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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 | |
eb5d44eb | 39 | #include "isisd/isis_constants.h" |
40 | #include "isisd/isis_common.h" | |
3f045a08 | 41 | #include "isisd/isis_flags.h" |
eb5d44eb | 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" | |
eb5d44eb | 47 | #include "isisd/isisd.h" |
48 | #include "isisd/isis_dynhn.h" | |
49 | #include "isisd/isis_lsp.h" | |
50 | #include "isisd/isis_pdu.h" | |
51 | #include "isisd/iso_checksum.h" | |
52 | #include "isisd/isis_csm.h" | |
53 | #include "isisd/isis_events.h" | |
f8c06e2c | 54 | #include "isisd/isis_te.h" |
99894f9a | 55 | #include "isisd/isis_mt.h" |
841791b6 | 56 | #include "isisd/isis_tlvs.h" |
54ece698 | 57 | #include "isisd/isis_errors.h" |
8e6fb83b | 58 | #include "isisd/fabricd.h" |
9b39405f | 59 | #include "isisd/isis_tx_queue.h" |
39bb53d6 | 60 | #include "isisd/isis_pdu_counter.h" |
2a1c520e | 61 | #include "isisd/isis_nb.h" |
eb5d44eb | 62 | |
af8ac8f9 CF |
63 | static int ack_lsp(struct isis_lsp_hdr *hdr, struct isis_circuit *circuit, |
64 | int level) | |
eb5d44eb | 65 | { |
af8ac8f9 CF |
66 | unsigned long lenp; |
67 | int retval; | |
d7c0a89a | 68 | uint16_t length; |
af8ac8f9 CF |
69 | uint8_t pdu_type = |
70 | (level == IS_LEVEL_1) ? L1_PARTIAL_SEQ_NUM : L2_PARTIAL_SEQ_NUM; | |
d62a17ae | 71 | |
af8ac8f9 | 72 | isis_circuit_stream(circuit, &circuit->snd_stream); |
3f045a08 | 73 | |
af8ac8f9 | 74 | fill_fixed_hdr(pdu_type, circuit->snd_stream); |
d62a17ae | 75 | |
af8ac8f9 CF |
76 | lenp = stream_get_endp(circuit->snd_stream); |
77 | stream_putw(circuit->snd_stream, 0); /* PDU length */ | |
78 | stream_put(circuit->snd_stream, isis->sysid, ISIS_SYS_ID_LEN); | |
79 | stream_putc(circuit->snd_stream, circuit->idx); | |
80 | stream_putc(circuit->snd_stream, 9); /* code */ | |
81 | stream_putc(circuit->snd_stream, 16); /* len */ | |
d62a17ae | 82 | |
af8ac8f9 CF |
83 | stream_putw(circuit->snd_stream, hdr->rem_lifetime); |
84 | stream_put(circuit->snd_stream, hdr->lsp_id, ISIS_SYS_ID_LEN + 2); | |
85 | stream_putl(circuit->snd_stream, hdr->seqno); | |
86 | stream_putw(circuit->snd_stream, hdr->checksum); | |
3f045a08 | 87 | |
d7c0a89a | 88 | length = (uint16_t)stream_get_endp(circuit->snd_stream); |
af8ac8f9 CF |
89 | /* Update PDU length */ |
90 | stream_putw_at(circuit->snd_stream, lenp, length); | |
3f045a08 | 91 | |
39bb53d6 | 92 | pdu_counter_count(circuit->area->pdu_tx_counters, pdu_type); |
af8ac8f9 CF |
93 | retval = circuit->tx(circuit, level); |
94 | if (retval != ISIS_OK) | |
1a7ecb96 | 95 | flog_err(EC_ISIS_PACKET, |
1c50c1c0 QY |
96 | "ISIS-Upd (%s): Send L%d LSP PSNP on %s failed", |
97 | circuit->area->area_tag, level, | |
98 | circuit->interface->name); | |
d62a17ae | 99 | |
100 | return retval; | |
eb5d44eb | 101 | } |
102 | ||
eb5d44eb | 103 | /* |
d62a17ae | 104 | * RECEIVE SIDE |
eb5d44eb | 105 | */ |
106 | ||
0c1bd758 CF |
107 | struct iih_info { |
108 | struct isis_circuit *circuit; | |
d7c0a89a | 109 | uint8_t *ssnpa; |
0c1bd758 | 110 | int level; |
eb5d44eb | 111 | |
0c1bd758 CF |
112 | uint8_t circ_type; |
113 | uint8_t sys_id[ISIS_SYS_ID_LEN]; | |
114 | uint16_t holdtime; | |
115 | uint16_t pdu_len; | |
d62a17ae | 116 | |
0c1bd758 | 117 | uint8_t circuit_id; |
eb5d44eb | 118 | |
0c1bd758 CF |
119 | uint8_t priority; |
120 | uint8_t dis[ISIS_SYS_ID_LEN + 1]; | |
d8fba7d9 | 121 | |
0c1bd758 CF |
122 | bool v4_usable; |
123 | bool v6_usable; | |
eb5d44eb | 124 | |
0c1bd758 CF |
125 | struct isis_tlvs *tlvs; |
126 | }; | |
eb5d44eb | 127 | |
0c1bd758 CF |
128 | static int process_p2p_hello(struct iih_info *iih) |
129 | { | |
42fe2621 CF |
130 | struct isis_threeway_adj *tw_adj = iih->tlvs->threeway_adj; |
131 | if (tw_adj) { | |
132 | if (tw_adj->state > ISIS_THREEWAY_DOWN) { | |
e740f9c1 | 133 | if (IS_DEBUG_ADJ_PACKETS) { |
9165c5f5 | 134 | zlog_debug("ISIS-Adj (%s): Rcvd P2P IIH from (%s) with invalid three-way state: %d", |
42fe2621 CF |
135 | iih->circuit->area->area_tag, |
136 | iih->circuit->interface->name, | |
137 | tw_adj->state); | |
138 | } | |
139 | return ISIS_WARNING; | |
140 | } | |
141 | ||
142 | if (tw_adj->neighbor_set | |
143 | && (memcmp(tw_adj->neighbor_id, isis->sysid, ISIS_SYS_ID_LEN) | |
144 | || tw_adj->neighbor_circuit_id != (uint32_t) iih->circuit->idx)) { | |
145 | ||
e740f9c1 | 146 | if (IS_DEBUG_ADJ_PACKETS) { |
9165c5f5 | 147 | zlog_debug("ISIS-Adj (%s): Rcvd P2P IIH from (%s) which lists IS/Circuit different from us as neighbor.", |
42fe2621 CF |
148 | iih->circuit->area->area_tag, |
149 | iih->circuit->interface->name); | |
150 | } | |
151 | ||
152 | return ISIS_WARNING; | |
153 | } | |
154 | } | |
155 | ||
d62a17ae | 156 | /* |
157 | * My interpertation of the ISO, if no adj exists we will create one for | |
158 | * the circuit | |
159 | */ | |
0c1bd758 | 160 | struct isis_adjacency *adj = iih->circuit->u.p2p.neighbor; |
d62a17ae | 161 | /* If an adjacency exists, check it is with the source of the hello |
162 | * packets */ | |
163 | if (adj) { | |
0c1bd758 | 164 | if (memcmp(iih->sys_id, adj->sysid, ISIS_SYS_ID_LEN)) { |
d62a17ae | 165 | zlog_debug( |
166 | "hello source and adjacency do not match, set adj down\n"); | |
16167b31 | 167 | isis_adj_state_change(&adj, ISIS_ADJ_DOWN, |
d62a17ae | 168 | "adj do not exist"); |
0c1bd758 | 169 | return ISIS_OK; |
f390d2c7 | 170 | } |
d62a17ae | 171 | } |
0c1bd758 | 172 | if (!adj || adj->level != iih->circ_type) { |
d62a17ae | 173 | if (!adj) { |
0c1bd758 CF |
174 | adj = isis_new_adj(iih->sys_id, NULL, iih->circ_type, |
175 | iih->circuit); | |
d62a17ae | 176 | } else { |
0c1bd758 | 177 | adj->level = iih->circ_type; |
f390d2c7 | 178 | } |
0c1bd758 | 179 | iih->circuit->u.p2p.neighbor = adj; |
d62a17ae | 180 | /* Build lsp with the new neighbor entry when a new |
181 | * adjacency is formed. Set adjacency circuit type to | |
182 | * IIH PDU header circuit type before lsp is regenerated | |
183 | * when an adjacency is up. This will result in the new | |
184 | * adjacency entry getting added to the lsp tlv neighbor list. | |
185 | */ | |
0c1bd758 | 186 | adj->circuit_t = iih->circ_type; |
16167b31 | 187 | isis_adj_state_change(&adj, ISIS_ADJ_INITIALIZING, NULL); |
d62a17ae | 188 | adj->sys_type = ISIS_SYSTYPE_UNKNOWN; |
f390d2c7 | 189 | } |
eb5d44eb | 190 | |
df04b6af | 191 | if (tw_adj) |
42fe2621 CF |
192 | adj->ext_circuit_id = tw_adj->local_circuit_id; |
193 | ||
d62a17ae | 194 | /* 8.2.6 Monitoring point-to-point adjacencies */ |
0c1bd758 | 195 | adj->hold_time = iih->holdtime; |
d62a17ae | 196 | adj->last_upd = time(NULL); |
197 | ||
0c1bd758 CF |
198 | bool changed; |
199 | isis_tlvs_to_adj(iih->tlvs, adj, &changed); | |
200 | changed |= tlvs_to_adj_mt_set(iih->tlvs, iih->v4_usable, iih->v6_usable, | |
201 | adj); | |
d62a17ae | 202 | |
d62a17ae | 203 | /* lets take care of the expiry */ |
204 | THREAD_TIMER_OFF(adj->t_expire); | |
205 | thread_add_timer(master, isis_adj_expire, adj, (long)adj->hold_time, | |
206 | &adj->t_expire); | |
207 | ||
8e6fb83b CF |
208 | /* While fabricds initial sync is in progress, ignore hellos from other |
209 | * interfaces than the one we are performing the initial sync on. */ | |
210 | if (fabricd_initial_sync_is_in_progress(iih->circuit->area) | |
211 | && fabricd_initial_sync_circuit(iih->circuit->area) != iih->circuit) | |
212 | return ISIS_OK; | |
213 | ||
d62a17ae | 214 | /* 8.2.5.2 a) a match was detected */ |
0c1bd758 CF |
215 | if (isis_tlvs_area_addresses_match(iih->tlvs, |
216 | iih->circuit->area->area_addrs)) { | |
d62a17ae | 217 | /* 8.2.5.2 a) 2) If the system is L1 - table 5 */ |
0c1bd758 CF |
218 | if (iih->circuit->area->is_type == IS_LEVEL_1) { |
219 | switch (iih->circ_type) { | |
d62a17ae | 220 | case IS_LEVEL_1: |
221 | case IS_LEVEL_1_AND_2: | |
42fe2621 CF |
222 | if (adj->adj_state != ISIS_ADJ_UP |
223 | || adj->adj_usage == ISIS_ADJ_LEVEL1) { | |
224 | isis_adj_process_threeway(adj, tw_adj, | |
225 | ISIS_ADJ_LEVEL1); | |
d62a17ae | 226 | } |
227 | break; | |
228 | case IS_LEVEL_2: | |
229 | if (adj->adj_state != ISIS_ADJ_UP) { | |
230 | /* (7) reject - wrong system type event | |
231 | */ | |
232 | zlog_warn("wrongSystemType"); | |
0c1bd758 | 233 | return ISIS_WARNING; |
d62a17ae | 234 | } else if (adj->adj_usage == ISIS_ADJ_LEVEL1) { |
235 | /* (6) down - wrong system */ | |
16167b31 | 236 | isis_adj_state_change(&adj, |
d62a17ae | 237 | ISIS_ADJ_DOWN, |
238 | "Wrong System"); | |
239 | } | |
240 | break; | |
241 | } | |
f390d2c7 | 242 | } |
d62a17ae | 243 | |
244 | /* 8.2.5.2 a) 3) If the system is L1L2 - table 6 */ | |
0c1bd758 CF |
245 | if (iih->circuit->area->is_type == IS_LEVEL_1_AND_2) { |
246 | switch (iih->circ_type) { | |
d62a17ae | 247 | case IS_LEVEL_1: |
42fe2621 CF |
248 | if (adj->adj_state != ISIS_ADJ_UP |
249 | || adj->adj_usage == ISIS_ADJ_LEVEL1) { | |
250 | isis_adj_process_threeway(adj, tw_adj, | |
251 | ISIS_ADJ_LEVEL1); | |
d62a17ae | 252 | } else if ((adj->adj_usage |
253 | == ISIS_ADJ_LEVEL1AND2) | |
254 | || (adj->adj_usage | |
255 | == ISIS_ADJ_LEVEL2)) { | |
256 | /* (8) down - wrong system */ | |
16167b31 | 257 | isis_adj_state_change(&adj, |
d62a17ae | 258 | ISIS_ADJ_DOWN, |
259 | "Wrong System"); | |
260 | } | |
261 | break; | |
262 | case IS_LEVEL_2: | |
42fe2621 CF |
263 | if (adj->adj_state != ISIS_ADJ_UP |
264 | || adj->adj_usage == ISIS_ADJ_LEVEL2) { | |
265 | isis_adj_process_threeway(adj, tw_adj, | |
266 | ISIS_ADJ_LEVEL2); | |
d62a17ae | 267 | } else if ((adj->adj_usage == ISIS_ADJ_LEVEL1) |
268 | || (adj->adj_usage | |
269 | == ISIS_ADJ_LEVEL1AND2)) { | |
270 | /* (8) down - wrong system */ | |
16167b31 | 271 | isis_adj_state_change(&adj, |
d62a17ae | 272 | ISIS_ADJ_DOWN, |
273 | "Wrong System"); | |
d62a17ae | 274 | } |
275 | break; | |
276 | case IS_LEVEL_1_AND_2: | |
42fe2621 CF |
277 | if (adj->adj_state != ISIS_ADJ_UP |
278 | || adj->adj_usage == ISIS_ADJ_LEVEL1AND2) { | |
279 | isis_adj_process_threeway(adj, tw_adj, | |
280 | ISIS_ADJ_LEVEL1AND2); | |
d62a17ae | 281 | } else if ((adj->adj_usage == ISIS_ADJ_LEVEL1) |
282 | || (adj->adj_usage | |
283 | == ISIS_ADJ_LEVEL2)) { | |
284 | /* (8) down - wrong system */ | |
16167b31 | 285 | isis_adj_state_change(&adj, |
d62a17ae | 286 | ISIS_ADJ_DOWN, |
287 | "Wrong System"); | |
d62a17ae | 288 | } |
289 | break; | |
290 | } | |
f390d2c7 | 291 | } |
d62a17ae | 292 | |
293 | /* 8.2.5.2 a) 4) If the system is L2 - table 7 */ | |
0c1bd758 CF |
294 | if (iih->circuit->area->is_type == IS_LEVEL_2) { |
295 | switch (iih->circ_type) { | |
d62a17ae | 296 | case IS_LEVEL_1: |
297 | if (adj->adj_state != ISIS_ADJ_UP) { | |
298 | /* (5) reject - wrong system type event | |
299 | */ | |
300 | zlog_warn("wrongSystemType"); | |
0c1bd758 | 301 | return ISIS_WARNING; |
d62a17ae | 302 | } else if ((adj->adj_usage |
303 | == ISIS_ADJ_LEVEL1AND2) | |
304 | || (adj->adj_usage | |
305 | == ISIS_ADJ_LEVEL2)) { | |
306 | /* (6) down - wrong system */ | |
16167b31 | 307 | isis_adj_state_change(&adj, |
d62a17ae | 308 | ISIS_ADJ_DOWN, |
309 | "Wrong System"); | |
310 | } | |
311 | break; | |
312 | case IS_LEVEL_1_AND_2: | |
313 | case IS_LEVEL_2: | |
42fe2621 CF |
314 | if (adj->adj_state != ISIS_ADJ_UP |
315 | || adj->adj_usage == ISIS_ADJ_LEVEL2) { | |
316 | isis_adj_process_threeway(adj, tw_adj, | |
317 | ISIS_ADJ_LEVEL2); | |
d62a17ae | 318 | } else if (adj->adj_usage |
319 | == ISIS_ADJ_LEVEL1AND2) { | |
320 | /* (6) down - wrong system */ | |
16167b31 | 321 | isis_adj_state_change(&adj, |
d62a17ae | 322 | ISIS_ADJ_DOWN, |
323 | "Wrong System"); | |
d62a17ae | 324 | } |
325 | break; | |
326 | } | |
f390d2c7 | 327 | } |
d62a17ae | 328 | } |
329 | /* 8.2.5.2 b) if no match was detected */ | |
0c1bd758 CF |
330 | else if (listcount(iih->circuit->area->area_addrs) > 0) { |
331 | if (iih->circuit->area->is_type == IS_LEVEL_1) { | |
d62a17ae | 332 | /* 8.2.5.2 b) 1) is_type L1 and adj is not up */ |
333 | if (adj->adj_state != ISIS_ADJ_UP) { | |
16167b31 | 334 | isis_adj_state_change(&adj, ISIS_ADJ_DOWN, |
d62a17ae | 335 | "Area Mismatch"); |
336 | /* 8.2.5.2 b) 2)is_type L1 and adj is up */ | |
337 | } else { | |
16167b31 | 338 | isis_adj_state_change(&adj, ISIS_ADJ_DOWN, |
d62a17ae | 339 | "Down - Area Mismatch"); |
340 | } | |
f390d2c7 | 341 | } |
d62a17ae | 342 | /* 8.2.5.2 b 3 If the system is L2 or L1L2 - table 8 */ |
343 | else { | |
0c1bd758 | 344 | switch (iih->circ_type) { |
d62a17ae | 345 | case IS_LEVEL_1: |
