Annotation of embedaddon/pimd/vif.c, revision 1.1
1.1 ! misho 1: /*
! 2: * Copyright (c) 1998-2001
! 3: * University of Southern California/Information Sciences Institute.
! 4: * All rights reserved.
! 5: *
! 6: * Redistribution and use in source and binary forms, with or without
! 7: * modification, are permitted provided that the following conditions
! 8: * are met:
! 9: * 1. Redistributions of source code must retain the above copyright
! 10: * notice, this list of conditions and the following disclaimer.
! 11: * 2. Redistributions in binary form must reproduce the above copyright
! 12: * notice, this list of conditions and the following disclaimer in the
! 13: * documentation and/or other materials provided with the distribution.
! 14: * 3. Neither the name of the project nor the names of its contributors
! 15: * may be used to endorse or promote products derived from this software
! 16: * without specific prior written permission.
! 17: *
! 18: * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
! 19: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 20: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 21: * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
! 22: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 23: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 24: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 25: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 26: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 27: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 28: * SUCH DAMAGE.
! 29: */
! 30: /*
! 31: * Part of this program has been derived from mrouted.
! 32: * The mrouted program is covered by the license in the accompanying file
! 33: * named "LICENSE.mrouted".
! 34: *
! 35: * The mrouted program is COPYRIGHT 1989 by The Board of Trustees of
! 36: * Leland Stanford Junior University.
! 37: *
! 38: */
! 39:
! 40:
! 41: #include "defs.h"
! 42:
! 43: /*
! 44: * Helper macros
! 45: */
! 46: #define is_uv_subnet(src, v) \
! 47: (src & v->uv_subnetmask) == v->uv_subnet && ((v->uv_subnetmask == 0xffffffff) || (src != v->uv_subnetbcast))
! 48:
! 49: #define is_pa_subnet(src, v) \
! 50: (src & p->pa_subnetmask) == p->pa_subnet && ((p->pa_subnetmask == 0xffffffff) || (src != p->pa_subnetbcast))
! 51:
! 52: /*
! 53: * Exported variables.
! 54: */
! 55: struct uvif uvifs[MAXVIFS]; /* array of all virtual interfaces */
! 56: vifi_t numvifs; /* Number of vifs in use */
! 57: int vifs_down; /* 1=>some interfaces are down */
! 58: int phys_vif; /* An enabled vif */
! 59: vifi_t reg_vif_num; /* really virtual interface for registers */
! 60: int udp_socket; /* Since the honkin' kernel doesn't support
! 61: * ioctls on raw IP sockets, we need a UDP
! 62: * socket as well as our IGMP (raw) socket. */
! 63: int total_interfaces; /* Number of all interfaces: including the
! 64: * non-configured, but excluding the
! 65: * loopback interface and the non-multicast
! 66: * capable interfaces.
! 67: */
! 68:
! 69: uint32_t default_route_metric = UCAST_DEFAULT_ROUTE_METRIC;
! 70: uint32_t default_route_distance = UCAST_DEFAULT_ROUTE_DISTANCE;
! 71:
! 72: /*
! 73: * Forward declarations
! 74: */
! 75: static void start_vif (vifi_t vifi);
! 76: static void stop_vif (vifi_t vifi);
! 77: static void start_all_vifs (void);
! 78: static int init_reg_vif (void);
! 79: static int update_reg_vif (vifi_t register_vifi);
! 80:
! 81:
! 82: void init_vifs(void)
! 83: {
! 84: vifi_t vifi;
! 85: struct uvif *v;
! 86: int enabled_vifs;
! 87:
! 88: numvifs = 0;
! 89: reg_vif_num = NO_VIF;
! 90: vifs_down = FALSE;
! 91:
! 92: /* Configure the vifs based on the interface configuration of the the kernel and
! 93: * the contents of the configuration file. (Open a UDP socket for ioctl use in
! 94: * the config procedures if the kernel can't handle IOCTL's on the IGMP socket.) */
! 95: #ifdef IOCTL_OK_ON_RAW_SOCKET
! 96: udp_socket = igmp_socket;
! 97: #else
! 98: if ((udp_socket = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
! 99: logit(LOG_ERR, errno, "UDP socket");
! 100: #endif
! 101:
! 102: /* Clean up all vifs */
! 103: for (vifi = 0, v = uvifs; vifi < MAXVIFS; ++vifi, ++v)
! 104: zero_vif(v, FALSE);
! 105:
! 106: logit(LOG_INFO, 0, "Getting vifs from kernel");
! 107: config_vifs_from_kernel();
! 108: if (disable_all_by_default) {
! 109: logit(LOG_INFO, 0, "Disabling all vifs from kernel");
! 110:
! 111: for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v)
! 112: v->uv_flags |= VIFF_DISABLED;
! 113: }
! 114:
! 115: logit(LOG_INFO, 0, "Getting vifs from %s", config_file);
! 116: config_vifs_from_file();
! 117:
! 118: /*
! 119: * Quit if there are fewer than two enabled vifs.
