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eb5d44eb | 1 | /* |
2 | * IS-IS Rout(e)ing protocol - isis_pdu.c | |
3 | * PDU processing | |
4 | * | |
5 | * Copyright (C) 2001,2002 Sampo Saaristo | |
6 | * Tampere University of Technology | |
7 | * Institute of Communications Engineering | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify it | |
10 | * under the terms of the GNU General Public Licenseas published by the Free | |
11 | * Software Foundation; either version 2 of the License, or (at your option) | |
12 | * any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful,but WITHOUT | |
15 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
16 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
17 | * more details. | |
18 | ||
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write to the Free Software Foundation, Inc., | |
21 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
22 | */ | |
23 | ||
eb5d44eb | 24 | #include <zebra.h> |
eb5d44eb | 25 | |
26 | #include "memory.h" | |
27 | #include "thread.h" | |
28 | #include "linklist.h" | |
29 | #include "log.h" | |
30 | #include "stream.h" | |
31 | #include "vty.h" | |
32 | #include "hash.c" | |
33 | #include "prefix.h" | |
34 | #include "if.h" | |
6a270cd9 | 35 | #include "checksum.h" |
eb5d44eb | 36 | |
37 | #include "isisd/dict.h" | |
38 | #include "isisd/include-netbsd/iso.h" | |
39 | #include "isisd/isis_constants.h" | |
40 | #include "isisd/isis_common.h" | |
41 | #include "isisd/isis_adjacency.h" | |
42 | #include "isisd/isis_circuit.h" | |
43 | #include "isisd/isis_network.h" | |
44 | #include "isisd/isis_misc.h" | |
45 | #include "isisd/isis_dr.h" | |
46 | #include "isisd/isis_flags.h" | |
47 | #include "isisd/isis_tlv.h" | |
48 | #include "isisd/isisd.h" | |
49 | #include "isisd/isis_dynhn.h" | |
50 | #include "isisd/isis_lsp.h" | |
51 | #include "isisd/isis_pdu.h" | |
52 | #include "isisd/iso_checksum.h" | |
53 | #include "isisd/isis_csm.h" | |
54 | #include "isisd/isis_events.h" | |
55 | ||
56 | extern struct thread_master *master; | |
57 | extern struct isis *isis; | |
58 | ||
59 | #define ISIS_MINIMUM_FIXED_HDR_LEN 15 | |
f390d2c7 | 60 | #define ISIS_MIN_PDU_LEN 13 /* partial seqnum pdu with id_len=2 */ |
eb5d44eb | 61 | |
62 | #ifndef PNBBY | |
63 | #define PNBBY 8 | |
64 | #endif /* PNBBY */ | |
65 | ||
66 | /* Utility mask array. */ | |
f390d2c7 | 67 | static u_char maskbit[] = { |
eb5d44eb | 68 | 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff |
69 | }; | |
70 | ||
71 | /* | |
72 | * HELPER FUNCS | |
73 | */ | |
74 | ||
75 | /* | |
76 | * Compares two sets of area addresses | |
77 | */ | |
f390d2c7 | 78 | static int |
eb5d44eb | 79 | area_match (struct list *left, struct list *right) |
80 | { | |
81 | struct area_addr *addr1, *addr2; | |
3fdb2dd9 | 82 | struct listnode *node1, *node2; |
eb5d44eb | 83 | |
3fdb2dd9 | 84 | for (ALL_LIST_ELEMENTS_RO (left, node1, addr1)) |
f390d2c7 | 85 | { |
3fdb2dd9 | 86 | for (ALL_LIST_ELEMENTS_RO (right, node2, addr2)) |
f390d2c7 | 87 | { |
88 | if (addr1->addr_len == addr2->addr_len && | |
89 | !memcmp (addr1->area_addr, addr2->area_addr, (int) addr1->addr_len)) | |
90 | return 1; /* match */ | |
eb5d44eb | 91 | } |
92 | } | |
93 | ||
f390d2c7 | 94 | return 0; /* mismatch */ |
eb5d44eb | 95 | } |
96 | ||
97 | /* | |
98 | * Check if ip2 is in the ip1's network (function like Prefix.h:prefix_match() ) | |
99 | * param ip1 the IS interface ip address structure | |
100 | * param ip2 the IIH's ip address | |
101 | * return 0 the IIH's IP is not in the IS's subnetwork | |
102 | * 1 the IIH's IP is in the IS's subnetwork | |
103 | */ | |
92365889 | 104 | static int |
f390d2c7 | 105 | ip_same_subnet (struct prefix_ipv4 *ip1, struct in_addr *ip2) |
eb5d44eb | 106 | { |
107 | u_char *addr1, *addr2; | |
53c997c9 | 108 | int shift, offset, offsetloop; |
eb5d44eb | 109 | int len; |
f390d2c7 | 110 | |
111 | addr1 = (u_char *) & ip1->prefix.s_addr; | |
112 | addr2 = (u_char *) & ip2->s_addr; | |
eb5d44eb | 113 | len = ip1->prefixlen; |
114 | ||
115 | shift = len % PNBBY; | |
53c997c9 | 116 | offsetloop = offset = len / PNBBY; |
eb5d44eb | 117 | |
53c997c9 | 118 | while (offsetloop--) |
119 | if (addr1[offsetloop] != addr2[offsetloop]) | |
120 | return 0; | |
eb5d44eb | 121 | |
f390d2c7 | 122 | if (shift) |
53c997c9 | 123 | if (maskbit[shift] & (addr1[offset] ^ addr2[offset])) |
124 | return 0; | |
eb5d44eb | 125 | |
f390d2c7 | 126 | return 1; /* match */ |
127 | } | |
eb5d44eb | 128 | |
129 | /* | |
130 | * Compares two set of ip addresses | |
131 | * param left the local interface's ip addresses | |
132 | * param right the iih interface's ip address | |
133 | * return 0 no match; | |
134 | * 1 match; | |
135 | */ | |
f390d2c7 | 136 | static int |
eb5d44eb | 137 | ip_match (struct list *left, struct list *right) |
138 | { | |
139 | struct prefix_ipv4 *ip1; | |
140 | struct in_addr *ip2; | |
3fdb2dd9 | 141 | struct listnode *node1, *node2; |
eb5d44eb | 142 | |
e082ac1d | 143 | if ((left == NULL) || (right == NULL)) |
144 | return 0; | |
145 | ||
3fdb2dd9 | 146 | for (ALL_LIST_ELEMENTS_RO (left, node1, ip1)) |
f390d2c7 | 147 | { |
3fdb2dd9 | 148 | for (ALL_LIST_ELEMENTS_RO (right, node2, ip2)) |
f390d2c7 | 149 | { |
150 | if (ip_same_subnet (ip1, ip2)) | |
151 | { | |
152 | return 1; /* match */ | |
153 | } | |
eb5d44eb | 154 | } |
f390d2c7 | 155 | |
eb5d44eb | 156 | } |
157 | return 0; | |
158 | } | |
159 | ||
160 | /* | |
161 | * Checks whether we should accept a PDU of given level | |
162 | */ | |
163 | static int | |
164 | accept_level (int level, int circuit_t) | |
165 | { | |
f390d2c7 | 166 | int retval = ((circuit_t & level) == level); /* simple approach */ |
eb5d44eb | 167 | |
168 | return retval; | |
169 | } | |
170 | ||
f390d2c7 | 171 | int |
eb5d44eb | 172 | authentication_check (struct isis_passwd *one, struct isis_passwd *theother) |
173 | { | |
f390d2c7 | 174 | if (one->type != theother->type) |
175 | { | |
176 | zlog_warn ("Unsupported authentication type %d", theother->type); | |
177 | return 1; /* Auth fail (different authentication types) */ | |
178 | } | |
179 | switch (one->type) | |
180 | { | |
181 | case ISIS_PASSWD_TYPE_CLEARTXT: | |
182 | if (one->len != theother->len) | |
183 | return 1; /* Auth fail () - passwd len mismatch */ | |
184 | return memcmp (one->passwd, theother->passwd, one->len); | |
185 | break; | |
186 | default: | |
187 | zlog_warn ("Unsupported authentication type"); | |
188 | break; | |
189 | } | |
190 | return 0; /* Auth pass */ | |
eb5d44eb | 191 | } |
192 | ||
193 | /* | |
194 | * Processing helper functions | |
195 | */ | |
92365889 | 196 | static void |
f390d2c7 | 197 | tlvs_to_adj_nlpids (struct tlvs *tlvs, struct isis_adjacency *adj) |
eb5d44eb | 198 | { |
199 | int i; | |
200 | struct nlpids *tlv_nlpids; | |
201 | ||
f390d2c7 | 202 | if (tlvs->nlpids) |
203 | { | |
eb5d44eb | 204 | |
f390d2c7 | 205 | tlv_nlpids = tlvs->nlpids; |
eb5d44eb | 206 | |
f390d2c7 | 207 | adj->nlpids.count = tlv_nlpids->count; |
eb5d44eb | 208 | |
f390d2c7 | 209 | for (i = 0; i < tlv_nlpids->count; i++) |
210 | { | |
211 | adj->nlpids.nlpids[i] = tlv_nlpids->nlpids[i]; | |
212 | } | |
eb5d44eb | 213 | } |
eb5d44eb | 214 | } |
215 | ||
92365889 | 216 | static void |
eb5d44eb | 217 | del_ip_addr (void *val) |
218 | { | |
219 | XFREE (MTYPE_ISIS_TMP, val); | |
220 | } | |
221 | ||
92365889 | 222 | static void |
f390d2c7 | 223 | tlvs_to_adj_ipv4_addrs (struct tlvs *tlvs, struct isis_adjacency *adj) |
eb5d44eb | 224 | { |
3fdb2dd9 | 225 | struct listnode *node; |
eb5d44eb | 226 | struct in_addr *ipv4_addr, *malloced; |
227 | ||
f390d2c7 | 228 | if (adj->ipv4_addrs) |
229 | { | |
230 | adj->ipv4_addrs->del = del_ip_addr; | |
231 | list_delete (adj->ipv4_addrs); | |
232 | } | |
eb5d44eb | 233 | adj->ipv4_addrs = list_new (); |
f390d2c7 | 234 | if (tlvs->ipv4_addrs) |
235 | { | |
3fdb2dd9 | 236 | for (ALL_LIST_ELEMENTS_RO (tlvs->ipv4_addrs, node, ipv4_addr)) |
f390d2c7 | 237 | { |
238 | malloced = XMALLOC (MTYPE_ISIS_TMP, sizeof (struct in_addr)); | |
239 | memcpy (malloced, ipv4_addr, sizeof (struct in_addr)); | |
240 | listnode_add (adj->ipv4_addrs, malloced); | |
241 | } | |
eb5d44eb | 242 | } |
eb5d44eb | 243 | } |
244 | ||
245 | #ifdef HAVE_IPV6 | |
92365889 | 246 | static void |
f390d2c7 | 247 | tlvs_to_adj_ipv6_addrs (struct tlvs *tlvs, struct isis_adjacency *adj) |
eb5d44eb | 248 | { |
3fdb2dd9 | 249 | struct listnode *node; |
eb5d44eb | 250 | struct in6_addr *ipv6_addr, *malloced; |
251 | ||
f390d2c7 | 252 | if (adj->ipv6_addrs) |
253 | { | |
254 | adj->ipv6_addrs->del = del_ip_addr; | |
255 | list_delete (adj->ipv6_addrs); | |
256 | } | |
eb5d44eb | 257 | adj->ipv6_addrs = list_new (); |
f390d2c7 | 258 | if (tlvs->ipv6_addrs) |
259 | { | |
3fdb2dd9 | 260 | for (ALL_LIST_ELEMENTS_RO (tlvs->ipv6_addrs, node, ipv6_addr)) |
f390d2c7 | 261 | { |
262 | malloced = XMALLOC (MTYPE_ISIS_TMP, sizeof (struct in6_addr)); | |
263 | memcpy (malloced, ipv6_addr, sizeof (struct in6_addr)); | |
264 | listnode_add (adj->ipv6_addrs, malloced); | |
265 | } | |
eb5d44eb | 266 | } |
eb5d44eb | 267 | |
268 | } | |
269 | #endif /* HAVE_IPV6 */ | |
270 | ||
eb5d44eb | 271 | /* |
272 | * RECEIVE SIDE | |
273 | */ | |
274 | ||
275 | /* | |
276 | * Process P2P IIH | |
277 | * ISO - 10589 | |
278 | * Section 8.2.5 - Receiving point-to-point IIH PDUs | |
279 | * | |
280 | */ | |
281 | static int | |
282 | process_p2p_hello (struct isis_circuit *circuit) | |
283 | { | |
284 | int retval = ISIS_OK; | |
285 | struct isis_p2p_hello_hdr *hdr; | |
286 | struct isis_adjacency *adj; | |
287 | u_int32_t expected = 0, found; | |
288 | struct tlvs tlvs; | |
289 | ||
f390d2c7 | 290 | if ((stream_get_endp (circuit->rcv_stream) - |
291 | stream_get_getp (circuit->rcv_stream)) < ISIS_P2PHELLO_HDRLEN) | |
292 | { | |
293 | zlog_warn ("Packet too short"); | |
294 | return ISIS_WARNING; | |
295 | } | |
eb5d44eb | 296 | |
297 | /* 8.2.5.1 PDU acceptance tests */ | |
298 | ||
299 | /* 8.2.5.1 a) external domain untrue */ | |
300 | /* FIXME: not useful at all? */ | |
301 | ||
302 | /* 8.2.5.1 b) ID Length mismatch */ | |
303 | /* checked at the handle_pdu */ | |
304 | ||
305 | /* 8.2.5.2 IIH PDU Processing */ | |
306 | ||
307 | /* 8.2.5.2 a) 1) Maximum Area Addresses */ | |
308 | /* Already checked, and can also be ommited */ | |
309 | ||
310 | /* | |
311 | * Get the header | |
312 | */ | |
f390d2c7 | 313 | hdr = (struct isis_p2p_hello_hdr *) STREAM_PNT (circuit->rcv_stream); |
eb5d44eb | 314 | circuit->rcv_stream->getp += ISIS_P2PHELLO_HDRLEN; |
315 | ||
316 | /* hdr.circuit_t = stream_getc (stream); | |
f390d2c7 | 317 | stream_get (hdr.source_id, stream, ISIS_SYS_ID_LEN); |
318 | hdr.hold_time = stream_getw (stream); | |
319 | hdr.pdu_len = stream_getw (stream); | |
320 | hdr.local_id = stream_getc (stream); */ | |
eb5d44eb | 321 | |
322 | /* | |
323 | * My interpertation of the ISO, if no adj exists we will create one for | |
324 | * the circuit | |
325 | */ | |
326 | ||
f390d2c7 | 327 | if (isis->debugs & DEBUG_ADJ_PACKETS) |
328 | { | |
529d65b3 | 329 | zlog_debug ("ISIS-Adj (%s): Rcvd P2P IIH from (%s), cir type %s," |
330 | " cir id %02d, length %d", | |
331 | circuit->area->area_tag, circuit->interface->name, | |
332 | circuit_t2string (circuit->circuit_is_type), | |
333 | circuit->circuit_id, ntohs (hdr->pdu_len)); | |
f390d2c7 | 334 | } |
eb5d44eb | 335 | |
336 | adj = circuit->u.p2p.neighbor; | |
f390d2c7 | 337 | if (!adj) |
338 | { | |
41b36e90 | 339 | adj = isis_new_adj (hdr->source_id, NULL, 0, circuit); |
f390d2c7 | 340 | if (adj == NULL) |
341 | return ISIS_ERROR; | |
342 | circuit->u.p2p.neighbor = adj; | |
343 | isis_adj_state_change (adj, ISIS_ADJ_INITIALIZING, NULL); | |