346 | if (adj->adj_state != ISIS_ADJ_UP) { | |
347 | /* (6) reject - Area Mismatch event */ | |
348 | zlog_warn("AreaMismatch"); | |
0c1bd758 | 349 | return ISIS_WARNING; |
d62a17ae | 350 | } else if (adj->adj_usage == ISIS_ADJ_LEVEL1) { |
351 | /* (7) down - area mismatch */ | |
16167b31 | 352 | isis_adj_state_change(&adj, |
d62a17ae | 353 | ISIS_ADJ_DOWN, |
354 | "Area Mismatch"); | |
355 | ||
356 | } else if ((adj->adj_usage | |
357 | == ISIS_ADJ_LEVEL1AND2) | |
358 | || (adj->adj_usage | |
359 | == ISIS_ADJ_LEVEL2)) { | |
360 | /* (7) down - wrong system */ | |
16167b31 | 361 | isis_adj_state_change(&adj, |
d62a17ae | 362 | ISIS_ADJ_DOWN, |
363 | "Wrong System"); | |
364 | } | |
365 | break; | |
366 | case IS_LEVEL_1_AND_2: | |
367 | case IS_LEVEL_2: | |
42fe2621 CF |
368 | if (adj->adj_state != ISIS_ADJ_UP |
369 | || adj->adj_usage == ISIS_ADJ_LEVEL2) { | |
370 | isis_adj_process_threeway(adj, tw_adj, | |
371 | ISIS_ADJ_LEVEL2); | |
d62a17ae | 372 | } else if (adj->adj_usage == ISIS_ADJ_LEVEL1) { |
373 | /* (7) down - wrong system */ | |
16167b31 | 374 | isis_adj_state_change(&adj, |
d62a17ae | 375 | ISIS_ADJ_DOWN, |
376 | "Wrong System"); | |
377 | } else if (adj->adj_usage | |
378 | == ISIS_ADJ_LEVEL1AND2) { | |
0c1bd758 | 379 | if (iih->circ_type == IS_LEVEL_2) { |
d62a17ae | 380 | /* (7) down - wrong system */ |
381 | isis_adj_state_change( | |
16167b31 | 382 | &adj, ISIS_ADJ_DOWN, |
d62a17ae | 383 | "Wrong System"); |
384 | } else { | |
385 | /* (7) down - area mismatch */ | |
386 | isis_adj_state_change( | |
16167b31 | 387 | &adj, ISIS_ADJ_DOWN, |
d62a17ae | 388 | "Area Mismatch"); |
389 | } | |
d62a17ae | 390 | } |
391 | break; | |
392 | } | |
f390d2c7 | 393 | } |
d62a17ae | 394 | } else { |
395 | /* down - area mismatch */ | |
16167b31 | 396 | isis_adj_state_change(&adj, ISIS_ADJ_DOWN, "Area Mismatch"); |
f390d2c7 | 397 | } |
d8fba7d9 | 398 | |
16167b31 DS |
399 | if (adj) { |
400 | if (adj->adj_state == ISIS_ADJ_UP && changed) { | |
401 | lsp_regenerate_schedule( | |
402 | adj->circuit->area, | |
403 | isis_adj_usage2levels(adj->adj_usage), 0); | |
404 | } | |
eb5d44eb | 405 | |
16167b31 DS |
406 | /* 8.2.5.2 c) if the action was up - comparing circuit IDs */ |
407 | /* FIXME - Missing parts */ | |
d62a17ae | 408 | |
16167b31 DS |
409 | /* some of my own understanding of the ISO, why the heck does |
410 | * it not say what should I change the system_type to... | |
411 | */ | |
412 | switch (adj->adj_usage) { | |
413 | case ISIS_ADJ_LEVEL1: | |
414 | adj->sys_type = ISIS_SYSTYPE_L1_IS; | |
415 | break; | |
416 | case ISIS_ADJ_LEVEL2: | |
417 | adj->sys_type = ISIS_SYSTYPE_L2_IS; | |
418 | break; | |
419 | case ISIS_ADJ_LEVEL1AND2: | |
420 | adj->sys_type = ISIS_SYSTYPE_L2_IS; | |
421 | break; | |
422 | case ISIS_ADJ_NONE: | |
423 | adj->sys_type = ISIS_SYSTYPE_UNKNOWN; | |
424 | break; | |
425 | } | |
d62a17ae | 426 | } |
eb5d44eb | 427 | |
e740f9c1 | 428 | if (IS_DEBUG_ADJ_PACKETS) { |
d62a17ae | 429 | zlog_debug( |
430 | "ISIS-Adj (%s): Rcvd P2P IIH from (%s), cir type %s," | |
c59f88c8 | 431 | " cir id %hhu, length %" PRIu16, |
0c1bd758 CF |
432 | iih->circuit->area->area_tag, |
433 | iih->circuit->interface->name, | |
434 | circuit_t2string(iih->circuit->is_type), | |
435 | iih->circuit->circuit_id, iih->pdu_len); | |
d62a17ae | 436 | } |
eb5d44eb | 437 | |
0c1bd758 | 438 | return ISIS_OK; |
eb5d44eb | 439 | } |
440 | ||
0c1bd758 | 441 | static int process_lan_hello(struct iih_info *iih) |
eb5d44eb | 442 | { |
d62a17ae | 443 | struct isis_adjacency *adj; |
0c1bd758 CF |
444 | adj = isis_adj_lookup(iih->sys_id, |
445 | iih->circuit->u.bc.adjdb[iih->level - 1]); | |
446 | if ((adj == NULL) || (memcmp(adj->snpa, iih->ssnpa, ETH_ALEN)) | |
447 | || (adj->level != iih->level)) { | |
448 | if (!adj) { | |
449 | /* Do as in 8.4.2.5 */ | |
450 | adj = isis_new_adj(iih->sys_id, iih->ssnpa, iih->level, | |
451 | iih->circuit); | |
452 | } else { | |
453 | if (iih->ssnpa) { | |
454 | memcpy(adj->snpa, iih->ssnpa, 6); | |
455 | } else { | |
456 | memset(adj->snpa, ' ', 6); | |
457 | } | |
458 | adj->level = iih->level; | |
459 | } | |
16167b31 | 460 | isis_adj_state_change(&adj, ISIS_ADJ_INITIALIZING, NULL); |
d62a17ae | 461 | |
0c1bd758 CF |
462 | if (iih->level == IS_LEVEL_1) |
463 | adj->sys_type = ISIS_SYSTYPE_L1_IS; | |
464 | else | |
465 | adj->sys_type = ISIS_SYSTYPE_L2_IS; | |
466 | list_delete_all_node( | |
467 | iih->circuit->u.bc.lan_neighs[iih->level - 1]); | |
468 | isis_adj_build_neigh_list( | |
469 | iih->circuit->u.bc.adjdb[iih->level - 1], | |
470 | iih->circuit->u.bc.lan_neighs[iih->level - 1]); | |
471 | } | |
472 | ||
473 | if (adj->dis_record[iih->level - 1].dis == ISIS_IS_DIS) { | |
d7c0a89a QY |
474 | uint8_t *dis = (iih->level == 1) |
475 | ? iih->circuit->u.bc.l1_desig_is | |
476 | : iih->circuit->u.bc.l2_desig_is; | |
0c1bd758 CF |
477 | |
478 | if (memcmp(dis, iih->dis, ISIS_SYS_ID_LEN + 1)) { | |
479 | thread_add_event(master, isis_event_dis_status_change, | |
480 | iih->circuit, 0, NULL); | |
481 | memcpy(dis, iih->dis, ISIS_SYS_ID_LEN + 1); | |
482 | } | |
d62a17ae | 483 | } |
3f045a08 | 484 | |
0c1bd758 CF |
485 | adj->circuit_t = iih->circ_type; |
486 | adj->hold_time = iih->holdtime; | |
487 | adj->last_upd = time(NULL); | |
488 | adj->prio[iih->level - 1] = iih->priority; | |
489 | memcpy(adj->lanid, iih->dis, ISIS_SYS_ID_LEN + 1); | |
3f045a08 | 490 | |
0c1bd758 CF |
491 | bool changed; |
492 | isis_tlvs_to_adj(iih->tlvs, adj, &changed); | |
493 | changed |= tlvs_to_adj_mt_set(iih->tlvs, iih->v4_usable, iih->v6_usable, | |
494 | adj); | |
495 | ||
496 | /* lets take care of the expiry */ | |
497 | THREAD_TIMER_OFF(adj->t_expire); | |
498 | thread_add_timer(master, isis_adj_expire, adj, (long)adj->hold_time, | |
499 | &adj->t_expire); | |
500 | ||
501 | /* | |
502 | * If the snpa for this circuit is found from LAN Neighbours TLV | |
503 | * we have two-way communication -> adjacency can be put to state "up" | |
504 | */ | |
505 | bool own_snpa_found = | |
506 | isis_tlvs_own_snpa_found(iih->tlvs, iih->circuit->u.bc.snpa); | |
507 | ||
508 | if (adj->adj_state != ISIS_ADJ_UP) { | |
509 | if (own_snpa_found) { | |
510 | isis_adj_state_change( | |
16167b31 | 511 | &adj, ISIS_ADJ_UP, |
0c1bd758 CF |
512 | "own SNPA found in LAN Neighbours TLV"); |
513 | } | |
514 | } else { | |
515 | if (!own_snpa_found) { | |
516 | isis_adj_state_change( | |
16167b31 | 517 | &adj, ISIS_ADJ_INITIALIZING, |
0c1bd758 CF |
518 | "own SNPA not found in LAN Neighbours TLV"); |
519 | } | |
d62a17ae | 520 | } |
eb5d44eb | 521 | |
0c1bd758 CF |
522 | if (adj->adj_state == ISIS_ADJ_UP && changed) |
523 | lsp_regenerate_schedule(adj->circuit->area, iih->level, 0); | |
524 | ||
e740f9c1 | 525 | if (IS_DEBUG_ADJ_PACKETS) { |
d62a17ae | 526 | zlog_debug( |
0c1bd758 CF |
527 | "ISIS-Adj (%s): Rcvd L%d LAN IIH from %s on %s, cirType %s, cirID %u, length %zd", |
528 | iih->circuit->area->area_tag, iih->level, | |
529 | snpa_print(iih->ssnpa), iih->circuit->interface->name, | |
530 | circuit_t2string(iih->circuit->is_type), | |
531 | iih->circuit->circuit_id, | |
532 | stream_get_endp(iih->circuit->rcv_stream)); | |
d62a17ae | 533 | } |
0c1bd758 CF |
534 | return ISIS_OK; |
535 | } | |
eb5d44eb | 536 | |
17c9dcd5 CF |
537 | static int pdu_len_validate(uint16_t pdu_len, struct isis_circuit *circuit) |
538 | { | |
539 | if (pdu_len < stream_get_getp(circuit->rcv_stream) | |
540 | || pdu_len > ISO_MTU(circuit) | |
541 | || pdu_len > stream_get_endp(circuit->rcv_stream)) | |
542 | return 1; | |
543 | ||
544 | if (pdu_len < stream_get_endp(circuit->rcv_stream)) | |
545 | stream_set_endp(circuit->rcv_stream, pdu_len); | |
546 | return 0; | |
547 | } | |
548 | ||
0c1bd758 | 549 | static int process_hello(uint8_t pdu_type, struct isis_circuit *circuit, |
d7c0a89a | 550 | uint8_t *ssnpa) |
0c1bd758 | 551 | { |
3380c990 EDP |
552 | /* keep a copy of the raw pdu for NB notifications */ |
553 | size_t pdu_start = stream_get_getp(circuit->rcv_stream); | |
554 | size_t pdu_end = stream_get_endp(circuit->rcv_stream); | |
555 | char raw_pdu[pdu_end - pdu_start]; | |
0c1bd758 CF |
556 | bool p2p_hello = (pdu_type == P2P_HELLO); |
557 | int level = p2p_hello ? 0 | |
558 | : (pdu_type == L1_LAN_HELLO) ? ISIS_LEVEL1 | |
559 | : ISIS_LEVEL2; | |
560 | const char *pdu_name = | |
561 | p2p_hello | |
562 | ? "P2P IIH" | |
563 | : (level == ISIS_LEVEL1) ? "L1 LAN IIH" : "L2 LAN IIH"; | |
564 | ||
3380c990 EDP |
565 | |
566 | stream_get_from(raw_pdu, circuit->rcv_stream, pdu_start, | |
567 | pdu_end - pdu_start); | |
e740f9c1 | 568 | if (IS_DEBUG_ADJ_PACKETS) { |
0c1bd758 CF |
569 | zlog_debug("ISIS-Adj (%s): Rcvd %s on %s, cirType %s, cirID %u", |
570 | circuit->area->area_tag, pdu_name, | |
571 | circuit->interface->name, | |
572 | circuit_t2string(circuit->is_type), | |
573 | circuit->circuit_id); | |
e740f9c1 | 574 | if (IS_DEBUG_PACKET_DUMP) |
0c1bd758 CF |
575 | zlog_dump_data(STREAM_DATA(circuit->rcv_stream), |
576 | stream_get_endp(circuit->rcv_stream)); | |
577 | } | |
578 | ||
579 | if (p2p_hello) { | |
580 | if (circuit->circ_type != CIRCUIT_T_P2P) { | |
581 | zlog_warn("p2p hello on non p2p circuit"); | |
c32496ee | 582 | circuit->rej_adjacencies++; |
af6911c9 EDP |
583 | #ifndef FABRICD |
584 | isis_notif_reject_adjacency( | |
585 | circuit, "p2p hello on non p2p circuit", | |
586 | raw_pdu); | |
587 | #endif /* ifndef FABRICD */ | |
0c1bd758 CF |
588 | return ISIS_WARNING; |
589 | } | |
590 | } else { | |
591 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) { | |
592 | zlog_warn("lan hello on non broadcast circuit"); | |
c32496ee | 593 | circuit->rej_adjacencies++; |
af6911c9 EDP |
594 | #ifndef FABRICD |
595 | isis_notif_reject_adjacency( | |
596 | circuit, "lan hello on non broadcast circuit", | |
597 | raw_pdu); | |
598 | #endif /* ifndef FABRICD */ | |
0c1bd758 CF |
599 | return ISIS_WARNING; |
600 | } | |
601 | ||
602 | if (circuit->ext_domain) { | |
d62a17ae | 603 | zlog_debug( |
0c1bd758 CF |
604 | "level %d LAN Hello received over circuit with externalDomain = true", |
605 | level); | |
c32496ee | 606 | circuit->rej_adjacencies++; |
af6911c9 EDP |
607 | #ifndef FABRICD |
608 | isis_notif_reject_adjacency( | |
609 | circuit, | |
610 | "LAN Hello received over circuit with externalDomain = true", | |
611 | raw_pdu); | |
612 | #endif /* ifndef FABRICD */ | |
0c1bd758 CF |
613 | return ISIS_WARNING; |
614 | } | |
615 | ||
af8ac8f9 | 616 | if (!(circuit->is_type & level)) { |
e740f9c1 | 617 | if (IS_DEBUG_ADJ_PACKETS) { |
0c1bd758 CF |
618 | zlog_debug( |
619 | "ISIS-Adj (%s): Interface level mismatch, %s", | |
620 | circuit->area->area_tag, | |
621 | circuit->interface->name); | |
622 | } | |
c32496ee | 623 | circuit->rej_adjacencies++; |
af6911c9 EDP |
624 | #ifndef FABRICD |
625 | isis_notif_reject_adjacency( | |
626 | circuit, "Interface level mismatch", raw_pdu); | |
627 | #endif /* ifndef FABRICD */ | |
0c1bd758 | 628 | return ISIS_WARNING; |
d62a17ae | 629 | } |
f390d2c7 | 630 | } |
eb5d44eb | 631 | |
0c1bd758 CF |
632 | struct iih_info iih = { |
633 | .circuit = circuit, .ssnpa = ssnpa, .level = level}; | |
634 | ||
635 | /* Generic IIH Header */ | |
636 | iih.circ_type = stream_getc(circuit->rcv_stream) & 0x03; | |
637 | stream_get(iih.sys_id, circuit->rcv_stream, ISIS_SYS_ID_LEN); | |
638 | iih.holdtime = stream_getw(circuit->rcv_stream); | |
639 | iih.pdu_len = stream_getw(circuit->rcv_stream); | |
640 | ||
641 | if (p2p_hello) { | |
642 | iih.circuit_id = stream_getc(circuit->rcv_stream); | |
643 | } else { | |
644 | iih.priority = stream_getc(circuit->rcv_stream); | |
645 | stream_get(iih.dis, circuit->rcv_stream, ISIS_SYS_ID_LEN + 1); | |
f390d2c7 | 646 | } |
0c1bd758 | 647 | |
17c9dcd5 | 648 | if (pdu_len_validate(iih.pdu_len, circuit)) { |
d62a17ae | 649 | zlog_warn( |
0c1bd758 CF |
650 | "ISIS-Adj (%s): Rcvd %s from (%s) with invalid pdu length %" PRIu16, |
651 | circuit->area->area_tag, pdu_name, | |
652 | circuit->interface->name, iih.pdu_len); | |
c32496ee | 653 | circuit->rej_adjacencies++; |
af6911c9 EDP |
654 | #ifndef FABRICD |
655 | isis_notif_reject_adjacency(circuit, "Invalid PDU length", | |
656 | raw_pdu); | |
657 | #endif /* ifndef FABRICD */ | |
d62a17ae | 658 | return ISIS_WARNING; |
659 | } | |
3f045a08 | 660 | |
0c1bd758 | 661 | if (!p2p_hello && !(level & iih.circ_type)) { |
1a7ecb96 | 662 | flog_err(EC_ISIS_PACKET, |
1c50c1c0 QY |
663 | "Level %d LAN Hello with Circuit Type %d", level, |
