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Commit | Line | Data |
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eb5d44eb | 1 | /* |
d62a17ae | 2 | * IS-IS Rout(e)ing protocol - isis_pdu.c |
eb5d44eb | 3 | * PDU processing |
4 | * | |
5 | * Copyright (C) 2001,2002 Sampo Saaristo | |
d62a17ae | 6 | * Tampere University of Technology |
eb5d44eb | 7 | * Institute of Communications Engineering |
8 | * | |
d62a17ae | 9 | * This program is free software; you can redistribute it and/or modify it |
10 | * under the terms of the GNU General Public Licenseas published by the Free | |
11 | * Software Foundation; either version 2 of the License, or (at your option) | |
eb5d44eb | 12 | * any later version. |
13 | * | |
d62a17ae | 14 | * This program is distributed in the hope that it will be useful,but WITHOUT |
15 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
16 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
eb5d44eb | 17 | * more details. |
896014f4 DL |
18 | * |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; see the file COPYING; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
eb5d44eb | 22 | */ |
23 | ||
eb5d44eb | 24 | #include <zebra.h> |
eb5d44eb | 25 | |
26 | #include "memory.h" | |
27 | #include "thread.h" | |
28 | #include "linklist.h" | |
29 | #include "log.h" | |
30 | #include "stream.h" | |
31 | #include "vty.h" | |
3f045a08 | 32 | #include "hash.h" |
eb5d44eb | 33 | #include "prefix.h" |
34 | #include "if.h" | |
6a270cd9 | 35 | #include "checksum.h" |
3f045a08 | 36 | #include "md5.h" |
38937bd5 | 37 | #include "lib_errors.h" |
eb5d44eb | 38 | |
39 | #include "isisd/dict.h" | |
eb5d44eb | 40 | #include "isisd/isis_constants.h" |
41 | #include "isisd/isis_common.h" | |
3f045a08 | 42 | #include "isisd/isis_flags.h" |
eb5d44eb | 43 | #include "isisd/isis_adjacency.h" |
44 | #include "isisd/isis_circuit.h" | |
45 | #include "isisd/isis_network.h" | |
46 | #include "isisd/isis_misc.h" | |
47 | #include "isisd/isis_dr.h" | |
eb5d44eb | 48 | #include "isisd/isisd.h" |
49 | #include "isisd/isis_dynhn.h" | |
50 | #include "isisd/isis_lsp.h" | |
51 | #include "isisd/isis_pdu.h" | |
52 | #include "isisd/iso_checksum.h" | |
53 | #include "isisd/isis_csm.h" | |
54 | #include "isisd/isis_events.h" | |
f8c06e2c | 55 | #include "isisd/isis_te.h" |
99894f9a | 56 | #include "isisd/isis_mt.h" |
841791b6 | 57 | #include "isisd/isis_tlvs.h" |
54ece698 | 58 | #include "isisd/isis_errors.h" |
8e6fb83b | 59 | #include "isisd/fabricd.h" |
9b39405f | 60 | #include "isisd/isis_tx_queue.h" |
39bb53d6 | 61 | #include "isisd/isis_pdu_counter.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) { | |
133 | if (isis->debugs & DEBUG_ADJ_PACKETS) { | |
134 | zlog_debug("ISIS-Adj (%s): Rcvd P2P IIH from (%s) with invalid three-way state: %d\n", | |
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 | ||
146 | if (isis->debugs & DEBUG_ADJ_PACKETS) { | |
147 | zlog_debug("ISIS-Adj (%s): Rcvd P2P IIH from (%s) which lists IS/Circuit different from us as neighbor.\n", | |
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"); | |
167 | isis_adj_state_change(adj, ISIS_ADJ_DOWN, | |
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; |
d62a17ae | 187 | isis_adj_state_change(adj, ISIS_ADJ_INITIALIZING, NULL); |
188 | adj->sys_type = ISIS_SYSTYPE_UNKNOWN; | |
f390d2c7 | 189 | } |
eb5d44eb | 190 | |
42fe2621 CF |
191 | if (tw_adj && adj->threeway_state == ISIS_THREEWAY_DOWN) |
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 | |
203 | /* Update MPLS TE Remote IP address parameter if possible */ | |
0c1bd758 CF |
204 | if (IS_MPLS_TE(isisMplsTE) && iih->circuit->mtc |
205 | && IS_CIRCUIT_TE(iih->circuit->mtc) && adj->ipv4_address_count) | |
206 | set_circuitparams_rmt_ipaddr(iih->circuit->mtc, | |
207 | adj->ipv4_addresses[0]); | |
d62a17ae | 208 | |
209 | /* lets take care of the expiry */ | |
210 | THREAD_TIMER_OFF(adj->t_expire); | |
211 | thread_add_timer(master, isis_adj_expire, adj, (long)adj->hold_time, | |
212 | &adj->t_expire); | |
213 | ||
8e6fb83b CF |
214 | /* While fabricds initial sync is in progress, ignore hellos from other |
215 | * interfaces than the one we are performing the initial sync on. */ | |
216 | if (fabricd_initial_sync_is_in_progress(iih->circuit->area) | |
217 | && fabricd_initial_sync_circuit(iih->circuit->area) != iih->circuit) | |
218 | return ISIS_OK; | |
219 | ||
d62a17ae | 220 | /* 8.2.5.2 a) a match was detected */ |
0c1bd758 CF |
221 | if (isis_tlvs_area_addresses_match(iih->tlvs, |
222 | iih->circuit->area->area_addrs)) { | |
d62a17ae | 223 | /* 8.2.5.2 a) 2) If the system is L1 - table 5 */ |
0c1bd758 CF |
224 | if (iih->circuit->area->is_type == IS_LEVEL_1) { |
225 | switch (iih->circ_type) { | |
d62a17ae | 226 | case IS_LEVEL_1: |
227 | case IS_LEVEL_1_AND_2: | |
42fe2621 CF |
228 | if (adj->adj_state != ISIS_ADJ_UP |
229 | || adj->adj_usage == ISIS_ADJ_LEVEL1) { | |
230 | isis_adj_process_threeway(adj, tw_adj, | |
231 | ISIS_ADJ_LEVEL1); | |
d62a17ae | 232 | } |
233 | break; | |
234 | case IS_LEVEL_2: | |
235 | if (adj->adj_state != ISIS_ADJ_UP) { | |
236 | /* (7) reject - wrong system type event | |
237 | */ | |
238 | zlog_warn("wrongSystemType"); | |
0c1bd758 | 239 | return ISIS_WARNING; |
d62a17ae | 240 | } else if (adj->adj_usage == ISIS_ADJ_LEVEL1) { |
241 | /* (6) down - wrong system */ | |
242 | isis_adj_state_change(adj, | |
243 | ISIS_ADJ_DOWN, | |
244 | "Wrong System"); | |
245 | } | |
246 | break; | |
247 | } | |
f390d2c7 | 248 | } |
d62a17ae | 249 | |
250 | /* 8.2.5.2 a) 3) If the system is L1L2 - table 6 */ | |
0c1bd758 CF |
251 | if (iih->circuit->area->is_type == IS_LEVEL_1_AND_2) { |
252 | switch (iih->circ_type) { | |
d62a17ae | 253 | case IS_LEVEL_1: |
42fe2621 CF |
254 | if (adj->adj_state != ISIS_ADJ_UP |
255 | || adj->adj_usage == ISIS_ADJ_LEVEL1) { | |
256 | isis_adj_process_threeway(adj, tw_adj, | |
257 | ISIS_ADJ_LEVEL1); | |
d62a17ae | 258 | } else if ((adj->adj_usage |
259 | == ISIS_ADJ_LEVEL1AND2) | |
260 | || (adj->adj_usage | |
261 | == ISIS_ADJ_LEVEL2)) { | |
262 | /* (8) down - wrong system */ | |
263 | isis_adj_state_change(adj, | |
264 | ISIS_ADJ_DOWN, | |
265 | "Wrong System"); | |
266 | } | |
267 | break; | |
268 | case IS_LEVEL_2: | |
42fe2621 CF |
269 | if (adj->adj_state != ISIS_ADJ_UP |
270 | || adj->adj_usage == ISIS_ADJ_LEVEL2) { | |
271 | isis_adj_process_threeway(adj, tw_adj, | |
272 | ISIS_ADJ_LEVEL2); | |
d62a17ae | 273 | } else if ((adj->adj_usage == ISIS_ADJ_LEVEL1) |
274 | || (adj->adj_usage | |
275 | == ISIS_ADJ_LEVEL1AND2)) { | |
276 | /* (8) down - wrong system */ | |
277 | isis_adj_state_change(adj, | |
278 | ISIS_ADJ_DOWN, | |
279 | "Wrong System"); | |
d62a17ae | 280 | } |
281 | break; | |
282 | case IS_LEVEL_1_AND_2: | |
42fe2621 CF |
283 | if (adj->adj_state != ISIS_ADJ_UP |
284 | || adj->adj_usage == ISIS_ADJ_LEVEL1AND2) { | |
285 | isis_adj_process_threeway(adj, tw_adj, | |
286 | ISIS_ADJ_LEVEL1AND2); | |
d62a17ae | 287 | } else if ((adj->adj_usage == ISIS_ADJ_LEVEL1) |
288 | || (adj->adj_usage | |
289 | == ISIS_ADJ_LEVEL2)) { | |
290 | /* (8) down - wrong system */ | |
291 | isis_adj_state_change(adj, | |
292 | ISIS_ADJ_DOWN, | |
293 | "Wrong System"); | |
d62a17ae | 294 | } |
295 | break; | |
296 | } | |
f390d2c7 | 297 | } |
d62a17ae | 298 | |
299 | /* 8.2.5.2 a) 4) If the system is L2 - table 7 */ | |
0c1bd758 CF |
300 | if (iih->circuit->area->is_type == IS_LEVEL_2) { |
301 | switch (iih->circ_type) { | |
d62a17ae | 302 | case IS_LEVEL_1: |
303 | if (adj->adj_state != ISIS_ADJ_UP) { | |
304 | /* (5) reject - wrong system type event | |
305 | */ | |
306 | zlog_warn("wrongSystemType"); | |
0c1bd758 | 307 | return ISIS_WARNING; |
d62a17ae | 308 | } else if ((adj->adj_usage |
309 | == ISIS_ADJ_LEVEL1AND2) | |
310 | || (adj->adj_usage | |
311 | == ISIS_ADJ_LEVEL2)) { | |
312 | /* (6) down - wrong system */ | |
313 | isis_adj_state_change(adj, | |
314 | ISIS_ADJ_DOWN, | |
315 | "Wrong System"); | |
316 | } | |
317 | break; | |
318 | case IS_LEVEL_1_AND_2: | |
319 | case IS_LEVEL_2: | |
42fe2621 CF |
320 | if (adj->adj_state != ISIS_ADJ_UP |
321 | || adj->adj_usage == ISIS_ADJ_LEVEL2) { | |
322 | isis_adj_process_threeway(adj, tw_adj, | |
323 | ISIS_ADJ_LEVEL2); | |
d62a17ae | 324 | } else if (adj->adj_usage |
325 | == ISIS_ADJ_LEVEL1AND2) { | |
326 | /* (6) down - wrong system */ | |
327 | isis_adj_state_change(adj, | |
328 | ISIS_ADJ_DOWN, | |
329 | "Wrong System"); | |
d62a17ae | 330 | } |
331 | break; | |
332 | } | |
f390d2c7 | 333 | } |
d62a17ae | 334 | } |
335 | /* 8.2.5.2 b) if no match was detected */ | |
0c1bd758 CF |
336 | else if (listcount(iih->circuit->area->area_addrs) > 0) { |
337 | if (iih->circuit->area->is_type == IS_LEVEL_1) { | |
d62a17ae | 338 | /* 8.2.5.2 b) 1) is_type L1 and adj is not up */ |
339 | if (adj->adj_state != ISIS_ADJ_UP) { | |
340 | isis_adj_state_change(adj, ISIS_ADJ_DOWN, | |
341 | "Area Mismatch"); | |
342 | /* 8.2.5.2 b) 2)is_type L1 and adj is up */ | |
343 | } else { | |
344 | isis_adj_state_change(adj, ISIS_ADJ_DOWN, | |
345 | "Down - Area Mismatch"); | |
346 | } | |
f390d2c7 | 347 | } |
d62a17ae | 348 | /* 8.2.5.2 b 3 If the system is L2 or L1L2 - table 8 */ |
349 | else { | |
0c1bd758 | 350 | switch (iih->circ_type) { |
d62a17ae | 351 | case IS_LEVEL_1: |
352 | if (adj->adj_state != ISIS_ADJ_UP) { | |
353 | /* (6) reject - Area Mismatch event */ | |
354 | zlog_warn("AreaMismatch"); | |
0c1bd758 | 355 | return ISIS_WARNING; |
d62a17ae | 356 | } else if (adj->adj_usage == ISIS_ADJ_LEVEL1) { |
357 | /* (7) down - area mismatch */ | |
358 | isis_adj_state_change(adj, | |
359 | ISIS_ADJ_DOWN, | |
360 | "Area Mismatch"); | |
361 | ||
362 | } else if ((adj->adj_usage | |
363 | == ISIS_ADJ_LEVEL1AND2) | |
364 | || (adj->adj_usage | |
365 | == ISIS_ADJ_LEVEL2)) { | |
366 | /* (7) down - wrong system */ | |
367 | isis_adj_state_change(adj, | |
368 | ISIS_ADJ_DOWN, | |
369 | "Wrong System"); | |
370 | } | |
371 | break; | |
372 | case IS_LEVEL_1_AND_2: | |
373 | case IS_LEVEL_2: | |
42fe2621 CF |
374 | if (adj->adj_state != ISIS_ADJ_UP |
375 | || adj->adj_usage == ISIS_ADJ_LEVEL2) { | |
376 | isis_adj_process_threeway(adj, tw_adj, | |
377 | ISIS_ADJ_LEVEL2); | |
d62a17ae | 378 | } else if (adj->adj_usage == ISIS_ADJ_LEVEL1) { |
379 | /* (7) down - wrong system */ | |
380 | isis_adj_state_change(adj, | |
381 | ISIS_ADJ_DOWN, | |
382 | "Wrong System"); | |
383 | } else if (adj->adj_usage | |
384 | == ISIS_ADJ_LEVEL1AND2) { | |
0c1bd758 | 385 | if (iih->circ_type == IS_LEVEL_2) { |
d62a17ae | 386 | /* (7) down - wrong system */ |
387 | isis_adj_state_change( | |
388 | adj, ISIS_ADJ_DOWN, | |
389 | "Wrong System"); | |
390 | } else { | |
391 | /* (7) down - area mismatch */ | |
392 | isis_adj_state_change( | |
393 | adj, ISIS_ADJ_DOWN, | |
394 | "Area Mismatch"); | |
395 | } | |
d62a17ae | 396 | } |
397 | break; | |
398 | } | |
f390d2c7 | 399 | } |
d62a17ae | 400 | } else { |
401 | /* down - area mismatch */ | |
402 | isis_adj_state_change(adj, ISIS_ADJ_DOWN, "Area Mismatch"); | |
f390d2c7 | 403 | } |
d8fba7d9 | 404 | |
0c1bd758 | 405 | if (adj->adj_state == ISIS_ADJ_UP && changed) { |
d62a17ae | 406 | lsp_regenerate_schedule(adj->circuit->area, |
407 | isis_adj_usage2levels(adj->adj_usage), | |
408 | 0); | |
409 | } | |
eb5d44eb | 410 | |
d62a17ae | 411 | /* 8.2.5.2 c) if the action was up - comparing circuit IDs */ |
412 | /* FIXME - Missing parts */ | |
413 | ||
414 | /* some of my own understanding of the ISO, why the heck does | |
415 | * it not say what should I change the system_type to... | |
416 | */ | |
417 | switch (adj->adj_usage) { | |
418 | case ISIS_ADJ_LEVEL1: | |
419 | adj->sys_type = ISIS_SYSTYPE_L1_IS; | |
420 | break; | |
