Annotation of embedaddon/quagga/isisd/isis_adjacency.c, revision 1.1.1.1
1.1 misho 1: /*
2: * IS-IS Rout(e)ing protocol - isis_adjacency.c
3: * handling of IS-IS adjacencies
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 "log.h"
27: #include "memory.h"
28: #include "hash.h"
29: #include "vty.h"
30: #include "linklist.h"
31: #include "thread.h"
32: #include "if.h"
33: #include "stream.h"
34:
35: #include "isisd/dict.h"
36: #include "isisd/include-netbsd/iso.h"
37: #include "isisd/isis_constants.h"
38: #include "isisd/isis_common.h"
39: #include "isisd/isisd.h"
40: #include "isisd/isis_circuit.h"
41: #include "isisd/isis_adjacency.h"
42: #include "isisd/isis_misc.h"
43: #include "isisd/isis_dr.h"
44: #include "isisd/isis_dynhn.h"
45: #include "isisd/isis_pdu.h"
46:
47: extern struct isis *isis;
48:
49: static struct isis_adjacency *
50: adj_alloc (u_char * id)
51: {
52: struct isis_adjacency *adj;
53:
54: adj = XCALLOC (MTYPE_ISIS_ADJACENCY, sizeof (struct isis_adjacency));
55: memcpy (adj->sysid, id, ISIS_SYS_ID_LEN);
56:
57: return adj;
58: }
59:
60: struct isis_adjacency *
61: isis_new_adj (u_char * id, u_char * snpa, int level,
62: struct isis_circuit *circuit)
63: {
64: struct isis_adjacency *adj;
65: int i;
66:
67: adj = adj_alloc (id); /* P2P kludge */
68:
69: if (adj == NULL)
70: {
71: zlog_err ("Out of memory!");
72: return NULL;
73: }
74:
75: if (snpa) {
76: memcpy (adj->snpa, snpa, 6);
77: } else {
78: memset (adj->snpa, ' ', 6);
79: }
80:
81: adj->circuit = circuit;
82: adj->level = level;
83: adj->flaps = 0;
84: adj->last_flap = time (NULL);
85: if (circuit->circ_type == CIRCUIT_T_BROADCAST)
86: {
87: listnode_add (circuit->u.bc.adjdb[level - 1], adj);
88: adj->dischanges[level - 1] = 0;
89: for (i = 0; i < DIS_RECORDS; i++) /* clear N DIS state change records */
90: {
91: adj->dis_record[(i * ISIS_LEVELS) + level - 1].dis
92: = ISIS_UNKNOWN_DIS;
93: adj->dis_record[(i * ISIS_LEVELS) + level - 1].last_dis_change
94: = time (NULL);
95: }
96: }
97:
98: return adj;
99: }
100:
101: struct isis_adjacency *
102: isis_adj_lookup (u_char * sysid, struct list *adjdb)
103: {
104: struct isis_adjacency *adj;
105: struct listnode *node;
106:
107: for (ALL_LIST_ELEMENTS_RO (adjdb, node, adj))
108: if (memcmp (adj->sysid, sysid, ISIS_SYS_ID_LEN) == 0)
109: return adj;
110:
111: return NULL;
112: }
113:
114: struct isis_adjacency *
115: isis_adj_lookup_snpa (u_char * ssnpa, struct list *adjdb)
116: {
117: struct listnode *node;
118: struct isis_adjacency *adj;
119:
120: for (ALL_LIST_ELEMENTS_RO (adjdb, node, adj))
121: if (memcmp (adj->snpa, ssnpa, ETH_ALEN) == 0)
122: return adj;
123:
124: return NULL;
125: }
126:
127: void
128: isis_delete_adj (struct isis_adjacency *adj, struct list *adjdb)
129: {
130: if (!adj)
131: return;
132: /* When we recieve a NULL list, we will know its p2p. */
133: if (adjdb)
134: listnode_delete (adjdb, adj);
135:
136: THREAD_OFF (adj->t_expire);
137:
138: if (adj->ipv4_addrs)
139: list_delete (adj->ipv4_addrs);
140: #ifdef HAVE_IPV6
141: if (adj->ipv6_addrs)
142: list_delete (adj->ipv6_addrs);
143: #endif
144:
145: XFREE (MTYPE_ISIS_ADJACENCY, adj);
146: return;
147: }
148:
149: void