344 | adj->sys_type = ISIS_SYSTYPE_UNKNOWN; | |
345 | } | |
eb5d44eb | 346 | |
347 | /* 8.2.6 Monitoring point-to-point adjacencies */ | |
348 | adj->hold_time = ntohs (hdr->hold_time); | |
f390d2c7 | 349 | adj->last_upd = time (NULL); |
eb5d44eb | 350 | |
351 | /* | |
352 | * Lets get the TLVS now | |
353 | */ | |
354 | expected |= TLVFLAG_AREA_ADDRS; | |
355 | expected |= TLVFLAG_AUTH_INFO; | |
356 | expected |= TLVFLAG_NLPID; | |
357 | expected |= TLVFLAG_IPV4_ADDR; | |
358 | expected |= TLVFLAG_IPV6_ADDR; | |
359 | ||
360 | retval = parse_tlvs (circuit->area->area_tag, | |
361 | STREAM_PNT (circuit->rcv_stream), | |
f390d2c7 | 362 | ntohs (hdr->pdu_len) - ISIS_P2PHELLO_HDRLEN |
363 | - ISIS_FIXED_HDR_LEN, &expected, &found, &tlvs); | |
364 | ||
365 | if (retval > ISIS_WARNING) | |
366 | { | |
367 | free_tlvs (&tlvs); | |
368 | return retval; | |
369 | }; | |
eb5d44eb | 370 | |
371 | /* 8.2.5.1 c) Authentication */ | |
f390d2c7 | 372 | if (circuit->passwd.type) |
373 | { | |
374 | if (!(found & TLVFLAG_AUTH_INFO) || | |
375 | authentication_check (&circuit->passwd, &tlvs.auth_info)) | |
376 | { | |
377 | isis_event_auth_failure (circuit->area->area_tag, | |
378 | "P2P hello authentication failure", | |
379 | hdr->source_id); | |
380 | return ISIS_OK; | |
381 | } | |
eb5d44eb | 382 | } |
eb5d44eb | 383 | |
384 | /* we do this now because the adj may not survive till the end... */ | |
385 | ||
386 | /* we need to copy addresses to the adj */ | |
f390d2c7 | 387 | tlvs_to_adj_ipv4_addrs (&tlvs, adj); |
eb5d44eb | 388 | |
389 | #ifdef HAVE_IPV6 | |
f390d2c7 | 390 | tlvs_to_adj_ipv6_addrs (&tlvs, adj); |
eb5d44eb | 391 | #endif /* HAVE_IPV6 */ |
392 | ||
393 | /* lets take care of the expiry */ | |
f390d2c7 | 394 | THREAD_TIMER_OFF (adj->t_expire); |
395 | THREAD_TIMER_ON (master, adj->t_expire, isis_adj_expire, adj, | |
396 | (long) adj->hold_time); | |
eb5d44eb | 397 | |
398 | /* 8.2.5.2 a) a match was detected */ | |
f390d2c7 | 399 | if (area_match (circuit->area->area_addrs, tlvs.area_addrs)) |
400 | { | |
401 | /* 8.2.5.2 a) 2) If the system is L1 - table 5 */ | |
402 | if (circuit->area->is_type == IS_LEVEL_1) | |
403 | { | |
404 | switch (hdr->circuit_t) | |
405 | { | |
406 | case IS_LEVEL_1: | |
407 | case IS_LEVEL_1_AND_2: | |
408 | if (adj->adj_state != ISIS_ADJ_UP) | |
409 | { | |
410 | /* (4) adj state up */ | |
411 | isis_adj_state_change (adj, ISIS_ADJ_UP, NULL); | |
412 | /* (5) adj usage level 1 */ | |
413 | adj->adj_usage = ISIS_ADJ_LEVEL1; | |
414 | } | |
415 | else if (adj->adj_usage == ISIS_ADJ_LEVEL1) | |
416 | { | |
417 | ; /* accept */ | |
418 | } | |
419 | break; | |
420 | case IS_LEVEL_2: | |
421 | if (adj->adj_state != ISIS_ADJ_UP) | |
422 | { | |
423 | /* (7) reject - wrong system type event */ | |
424 | zlog_warn ("wrongSystemType"); | |
425 | return ISIS_WARNING; /* Reject */ | |
426 | } | |
427 | else if (adj->adj_usage == ISIS_ADJ_LEVEL1) | |
428 | { | |
429 | /* (6) down - wrong system */ | |
430 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, "Wrong System"); | |
431 | } | |
432 | break; | |
433 | } | |
434 | } | |
eb5d44eb | 435 | |
f390d2c7 | 436 | /* 8.2.5.2 a) 3) If the system is L1L2 - table 6 */ |
437 | if (circuit->area->is_type == IS_LEVEL_1_AND_2) | |
438 | { | |
439 | switch (hdr->circuit_t) | |
440 | { | |
441 | case IS_LEVEL_1: | |
442 | if (adj->adj_state != ISIS_ADJ_UP) | |
443 | { | |
444 | /* (6) adj state up */ | |
445 | isis_adj_state_change (adj, ISIS_ADJ_UP, NULL); | |
446 | /* (7) adj usage level 1 */ | |
447 | adj->adj_usage = ISIS_ADJ_LEVEL1; | |
448 | } | |
449 | else if (adj->adj_usage == ISIS_ADJ_LEVEL1) | |
450 | { | |
451 | ; /* accept */ | |
452 | } | |
453 | else if ((adj->adj_usage == ISIS_ADJ_LEVEL1AND2) || | |
454 | (adj->adj_usage == ISIS_ADJ_LEVEL2)) | |
455 | { | |
456 | /* (8) down - wrong system */ | |
457 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, "Wrong System"); | |
458 | } | |
459 | break; | |
460 | case IS_LEVEL_2: | |
461 | if (adj->adj_state != ISIS_ADJ_UP) | |
462 | { | |
463 | /* (6) adj state up */ | |
464 | isis_adj_state_change (adj, ISIS_ADJ_UP, NULL); | |
465 | /* (9) adj usage level 2 */ | |
466 | adj->adj_usage = ISIS_ADJ_LEVEL2; | |
467 | } | |
468 | else if ((adj->adj_usage == ISIS_ADJ_LEVEL1) || | |
469 | (adj->adj_usage == ISIS_ADJ_LEVEL1AND2)) | |
470 | { | |
471 | /* (8) down - wrong system */ | |
472 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, "Wrong System"); | |
473 | } | |
474 | else if (adj->adj_usage == ISIS_ADJ_LEVEL2) | |
475 | { | |
476 | ; /* Accept */ | |
477 | } | |
478 | break; | |
479 | case IS_LEVEL_1_AND_2: | |
480 | if (adj->adj_state != ISIS_ADJ_UP) | |
481 | { | |
482 | /* (6) adj state up */ | |
483 | isis_adj_state_change (adj, ISIS_ADJ_UP, NULL); | |
484 | /* (10) adj usage level 1 */ | |
485 | adj->adj_usage = ISIS_ADJ_LEVEL1AND2; | |
486 | } | |
487 | else if ((adj->adj_usage == ISIS_ADJ_LEVEL1) || | |
488 | (adj->adj_usage == ISIS_ADJ_LEVEL2)) | |
489 | { | |
490 | /* (8) down - wrong system */ | |
491 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, "Wrong System"); | |
492 | } | |
493 | else if (adj->adj_usage == ISIS_ADJ_LEVEL1AND2) | |
494 | { | |
495 | ; /* Accept */ | |
496 | } | |
497 | break; | |
498 | } | |
499 | } | |
eb5d44eb | 500 | |
f390d2c7 | 501 | /* 8.2.5.2 a) 4) If the system is L2 - table 7 */ |
502 | if (circuit->area->is_type == IS_LEVEL_2) | |
503 | { | |
504 | switch (hdr->circuit_t) | |
505 | { | |
506 | case IS_LEVEL_1: | |
507 | if (adj->adj_state != ISIS_ADJ_UP) | |
508 | { | |
509 | /* (5) reject - wrong system type event */ | |
510 | zlog_warn ("wrongSystemType"); | |
511 | return ISIS_WARNING; /* Reject */ | |
512 | } | |
513 | else if ((adj->adj_usage == ISIS_ADJ_LEVEL1AND2) || | |
514 | (adj->adj_usage == ISIS_ADJ_LEVEL2)) | |
515 | { | |
516 | /* (6) down - wrong system */ | |
517 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, "Wrong System"); | |
518 | } | |
519 | break; | |
520 | case IS_LEVEL_1_AND_2: | |
521 | case IS_LEVEL_2: | |
522 | if (adj->adj_state != ISIS_ADJ_UP) | |
523 | { | |
524 | /* (7) adj state up */ | |
525 | isis_adj_state_change (adj, ISIS_ADJ_UP, NULL); | |
526 | /* (8) adj usage level 2 */ | |
527 | adj->adj_usage = ISIS_ADJ_LEVEL2; | |
528 | } | |
529 | else if (adj->adj_usage == ISIS_ADJ_LEVEL1AND2) | |
530 | { | |
531 | /* (6) down - wrong system */ | |
532 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, "Wrong System"); | |
533 | } | |
534 | else if (adj->adj_usage == ISIS_ADJ_LEVEL2) | |
535 | { | |
536 | ; /* Accept */ | |
537 | } | |
538 | break; | |
539 | } | |
540 | } | |
eb5d44eb | 541 | } |
eb5d44eb | 542 | /* 8.2.5.2 b) if no match was detected */ |
543 | else | |
eb5d44eb | 544 | { |
f390d2c7 | 545 | if (circuit->area->is_type == IS_LEVEL_1) |
546 | { | |
547 | /* 8.2.5.2 b) 1) is_type L1 and adj is not up */ | |
548 | if (adj->adj_state != ISIS_ADJ_UP) | |
549 | { | |
550 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, "Area Mismatch"); | |
551 | /* 8.2.5.2 b) 2)is_type L1 and adj is up */ | |
552 | } | |
553 | else | |
554 | { | |
555 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, | |
556 | "Down - Area Mismatch"); | |
557 | } | |
558 | } | |
559 | /* 8.2.5.2 b 3 If the system is L2 or L1L2 - table 8 */ | |
560 | else | |
561 | { | |
562 | switch (hdr->circuit_t) | |
563 | { | |
564 | case IS_LEVEL_1: | |
565 | if (adj->adj_state != ISIS_ADJ_UP) | |
566 | { | |
567 | /* (6) reject - Area Mismatch event */ | |
568 | zlog_warn ("AreaMismatch"); | |
569 | return ISIS_WARNING; /* Reject */ | |
570 | } | |
571 | else if (adj->adj_usage == ISIS_ADJ_LEVEL1) | |
572 | { | |
573 | /* (7) down - area mismatch */ | |
574 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, "Area Mismatch"); | |
575 | ||
576 | } | |
577 | else if ((adj->adj_usage == ISIS_ADJ_LEVEL1AND2) || | |
578 | (adj->adj_usage == ISIS_ADJ_LEVEL2)) | |
579 | { | |
580 | /* (7) down - wrong system */ | |
581 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, "Wrong System"); | |
582 | } | |
583 | break; | |
584 | case IS_LEVEL_1_AND_2: | |
585 | case IS_LEVEL_2: | |
586 | if (adj->adj_state != ISIS_ADJ_UP) | |
587 | { | |
588 | /* (8) adj state up */ | |
589 | isis_adj_state_change (adj, ISIS_ADJ_UP, NULL); | |
590 | /* (9) adj usage level 2 */ | |
591 | adj->adj_usage = ISIS_ADJ_LEVEL2; | |
592 | } | |
593 | else if (adj->adj_usage == ISIS_ADJ_LEVEL1) | |
594 | { | |
595 | /* (7) down - wrong system */ | |
596 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, "Wrong System"); | |
597 | } | |
598 | else if (adj->adj_usage == ISIS_ADJ_LEVEL1AND2) | |
599 | { | |
600 | if (hdr->circuit_t == IS_LEVEL_2) | |
601 | { | |
602 | /* (7) down - wrong system */ | |
603 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, | |
604 | "Wrong System"); | |
605 | } | |
606 | else | |
607 | { | |
608 | /* (7) down - area mismatch */ | |
609 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, | |
610 | "Area Mismatch"); | |
611 | } | |
612 | } | |
613 | else if (adj->adj_usage == ISIS_ADJ_LEVEL2) | |
614 | { | |
615 | ; /* Accept */ | |
616 | } | |
617 | break; | |
618 | } | |
619 | } | |
eb5d44eb | 620 | } |
eb5d44eb | 621 | /* 8.2.5.2 c) if the action was up - comparing circuit IDs */ |
622 | /* FIXME - Missing parts */ | |
623 | ||
eb5d44eb | 624 | /* some of my own understanding of the ISO, why the heck does |
625 | * it not say what should I change the system_type to... | |
626 | */ | |
f390d2c7 | 627 | switch (adj->adj_usage) |
628 | { | |
eb5d44eb | 629 | case ISIS_ADJ_LEVEL1: |
630 | adj->sys_type = ISIS_SYSTYPE_L1_IS; | |
631 | break; | |
632 | case ISIS_ADJ_LEVEL2: | |
633 | adj->sys_type = ISIS_SYSTYPE_L2_IS; | |
634 | break; | |
635 | case ISIS_ADJ_LEVEL1AND2: | |
636 | adj->sys_type = ISIS_SYSTYPE_L2_IS; | |
637 | break; | |
638 | case ISIS_ADJ_NONE: | |
639 | adj->sys_type = ISIS_SYSTYPE_UNKNOWN; | |
640 | break; | |
f390d2c7 | 641 | } |
eb5d44eb | 642 | |
643 | adj->circuit_t = hdr->circuit_t; | |
644 | adj->level = hdr->circuit_t; | |
645 | ||
646 | free_tlvs (&tlvs); | |
647 | ||
648 | return retval; | |
649 | } | |
650 | ||
eb5d44eb | 651 | /* |
652 | * Process IS-IS LAN Level 1/2 Hello PDU | |
653 | */ | |
f390d2c7 | 654 | static int |
655 | process_lan_hello (int level, struct isis_circuit *circuit, u_char * ssnpa) | |
eb5d44eb | 656 | { |
657 | int retval = ISIS_OK; | |
658 | struct isis_lan_hello_hdr hdr; | |
659 | struct isis_adjacency *adj; | |
660 | u_int32_t expected = 0, found; | |
661 | struct tlvs tlvs; | |
662 | u_char *snpa; | |
3fdb2dd9 | 663 | struct listnode *node; |
eb5d44eb | 664 | |
f390d2c7 | 665 | if ((stream_get_endp (circuit->rcv_stream) - |
666 | stream_get_getp (circuit->rcv_stream)) < ISIS_LANHELLO_HDRLEN) | |
667 | { | |
668 | zlog_warn ("Packet too short"); | |
669 | return ISIS_WARNING; | |
670 | } | |
eb5d44eb | 671 | |
f390d2c7 | 672 | if (circuit->ext_domain) |
673 | { | |
529d65b3 | 674 | zlog_debug ("level %d LAN Hello received over circuit with " |
675 | "externalDomain = true", level); | |
f390d2c7 | 676 | return ISIS_WARNING; |
677 | } | |
eb5d44eb | 678 | |
f390d2c7 | 679 | if (!accept_level (level, circuit->circuit_is_type)) |
680 | { | |
681 | if (isis->debugs & DEBUG_ADJ_PACKETS) | |
682 | { | |
529d65b3 | 683 | zlog_debug ("ISIS-Adj (%s): Interface level mismatch, %s", |
684 | circuit->area->area_tag, circuit->interface->name); | |
f390d2c7 | 685 | } |
686 | return ISIS_WARNING; | |
eb5d44eb | 687 | } |
eb5d44eb | 688 | |
689 | #if 0 | |
690 | /* Cisco's debug message compatability */ | |
f390d2c7 | 691 | if (!accept_level (level, circuit->area->is_type)) |
692 | { | |
693 | if (isis->debugs & DEBUG_ADJ_PACKETS) | |