! 120: */
! 121: enabled_vifs = 0;
! 122: phys_vif = -1;
! 123:
! 124: for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
! 125: /* Initialize the outgoing timeout for each vif. Currently use a fixed time
! 126: * 'PIM_JOIN_PRUNE_HOLDTIME'. Later, may add a configurable array to feed
! 127: * these parameters, or compute them as function of the i/f bandwidth and the
! 128: * overall connectivity...etc. */
! 129: SET_TIMER(v->uv_jp_timer, PIM_JOIN_PRUNE_HOLDTIME);
! 130: if (v->uv_flags & (VIFF_DISABLED | VIFF_DOWN | VIFF_REGISTER | VIFF_TUNNEL))
! 131: continue;
! 132:
! 133: if (phys_vif == -1)
! 134: phys_vif = vifi;
! 135:
! 136: enabled_vifs++;
! 137: }
! 138:
! 139: if (enabled_vifs < 1) /* XXX: TODO: */
! 140: logit(LOG_ERR, 0, "Cannot forward: %s", enabled_vifs == 0 ? "no enabled vifs" : "only one enabled vif");
! 141:
! 142: k_init_pim(igmp_socket); /* Call to kernel to initialize structures */
! 143:
! 144: /* Add a dummy virtual interface to support Registers in the kernel.
! 145: * In order for this to work, the kernel has to have been modified
! 146: * with the PIM patches to ip_mroute.{c,h} and ip.c
! 147: */
! 148: init_reg_vif();
! 149:
! 150: start_all_vifs();
! 151: }
! 152:
! 153: /*
! 154: * Initialize the passed vif with all appropriate default values.
! 155: * "t" is true if a tunnel or register_vif, or false if a phyint.
! 156: */
! 157: void zero_vif(struct uvif *v, int t)
! 158: {
! 159: v->uv_flags = 0; /* Default to IGMPv3 */
! 160: v->uv_metric = DEFAULT_METRIC;
! 161: v->uv_admetric = 0;
! 162: v->uv_threshold = DEFAULT_THRESHOLD;
! 163: v->uv_rate_limit = t ? DEFAULT_REG_RATE_LIMIT : DEFAULT_PHY_RATE_LIMIT;
! 164: v->uv_lcl_addr = INADDR_ANY_N;
! 165: v->uv_rmt_addr = INADDR_ANY_N;
! 166: v->uv_dst_addr = t ? INADDR_ANY_N : allpimrouters_group;
! 167: v->uv_subnet = INADDR_ANY_N;
! 168: v->uv_subnetmask = INADDR_ANY_N;
! 169: v->uv_subnetbcast = INADDR_ANY_N;
! 170: strlcpy(v->uv_name, "", IFNAMSIZ);
! 171: v->uv_groups = (struct listaddr *)NULL;
! 172: v->uv_dvmrp_neighbors = (struct listaddr *)NULL;
! 173: NBRM_CLRALL(v->uv_nbrmap);
! 174: v->uv_querier = (struct listaddr *)NULL;
! 175: v->uv_igmpv1_warn = 0;
! 176: v->uv_prune_lifetime = 0;
! 177: v->uv_acl = (struct vif_acl *)NULL;
! 178: RESET_TIMER(v->uv_leaf_timer);
! 179: v->uv_addrs = (struct phaddr *)NULL;
! 180: v->uv_filter = (struct vif_filter *)NULL;
! 181:
! 182: RESET_TIMER(v->uv_hello_timer);
! 183: v->uv_dr_prio = PIM_HELLO_DR_PRIO_DEFAULT;
! 184: v->uv_genid = 0;
! 185:
! 186: RESET_TIMER(v->uv_gq_timer);
! 187: RESET_TIMER(v->uv_jp_timer);
! 188: v->uv_pim_neighbors = (struct pim_nbr_entry *)NULL;
! 189: v->uv_local_pref = default_route_distance;
! 190: v->uv_local_metric = default_route_metric;
! 191: #ifdef __linux__
! 192: v->uv_ifindex = -1;
! 193: #endif /* __linux__ */
! 194: }
! 195:
! 196:
! 197: /*
! 198: * Add a (the) register vif to the vif table.