421 | case ISIS_ADJ_LEVEL2: | |
422 | adj->sys_type = ISIS_SYSTYPE_L2_IS; | |
423 | break; | |
424 | case ISIS_ADJ_LEVEL1AND2: | |
425 | adj->sys_type = ISIS_SYSTYPE_L2_IS; | |
426 | break; | |
427 | case ISIS_ADJ_NONE: | |
428 | adj->sys_type = ISIS_SYSTYPE_UNKNOWN; | |
429 | break; | |
430 | } | |
eb5d44eb | 431 | |
d62a17ae | 432 | if (isis->debugs & DEBUG_ADJ_PACKETS) { |
433 | zlog_debug( | |
434 | "ISIS-Adj (%s): Rcvd P2P IIH from (%s), cir type %s," | |
c59f88c8 | 435 | " cir id %hhu, length %" PRIu16, |
0c1bd758 CF |
436 | iih->circuit->area->area_tag, |
437 | iih->circuit->interface->name, | |
438 | circuit_t2string(iih->circuit->is_type), | |
439 | iih->circuit->circuit_id, iih->pdu_len); | |
d62a17ae | 440 | } |
eb5d44eb | 441 | |
0c1bd758 | 442 | return ISIS_OK; |
eb5d44eb | 443 | } |
444 | ||
0c1bd758 | 445 | static int process_lan_hello(struct iih_info *iih) |
eb5d44eb | 446 | { |
d62a17ae | 447 | struct isis_adjacency *adj; |
0c1bd758 CF |
448 | adj = isis_adj_lookup(iih->sys_id, |
449 | iih->circuit->u.bc.adjdb[iih->level - 1]); | |
450 | if ((adj == NULL) || (memcmp(adj->snpa, iih->ssnpa, ETH_ALEN)) | |
451 | || (adj->level != iih->level)) { | |
452 | if (!adj) { | |
453 | /* Do as in 8.4.2.5 */ | |
454 | adj = isis_new_adj(iih->sys_id, iih->ssnpa, iih->level, | |
455 | iih->circuit); | |
456 | } else { | |
457 | if (iih->ssnpa) { | |
458 | memcpy(adj->snpa, iih->ssnpa, 6); | |
459 | } else { | |
460 | memset(adj->snpa, ' ', 6); | |
461 | } | |
462 | adj->level = iih->level; | |
463 | } | |
464 | isis_adj_state_change(adj, ISIS_ADJ_INITIALIZING, NULL); | |
d62a17ae | 465 | |
0c1bd758 CF |
466 | if (iih->level == IS_LEVEL_1) |
467 | adj->sys_type = ISIS_SYSTYPE_L1_IS; | |
468 | else | |
469 | adj->sys_type = ISIS_SYSTYPE_L2_IS; | |
470 | list_delete_all_node( | |
471 | iih->circuit->u.bc.lan_neighs[iih->level - 1]); | |
472 | isis_adj_build_neigh_list( | |
473 | iih->circuit->u.bc.adjdb[iih->level - 1], | |
474 | iih->circuit->u.bc.lan_neighs[iih->level - 1]); | |
475 | } | |
476 | ||
477 | if (adj->dis_record[iih->level - 1].dis == ISIS_IS_DIS) { | |
d7c0a89a QY |
478 | uint8_t *dis = (iih->level == 1) |
479 | ? iih->circuit->u.bc.l1_desig_is | |
480 | : iih->circuit->u.bc.l2_desig_is; | |
0c1bd758 CF |
481 | |
482 | if (memcmp(dis, iih->dis, ISIS_SYS_ID_LEN + 1)) { | |
483 | thread_add_event(master, isis_event_dis_status_change, | |
484 | iih->circuit, 0, NULL); | |
485 | memcpy(dis, iih->dis, ISIS_SYS_ID_LEN + 1); | |
486 | } | |
d62a17ae | 487 | } |
3f045a08 | 488 | |
0c1bd758 CF |
489 | adj->circuit_t = iih->circ_type; |
490 | adj->hold_time = iih->holdtime; | |
491 | adj->last_upd = time(NULL); | |
492 | adj->prio[iih->level - 1] = iih->priority; | |
493 | memcpy(adj->lanid, iih->dis, ISIS_SYS_ID_LEN + 1); | |
3f045a08 | 494 | |
0c1bd758 CF |
495 | bool changed; |
496 | isis_tlvs_to_adj(iih->tlvs, adj, &changed); | |
497 | changed |= tlvs_to_adj_mt_set(iih->tlvs, iih->v4_usable, iih->v6_usable, | |
498 | adj); | |
499 | ||
500 | /* lets take care of the expiry */ | |
501 | THREAD_TIMER_OFF(adj->t_expire); | |
502 | thread_add_timer(master, isis_adj_expire, adj, (long)adj->hold_time, | |
503 | &adj->t_expire); | |
504 | ||
505 | /* | |
506 | * If the snpa for this circuit is found from LAN Neighbours TLV | |
507 | * we have two-way communication -> adjacency can be put to state "up" | |
508 | */ | |
509 | bool own_snpa_found = | |
510 | isis_tlvs_own_snpa_found(iih->tlvs, iih->circuit->u.bc.snpa); | |
511 | ||
512 | if (adj->adj_state != ISIS_ADJ_UP) { | |
513 | if (own_snpa_found) { | |
514 | isis_adj_state_change( | |
515 | adj, ISIS_ADJ_UP, | |
516 | "own SNPA found in LAN Neighbours TLV"); | |
517 | } | |
518 | } else { | |
519 | if (!own_snpa_found) { | |
520 | isis_adj_state_change( | |
521 | adj, ISIS_ADJ_INITIALIZING, | |
522 | "own SNPA not found in LAN Neighbours TLV"); | |
523 | } | |
d62a17ae | 524 | } |
eb5d44eb | 525 | |
0c1bd758 CF |
526 | if (adj->adj_state == ISIS_ADJ_UP && changed) |
527 | lsp_regenerate_schedule(adj->circuit->area, iih->level, 0); | |
528 | ||
529 | if (isis->debugs & DEBUG_ADJ_PACKETS) { | |
d62a17ae | 530 | zlog_debug( |
0c1bd758 CF |
531 | "ISIS-Adj (%s): Rcvd L%d LAN IIH from %s on %s, cirType %s, cirID %u, length %zd", |
532 | iih->circuit->area->area_tag, iih->level, | |
533 | snpa_print(iih->ssnpa), iih->circuit->interface->name, | |
534 | circuit_t2string(iih->circuit->is_type), | |
535 | iih->circuit->circuit_id, | |
536 | stream_get_endp(iih->circuit->rcv_stream)); | |
d62a17ae | 537 | } |
0c1bd758 CF |
538 | return ISIS_OK; |
539 | } | |
eb5d44eb | 540 | |
17c9dcd5 CF |
541 | static int pdu_len_validate(uint16_t pdu_len, struct isis_circuit *circuit) |
542 | { | |
543 | if (pdu_len < stream_get_getp(circuit->rcv_stream) | |
544 | || pdu_len > ISO_MTU(circuit) | |
545 | || pdu_len > stream_get_endp(circuit->rcv_stream)) | |
546 | return 1; | |
547 | ||
548 | if (pdu_len < stream_get_endp(circuit->rcv_stream)) | |
549 | stream_set_endp(circuit->rcv_stream, pdu_len); | |
550 | return 0; | |
551 | } | |
552 | ||
0c1bd758 | 553 | static int process_hello(uint8_t pdu_type, struct isis_circuit *circuit, |
d7c0a89a | 554 | uint8_t *ssnpa) |
0c1bd758 | 555 | { |
3380c990 EDP |
556 | /* keep a copy of the raw pdu for NB notifications */ |
557 | size_t pdu_start = stream_get_getp(circuit->rcv_stream); | |
558 | size_t pdu_end = stream_get_endp(circuit->rcv_stream); | |
559 | char raw_pdu[pdu_end - pdu_start]; | |
0c1bd758 CF |
560 | bool p2p_hello = (pdu_type == P2P_HELLO); |
561 | int level = p2p_hello ? 0 | |
562 | : (pdu_type == L1_LAN_HELLO) ? ISIS_LEVEL1 | |
563 | : ISIS_LEVEL2; | |
564 | const char *pdu_name = | |
565 | p2p_hello | |
566 | ? "P2P IIH" | |
567 | : (level == ISIS_LEVEL1) ? "L1 LAN IIH" : "L2 LAN IIH"; | |
568 | ||
3380c990 EDP |
569 | |
570 | stream_get_from(raw_pdu, circuit->rcv_stream, pdu_start, | |
571 | pdu_end - pdu_start); | |
0c1bd758 CF |
572 | if (isis->debugs & DEBUG_ADJ_PACKETS) { |
573 | zlog_debug("ISIS-Adj (%s): Rcvd %s on %s, cirType %s, cirID %u", | |
574 | circuit->area->area_tag, pdu_name, | |
575 | circuit->interface->name, | |
576 | circuit_t2string(circuit->is_type), | |
577 | circuit->circuit_id); | |
578 | if (isis->debugs & DEBUG_PACKET_DUMP) | |
579 | zlog_dump_data(STREAM_DATA(circuit->rcv_stream), | |
580 | stream_get_endp(circuit->rcv_stream)); | |
581 | } | |
582 | ||
583 | if (p2p_hello) { | |
584 | if (circuit->circ_type != CIRCUIT_T_P2P) { | |
585 | zlog_warn("p2p hello on non p2p circuit"); | |
af6911c9 EDP |
586 | #ifndef FABRICD |
587 | isis_notif_reject_adjacency( | |
588 | circuit, "p2p hello on non p2p circuit", | |
589 | raw_pdu); | |
590 | #endif /* ifndef FABRICD */ | |
0c1bd758 CF |
591 | return ISIS_WARNING; |
592 | } | |
593 | } else { | |
594 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) { | |
595 | zlog_warn("lan hello on non broadcast circuit"); | |
af6911c9 EDP |
596 | #ifndef FABRICD |
597 | isis_notif_reject_adjacency( | |
598 | circuit, "lan hello on non broadcast circuit", | |
599 | raw_pdu); | |
600 | #endif /* ifndef FABRICD */ | |
0c1bd758 CF |
601 | return ISIS_WARNING; |
602 | } | |
603 | ||
604 | if (circuit->ext_domain) { | |
d62a17ae | 605 | zlog_debug( |
0c1bd758 CF |
606 | "level %d LAN Hello received over circuit with externalDomain = true", |
607 | level); | |
af6911c9 EDP |
608 | #ifndef FABRICD |
609 | isis_notif_reject_adjacency( | |
610 | circuit, | |
611 | "LAN Hello received over circuit with externalDomain = true", | |
612 | raw_pdu); | |
613 | #endif /* ifndef FABRICD */ | |
0c1bd758 CF |
614 | return ISIS_WARNING; |
615 | } | |
616 | ||
af8ac8f9 | 617 | if (!(circuit->is_type & level)) { |
0c1bd758 CF |
618 | if (isis->debugs & DEBUG_ADJ_PACKETS) { |
619 | zlog_debug( | |
620 | "ISIS-Adj (%s): Interface level mismatch, %s", | |
621 | circuit->area->area_tag, | |
622 | circuit->interface->name); | |
623 | } | |
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); | |
af6911c9 EDP |
653 | #ifndef FABRICD |
654 | isis_notif_reject_adjacency(circuit, "Invalid PDU length", | |
655 | raw_pdu); | |
656 | #endif /* ifndef FABRICD */ | |
d62a17ae | 657 | return ISIS_WARNING; |
658 | } | |
3f045a08 | 659 | |
0c1bd758 | 660 | if (!p2p_hello && !(level & iih.circ_type)) { |
1a7ecb96 | 661 | flog_err(EC_ISIS_PACKET, |
1c50c1c0 QY |
662 | "Level %d LAN Hello with Circuit Type %d", level, |
663 | iih.circ_type); | |
af6911c9 EDP |
664 | #ifndef FABRICD |
665 | isis_notif_reject_adjacency( | |
666 | circuit, "LAN Hello with wrong IS-level", raw_pdu); | |
667 | #endif /* ifndef FABRICD */ | |
d62a17ae | 668 | return ISIS_ERROR; |
669 | } | |
3f045a08 | 670 | |
0c1bd758 CF |
671 | const char *error_log; |
672 | int retval = ISIS_WARNING; | |
d62a17ae | 673 | |
0c1bd758 CF |
674 | if (isis_unpack_tlvs(STREAM_READABLE(circuit->rcv_stream), |
675 | circuit->rcv_stream, &iih.tlvs, &error_log)) { | |
676 | zlog_warn("isis_unpack_tlvs() failed: %s", error_log); | |
af6911c9 EDP |
677 | #ifndef FABRICD |
678 | isis_notif_reject_adjacency(circuit, "Failed to unpack TLVs", | |
679 | raw_pdu); | |
680 | #endif /* ifndef FABRICD */ | |
d62a17ae | 681 | goto out; |
682 | } | |
eb5d44eb | 683 | |
0c1bd758 CF |
684 | if (!iih.tlvs->area_addresses.count) { |
685 | zlog_warn("No Area addresses TLV in %s", pdu_name); | |
9d92b84b EDP |
686 | #ifndef FABRICD |
687 | /* send northbound notification */ | |
688 | isis_notif_area_mismatch(circuit, raw_pdu); | |
689 | #endif /* ifndef FABRICD */ | |
d62a17ae | 690 | goto out; |
691 | } | |
f390d2c7 | 692 | |
0c1bd758 CF |
693 | if (!iih.tlvs->protocols_supported.count) { |
694 | zlog_warn("No supported protocols TLV in %s", pdu_name); | |
af6911c9 EDP |
695 | #ifndef FABRICD |
696 | isis_notif_reject_adjacency( | |
697 | circuit, "No supported protocols TLV", raw_pdu); | |
698 | #endif /* ifndef FABRICD */ | |
d62a17ae | 699 | goto out; |
700 | } | |
b72f345d | 701 | |
3380c990 EDP |
702 | int auth_code = isis_tlvs_auth_is_valid(iih.tlvs, &circuit->passwd, |
703 | circuit->rcv_stream, false); | |
704 | if (auth_code != ISIS_AUTH_OK) { | |
0c1bd758 CF |
705 | isis_event_auth_failure(circuit->area->area_tag, |
706 | "IIH authentication failure", | |
707 | iih.sys_id); | |
3380c990 EDP |
708 | #ifndef FABRICD |
709 | /* send northbound notification */ | |
710 | stream_get_from(raw_pdu, circuit->rcv_stream, pdu_start, | |
711 | pdu_end - pdu_start); | |
712 | if (auth_code == ISIS_AUTH_FAILURE) | |
713 | isis_notif_authentication_failure(circuit, raw_pdu); | |
714 | else /* AUTH_TYPE_FAILURE or NO_VALIDATOR */ | |
715 | isis_notif_authentication_type_failure(circuit, | |
716 | raw_pdu); | |
717 | #endif /* ifndef FABRICD */ | |
0c1bd758 | 718 | goto out; |
d62a17ae | 719 | } |
eb5d44eb | 720 | |
0c1bd758 CF |
721 | if (!memcmp(iih.sys_id, isis->sysid, ISIS_SYS_ID_LEN)) { |
722 | zlog_warn( | |
723 | "ISIS-Adj (%s): Received IIH with own sysid - discard", | |
724 | circuit->area->area_tag); | |
af6911c9 EDP |
725 | #ifndef FABRICD |
726 | isis_notif_reject_adjacency( | |
727 | circuit, "Received IIH with our own sysid", raw_pdu); | |
728 | #endif /* ifndef FABRICD */ | |
0c1bd758 | 729 | goto out; |
d62a17ae | 730 | } |
19f78ceb | 731 | |
0c1bd758 CF |
732 | if (!p2p_hello |
733 | && (listcount(circuit->area->area_addrs) == 0 | |
734 | || (level == ISIS_LEVEL1 | |
735 | && !isis_tlvs_area_addresses_match( | |
736 | iih.tlvs, circuit->area->area_addrs)))) { | |
d62a17ae | 737 | if (isis->debugs & DEBUG_ADJ_PACKETS) { |
738 | zlog_debug( | |
739 | "ISIS-Adj (%s): Area mismatch, level %d IIH on %s", | |
740 | circuit->area->area_tag, level, | |
741 | circuit->interface->name); | |
742 | } | |
9d92b84b EDP |
