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eb5d44eb | 1 | /* |
2 | * IS-IS Rout(e)ing protocol - isis_tlv.c | |
3 | * IS-IS TLV related routines | |
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. | |
896014f4 DL |
18 | * |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; see the file COPYING; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
eb5d44eb | 22 | */ |
23 | ||
24 | #include <zebra.h> | |
eb5d44eb | 25 | |
26 | #include "log.h" | |
27 | #include "linklist.h" | |
28 | #include "stream.h" | |
29 | #include "memory.h" | |
30 | #include "prefix.h" | |
31 | #include "vty.h" | |
32 | #include "if.h" | |
33 | ||
34 | #include "isisd/dict.h" | |
35 | #include "isisd/isis_constants.h" | |
36 | #include "isisd/isis_common.h" | |
37 | #include "isisd/isis_flags.h" | |
38 | #include "isisd/isis_circuit.h" | |
39 | #include "isisd/isis_tlv.h" | |
40 | #include "isisd/isisd.h" | |
41 | #include "isisd/isis_dynhn.h" | |
42 | #include "isisd/isis_misc.h" | |
43 | #include "isisd/isis_pdu.h" | |
44 | #include "isisd/isis_lsp.h" | |
f8c06e2c | 45 | #include "isisd/isis_te.h" |
206f4aae | 46 | #include "isisd/isis_mt.h" |
eb5d44eb | 47 | |
eb5d44eb | 48 | void |
49 | free_tlv (void *val) | |
50 | { | |
f390d2c7 | 51 | XFREE (MTYPE_ISIS_TLV, val); |
52 | ||
53 | return; | |
eb5d44eb | 54 | } |
55 | ||
56 | /* | |
57 | * Called after parsing of a PDU. There shouldn't be any tlv's left, so this | |
58 | * is only a caution to avoid memory leaks | |
59 | */ | |
f390d2c7 | 60 | void |
eb5d44eb | 61 | free_tlvs (struct tlvs *tlvs) |
62 | { | |
f390d2c7 | 63 | if (tlvs->area_addrs) |
aac372f4 | 64 | list_delete (tlvs->area_addrs); |
99894f9a CF |
65 | if (tlvs->mt_router_info) |
66 | list_delete (tlvs->mt_router_info); | |
f390d2c7 | 67 | if (tlvs->is_neighs) |
aac372f4 | 68 | list_delete (tlvs->is_neighs); |
f390d2c7 | 69 | if (tlvs->te_is_neighs) |
aac372f4 | 70 | list_delete (tlvs->te_is_neighs); |
206f4aae CF |
71 | if (tlvs->mt_is_neighs) |
72 | list_delete (tlvs->mt_is_neighs); | |
f390d2c7 | 73 | if (tlvs->es_neighs) |
aac372f4 | 74 | list_delete (tlvs->es_neighs); |
f390d2c7 | 75 | if (tlvs->lsp_entries) |
aac372f4 | 76 | list_delete (tlvs->lsp_entries); |
f390d2c7 | 77 | if (tlvs->prefix_neighs) |
aac372f4 | 78 | list_delete (tlvs->prefix_neighs); |
3f045a08 JB |
79 | if (tlvs->lan_neighs) |
80 | list_delete (tlvs->lan_neighs); | |
f390d2c7 | 81 | if (tlvs->ipv4_addrs) |
aac372f4 | 82 | list_delete (tlvs->ipv4_addrs); |
f390d2c7 | 83 | if (tlvs->ipv4_int_reachs) |
aac372f4 | 84 | list_delete (tlvs->ipv4_int_reachs); |
f390d2c7 | 85 | if (tlvs->ipv4_ext_reachs) |
aac372f4 | 86 | list_delete (tlvs->ipv4_ext_reachs); |
f390d2c7 | 87 | if (tlvs->te_ipv4_reachs) |
aac372f4 | 88 | list_delete (tlvs->te_ipv4_reachs); |
c3ae3127 CF |
