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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 | ||
24 | #include <stdio.h> | |
25 | #include <string.h> | |
26 | #include <zebra.h> | |
eb5d44eb | 27 | |
28 | #include "memory.h" | |
29 | #include "thread.h" | |
30 | #include "linklist.h" | |
31 | #include "log.h" | |
32 | #include "stream.h" | |
33 | #include "vty.h" | |
34 | #include "hash.c" | |
35 | #include "prefix.h" | |
36 | #include "if.h" | |
37 | ||
38 | #include "isisd/dict.h" | |
39 | #include "isisd/include-netbsd/iso.h" | |
40 | #include "isisd/isis_constants.h" | |
41 | #include "isisd/isis_common.h" | |
42 | #include "isisd/isis_adjacency.h" | |
43 | #include "isisd/isis_circuit.h" | |
44 | #include "isisd/isis_network.h" | |
45 | #include "isisd/isis_misc.h" | |
46 | #include "isisd/isis_dr.h" | |
47 | #include "isisd/isis_flags.h" | |
48 | #include "isisd/isis_tlv.h" | |
49 | #include "isisd/isisd.h" | |
50 | #include "isisd/isis_dynhn.h" | |
51 | #include "isisd/isis_lsp.h" | |
52 | #include "isisd/isis_pdu.h" | |
53 | #include "isisd/iso_checksum.h" | |
54 | #include "isisd/isis_csm.h" | |
55 | #include "isisd/isis_events.h" | |
56 | ||
57 | extern struct thread_master *master; | |
58 | extern struct isis *isis; | |
59 | ||
60 | #define ISIS_MINIMUM_FIXED_HDR_LEN 15 | |
f390d2c7 | 61 | #define ISIS_MIN_PDU_LEN 13 /* partial seqnum pdu with id_len=2 */ |
eb5d44eb | 62 | |
63 | #ifndef PNBBY | |
64 | #define PNBBY 8 | |
65 | #endif /* PNBBY */ | |
66 | ||
67 | /* Utility mask array. */ | |
f390d2c7 | 68 | static u_char maskbit[] = { |
eb5d44eb | 69 | 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff |
70 | }; | |
71 | ||
72 | /* | |
73 | * HELPER FUNCS | |
74 | */ | |
75 | ||
76 | /* | |
77 | * Compares two sets of area addresses | |
78 | */ | |
f390d2c7 | 79 | static int |
eb5d44eb | 80 | area_match (struct list *left, struct list *right) |
81 | { | |
82 | struct area_addr *addr1, *addr2; | |
1eb8ef25 | 83 | struct listnode *node1, *nnode1; |
84 | struct listnode *node2, *nnode2; | |
eb5d44eb | 85 | |
1eb8ef25 | 86 | for (ALL_LIST_ELEMENTS (left, node1, nnode1, addr1)) |
f390d2c7 | 87 | { |
1eb8ef25 | 88 | for (ALL_LIST_ELEMENTS (right, node2, nnode2, addr2)) |
f390d2c7 | 89 | { |
90 | if (addr1->addr_len == addr2->addr_len && | |
91 | !memcmp (addr1->area_addr, addr2->area_addr, (int) addr1->addr_len)) | |
92 | return 1; /* match */ | |
eb5d44eb | 93 | } |
94 | } | |
95 | ||
f390d2c7 | 96 | return 0; /* mismatch */ |
eb5d44eb | 97 | } |
98 | ||
99 | /* | |
100 | * Check if ip2 is in the ip1's network (function like Prefix.h:prefix_match() ) | |
101 | * param ip1 the IS interface ip address structure | |
102 | * param ip2 the IIH's ip address | |
103 | * return 0 the IIH's IP is not in the IS's subnetwork | |
104 | * 1 the IIH's IP is in the IS's subnetwork | |
105 | */ | |
92365889 | 106 | static int |
f390d2c7 | 107 | ip_same_subnet (struct prefix_ipv4 *ip1, struct in_addr *ip2) |
eb5d44eb | 108 | { |
109 | u_char *addr1, *addr2; | |
53c997c9 | 110 | int shift, offset, offsetloop; |
eb5d44eb | 111 | int len; |
f390d2c7 | 112 | |
113 | addr1 = (u_char *) & ip1->prefix.s_addr; | |
114 | addr2 = (u_char *) & ip2->s_addr; | |
eb5d44eb | 115 | len = ip1->prefixlen; |
116 | ||
117 | shift = len % PNBBY; | |
53c997c9 | 118 | offsetloop = offset = len / PNBBY; |
eb5d44eb | 119 | |
53c997c9 | 120 | while (offsetloop--) |
121 | if (addr1[offsetloop] != addr2[offsetloop]) | |
122 | return 0; | |
eb5d44eb | 123 | |
f390d2c7 | 124 | if (shift) |
53c997c9 | 125 | if (maskbit[shift] & (addr1[offset] ^ addr2[offset])) |
126 | return 0; | |
eb5d44eb | 127 | |
f390d2c7 | 128 | return 1; /* match */ |
129 | } | |
eb5d44eb | 130 | |
131 | /* | |
132 | * Compares two set of ip addresses | |
133 | * param left the local interface's ip addresses | |
134 | * param right the iih interface's ip address | |
135 | * return 0 no match; | |
136 | * 1 match; | |
137 | */ | |
f390d2c7 | 138 | static int |
eb5d44eb | 139 | ip_match (struct list *left, struct list *right) |
140 | { | |
141 | struct prefix_ipv4 *ip1; | |
142 | struct in_addr *ip2; | |
1eb8ef25 | 143 | struct listnode *node1, *nnode1; |
144 | struct listnode *node2, *nnode2; | |
eb5d44eb | 145 | |
e082ac1d | 146 | if ((left == NULL) || (right == NULL)) |
147 | return 0; | |
148 | ||
1eb8ef25 | 149 | for (ALL_LIST_ELEMENTS (left, node1, nnode1, ip1)) |
f390d2c7 | 150 | { |
1eb8ef25 | 151 | for (ALL_LIST_ELEMENTS (right, node2, nnode2, ip2)) |
f390d2c7 | 152 | { |
153 | if (ip_same_subnet (ip1, ip2)) | |
154 | { | |
155 | return 1; /* match */ | |
156 | } | |
eb5d44eb | 157 | } |
f390d2c7 | 158 | |
eb5d44eb | 159 | } |
160 | return 0; | |
161 | } | |
162 | ||
163 | /* | |
164 | * Checks whether we should accept a PDU of given level | |
165 | */ | |
166 | static int | |
167 | accept_level (int level, int circuit_t) | |
168 | { | |
f390d2c7 | 169 | int retval = ((circuit_t & level) == level); /* simple approach */ |
eb5d44eb | 170 | |
171 | return retval; | |
172 | } | |
173 | ||
f390d2c7 | 174 | int |
eb5d44eb | 175 | authentication_check (struct isis_passwd *one, struct isis_passwd *theother) |
176 | { | |
f390d2c7 | 177 | if (one->type != theother->type) |
178 | { | |
179 | zlog_warn ("Unsupported authentication type %d", theother->type); | |
180 | return 1; /* Auth fail (different authentication types) */ | |
181 | } | |
182 | switch (one->type) | |
183 | { | |
184 | case ISIS_PASSWD_TYPE_CLEARTXT: | |
185 | if (one->len != theother->len) | |
186 | return 1; /* Auth fail () - passwd len mismatch */ | |
187 | return memcmp (one->passwd, theother->passwd, one->len); | |
188 | break; | |
189 | default: | |
190 | zlog_warn ("Unsupported authentication type"); | |
191 | break; | |
192 | } | |
193 | return 0; /* Auth pass */ | |
eb5d44eb | 194 | } |
195 | ||
196 | /* | |
197 | * Processing helper functions | |
198 | */ | |
92365889 | 199 | static void |
f390d2c7 | 200 | tlvs_to_adj_nlpids (struct tlvs *tlvs, struct isis_adjacency *adj) |
eb5d44eb | 201 | { |
202 | int i; | |
203 | struct nlpids *tlv_nlpids; | |
204 | ||
f390d2c7 | 205 | if (tlvs->nlpids) |
206 | { | |
eb5d44eb | 207 | |
f390d2c7 | 208 | tlv_nlpids = tlvs->nlpids; |
eb5d44eb | 209 | |
f390d2c7 | 210 | adj->nlpids.count = tlv_nlpids->count; |
eb5d44eb | 211 | |
f390d2c7 | 212 | for (i = 0; i < tlv_nlpids->count; i++) |
213 | { | |
214 | adj->nlpids.nlpids[i] = tlv_nlpids->nlpids[i]; | |
215 | } | |
eb5d44eb | 216 | } |
eb5d44eb | 217 | } |
218 | ||
92365889 | 219 | static void |
eb5d44eb | 220 | del_ip_addr (void *val) |
221 | { | |
222 | XFREE (MTYPE_ISIS_TMP, val); | |
223 | } | |
224 | ||
92365889 | 225 | static void |
f390d2c7 | 226 | tlvs_to_adj_ipv4_addrs (struct tlvs *tlvs, struct isis_adjacency *adj) |
eb5d44eb | 227 | { |
1eb8ef25 | 228 | struct listnode *node, *nnode; |
eb5d44eb | 229 | struct in_addr *ipv4_addr, *malloced; |
230 | ||
f390d2c7 | 231 | if (adj->ipv4_addrs) |
232 | { | |
233 | adj->ipv4_addrs->del = del_ip_addr; | |
234 | list_delete (adj->ipv4_addrs); | |
235 | } | |
eb5d44eb | 236 | adj->ipv4_addrs = list_new (); |
f390d2c7 | 237 | if (tlvs->ipv4_addrs) |
238 | { | |
1eb8ef25 | 239 | for (ALL_LIST_ELEMENTS (tlvs->ipv4_addrs, node, nnode, ipv4_addr)) |
f390d2c7 | 240 | { |
241 | malloced = XMALLOC (MTYPE_ISIS_TMP, sizeof (struct in_addr)); | |
242 | memcpy (malloced, ipv4_addr, sizeof (struct in_addr)); | |
243 | listnode_add (adj->ipv4_addrs, malloced); | |
244 | } | |
eb5d44eb | 245 | } |
eb5d44eb | 246 | } |
247 | ||
248 | #ifdef HAVE_IPV6 | |
92365889 | 249 | static void |
f390d2c7 | 250 | tlvs_to_adj_ipv6_addrs (struct tlvs *tlvs, struct isis_adjacency *adj) |
eb5d44eb | 251 | { |
1eb8ef25 | 252 | struct listnode *node, *nnode; |
eb5d44eb | 253 | struct in6_addr *ipv6_addr, *malloced; |
254 | ||
f390d2c7 | 255 | if (adj->ipv6_addrs) |
256 | { | |
257 | adj->ipv6_addrs->del = del_ip_addr; | |
258 | list_delete (adj->ipv6_addrs); | |
259 | } | |
eb5d44eb | 260 | adj->ipv6_addrs = list_new (); |
f390d2c7 | 261 | if (tlvs->ipv6_addrs) |
262 | { | |
1eb8ef25 | 263 | for (ALL_LIST_ELEMENTS (tlvs->ipv6_addrs, node, nnode, ipv6_addr)) |
f390d2c7 | 264 | { |
265 | malloced = XMALLOC (MTYPE_ISIS_TMP, sizeof (struct in6_addr)); | |
266 | memcpy (malloced, ipv6_addr, sizeof (struct in6_addr)); | |
267 | listnode_add (adj->ipv6_addrs, malloced); | |
268 | } | |
eb5d44eb | 269 | } |
eb5d44eb | 270 | |
271 | } | |
272 | #endif /* HAVE_IPV6 */ | |
273 | ||
eb5d44eb | 274 | /* |
275 | * RECEIVE SIDE | |
276 | */ | |
277 | ||
278 | /* | |
279 | * Process P2P IIH | |
280 | * ISO - 10589 | |
281 | * Section 8.2.5 - Receiving point-to-point IIH PDUs | |
282 | * | |
283 | */ | |
284 | static int | |
285 | process_p2p_hello (struct isis_circuit *circuit) | |
286 | { | |
287 | int retval = ISIS_OK; | |
288 | struct isis_p2p_hello_hdr *hdr; | |
289 | struct isis_adjacency *adj; | |
290 | u_int32_t expected = 0, found; | |
291 | struct tlvs tlvs; | |
292 | ||
f390d2c7 | 293 | if ((stream_get_endp (circuit->rcv_stream) - |
294 | stream_get_getp (circuit->rcv_stream)) < ISIS_P2PHELLO_HDRLEN) | |
295 | { | |
296 | zlog_warn ("Packet too short"); | |
297 | return ISIS_WARNING; | |
298 | } | |
eb5d44eb | 299 | |
300 | /* 8.2.5.1 PDU acceptance tests */ | |
301 | ||
302 | /* 8.2.5.1 a) external domain untrue */ | |
303 | /* FIXME: not useful at all? */ | |
304 | ||
305 | /* 8.2.5.1 b) ID Length mismatch */ | |
306 | /* checked at the handle_pdu */ | |
307 | ||
308 | /* 8.2.5.2 IIH PDU Processing */ | |
309 | ||
310 | /* 8.2.5.2 a) 1) Maximum Area Addresses */ | |
311 | /* Already checked, and can also be ommited */ | |
312 | ||
313 | /* | |
314 | * Get the header | |
315 | */ | |
f390d2c7 | 316 | hdr = (struct isis_p2p_hello_hdr *) STREAM_PNT (circuit->rcv_stream); |
eb5d44eb | 317 | circuit->rcv_stream->getp += ISIS_P2PHELLO_HDRLEN; |
318 | ||
319 | /* hdr.circuit_t = stream_getc (stream); | |
f390d2c7 | 320 | stream_get (hdr.source_id, stream, ISIS_SYS_ID_LEN); |
321 | hdr.hold_time = stream_getw (stream); | |
322 | hdr.pdu_len = stream_getw (stream); | |
323 | hdr.local_id = stream_getc (stream); */ | |
eb5d44eb | 324 | |
325 | /* | |
326 | * My interpertation of the ISO, if no adj exists we will create one for | |
327 | * the circuit | |
328 | */ | |
329 | ||
f390d2c7 | 330 | if (isis->debugs & DEBUG_ADJ_PACKETS) |
331 | { | |
529d65b3 | 332 | zlog_debug ("ISIS-Adj (%s): Rcvd P2P IIH from (%s), cir type %s," |
333 | " cir id %02d, length %d", | |
334 | circuit->area->area_tag, circuit->interface->name, | |
335 | circuit_t2string (circuit->circuit_is_type), | |
336 | circuit->circuit_id, ntohs (hdr->pdu_len)); | |
f390d2c7 | 337 | } |
eb5d44eb | 338 | |
339 | adj = circuit->u.p2p.neighbor; | |
f390d2c7 | 340 | if (!adj) |
341 | { | |
f7c43dcb | 342 | adj = isis_new_adj (hdr->source_id, (u_char *) " ", 0, circuit); |
f390d2c7 | 343 | if (adj == NULL) |
344 | return ISIS_ERROR; | |
345 | circuit->u.p2p.neighbor = adj; | |
346 | isis_adj_state_change (adj, ISIS_ADJ_INITIALIZING, NULL); | |
347 | adj->sys_type = ISIS_SYSTYPE_UNKNOWN; | |
348 | } | |
eb5d44eb | 349 | |
350 | /* 8.2.6 Monitoring point-to-point adjacencies */ | |
351 | adj->hold_time = ntohs (hdr->hold_time); | |
f390d2c7 | 352 | adj->last_upd = time (NULL); |
eb5d44eb | 353 | |
354 | /* | |
355 | * Lets get the TLVS now | |
356 | */ | |
357 | expected |= TLVFLAG_AREA_ADDRS; | |
358 | expected |= TLVFLAG_AUTH_INFO; | |
359 | expected |= TLVFLAG_NLPID; | |
360 | expected |= TLVFLAG_IPV4_ADDR; | |
361 | expected |= TLVFLAG_IPV6_ADDR; | |
362 | ||
363 | retval = parse_tlvs (circuit->area->area_tag, | |
364 | STREAM_PNT (circuit->rcv_stream), | |
f390d2c7 | 365 | ntohs (hdr->pdu_len) - ISIS_P2PHELLO_HDRLEN |
366 | - ISIS_FIXED_HDR_LEN, &expected, &found, &tlvs); | |
367 | ||
368 | if (retval > ISIS_WARNING) | |
369 | { | |
370 | free_tlvs (&tlvs); | |
371 | return retval; | |
372 | }; | |
eb5d44eb | 373 | |