694 | { | |
529d65b3 | 695 | zlog_debug ("ISIS-Adj (%s): is type mismatch", |
696 | circuit->area->area_tag); | |
f390d2c7 | 697 | } |
698 | return ISIS_WARNING; | |
eb5d44eb | 699 | } |
eb5d44eb | 700 | #endif |
701 | /* | |
702 | * Fill the header | |
703 | */ | |
704 | hdr.circuit_t = stream_getc (circuit->rcv_stream); | |
705 | stream_get (hdr.source_id, circuit->rcv_stream, ISIS_SYS_ID_LEN); | |
706 | hdr.hold_time = stream_getw (circuit->rcv_stream); | |
f390d2c7 | 707 | hdr.pdu_len = stream_getw (circuit->rcv_stream); |
708 | hdr.prio = stream_getc (circuit->rcv_stream); | |
eb5d44eb | 709 | stream_get (hdr.lan_id, circuit->rcv_stream, ISIS_SYS_ID_LEN + 1); |
710 | ||
711 | if (hdr.circuit_t != IS_LEVEL_1 && hdr.circuit_t != IS_LEVEL_2 && | |
f390d2c7 | 712 | hdr.circuit_t != IS_LEVEL_1_AND_2) |
713 | { | |
714 | zlog_warn ("Level %d LAN Hello with Circuit Type %d", level, | |
715 | hdr.circuit_t); | |
716 | return ISIS_ERROR; | |
717 | } | |
eb5d44eb | 718 | /* |
719 | * Then get the tlvs | |
720 | */ | |
721 | expected |= TLVFLAG_AUTH_INFO; | |
722 | expected |= TLVFLAG_AREA_ADDRS; | |
723 | expected |= TLVFLAG_LAN_NEIGHS; | |
724 | expected |= TLVFLAG_NLPID; | |
725 | expected |= TLVFLAG_IPV4_ADDR; | |
726 | expected |= TLVFLAG_IPV6_ADDR; | |
727 | ||
728 | retval = parse_tlvs (circuit->area->area_tag, | |
f390d2c7 | 729 | STREAM_PNT (circuit->rcv_stream), |
730 | hdr.pdu_len - ISIS_LANHELLO_HDRLEN - | |
731 | ISIS_FIXED_HDR_LEN, &expected, &found, &tlvs); | |
eb5d44eb | 732 | |
f390d2c7 | 733 | if (retval > ISIS_WARNING) |
734 | { | |
735 | zlog_warn ("parse_tlvs() failed"); | |
736 | goto out; | |
737 | } | |
eb5d44eb | 738 | |
f390d2c7 | 739 | if (!(found & TLVFLAG_AREA_ADDRS)) |
740 | { | |
741 | zlog_warn ("No Area addresses TLV in Level %d LAN IS to IS hello", | |
742 | level); | |
eb5d44eb | 743 | retval = ISIS_WARNING; |
744 | goto out; | |
745 | } | |
f390d2c7 | 746 | |
747 | if (circuit->passwd.type) | |
748 | { | |
749 | if (!(found & TLVFLAG_AUTH_INFO) || | |
750 | authentication_check (&circuit->passwd, &tlvs.auth_info)) | |
751 | { | |
752 | isis_event_auth_failure (circuit->area->area_tag, | |
753 | "LAN hello authentication failure", | |
754 | hdr.source_id); | |
755 | retval = ISIS_WARNING; | |
756 | goto out; | |
757 | } | |
758 | } | |
eb5d44eb | 759 | |
760 | /* | |
761 | * Accept the level 1 adjacency only if a match between local and | |
762 | * remote area addresses is found | |
763 | */ | |
f390d2c7 | 764 | if (level == 1 && !area_match (circuit->area->area_addrs, tlvs.area_addrs)) |
765 | { | |
766 | if (isis->debugs & DEBUG_ADJ_PACKETS) | |
767 | { | |
529d65b3 | 768 | zlog_debug ("ISIS-Adj (%s): Area mismatch, level %d IIH on %s", |
769 | circuit->area->area_tag, level, | |
770 | circuit->interface->name); | |
f390d2c7 | 771 | } |
772 | retval = ISIS_OK; | |
773 | goto out; | |
eb5d44eb | 774 | } |
eb5d44eb | 775 | |
776 | /* | |
777 | * it's own IIH PDU - discard silently | |
f390d2c7 | 778 | */ |
779 | if (!memcmp (circuit->u.bc.snpa, ssnpa, ETH_ALEN)) | |
780 | { | |
529d65b3 | 781 | zlog_debug ("ISIS-Adj (%s): it's own IIH PDU - discarded", |
782 | circuit->area->area_tag); | |
eb5d44eb | 783 | |
f390d2c7 | 784 | retval = ISIS_OK; |
785 | goto out; | |
786 | } | |
eb5d44eb | 787 | |
788 | /* | |
789 | * check if it's own interface ip match iih ip addrs | |
790 | */ | |
f390d2c7 | 791 | if (!(found & TLVFLAG_IPV4_ADDR) |
792 | || !ip_match (circuit->ip_addrs, tlvs.ipv4_addrs)) | |
793 | { | |
529d65b3 | 794 | zlog_debug |
f390d2c7 | 795 | ("ISIS-Adj: No usable IP interface addresses in LAN IIH from %s\n", |
796 | circuit->interface->name); | |
797 | retval = ISIS_WARNING; | |
798 | goto out; | |
799 | } | |
eb5d44eb | 800 | |
801 | adj = isis_adj_lookup (hdr.source_id, circuit->u.bc.adjdb[level - 1]); | |
f390d2c7 | 802 | if (!adj) |
803 | { | |
804 | /* | |
805 | * Do as in 8.4.2.5 | |
806 | */ | |
807 | adj = isis_new_adj (hdr.source_id, ssnpa, level, circuit); | |
808 | if (adj == NULL) | |
13c48f72 | 809 | { |
810 | retval = ISIS_ERROR; | |
811 | goto out; | |
812 | } | |
eb5d44eb | 813 | |
f390d2c7 | 814 | adj->level = level; |
815 | isis_adj_state_change (adj, ISIS_ADJ_INITIALIZING, NULL); | |
eb5d44eb | 816 | |
f390d2c7 | 817 | if (level == 1) |
818 | { | |
819 | adj->sys_type = ISIS_SYSTYPE_L1_IS; | |
820 | } | |
821 | else | |
822 | { | |
823 | adj->sys_type = ISIS_SYSTYPE_L2_IS; | |
824 | } | |
825 | list_delete_all_node (circuit->u.bc.lan_neighs[level - 1]); | |
826 | isis_adj_build_neigh_list (circuit->u.bc.adjdb[level - 1], | |
827 | circuit->u.bc.lan_neighs[level - 1]); | |
eb5d44eb | 828 | } |
eb5d44eb | 829 | |
a211d65d | 830 | if(adj->dis_record[level-1].dis==ISIS_IS_DIS) |
831 | switch (level) | |
832 | { | |
833 | case 1: | |
834 | if (memcmp (circuit->u.bc.l1_desig_is, hdr.lan_id, ISIS_SYS_ID_LEN + 1)) | |
835 | { | |
836 | thread_add_event (master, isis_event_dis_status_change, circuit, 0); | |
64a7afd6 | 837 | memcpy (&circuit->u.bc.l1_desig_is, hdr.lan_id, |
838 | ISIS_SYS_ID_LEN + 1); | |
a211d65d | 839 | } |
840 | break; | |
841 | case 2: | |
842 | if (memcmp (circuit->u.bc.l2_desig_is, hdr.lan_id, ISIS_SYS_ID_LEN + 1)) | |
843 | { | |
844 | thread_add_event (master, isis_event_dis_status_change, circuit, 0); | |
64a7afd6 | 845 | memcpy (&circuit->u.bc.l2_desig_is, hdr.lan_id, |
846 | ISIS_SYS_ID_LEN + 1); | |
a211d65d | 847 | } |
848 | break; | |
849 | } | |
eb5d44eb | 850 | |
851 | adj->hold_time = hdr.hold_time; | |
f390d2c7 | 852 | adj->last_upd = time (NULL); |
853 | adj->prio[level - 1] = hdr.prio; | |
eb5d44eb | 854 | |
855 | memcpy (adj->lanid, hdr.lan_id, ISIS_SYS_ID_LEN + 1); | |
856 | ||
857 | /* which protocol are spoken ??? */ | |
f390d2c7 | 858 | if (found & TLVFLAG_NLPID) |
eb5d44eb | 859 | tlvs_to_adj_nlpids (&tlvs, adj); |
860 | ||
861 | /* we need to copy addresses to the adj */ | |
f390d2c7 | 862 | if (found & TLVFLAG_IPV4_ADDR) |
eb5d44eb | 863 | tlvs_to_adj_ipv4_addrs (&tlvs, adj); |
864 | ||
865 | #ifdef HAVE_IPV6 | |
f390d2c7 | 866 | if (found & TLVFLAG_IPV6_ADDR) |
eb5d44eb | 867 | tlvs_to_adj_ipv6_addrs (&tlvs, adj); |
868 | #endif /* HAVE_IPV6 */ | |
869 | ||
870 | adj->circuit_t = hdr.circuit_t; | |
871 | ||
872 | /* lets take care of the expiry */ | |
f390d2c7 | 873 | THREAD_TIMER_OFF (adj->t_expire); |
874 | THREAD_TIMER_ON (master, adj->t_expire, isis_adj_expire, adj, | |
875 | (long) adj->hold_time); | |
eb5d44eb | 876 | |
877 | /* | |
878 | * If the snpa for this circuit is found from LAN Neighbours TLV | |
879 | * we have two-way communication -> adjacency can be put to state "up" | |
880 | */ | |
881 | ||
f390d2c7 | 882 | if (found & TLVFLAG_LAN_NEIGHS) |
883 | { | |
884 | if (adj->adj_state != ISIS_ADJ_UP) | |
885 | { | |
3fdb2dd9 | 886 | for (ALL_LIST_ELEMENTS_RO (tlvs.lan_neighs, node, snpa)) |
f390d2c7 | 887 | if (!memcmp (snpa, circuit->u.bc.snpa, ETH_ALEN)) |
888 | { | |
889 | isis_adj_state_change (adj, ISIS_ADJ_UP, | |
890 | "own SNPA found in LAN Neighbours TLV"); | |
891 | } | |
892 | } | |
eb5d44eb | 893 | } |
eb5d44eb | 894 | |
f390d2c7 | 895 | out: |
eb5d44eb | 896 | /* DEBUG_ADJ_PACKETS */ |
f390d2c7 | 897 | if (isis->debugs & DEBUG_ADJ_PACKETS) |
898 | { | |
899 | /* FIXME: is this place right? fix missing info */ | |
529d65b3 | 900 | zlog_debug ("ISIS-Adj (%s): Rcvd L%d LAN IIH from %s on %s, cirType %s, " |
901 | "cirID %u, length %ld", | |
902 | circuit->area->area_tag, | |
903 | level, snpa_print (ssnpa), circuit->interface->name, | |
904 | circuit_t2string (circuit->circuit_is_type), | |
29e50b23 | 905 | circuit->circuit_id, |
906 | /* FIXME: use %z when we stop supporting old compilers. */ | |
907 | (unsigned long) stream_get_endp (circuit->rcv_stream)); | |
f390d2c7 | 908 | } |
eb5d44eb | 909 | |
910 | free_tlvs (&tlvs); | |
911 | ||
912 | return retval; | |
913 | } | |
914 | ||
915 | /* | |
916 | * Process Level 1/2 Link State | |
917 | * ISO - 10589 | |
918 | * Section 7.3.15.1 - Action on receipt of a link state PDU | |
f390d2c7 | 919 | */ |
920 | static int | |
921 | process_lsp (int level, struct isis_circuit *circuit, u_char * ssnpa) | |
eb5d44eb | 922 | { |
923 | struct isis_link_state_hdr *hdr; | |
924 | struct isis_adjacency *adj = NULL; | |
925 | struct isis_lsp *lsp, *lsp0 = NULL; | |
926 | int retval = ISIS_OK, comp = 0; | |
927 | u_char lspid[ISIS_SYS_ID_LEN + 2]; | |
928 | struct isis_passwd *passwd; | |
929 | ||
930 | /* Sanity check - FIXME: move to correct place */ | |
f390d2c7 | 931 | if ((stream_get_endp (circuit->rcv_stream) - |
932 | stream_get_getp (circuit->rcv_stream)) < ISIS_LSP_HDR_LEN) | |
933 | { | |
934 | zlog_warn ("Packet too short"); | |
935 | return ISIS_WARNING; | |
936 | } | |
eb5d44eb | 937 | |
938 | /* Reference the header */ | |
f390d2c7 | 939 | hdr = (struct isis_link_state_hdr *) STREAM_PNT (circuit->rcv_stream); |
940 | ||
941 | if (isis->debugs & DEBUG_UPDATE_PACKETS) | |
942 | { | |
529d65b3 | 943 | zlog_debug ("ISIS-Upd (%s): Rcvd L%d LSP %s, seq 0x%08x, cksum 0x%04x, " |
944 | "lifetime %us, len %lu, on %s", | |
945 | circuit->area->area_tag, | |
946 | level, | |
947 | rawlspid_print (hdr->lsp_id), | |
948 | ntohl (hdr->seq_num), | |
949 | ntohs (hdr->checksum), | |
950 | ntohs (hdr->rem_lifetime), | |
29e50b23 | 951 | /* FIXME: use %z when we stop supporting old compilers. */ |
952 | (unsigned long) stream_get_endp (circuit->rcv_stream), | |
15935e9a | 953 | circuit->interface->name); |
f390d2c7 | 954 | } |
eb5d44eb | 955 | |
956 | assert (ntohs (hdr->pdu_len) > ISIS_LSP_HDR_LEN); | |
957 | ||
958 | /* Checksum sanity check - FIXME: move to correct place */ | |
959 | /* 12 = sysid+pdu+remtime */ | |
f390d2c7 | 960 | if (iso_csum_verify (STREAM_PNT (circuit->rcv_stream) + 4, |
961 | ntohs (hdr->pdu_len) - 12, &hdr->checksum)) | |
962 | { | |
529d65b3 | 963 | zlog_debug ("ISIS-Upd (%s): LSP %s invalid LSP checksum 0x%04x", |
964 | circuit->area->area_tag, | |
965 | rawlspid_print (hdr->lsp_id), ntohs (hdr->checksum)); | |
f390d2c7 | 966 | |
967 | return ISIS_WARNING; | |
968 | } | |
eb5d44eb | 969 | |
970 | /* 7.3.15.1 a) 1 - external domain circuit will discard lsps */ | |
f390d2c7 | 971 | if (circuit->ext_domain) |
972 | { | |
529d65b3 | 973 | zlog_debug |
f390d2c7 | 974 | ("ISIS-Upd (%s): LSP %s received at level %d over circuit with " |
975 | "externalDomain = true", circuit->area->area_tag, | |
976 | rawlspid_print (hdr->lsp_id), level); | |
977 | ||
978 | return ISIS_WARNING; | |
979 | } | |
eb5d44eb | 980 | |
981 | /* 7.3.15.1 a) 2,3 - manualL2OnlyMode not implemented */ | |
f390d2c7 | 982 | if (!accept_level (level, circuit->circuit_is_type)) |
983 | { | |
529d65b3 | 984 | zlog_debug ("ISIS-Upd (%s): LSP %s received at level %d over circuit of" |
985 | " type %s", | |
986 | circuit->area->area_tag, | |
987 | rawlspid_print (hdr->lsp_id), | |
988 | level, circuit_t2string (circuit->circuit_is_type)); | |
f390d2c7 | 989 | |
990 | return ISIS_WARNING; | |
991 | } | |
eb5d44eb | 992 | |
993 | /* 7.3.15.1 a) 4 - need to make sure IDLength matches */ | |
994 | ||
995 | /* 7.3.15.1 a) 5 - maximum area match, can be ommited since we only use 3 */ | |
996 | ||
997 | /* 7.3.15.1 a) 7 - password check */ | |
998 | (level == ISIS_LEVEL1) ? (passwd = &circuit->area->area_passwd) : | |
999 | (passwd = &circuit->area->domain_passwd); | |
f390d2c7 | 1000 | if (passwd->type) |
1001 | { | |
1002 | if (isis_lsp_authinfo_check (circuit->rcv_stream, circuit->area, | |
1003 | ntohs (hdr->pdu_len), passwd)) | |
1004 | { | |
1005 | isis_event_auth_failure (circuit->area->area_tag, | |
1006 | "LSP authentication failure", hdr->lsp_id); | |
1007 | return ISIS_WARNING; | |
1008 | } | |
eb5d44eb | 1009 | } |
