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Commit | Line | Data |
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eb5d44eb | 1 | /* |
d62a17ae | 2 | * IS-IS Rout(e)ing protocol - isis_pdu.c |
eb5d44eb | 3 | * PDU processing |
4 | * | |
5 | * Copyright (C) 2001,2002 Sampo Saaristo | |
d62a17ae | 6 | * Tampere University of Technology |
eb5d44eb | 7 | * Institute of Communications Engineering |
8 | * | |
d62a17ae | 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) | |
eb5d44eb | 12 | * any later version. |
13 | * | |
d62a17ae | 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 | |
eb5d44eb | 17 | * more details. |
896014f4 DL |
18 | * |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; see the file COPYING; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
eb5d44eb | 22 | */ |
23 | ||
eb5d44eb | 24 | #include <zebra.h> |
eb5d44eb | 25 | |
26 | #include "memory.h" | |
27 | #include "thread.h" | |
28 | #include "linklist.h" | |
29 | #include "log.h" | |
30 | #include "stream.h" | |
31 | #include "vty.h" | |
3f045a08 | 32 | #include "hash.h" |
eb5d44eb | 33 | #include "prefix.h" |
34 | #include "if.h" | |
6a270cd9 | 35 | #include "checksum.h" |
3f045a08 | 36 | #include "md5.h" |
38937bd5 | 37 | #include "lib_errors.h" |
eb5d44eb | 38 | |
39 | #include "isisd/dict.h" | |
eb5d44eb | 40 | #include "isisd/isis_constants.h" |
41 | #include "isisd/isis_common.h" | |
3f045a08 | 42 | #include "isisd/isis_flags.h" |
eb5d44eb | 43 | #include "isisd/isis_adjacency.h" |
44 | #include "isisd/isis_circuit.h" | |
45 | #include "isisd/isis_network.h" | |
46 | #include "isisd/isis_misc.h" | |
47 | #include "isisd/isis_dr.h" | |
eb5d44eb | 48 | #include "isisd/isisd.h" |
49 | #include "isisd/isis_dynhn.h" | |
50 | #include "isisd/isis_lsp.h" | |
51 | #include "isisd/isis_pdu.h" | |
52 | #include "isisd/iso_checksum.h" | |
53 | #include "isisd/isis_csm.h" | |
54 | #include "isisd/isis_events.h" | |
f8c06e2c | 55 | #include "isisd/isis_te.h" |
99894f9a | 56 | #include "isisd/isis_mt.h" |
841791b6 | 57 | #include "isisd/isis_tlvs.h" |
54ece698 | 58 | #include "isisd/isis_errors.h" |
8e6fb83b | 59 | #include "isisd/fabricd.h" |
9b39405f | 60 | #include "isisd/isis_tx_queue.h" |
eb5d44eb | 61 | |
af8ac8f9 CF |
62 | static int ack_lsp(struct isis_lsp_hdr *hdr, struct isis_circuit *circuit, |
63 | int level) | |
eb5d44eb | 64 | { |
af8ac8f9 CF |
65 | unsigned long lenp; |
66 | int retval; | |
d7c0a89a | 67 | uint16_t length; |
af8ac8f9 CF |
68 | uint8_t pdu_type = |
69 | (level == IS_LEVEL_1) ? L1_PARTIAL_SEQ_NUM : L2_PARTIAL_SEQ_NUM; | |
d62a17ae | 70 | |
af8ac8f9 | 71 | isis_circuit_stream(circuit, &circuit->snd_stream); |
3f045a08 | 72 | |
af8ac8f9 | 73 | fill_fixed_hdr(pdu_type, circuit->snd_stream); |
d62a17ae | 74 | |
af8ac8f9 CF |
75 | lenp = stream_get_endp(circuit->snd_stream); |
76 | stream_putw(circuit->snd_stream, 0); /* PDU length */ | |
77 | stream_put(circuit->snd_stream, isis->sysid, ISIS_SYS_ID_LEN); | |
78 | stream_putc(circuit->snd_stream, circuit->idx); | |
79 | stream_putc(circuit->snd_stream, 9); /* code */ | |
80 | stream_putc(circuit->snd_stream, 16); /* len */ | |
d62a17ae | 81 | |
af8ac8f9 CF |
82 | stream_putw(circuit->snd_stream, hdr->rem_lifetime); |
83 | stream_put(circuit->snd_stream, hdr->lsp_id, ISIS_SYS_ID_LEN + 2); | |
84 | stream_putl(circuit->snd_stream, hdr->seqno); | |
85 | stream_putw(circuit->snd_stream, hdr->checksum); | |
3f045a08 | 86 | |
d7c0a89a | 87 | length = (uint16_t)stream_get_endp(circuit->snd_stream); |
af8ac8f9 CF |
88 | /* Update PDU length */ |
89 | stream_putw_at(circuit->snd_stream, lenp, length); | |
3f045a08 | 90 | |
af8ac8f9 CF |
91 | retval = circuit->tx(circuit, level); |
92 | if (retval != ISIS_OK) | |
1a7ecb96 | 93 | flog_err(EC_ISIS_PACKET, |
1c50c1c0 QY |
94 | "ISIS-Upd (%s): Send L%d LSP PSNP on %s failed", |
95 | circuit->area->area_tag, level, | |
96 | circuit->interface->name); | |
d62a17ae | 97 | |
98 | return retval; | |
eb5d44eb | 99 | } |
100 | ||
eb5d44eb | 101 | /* |
d62a17ae | 102 | * RECEIVE SIDE |
eb5d44eb | 103 | */ |
104 | ||
0c1bd758 CF |
105 | struct iih_info { |
106 | struct isis_circuit *circuit; | |
d7c0a89a | 107 | uint8_t *ssnpa; |
0c1bd758 | 108 | int level; |
eb5d44eb | 109 | |
0c1bd758 CF |
110 | uint8_t circ_type; |
111 | uint8_t sys_id[ISIS_SYS_ID_LEN]; | |
112 | uint16_t holdtime; | |
113 | uint16_t pdu_len; | |
d62a17ae | 114 | |
0c1bd758 | 115 | uint8_t circuit_id; |
eb5d44eb | 116 | |
0c1bd758 CF |
117 | uint8_t priority; |
118 | uint8_t dis[ISIS_SYS_ID_LEN + 1]; | |
d8fba7d9 | 119 | |
0c1bd758 CF |
120 | bool v4_usable; |
121 | bool v6_usable; | |
eb5d44eb | 122 | |
0c1bd758 CF |
123 | struct isis_tlvs *tlvs; |
124 | }; | |
eb5d44eb | 125 | |
0c1bd758 CF |
126 | static int process_p2p_hello(struct iih_info *iih) |
127 | { | |
42fe2621 CF |
128 | struct isis_threeway_adj *tw_adj = iih->tlvs->threeway_adj; |
129 | if (tw_adj) { | |
130 | if (tw_adj->state > ISIS_THREEWAY_DOWN) { | |
131 | if (isis->debugs & DEBUG_ADJ_PACKETS) { | |
132 | zlog_debug("ISIS-Adj (%s): Rcvd P2P IIH from (%s) with invalid three-way state: %d\n", | |
133 | iih->circuit->area->area_tag, | |
134 | iih->circuit->interface->name, | |
135 | tw_adj->state); | |
136 | } | |
137 | return ISIS_WARNING; | |
138 | } | |
139 | ||
140 | if (tw_adj->neighbor_set | |
141 | && (memcmp(tw_adj->neighbor_id, isis->sysid, ISIS_SYS_ID_LEN) | |
142 | || tw_adj->neighbor_circuit_id != (uint32_t) iih->circuit->idx)) { | |
143 | ||
144 | if (isis->debugs & DEBUG_ADJ_PACKETS) { | |
145 | zlog_debug("ISIS-Adj (%s): Rcvd P2P IIH from (%s) which lists IS/Circuit different from us as neighbor.\n", | |
146 | iih->circuit->area->area_tag, | |
147 | iih->circuit->interface->name); | |
148 | } | |
149 | ||
150 | return ISIS_WARNING; | |
151 | } | |
152 | } | |
153 | ||
d62a17ae | 154 | /* |
155 | * My interpertation of the ISO, if no adj exists we will create one for | |
156 | * the circuit | |
157 | */ | |
0c1bd758 | 158 | struct isis_adjacency *adj = iih->circuit->u.p2p.neighbor; |
d62a17ae | 159 | /* If an adjacency exists, check it is with the source of the hello |
160 | * packets */ | |
161 | if (adj) { | |
0c1bd758 | 162 | if (memcmp(iih->sys_id, adj->sysid, ISIS_SYS_ID_LEN)) { |
d62a17ae | 163 | zlog_debug( |
164 | "hello source and adjacency do not match, set adj down\n"); | |
165 | isis_adj_state_change(adj, ISIS_ADJ_DOWN, | |
166 | "adj do not exist"); | |
0c1bd758 | 167 | return ISIS_OK; |
f390d2c7 | 168 | } |
d62a17ae | 169 | } |
0c1bd758 | 170 | if (!adj || adj->level != iih->circ_type) { |
d62a17ae | 171 | if (!adj) { |
0c1bd758 CF |
172 | adj = isis_new_adj(iih->sys_id, NULL, iih->circ_type, |
173 | iih->circuit); | |
d62a17ae | 174 | } else { |
0c1bd758 | 175 | adj->level = iih->circ_type; |
f390d2c7 | 176 | } |
0c1bd758 | 177 | iih->circuit->u.p2p.neighbor = adj; |
d62a17ae | 178 | /* Build lsp with the new neighbor entry when a new |
179 | * adjacency is formed. Set adjacency circuit type to | |
180 | * IIH PDU header circuit type before lsp is regenerated | |
181 | * when an adjacency is up. This will result in the new | |
182 | * adjacency entry getting added to the lsp tlv neighbor list. | |
183 | */ | |
0c1bd758 | 184 | adj->circuit_t = iih->circ_type; |
d62a17ae | 185 | isis_adj_state_change(adj, ISIS_ADJ_INITIALIZING, NULL); |
186 | adj->sys_type = ISIS_SYSTYPE_UNKNOWN; | |
f390d2c7 | 187 | } |
eb5d44eb | 188 | |
42fe2621 CF |
189 | if (tw_adj && adj->threeway_state == ISIS_THREEWAY_DOWN) |
190 | adj->ext_circuit_id = tw_adj->local_circuit_id; | |
191 | ||
d62a17ae | 192 | /* 8.2.6 Monitoring point-to-point adjacencies */ |
0c1bd758 | 193 | adj->hold_time = iih->holdtime; |
d62a17ae | 194 | adj->last_upd = time(NULL); |
195 | ||
0c1bd758 CF |
196 | bool changed; |
197 | isis_tlvs_to_adj(iih->tlvs, adj, &changed); | |
198 | changed |= tlvs_to_adj_mt_set(iih->tlvs, iih->v4_usable, iih->v6_usable, | |
199 | adj); | |
d62a17ae | 200 | |
201 | /* Update MPLS TE Remote IP address parameter if possible */ | |
0c1bd758 CF |
202 | if (IS_MPLS_TE(isisMplsTE) && iih->circuit->mtc |
203 | && IS_CIRCUIT_TE(iih->circuit->mtc) && adj->ipv4_address_count) | |
204 | set_circuitparams_rmt_ipaddr(iih->circuit->mtc, | |
205 | adj->ipv4_addresses[0]); | |
d62a17ae | 206 | |
207 | /* lets take care of the expiry */ | |
208 | THREAD_TIMER_OFF(adj->t_expire); | |
209 | thread_add_timer(master, isis_adj_expire, adj, (long)adj->hold_time, | |
210 | &adj->t_expire); | |
211 | ||
8e6fb83b CF |
212 | /* While fabricds initial sync is in progress, ignore hellos from other |
213 | * interfaces than the one we are performing the initial sync on. */ | |
214 | if (fabricd_initial_sync_is_in_progress(iih->circuit->area) | |
215 | && fabricd_initial_sync_circuit(iih->circuit->area) != iih->circuit) | |
216 | return ISIS_OK; | |
217 | ||
d62a17ae | 218 | /* 8.2.5.2 a) a match was detected */ |
0c1bd758 CF |
219 | if (isis_tlvs_area_addresses_match(iih->tlvs, |
220 | iih->circuit->area->area_addrs)) { | |
d62a17ae | 221 | /* 8.2.5.2 a) 2) If the system is L1 - table 5 */ |
0c1bd758 CF |
222 | if (iih->circuit->area->is_type == IS_LEVEL_1) { |
223 | switch (iih->circ_type) { | |
d62a17ae | 224 | case IS_LEVEL_1: |
225 | case IS_LEVEL_1_AND_2: | |
42fe2621 CF |
226 | if (adj->adj_state != ISIS_ADJ_UP |
227 | || adj->adj_usage == ISIS_ADJ_LEVEL1) { | |
228 | isis_adj_process_threeway(adj, tw_adj, | |
229 | ISIS_ADJ_LEVEL1); | |
d62a17ae | 230 | } |
231 | break; | |
232 | case IS_LEVEL_2: | |
233 | if (adj->adj_state != ISIS_ADJ_UP) { | |
234 | /* (7) reject - wrong system type event | |
235 | */ | |
236 | zlog_warn("wrongSystemType"); | |
0c1bd758 | 237 | return ISIS_WARNING; |
d62a17ae | 238 | } else if (adj->adj_usage == ISIS_ADJ_LEVEL1) { |
239 | /* (6) down - wrong system */ | |
240 | isis_adj_state_change(adj, | |
241 | ISIS_ADJ_DOWN, | |
242 | "Wrong System"); | |
243 | } | |
244 | break; | |
245 | } | |
f390d2c7 | 246 | } |
d62a17ae | 247 | |
248 | /* 8.2.5.2 a) 3) If the system is L1L2 - table 6 */ | |
0c1bd758 CF |
249 | if (iih->circuit->area->is_type == IS_LEVEL_1_AND_2) { |
250 | switch (iih->circ_type) { | |
d62a17ae | 251 | case IS_LEVEL_1: |
42fe2621 CF |
252 | if (adj->adj_state != ISIS_ADJ_UP |
253 | || adj->adj_usage == ISIS_ADJ_LEVEL1) { | |
254 | isis_adj_process_threeway(adj, tw_adj, | |
255 | ISIS_ADJ_LEVEL1); | |
d62a17ae | 256 | } else if ((adj->adj_usage |
257 | == ISIS_ADJ_LEVEL1AND2) | |
258 | || (adj->adj_usage | |
259 | == ISIS_ADJ_LEVEL2)) { | |
260 | /* (8) down - wrong system */ | |
261 | isis_adj_state_change(adj, | |
262 | ISIS_ADJ_DOWN, | |
263 | "Wrong System"); | |
264 | } | |
265 | break; | |
266 | case IS_LEVEL_2: | |
42fe2621 CF |
267 | if (adj->adj_state != ISIS_ADJ_UP |
268 | || adj->adj_usage == ISIS_ADJ_LEVEL2) { | |
269 | isis_adj_process_threeway(adj, tw_adj, | |
270 | ISIS_ADJ_LEVEL2); | |
d62a17ae | 271 | } else if ((adj->adj_usage == ISIS_ADJ_LEVEL1) |
272 | || (adj->adj_usage | |
273 | == ISIS_ADJ_LEVEL1AND2)) { | |
274 | /* (8) down - wrong system */ | |
275 | isis_adj_state_change(adj, | |
276 | ISIS_ADJ_DOWN, | |
277 | "Wrong System"); | |
d62a17ae | 278 | } |
279 | break; | |
280 | case IS_LEVEL_1_AND_2: | |
42fe2621 CF |
