Annotation of embedaddon/quagga/isisd/isis_spf.c, revision 1.1.1.1
1.1 misho 1: /*
2: * IS-IS Rout(e)ing protocol - isis_spf.c
3: * The SPT algorithm
4: *
5: * Copyright (C) 2001,2002 Sampo Saaristo
6: * Tampere University of Technology
7: * Institute of Communications Engineering
8: *
9: * This program is free software; you can redistribute it and/or modify it
10: * under the terms of the GNU General Public Licenseas published by the Free
11: * Software Foundation; either version 2 of the License, or (at your option)
12: * any later version.
13: *
14: * This program is distributed in the hope that it will be useful,but WITHOUT
15: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
17: * more details.
18:
19: * You should have received a copy of the GNU General Public License along
20: * with this program; if not, write to the Free Software Foundation, Inc.,
21: * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22: */
23:
24: #include <zebra.h>
25:
26: #include "thread.h"
27: #include "linklist.h"
28: #include "vty.h"
29: #include "log.h"
30: #include "command.h"
31: #include "memory.h"
32: #include "prefix.h"
33: #include "hash.h"
34: #include "if.h"
35: #include "table.h"
36:
37: #include "isis_constants.h"
38: #include "isis_common.h"
39: #include "dict.h"
40: #include "isisd.h"
41: #include "isis_misc.h"
42: #include "isis_adjacency.h"
43: #include "isis_circuit.h"
44: #include "isis_tlv.h"
45: #include "isis_pdu.h"
46: #include "isis_lsp.h"
47: #include "isis_dynhn.h"
48: #include "isis_spf.h"
49: #include "isis_route.h"
50: #include "isis_csm.h"
51:
52: extern struct isis *isis;
53: extern struct thread_master *master;
54: extern struct host host;
55:
56: int isis_run_spf_l1 (struct thread *thread);
57: int isis_run_spf_l2 (struct thread *thread);
58:
59: /* 7.2.7 */
60: static void
61: remove_excess_adjs (struct list *adjs)
62: {
63: struct listnode *node, *excess = NULL;
64: struct isis_adjacency *adj, *candidate = NULL;
65: int comp;
66:
67: for (ALL_LIST_ELEMENTS_RO (adjs, node, adj))
68: {
69: if (excess == NULL)
70: excess = node;
71: candidate = listgetdata (excess);
72:
73: if (candidate->sys_type < adj->sys_type)
74: {
75: excess = node;
76: candidate = adj;
77: continue;
78: }
79: if (candidate->sys_type > adj->sys_type)
80: continue;
81:
82: comp = memcmp (candidate->sysid, adj->sysid, ISIS_SYS_ID_LEN);
83: if (comp > 0)
84: {
85: excess = node;
86: candidate = adj;
87: continue;
88: }
89: if (comp < 0)
90: continue;
91:
92: if (candidate->circuit->circuit_id > adj->circuit->circuit_id)
93: {
94: excess = node;
95: candidate = adj;
96: continue;
97: }
98:
99: if (candidate->circuit->circuit_id < adj->circuit->circuit_id)
100: continue;
101:
102: comp = memcmp (candidate->snpa, adj->snpa, ETH_ALEN);
103: if (comp > 0)
104: {
105: excess = node;
106: candidate = adj;
107: continue;
108: }
109: }
110:
111: list_delete_node (adjs, excess);
112:
113: return;
114: }
115:
116: #ifdef EXTREME_DEBUG
117: static const char *
118: vtype2string (enum vertextype vtype)
119: {
120: switch (vtype)
121: {
122: case VTYPE_PSEUDO_IS:
123: return "pseudo_IS";
124: break;
125: case VTYPE_PSEUDO_TE_IS:
126: return "pseudo_TE-IS";
127: break;
128: case VTYPE_NONPSEUDO_IS:
129: return "IS";
130: break;
131: case VTYPE_NONPSEUDO_TE_IS:
132: return "TE-IS";
133: break;
134: case VTYPE_ES:
135: return "ES";
136: break;
137: case VTYPE_IPREACH_INTERNAL:
138: return "IP internal";
139: break;
140: case VTYPE_IPREACH_EXTERNAL:
141: return "IP external";
142: break;
143: case VTYPE_IPREACH_TE:
144: return "IP TE";
145: break;
146: #ifdef HAVE_IPV6
147: case VTYPE_IP6REACH_INTERNAL:
148: return "IP6 internal";
149: break;
150: case VTYPE_IP6REACH_EXTERNAL:
151: return "IP6 external";
152: break;
153: #endif /* HAVE_IPV6 */
154: default:
155: return "UNKNOWN";
156: }
157: return NULL; /* Not reached */
158: }
159:
160: static const char *
161: vid2string (struct isis_vertex *vertex, u_char * buff)
162: {
163: switch (vertex->type)
164: {
165: case VTYPE_PSEUDO_IS:
166: case VTYPE_PSEUDO_TE_IS:
167: return rawlspid_print (vertex->N.id);
168: break;
169: case VTYPE_NONPSEUDO_IS:
170: case VTYPE_NONPSEUDO_TE_IS:
171: case VTYPE_ES:
172: return sysid_print (vertex->N.id);
173: break;
174: case VTYPE_IPREACH_INTERNAL:
175: case VTYPE_IPREACH_EXTERNAL:
176: case VTYPE_IPREACH_TE:
177: #ifdef HAVE_IPV6
178: case VTYPE_IP6REACH_INTERNAL:
179: case VTYPE_IP6REACH_EXTERNAL:
180: #endif /* HAVE_IPV6 */
181: prefix2str ((struct prefix *) &vertex->N.prefix, (char *) buff, BUFSIZ);
182: break;
183: default:
184: return "UNKNOWN";
185: }
186:
187: return (char *) buff;
188: }
189: #endif /* EXTREME_DEBUG */
190:
191: static struct isis_spftree *
192: isis_spftree_new ()
193: {
194: struct isis_spftree *tree;
195:
196: tree = XCALLOC (MTYPE_ISIS_SPFTREE, sizeof (struct isis_spftree));
197: if (tree == NULL)
198: {
199: zlog_err ("ISIS-Spf: isis_spftree_new Out of memory!");
200: return NULL;
201: }
202:
203: tree->tents = list_new ();
204: tree->paths = list_new ();
205: return tree;
206: }
207:
208: static void
209: isis_vertex_del (struct isis_vertex *vertex)
210: {
211: list_delete (vertex->Adj_N);
212:
213: XFREE (MTYPE_ISIS_VERTEX, vertex);
214:
215: return;
216: }
217:
218: #if 0 /* HT: Not used yet. */
219: static void
220: isis_spftree_del (struct isis_spftree *spftree)
221: {
222: spftree->tents->del = (void (*)(void *)) isis_vertex_del;
223: list_delete (spftree->tents);
224:
225: spftree->paths->del = (void (*)(void *)) isis_vertex_del;
226: list_delete (spftree->paths);
227:
228: XFREE (MTYPE_ISIS_SPFTREE, spftree);
229:
230: return;
231: }
232: #endif
233:
234: void
235: spftree_area_init (struct isis_area *area)
236: {
237: if ((area->is_type & IS_LEVEL_1) && area->spftree[0] == NULL)
238: {
239: area->spftree[0] = isis_spftree_new ();
240: #ifdef HAVE_IPV6
241: area->spftree6[0] = isis_spftree_new ();
242: #endif
243:
244: /* thread_add_timer (master, isis_run_spf_l1, area,
245: isis_jitter (PERIODIC_SPF_INTERVAL, 10)); */
246: }
247:
248: if ((area->is_type & IS_LEVEL_2) && area->spftree[1] == NULL)
249: {
250: area->spftree[1] = isis_spftree_new ();
251: #ifdef HAVE_IPV6
252: area->spftree6[1] = isis_spftree_new ();
253: #endif
254: /* thread_add_timer (master, isis_run_spf_l2, area,
255: isis_jitter (PERIODIC_SPF_INTERVAL, 10)); */
256: }
257:
258: return;
259: }
260:
261: static struct isis_vertex *
262: isis_vertex_new (void *id, enum vertextype vtype)
263: {
264: struct isis_vertex *vertex;
265:
266: vertex = XCALLOC (MTYPE_ISIS_VERTEX, sizeof (struct isis_vertex));
267: if (vertex == NULL)
268: {
269: zlog_err ("isis_vertex_new Out of memory!");
270: return NULL;
271: }
272:
273: vertex->type = vtype;
274: switch (vtype)
275: {
276: case VTYPE_ES:
277: case VTYPE_NONPSEUDO_IS:
278: case VTYPE_NONPSEUDO_TE_IS:
279: memcpy (vertex->N.id, (u_char *) id, ISIS_SYS_ID_LEN);
280: break;
281: case VTYPE_PSEUDO_IS:
282: case VTYPE_PSEUDO_TE_IS:
283: memcpy (vertex->N.id, (u_char *) id, ISIS_SYS_ID_LEN + 1);
284: break;
285: case VTYPE_IPREACH_INTERNAL:
286: case VTYPE_IPREACH_EXTERNAL:
287: case VTYPE_IPREACH_TE:
288: #ifdef HAVE_IPV6
289: case VTYPE_IP6REACH_INTERNAL:
290: case VTYPE_IP6REACH_EXTERNAL:
291: #endif /* HAVE_IPV6 */
292: memcpy (&vertex->N.prefix, (struct prefix *) id,
293: sizeof (struct prefix));
294: break;
295: default:
296: zlog_err ("WTF!");
297: }
298:
299: vertex->Adj_N = list_new ();
300:
301: return vertex;
302: }
303:
304: /*
305: * Add this IS to the root of SPT
306: */
307: static void
308: isis_spf_add_self (struct isis_spftree *spftree, struct isis_area *area,
309: int level)
310: {
311: struct isis_vertex *vertex;
312: struct isis_lsp *lsp;
313: u_char lspid[ISIS_SYS_ID_LEN + 2];
314: #ifdef EXTREME_DEBUG
315: u_char buff[BUFSIZ];
316: #endif /* EXTREME_DEBUG */
317: memcpy (lspid, isis->sysid, ISIS_SYS_ID_LEN);
318: LSP_PSEUDO_ID (lspid) = 0;
319: LSP_FRAGMENT (lspid) = 0;
320:
321: lsp = lsp_search (lspid, area->lspdb[level - 1]);
322:
323: if (lsp == NULL)
324: zlog_warn ("ISIS-Spf: could not find own l%d LSP!", level);
325:
326: if (!area->oldmetric)
327: vertex = isis_vertex_new (isis->sysid, VTYPE_NONPSEUDO_TE_IS);
328: else
329: vertex = isis_vertex_new (isis->sysid, VTYPE_NONPSEUDO_IS);
330:
331: vertex->lsp = lsp;
332:
333: listnode_add (spftree->paths, vertex);
334:
335: #ifdef EXTREME_DEBUG
336: zlog_debug ("ISIS-Spf: added this IS %s %s depth %d dist %d to PATHS",
337: vtype2string (vertex->type), vid2string (vertex, buff),
338: vertex->depth, vertex->d_N);
339: #endif /* EXTREME_DEBUG */
340:
341: return;
342: }
343:
344: static struct isis_vertex *
345: isis_find_vertex (struct list *list, void *id, enum vertextype vtype)
346: {
347: struct listnode *node;
348: struct isis_vertex *vertex;
349: struct prefix *p1, *p2;
350:
351: for (ALL_LIST_ELEMENTS_RO (list, node, vertex))
352: {
353: if (vertex->type != vtype)
354: continue;
355: switch (vtype)
356: {
357: case VTYPE_ES:
358: case VTYPE_NONPSEUDO_IS:
359: case VTYPE_NONPSEUDO_TE_IS:
360: if (memcmp ((u_char *) id, vertex->N.id, ISIS_SYS_ID_LEN) == 0)
361: return vertex;
362: break;
363: case VTYPE_PSEUDO_IS:
364: case VTYPE_PSEUDO_TE_IS:
365: if (memcmp ((u_char *) id, vertex->N.id, ISIS_SYS_ID_LEN + 1) == 0)
366: return vertex;
367: break;
368: case VTYPE_IPREACH_INTERNAL:
369: case VTYPE_IPREACH_EXTERNAL:
370: case VTYPE_IPREACH_TE:
371: #ifdef HAVE_IPV6
372: case VTYPE_IP6REACH_INTERNAL:
373: case VTYPE_IP6REACH_EXTERNAL:
374: #endif /* HAVE_IPV6 */
375: p1 = (struct prefix *) id;
376: p2 = (struct prefix *) &vertex->N.id;
377: if (p1->family == p2->family && p1->prefixlen == p2->prefixlen &&
378: memcmp (&p1->u.prefix, &p2->u.prefix,
379: PSIZE (p1->prefixlen)) == 0)
380: return vertex;
381: break;
382: }
383: }
384:
385: return NULL;
386: }
387:
388: /*
389: * Add a vertex to TENT sorted by cost and by vertextype on tie break situation
390: */
391: static struct isis_vertex *
392: isis_spf_add2tent (struct isis_spftree *spftree, enum vertextype vtype,
393: void *id, struct isis_adjacency *adj, u_int32_t cost,
394: int depth, int family)
395: {
396: struct isis_vertex *vertex, *v;
397: struct listnode *node;
398: #ifdef EXTREME_DEBUG
399: u_char buff[BUFSIZ];
400: #endif
401:
402: vertex = isis_vertex_new (id, vtype);
403: vertex->d_N = cost;
404: vertex->depth = depth;
405:
406: if (adj)
