| 718e3744 |
1 | /* Routing Information Base. |
| 2 | * Copyright (C) 1997, 98, 99, 2001 Kunihiro Ishiguro |
| 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 "prefix.h" |
| 25 | #include "table.h" |
| 26 | #include "memory.h" |
| 27 | #include "str.h" |
| 28 | #include "command.h" |
| 29 | #include "if.h" |
| 30 | #include "log.h" |
| 31 | #include "sockunion.h" |
| 32 | |
| 33 | #include "zebra/rib.h" |
| 34 | #include "zebra/rt.h" |
| 35 | #include "zebra/zserv.h" |
| 36 | #include "zebra/redistribute.h" |
| 37 | #include "zebra/debug.h" |
| 38 | |
| 39 | /* Default rtm_table for all clients */ |
| 40 | extern int rtm_table_default; |
| 41 | |
| 42 | /* Each route type's string and default distance value. */ |
| 43 | struct |
| 44 | { |
| 45 | int key; |
| 46 | int distance; |
| 47 | } route_info[] = |
| 48 | { |
| 49 | {ZEBRA_ROUTE_SYSTEM, 0}, |
| 50 | {ZEBRA_ROUTE_KERNEL, 0}, |
| 51 | {ZEBRA_ROUTE_CONNECT, 0}, |
| 52 | {ZEBRA_ROUTE_STATIC, 1}, |
| 53 | {ZEBRA_ROUTE_RIP, 120}, |
| 54 | {ZEBRA_ROUTE_RIPNG, 120}, |
| 55 | {ZEBRA_ROUTE_OSPF, 110}, |
| 56 | {ZEBRA_ROUTE_OSPF6, 110}, |
| 57 | {ZEBRA_ROUTE_BGP, 20 /* IBGP is 200. */} |
| 58 | }; |
| 59 | \f |
| 60 | /* Vector for routing table. */ |
| 61 | vector vrf_vector; |
| 62 | |
| 63 | /* Allocate new VRF. */ |
| 64 | struct vrf * |
| 65 | vrf_alloc (char *name) |
| 66 | { |
| 67 | struct vrf *vrf; |
| 68 | |
| 69 | vrf = XCALLOC (MTYPE_VRF, sizeof (struct vrf)); |
| 70 | |
| 71 | /* Put name. */ |
| 72 | if (name) |
| 73 | vrf->name = XSTRDUP (MTYPE_VRF_NAME, name); |
| 74 | |
| 75 | /* Allocate routing table and static table. */ |
| 76 | vrf->table[AFI_IP][SAFI_UNICAST] = route_table_init (); |
| 77 | vrf->table[AFI_IP6][SAFI_UNICAST] = route_table_init (); |
| 78 | vrf->stable[AFI_IP][SAFI_UNICAST] = route_table_init (); |
| 79 | vrf->stable[AFI_IP6][SAFI_UNICAST] = route_table_init (); |
| 80 | |
| 81 | return vrf; |
| 82 | } |
| 83 | |
| 84 | /* Free VRF. */ |
| 85 | void |
| 86 | vrf_free (struct vrf *vrf) |
| 87 | { |
| 88 | if (vrf->name) |
| 89 | XFREE (MTYPE_VRF_NAME, vrf->name); |
| 90 | XFREE (MTYPE_VRF, vrf); |
| 91 | } |
| 92 | |
| 93 | /* Lookup VRF by identifier. */ |
| 94 | struct vrf * |
| 95 | vrf_lookup (u_int32_t id) |
| 96 | { |
| 97 | return vector_lookup (vrf_vector, id); |
| 98 | } |
| 99 | |
| 100 | /* Lookup VRF by name. */ |
| 101 | struct vrf * |
| 102 | vrf_lookup_by_name (char *name) |
| 103 | { |
| 104 | int i; |
| 105 | struct vrf *vrf; |
| 106 | |
| 107 | for (i = 0; i < vector_max (vrf_vector); i++) |
| 108 | if ((vrf = vector_slot (vrf_vector, i)) != NULL) |
| 109 | if (vrf->name && name && strcmp (vrf->name, name) == 0) |
| 110 | return vrf; |
| 111 | return NULL; |
| 112 | } |
| 113 | |
| 114 | /* Initialize VRF. */ |
| 115 | void |
| 116 | vrf_init () |
| 117 | { |
| 118 | struct vrf *default_table; |
| 119 | |
| 120 | /* Allocate VRF vector. */ |
| 121 | vrf_vector = vector_init (1); |
| 122 | |
| 123 | /* Allocate default main table. */ |
| 124 | default_table = vrf_alloc ("Default-IP-Routing-Table"); |
| 125 | |
| 126 | /* Default table index must be 0. */ |
| 127 | vector_set_index (vrf_vector, 0, default_table); |
| 128 | } |
| 129 | |
| 130 | /* Lookup route table. */ |
| 131 | struct route_table * |
| 132 | vrf_table (afi_t afi, safi_t safi, u_int32_t id) |
| 133 | { |
| 134 | struct vrf *vrf; |
| 135 | |
| 136 | vrf = vrf_lookup (id); |
| 137 | if (! vrf) |
| 138 | return NULL; |
| 139 | |
| 140 | return vrf->table[afi][safi]; |
| 141 | } |
| 142 | |
| 143 | /* Lookup static route table. */ |
| 144 | struct route_table * |
| 145 | vrf_static_table (afi_t afi, safi_t safi, u_int32_t id) |
| 146 | { |
| 147 | struct vrf *vrf; |
| 148 | |
| 149 | vrf = vrf_lookup (id); |
| 150 | if (! vrf) |
| 151 | return NULL; |
| 152 | |
| 153 | return vrf->stable[afi][safi]; |
| 154 | } |
| 155 | \f |
| 156 | /* Add nexthop to the end of the list. */ |
| 157 | void |
| 158 | nexthop_add (struct rib *rib, struct nexthop *nexthop) |
| 159 | { |
| 160 | struct nexthop *last; |
| 161 | |
| 162 | for (last = rib->nexthop; last && last->next; last = last->next) |
| 163 | ; |
| 164 | if (last) |
| 165 | last->next = nexthop; |
| 166 | else |
| 167 | rib->nexthop = nexthop; |
| 168 | nexthop->prev = last; |
| 169 | |
| 170 | rib->nexthop_num++; |
| 171 | } |
| 172 | |
| 173 | /* Delete specified nexthop from the list. */ |
| 174 | void |
| 175 | nexthop_delete (struct rib *rib, struct nexthop *nexthop) |
| 176 | { |
| 177 | if (nexthop->next) |
| 178 | nexthop->next->prev = nexthop->prev; |
| 179 | if (nexthop->prev) |
| 180 | nexthop->prev->next = nexthop->next; |
| 181 | else |
| 182 | rib->nexthop = nexthop->next; |
| 183 | rib->nexthop_num--; |
| 184 | } |
| 185 | |
| 186 | /* Free nexthop. */ |
| 187 | void |
| 188 | nexthop_free (struct nexthop *nexthop) |
| 189 | { |
| a4b70768 |
190 | if (nexthop->ifname) |
| 191 | XFREE (0, nexthop->ifname); |
| 718e3744 |
192 | XFREE (MTYPE_NEXTHOP, nexthop); |
| 193 | } |
| 194 | |
| 195 | struct nexthop * |
| 196 | nexthop_ifindex_add (struct rib *rib, unsigned int ifindex) |
| 197 | { |
| 198 | struct nexthop *nexthop; |
| 199 | |
| 200 | nexthop = XMALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
| 201 | memset (nexthop, 0, sizeof (struct nexthop)); |
| 202 | nexthop->type = NEXTHOP_TYPE_IFINDEX; |
| 203 | nexthop->ifindex = ifindex; |
| 204 | |
| 205 | nexthop_add (rib, nexthop); |
| 206 | |
| 207 | return nexthop; |
| 208 | } |
| 209 | |
| 210 | struct nexthop * |
| 211 | nexthop_ifname_add (struct rib *rib, char *ifname) |
| 212 | { |
| 213 | struct nexthop *nexthop; |
| 214 | |
| 215 | nexthop = XMALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
| 216 | memset (nexthop, 0, sizeof (struct nexthop)); |
| 217 | nexthop->type = NEXTHOP_TYPE_IFNAME; |
| a4b70768 |
218 | nexthop->ifname = XSTRDUP (0, ifname); |
| 718e3744 |
219 | |
| 220 | nexthop_add (rib, nexthop); |
| 221 | |
| 222 | return nexthop; |
| 223 | } |
| 224 | |
| 225 | struct nexthop * |
| 226 | nexthop_ipv4_add (struct rib *rib, struct in_addr *ipv4) |
| 227 | { |
| 228 | struct nexthop *nexthop; |
| 229 | |
| 230 | nexthop = XMALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
| 231 | memset (nexthop, 0, sizeof (struct nexthop)); |
| 232 | nexthop->type = NEXTHOP_TYPE_IPV4; |
| 233 | nexthop->gate.ipv4 = *ipv4; |
| 234 | |
| 235 | nexthop_add (rib, nexthop); |
| 236 | |
| 237 | return nexthop; |
| 238 | } |
| 239 | |
| 240 | struct nexthop * |
| 241 | nexthop_ipv4_ifindex_add (struct rib *rib, struct in_addr *ipv4, |
| 242 | unsigned int ifindex) |
| 243 | { |
| 244 | struct nexthop *nexthop; |
| 245 | |
| 246 | nexthop = XMALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
| 247 | memset (nexthop, 0, sizeof (struct nexthop)); |
| 248 | nexthop->type = NEXTHOP_TYPE_IPV4_IFINDEX; |
| 249 | nexthop->gate.ipv4 = *ipv4; |
| 250 | nexthop->ifindex = ifindex; |
| 251 | |
| 252 | nexthop_add (rib, nexthop); |
| 253 | |
| 254 | return nexthop; |
| 255 | } |
| 256 | |
| 257 | #ifdef HAVE_IPV6 |
| 258 | struct nexthop * |
| 259 | nexthop_ipv6_add (struct rib *rib, struct in6_addr *ipv6) |
| 260 | { |
| 261 | struct nexthop *nexthop; |
| 262 | |
| 263 | nexthop = XMALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
| 264 | memset (nexthop, 0, sizeof (struct nexthop)); |
| 265 | nexthop->type = NEXTHOP_TYPE_IPV6; |
| 266 | nexthop->gate.ipv6 = *ipv6; |
| 267 | |
| 268 | nexthop_add (rib, nexthop); |
| 269 | |
| 270 | return nexthop; |
| 271 | } |
| 272 | |
| 273 | struct nexthop * |
| 274 | nexthop_ipv6_ifname_add (struct rib *rib, struct in6_addr *ipv6, |
| 275 | char *ifname) |
| 276 | { |
| 277 | struct nexthop *nexthop; |
| 278 | |
| 279 | nexthop = XMALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
| 280 | memset (nexthop, 0, sizeof (struct nexthop)); |
| 281 | nexthop->type = NEXTHOP_TYPE_IPV6_IFNAME; |
| 282 | nexthop->gate.ipv6 = *ipv6; |
| 283 | nexthop->ifname = XSTRDUP (0, ifname); |
| 284 | |
| 285 | nexthop_add (rib, nexthop); |
| 286 | |
| 287 | return nexthop; |
| 288 | } |
| 289 | |
| 290 | struct nexthop * |
| 291 | nexthop_ipv6_ifindex_add (struct rib *rib, struct in6_addr *ipv6, |
| 292 | unsigned int ifindex) |
| 293 | { |
| 294 | struct nexthop *nexthop; |
| 295 | |
| 296 | nexthop = XMALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
| 297 | memset (nexthop, 0, sizeof (struct nexthop)); |
| 298 | nexthop->type = NEXTHOP_TYPE_IPV6_IFINDEX; |
| 299 | nexthop->gate.ipv6 = *ipv6; |
| 300 | nexthop->ifindex = ifindex; |
| 301 | |
| 302 | nexthop_add (rib, nexthop); |
| 303 | |
| 304 | return nexthop; |
| 305 | } |
| 306 | #endif /* HAVE_IPV6 */ |
