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7ef5fefc CF |
1 | /* |
2 | * IS-IS TLV Serializer/Deserializer | |
3 | * | |
4 | * Copyright (C) 2015,2017 Christian Franke | |
5 | * | |
6 | * This file is part of FRR. | |
7 | * | |
8 | * FRR is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2, or (at your option) any | |
11 | * later version. | |
12 | * | |
13 | * FRR is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with FRR; see the file COPYING. If not, write to the Free | |
20 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
21 | * 02111-1307, USA. | |
22 | */ | |
23 | #include <zebra.h> | |
24 | ||
25 | #include "md5.h" | |
26 | #include "memory.h" | |
27 | #include "stream.h" | |
28 | #include "sbuf.h" | |
29 | ||
30 | #include "isisd/isisd.h" | |
31 | #include "isisd/isis_memory.h" | |
841791b6 | 32 | #include "isisd/isis_tlvs.h" |
7ef5fefc CF |
33 | #include "isisd/isis_common.h" |
34 | #include "isisd/isis_mt.h" | |
35 | #include "isisd/isis_misc.h" | |
36 | #include "isisd/isis_adjacency.h" | |
37 | #include "isisd/isis_circuit.h" | |
38 | #include "isisd/isis_pdu.h" | |
39 | #include "isisd/isis_lsp.h" | |
40 | #include "isisd/isis_te.h" | |
41 | ||
841791b6 | 42 | DEFINE_MTYPE_STATIC(ISISD, ISIS_TLV, "ISIS TLVs") |
7ef5fefc CF |
43 | DEFINE_MTYPE_STATIC(ISISD, ISIS_SUBTLV, "ISIS Sub-TLVs") |
44 | DEFINE_MTYPE_STATIC(ISISD, ISIS_MT_ITEM_LIST, "ISIS MT Item Lists") | |
45 | ||
46 | typedef int (*unpack_tlv_func)(enum isis_tlv_context context, uint8_t tlv_type, | |
47 | uint8_t tlv_len, struct stream *s, | |
48 | struct sbuf *log, void *dest, int indent); | |
49 | typedef int (*pack_item_func)(struct isis_item *item, struct stream *s); | |
50 | typedef void (*free_item_func)(struct isis_item *i); | |
51 | typedef int (*unpack_item_func)(uint16_t mtid, uint8_t len, struct stream *s, | |
52 | struct sbuf *log, void *dest, int indent); | |
53 | typedef void (*format_item_func)(uint16_t mtid, struct isis_item *i, | |
54 | struct sbuf *buf, int indent); | |
55 | typedef struct isis_item *(*copy_item_func)(struct isis_item *i); | |
56 | ||
57 | struct tlv_ops { | |
58 | const char *name; | |
59 | unpack_tlv_func unpack; | |
60 | ||
61 | pack_item_func pack_item; | |
62 | free_item_func free_item; | |
63 | unpack_item_func unpack_item; | |
64 | format_item_func format_item; | |
65 | copy_item_func copy_item; | |
66 | }; | |
67 | ||
68 | enum how_to_pack { | |
69 | ISIS_ITEMS, | |
70 | ISIS_MT_ITEMS, | |
71 | }; | |
72 | ||
73 | struct pack_order_entry { | |
74 | enum isis_tlv_context context; | |
75 | enum isis_tlv_type type; | |
76 | enum how_to_pack how_to_pack; | |
77 | size_t what_to_pack; | |
78 | }; | |
79 | #define PACK_ENTRY(t, h, w) \ | |
80 | { \ | |
81 | .context = ISIS_CONTEXT_LSP, .type = ISIS_TLV_##t, \ | |
82 | .how_to_pack = (h), \ | |
83 | .what_to_pack = offsetof(struct isis_tlvs, w), \ | |
84 | } | |
85 | ||
86 | static struct pack_order_entry pack_order[] = { | |
87 | PACK_ENTRY(OLDSTYLE_REACH, ISIS_ITEMS, oldstyle_reach), | |
88 | PACK_ENTRY(LAN_NEIGHBORS, ISIS_ITEMS, lan_neighbor), | |
89 | PACK_ENTRY(LSP_ENTRY, ISIS_ITEMS, lsp_entries), | |
90 | PACK_ENTRY(EXTENDED_REACH, ISIS_ITEMS, extended_reach), | |
91 | PACK_ENTRY(MT_REACH, ISIS_MT_ITEMS, mt_reach), | |
92 | PACK_ENTRY(OLDSTYLE_IP_REACH, ISIS_ITEMS, oldstyle_ip_reach), | |
93 | PACK_ENTRY(OLDSTYLE_IP_REACH_EXT, ISIS_ITEMS, oldstyle_ip_reach_ext), | |
94 | PACK_ENTRY(IPV4_ADDRESS, ISIS_ITEMS, ipv4_address), | |
95 | PACK_ENTRY(IPV6_ADDRESS, ISIS_ITEMS, ipv6_address), | |
96 | PACK_ENTRY(EXTENDED_IP_REACH, ISIS_ITEMS, extended_ip_reach), | |
97 | PACK_ENTRY(MT_IP_REACH, ISIS_MT_ITEMS, mt_ip_reach), | |
98 | PACK_ENTRY(IPV6_REACH, ISIS_ITEMS, ipv6_reach), | |
99 | PACK_ENTRY(MT_IPV6_REACH, ISIS_MT_ITEMS, mt_ipv6_reach)}; | |
100 | ||
101 | /* This is a forward definition. The table is actually initialized | |
102 | * in at the bottom. */ | |
103 | static const struct tlv_ops *tlv_table[ISIS_CONTEXT_MAX][ISIS_TLV_MAX]; | |
104 | ||
105 | /* End of _ops forward definition. */ | |
106 | ||
107 | /* Prototypes */ | |
108 | static void append_item(struct isis_item_list *dest, struct isis_item *item); | |
109 | ||
110 | /* Functions for Sub-TVL ??? IPv6 Source Prefix */ | |
111 | ||
112 | static struct prefix_ipv6 *copy_subtlv_ipv6_source_prefix(struct prefix_ipv6 *p) | |
113 | { | |
114 | if (!p) | |
115 | return NULL; | |
116 | ||
117 | struct prefix_ipv6 *rv = XCALLOC(MTYPE_ISIS_SUBTLV, sizeof(*rv)); | |
118 | rv->family = p->family; | |
119 | rv->prefixlen = p->prefixlen; | |
120 | memcpy(&rv->prefix, &p->prefix, sizeof(rv->prefix)); | |
121 | return rv; | |
122 | } | |
123 | ||
124 | static void format_subtlv_ipv6_source_prefix(struct prefix_ipv6 *p, | |
125 | struct sbuf *buf, int indent) | |
126 | { | |
127 | if (!p) | |
128 | return; | |
129 | ||
130 | char prefixbuf[PREFIX2STR_BUFFER]; | |
131 | sbuf_push(buf, indent, "IPv6 Source Prefix: %s\n", | |
132 | prefix2str(p, prefixbuf, sizeof(prefixbuf))); | |
133 | } | |
134 | ||
135 | static int pack_subtlv_ipv6_source_prefix(struct prefix_ipv6 *p, | |
136 | struct stream *s) | |
137 | { | |
138 | if (!p) | |
139 | return 0; | |
140 | ||
141 | if (STREAM_WRITEABLE(s) < 3 + (unsigned)PSIZE(p->prefixlen)) | |
142 | return 1; | |
143 | ||
144 | stream_putc(s, ISIS_SUBTLV_IPV6_SOURCE_PREFIX); | |
145 | stream_putc(s, 1 + PSIZE(p->prefixlen)); | |
146 | stream_putc(s, p->prefixlen); | |
147 | stream_put(s, &p->prefix, PSIZE(p->prefixlen)); | |
148 | return 0; | |
149 | } | |
150 | ||
151 | static int unpack_subtlv_ipv6_source_prefix(enum isis_tlv_context context, | |
152 | uint8_t tlv_type, uint8_t tlv_len, | |
153 | struct stream *s, struct sbuf *log, | |
154 | void *dest, int indent) | |
155 | { | |
156 | struct isis_subtlvs *subtlvs = dest; | |
157 | struct prefix_ipv6 p = { | |
158 | .family = AF_INET6, | |
159 | }; | |
160 | ||
161 | sbuf_push(log, indent, "Unpacking IPv6 Source Prefix Sub-TLV...\n"); | |
162 | ||
163 | if (tlv_len < 1) { | |
996c9314 LB |
164 | sbuf_push( |
165 | log, indent, | |
166 | "Not enough data left. (expected 1 or more bytes, got %" PRIu8 | |
167 | ")\n", | |
168 | tlv_len); | |
7ef5fefc CF |
169 | return 1; |
170 | } | |
171 | ||
172 | p.prefixlen = stream_getc(s); | |
173 | if (p.prefixlen > 128) { | |
174 | sbuf_push(log, indent, "Prefixlen %u is inplausible for IPv6\n", | |
175 | p.prefixlen); | |
176 | return 1; | |
177 | } | |
178 | ||
179 | if (tlv_len != 1 + PSIZE(p.prefixlen)) { | |
180 | sbuf_push( | |
181 | log, indent, | |
182 | "TLV size differs from expected size for the prefixlen. " | |
183 | "(expected %u but got %" PRIu8 ")\n", | |
184 | 1 + PSIZE(p.prefixlen), tlv_len); | |
185 | return 1; | |
186 | } | |
187 | ||
188 | stream_get(&p.prefix, s, PSIZE(p.prefixlen)); | |
189 | ||
190 | if (subtlvs->source_prefix) { | |
191 | sbuf_push( | |
192 | log, indent, | |
193 | "WARNING: source prefix Sub-TLV present multiple times.\n"); | |
194 | /* Ignore all but first occurrence of the source prefix Sub-TLV | |
195 | */ | |
196 | return 0; | |
197 | } | |
198 | ||
199 | subtlvs->source_prefix = XCALLOC(MTYPE_ISIS_SUBTLV, sizeof(p)); | |
200 | memcpy(subtlvs->source_prefix, &p, sizeof(p)); | |
201 | return 0; | |
202 | } | |
203 | ||
204 | /* Functions related to subtlvs */ | |
205 | ||
206 | static struct isis_subtlvs *isis_alloc_subtlvs(void) | |
207 | { | |
208 | struct isis_subtlvs *result; | |
209 | ||
210 | result = XCALLOC(MTYPE_ISIS_SUBTLV, sizeof(*result)); | |
211 | ||
212 | return result; | |
213 | } | |
214 | ||
215 | static struct isis_subtlvs *copy_subtlvs(struct isis_subtlvs *subtlvs) | |
216 | { | |
217 | if (!subtlvs) | |
218 | return NULL; | |
219 | ||
220 | struct isis_subtlvs *rv = XCALLOC(MTYPE_ISIS_SUBTLV, sizeof(*rv)); | |
221 | ||
222 | rv->source_prefix = | |
223 | copy_subtlv_ipv6_source_prefix(subtlvs->source_prefix); | |
224 | return rv; | |
225 | } | |
226 | ||
227 | static void format_subtlvs(struct isis_subtlvs *subtlvs, struct sbuf *buf, | |
228 | int indent) | |
229 | { | |
230 | format_subtlv_ipv6_source_prefix(subtlvs->source_prefix, buf, indent); | |
231 | } | |
232 | ||
233 | static void isis_free_subtlvs(struct isis_subtlvs *subtlvs) | |
234 | { | |
235 | if (!subtlvs) | |
236 | return; | |
237 | ||
238 | XFREE(MTYPE_ISIS_SUBTLV, subtlvs->source_prefix); | |
239 | ||
240 | XFREE(MTYPE_ISIS_SUBTLV, subtlvs); | |
241 | } | |
242 | ||
243 | static int pack_subtlvs(struct isis_subtlvs *subtlvs, struct stream *s) | |
244 | { | |
245 | int rv; | |
246 | size_t subtlv_len_pos = stream_get_endp(s); | |
247 | ||
248 | if (STREAM_WRITEABLE(s) < 1) | |
249 | return 1; | |
250 | ||
251 | stream_putc(s, 0); /* Put 0 as subtlvs length, filled in later */ | |
252 | ||
253 | rv = pack_subtlv_ipv6_source_prefix(subtlvs->source_prefix, s); | |
254 | if (rv) | |
255 | return rv; | |
256 | ||
257 | size_t subtlv_len = stream_get_endp(s) - subtlv_len_pos - 1; | |
258 | if (subtlv_len > 255) | |
259 | return 1; | |
260 | ||
261 | stream_putc_at(s, subtlv_len_pos, subtlv_len); | |
262 | return 0; | |
263 | } | |
264 | ||
265 | static int unpack_tlvs(enum isis_tlv_context context, size_t avail_len, | |
266 | struct stream *stream, struct sbuf *log, void *dest, | |
267 | int indent); | |
268 | ||
269 | /* Functions related to TLVs 1 Area Addresses */ | |
270 | ||
271 | static struct isis_item *copy_item_area_address(struct isis_item *i) | |
272 | { | |
273 | struct isis_area_address *addr = (struct isis_area_address *)i; | |
841791b6 | 274 | struct isis_area_address *rv = XCALLOC(MTYPE_ISIS_TLV, sizeof(*rv)); |
7ef5fefc CF |
275 | |
276 | rv->len = addr->len; | |
277 | memcpy(rv->addr, addr->addr, addr->len); | |
278 | return (struct isis_item *)rv; | |
279 | } | |
280 | ||
281 | static void format_item_area_address(uint16_t mtid, struct isis_item *i, | |
282 | struct sbuf *buf, int indent) | |
283 | { | |
284 | struct isis_area_address *addr = (struct isis_area_address *)i; | |
285 | ||
286 | sbuf_push(buf, indent, "Area Address: %s\n", | |
287 | isonet_print(addr->addr, addr->len)); | |
288 | } | |
289 | ||
290 | static void free_item_area_address(struct isis_item *i) | |
291 | { | |
841791b6 | 292 | XFREE(MTYPE_ISIS_TLV, i); |
7ef5fefc CF |
293 | } |
294 | ||
295 | static int pack_item_area_address(struct isis_item *i, struct stream *s) | |
296 | { | |
297 | struct isis_area_address *addr = (struct isis_area_address *)i; | |
298 | ||
299 | if (STREAM_WRITEABLE(s) < (unsigned)1 + addr->len) | |
300 | return 1; | |
301 | stream_putc(s, addr->len); | |
302 | stream_put(s, addr->addr, addr->len); | |
303 | return 0; | |
304 | } | |
305 | ||
306 | static int unpack_item_area_address(uint16_t mtid, uint8_t len, | |
307 | struct stream *s, struct sbuf *log, | |
308 | void *dest, int indent) | |
309 | { | |
310 | struct isis_tlvs *tlvs = dest; | |
311 | struct isis_area_address *rv = NULL; | |
312 | ||
313 | sbuf_push(log, indent, "Unpack area address...\n"); | |
314 | if (len < 1) { | |
315 | sbuf_push( | |
316 | log, indent, | |
317 | "Not enough data left. (Expected 1 byte of address length, got %" PRIu8 | |
318 | ")\n", | |
319 | len); | |
320 | goto out; | |
321 | } | |
322 | ||
841791b6 | 323 | rv = XCALLOC(MTYPE_ISIS_TLV, sizeof(*rv)); |
7ef5fefc CF |
324 | rv->len = stream_getc(s); |
325 | ||
326 | if (len < 1 + rv->len) { | |
327 | sbuf_push(log, indent, "Not enough data left. (Expected %" PRIu8 | |
328 | " bytes of address, got %" PRIu8 ")\n", | |
329 | rv->len, len - 1); | |
330 | goto out; | |
331 | } | |
332 | ||
333 | if (rv->len < 1 || rv->len > 20) { | |
334 | sbuf_push(log, indent, | |
335 | "Implausible area address length %" PRIu8 "\n", | |
336 | rv->len); | |
337 | goto out; | |
338 | } | |
339 | ||
340 | stream_get(rv->addr, s, rv->len); | |
341 | ||
342 | format_item_area_address(ISIS_MT_IPV4_UNICAST, (struct isis_item *)rv, | |
343 | log, indent + 2); | |
344 | append_item(&tlvs->area_addresses, (struct isis_item *)rv); | |
345 | return 0; | |
346 | out: | |
841791b6 | 347 | XFREE(MTYPE_ISIS_TLV, rv); |
7ef5fefc CF |
348 | return 1; |
349 | } | |
350 | ||
351 | /* Functions related to TLV 2 (Old-Style) IS Reach */ | |
352 | static struct isis_item *copy_item_oldstyle_reach(struct isis_item *i) | |
353 | { | |
354 | struct isis_oldstyle_reach *r = (struct isis_oldstyle_reach *)i; | |
841791b6 | 355 | struct isis_oldstyle_reach *rv = XCALLOC(MTYPE_ISIS_TLV, sizeof(*rv)); |
7ef5fefc CF |
356 | |
357 | memcpy(rv->id, r->id, 7); | |
358 | rv->metric = r->metric; | |
359 | return (struct isis_item *)rv; | |
360 | } | |
361 | ||
362 | static void format_item_oldstyle_reach(uint16_t mtid, struct isis_item *i, | |
363 | struct sbuf *buf, int indent) | |
364 | { | |
365 | struct isis_oldstyle_reach *r = (struct isis_oldstyle_reach *)i; | |
366 | ||
367 | sbuf_push(buf, indent, "IS Reachability: %s (Metric: %" PRIu8 ")\n", | |
368 | isis_format_id(r->id, 7), r->metric); | |
369 | } | |
370 | ||
371 | static void free_item_oldstyle_reach(struct isis_item *i) | |
372 | { | |
841791b6 | 373 | XFREE(MTYPE_ISIS_TLV, i); |
7ef5fefc CF |
374 | } |
375 | ||
376 | static int pack_item_oldstyle_reach(struct isis_item *i, struct stream *s) | |
377 | { | |
378 | struct isis_oldstyle_reach *r = (struct isis_oldstyle_reach *)i; | |
379 | ||
380 | if (STREAM_WRITEABLE(s) < 11) | |
381 | return 1; | |
382 | ||
383 | stream_putc(s, r->metric); | |
384 | stream_putc(s, 0x80); /* delay metric - unsupported */ | |
385 | stream_putc(s, 0x80); /* expense metric - unsupported */ | |
386 | stream_putc(s, 0x80); /* error metric - unsupported */ | |
387 | stream_put(s, r->id, 7); | |
388 | ||
389 | return 0; | |
390 | } | |
391 | ||
392 | static int unpack_item_oldstyle_reach(uint16_t mtid, uint8_t len, | |
393 | struct stream *s, struct sbuf *log, | |
394 | void *dest, int indent) | |
395 | { | |
396 | struct isis_tlvs *tlvs = dest; | |
397 | ||
398 | sbuf_push(log, indent, "Unpack oldstyle reach...\n"); | |
399 | if (len < 11) { | |
400 | sbuf_push( | |
401 | log, indent, | |
402 | "Not enough data left.(Expected 11 bytes of reach information, got %" PRIu8 | |
403 | ")\n", | |
404 | len); | |
405 | return 1; | |
406 | } | |