89 | if (tlvs->mt_ipv4_reachs) |
90 | list_delete (tlvs->mt_ipv4_reachs); | |
f390d2c7 | 91 | if (tlvs->ipv6_addrs) |
aac372f4 | 92 | list_delete (tlvs->ipv6_addrs); |
f390d2c7 | 93 | if (tlvs->ipv6_reachs) |
aac372f4 | 94 | list_delete (tlvs->ipv6_reachs); |
c3ae3127 CF |
95 | if (tlvs->mt_ipv6_reachs) |
96 | list_delete (tlvs->mt_ipv6_reachs); | |
3f045a08 JB |
97 | |
98 | memset (tlvs, 0, sizeof (struct tlvs)); | |
99 | ||
eb5d44eb | 100 | return; |
101 | } | |
102 | ||
206f4aae | 103 | static int |
c3ae3127 CF |
104 | parse_mtid(uint16_t *mtid, bool read_mtid, |
105 | unsigned int *length, u_char **pnt) | |
206f4aae | 106 | { |
c3ae3127 | 107 | if (!read_mtid) |
206f4aae | 108 | { |
c3ae3127 CF |
109 | *mtid = ISIS_MT_IPV4_UNICAST; |
110 | return ISIS_OK; | |
111 | } | |
206f4aae | 112 | |
c3ae3127 | 113 | uint16_t mtid_buf; |
206f4aae | 114 | |
c3ae3127 | 115 | if (*length < sizeof(mtid_buf)) |
206f4aae | 116 | { |
c3ae3127 CF |
117 | zlog_warn("ISIS-TLV: mt tlv too short to contain MT id"); |
118 | return ISIS_WARNING; | |
206f4aae CF |
119 | } |
120 | ||
c3ae3127 CF |
121 | memcpy(&mtid_buf, *pnt, sizeof(mtid_buf)); |
122 | *pnt += sizeof(mtid_buf); | |
123 | *length -= sizeof(mtid_buf); | |
124 | ||
125 | *mtid = ntohs(mtid_buf) & ISIS_MT_MASK; | |
126 | return ISIS_OK; | |
127 | } | |
128 | ||
129 | static int | |
130 | parse_mt_is_neighs(struct tlvs *tlvs, bool read_mtid, | |
131 | unsigned int length, u_char *pnt) | |
132 | { | |
133 | struct list *neigh_list; | |
134 | uint16_t mtid; | |
135 | int rv; | |
136 | ||
137 | rv = parse_mtid(&mtid, read_mtid, &length, &pnt); | |
138 | if (rv != ISIS_OK) | |
139 | return rv; | |
140 | ||
206f4aae CF |
141 | if (mtid == ISIS_MT_IPV4_UNICAST) |
142 | { | |
143 | if (!tlvs->te_is_neighs) | |
144 | { | |
145 | tlvs->te_is_neighs = list_new(); | |
146 | tlvs->te_is_neighs->del = free_tlv; | |
147 | } | |
148 | neigh_list = tlvs->te_is_neighs; | |
149 | } | |
150 | else | |
151 | { | |
152 | struct tlv_mt_neighbors *neighbors; | |
153 | ||
154 | neighbors = tlvs_get_mt_neighbors(tlvs, mtid); | |
155 | neighbors->list->del = free_tlv; | |
156 | neigh_list = neighbors->list; | |
157 | } | |
158 | ||
159 | while (length >= IS_NEIGHBOURS_LEN) | |
160 | { | |
161 | struct te_is_neigh *neigh = XCALLOC(MTYPE_ISIS_TLV, sizeof(*neigh)); | |
162 | ||
163 | memcpy(neigh, pnt, IS_NEIGHBOURS_LEN); | |
164 | pnt += IS_NEIGHBOURS_LEN; | |
165 | length -= IS_NEIGHBOURS_LEN; | |
166 | ||
167 | if (neigh->sub_tlvs_length > length) | |
168 | { | |
169 | zlog_warn("ISIS-TLV: neighbor subtlv length exceeds TLV size"); | |
170 | XFREE(MTYPE_ISIS_TLV, neigh); | |
171 | return ISIS_WARNING; | |
172 | } | |
173 | ||
174 | memcpy(neigh->sub_tlvs, pnt, neigh->sub_tlvs_length); | |
175 | pnt += neigh->sub_tlvs_length; | |
