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74971473 JG |
1 | /* |
2 | * This file is part of the PCEPlib, a PCEP protocol library. | |
3 | * | |
4 | * Copyright (C) 2020 Volta Networks https://voltanet.io/ | |
5 | * | |
6 | * This library is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | * This library is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public License | |
17 | * along with this program. If not, see <https://www.gnu.org/licenses/>. | |
18 | * | |
19 | * Author : Brady Johnson <brady@voltanet.io> | |
20 | * | |
21 | */ | |
22 | ||
1f8031f7 DL |
23 | #ifdef HAVE_CONFIG_H |
24 | #include "config.h" | |
25 | #endif | |
26 | ||
74971473 JG |
27 | #include <pthread.h> |
28 | #include <stdbool.h> | |
29 | #include <stdio.h> | |
30 | #include <string.h> | |
7ed8c4b1 | 31 | #include <assert.h> |
74971473 JG |
32 | |
33 | #include "pcep_msg_encoding.h" | |
34 | #include "pcep_session_logic.h" | |
35 | #include "pcep_session_logic_internals.h" | |
36 | #include "pcep_timers.h" | |
37 | #include "pcep_utils_logging.h" | |
38 | #include "pcep_utils_memory.h" | |
39 | ||
40 | #define TIMER_OPEN_KEEP_ALIVE_SECONDS 1 | |
41 | ||
42 | /* Session Logic Handle managed in pcep_session_logic.c */ | |
43 | extern pcep_event_queue *session_logic_event_queue_; | |
44 | void send_keep_alive(pcep_session *session); | |
45 | void send_pcep_error_with_object(pcep_session *session, | |
46 | enum pcep_error_type error_type, | |
47 | enum pcep_error_value error_value, | |
48 | struct pcep_object_header *object); | |
49 | void reset_dead_timer(pcep_session *session); | |
50 | bool verify_pcep_open_object(pcep_session *session, | |
51 | struct pcep_object_open *open_object); | |
52 | void send_reconciled_pcep_open(pcep_session *session, | |
53 | struct pcep_message *error_msg); | |
54 | bool handle_pcep_update(pcep_session *session, struct pcep_message *upd_msg); | |
55 | bool handle_pcep_initiate(pcep_session *session, struct pcep_message *init_msg); | |
56 | bool check_and_send_open_keep_alive(pcep_session *session); | |
57 | void log_pcc_pce_connection(pcep_session *session); | |
58 | bool handle_pcep_open(pcep_session *session, struct pcep_message *open_msg); | |
59 | ||
60 | /* | |
61 | * util functions called by the state handling below | |
62 | */ | |
63 | ||
64 | void send_keep_alive(pcep_session *session) | |
65 | { | |
66 | struct pcep_message *keep_alive_msg = pcep_msg_create_keepalive(); | |
67 | ||
68 | pcep_log( | |
69 | LOG_INFO, | |
70 | "%s: [%ld-%ld] pcep_session_logic send keep_alive message for session [%d]", | |
71 | __func__, time(NULL), pthread_self(), session->session_id); | |
72 | ||
73 | session_send_message(session, keep_alive_msg); | |
74 | ||
75 | /* The keep alive timer will be (re)set once the message | |
76 | * is sent in session_logic_message_sent_handler() */ | |
77 | } | |
78 | ||
79 | ||
80 | /* Send an error message with the corrected or offending object */ | |
81 | void send_pcep_error_with_object(pcep_session *session, | |
82 | enum pcep_error_type error_type, | |
83 | enum pcep_error_value error_value, | |
84 | struct pcep_object_header *object) | |
85 | { | |
86 | double_linked_list *obj_list = dll_initialize(); | |
87 | dll_append(obj_list, object); | |
88 | struct pcep_message *error_msg = pcep_msg_create_error_with_objects( | |
89 | error_type, error_value, obj_list); | |
90 | ||
91 | pcep_log( | |
92 | LOG_INFO, | |
93 | "%s: [%ld-%ld] pcep_session_logic send error message with object [%d][%d] for session [%d]", | |
94 | __func__, time(NULL), pthread_self(), error_type, error_value, | |
95 | session->session_id); | |
96 | ||
97 | session_send_message(session, error_msg); | |
98 | } | |
99 | ||
100 | ||
101 | void send_pcep_error(pcep_session *session, enum pcep_error_type error_type, | |
102 | enum pcep_error_value error_value) | |
103 | { | |
104 | struct pcep_message *error_msg = | |
105 | pcep_msg_create_error(error_type, error_value); | |
106 | ||
107 | pcep_log( | |
108 | LOG_INFO, | |
109 | "%s: [%ld-%ld] pcep_session_logic send error message [%d][%d] for session [%d]", | |
110 | __func__, time(NULL), pthread_self(), error_type, error_value, | |
111 | session->session_id); | |
112 | ||
113 | session_send_message(session, error_msg); | |
114 | } | |
115 | ||
116 | ||
117 | void reset_dead_timer(pcep_session *session) | |
118 | { | |
119 | /* Default to configured dead_timer if its not set yet or set to 0 by | |
120 | * the PCE */ | |
121 | int dead_timer_seconds = | |
122 | (session->pcc_config.dead_timer_pce_negotiated_seconds == 0) | |
123 | ? session->pcc_config.dead_timer_seconds | |
124 | : session->pcc_config.dead_timer_pce_negotiated_seconds; | |
125 | ||
126 | if (session->timer_id_dead_timer == TIMER_ID_NOT_SET) { | |
127 | session->timer_id_dead_timer = | |
128 | create_timer(dead_timer_seconds, session); | |
129 | pcep_log( | |
130 | LOG_INFO, | |
131 | "%s: [%ld-%ld] pcep_session_logic set dead timer [%d secs] id [%d] for session [%d]", | |
132 | __func__, time(NULL), pthread_self(), | |
133 | dead_timer_seconds, session->timer_id_dead_timer, | |
134 | session->session_id); | |
135 | } else { | |
136 | pcep_log( | |
137 | LOG_INFO, | |