664 | iih.circ_type); | |
c32496ee | 665 | circuit->rej_adjacencies++; |
af6911c9 EDP |
666 | #ifndef FABRICD |
667 | isis_notif_reject_adjacency( | |
668 | circuit, "LAN Hello with wrong IS-level", raw_pdu); | |
669 | #endif /* ifndef FABRICD */ | |
d62a17ae | 670 | return ISIS_ERROR; |
671 | } | |
3f045a08 | 672 | |
0c1bd758 CF |
673 | const char *error_log; |
674 | int retval = ISIS_WARNING; | |
d62a17ae | 675 | |
0c1bd758 CF |
676 | if (isis_unpack_tlvs(STREAM_READABLE(circuit->rcv_stream), |
677 | circuit->rcv_stream, &iih.tlvs, &error_log)) { | |
678 | zlog_warn("isis_unpack_tlvs() failed: %s", error_log); | |
c32496ee | 679 | circuit->rej_adjacencies++; |
af6911c9 EDP |
680 | #ifndef FABRICD |
681 | isis_notif_reject_adjacency(circuit, "Failed to unpack TLVs", | |
682 | raw_pdu); | |
683 | #endif /* ifndef FABRICD */ | |
d62a17ae | 684 | goto out; |
685 | } | |
eb5d44eb | 686 | |
0c1bd758 CF |
687 | if (!iih.tlvs->area_addresses.count) { |
688 | zlog_warn("No Area addresses TLV in %s", pdu_name); | |
9d92b84b EDP |
689 | #ifndef FABRICD |
690 | /* send northbound notification */ | |
691 | isis_notif_area_mismatch(circuit, raw_pdu); | |
692 | #endif /* ifndef FABRICD */ | |
d62a17ae | 693 | goto out; |
694 | } | |
f390d2c7 | 695 | |
0c1bd758 CF |
696 | if (!iih.tlvs->protocols_supported.count) { |
697 | zlog_warn("No supported protocols TLV in %s", pdu_name); | |
c32496ee | 698 | circuit->rej_adjacencies++; |
af6911c9 EDP |
699 | #ifndef FABRICD |
700 | isis_notif_reject_adjacency( | |
701 | circuit, "No supported protocols TLV", raw_pdu); | |
702 | #endif /* ifndef FABRICD */ | |
d62a17ae | 703 | goto out; |
704 | } | |
b72f345d | 705 | |
3380c990 EDP |
706 | int auth_code = isis_tlvs_auth_is_valid(iih.tlvs, &circuit->passwd, |
707 | circuit->rcv_stream, false); | |
708 | if (auth_code != ISIS_AUTH_OK) { | |
0c1bd758 CF |
709 | isis_event_auth_failure(circuit->area->area_tag, |
710 | "IIH authentication failure", | |
711 | iih.sys_id); | |
3380c990 EDP |
712 | #ifndef FABRICD |
713 | /* send northbound notification */ | |
714 | stream_get_from(raw_pdu, circuit->rcv_stream, pdu_start, | |
715 | pdu_end - pdu_start); | |
c32496ee RW |
716 | if (auth_code == ISIS_AUTH_FAILURE) { |
717 | circuit->auth_failures++; | |
3380c990 | 718 | isis_notif_authentication_failure(circuit, raw_pdu); |
c32496ee RW |
719 | } else { /* AUTH_TYPE_FAILURE or NO_VALIDATOR */ |
720 | circuit->auth_type_failures++; | |
3380c990 EDP |
721 | isis_notif_authentication_type_failure(circuit, |
722 | raw_pdu); | |
c32496ee | 723 | } |
3380c990 | 724 | #endif /* ifndef FABRICD */ |
0c1bd758 | 725 | goto out; |
d62a17ae | 726 | } |
eb5d44eb | 727 | |
0c1bd758 CF |
728 | if (!memcmp(iih.sys_id, isis->sysid, ISIS_SYS_ID_LEN)) { |
729 | zlog_warn( | |
730 | "ISIS-Adj (%s): Received IIH with own sysid - discard", | |
731 | circuit->area->area_tag); | |
c32496ee | 732 | circuit->rej_adjacencies++; |
af6911c9 EDP |
733 | #ifndef FABRICD |
734 | isis_notif_reject_adjacency( | |
735 | circuit, "Received IIH with our own sysid", raw_pdu); | |
736 | #endif /* ifndef FABRICD */ | |
0c1bd758 | 737 | goto out; |
d62a17ae | 738 | } |
19f78ceb | 739 | |
0c1bd758 CF |
740 | if (!p2p_hello |
741 | && (listcount(circuit->area->area_addrs) == 0 | |
742 | || (level == ISIS_LEVEL1 | |
743 | && !isis_tlvs_area_addresses_match( | |
744 | iih.tlvs, circuit->area->area_addrs)))) { | |
e740f9c1 | 745 | if (IS_DEBUG_ADJ_PACKETS) { |
d62a17ae | 746 | zlog_debug( |
747 | "ISIS-Adj (%s): Area mismatch, level %d IIH on %s", | |
748 | circuit->area->area_tag, level, | |
749 | circuit->interface->name); | |
750 | } | |
9d92b84b EDP |
751 | #ifndef FABRICD |
752 | /* send northbound notification */ | |
753 | isis_notif_area_mismatch(circuit, raw_pdu); | |
754 | #endif /* ifndef FABRICD */ | |
d62a17ae | 755 | goto out; |
f390d2c7 | 756 | } |
eb5d44eb | 757 | |
41415888 | 758 | iih.v4_usable = (fabricd_ip_addrs(circuit) |
0c1bd758 | 759 | && iih.tlvs->ipv4_address.count); |
d62a17ae | 760 | |
0c1bd758 CF |
761 | iih.v6_usable = (circuit->ipv6_link && listcount(circuit->ipv6_link) |
762 | && iih.tlvs->ipv6_address.count); | |
28a8cfcb | 763 | |
c9b0e434 | 764 | if (!iih.v4_usable && !iih.v6_usable) { |
e740f9c1 | 765 | if (IS_DEBUG_ADJ_PACKETS) { |
c9b0e434 CF |
766 | zlog_warn( |
767 | "ISIS-Adj (%s): Neither IPv4 nor IPv6 considered usable. Ignoring IIH", | |
768 | circuit->area->area_tag); | |
769 | } | |
c32496ee | 770 | circuit->rej_adjacencies++; |
af6911c9 EDP |
771 | #ifndef FABRICD |
772 | isis_notif_reject_adjacency( | |
773 | circuit, "Neither IPv4 not IPv6 considered usable", | |
774 | raw_pdu); | |
775 | #endif /* ifndef FABRICD */ | |
d62a17ae | 776 | goto out; |
c9b0e434 | 777 | } |
d8fba7d9 | 778 | |
0c1bd758 | 779 | retval = p2p_hello ? process_p2p_hello(&iih) : process_lan_hello(&iih); |
f390d2c7 | 780 | out: |
0c1bd758 | 781 | isis_free_tlvs(iih.tlvs); |
eb5d44eb | 782 | |
d62a17ae | 783 | return retval; |
eb5d44eb | 784 | } |
785 | ||
a6b60da9 CF |
786 | static void lsp_flood_or_update(struct isis_lsp *lsp, |
787 | struct isis_circuit *circuit, | |
788 | bool circuit_scoped) | |
789 | { | |
89cdc4df | 790 | if (!circuit_scoped) |
a6b60da9 | 791 | lsp_flood(lsp, circuit); |
89cdc4df | 792 | else |
a6b60da9 | 793 | fabricd_update_lsp_no_flood(lsp, circuit); |
a6b60da9 CF |
794 | } |
795 | ||
eb5d44eb | 796 | /* |
797 | * Process Level 1/2 Link State | |
798 | * ISO - 10589 | |
799 | * Section 7.3.15.1 - Action on receipt of a link state PDU | |
f390d2c7 | 800 | */ |
af8ac8f9 | 801 | static int process_lsp(uint8_t pdu_type, struct isis_circuit *circuit, |
9b39405f | 802 | const uint8_t *ssnpa, uint8_t max_area_addrs) |
eb5d44eb | 803 | { |
1cbd5b37 CF |
804 | int level; |
805 | bool circuit_scoped; | |
3380c990 EDP |
806 | size_t pdu_start = stream_get_getp(circuit->rcv_stream); |
807 | size_t pdu_end = stream_get_endp(circuit->rcv_stream); | |
808 | char raw_pdu[pdu_end - pdu_start]; | |
809 | ||
810 | stream_get_from(raw_pdu, circuit->rcv_stream, pdu_start, | |
811 | pdu_end - pdu_start); | |
1cbd5b37 CF |
812 | |
813 | if (pdu_type == FS_LINK_STATE) { | |
814 | if (!fabricd) | |
815 | return ISIS_ERROR; | |
816 | if (max_area_addrs != L2_CIRCUIT_FLOODING_SCOPE) | |
817 | return ISIS_ERROR; | |
818 | level = ISIS_LEVEL2; | |
819 | circuit_scoped = true; | |
820 | ||
821 | /* The stream is used verbatim for sending out new LSPDUs. | |
822 | * So make sure we store it as an L2 LSPDU internally. | |
823 | * (compare for the reverse in `send_lsp`) */ | |
824 | stream_putc_at(circuit->rcv_stream, 4, L2_LINK_STATE); | |
825 | stream_putc_at(circuit->rcv_stream, 7, 0); | |
826 | } else { | |
827 | if (pdu_type == L1_LINK_STATE) | |
828 | level = ISIS_LEVEL1; | |
829 | else | |
830 | level = ISIS_LEVEL2; | |
831 | circuit_scoped = false; | |
832 | } | |
d62a17ae | 833 | |
e740f9c1 | 834 | if (IS_DEBUG_UPDATE_PACKETS) { |
d62a17ae | 835 | zlog_debug( |
1cbd5b37 CF |
836 | "ISIS-Upd (%s): Rcvd %sL%d LSP on %s, cirType %s, cirID %u", |
837 | circuit->area->area_tag, | |
838 | circuit_scoped ? "Circuit scoped " : "", level, | |
d62a17ae | 839 | circuit->interface->name, |
840 | circuit_t2string(circuit->is_type), | |
841 | circuit->circuit_id); | |
e740f9c1 | 842 | if (IS_DEBUG_PACKET_DUMP) |
d62a17ae | 843 | zlog_dump_data(STREAM_DATA(circuit->rcv_stream), |
844 | stream_get_endp(circuit->rcv_stream)); | |
845 | } | |
f390d2c7 | 846 | |
3e300703 | 847 | struct isis_lsp_hdr hdr = {}; |
eb5d44eb | 848 | |
af8ac8f9 CF |
849 | hdr.pdu_len = stream_getw(circuit->rcv_stream); |
850 | hdr.rem_lifetime = stream_getw(circuit->rcv_stream); | |
851 | stream_get(hdr.lsp_id, circuit->rcv_stream, sizeof(hdr.lsp_id)); | |
852 | hdr.seqno = stream_getl(circuit->rcv_stream); | |
853 | hdr.checksum = stream_getw(circuit->rcv_stream); | |
854 | hdr.lsp_bits = stream_getc(circuit->rcv_stream); | |
eb5d44eb | 855 | |
8375020a EDP |
856 | #ifndef FABRICD |
857 | /* send northbound notification */ | |
858 | isis_notif_lsp_received(circuit, rawlspid_print(hdr.lsp_id), hdr.seqno, | |
859 | time(NULL), sysid_print(hdr.lsp_id)); | |
860 | #endif /* ifndef FABRICD */ | |
861 | ||
af8ac8f9 CF |
862 | if (pdu_len_validate(hdr.pdu_len, circuit)) { |
863 | zlog_debug("ISIS-Upd (%s): LSP %s invalid LSP length %" PRIu16, | |
864 | circuit->area->area_tag, rawlspid_print(hdr.lsp_id), | |
865 | hdr.pdu_len); | |
d62a17ae | 866 | return ISIS_WARNING; |
f390d2c7 | 867 | } |
d62a17ae | 868 | |
e740f9c1 | 869 | if (IS_DEBUG_UPDATE_PACKETS) { |
af8ac8f9 CF |
870 | zlog_debug("ISIS-Upd (%s): Rcvd L%d LSP %s, seq 0x%08" PRIx32 |
871 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 | |
872 | "s, len %" PRIu16 ", on %s", | |
873 | circuit->area->area_tag, level, | |
874 | rawlspid_print(hdr.lsp_id), hdr.seqno, hdr.checksum, | |
875 | hdr.rem_lifetime, hdr.pdu_len, | |
876 | circuit->interface->name); | |
f390d2c7 | 877 | } |
d62a17ae | 878 | |
879 | /* lsp is_type check */ | |
af8ac8f9 CF |
880 | if ((hdr.lsp_bits & IS_LEVEL_1) != IS_LEVEL_1) { |
881 | zlog_debug( | |
882 | "ISIS-Upd (%s): LSP %s invalid LSP is type 0x%" PRIx8, | |
883 | circuit->area->area_tag, rawlspid_print(hdr.lsp_id), | |
884 | hdr.lsp_bits & IS_LEVEL_1_AND_2); | |
d62a17ae | 885 | /* continue as per RFC1122 Be liberal in what you accept, and |
886 | * conservative in what you send */ | |
f390d2c7 | 887 | } |
d62a17ae | 888 | |
889 | /* Checksum sanity check - FIXME: move to correct place */ | |
890 | /* 12 = sysid+pdu+remtime */ | |
af8ac8f9 CF |
891 | if (iso_csum_verify(STREAM_DATA(circuit->rcv_stream) + 12, |
892 | hdr.pdu_len - 12, hdr.checksum, 12)) { | |
893 | zlog_debug( | |
894 | "ISIS-Upd (%s): LSP %s invalid LSP checksum 0x%04" PRIx16, | |
895 | circuit->area->area_tag, rawlspid_print(hdr.lsp_id), | |
896 | hdr.checksum); | |
d62a17ae | 897 | return ISIS_WARNING; |
f390d2c7 | 898 | } |
3f045a08 | 899 | |
d62a17ae | 900 | /* 7.3.15.1 a) 1 - external domain circuit will discard lsps */ |
901 | if (circuit->ext_domain) { | |
902 | zlog_debug( | |
903 | "ISIS-Upd (%s): LSP %s received at level %d over circuit with " | |
904 | "externalDomain = true", | |
af8ac8f9 | 905 | circuit->area->area_tag, rawlspid_print(hdr.lsp_id), |
d62a17ae | 906 | level); |
d62a17ae | 907 | return ISIS_WARNING; |
908 | } | |
eb5d44eb | 909 | |
d62a17ae | 910 | /* 7.3.15.1 a) 2,3 - manualL2OnlyMode not implemented */ |
af8ac8f9 | 911 | if (!(circuit->is_type & level)) { |
d62a17ae | 912 | zlog_debug( |
913 | "ISIS-Upd (%s): LSP %s received at level %d over circuit of" | |
914 | " type %s", | |
af8ac8f9 | 915 | circuit->area->area_tag, rawlspid_print(hdr.lsp_id), |
d62a17ae | 916 | level, circuit_t2string(circuit->is_type)); |
d62a17ae | 917 | return ISIS_WARNING; |
918 | } | |
0250758d | 919 | |
af8ac8f9 CF |
920 | struct isis_tlvs *tlvs = NULL; |
921 | int retval = ISIS_WARNING; | |
922 | const char *error_log; | |
923 | ||
924 | if (isis_unpack_tlvs(STREAM_READABLE(circuit->rcv_stream), | |
925 | circuit->rcv_stream, &tlvs, &error_log)) { | |
926 | zlog_warn("Something went wrong unpacking the LSP: %s", | |
927 | error_log); | |
86370604 EDP |
928 | #ifndef FABRICD |
929 | /* send northbound notification. Note that the tlv-type and | |
930 | * offset cannot correctly be set here as they are not returned | |
931 | * by isis_unpack_tlvs, but in there I cannot fire a | |
932 | * notification because I have no circuit information. So until | |
933 | * we change the code above to return those extra fields, we | |
934 | * will send dummy values which are ignored in the callback | |
935 | */ | |
936 | isis_notif_lsp_error(circuit, rawlspid_print(hdr.lsp_id), | |
937 | raw_pdu, 0, 0); | |
938 | #endif /* ifndef FABRICD */ | |
af8ac8f9 CF |
939 | goto out; |
940 | } | |
941 | ||
d62a17ae | 942 | /* 7.3.15.1 a) 4 - need to make sure IDLength matches */ |
943 | ||
944 | /* 7.3.15.1 a) 5 - maximum area match, can be ommited since we only use | |
945 | * 3 */ | |
946 | ||
947 | /* 7.3.15.1 a) 7 - password check */ | |
af8ac8f9 CF |
948 | struct isis_passwd *passwd = (level == ISIS_LEVEL1) |
949 | ? &circuit->area->area_passwd | |
950 | : &circuit->area->domain_passwd; | |
3380c990 EDP |
951 | int auth_code = isis_tlvs_auth_is_valid(tlvs, passwd, |
952 | circuit->rcv_stream, true); | |
953 | if (auth_code != ISIS_AUTH_OK) { | |
af8ac8f9 CF |
954 | isis_event_auth_failure(circuit->area->area_tag, |
955 | "LSP authentication failure", | |