! 199: */
! 200: static int init_reg_vif(void)
! 201: {
! 202: struct uvif *v;
! 203: vifi_t i;
! 204:
! 205: v = &uvifs[numvifs];
! 206: v->uv_flags = 0;
! 207:
! 208: if ((numvifs + 1) == MAXVIFS) {
! 209: /* Exit the program! The PIM router must have a Register vif */
! 210: logit(LOG_ERR, 0, "Cannot install the Register vif: too many interfaces");
! 211:
! 212: return FALSE;
! 213: }
! 214:
! 215: /*
! 216: * So far in PIM we need only one register vif and we save its number in
! 217: * the global reg_vif_num.
! 218: */
! 219: reg_vif_num = numvifs;
! 220:
! 221: /* set the REGISTER flag */
! 222: v->uv_flags = VIFF_REGISTER;
! 223: #ifdef PIM_EXPERIMENTAL
! 224: v->uv_flags |= VIFF_REGISTER_KERNEL_ENCAP;
! 225: #endif
! 226: strlcpy(v->uv_name, "register_vif0", sizeof(v->uv_name));
! 227:
! 228: /* Use the address of the first available physical interface to
! 229: * create the register vif.
! 230: */
! 231: for (i = 0; i < numvifs; i++) {
! 232: if (uvifs[i].uv_flags & (VIFF_DOWN | VIFF_DISABLED | VIFF_REGISTER | VIFF_TUNNEL))
! 233: continue;
! 234:
! 235: break;
! 236: }
! 237:
! 238: if (i >= numvifs) {
! 239: logit(LOG_ERR, 0, "No physical interface enabled");
! 240: return -1;
! 241: }
! 242:
! 243: v->uv_lcl_addr = uvifs[i].uv_lcl_addr;
! 244: v->uv_threshold = MINTTL;
! 245:
! 246: numvifs++;
! 247: total_interfaces++;
! 248:
! 249: return 0;
! 250: }
! 251:
! 252:
! 253: static void start_all_vifs(void)
! 254: {
! 255: vifi_t vifi;
! 256: struct uvif *v;
! 257: u_int action;
! 258:
! 259: /* Start first the NON-REGISTER vifs */
! 260: for (action = 0; ; action = VIFF_REGISTER) {
! 261: for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
! 262: /* If starting non-registers but the vif is a register or if starting
! 263: * registers, but the interface is not a register, then just continue. */
! 264: if ((v->uv_flags & VIFF_REGISTER) ^ action)
! 265: continue;
! 266:
! 267: /* Start vif if not DISABLED or DOWN */
! 268: if (v->uv_flags & (VIFF_DISABLED | VIFF_DOWN)) {
! 269: if (v->uv_flags & VIFF_DISABLED)
! 270: logit(LOG_INFO, 0, "Interface %s is DISABLED; vif #%u out of service", v->uv_name, vifi);
! 271: else
! 272: logit(LOG_INFO, 0, "Interface %s is DOWN; vif #%u out of service", v->uv_name, vifi);
! 273: } else {
! 274: start_vif(vifi);
! 275: }
! 276: }
! 277:
! 278: if (action == VIFF_REGISTER)
! 279: break; /* We are done */
! 280: }
! 281: }
! 282:
! 283:
! 284: /*
! 285: * stop all vifs
! 286: */
! 287: void stop_all_vifs(void)
! 288: {
! 289: vifi_t vifi;
! 290: struct uvif *v;
! 291:
! 292: for (vifi = 0; vifi < numvifs; vifi++) {
! 293: v = &uvifs[vifi];
! 294: if (!(v->uv_flags & VIFF_DOWN))
! 295: stop_vif(vifi);
! 296: }
! 297: }
! 298:
! 299:
! 300: /*
! 301: * Initialize the vif and add to the kernel. The vif can be either
! 302: * physical, register or tunnel (tunnels will be used in the future
! 303: * when this code becomes PIM multicast boarder router.