743 | #ifndef FABRICD |
744 | /* send northbound notification */ | |
745 | isis_notif_area_mismatch(circuit, raw_pdu); | |
746 | #endif /* ifndef FABRICD */ | |
d62a17ae | 747 | goto out; |
f390d2c7 | 748 | } |
eb5d44eb | 749 | |
41415888 | 750 | iih.v4_usable = (fabricd_ip_addrs(circuit) |
0c1bd758 | 751 | && iih.tlvs->ipv4_address.count); |
d62a17ae | 752 | |
0c1bd758 CF |
753 | iih.v6_usable = (circuit->ipv6_link && listcount(circuit->ipv6_link) |
754 | && iih.tlvs->ipv6_address.count); | |
28a8cfcb | 755 | |
c9b0e434 CF |
756 | if (!iih.v4_usable && !iih.v6_usable) { |
757 | if (isis->debugs & DEBUG_ADJ_PACKETS) { | |
758 | zlog_warn( | |
759 | "ISIS-Adj (%s): Neither IPv4 nor IPv6 considered usable. Ignoring IIH", | |
760 | circuit->area->area_tag); | |
761 | } | |
af6911c9 EDP |
762 | #ifndef FABRICD |
763 | isis_notif_reject_adjacency( | |
764 | circuit, "Neither IPv4 not IPv6 considered usable", | |
765 | raw_pdu); | |
766 | #endif /* ifndef FABRICD */ | |
d62a17ae | 767 | goto out; |
c9b0e434 | 768 | } |
d8fba7d9 | 769 | |
0c1bd758 | 770 | retval = p2p_hello ? process_p2p_hello(&iih) : process_lan_hello(&iih); |
f390d2c7 | 771 | out: |
0c1bd758 | 772 | isis_free_tlvs(iih.tlvs); |
eb5d44eb | 773 | |
d62a17ae | 774 | return retval; |
eb5d44eb | 775 | } |
776 | ||
a6b60da9 CF |
777 | static void lsp_flood_or_update(struct isis_lsp *lsp, |
778 | struct isis_circuit *circuit, | |
779 | bool circuit_scoped) | |
780 | { | |
89cdc4df | 781 | if (!circuit_scoped) |
a6b60da9 | 782 | lsp_flood(lsp, circuit); |
89cdc4df | 783 | else |
a6b60da9 | 784 | fabricd_update_lsp_no_flood(lsp, circuit); |
a6b60da9 CF |
785 | } |
786 | ||
eb5d44eb | 787 | /* |
788 | * Process Level 1/2 Link State | |
789 | * ISO - 10589 | |
790 | * Section 7.3.15.1 - Action on receipt of a link state PDU | |
f390d2c7 | 791 | */ |
af8ac8f9 | 792 | static int process_lsp(uint8_t pdu_type, struct isis_circuit *circuit, |
9b39405f | 793 | const uint8_t *ssnpa, uint8_t max_area_addrs) |
eb5d44eb | 794 | { |
1cbd5b37 CF |
795 | int level; |
796 | bool circuit_scoped; | |
3380c990 EDP |
797 | size_t pdu_start = stream_get_getp(circuit->rcv_stream); |
798 | size_t pdu_end = stream_get_endp(circuit->rcv_stream); | |
799 | char raw_pdu[pdu_end - pdu_start]; | |
800 | ||
801 | stream_get_from(raw_pdu, circuit->rcv_stream, pdu_start, | |
802 | pdu_end - pdu_start); | |
1cbd5b37 CF |
803 | |
804 | if (pdu_type == FS_LINK_STATE) { | |
805 | if (!fabricd) | |
806 | return ISIS_ERROR; | |
807 | if (max_area_addrs != L2_CIRCUIT_FLOODING_SCOPE) | |
808 | return ISIS_ERROR; | |
809 | level = ISIS_LEVEL2; | |
810 | circuit_scoped = true; | |
811 | ||
812 | /* The stream is used verbatim for sending out new LSPDUs. | |
813 | * So make sure we store it as an L2 LSPDU internally. | |
814 | * (compare for the reverse in `send_lsp`) */ | |
815 | stream_putc_at(circuit->rcv_stream, 4, L2_LINK_STATE); | |
816 | stream_putc_at(circuit->rcv_stream, 7, 0); | |
817 | } else { | |
818 | if (pdu_type == L1_LINK_STATE) | |
819 | level = ISIS_LEVEL1; | |
820 | else | |
821 | level = ISIS_LEVEL2; | |
822 | circuit_scoped = false; | |
823 | } | |
d62a17ae | 824 | |
825 | if (isis->debugs & DEBUG_UPDATE_PACKETS) { | |
826 | zlog_debug( | |
1cbd5b37 CF |
827 | "ISIS-Upd (%s): Rcvd %sL%d LSP on %s, cirType %s, cirID %u", |
828 | circuit->area->area_tag, | |
829 | circuit_scoped ? "Circuit scoped " : "", level, | |
d62a17ae | 830 | circuit->interface->name, |
831 | circuit_t2string(circuit->is_type), | |
832 | circuit->circuit_id); | |
833 | if (isis->debugs & DEBUG_PACKET_DUMP) | |
834 | zlog_dump_data(STREAM_DATA(circuit->rcv_stream), | |
835 | stream_get_endp(circuit->rcv_stream)); | |
836 | } | |
f390d2c7 | 837 | |
3e300703 | 838 | struct isis_lsp_hdr hdr = {}; |
eb5d44eb | 839 | |
af8ac8f9 CF |
840 | hdr.pdu_len = stream_getw(circuit->rcv_stream); |
841 | hdr.rem_lifetime = stream_getw(circuit->rcv_stream); | |
842 | stream_get(hdr.lsp_id, circuit->rcv_stream, sizeof(hdr.lsp_id)); | |
843 | hdr.seqno = stream_getl(circuit->rcv_stream); | |
844 | hdr.checksum = stream_getw(circuit->rcv_stream); | |
845 | hdr.lsp_bits = stream_getc(circuit->rcv_stream); | |
eb5d44eb | 846 | |
8375020a EDP |
847 | #ifndef FABRICD |
848 | /* send northbound notification */ | |
849 | isis_notif_lsp_received(circuit, rawlspid_print(hdr.lsp_id), hdr.seqno, | |
850 | time(NULL), sysid_print(hdr.lsp_id)); | |
851 | #endif /* ifndef FABRICD */ | |
852 | ||
af8ac8f9 CF |
853 | if (pdu_len_validate(hdr.pdu_len, circuit)) { |
854 | zlog_debug("ISIS-Upd (%s): LSP %s invalid LSP length %" PRIu16, | |
855 | circuit->area->area_tag, rawlspid_print(hdr.lsp_id), | |
856 | hdr.pdu_len); | |
d62a17ae | 857 | return ISIS_WARNING; |
f390d2c7 | 858 | } |
d62a17ae | 859 | |
d62a17ae | 860 | if (isis->debugs & DEBUG_UPDATE_PACKETS) { |
af8ac8f9 CF |
861 | zlog_debug("ISIS-Upd (%s): Rcvd L%d LSP %s, seq 0x%08" PRIx32 |
862 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 | |
863 | "s, len %" PRIu16 ", on %s", | |
864 | circuit->area->area_tag, level, | |
865 | rawlspid_print(hdr.lsp_id), hdr.seqno, hdr.checksum, | |
866 | hdr.rem_lifetime, hdr.pdu_len, | |
867 | circuit->interface->name); | |
f390d2c7 | 868 | } |
d62a17ae | 869 | |
870 | /* lsp is_type check */ | |
af8ac8f9 CF |
871 | if ((hdr.lsp_bits & IS_LEVEL_1) != IS_LEVEL_1) { |
872 | zlog_debug( | |
873 | "ISIS-Upd (%s): LSP %s invalid LSP is type 0x%" PRIx8, | |
874 | circuit->area->area_tag, rawlspid_print(hdr.lsp_id), | |
875 | hdr.lsp_bits & IS_LEVEL_1_AND_2); | |
d62a17ae | 876 | /* continue as per RFC1122 Be liberal in what you accept, and |
877 | * conservative in what you send */ | |
f390d2c7 | 878 | } |
d62a17ae | 879 | |
880 | /* Checksum sanity check - FIXME: move to correct place */ | |
881 | /* 12 = sysid+pdu+remtime */ | |
af8ac8f9 CF |
882 | if (iso_csum_verify(STREAM_DATA(circuit->rcv_stream) + 12, |
883 | hdr.pdu_len - 12, hdr.checksum, 12)) { | |
884 | zlog_debug( | |
885 | "ISIS-Upd (%s): LSP %s invalid LSP checksum 0x%04" PRIx16, | |
886 | circuit->area->area_tag, rawlspid_print(hdr.lsp_id), | |
887 | hdr.checksum); | |
d62a17ae | 888 | return ISIS_WARNING; |
f390d2c7 | 889 | } |
3f045a08 | 890 | |
d62a17ae | 891 | /* 7.3.15.1 a) 1 - external domain circuit will discard lsps */ |
892 | if (circuit->ext_domain) { | |
893 | zlog_debug( | |
894 | "ISIS-Upd (%s): LSP %s received at level %d over circuit with " | |
895 | "externalDomain = true", | |
af8ac8f9 | 896 | circuit->area->area_tag, rawlspid_print(hdr.lsp_id), |
d62a17ae | 897 | level); |
d62a17ae | 898 | return ISIS_WARNING; |
899 | } | |
eb5d44eb | 900 | |
d62a17ae | 901 | /* 7.3.15.1 a) 2,3 - manualL2OnlyMode not implemented */ |
af8ac8f9 | 902 | if (!(circuit->is_type & level)) { |
d62a17ae | 903 | zlog_debug( |
904 | "ISIS-Upd (%s): LSP %s received at level %d over circuit of" | |
905 | " type %s", | |
af8ac8f9 | 906 | circuit->area->area_tag, rawlspid_print(hdr.lsp_id), |
d62a17ae | 907 | level, circuit_t2string(circuit->is_type)); |
d62a17ae | 908 | return ISIS_WARNING; |
909 | } | |
0250758d | 910 | |
af8ac8f9 CF |
911 | struct isis_tlvs *tlvs = NULL; |
912 | int retval = ISIS_WARNING; | |
913 | const char *error_log; | |
914 | ||
915 | if (isis_unpack_tlvs(STREAM_READABLE(circuit->rcv_stream), | |
916 | circuit->rcv_stream, &tlvs, &error_log)) { | |
917 | zlog_warn("Something went wrong unpacking the LSP: %s", | |
918 | error_log); | |
86370604 EDP |
919 | #ifndef FABRICD |
920 | /* send northbound notification. Note that the tlv-type and | |
921 | * offset cannot correctly be set here as they are not returned | |
922 | * by isis_unpack_tlvs, but in there I cannot fire a | |
923 | * notification because I have no circuit information. So until | |
924 | * we change the code above to return those extra fields, we | |
925 | * will send dummy values which are ignored in the callback | |
926 | */ | |
927 | isis_notif_lsp_error(circuit, rawlspid_print(hdr.lsp_id), | |
928 | raw_pdu, 0, 0); | |
929 | #endif /* ifndef FABRICD */ | |
af8ac8f9 CF |
930 | goto out; |
931 | } | |
932 | ||
d62a17ae | 933 | /* 7.3.15.1 a) 4 - need to make sure IDLength matches */ |
934 | ||
935 | /* 7.3.15.1 a) 5 - maximum area match, can be ommited since we only use | |
936 | * 3 */ | |
937 | ||
938 | /* 7.3.15.1 a) 7 - password check */ | |
af8ac8f9 CF |
939 | struct isis_passwd *passwd = (level == ISIS_LEVEL1) |
940 | ? &circuit->area->area_passwd | |
941 | : &circuit->area->domain_passwd; | |
3380c990 EDP |
942 | int auth_code = isis_tlvs_auth_is_valid(tlvs, passwd, |
943 | circuit->rcv_stream, true); | |
944 | if (auth_code != ISIS_AUTH_OK) { | |
af8ac8f9 CF |
945 | isis_event_auth_failure(circuit->area->area_tag, |
946 | "LSP authentication failure", | |
947 | hdr.lsp_id); | |
3380c990 EDP |
948 | #ifndef FABRICD |
949 | /* send northbound notification */ | |
950 | if (auth_code == ISIS_AUTH_FAILURE) | |
951 | isis_notif_authentication_failure(circuit, raw_pdu); | |
952 | else /* AUTH_TYPE_FAILURE or NO_VALIDATOR */ | |
953 | isis_notif_authentication_type_failure(circuit, | |
954 | raw_pdu); | |
955 | #endif /* ifndef FABRICD */ | |
af8ac8f9 | 956 | goto out; |
f390d2c7 | 957 | } |
af8ac8f9 | 958 | |
d62a17ae | 959 | /* Find the LSP in our database and compare it to this Link State header |
960 | */ | |
af8ac8f9 CF |
961 | struct isis_lsp *lsp = |
962 | lsp_search(hdr.lsp_id, circuit->area->lspdb[level - 1]); | |
963 | int comp = 0; | |
d62a17ae | 964 | if (lsp) |
af8ac8f9 CF |
965 | comp = lsp_compare(circuit->area->area_tag, lsp, hdr.seqno, |
966 | hdr.checksum, hdr.rem_lifetime); | |
d62a17ae | 967 | if (lsp && (lsp->own_lsp)) |
968 | goto dontcheckadj; | |
969 | ||
970 | /* 7.3.15.1 a) 6 - Must check that we have an adjacency of the same | |
971 | * level */ | |
972 | /* for broadcast circuits, snpa should be compared */ | |
973 | ||
974 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) { | |
af8ac8f9 CF |
975 | if (!isis_adj_lookup_snpa(ssnpa, |
976 | circuit->u.bc.adjdb[level - 1])) { | |
977 | zlog_debug("(%s): DS ======= LSP %s, seq 0x%08" PRIx32 | |
978 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 | |
979 | "s on %s", | |
980 | circuit->area->area_tag, | |
981 | rawlspid_print(hdr.lsp_id), hdr.seqno, | |
982 | hdr.checksum, hdr.rem_lifetime, | |
983 | circuit->interface->name); | |
984 | goto out; /* Silently discard */ | |
d62a17ae | 985 | } |
986 | } | |
987 | /* for non broadcast, we just need to find same level adj */ | |
988 | else { | |
989 | /* If no adj, or no sharing of level */ | |
990 | if (!circuit->u.p2p.neighbor) { | |
af8ac8f9 CF |
991 | retval = ISIS_OK; |
992 | goto out; | |
d62a17ae | 993 | } else { |
994 | if (((level == IS_LEVEL_1) | |
995 | && (circuit->u.p2p.neighbor->adj_usage | |
996 | == ISIS_ADJ_LEVEL2)) | |
997 | || ((level == IS_LEVEL_2) | |
998 | && (circuit->u.p2p.neighbor->adj_usage | |
999 | == ISIS_ADJ_LEVEL1))) | |
af8ac8f9 | 1000 | goto out; |
f390d2c7 | 1001 | } |
f390d2c7 | 1002 | } |
f390d2c7 | 1003 | |
af8ac8f9 CF |
1004 | bool lsp_confusion; |
1005 | ||
d62a17ae | 1006 | dontcheckadj: |
1007 | /* 7.3.15.1 a) 7 - Passwords for level 1 - not implemented */ | |
1008 | ||
1009 | /* 7.3.15.1 a) 8 - Passwords for level 2 - not implemented */ | |
1010 | ||
1011 | /* 7.3.15.1 a) 9 - OriginatingLSPBufferSize - not implemented FIXME: do | |
1012 | * it */ | |
1013 | ||
1014 | /* 7.3.16.2 - If this is an LSP from another IS with identical seq_num | |
1015 | * but | |
1016 | * wrong checksum, initiate a purge. */ | |
af8ac8f9 | 1017 | if (lsp && (lsp->hdr.seqno == hdr.seqno) |
2c92bee4 CF |
1018 | && (lsp->hdr.checksum != hdr.checksum) |
1019 | && hdr.rem_lifetime) { | |
af8ac8f9 CF |
1020 | zlog_warn("ISIS-Upd (%s): LSP %s seq 0x%08" PRIx32 |