138 | "%s: [%ld-%ld] pcep_session_logic reset dead timer [%d secs] id [%d] for session [%d]", | |
139 | __func__, time(NULL), pthread_self(), | |
140 | dead_timer_seconds, session->timer_id_dead_timer, | |
141 | session->session_id); | |
142 | reset_timer(session->timer_id_dead_timer); | |
143 | } | |
144 | } | |
145 | ||
146 | ||
147 | void enqueue_event(pcep_session *session, pcep_event_type event_type, | |
148 | struct pcep_message *message) | |
149 | { | |
150 | if (event_type == MESSAGE_RECEIVED && message == NULL) { | |
151 | pcep_log( | |
152 | LOG_WARNING, | |
153 | "%s: enqueue_event cannot enqueue a NULL message session [%d]", | |
154 | __func__, session->session_id); | |
155 | return; | |
156 | } | |
157 | ||
158 | pcep_event *event = pceplib_malloc(PCEPLIB_INFRA, sizeof(pcep_event)); | |
159 | memset(event, 0, sizeof(pcep_event)); | |
160 | ||
161 | event->session = session; | |
162 | event->event_type = event_type; | |
163 | event->event_time = time(NULL); | |
164 | event->message = message; | |
165 | ||
166 | pthread_mutex_lock(&session_logic_event_queue_->event_queue_mutex); | |
167 | if (session_logic_event_queue_->event_callback != NULL) { | |
168 | session_logic_event_queue_->event_callback( | |
169 | session_logic_event_queue_->event_callback_data, event); | |
170 | } else { | |
171 | queue_enqueue(session_logic_event_queue_->event_queue, event); | |
172 | } | |
173 | pthread_mutex_unlock(&session_logic_event_queue_->event_queue_mutex); | |
174 | } | |
175 | ||
176 | /* Verify the received PCEP Open object parameters are acceptable. If not, | |
177 | * update the unacceptable value(s) with an acceptable value so it can be sent | |
178 | * back to the sender. */ | |
179 | bool verify_pcep_open_object(pcep_session *session, | |
180 | struct pcep_object_open *open_object) | |
181 | { | |
182 | int retval = true; | |
183 | ||
184 | if (open_object->open_keepalive | |
185 | < session->pcc_config.min_keep_alive_seconds) { | |
186 | pcep_log( | |
187 | LOG_INFO, | |
188 | "%s: Rejecting unsupported Open Keep Alive value [%d] min [%d]", | |
189 | __func__, open_object->open_keepalive, | |
190 | session->pcc_config.min_keep_alive_seconds); | |
191 | open_object->open_keepalive = | |
192 | session->pcc_config.min_keep_alive_seconds; | |
193 | retval = false; | |
194 | } else if (open_object->open_keepalive | |
195 | > session->pcc_config.max_keep_alive_seconds) { | |
196 | pcep_log( | |
197 | LOG_INFO, | |
198 | "%s: Rejecting unsupported Open Keep Alive value [%d] max [%d]", | |
199 | __func__, open_object->open_keepalive, | |
200 | session->pcc_config.max_keep_alive_seconds); | |
201 | open_object->open_keepalive = | |
202 | session->pcc_config.max_keep_alive_seconds; | |
203 | retval = false; | |
204 | } | |
205 | ||
206 | if (open_object->open_deadtimer | |
207 | < session->pcc_config.min_dead_timer_seconds) { | |
208 | pcep_log(LOG_INFO, | |
209 | "%s: Rejecting unsupported Open Dead Timer value [%d]", | |
210 | __func__, open_object->open_deadtimer); | |
211 | open_object->open_deadtimer = | |
212 | session->pcc_config.min_dead_timer_seconds; | |
213 | retval = false; | |
214 | } else if (open_object->open_deadtimer | |
215 | > session->pcc_config.max_dead_timer_seconds) { | |
216 | pcep_log(LOG_INFO, | |
217 | "%s: Rejecting unsupported Open Dead Timer value [%d]", | |
218 | __func__, open_object->open_deadtimer); | |
219 | open_object->open_deadtimer = | |
220 | session->pcc_config.max_dead_timer_seconds; | |
221 | retval = false; | |
222 | } | |
223 | ||
224 | /* Check for Open Object TLVs */ | |
225 | if (pcep_object_has_tlvs((struct pcep_object_header *)open_object) | |
226 | == false) { | |
227 | /* There are no TLVs, all done */ | |
228 | return retval; | |
229 | } | |
230 | ||
231 | double_linked_list_node *tlv_node = open_object->header.tlv_list->head; | |
232 | while (tlv_node != NULL) { | |
233 | struct pcep_object_tlv_header *tlv = tlv_node->data; | |
234 | tlv_node = tlv_node->next_node; | |
235 | ||
236 | /* Supported Open Object TLVs */ | |
237 | switch (tlv->type) { | |
238 | case PCEP_OBJ_TLV_TYPE_LSP_DB_VERSION: | |
239 | case PCEP_OBJ_TLV_TYPE_PATH_SETUP_TYPE_CAPABILITY: | |
240 | case PCEP_OBJ_TLV_TYPE_SPEAKER_ENTITY_ID: | |
241 | case PCEP_OBJ_TLV_TYPE_STATEFUL_PCE_CAPABILITY: | |
242 | case PCEP_OBJ_TLV_TYPE_SR_PCE_CAPABILITY: | |
243 | break; | |
244 | ||
245 | default: | |
246 | /* TODO how to handle unrecognized TLV ?? */ | |
247 | pcep_log( | |
248 | LOG_INFO, | |
249 | "%s: Unhandled OPEN Object TLV type: %d, length %d", | |
250 | __func__, tlv->type, tlv->encoded_tlv_length); | |
251 | break; | |
252 | } | |
253 | ||
254 | /* Verify the STATEFUL-PCE-CAPABILITY TLV */ | |
255 | if (tlv->type == PCEP_OBJ_TLV_TYPE_STATEFUL_PCE_CAPABILITY) { | |
256 | struct pcep_object_tlv_stateful_pce_capability | |
257 | *pce_cap_tlv = | |
258 | (struct | |
259 | pcep_object_tlv_stateful_pce_capability | |
260 | *)tlv; | |
261 | ||
262 | /* If the U flag is set, then the PCE is | |
263 | * capable of updating LSP parameters */ | |
264 | if (pce_cap_tlv->flag_u_lsp_update_capability) { | |
265 | if (session->pce_config | |
266 | .support_stateful_pce_lsp_update | |