956 | hdr.lsp_id); | |
3380c990 EDP |
957 | #ifndef FABRICD |
958 | /* send northbound notification */ | |
c32496ee RW |
959 | if (auth_code == ISIS_AUTH_FAILURE) { |
960 | circuit->auth_failures++; | |
3380c990 | 961 | isis_notif_authentication_failure(circuit, raw_pdu); |
c32496ee RW |
962 | } else { /* AUTH_TYPE_FAILURE or NO_VALIDATOR */ |
963 | circuit->auth_type_failures++; | |
3380c990 EDP |
964 | isis_notif_authentication_type_failure(circuit, |
965 | raw_pdu); | |
c32496ee | 966 | } |
3380c990 | 967 | #endif /* ifndef FABRICD */ |
af8ac8f9 | 968 | goto out; |
f390d2c7 | 969 | } |
af8ac8f9 | 970 | |
d62a17ae | 971 | /* Find the LSP in our database and compare it to this Link State header |
972 | */ | |
af8ac8f9 | 973 | struct isis_lsp *lsp = |
4bef0ec4 | 974 | lsp_search(&circuit->area->lspdb[level - 1], hdr.lsp_id); |
af8ac8f9 | 975 | int comp = 0; |
d62a17ae | 976 | if (lsp) |
af8ac8f9 CF |
977 | comp = lsp_compare(circuit->area->area_tag, lsp, hdr.seqno, |
978 | hdr.checksum, hdr.rem_lifetime); | |
d62a17ae | 979 | if (lsp && (lsp->own_lsp)) |
980 | goto dontcheckadj; | |
981 | ||
982 | /* 7.3.15.1 a) 6 - Must check that we have an adjacency of the same | |
983 | * level */ | |
984 | /* for broadcast circuits, snpa should be compared */ | |
985 | ||
986 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) { | |
af8ac8f9 CF |
987 | if (!isis_adj_lookup_snpa(ssnpa, |
988 | circuit->u.bc.adjdb[level - 1])) { | |
989 | zlog_debug("(%s): DS ======= LSP %s, seq 0x%08" PRIx32 | |
990 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 | |
991 | "s on %s", | |
992 | circuit->area->area_tag, | |
993 | rawlspid_print(hdr.lsp_id), hdr.seqno, | |
994 | hdr.checksum, hdr.rem_lifetime, | |
995 | circuit->interface->name); | |
996 | goto out; /* Silently discard */ | |
d62a17ae | 997 | } |
998 | } | |
999 | /* for non broadcast, we just need to find same level adj */ | |
1000 | else { | |
1001 | /* If no adj, or no sharing of level */ | |
1002 | if (!circuit->u.p2p.neighbor) { | |
af8ac8f9 CF |
1003 | retval = ISIS_OK; |
1004 | goto out; | |
d62a17ae | 1005 | } else { |
1006 | if (((level == IS_LEVEL_1) | |
1007 | && (circuit->u.p2p.neighbor->adj_usage | |
1008 | == ISIS_ADJ_LEVEL2)) | |
1009 | || ((level == IS_LEVEL_2) | |
1010 | && (circuit->u.p2p.neighbor->adj_usage | |
1011 | == ISIS_ADJ_LEVEL1))) | |
af8ac8f9 | 1012 | goto out; |
f390d2c7 | 1013 | } |
f390d2c7 | 1014 | } |
f390d2c7 | 1015 | |
af8ac8f9 CF |
1016 | bool lsp_confusion; |
1017 | ||
d62a17ae | 1018 | dontcheckadj: |
1019 | /* 7.3.15.1 a) 7 - Passwords for level 1 - not implemented */ | |
1020 | ||
1021 | /* 7.3.15.1 a) 8 - Passwords for level 2 - not implemented */ | |
1022 | ||
1023 | /* 7.3.15.1 a) 9 - OriginatingLSPBufferSize - not implemented FIXME: do | |
1024 | * it */ | |
1025 | ||
1026 | /* 7.3.16.2 - If this is an LSP from another IS with identical seq_num | |
1027 | * but | |
1028 | * wrong checksum, initiate a purge. */ | |
af8ac8f9 | 1029 | if (lsp && (lsp->hdr.seqno == hdr.seqno) |
2c92bee4 CF |
1030 | && (lsp->hdr.checksum != hdr.checksum) |
1031 | && hdr.rem_lifetime) { | |
af8ac8f9 CF |
1032 | zlog_warn("ISIS-Upd (%s): LSP %s seq 0x%08" PRIx32 |
1033 | " with confused checksum received.", | |
1034 | circuit->area->area_tag, rawlspid_print(hdr.lsp_id), | |
1035 | hdr.seqno); | |
1036 | hdr.rem_lifetime = 0; | |
1037 | lsp_confusion = true; | |
d62a17ae | 1038 | } else |
af8ac8f9 | 1039 | lsp_confusion = false; |
d62a17ae | 1040 | |
1041 | /* 7.3.15.1 b) - If the remaining life time is 0, we perform 7.3.16.4 */ | |
af8ac8f9 | 1042 | if (hdr.rem_lifetime == 0) { |
d62a17ae | 1043 | if (!lsp) { |
1044 | /* 7.3.16.4 a) 1) No LSP in db -> send an ack, but don't | |
1045 | * save */ | |
1046 | /* only needed on explicit update, eg - p2p */ | |
1047 | if (circuit->circ_type == CIRCUIT_T_P2P) | |
af8ac8f9 CF |
1048 | ack_lsp(&hdr, circuit, level); |
1049 | goto out; /* FIXME: do we need a purge? */ | |
d62a17ae | 1050 | } else { |
af8ac8f9 | 1051 | if (memcmp(hdr.lsp_id, isis->sysid, ISIS_SYS_ID_LEN)) { |
d62a17ae | 1052 | /* LSP by some other system -> do 7.3.16.4 b) */ |
1053 | /* 7.3.16.4 b) 1) */ | |
1054 | if (comp == LSP_NEWER) { | |
af8ac8f9 CF |
1055 | lsp_update(lsp, &hdr, tlvs, |
1056 | circuit->rcv_stream, | |
164066e4 CF |
1057 | circuit->area, level, |
1058 | lsp_confusion); | |
ebeae7d5 DS |
1059 | if (lsp_confusion) |
1060 | isis_free_tlvs(tlvs); | |
af8ac8f9 | 1061 | tlvs = NULL; |
d62a17ae | 1062 | /* ii */ |
a6b60da9 CF |
1063 | lsp_flood_or_update(lsp, NULL, |
1064 | circuit_scoped); | |
d62a17ae | 1065 | /* v */ |
1066 | ISIS_FLAGS_CLEAR_ALL( | |
996c9314 LB |
1067 | lsp->SSNflags); /* FIXME: |
1068 | OTHER | |
1069 | than c | |
1070 | */ | |
d62a17ae | 1071 | |
1072 | /* For the case of lsp confusion, flood | |
1073 | * the purge back to its | |
1074 | * originator so that it can react. | |
1075 | * Otherwise, don't reflood | |
1076 | * through incoming circuit as usual */ | |
1077 | if (!lsp_confusion) { | |
9b39405f CF |
1078 | isis_tx_queue_del( |
1079 | circuit->tx_queue, | |
1080 | lsp); | |
1081 | ||
d62a17ae | 1082 | /* iv */ |
1083 | if (circuit->circ_type | |
1084 | != CIRCUIT_T_BROADCAST) | |
1085 | ISIS_SET_FLAG( | |
1086 | lsp->SSNflags, | |
1087 | circuit); | |
1088 | } | |
1089 | } /* 7.3.16.4 b) 2) */ | |
1090 | else if (comp == LSP_EQUAL) { | |
1091 | /* i */ | |
9b39405f CF |
1092 | isis_tx_queue_del(circuit->tx_queue, |
1093 | lsp); | |
d62a17ae | 1094 | /* ii */ |
1095 | if (circuit->circ_type | |
1096 | != CIRCUIT_T_BROADCAST) | |
1097 | ISIS_SET_FLAG(lsp->SSNflags, | |
1098 | circuit); | |
1099 | } /* 7.3.16.4 b) 3) */ | |
1100 | else { | |
9b39405f CF |
1101 | isis_tx_queue_add(circuit->tx_queue, |
1102 | lsp, TX_LSP_NORMAL); | |
d62a17ae | 1103 | ISIS_CLEAR_FLAG(lsp->SSNflags, circuit); |
1104 | } | |
af8ac8f9 | 1105 | } else if (lsp->hdr.rem_lifetime != 0) { |
d62a17ae | 1106 | /* our own LSP -> 7.3.16.4 c) */ |
1107 | if (comp == LSP_NEWER) { | |
897989f8 EDP |
1108 | #ifndef FABRICD |
1109 | if (lsp->hdr.seqno < hdr.seqno) { | |
1110 | /* send northbound | |
1111 | * notification */ | |
1112 | isis_notif_seqno_skipped( | |
1113 | circuit, | |
1114 | rawlspid_print( | |
1115 | hdr.lsp_id)); | |
1116 | } | |
1117 | #endif /* ifndef FABRICD */ | |
af8ac8f9 | 1118 | lsp_inc_seqno(lsp, hdr.seqno); |
89cdc4df RM |
1119 | lsp_flood_or_update(lsp, NULL, |
1120 | circuit_scoped); | |
d62a17ae | 1121 | } else { |
9b39405f CF |
1122 | isis_tx_queue_add(circuit->tx_queue, |
1123 | lsp, TX_LSP_NORMAL); | |
d62a17ae | 1124 | ISIS_CLEAR_FLAG(lsp->SSNflags, circuit); |
1125 | } | |
e740f9c1 | 1126 | if (IS_DEBUG_UPDATE_PACKETS) |
d62a17ae | 1127 | zlog_debug( |
89cdc4df RM |
1128 | "ISIS-Upd (%s): (1) " |
1129 | "re-originating LSP %s new seq " | |
1130 | "0x%08" PRIx32, | |
d62a17ae | 1131 | circuit->area->area_tag, |
af8ac8f9 CF |
1132 | rawlspid_print(hdr.lsp_id), |
1133 | lsp->hdr.seqno); | |
d32f213a EDP |
1134 | } else { |
1135 | /* our own LSP with 0 remaining life time */ | |
1136 | #ifndef FABRICD | |
1137 | /* send northbound notification */ | |
1138 | isis_notif_own_lsp_purge( | |
1139 | circuit, rawlspid_print(hdr.lsp_id)); | |
1140 | #endif /* ifndef FABRICD */ | |
d62a17ae | 1141 | } |
f390d2c7 | 1142 | } |
af8ac8f9 | 1143 | goto out; |
f390d2c7 | 1144 | } |
d62a17ae | 1145 | /* 7.3.15.1 c) - If this is our own lsp and we don't have it initiate a |
1146 | * purge */ | |
af8ac8f9 | 1147 | if (memcmp(hdr.lsp_id, isis->sysid, ISIS_SYS_ID_LEN) == 0) { |
d62a17ae | 1148 | if (!lsp) { |
1149 | /* 7.3.16.4: initiate a purge */ | |
af8ac8f9 CF |
1150 | lsp_purge_non_exist(level, &hdr, circuit->area); |
1151 | retval = ISIS_OK; | |
1152 | goto out; | |
d62a17ae | 1153 | } |
1154 | /* 7.3.15.1 d) - If this is our own lsp and we have it */ | |
1155 | ||
1156 | /* In 7.3.16.1, If an Intermediate system R somewhere in the | |
1157 | * domain | |
1158 | * has information that the current sequence number for source S | |
1159 | * is | |
1160 | * "greater" than that held by S, ... */ | |
1161 | ||
562d7ef7 | 1162 | if (comp == LSP_NEWER) { |
d62a17ae | 1163 | /* 7.3.16.1 */ |
af8ac8f9 | 1164 | lsp_inc_seqno(lsp, hdr.seqno); |
897989f8 EDP |
1165 | #ifndef FABRICD |
1166 | /* send northbound notification */ | |
1167 | isis_notif_seqno_skipped(circuit, | |
1168 | rawlspid_print(hdr.lsp_id)); | |
1169 | #endif /* ifndef FABRICD */ | |
e740f9c1 | 1170 | if (IS_DEBUG_UPDATE_PACKETS) { |
d62a17ae | 1171 | zlog_debug( |
af8ac8f9 | 1172 | "ISIS-Upd (%s): (2) re-originating LSP %s new seq 0x%08" PRIx32, |
d62a17ae | 1173 | circuit->area->area_tag, |
af8ac8f9 CF |
1174 | rawlspid_print(hdr.lsp_id), |
1175 | lsp->hdr.seqno); | |
562d7ef7 CF |
1176 | } |
1177 | lsp_flood(lsp, NULL); | |
1178 | } else if (comp == LSP_EQUAL) { | |
1179 | isis_tx_queue_del(circuit->tx_queue, lsp); | |
1180 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
1181 | ISIS_SET_FLAG(lsp->SSNflags, circuit); | |
1182 | } else { | |
1183 | isis_tx_queue_add(circuit->tx_queue, lsp, | |
1184 | TX_LSP_NORMAL); | |
1185 | ISIS_CLEAR_FLAG(lsp->SSNflags, circuit); | |
d62a17ae | 1186 | } |
d62a17ae | 1187 | } else { |
1188 | /* 7.3.15.1 e) - This lsp originated on another system */ | |
1189 | ||
1190 | /* 7.3.15.1 e) 1) LSP newer than the one in db or no LSP in db | |
1191 | */ | |
1192 | if ((!lsp || comp == LSP_NEWER)) { | |
1193 | /* | |
1194 | * If this lsp is a frag, need to see if we have zero | |
1195 | * lsp present | |
1196 | */ | |
af8ac8f9 CF |
1197 | struct isis_lsp *lsp0 = NULL; |
1198 | if (LSP_FRAGMENT(hdr.lsp_id) != 0) { | |
1199 | uint8_t lspid[ISIS_SYS_ID_LEN + 2]; | |
1200 | memcpy(lspid, hdr.lsp_id, ISIS_SYS_ID_LEN + 1); | |
d62a17ae | 1201 | LSP_FRAGMENT(lspid) = 0; |
1202 | lsp0 = lsp_search( | |
4bef0ec4 | 1203 | &circuit->area->lspdb[level - 1], lspid); |
d62a17ae | 1204 | if (!lsp0) { |
1205 | zlog_debug( | |
1206 | "Got lsp frag, while zero lsp not in database"); | |
df0ba689 | 1207 | goto out; |
d62a17ae | 1208 | } |
1209 | } | |
1210 | /* i */ | |
1211 | if (!lsp) { | |
af8ac8f9 CF |
1212 | lsp = lsp_new_from_recv( |
1213 | &hdr, tlvs, circuit->rcv_stream, lsp0, | |
d62a17ae | 1214 | circuit->area, level); |
af8ac8f9 | 1215 | tlvs = NULL; |
4bef0ec4 DL |
1216 | lsp_insert(&circuit->area->lspdb[level - 1], |
1217 | lsp); | |
d62a17ae | 1218 | } else /* exists, so we overwrite */ |
1219 | { | |
af8ac8f9 | 1220 | lsp_update(lsp, &hdr, tlvs, circuit->rcv_stream, |
164066e4 | 1221 | circuit->area, level, false); |
af8ac8f9 | 1222 | tlvs = NULL; |
d62a17ae | 1223 | } |
a6b60da9 | 1224 | lsp_flood_or_update(lsp, circuit, circuit_scoped); |
d62a17ae | 1225 | |
1226 | /* iv */ | |
1227 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
1228 | ISIS_SET_FLAG(lsp->SSNflags, circuit); | |
1229 | /* FIXME: v) */ | |
1230 | } | |
1231 | /* 7.3.15.1 e) 2) LSP equal to the one in db */ | |
1232 | else if (comp == LSP_EQUAL) { | |
9b39405f | 1233 | isis_tx_queue_del(circuit->tx_queue, lsp); |
af8ac8f9 | 1234 | lsp_update(lsp, &hdr, tlvs, circuit->rcv_stream, |
164066e4 | 1235 | circuit->area, level, false); |
af8ac8f9 | 1236 | tlvs = NULL; |
d62a17ae | 1237 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) |
1238 | ISIS_SET_FLAG(lsp->SSNflags, circuit); | |
1239 | } | |
1240 | /* 7.3.15.1 e) 3) LSP older than the one in db */ | |
1241 | else { | |
9b39405f CF |
1242 | isis_tx_queue_add(circuit->tx_queue, lsp, |
1243 | TX_LSP_NORMAL); | |
d62a17ae | 1244 | ISIS_CLEAR_FLAG(lsp->SSNflags, circuit); |
1245 | } | |
f390d2c7 | 1246 | } |
af8ac8f9 CF |
1247 | |
1248 | retval = ISIS_OK; | |
1249 | ||
1250 | out: | |
e923107c | 1251 | fabricd_trigger_csnp(circuit->area, circuit_scoped); |
df0ba689 | 1252 | |
af8ac8f9 | 1253 | isis_free_tlvs(tlvs); |
d62a17ae | 1254 | return retval; |
eb5d44eb | 1255 | } |
1256 | ||
1257 | /* | |
1258 | * Process Sequence Numbers | |
1259 | * ISO - 10589 | |
1260 | * Section 7.3.15.2 - Action on receipt of a sequence numbers PDU | |
1261 | */ | |
1262 | ||
17c9dcd5 | 1263 | static int process_snp(uint8_t pdu_type, struct isis_circuit *circuit, |
d7c0a89a | 1264 | const uint8_t *ssnpa) |
eb5d44eb | 1265 | { |
3380c990 EDP |
1266 | #ifndef FABRICD |
1267 | size_t pdu_start = stream_get_getp(circuit->rcv_stream); | |
1268 | size_t pdu_end = stream_get_endp(circuit->rcv_stream); | |
1269 | char raw_pdu[pdu_end - pdu_start]; | |
1270 | #endif /* ifndef FABRICD */ | |
1271 | ||
