paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1 | /* RIP version 1 and 2. |
| 2 | * Copyright (C) 1997, 98, 99 Kunihiro Ishiguro <kunihiro@zebra.org> |
| 3 | * |
| 4 | * This file is part of GNU Zebra. |
| 5 | * |
| 6 | * GNU Zebra is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License as published by the |
| 8 | * Free Software Foundation; either version 2, or (at your option) any |
| 9 | * later version. |
| 10 | * |
| 11 | * GNU Zebra is distributed in the hope that it will be useful, but |
| 12 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with GNU Zebra; see the file COPYING. If not, write to the Free |
| 18 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA |
| 19 | * 02111-1307, USA. |
| 20 | */ |
| 21 | |
| 22 | #include <zebra.h> |
| 23 | |
| 24 | #include "if.h" |
| 25 | #include "command.h" |
| 26 | #include "prefix.h" |
| 27 | #include "table.h" |
| 28 | #include "thread.h" |
| 29 | #include "memory.h" |
| 30 | #include "log.h" |
| 31 | #include "stream.h" |
| 32 | #include "filter.h" |
| 33 | #include "sockunion.h" |
| 34 | #include "routemap.h" |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 35 | #include "if_rmap.h" |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 36 | #include "plist.h" |
| 37 | #include "distribute.h" |
| 38 | #include "md5-gnu.h" |
| 39 | #include "keychain.h" |
paul | edd7c24 | 2003-06-04 13:59:38 +0000 | [diff] [blame] | 40 | #include "privs.h" |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 41 | |
| 42 | #include "ripd/ripd.h" |
| 43 | #include "ripd/rip_debug.h" |
| 44 | |
paul | edd7c24 | 2003-06-04 13:59:38 +0000 | [diff] [blame] | 45 | extern struct zebra_privs_t ripd_privs; |
| 46 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 47 | /* RIP Structure. */ |
| 48 | struct rip *rip = NULL; |
| 49 | |
| 50 | /* RIP neighbor address table. */ |
| 51 | struct route_table *rip_neighbor_table; |
| 52 | |
| 53 | /* RIP route changes. */ |
| 54 | long rip_global_route_changes = 0; |
| 55 | |
| 56 | /* RIP queries. */ |
| 57 | long rip_global_queries = 0; |
| 58 | |
| 59 | /* Prototypes. */ |
| 60 | void rip_event (enum rip_event, int); |
| 61 | |
paul | 727d104 | 2002-12-13 20:50:29 +0000 | [diff] [blame] | 62 | void rip_output_process (struct interface *, struct prefix *, |
paul | cc1131a | 2003-10-15 23:20:17 +0000 | [diff] [blame] | 63 | struct sockaddr_in *, int, u_char, |
| 64 | struct prefix_ipv4 *); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 65 | |
| 66 | /* RIP output routes type. */ |
| 67 | enum |
| 68 | { |
| 69 | rip_all_route, |
| 70 | rip_changed_route |
| 71 | }; |
| 72 | |
| 73 | /* RIP command strings. */ |
| 74 | struct message rip_msg[] = |
| 75 | { |
| 76 | {RIP_REQUEST, "REQUEST"}, |
| 77 | {RIP_RESPONSE, "RESPONSE"}, |
| 78 | {RIP_TRACEON, "TRACEON"}, |
| 79 | {RIP_TRACEOFF, "TRACEOFF"}, |
| 80 | {RIP_POLL, "POLL"}, |
| 81 | {RIP_POLL_ENTRY, "POLL ENTRY"}, |
| 82 | {0, NULL} |
| 83 | }; |
| 84 | |
| 85 | /* Each route type's strings and default preference. */ |
| 86 | struct |
| 87 | { |
| 88 | int key; |
| 89 | char *str; |
| 90 | char *str_long; |
| 91 | } route_info[] = |
| 92 | { |
| 93 | { ZEBRA_ROUTE_SYSTEM, "X", "system"}, |
| 94 | { ZEBRA_ROUTE_KERNEL, "K", "kernel"}, |
| 95 | { ZEBRA_ROUTE_CONNECT, "C", "connected"}, |
| 96 | { ZEBRA_ROUTE_STATIC, "S", "static"}, |
| 97 | { ZEBRA_ROUTE_RIP, "R", "rip"}, |
| 98 | { ZEBRA_ROUTE_RIPNG, "R", "ripng"}, |
| 99 | { ZEBRA_ROUTE_OSPF, "O", "ospf"}, |
| 100 | { ZEBRA_ROUTE_OSPF6, "O", "ospf6"}, |
| 101 | { ZEBRA_ROUTE_BGP, "B", "bgp"} |
| 102 | }; |
| 103 | |
| 104 | /* Utility function to set boradcast option to the socket. */ |
| 105 | int |
| 106 | sockopt_broadcast (int sock) |
| 107 | { |
| 108 | int ret; |
| 109 | int on = 1; |
| 110 | |
| 111 | ret = setsockopt (sock, SOL_SOCKET, SO_BROADCAST, (char *) &on, sizeof on); |
| 112 | if (ret < 0) |
| 113 | { |
| 114 | zlog_warn ("can't set sockopt SO_BROADCAST to socket %d", sock); |
| 115 | return -1; |
| 116 | } |
| 117 | return 0; |
| 118 | } |
| 119 | |
| 120 | int |
| 121 | rip_route_rte (struct rip_info *rinfo) |
| 122 | { |
| 123 | return (rinfo->type == ZEBRA_ROUTE_RIP && rinfo->sub_type == RIP_ROUTE_RTE); |
| 124 | } |
| 125 | |
| 126 | struct rip_info * |
| 127 | rip_info_new () |
| 128 | { |
| 129 | struct rip_info *new; |
| 130 | |
| 131 | new = XMALLOC (MTYPE_RIP_INFO, sizeof (struct rip_info)); |
| 132 | memset (new, 0, sizeof (struct rip_info)); |
| 133 | return new; |
| 134 | } |
| 135 | |
| 136 | void |
| 137 | rip_info_free (struct rip_info *rinfo) |
| 138 | { |
| 139 | XFREE (MTYPE_RIP_INFO, rinfo); |
| 140 | } |
| 141 | |
| 142 | /* RIP route garbage collect timer. */ |
| 143 | int |
| 144 | rip_garbage_collect (struct thread *t) |
| 145 | { |
| 146 | struct rip_info *rinfo; |
| 147 | struct route_node *rp; |
| 148 | |
| 149 | rinfo = THREAD_ARG (t); |
| 150 | rinfo->t_garbage_collect = NULL; |
| 151 | |
| 152 | /* Off timeout timer. */ |
| 153 | RIP_TIMER_OFF (rinfo->t_timeout); |
| 154 | |
| 155 | /* Get route_node pointer. */ |
| 156 | rp = rinfo->rp; |
| 157 | |
| 158 | /* Unlock route_node. */ |
| 159 | rp->info = NULL; |
| 160 | route_unlock_node (rp); |
| 161 | |
| 162 | /* Free RIP routing information. */ |
| 163 | rip_info_free (rinfo); |
| 164 | |
| 165 | return 0; |
| 166 | } |
| 167 | |
| 168 | /* Timeout RIP routes. */ |
| 169 | int |
| 170 | rip_timeout (struct thread *t) |
| 171 | { |
| 172 | struct rip_info *rinfo; |
| 173 | struct route_node *rn; |
| 174 | |
| 175 | rinfo = THREAD_ARG (t); |
| 176 | rinfo->t_timeout = NULL; |
| 177 | |
| 178 | rn = rinfo->rp; |
| 179 | |
| 180 | /* - The garbage-collection timer is set for 120 seconds. */ |
| 181 | RIP_TIMER_ON (rinfo->t_garbage_collect, rip_garbage_collect, |
| 182 | rip->garbage_time); |
| 183 | |
| 184 | rip_zebra_ipv4_delete ((struct prefix_ipv4 *)&rn->p, &rinfo->nexthop, |
| 185 | rinfo->metric); |
| 186 | /* - The metric for the route is set to 16 (infinity). This causes |
| 187 | the route to be removed from service. */ |
| 188 | rinfo->metric = RIP_METRIC_INFINITY; |
| 189 | rinfo->flags &= ~RIP_RTF_FIB; |
| 190 | |
| 191 | /* - The route change flag is to indicate that this entry has been |
| 192 | changed. */ |
| 193 | rinfo->flags |= RIP_RTF_CHANGED; |
| 194 | |
| 195 | /* - The output process is signalled to trigger a response. */ |
| 196 | rip_event (RIP_TRIGGERED_UPDATE, 0); |
| 197 | |
| 198 | return 0; |
| 199 | } |
| 200 | |
| 201 | void |
| 202 | rip_timeout_update (struct rip_info *rinfo) |
| 203 | { |
| 204 | if (rinfo->metric != RIP_METRIC_INFINITY) |
| 205 | { |
| 206 | RIP_TIMER_OFF (rinfo->t_timeout); |
| 207 | RIP_TIMER_ON (rinfo->t_timeout, rip_timeout, rip->timeout_time); |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | int |
| 212 | rip_incoming_filter (struct prefix_ipv4 *p, struct rip_interface *ri) |
| 213 | { |
| 214 | struct distribute *dist; |
| 215 | struct access_list *alist; |
| 216 | struct prefix_list *plist; |
| 217 | |
| 218 | /* Input distribute-list filtering. */ |
| 219 | if (ri->list[RIP_FILTER_IN]) |
| 220 | { |
| 221 | if (access_list_apply (ri->list[RIP_FILTER_IN], |
| 222 | (struct prefix *) p) == FILTER_DENY) |
| 223 | { |
| 224 | if (IS_RIP_DEBUG_PACKET) |
| 225 | zlog_info ("%s/%d filtered by distribute in", |
| 226 | inet_ntoa (p->prefix), p->prefixlen); |
| 227 | return -1; |
| 228 | } |
| 229 | } |
| 230 | if (ri->prefix[RIP_FILTER_IN]) |
| 231 | { |
| 232 | if (prefix_list_apply (ri->prefix[RIP_FILTER_IN], |
| 233 | (struct prefix *) p) == PREFIX_DENY) |
| 234 | { |
| 235 | if (IS_RIP_DEBUG_PACKET) |
| 236 | zlog_info ("%s/%d filtered by prefix-list in", |
| 237 | inet_ntoa (p->prefix), p->prefixlen); |
| 238 | return -1; |
| 239 | } |
| 240 | } |
| 241 | |
| 242 | /* All interface filter check. */ |
| 243 | dist = distribute_lookup (NULL); |
| 244 | if (dist) |
| 245 | { |
| 246 | if (dist->list[DISTRIBUTE_IN]) |
| 247 | { |
| 248 | alist = access_list_lookup (AFI_IP, dist->list[DISTRIBUTE_IN]); |
| 249 | |
| 250 | if (alist) |
| 251 | { |
| 252 | if (access_list_apply (alist, |
| 253 | (struct prefix *) p) == FILTER_DENY) |
| 254 | { |
| 255 | if (IS_RIP_DEBUG_PACKET) |
| 256 | zlog_info ("%s/%d filtered by distribute in", |
| 257 | inet_ntoa (p->prefix), p->prefixlen); |
| 258 | return -1; |
| 259 | } |
| 260 | } |
| 261 | } |
| 262 | if (dist->prefix[DISTRIBUTE_IN]) |
| 263 | { |
| 264 | plist = prefix_list_lookup (AFI_IP, dist->prefix[DISTRIBUTE_IN]); |
| 265 | |
| 266 | if (plist) |
| 267 | { |
| 268 | if (prefix_list_apply (plist, |
| 269 | (struct prefix *) p) == PREFIX_DENY) |
| 270 | { |
| 271 | if (IS_RIP_DEBUG_PACKET) |
| 272 | zlog_info ("%s/%d filtered by prefix-list in", |
| 273 | inet_ntoa (p->prefix), p->prefixlen); |
| 274 | return -1; |
| 275 | } |
| 276 | } |
| 277 | } |
| 278 | } |
| 279 | return 0; |
| 280 | } |
| 281 | |
| 282 | int |
| 283 | rip_outgoing_filter (struct prefix_ipv4 *p, struct rip_interface *ri) |
| 284 | { |
| 285 | struct distribute *dist; |
| 286 | struct access_list *alist; |
| 287 | struct prefix_list *plist; |
| 288 | |
| 289 | if (ri->list[RIP_FILTER_OUT]) |
| 290 | { |
| 291 | if (access_list_apply (ri->list[RIP_FILTER_OUT], |
| 292 | (struct prefix *) p) == FILTER_DENY) |
| 293 | { |
| 294 | if (IS_RIP_DEBUG_PACKET) |
| 295 | zlog_info ("%s/%d is filtered by distribute out", |
| 296 | inet_ntoa (p->prefix), p->prefixlen); |
| 297 | return -1; |
| 298 | } |
| 299 | } |
| 300 | if (ri->prefix[RIP_FILTER_OUT]) |
| 301 | { |
| 302 | if (prefix_list_apply (ri->prefix[RIP_FILTER_OUT], |
| 303 | (struct prefix *) p) == PREFIX_DENY) |
| 304 | { |
| 305 | if (IS_RIP_DEBUG_PACKET) |
| 306 | zlog_info ("%s/%d is filtered by prefix-list out", |
| 307 | inet_ntoa (p->prefix), p->prefixlen); |
| 308 | return -1; |
| 309 | } |
| 310 | } |
| 311 | |
| 312 | /* All interface filter check. */ |
| 313 | dist = distribute_lookup (NULL); |
| 314 | if (dist) |
| 315 | { |
| 316 | if (dist->list[DISTRIBUTE_OUT]) |
| 317 | { |
| 318 | alist = access_list_lookup (AFI_IP, dist->list[DISTRIBUTE_OUT]); |
| 319 | |
| 320 | if (alist) |
| 321 | { |
| 322 | if (access_list_apply (alist, |
| 323 | (struct prefix *) p) == FILTER_DENY) |
| 324 | { |
| 325 | if (IS_RIP_DEBUG_PACKET) |
| 326 | zlog_info ("%s/%d filtered by distribute out", |
| 327 | inet_ntoa (p->prefix), p->prefixlen); |
| 328 | return -1; |
| 329 | } |
| 330 | } |
| 331 | } |
| 332 | if (dist->prefix[DISTRIBUTE_OUT]) |
| 333 | { |
| 334 | plist = prefix_list_lookup (AFI_IP, dist->prefix[DISTRIBUTE_OUT]); |
| 335 | |
| 336 | if (plist) |
| 337 | { |
| 338 | if (prefix_list_apply (plist, |
| 339 | (struct prefix *) p) == PREFIX_DENY) |
| 340 | { |
| 341 | if (IS_RIP_DEBUG_PACKET) |
| 342 | zlog_info ("%s/%d filtered by prefix-list out", |
| 343 | inet_ntoa (p->prefix), p->prefixlen); |
| 344 | return -1; |
| 345 | } |
| 346 | } |
| 347 | } |
| 348 | } |
| 349 | return 0; |
| 350 | } |
| 351 | |
| 352 | /* Check nexthop address validity. */ |
| 353 | static int |
| 354 | rip_nexthop_check (struct in_addr *addr) |
| 355 | { |
| 356 | listnode node; |
| 357 | listnode cnode; |
| 358 | struct interface *ifp; |
| 359 | struct connected *ifc; |
| 360 | struct prefix *p; |
| 361 | |
| 362 | /* If nexthop address matches local configured address then it is |
| 363 | invalid nexthop. */ |
| 364 | for (node = listhead (iflist); node; nextnode (node)) |
| 365 | { |
| 366 | ifp = getdata (node); |
| 367 | |
| 368 | for (cnode = listhead (ifp->connected); cnode; nextnode (cnode)) |
| 369 | { |
| 370 | ifc = getdata (cnode); |
| 371 | p = ifc->address; |
| 372 | |
| 373 | if (p->family == AF_INET |
| 374 | && IPV4_ADDR_SAME (&p->u.prefix4, addr)) |
| 375 | return -1; |
| 376 | } |
| 377 | } |
| 378 | return 0; |
| 379 | } |
| 380 | |
| 381 | /* RIP add route to routing table. */ |
| 382 | void |
| 383 | rip_rte_process (struct rte *rte, struct sockaddr_in *from, |
| 384 | struct interface *ifp) |
| 385 | |
| 386 | { |
| 387 | int ret; |
| 388 | struct prefix_ipv4 p; |
| 389 | struct route_node *rp; |
| 390 | struct rip_info *rinfo; |
| 391 | struct rip_interface *ri; |
| 392 | struct in_addr *nexthop; |
| 393 | u_char oldmetric; |
| 394 | int same = 0; |
| 395 | |
| 396 | /* Make prefix structure. */ |
| 397 | memset (&p, 0, sizeof (struct prefix_ipv4)); |
| 398 | p.family = AF_INET; |
| 399 | p.prefix = rte->prefix; |
| 400 | p.prefixlen = ip_masklen (rte->mask); |
| 401 | |
| 402 | /* Make sure mask is applied. */ |
| 403 | apply_mask_ipv4 (&p); |
| 404 | |
| 405 | /* Apply input filters. */ |
| 406 | ri = ifp->info; |
| 407 | |
| 408 | ret = rip_incoming_filter (&p, ri); |
| 409 | if (ret < 0) |
| 410 | return; |
| 411 | |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 412 | /* Modify entry according to the interface routemap. */ |
| 413 | if (ri->routemap[RIP_FILTER_IN]) |
| 414 | { |
| 415 | int ret; |
| 416 | struct rip_info newinfo; |
| 417 | |
| 418 | memset (&newinfo, 0, sizeof (newinfo)); |
| 419 | newinfo.type = ZEBRA_ROUTE_RIP; |
| 420 | newinfo.sub_type = RIP_ROUTE_RTE; |
| 421 | newinfo.nexthop= rte->nexthop; |
| 422 | newinfo.from = from->sin_addr; |
| 423 | newinfo.ifindex= ifp->ifindex; |
| 424 | newinfo.metric = rte->metric; |
| 425 | newinfo.metric_out = rte->metric; /* XXX */ |
| 426 | newinfo.tag = ntohs(rte->tag); /* XXX */ |
| 427 | |
| 428 | /* The object should be of the type of rip_info */ |
| 429 | ret = route_map_apply (ri->routemap[RIP_FILTER_IN], |
| 430 | (struct prefix *)&p, RMAP_RIP, &newinfo); |
| 431 | |
| 432 | if (ret == RMAP_DENYMATCH) |
| 433 | { |
| 434 | if (IS_RIP_DEBUG_PACKET) |
| 435 | zlog_info ("RIP %s/%d is filtered by route-map in", |
| 436 | inet_ntoa (p.prefix), p.prefixlen); |
| 437 | return; |
| 438 | } |
| 439 | |
| 440 | /* Get back the object */ |
| 441 | rte->nexthop = newinfo.nexthop_out; |
| 442 | rte->tag = htons(newinfo.tag_out); /* XXX */ |
| 443 | rte->metric = newinfo.metric_out; /* XXX: the routemap uses the metric_out field */ |
| 444 | } |
| 445 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 446 | /* Once the entry has been validated, update the metric by |
| 447 | adding the cost of the network on wich the message |
| 448 | arrived. If the result is greater than infinity, use infinity |
| 449 | (RFC2453 Sec. 3.9.2) */ |
| 450 | /* Zebra ripd can handle offset-list in. */ |
| 451 | ret = rip_offset_list_apply_in (&p, ifp, &rte->metric); |
| 452 | |
| 453 | /* If offset-list does not modify the metric use interface's |
| 454 | metric. */ |
| 455 | if (! ret) |
| 456 | rte->metric += ifp->metric; |
| 457 | |
| 458 | if (rte->metric > RIP_METRIC_INFINITY) |
| 459 | rte->metric = RIP_METRIC_INFINITY; |
| 460 | |
| 461 | /* Set nexthop pointer. */ |
| 462 | if (rte->nexthop.s_addr == 0) |
| 463 | nexthop = &from->sin_addr; |
| 464 | else |
| 465 | nexthop = &rte->nexthop; |
| 466 | |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 467 | /* Check if nexthop address is myself, then do nothing. */ |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 468 | if (rip_nexthop_check (nexthop) < 0) |
| 469 | { |
| 470 | if (IS_RIP_DEBUG_PACKET) |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 471 | zlog_info ("Nexthop address %s is myself", inet_ntoa (*nexthop)); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 472 | return; |
| 473 | } |
| 474 | |
| 475 | /* Get index for the prefix. */ |
| 476 | rp = route_node_get (rip->table, (struct prefix *) &p); |
| 477 | |
| 478 | /* Check to see whether there is already RIP route on the table. */ |
| 479 | rinfo = rp->info; |
| 480 | |
| 481 | if (rinfo) |
| 482 | { |
| 483 | /* Redistributed route check. */ |
| 484 | if (rinfo->type != ZEBRA_ROUTE_RIP |
| 485 | && rinfo->metric != RIP_METRIC_INFINITY) |
| 486 | return; |
| 487 | |
| 488 | /* Local static route. */ |
| 489 | if (rinfo->type == ZEBRA_ROUTE_RIP |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 490 | && ((rinfo->sub_type == RIP_ROUTE_STATIC) || |
| 491 | (rinfo->sub_type == RIP_ROUTE_DEFAULT)) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 492 | && rinfo->metric != RIP_METRIC_INFINITY) |
| 493 | return; |
| 494 | } |
| 495 | |
| 496 | if (! rinfo) |
| 497 | { |
| 498 | /* Now, check to see whether there is already an explicit route |
| 499 | for the destination prefix. If there is no such route, add |
| 500 | this route to the routing table, unless the metric is |
| 501 | infinity (there is no point in adding a route which |
| 502 | unusable). */ |
| 503 | if (rte->metric != RIP_METRIC_INFINITY) |
| 504 | { |
| 505 | rinfo = rip_info_new (); |
| 506 | |
| 507 | /* - Setting the destination prefix and length to those in |
| 508 | the RTE. */ |
| 509 | rinfo->rp = rp; |
| 510 | |
| 511 | /* - Setting the metric to the newly calculated metric (as |
| 512 | described above). */ |
| 513 | rinfo->metric = rte->metric; |
| 514 | rinfo->tag = ntohs (rte->tag); |
| 515 | |
| 516 | /* - Set the next hop address to be the address of the router |
| 517 | from which the datagram came or the next hop address |
| 518 | specified by a next hop RTE. */ |
| 519 | IPV4_ADDR_COPY (&rinfo->nexthop, nexthop); |
| 520 | IPV4_ADDR_COPY (&rinfo->from, &from->sin_addr); |
| 521 | rinfo->ifindex = ifp->ifindex; |
| 522 | |
