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718e3744 | 1 | /* |
508e53e2 | 2 | * Copyright (C) 2003 Yasuhiro Ohara |
718e3744 | 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 | * | |
896014f4 DL |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
718e3744 | 19 | */ |
508e53e2 | 20 | |
718e3744 | 21 | /* Shortest Path First calculation for OSPFv3 */ |
22 | ||
508e53e2 | 23 | #include <zebra.h> |
718e3744 | 24 | |
508e53e2 | 25 | #include "log.h" |
26 | #include "memory.h" | |
27 | #include "command.h" | |
28 | #include "vty.h" | |
718e3744 | 29 | #include "prefix.h" |
508e53e2 | 30 | #include "linklist.h" |
31 | #include "thread.h" | |
4ba03be5 | 32 | #include "lib_errors.h" |
718e3744 | 33 | |
718e3744 | 34 | #include "ospf6_lsa.h" |
35 | #include "ospf6_lsdb.h" | |
36 | #include "ospf6_route.h" | |
508e53e2 | 37 | #include "ospf6_area.h" |
ca1f4309 DS |
38 | #include "ospf6_proto.h" |
39 | #include "ospf6_abr.h" | |
718e3744 | 40 | #include "ospf6_spf.h" |
508e53e2 | 41 | #include "ospf6_intra.h" |
718e3744 | 42 | #include "ospf6_interface.h" |
049207c3 | 43 | #include "ospf6d.h" |
1f9a9fff | 44 | #include "ospf6_abr.h" |
718e3744 | 45 | |
30043e4c DL |
46 | DEFINE_MTYPE_STATIC(OSPF6D, OSPF6_VERTEX, "OSPF6 vertex"); |
47 | ||
508e53e2 | 48 | unsigned char conf_debug_ospf6_spf = 0; |
718e3744 | 49 | |
d62a17ae | 50 | static void ospf6_spf_copy_nexthops_to_route(struct ospf6_route *rt, |
51 | struct ospf6_vertex *v) | |
c3c0ac83 | 52 | { |
d62a17ae | 53 | if (rt && v) |
54 | ospf6_copy_nexthops(rt->nh_list, v->nh_list); | |
c3c0ac83 DS |
55 | } |
56 | ||
d62a17ae | 57 | static void ospf6_spf_merge_nexthops_to_route(struct ospf6_route *rt, |
58 | struct ospf6_vertex *v) | |
c3c0ac83 | 59 | { |
d62a17ae | 60 | if (rt && v) |
61 | ospf6_merge_nexthops(rt->nh_list, v->nh_list); | |
c3c0ac83 DS |
62 | } |
63 | ||
d62a17ae | 64 | static unsigned int ospf6_spf_get_ifindex_from_nh(struct ospf6_vertex *v) |
c3c0ac83 | 65 | { |
d62a17ae | 66 | struct ospf6_nexthop *nh; |
67 | struct listnode *node; | |
68 | ||
69 | if (v) { | |
70 | node = listhead(v->nh_list); | |
71 | if (node) { | |
72 | nh = listgetdata(node); | |
73 | if (nh) | |
74 | return (nh->ifindex); | |
75 | } | |
c3c0ac83 | 76 | } |
d62a17ae | 77 | return 0; |
c3c0ac83 DS |
78 | } |
79 | ||
4ab0496e DL |
80 | static int ospf6_vertex_cmp(const struct ospf6_vertex *va, |
81 | const struct ospf6_vertex *vb) | |
718e3744 | 82 | { |
d62a17ae | 83 | /* ascending order */ |
84 | if (va->cost != vb->cost) | |
85 | return (va->cost - vb->cost); | |
4ab0496e DL |
86 | if (va->hops != vb->hops) |
87 | return (va->hops - vb->hops); | |
88 | return 0; | |
718e3744 | 89 | } |
4ab0496e | 90 | DECLARE_SKIPLIST_NONUNIQ(vertex_pqueue, struct ospf6_vertex, pqi, |
960b9a53 | 91 | ospf6_vertex_cmp); |
718e3744 | 92 | |
d62a17ae | 93 | static int ospf6_vertex_id_cmp(void *a, void *b) |
718e3744 | 94 | { |
d62a17ae | 95 | struct ospf6_vertex *va = (struct ospf6_vertex *)a; |
96 | struct ospf6_vertex *vb = (struct ospf6_vertex *)b; | |
97 | int ret = 0; | |
98 | ||
99 | ret = ntohl(ospf6_linkstate_prefix_adv_router(&va->vertex_id)) | |
100 | - ntohl(ospf6_linkstate_prefix_adv_router(&vb->vertex_id)); | |
101 | if (ret) | |
102 | return ret; | |
103 | ||
104 | ret = ntohl(ospf6_linkstate_prefix_id(&va->vertex_id)) | |
105 | - ntohl(ospf6_linkstate_prefix_id(&vb->vertex_id)); | |
106 | return ret; | |
718e3744 | 107 | } |
108 | ||
d62a17ae | 109 | static struct ospf6_vertex *ospf6_vertex_create(struct ospf6_lsa *lsa) |
718e3744 | 110 | { |
d62a17ae | 111 | struct ospf6_vertex *v; |
718e3744 | 112 | |
9f5dc319 | 113 | v = XMALLOC(MTYPE_OSPF6_VERTEX, sizeof(struct ospf6_vertex)); |
718e3744 | 114 | |
d62a17ae | 115 | /* type */ |
26e14616 | 116 | if (ntohs(lsa->header->type) == OSPF6_LSTYPE_ROUTER) { |
d62a17ae | 117 | v->type = OSPF6_VERTEX_TYPE_ROUTER; |
26e14616 CS |
118 | /* Router LSA use Link ID 0 as base in vertex_id */ |
119 | ospf6_linkstate_prefix(lsa->header->adv_router, htonl(0), | |
996c9314 | 120 | &v->vertex_id); |
26e14616 | 121 | } else if (ntohs(lsa->header->type) == OSPF6_LSTYPE_NETWORK) { |
d62a17ae | 122 | v->type = OSPF6_VERTEX_TYPE_NETWORK; |
26e14616 CS |
123 | /* vertex_id */ |
124 | ospf6_linkstate_prefix(lsa->header->adv_router, lsa->header->id, | |
996c9314 | 125 | &v->vertex_id); |
26e14616 CS |
126 | } else |
127 | assert(0); | |
718e3744 | 128 | |
d62a17ae | 129 | /* name */ |
130 | ospf6_linkstate_prefix2str(&v->vertex_id, v->name, sizeof(v->name)); | |
718e3744 | 131 | |
d62a17ae | 132 | if (IS_OSPF6_DEBUG_SPF(PROCESS)) |
26e14616 CS |
133 | zlog_debug("%s: Creating vertex %s of type %s (0x%04hx) lsa %s", |
134 | __func__, v->name, | |
d62a17ae | 135 | ((ntohs(lsa->header->type) == OSPF6_LSTYPE_ROUTER) |
136 | ? "Router" | |
996c9314 LB |
137 | : "N/W"), |
138 | ntohs(lsa->header->type), lsa->name); | |
26e14616 | 139 | |
c3c0ac83 | 140 | |
d62a17ae | 141 | /* Associated LSA */ |
142 | v->lsa = lsa; | |
718e3744 | 143 | |
d62a17ae | 144 | /* capability bits + options */ |
d7c0a89a QY |
145 | v->capability = *(uint8_t *)(OSPF6_LSA_HEADER_END(lsa->header)); |
146 | v->options[0] = *(uint8_t *)(OSPF6_LSA_HEADER_END(lsa->header) + 1); | |
147 | v->options[1] = *(uint8_t *)(OSPF6_LSA_HEADER_END(lsa->header) + 2); | |
148 | v->options[2] = *(uint8_t *)(OSPF6_LSA_HEADER_END(lsa->header) + 3); | |