374 | /* 8.2.5.1 c) Authentication */ | |
f390d2c7 | 375 | if (circuit->passwd.type) |
376 | { | |
377 | if (!(found & TLVFLAG_AUTH_INFO) || | |
378 | authentication_check (&circuit->passwd, &tlvs.auth_info)) | |
379 | { | |
380 | isis_event_auth_failure (circuit->area->area_tag, | |
381 | "P2P hello authentication failure", | |
382 | hdr->source_id); | |
383 | return ISIS_OK; | |
384 | } | |
eb5d44eb | 385 | } |
eb5d44eb | 386 | |
387 | /* we do this now because the adj may not survive till the end... */ | |
388 | ||
389 | /* we need to copy addresses to the adj */ | |
f390d2c7 | 390 | tlvs_to_adj_ipv4_addrs (&tlvs, adj); |
eb5d44eb | 391 | |
392 | #ifdef HAVE_IPV6 | |
f390d2c7 | 393 | tlvs_to_adj_ipv6_addrs (&tlvs, adj); |
eb5d44eb | 394 | #endif /* HAVE_IPV6 */ |
395 | ||
396 | /* lets take care of the expiry */ | |
f390d2c7 | 397 | THREAD_TIMER_OFF (adj->t_expire); |
398 | THREAD_TIMER_ON (master, adj->t_expire, isis_adj_expire, adj, | |
399 | (long) adj->hold_time); | |
eb5d44eb | 400 | |
401 | /* 8.2.5.2 a) a match was detected */ | |
f390d2c7 | 402 | if (area_match (circuit->area->area_addrs, tlvs.area_addrs)) |
403 | { | |
404 | /* 8.2.5.2 a) 2) If the system is L1 - table 5 */ | |
405 | if (circuit->area->is_type == IS_LEVEL_1) | |
406 | { | |
407 | switch (hdr->circuit_t) | |
408 | { | |
409 | case IS_LEVEL_1: | |
410 | case IS_LEVEL_1_AND_2: | |
411 | if (adj->adj_state != ISIS_ADJ_UP) | |
412 | { | |
413 | /* (4) adj state up */ | |
414 | isis_adj_state_change (adj, ISIS_ADJ_UP, NULL); | |
415 | /* (5) adj usage level 1 */ | |
416 | adj->adj_usage = ISIS_ADJ_LEVEL1; | |
417 | } | |
418 | else if (adj->adj_usage == ISIS_ADJ_LEVEL1) | |
419 | { | |
420 | ; /* accept */ | |
421 | } | |
422 | break; | |
423 | case IS_LEVEL_2: | |
424 | if (adj->adj_state != ISIS_ADJ_UP) | |
425 | { | |
426 | /* (7) reject - wrong system type event */ | |
427 | zlog_warn ("wrongSystemType"); | |
428 | return ISIS_WARNING; /* Reject */ | |
429 | } | |
430 | else if (adj->adj_usage == ISIS_ADJ_LEVEL1) | |
431 | { | |
432 | /* (6) down - wrong system */ | |
433 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, "Wrong System"); | |
434 | } | |
435 | break; | |
436 | } | |
437 | } | |
eb5d44eb | 438 | |
f390d2c7 | 439 | /* 8.2.5.2 a) 3) If the system is L1L2 - table 6 */ |
440 | if (circuit->area->is_type == IS_LEVEL_1_AND_2) | |
441 | { | |
442 | switch (hdr->circuit_t) | |
443 | { | |
444 | case IS_LEVEL_1: | |
445 | if (adj->adj_state != ISIS_ADJ_UP) | |
446 | { | |
447 | /* (6) adj state up */ | |
448 | isis_adj_state_change (adj, ISIS_ADJ_UP, NULL); | |
449 | /* (7) adj usage level 1 */ | |
450 | adj->adj_usage = ISIS_ADJ_LEVEL1; | |
451 | } | |
452 | else if (adj->adj_usage == ISIS_ADJ_LEVEL1) | |
453 | { | |
454 | ; /* accept */ | |
455 | } | |
456 | else if ((adj->adj_usage == ISIS_ADJ_LEVEL1AND2) || | |
457 | (adj->adj_usage == ISIS_ADJ_LEVEL2)) | |
458 | { | |
459 | /* (8) down - wrong system */ | |
460 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, "Wrong System"); | |
461 | } | |
462 | break; | |
463 | case IS_LEVEL_2: | |
464 | if (adj->adj_state != ISIS_ADJ_UP) | |
465 | { | |
466 | /* (6) adj state up */ | |
467 | isis_adj_state_change (adj, ISIS_ADJ_UP, NULL); | |
468 | /* (9) adj usage level 2 */ | |
469 | adj->adj_usage = ISIS_ADJ_LEVEL2; | |
470 | } | |
471 | else if ((adj->adj_usage == ISIS_ADJ_LEVEL1) || | |
472 | (adj->adj_usage == ISIS_ADJ_LEVEL1AND2)) | |
473 | { | |
474 | /* (8) down - wrong system */ | |
475 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, "Wrong System"); | |
476 | } | |
477 | else if (adj->adj_usage == ISIS_ADJ_LEVEL2) | |
478 | { | |
479 | ; /* Accept */ | |
480 | } | |
481 | break; | |
482 | case IS_LEVEL_1_AND_2: | |
483 | if (adj->adj_state != ISIS_ADJ_UP) | |
484 | { | |
485 | /* (6) adj state up */ | |
486 | isis_adj_state_change (adj, ISIS_ADJ_UP, NULL); | |
487 | /* (10) adj usage level 1 */ | |
488 | adj->adj_usage = ISIS_ADJ_LEVEL1AND2; | |
489 | } | |
490 | else if ((adj->adj_usage == ISIS_ADJ_LEVEL1) || | |
491 | (adj->adj_usage == ISIS_ADJ_LEVEL2)) | |
492 | { | |
493 | /* (8) down - wrong system */ | |
494 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, "Wrong System"); | |
495 | } | |
496 | else if (adj->adj_usage == ISIS_ADJ_LEVEL1AND2) | |
497 | { | |
498 | ; /* Accept */ | |
499 | } | |
500 | break; | |
501 | } | |
502 | } | |
eb5d44eb | 503 | |
f390d2c7 | 504 | /* 8.2.5.2 a) 4) If the system is L2 - table 7 */ |
505 | if (circuit->area->is_type == IS_LEVEL_2) | |
506 | { | |
507 | switch (hdr->circuit_t) | |
508 | { | |
509 | case IS_LEVEL_1: | |
510 | if (adj->adj_state != ISIS_ADJ_UP) | |
511 | { | |
512 | /* (5) reject - wrong system type event */ | |
513 | zlog_warn ("wrongSystemType"); | |
514 | return ISIS_WARNING; /* Reject */ | |
515 | } | |
516 | else if ((adj->adj_usage == ISIS_ADJ_LEVEL1AND2) || | |
517 | (adj->adj_usage == ISIS_ADJ_LEVEL2)) | |
518 | { | |
519 | /* (6) down - wrong system */ | |
520 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, "Wrong System"); | |
521 | } | |
522 | break; | |
523 | case IS_LEVEL_1_AND_2: | |
524 | case IS_LEVEL_2: | |
525 | if (adj->adj_state != ISIS_ADJ_UP) | |
526 | { | |
527 | /* (7) adj state up */ | |
528 | isis_adj_state_change (adj, ISIS_ADJ_UP, NULL); | |
529 | /* (8) adj usage level 2 */ | |
530 | adj->adj_usage = ISIS_ADJ_LEVEL2; | |
531 | } | |
532 | else if (adj->adj_usage == ISIS_ADJ_LEVEL1AND2) | |
533 | { | |
534 | /* (6) down - wrong system */ | |
535 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, "Wrong System"); | |
536 | } | |
537 | else if (adj->adj_usage == ISIS_ADJ_LEVEL2) | |
538 | { | |
539 | ; /* Accept */ | |
540 | } | |
541 | break; | |
542 | } | |
543 | } | |
eb5d44eb | 544 | } |
eb5d44eb | 545 | /* 8.2.5.2 b) if no match was detected */ |
546 | else | |
eb5d44eb | 547 | { |
f390d2c7 | 548 | if (circuit->area->is_type == IS_LEVEL_1) |
549 | { | |
550 | /* 8.2.5.2 b) 1) is_type L1 and adj is not up */ | |
551 | if (adj->adj_state != ISIS_ADJ_UP) | |
552 | { | |
553 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, "Area Mismatch"); | |
554 | /* 8.2.5.2 b) 2)is_type L1 and adj is up */ | |
555 | } | |
556 | else | |
557 | { | |
558 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, | |
559 | "Down - Area Mismatch"); | |
560 | } | |
561 | } | |
562 | /* 8.2.5.2 b 3 If the system is L2 or L1L2 - table 8 */ | |
563 | else | |
564 | { | |
565 | switch (hdr->circuit_t) | |
566 | { | |
567 | case IS_LEVEL_1: | |
568 | if (adj->adj_state != ISIS_ADJ_UP) | |
569 | { | |
570 | /* (6) reject - Area Mismatch event */ | |
571 | zlog_warn ("AreaMismatch"); | |
572 | return ISIS_WARNING; /* Reject */ | |
573 | } | |
574 | else if (adj->adj_usage == ISIS_ADJ_LEVEL1) | |
575 | { | |
576 | /* (7) down - area mismatch */ | |
577 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, "Area Mismatch"); | |
578 | ||
579 | } | |
580 | else if ((adj->adj_usage == ISIS_ADJ_LEVEL1AND2) || | |
581 | (adj->adj_usage == ISIS_ADJ_LEVEL2)) | |
582 | { | |
583 | /* (7) down - wrong system */ | |
584 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, "Wrong System"); | |
585 | } | |
586 | break; | |
587 | case IS_LEVEL_1_AND_2: | |
588 | case IS_LEVEL_2: | |
589 | if (adj->adj_state != ISIS_ADJ_UP) | |
590 | { | |
591 | /* (8) adj state up */ | |
592 | isis_adj_state_change (adj, ISIS_ADJ_UP, NULL); | |
593 | /* (9) adj usage level 2 */ | |
594 | adj->adj_usage = ISIS_ADJ_LEVEL2; | |
595 | } | |
596 | else if (adj->adj_usage == ISIS_ADJ_LEVEL1) | |
597 | { | |
598 | /* (7) down - wrong system */ | |
599 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, "Wrong System"); | |
600 | } | |
601 | else if (adj->adj_usage == ISIS_ADJ_LEVEL1AND2) | |
602 | { | |
603 | if (hdr->circuit_t == IS_LEVEL_2) | |
604 | { | |
605 | /* (7) down - wrong system */ | |
606 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, | |
607 | "Wrong System"); | |
608 | } | |
609 | else | |
610 | { | |
611 | /* (7) down - area mismatch */ | |
612 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, | |
613 | "Area Mismatch"); | |
614 | } | |
615 | } | |
616 | else if (adj->adj_usage == ISIS_ADJ_LEVEL2) | |
617 | { | |
618 | ; /* Accept */ | |
619 | } | |
620 | break; | |
621 | } | |
622 | } | |
eb5d44eb | 623 | } |
eb5d44eb | 624 | /* 8.2.5.2 c) if the action was up - comparing circuit IDs */ |
625 | /* FIXME - Missing parts */ | |
626 | ||
eb5d44eb | 627 | /* some of my own understanding of the ISO, why the heck does |
628 | * it not say what should I change the system_type to... | |
629 | */ | |
f390d2c7 | 630 | switch (adj->adj_usage) |
631 | { | |
eb5d44eb | 632 | case ISIS_ADJ_LEVEL1: |
633 | adj->sys_type = ISIS_SYSTYPE_L1_IS; | |
634 | break; | |
635 | case ISIS_ADJ_LEVEL2: | |
636 | adj->sys_type = ISIS_SYSTYPE_L2_IS; | |
637 | break; | |
638 | case ISIS_ADJ_LEVEL1AND2: | |
639 | adj->sys_type = ISIS_SYSTYPE_L2_IS; | |
640 | break; | |
641 | case ISIS_ADJ_NONE: | |
642 | adj->sys_type = ISIS_SYSTYPE_UNKNOWN; | |
643 | break; | |
f390d2c7 | 644 | } |
eb5d44eb | 645 | |
646 | adj->circuit_t = hdr->circuit_t; | |
647 | adj->level = hdr->circuit_t; | |
648 | ||
649 | free_tlvs (&tlvs); | |
650 | ||
651 | return retval; | |
652 | } | |
653 | ||
eb5d44eb | 654 | /* |
655 | * Process IS-IS LAN Level 1/2 Hello PDU | |
656 | */ | |
f390d2c7 | 657 | static int |
658 | process_lan_hello (int level, struct isis_circuit *circuit, u_char * ssnpa) | |
eb5d44eb | 659 | { |
660 | int retval = ISIS_OK; | |
661 | struct isis_lan_hello_hdr hdr; | |
662 | struct isis_adjacency *adj; | |
663 | u_int32_t expected = 0, found; | |
664 | struct tlvs tlvs; | |
665 | u_char *snpa; | |
1eb8ef25 | 666 | struct listnode *node, *nnode; |
eb5d44eb | 667 | |
f390d2c7 | 668 | if ((stream_get_endp (circuit->rcv_stream) - |
669 | stream_get_getp (circuit->rcv_stream)) < ISIS_LANHELLO_HDRLEN) | |
670 | { | |
671 | zlog_warn ("Packet too short"); | |
672 | return ISIS_WARNING; | |
673 | } | |
eb5d44eb | 674 | |
f390d2c7 | 675 | if (circuit->ext_domain) |
676 | { | |
529d65b3 | 677 | zlog_debug ("level %d LAN Hello received over circuit with " |
678 | "externalDomain = true", level); | |
f390d2c7 | 679 | return ISIS_WARNING; |
680 | } | |
eb5d44eb | 681 | |
f390d2c7 | 682 | if (!accept_level (level, circuit->circuit_is_type)) |
683 | { | |
684 | if (isis->debugs & DEBUG_ADJ_PACKETS) | |
685 | { | |
529d65b3 | 686 | zlog_debug ("ISIS-Adj (%s): Interface level mismatch, %s", |
687 | circuit->area->area_tag, circuit->interface->name); | |
f390d2c7 | 688 | } |
689 | return ISIS_WARNING; | |
eb5d44eb | 690 | } |
eb5d44eb | 691 | |
692 | #if 0 | |
693 | /* Cisco's debug message compatability */ | |
f390d2c7 | 694 | if (!accept_level (level, circuit->area->is_type)) |
695 | { | |
696 | if (isis->debugs & DEBUG_ADJ_PACKETS) | |
697 | { | |
529d65b3 | 698 | zlog_debug ("ISIS-Adj (%s): is type mismatch", |
699 | circuit->area->area_tag); | |
f390d2c7 | 700 | } |
701 | return ISIS_WARNING; | |
eb5d44eb | 702 | } |
eb5d44eb | 703 | #endif |
704 | /* | |
705 | * Fill the header | |
706 | */ | |
707 | hdr.circuit_t = stream_getc (circuit->rcv_stream); | |
708 | stream_get (hdr.source_id, circuit->rcv_stream, ISIS_SYS_ID_LEN); | |
709 | hdr.hold_time = stream_getw (circuit->rcv_stream); | |
f390d2c7 | 710 | hdr.pdu_len = stream_getw (circuit->rcv_stream); |
711 | hdr.prio = stream_getc (circuit->rcv_stream); | |
eb5d44eb | 712 | stream_get (hdr.lan_id, circuit->rcv_stream, ISIS_SYS_ID_LEN + 1); |
713 | ||
714 | if (hdr.circuit_t != IS_LEVEL_1 && hdr.circuit_t != IS_LEVEL_2 && | |
f390d2c7 | 715 | hdr.circuit_t != IS_LEVEL_1_AND_2) |
716 | { | |
717 | zlog_warn ("Level %d LAN Hello with Circuit Type %d", level, | |
718 | hdr.circuit_t); | |
719 | return ISIS_ERROR; | |
720 | } | |
eb5d44eb | 721 | /* |
722 | * Then get the tlvs | |
723 | */ | |
724 | expected |= TLVFLAG_AUTH_INFO; | |
725 | expected |= TLVFLAG_AREA_ADDRS; | |
726 | expected |= TLVFLAG_LAN_NEIGHS; | |