| 307 | |
| 595db7f1 |
308 | struct nexthop * |
| 309 | nexthop_blackhole_add (struct rib *rib) |
| 310 | { |
| 311 | struct nexthop *nexthop; |
| 312 | |
| 313 | nexthop = XMALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
| 314 | memset (nexthop, 0, sizeof (struct nexthop)); |
| 315 | nexthop->type = NEXTHOP_TYPE_BLACKHOLE; |
| 316 | SET_FLAG (rib->flags, ZEBRA_FLAG_BLACKHOLE); |
| 317 | |
| 318 | nexthop_add (rib, nexthop); |
| 319 | |
| 320 | return nexthop; |
| 321 | } |
| 322 | |
| 718e3744 |
323 | /* If force flag is not set, do not modify falgs at all for uninstall |
| 324 | the route from FIB. */ |
| 325 | int |
| 326 | nexthop_active_ipv4 (struct rib *rib, struct nexthop *nexthop, int set, |
| 327 | struct route_node *top) |
| 328 | { |
| 329 | struct prefix_ipv4 p; |
| 330 | struct route_table *table; |
| 331 | struct route_node *rn; |
| 332 | struct rib *match; |
| 333 | struct nexthop *newhop; |
| 334 | |
| 335 | if (nexthop->type == NEXTHOP_TYPE_IPV4) |
| 336 | nexthop->ifindex = 0; |
| 337 | |
| 338 | if (set) |
| 339 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); |
| 340 | |
| 341 | /* Make lookup prefix. */ |
| 342 | memset (&p, 0, sizeof (struct prefix_ipv4)); |
| 343 | p.family = AF_INET; |
| 344 | p.prefixlen = IPV4_MAX_PREFIXLEN; |
| 345 | p.prefix = nexthop->gate.ipv4; |
| 346 | |
| 347 | /* Lookup table. */ |
| 348 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); |
| 349 | if (! table) |
| 350 | return 0; |
| 351 | |
| 352 | rn = route_node_match (table, (struct prefix *) &p); |
| 353 | while (rn) |
| 354 | { |
| 355 | route_unlock_node (rn); |
| 356 | |
| 357 | /* If lookup self prefix return immidiately. */ |
| 358 | if (rn == top) |
| 359 | return 0; |
| 360 | |
| 361 | /* Pick up selected route. */ |
| 362 | for (match = rn->info; match; match = match->next) |
| 363 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) |
| 364 | break; |
| 365 | |
| 366 | /* If there is no selected route or matched route is EGP, go up |
| 367 | tree. */ |
| 368 | if (! match |
| 369 | || match->type == ZEBRA_ROUTE_BGP) |
| 370 | { |
| 371 | do { |
| 372 | rn = rn->parent; |
| 373 | } while (rn && rn->info == NULL); |
| 374 | if (rn) |
| 375 | route_lock_node (rn); |
| 376 | } |
| 377 | else |
| 378 | { |
| 379 | if (match->type == ZEBRA_ROUTE_CONNECT) |
| 380 | { |
| 381 | /* Directly point connected route. */ |
| 382 | newhop = match->nexthop; |
| 383 | if (newhop && nexthop->type == NEXTHOP_TYPE_IPV4) |
| 384 | nexthop->ifindex = newhop->ifindex; |
| 385 | |
| 386 | return 1; |
| 387 | } |
| 388 | else if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_INTERNAL)) |
| 389 | { |
| 390 | for (newhop = match->nexthop; newhop; newhop = newhop->next) |
| 391 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB) |
| 392 | && ! CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_RECURSIVE)) |
| 393 | { |
| 394 | if (set) |
| 395 | { |
| 396 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); |
| 397 | nexthop->rtype = newhop->type; |
| 398 | if (newhop->type == NEXTHOP_TYPE_IPV4 || |
| 399 | newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX) |
| 400 | nexthop->rgate.ipv4 = newhop->gate.ipv4; |
| 401 | if (newhop->type == NEXTHOP_TYPE_IFINDEX |
| 402 | || newhop->type == NEXTHOP_TYPE_IFNAME |
| 403 | || newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX) |
| 404 | nexthop->rifindex = newhop->ifindex; |
| 405 | } |
| 406 | return 1; |
| 407 | } |
| 408 | return 0; |
| 409 | } |
| 410 | else |
| 411 | { |
| 412 | return 0; |
| 413 | } |
| 414 | } |
| 415 | } |
| 416 | return 0; |
| 417 | } |
| 418 | |
| 419 | #ifdef HAVE_IPV6 |
| 420 | /* If force flag is not set, do not modify falgs at all for uninstall |
| 421 | the route from FIB. */ |
| 422 | int |
| 423 | nexthop_active_ipv6 (struct rib *rib, struct nexthop *nexthop, int set, |
| 424 | struct route_node *top) |
| 425 | { |
| 426 | struct prefix_ipv6 p; |
| 427 | struct route_table *table; |
| 428 | struct route_node *rn; |
| 429 | struct rib *match; |
| 430 | struct nexthop *newhop; |
| 431 | |
| 432 | if (nexthop->type == NEXTHOP_TYPE_IPV6) |
| 433 | nexthop->ifindex = 0; |
| 434 | |
| 435 | if (set) |
| 436 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); |
| 437 | |
| 438 | /* Make lookup prefix. */ |
| 439 | memset (&p, 0, sizeof (struct prefix_ipv6)); |
| 440 | p.family = AF_INET6; |
| 441 | p.prefixlen = IPV6_MAX_PREFIXLEN; |
| 442 | p.prefix = nexthop->gate.ipv6; |
| 443 | |
| 444 | /* Lookup table. */ |
| 445 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); |
| 446 | if (! table) |
| 447 | return 0; |
| 448 | |
| 449 | rn = route_node_match (table, (struct prefix *) &p); |
| 450 | while (rn) |
| 451 | { |
| 452 | route_unlock_node (rn); |
| 453 | |
| 454 | /* If lookup self prefix return immidiately. */ |
| 455 | if (rn == top) |
| 456 | return 0; |
| 457 | |
| 458 | /* Pick up selected route. */ |
| 459 | for (match = rn->info; match; match = match->next) |
| 460 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) |
| 461 | break; |
| 462 | |
| 463 | /* If there is no selected route or matched route is EGP, go up |
| 464 | tree. */ |
| 465 | if (! match |
| 466 | || match->type == ZEBRA_ROUTE_BGP) |
| 467 | { |
| 468 | do { |
| 469 | rn = rn->parent; |
| 470 | } while (rn && rn->info == NULL); |
| 471 | if (rn) |
| 472 | route_lock_node (rn); |
| 473 | } |
| 474 | else |
| 475 | { |
| 476 | if (match->type == ZEBRA_ROUTE_CONNECT) |
| 477 | { |
| 478 | /* Directly point connected route. */ |
| 479 | newhop = match->nexthop; |
| 480 | |
| 481 | if (newhop && nexthop->type == NEXTHOP_TYPE_IPV6) |
| 482 | nexthop->ifindex = newhop->ifindex; |
| 483 | |
| 484 | return 1; |
| 485 | } |
| 486 | else if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_INTERNAL)) |
| 487 | { |
| 488 | for (newhop = match->nexthop; newhop; newhop = newhop->next) |
| 489 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB) |
| 490 | && ! CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_RECURSIVE)) |
| 491 | { |
| 492 | if (set) |
| 493 | { |
| 494 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); |
| 495 | nexthop->rtype = newhop->type; |
| 496 | if (newhop->type == NEXTHOP_TYPE_IPV6 |
| 497 | || newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX |
| 498 | || newhop->type == NEXTHOP_TYPE_IPV6_IFNAME) |
| 499 | nexthop->rgate.ipv6 = newhop->gate.ipv6; |
| 500 | if (newhop->type == NEXTHOP_TYPE_IFINDEX |
| 501 | || newhop->type == NEXTHOP_TYPE_IFNAME |
| 502 | || newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX |
| 503 | || newhop->type == NEXTHOP_TYPE_IPV6_IFNAME) |
| 504 | nexthop->rifindex = newhop->ifindex; |
| 505 | } |
| 506 | return 1; |
| 507 | } |
| 508 | return 0; |
| 509 | } |
| 510 | else |
| 511 | { |
| 512 | return 0; |
| 513 | } |
| 514 | } |
| 515 | } |
| 516 | return 0; |
| 517 | } |
| 518 | #endif /* HAVE_IPV6 */ |
| 519 | |
| 520 | struct rib * |
| 521 | rib_match_ipv4 (struct in_addr addr) |
| 522 | { |
| 523 | struct prefix_ipv4 p; |
| 524 | struct route_table *table; |
| 525 | struct route_node *rn; |
| 526 | struct rib *match; |
| 527 | struct nexthop *newhop; |
| 528 | |
| 529 | /* Lookup table. */ |
| 530 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); |
| 531 | if (! table) |
| 532 | return 0; |
| 533 | |
| 534 | memset (&p, 0, sizeof (struct prefix_ipv4)); |
| 535 | p.family = AF_INET; |
| 536 | p.prefixlen = IPV4_MAX_PREFIXLEN; |
| 537 | p.prefix = addr; |
| 538 | |
| 539 | rn = route_node_match (table, (struct prefix *) &p); |
| 540 | |
| 541 | while (rn) |
| 542 | { |
| 543 | route_unlock_node (rn); |
| 544 | |
| 545 | /* Pick up selected route. */ |
| 546 | for (match = rn->info; match; match = match->next) |
| 547 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) |
| 548 | break; |
| 549 | |
| 550 | /* If there is no selected route or matched route is EGP, go up |
| 551 | tree. */ |
| 552 | if (! match |
| 553 | || match->type == ZEBRA_ROUTE_BGP) |
| 554 | { |
| 555 | do { |
| 556 | rn = rn->parent; |
| 557 | } while (rn && rn->info == NULL); |
| 558 | if (rn) |
| 559 | route_lock_node (rn); |
| 560 | } |
| 561 | else |
| 562 | { |
| 563 | if (match->type == ZEBRA_ROUTE_CONNECT) |
| 564 | /* Directly point connected route. */ |
| 565 | return match; |
| 566 | else |
| 567 | { |
| 568 | for (newhop = match->nexthop; newhop; newhop = newhop->next) |
| 569 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) |
| 570 | return match; |
| 571 | return NULL; |
| 572 | } |
| 573 | } |
| 574 | } |
| 575 | return NULL; |
| 576 | } |
| 577 | |
| 578 | struct rib * |