281 | if (adj->adj_state != ISIS_ADJ_UP |
282 | || adj->adj_usage == ISIS_ADJ_LEVEL1AND2) { | |
283 | isis_adj_process_threeway(adj, tw_adj, | |
284 | ISIS_ADJ_LEVEL1AND2); | |
d62a17ae | 285 | } else if ((adj->adj_usage == ISIS_ADJ_LEVEL1) |
286 | || (adj->adj_usage | |
287 | == ISIS_ADJ_LEVEL2)) { | |
288 | /* (8) down - wrong system */ | |
289 | isis_adj_state_change(adj, | |
290 | ISIS_ADJ_DOWN, | |
291 | "Wrong System"); | |
d62a17ae | 292 | } |
293 | break; | |
294 | } | |
f390d2c7 | 295 | } |
d62a17ae | 296 | |
297 | /* 8.2.5.2 a) 4) If the system is L2 - table 7 */ | |
0c1bd758 CF |
298 | if (iih->circuit->area->is_type == IS_LEVEL_2) { |
299 | switch (iih->circ_type) { | |
d62a17ae | 300 | case IS_LEVEL_1: |
301 | if (adj->adj_state != ISIS_ADJ_UP) { | |
302 | /* (5) reject - wrong system type event | |
303 | */ | |
304 | zlog_warn("wrongSystemType"); | |
0c1bd758 | 305 | return ISIS_WARNING; |
d62a17ae | 306 | } else if ((adj->adj_usage |
307 | == ISIS_ADJ_LEVEL1AND2) | |
308 | || (adj->adj_usage | |
309 | == ISIS_ADJ_LEVEL2)) { | |
310 | /* (6) down - wrong system */ | |
311 | isis_adj_state_change(adj, | |
312 | ISIS_ADJ_DOWN, | |
313 | "Wrong System"); | |
314 | } | |
315 | break; | |
316 | case IS_LEVEL_1_AND_2: | |
317 | case IS_LEVEL_2: | |
42fe2621 CF |
318 | if (adj->adj_state != ISIS_ADJ_UP |
319 | || adj->adj_usage == ISIS_ADJ_LEVEL2) { | |
320 | isis_adj_process_threeway(adj, tw_adj, | |
321 | ISIS_ADJ_LEVEL2); | |
d62a17ae | 322 | } else if (adj->adj_usage |
323 | == ISIS_ADJ_LEVEL1AND2) { | |
324 | /* (6) down - wrong system */ | |
325 | isis_adj_state_change(adj, | |
326 | ISIS_ADJ_DOWN, | |
327 | "Wrong System"); | |
d62a17ae | 328 | } |
329 | break; | |
330 | } | |
f390d2c7 | 331 | } |
d62a17ae | 332 | } |
333 | /* 8.2.5.2 b) if no match was detected */ | |
0c1bd758 CF |
334 | else if (listcount(iih->circuit->area->area_addrs) > 0) { |
335 | if (iih->circuit->area->is_type == IS_LEVEL_1) { | |
d62a17ae | 336 | /* 8.2.5.2 b) 1) is_type L1 and adj is not up */ |
337 | if (adj->adj_state != ISIS_ADJ_UP) { | |
338 | isis_adj_state_change(adj, ISIS_ADJ_DOWN, | |
339 | "Area Mismatch"); | |
340 | /* 8.2.5.2 b) 2)is_type L1 and adj is up */ | |
341 | } else { | |
342 | isis_adj_state_change(adj, ISIS_ADJ_DOWN, | |
343 | "Down - Area Mismatch"); | |
344 | } | |
f390d2c7 | 345 | } |
d62a17ae | 346 | /* 8.2.5.2 b 3 If the system is L2 or L1L2 - table 8 */ |
347 | else { | |
0c1bd758 | 348 | switch (iih->circ_type) { |
d62a17ae | 349 | case IS_LEVEL_1: |
350 | if (adj->adj_state != ISIS_ADJ_UP) { | |
351 | /* (6) reject - Area Mismatch event */ | |
352 | zlog_warn("AreaMismatch"); | |
0c1bd758 | 353 | return ISIS_WARNING; |
d62a17ae | 354 | } else if (adj->adj_usage == ISIS_ADJ_LEVEL1) { |
355 | /* (7) down - area mismatch */ | |
356 | isis_adj_state_change(adj, | |
357 | ISIS_ADJ_DOWN, | |
358 | "Area Mismatch"); | |
359 | ||
360 | } else if ((adj->adj_usage | |
361 | == ISIS_ADJ_LEVEL1AND2) | |
362 | || (adj->adj_usage | |
363 | == ISIS_ADJ_LEVEL2)) { | |
364 | /* (7) down - wrong system */ | |
365 | isis_adj_state_change(adj, | |
366 | ISIS_ADJ_DOWN, | |
367 | "Wrong System"); | |
368 | } | |
369 | break; | |
370 | case IS_LEVEL_1_AND_2: | |
371 | case IS_LEVEL_2: | |
42fe2621 CF |
372 | if (adj->adj_state != ISIS_ADJ_UP |
373 | || adj->adj_usage == ISIS_ADJ_LEVEL2) { | |
374 | isis_adj_process_threeway(adj, tw_adj, | |
375 | ISIS_ADJ_LEVEL2); | |
d62a17ae | 376 | } else if (adj->adj_usage == ISIS_ADJ_LEVEL1) { |
377 | /* (7) down - wrong system */ | |
378 | isis_adj_state_change(adj, | |
379 | ISIS_ADJ_DOWN, | |
380 | "Wrong System"); | |
381 | } else if (adj->adj_usage | |
382 | == ISIS_ADJ_LEVEL1AND2) { | |
0c1bd758 | 383 | if (iih->circ_type == IS_LEVEL_2) { |
d62a17ae | 384 | /* (7) down - wrong system */ |
385 | isis_adj_state_change( | |
386 | adj, ISIS_ADJ_DOWN, | |
387 | "Wrong System"); | |
388 | } else { | |
389 | /* (7) down - area mismatch */ | |
390 | isis_adj_state_change( | |
391 | adj, ISIS_ADJ_DOWN, | |
392 | "Area Mismatch"); | |
393 | } | |
d62a17ae | 394 | } |
395 | break; | |
396 | } | |
f390d2c7 | 397 | } |
d62a17ae | 398 | } else { |
399 | /* down - area mismatch */ | |
400 | isis_adj_state_change(adj, ISIS_ADJ_DOWN, "Area Mismatch"); | |
f390d2c7 | 401 | } |
d8fba7d9 | 402 | |
0c1bd758 | 403 | if (adj->adj_state == ISIS_ADJ_UP && changed) { |
d62a17ae | 404 | lsp_regenerate_schedule(adj->circuit->area, |
405 | isis_adj_usage2levels(adj->adj_usage), | |
406 | 0); | |
407 | } | |
eb5d44eb | 408 | |
d62a17ae | 409 | /* 8.2.5.2 c) if the action was up - comparing circuit IDs */ |
410 | /* FIXME - Missing parts */ | |
411 | ||
412 | /* some of my own understanding of the ISO, why the heck does | |
413 | * it not say what should I change the system_type to... | |
414 | */ | |
415 | switch (adj->adj_usage) { | |
416 | case ISIS_ADJ_LEVEL1: | |
417 | adj->sys_type = ISIS_SYSTYPE_L1_IS; | |
418 | break; | |
419 | case ISIS_ADJ_LEVEL2: | |
420 | adj->sys_type = ISIS_SYSTYPE_L2_IS; | |
421 | break; | |
422 | case ISIS_ADJ_LEVEL1AND2: | |
423 | adj->sys_type = ISIS_SYSTYPE_L2_IS; | |
424 | break; | |
425 | case ISIS_ADJ_NONE: | |
426 | adj->sys_type = ISIS_SYSTYPE_UNKNOWN; | |
427 | break; | |
428 | } | |
eb5d44eb | 429 | |
d62a17ae | 430 | if (isis->debugs & DEBUG_ADJ_PACKETS) { |
431 | zlog_debug( | |
432 | "ISIS-Adj (%s): Rcvd P2P IIH from (%s), cir type %s," | |
c59f88c8 | 433 | " cir id %hhu, length %" PRIu16, |
0c1bd758 CF |
434 | iih->circuit->area->area_tag, |
435 | iih->circuit->interface->name, | |
436 | circuit_t2string(iih->circuit->is_type), | |
437 | iih->circuit->circuit_id, iih->pdu_len); | |
d62a17ae | 438 | } |
eb5d44eb | 439 | |
0c1bd758 | 440 | return ISIS_OK; |
eb5d44eb | 441 | } |
442 | ||
0c1bd758 | 443 | static int process_lan_hello(struct iih_info *iih) |
eb5d44eb | 444 | { |
d62a17ae | 445 | struct isis_adjacency *adj; |
0c1bd758 CF |
446 | adj = isis_adj_lookup(iih->sys_id, |
447 | iih->circuit->u.bc.adjdb[iih->level - 1]); | |
448 | if ((adj == NULL) || (memcmp(adj->snpa, iih->ssnpa, ETH_ALEN)) | |
449 | || (adj->level != iih->level)) { | |
450 | if (!adj) { | |
451 | /* Do as in 8.4.2.5 */ | |
452 | adj = isis_new_adj(iih->sys_id, iih->ssnpa, iih->level, | |
453 | iih->circuit); | |
454 | } else { | |
455 | if (iih->ssnpa) { | |
456 | memcpy(adj->snpa, iih->ssnpa, 6); | |
457 | } else { | |
458 | memset(adj->snpa, ' ', 6); | |
459 | } | |
460 | adj->level = iih->level; | |
461 | } | |
462 | isis_adj_state_change(adj, ISIS_ADJ_INITIALIZING, NULL); | |
d62a17ae | 463 | |
0c1bd758 CF |
464 | if (iih->level == IS_LEVEL_1) |
465 | adj->sys_type = ISIS_SYSTYPE_L1_IS; | |
466 | else | |
467 | adj->sys_type = ISIS_SYSTYPE_L2_IS; | |
468 | list_delete_all_node( | |
469 | iih->circuit->u.bc.lan_neighs[iih->level - 1]); | |
470 | isis_adj_build_neigh_list( | |
471 | iih->circuit->u.bc.adjdb[iih->level - 1], | |
472 | iih->circuit->u.bc.lan_neighs[iih->level - 1]); | |
473 | } | |
474 | ||
475 | if (adj->dis_record[iih->level - 1].dis == ISIS_IS_DIS) { | |
d7c0a89a QY |
476 | uint8_t *dis = (iih->level == 1) |
477 | ? iih->circuit->u.bc.l1_desig_is | |
478 | : iih->circuit->u.bc.l2_desig_is; | |
0c1bd758 CF |
479 | |
480 | if (memcmp(dis, iih->dis, ISIS_SYS_ID_LEN + 1)) { | |
481 | thread_add_event(master, isis_event_dis_status_change, | |
482 | iih->circuit, 0, NULL); | |
483 | memcpy(dis, iih->dis, ISIS_SYS_ID_LEN + 1); | |
484 | } | |
d62a17ae | 485 | } |
3f045a08 | 486 | |
0c1bd758 CF |
487 | adj->circuit_t = iih->circ_type; |
488 | adj->hold_time = iih->holdtime; | |
489 | adj->last_upd = time(NULL); | |
490 | adj->prio[iih->level - 1] = iih->priority; | |
491 | memcpy(adj->lanid, iih->dis, ISIS_SYS_ID_LEN + 1); | |
3f045a08 | 492 | |
0c1bd758 CF |
493 | bool changed; |
494 | isis_tlvs_to_adj(iih->tlvs, adj, &changed); | |
495 | changed |= tlvs_to_adj_mt_set(iih->tlvs, iih->v4_usable, iih->v6_usable, | |
496 | adj); | |
497 | ||
498 | /* lets take care of the expiry */ | |
499 | THREAD_TIMER_OFF(adj->t_expire); | |
500 | thread_add_timer(master, isis_adj_expire, adj, (long)adj->hold_time, | |
501 | &adj->t_expire); | |
502 | ||
503 | /* | |
504 | * If the snpa for this circuit is found from LAN Neighbours TLV | |
505 | * we have two-way communication -> adjacency can be put to state "up" | |
506 | */ | |
507 | bool own_snpa_found = | |
508 | isis_tlvs_own_snpa_found(iih->tlvs, iih->circuit->u.bc.snpa); | |
509 | ||
510 | if (adj->adj_state != ISIS_ADJ_UP) { | |
511 | if (own_snpa_found) { | |
512 | isis_adj_state_change( | |
513 | adj, ISIS_ADJ_UP, | |
514 | "own SNPA found in LAN Neighbours TLV"); | |
515 | } | |
516 | } else { | |
517 | if (!own_snpa_found) { | |
518 | isis_adj_state_change( | |
519 | adj, ISIS_ADJ_INITIALIZING, | |
520 | "own SNPA not found in LAN Neighbours TLV"); | |
521 | } | |
d62a17ae | 522 | } |
eb5d44eb | 523 | |
0c1bd758 CF |
524 | if (adj->adj_state == ISIS_ADJ_UP && changed) |
525 | lsp_regenerate_schedule(adj->circuit->area, iih->level, 0); | |
526 | ||
527 | if (isis->debugs & DEBUG_ADJ_PACKETS) { | |
d62a17ae | 528 | zlog_debug( |
0c1bd758 CF |
529 | "ISIS-Adj (%s): Rcvd L%d LAN IIH from %s on %s, cirType %s, cirID %u, length %zd", |
530 | iih->circuit->area->area_tag, iih->level, | |
531 | snpa_print(iih->ssnpa), iih->circuit->interface->name, | |
532 | circuit_t2string(iih->circuit->is_type), | |
533 | iih->circuit->circuit_id, | |
534 | stream_get_endp(iih->circuit->rcv_stream)); | |
d62a17ae | 535 | } |
0c1bd758 CF |
536 | return ISIS_OK; |
537 | } | |
eb5d44eb | 538 | |
17c9dcd5 CF |
539 | static int pdu_len_validate(uint16_t pdu_len, struct isis_circuit *circuit) |
540 | { | |
541 | if (pdu_len < stream_get_getp(circuit->rcv_stream) | |
542 | || pdu_len > ISO_MTU(circuit) | |
543 | || pdu_len > stream_get_endp(circuit->rcv_stream)) | |
544 | return 1; | |
545 | ||
546 | if (pdu_len < stream_get_endp(circuit->rcv_stream)) | |
547 | stream_set_endp(circuit->rcv_stream, pdu_len); | |
548 | return 0; | |
549 | } | |
550 | ||
0c1bd758 | 551 | static int process_hello(uint8_t pdu_type, struct isis_circuit *circuit, |
d7c0a89a | 552 | uint8_t *ssnpa) |
0c1bd758 CF |
553 | { |
554 | bool p2p_hello = (pdu_type == P2P_HELLO); | |
555 | int level = p2p_hello ? 0 | |
556 | : (pdu_type == L1_LAN_HELLO) ? ISIS_LEVEL1 | |
557 | : ISIS_LEVEL2; | |
558 | const char *pdu_name = | |
559 | p2p_hello | |
560 | ? "P2P IIH" | |
561 | : (level == ISIS_LEVEL1) ? "L1 LAN IIH" : "L2 LAN IIH"; | |
562 | ||
563 | if (isis->debugs & DEBUG_ADJ_PACKETS) { | |
564 | zlog_debug("ISIS-Adj (%s): Rcvd %s on %s, cirType %s, cirID %u", | |
565 | circuit->area->area_tag, pdu_name, | |
566 | circuit->interface->name, | |
567 | circuit_t2string(circuit->is_type), | |
568 | circuit->circuit_id); | |
569 | if (isis->debugs & DEBUG_PACKET_DUMP) | |
570 | zlog_dump_data(STREAM_DATA(circuit->rcv_stream), | |
571 | stream_get_endp(circuit->rcv_stream)); | |
572 | } | |
573 | ||
574 | if (p2p_hello) { | |
575 | if (circuit->circ_type != CIRCUIT_T_P2P) { | |
576 | zlog_warn("p2p hello on non p2p circuit"); | |
577 | return ISIS_WARNING; | |
578 | } | |
579 | } else { | |
580 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) { | |