267 | == false) { | |
268 | /* Turn off the U bit, as it is not | |
269 | * supported */ | |
270 | pcep_log( | |
271 | LOG_INFO, | |
272 | "%s: Rejecting unsupported Open STATEFUL-PCE-CAPABILITY TLV U flag", | |
273 | __func__); | |
274 | pce_cap_tlv | |
275 | ->flag_u_lsp_update_capability = | |
276 | false; | |
277 | retval = false; | |
278 | } else { | |
279 | session->stateful_pce = true; | |
280 | pcep_log( | |
281 | LOG_INFO, | |
282 | "%s: Setting PCEP session [%d] STATEFUL to support LSP updates", | |
283 | __func__, session->session_id); | |
284 | } | |
285 | } | |
286 | /* TODO the rest of the flags are not implemented yet */ | |
287 | else if (pce_cap_tlv->flag_s_include_db_version) { | |
288 | pcep_log( | |
289 | LOG_INFO, | |
290 | "%s: Ignoring Open STATEFUL-PCE-CAPABILITY TLV S Include DB Version flag", | |
291 | __func__); | |
292 | } else if ( | |
293 | pce_cap_tlv | |
294 | ->flag_i_lsp_instantiation_capability) { | |
295 | pcep_log( | |
296 | LOG_INFO, | |
297 | "%s: Ignoring Open STATEFUL-PCE-CAPABILITY TLV I LSP Instantiation Capability flag", | |
298 | __func__); | |
299 | } else if (pce_cap_tlv->flag_t_triggered_resync) { | |
300 | pcep_log( | |
301 | LOG_INFO, | |
302 | "%s: Ignoring Open STATEFUL-PCE-CAPABILITY TLV T Triggered Resync flag", | |
303 | __func__); | |
304 | } else if (pce_cap_tlv->flag_d_delta_lsp_sync) { | |
305 | pcep_log( | |
306 | LOG_INFO, | |
307 | "%s: Ignoring Open STATEFUL-PCE-CAPABILITY TLV D Delta LSP Sync flag", | |
308 | __func__); | |
309 | } else if (pce_cap_tlv->flag_f_triggered_initial_sync) { | |
310 | pcep_log( | |
311 | LOG_INFO, | |
312 | "%s: Ignoring Open STATEFUL-PCE-CAPABILITY TLV F Triggered Initial Sync flag", | |
313 | __func__); | |
314 | } | |
315 | } else if (tlv->type == PCEP_OBJ_TLV_TYPE_LSP_DB_VERSION) { | |
316 | if (session->pce_config.support_include_db_version | |
317 | == false) { | |
318 | pcep_log( | |
319 | LOG_INFO, | |
320 | "%s: Rejecting unsupported Open LSP DB VERSION TLV", | |
321 | __func__); | |
322 | /* Remove this TLV from the list */ | |
323 | dll_delete_node(open_object->header.tlv_list, | |
324 | tlv_node); | |
325 | retval = false; | |
326 | } | |
327 | } | |
328 | } | |
329 | ||
330 | return retval; | |
331 | } | |
332 | ||
333 | ||
334 | bool handle_pcep_open(pcep_session *session, struct pcep_message *open_msg) | |
335 | { | |
336 | /* Open Message validation and errors according to: | |
337 | * https://tools.ietf.org/html/rfc5440#section-7.15 */ | |
338 | ||
339 | if (session->session_state != SESSION_STATE_PCEP_CONNECTING | |
340 | && session->session_state != SESSION_STATE_INITIALIZED) { | |
341 | pcep_log( | |
342 | LOG_INFO, | |
343 | "%s: Received unexpected OPEN, current session state [%d, replying with error]", | |
344 | __func__, session->session_state); | |
345 | send_pcep_error(session, | |
346 | PCEP_ERRT_ATTEMPT_TO_ESTABLISH_2ND_PCEP_SESSION, | |
347 | PCEP_ERRV_RECVD_INVALID_OPEN_MSG); | |
348 | return false; | |
349 | } | |
350 | ||
351 | if (session->pce_open_received == true | |
352 | && session->pce_open_rejected == false) { | |
353 | pcep_log(LOG_INFO, | |
354 | "%s: Received duplicate OPEN, replying with error", | |
355 | __func__); | |
356 | send_pcep_error(session, | |
357 | PCEP_ERRT_ATTEMPT_TO_ESTABLISH_2ND_PCEP_SESSION, | |
358 | PCEP_ERRV_RECVD_INVALID_OPEN_MSG); | |
359 | return false; | |
360 | } | |
361 | ||
362 | struct pcep_object_open *open_object = | |
363 | (struct pcep_object_open *)pcep_obj_get(open_msg->obj_list, | |
364 | PCEP_OBJ_CLASS_OPEN); | |
365 | if (open_object == NULL) { | |
366 | pcep_log( | |
367 | LOG_INFO, | |
368 | "%s: Received OPEN message with no OPEN object, replying with error", | |
369 | __func__); | |
370 | send_pcep_error(session, PCEP_ERRT_SESSION_FAILURE, | |
371 | PCEP_ERRV_RECVD_INVALID_OPEN_MSG); | |
372 | return false; | |
373 | } | |
374 | ||
375 | /* Check for additional Open Msg objects */ | |
376 | if (open_msg->obj_list->num_entries > 1) { | |
377 | pcep_log( | |
378 | LOG_INFO, | |
379 | "%s: Found additional unsupported objects in the Open message, replying with error", | |
380 | __func__); | |
381 | send_pcep_error(session, PCEP_ERRT_SESSION_FAILURE, | |
382 | PCEP_ERRV_RECVD_INVALID_OPEN_MSG); | |
383 | return false; | |
384 | } | |
385 | ||
386 | session->pce_open_received = true; | |
387 | ||
388 | /* Verify the open object parameters and TLVs */ | |
389 | if (verify_pcep_open_object(session, open_object) == false) { | |
390 | enqueue_event(session, PCC_RCVD_INVALID_OPEN, NULL); | |
391 | if (session->pce_open_rejected) { | |
392 | /* The Open message was already rejected once, so | |
393 | * according to the spec, send an error message and | |
394 | * close the TCP connection. */ | |
395 | pcep_log( | |
396 | LOG_INFO, | |
397 | "%s: Received 2 consecutive unsupported Open messages, closing the connection.", | |
398 | __func__); | |
399 | send_pcep_error( | |
400 | session, PCEP_ERRT_SESSION_FAILURE, | |
401 | PCEP_ERRV_RECVD_SECOND_OPEN_MSG_UNACCEPTABLE); | |
402 | socket_comm_session_close_tcp_after_write( | |
403 | session->socket_comm_session); | |
404 | session->session_state = SESSION_STATE_INITIALIZED; | |