727 | expected |= TLVFLAG_NLPID; | |
728 | expected |= TLVFLAG_IPV4_ADDR; | |
729 | expected |= TLVFLAG_IPV6_ADDR; | |
730 | ||
731 | retval = parse_tlvs (circuit->area->area_tag, | |
f390d2c7 | 732 | STREAM_PNT (circuit->rcv_stream), |
733 | hdr.pdu_len - ISIS_LANHELLO_HDRLEN - | |
734 | ISIS_FIXED_HDR_LEN, &expected, &found, &tlvs); | |
eb5d44eb | 735 | |
f390d2c7 | 736 | if (retval > ISIS_WARNING) |
737 | { | |
738 | zlog_warn ("parse_tlvs() failed"); | |
739 | goto out; | |
740 | } | |
eb5d44eb | 741 | |
f390d2c7 | 742 | if (!(found & TLVFLAG_AREA_ADDRS)) |
743 | { | |
744 | zlog_warn ("No Area addresses TLV in Level %d LAN IS to IS hello", | |
745 | level); | |
eb5d44eb | 746 | retval = ISIS_WARNING; |
747 | goto out; | |
748 | } | |
f390d2c7 | 749 | |
750 | if (circuit->passwd.type) | |
751 | { | |
752 | if (!(found & TLVFLAG_AUTH_INFO) || | |
753 | authentication_check (&circuit->passwd, &tlvs.auth_info)) | |
754 | { | |
755 | isis_event_auth_failure (circuit->area->area_tag, | |
756 | "LAN hello authentication failure", | |
757 | hdr.source_id); | |
758 | retval = ISIS_WARNING; | |
759 | goto out; | |
760 | } | |
761 | } | |
eb5d44eb | 762 | |
763 | /* | |
764 | * Accept the level 1 adjacency only if a match between local and | |
765 | * remote area addresses is found | |
766 | */ | |
f390d2c7 | 767 | if (level == 1 && !area_match (circuit->area->area_addrs, tlvs.area_addrs)) |
768 | { | |
769 | if (isis->debugs & DEBUG_ADJ_PACKETS) | |
770 | { | |
529d65b3 | 771 | zlog_debug ("ISIS-Adj (%s): Area mismatch, level %d IIH on %s", |
772 | circuit->area->area_tag, level, | |
773 | circuit->interface->name); | |
f390d2c7 | 774 | } |
775 | retval = ISIS_OK; | |
776 | goto out; | |
eb5d44eb | 777 | } |
eb5d44eb | 778 | |
779 | /* | |
780 | * it's own IIH PDU - discard silently | |
f390d2c7 | 781 | */ |
782 | if (!memcmp (circuit->u.bc.snpa, ssnpa, ETH_ALEN)) | |
783 | { | |
529d65b3 | 784 | zlog_debug ("ISIS-Adj (%s): it's own IIH PDU - discarded", |
785 | circuit->area->area_tag); | |
eb5d44eb | 786 | |
f390d2c7 | 787 | retval = ISIS_OK; |
788 | goto out; | |
789 | } | |
eb5d44eb | 790 | |
791 | /* | |
792 | * check if it's own interface ip match iih ip addrs | |
793 | */ | |
f390d2c7 | 794 | if (!(found & TLVFLAG_IPV4_ADDR) |
795 | || !ip_match (circuit->ip_addrs, tlvs.ipv4_addrs)) | |
796 | { | |
529d65b3 | 797 | zlog_debug |
f390d2c7 | 798 | ("ISIS-Adj: No usable IP interface addresses in LAN IIH from %s\n", |
799 | circuit->interface->name); | |
800 | retval = ISIS_WARNING; | |
801 | goto out; | |
802 | } | |
eb5d44eb | 803 | |
804 | adj = isis_adj_lookup (hdr.source_id, circuit->u.bc.adjdb[level - 1]); | |
f390d2c7 | 805 | if (!adj) |
806 | { | |
807 | /* | |
808 | * Do as in 8.4.2.5 | |
809 | */ | |
810 | adj = isis_new_adj (hdr.source_id, ssnpa, level, circuit); | |
811 | if (adj == NULL) | |
13c48f72 | 812 | { |
813 | retval = ISIS_ERROR; | |
814 | goto out; | |
815 | } | |
eb5d44eb | 816 | |
f390d2c7 | 817 | adj->level = level; |
818 | isis_adj_state_change (adj, ISIS_ADJ_INITIALIZING, NULL); | |
eb5d44eb | 819 | |
f390d2c7 | 820 | if (level == 1) |
821 | { | |
822 | adj->sys_type = ISIS_SYSTYPE_L1_IS; | |
823 | } | |
824 | else | |
825 | { | |
826 | adj->sys_type = ISIS_SYSTYPE_L2_IS; | |
827 | } | |
828 | list_delete_all_node (circuit->u.bc.lan_neighs[level - 1]); | |
829 | isis_adj_build_neigh_list (circuit->u.bc.adjdb[level - 1], | |
830 | circuit->u.bc.lan_neighs[level - 1]); | |
eb5d44eb | 831 | } |
eb5d44eb | 832 | |
a211d65d | 833 | if(adj->dis_record[level-1].dis==ISIS_IS_DIS) |
834 | switch (level) | |
835 | { | |
836 | case 1: | |
837 | if (memcmp (circuit->u.bc.l1_desig_is, hdr.lan_id, ISIS_SYS_ID_LEN + 1)) | |
838 | { | |
839 | thread_add_event (master, isis_event_dis_status_change, circuit, 0); | |
64a7afd6 | 840 | memcpy (&circuit->u.bc.l1_desig_is, hdr.lan_id, |
841 | ISIS_SYS_ID_LEN + 1); | |
a211d65d | 842 | } |
843 | break; | |
844 | case 2: | |
845 | if (memcmp (circuit->u.bc.l2_desig_is, hdr.lan_id, ISIS_SYS_ID_LEN + 1)) | |
846 | { | |
847 | thread_add_event (master, isis_event_dis_status_change, circuit, 0); | |
64a7afd6 | 848 | memcpy (&circuit->u.bc.l2_desig_is, hdr.lan_id, |
849 | ISIS_SYS_ID_LEN + 1); | |
a211d65d | 850 | } |
851 | break; | |
852 | } | |
eb5d44eb | 853 | |
854 | adj->hold_time = hdr.hold_time; | |
f390d2c7 | 855 | adj->last_upd = time (NULL); |
856 | adj->prio[level - 1] = hdr.prio; | |
eb5d44eb | 857 | |
858 | memcpy (adj->lanid, hdr.lan_id, ISIS_SYS_ID_LEN + 1); | |
859 | ||
860 | /* which protocol are spoken ??? */ | |
f390d2c7 | 861 | if (found & TLVFLAG_NLPID) |
eb5d44eb | 862 | tlvs_to_adj_nlpids (&tlvs, adj); |
863 | ||
864 | /* we need to copy addresses to the adj */ | |
f390d2c7 | 865 | if (found & TLVFLAG_IPV4_ADDR) |
eb5d44eb | 866 | tlvs_to_adj_ipv4_addrs (&tlvs, adj); |
867 | ||
868 | #ifdef HAVE_IPV6 | |
f390d2c7 | 869 | if (found & TLVFLAG_IPV6_ADDR) |
eb5d44eb | 870 | tlvs_to_adj_ipv6_addrs (&tlvs, adj); |
871 | #endif /* HAVE_IPV6 */ | |
872 | ||
873 | adj->circuit_t = hdr.circuit_t; | |
874 | ||
875 | /* lets take care of the expiry */ | |
f390d2c7 | 876 | THREAD_TIMER_OFF (adj->t_expire); |
877 | THREAD_TIMER_ON (master, adj->t_expire, isis_adj_expire, adj, | |
878 | (long) adj->hold_time); | |
eb5d44eb | 879 | |
880 | /* | |
881 | * If the snpa for this circuit is found from LAN Neighbours TLV | |
882 | * we have two-way communication -> adjacency can be put to state "up" | |
883 | */ | |
884 | ||
f390d2c7 | 885 | if (found & TLVFLAG_LAN_NEIGHS) |
886 | { | |
887 | if (adj->adj_state != ISIS_ADJ_UP) | |
888 | { | |
1eb8ef25 | 889 | for (ALL_LIST_ELEMENTS (tlvs.lan_neighs, node, nnode, snpa)) |
f390d2c7 | 890 | if (!memcmp (snpa, circuit->u.bc.snpa, ETH_ALEN)) |
891 | { | |
892 | isis_adj_state_change (adj, ISIS_ADJ_UP, | |
893 | "own SNPA found in LAN Neighbours TLV"); | |
894 | } | |
895 | } | |
eb5d44eb | 896 | } |
eb5d44eb | 897 | |
f390d2c7 | 898 | out: |
eb5d44eb | 899 | /* DEBUG_ADJ_PACKETS */ |
f390d2c7 | 900 | if (isis->debugs & DEBUG_ADJ_PACKETS) |
901 | { | |
902 | /* FIXME: is this place right? fix missing info */ | |
529d65b3 | 903 | zlog_debug ("ISIS-Adj (%s): Rcvd L%d LAN IIH from %s on %s, cirType %s, " |
904 | "cirID %u, length %ld", | |
905 | circuit->area->area_tag, | |
906 | level, snpa_print (ssnpa), circuit->interface->name, | |
907 | circuit_t2string (circuit->circuit_is_type), | |
908 | circuit->circuit_id, stream_get_endp (circuit->rcv_stream)); | |
f390d2c7 | 909 | } |
eb5d44eb | 910 | |
911 | free_tlvs (&tlvs); | |
912 | ||
913 | return retval; | |
914 | } | |
915 | ||
916 | /* | |
917 | * Process Level 1/2 Link State | |
918 | * ISO - 10589 | |
919 | * Section 7.3.15.1 - Action on receipt of a link state PDU | |
f390d2c7 | 920 | */ |
921 | static int | |
922 | process_lsp (int level, struct isis_circuit *circuit, u_char * ssnpa) | |
eb5d44eb | 923 | { |
924 | struct isis_link_state_hdr *hdr; | |
925 | struct isis_adjacency *adj = NULL; | |
926 | struct isis_lsp *lsp, *lsp0 = NULL; | |
927 | int retval = ISIS_OK, comp = 0; | |
928 | u_char lspid[ISIS_SYS_ID_LEN + 2]; | |
929 | struct isis_passwd *passwd; | |
930 | ||
931 | /* Sanity check - FIXME: move to correct place */ | |
f390d2c7 | 932 | if ((stream_get_endp (circuit->rcv_stream) - |
933 | stream_get_getp (circuit->rcv_stream)) < ISIS_LSP_HDR_LEN) | |
934 | { | |
935 | zlog_warn ("Packet too short"); | |
936 | return ISIS_WARNING; | |
937 | } | |
eb5d44eb | 938 | |
939 | /* Reference the header */ | |
f390d2c7 | 940 | hdr = (struct isis_link_state_hdr *) STREAM_PNT (circuit->rcv_stream); |
941 | ||
942 | if (isis->debugs & DEBUG_UPDATE_PACKETS) | |
943 | { | |
529d65b3 | 944 | zlog_debug ("ISIS-Upd (%s): Rcvd L%d LSP %s, seq 0x%08x, cksum 0x%04x, " |
945 | "lifetime %us, len %lu, on %s", | |
946 | circuit->area->area_tag, | |
947 | level, | |
948 | rawlspid_print (hdr->lsp_id), | |
949 | ntohl (hdr->seq_num), | |
950 | ntohs (hdr->checksum), | |
951 | ntohs (hdr->rem_lifetime), | |
952 | circuit->rcv_stream->endp, circuit->interface->name); | |
f390d2c7 | 953 | } |
eb5d44eb | 954 | |
955 | assert (ntohs (hdr->pdu_len) > ISIS_LSP_HDR_LEN); | |
956 | ||
957 | /* Checksum sanity check - FIXME: move to correct place */ | |
958 | /* 12 = sysid+pdu+remtime */ | |
f390d2c7 | 959 | if (iso_csum_verify (STREAM_PNT (circuit->rcv_stream) + 4, |
960 | ntohs (hdr->pdu_len) - 12, &hdr->checksum)) | |
961 | { | |
529d65b3 | 962 | zlog_debug ("ISIS-Upd (%s): LSP %s invalid LSP checksum 0x%04x", |
963 | circuit->area->area_tag, | |
964 | rawlspid_print (hdr->lsp_id), ntohs (hdr->checksum)); | |
f390d2c7 | 965 | |
966 | return ISIS_WARNING; | |
967 | } | |
eb5d44eb | 968 | |
969 | /* 7.3.15.1 a) 1 - external domain circuit will discard lsps */ | |
f390d2c7 | 970 | if (circuit->ext_domain) |
971 | { | |
529d65b3 | 972 | zlog_debug |
f390d2c7 | 973 | ("ISIS-Upd (%s): LSP %s received at level %d over circuit with " |
974 | "externalDomain = true", circuit->area->area_tag, | |
975 | rawlspid_print (hdr->lsp_id), level); | |
976 | ||
977 | return ISIS_WARNING; | |
978 | } | |
eb5d44eb | 979 | |
980 | /* 7.3.15.1 a) 2,3 - manualL2OnlyMode not implemented */ | |
f390d2c7 | 981 | if (!accept_level (level, circuit->circuit_is_type)) |
982 | { | |
529d65b3 | 983 | zlog_debug ("ISIS-Upd (%s): LSP %s received at level %d over circuit of" |
984 | " type %s", | |
985 | circuit->area->area_tag, | |
986 | rawlspid_print (hdr->lsp_id), | |
987 | level, circuit_t2string (circuit->circuit_is_type)); | |
f390d2c7 | 988 | |
989 | return ISIS_WARNING; | |
990 | } | |
eb5d44eb | 991 | |
992 | /* 7.3.15.1 a) 4 - need to make sure IDLength matches */ | |
993 | ||
994 | /* 7.3.15.1 a) 5 - maximum area match, can be ommited since we only use 3 */ | |
995 | ||
996 | /* 7.3.15.1 a) 7 - password check */ | |
997 | (level == ISIS_LEVEL1) ? (passwd = &circuit->area->area_passwd) : | |
998 | (passwd = &circuit->area->domain_passwd); | |
f390d2c7 | 999 | if (passwd->type) |
1000 | { | |
1001 | if (isis_lsp_authinfo_check (circuit->rcv_stream, circuit->area, | |
1002 | ntohs (hdr->pdu_len), passwd)) | |
1003 | { | |
1004 | isis_event_auth_failure (circuit->area->area_tag, | |
1005 | "LSP authentication failure", hdr->lsp_id); | |
1006 | return ISIS_WARNING; | |
1007 | } | |
eb5d44eb | 1008 | } |
eb5d44eb | 1009 | /* Find the LSP in our database and compare it to this Link State header */ |
1010 | lsp = lsp_search (hdr->lsp_id, circuit->area->lspdb[level - 1]); | |
1011 | if (lsp) | |
f390d2c7 | 1012 | comp = lsp_compare (circuit->area->area_tag, lsp, hdr->seq_num, |
1013 | hdr->checksum, hdr->rem_lifetime); | |
1014 | if (lsp && (lsp->own_lsp | |
eb5d44eb | 1015 | #ifdef TOPOLOGY_GENERATE |
f390d2c7 | 1016 | || lsp->from_topology |
eb5d44eb | 1017 | #endif /* TOPOLOGY_GENERATE */ |
f390d2c7 | 1018 | )) |
eb5d44eb | 1019 | goto dontcheckadj; |
1020 | ||
1021 | /* 7.3.15.1 a) 6 - Must check that we have an adjacency of the same level */ | |
1022 | /* for broadcast circuits, snpa should be compared */ | |
1023 | /* FIXME : Point To Point */ | |
1024 | ||
f390d2c7 | 1025 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) |
1026 | { | |
1027 | adj = isis_adj_lookup_snpa (ssnpa, circuit->u.bc.adjdb[level - 1]); | |
1028 | if (!adj) | |
1029 | { | |
529d65b3 | 1030 | zlog_debug ("(%s): DS ======= LSP %s, seq 0x%08x, cksum 0x%04x, " |
1031 | "lifetime %us on %s", | |
1032 | circuit->area->area_tag, | |
1033 | rawlspid_print (hdr->lsp_id), | |
1034 | ntohl (hdr->seq_num), | |
1035 | ntohs (hdr->checksum), | |
1036 | ntohs (hdr->rem_lifetime), circuit->interface->name); | |
f390d2c7 | 1037 | return ISIS_WARNING; /* Silently discard */ |
1038 | } | |
eb5d44eb | 1039 | } |
eb5d44eb | 1040 | |
1041 | /* for non broadcast, we just need to find same level adj */ | |
f390d2c7 | 1042 | else |
1043 | { | |
1044 | /* If no adj, or no sharing of level */ | |
1045 | if (!circuit->u.p2p.neighbor) | |