| 523 | /* - Initialize the timeout for the route. If the |
| 524 | garbage-collection timer is running for this route, stop it |
| 525 | (see section 2.3 for a discussion of the timers). */ |
| 526 | rip_timeout_update (rinfo); |
| 527 | |
| 528 | /* - Set the route change flag. */ |
| 529 | rinfo->flags |= RIP_RTF_CHANGED; |
| 530 | |
| 531 | /* - Signal the output process to trigger an update (see section |
| 532 | 2.5). */ |
| 533 | rip_event (RIP_TRIGGERED_UPDATE, 0); |
| 534 | |
| 535 | /* Finally, route goes into the kernel. */ |
| 536 | rinfo->type = ZEBRA_ROUTE_RIP; |
| 537 | rinfo->sub_type = RIP_ROUTE_RTE; |
| 538 | |
| 539 | /* Set distance value. */ |
| 540 | rinfo->distance = rip_distance_apply (rinfo); |
| 541 | |
| 542 | rp->info = rinfo; |
| 543 | rip_zebra_ipv4_add (&p, &rinfo->nexthop, rinfo->metric, |
| 544 | rinfo->distance); |
| 545 | rinfo->flags |= RIP_RTF_FIB; |
| 546 | } |
| 547 | } |
| 548 | else |
| 549 | { |
| 550 | /* Route is there but we are not sure the route is RIP or not. */ |
| 551 | rinfo = rp->info; |
| 552 | |
| 553 | /* If there is an existing route, compare the next hop address |
| 554 | to the address of the router from which the datagram came. |
| 555 | If this datagram is from the same router as the existing |
| 556 | route, reinitialize the timeout. */ |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 557 | same = (IPV4_ADDR_SAME (&rinfo->from, &from->sin_addr) |
| 558 | && (rinfo->ifindex == ifp->ifindex)); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 559 | |
| 560 | if (same) |
| 561 | rip_timeout_update (rinfo); |
| 562 | |
| 563 | /* Next, compare the metrics. If the datagram is from the same |
| 564 | router as the existing route, and the new metric is different |
| 565 | than the old one; or, if the new metric is lower than the old |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 566 | one, or if the tag has been changed; do the following actions: */ |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 567 | if ((same && rinfo->metric != rte->metric) || |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 568 | (rte->metric < rinfo->metric) || |
| 569 | (same && (rinfo->metric == rte->metric) && ntohs(rte->tag) != rinfo->tag)) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 570 | { |
| 571 | /* - Adopt the route from the datagram. That is, put the |
| 572 | new metric in, and adjust the next hop address (if |
| 573 | necessary). */ |
| 574 | oldmetric = rinfo->metric; |
| 575 | rinfo->metric = rte->metric; |
| 576 | rinfo->tag = ntohs (rte->tag); |
| 577 | IPV4_ADDR_COPY (&rinfo->from, &from->sin_addr); |
| 578 | rinfo->ifindex = ifp->ifindex; |
| 579 | rinfo->distance = rip_distance_apply (rinfo); |
| 580 | |
| 581 | /* Should a new route to this network be established |
| 582 | while the garbage-collection timer is running, the |
| 583 | new route will replace the one that is about to be |
| 584 | deleted. In this case the garbage-collection timer |
| 585 | must be cleared. */ |
| 586 | |
| 587 | if (oldmetric == RIP_METRIC_INFINITY && |
| 588 | rinfo->metric < RIP_METRIC_INFINITY) |
| 589 | { |
| 590 | rinfo->type = ZEBRA_ROUTE_RIP; |
| 591 | rinfo->sub_type = RIP_ROUTE_RTE; |
| 592 | |
| 593 | RIP_TIMER_OFF (rinfo->t_garbage_collect); |
| 594 | |
| 595 | if (! IPV4_ADDR_SAME (&rinfo->nexthop, nexthop)) |
| 596 | IPV4_ADDR_COPY (&rinfo->nexthop, nexthop); |
| 597 | |
| 598 | rip_zebra_ipv4_add (&p, nexthop, rinfo->metric, |
| 599 | rinfo->distance); |
| 600 | rinfo->flags |= RIP_RTF_FIB; |
| 601 | } |
| 602 | |
| 603 | /* Update nexthop and/or metric value. */ |
| 604 | if (oldmetric != RIP_METRIC_INFINITY) |
| 605 | { |
| 606 | rip_zebra_ipv4_delete (&p, &rinfo->nexthop, oldmetric); |
| 607 | rip_zebra_ipv4_add (&p, nexthop, rinfo->metric, |
| 608 | rinfo->distance); |
| 609 | rinfo->flags |= RIP_RTF_FIB; |
| 610 | |
| 611 | if (! IPV4_ADDR_SAME (&rinfo->nexthop, nexthop)) |
| 612 | IPV4_ADDR_COPY (&rinfo->nexthop, nexthop); |
| 613 | } |
| 614 | |
| 615 | /* - Set the route change flag and signal the output process |
| 616 | to trigger an update. */ |
| 617 | rinfo->flags |= RIP_RTF_CHANGED; |
| 618 | rip_event (RIP_TRIGGERED_UPDATE, 0); |
| 619 | |
| 620 | /* - If the new metric is infinity, start the deletion |
| 621 | process (described above); */ |
| 622 | if (rinfo->metric == RIP_METRIC_INFINITY) |
| 623 | { |
| 624 | /* If the new metric is infinity, the deletion process |
| 625 | begins for the route, which is no longer used for |
| 626 | routing packets. Note that the deletion process is |
| 627 | started only when the metric is first set to |
| 628 | infinity. If the metric was already infinity, then a |
| 629 | new deletion process is not started. */ |
| 630 | if (oldmetric != RIP_METRIC_INFINITY) |
| 631 | { |
| 632 | /* - The garbage-collection timer is set for 120 seconds. */ |
| 633 | RIP_TIMER_ON (rinfo->t_garbage_collect, |
| 634 | rip_garbage_collect, rip->garbage_time); |
| 635 | RIP_TIMER_OFF (rinfo->t_timeout); |
| 636 | |
| 637 | /* - The metric for the route is set to 16 |
| 638 | (infinity). This causes the route to be removed |
| 639 | from service.*/ |
| 640 | rip_zebra_ipv4_delete (&p, &rinfo->nexthop, oldmetric); |
| 641 | rinfo->flags &= ~RIP_RTF_FIB; |
| 642 | |
| 643 | /* - The route change flag is to indicate that this |
| 644 | entry has been changed. */ |
| 645 | /* - The output process is signalled to trigger a |
| 646 | response. */ |
| 647 | ; /* Above processes are already done previously. */ |
| 648 | } |
| 649 | } |
| 650 | else |
| 651 | { |
| 652 | /* otherwise, re-initialize the timeout. */ |
| 653 | rip_timeout_update (rinfo); |
| 654 | } |
| 655 | } |
| 656 | /* Unlock tempolary lock of the route. */ |
| 657 | route_unlock_node (rp); |
| 658 | } |
| 659 | } |
| 660 | |
| 661 | /* Dump RIP packet */ |
| 662 | void |
| 663 | rip_packet_dump (struct rip_packet *packet, int size, char *sndrcv) |
| 664 | { |
| 665 | caddr_t lim; |
| 666 | struct rte *rte; |
| 667 | char *command_str; |
| 668 | char pbuf[BUFSIZ], nbuf[BUFSIZ]; |
| 669 | u_char netmask = 0; |
| 670 | u_char *p; |
| 671 | |
| 672 | /* Set command string. */ |
| 673 | if (packet->command > 0 && packet->command < RIP_COMMAND_MAX) |
| 674 | command_str = lookup (rip_msg, packet->command); |
| 675 | else |
| 676 | command_str = "unknown"; |
| 677 | |
| 678 | /* Dump packet header. */ |
| 679 | zlog_info ("%s %s version %d packet size %d", |
| 680 | sndrcv, command_str, packet->version, size); |
| 681 | |
| 682 | /* Dump each routing table entry. */ |
| 683 | rte = packet->rte; |
| 684 | |
| 685 | for (lim = (caddr_t) packet + size; (caddr_t) rte < lim; rte++) |
| 686 | { |
| 687 | if (packet->version == RIPv2) |
| 688 | { |
| 689 | netmask = ip_masklen (rte->mask); |
| 690 | |
| 691 | if (ntohs (rte->family) == 0xffff) |
| 692 | { |
| 693 | if (ntohs (rte->tag) == RIP_AUTH_SIMPLE_PASSWORD) |
| 694 | { |
| 695 | p = (u_char *)&rte->prefix; |
| 696 | |
| 697 | zlog_info (" family 0x%X type %d auth string: %s", |
| 698 | ntohs (rte->family), ntohs (rte->tag), p); |
| 699 | } |
| 700 | else if (ntohs (rte->tag) == RIP_AUTH_MD5) |
| 701 | { |
| 702 | struct rip_md5_info *md5; |
| 703 | |
| 704 | md5 = (struct rip_md5_info *) &packet->rte; |
| 705 | |
| 706 | zlog_info (" family 0x%X type %d (MD5 authentication)", |
| 707 | ntohs (md5->family), ntohs (md5->type)); |
| 708 | zlog_info (" RIP-2 packet len %d Key ID %d" |
| 709 | " Auth Data len %d", ntohs (md5->packet_len), |
| 710 | md5->keyid, md5->auth_len); |
| 711 | zlog_info (" Sequence Number %ld", (u_long)ntohl (md5->sequence)); |
| 712 | } |
| 713 | else if (ntohs (rte->tag) == RIP_AUTH_DATA) |
| 714 | { |
| 715 | p = (u_char *)&rte->prefix; |
| 716 | |
| 717 | zlog_info (" family 0x%X type %d (MD5 data)", |
| 718 | ntohs (rte->family), ntohs (rte->tag)); |
| 719 | zlog_info (" MD5: %02X%02X%02X%02X%02X%02X%02X%02X" |
| 720 | "%02X%02X%02X%02X%02X%02X%02X", |
| 721 | p[0],p[1],p[2],p[3],p[4],p[5],p[6],p[7], |
| 722 | p[9],p[10],p[11],p[12],p[13],p[14],p[15]); |
| 723 | } |
| 724 | else |
| 725 | { |
| 726 | zlog_info (" family 0x%X type %d (Unknown auth type)", |
| 727 | ntohs (rte->family), ntohs (rte->tag)); |
| 728 | } |
| 729 | } |
| 730 | else |
| 731 | zlog_info (" %s/%d -> %s family %d tag %d metric %ld", |
| 732 | inet_ntop (AF_INET, &rte->prefix, pbuf, BUFSIZ),netmask, |
| 733 | inet_ntop (AF_INET, &rte->nexthop, nbuf, BUFSIZ), |
| 734 | ntohs (rte->family), ntohs (rte->tag), |
| 735 | (u_long)ntohl (rte->metric)); |
| 736 | } |
| 737 | else |
| 738 | { |
| 739 | zlog_info (" %s family %d tag %d metric %ld", |
| 740 | inet_ntop (AF_INET, &rte->prefix, pbuf, BUFSIZ), |
| 741 | ntohs (rte->family), ntohs (rte->tag), |
| 742 | (u_long)ntohl (rte->metric)); |
| 743 | } |
| 744 | } |
| 745 | } |
| 746 | |
| 747 | /* Check if the destination address is valid (unicast; not net 0 |
| 748 | or 127) (RFC2453 Section 3.9.2 - Page 26). But we don't |
| 749 | check net 0 because we accept default route. */ |
| 750 | int |
| 751 | rip_destination_check (struct in_addr addr) |
| 752 | { |
| 753 | u_int32_t destination; |
| 754 | |
| 755 | /* Convert to host byte order. */ |
| 756 | destination = ntohl (addr.s_addr); |
| 757 | |
| 758 | if (IPV4_NET127 (destination)) |
| 759 | return 0; |
| 760 | |
| 761 | /* Net 0 may match to the default route. */ |
| 762 | if (IPV4_NET0 (destination) && destination != 0) |
| 763 | return 0; |
| 764 | |
| 765 | /* Unicast address must belong to class A, B, C. */ |
| 766 | if (IN_CLASSA (destination)) |
| 767 | return 1; |
| 768 | if (IN_CLASSB (destination)) |
| 769 | return 1; |
| 770 | if (IN_CLASSC (destination)) |
| 771 | return 1; |
| 772 | |
| 773 | return 0; |
| 774 | } |
| 775 | |
| 776 | /* RIP version 2 authentication. */ |
| 777 | int |
| 778 | rip_auth_simple_password (struct rte *rte, struct sockaddr_in *from, |
| 779 | struct interface *ifp) |
| 780 | { |
| 781 | struct rip_interface *ri; |
| 782 | char *auth_str; |
| 783 | |
| 784 | if (IS_RIP_DEBUG_EVENT) |
| 785 | zlog_info ("RIPv2 simple password authentication from %s", |
| 786 | inet_ntoa (from->sin_addr)); |
| 787 | |
| 788 | ri = ifp->info; |
| 789 | |
| 790 | if (ri->auth_type != RIP_AUTH_SIMPLE_PASSWORD |
| 791 | || ntohs (rte->tag) != RIP_AUTH_SIMPLE_PASSWORD) |
| 792 | return 0; |
| 793 | |
| 794 | /* Simple password authentication. */ |
| 795 | if (ri->auth_str) |
| 796 | { |
| 797 | auth_str = (char *) &rte->prefix; |
| 798 | |
| 799 | if (strncmp (auth_str, ri->auth_str, 16) == 0) |
| 800 | return 1; |
| 801 | } |
| 802 | if (ri->key_chain) |
| 803 | { |
| 804 | struct keychain *keychain; |
| 805 | struct key *key; |
| 806 | |
| 807 | keychain = keychain_lookup (ri->key_chain); |
| 808 | if (keychain == NULL) |
| 809 | return 0; |
| 810 | |
| 811 | key = key_match_for_accept (keychain, (char *) &rte->prefix); |
| 812 | if (key) |
| 813 | return 1; |
| 814 | } |
| 815 | return 0; |
| 816 | } |
| 817 | |
| 818 | /* RIP version 2 authentication with MD5. */ |
| 819 | int |
| 820 | rip_auth_md5 (struct rip_packet *packet, struct sockaddr_in *from, |
| 821 | struct interface *ifp) |
| 822 | { |
| 823 | struct rip_interface *ri; |
| 824 | struct rip_md5_info *md5; |
| 825 | struct rip_md5_data *md5data; |
| 826 | struct keychain *keychain; |
| 827 | struct key *key; |
| 828 | struct md5_ctx ctx; |
| 829 | u_char pdigest[RIP_AUTH_MD5_SIZE]; |
| 830 | u_char digest[RIP_AUTH_MD5_SIZE]; |
| 831 | u_int16_t packet_len; |
| 832 | char *auth_str = NULL; |
| 833 | |
| 834 | if (IS_RIP_DEBUG_EVENT) |
| 835 | zlog_info ("RIPv2 MD5 authentication from %s", inet_ntoa (from->sin_addr)); |
| 836 | |
| 837 | ri = ifp->info; |
| 838 | md5 = (struct rip_md5_info *) &packet->rte; |
| 839 | |
| 840 | /* Check auth type. */ |
| 841 | if (ri->auth_type != RIP_AUTH_MD5 || ntohs (md5->type) != RIP_AUTH_MD5) |
| 842 | return 0; |
| 843 | |
| 844 | if (md5->auth_len != RIP_HEADER_SIZE + RIP_AUTH_MD5_SIZE) |
| 845 | return 0; |
| 846 | |
| 847 | if (ri->key_chain) |
| 848 | { |
| 849 | keychain = keychain_lookup (ri->key_chain); |
| 850 | if (keychain == NULL) |
| 851 | return 0; |
| 852 | |
| 853 | key = key_lookup_for_accept (keychain, md5->keyid); |
| 854 | if (key == NULL) |
| 855 | return 0; |
| 856 | |
| 857 | auth_str = key->string; |
| 858 | } |
| 859 | |
| 860 | if (ri->auth_str) |
| 861 | auth_str = ri->auth_str; |
| 862 | |
| 863 | if (! auth_str) |
| 864 | return 0; |
| 865 | |
| 866 | /* MD5 digest authentication. */ |
| 867 | packet_len = ntohs (md5->packet_len); |
| 868 | md5data = (struct rip_md5_data *)(((u_char *) packet) + packet_len); |
| 869 | |
| 870 | /* Save digest to pdigest. */ |
| 871 | memcpy (pdigest, md5data->digest, RIP_AUTH_MD5_SIZE); |
| 872 | |
| 873 | /* Overwrite digest by my secret. */ |
| 874 | memset (md5data->digest, 0, RIP_AUTH_MD5_SIZE); |
| 875 | strncpy (md5data->digest, auth_str, RIP_AUTH_MD5_SIZE); |
| 876 | |
| 877 | md5_init_ctx (&ctx); |
| 878 | md5_process_bytes (packet, packet_len + md5->auth_len, &ctx); |
| 879 | md5_finish_ctx (&ctx, digest); |
| 880 | |
| 881 | if (memcmp (pdigest, digest, RIP_AUTH_MD5_SIZE) == 0) |
| 882 | return packet_len; |
| 883 | else |
| 884 | return 0; |
| 885 | } |
| 886 | |
| 887 | void |
| 888 | rip_auth_md5_set (struct stream *s, struct interface *ifp) |
| 889 | { |
| 890 | struct rip_interface *ri; |
| 891 | struct keychain *keychain = NULL; |
| 892 | struct key *key = NULL; |
| 893 | unsigned long len; |
| 894 | struct md5_ctx ctx; |
| 895 | unsigned char secret[RIP_AUTH_MD5_SIZE]; |
| 896 | unsigned char digest[RIP_AUTH_MD5_SIZE]; |
| 897 | char *auth_str = NULL; |
| 898 | |
| 899 | ri = ifp->info; |
| 900 | |
| 901 | /* Make it sure this interface is configured as MD5 |
| 902 | authentication. */ |
| 903 | if (ri->auth_type != RIP_AUTH_MD5) |
| 904 | return; |
| 905 | |
| 906 | /* Lookup key chain. */ |
| 907 | if (ri->key_chain) |
| 908 | { |
| 909 | keychain = keychain_lookup (ri->key_chain); |
| 910 | if (keychain == NULL) |
| 911 | return; |
| 912 | |
| 913 | /* Lookup key. */ |
| 914 | key = key_lookup_for_send (keychain); |
| 915 | if (key == NULL) |
| 916 | return; |
| 917 | |
| 918 | auth_str = key->string; |
| 919 | } |
| 920 | |
| 921 | if (ri->auth_str) |
| 922 | auth_str = ri->auth_str; |
| 923 | |
| 924 | if (! auth_str) |
| 925 | return; |
| 926 | |
| 927 | /* Get packet length. */ |
| 928 | len = s->putp; |
| 929 | |
| 930 | /* Check packet length. */ |
| 931 | if (len < (RIP_HEADER_SIZE + RIP_RTE_SIZE)) |
| 932 | { |
| 933 | zlog_err ("rip_auth_md5_set(): packet length %ld is less than minimum length.", len); |
| 934 | return; |
| 935 | } |
| 936 | |
| 937 | /* Move RTE. */ |
| 938 | memmove (s->data + RIP_HEADER_SIZE + RIP_RTE_SIZE, |
| 939 | s->data + RIP_HEADER_SIZE, |
| 940 | len - RIP_HEADER_SIZE); |
| 941 | |
| 942 | /* Set pointer to authentication header. */ |
| 943 | stream_set_putp (s, RIP_HEADER_SIZE); |
| 944 | len += RIP_RTE_SIZE; |
| 945 | |
| 946 | /* MD5 authentication. */ |
| 947 | stream_putw (s, 0xffff); |
| 948 | stream_putw (s, RIP_AUTH_MD5); |
| 949 | |
| 950 | /* RIP-2 Packet length. Actual value is filled in |
| 951 | rip_auth_md5_set(). */ |
| 952 | stream_putw (s, len); |
| 953 | |
| 954 | /* Key ID. */ |
| 955 | if (key) |
| 956 | stream_putc (s, key->index % 256); |
| 957 | else |
| 958 | stream_putc (s, 1); |
| 959 | |
| 960 | /* Auth Data Len. Set 16 for MD5 authentication |
| 961 | data. */ |
| 962 | stream_putc (s, RIP_AUTH_MD5_SIZE + RIP_HEADER_SIZE); |
| 963 | |
| 964 | /* Sequence Number (non-decreasing). */ |
| 965 | /* RFC2080: The value used in the sequence number is |
| 966 | arbitrary, but two suggestions are the time of the |
| 967 | message's creation or a simple message counter. */ |
| 968 | stream_putl (s, time (NULL)); |
| 969 | |
| 970 | /* Reserved field must be zero. */ |
| 971 | stream_putl (s, 0); |
| 972 | stream_putl (s, 0); |
| 973 | |
| 974 | /* Set pointer to authentication data. */ |
| 975 | stream_set_putp (s, len); |
| 976 | |
| 977 | /* Set authentication data. */ |
| 978 | stream_putw (s, 0xffff); |
| 979 | stream_putw (s, 0x01); |
| 980 | |
| 981 | /* Generate a digest for the RIP packet. */ |
| 982 | memset (secret, 0, RIP_AUTH_MD5_SIZE); |
| 983 | strncpy (secret, auth_str, RIP_AUTH_MD5_SIZE); |
| 984 | md5_init_ctx (&ctx); |
| 985 | md5_process_bytes (s->data, s->endp, &ctx); |
| 986 | md5_process_bytes (secret, RIP_AUTH_MD5_SIZE, &ctx); |
| 987 | md5_finish_ctx (&ctx, digest); |
| 988 | |
| 989 | /* Copy the digest to the packet. */ |
| 990 | stream_write (s, digest, RIP_AUTH_MD5_SIZE); |
| 991 | } |
| 992 | |
| 993 | /* RIP routing information. */ |
| 994 | void |
| 995 | rip_response_process (struct rip_packet *packet, int size, |
| 996 | struct sockaddr_in *from, struct interface *ifp) |
| 997 | { |
| 998 | caddr_t lim; |
| 999 | struct rte *rte; |
paul | 727d104 | 2002-12-13 20:50:29 +0000 | [diff] [blame] | 1000 | struct prefix_ipv4 ifaddr; |
| 1001 | struct prefix_ipv4 ifaddrclass; |
| 1002 | struct connected *c; |
| 1003 | int subnetted; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1004 | |
paul | 727d104 | 2002-12-13 20:50:29 +0000 | [diff] [blame] | 1005 | /* We don't know yet. */ |
| 1006 | subnetted = -1; |