581 | zlog_warn("lan hello on non broadcast circuit"); | |
582 | return ISIS_WARNING; | |
583 | } | |
584 | ||
585 | if (circuit->ext_domain) { | |
d62a17ae | 586 | zlog_debug( |
0c1bd758 CF |
587 | "level %d LAN Hello received over circuit with externalDomain = true", |
588 | level); | |
589 | return ISIS_WARNING; | |
590 | } | |
591 | ||
af8ac8f9 | 592 | if (!(circuit->is_type & level)) { |
0c1bd758 CF |
593 | if (isis->debugs & DEBUG_ADJ_PACKETS) { |
594 | zlog_debug( | |
595 | "ISIS-Adj (%s): Interface level mismatch, %s", | |
596 | circuit->area->area_tag, | |
597 | circuit->interface->name); | |
598 | } | |
599 | return ISIS_WARNING; | |
d62a17ae | 600 | } |
f390d2c7 | 601 | } |
eb5d44eb | 602 | |
0c1bd758 CF |
603 | struct iih_info iih = { |
604 | .circuit = circuit, .ssnpa = ssnpa, .level = level}; | |
605 | ||
606 | /* Generic IIH Header */ | |
607 | iih.circ_type = stream_getc(circuit->rcv_stream) & 0x03; | |
608 | stream_get(iih.sys_id, circuit->rcv_stream, ISIS_SYS_ID_LEN); | |
609 | iih.holdtime = stream_getw(circuit->rcv_stream); | |
610 | iih.pdu_len = stream_getw(circuit->rcv_stream); | |
611 | ||
612 | if (p2p_hello) { | |
613 | iih.circuit_id = stream_getc(circuit->rcv_stream); | |
614 | } else { | |
615 | iih.priority = stream_getc(circuit->rcv_stream); | |
616 | stream_get(iih.dis, circuit->rcv_stream, ISIS_SYS_ID_LEN + 1); | |
f390d2c7 | 617 | } |
0c1bd758 | 618 | |
17c9dcd5 | 619 | if (pdu_len_validate(iih.pdu_len, circuit)) { |
d62a17ae | 620 | zlog_warn( |
0c1bd758 CF |
621 | "ISIS-Adj (%s): Rcvd %s from (%s) with invalid pdu length %" PRIu16, |
622 | circuit->area->area_tag, pdu_name, | |
623 | circuit->interface->name, iih.pdu_len); | |
d62a17ae | 624 | return ISIS_WARNING; |
625 | } | |
3f045a08 | 626 | |
0c1bd758 | 627 | if (!p2p_hello && !(level & iih.circ_type)) { |
1a7ecb96 | 628 | flog_err(EC_ISIS_PACKET, |
1c50c1c0 QY |
629 | "Level %d LAN Hello with Circuit Type %d", level, |
630 | iih.circ_type); | |
d62a17ae | 631 | return ISIS_ERROR; |
632 | } | |
3f045a08 | 633 | |
0c1bd758 CF |
634 | const char *error_log; |
635 | int retval = ISIS_WARNING; | |
d62a17ae | 636 | |
0c1bd758 CF |
637 | if (isis_unpack_tlvs(STREAM_READABLE(circuit->rcv_stream), |
638 | circuit->rcv_stream, &iih.tlvs, &error_log)) { | |
639 | zlog_warn("isis_unpack_tlvs() failed: %s", error_log); | |
d62a17ae | 640 | goto out; |
641 | } | |
eb5d44eb | 642 | |
0c1bd758 CF |
643 | if (!iih.tlvs->area_addresses.count) { |
644 | zlog_warn("No Area addresses TLV in %s", pdu_name); | |
d62a17ae | 645 | goto out; |
646 | } | |
f390d2c7 | 647 | |
0c1bd758 CF |
648 | if (!iih.tlvs->protocols_supported.count) { |
649 | zlog_warn("No supported protocols TLV in %s", pdu_name); | |
d62a17ae | 650 | goto out; |
651 | } | |
b72f345d | 652 | |
0c1bd758 | 653 | if (!isis_tlvs_auth_is_valid(iih.tlvs, &circuit->passwd, |
af8ac8f9 | 654 | circuit->rcv_stream, false)) { |
0c1bd758 CF |
655 | isis_event_auth_failure(circuit->area->area_tag, |
656 | "IIH authentication failure", | |
657 | iih.sys_id); | |
658 | goto out; | |
d62a17ae | 659 | } |
eb5d44eb | 660 | |
0c1bd758 CF |
661 | if (!memcmp(iih.sys_id, isis->sysid, ISIS_SYS_ID_LEN)) { |
662 | zlog_warn( | |
663 | "ISIS-Adj (%s): Received IIH with own sysid - discard", | |
664 | circuit->area->area_tag); | |
665 | goto out; | |
d62a17ae | 666 | } |
19f78ceb | 667 | |
0c1bd758 CF |
668 | if (!p2p_hello |
669 | && (listcount(circuit->area->area_addrs) == 0 | |
670 | || (level == ISIS_LEVEL1 | |
671 | && !isis_tlvs_area_addresses_match( | |
672 | iih.tlvs, circuit->area->area_addrs)))) { | |
d62a17ae | 673 | if (isis->debugs & DEBUG_ADJ_PACKETS) { |
674 | zlog_debug( | |
675 | "ISIS-Adj (%s): Area mismatch, level %d IIH on %s", | |
676 | circuit->area->area_tag, level, | |
677 | circuit->interface->name); | |
678 | } | |
d62a17ae | 679 | goto out; |
f390d2c7 | 680 | } |
eb5d44eb | 681 | |
41415888 | 682 | iih.v4_usable = (fabricd_ip_addrs(circuit) |
0c1bd758 | 683 | && iih.tlvs->ipv4_address.count); |
d62a17ae | 684 | |
0c1bd758 CF |
685 | iih.v6_usable = (circuit->ipv6_link && listcount(circuit->ipv6_link) |
686 | && iih.tlvs->ipv6_address.count); | |
28a8cfcb | 687 | |
c9b0e434 CF |
688 | if (!iih.v4_usable && !iih.v6_usable) { |
689 | if (isis->debugs & DEBUG_ADJ_PACKETS) { | |
690 | zlog_warn( | |
691 | "ISIS-Adj (%s): Neither IPv4 nor IPv6 considered usable. Ignoring IIH", | |
692 | circuit->area->area_tag); | |
693 | } | |
694 | ||
d62a17ae | 695 | goto out; |
c9b0e434 | 696 | } |
d8fba7d9 | 697 | |
0c1bd758 | 698 | retval = p2p_hello ? process_p2p_hello(&iih) : process_lan_hello(&iih); |
f390d2c7 | 699 | out: |
0c1bd758 | 700 | isis_free_tlvs(iih.tlvs); |
eb5d44eb | 701 | |
d62a17ae | 702 | return retval; |
eb5d44eb | 703 | } |
704 | ||
705 | /* | |
706 | * Process Level 1/2 Link State | |
707 | * ISO - 10589 | |
708 | * Section 7.3.15.1 - Action on receipt of a link state PDU | |
f390d2c7 | 709 | */ |
af8ac8f9 | 710 | static int process_lsp(uint8_t pdu_type, struct isis_circuit *circuit, |
9b39405f | 711 | const uint8_t *ssnpa, uint8_t max_area_addrs) |
eb5d44eb | 712 | { |
1cbd5b37 CF |
713 | int level; |
714 | bool circuit_scoped; | |
715 | ||
716 | if (pdu_type == FS_LINK_STATE) { | |
717 | if (!fabricd) | |
718 | return ISIS_ERROR; | |
719 | if (max_area_addrs != L2_CIRCUIT_FLOODING_SCOPE) | |
720 | return ISIS_ERROR; | |
721 | level = ISIS_LEVEL2; | |
722 | circuit_scoped = true; | |
723 | ||
724 | /* The stream is used verbatim for sending out new LSPDUs. | |
725 | * So make sure we store it as an L2 LSPDU internally. | |
726 | * (compare for the reverse in `send_lsp`) */ | |
727 | stream_putc_at(circuit->rcv_stream, 4, L2_LINK_STATE); | |
728 | stream_putc_at(circuit->rcv_stream, 7, 0); | |
729 | } else { | |
730 | if (pdu_type == L1_LINK_STATE) | |
731 | level = ISIS_LEVEL1; | |
732 | else | |
733 | level = ISIS_LEVEL2; | |
734 | circuit_scoped = false; | |
735 | } | |
d62a17ae | 736 | |
737 | if (isis->debugs & DEBUG_UPDATE_PACKETS) { | |
738 | zlog_debug( | |
1cbd5b37 CF |
739 | "ISIS-Upd (%s): Rcvd %sL%d LSP on %s, cirType %s, cirID %u", |
740 | circuit->area->area_tag, | |
741 | circuit_scoped ? "Circuit scoped " : "", level, | |
d62a17ae | 742 | circuit->interface->name, |
743 | circuit_t2string(circuit->is_type), | |
744 | circuit->circuit_id); | |
745 | if (isis->debugs & DEBUG_PACKET_DUMP) | |
746 | zlog_dump_data(STREAM_DATA(circuit->rcv_stream), | |
747 | stream_get_endp(circuit->rcv_stream)); | |
748 | } | |
f390d2c7 | 749 | |
48944eb6 | 750 | struct isis_lsp_hdr hdr = {0}; |
eb5d44eb | 751 | |
af8ac8f9 CF |
752 | hdr.pdu_len = stream_getw(circuit->rcv_stream); |
753 | hdr.rem_lifetime = stream_getw(circuit->rcv_stream); | |
754 | stream_get(hdr.lsp_id, circuit->rcv_stream, sizeof(hdr.lsp_id)); | |
755 | hdr.seqno = stream_getl(circuit->rcv_stream); | |
756 | hdr.checksum = stream_getw(circuit->rcv_stream); | |
757 | hdr.lsp_bits = stream_getc(circuit->rcv_stream); | |
eb5d44eb | 758 | |
af8ac8f9 CF |
759 | if (pdu_len_validate(hdr.pdu_len, circuit)) { |
760 | zlog_debug("ISIS-Upd (%s): LSP %s invalid LSP length %" PRIu16, | |
761 | circuit->area->area_tag, rawlspid_print(hdr.lsp_id), | |
762 | hdr.pdu_len); | |
d62a17ae | 763 | return ISIS_WARNING; |
f390d2c7 | 764 | } |
d62a17ae | 765 | |
d62a17ae | 766 | if (isis->debugs & DEBUG_UPDATE_PACKETS) { |
af8ac8f9 CF |
767 | zlog_debug("ISIS-Upd (%s): Rcvd L%d LSP %s, seq 0x%08" PRIx32 |
768 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 | |
769 | "s, len %" PRIu16 ", on %s", | |
770 | circuit->area->area_tag, level, | |
771 | rawlspid_print(hdr.lsp_id), hdr.seqno, hdr.checksum, | |
772 | hdr.rem_lifetime, hdr.pdu_len, | |
773 | circuit->interface->name); | |
f390d2c7 | 774 | } |
d62a17ae | 775 | |
776 | /* lsp is_type check */ | |
af8ac8f9 CF |
777 | if ((hdr.lsp_bits & IS_LEVEL_1) != IS_LEVEL_1) { |
778 | zlog_debug( | |
779 | "ISIS-Upd (%s): LSP %s invalid LSP is type 0x%" PRIx8, | |
780 | circuit->area->area_tag, rawlspid_print(hdr.lsp_id), | |
781 | hdr.lsp_bits & IS_LEVEL_1_AND_2); | |
d62a17ae | 782 | /* continue as per RFC1122 Be liberal in what you accept, and |
783 | * conservative in what you send */ | |
f390d2c7 | 784 | } |
d62a17ae | 785 | |
786 | /* Checksum sanity check - FIXME: move to correct place */ | |
787 | /* 12 = sysid+pdu+remtime */ | |
af8ac8f9 CF |
788 | if (iso_csum_verify(STREAM_DATA(circuit->rcv_stream) + 12, |
789 | hdr.pdu_len - 12, hdr.checksum, 12)) { | |
790 | zlog_debug( | |
791 | "ISIS-Upd (%s): LSP %s invalid LSP checksum 0x%04" PRIx16, | |
792 | circuit->area->area_tag, rawlspid_print(hdr.lsp_id), | |
793 | hdr.checksum); | |
d62a17ae | 794 | return ISIS_WARNING; |
f390d2c7 | 795 | } |
3f045a08 | 796 | |
d62a17ae | 797 | /* 7.3.15.1 a) 1 - external domain circuit will discard lsps */ |
798 | if (circuit->ext_domain) { | |
799 | zlog_debug( | |
800 | "ISIS-Upd (%s): LSP %s received at level %d over circuit with " | |
801 | "externalDomain = true", | |
af8ac8f9 | 802 | circuit->area->area_tag, rawlspid_print(hdr.lsp_id), |
d62a17ae | 803 | level); |
d62a17ae | 804 | return ISIS_WARNING; |
805 | } | |
eb5d44eb | 806 | |
d62a17ae | 807 | /* 7.3.15.1 a) 2,3 - manualL2OnlyMode not implemented */ |
af8ac8f9 | 808 | if (!(circuit->is_type & level)) { |
d62a17ae | 809 | zlog_debug( |
810 | "ISIS-Upd (%s): LSP %s received at level %d over circuit of" | |
811 | " type %s", | |
af8ac8f9 | 812 | circuit->area->area_tag, rawlspid_print(hdr.lsp_id), |
d62a17ae | 813 | level, circuit_t2string(circuit->is_type)); |
d62a17ae | 814 | return ISIS_WARNING; |
815 | } | |
0250758d | 816 | |
af8ac8f9 CF |
817 | struct isis_tlvs *tlvs = NULL; |
818 | int retval = ISIS_WARNING; | |
819 | const char *error_log; | |
820 | ||
821 | if (isis_unpack_tlvs(STREAM_READABLE(circuit->rcv_stream), | |
822 | circuit->rcv_stream, &tlvs, &error_log)) { | |
823 | zlog_warn("Something went wrong unpacking the LSP: %s", | |
824 | error_log); | |
825 | goto out; | |
826 | } | |
827 | ||
d62a17ae | 828 | /* 7.3.15.1 a) 4 - need to make sure IDLength matches */ |
829 | ||
830 | /* 7.3.15.1 a) 5 - maximum area match, can be ommited since we only use | |
831 | * 3 */ | |
832 | ||
833 | /* 7.3.15.1 a) 7 - password check */ | |
af8ac8f9 CF |
834 | struct isis_passwd *passwd = (level == ISIS_LEVEL1) |
835 | ? &circuit->area->area_passwd | |
836 | : &circuit->area->domain_passwd; | |
837 | if (!isis_tlvs_auth_is_valid(tlvs, passwd, circuit->rcv_stream, true)) { | |
838 | isis_event_auth_failure(circuit->area->area_tag, | |
839 | "LSP authentication failure", | |
840 | hdr.lsp_id); | |
841 | goto out; | |
f390d2c7 | 842 | } |
af8ac8f9 | 843 | |
d62a17ae | 844 | /* Find the LSP in our database and compare it to this Link State header |
845 | */ | |
af8ac8f9 CF |
846 | struct isis_lsp *lsp = |
847 | lsp_search(hdr.lsp_id, circuit->area->lspdb[level - 1]); | |
848 | int comp = 0; | |
d62a17ae | 849 | if (lsp) |
af8ac8f9 CF |
850 | comp = lsp_compare(circuit->area->area_tag, lsp, hdr.seqno, |
851 | hdr.checksum, hdr.rem_lifetime); | |
d62a17ae | 852 | if (lsp && (lsp->own_lsp)) |
853 | goto dontcheckadj; | |
854 | ||
855 | /* 7.3.15.1 a) 6 - Must check that we have an adjacency of the same | |
856 | * level */ | |