| 579 | rib_lookup_ipv4 (struct prefix_ipv4 *p) |
| 580 | { |
| 581 | struct route_table *table; |
| 582 | struct route_node *rn; |
| 583 | struct rib *match; |
| 584 | struct nexthop *nexthop; |
| 585 | |
| 586 | /* Lookup table. */ |
| 587 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); |
| 588 | if (! table) |
| 589 | return 0; |
| 590 | |
| 591 | rn = route_node_lookup (table, (struct prefix *) p); |
| 592 | |
| 593 | /* No route for this prefix. */ |
| 594 | if (! rn) |
| 595 | return NULL; |
| 596 | |
| 597 | /* Unlock node. */ |
| 598 | route_unlock_node (rn); |
| 599 | |
| 600 | /* Pick up selected route. */ |
| 601 | for (match = rn->info; match; match = match->next) |
| 602 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) |
| 603 | break; |
| 604 | |
| 605 | if (! match || match->type == ZEBRA_ROUTE_BGP) |
| 606 | return NULL; |
| 607 | |
| 608 | if (match->type == ZEBRA_ROUTE_CONNECT) |
| 609 | return match; |
| 610 | |
| 611 | for (nexthop = match->nexthop; nexthop; nexthop = nexthop->next) |
| 612 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
| 613 | return match; |
| 614 | |
| 615 | return NULL; |
| 616 | } |
| 617 | |
| 618 | #ifdef HAVE_IPV6 |
| 619 | struct rib * |
| 620 | rib_match_ipv6 (struct in6_addr *addr) |
| 621 | { |
| 622 | struct prefix_ipv6 p; |
| 623 | struct route_table *table; |
| 624 | struct route_node *rn; |
| 625 | struct rib *match; |
| 626 | struct nexthop *newhop; |
| 627 | |
| 628 | /* Lookup table. */ |
| 629 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); |
| 630 | if (! table) |
| 631 | return 0; |
| 632 | |
| 633 | memset (&p, 0, sizeof (struct prefix_ipv6)); |
| 634 | p.family = AF_INET6; |
| 635 | p.prefixlen = IPV6_MAX_PREFIXLEN; |
| 636 | IPV6_ADDR_COPY (&p.prefix, addr); |
| 637 | |
| 638 | rn = route_node_match (table, (struct prefix *) &p); |
| 639 | |
| 640 | while (rn) |
| 641 | { |
| 642 | route_unlock_node (rn); |
| 643 | |
| 644 | /* Pick up selected route. */ |
| 645 | for (match = rn->info; match; match = match->next) |
| 646 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) |
| 647 | break; |
| 648 | |
| 649 | /* If there is no selected route or matched route is EGP, go up |
| 650 | tree. */ |
| 651 | if (! match |
| 652 | || match->type == ZEBRA_ROUTE_BGP) |
| 653 | { |
| 654 | do { |
| 655 | rn = rn->parent; |
| 656 | } while (rn && rn->info == NULL); |
| 657 | if (rn) |
| 658 | route_lock_node (rn); |
| 659 | } |
| 660 | else |
| 661 | { |
| 662 | if (match->type == ZEBRA_ROUTE_CONNECT) |
| 663 | /* Directly point connected route. */ |
| 664 | return match; |
| 665 | else |
| 666 | { |
| 667 | for (newhop = match->nexthop; newhop; newhop = newhop->next) |
| 668 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) |
| 669 | return match; |
| 670 | return NULL; |
| 671 | } |
| 672 | } |
| 673 | } |
| 674 | return NULL; |
| 675 | } |
| 676 | #endif /* HAVE_IPV6 */ |
| 677 | |
| 678 | int |
| 679 | nexthop_active_check (struct route_node *rn, struct rib *rib, |
| 680 | struct nexthop *nexthop, int set) |
| 681 | { |
| 682 | struct interface *ifp; |
| 683 | |
| 684 | switch (nexthop->type) |
| 685 | { |
| 686 | case NEXTHOP_TYPE_IFINDEX: |
| 687 | ifp = if_lookup_by_index (nexthop->ifindex); |
| 688 | if (ifp && if_is_up (ifp)) |
| 689 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
| 690 | else |
| 691 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
| 692 | break; |
| 693 | case NEXTHOP_TYPE_IFNAME: |
| 694 | case NEXTHOP_TYPE_IPV6_IFNAME: |
| 695 | ifp = if_lookup_by_name (nexthop->ifname); |
| 696 | if (ifp && if_is_up (ifp)) |
| 697 | { |
| 698 | if (set) |
| 699 | nexthop->ifindex = ifp->ifindex; |
| 700 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
| 701 | } |
| 702 | else |
| 703 | { |
| 704 | if (set) |
| 705 | nexthop->ifindex = 0; |
| 706 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
| 707 | } |
| 708 | break; |
| 709 | case NEXTHOP_TYPE_IPV4: |
| 710 | case NEXTHOP_TYPE_IPV4_IFINDEX: |
| 711 | if (nexthop_active_ipv4 (rib, nexthop, set, rn)) |
| 712 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
| 713 | else |
| 714 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
| 715 | break; |
| 716 | #ifdef HAVE_IPV6 |
| 717 | case NEXTHOP_TYPE_IPV6: |
| 718 | if (nexthop_active_ipv6 (rib, nexthop, set, rn)) |
| 719 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
| 720 | else |
| 721 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
| 722 | break; |
| 723 | case NEXTHOP_TYPE_IPV6_IFINDEX: |
| 724 | if (IN6_IS_ADDR_LINKLOCAL (&nexthop->gate.ipv6)) |
| 725 | { |
| 726 | ifp = if_lookup_by_index (nexthop->ifindex); |
| 727 | if (ifp && if_is_up (ifp)) |
| 728 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
| 729 | else |
| 730 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
| 731 | } |
| 732 | else |
| 733 | { |
| 734 | if (nexthop_active_ipv6 (rib, nexthop, set, rn)) |
| 735 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
| 736 | else |
| 737 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
| 738 | } |
| 739 | break; |
| 740 | #endif /* HAVE_IPV6 */ |
| 595db7f1 |
741 | case NEXTHOP_TYPE_BLACKHOLE: |
| 742 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
| 743 | break; |
| 718e3744 |
744 | default: |
| 745 | break; |
| 746 | } |
| 747 | return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
| 748 | } |
| 749 | |
| 750 | int |
| 751 | nexthop_active_update (struct route_node *rn, struct rib *rib, int set) |
| 752 | { |
| 753 | struct nexthop *nexthop; |
| 754 | int active; |
| 755 | |
| 756 | rib->nexthop_active_num = 0; |
| 757 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); |
| 758 | |
| 759 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) |
| 760 | { |
| 761 | active = CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
| 762 | rib->nexthop_active_num += nexthop_active_check (rn, rib, nexthop, set); |
| 763 | if (active != CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) |
| 764 | SET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); |
| 765 | } |
| 766 | return rib->nexthop_active_num; |
| 767 | } |
| 768 | \f |
| 769 | #define RIB_SYSTEM_ROUTE(R) \ |
| 770 | ((R)->type == ZEBRA_ROUTE_KERNEL || (R)->type == ZEBRA_ROUTE_CONNECT) |
| 771 | |
| 772 | void |
| 773 | newrib_free (struct rib *rib) |
| 774 | { |
| 775 | struct nexthop *nexthop; |
| 776 | struct nexthop *next; |
| 777 | |
| 778 | for (nexthop = rib->nexthop; nexthop; nexthop = next) |
| 779 | { |
| 780 | next = nexthop->next; |
| 781 | nexthop_free (nexthop); |
| 782 | } |
| 783 | XFREE (MTYPE_RIB, rib); |
| 784 | } |
| 785 | |
| 786 | void |
| 787 | rib_install_kernel (struct route_node *rn, struct rib *rib) |
| 788 | { |
| 789 | int ret = 0; |
| 790 | struct nexthop *nexthop; |
| 791 | |
| 792 | switch (PREFIX_FAMILY (&rn->p)) |
| 793 | { |
| 794 | case AF_INET: |
| 795 | ret = kernel_add_ipv4 (&rn->p, rib); |
| 796 | break; |
| 797 | #ifdef HAVE_IPV6 |
| 798 | case AF_INET6: |
| 799 | ret = kernel_add_ipv6 (&rn->p, rib); |
| 800 | break; |
| 801 | #endif /* HAVE_IPV6 */ |
| 802 | } |
| 803 | |
| 804 | if (ret < 0) |
| 805 | { |
| 806 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) |
| 807 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); |
| 808 | } |
| 809 | } |
| 810 | |
| 811 | /* Uninstall the route from kernel. */ |
| 812 | int |
| 813 | rib_uninstall_kernel (struct route_node *rn, struct rib *rib) |
| 814 | { |
| 815 | int ret = 0; |
| 816 | struct nexthop *nexthop; |
| 817 | |
| 818 | switch (PREFIX_FAMILY (&rn->p)) |
| 819 | { |
| 820 | case AF_INET: |
| 821 | ret = kernel_delete_ipv4 (&rn->p, rib); |
| 822 | break; |
| 823 | #ifdef HAVE_IPV6 |
| 824 | case AF_INET6: |
| 825 | ret = kernel_delete_ipv6 (&rn->p, rib); |
| 826 | break; |
| 827 | #endif /* HAVE_IPV6 */ |
| 828 | } |
| 829 | |
| 830 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) |
| 831 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); |
| 832 | |
| 833 | return ret; |
| 834 | } |
| 835 | |
| 836 | /* Uninstall the route from kernel. */ |
| 837 | void |
| 838 | rib_uninstall (struct route_node *rn, struct rib *rib) |
| 839 | { |
| 840 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
| 841 | { |
| 842 | redistribute_delete (&rn->p, rib); |
| 843 | if (! RIB_SYSTEM_ROUTE (rib)) |
| 844 | rib_uninstall_kernel (rn, rib); |
| 845 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_SELECTED); |
| 846 | } |
| 847 | } |
| 848 | |
| 849 | /* Core function for processing routing information base. */ |
| 850 | void |
| 851 | rib_process (struct route_node *rn, struct rib *del) |
| 852 | { |
| 853 | struct rib *rib; |
| 854 | struct rib *next; |