718e3744 | 149 | |
d62a17ae | 150 | v->nh_list = list_new(); |
064d4355 | 151 | v->nh_list->cmp = (int (*)(void *, void *))ospf6_nexthop_cmp; |
996c9314 | 152 | v->nh_list->del = (void (*)(void *))ospf6_nexthop_delete; |
718e3744 | 153 | |
d62a17ae | 154 | v->parent = NULL; |
155 | v->child_list = list_new(); | |
156 | v->child_list->cmp = ospf6_vertex_id_cmp; | |
718e3744 | 157 | |
d62a17ae | 158 | return v; |
718e3744 | 159 | } |
160 | ||
d62a17ae | 161 | static void ospf6_vertex_delete(struct ospf6_vertex *v) |
718e3744 | 162 | { |
6a154c88 DL |
163 | list_delete(&v->nh_list); |
164 | list_delete(&v->child_list); | |
d62a17ae | 165 | XFREE(MTYPE_OSPF6_VERTEX, v); |
718e3744 | 166 | } |
167 | ||
d62a17ae | 168 | static struct ospf6_lsa *ospf6_lsdesc_lsa(caddr_t lsdesc, |
da086a3b | 169 | struct ospf6_vertex *v) |
718e3744 | 170 | { |
da086a3b | 171 | struct ospf6_lsa *lsa = NULL; |
d7c0a89a QY |
172 | uint16_t type = 0; |
173 | uint32_t id = 0, adv_router = 0; | |
d62a17ae | 174 | |
175 | if (VERTEX_IS_TYPE(NETWORK, v)) { | |
176 | type = htons(OSPF6_LSTYPE_ROUTER); | |
da086a3b | 177 | id = htonl(0); |
d62a17ae | 178 | adv_router = NETWORK_LSDESC_GET_NBR_ROUTERID(lsdesc); |
179 | } else { | |
180 | if (ROUTER_LSDESC_IS_TYPE(POINTTOPOINT, lsdesc)) { | |
181 | type = htons(OSPF6_LSTYPE_ROUTER); | |
da086a3b | 182 | id = htonl(0); |
d62a17ae | 183 | adv_router = ROUTER_LSDESC_GET_NBR_ROUTERID(lsdesc); |
184 | } else if (ROUTER_LSDESC_IS_TYPE(TRANSIT_NETWORK, lsdesc)) { | |
185 | type = htons(OSPF6_LSTYPE_NETWORK); | |
186 | id = htonl(ROUTER_LSDESC_GET_NBR_IFID(lsdesc)); | |
187 | adv_router = ROUTER_LSDESC_GET_NBR_ROUTERID(lsdesc); | |
188 | } | |
189 | } | |
190 | ||
da086a3b CS |
191 | if (type == htons(OSPF6_LSTYPE_NETWORK)) |
192 | lsa = ospf6_lsdb_lookup(type, id, adv_router, v->area->lsdb); | |
193 | else | |
194 | lsa = ospf6_create_single_router_lsa(v->area, v->area->lsdb, | |
195 | adv_router); | |
d62a17ae | 196 | if (IS_OSPF6_DEBUG_SPF(PROCESS)) { |
197 | char ibuf[16], abuf[16]; | |
198 | inet_ntop(AF_INET, &id, ibuf, sizeof(ibuf)); | |
199 | inet_ntop(AF_INET, &adv_router, abuf, sizeof(abuf)); | |
200 | if (lsa) | |
da086a3b CS |
201 | zlog_debug(" Link to: %s len %u, V %s", lsa->name, |
202 | ntohs(lsa->header->length), v->name); | |
d62a17ae | 203 | else |
da086a3b | 204 | zlog_debug(" Link to: [%s Id:%s Adv:%s] No LSA , V %s", |
26e14616 | 205 | ospf6_lstype_name(type), ibuf, abuf, |
da086a3b | 206 | v->name); |
d62a17ae | 207 | } |
208 | ||
209 | return lsa; | |
718e3744 | 210 | } |
211 | ||
d62a17ae | 212 | static char *ospf6_lsdesc_backlink(struct ospf6_lsa *lsa, caddr_t lsdesc, |
213 | struct ospf6_vertex *v) | |
718e3744 | 214 | { |
d62a17ae | 215 | caddr_t backlink, found = NULL; |
216 | int size; | |
217 | ||
218 | size = (OSPF6_LSA_IS_TYPE(ROUTER, lsa) | |
219 | ? sizeof(struct ospf6_router_lsdesc) | |
220 | : sizeof(struct ospf6_network_lsdesc)); | |
221 | for (backlink = OSPF6_LSA_HEADER_END(lsa->header) + 4; | |
222 | backlink + size <= OSPF6_LSA_END(lsa->header); backlink += size) { | |
223 | assert(!(OSPF6_LSA_IS_TYPE(NETWORK, lsa) | |
224 | && VERTEX_IS_TYPE(NETWORK, v))); | |
225 | ||
226 | if (OSPF6_LSA_IS_TYPE(NETWORK, lsa) | |
227 | && NETWORK_LSDESC_GET_NBR_ROUTERID(backlink) | |
228 | == v->lsa->header->adv_router) | |
229 | found = backlink; | |
230 | else if (VERTEX_IS_TYPE(NETWORK, v) | |
231 | && ROUTER_LSDESC_IS_TYPE(TRANSIT_NETWORK, backlink) | |
232 | && ROUTER_LSDESC_GET_NBR_ROUTERID(backlink) | |
233 | == v->lsa->header->adv_router | |
234 | && ROUTER_LSDESC_GET_NBR_IFID(backlink) | |
235 | == ntohl(v->lsa->header->id)) | |
236 | found = backlink; | |
237 | else { | |
238 | if (!ROUTER_LSDESC_IS_TYPE(POINTTOPOINT, backlink) | |
239 | || !ROUTER_LSDESC_IS_TYPE(POINTTOPOINT, lsdesc)) | |
240 | continue; | |
241 | if (ROUTER_LSDESC_GET_NBR_IFID(backlink) | |
242 | != ROUTER_LSDESC_GET_IFID(lsdesc) | |
243 | || ROUTER_LSDESC_GET_NBR_IFID(lsdesc) | |
244 | != ROUTER_LSDESC_GET_IFID(backlink)) | |
245 | continue; | |
246 | if (ROUTER_LSDESC_GET_NBR_ROUTERID(backlink) | |
247 | != v->lsa->header->adv_router | |
248 | || ROUTER_LSDESC_GET_NBR_ROUTERID(lsdesc) | |
249 | != lsa->header->adv_router) | |
250 | continue; | |
251 | found = backlink; | |
252 | } | |
253 | } | |
254 | ||
255 | if (IS_OSPF6_DEBUG_SPF(PROCESS)) | |
1ba43456 CS |
256 | zlog_debug("Vertex %s Lsa %s Backlink %s", v->name, lsa->name, |
257 | (found ? "OK" : "FAIL")); | |
d62a17ae | 258 | |
259 | return found; | |
718e3744 | 260 | } |
261 | ||
d62a17ae | 262 | static void ospf6_nexthop_calc(struct ospf6_vertex *w, struct ospf6_vertex *v, |
beadc736 | 263 | caddr_t lsdesc, struct ospf6 *ospf6) |
718e3744 | 264 | { |
d62a17ae | 265 | int i; |
266 | ifindex_t ifindex; | |
267 | struct ospf6_interface *oi; | |
d7c0a89a QY |
268 | uint16_t type; |
269 | uint32_t adv_router; | |
d62a17ae | 270 | struct ospf6_lsa *lsa; |
271 | struct ospf6_link_lsa *link_lsa; | |
272 | char buf[64]; | |
273 | ||
274 | assert(VERTEX_IS_TYPE(ROUTER, w)); | |
275 | ifindex = (VERTEX_IS_TYPE(NETWORK, v) ? ospf6_spf_get_ifindex_from_nh(v) | |
276 | : ROUTER_LSDESC_GET_IFID(lsdesc)); | |
277 | if (ifindex == 0) { | |
1c50c1c0 QY |
278 | flog_err(EC_LIB_DEVELOPMENT, "No nexthop ifindex at vertex %s", |
279 | v->name); | |
d62a17ae | 280 | return; |
281 | } | |
