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