| 855 | struct rib *fib = NULL; |
| 856 | struct rib *select = NULL; |
| d753e9ee |
857 | int installed = 0; |
| 858 | struct nexthop *nexthop = NULL; |
| 718e3744 |
859 | |
| 860 | for (rib = rn->info; rib; rib = next) |
| 861 | { |
| 862 | next = rib->next; |
| d753e9ee |
863 | |
| 718e3744 |
864 | /* Currently installed rib. */ |
| 865 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
| 866 | fib = rib; |
| 867 | |
| 868 | /* Skip unreachable nexthop. */ |
| 869 | if (! nexthop_active_update (rn, rib, 0)) |
| 870 | continue; |
| 871 | |
| 872 | /* Infinit distance. */ |
| 873 | if (rib->distance == DISTANCE_INFINITY) |
| 874 | continue; |
| 875 | |
| 876 | /* Newly selected rib. */ |
| 877 | if (! select || rib->distance < select->distance |
| 878 | || rib->type == ZEBRA_ROUTE_CONNECT) |
| 879 | select = rib; |
| 880 | } |
| 881 | |
| 882 | /* Deleted route check. */ |
| 883 | if (del && CHECK_FLAG (del->flags, ZEBRA_FLAG_SELECTED)) |
| 884 | fib = del; |
| 885 | |
| 886 | /* Same route is selected. */ |
| 887 | if (select && select == fib) |
| 888 | { |
| 889 | if (CHECK_FLAG (select->flags, ZEBRA_FLAG_CHANGED)) |
| 890 | { |
| 891 | redistribute_delete (&rn->p, select); |
| 892 | if (! RIB_SYSTEM_ROUTE (select)) |
| 893 | rib_uninstall_kernel (rn, select); |
| 894 | |
| 895 | /* Set real nexthop. */ |
| 896 | nexthop_active_update (rn, select, 1); |
| 897 | |
| 898 | if (! RIB_SYSTEM_ROUTE (select)) |
| 899 | rib_install_kernel (rn, select); |
| 900 | redistribute_add (&rn->p, select); |
| 901 | } |
| d753e9ee |
902 | else if (! RIB_SYSTEM_ROUTE (select)) |
| 903 | { |
| 904 | /* Housekeeping code to deal with |
| 905 | race conditions in kernel with linux |
| 906 | netlink reporting interface up before IPv4 or IPv6 protocol |
| 907 | is ready to add routes. |
| 908 | This makes sure the routes are IN the kernel. |
| 909 | */ |
| 910 | |
| 911 | for (nexthop = select->nexthop; nexthop; nexthop = nexthop->next) |
| 912 | { |
| 913 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
| 914 | installed = 1; |
| 915 | } |
| 916 | if (! installed) rib_install_kernel (rn, select); |
| 917 | } |
| 718e3744 |
918 | return; |
| 919 | } |
| 920 | |
| 921 | /* Uninstall old rib from forwarding table. */ |
| 922 | if (fib) |
| 923 | { |
| 924 | redistribute_delete (&rn->p, fib); |
| 925 | if (! RIB_SYSTEM_ROUTE (fib)) |
| 926 | rib_uninstall_kernel (rn, fib); |
| 927 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); |
| 928 | |
| 929 | /* Set real nexthop. */ |
| 930 | nexthop_active_update (rn, fib, 1); |
| 931 | } |
| 932 | |
| 933 | /* Install new rib into forwarding table. */ |
| 934 | if (select) |
| 935 | { |
| 936 | /* Set real nexthop. */ |
| 937 | nexthop_active_update (rn, select, 1); |
| 938 | |
| 939 | if (! RIB_SYSTEM_ROUTE (select)) |
| 940 | rib_install_kernel (rn, select); |
| 941 | SET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); |
| 942 | redistribute_add (&rn->p, select); |
| 943 | } |
| 944 | } |
| 945 | |
| 946 | /* Add RIB to head of the route node. */ |
| 947 | void |
| 948 | rib_addnode (struct route_node *rn, struct rib *rib) |
| 949 | { |
| 950 | struct rib *head; |
| 951 | |
| 952 | head = rn->info; |
| 953 | if (head) |
| 954 | head->prev = rib; |
| 955 | rib->next = head; |
| 956 | rn->info = rib; |
| 957 | } |
| 958 | |
| 959 | void |
| 960 | rib_delnode (struct route_node *rn, struct rib *rib) |
| 961 | { |
| 962 | if (rib->next) |
| 963 | rib->next->prev = rib->prev; |
| 964 | if (rib->prev) |
| 965 | rib->prev->next = rib->next; |
| 966 | else |
| 967 | rn->info = rib->next; |
| 968 | } |
| 969 | |
| 970 | int |
| 971 | rib_add_ipv4 (int type, int flags, struct prefix_ipv4 *p, |
| 972 | struct in_addr *gate, unsigned int ifindex, u_int32_t vrf_id, |
| 973 | u_int32_t metric, u_char distance) |
| 974 | { |
| 975 | struct rib *rib; |
| 976 | struct rib *same = NULL; |
| 977 | struct route_table *table; |
| 978 | struct route_node *rn; |
| 979 | struct nexthop *nexthop; |
| 980 | |
| 981 | /* Lookup table. */ |
| 982 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); |
| 983 | if (! table) |
| 984 | return 0; |
| 985 | |
| 986 | /* Make it sure prefixlen is applied to the prefix. */ |
| 987 | apply_mask_ipv4 (p); |
| 988 | |
| 989 | /* Set default distance by route type. */ |
| 990 | if (distance == 0) |
| 991 | { |
| 992 | distance = route_info[type].distance; |
| 993 | |
| 994 | /* iBGP distance is 200. */ |
| 995 | if (type == ZEBRA_ROUTE_BGP && CHECK_FLAG (flags, ZEBRA_FLAG_IBGP)) |
| 996 | distance = 200; |
| 997 | } |
| 998 | |
| 999 | /* Lookup route node.*/ |
| 1000 | rn = route_node_get (table, (struct prefix *) p); |
| 1001 | |
| 1002 | /* If same type of route are installed, treat it as a implicit |
| 1003 | withdraw. */ |
| 1004 | for (rib = rn->info; rib; rib = rib->next) |
| 1005 | { |
| 1006 | if (rib->type == ZEBRA_ROUTE_CONNECT) |
| 1007 | { |
| 1008 | nexthop = rib->nexthop; |
| 1009 | |
| 1010 | /* Duplicate connected route comes in. */ |
| 1011 | if (rib->type == type |
| 1012 | && nexthop && nexthop->type == NEXTHOP_TYPE_IFINDEX |
| 1013 | && nexthop->ifindex == ifindex) |
| 1014 | { |
| 1015 | rib->refcnt++; |
| 1016 | return 0 ; |
| 1017 | } |
| 1018 | } |
| 1019 | else if (rib->type == type) |
| 1020 | { |
| 1021 | same = rib; |
| 1022 | rib_delnode (rn, same); |
| 1023 | route_unlock_node (rn); |
| 1024 | break; |
| 1025 | } |
| 1026 | } |
| 1027 | |
| 1028 | /* Allocate new rib structure. */ |
| 1029 | rib = XMALLOC (MTYPE_RIB, sizeof (struct rib)); |
| 1030 | memset (rib, 0, sizeof (struct rib)); |
| 1031 | rib->type = type; |
| 1032 | rib->distance = distance; |
| 1033 | rib->flags = flags; |
| 1034 | rib->metric = metric; |
| 1035 | rib->nexthop_num = 0; |
| 1036 | rib->uptime = time (NULL); |
| 1037 | |
| 1038 | /* Nexthop settings. */ |
| 1039 | if (gate) |
| 1040 | { |
| 1041 | if (ifindex) |
| 1042 | nexthop_ipv4_ifindex_add (rib, gate, ifindex); |
| 1043 | else |
| 1044 | nexthop_ipv4_add (rib, gate); |
| 1045 | } |
| 1046 | else |
| 1047 | nexthop_ifindex_add (rib, ifindex); |
| 1048 | |
| 1049 | /* If this route is kernel route, set FIB flag to the route. */ |
| 1050 | if (type == ZEBRA_ROUTE_KERNEL || type == ZEBRA_ROUTE_CONNECT) |
| 1051 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) |
| 1052 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); |
| 1053 | |
| 1054 | /* Link new rib to node.*/ |
| 1055 | rib_addnode (rn, rib); |
| 1056 | |
| 1057 | /* Process this route node. */ |
| 1058 | rib_process (rn, same); |
| 1059 | |
| 1060 | /* Free implicit route.*/ |
| 1061 | if (same) |
| 1062 | newrib_free (same); |
| 1063 | |
| 1064 | return 0; |
| 1065 | } |
| 1066 | |
| 1067 | int |
| 1068 | rib_add_ipv4_multipath (struct prefix_ipv4 *p, struct rib *rib) |
| 1069 | { |
| 1070 | struct route_table *table; |
| 1071 | struct route_node *rn; |
| 1072 | struct rib *same; |
| 1073 | struct nexthop *nexthop; |
| 1074 | |
| 1075 | /* Lookup table. */ |
| 1076 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); |
| 1077 | if (! table) |
| 1078 | return 0; |
| 1079 | |
| 1080 | /* Make it sure prefixlen is applied to the prefix. */ |
| 1081 | apply_mask_ipv4 (p); |
| 1082 | |
| 1083 | /* Set default distance by route type. */ |
| 1084 | if (rib->distance == 0) |
| 1085 | { |
| 1086 | rib->distance = route_info[rib->type].distance; |
| 1087 | |
| 1088 | /* iBGP distance is 200. */ |
| 1089 | if (rib->type == ZEBRA_ROUTE_BGP |
| 1090 | && CHECK_FLAG (rib->flags, ZEBRA_FLAG_IBGP)) |
| 1091 | rib->distance = 200; |
| 1092 | } |
| 1093 | |
| 1094 | /* Lookup route node.*/ |
| 1095 | rn = route_node_get (table, (struct prefix *) p); |
| 1096 | |
| 1097 | /* If same type of route are installed, treat it as a implicit |
| 1098 | withdraw. */ |
| 1099 | for (same = rn->info; same; same = same->next) |
| 1100 | { |
| 1101 | if (same->type == rib->type && same->table == rib->table |
| 1102 | && same->type != ZEBRA_ROUTE_CONNECT) |
| 1103 | { |
| 1104 | rib_delnode (rn, same); |
| 1105 | route_unlock_node (rn); |
| 1106 | break; |
| 1107 | } |
| 1108 | } |
| 1109 | |
| 1110 | /* If this route is kernel route, set FIB flag to the route. */ |
| 1111 | if (rib->type == ZEBRA_ROUTE_KERNEL || rib->type == ZEBRA_ROUTE_CONNECT) |
| 1112 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) |
| 1113 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); |
| 1114 | |
| 1115 | /* Link new rib to node.*/ |
| 1116 | rib_addnode (rn, rib); |
| 1117 | |
| 1118 | /* Process this route node. */ |
| 1119 | rib_process (rn, same); |
| 1120 | |
| 1121 | /* Free implicit route.*/ |
| 1122 | if (same) |