176 | length -= neigh->sub_tlvs_length; | |
177 | ||
178 | listnode_add(neigh_list, neigh); | |
179 | } | |
180 | ||
181 | if (length) | |
182 | { | |
183 | zlog_warn("ISIS-TLV: TE/MT neighor TLV has trailing data"); | |
184 | return ISIS_WARNING; | |
185 | } | |
186 | ||
187 | return ISIS_OK; | |
188 | } | |
189 | ||
c3ae3127 CF |
190 | static int |
191 | parse_mt_ipv4_reachs(struct tlvs *tlvs, bool read_mtid, | |
192 | unsigned int length, u_char *pnt) | |
193 | { | |
194 | struct list *reach_list; | |
195 | uint16_t mtid; | |
196 | int rv; | |
197 | ||
198 | rv = parse_mtid(&mtid, read_mtid, &length, &pnt); | |
199 | if (rv != ISIS_OK) | |
200 | return rv; | |
201 | ||
202 | if (mtid == ISIS_MT_IPV4_UNICAST) | |
203 | { | |
204 | if (!tlvs->te_ipv4_reachs) | |
205 | { | |
206 | tlvs->te_ipv4_reachs = list_new(); | |
207 | tlvs->te_ipv4_reachs->del = free_tlv; | |
208 | } | |
209 | reach_list = tlvs->te_ipv4_reachs; | |
210 | } | |
211 | else | |
212 | { | |
213 | struct tlv_mt_ipv4_reachs *reachs; | |
214 | ||
215 | reachs = tlvs_get_mt_ipv4_reachs(tlvs, mtid); | |
216 | reachs->list->del = free_tlv; | |
217 | reach_list = reachs->list; | |
218 | } | |
219 | ||
220 | while (length >= 5) /* Metric + Control */ | |
221 | { | |
222 | struct te_ipv4_reachability *reach = XCALLOC(MTYPE_ISIS_TLV, TE_IPV4_REACH_LEN); | |
223 | ||
224 | memcpy(reach, pnt, 5); /* Metric + Control */ | |
225 | pnt += 5; | |
226 | length -= 5; | |
227 | ||
228 | unsigned char prefixlen = reach->control & 0x3F; | |
229 | ||
230 | if (prefixlen > IPV4_MAX_BITLEN) | |
231 | { | |
232 | zlog_warn("ISIS-TLV: invalid IPv4 extended reachability prefix length %d", prefixlen); | |
233 | XFREE(MTYPE_ISIS_TLV, reach); | |
234 | return ISIS_WARNING; | |
235 | } | |
236 | ||
237 | if (length < (unsigned int)PSIZE(prefixlen)) | |
238 | { | |
239 | zlog_warn("ISIS-TLV: invalid IPv4 extended reachability prefix too long for tlv"); | |
240 | XFREE(MTYPE_ISIS_TLV, reach); | |
241 | return ISIS_WARNING; | |
242 | } | |
243 | ||
244 | memcpy(&reach->prefix_start, pnt, PSIZE(prefixlen)); | |
245 | pnt += PSIZE(prefixlen); | |
246 | length -= PSIZE(prefixlen); | |
247 | ||
248 | if (reach->control & TE_IPV4_HAS_SUBTLV) | |
249 | { | |
250 | if (length < 1) | |
251 | { | |
252 | zlog_warn("ISIS-TLV: invalid IPv4 extended reachability SubTLV missing"); | |
253 | XFREE(MTYPE_ISIS_TLV, reach); | |
254 | return ISIS_WARNING; | |
255 | } | |
256 | ||
257 | u_char subtlv_len = *pnt; | |
258 | pnt++; | |
259 | length--; | |
260 | ||
261 | if (length < subtlv_len) | |
262 | { | |
263 | zlog_warn("ISIS-TLV: invalid IPv4 extended reachability SubTLVs have oversize"); | |
264 | XFREE(MTYPE_ISIS_TLV, reach); | |
265 | return ISIS_WARNING; | |
266 | } | |
267 | ||
268 | /* Skip Sub-TLVs for now */ | |