| 1007 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1008 | /* The Response must be ignored if it is not from the RIP |
| 1009 | port. (RFC2453 - Sec. 3.9.2)*/ |
| 1010 | if (ntohs (from->sin_port) != RIP_PORT_DEFAULT) |
| 1011 | { |
| 1012 | zlog_info ("response doesn't come from RIP port: %d", |
| 1013 | from->sin_port); |
| 1014 | rip_peer_bad_packet (from); |
| 1015 | return; |
| 1016 | } |
| 1017 | |
| 1018 | /* The datagram's IPv4 source address should be checked to see |
| 1019 | whether the datagram is from a valid neighbor; the source of the |
| 1020 | datagram must be on a directly connected network */ |
paul | 31a476c | 2003-09-29 19:54:53 +0000 | [diff] [blame] | 1021 | if (! if_valid_neighbor (from->sin_addr)) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1022 | { |
| 1023 | zlog_info ("This datagram doesn't came from a valid neighbor: %s", |
| 1024 | inet_ntoa (from->sin_addr)); |
| 1025 | rip_peer_bad_packet (from); |
| 1026 | return; |
| 1027 | } |
| 1028 | |
| 1029 | /* It is also worth checking to see whether the response is from one |
| 1030 | of the router's own addresses. */ |
| 1031 | |
| 1032 | ; /* Alredy done in rip_read () */ |
| 1033 | |
| 1034 | /* Update RIP peer. */ |
| 1035 | rip_peer_update (from, packet->version); |
| 1036 | |
| 1037 | /* Set RTE pointer. */ |
| 1038 | rte = packet->rte; |
| 1039 | |
| 1040 | for (lim = (caddr_t) packet + size; (caddr_t) rte < lim; rte++) |
| 1041 | { |
| 1042 | /* RIPv2 authentication check. */ |
| 1043 | /* If the Address Family Identifier of the first (and only the |
| 1044 | first) entry in the message is 0xFFFF, then the remainder of |
| 1045 | the entry contains the authentication. */ |
| 1046 | /* If the packet gets here it means authentication enabled */ |
| 1047 | /* Check is done in rip_read(). So, just skipping it */ |
| 1048 | if (packet->version == RIPv2 && |
| 1049 | rte == packet->rte && |
| 1050 | rte->family == 0xffff) |
| 1051 | continue; |
| 1052 | |
| 1053 | if (ntohs (rte->family) != AF_INET) |
| 1054 | { |
| 1055 | /* Address family check. RIP only supports AF_INET. */ |
| 1056 | zlog_info ("Unsupported family %d from %s.", |
| 1057 | ntohs (rte->family), inet_ntoa (from->sin_addr)); |
| 1058 | continue; |
| 1059 | } |
| 1060 | |
| 1061 | /* - is the destination address valid (e.g., unicast; not net 0 |
| 1062 | or 127) */ |
| 1063 | if (! rip_destination_check (rte->prefix)) |
| 1064 | { |
| 1065 | zlog_info ("Network is net 0 or net 127 or it is not unicast network"); |
| 1066 | rip_peer_bad_route (from); |
| 1067 | continue; |
| 1068 | } |
| 1069 | |
| 1070 | /* Convert metric value to host byte order. */ |
| 1071 | rte->metric = ntohl (rte->metric); |
| 1072 | |
| 1073 | /* - is the metric valid (i.e., between 1 and 16, inclusive) */ |
| 1074 | if (! (rte->metric >= 1 && rte->metric <= 16)) |
| 1075 | { |
| 1076 | zlog_info ("Route's metric is not in the 1-16 range."); |
| 1077 | rip_peer_bad_route (from); |
| 1078 | continue; |
| 1079 | } |
| 1080 | |
| 1081 | /* RIPv1 does not have nexthop value. */ |
| 1082 | if (packet->version == RIPv1 && rte->nexthop.s_addr != 0) |
| 1083 | { |
| 1084 | zlog_info ("RIPv1 packet with nexthop value %s", |
| 1085 | inet_ntoa (rte->nexthop)); |
| 1086 | rip_peer_bad_route (from); |
| 1087 | continue; |
| 1088 | } |
| 1089 | |
| 1090 | /* That is, if the provided information is ignored, a possibly |
| 1091 | sub-optimal, but absolutely valid, route may be taken. If |
| 1092 | the received Next Hop is not directly reachable, it should be |
| 1093 | treated as 0.0.0.0. */ |
| 1094 | if (packet->version == RIPv2 && rte->nexthop.s_addr != 0) |
| 1095 | { |
| 1096 | u_int32_t addrval; |
| 1097 | |
| 1098 | /* Multicast address check. */ |
| 1099 | addrval = ntohl (rte->nexthop.s_addr); |
| 1100 | if (IN_CLASSD (addrval)) |
| 1101 | { |
| 1102 | zlog_info ("Nexthop %s is multicast address, skip this rte", |
| 1103 | inet_ntoa (rte->nexthop)); |
| 1104 | continue; |
| 1105 | } |
| 1106 | |
| 1107 | if (! if_lookup_address (rte->nexthop)) |
| 1108 | { |
| 1109 | struct route_node *rn; |
| 1110 | struct rip_info *rinfo; |
| 1111 | |
| 1112 | rn = route_node_match_ipv4 (rip->table, &rte->nexthop); |
| 1113 | |
| 1114 | if (rn) |
| 1115 | { |
| 1116 | rinfo = rn->info; |
| 1117 | |
| 1118 | if (rinfo->type == ZEBRA_ROUTE_RIP |
| 1119 | && rinfo->sub_type == RIP_ROUTE_RTE) |
| 1120 | { |
| 1121 | if (IS_RIP_DEBUG_EVENT) |
| 1122 | zlog_info ("Next hop %s is on RIP network. Set nexthop to the packet's originator", inet_ntoa (rte->nexthop)); |
| 1123 | rte->nexthop = rinfo->from; |
| 1124 | } |
| 1125 | else |
| 1126 | { |
| 1127 | if (IS_RIP_DEBUG_EVENT) |
| 1128 | zlog_info ("Next hop %s is not directly reachable. Treat it as 0.0.0.0", inet_ntoa (rte->nexthop)); |
| 1129 | rte->nexthop.s_addr = 0; |
| 1130 | } |
| 1131 | |
| 1132 | route_unlock_node (rn); |
| 1133 | } |
| 1134 | else |
| 1135 | { |
| 1136 | if (IS_RIP_DEBUG_EVENT) |
| 1137 | zlog_info ("Next hop %s is not directly reachable. Treat it as 0.0.0.0", inet_ntoa (rte->nexthop)); |
| 1138 | rte->nexthop.s_addr = 0; |
| 1139 | } |
| 1140 | |
| 1141 | } |
| 1142 | } |
| 1143 | |
| 1144 | /* For RIPv1, there won't be a valid netmask. |
| 1145 | |
| 1146 | This is a best guess at the masks. If everyone was using old |
| 1147 | Ciscos before the 'ip subnet zero' option, it would be almost |
| 1148 | right too :-) |
| 1149 | |
| 1150 | Cisco summarize ripv1 advertisments to the classful boundary |
| 1151 | (/16 for class B's) except when the RIP packet does to inside |
| 1152 | the classful network in question. */ |
| 1153 | |
| 1154 | if ((packet->version == RIPv1 && rte->prefix.s_addr != 0) |
| 1155 | || (packet->version == RIPv2 |
| 1156 | && (rte->prefix.s_addr != 0 && rte->mask.s_addr == 0))) |
| 1157 | { |
| 1158 | u_int32_t destination; |
| 1159 | |
paul | 727d104 | 2002-12-13 20:50:29 +0000 | [diff] [blame] | 1160 | if (subnetted == -1) |
| 1161 | { |
| 1162 | c = connected_lookup_address (ifp, from->sin_addr); |
| 1163 | if (c != NULL) |
| 1164 | { |
| 1165 | memcpy (&ifaddr, c->address, sizeof (struct prefix_ipv4)); |
| 1166 | memcpy (&ifaddrclass, &ifaddr, sizeof (struct prefix_ipv4)); |
| 1167 | apply_classful_mask_ipv4 (&ifaddrclass); |
| 1168 | subnetted = 0; |
| 1169 | if (ifaddr.prefixlen > ifaddrclass.prefixlen) |
| 1170 | subnetted = 1; |
| 1171 | } |
| 1172 | } |
| 1173 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1174 | destination = ntohl (rte->prefix.s_addr); |
| 1175 | |
paul | 727d104 | 2002-12-13 20:50:29 +0000 | [diff] [blame] | 1176 | if (IN_CLASSA (destination)) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1177 | masklen2ip (8, &rte->mask); |
paul | 727d104 | 2002-12-13 20:50:29 +0000 | [diff] [blame] | 1178 | else if (IN_CLASSB (destination)) |
| 1179 | masklen2ip (16, &rte->mask); |
| 1180 | else if (IN_CLASSC (destination)) |
| 1181 | masklen2ip (24, &rte->mask); |
| 1182 | |
| 1183 | if (subnetted == 1) |
| 1184 | masklen2ip (ifaddrclass.prefixlen, |
| 1185 | (struct in_addr *) &destination); |
| 1186 | if ((subnetted == 1) && ((rte->prefix.s_addr & destination) == |
| 1187 | ifaddrclass.prefix.s_addr)) |
| 1188 | { |
| 1189 | masklen2ip (ifaddr.prefixlen, &rte->mask); |
| 1190 | if ((rte->prefix.s_addr & rte->mask.s_addr) != rte->prefix.s_addr) |
| 1191 | masklen2ip (32, &rte->mask); |
| 1192 | if (IS_RIP_DEBUG_EVENT) |
| 1193 | zlog_info ("Subnetted route %s", inet_ntoa (rte->prefix)); |
| 1194 | } |
| 1195 | else |
| 1196 | { |
| 1197 | if ((rte->prefix.s_addr & rte->mask.s_addr) != rte->prefix.s_addr) |
| 1198 | continue; |
| 1199 | } |
| 1200 | |
| 1201 | if (IS_RIP_DEBUG_EVENT) |
| 1202 | { |
| 1203 | zlog_info ("Resultant route %s", inet_ntoa (rte->prefix)); |
| 1204 | zlog_info ("Resultant mask %s", inet_ntoa (rte->mask)); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1205 | } |
| 1206 | } |
| 1207 | |
| 1208 | /* In case of RIPv2, if prefix in RTE is not netmask applied one |
| 1209 | ignore the entry. */ |
| 1210 | if ((packet->version == RIPv2) |
| 1211 | && (rte->mask.s_addr != 0) |
| 1212 | && ((rte->prefix.s_addr & rte->mask.s_addr) != rte->prefix.s_addr)) |
| 1213 | { |
| 1214 | zlog_warn ("RIPv2 address %s is not mask /%d applied one", |
| 1215 | inet_ntoa (rte->prefix), ip_masklen (rte->mask)); |
| 1216 | rip_peer_bad_route (from); |
| 1217 | continue; |
| 1218 | } |
| 1219 | |
| 1220 | /* Default route's netmask is ignored. */ |
| 1221 | if (packet->version == RIPv2 |
| 1222 | && (rte->prefix.s_addr == 0) |
| 1223 | && (rte->mask.s_addr != 0)) |
| 1224 | { |
| 1225 | if (IS_RIP_DEBUG_EVENT) |
| 1226 | zlog_info ("Default route with non-zero netmask. Set zero to netmask"); |
| 1227 | rte->mask.s_addr = 0; |
| 1228 | } |
| 1229 | |
| 1230 | /* Routing table updates. */ |
| 1231 | rip_rte_process (rte, from, ifp); |
| 1232 | } |
| 1233 | } |
| 1234 | |
| 1235 | /* RIP packet send to destination address. */ |
| 1236 | int |
| 1237 | rip_send_packet (caddr_t buf, int size, struct sockaddr_in *to, |
| 1238 | struct interface *ifp) |
| 1239 | { |
| 1240 | int ret; |
| 1241 | struct sockaddr_in sin; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1242 | |
| 1243 | /* Make destination address. */ |
| 1244 | memset (&sin, 0, sizeof (struct sockaddr_in)); |
| 1245 | sin.sin_family = AF_INET; |
| 1246 | #ifdef HAVE_SIN_LEN |
| 1247 | sin.sin_len = sizeof (struct sockaddr_in); |
| 1248 | #endif /* HAVE_SIN_LEN */ |
| 1249 | |
| 1250 | /* When destination is specified, use it's port and address. */ |
| 1251 | if (to) |
| 1252 | { |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1253 | sin.sin_port = to->sin_port; |
| 1254 | sin.sin_addr = to->sin_addr; |
| 1255 | } |
| 1256 | else |
| 1257 | { |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1258 | |
| 1259 | sin.sin_port = htons (RIP_PORT_DEFAULT); |
| 1260 | sin.sin_addr.s_addr = htonl (INADDR_RIP_GROUP); |
| 1261 | |
paul | cc1131a | 2003-10-15 23:20:17 +0000 | [diff] [blame] | 1262 | /* caller has set multicast interface */ |
| 1263 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1264 | } |
| 1265 | |
paul | cc1131a | 2003-10-15 23:20:17 +0000 | [diff] [blame] | 1266 | ret = sendto (rip->sock, buf, size, 0, (struct sockaddr *)&sin, |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1267 | sizeof (struct sockaddr_in)); |
| 1268 | |
| 1269 | if (IS_RIP_DEBUG_EVENT) |
paul | cc1131a | 2003-10-15 23:20:17 +0000 | [diff] [blame] | 1270 | zlog_info ("SEND to %s.%d", inet_ntoa(sin.sin_addr), |
| 1271 | ntohs (sin.sin_port)); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1272 | |
| 1273 | if (ret < 0) |
| 1274 | zlog_warn ("can't send packet : %s", strerror (errno)); |
| 1275 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1276 | return ret; |
| 1277 | } |
| 1278 | |
| 1279 | /* Add redistributed route to RIP table. */ |
| 1280 | void |
| 1281 | rip_redistribute_add (int type, int sub_type, struct prefix_ipv4 *p, |
| 1282 | unsigned int ifindex, struct in_addr *nexthop) |
| 1283 | { |
| 1284 | int ret; |
| 1285 | struct route_node *rp; |
| 1286 | struct rip_info *rinfo; |
| 1287 | |
| 1288 | /* Redistribute route */ |
| 1289 | ret = rip_destination_check (p->prefix); |
| 1290 | if (! ret) |
| 1291 | return; |
| 1292 | |
| 1293 | rp = route_node_get (rip->table, (struct prefix *) p); |
| 1294 | |
| 1295 | rinfo = rp->info; |
| 1296 | |
| 1297 | if (rinfo) |
| 1298 | { |
| 1299 | if (rinfo->type == ZEBRA_ROUTE_CONNECT |
| 1300 | && rinfo->sub_type == RIP_ROUTE_INTERFACE |
| 1301 | && rinfo->metric != RIP_METRIC_INFINITY) |
| 1302 | { |
| 1303 | route_unlock_node (rp); |
| 1304 | return; |
| 1305 | } |
| 1306 | |
| 1307 | /* Manually configured RIP route check. */ |
| 1308 | if (rinfo->type == ZEBRA_ROUTE_RIP |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 1309 | && ((rinfo->sub_type == RIP_ROUTE_STATIC) || |
| 1310 | (rinfo->sub_type == RIP_ROUTE_DEFAULT)) ) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1311 | { |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 1312 | if (type != ZEBRA_ROUTE_RIP || ((sub_type != RIP_ROUTE_STATIC) && |
| 1313 | (sub_type != RIP_ROUTE_DEFAULT))) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1314 | { |
| 1315 | route_unlock_node (rp); |
| 1316 | return; |
| 1317 | } |
| 1318 | } |
| 1319 | |
| 1320 | RIP_TIMER_OFF (rinfo->t_timeout); |
| 1321 | RIP_TIMER_OFF (rinfo->t_garbage_collect); |
| 1322 | |
| 1323 | if (rip_route_rte (rinfo)) |
| 1324 | rip_zebra_ipv4_delete ((struct prefix_ipv4 *)&rp->p, &rinfo->nexthop, |
| 1325 | rinfo->metric); |
| 1326 | rp->info = NULL; |
| 1327 | rip_info_free (rinfo); |
| 1328 | |
| 1329 | route_unlock_node (rp); |
| 1330 | } |
| 1331 | |
| 1332 | rinfo = rip_info_new (); |
| 1333 | |
| 1334 | rinfo->type = type; |
| 1335 | rinfo->sub_type = sub_type; |
| 1336 | rinfo->ifindex = ifindex; |
| 1337 | rinfo->metric = 1; |
| 1338 | rinfo->rp = rp; |
| 1339 | |
| 1340 | if (nexthop) |
| 1341 | rinfo->nexthop = *nexthop; |
| 1342 | |
| 1343 | rinfo->flags |= RIP_RTF_FIB; |
| 1344 | rp->info = rinfo; |
| 1345 | |
| 1346 | rinfo->flags |= RIP_RTF_CHANGED; |
| 1347 | |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 1348 | if (IS_RIP_DEBUG_EVENT) { |
| 1349 | if (!nexthop) |
| 1350 | zlog_info ("Redistribute new prefix %s/%d on the interface %s", |
| 1351 | inet_ntoa(p->prefix), p->prefixlen, |
| 1352 | ifindex2ifname(ifindex)); |
| 1353 | else |
| 1354 | zlog_info ("Redistribute new prefix %s/%d with nexthop %s on the interface %s", |
| 1355 | inet_ntoa(p->prefix), p->prefixlen, inet_ntoa(rinfo->nexthop), |
| 1356 | ifindex2ifname(ifindex)); |
| 1357 | } |
| 1358 | |
| 1359 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1360 | rip_event (RIP_TRIGGERED_UPDATE, 0); |
| 1361 | } |
| 1362 | |
| 1363 | /* Delete redistributed route from RIP table. */ |
| 1364 | void |
| 1365 | rip_redistribute_delete (int type, int sub_type, struct prefix_ipv4 *p, |
| 1366 | unsigned int ifindex) |
| 1367 | { |
| 1368 | int ret; |
| 1369 | struct route_node *rp; |
| 1370 | struct rip_info *rinfo; |
| 1371 | |
| 1372 | ret = rip_destination_check (p->prefix); |
| 1373 | if (! ret) |
| 1374 | return; |
| 1375 | |
| 1376 | rp = route_node_lookup (rip->table, (struct prefix *) p); |
| 1377 | if (rp) |
| 1378 | { |
| 1379 | rinfo = rp->info; |
| 1380 | |
| 1381 | if (rinfo != NULL |
| 1382 | && rinfo->type == type |
| 1383 | && rinfo->sub_type == sub_type |
| 1384 | && rinfo->ifindex == ifindex) |
| 1385 | { |
| 1386 | /* Perform poisoned reverse. */ |
| 1387 | rinfo->metric = RIP_METRIC_INFINITY; |
| 1388 | RIP_TIMER_ON (rinfo->t_garbage_collect, |
| 1389 | rip_garbage_collect, rip->garbage_time); |
| 1390 | RIP_TIMER_OFF (rinfo->t_timeout); |
| 1391 | rinfo->flags |= RIP_RTF_CHANGED; |
| 1392 | |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 1393 | if (IS_RIP_DEBUG_EVENT) |
| 1394 | zlog_info ("Poisone %s/%d on the interface %s with an infinity metric [delete]", |
| 1395 | inet_ntoa(p->prefix), p->prefixlen, |
| 1396 | ifindex2ifname(ifindex)); |
| 1397 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1398 | rip_event (RIP_TRIGGERED_UPDATE, 0); |
| 1399 | } |
| 1400 | } |
| 1401 | } |
| 1402 | |
| 1403 | /* Response to request called from rip_read ().*/ |
| 1404 | void |
| 1405 | rip_request_process (struct rip_packet *packet, int size, |
| 1406 | struct sockaddr_in *from, struct interface *ifp) |
| 1407 | { |
| 1408 | caddr_t lim; |
| 1409 | struct rte *rte; |
| 1410 | struct prefix_ipv4 p; |
| 1411 | struct route_node *rp; |
| 1412 | struct rip_info *rinfo; |
| 1413 | struct rip_interface *ri; |
| 1414 | |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 1415 | /* Does not reponse to the requests on the loopback interfaces */ |
| 1416 | if (if_is_loopback (ifp)) |
| 1417 | return; |
| 1418 | |
| 1419 | /* Check RIPng process is enabled on this interface. */ |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1420 | ri = ifp->info; |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 1421 | if (! ri->running) |
| 1422 | return; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1423 | |
| 1424 | /* When passive interface is specified, suppress responses */ |
| 1425 | if (ri->passive) |
| 1426 | return; |
| 1427 | |
| 1428 | /* RIP peer update. */ |
| 1429 | rip_peer_update (from, packet->version); |
| 1430 | |
| 1431 | lim = ((caddr_t) packet) + size; |
| 1432 | rte = packet->rte; |
| 1433 | |
| 1434 | /* The Request is processed entry by entry. If there are no |
| 1435 | entries, no response is given. */ |
| 1436 | if (lim == (caddr_t) rte) |
| 1437 | return; |
| 1438 | |
| 1439 | /* There is one special case. If there is exactly one entry in the |
| 1440 | request, and it has an address family identifier of zero and a |
| 1441 | metric of infinity (i.e., 16), then this is a request to send the |
| 1442 | entire routing table. */ |
| 1443 | if (lim == ((caddr_t) (rte + 1)) && |
| 1444 | ntohs (rte->family) == 0 && |
| 1445 | ntohl (rte->metric) == RIP_METRIC_INFINITY) |
| 1446 | { |
paul | cc1131a | 2003-10-15 23:20:17 +0000 | [diff] [blame] | 1447 | struct prefix_ipv4 saddr; |
| 1448 | |
| 1449 | /* saddr will be used for determining which routes to split-horizon. |
| 1450 | Since the source address we'll pick will be on the same subnet as the |
| 1451 | destination, for the purpose of split-horizoning, we'll |