407 | ||
841791b6 | 408 | struct isis_oldstyle_reach *rv = XCALLOC(MTYPE_ISIS_TLV, sizeof(*rv)); |
7ef5fefc CF |
409 | rv->metric = stream_getc(s); |
410 | if ((rv->metric & 0x3f) != rv->metric) { | |
411 | sbuf_push(log, indent, "Metric has unplausible format\n"); | |
412 | rv->metric &= 0x3f; | |
413 | } | |
414 | stream_forward_getp(s, 3); /* Skip other metrics */ | |
415 | stream_get(rv->id, s, 7); | |
416 | ||
417 | format_item_oldstyle_reach(mtid, (struct isis_item *)rv, log, | |
418 | indent + 2); | |
419 | append_item(&tlvs->oldstyle_reach, (struct isis_item *)rv); | |
420 | return 0; | |
421 | } | |
422 | ||
423 | /* Functions related to TLV 6 LAN Neighbors */ | |
424 | static struct isis_item *copy_item_lan_neighbor(struct isis_item *i) | |
425 | { | |
426 | struct isis_lan_neighbor *n = (struct isis_lan_neighbor *)i; | |
841791b6 | 427 | struct isis_lan_neighbor *rv = XCALLOC(MTYPE_ISIS_TLV, sizeof(*rv)); |
7ef5fefc CF |
428 | |
429 | memcpy(rv->mac, n->mac, 6); | |
430 | return (struct isis_item *)rv; | |
431 | } | |
432 | ||
433 | static void format_item_lan_neighbor(uint16_t mtid, struct isis_item *i, | |
434 | struct sbuf *buf, int indent) | |
435 | { | |
436 | struct isis_lan_neighbor *n = (struct isis_lan_neighbor *)i; | |
437 | ||
438 | sbuf_push(buf, indent, "LAN Neighbor: %s\n", isis_format_id(n->mac, 6)); | |
439 | } | |
440 | ||
441 | static void free_item_lan_neighbor(struct isis_item *i) | |
442 | { | |
841791b6 | 443 | XFREE(MTYPE_ISIS_TLV, i); |
7ef5fefc CF |
444 | } |
445 | ||
446 | static int pack_item_lan_neighbor(struct isis_item *i, struct stream *s) | |
447 | { | |
448 | struct isis_lan_neighbor *n = (struct isis_lan_neighbor *)i; | |
449 | ||
450 | if (STREAM_WRITEABLE(s) < 6) | |
451 | return 1; | |
452 | ||
453 | stream_put(s, n->mac, 6); | |
454 | ||
455 | return 0; | |
456 | } | |
457 | ||
458 | static int unpack_item_lan_neighbor(uint16_t mtid, uint8_t len, | |
459 | struct stream *s, struct sbuf *log, | |
460 | void *dest, int indent) | |
461 | { | |
462 | struct isis_tlvs *tlvs = dest; | |
463 | ||
464 | sbuf_push(log, indent, "Unpack LAN neighbor...\n"); | |
465 | if (len < 6) { | |
466 | sbuf_push( | |
467 | log, indent, | |
468 | "Not enough data left.(Expected 6 bytes of mac, got %" PRIu8 | |
469 | ")\n", | |
470 | len); | |
471 | return 1; | |
472 | } | |
473 | ||
841791b6 | 474 | struct isis_lan_neighbor *rv = XCALLOC(MTYPE_ISIS_TLV, sizeof(*rv)); |
7ef5fefc CF |
475 | stream_get(rv->mac, s, 6); |
476 | ||
477 | format_item_lan_neighbor(mtid, (struct isis_item *)rv, log, indent + 2); | |
478 | append_item(&tlvs->lan_neighbor, (struct isis_item *)rv); | |
479 | return 0; | |
480 | } | |
481 | ||
482 | /* Functions related to TLV 9 LSP Entry */ | |
483 | static struct isis_item *copy_item_lsp_entry(struct isis_item *i) | |
484 | { | |
485 | struct isis_lsp_entry *e = (struct isis_lsp_entry *)i; | |
841791b6 | 486 | struct isis_lsp_entry *rv = XCALLOC(MTYPE_ISIS_TLV, sizeof(*rv)); |
7ef5fefc CF |
487 | |
488 | rv->rem_lifetime = e->rem_lifetime; | |
489 | memcpy(rv->id, e->id, sizeof(rv->id)); | |
490 | rv->seqno = e->seqno; | |
491 | rv->checksum = e->checksum; | |
492 | ||
493 | return (struct isis_item *)rv; | |
494 | } | |
495 | ||
496 | static void format_item_lsp_entry(uint16_t mtid, struct isis_item *i, | |
497 | struct sbuf *buf, int indent) | |
498 | { | |
499 | struct isis_lsp_entry *e = (struct isis_lsp_entry *)i; | |
500 | ||
996c9314 LB |
501 | sbuf_push(buf, indent, |
502 | "LSP Entry: %s, seq 0x%08" PRIx32 ", cksum 0x%04" PRIx16 | |
503 | ", lifetime %" PRIu16 "s\n", | |
7ef5fefc CF |
504 | isis_format_id(e->id, 8), e->seqno, e->checksum, |
505 | e->rem_lifetime); | |
506 | } | |
507 | ||
508 | static void free_item_lsp_entry(struct isis_item *i) | |
509 | { | |
841791b6 | 510 | XFREE(MTYPE_ISIS_TLV, i); |
7ef5fefc CF |
511 | } |
512 | ||
513 | static int pack_item_lsp_entry(struct isis_item *i, struct stream *s) | |
514 | { | |
515 | struct isis_lsp_entry *e = (struct isis_lsp_entry *)i; | |
516 | ||
517 | if (STREAM_WRITEABLE(s) < 16) | |
518 | return 1; | |
519 | ||
520 | stream_putw(s, e->rem_lifetime); | |
521 | stream_put(s, e->id, 8); | |
522 | stream_putl(s, e->seqno); | |
523 | stream_putw(s, e->checksum); | |
524 | ||
525 | return 0; | |
526 | } | |
527 | ||
528 | static int unpack_item_lsp_entry(uint16_t mtid, uint8_t len, struct stream *s, | |
529 | struct sbuf *log, void *dest, int indent) | |
530 | { | |
531 | struct isis_tlvs *tlvs = dest; | |
532 | ||
533 | sbuf_push(log, indent, "Unpack LSP entry...\n"); | |
534 | if (len < 16) { | |
535 | sbuf_push( | |
536 | log, indent, | |
537 | "Not enough data left. (Expected 16 bytes of LSP info, got %" PRIu8, | |
538 | len); | |
539 | return 1; | |
540 | } | |
541 | ||
841791b6 | 542 | struct isis_lsp_entry *rv = XCALLOC(MTYPE_ISIS_TLV, sizeof(*rv)); |
7ef5fefc CF |
543 | rv->rem_lifetime = stream_getw(s); |
544 | stream_get(rv->id, s, 8); | |
545 | rv->seqno = stream_getl(s); | |
546 | rv->checksum = stream_getw(s); | |
547 | ||
548 | format_item_lsp_entry(mtid, (struct isis_item *)rv, log, indent + 2); | |
549 | append_item(&tlvs->lsp_entries, (struct isis_item *)rv); | |
550 | return 0; | |
551 | } | |
552 | ||
553 | /* Functions related to TLVs 22/222 Extended Reach/MT Reach */ | |
554 | ||
555 | static struct isis_item *copy_item_extended_reach(struct isis_item *i) | |
556 | { | |
557 | struct isis_extended_reach *r = (struct isis_extended_reach *)i; | |
841791b6 | 558 | struct isis_extended_reach *rv = XCALLOC(MTYPE_ISIS_TLV, sizeof(*rv)); |
7ef5fefc CF |
559 | |
560 | memcpy(rv->id, r->id, 7); | |
561 | rv->metric = r->metric; | |
562 | ||
563 | if (r->subtlvs && r->subtlv_len) { | |
841791b6 | 564 | rv->subtlvs = XCALLOC(MTYPE_ISIS_TLV, r->subtlv_len); |
7ef5fefc CF |
565 | memcpy(rv->subtlvs, r->subtlvs, r->subtlv_len); |
566 | rv->subtlv_len = r->subtlv_len; | |
567 | } | |
568 | ||
569 | return (struct isis_item *)rv; | |
570 | } | |
571 | ||
572 | static void format_item_extended_reach(uint16_t mtid, struct isis_item *i, | |
573 | struct sbuf *buf, int indent) | |
574 | { | |
575 | struct isis_extended_reach *r = (struct isis_extended_reach *)i; | |
576 | ||
577 | sbuf_push(buf, indent, "%s Reachability: %s (Metric: %u)", | |
578 | (mtid == ISIS_MT_IPV4_UNICAST) ? "Extended" : "MT", | |
579 | isis_format_id(r->id, 7), r->metric); | |
580 | if (mtid != ISIS_MT_IPV4_UNICAST) | |
581 | sbuf_push(buf, 0, " %s", isis_mtid2str(mtid)); | |
582 | sbuf_push(buf, 0, "\n"); | |
583 | ||
584 | if (r->subtlv_len && r->subtlvs) | |
996c9314 LB |
585 | mpls_te_print_detail(buf, indent + 2, r->subtlvs, |
586 | r->subtlv_len); | |
7ef5fefc CF |
587 | } |
588 | ||
589 | static void free_item_extended_reach(struct isis_item *i) | |
590 | { | |
591 | struct isis_extended_reach *item = (struct isis_extended_reach *)i; | |
841791b6 CF |
592 | XFREE(MTYPE_ISIS_TLV, item->subtlvs); |
593 | XFREE(MTYPE_ISIS_TLV, item); | |
7ef5fefc CF |
594 | } |
595 | ||
596 | static int pack_item_extended_reach(struct isis_item *i, struct stream *s) | |
597 | { | |
598 | struct isis_extended_reach *r = (struct isis_extended_reach *)i; | |
599 | ||
600 | if (STREAM_WRITEABLE(s) < 11 + (unsigned)r->subtlv_len) | |
601 | return 1; | |
602 | stream_put(s, r->id, sizeof(r->id)); | |
603 | stream_put3(s, r->metric); | |
604 | stream_putc(s, r->subtlv_len); | |
605 | stream_put(s, r->subtlvs, r->subtlv_len); | |
606 | return 0; | |
607 | } | |
608 | ||
609 | static int unpack_item_extended_reach(uint16_t mtid, uint8_t len, | |
610 | struct stream *s, struct sbuf *log, | |
611 | void *dest, int indent) | |
612 | { | |
613 | struct isis_tlvs *tlvs = dest; | |
614 | struct isis_extended_reach *rv = NULL; | |
615 | uint8_t subtlv_len; | |
616 | struct isis_item_list *items; | |
617 | ||
618 | if (mtid == ISIS_MT_IPV4_UNICAST) { | |
619 | items = &tlvs->extended_reach; | |
620 | } else { | |
621 | items = isis_get_mt_items(&tlvs->mt_reach, mtid); | |
622 | } | |
623 | ||
624 | sbuf_push(log, indent, "Unpacking %s reachability...\n", | |
625 | (mtid == ISIS_MT_IPV4_UNICAST) ? "extended" : "mt"); | |
626 | ||
627 | if (len < 11) { | |
996c9314 LB |
628 | sbuf_push( |
629 | log, indent, | |
630 | "Not enough data left. (expected 11 or more bytes, got %" PRIu8 | |
631 | ")\n", | |
632 | len); | |
7ef5fefc CF |
633 | goto out; |
634 | } | |
635 | ||
841791b6 | 636 | rv = XCALLOC(MTYPE_ISIS_TLV, sizeof(*rv)); |
7ef5fefc CF |
637 | stream_get(rv->id, s, 7); |
638 | rv->metric = stream_get3(s); | |
639 | subtlv_len = stream_getc(s); | |
640 | ||
641 | format_item_extended_reach(mtid, (struct isis_item *)rv, log, | |
642 | indent + 2); | |
643 | ||
644 | if ((size_t)len < ((size_t)11) + subtlv_len) { | |
645 | sbuf_push(log, indent, | |
646 | "Not enough data left for subtlv size %" PRIu8 | |
647 | ", there are only %" PRIu8 " bytes left.\n", | |
648 | subtlv_len, len - 11); | |
649 | goto out; | |
650 | } | |
651 | ||
652 | sbuf_push(log, indent, "Storing %" PRIu8 " bytes of subtlvs\n", | |
653 | subtlv_len); | |
654 | ||
655 | if (subtlv_len) { | |
656 | size_t subtlv_start = stream_get_getp(s); | |
657 | ||
658 | if (unpack_tlvs(ISIS_CONTEXT_SUBTLV_NE_REACH, subtlv_len, s, | |
659 | log, NULL, indent + 4)) { | |
660 | goto out; | |
661 | } | |
662 | ||
663 | stream_set_getp(s, subtlv_start); | |
664 | ||
841791b6 | 665 | rv->subtlvs = XCALLOC(MTYPE_ISIS_TLV, subtlv_len); |
7ef5fefc CF |
666 | stream_get(rv->subtlvs, s, subtlv_len); |
667 | rv->subtlv_len = subtlv_len; | |
668 | } | |
669 | ||
670 | append_item(items, (struct isis_item *)rv); | |
671 | return 0; | |
672 | out: | |
673 | if (rv) | |
674 | free_item_extended_reach((struct isis_item *)rv); | |
675 | ||
676 | return 1; | |
677 | } | |
678 | ||
679 | /* Functions related to TLV 128 (Old-Style) IP Reach */ | |
680 | static struct isis_item *copy_item_oldstyle_ip_reach(struct isis_item *i) | |
681 | { | |
682 | struct isis_oldstyle_ip_reach *r = (struct isis_oldstyle_ip_reach *)i; | |
683 | struct isis_oldstyle_ip_reach *rv = | |
841791b6 | 684 | XCALLOC(MTYPE_ISIS_TLV, sizeof(*rv)); |
7ef5fefc CF |
685 | |
686 | rv->metric = r->metric; | |
687 | rv->prefix = r->prefix; | |
688 | return (struct isis_item *)rv; | |
689 | } | |
690 | ||
691 | static void format_item_oldstyle_ip_reach(uint16_t mtid, struct isis_item *i, | |
692 | struct sbuf *buf, int indent) | |
693 | { | |
694 | struct isis_oldstyle_ip_reach *r = (struct isis_oldstyle_ip_reach *)i; | |
695 | char prefixbuf[PREFIX2STR_BUFFER]; | |
696 | ||
697 | sbuf_push(buf, indent, "IP Reachability: %s (Metric: %" PRIu8 ")\n", | |
996c9314 LB |
698 | prefix2str(&r->prefix, prefixbuf, sizeof(prefixbuf)), |
699 | r->metric); | |
7ef5fefc CF |
700 | } |
701 | ||
702 | static void free_item_oldstyle_ip_reach(struct isis_item *i) | |
703 | { | |
841791b6 | 704 | XFREE(MTYPE_ISIS_TLV, i); |
7ef5fefc CF |
705 | } |
706 | ||
707 | static int pack_item_oldstyle_ip_reach(struct isis_item *i, struct stream *s) | |
708 | { | |
709 | struct isis_oldstyle_ip_reach *r = (struct isis_oldstyle_ip_reach *)i; | |
710 | ||
711 | if (STREAM_WRITEABLE(s) < 12) | |
712 | return 1; | |
713 | ||
714 | stream_putc(s, r->metric); | |
715 | stream_putc(s, 0x80); /* delay metric - unsupported */ | |
716 | stream_putc(s, 0x80); /* expense metric - unsupported */ | |
717 | stream_putc(s, 0x80); /* error metric - unsupported */ | |
718 | stream_put(s, &r->prefix.prefix, 4); | |
719 | ||
720 | struct in_addr mask; | |
721 | masklen2ip(r->prefix.prefixlen, &mask); | |
722 | stream_put(s, &mask, sizeof(mask)); | |
723 | ||
724 | return 0; | |
725 | } | |
726 | ||
727 | static int unpack_item_oldstyle_ip_reach(uint16_t mtid, uint8_t len, | |
728 | struct stream *s, struct sbuf *log, | |
729 | void *dest, int indent) | |
730 | { | |
731 | sbuf_push(log, indent, "Unpack oldstyle ip reach...\n"); | |
732 | if (len < 12) { | |
733 | sbuf_push( | |
734 | log, indent, | |
735 | "Not enough data left.(Expected 12 bytes of reach information, got %" PRIu8 | |
736 | ")\n", | |
737 | len); | |
738 | return 1; | |
739 | } | |
740 | ||
741 | struct isis_oldstyle_ip_reach *rv = | |
841791b6 | 742 | XCALLOC(MTYPE_ISIS_TLV, sizeof(*rv)); |
7ef5fefc CF |
743 | rv->metric = stream_getc(s); |
744 | if ((rv->metric & 0x7f) != rv->metric) { | |
745 | sbuf_push(log, indent, "Metric has unplausible format\n"); | |
746 | rv->metric &= 0x7f; | |
747 | } | |
748 | stream_forward_getp(s, 3); /* Skip other metrics */ | |
749 | rv->prefix.family = AF_INET; | |
750 | stream_get(&rv->prefix.prefix, s, 4); | |
751 | ||
752 | struct in_addr mask; | |
753 | stream_get(&mask, s, 4); | |
754 | rv->prefix.prefixlen = ip_masklen(mask); | |
755 | ||
756 | format_item_oldstyle_ip_reach(mtid, (struct isis_item *)rv, log, | |
757 | indent + 2); | |
758 | append_item(dest, (struct isis_item *)rv); | |
759 | return 0; | |
760 | } | |
761 | ||
762 | ||
763 | /* Functions related to TLV 129 protocols supported */ | |
764 | ||
765 | static void copy_tlv_protocols_supported(struct isis_protocols_supported *src, | |
766 | struct isis_protocols_supported *dest) | |
767 | { | |
768 | if (!src->protocols || !src->count) | |
769 | return; | |
770 | dest->count = src->count; | |
841791b6 | 771 | dest->protocols = XCALLOC(MTYPE_ISIS_TLV, src->count); |
7ef5fefc CF |
772 | memcpy(dest->protocols, src->protocols, src->count); |
773 | } | |
774 | ||
775 | static void format_tlv_protocols_supported(struct isis_protocols_supported *p, | |
776 | struct sbuf *buf, int indent) | |
777 | { | |
778 | if (!p || !p->count || !p->protocols) | |
779 | return; | |
780 | ||
781 | sbuf_push(buf, indent, "Protocols Supported: "); | |
782 | for (uint8_t i = 0; i < p->count; i++) { | |
783 | sbuf_push(buf, 0, "%s%s", nlpid2str(p->protocols[i]), | |
784 | (i + 1 < p->count) ? ", " : ""); | |
785 | } | |
786 | sbuf_push(buf, 0, "\n"); | |
787 | } | |
788 | ||
789 | static void free_tlv_protocols_supported(struct isis_protocols_supported *p) | |
790 | { | |
841791b6 | 791 | XFREE(MTYPE_ISIS_TLV, p->protocols); |
7ef5fefc CF |
792 | } |
793 | ||
794 | static int pack_tlv_protocols_supported(struct isis_protocols_supported *p, | |