1021 | " with confused checksum received.", | |
1022 | circuit->area->area_tag, rawlspid_print(hdr.lsp_id), | |
1023 | hdr.seqno); | |
1024 | hdr.rem_lifetime = 0; | |
1025 | lsp_confusion = true; | |
d62a17ae | 1026 | } else |
af8ac8f9 | 1027 | lsp_confusion = false; |
d62a17ae | 1028 | |
1029 | /* 7.3.15.1 b) - If the remaining life time is 0, we perform 7.3.16.4 */ | |
af8ac8f9 | 1030 | if (hdr.rem_lifetime == 0) { |
d62a17ae | 1031 | if (!lsp) { |
1032 | /* 7.3.16.4 a) 1) No LSP in db -> send an ack, but don't | |
1033 | * save */ | |
1034 | /* only needed on explicit update, eg - p2p */ | |
1035 | if (circuit->circ_type == CIRCUIT_T_P2P) | |
af8ac8f9 CF |
1036 | ack_lsp(&hdr, circuit, level); |
1037 | goto out; /* FIXME: do we need a purge? */ | |
d62a17ae | 1038 | } else { |
af8ac8f9 | 1039 | if (memcmp(hdr.lsp_id, isis->sysid, ISIS_SYS_ID_LEN)) { |
d62a17ae | 1040 | /* LSP by some other system -> do 7.3.16.4 b) */ |
1041 | /* 7.3.16.4 b) 1) */ | |
1042 | if (comp == LSP_NEWER) { | |
af8ac8f9 CF |
1043 | lsp_update(lsp, &hdr, tlvs, |
1044 | circuit->rcv_stream, | |
164066e4 CF |
1045 | circuit->area, level, |
1046 | lsp_confusion); | |
af8ac8f9 | 1047 | tlvs = NULL; |
d62a17ae | 1048 | /* ii */ |
a6b60da9 CF |
1049 | lsp_flood_or_update(lsp, NULL, |
1050 | circuit_scoped); | |
d62a17ae | 1051 | /* v */ |
1052 | ISIS_FLAGS_CLEAR_ALL( | |
996c9314 LB |
1053 | lsp->SSNflags); /* FIXME: |
1054 | OTHER | |
1055 | than c | |
1056 | */ | |
d62a17ae | 1057 | |
1058 | /* For the case of lsp confusion, flood | |
1059 | * the purge back to its | |
1060 | * originator so that it can react. | |
1061 | * Otherwise, don't reflood | |
1062 | * through incoming circuit as usual */ | |
1063 | if (!lsp_confusion) { | |
9b39405f CF |
1064 | isis_tx_queue_del( |
1065 | circuit->tx_queue, | |
1066 | lsp); | |
1067 | ||
d62a17ae | 1068 | /* iv */ |
1069 | if (circuit->circ_type | |
1070 | != CIRCUIT_T_BROADCAST) | |
1071 | ISIS_SET_FLAG( | |
1072 | lsp->SSNflags, | |
1073 | circuit); | |
1074 | } | |
1075 | } /* 7.3.16.4 b) 2) */ | |
1076 | else if (comp == LSP_EQUAL) { | |
1077 | /* i */ | |
9b39405f CF |
1078 | isis_tx_queue_del(circuit->tx_queue, |
1079 | lsp); | |
d62a17ae | 1080 | /* ii */ |
1081 | if (circuit->circ_type | |
1082 | != CIRCUIT_T_BROADCAST) | |
1083 | ISIS_SET_FLAG(lsp->SSNflags, | |
1084 | circuit); | |
1085 | } /* 7.3.16.4 b) 3) */ | |
1086 | else { | |
9b39405f CF |
1087 | isis_tx_queue_add(circuit->tx_queue, |
1088 | lsp, TX_LSP_NORMAL); | |
d62a17ae | 1089 | ISIS_CLEAR_FLAG(lsp->SSNflags, circuit); |
1090 | } | |
af8ac8f9 | 1091 | } else if (lsp->hdr.rem_lifetime != 0) { |
d62a17ae | 1092 | /* our own LSP -> 7.3.16.4 c) */ |
1093 | if (comp == LSP_NEWER) { | |
897989f8 EDP |
1094 | #ifndef FABRICD |
1095 | if (lsp->hdr.seqno < hdr.seqno) { | |
1096 | /* send northbound | |
1097 | * notification */ | |
1098 | isis_notif_seqno_skipped( | |
1099 | circuit, | |
1100 | rawlspid_print( | |
1101 | hdr.lsp_id)); | |
1102 | } | |
1103 | #endif /* ifndef FABRICD */ | |
af8ac8f9 | 1104 | lsp_inc_seqno(lsp, hdr.seqno); |
89cdc4df RM |
1105 | lsp_flood_or_update(lsp, NULL, |
1106 | circuit_scoped); | |
d62a17ae | 1107 | } else { |
9b39405f CF |
1108 | isis_tx_queue_add(circuit->tx_queue, |
1109 | lsp, TX_LSP_NORMAL); | |
d62a17ae | 1110 | ISIS_CLEAR_FLAG(lsp->SSNflags, circuit); |
1111 | } | |
1112 | if (isis->debugs & DEBUG_UPDATE_PACKETS) | |
1113 | zlog_debug( | |
89cdc4df RM |
1114 | "ISIS-Upd (%s): (1) " |
1115 | "re-originating LSP %s new seq " | |
1116 | "0x%08" PRIx32, | |
d62a17ae | 1117 | circuit->area->area_tag, |
af8ac8f9 CF |
1118 | rawlspid_print(hdr.lsp_id), |
1119 | lsp->hdr.seqno); | |
d62a17ae | 1120 | } |
f390d2c7 | 1121 | } |
af8ac8f9 | 1122 | goto out; |
f390d2c7 | 1123 | } |
d62a17ae | 1124 | /* 7.3.15.1 c) - If this is our own lsp and we don't have it initiate a |
1125 | * purge */ | |
af8ac8f9 | 1126 | if (memcmp(hdr.lsp_id, isis->sysid, ISIS_SYS_ID_LEN) == 0) { |
d62a17ae | 1127 | if (!lsp) { |
1128 | /* 7.3.16.4: initiate a purge */ | |
af8ac8f9 CF |
1129 | lsp_purge_non_exist(level, &hdr, circuit->area); |
1130 | retval = ISIS_OK; | |
1131 | goto out; | |
d62a17ae | 1132 | } |
1133 | /* 7.3.15.1 d) - If this is our own lsp and we have it */ | |
1134 | ||
1135 | /* In 7.3.16.1, If an Intermediate system R somewhere in the | |
1136 | * domain | |
1137 | * has information that the current sequence number for source S | |
1138 | * is | |
1139 | * "greater" than that held by S, ... */ | |
1140 | ||
562d7ef7 | 1141 | if (comp == LSP_NEWER) { |
d62a17ae | 1142 | /* 7.3.16.1 */ |
af8ac8f9 | 1143 | lsp_inc_seqno(lsp, hdr.seqno); |
897989f8 EDP |
1144 | #ifndef FABRICD |
1145 | /* send northbound notification */ | |
1146 | isis_notif_seqno_skipped(circuit, | |
1147 | rawlspid_print(hdr.lsp_id)); | |
1148 | #endif /* ifndef FABRICD */ | |
562d7ef7 | 1149 | if (isis->debugs & DEBUG_UPDATE_PACKETS) { |
d62a17ae | 1150 | zlog_debug( |
af8ac8f9 | 1151 | "ISIS-Upd (%s): (2) re-originating LSP %s new seq 0x%08" PRIx32, |
d62a17ae | 1152 | circuit->area->area_tag, |
af8ac8f9 CF |
1153 | rawlspid_print(hdr.lsp_id), |
1154 | lsp->hdr.seqno); | |
562d7ef7 CF |
1155 | } |
1156 | lsp_flood(lsp, NULL); | |
1157 | } else if (comp == LSP_EQUAL) { | |
1158 | isis_tx_queue_del(circuit->tx_queue, lsp); | |
1159 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
1160 | ISIS_SET_FLAG(lsp->SSNflags, circuit); | |
1161 | } else { | |
1162 | isis_tx_queue_add(circuit->tx_queue, lsp, | |
1163 | TX_LSP_NORMAL); | |
1164 | ISIS_CLEAR_FLAG(lsp->SSNflags, circuit); | |
d62a17ae | 1165 | } |
d62a17ae | 1166 | } else { |
1167 | /* 7.3.15.1 e) - This lsp originated on another system */ | |
1168 | ||
1169 | /* 7.3.15.1 e) 1) LSP newer than the one in db or no LSP in db | |
1170 | */ | |
1171 | if ((!lsp || comp == LSP_NEWER)) { | |
1172 | /* | |
1173 | * If this lsp is a frag, need to see if we have zero | |
1174 | * lsp present | |
1175 | */ | |
af8ac8f9 CF |
1176 | struct isis_lsp *lsp0 = NULL; |
1177 | if (LSP_FRAGMENT(hdr.lsp_id) != 0) { | |
1178 | uint8_t lspid[ISIS_SYS_ID_LEN + 2]; | |
1179 | memcpy(lspid, hdr.lsp_id, ISIS_SYS_ID_LEN + 1); | |
d62a17ae | 1180 | LSP_FRAGMENT(lspid) = 0; |
1181 | lsp0 = lsp_search( | |
1182 | lspid, circuit->area->lspdb[level - 1]); | |
1183 | if (!lsp0) { | |
1184 | zlog_debug( | |
1185 | "Got lsp frag, while zero lsp not in database"); | |
df0ba689 | 1186 | goto out; |
d62a17ae | 1187 | } |
1188 | } | |
1189 | /* i */ | |
1190 | if (!lsp) { | |
af8ac8f9 CF |
1191 | lsp = lsp_new_from_recv( |
1192 | &hdr, tlvs, circuit->rcv_stream, lsp0, | |
d62a17ae | 1193 | circuit->area, level); |
af8ac8f9 | 1194 | tlvs = NULL; |
d62a17ae | 1195 | lsp_insert(lsp, |
1196 | circuit->area->lspdb[level - 1]); | |
1197 | } else /* exists, so we overwrite */ | |
1198 | { | |
af8ac8f9 | 1199 | lsp_update(lsp, &hdr, tlvs, circuit->rcv_stream, |
164066e4 | 1200 | circuit->area, level, false); |
af8ac8f9 | 1201 | tlvs = NULL; |
d62a17ae | 1202 | } |
a6b60da9 | 1203 | lsp_flood_or_update(lsp, circuit, circuit_scoped); |
d62a17ae | 1204 | |
1205 | /* iv */ | |
1206 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
1207 | ISIS_SET_FLAG(lsp->SSNflags, circuit); | |
1208 | /* FIXME: v) */ | |
1209 | } | |
1210 | /* 7.3.15.1 e) 2) LSP equal to the one in db */ | |
1211 | else if (comp == LSP_EQUAL) { | |
9b39405f | 1212 | isis_tx_queue_del(circuit->tx_queue, lsp); |
af8ac8f9 | 1213 | lsp_update(lsp, &hdr, tlvs, circuit->rcv_stream, |
164066e4 | 1214 | circuit->area, level, false); |
af8ac8f9 | 1215 | tlvs = NULL; |
d62a17ae | 1216 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) |
1217 | ISIS_SET_FLAG(lsp->SSNflags, circuit); | |
1218 | } | |
1219 | /* 7.3.15.1 e) 3) LSP older than the one in db */ | |
1220 | else { | |
9b39405f CF |
1221 | isis_tx_queue_add(circuit->tx_queue, lsp, |
1222 | TX_LSP_NORMAL); | |
d62a17ae | 1223 | ISIS_CLEAR_FLAG(lsp->SSNflags, circuit); |
1224 | } | |
f390d2c7 | 1225 | } |
af8ac8f9 CF |
1226 | |
1227 | retval = ISIS_OK; | |
1228 | ||
1229 | out: | |
e923107c | 1230 | fabricd_trigger_csnp(circuit->area, circuit_scoped); |
df0ba689 | 1231 | |
af8ac8f9 | 1232 | isis_free_tlvs(tlvs); |
d62a17ae | 1233 | return retval; |
eb5d44eb | 1234 | } |
1235 | ||
1236 | /* | |
1237 | * Process Sequence Numbers | |
1238 | * ISO - 10589 | |
1239 | * Section 7.3.15.2 - Action on receipt of a sequence numbers PDU | |
1240 | */ | |
1241 | ||
17c9dcd5 | 1242 | static int process_snp(uint8_t pdu_type, struct isis_circuit *circuit, |
d7c0a89a | 1243 | const uint8_t *ssnpa) |
eb5d44eb | 1244 | { |
3380c990 EDP |
1245 | #ifndef FABRICD |
1246 | size_t pdu_start = stream_get_getp(circuit->rcv_stream); | |
1247 | size_t pdu_end = stream_get_endp(circuit->rcv_stream); | |
1248 | char raw_pdu[pdu_end - pdu_start]; | |
1249 | #endif /* ifndef FABRICD */ | |
1250 | ||
17c9dcd5 CF |
1251 | bool is_csnp = (pdu_type == L1_COMPLETE_SEQ_NUM |
1252 | || pdu_type == L2_COMPLETE_SEQ_NUM); | |
1253 | char typechar = is_csnp ? 'C' : 'P'; | |
1254 | int level = (pdu_type == L1_COMPLETE_SEQ_NUM | |
1255 | || pdu_type == L1_PARTIAL_SEQ_NUM) | |
1256 | ? ISIS_LEVEL1 | |
1257 | : ISIS_LEVEL2; | |
1258 | ||
1259 | uint16_t pdu_len = stream_getw(circuit->rcv_stream); | |
1260 | uint8_t rem_sys_id[ISIS_SYS_ID_LEN]; | |
3380c990 | 1261 | |
17c9dcd5 CF |
1262 | stream_get(rem_sys_id, circuit->rcv_stream, ISIS_SYS_ID_LEN); |
1263 | stream_forward_getp(circuit->rcv_stream, 1); /* Circuit ID - unused */ | |
1264 | ||
3e300703 DL |
1265 | uint8_t start_lsp_id[ISIS_SYS_ID_LEN + 2] = {}; |
1266 | uint8_t stop_lsp_id[ISIS_SYS_ID_LEN + 2] = {}; | |
17c9dcd5 CF |
1267 | |
1268 | if (is_csnp) { | |
1269 | stream_get(start_lsp_id, circuit->rcv_stream, | |
1270 | ISIS_SYS_ID_LEN + 2); | |
1271 | stream_get(stop_lsp_id, circuit->rcv_stream, | |
1272 | ISIS_SYS_ID_LEN + 2); | |
1273 | } | |
1274 | ||
1275 | if (pdu_len_validate(pdu_len, circuit)) { | |
1276 | zlog_warn("Received a CSNP with bogus length %d", pdu_len); | |
1277 | return ISIS_WARNING; | |
f390d2c7 | 1278 | } |
eb5d44eb | 1279 | |
17c9dcd5 CF |
1280 | if (isis->debugs & DEBUG_SNP_PACKETS) { |
1281 | zlog_debug( | |
1282 | "ISIS-Snp (%s): Rcvd L%d %cSNP on %s, cirType %s, cirID %u", | |
1283 | circuit->area->area_tag, level, typechar, | |
1284 | circuit->interface->name, | |
1285 | circuit_t2string(circuit->is_type), | |
1286 | circuit->circuit_id); | |
1287 | if (isis->debugs & DEBUG_PACKET_DUMP) | |
1288 | zlog_dump_data(STREAM_DATA(circuit->rcv_stream), | |
1289 | stream_get_endp(circuit->rcv_stream)); | |
1290 | } | |
eb5d44eb | 1291 | |
d62a17ae | 1292 | /* 7.3.15.2 a) 1 - external domain circuit will discard snp pdu */ |
1293 | if (circuit->ext_domain) { | |
f390d2c7 | 1294 | |
d62a17ae | 1295 | zlog_debug( |
1296 | "ISIS-Snp (%s): Rcvd L%d %cSNP on %s, " | |
1297 | "skipping: circuit externalDomain = true", | |
1298 | circuit->area->area_tag, level, typechar, | |
1299 | circuit->interface->name); | |
f390d2c7 | 1300 | |
d62a17ae | 1301 | return ISIS_OK; |
1302 | } | |
eb5d44eb | 1303 | |
d62a17ae | 1304 | /* 7.3.15.2 a) 2,3 - manualL2OnlyMode not implemented */ |
af8ac8f9 | 1305 | if (!(circuit->is_type & level)) { |
d62a17ae | 1306 | zlog_debug( |
1307 | "ISIS-Snp (%s): Rcvd L%d %cSNP on %s, " | |
1308 | "skipping: circuit type %s does not match level %d", | |
1309 | circuit->area->area_tag, level, typechar, | |
1310 | circuit->interface->name, | |
1311 | circuit_t2string(circuit->is_type), level); | |
eb5d44eb | 1312 | |
d62a17ae | 1313 | return ISIS_OK; |
f390d2c7 | 1314 | } |
eb5d44eb | 1315 | |
d62a17ae | 1316 | /* 7.3.15.2 a) 4 - not applicable for CSNP only PSNPs on broadcast */ |
17c9dcd5 CF |