282 | ||
c5d28568 | 283 | oi = ospf6_interface_lookup_by_ifindex(ifindex, ospf6->vrf_id); |
d62a17ae | 284 | if (oi == NULL) { |
285 | if (IS_OSPF6_DEBUG_SPF(PROCESS)) | |
286 | zlog_debug("Can't find interface in SPF: ifindex %d", | |
287 | ifindex); | |
288 | return; | |
289 | } | |
290 | ||
291 | type = htons(OSPF6_LSTYPE_LINK); | |
292 | adv_router = (VERTEX_IS_TYPE(NETWORK, v) | |
293 | ? NETWORK_LSDESC_GET_NBR_ROUTERID(lsdesc) | |
294 | : ROUTER_LSDESC_GET_NBR_ROUTERID(lsdesc)); | |
295 | ||
296 | i = 0; | |
297 | for (ALL_LSDB_TYPED_ADVRTR(oi->lsdb, type, adv_router, lsa)) { | |
298 | if (VERTEX_IS_TYPE(ROUTER, v) | |
299 | && htonl(ROUTER_LSDESC_GET_NBR_IFID(lsdesc)) | |
300 | != lsa->header->id) | |
301 | continue; | |
302 | ||
303 | link_lsa = (struct ospf6_link_lsa *)OSPF6_LSA_HEADER_END( | |
304 | lsa->header); | |
305 | if (IS_OSPF6_DEBUG_SPF(PROCESS)) { | |
306 | inet_ntop(AF_INET6, &link_lsa->linklocal_addr, buf, | |
307 | sizeof(buf)); | |
308 | zlog_debug(" nexthop %s from %s", buf, lsa->name); | |
309 | } | |
310 | ||
311 | ospf6_add_nexthop(w->nh_list, ifindex, | |
312 | &link_lsa->linklocal_addr); | |
313 | i++; | |
314 | } | |
315 | ||
316 | if (i == 0 && IS_OSPF6_DEBUG_SPF(PROCESS)) | |
317 | zlog_debug("No nexthop for %s found", w->name); | |
718e3744 | 318 | } |
319 | ||
d62a17ae | 320 | static int ospf6_spf_install(struct ospf6_vertex *v, |
e285b70d | 321 | struct ospf6_route_table *result_table) |
718e3744 | 322 | { |
d62a17ae | 323 | struct ospf6_route *route, *parent_route; |
324 | struct ospf6_vertex *prev; | |
325 | ||
326 | if (IS_OSPF6_DEBUG_SPF(PROCESS)) | |
26e14616 CS |
327 | zlog_debug("SPF install %s (lsa %s) hops %d cost %d", v->name, |
328 | v->lsa->name, v->hops, v->cost); | |
d62a17ae | 329 | |
330 | route = ospf6_route_lookup(&v->vertex_id, result_table); | |
331 | if (route && route->path.cost < v->cost) { | |
332 | if (IS_OSPF6_DEBUG_SPF(PROCESS)) | |
333 | zlog_debug( | |
334 | " already installed with lower cost (%d), ignore", | |
335 | route->path.cost); | |
336 | ospf6_vertex_delete(v); | |
337 | return -1; | |
338 | } else if (route && route->path.cost == v->cost) { | |
2dbe669b | 339 | if (IS_OSPF6_DEBUG_SPF(PROCESS)) |
996c9314 | 340 | zlog_debug( |
2dbe669b DA |
341 | " another path found to route %pFX lsa %s, merge", |
342 | &route->prefix, v->lsa->name); | |
d62a17ae | 343 | ospf6_spf_merge_nexthops_to_route(route, v); |
344 | ||
345 | prev = (struct ospf6_vertex *)route->route_option; | |
346 | assert(prev->hops <= v->hops); | |
d62a17ae | 347 | |
996c9314 LB |
348 | if ((VERTEX_IS_TYPE(ROUTER, v) |
349 | && route->path.origin.id != v->lsa->header->id)) { | |
26e14616 | 350 | if (IS_OSPF6_DEBUG_SPF(PROCESS)) { |
996c9314 LB |
351 | zlog_debug( |
352 | "%s: V lsa %s id %u, route id %u are different", | |
15569c58 | 353 | __func__, v->lsa->name, |
996c9314 LB |
354 | ntohl(v->lsa->header->id), |
355 | ntohl(route->path.origin.id)); | |
26e14616 CS |
356 | } |
357 | return 0; | |
358 | } | |
359 | ||
360 | ospf6_vertex_delete(v); | |
d62a17ae | 361 | return -1; |
c3c0ac83 | 362 | } |
508e53e2 | 363 | |
d62a17ae | 364 | /* There should be no case where candidate being installed (variable |
365 | "v") is closer than the one in the SPF tree (variable "route"). | |
366 | In the case something has gone wrong with the behavior of | |
367 | Priority-Queue. */ | |
368 | ||
369 | /* the case where the route exists already is handled and returned | |
370 | up to here. */ | |
371 | assert(route == NULL); | |
372 | ||
373 | route = ospf6_route_create(); | |
374 | memcpy(&route->prefix, &v->vertex_id, sizeof(struct prefix)); | |
375 | route->type = OSPF6_DEST_TYPE_LINKSTATE; | |
376 | route->path.type = OSPF6_PATH_TYPE_INTRA; | |
377 | route->path.origin.type = v->lsa->header->type; | |
378 | route->path.origin.id = v->lsa->header->id; | |
379 | route->path.origin.adv_router = v->lsa->header->adv_router; | |
380 | route->path.metric_type = 1; | |
381 | route->path.cost = v->cost; | |
382 | route->path.u.cost_e2 = v->hops; | |
383 | route->path.router_bits = v->capability; | |
384 | route->path.options[0] = v->options[0]; | |
385 | route->path.options[1] = v->options[1]; | |
386 | route->path.options[2] = v->options[2]; | |
387 | ||
388 | ospf6_spf_copy_nexthops_to_route(route, v); | |
389 | ||
390 | /* | |
391 | * The SPF logic implementation does not transfer the multipathing | |
392 | * properties | |
393 | * of a parent to a child node. Thus if there was a 3-way multipath to a | |
394 | * node's parent and a single hop from the parent to the child, the | |
395 | * logic of | |
396 | * creating new vertices and computing next hops prevents there from | |
397 | * being 3 | |
398 | * paths to the child node. This is primarily because the resolution of | |
399 | * multipath is done in this routine, not in the main spf loop. | |
400 | * | |
401 | * The following logic addresses that problem by merging the parent's | |
402 | * nexthop | |
403 | * information with the child's, if the parent is not the root of the | |
404 | * tree. | |
405 | * This is based on the assumption that before a node's route is | |
406 | * installed, | |
407 | * its parent's route's nexthops have already been installed. | |
408 | */ | |
409 | if (v->parent && v->parent->hops) { | |
410 | parent_route = | |