150: isis_adj_state_change (struct isis_adjacency *adj, enum isis_adj_state state,
151: const char *reason)
152: {
153: int old_state;
154: int level = adj->level;
155: struct isis_circuit *circuit;
156:
157: old_state = adj->adj_state;
158: adj->adj_state = state;
159:
160: circuit = adj->circuit;
161:
162: if (isis->debugs & DEBUG_ADJ_PACKETS)
163: {
164: zlog_debug ("ISIS-Adj (%s): Adjacency state change %d->%d: %s",
165: circuit->area->area_tag,
166: old_state, state, reason ? reason : "unspecified");
167: }
168:
169: if (circuit->circ_type == CIRCUIT_T_BROADCAST)
170: {
171: if (state == ISIS_ADJ_UP)
172: circuit->upadjcount[level - 1]++;
173: if (state == ISIS_ADJ_DOWN)
174: {
175: isis_delete_adj (adj, adj->circuit->u.bc.adjdb[level - 1]);
176: circuit->upadjcount[level - 1]--;
177: }
178:
179: list_delete_all_node (circuit->u.bc.lan_neighs[level - 1]);
180: isis_adj_build_neigh_list (circuit->u.bc.adjdb[level - 1],
181: circuit->u.bc.lan_neighs[level - 1]);
182: }
183: else if (state == ISIS_ADJ_UP)
184: { /* p2p interface */
185: if (adj->sys_type == ISIS_SYSTYPE_UNKNOWN)
186: send_hello (circuit, 1);
187:
188: /* update counter & timers for debugging purposes */
189: adj->last_flap = time (NULL);
190: adj->flaps++;
191:
192: /* 7.3.17 - going up on P2P -> send CSNP */
193: /* FIXME: yup, I know its wrong... but i will do it! (for now) */
194: send_csnp (circuit, 1);
195: send_csnp (circuit, 2);
196: }
197: else if (state == ISIS_ADJ_DOWN)
198: { /* p2p interface */
199: adj->circuit->u.p2p.neighbor = NULL;
200: isis_delete_adj (adj, NULL);
201: }
202: return;
203: }
204:
205:
206: void
207: isis_adj_print (struct isis_adjacency *adj)
208: {
209: struct isis_dynhn *dyn;
210: struct listnode *node;
211: struct in_addr *ipv4_addr;
212: #ifdef HAVE_IPV6
213: struct in6_addr *ipv6_addr;
214: u_char ip6[INET6_ADDRSTRLEN];
215: #endif /* HAVE_IPV6 */
216:
217: if (!adj)
218: return;
219: dyn = dynhn_find_by_id (adj->sysid);
220: if (dyn)
221: zlog_debug ("%s", dyn->name.name);
222:
223: zlog_debug ("SystemId %20s SNPA %s, level %d\nHolding Time %d",
224: adj->sysid ? sysid_print (adj->sysid) : "unknown",
225: snpa_print (adj->snpa), adj->level, adj->hold_time);
226: if (adj->ipv4_addrs && listcount (adj->ipv4_addrs) > 0)
227: {
228: zlog_debug ("IPv4 Addresses:");
229:
230: for (ALL_LIST_ELEMENTS_RO (adj->ipv4_addrs, node, ipv4_addr))
231: zlog_debug ("%s", inet_ntoa (*ipv4_addr));
232: }
233:
234: #ifdef HAVE_IPV6
235: if (adj->ipv6_addrs && listcount (adj->ipv6_addrs) > 0)
236: {
237: zlog_debug ("IPv6 Addresses:");
238: for (ALL_LIST_ELEMENTS_RO (adj->ipv6_addrs, node, ipv6_addr))
239: {
240: inet_ntop (AF_INET6, ipv6_addr, (char *)ip6, INET6_ADDRSTRLEN);
241: zlog_debug ("%s", ip6);
242: }
243: }
244: #endif /* HAVE_IPV6 */
245: zlog_debug ("Speaks: %s", nlpid2string (&adj->nlpids));
246:
247: return;
248: }
249:
250: int
251: isis_adj_expire (struct thread *thread)
252: {
253: struct isis_adjacency *adj;
254: int level;
255:
256: /*
257: * Get the adjacency
258: */
259: adj = THREAD_ARG (thread);
260: assert (adj);
261: level = adj->level;
262: adj->t_expire = NULL;
263:
264: /* trigger the adj expire event */
265: isis_adj_state_change (adj, ISIS_ADJ_DOWN, "holding time expired");