17c9dcd5 CF |
1272 | bool is_csnp = (pdu_type == L1_COMPLETE_SEQ_NUM |
1273 | || pdu_type == L2_COMPLETE_SEQ_NUM); | |
1274 | char typechar = is_csnp ? 'C' : 'P'; | |
1275 | int level = (pdu_type == L1_COMPLETE_SEQ_NUM | |
1276 | || pdu_type == L1_PARTIAL_SEQ_NUM) | |
1277 | ? ISIS_LEVEL1 | |
1278 | : ISIS_LEVEL2; | |
1279 | ||
1280 | uint16_t pdu_len = stream_getw(circuit->rcv_stream); | |
1281 | uint8_t rem_sys_id[ISIS_SYS_ID_LEN]; | |
3380c990 | 1282 | |
17c9dcd5 CF |
1283 | stream_get(rem_sys_id, circuit->rcv_stream, ISIS_SYS_ID_LEN); |
1284 | stream_forward_getp(circuit->rcv_stream, 1); /* Circuit ID - unused */ | |
1285 | ||
3e300703 DL |
1286 | uint8_t start_lsp_id[ISIS_SYS_ID_LEN + 2] = {}; |
1287 | uint8_t stop_lsp_id[ISIS_SYS_ID_LEN + 2] = {}; | |
17c9dcd5 CF |
1288 | |
1289 | if (is_csnp) { | |
1290 | stream_get(start_lsp_id, circuit->rcv_stream, | |
1291 | ISIS_SYS_ID_LEN + 2); | |
1292 | stream_get(stop_lsp_id, circuit->rcv_stream, | |
1293 | ISIS_SYS_ID_LEN + 2); | |
1294 | } | |
1295 | ||
1296 | if (pdu_len_validate(pdu_len, circuit)) { | |
1297 | zlog_warn("Received a CSNP with bogus length %d", pdu_len); | |
1298 | return ISIS_WARNING; | |
f390d2c7 | 1299 | } |
eb5d44eb | 1300 | |
e740f9c1 | 1301 | if (IS_DEBUG_SNP_PACKETS) { |
17c9dcd5 CF |
1302 | zlog_debug( |
1303 | "ISIS-Snp (%s): Rcvd L%d %cSNP on %s, cirType %s, cirID %u", | |
1304 | circuit->area->area_tag, level, typechar, | |
1305 | circuit->interface->name, | |
1306 | circuit_t2string(circuit->is_type), | |
1307 | circuit->circuit_id); | |
e740f9c1 | 1308 | if (IS_DEBUG_PACKET_DUMP) |
17c9dcd5 CF |
1309 | zlog_dump_data(STREAM_DATA(circuit->rcv_stream), |
1310 | stream_get_endp(circuit->rcv_stream)); | |
1311 | } | |
eb5d44eb | 1312 | |
d62a17ae | 1313 | /* 7.3.15.2 a) 1 - external domain circuit will discard snp pdu */ |
1314 | if (circuit->ext_domain) { | |
f390d2c7 | 1315 | |
d62a17ae | 1316 | zlog_debug( |
1317 | "ISIS-Snp (%s): Rcvd L%d %cSNP on %s, " | |
1318 | "skipping: circuit externalDomain = true", | |
1319 | circuit->area->area_tag, level, typechar, | |
1320 | circuit->interface->name); | |
f390d2c7 | 1321 | |
d62a17ae | 1322 | return ISIS_OK; |
1323 | } | |
eb5d44eb | 1324 | |
d62a17ae | 1325 | /* 7.3.15.2 a) 2,3 - manualL2OnlyMode not implemented */ |
af8ac8f9 | 1326 | if (!(circuit->is_type & level)) { |
d62a17ae | 1327 | zlog_debug( |
1328 | "ISIS-Snp (%s): Rcvd L%d %cSNP on %s, " | |
1329 | "skipping: circuit type %s does not match level %d", | |
1330 | circuit->area->area_tag, level, typechar, | |
1331 | circuit->interface->name, | |
1332 | circuit_t2string(circuit->is_type), level); | |
eb5d44eb | 1333 | |
d62a17ae | 1334 | return ISIS_OK; |
f390d2c7 | 1335 | } |
eb5d44eb | 1336 | |
d62a17ae | 1337 | /* 7.3.15.2 a) 4 - not applicable for CSNP only PSNPs on broadcast */ |
17c9dcd5 CF |
1338 | if (!is_csnp && (circuit->circ_type == CIRCUIT_T_BROADCAST) |
1339 | && !circuit->u.bc.is_dr[level - 1]) { | |
d62a17ae | 1340 | zlog_debug( |
1341 | "ISIS-Snp (%s): Rcvd L%d %cSNP from %s on %s, " | |
1342 | "skipping: we are not the DIS", | |
1343 | circuit->area->area_tag, level, typechar, | |
1344 | snpa_print(ssnpa), circuit->interface->name); | |
1345 | ||
1346 | return ISIS_OK; | |
1347 | } | |
eb5d44eb | 1348 | |
d62a17ae | 1349 | /* 7.3.15.2 a) 5 - need to make sure IDLength matches - already checked |
1350 | */ | |
1351 | ||
1352 | /* 7.3.15.2 a) 6 - maximum area match, can be ommited since we only use | |
1353 | * 3 | |
1354 | * - already checked */ | |
1355 | ||
1356 | /* 7.3.15.2 a) 7 - Must check that we have an adjacency of the same | |
1357 | * level */ | |
1358 | /* for broadcast circuits, snpa should be compared */ | |
1359 | /* FIXME : Do we need to check SNPA? */ | |
1360 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) { | |
17c9dcd5 CF |
1361 | if (!isis_adj_lookup(rem_sys_id, |
1362 | circuit->u.bc.adjdb[level - 1])) | |
d62a17ae | 1363 | return ISIS_OK; /* Silently discard */ |
1364 | } else { | |
8e6fb83b | 1365 | if (!fabricd && !circuit->u.p2p.neighbor) { |
d62a17ae | 1366 | zlog_warn("no p2p neighbor on circuit %s", |
1367 | circuit->interface->name); | |
1368 | return ISIS_OK; /* Silently discard */ | |
1369 | } | |
1370 | } | |
eb5d44eb | 1371 | |
17c9dcd5 CF |
1372 | struct isis_tlvs *tlvs; |
1373 | int retval = ISIS_WARNING; | |
1374 | const char *error_log; | |
eb5d44eb | 1375 | |
17c9dcd5 CF |
1376 | if (isis_unpack_tlvs(STREAM_READABLE(circuit->rcv_stream), |
1377 | circuit->rcv_stream, &tlvs, &error_log)) { | |
1378 | zlog_warn("Something went wrong unpacking the SNP: %s", | |
1379 | error_log); | |
1380 | goto out; | |
f390d2c7 | 1381 | } |
eb5d44eb | 1382 | |
17c9dcd5 CF |
1383 | struct isis_passwd *passwd = (level == IS_LEVEL_1) |
1384 | ? &circuit->area->area_passwd | |
1385 | : &circuit->area->domain_passwd; | |
3380c990 EDP |
1386 | if (CHECK_FLAG(passwd->snp_auth, SNP_AUTH_RECV)) { |
1387 | int auth_code = isis_tlvs_auth_is_valid( | |
1388 | tlvs, passwd, circuit->rcv_stream, false); | |
1389 | if (auth_code != ISIS_AUTH_OK) { | |
1390 | isis_event_auth_failure(circuit->area->area_tag, | |
1391 | "SNP authentication failure", | |
1392 | rem_sys_id); | |
1393 | #ifndef FABRICD | |
1394 | /* send northbound notification */ | |
1395 | stream_get_from(raw_pdu, circuit->rcv_stream, pdu_start, | |
1396 | pdu_end - pdu_start); | |
c32496ee RW |
1397 | if (auth_code == ISIS_AUTH_FAILURE) { |
1398 | circuit->auth_failures++; | |
3380c990 EDP |
1399 | isis_notif_authentication_failure(circuit, |
1400 | raw_pdu); | |
c32496ee RW |
1401 | } else { /* AUTH_TYPE_FAILURE or NO_VALIDATOR */ |
1402 | circuit->auth_type_failures++; | |
3380c990 EDP |
1403 | isis_notif_authentication_type_failure(circuit, |
1404 | raw_pdu); | |
c32496ee | 1405 | } |
3380c990 EDP |
1406 | #endif /* ifndef FABRICD */ |
1407 | goto out; | |
1408 | } | |
d62a17ae | 1409 | } |
eb5d44eb | 1410 | |
17c9dcd5 CF |
1411 | struct isis_lsp_entry *entry_head = |
1412 | (struct isis_lsp_entry *)tlvs->lsp_entries.head; | |
1413 | ||
d62a17ae | 1414 | /* debug isis snp-packets */ |
e740f9c1 | 1415 | if (IS_DEBUG_SNP_PACKETS) { |
d62a17ae | 1416 | zlog_debug("ISIS-Snp (%s): Rcvd L%d %cSNP from %s on %s", |
1417 | circuit->area->area_tag, level, typechar, | |
1418 | snpa_print(ssnpa), circuit->interface->name); | |
17c9dcd5 CF |
1419 | for (struct isis_lsp_entry *entry = entry_head; entry; |
1420 | entry = entry->next) { | |
1421 | zlog_debug( | |
1422 | "ISIS-Snp (%s): %cSNP entry %s, seq 0x%08" PRIx32 | |
98c5bc15 | 1423 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 "s", |
17c9dcd5 CF |
1424 | circuit->area->area_tag, typechar, |
1425 | rawlspid_print(entry->id), entry->seqno, | |
1426 | entry->checksum, entry->rem_lifetime); | |
f390d2c7 | 1427 | } |
f390d2c7 | 1428 | } |
3f045a08 | 1429 | |
df0ba689 CF |
1430 | bool resync_needed = false; |
1431 | ||
d62a17ae | 1432 | /* 7.3.15.2 b) Actions on LSP_ENTRIES reported */ |
17c9dcd5 CF |
1433 | for (struct isis_lsp_entry *entry = entry_head; entry; |
1434 | entry = entry->next) { | |
1435 | struct isis_lsp *lsp = | |
4bef0ec4 | 1436 | lsp_search(&circuit->area->lspdb[level - 1], entry->id); |
17c9dcd5 CF |
1437 | bool own_lsp = !memcmp(entry->id, isis->sysid, ISIS_SYS_ID_LEN); |
1438 | if (lsp) { | |
1439 | /* 7.3.15.2 b) 1) is this LSP newer */ | |
1440 | int cmp = lsp_compare(circuit->area->area_tag, lsp, | |
1441 | entry->seqno, entry->checksum, | |
1442 | entry->rem_lifetime); | |
1443 | /* 7.3.15.2 b) 2) if it equals, clear SRM on p2p */ | |
1444 | if (cmp == LSP_EQUAL) { | |
1445 | /* if (circuit->circ_type != | |
1446 | * CIRCUIT_T_BROADCAST) */ | |
9b39405f | 1447 | isis_tx_queue_del(circuit->tx_queue, lsp); |
17c9dcd5 CF |
1448 | } |
1449 | /* 7.3.15.2 b) 3) if it is older, clear SSN and set SRM | |
1450 | */ | |
1451 | else if (cmp == LSP_OLDER) { | |
1452 | ISIS_CLEAR_FLAG(lsp->SSNflags, circuit); | |
9b39405f CF |
1453 | isis_tx_queue_add(circuit->tx_queue, lsp, |
1454 | TX_LSP_NORMAL); | |
17c9dcd5 CF |
1455 | } |
1456 | /* 7.3.15.2 b) 4) if it is newer, set SSN and clear SRM | |
1457 | on p2p */ | |
1458 | else { | |
1459 | if (own_lsp) { | |
af8ac8f9 | 1460 | lsp_inc_seqno(lsp, entry->seqno); |
9b39405f CF |
1461 | isis_tx_queue_add(circuit->tx_queue, lsp, |
1462 | TX_LSP_NORMAL); | |
17c9dcd5 CF |
1463 | } else { |
1464 | ISIS_SET_FLAG(lsp->SSNflags, circuit); | |
d62a17ae | 1465 | /* if (circuit->circ_type != |
1466 | * CIRCUIT_T_BROADCAST) */ | |
9b39405f | 1467 | isis_tx_queue_del(circuit->tx_queue, lsp); |
df0ba689 | 1468 | resync_needed = true; |
d62a17ae | 1469 | } |
17c9dcd5 CF |
1470 | } |
1471 | } else { | |
1472 | /* 7.3.15.2 b) 5) if it was not found, and all of those | |
1473 | * are not 0, | |
1474 | * insert it and set SSN on it */ | |
1475 | if (entry->rem_lifetime && entry->checksum | |
1476 | && entry->seqno && memcmp(entry->id, isis->sysid, | |
1477 | ISIS_SYS_ID_LEN)) { | |
8f5dbe18 CF |
1478 | struct isis_lsp *lsp0 = NULL; |
1479 | ||
1480 | if (LSP_FRAGMENT(entry->id)) { | |
1481 | uint8_t lspid[ISIS_SYS_ID_LEN + 2]; | |
1482 | ||
1483 | memcpy(lspid, entry->id, | |
1484 | ISIS_SYS_ID_LEN + 1); | |
1485 | LSP_FRAGMENT(lspid) = 0; | |
1486 | lsp0 = lsp_search( | |
4bef0ec4 DL |
1487 | &circuit->area->lspdb[level - 1], |
1488 | lspid); | |
8f5dbe18 | 1489 | if (!lsp0) { |
98c5bc15 | 1490 | zlog_debug("Got lsp frag in snp, while zero not in database"); |
8f5dbe18 CF |
1491 | continue; |
1492 | } | |
1493 | } | |
f7813c7c | 1494 | lsp = lsp_new(circuit->area, entry->id, |
17c9dcd5 | 1495 | entry->rem_lifetime, 0, 0, |
8f5dbe18 | 1496 | entry->checksum, lsp0, level); |
4bef0ec4 DL |
1497 | lsp_insert(&circuit->area->lspdb[level - 1], |
1498 | lsp); | |
9b39405f CF |
1499 | |
1500 | lsp_set_all_srmflags(lsp, false); | |
17c9dcd5 | 1501 | ISIS_SET_FLAG(lsp->SSNflags, circuit); |
df0ba689 | 1502 | resync_needed = true; |
d62a17ae | 1503 | } |
1504 | } | |
1505 | } | |
eb5d44eb | 1506 | |
d62a17ae | 1507 | /* 7.3.15.2 c) on CSNP set SRM for all in range which were not reported |
1508 | */ | |
17c9dcd5 | 1509 | if (is_csnp) { |
d62a17ae | 1510 | /* |
1511 | * Build a list from our own LSP db bounded with | |
1512 | * start_lsp_id and stop_lsp_id | |
1513 | */ | |
17c9dcd5 | 1514 | struct list *lsp_list = list_new(); |
4bef0ec4 DL |
1515 | lsp_build_list_nonzero_ht(&circuit->area->lspdb[level - 1], |
1516 | start_lsp_id, stop_lsp_id, lsp_list); | |
d62a17ae | 1517 | |
1518 | /* Fixme: Find a better solution */ | |
17c9dcd5 CF |
1519 | struct listnode *node, *nnode; |
1520 | struct isis_lsp *lsp; | |
1521 | for (struct isis_lsp_entry *entry = entry_head; entry; | |
1522 | entry = entry->next) { | |
1523 | for (ALL_LIST_ELEMENTS(lsp_list, node, nnode, lsp)) { | |
af8ac8f9 | 1524 | if (lsp_id_cmp(lsp->hdr.lsp_id, entry->id) |
17c9dcd5 CF |
1525 | == 0) { |
1526 | list_delete_node(lsp_list, node); | |
1527 | break; | |
d62a17ae | 1528 | } |
1529 | } | |
1530 | } | |
17c9dcd5 | 1531 | |
d62a17ae | 1532 | /* on remaining LSPs we set SRM (neighbor knew not of) */ |
9b39405f CF |
1533 | for (ALL_LIST_ELEMENTS_RO(lsp_list, node, lsp)) { |
1534 | isis_tx_queue_add(circuit->tx_queue, lsp, TX_LSP_NORMAL); | |
df0ba689 | 1535 | resync_needed = true; |
9b39405f CF |
1536 | } |
1537 | ||
d62a17ae | 1538 | /* lets free it */ |
6a154c88 | 1539 | list_delete(&lsp_list); |
d62a17ae | 1540 | } |
1541 | ||
df0ba689 | 1542 | if (fabricd_initial_sync_is_complete(circuit->area) && resync_needed) |
9165c5f5 | 1543 | zlog_warn("OpenFabric: Needed to resync LSPDB using CSNP!"); |
df0ba689 | 1544 | |
17c9dcd5 CF |
1545 | retval = ISIS_OK; |
1546 | out: | |
1547 | isis_free_tlvs(tlvs); | |
d62a17ae | 1548 | return retval; |
eb5d44eb | 1549 | } |
1550 | ||
88f9d911 CF |
1551 | static int pdu_size(uint8_t pdu_type, uint8_t *size) |
1552 | { | |
1553 | switch (pdu_type) { | |
1554 | case L1_LAN_HELLO: | |
1555 | case L2_LAN_HELLO: | |
1556 | *size = ISIS_LANHELLO_HDRLEN; | |
1557 | break; | |
1558 | case P2P_HELLO: | |
1559 | *size = ISIS_P2PHELLO_HDRLEN; | |
1560 | break; | |
1561 | case L1_LINK_STATE: | |
1562 | case L2_LINK_STATE: | |
1cbd5b37 | 1563 | case FS_LINK_STATE: |
88f9d911 CF |
1564 | *size = ISIS_LSP_HDR_LEN; |
1565 | break; | |
1566 | case L1_COMPLETE_SEQ_NUM: | |
1567 | case L2_COMPLETE_SEQ_NUM: | |
1568 | *size = ISIS_CSNP_HDRLEN; | |
1569 | break; | |
1570 | case L1_PARTIAL_SEQ_NUM: | |
1571 | case L2_PARTIAL_SEQ_NUM: | |
1572 | *size = ISIS_PSNP_HDRLEN; | |