405 | enqueue_event(session, PCC_CONNECTION_FAILURE, NULL); | |
406 | } else { | |
407 | session->pce_open_rejected = true; | |
408 | /* Clone the object here, since the encapsulating | |
409 | * message will be deleted in handle_socket_comm_event() | |
410 | * most likely before this error message is sent */ | |
411 | struct pcep_object_open *cloned_open_object = | |
412 | pceplib_malloc(PCEPLIB_MESSAGES, | |
413 | sizeof(struct pcep_object_open)); | |
414 | memcpy(cloned_open_object, open_object, | |
415 | sizeof(struct pcep_object_open)); | |
416 | open_object->header.tlv_list = NULL; | |
417 | cloned_open_object->header.encoded_object = NULL; | |
418 | cloned_open_object->header.encoded_object_length = 0; | |
419 | send_pcep_error_with_object( | |
420 | session, PCEP_ERRT_SESSION_FAILURE, | |
421 | PCEP_ERRV_UNACCEPTABLE_OPEN_MSG_NEG, | |
422 | &cloned_open_object->header); | |
423 | } | |
424 | ||
425 | return false; | |
426 | } | |
427 | ||
428 | /* | |
429 | * Open Message accepted | |
430 | * Sending the keep-alive response will be managed the function caller | |
431 | */ | |
432 | ||
433 | session->timer_id_open_keep_alive = | |
434 | create_timer(TIMER_OPEN_KEEP_ALIVE_SECONDS, session); | |
435 | session->pcc_config.dead_timer_pce_negotiated_seconds = | |
436 | (int)open_object->open_deadtimer; | |
437 | /* Cancel the timer so we can change the dead_timer value */ | |
438 | cancel_timer(session->timer_id_dead_timer); | |
439 | session->timer_id_dead_timer = TIMER_ID_NOT_SET; | |
440 | reset_dead_timer(session); | |
441 | ||
442 | return true; | |
443 | } | |
444 | ||
445 | ||
446 | /* The original PCEP Open message sent to the PCE was rejected, | |
447 | * try to reconcile the differences and re-send a new Open. */ | |
448 | void send_reconciled_pcep_open(pcep_session *session, | |
449 | struct pcep_message *error_msg) | |
450 | { | |
451 | struct pcep_message *open_msg = create_pcep_open(session); | |
452 | ||
453 | struct pcep_object_open *error_open_obj = | |
454 | (struct pcep_object_open *)pcep_obj_get(error_msg->obj_list, | |
455 | PCEP_OBJ_CLASS_OPEN); | |
456 | if (error_open_obj == NULL) { | |
457 | /* Nothing to reconcile, send the same Open message again */ | |
458 | pcep_log( | |
459 | LOG_INFO, | |
460 | "%s: No Open object received in Error, sending the same Open message", | |
461 | __func__); | |
462 | session_send_message(session, open_msg); | |
463 | return; | |
464 | } | |
465 | ||
466 | struct pcep_object_open *open_obj = | |
467 | (struct pcep_object_open *)pcep_obj_get(open_msg->obj_list, | |
468 | PCEP_OBJ_CLASS_OPEN); | |
7ed8c4b1 JG |
469 | // open_msg can not have empty obj_list |
470 | assert(open_obj != NULL); | |
74971473 JG |
471 | |
472 | if (error_open_obj->open_deadtimer | |
473 | != session->pce_config.dead_timer_seconds) { | |
474 | if (error_open_obj->open_deadtimer | |
475 | >= session->pce_config.min_dead_timer_seconds | |
476 | && error_open_obj->open_deadtimer | |
477 | <= session->pce_config.max_dead_timer_seconds) { | |
478 | open_obj->open_deadtimer = | |
479 | error_open_obj->open_deadtimer; | |
480 | session->pcc_config.dead_timer_pce_negotiated_seconds = | |
481 | error_open_obj->open_deadtimer; | |
482 | pcep_log( | |
483 | LOG_INFO, | |
484 | "%s: Open deadtimer value [%d] rejected, using PCE value [%d]", | |
485 | __func__, | |
486 | session->pcc_config.dead_timer_seconds, | |
487 | session->pcc_config | |
488 | .dead_timer_pce_negotiated_seconds); | |
489 | /* Reset the timer with the new value */ | |
490 | cancel_timer(session->timer_id_dead_timer); | |
491 | session->timer_id_dead_timer = TIMER_ID_NOT_SET; | |
492 | reset_dead_timer(session); | |
493 | } else { | |
494 | pcep_log( | |
495 | LOG_INFO, | |
496 | "%s: Can not reconcile Open with suggested deadtimer [%d]", | |
497 | __func__, error_open_obj->open_deadtimer); | |
498 | } | |
499 | } | |
500 | ||
501 | if (error_open_obj->open_keepalive | |
502 | != session->pce_config.keep_alive_seconds) { | |
503 | if (error_open_obj->open_keepalive | |
504 | >= session->pce_config.min_keep_alive_seconds | |
505 | && error_open_obj->open_keepalive | |
506 | <= session->pce_config.max_keep_alive_seconds) { | |
507 | open_obj->open_keepalive = | |
508 | error_open_obj->open_keepalive; | |
509 | session->pcc_config | |
510 | .keep_alive_pce_negotiated_timer_seconds = | |
511 | error_open_obj->open_keepalive; | |
512 | pcep_log( | |
513 | LOG_INFO, | |
514 | "%s: Open keep alive value [%d] rejected, using PCE value [%d]", | |
515 | __func__, | |
516 | session->pcc_config.keep_alive_seconds, | |
517 | session->pcc_config | |
518 | .keep_alive_pce_negotiated_timer_seconds); | |
519 | /* Cancel the timer, the timer will be set again with | |
520 | * the new value when this open message is sent */ | |
521 | cancel_timer(session->timer_id_keep_alive); | |
522 | session->timer_id_keep_alive = TIMER_ID_NOT_SET; | |
523 | } else { | |
524 | pcep_log( | |
525 | LOG_INFO, | |
526 | "%s: Can not reconcile Open with suggested keepalive [%d]", | |
527 | __func__, error_open_obj->open_keepalive); | |
528 | } | |
529 | } | |
530 | ||
531 | /* TODO reconcile the TLVs */ | |
532 | ||