857 | /* for broadcast circuits, snpa should be compared */ | |
858 | ||
859 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) { | |
af8ac8f9 CF |
860 | if (!isis_adj_lookup_snpa(ssnpa, |
861 | circuit->u.bc.adjdb[level - 1])) { | |
862 | zlog_debug("(%s): DS ======= LSP %s, seq 0x%08" PRIx32 | |
863 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 | |
864 | "s on %s", | |
865 | circuit->area->area_tag, | |
866 | rawlspid_print(hdr.lsp_id), hdr.seqno, | |
867 | hdr.checksum, hdr.rem_lifetime, | |
868 | circuit->interface->name); | |
869 | goto out; /* Silently discard */ | |
d62a17ae | 870 | } |
871 | } | |
872 | /* for non broadcast, we just need to find same level adj */ | |
873 | else { | |
874 | /* If no adj, or no sharing of level */ | |
875 | if (!circuit->u.p2p.neighbor) { | |
af8ac8f9 CF |
876 | retval = ISIS_OK; |
877 | goto out; | |
d62a17ae | 878 | } else { |
879 | if (((level == IS_LEVEL_1) | |
880 | && (circuit->u.p2p.neighbor->adj_usage | |
881 | == ISIS_ADJ_LEVEL2)) | |
882 | || ((level == IS_LEVEL_2) | |
883 | && (circuit->u.p2p.neighbor->adj_usage | |
884 | == ISIS_ADJ_LEVEL1))) | |
af8ac8f9 | 885 | goto out; |
f390d2c7 | 886 | } |
f390d2c7 | 887 | } |
f390d2c7 | 888 | |
af8ac8f9 CF |
889 | bool lsp_confusion; |
890 | ||
d62a17ae | 891 | dontcheckadj: |
892 | /* 7.3.15.1 a) 7 - Passwords for level 1 - not implemented */ | |
893 | ||
894 | /* 7.3.15.1 a) 8 - Passwords for level 2 - not implemented */ | |
895 | ||
896 | /* 7.3.15.1 a) 9 - OriginatingLSPBufferSize - not implemented FIXME: do | |
897 | * it */ | |
898 | ||
899 | /* 7.3.16.2 - If this is an LSP from another IS with identical seq_num | |
900 | * but | |
901 | * wrong checksum, initiate a purge. */ | |
af8ac8f9 | 902 | if (lsp && (lsp->hdr.seqno == hdr.seqno) |
2c92bee4 CF |
903 | && (lsp->hdr.checksum != hdr.checksum) |
904 | && hdr.rem_lifetime) { | |
af8ac8f9 CF |
905 | zlog_warn("ISIS-Upd (%s): LSP %s seq 0x%08" PRIx32 |
906 | " with confused checksum received.", | |
907 | circuit->area->area_tag, rawlspid_print(hdr.lsp_id), | |
908 | hdr.seqno); | |
909 | hdr.rem_lifetime = 0; | |
910 | lsp_confusion = true; | |
d62a17ae | 911 | } else |
af8ac8f9 | 912 | lsp_confusion = false; |
d62a17ae | 913 | |
914 | /* 7.3.15.1 b) - If the remaining life time is 0, we perform 7.3.16.4 */ | |
af8ac8f9 | 915 | if (hdr.rem_lifetime == 0) { |
d62a17ae | 916 | if (!lsp) { |
917 | /* 7.3.16.4 a) 1) No LSP in db -> send an ack, but don't | |
918 | * save */ | |
919 | /* only needed on explicit update, eg - p2p */ | |
920 | if (circuit->circ_type == CIRCUIT_T_P2P) | |
af8ac8f9 CF |
921 | ack_lsp(&hdr, circuit, level); |
922 | goto out; /* FIXME: do we need a purge? */ | |
d62a17ae | 923 | } else { |
af8ac8f9 | 924 | if (memcmp(hdr.lsp_id, isis->sysid, ISIS_SYS_ID_LEN)) { |
d62a17ae | 925 | /* LSP by some other system -> do 7.3.16.4 b) */ |
926 | /* 7.3.16.4 b) 1) */ | |
927 | if (comp == LSP_NEWER) { | |
af8ac8f9 CF |
928 | lsp_update(lsp, &hdr, tlvs, |
929 | circuit->rcv_stream, | |
164066e4 CF |
930 | circuit->area, level, |
931 | lsp_confusion); | |
af8ac8f9 | 932 | tlvs = NULL; |
d62a17ae | 933 | /* ii */ |
1cbd5b37 CF |
934 | if (!circuit_scoped) |
935 | lsp_flood(lsp, NULL); | |
d62a17ae | 936 | /* v */ |
937 | ISIS_FLAGS_CLEAR_ALL( | |
996c9314 LB |
938 | lsp->SSNflags); /* FIXME: |
939 | OTHER | |
940 | than c | |
941 | */ | |
d62a17ae | 942 | |
943 | /* For the case of lsp confusion, flood | |
944 | * the purge back to its | |
945 | * originator so that it can react. | |
946 | * Otherwise, don't reflood | |
947 | * through incoming circuit as usual */ | |
948 | if (!lsp_confusion) { | |
9b39405f CF |
949 | isis_tx_queue_del( |
950 | circuit->tx_queue, | |
951 | lsp); | |
952 | ||
d62a17ae | 953 | /* iv */ |
954 | if (circuit->circ_type | |
955 | != CIRCUIT_T_BROADCAST) | |
956 | ISIS_SET_FLAG( | |
957 | lsp->SSNflags, | |
958 | circuit); | |
959 | } | |
960 | } /* 7.3.16.4 b) 2) */ | |
961 | else if (comp == LSP_EQUAL) { | |
962 | /* i */ | |
9b39405f CF |
963 | isis_tx_queue_del(circuit->tx_queue, |
964 | lsp); | |
d62a17ae | 965 | /* ii */ |
966 | if (circuit->circ_type | |
967 | != CIRCUIT_T_BROADCAST) | |
968 | ISIS_SET_FLAG(lsp->SSNflags, | |
969 | circuit); | |
970 | } /* 7.3.16.4 b) 3) */ | |
971 | else { | |
9b39405f CF |
972 | isis_tx_queue_add(circuit->tx_queue, |
973 | lsp, TX_LSP_NORMAL); | |
d62a17ae | 974 | ISIS_CLEAR_FLAG(lsp->SSNflags, circuit); |
975 | } | |
af8ac8f9 | 976 | } else if (lsp->hdr.rem_lifetime != 0) { |
d62a17ae | 977 | /* our own LSP -> 7.3.16.4 c) */ |
978 | if (comp == LSP_NEWER) { | |
af8ac8f9 | 979 | lsp_inc_seqno(lsp, hdr.seqno); |
1cbd5b37 CF |
980 | if (!circuit_scoped) |
981 | lsp_flood(lsp, NULL); | |
d62a17ae | 982 | } else { |
9b39405f CF |
983 | isis_tx_queue_add(circuit->tx_queue, |
984 | lsp, TX_LSP_NORMAL); | |
d62a17ae | 985 | ISIS_CLEAR_FLAG(lsp->SSNflags, circuit); |
986 | } | |
987 | if (isis->debugs & DEBUG_UPDATE_PACKETS) | |
988 | zlog_debug( | |
af8ac8f9 | 989 | "ISIS-Upd (%s): (1) re-originating LSP %s new seq 0x%08" PRIx32, |
d62a17ae | 990 | circuit->area->area_tag, |
af8ac8f9 CF |
991 | rawlspid_print(hdr.lsp_id), |
992 | lsp->hdr.seqno); | |
d62a17ae | 993 | } |
f390d2c7 | 994 | } |
af8ac8f9 | 995 | goto out; |
f390d2c7 | 996 | } |
d62a17ae | 997 | /* 7.3.15.1 c) - If this is our own lsp and we don't have it initiate a |
998 | * purge */ | |
af8ac8f9 | 999 | if (memcmp(hdr.lsp_id, isis->sysid, ISIS_SYS_ID_LEN) == 0) { |
d62a17ae | 1000 | if (!lsp) { |
1001 | /* 7.3.16.4: initiate a purge */ | |
af8ac8f9 CF |
1002 | lsp_purge_non_exist(level, &hdr, circuit->area); |
1003 | retval = ISIS_OK; | |
1004 | goto out; | |
d62a17ae | 1005 | } |
1006 | /* 7.3.15.1 d) - If this is our own lsp and we have it */ | |
1007 | ||
1008 | /* In 7.3.16.1, If an Intermediate system R somewhere in the | |
1009 | * domain | |
1010 | * has information that the current sequence number for source S | |
1011 | * is | |
1012 | * "greater" than that held by S, ... */ | |
1013 | ||
562d7ef7 | 1014 | if (comp == LSP_NEWER) { |
d62a17ae | 1015 | /* 7.3.16.1 */ |
af8ac8f9 | 1016 | lsp_inc_seqno(lsp, hdr.seqno); |
562d7ef7 | 1017 | if (isis->debugs & DEBUG_UPDATE_PACKETS) { |
d62a17ae | 1018 | zlog_debug( |
af8ac8f9 | 1019 | "ISIS-Upd (%s): (2) re-originating LSP %s new seq 0x%08" PRIx32, |
d62a17ae | 1020 | circuit->area->area_tag, |
af8ac8f9 CF |
1021 | rawlspid_print(hdr.lsp_id), |
1022 | lsp->hdr.seqno); | |
562d7ef7 CF |
1023 | } |
1024 | lsp_flood(lsp, NULL); | |
1025 | } else if (comp == LSP_EQUAL) { | |
1026 | isis_tx_queue_del(circuit->tx_queue, lsp); | |
1027 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
1028 | ISIS_SET_FLAG(lsp->SSNflags, circuit); | |
1029 | } else { | |
1030 | isis_tx_queue_add(circuit->tx_queue, lsp, | |
1031 | TX_LSP_NORMAL); | |
1032 | ISIS_CLEAR_FLAG(lsp->SSNflags, circuit); | |
d62a17ae | 1033 | } |
d62a17ae | 1034 | } else { |
1035 | /* 7.3.15.1 e) - This lsp originated on another system */ | |
1036 | ||
1037 | /* 7.3.15.1 e) 1) LSP newer than the one in db or no LSP in db | |
1038 | */ | |
1039 | if ((!lsp || comp == LSP_NEWER)) { | |
1040 | /* | |
1041 | * If this lsp is a frag, need to see if we have zero | |
1042 | * lsp present | |
1043 | */ | |
af8ac8f9 CF |
1044 | struct isis_lsp *lsp0 = NULL; |
1045 | if (LSP_FRAGMENT(hdr.lsp_id) != 0) { | |
1046 | uint8_t lspid[ISIS_SYS_ID_LEN + 2]; | |
1047 | memcpy(lspid, hdr.lsp_id, ISIS_SYS_ID_LEN + 1); | |
d62a17ae | 1048 | LSP_FRAGMENT(lspid) = 0; |
1049 | lsp0 = lsp_search( | |
1050 | lspid, circuit->area->lspdb[level - 1]); | |
1051 | if (!lsp0) { | |
1052 | zlog_debug( | |
1053 | "Got lsp frag, while zero lsp not in database"); | |
df0ba689 | 1054 | goto out; |
d62a17ae | 1055 | } |
1056 | } | |
1057 | /* i */ | |
1058 | if (!lsp) { | |
af8ac8f9 CF |
1059 | lsp = lsp_new_from_recv( |
1060 | &hdr, tlvs, circuit->rcv_stream, lsp0, | |
d62a17ae | 1061 | circuit->area, level); |
af8ac8f9 | 1062 | tlvs = NULL; |
d62a17ae | 1063 | lsp_insert(lsp, |
1064 | circuit->area->lspdb[level - 1]); | |
1065 | } else /* exists, so we overwrite */ | |
1066 | { | |
af8ac8f9 | 1067 | lsp_update(lsp, &hdr, tlvs, circuit->rcv_stream, |
164066e4 | 1068 | circuit->area, level, false); |
af8ac8f9 | 1069 | tlvs = NULL; |
d62a17ae | 1070 | } |
1cbd5b37 CF |
1071 | if (!circuit_scoped) |
1072 | lsp_flood(lsp, circuit); | |
d62a17ae | 1073 | |
1074 | /* iv */ | |
1075 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
1076 | ISIS_SET_FLAG(lsp->SSNflags, circuit); | |
1077 | /* FIXME: v) */ | |
1078 | } | |
1079 | /* 7.3.15.1 e) 2) LSP equal to the one in db */ | |
1080 | else if (comp == LSP_EQUAL) { | |
9b39405f | 1081 | isis_tx_queue_del(circuit->tx_queue, lsp); |
af8ac8f9 | 1082 | lsp_update(lsp, &hdr, tlvs, circuit->rcv_stream, |
164066e4 | 1083 | circuit->area, level, false); |
af8ac8f9 | 1084 | tlvs = NULL; |
d62a17ae | 1085 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) |
1086 | ISIS_SET_FLAG(lsp->SSNflags, circuit); | |
1087 | } | |
1088 | /* 7.3.15.1 e) 3) LSP older than the one in db */ | |
1089 | else { | |
9b39405f CF |
1090 | isis_tx_queue_add(circuit->tx_queue, lsp, |
1091 | TX_LSP_NORMAL); | |
d62a17ae | 1092 | ISIS_CLEAR_FLAG(lsp->SSNflags, circuit); |
1093 | } | |
f390d2c7 | 1094 | } |
af8ac8f9 CF |
1095 | |
1096 | retval = ISIS_OK; | |
1097 | ||
1098 | out: | |
df0ba689 CF |
1099 | if (circuit_scoped) { |
1100 | fabricd_trigger_csnp(circuit->area); | |
1101 | } | |
1102 | ||
af8ac8f9 | 1103 | isis_free_tlvs(tlvs); |
d62a17ae | 1104 | return retval; |
eb5d44eb | 1105 | } |
1106 | ||
1107 | /* | |
1108 | * Process Sequence Numbers | |
1109 | * ISO - 10589 | |
1110 | * Section 7.3.15.2 - Action on receipt of a sequence numbers PDU | |
1111 | */ | |
1112 | ||
17c9dcd5 | 1113 | static int process_snp(uint8_t pdu_type, struct isis_circuit *circuit, |
d7c0a89a | 1114 | const uint8_t *ssnpa) |
eb5d44eb | 1115 | { |
17c9dcd5 CF |
1116 | bool is_csnp = (pdu_type == L1_COMPLETE_SEQ_NUM |
1117 | || pdu_type == L2_COMPLETE_SEQ_NUM); | |
1118 | char typechar = is_csnp ? 'C' : 'P'; | |
1119 | int level = (pdu_type == L1_COMPLETE_SEQ_NUM | |
1120 | || pdu_type == L1_PARTIAL_SEQ_NUM) | |
1121 | ? ISIS_LEVEL1 | |
1122 | : ISIS_LEVEL2; | |
1123 | ||
1124 | uint16_t pdu_len = stream_getw(circuit->rcv_stream); | |
1125 | uint8_t rem_sys_id[ISIS_SYS_ID_LEN]; | |
1126 | stream_get(rem_sys_id, circuit->rcv_stream, ISIS_SYS_ID_LEN); | |
1127 | stream_forward_getp(circuit->rcv_stream, 1); /* Circuit ID - unused */ | |
1128 | ||
48944eb6 A |
1129 | uint8_t start_lsp_id[ISIS_SYS_ID_LEN + 2] = {0}; |
1130 | uint8_t stop_lsp_id[ISIS_SYS_ID_LEN + 2] = {0}; | |
17c9dcd5 CF |
1131 | |
1132 | if (is_csnp) { | |
1133 | stream_get(start_lsp_id, circuit->rcv_stream, | |
1134 | ISIS_SYS_ID_LEN + 2); | |
1135 | stream_get(stop_lsp_id, circuit->rcv_stream, | |
1136 | ISIS_SYS_ID_LEN + 2); | |
1137 | } | |
1138 | ||
1139 | if (pdu_len_validate(pdu_len, circuit)) { | |
1140 | zlog_warn("Received a CSNP with bogus length %d", pdu_len); | |
1141 | return ISIS_WARNING; | |
f390d2c7 | 1142 | } |
eb5d44eb | 1143 | |
17c9dcd5 CF |
1144 | if (isis->debugs & DEBUG_SNP_PACKETS) { |
1145 | zlog_debug( | |
1146 | "ISIS-Snp (%s): Rcvd L%d %cSNP on %s, cirType %s, cirID %u", | |