795 | struct stream *s) | |
796 | { | |
797 | if (!p || !p->count || !p->protocols) | |
798 | return 0; | |
799 | ||
800 | if (STREAM_WRITEABLE(s) < (unsigned)(p->count + 2)) | |
801 | return 1; | |
802 | ||
803 | stream_putc(s, ISIS_TLV_PROTOCOLS_SUPPORTED); | |
804 | stream_putc(s, p->count); | |
805 | stream_put(s, p->protocols, p->count); | |
806 | return 0; | |
807 | } | |
808 | ||
809 | static int unpack_tlv_protocols_supported(enum isis_tlv_context context, | |
810 | uint8_t tlv_type, uint8_t tlv_len, | |
811 | struct stream *s, struct sbuf *log, | |
812 | void *dest, int indent) | |
813 | { | |
814 | struct isis_tlvs *tlvs = dest; | |
815 | ||
816 | sbuf_push(log, indent, "Unpacking Protocols Supported TLV...\n"); | |
817 | if (!tlv_len) { | |
818 | sbuf_push(log, indent, "WARNING: No protocols included\n"); | |
819 | return 0; | |
820 | } | |
821 | if (tlvs->protocols_supported.protocols) { | |
822 | sbuf_push( | |
823 | log, indent, | |
824 | "WARNING: protocols supported TLV present multiple times.\n"); | |
825 | stream_forward_getp(s, tlv_len); | |
826 | return 0; | |
827 | } | |
828 | ||
829 | tlvs->protocols_supported.count = tlv_len; | |
841791b6 | 830 | tlvs->protocols_supported.protocols = XCALLOC(MTYPE_ISIS_TLV, tlv_len); |
7ef5fefc CF |
831 | stream_get(tlvs->protocols_supported.protocols, s, tlv_len); |
832 | ||
833 | format_tlv_protocols_supported(&tlvs->protocols_supported, log, | |
834 | indent + 2); | |
835 | return 0; | |
836 | } | |
837 | ||
838 | /* Functions related to TLV 132 IPv4 Interface addresses */ | |
839 | static struct isis_item *copy_item_ipv4_address(struct isis_item *i) | |
840 | { | |
841 | struct isis_ipv4_address *a = (struct isis_ipv4_address *)i; | |
841791b6 | 842 | struct isis_ipv4_address *rv = XCALLOC(MTYPE_ISIS_TLV, sizeof(*rv)); |
7ef5fefc CF |
843 | |
844 | rv->addr = a->addr; | |
845 | return (struct isis_item *)rv; | |
846 | } | |
847 | ||
848 | static void format_item_ipv4_address(uint16_t mtid, struct isis_item *i, | |
849 | struct sbuf *buf, int indent) | |
850 | { | |
851 | struct isis_ipv4_address *a = (struct isis_ipv4_address *)i; | |
852 | char addrbuf[INET_ADDRSTRLEN]; | |
853 | ||
854 | inet_ntop(AF_INET, &a->addr, addrbuf, sizeof(addrbuf)); | |
855 | sbuf_push(buf, indent, "IPv4 Interface Address: %s\n", addrbuf); | |
856 | } | |
857 | ||
858 | static void free_item_ipv4_address(struct isis_item *i) | |
859 | { | |
841791b6 | 860 | XFREE(MTYPE_ISIS_TLV, i); |
7ef5fefc CF |
861 | } |
862 | ||
863 | static int pack_item_ipv4_address(struct isis_item *i, struct stream *s) | |
864 | { | |
865 | struct isis_ipv4_address *a = (struct isis_ipv4_address *)i; | |
866 | ||
867 | if (STREAM_WRITEABLE(s) < 4) | |
868 | return 1; | |
869 | ||
870 | stream_put(s, &a->addr, 4); | |
871 | ||
872 | return 0; | |
873 | } | |
874 | ||
875 | static int unpack_item_ipv4_address(uint16_t mtid, uint8_t len, | |
876 | struct stream *s, struct sbuf *log, | |
877 | void *dest, int indent) | |
878 | { | |
879 | struct isis_tlvs *tlvs = dest; | |
880 | ||
881 | sbuf_push(log, indent, "Unpack IPv4 Interface address...\n"); | |
882 | if (len < 4) { | |
883 | sbuf_push( | |
884 | log, indent, | |
885 | "Not enough data left.(Expected 4 bytes of IPv4 address, got %" PRIu8 | |
886 | ")\n", | |
887 | len); | |
888 | return 1; | |
889 | } | |
890 | ||
841791b6 | 891 | struct isis_ipv4_address *rv = XCALLOC(MTYPE_ISIS_TLV, sizeof(*rv)); |
7ef5fefc CF |
892 | stream_get(&rv->addr, s, 4); |
893 | ||
894 | format_item_ipv4_address(mtid, (struct isis_item *)rv, log, indent + 2); | |
895 | append_item(&tlvs->ipv4_address, (struct isis_item *)rv); | |
896 | return 0; | |
897 | } | |
898 | ||
899 | ||
900 | /* Functions related to TLV 232 IPv6 Interface addresses */ | |
901 | static struct isis_item *copy_item_ipv6_address(struct isis_item *i) | |
902 | { | |
903 | struct isis_ipv6_address *a = (struct isis_ipv6_address *)i; | |
841791b6 | 904 | struct isis_ipv6_address *rv = XCALLOC(MTYPE_ISIS_TLV, sizeof(*rv)); |
7ef5fefc CF |
905 | |
906 | rv->addr = a->addr; | |
907 | return (struct isis_item *)rv; | |
908 | } | |
909 | ||
910 | static void format_item_ipv6_address(uint16_t mtid, struct isis_item *i, | |
911 | struct sbuf *buf, int indent) | |
912 | { | |
913 | struct isis_ipv6_address *a = (struct isis_ipv6_address *)i; | |
914 | char addrbuf[INET6_ADDRSTRLEN]; | |
915 | ||
916 | inet_ntop(AF_INET6, &a->addr, addrbuf, sizeof(addrbuf)); | |
917 | sbuf_push(buf, indent, "IPv6 Interface Address: %s\n", addrbuf); | |
918 | } | |
919 | ||
920 | static void free_item_ipv6_address(struct isis_item *i) | |
921 | { | |
841791b6 | 922 | XFREE(MTYPE_ISIS_TLV, i); |
7ef5fefc CF |
923 | } |
924 | ||
925 | static int pack_item_ipv6_address(struct isis_item *i, struct stream *s) | |
926 | { | |
927 | struct isis_ipv6_address *a = (struct isis_ipv6_address *)i; | |
928 | ||
929 | if (STREAM_WRITEABLE(s) < 16) | |
930 | return 1; | |
931 | ||
932 | stream_put(s, &a->addr, 16); | |
933 | ||
934 | return 0; | |
935 | } | |
936 | ||
937 | static int unpack_item_ipv6_address(uint16_t mtid, uint8_t len, | |
938 | struct stream *s, struct sbuf *log, | |
939 | void *dest, int indent) | |
940 | { | |
941 | struct isis_tlvs *tlvs = dest; | |
942 | ||
943 | sbuf_push(log, indent, "Unpack IPv6 Interface address...\n"); | |
944 | if (len < 16) { | |
945 | sbuf_push( | |
946 | log, indent, | |
947 | "Not enough data left.(Expected 16 bytes of IPv6 address, got %" PRIu8 | |
948 | ")\n", | |
949 | len); | |
950 | return 1; | |
951 | } | |
952 | ||
841791b6 | 953 | struct isis_ipv6_address *rv = XCALLOC(MTYPE_ISIS_TLV, sizeof(*rv)); |
7ef5fefc CF |
954 | stream_get(&rv->addr, s, 16); |
955 | ||
956 | format_item_ipv6_address(mtid, (struct isis_item *)rv, log, indent + 2); | |
957 | append_item(&tlvs->ipv6_address, (struct isis_item *)rv); | |
958 | return 0; | |
959 | } | |
960 | ||
961 | ||
962 | /* Functions related to TLV 229 MT Router information */ | |
963 | static struct isis_item *copy_item_mt_router_info(struct isis_item *i) | |
964 | { | |
965 | struct isis_mt_router_info *info = (struct isis_mt_router_info *)i; | |
841791b6 | 966 | struct isis_mt_router_info *rv = XCALLOC(MTYPE_ISIS_TLV, sizeof(*rv)); |
7ef5fefc CF |
967 | |
968 | rv->overload = info->overload; | |
969 | rv->attached = info->attached; | |
970 | rv->mtid = info->mtid; | |
971 | return (struct isis_item *)rv; | |
972 | } | |
973 | ||
974 | static void format_item_mt_router_info(uint16_t mtid, struct isis_item *i, | |
975 | struct sbuf *buf, int indent) | |
976 | { | |
977 | struct isis_mt_router_info *info = (struct isis_mt_router_info *)i; | |
978 | ||
979 | sbuf_push(buf, indent, "MT Router Info: %s%s%s\n", | |
996c9314 | 980 | isis_mtid2str(info->mtid), info->overload ? " Overload" : "", |
7ef5fefc CF |
981 | info->attached ? " Attached" : ""); |
982 | } | |
983 | ||
984 | static void free_item_mt_router_info(struct isis_item *i) | |
985 | { | |
841791b6 | 986 | XFREE(MTYPE_ISIS_TLV, i); |
7ef5fefc CF |
987 | } |
988 | ||
989 | static int pack_item_mt_router_info(struct isis_item *i, struct stream *s) | |
990 | { | |
991 | struct isis_mt_router_info *info = (struct isis_mt_router_info *)i; | |
992 | ||
993 | if (STREAM_WRITEABLE(s) < 2) | |
994 | return 1; | |
995 | ||
996 | uint16_t entry = info->mtid; | |
997 | ||
998 | if (info->overload) | |
999 | entry |= ISIS_MT_OL_MASK; | |
1000 | if (info->attached) | |
1001 | entry |= ISIS_MT_AT_MASK; | |
1002 | ||
1003 | stream_putw(s, entry); | |
1004 | ||
1005 | return 0; | |
1006 | } | |
1007 | ||
1008 | static int unpack_item_mt_router_info(uint16_t mtid, uint8_t len, | |
1009 | struct stream *s, struct sbuf *log, | |
1010 | void *dest, int indent) | |
1011 | { | |
1012 | struct isis_tlvs *tlvs = dest; | |
1013 | ||
1014 | sbuf_push(log, indent, "Unpack MT Router info...\n"); | |
1015 | if (len < 2) { | |
1016 | sbuf_push( | |
1017 | log, indent, | |
1018 | "Not enough data left.(Expected 2 bytes of MT info, got %" PRIu8 | |
1019 | ")\n", | |
1020 | len); | |
1021 | return 1; | |
1022 | } | |
1023 | ||
841791b6 | 1024 | struct isis_mt_router_info *rv = XCALLOC(MTYPE_ISIS_TLV, sizeof(*rv)); |
7ef5fefc CF |
1025 | |
1026 | uint16_t entry = stream_getw(s); | |
1027 | rv->overload = entry & ISIS_MT_OL_MASK; | |
1028 | rv->attached = entry & ISIS_MT_AT_MASK; | |
1029 | rv->mtid = entry & ISIS_MT_MASK; | |
1030 | ||
1031 | format_item_mt_router_info(mtid, (struct isis_item *)rv, log, | |
1032 | indent + 2); | |
1033 | append_item(&tlvs->mt_router_info, (struct isis_item *)rv); | |
1034 | return 0; | |
1035 | } | |
1036 | ||
1037 | /* Functions related to TLV 134 TE Router ID */ | |
1038 | ||
1039 | static struct in_addr *copy_tlv_te_router_id(const struct in_addr *id) | |
1040 | { | |
1041 | if (!id) | |
1042 | return NULL; | |
1043 | ||
841791b6 | 1044 | struct in_addr *rv = XCALLOC(MTYPE_ISIS_TLV, sizeof(*rv)); |
7ef5fefc CF |
1045 | memcpy(rv, id, sizeof(*rv)); |
1046 | return rv; | |
1047 | } | |
1048 | ||
1049 | static void format_tlv_te_router_id(const struct in_addr *id, struct sbuf *buf, | |
1050 | int indent) | |
1051 | { | |
1052 | if (!id) | |
1053 | return; | |
1054 | ||
1055 | char addrbuf[INET_ADDRSTRLEN]; | |
1056 | inet_ntop(AF_INET, id, addrbuf, sizeof(addrbuf)); | |
1057 | sbuf_push(buf, indent, "TE Router ID: %s\n", addrbuf); | |
1058 | } | |
1059 | ||
1060 | static void free_tlv_te_router_id(struct in_addr *id) | |
1061 | { | |
841791b6 | 1062 | XFREE(MTYPE_ISIS_TLV, id); |
7ef5fefc CF |
1063 | } |
1064 | ||
1065 | static int pack_tlv_te_router_id(const struct in_addr *id, struct stream *s) | |
1066 | { | |
1067 | if (!id) | |
1068 | return 0; | |
1069 | ||
1070 | if (STREAM_WRITEABLE(s) < (unsigned)(2 + sizeof(*id))) | |
1071 | return 1; | |
1072 | ||
1073 | stream_putc(s, ISIS_TLV_TE_ROUTER_ID); | |
1074 | stream_putc(s, 4); | |
1075 | stream_put(s, id, 4); | |
1076 | return 0; | |
1077 | } | |
1078 | ||
1079 | static int unpack_tlv_te_router_id(enum isis_tlv_context context, | |
1080 | uint8_t tlv_type, uint8_t tlv_len, | |
1081 | struct stream *s, struct sbuf *log, | |
1082 | void *dest, int indent) | |
1083 | { | |
1084 | struct isis_tlvs *tlvs = dest; | |
1085 | ||
1086 | sbuf_push(log, indent, "Unpacking TE Router ID TLV...\n"); | |
1087 | if (tlv_len != 4) { | |
1088 | sbuf_push(log, indent, "WARNING: Length invalid\n"); | |
1089 | return 1; | |
1090 | } | |
1091 | ||
1092 | if (tlvs->te_router_id) { | |
1093 | sbuf_push(log, indent, | |
1094 | "WARNING: TE Router ID present multiple times.\n"); | |
1095 | stream_forward_getp(s, tlv_len); | |
1096 | return 0; | |
1097 | } | |
1098 | ||
841791b6 | 1099 | tlvs->te_router_id = XCALLOC(MTYPE_ISIS_TLV, 4); |
7ef5fefc CF |
1100 | stream_get(tlvs->te_router_id, s, 4); |
1101 | format_tlv_te_router_id(tlvs->te_router_id, log, indent + 2); | |
1102 | return 0; | |
1103 | } | |
1104 | ||
1105 | ||
1106 | /* Functions related to TLVs 135/235 extended IP reach/MT IP Reach */ | |
1107 | ||
1108 | static struct isis_item *copy_item_extended_ip_reach(struct isis_item *i) | |
1109 | { | |
1110 | struct isis_extended_ip_reach *r = (struct isis_extended_ip_reach *)i; | |
1111 | struct isis_extended_ip_reach *rv = | |
841791b6 | 1112 | XCALLOC(MTYPE_ISIS_TLV, sizeof(*rv)); |
7ef5fefc CF |
1113 | |
1114 | rv->metric = r->metric; | |
1115 | rv->down = r->down; | |
1116 | rv->prefix = r->prefix; | |
1117 | ||
1118 | return (struct isis_item *)rv; | |
1119 | } | |
1120 | ||
1121 | static void format_item_extended_ip_reach(uint16_t mtid, struct isis_item *i, | |
1122 | struct sbuf *buf, int indent) | |
1123 | { | |
1124 | struct isis_extended_ip_reach *r = (struct isis_extended_ip_reach *)i; | |
1125 | char prefixbuf[PREFIX2STR_BUFFER]; | |
1126 | ||
1127 | sbuf_push(buf, indent, "%s IP Reachability: %s (Metric: %u)%s", | |
1128 | (mtid == ISIS_MT_IPV4_UNICAST) ? "Extended" : "MT", | |
996c9314 LB |
1129 | prefix2str(&r->prefix, prefixbuf, sizeof(prefixbuf)), |
1130 | r->metric, r->down ? " Down" : ""); | |
7ef5fefc CF |
1131 | if (mtid != ISIS_MT_IPV4_UNICAST) |
1132 | sbuf_push(buf, 0, " %s", isis_mtid2str(mtid)); | |
1133 | sbuf_push(buf, 0, "\n"); | |
1134 | } | |
1135 | ||
1136 | static void free_item_extended_ip_reach(struct isis_item *i) | |
1137 | { | |
1138 | struct isis_extended_ip_reach *item = | |
1139 | (struct isis_extended_ip_reach *)i; | |
841791b6 | 1140 | XFREE(MTYPE_ISIS_TLV, item); |
7ef5fefc CF |
1141 | } |
1142 | ||
1143 | static int pack_item_extended_ip_reach(struct isis_item *i, struct stream *s) | |
1144 | { | |
1145 | struct isis_extended_ip_reach *r = (struct isis_extended_ip_reach *)i; | |
1146 | uint8_t control; | |
1147 | ||
1148 | if (STREAM_WRITEABLE(s) < 5) | |
1149 | return 1; | |
1150 | stream_putl(s, r->metric); | |
1151 | ||
1152 | control = r->down ? ISIS_EXTENDED_IP_REACH_DOWN : 0; | |
1153 | control |= r->prefix.prefixlen; | |
1154 | stream_putc(s, control); | |
1155 | ||
1156 | if (STREAM_WRITEABLE(s) < (unsigned)PSIZE(r->prefix.prefixlen)) | |
1157 | return 1; | |
1158 | stream_put(s, &r->prefix.prefix.s_addr, PSIZE(r->prefix.prefixlen)); | |
1159 | return 0; | |
1160 | } | |
1161 | ||
1162 | static int unpack_item_extended_ip_reach(uint16_t mtid, uint8_t len, | |
1163 | struct stream *s, struct sbuf *log, | |
1164 | void *dest, int indent) | |
1165 | { | |
1166 | struct isis_tlvs *tlvs = dest; | |
1167 | struct isis_extended_ip_reach *rv = NULL; | |
1168 | size_t consume; | |
1169 | uint8_t control, subtlv_len; | |
1170 | struct isis_item_list *items; | |
1171 | ||
1172 | if (mtid == ISIS_MT_IPV4_UNICAST) { | |
1173 | items = &tlvs->extended_ip_reach; | |
1174 | } else { | |
1175 | items = isis_get_mt_items(&tlvs->mt_ip_reach, mtid); | |
1176 | } | |
1177 | ||
1178 | sbuf_push(log, indent, "Unpacking %s IPv4 reachability...\n", | |
1179 | (mtid == ISIS_MT_IPV4_UNICAST) ? "extended" : "mt"); | |
1180 | ||
1181 | consume = 5; | |
1182 | if (len < consume) { | |
996c9314 LB |
1183 | sbuf_push( |
1184 | log, indent, | |
1185 | "Not enough data left. (expected 5 or more bytes, got %" PRIu8 | |
1186 | ")\n", | |
1187 | len); | |
7ef5fefc CF |
1188 | goto out; |
1189 | } | |
1190 | ||