533 | session_send_message(session, open_msg); | |
534 | reset_timer(session->timer_id_open_keep_alive); | |
535 | } | |
536 | ||
537 | ||
538 | bool handle_pcep_update(pcep_session *session, struct pcep_message *upd_msg) | |
539 | { | |
540 | /* Update Message validation and errors according to: | |
541 | * https://tools.ietf.org/html/rfc8231#section-6.2 */ | |
542 | ||
543 | if (upd_msg->obj_list == NULL) { | |
544 | pcep_log(LOG_INFO, | |
545 | "%s: Invalid PcUpd message: Message has no objects", | |
546 | __func__); | |
547 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
548 | PCEP_ERRV_SRP_OBJECT_MISSING); | |
549 | return false; | |
550 | } | |
551 | ||
552 | /* Verify the mandatory objects are present */ | |
553 | struct pcep_object_header *obj = | |
554 | pcep_obj_get(upd_msg->obj_list, PCEP_OBJ_CLASS_SRP); | |
555 | if (obj == NULL) { | |
556 | pcep_log(LOG_INFO, | |
557 | "%s: Invalid PcUpd message: Missing SRP object", | |
558 | __func__); | |
559 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
560 | PCEP_ERRV_SRP_OBJECT_MISSING); | |
561 | return false; | |
562 | } | |
563 | ||
564 | obj = pcep_obj_get(upd_msg->obj_list, PCEP_OBJ_CLASS_LSP); | |
565 | if (obj == NULL) { | |
566 | pcep_log(LOG_INFO, | |
567 | "%s: Invalid PcUpd message: Missing LSP object", | |
568 | __func__); | |
569 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
570 | PCEP_ERRV_LSP_OBJECT_MISSING); | |
571 | return false; | |
572 | } | |
573 | ||
574 | obj = pcep_obj_get(upd_msg->obj_list, PCEP_OBJ_CLASS_ERO); | |
575 | if (obj == NULL) { | |
576 | pcep_log(LOG_INFO, | |
577 | "%s: Invalid PcUpd message: Missing ERO object", | |
578 | __func__); | |
579 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
580 | PCEP_ERRV_ERO_OBJECT_MISSING); | |
581 | return false; | |
582 | } | |
583 | ||
584 | /* Verify the objects are are in the correct order */ | |
585 | double_linked_list_node *node = upd_msg->obj_list->head; | |
586 | struct pcep_object_srp *srp_object = | |
587 | (struct pcep_object_srp *)node->data; | |
588 | if (srp_object->header.object_class != PCEP_OBJ_CLASS_SRP) { | |
589 | pcep_log( | |
590 | LOG_INFO, | |
591 | "%s: Invalid PcUpd message: First object must be an SRP, found [%d]", | |
592 | __func__, srp_object->header.object_class); | |
593 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
594 | PCEP_ERRV_SRP_OBJECT_MISSING); | |
595 | return false; | |
596 | } | |
597 | ||
598 | node = node->next_node; | |
599 | struct pcep_object_lsp *lsp_object = | |
600 | (struct pcep_object_lsp *)node->data; | |
601 | if (lsp_object->header.object_class != PCEP_OBJ_CLASS_LSP) { | |
602 | pcep_log( | |
603 | LOG_INFO, | |
604 | "%s: Invalid PcUpd message: Second object must be an LSP, found [%d]", | |
605 | __func__, lsp_object->header.object_class); | |
606 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
607 | PCEP_ERRV_LSP_OBJECT_MISSING); | |
608 | return false; | |
609 | } | |
610 | ||
611 | node = node->next_node; | |
612 | struct pcep_object_ro *ero_object = node->data; | |
613 | if (ero_object->header.object_class != PCEP_OBJ_CLASS_ERO) { | |
614 | pcep_log( | |
615 | LOG_INFO, | |
616 | "%s: Invalid PcUpd message: Third object must be an ERO, found [%d]", | |
617 | __func__, ero_object->header.object_class); | |
618 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
619 | PCEP_ERRV_ERO_OBJECT_MISSING); | |
620 | return false; | |
621 | } | |
622 | ||
623 | return true; | |
624 | } | |
625 | ||
626 | bool handle_pcep_initiate(pcep_session *session, struct pcep_message *init_msg) | |
627 | { | |
628 | /* Instantiate Message validation and errors according to: | |
629 | * https://tools.ietf.org/html/rfc8281#section-5 */ | |
630 | ||
631 | if (init_msg->obj_list == NULL) { | |
632 | pcep_log( | |
633 | LOG_INFO, | |
634 | "%s: Invalid PcInitiate message: Message has no objects", | |
635 | __func__); | |
636 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
637 | PCEP_ERRV_SRP_OBJECT_MISSING); | |
638 | return false; | |
639 | } | |
640 | ||
641 | /* Verify the mandatory objects are present */ | |
642 | struct pcep_object_header *obj = | |
643 | pcep_obj_get(init_msg->obj_list, PCEP_OBJ_CLASS_SRP); | |
644 | if (obj == NULL) { | |
645 | pcep_log(LOG_INFO, | |
646 | "%s: Invalid PcInitiate message: Missing SRP object", | |
647 | __func__); | |
648 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
649 | PCEP_ERRV_SRP_OBJECT_MISSING); | |
650 | return false; | |
651 | } | |
652 | ||
653 | obj = pcep_obj_get(init_msg->obj_list, PCEP_OBJ_CLASS_LSP); | |
654 | if (obj == NULL) { | |
655 | pcep_log(LOG_INFO, | |
656 | "%s: Invalid PcInitiate message: Missing LSP object", | |
657 | __func__); | |
658 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
659 | PCEP_ERRV_LSP_OBJECT_MISSING); | |
660 | return false; | |
661 | } | |
662 | ||
663 | /* Verify the objects are are in the correct order */ | |
664 | double_linked_list_node *node = init_msg->obj_list->head; | |
665 | struct pcep_object_srp *srp_object = | |
666 | (struct pcep_object_srp *)node->data; | |
667 | if (srp_object->header.object_class != PCEP_OBJ_CLASS_SRP) { | |
668 | pcep_log( | |
669 | LOG_INFO, | |