| 1123 | newrib_free (same); |
| 1124 | |
| 1125 | return 0; |
| 1126 | } |
| 1127 | |
| 1128 | int |
| 1129 | rib_delete_ipv4 (int type, int flags, struct prefix_ipv4 *p, |
| 1130 | struct in_addr *gate, unsigned int ifindex, u_int32_t vrf_id) |
| 1131 | { |
| 1132 | struct route_table *table; |
| 1133 | struct route_node *rn; |
| 1134 | struct rib *rib; |
| 1135 | struct rib *fib = NULL; |
| 1136 | struct rib *same = NULL; |
| 1137 | struct nexthop *nexthop; |
| 1138 | char buf1[BUFSIZ]; |
| 1139 | char buf2[BUFSIZ]; |
| 1140 | |
| 1141 | /* Lookup table. */ |
| 1142 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); |
| 1143 | if (! table) |
| 1144 | return 0; |
| 1145 | |
| 1146 | /* Apply mask. */ |
| 1147 | apply_mask_ipv4 (p); |
| 1148 | |
| 1149 | /* Lookup route node. */ |
| 1150 | rn = route_node_lookup (table, (struct prefix *) p); |
| 1151 | if (! rn) |
| 1152 | { |
| 1153 | if (IS_ZEBRA_DEBUG_KERNEL) |
| 1154 | { |
| 1155 | if (gate) |
| 1156 | zlog_info ("route %s/%d via %s ifindex %d doesn't exist in rib", |
| 1157 | inet_ntop (AF_INET, &p->prefix, buf1, BUFSIZ), |
| 1158 | p->prefixlen, |
| 1159 | inet_ntop (AF_INET, gate, buf2, BUFSIZ), |
| 1160 | ifindex); |
| 1161 | else |
| 1162 | zlog_info ("route %s/%d ifindex %d doesn't exist in rib", |
| 1163 | inet_ntop (AF_INET, &p->prefix, buf1, BUFSIZ), |
| 1164 | p->prefixlen, |
| 1165 | ifindex); |
| 1166 | } |
| 1167 | return ZEBRA_ERR_RTNOEXIST; |
| 1168 | } |
| 1169 | |
| 1170 | /* Lookup same type route. */ |
| 1171 | for (rib = rn->info; rib; rib = rib->next) |
| 1172 | { |
| 1173 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
| 1174 | fib = rib; |
| 1175 | |
| 1176 | if (rib->type == ZEBRA_ROUTE_CONNECT) |
| 1177 | { |
| 1178 | nexthop = rib->nexthop; |
| 1179 | |
| 1180 | if (rib->type == type |
| 1181 | && nexthop && nexthop->type == NEXTHOP_TYPE_IFINDEX |
| 1182 | && nexthop->ifindex == ifindex) |
| 1183 | { |
| 1184 | if (rib->refcnt) |
| 1185 | { |
| 1186 | rib->refcnt--; |
| 1187 | route_unlock_node (rn); |
| 1188 | route_unlock_node (rn); |
| 1189 | return 0; |
| 1190 | } |
| 1191 | same = rib; |
| 1192 | break; |
| 1193 | } |
| 1194 | } |
| 1195 | else |
| 1196 | { |
| 1197 | if (rib->type == type) |
| 1198 | { |
| 1199 | same = rib; |
| 1200 | break; |
| 1201 | } |
| 1202 | } |
| 1203 | } |
| 1204 | |
| 1205 | /* If same type of route can't be found and this message is from |
| 1206 | kernel. */ |
| 1207 | if (! same) |
| 1208 | { |
| 1209 | if (fib && type == ZEBRA_ROUTE_KERNEL) |
| 1210 | { |
| 1211 | /* Unset flags. */ |
| 1212 | for (nexthop = fib->nexthop; nexthop; nexthop = nexthop->next) |
| 1213 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); |
| 1214 | |
| 1215 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); |
| 1216 | } |
| 1217 | else |
| 1218 | { |
| 1219 | if (IS_ZEBRA_DEBUG_KERNEL) |
| 1220 | { |
| 1221 | if (gate) |
| 1222 | zlog_info ("route %s/%d via %s ifindex %d type %d doesn't exist in rib", |
| 1223 | inet_ntop (AF_INET, &p->prefix, buf1, BUFSIZ), |
| 1224 | p->prefixlen, |
| 1225 | inet_ntop (AF_INET, gate, buf2, BUFSIZ), |
| 1226 | ifindex, |
| 1227 | type); |
| 1228 | else |
| 1229 | zlog_info ("route %s/%d ifindex %d type %d doesn't exist in rib", |
| 1230 | inet_ntop (AF_INET, &p->prefix, buf1, BUFSIZ), |
| 1231 | p->prefixlen, |
| 1232 | ifindex, |
| 1233 | type); |
| 1234 | } |
| 1235 | route_unlock_node (rn); |
| 1236 | return ZEBRA_ERR_RTNOEXIST; |
| 1237 | } |
| 1238 | } |
| 1239 | |
| 1240 | if (same) |
| 1241 | rib_delnode (rn, same); |
| 1242 | |
| 1243 | /* Process changes. */ |
| 1244 | rib_process (rn, same); |
| 1245 | |
| 1246 | if (same) |
| 1247 | { |
| 1248 | newrib_free (same); |
| 1249 | route_unlock_node (rn); |
| 1250 | } |
| 1251 | |
| 1252 | route_unlock_node (rn); |
| 1253 | |
| 1254 | return 0; |
| 1255 | } |
| 1256 | \f |
| 1257 | /* Install static route into rib. */ |
| 1258 | void |
| 1259 | static_install_ipv4 (struct prefix *p, struct static_ipv4 *si) |
| 1260 | { |
| 1261 | struct rib *rib; |
| 1262 | struct route_node *rn; |
| 1263 | struct route_table *table; |
| 1264 | |
| 1265 | /* Lookup table. */ |
| 1266 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); |
| 1267 | if (! table) |
| 1268 | return; |
| 1269 | |
| 1270 | /* Lookup existing route */ |
| 1271 | rn = route_node_get (table, p); |
| 1272 | for (rib = rn->info; rib; rib = rib->next) |
| 1273 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance) |
| 1274 | break; |
| 1275 | |
| 1276 | if (rib) |
| 1277 | { |
| 1278 | /* Same distance static route is there. Update it with new |
| 1279 | nexthop. */ |
| 1280 | rib_uninstall (rn, rib); |
| 1281 | route_unlock_node (rn); |
| 1282 | |
| 1283 | switch (si->type) |
| 1284 | { |
| 1285 | case STATIC_IPV4_GATEWAY: |
| 1286 | nexthop_ipv4_add (rib, &si->gate.ipv4); |
| 1287 | break; |
| 1288 | case STATIC_IPV4_IFNAME: |
| 1289 | nexthop_ifname_add (rib, si->gate.ifname); |
| 1290 | break; |
| 595db7f1 |
1291 | case STATIC_IPV4_BLACKHOLE: |
| 1292 | nexthop_blackhole_add (rib); |
| 1293 | break; |
| 718e3744 |
1294 | } |
| 1295 | rib_process (rn, NULL); |
| 1296 | } |
| 1297 | else |
| 1298 | { |
| 1299 | /* This is new static route. */ |
| 1300 | rib = XMALLOC (MTYPE_RIB, sizeof (struct rib)); |
| 1301 | memset (rib, 0, sizeof (struct rib)); |
| 1302 | |
| 1303 | rib->type = ZEBRA_ROUTE_STATIC; |
| 1304 | rib->distance = si->distance; |
| 1305 | rib->metric = 0; |
| 1306 | rib->nexthop_num = 0; |
| 1307 | |
| 1308 | switch (si->type) |
| 1309 | { |
| 1310 | case STATIC_IPV4_GATEWAY: |
| 1311 | nexthop_ipv4_add (rib, &si->gate.ipv4); |
| 1312 | break; |
| 1313 | case STATIC_IPV4_IFNAME: |
| 1314 | nexthop_ifname_add (rib, si->gate.ifname); |
| 1315 | break; |
| 595db7f1 |
1316 | case STATIC_IPV4_BLACKHOLE: |
| 1317 | nexthop_blackhole_add (rib); |
| 1318 | break; |
| 718e3744 |
1319 | } |
| 1320 | |
| 81dfcaa2 |
1321 | /* Save the flags of this static routes (reject, blackhole) */ |
| 1322 | rib->flags = si->flags; |
| 1323 | |
| 718e3744 |
1324 | /* Link this rib to the tree. */ |
| 1325 | rib_addnode (rn, rib); |
| 1326 | |
| 1327 | /* Process this prefix. */ |
| 1328 | rib_process (rn, NULL); |
| 1329 | } |
| 1330 | } |
| 1331 | |
| 1332 | int |
| 1333 | static_ipv4_nexthop_same (struct nexthop *nexthop, struct static_ipv4 *si) |
| 1334 | { |
| 1335 | if (nexthop->type == NEXTHOP_TYPE_IPV4 |
| 1336 | && si->type == STATIC_IPV4_GATEWAY |
| 1337 | && IPV4_ADDR_SAME (&nexthop->gate.ipv4, &si->gate.ipv4)) |
| 1338 | return 1; |
| 1339 | if (nexthop->type == NEXTHOP_TYPE_IFNAME |
| 1340 | && si->type == STATIC_IPV4_IFNAME |
| 1341 | && strcmp (nexthop->ifname, si->gate.ifname) == 0) |
| 1342 | return 1; |
| 595db7f1 |
1343 | if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE |
| 1344 | && si->type == STATIC_IPV4_BLACKHOLE) |
| 1345 | return 1; |
| 718e3744 |
1346 | return 0;; |
| 1347 | } |
| 1348 | |
| 1349 | /* Uninstall static route from RIB. */ |
| 1350 | void |
| 1351 | static_uninstall_ipv4 (struct prefix *p, struct static_ipv4 *si) |
| 1352 | { |
| 1353 | struct route_node *rn; |
| 1354 | struct rib *rib; |
| 1355 | struct nexthop *nexthop; |
| 1356 | struct route_table *table; |
| 1357 | |
| 1358 | /* Lookup table. */ |
| 1359 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); |
| 1360 | if (! table) |
| 1361 | return; |
| 1362 | |
| 1363 | /* Lookup existing route with type and distance. */ |
| 1364 | rn = route_node_lookup (table, p); |
| 1365 | if (! rn) |
| 1366 | return; |
| 1367 | |
| 1368 | for (rib = rn->info; rib; rib = rib->next) |
| 1369 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance) |
| 1370 | break; |
| 1371 | |
| 1372 | if (! rib) |
| 1373 | { |
| 1374 | route_unlock_node (rn); |
| 1375 | return; |
| 1376 | } |
| 1377 | |
| 1378 | /* Lookup nexthop. */ |
| 1379 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) |
| 1380 | if (static_ipv4_nexthop_same (nexthop, si)) |
| 1381 | break; |
| 1382 | |
| 1383 | /* Can't find nexthop. */ |
| 1384 | if (! nexthop) |
| 1385 | { |
| 1386 | route_unlock_node (rn); |
| 1387 | return; |
| 1388 | } |
| 1389 | |
| 1390 | /* Check nexthop. */ |
| 1391 | if (rib->nexthop_num == 1) |
| 1392 | { |
| 1393 | rib_delnode (rn, rib); |
| 1394 | rib_process (rn, rib); |
| 1395 | newrib_free (rib); |
| 1396 | route_unlock_node (rn); |
| 1397 | } |
| 1398 | else |
| 1399 | { |
| 1400 | rib_uninstall (rn, rib); |
| 1401 | nexthop_delete (rib, nexthop); |
| 1402 | nexthop_free (nexthop); |
| 1403 | rib_process (rn, rib); |
| 1404 | } |
| 1405 | |
| 1406 | /* Unlock node. */ |
| 1407 | route_unlock_node (rn); |
| 1408 | } |
| 1409 | |