841791b6 | 1191 | rv = XCALLOC(MTYPE_ISIS_TLV, sizeof(*rv)); |
7ef5fefc CF |
1192 | |
1193 | rv->metric = stream_getl(s); | |
1194 | control = stream_getc(s); | |
1195 | rv->down = (control & ISIS_EXTENDED_IP_REACH_DOWN); | |
1196 | rv->prefix.family = AF_INET; | |
1197 | rv->prefix.prefixlen = control & 0x3f; | |
1198 | if (rv->prefix.prefixlen > 32) { | |
1199 | sbuf_push(log, indent, "Prefixlen %u is inplausible for IPv4\n", | |
1200 | rv->prefix.prefixlen); | |
1201 | goto out; | |
1202 | } | |
1203 | ||
1204 | consume += PSIZE(rv->prefix.prefixlen); | |
1205 | if (len < consume) { | |
996c9314 LB |
1206 | sbuf_push( |
1207 | log, indent, | |
1208 | "Expected %u bytes of prefix, but only %u bytes available.\n", | |
1209 | PSIZE(rv->prefix.prefixlen), len - 5); | |
7ef5fefc CF |
1210 | goto out; |
1211 | } | |
1212 | stream_get(&rv->prefix.prefix.s_addr, s, PSIZE(rv->prefix.prefixlen)); | |
1213 | in_addr_t orig_prefix = rv->prefix.prefix.s_addr; | |
1214 | apply_mask_ipv4(&rv->prefix); | |
1215 | if (orig_prefix != rv->prefix.prefix.s_addr) | |
1216 | sbuf_push(log, indent + 2, | |
1217 | "WARNING: Prefix had hostbits set.\n"); | |
1218 | format_item_extended_ip_reach(mtid, (struct isis_item *)rv, log, | |
1219 | indent + 2); | |
1220 | ||
1221 | if (control & ISIS_EXTENDED_IP_REACH_SUBTLV) { | |
1222 | consume += 1; | |
1223 | if (len < consume) { | |
996c9314 LB |
1224 | sbuf_push( |
1225 | log, indent, | |
1226 | "Expected 1 byte of subtlv len, but no more data present.\n"); | |
7ef5fefc CF |
1227 | goto out; |
1228 | } | |
1229 | subtlv_len = stream_getc(s); | |
1230 | ||
1231 | if (!subtlv_len) { | |
996c9314 LB |
1232 | sbuf_push( |
1233 | log, indent + 2, | |
1234 | " WARNING: subtlv bit is set, but there are no subtlvs.\n"); | |
7ef5fefc CF |
1235 | } |
1236 | consume += subtlv_len; | |
1237 | if (len < consume) { | |
996c9314 LB |
1238 | sbuf_push( |
1239 | log, indent, | |
1240 | "Expected %" PRIu8 | |
1241 | " bytes of subtlvs, but only %u bytes available.\n", | |
1242 | subtlv_len, | |
1243 | len - 6 - PSIZE(rv->prefix.prefixlen)); | |
7ef5fefc CF |
1244 | goto out; |
1245 | } | |
1246 | sbuf_push(log, indent, "Skipping %" PRIu8 " bytes of subvls", | |
1247 | subtlv_len); | |
1248 | stream_forward_getp(s, subtlv_len); | |
1249 | } | |
1250 | ||
1251 | append_item(items, (struct isis_item *)rv); | |
1252 | return 0; | |
1253 | out: | |
1254 | if (rv) | |
1255 | free_item_extended_ip_reach((struct isis_item *)rv); | |
1256 | return 1; | |
1257 | } | |
1258 | ||
1259 | /* Functions related to TLV 137 Dynamic Hostname */ | |
1260 | ||
1261 | static char *copy_tlv_dynamic_hostname(const char *hostname) | |
1262 | { | |
1263 | if (!hostname) | |
1264 | return NULL; | |
1265 | ||
841791b6 | 1266 | return XSTRDUP(MTYPE_ISIS_TLV, hostname); |
7ef5fefc CF |
1267 | } |
1268 | ||
1269 | static void format_tlv_dynamic_hostname(const char *hostname, struct sbuf *buf, | |
1270 | int indent) | |
1271 | { | |
1272 | if (!hostname) | |
1273 | return; | |
1274 | ||
1275 | sbuf_push(buf, indent, "Hostname: %s\n", hostname); | |
1276 | } | |
1277 | ||
1278 | static void free_tlv_dynamic_hostname(char *hostname) | |
1279 | { | |
841791b6 | 1280 | XFREE(MTYPE_ISIS_TLV, hostname); |
7ef5fefc CF |
1281 | } |
1282 | ||
1283 | static int pack_tlv_dynamic_hostname(const char *hostname, struct stream *s) | |
1284 | { | |
1285 | if (!hostname) | |
1286 | return 0; | |
1287 | ||
1288 | uint8_t name_len = strlen(hostname); | |
1289 | ||
1290 | if (STREAM_WRITEABLE(s) < (unsigned)(2 + name_len)) | |
1291 | return 1; | |
1292 | ||
1293 | stream_putc(s, ISIS_TLV_DYNAMIC_HOSTNAME); | |
1294 | stream_putc(s, name_len); | |
1295 | stream_put(s, hostname, name_len); | |
1296 | return 0; | |
1297 | } | |
1298 | ||
1299 | static int unpack_tlv_dynamic_hostname(enum isis_tlv_context context, | |
1300 | uint8_t tlv_type, uint8_t tlv_len, | |
1301 | struct stream *s, struct sbuf *log, | |
1302 | void *dest, int indent) | |
1303 | { | |
1304 | struct isis_tlvs *tlvs = dest; | |
1305 | ||
1306 | sbuf_push(log, indent, "Unpacking Dynamic Hostname TLV...\n"); | |
1307 | if (!tlv_len) { | |
1308 | sbuf_push(log, indent, "WARNING: No hostname included\n"); | |
1309 | return 0; | |
1310 | } | |
1311 | ||
1312 | if (tlvs->hostname) { | |
1313 | sbuf_push(log, indent, | |
1314 | "WARNING: Hostname present multiple times.\n"); | |
1315 | stream_forward_getp(s, tlv_len); | |
1316 | return 0; | |
1317 | } | |
1318 | ||
841791b6 | 1319 | tlvs->hostname = XCALLOC(MTYPE_ISIS_TLV, tlv_len + 1); |
7ef5fefc CF |
1320 | stream_get(tlvs->hostname, s, tlv_len); |
1321 | tlvs->hostname[tlv_len] = '\0'; | |
1322 | ||
1323 | bool sane = true; | |
1324 | for (uint8_t i = 0; i < tlv_len; i++) { | |
1325 | if ((unsigned char)tlvs->hostname[i] > 127 | |
a7ce0ad1 | 1326 | || !isprint((int)tlvs->hostname[i])) { |
7ef5fefc CF |
1327 | sane = false; |
1328 | tlvs->hostname[i] = '?'; | |
1329 | } | |
1330 | } | |
1331 | if (!sane) { | |
1332 | sbuf_push( | |
1333 | log, indent, | |
1334 | "WARNING: Hostname contained non-printable/non-ascii characters.\n"); | |
1335 | } | |
1336 | ||
1337 | return 0; | |
1338 | } | |
1339 | ||
1340 | /* Functions related to TLVs 236/237 IPv6/MT-IPv6 reach */ | |
1341 | ||
1342 | static struct isis_item *copy_item_ipv6_reach(struct isis_item *i) | |
1343 | { | |
1344 | struct isis_ipv6_reach *r = (struct isis_ipv6_reach *)i; | |
841791b6 | 1345 | struct isis_ipv6_reach *rv = XCALLOC(MTYPE_ISIS_TLV, sizeof(*rv)); |
7ef5fefc CF |
1346 | rv->metric = r->metric; |
1347 | rv->down = r->down; | |
1348 | rv->external = r->external; | |
1349 | rv->prefix = r->prefix; | |
1350 | rv->subtlvs = copy_subtlvs(r->subtlvs); | |
1351 | ||
1352 | return (struct isis_item *)rv; | |
1353 | } | |
1354 | ||
1355 | static void format_item_ipv6_reach(uint16_t mtid, struct isis_item *i, | |
1356 | struct sbuf *buf, int indent) | |
1357 | { | |
1358 | struct isis_ipv6_reach *r = (struct isis_ipv6_reach *)i; | |
1359 | char prefixbuf[PREFIX2STR_BUFFER]; | |
1360 | ||
1361 | sbuf_push(buf, indent, "%sIPv6 Reachability: %s (Metric: %u)%s%s", | |
1362 | (mtid == ISIS_MT_IPV4_UNICAST) ? "" : "MT ", | |
1363 | prefix2str(&r->prefix, prefixbuf, sizeof(prefixbuf)), | |
996c9314 | 1364 | r->metric, r->down ? " Down" : "", |
7ef5fefc CF |
1365 | r->external ? " External" : ""); |
1366 | if (mtid != ISIS_MT_IPV4_UNICAST) | |
1367 | sbuf_push(buf, 0, " %s", isis_mtid2str(mtid)); | |
1368 | sbuf_push(buf, 0, "\n"); | |
1369 | ||
1370 | if (r->subtlvs) { | |
1371 | sbuf_push(buf, indent, " Subtlvs:\n"); | |
1372 | format_subtlvs(r->subtlvs, buf, indent + 4); | |
1373 | } | |
1374 | } | |
1375 | ||
1376 | static void free_item_ipv6_reach(struct isis_item *i) | |
1377 | { | |
1378 | struct isis_ipv6_reach *item = (struct isis_ipv6_reach *)i; | |
1379 | ||
1380 | isis_free_subtlvs(item->subtlvs); | |
841791b6 | 1381 | XFREE(MTYPE_ISIS_TLV, item); |
7ef5fefc CF |
1382 | } |
1383 | ||
1384 | static int pack_item_ipv6_reach(struct isis_item *i, struct stream *s) | |
1385 | { | |
1386 | struct isis_ipv6_reach *r = (struct isis_ipv6_reach *)i; | |
1387 | uint8_t control; | |
1388 | ||
1389 | if (STREAM_WRITEABLE(s) < 6) | |
1390 | return 1; | |
1391 | stream_putl(s, r->metric); | |
1392 | ||
1393 | control = r->down ? ISIS_IPV6_REACH_DOWN : 0; | |
1394 | control |= r->external ? ISIS_IPV6_REACH_EXTERNAL : 0; | |
1395 | control |= r->subtlvs ? ISIS_IPV6_REACH_SUBTLV : 0; | |
1396 | ||
1397 | stream_putc(s, control); | |
1398 | stream_putc(s, r->prefix.prefixlen); | |
1399 | ||
1400 | if (STREAM_WRITEABLE(s) < (unsigned)PSIZE(r->prefix.prefixlen)) | |
1401 | return 1; | |
1402 | stream_put(s, &r->prefix.prefix.s6_addr, PSIZE(r->prefix.prefixlen)); | |
1403 | ||
1404 | if (r->subtlvs) | |
1405 | return pack_subtlvs(r->subtlvs, s); | |
1406 | ||
1407 | return 0; | |
1408 | } | |
1409 | ||
1410 | static int unpack_item_ipv6_reach(uint16_t mtid, uint8_t len, struct stream *s, | |
1411 | struct sbuf *log, void *dest, int indent) | |
1412 | { | |
1413 | struct isis_tlvs *tlvs = dest; | |
1414 | struct isis_ipv6_reach *rv = NULL; | |
1415 | size_t consume; | |
1416 | uint8_t control, subtlv_len; | |
1417 | struct isis_item_list *items; | |
1418 | ||
1419 | if (mtid == ISIS_MT_IPV4_UNICAST) { | |
1420 | items = &tlvs->ipv6_reach; | |
1421 | } else { | |
1422 | items = isis_get_mt_items(&tlvs->mt_ipv6_reach, mtid); | |
1423 | } | |
1424 | ||
1425 | sbuf_push(log, indent, "Unpacking %sIPv6 reachability...\n", | |
1426 | (mtid == ISIS_MT_IPV4_UNICAST) ? "" : "mt "); | |
1427 | consume = 6; | |
1428 | if (len < consume) { | |
996c9314 LB |
1429 | sbuf_push( |
1430 | log, indent, | |
1431 | "Not enough data left. (expected 6 or more bytes, got %" PRIu8 | |
1432 | ")\n", | |
1433 | len); | |
7ef5fefc CF |
1434 | goto out; |
1435 | } | |
1436 | ||
841791b6 | 1437 | rv = XCALLOC(MTYPE_ISIS_TLV, sizeof(*rv)); |
7ef5fefc CF |
1438 | |
1439 | rv->metric = stream_getl(s); | |
1440 | control = stream_getc(s); | |
1441 | rv->down = (control & ISIS_IPV6_REACH_DOWN); | |
1442 | rv->external = (control & ISIS_IPV6_REACH_EXTERNAL); | |
1443 | ||
1444 | rv->prefix.family = AF_INET6; | |
1445 | rv->prefix.prefixlen = stream_getc(s); | |
1446 | if (rv->prefix.prefixlen > 128) { | |
1447 | sbuf_push(log, indent, "Prefixlen %u is inplausible for IPv6\n", | |
1448 | rv->prefix.prefixlen); | |
1449 | goto out; | |
1450 | } | |
1451 | ||
1452 | consume += PSIZE(rv->prefix.prefixlen); | |
1453 | if (len < consume) { | |
996c9314 LB |
1454 | sbuf_push( |
1455 | log, indent, | |
1456 | "Expected %u bytes of prefix, but only %u bytes available.\n", | |
1457 | PSIZE(rv->prefix.prefixlen), len - 6); | |
7ef5fefc CF |
1458 | goto out; |
1459 | } | |
1460 | stream_get(&rv->prefix.prefix.s6_addr, s, PSIZE(rv->prefix.prefixlen)); | |
1461 | struct in6_addr orig_prefix = rv->prefix.prefix; | |
1462 | apply_mask_ipv6(&rv->prefix); | |
1463 | if (memcmp(&orig_prefix, &rv->prefix.prefix, sizeof(orig_prefix))) | |
1464 | sbuf_push(log, indent + 2, | |
1465 | "WARNING: Prefix had hostbits set.\n"); | |
1466 | format_item_ipv6_reach(mtid, (struct isis_item *)rv, log, indent + 2); | |
1467 | ||
1468 | if (control & ISIS_IPV6_REACH_SUBTLV) { | |
1469 | consume += 1; | |
1470 | if (len < consume) { | |
996c9314 LB |
1471 | sbuf_push( |
1472 | log, indent, | |
1473 | "Expected 1 byte of subtlv len, but no more data persent.\n"); | |
7ef5fefc CF |
1474 | goto out; |
1475 | } | |
1476 | subtlv_len = stream_getc(s); | |
1477 | ||
1478 | if (!subtlv_len) { | |
996c9314 LB |
1479 | sbuf_push( |
1480 | log, indent + 2, | |
1481 | " WARNING: subtlv bit set, but there are no subtlvs.\n"); | |
7ef5fefc CF |
1482 | } |
1483 | consume += subtlv_len; | |
1484 | if (len < consume) { | |
996c9314 LB |
1485 | sbuf_push( |
1486 | log, indent, | |
1487 | "Expected %" PRIu8 | |
1488 | " bytes of subtlvs, but only %u bytes available.\n", | |
1489 | subtlv_len, | |
1490 | len - 6 - PSIZE(rv->prefix.prefixlen)); | |
7ef5fefc CF |
1491 | goto out; |
1492 | } | |
1493 | ||
1494 | rv->subtlvs = isis_alloc_subtlvs(); | |
1495 | if (unpack_tlvs(ISIS_CONTEXT_SUBTLV_IPV6_REACH, subtlv_len, s, | |
1496 | log, rv->subtlvs, indent + 4)) { | |
1497 | goto out; | |
1498 | } | |
1499 | } | |
1500 | ||
1501 | append_item(items, (struct isis_item *)rv); | |
1502 | return 0; | |
1503 | out: | |
1504 | if (rv) | |
1505 | free_item_ipv6_reach((struct isis_item *)rv); | |
1506 | return 1; | |
1507 | } | |
1508 | ||
1509 | /* Functions related to TLV 10 Authentication */ | |
1510 | static struct isis_item *copy_item_auth(struct isis_item *i) | |
1511 | { | |
1512 | struct isis_auth *auth = (struct isis_auth *)i; | |
841791b6 | 1513 | struct isis_auth *rv = XCALLOC(MTYPE_ISIS_TLV, sizeof(*rv)); |
7ef5fefc CF |
1514 | |
1515 | rv->type = auth->type; | |
1516 | rv->length = auth->length; | |
1517 | memcpy(rv->value, auth->value, sizeof(rv->value)); | |
1518 | return (struct isis_item *)rv; | |
1519 | } | |
1520 | ||
1521 | static void format_item_auth(uint16_t mtid, struct isis_item *i, | |
1522 | struct sbuf *buf, int indent) | |
1523 | { | |
1524 | struct isis_auth *auth = (struct isis_auth *)i; | |
1525 | char obuf[768]; | |
1526 | ||
1527 | sbuf_push(buf, indent, "Authentication:\n"); | |
1528 | switch (auth->type) { | |
1529 | case ISIS_PASSWD_TYPE_CLEARTXT: | |
1530 | zlog_sanitize(obuf, sizeof(obuf), auth->value, auth->length); | |
1531 | sbuf_push(buf, indent, " Password: %s\n", obuf); | |
1532 | break; | |
1533 | case ISIS_PASSWD_TYPE_HMAC_MD5: | |
1534 | for (unsigned int i = 0; i < 16; i++) { | |
1535 | snprintf(obuf + 2 * i, sizeof(obuf) - 2 * i, | |
1536 | "%02" PRIx8, auth->value[i]); | |
1537 | } | |
1538 | sbuf_push(buf, indent, " HMAC-MD5: %s\n", obuf); | |
1539 | break; | |
1540 | default: | |
1541 | sbuf_push(buf, indent, " Unknown (%" PRIu8 ")\n", auth->type); | |
1542 | break; | |
1543 | }; | |
1544 | } | |
1545 | ||
1546 | static void free_item_auth(struct isis_item *i) | |
1547 | { | |
841791b6 | 1548 | XFREE(MTYPE_ISIS_TLV, i); |
7ef5fefc CF |
1549 | } |
1550 | ||
1551 | static int pack_item_auth(struct isis_item *i, struct stream *s) | |
1552 | { | |
1553 | struct isis_auth *auth = (struct isis_auth *)i; | |
1554 | ||
1555 | if (STREAM_WRITEABLE(s) < 1) | |
1556 | return 1; | |
1557 | stream_putc(s, auth->type); | |
1558 | ||
1559 | switch (auth->type) { | |
1560 | case ISIS_PASSWD_TYPE_CLEARTXT: | |
1561 | if (STREAM_WRITEABLE(s) < auth->length) | |
1562 | return 1; | |
1563 | stream_put(s, auth->passwd, auth->length); | |
1564 | break; | |
1565 | case ISIS_PASSWD_TYPE_HMAC_MD5: | |
1566 | if (STREAM_WRITEABLE(s) < 16) | |
1567 | return 1; | |
1568 | auth->offset = stream_get_endp(s); | |
1569 | stream_put(s, NULL, 16); | |
1570 | break; | |
1571 | default: | |
1572 | return 1; | |
1573 | } | |
1574 | ||
1575 | return 0; | |
1576 | } | |
1577 | ||
1578 | static int unpack_item_auth(uint16_t mtid, uint8_t len, struct stream *s, | |
1579 | struct sbuf *log, void *dest, int indent) | |
1580 | { | |
1581 | struct isis_tlvs *tlvs = dest; | |
1582 | ||
1583 | sbuf_push(log, indent, "Unpack Auth TLV...\n"); | |
1584 | if (len < 1) { | |
1585 | sbuf_push( | |
1586 | log, indent, | |