! 304: */
! 305: static void start_vif(vifi_t vifi)
! 306: {
! 307: struct uvif *v;
! 308:
! 309: v = &uvifs[vifi];
! 310: /* Initialy no router on any vif */
! 311: if (v->uv_flags & VIFF_REGISTER)
! 312: v->uv_flags = v->uv_flags & ~VIFF_DOWN;
! 313: else {
! 314: v->uv_flags = (v->uv_flags | VIFF_DR | VIFF_NONBRS) & ~VIFF_DOWN;
! 315:
! 316: /* https://tools.ietf.org/html/draft-ietf-pim-hello-genid-01 */
! 317: v->uv_genid = RANDOM();
! 318:
! 319: SET_TIMER(v->uv_hello_timer, 1 + RANDOM() % pim_timer_hello_interval);
! 320: SET_TIMER(v->uv_jp_timer, 1 + RANDOM() % PIM_JOIN_PRUNE_PERIOD);
! 321: /* TODO: CHECK THE TIMERS!!!!! Set or reset? */
! 322: RESET_TIMER(v->uv_gq_timer);
! 323: v->uv_pim_neighbors = (pim_nbr_entry_t *)NULL;
! 324: }
! 325:
! 326: /* Tell kernel to add, i.e. start this vif */
! 327: k_add_vif(igmp_socket, vifi, &uvifs[vifi]);
! 328: logit(LOG_INFO, 0, "Interface %s comes up; vif #%u now in service", v->uv_name, vifi);
! 329:
! 330: if (!(v->uv_flags & VIFF_REGISTER)) {
! 331: /* Join the PIM multicast group on the interface. */
! 332: k_join(pim_socket, allpimrouters_group, v);
! 333:
! 334: /* Join the ALL-ROUTERS multicast group on the interface. This
! 335: * allows mtrace requests to loop back if they are run on the
! 336: * multicast router. */
! 337: k_join(igmp_socket, allrouters_group, v);
! 338:
! 339: /* Join INADDR_ALLRPTS_GROUP to support IGMPv3 membership reports */
! 340: k_join(igmp_socket, allreports_group, v);
! 341:
! 342: /* Until neighbors are discovered, assume responsibility for sending
! 343: * periodic group membership queries to the subnet. Send the first
! 344: * query. */
! 345: v->uv_flags |= VIFF_QUERIER;
! 346: query_groups(v);
! 347:
! 348: /* Send a probe via the new vif to look for neighbors. */
! 349: send_pim_hello(v, pim_timer_hello_holdtime);
! 350: }
! 351: #ifdef __linux__
! 352: else {
! 353: struct ifreq ifr;
! 354:
! 355: memset(&ifr, 0, sizeof(struct ifreq));
! 356:
! 357: if (mrt_table_id != 0) {
! 358: logit(LOG_INFO, 0, "Initializing pimreg%u", mrt_table_id);
! 359: snprintf(ifr.ifr_name, IFNAMSIZ, "pimreg%u", mrt_table_id);
! 360: } else {
! 361: strlcpy(ifr.ifr_name, "pimreg", IFNAMSIZ);
! 362: }
! 363:
! 364: if (ioctl(udp_socket, SIOGIFINDEX, (char *) &ifr) < 0) {
! 365: logit(LOG_ERR, errno, "ioctl SIOGIFINDEX for %s", ifr.ifr_name);
! 366: /* Not reached */
! 367: return;
! 368: }
! 369:
! 370: v->uv_ifindex = ifr.ifr_ifindex;
! 371: }
! 372: #endif /* __linux__ */
! 373: }
! 374:
! 375:
! 376: /*
! 377: * Stop a vif (either physical interface, tunnel or
! 378: * register.) If we are running only PIM we don't have tunnels.