266:
267: return 0;
268: }
269:
270: static const char *
271: adj_state2string (int state)
272: {
273:
274: switch (state)
275: {
276: case ISIS_ADJ_INITIALIZING:
277: return "Initializing";
278: case ISIS_ADJ_UP:
279: return "Up";
280: case ISIS_ADJ_DOWN:
281: return "Down";
282: default:
283: return "Unknown";
284: }
285:
286: return NULL; /* not reached */
287: }
288:
289: /*
290: * show clns/isis neighbor (detail)
291: */
292: static void
293: isis_adj_print_vty2 (struct isis_adjacency *adj, struct vty *vty, char detail)
294: {
295:
296: #ifdef HAVE_IPV6
297: struct in6_addr *ipv6_addr;
298: u_char ip6[INET6_ADDRSTRLEN];
299: #endif /* HAVE_IPV6 */
300: struct in_addr *ip_addr;
301: time_t now;
302: struct isis_dynhn *dyn;
303: int level;
304: struct listnode *node;
305:
306: dyn = dynhn_find_by_id (adj->sysid);
307: if (dyn)
308: vty_out (vty, " %-20s", dyn->name.name);
309: else if (adj->sysid)
310: {
311: vty_out (vty, " %-20s", sysid_print (adj->sysid));
312: }
313: else
314: {
315: vty_out (vty, " unknown ");
316: }
317:
318: if (detail == ISIS_UI_LEVEL_BRIEF)
319: {
320: if (adj->circuit)
321: vty_out (vty, "%-12s", adj->circuit->interface->name);
322: else
323: vty_out (vty, "NULL circuit!");
324: vty_out (vty, "%-3u", adj->level); /* level */
325: vty_out (vty, "%-13s", adj_state2string (adj->adj_state));
326: now = time (NULL);
327: if (adj->last_upd)
328: vty_out (vty, "%-9lu", adj->last_upd + adj->hold_time - now);
329: else
330: vty_out (vty, "- ");
331: vty_out (vty, "%-10s", snpa_print (adj->snpa));
332: vty_out (vty, "%s", VTY_NEWLINE);
333: }
334:
335: if (detail == ISIS_UI_LEVEL_DETAIL)
336: {
337: level = adj->level;
338: if (adj->circuit)
339: vty_out (vty, "%s Interface: %s", VTY_NEWLINE, adj->circuit->interface->name); /* interface name */
340: else
341: vty_out (vty, "NULL circuit!%s", VTY_NEWLINE);
342: vty_out (vty, ", Level: %u", adj->level); /* level */
343: vty_out (vty, ", State: %s", adj_state2string (adj->adj_state));
344: now = time (NULL);
345: if (adj->last_upd)
346: vty_out (vty, ", Expires in %s",
347: time2string (adj->last_upd + adj->hold_time - now));
348: else
349: vty_out (vty, ", Expires in %s", time2string (adj->hold_time));
350: vty_out (vty, "%s Adjacency flaps: %u", VTY_NEWLINE, adj->flaps);
351: vty_out (vty, ", Last: %s ago", time2string (now - adj->last_flap));
352: vty_out (vty, "%s Circuit type: %s",
353: VTY_NEWLINE, circuit_t2string (adj->circuit_t));
354: vty_out (vty, ", Speaks: %s", nlpid2string (&adj->nlpids));
355: vty_out (vty, "%s SNPA: %s", VTY_NEWLINE, snpa_print (adj->snpa));
356: dyn = dynhn_find_by_id (adj->lanid);
357: if (dyn)
358: vty_out (vty, ", LAN id: %s.%02x",
359: dyn->name.name, adj->lanid[ISIS_SYS_ID_LEN]);
360: else
361: vty_out (vty, ", LAN id: %s.%02x",
362: sysid_print (adj->lanid), adj->lanid[ISIS_SYS_ID_LEN]);
363:
364: vty_out (vty, "%s Priority: %u",
365: VTY_NEWLINE, adj->prio[adj->level - 1]);
366:
367: vty_out (vty, ", %s, DIS flaps: %u, Last: %s ago%s",
368: isis_disflag2string (adj->dis_record[ISIS_LEVELS + level - 1].
369: dis), adj->dischanges[level - 1],
370: time2string (now -
371: (adj->dis_record[ISIS_LEVELS + level - 1].