1587 | "Not enough data left.(Expected 1 bytes of auth type, got %" PRIu8 | |
1588 | ")\n", | |
1589 | len); | |
1590 | return 1; | |
1591 | } | |
1592 | ||
841791b6 | 1593 | struct isis_auth *rv = XCALLOC(MTYPE_ISIS_TLV, sizeof(*rv)); |
7ef5fefc CF |
1594 | |
1595 | rv->type = stream_getc(s); | |
1596 | rv->length = len - 1; | |
1597 | ||
1598 | if (rv->type == ISIS_PASSWD_TYPE_HMAC_MD5 && rv->length != 16) { | |
1599 | sbuf_push( | |
1600 | log, indent, | |
1601 | "Unexpected auth length for HMAC-MD5 (expected 16, got %" PRIu8 | |
1602 | ")\n", | |
1603 | rv->length); | |
841791b6 | 1604 | XFREE(MTYPE_ISIS_TLV, rv); |
7ef5fefc CF |
1605 | return 1; |
1606 | } | |
1607 | ||
1608 | rv->offset = stream_get_getp(s); | |
1609 | stream_get(rv->value, s, rv->length); | |
1610 | format_item_auth(mtid, (struct isis_item *)rv, log, indent + 2); | |
1611 | append_item(&tlvs->isis_auth, (struct isis_item *)rv); | |
1612 | return 0; | |
1613 | } | |
1614 | ||
1615 | /* Functions relating to item TLVs */ | |
1616 | ||
1617 | static void init_item_list(struct isis_item_list *items) | |
1618 | { | |
1619 | items->head = NULL; | |
1620 | items->tail = &items->head; | |
1621 | items->count = 0; | |
1622 | } | |
1623 | ||
1624 | static struct isis_item *copy_item(enum isis_tlv_context context, | |
1625 | enum isis_tlv_type type, | |
1626 | struct isis_item *item) | |
1627 | { | |
1628 | const struct tlv_ops *ops = tlv_table[context][type]; | |
1629 | ||
1630 | if (ops && ops->copy_item) | |
1631 | return ops->copy_item(item); | |
1632 | ||
1633 | assert(!"Unknown item tlv type!"); | |
1634 | return NULL; | |
1635 | } | |
1636 | ||
1637 | static void copy_items(enum isis_tlv_context context, enum isis_tlv_type type, | |
1638 | struct isis_item_list *src, struct isis_item_list *dest) | |
1639 | { | |
1640 | struct isis_item *item; | |
1641 | ||
1642 | init_item_list(dest); | |
1643 | ||
1644 | for (item = src->head; item; item = item->next) { | |
1645 | append_item(dest, copy_item(context, type, item)); | |
1646 | } | |
1647 | } | |
1648 | ||
1649 | static void format_item(uint16_t mtid, enum isis_tlv_context context, | |
1650 | enum isis_tlv_type type, struct isis_item *i, | |
1651 | struct sbuf *buf, int indent) | |
1652 | { | |
1653 | const struct tlv_ops *ops = tlv_table[context][type]; | |
1654 | ||
1655 | if (ops && ops->format_item) { | |
1656 | ops->format_item(mtid, i, buf, indent); | |
1657 | return; | |
1658 | } | |
1659 | ||
1660 | assert(!"Unknown item tlv type!"); | |
1661 | } | |
1662 | ||
1663 | static void format_items_(uint16_t mtid, enum isis_tlv_context context, | |
1664 | enum isis_tlv_type type, struct isis_item_list *items, | |
1665 | struct sbuf *buf, int indent) | |
1666 | { | |
1667 | struct isis_item *i; | |
1668 | ||
1669 | for (i = items->head; i; i = i->next) | |
1670 | format_item(mtid, context, type, i, buf, indent); | |
1671 | } | |
1672 | #define format_items(...) format_items_(ISIS_MT_IPV4_UNICAST, __VA_ARGS__) | |
1673 | ||
1674 | static void free_item(enum isis_tlv_context tlv_context, | |
1675 | enum isis_tlv_type tlv_type, struct isis_item *item) | |
1676 | { | |
1677 | const struct tlv_ops *ops = tlv_table[tlv_context][tlv_type]; | |
1678 | ||
1679 | if (ops && ops->free_item) { | |
1680 | ops->free_item(item); | |
1681 | return; | |
1682 | } | |
1683 | ||
1684 | assert(!"Unknown item tlv type!"); | |
1685 | } | |
1686 | ||
1687 | static void free_items(enum isis_tlv_context context, enum isis_tlv_type type, | |
1688 | struct isis_item_list *items) | |
1689 | { | |
1690 | struct isis_item *item, *next_item; | |
1691 | ||
1692 | for (item = items->head; item; item = next_item) { | |
1693 | next_item = item->next; | |
1694 | free_item(context, type, item); | |
1695 | } | |
1696 | } | |
1697 | ||
1698 | static int pack_item(enum isis_tlv_context context, enum isis_tlv_type type, | |
1699 | struct isis_item *i, struct stream *s, | |
1700 | struct isis_tlvs **fragment_tlvs, | |
1701 | struct pack_order_entry *pe, uint16_t mtid) | |
1702 | { | |
1703 | const struct tlv_ops *ops = tlv_table[context][type]; | |
1704 | ||
1705 | if (ops && ops->pack_item) { | |
1706 | return ops->pack_item(i, s); | |
1707 | } | |
1708 | ||
1709 | assert(!"Unknown item tlv type!"); | |
1710 | return 1; | |
1711 | } | |
1712 | ||
996c9314 LB |
1713 | static void add_item_to_fragment(struct isis_item *i, |
1714 | struct pack_order_entry *pe, | |
7ef5fefc CF |
1715 | struct isis_tlvs *fragment_tlvs, uint16_t mtid) |
1716 | { | |
1717 | struct isis_item_list *l; | |
1718 | ||
1719 | if (pe->how_to_pack == ISIS_ITEMS) { | |
996c9314 LB |
1720 | l = (struct isis_item_list *)(((char *)fragment_tlvs) |
1721 | + pe->what_to_pack); | |
7ef5fefc CF |
1722 | } else { |
1723 | struct isis_mt_item_list *m; | |
996c9314 LB |
1724 | m = (struct isis_mt_item_list *)(((char *)fragment_tlvs) |
1725 | + pe->what_to_pack); | |
7ef5fefc CF |
1726 | l = isis_get_mt_items(m, mtid); |
1727 | } | |
1728 | ||
1729 | append_item(l, copy_item(pe->context, pe->type, i)); | |
1730 | } | |
1731 | ||
1732 | static int pack_items_(uint16_t mtid, enum isis_tlv_context context, | |
1733 | enum isis_tlv_type type, struct isis_item_list *items, | |
1734 | struct stream *s, struct isis_tlvs **fragment_tlvs, | |
1735 | struct pack_order_entry *pe, | |
1736 | struct isis_tlvs *(*new_fragment)(struct list *l), | |
1737 | struct list *new_fragment_arg) | |
1738 | { | |
1739 | size_t len_pos, last_len, len; | |
1740 | struct isis_item *item = NULL; | |
1741 | int rv; | |
1742 | ||
1743 | if (!items->head) | |
1744 | return 0; | |
1745 | ||
1746 | top: | |
1747 | if (STREAM_WRITEABLE(s) < 2) | |
1748 | goto too_long; | |
1749 | ||
1750 | stream_putc(s, type); | |
1751 | len_pos = stream_get_endp(s); | |
1752 | stream_putc(s, 0); /* Put 0 as length for now */ | |
1753 | ||
1754 | if (context == ISIS_CONTEXT_LSP && IS_COMPAT_MT_TLV(type) | |
1755 | && mtid != ISIS_MT_IPV4_UNICAST) { | |
1756 | if (STREAM_WRITEABLE(s) < 2) | |
1757 | goto too_long; | |
1758 | stream_putw(s, mtid); | |
1759 | } | |
1760 | ||
1761 | if (context == ISIS_CONTEXT_LSP && type == ISIS_TLV_OLDSTYLE_REACH) { | |
1762 | if (STREAM_WRITEABLE(s) < 1) | |
1763 | goto too_long; | |
1764 | stream_putc(s, 0); /* Virtual flag is set to 0 */ | |
1765 | } | |
1766 | ||
1767 | last_len = len = 0; | |
1768 | for (item = item ? item : items->head; item; item = item->next) { | |
1769 | rv = pack_item(context, type, item, s, fragment_tlvs, pe, mtid); | |
1770 | if (rv) | |
1771 | goto too_long; | |
1772 | ||
1773 | len = stream_get_endp(s) - len_pos - 1; | |
1774 | ||
1775 | /* Multiple auths don't go into one TLV, so always break */ | |
1776 | if (context == ISIS_CONTEXT_LSP && type == ISIS_TLV_AUTH) { | |
1777 | item = item->next; | |
1778 | break; | |
1779 | } | |
1780 | ||
1781 | if (len > 255) { | |
1782 | if (!last_len) /* strange, not a single item fit */ | |
1783 | return 1; | |
1784 | /* drop last tlv, otherwise, its too long */ | |
1785 | stream_set_endp(s, len_pos + 1 + last_len); | |
1786 | len = last_len; | |
1787 | break; | |
1788 | } | |
1789 | ||
1790 | if (fragment_tlvs) | |
1791 | add_item_to_fragment(item, pe, *fragment_tlvs, mtid); | |
1792 | ||
1793 | last_len = len; | |
1794 | } | |
1795 | ||
1796 | stream_putc_at(s, len_pos, len); | |
1797 | if (item) | |
1798 | goto top; | |
1799 | ||
1800 | return 0; | |
1801 | too_long: | |
1802 | if (!fragment_tlvs) | |
1803 | return 1; | |
1804 | stream_reset(s); | |
1805 | *fragment_tlvs = new_fragment(new_fragment_arg); | |
1806 | goto top; | |
1807 | } | |
1808 | #define pack_items(...) pack_items_(ISIS_MT_IPV4_UNICAST, __VA_ARGS__) | |
1809 | ||
1810 | static void append_item(struct isis_item_list *dest, struct isis_item *item) | |
1811 | { | |
1812 | *dest->tail = item; | |
1813 | dest->tail = &(*dest->tail)->next; | |
1814 | dest->count++; | |
1815 | } | |
1816 | ||
1817 | static int unpack_item(uint16_t mtid, enum isis_tlv_context context, | |
1818 | uint8_t tlv_type, uint8_t len, struct stream *s, | |
1819 | struct sbuf *log, void *dest, int indent) | |
1820 | { | |
1821 | const struct tlv_ops *ops = tlv_table[context][tlv_type]; | |
1822 | ||
1823 | if (ops && ops->unpack_item) | |
1824 | return ops->unpack_item(mtid, len, s, log, dest, indent); | |
1825 | ||
1826 | assert(!"Unknown item tlv type!"); | |
1827 | sbuf_push(log, indent, "Unknown item tlv type!\n"); | |
1828 | return 1; | |
1829 | } | |
1830 | ||
1831 | static int unpack_tlv_with_items(enum isis_tlv_context context, | |
1832 | uint8_t tlv_type, uint8_t tlv_len, | |
1833 | struct stream *s, struct sbuf *log, void *dest, | |
1834 | int indent) | |
1835 | { | |
1836 | size_t tlv_start; | |
1837 | size_t tlv_pos; | |
1838 | int rv; | |
1839 | uint16_t mtid; | |
1840 | ||
1841 | tlv_start = stream_get_getp(s); | |
1842 | tlv_pos = 0; | |
1843 | ||
1844 | if (context == ISIS_CONTEXT_LSP && IS_COMPAT_MT_TLV(tlv_type)) { | |
1845 | if (tlv_len < 2) { | |
1846 | sbuf_push(log, indent, | |
1847 | "TLV is too short to contain MTID\n"); | |
1848 | return 1; | |
1849 | } | |
1850 | mtid = stream_getw(s) & ISIS_MT_MASK; | |
1851 | tlv_pos += 2; | |
1852 | sbuf_push(log, indent, "Unpacking as MT %s item TLV...\n", | |
1853 | isis_mtid2str(mtid)); | |
1854 | } else { | |
1855 | sbuf_push(log, indent, "Unpacking as item TLV...\n"); | |
1856 | mtid = ISIS_MT_IPV4_UNICAST; | |
1857 | } | |
1858 | ||
1859 | if (context == ISIS_CONTEXT_LSP | |
1860 | && tlv_type == ISIS_TLV_OLDSTYLE_REACH) { | |
1861 | if (tlv_len - tlv_pos < 1) { | |
1862 | sbuf_push(log, indent, | |
1863 | "TLV is too short for old style reach\n"); | |
1864 | return 1; | |
1865 | } | |
1866 | stream_forward_getp(s, 1); | |
1867 | tlv_pos += 1; | |
1868 | } | |
1869 | ||
1870 | if (context == ISIS_CONTEXT_LSP | |
1871 | && tlv_type == ISIS_TLV_OLDSTYLE_IP_REACH) { | |
1872 | struct isis_tlvs *tlvs = dest; | |
1873 | dest = &tlvs->oldstyle_ip_reach; | |
1874 | } else if (context == ISIS_CONTEXT_LSP | |
1875 | && tlv_type == ISIS_TLV_OLDSTYLE_IP_REACH_EXT) { | |
1876 | struct isis_tlvs *tlvs = dest; | |
1877 | dest = &tlvs->oldstyle_ip_reach_ext; | |
1878 | } | |
1879 | ||
1880 | if (context == ISIS_CONTEXT_LSP | |
1881 | && tlv_type == ISIS_TLV_MT_ROUTER_INFO) { | |
1882 | struct isis_tlvs *tlvs = dest; | |
1883 | tlvs->mt_router_info_empty = (tlv_pos >= (size_t)tlv_len); | |
1884 | } | |
1885 | ||
1886 | while (tlv_pos < (size_t)tlv_len) { | |
1887 | rv = unpack_item(mtid, context, tlv_type, tlv_len - tlv_pos, s, | |
1888 | log, dest, indent + 2); | |
1889 | if (rv) | |
1890 | return rv; | |
1891 | ||
1892 | tlv_pos = stream_get_getp(s) - tlv_start; | |
1893 | } | |
1894 | ||
1895 | return 0; | |
1896 | } | |
1897 | ||
1898 | /* Functions to manipulate mt_item_lists */ | |
1899 | ||
1900 | static int isis_mt_item_list_cmp(const struct isis_item_list *a, | |
1901 | const struct isis_item_list *b) | |
1902 | { | |
1903 | if (a->mtid < b->mtid) | |
1904 | return -1; | |
1905 | if (a->mtid > b->mtid) | |
1906 | return 1; | |
1907 | return 0; | |
1908 | } | |
1909 | ||
1910 | RB_PROTOTYPE(isis_mt_item_list, isis_item_list, mt_tree, isis_mt_item_list_cmp); | |
1911 | RB_GENERATE(isis_mt_item_list, isis_item_list, mt_tree, isis_mt_item_list_cmp); | |
1912 | ||
1913 | struct isis_item_list *isis_get_mt_items(struct isis_mt_item_list *m, | |
1914 | uint16_t mtid) | |
1915 | { | |
1916 | struct isis_item_list *rv; | |
1917 | ||
1918 | rv = isis_lookup_mt_items(m, mtid); | |
1919 | if (!rv) { | |
1920 | rv = XCALLOC(MTYPE_ISIS_MT_ITEM_LIST, sizeof(*rv)); | |
1921 | init_item_list(rv); | |
1922 | rv->mtid = mtid; | |
1923 | RB_INSERT(isis_mt_item_list, m, rv); | |
1924 | } | |
1925 | ||
1926 | return rv; | |
1927 | } | |
1928 | ||
1929 | struct isis_item_list *isis_lookup_mt_items(struct isis_mt_item_list *m, | |
1930 | uint16_t mtid) | |
1931 | { | |
1932 | struct isis_item_list key = {.mtid = mtid}; | |
1933 | ||
1934 | return RB_FIND(isis_mt_item_list, m, &key); | |
1935 | } | |
1936 | ||
1937 | static void free_mt_items(enum isis_tlv_context context, | |
1938 | enum isis_tlv_type type, struct isis_mt_item_list *m) | |
1939 | { | |
1940 | struct isis_item_list *n, *nnext; | |
1941 | ||
a2addae8 | 1942 | RB_FOREACH_SAFE (n, isis_mt_item_list, m, nnext) { |
7ef5fefc CF |
1943 | free_items(context, type, n); |
1944 | RB_REMOVE(isis_mt_item_list, m, n); | |
1945 | XFREE(MTYPE_ISIS_MT_ITEM_LIST, n); | |
1946 | } | |
1947 | } | |
1948 | ||
1949 | static void format_mt_items(enum isis_tlv_context context, | |
1950 | enum isis_tlv_type type, | |
1951 | struct isis_mt_item_list *m, struct sbuf *buf, | |
1952 | int indent) | |
1953 | { | |
1954 | struct isis_item_list *n; | |
1955 | ||
a2addae8 | 1956 | RB_FOREACH (n, isis_mt_item_list, m) { |
7ef5fefc CF |
1957 | format_items_(n->mtid, context, type, n, buf, indent); |
1958 | } | |
1959 | } | |
1960 | ||
1961 | static int pack_mt_items(enum isis_tlv_context context, enum isis_tlv_type type, | |
1962 | struct isis_mt_item_list *m, struct stream *s, | |
1963 | struct isis_tlvs **fragment_tlvs, | |
1964 | struct pack_order_entry *pe, | |
1965 | struct isis_tlvs *(*new_fragment)(struct list *l), | |
1966 | struct list *new_fragment_arg) | |
1967 | { | |
1968 | struct isis_item_list *n; | |
1969 | ||
a2addae8 | 1970 | RB_FOREACH (n, isis_mt_item_list, m) { |
7ef5fefc CF |
1971 | int rv; |
1972 | ||
1973 | rv = pack_items_(n->mtid, context, type, n, s, fragment_tlvs, | |
1974 | pe, new_fragment, new_fragment_arg); | |
1975 | if (rv) | |
1976 | return rv; | |
1977 | } | |
1978 | ||
1979 | return 0; | |
1980 | } | |
1981 | ||
1982 | static void copy_mt_items(enum isis_tlv_context context, | |
1983 | enum isis_tlv_type type, | |
1984 | struct isis_mt_item_list *src, | |
1985 | struct isis_mt_item_list *dest) | |
1986 | { | |
1987 | struct isis_item_list *n; | |
1988 | ||
1989 | RB_INIT(isis_mt_item_list, dest); | |
1990 | ||
a2addae8 | 1991 | RB_FOREACH (n, isis_mt_item_list, src) { |
7ef5fefc CF |
1992 | copy_items(context, type, n, isis_get_mt_items(dest, n->mtid)); |
1993 | } | |
1994 | } | |
1995 | ||
1996 | /* Functions related to tlvs in general */ | |
1997 | ||