1147 | circuit->area->area_tag, level, typechar, | |
1148 | circuit->interface->name, | |
1149 | circuit_t2string(circuit->is_type), | |
1150 | circuit->circuit_id); | |
1151 | if (isis->debugs & DEBUG_PACKET_DUMP) | |
1152 | zlog_dump_data(STREAM_DATA(circuit->rcv_stream), | |
1153 | stream_get_endp(circuit->rcv_stream)); | |
1154 | } | |
eb5d44eb | 1155 | |
d62a17ae | 1156 | /* 7.3.15.2 a) 1 - external domain circuit will discard snp pdu */ |
1157 | if (circuit->ext_domain) { | |
f390d2c7 | 1158 | |
d62a17ae | 1159 | zlog_debug( |
1160 | "ISIS-Snp (%s): Rcvd L%d %cSNP on %s, " | |
1161 | "skipping: circuit externalDomain = true", | |
1162 | circuit->area->area_tag, level, typechar, | |
1163 | circuit->interface->name); | |
f390d2c7 | 1164 | |
d62a17ae | 1165 | return ISIS_OK; |
1166 | } | |
eb5d44eb | 1167 | |
d62a17ae | 1168 | /* 7.3.15.2 a) 2,3 - manualL2OnlyMode not implemented */ |
af8ac8f9 | 1169 | if (!(circuit->is_type & level)) { |
d62a17ae | 1170 | zlog_debug( |
1171 | "ISIS-Snp (%s): Rcvd L%d %cSNP on %s, " | |
1172 | "skipping: circuit type %s does not match level %d", | |
1173 | circuit->area->area_tag, level, typechar, | |
1174 | circuit->interface->name, | |
1175 | circuit_t2string(circuit->is_type), level); | |
eb5d44eb | 1176 | |
d62a17ae | 1177 | return ISIS_OK; |
f390d2c7 | 1178 | } |
eb5d44eb | 1179 | |
d62a17ae | 1180 | /* 7.3.15.2 a) 4 - not applicable for CSNP only PSNPs on broadcast */ |
17c9dcd5 CF |
1181 | if (!is_csnp && (circuit->circ_type == CIRCUIT_T_BROADCAST) |
1182 | && !circuit->u.bc.is_dr[level - 1]) { | |
d62a17ae | 1183 | zlog_debug( |
1184 | "ISIS-Snp (%s): Rcvd L%d %cSNP from %s on %s, " | |
1185 | "skipping: we are not the DIS", | |
1186 | circuit->area->area_tag, level, typechar, | |
1187 | snpa_print(ssnpa), circuit->interface->name); | |
1188 | ||
1189 | return ISIS_OK; | |
1190 | } | |
eb5d44eb | 1191 | |
d62a17ae | 1192 | /* 7.3.15.2 a) 5 - need to make sure IDLength matches - already checked |
1193 | */ | |
1194 | ||
1195 | /* 7.3.15.2 a) 6 - maximum area match, can be ommited since we only use | |
1196 | * 3 | |
1197 | * - already checked */ | |
1198 | ||
1199 | /* 7.3.15.2 a) 7 - Must check that we have an adjacency of the same | |
1200 | * level */ | |
1201 | /* for broadcast circuits, snpa should be compared */ | |
1202 | /* FIXME : Do we need to check SNPA? */ | |
1203 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) { | |
17c9dcd5 CF |
1204 | if (!isis_adj_lookup(rem_sys_id, |
1205 | circuit->u.bc.adjdb[level - 1])) | |
d62a17ae | 1206 | return ISIS_OK; /* Silently discard */ |
1207 | } else { | |
8e6fb83b | 1208 | if (!fabricd && !circuit->u.p2p.neighbor) { |
d62a17ae | 1209 | zlog_warn("no p2p neighbor on circuit %s", |
1210 | circuit->interface->name); | |
1211 | return ISIS_OK; /* Silently discard */ | |
1212 | } | |
1213 | } | |
eb5d44eb | 1214 | |
17c9dcd5 CF |
1215 | struct isis_tlvs *tlvs; |
1216 | int retval = ISIS_WARNING; | |
1217 | const char *error_log; | |
eb5d44eb | 1218 | |
17c9dcd5 CF |
1219 | if (isis_unpack_tlvs(STREAM_READABLE(circuit->rcv_stream), |
1220 | circuit->rcv_stream, &tlvs, &error_log)) { | |
1221 | zlog_warn("Something went wrong unpacking the SNP: %s", | |
1222 | error_log); | |
1223 | goto out; | |
f390d2c7 | 1224 | } |
eb5d44eb | 1225 | |
17c9dcd5 CF |
1226 | struct isis_passwd *passwd = (level == IS_LEVEL_1) |
1227 | ? &circuit->area->area_passwd | |
1228 | : &circuit->area->domain_passwd; | |
1229 | if (CHECK_FLAG(passwd->snp_auth, SNP_AUTH_RECV) | |
af8ac8f9 CF |
1230 | && !isis_tlvs_auth_is_valid(tlvs, passwd, circuit->rcv_stream, |
1231 | false)) { | |
17c9dcd5 CF |
1232 | isis_event_auth_failure(circuit->area->area_tag, |
1233 | "SNP authentication failure", | |
1234 | rem_sys_id); | |
1235 | goto out; | |
d62a17ae | 1236 | } |
eb5d44eb | 1237 | |
17c9dcd5 CF |
1238 | struct isis_lsp_entry *entry_head = |
1239 | (struct isis_lsp_entry *)tlvs->lsp_entries.head; | |
1240 | ||
d62a17ae | 1241 | /* debug isis snp-packets */ |
1242 | if (isis->debugs & DEBUG_SNP_PACKETS) { | |
1243 | zlog_debug("ISIS-Snp (%s): Rcvd L%d %cSNP from %s on %s", | |
1244 | circuit->area->area_tag, level, typechar, | |
1245 | snpa_print(ssnpa), circuit->interface->name); | |
17c9dcd5 CF |
1246 | for (struct isis_lsp_entry *entry = entry_head; entry; |
1247 | entry = entry->next) { | |
1248 | zlog_debug( | |
1249 | "ISIS-Snp (%s): %cSNP entry %s, seq 0x%08" PRIx32 | |
98c5bc15 | 1250 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 "s", |
17c9dcd5 CF |
1251 | circuit->area->area_tag, typechar, |
1252 | rawlspid_print(entry->id), entry->seqno, | |
1253 | entry->checksum, entry->rem_lifetime); | |
f390d2c7 | 1254 | } |
f390d2c7 | 1255 | } |
3f045a08 | 1256 | |
df0ba689 CF |
1257 | bool resync_needed = false; |
1258 | ||
d62a17ae | 1259 | /* 7.3.15.2 b) Actions on LSP_ENTRIES reported */ |
17c9dcd5 CF |
1260 | for (struct isis_lsp_entry *entry = entry_head; entry; |
1261 | entry = entry->next) { | |
1262 | struct isis_lsp *lsp = | |
1263 | lsp_search(entry->id, circuit->area->lspdb[level - 1]); | |
1264 | bool own_lsp = !memcmp(entry->id, isis->sysid, ISIS_SYS_ID_LEN); | |
1265 | if (lsp) { | |
1266 | /* 7.3.15.2 b) 1) is this LSP newer */ | |
1267 | int cmp = lsp_compare(circuit->area->area_tag, lsp, | |
1268 | entry->seqno, entry->checksum, | |
1269 | entry->rem_lifetime); | |
1270 | /* 7.3.15.2 b) 2) if it equals, clear SRM on p2p */ | |
1271 | if (cmp == LSP_EQUAL) { | |
1272 | /* if (circuit->circ_type != | |
1273 | * CIRCUIT_T_BROADCAST) */ | |
9b39405f | 1274 | isis_tx_queue_del(circuit->tx_queue, lsp); |
17c9dcd5 CF |
1275 | } |
1276 | /* 7.3.15.2 b) 3) if it is older, clear SSN and set SRM | |
1277 | */ | |
1278 | else if (cmp == LSP_OLDER) { | |
1279 | ISIS_CLEAR_FLAG(lsp->SSNflags, circuit); | |
9b39405f CF |
1280 | isis_tx_queue_add(circuit->tx_queue, lsp, |
1281 | TX_LSP_NORMAL); | |
17c9dcd5 CF |
1282 | } |
1283 | /* 7.3.15.2 b) 4) if it is newer, set SSN and clear SRM | |
1284 | on p2p */ | |
1285 | else { | |
1286 | if (own_lsp) { | |
af8ac8f9 | 1287 | lsp_inc_seqno(lsp, entry->seqno); |
9b39405f CF |
1288 | isis_tx_queue_add(circuit->tx_queue, lsp, |
1289 | TX_LSP_NORMAL); | |
17c9dcd5 CF |
1290 | } else { |
1291 | ISIS_SET_FLAG(lsp->SSNflags, circuit); | |
d62a17ae | 1292 | /* if (circuit->circ_type != |
1293 | * CIRCUIT_T_BROADCAST) */ | |
9b39405f | 1294 | isis_tx_queue_del(circuit->tx_queue, lsp); |
df0ba689 | 1295 | resync_needed = true; |
d62a17ae | 1296 | } |
17c9dcd5 CF |
1297 | } |
1298 | } else { | |
1299 | /* 7.3.15.2 b) 5) if it was not found, and all of those | |
1300 | * are not 0, | |
1301 | * insert it and set SSN on it */ | |
1302 | if (entry->rem_lifetime && entry->checksum | |
1303 | && entry->seqno && memcmp(entry->id, isis->sysid, | |
1304 | ISIS_SYS_ID_LEN)) { | |
8f5dbe18 CF |
1305 | struct isis_lsp *lsp0 = NULL; |
1306 | ||
1307 | if (LSP_FRAGMENT(entry->id)) { | |
1308 | uint8_t lspid[ISIS_SYS_ID_LEN + 2]; | |
1309 | ||
1310 | memcpy(lspid, entry->id, | |
1311 | ISIS_SYS_ID_LEN + 1); | |
1312 | LSP_FRAGMENT(lspid) = 0; | |
1313 | lsp0 = lsp_search( | |
98c5bc15 CF |
1314 | lspid, |
1315 | circuit->area->lspdb[level - 1]); | |
8f5dbe18 | 1316 | if (!lsp0) { |
98c5bc15 | 1317 | zlog_debug("Got lsp frag in snp, while zero not in database"); |
8f5dbe18 CF |
1318 | continue; |
1319 | } | |
1320 | } | |
f7813c7c | 1321 | lsp = lsp_new(circuit->area, entry->id, |
17c9dcd5 | 1322 | entry->rem_lifetime, 0, 0, |
8f5dbe18 | 1323 | entry->checksum, lsp0, level); |
17c9dcd5 CF |
1324 | lsp_insert(lsp, |
1325 | circuit->area->lspdb[level - 1]); | |
9b39405f CF |
1326 | |
1327 | lsp_set_all_srmflags(lsp, false); | |
17c9dcd5 | 1328 | ISIS_SET_FLAG(lsp->SSNflags, circuit); |
df0ba689 | 1329 | resync_needed = true; |
d62a17ae | 1330 | } |
1331 | } | |
1332 | } | |
eb5d44eb | 1333 | |
d62a17ae | 1334 | /* 7.3.15.2 c) on CSNP set SRM for all in range which were not reported |
1335 | */ | |
17c9dcd5 | 1336 | if (is_csnp) { |
d62a17ae | 1337 | /* |
1338 | * Build a list from our own LSP db bounded with | |
1339 | * start_lsp_id and stop_lsp_id | |
1340 | */ | |
17c9dcd5 CF |
1341 | struct list *lsp_list = list_new(); |
1342 | lsp_build_list_nonzero_ht(start_lsp_id, stop_lsp_id, lsp_list, | |
d62a17ae | 1343 | circuit->area->lspdb[level - 1]); |
1344 | ||
1345 | /* Fixme: Find a better solution */ | |
17c9dcd5 CF |
1346 | struct listnode *node, *nnode; |
1347 | struct isis_lsp *lsp; | |
1348 | for (struct isis_lsp_entry *entry = entry_head; entry; | |
1349 | entry = entry->next) { | |
1350 | for (ALL_LIST_ELEMENTS(lsp_list, node, nnode, lsp)) { | |
af8ac8f9 | 1351 | if (lsp_id_cmp(lsp->hdr.lsp_id, entry->id) |
17c9dcd5 CF |
1352 | == 0) { |
1353 | list_delete_node(lsp_list, node); | |
1354 | break; | |
d62a17ae | 1355 | } |
1356 | } | |
1357 | } | |
17c9dcd5 | 1358 | |
d62a17ae | 1359 | /* on remaining LSPs we set SRM (neighbor knew not of) */ |
9b39405f CF |
1360 | for (ALL_LIST_ELEMENTS_RO(lsp_list, node, lsp)) { |
1361 | isis_tx_queue_add(circuit->tx_queue, lsp, TX_LSP_NORMAL); | |
df0ba689 | 1362 | resync_needed = true; |
9b39405f CF |
1363 | } |
1364 | ||
d62a17ae | 1365 | /* lets free it */ |
6a154c88 | 1366 | list_delete(&lsp_list); |
d62a17ae | 1367 | } |
1368 | ||
df0ba689 CF |
1369 | if (fabricd_initial_sync_is_complete(circuit->area) && resync_needed) |
1370 | zlog_warn("OpenFabric: Needed to resync LSPDB using CSNP!\n"); | |
1371 | ||
17c9dcd5 CF |
1372 | retval = ISIS_OK; |
1373 | out: | |
1374 | isis_free_tlvs(tlvs); | |
d62a17ae | 1375 | return retval; |
eb5d44eb | 1376 | } |
1377 | ||
88f9d911 CF |
1378 | static int pdu_size(uint8_t pdu_type, uint8_t *size) |
1379 | { | |
1380 | switch (pdu_type) { | |
1381 | case L1_LAN_HELLO: | |
1382 | case L2_LAN_HELLO: | |
1383 | *size = ISIS_LANHELLO_HDRLEN; | |
1384 | break; | |
1385 | case P2P_HELLO: | |
1386 | *size = ISIS_P2PHELLO_HDRLEN; | |
1387 | break; | |
1388 | case L1_LINK_STATE: | |
1389 | case L2_LINK_STATE: | |
1cbd5b37 | 1390 | case FS_LINK_STATE: |
88f9d911 CF |
1391 | *size = ISIS_LSP_HDR_LEN; |
1392 | break; | |
1393 | case L1_COMPLETE_SEQ_NUM: | |
1394 | case L2_COMPLETE_SEQ_NUM: | |
1395 | *size = ISIS_CSNP_HDRLEN; | |
1396 | break; | |
1397 | case L1_PARTIAL_SEQ_NUM: | |
1398 | case L2_PARTIAL_SEQ_NUM: | |
1399 | *size = ISIS_PSNP_HDRLEN; | |
1400 | break; | |
1401 | default: | |
1402 | return 1; | |
1403 | } | |
1404 | *size += ISIS_FIXED_HDR_LEN; | |
1405 | return 0; | |
1406 | } | |
1407 | ||
eb5d44eb | 1408 | /* |
1409 | * PDU Dispatcher | |
1410 | */ | |
1411 | ||
d7c0a89a | 1412 | int isis_handle_pdu(struct isis_circuit *circuit, uint8_t *ssnpa) |
eb5d44eb | 1413 | { |
d62a17ae | 1414 | int retval = ISIS_OK; |
eb5d44eb | 1415 | |
88f9d911 CF |
1416 | /* Verify that at least the 8 bytes fixed header have been received */ |
1417 | if (stream_get_endp(circuit->rcv_stream) < ISIS_FIXED_HDR_LEN) { | |
1a7ecb96 | 1418 | flog_err(EC_ISIS_PACKET, "PDU is too short to be IS-IS."); |
88f9d911 CF |
1419 | return ISIS_ERROR; |
1420 | } | |
eb5d44eb | 1421 | |
88f9d911 CF |
1422 | uint8_t idrp = stream_getc(circuit->rcv_stream); |
1423 | uint8_t length = stream_getc(circuit->rcv_stream); | |
1424 | uint8_t version1 = stream_getc(circuit->rcv_stream); | |