eb5d44eb | 1010 | /* Find the LSP in our database and compare it to this Link State header */ |
1011 | lsp = lsp_search (hdr->lsp_id, circuit->area->lspdb[level - 1]); | |
1012 | if (lsp) | |
f390d2c7 | 1013 | comp = lsp_compare (circuit->area->area_tag, lsp, hdr->seq_num, |
1014 | hdr->checksum, hdr->rem_lifetime); | |
1015 | if (lsp && (lsp->own_lsp | |
eb5d44eb | 1016 | #ifdef TOPOLOGY_GENERATE |
f390d2c7 | 1017 | || lsp->from_topology |
eb5d44eb | 1018 | #endif /* TOPOLOGY_GENERATE */ |
f390d2c7 | 1019 | )) |
eb5d44eb | 1020 | goto dontcheckadj; |
1021 | ||
1022 | /* 7.3.15.1 a) 6 - Must check that we have an adjacency of the same level */ | |
1023 | /* for broadcast circuits, snpa should be compared */ | |
1024 | /* FIXME : Point To Point */ | |
1025 | ||
f390d2c7 | 1026 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) |
1027 | { | |
1028 | adj = isis_adj_lookup_snpa (ssnpa, circuit->u.bc.adjdb[level - 1]); | |
1029 | if (!adj) | |
1030 | { | |
529d65b3 | 1031 | zlog_debug ("(%s): DS ======= LSP %s, seq 0x%08x, cksum 0x%04x, " |
1032 | "lifetime %us on %s", | |
1033 | circuit->area->area_tag, | |
1034 | rawlspid_print (hdr->lsp_id), | |
1035 | ntohl (hdr->seq_num), | |
1036 | ntohs (hdr->checksum), | |
1037 | ntohs (hdr->rem_lifetime), circuit->interface->name); | |
f390d2c7 | 1038 | return ISIS_WARNING; /* Silently discard */ |
1039 | } | |
eb5d44eb | 1040 | } |
eb5d44eb | 1041 | |
1042 | /* for non broadcast, we just need to find same level adj */ | |
f390d2c7 | 1043 | else |
1044 | { | |
1045 | /* If no adj, or no sharing of level */ | |
1046 | if (!circuit->u.p2p.neighbor) | |
1047 | { | |
1048 | return ISIS_OK; /* Silently discard */ | |
1049 | } | |
1050 | else | |
1051 | { | |
1052 | if (((level == 1) && | |
1053 | (circuit->u.p2p.neighbor->adj_usage == ISIS_ADJ_LEVEL2)) || | |
1054 | ((level == 2) && | |
1055 | (circuit->u.p2p.neighbor->adj_usage == ISIS_ADJ_LEVEL1))) | |
1056 | return ISIS_WARNING; /* Silently discard */ | |
1057 | } | |
eb5d44eb | 1058 | } |
f390d2c7 | 1059 | dontcheckadj: |
eb5d44eb | 1060 | /* 7.3.15.1 a) 7 - Passwords for level 1 - not implemented */ |
1061 | ||
1062 | /* 7.3.15.1 a) 8 - Passwords for level 2 - not implemented */ | |
1063 | ||
f390d2c7 | 1064 | /* 7.3.15.1 a) 9 - OriginatingLSPBufferSize - not implemented FIXME: do it */ |
1065 | ||
1066 | /* 7.3.15.1 b) - If the remaining life time is 0, we perform 7.3.16.4 */ | |
1067 | if (hdr->rem_lifetime == 0) | |
1068 | { | |
1069 | if (!lsp) | |
1070 | { | |
1071 | /* 7.3.16.4 a) 1) No LSP in db -> send an ack, but don't save */ | |
1072 | /* only needed on explicit update, eg - p2p */ | |
1073 | if (circuit->circ_type == CIRCUIT_T_P2P) | |
1074 | ack_lsp (hdr, circuit, level); | |
1075 | return retval; /* FIXME: do we need a purge? */ | |
1076 | } | |
1077 | else | |
1078 | { | |
1079 | if (memcmp (hdr->lsp_id, isis->sysid, ISIS_SYS_ID_LEN)) | |
1080 | { | |
1081 | /* LSP by some other system -> do 7.3.16.4 b) */ | |
1082 | /* 7.3.16.4 b) 1) */ | |
1083 | if (comp == LSP_NEWER) | |
1084 | { | |
a96d8d10 | 1085 | lsp_update (lsp, hdr, circuit->rcv_stream, circuit->area, |
1086 | level); | |
f390d2c7 | 1087 | /* ii */ |
1088 | ISIS_FLAGS_SET_ALL (lsp->SRMflags); | |
1089 | /* iii */ | |
1090 | ISIS_CLEAR_FLAG (lsp->SRMflags, circuit); | |
1091 | /* v */ | |
1092 | ISIS_FLAGS_CLEAR_ALL (lsp->SSNflags); /* FIXME: OTHER than c */ | |
1093 | /* iv */ | |
1094 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
1095 | ISIS_SET_FLAG (lsp->SSNflags, circuit); | |
1096 | ||
1097 | } /* 7.3.16.4 b) 2) */ | |
1098 | else if (comp == LSP_EQUAL) | |
1099 | { | |
1100 | /* i */ | |
1101 | ISIS_CLEAR_FLAG (lsp->SRMflags, circuit); | |
1102 | /* ii */ | |
1103 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
1104 | ISIS_SET_FLAG (lsp->SSNflags, circuit); | |
1105 | } /* 7.3.16.4 b) 3) */ | |
1106 | else | |
1107 | { | |
1108 | ISIS_SET_FLAG (lsp->SRMflags, circuit); | |
1109 | ISIS_CLEAR_FLAG (lsp->SSNflags, circuit); | |
1110 | } | |
1111 | } | |
1112 | else | |
1113 | { | |
1114 | /* our own LSP -> 7.3.16.4 c) */ | |
1115 | if (LSP_PSEUDO_ID (lsp->lsp_header->lsp_id) != | |
1116 | circuit->circuit_id | |
1117 | || (LSP_PSEUDO_ID (lsp->lsp_header->lsp_id) == | |
1118 | circuit->circuit_id | |
1119 | && circuit->u.bc.is_dr[level - 1] == 1)) | |
1120 | { | |
1121 | lsp->lsp_header->seq_num = htonl (ntohl (hdr->seq_num) + 1); | |
c89c05dd | 1122 | if (isis->debugs & DEBUG_UPDATE_PACKETS) |
1123 | zlog_debug ("LSP LEN: %d", | |
1124 | ntohs (lsp->lsp_header->pdu_len)); | |
6a270cd9 | 1125 | fletcher_checksum (STREAM_DATA (lsp->pdu) + 12, |
f390d2c7 | 1126 | ntohs (lsp->lsp_header->pdu_len) - 12, 12); |
1127 | ISIS_FLAGS_SET_ALL (lsp->SRMflags); | |
c89c05dd | 1128 | if (isis->debugs & DEBUG_UPDATE_PACKETS) |
1129 | zlog_debug ("ISIS-Upd (%s): (1) re-originating LSP %s new " | |
1130 | "seq 0x%08x", circuit->area->area_tag, | |
1131 | rawlspid_print (hdr->lsp_id), | |
1132 | ntohl (lsp->lsp_header->seq_num)); | |
f390d2c7 | 1133 | lsp->lsp_header->rem_lifetime = |
1134 | htons (isis_jitter | |
1135 | (circuit->area->max_lsp_lifetime[level - 1], | |
1136 | MAX_AGE_JITTER)); | |
1137 | } | |
1138 | else | |
1139 | { | |
1140 | /* Got purge for own pseudo-lsp, and we are not DR */ | |
1141 | lsp_purge_dr (lsp->lsp_header->lsp_id, circuit, level); | |
1142 | } | |
1143 | } | |
1144 | } | |
1145 | return retval; | |
eb5d44eb | 1146 | } |
eb5d44eb | 1147 | /* 7.3.15.1 c) - If this is our own lsp and we don't have it initiate a |
1148 | * purge */ | |
f390d2c7 | 1149 | if (memcmp (hdr->lsp_id, isis->sysid, ISIS_SYS_ID_LEN) == 0) |
1150 | { | |
1151 | if (!lsp) | |
1152 | { | |
1153 | /* 7.3.16.4: initiate a purge */ | |
1154 | lsp_purge_non_exist (hdr, circuit->area); | |
1155 | return ISIS_OK; | |
1156 | } | |
1157 | /* 7.3.15.1 d) - If this is our own lsp and we have it */ | |
1158 | ||
1159 | /* In 7.3.16.1, If an Intermediate system R somewhere in the domain | |
1160 | * has information that the current sequence number for source S is | |
1161 | * "greater" than that held by S, ... */ | |
1162 | ||
1163 | else if (ntohl (hdr->seq_num) > ntohl (lsp->lsp_header->seq_num)) | |
1164 | { | |
1165 | /* 7.3.16.1 */ | |
1166 | lsp->lsp_header->seq_num = htonl (ntohl (hdr->seq_num) + 1); | |
1167 | ||
6a270cd9 | 1168 | fletcher_checksum (STREAM_DATA (lsp->pdu) + 12, |
f390d2c7 | 1169 | ntohs (lsp->lsp_header->pdu_len) - 12, 12); |
1170 | ||
1171 | ISIS_FLAGS_SET_ALL (lsp->SRMflags); | |
c89c05dd | 1172 | if (isis->debugs & DEBUG_UPDATE_PACKETS) |
1173 | zlog_debug ("ISIS-Upd (%s): (2) re-originating LSP %s new seq " | |
1174 | "0x%08x", circuit->area->area_tag, | |
1175 | rawlspid_print (hdr->lsp_id), | |
1176 | ntohl (lsp->lsp_header->seq_num)); | |
f390d2c7 | 1177 | lsp->lsp_header->rem_lifetime = |
1178 | htons (isis_jitter | |
1179 | (circuit->area->max_lsp_lifetime[level - 1], | |
1180 | MAX_AGE_JITTER)); | |
1181 | } | |
eb5d44eb | 1182 | } |
f390d2c7 | 1183 | else |
1184 | { | |
1185 | /* 7.3.15.1 e) - This lsp originated on another system */ | |
1186 | ||
1187 | /* 7.3.15.1 e) 1) LSP newer than the one in db or no LSP in db */ | |
1188 | if ((!lsp || comp == LSP_NEWER)) | |
1189 | { | |
1190 | /* i */ | |
1191 | if (lsp) | |
1192 | { | |
eb5d44eb | 1193 | #ifdef EXTREME_DEBUG |
529d65b3 | 1194 | zlog_debug ("level %d number is - %ld", level, |
1195 | circuit->area->lspdb[level - 1]->dict_nodecount); | |
eb5d44eb | 1196 | #endif /* EXTREME DEBUG */ |
f390d2c7 | 1197 | lsp_search_and_destroy (hdr->lsp_id, |
1198 | circuit->area->lspdb[level - 1]); | |
1199 | /* exists, so we overwrite */ | |
eb5d44eb | 1200 | #ifdef EXTREME_DEBUG |
529d65b3 | 1201 | zlog_debug ("level %d number is - %ld", level, |
1202 | circuit->area->lspdb[level - 1]->dict_nodecount); | |
eb5d44eb | 1203 | #endif /* EXTREME DEBUG */ |
f390d2c7 | 1204 | } |
1205 | /* | |
1206 | * If this lsp is a frag, need to see if we have zero lsp present | |
1207 | */ | |
1208 | if (LSP_FRAGMENT (hdr->lsp_id) != 0) | |
1209 | { | |
1210 | memcpy (lspid, hdr->lsp_id, ISIS_SYS_ID_LEN + 1); | |
1211 | LSP_FRAGMENT (lspid) = 0; | |
1212 | lsp0 = lsp_search (lspid, circuit->area->lspdb[level - 1]); | |
1213 | if (!lsp0) | |
1214 | { | |
529d65b3 | 1215 | zlog_debug ("Got lsp frag, while zero lsp not database"); |
f390d2c7 | 1216 | return ISIS_OK; |
1217 | } | |
1218 | } | |
1219 | lsp = | |
1220 | lsp_new_from_stream_ptr (circuit->rcv_stream, | |
1221 | ntohs (hdr->pdu_len), lsp0, | |
1222 | circuit->area); | |
1223 | lsp->level = level; | |
1224 | lsp->adj = adj; | |
1225 | lsp_insert (lsp, circuit->area->lspdb[level - 1]); | |
1226 | /* ii */ | |
1227 | ISIS_FLAGS_SET_ALL (lsp->SRMflags); | |
1228 | /* iii */ | |
1229 | ISIS_CLEAR_FLAG (lsp->SRMflags, circuit); | |
1230 | ||
1231 | /* iv */ | |
1232 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
1233 | ISIS_SET_FLAG (lsp->SSNflags, circuit); | |
1234 | /* FIXME: v) */ | |
1235 | } | |
1236 | /* 7.3.15.1 e) 2) LSP equal to the one in db */ | |
1237 | else if (comp == LSP_EQUAL) | |
1238 | { | |
1239 | ISIS_CLEAR_FLAG (lsp->SRMflags, circuit); | |
a96d8d10 | 1240 | lsp_update (lsp, hdr, circuit->rcv_stream, circuit->area, level); |
f390d2c7 | 1241 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) |
1242 | { | |
1243 | ISIS_SET_FLAG (lsp->SSNflags, circuit); | |
1244 | } | |
1245 | } | |
1246 | /* 7.3.15.1 e) 3) LSP older than the one in db */ | |
1247 | else | |
1248 | { | |
1249 | ISIS_SET_FLAG (lsp->SRMflags, circuit); | |
1250 | ISIS_CLEAR_FLAG (lsp->SSNflags, circuit); | |
1251 | } | |
eb5d44eb | 1252 | } |
eb5d44eb | 1253 | if (lsp) |
1254 | lsp->adj = adj; | |
1255 | return retval; | |
1256 | } | |
1257 | ||
1258 | /* | |
1259 | * Process Sequence Numbers | |
1260 | * ISO - 10589 | |
1261 | * Section 7.3.15.2 - Action on receipt of a sequence numbers PDU | |
1262 | */ | |
1263 | ||
92365889 | 1264 | static int |
f390d2c7 | 1265 | process_snp (int snp_type, int level, struct isis_circuit *circuit, |
1266 | u_char * ssnpa) | |
eb5d44eb | 1267 | { |
1268 | int retval = ISIS_OK; | |
1269 | int cmp, own_lsp; | |
1270 | char typechar = ' '; | |
1271 | int len; | |
1272 | struct isis_adjacency *adj; | |
1273 | struct isis_complete_seqnum_hdr *chdr = NULL; | |
1274 | struct isis_partial_seqnum_hdr *phdr = NULL; | |
1275 | uint32_t found = 0, expected = 0; | |
1276 | struct isis_lsp *lsp; | |
1277 | struct lsp_entry *entry; | |
1eb8ef25 | 1278 | struct listnode *node, *nnode; |
1279 | struct listnode *node2, *nnode2; | |
eb5d44eb | 1280 | struct tlvs tlvs; |
1281 | struct list *lsp_list = NULL; | |
1282 | struct isis_passwd *passwd; | |
1283 | ||
f390d2c7 | 1284 | if (snp_type == ISIS_SNP_CSNP_FLAG) |
1285 | { | |
1286 | /* getting the header info */ | |
1287 | typechar = 'C'; | |
1288 | chdr = | |
1289 | (struct isis_complete_seqnum_hdr *) STREAM_PNT (circuit->rcv_stream); | |
1290 | circuit->rcv_stream->getp += ISIS_CSNP_HDRLEN; | |
1291 | len = ntohs (chdr->pdu_len); | |
1292 | if (len < ISIS_CSNP_HDRLEN) | |
1293 | { | |
1294 | zlog_warn ("Received a CSNP with bogus length!"); | |
1295 | return ISIS_OK; | |
1296 | } | |
eb5d44eb | 1297 | } |
f390d2c7 | 1298 | else |
1299 | { | |
1300 | typechar = 'P'; | |
1301 | phdr = | |
1302 | (struct isis_partial_seqnum_hdr *) STREAM_PNT (circuit->rcv_stream); | |
1303 | circuit->rcv_stream->getp += ISIS_PSNP_HDRLEN; | |
1304 | len = ntohs (phdr->pdu_len); | |
1305 | if (len < ISIS_PSNP_HDRLEN) | |
1306 | { | |
1307 | zlog_warn ("Received a CSNP with bogus length!"); | |
1308 | return ISIS_OK; | |
1309 | } | |
eb5d44eb | 1310 | } |
eb5d44eb | 1311 | |
1312 | /* 7.3.15.2 a) 1 - external domain circuit will discard snp pdu */ | |
f390d2c7 | 1313 | if (circuit->ext_domain) |