1573 | break; | |
1574 | default: | |
1575 | return 1; | |
1576 | } | |
1577 | *size += ISIS_FIXED_HDR_LEN; | |
1578 | return 0; | |
1579 | } | |
1580 | ||
eb5d44eb | 1581 | /* |
1582 | * PDU Dispatcher | |
1583 | */ | |
1584 | ||
d7c0a89a | 1585 | int isis_handle_pdu(struct isis_circuit *circuit, uint8_t *ssnpa) |
eb5d44eb | 1586 | { |
d62a17ae | 1587 | int retval = ISIS_OK; |
2ab5a2d1 EDP |
1588 | size_t pdu_start = stream_get_getp(circuit->rcv_stream); |
1589 | size_t pdu_end = stream_get_endp(circuit->rcv_stream); | |
1590 | char raw_pdu[pdu_end - pdu_start]; | |
1591 | ||
1592 | stream_get_from(raw_pdu, circuit->rcv_stream, pdu_start, | |
1593 | pdu_end - pdu_start); | |
eb5d44eb | 1594 | |
88f9d911 CF |
1595 | /* Verify that at least the 8 bytes fixed header have been received */ |
1596 | if (stream_get_endp(circuit->rcv_stream) < ISIS_FIXED_HDR_LEN) { | |
1a7ecb96 | 1597 | flog_err(EC_ISIS_PACKET, "PDU is too short to be IS-IS."); |
88f9d911 CF |
1598 | return ISIS_ERROR; |
1599 | } | |
eb5d44eb | 1600 | |
88f9d911 CF |
1601 | uint8_t idrp = stream_getc(circuit->rcv_stream); |
1602 | uint8_t length = stream_getc(circuit->rcv_stream); | |
1603 | uint8_t version1 = stream_getc(circuit->rcv_stream); | |
1604 | uint8_t id_len = stream_getc(circuit->rcv_stream); | |
1605 | uint8_t pdu_type = stream_getc(circuit->rcv_stream) | |
1606 | & 0x1f; /* bits 6-8 are reserved */ | |
1607 | uint8_t version2 = stream_getc(circuit->rcv_stream); | |
2ab5a2d1 | 1608 | |
88f9d911 CF |
1609 | stream_forward_getp(circuit->rcv_stream, 1); /* reserved */ |
1610 | uint8_t max_area_addrs = stream_getc(circuit->rcv_stream); | |
1611 | ||
39bb53d6 CF |
1612 | pdu_counter_count(circuit->area->pdu_rx_counters, pdu_type); |
1613 | ||
88f9d911 | 1614 | if (idrp == ISO9542_ESIS) { |
450971aa | 1615 | flog_err(EC_LIB_DEVELOPMENT, |
1c50c1c0 | 1616 | "No support for ES-IS packet IDRP=%" PRIx8, idrp); |
d62a17ae | 1617 | return ISIS_ERROR; |
1618 | } | |
eb5d44eb | 1619 | |
88f9d911 | 1620 | if (idrp != ISO10589_ISIS) { |
1a7ecb96 | 1621 | flog_err(EC_ISIS_PACKET, "Not an IS-IS packet IDRP=%" PRIx8, |
1c50c1c0 | 1622 | idrp); |
d62a17ae | 1623 | return ISIS_ERROR; |
1624 | } | |
3f045a08 | 1625 | |
88f9d911 CF |
1626 | if (version1 != 1) { |
1627 | zlog_warn("Unsupported ISIS version %" PRIu8, version1); | |
0532bd84 EDP |
1628 | #ifndef FABRICD |
1629 | /* send northbound notification */ | |
1630 | isis_notif_version_skew(circuit, version1, raw_pdu); | |
1631 | #endif /* ifndef FABRICD */ | |
88f9d911 CF |
1632 | return ISIS_WARNING; |
1633 | } | |
eb5d44eb | 1634 | |
88f9d911 | 1635 | if (id_len != 0 && id_len != ISIS_SYS_ID_LEN) { |
af4c2728 | 1636 | flog_err( |
1a7ecb96 | 1637 | EC_ISIS_PACKET, |
88f9d911 CF |
1638 | "IDFieldLengthMismatch: ID Length field in a received PDU %" PRIu8 |
1639 | ", while the parameter for this IS is %u", | |
1640 | id_len, ISIS_SYS_ID_LEN); | |
c32496ee | 1641 | circuit->id_len_mismatches++; |
e98d7633 EDP |
1642 | #ifndef FABRICD |
1643 | /* send northbound notification */ | |
1644 | isis_notif_id_len_mismatch(circuit, id_len, raw_pdu); | |
1645 | #endif /* ifndef FABRICD */ | |
d62a17ae | 1646 | return ISIS_ERROR; |
1647 | } | |
eb5d44eb | 1648 | |
88f9d911 CF |
1649 | uint8_t expected_length; |
1650 | if (pdu_size(pdu_type, &expected_length)) { | |
1651 | zlog_warn("Unsupported ISIS PDU %" PRIu8, pdu_type); | |
d62a17ae | 1652 | return ISIS_WARNING; |
1653 | } | |
88f9d911 CF |
1654 | |
1655 | if (length != expected_length) { | |
1a7ecb96 | 1656 | flog_err(EC_ISIS_PACKET, |
377e2dd3 | 1657 | "Expected fixed header length = %" PRIu8 |
1c50c1c0 QY |
1658 | " but got %" PRIu8, |
1659 | expected_length, length); | |
88f9d911 CF |
1660 | return ISIS_ERROR; |
1661 | } | |
1662 | ||
1663 | if (stream_get_endp(circuit->rcv_stream) < length) { | |
af4c2728 | 1664 | flog_err( |
1a7ecb96 | 1665 | EC_ISIS_PACKET, |
88f9d911 | 1666 | "PDU is too short to contain fixed header of given PDU type."); |
d62a17ae | 1667 | return ISIS_ERROR; |
1668 | } | |
eb5d44eb | 1669 | |
88f9d911 CF |
1670 | if (version2 != 1) { |
1671 | zlog_warn("Unsupported ISIS PDU version %" PRIu8, version2); | |
0532bd84 EDP |
1672 | #ifndef FABRICD |
1673 | /* send northbound notification */ | |
1674 | isis_notif_version_skew(circuit, version2, raw_pdu); | |
1675 | #endif /* ifndef FABRICD */ | |
d62a17ae | 1676 | return ISIS_WARNING; |
1677 | } | |
3f045a08 | 1678 | |
d62a17ae | 1679 | if (circuit->is_passive) { |
1680 | zlog_warn("Received ISIS PDU on passive circuit %s", | |
1681 | circuit->interface->name); | |
1682 | return ISIS_WARNING; | |
1683 | } | |
3f045a08 | 1684 | |
d62a17ae | 1685 | /* either 3 or 0 */ |
1cbd5b37 CF |
1686 | if (pdu_type != FS_LINK_STATE /* FS PDU doesn't contain max area addr field */ |
1687 | && max_area_addrs != 0 | |
1688 | && max_area_addrs != isis->max_area_addrs) { | |
af4c2728 | 1689 | flog_err( |
1a7ecb96 | 1690 | EC_ISIS_PACKET, |
88f9d911 CF |
1691 | "maximumAreaAddressesMismatch: maximumAreaAdresses in a received PDU %" PRIu8 |
1692 | " while the parameter for this IS is %u", | |
1693 | max_area_addrs, isis->max_area_addrs); | |
c32496ee | 1694 | circuit->max_area_addr_mismatches++; |
2ab5a2d1 EDP |
1695 | #ifndef FABRICD |
1696 | /* send northbound notification */ | |
1697 | isis_notif_max_area_addr_mismatch(circuit, max_area_addrs, | |
1698 | raw_pdu); | |
1699 | #endif /* ifndef FABRICD */ | |
d62a17ae | 1700 | return ISIS_ERROR; |
1701 | } | |
eb5d44eb | 1702 | |
88f9d911 | 1703 | switch (pdu_type) { |
d62a17ae | 1704 | case L1_LAN_HELLO: |
d62a17ae | 1705 | case L2_LAN_HELLO: |
d62a17ae | 1706 | case P2P_HELLO: |
a2d41bb0 CF |
1707 | if (fabricd && pdu_type != P2P_HELLO) |
1708 | return ISIS_ERROR; | |
0c1bd758 | 1709 | retval = process_hello(pdu_type, circuit, ssnpa); |
d62a17ae | 1710 | break; |
1711 | case L1_LINK_STATE: | |
d62a17ae | 1712 | case L2_LINK_STATE: |
1cbd5b37 | 1713 | case FS_LINK_STATE: |
a2d41bb0 CF |
1714 | if (fabricd |
1715 | && pdu_type != L2_LINK_STATE | |
1716 | && pdu_type != FS_LINK_STATE) | |
1717 | return ISIS_ERROR; | |
9b39405f | 1718 | retval = process_lsp(pdu_type, circuit, ssnpa, max_area_addrs); |
d62a17ae | 1719 | break; |
1720 | case L1_COMPLETE_SEQ_NUM: | |
d62a17ae | 1721 | case L2_COMPLETE_SEQ_NUM: |
d62a17ae | 1722 | case L1_PARTIAL_SEQ_NUM: |
d62a17ae | 1723 | case L2_PARTIAL_SEQ_NUM: |
17c9dcd5 | 1724 | retval = process_snp(pdu_type, circuit, ssnpa); |
d62a17ae | 1725 | break; |
1726 | default: | |
1727 | return ISIS_ERROR; | |
1728 | } | |
eb5d44eb | 1729 | |
d62a17ae | 1730 | return retval; |
eb5d44eb | 1731 | } |
1732 | ||
d62a17ae | 1733 | int isis_receive(struct thread *thread) |
eb5d44eb | 1734 | { |
d62a17ae | 1735 | struct isis_circuit *circuit; |
d7c0a89a | 1736 | uint8_t ssnpa[ETH_ALEN]; |
d62a17ae | 1737 | int retval; |
eb5d44eb | 1738 | |
d62a17ae | 1739 | /* |
1740 | * Get the circuit | |
1741 | */ | |
1742 | circuit = THREAD_ARG(thread); | |
1743 | assert(circuit); | |
eb5d44eb | 1744 | |
d62a17ae | 1745 | circuit->t_read = NULL; |
eb5d44eb | 1746 | |
d62a17ae | 1747 | isis_circuit_stream(circuit, &circuit->rcv_stream); |
eb5d44eb | 1748 | |
d62a17ae | 1749 | retval = circuit->rx(circuit, ssnpa); |
eb5d44eb | 1750 | |
b9347997 | 1751 | #if ISIS_METHOD != ISIS_METHOD_BPF |
d62a17ae | 1752 | if (retval == ISIS_OK) |
1753 | retval = isis_handle_pdu(circuit, ssnpa); | |
b9347997 | 1754 | #endif //ISIS_METHOD != ISIS_METHOD_BPF |
eb5d44eb | 1755 | |
d62a17ae | 1756 | /* |
1757 | * prepare for next packet. | |
1758 | */ | |
1759 | if (!circuit->is_passive) | |
1760 | isis_circuit_prepare(circuit); | |
eb5d44eb | 1761 | |
d62a17ae | 1762 | return retval; |
eb5d44eb | 1763 | } |
1764 | ||
eb5d44eb | 1765 | /* |
d62a17ae | 1766 | * SEND SIDE |
eb5d44eb | 1767 | */ |
88f9d911 | 1768 | void fill_fixed_hdr(uint8_t pdu_type, struct stream *stream) |
eb5d44eb | 1769 | { |
88f9d911 CF |
1770 | uint8_t length; |
1771 | ||
1772 | if (pdu_size(pdu_type, &length)) | |
1773 | assert(!"Unknown PDU Type"); | |
1774 | ||
1775 | stream_putc(stream, ISO10589_ISIS); /* IDRP */ | |
1776 | stream_putc(stream, length); /* Length of fixed header */ | |
1777 | stream_putc(stream, 1); /* Version/Protocol ID Extension 1 */ | |
1778 | stream_putc(stream, 0); /* ID Length, 0 => 6 */ | |
1779 | stream_putc(stream, pdu_type); | |
1780 | stream_putc(stream, 1); /* Subversion */ | |
1781 | stream_putc(stream, 0); /* Reserved */ | |
1782 | stream_putc(stream, 0); /* Max Area Addresses 0 => 3 */ | |
eb5d44eb | 1783 | } |
1784 | ||
39bb53d6 | 1785 | static uint8_t hello_pdu_type(struct isis_circuit *circuit, int level) |
eb5d44eb | 1786 | { |
d62a17ae | 1787 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) |
39bb53d6 | 1788 | return (level == IS_LEVEL_1) ? L1_LAN_HELLO : L2_LAN_HELLO; |
d62a17ae | 1789 | else |
39bb53d6 CF |
1790 | return P2P_HELLO; |
1791 | } | |
1792 | ||
1793 | static void put_hello_hdr(struct isis_circuit *circuit, int level, | |
1794 | size_t *len_pointer) | |
1795 | { | |
1796 | uint8_t pdu_type = hello_pdu_type(circuit, level); | |
88f9d911 | 1797 | |
0c1bd758 | 1798 | isis_circuit_stream(circuit, &circuit->snd_stream); |
88f9d911 | 1799 | fill_fixed_hdr(pdu_type, circuit->snd_stream); |
d62a17ae | 1800 | |
0c1bd758 CF |
1801 | stream_putc(circuit->snd_stream, circuit->is_type); |
1802 | stream_put(circuit->snd_stream, circuit->area->isis->sysid, | |
1803 | ISIS_SYS_ID_LEN); | |
eb5d44eb | 1804 | |
0c1bd758 CF |
1805 | uint32_t holdtime = circuit->hello_multiplier[level - 1] |
1806 | * circuit->hello_interval[level - 1]; | |
d62a17ae | 1807 | |
0c1bd758 CF |
1808 | if (holdtime > 0xffff) |
1809 | holdtime = 0xffff; | |
d62a17ae | 1810 | |
0c1bd758 CF |
1811 | stream_putw(circuit->snd_stream, holdtime); |
1812 | *len_pointer = stream_get_endp(circuit->snd_stream); | |
1813 | stream_putw(circuit->snd_stream, 0); /* length is filled in later */ | |
d62a17ae | 1814 | |
0c1bd758 | 1815 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) { |
d7c0a89a QY |
1816 | uint8_t *desig_is = (level == IS_LEVEL_1) |
1817 | ? circuit->u.bc.l1_desig_is | |
1818 | : circuit->u.bc.l2_desig_is; | |
0c1bd758 CF |
1819 | stream_putc(circuit->snd_stream, circuit->priority[level - 1]); |
1820 | stream_put(circuit->snd_stream, desig_is, ISIS_SYS_ID_LEN + 1); | |
1821 | } else { | |
1822 | stream_putc(circuit->snd_stream, circuit->circuit_id); | |
d62a17ae | 1823 | } |
0c1bd758 | 1824 | } |
eb5d44eb | 1825 | |
0c1bd758 CF |
1826 | int send_hello(struct isis_circuit *circuit, int level) |
1827 | { | |
1828 | size_t len_pointer; | |
1829 | int retval; | |
1830 | ||
1831 | if (circuit->is_passive) | |
1832 | return ISIS_OK; | |
1833 | ||
1834 | if (circuit->interface->mtu == 0) { | |
1835 | zlog_warn("circuit has zero MTU"); | |
d62a17ae | 1836 | return ISIS_WARNING; |
0c1bd758 CF |
1837 | } |
1838 | ||
1839 | put_hello_hdr(circuit, level, &len_pointer); | |
1840 | ||
1841 | struct isis_tlvs *tlvs = isis_alloc_tlvs(); | |
1842 | ||
1843 | isis_tlvs_add_auth(tlvs, &circuit->passwd); | |
1844 | ||
a3acf37d DS |
1845 | if (!listcount(circuit->area->area_addrs)) { |
1846 | isis_free_tlvs(tlvs); | |
d62a17ae | 1847 | return ISIS_WARNING; |
a3acf37d DS |
1848 | } |
1849 | ||
0c1bd758 | 1850 | isis_tlvs_add_area_addresses(tlvs, circuit->area->area_addrs); |
d62a17ae | 1851 | |
42fe2621 | 1852 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) { |
0c1bd758 CF |
1853 | isis_tlvs_add_lan_neighbors( |
1854 | tlvs, circuit->u.bc.lan_neighs[level - 1]); | |
58e5d748 CF |
1855 | } else if (circuit->circ_type == CIRCUIT_T_P2P |
1856 | && !circuit->disable_threeway_adj) { | |
42fe2621 CF |
1857 | uint32_t ext_circuit_id = circuit->idx; |
1858 | if (circuit->u.p2p.neighbor) { | |
8e6fb83b CF |
1859 | uint8_t threeway_state; |
1860 | ||
1861 | if (fabricd_initial_sync_is_in_progress(circuit->area) | |
1862 | && fabricd_initial_sync_circuit(circuit->area) != circuit) | |
1863 | threeway_state = ISIS_THREEWAY_DOWN; | |
1864 | else | |
1865 | threeway_state = circuit->u.p2p.neighbor->threeway_state; | |
42fe2621 | 1866 | isis_tlvs_add_threeway_adj(tlvs, |
8e6fb83b | 1867 | threeway_state, |
42fe2621 CF |
1868 | ext_circuit_id, |
1869 | circuit->u.p2p.neighbor->sysid, | |
1870 | circuit->u.p2p.neighbor->ext_circuit_id); | |
1871 | } else { | |
1872 | isis_tlvs_add_threeway_adj(tlvs, | |
1873 | ISIS_THREEWAY_DOWN, | |
1874 | ext_circuit_id, | |
1875 | NULL, 0); | |