372: last_dis_change)), VTY_NEWLINE);
373:
374: if (adj->ipv4_addrs && listcount (adj->ipv4_addrs) > 0)
375: {
376: vty_out (vty, " IPv4 Addresses:%s", VTY_NEWLINE);
377: for (ALL_LIST_ELEMENTS_RO (adj->ipv4_addrs, node, ip_addr))
378: vty_out (vty, " %s%s", inet_ntoa (*ip_addr), VTY_NEWLINE);
379: }
380: #ifdef HAVE_IPV6
381: if (adj->ipv6_addrs && listcount (adj->ipv6_addrs) > 0)
382: {
383: vty_out (vty, " IPv6 Addresses:%s", VTY_NEWLINE);
384: for (ALL_LIST_ELEMENTS_RO (adj->ipv6_addrs, node, ipv6_addr))
385: {
386: inet_ntop (AF_INET6, ipv6_addr, (char *)ip6, INET6_ADDRSTRLEN);
387: vty_out (vty, " %s%s", ip6, VTY_NEWLINE);
388: }
389: }
390: #endif /* HAVE_IPV6 */
391: vty_out (vty, "%s", VTY_NEWLINE);
392: }
393: return;
394: }
395:
396: void
397: isis_adj_print_vty (struct isis_adjacency *adj, struct vty *vty)
398: {
399: isis_adj_print_vty2 (adj, vty, ISIS_UI_LEVEL_BRIEF);
400: }
401:
402: void
403: isis_adj_print_vty_detail (struct isis_adjacency *adj, struct vty *vty)
404: {
405: isis_adj_print_vty2 (adj, vty, ISIS_UI_LEVEL_DETAIL);
406: }
407:
408: void
409: isis_adj_print_vty_extensive (struct isis_adjacency *adj, struct vty *vty)
410: {
411: isis_adj_print_vty2 (adj, vty, ISIS_UI_LEVEL_EXTENSIVE);
412: }
413:
414: void
415: isis_adj_p2p_print_vty (struct isis_adjacency *adj, struct vty *vty)
416: {
417: isis_adj_print_vty2 (adj, vty, ISIS_UI_LEVEL_BRIEF);
418: }
419:
420: void
421: isis_adj_p2p_print_vty_detail (struct isis_adjacency *adj, struct vty *vty)
422: {
423: isis_adj_print_vty2 (adj, vty, ISIS_UI_LEVEL_DETAIL);
424: }
425:
426: void
427: isis_adj_p2p_print_vty_extensive (struct isis_adjacency *adj, struct vty *vty)
428: {
429: isis_adj_print_vty2 (adj, vty, ISIS_UI_LEVEL_EXTENSIVE);
430: }
431:
432: void
433: isis_adjdb_iterate (struct list *adjdb, void (*func) (struct isis_adjacency *,
434: void *), void *arg)
435: {
436: struct listnode *node, *nnode;
437: struct isis_adjacency *adj;
438:
439: for (ALL_LIST_ELEMENTS (adjdb, node, nnode, adj))
440: (*func) (adj, arg);
441: }
442:
443: void
444: isis_adj_build_neigh_list (struct list *adjdb, struct list *list)
445: {
446: struct isis_adjacency *adj;
447: struct listnode *node;
448:
449: if (!list)
450: {
451: zlog_warn ("isis_adj_build_neigh_list(): NULL list");
452: return;
453: }
454:
455: for (ALL_LIST_ELEMENTS_RO (adjdb, node, adj))
456: {
457: if (!adj)
458: {
459: zlog_warn ("isis_adj_build_neigh_list(): NULL adj");
460: return;
461: }
462:
463: if ((adj->adj_state == ISIS_ADJ_UP ||
464: adj->adj_state == ISIS_ADJ_INITIALIZING))
465: listnode_add (list, adj->snpa);
466: }
467: return;
468: }
469:
470: void
471: isis_adj_build_up_list (struct list *adjdb, struct list *list)
472: {
473: struct isis_adjacency *adj;
474: struct listnode *node;
475:
476: if (!list)
477: {
478: zlog_warn ("isis_adj_build_up_list(): NULL list");
479: return;
480: }
481:
482: for (ALL_LIST_ELEMENTS_RO (adjdb, node, adj))
483: {
484: if (!adj)
485: {
486: zlog_warn ("isis_adj_build_up_list(): NULL adj");
487: return;
488: }
489:
490: if (adj->adj_state == ISIS_ADJ_UP)
491: listnode_add (list, adj);
492: }
493:
494: return;
495: }
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