| 1452 | pretend that "from" is our source address. */ |
| 1453 | saddr.family = AF_INET; |
| 1454 | saddr.prefixlen = IPV4_MAX_BITLEN; |
| 1455 | saddr.prefix = from->sin_addr; |
| 1456 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1457 | /* All route with split horizon */ |
paul | cc1131a | 2003-10-15 23:20:17 +0000 | [diff] [blame] | 1458 | rip_output_process (ifp, NULL, from, rip_all_route, packet->version, |
| 1459 | &saddr); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1460 | } |
| 1461 | else |
| 1462 | { |
| 1463 | /* Examine the list of RTEs in the Request one by one. For each |
| 1464 | entry, look up the destination in the router's routing |
| 1465 | database and, if there is a route, put that route's metric in |
| 1466 | the metric field of the RTE. If there is no explicit route |
| 1467 | to the specified destination, put infinity in the metric |
| 1468 | field. Once all the entries have been filled in, change the |
| 1469 | command from Request to Response and send the datagram back |
| 1470 | to the requestor. */ |
| 1471 | p.family = AF_INET; |
| 1472 | |
| 1473 | for (; ((caddr_t) rte) < lim; rte++) |
| 1474 | { |
| 1475 | p.prefix = rte->prefix; |
| 1476 | p.prefixlen = ip_masklen (rte->mask); |
| 1477 | apply_mask_ipv4 (&p); |
| 1478 | |
| 1479 | rp = route_node_lookup (rip->table, (struct prefix *) &p); |
| 1480 | if (rp) |
| 1481 | { |
| 1482 | rinfo = rp->info; |
| 1483 | rte->metric = htonl (rinfo->metric); |
| 1484 | route_unlock_node (rp); |
| 1485 | } |
| 1486 | else |
| 1487 | rte->metric = htonl (RIP_METRIC_INFINITY); |
| 1488 | } |
| 1489 | packet->command = RIP_RESPONSE; |
| 1490 | |
| 1491 | rip_send_packet ((caddr_t) packet, size, from, ifp); |
| 1492 | } |
| 1493 | rip_global_queries++; |
| 1494 | } |
| 1495 | |
| 1496 | #if RIP_RECVMSG |
| 1497 | /* Set IPv6 packet info to the socket. */ |
| 1498 | static int |
| 1499 | setsockopt_pktinfo (int sock) |
| 1500 | { |
| 1501 | int ret; |
| 1502 | int val = 1; |
| 1503 | |
| 1504 | ret = setsockopt(sock, IPPROTO_IP, IP_PKTINFO, &val, sizeof(val)); |
| 1505 | if (ret < 0) |
| 1506 | zlog_warn ("Can't setsockopt IP_PKTINFO : %s", strerror (errno)); |
| 1507 | return ret; |
| 1508 | } |
| 1509 | |
| 1510 | /* Read RIP packet by recvmsg function. */ |
| 1511 | int |
| 1512 | rip_recvmsg (int sock, u_char *buf, int size, struct sockaddr_in *from, |
| 1513 | int *ifindex) |
| 1514 | { |
| 1515 | int ret; |
| 1516 | struct msghdr msg; |
| 1517 | struct iovec iov; |
| 1518 | struct cmsghdr *ptr; |
| 1519 | char adata[1024]; |
| 1520 | |
| 1521 | msg.msg_name = (void *) from; |
| 1522 | msg.msg_namelen = sizeof (struct sockaddr_in); |
| 1523 | msg.msg_iov = &iov; |
| 1524 | msg.msg_iovlen = 1; |
| 1525 | msg.msg_control = (void *) adata; |
| 1526 | msg.msg_controllen = sizeof adata; |
| 1527 | iov.iov_base = buf; |
| 1528 | iov.iov_len = size; |
| 1529 | |
| 1530 | ret = recvmsg (sock, &msg, 0); |
| 1531 | if (ret < 0) |
| 1532 | return ret; |
| 1533 | |
| 1534 | for (ptr = CMSG_FIRSTHDR(&msg); ptr != NULL; ptr = CMSG_NXTHDR(&msg, ptr)) |
| 1535 | if (ptr->cmsg_level == IPPROTO_IP && ptr->cmsg_type == IP_PKTINFO) |
| 1536 | { |
| 1537 | struct in_pktinfo *pktinfo; |
| 1538 | int i; |
| 1539 | |
| 1540 | pktinfo = (struct in_pktinfo *) CMSG_DATA (ptr); |
| 1541 | i = pktinfo->ipi_ifindex; |
| 1542 | } |
| 1543 | return ret; |
| 1544 | } |
| 1545 | |
| 1546 | /* RIP packet read function. */ |
| 1547 | int |
| 1548 | rip_read_new (struct thread *t) |
| 1549 | { |
| 1550 | int ret; |
| 1551 | int sock; |
| 1552 | char buf[RIP_PACKET_MAXSIZ]; |
| 1553 | struct sockaddr_in from; |
| 1554 | unsigned int ifindex; |
| 1555 | |
| 1556 | /* Fetch socket then register myself. */ |
| 1557 | sock = THREAD_FD (t); |
| 1558 | rip_event (RIP_READ, sock); |
| 1559 | |
| 1560 | /* Read RIP packet. */ |
| 1561 | ret = rip_recvmsg (sock, buf, RIP_PACKET_MAXSIZ, &from, (int *)&ifindex); |
| 1562 | if (ret < 0) |
| 1563 | { |
| 1564 | zlog_warn ("Can't read RIP packet: %s", strerror (errno)); |
| 1565 | return ret; |
| 1566 | } |
| 1567 | |
| 1568 | return ret; |
| 1569 | } |
| 1570 | #endif /* RIP_RECVMSG */ |
| 1571 | |
| 1572 | /* First entry point of RIP packet. */ |
| 1573 | int |
| 1574 | rip_read (struct thread *t) |
| 1575 | { |
| 1576 | int sock; |
| 1577 | int ret; |
| 1578 | int rtenum; |
| 1579 | union rip_buf rip_buf; |
| 1580 | struct rip_packet *packet; |
| 1581 | struct sockaddr_in from; |
| 1582 | int fromlen, len; |
| 1583 | struct interface *ifp; |
| 1584 | struct rip_interface *ri; |
| 1585 | |
| 1586 | /* Fetch socket then register myself. */ |
| 1587 | sock = THREAD_FD (t); |
| 1588 | rip->t_read = NULL; |
| 1589 | |
| 1590 | /* Add myself to tne next event */ |
| 1591 | rip_event (RIP_READ, sock); |
| 1592 | |
| 1593 | /* RIPd manages only IPv4. */ |
| 1594 | memset (&from, 0, sizeof (struct sockaddr_in)); |
| 1595 | fromlen = sizeof (struct sockaddr_in); |
| 1596 | |
| 1597 | len = recvfrom (sock, (char *)&rip_buf.buf, sizeof (rip_buf.buf), 0, |
| 1598 | (struct sockaddr *) &from, &fromlen); |
| 1599 | if (len < 0) |
| 1600 | { |
| 1601 | zlog_info ("recvfrom failed: %s", strerror (errno)); |
| 1602 | return len; |
| 1603 | } |
| 1604 | |
| 1605 | /* Check is this packet comming from myself? */ |
paul | 31a476c | 2003-09-29 19:54:53 +0000 | [diff] [blame] | 1606 | if (if_check_address (from.sin_addr)) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1607 | { |
| 1608 | if (IS_RIP_DEBUG_PACKET) |
| 1609 | zlog_warn ("ignore packet comes from myself"); |
| 1610 | return -1; |
| 1611 | } |
| 1612 | |
| 1613 | /* Which interface is this packet comes from. */ |
| 1614 | ifp = if_lookup_address (from.sin_addr); |
| 1615 | |
| 1616 | /* RIP packet received */ |
| 1617 | if (IS_RIP_DEBUG_EVENT) |
| 1618 | zlog_info ("RECV packet from %s port %d on %s", |
| 1619 | inet_ntoa (from.sin_addr), ntohs (from.sin_port), |
| 1620 | ifp ? ifp->name : "unknown"); |
| 1621 | |
| 1622 | /* If this packet come from unknown interface, ignore it. */ |
| 1623 | if (ifp == NULL) |
| 1624 | { |
| 1625 | zlog_info ("packet comes from unknown interface"); |
| 1626 | return -1; |
| 1627 | } |
| 1628 | |
| 1629 | /* Packet length check. */ |
| 1630 | if (len < RIP_PACKET_MINSIZ) |
| 1631 | { |
| 1632 | zlog_warn ("packet size %d is smaller than minimum size %d", |
| 1633 | len, RIP_PACKET_MINSIZ); |
| 1634 | rip_peer_bad_packet (&from); |
| 1635 | return len; |
| 1636 | } |
| 1637 | if (len > RIP_PACKET_MAXSIZ) |
| 1638 | { |
| 1639 | zlog_warn ("packet size %d is larger than max size %d", |
| 1640 | len, RIP_PACKET_MAXSIZ); |
| 1641 | rip_peer_bad_packet (&from); |
| 1642 | return len; |
| 1643 | } |
| 1644 | |
| 1645 | /* Packet alignment check. */ |
| 1646 | if ((len - RIP_PACKET_MINSIZ) % 20) |
| 1647 | { |
| 1648 | zlog_warn ("packet size %d is wrong for RIP packet alignment", len); |
| 1649 | rip_peer_bad_packet (&from); |
| 1650 | return len; |
| 1651 | } |
| 1652 | |
| 1653 | /* Set RTE number. */ |
| 1654 | rtenum = ((len - RIP_PACKET_MINSIZ) / 20); |
| 1655 | |
| 1656 | /* For easy to handle. */ |
| 1657 | packet = &rip_buf.rip_packet; |
| 1658 | |
| 1659 | /* RIP version check. */ |
| 1660 | if (packet->version == 0) |
| 1661 | { |
| 1662 | zlog_info ("version 0 with command %d received.", packet->command); |
| 1663 | rip_peer_bad_packet (&from); |
| 1664 | return -1; |
| 1665 | } |
| 1666 | |
| 1667 | /* Dump RIP packet. */ |
| 1668 | if (IS_RIP_DEBUG_RECV) |
| 1669 | rip_packet_dump (packet, len, "RECV"); |
| 1670 | |
| 1671 | /* RIP version adjust. This code should rethink now. RFC1058 says |
| 1672 | that "Version 1 implementations are to ignore this extra data and |
| 1673 | process only the fields specified in this document.". So RIPv3 |
| 1674 | packet should be treated as RIPv1 ignoring must be zero field. */ |
| 1675 | if (packet->version > RIPv2) |
| 1676 | packet->version = RIPv2; |
| 1677 | |
| 1678 | /* Is RIP running or is this RIP neighbor ?*/ |
| 1679 | ri = ifp->info; |
| 1680 | if (! ri->running && ! rip_neighbor_lookup (&from)) |
| 1681 | { |
| 1682 | if (IS_RIP_DEBUG_EVENT) |
| 1683 | zlog_info ("RIP is not enabled on interface %s.", ifp->name); |
| 1684 | rip_peer_bad_packet (&from); |
| 1685 | return -1; |
| 1686 | } |
| 1687 | |
| 1688 | /* RIP Version check. */ |
| 1689 | if (packet->command == RIP_RESPONSE) |
| 1690 | { |
paul | f38a471 | 2003-06-07 01:10:00 +0000 | [diff] [blame] | 1691 | int vrecv = ((ri->ri_receive == RI_RIP_UNSPEC) ? |
| 1692 | rip->version_recv : ri->ri_receive); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1693 | if (packet->version == RIPv1) |
paul | f38a471 | 2003-06-07 01:10:00 +0000 | [diff] [blame] | 1694 | if (! (vrecv & RIPv1)) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1695 | { |
| 1696 | if (IS_RIP_DEBUG_PACKET) |
| 1697 | zlog_warn (" packet's v%d doesn't fit to if version spec", |
| 1698 | packet->version); |
| 1699 | rip_peer_bad_packet (&from); |
| 1700 | return -1; |
| 1701 | } |
| 1702 | if (packet->version == RIPv2) |
paul | f38a471 | 2003-06-07 01:10:00 +0000 | [diff] [blame] | 1703 | if (! (vrecv & RIPv2)) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1704 | { |
| 1705 | if (IS_RIP_DEBUG_PACKET) |
| 1706 | zlog_warn (" packet's v%d doesn't fit to if version spec", |
| 1707 | packet->version); |
| 1708 | rip_peer_bad_packet (&from); |
| 1709 | return -1; |
| 1710 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1711 | } |
| 1712 | |
| 1713 | /* RFC2453 5.2 If the router is not configured to authenticate RIP-2 |
| 1714 | messages, then RIP-1 and unauthenticated RIP-2 messages will be |
| 1715 | accepted; authenticated RIP-2 messages shall be discarded. */ |
| 1716 | |
| 1717 | if ((ri->auth_type == RIP_NO_AUTH) |
| 1718 | && rtenum |
| 1719 | && (packet->version == RIPv2) && (packet->rte->family == 0xffff)) |
| 1720 | { |
| 1721 | if (IS_RIP_DEBUG_EVENT) |
| 1722 | zlog_warn ("packet RIPv%d is dropped because authentication disabled", |
| 1723 | packet->version); |
| 1724 | rip_peer_bad_packet (&from); |
| 1725 | return -1; |
| 1726 | } |
| 1727 | |
| 1728 | /* If the router is configured to authenticate RIP-2 messages, then |
| 1729 | RIP-1 messages and RIP-2 messages which pass authentication |
| 1730 | testing shall be accepted; unauthenticated and failed |
| 1731 | authentication RIP-2 messages shall be discarded. For maximum |
| 1732 | security, RIP-1 messages should be ignored when authentication is |
| 1733 | in use (see section 4.1); otherwise, the routing information from |
| 1734 | authenticated messages will be propagated by RIP-1 routers in an |
| 1735 | unauthenticated manner. */ |
| 1736 | |
| 1737 | if ((ri->auth_type == RIP_AUTH_SIMPLE_PASSWORD |
| 1738 | || ri->auth_type == RIP_AUTH_MD5) |
| 1739 | && rtenum) |
| 1740 | { |
| 1741 | /* We follow maximum security. */ |
| 1742 | if (packet->version == RIPv1 && packet->rte->family == 0xffff) |
| 1743 | { |
| 1744 | if (IS_RIP_DEBUG_PACKET) |
| 1745 | zlog_warn ("packet RIPv%d is dropped because authentication enabled", packet->version); |
| 1746 | rip_peer_bad_packet (&from); |
| 1747 | return -1; |
| 1748 | } |
| 1749 | |
| 1750 | /* Check RIPv2 authentication. */ |
| 1751 | if (packet->version == RIPv2) |
| 1752 | { |
| 1753 | if (packet->rte->family == 0xffff) |
| 1754 | { |
| 1755 | if (ntohs (packet->rte->tag) == RIP_AUTH_SIMPLE_PASSWORD) |
| 1756 | { |
| 1757 | ret = rip_auth_simple_password (packet->rte, &from, ifp); |
| 1758 | if (! ret) |
| 1759 | { |
| 1760 | if (IS_RIP_DEBUG_EVENT) |
| 1761 | zlog_warn ("RIPv2 simple password authentication failed"); |
| 1762 | rip_peer_bad_packet (&from); |
| 1763 | return -1; |
| 1764 | } |
| 1765 | else |
| 1766 | { |
| 1767 | if (IS_RIP_DEBUG_EVENT) |
| 1768 | zlog_info ("RIPv2 simple password authentication success"); |
| 1769 | } |
| 1770 | } |
| 1771 | else if (ntohs (packet->rte->tag) == RIP_AUTH_MD5) |
| 1772 | { |
| 1773 | ret = rip_auth_md5 (packet, &from, ifp); |
| 1774 | if (! ret) |
| 1775 | { |
| 1776 | if (IS_RIP_DEBUG_EVENT) |
| 1777 | zlog_warn ("RIPv2 MD5 authentication failed"); |
| 1778 | rip_peer_bad_packet (&from); |
| 1779 | return -1; |
| 1780 | } |
| 1781 | else |
| 1782 | { |
| 1783 | if (IS_RIP_DEBUG_EVENT) |
| 1784 | zlog_info ("RIPv2 MD5 authentication success"); |
| 1785 | } |
| 1786 | /* Reset RIP packet length to trim MD5 data. */ |
| 1787 | len = ret; |
| 1788 | } |
| 1789 | else |
| 1790 | { |
| 1791 | if (IS_RIP_DEBUG_EVENT) |
| 1792 | zlog_warn ("Unknown authentication type %d", |
| 1793 | ntohs (packet->rte->tag)); |
| 1794 | rip_peer_bad_packet (&from); |
| 1795 | return -1; |
| 1796 | } |
| 1797 | } |
| 1798 | else |
| 1799 | { |
| 1800 | /* There is no authentication in the packet. */ |
| 1801 | if (ri->auth_str || ri->key_chain) |
| 1802 | { |
| 1803 | if (IS_RIP_DEBUG_EVENT) |
| 1804 | zlog_warn ("RIPv2 authentication failed: no authentication in packet"); |
| 1805 | rip_peer_bad_packet (&from); |
| 1806 | return -1; |
| 1807 | } |
| 1808 | } |
| 1809 | } |
| 1810 | } |
| 1811 | |
| 1812 | /* Process each command. */ |
| 1813 | switch (packet->command) |
| 1814 | { |
| 1815 | case RIP_RESPONSE: |
| 1816 | rip_response_process (packet, len, &from, ifp); |
| 1817 | break; |
| 1818 | case RIP_REQUEST: |
| 1819 | case RIP_POLL: |
| 1820 | rip_request_process (packet, len, &from, ifp); |
| 1821 | break; |
| 1822 | case RIP_TRACEON: |
| 1823 | case RIP_TRACEOFF: |
| 1824 | zlog_info ("Obsolete command %s received, please sent it to routed", |
| 1825 | lookup (rip_msg, packet->command)); |
| 1826 | rip_peer_bad_packet (&from); |
| 1827 | break; |
| 1828 | case RIP_POLL_ENTRY: |
| 1829 | zlog_info ("Obsolete command %s received", |
| 1830 | lookup (rip_msg, packet->command)); |
| 1831 | rip_peer_bad_packet (&from); |
| 1832 | break; |
| 1833 | default: |
| 1834 | zlog_info ("Unknown RIP command %d received", packet->command); |
| 1835 | rip_peer_bad_packet (&from); |
| 1836 | break; |
| 1837 | } |
| 1838 | |
| 1839 | return len; |
| 1840 | } |
| 1841 | |
| 1842 | /* Make socket for RIP protocol. */ |
| 1843 | int |
| 1844 | rip_create_socket () |
| 1845 | { |
| 1846 | int ret; |
| 1847 | int sock; |
| 1848 | struct sockaddr_in addr; |
| 1849 | struct servent *sp; |
| 1850 | |
| 1851 | memset (&addr, 0, sizeof (struct sockaddr_in)); |
| 1852 | |
| 1853 | /* Set RIP port. */ |
| 1854 | sp = getservbyname ("router", "udp"); |
| 1855 | if (sp) |
| 1856 | addr.sin_port = sp->s_port; |
| 1857 | else |
| 1858 | addr.sin_port = htons (RIP_PORT_DEFAULT); |
| 1859 | |
| 1860 | /* Address shoud be any address. */ |
| 1861 | addr.sin_family = AF_INET; |
| 1862 | addr.sin_addr.s_addr = INADDR_ANY; |
| 1863 | |
| 1864 | /* Make datagram socket. */ |
| 1865 | sock = socket (AF_INET, SOCK_DGRAM, 0); |
| 1866 | if (sock < 0) |
| 1867 | { |
| 1868 | perror ("socket"); |
| 1869 | exit (1); |
| 1870 | } |
| 1871 | |
| 1872 | sockopt_broadcast (sock); |
| 1873 | sockopt_reuseaddr (sock); |
| 1874 | sockopt_reuseport (sock); |
| 1875 | #ifdef RIP_RECVMSG |
| 1876 | setsockopt_pktinfo (sock); |
| 1877 | #endif /* RIP_RECVMSG */ |
| 1878 | |
paul | edd7c24 | 2003-06-04 13:59:38 +0000 | [diff] [blame] | 1879 | if (ripd_privs.change (ZPRIVS_RAISE)) |
| 1880 | zlog_err ("rip_create_socket: could not raise privs"); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1881 | ret = bind (sock, (struct sockaddr *) & addr, sizeof (addr)); |
| 1882 | if (ret < 0) |
| 1883 | { |
| 1884 | perror ("bind"); |
| 1885 | return ret; |
| 1886 | } |
paul | edd7c24 | 2003-06-04 13:59:38 +0000 | [diff] [blame] | 1887 | if (ripd_privs.change (ZPRIVS_LOWER)) |
| 1888 | zlog_err ("rip_create_socket: could not lower privs"); |
| 1889 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1890 | return sock; |
| 1891 | } |
| 1892 | |
| 1893 | /* Write routing table entry to the stream and return next index of |
| 1894 | the routing table entry in the stream. */ |
| 1895 | int |
| 1896 | rip_write_rte (int num, struct stream *s, struct prefix_ipv4 *p, |
| 1897 | u_char version, struct rip_info *rinfo, struct interface *ifp) |
| 1898 | { |
| 1899 | struct in_addr mask; |
| 1900 | struct rip_interface *ri; |
| 1901 | |
| 1902 | /* RIP packet header. */ |
| 1903 | if (num == 0) |
| 1904 | { |
| 1905 | stream_putc (s, RIP_RESPONSE); |
| 1906 | stream_putc (s, version); |
| 1907 | stream_putw (s, 0); |
| 1908 | |
| 1909 | /* In case of we need RIPv2 authentication. */ |
| 1910 | if (version == RIPv2 && ifp) |
| 1911 | { |
| 1912 | ri = ifp->info; |
| 1913 | |
| 1914 | if (ri->auth_type == RIP_AUTH_SIMPLE_PASSWORD) |
| 1915 | { |
| 1916 | if (ri->auth_str) |
| 1917 | { |
| 1918 | stream_putw (s, 0xffff); |
| 1919 | stream_putw (s, RIP_AUTH_SIMPLE_PASSWORD); |
| 1920 | |
| 1921 | memset ((s->data + s->putp), 0, 16); |
| 1922 | strncpy ((s->data + s->putp), ri->auth_str, 16); |
| 1923 | stream_set_putp (s, s->putp + 16); |
| 1924 | |
| 1925 | num++; |
| 1926 | } |
| 1927 | if (ri->key_chain) |
| 1928 | { |
| 1929 | struct keychain *keychain; |
| 1930 | struct key *key; |
| 1931 | |
| 1932 | keychain = keychain_lookup (ri->key_chain); |
| 1933 | |
| 1934 | if (keychain) |
| 1935 | { |
| 1936 | key = key_lookup_for_send (keychain); |
| 1937 | |
| 1938 | if (key) |