411 | ospf6_route_lookup(&v->parent->vertex_id, result_table); | |
412 | if (parent_route) { | |
413 | ospf6_route_merge_nexthops(route, parent_route); | |
414 | } | |
415 | } | |
416 | ||
417 | if (v->parent) | |
418 | listnode_add_sort(v->parent->child_list, v); | |
419 | route->route_option = v; | |
508e53e2 | 420 | |
e285b70d | 421 | ospf6_route_add(route, result_table); |
d62a17ae | 422 | return 0; |
718e3744 | 423 | } |
424 | ||
e285b70d | 425 | void ospf6_spf_table_finish(struct ospf6_route_table *result_table) |
718e3744 | 426 | { |
d62a17ae | 427 | struct ospf6_route *route, *nroute; |
428 | struct ospf6_vertex *v; | |
429 | for (route = ospf6_route_head(result_table); route; route = nroute) { | |
430 | nroute = ospf6_route_next(route); | |
431 | v = (struct ospf6_vertex *)route->route_option; | |
432 | ospf6_vertex_delete(v); | |
e285b70d | 433 | ospf6_route_remove(route, result_table); |
d62a17ae | 434 | } |
718e3744 | 435 | } |
436 | ||
1958143e MR |
437 | static const char *const ospf6_spf_reason_str[] = {"R+", "R-", "N+", "N-", "L+", |
438 | "L-", "R*", "N*", "C"}; | |
d62a17ae | 439 | |
440 | void ospf6_spf_reason_string(unsigned int reason, char *buf, int size) | |
a0edf674 | 441 | { |
d62a17ae | 442 | unsigned int bit; |
443 | int len = 0; | |
444 | ||
445 | if (!buf) | |
446 | return; | |
447 | ||
448 | for (bit = 0; bit < array_size(ospf6_spf_reason_str); bit++) { | |
449 | if ((reason & (1 << bit)) && (len < size)) { | |
450 | len += snprintf((buf + len), (size - len), "%s%s", | |
451 | (len > 0) ? ", " : "", | |
452 | ospf6_spf_reason_str[bit]); | |
453 | } | |
a0edf674 | 454 | } |
a0edf674 DD |
455 | } |
456 | ||
6452df09 | 457 | /* RFC2328 16.1. Calculating the shortest-path tree for an area */ |
458 | /* RFC2740 3.8.1. Calculating the shortest path tree for an area */ | |
d7c0a89a | 459 | void ospf6_spf_calculation(uint32_t router_id, |
d62a17ae | 460 | struct ospf6_route_table *result_table, |
461 | struct ospf6_area *oa) | |
508e53e2 | 462 | { |
4ab0496e | 463 | struct vertex_pqueue_head candidate_list; |
d62a17ae | 464 | struct ospf6_vertex *root, *v, *w; |
465 | int size; | |
466 | caddr_t lsdesc; | |
da086a3b | 467 | struct ospf6_lsa *lsa; |
d62a17ae | 468 | struct in6_addr address; |
469 | ||
e285b70d | 470 | ospf6_spf_table_finish(result_table); |
d62a17ae | 471 | |
472 | /* Install the calculating router itself as the root of the SPF tree */ | |
473 | /* construct root vertex */ | |
da086a3b | 474 | lsa = ospf6_create_single_router_lsa(oa, oa->lsdb_self, router_id); |
d62a17ae | 475 | if (lsa == NULL) { |
476 | if (IS_OSPF6_DEBUG_SPF(PROCESS)) | |
9165c5f5 | 477 | zlog_debug("%s: No router LSA for area %s", __func__, |
d62a17ae | 478 | oa->name); |
479 | return; | |
480 | } | |
481 | ||
482 | /* initialize */ | |
4ab0496e | 483 | vertex_pqueue_init(&candidate_list); |
d62a17ae | 484 | |
485 | root = ospf6_vertex_create(lsa); | |
486 | root->area = oa; | |
487 | root->cost = 0; | |
488 | root->hops = 0; | |
26e14616 | 489 | root->link_id = lsa->header->id; |
d62a17ae | 490 | inet_pton(AF_INET6, "::1", &address); |
491 | ||
492 | /* Actually insert root to the candidate-list as the only candidate */ | |
4ab0496e | 493 | vertex_pqueue_add(&candidate_list, root); |
d62a17ae | 494 | |
495 | /* Iterate until candidate-list becomes empty */ | |
4ab0496e | 496 | while ((v = vertex_pqueue_pop(&candidate_list))) { |
d62a17ae | 497 | /* installing may result in merging or rejecting of the vertex |
498 | */ | |
e285b70d | 499 | if (ospf6_spf_install(v, result_table) < 0) |
d62a17ae | 500 | continue; |
501 | ||
502 | /* Skip overloaded routers */ | |
503 | if ((OSPF6_LSA_IS_TYPE(ROUTER, v->lsa) | |
504 | && ospf6_router_is_stub_router(v->lsa))) | |
505 | continue; | |
506 | ||
da086a3b CS |
507 | /* For each LS description in the just-added vertex V's LSA */ |
508 | size = (VERTEX_IS_TYPE(ROUTER, v) | |
509 | ? sizeof(struct ospf6_router_lsdesc) | |
510 | : sizeof(struct ospf6_network_lsdesc)); | |
511 | for (lsdesc = OSPF6_LSA_HEADER_END(v->lsa->header) + 4; | |
512 | lsdesc + size <= OSPF6_LSA_END(v->lsa->header); | |
513 | lsdesc += size) { | |
514 | lsa = ospf6_lsdesc_lsa(lsdesc, v); | |
515 | if (lsa == NULL) | |
516 | continue; | |
517 | ||
518 | if (OSPF6_LSA_IS_MAXAGE(lsa)) | |
519 | continue; | |
520 | ||
521 | if (!ospf6_lsdesc_backlink(lsa, lsdesc, v)) | |
522 | continue; | |
523 | ||
524 | w = ospf6_vertex_create(lsa); | |
525 | w->area = oa; | |
526 | w->parent = v; | |
527 | if (VERTEX_IS_TYPE(ROUTER, v)) { | |
528 | w->cost = v->cost | |
26e14616 | 529 | + ROUTER_LSDESC_GET_METRIC(lsdesc); |
da086a3b CS |
530 | w->hops = |
531 | v->hops | |
532 | + (VERTEX_IS_TYPE(NETWORK, w) ? 0 : 1); | |
533 | } else { | |
534 | /* NETWORK */ | |
535 | w->cost = v->cost; | |
536 | w->hops = v->hops + 1; | |
537 | } | |
538 | ||
539 | /* nexthop calculation */ | |
540 | if (w->hops == 0) | |
541 | ospf6_add_nexthop( | |
542 | w->nh_list, | |
d62a17ae | 543 | ROUTER_LSDESC_GET_IFID(lsdesc), NULL); |
da086a3b | 544 | else if (w->hops == 1 && v->hops == 0) |
beadc736 | 545 | ospf6_nexthop_calc(w, v, lsdesc, oa->ospf6); |
da086a3b CS |
546 | else |
547 | ospf6_copy_nexthops(w->nh_list, v->nh_list); | |
548 | ||
549 | ||
550 | /* add new candidate to the candidate_list */ | |
551 | if (IS_OSPF6_DEBUG_SPF(PROCESS)) | |
552 | zlog_debug( | |