! 379: */
! 380: static void stop_vif(vifi_t vifi)
! 381: {
! 382: struct uvif *v;
! 383: struct listaddr *a, *b;
! 384: pim_nbr_entry_t *n, *next;
! 385: struct vif_acl *acl;
! 386:
! 387: /*
! 388: * TODO: make sure that the kernel viftable is
! 389: * consistent with the daemon table
! 390: */
! 391: v = &uvifs[vifi];
! 392: if (!(v->uv_flags & VIFF_REGISTER)) {
! 393: k_leave(pim_socket, allpimrouters_group, v);
! 394: k_leave(igmp_socket, allrouters_group, v);
! 395: k_leave(igmp_socket, allreports_group, v);
! 396:
! 397: /* Discard all group addresses. (No need to tell kernel;
! 398: * the k_del_vif() call will clean up kernel state.) */
! 399: while (v->uv_groups) {
! 400: a = v->uv_groups;
! 401: v->uv_groups = a->al_next;
! 402:
! 403: while (a->al_sources) {
! 404: b = a->al_sources;
! 405: a->al_sources = a->al_next;
! 406: free(b);
! 407: }
! 408:
! 409: free(a);
! 410: }
! 411: }
! 412:
! 413: /*
! 414: * TODO: inform (eventually) the neighbors I am going down by sending
! 415: * PIM_HELLO with holdtime=0 so someone else should become a DR.
! 416: */
! 417: /* TODO: dummy! Implement it!! Any problems if don't use it? */
! 418: delete_vif_from_mrt(vifi);
! 419:
! 420: /* Delete the interface from the kernel's vif structure. */
! 421: k_del_vif(igmp_socket, vifi, v);
! 422:
! 423: v->uv_flags = (v->uv_flags & ~VIFF_DR & ~VIFF_QUERIER & ~VIFF_NONBRS) | VIFF_DOWN;
! 424: if (!(v->uv_flags & VIFF_REGISTER)) {
! 425: RESET_TIMER(v->uv_hello_timer);
! 426: RESET_TIMER(v->uv_jp_timer);
! 427: RESET_TIMER(v->uv_gq_timer);
! 428:
! 429: for (n = v->uv_pim_neighbors; n; n = next) {
! 430: next = n->next; /* Free the space for each neighbour */
! 431: delete_pim_nbr(n);
! 432: }
! 433: v->uv_pim_neighbors = NULL;
! 434: }
! 435:
! 436: /* TODO: currently not used */
! 437: /* The Access Control List (list with the scoped addresses) */
! 438: while (v->uv_acl) {
! 439: acl = v->uv_acl;
! 440: v->uv_acl = acl->acl_next;
! 441: free(acl);
! 442: }
! 443:
! 444: vifs_down = TRUE;
! 445: logit(LOG_INFO, 0, "Interface %s goes down; vif #%u out of service", v->uv_name, vifi);
! 446: }
! 447:
! 448:
! 449: /*
! 450: * Update the register vif in the multicast routing daemon and the
! 451: * kernel because the interface used initially to get its local address
! 452: * is DOWN. register_vifi is the index to the Register vif which needs
! 453: * to be updated. As a result the Register vif has a new uv_lcl_addr and
! 454: * is UP (virtually :))
! 455: */
! 456: static int update_reg_vif(vifi_t register_vifi)
! 457: {
! 458: struct uvif *v;
! 459: vifi_t vifi;
! 460:
! 461: /* Find the first useable vif with solid physical background */
! 462: for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
! 463: if (v->uv_flags & (VIFF_DISABLED | VIFF_DOWN | VIFF_REGISTER | VIFF_TUNNEL))
! 464: continue;
! 465:
! 466: /* Found. Stop the bogus Register vif first */
! 467: stop_vif(register_vifi);
! 468: uvifs[register_vifi].uv_lcl_addr = uvifs[vifi].uv_lcl_addr;
! 469:
! 470: start_vif(register_vifi);
! 471: IF_DEBUG(DEBUG_PIM_REGISTER | DEBUG_IF) {
! 472: logit(LOG_NOTICE, 0, "Interface %s has come up; vif #%u now in service",
! 473: uvifs[register_vifi].uv_name, register_vifi);
! 474: }
! 475:
! 476: return 0;
! 477: }
! 478:
! 479: vifs_down = TRUE;
! 480: logit(LOG_WARNING, 0, "Cannot start Register vif: %s", uvifs[vifi].uv_name);
! 481:
! 482: return -1;
! 483: }
! 484:
! 485:
! 486: /*
! 487: * See if any interfaces have changed from up state to down, or vice versa,
! 488: * including any non-multicast-capable interfaces that are in use as local
! 489: * tunnel end-points. Ignore interfaces that have been administratively
! 490: * disabled.