269 | pnt += subtlv_len; | |
270 | length -= subtlv_len; | |
271 | } | |
272 | listnode_add(reach_list, reach); | |
273 | } | |
274 | ||
275 | if (length) | |
276 | { | |
277 | zlog_warn("ISIS-TLV: TE/MT ipv4 reachability TLV has trailing data"); | |
278 | return ISIS_WARNING; | |
279 | } | |
280 | ||
281 | return ISIS_OK; | |
282 | } | |
283 | ||
284 | static int | |
285 | parse_mt_ipv6_reachs(struct tlvs *tlvs, bool read_mtid, | |
286 | unsigned int length, u_char *pnt) | |
287 | { | |
288 | struct list *reach_list; | |
289 | uint16_t mtid; | |
290 | int rv; | |
291 | ||
292 | rv = parse_mtid(&mtid, read_mtid, &length, &pnt); | |
293 | if (rv != ISIS_OK) | |
294 | return rv; | |
295 | ||
296 | if (mtid == ISIS_MT_IPV4_UNICAST) | |
297 | { | |
298 | if (!tlvs->ipv6_reachs) | |
299 | { | |
300 | tlvs->ipv6_reachs = list_new(); | |
301 | tlvs->ipv6_reachs->del = free_tlv; | |
302 | } | |
303 | reach_list = tlvs->ipv6_reachs; | |
304 | } | |
305 | else | |
306 | { | |
307 | struct tlv_mt_ipv6_reachs *reachs; | |
308 | ||
309 | reachs = tlvs_get_mt_ipv6_reachs(tlvs, mtid); | |
310 | reachs->list->del = free_tlv; | |
311 | reach_list = reachs->list; | |
312 | } | |
313 | ||
314 | while (length >= 6) /* Metric + Control + Prefixlen */ | |
315 | { | |
316 | struct ipv6_reachability *reach = XCALLOC(MTYPE_ISIS_TLV, sizeof(*reach)); | |
317 | ||
318 | memcpy(reach, pnt, 6); /* Metric + Control + Prefixlen */ | |
319 | pnt += 6; | |
320 | length -= 6; | |
321 | ||
322 | if (reach->prefix_len > IPV6_MAX_BITLEN) | |
323 | { | |
324 | zlog_warn("ISIS-TLV: invalid IPv6 reachability prefix length %d", reach->prefix_len); | |
325 | XFREE(MTYPE_ISIS_TLV, reach); | |
326 | return ISIS_WARNING; | |
327 | } | |
328 | ||
329 | if (length < (unsigned int)PSIZE(reach->prefix_len)) | |
330 | { | |
331 | zlog_warn("ISIS-TLV: invalid IPv6 reachability prefix too long for tlv"); | |
332 | XFREE(MTYPE_ISIS_TLV, reach); | |
333 | return ISIS_WARNING; | |
334 | } | |
335 | ||
336 | memcpy(&reach->prefix, pnt, PSIZE(reach->prefix_len)); | |
337 | pnt += PSIZE(reach->prefix_len); | |
338 | length -= PSIZE(reach->prefix_len); | |
339 | ||
340 | if (reach->control_info & CTRL_INFO_SUBTLVS) | |
341 | { | |
342 | if (length < 1) | |
343 | { | |
344 | zlog_warn("ISIS-TLV: invalid IPv6 reachability SubTLV missing"); | |
345 | XFREE(MTYPE_ISIS_TLV, reach); | |
346 | return ISIS_WARNING; | |
347 | } | |
348 | ||
349 | u_char subtlv_len = *pnt; | |
350 | pnt++; | |
351 | length--; | |
352 | ||
353 | if (length < subtlv_len) | |
354 | { | |
355 | zlog_warn("ISIS-TLV: invalid IPv6 reachability SubTLVs have oversize"); | |
356 | XFREE(MTYPE_ISIS_TLV, reach); | |
357 | return ISIS_WARNING; | |
358 | } | |
359 | ||
360 | /* Skip Sub-TLVs for now */ | |
361 | pnt += subtlv_len; | |