407: listnode_add (vertex->Adj_N, adj);
408: #ifdef EXTREME_DEBUG
409: zlog_debug ("ISIS-Spf: add to TENT %s %s depth %d dist %d",
410: vtype2string (vertex->type), vid2string (vertex, buff),
411: vertex->depth, vertex->d_N);
412: #endif /* EXTREME_DEBUG */
413: listnode_add (spftree->tents, vertex);
414: if (list_isempty (spftree->tents))
415: {
416: listnode_add (spftree->tents, vertex);
417: return vertex;
418: }
419:
420: /* XXX: This cant use the standard ALL_LIST_ELEMENT macro */
421: for (node = listhead (spftree->tents); node; node = listnextnode (node))
422: {
423: v = listgetdata (node);
424: if (v->d_N > vertex->d_N)
425: {
426: list_add_node_prev (spftree->tents, node, vertex);
427: break;
428: }
429: else if (v->d_N == vertex->d_N)
430: {
431: /* Tie break, add according to type */
432: while (v && v->d_N == vertex->d_N && v->type > vertex->type)
433: {
434: if (v->type > vertex->type)
435: {
436: break;
437: }
438: /* XXX: this seems dubious, node is the loop iterator */
439: node = listnextnode (node);
440: (node) ? (v = listgetdata (node)) : (v = NULL);
441: }
442: list_add_node_prev (spftree->tents, node, vertex);
443: break;
444: }
445: else if (node->next == NULL)
446: {
447: list_add_node_next (spftree->tents, node, vertex);
448: break;
449: }
450: }
451: return vertex;
452: }
453:
454: static struct isis_vertex *
455: isis_spf_add_local (struct isis_spftree *spftree, enum vertextype vtype,
456: void *id, struct isis_adjacency *adj, u_int32_t cost,
457: int family)
458: {
459: struct isis_vertex *vertex;
460:
461: vertex = isis_find_vertex (spftree->tents, id, vtype);
462:
463: if (vertex)
464: {
465: /* C.2.5 c) */
466: if (vertex->d_N == cost)
467: {
468: if (adj)
469: listnode_add (vertex->Adj_N, adj);
470: /* d) */
471: if (listcount (vertex->Adj_N) > ISIS_MAX_PATH_SPLITS)
472: remove_excess_adjs (vertex->Adj_N);
473: }
474: /* f) */
475: else if (vertex->d_N > cost)
476: {
477: listnode_delete (spftree->tents, vertex);
478: goto add2tent;
479: }
480: /* e) do nothing */
481: return vertex;
482: }
483:
484: add2tent:
485: return isis_spf_add2tent (spftree, vtype, id, adj, cost, 1, family);
486: }
487:
488: static void
489: process_N (struct isis_spftree *spftree, enum vertextype vtype, void *id,
490: u_int16_t dist, u_int16_t depth, struct isis_adjacency *adj,
491: int family)
492: {
493: struct isis_vertex *vertex;
494: #ifdef EXTREME_DEBUG
495: u_char buff[255];
496: #endif
497:
498: /* C.2.6 b) */
499: if (dist > MAX_PATH_METRIC)
500: return;
501: /* c) */
502: vertex = isis_find_vertex (spftree->paths, id, vtype);
503: if (vertex)
504: {
505: #ifdef EXTREME_DEBUG
506: zlog_debug ("ISIS-Spf: process_N %s %s dist %d already found from PATH",
507: vtype2string (vtype), vid2string (vertex, buff), dist);
508: #endif /* EXTREME_DEBUG */
509: assert (dist >= vertex->d_N);
510: return;
511: }
512:
513: vertex = isis_find_vertex (spftree->tents, id, vtype);
514: /* d) */
515: if (vertex)
516: {
517: /* 1) */
518: #ifdef EXTREME_DEBUG
519: zlog_debug ("ISIS-Spf: process_N %s %s dist %d",
520: vtype2string (vtype), vid2string (vertex, buff), dist);
521: #endif /* EXTREME_DEBUG */
522: if (vertex->d_N == dist)
523: {
524: if (adj)
525: listnode_add (vertex->Adj_N, adj);
526: /* 2) */
527: if (listcount (vertex->Adj_N) > ISIS_MAX_PATH_SPLITS)
528: remove_excess_adjs (vertex->Adj_N);
529: /* 3) */
530: return;
531: }
532: else if (vertex->d_N < dist)
533: {
534: return;
535: /* 4) */
536: }
537: else
538: {
539: listnode_delete (spftree->tents, vertex);
540: }
541: }
542:
543: isis_spf_add2tent (spftree, vtype, id, adj, dist, depth, family);
544: return;
545: }
546:
547: /*
548: * C.2.6 Step 1
549: */
550: static int
551: isis_spf_process_lsp (struct isis_spftree *spftree, struct isis_lsp *lsp,
552: uint32_t cost, uint16_t depth, int family)
553: {
554: struct listnode *node, *fragnode = NULL;
555: u_int16_t dist;
556: struct is_neigh *is_neigh;
557: struct te_is_neigh *te_is_neigh;
558: struct ipv4_reachability *ipreach;
559: struct te_ipv4_reachability *te_ipv4_reach;
560: enum vertextype vtype;
561: struct prefix prefix;
562: #ifdef HAVE_IPV6
563: struct ipv6_reachability *ip6reach;
564: #endif /* HAVE_IPV6 */
565:
566:
567: if (!lsp->adj)
568: return ISIS_WARNING;
569: if (lsp->tlv_data.nlpids == NULL || !speaks (lsp->tlv_data.nlpids, family))
570: return ISIS_OK;
571:
572: lspfragloop:
573: if (lsp->lsp_header->seq_num == 0)
574: {
575: zlog_warn ("isis_spf_process_lsp(): lsp with 0 seq_num"
576: " - do not process");
577: return ISIS_WARNING;
578: }
579:
580: if (!ISIS_MASK_LSP_OL_BIT (lsp->lsp_header->lsp_bits))
581: {
582: if (lsp->tlv_data.is_neighs)
583: {
584: for (ALL_LIST_ELEMENTS_RO (lsp->tlv_data.is_neighs, node, is_neigh))
585: {
586: /* C.2.6 a) */
587: /* Two way connectivity */
588: if (!memcmp (is_neigh->neigh_id, isis->sysid, ISIS_SYS_ID_LEN))
589: continue;
590: dist = cost + is_neigh->metrics.metric_default;
591: vtype = LSP_PSEUDO_ID (is_neigh->neigh_id) ? VTYPE_PSEUDO_IS
592: : VTYPE_NONPSEUDO_IS;
593: process_N (spftree, vtype, (void *) is_neigh->neigh_id, dist,
594: depth + 1, lsp->adj, family);
595: }
596: }
597: if (lsp->tlv_data.te_is_neighs)
598: {