d62a17ae | 553 | " New candidate: %s hops %d cost %d", |
996c9314 | 554 | w->name, w->hops, w->cost); |
4ab0496e | 555 | vertex_pqueue_add(&candidate_list, w); |
d62a17ae | 556 | } |
557 | } | |
558 | ||
4ab0496e | 559 | //vertex_pqueue_fini(&candidate_list); |
d62a17ae | 560 | |
da086a3b CS |
561 | ospf6_remove_temp_router_lsa(oa); |
562 | ||
d62a17ae | 563 | oa->spf_calculation++; |
718e3744 | 564 | } |
565 | ||
d62a17ae | 566 | static void ospf6_spf_log_database(struct ospf6_area *oa) |
2680aa2b | 567 | { |
d62a17ae | 568 | char *p, *end, buffer[256]; |
569 | struct listnode *node; | |
570 | struct ospf6_interface *oi; | |
571 | ||
572 | p = buffer; | |
573 | end = buffer + sizeof(buffer); | |
574 | ||
575 | snprintf(p, end - p, "SPF on DB (#LSAs):"); | |
576 | p = (buffer + strlen(buffer) < end ? buffer + strlen(buffer) : end); | |
577 | snprintf(p, end - p, " Area %s: %d", oa->name, oa->lsdb->count); | |
578 | p = (buffer + strlen(buffer) < end ? buffer + strlen(buffer) : end); | |
579 | ||
580 | for (ALL_LIST_ELEMENTS_RO(oa->if_list, node, oi)) { | |
581 | snprintf(p, end - p, " I/F %s: %d", oi->interface->name, | |
582 | oi->lsdb->count); | |
583 | p = (buffer + strlen(buffer) < end ? buffer + strlen(buffer) | |
584 | : end); | |
585 | } | |
586 | ||
587 | zlog_debug("%s", buffer); | |
2680aa2b | 588 | } |
589 | ||
d62a17ae | 590 | static int ospf6_spf_calculation_thread(struct thread *t) |
718e3744 | 591 | { |
d62a17ae | 592 | struct ospf6_area *oa; |
593 | struct ospf6 *ospf6; | |
594 | struct timeval start, end, runtime; | |
595 | struct listnode *node; | |
596 | int areas_processed = 0; | |
597 | char rbuf[32]; | |
598 | ||
599 | ospf6 = (struct ospf6 *)THREAD_ARG(t); | |
600 | ospf6->t_spf_calc = NULL; | |
601 | ||
602 | /* execute SPF calculation */ | |
603 | monotime(&start); | |
ab0f1135 | 604 | ospf6->ts_spf = start; |
d62a17ae | 605 | |
606 | if (ospf6_is_router_abr(ospf6)) | |
607 | ospf6_abr_range_reset_cost(ospf6); | |
608 | ||
609 | for (ALL_LIST_ELEMENTS_RO(ospf6->area_list, node, oa)) { | |
610 | ||
611 | if (oa == ospf6->backbone) | |
612 | continue; | |
613 | ||
ab0f1135 | 614 | monotime(&oa->ts_spf); |
d62a17ae | 615 | if (IS_OSPF6_DEBUG_SPF(PROCESS)) |
616 | zlog_debug("SPF calculation for Area %s", oa->name); | |
617 | if (IS_OSPF6_DEBUG_SPF(DATABASE)) | |
618 | ospf6_spf_log_database(oa); | |
619 | ||
620 | ospf6_spf_calculation(ospf6->router_id, oa->spf_table, oa); | |
621 | ospf6_intra_route_calculation(oa); | |
622 | ospf6_intra_brouter_calculation(oa); | |
623 | ||
624 | areas_processed++; | |
625 | } | |
626 | ||
627 | if (ospf6->backbone) { | |
ab0f1135 | 628 | monotime(&ospf6->backbone->ts_spf); |
d62a17ae | 629 | if (IS_OSPF6_DEBUG_SPF(PROCESS)) |
630 | zlog_debug("SPF calculation for Backbone area %s", | |
631 | ospf6->backbone->name); | |
632 | if (IS_OSPF6_DEBUG_SPF(DATABASE)) | |
633 | ospf6_spf_log_database(ospf6->backbone); | |
634 | ||
635 | ospf6_spf_calculation(ospf6->router_id, | |
636 | ospf6->backbone->spf_table, | |
637 | ospf6->backbone); | |
638 | ospf6_intra_route_calculation(ospf6->backbone); | |
639 | ospf6_intra_brouter_calculation(ospf6->backbone); | |
640 | areas_processed++; | |
641 | } | |
642 | ||
643 | if (ospf6_is_router_abr(ospf6)) | |
644 | ospf6_abr_defaults_to_stub(ospf6); | |
645 | ||
646 | monotime(&end); | |
647 | timersub(&end, &start, &runtime); | |
648 | ||
649 | ospf6->ts_spf_duration = runtime; | |
650 | ||
651 | ospf6_spf_reason_string(ospf6->spf_reason, rbuf, sizeof(rbuf)); | |
652 | ||
653 | if (IS_OSPF6_DEBUG_SPF(PROCESS) || IS_OSPF6_DEBUG_SPF(TIME)) | |
1bc19a9e DS |
654 | zlog_debug( |
655 | "SPF processing: # Areas: %d, SPF runtime: %lld sec %lld usec, Reason: %s", | |
656 | areas_processed, (long long)runtime.tv_sec, | |
657 | (long long)runtime.tv_usec, rbuf); | |
ab0f1135 | 658 | |
d62a17ae | 659 | ospf6->last_spf_reason = ospf6->spf_reason; |
660 | ospf6_reset_spf_reason(ospf6); | |
661 | return 0; | |
718e3744 | 662 | } |
663 | ||
3810e06e DD |
664 | /* Add schedule for SPF calculation. To avoid frequenst SPF calc, we |
665 | set timer for SPF calc. */ | |
d62a17ae | 666 | void ospf6_spf_schedule(struct ospf6 *ospf6, unsigned int reason) |
718e3744 | 667 | { |
d62a17ae | 668 | unsigned long delay, elapsed, ht; |
669 | ||
cac84a16 | 670 | /* OSPF instance does not exist. */ |
671 | if (ospf6 == NULL) | |
672 | return; | |
673 | ||
d62a17ae | 674 | ospf6_set_spf_reason(ospf6, reason); |
675 | ||
676 | if (IS_OSPF6_DEBUG_SPF(PROCESS) || IS_OSPF6_DEBUG_SPF(TIME)) { | |
677 | char rbuf[32]; | |
678 | ospf6_spf_reason_string(reason, rbuf, sizeof(rbuf)); | |
679 | zlog_debug("SPF: calculation timer scheduled (reason %s)", | |
680 | rbuf); | |
681 | } | |
682 | ||
d62a17ae | 683 | /* SPF calculation timer is already scheduled. */ |
684 | if (ospf6->t_spf_calc) { | |
685 | if (IS_OSPF6_DEBUG_SPF(PROCESS) || IS_OSPF6_DEBUG_SPF(TIME)) | |
686 | zlog_debug( | |
687 | "SPF: calculation timer is already scheduled: %p", | |
688 | (void *)ospf6->t_spf_calc); | |
689 | return; | |
690 | } | |
691 | ||
692 | elapsed = monotime_since(&ospf6->ts_spf, NULL) / 1000LL; | |
693 | ht = ospf6->spf_holdtime * ospf6->spf_hold_multiplier; | |
694 | ||
695 | if (ht > ospf6->spf_max_holdtime) | |
696 | ht = ospf6->spf_max_holdtime; | |
697 | ||
698 | /* Get SPF calculation delay time. */ | |
699 | if (elapsed < ht) { | |