| 1939 | { |
| 1940 | stream_putw (s, 0xffff); |
| 1941 | stream_putw (s, RIP_AUTH_SIMPLE_PASSWORD); |
| 1942 | |
| 1943 | memset ((s->data + s->putp), 0, 16); |
| 1944 | strncpy ((s->data + s->putp), key->string, 16); |
| 1945 | stream_set_putp (s, s->putp + 16); |
| 1946 | |
| 1947 | num++; |
| 1948 | } |
| 1949 | } |
| 1950 | } |
| 1951 | } |
| 1952 | } |
| 1953 | } |
| 1954 | |
| 1955 | /* Write routing table entry. */ |
| 1956 | if (version == RIPv1) |
| 1957 | { |
| 1958 | stream_putw (s, AF_INET); |
| 1959 | stream_putw (s, 0); |
| 1960 | stream_put_ipv4 (s, p->prefix.s_addr); |
| 1961 | stream_put_ipv4 (s, 0); |
| 1962 | stream_put_ipv4 (s, 0); |
| 1963 | stream_putl (s, rinfo->metric_out); |
| 1964 | } |
| 1965 | else |
| 1966 | { |
| 1967 | masklen2ip (p->prefixlen, &mask); |
| 1968 | |
| 1969 | stream_putw (s, AF_INET); |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 1970 | stream_putw (s, rinfo->tag_out); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1971 | stream_put_ipv4 (s, p->prefix.s_addr); |
| 1972 | stream_put_ipv4 (s, mask.s_addr); |
| 1973 | stream_put_ipv4 (s, rinfo->nexthop_out.s_addr); |
| 1974 | stream_putl (s, rinfo->metric_out); |
| 1975 | } |
| 1976 | |
| 1977 | return ++num; |
| 1978 | } |
| 1979 | |
| 1980 | /* Send update to the ifp or spcified neighbor. */ |
| 1981 | void |
paul | 727d104 | 2002-12-13 20:50:29 +0000 | [diff] [blame] | 1982 | rip_output_process (struct interface *ifp, struct prefix *ifaddr, |
paul | cc1131a | 2003-10-15 23:20:17 +0000 | [diff] [blame] | 1983 | struct sockaddr_in *to, int route_type, u_char version, |
| 1984 | struct prefix_ipv4 *saddr) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1985 | { |
| 1986 | int ret; |
| 1987 | struct stream *s; |
| 1988 | struct route_node *rp; |
| 1989 | struct rip_info *rinfo; |
| 1990 | struct rip_interface *ri; |
| 1991 | struct prefix_ipv4 *p; |
| 1992 | struct prefix_ipv4 classfull; |
paul | 727d104 | 2002-12-13 20:50:29 +0000 | [diff] [blame] | 1993 | struct prefix_ipv4 ifaddrclass; |
| 1994 | struct connected *c; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1995 | int num; |
| 1996 | int rtemax; |
paul | 01d0908 | 2003-06-08 21:22:18 +0000 | [diff] [blame] | 1997 | int subnetted = 0; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1998 | |
| 1999 | /* Logging output event. */ |
| 2000 | if (IS_RIP_DEBUG_EVENT) |
| 2001 | { |
| 2002 | if (to) |
| 2003 | zlog_info ("update routes to neighbor %s", inet_ntoa (to->sin_addr)); |
| 2004 | else |
| 2005 | zlog_info ("update routes on interface %s ifindex %d", |
| 2006 | ifp->name, ifp->ifindex); |
| 2007 | } |
| 2008 | |
| 2009 | /* Set output stream. */ |
| 2010 | s = rip->obuf; |
| 2011 | |
| 2012 | /* Reset stream and RTE counter. */ |
| 2013 | stream_reset (s); |
| 2014 | num = 0; |
| 2015 | rtemax = (RIP_PACKET_MAXSIZ - 4) / 20; |
| 2016 | |
| 2017 | /* Get RIP interface. */ |
| 2018 | ri = ifp->info; |
| 2019 | |
| 2020 | /* If output interface is in simple password authentication mode, we |
| 2021 | need space for authentication data. */ |
| 2022 | if (ri->auth_type == RIP_AUTH_SIMPLE_PASSWORD) |
| 2023 | rtemax -= 1; |
| 2024 | |
| 2025 | /* If output interface is in MD5 authentication mode, we need space |
| 2026 | for authentication header and data. */ |
| 2027 | if (ri->auth_type == RIP_AUTH_MD5) |
| 2028 | rtemax -= 2; |
| 2029 | |
| 2030 | /* If output interface is in simple password authentication mode |
| 2031 | and string or keychain is specified we need space for auth. data */ |
| 2032 | if (ri->auth_type == RIP_AUTH_SIMPLE_PASSWORD) |
| 2033 | { |
| 2034 | if (ri->key_chain) |
| 2035 | { |
| 2036 | struct keychain *keychain; |
| 2037 | |
| 2038 | keychain = keychain_lookup (ri->key_chain); |
| 2039 | if (keychain) |
| 2040 | if (key_lookup_for_send (keychain)) |
| 2041 | rtemax -=1; |
| 2042 | } |
| 2043 | else |
| 2044 | if (ri->auth_str) |
| 2045 | rtemax -=1; |
| 2046 | } |
| 2047 | |
paul | 727d104 | 2002-12-13 20:50:29 +0000 | [diff] [blame] | 2048 | if (version == RIPv1) |
| 2049 | { |
| 2050 | if (ifaddr == NULL) |
| 2051 | { |
| 2052 | c = connected_lookup_address (ifp, to->sin_addr); |
| 2053 | if (c != NULL) |
| 2054 | ifaddr = c->address; |
| 2055 | } |
| 2056 | if (ifaddr == NULL) |
| 2057 | { |
| 2058 | zlog_warn ("cannot find source address for packets to neighbor %s", |
| 2059 | inet_ntoa (to->sin_addr)); |
| 2060 | return; |
| 2061 | } |
| 2062 | memcpy (&ifaddrclass, ifaddr, sizeof (struct prefix_ipv4)); |
| 2063 | apply_classful_mask_ipv4 (&ifaddrclass); |
| 2064 | subnetted = 0; |
| 2065 | if (ifaddr->prefixlen > ifaddrclass.prefixlen) |
paul | 01d0908 | 2003-06-08 21:22:18 +0000 | [diff] [blame] | 2066 | subnetted = 1; |
paul | 727d104 | 2002-12-13 20:50:29 +0000 | [diff] [blame] | 2067 | } |
| 2068 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 2069 | for (rp = route_top (rip->table); rp; rp = route_next (rp)) |
| 2070 | if ((rinfo = rp->info) != NULL) |
| 2071 | { |
paul | 727d104 | 2002-12-13 20:50:29 +0000 | [diff] [blame] | 2072 | /* For RIPv1, if we are subnetted, output subnets in our network */ |
| 2073 | /* that have the same mask as the output "interface". For other */ |
| 2074 | /* networks, only the classfull version is output. */ |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 2075 | |
| 2076 | if (version == RIPv1) |
| 2077 | { |
paul | 727d104 | 2002-12-13 20:50:29 +0000 | [diff] [blame] | 2078 | p = (struct prefix_ipv4 *) &rp->p; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 2079 | |
| 2080 | if (IS_RIP_DEBUG_PACKET) |
paul | 727d104 | 2002-12-13 20:50:29 +0000 | [diff] [blame] | 2081 | zlog_info("RIPv1 mask check, %s/%d considered for output", |
| 2082 | inet_ntoa (rp->p.u.prefix4), rp->p.prefixlen); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 2083 | |
paul | 727d104 | 2002-12-13 20:50:29 +0000 | [diff] [blame] | 2084 | if (subnetted && |
| 2085 | prefix_match ((struct prefix *) &ifaddrclass, &rp->p)) |
| 2086 | { |
| 2087 | if ((ifaddr->prefixlen != rp->p.prefixlen) && |
| 2088 | (rp->p.prefixlen != 32)) |
| 2089 | continue; |
| 2090 | } |
| 2091 | else |
| 2092 | { |
| 2093 | memcpy (&classfull, &rp->p, sizeof(struct prefix_ipv4)); |
| 2094 | apply_classful_mask_ipv4(&classfull); |
| 2095 | if (rp->p.u.prefix4.s_addr != 0 && |
| 2096 | classfull.prefixlen != rp->p.prefixlen) |
| 2097 | continue; |
| 2098 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 2099 | if (IS_RIP_DEBUG_PACKET) |
paul | 727d104 | 2002-12-13 20:50:29 +0000 | [diff] [blame] | 2100 | zlog_info("RIPv1 mask check, %s/%d made it through", |
| 2101 | inet_ntoa (rp->p.u.prefix4), rp->p.prefixlen); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 2102 | } |
| 2103 | else |
| 2104 | p = (struct prefix_ipv4 *) &rp->p; |
| 2105 | |
| 2106 | /* Apply output filters. */ |
| 2107 | ret = rip_outgoing_filter (p, ri); |
| 2108 | if (ret < 0) |
| 2109 | continue; |
| 2110 | |
| 2111 | /* Changed route only output. */ |
| 2112 | if (route_type == rip_changed_route && |
| 2113 | (! (rinfo->flags & RIP_RTF_CHANGED))) |
| 2114 | continue; |
| 2115 | |
| 2116 | /* Split horizon. */ |
| 2117 | /* if (split_horizon == rip_split_horizon) */ |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 2118 | if (ri->split_horizon == RIP_SPLIT_HORIZON) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 2119 | { |
| 2120 | /* We perform split horizon for RIP and connected route. */ |
| 2121 | if ((rinfo->type == ZEBRA_ROUTE_RIP || |
| 2122 | rinfo->type == ZEBRA_ROUTE_CONNECT) && |
paul | cc1131a | 2003-10-15 23:20:17 +0000 | [diff] [blame] | 2123 | prefix_match((struct prefix *)p, (struct prefix *)saddr)) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 2124 | continue; |
| 2125 | } |
| 2126 | |
| 2127 | /* Preparation for route-map. */ |
| 2128 | rinfo->metric_set = 0; |
| 2129 | rinfo->nexthop_out.s_addr = 0; |
| 2130 | rinfo->metric_out = rinfo->metric; |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 2131 | rinfo->tag_out = rinfo->tag; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 2132 | rinfo->ifindex_out = ifp->ifindex; |
| 2133 | |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 2134 | /* In order to avoid some local loops, |
| 2135 | * if the RIP route has a nexthop via this interface, keep the nexthop, |
| 2136 | * otherwise set it to 0. The nexthop should not be propagated |
| 2137 | * beyond the local broadcast/multicast area in order |
| 2138 | * to avoid an IGP multi-level recursive look-up. |
| 2139 | * see (4.4) |
| 2140 | */ |
| 2141 | if (rinfo->ifindex == ifp->ifindex) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 2142 | rinfo->nexthop_out = rinfo->nexthop; |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 2143 | |
| 2144 | /* Interface route-map */ |
| 2145 | if (ri->routemap[RIP_FILTER_OUT]) |
| 2146 | { |
| 2147 | ret = route_map_apply (ri->routemap[RIP_FILTER_OUT], |
| 2148 | (struct prefix *) p, RMAP_RIP, |
| 2149 | rinfo); |
| 2150 | |
| 2151 | if (ret == RMAP_DENYMATCH) |
| 2152 | { |
| 2153 | if (IS_RIP_DEBUG_PACKET) |
| 2154 | zlog_info ("RIP %s/%d is filtered by route-map out", |
| 2155 | inet_ntoa (p->prefix), p->prefixlen); |
| 2156 | continue; |
| 2157 | } |
| 2158 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 2159 | |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 2160 | /* Apply redistribute route map - continue, if deny */ |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 2161 | if (rip->route_map[rinfo->type].name |
| 2162 | && rinfo->sub_type != RIP_ROUTE_INTERFACE) |
| 2163 | { |
| 2164 | ret = route_map_apply (rip->route_map[rinfo->type].map, |
| 2165 | (struct prefix *)p, RMAP_RIP, rinfo); |
| 2166 | |
| 2167 | if (ret == RMAP_DENYMATCH) |
| 2168 | { |
| 2169 | if (IS_RIP_DEBUG_PACKET) |
| 2170 | zlog_info ("%s/%d is filtered by route-map", |
| 2171 | inet_ntoa (p->prefix), p->prefixlen); |
| 2172 | continue; |
| 2173 | } |
| 2174 | } |
| 2175 | |
| 2176 | /* When route-map does not set metric. */ |
| 2177 | if (! rinfo->metric_set) |
| 2178 | { |
| 2179 | /* If redistribute metric is set. */ |
| 2180 | if (rip->route_map[rinfo->type].metric_config |
| 2181 | && rinfo->metric != RIP_METRIC_INFINITY) |
| 2182 | { |
| 2183 | rinfo->metric_out = rip->route_map[rinfo->type].metric; |
| 2184 | } |
| 2185 | else |
| 2186 | { |
| 2187 | /* If the route is not connected or localy generated |
| 2188 | one, use default-metric value*/ |
| 2189 | if (rinfo->type != ZEBRA_ROUTE_RIP |
| 2190 | && rinfo->type != ZEBRA_ROUTE_CONNECT |
| 2191 | && rinfo->metric != RIP_METRIC_INFINITY) |
| 2192 | rinfo->metric_out = rip->default_metric; |
| 2193 | } |
| 2194 | } |
| 2195 | |
| 2196 | /* Apply offset-list */ |
| 2197 | if (rinfo->metric != RIP_METRIC_INFINITY) |
| 2198 | rip_offset_list_apply_out (p, ifp, &rinfo->metric_out); |
| 2199 | |
| 2200 | if (rinfo->metric_out > RIP_METRIC_INFINITY) |
| 2201 | rinfo->metric_out = RIP_METRIC_INFINITY; |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 2202 | |
| 2203 | /* Perform split-horizon with poisoned reverse |
| 2204 | * for RIP and connected routes. |
| 2205 | **/ |
| 2206 | if (ri->split_horizon == RIP_SPLIT_HORIZON_POISONED_REVERSE) { |
| 2207 | if ((rinfo->type == ZEBRA_ROUTE_RIP || |
| 2208 | rinfo->type == ZEBRA_ROUTE_CONNECT) && |
| 2209 | rinfo->ifindex == ifp->ifindex) |
| 2210 | rinfo->metric_out = RIP_METRIC_INFINITY; |
| 2211 | } |
| 2212 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 2213 | /* Write RTE to the stream. */ |
| 2214 | num = rip_write_rte (num, s, p, version, rinfo, to ? NULL : ifp); |
| 2215 | if (num == rtemax) |
| 2216 | { |
| 2217 | if (version == RIPv2 && ri->auth_type == RIP_AUTH_MD5) |
| 2218 | rip_auth_md5_set (s, ifp); |
| 2219 | |
| 2220 | ret = rip_send_packet (STREAM_DATA (s), stream_get_endp (s), |
| 2221 | to, ifp); |
| 2222 | |
| 2223 | if (ret >= 0 && IS_RIP_DEBUG_SEND) |
| 2224 | rip_packet_dump ((struct rip_packet *)STREAM_DATA (s), |
| 2225 | stream_get_endp(s), "SEND"); |
| 2226 | num = 0; |
| 2227 | stream_reset (s); |
| 2228 | } |
| 2229 | } |
| 2230 | |
| 2231 | /* Flush unwritten RTE. */ |
| 2232 | if (num != 0) |
| 2233 | { |
| 2234 | if (version == RIPv2 && ri->auth_type == RIP_AUTH_MD5) |
| 2235 | rip_auth_md5_set (s, ifp); |
| 2236 | |
| 2237 | ret = rip_send_packet (STREAM_DATA (s), stream_get_endp (s), to, ifp); |
| 2238 | |
| 2239 | if (ret >= 0 && IS_RIP_DEBUG_SEND) |
| 2240 | rip_packet_dump ((struct rip_packet *)STREAM_DATA (s), |
| 2241 | stream_get_endp (s), "SEND"); |
| 2242 | num = 0; |
| 2243 | stream_reset (s); |
| 2244 | } |
| 2245 | |
| 2246 | /* Statistics updates. */ |
| 2247 | ri->sent_updates++; |
| 2248 | } |
| 2249 | |
| 2250 | /* Send RIP packet to the interface. */ |
| 2251 | void |
paul | cc1131a | 2003-10-15 23:20:17 +0000 | [diff] [blame] | 2252 | rip_update_interface (struct interface *ifp, u_char version, int route_type, |
| 2253 | struct prefix_ipv4 *saddr) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 2254 | { |
| 2255 | struct prefix_ipv4 *p; |
| 2256 | struct connected *connected; |
| 2257 | listnode node; |
| 2258 | struct sockaddr_in to; |
| 2259 | |
| 2260 | /* When RIP version is 2 and multicast enable interface. */ |
| 2261 | if (version == RIPv2 && if_is_multicast (ifp)) |
| 2262 | { |
| 2263 | if (IS_RIP_DEBUG_EVENT) |
| 2264 | zlog_info ("multicast announce on %s ", ifp->name); |
| 2265 | |
paul | cc1131a | 2003-10-15 23:20:17 +0000 | [diff] [blame] | 2266 | rip_output_process (ifp, NULL, NULL, route_type, rip->version_send, |
| 2267 | saddr); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 2268 | return; |
| 2269 | } |
| 2270 | |
| 2271 | /* If we can't send multicast packet, send it with unicast. */ |
| 2272 | if (if_is_broadcast (ifp) || if_is_pointopoint (ifp)) |
| 2273 | { |
| 2274 | for (node = listhead (ifp->connected); node; nextnode (node)) |
| 2275 | { |
| 2276 | connected = getdata (node); |
| 2277 | |
| 2278 | /* Fetch broadcast address or poin-to-point destination |
| 2279 | address . */ |
| 2280 | p = (struct prefix_ipv4 *) connected->destination; |
| 2281 | |
| 2282 | if (p->family == AF_INET) |
| 2283 | { |
| 2284 | /* Destination address and port setting. */ |
| 2285 | memset (&to, 0, sizeof (struct sockaddr_in)); |
| 2286 | to.sin_addr = p->prefix; |
| 2287 | to.sin_port = htons (RIP_PORT_DEFAULT); |
| 2288 | |
| 2289 | if (IS_RIP_DEBUG_EVENT) |
| 2290 | zlog_info ("%s announce to %s on %s", |
| 2291 | if_is_pointopoint (ifp) ? "unicast" : "broadcast", |
| 2292 | inet_ntoa (to.sin_addr), ifp->name); |
| 2293 | |
paul | 727d104 | 2002-12-13 20:50:29 +0000 | [diff] [blame] | 2294 | rip_output_process (ifp, connected->address, &to, route_type, |
paul | cc1131a | 2003-10-15 23:20:17 +0000 | [diff] [blame] | 2295 | rip->version_send, saddr); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 2296 | } |
| 2297 | } |
| 2298 | } |
| 2299 | } |
| 2300 | |
| 2301 | /* Update send to all interface and neighbor. */ |
| 2302 | void |
| 2303 | rip_update_process (int route_type) |
| 2304 | { |
paul | cc1131a | 2003-10-15 23:20:17 +0000 | [diff] [blame] | 2305 | listnode node, ifnode; |
| 2306 | struct connected *connected; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 2307 | struct interface *ifp; |
| 2308 | struct rip_interface *ri; |
| 2309 | struct route_node *rp; |
| 2310 | struct sockaddr_in to; |
| 2311 | struct prefix_ipv4 *p; |
| 2312 | |
| 2313 | /* Send RIP update to each interface. */ |
| 2314 | for (node = listhead (iflist); node; nextnode (node)) |
| 2315 | { |
| 2316 | ifp = getdata (node); |
| 2317 | |
| 2318 | if (if_is_loopback (ifp)) |
| 2319 | continue; |
| 2320 | |
paul | 2e3b2e4 | 2002-12-13 21:03:13 +0000 | [diff] [blame] | 2321 | if (! if_is_operative (ifp)) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 2322 | continue; |
| 2323 | |
| 2324 | /* Fetch RIP interface information. */ |
| 2325 | ri = ifp->info; |
| 2326 | |
| 2327 | /* When passive interface is specified, suppress announce to the |
| 2328 | interface. */ |
| 2329 | if (ri->passive) |
| 2330 | continue; |
| 2331 | |
| 2332 | if (ri->running) |
| 2333 | { |
| 2334 | if (IS_RIP_DEBUG_EVENT) |
| 2335 | { |
| 2336 | if (ifp->name) |
| 2337 | zlog_info ("SEND UPDATE to %s ifindex %d", |
| 2338 | ifp->name, ifp->ifindex); |
| 2339 | else |
| 2340 | zlog_info ("SEND UPDATE to _unknown_ ifindex %d", |
| 2341 | ifp->ifindex); |
| 2342 | } |
| 2343 | |
paul | cc1131a | 2003-10-15 23:20:17 +0000 | [diff] [blame] | 2344 | /* send update on each connected network */ |
| 2345 | |
| 2346 | LIST_LOOP(ifp->connected, connected, ifnode) |
| 2347 | { |
| 2348 | struct prefix_ipv4 *ifaddr; |
| 2349 | |
| 2350 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 2351 | /* If there is no version configuration in the interface, |
| 2352 | use rip's version setting. */ |
paul | f38a471 | 2003-06-07 01:10:00 +0000 | [diff] [blame] | 2353 | int vsend = ((ri->ri_send == RI_RIP_UNSPEC) ? |
| 2354 | rip->version_send : ri->ri_send); |
paul | cc1131a | 2003-10-15 23:20:17 +0000 | [diff] [blame] | 2355 | |
| 2356 | ifaddr = (struct prefix_ipv4 *) connected->address; |
| 2357 | |
| 2358 | if (ifaddr->family != AF_INET) |
| 2359 | continue; |
| 2360 | |
| 2361 | rip_interface_multicast_set(rip->sock, connected, |