! 491: */
! 492: void check_vif_state(void)
! 493: {
! 494: vifi_t vifi;
! 495: struct uvif *v;
! 496: struct ifreq ifr;
! 497: static int checking_vifs = 0;
! 498:
! 499: /*
! 500: * XXX: TODO: True only for DVMRP?? Check.
! 501: * If we get an error while checking, (e.g. two interfaces go down
! 502: * at once, and we decide to send a prune out one of the failed ones)
! 503: * then don't go into an infinite loop!
! 504: */
! 505: if (checking_vifs)
! 506: return;
! 507:
! 508: vifs_down = FALSE;
! 509: checking_vifs = 1;
! 510:
! 511: /* TODO: Check all potential interfaces!!! */
! 512: /* Check the physical and tunnels only */
! 513: for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
! 514: if (v->uv_flags & (VIFF_DISABLED | VIFF_REGISTER))
! 515: continue;
! 516:
! 517: /* get the interface flags */
! 518: strlcpy(ifr.ifr_name, v->uv_name, sizeof(ifr.ifr_name));
! 519: if (ioctl(udp_socket, SIOCGIFFLAGS, (char *)&ifr) < 0) {
! 520: if (errno == ENODEV) {
! 521: logit(LOG_NOTICE, 0, "Interface %s has gone; vif #%u taken out of service", v->uv_name, vifi);
! 522: stop_vif(vifi);
! 523: vifs_down = TRUE;
! 524: continue;
! 525: }
! 526:
! 527: logit(LOG_ERR, errno, "check_vif_state: ioctl SIOCGIFFLAGS for %s", ifr.ifr_name);
! 528: }
! 529:
! 530: if (v->uv_flags & VIFF_DOWN) {
! 531: if (ifr.ifr_flags & IFF_UP)
! 532: start_vif(vifi);
! 533: else
! 534: vifs_down = TRUE;
! 535: } else {
! 536: if (!(ifr.ifr_flags & IFF_UP)) {
! 537: logit(LOG_NOTICE, 0, "Interface %s has gone down; vif #%u taken out of service", v->uv_name, vifi);
! 538: stop_vif(vifi);
! 539: vifs_down = TRUE;
! 540: }
! 541: }
! 542: }
! 543:
! 544: /* Check the register(s) vif(s) */
! 545: for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
! 546: vifi_t vifi2;
! 547: struct uvif *v2;
! 548: int found;
! 549:
! 550: if (!(v->uv_flags & VIFF_REGISTER))
! 551: continue;
! 552:
! 553: found = 0;
! 554:
! 555: /* Find a physical vif with the same IP address as the
! 556: * Register vif. */
! 557: for (vifi2 = 0, v2 = uvifs; vifi2 < numvifs; ++vifi2, ++v2) {
! 558: if (v2->uv_flags & (VIFF_DISABLED | VIFF_DOWN | VIFF_REGISTER | VIFF_TUNNEL))
! 559: continue;
! 560:
! 561: if (v->uv_lcl_addr != v2->uv_lcl_addr)
! 562: continue;
! 563:
! 564: found = 1;
! 565: break;
! 566: }
! 567:
! 568: /* The physical interface with the IP address as the Register
! 569: * vif is probably DOWN. Get a replacement. */
! 570: if (!found)
! 571: update_reg_vif(vifi);
! 572: }
! 573:
! 574: checking_vifs = 0;
! 575: }
! 576:
! 577:
! 578: /*
! 579: * If the source is directly connected to us, find the vif number for
! 580: * the corresponding physical interface (Register and tunnels excluded).
! 581: * Local addresses are excluded.
! 582: * Return the vif number or NO_VIF if not found.