700 | /* Got an event within the hold time of last SPF. We need to | |
701 | * increase the hold_multiplier, if it's not already at/past | |
702 | * maximum value, and wasn't already increased.. | |
703 | */ | |
704 | if (ht < ospf6->spf_max_holdtime) | |
705 | ospf6->spf_hold_multiplier++; | |
706 | ||
707 | /* always honour the SPF initial delay */ | |
708 | if ((ht - elapsed) < ospf6->spf_delay) | |
709 | delay = ospf6->spf_delay; | |
710 | else | |
711 | delay = ht - elapsed; | |
712 | } else { | |
713 | /* Event is past required hold-time of last SPF */ | |
714 | delay = ospf6->spf_delay; | |
715 | ospf6->spf_hold_multiplier = 1; | |
716 | } | |
717 | ||
718 | if (IS_OSPF6_DEBUG_SPF(PROCESS) || IS_OSPF6_DEBUG_SPF(TIME)) | |
1bc19a9e | 719 | zlog_debug("SPF: Rescheduling in %ld msec", delay); |
d62a17ae | 720 | |
721 | ospf6->t_spf_calc = NULL; | |
722 | thread_add_timer_msec(master, ospf6_spf_calculation_thread, ospf6, | |
723 | delay, &ospf6->t_spf_calc); | |
718e3744 | 724 | } |
725 | ||
d62a17ae | 726 | void ospf6_spf_display_subtree(struct vty *vty, const char *prefix, int rest, |
305b639b YR |
727 | struct ospf6_vertex *v, json_object *json_obj, |
728 | bool use_json) | |
718e3744 | 729 | { |
d62a17ae | 730 | struct listnode *node, *nnode; |
731 | struct ospf6_vertex *c; | |
732 | char *next_prefix; | |
733 | int len; | |
734 | int restnum; | |
305b639b YR |
735 | json_object *json_childs = NULL; |
736 | json_object *json_child = NULL; | |
d62a17ae | 737 | |
305b639b YR |
738 | if (use_json) { |
739 | json_childs = json_object_new_object(); | |
740 | json_object_int_add(json_obj, "cost", v->cost); | |
741 | } else { | |
742 | /* "prefix" is the space prefix of the display line */ | |
743 | vty_out(vty, "%s+-%s [%d]\n", prefix, v->name, v->cost); | |
744 | } | |
d62a17ae | 745 | |
746 | len = strlen(prefix) + 4; | |
747 | next_prefix = (char *)malloc(len); | |
748 | if (next_prefix == NULL) { | |
749 | vty_out(vty, "malloc failed\n"); | |
750 | return; | |
751 | } | |
752 | snprintf(next_prefix, len, "%s%s", prefix, (rest ? "| " : " ")); | |
753 | ||
754 | restnum = listcount(v->child_list); | |
755 | for (ALL_LIST_ELEMENTS(v->child_list, node, nnode, c)) { | |
305b639b YR |
756 | if (use_json) |
757 | json_child = json_object_new_object(); | |
758 | else | |
759 | restnum--; | |
d62a17ae | 760 | |
305b639b YR |
761 | ospf6_spf_display_subtree(vty, next_prefix, restnum, c, |
762 | json_child, use_json); | |
763 | ||
764 | if (use_json) | |
765 | json_object_object_add(json_childs, c->name, | |
766 | json_child); | |
767 | } | |
768 | if (use_json) { | |
769 | json_object_boolean_add(json_obj, "isLeafNode", | |
770 | !listcount(v->child_list)); | |
771 | if (listcount(v->child_list)) | |
772 | json_object_object_add(json_obj, "children", | |
773 | json_childs); | |
774 | else | |
775 | json_object_free(json_childs); | |
776 | } | |
d62a17ae | 777 | free(next_prefix); |
718e3744 | 778 | } |
779 | ||
3b68735f | 780 | DEFUN (debug_ospf6_spf_process, |
781 | debug_ospf6_spf_process_cmd, | |
782 | "debug ospf6 spf process", | |
508e53e2 | 783 | DEBUG_STR |
784 | OSPF6_STR | |
785 | "Debug SPF Calculation\n" | |
3b68735f | 786 | "Debug Detailed SPF Process\n" |
508e53e2 | 787 | ) |
718e3744 | 788 | { |
d62a17ae | 789 | unsigned char level = 0; |
790 | level = OSPF6_DEBUG_SPF_PROCESS; | |
791 | OSPF6_DEBUG_SPF_ON(level); | |
792 | return CMD_SUCCESS; | |
718e3744 | 793 | } |
794 | ||
3b68735f | 795 | DEFUN (debug_ospf6_spf_time, |
796 | debug_ospf6_spf_time_cmd, | |
797 | "debug ospf6 spf time", | |
508e53e2 | 798 | DEBUG_STR |
718e3744 | 799 | OSPF6_STR |
508e53e2 | 800 | "Debug SPF Calculation\n" |
3b68735f | 801 | "Measure time taken by SPF Calculation\n" |
508e53e2 | 802 | ) |
718e3744 | 803 | { |
d62a17ae | 804 | unsigned char level = 0; |
805 | level = OSPF6_DEBUG_SPF_TIME; | |
806 | OSPF6_DEBUG_SPF_ON(level); | |
807 | return CMD_SUCCESS; | |
718e3744 | 808 | } |
809 | ||
2680aa2b | 810 | DEFUN (debug_ospf6_spf_database, |
811 | debug_ospf6_spf_database_cmd, | |
812 | "debug ospf6 spf database", | |
813 | DEBUG_STR | |
814 | OSPF6_STR | |
815 | "Debug SPF Calculation\n" | |
816 | "Log number of LSAs at SPF Calculation time\n" | |
817 | ) | |
818 | { | |
d62a17ae | 819 | unsigned char level = 0; |
820 | level = OSPF6_DEBUG_SPF_DATABASE; | |
821 | OSPF6_DEBUG_SPF_ON(level); | |
822 | return CMD_SUCCESS; | |
2680aa2b | 823 | } |
824 | ||
3b68735f | 825 | DEFUN (no_debug_ospf6_spf_process, |
826 | no_debug_ospf6_spf_process_cmd, | |
827 | "no debug ospf6 spf process", | |
508e53e2 | 828 | NO_STR |
829 | DEBUG_STR | |
830 | OSPF6_STR | |
831 | "Quit Debugging SPF Calculation\n" | |
3b68735f | 832 | "Quit Debugging Detailed SPF Process\n" |
508e53e2 | 833 | ) |
718e3744 | 834 | { |
d62a17ae | 835 | unsigned char level = 0; |
836 | level = OSPF6_DEBUG_SPF_PROCESS; | |
837 | OSPF6_DEBUG_SPF_OFF(level); | |
838 | return CMD_SUCCESS; | |
718e3744 | 839 | } |
840 | ||
3b68735f | 841 | DEFUN (no_debug_ospf6_spf_time, |
842 | no_debug_ospf6_spf_time_cmd, | |
843 | "no debug ospf6 spf time", | |
508e53e2 | 844 | NO_STR |
845 | DEBUG_STR | |
718e3744 | 846 | OSPF6_STR |
508e53e2 | 847 | "Quit Debugging SPF Calculation\n" |
3b68735f | 848 | "Quit Measuring time taken by SPF Calculation\n" |
508e53e2 | 849 | ) |
718e3744 | 850 | { |
d62a17ae | 851 | unsigned char level = 0; |