599: for (ALL_LIST_ELEMENTS_RO (lsp->tlv_data.te_is_neighs, node,
600: te_is_neigh))
601: {
602: uint32_t metric;
603: if (!memcmp (te_is_neigh->neigh_id, isis->sysid, ISIS_SYS_ID_LEN))
604: continue;
605: memcpy (&metric, te_is_neigh->te_metric, 3);
606: dist = cost + ntohl (metric << 8);
607: vtype = LSP_PSEUDO_ID (te_is_neigh->neigh_id) ? VTYPE_PSEUDO_TE_IS
608: : VTYPE_NONPSEUDO_TE_IS;
609: process_N (spftree, vtype, (void *) te_is_neigh->neigh_id, dist,
610: depth + 1, lsp->adj, family);
611: }
612: }
613: if (family == AF_INET && lsp->tlv_data.ipv4_int_reachs)
614: {
615: prefix.family = AF_INET;
616: for (ALL_LIST_ELEMENTS_RO (lsp->tlv_data.ipv4_int_reachs,
617: node, ipreach))
618: {
619: dist = cost + ipreach->metrics.metric_default;
620: vtype = VTYPE_IPREACH_INTERNAL;
621: prefix.u.prefix4 = ipreach->prefix;
622: prefix.prefixlen = ip_masklen (ipreach->mask);
623: process_N (spftree, vtype, (void *) &prefix, dist, depth + 1,
624: lsp->adj, family);
625: }
626: }
627:
628: if (family == AF_INET && lsp->tlv_data.ipv4_ext_reachs)
629: {
630: prefix.family = AF_INET;
631: for (ALL_LIST_ELEMENTS_RO (lsp->tlv_data.ipv4_ext_reachs,
632: node, ipreach))
633: {
634: dist = cost + ipreach->metrics.metric_default;
635: vtype = VTYPE_IPREACH_EXTERNAL;
636: prefix.u.prefix4 = ipreach->prefix;
637: prefix.prefixlen = ip_masklen (ipreach->mask);
638: process_N (spftree, vtype, (void *) &prefix, dist, depth + 1,
639: lsp->adj, family);
640: }
641: }
642: if (family == AF_INET && lsp->tlv_data.te_ipv4_reachs)
643: {
644: prefix.family = AF_INET;
645: for (ALL_LIST_ELEMENTS_RO (lsp->tlv_data.te_ipv4_reachs,
646: node, te_ipv4_reach))
647: {
648: dist = cost + ntohl (te_ipv4_reach->te_metric);
649: vtype = VTYPE_IPREACH_TE;
650: prefix.u.prefix4 = newprefix2inaddr (&te_ipv4_reach->prefix_start,
651: te_ipv4_reach->control);
652: prefix.prefixlen = (te_ipv4_reach->control & 0x3F);
653: process_N (spftree, vtype, (void *) &prefix, dist, depth + 1,
654: lsp->adj, family);
655: }
656: }
657: #ifdef HAVE_IPV6
658: if (family == AF_INET6 && lsp->tlv_data.ipv6_reachs)
659: {
660: prefix.family = AF_INET6;
661: for (ALL_LIST_ELEMENTS_RO (lsp->tlv_data.ipv6_reachs,
662: node, ip6reach))
663: {
664: dist = cost + ip6reach->metric;
665: vtype = (ip6reach->control_info & CTRL_INFO_DISTRIBUTION) ?
666: VTYPE_IP6REACH_EXTERNAL : VTYPE_IP6REACH_INTERNAL;
667: prefix.prefixlen = ip6reach->prefix_len;
668: memcpy (&prefix.u.prefix6.s6_addr, ip6reach->prefix,
669: PSIZE (ip6reach->prefix_len));
670: process_N (spftree, vtype, (void *) &prefix, dist, depth + 1,
671: lsp->adj, family);
672: }
673: }
674: #endif /* HAVE_IPV6 */
675: }
676:
677: if (fragnode == NULL)
678: fragnode = listhead (lsp->lspu.frags);
679: else
680: fragnode = listnextnode (fragnode);
681:
682: if (fragnode)
683: {
684: lsp = listgetdata (fragnode);
685: goto lspfragloop;
686: }
687:
688: return ISIS_OK;
689: }
690:
691: static int
692: isis_spf_process_pseudo_lsp (struct isis_spftree *spftree,
693: struct isis_lsp *lsp, uint16_t cost,
694: uint16_t depth, int family)
695: {
696: struct listnode *node, *fragnode = NULL;
697: struct is_neigh *is_neigh;
698: struct te_is_neigh *te_is_neigh;
699: enum vertextype vtype;
700:
701: pseudofragloop:
702:
703: if (lsp->lsp_header->seq_num == 0)
704: {
705: zlog_warn ("isis_spf_process_pseudo_lsp(): lsp with 0 seq_num"
706: " - do not process");
707: return ISIS_WARNING;
708: }
709:
710: if (lsp->tlv_data.is_neighs)
711: for (ALL_LIST_ELEMENTS_RO (lsp->tlv_data.is_neighs, node, is_neigh))
712: {
713: vtype = LSP_PSEUDO_ID (is_neigh->neigh_id) ? VTYPE_PSEUDO_IS
714: : VTYPE_NONPSEUDO_IS;
715: /* Two way connectivity */
716: if (!memcmp (is_neigh->neigh_id, isis->sysid, ISIS_SYS_ID_LEN))
717: continue;
718: if (isis_find_vertex
719: (spftree->tents, (void *) is_neigh->neigh_id, vtype) == NULL
720: && isis_find_vertex (spftree->paths, (void *) is_neigh->neigh_id,
721: vtype) == NULL)
722: {
723: /* C.2.5 i) */
724: isis_spf_add2tent (spftree, vtype, is_neigh->neigh_id, lsp->adj,
725: cost, depth, family);
726: }
727: }
728: if (lsp->tlv_data.te_is_neighs)
729: for (ALL_LIST_ELEMENTS_RO (lsp->tlv_data.te_is_neighs, node, te_is_neigh))
730: {
731: vtype = LSP_PSEUDO_ID (te_is_neigh->neigh_id) ? VTYPE_PSEUDO_TE_IS
732: : VTYPE_NONPSEUDO_TE_IS;
733: /* Two way connectivity */
734: if (!memcmp (te_is_neigh->neigh_id, isis->sysid, ISIS_SYS_ID_LEN))
735: continue;
736: if (isis_find_vertex
737: (spftree->tents, (void *) te_is_neigh->neigh_id, vtype) == NULL
738: && isis_find_vertex (spftree->paths, (void *) te_is_neigh->neigh_id,
739: vtype) == NULL)
740: {
741: /* C.2.5 i) */
742: isis_spf_add2tent (spftree, vtype, te_is_neigh->neigh_id, lsp->adj,
743: cost, depth, family);
744: }
745: }
746:
747: if (fragnode == NULL)
748: fragnode = listhead (lsp->lspu.frags);
749: else
750: fragnode = listnextnode (fragnode);
751:
752: if (fragnode)
753: {
754: lsp = listgetdata (fragnode);
755: goto pseudofragloop;
756: }
757:
758: return ISIS_OK;
759: }
760:
761: static int
762: isis_spf_preload_tent (struct isis_spftree *spftree,
763: struct isis_area *area, int level, int family)
764: {
765: struct isis_vertex *vertex;
766: struct isis_circuit *circuit;
