DEBUG, "pim_input: invalid IP version"
! 3311: " (%d) of the inner packet\n",
! 3312: encap_ip->ip_v);
! 3313: }
! 3314: m_freem(m);
! 3315: return;
! 3316: }
! 3317:
! 3318: /* verify the inner packet is destined to a mcast group */
! 3319: if (!IN_MULTICAST(encap_ip->ip_dst.s_addr)) {
! 3320: pimstat.pims_rcv_badregisters++;
! 3321: if (mrtdebug & DEBUG_PIM)
! 3322: log(LOG_DEBUG,
! 3323: "pim_input: inner packet of register is"
! 3324: " not multicast %lx\n",
! 3325: (u_long)ntohl(encap_ip->ip_dst.s_addr));
! 3326: m_freem(m);
! 3327: return;
! 3328: }
! 3329:
! 3330: /* If a NULL_REGISTER, pass it to the daemon */
! 3331: if ((ntohl(*reghdr) & PIM_NULL_REGISTER))
! 3332: goto pim_input_to_daemon;
! 3333:
! 3334: /*
! 3335: * Copy the TOS from the outer IP header to the inner
! 3336: * IP header.
! 3337: */
! 3338: if (encap_ip->ip_tos != ip_tos) {
! 3339: /* Outer TOS -> inner TOS */
! 3340: encap_ip->ip_tos = ip_tos;
! 3341: /* Recompute the inner header checksum. Sigh... */
! 3342:
! 3343: /* adjust mbuf to point to the inner IP header */
! 3344: m->m_data += (iphlen + PIM_MINLEN);
! 3345: m->m_len -= (iphlen + PIM_MINLEN);
! 3346:
! 3347: encap_ip->ip_sum = 0;
! 3348: encap_ip->ip_sum = in_cksum(m, encap_ip->ip_hl << 2);
! 3349:
! 3350: /* restore mbuf to point back to the outer IP header */
! 3351: m->m_data -= (iphlen + PIM_MINLEN);
! 3352: m->m_len += (iphlen + PIM_MINLEN);
! 3353: }
! 3354:
! 3355: /*
! 3356: * Decapsulate the inner IP packet and loopback to forward it
! 3357: * as a normal multicast packet. Also, make a copy of the
! 3358: * outer_iphdr + pimhdr + reghdr + encap_iphdr
! 3359: * to pass to the daemon later, so it can take the appropriate
! 3360: * actions (e.g., send back PIM_REGISTER_STOP).
! 3361: * XXX: here m->m_data points to the outer IP header.
! 3362: */
! 3363: mcp = m_copy(m, 0, iphlen + PIM_REG_MINLEN);
! 3364: if (mcp == NULL) {
! 3365: log(LOG_ERR, "pim_input: pim register: could not "
! 3366: "copy register head\n");
! 3367: m_freem(m);
! 3368: return;
! 3369: }
! 3370:
! 3371: /* Keep statistics */
! 3372: /* XXX: registers_bytes include only the encap. mcast pkt */
! 3373: pimstat.pims_rcv_registers_msgs++;
! 3374: pimstat.pims_rcv_registers_bytes += ntohs(encap_ip->ip_len);
! 3375:
! 3376: /* forward the inner ip packet; point m_data at the inner ip. */
! 3377: m_adj(m, iphlen + PIM_MINLEN);
! 3378:
! 3379: if (mrtdebug & DEBUG_PIM) {
! 3380: log(LOG_DEBUG,
! 3381: "pim_input: forwarding decapsulated register: "
! 3382: "src %lx, dst %lx, vif %d\n",
! 3383: (u_long)ntohl(encap_ip->ip_src.s_addr),
! 3384: (u_long)ntohl(encap_ip->ip_dst.s_addr),
! 3385: reg_vif_num);
! 3386: }
! 3387: /* NB: vifp was collected above; can it change on us? */
! 3388: looutput(vifp, m, (struct sockaddr *)&dst,
! 3389: (struct rtentry *)NULL);
! 3390:
! 3391: /* prepare the register head to send to the mrouting daemon */
! 3392: m = mcp;
! 3393: }
! 3394:
! 3395: pim_input_to_daemon:
! 3396: /*
! 3397: * Pass the PIM message up to the daemon; if it is a Register message,
! 3398: * pass the 'head' only up to the daemon. This includes the
! 3399: * outer IP header, PIM header, PIM-Register header and the
! 3400: * inner IP header.
! 3401: * XXX: the outer IP header pkt size of a Register is not adjust to
! 3402: * reflect the fact that the inner multicast data is truncated.
! 3403: */
! 3404: rip_input(m);
! 3405:
! 3406: return;
! 3407: }
! 3408: #endif /* PIM */
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