852 | level = OSPF6_DEBUG_SPF_TIME; | |
853 | OSPF6_DEBUG_SPF_OFF(level); | |
854 | return CMD_SUCCESS; | |
718e3744 | 855 | } |
856 | ||
2680aa2b | 857 | DEFUN (no_debug_ospf6_spf_database, |
858 | no_debug_ospf6_spf_database_cmd, | |
859 | "no debug ospf6 spf database", | |
860 | NO_STR | |
861 | DEBUG_STR | |
862 | OSPF6_STR | |
863 | "Debug SPF Calculation\n" | |
864 | "Quit Logging number of LSAs at SPF Calculation time\n" | |
865 | ) | |
866 | { | |
d62a17ae | 867 | unsigned char level = 0; |
868 | level = OSPF6_DEBUG_SPF_DATABASE; | |
869 | OSPF6_DEBUG_SPF_OFF(level); | |
870 | return CMD_SUCCESS; | |
2680aa2b | 871 | } |
872 | ||
d62a17ae | 873 | static int ospf6_timers_spf_set(struct vty *vty, unsigned int delay, |
874 | unsigned int hold, unsigned int max) | |
3810e06e | 875 | { |
d62a17ae | 876 | VTY_DECLVAR_CONTEXT(ospf6, ospf); |
3810e06e | 877 | |
d62a17ae | 878 | ospf->spf_delay = delay; |
879 | ospf->spf_holdtime = hold; | |
880 | ospf->spf_max_holdtime = max; | |
3810e06e | 881 | |
d62a17ae | 882 | return CMD_SUCCESS; |
3810e06e DD |
883 | } |
884 | ||
885 | DEFUN (ospf6_timers_throttle_spf, | |
886 | ospf6_timers_throttle_spf_cmd, | |
6147e2c6 | 887 | "timers throttle spf (0-600000) (0-600000) (0-600000)", |
3810e06e DD |
888 | "Adjust routing timers\n" |
889 | "Throttling adaptive timer\n" | |
890 | "OSPF6 SPF timers\n" | |
891 | "Delay (msec) from first change received till SPF calculation\n" | |
892 | "Initial hold time (msec) between consecutive SPF calculations\n" | |
893 | "Maximum hold time (msec)\n") | |
894 | { | |
d62a17ae | 895 | int idx_number = 3; |
896 | int idx_number_2 = 4; | |
897 | int idx_number_3 = 5; | |
898 | unsigned int delay, hold, max; | |
3810e06e | 899 | |
d62a17ae | 900 | delay = strtoul(argv[idx_number]->arg, NULL, 10); |
901 | hold = strtoul(argv[idx_number_2]->arg, NULL, 10); | |
902 | max = strtoul(argv[idx_number_3]->arg, NULL, 10); | |
3810e06e | 903 | |
d62a17ae | 904 | return ospf6_timers_spf_set(vty, delay, hold, max); |
3810e06e DD |
905 | } |
906 | ||
907 | DEFUN (no_ospf6_timers_throttle_spf, | |
908 | no_ospf6_timers_throttle_spf_cmd, | |
1d68dbfe | 909 | "no timers throttle spf [(0-600000) (0-600000) (0-600000)]", |
3810e06e DD |
910 | NO_STR |
911 | "Adjust routing timers\n" | |
912 | "Throttling adaptive timer\n" | |
1d68dbfe DW |
913 | "OSPF6 SPF timers\n" |
914 | "Delay (msec) from first change received till SPF calculation\n" | |
915 | "Initial hold time (msec) between consecutive SPF calculations\n" | |
916 | "Maximum hold time (msec)\n") | |
3810e06e | 917 | { |
d62a17ae | 918 | return ospf6_timers_spf_set(vty, OSPF_SPF_DELAY_DEFAULT, |
919 | OSPF_SPF_HOLDTIME_DEFAULT, | |
920 | OSPF_SPF_MAX_HOLDTIME_DEFAULT); | |
3810e06e DD |
921 | } |
922 | ||
813d4307 | 923 | |
d62a17ae | 924 | int config_write_ospf6_debug_spf(struct vty *vty) |
718e3744 | 925 | { |
d62a17ae | 926 | if (IS_OSPF6_DEBUG_SPF(PROCESS)) |
927 | vty_out(vty, "debug ospf6 spf process\n"); | |
928 | if (IS_OSPF6_DEBUG_SPF(TIME)) | |
929 | vty_out(vty, "debug ospf6 spf time\n"); | |
930 | if (IS_OSPF6_DEBUG_SPF(DATABASE)) | |
931 | vty_out(vty, "debug ospf6 spf database\n"); | |
932 | return 0; | |
718e3744 | 933 | } |
934 | ||
beadc736 | 935 | void ospf6_spf_config_write(struct vty *vty, struct ospf6 *ospf6) |
3810e06e DD |
936 | { |
937 | ||
d62a17ae | 938 | if (ospf6->spf_delay != OSPF_SPF_DELAY_DEFAULT |
939 | || ospf6->spf_holdtime != OSPF_SPF_HOLDTIME_DEFAULT | |
940 | || ospf6->spf_max_holdtime != OSPF_SPF_MAX_HOLDTIME_DEFAULT) | |
941 | vty_out(vty, " timers throttle spf %d %d %d\n", | |
942 | ospf6->spf_delay, ospf6->spf_holdtime, | |
943 | ospf6->spf_max_holdtime); | |
3810e06e DD |
944 | } |
945 | ||
d62a17ae | 946 | void install_element_ospf6_debug_spf(void) |
508e53e2 | 947 | { |
d62a17ae | 948 | install_element(ENABLE_NODE, &debug_ospf6_spf_process_cmd); |
949 | install_element(ENABLE_NODE, &debug_ospf6_spf_time_cmd); | |
950 | install_element(ENABLE_NODE, &debug_ospf6_spf_database_cmd); | |
951 | install_element(ENABLE_NODE, &no_debug_ospf6_spf_process_cmd); | |
952 | install_element(ENABLE_NODE, &no_debug_ospf6_spf_time_cmd); | |
953 | install_element(ENABLE_NODE, &no_debug_ospf6_spf_database_cmd); | |
954 | install_element(CONFIG_NODE, &debug_ospf6_spf_process_cmd); | |
955 | install_element(CONFIG_NODE, &debug_ospf6_spf_time_cmd); | |
956 | install_element(CONFIG_NODE, &debug_ospf6_spf_database_cmd); | |
957 | install_element(CONFIG_NODE, &no_debug_ospf6_spf_process_cmd); | |
958 | install_element(CONFIG_NODE, &no_debug_ospf6_spf_time_cmd); | |
959 | install_element(CONFIG_NODE, &no_debug_ospf6_spf_database_cmd); | |
508e53e2 | 960 | } |
718e3744 | 961 | |
d62a17ae | 962 | void ospf6_spf_init(void) |
718e3744 | 963 | { |
d62a17ae | 964 | install_element(OSPF6_NODE, &ospf6_timers_throttle_spf_cmd); |
965 | install_element(OSPF6_NODE, &no_ospf6_timers_throttle_spf_cmd); | |
718e3744 | 966 | } |
da086a3b CS |
967 | |
968 | /* Create Aggregated Large Router-LSA from multiple Link-State IDs | |
969 | * RFC 5340 A 4.3: | |
970 | * When more than one router-LSA is received from a single router, | |
971 | * the links are processed as if concatenated into a single LSA.*/ | |
972 | struct ospf6_lsa *ospf6_create_single_router_lsa(struct ospf6_area *area, | |
973 | struct ospf6_lsdb *lsdb, | |