767: struct listnode *cnode, *anode, *ipnode;
768: struct isis_adjacency *adj;
769: struct isis_lsp *lsp;
770: struct list *adj_list;
771: struct list *adjdb;
772: struct prefix_ipv4 *ipv4;
773: struct prefix prefix;
774: int retval = ISIS_OK;
775: u_char lsp_id[ISIS_SYS_ID_LEN + 2];
776: #ifdef HAVE_IPV6
777: struct prefix_ipv6 *ipv6;
778: #endif /* HAVE_IPV6 */
779:
780: for (ALL_LIST_ELEMENTS_RO (area->circuit_list, cnode, circuit))
781: {
782: if (circuit->state != C_STATE_UP)
783: continue;
784: if (!(circuit->circuit_is_type & level))
785: continue;
786: if (family == AF_INET && !circuit->ip_router)
787: continue;
788: #ifdef HAVE_IPV6
789: if (family == AF_INET6 && !circuit->ipv6_router)
790: continue;
791: #endif /* HAVE_IPV6 */
792: /*
793: * Add IP(v6) addresses of this circuit
794: */
795: if (family == AF_INET)
796: {
797: prefix.family = AF_INET;
798: for (ALL_LIST_ELEMENTS_RO (circuit->ip_addrs, ipnode, ipv4))
799: {
800: prefix.u.prefix4 = ipv4->prefix;
801: prefix.prefixlen = ipv4->prefixlen;
802: isis_spf_add_local (spftree, VTYPE_IPREACH_INTERNAL, &prefix,
803: NULL, 0, family);
804: }
805: }
806: #ifdef HAVE_IPV6
807: if (family == AF_INET6)
808: {
809: prefix.family = AF_INET6;
810: for (ALL_LIST_ELEMENTS_RO (circuit->ipv6_non_link, ipnode, ipv6))
811: {
812: prefix.prefixlen = ipv6->prefixlen;
813: prefix.u.prefix6 = ipv6->prefix;
814: isis_spf_add_local (spftree, VTYPE_IP6REACH_INTERNAL,
815: &prefix, NULL, 0, family);
816: }
817: }
818: #endif /* HAVE_IPV6 */
819: if (circuit->circ_type == CIRCUIT_T_BROADCAST)
820: {
821: /*
822: * Add the adjacencies
823: */
824: adj_list = list_new ();
825: adjdb = circuit->u.bc.adjdb[level - 1];
826: isis_adj_build_up_list (adjdb, adj_list);
827: if (listcount (adj_list) == 0)
828: {
829: list_delete (adj_list);
830: if (isis->debugs & DEBUG_SPF_EVENTS)
831: zlog_debug ("ISIS-Spf: no L%d adjacencies on circuit %s",
832: level, circuit->interface->name);
833: continue;
834: }
835: anode = listhead (adj_list);
836: while (anode)
837: {
838: adj = listgetdata (anode);
839: if (!speaks (&adj->nlpids, family))
840: {
841: anode = listnextnode (anode);
842: continue;
843: }
844: switch (adj->sys_type)
845: {
846: case ISIS_SYSTYPE_ES:
847: isis_spf_add_local (spftree, VTYPE_ES, adj->sysid, adj,
848: circuit->te_metric[level - 1], family);
849: break;
850: case ISIS_SYSTYPE_IS:
851: case ISIS_SYSTYPE_L1_IS:
852: case ISIS_SYSTYPE_L2_IS:
853: vertex =
854: isis_spf_add_local (spftree, VTYPE_NONPSEUDO_IS,
855: adj->sysid, adj,
856: circuit->te_metric[level - 1], family);
857: memcpy (lsp_id, adj->sysid, ISIS_SYS_ID_LEN);
858: LSP_PSEUDO_ID (lsp_id) = 0;
859: LSP_FRAGMENT (lsp_id) = 0;
860: lsp = lsp_search (lsp_id, area->lspdb[level - 1]);
861: if (!lsp)
862: zlog_warn ("No lsp found for IS adjacency");
863: /* else {
864: isis_spf_process_lsp (spftree, lsp, vertex->d_N, 1, family);
865: } */
866: break;
867: case ISIS_SYSTYPE_UNKNOWN:
868: default:
869: zlog_warn ("isis_spf_preload_tent unknow adj type");
870: }
871: anode = listnextnode (anode);
872: }
873: list_delete (adj_list);
874: /*
875: * Add the pseudonode
876: */
877: if (level == 1)
878: memcpy (lsp_id, circuit->u.bc.l1_desig_is, ISIS_SYS_ID_LEN + 1);
879: else
880: memcpy (lsp_id, circuit->u.bc.l2_desig_is, ISIS_SYS_ID_LEN + 1);
881: lsp = lsp_search (lsp_id, area->lspdb[level - 1]);
882: adj = isis_adj_lookup (lsp_id, adjdb);
883: /* if no adj, we are the dis or error */
884: if (!adj && !circuit->u.bc.is_dr[level - 1])
885: {
886: zlog_warn ("ISIS-Spf: No adjacency found for DR");
887: }
888: if (lsp == NULL || lsp->lsp_header->rem_lifetime == 0)
889: {
890: zlog_warn ("ISIS-Spf: No lsp found for DR");
891: }
892: else
893: {
894: isis_spf_process_pseudo_lsp (spftree, lsp,
895: circuit->te_metric[level - 1], 0, family);
896:
897: }
898: }
899: else if (circuit->circ_type == CIRCUIT_T_P2P)
900: {
901: adj = circuit->u.p2p.neighbor;
902: if (!adj)
903: continue;
904: switch (adj->sys_type)
905: {
906: case ISIS_SYSTYPE_ES:
907: isis_spf_add_local (spftree, VTYPE_ES, adj->sysid, adj,
908: circuit->te_metric[level - 1], family);
909: break;
910: case ISIS_SYSTYPE_IS:
911: case ISIS_SYSTYPE_L1_IS:
912: case ISIS_SYSTYPE_L2_IS:
913: if (speaks (&adj->nlpids, family))
914: isis_spf_add_local (spftree, VTYPE_NONPSEUDO_IS, adj->sysid,
915: adj, circuit->te_metric[level - 1],
916: family);
917: break;
918: case ISIS_SYSTYPE_UNKNOWN:
919: default:
920: zlog_warn ("isis_spf_preload_tent unknow adj type");
921: break;
922: }
923: }
924: else
925: {
926: zlog_warn ("isis_spf_preload_tent unsupported media");
927: retval = ISIS_WARNING;
928: }
929:
930: }
931:
932: return retval;
933: }
934:
935: /*
936: * The parent(s) for vertex is set when added to TENT list
937: * now we just put the child pointer(s) in place
938: */
939: static void
940: add_to_paths (struct isis_spftree *spftree, struct isis_vertex *vertex,
941: struct isis_area *area, int level)
942: {
943: #ifdef EXTREME_DEBUG
944: u_char buff[BUFSIZ];
945: #endif /* EXTREME_DEBUG */
946: listnode_add (spftree->paths, vertex);
947:
948: #ifdef EXTREME_DEBUG
949: zlog_debug ("ISIS-Spf: added %s %s depth %d dist %d to PATHS",