1998 | struct isis_tlvs *isis_alloc_tlvs(void) | |
1999 | { | |
2000 | struct isis_tlvs *result; | |
2001 | ||
841791b6 | 2002 | result = XCALLOC(MTYPE_ISIS_TLV, sizeof(*result)); |
7ef5fefc CF |
2003 | |
2004 | init_item_list(&result->isis_auth); | |
2005 | init_item_list(&result->area_addresses); | |
2006 | init_item_list(&result->mt_router_info); | |
2007 | init_item_list(&result->oldstyle_reach); | |
2008 | init_item_list(&result->lan_neighbor); | |
2009 | init_item_list(&result->lsp_entries); | |
2010 | init_item_list(&result->extended_reach); | |
2011 | RB_INIT(isis_mt_item_list, &result->mt_reach); | |
2012 | init_item_list(&result->oldstyle_ip_reach); | |
2013 | init_item_list(&result->oldstyle_ip_reach_ext); | |
2014 | init_item_list(&result->ipv4_address); | |
2015 | init_item_list(&result->ipv6_address); | |
2016 | init_item_list(&result->extended_ip_reach); | |
2017 | RB_INIT(isis_mt_item_list, &result->mt_ip_reach); | |
2018 | init_item_list(&result->ipv6_reach); | |
2019 | RB_INIT(isis_mt_item_list, &result->mt_ipv6_reach); | |
2020 | ||
2021 | return result; | |
2022 | } | |
2023 | ||
2024 | struct isis_tlvs *isis_copy_tlvs(struct isis_tlvs *tlvs) | |
2025 | { | |
841791b6 | 2026 | struct isis_tlvs *rv = XCALLOC(MTYPE_ISIS_TLV, sizeof(*rv)); |
7ef5fefc CF |
2027 | |
2028 | copy_items(ISIS_CONTEXT_LSP, ISIS_TLV_AUTH, &tlvs->isis_auth, | |
2029 | &rv->isis_auth); | |
2030 | ||
2031 | copy_items(ISIS_CONTEXT_LSP, ISIS_TLV_AREA_ADDRESSES, | |
2032 | &tlvs->area_addresses, &rv->area_addresses); | |
2033 | ||
2034 | copy_items(ISIS_CONTEXT_LSP, ISIS_TLV_MT_ROUTER_INFO, | |
2035 | &tlvs->mt_router_info, &rv->mt_router_info); | |
2036 | ||
2037 | tlvs->mt_router_info_empty = rv->mt_router_info_empty; | |
2038 | ||
2039 | copy_items(ISIS_CONTEXT_LSP, ISIS_TLV_OLDSTYLE_REACH, | |
2040 | &tlvs->oldstyle_reach, &rv->oldstyle_reach); | |
2041 | ||
2042 | copy_items(ISIS_CONTEXT_LSP, ISIS_TLV_LAN_NEIGHBORS, | |
2043 | &tlvs->lan_neighbor, &rv->lan_neighbor); | |
2044 | ||
2045 | copy_items(ISIS_CONTEXT_LSP, ISIS_TLV_LSP_ENTRY, &tlvs->lsp_entries, | |
2046 | &rv->lsp_entries); | |
2047 | ||
2048 | copy_items(ISIS_CONTEXT_LSP, ISIS_TLV_EXTENDED_REACH, | |
2049 | &tlvs->extended_reach, &rv->extended_reach); | |
2050 | ||
2051 | copy_mt_items(ISIS_CONTEXT_LSP, ISIS_TLV_MT_REACH, &tlvs->mt_reach, | |
2052 | &rv->mt_reach); | |
2053 | ||
2054 | copy_items(ISIS_CONTEXT_LSP, ISIS_TLV_OLDSTYLE_IP_REACH, | |
2055 | &tlvs->oldstyle_ip_reach, &rv->oldstyle_ip_reach); | |
2056 | ||
2057 | copy_tlv_protocols_supported(&tlvs->protocols_supported, | |
2058 | &rv->protocols_supported); | |
2059 | ||
2060 | copy_items(ISIS_CONTEXT_LSP, ISIS_TLV_OLDSTYLE_IP_REACH_EXT, | |
2061 | &tlvs->oldstyle_ip_reach_ext, &rv->oldstyle_ip_reach_ext); | |
2062 | ||
2063 | copy_items(ISIS_CONTEXT_LSP, ISIS_TLV_IPV4_ADDRESS, &tlvs->ipv4_address, | |
2064 | &rv->ipv4_address); | |
2065 | ||
2066 | copy_items(ISIS_CONTEXT_LSP, ISIS_TLV_IPV6_ADDRESS, &tlvs->ipv6_address, | |
2067 | &rv->ipv6_address); | |
2068 | ||
2069 | rv->te_router_id = copy_tlv_te_router_id(tlvs->te_router_id); | |
2070 | ||
2071 | copy_items(ISIS_CONTEXT_LSP, ISIS_TLV_EXTENDED_IP_REACH, | |
2072 | &tlvs->extended_ip_reach, &rv->extended_ip_reach); | |
2073 | ||
2074 | copy_mt_items(ISIS_CONTEXT_LSP, ISIS_TLV_MT_IP_REACH, | |
2075 | &tlvs->mt_ip_reach, &rv->mt_ip_reach); | |
2076 | ||
2077 | rv->hostname = copy_tlv_dynamic_hostname(tlvs->hostname); | |
2078 | ||
2079 | copy_items(ISIS_CONTEXT_LSP, ISIS_TLV_IPV6_REACH, &tlvs->ipv6_reach, | |
2080 | &rv->ipv6_reach); | |
2081 | ||
2082 | copy_mt_items(ISIS_CONTEXT_LSP, ISIS_TLV_MT_IPV6_REACH, | |
2083 | &tlvs->mt_ipv6_reach, &rv->mt_ipv6_reach); | |
2084 | ||
2085 | return rv; | |
2086 | } | |
2087 | ||
2088 | static void format_tlvs(struct isis_tlvs *tlvs, struct sbuf *buf, int indent) | |
2089 | { | |
2090 | format_tlv_protocols_supported(&tlvs->protocols_supported, buf, indent); | |
2091 | ||
2092 | format_items(ISIS_CONTEXT_LSP, ISIS_TLV_AUTH, &tlvs->isis_auth, buf, | |
2093 | indent); | |
2094 | ||
2095 | format_items(ISIS_CONTEXT_LSP, ISIS_TLV_AREA_ADDRESSES, | |
2096 | &tlvs->area_addresses, buf, indent); | |
2097 | ||
2098 | if (tlvs->mt_router_info_empty) { | |
2099 | sbuf_push(buf, indent, "MT Router Info: None\n"); | |
2100 | } else { | |
2101 | format_items(ISIS_CONTEXT_LSP, ISIS_TLV_MT_ROUTER_INFO, | |
2102 | &tlvs->mt_router_info, buf, indent); | |
2103 | } | |
2104 | ||
2105 | format_items(ISIS_CONTEXT_LSP, ISIS_TLV_OLDSTYLE_REACH, | |
2106 | &tlvs->oldstyle_reach, buf, indent); | |
2107 | ||
2108 | format_items(ISIS_CONTEXT_LSP, ISIS_TLV_LAN_NEIGHBORS, | |
2109 | &tlvs->lan_neighbor, buf, indent); | |
2110 | ||
2111 | format_items(ISIS_CONTEXT_LSP, ISIS_TLV_LSP_ENTRY, &tlvs->lsp_entries, | |
2112 | buf, indent); | |
2113 | ||
2114 | format_tlv_dynamic_hostname(tlvs->hostname, buf, indent); | |
2115 | format_tlv_te_router_id(tlvs->te_router_id, buf, indent); | |
2116 | ||
2117 | format_items(ISIS_CONTEXT_LSP, ISIS_TLV_EXTENDED_REACH, | |
2118 | &tlvs->extended_reach, buf, indent); | |
2119 | ||
2120 | format_mt_items(ISIS_CONTEXT_LSP, ISIS_TLV_MT_REACH, &tlvs->mt_reach, | |
2121 | buf, indent); | |
2122 | ||
2123 | format_items(ISIS_CONTEXT_LSP, ISIS_TLV_OLDSTYLE_IP_REACH, | |
2124 | &tlvs->oldstyle_ip_reach, buf, indent); | |
2125 | ||
2126 | format_items(ISIS_CONTEXT_LSP, ISIS_TLV_OLDSTYLE_IP_REACH_EXT, | |
2127 | &tlvs->oldstyle_ip_reach_ext, buf, indent); | |
2128 | ||
2129 | format_items(ISIS_CONTEXT_LSP, ISIS_TLV_IPV4_ADDRESS, | |
2130 | &tlvs->ipv4_address, buf, indent); | |
2131 | ||
2132 | format_items(ISIS_CONTEXT_LSP, ISIS_TLV_IPV6_ADDRESS, | |
2133 | &tlvs->ipv6_address, buf, indent); | |
2134 | ||
2135 | format_items(ISIS_CONTEXT_LSP, ISIS_TLV_EXTENDED_IP_REACH, | |
2136 | &tlvs->extended_ip_reach, buf, indent); | |
2137 | ||
2138 | format_mt_items(ISIS_CONTEXT_LSP, ISIS_TLV_MT_IP_REACH, | |
2139 | &tlvs->mt_ip_reach, buf, indent); | |
2140 | ||
2141 | format_items(ISIS_CONTEXT_LSP, ISIS_TLV_IPV6_REACH, &tlvs->ipv6_reach, | |
2142 | buf, indent); | |
2143 | ||
2144 | format_mt_items(ISIS_CONTEXT_LSP, ISIS_TLV_MT_IPV6_REACH, | |
2145 | &tlvs->mt_ipv6_reach, buf, indent); | |
2146 | } | |
2147 | ||
2148 | const char *isis_format_tlvs(struct isis_tlvs *tlvs) | |
2149 | { | |
2150 | static struct sbuf buf; | |
2151 | ||
2152 | if (!sbuf_buf(&buf)) | |
2153 | sbuf_init(&buf, NULL, 0); | |
2154 | ||
2155 | sbuf_reset(&buf); | |
2156 | format_tlvs(tlvs, &buf, 0); | |
2157 | return sbuf_buf(&buf); | |
2158 | } | |
2159 | ||
2160 | void isis_free_tlvs(struct isis_tlvs *tlvs) | |
2161 | { | |
2162 | if (!tlvs) | |
2163 | return; | |
2164 | ||
2165 | free_items(ISIS_CONTEXT_LSP, ISIS_TLV_AUTH, &tlvs->isis_auth); | |
2166 | free_items(ISIS_CONTEXT_LSP, ISIS_TLV_AREA_ADDRESSES, | |
2167 | &tlvs->area_addresses); | |
2168 | free_items(ISIS_CONTEXT_LSP, ISIS_TLV_MT_ROUTER_INFO, | |
2169 | &tlvs->mt_router_info); | |
2170 | free_items(ISIS_CONTEXT_LSP, ISIS_TLV_OLDSTYLE_REACH, | |
2171 | &tlvs->oldstyle_reach); | |
2172 | free_items(ISIS_CONTEXT_LSP, ISIS_TLV_LAN_NEIGHBORS, | |
2173 | &tlvs->lan_neighbor); | |
2174 | free_items(ISIS_CONTEXT_LSP, ISIS_TLV_LSP_ENTRY, &tlvs->lsp_entries); | |
2175 | free_items(ISIS_CONTEXT_LSP, ISIS_TLV_EXTENDED_REACH, | |
2176 | &tlvs->extended_reach); | |
2177 | free_mt_items(ISIS_CONTEXT_LSP, ISIS_TLV_MT_REACH, &tlvs->mt_reach); | |
2178 | free_items(ISIS_CONTEXT_LSP, ISIS_TLV_OLDSTYLE_IP_REACH, | |
2179 | &tlvs->oldstyle_ip_reach); | |
2180 | free_tlv_protocols_supported(&tlvs->protocols_supported); | |
2181 | free_items(ISIS_CONTEXT_LSP, ISIS_TLV_OLDSTYLE_IP_REACH_EXT, | |
2182 | &tlvs->oldstyle_ip_reach_ext); | |
2183 | free_items(ISIS_CONTEXT_LSP, ISIS_TLV_IPV4_ADDRESS, | |
2184 | &tlvs->ipv4_address); | |
2185 | free_items(ISIS_CONTEXT_LSP, ISIS_TLV_IPV6_ADDRESS, | |
2186 | &tlvs->ipv6_address); | |
2187 | free_tlv_te_router_id(tlvs->te_router_id); | |
2188 | free_items(ISIS_CONTEXT_LSP, ISIS_TLV_EXTENDED_IP_REACH, | |
2189 | &tlvs->extended_ip_reach); | |
2190 | free_mt_items(ISIS_CONTEXT_LSP, ISIS_TLV_MT_IP_REACH, | |
2191 | &tlvs->mt_ip_reach); | |
2192 | free_tlv_dynamic_hostname(tlvs->hostname); | |
2193 | free_items(ISIS_CONTEXT_LSP, ISIS_TLV_IPV6_REACH, &tlvs->ipv6_reach); | |
2194 | free_mt_items(ISIS_CONTEXT_LSP, ISIS_TLV_MT_IPV6_REACH, | |
2195 | &tlvs->mt_ipv6_reach); | |
2196 | ||
841791b6 | 2197 | XFREE(MTYPE_ISIS_TLV, tlvs); |
7ef5fefc CF |
2198 | } |
2199 | ||
2200 | static void add_padding(struct stream *s) | |
2201 | { | |
2202 | while (STREAM_WRITEABLE(s)) { | |
2203 | if (STREAM_WRITEABLE(s) == 1) | |
2204 | break; | |
2205 | uint32_t padding_len = STREAM_WRITEABLE(s) - 2; | |
2206 | ||
2207 | if (padding_len > 255) { | |
2208 | if (padding_len == 256) | |
2209 | padding_len = 254; | |
2210 | else | |
2211 | padding_len = 255; | |
2212 | } | |
2213 | ||
2214 | stream_putc(s, ISIS_TLV_PADDING); | |
2215 | stream_putc(s, padding_len); | |
2216 | stream_put(s, NULL, padding_len); | |
2217 | } | |
2218 | } | |
2219 | ||
2220 | #define LSP_REM_LIFETIME_OFF 10 | |
2221 | #define LSP_CHECKSUM_OFF 24 | |
2222 | static void safe_auth_md5(struct stream *s, uint16_t *checksum, | |
2223 | uint16_t *rem_lifetime) | |
2224 | { | |
2225 | memcpy(rem_lifetime, STREAM_DATA(s) + LSP_REM_LIFETIME_OFF, | |
2226 | sizeof(*rem_lifetime)); | |
2227 | memset(STREAM_DATA(s) + LSP_REM_LIFETIME_OFF, 0, sizeof(*rem_lifetime)); | |
2228 | memcpy(checksum, STREAM_DATA(s) + LSP_CHECKSUM_OFF, sizeof(*checksum)); | |
2229 | memset(STREAM_DATA(s) + LSP_CHECKSUM_OFF, 0, sizeof(*checksum)); | |
2230 | } | |
2231 | ||
2232 | static void restore_auth_md5(struct stream *s, uint16_t checksum, | |
2233 | uint16_t rem_lifetime) | |
2234 | { | |
2235 | memcpy(STREAM_DATA(s) + LSP_REM_LIFETIME_OFF, &rem_lifetime, | |
2236 | sizeof(rem_lifetime)); | |
2237 | memcpy(STREAM_DATA(s) + LSP_CHECKSUM_OFF, &checksum, sizeof(checksum)); | |
2238 | } | |
2239 | ||
2240 | static void update_auth_hmac_md5(struct isis_auth *auth, struct stream *s, | |
2241 | bool is_lsp) | |
2242 | { | |
2243 | uint8_t digest[16]; | |
2244 | uint16_t checksum, rem_lifetime; | |
2245 | ||
2246 | if (is_lsp) | |
2247 | safe_auth_md5(s, &checksum, &rem_lifetime); | |
2248 | ||
2249 | memset(STREAM_DATA(s) + auth->offset, 0, 16); | |
2250 | hmac_md5(STREAM_DATA(s), stream_get_endp(s), auth->passwd, | |
2251 | auth->plength, digest); | |
2252 | memcpy(auth->value, digest, 16); | |
2253 | memcpy(STREAM_DATA(s) + auth->offset, digest, 16); | |
2254 | ||
2255 | if (is_lsp) | |
2256 | restore_auth_md5(s, checksum, rem_lifetime); | |
2257 | } | |
2258 | ||
2259 | static void update_auth(struct isis_tlvs *tlvs, struct stream *s, bool is_lsp) | |
2260 | { | |
2261 | struct isis_auth *auth_head = (struct isis_auth *)tlvs->isis_auth.head; | |
2262 | ||
2263 | for (struct isis_auth *auth = auth_head; auth; auth = auth->next) { | |
2264 | if (auth->type == ISIS_PASSWD_TYPE_HMAC_MD5) | |
2265 | update_auth_hmac_md5(auth, s, is_lsp); | |
2266 | } | |
2267 | } | |
2268 | ||
2269 | static int handle_pack_entry(struct pack_order_entry *pe, | |
2270 | struct isis_tlvs *tlvs, struct stream *stream, | |
2271 | struct isis_tlvs **fragment_tlvs, | |
2272 | struct isis_tlvs *(*new_fragment)(struct list *l), | |
2273 | struct list *new_fragment_arg) | |
2274 | { | |
2275 | int rv; | |
2276 | ||
2277 | if (pe->how_to_pack == ISIS_ITEMS) { | |
2278 | struct isis_item_list *l; | |
2279 | l = (struct isis_item_list *)(((char *)tlvs) | |
2280 | + pe->what_to_pack); | |
2281 | rv = pack_items(pe->context, pe->type, l, stream, fragment_tlvs, | |
2282 | pe, new_fragment, new_fragment_arg); | |
2283 | } else { | |
2284 | struct isis_mt_item_list *l; | |
2285 | l = (struct isis_mt_item_list *)(((char *)tlvs) | |
2286 | + pe->what_to_pack); | |
2287 | rv = pack_mt_items(pe->context, pe->type, l, stream, | |
2288 | fragment_tlvs, pe, new_fragment, | |
2289 | new_fragment_arg); | |
2290 | } | |
2291 | ||
2292 | return rv; | |
2293 | } | |
2294 | ||
2295 | static int pack_tlvs(struct isis_tlvs *tlvs, struct stream *stream, | |
2296 | struct isis_tlvs *fragment_tlvs, | |
2297 | struct isis_tlvs *(*new_fragment)(struct list *l), | |
2298 | struct list *new_fragment_arg) | |
2299 | { | |
2300 | int rv; | |
2301 | ||
2302 | /* When fragmenting, don't add auth as it's already accounted for in the | |
2303 | * size we are given. */ | |
2304 | if (!fragment_tlvs) { | |
996c9314 LB |
2305 | rv = pack_items(ISIS_CONTEXT_LSP, ISIS_TLV_AUTH, |
2306 | &tlvs->isis_auth, stream, NULL, NULL, NULL, | |
2307 | NULL); | |
7ef5fefc CF |
2308 | if (rv) |
2309 | return rv; | |
2310 | } | |
2311 | ||
2312 | rv = pack_tlv_protocols_supported(&tlvs->protocols_supported, stream); | |
2313 | if (rv) | |
2314 | return rv; | |
2315 | if (fragment_tlvs) { | |
2316 | copy_tlv_protocols_supported( | |
2317 | &tlvs->protocols_supported, | |
2318 | &fragment_tlvs->protocols_supported); | |
2319 | } | |
2320 | ||
2321 | rv = pack_items(ISIS_CONTEXT_LSP, ISIS_TLV_AREA_ADDRESSES, | |
2322 | &tlvs->area_addresses, stream, NULL, NULL, NULL, NULL); | |
2323 | if (rv) | |
2324 | return rv; | |
2325 | if (fragment_tlvs) { | |
2326 | copy_items(ISIS_CONTEXT_LSP, ISIS_TLV_AREA_ADDRESSES, | |
2327 | &tlvs->area_addresses, | |
2328 | &fragment_tlvs->area_addresses); | |
2329 | } | |
2330 | ||
2331 | ||
2332 | if (tlvs->mt_router_info_empty) { | |
2333 | if (STREAM_WRITEABLE(stream) < 2) | |
2334 | return 1; | |
2335 | stream_putc(stream, ISIS_TLV_MT_ROUTER_INFO); | |
2336 | stream_putc(stream, 0); | |
2337 | if (fragment_tlvs) | |
2338 | fragment_tlvs->mt_router_info_empty = true; | |
2339 | } else { | |
2340 | rv = pack_items(ISIS_CONTEXT_LSP, ISIS_TLV_MT_ROUTER_INFO, | |
2341 | &tlvs->mt_router_info, stream, NULL, NULL, NULL, | |
2342 | NULL); | |
2343 | if (rv) | |
2344 | return rv; | |
2345 | if (fragment_tlvs) { | |
2346 | copy_items(ISIS_CONTEXT_LSP, ISIS_TLV_MT_ROUTER_INFO, | |
2347 | &tlvs->mt_router_info, | |
2348 | &fragment_tlvs->mt_router_info); | |
2349 | } | |
2350 | } | |
2351 | ||
2352 | rv = pack_tlv_dynamic_hostname(tlvs->hostname, stream); | |
2353 | if (rv) | |
2354 | return rv; | |
2355 | if (fragment_tlvs) | |