1046 | { | |
1047 | return ISIS_OK; /* Silently discard */ | |
1048 | } | |
1049 | else | |
1050 | { | |
1051 | if (((level == 1) && | |
1052 | (circuit->u.p2p.neighbor->adj_usage == ISIS_ADJ_LEVEL2)) || | |
1053 | ((level == 2) && | |
1054 | (circuit->u.p2p.neighbor->adj_usage == ISIS_ADJ_LEVEL1))) | |
1055 | return ISIS_WARNING; /* Silently discard */ | |
1056 | } | |
eb5d44eb | 1057 | } |
f390d2c7 | 1058 | dontcheckadj: |
eb5d44eb | 1059 | /* 7.3.15.1 a) 7 - Passwords for level 1 - not implemented */ |
1060 | ||
1061 | /* 7.3.15.1 a) 8 - Passwords for level 2 - not implemented */ | |
1062 | ||
f390d2c7 | 1063 | /* 7.3.15.1 a) 9 - OriginatingLSPBufferSize - not implemented FIXME: do it */ |
1064 | ||
1065 | /* 7.3.15.1 b) - If the remaining life time is 0, we perform 7.3.16.4 */ | |
1066 | if (hdr->rem_lifetime == 0) | |
1067 | { | |
1068 | if (!lsp) | |
1069 | { | |
1070 | /* 7.3.16.4 a) 1) No LSP in db -> send an ack, but don't save */ | |
1071 | /* only needed on explicit update, eg - p2p */ | |
1072 | if (circuit->circ_type == CIRCUIT_T_P2P) | |
1073 | ack_lsp (hdr, circuit, level); | |
1074 | return retval; /* FIXME: do we need a purge? */ | |
1075 | } | |
1076 | else | |
1077 | { | |
1078 | if (memcmp (hdr->lsp_id, isis->sysid, ISIS_SYS_ID_LEN)) | |
1079 | { | |
1080 | /* LSP by some other system -> do 7.3.16.4 b) */ | |
1081 | /* 7.3.16.4 b) 1) */ | |
1082 | if (comp == LSP_NEWER) | |
1083 | { | |
1084 | lsp_update (lsp, hdr, circuit->rcv_stream, circuit->area); | |
1085 | /* ii */ | |
1086 | ISIS_FLAGS_SET_ALL (lsp->SRMflags); | |
1087 | /* iii */ | |
1088 | ISIS_CLEAR_FLAG (lsp->SRMflags, circuit); | |
1089 | /* v */ | |
1090 | ISIS_FLAGS_CLEAR_ALL (lsp->SSNflags); /* FIXME: OTHER than c */ | |
1091 | /* iv */ | |
1092 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
1093 | ISIS_SET_FLAG (lsp->SSNflags, circuit); | |
1094 | ||
1095 | } /* 7.3.16.4 b) 2) */ | |
1096 | else if (comp == LSP_EQUAL) | |
1097 | { | |
1098 | /* i */ | |
1099 | ISIS_CLEAR_FLAG (lsp->SRMflags, circuit); | |
1100 | /* ii */ | |
1101 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
1102 | ISIS_SET_FLAG (lsp->SSNflags, circuit); | |
1103 | } /* 7.3.16.4 b) 3) */ | |
1104 | else | |
1105 | { | |
1106 | ISIS_SET_FLAG (lsp->SRMflags, circuit); | |
1107 | ISIS_CLEAR_FLAG (lsp->SSNflags, circuit); | |
1108 | } | |
1109 | } | |
1110 | else | |
1111 | { | |
1112 | /* our own LSP -> 7.3.16.4 c) */ | |
1113 | if (LSP_PSEUDO_ID (lsp->lsp_header->lsp_id) != | |
1114 | circuit->circuit_id | |
1115 | || (LSP_PSEUDO_ID (lsp->lsp_header->lsp_id) == | |
1116 | circuit->circuit_id | |
1117 | && circuit->u.bc.is_dr[level - 1] == 1)) | |
1118 | { | |
1119 | lsp->lsp_header->seq_num = htonl (ntohl (hdr->seq_num) + 1); | |
529d65b3 | 1120 | zlog_debug ("LSP LEN: %d", ntohs (lsp->lsp_header->pdu_len)); |
f390d2c7 | 1121 | iso_csum_create (STREAM_DATA (lsp->pdu) + 12, |
1122 | ntohs (lsp->lsp_header->pdu_len) - 12, 12); | |
1123 | ISIS_FLAGS_SET_ALL (lsp->SRMflags); | |
529d65b3 | 1124 | zlog_debug |
f390d2c7 | 1125 | ("ISIS-Upd (%s): (1) re-originating LSP %s new seq 0x%08x", |
1126 | circuit->area->area_tag, rawlspid_print (hdr->lsp_id), | |
1127 | ntohl (lsp->lsp_header->seq_num)); | |
1128 | lsp->lsp_header->rem_lifetime = | |
1129 | htons (isis_jitter | |
1130 | (circuit->area->max_lsp_lifetime[level - 1], | |
1131 | MAX_AGE_JITTER)); | |
1132 | } | |
1133 | else | |
1134 | { | |
1135 | /* Got purge for own pseudo-lsp, and we are not DR */ | |
1136 | lsp_purge_dr (lsp->lsp_header->lsp_id, circuit, level); | |
1137 | } | |
1138 | } | |
1139 | } | |
1140 | return retval; | |
eb5d44eb | 1141 | } |
eb5d44eb | 1142 | /* 7.3.15.1 c) - If this is our own lsp and we don't have it initiate a |
1143 | * purge */ | |
f390d2c7 | 1144 | if (memcmp (hdr->lsp_id, isis->sysid, ISIS_SYS_ID_LEN) == 0) |
1145 | { | |
1146 | if (!lsp) | |
1147 | { | |
1148 | /* 7.3.16.4: initiate a purge */ | |
1149 | lsp_purge_non_exist (hdr, circuit->area); | |
1150 | return ISIS_OK; | |
1151 | } | |
1152 | /* 7.3.15.1 d) - If this is our own lsp and we have it */ | |
1153 | ||
1154 | /* In 7.3.16.1, If an Intermediate system R somewhere in the domain | |
1155 | * has information that the current sequence number for source S is | |
1156 | * "greater" than that held by S, ... */ | |
1157 | ||
1158 | else if (ntohl (hdr->seq_num) > ntohl (lsp->lsp_header->seq_num)) | |
1159 | { | |
1160 | /* 7.3.16.1 */ | |
1161 | lsp->lsp_header->seq_num = htonl (ntohl (hdr->seq_num) + 1); | |
1162 | ||
1163 | iso_csum_create (STREAM_DATA (lsp->pdu) + 12, | |
1164 | ntohs (lsp->lsp_header->pdu_len) - 12, 12); | |
1165 | ||
1166 | ISIS_FLAGS_SET_ALL (lsp->SRMflags); | |
529d65b3 | 1167 | zlog_debug |
f390d2c7 | 1168 | ("ISIS-Upd (%s): (2) re-originating LSP %s new seq 0x%08x", |
1169 | circuit->area->area_tag, rawlspid_print (hdr->lsp_id), | |
1170 | ntohl (lsp->lsp_header->seq_num)); | |
1171 | lsp->lsp_header->rem_lifetime = | |
1172 | htons (isis_jitter | |
1173 | (circuit->area->max_lsp_lifetime[level - 1], | |
1174 | MAX_AGE_JITTER)); | |
1175 | } | |
eb5d44eb | 1176 | } |
f390d2c7 | 1177 | else |
1178 | { | |
1179 | /* 7.3.15.1 e) - This lsp originated on another system */ | |
1180 | ||
1181 | /* 7.3.15.1 e) 1) LSP newer than the one in db or no LSP in db */ | |
1182 | if ((!lsp || comp == LSP_NEWER)) | |
1183 | { | |
1184 | /* i */ | |
1185 | if (lsp) | |
1186 | { | |
eb5d44eb | 1187 | #ifdef EXTREME_DEBUG |
529d65b3 | 1188 | zlog_debug ("level %d number is - %ld", level, |
1189 | circuit->area->lspdb[level - 1]->dict_nodecount); | |
eb5d44eb | 1190 | #endif /* EXTREME DEBUG */ |
f390d2c7 | 1191 | lsp_search_and_destroy (hdr->lsp_id, |
1192 | circuit->area->lspdb[level - 1]); | |
1193 | /* exists, so we overwrite */ | |
eb5d44eb | 1194 | #ifdef EXTREME_DEBUG |
529d65b3 | 1195 | zlog_debug ("level %d number is - %ld", level, |
1196 | circuit->area->lspdb[level - 1]->dict_nodecount); | |
eb5d44eb | 1197 | #endif /* EXTREME DEBUG */ |
f390d2c7 | 1198 | } |
1199 | /* | |
1200 | * If this lsp is a frag, need to see if we have zero lsp present | |
1201 | */ | |
1202 | if (LSP_FRAGMENT (hdr->lsp_id) != 0) | |
1203 | { | |
1204 | memcpy (lspid, hdr->lsp_id, ISIS_SYS_ID_LEN + 1); | |
1205 | LSP_FRAGMENT (lspid) = 0; | |
1206 | lsp0 = lsp_search (lspid, circuit->area->lspdb[level - 1]); | |
1207 | if (!lsp0) | |
1208 | { | |
529d65b3 | 1209 | zlog_debug ("Got lsp frag, while zero lsp not database"); |
f390d2c7 | 1210 | return ISIS_OK; |
1211 | } | |
1212 | } | |
1213 | lsp = | |
1214 | lsp_new_from_stream_ptr (circuit->rcv_stream, | |
1215 | ntohs (hdr->pdu_len), lsp0, | |
1216 | circuit->area); | |
1217 | lsp->level = level; | |
1218 | lsp->adj = adj; | |
1219 | lsp_insert (lsp, circuit->area->lspdb[level - 1]); | |
1220 | /* ii */ | |
1221 | ISIS_FLAGS_SET_ALL (lsp->SRMflags); | |
1222 | /* iii */ | |
1223 | ISIS_CLEAR_FLAG (lsp->SRMflags, circuit); | |
1224 | ||
1225 | /* iv */ | |
1226 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
1227 | ISIS_SET_FLAG (lsp->SSNflags, circuit); | |
1228 | /* FIXME: v) */ | |
1229 | } | |
1230 | /* 7.3.15.1 e) 2) LSP equal to the one in db */ | |
1231 | else if (comp == LSP_EQUAL) | |
1232 | { | |
1233 | ISIS_CLEAR_FLAG (lsp->SRMflags, circuit); | |
1234 | lsp_update (lsp, hdr, circuit->rcv_stream, circuit->area); | |
1235 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
1236 | { | |
1237 | ISIS_SET_FLAG (lsp->SSNflags, circuit); | |
1238 | } | |
1239 | } | |
1240 | /* 7.3.15.1 e) 3) LSP older than the one in db */ | |
1241 | else | |
1242 | { | |
1243 | ISIS_SET_FLAG (lsp->SRMflags, circuit); | |
1244 | ISIS_CLEAR_FLAG (lsp->SSNflags, circuit); | |
1245 | } | |
eb5d44eb | 1246 | } |
eb5d44eb | 1247 | if (lsp) |
1248 | lsp->adj = adj; | |
1249 | return retval; | |
1250 | } | |
1251 | ||
1252 | /* | |
1253 | * Process Sequence Numbers | |
1254 | * ISO - 10589 | |
1255 | * Section 7.3.15.2 - Action on receipt of a sequence numbers PDU | |
1256 | */ | |
1257 | ||
92365889 | 1258 | static int |
f390d2c7 | 1259 | process_snp (int snp_type, int level, struct isis_circuit *circuit, |
1260 | u_char * ssnpa) | |
eb5d44eb | 1261 | { |
1262 | int retval = ISIS_OK; | |
1263 | int cmp, own_lsp; | |
1264 | char typechar = ' '; | |
1265 | int len; | |
1266 | struct isis_adjacency *adj; | |
1267 | struct isis_complete_seqnum_hdr *chdr = NULL; | |
1268 | struct isis_partial_seqnum_hdr *phdr = NULL; | |
1269 | uint32_t found = 0, expected = 0; | |
1270 | struct isis_lsp *lsp; | |
1271 | struct lsp_entry *entry; | |
1eb8ef25 | 1272 | struct listnode *node, *nnode; |
1273 | struct listnode *node2, *nnode2; | |
eb5d44eb | 1274 | struct tlvs tlvs; |
1275 | struct list *lsp_list = NULL; | |
1276 | struct isis_passwd *passwd; | |
1277 | ||
f390d2c7 | 1278 | if (snp_type == ISIS_SNP_CSNP_FLAG) |
1279 | { | |
1280 | /* getting the header info */ | |
1281 | typechar = 'C'; | |
1282 | chdr = | |
1283 | (struct isis_complete_seqnum_hdr *) STREAM_PNT (circuit->rcv_stream); | |
1284 | circuit->rcv_stream->getp += ISIS_CSNP_HDRLEN; | |
1285 | len = ntohs (chdr->pdu_len); | |
1286 | if (len < ISIS_CSNP_HDRLEN) | |
1287 | { | |
1288 | zlog_warn ("Received a CSNP with bogus length!"); | |
1289 | return ISIS_OK; | |
1290 | } | |
eb5d44eb | 1291 | } |
f390d2c7 | 1292 | else |
1293 | { | |
1294 | typechar = 'P'; | |
1295 | phdr = | |
1296 | (struct isis_partial_seqnum_hdr *) STREAM_PNT (circuit->rcv_stream); | |
1297 | circuit->rcv_stream->getp += ISIS_PSNP_HDRLEN; | |
1298 | len = ntohs (phdr->pdu_len); | |
1299 | if (len < ISIS_PSNP_HDRLEN) | |
1300 | { | |
1301 | zlog_warn ("Received a CSNP with bogus length!"); | |
1302 | return ISIS_OK; | |
1303 | } | |
eb5d44eb | 1304 | } |
eb5d44eb | 1305 | |
1306 | /* 7.3.15.2 a) 1 - external domain circuit will discard snp pdu */ | |
f390d2c7 | 1307 | if (circuit->ext_domain) |
1308 | { | |
eb5d44eb | 1309 | |
529d65b3 | 1310 | zlog_debug ("ISIS-Snp (%s): Rcvd L%d %cSNP on %s, " |
1311 | "skipping: circuit externalDomain = true", | |
1312 | circuit->area->area_tag, | |
1313 | level, typechar, circuit->interface->name); | |
eb5d44eb | 1314 | |
f390d2c7 | 1315 | return ISIS_OK; |
1316 | } | |
eb5d44eb | 1317 | |
1318 | /* 7.3.15.2 a) 2,3 - manualL2OnlyMode not implemented */ | |
f390d2c7 | 1319 | if (!accept_level (level, circuit->circuit_is_type)) |
1320 | { | |
eb5d44eb | 1321 | |
529d65b3 | 1322 | zlog_debug ("ISIS-Snp (%s): Rcvd L%d %cSNP on %s, " |
1323 | "skipping: circuit type %s does not match level %d", | |
1324 | circuit->area->area_tag, | |
1325 | level, | |
1326 | typechar, | |
1327 | circuit->interface->name, | |
1328 | circuit_t2string (circuit->circuit_is_type), level); | |
eb5d44eb | 1329 | |
1330 | return ISIS_OK; | |
1331 | } | |
f390d2c7 | 1332 | |
1333 | /* 7.3.15.2 a) 4 - not applicable for CSNP only PSNPs on broadcast */ | |
1334 | if ((snp_type == ISIS_SNP_PSNP_FLAG) && | |
1335 | (circuit->circ_type == CIRCUIT_T_BROADCAST)) | |
1336 | { | |
1337 | if (!circuit->u.bc.is_dr[level - 1]) | |
1338 | { | |
1339 | ||
529d65b3 | 1340 | zlog_debug ("ISIS-Snp (%s): Rcvd L%d %cSNP from %s on %s, " |
1341 | "skipping: we are not the DIS", | |
1342 | circuit->area->area_tag, | |
1343 | level, | |
1344 | typechar, snpa_print (ssnpa), circuit->interface->name); | |
f390d2c7 | 1345 | |
1346 | return ISIS_OK; | |
1347 | } | |
1348 | } | |
eb5d44eb | 1349 | |
1350 | /* 7.3.15.2 a) 5 - need to make sure IDLength matches - already checked */ | |
1351 | ||
1352 | /* 7.3.15.2 a) 6 - maximum area match, can be ommited since we only use 3 | |
1353 | * - already checked */ | |
1354 | ||
1355 | /* 7.3.15.2 a) 7 - Must check that we have an adjacency of the same level */ | |
1356 | /* for broadcast circuits, snpa should be compared */ | |
1357 | /* FIXME : Do we need to check SNPA? */ | |
f390d2c7 | 1358 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) |
1359 | { | |
1360 | if (snp_type == ISIS_SNP_CSNP_FLAG) | |
1361 | { | |
1362 | adj = | |