1425 | uint8_t id_len = stream_getc(circuit->rcv_stream); | |
1426 | uint8_t pdu_type = stream_getc(circuit->rcv_stream) | |
1427 | & 0x1f; /* bits 6-8 are reserved */ | |
1428 | uint8_t version2 = stream_getc(circuit->rcv_stream); | |
1429 | stream_forward_getp(circuit->rcv_stream, 1); /* reserved */ | |
1430 | uint8_t max_area_addrs = stream_getc(circuit->rcv_stream); | |
1431 | ||
1432 | if (idrp == ISO9542_ESIS) { | |
450971aa | 1433 | flog_err(EC_LIB_DEVELOPMENT, |
1c50c1c0 | 1434 | "No support for ES-IS packet IDRP=%" PRIx8, idrp); |
d62a17ae | 1435 | return ISIS_ERROR; |
1436 | } | |
eb5d44eb | 1437 | |
88f9d911 | 1438 | if (idrp != ISO10589_ISIS) { |
1a7ecb96 | 1439 | flog_err(EC_ISIS_PACKET, "Not an IS-IS packet IDRP=%" PRIx8, |
1c50c1c0 | 1440 | idrp); |
d62a17ae | 1441 | return ISIS_ERROR; |
1442 | } | |
3f045a08 | 1443 | |
88f9d911 CF |
1444 | if (version1 != 1) { |
1445 | zlog_warn("Unsupported ISIS version %" PRIu8, version1); | |
1446 | return ISIS_WARNING; | |
1447 | } | |
eb5d44eb | 1448 | |
88f9d911 | 1449 | if (id_len != 0 && id_len != ISIS_SYS_ID_LEN) { |
af4c2728 | 1450 | flog_err( |
1a7ecb96 | 1451 | EC_ISIS_PACKET, |
88f9d911 CF |
1452 | "IDFieldLengthMismatch: ID Length field in a received PDU %" PRIu8 |
1453 | ", while the parameter for this IS is %u", | |
1454 | id_len, ISIS_SYS_ID_LEN); | |
d62a17ae | 1455 | return ISIS_ERROR; |
1456 | } | |
eb5d44eb | 1457 | |
88f9d911 CF |
1458 | uint8_t expected_length; |
1459 | if (pdu_size(pdu_type, &expected_length)) { | |
1460 | zlog_warn("Unsupported ISIS PDU %" PRIu8, pdu_type); | |
d62a17ae | 1461 | return ISIS_WARNING; |
1462 | } | |
88f9d911 CF |
1463 | |
1464 | if (length != expected_length) { | |
1a7ecb96 | 1465 | flog_err(EC_ISIS_PACKET, |
1c50c1c0 QY |
1466 | "Exepected fixed header length = %" PRIu8 |
1467 | " but got %" PRIu8, | |
1468 | expected_length, length); | |
88f9d911 CF |
1469 | return ISIS_ERROR; |
1470 | } | |
1471 | ||
1472 | if (stream_get_endp(circuit->rcv_stream) < length) { | |
af4c2728 | 1473 | flog_err( |
1a7ecb96 | 1474 | EC_ISIS_PACKET, |
88f9d911 | 1475 | "PDU is too short to contain fixed header of given PDU type."); |
d62a17ae | 1476 | return ISIS_ERROR; |
1477 | } | |
eb5d44eb | 1478 | |
88f9d911 CF |
1479 | if (version2 != 1) { |
1480 | zlog_warn("Unsupported ISIS PDU version %" PRIu8, version2); | |
d62a17ae | 1481 | return ISIS_WARNING; |
1482 | } | |
3f045a08 | 1483 | |
d62a17ae | 1484 | if (circuit->is_passive) { |
1485 | zlog_warn("Received ISIS PDU on passive circuit %s", | |
1486 | circuit->interface->name); | |
1487 | return ISIS_WARNING; | |
1488 | } | |
3f045a08 | 1489 | |
d62a17ae | 1490 | /* either 3 or 0 */ |
1cbd5b37 CF |
1491 | if (pdu_type != FS_LINK_STATE /* FS PDU doesn't contain max area addr field */ |
1492 | && max_area_addrs != 0 | |
1493 | && max_area_addrs != isis->max_area_addrs) { | |
af4c2728 | 1494 | flog_err( |
1a7ecb96 | 1495 | EC_ISIS_PACKET, |
88f9d911 CF |
1496 | "maximumAreaAddressesMismatch: maximumAreaAdresses in a received PDU %" PRIu8 |
1497 | " while the parameter for this IS is %u", | |
1498 | max_area_addrs, isis->max_area_addrs); | |
d62a17ae | 1499 | return ISIS_ERROR; |
1500 | } | |
eb5d44eb | 1501 | |
88f9d911 | 1502 | switch (pdu_type) { |
d62a17ae | 1503 | case L1_LAN_HELLO: |
d62a17ae | 1504 | case L2_LAN_HELLO: |
d62a17ae | 1505 | case P2P_HELLO: |
a2d41bb0 CF |
1506 | if (fabricd && pdu_type != P2P_HELLO) |
1507 | return ISIS_ERROR; | |
0c1bd758 | 1508 | retval = process_hello(pdu_type, circuit, ssnpa); |
d62a17ae | 1509 | break; |
1510 | case L1_LINK_STATE: | |
d62a17ae | 1511 | case L2_LINK_STATE: |
1cbd5b37 | 1512 | case FS_LINK_STATE: |
a2d41bb0 CF |
1513 | if (fabricd |
1514 | && pdu_type != L2_LINK_STATE | |
1515 | && pdu_type != FS_LINK_STATE) | |
1516 | return ISIS_ERROR; | |
9b39405f | 1517 | retval = process_lsp(pdu_type, circuit, ssnpa, max_area_addrs); |
d62a17ae | 1518 | break; |
1519 | case L1_COMPLETE_SEQ_NUM: | |
d62a17ae | 1520 | case L2_COMPLETE_SEQ_NUM: |
d62a17ae | 1521 | case L1_PARTIAL_SEQ_NUM: |
d62a17ae | 1522 | case L2_PARTIAL_SEQ_NUM: |
17c9dcd5 | 1523 | retval = process_snp(pdu_type, circuit, ssnpa); |
d62a17ae | 1524 | break; |
1525 | default: | |
1526 | return ISIS_ERROR; | |
1527 | } | |
eb5d44eb | 1528 | |
d62a17ae | 1529 | return retval; |
eb5d44eb | 1530 | } |
1531 | ||
d62a17ae | 1532 | int isis_receive(struct thread *thread) |
eb5d44eb | 1533 | { |
d62a17ae | 1534 | struct isis_circuit *circuit; |
d7c0a89a | 1535 | uint8_t ssnpa[ETH_ALEN]; |
d62a17ae | 1536 | int retval; |
eb5d44eb | 1537 | |
d62a17ae | 1538 | /* |
1539 | * Get the circuit | |
1540 | */ | |
1541 | circuit = THREAD_ARG(thread); | |
1542 | assert(circuit); | |
eb5d44eb | 1543 | |
d62a17ae | 1544 | circuit->t_read = NULL; |
eb5d44eb | 1545 | |
d62a17ae | 1546 | isis_circuit_stream(circuit, &circuit->rcv_stream); |
eb5d44eb | 1547 | |
d62a17ae | 1548 | retval = circuit->rx(circuit, ssnpa); |
eb5d44eb | 1549 | |
b9347997 | 1550 | #if ISIS_METHOD != ISIS_METHOD_BPF |
d62a17ae | 1551 | if (retval == ISIS_OK) |
1552 | retval = isis_handle_pdu(circuit, ssnpa); | |
b9347997 | 1553 | #endif //ISIS_METHOD != ISIS_METHOD_BPF |
eb5d44eb | 1554 | |
d62a17ae | 1555 | /* |
1556 | * prepare for next packet. | |
1557 | */ | |
1558 | if (!circuit->is_passive) | |
1559 | isis_circuit_prepare(circuit); | |
eb5d44eb | 1560 | |
d62a17ae | 1561 | return retval; |
eb5d44eb | 1562 | } |
1563 | ||
eb5d44eb | 1564 | /* |
d62a17ae | 1565 | * SEND SIDE |
eb5d44eb | 1566 | */ |
88f9d911 | 1567 | void fill_fixed_hdr(uint8_t pdu_type, struct stream *stream) |
eb5d44eb | 1568 | { |
88f9d911 CF |
1569 | uint8_t length; |
1570 | ||
1571 | if (pdu_size(pdu_type, &length)) | |
1572 | assert(!"Unknown PDU Type"); | |
1573 | ||
1574 | stream_putc(stream, ISO10589_ISIS); /* IDRP */ | |
1575 | stream_putc(stream, length); /* Length of fixed header */ | |
1576 | stream_putc(stream, 1); /* Version/Protocol ID Extension 1 */ | |
1577 | stream_putc(stream, 0); /* ID Length, 0 => 6 */ | |
1578 | stream_putc(stream, pdu_type); | |
1579 | stream_putc(stream, 1); /* Subversion */ | |
1580 | stream_putc(stream, 0); /* Reserved */ | |
1581 | stream_putc(stream, 0); /* Max Area Addresses 0 => 3 */ | |
eb5d44eb | 1582 | } |
1583 | ||
0c1bd758 CF |
1584 | static void put_hello_hdr(struct isis_circuit *circuit, int level, |
1585 | size_t *len_pointer) | |
eb5d44eb | 1586 | { |
88f9d911 CF |
1587 | uint8_t pdu_type; |
1588 | ||
d62a17ae | 1589 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) |
88f9d911 | 1590 | pdu_type = (level == IS_LEVEL_1) ? L1_LAN_HELLO : L2_LAN_HELLO; |
d62a17ae | 1591 | else |
88f9d911 CF |
1592 | pdu_type = P2P_HELLO; |
1593 | ||
0c1bd758 | 1594 | isis_circuit_stream(circuit, &circuit->snd_stream); |
88f9d911 | 1595 | fill_fixed_hdr(pdu_type, circuit->snd_stream); |
d62a17ae | 1596 | |
0c1bd758 CF |
1597 | stream_putc(circuit->snd_stream, circuit->is_type); |
1598 | stream_put(circuit->snd_stream, circuit->area->isis->sysid, | |
1599 | ISIS_SYS_ID_LEN); | |
eb5d44eb | 1600 | |
0c1bd758 CF |
1601 | uint32_t holdtime = circuit->hello_multiplier[level - 1] |
1602 | * circuit->hello_interval[level - 1]; | |
d62a17ae | 1603 | |
0c1bd758 CF |
1604 | if (holdtime > 0xffff) |
1605 | holdtime = 0xffff; | |
d62a17ae | 1606 | |
0c1bd758 CF |
1607 | stream_putw(circuit->snd_stream, holdtime); |
1608 | *len_pointer = stream_get_endp(circuit->snd_stream); | |
1609 | stream_putw(circuit->snd_stream, 0); /* length is filled in later */ | |
d62a17ae | 1610 | |
0c1bd758 | 1611 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) { |
d7c0a89a QY |
1612 | uint8_t *desig_is = (level == IS_LEVEL_1) |
1613 | ? circuit->u.bc.l1_desig_is | |
1614 | : circuit->u.bc.l2_desig_is; | |
0c1bd758 CF |
1615 | stream_putc(circuit->snd_stream, circuit->priority[level - 1]); |
1616 | stream_put(circuit->snd_stream, desig_is, ISIS_SYS_ID_LEN + 1); | |
1617 | } else { | |
1618 | stream_putc(circuit->snd_stream, circuit->circuit_id); | |
d62a17ae | 1619 | } |
0c1bd758 | 1620 | } |
eb5d44eb | 1621 | |
0c1bd758 CF |
1622 | int send_hello(struct isis_circuit *circuit, int level) |
1623 | { | |
1624 | size_t len_pointer; | |
1625 | int retval; | |
1626 | ||
1627 | if (circuit->is_passive) | |
1628 | return ISIS_OK; | |
1629 | ||
1630 | if (circuit->interface->mtu == 0) { | |
1631 | zlog_warn("circuit has zero MTU"); | |
d62a17ae | 1632 | return ISIS_WARNING; |
0c1bd758 CF |
1633 | } |
1634 | ||
1635 | put_hello_hdr(circuit, level, &len_pointer); | |
1636 | ||
1637 | struct isis_tlvs *tlvs = isis_alloc_tlvs(); | |
1638 | ||
1639 | isis_tlvs_add_auth(tlvs, &circuit->passwd); | |
1640 | ||
a3acf37d DS |
1641 | if (!listcount(circuit->area->area_addrs)) { |
1642 | isis_free_tlvs(tlvs); | |
d62a17ae | 1643 | return ISIS_WARNING; |
a3acf37d DS |
1644 | } |
1645 | ||
0c1bd758 | 1646 | isis_tlvs_add_area_addresses(tlvs, circuit->area->area_addrs); |
d62a17ae | 1647 | |
42fe2621 | 1648 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) { |
0c1bd758 CF |
1649 | isis_tlvs_add_lan_neighbors( |
1650 | tlvs, circuit->u.bc.lan_neighs[level - 1]); | |
58e5d748 CF |
1651 | } else if (circuit->circ_type == CIRCUIT_T_P2P |
1652 | && !circuit->disable_threeway_adj) { | |
42fe2621 CF |
1653 | uint32_t ext_circuit_id = circuit->idx; |
1654 | if (circuit->u.p2p.neighbor) { | |
8e6fb83b CF |
1655 | uint8_t threeway_state; |
1656 | ||
1657 | if (fabricd_initial_sync_is_in_progress(circuit->area) | |
1658 | && fabricd_initial_sync_circuit(circuit->area) != circuit) | |
1659 | threeway_state = ISIS_THREEWAY_DOWN; | |
1660 | else | |
1661 | threeway_state = circuit->u.p2p.neighbor->threeway_state; | |
42fe2621 | 1662 | isis_tlvs_add_threeway_adj(tlvs, |
8e6fb83b | 1663 | threeway_state, |
42fe2621 CF |
1664 | ext_circuit_id, |
1665 | circuit->u.p2p.neighbor->sysid, | |
1666 | circuit->u.p2p.neighbor->ext_circuit_id); | |
1667 | } else { | |
1668 | isis_tlvs_add_threeway_adj(tlvs, | |
1669 | ISIS_THREEWAY_DOWN, | |
1670 | ext_circuit_id, | |
1671 | NULL, 0); | |
1672 | } | |
1673 | } | |
0c1bd758 CF |
1674 | |
1675 | isis_tlvs_set_protocols_supported(tlvs, &circuit->nlpids); | |
d62a17ae | 1676 | |
1677 | /* | |
1678 | * MT Supported TLV | |
1679 | * | |
1680 | * TLV gets included if no topology is enabled on the interface, | |
1681 | * if one topology other than #0 is enabled, or if multiple topologies | |
1682 | * are enabled. | |
1683 | */ | |
1684 | struct isis_circuit_mt_setting **mt_settings; | |
1685 | unsigned int mt_count; | |
1686 | ||
1687 | mt_settings = circuit_mt_settings(circuit, &mt_count); | |
0c1bd758 CF |
1688 | if (mt_count == 0 && area_is_mt(circuit->area)) { |
1689 | tlvs->mt_router_info_empty = true; | |
1690 | } else if ((mt_count == 1 | |
1691 | && mt_settings[0]->mtid != ISIS_MT_IPV4_UNICAST) | |
1692 | || (mt_count > 1)) { | |
1693 | for (unsigned int i = 0; i < mt_count; i++) | |
1694 | isis_tlvs_add_mt_router_info(tlvs, mt_settings[i]->mtid, | |
1695 | false, false); | |
d62a17ae | 1696 | } |
eb5d44eb | 1697 | |
41415888 CF |
1698 | if (circuit->ip_router) { |
1699 | struct list *circuit_ip_addrs = fabricd_ip_addrs(circuit); | |
1700 | ||
1701 | if (circuit_ip_addrs) | |