2356 | fragment_tlvs->hostname = | |
2357 | copy_tlv_dynamic_hostname(tlvs->hostname); | |
2358 | ||
2359 | rv = pack_tlv_te_router_id(tlvs->te_router_id, stream); | |
2360 | if (rv) | |
2361 | return rv; | |
2362 | if (fragment_tlvs) { | |
2363 | fragment_tlvs->te_router_id = | |
2364 | copy_tlv_te_router_id(tlvs->te_router_id); | |
2365 | } | |
2366 | ||
2367 | for (size_t pack_idx = 0; pack_idx < array_size(pack_order); | |
2368 | pack_idx++) { | |
2369 | rv = handle_pack_entry(&pack_order[pack_idx], tlvs, stream, | |
2370 | fragment_tlvs ? &fragment_tlvs : NULL, | |
2371 | new_fragment, new_fragment_arg); | |
2372 | ||
2373 | if (rv) | |
2374 | return rv; | |
2375 | } | |
2376 | ||
2377 | return 0; | |
2378 | } | |
2379 | ||
2380 | int isis_pack_tlvs(struct isis_tlvs *tlvs, struct stream *stream, | |
2381 | size_t len_pointer, bool pad, bool is_lsp) | |
2382 | { | |
2383 | int rv; | |
2384 | ||
2385 | rv = pack_tlvs(tlvs, stream, NULL, NULL, NULL); | |
2386 | if (rv) | |
2387 | return rv; | |
2388 | ||
2389 | if (pad) | |
2390 | add_padding(stream); | |
2391 | ||
2392 | if (len_pointer != (size_t)-1) { | |
2393 | stream_putw_at(stream, len_pointer, stream_get_endp(stream)); | |
2394 | } | |
2395 | ||
2396 | update_auth(tlvs, stream, is_lsp); | |
2397 | ||
2398 | return 0; | |
2399 | } | |
2400 | ||
2401 | static struct isis_tlvs *new_fragment(struct list *l) | |
2402 | { | |
2403 | struct isis_tlvs *rv = isis_alloc_tlvs(); | |
2404 | ||
2405 | listnode_add(l, rv); | |
2406 | return rv; | |
2407 | } | |
2408 | ||
2409 | struct list *isis_fragment_tlvs(struct isis_tlvs *tlvs, size_t size) | |
2410 | { | |
2411 | struct stream *dummy_stream = stream_new(size); | |
2412 | struct list *rv = list_new(); | |
2413 | struct isis_tlvs *fragment_tlvs = new_fragment(rv); | |
2414 | ||
2415 | if (pack_tlvs(tlvs, dummy_stream, fragment_tlvs, new_fragment, rv)) { | |
2416 | struct listnode *node; | |
2417 | for (ALL_LIST_ELEMENTS_RO(rv, node, fragment_tlvs)) | |
2418 | isis_free_tlvs(fragment_tlvs); | |
affe9e99 | 2419 | list_delete_and_null(&rv); |
7ef5fefc CF |
2420 | } |
2421 | ||
2422 | stream_free(dummy_stream); | |
2423 | return rv; | |
2424 | } | |
2425 | ||
2426 | static int unpack_tlv_unknown(enum isis_tlv_context context, uint8_t tlv_type, | |
2427 | uint8_t tlv_len, struct stream *s, | |
2428 | struct sbuf *log, int indent) | |
2429 | { | |
2430 | stream_forward_getp(s, tlv_len); | |
2431 | sbuf_push(log, indent, | |
2432 | "Skipping unknown TLV %" PRIu8 " (%" PRIu8 " bytes)\n", | |
2433 | tlv_type, tlv_len); | |
2434 | return 0; | |
2435 | } | |
2436 | ||
2437 | static int unpack_tlv(enum isis_tlv_context context, size_t avail_len, | |
2438 | struct stream *stream, struct sbuf *log, void *dest, | |
2439 | int indent) | |
2440 | { | |
2441 | uint8_t tlv_type, tlv_len; | |
2442 | const struct tlv_ops *ops; | |
2443 | ||
2444 | sbuf_push(log, indent, "Unpacking TLV...\n"); | |
2445 | ||
2446 | if (avail_len < 2) { | |
2447 | sbuf_push( | |
2448 | log, indent + 2, | |
2449 | "Available data %zu too short to contain a TLV header.\n", | |
2450 | avail_len); | |
2451 | return 1; | |
2452 | } | |
2453 | ||
2454 | tlv_type = stream_getc(stream); | |
2455 | tlv_len = stream_getc(stream); | |
2456 | ||
2457 | sbuf_push(log, indent + 2, | |
2458 | "Found TLV of type %" PRIu8 " and len %" PRIu8 ".\n", | |
2459 | tlv_type, tlv_len); | |
2460 | ||
2461 | if (avail_len < ((size_t)tlv_len) + 2) { | |
996c9314 LB |
2462 | sbuf_push( |
2463 | log, indent + 2, | |
2464 | "Available data %zu too short for claimed TLV len %" PRIu8 | |
2465 | ".\n", | |
2466 | avail_len - 2, tlv_len); | |
7ef5fefc CF |
2467 | return 1; |
2468 | } | |
2469 | ||
2470 | ops = tlv_table[context][tlv_type]; | |
2471 | if (ops && ops->unpack) { | |
2472 | return ops->unpack(context, tlv_type, tlv_len, stream, log, | |
2473 | dest, indent + 2); | |
2474 | } | |
2475 | ||
2476 | return unpack_tlv_unknown(context, tlv_type, tlv_len, stream, log, | |
2477 | indent + 2); | |
2478 | } | |
2479 | ||
2480 | static int unpack_tlvs(enum isis_tlv_context context, size_t avail_len, | |
2481 | struct stream *stream, struct sbuf *log, void *dest, | |
2482 | int indent) | |
2483 | { | |
2484 | int rv; | |
2485 | size_t tlv_start, tlv_pos; | |
2486 | ||
2487 | tlv_start = stream_get_getp(stream); | |
2488 | tlv_pos = 0; | |
2489 | ||
2490 | sbuf_push(log, indent, "Unpacking %zu bytes of %s...\n", avail_len, | |
2491 | (context == ISIS_CONTEXT_LSP) ? "TLVs" : "sub-TLVs"); | |
2492 | ||
2493 | while (tlv_pos < avail_len) { | |
2494 | rv = unpack_tlv(context, avail_len - tlv_pos, stream, log, dest, | |
2495 | indent + 2); | |
2496 | if (rv) | |
2497 | return rv; | |
2498 | ||
2499 | tlv_pos = stream_get_getp(stream) - tlv_start; | |
2500 | } | |
2501 | ||
2502 | return 0; | |
2503 | } | |
2504 | ||
2505 | int isis_unpack_tlvs(size_t avail_len, struct stream *stream, | |
2506 | struct isis_tlvs **dest, const char **log) | |
2507 | { | |
2508 | static struct sbuf logbuf; | |
2509 | int indent = 0; | |
2510 | int rv; | |
2511 | struct isis_tlvs *result; | |
2512 | ||
2513 | if (!sbuf_buf(&logbuf)) | |
2514 | sbuf_init(&logbuf, NULL, 0); | |
2515 | ||
2516 | sbuf_reset(&logbuf); | |
2517 | if (avail_len > STREAM_READABLE(stream)) { | |
2518 | sbuf_push(&logbuf, indent, | |
2519 | "Stream doesn't contain sufficient data. " | |
2520 | "Claimed %zu, available %zu\n", | |
2521 | avail_len, STREAM_READABLE(stream)); | |
2522 | return 1; | |
2523 | } | |
2524 | ||
2525 | result = isis_alloc_tlvs(); | |
2526 | rv = unpack_tlvs(ISIS_CONTEXT_LSP, avail_len, stream, &logbuf, result, | |
2527 | indent); | |
2528 | ||
2529 | *log = sbuf_buf(&logbuf); | |
2530 | *dest = result; | |
2531 | ||
2532 | return rv; | |
2533 | } | |
2534 | ||
2535 | #define TLV_OPS(_name_, _desc_) \ | |
2536 | static const struct tlv_ops tlv_##_name_##_ops = { \ | |
2537 | .name = _desc_, .unpack = unpack_tlv_##_name_, \ | |
2538 | } | |
2539 | ||
2540 | #define ITEM_TLV_OPS(_name_, _desc_) \ | |
2541 | static const struct tlv_ops tlv_##_name_##_ops = { \ | |
2542 | .name = _desc_, \ | |
2543 | .unpack = unpack_tlv_with_items, \ | |
996c9314 | 2544 | \ |
7ef5fefc CF |
2545 | .pack_item = pack_item_##_name_, \ |
2546 | .free_item = free_item_##_name_, \ | |
2547 | .unpack_item = unpack_item_##_name_, \ | |
2548 | .format_item = format_item_##_name_, \ | |
2549 | .copy_item = copy_item_##_name_} | |
2550 | ||
2551 | #define SUBTLV_OPS(_name_, _desc_) \ | |
2552 | static const struct tlv_ops subtlv_##_name_##_ops = { \ | |
2553 | .name = _desc_, .unpack = unpack_subtlv_##_name_, \ | |
2554 | } | |
2555 | ||
2556 | ITEM_TLV_OPS(area_address, "TLV 1 Area Addresses"); | |
2557 | ITEM_TLV_OPS(oldstyle_reach, "TLV 2 IS Reachability"); | |
2558 | ITEM_TLV_OPS(lan_neighbor, "TLV 6 LAN Neighbors"); | |
2559 | ITEM_TLV_OPS(lsp_entry, "TLV 9 LSP Entries"); | |
2560 | ITEM_TLV_OPS(auth, "TLV 10 IS-IS Auth"); | |
2561 | ITEM_TLV_OPS(extended_reach, "TLV 22 Extended Reachability"); | |
2562 | ITEM_TLV_OPS(oldstyle_ip_reach, "TLV 128/130 IP Reachability"); | |
2563 | TLV_OPS(protocols_supported, "TLV 129 Protocols Supported"); | |
2564 | ITEM_TLV_OPS(ipv4_address, "TLV 132 IPv4 Interface Address"); | |
2565 | TLV_OPS(te_router_id, "TLV 134 TE Router ID"); | |
2566 | ITEM_TLV_OPS(extended_ip_reach, "TLV 135 Extended IP Reachability"); | |
2567 | TLV_OPS(dynamic_hostname, "TLV 137 Dynamic Hostname"); | |
2568 | ITEM_TLV_OPS(mt_router_info, "TLV 229 MT Router Information"); | |
2569 | ITEM_TLV_OPS(ipv6_address, "TLV 232 IPv6 Interface Address"); | |
2570 | ITEM_TLV_OPS(ipv6_reach, "TLV 236 IPv6 Reachability"); | |
2571 | ||
2572 | SUBTLV_OPS(ipv6_source_prefix, "Sub-TLV 22 IPv6 Source Prefix"); | |
2573 | ||
996c9314 LB |
2574 | static const struct tlv_ops *tlv_table[ISIS_CONTEXT_MAX][ISIS_TLV_MAX] = |
2575 | {[ISIS_CONTEXT_LSP] = | |
2576 | { | |
2577 | [ISIS_TLV_AREA_ADDRESSES] = | |
2578 | &tlv_area_address_ops, | |
2579 | [ISIS_TLV_OLDSTYLE_REACH] = | |
2580 | &tlv_oldstyle_reach_ops, | |
2581 | [ISIS_TLV_LAN_NEIGHBORS] = | |
2582 | &tlv_lan_neighbor_ops, | |
2583 | [ISIS_TLV_LSP_ENTRY] = &tlv_lsp_entry_ops, | |
2584 | [ISIS_TLV_AUTH] = &tlv_auth_ops, | |
2585 | [ISIS_TLV_EXTENDED_REACH] = | |
2586 | &tlv_extended_reach_ops, | |
2587 | [ISIS_TLV_MT_REACH] = &tlv_extended_reach_ops, | |
2588 | [ISIS_TLV_OLDSTYLE_IP_REACH] = | |
2589 | &tlv_oldstyle_ip_reach_ops, | |
2590 | [ISIS_TLV_PROTOCOLS_SUPPORTED] = | |
2591 | &tlv_protocols_supported_ops, | |
2592 | [ISIS_TLV_OLDSTYLE_IP_REACH_EXT] = | |
2593 | &tlv_oldstyle_ip_reach_ops, | |
2594 | [ISIS_TLV_IPV4_ADDRESS] = | |
2595 | &tlv_ipv4_address_ops, | |
2596 | [ISIS_TLV_TE_ROUTER_ID] = | |
2597 | &tlv_te_router_id_ops, | |
2598 | [ISIS_TLV_EXTENDED_IP_REACH] = | |
2599 | &tlv_extended_ip_reach_ops, | |
2600 | [ISIS_TLV_MT_IP_REACH] = | |
2601 | &tlv_extended_ip_reach_ops, | |
2602 | [ISIS_TLV_DYNAMIC_HOSTNAME] = | |
2603 | &tlv_dynamic_hostname_ops, | |
2604 | [ISIS_TLV_MT_ROUTER_INFO] = | |
2605 | &tlv_mt_router_info_ops, | |
2606 | [ISIS_TLV_IPV6_ADDRESS] = | |
2607 | &tlv_ipv6_address_ops, | |
2608 | [ISIS_TLV_IPV6_REACH] = &tlv_ipv6_reach_ops, | |
2609 | [ISIS_TLV_MT_IPV6_REACH] = &tlv_ipv6_reach_ops, | |
2610 | }, | |
2611 | [ISIS_CONTEXT_SUBTLV_NE_REACH] = {}, | |
2612 | [ISIS_CONTEXT_SUBTLV_IP_REACH] = {}, | |
2613 | [ISIS_CONTEXT_SUBTLV_IPV6_REACH] = { | |
2614 | [ISIS_SUBTLV_IPV6_SOURCE_PREFIX] = | |
2615 | &subtlv_ipv6_source_prefix_ops, | |
2616 | }}; | |
7ef5fefc CF |
2617 | |
2618 | /* Accessor functions */ | |
2619 | ||
2620 | void isis_tlvs_add_auth(struct isis_tlvs *tlvs, struct isis_passwd *passwd) | |
2621 | { | |
2622 | free_items(ISIS_CONTEXT_LSP, ISIS_TLV_AUTH, &tlvs->isis_auth); | |
2623 | init_item_list(&tlvs->isis_auth); | |
2624 | ||
2625 | if (passwd->type == ISIS_PASSWD_TYPE_UNUSED) | |
2626 | return; | |
2627 | ||
841791b6 | 2628 | struct isis_auth *auth = XCALLOC(MTYPE_ISIS_TLV, sizeof(*auth)); |
7ef5fefc CF |
2629 | |
2630 | auth->type = passwd->type; | |
2631 | ||
2632 | auth->plength = passwd->len; | |
2633 | memcpy(auth->passwd, passwd->passwd, | |
2634 | MIN(sizeof(auth->passwd), sizeof(passwd->passwd))); | |
2635 | ||
2636 | if (auth->type == ISIS_PASSWD_TYPE_CLEARTXT) { | |
2637 | auth->length = passwd->len; | |
2638 | memcpy(auth->value, passwd->passwd, | |
2639 | MIN(sizeof(auth->value), sizeof(passwd->passwd))); | |
2640 | } | |
2641 | ||
2642 | append_item(&tlvs->isis_auth, (struct isis_item *)auth); | |
2643 | } | |
2644 | ||
2645 | void isis_tlvs_add_area_addresses(struct isis_tlvs *tlvs, | |
2646 | struct list *addresses) | |
2647 | { | |
2648 | struct listnode *node; | |
2649 | struct area_addr *area_addr; | |
2650 | ||
2651 | for (ALL_LIST_ELEMENTS_RO(addresses, node, area_addr)) { | |
2652 | struct isis_area_address *a = | |
841791b6 | 2653 | XCALLOC(MTYPE_ISIS_TLV, sizeof(*a)); |
7ef5fefc CF |
2654 | |
2655 | a->len = area_addr->addr_len; | |
2656 | memcpy(a->addr, area_addr->area_addr, 20); | |
2657 | append_item(&tlvs->area_addresses, (struct isis_item *)a); | |
2658 | } | |
2659 | } | |
2660 | ||
2661 | void isis_tlvs_add_lan_neighbors(struct isis_tlvs *tlvs, struct list *neighbors) | |
2662 | { | |
2663 | struct listnode *node; | |
2664 | u_char *snpa; | |
2665 | ||
2666 | for (ALL_LIST_ELEMENTS_RO(neighbors, node, snpa)) { | |
2667 | struct isis_lan_neighbor *n = | |
841791b6 | 2668 | XCALLOC(MTYPE_ISIS_TLV, sizeof(*n)); |
7ef5fefc CF |
2669 | |
2670 | memcpy(n->mac, snpa, 6); | |
2671 | append_item(&tlvs->lan_neighbor, (struct isis_item *)n); | |
2672 | } | |
2673 | } | |
2674 | ||
2675 | void isis_tlvs_set_protocols_supported(struct isis_tlvs *tlvs, | |
2676 | struct nlpids *nlpids) | |
2677 | { | |
2678 | tlvs->protocols_supported.count = nlpids->count; | |
2679 | if (tlvs->protocols_supported.protocols) | |
841791b6 | 2680 | XFREE(MTYPE_ISIS_TLV, tlvs->protocols_supported.protocols); |
7ef5fefc CF |
2681 | if (nlpids->count) { |
2682 | tlvs->protocols_supported.protocols = | |
841791b6 | 2683 | XCALLOC(MTYPE_ISIS_TLV, nlpids->count); |
7ef5fefc CF |
2684 | memcpy(tlvs->protocols_supported.protocols, nlpids->nlpids, |
2685 | nlpids->count); | |
2686 | } else { | |
2687 | tlvs->protocols_supported.protocols = NULL; | |
2688 | } | |
2689 | } | |
2690 | ||
2691 | void isis_tlvs_add_mt_router_info(struct isis_tlvs *tlvs, uint16_t mtid, | |
2692 | bool overload, bool attached) | |
2693 | { | |
841791b6 | 2694 | struct isis_mt_router_info *i = XCALLOC(MTYPE_ISIS_TLV, sizeof(*i)); |
7ef5fefc CF |
2695 | |
2696 | i->overload = overload; | |
2697 | i->attached = attached; | |
2698 | i->mtid = mtid; | |
2699 | append_item(&tlvs->mt_router_info, (struct isis_item *)i); | |
2700 | } | |
2701 | ||
2702 | void isis_tlvs_add_ipv4_address(struct isis_tlvs *tlvs, struct in_addr *addr) | |
2703 | { | |
841791b6 | 2704 | struct isis_ipv4_address *a = XCALLOC(MTYPE_ISIS_TLV, sizeof(*a)); |
7ef5fefc CF |
2705 | a->addr = *addr; |
2706 | append_item(&tlvs->ipv4_address, (struct isis_item *)a); | |
2707 | } | |
2708 | ||
2709 | ||
2710 | void isis_tlvs_add_ipv4_addresses(struct isis_tlvs *tlvs, | |
2711 | struct list *addresses) | |
2712 | { | |
2713 | struct listnode *node; | |
2714 | struct prefix_ipv4 *ip_addr; | |
bb5c77d7 | 2715 | unsigned int addr_count = 0; |
7ef5fefc | 2716 | |
bb5c77d7 | 2717 | for (ALL_LIST_ELEMENTS_RO(addresses, node, ip_addr)) { |
7ef5fefc | 2718 | isis_tlvs_add_ipv4_address(tlvs, &ip_addr->prefix); |
bb5c77d7 CF |
2719 | addr_count++; |
2720 | if (addr_count >= 63) | |
2721 | break; | |
2722 | } | |
7ef5fefc CF |
2723 | } |
2724 | ||
2725 | void isis_tlvs_add_ipv6_addresses(struct isis_tlvs *tlvs, | |
2726 | struct list *addresses) | |
2727 | { | |
2728 | struct listnode *node; | |
2729 | struct prefix_ipv6 *ip_addr; | |
2730 | ||
2731 | for (ALL_LIST_ELEMENTS_RO(addresses, node, ip_addr)) { | |
2732 | struct isis_ipv6_address *a = | |
841791b6 | 2733 | XCALLOC(MTYPE_ISIS_TLV, sizeof(*a)); |
7ef5fefc CF |
2734 | |
2735 | a->addr = ip_addr->prefix; | |
2736 | append_item(&tlvs->ipv6_address, (struct isis_item *)a); | |
2737 | } | |
2738 | } | |
2739 | ||
2740 | typedef bool (*auth_validator_func)(struct isis_passwd *passwd, | |