1363 | isis_adj_lookup (chdr->source_id, circuit->u.bc.adjdb[level - 1]); | |
1364 | } | |
1365 | else | |
1366 | { | |
1367 | /* a psnp on a broadcast, how lovely of Juniper :) */ | |
1368 | adj = | |
1369 | isis_adj_lookup (phdr->source_id, circuit->u.bc.adjdb[level - 1]); | |
1370 | } | |
1371 | if (!adj) | |
1372 | return ISIS_OK; /* Silently discard */ | |
1373 | } | |
1374 | else | |
1375 | { | |
1376 | if (!circuit->u.p2p.neighbor) | |
1377 | return ISIS_OK; /* Silently discard */ | |
1378 | } | |
eb5d44eb | 1379 | |
1380 | /* 7.3.15.2 a) 8 - Passwords for level 1 - not implemented */ | |
1381 | ||
1382 | /* 7.3.15.2 a) 9 - Passwords for level 2 - not implemented */ | |
1383 | ||
1384 | memset (&tlvs, 0, sizeof (struct tlvs)); | |
1385 | ||
1386 | /* parse the SNP */ | |
1387 | expected |= TLVFLAG_LSP_ENTRIES; | |
1388 | expected |= TLVFLAG_AUTH_INFO; | |
1389 | retval = parse_tlvs (circuit->area->area_tag, | |
f390d2c7 | 1390 | STREAM_PNT (circuit->rcv_stream), |
eb5d44eb | 1391 | len - circuit->rcv_stream->getp, |
f390d2c7 | 1392 | &expected, &found, &tlvs); |
eb5d44eb | 1393 | |
f390d2c7 | 1394 | if (retval > ISIS_WARNING) |
1395 | { | |
1396 | zlog_warn ("something went very wrong processing SNP"); | |
1397 | free_tlvs (&tlvs); | |
1398 | return retval; | |
1399 | } | |
eb5d44eb | 1400 | |
1cbc562b | 1401 | if (level == 1) |
1402 | passwd = &circuit->area->area_passwd; | |
1403 | else | |
1404 | passwd = &circuit->area->domain_passwd; | |
1405 | ||
1406 | if (CHECK_FLAG(passwd->snp_auth, SNP_AUTH_RECV)) | |
f390d2c7 | 1407 | { |
1cbc562b | 1408 | if (passwd->type) |
f390d2c7 | 1409 | { |
1cbc562b | 1410 | if (!(found & TLVFLAG_AUTH_INFO) || |
1411 | authentication_check (passwd, &tlvs.auth_info)) | |
1412 | { | |
1413 | isis_event_auth_failure (circuit->area->area_tag, | |
1414 | "SNP authentication" " failure", | |
1415 | phdr ? phdr->source_id : chdr->source_id); | |
1416 | return ISIS_OK; | |
1417 | } | |
f390d2c7 | 1418 | } |
1419 | } | |
eb5d44eb | 1420 | |
1421 | /* debug isis snp-packets */ | |
f390d2c7 | 1422 | if (isis->debugs & DEBUG_SNP_PACKETS) |
1423 | { | |
529d65b3 | 1424 | zlog_debug ("ISIS-Snp (%s): Rcvd L%d %cSNP from %s on %s", |
1425 | circuit->area->area_tag, | |
1426 | level, | |
1427 | typechar, snpa_print (ssnpa), circuit->interface->name); | |
f390d2c7 | 1428 | if (tlvs.lsp_entries) |
1429 | { | |
1eb8ef25 | 1430 | for (ALL_LIST_ELEMENTS (tlvs.lsp_entries, node, nnode, entry)) |
f390d2c7 | 1431 | { |
529d65b3 | 1432 | zlog_debug ("ISIS-Snp (%s): %cSNP entry %s, seq 0x%08x," |
1433 | " cksum 0x%04x, lifetime %us", | |
1434 | circuit->area->area_tag, | |
1435 | typechar, | |
1436 | rawlspid_print (entry->lsp_id), | |
1437 | ntohl (entry->seq_num), | |
1438 | ntohs (entry->checksum), ntohs (entry->rem_lifetime)); | |
f390d2c7 | 1439 | } |
1440 | } | |
eb5d44eb | 1441 | } |
eb5d44eb | 1442 | |
1443 | /* 7.3.15.2 b) Actions on LSP_ENTRIES reported */ | |
f390d2c7 | 1444 | if (tlvs.lsp_entries) |
1445 | { | |
1eb8ef25 | 1446 | for (ALL_LIST_ELEMENTS (tlvs.lsp_entries, node, nnode, entry)) |
f390d2c7 | 1447 | { |
1448 | lsp = lsp_search (entry->lsp_id, circuit->area->lspdb[level - 1]); | |
1449 | own_lsp = !memcmp (entry->lsp_id, isis->sysid, ISIS_SYS_ID_LEN); | |
1450 | if (lsp) | |
1451 | { | |
1452 | /* 7.3.15.2 b) 1) is this LSP newer */ | |
1453 | cmp = lsp_compare (circuit->area->area_tag, lsp, entry->seq_num, | |
1454 | entry->checksum, entry->rem_lifetime); | |
1455 | /* 7.3.15.2 b) 2) if it equals, clear SRM on p2p */ | |
1456 | if (cmp == LSP_EQUAL) | |
1457 | { | |
1458 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
1459 | ISIS_CLEAR_FLAG (lsp->SRMflags, circuit); | |
1460 | /* 7.3.15.2 b) 3) if it is older, clear SSN and set SRM */ | |
1461 | } | |
1462 | else if (cmp == LSP_OLDER) | |
1463 | { | |
1464 | ISIS_CLEAR_FLAG (lsp->SSNflags, circuit); | |
1465 | ISIS_SET_FLAG (lsp->SRMflags, circuit); | |
1466 | } | |
1467 | else | |
1468 | { | |
1469 | /* 7.3.15.2 b) 4) if it is newer, set SSN and clear SRM | |
1470 | * on p2p */ | |
1471 | if (own_lsp) | |
1472 | { | |
1473 | lsp_inc_seqnum (lsp, ntohl (entry->seq_num)); | |
1474 | ISIS_SET_FLAG (lsp->SRMflags, circuit); | |
1475 | } | |
1476 | else | |
1477 | { | |
1478 | ISIS_SET_FLAG (lsp->SSNflags, circuit); | |
1479 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
1480 | ISIS_CLEAR_FLAG (lsp->SRMflags, circuit); | |
1481 | } | |
1482 | } | |
1483 | } | |
1484 | else | |
1485 | { | |
1486 | /* 7.3.15.2 b) 5) if it was not found, and all of those are not 0, | |
1487 | * insert it and set SSN on it */ | |
1488 | if (entry->rem_lifetime && entry->checksum && entry->seq_num && | |
1489 | memcmp (entry->lsp_id, isis->sysid, ISIS_SYS_ID_LEN)) | |
1490 | { | |
1491 | lsp = lsp_new (entry->lsp_id, ntohs (entry->rem_lifetime), | |
1492 | 0, 0, entry->checksum, level); | |
1493 | lsp_insert (lsp, circuit->area->lspdb[level - 1]); | |
1494 | ISIS_SET_FLAG (lsp->SSNflags, circuit); | |
1495 | } | |
1496 | } | |
eb5d44eb | 1497 | } |
1498 | } | |
eb5d44eb | 1499 | |
1500 | /* 7.3.15.2 c) on CSNP set SRM for all in range which were not reported */ | |
f390d2c7 | 1501 | if (snp_type == ISIS_SNP_CSNP_FLAG) |
1502 | { | |
1503 | /* | |
1504 | * Build a list from our own LSP db bounded with start_ and stop_lsp_id | |
1505 | */ | |
1506 | lsp_list = list_new (); | |
1507 | lsp_build_list_nonzero_ht (chdr->start_lsp_id, chdr->stop_lsp_id, | |
1508 | lsp_list, circuit->area->lspdb[level - 1]); | |
1509 | ||
1510 | /* Fixme: Find a better solution */ | |
1511 | if (tlvs.lsp_entries) | |
1512 | { | |
1eb8ef25 | 1513 | for (ALL_LIST_ELEMENTS (tlvs.lsp_entries, node, nnode, entry)) |
f390d2c7 | 1514 | { |
1eb8ef25 | 1515 | for (ALL_LIST_ELEMENTS (lsp_list, node2, nnode2, lsp)) |
f390d2c7 | 1516 | { |
1517 | if (lsp_id_cmp (lsp->lsp_header->lsp_id, entry->lsp_id) == 0) | |
1518 | { | |
1519 | list_delete_node (lsp_list, node2); | |
1520 | break; | |
1521 | } | |
1522 | } | |
1523 | } | |
1524 | } | |
1525 | /* on remaining LSPs we set SRM (neighbor knew not of) */ | |
1eb8ef25 | 1526 | for (ALL_LIST_ELEMENTS (lsp_list, node2, nnode2, lsp)) |
f390d2c7 | 1527 | { |
1528 | ISIS_SET_FLAG (lsp->SRMflags, circuit); | |
eb5d44eb | 1529 | } |
f390d2c7 | 1530 | /* lets free it */ |
1531 | list_free (lsp_list); | |
eb5d44eb | 1532 | } |
eb5d44eb | 1533 | |
1534 | free_tlvs (&tlvs); | |
1535 | return retval; | |
1536 | } | |
1537 | ||
92365889 | 1538 | static int |
f390d2c7 | 1539 | process_csnp (int level, struct isis_circuit *circuit, u_char * ssnpa) |
eb5d44eb | 1540 | { |
eb5d44eb | 1541 | /* Sanity check - FIXME: move to correct place */ |
f390d2c7 | 1542 | if ((stream_get_endp (circuit->rcv_stream) - |
1543 | stream_get_getp (circuit->rcv_stream)) < ISIS_CSNP_HDRLEN) | |
1544 | { | |
1545 | zlog_warn ("Packet too short ( < %d)", ISIS_CSNP_HDRLEN); | |
1546 | return ISIS_WARNING; | |
1547 | } | |
eb5d44eb | 1548 | |
1549 | return process_snp (ISIS_SNP_CSNP_FLAG, level, circuit, ssnpa); | |
1550 | } | |
1551 | ||
92365889 | 1552 | static int |
f390d2c7 | 1553 | process_psnp (int level, struct isis_circuit *circuit, u_char * ssnpa) |
eb5d44eb | 1554 | { |
f390d2c7 | 1555 | if ((stream_get_endp (circuit->rcv_stream) - |
1556 | stream_get_getp (circuit->rcv_stream)) < ISIS_PSNP_HDRLEN) | |
1557 | { | |
1558 | zlog_warn ("Packet too short"); | |
1559 | return ISIS_WARNING; | |
1560 | } | |
eb5d44eb | 1561 | |
1562 | return process_snp (ISIS_SNP_PSNP_FLAG, level, circuit, ssnpa); | |
1563 | } | |
1564 | ||
eb5d44eb | 1565 | /* |
1566 | * Process ISH | |
1567 | * ISO - 10589 | |
1568 | * Section 8.2.2 - Receiving ISH PDUs by an intermediate system | |
1569 | * FIXME: sample packet dump, need to figure 0x81 - looks like NLPid | |
f390d2c7 | 1570 | * 0x82 0x15 0x01 0x00 0x04 0x01 0x2c 0x59 |
1571 | * 0x38 0x08 0x47 0x00 0x01 0x00 0x02 0x00 | |
1572 | * 0x03 0x00 0x81 0x01 0xcc | |
eb5d44eb | 1573 | */ |
92365889 | 1574 | static int |
eb5d44eb | 1575 | process_is_hello (struct isis_circuit *circuit) |
1576 | { | |
1577 | struct isis_adjacency *adj; | |
1578 | int retval = ISIS_OK; | |
1579 | u_char neigh_len; | |
1580 | u_char *sysid; | |
1581 | ||
1582 | /* In this point in time we are not yet able to handle is_hellos | |
1583 | * on lan - Sorry juniper... | |
1584 | */ | |
1585 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) | |
1586 | return retval; | |
1587 | ||
1588 | neigh_len = stream_getc (circuit->rcv_stream); | |
f390d2c7 | 1589 | sysid = STREAM_PNT (circuit->rcv_stream) + neigh_len - 1 - ISIS_SYS_ID_LEN; |
eb5d44eb | 1590 | adj = circuit->u.p2p.neighbor; |
f390d2c7 | 1591 | if (!adj) |
1592 | { | |
1593 | /* 8.2.2 */ | |
f7c43dcb | 1594 | adj = isis_new_adj (sysid, (u_char *) " ", 0, circuit); |
f390d2c7 | 1595 | if (adj == NULL) |
1596 | return ISIS_ERROR; | |
eb5d44eb | 1597 | |
f390d2c7 | 1598 | isis_adj_state_change (adj, ISIS_ADJ_INITIALIZING, NULL); |
1599 | adj->sys_type = ISIS_SYSTYPE_UNKNOWN; | |
1600 | circuit->u.p2p.neighbor = adj; | |
1601 | } | |
1602 | /* 8.2.2 a) */ | |
1603 | if ((adj->adj_state == ISIS_ADJ_UP) && memcmp (adj->sysid, sysid, | |
1604 | ISIS_SYS_ID_LEN)) | |
1605 | { | |
1606 | /* 8.2.2 a) 1) FIXME: adjStateChange(down) event */ | |
1607 | /* 8.2.2 a) 2) delete the adj */ | |
1608 | XFREE (MTYPE_ISIS_ADJACENCY, adj); | |
1609 | /* 8.2.2 a) 3) create a new adj */ | |
f7c43dcb | 1610 | adj = isis_new_adj (sysid, (u_char *) " ", 0, circuit); |
f390d2c7 | 1611 | if (adj == NULL) |
1612 | return ISIS_ERROR; | |
1613 | ||
1614 | /* 8.2.2 a) 3) i */ | |
1615 | isis_adj_state_change (adj, ISIS_ADJ_INITIALIZING, NULL); | |
1616 | /* 8.2.2 a) 3) ii */ | |
1617 | adj->sys_type = ISIS_SYSTYPE_UNKNOWN; | |
1618 | /* 8.2.2 a) 4) quite meaningless */ | |
1619 | } | |
eb5d44eb | 1620 | /* 8.2.2 b) ignore on condition */ |
f390d2c7 | 1621 | if ((adj->adj_state == ISIS_ADJ_INITIALIZING) && |
1622 | (adj->sys_type == ISIS_SYSTYPE_IS)) | |
1623 | { | |
1624 | /* do nothing */ | |
1625 | } | |
1626 | else | |
1627 | { | |
1628 | /* 8.2.2 c) respond with a p2p IIH */ | |
1629 | send_hello (circuit, 1); | |
1630 | } | |
eb5d44eb | 1631 | /* 8.2.2 d) type is IS */ |
f390d2c7 | 1632 | adj->sys_type = ISIS_SYSTYPE_IS; |
eb5d44eb | 1633 | /* 8.2.2 e) FIXME: Circuit type of? */ |
1634 | ||
eb5d44eb | 1635 | return retval; |
1636 | } | |
1637 | ||
eb5d44eb | 1638 | /* |
1639 | * PDU Dispatcher | |
1640 | */ | |
1641 | ||
92365889 | 1642 | static int |
f390d2c7 | 1643 | isis_handle_pdu (struct isis_circuit *circuit, u_char * ssnpa) |
eb5d44eb | 1644 | { |
eb5d44eb | 1645 | struct isis_fixed_hdr *hdr; |
1646 | struct esis_fixed_hdr *esis_hdr; | |
1647 | ||
f390d2c7 | 1648 | int retval = ISIS_OK; |
eb5d44eb | 1649 | |
1650 | /* | |
1651 | * Let's first read data from stream to the header | |
1652 | */ | |
f390d2c7 | 1653 | hdr = (struct isis_fixed_hdr *) STREAM_DATA (circuit->rcv_stream); |
eb5d44eb | 1654 | |
f390d2c7 | 1655 | if ((hdr->idrp != ISO10589_ISIS) && (hdr->idrp != ISO9542_ESIS)) |
1656 | { | |
1657 | zlog_warn ("Not an IS-IS or ES-IS packet IDRP=%02x", hdr->idrp); | |
1658 | return ISIS_ERROR; | |
1659 | } | |
eb5d44eb | 1660 | |
1661 | /* now we need to know if this is an ISO 9542 packet and | |
1662 | * take real good care of it, waaa! | |
1663 | */ | |
f390d2c7 | 1664 | if (hdr->idrp == ISO9542_ESIS) |
1665 | { | |
1666 | esis_hdr = (struct esis_fixed_hdr *) STREAM_DATA (circuit->rcv_stream); | |
1667 | stream_set_getp (circuit->rcv_stream, ESIS_FIXED_HDR_LEN); | |
1668 | /* FIXME: Need to do some acceptence tests */ | |
1669 | /* example length... */ | |
1670 | switch (esis_hdr->pdu_type) | |
1671 | { | |
1672 | case ESH_PDU: | |
1673 | /* FIXME */ | |
1674 | break; | |
1675 | case ISH_PDU: | |
529d65b3 | 1676 | zlog_debug ("AN ISH PDU!!"); |
f390d2c7 | 1677 | retval = process_is_hello (circuit); |
1678 | break; | |
1679 | default: | |
1680 | return ISIS_ERROR; | |
1681 | } | |
1682 | return retval; | |