1317 | if (!is_csnp && (circuit->circ_type == CIRCUIT_T_BROADCAST) |
1318 | && !circuit->u.bc.is_dr[level - 1]) { | |
d62a17ae | 1319 | zlog_debug( |
1320 | "ISIS-Snp (%s): Rcvd L%d %cSNP from %s on %s, " | |
1321 | "skipping: we are not the DIS", | |
1322 | circuit->area->area_tag, level, typechar, | |
1323 | snpa_print(ssnpa), circuit->interface->name); | |
1324 | ||
1325 | return ISIS_OK; | |
1326 | } | |
eb5d44eb | 1327 | |
d62a17ae | 1328 | /* 7.3.15.2 a) 5 - need to make sure IDLength matches - already checked |
1329 | */ | |
1330 | ||
1331 | /* 7.3.15.2 a) 6 - maximum area match, can be ommited since we only use | |
1332 | * 3 | |
1333 | * - already checked */ | |
1334 | ||
1335 | /* 7.3.15.2 a) 7 - Must check that we have an adjacency of the same | |
1336 | * level */ | |
1337 | /* for broadcast circuits, snpa should be compared */ | |
1338 | /* FIXME : Do we need to check SNPA? */ | |
1339 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) { | |
17c9dcd5 CF |
1340 | if (!isis_adj_lookup(rem_sys_id, |
1341 | circuit->u.bc.adjdb[level - 1])) | |
d62a17ae | 1342 | return ISIS_OK; /* Silently discard */ |
1343 | } else { | |
8e6fb83b | 1344 | if (!fabricd && !circuit->u.p2p.neighbor) { |
d62a17ae | 1345 | zlog_warn("no p2p neighbor on circuit %s", |
1346 | circuit->interface->name); | |
1347 | return ISIS_OK; /* Silently discard */ | |
1348 | } | |
1349 | } | |
eb5d44eb | 1350 | |
17c9dcd5 CF |
1351 | struct isis_tlvs *tlvs; |
1352 | int retval = ISIS_WARNING; | |
1353 | const char *error_log; | |
eb5d44eb | 1354 | |
17c9dcd5 CF |
1355 | if (isis_unpack_tlvs(STREAM_READABLE(circuit->rcv_stream), |
1356 | circuit->rcv_stream, &tlvs, &error_log)) { | |
1357 | zlog_warn("Something went wrong unpacking the SNP: %s", | |
1358 | error_log); | |
1359 | goto out; | |
f390d2c7 | 1360 | } |
eb5d44eb | 1361 | |
17c9dcd5 CF |
1362 | struct isis_passwd *passwd = (level == IS_LEVEL_1) |
1363 | ? &circuit->area->area_passwd | |
1364 | : &circuit->area->domain_passwd; | |
3380c990 EDP |
1365 | if (CHECK_FLAG(passwd->snp_auth, SNP_AUTH_RECV)) { |
1366 | int auth_code = isis_tlvs_auth_is_valid( | |
1367 | tlvs, passwd, circuit->rcv_stream, false); | |
1368 | if (auth_code != ISIS_AUTH_OK) { | |
1369 | isis_event_auth_failure(circuit->area->area_tag, | |
1370 | "SNP authentication failure", | |
1371 | rem_sys_id); | |
1372 | #ifndef FABRICD | |
1373 | /* send northbound notification */ | |
1374 | stream_get_from(raw_pdu, circuit->rcv_stream, pdu_start, | |
1375 | pdu_end - pdu_start); | |
1376 | if (auth_code == ISIS_AUTH_FAILURE) | |
1377 | isis_notif_authentication_failure(circuit, | |
1378 | raw_pdu); | |
1379 | else /* AUTH_TYPE_FAILURE or NO_VALIDATOR */ | |
1380 | isis_notif_authentication_type_failure(circuit, | |
1381 | raw_pdu); | |
1382 | #endif /* ifndef FABRICD */ | |
1383 | goto out; | |
1384 | } | |
d62a17ae | 1385 | } |
eb5d44eb | 1386 | |
17c9dcd5 CF |
1387 | struct isis_lsp_entry *entry_head = |
1388 | (struct isis_lsp_entry *)tlvs->lsp_entries.head; | |
1389 | ||
d62a17ae | 1390 | /* debug isis snp-packets */ |
1391 | if (isis->debugs & DEBUG_SNP_PACKETS) { | |
1392 | zlog_debug("ISIS-Snp (%s): Rcvd L%d %cSNP from %s on %s", | |
1393 | circuit->area->area_tag, level, typechar, | |
1394 | snpa_print(ssnpa), circuit->interface->name); | |
17c9dcd5 CF |
1395 | for (struct isis_lsp_entry *entry = entry_head; entry; |
1396 | entry = entry->next) { | |
1397 | zlog_debug( | |
1398 | "ISIS-Snp (%s): %cSNP entry %s, seq 0x%08" PRIx32 | |
98c5bc15 | 1399 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 "s", |
17c9dcd5 CF |
1400 | circuit->area->area_tag, typechar, |
1401 | rawlspid_print(entry->id), entry->seqno, | |
1402 | entry->checksum, entry->rem_lifetime); | |
f390d2c7 | 1403 | } |
f390d2c7 | 1404 | } |
3f045a08 | 1405 | |
df0ba689 CF |
1406 | bool resync_needed = false; |
1407 | ||
d62a17ae | 1408 | /* 7.3.15.2 b) Actions on LSP_ENTRIES reported */ |
17c9dcd5 CF |
1409 | for (struct isis_lsp_entry *entry = entry_head; entry; |
1410 | entry = entry->next) { | |
1411 | struct isis_lsp *lsp = | |
1412 | lsp_search(entry->id, circuit->area->lspdb[level - 1]); | |
1413 | bool own_lsp = !memcmp(entry->id, isis->sysid, ISIS_SYS_ID_LEN); | |
1414 | if (lsp) { | |
1415 | /* 7.3.15.2 b) 1) is this LSP newer */ | |
1416 | int cmp = lsp_compare(circuit->area->area_tag, lsp, | |
1417 | entry->seqno, entry->checksum, | |
1418 | entry->rem_lifetime); | |
1419 | /* 7.3.15.2 b) 2) if it equals, clear SRM on p2p */ | |
1420 | if (cmp == LSP_EQUAL) { | |
1421 | /* if (circuit->circ_type != | |
1422 | * CIRCUIT_T_BROADCAST) */ | |
9b39405f | 1423 | isis_tx_queue_del(circuit->tx_queue, lsp); |
17c9dcd5 CF |
1424 | } |
1425 | /* 7.3.15.2 b) 3) if it is older, clear SSN and set SRM | |
1426 | */ | |
1427 | else if (cmp == LSP_OLDER) { | |
1428 | ISIS_CLEAR_FLAG(lsp->SSNflags, circuit); | |
9b39405f CF |
1429 | isis_tx_queue_add(circuit->tx_queue, lsp, |
1430 | TX_LSP_NORMAL); | |
17c9dcd5 CF |
1431 | } |
1432 | /* 7.3.15.2 b) 4) if it is newer, set SSN and clear SRM | |
1433 | on p2p */ | |
1434 | else { | |
1435 | if (own_lsp) { | |
af8ac8f9 | 1436 | lsp_inc_seqno(lsp, entry->seqno); |
9b39405f CF |
1437 | isis_tx_queue_add(circuit->tx_queue, lsp, |
1438 | TX_LSP_NORMAL); | |
17c9dcd5 CF |
1439 | } else { |
1440 | ISIS_SET_FLAG(lsp->SSNflags, circuit); | |
d62a17ae | 1441 | /* if (circuit->circ_type != |
1442 | * CIRCUIT_T_BROADCAST) */ | |
9b39405f | 1443 | isis_tx_queue_del(circuit->tx_queue, lsp); |
df0ba689 | 1444 | resync_needed = true; |
d62a17ae | 1445 | } |
17c9dcd5 CF |
1446 | } |
1447 | } else { | |
1448 | /* 7.3.15.2 b) 5) if it was not found, and all of those | |
1449 | * are not 0, | |
1450 | * insert it and set SSN on it */ | |
1451 | if (entry->rem_lifetime && entry->checksum | |
1452 | && entry->seqno && memcmp(entry->id, isis->sysid, | |
1453 | ISIS_SYS_ID_LEN)) { | |
8f5dbe18 CF |
1454 | struct isis_lsp *lsp0 = NULL; |
1455 | ||
1456 | if (LSP_FRAGMENT(entry->id)) { | |
1457 | uint8_t lspid[ISIS_SYS_ID_LEN + 2]; | |
1458 | ||
1459 | memcpy(lspid, entry->id, | |
1460 | ISIS_SYS_ID_LEN + 1); | |
1461 | LSP_FRAGMENT(lspid) = 0; | |
1462 | lsp0 = lsp_search( | |
98c5bc15 CF |
1463 | lspid, |
1464 | circuit->area->lspdb[level - 1]); | |
8f5dbe18 | 1465 | if (!lsp0) { |
98c5bc15 | 1466 | zlog_debug("Got lsp frag in snp, while zero not in database"); |
8f5dbe18 CF |
1467 | continue; |
1468 | } | |
1469 | } | |
f7813c7c | 1470 | lsp = lsp_new(circuit->area, entry->id, |
17c9dcd5 | 1471 | entry->rem_lifetime, 0, 0, |
8f5dbe18 | 1472 | entry->checksum, lsp0, level); |
17c9dcd5 CF |
1473 | lsp_insert(lsp, |
1474 | circuit->area->lspdb[level - 1]); | |
9b39405f CF |
1475 | |
1476 | lsp_set_all_srmflags(lsp, false); | |
17c9dcd5 | 1477 | ISIS_SET_FLAG(lsp->SSNflags, circuit); |
df0ba689 | 1478 | resync_needed = true; |
d62a17ae | 1479 | } |
1480 | } | |
1481 | } | |
eb5d44eb | 1482 | |
d62a17ae | 1483 | /* 7.3.15.2 c) on CSNP set SRM for all in range which were not reported |
1484 | */ | |
17c9dcd5 | 1485 | if (is_csnp) { |
d62a17ae | 1486 | /* |
1487 | * Build a list from our own LSP db bounded with | |
1488 | * start_lsp_id and stop_lsp_id | |
1489 | */ | |
17c9dcd5 CF |
1490 | struct list *lsp_list = list_new(); |
1491 | lsp_build_list_nonzero_ht(start_lsp_id, stop_lsp_id, lsp_list, | |
d62a17ae | 1492 | circuit->area->lspdb[level - 1]); |
1493 | ||
1494 | /* Fixme: Find a better solution */ | |
17c9dcd5 CF |
1495 | struct listnode *node, *nnode; |
1496 | struct isis_lsp *lsp; | |
1497 | for (struct isis_lsp_entry *entry = entry_head; entry; | |
1498 | entry = entry->next) { | |
1499 | for (ALL_LIST_ELEMENTS(lsp_list, node, nnode, lsp)) { | |
af8ac8f9 | 1500 | if (lsp_id_cmp(lsp->hdr.lsp_id, entry->id) |
17c9dcd5 CF |
1501 | == 0) { |
1502 | list_delete_node(lsp_list, node); | |
1503 | break; | |
d62a17ae | 1504 | } |
1505 | } | |
1506 | } | |
17c9dcd5 | 1507 | |
d62a17ae | 1508 | /* on remaining LSPs we set SRM (neighbor knew not of) */ |
9b39405f CF |
1509 | for (ALL_LIST_ELEMENTS_RO(lsp_list, node, lsp)) { |
1510 | isis_tx_queue_add(circuit->tx_queue, lsp, TX_LSP_NORMAL); | |
df0ba689 | 1511 | resync_needed = true; |
9b39405f CF |
1512 | } |
1513 | ||
d62a17ae | 1514 | /* lets free it */ |
6a154c88 | 1515 | list_delete(&lsp_list); |
d62a17ae | 1516 | } |
1517 | ||
df0ba689 CF |
1518 | if (fabricd_initial_sync_is_complete(circuit->area) && resync_needed) |
1519 | zlog_warn("OpenFabric: Needed to resync LSPDB using CSNP!\n"); | |
1520 | ||
17c9dcd5 CF |
1521 | retval = ISIS_OK; |
1522 | out: | |
1523 | isis_free_tlvs(tlvs); | |
d62a17ae | 1524 | return retval; |
eb5d44eb | 1525 | } |
1526 | ||
88f9d911 CF |
1527 | static int pdu_size(uint8_t pdu_type, uint8_t *size) |
1528 | { | |
1529 | switch (pdu_type) { | |
1530 | case L1_LAN_HELLO: | |
1531 | case L2_LAN_HELLO: | |
1532 | *size = ISIS_LANHELLO_HDRLEN; | |
1533 | break; | |
1534 | case P2P_HELLO: | |
1535 | *size = ISIS_P2PHELLO_HDRLEN; | |
1536 | break; | |
1537 | case L1_LINK_STATE: | |
1538 | case L2_LINK_STATE: | |
1cbd5b37 | 1539 | case FS_LINK_STATE: |
88f9d911 CF |
1540 | *size = ISIS_LSP_HDR_LEN; |
1541 | break; | |
1542 | case L1_COMPLETE_SEQ_NUM: | |
1543 | case L2_COMPLETE_SEQ_NUM: | |
1544 | *size = ISIS_CSNP_HDRLEN; | |
1545 | break; | |
1546 | case L1_PARTIAL_SEQ_NUM: | |
1547 | case L2_PARTIAL_SEQ_NUM: | |
1548 | *size = ISIS_PSNP_HDRLEN; | |
1549 | break; | |
1550 | default: | |
1551 | return 1; | |
1552 | } | |
1553 | *size += ISIS_FIXED_HDR_LEN; | |
1554 | return 0; | |
1555 | } | |
1556 | ||
eb5d44eb | 1557 | /* |
1558 | * PDU Dispatcher | |
1559 | */ | |
1560 | ||
d7c0a89a | 1561 | int isis_handle_pdu(struct isis_circuit *circuit, uint8_t *ssnpa) |
eb5d44eb | 1562 | { |
d62a17ae | 1563 | int retval = ISIS_OK; |
2ab5a2d1 EDP |
1564 | size_t pdu_start = stream_get_getp(circuit->rcv_stream); |
1565 | size_t pdu_end = stream_get_endp(circuit->rcv_stream); | |
1566 | char raw_pdu[pdu_end - pdu_start]; | |
1567 | ||
1568 | stream_get_from(raw_pdu, circuit->rcv_stream, pdu_start, | |
1569 | pdu_end - pdu_start); | |
eb5d44eb | 1570 | |
88f9d911 CF |
1571 | /* Verify that at least the 8 bytes fixed header have been received */ |
1572 | if (stream_get_endp(circuit->rcv_stream) < ISIS_FIXED_HDR_LEN) { | |
1a7ecb96 | 1573 | flog_err(EC_ISIS_PACKET, "PDU is too short to be IS-IS."); |
88f9d911 CF |
1574 | return ISIS_ERROR; |
1575 | } | |
eb5d44eb | 1576 | |
88f9d911 CF |
1577 | uint8_t idrp = stream_getc(circuit->rcv_stream); |
1578 | uint8_t length = stream_getc(circuit->rcv_stream); | |
1579 | uint8_t version1 = stream_getc(circuit->rcv_stream); | |
1580 | uint8_t id_len = stream_getc(circuit->rcv_stream); | |
1581 | uint8_t pdu_type = stream_getc(circuit->rcv_stream) | |
1582 | & 0x1f; /* bits 6-8 are reserved */ | |
1583 | uint8_t version2 = stream_getc(circuit->rcv_stream); | |
2ab5a2d1 | 1584 | |
88f9d911 CF |
1585 | stream_forward_getp(circuit->rcv_stream, 1); /* reserved */ |
1586 | uint8_t max_area_addrs = stream_getc(circuit->rcv_stream); | |
1587 | ||
39bb53d6 CF |
1588 | pdu_counter_count(circuit->area->pdu_rx_counters, pdu_type); |
1589 | ||
88f9d911 | 1590 | if (idrp == ISO9542_ESIS) { |
450971aa | 1591 | flog_err(EC_LIB_DEVELOPMENT, |
1c50c1c0 | 1592 | "No support for ES-IS packet IDRP=%" PRIx8, idrp); |
d62a17ae | 1593 | return ISIS_ERROR; |
1594 | } | |
eb5d44eb | 1595 | |
88f9d911 | 1596 | if (idrp != ISO10589_ISIS) { |
1a7ecb96 | 1597 | flog_err(EC_ISIS_PACKET, "Not an IS-IS packet IDRP=%" PRIx8, |
1c50c1c0 | 1598 | idrp); |
d62a17ae | 1599 | return ISIS_ERROR; |
1600 | } | |
3f045a08 | 1601 | |
88f9d911 CF |
1602 | if (version1 != 1) { |
1603 | zlog_warn("Unsupported ISIS version %" PRIu8, version1); | |