974 | uint32_t adv_router) | |
975 | { | |
976 | struct ospf6_lsa *lsa = NULL; | |
977 | struct ospf6_lsa *rtr_lsa = NULL; | |
978 | struct ospf6_lsa_header *lsa_header = NULL; | |
979 | uint8_t *new_header = NULL; | |
980 | const struct route_node *end = NULL; | |
981 | uint16_t lsa_length, total_lsa_length = 0, num_lsa = 0; | |
d7c0a89a | 982 | uint16_t type = 0; |
da086a3b CS |
983 | char ifbuf[16]; |
984 | uint32_t interface_id; | |
985 | caddr_t lsd; | |
986 | ||
996c9314 LB |
987 | lsa_length = sizeof(struct ospf6_lsa_header) |
988 | + sizeof(struct ospf6_router_lsa); | |
da086a3b CS |
989 | total_lsa_length = lsa_length; |
990 | type = htons(OSPF6_LSTYPE_ROUTER); | |
991 | ||
992 | /* First check Aggregated LSA formed earlier in Cache */ | |
993 | lsa = ospf6_lsdb_lookup(type, htonl(0), adv_router, | |
994 | area->temp_router_lsa_lsdb); | |
995 | if (lsa) | |
996 | return lsa; | |
997 | ||
998 | inet_ntop(AF_INET, &adv_router, ifbuf, sizeof(ifbuf)); | |
999 | ||
1000 | /* Determine total LSA length from all link state ids */ | |
1001 | end = ospf6_lsdb_head(lsdb, 2, type, adv_router, &rtr_lsa); | |
1002 | while (rtr_lsa) { | |
1003 | lsa = rtr_lsa; | |
1004 | if (OSPF6_LSA_IS_MAXAGE(rtr_lsa)) { | |
1005 | rtr_lsa = ospf6_lsdb_next(end, rtr_lsa); | |
1006 | continue; | |
1007 | } | |
c4efd0f4 | 1008 | lsa_header = rtr_lsa->header; |
996c9314 | 1009 | total_lsa_length += (ntohs(lsa_header->length) - lsa_length); |
da086a3b CS |
1010 | num_lsa++; |
1011 | rtr_lsa = ospf6_lsdb_next(end, rtr_lsa); | |
1012 | } | |
1013 | if (IS_OSPF6_DEBUG_SPF(PROCESS)) | |
15569c58 DA |
1014 | zlog_debug("%s: adv_router %s num_lsa %u to convert.", __func__, |
1015 | ifbuf, num_lsa); | |
da086a3b CS |
1016 | if (num_lsa == 1) |
1017 | return lsa; | |
1018 | ||
1019 | if (num_lsa == 0) { | |
1020 | if (IS_OSPF6_DEBUG_SPF(PROCESS)) | |
1021 | zlog_debug("%s: adv_router %s not found in LSDB.", | |
15569c58 | 1022 | __func__, ifbuf); |
da086a3b CS |
1023 | return NULL; |
1024 | } | |
1025 | ||
771e1fbe DL |
1026 | lsa = ospf6_lsa_alloc(total_lsa_length); |
1027 | new_header = (uint8_t *)lsa->header; | |
da086a3b CS |
1028 | |
1029 | lsa->lsdb = area->temp_router_lsa_lsdb; | |
1030 | ||
1031 | /* Fill Larger LSA Payload */ | |
1032 | end = ospf6_lsdb_head(lsdb, 2, type, adv_router, &rtr_lsa); | |
cf29dab3 DS |
1033 | |
1034 | /* | |
1035 | * We assume at this point in time that rtr_lsa is | |
1036 | * a valid pointer. | |
1037 | */ | |
1038 | assert(rtr_lsa); | |
1039 | if (!OSPF6_LSA_IS_MAXAGE(rtr_lsa)) { | |
1040 | /* Append first Link State ID LSA */ | |
c4efd0f4 | 1041 | lsa_header = rtr_lsa->header; |
cf29dab3 DS |
1042 | memcpy(new_header, lsa_header, ntohs(lsa_header->length)); |
1043 | /* Assign new lsa length as aggregated length. */ | |
1044 | ((struct ospf6_lsa_header *)new_header)->length = | |
1045 | htons(total_lsa_length); | |
1046 | new_header += ntohs(lsa_header->length); | |
1047 | num_lsa--; | |
da086a3b CS |
1048 | } |
1049 | ||
1050 | /* Print LSA Name */ | |
1051 | ospf6_lsa_printbuf(lsa, lsa->name, sizeof(lsa->name)); | |
1052 | ||
1053 | rtr_lsa = ospf6_lsdb_next(end, rtr_lsa); | |
1054 | while (rtr_lsa) { | |
1055 | if (OSPF6_LSA_IS_MAXAGE(rtr_lsa)) { | |
1056 | rtr_lsa = ospf6_lsdb_next(end, rtr_lsa); | |
1057 | continue; | |
1058 | } | |
1059 | ||
1060 | if (IS_OSPF6_DEBUG_SPF(PROCESS)) { | |
1061 | lsd = OSPF6_LSA_HEADER_END(rtr_lsa->header) + 4; | |
1062 | interface_id = ROUTER_LSDESC_GET_IFID(lsd); | |
1063 | inet_ntop(AF_INET, &interface_id, ifbuf, sizeof(ifbuf)); | |
996c9314 LB |
1064 | zlog_debug( |
1065 | "%s: Next Router LSA %s to aggreat with len %u interface_id %s", | |
15569c58 | 1066 | __func__, rtr_lsa->name, |
996c9314 | 1067 | ntohs(lsa_header->length), ifbuf); |
da086a3b CS |
1068 | } |
1069 | ||
1070 | /* Append Next Link State ID LSA */ | |
c4efd0f4 | 1071 | lsa_header = rtr_lsa->header; |
da086a3b CS |
1072 | memcpy(new_header, (OSPF6_LSA_HEADER_END(rtr_lsa->header) + 4), |
1073 | (ntohs(lsa_header->length) - lsa_length)); | |
1074 | new_header += (ntohs(lsa_header->length) - lsa_length); | |
1075 | num_lsa--; | |
1076 | ||
1077 | rtr_lsa = ospf6_lsdb_next(end, rtr_lsa); | |
1078 | } | |
1079 | ||
1080 | /* Calculate birth of this lsa */ | |
1081 | ospf6_lsa_age_set(lsa); | |
1082 | ||
1083 | /* Store Aggregated LSA into area temp lsdb */ | |
1084 | ospf6_lsdb_add(lsa, area->temp_router_lsa_lsdb); | |
1085 | ||
1086 | if (IS_OSPF6_DEBUG_SPF(PROCESS)) | |
1087 | zlog_debug("%s: LSA %s id %u type 0%x len %u num_lsa %u", | |
15569c58 DA |
1088 | __func__, lsa->name, ntohl(lsa->header->id), |
1089 | ntohs(lsa->header->type), ntohs(lsa->header->length), | |
1090 | num_lsa); | |
da086a3b CS |
1091 | |
1092 | return lsa; | |
1093 | } | |
1094 | ||
1095 | void ospf6_remove_temp_router_lsa(struct ospf6_area *area) | |
1096 | { | |
2e37407f | 1097 | struct ospf6_lsa *lsa = NULL, *lsanext; |
da086a3b | 1098 | |
2e37407f | 1099 | for (ALL_LSDB(area->temp_router_lsa_lsdb, lsa, lsanext)) { |
da086a3b | 1100 | if (IS_OSPF6_DEBUG_SPF(PROCESS)) |
996c9314 LB |
1101 | zlog_debug( |
1102 | "%s Remove LSA %s lsa->lock %u lsdb count %u", | |
5e81f5dd | 1103 | __func__, lsa->name, lsa->lock, |
996c9314 | 1104 | area->temp_router_lsa_lsdb->count); |
da086a3b CS |
1105 | ospf6_lsdb_remove(lsa, area->temp_router_lsa_lsdb); |
1106 | } | |
1107 | } |