| 2362 | if_is_pointopoint(ifp)); |
paul | f38a471 | 2003-06-07 01:10:00 +0000 | [diff] [blame] | 2363 | if (vsend & RIPv1) |
paul | cc1131a | 2003-10-15 23:20:17 +0000 | [diff] [blame] | 2364 | rip_update_interface (ifp, RIPv1, route_type, ifaddr); |
paul | f38a471 | 2003-06-07 01:10:00 +0000 | [diff] [blame] | 2365 | if (vsend & RIPv2) |
paul | cc1131a | 2003-10-15 23:20:17 +0000 | [diff] [blame] | 2366 | rip_update_interface (ifp, RIPv2, route_type, ifaddr); |
paul | f38a471 | 2003-06-07 01:10:00 +0000 | [diff] [blame] | 2367 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 2368 | } |
| 2369 | } |
| 2370 | |
| 2371 | /* RIP send updates to each neighbor. */ |
| 2372 | for (rp = route_top (rip->neighbor); rp; rp = route_next (rp)) |
| 2373 | if (rp->info != NULL) |
| 2374 | { |
| 2375 | p = (struct prefix_ipv4 *) &rp->p; |
| 2376 | |
| 2377 | ifp = if_lookup_address (p->prefix); |
| 2378 | if (! ifp) |
| 2379 | { |
| 2380 | zlog_warn ("Neighbor %s doesn't exist direct connected network", |
| 2381 | inet_ntoa (p->prefix)); |
| 2382 | continue; |
| 2383 | } |
| 2384 | |
| 2385 | /* Set destination address and port */ |
| 2386 | memset (&to, 0, sizeof (struct sockaddr_in)); |
| 2387 | to.sin_addr = p->prefix; |
| 2388 | to.sin_port = htons (RIP_PORT_DEFAULT); |
| 2389 | |
| 2390 | /* RIP version is rip's configuration. */ |
paul | cc1131a | 2003-10-15 23:20:17 +0000 | [diff] [blame] | 2391 | rip_output_process (ifp, NULL, &to, route_type, rip->version_send, p); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 2392 | } |
| 2393 | } |
| 2394 | |
| 2395 | /* RIP's periodical timer. */ |
| 2396 | int |
| 2397 | rip_update (struct thread *t) |
| 2398 | { |
| 2399 | /* Clear timer pointer. */ |
| 2400 | rip->t_update = NULL; |
| 2401 | |
| 2402 | if (IS_RIP_DEBUG_EVENT) |
| 2403 | zlog_info ("update timer fire!"); |
| 2404 | |
| 2405 | /* Process update output. */ |
| 2406 | rip_update_process (rip_all_route); |
| 2407 | |
| 2408 | /* Triggered updates may be suppressed if a regular update is due by |
| 2409 | the time the triggered update would be sent. */ |
| 2410 | if (rip->t_triggered_interval) |
| 2411 | { |
| 2412 | thread_cancel (rip->t_triggered_interval); |
| 2413 | rip->t_triggered_interval = NULL; |
| 2414 | } |
| 2415 | rip->trigger = 0; |
| 2416 | |
| 2417 | /* Register myself. */ |
| 2418 | rip_event (RIP_UPDATE_EVENT, 0); |
| 2419 | |
| 2420 | return 0; |
| 2421 | } |
| 2422 | |
| 2423 | /* Walk down the RIP routing table then clear changed flag. */ |
| 2424 | void |
| 2425 | rip_clear_changed_flag () |
| 2426 | { |
| 2427 | struct route_node *rp; |
| 2428 | struct rip_info *rinfo; |
| 2429 | |
| 2430 | for (rp = route_top (rip->table); rp; rp = route_next (rp)) |
| 2431 | if ((rinfo = rp->info) != NULL) |
| 2432 | if (rinfo->flags & RIP_RTF_CHANGED) |
| 2433 | rinfo->flags &= ~RIP_RTF_CHANGED; |
| 2434 | } |
| 2435 | |
| 2436 | /* Triggered update interval timer. */ |
| 2437 | int |
| 2438 | rip_triggered_interval (struct thread *t) |
| 2439 | { |
| 2440 | int rip_triggered_update (struct thread *); |
| 2441 | |
| 2442 | rip->t_triggered_interval = NULL; |
| 2443 | |
| 2444 | if (rip->trigger) |
| 2445 | { |
| 2446 | rip->trigger = 0; |
| 2447 | rip_triggered_update (t); |
| 2448 | } |
| 2449 | return 0; |
| 2450 | } |
| 2451 | |
| 2452 | /* Execute triggered update. */ |
| 2453 | int |
| 2454 | rip_triggered_update (struct thread *t) |
| 2455 | { |
| 2456 | int interval; |
| 2457 | |
| 2458 | /* Clear thred pointer. */ |
| 2459 | rip->t_triggered_update = NULL; |
| 2460 | |
| 2461 | /* Cancel interval timer. */ |
| 2462 | if (rip->t_triggered_interval) |
| 2463 | { |
| 2464 | thread_cancel (rip->t_triggered_interval); |
| 2465 | rip->t_triggered_interval = NULL; |
| 2466 | } |
| 2467 | rip->trigger = 0; |
| 2468 | |
| 2469 | /* Logging triggered update. */ |
| 2470 | if (IS_RIP_DEBUG_EVENT) |
| 2471 | zlog_info ("triggered update!"); |
| 2472 | |
| 2473 | /* Split Horizon processing is done when generating triggered |
| 2474 | updates as well as normal updates (see section 2.6). */ |
| 2475 | rip_update_process (rip_changed_route); |
| 2476 | |
| 2477 | /* Once all of the triggered updates have been generated, the route |
| 2478 | change flags should be cleared. */ |
| 2479 | rip_clear_changed_flag (); |
| 2480 | |
| 2481 | /* After a triggered update is sent, a timer should be set for a |
| 2482 | random interval between 1 and 5 seconds. If other changes that |
| 2483 | would trigger updates occur before the timer expires, a single |
| 2484 | update is triggered when the timer expires. */ |
| 2485 | interval = (random () % 5) + 1; |
| 2486 | |
| 2487 | rip->t_triggered_interval = |
| 2488 | thread_add_timer (master, rip_triggered_interval, NULL, interval); |
| 2489 | |
| 2490 | return 0; |
| 2491 | } |
| 2492 | |
| 2493 | /* Withdraw redistributed route. */ |
| 2494 | void |
| 2495 | rip_redistribute_withdraw (int type) |
| 2496 | { |
| 2497 | struct route_node *rp; |
| 2498 | struct rip_info *rinfo; |
| 2499 | |
| 2500 | if (!rip) |
| 2501 | return; |
| 2502 | |
| 2503 | for (rp = route_top (rip->table); rp; rp = route_next (rp)) |
| 2504 | if ((rinfo = rp->info) != NULL) |
| 2505 | { |
| 2506 | if (rinfo->type == type |
| 2507 | && rinfo->sub_type != RIP_ROUTE_INTERFACE) |
| 2508 | { |
| 2509 | /* Perform poisoned reverse. */ |
| 2510 | rinfo->metric = RIP_METRIC_INFINITY; |
| 2511 | RIP_TIMER_ON (rinfo->t_garbage_collect, |
| 2512 | rip_garbage_collect, rip->garbage_time); |
| 2513 | RIP_TIMER_OFF (rinfo->t_timeout); |
| 2514 | rinfo->flags |= RIP_RTF_CHANGED; |
| 2515 | |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 2516 | if (IS_RIP_DEBUG_EVENT) { |
| 2517 | struct prefix_ipv4 *p = (struct prefix_ipv4 *) &rp->p; |
| 2518 | |
| 2519 | zlog_info ("Poisone %s/%d on the interface %s with an infinity metric [withdraw]", |
| 2520 | inet_ntoa(p->prefix), p->prefixlen, |
| 2521 | ifindex2ifname(rinfo->ifindex)); |
| 2522 | } |
| 2523 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 2524 | rip_event (RIP_TRIGGERED_UPDATE, 0); |
| 2525 | } |
| 2526 | } |
| 2527 | } |
| 2528 | |
| 2529 | /* Create new RIP instance and set it to global variable. */ |
| 2530 | int |
| 2531 | rip_create () |
| 2532 | { |
| 2533 | rip = XMALLOC (MTYPE_RIP, sizeof (struct rip)); |
| 2534 | memset (rip, 0, sizeof (struct rip)); |
| 2535 | |
| 2536 | /* Set initial value. */ |
paul | f38a471 | 2003-06-07 01:10:00 +0000 | [diff] [blame] | 2537 | rip->version_send = RI_RIP_VERSION_2; |
| 2538 | rip->version_recv = RI_RIP_VERSION_1_AND_2; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 2539 | rip->update_time = RIP_UPDATE_TIMER_DEFAULT; |
| 2540 | rip->timeout_time = RIP_TIMEOUT_TIMER_DEFAULT; |
| 2541 | rip->garbage_time = RIP_GARBAGE_TIMER_DEFAULT; |
| 2542 | rip->default_metric = RIP_DEFAULT_METRIC_DEFAULT; |
| 2543 | |
| 2544 | /* Initialize RIP routig table. */ |
| 2545 | rip->table = route_table_init (); |
| 2546 | rip->route = route_table_init (); |
| 2547 | rip->neighbor = route_table_init (); |
| 2548 | |
| 2549 | /* Make output stream. */ |
| 2550 | rip->obuf = stream_new (1500); |
| 2551 | |
| 2552 | /* Make socket. */ |
| 2553 | rip->sock = rip_create_socket (); |
| 2554 | if (rip->sock < 0) |
| 2555 | return rip->sock; |
| 2556 | |
| 2557 | /* Create read and timer thread. */ |
| 2558 | rip_event (RIP_READ, rip->sock); |
| 2559 | rip_event (RIP_UPDATE_EVENT, 1); |
| 2560 | |
| 2561 | return 0; |
| 2562 | } |
| 2563 | |
| 2564 | /* Sned RIP request to the destination. */ |
| 2565 | int |
| 2566 | rip_request_send (struct sockaddr_in *to, struct interface *ifp, |
| 2567 | u_char version) |
| 2568 | { |
| 2569 | struct rte *rte; |
| 2570 | struct rip_packet rip_packet; |
paul | cc1131a | 2003-10-15 23:20:17 +0000 | [diff] [blame] | 2571 | listnode node; |
| 2572 | struct connected *connected; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 2573 | |
| 2574 | memset (&rip_packet, 0, sizeof (rip_packet)); |
| 2575 | |
| 2576 | rip_packet.command = RIP_REQUEST; |
| 2577 | rip_packet.version = version; |
| 2578 | rte = rip_packet.rte; |
| 2579 | rte->metric = htonl (RIP_METRIC_INFINITY); |
| 2580 | |
paul | cc1131a | 2003-10-15 23:20:17 +0000 | [diff] [blame] | 2581 | /* send request on each connected network */ |
| 2582 | LIST_LOOP(ifp->connected, connected, node) |
| 2583 | { |
| 2584 | struct prefix_ipv4 *p; |
| 2585 | |
| 2586 | p = (struct prefix_ipv4 *) connected->address; |
| 2587 | |
| 2588 | if (p->family != AF_INET) |
| 2589 | continue; |
| 2590 | |
| 2591 | rip_interface_multicast_set(rip->sock, connected, |
| 2592 | if_is_pointopoint(ifp)); |
| 2593 | if (rip_send_packet ((caddr_t) &rip_packet, sizeof (rip_packet), |
| 2594 | to, ifp) != sizeof (rip_packet)) |
| 2595 | return -1; |
| 2596 | } |
| 2597 | return sizeof (rip_packet); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 2598 | } |
| 2599 | |
| 2600 | int |
| 2601 | rip_update_jitter (unsigned long time) |
| 2602 | { |
| 2603 | return ((rand () % (time + 1)) - (time / 2)); |
| 2604 | } |
| 2605 | |
| 2606 | void |
| 2607 | rip_event (enum rip_event event, int sock) |
| 2608 | { |
| 2609 | int jitter = 0; |
| 2610 | |
| 2611 | switch (event) |
| 2612 | { |
| 2613 | case RIP_READ: |
| 2614 | rip->t_read = thread_add_read (master, rip_read, NULL, sock); |
| 2615 | break; |
| 2616 | case RIP_UPDATE_EVENT: |
| 2617 | if (rip->t_update) |
| 2618 | { |
| 2619 | thread_cancel (rip->t_update); |
| 2620 | rip->t_update = NULL; |
| 2621 | } |
| 2622 | jitter = rip_update_jitter (rip->update_time); |
| 2623 | rip->t_update = |
| 2624 | thread_add_timer (master, rip_update, NULL, |
| 2625 | sock ? 2 : rip->update_time + jitter); |
| 2626 | break; |
| 2627 | case RIP_TRIGGERED_UPDATE: |
| 2628 | if (rip->t_triggered_interval) |
| 2629 | rip->trigger = 1; |
| 2630 | else if (! rip->t_triggered_update) |
| 2631 | rip->t_triggered_update = |
| 2632 | thread_add_event (master, rip_triggered_update, NULL, 0); |
| 2633 | break; |
| 2634 | default: |
| 2635 | break; |
| 2636 | } |
| 2637 | } |
| 2638 | |
| 2639 | DEFUN (router_rip, |
| 2640 | router_rip_cmd, |
| 2641 | "router rip", |
| 2642 | "Enable a routing process\n" |
| 2643 | "Routing Information Protocol (RIP)\n") |
| 2644 | { |
| 2645 | int ret; |
| 2646 | |
| 2647 | /* If rip is not enabled before. */ |
| 2648 | if (! rip) |
| 2649 | { |
| 2650 | ret = rip_create (); |
| 2651 | if (ret < 0) |
| 2652 | { |
| 2653 | zlog_info ("Can't create RIP"); |
| 2654 | return CMD_WARNING; |
| 2655 | } |
| 2656 | } |
| 2657 | vty->node = RIP_NODE; |
| 2658 | vty->index = rip; |
| 2659 | |
| 2660 | return CMD_SUCCESS; |
| 2661 | } |
| 2662 | |
| 2663 | DEFUN (no_router_rip, |
| 2664 | no_router_rip_cmd, |
| 2665 | "no router rip", |
| 2666 | NO_STR |
| 2667 | "Enable a routing process\n" |
| 2668 | "Routing Information Protocol (RIP)\n") |
| 2669 | { |
| 2670 | if (rip) |
| 2671 | rip_clean (); |
| 2672 | return CMD_SUCCESS; |
| 2673 | } |
| 2674 | |
| 2675 | DEFUN (rip_version, |
| 2676 | rip_version_cmd, |
| 2677 | "version <1-2>", |
| 2678 | "Set routing protocol version\n" |
| 2679 | "version\n") |
| 2680 | { |
| 2681 | int version; |
| 2682 | |
| 2683 | version = atoi (argv[0]); |
| 2684 | if (version != RIPv1 && version != RIPv2) |
| 2685 | { |
| 2686 | vty_out (vty, "invalid rip version %d%s", version, |
| 2687 | VTY_NEWLINE); |
| 2688 | return CMD_WARNING; |
| 2689 | } |
paul | f38a471 | 2003-06-07 01:10:00 +0000 | [diff] [blame] | 2690 | rip->version_send = version; |
| 2691 | rip->version_recv = version; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 2692 | |
| 2693 | return CMD_SUCCESS; |
| 2694 | } |
| 2695 | |
| 2696 | DEFUN (no_rip_version, |
| 2697 | no_rip_version_cmd, |
| 2698 | "no version", |
| 2699 | NO_STR |
| 2700 | "Set routing protocol version\n") |
| 2701 | { |
| 2702 | /* Set RIP version to the default. */ |
paul | f38a471 | 2003-06-07 01:10:00 +0000 | [diff] [blame] | 2703 | rip->version_send = RI_RIP_VERSION_2; |
| 2704 | rip->version_recv = RI_RIP_VERSION_1_AND_2; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 2705 | |
| 2706 | return CMD_SUCCESS; |
| 2707 | } |
| 2708 | |
| 2709 | ALIAS (no_rip_version, |
| 2710 | no_rip_version_val_cmd, |
| 2711 | "no version <1-2>", |
| 2712 | NO_STR |
| 2713 | "Set routing protocol version\n" |
| 2714 | "version\n") |
| 2715 | |
| 2716 | DEFUN (rip_route, |
| 2717 | rip_route_cmd, |
| 2718 | "route A.B.C.D/M", |
| 2719 | "RIP static route configuration\n" |
| 2720 | "IP prefix <network>/<length>\n") |
| 2721 | { |
| 2722 | int ret; |
| 2723 | struct prefix_ipv4 p; |
| 2724 | struct route_node *node; |
| 2725 | |
| 2726 | ret = str2prefix_ipv4 (argv[0], &p); |
| 2727 | if (ret < 0) |
| 2728 | { |
| 2729 | vty_out (vty, "Malformed address%s", VTY_NEWLINE); |
| 2730 | return CMD_WARNING; |
| 2731 | } |
| 2732 | apply_mask_ipv4 (&p); |
| 2733 | |
| 2734 | /* For router rip configuration. */ |
| 2735 | node = route_node_get (rip->route, (struct prefix *) &p); |
| 2736 | |
| 2737 | if (node->info) |
| 2738 | { |
| 2739 | vty_out (vty, "There is already same static route.%s", VTY_NEWLINE); |
| 2740 | route_unlock_node (node); |
| 2741 | return CMD_WARNING; |
| 2742 | } |
| 2743 | |
| 2744 | node->info = "static"; |
| 2745 | |
| 2746 | rip_redistribute_add (ZEBRA_ROUTE_RIP, RIP_ROUTE_STATIC, &p, 0, NULL); |
| 2747 | |
| 2748 | return CMD_SUCCESS; |
| 2749 | } |
| 2750 | |
| 2751 | DEFUN (no_rip_route, |
| 2752 | no_rip_route_cmd, |
| 2753 | "no route A.B.C.D/M", |
| 2754 | NO_STR |
| 2755 | "RIP static route configuration\n" |
| 2756 | "IP prefix <network>/<length>\n") |
| 2757 | { |
| 2758 | int ret; |
| 2759 | struct prefix_ipv4 p; |
| 2760 | struct route_node *node; |
| 2761 | |
| 2762 | ret = str2prefix_ipv4 (argv[0], &p); |
| 2763 | if (ret < 0) |
| 2764 | { |
| 2765 | vty_out (vty, "Malformed address%s", VTY_NEWLINE); |
| 2766 | return CMD_WARNING; |
| 2767 | } |
| 2768 | apply_mask_ipv4 (&p); |
| 2769 | |
| 2770 | /* For router rip configuration. */ |
| 2771 | node = route_node_lookup (rip->route, (struct prefix *) &p); |
| 2772 | if (! node) |
| 2773 | { |
| 2774 | vty_out (vty, "Can't find route %s.%s", argv[0], |
| 2775 | VTY_NEWLINE); |
| 2776 | return CMD_WARNING; |
| 2777 | } |
| 2778 | |
| 2779 | rip_redistribute_delete (ZEBRA_ROUTE_RIP, RIP_ROUTE_STATIC, &p, 0); |
| 2780 | route_unlock_node (node); |
| 2781 | |
| 2782 | node->info = NULL; |
| 2783 | route_unlock_node (node); |
| 2784 | |
| 2785 | return CMD_SUCCESS; |
| 2786 | } |
| 2787 | |
| 2788 | void |
| 2789 | rip_update_default_metric () |
| 2790 | { |
| 2791 | struct route_node *np; |
| 2792 | struct rip_info *rinfo; |
| 2793 | |
| 2794 | for (np = route_top (rip->table); np; np = route_next (np)) |
| 2795 | if ((rinfo = np->info) != NULL) |
| 2796 | if (rinfo->type != ZEBRA_ROUTE_RIP && rinfo->type != ZEBRA_ROUTE_CONNECT) |
| 2797 | rinfo->metric = rip->default_metric; |
| 2798 | } |
| 2799 | |
| 2800 | DEFUN (rip_default_metric, |
| 2801 | rip_default_metric_cmd, |
| 2802 | "default-metric <1-16>", |
| 2803 | "Set a metric of redistribute routes\n" |
| 2804 | "Default metric\n") |
| 2805 | { |
| 2806 | if (rip) |
| 2807 | { |
| 2808 | rip->default_metric = atoi (argv[0]); |
| 2809 | /* rip_update_default_metric (); */ |
| 2810 | } |
| 2811 | return CMD_SUCCESS; |
| 2812 | } |
| 2813 | |
| 2814 | DEFUN (no_rip_default_metric, |
| 2815 | no_rip_default_metric_cmd, |
| 2816 | "no default-metric", |
| 2817 | NO_STR |
| 2818 | "Set a metric of redistribute routes\n" |
| 2819 | "Default metric\n") |
| 2820 | { |
| 2821 | if (rip) |
| 2822 | { |
| 2823 | rip->default_metric = RIP_DEFAULT_METRIC_DEFAULT; |
| 2824 | /* rip_update_default_metric (); */ |
| 2825 | } |
| 2826 | return CMD_SUCCESS; |
| 2827 | } |
| 2828 | |
| 2829 | ALIAS (no_rip_default_metric, |
| 2830 | no_rip_default_metric_val_cmd, |
| 2831 | "no default-metric <1-16>", |
| 2832 | NO_STR |
| 2833 | "Set a metric of redistribute routes\n" |
| 2834 | "Default metric\n") |
| 2835 | |
| 2836 | DEFUN (rip_timers, |
| 2837 | rip_timers_cmd, |
| 2838 | "timers basic <5-2147483647> <5-2147483647> <5-2147483647>", |
| 2839 | "Adjust routing timers\n" |
| 2840 | "Basic routing protocol update timers\n" |
| 2841 | "Routing table update timer value in second. Default is 30.\n" |
| 2842 | "Routing information timeout timer. Default is 180.\n" |
| 2843 | "Garbage collection timer. Default is 120.\n") |
| 2844 | { |
| 2845 | unsigned long update; |
| 2846 | unsigned long timeout; |
| 2847 | unsigned long garbage; |
| 2848 | char *endptr = NULL; |
| 2849 | unsigned long RIP_TIMER_MAX = 2147483647; |
| 2850 | unsigned long RIP_TIMER_MIN = 5; |
| 2851 | |
| 2852 | update = strtoul (argv[0], &endptr, 10); |
| 2853 | if (update > RIP_TIMER_MAX || update < RIP_TIMER_MIN || *endptr != '\0') |
| 2854 | { |
| 2855 | vty_out (vty, "update timer value error%s", VTY_NEWLINE); |
| 2856 | return CMD_WARNING; |
| 2857 | } |
| 2858 | |
| 2859 | timeout = strtoul (argv[1], &endptr, 10); |
| 2860 | if (timeout > RIP_TIMER_MAX || timeout < RIP_TIMER_MIN || *endptr != '\0') |
| 2861 | { |
| 2862 | vty_out (vty, "timeout timer value error%s", VTY_NEWLINE); |
| 2863 | return CMD_WARNING; |
| 2864 | } |
| 2865 | |
| 2866 | garbage = strtoul (argv[2], &endptr, 10); |