0532bd84 EDP |
1604 | #ifndef FABRICD |
1605 | /* send northbound notification */ | |
1606 | isis_notif_version_skew(circuit, version1, raw_pdu); | |
1607 | #endif /* ifndef FABRICD */ | |
88f9d911 CF |
1608 | return ISIS_WARNING; |
1609 | } | |
eb5d44eb | 1610 | |
88f9d911 | 1611 | if (id_len != 0 && id_len != ISIS_SYS_ID_LEN) { |
af4c2728 | 1612 | flog_err( |
1a7ecb96 | 1613 | EC_ISIS_PACKET, |
88f9d911 CF |
1614 | "IDFieldLengthMismatch: ID Length field in a received PDU %" PRIu8 |
1615 | ", while the parameter for this IS is %u", | |
1616 | id_len, ISIS_SYS_ID_LEN); | |
e98d7633 EDP |
1617 | #ifndef FABRICD |
1618 | /* send northbound notification */ | |
1619 | isis_notif_id_len_mismatch(circuit, id_len, raw_pdu); | |
1620 | #endif /* ifndef FABRICD */ | |
d62a17ae | 1621 | return ISIS_ERROR; |
1622 | } | |
eb5d44eb | 1623 | |
88f9d911 CF |
1624 | uint8_t expected_length; |
1625 | if (pdu_size(pdu_type, &expected_length)) { | |
1626 | zlog_warn("Unsupported ISIS PDU %" PRIu8, pdu_type); | |
d62a17ae | 1627 | return ISIS_WARNING; |
1628 | } | |
88f9d911 CF |
1629 | |
1630 | if (length != expected_length) { | |
1a7ecb96 | 1631 | flog_err(EC_ISIS_PACKET, |
1c50c1c0 QY |
1632 | "Exepected fixed header length = %" PRIu8 |
1633 | " but got %" PRIu8, | |
1634 | expected_length, length); | |
88f9d911 CF |
1635 | return ISIS_ERROR; |
1636 | } | |
1637 | ||
1638 | if (stream_get_endp(circuit->rcv_stream) < length) { | |
af4c2728 | 1639 | flog_err( |
1a7ecb96 | 1640 | EC_ISIS_PACKET, |
88f9d911 | 1641 | "PDU is too short to contain fixed header of given PDU type."); |
d62a17ae | 1642 | return ISIS_ERROR; |
1643 | } | |
eb5d44eb | 1644 | |
88f9d911 CF |
1645 | if (version2 != 1) { |
1646 | zlog_warn("Unsupported ISIS PDU version %" PRIu8, version2); | |
0532bd84 EDP |
1647 | #ifndef FABRICD |
1648 | /* send northbound notification */ | |
1649 | isis_notif_version_skew(circuit, version2, raw_pdu); | |
1650 | #endif /* ifndef FABRICD */ | |
d62a17ae | 1651 | return ISIS_WARNING; |
1652 | } | |
3f045a08 | 1653 | |
d62a17ae | 1654 | if (circuit->is_passive) { |
1655 | zlog_warn("Received ISIS PDU on passive circuit %s", | |
1656 | circuit->interface->name); | |
1657 | return ISIS_WARNING; | |
1658 | } | |
3f045a08 | 1659 | |
d62a17ae | 1660 | /* either 3 or 0 */ |
1cbd5b37 CF |
1661 | if (pdu_type != FS_LINK_STATE /* FS PDU doesn't contain max area addr field */ |
1662 | && max_area_addrs != 0 | |
1663 | && max_area_addrs != isis->max_area_addrs) { | |
af4c2728 | 1664 | flog_err( |
1a7ecb96 | 1665 | EC_ISIS_PACKET, |
88f9d911 CF |
1666 | "maximumAreaAddressesMismatch: maximumAreaAdresses in a received PDU %" PRIu8 |
1667 | " while the parameter for this IS is %u", | |
1668 | max_area_addrs, isis->max_area_addrs); | |
2ab5a2d1 EDP |
1669 | #ifndef FABRICD |
1670 | /* send northbound notification */ | |
1671 | isis_notif_max_area_addr_mismatch(circuit, max_area_addrs, | |
1672 | raw_pdu); | |
1673 | #endif /* ifndef FABRICD */ | |
d62a17ae | 1674 | return ISIS_ERROR; |
1675 | } | |
eb5d44eb | 1676 | |
88f9d911 | 1677 | switch (pdu_type) { |
d62a17ae | 1678 | case L1_LAN_HELLO: |
d62a17ae | 1679 | case L2_LAN_HELLO: |
d62a17ae | 1680 | case P2P_HELLO: |
a2d41bb0 CF |
1681 | if (fabricd && pdu_type != P2P_HELLO) |
1682 | return ISIS_ERROR; | |
0c1bd758 | 1683 | retval = process_hello(pdu_type, circuit, ssnpa); |
d62a17ae | 1684 | break; |
1685 | case L1_LINK_STATE: | |
d62a17ae | 1686 | case L2_LINK_STATE: |
1cbd5b37 | 1687 | case FS_LINK_STATE: |
a2d41bb0 CF |
1688 | if (fabricd |
1689 | && pdu_type != L2_LINK_STATE | |
1690 | && pdu_type != FS_LINK_STATE) | |
1691 | return ISIS_ERROR; | |
9b39405f | 1692 | retval = process_lsp(pdu_type, circuit, ssnpa, max_area_addrs); |
d62a17ae | 1693 | break; |
1694 | case L1_COMPLETE_SEQ_NUM: | |
d62a17ae | 1695 | case L2_COMPLETE_SEQ_NUM: |
d62a17ae | 1696 | case L1_PARTIAL_SEQ_NUM: |
d62a17ae | 1697 | case L2_PARTIAL_SEQ_NUM: |
17c9dcd5 | 1698 | retval = process_snp(pdu_type, circuit, ssnpa); |
d62a17ae | 1699 | break; |
1700 | default: | |
1701 | return ISIS_ERROR; | |
1702 | } | |
eb5d44eb | 1703 | |
d62a17ae | 1704 | return retval; |
eb5d44eb | 1705 | } |
1706 | ||
d62a17ae | 1707 | int isis_receive(struct thread *thread) |
eb5d44eb | 1708 | { |
d62a17ae | 1709 | struct isis_circuit *circuit; |
d7c0a89a | 1710 | uint8_t ssnpa[ETH_ALEN]; |
d62a17ae | 1711 | int retval; |
eb5d44eb | 1712 | |
d62a17ae | 1713 | /* |
1714 | * Get the circuit | |
1715 | */ | |
1716 | circuit = THREAD_ARG(thread); | |
1717 | assert(circuit); | |
eb5d44eb | 1718 | |
d62a17ae | 1719 | circuit->t_read = NULL; |
eb5d44eb | 1720 | |
d62a17ae | 1721 | isis_circuit_stream(circuit, &circuit->rcv_stream); |
eb5d44eb | 1722 | |
d62a17ae | 1723 | retval = circuit->rx(circuit, ssnpa); |
eb5d44eb | 1724 | |
b9347997 | 1725 | #if ISIS_METHOD != ISIS_METHOD_BPF |
d62a17ae | 1726 | if (retval == ISIS_OK) |
1727 | retval = isis_handle_pdu(circuit, ssnpa); | |
b9347997 | 1728 | #endif //ISIS_METHOD != ISIS_METHOD_BPF |
eb5d44eb | 1729 | |
d62a17ae | 1730 | /* |
1731 | * prepare for next packet. | |
1732 | */ | |
1733 | if (!circuit->is_passive) | |
1734 | isis_circuit_prepare(circuit); | |
eb5d44eb | 1735 | |
d62a17ae | 1736 | return retval; |
eb5d44eb | 1737 | } |
1738 | ||
eb5d44eb | 1739 | /* |
d62a17ae | 1740 | * SEND SIDE |
eb5d44eb | 1741 | */ |
88f9d911 | 1742 | void fill_fixed_hdr(uint8_t pdu_type, struct stream *stream) |
eb5d44eb | 1743 | { |
88f9d911 CF |
1744 | uint8_t length; |
1745 | ||
1746 | if (pdu_size(pdu_type, &length)) | |
1747 | assert(!"Unknown PDU Type"); | |
1748 | ||
1749 | stream_putc(stream, ISO10589_ISIS); /* IDRP */ | |
1750 | stream_putc(stream, length); /* Length of fixed header */ | |
1751 | stream_putc(stream, 1); /* Version/Protocol ID Extension 1 */ | |
1752 | stream_putc(stream, 0); /* ID Length, 0 => 6 */ | |
1753 | stream_putc(stream, pdu_type); | |
1754 | stream_putc(stream, 1); /* Subversion */ | |
1755 | stream_putc(stream, 0); /* Reserved */ | |
1756 | stream_putc(stream, 0); /* Max Area Addresses 0 => 3 */ | |
eb5d44eb | 1757 | } |
1758 | ||
39bb53d6 | 1759 | static uint8_t hello_pdu_type(struct isis_circuit *circuit, int level) |
eb5d44eb | 1760 | { |
d62a17ae | 1761 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) |
39bb53d6 | 1762 | return (level == IS_LEVEL_1) ? L1_LAN_HELLO : L2_LAN_HELLO; |
d62a17ae | 1763 | else |
39bb53d6 CF |
1764 | return P2P_HELLO; |
1765 | } | |
1766 | ||
1767 | static void put_hello_hdr(struct isis_circuit *circuit, int level, | |
1768 | size_t *len_pointer) | |
1769 | { | |
1770 | uint8_t pdu_type = hello_pdu_type(circuit, level); | |
88f9d911 | 1771 | |
0c1bd758 | 1772 | isis_circuit_stream(circuit, &circuit->snd_stream); |
88f9d911 | 1773 | fill_fixed_hdr(pdu_type, circuit->snd_stream); |
d62a17ae | 1774 | |
0c1bd758 CF |
1775 | stream_putc(circuit->snd_stream, circuit->is_type); |
1776 | stream_put(circuit->snd_stream, circuit->area->isis->sysid, | |
1777 | ISIS_SYS_ID_LEN); | |
eb5d44eb | 1778 | |
0c1bd758 CF |
1779 | uint32_t holdtime = circuit->hello_multiplier[level - 1] |
1780 | * circuit->hello_interval[level - 1]; | |
d62a17ae | 1781 | |
0c1bd758 CF |
1782 | if (holdtime > 0xffff) |
1783 | holdtime = 0xffff; | |
d62a17ae | 1784 | |
0c1bd758 CF |
1785 | stream_putw(circuit->snd_stream, holdtime); |
1786 | *len_pointer = stream_get_endp(circuit->snd_stream); | |
1787 | stream_putw(circuit->snd_stream, 0); /* length is filled in later */ | |
d62a17ae | 1788 | |
0c1bd758 | 1789 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) { |
d7c0a89a QY |
1790 | uint8_t *desig_is = (level == IS_LEVEL_1) |
1791 | ? circuit->u.bc.l1_desig_is | |
1792 | : circuit->u.bc.l2_desig_is; | |
0c1bd758 CF |
1793 | stream_putc(circuit->snd_stream, circuit->priority[level - 1]); |
1794 | stream_put(circuit->snd_stream, desig_is, ISIS_SYS_ID_LEN + 1); | |
1795 | } else { | |
1796 | stream_putc(circuit->snd_stream, circuit->circuit_id); | |
d62a17ae | 1797 | } |
0c1bd758 | 1798 | } |
eb5d44eb | 1799 | |
0c1bd758 CF |
1800 | int send_hello(struct isis_circuit *circuit, int level) |
1801 | { | |
1802 | size_t len_pointer; | |
1803 | int retval; | |
1804 | ||
1805 | if (circuit->is_passive) | |
1806 | return ISIS_OK; | |
1807 | ||
1808 | if (circuit->interface->mtu == 0) { | |
1809 | zlog_warn("circuit has zero MTU"); | |
d62a17ae | 1810 | return ISIS_WARNING; |
0c1bd758 CF |
1811 | } |
1812 | ||
1813 | put_hello_hdr(circuit, level, &len_pointer); | |
1814 | ||
1815 | struct isis_tlvs *tlvs = isis_alloc_tlvs(); | |
1816 | ||
1817 | isis_tlvs_add_auth(tlvs, &circuit->passwd); | |
1818 | ||
a3acf37d DS |
1819 | if (!listcount(circuit->area->area_addrs)) { |
1820 | isis_free_tlvs(tlvs); | |
d62a17ae | 1821 | return ISIS_WARNING; |
a3acf37d DS |
1822 | } |
1823 | ||
0c1bd758 | 1824 | isis_tlvs_add_area_addresses(tlvs, circuit->area->area_addrs); |
d62a17ae | 1825 | |
42fe2621 | 1826 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) { |
0c1bd758 CF |
1827 | isis_tlvs_add_lan_neighbors( |
1828 | tlvs, circuit->u.bc.lan_neighs[level - 1]); | |
58e5d748 CF |
1829 | } else if (circuit->circ_type == CIRCUIT_T_P2P |
1830 | && !circuit->disable_threeway_adj) { | |
42fe2621 CF |
1831 | uint32_t ext_circuit_id = circuit->idx; |
1832 | if (circuit->u.p2p.neighbor) { | |
8e6fb83b CF |
1833 | uint8_t threeway_state; |
1834 | ||
1835 | if (fabricd_initial_sync_is_in_progress(circuit->area) | |
1836 | && fabricd_initial_sync_circuit(circuit->area) != circuit) | |
1837 | threeway_state = ISIS_THREEWAY_DOWN; | |
1838 | else | |
1839 | threeway_state = circuit->u.p2p.neighbor->threeway_state; | |
42fe2621 | 1840 | isis_tlvs_add_threeway_adj(tlvs, |
8e6fb83b | 1841 | threeway_state, |
42fe2621 CF |
1842 | ext_circuit_id, |
1843 | circuit->u.p2p.neighbor->sysid, | |
1844 | circuit->u.p2p.neighbor->ext_circuit_id); | |
1845 | } else { | |
1846 | isis_tlvs_add_threeway_adj(tlvs, | |
1847 | ISIS_THREEWAY_DOWN, | |
1848 | ext_circuit_id, | |
1849 | NULL, 0); | |
1850 | } | |
1851 | } | |
0c1bd758 CF |
1852 | |
1853 | isis_tlvs_set_protocols_supported(tlvs, &circuit->nlpids); | |
d62a17ae | 1854 | |
1855 | /* | |
1856 | * MT Supported TLV | |
1857 | * | |
1858 | * TLV gets included if no topology is enabled on the interface, | |
1859 | * if one topology other than #0 is enabled, or if multiple topologies | |
1860 | * are enabled. | |
1861 | */ | |
1862 | struct isis_circuit_mt_setting **mt_settings; | |
1863 | unsigned int mt_count; | |
1864 | ||
1865 | mt_settings = circuit_mt_settings(circuit, &mt_count); | |
0c1bd758 CF |
1866 | if (mt_count == 0 && area_is_mt(circuit->area)) { |
1867 | tlvs->mt_router_info_empty = true; | |
1868 | } else if ((mt_count == 1 | |
1869 | && mt_settings[0]->mtid != ISIS_MT_IPV4_UNICAST) | |
1870 | || (mt_count > 1)) { | |
1871 | for (unsigned int i = 0; i < mt_count; i++) | |
1872 | isis_tlvs_add_mt_router_info(tlvs, mt_settings[i]->mtid, | |
1873 | false, false); | |
d62a17ae | 1874 | } |
eb5d44eb | 1875 | |
41415888 CF |
1876 | if (circuit->ip_router) { |
1877 | struct list *circuit_ip_addrs = fabricd_ip_addrs(circuit); | |
1878 | ||
1879 | if (circuit_ip_addrs) | |
1880 | isis_tlvs_add_ipv4_addresses(tlvs, circuit_ip_addrs); | |
1881 | } | |
d62a17ae | 1882 | |
0c1bd758 CF |
1883 | if (circuit->ipv6_router && circuit->ipv6_link) |
1884 | isis_tlvs_add_ipv6_addresses(tlvs, circuit->ipv6_link); | |
d62a17ae | 1885 | |
0c1bd758 | 1886 | if (isis_pack_tlvs(tlvs, circuit->snd_stream, len_pointer, |
af8ac8f9 | 1887 | circuit->pad_hellos, false)) { |
0c1bd758 CF |
1888 | isis_free_tlvs(tlvs); |
1889 | return ISIS_WARNING; /* XXX: Maybe Log TLV structure? */ | |
f390d2c7 | 1890 | } |
d62a17ae | 1891 | |