670 | "%s: Invalid PcInitiate message: First object must be an SRP, found [%d]", | |
671 | __func__, srp_object->header.object_class); | |
672 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
673 | PCEP_ERRV_SRP_OBJECT_MISSING); | |
674 | return false; | |
675 | } | |
676 | ||
677 | node = node->next_node; | |
678 | struct pcep_object_lsp *lsp_object = | |
679 | (struct pcep_object_lsp *)node->data; | |
680 | if (lsp_object->header.object_class != PCEP_OBJ_CLASS_LSP) { | |
681 | pcep_log( | |
682 | LOG_INFO, | |
683 | "%s: Invalid PcInitiate message: Second object must be an LSP, found [%d]", | |
684 | __func__, lsp_object->header.object_class); | |
685 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
686 | PCEP_ERRV_LSP_OBJECT_MISSING); | |
687 | return false; | |
688 | } | |
689 | ||
690 | /* There may be more optional objects */ | |
691 | return true; | |
692 | } | |
693 | ||
694 | void increment_unknown_message(pcep_session *session) | |
695 | { | |
696 | /* https://tools.ietf.org/html/rfc5440#section-6.9 | |
697 | * If a PCC/PCE receives unrecognized messages at a rate equal or | |
698 | * greater than MAX-UNKNOWN-MESSAGES unknown message requests per | |
699 | * minute, the PCC/PCE MUST send a PCEP CLOSE message */ | |
700 | ||
701 | time_t *unknown_message_time = | |
702 | pceplib_malloc(PCEPLIB_INFRA, sizeof(time_t)); | |
703 | *unknown_message_time = time(NULL); | |
704 | time_t expire_time = *unknown_message_time + 60; | |
705 | queue_enqueue(session->num_unknown_messages_time_queue, | |
706 | unknown_message_time); | |
707 | ||
708 | /* Purge any entries older than 1 minute. The oldest entries are at the | |
709 | * queue head */ | |
710 | queue_node *time_node = session->num_unknown_messages_time_queue->head; | |
711 | while (time_node != NULL) { | |
712 | if (*((time_t *)time_node->data) > expire_time) { | |
713 | pceplib_free( | |
714 | PCEPLIB_INFRA, | |
715 | queue_dequeue( | |
716 | session->num_unknown_messages_time_queue)); | |
717 | time_node = | |
718 | session->num_unknown_messages_time_queue->head; | |
719 | } else { | |
720 | time_node = NULL; | |
721 | } | |
722 | } | |
723 | ||
724 | if ((int)session->num_unknown_messages_time_queue->num_entries | |
725 | >= session->pcc_config.max_unknown_messages) { | |
726 | pcep_log( | |
727 | LOG_INFO, | |
728 | "%s: [%ld-%ld] Max unknown messages reached [%d] closing session [%d]", | |
729 | __func__, time(NULL), pthread_self(), | |
730 | session->pcc_config.max_unknown_messages, | |
731 | session->session_id); | |
732 | ||
733 | close_pcep_session_with_reason(session, | |
734 | PCEP_CLOSE_REASON_UNREC_MSG); | |
735 | enqueue_event(session, PCC_RCVD_MAX_UNKOWN_MSGS, NULL); | |
736 | } | |
737 | } | |
738 | ||
739 | bool check_and_send_open_keep_alive(pcep_session *session) | |
740 | { | |
741 | if (session->pce_open_received == true | |
742 | && session->pce_open_rejected == false | |
743 | && session->pce_open_keep_alive_sent == false) { | |
744 | /* Send the PCE Open keep-alive response if it hasnt been sent | |
745 | * yet */ | |
746 | cancel_timer(session->timer_id_open_keep_alive); | |
747 | session->timer_id_open_keep_alive = TIMER_ID_NOT_SET; | |
748 | send_keep_alive(session); | |
749 | session->pce_open_keep_alive_sent = true; | |
750 | ||
751 | return true; | |
752 | } | |
753 | ||
754 | return false; | |
755 | } | |
756 | ||
757 | void log_pcc_pce_connection(pcep_session *session) | |
758 | { | |
759 | if (session->socket_comm_session == NULL) { | |
760 | /* This only happens in UT */ | |
761 | return; | |
762 | } | |
763 | ||
764 | char src_ip_buf[40] = {0}, dst_ip_buf[40] = {0}; | |
765 | uint16_t src_port, dst_port; | |
766 | ||
767 | if (session->socket_comm_session->is_ipv6) { | |
768 | inet_ntop(AF_INET6, | |
769 | &session->socket_comm_session->src_sock_addr | |
770 | .src_sock_addr_ipv6.sin6_addr, | |
771 | src_ip_buf, sizeof(src_ip_buf)); | |
772 | inet_ntop(AF_INET6, | |
773 | &session->socket_comm_session->dest_sock_addr | |
774 | .dest_sock_addr_ipv6.sin6_addr, | |
775 | dst_ip_buf, sizeof(dst_ip_buf)); | |
776 | src_port = htons(session->socket_comm_session->src_sock_addr | |
777 | .src_sock_addr_ipv6.sin6_port); | |
778 | dst_port = htons(session->socket_comm_session->dest_sock_addr | |
779 | .dest_sock_addr_ipv6.sin6_port); | |
780 | } else { | |
781 | inet_ntop(AF_INET, | |
782 | &session->socket_comm_session->src_sock_addr | |
783 | .src_sock_addr_ipv4.sin_addr, | |
784 | src_ip_buf, sizeof(src_ip_buf)); | |
785 | inet_ntop(AF_INET, | |
786 | &session->socket_comm_session->dest_sock_addr | |
787 | .dest_sock_addr_ipv4.sin_addr, | |
788 | dst_ip_buf, sizeof(dst_ip_buf)); | |
789 | src_port = htons(session->socket_comm_session->src_sock_addr | |
790 | .src_sock_addr_ipv4.sin_port); | |
791 | dst_port = htons(session->socket_comm_session->dest_sock_addr | |
792 | .dest_sock_addr_ipv4.sin_port); | |
793 | } | |
794 | ||
795 | pcep_log( | |
796 | LOG_INFO, | |
797 | "%s: [%ld-%ld] Successful PCC [%s:%d] connection to PCE [%s:%d] session [%d] fd [%d]", | |
798 | __func__, time(NULL), pthread_self(), src_ip_buf, src_port, | |
799 | dst_ip_buf, dst_port, session->session_id, | |
800 | session->socket_comm_session->socket_fd); | |