950: vtype2string (vertex->type), vid2string (vertex, buff),
951: vertex->depth, vertex->d_N);
952: #endif /* EXTREME_DEBUG */
953: if (vertex->type > VTYPE_ES)
954: {
955: if (listcount (vertex->Adj_N) > 0)
956: isis_route_create ((struct prefix *) &vertex->N.prefix, vertex->d_N,
957: vertex->depth, vertex->Adj_N, area, level);
958: else if (isis->debugs & DEBUG_SPF_EVENTS)
959: zlog_debug ("ISIS-Spf: no adjacencies do not install route");
960: }
961:
962: return;
963: }
964:
965: static void
966: init_spt (struct isis_spftree *spftree)
967: {
968: spftree->tents->del = spftree->paths->del = (void (*)(void *)) isis_vertex_del;
969: list_delete_all_node (spftree->tents);
970: list_delete_all_node (spftree->paths);
971: spftree->tents->del = spftree->paths->del = NULL;
972:
973: return;
974: }
975:
976: static int
977: isis_run_spf (struct isis_area *area, int level, int family)
978: {
979: int retval = ISIS_OK;
980: struct listnode *node;
981: struct isis_vertex *vertex;
982: struct isis_spftree *spftree = NULL;
983: u_char lsp_id[ISIS_SYS_ID_LEN + 2];
984: struct isis_lsp *lsp;
985: struct route_table *table = NULL;
986: struct route_node *rode;
987: struct isis_route_info *rinfo;
988:
989: if (family == AF_INET)
990: spftree = area->spftree[level - 1];
991: #ifdef HAVE_IPV6
992: else if (family == AF_INET6)
993: spftree = area->spftree6[level - 1];
994: #endif
995:
996: assert (spftree);
997:
998: /* Make all routes in current route table inactive. */
999: if (family == AF_INET)
1000: table = area->route_table[level - 1];
1001: #ifdef HAVE_IPV6
1002: else if (family == AF_INET6)
1003: table = area->route_table6[level - 1];
1004: #endif
1005:
1006: for (rode = route_top (table); rode; rode = route_next (rode))
1007: {
1008: if (rode->info == NULL)
1009: continue;
1010: rinfo = rode->info;
1011:
1012: UNSET_FLAG (rinfo->flag, ISIS_ROUTE_FLAG_ACTIVE);
1013: }
1014:
1015: /*
1016: * C.2.5 Step 0
1017: */
1018: init_spt (spftree);
1019: /* a) */
1020: isis_spf_add_self (spftree, area, level);
1021: /* b) */
1022: retval = isis_spf_preload_tent (spftree, area, level, family);
1023:
1024: /*
1025: * C.2.7 Step 2
1026: */
1027: if (listcount (spftree->tents) == 0)
1028: {
1029: zlog_warn ("ISIS-Spf: TENT is empty");
1030: goto out;
1031: }
1032:
1033: while (listcount (spftree->tents) > 0)
1034: {
1035: node = listhead (spftree->tents);
1036: vertex = listgetdata (node);
1037: /* Remove from tent list */
1038: list_delete_node (spftree->tents, node);
1039: if (isis_find_vertex (spftree->paths, vertex->N.id, vertex->type))
1040: continue;
1041: add_to_paths (spftree, vertex, area, level);
1042: if (vertex->type == VTYPE_PSEUDO_IS ||
1043: vertex->type == VTYPE_NONPSEUDO_IS)
1044: {
1045: memcpy (lsp_id, vertex->N.id, ISIS_SYS_ID_LEN + 1);
1046: LSP_FRAGMENT (lsp_id) = 0;
1047: lsp = lsp_search (lsp_id, area->lspdb[level - 1]);
1048: if (lsp)
1049: {
1050: if (LSP_PSEUDO_ID (lsp_id))
1051: {
1052: isis_spf_process_pseudo_lsp (spftree, lsp, vertex->d_N,
1053: vertex->depth, family);
1054:
1055: }
1056: else
1057: {
1058: isis_spf_process_lsp (spftree, lsp, vertex->d_N,
1059: vertex->depth, family);
1060: }
1061: }
1062: else
1063: {
1064: zlog_warn ("ISIS-Spf: No LSP found for %s",
1065: rawlspid_print (lsp_id));
1066: }
1067: }
1068: }
1069:
1070: out:
1071: thread_add_event (master, isis_route_validate, area, 0);
1072: spftree->lastrun = time (NULL);
1073: spftree->pending = 0;
1074:
1075: return retval;
1076: }
1077:
1078: int
1079: isis_run_spf_l1 (struct thread *thread)
1080: {
1081: struct isis_area *area;
1082: int retval = ISIS_OK;
1083:
1084: area = THREAD_ARG (thread);
1085: assert (area);
1086:
1087: area->spftree[0]->t_spf = NULL;
1088:
1089: if (!(area->is_type & IS_LEVEL_1))
1090: {
1091: if (isis->debugs & DEBUG_SPF_EVENTS)
1092: zlog_warn ("ISIS-SPF (%s) area does not share level",
1093: area->area_tag);
1094: return ISIS_WARNING;
1095: }
1096:
1097: if (isis->debugs & DEBUG_SPF_EVENTS)
1098: zlog_debug ("ISIS-Spf (%s) L1 SPF needed, periodic SPF", area->area_tag);
1099:
1100: if (area->ip_circuits)
1101: retval = isis_run_spf (area, 1, AF_INET);
1102:
1103: THREAD_TIMER_ON (master, area->spftree[0]->t_spf, isis_run_spf_l1, area,
1104: isis_jitter (PERIODIC_SPF_INTERVAL, 10));
1105:
1106: return retval;
1107: }
1108:
1109: int
1110: isis_run_spf_l2 (struct thread *thread)
1111: {
1112: struct isis_area *area;
1113: int retval = ISIS_OK;
1114:
1115: area = THREAD_ARG (thread);
1116: assert (area);
1117:
1118: area->spftree[1]->t_spf = NULL;
1119:
1120: if (!(area->is_type & IS_LEVEL_2))
1121: {
1122: if (isis->debugs & DEBUG_SPF_EVENTS)
1123: zlog_warn ("ISIS-SPF (%s) area does not share level", area->area_tag);
1124: return ISIS_WARNING;
1125: }
1126:
1127: if (isis->debugs & DEBUG_SPF_EVENTS)
1128: zlog_debug ("ISIS-Spf (%s) L2 SPF needed, periodic SPF", area->area_tag);
1129:
1130: if (area->ip_circuits)
1131: retval = isis_run_spf (area, 2, AF_INET);
1132:
1133: THREAD_TIMER_ON (master, area->spftree[1]->t_spf, isis_run_spf_l2, area,
1134: isis_jitter (PERIODIC_SPF_INTERVAL, 10));
1135:
1136: return retval;
1137: }
1138:
1139: int
1140: isis_spf_schedule (struct isis_area *area, int level)
1141: {