362 | length -= subtlv_len; | |
363 | } | |
364 | listnode_add(reach_list, reach); | |
365 | } | |
366 | ||
367 | if (length) | |
368 | { | |
369 | zlog_warn("ISIS-TLV: (MT) IPv6 reachability TLV has trailing data"); | |
370 | return ISIS_WARNING; | |
371 | } | |
372 | ||
373 | return ISIS_OK; | |
374 | } | |
375 | ||
eb5d44eb | 376 | /* |
377 | * Parses the tlvs found in the variant length part of the PDU. | |
378 | * Caller tells with flags in "expected" which TLV's it is interested in. | |
379 | */ | |
f390d2c7 | 380 | int |
381 | parse_tlvs (char *areatag, u_char * stream, int size, u_int32_t * expected, | |
3f045a08 | 382 | u_int32_t * found, struct tlvs *tlvs, u_int32_t *auth_tlv_offset) |
eb5d44eb | 383 | { |
f390d2c7 | 384 | u_char type, length; |
385 | struct lan_neigh *lan_nei; | |
386 | struct area_addr *area_addr; | |
387 | struct is_neigh *is_nei; | |
f390d2c7 | 388 | struct es_neigh *es_nei; |
389 | struct lsp_entry *lsp_entry; | |
390 | struct in_addr *ipv4_addr; | |
391 | struct ipv4_reachability *ipv4_reach; | |
f390d2c7 | 392 | struct in6_addr *ipv6_addr; |
f390d2c7 | 393 | int value_len, retval = ISIS_OK; |
c3ae3127 | 394 | u_char *start = stream, *pnt = stream; |
eb5d44eb | 395 | |
396 | *found = 0; | |
397 | memset (tlvs, 0, sizeof (struct tlvs)); | |
f390d2c7 | 398 | |
399 | while (pnt < stream + size - 2) | |
400 | { | |
401 | type = *pnt; | |
402 | length = *(pnt + 1); | |
403 | pnt += 2; | |
404 | value_len = 0; | |
405 | if (pnt + length > stream + size) | |
406 | { | |
407 | zlog_warn ("ISIS-TLV (%s): TLV (type %d, length %d) exceeds packet " | |
408 | "boundaries", areatag, type, length); | |
409 | retval = ISIS_WARNING; | |
410 | break; | |
411 | } | |
412 | switch (type) | |
413 | { | |
414 | case AREA_ADDRESSES: | |
415 | /* +-------+-------+-------+-------+-------+-------+-------+-------+ | |
416 | * | Address Length | | |
417 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
418 | * | Area Address | | |
419 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
420 | * : : | |
421 | */ | |
422 | *found |= TLVFLAG_AREA_ADDRS; | |
eb5d44eb | 423 | #ifdef EXTREME_TLV_DEBUG |
529d65b3 | 424 | zlog_debug ("TLV Area Adresses len %d", length); |
eb5d44eb | 425 | #endif /* EXTREME_TLV_DEBUG */ |
f390d2c7 | 426 | if (*expected & TLVFLAG_AREA_ADDRS) |
427 | { | |
428 | while (length > value_len) | |
429 | { | |
430 | area_addr = (struct area_addr *) pnt; | |
431 | value_len += area_addr->addr_len + 1; | |
432 | pnt += area_addr->addr_len + 1; | |
433 | if (!tlvs->area_addrs) | |
434 | tlvs->area_addrs = list_new (); | |
435 | listnode_add (tlvs->area_addrs, area_addr); | |
436 | } | |
437 | } | |
438 | else | |
439 | { | |
440 | pnt += length; | |
441 | } | |
442 | break; | |
443 | ||
444 | case IS_NEIGHBOURS: | |