1314 | { | |
eb5d44eb | 1315 | |
529d65b3 | 1316 | zlog_debug ("ISIS-Snp (%s): Rcvd L%d %cSNP on %s, " |
1317 | "skipping: circuit externalDomain = true", | |
1318 | circuit->area->area_tag, | |
1319 | level, typechar, circuit->interface->name); | |
eb5d44eb | 1320 | |
f390d2c7 | 1321 | return ISIS_OK; |
1322 | } | |
eb5d44eb | 1323 | |
1324 | /* 7.3.15.2 a) 2,3 - manualL2OnlyMode not implemented */ | |
f390d2c7 | 1325 | if (!accept_level (level, circuit->circuit_is_type)) |
1326 | { | |
eb5d44eb | 1327 | |
529d65b3 | 1328 | zlog_debug ("ISIS-Snp (%s): Rcvd L%d %cSNP on %s, " |
1329 | "skipping: circuit type %s does not match level %d", | |
1330 | circuit->area->area_tag, | |
1331 | level, | |
1332 | typechar, | |
1333 | circuit->interface->name, | |
1334 | circuit_t2string (circuit->circuit_is_type), level); | |
eb5d44eb | 1335 | |
1336 | return ISIS_OK; | |
1337 | } | |
f390d2c7 | 1338 | |
1339 | /* 7.3.15.2 a) 4 - not applicable for CSNP only PSNPs on broadcast */ | |
1340 | if ((snp_type == ISIS_SNP_PSNP_FLAG) && | |
1341 | (circuit->circ_type == CIRCUIT_T_BROADCAST)) | |
1342 | { | |
1343 | if (!circuit->u.bc.is_dr[level - 1]) | |
1344 | { | |
1345 | ||
529d65b3 | 1346 | zlog_debug ("ISIS-Snp (%s): Rcvd L%d %cSNP from %s on %s, " |
1347 | "skipping: we are not the DIS", | |
1348 | circuit->area->area_tag, | |
1349 | level, | |
1350 | typechar, snpa_print (ssnpa), circuit->interface->name); | |
f390d2c7 | 1351 | |
1352 | return ISIS_OK; | |
1353 | } | |
1354 | } | |
eb5d44eb | 1355 | |
1356 | /* 7.3.15.2 a) 5 - need to make sure IDLength matches - already checked */ | |
1357 | ||
1358 | /* 7.3.15.2 a) 6 - maximum area match, can be ommited since we only use 3 | |
1359 | * - already checked */ | |
1360 | ||
1361 | /* 7.3.15.2 a) 7 - Must check that we have an adjacency of the same level */ | |
1362 | /* for broadcast circuits, snpa should be compared */ | |
1363 | /* FIXME : Do we need to check SNPA? */ | |
f390d2c7 | 1364 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) |
1365 | { | |
1366 | if (snp_type == ISIS_SNP_CSNP_FLAG) | |
1367 | { | |
1368 | adj = | |
1369 | isis_adj_lookup (chdr->source_id, circuit->u.bc.adjdb[level - 1]); | |
1370 | } | |
1371 | else | |
1372 | { | |
1373 | /* a psnp on a broadcast, how lovely of Juniper :) */ | |
1374 | adj = | |
1375 | isis_adj_lookup (phdr->source_id, circuit->u.bc.adjdb[level - 1]); | |
1376 | } | |
1377 | if (!adj) | |
1378 | return ISIS_OK; /* Silently discard */ | |
1379 | } | |
1380 | else | |
1381 | { | |
1382 | if (!circuit->u.p2p.neighbor) | |
1383 | return ISIS_OK; /* Silently discard */ | |
1384 | } | |
eb5d44eb | 1385 | |
1386 | /* 7.3.15.2 a) 8 - Passwords for level 1 - not implemented */ | |
1387 | ||
1388 | /* 7.3.15.2 a) 9 - Passwords for level 2 - not implemented */ | |
1389 | ||
1390 | memset (&tlvs, 0, sizeof (struct tlvs)); | |
1391 | ||
1392 | /* parse the SNP */ | |
1393 | expected |= TLVFLAG_LSP_ENTRIES; | |
1394 | expected |= TLVFLAG_AUTH_INFO; | |
1395 | retval = parse_tlvs (circuit->area->area_tag, | |
f390d2c7 | 1396 | STREAM_PNT (circuit->rcv_stream), |
eb5d44eb | 1397 | len - circuit->rcv_stream->getp, |
f390d2c7 | 1398 | &expected, &found, &tlvs); |
eb5d44eb | 1399 | |
f390d2c7 | 1400 | if (retval > ISIS_WARNING) |
1401 | { | |
1402 | zlog_warn ("something went very wrong processing SNP"); | |
1403 | free_tlvs (&tlvs); | |
1404 | return retval; | |
1405 | } | |
eb5d44eb | 1406 | |
1cbc562b | 1407 | if (level == 1) |
1408 | passwd = &circuit->area->area_passwd; | |
1409 | else | |
1410 | passwd = &circuit->area->domain_passwd; | |
1411 | ||
1412 | if (CHECK_FLAG(passwd->snp_auth, SNP_AUTH_RECV)) | |
f390d2c7 | 1413 | { |
1cbc562b | 1414 | if (passwd->type) |
f390d2c7 | 1415 | { |
1cbc562b | 1416 | if (!(found & TLVFLAG_AUTH_INFO) || |
1417 | authentication_check (passwd, &tlvs.auth_info)) | |
1418 | { | |
1419 | isis_event_auth_failure (circuit->area->area_tag, | |
1420 | "SNP authentication" " failure", | |
1421 | phdr ? phdr->source_id : chdr->source_id); | |
1422 | return ISIS_OK; | |
1423 | } | |
f390d2c7 | 1424 | } |
1425 | } | |
eb5d44eb | 1426 | |
1427 | /* debug isis snp-packets */ | |
f390d2c7 | 1428 | if (isis->debugs & DEBUG_SNP_PACKETS) |
1429 | { | |
529d65b3 | 1430 | zlog_debug ("ISIS-Snp (%s): Rcvd L%d %cSNP from %s on %s", |
1431 | circuit->area->area_tag, | |
1432 | level, | |
1433 | typechar, snpa_print (ssnpa), circuit->interface->name); | |
f390d2c7 | 1434 | if (tlvs.lsp_entries) |
1435 | { | |
3fdb2dd9 | 1436 | for (ALL_LIST_ELEMENTS_RO (tlvs.lsp_entries, node, entry)) |
f390d2c7 | 1437 | { |
529d65b3 | 1438 | zlog_debug ("ISIS-Snp (%s): %cSNP entry %s, seq 0x%08x," |
1439 | " cksum 0x%04x, lifetime %us", | |
1440 | circuit->area->area_tag, | |
1441 | typechar, | |
1442 | rawlspid_print (entry->lsp_id), | |
1443 | ntohl (entry->seq_num), | |
1444 | ntohs (entry->checksum), ntohs (entry->rem_lifetime)); | |
f390d2c7 | 1445 | } |
1446 | } | |
eb5d44eb | 1447 | } |
eb5d44eb | 1448 | |
1449 | /* 7.3.15.2 b) Actions on LSP_ENTRIES reported */ | |
f390d2c7 | 1450 | if (tlvs.lsp_entries) |
1451 | { | |
3fdb2dd9 | 1452 | for (ALL_LIST_ELEMENTS_RO (tlvs.lsp_entries, node, entry)) |
f390d2c7 | 1453 | { |
1454 | lsp = lsp_search (entry->lsp_id, circuit->area->lspdb[level - 1]); | |
1455 | own_lsp = !memcmp (entry->lsp_id, isis->sysid, ISIS_SYS_ID_LEN); | |
1456 | if (lsp) | |
1457 | { | |
1458 | /* 7.3.15.2 b) 1) is this LSP newer */ | |
1459 | cmp = lsp_compare (circuit->area->area_tag, lsp, entry->seq_num, | |
1460 | entry->checksum, entry->rem_lifetime); | |
1461 | /* 7.3.15.2 b) 2) if it equals, clear SRM on p2p */ | |
1462 | if (cmp == LSP_EQUAL) | |
1463 | { | |
1464 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
1465 | ISIS_CLEAR_FLAG (lsp->SRMflags, circuit); | |
1466 | /* 7.3.15.2 b) 3) if it is older, clear SSN and set SRM */ | |
1467 | } | |
1468 | else if (cmp == LSP_OLDER) | |
1469 | { | |
1470 | ISIS_CLEAR_FLAG (lsp->SSNflags, circuit); | |
1471 | ISIS_SET_FLAG (lsp->SRMflags, circuit); | |
1472 | } | |
1473 | else | |
1474 | { | |
1475 | /* 7.3.15.2 b) 4) if it is newer, set SSN and clear SRM | |
1476 | * on p2p */ | |
1477 | if (own_lsp) | |
1478 | { | |
1479 | lsp_inc_seqnum (lsp, ntohl (entry->seq_num)); | |
1480 | ISIS_SET_FLAG (lsp->SRMflags, circuit); | |
1481 | } | |
1482 | else | |
1483 | { | |
1484 | ISIS_SET_FLAG (lsp->SSNflags, circuit); | |
1485 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
1486 | ISIS_CLEAR_FLAG (lsp->SRMflags, circuit); | |
1487 | } | |
1488 | } | |
1489 | } | |
1490 | else | |
1491 | { | |
1492 | /* 7.3.15.2 b) 5) if it was not found, and all of those are not 0, | |
1493 | * insert it and set SSN on it */ | |
1494 | if (entry->rem_lifetime && entry->checksum && entry->seq_num && | |
1495 | memcmp (entry->lsp_id, isis->sysid, ISIS_SYS_ID_LEN)) | |
1496 | { | |
1497 | lsp = lsp_new (entry->lsp_id, ntohs (entry->rem_lifetime), | |
1498 | 0, 0, entry->checksum, level); | |
1499 | lsp_insert (lsp, circuit->area->lspdb[level - 1]); | |
1500 | ISIS_SET_FLAG (lsp->SSNflags, circuit); | |
1501 | } | |
1502 | } | |
eb5d44eb | 1503 | } |
1504 | } | |
eb5d44eb | 1505 | |
1506 | /* 7.3.15.2 c) on CSNP set SRM for all in range which were not reported */ | |
f390d2c7 | 1507 | if (snp_type == ISIS_SNP_CSNP_FLAG) |
1508 | { | |
1509 | /* | |
1510 | * Build a list from our own LSP db bounded with start_ and stop_lsp_id | |
1511 | */ | |
1512 | lsp_list = list_new (); | |
1513 | lsp_build_list_nonzero_ht (chdr->start_lsp_id, chdr->stop_lsp_id, | |
1514 | lsp_list, circuit->area->lspdb[level - 1]); | |
1515 | ||
1516 | /* Fixme: Find a better solution */ | |
1517 | if (tlvs.lsp_entries) | |
1518 | { | |
1eb8ef25 | 1519 | for (ALL_LIST_ELEMENTS (tlvs.lsp_entries, node, nnode, entry)) |
f390d2c7 | 1520 | { |
1eb8ef25 | 1521 | for (ALL_LIST_ELEMENTS (lsp_list, node2, nnode2, lsp)) |
f390d2c7 | 1522 | { |
1523 | if (lsp_id_cmp (lsp->lsp_header->lsp_id, entry->lsp_id) == 0) | |
1524 | { | |
1525 | list_delete_node (lsp_list, node2); | |
1526 | break; | |
1527 | } | |
1528 | } | |
1529 | } | |
1530 | } | |
1531 | /* on remaining LSPs we set SRM (neighbor knew not of) */ | |
3fdb2dd9 | 1532 | for (ALL_LIST_ELEMENTS_RO (lsp_list, node, lsp)) |
f390d2c7 | 1533 | { |
1534 | ISIS_SET_FLAG (lsp->SRMflags, circuit); | |
eb5d44eb | 1535 | } |
f390d2c7 | 1536 | /* lets free it */ |
1537 | list_free (lsp_list); | |
eb5d44eb | 1538 | } |
eb5d44eb | 1539 | |
1540 | free_tlvs (&tlvs); | |
1541 | return retval; | |
1542 | } | |
1543 | ||
92365889 | 1544 | static int |
f390d2c7 | 1545 | process_csnp (int level, struct isis_circuit *circuit, u_char * ssnpa) |
eb5d44eb | 1546 | { |
eb5d44eb | 1547 | /* Sanity check - FIXME: move to correct place */ |
f390d2c7 | 1548 | if ((stream_get_endp (circuit->rcv_stream) - |
1549 | stream_get_getp (circuit->rcv_stream)) < ISIS_CSNP_HDRLEN) | |
1550 | { | |
1551 | zlog_warn ("Packet too short ( < %d)", ISIS_CSNP_HDRLEN); | |
1552 | return ISIS_WARNING; | |
1553 | } | |
eb5d44eb | 1554 | |
1555 | return process_snp (ISIS_SNP_CSNP_FLAG, level, circuit, ssnpa); | |
1556 | } | |
1557 | ||
92365889 | 1558 | static int |
f390d2c7 | 1559 | process_psnp (int level, struct isis_circuit *circuit, u_char * ssnpa) |
eb5d44eb | 1560 | { |
f390d2c7 | 1561 | if ((stream_get_endp (circuit->rcv_stream) - |
1562 | stream_get_getp (circuit->rcv_stream)) < ISIS_PSNP_HDRLEN) | |
1563 | { | |
1564 | zlog_warn ("Packet too short"); | |
1565 | return ISIS_WARNING; | |
1566 | } | |
eb5d44eb | 1567 | |
1568 | return process_snp (ISIS_SNP_PSNP_FLAG, level, circuit, ssnpa); | |
1569 | } | |
1570 | ||
eb5d44eb | 1571 | /* |
1572 | * Process ISH | |
1573 | * ISO - 10589 | |
1574 | * Section 8.2.2 - Receiving ISH PDUs by an intermediate system | |
1575 | * FIXME: sample packet dump, need to figure 0x81 - looks like NLPid | |
f390d2c7 | 1576 | * 0x82 0x15 0x01 0x00 0x04 0x01 0x2c 0x59 |
1577 | * 0x38 0x08 0x47 0x00 0x01 0x00 0x02 0x00 | |
1578 | * 0x03 0x00 0x81 0x01 0xcc | |
eb5d44eb | 1579 | */ |
92365889 | 1580 | static int |
eb5d44eb | 1581 | process_is_hello (struct isis_circuit *circuit) |
1582 | { | |
1583 | struct isis_adjacency *adj; | |
1584 | int retval = ISIS_OK; | |
1585 | u_char neigh_len; | |
1586 | u_char *sysid; | |
1587 | ||
1588 | /* In this point in time we are not yet able to handle is_hellos | |
1589 | * on lan - Sorry juniper... | |
1590 | */ | |
1591 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) | |
1592 | return retval; | |
1593 | ||
1594 | neigh_len = stream_getc (circuit->rcv_stream); | |
f390d2c7 | 1595 | sysid = STREAM_PNT (circuit->rcv_stream) + neigh_len - 1 - ISIS_SYS_ID_LEN; |
eb5d44eb | 1596 | adj = circuit->u.p2p.neighbor; |
f390d2c7 | 1597 | if (!adj) |
1598 | { | |
1599 | /* 8.2.2 */ | |
41b36e90 | 1600 | adj = isis_new_adj (sysid, NULL, 0, circuit); |
f390d2c7 | 1601 | if (adj == NULL) |
1602 | return ISIS_ERROR; | |
eb5d44eb | 1603 | |
f390d2c7 | 1604 | isis_adj_state_change (adj, ISIS_ADJ_INITIALIZING, NULL); |
1605 | adj->sys_type = ISIS_SYSTYPE_UNKNOWN; | |
1606 | circuit->u.p2p.neighbor = adj; | |
1607 | } | |
1608 | /* 8.2.2 a) */ | |
1609 | if ((adj->adj_state == ISIS_ADJ_UP) && memcmp (adj->sysid, sysid, | |
1610 | ISIS_SYS_ID_LEN)) | |
1611 | { | |
1612 | /* 8.2.2 a) 1) FIXME: adjStateChange(down) event */ | |
1613 | /* 8.2.2 a) 2) delete the adj */ | |
1614 | XFREE (MTYPE_ISIS_ADJACENCY, adj); | |
1615 | /* 8.2.2 a) 3) create a new adj */ | |
41b36e90 | 1616 | adj = isis_new_adj (sysid, NULL, 0, circuit); |
f390d2c7 | 1617 | if (adj == NULL) |
1618 | return ISIS_ERROR; | |
1619 | ||
1620 | /* 8.2.2 a) 3) i */ | |
1621 | isis_adj_state_change (adj, ISIS_ADJ_INITIALIZING, NULL); | |
1622 | /* 8.2.2 a) 3) ii */ | |