1876 | } | |
1877 | } | |
0c1bd758 CF |
1878 | |
1879 | isis_tlvs_set_protocols_supported(tlvs, &circuit->nlpids); | |
d62a17ae | 1880 | |
1881 | /* | |
1882 | * MT Supported TLV | |
1883 | * | |
1884 | * TLV gets included if no topology is enabled on the interface, | |
1885 | * if one topology other than #0 is enabled, or if multiple topologies | |
1886 | * are enabled. | |
1887 | */ | |
1888 | struct isis_circuit_mt_setting **mt_settings; | |
1889 | unsigned int mt_count; | |
1890 | ||
1891 | mt_settings = circuit_mt_settings(circuit, &mt_count); | |
0c1bd758 CF |
1892 | if (mt_count == 0 && area_is_mt(circuit->area)) { |
1893 | tlvs->mt_router_info_empty = true; | |
1894 | } else if ((mt_count == 1 | |
1895 | && mt_settings[0]->mtid != ISIS_MT_IPV4_UNICAST) | |
1896 | || (mt_count > 1)) { | |
1897 | for (unsigned int i = 0; i < mt_count; i++) | |
1898 | isis_tlvs_add_mt_router_info(tlvs, mt_settings[i]->mtid, | |
1899 | false, false); | |
d62a17ae | 1900 | } |
eb5d44eb | 1901 | |
41415888 CF |
1902 | if (circuit->ip_router) { |
1903 | struct list *circuit_ip_addrs = fabricd_ip_addrs(circuit); | |
1904 | ||
1905 | if (circuit_ip_addrs) | |
1906 | isis_tlvs_add_ipv4_addresses(tlvs, circuit_ip_addrs); | |
1907 | } | |
d62a17ae | 1908 | |
0c1bd758 CF |
1909 | if (circuit->ipv6_router && circuit->ipv6_link) |
1910 | isis_tlvs_add_ipv6_addresses(tlvs, circuit->ipv6_link); | |
d62a17ae | 1911 | |
0c1bd758 | 1912 | if (isis_pack_tlvs(tlvs, circuit->snd_stream, len_pointer, |
af8ac8f9 | 1913 | circuit->pad_hellos, false)) { |
0c1bd758 CF |
1914 | isis_free_tlvs(tlvs); |
1915 | return ISIS_WARNING; /* XXX: Maybe Log TLV structure? */ | |
f390d2c7 | 1916 | } |
d62a17ae | 1917 | |
e740f9c1 | 1918 | if (IS_DEBUG_ADJ_PACKETS) { |
d62a17ae | 1919 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) { |
1920 | zlog_debug( | |
1921 | "ISIS-Adj (%s): Sending L%d LAN IIH on %s, length %zd", | |
1922 | circuit->area->area_tag, level, | |
0c1bd758 CF |
1923 | circuit->interface->name, |
1924 | stream_get_endp(circuit->snd_stream)); | |
d62a17ae | 1925 | } else { |
1926 | zlog_debug( | |
1927 | "ISIS-Adj (%s): Sending P2P IIH on %s, length %zd", | |
1928 | circuit->area->area_tag, | |
0c1bd758 CF |
1929 | circuit->interface->name, |
1930 | stream_get_endp(circuit->snd_stream)); | |
d62a17ae | 1931 | } |
e740f9c1 | 1932 | if (IS_DEBUG_PACKET_DUMP) |
d62a17ae | 1933 | zlog_dump_data(STREAM_DATA(circuit->snd_stream), |
1934 | stream_get_endp(circuit->snd_stream)); | |
f390d2c7 | 1935 | } |
eb5d44eb | 1936 | |
0c1bd758 CF |
1937 | isis_free_tlvs(tlvs); |
1938 | ||
89cdc4df RM |
1939 | pdu_counter_count(circuit->area->pdu_tx_counters, |
1940 | hello_pdu_type(circuit, level)); | |
d62a17ae | 1941 | retval = circuit->tx(circuit, level); |
1942 | if (retval != ISIS_OK) | |
1a7ecb96 | 1943 | flog_err(EC_ISIS_PACKET, |
1c50c1c0 QY |
1944 | "ISIS-Adj (%s): Send L%d IIH on %s failed", |
1945 | circuit->area->area_tag, level, | |
1946 | circuit->interface->name); | |
eb5d44eb | 1947 | |
d62a17ae | 1948 | return retval; |
eb5d44eb | 1949 | } |
1950 | ||
a0a707ee | 1951 | static int send_hello_cb(struct thread *thread) |
eb5d44eb | 1952 | { |
7c4f7aab | 1953 | struct isis_circuit_arg *arg = THREAD_ARG(thread); |
7c4f7aab | 1954 | assert(arg); |
89cdc4df | 1955 | |
7c4f7aab CF |
1956 | struct isis_circuit *circuit = arg->circuit; |
1957 | int level = arg->level; | |
d62a17ae | 1958 | |
d62a17ae | 1959 | assert(circuit); |
ddfdbd32 | 1960 | |
7c4f7aab CF |
1961 | if (circuit->circ_type == CIRCUIT_T_P2P) { |
1962 | circuit->u.p2p.t_send_p2p_hello = NULL; | |
7c4f7aab | 1963 | send_hello(circuit, 1); |
a0a707ee CF |
1964 | send_hello_sched(circuit, ISIS_LEVEL1, |
1965 | 1000 * circuit->hello_interval[1]); | |
7c4f7aab | 1966 | return ISIS_OK; |
d62a17ae | 1967 | } |
ddfdbd32 | 1968 | |
7c4f7aab CF |
1969 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) { |
1970 | zlog_warn("ISIS-Hello (%s): Trying to send hello on unknown circuit type %d", | |
1971 | circuit->area->area_tag, circuit->circ_type); | |
1972 | return ISIS_WARNING; | |
1973 | } | |
eb5d44eb | 1974 | |
7c4f7aab CF |
1975 | circuit->u.bc.t_send_lan_hello[level - 1] = NULL; |
1976 | if (!(circuit->is_type & level)) { | |
1977 | zlog_warn("ISIS-Hello (%s): Trying to send L%d IIH in L%d-only circuit", | |
1978 | circuit->area->area_tag, level, 3 - level); | |
1979 | return ISIS_WARNING; | |
1980 | } | |
eb5d44eb | 1981 | |
7c4f7aab CF |
1982 | if (circuit->u.bc.run_dr_elect[level - 1]) |
1983 | isis_dr_elect(circuit, level); | |
eb5d44eb | 1984 | |
7c4f7aab | 1985 | int rv = send_hello(circuit, level); |
eb5d44eb | 1986 | |
d62a17ae | 1987 | /* set next timer thread */ |
a0a707ee | 1988 | send_hello_sched(circuit, level, 1000 * circuit->hello_interval[level - 1]); |
7c4f7aab | 1989 | return rv; |
eb5d44eb | 1990 | } |
1991 | ||
a0a707ee CF |
1992 | static void _send_hello_sched(struct isis_circuit *circuit, |
1993 | struct thread **threadp, | |
1994 | int level, long delay) | |
1995 | { | |
1996 | if (*threadp) { | |
1997 | if (thread_timer_remain_msec(*threadp) < (unsigned long)delay) | |
1998 | return; | |
1999 | ||
2000 | thread_cancel(*threadp); | |
2001 | } | |
2002 | ||
2003 | thread_add_timer_msec(master, send_hello_cb, | |
2004 | &circuit->level_arg[level - 1], | |
2005 | isis_jitter(delay, IIH_JITTER), | |
2006 | threadp); | |
2007 | } | |
2008 | ||
2009 | void send_hello_sched(struct isis_circuit *circuit, int level, long delay) | |
2010 | { | |
2011 | if (circuit->circ_type == CIRCUIT_T_P2P) { | |
2012 | _send_hello_sched(circuit, &circuit->u.p2p.t_send_p2p_hello, | |
2013 | ISIS_LEVEL1, delay); | |
2014 | return; | |
2015 | } | |
2016 | ||
2017 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) { | |
2018 | zlog_warn("%s: encountered unknown circuit type %d on %s", | |
2019 | __func__, circuit->circ_type, | |
2020 | circuit->interface->name); | |
2021 | return; | |
2022 | } | |
2023 | ||
2024 | for (int loop_level = ISIS_LEVEL1; loop_level <= ISIS_LEVEL2; loop_level++) { | |
2025 | if (!(loop_level & level)) | |
2026 | continue; | |
2027 | ||
2028 | _send_hello_sched( | |
2029 | circuit, | |
2030 | &circuit->u.bc.t_send_lan_hello[loop_level - 1], | |
2031 | loop_level, | |
2032 | delay | |
2033 | ); | |
2034 | } | |
2035 | } | |
2036 | ||
2037 | ||
3f045a08 JB |
2038 | /* |
2039 | * Count the maximum number of lsps that can be accomodated by a given size. | |
2040 | */ | |
af8ac8f9 | 2041 | #define LSP_ENTRIES_LEN (10 + ISIS_SYS_ID_LEN) |
d62a17ae | 2042 | static uint16_t get_max_lsp_count(uint16_t size) |
3f045a08 | 2043 | { |
d62a17ae | 2044 | uint16_t tlv_count; |
2045 | uint16_t lsp_count; | |
2046 | uint16_t remaining_size; | |
3f045a08 | 2047 | |
d62a17ae | 2048 | /* First count the full size TLVs */ |
2049 | tlv_count = size / MAX_LSP_ENTRIES_TLV_SIZE; | |
2050 | lsp_count = tlv_count * (MAX_LSP_ENTRIES_TLV_SIZE / LSP_ENTRIES_LEN); | |
3f045a08 | 2051 | |
d62a17ae | 2052 | /* The last TLV, if any */ |
2053 | remaining_size = size % MAX_LSP_ENTRIES_TLV_SIZE; | |
2054 | if (remaining_size - 2 >= LSP_ENTRIES_LEN) | |
2055 | lsp_count += (remaining_size - 2) / LSP_ENTRIES_LEN; | |
3f045a08 | 2056 | |
d62a17ae | 2057 | return lsp_count; |
3f045a08 JB |
2058 | } |
2059 | ||
17c9dcd5 | 2060 | int send_csnp(struct isis_circuit *circuit, int level) |
3f045a08 | 2061 | { |
4bef0ec4 | 2062 | if (lspdb_count(&circuit->area->lspdb[level - 1]) == 0) |
17c9dcd5 | 2063 | return ISIS_OK; |
d62a17ae | 2064 | |
39bb53d6 CF |
2065 | uint8_t pdu_type = (level == ISIS_LEVEL1) ? L1_COMPLETE_SEQ_NUM |
2066 | : L2_COMPLETE_SEQ_NUM; | |
2067 | ||
17c9dcd5 | 2068 | isis_circuit_stream(circuit, &circuit->snd_stream); |
39bb53d6 | 2069 | fill_fixed_hdr(pdu_type, circuit->snd_stream); |
3f045a08 | 2070 | |
17c9dcd5 CF |
2071 | size_t len_pointer = stream_get_endp(circuit->snd_stream); |
2072 | stream_putw(circuit->snd_stream, 0); | |
2073 | stream_put(circuit->snd_stream, isis->sysid, ISIS_SYS_ID_LEN); | |
2074 | /* with zero circuit id - ref 9.10, 9.11 */ | |
2075 | stream_putc(circuit->snd_stream, 0); | |
3f045a08 | 2076 | |
17c9dcd5 CF |
2077 | size_t start_pointer = stream_get_endp(circuit->snd_stream); |
2078 | stream_put(circuit->snd_stream, 0, ISIS_SYS_ID_LEN + 2); | |
2079 | size_t end_pointer = stream_get_endp(circuit->snd_stream); | |
2080 | stream_put(circuit->snd_stream, 0, ISIS_SYS_ID_LEN + 2); | |
d62a17ae | 2081 | |
17c9dcd5 CF |
2082 | struct isis_passwd *passwd = (level == ISIS_LEVEL1) |
2083 | ? &circuit->area->area_passwd | |
2084 | : &circuit->area->domain_passwd; | |
d62a17ae | 2085 | |
17c9dcd5 | 2086 | struct isis_tlvs *tlvs = isis_alloc_tlvs(); |
3f045a08 | 2087 | |
17c9dcd5 CF |
2088 | if (CHECK_FLAG(passwd->snp_auth, SNP_AUTH_SEND)) |
2089 | isis_tlvs_add_auth(tlvs, passwd); | |
eb5d44eb | 2090 | |
17c9dcd5 | 2091 | size_t tlv_start = stream_get_endp(circuit->snd_stream); |
af8ac8f9 CF |
2092 | if (isis_pack_tlvs(tlvs, circuit->snd_stream, len_pointer, false, |
2093 | false)) { | |
17c9dcd5 CF |
2094 | isis_free_tlvs(tlvs); |
2095 | return ISIS_WARNING; | |
2096 | } | |
2097 | isis_free_tlvs(tlvs); | |
d62a17ae | 2098 | |
17c9dcd5 CF |
2099 | uint16_t num_lsps = |
2100 | get_max_lsp_count(STREAM_WRITEABLE(circuit->snd_stream)); | |
d62a17ae | 2101 | |
17c9dcd5 | 2102 | uint8_t start[ISIS_SYS_ID_LEN + 2]; |
d62a17ae | 2103 | memset(start, 0x00, ISIS_SYS_ID_LEN + 2); |
17c9dcd5 | 2104 | uint8_t stop[ISIS_SYS_ID_LEN + 2]; |
d62a17ae | 2105 | memset(stop, 0xff, ISIS_SYS_ID_LEN + 2); |
2106 | ||
17c9dcd5 | 2107 | bool loop = true; |
d62a17ae | 2108 | while (loop) { |
17c9dcd5 CF |
2109 | tlvs = isis_alloc_tlvs(); |
2110 | if (CHECK_FLAG(passwd->snp_auth, SNP_AUTH_SEND)) | |
2111 | isis_tlvs_add_auth(tlvs, passwd); | |
2112 | ||
2113 | struct isis_lsp *last_lsp; | |
2114 | isis_tlvs_add_csnp_entries(tlvs, start, stop, num_lsps, | |
4bef0ec4 | 2115 | &circuit->area->lspdb[level - 1], |
17c9dcd5 | 2116 | &last_lsp); |
d62a17ae | 2117 | /* |
2118 | * Update the stop lsp_id before encoding this CSNP. | |
2119 | */ | |
17c9dcd5 | 2120 | if (tlvs->lsp_entries.count < num_lsps) { |
d62a17ae | 2121 | memset(stop, 0xff, ISIS_SYS_ID_LEN + 2); |
2122 | } else { | |
af8ac8f9 | 2123 | memcpy(stop, last_lsp->hdr.lsp_id, sizeof(stop)); |
d62a17ae | 2124 | } |
3f045a08 | 2125 | |
17c9dcd5 CF |
2126 | memcpy(STREAM_DATA(circuit->snd_stream) + start_pointer, start, |
2127 | ISIS_SYS_ID_LEN + 2); | |
2128 | memcpy(STREAM_DATA(circuit->snd_stream) + end_pointer, stop, | |
2129 | ISIS_SYS_ID_LEN + 2); | |
2130 | stream_set_endp(circuit->snd_stream, tlv_start); | |
2131 | if (isis_pack_tlvs(tlvs, circuit->snd_stream, len_pointer, | |
af8ac8f9 | 2132 | false, false)) { |
17c9dcd5 CF |
2133 | isis_free_tlvs(tlvs); |
2134 | return ISIS_WARNING; | |
d62a17ae | 2135 | } |
eb5d44eb | 2136 | |
e740f9c1 | 2137 | if (IS_DEBUG_SNP_PACKETS) { |
d62a17ae | 2138 | zlog_debug( |
2139 | "ISIS-Snp (%s): Sending L%d CSNP on %s, length %zd", | |
2140 | circuit->area->area_tag, level, | |
2141 | circuit->interface->name, | |
2142 | stream_get_endp(circuit->snd_stream)); | |
17c9dcd5 CF |
2143 | log_multiline(LOG_DEBUG, " ", "%s", |
2144 | isis_format_tlvs(tlvs)); | |
e740f9c1 | 2145 | if (IS_DEBUG_PACKET_DUMP) |
d62a17ae | 2146 | zlog_dump_data( |
2147 | STREAM_DATA(circuit->snd_stream), | |
2148 | stream_get_endp(circuit->snd_stream)); | |
2149 | } | |
eb5d44eb | 2150 | |
39bb53d6 | 2151 | pdu_counter_count(circuit->area->pdu_tx_counters, pdu_type); |
17c9dcd5 | 2152 | int retval = circuit->tx(circuit, level); |
d62a17ae | 2153 | if (retval != ISIS_OK) { |
1a7ecb96 | 2154 | flog_err(EC_ISIS_PACKET, |
1c50c1c0 QY |
2155 | "ISIS-Snp (%s): Send L%d CSNP on %s failed", |
2156 | circuit->area->area_tag, level, | |
2157 | circuit->interface->name); | |
17c9dcd5 | 2158 | isis_free_tlvs(tlvs); |
d62a17ae | 2159 | return retval; |
2160 | } | |
3f045a08 | 2161 | |
d62a17ae | 2162 | /* |
2163 | * Start lsp_id of the next CSNP should be one plus the | |
2164 | * stop lsp_id in this current CSNP. | |
2165 | */ | |
2166 | memcpy(start, stop, ISIS_SYS_ID_LEN + 2); | |
d8729f8c | 2167 | loop = false; |
17c9dcd5 | 2168 | for (int i = ISIS_SYS_ID_LEN + 1; i >= 0; --i) { |
d7c0a89a | 2169 | if (start[i] < (uint8_t)0xff) { |
d62a17ae | 2170 | start[i] += 1; |
d8729f8c | 2171 | loop = true; |
d62a17ae | 2172 | break; |
2173 | } | |
2174 | } | |
2175 | memset(stop, 0xff, ISIS_SYS_ID_LEN + 2); | |