! 583: */
! 584: vifi_t find_vif_direct(uint32_t src)
! 585: {
! 586: vifi_t vifi;
! 587: struct uvif *v;
! 588: struct phaddr *p;
! 589:
! 590: for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
! 591: if (v->uv_flags & (VIFF_DISABLED | VIFF_DOWN | VIFF_REGISTER | VIFF_TUNNEL))
! 592: continue;
! 593:
! 594: if (src == v->uv_lcl_addr)
! 595: return NO_VIF; /* src is one of our IP addresses */
! 596:
! 597: if (is_uv_subnet(src, v))
! 598: return vifi;
! 599:
! 600: /* Check the extra subnets for this vif */
! 601: /* TODO: don't think currently pimd can handle extra subnets */
! 602: for (p = v->uv_addrs; p; p = p->pa_next) {
! 603: if (is_pa_subnet(src, v))
! 604: return vifi;
! 605: }
! 606:
! 607: /* POINTOPOINT but not VIFF_TUNNEL interface (e.g., GRE) */
! 608: if ((v->uv_flags & VIFF_POINT_TO_POINT) && (src == v->uv_rmt_addr))
! 609: return vifi;
! 610: }
! 611:
! 612: return NO_VIF;
! 613: }
! 614:
! 615:
! 616: /*
! 617: * Checks if src is local address. If "yes" return the vif index,
! 618: * otherwise return value is NO_VIF.
! 619: */
! 620: vifi_t local_address(uint32_t src)
! 621: {
! 622: vifi_t vifi;
! 623: struct uvif *v;
! 624:
! 625: for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
! 626: /* TODO: XXX: what about VIFF_TUNNEL? */
! 627: if (v->uv_flags & (VIFF_DISABLED | VIFF_DOWN | VIFF_REGISTER))
! 628: continue;
! 629:
! 630: if (src == v->uv_lcl_addr)
! 631: return vifi;
! 632: }
! 633:
! 634: /* Returning NO_VIF means not a local address */
! 635: return NO_VIF;
! 636: }
! 637:
! 638: /*
! 639: * If the source is directly connected, or is local address,
! 640: * find the vif number for the corresponding physical interface
! 641: * (Register and tunnels excluded).
! 642: * Return the vif number or NO_VIF if not found.
! 643: */
! 644: vifi_t find_vif_direct_local(uint32_t src)
! 645: {
! 646: vifi_t vifi;
! 647: struct uvif *v;
! 648: struct phaddr *p;
! 649:
! 650: for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
! 651: /* TODO: XXX: what about VIFF_TUNNEL? */
! 652: if (v->uv_flags & (VIFF_DISABLED | VIFF_DOWN | VIFF_REGISTER | VIFF_TUNNEL))
! 653: continue;
! 654:
! 655: if (src == v->uv_lcl_addr)
! 656: return vifi; /* src is one of our IP addresses */
! 657:
! 658: if (is_uv_subnet(src, v))
! 659: return vifi;
! 660:
! 661: /* Check the extra subnets for this vif */
! 662: /* TODO: don't think currently pimd can handle extra subnets */
! 663: for (p = v->uv_addrs; p; p = p->pa_next) {
! 664: if (is_pa_subnet(src, v))
! 665: return vifi;
! 666: }
! 667:
! 668: /* POINTOPOINT but not VIFF_TUNNEL interface (e.g., GRE) */
! 669: if ((v->uv_flags & VIFF_POINT_TO_POINT) && (src == v->uv_rmt_addr))
! 670: return vifi;
! 671: }
! 672:
! 673: return NO_VIF;
! 674: }
! 675:
! 676: /*
! 677: * Returns the highest address of local vif that is UP and ENABLED.
! 678: * The VIFF_REGISTER interface(s) is/are excluded.
! 679: */
! 680: uint32_t max_local_address(void)
! 681: {
! 682: vifi_t vifi;
! 683: struct uvif *v;
! 684: uint32_t max_address = 0;
! 685:
! 686: for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
! 687: /* Count vif if not DISABLED or DOWN */
! 688: /* TODO: XXX: What about VIFF_TUNNEL? */
! 689: if (v->uv_flags & (VIFF_DISABLED | VIFF_DOWN | VIFF_REGISTER))
! 690: continue;
! 691:
! 692: if (ntohl(v->uv_lcl_addr) > ntohl(max_address))
! 693: max_address = v->uv_lcl_addr;
! 694: }
! 695:
! 696: return max_address;
! 697: }
! 698:
! 699: /**
! 700: * Local Variables:
! 701: * version-control: t
! 702: * indent-tabs-mode: t
! 703: * c-file-style: "ellemtel"
! 704: * c-basic-offset: 4
! 705: * End:
! 706: */
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