1623 | adj->sys_type = ISIS_SYSTYPE_UNKNOWN; | |
1624 | /* 8.2.2 a) 4) quite meaningless */ | |
1625 | } | |
eb5d44eb | 1626 | /* 8.2.2 b) ignore on condition */ |
f390d2c7 | 1627 | if ((adj->adj_state == ISIS_ADJ_INITIALIZING) && |
1628 | (adj->sys_type == ISIS_SYSTYPE_IS)) | |
1629 | { | |
1630 | /* do nothing */ | |
1631 | } | |
1632 | else | |
1633 | { | |
1634 | /* 8.2.2 c) respond with a p2p IIH */ | |
1635 | send_hello (circuit, 1); | |
1636 | } | |
eb5d44eb | 1637 | /* 8.2.2 d) type is IS */ |
f390d2c7 | 1638 | adj->sys_type = ISIS_SYSTYPE_IS; |
eb5d44eb | 1639 | /* 8.2.2 e) FIXME: Circuit type of? */ |
1640 | ||
eb5d44eb | 1641 | return retval; |
1642 | } | |
1643 | ||
eb5d44eb | 1644 | /* |
1645 | * PDU Dispatcher | |
1646 | */ | |
1647 | ||
92365889 | 1648 | static int |
f390d2c7 | 1649 | isis_handle_pdu (struct isis_circuit *circuit, u_char * ssnpa) |
eb5d44eb | 1650 | { |
eb5d44eb | 1651 | struct isis_fixed_hdr *hdr; |
1652 | struct esis_fixed_hdr *esis_hdr; | |
1653 | ||
f390d2c7 | 1654 | int retval = ISIS_OK; |
eb5d44eb | 1655 | |
1656 | /* | |
1657 | * Let's first read data from stream to the header | |
1658 | */ | |
f390d2c7 | 1659 | hdr = (struct isis_fixed_hdr *) STREAM_DATA (circuit->rcv_stream); |
eb5d44eb | 1660 | |
f390d2c7 | 1661 | if ((hdr->idrp != ISO10589_ISIS) && (hdr->idrp != ISO9542_ESIS)) |
1662 | { | |
1663 | zlog_warn ("Not an IS-IS or ES-IS packet IDRP=%02x", hdr->idrp); | |
1664 | return ISIS_ERROR; | |
1665 | } | |
eb5d44eb | 1666 | |
1667 | /* now we need to know if this is an ISO 9542 packet and | |
1668 | * take real good care of it, waaa! | |
1669 | */ | |
f390d2c7 | 1670 | if (hdr->idrp == ISO9542_ESIS) |
1671 | { | |
1672 | esis_hdr = (struct esis_fixed_hdr *) STREAM_DATA (circuit->rcv_stream); | |
1673 | stream_set_getp (circuit->rcv_stream, ESIS_FIXED_HDR_LEN); | |
1674 | /* FIXME: Need to do some acceptence tests */ | |
1675 | /* example length... */ | |
1676 | switch (esis_hdr->pdu_type) | |
1677 | { | |
1678 | case ESH_PDU: | |
1679 | /* FIXME */ | |
1680 | break; | |
1681 | case ISH_PDU: | |
529d65b3 | 1682 | zlog_debug ("AN ISH PDU!!"); |
f390d2c7 | 1683 | retval = process_is_hello (circuit); |
1684 | break; | |
1685 | default: | |
1686 | return ISIS_ERROR; | |
1687 | } | |
1688 | return retval; | |
1689 | } | |
1690 | else | |
1691 | { | |
1692 | stream_set_getp (circuit->rcv_stream, ISIS_FIXED_HDR_LEN); | |
1693 | } | |
eb5d44eb | 1694 | /* |
1695 | * and then process it | |
1696 | */ | |
1697 | ||
f390d2c7 | 1698 | if (hdr->length < ISIS_MINIMUM_FIXED_HDR_LEN) |
1699 | { | |
1700 | zlog_err ("Fixed header length = %d", hdr->length); | |
1701 | return ISIS_ERROR; | |
1702 | } | |
eb5d44eb | 1703 | |
f390d2c7 | 1704 | if (hdr->version1 != 1) |
1705 | { | |
1706 | zlog_warn ("Unsupported ISIS version %u", hdr->version1); | |
1707 | return ISIS_WARNING; | |
1708 | } | |
eb5d44eb | 1709 | /* either 6 or 0 */ |
f390d2c7 | 1710 | if ((hdr->id_len != 0) && (hdr->id_len != ISIS_SYS_ID_LEN)) |
1711 | { | |
1712 | zlog_err | |
1713 | ("IDFieldLengthMismatch: ID Length field in a received PDU %u, " | |
1714 | "while the parameter for this IS is %u", hdr->id_len, | |
1715 | ISIS_SYS_ID_LEN); | |
1716 | return ISIS_ERROR; | |
1717 | } | |
eb5d44eb | 1718 | |
f390d2c7 | 1719 | if (hdr->version2 != 1) |
1720 | { | |
1721 | zlog_warn ("Unsupported ISIS version %u", hdr->version2); | |
1722 | return ISIS_WARNING; | |
1723 | } | |
eb5d44eb | 1724 | /* either 3 or 0 */ |
f390d2c7 | 1725 | if ((hdr->max_area_addrs != 0) |
1726 | && (hdr->max_area_addrs != isis->max_area_addrs)) | |
1727 | { | |
1728 | zlog_err ("maximumAreaAddressesMismatch: maximumAreaAdresses in a " | |
1729 | "received PDU %u while the parameter for this IS is %u", | |
1730 | hdr->max_area_addrs, isis->max_area_addrs); | |
1731 | return ISIS_ERROR; | |
1732 | } | |
eb5d44eb | 1733 | |
f390d2c7 | 1734 | switch (hdr->pdu_type) |
1735 | { | |
1736 | case L1_LAN_HELLO: | |
1737 | retval = process_lan_hello (ISIS_LEVEL1, circuit, ssnpa); | |
1738 | break; | |
1739 | case L2_LAN_HELLO: | |
1740 | retval = process_lan_hello (ISIS_LEVEL2, circuit, ssnpa); | |
1741 | break; | |
1742 | case P2P_HELLO: | |
1743 | retval = process_p2p_hello (circuit); | |
1744 | break; | |
1745 | case L1_LINK_STATE: | |
1746 | retval = process_lsp (ISIS_LEVEL1, circuit, ssnpa); | |
1747 | break; | |
1748 | case L2_LINK_STATE: | |
1749 | retval = process_lsp (ISIS_LEVEL2, circuit, ssnpa); | |
1750 | break; | |
1751 | case L1_COMPLETE_SEQ_NUM: | |
1752 | retval = process_csnp (ISIS_LEVEL1, circuit, ssnpa); | |
1753 | break; | |
1754 | case L2_COMPLETE_SEQ_NUM: | |
1755 | retval = process_csnp (ISIS_LEVEL2, circuit, ssnpa); | |
1756 | break; | |
1757 | case L1_PARTIAL_SEQ_NUM: | |
1758 | retval = process_psnp (ISIS_LEVEL1, circuit, ssnpa); | |
1759 | break; | |
1760 | case L2_PARTIAL_SEQ_NUM: | |
1761 | retval = process_psnp (ISIS_LEVEL2, circuit, ssnpa); | |
1762 | break; | |
1763 | default: | |
1764 | return ISIS_ERROR; | |
1765 | } | |
eb5d44eb | 1766 | |
1767 | return retval; | |
1768 | } | |
1769 | ||
eb5d44eb | 1770 | #ifdef GNU_LINUX |
1771 | int | |
1772 | isis_receive (struct thread *thread) | |
1773 | { | |
eb5d44eb | 1774 | struct isis_circuit *circuit; |
1775 | u_char ssnpa[ETH_ALEN]; | |
1776 | int retval; | |
1777 | ||
1778 | /* | |
1779 | * Get the circuit | |
1780 | */ | |
1781 | circuit = THREAD_ARG (thread); | |
1782 | assert (circuit); | |
1783 | ||
1784 | if (circuit->rcv_stream == NULL) | |
f390d2c7 | 1785 | circuit->rcv_stream = stream_new (ISO_MTU (circuit)); |
eb5d44eb | 1786 | else |
1787 | stream_reset (circuit->rcv_stream); | |
1788 | ||
1789 | retval = circuit->rx (circuit, ssnpa); | |
f390d2c7 | 1790 | circuit->t_read = NULL; |
eb5d44eb | 1791 | |
1792 | if (retval == ISIS_OK) | |
1793 | retval = isis_handle_pdu (circuit, ssnpa); | |
1794 | ||
1795 | /* | |
1796 | * prepare for next packet. | |
1797 | */ | |
f390d2c7 | 1798 | THREAD_READ_ON (master, circuit->t_read, isis_receive, circuit, |
1799 | circuit->fd); | |
eb5d44eb | 1800 | |
1801 | return retval; | |
1802 | } | |
1803 | ||
1804 | #else | |
1805 | int | |
1806 | isis_receive (struct thread *thread) | |
1807 | { | |
eb5d44eb | 1808 | struct isis_circuit *circuit; |
1809 | u_char ssnpa[ETH_ALEN]; | |
1810 | int retval; | |
1811 | ||
1812 | /* | |
1813 | * Get the circuit | |
1814 | */ | |
1815 | circuit = THREAD_ARG (thread); | |
1816 | assert (circuit); | |
1817 | ||
f390d2c7 | 1818 | circuit->t_read = NULL; |
eb5d44eb | 1819 | |
1820 | if (circuit->rcv_stream == NULL) | |
f390d2c7 | 1821 | circuit->rcv_stream = stream_new (ISO_MTU (circuit)); |
eb5d44eb | 1822 | else |
1823 | stream_reset (circuit->rcv_stream); | |
1824 | ||
1825 | retval = circuit->rx (circuit, ssnpa); | |
1826 | ||
1827 | if (retval == ISIS_OK) | |
1828 | retval = isis_handle_pdu (circuit, ssnpa); | |
1829 | ||
1830 | /* | |
1831 | * prepare for next packet. | |
1832 | */ | |
f390d2c7 | 1833 | circuit->t_read = thread_add_timer_msec (master, isis_receive, circuit, |
1834 | listcount | |
1835 | (circuit->area->circuit_list) * | |
1836 | 100); | |
eb5d44eb | 1837 | |
1838 | return retval; | |
1839 | } | |
1840 | ||
1841 | #endif | |
1842 | ||
1843 | /* filling of the fixed isis header */ | |
1844 | void | |
1845 | fill_fixed_hdr (struct isis_fixed_hdr *hdr, u_char pdu_type) | |
1846 | { | |
1847 | memset (hdr, 0, sizeof (struct isis_fixed_hdr)); | |
1848 | ||
1849 | hdr->idrp = ISO10589_ISIS; | |
1850 | ||
f390d2c7 | 1851 | switch (pdu_type) |
1852 | { | |
1853 | case L1_LAN_HELLO: | |
1854 | case L2_LAN_HELLO: | |
1855 | hdr->length = ISIS_LANHELLO_HDRLEN; | |
1856 | break; | |
1857 | case P2P_HELLO: | |
1858 | hdr->length = ISIS_P2PHELLO_HDRLEN; | |
1859 | break; | |
1860 | case L1_LINK_STATE: | |
1861 | case L2_LINK_STATE: | |
1862 | hdr->length = ISIS_LSP_HDR_LEN; | |
1863 | break; | |
1864 | case L1_COMPLETE_SEQ_NUM: | |
1865 | case L2_COMPLETE_SEQ_NUM: | |
1866 | hdr->length = ISIS_CSNP_HDRLEN; | |
1867 | break; | |
1868 | case L1_PARTIAL_SEQ_NUM: | |
1869 | case L2_PARTIAL_SEQ_NUM: | |
1870 | hdr->length = ISIS_PSNP_HDRLEN; | |
1871 | break; | |
1872 | default: | |
1873 | zlog_warn ("fill_fixed_hdr(): unknown pdu type %d", pdu_type); | |
1874 | return; | |
1875 | } | |
eb5d44eb | 1876 | hdr->length += ISIS_FIXED_HDR_LEN; |
1877 | hdr->pdu_type = pdu_type; | |
1878 | hdr->version1 = 1; | |
f390d2c7 | 1879 | hdr->id_len = 0; /* ISIS_SYS_ID_LEN - 0==6 */ |
eb5d44eb | 1880 | hdr->version2 = 1; |
f390d2c7 | 1881 | hdr->max_area_addrs = 0; /* isis->max_area_addrs - 0==3 */ |
eb5d44eb | 1882 | } |
1883 | ||
eb5d44eb | 1884 | /* |
1885 | * SEND SIDE | |
1886 | */ | |
92365889 | 1887 | static void |
eb5d44eb | 1888 | fill_fixed_hdr_andstream (struct isis_fixed_hdr *hdr, u_char pdu_type, |
f390d2c7 | 1889 | struct stream *stream) |
eb5d44eb | 1890 | { |
f390d2c7 | 1891 | fill_fixed_hdr (hdr, pdu_type); |
eb5d44eb | 1892 | |
1893 | stream_putc (stream, hdr->idrp); | |
1894 | stream_putc (stream, hdr->length); | |
1895 | stream_putc (stream, hdr->version1); | |
1896 | stream_putc (stream, hdr->id_len); | |
1897 | stream_putc (stream, hdr->pdu_type); | |
1898 | stream_putc (stream, hdr->version2); | |
1899 | stream_putc (stream, hdr->reserved); | |
1900 | stream_putc (stream, hdr->max_area_addrs); | |
1901 | ||
1902 | return; | |
1903 | } | |
1904 | ||
eb5d44eb | 1905 | int |
1906 | send_hello (struct isis_circuit *circuit, int level) | |
1907 | { | |
1908 | struct isis_fixed_hdr fixed_hdr; | |
1909 | struct isis_lan_hello_hdr hello_hdr; | |
1910 | struct isis_p2p_hello_hdr p2p_hello_hdr; | |
1911 | ||
1912 | u_int32_t interval; | |
1913 | unsigned long len_pointer, length; | |
1914 | int retval; | |
1915 | ||
f390d2c7 | 1916 | if (circuit->interface->mtu == 0) |
1917 | { | |
1918 | zlog_warn ("circuit has zero MTU"); | |
1919 | return ISIS_WARNING; | |
1920 | } | |
eb5d44eb | 1921 | |
1922 | if (!circuit->snd_stream) | |
f390d2c7 | 1923 | circuit->snd_stream = stream_new (ISO_MTU (circuit)); |
eb5d44eb | 1924 | else |
1925 | stream_reset (circuit->snd_stream); | |
1926 | ||
1927 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) | |
1928 | if (level == 1) | |
f390d2c7 | 1929 | fill_fixed_hdr_andstream (&fixed_hdr, L1_LAN_HELLO, |
1930 | circuit->snd_stream); | |
eb5d44eb | 1931 | else |
f390d2c7 | 1932 | fill_fixed_hdr_andstream (&fixed_hdr, L2_LAN_HELLO, |
1933 | circuit->snd_stream); | |
eb5d44eb | 1934 | else |
f390d2c7 | 1935 | fill_fixed_hdr_andstream (&fixed_hdr, P2P_HELLO, circuit->snd_stream); |
eb5d44eb | 1936 | |
1937 | /* | |
1938 | * Fill LAN Level 1 or 2 Hello PDU header | |
1939 | */ | |
1940 | memset (&hello_hdr, 0, sizeof (struct isis_lan_hello_hdr)); | |
f390d2c7 | 1941 | interval = circuit->hello_multiplier[level - 1] * |
eb5d44eb | 1942 | circuit->hello_interval[level - 1]; |
1943 | if (interval > USHRT_MAX) | |
1944 | interval = USHRT_MAX; | |
1945 | hello_hdr.circuit_t = circuit->circuit_is_type; | |
1946 | memcpy (hello_hdr.source_id, isis->sysid, ISIS_SYS_ID_LEN); | |
f390d2c7 | 1947 | hello_hdr.hold_time = htons ((u_int16_t) interval); |
eb5d44eb | 1948 | |
f390d2c7 | 1949 | hello_hdr.pdu_len = 0; /* Update the PDU Length later */ |
9985f83c | 1950 | len_pointer = stream_get_endp (circuit->snd_stream) + 3 + ISIS_SYS_ID_LEN; |
eb5d44eb | 1951 | |
1952 | /* copy the shared part of the hello to the p2p hello if needed */ | |
f390d2c7 | 1953 | if (circuit->circ_type == CIRCUIT_T_P2P) |
1954 | { | |
1955 | memcpy (&p2p_hello_hdr, &hello_hdr, 5 + ISIS_SYS_ID_LEN); | |
1956 | p2p_hello_hdr.local_id = circuit->circuit_id; | |
1957 | /* FIXME: need better understanding */ | |
1958 | stream_put (circuit->snd_stream, &p2p_hello_hdr, ISIS_P2PHELLO_HDRLEN); | |