17c9dcd5 | 2176 | isis_free_tlvs(tlvs); |
d62a17ae | 2177 | } |
3f045a08 | 2178 | |
17c9dcd5 | 2179 | return ISIS_OK; |
eb5d44eb | 2180 | } |
2181 | ||
d62a17ae | 2182 | int send_l1_csnp(struct thread *thread) |
eb5d44eb | 2183 | { |
d62a17ae | 2184 | struct isis_circuit *circuit; |
eb5d44eb | 2185 | |
d62a17ae | 2186 | circuit = THREAD_ARG(thread); |
2187 | assert(circuit); | |
eb5d44eb | 2188 | |
d62a17ae | 2189 | circuit->t_send_csnp[0] = NULL; |
eb5d44eb | 2190 | |
8e6fb83b CF |
2191 | if ((circuit->circ_type == CIRCUIT_T_BROADCAST |
2192 | && circuit->u.bc.is_dr[0]) | |
2193 | || circuit->circ_type == CIRCUIT_T_P2P) { | |
d62a17ae | 2194 | send_csnp(circuit, 1); |
2195 | } | |
2196 | /* set next timer thread */ | |
2197 | thread_add_timer(master, send_l1_csnp, circuit, | |
2198 | isis_jitter(circuit->csnp_interval[0], CSNP_JITTER), | |
2199 | &circuit->t_send_csnp[0]); | |
eb5d44eb | 2200 | |
9f2d0354 | 2201 | return ISIS_OK; |
eb5d44eb | 2202 | } |
2203 | ||
d62a17ae | 2204 | int send_l2_csnp(struct thread *thread) |
eb5d44eb | 2205 | { |
d62a17ae | 2206 | struct isis_circuit *circuit; |
eb5d44eb | 2207 | |
d62a17ae | 2208 | circuit = THREAD_ARG(thread); |
2209 | assert(circuit); | |
eb5d44eb | 2210 | |
d62a17ae | 2211 | circuit->t_send_csnp[1] = NULL; |
eb5d44eb | 2212 | |
8e6fb83b CF |
2213 | if ((circuit->circ_type == CIRCUIT_T_BROADCAST |
2214 | && circuit->u.bc.is_dr[1]) | |
2215 | || circuit->circ_type == CIRCUIT_T_P2P) { | |
d62a17ae | 2216 | send_csnp(circuit, 2); |
2217 | } | |
2218 | /* set next timer thread */ | |
2219 | thread_add_timer(master, send_l2_csnp, circuit, | |
2220 | isis_jitter(circuit->csnp_interval[1], CSNP_JITTER), | |
2221 | &circuit->t_send_csnp[1]); | |
d70f99e1 | 2222 | |
9f2d0354 | 2223 | return ISIS_OK; |
eb5d44eb | 2224 | } |
2225 | ||
eb5d44eb | 2226 | /* |
2227 | * 7.3.15.4 action on expiration of partial SNP interval | |
2228 | * level 1 | |
2229 | */ | |
d62a17ae | 2230 | static int send_psnp(int level, struct isis_circuit *circuit) |
eb5d44eb | 2231 | { |
d62a17ae | 2232 | if (circuit->circ_type == CIRCUIT_T_BROADCAST |
2233 | && circuit->u.bc.is_dr[level - 1]) | |
2234 | return ISIS_OK; | |
eb5d44eb | 2235 | |
4bef0ec4 | 2236 | if (lspdb_count(&circuit->area->lspdb[level - 1]) == 0) |
d62a17ae | 2237 | return ISIS_OK; |
f390d2c7 | 2238 | |
d62a17ae | 2239 | if (!circuit->snd_stream) |
2240 | return ISIS_ERROR; | |
e38e0df0 | 2241 | |
39bb53d6 CF |
2242 | uint8_t pdu_type = (level == ISIS_LEVEL1) ? L1_PARTIAL_SEQ_NUM |
2243 | : L2_PARTIAL_SEQ_NUM; | |
2244 | ||
17c9dcd5 | 2245 | isis_circuit_stream(circuit, &circuit->snd_stream); |
39bb53d6 | 2246 | fill_fixed_hdr(pdu_type, circuit->snd_stream); |
17c9dcd5 CF |
2247 | |
2248 | size_t len_pointer = stream_get_endp(circuit->snd_stream); | |
2249 | stream_putw(circuit->snd_stream, 0); /* length is filled in later */ | |
2250 | stream_put(circuit->snd_stream, isis->sysid, ISIS_SYS_ID_LEN); | |
2251 | stream_putc(circuit->snd_stream, circuit->idx); | |
2252 | ||
2253 | struct isis_passwd *passwd = (level == ISIS_LEVEL1) | |
2254 | ? &circuit->area->area_passwd | |
2255 | : &circuit->area->domain_passwd; | |
2256 | ||
2257 | struct isis_tlvs *tlvs = isis_alloc_tlvs(); | |
2258 | ||
2259 | if (CHECK_FLAG(passwd->snp_auth, SNP_AUTH_SEND)) | |
2260 | isis_tlvs_add_auth(tlvs, passwd); | |
2261 | ||
2262 | size_t tlv_start = stream_get_endp(circuit->snd_stream); | |
af8ac8f9 CF |
2263 | if (isis_pack_tlvs(tlvs, circuit->snd_stream, len_pointer, false, |
2264 | false)) { | |
17c9dcd5 CF |
2265 | isis_free_tlvs(tlvs); |
2266 | return ISIS_WARNING; | |
2267 | } | |
2268 | isis_free_tlvs(tlvs); | |
2269 | ||
2270 | uint16_t num_lsps = | |
2271 | get_max_lsp_count(STREAM_WRITEABLE(circuit->snd_stream)); | |
f390d2c7 | 2272 | |
d62a17ae | 2273 | while (1) { |
4bef0ec4 DL |
2274 | struct isis_lsp *lsp; |
2275 | ||
17c9dcd5 CF |
2276 | tlvs = isis_alloc_tlvs(); |
2277 | if (CHECK_FLAG(passwd->snp_auth, SNP_AUTH_SEND)) | |
2278 | isis_tlvs_add_auth(tlvs, passwd); | |
2279 | ||
81fddbe7 | 2280 | frr_each (lspdb, &circuit->area->lspdb[level - 1], lsp) { |
17c9dcd5 CF |
2281 | if (ISIS_CHECK_FLAG(lsp->SSNflags, circuit)) |
2282 | isis_tlvs_add_lsp_entry(tlvs, lsp); | |
eb5d44eb | 2283 | |
17c9dcd5 CF |
2284 | if (tlvs->lsp_entries.count == num_lsps) |
2285 | break; | |
2286 | } | |
2287 | ||
2288 | if (!tlvs->lsp_entries.count) { | |
2289 | isis_free_tlvs(tlvs); | |
d62a17ae | 2290 | return ISIS_OK; |
2291 | } | |
2292 | ||
17c9dcd5 CF |
2293 | stream_set_endp(circuit->snd_stream, tlv_start); |
2294 | if (isis_pack_tlvs(tlvs, circuit->snd_stream, len_pointer, | |
af8ac8f9 | 2295 | false, false)) { |
17c9dcd5 CF |
2296 | isis_free_tlvs(tlvs); |
2297 | return ISIS_WARNING; | |
d62a17ae | 2298 | } |
2299 | ||
e740f9c1 | 2300 | if (IS_DEBUG_SNP_PACKETS) { |
d62a17ae | 2301 | zlog_debug( |
2302 | "ISIS-Snp (%s): Sending L%d PSNP on %s, length %zd", | |
2303 | circuit->area->area_tag, level, | |
2304 | circuit->interface->name, | |
2305 | stream_get_endp(circuit->snd_stream)); | |
17c9dcd5 CF |
2306 | log_multiline(LOG_DEBUG, " ", "%s", |
2307 | isis_format_tlvs(tlvs)); | |
e740f9c1 | 2308 | if (IS_DEBUG_PACKET_DUMP) |
d62a17ae | 2309 | zlog_dump_data( |
2310 | STREAM_DATA(circuit->snd_stream), | |
2311 | stream_get_endp(circuit->snd_stream)); | |
2312 | } | |
2313 | ||
39bb53d6 | 2314 | pdu_counter_count(circuit->area->pdu_tx_counters, pdu_type); |
17c9dcd5 | 2315 | int retval = circuit->tx(circuit, level); |
d62a17ae | 2316 | if (retval != ISIS_OK) { |
1a7ecb96 | 2317 | flog_err(EC_ISIS_PACKET, |
1c50c1c0 QY |
2318 | "ISIS-Snp (%s): Send L%d PSNP on %s failed", |
2319 | circuit->area->area_tag, level, | |
2320 | circuit->interface->name); | |
17c9dcd5 | 2321 | isis_free_tlvs(tlvs); |
d62a17ae | 2322 | return retval; |
2323 | } | |
2324 | ||
2325 | /* | |
2326 | * sending succeeded, we can clear SSN flags of this circuit | |
2327 | * for the LSPs in list | |
2328 | */ | |
17c9dcd5 CF |
2329 | struct isis_lsp_entry *entry_head; |
2330 | entry_head = (struct isis_lsp_entry *)tlvs->lsp_entries.head; | |
2331 | for (struct isis_lsp_entry *entry = entry_head; entry; | |
2332 | entry = entry->next) | |
2333 | ISIS_CLEAR_FLAG(entry->lsp->SSNflags, circuit); | |
2334 | isis_free_tlvs(tlvs); | |
d62a17ae | 2335 | } |
2336 | ||
17c9dcd5 | 2337 | return ISIS_OK; |
eb5d44eb | 2338 | } |
2339 | ||
d62a17ae | 2340 | int send_l1_psnp(struct thread *thread) |
eb5d44eb | 2341 | { |
2342 | ||
d62a17ae | 2343 | struct isis_circuit *circuit; |
eb5d44eb | 2344 | |
d62a17ae | 2345 | circuit = THREAD_ARG(thread); |
2346 | assert(circuit); | |
eb5d44eb | 2347 | |
d62a17ae | 2348 | circuit->t_send_psnp[0] = NULL; |
eb5d44eb | 2349 | |
d62a17ae | 2350 | send_psnp(1, circuit); |
2351 | /* set next timer thread */ | |
2352 | thread_add_timer(master, send_l1_psnp, circuit, | |
2353 | isis_jitter(circuit->psnp_interval[0], PSNP_JITTER), | |
2354 | &circuit->t_send_psnp[0]); | |
eb5d44eb | 2355 | |
9f2d0354 | 2356 | return ISIS_OK; |
eb5d44eb | 2357 | } |
2358 | ||
2359 | /* | |
2360 | * 7.3.15.4 action on expiration of partial SNP interval | |
2361 | * level 2 | |
2362 | */ | |
d62a17ae | 2363 | int send_l2_psnp(struct thread *thread) |
eb5d44eb | 2364 | { |
d62a17ae | 2365 | struct isis_circuit *circuit; |
eb5d44eb | 2366 | |
d62a17ae | 2367 | circuit = THREAD_ARG(thread); |
2368 | assert(circuit); | |
eb5d44eb | 2369 | |
d62a17ae | 2370 | circuit->t_send_psnp[1] = NULL; |
eb5d44eb | 2371 | |
d62a17ae | 2372 | send_psnp(2, circuit); |
eb5d44eb | 2373 | |
d62a17ae | 2374 | /* set next timer thread */ |
2375 | thread_add_timer(master, send_l2_psnp, circuit, | |
2376 | isis_jitter(circuit->psnp_interval[1], PSNP_JITTER), | |
2377 | &circuit->t_send_psnp[1]); | |
eb5d44eb | 2378 | |
9f2d0354 | 2379 | return ISIS_OK; |
eb5d44eb | 2380 | } |
2381 | ||
eb5d44eb | 2382 | /* |
2383 | * ISO 10589 - 7.3.14.3 | |
2384 | */ | |
161fa356 CF |
2385 | void send_lsp(struct isis_circuit *circuit, struct isis_lsp *lsp, |
2386 | enum isis_tx_type tx_type) | |
eb5d44eb | 2387 | { |
d62a17ae | 2388 | int clear_srm = 1; |
2389 | int retval = ISIS_OK; | |
2390 | ||
d62a17ae | 2391 | if (circuit->state != C_STATE_UP || circuit->is_passive == 1) |
2392 | goto out; | |
2393 | ||
2394 | /* | |
2395 | * Do not send if levels do not match | |
2396 | */ | |
2397 | if (!(lsp->level & circuit->is_type)) | |
2398 | goto out; | |
2399 | ||
2400 | /* | |
2401 | * Do not send if we do not have adjacencies in state up on the circuit | |
2402 | */ | |
2403 | if (circuit->upadjcount[lsp->level - 1] == 0) | |
2404 | goto out; | |
2405 | ||
2406 | /* stream_copy will assert and stop program execution if LSP is larger | |
2407 | * than | |
2408 | * the circuit's MTU. So handle and log this case here. */ | |
2409 | if (stream_get_endp(lsp->pdu) > stream_get_size(circuit->snd_stream)) { | |
af4c2728 | 2410 | flog_err( |
1a7ecb96 | 2411 | EC_ISIS_PACKET, |
af8ac8f9 CF |
2412 | "ISIS-Upd (%s): Can't send L%d LSP %s, seq 0x%08" PRIx32 |
2413 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 | |
2414 | "s on %s. LSP Size is %zu while interface stream size is %zu.", | |
d62a17ae | 2415 | circuit->area->area_tag, lsp->level, |
af8ac8f9 CF |
2416 | rawlspid_print(lsp->hdr.lsp_id), lsp->hdr.seqno, |
2417 | lsp->hdr.checksum, lsp->hdr.rem_lifetime, | |
d62a17ae | 2418 | circuit->interface->name, stream_get_endp(lsp->pdu), |
2419 | stream_get_size(circuit->snd_stream)); | |
56e22fb6 EDP |
2420 | #ifndef FABRICD |
2421 | /* send a northbound notification */ | |
2422 | isis_notif_lsp_too_large(circuit, stream_get_endp(lsp->pdu), | |
2423 | rawlspid_print(lsp->hdr.lsp_id)); | |
2424 | #endif /* ifndef FABRICD */ | |
e740f9c1 | 2425 | if (IS_DEBUG_PACKET_DUMP) |
d62a17ae | 2426 | zlog_dump_data(STREAM_DATA(lsp->pdu), |
2427 | stream_get_endp(lsp->pdu)); | |
2428 | retval = ISIS_ERROR; | |
2429 | goto out; | |
2430 | } | |
eb5d44eb | 2431 | |
d62a17ae | 2432 | /* copy our lsp to the send buffer */ |
2433 | stream_copy(circuit->snd_stream, lsp->pdu); | |
2434 | ||
1cbd5b37 CF |
2435 | if (tx_type == TX_LSP_CIRCUIT_SCOPED) { |
2436 | stream_putc_at(circuit->snd_stream, 4, FS_LINK_STATE); | |
89cdc4df RM |
2437 | stream_putc_at(circuit->snd_stream, 7, |
2438 | L2_CIRCUIT_FLOODING_SCOPE); | |
1cbd5b37 CF |
2439 | } |
2440 | ||
e740f9c1 | 2441 | if (IS_DEBUG_UPDATE_PACKETS) { |
161fa356 | 2442 | zlog_debug("ISIS-Upd (%s): Sending %sL%d LSP %s, seq 0x%08" PRIx32 |
af8ac8f9 CF |
2443 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 |
2444 | "s on %s", | |
161fa356 CF |
2445 | circuit->area->area_tag, |
2446 | (tx_type == TX_LSP_CIRCUIT_SCOPED) | |
2447 | ? "Circuit scoped " : "", | |
2448 | lsp->level, | |
af8ac8f9 CF |
2449 | rawlspid_print(lsp->hdr.lsp_id), lsp->hdr.seqno, |
2450 | lsp->hdr.checksum, lsp->hdr.rem_lifetime, | |
2451 | circuit->interface->name); | |
e740f9c1 | 2452 | if (IS_DEBUG_PACKET_DUMP) |
d62a17ae | 2453 | zlog_dump_data(STREAM_DATA(circuit->snd_stream), |
2454 | stream_get_endp(circuit->snd_stream)); | |
2455 | } | |
3f045a08 | 2456 | |
39bb53d6 CF |
2457 | uint8_t pdu_type = (tx_type == TX_LSP_CIRCUIT_SCOPED) ? FS_LINK_STATE |
2458 | : (lsp->level == ISIS_LEVEL1) ? L1_LINK_STATE | |
2459 | : L2_LINK_STATE; | |
2460 | ||
d62a17ae | 2461 | clear_srm = 0; |
39bb53d6 | 2462 | pdu_counter_count(circuit->area->pdu_tx_counters, pdu_type); |
d62a17ae | 2463 | retval = circuit->tx(circuit, lsp->level); |
2464 | if (retval != ISIS_OK) { | |
1a7ecb96 | 2465 | flog_err(EC_ISIS_PACKET, |
1c50c1c0 QY |
2466 | "ISIS-Upd (%s): Send L%d LSP on %s failed %s", |
2467 | circuit->area->area_tag, lsp->level, | |
2468 | circuit->interface->name, | |
2469 | (retval == ISIS_WARNING) ? "temporarily" | |
2470 | : "permanently"); | |
d62a17ae | 2471 | } |
f390d2c7 | 2472 | |
cfd1f27b | 2473 | out: |
d62a17ae | 2474 | if (clear_srm |
2475 | || (retval == ISIS_OK && circuit->circ_type == CIRCUIT_T_BROADCAST) | |
2476 | || (retval != ISIS_OK && retval != ISIS_WARNING)) { | |
2477 | /* SRM flag will trigger retransmission. We will not retransmit | |
2478 | * if we | |
2479 | * encountered a fatal error. | |
2480 | * On success, they should only be cleared if it's a broadcast | |
2481 | * circuit. | |
2482 | * On a P2P circuit, we will wait for the ack from the neighbor | |
2483 | * to clear | |
2484 | * the fag. | |
2485 | */ | |
9b39405f | 2486 | isis_tx_queue_del(circuit->tx_queue, lsp); |
d62a17ae | 2487 | } |
f390d2c7 | 2488 | } |