1683 | } | |
1684 | else | |
1685 | { | |
1686 | stream_set_getp (circuit->rcv_stream, ISIS_FIXED_HDR_LEN); | |
1687 | } | |
eb5d44eb | 1688 | /* |
1689 | * and then process it | |
1690 | */ | |
1691 | ||
f390d2c7 | 1692 | if (hdr->length < ISIS_MINIMUM_FIXED_HDR_LEN) |
1693 | { | |
1694 | zlog_err ("Fixed header length = %d", hdr->length); | |
1695 | return ISIS_ERROR; | |
1696 | } | |
eb5d44eb | 1697 | |
f390d2c7 | 1698 | if (hdr->version1 != 1) |
1699 | { | |
1700 | zlog_warn ("Unsupported ISIS version %u", hdr->version1); | |
1701 | return ISIS_WARNING; | |
1702 | } | |
eb5d44eb | 1703 | /* either 6 or 0 */ |
f390d2c7 | 1704 | if ((hdr->id_len != 0) && (hdr->id_len != ISIS_SYS_ID_LEN)) |
1705 | { | |
1706 | zlog_err | |
1707 | ("IDFieldLengthMismatch: ID Length field in a received PDU %u, " | |
1708 | "while the parameter for this IS is %u", hdr->id_len, | |
1709 | ISIS_SYS_ID_LEN); | |
1710 | return ISIS_ERROR; | |
1711 | } | |
eb5d44eb | 1712 | |
f390d2c7 | 1713 | if (hdr->version2 != 1) |
1714 | { | |
1715 | zlog_warn ("Unsupported ISIS version %u", hdr->version2); | |
1716 | return ISIS_WARNING; | |
1717 | } | |
eb5d44eb | 1718 | /* either 3 or 0 */ |
f390d2c7 | 1719 | if ((hdr->max_area_addrs != 0) |
1720 | && (hdr->max_area_addrs != isis->max_area_addrs)) | |
1721 | { | |
1722 | zlog_err ("maximumAreaAddressesMismatch: maximumAreaAdresses in a " | |
1723 | "received PDU %u while the parameter for this IS is %u", | |
1724 | hdr->max_area_addrs, isis->max_area_addrs); | |
1725 | return ISIS_ERROR; | |
1726 | } | |
eb5d44eb | 1727 | |
f390d2c7 | 1728 | switch (hdr->pdu_type) |
1729 | { | |
1730 | case L1_LAN_HELLO: | |
1731 | retval = process_lan_hello (ISIS_LEVEL1, circuit, ssnpa); | |
1732 | break; | |
1733 | case L2_LAN_HELLO: | |
1734 | retval = process_lan_hello (ISIS_LEVEL2, circuit, ssnpa); | |
1735 | break; | |
1736 | case P2P_HELLO: | |
1737 | retval = process_p2p_hello (circuit); | |
1738 | break; | |
1739 | case L1_LINK_STATE: | |
1740 | retval = process_lsp (ISIS_LEVEL1, circuit, ssnpa); | |
1741 | break; | |
1742 | case L2_LINK_STATE: | |
1743 | retval = process_lsp (ISIS_LEVEL2, circuit, ssnpa); | |
1744 | break; | |
1745 | case L1_COMPLETE_SEQ_NUM: | |
1746 | retval = process_csnp (ISIS_LEVEL1, circuit, ssnpa); | |
1747 | break; | |
1748 | case L2_COMPLETE_SEQ_NUM: | |
1749 | retval = process_csnp (ISIS_LEVEL2, circuit, ssnpa); | |
1750 | break; | |
1751 | case L1_PARTIAL_SEQ_NUM: | |
1752 | retval = process_psnp (ISIS_LEVEL1, circuit, ssnpa); | |
1753 | break; | |
1754 | case L2_PARTIAL_SEQ_NUM: | |
1755 | retval = process_psnp (ISIS_LEVEL2, circuit, ssnpa); | |
1756 | break; | |
1757 | default: | |
1758 | return ISIS_ERROR; | |
1759 | } | |
eb5d44eb | 1760 | |
1761 | return retval; | |
1762 | } | |
1763 | ||
eb5d44eb | 1764 | #ifdef GNU_LINUX |
1765 | int | |
1766 | isis_receive (struct thread *thread) | |
1767 | { | |
eb5d44eb | 1768 | struct isis_circuit *circuit; |
1769 | u_char ssnpa[ETH_ALEN]; | |
1770 | int retval; | |
1771 | ||
1772 | /* | |
1773 | * Get the circuit | |
1774 | */ | |
1775 | circuit = THREAD_ARG (thread); | |
1776 | assert (circuit); | |
1777 | ||
1778 | if (circuit->rcv_stream == NULL) | |
f390d2c7 | 1779 | circuit->rcv_stream = stream_new (ISO_MTU (circuit)); |
eb5d44eb | 1780 | else |
1781 | stream_reset (circuit->rcv_stream); | |
1782 | ||
1783 | retval = circuit->rx (circuit, ssnpa); | |
f390d2c7 | 1784 | circuit->t_read = NULL; |
eb5d44eb | 1785 | |
1786 | if (retval == ISIS_OK) | |
1787 | retval = isis_handle_pdu (circuit, ssnpa); | |
1788 | ||
1789 | /* | |
1790 | * prepare for next packet. | |
1791 | */ | |
f390d2c7 | 1792 | THREAD_READ_ON (master, circuit->t_read, isis_receive, circuit, |
1793 | circuit->fd); | |
eb5d44eb | 1794 | |
1795 | return retval; | |
1796 | } | |
1797 | ||
1798 | #else | |
1799 | int | |
1800 | isis_receive (struct thread *thread) | |
1801 | { | |
eb5d44eb | 1802 | struct isis_circuit *circuit; |
1803 | u_char ssnpa[ETH_ALEN]; | |
1804 | int retval; | |
1805 | ||
1806 | /* | |
1807 | * Get the circuit | |
1808 | */ | |
1809 | circuit = THREAD_ARG (thread); | |
1810 | assert (circuit); | |
1811 | ||
f390d2c7 | 1812 | circuit->t_read = NULL; |
eb5d44eb | 1813 | |
1814 | if (circuit->rcv_stream == NULL) | |
f390d2c7 | 1815 | circuit->rcv_stream = stream_new (ISO_MTU (circuit)); |
eb5d44eb | 1816 | else |
1817 | stream_reset (circuit->rcv_stream); | |
1818 | ||
1819 | retval = circuit->rx (circuit, ssnpa); | |
1820 | ||
1821 | if (retval == ISIS_OK) | |
1822 | retval = isis_handle_pdu (circuit, ssnpa); | |
1823 | ||
1824 | /* | |
1825 | * prepare for next packet. | |
1826 | */ | |
f390d2c7 | 1827 | circuit->t_read = thread_add_timer_msec (master, isis_receive, circuit, |
1828 | listcount | |
1829 | (circuit->area->circuit_list) * | |
1830 | 100); | |
eb5d44eb | 1831 | |
1832 | return retval; | |
1833 | } | |
1834 | ||
1835 | #endif | |
1836 | ||
1837 | /* filling of the fixed isis header */ | |
1838 | void | |
1839 | fill_fixed_hdr (struct isis_fixed_hdr *hdr, u_char pdu_type) | |
1840 | { | |
1841 | memset (hdr, 0, sizeof (struct isis_fixed_hdr)); | |
1842 | ||
1843 | hdr->idrp = ISO10589_ISIS; | |
1844 | ||
f390d2c7 | 1845 | switch (pdu_type) |
1846 | { | |
1847 | case L1_LAN_HELLO: | |
1848 | case L2_LAN_HELLO: | |
1849 | hdr->length = ISIS_LANHELLO_HDRLEN; | |
1850 | break; | |
1851 | case P2P_HELLO: | |
1852 | hdr->length = ISIS_P2PHELLO_HDRLEN; | |
1853 | break; | |
1854 | case L1_LINK_STATE: | |
1855 | case L2_LINK_STATE: | |
1856 | hdr->length = ISIS_LSP_HDR_LEN; | |
1857 | break; | |
1858 | case L1_COMPLETE_SEQ_NUM: | |
1859 | case L2_COMPLETE_SEQ_NUM: | |
1860 | hdr->length = ISIS_CSNP_HDRLEN; | |
1861 | break; | |
1862 | case L1_PARTIAL_SEQ_NUM: | |
1863 | case L2_PARTIAL_SEQ_NUM: | |
1864 | hdr->length = ISIS_PSNP_HDRLEN; | |
1865 | break; | |
1866 | default: | |
1867 | zlog_warn ("fill_fixed_hdr(): unknown pdu type %d", pdu_type); | |
1868 | return; | |
1869 | } | |
eb5d44eb | 1870 | hdr->length += ISIS_FIXED_HDR_LEN; |
1871 | hdr->pdu_type = pdu_type; | |
1872 | hdr->version1 = 1; | |
f390d2c7 | 1873 | hdr->id_len = 0; /* ISIS_SYS_ID_LEN - 0==6 */ |
eb5d44eb | 1874 | hdr->version2 = 1; |
f390d2c7 | 1875 | hdr->max_area_addrs = 0; /* isis->max_area_addrs - 0==3 */ |
eb5d44eb | 1876 | } |
1877 | ||
eb5d44eb | 1878 | /* |
1879 | * SEND SIDE | |
1880 | */ | |
92365889 | 1881 | static void |
eb5d44eb | 1882 | fill_fixed_hdr_andstream (struct isis_fixed_hdr *hdr, u_char pdu_type, |
f390d2c7 | 1883 | struct stream *stream) |
eb5d44eb | 1884 | { |
f390d2c7 | 1885 | fill_fixed_hdr (hdr, pdu_type); |
eb5d44eb | 1886 | |
1887 | stream_putc (stream, hdr->idrp); | |
1888 | stream_putc (stream, hdr->length); | |
1889 | stream_putc (stream, hdr->version1); | |
1890 | stream_putc (stream, hdr->id_len); | |
1891 | stream_putc (stream, hdr->pdu_type); | |
1892 | stream_putc (stream, hdr->version2); | |
1893 | stream_putc (stream, hdr->reserved); | |
1894 | stream_putc (stream, hdr->max_area_addrs); | |
1895 | ||
1896 | return; | |
1897 | } | |
1898 | ||
eb5d44eb | 1899 | int |
1900 | send_hello (struct isis_circuit *circuit, int level) | |
1901 | { | |
1902 | struct isis_fixed_hdr fixed_hdr; | |
1903 | struct isis_lan_hello_hdr hello_hdr; | |
1904 | struct isis_p2p_hello_hdr p2p_hello_hdr; | |
1905 | ||
1906 | u_int32_t interval; | |
1907 | unsigned long len_pointer, length; | |
1908 | int retval; | |
1909 | ||
f390d2c7 | 1910 | if (circuit->interface->mtu == 0) |
1911 | { | |
1912 | zlog_warn ("circuit has zero MTU"); | |
1913 | return ISIS_WARNING; | |
1914 | } | |
eb5d44eb | 1915 | |
1916 | if (!circuit->snd_stream) | |
f390d2c7 | 1917 | circuit->snd_stream = stream_new (ISO_MTU (circuit)); |
eb5d44eb | 1918 | else |
1919 | stream_reset (circuit->snd_stream); | |
1920 | ||
1921 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) | |
1922 | if (level == 1) | |
f390d2c7 | 1923 | fill_fixed_hdr_andstream (&fixed_hdr, L1_LAN_HELLO, |
1924 | circuit->snd_stream); | |
eb5d44eb | 1925 | else |
f390d2c7 | 1926 | fill_fixed_hdr_andstream (&fixed_hdr, L2_LAN_HELLO, |
1927 | circuit->snd_stream); | |
eb5d44eb | 1928 | else |
f390d2c7 | 1929 | fill_fixed_hdr_andstream (&fixed_hdr, P2P_HELLO, circuit->snd_stream); |
eb5d44eb | 1930 | |
1931 | /* | |
1932 | * Fill LAN Level 1 or 2 Hello PDU header | |
1933 | */ | |
1934 | memset (&hello_hdr, 0, sizeof (struct isis_lan_hello_hdr)); | |
f390d2c7 | 1935 | interval = circuit->hello_multiplier[level - 1] * |
eb5d44eb | 1936 | circuit->hello_interval[level - 1]; |
1937 | if (interval > USHRT_MAX) | |
1938 | interval = USHRT_MAX; | |
1939 | hello_hdr.circuit_t = circuit->circuit_is_type; | |
1940 | memcpy (hello_hdr.source_id, isis->sysid, ISIS_SYS_ID_LEN); | |
f390d2c7 | 1941 | hello_hdr.hold_time = htons ((u_int16_t) interval); |
eb5d44eb | 1942 | |
f390d2c7 | 1943 | hello_hdr.pdu_len = 0; /* Update the PDU Length later */ |
9985f83c | 1944 | len_pointer = stream_get_endp (circuit->snd_stream) + 3 + ISIS_SYS_ID_LEN; |
eb5d44eb | 1945 | |
1946 | /* copy the shared part of the hello to the p2p hello if needed */ | |
f390d2c7 | 1947 | if (circuit->circ_type == CIRCUIT_T_P2P) |
1948 | { | |
1949 | memcpy (&p2p_hello_hdr, &hello_hdr, 5 + ISIS_SYS_ID_LEN); | |
1950 | p2p_hello_hdr.local_id = circuit->circuit_id; | |
1951 | /* FIXME: need better understanding */ | |
1952 | stream_put (circuit->snd_stream, &p2p_hello_hdr, ISIS_P2PHELLO_HDRLEN); | |
1953 | } | |
1954 | else | |
1955 | { | |
1956 | hello_hdr.prio = circuit->u.bc.priority[level - 1]; | |
1957 | if (level == 1 && circuit->u.bc.l1_desig_is) | |
1958 | { | |
1959 | memcpy (hello_hdr.lan_id, circuit->u.bc.l1_desig_is, | |
1960 | ISIS_SYS_ID_LEN + 1); | |
1961 | } | |
1962 | else if (level == 2 && circuit->u.bc.l2_desig_is) | |
1963 | { | |
1964 | memcpy (hello_hdr.lan_id, circuit->u.bc.l2_desig_is, | |
1965 | ISIS_SYS_ID_LEN + 1); | |
1966 | } | |
1967 | stream_put (circuit->snd_stream, &hello_hdr, ISIS_LANHELLO_HDRLEN); | |
1968 | } | |
eb5d44eb | 1969 | |
1970 | /* | |
1971 | * Then the variable length part | |
1972 | */ | |
1973 | /* add circuit password */ | |
1974 | if (circuit->passwd.type) | |
1975 | if (tlv_add_authinfo (circuit->passwd.type, circuit->passwd.len, | |
1976 | circuit->passwd.passwd, circuit->snd_stream)) | |
1977 | return ISIS_WARNING; | |
1978 | /* Area Addresses TLV */ | |
1979 | assert (circuit->area); | |
1980 | if (circuit->area->area_addrs && circuit->area->area_addrs->count > 0) | |
1981 | if (tlv_add_area_addrs (circuit->area->area_addrs, circuit->snd_stream)) | |
1982 | return ISIS_WARNING; | |
1983 | ||
1984 | /* LAN Neighbors TLV */ | |
f390d2c7 | 1985 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) |
1986 | { | |
1987 | if (level == 1 && circuit->u.bc.lan_neighs[0]->count > 0) | |
1988 | if (tlv_add_lan_neighs (circuit->u.bc.lan_neighs[0], | |
1989 | circuit->snd_stream)) | |
1990 | return ISIS_WARNING; | |
1991 | if (level == 2 && circuit->u.bc.lan_neighs[1]->count > 0) | |
1992 | if (tlv_add_lan_neighs (circuit->u.bc.lan_neighs[1], | |
1993 | circuit->snd_stream)) | |
1994 | return ISIS_WARNING; | |
1995 | } | |
eb5d44eb | 1996 | |
1997 | /* Protocols Supported TLV */ | |
f390d2c7 | 1998 | if (circuit->nlpids.count > 0) |
eb5d44eb | 1999 | if (tlv_add_nlpid (&circuit->nlpids, circuit->snd_stream)) |
2000 | return ISIS_WARNING; | |
2001 | /* IP interface Address TLV */ | |
2002 | if (circuit->ip_router && circuit->ip_addrs && circuit->ip_addrs->count > 0) | |
2003 | if (tlv_add_ip_addrs (circuit->ip_addrs, circuit->snd_stream)) | |
2004 | return ISIS_WARNING; | |
2005 | ||
f390d2c7 | 2006 | #ifdef HAVE_IPV6 |
eb5d44eb | 2007 | /* IPv6 Interface Address TLV */ |
f390d2c7 | 2008 | if (circuit->ipv6_router && circuit->ipv6_link && |
eb5d44eb | 2009 | circuit->ipv6_link->count > 0) |
2010 | if (tlv_add_ipv6_addrs (circuit->ipv6_link, circuit->snd_stream)) | |
2011 | return ISIS_WARNING; | |
2012 | #endif /* HAVE_IPV6 */ | |