2741 | struct stream *stream, | |
2742 | struct isis_auth *auth, bool is_lsp); | |
2743 | ||
2744 | static bool auth_validator_cleartxt(struct isis_passwd *passwd, | |
2745 | struct stream *stream, | |
2746 | struct isis_auth *auth, bool is_lsp) | |
2747 | { | |
2748 | return (auth->length == passwd->len | |
2749 | && !memcmp(auth->value, passwd->passwd, passwd->len)); | |
2750 | } | |
2751 | ||
2752 | static bool auth_validator_hmac_md5(struct isis_passwd *passwd, | |
2753 | struct stream *stream, | |
2754 | struct isis_auth *auth, bool is_lsp) | |
2755 | { | |
2756 | uint8_t digest[16]; | |
2757 | uint16_t checksum; | |
2758 | uint16_t rem_lifetime; | |
2759 | ||
2760 | if (is_lsp) | |
2761 | safe_auth_md5(stream, &checksum, &rem_lifetime); | |
2762 | ||
2763 | memset(STREAM_DATA(stream) + auth->offset, 0, 16); | |
2764 | hmac_md5(STREAM_DATA(stream), stream_get_endp(stream), passwd->passwd, | |
2765 | passwd->len, digest); | |
2766 | memcpy(STREAM_DATA(stream) + auth->offset, auth->value, 16); | |
2767 | ||
2768 | bool rv = !memcmp(digest, auth->value, 16); | |
2769 | ||
2770 | if (is_lsp) | |
2771 | restore_auth_md5(stream, checksum, rem_lifetime); | |
2772 | ||
2773 | return rv; | |
2774 | } | |
2775 | ||
2776 | static const auth_validator_func auth_validators[] = { | |
2777 | [ISIS_PASSWD_TYPE_CLEARTXT] = auth_validator_cleartxt, | |
2778 | [ISIS_PASSWD_TYPE_HMAC_MD5] = auth_validator_hmac_md5, | |
2779 | }; | |
2780 | ||
2781 | bool isis_tlvs_auth_is_valid(struct isis_tlvs *tlvs, struct isis_passwd *passwd, | |
2782 | struct stream *stream, bool is_lsp) | |
2783 | { | |
2784 | /* If no auth is set, always pass authentication */ | |
2785 | if (!passwd->type) | |
2786 | return true; | |
2787 | ||
2788 | /* If we don't known how to validate the auth, return invalid */ | |
2789 | if (passwd->type >= array_size(auth_validators) | |
2790 | || !auth_validators[passwd->type]) | |
2791 | return false; | |
2792 | ||
2793 | struct isis_auth *auth_head = (struct isis_auth *)tlvs->isis_auth.head; | |
2794 | struct isis_auth *auth; | |
2795 | for (auth = auth_head; auth; auth = auth->next) { | |
2796 | if (auth->type == passwd->type) | |
2797 | break; | |
2798 | } | |
2799 | ||
2800 | /* If matching auth TLV could not be found, return invalid */ | |
2801 | if (!auth) | |
2802 | return false; | |
2803 | ||
2804 | /* Perform validation and return result */ | |
2805 | return auth_validators[passwd->type](passwd, stream, auth, is_lsp); | |
2806 | } | |
2807 | ||
2808 | bool isis_tlvs_area_addresses_match(struct isis_tlvs *tlvs, | |
2809 | struct list *addresses) | |
2810 | { | |
2811 | struct isis_area_address *addr_head; | |
2812 | ||
2813 | addr_head = (struct isis_area_address *)tlvs->area_addresses.head; | |
2814 | for (struct isis_area_address *addr = addr_head; addr; | |
2815 | addr = addr->next) { | |
2816 | struct listnode *node; | |
2817 | struct area_addr *a; | |
2818 | ||
2819 | for (ALL_LIST_ELEMENTS_RO(addresses, node, a)) { | |
2820 | if (a->addr_len == addr->len | |
2821 | && !memcmp(a->area_addr, addr->addr, addr->len)) | |
2822 | return true; | |
2823 | } | |
2824 | } | |
2825 | ||
2826 | return false; | |
2827 | } | |
2828 | ||
2829 | static void tlvs_area_addresses_to_adj(struct isis_tlvs *tlvs, | |
2830 | struct isis_adjacency *adj, | |
2831 | bool *changed) | |
2832 | { | |
2833 | if (adj->area_address_count != tlvs->area_addresses.count) { | |
2834 | *changed = true; | |
2835 | adj->area_address_count = tlvs->area_addresses.count; | |
2836 | adj->area_addresses = XREALLOC( | |
2837 | MTYPE_ISIS_ADJACENCY_INFO, adj->area_addresses, | |
2838 | adj->area_address_count * sizeof(*adj->area_addresses)); | |
2839 | } | |
2840 | ||
2841 | struct isis_area_address *addr = NULL; | |
2842 | for (unsigned int i = 0; i < tlvs->area_addresses.count; i++) { | |
2843 | if (!addr) | |
2844 | addr = (struct isis_area_address *) | |
2845 | tlvs->area_addresses.head; | |
2846 | else | |
2847 | addr = addr->next; | |
2848 | ||
2849 | if (adj->area_addresses[i].addr_len == addr->len | |
2850 | && !memcmp(adj->area_addresses[i].area_addr, addr->addr, | |
2851 | addr->len)) { | |
2852 | continue; | |
2853 | } | |
2854 | ||
2855 | *changed = true; | |
2856 | adj->area_addresses[i].addr_len = addr->len; | |
2857 | memcpy(adj->area_addresses[i].area_addr, addr->addr, addr->len); | |
2858 | } | |
2859 | } | |
2860 | ||
2861 | static void tlvs_protocols_supported_to_adj(struct isis_tlvs *tlvs, | |
2862 | struct isis_adjacency *adj, | |
2863 | bool *changed) | |
2864 | { | |
2865 | bool ipv4_supported = false, ipv6_supported = false; | |
2866 | ||
2867 | for (uint8_t i = 0; i < tlvs->protocols_supported.count; i++) { | |
2868 | if (tlvs->protocols_supported.protocols[i] == NLPID_IP) | |
2869 | ipv4_supported = true; | |
2870 | if (tlvs->protocols_supported.protocols[i] == NLPID_IPV6) | |
2871 | ipv6_supported = true; | |
2872 | } | |
2873 | ||
2874 | struct nlpids reduced = {}; | |
2875 | ||
2876 | if (ipv4_supported && ipv6_supported) { | |
2877 | reduced.count = 2; | |
2878 | reduced.nlpids[0] = NLPID_IP; | |
2879 | reduced.nlpids[1] = NLPID_IPV6; | |
2880 | } else if (ipv4_supported) { | |
2881 | reduced.count = 1; | |
2882 | reduced.nlpids[0] = NLPID_IP; | |
2883 | } else if (ipv6_supported) { | |
2884 | reduced.count = 1; | |
2885 | reduced.nlpids[1] = NLPID_IPV6; | |
2886 | } else { | |
2887 | reduced.count = 0; | |
2888 | } | |
2889 | ||
2890 | if (adj->nlpids.count == reduced.count | |
2891 | && !memcmp(adj->nlpids.nlpids, reduced.nlpids, reduced.count)) | |
2892 | return; | |
2893 | ||
2894 | *changed = true; | |
2895 | adj->nlpids.count = reduced.count; | |
2896 | memcpy(adj->nlpids.nlpids, reduced.nlpids, reduced.count); | |
2897 | } | |
2898 | ||
2899 | static void tlvs_ipv4_addresses_to_adj(struct isis_tlvs *tlvs, | |
2900 | struct isis_adjacency *adj, | |
2901 | bool *changed) | |
2902 | { | |
2903 | if (adj->ipv4_address_count != tlvs->ipv4_address.count) { | |
2904 | *changed = true; | |
2905 | adj->ipv4_address_count = tlvs->ipv4_address.count; | |
2906 | adj->ipv4_addresses = XREALLOC( | |
2907 | MTYPE_ISIS_ADJACENCY_INFO, adj->ipv4_addresses, | |
2908 | adj->ipv4_address_count * sizeof(*adj->ipv4_addresses)); | |
2909 | } | |
2910 | ||
2911 | struct isis_ipv4_address *addr = NULL; | |
2912 | for (unsigned int i = 0; i < tlvs->ipv4_address.count; i++) { | |
2913 | if (!addr) | |
2914 | addr = (struct isis_ipv4_address *) | |
2915 | tlvs->ipv4_address.head; | |
2916 | else | |
2917 | addr = addr->next; | |
2918 | ||
2919 | if (!memcmp(&adj->ipv4_addresses[i], &addr->addr, | |
2920 | sizeof(addr->addr))) | |
2921 | continue; | |
2922 | ||
2923 | *changed = true; | |
2924 | adj->ipv4_addresses[i] = addr->addr; | |
2925 | } | |
2926 | } | |
2927 | ||
2928 | static void tlvs_ipv6_addresses_to_adj(struct isis_tlvs *tlvs, | |
2929 | struct isis_adjacency *adj, | |
2930 | bool *changed) | |
2931 | { | |
2932 | if (adj->ipv6_address_count != tlvs->ipv6_address.count) { | |
2933 | *changed = true; | |
2934 | adj->ipv6_address_count = tlvs->ipv6_address.count; | |
2935 | adj->ipv6_addresses = XREALLOC( | |
2936 | MTYPE_ISIS_ADJACENCY_INFO, adj->ipv6_addresses, | |
2937 | adj->ipv6_address_count * sizeof(*adj->ipv6_addresses)); | |
2938 | } | |
2939 | ||
2940 | struct isis_ipv6_address *addr = NULL; | |
2941 | for (unsigned int i = 0; i < tlvs->ipv6_address.count; i++) { | |
2942 | if (!addr) | |
2943 | addr = (struct isis_ipv6_address *) | |
2944 | tlvs->ipv6_address.head; | |
2945 | else | |
2946 | addr = addr->next; | |
2947 | ||
2948 | if (!memcmp(&adj->ipv6_addresses[i], &addr->addr, | |
2949 | sizeof(addr->addr))) | |
2950 | continue; | |
2951 | ||
2952 | *changed = true; | |
2953 | adj->ipv6_addresses[i] = addr->addr; | |
2954 | } | |
2955 | } | |
2956 | ||
2957 | void isis_tlvs_to_adj(struct isis_tlvs *tlvs, struct isis_adjacency *adj, | |
2958 | bool *changed) | |
2959 | { | |
2960 | *changed = false; | |
2961 | ||
2962 | tlvs_area_addresses_to_adj(tlvs, adj, changed); | |
2963 | tlvs_protocols_supported_to_adj(tlvs, adj, changed); | |
2964 | tlvs_ipv4_addresses_to_adj(tlvs, adj, changed); | |
2965 | tlvs_ipv6_addresses_to_adj(tlvs, adj, changed); | |
2966 | } | |
2967 | ||
2968 | bool isis_tlvs_own_snpa_found(struct isis_tlvs *tlvs, uint8_t *snpa) | |
2969 | { | |
2970 | struct isis_lan_neighbor *ne_head; | |
2971 | ||
2972 | ne_head = (struct isis_lan_neighbor *)tlvs->lan_neighbor.head; | |
2973 | for (struct isis_lan_neighbor *ne = ne_head; ne; ne = ne->next) { | |
2974 | if (!memcmp(ne->mac, snpa, ETH_ALEN)) | |
2975 | return true; | |
2976 | } | |
2977 | ||
2978 | return false; | |
2979 | } | |
2980 | ||
2981 | void isis_tlvs_add_lsp_entry(struct isis_tlvs *tlvs, struct isis_lsp *lsp) | |
2982 | { | |
841791b6 | 2983 | struct isis_lsp_entry *entry = XCALLOC(MTYPE_ISIS_TLV, sizeof(*entry)); |
7ef5fefc CF |
2984 | |
2985 | entry->rem_lifetime = lsp->hdr.rem_lifetime; | |
2986 | memcpy(entry->id, lsp->hdr.lsp_id, ISIS_SYS_ID_LEN + 2); | |
2987 | entry->checksum = lsp->hdr.checksum; | |
2988 | entry->seqno = lsp->hdr.seqno; | |
2989 | entry->lsp = lsp; | |
2990 | ||
2991 | append_item(&tlvs->lsp_entries, (struct isis_item *)entry); | |
2992 | } | |
2993 | ||
2994 | void isis_tlvs_add_csnp_entries(struct isis_tlvs *tlvs, uint8_t *start_id, | |
2995 | uint8_t *stop_id, uint16_t num_lsps, | |
2996 | dict_t *lspdb, struct isis_lsp **last_lsp) | |
2997 | { | |
2998 | dnode_t *first = dict_lower_bound(lspdb, start_id); | |
2999 | if (!first) | |
3000 | return; | |
3001 | ||
3002 | dnode_t *last = dict_upper_bound(lspdb, stop_id); | |
3003 | dnode_t *curr = first; | |
3004 | ||
3005 | isis_tlvs_add_lsp_entry(tlvs, first->dict_data); | |
3006 | *last_lsp = first->dict_data; | |
3007 | ||
3008 | while (curr) { | |
3009 | curr = dict_next(lspdb, curr); | |
3010 | if (curr) { | |
3011 | isis_tlvs_add_lsp_entry(tlvs, curr->dict_data); | |
3012 | *last_lsp = curr->dict_data; | |
3013 | } | |
3014 | if (curr == last || tlvs->lsp_entries.count == num_lsps) | |
3015 | break; | |
3016 | } | |
3017 | } | |
3018 | ||
3019 | void isis_tlvs_set_dynamic_hostname(struct isis_tlvs *tlvs, | |
3020 | const char *hostname) | |
3021 | { | |
841791b6 | 3022 | XFREE(MTYPE_ISIS_TLV, tlvs->hostname); |
7ef5fefc | 3023 | if (hostname) |
841791b6 | 3024 | tlvs->hostname = XSTRDUP(MTYPE_ISIS_TLV, hostname); |
7ef5fefc CF |
3025 | } |
3026 | ||
3027 | void isis_tlvs_set_te_router_id(struct isis_tlvs *tlvs, | |
3028 | const struct in_addr *id) | |
3029 | { | |
841791b6 | 3030 | XFREE(MTYPE_ISIS_TLV, tlvs->te_router_id); |
7ef5fefc CF |
3031 | if (!id) |
3032 | return; | |
841791b6 | 3033 | tlvs->te_router_id = XCALLOC(MTYPE_ISIS_TLV, sizeof(*id)); |
7ef5fefc CF |
3034 | memcpy(tlvs->te_router_id, id, sizeof(*id)); |
3035 | } | |
3036 | ||
3037 | void isis_tlvs_add_oldstyle_ip_reach(struct isis_tlvs *tlvs, | |
3038 | struct prefix_ipv4 *dest, uint8_t metric) | |
3039 | { | |
841791b6 | 3040 | struct isis_oldstyle_ip_reach *r = XCALLOC(MTYPE_ISIS_TLV, sizeof(*r)); |
7ef5fefc CF |
3041 | |
3042 | r->metric = metric; | |
3043 | memcpy(&r->prefix, dest, sizeof(*dest)); | |
3044 | apply_mask_ipv4(&r->prefix); | |
3045 | append_item(&tlvs->oldstyle_ip_reach, (struct isis_item *)r); | |
3046 | } | |
3047 | ||
3048 | void isis_tlvs_add_extended_ip_reach(struct isis_tlvs *tlvs, | |
3049 | struct prefix_ipv4 *dest, uint32_t metric) | |
3050 | { | |
841791b6 | 3051 | struct isis_extended_ip_reach *r = XCALLOC(MTYPE_ISIS_TLV, sizeof(*r)); |
7ef5fefc CF |
3052 | |
3053 | r->metric = metric; | |
3054 | memcpy(&r->prefix, dest, sizeof(*dest)); | |
3055 | apply_mask_ipv4(&r->prefix); | |
3056 | append_item(&tlvs->extended_ip_reach, (struct isis_item *)r); | |
3057 | } | |
3058 | ||
3059 | void isis_tlvs_add_ipv6_reach(struct isis_tlvs *tlvs, uint16_t mtid, | |
3060 | struct prefix_ipv6 *dest, uint32_t metric) | |
3061 | { | |
841791b6 | 3062 | struct isis_ipv6_reach *r = XCALLOC(MTYPE_ISIS_TLV, sizeof(*r)); |
7ef5fefc CF |
3063 | |
3064 | r->metric = metric; | |
3065 | memcpy(&r->prefix, dest, sizeof(*dest)); | |
3066 | apply_mask_ipv6(&r->prefix); | |
3067 | ||
3068 | struct isis_item_list *l; | |
3069 | l = (mtid == ISIS_MT_IPV4_UNICAST) | |
3070 | ? &tlvs->ipv6_reach | |
3071 | : isis_get_mt_items(&tlvs->mt_ipv6_reach, mtid); | |
3072 | append_item(l, (struct isis_item *)r); | |
3073 | } | |
3074 | ||
3075 | void isis_tlvs_add_oldstyle_reach(struct isis_tlvs *tlvs, uint8_t *id, | |
3076 | uint8_t metric) | |
3077 | { | |
841791b6 | 3078 | struct isis_oldstyle_reach *r = XCALLOC(MTYPE_ISIS_TLV, sizeof(*r)); |
7ef5fefc CF |
3079 | |
3080 | r->metric = metric; | |
3081 | memcpy(r->id, id, sizeof(r->id)); | |
3082 | append_item(&tlvs->oldstyle_reach, (struct isis_item *)r); | |
3083 | } | |
3084 | ||
3085 | void isis_tlvs_add_extended_reach(struct isis_tlvs *tlvs, uint16_t mtid, | |
3086 | uint8_t *id, uint32_t metric, | |
3087 | uint8_t *subtlvs, uint8_t subtlv_len) | |
3088 | { | |
841791b6 | 3089 | struct isis_extended_reach *r = XCALLOC(MTYPE_ISIS_TLV, sizeof(*r)); |
7ef5fefc CF |
3090 | |
3091 | memcpy(r->id, id, sizeof(r->id)); | |
3092 | r->metric = metric; | |
3093 | if (subtlvs && subtlv_len) { | |
841791b6 | 3094 | r->subtlvs = XCALLOC(MTYPE_ISIS_TLV, subtlv_len); |
7ef5fefc CF |
3095 | memcpy(r->subtlvs, subtlvs, subtlv_len); |
3096 | r->subtlv_len = subtlv_len; | |
3097 | } | |
3098 | ||
3099 | struct isis_item_list *l; | |
3100 | if (mtid == ISIS_MT_IPV4_UNICAST) | |
3101 | l = &tlvs->extended_reach; | |
3102 | else | |
3103 | l = isis_get_mt_items(&tlvs->mt_reach, mtid); | |
3104 | append_item(l, (struct isis_item *)r); | |
3105 | } | |
3106 | ||
3107 | struct isis_mt_router_info * | |
3108 | isis_tlvs_lookup_mt_router_info(struct isis_tlvs *tlvs, uint16_t mtid) | |
3109 | { | |
3110 | if (tlvs->mt_router_info_empty) | |
3111 | return NULL; | |
3112 | ||
3113 | struct isis_mt_router_info *rv; | |
3114 | for (rv = (struct isis_mt_router_info *)tlvs->mt_router_info.head; rv; | |
3115 | rv = rv->next) { | |
3116 | if (rv->mtid == mtid) | |
3117 | return rv; | |
3118 | } | |
3119 | ||
3120 | return NULL; | |
3121 | } |