1959 | } | |
1960 | else | |
1961 | { | |
1962 | hello_hdr.prio = circuit->u.bc.priority[level - 1]; | |
1963 | if (level == 1 && circuit->u.bc.l1_desig_is) | |
1964 | { | |
1965 | memcpy (hello_hdr.lan_id, circuit->u.bc.l1_desig_is, | |
1966 | ISIS_SYS_ID_LEN + 1); | |
1967 | } | |
1968 | else if (level == 2 && circuit->u.bc.l2_desig_is) | |
1969 | { | |
1970 | memcpy (hello_hdr.lan_id, circuit->u.bc.l2_desig_is, | |
1971 | ISIS_SYS_ID_LEN + 1); | |
1972 | } | |
1973 | stream_put (circuit->snd_stream, &hello_hdr, ISIS_LANHELLO_HDRLEN); | |
1974 | } | |
eb5d44eb | 1975 | |
1976 | /* | |
1977 | * Then the variable length part | |
1978 | */ | |
1979 | /* add circuit password */ | |
1980 | if (circuit->passwd.type) | |
1981 | if (tlv_add_authinfo (circuit->passwd.type, circuit->passwd.len, | |
1982 | circuit->passwd.passwd, circuit->snd_stream)) | |
1983 | return ISIS_WARNING; | |
1984 | /* Area Addresses TLV */ | |
1985 | assert (circuit->area); | |
1986 | if (circuit->area->area_addrs && circuit->area->area_addrs->count > 0) | |
1987 | if (tlv_add_area_addrs (circuit->area->area_addrs, circuit->snd_stream)) | |
1988 | return ISIS_WARNING; | |
1989 | ||
1990 | /* LAN Neighbors TLV */ | |
f390d2c7 | 1991 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) |
1992 | { | |
1993 | if (level == 1 && circuit->u.bc.lan_neighs[0]->count > 0) | |
1994 | if (tlv_add_lan_neighs (circuit->u.bc.lan_neighs[0], | |
1995 | circuit->snd_stream)) | |
1996 | return ISIS_WARNING; | |
1997 | if (level == 2 && circuit->u.bc.lan_neighs[1]->count > 0) | |
1998 | if (tlv_add_lan_neighs (circuit->u.bc.lan_neighs[1], | |
1999 | circuit->snd_stream)) | |
2000 | return ISIS_WARNING; | |
2001 | } | |
eb5d44eb | 2002 | |
2003 | /* Protocols Supported TLV */ | |
f390d2c7 | 2004 | if (circuit->nlpids.count > 0) |
eb5d44eb | 2005 | if (tlv_add_nlpid (&circuit->nlpids, circuit->snd_stream)) |
2006 | return ISIS_WARNING; | |
2007 | /* IP interface Address TLV */ | |
2008 | if (circuit->ip_router && circuit->ip_addrs && circuit->ip_addrs->count > 0) | |
2009 | if (tlv_add_ip_addrs (circuit->ip_addrs, circuit->snd_stream)) | |
2010 | return ISIS_WARNING; | |
2011 | ||
f390d2c7 | 2012 | #ifdef HAVE_IPV6 |
eb5d44eb | 2013 | /* IPv6 Interface Address TLV */ |
f390d2c7 | 2014 | if (circuit->ipv6_router && circuit->ipv6_link && |
eb5d44eb | 2015 | circuit->ipv6_link->count > 0) |
2016 | if (tlv_add_ipv6_addrs (circuit->ipv6_link, circuit->snd_stream)) | |
2017 | return ISIS_WARNING; | |
2018 | #endif /* HAVE_IPV6 */ | |
2019 | ||
2020 | if (circuit->u.bc.pad_hellos) | |
2021 | if (tlv_add_padding (circuit->snd_stream)) | |
2022 | return ISIS_WARNING; | |
2023 | ||
9985f83c | 2024 | length = stream_get_endp (circuit->snd_stream); |
eb5d44eb | 2025 | /* Update PDU length */ |
f390d2c7 | 2026 | stream_putw_at (circuit->snd_stream, len_pointer, (u_int16_t) length); |
eb5d44eb | 2027 | |
2028 | retval = circuit->tx (circuit, level); | |
2029 | if (retval) | |
2030 | zlog_warn ("sending of LAN Level %d Hello failed", level); | |
2031 | ||
2032 | /* DEBUG_ADJ_PACKETS */ | |
f390d2c7 | 2033 | if (isis->debugs & DEBUG_ADJ_PACKETS) |
2034 | { | |
2035 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) | |
2036 | { | |
529d65b3 | 2037 | zlog_debug ("ISIS-Adj (%s): Sent L%d LAN IIH on %s, length %ld", |
2038 | circuit->area->area_tag, level, circuit->interface->name, | |
29e50b23 | 2039 | /* FIXME: use %z when we stop supporting old compilers. */ |
2040 | (unsigned long) STREAM_SIZE (circuit->snd_stream)); | |
f390d2c7 | 2041 | } |
2042 | else | |
2043 | { | |
529d65b3 | 2044 | zlog_debug ("ISIS-Adj (%s): Sent P2P IIH on %s, length %ld", |
2045 | circuit->area->area_tag, circuit->interface->name, | |
29e50b23 | 2046 | /* FIXME: use %z when we stop supporting old compilers. */ |
2047 | (unsigned long) STREAM_SIZE (circuit->snd_stream)); | |
f390d2c7 | 2048 | } |
eb5d44eb | 2049 | } |
eb5d44eb | 2050 | |
2051 | return retval; | |
2052 | } | |
2053 | ||
92365889 | 2054 | static int |
eb5d44eb | 2055 | send_lan_hello (struct isis_circuit *circuit, int level) |
2056 | { | |
f390d2c7 | 2057 | return send_hello (circuit, level); |
eb5d44eb | 2058 | } |
2059 | ||
2060 | int | |
2061 | send_lan_l1_hello (struct thread *thread) | |
2062 | { | |
eb5d44eb | 2063 | struct isis_circuit *circuit; |
2064 | int retval; | |
2065 | ||
2066 | circuit = THREAD_ARG (thread); | |
2067 | assert (circuit); | |
2068 | circuit->u.bc.t_send_lan_hello[0] = NULL; | |
2069 | ||
2070 | if (circuit->u.bc.run_dr_elect[0]) | |
f390d2c7 | 2071 | retval = isis_dr_elect (circuit, 1); |
eb5d44eb | 2072 | |
2073 | retval = send_lan_hello (circuit, 1); | |
2074 | ||
2075 | /* set next timer thread */ | |
f390d2c7 | 2076 | THREAD_TIMER_ON (master, circuit->u.bc.t_send_lan_hello[0], |
2077 | send_lan_l1_hello, circuit, | |
2078 | isis_jitter (circuit->hello_interval[0], IIH_JITTER)); | |
eb5d44eb | 2079 | |
2080 | return retval; | |
2081 | } | |
2082 | ||
2083 | int | |
2084 | send_lan_l2_hello (struct thread *thread) | |
2085 | { | |
2086 | struct isis_circuit *circuit; | |
2087 | int retval; | |
2088 | ||
2089 | circuit = THREAD_ARG (thread); | |
2090 | assert (circuit); | |
2091 | circuit->u.bc.t_send_lan_hello[1] = NULL; | |
2092 | ||
2093 | if (circuit->u.bc.run_dr_elect[1]) | |
2094 | retval = isis_dr_elect (circuit, 2); | |
2095 | ||
2096 | retval = send_lan_hello (circuit, 2); | |
2097 | ||
f390d2c7 | 2098 | /* set next timer thread */ |
2099 | THREAD_TIMER_ON (master, circuit->u.bc.t_send_lan_hello[1], | |
2100 | send_lan_l2_hello, circuit, | |
2101 | isis_jitter (circuit->hello_interval[1], IIH_JITTER)); | |
eb5d44eb | 2102 | |
2103 | return retval; | |
2104 | } | |
2105 | ||
2106 | int | |
2107 | send_p2p_hello (struct thread *thread) | |
2108 | { | |
2109 | struct isis_circuit *circuit; | |
2110 | ||
2111 | circuit = THREAD_ARG (thread); | |
2112 | assert (circuit); | |
2113 | circuit->u.p2p.t_send_p2p_hello = NULL; | |
2114 | ||
f390d2c7 | 2115 | send_hello (circuit, 1); |
eb5d44eb | 2116 | |
f390d2c7 | 2117 | /* set next timer thread */ |
2118 | THREAD_TIMER_ON (master, circuit->u.p2p.t_send_p2p_hello, send_p2p_hello, | |
2119 | circuit, isis_jitter (circuit->hello_interval[1], | |
2120 | IIH_JITTER)); | |
eb5d44eb | 2121 | |
2122 | return ISIS_OK; | |
2123 | } | |
2124 | ||
92365889 | 2125 | static int |
f390d2c7 | 2126 | build_csnp (int level, u_char * start, u_char * stop, struct list *lsps, |
2127 | struct isis_circuit *circuit) | |
eb5d44eb | 2128 | { |
2129 | struct isis_fixed_hdr fixed_hdr; | |
2130 | struct isis_passwd *passwd; | |
2131 | int retval = ISIS_OK; | |
2132 | unsigned long lenp; | |
2133 | u_int16_t length; | |
2134 | ||
f390d2c7 | 2135 | if (level == 1) |
2136 | fill_fixed_hdr_andstream (&fixed_hdr, L1_COMPLETE_SEQ_NUM, | |
2137 | circuit->snd_stream); | |
eb5d44eb | 2138 | else |
f390d2c7 | 2139 | fill_fixed_hdr_andstream (&fixed_hdr, L2_COMPLETE_SEQ_NUM, |
2140 | circuit->snd_stream); | |
eb5d44eb | 2141 | |
2142 | /* | |
2143 | * Fill Level 1 or 2 Complete Sequence Numbers header | |
2144 | */ | |
2145 | ||
9985f83c | 2146 | lenp = stream_get_endp (circuit->snd_stream); |
f390d2c7 | 2147 | stream_putw (circuit->snd_stream, 0); /* PDU length - when we know it */ |
eb5d44eb | 2148 | /* no need to send the source here, it is always us if we csnp */ |
2149 | stream_put (circuit->snd_stream, isis->sysid, ISIS_SYS_ID_LEN); | |
2150 | /* with zero circuit id - ref 9.10, 9.11 */ | |
2151 | stream_putc (circuit->snd_stream, 0x00); | |
2152 | ||
2153 | stream_put (circuit->snd_stream, start, ISIS_SYS_ID_LEN + 2); | |
2154 | stream_put (circuit->snd_stream, stop, ISIS_SYS_ID_LEN + 2); | |
2155 | ||
2156 | /* | |
2157 | * And TLVs | |
2158 | */ | |
2159 | if (level == 1) | |
2160 | passwd = &circuit->area->area_passwd; | |
2161 | else | |
2162 | passwd = &circuit->area->domain_passwd; | |
2163 | ||
1cbc562b | 2164 | if (CHECK_FLAG(passwd->snp_auth, SNP_AUTH_SEND)) |
2165 | if (passwd->type) | |
2166 | retval = tlv_add_authinfo (passwd->type, passwd->len, | |
2167 | passwd->passwd, circuit->snd_stream); | |
eb5d44eb | 2168 | |
f390d2c7 | 2169 | if (!retval && lsps) |
2170 | { | |
2171 | retval = tlv_add_lsp_entries (lsps, circuit->snd_stream); | |
2172 | } | |
9985f83c | 2173 | length = (u_int16_t) stream_get_endp (circuit->snd_stream); |
eb5d44eb | 2174 | assert (length >= ISIS_CSNP_HDRLEN); |
2175 | /* Update PU length */ | |
2176 | stream_putw_at (circuit->snd_stream, lenp, length); | |
2177 | ||
2178 | return retval; | |
2179 | } | |
2180 | ||
2181 | /* | |
2182 | * FIXME: support multiple CSNPs | |
2183 | */ | |
2184 | ||
2185 | int | |
2186 | send_csnp (struct isis_circuit *circuit, int level) | |
2187 | { | |
2188 | int retval = ISIS_OK; | |
2189 | u_char start[ISIS_SYS_ID_LEN + 2]; | |
2190 | u_char stop[ISIS_SYS_ID_LEN + 2]; | |
2191 | struct list *list = NULL; | |
3fdb2dd9 | 2192 | struct listnode *node; |
eb5d44eb | 2193 | struct isis_lsp *lsp; |
2194 | ||
f390d2c7 | 2195 | memset (start, 0x00, ISIS_SYS_ID_LEN + 2); |
eb5d44eb | 2196 | memset (stop, 0xff, ISIS_SYS_ID_LEN + 2); |
2197 | ||
f390d2c7 | 2198 | if (circuit->area->lspdb[level - 1] && |
2199 | dict_count (circuit->area->lspdb[level - 1]) > 0) | |
2200 | { | |
2201 | list = list_new (); | |
2202 | lsp_build_list (start, stop, list, circuit->area->lspdb[level - 1]); | |
2203 | ||
2204 | if (circuit->snd_stream == NULL) | |
2205 | circuit->snd_stream = stream_new (ISO_MTU (circuit)); | |
2206 | else | |
2207 | stream_reset (circuit->snd_stream); | |
2208 | ||
2209 | retval = build_csnp (level, start, stop, list, circuit); | |
2210 | ||
2211 | if (isis->debugs & DEBUG_SNP_PACKETS) | |
2212 | { | |
529d65b3 | 2213 | zlog_debug ("ISIS-Snp (%s): Sent L%d CSNP on %s, length %ld", |
1eb8ef25 | 2214 | circuit->area->area_tag, level, circuit->interface->name, |
29e50b23 | 2215 | /* FIXME: use %z when we stop supporting old compilers. */ |
2216 | (unsigned long) STREAM_SIZE (circuit->snd_stream)); | |
3fdb2dd9 | 2217 | for (ALL_LIST_ELEMENTS_RO (list, node, lsp)) |
f390d2c7 | 2218 | { |
529d65b3 | 2219 | zlog_debug ("ISIS-Snp (%s): CSNP entry %s, seq 0x%08x," |
2220 | " cksum 0x%04x, lifetime %us", | |
2221 | circuit->area->area_tag, | |
2222 | rawlspid_print (lsp->lsp_header->lsp_id), | |
2223 | ntohl (lsp->lsp_header->seq_num), | |
2224 | ntohs (lsp->lsp_header->checksum), | |
2225 | ntohs (lsp->lsp_header->rem_lifetime)); | |
f390d2c7 | 2226 | } |
2227 | } | |
eb5d44eb | 2228 | |
f390d2c7 | 2229 | list_delete (list); |
eb5d44eb | 2230 | |
f390d2c7 | 2231 | if (retval == ISIS_OK) |
2232 | retval = circuit->tx (circuit, level); | |
2233 | } | |
eb5d44eb | 2234 | return retval; |
2235 | } | |
2236 | ||
2237 | int | |
2238 | send_l1_csnp (struct thread *thread) | |
2239 | { | |
2240 | struct isis_circuit *circuit; | |
2241 | int retval = ISIS_OK; | |
2242 | ||
2243 | circuit = THREAD_ARG (thread); | |
2244 | assert (circuit); | |
2245 | ||
2246 | circuit->t_send_csnp[0] = NULL; | |
2247 | ||
f390d2c7 | 2248 | if (circuit->circ_type == CIRCUIT_T_BROADCAST && circuit->u.bc.is_dr[0]) |
2249 | { | |
2250 | send_csnp (circuit, 1); | |
2251 | } | |
eb5d44eb | 2252 | /* set next timer thread */ |
f390d2c7 | 2253 | THREAD_TIMER_ON (master, circuit->t_send_csnp[0], send_l1_csnp, circuit, |
2254 | isis_jitter (circuit->csnp_interval[0], CSNP_JITTER)); | |
eb5d44eb | 2255 | |
2256 | return retval; | |
2257 | } | |
2258 | ||
2259 | int | |
2260 | send_l2_csnp (struct thread *thread) | |
2261 | { | |
2262 | struct isis_circuit *circuit; | |
2263 | int retval = ISIS_OK; | |
2264 | ||
2265 | circuit = THREAD_ARG (thread); | |
2266 | assert (circuit); | |
2267 | ||