1892 | if (isis->debugs & DEBUG_ADJ_PACKETS) { | |
1893 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) { | |
1894 | zlog_debug( | |
1895 | "ISIS-Adj (%s): Sending L%d LAN IIH on %s, length %zd", | |
1896 | circuit->area->area_tag, level, | |
0c1bd758 CF |
1897 | circuit->interface->name, |
1898 | stream_get_endp(circuit->snd_stream)); | |
d62a17ae | 1899 | } else { |
1900 | zlog_debug( | |
1901 | "ISIS-Adj (%s): Sending P2P IIH on %s, length %zd", | |
1902 | circuit->area->area_tag, | |
0c1bd758 CF |
1903 | circuit->interface->name, |
1904 | stream_get_endp(circuit->snd_stream)); | |
d62a17ae | 1905 | } |
1906 | if (isis->debugs & DEBUG_PACKET_DUMP) | |
1907 | zlog_dump_data(STREAM_DATA(circuit->snd_stream), | |
1908 | stream_get_endp(circuit->snd_stream)); | |
f390d2c7 | 1909 | } |
eb5d44eb | 1910 | |
0c1bd758 CF |
1911 | isis_free_tlvs(tlvs); |
1912 | ||
89cdc4df RM |
1913 | pdu_counter_count(circuit->area->pdu_tx_counters, |
1914 | hello_pdu_type(circuit, level)); | |
d62a17ae | 1915 | retval = circuit->tx(circuit, level); |
1916 | if (retval != ISIS_OK) | |
1a7ecb96 | 1917 | flog_err(EC_ISIS_PACKET, |
1c50c1c0 QY |
1918 | "ISIS-Adj (%s): Send L%d IIH on %s failed", |
1919 | circuit->area->area_tag, level, | |
1920 | circuit->interface->name); | |
eb5d44eb | 1921 | |
d62a17ae | 1922 | return retval; |
eb5d44eb | 1923 | } |
1924 | ||
a0a707ee | 1925 | static int send_hello_cb(struct thread *thread) |
eb5d44eb | 1926 | { |
7c4f7aab | 1927 | struct isis_circuit_arg *arg = THREAD_ARG(thread); |
7c4f7aab | 1928 | assert(arg); |
89cdc4df | 1929 | |
7c4f7aab CF |
1930 | struct isis_circuit *circuit = arg->circuit; |
1931 | int level = arg->level; | |
d62a17ae | 1932 | |
d62a17ae | 1933 | assert(circuit); |
ddfdbd32 | 1934 | |
7c4f7aab CF |
1935 | if (circuit->circ_type == CIRCUIT_T_P2P) { |
1936 | circuit->u.p2p.t_send_p2p_hello = NULL; | |
7c4f7aab | 1937 | send_hello(circuit, 1); |
a0a707ee CF |
1938 | send_hello_sched(circuit, ISIS_LEVEL1, |
1939 | 1000 * circuit->hello_interval[1]); | |
7c4f7aab | 1940 | return ISIS_OK; |
d62a17ae | 1941 | } |
ddfdbd32 | 1942 | |
7c4f7aab CF |
1943 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) { |
1944 | zlog_warn("ISIS-Hello (%s): Trying to send hello on unknown circuit type %d", | |
1945 | circuit->area->area_tag, circuit->circ_type); | |
1946 | return ISIS_WARNING; | |
1947 | } | |
eb5d44eb | 1948 | |
7c4f7aab CF |
1949 | circuit->u.bc.t_send_lan_hello[level - 1] = NULL; |
1950 | if (!(circuit->is_type & level)) { | |
1951 | zlog_warn("ISIS-Hello (%s): Trying to send L%d IIH in L%d-only circuit", | |
1952 | circuit->area->area_tag, level, 3 - level); | |
1953 | return ISIS_WARNING; | |
1954 | } | |
eb5d44eb | 1955 | |
7c4f7aab CF |
1956 | if (circuit->u.bc.run_dr_elect[level - 1]) |
1957 | isis_dr_elect(circuit, level); | |
eb5d44eb | 1958 | |
7c4f7aab | 1959 | int rv = send_hello(circuit, level); |
eb5d44eb | 1960 | |
d62a17ae | 1961 | /* set next timer thread */ |
a0a707ee | 1962 | send_hello_sched(circuit, level, 1000 * circuit->hello_interval[level - 1]); |
7c4f7aab | 1963 | return rv; |
eb5d44eb | 1964 | } |
1965 | ||
a0a707ee CF |
1966 | static void _send_hello_sched(struct isis_circuit *circuit, |
1967 | struct thread **threadp, | |
1968 | int level, long delay) | |
1969 | { | |
1970 | if (*threadp) { | |
1971 | if (thread_timer_remain_msec(*threadp) < (unsigned long)delay) | |
1972 | return; | |
1973 | ||
1974 | thread_cancel(*threadp); | |
1975 | } | |
1976 | ||
1977 | thread_add_timer_msec(master, send_hello_cb, | |
1978 | &circuit->level_arg[level - 1], | |
1979 | isis_jitter(delay, IIH_JITTER), | |
1980 | threadp); | |
1981 | } | |
1982 | ||
1983 | void send_hello_sched(struct isis_circuit *circuit, int level, long delay) | |
1984 | { | |
1985 | if (circuit->circ_type == CIRCUIT_T_P2P) { | |
1986 | _send_hello_sched(circuit, &circuit->u.p2p.t_send_p2p_hello, | |
1987 | ISIS_LEVEL1, delay); | |
1988 | return; | |
1989 | } | |
1990 | ||
1991 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) { | |
1992 | zlog_warn("%s: encountered unknown circuit type %d on %s", | |
1993 | __func__, circuit->circ_type, | |
1994 | circuit->interface->name); | |
1995 | return; | |
1996 | } | |
1997 | ||
1998 | for (int loop_level = ISIS_LEVEL1; loop_level <= ISIS_LEVEL2; loop_level++) { | |
1999 | if (!(loop_level & level)) | |
2000 | continue; | |
2001 | ||
2002 | _send_hello_sched( | |
2003 | circuit, | |
2004 | &circuit->u.bc.t_send_lan_hello[loop_level - 1], | |
2005 | loop_level, | |
2006 | delay | |
2007 | ); | |
2008 | } | |
2009 | } | |
2010 | ||
2011 | ||
3f045a08 JB |
2012 | /* |
2013 | * Count the maximum number of lsps that can be accomodated by a given size. | |
2014 | */ | |
af8ac8f9 | 2015 | #define LSP_ENTRIES_LEN (10 + ISIS_SYS_ID_LEN) |
d62a17ae | 2016 | static uint16_t get_max_lsp_count(uint16_t size) |
3f045a08 | 2017 | { |
d62a17ae | 2018 | uint16_t tlv_count; |
2019 | uint16_t lsp_count; | |
2020 | uint16_t remaining_size; | |
3f045a08 | 2021 | |
d62a17ae | 2022 | /* First count the full size TLVs */ |
2023 | tlv_count = size / MAX_LSP_ENTRIES_TLV_SIZE; | |
2024 | lsp_count = tlv_count * (MAX_LSP_ENTRIES_TLV_SIZE / LSP_ENTRIES_LEN); | |
3f045a08 | 2025 | |
d62a17ae | 2026 | /* The last TLV, if any */ |
2027 | remaining_size = size % MAX_LSP_ENTRIES_TLV_SIZE; | |
2028 | if (remaining_size - 2 >= LSP_ENTRIES_LEN) | |
2029 | lsp_count += (remaining_size - 2) / LSP_ENTRIES_LEN; | |
3f045a08 | 2030 | |
d62a17ae | 2031 | return lsp_count; |
3f045a08 JB |
2032 | } |
2033 | ||
17c9dcd5 | 2034 | int send_csnp(struct isis_circuit *circuit, int level) |
3f045a08 | 2035 | { |
17c9dcd5 CF |
2036 | if (circuit->area->lspdb[level - 1] == NULL |
2037 | || dict_count(circuit->area->lspdb[level - 1]) == 0) | |
2038 | return ISIS_OK; | |
d62a17ae | 2039 | |
39bb53d6 CF |
2040 | uint8_t pdu_type = (level == ISIS_LEVEL1) ? L1_COMPLETE_SEQ_NUM |
2041 | : L2_COMPLETE_SEQ_NUM; | |
2042 | ||
17c9dcd5 | 2043 | isis_circuit_stream(circuit, &circuit->snd_stream); |
39bb53d6 | 2044 | fill_fixed_hdr(pdu_type, circuit->snd_stream); |
3f045a08 | 2045 | |
17c9dcd5 CF |
2046 | size_t len_pointer = stream_get_endp(circuit->snd_stream); |
2047 | stream_putw(circuit->snd_stream, 0); | |
2048 | stream_put(circuit->snd_stream, isis->sysid, ISIS_SYS_ID_LEN); | |
2049 | /* with zero circuit id - ref 9.10, 9.11 */ | |
2050 | stream_putc(circuit->snd_stream, 0); | |
3f045a08 | 2051 | |
17c9dcd5 CF |
2052 | size_t start_pointer = stream_get_endp(circuit->snd_stream); |
2053 | stream_put(circuit->snd_stream, 0, ISIS_SYS_ID_LEN + 2); | |
2054 | size_t end_pointer = stream_get_endp(circuit->snd_stream); | |
2055 | stream_put(circuit->snd_stream, 0, ISIS_SYS_ID_LEN + 2); | |
d62a17ae | 2056 | |
17c9dcd5 CF |
2057 | struct isis_passwd *passwd = (level == ISIS_LEVEL1) |
2058 | ? &circuit->area->area_passwd | |
2059 | : &circuit->area->domain_passwd; | |
d62a17ae | 2060 | |
17c9dcd5 | 2061 | struct isis_tlvs *tlvs = isis_alloc_tlvs(); |
3f045a08 | 2062 | |
17c9dcd5 CF |
2063 | if (CHECK_FLAG(passwd->snp_auth, SNP_AUTH_SEND)) |
2064 | isis_tlvs_add_auth(tlvs, passwd); | |
eb5d44eb | 2065 | |
17c9dcd5 | 2066 | size_t tlv_start = stream_get_endp(circuit->snd_stream); |
af8ac8f9 CF |
2067 | if (isis_pack_tlvs(tlvs, circuit->snd_stream, len_pointer, false, |
2068 | false)) { | |
17c9dcd5 CF |
2069 | isis_free_tlvs(tlvs); |
2070 | return ISIS_WARNING; | |
2071 | } | |
2072 | isis_free_tlvs(tlvs); | |
d62a17ae | 2073 | |
17c9dcd5 CF |
2074 | uint16_t num_lsps = |
2075 | get_max_lsp_count(STREAM_WRITEABLE(circuit->snd_stream)); | |
d62a17ae | 2076 | |
17c9dcd5 | 2077 | uint8_t start[ISIS_SYS_ID_LEN + 2]; |
d62a17ae | 2078 | memset(start, 0x00, ISIS_SYS_ID_LEN + 2); |
17c9dcd5 | 2079 | uint8_t stop[ISIS_SYS_ID_LEN + 2]; |
d62a17ae | 2080 | memset(stop, 0xff, ISIS_SYS_ID_LEN + 2); |
2081 | ||
17c9dcd5 | 2082 | bool loop = true; |
d62a17ae | 2083 | while (loop) { |
17c9dcd5 CF |
2084 | tlvs = isis_alloc_tlvs(); |
2085 | if (CHECK_FLAG(passwd->snp_auth, SNP_AUTH_SEND)) | |
2086 | isis_tlvs_add_auth(tlvs, passwd); | |
2087 | ||
2088 | struct isis_lsp *last_lsp; | |
2089 | isis_tlvs_add_csnp_entries(tlvs, start, stop, num_lsps, | |
2090 | circuit->area->lspdb[level - 1], | |
2091 | &last_lsp); | |
d62a17ae | 2092 | /* |
2093 | * Update the stop lsp_id before encoding this CSNP. | |
2094 | */ | |
17c9dcd5 | 2095 | if (tlvs->lsp_entries.count < num_lsps) { |
d62a17ae | 2096 | memset(stop, 0xff, ISIS_SYS_ID_LEN + 2); |
2097 | } else { | |
af8ac8f9 | 2098 | memcpy(stop, last_lsp->hdr.lsp_id, sizeof(stop)); |
d62a17ae | 2099 | } |
3f045a08 | 2100 | |
17c9dcd5 CF |
2101 | memcpy(STREAM_DATA(circuit->snd_stream) + start_pointer, start, |
2102 | ISIS_SYS_ID_LEN + 2); | |
2103 | memcpy(STREAM_DATA(circuit->snd_stream) + end_pointer, stop, | |
2104 | ISIS_SYS_ID_LEN + 2); | |
2105 | stream_set_endp(circuit->snd_stream, tlv_start); | |
2106 | if (isis_pack_tlvs(tlvs, circuit->snd_stream, len_pointer, | |
af8ac8f9 | 2107 | false, false)) { |
17c9dcd5 CF |
2108 | isis_free_tlvs(tlvs); |
2109 | return ISIS_WARNING; | |
d62a17ae | 2110 | } |
eb5d44eb | 2111 | |
d62a17ae | 2112 | if (isis->debugs & DEBUG_SNP_PACKETS) { |
2113 | zlog_debug( | |
2114 | "ISIS-Snp (%s): Sending L%d CSNP on %s, length %zd", | |
2115 | circuit->area->area_tag, level, | |
2116 | circuit->interface->name, | |
2117 | stream_get_endp(circuit->snd_stream)); | |
17c9dcd5 CF |
2118 | log_multiline(LOG_DEBUG, " ", "%s", |
2119 | isis_format_tlvs(tlvs)); | |
d62a17ae | 2120 | if (isis->debugs & DEBUG_PACKET_DUMP) |
2121 | zlog_dump_data( | |
2122 | STREAM_DATA(circuit->snd_stream), | |
2123 | stream_get_endp(circuit->snd_stream)); | |
2124 | } | |
eb5d44eb | 2125 | |
39bb53d6 | 2126 | pdu_counter_count(circuit->area->pdu_tx_counters, pdu_type); |
17c9dcd5 | 2127 | int retval = circuit->tx(circuit, level); |
d62a17ae | 2128 | if (retval != ISIS_OK) { |
1a7ecb96 | 2129 | flog_err(EC_ISIS_PACKET, |
1c50c1c0 QY |
2130 | "ISIS-Snp (%s): Send L%d CSNP on %s failed", |
2131 | circuit->area->area_tag, level, | |
2132 | circuit->interface->name); | |
17c9dcd5 | 2133 | isis_free_tlvs(tlvs); |
d62a17ae | 2134 | return retval; |
2135 | } | |
3f045a08 | 2136 | |
d62a17ae | 2137 | /* |
2138 | * Start lsp_id of the next CSNP should be one plus the | |
2139 | * stop lsp_id in this current CSNP. | |
2140 | */ | |
2141 | memcpy(start, stop, ISIS_SYS_ID_LEN + 2); | |
2142 | loop = 0; | |
17c9dcd5 | 2143 | for (int i = ISIS_SYS_ID_LEN + 1; i >= 0; --i) { |
d7c0a89a | 2144 | if (start[i] < (uint8_t)0xff) { |
d62a17ae | 2145 | start[i] += 1; |
2146 | loop = 1; | |
2147 | break; | |
2148 | } | |
2149 | } | |
2150 | memset(stop, 0xff, ISIS_SYS_ID_LEN + 2); | |
17c9dcd5 | 2151 | isis_free_tlvs(tlvs); |
d62a17ae | 2152 | } |
3f045a08 | 2153 | |
17c9dcd5 | 2154 | return ISIS_OK; |
eb5d44eb | 2155 | } |
2156 | ||
d62a17ae | 2157 | int send_l1_csnp(struct thread *thread) |
eb5d44eb | 2158 | { |
d62a17ae | 2159 | struct isis_circuit *circuit; |
2160 | int retval = ISIS_OK; | |
eb5d44eb | 2161 | |
d62a17ae | 2162 | circuit = THREAD_ARG(thread); |
2163 | assert(circuit); | |
eb5d44eb | 2164 | |
d62a17ae | 2165 | circuit->t_send_csnp[0] = NULL; |
eb5d44eb | 2166 | |
8e6fb83b CF |
2167 | if ((circuit->circ_type == CIRCUIT_T_BROADCAST |
2168 | && circuit->u.bc.is_dr[0]) | |
2169 | || circuit->circ_type == CIRCUIT_T_P2P) { | |
d62a17ae | 2170 | send_csnp(circuit, 1); |
2171 | } | |
2172 | /* set next timer thread */ | |
2173 | thread_add_timer(master, send_l1_csnp, circuit, | |
2174 | isis_jitter(circuit->csnp_interval[0], CSNP_JITTER), | |
2175 | &circuit->t_send_csnp[0]); | |
eb5d44eb | 2176 | |
d62a17ae | 2177 | return retval; |
eb5d44eb | 2178 | } |
2179 | ||