1702 | isis_tlvs_add_ipv4_addresses(tlvs, circuit_ip_addrs); | |
1703 | } | |
d62a17ae | 1704 | |
0c1bd758 CF |
1705 | if (circuit->ipv6_router && circuit->ipv6_link) |
1706 | isis_tlvs_add_ipv6_addresses(tlvs, circuit->ipv6_link); | |
d62a17ae | 1707 | |
0c1bd758 | 1708 | if (isis_pack_tlvs(tlvs, circuit->snd_stream, len_pointer, |
af8ac8f9 | 1709 | circuit->pad_hellos, false)) { |
0c1bd758 CF |
1710 | isis_free_tlvs(tlvs); |
1711 | return ISIS_WARNING; /* XXX: Maybe Log TLV structure? */ | |
f390d2c7 | 1712 | } |
d62a17ae | 1713 | |
1714 | if (isis->debugs & DEBUG_ADJ_PACKETS) { | |
1715 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) { | |
1716 | zlog_debug( | |
1717 | "ISIS-Adj (%s): Sending L%d LAN IIH on %s, length %zd", | |
1718 | circuit->area->area_tag, level, | |
0c1bd758 CF |
1719 | circuit->interface->name, |
1720 | stream_get_endp(circuit->snd_stream)); | |
d62a17ae | 1721 | } else { |
1722 | zlog_debug( | |
1723 | "ISIS-Adj (%s): Sending P2P IIH on %s, length %zd", | |
1724 | circuit->area->area_tag, | |
0c1bd758 CF |
1725 | circuit->interface->name, |
1726 | stream_get_endp(circuit->snd_stream)); | |
d62a17ae | 1727 | } |
1728 | if (isis->debugs & DEBUG_PACKET_DUMP) | |
1729 | zlog_dump_data(STREAM_DATA(circuit->snd_stream), | |
1730 | stream_get_endp(circuit->snd_stream)); | |
f390d2c7 | 1731 | } |
eb5d44eb | 1732 | |
0c1bd758 CF |
1733 | isis_free_tlvs(tlvs); |
1734 | ||
d62a17ae | 1735 | retval = circuit->tx(circuit, level); |
1736 | if (retval != ISIS_OK) | |
1a7ecb96 | 1737 | flog_err(EC_ISIS_PACKET, |
1c50c1c0 QY |
1738 | "ISIS-Adj (%s): Send L%d IIH on %s failed", |
1739 | circuit->area->area_tag, level, | |
1740 | circuit->interface->name); | |
eb5d44eb | 1741 | |
d62a17ae | 1742 | return retval; |
eb5d44eb | 1743 | } |
1744 | ||
d62a17ae | 1745 | int send_lan_l1_hello(struct thread *thread) |
eb5d44eb | 1746 | { |
d62a17ae | 1747 | struct isis_circuit *circuit; |
1748 | int retval; | |
1749 | ||
1750 | circuit = THREAD_ARG(thread); | |
1751 | assert(circuit); | |
1752 | circuit->u.bc.t_send_lan_hello[0] = NULL; | |
1753 | ||
1754 | if (!(circuit->area->is_type & IS_LEVEL_1)) { | |
1755 | zlog_warn( | |
1756 | "ISIS-Hello (%s): Trying to send L1 IIH in L2-only area", | |
1757 | circuit->area->area_tag); | |
1758 | return 1; | |
1759 | } | |
ddfdbd32 | 1760 | |
d62a17ae | 1761 | if (circuit->u.bc.run_dr_elect[0]) |
1762 | isis_dr_elect(circuit, 1); | |
eb5d44eb | 1763 | |
d62a17ae | 1764 | retval = send_hello(circuit, 1); |
eb5d44eb | 1765 | |
d62a17ae | 1766 | /* set next timer thread */ |
1767 | thread_add_timer(master, send_lan_l1_hello, circuit, | |
1768 | isis_jitter(circuit->hello_interval[0], IIH_JITTER), | |
1769 | &circuit->u.bc.t_send_lan_hello[0]); | |
eb5d44eb | 1770 | |
d62a17ae | 1771 | return retval; |
eb5d44eb | 1772 | } |
1773 | ||
d62a17ae | 1774 | int send_lan_l2_hello(struct thread *thread) |
eb5d44eb | 1775 | { |
d62a17ae | 1776 | struct isis_circuit *circuit; |
1777 | int retval; | |
eb5d44eb | 1778 | |
d62a17ae | 1779 | circuit = THREAD_ARG(thread); |
1780 | assert(circuit); | |
1781 | circuit->u.bc.t_send_lan_hello[1] = NULL; | |
eb5d44eb | 1782 | |
d62a17ae | 1783 | if (!(circuit->area->is_type & IS_LEVEL_2)) { |
1784 | zlog_warn("ISIS-Hello (%s): Trying to send L2 IIH in L1 area", | |
1785 | circuit->area->area_tag); | |
1786 | return 1; | |
1787 | } | |
ddfdbd32 | 1788 | |
d62a17ae | 1789 | if (circuit->u.bc.run_dr_elect[1]) |
1790 | isis_dr_elect(circuit, 2); | |
eb5d44eb | 1791 | |
d62a17ae | 1792 | retval = send_hello(circuit, 2); |
eb5d44eb | 1793 | |
d62a17ae | 1794 | /* set next timer thread */ |
1795 | thread_add_timer(master, send_lan_l2_hello, circuit, | |
1796 | isis_jitter(circuit->hello_interval[1], IIH_JITTER), | |
1797 | &circuit->u.bc.t_send_lan_hello[1]); | |
eb5d44eb | 1798 | |
d62a17ae | 1799 | return retval; |
eb5d44eb | 1800 | } |
1801 | ||
d62a17ae | 1802 | int send_p2p_hello(struct thread *thread) |
eb5d44eb | 1803 | { |
d62a17ae | 1804 | struct isis_circuit *circuit; |
eb5d44eb | 1805 | |
d62a17ae | 1806 | circuit = THREAD_ARG(thread); |
1807 | assert(circuit); | |
1808 | circuit->u.p2p.t_send_p2p_hello = NULL; | |
eb5d44eb | 1809 | |
d62a17ae | 1810 | send_hello(circuit, 1); |
eb5d44eb | 1811 | |
d62a17ae | 1812 | /* set next timer thread */ |
1813 | thread_add_timer(master, send_p2p_hello, circuit, | |
1814 | isis_jitter(circuit->hello_interval[1], IIH_JITTER), | |
1815 | &circuit->u.p2p.t_send_p2p_hello); | |
eb5d44eb | 1816 | |
d62a17ae | 1817 | return ISIS_OK; |
eb5d44eb | 1818 | } |
1819 | ||
3f045a08 JB |
1820 | /* |
1821 | * Count the maximum number of lsps that can be accomodated by a given size. | |
1822 | */ | |
af8ac8f9 | 1823 | #define LSP_ENTRIES_LEN (10 + ISIS_SYS_ID_LEN) |
d62a17ae | 1824 | static uint16_t get_max_lsp_count(uint16_t size) |
3f045a08 | 1825 | { |
d62a17ae | 1826 | uint16_t tlv_count; |
1827 | uint16_t lsp_count; | |
1828 | uint16_t remaining_size; | |
3f045a08 | 1829 | |
d62a17ae | 1830 | /* First count the full size TLVs */ |
1831 | tlv_count = size / MAX_LSP_ENTRIES_TLV_SIZE; | |
1832 | lsp_count = tlv_count * (MAX_LSP_ENTRIES_TLV_SIZE / LSP_ENTRIES_LEN); | |
3f045a08 | 1833 | |
d62a17ae | 1834 | /* The last TLV, if any */ |
1835 | remaining_size = size % MAX_LSP_ENTRIES_TLV_SIZE; | |
1836 | if (remaining_size - 2 >= LSP_ENTRIES_LEN) | |
1837 | lsp_count += (remaining_size - 2) / LSP_ENTRIES_LEN; | |
3f045a08 | 1838 | |
d62a17ae | 1839 | return lsp_count; |
3f045a08 JB |
1840 | } |
1841 | ||
17c9dcd5 | 1842 | int send_csnp(struct isis_circuit *circuit, int level) |
3f045a08 | 1843 | { |
17c9dcd5 CF |
1844 | if (circuit->area->lspdb[level - 1] == NULL |
1845 | || dict_count(circuit->area->lspdb[level - 1]) == 0) | |
1846 | return ISIS_OK; | |
d62a17ae | 1847 | |
17c9dcd5 CF |
1848 | isis_circuit_stream(circuit, &circuit->snd_stream); |
1849 | fill_fixed_hdr((level == ISIS_LEVEL1) ? L1_COMPLETE_SEQ_NUM | |
1850 | : L2_COMPLETE_SEQ_NUM, | |
1851 | circuit->snd_stream); | |
3f045a08 | 1852 | |
17c9dcd5 CF |
1853 | size_t len_pointer = stream_get_endp(circuit->snd_stream); |
1854 | stream_putw(circuit->snd_stream, 0); | |
1855 | stream_put(circuit->snd_stream, isis->sysid, ISIS_SYS_ID_LEN); | |
1856 | /* with zero circuit id - ref 9.10, 9.11 */ | |
1857 | stream_putc(circuit->snd_stream, 0); | |
3f045a08 | 1858 | |
17c9dcd5 CF |
1859 | size_t start_pointer = stream_get_endp(circuit->snd_stream); |
1860 | stream_put(circuit->snd_stream, 0, ISIS_SYS_ID_LEN + 2); | |
1861 | size_t end_pointer = stream_get_endp(circuit->snd_stream); | |
1862 | stream_put(circuit->snd_stream, 0, ISIS_SYS_ID_LEN + 2); | |
d62a17ae | 1863 | |
17c9dcd5 CF |
1864 | struct isis_passwd *passwd = (level == ISIS_LEVEL1) |
1865 | ? &circuit->area->area_passwd | |
1866 | : &circuit->area->domain_passwd; | |
d62a17ae | 1867 | |
17c9dcd5 | 1868 | struct isis_tlvs *tlvs = isis_alloc_tlvs(); |
3f045a08 | 1869 | |
17c9dcd5 CF |
1870 | if (CHECK_FLAG(passwd->snp_auth, SNP_AUTH_SEND)) |
1871 | isis_tlvs_add_auth(tlvs, passwd); | |
eb5d44eb | 1872 | |
17c9dcd5 | 1873 | size_t tlv_start = stream_get_endp(circuit->snd_stream); |
af8ac8f9 CF |
1874 | if (isis_pack_tlvs(tlvs, circuit->snd_stream, len_pointer, false, |
1875 | false)) { | |
17c9dcd5 CF |
1876 | isis_free_tlvs(tlvs); |
1877 | return ISIS_WARNING; | |
1878 | } | |
1879 | isis_free_tlvs(tlvs); | |
d62a17ae | 1880 | |
17c9dcd5 CF |
1881 | uint16_t num_lsps = |
1882 | get_max_lsp_count(STREAM_WRITEABLE(circuit->snd_stream)); | |
d62a17ae | 1883 | |
17c9dcd5 | 1884 | uint8_t start[ISIS_SYS_ID_LEN + 2]; |
d62a17ae | 1885 | memset(start, 0x00, ISIS_SYS_ID_LEN + 2); |
17c9dcd5 | 1886 | uint8_t stop[ISIS_SYS_ID_LEN + 2]; |
d62a17ae | 1887 | memset(stop, 0xff, ISIS_SYS_ID_LEN + 2); |
1888 | ||
17c9dcd5 | 1889 | bool loop = true; |
d62a17ae | 1890 | while (loop) { |
17c9dcd5 CF |
1891 | tlvs = isis_alloc_tlvs(); |
1892 | if (CHECK_FLAG(passwd->snp_auth, SNP_AUTH_SEND)) | |
1893 | isis_tlvs_add_auth(tlvs, passwd); | |
1894 | ||
1895 | struct isis_lsp *last_lsp; | |
1896 | isis_tlvs_add_csnp_entries(tlvs, start, stop, num_lsps, | |
1897 | circuit->area->lspdb[level - 1], | |
1898 | &last_lsp); | |
d62a17ae | 1899 | /* |
1900 | * Update the stop lsp_id before encoding this CSNP. | |
1901 | */ | |
17c9dcd5 | 1902 | if (tlvs->lsp_entries.count < num_lsps) { |
d62a17ae | 1903 | memset(stop, 0xff, ISIS_SYS_ID_LEN + 2); |
1904 | } else { | |
af8ac8f9 | 1905 | memcpy(stop, last_lsp->hdr.lsp_id, sizeof(stop)); |
d62a17ae | 1906 | } |
3f045a08 | 1907 | |
17c9dcd5 CF |
1908 | memcpy(STREAM_DATA(circuit->snd_stream) + start_pointer, start, |
1909 | ISIS_SYS_ID_LEN + 2); | |
1910 | memcpy(STREAM_DATA(circuit->snd_stream) + end_pointer, stop, | |
1911 | ISIS_SYS_ID_LEN + 2); | |
1912 | stream_set_endp(circuit->snd_stream, tlv_start); | |
1913 | if (isis_pack_tlvs(tlvs, circuit->snd_stream, len_pointer, | |
af8ac8f9 | 1914 | false, false)) { |
17c9dcd5 CF |
1915 | isis_free_tlvs(tlvs); |
1916 | return ISIS_WARNING; | |
d62a17ae | 1917 | } |
eb5d44eb | 1918 | |
d62a17ae | 1919 | if (isis->debugs & DEBUG_SNP_PACKETS) { |
1920 | zlog_debug( | |
1921 | "ISIS-Snp (%s): Sending L%d CSNP on %s, length %zd", | |
1922 | circuit->area->area_tag, level, | |
1923 | circuit->interface->name, | |
1924 | stream_get_endp(circuit->snd_stream)); | |
17c9dcd5 CF |
1925 | log_multiline(LOG_DEBUG, " ", "%s", |
1926 | isis_format_tlvs(tlvs)); | |
d62a17ae | 1927 | if (isis->debugs & DEBUG_PACKET_DUMP) |
1928 | zlog_dump_data( | |
1929 | STREAM_DATA(circuit->snd_stream), | |
1930 | stream_get_endp(circuit->snd_stream)); | |
1931 | } | |
eb5d44eb | 1932 | |
17c9dcd5 | 1933 | int retval = circuit->tx(circuit, level); |
d62a17ae | 1934 | if (retval != ISIS_OK) { |
1a7ecb96 | 1935 | flog_err(EC_ISIS_PACKET, |
1c50c1c0 QY |
1936 | "ISIS-Snp (%s): Send L%d CSNP on %s failed", |
1937 | circuit->area->area_tag, level, | |
1938 | circuit->interface->name); | |
17c9dcd5 | 1939 | isis_free_tlvs(tlvs); |
d62a17ae | 1940 | return retval; |
1941 | } | |
3f045a08 | 1942 | |
d62a17ae | 1943 | /* |
1944 | * Start lsp_id of the next CSNP should be one plus the | |
1945 | * stop lsp_id in this current CSNP. | |
1946 | */ | |
1947 | memcpy(start, stop, ISIS_SYS_ID_LEN + 2); | |
1948 | loop = 0; | |
17c9dcd5 | 1949 | for (int i = ISIS_SYS_ID_LEN + 1; i >= 0; --i) { |
d7c0a89a | 1950 | if (start[i] < (uint8_t)0xff) { |
d62a17ae | 1951 | start[i] += 1; |
1952 | loop = 1; | |
1953 | break; | |
1954 | } | |
1955 | } | |
1956 | memset(stop, 0xff, ISIS_SYS_ID_LEN + 2); | |
17c9dcd5 | 1957 | isis_free_tlvs(tlvs); |
d62a17ae | 1958 | } |
3f045a08 | 1959 | |
17c9dcd5 | 1960 | return ISIS_OK; |
eb5d44eb | 1961 | } |
1962 | ||
d62a17ae | 1963 | int send_l1_csnp(struct thread *thread) |
eb5d44eb | 1964 | { |
d62a17ae | 1965 | struct isis_circuit *circuit; |
1966 | int retval = ISIS_OK; | |
eb5d44eb | 1967 | |
d62a17ae | 1968 | circuit = THREAD_ARG(thread); |
1969 | assert(circuit); | |
eb5d44eb | 1970 | |
d62a17ae | 1971 | circuit->t_send_csnp[0] = NULL; |
eb5d44eb | 1972 | |
8e6fb83b CF |
1973 | if ((circuit->circ_type == CIRCUIT_T_BROADCAST |
1974 | && circuit->u.bc.is_dr[0]) | |
1975 | || circuit->circ_type == CIRCUIT_T_P2P) { | |
d62a17ae | 1976 | send_csnp(circuit, 1); |