801 | } | |
802 | ||
803 | /* | |
804 | * these functions are called by session_logic_loop() from | |
805 | * pcep_session_logic_loop.c these functions are executed in the | |
806 | * session_logic_loop thread, and the mutex is locked before calling these | |
807 | * functions, so they are thread safe. | |
808 | */ | |
809 | ||
810 | /* state machine handling for expired timers */ | |
811 | void handle_timer_event(pcep_session_event *event) | |
812 | { | |
813 | if (event == NULL) { | |
814 | pcep_log(LOG_INFO, "%s: handle_timer_event NULL event", | |
815 | __func__); | |
816 | return; | |
817 | } | |
818 | ||
819 | pcep_session *session = event->session; | |
820 | ||
821 | pcep_log( | |
822 | LOG_INFO, | |
d85bf6f1 | 823 | "%s: [%ld-%ld] pcep_session_logic handle_timer_event: session [%d] event timer_id [%d] session timers [OKW, OKA, DT, KA] [%d, %d, %d, %d]", |
74971473 JG |
824 | __func__, time(NULL), pthread_self(), session->session_id, |
825 | event->expired_timer_id, session->timer_id_open_keep_wait, | |
826 | session->timer_id_open_keep_alive, session->timer_id_dead_timer, | |
827 | session->timer_id_keep_alive); | |
828 | ||
829 | /* | |
830 | * these timer expirations are independent of the session state | |
831 | */ | |
832 | if (event->expired_timer_id == session->timer_id_dead_timer) { | |
833 | session->timer_id_dead_timer = TIMER_ID_NOT_SET; | |
834 | increment_event_counters(session, | |
835 | PCEP_EVENT_COUNTER_ID_TIMER_DEADTIMER); | |
836 | close_pcep_session_with_reason(session, | |
837 | PCEP_CLOSE_REASON_DEADTIMER); | |
838 | enqueue_event(session, PCE_DEAD_TIMER_EXPIRED, NULL); | |
839 | return; | |
840 | } else if (event->expired_timer_id == session->timer_id_keep_alive) { | |
841 | session->timer_id_keep_alive = TIMER_ID_NOT_SET; | |
842 | increment_event_counters(session, | |
843 | PCEP_EVENT_COUNTER_ID_TIMER_KEEPALIVE); | |
844 | send_keep_alive(session); | |
845 | return; | |
846 | } | |
847 | ||
848 | /* | |
849 | * handle timers that depend on the session state | |
850 | */ | |
851 | switch (session->session_state) { | |
852 | case SESSION_STATE_PCEP_CONNECTING: | |
853 | if (event->expired_timer_id | |
854 | == session->timer_id_open_keep_wait) { | |
855 | /* close the TCP session */ | |
856 | pcep_log( | |
857 | LOG_INFO, | |
858 | "%s: handle_timer_event open_keep_wait timer expired for session [%d]", | |
859 | __func__, session->session_id); | |
860 | increment_event_counters( | |
861 | session, | |
862 | PCEP_EVENT_COUNTER_ID_TIMER_OPENKEEPWAIT); | |
863 | socket_comm_session_close_tcp_after_write( | |
864 | session->socket_comm_session); | |
865 | session->session_state = SESSION_STATE_INITIALIZED; | |
866 | session->timer_id_open_keep_wait = TIMER_ID_NOT_SET; | |
867 | enqueue_event(session, PCE_OPEN_KEEP_WAIT_TIMER_EXPIRED, | |
868 | NULL); | |
869 | } | |
870 | ||
871 | if (event->expired_timer_id | |
872 | == session->timer_id_open_keep_alive) { | |
873 | increment_event_counters( | |
874 | session, | |
875 | PCEP_EVENT_COUNTER_ID_TIMER_OPENKEEPALIVE); | |
876 | session->timer_id_open_keep_alive = TIMER_ID_NOT_SET; | |
877 | if (check_and_send_open_keep_alive(session) == true) { | |
878 | if (session->pcc_open_accepted == true | |
879 | && session->session_state | |
880 | != SESSION_STATE_PCEP_CONNECTED) { | |
881 | log_pcc_pce_connection(session); | |
882 | session->session_state = | |
883 | SESSION_STATE_PCEP_CONNECTED; | |
884 | increment_event_counters( | |
885 | session, | |
886 | PCEP_EVENT_COUNTER_ID_PCE_CONNECT); | |
887 | enqueue_event(session, | |
888 | PCC_CONNECTED_TO_PCE, | |
889 | NULL); | |
890 | } | |
891 | } | |
892 | return; | |
893 | } | |
894 | break; | |
895 | ||
896 | case SESSION_STATE_INITIALIZED: | |
897 | case SESSION_STATE_PCEP_CONNECTED: | |
898 | default: | |
899 | pcep_log( | |
900 | LOG_INFO, | |
901 | "%s: handle_timer_event unrecognized state transition, timer_id [%d] state [%d] session [%d]", | |
902 | __func__, event->expired_timer_id, | |
903 | session->session_state, session->session_id); | |
904 | break; | |
905 | } | |
906 | } | |
907 | ||
908 | /* State machine handling for received messages. | |
909 | * This event was created in session_logic_msg_ready_handler() in | |
910 | * pcep_session_logic_loop.c */ | |
911 | void handle_socket_comm_event(pcep_session_event *event) | |
912 | { | |
913 | if (event == NULL) { | |
914 | pcep_log(LOG_INFO, "%s: handle_socket_comm_event NULL event", | |
915 | __func__); | |
916 | return; | |
917 | } | |
918 | ||
919 | pcep_session *session = event->session; | |
920 | ||
921 | pcep_log( | |
922 | LOG_INFO, | |
923 | "%s: [%ld-%ld] pcep_session_logic handle_socket_comm_event: session [%d] num messages [%d] socket_closed [%d]", | |
924 | __func__, time(NULL), pthread_self(), session->session_id, | |
925 | (event->received_msg_list == NULL | |
926 | ? -1 | |
927 | : (int)event->received_msg_list->num_entries), | |
928 | event->socket_closed); | |
929 | ||
930 | /* | |
931 | * independent of the session state | |
932 | */ | |
933 | if (event->socket_closed) { | |
934 | pcep_log( | |
935 | LOG_INFO, | |
936 | "%s: handle_socket_comm_event socket closed for session [%d]", | |