2013 | ||
2014 | if (circuit->u.bc.pad_hellos) | |
2015 | if (tlv_add_padding (circuit->snd_stream)) | |
2016 | return ISIS_WARNING; | |
2017 | ||
9985f83c | 2018 | length = stream_get_endp (circuit->snd_stream); |
eb5d44eb | 2019 | /* Update PDU length */ |
f390d2c7 | 2020 | stream_putw_at (circuit->snd_stream, len_pointer, (u_int16_t) length); |
eb5d44eb | 2021 | |
2022 | retval = circuit->tx (circuit, level); | |
2023 | if (retval) | |
2024 | zlog_warn ("sending of LAN Level %d Hello failed", level); | |
2025 | ||
2026 | /* DEBUG_ADJ_PACKETS */ | |
f390d2c7 | 2027 | if (isis->debugs & DEBUG_ADJ_PACKETS) |
2028 | { | |
2029 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) | |
2030 | { | |
529d65b3 | 2031 | zlog_debug ("ISIS-Adj (%s): Sent L%d LAN IIH on %s, length %ld", |
2032 | circuit->area->area_tag, level, circuit->interface->name, | |
2033 | STREAM_SIZE (circuit->snd_stream)); | |
f390d2c7 | 2034 | } |
2035 | else | |
2036 | { | |
529d65b3 | 2037 | zlog_debug ("ISIS-Adj (%s): Sent P2P IIH on %s, length %ld", |
2038 | circuit->area->area_tag, circuit->interface->name, | |
2039 | STREAM_SIZE (circuit->snd_stream)); | |
f390d2c7 | 2040 | } |
eb5d44eb | 2041 | } |
eb5d44eb | 2042 | |
2043 | return retval; | |
2044 | } | |
2045 | ||
92365889 | 2046 | static int |
eb5d44eb | 2047 | send_lan_hello (struct isis_circuit *circuit, int level) |
2048 | { | |
f390d2c7 | 2049 | return send_hello (circuit, level); |
eb5d44eb | 2050 | } |
2051 | ||
2052 | int | |
2053 | send_lan_l1_hello (struct thread *thread) | |
2054 | { | |
eb5d44eb | 2055 | struct isis_circuit *circuit; |
2056 | int retval; | |
2057 | ||
2058 | circuit = THREAD_ARG (thread); | |
2059 | assert (circuit); | |
2060 | circuit->u.bc.t_send_lan_hello[0] = NULL; | |
2061 | ||
2062 | if (circuit->u.bc.run_dr_elect[0]) | |
f390d2c7 | 2063 | retval = isis_dr_elect (circuit, 1); |
eb5d44eb | 2064 | |
2065 | retval = send_lan_hello (circuit, 1); | |
2066 | ||
2067 | /* set next timer thread */ | |
f390d2c7 | 2068 | THREAD_TIMER_ON (master, circuit->u.bc.t_send_lan_hello[0], |
2069 | send_lan_l1_hello, circuit, | |
2070 | isis_jitter (circuit->hello_interval[0], IIH_JITTER)); | |
eb5d44eb | 2071 | |
2072 | return retval; | |
2073 | } | |
2074 | ||
2075 | int | |
2076 | send_lan_l2_hello (struct thread *thread) | |
2077 | { | |
2078 | struct isis_circuit *circuit; | |
2079 | int retval; | |
2080 | ||
2081 | circuit = THREAD_ARG (thread); | |
2082 | assert (circuit); | |
2083 | circuit->u.bc.t_send_lan_hello[1] = NULL; | |
2084 | ||
2085 | if (circuit->u.bc.run_dr_elect[1]) | |
2086 | retval = isis_dr_elect (circuit, 2); | |
2087 | ||
2088 | retval = send_lan_hello (circuit, 2); | |
2089 | ||
f390d2c7 | 2090 | /* set next timer thread */ |
2091 | THREAD_TIMER_ON (master, circuit->u.bc.t_send_lan_hello[1], | |
2092 | send_lan_l2_hello, circuit, | |
2093 | isis_jitter (circuit->hello_interval[1], IIH_JITTER)); | |
eb5d44eb | 2094 | |
2095 | return retval; | |
2096 | } | |
2097 | ||
2098 | int | |
2099 | send_p2p_hello (struct thread *thread) | |
2100 | { | |
2101 | struct isis_circuit *circuit; | |
2102 | ||
2103 | circuit = THREAD_ARG (thread); | |
2104 | assert (circuit); | |
2105 | circuit->u.p2p.t_send_p2p_hello = NULL; | |
2106 | ||
f390d2c7 | 2107 | send_hello (circuit, 1); |
eb5d44eb | 2108 | |
f390d2c7 | 2109 | /* set next timer thread */ |
2110 | THREAD_TIMER_ON (master, circuit->u.p2p.t_send_p2p_hello, send_p2p_hello, | |
2111 | circuit, isis_jitter (circuit->hello_interval[1], | |
2112 | IIH_JITTER)); | |
eb5d44eb | 2113 | |
2114 | return ISIS_OK; | |
2115 | } | |
2116 | ||
92365889 | 2117 | static int |
f390d2c7 | 2118 | build_csnp (int level, u_char * start, u_char * stop, struct list *lsps, |
2119 | struct isis_circuit *circuit) | |
eb5d44eb | 2120 | { |
2121 | struct isis_fixed_hdr fixed_hdr; | |
2122 | struct isis_passwd *passwd; | |
2123 | int retval = ISIS_OK; | |
2124 | unsigned long lenp; | |
2125 | u_int16_t length; | |
2126 | ||
f390d2c7 | 2127 | if (level == 1) |
2128 | fill_fixed_hdr_andstream (&fixed_hdr, L1_COMPLETE_SEQ_NUM, | |
2129 | circuit->snd_stream); | |
eb5d44eb | 2130 | else |
f390d2c7 | 2131 | fill_fixed_hdr_andstream (&fixed_hdr, L2_COMPLETE_SEQ_NUM, |
2132 | circuit->snd_stream); | |
eb5d44eb | 2133 | |
2134 | /* | |
2135 | * Fill Level 1 or 2 Complete Sequence Numbers header | |
2136 | */ | |
2137 | ||
9985f83c | 2138 | lenp = stream_get_endp (circuit->snd_stream); |
f390d2c7 | 2139 | stream_putw (circuit->snd_stream, 0); /* PDU length - when we know it */ |
eb5d44eb | 2140 | /* no need to send the source here, it is always us if we csnp */ |
2141 | stream_put (circuit->snd_stream, isis->sysid, ISIS_SYS_ID_LEN); | |
2142 | /* with zero circuit id - ref 9.10, 9.11 */ | |
2143 | stream_putc (circuit->snd_stream, 0x00); | |
2144 | ||
2145 | stream_put (circuit->snd_stream, start, ISIS_SYS_ID_LEN + 2); | |
2146 | stream_put (circuit->snd_stream, stop, ISIS_SYS_ID_LEN + 2); | |
2147 | ||
2148 | /* | |
2149 | * And TLVs | |
2150 | */ | |
2151 | if (level == 1) | |
2152 | passwd = &circuit->area->area_passwd; | |
2153 | else | |
2154 | passwd = &circuit->area->domain_passwd; | |
2155 | ||
1cbc562b | 2156 | if (CHECK_FLAG(passwd->snp_auth, SNP_AUTH_SEND)) |
2157 | if (passwd->type) | |
2158 | retval = tlv_add_authinfo (passwd->type, passwd->len, | |
2159 | passwd->passwd, circuit->snd_stream); | |
eb5d44eb | 2160 | |
f390d2c7 | 2161 | if (!retval && lsps) |
2162 | { | |
2163 | retval = tlv_add_lsp_entries (lsps, circuit->snd_stream); | |
2164 | } | |
9985f83c | 2165 | length = (u_int16_t) stream_get_endp (circuit->snd_stream); |
eb5d44eb | 2166 | assert (length >= ISIS_CSNP_HDRLEN); |
2167 | /* Update PU length */ | |
2168 | stream_putw_at (circuit->snd_stream, lenp, length); | |
2169 | ||
2170 | return retval; | |
2171 | } | |
2172 | ||
2173 | /* | |
2174 | * FIXME: support multiple CSNPs | |
2175 | */ | |
2176 | ||
2177 | int | |
2178 | send_csnp (struct isis_circuit *circuit, int level) | |
2179 | { | |
2180 | int retval = ISIS_OK; | |
2181 | u_char start[ISIS_SYS_ID_LEN + 2]; | |
2182 | u_char stop[ISIS_SYS_ID_LEN + 2]; | |
2183 | struct list *list = NULL; | |
1eb8ef25 | 2184 | struct listnode *node, *nnode; |
eb5d44eb | 2185 | struct isis_lsp *lsp; |
2186 | ||
f390d2c7 | 2187 | memset (start, 0x00, ISIS_SYS_ID_LEN + 2); |
eb5d44eb | 2188 | memset (stop, 0xff, ISIS_SYS_ID_LEN + 2); |
2189 | ||
f390d2c7 | 2190 | if (circuit->area->lspdb[level - 1] && |
2191 | dict_count (circuit->area->lspdb[level - 1]) > 0) | |
2192 | { | |
2193 | list = list_new (); | |
2194 | lsp_build_list (start, stop, list, circuit->area->lspdb[level - 1]); | |
2195 | ||
2196 | if (circuit->snd_stream == NULL) | |
2197 | circuit->snd_stream = stream_new (ISO_MTU (circuit)); | |
2198 | else | |
2199 | stream_reset (circuit->snd_stream); | |
2200 | ||
2201 | retval = build_csnp (level, start, stop, list, circuit); | |
2202 | ||
2203 | if (isis->debugs & DEBUG_SNP_PACKETS) | |
2204 | { | |
529d65b3 | 2205 | zlog_debug ("ISIS-Snp (%s): Sent L%d CSNP on %s, length %ld", |
1eb8ef25 | 2206 | circuit->area->area_tag, level, circuit->interface->name, |
2207 | STREAM_SIZE (circuit->snd_stream)); | |
2208 | for (ALL_LIST_ELEMENTS (list, node, nnode, lsp)) | |
f390d2c7 | 2209 | { |
529d65b3 | 2210 | zlog_debug ("ISIS-Snp (%s): CSNP entry %s, seq 0x%08x," |
2211 | " cksum 0x%04x, lifetime %us", | |
2212 | circuit->area->area_tag, | |
2213 | rawlspid_print (lsp->lsp_header->lsp_id), | |
2214 | ntohl (lsp->lsp_header->seq_num), | |
2215 | ntohs (lsp->lsp_header->checksum), | |
2216 | ntohs (lsp->lsp_header->rem_lifetime)); | |
f390d2c7 | 2217 | } |
2218 | } | |
eb5d44eb | 2219 | |
f390d2c7 | 2220 | list_delete (list); |
eb5d44eb | 2221 | |
f390d2c7 | 2222 | if (retval == ISIS_OK) |
2223 | retval = circuit->tx (circuit, level); | |
2224 | } | |
eb5d44eb | 2225 | return retval; |
2226 | } | |
2227 | ||
2228 | int | |
2229 | send_l1_csnp (struct thread *thread) | |
2230 | { | |
2231 | struct isis_circuit *circuit; | |
2232 | int retval = ISIS_OK; | |
2233 | ||
2234 | circuit = THREAD_ARG (thread); | |
2235 | assert (circuit); | |
2236 | ||
2237 | circuit->t_send_csnp[0] = NULL; | |
2238 | ||
f390d2c7 | 2239 | if (circuit->circ_type == CIRCUIT_T_BROADCAST && circuit->u.bc.is_dr[0]) |
2240 | { | |
2241 | send_csnp (circuit, 1); | |
2242 | } | |
eb5d44eb | 2243 | /* set next timer thread */ |
f390d2c7 | 2244 | THREAD_TIMER_ON (master, circuit->t_send_csnp[0], send_l1_csnp, circuit, |
2245 | isis_jitter (circuit->csnp_interval[0], CSNP_JITTER)); | |
eb5d44eb | 2246 | |
2247 | return retval; | |
2248 | } | |
2249 | ||
2250 | int | |
2251 | send_l2_csnp (struct thread *thread) | |
2252 | { | |
2253 | struct isis_circuit *circuit; | |
2254 | int retval = ISIS_OK; | |
2255 | ||
2256 | circuit = THREAD_ARG (thread); | |
2257 | assert (circuit); | |
2258 | ||
2259 | circuit->t_send_csnp[1] = NULL; | |
2260 | ||
f390d2c7 | 2261 | if (circuit->circ_type == CIRCUIT_T_BROADCAST && circuit->u.bc.is_dr[1]) |
2262 | { | |
2263 | send_csnp (circuit, 2); | |
2264 | } | |
eb5d44eb | 2265 | /* set next timer thread */ |
f390d2c7 | 2266 | THREAD_TIMER_ON (master, circuit->t_send_csnp[1], send_l2_csnp, circuit, |
2267 | isis_jitter (circuit->csnp_interval[1], CSNP_JITTER)); | |
d70f99e1 | 2268 | |
eb5d44eb | 2269 | return retval; |
2270 | } | |
2271 | ||
92365889 | 2272 | static int |
eb5d44eb | 2273 | build_psnp (int level, struct isis_circuit *circuit, struct list *lsps) |
2274 | { | |
2275 | struct isis_fixed_hdr fixed_hdr; | |
2276 | unsigned long lenp; | |
2277 | u_int16_t length; | |
2278 | int retval = 0; | |
2279 | struct isis_lsp *lsp; | |
2280 | struct isis_passwd *passwd; | |
1eb8ef25 | 2281 | struct listnode *node, *nnode; |
eb5d44eb | 2282 | |
2283 | if (level == 1) | |
f390d2c7 | 2284 | fill_fixed_hdr_andstream (&fixed_hdr, L1_PARTIAL_SEQ_NUM, |
2285 | circuit->snd_stream); | |
eb5d44eb | 2286 | else |
2287 | fill_fixed_hdr_andstream (&fixed_hdr, L2_PARTIAL_SEQ_NUM, | |
f390d2c7 | 2288 | circuit->snd_stream); |
eb5d44eb | 2289 | |
2290 | /* | |
2291 | * Fill Level 1 or 2 Partial Sequence Numbers header | |
2292 | */ | |
9985f83c | 2293 | lenp = stream_get_endp (circuit->snd_stream); |
f390d2c7 | 2294 | stream_putw (circuit->snd_stream, 0); /* PDU length - when we know it */ |
eb5d44eb | 2295 | stream_put (circuit->snd_stream, isis->sysid, ISIS_SYS_ID_LEN); |
2296 | stream_putc (circuit->snd_stream, circuit->idx); | |
2297 | ||
2298 | /* | |
2299 | * And TLVs | |
2300 | */ | |
2301 | ||
2302 | if (level == 1) | |
2303 | passwd = &circuit->area->area_passwd; | |
2304 | else | |
2305 | passwd = &circuit->area->domain_passwd; | |
2306 | ||
1cbc562b | 2307 | if (CHECK_FLAG(passwd->snp_auth, SNP_AUTH_SEND)) |
2308 | if (passwd->type) | |
2309 | retval = tlv_add_authinfo (passwd->type, passwd->len, | |
2310 | passwd->passwd, circuit->snd_stream); | |
eb5d44eb | 2311 | |
f390d2c7 | 2312 | if (!retval && lsps) |
2313 | { | |
2314 | retval = tlv_add_lsp_entries (lsps, circuit->snd_stream); | |
2315 | } | |
eb5d44eb | 2316 | |
f390d2c7 | 2317 | if (isis->debugs & DEBUG_SNP_PACKETS) |
2318 | { | |
1eb8ef25 | 2319 | for (ALL_LIST_ELEMENTS (lsps, node, nnode, lsp)) |
f390d2c7 | 2320 | { |
529d65b3 | 2321 | zlog_debug ("ISIS-Snp (%s): PSNP entry %s, seq 0x%08x," |
2322 | " cksum 0x%04x, lifetime %us", | |
2323 | circuit->area->area_tag, | |
2324 | rawlspid_print (lsp->lsp_header->lsp_id), | |
2325 | ntohl (lsp->lsp_header->seq_num), | |
2326 | ntohs (lsp->lsp_header->checksum), | |
2327 | ntohs (lsp->lsp_header->rem_lifetime)); | |
f390d2c7 | 2328 | } |
eb5d44eb | 2329 | } |
eb5d44eb | 2330 | |
9985f83c | 2331 | length = (u_int16_t) stream_get_endp (circuit->snd_stream); |
eb5d44eb | 2332 | assert (length >= ISIS_PSNP_HDRLEN); |
2333 | /* Update PDU length */ | |
2334 | stream_putw_at (circuit->snd_stream, lenp, length); | |
2335 | ||
2336 | return ISIS_OK; | |
2337 | } | |