| 2867 | if (garbage > RIP_TIMER_MAX || garbage < RIP_TIMER_MIN || *endptr != '\0') |
| 2868 | { |
| 2869 | vty_out (vty, "garbage timer value error%s", VTY_NEWLINE); |
| 2870 | return CMD_WARNING; |
| 2871 | } |
| 2872 | |
| 2873 | /* Set each timer value. */ |
| 2874 | rip->update_time = update; |
| 2875 | rip->timeout_time = timeout; |
| 2876 | rip->garbage_time = garbage; |
| 2877 | |
| 2878 | /* Reset update timer thread. */ |
| 2879 | rip_event (RIP_UPDATE_EVENT, 0); |
| 2880 | |
| 2881 | return CMD_SUCCESS; |
| 2882 | } |
| 2883 | |
| 2884 | DEFUN (no_rip_timers, |
| 2885 | no_rip_timers_cmd, |
| 2886 | "no timers basic", |
| 2887 | NO_STR |
| 2888 | "Adjust routing timers\n" |
| 2889 | "Basic routing protocol update timers\n") |
| 2890 | { |
| 2891 | /* Set each timer value to the default. */ |
| 2892 | rip->update_time = RIP_UPDATE_TIMER_DEFAULT; |
| 2893 | rip->timeout_time = RIP_TIMEOUT_TIMER_DEFAULT; |
| 2894 | rip->garbage_time = RIP_GARBAGE_TIMER_DEFAULT; |
| 2895 | |
| 2896 | /* Reset update timer thread. */ |
| 2897 | rip_event (RIP_UPDATE_EVENT, 0); |
| 2898 | |
| 2899 | return CMD_SUCCESS; |
| 2900 | } |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 2901 | |
| 2902 | ALIAS (no_rip_timers, |
| 2903 | no_rip_timers_val_cmd, |
| 2904 | "no timers basic <0-65535> <0-65535> <0-65535>", |
| 2905 | NO_STR |
| 2906 | "Adjust routing timers\n" |
| 2907 | "Basic routing protocol update timers\n" |
| 2908 | "Routing table update timer value in second. Default is 30.\n" |
| 2909 | "Routing information timeout timer. Default is 180.\n" |
| 2910 | "Garbage collection timer. Default is 120.\n") |
| 2911 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 2912 | |
| 2913 | struct route_table *rip_distance_table; |
| 2914 | |
| 2915 | struct rip_distance |
| 2916 | { |
| 2917 | /* Distance value for the IP source prefix. */ |
| 2918 | u_char distance; |
| 2919 | |
| 2920 | /* Name of the access-list to be matched. */ |
| 2921 | char *access_list; |
| 2922 | }; |
| 2923 | |
| 2924 | struct rip_distance * |
| 2925 | rip_distance_new () |
| 2926 | { |
| 2927 | struct rip_distance *new; |
| 2928 | new = XMALLOC (MTYPE_RIP_DISTANCE, sizeof (struct rip_distance)); |
| 2929 | memset (new, 0, sizeof (struct rip_distance)); |
| 2930 | return new; |
| 2931 | } |
| 2932 | |
| 2933 | void |
| 2934 | rip_distance_free (struct rip_distance *rdistance) |
| 2935 | { |
| 2936 | XFREE (MTYPE_RIP_DISTANCE, rdistance); |
| 2937 | } |
| 2938 | |
| 2939 | int |
| 2940 | rip_distance_set (struct vty *vty, char *distance_str, char *ip_str, |
| 2941 | char *access_list_str) |
| 2942 | { |
| 2943 | int ret; |
| 2944 | struct prefix_ipv4 p; |
| 2945 | u_char distance; |
| 2946 | struct route_node *rn; |
| 2947 | struct rip_distance *rdistance; |
| 2948 | |
| 2949 | ret = str2prefix_ipv4 (ip_str, &p); |
| 2950 | if (ret == 0) |
| 2951 | { |
| 2952 | vty_out (vty, "Malformed prefix%s", VTY_NEWLINE); |
| 2953 | return CMD_WARNING; |
| 2954 | } |
| 2955 | |
| 2956 | distance = atoi (distance_str); |
| 2957 | |
| 2958 | /* Get RIP distance node. */ |
| 2959 | rn = route_node_get (rip_distance_table, (struct prefix *) &p); |
| 2960 | if (rn->info) |
| 2961 | { |
| 2962 | rdistance = rn->info; |
| 2963 | route_unlock_node (rn); |
| 2964 | } |
| 2965 | else |
| 2966 | { |
| 2967 | rdistance = rip_distance_new (); |
| 2968 | rn->info = rdistance; |
| 2969 | } |
| 2970 | |
| 2971 | /* Set distance value. */ |
| 2972 | rdistance->distance = distance; |
| 2973 | |
| 2974 | /* Reset access-list configuration. */ |
| 2975 | if (rdistance->access_list) |
| 2976 | { |
| 2977 | free (rdistance->access_list); |
| 2978 | rdistance->access_list = NULL; |
| 2979 | } |
| 2980 | if (access_list_str) |
| 2981 | rdistance->access_list = strdup (access_list_str); |
| 2982 | |
| 2983 | return CMD_SUCCESS; |
| 2984 | } |
| 2985 | |
| 2986 | int |
| 2987 | rip_distance_unset (struct vty *vty, char *distance_str, char *ip_str, |
| 2988 | char *access_list_str) |
| 2989 | { |
| 2990 | int ret; |
| 2991 | struct prefix_ipv4 p; |
| 2992 | u_char distance; |
| 2993 | struct route_node *rn; |
| 2994 | struct rip_distance *rdistance; |
| 2995 | |
| 2996 | ret = str2prefix_ipv4 (ip_str, &p); |
| 2997 | if (ret == 0) |
| 2998 | { |
| 2999 | vty_out (vty, "Malformed prefix%s", VTY_NEWLINE); |
| 3000 | return CMD_WARNING; |
| 3001 | } |
| 3002 | |
| 3003 | distance = atoi (distance_str); |
| 3004 | |
| 3005 | rn = route_node_lookup (rip_distance_table, (struct prefix *)&p); |
| 3006 | if (! rn) |
| 3007 | { |
| 3008 | vty_out (vty, "Can't find specified prefix%s", VTY_NEWLINE); |
| 3009 | return CMD_WARNING; |
| 3010 | } |
| 3011 | |
| 3012 | rdistance = rn->info; |
| 3013 | |
| 3014 | if (rdistance->access_list) |
| 3015 | free (rdistance->access_list); |
| 3016 | rip_distance_free (rdistance); |
| 3017 | |
| 3018 | rn->info = NULL; |
| 3019 | route_unlock_node (rn); |
| 3020 | route_unlock_node (rn); |
| 3021 | |
| 3022 | return CMD_SUCCESS; |
| 3023 | } |
| 3024 | |
| 3025 | void |
| 3026 | rip_distance_reset () |
| 3027 | { |
| 3028 | struct route_node *rn; |
| 3029 | struct rip_distance *rdistance; |
| 3030 | |
| 3031 | for (rn = route_top (rip_distance_table); rn; rn = route_next (rn)) |
| 3032 | if ((rdistance = rn->info) != NULL) |
| 3033 | { |
| 3034 | if (rdistance->access_list) |
| 3035 | free (rdistance->access_list); |
| 3036 | rip_distance_free (rdistance); |
| 3037 | rn->info = NULL; |
| 3038 | route_unlock_node (rn); |
| 3039 | } |
| 3040 | } |
| 3041 | |
| 3042 | /* Apply RIP information to distance method. */ |
| 3043 | u_char |
| 3044 | rip_distance_apply (struct rip_info *rinfo) |
| 3045 | { |
| 3046 | struct route_node *rn; |
| 3047 | struct prefix_ipv4 p; |
| 3048 | struct rip_distance *rdistance; |
| 3049 | struct access_list *alist; |
| 3050 | |
| 3051 | if (! rip) |
| 3052 | return 0; |
| 3053 | |
| 3054 | memset (&p, 0, sizeof (struct prefix_ipv4)); |
| 3055 | p.family = AF_INET; |
| 3056 | p.prefix = rinfo->from; |
| 3057 | p.prefixlen = IPV4_MAX_BITLEN; |
| 3058 | |
| 3059 | /* Check source address. */ |
| 3060 | rn = route_node_match (rip_distance_table, (struct prefix *) &p); |
| 3061 | if (rn) |
| 3062 | { |
| 3063 | rdistance = rn->info; |
| 3064 | route_unlock_node (rn); |
| 3065 | |
| 3066 | if (rdistance->access_list) |
| 3067 | { |
| 3068 | alist = access_list_lookup (AFI_IP, rdistance->access_list); |
| 3069 | if (alist == NULL) |
| 3070 | return 0; |
| 3071 | if (access_list_apply (alist, &rinfo->rp->p) == FILTER_DENY) |
| 3072 | return 0; |
| 3073 | |
| 3074 | return rdistance->distance; |
| 3075 | } |
| 3076 | else |
| 3077 | return rdistance->distance; |
| 3078 | } |
| 3079 | |
| 3080 | if (rip->distance) |
| 3081 | return rip->distance; |
| 3082 | |
| 3083 | return 0; |
| 3084 | } |
| 3085 | |
| 3086 | void |
| 3087 | rip_distance_show (struct vty *vty) |
| 3088 | { |
| 3089 | struct route_node *rn; |
| 3090 | struct rip_distance *rdistance; |
| 3091 | int header = 1; |
| 3092 | char buf[BUFSIZ]; |
| 3093 | |
| 3094 | vty_out (vty, " Distance: (default is %d)%s", |
| 3095 | rip->distance ? rip->distance :ZEBRA_RIP_DISTANCE_DEFAULT, |
| 3096 | VTY_NEWLINE); |
| 3097 | |
| 3098 | for (rn = route_top (rip_distance_table); rn; rn = route_next (rn)) |
| 3099 | if ((rdistance = rn->info) != NULL) |
| 3100 | { |
| 3101 | if (header) |
| 3102 | { |
| 3103 | vty_out (vty, " Address Distance List%s", |
| 3104 | VTY_NEWLINE); |
| 3105 | header = 0; |
| 3106 | } |
| 3107 | sprintf (buf, "%s/%d", inet_ntoa (rn->p.u.prefix4), rn->p.prefixlen); |
| 3108 | vty_out (vty, " %-20s %4d %s%s", |
| 3109 | buf, rdistance->distance, |
| 3110 | rdistance->access_list ? rdistance->access_list : "", |
| 3111 | VTY_NEWLINE); |
| 3112 | } |
| 3113 | } |
| 3114 | |
| 3115 | DEFUN (rip_distance, |
| 3116 | rip_distance_cmd, |
| 3117 | "distance <1-255>", |
| 3118 | "Administrative distance\n" |
| 3119 | "Distance value\n") |
| 3120 | { |
| 3121 | rip->distance = atoi (argv[0]); |
| 3122 | return CMD_SUCCESS; |
| 3123 | } |
| 3124 | |
| 3125 | DEFUN (no_rip_distance, |
| 3126 | no_rip_distance_cmd, |
| 3127 | "no distance <1-255>", |
| 3128 | NO_STR |
| 3129 | "Administrative distance\n" |
| 3130 | "Distance value\n") |
| 3131 | { |
| 3132 | rip->distance = 0; |
| 3133 | return CMD_SUCCESS; |
| 3134 | } |
| 3135 | |
| 3136 | DEFUN (rip_distance_source, |
| 3137 | rip_distance_source_cmd, |
| 3138 | "distance <1-255> A.B.C.D/M", |
| 3139 | "Administrative distance\n" |
| 3140 | "Distance value\n" |
| 3141 | "IP source prefix\n") |
| 3142 | { |
| 3143 | rip_distance_set (vty, argv[0], argv[1], NULL); |
| 3144 | return CMD_SUCCESS; |
| 3145 | } |
| 3146 | |
| 3147 | DEFUN (no_rip_distance_source, |
| 3148 | no_rip_distance_source_cmd, |
| 3149 | "no distance <1-255> A.B.C.D/M", |
| 3150 | NO_STR |
| 3151 | "Administrative distance\n" |
| 3152 | "Distance value\n" |
| 3153 | "IP source prefix\n") |
| 3154 | { |
| 3155 | rip_distance_unset (vty, argv[0], argv[1], NULL); |
| 3156 | return CMD_SUCCESS; |
| 3157 | } |
| 3158 | |
| 3159 | DEFUN (rip_distance_source_access_list, |
| 3160 | rip_distance_source_access_list_cmd, |
| 3161 | "distance <1-255> A.B.C.D/M WORD", |
| 3162 | "Administrative distance\n" |
| 3163 | "Distance value\n" |
| 3164 | "IP source prefix\n" |
| 3165 | "Access list name\n") |
| 3166 | { |
| 3167 | rip_distance_set (vty, argv[0], argv[1], argv[2]); |
| 3168 | return CMD_SUCCESS; |
| 3169 | } |
| 3170 | |
| 3171 | DEFUN (no_rip_distance_source_access_list, |
| 3172 | no_rip_distance_source_access_list_cmd, |
| 3173 | "no distance <1-255> A.B.C.D/M WORD", |
| 3174 | NO_STR |
| 3175 | "Administrative distance\n" |
| 3176 | "Distance value\n" |
| 3177 | "IP source prefix\n" |
| 3178 | "Access list name\n") |
| 3179 | { |
| 3180 | rip_distance_unset (vty, argv[0], argv[1], argv[2]); |
| 3181 | return CMD_SUCCESS; |
| 3182 | } |
| 3183 | |
| 3184 | /* Print out routes update time. */ |
| 3185 | void |
| 3186 | rip_vty_out_uptime (struct vty *vty, struct rip_info *rinfo) |
| 3187 | { |
| 3188 | struct timeval timer_now; |
| 3189 | time_t clock; |
| 3190 | struct tm *tm; |
| 3191 | #define TIME_BUF 25 |
| 3192 | char timebuf [TIME_BUF]; |
| 3193 | struct thread *thread; |
| 3194 | |
| 3195 | gettimeofday (&timer_now, NULL); |
| 3196 | |
| 3197 | if ((thread = rinfo->t_timeout) != NULL) |
| 3198 | { |
| 3199 | clock = thread->u.sands.tv_sec - timer_now.tv_sec; |
| 3200 | tm = gmtime (&clock); |
| 3201 | strftime (timebuf, TIME_BUF, "%M:%S", tm); |
| 3202 | vty_out (vty, "%5s", timebuf); |
| 3203 | } |
| 3204 | else if ((thread = rinfo->t_garbage_collect) != NULL) |
| 3205 | { |
| 3206 | clock = thread->u.sands.tv_sec - timer_now.tv_sec; |
| 3207 | tm = gmtime (&clock); |
| 3208 | strftime (timebuf, TIME_BUF, "%M:%S", tm); |
| 3209 | vty_out (vty, "%5s", timebuf); |
| 3210 | } |
| 3211 | } |
| 3212 | |
| 3213 | char * |
| 3214 | rip_route_type_print (int sub_type) |
| 3215 | { |
| 3216 | switch (sub_type) |
| 3217 | { |
| 3218 | case RIP_ROUTE_RTE: |
| 3219 | return "n"; |
| 3220 | case RIP_ROUTE_STATIC: |
| 3221 | return "s"; |
| 3222 | case RIP_ROUTE_DEFAULT: |
| 3223 | return "d"; |
| 3224 | case RIP_ROUTE_REDISTRIBUTE: |
| 3225 | return "r"; |
| 3226 | case RIP_ROUTE_INTERFACE: |
| 3227 | return "i"; |
| 3228 | default: |
| 3229 | return "?"; |
| 3230 | } |
| 3231 | } |
| 3232 | |
| 3233 | DEFUN (show_ip_rip, |
| 3234 | show_ip_rip_cmd, |
| 3235 | "show ip rip", |
| 3236 | SHOW_STR |
| 3237 | IP_STR |
| 3238 | "Show RIP routes\n") |
| 3239 | { |
| 3240 | struct route_node *np; |
| 3241 | struct rip_info *rinfo; |
| 3242 | |
| 3243 | if (! rip) |
| 3244 | return CMD_SUCCESS; |
| 3245 | |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 3246 | vty_out (vty, "Codes: R - RIP, C - connected, S - Static, O - OSPF, B - BGP%s" |
| 3247 | "Sub-codes:%s" |
| 3248 | " (n) - normal, (s) - static, (d) - default, (r) - redistribute,%s" |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 3249 | " (i) - interface%s%s" |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 3250 | " Network Next Hop Metric From Tag Time%s", |
| 3251 | VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 3252 | |
| 3253 | for (np = route_top (rip->table); np; np = route_next (np)) |
| 3254 | if ((rinfo = np->info) != NULL) |
| 3255 | { |
| 3256 | int len; |
| 3257 | |
| 3258 | len = vty_out (vty, "%s(%s) %s/%d", |
| 3259 | /* np->lock, For debugging. */ |
| 3260 | route_info[rinfo->type].str, |
| 3261 | rip_route_type_print (rinfo->sub_type), |
| 3262 | inet_ntoa (np->p.u.prefix4), np->p.prefixlen); |
| 3263 | |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 3264 | len = 21 - len; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 3265 | |
| 3266 | if (len > 0) |
| 3267 | vty_out (vty, "%*s", len, " "); |
| 3268 | |
| 3269 | if (rinfo->nexthop.s_addr) |
| 3270 | vty_out (vty, "%-20s %2d ", inet_ntoa (rinfo->nexthop), |
| 3271 | rinfo->metric); |
| 3272 | else |
| 3273 | vty_out (vty, "0.0.0.0 %2d ", rinfo->metric); |
| 3274 | |
| 3275 | /* Route which exist in kernel routing table. */ |
| 3276 | if ((rinfo->type == ZEBRA_ROUTE_RIP) && |
| 3277 | (rinfo->sub_type == RIP_ROUTE_RTE)) |
| 3278 | { |
| 3279 | vty_out (vty, "%-15s ", inet_ntoa (rinfo->from)); |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 3280 | vty_out (vty, "%3d ", rinfo->tag); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 3281 | rip_vty_out_uptime (vty, rinfo); |
| 3282 | } |
| 3283 | else if (rinfo->metric == RIP_METRIC_INFINITY) |
| 3284 | { |
| 3285 | vty_out (vty, "self "); |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 3286 | vty_out (vty, "%3d ", rinfo->tag); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 3287 | rip_vty_out_uptime (vty, rinfo); |
| 3288 | } |
| 3289 | else |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 3290 | { |
| 3291 | vty_out (vty, "self "); |
| 3292 | vty_out (vty, "%3d", rinfo->tag); |
| 3293 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 3294 | |
| 3295 | vty_out (vty, "%s", VTY_NEWLINE); |
| 3296 | } |
| 3297 | return CMD_SUCCESS; |
| 3298 | } |
| 3299 | |
| 3300 | /* Return next event time. */ |
| 3301 | int |
| 3302 | rip_next_thread_timer (struct thread *thread) |
| 3303 | { |
| 3304 | struct timeval timer_now; |
| 3305 | |
| 3306 | gettimeofday (&timer_now, NULL); |
| 3307 | |
| 3308 | return thread->u.sands.tv_sec - timer_now.tv_sec; |
| 3309 | } |
| 3310 | |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 3311 | /* Vincent: formerly, it was show_ip_protocols_rip: "show ip protocols" */ |
| 3312 | DEFUN (show_ip_rip_status, |
| 3313 | show_ip_rip_status_cmd, |
| 3314 | "show ip rip status", |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 3315 | SHOW_STR |
| 3316 | IP_STR |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 3317 | "Show RIP routes\n" |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 3318 | "IP routing protocol process parameters and statistics\n") |
| 3319 | { |
| 3320 | listnode node; |
| 3321 | struct interface *ifp; |
| 3322 | struct rip_interface *ri; |
| 3323 | extern struct message ri_version_msg[]; |
| 3324 | char *send_version; |
| 3325 | char *receive_version; |
| 3326 | |
| 3327 | if (! rip) |
| 3328 | return CMD_SUCCESS; |
| 3329 | |
| 3330 | vty_out (vty, "Routing Protocol is \"rip\"%s", VTY_NEWLINE); |
| 3331 | vty_out (vty, " Sending updates every %ld seconds with +/-50%%,", |
| 3332 | rip->update_time); |
| 3333 | vty_out (vty, " next due in %d seconds%s", |
| 3334 | rip_next_thread_timer (rip->t_update), |
| 3335 | VTY_NEWLINE); |
| 3336 | vty_out (vty, " Timeout after %ld seconds,", rip->timeout_time); |
| 3337 | vty_out (vty, " garbage collect after %ld seconds%s", rip->garbage_time, |
| 3338 | VTY_NEWLINE); |
| 3339 | |
| 3340 | /* Filtering status show. */ |
| 3341 | config_show_distribute (vty); |
| 3342 | |
| 3343 | /* Default metric information. */ |
| 3344 | vty_out (vty, " Default redistribution metric is %d%s", |
| 3345 | rip->default_metric, VTY_NEWLINE); |
| 3346 | |
| 3347 | /* Redistribute information. */ |
| 3348 | vty_out (vty, " Redistributing:"); |
| 3349 | config_write_rip_redistribute (vty, 0); |
| 3350 | vty_out (vty, "%s", VTY_NEWLINE); |
| 3351 | |
paul | f38a471 | 2003-06-07 01:10:00 +0000 | [diff] [blame] | 3352 | vty_out (vty, " Default version control: send version %s,", |
| 3353 | lookup(ri_version_msg,rip->version_send)); |
| 3354 | if (rip->version_recv == RI_RIP_VERSION_1_AND_2) |
| 3355 | vty_out (vty, " receive any version %s", VTY_NEWLINE); |
| 3356 | else |
| 3357 | vty_out (vty, " receive version %s %s", |
| 3358 | lookup(ri_version_msg,rip->version_recv), VTY_NEWLINE); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 3359 | |
| 3360 | vty_out (vty, " Interface Send Recv Key-chain%s", VTY_NEWLINE); |
| 3361 | |
| 3362 | for (node = listhead (iflist); node; node = nextnode (node)) |
| 3363 | { |
| 3364 | ifp = getdata (node); |
| 3365 | ri = ifp->info; |
| 3366 | |
| 3367 | if (ri->enable_network || ri->enable_interface) |
| 3368 | { |
| 3369 | if (ri->ri_send == RI_RIP_UNSPEC) |
paul | f38a471 | 2003-06-07 01:10:00 +0000 | [diff] [blame] | 3370 | send_version = lookup (ri_version_msg, rip->version_send); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 3371 | else |