d62a17ae | 2180 | int send_l2_csnp(struct thread *thread) |
eb5d44eb | 2181 | { |
d62a17ae | 2182 | struct isis_circuit *circuit; |
2183 | int retval = ISIS_OK; | |
eb5d44eb | 2184 | |
d62a17ae | 2185 | circuit = THREAD_ARG(thread); |
2186 | assert(circuit); | |
eb5d44eb | 2187 | |
d62a17ae | 2188 | circuit->t_send_csnp[1] = NULL; |
eb5d44eb | 2189 | |
8e6fb83b CF |
2190 | if ((circuit->circ_type == CIRCUIT_T_BROADCAST |
2191 | && circuit->u.bc.is_dr[1]) | |
2192 | || circuit->circ_type == CIRCUIT_T_P2P) { | |
d62a17ae | 2193 | send_csnp(circuit, 2); |
2194 | } | |
2195 | /* set next timer thread */ | |
2196 | thread_add_timer(master, send_l2_csnp, circuit, | |
2197 | isis_jitter(circuit->csnp_interval[1], CSNP_JITTER), | |
2198 | &circuit->t_send_csnp[1]); | |
d70f99e1 | 2199 | |
d62a17ae | 2200 | return retval; |
eb5d44eb | 2201 | } |
2202 | ||
eb5d44eb | 2203 | /* |
2204 | * 7.3.15.4 action on expiration of partial SNP interval | |
2205 | * level 1 | |
2206 | */ | |
d62a17ae | 2207 | static int send_psnp(int level, struct isis_circuit *circuit) |
eb5d44eb | 2208 | { |
d62a17ae | 2209 | if (circuit->circ_type == CIRCUIT_T_BROADCAST |
2210 | && circuit->u.bc.is_dr[level - 1]) | |
2211 | return ISIS_OK; | |
eb5d44eb | 2212 | |
d62a17ae | 2213 | if (circuit->area->lspdb[level - 1] == NULL |
2214 | || dict_count(circuit->area->lspdb[level - 1]) == 0) | |
2215 | return ISIS_OK; | |
f390d2c7 | 2216 | |
d62a17ae | 2217 | if (!circuit->snd_stream) |
2218 | return ISIS_ERROR; | |
e38e0df0 | 2219 | |
39bb53d6 CF |
2220 | uint8_t pdu_type = (level == ISIS_LEVEL1) ? L1_PARTIAL_SEQ_NUM |
2221 | : L2_PARTIAL_SEQ_NUM; | |
2222 | ||
17c9dcd5 | 2223 | isis_circuit_stream(circuit, &circuit->snd_stream); |
39bb53d6 | 2224 | fill_fixed_hdr(pdu_type, circuit->snd_stream); |
17c9dcd5 CF |
2225 | |
2226 | size_t len_pointer = stream_get_endp(circuit->snd_stream); | |
2227 | stream_putw(circuit->snd_stream, 0); /* length is filled in later */ | |
2228 | stream_put(circuit->snd_stream, isis->sysid, ISIS_SYS_ID_LEN); | |
2229 | stream_putc(circuit->snd_stream, circuit->idx); | |
2230 | ||
2231 | struct isis_passwd *passwd = (level == ISIS_LEVEL1) | |
2232 | ? &circuit->area->area_passwd | |
2233 | : &circuit->area->domain_passwd; | |
2234 | ||
2235 | struct isis_tlvs *tlvs = isis_alloc_tlvs(); | |
2236 | ||
2237 | if (CHECK_FLAG(passwd->snp_auth, SNP_AUTH_SEND)) | |
2238 | isis_tlvs_add_auth(tlvs, passwd); | |
2239 | ||
2240 | size_t tlv_start = stream_get_endp(circuit->snd_stream); | |
af8ac8f9 CF |
2241 | if (isis_pack_tlvs(tlvs, circuit->snd_stream, len_pointer, false, |
2242 | false)) { | |
17c9dcd5 CF |
2243 | isis_free_tlvs(tlvs); |
2244 | return ISIS_WARNING; | |
2245 | } | |
2246 | isis_free_tlvs(tlvs); | |
2247 | ||
2248 | uint16_t num_lsps = | |
2249 | get_max_lsp_count(STREAM_WRITEABLE(circuit->snd_stream)); | |
f390d2c7 | 2250 | |
d62a17ae | 2251 | while (1) { |
17c9dcd5 CF |
2252 | tlvs = isis_alloc_tlvs(); |
2253 | if (CHECK_FLAG(passwd->snp_auth, SNP_AUTH_SEND)) | |
2254 | isis_tlvs_add_auth(tlvs, passwd); | |
2255 | ||
2256 | for (dnode_t *dnode = | |
2257 | dict_first(circuit->area->lspdb[level - 1]); | |
2258 | dnode; dnode = dict_next(circuit->area->lspdb[level - 1], | |
2259 | dnode)) { | |
2260 | struct isis_lsp *lsp = dnode_get(dnode); | |
2261 | ||
2262 | if (ISIS_CHECK_FLAG(lsp->SSNflags, circuit)) | |
2263 | isis_tlvs_add_lsp_entry(tlvs, lsp); | |
eb5d44eb | 2264 | |
17c9dcd5 CF |
2265 | if (tlvs->lsp_entries.count == num_lsps) |
2266 | break; | |
2267 | } | |
2268 | ||
2269 | if (!tlvs->lsp_entries.count) { | |
2270 | isis_free_tlvs(tlvs); | |
d62a17ae | 2271 | return ISIS_OK; |
2272 | } | |
2273 | ||
17c9dcd5 CF |
2274 | stream_set_endp(circuit->snd_stream, tlv_start); |
2275 | if (isis_pack_tlvs(tlvs, circuit->snd_stream, len_pointer, | |
af8ac8f9 | 2276 | false, false)) { |
17c9dcd5 CF |
2277 | isis_free_tlvs(tlvs); |
2278 | return ISIS_WARNING; | |
d62a17ae | 2279 | } |
2280 | ||
2281 | if (isis->debugs & DEBUG_SNP_PACKETS) { | |
2282 | zlog_debug( | |
2283 | "ISIS-Snp (%s): Sending L%d PSNP on %s, length %zd", | |
2284 | circuit->area->area_tag, level, | |
2285 | circuit->interface->name, | |
2286 | stream_get_endp(circuit->snd_stream)); | |
17c9dcd5 CF |
2287 | log_multiline(LOG_DEBUG, " ", "%s", |
2288 | isis_format_tlvs(tlvs)); | |
d62a17ae | 2289 | if (isis->debugs & DEBUG_PACKET_DUMP) |
2290 | zlog_dump_data( | |
2291 | STREAM_DATA(circuit->snd_stream), | |
2292 | stream_get_endp(circuit->snd_stream)); | |
2293 | } | |
2294 | ||
39bb53d6 | 2295 | pdu_counter_count(circuit->area->pdu_tx_counters, pdu_type); |
17c9dcd5 | 2296 | int retval = circuit->tx(circuit, level); |
d62a17ae | 2297 | if (retval != ISIS_OK) { |
1a7ecb96 | 2298 | flog_err(EC_ISIS_PACKET, |
1c50c1c0 QY |
2299 | "ISIS-Snp (%s): Send L%d PSNP on %s failed", |
2300 | circuit->area->area_tag, level, | |
2301 | circuit->interface->name); | |
17c9dcd5 | 2302 | isis_free_tlvs(tlvs); |
d62a17ae | 2303 | return retval; |
2304 | } | |
2305 | ||
2306 | /* | |
2307 | * sending succeeded, we can clear SSN flags of this circuit | |
2308 | * for the LSPs in list | |
2309 | */ | |
17c9dcd5 CF |
2310 | struct isis_lsp_entry *entry_head; |
2311 | entry_head = (struct isis_lsp_entry *)tlvs->lsp_entries.head; | |
2312 | for (struct isis_lsp_entry *entry = entry_head; entry; | |
2313 | entry = entry->next) | |
2314 | ISIS_CLEAR_FLAG(entry->lsp->SSNflags, circuit); | |
2315 | isis_free_tlvs(tlvs); | |
d62a17ae | 2316 | } |
2317 | ||
17c9dcd5 | 2318 | return ISIS_OK; |
eb5d44eb | 2319 | } |
2320 | ||
d62a17ae | 2321 | int send_l1_psnp(struct thread *thread) |
eb5d44eb | 2322 | { |
2323 | ||
d62a17ae | 2324 | struct isis_circuit *circuit; |
2325 | int retval = ISIS_OK; | |
eb5d44eb | 2326 | |
d62a17ae | 2327 | circuit = THREAD_ARG(thread); |
2328 | assert(circuit); | |
eb5d44eb | 2329 | |
d62a17ae | 2330 | circuit->t_send_psnp[0] = NULL; |
eb5d44eb | 2331 | |
d62a17ae | 2332 | send_psnp(1, circuit); |
2333 | /* set next timer thread */ | |
2334 | thread_add_timer(master, send_l1_psnp, circuit, | |
2335 | isis_jitter(circuit->psnp_interval[0], PSNP_JITTER), | |
2336 | &circuit->t_send_psnp[0]); | |
eb5d44eb | 2337 | |
d62a17ae | 2338 | return retval; |
eb5d44eb | 2339 | } |
2340 | ||
2341 | /* | |
2342 | * 7.3.15.4 action on expiration of partial SNP interval | |
2343 | * level 2 | |
2344 | */ | |
d62a17ae | 2345 | int send_l2_psnp(struct thread *thread) |
eb5d44eb | 2346 | { |
d62a17ae | 2347 | struct isis_circuit *circuit; |
2348 | int retval = ISIS_OK; | |
eb5d44eb | 2349 | |
d62a17ae | 2350 | circuit = THREAD_ARG(thread); |
2351 | assert(circuit); | |
eb5d44eb | 2352 | |
d62a17ae | 2353 | circuit->t_send_psnp[1] = NULL; |
eb5d44eb | 2354 | |
d62a17ae | 2355 | send_psnp(2, circuit); |
eb5d44eb | 2356 | |
d62a17ae | 2357 | /* set next timer thread */ |
2358 | thread_add_timer(master, send_l2_psnp, circuit, | |
2359 | isis_jitter(circuit->psnp_interval[1], PSNP_JITTER), | |
2360 | &circuit->t_send_psnp[1]); | |
eb5d44eb | 2361 | |
d62a17ae | 2362 | return retval; |
eb5d44eb | 2363 | } |
2364 | ||
eb5d44eb | 2365 | /* |
2366 | * ISO 10589 - 7.3.14.3 | |
2367 | */ | |
161fa356 CF |
2368 | void send_lsp(struct isis_circuit *circuit, struct isis_lsp *lsp, |
2369 | enum isis_tx_type tx_type) | |
eb5d44eb | 2370 | { |
d62a17ae | 2371 | int clear_srm = 1; |
2372 | int retval = ISIS_OK; | |
2373 | ||
d62a17ae | 2374 | if (circuit->state != C_STATE_UP || circuit->is_passive == 1) |
2375 | goto out; | |
2376 | ||
2377 | /* | |
2378 | * Do not send if levels do not match | |
2379 | */ | |
2380 | if (!(lsp->level & circuit->is_type)) | |
2381 | goto out; | |
2382 | ||
2383 | /* | |
2384 | * Do not send if we do not have adjacencies in state up on the circuit | |
2385 | */ | |
2386 | if (circuit->upadjcount[lsp->level - 1] == 0) | |
2387 | goto out; | |
2388 | ||
2389 | /* stream_copy will assert and stop program execution if LSP is larger | |
2390 | * than | |
2391 | * the circuit's MTU. So handle and log this case here. */ | |
2392 | if (stream_get_endp(lsp->pdu) > stream_get_size(circuit->snd_stream)) { | |
af4c2728 | 2393 | flog_err( |
1a7ecb96 | 2394 | EC_ISIS_PACKET, |
af8ac8f9 CF |
2395 | "ISIS-Upd (%s): Can't send L%d LSP %s, seq 0x%08" PRIx32 |
2396 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 | |
2397 | "s on %s. LSP Size is %zu while interface stream size is %zu.", | |
d62a17ae | 2398 | circuit->area->area_tag, lsp->level, |
af8ac8f9 CF |
2399 | rawlspid_print(lsp->hdr.lsp_id), lsp->hdr.seqno, |
2400 | lsp->hdr.checksum, lsp->hdr.rem_lifetime, | |
d62a17ae | 2401 | circuit->interface->name, stream_get_endp(lsp->pdu), |
2402 | stream_get_size(circuit->snd_stream)); | |
56e22fb6 EDP |
2403 | #ifndef FABRICD |
2404 | /* send a northbound notification */ | |
2405 | isis_notif_lsp_too_large(circuit, stream_get_endp(lsp->pdu), | |
2406 | rawlspid_print(lsp->hdr.lsp_id)); | |
2407 | #endif /* ifndef FABRICD */ | |
d62a17ae | 2408 | if (isis->debugs & DEBUG_PACKET_DUMP) |
2409 | zlog_dump_data(STREAM_DATA(lsp->pdu), | |
2410 | stream_get_endp(lsp->pdu)); | |
2411 | retval = ISIS_ERROR; | |
2412 | goto out; | |
2413 | } | |
eb5d44eb | 2414 | |
d62a17ae | 2415 | /* copy our lsp to the send buffer */ |
2416 | stream_copy(circuit->snd_stream, lsp->pdu); | |
2417 | ||
1cbd5b37 CF |
2418 | if (tx_type == TX_LSP_CIRCUIT_SCOPED) { |
2419 | stream_putc_at(circuit->snd_stream, 4, FS_LINK_STATE); | |
89cdc4df RM |
2420 | stream_putc_at(circuit->snd_stream, 7, |
2421 | L2_CIRCUIT_FLOODING_SCOPE); | |
1cbd5b37 CF |
2422 | } |
2423 | ||
d62a17ae | 2424 | if (isis->debugs & DEBUG_UPDATE_PACKETS) { |
161fa356 | 2425 | zlog_debug("ISIS-Upd (%s): Sending %sL%d LSP %s, seq 0x%08" PRIx32 |
af8ac8f9 CF |
2426 | ", cksum 0x%04" PRIx16 ", lifetime %" PRIu16 |
2427 | "s on %s", | |
161fa356 CF |
2428 | circuit->area->area_tag, |
2429 | (tx_type == TX_LSP_CIRCUIT_SCOPED) | |
2430 | ? "Circuit scoped " : "", | |
2431 | lsp->level, | |
af8ac8f9 CF |
2432 | rawlspid_print(lsp->hdr.lsp_id), lsp->hdr.seqno, |
2433 | lsp->hdr.checksum, lsp->hdr.rem_lifetime, | |
2434 | circuit->interface->name); | |
d62a17ae | 2435 | if (isis->debugs & DEBUG_PACKET_DUMP) |
2436 | zlog_dump_data(STREAM_DATA(circuit->snd_stream), | |
2437 | stream_get_endp(circuit->snd_stream)); | |
2438 | } | |
3f045a08 | 2439 | |
39bb53d6 CF |
2440 | uint8_t pdu_type = (tx_type == TX_LSP_CIRCUIT_SCOPED) ? FS_LINK_STATE |
2441 | : (lsp->level == ISIS_LEVEL1) ? L1_LINK_STATE | |
2442 | : L2_LINK_STATE; | |
2443 | ||
d62a17ae | 2444 | clear_srm = 0; |
39bb53d6 | 2445 | pdu_counter_count(circuit->area->pdu_tx_counters, pdu_type); |
d62a17ae | 2446 | retval = circuit->tx(circuit, lsp->level); |
2447 | if (retval != ISIS_OK) { | |
1a7ecb96 | 2448 | flog_err(EC_ISIS_PACKET, |
1c50c1c0 QY |
2449 | "ISIS-Upd (%s): Send L%d LSP on %s failed %s", |
2450 | circuit->area->area_tag, lsp->level, | |
2451 | circuit->interface->name, | |
2452 | (retval == ISIS_WARNING) ? "temporarily" | |
2453 | : "permanently"); | |
d62a17ae | 2454 | } |
f390d2c7 | 2455 | |
cfd1f27b | 2456 | out: |
d62a17ae | 2457 | if (clear_srm |
2458 | || (retval == ISIS_OK && circuit->circ_type == CIRCUIT_T_BROADCAST) | |
2459 | || (retval != ISIS_OK && retval != ISIS_WARNING)) { | |
2460 | /* SRM flag will trigger retransmission. We will not retransmit | |
2461 | * if we | |
2462 | * encountered a fatal error. | |
2463 | * On success, they should only be cleared if it's a broadcast | |
2464 | * circuit. | |
2465 | * On a P2P circuit, we will wait for the ack from the neighbor | |
2466 | * to clear | |
2467 | * the fag. | |
2468 | */ | |
9b39405f | 2469 | isis_tx_queue_del(circuit->tx_queue, lsp); |
d62a17ae | 2470 | } |
f390d2c7 | 2471 | } |