445 | *found |= TLVFLAG_IS_NEIGHS; | |
eb5d44eb | 446 | #ifdef EXTREME_TLV_DEBUG |
529d65b3 | 447 | zlog_debug ("ISIS-TLV (%s): IS Neighbours length %d", |
448 | areatag, length); | |
eb5d44eb | 449 | #endif /* EXTREME_TLV_DEBUG */ |
f390d2c7 | 450 | if (TLVFLAG_IS_NEIGHS & *expected) |
451 | { | |
452 | /* +-------+-------+-------+-------+-------+-------+-------+-------+ | |
453 | * | Virtual Flag | | |
454 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
455 | */ | |
f390d2c7 | 456 | pnt++; |
457 | value_len++; | |
458 | /* +-------+-------+-------+-------+-------+-------+-------+-------+ | |
459 | * | 0 | I/E | Default Metric | | |
460 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
461 | * | S | I/E | Delay Metric | | |
462 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
463 | * | S | I/E | Expense Metric | | |
464 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
465 | * | S | I/E | Error Metric | | |
466 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
467 | * | Neighbour ID | | |
468 | * +---------------------------------------------------------------+ | |
469 | * : : | |
470 | */ | |
471 | while (length > value_len) | |
472 | { | |
473 | is_nei = (struct is_neigh *) pnt; | |
474 | value_len += 4 + ISIS_SYS_ID_LEN + 1; | |
475 | pnt += 4 + ISIS_SYS_ID_LEN + 1; | |
476 | if (!tlvs->is_neighs) | |
477 | tlvs->is_neighs = list_new (); | |
478 | listnode_add (tlvs->is_neighs, is_nei); | |
479 | } | |
480 | } | |
481 | else | |
482 | { | |
483 | pnt += length; | |
484 | } | |
485 | break; | |
486 | ||
487 | case TE_IS_NEIGHBOURS: | |
f390d2c7 | 488 | *found |= TLVFLAG_TE_IS_NEIGHS; |
eb5d44eb | 489 | #ifdef EXTREME_TLV_DEBUG |
529d65b3 | 490 | zlog_debug ("ISIS-TLV (%s): Extended IS Neighbours length %d", |
f390d2c7 | 491 | areatag, length); |
eb5d44eb | 492 | #endif /* EXTREME_TLV_DEBUG */ |
f390d2c7 | 493 | if (TLVFLAG_TE_IS_NEIGHS & *expected) |
206f4aae CF |
494 | retval = parse_mt_is_neighs(tlvs, false, length, pnt); |
495 | pnt += length; | |
496 | break; | |
497 | ||
498 | case MT_IS_NEIGHBOURS: | |
499 | *found |= TLVFLAG_TE_IS_NEIGHS; | |
500 | #ifdef EXTREME_TLV_DEBUG | |
501 | zlog_debug ("ISIS-TLV (%s): MT IS Neighbours length %d", | |
502 | areatag, length); | |
503 | #endif | |
504 | if (TLVFLAG_TE_IS_NEIGHS & *expected) | |
505 | retval = parse_mt_is_neighs(tlvs, true, length, pnt); | |
506 | pnt += length; | |
f390d2c7 | 507 | break; |
508 | ||
509 | case ES_NEIGHBOURS: | |
510 | /* +-------+-------+-------+-------+-------+-------+-------+-------+ | |
511 | * | 0 | I/E | Default Metric | | |
512 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
513 | * | S | I/E | Delay Metric | | |
514 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
515 | * | S | I/E | Expense Metric | | |