| 3372 | send_version = lookup (ri_version_msg, ri->ri_send); |
| 3373 | |
| 3374 | if (ri->ri_receive == RI_RIP_UNSPEC) |
paul | f38a471 | 2003-06-07 01:10:00 +0000 | [diff] [blame] | 3375 | receive_version = lookup (ri_version_msg, rip->version_recv); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 3376 | else |
| 3377 | receive_version = lookup (ri_version_msg, ri->ri_receive); |
| 3378 | |
| 3379 | vty_out (vty, " %-17s%-3s %-3s %s%s", ifp->name, |
| 3380 | send_version, |
| 3381 | receive_version, |
| 3382 | ri->key_chain ? ri->key_chain : "", |
| 3383 | VTY_NEWLINE); |
| 3384 | } |
| 3385 | } |
| 3386 | |
| 3387 | vty_out (vty, " Routing for Networks:%s", VTY_NEWLINE); |
| 3388 | config_write_rip_network (vty, 0); |
| 3389 | |
paul | 4aaff3f | 2003-06-07 01:04:45 +0000 | [diff] [blame] | 3390 | { |
| 3391 | int found_passive = 0; |
| 3392 | for (node = listhead (iflist); node; node = nextnode (node)) |
| 3393 | { |
| 3394 | ifp = getdata (node); |
| 3395 | ri = ifp->info; |
| 3396 | |
| 3397 | if ((ri->enable_network || ri->enable_interface) && ri->passive) |
| 3398 | { |
| 3399 | if (!found_passive) |
| 3400 | { |
| 3401 | vty_out (vty, " Passive Interface(s):%s", VTY_NEWLINE); |
| 3402 | found_passive = 1; |
| 3403 | } |
| 3404 | vty_out (vty, " %s%s", ifp->name, VTY_NEWLINE); |
| 3405 | } |
| 3406 | } |
| 3407 | } |
| 3408 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 3409 | vty_out (vty, " Routing Information Sources:%s", VTY_NEWLINE); |
| 3410 | vty_out (vty, " Gateway BadPackets BadRoutes Distance Last Update%s", VTY_NEWLINE); |
| 3411 | rip_peer_display (vty); |
| 3412 | |
| 3413 | rip_distance_show (vty); |
| 3414 | |
| 3415 | return CMD_SUCCESS; |
| 3416 | } |
| 3417 | |
| 3418 | /* RIP configuration write function. */ |
| 3419 | int |
| 3420 | config_write_rip (struct vty *vty) |
| 3421 | { |
| 3422 | int write = 0; |
| 3423 | struct route_node *rn; |
| 3424 | struct rip_distance *rdistance; |
| 3425 | |
| 3426 | if (rip) |
| 3427 | { |
| 3428 | /* Router RIP statement. */ |
| 3429 | vty_out (vty, "router rip%s", VTY_NEWLINE); |
| 3430 | write++; |
| 3431 | |
| 3432 | /* RIP version statement. Default is RIP version 2. */ |
paul | f38a471 | 2003-06-07 01:10:00 +0000 | [diff] [blame] | 3433 | if (rip->version_send != RI_RIP_VERSION_2 |
| 3434 | || rip->version_recv != RI_RIP_VERSION_1_AND_2) |
| 3435 | vty_out (vty, " version %d%s", rip->version_send, |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 3436 | VTY_NEWLINE); |
| 3437 | |
| 3438 | /* RIP timer configuration. */ |
| 3439 | if (rip->update_time != RIP_UPDATE_TIMER_DEFAULT |
| 3440 | || rip->timeout_time != RIP_TIMEOUT_TIMER_DEFAULT |
| 3441 | || rip->garbage_time != RIP_GARBAGE_TIMER_DEFAULT) |
| 3442 | vty_out (vty, " timers basic %lu %lu %lu%s", |
| 3443 | rip->update_time, |
| 3444 | rip->timeout_time, |
| 3445 | rip->garbage_time, |
| 3446 | VTY_NEWLINE); |
| 3447 | |
| 3448 | /* Default information configuration. */ |
| 3449 | if (rip->default_information) |
| 3450 | { |
| 3451 | if (rip->default_information_route_map) |
| 3452 | vty_out (vty, " default-information originate route-map %s%s", |
| 3453 | rip->default_information_route_map, VTY_NEWLINE); |
| 3454 | else |
| 3455 | vty_out (vty, " default-information originate%s", |
| 3456 | VTY_NEWLINE); |
| 3457 | } |
| 3458 | |
| 3459 | /* Redistribute configuration. */ |
| 3460 | config_write_rip_redistribute (vty, 1); |
| 3461 | |
| 3462 | /* RIP offset-list configuration. */ |
| 3463 | config_write_rip_offset_list (vty); |
| 3464 | |
| 3465 | /* RIP enabled network and interface configuration. */ |
| 3466 | config_write_rip_network (vty, 1); |
| 3467 | |
| 3468 | /* RIP default metric configuration */ |
| 3469 | if (rip->default_metric != RIP_DEFAULT_METRIC_DEFAULT) |
| 3470 | vty_out (vty, " default-metric %d%s", |
| 3471 | rip->default_metric, VTY_NEWLINE); |
| 3472 | |
| 3473 | /* Distribute configuration. */ |
| 3474 | write += config_write_distribute (vty); |
| 3475 | |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 3476 | /* Interface routemap configuration */ |
| 3477 | write += config_write_if_rmap (vty); |
| 3478 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 3479 | /* Distance configuration. */ |
| 3480 | if (rip->distance) |
| 3481 | vty_out (vty, " distance %d%s", rip->distance, VTY_NEWLINE); |
| 3482 | |
| 3483 | /* RIP source IP prefix distance configuration. */ |
| 3484 | for (rn = route_top (rip_distance_table); rn; rn = route_next (rn)) |
| 3485 | if ((rdistance = rn->info) != NULL) |
| 3486 | vty_out (vty, " distance %d %s/%d %s%s", rdistance->distance, |
| 3487 | inet_ntoa (rn->p.u.prefix4), rn->p.prefixlen, |
| 3488 | rdistance->access_list ? rdistance->access_list : "", |
| 3489 | VTY_NEWLINE); |
| 3490 | |
| 3491 | /* RIP static route configuration. */ |
| 3492 | for (rn = route_top (rip->route); rn; rn = route_next (rn)) |
| 3493 | if (rn->info) |
| 3494 | vty_out (vty, " route %s/%d%s", |
| 3495 | inet_ntoa (rn->p.u.prefix4), |
| 3496 | rn->p.prefixlen, |
| 3497 | VTY_NEWLINE); |
| 3498 | |
| 3499 | } |
| 3500 | return write; |
| 3501 | } |
| 3502 | |
| 3503 | /* RIP node structure. */ |
| 3504 | struct cmd_node rip_node = |
| 3505 | { |
| 3506 | RIP_NODE, |
| 3507 | "%s(config-router)# ", |
| 3508 | 1 |
| 3509 | }; |
| 3510 | |
| 3511 | /* Distribute-list update functions. */ |
| 3512 | void |
| 3513 | rip_distribute_update (struct distribute *dist) |
| 3514 | { |
| 3515 | struct interface *ifp; |
| 3516 | struct rip_interface *ri; |
| 3517 | struct access_list *alist; |
| 3518 | struct prefix_list *plist; |
| 3519 | |
| 3520 | if (! dist->ifname) |
| 3521 | return; |
| 3522 | |
| 3523 | ifp = if_lookup_by_name (dist->ifname); |
| 3524 | if (ifp == NULL) |
| 3525 | return; |
| 3526 | |
| 3527 | ri = ifp->info; |
| 3528 | |
| 3529 | if (dist->list[DISTRIBUTE_IN]) |
| 3530 | { |
| 3531 | alist = access_list_lookup (AFI_IP, dist->list[DISTRIBUTE_IN]); |
| 3532 | if (alist) |
| 3533 | ri->list[RIP_FILTER_IN] = alist; |
| 3534 | else |
| 3535 | ri->list[RIP_FILTER_IN] = NULL; |
| 3536 | } |
| 3537 | else |
| 3538 | ri->list[RIP_FILTER_IN] = NULL; |
| 3539 | |
| 3540 | if (dist->list[DISTRIBUTE_OUT]) |
| 3541 | { |
| 3542 | alist = access_list_lookup (AFI_IP, dist->list[DISTRIBUTE_OUT]); |
| 3543 | if (alist) |
| 3544 | ri->list[RIP_FILTER_OUT] = alist; |
| 3545 | else |
| 3546 | ri->list[RIP_FILTER_OUT] = NULL; |
| 3547 | } |
| 3548 | else |
| 3549 | ri->list[RIP_FILTER_OUT] = NULL; |
| 3550 | |
| 3551 | if (dist->prefix[DISTRIBUTE_IN]) |
| 3552 | { |
| 3553 | plist = prefix_list_lookup (AFI_IP, dist->prefix[DISTRIBUTE_IN]); |
| 3554 | if (plist) |
| 3555 | ri->prefix[RIP_FILTER_IN] = plist; |
| 3556 | else |
| 3557 | ri->prefix[RIP_FILTER_IN] = NULL; |
| 3558 | } |
| 3559 | else |
| 3560 | ri->prefix[RIP_FILTER_IN] = NULL; |
| 3561 | |
| 3562 | if (dist->prefix[DISTRIBUTE_OUT]) |
| 3563 | { |
| 3564 | plist = prefix_list_lookup (AFI_IP, dist->prefix[DISTRIBUTE_OUT]); |
| 3565 | if (plist) |
| 3566 | ri->prefix[RIP_FILTER_OUT] = plist; |
| 3567 | else |
| 3568 | ri->prefix[RIP_FILTER_OUT] = NULL; |
| 3569 | } |
| 3570 | else |
| 3571 | ri->prefix[RIP_FILTER_OUT] = NULL; |
| 3572 | } |
| 3573 | |
| 3574 | void |
| 3575 | rip_distribute_update_interface (struct interface *ifp) |
| 3576 | { |
| 3577 | struct distribute *dist; |
| 3578 | |
| 3579 | dist = distribute_lookup (ifp->name); |
| 3580 | if (dist) |
| 3581 | rip_distribute_update (dist); |
| 3582 | } |
| 3583 | |
| 3584 | /* Update all interface's distribute list. */ |
| 3585 | void |
| 3586 | rip_distribute_update_all () |
| 3587 | { |
| 3588 | struct interface *ifp; |
| 3589 | listnode node; |
| 3590 | |
| 3591 | for (node = listhead (iflist); node; nextnode (node)) |
| 3592 | { |
| 3593 | ifp = getdata (node); |
| 3594 | rip_distribute_update_interface (ifp); |
| 3595 | } |
| 3596 | } |
| 3597 | |
| 3598 | /* Delete all added rip route. */ |
| 3599 | void |
| 3600 | rip_clean () |
| 3601 | { |
| 3602 | int i; |
| 3603 | struct route_node *rp; |
| 3604 | struct rip_info *rinfo; |
| 3605 | |
| 3606 | if (rip) |
| 3607 | { |
| 3608 | /* Clear RIP routes */ |
| 3609 | for (rp = route_top (rip->table); rp; rp = route_next (rp)) |
| 3610 | if ((rinfo = rp->info) != NULL) |
| 3611 | { |
| 3612 | if (rinfo->type == ZEBRA_ROUTE_RIP && |
| 3613 | rinfo->sub_type == RIP_ROUTE_RTE) |
| 3614 | rip_zebra_ipv4_delete ((struct prefix_ipv4 *)&rp->p, |
| 3615 | &rinfo->nexthop, rinfo->metric); |
| 3616 | |
| 3617 | RIP_TIMER_OFF (rinfo->t_timeout); |
| 3618 | RIP_TIMER_OFF (rinfo->t_garbage_collect); |
| 3619 | |
| 3620 | rp->info = NULL; |
| 3621 | route_unlock_node (rp); |
| 3622 | |
| 3623 | rip_info_free (rinfo); |
| 3624 | } |
| 3625 | |
| 3626 | /* Cancel RIP related timers. */ |
| 3627 | RIP_TIMER_OFF (rip->t_update); |
| 3628 | RIP_TIMER_OFF (rip->t_triggered_update); |
| 3629 | RIP_TIMER_OFF (rip->t_triggered_interval); |
| 3630 | |
| 3631 | /* Cancel read thread. */ |
| 3632 | if (rip->t_read) |
| 3633 | { |
| 3634 | thread_cancel (rip->t_read); |
| 3635 | rip->t_read = NULL; |
| 3636 | } |
| 3637 | |
| 3638 | /* Close RIP socket. */ |
| 3639 | if (rip->sock >= 0) |
| 3640 | { |
| 3641 | close (rip->sock); |
| 3642 | rip->sock = -1; |
| 3643 | } |
| 3644 | |
| 3645 | /* Static RIP route configuration. */ |
| 3646 | for (rp = route_top (rip->route); rp; rp = route_next (rp)) |
| 3647 | if (rp->info) |
| 3648 | { |
| 3649 | rp->info = NULL; |
| 3650 | route_unlock_node (rp); |
| 3651 | } |
| 3652 | |
| 3653 | /* RIP neighbor configuration. */ |
| 3654 | for (rp = route_top (rip->neighbor); rp; rp = route_next (rp)) |
| 3655 | if (rp->info) |
| 3656 | { |
| 3657 | rp->info = NULL; |
| 3658 | route_unlock_node (rp); |
| 3659 | } |
| 3660 | |
| 3661 | /* Redistribute related clear. */ |
| 3662 | if (rip->default_information_route_map) |
| 3663 | free (rip->default_information_route_map); |
| 3664 | |
| 3665 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) |
| 3666 | if (rip->route_map[i].name) |
| 3667 | free (rip->route_map[i].name); |
| 3668 | |
| 3669 | XFREE (MTYPE_ROUTE_TABLE, rip->table); |
| 3670 | XFREE (MTYPE_ROUTE_TABLE, rip->route); |
| 3671 | XFREE (MTYPE_ROUTE_TABLE, rip->neighbor); |
| 3672 | |
| 3673 | XFREE (MTYPE_RIP, rip); |
| 3674 | rip = NULL; |
| 3675 | } |
| 3676 | |
| 3677 | rip_clean_network (); |
paul | 4aaff3f | 2003-06-07 01:04:45 +0000 | [diff] [blame] | 3678 | rip_passive_nondefault_clean (); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 3679 | rip_offset_clean (); |
| 3680 | rip_interface_clean (); |
| 3681 | rip_distance_reset (); |
| 3682 | rip_redistribute_clean (); |
| 3683 | } |
| 3684 | |
| 3685 | /* Reset all values to the default settings. */ |
| 3686 | void |
| 3687 | rip_reset () |
| 3688 | { |
| 3689 | /* Reset global counters. */ |
| 3690 | rip_global_route_changes = 0; |
| 3691 | rip_global_queries = 0; |
| 3692 | |
| 3693 | /* Call ripd related reset functions. */ |
| 3694 | rip_debug_reset (); |
| 3695 | rip_route_map_reset (); |
| 3696 | |
| 3697 | /* Call library reset functions. */ |
| 3698 | vty_reset (); |
| 3699 | access_list_reset (); |
| 3700 | prefix_list_reset (); |
| 3701 | |
| 3702 | distribute_list_reset (); |
| 3703 | |
| 3704 | rip_interface_reset (); |
| 3705 | rip_distance_reset (); |
| 3706 | |
| 3707 | rip_zclient_reset (); |
| 3708 | } |
| 3709 | |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 3710 | void |
| 3711 | rip_if_rmap_update (struct if_rmap *if_rmap) |
| 3712 | { |
| 3713 | struct interface *ifp; |
| 3714 | struct rip_interface *ri; |
| 3715 | struct route_map *rmap; |
| 3716 | |
| 3717 | ifp = if_lookup_by_name (if_rmap->ifname); |
| 3718 | if (ifp == NULL) |
| 3719 | return; |
| 3720 | |
| 3721 | ri = ifp->info; |
| 3722 | |
| 3723 | if (if_rmap->routemap[IF_RMAP_IN]) |
| 3724 | { |
| 3725 | rmap = route_map_lookup_by_name (if_rmap->routemap[IF_RMAP_IN]); |
| 3726 | if (rmap) |
| 3727 | ri->routemap[IF_RMAP_IN] = rmap; |
| 3728 | else |
| 3729 | ri->routemap[IF_RMAP_IN] = NULL; |
| 3730 | } |
| 3731 | else |
| 3732 | ri->routemap[RIP_FILTER_IN] = NULL; |
| 3733 | |
| 3734 | if (if_rmap->routemap[IF_RMAP_OUT]) |
| 3735 | { |
| 3736 | rmap = route_map_lookup_by_name (if_rmap->routemap[IF_RMAP_OUT]); |
| 3737 | if (rmap) |
| 3738 | ri->routemap[IF_RMAP_OUT] = rmap; |
| 3739 | else |
| 3740 | ri->routemap[IF_RMAP_OUT] = NULL; |
| 3741 | } |
| 3742 | else |
| 3743 | ri->routemap[RIP_FILTER_OUT] = NULL; |
| 3744 | } |
| 3745 | |
| 3746 | void |
| 3747 | rip_if_rmap_update_interface (struct interface *ifp) |
| 3748 | { |
| 3749 | struct if_rmap *if_rmap; |
| 3750 | |
| 3751 | if_rmap = if_rmap_lookup (ifp->name); |
| 3752 | if (if_rmap) |
| 3753 | rip_if_rmap_update (if_rmap); |
| 3754 | } |
| 3755 | |
| 3756 | void |
| 3757 | rip_routemap_update_redistribute (void) |
| 3758 | { |
| 3759 | int i; |
| 3760 | |
| 3761 | if (rip) |
| 3762 | { |
| 3763 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) |
| 3764 | { |
| 3765 | if (rip->route_map[i].name) |
| 3766 | rip->route_map[i].map = |
| 3767 | route_map_lookup_by_name (rip->route_map[i].name); |
| 3768 | } |
| 3769 | } |
| 3770 | } |
| 3771 | |
| 3772 | void |
| 3773 | rip_routemap_update () |
| 3774 | { |
| 3775 | struct interface *ifp; |
| 3776 | listnode node; |
| 3777 | |
| 3778 | for (node = listhead (iflist); node; nextnode (node)) |
| 3779 | { |
| 3780 | ifp = getdata (node); |
| 3781 | rip_if_rmap_update_interface (ifp); |
| 3782 | } |
| 3783 | |
| 3784 | rip_routemap_update_redistribute (); |
| 3785 | } |
| 3786 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 3787 | /* Allocate new rip structure and set default value. */ |
| 3788 | void |
| 3789 | rip_init () |
| 3790 | { |
| 3791 | /* Randomize for triggered update random(). */ |
| 3792 | srand (time (NULL)); |
| 3793 | |
| 3794 | /* Install top nodes. */ |
| 3795 | install_node (&rip_node, config_write_rip); |
| 3796 | |
| 3797 | /* Install rip commands. */ |
| 3798 | install_element (VIEW_NODE, &show_ip_rip_cmd); |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 3799 | install_element (VIEW_NODE, &show_ip_rip_status_cmd); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 3800 | install_element (ENABLE_NODE, &show_ip_rip_cmd); |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 3801 | install_element (ENABLE_NODE, &show_ip_rip_status_cmd); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 3802 | install_element (CONFIG_NODE, &router_rip_cmd); |
| 3803 | install_element (CONFIG_NODE, &no_router_rip_cmd); |
| 3804 | |
| 3805 | install_default (RIP_NODE); |
| 3806 | install_element (RIP_NODE, &rip_version_cmd); |
| 3807 | install_element (RIP_NODE, &no_rip_version_cmd); |
| 3808 | install_element (RIP_NODE, &no_rip_version_val_cmd); |
| 3809 | install_element (RIP_NODE, &rip_default_metric_cmd); |
| 3810 | install_element (RIP_NODE, &no_rip_default_metric_cmd); |
| 3811 | install_element (RIP_NODE, &no_rip_default_metric_val_cmd); |
| 3812 | install_element (RIP_NODE, &rip_timers_cmd); |
| 3813 | install_element (RIP_NODE, &no_rip_timers_cmd); |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 3814 | install_element (RIP_NODE, &no_rip_timers_val_cmd); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 3815 | install_element (RIP_NODE, &rip_route_cmd); |
| 3816 | install_element (RIP_NODE, &no_rip_route_cmd); |
| 3817 | install_element (RIP_NODE, &rip_distance_cmd); |
| 3818 | install_element (RIP_NODE, &no_rip_distance_cmd); |
| 3819 | install_element (RIP_NODE, &rip_distance_source_cmd); |
| 3820 | install_element (RIP_NODE, &no_rip_distance_source_cmd); |
| 3821 | install_element (RIP_NODE, &rip_distance_source_access_list_cmd); |
| 3822 | install_element (RIP_NODE, &no_rip_distance_source_access_list_cmd); |
| 3823 | |
| 3824 | /* Debug related init. */ |
| 3825 | rip_debug_init (); |
| 3826 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 3827 | /* SNMP init. */ |
| 3828 | #ifdef HAVE_SNMP |
| 3829 | rip_snmp_init (); |
| 3830 | #endif /* HAVE_SNMP */ |
| 3831 | |
| 3832 | /* Access list install. */ |
| 3833 | access_list_init (); |
| 3834 | access_list_add_hook (rip_distribute_update_all); |
| 3835 | access_list_delete_hook (rip_distribute_update_all); |
| 3836 | |
| 3837 | /* Prefix list initialize.*/ |
| 3838 | prefix_list_init (); |
| 3839 | prefix_list_add_hook (rip_distribute_update_all); |
| 3840 | prefix_list_delete_hook (rip_distribute_update_all); |
| 3841 | |
| 3842 | /* Distribute list install. */ |
| 3843 | distribute_list_init (RIP_NODE); |
| 3844 | distribute_list_add_hook (rip_distribute_update); |
| 3845 | distribute_list_delete_hook (rip_distribute_update); |
| 3846 | |
hasso | 1670513 | 2003-05-25 14:49:19 +0000 | [diff] [blame] | 3847 | /* Route-map */ |
| 3848 | rip_route_map_init (); |
| 3849 | rip_offset_init (); |
| 3850 | |
| 3851 | route_map_add_hook (rip_routemap_update); |
| 3852 | route_map_delete_hook (rip_routemap_update); |
| 3853 | |
| 3854 | if_rmap_init (RIP_NODE); |
| 3855 | if_rmap_hook_add (rip_if_rmap_update); |
| 3856 | if_rmap_hook_delete (rip_if_rmap_update); |
| 3857 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 3858 | /* Distance control. */ |
| 3859 | rip_distance_table = route_table_init (); |
| 3860 | } |