1142: int retval = ISIS_OK;
1143: struct isis_spftree *spftree = area->spftree[level - 1];
1144: time_t diff, now = time (NULL);
1145:
1146: if (spftree->pending)
1147: return retval;
1148:
1149: diff = now - spftree->lastrun;
1150:
1151: /* FIXME: let's wait a minute before doing the SPF */
1152: if (now - isis->uptime < 60 || isis->uptime == 0)
1153: {
1154: if (level == 1)
1155: THREAD_TIMER_ON (master, spftree->t_spf, isis_run_spf_l1, area, 60);
1156: else
1157: THREAD_TIMER_ON (master, spftree->t_spf, isis_run_spf_l2, area, 60);
1158:
1159: spftree->pending = 1;
1160: return retval;
1161: }
1162:
1163: THREAD_TIMER_OFF (spftree->t_spf);
1164:
1165: if (diff < MINIMUM_SPF_INTERVAL)
1166: {
1167: if (level == 1)
1168: THREAD_TIMER_ON (master, spftree->t_spf, isis_run_spf_l1, area,
1169: MINIMUM_SPF_INTERVAL - diff);
1170: else
1171: THREAD_TIMER_ON (master, spftree->t_spf, isis_run_spf_l2, area,
1172: MINIMUM_SPF_INTERVAL - diff);
1173:
1174: spftree->pending = 1;
1175: }
1176: else
1177: {
1178: spftree->pending = 0;
1179: retval = isis_run_spf (area, level, AF_INET);
1180: if (level == 1)
1181: THREAD_TIMER_ON (master, spftree->t_spf, isis_run_spf_l1, area,
1182: isis_jitter (PERIODIC_SPF_INTERVAL, 10));
1183: else
1184: THREAD_TIMER_ON (master, spftree->t_spf, isis_run_spf_l2, area,
1185: isis_jitter (PERIODIC_SPF_INTERVAL, 10));
1186: }
1187:
1188: return retval;
1189: }
1190:
1191: #ifdef HAVE_IPV6
1192: static int
1193: isis_run_spf6_l1 (struct thread *thread)
1194: {
1195: struct isis_area *area;
1196: int retval = ISIS_OK;
1197:
1198: area = THREAD_ARG (thread);
1199: assert (area);
1200:
1201: area->spftree6[0]->t_spf = NULL;
1202:
1203: if (!(area->is_type & IS_LEVEL_1))
1204: {
1205: if (isis->debugs & DEBUG_SPF_EVENTS)
1206: zlog_warn ("ISIS-SPF (%s) area does not share level", area->area_tag);
1207: return ISIS_WARNING;
1208: }
1209:
1210: if (isis->debugs & DEBUG_SPF_EVENTS)
1211: zlog_debug ("ISIS-Spf (%s) L1 SPF needed, periodic SPF", area->area_tag);
1212:
1213: if (area->ipv6_circuits)
1214: retval = isis_run_spf (area, 1, AF_INET6);
1215:
1216: THREAD_TIMER_ON (master, area->spftree6[0]->t_spf, isis_run_spf6_l1, area,
1217: isis_jitter (PERIODIC_SPF_INTERVAL, 10));
1218:
1219: return retval;
1220: }
1221:
1222: static int
1223: isis_run_spf6_l2 (struct thread *thread)
1224: {
1225: struct isis_area *area;
1226: int retval = ISIS_OK;
1227:
1228: area = THREAD_ARG (thread);
1229: assert (area);
1230:
1231: area->spftree6[1]->t_spf = NULL;
1232:
1233: if (!(area->is_type & IS_LEVEL_2))
1234: {
1235: if (isis->debugs & DEBUG_SPF_EVENTS)
1236: zlog_warn ("ISIS-SPF (%s) area does not share level", area->area_tag);
1237: return ISIS_WARNING;
1238: }
1239:
1240: if (isis->debugs & DEBUG_SPF_EVENTS)
1241: zlog_debug ("ISIS-Spf (%s) L2 SPF needed, periodic SPF.", area->area_tag);
1242:
1243: if (area->ipv6_circuits)
1244: retval = isis_run_spf (area, 2, AF_INET6);
1245:
1246: THREAD_TIMER_ON (master, area->spftree6[1]->t_spf, isis_run_spf6_l2, area,
1247: isis_jitter (PERIODIC_SPF_INTERVAL, 10));
1248:
1249: return retval;
1250: }
1251:
1252: int
1253: isis_spf_schedule6 (struct isis_area *area, int level)
1254: {
1255: int retval = ISIS_OK;
1256: struct isis_spftree *spftree = area->spftree6[level - 1];
1257: time_t diff, now = time (NULL);
1258:
1259: if (spftree->pending)
1260: return retval;
1261:
1262: diff = now - spftree->lastrun;
1263:
1264: /* FIXME: let's wait a minute before doing the SPF */
1265: if (now - isis->uptime < 60 || isis->uptime == 0)
1266: {
1267: if (level == 1)
1268: THREAD_TIMER_ON (master, spftree->t_spf, isis_run_spf6_l1, area, 60);
1269: else
1270: THREAD_TIMER_ON (master, spftree->t_spf, isis_run_spf6_l2, area, 60);
1271:
1272: spftree->pending = 1;
1273: return retval;
1274: }
1275:
1276: THREAD_TIMER_OFF (spftree->t_spf);
1277:
1278: if (diff < MINIMUM_SPF_INTERVAL)
1279: {
1280: if (level == 1)
1281: THREAD_TIMER_ON (master, spftree->t_spf, isis_run_spf6_l1, area,
1282: MINIMUM_SPF_INTERVAL - diff);
1283: else
1284: THREAD_TIMER_ON (master, spftree->t_spf, isis_run_spf6_l2, area,
1285: MINIMUM_SPF_INTERVAL - diff);
1286:
1287: spftree->pending = 1;
1288: }
1289: else
1290: {
1291: spftree->pending = 0;
1292: retval = isis_run_spf (area, level, AF_INET6);
1293:
1294: if (level == 1)
1295: THREAD_TIMER_ON (master, spftree->t_spf, isis_run_spf6_l1, area,
1296: isis_jitter (PERIODIC_SPF_INTERVAL, 10));
1297: else
1298: THREAD_TIMER_ON (master, spftree->t_spf, isis_run_spf6_l2, area,
1299: isis_jitter (PERIODIC_SPF_INTERVAL, 10));
1300: }
1301:
1302: return retval;
1303: }
1304: #endif
1305:
1306: static void
1307: isis_print_paths (struct vty *vty, struct list *paths)
1308: {
1309: struct listnode *node;
1310: struct isis_vertex *vertex;
1311: struct isis_dynhn *dyn, *nh_dyn = NULL;
1312: struct isis_adjacency *adj;
1313: #if 0
1314: u_char buff[255];
1315: #endif /* 0 */
1316:
1317: vty_out (vty, "System Id Metric Next-Hop"
1318: " Interface SNPA%s", VTY_NEWLINE);
1319:
1320: for (ALL_LIST_ELEMENTS_RO (paths, node, vertex))
1321: {
1322: if (vertex->type != VTYPE_NONPSEUDO_IS)
1323: continue;
1324: if (memcmp (vertex->N.id, isis->sysid, ISIS_SYS_ID_LEN) == 0)