1977 | } | |
1978 | /* set next timer thread */ | |
1979 | thread_add_timer(master, send_l1_csnp, circuit, | |
1980 | isis_jitter(circuit->csnp_interval[0], CSNP_JITTER), | |
1981 | &circuit->t_send_csnp[0]); | |
eb5d44eb | 1982 | |
d62a17ae | 1983 | return retval; |
eb5d44eb | 1984 | } |
1985 | ||
d62a17ae | 1986 | int send_l2_csnp(struct thread *thread) |
eb5d44eb | 1987 | { |
d62a17ae | 1988 | struct isis_circuit *circuit; |
1989 | int retval = ISIS_OK; | |
eb5d44eb | 1990 | |
d62a17ae | 1991 | circuit = THREAD_ARG(thread); |
1992 | assert(circuit); | |
eb5d44eb | 1993 | |
d62a17ae | 1994 | circuit->t_send_csnp[1] = NULL; |
eb5d44eb | 1995 | |
8e6fb83b CF |
1996 | if ((circuit->circ_type == CIRCUIT_T_BROADCAST |
1997 | && circuit->u.bc.is_dr[1]) | |
1998 | || circuit->circ_type == CIRCUIT_T_P2P) { | |
d62a17ae | 1999 | send_csnp(circuit, 2); |
2000 | } | |
2001 | /* set next timer thread */ | |
2002 | thread_add_timer(master, send_l2_csnp, circuit, | |
2003 | isis_jitter(circuit->csnp_interval[1], CSNP_JITTER), | |
2004 | &circuit->t_send_csnp[1]); | |
d70f99e1 | 2005 | |
d62a17ae | 2006 | return retval; |
eb5d44eb | 2007 | } |
2008 | ||
eb5d44eb | 2009 | /* |
2010 | * 7.3.15.4 action on expiration of partial SNP interval | |
2011 | * level 1 | |
2012 | */ | |
d62a17ae | 2013 | static int send_psnp(int level, struct isis_circuit *circuit) |
eb5d44eb | 2014 | { |
d62a17ae | 2015 | if (circuit->circ_type == CIRCUIT_T_BROADCAST |
2016 | && circuit->u.bc.is_dr[level - 1]) | |
2017 | return ISIS_OK; | |
eb5d44eb | 2018 | |
d62a17ae | 2019 | if (circuit->area->lspdb[level - 1] == NULL |
2020 | || dict_count(circuit->area->lspdb[level - 1]) == 0) | |
2021 | return ISIS_OK; | |
f390d2c7 | 2022 | |
d62a17ae | 2023 | if (!circuit->snd_stream) |
2024 | return ISIS_ERROR; | |
e38e0df0 | 2025 | |
17c9dcd5 CF |
2026 | isis_circuit_stream(circuit, &circuit->snd_stream); |
2027 | fill_fixed_hdr((level == ISIS_LEVEL1) ? L1_PARTIAL_SEQ_NUM | |
2028 | : L2_PARTIAL_SEQ_NUM, | |
2029 | circuit->snd_stream); | |
2030 | ||
2031 | size_t len_pointer = stream_get_endp(circuit->snd_stream); | |
2032 | stream_putw(circuit->snd_stream, 0); /* length is filled in later */ | |
2033 | stream_put(circuit->snd_stream, isis->sysid, ISIS_SYS_ID_LEN); | |
2034 | stream_putc(circuit->snd_stream, circuit->idx); | |
2035 | ||
2036 | struct isis_passwd *passwd = (level == ISIS_LEVEL1) | |
2037 | ? &circuit->area->area_passwd | |
2038 | : &circuit->area->domain_passwd; | |
2039 | ||
2040 | struct isis_tlvs *tlvs = isis_alloc_tlvs(); | |
2041 | ||
2042 | if (CHECK_FLAG(passwd->snp_auth, SNP_AUTH_SEND)) | |
2043 | isis_tlvs_add_auth(tlvs, passwd); | |
2044 | ||
2045 | size_t tlv_start = stream_get_endp(circuit->snd_stream); | |
af8ac8f9 CF |
2046 | if (isis_pack_tlvs(tlvs, circuit->snd_stream, len_pointer, false, |
2047 | false)) { | |
17c9dcd5 CF |
2048 | isis_free_tlvs(tlvs); |
2049 | return ISIS_WARNING; | |
2050 | } | |
2051 | isis_free_tlvs(tlvs); | |
2052 | ||
2053 | uint16_t num_lsps = | |
2054 | get_max_lsp_count(STREAM_WRITEABLE(circuit->snd_stream)); | |
f390d2c7 | 2055 | |
d62a17ae | 2056 | while (1) { |
17c9dcd5 CF |
2057 | tlvs = isis_alloc_tlvs(); |
2058 | if (CHECK_FLAG(passwd->snp_auth, SNP_AUTH_SEND)) | |
2059 | isis_tlvs_add_auth(tlvs, passwd); | |
2060 | ||
2061 | for (dnode_t *dnode = | |
2062 | dict_first(circuit->area->lspdb[level - 1]); | |
2063 | dnode; dnode = dict_next(circuit->area->lspdb[level - 1], | |
2064 | dnode)) { | |
2065 | struct isis_lsp *lsp = dnode_get(dnode); | |
2066 | ||
2067 | if (ISIS_CHECK_FLAG(lsp->SSNflags, circuit)) | |
2068 | isis_tlvs_add_lsp_entry(tlvs, lsp); | |
eb5d44eb | 2069 | |
17c9dcd5 CF |
2070 | if (tlvs->lsp_entries.count == num_lsps) |
2071 | break; | |
2072 | } | |
2073 | ||
2074 | if (!tlvs->lsp_entries.count) { | |
2075 | isis_free_tlvs(tlvs); | |
d62a17ae | 2076 | return ISIS_OK; |
2077 | } | |
2078 | ||
17c9dcd5 CF |
2079 | stream_set_endp(circuit->snd_stream, tlv_start); |
2080 | if (isis_pack_tlvs(tlvs, circuit->snd_stream, len_pointer, | |
af8ac8f9 | 2081 | false, false)) { |
17c9dcd5 CF |
2082 | isis_free_tlvs(tlvs); |
2083 | return ISIS_WARNING; | |
d62a17ae | 2084 | } |
2085 | ||
2086 | if (isis->debugs & DEBUG_SNP_PACKETS) { | |
2087 | zlog_debug( | |
2088 | "ISIS-Snp (%s): Sending L%d PSNP on %s, length %zd", | |
2089 | circuit->area->area_tag, level, | |
2090 | circuit->interface->name, | |
2091 | stream_get_endp(circuit->snd_stream)); | |
17c9dcd5 CF |
2092 | log_multiline(LOG_DEBUG, " ", "%s", |
2093 | isis_format_tlvs(tlvs)); | |
d62a17ae | 2094 | if (isis->debugs & DEBUG_PACKET_DUMP) |
2095 | zlog_dump_data( | |
2096 | STREAM_DATA(circuit->snd_stream), | |
2097 | stream_get_endp(circuit->snd_stream)); | |
2098 | } | |
2099 | ||
17c9dcd5 | 2100 | int retval = circuit->tx(circuit, level); |
d62a17ae | 2101 | if (retval != ISIS_OK) { |
1a7ecb96 | 2102 | flog_err(EC_ISIS_PACKET, |
1c50c1c0 QY |
2103 | "ISIS-Snp (%s): Send L%d PSNP on %s failed", |
2104 | circuit->area->area_tag, level, | |
2105 | circuit->interface->name); | |
17c9dcd5 | 2106 | isis_free_tlvs(tlvs); |
d62a17ae | 2107 | return retval; |
2108 | } | |
2109 | ||
2110 | /* | |
2111 | * sending succeeded, we can clear SSN flags of this circuit | |
2112 | * for the LSPs in list | |
2113 | */ | |
17c9dcd5 CF |
2114 | struct isis_lsp_entry *entry_head; |
2115 | entry_head = (struct isis_lsp_entry *)tlvs->lsp_entries.head; | |
2116 | for (struct isis_lsp_entry *entry = entry_head; entry; | |
2117 | entry = entry->next) | |
2118 | ISIS_CLEAR_FLAG(entry->lsp->SSNflags, circuit); | |
2119 | isis_free_tlvs(tlvs); | |
d62a17ae | 2120 | } |
2121 | ||
17c9dcd5 | 2122 | return ISIS_OK; |
eb5d44eb | 2123 | } |
2124 | ||
d62a17ae | 2125 | int send_l1_psnp(struct thread *thread) |
eb5d44eb | 2126 | { |
2127 | ||
d62a17ae | 2128 | struct isis_circuit *circuit; |
2129 | int retval = ISIS_OK; | |
eb5d44eb | 2130 | |
d62a17ae | 2131 | circuit = THREAD_ARG(thread); |
2132 | assert(circuit); | |
eb5d44eb | 2133 | |
d62a17ae | 2134 | circuit->t_send_psnp[0] = NULL; |
eb5d44eb | 2135 | |
d62a17ae | 2136 | send_psnp(1, circuit); |
2137 | /* set next timer thread */ | |
2138 | thread_add_timer(master, send_l1_psnp, circuit, | |
2139 | isis_jitter(circuit->psnp_interval[0], PSNP_JITTER), | |
2140 | &circuit->t_send_psnp[0]); | |
eb5d44eb | 2141 | |
d62a17ae | 2142 | return retval; |
eb5d44eb | 2143 | } |
2144 | ||
2145 | /* | |
2146 | * 7.3.15.4 action on expiration of partial SNP interval | |
2147 | * level 2 | |
2148 | */ | |
d62a17ae | 2149 | int send_l2_psnp(struct thread *thread) |
eb5d44eb | 2150 | { |
d62a17ae | 2151 | struct isis_circuit *circuit; |
2152 | int retval = ISIS_OK; | |
eb5d44eb | 2153 | |
d62a17ae | 2154 | circuit = THREAD_ARG(thread); |
2155 | assert(circuit); | |
eb5d44eb | 2156 | |
d62a17ae | 2157 | circuit->t_send_psnp[1] = NULL; |
eb5d44eb | 2158 | |
d62a17ae | 2159 | send_psnp(2, circuit); |
eb5d44eb | 2160 | |
d62a17ae | 2161 | /* set next timer thread */ |
2162 | thread_add_timer(master, send_l2_psnp, circuit, | |
2163 | isis_jitter(circuit->psnp_interval[1], PSNP_JITTER), | |
2164 | &circuit->t_send_psnp[1]); | |
eb5d44eb | 2165 | |
d62a17ae | 2166 | return retval; |
eb5d44eb | 2167 | } |
2168 | ||
eb5d44eb | 2169 | /* |
2170 | * ISO 10589 - 7.3.14.3 | |
2171 | */ | |
9b39405f | 2172 | void send_lsp(void *arg, struct isis_lsp *lsp, enum isis_tx_type tx_type) |
eb5d44eb | 2173 | { |
9b39405f | 2174 | struct isis_circuit *circuit = arg; |
d62a17ae | 2175 | int clear_srm = 1; |
2176 | int retval = ISIS_OK; | |
2177 | ||
d62a17ae | 2178 | if (circuit->state != C_STATE_UP || circuit->is_passive == 1) |
2179 | goto out; | |
2180 | ||
2181 | /* | |
2182 | * Do not send if levels do not match | |
2183 | */ | |
2184 | if (!(lsp->level & circuit->is_type)) | |
2185 | goto out; | |
2186 | ||
2187 | /* | |
2188 | * Do not send if we do not have adjacencies in state up on the circuit | |
2189 | */ | |
2190 | if (circuit->upadjcount[lsp->level - 1] == 0) | |
2191 | goto out; | |
2192 | ||
2193 | /* stream_copy will assert and stop program execution if LSP is larger | |
2194 | * than | |
2195 | * the circuit's MTU. So handle and log this case here. */ | |
2196 | if (stream_get_endp(lsp->pdu) > stream_get_size(circuit->snd_stream)) { | |
af4c2728 | 2197 | flog_err( |
1a7ecb96 | 2198 | EC_ISIS_PACKET, |
af8ac8f9 CF |
2199 | "ISIS-Upd (%s): Can't send L%d LSP %s, seq 0x%08" PRIx32 |
2200 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 | |
2201 | "s on %s. LSP Size is %zu while interface stream size is %zu.", | |
d62a17ae | 2202 | circuit->area->area_tag, lsp->level, |
af8ac8f9 CF |
2203 | rawlspid_print(lsp->hdr.lsp_id), lsp->hdr.seqno, |
2204 | lsp->hdr.checksum, lsp->hdr.rem_lifetime, | |
d62a17ae | 2205 | circuit->interface->name, stream_get_endp(lsp->pdu), |
2206 | stream_get_size(circuit->snd_stream)); | |
2207 | if (isis->debugs & DEBUG_PACKET_DUMP) | |
2208 | zlog_dump_data(STREAM_DATA(lsp->pdu), | |
2209 | stream_get_endp(lsp->pdu)); | |
2210 | retval = ISIS_ERROR; | |
2211 | goto out; | |
2212 | } | |
eb5d44eb | 2213 | |
d62a17ae | 2214 | /* copy our lsp to the send buffer */ |
2215 | stream_copy(circuit->snd_stream, lsp->pdu); | |
2216 | ||
1cbd5b37 CF |
2217 | if (tx_type == TX_LSP_CIRCUIT_SCOPED) { |
2218 | stream_putc_at(circuit->snd_stream, 4, FS_LINK_STATE); | |
2219 | stream_putc_at(circuit->snd_stream, 7, L2_CIRCUIT_FLOODING_SCOPE); | |
2220 | } | |
2221 | ||
d62a17ae | 2222 | if (isis->debugs & DEBUG_UPDATE_PACKETS) { |
af8ac8f9 CF |
2223 | zlog_debug("ISIS-Upd (%s): Sending L%d LSP %s, seq 0x%08" PRIx32 |
2224 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 | |
2225 | "s on %s", | |
2226 | circuit->area->area_tag, lsp->level, | |
2227 | rawlspid_print(lsp->hdr.lsp_id), lsp->hdr.seqno, | |
2228 | lsp->hdr.checksum, lsp->hdr.rem_lifetime, | |
2229 | circuit->interface->name); | |
d62a17ae | 2230 | if (isis->debugs & DEBUG_PACKET_DUMP) |
2231 | zlog_dump_data(STREAM_DATA(circuit->snd_stream), | |
2232 | stream_get_endp(circuit->snd_stream)); | |
2233 | } | |
3f045a08 | 2234 | |
d62a17ae | 2235 | clear_srm = 0; |
2236 | retval = circuit->tx(circuit, lsp->level); | |
2237 | if (retval != ISIS_OK) { | |
1a7ecb96 | 2238 | flog_err(EC_ISIS_PACKET, |
1c50c1c0 QY |
2239 | "ISIS-Upd (%s): Send L%d LSP on %s failed %s", |
2240 | circuit->area->area_tag, lsp->level, | |
2241 | circuit->interface->name, | |
2242 | (retval == ISIS_WARNING) ? "temporarily" | |
2243 | : "permanently"); | |
d62a17ae | 2244 | } |
f390d2c7 | 2245 | |
cfd1f27b | 2246 | out: |
d62a17ae | 2247 | if (clear_srm |
2248 | || (retval == ISIS_OK && circuit->circ_type == CIRCUIT_T_BROADCAST) | |
2249 | || (retval != ISIS_OK && retval != ISIS_WARNING)) { | |
2250 | /* SRM flag will trigger retransmission. We will not retransmit | |
2251 | * if we | |
2252 | * encountered a fatal error. | |
2253 | * On success, they should only be cleared if it's a broadcast | |
2254 | * circuit. | |
2255 | * On a P2P circuit, we will wait for the ack from the neighbor | |
2256 | * to clear | |
2257 | * the fag. | |
2258 | */ | |
9b39405f | 2259 | isis_tx_queue_del(circuit->tx_queue, lsp); |
d62a17ae | 2260 | } |
f390d2c7 | 2261 | } |