| 1410 | /* Add static route into static route configuration. */ |
| 1411 | int |
| 1412 | static_add_ipv4 (struct prefix *p, struct in_addr *gate, char *ifname, |
| 81dfcaa2 |
1413 | u_char flags, u_char distance, u_int32_t vrf_id) |
| 718e3744 |
1414 | { |
| 1415 | u_char type = 0; |
| 1416 | struct route_node *rn; |
| 1417 | struct static_ipv4 *si; |
| 1418 | struct static_ipv4 *pp; |
| 1419 | struct static_ipv4 *cp; |
| 1420 | struct static_ipv4 *update = NULL; |
| 1421 | struct route_table *stable; |
| 1422 | |
| 1423 | /* Lookup table. */ |
| 1424 | stable = vrf_static_table (AFI_IP, SAFI_UNICAST, vrf_id); |
| 1425 | if (! stable) |
| 1426 | return -1; |
| 1427 | |
| 1428 | /* Lookup static route prefix. */ |
| 1429 | rn = route_node_get (stable, p); |
| 1430 | |
| 1431 | /* Make flags. */ |
| 1432 | if (gate) |
| 1433 | type = STATIC_IPV4_GATEWAY; |
| 81dfcaa2 |
1434 | if (ifname) |
| 718e3744 |
1435 | type = STATIC_IPV4_IFNAME; |
| 595db7f1 |
1436 | else |
| 1437 | type = STATIC_IPV4_BLACKHOLE; |
| 718e3744 |
1438 | |
| 1439 | /* Do nothing if there is a same static route. */ |
| 1440 | for (si = rn->info; si; si = si->next) |
| 1441 | { |
| 1442 | if (type == si->type |
| 1443 | && (! gate || IPV4_ADDR_SAME (gate, &si->gate.ipv4)) |
| 1444 | && (! ifname || strcmp (ifname, si->gate.ifname) == 0)) |
| 1445 | { |
| 1446 | if (distance == si->distance) |
| 1447 | { |
| 1448 | route_unlock_node (rn); |
| 1449 | return 0; |
| 1450 | } |
| 1451 | else |
| 1452 | update = si; |
| 1453 | } |
| 1454 | } |
| 1455 | |
| 1456 | /* Distance chaged. */ |
| 1457 | if (update) |
| 1458 | static_delete_ipv4 (p, gate, ifname, update->distance, vrf_id); |
| 1459 | |
| 1460 | /* Make new static route structure. */ |
| 1461 | si = XMALLOC (MTYPE_STATIC_IPV4, sizeof (struct static_ipv4)); |
| 1462 | memset (si, 0, sizeof (struct static_ipv4)); |
| 1463 | |
| 1464 | si->type = type; |
| 1465 | si->distance = distance; |
| 81dfcaa2 |
1466 | si->flags = flags; |
| 718e3744 |
1467 | |
| 1468 | if (gate) |
| 1469 | si->gate.ipv4 = *gate; |
| 1470 | if (ifname) |
| 1471 | si->gate.ifname = XSTRDUP (0, ifname); |
| 1472 | |
| 1473 | /* Add new static route information to the tree with sort by |
| 1474 | distance value and gateway address. */ |
| 1475 | for (pp = NULL, cp = rn->info; cp; pp = cp, cp = cp->next) |
| 1476 | { |
| 1477 | if (si->distance < cp->distance) |
| 1478 | break; |
| 1479 | if (si->distance > cp->distance) |
| 1480 | continue; |
| 1481 | if (si->type == STATIC_IPV4_GATEWAY && cp->type == STATIC_IPV4_GATEWAY) |
| 1482 | { |
| 1483 | if (ntohl (si->gate.ipv4.s_addr) < ntohl (cp->gate.ipv4.s_addr)) |
| 1484 | break; |
| 1485 | if (ntohl (si->gate.ipv4.s_addr) > ntohl (cp->gate.ipv4.s_addr)) |
| 1486 | continue; |
| 1487 | } |
| 1488 | } |
| 1489 | |
| 1490 | /* Make linked list. */ |
| 1491 | if (pp) |
| 1492 | pp->next = si; |
| 1493 | else |
| 1494 | rn->info = si; |
| 1495 | if (cp) |
| 1496 | cp->prev = si; |
| 1497 | si->prev = pp; |
| 1498 | si->next = cp; |
| 1499 | |
| 1500 | /* Install into rib. */ |
| 1501 | static_install_ipv4 (p, si); |
| 1502 | |
| 1503 | return 1; |
| 1504 | } |
| 1505 | |
| 1506 | /* Delete static route from static route configuration. */ |
| 1507 | int |
| 1508 | static_delete_ipv4 (struct prefix *p, struct in_addr *gate, char *ifname, |
| 1509 | u_char distance, u_int32_t vrf_id) |
| 1510 | { |
| 1511 | u_char type = 0; |
| 1512 | struct route_node *rn; |
| 1513 | struct static_ipv4 *si; |
| 1514 | struct route_table *stable; |
| 1515 | |
| 1516 | /* Lookup table. */ |
| 1517 | stable = vrf_static_table (AFI_IP, SAFI_UNICAST, vrf_id); |
| 1518 | if (! stable) |
| 1519 | return -1; |
| 1520 | |
| 1521 | /* Lookup static route prefix. */ |
| 1522 | rn = route_node_lookup (stable, p); |
| 1523 | if (! rn) |
| 1524 | return 0; |
| 1525 | |
| 1526 | /* Make flags. */ |
| 1527 | if (gate) |
| 1528 | type = STATIC_IPV4_GATEWAY; |
| 1529 | else if (ifname) |
| 1530 | type = STATIC_IPV4_IFNAME; |
| 595db7f1 |
1531 | else |
| 1532 | type = STATIC_IPV4_BLACKHOLE; |
| 718e3744 |
1533 | |
| 1534 | /* Find same static route is the tree */ |
| 1535 | for (si = rn->info; si; si = si->next) |
| 1536 | if (type == si->type |
| 1537 | && (! gate || IPV4_ADDR_SAME (gate, &si->gate.ipv4)) |
| 1538 | && (! ifname || strcmp (ifname, si->gate.ifname) == 0)) |
| 1539 | break; |
| 1540 | |
| 1541 | /* Can't find static route. */ |
| 1542 | if (! si) |
| 1543 | { |
| 1544 | route_unlock_node (rn); |
| 1545 | return 0; |
| 1546 | } |
| 1547 | |
| 1548 | /* Install into rib. */ |
| 1549 | static_uninstall_ipv4 (p, si); |
| 1550 | |
| 1551 | /* Unlink static route from linked list. */ |
| 1552 | if (si->prev) |
| 1553 | si->prev->next = si->next; |
| 1554 | else |
| 1555 | rn->info = si->next; |
| 1556 | if (si->next) |
| 1557 | si->next->prev = si->prev; |
| 1558 | |
| 1559 | /* Free static route configuration. */ |
| a0f6acd8 |
1560 | if (ifname) |
| 1561 | XFREE (0, si->gate.ifname); |
| 718e3744 |
1562 | XFREE (MTYPE_STATIC_IPV4, si); |
| 1563 | |
| 1564 | return 1; |
| 1565 | } |
| 1566 | |
| 1567 | \f |
| 1568 | #ifdef HAVE_IPV6 |
| 1569 | int |
| 1570 | rib_bogus_ipv6 (int type, struct prefix_ipv6 *p, |
| 1571 | struct in6_addr *gate, unsigned int ifindex, int table) |
| 1572 | { |
| 726f9b2b |
1573 | if (type == ZEBRA_ROUTE_CONNECT && IN6_IS_ADDR_UNSPECIFIED (&p->prefix)) { |
| 1574 | #if defined (MUSICA) || defined (LINUX) |
| 1575 | /* IN6_IS_ADDR_V4COMPAT(&p->prefix) */ |
| 1576 | if (p->prefixlen == 96) |
| 1577 | return 0; |
| 1578 | #endif /* MUSICA */ |
| 718e3744 |
1579 | return 1; |
| 726f9b2b |
1580 | } |
| 718e3744 |
1581 | if (type == ZEBRA_ROUTE_KERNEL && IN6_IS_ADDR_UNSPECIFIED (&p->prefix) |
| 1582 | && p->prefixlen == 96 && gate && IN6_IS_ADDR_UNSPECIFIED (gate)) |
| 1583 | { |
| 1584 | kernel_delete_ipv6_old (p, gate, ifindex, 0, table); |
| 1585 | return 1; |
| 1586 | } |
| 1587 | return 0; |
| 1588 | } |
| 1589 | |
| 1590 | int |
| 1591 | rib_add_ipv6 (int type, int flags, struct prefix_ipv6 *p, |
| 1592 | struct in6_addr *gate, unsigned int ifindex, u_int32_t vrf_id) |
| 1593 | { |
| 1594 | struct rib *rib; |
| 1595 | struct rib *same = NULL; |
| 1596 | struct route_table *table; |
| 1597 | struct route_node *rn; |
| 1598 | struct nexthop *nexthop; |
| 1599 | |
| 1600 | int distance; |
| 1601 | u_int32_t metric = 0; |
| 1602 | |
| 1603 | /* Lookup table. */ |
| 1604 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); |
| 1605 | if (! table) |
| 1606 | return 0; |
| 1607 | |
| 1608 | /* Make sure mask is applied. */ |
| 1609 | apply_mask_ipv6 (p); |
| 1610 | |
| 1611 | /* Set default distance by route type. */ |
| 1612 | distance = route_info[type].distance; |
| 1613 | |
| 1614 | if (type == ZEBRA_ROUTE_BGP && CHECK_FLAG (flags, ZEBRA_FLAG_IBGP)) |
| 1615 | distance = 200; |
| 1616 | |
| 1617 | /* Filter bogus route. */ |
| 1618 | if (rib_bogus_ipv6 (type, p, gate, ifindex, 0)) |
| 1619 | return 0; |
| 1620 | |
| 1621 | /* Lookup route node.*/ |
| 1622 | rn = route_node_get (table, (struct prefix *) p); |
| 1623 | |
| 1624 | /* If same type of route are installed, treat it as a implicit |
| 1625 | withdraw. */ |
| 1626 | for (rib = rn->info; rib; rib = rib->next) |
| 1627 | { |
| 1628 | if (rib->type == ZEBRA_ROUTE_CONNECT) |
| 1629 | { |
| 1630 | nexthop = rib->nexthop; |
| 1631 | |
| 1632 | if (rib->type == type |
| 1633 | && nexthop && nexthop->type == NEXTHOP_TYPE_IFINDEX |
| 1634 | && nexthop->ifindex == ifindex) |
| 1635 | { |
| 1636 | rib->refcnt++; |
| 1637 | return 0; |
| 1638 | } |
| 1639 | } |
| 1640 | else if (rib->type == type) |
| 1641 | { |
| 1642 | same = rib; |
| 1643 | rib_delnode (rn, same); |
| 1644 | route_unlock_node (rn); |
| 1645 | break; |
| 1646 | } |
| 1647 | } |
| 1648 | |
| 1649 | /* Allocate new rib structure. */ |
| 1650 | rib = XMALLOC (MTYPE_RIB, sizeof (struct rib)); |
| 1651 | memset (rib, 0, sizeof (struct rib)); |
| 1652 | rib->type = type; |
| 1653 | rib->distance = distance; |
| 1654 | rib->flags = flags; |
| 1655 | rib->metric = metric; |
| 1656 | rib->nexthop_num = 0; |
| 1657 | rib->uptime = time (NULL); |
| 1658 | |
| 1659 | /* Nexthop settings. */ |
| 1660 | if (gate) |
| 1661 | { |
| 1662 | if (ifindex) |
| 1663 | nexthop_ipv6_ifindex_add (rib, gate, ifindex); |
| 1664 | else |
| 1665 | nexthop_ipv6_add (rib, gate); |
| 1666 | } |
| 1667 | else |
| 1668 | nexthop_ifindex_add (rib, ifindex); |
| 1669 | |
| 1670 | /* If this route is kernel route, set FIB flag to the route. */ |
| 1671 | if (type == ZEBRA_ROUTE_KERNEL || type == ZEBRA_ROUTE_CONNECT) |
| 1672 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) |