2338 | ||
2339 | /* | |
2340 | * 7.3.15.4 action on expiration of partial SNP interval | |
2341 | * level 1 | |
2342 | */ | |
92365889 | 2343 | static int |
eb5d44eb | 2344 | send_psnp (int level, struct isis_circuit *circuit) |
2345 | { | |
2346 | int retval = ISIS_OK; | |
2347 | struct isis_lsp *lsp; | |
2348 | struct list *list = NULL; | |
1eb8ef25 | 2349 | struct listnode *node, *nnode; |
eb5d44eb | 2350 | |
f390d2c7 | 2351 | if ((circuit->circ_type == CIRCUIT_T_BROADCAST && |
eb5d44eb | 2352 | !circuit->u.bc.is_dr[level - 1]) || |
f390d2c7 | 2353 | circuit->circ_type != CIRCUIT_T_BROADCAST) |
2354 | { | |
eb5d44eb | 2355 | |
f390d2c7 | 2356 | if (circuit->area->lspdb[level - 1] && |
2357 | dict_count (circuit->area->lspdb[level - 1]) > 0) | |
2358 | { | |
2359 | list = list_new (); | |
2360 | lsp_build_list_ssn (circuit, list, circuit->area->lspdb[level - 1]); | |
2361 | ||
2362 | if (listcount (list) > 0) | |
2363 | { | |
2364 | if (circuit->snd_stream == NULL) | |
2365 | circuit->snd_stream = stream_new (ISO_MTU (circuit)); | |
2366 | else | |
2367 | stream_reset (circuit->snd_stream); | |
2368 | ||
2369 | ||
2370 | if (isis->debugs & DEBUG_SNP_PACKETS) | |
529d65b3 | 2371 | zlog_debug ("ISIS-Snp (%s): Sent L%d PSNP on %s, length %ld", |
2372 | circuit->area->area_tag, level, | |
2373 | circuit->interface->name, | |
2374 | STREAM_SIZE (circuit->snd_stream)); | |
f390d2c7 | 2375 | |
2376 | retval = build_psnp (level, circuit, list); | |
2377 | if (retval == ISIS_OK) | |
2378 | retval = circuit->tx (circuit, level); | |
2379 | ||
2380 | if (retval == ISIS_OK) | |
2381 | { | |
2382 | /* | |
2383 | * sending succeeded, we can clear SSN flags of this circuit | |
2384 | * for the LSPs in list | |
2385 | */ | |
1eb8ef25 | 2386 | for (ALL_LIST_ELEMENTS (list, node, nnode, lsp)) |
2387 | ISIS_CLEAR_FLAG (lsp->SSNflags, circuit); | |
f390d2c7 | 2388 | } |
2389 | } | |
2390 | list_delete (list); | |
2391 | } | |
eb5d44eb | 2392 | } |
eb5d44eb | 2393 | |
2394 | return retval; | |
2395 | } | |
2396 | ||
2397 | int | |
2398 | send_l1_psnp (struct thread *thread) | |
2399 | { | |
2400 | ||
2401 | struct isis_circuit *circuit; | |
2402 | int retval = ISIS_OK; | |
2403 | ||
2404 | circuit = THREAD_ARG (thread); | |
2405 | assert (circuit); | |
2406 | ||
2407 | circuit->t_send_psnp[0] = NULL; | |
2408 | ||
2409 | send_psnp (1, circuit); | |
2410 | /* set next timer thread */ | |
f390d2c7 | 2411 | THREAD_TIMER_ON (master, circuit->t_send_psnp[0], send_l1_psnp, circuit, |
2412 | isis_jitter (circuit->psnp_interval[0], PSNP_JITTER)); | |
eb5d44eb | 2413 | |
2414 | return retval; | |
2415 | } | |
2416 | ||
2417 | /* | |
2418 | * 7.3.15.4 action on expiration of partial SNP interval | |
2419 | * level 2 | |
2420 | */ | |
2421 | int | |
2422 | send_l2_psnp (struct thread *thread) | |
2423 | { | |
eb5d44eb | 2424 | struct isis_circuit *circuit; |
2425 | int retval = ISIS_OK; | |
2426 | ||
2427 | circuit = THREAD_ARG (thread); | |
2428 | assert (circuit); | |
2429 | ||
2430 | circuit->t_send_psnp[1] = NULL; | |
2431 | ||
2432 | send_psnp (2, circuit); | |
2433 | ||
2434 | /* set next timer thread */ | |
f390d2c7 | 2435 | THREAD_TIMER_ON (master, circuit->t_send_psnp[1], send_l2_psnp, circuit, |
2436 | isis_jitter (circuit->psnp_interval[1], PSNP_JITTER)); | |
eb5d44eb | 2437 | |
2438 | return retval; | |
2439 | } | |
2440 | ||
92365889 | 2441 | /* FIXME: Not used any more? */ |
2442 | /* static void | |
eb5d44eb | 2443 | build_link_state (struct isis_lsp *lsp, struct isis_circuit *circuit, |
f390d2c7 | 2444 | struct stream *stream) |
eb5d44eb | 2445 | { |
2446 | unsigned long length; | |
2447 | ||
f390d2c7 | 2448 | stream_put (stream, lsp->pdu, ntohs (lsp->lsp_header->pdu_len)); |
9985f83c | 2449 | length = stream_get_endp (stream); |
eb5d44eb | 2450 | |
2451 | return; | |
92365889 | 2452 | } */ |
eb5d44eb | 2453 | |
eb5d44eb | 2454 | /* |
2455 | * ISO 10589 - 7.3.14.3 | |
2456 | */ | |
2457 | int | |
2458 | send_lsp (struct thread *thread) | |
2459 | { | |
2460 | struct isis_circuit *circuit; | |
2461 | struct isis_lsp *lsp; | |
2462 | struct listnode *node; | |
2463 | int retval = 0; | |
2464 | ||
2465 | circuit = THREAD_ARG (thread); | |
2466 | assert (circuit); | |
2467 | ||
f390d2c7 | 2468 | if (circuit->state == C_STATE_UP) |
2469 | { | |
1eb8ef25 | 2470 | lsp = listgetdata ((node = listhead (circuit->lsp_queue))); |
eb5d44eb | 2471 | |
2472 | /* | |
f390d2c7 | 2473 | * Do not send if levels do not match |
eb5d44eb | 2474 | */ |
f390d2c7 | 2475 | if (!(lsp->level & circuit->circuit_is_type)) |
2476 | goto dontsend; | |
eb5d44eb | 2477 | |
f390d2c7 | 2478 | /* |
2479 | * Do not send if we do not have adjacencies in state up on the circuit | |
2480 | */ | |
2481 | if (circuit->upadjcount[lsp->level - 1] == 0) | |
2482 | goto dontsend; | |
2483 | /* only send if it needs sending */ | |
2484 | if ((time (NULL) - lsp->last_sent) >= | |
2485 | circuit->area->lsp_gen_interval[lsp->level - 1]) | |
2486 | { | |
2487 | ||
2488 | if (isis->debugs & DEBUG_UPDATE_PACKETS) | |
2489 | { | |
529d65b3 | 2490 | zlog_debug |
f390d2c7 | 2491 | ("ISIS-Upd (%s): Sent L%d LSP %s, seq 0x%08x, cksum 0x%04x," |
2492 | " lifetime %us on %s", circuit->area->area_tag, lsp->level, | |
2493 | rawlspid_print (lsp->lsp_header->lsp_id), | |
2494 | ntohl (lsp->lsp_header->seq_num), | |
2495 | ntohs (lsp->lsp_header->checksum), | |
2496 | ntohs (lsp->lsp_header->rem_lifetime), | |
2497 | circuit->interface->name); | |
2498 | } | |
2499 | /* copy our lsp to the send buffer */ | |
2500 | circuit->snd_stream->getp = lsp->pdu->getp; | |
f390d2c7 | 2501 | circuit->snd_stream->endp = lsp->pdu->endp; |
2502 | memcpy (circuit->snd_stream->data, lsp->pdu->data, lsp->pdu->endp); | |
2503 | ||
2504 | retval = circuit->tx (circuit, lsp->level); | |
eb5d44eb | 2505 | |
eb5d44eb | 2506 | /* |
f390d2c7 | 2507 | * If the sending succeeded, we can del the lsp from circuits |
2508 | * lsp_queue | |
eb5d44eb | 2509 | */ |
f390d2c7 | 2510 | if (retval == ISIS_OK) |
2511 | { | |
2512 | list_delete_node (circuit->lsp_queue, node); | |
2513 | ||
2514 | /* | |
2515 | * On broadcast circuits also the SRMflag can be cleared | |
2516 | */ | |
2517 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) | |
2518 | ISIS_CLEAR_FLAG (lsp->SRMflags, circuit); | |
2519 | ||
2520 | if (flags_any_set (lsp->SRMflags) == 0) | |
2521 | { | |
2522 | /* | |
2523 | * need to remember when we were last sent | |
2524 | */ | |
2525 | lsp->last_sent = time (NULL); | |
2526 | } | |
2527 | } | |
2528 | else | |
2529 | { | |
529d65b3 | 2530 | zlog_debug ("sending of level %d link state failed", lsp->level); |
f390d2c7 | 2531 | } |
2532 | } | |
2533 | else | |
2534 | { | |
2535 | /* my belief is that if it wasn't his time, the lsp can be removed | |
2536 | * from the queue | |
2537 | */ | |
2538 | dontsend: | |
2539 | list_delete_node (circuit->lsp_queue, node); | |
eb5d44eb | 2540 | } |
eb5d44eb | 2541 | #if 0 |
f390d2c7 | 2542 | /* |
2543 | * If there are still LSPs send next one after lsp-interval (33 msecs) | |
2544 | */ | |
2545 | if (listcount (circuit->lsp_queue) > 0) | |
2546 | thread_add_timer (master, send_lsp, circuit, 1); | |
eb5d44eb | 2547 | #endif |
f390d2c7 | 2548 | } |
eb5d44eb | 2549 | |
2550 | return retval; | |
f390d2c7 | 2551 | } |
eb5d44eb | 2552 | |
2553 | int | |
f390d2c7 | 2554 | ack_lsp (struct isis_link_state_hdr *hdr, struct isis_circuit *circuit, |
2555 | int level) | |
eb5d44eb | 2556 | { |
2557 | unsigned long lenp; | |
2558 | int retval; | |
2559 | u_int16_t length; | |
2560 | struct isis_fixed_hdr fixed_hdr; | |
2561 | ||
2562 | if (!circuit->snd_stream) | |
f390d2c7 | 2563 | circuit->snd_stream = stream_new (ISO_MTU (circuit)); |
eb5d44eb | 2564 | else |
2565 | stream_reset (circuit->snd_stream); | |
2566 | ||
2567 | // fill_llc_hdr (stream); | |
2568 | if (level == 1) | |
f390d2c7 | 2569 | fill_fixed_hdr_andstream (&fixed_hdr, L1_PARTIAL_SEQ_NUM, |
2570 | circuit->snd_stream); | |
eb5d44eb | 2571 | else |
f390d2c7 | 2572 | fill_fixed_hdr_andstream (&fixed_hdr, L2_PARTIAL_SEQ_NUM, |
2573 | circuit->snd_stream); | |
eb5d44eb | 2574 | |
2575 | ||
9985f83c | 2576 | lenp = stream_get_endp (circuit->snd_stream); |
f390d2c7 | 2577 | stream_putw (circuit->snd_stream, 0); /* PDU length */ |
2578 | stream_put (circuit->snd_stream, isis->sysid, ISIS_SYS_ID_LEN); | |
eb5d44eb | 2579 | stream_putc (circuit->snd_stream, circuit->idx); |
f390d2c7 | 2580 | stream_putc (circuit->snd_stream, 9); /* code */ |
2581 | stream_putc (circuit->snd_stream, 16); /* len */ | |
eb5d44eb | 2582 | |
f390d2c7 | 2583 | stream_putw (circuit->snd_stream, ntohs (hdr->rem_lifetime)); |
2584 | stream_put (circuit->snd_stream, hdr->lsp_id, ISIS_SYS_ID_LEN + 2); | |
2585 | stream_putl (circuit->snd_stream, ntohl (hdr->seq_num)); | |
2586 | stream_putw (circuit->snd_stream, ntohs (hdr->checksum)); | |
eb5d44eb | 2587 | |
9985f83c | 2588 | length = (u_int16_t) stream_get_endp (circuit->snd_stream); |
eb5d44eb | 2589 | /* Update PDU length */ |
2590 | stream_putw_at (circuit->snd_stream, lenp, length); | |
2591 | ||
2592 | retval = circuit->tx (circuit, level); | |
2593 | ||
2594 | return retval; | |
2595 | } | |
2596 | ||
2597 | #if 0 | |
2598 | /* | |
2599 | * ISH PDU Processing | |
2600 | */ | |
2601 | ||
eb5d44eb | 2602 | /* |
2603 | * Let's first check if the local and remote system have any common area | |
2604 | * addresses | |
2605 | */ | |
f390d2c7 | 2606 | if (area_match (tlvs.area_addrs, isis->man_area_addrs) == 0) |
2607 | { | |
2608 | if (circuit->circuit_t == IS_LEVEL_2) | |
2609 | { | |
2610 | /* do as in table 8 (p. 40) */ | |
2611 | switch (circuit_type) | |
2612 | { | |
2613 | case IS_LEVEL_1: | |
2614 | if (adj->adj_state != ISIS_ADJ_UP) | |
2615 | { | |
2616 | /* Reject */ | |
2617 | zlog_warn ("areaMismatch"); | |
2618 | retval = ISIS_WARNING; | |
2619 | } | |
2620 | else if (adj->adj_usage == ISIS_ADJ_LEVEL1) | |
2621 | { | |
2622 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, "Area Mismatch", | |
2623 | circuit->adjdb); | |
2624 | } | |
2625 | else if (adj->adj_usage == ISIS_ADJ_LEVEL1AND2 || | |
2626 | adj->adj_usage == ISIS_ADJ_LEVEL2) | |
2627 | { | |
2628 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, "Wrong System", | |
2629 | circuit->adjdb); | |
2630 | } | |
2631 | break; | |
2632 | case IS_LEVEL_2: | |
2633 | if (adj->adj_state != ISIS_ADJ_UP) | |
2634 | { | |
2635 | isis_adj_state_change (adj, ISIS_ADJ_UP, NULL, | |
2636 | circuit->adjdb); | |
2637 | adj->adj_usage = ISIS_ADJ_LEVEL2; | |
2638 | } | |
2639 | else if (adj->adj_usage == ISIS_ADJ_LEVEL1 || | |
2640 | adj->adj_usage == ISIS_ADJ_LEVEL1AND2) | |
2641 | { | |
2642 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, "Wrong System", | |
2643 | circuit->adjdb); | |
2644 | } | |
2645 | else if (adj->adj_usage == ISIS_ADJ_LEVEL2) | |
2646 | { | |
2647 | ; /* Accept */ | |
2648 | } | |
2649 | break; | |
2650 | case IS_LEVEL_1_AND_2: | |
2651 | if (adj->adj_state != ISIS_ADJ_UP) | |
2652 | { | |
2653 | isis_adj_state_change (adj, ISIS_ADJ_UP, NULL, | |
2654 | circuit->adjdb); | |
2655 | adj->adj_usage = ISIS_ADJ_LEVEL2; | |
2656 | } | |
2657 | else if (adj->adj_usage == ISIS_ADJ_LEVEL1) | |
2658 | { | |
2659 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, "Wrong System", | |
2660 | circuit->adjdb); | |
2661 | } | |
2662 | else if (adj->adj_usage == ISIS_ADJ_LEVEL1AND2) | |
2663 | { | |
2664 | isis_adj_state_change (adj, ISIS_ADJ_DOWN, "Area Mismatch", | |
2665 | circuit->adjdb); | |
2666 | } | |
2667 | else if (adj->adj_usage == ISIS_ADJ_LEVEL2) | |
2668 | { | |
2669 | ; /* Accept */ | |
2670 | } | |
2671 | break; | |
2672 | } | |
2673 | goto mismatch; | |
2674 | } | |
2675 | else | |
2676 | { | |
2677 | isis_delete_adj (adj, circuit->adjdb); | |
2678 | zlog_warn ("areaMismatch"); | |
2679 | return ISIS_WARNING; | |
eb5d44eb | 2680 | } |
eb5d44eb | 2681 | } |
2682 | ||
2683 | mismatch: | |
2684 | #endif |