2268 | circuit->t_send_csnp[1] = NULL; | |
2269 | ||
f390d2c7 | 2270 | if (circuit->circ_type == CIRCUIT_T_BROADCAST && circuit->u.bc.is_dr[1]) |
2271 | { | |
2272 | send_csnp (circuit, 2); | |
2273 | } | |
eb5d44eb | 2274 | /* set next timer thread */ |
f390d2c7 | 2275 | THREAD_TIMER_ON (master, circuit->t_send_csnp[1], send_l2_csnp, circuit, |
2276 | isis_jitter (circuit->csnp_interval[1], CSNP_JITTER)); | |
d70f99e1 | 2277 | |
eb5d44eb | 2278 | return retval; |
2279 | } | |
2280 | ||
92365889 | 2281 | static int |
eb5d44eb | 2282 | build_psnp (int level, struct isis_circuit *circuit, struct list *lsps) |
2283 | { | |
2284 | struct isis_fixed_hdr fixed_hdr; | |
2285 | unsigned long lenp; | |
2286 | u_int16_t length; | |
2287 | int retval = 0; | |
2288 | struct isis_lsp *lsp; | |
2289 | struct isis_passwd *passwd; | |
3fdb2dd9 | 2290 | struct listnode *node; |
eb5d44eb | 2291 | |
2292 | if (level == 1) | |
f390d2c7 | 2293 | fill_fixed_hdr_andstream (&fixed_hdr, L1_PARTIAL_SEQ_NUM, |
2294 | circuit->snd_stream); | |
eb5d44eb | 2295 | else |
2296 | fill_fixed_hdr_andstream (&fixed_hdr, L2_PARTIAL_SEQ_NUM, | |
f390d2c7 | 2297 | circuit->snd_stream); |
eb5d44eb | 2298 | |
2299 | /* | |
2300 | * Fill Level 1 or 2 Partial Sequence Numbers header | |
2301 | */ | |
9985f83c | 2302 | lenp = stream_get_endp (circuit->snd_stream); |
f390d2c7 | 2303 | stream_putw (circuit->snd_stream, 0); /* PDU length - when we know it */ |
eb5d44eb | 2304 | stream_put (circuit->snd_stream, isis->sysid, ISIS_SYS_ID_LEN); |
2305 | stream_putc (circuit->snd_stream, circuit->idx); | |
2306 | ||
2307 | /* | |
2308 | * And TLVs | |
2309 | */ | |
2310 | ||
2311 | if (level == 1) | |
2312 | passwd = &circuit->area->area_passwd; | |
2313 | else | |
2314 | passwd = &circuit->area->domain_passwd; | |
2315 | ||
1cbc562b | 2316 | if (CHECK_FLAG(passwd->snp_auth, SNP_AUTH_SEND)) |
2317 | if (passwd->type) | |
2318 | retval = tlv_add_authinfo (passwd->type, passwd->len, | |
2319 | passwd->passwd, circuit->snd_stream); | |
eb5d44eb | 2320 | |
f390d2c7 | 2321 | if (!retval && lsps) |
2322 | { | |
2323 | retval = tlv_add_lsp_entries (lsps, circuit->snd_stream); | |
2324 | } | |
eb5d44eb | 2325 | |
f390d2c7 | 2326 | if (isis->debugs & DEBUG_SNP_PACKETS) |
2327 | { | |
3fdb2dd9 | 2328 | for (ALL_LIST_ELEMENTS_RO (lsps, node, lsp)) |
f390d2c7 | 2329 | { |
529d65b3 | 2330 | zlog_debug ("ISIS-Snp (%s): PSNP entry %s, seq 0x%08x," |
2331 | " cksum 0x%04x, lifetime %us", | |
2332 | circuit->area->area_tag, | |
2333 | rawlspid_print (lsp->lsp_header->lsp_id), | |
2334 | ntohl (lsp->lsp_header->seq_num), | |
2335 | ntohs (lsp->lsp_header->checksum), | |
2336 | ntohs (lsp->lsp_header->rem_lifetime)); | |
f390d2c7 | 2337 | } |
eb5d44eb | 2338 | } |
eb5d44eb | 2339 | |
9985f83c | 2340 | length = (u_int16_t) stream_get_endp (circuit->snd_stream); |
eb5d44eb | 2341 | assert (length >= ISIS_PSNP_HDRLEN); |
2342 | /* Update PDU length */ | |
2343 | stream_putw_at (circuit->snd_stream, lenp, length); | |
2344 | ||
2345 | return ISIS_OK; | |
2346 | } | |
2347 | ||
2348 | /* | |
2349 | * 7.3.15.4 action on expiration of partial SNP interval | |
2350 | * level 1 | |
2351 | */ | |
92365889 | 2352 | static int |
eb5d44eb | 2353 | send_psnp (int level, struct isis_circuit *circuit) |
2354 | { | |
2355 | int retval = ISIS_OK; | |
2356 | struct isis_lsp *lsp; | |
2357 | struct list *list = NULL; | |
3fdb2dd9 | 2358 | struct listnode *node; |
eb5d44eb | 2359 | |
f390d2c7 | 2360 | if ((circuit->circ_type == CIRCUIT_T_BROADCAST && |
eb5d44eb | 2361 | !circuit->u.bc.is_dr[level - 1]) || |
f390d2c7 | 2362 | circuit->circ_type != CIRCUIT_T_BROADCAST) |
2363 | { | |
eb5d44eb | 2364 | |
f390d2c7 | 2365 | if (circuit->area->lspdb[level - 1] && |
2366 | dict_count (circuit->area->lspdb[level - 1]) > 0) | |
2367 | { | |
2368 | list = list_new (); | |
2369 | lsp_build_list_ssn (circuit, list, circuit->area->lspdb[level - 1]); | |
2370 | ||
2371 | if (listcount (list) > 0) | |
2372 | { | |
2373 | if (circuit->snd_stream == NULL) | |
2374 | circuit->snd_stream = stream_new (ISO_MTU (circuit)); | |
2375 | else | |
2376 | stream_reset (circuit->snd_stream); | |
2377 | ||
2378 | ||
2379 | if (isis->debugs & DEBUG_SNP_PACKETS) | |
529d65b3 | 2380 | zlog_debug ("ISIS-Snp (%s): Sent L%d PSNP on %s, length %ld", |
2381 | circuit->area->area_tag, level, | |
2382 | circuit->interface->name, | |
29e50b23 | 2383 | /* FIXME: use %z when we stop supporting old |
2384 | * compilers. */ | |
2385 | (unsigned long) STREAM_SIZE (circuit->snd_stream)); | |
f390d2c7 | 2386 | |
2387 | retval = build_psnp (level, circuit, list); | |
2388 | if (retval == ISIS_OK) | |
2389 | retval = circuit->tx (circuit, level); | |
2390 | ||
2391 | if (retval == ISIS_OK) | |
2392 | { | |
2393 | /* | |
2394 | * sending succeeded, we can clear SSN flags of this circuit | |
2395 | * for the LSPs in list | |
2396 | */ | |
3fdb2dd9 | 2397 | for (ALL_LIST_ELEMENTS_RO (list, node, lsp)) |
1eb8ef25 | 2398 | ISIS_CLEAR_FLAG (lsp->SSNflags, circuit); |
f390d2c7 | 2399 | } |
2400 | } | |
2401 | list_delete (list); | |
2402 | } | |
eb5d44eb | 2403 | } |
eb5d44eb | 2404 | |
2405 | return retval; | |
2406 | } | |
2407 | ||
2408 | int | |
2409 | send_l1_psnp (struct thread *thread) | |
2410 | { | |
2411 | ||
2412 | struct isis_circuit *circuit; | |
2413 | int retval = ISIS_OK; | |
2414 | ||
2415 | circuit = THREAD_ARG (thread); | |
2416 | assert (circuit); | |
2417 | ||
2418 | circuit->t_send_psnp[0] = NULL; | |
2419 | ||
2420 | send_psnp (1, circuit); | |
2421 | /* set next timer thread */ | |
f390d2c7 | 2422 | THREAD_TIMER_ON (master, circuit->t_send_psnp[0], send_l1_psnp, circuit, |
2423 | isis_jitter (circuit->psnp_interval[0], PSNP_JITTER)); | |
eb5d44eb | 2424 | |
2425 | return retval; | |
2426 | } | |
2427 | ||
2428 | /* | |
2429 | * 7.3.15.4 action on expiration of partial SNP interval | |
2430 | * level 2 | |
2431 | */ | |
2432 | int | |
2433 | send_l2_psnp (struct thread *thread) | |
2434 | { | |
eb5d44eb | 2435 | struct isis_circuit *circuit; |
2436 | int retval = ISIS_OK; | |
2437 | ||
2438 | circuit = THREAD_ARG (thread); | |
2439 | assert (circuit); | |
2440 | ||
2441 | circuit->t_send_psnp[1] = NULL; | |
2442 | ||
2443 | send_psnp (2, circuit); | |
2444 | ||
2445 | /* set next timer thread */ | |
f390d2c7 | 2446 | THREAD_TIMER_ON (master, circuit->t_send_psnp[1], send_l2_psnp, circuit, |
2447 | isis_jitter (circuit->psnp_interval[1], PSNP_JITTER)); | |
eb5d44eb | 2448 | |
2449 | return retval; | |
2450 | } | |
2451 | ||
eb5d44eb | 2452 | /* |
2453 | * ISO 10589 - 7.3.14.3 | |
2454 | */ | |
2455 | int | |
2456 | send_lsp (struct thread *thread) | |
2457 | { | |
2458 | struct isis_circuit *circuit; | |
2459 | struct isis_lsp *lsp; | |
2460 | struct listnode *node; | |
2461 | int retval = 0; | |
2462 | ||
2463 | circuit = THREAD_ARG (thread); | |
2464 | assert (circuit); | |
2465 | ||
f390d2c7 | 2466 | if (circuit->state == C_STATE_UP) |
2467 | { | |
1eb8ef25 | 2468 | lsp = listgetdata ((node = listhead (circuit->lsp_queue))); |
eb5d44eb | 2469 | |
2470 | /* | |
f390d2c7 | 2471 | * Do not send if levels do not match |
eb5d44eb | 2472 | */ |
f390d2c7 | 2473 | if (!(lsp->level & circuit->circuit_is_type)) |
2474 | goto dontsend; | |
eb5d44eb | 2475 | |
f390d2c7 | 2476 | /* |
2477 | * Do not send if we do not have adjacencies in state up on the circuit | |
2478 | */ | |
2479 | if (circuit->upadjcount[lsp->level - 1] == 0) | |
2480 | goto dontsend; | |
2481 | /* only send if it needs sending */ | |
2482 | if ((time (NULL) - lsp->last_sent) >= | |
2483 | circuit->area->lsp_gen_interval[lsp->level - 1]) | |
2484 | { | |
2485 | ||
2486 | if (isis->debugs & DEBUG_UPDATE_PACKETS) | |
2487 | { | |
529d65b3 | 2488 | zlog_debug |
f390d2c7 | 2489 | ("ISIS-Upd (%s): Sent L%d LSP %s, seq 0x%08x, cksum 0x%04x," |
2490 | " lifetime %us on %s", circuit->area->area_tag, lsp->level, | |
2491 | rawlspid_print (lsp->lsp_header->lsp_id), | |
2492 | ntohl (lsp->lsp_header->seq_num), | |
2493 | ntohs (lsp->lsp_header->checksum), | |
2494 | ntohs (lsp->lsp_header->rem_lifetime), | |
2495 | circuit->interface->name); | |
2496 | } | |
2497 | /* copy our lsp to the send buffer */ | |
15935e9a | 2498 | stream_copy (circuit->snd_stream, lsp->pdu); |
f390d2c7 | 2499 | |
2500 | retval = circuit->tx (circuit, lsp->level); | |
eb5d44eb | 2501 | |
eb5d44eb | 2502 | /* |
f390d2c7 | 2503 | * If the sending succeeded, we can del the lsp from circuits |
2504 | * lsp_queue | |
eb5d44eb | 2505 | */ |
f390d2c7 | 2506 | if (retval == ISIS_OK) |
2507 | { | |
2508 | list_delete_node (circuit->lsp_queue, node); | |
2509 | ||
2510 | /* | |
2511 | * On broadcast circuits also the SRMflag can be cleared | |
2512 | */ | |
2513 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) | |
2514 | ISIS_CLEAR_FLAG (lsp->SRMflags, circuit); | |
2515 | ||
2516 | if (flags_any_set (lsp->SRMflags) == 0) | |
2517 | { | |
2518 | /* | |
2519 | * need to remember when we were last sent | |
2520 | */ | |
2521 | lsp->last_sent = time (NULL); | |
2522 | } | |
2523 | } | |
2524 | else | |
2525 | { | |
529d65b3 | 2526 | zlog_debug ("sending of level %d link state failed", lsp->level); |
f390d2c7 | 2527 | } |
2528 | } | |
2529 | else | |
2530 | { | |
2531 | /* my belief is that if it wasn't his time, the lsp can be removed | |
2532 | * from the queue | |
2533 | */ | |
2534 | dontsend: | |
2535 | list_delete_node (circuit->lsp_queue, node); | |
eb5d44eb | 2536 | } |
eb5d44eb | 2537 | #if 0 |
f390d2c7 | 2538 | /* |
2539 | * If there are still LSPs send next one after lsp-interval (33 msecs) | |
2540 | */ | |
2541 | if (listcount (circuit->lsp_queue) > 0) | |
2542 | thread_add_timer (master, send_lsp, circuit, 1); | |
eb5d44eb | 2543 | #endif |
f390d2c7 | 2544 | } |
eb5d44eb | 2545 | |
2546 | return retval; | |
f390d2c7 | 2547 | } |
eb5d44eb | 2548 | |
2549 | int | |
f390d2c7 | 2550 | ack_lsp (struct isis_link_state_hdr *hdr, struct isis_circuit *circuit, |
2551 | int level) | |
eb5d44eb | 2552 | { |
2553 | unsigned long lenp; | |
2554 | int retval; | |
2555 | u_int16_t length; | |
2556 | struct isis_fixed_hdr fixed_hdr; | |
2557 | ||
2558 | if (!circuit->snd_stream) | |
f390d2c7 | 2559 | circuit->snd_stream = stream_new (ISO_MTU (circuit)); |
eb5d44eb | 2560 | else |
2561 | stream_reset (circuit->snd_stream); | |
2562 | ||
2563 | // fill_llc_hdr (stream); | |
2564 | if (level == 1) | |
f390d2c7 | 2565 | fill_fixed_hdr_andstream (&fixed_hdr, L1_PARTIAL_SEQ_NUM, |
2566 | circuit->snd_stream); | |
eb5d44eb | 2567 | else |
f390d2c7 | 2568 | fill_fixed_hdr_andstream (&fixed_hdr, L2_PARTIAL_SEQ_NUM, |
2569 | circuit->snd_stream); | |
eb5d44eb | 2570 | |
2571 | ||
9985f83c | 2572 | lenp = stream_get_endp (circuit->snd_stream); |
f390d2c7 | 2573 | stream_putw (circuit->snd_stream, 0); /* PDU length */ |
2574 | stream_put (circuit->snd_stream, isis->sysid, ISIS_SYS_ID_LEN); | |
eb5d44eb | 2575 | stream_putc (circuit->snd_stream, circuit->idx); |
f390d2c7 | 2576 | stream_putc (circuit->snd_stream, 9); /* code */ |
2577 | stream_putc (circuit->snd_stream, 16); /* len */ | |
eb5d44eb | 2578 | |
f390d2c7 | 2579 | stream_putw (circuit->snd_stream, ntohs (hdr->rem_lifetime)); |
2580 | stream_put (circuit->snd_stream, hdr->lsp_id, ISIS_SYS_ID_LEN + 2); | |
2581 | stream_putl (circuit->snd_stream, ntohl (hdr->seq_num)); | |
2582 | stream_putw (circuit->snd_stream, ntohs (hdr->checksum)); | |
eb5d44eb | 2583 | |
9985f83c | 2584 | length = (u_int16_t) stream_get_endp (circuit->snd_stream); |
eb5d44eb | 2585 | /* Update PDU length */ |
2586 | stream_putw_at (circuit->snd_stream, lenp, length); | |
2587 | ||
2588 | retval = circuit->tx (circuit, level); | |
2589 | ||
2590 | return retval; | |
2591 | } | |
2592 |