516 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
517 | * | S | I/E | Error Metric | | |
518 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
519 | * | Neighbour ID | | |
520 | * +---------------------------------------------------------------+ | |
521 | * | Neighbour ID | | |
522 | * +---------------------------------------------------------------+ | |
523 | * : : | |
524 | */ | |
eb5d44eb | 525 | #ifdef EXTREME_TLV_DEBUG |
529d65b3 | 526 | zlog_debug ("ISIS-TLV (%s): ES Neighbours length %d", |
f390d2c7 | 527 | areatag, length); |
eb5d44eb | 528 | #endif /* EXTREME_TLV_DEBUG */ |
f390d2c7 | 529 | *found |= TLVFLAG_ES_NEIGHS; |
530 | if (*expected & TLVFLAG_ES_NEIGHS) | |
531 | { | |
532 | es_nei = (struct es_neigh *) pnt; | |
533 | value_len += 4; | |
534 | pnt += 4; | |
535 | while (length > value_len) | |
536 | { | |
537 | /* FIXME FIXME FIXME - add to the list */ | |
538 | /* sys_id->id = pnt; */ | |
539 | value_len += ISIS_SYS_ID_LEN; | |
540 | pnt += ISIS_SYS_ID_LEN; | |
541 | /* if (!es_nei->neigh_ids) es_nei->neigh_ids = sysid; */ | |
542 | } | |
543 | if (!tlvs->es_neighs) | |
544 | tlvs->es_neighs = list_new (); | |
545 | listnode_add (tlvs->es_neighs, es_nei); | |
546 | } | |
547 | else | |
548 | { | |
549 | pnt += length; | |
550 | } | |
551 | break; | |
552 | ||
553 | case LAN_NEIGHBOURS: | |
554 | /* +-------+-------+-------+-------+-------+-------+-------+-------+ | |
555 | * | LAN Address | | |
556 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
557 | * : : | |
558 | */ | |
559 | *found |= TLVFLAG_LAN_NEIGHS; | |
eb5d44eb | 560 | #ifdef EXTREME_TLV_DEBUG |
529d65b3 | 561 | zlog_debug ("ISIS-TLV (%s): LAN Neigbours length %d", |
562 | areatag, length); | |
eb5d44eb | 563 | #endif /* EXTREME_TLV_DEBUG */ |
f390d2c7 | 564 | if (TLVFLAG_LAN_NEIGHS & *expected) |
565 | { | |
566 | while (length > value_len) | |
567 | { | |
568 | lan_nei = (struct lan_neigh *) pnt; | |
569 | if (!tlvs->lan_neighs) | |
570 | tlvs->lan_neighs = list_new (); | |
571 | listnode_add (tlvs->lan_neighs, lan_nei); | |
572 | value_len += ETH_ALEN; | |
573 | pnt += ETH_ALEN; | |
574 | } | |
575 | } | |
576 | else | |
577 | { | |
578 | pnt += length; | |
579 | } | |
580 | break; | |
581 | ||
582 | case PADDING: | |
eb5d44eb | 583 | #ifdef EXTREME_TLV_DEBUG |
529d65b3 | 584 | zlog_debug ("TLV padding %d", length); |
eb5d44eb | 585 | #endif /* EXTREME_TLV_DEBUG */ |
f390d2c7 | 586 | pnt += length; |
587 | break; | |
588 | ||
589 | case LSP_ENTRIES: | |
590 | /* +-------+-------+-------+-------+-------+-------+-------+-------+ | |
591 | * | Remaining Lifetime | 2 | |
592 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
593 | * | LSP ID | id+2 | |
594 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
595 | Content-type: text/html ]>