| 1673 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); |
| 1674 | |
| 1675 | /* Link new rib to node.*/ |
| 1676 | rib_addnode (rn, rib); |
| 1677 | |
| 1678 | /* Process this route node. */ |
| 1679 | rib_process (rn, same); |
| 1680 | |
| 1681 | /* Free implicit route.*/ |
| 1682 | if (same) |
| 1683 | newrib_free (same); |
| 1684 | |
| 1685 | return 0; |
| 1686 | } |
| 1687 | |
| 1688 | int |
| 1689 | rib_delete_ipv6 (int type, int flags, struct prefix_ipv6 *p, |
| 1690 | struct in6_addr *gate, unsigned int ifindex, u_int32_t vrf_id) |
| 1691 | { |
| 1692 | struct route_table *table; |
| 1693 | struct route_node *rn; |
| 1694 | struct rib *rib; |
| 1695 | struct rib *fib = NULL; |
| 1696 | struct rib *same = NULL; |
| 1697 | struct nexthop *nexthop; |
| 1698 | char buf1[BUFSIZ]; |
| 1699 | char buf2[BUFSIZ]; |
| 1700 | |
| 1701 | /* Apply mask. */ |
| 1702 | apply_mask_ipv6 (p); |
| 1703 | |
| 1704 | /* Lookup table. */ |
| 1705 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); |
| 1706 | if (! table) |
| 1707 | return 0; |
| 1708 | |
| 1709 | /* Lookup route node. */ |
| 1710 | rn = route_node_lookup (table, (struct prefix *) p); |
| 1711 | if (! rn) |
| 1712 | { |
| 1713 | if (IS_ZEBRA_DEBUG_KERNEL) |
| 1714 | { |
| 1715 | if (gate) |
| 1716 | zlog_info ("route %s/%d via %s ifindex %d doesn't exist in rib", |
| 1717 | inet_ntop (AF_INET6, &p->prefix, buf1, BUFSIZ), |
| 1718 | p->prefixlen, |
| 1719 | inet_ntop (AF_INET6, gate, buf2, BUFSIZ), |
| 1720 | ifindex); |
| 1721 | else |
| 1722 | zlog_info ("route %s/%d ifindex %d doesn't exist in rib", |
| 1723 | inet_ntop (AF_INET6, &p->prefix, buf1, BUFSIZ), |
| 1724 | p->prefixlen, |
| 1725 | ifindex); |
| 1726 | } |
| 1727 | return ZEBRA_ERR_RTNOEXIST; |
| 1728 | } |
| 1729 | |
| 1730 | /* Lookup same type route. */ |
| 1731 | for (rib = rn->info; rib; rib = rib->next) |
| 1732 | { |
| 1733 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
| 1734 | fib = rib; |
| 1735 | |
| 1736 | if (rib->type == ZEBRA_ROUTE_CONNECT) |
| 1737 | { |
| 1738 | nexthop = rib->nexthop; |
| 1739 | |
| 1740 | if (rib->type == type |
| 1741 | && nexthop && nexthop->type == NEXTHOP_TYPE_IFINDEX |
| 1742 | && nexthop->ifindex == ifindex) |
| 1743 | { |
| 1744 | if (rib->refcnt) |
| 1745 | { |
| 1746 | rib->refcnt--; |
| 1747 | route_unlock_node (rn); |
| 1748 | route_unlock_node (rn); |
| 1749 | return 0; |
| 1750 | } |
| 1751 | same = rib; |
| 1752 | break; |
| 1753 | } |
| 1754 | } |
| 1755 | else |
| 1756 | { |
| 1757 | if (rib->type == type) |
| 1758 | { |
| 1759 | same = rib; |
| 1760 | break; |
| 1761 | } |
| 1762 | } |
| 1763 | } |
| 1764 | |
| 1765 | /* If same type of route can't be found and this message is from |
| 1766 | kernel. */ |
| 1767 | if (! same) |
| 1768 | { |
| 1769 | if (fib && type == ZEBRA_ROUTE_KERNEL) |
| 1770 | { |
| 1771 | /* Unset flags. */ |
| 1772 | for (nexthop = fib->nexthop; nexthop; nexthop = nexthop->next) |
| 1773 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); |
| 1774 | |
| 1775 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); |
| 1776 | } |
| 1777 | else |
| 1778 | { |
| 1779 | if (IS_ZEBRA_DEBUG_KERNEL) |
| 1780 | { |
| 1781 | if (gate) |
| 1782 | zlog_info ("route %s/%d via %s ifindex %d type %d doesn't exist in rib", |
| 1783 | inet_ntop (AF_INET6, &p->prefix, buf1, BUFSIZ), |
| 1784 | p->prefixlen, |
| 1785 | inet_ntop (AF_INET6, gate, buf2, BUFSIZ), |
| 1786 | ifindex, |
| 1787 | type); |
| 1788 | else |
| 1789 | zlog_info ("route %s/%d ifindex %d type %d doesn't exist in rib", |
| 1790 | inet_ntop (AF_INET6, &p->prefix, buf1, BUFSIZ), |
| 1791 | p->prefixlen, |
| 1792 | ifindex, |
| 1793 | type); |
| 1794 | } |
| 1795 | route_unlock_node (rn); |
| 1796 | return ZEBRA_ERR_RTNOEXIST; |
| 1797 | } |
| 1798 | } |
| 1799 | |
| 1800 | if (same) |
| 1801 | rib_delnode (rn, same); |
| 1802 | |
| 1803 | /* Process changes. */ |
| 1804 | rib_process (rn, same); |
| 1805 | |
| 1806 | if (same) |
| 1807 | { |
| 1808 | newrib_free (same); |
| 1809 | route_unlock_node (rn); |
| 1810 | } |
| 1811 | |
| 1812 | route_unlock_node (rn); |
| 1813 | |
| 1814 | return 0; |
| 1815 | } |
| 1816 | \f |
| 1817 | /* Install static route into rib. */ |
| 1818 | void |
| 1819 | static_install_ipv6 (struct prefix *p, struct static_ipv6 *si) |
| 1820 | { |
| 1821 | struct rib *rib; |
| 1822 | struct route_table *table; |
| 1823 | struct route_node *rn; |
| 1824 | |
| 1825 | /* Lookup table. */ |
| 1826 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); |
| 1827 | if (! table) |
| 1828 | return; |
| 1829 | |
| 1830 | /* Lookup existing route */ |
| 1831 | rn = route_node_get (table, p); |
| 1832 | for (rib = rn->info; rib; rib = rib->next) |
| 1833 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance) |
| 1834 | break; |
| 1835 | |
| 1836 | if (rib) |
| 1837 | { |
| 1838 | /* Same distance static route is there. Update it with new |
| 1839 | nexthop. */ |
| 1840 | rib_uninstall (rn, rib); |
| 1841 | route_unlock_node (rn); |
| 1842 | |
| 1843 | switch (si->type) |
| 1844 | { |
| 1845 | case STATIC_IPV6_GATEWAY: |
| 1846 | nexthop_ipv6_add (rib, &si->ipv6); |
| 1847 | break; |
| 1848 | case STATIC_IPV6_IFNAME: |
| 1849 | nexthop_ifname_add (rib, si->ifname); |
| 1850 | break; |
| 1851 | case STATIC_IPV6_GATEWAY_IFNAME: |
| 1852 | nexthop_ipv6_ifname_add (rib, &si->ipv6, si->ifname); |
| 1853 | break; |
| 1854 | } |
| 1855 | rib_process (rn, NULL); |
| 1856 | } |
| 1857 | else |
| 1858 | { |
| 1859 | /* This is new static route. */ |
| 1860 | rib = XMALLOC (MTYPE_RIB, sizeof (struct rib)); |
| 1861 | memset (rib, 0, sizeof (struct rib)); |
| 1862 | |
| 1863 | rib->type = ZEBRA_ROUTE_STATIC; |
| 1864 | rib->distance = si->distance; |
| 1865 | rib->metric = 0; |
| 1866 | rib->nexthop_num = 0; |
| 1867 | |
| 1868 | switch (si->type) |
| 1869 | { |
| 1870 | case STATIC_IPV6_GATEWAY: |
| 1871 | nexthop_ipv6_add (rib, &si->ipv6); |
| 1872 | break; |
| 1873 | case STATIC_IPV6_IFNAME: |
| 1874 | nexthop_ifname_add (rib, si->ifname); |
| 1875 | break; |
| 1876 | case STATIC_IPV6_GATEWAY_IFNAME: |
| 1877 | nexthop_ipv6_ifname_add (rib, &si->ipv6, si->ifname); |
| 1878 | break; |
| 1879 | } |
| 1880 | |
| 81dfcaa2 |
1881 | /* Save the flags of this static routes (reject, blackhole) */ |
| 1882 | rib->flags = si->flags; |
| 1883 | |
| 718e3744 |
1884 | /* Link this rib to the tree. */ |
| 1885 | rib_addnode (rn, rib); |
| 1886 | |
| 1887 | /* Process this prefix. */ |
| 1888 | rib_process (rn, NULL); |
| 1889 | } |
| 1890 | } |
| 1891 | |
| 1892 | int |
| 1893 | static_ipv6_nexthop_same (struct nexthop *nexthop, struct static_ipv6 *si) |
| 1894 | { |
| 1895 | if (nexthop->type == NEXTHOP_TYPE_IPV6 |
| 1896 | && si->type == STATIC_IPV6_GATEWAY |
| 1897 | && IPV6_ADDR_SAME (&nexthop->gate.ipv6, &si->ipv6)) |
| 1898 | return 1; |
| 1899 | if (nexthop->type == NEXTHOP_TYPE_IFNAME |
| 1900 | && si->type == STATIC_IPV6_IFNAME |
| 1901 | && strcmp (nexthop->ifname, si->ifname) == 0) |
| 1902 | return 1; |
| 1903 | if (nexthop->type == NEXTHOP_TYPE_IPV6_IFNAME |
| 1904 | && si->type == STATIC_IPV6_GATEWAY_IFNAME |
| 1905 | && IPV6_ADDR_SAME (&nexthop->gate.ipv6, &si->ipv6) |
| 1906 | && strcmp (nexthop->ifname, si->ifname) == 0) |
| 1907 | return 1; |
| 1908 | return 0;; |
| 1909 | } |
| 1910 | |
| 1911 | void |
| 1912 | static_uninstall_ipv6 (struct prefix *p, struct static_ipv6 *si) |
| 1913 | { |
| 1914 | struct route_table *table; |
| 1915 | struct route_node *rn; |
| 1916 | struct rib *rib; |
| 1917 | struct nexthop *nexthop; |
| 1918 | |
| 1919 | /* Lookup table. */ |
| 1920 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); |
| 1921 | if (! table) |
| 1922 | return; |
| 1923 | |
| 1924 | /* Lookup existing route with type and distance. */ |
| 1925 | rn = route_node_lookup (table, (struct prefix *) p); |
| 1926 | if (! rn) |
| 1927 | return; |
| 1928 | |
| 1929 | for (rib = rn->info; rib; rib = rib->next) |
| 1930 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance) |
| 1931 | break; |
| 1932 | if (! rib) |
| 1933 | { |
| 1934 | route_unlock_node (rn); |
| 1935 | return; |
| 1936 | } |
| 1937 | |
| 1938 | /* Lookup nexthop. */ |
| 1939 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) |
| 1940 | if (static_ipv6_nexthop_same (nexthop, si)) |
| 1941 | break; |
| 1942 | |
| 1943 | /* Can't find nexthop. */ |
| 1944 | if (! nexthop) |
| 1945 | { |
| 1946 | route_unlock_node (rn); |
| 1947 | return; |
| 1948 | } |
| 1949 | |
| 1950 | /* Check nexthop. */ |
| 1951 | if (rib->nexthop_num == 1) |
| 1952 | { |
| 1953 | rib_delnode (rn, rib); |
| 1954 | rib_process (rn, rib); |