1325: {
1326: vty_out (vty, "%s --%s", host.name?host.name:"",
1327: VTY_NEWLINE);
1328: }
1329: else
1330: {
1331: dyn = dynhn_find_by_id ((u_char *) vertex->N.id);
1332: adj = listgetdata (listhead (vertex->Adj_N));
1333: if (adj)
1334: {
1335: nh_dyn = dynhn_find_by_id (adj->sysid);
1336: vty_out (vty, "%-20s %-10u %-20s %-11s %-5s%s",
1337: (dyn != NULL) ? dyn->name.name :
1338: (const u_char *)rawlspid_print ((u_char *) vertex->N.id),
1339: vertex->d_N, (nh_dyn != NULL) ? nh_dyn->name.name :
1340: (const u_char *)rawlspid_print (adj->sysid),
1341: adj->circuit->interface->name,
1342: snpa_print (adj->snpa), VTY_NEWLINE);
1343: }
1344: else
1345: {
1346: vty_out (vty, "%s %u %s", dyn ? dyn->name.name :
1347: (const u_char *) rawlspid_print (vertex->N.id),
1348: vertex->d_N, VTY_NEWLINE);
1349: }
1350: }
1351: #if 0
1352: vty_out (vty, "%s %s %u %s", vtype2string (vertex->type),
1353: vid2string (vertex, buff), vertex->d_N, VTY_NEWLINE);
1354: #endif
1355: }
1356: }
1357:
1358: DEFUN (show_isis_topology,
1359: show_isis_topology_cmd,
1360: "show isis topology",
1361: SHOW_STR
1362: "IS-IS information\n"
1363: "IS-IS paths to Intermediate Systems\n")
1364: {
1365: struct listnode *node;
1366: struct isis_area *area;
1367: int level;
1368:
1369: if (!isis->area_list || isis->area_list->count == 0)
1370: return CMD_SUCCESS;
1371:
1372: for (ALL_LIST_ELEMENTS_RO (isis->area_list, node, area))
1373: {
1374: vty_out (vty, "Area %s:%s", area->area_tag ? area->area_tag : "null",
1375: VTY_NEWLINE);
1376:
1377: for (level = 0; level < ISIS_LEVELS; level++)
1378: {
1379: if (area->ip_circuits > 0 && area->spftree[level]
1380: && area->spftree[level]->paths->count > 0)
1381: {
1382: vty_out (vty, "IS-IS paths to level-%d routers that speak IP%s",
1383: level + 1, VTY_NEWLINE);
1384: isis_print_paths (vty, area->spftree[level]->paths);
1385: }
1386: #ifdef HAVE_IPV6
1387: if (area->ipv6_circuits > 0 && area->spftree6[level]
1388: && area->spftree6[level]->paths->count > 0)
1389: {
1390: vty_out (vty,
1391: "IS-IS paths to level-%d routers that speak IPv6%s",
1392: level + 1, VTY_NEWLINE);
1393: isis_print_paths (vty, area->spftree6[level]->paths);
1394: }
1395: #endif /* HAVE_IPV6 */
1396: }
1397: }
1398:
1399: return CMD_SUCCESS;
1400: }
1401:
1402: DEFUN (show_isis_topology_l1,
1403: show_isis_topology_l1_cmd,
1404: "show isis topology level-1",
1405: SHOW_STR
1406: "IS-IS information\n"
1407: "IS-IS paths to Intermediate Systems\n"
1408: "Paths to all level-1 routers in the area\n")
1409: {
1410: struct listnode *node;
1411: struct isis_area *area;
1412:
1413: if (!isis->area_list || isis->area_list->count == 0)
1414: return CMD_SUCCESS;
1415:
1416: for (ALL_LIST_ELEMENTS_RO (isis->area_list, node, area))
1417: {
1418: vty_out (vty, "Area %s:%s", area->area_tag ? area->area_tag : "null",
1419: VTY_NEWLINE);
1420:
1421: if (area->ip_circuits > 0 && area->spftree[0]
1422: && area->spftree[0]->paths->count > 0)
1423: {
1424: vty_out (vty, "IS-IS paths to level-1 routers that speak IP%s",
1425: VTY_NEWLINE);
1426: isis_print_paths (vty, area->spftree[0]->paths);
1427: }
1428: #ifdef HAVE_IPV6
1429: if (area->ipv6_circuits > 0 && area->spftree6[0]
1430: && area->spftree6[0]->paths->count > 0)
1431: {
1432: vty_out (vty, "IS-IS paths to level-1 routers that speak IPv6%s",
1433: VTY_NEWLINE);
1434: isis_print_paths (vty, area->spftree6[0]->paths);
1435: }
1436: #endif /* HAVE_IPV6 */
1437: }
1438:
1439: return CMD_SUCCESS;
1440: }
1441:
1442: DEFUN (show_isis_topology_l2,
1443: show_isis_topology_l2_cmd,
1444: "show isis topology level-2",
1445: SHOW_STR
1446: "IS-IS information\n"
1447: "IS-IS paths to Intermediate Systems\n"
1448: "Paths to all level-2 routers in the domain\n")
1449: {
1450: struct listnode *node;
1451: struct isis_area *area;
1452:
1453: if (!isis->area_list || isis->area_list->count == 0)
1454: return CMD_SUCCESS;
1455:
1456: for (ALL_LIST_ELEMENTS_RO (isis->area_list, node, area))
1457: {
1458: vty_out (vty, "Area %s:%s", area->area_tag ? area->area_tag : "null",
1459: VTY_NEWLINE);
1460:
1461: if (area->ip_circuits > 0 && area->spftree[1]
1462: && area->spftree[1]->paths->count > 0)
1463: {
1464: vty_out (vty, "IS-IS paths to level-2 routers that speak IP%s",
1465: VTY_NEWLINE);
1466: isis_print_paths (vty, area->spftree[1]->paths);
1467: }
1468: #ifdef HAVE_IPV6
1469: if (area->ipv6_circuits > 0 && area->spftree6[1]
1470: && area->spftree6[1]->paths->count > 0)
1471: {
1472: vty_out (vty, "IS-IS paths to level-2 routers that speak IPv6%s",
1473: VTY_NEWLINE);
1474: isis_print_paths (vty, area->spftree6[1]->paths);
1475: }
1476: #endif /* HAVE_IPV6 */
1477: }
1478:
1479: return CMD_SUCCESS;
1480: }
1481:
1482: void
1483: isis_spf_cmds_init ()
1484: {
1485: install_element (VIEW_NODE, &show_isis_topology_cmd);
1486: install_element (VIEW_NODE, &show_isis_topology_l1_cmd);
1487: install_element (VIEW_NODE, &show_isis_topology_l2_cmd);
1488:
1489: install_element (ENABLE_NODE, &show_isis_topology_cmd);
1490: install_element (ENABLE_NODE, &show_isis_topology_l1_cmd);
1491: install_element (ENABLE_NODE, &show_isis_topology_l2_cmd);
1492: }
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