| 1955 | newrib_free (rib); |
| 1956 | route_unlock_node (rn); |
| 1957 | } |
| 1958 | else |
| 1959 | { |
| 1960 | rib_uninstall (rn, rib); |
| 1961 | nexthop_delete (rib, nexthop); |
| 1962 | nexthop_free (nexthop); |
| 1963 | rib_process (rn, rib); |
| 1964 | } |
| 1965 | |
| 1966 | /* Unlock node. */ |
| 1967 | route_unlock_node (rn); |
| 1968 | } |
| 1969 | |
| 1970 | /* Add static route into static route configuration. */ |
| 1971 | int |
| 1972 | static_add_ipv6 (struct prefix *p, u_char type, struct in6_addr *gate, |
| 81dfcaa2 |
1973 | char *ifname, u_char flags, u_char distance, u_int32_t vrf_id) |
| 718e3744 |
1974 | { |
| 1975 | struct route_node *rn; |
| 1976 | struct static_ipv6 *si; |
| 1977 | struct static_ipv6 *pp; |
| 1978 | struct static_ipv6 *cp; |
| 1979 | struct route_table *stable; |
| 1980 | |
| 1981 | /* Lookup table. */ |
| 1982 | stable = vrf_static_table (AFI_IP6, SAFI_UNICAST, vrf_id); |
| 1983 | if (! stable) |
| 1984 | return -1; |
| 1985 | |
| 1986 | /* Lookup static route prefix. */ |
| 1987 | rn = route_node_get (stable, p); |
| 1988 | |
| 1989 | /* Do nothing if there is a same static route. */ |
| 1990 | for (si = rn->info; si; si = si->next) |
| 1991 | { |
| 1992 | if (distance == si->distance |
| 1993 | && type == si->type |
| 1994 | && (! gate || IPV6_ADDR_SAME (gate, &si->ipv6)) |
| 1995 | && (! ifname || strcmp (ifname, si->ifname) == 0)) |
| 1996 | { |
| 1997 | route_unlock_node (rn); |
| 1998 | return 0; |
| 1999 | } |
| 2000 | } |
| 2001 | |
| 2002 | /* Make new static route structure. */ |
| 2003 | si = XMALLOC (MTYPE_STATIC_IPV6, sizeof (struct static_ipv6)); |
| 2004 | memset (si, 0, sizeof (struct static_ipv6)); |
| 2005 | |
| 2006 | si->type = type; |
| 2007 | si->distance = distance; |
| 81dfcaa2 |
2008 | si->flags = flags; |
| 718e3744 |
2009 | |
| 2010 | switch (type) |
| 2011 | { |
| 2012 | case STATIC_IPV6_GATEWAY: |
| 2013 | si->ipv6 = *gate; |
| 2014 | break; |
| 2015 | case STATIC_IPV6_IFNAME: |
| 2016 | si->ifname = XSTRDUP (0, ifname); |
| 2017 | break; |
| 2018 | case STATIC_IPV6_GATEWAY_IFNAME: |
| 2019 | si->ipv6 = *gate; |
| 2020 | si->ifname = XSTRDUP (0, ifname); |
| 2021 | break; |
| 2022 | } |
| 2023 | |
| 2024 | /* Add new static route information to the tree with sort by |
| 2025 | distance value and gateway address. */ |
| 2026 | for (pp = NULL, cp = rn->info; cp; pp = cp, cp = cp->next) |
| 2027 | { |
| 2028 | if (si->distance < cp->distance) |
| 2029 | break; |
| 2030 | if (si->distance > cp->distance) |
| 2031 | continue; |
| 2032 | } |
| 2033 | |
| 2034 | /* Make linked list. */ |
| 2035 | if (pp) |
| 2036 | pp->next = si; |
| 2037 | else |
| 2038 | rn->info = si; |
| 2039 | if (cp) |
| 2040 | cp->prev = si; |
| 2041 | si->prev = pp; |
| 2042 | si->next = cp; |
| 2043 | |
| 2044 | /* Install into rib. */ |
| 2045 | static_install_ipv6 (p, si); |
| 2046 | |
| 2047 | return 1; |
| 2048 | } |
| 2049 | |
| 2050 | /* Delete static route from static route configuration. */ |
| 2051 | int |
| 2052 | static_delete_ipv6 (struct prefix *p, u_char type, struct in6_addr *gate, |
| 2053 | char *ifname, u_char distance, u_int32_t vrf_id) |
| 2054 | { |
| 2055 | struct route_node *rn; |
| 2056 | struct static_ipv6 *si; |
| 2057 | struct route_table *stable; |
| 2058 | |
| 2059 | /* Lookup table. */ |
| 2060 | stable = vrf_static_table (AFI_IP6, SAFI_UNICAST, vrf_id); |
| 2061 | if (! stable) |
| 2062 | return -1; |
| 2063 | |
| 2064 | /* Lookup static route prefix. */ |
| 2065 | rn = route_node_lookup (stable, p); |
| 2066 | if (! rn) |
| 2067 | return 0; |
| 2068 | |
| 2069 | /* Find same static route is the tree */ |
| 2070 | for (si = rn->info; si; si = si->next) |
| 2071 | if (distance == si->distance |
| 2072 | && type == si->type |
| 2073 | && (! gate || IPV6_ADDR_SAME (gate, &si->ipv6)) |
| 2074 | && (! ifname || strcmp (ifname, si->ifname) == 0)) |
| 2075 | break; |
| 2076 | |
| 2077 | /* Can't find static route. */ |
| 2078 | if (! si) |
| 2079 | { |
| 2080 | route_unlock_node (rn); |
| 2081 | return 0; |
| 2082 | } |
| 2083 | |
| 2084 | /* Install into rib. */ |
| 2085 | static_uninstall_ipv6 (p, si); |
| 2086 | |
| 2087 | /* Unlink static route from linked list. */ |
| 2088 | if (si->prev) |
| 2089 | si->prev->next = si->next; |
| 2090 | else |
| 2091 | rn->info = si->next; |
| 2092 | if (si->next) |
| 2093 | si->next->prev = si->prev; |
| 2094 | |
| 2095 | /* Free static route configuration. */ |
| a0f6acd8 |
2096 | if (ifname) |
| 2097 | XFREE (0, si->ifname); |
| 718e3744 |
2098 | XFREE (MTYPE_STATIC_IPV6, si); |
| 2099 | |
| 2100 | return 1; |
| 2101 | } |
| 2102 | #endif /* HAVE_IPV6 */ |
| 2103 | \f |
| 2104 | /* RIB update function. */ |
| 2105 | void |
| 2106 | rib_update () |
| 2107 | { |
| 2108 | struct route_node *rn; |
| 2109 | struct route_table *table; |
| 2110 | |
| 2111 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); |
| 2112 | if (table) |
| 2113 | for (rn = route_top (table); rn; rn = route_next (rn)) |
| 2114 | rib_process (rn, NULL); |
| 2115 | |
| 2116 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); |
| 2117 | if (table) |
| 2118 | for (rn = route_top (table); rn; rn = route_next (rn)) |
| 2119 | rib_process (rn, NULL); |
| 2120 | } |
| 2121 | |
| 2122 | /* Interface goes up. */ |
| 2123 | void |
| 2124 | rib_if_up (struct interface *ifp) |
| 2125 | { |
| 2126 | rib_update (); |
| 2127 | } |
| 2128 | |
| 2129 | /* Interface goes down. */ |
| 2130 | void |
| 2131 | rib_if_down (struct interface *ifp) |
| 2132 | { |
| 2133 | rib_update (); |
| 2134 | } |
| 2135 | \f |
| 2136 | /* Remove all routes which comes from non main table. */ |
| 2137 | void |
| 2138 | rib_weed_table (struct route_table *table) |
| 2139 | { |
| 2140 | struct route_node *rn; |
| 2141 | struct rib *rib; |
| 2142 | struct rib *next; |
| 2143 | |
| 2144 | if (table) |
| 2145 | for (rn = route_top (table); rn; rn = route_next (rn)) |
| 2146 | for (rib = rn->info; rib; rib = next) |
| 2147 | { |
| 2148 | next = rib->next; |
| 2149 | |
| 2150 | if (rib->table != rtm_table_default && |
| 2151 | rib->table != RT_TABLE_MAIN) |
| 2152 | { |
| 2153 | rib_delnode (rn, rib); |
| 2154 | newrib_free (rib); |
| 2155 | route_unlock_node (rn); |
| 2156 | } |
| 2157 | } |
| 2158 | } |
| 2159 | |
| 2160 | /* Delete all routes from non main table. */ |
| 2161 | void |
| 2162 | rib_weed_tables () |
| 2163 | { |
| 2164 | rib_weed_table (vrf_table (AFI_IP, SAFI_UNICAST, 0)); |
| 2165 | rib_weed_table (vrf_table (AFI_IP6, SAFI_UNICAST, 0)); |
| 2166 | } |
| 2167 | \f |
| 2168 | /* Delete self installed routes after zebra is relaunched. */ |
| 2169 | void |
| 2170 | rib_sweep_table (struct route_table *table) |
| 2171 | { |
| 2172 | struct route_node *rn; |
| 2173 | struct rib *rib; |
| 2174 | struct rib *next; |
| 2175 | int ret = 0; |
| 2176 | |
| 2177 | if (table) |
| 2178 | for (rn = route_top (table); rn; rn = route_next (rn)) |
| 2179 | for (rib = rn->info; rib; rib = next) |
| 2180 | { |
| 2181 | next = rib->next; |
| 2182 | |
| 2183 | if (rib->type == ZEBRA_ROUTE_KERNEL && |
| 2184 | CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELFROUTE)) |
| 2185 | { |
| 2186 | ret = rib_uninstall_kernel (rn, rib); |
| 2187 | if (! ret) |
| 2188 | { |
| 2189 | rib_delnode (rn, rib); |
| 2190 | newrib_free (rib); |
| 2191 | route_unlock_node (rn); |
| 2192 | } |
| 2193 | } |
| 2194 | } |
| 2195 | } |
| 2196 | |
| 2197 | /* Sweep all RIB tables. */ |
| 2198 | void |
| 2199 | rib_sweep_route () |
| 2200 | { |
| 2201 | rib_sweep_table (vrf_table (AFI_IP, SAFI_UNICAST, 0)); |
| 2202 | rib_sweep_table (vrf_table (AFI_IP6, SAFI_UNICAST, 0)); |
| 2203 | } |
| 2204 | \f |
| 2205 | /* Close RIB and clean up kernel routes. */ |
| 2206 | void |
| 2207 | rib_close_table (struct route_table *table) |
| 2208 | { |
| 2209 | struct route_node *rn; |
| 2210 | struct rib *rib; |
| 2211 | |
| 2212 | if (table) |
| 2213 | for (rn = route_top (table); rn; rn = route_next (rn)) |
| 2214 | for (rib = rn->info; rib; rib = rib->next) |
| 2215 | if (! RIB_SYSTEM_ROUTE (rib) |
| 2216 | && CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
| 2217 | rib_uninstall_kernel (rn, rib); |
| 2218 | } |
| 2219 | |
| 2220 | /* Close all RIB tables. */ |
| 2221 | void |
| 2222 | rib_close () |
| 2223 | { |
| 2224 | rib_close_table (vrf_table (AFI_IP, SAFI_UNICAST, 0)); |
| 2225 | rib_close_table (vrf_table (AFI_IP6, SAFI_UNICAST, 0)); |
| 2226 | } |
| 2227 | \f |
| 2228 | /* Routing information base initialize. */ |
| 2229 | void |
| 2230 | rib_init () |
| 2231 | { |
| 2232 | /* VRF initialization. */ |
| 2233 | vrf_init (); |
| 2234 | } |
projects / mirror_frr.git / blame