937 | __func__, session->session_id); | |
938 | socket_comm_session_close_tcp(session->socket_comm_session); | |
939 | enqueue_event(session, PCE_CLOSED_SOCKET, NULL); | |
940 | if (session->session_state == SESSION_STATE_PCEP_CONNECTING) { | |
941 | enqueue_event(session, PCC_CONNECTION_FAILURE, NULL); | |
942 | } | |
943 | session->session_state = SESSION_STATE_INITIALIZED; | |
944 | increment_event_counters(session, | |
945 | PCEP_EVENT_COUNTER_ID_PCE_DISCONNECT); | |
946 | return; | |
947 | } | |
948 | ||
949 | reset_dead_timer(session); | |
950 | ||
951 | if (event->received_msg_list == NULL) { | |
952 | return; | |
953 | } | |
954 | ||
955 | /* Message received on socket */ | |
956 | double_linked_list_node *msg_node; | |
957 | for (msg_node = event->received_msg_list->head; msg_node != NULL; | |
958 | msg_node = msg_node->next_node) { | |
959 | bool message_enqueued = false; | |
960 | struct pcep_message *msg = | |
961 | (struct pcep_message *)msg_node->data; | |
962 | pcep_log(LOG_INFO, "%s: \t %s message", __func__, | |
963 | get_message_type_str(msg->msg_header->type)); | |
964 | ||
965 | increment_message_rx_counters(session, msg); | |
966 | ||
967 | switch (msg->msg_header->type) { | |
968 | case PCEP_TYPE_OPEN: | |
969 | /* handle_pcep_open() checks session state, and for | |
970 | * duplicate erroneous open messages, and replies with | |
971 | * error messages as needed. It also sets | |
972 | * pce_open_received. */ | |
973 | if (handle_pcep_open(session, msg) == true) { | |
974 | /* PCE Open Message Accepted */ | |
975 | enqueue_event(session, MESSAGE_RECEIVED, msg); | |
976 | message_enqueued = true; | |
977 | session->pce_open_accepted = true; | |
978 | session->pce_open_rejected = false; | |
979 | if (session->pcc_open_accepted) { | |
980 | /* If both the PCC and PCE Opens are | |
981 | * accepted, then the session is | |
982 | * connected */ | |
983 | ||
984 | check_and_send_open_keep_alive(session); | |
985 | log_pcc_pce_connection(session); | |
986 | session->session_state = | |
987 | SESSION_STATE_PCEP_CONNECTED; | |
988 | increment_event_counters( | |
989 | session, | |
990 | PCEP_EVENT_COUNTER_ID_PCE_CONNECT); | |
991 | enqueue_event(session, | |
992 | PCC_CONNECTED_TO_PCE, | |
993 | NULL); | |
994 | } | |
995 | } | |
996 | break; | |
997 | ||
998 | case PCEP_TYPE_KEEPALIVE: | |
999 | if (session->session_state | |
1000 | == SESSION_STATE_PCEP_CONNECTING) { | |
1001 | /* PCC Open Message Accepted */ | |
1002 | cancel_timer(session->timer_id_open_keep_wait); | |
1003 | session->timer_id_open_keep_wait = | |
1004 | TIMER_ID_NOT_SET; | |
1005 | session->pcc_open_accepted = true; | |
1006 | session->pcc_open_rejected = false; | |
1007 | check_and_send_open_keep_alive(session); | |
1008 | ||
1009 | if (session->pce_open_accepted) { | |
1010 | /* If both the PCC and PCE Opens are | |
1011 | * accepted, then the session is | |
1012 | * connected */ | |
1013 | log_pcc_pce_connection(session); | |
1014 | session->session_state = | |
1015 | SESSION_STATE_PCEP_CONNECTED; | |
1016 | increment_event_counters( | |
1017 | session, | |
1018 | PCEP_EVENT_COUNTER_ID_PCC_CONNECT); | |
1019 | enqueue_event(session, | |
1020 | PCC_CONNECTED_TO_PCE, | |
1021 | NULL); | |
1022 | } | |
1023 | } | |
1024 | /* The dead_timer was already reset above, so nothing | |
1025 | * extra to do here */ | |
1026 | break; | |
1027 | ||
1028 | case PCEP_TYPE_PCREP: | |
1029 | enqueue_event(session, MESSAGE_RECEIVED, msg); | |
1030 | message_enqueued = true; | |
1031 | break; | |
1032 | ||
1033 | case PCEP_TYPE_CLOSE: | |
1034 | session->session_state = SESSION_STATE_INITIALIZED; | |
1035 | socket_comm_session_close_tcp( | |
1036 | session->socket_comm_session); | |
1037 | /* TODO should we also enqueue the message, so they can | |
1038 | * see the reasons?? */ | |
1039 | enqueue_event(session, PCE_SENT_PCEP_CLOSE, NULL); | |
1040 | /* TODO could this duplicate the disconnect counter with | |
1041 | * socket close ?? */ | |
1042 | increment_event_counters( | |
1043 | session, PCEP_EVENT_COUNTER_ID_PCE_DISCONNECT); | |
1044 | break; | |
1045 | ||
1046 | case PCEP_TYPE_PCREQ: | |
1047 | /* The PCC does not support receiving PcReq messages */ | |
1048 | send_pcep_error(session, | |
1049 | PCEP_ERRT_CAPABILITY_NOT_SUPPORTED, | |
1050 | PCEP_ERRV_UNASSIGNED); | |
1051 | break; | |
1052 | ||
1053 | case PCEP_TYPE_REPORT: | |
1054 | /* The PCC does not support receiving Report messages */ | |
1055 | send_pcep_error(session, | |
1056 | PCEP_ERRT_CAPABILITY_NOT_SUPPORTED, | |
1057 | PCEP_ERRV_UNASSIGNED); | |
1058 | break; | |
1059 | ||
1060 | case PCEP_TYPE_UPDATE: | |
1061 | /* Should reply with a PcRpt */ | |
1062 | if (handle_pcep_update(session, msg) == true) { | |
1063 | enqueue_event(session, MESSAGE_RECEIVED, msg); | |
1064 | message_enqueued = true; | |
1065 | } | |
1066 | break; | |
1067 | ||
1068 | case PCEP_TYPE_INITIATE: | |
1069 | /* Should reply with a PcRpt */ | |
1070 | if (handle_pcep_initiate(session, msg) == true) { | |
1071 | enqueue_event(session, MESSAGE_RECEIVED, msg); | |
1072 | message_enqueued = true; | |
1073 | } | |
1074 | break; | |
1075 | ||
1076 | case PCEP_TYPE_PCNOTF: | |
1077 | enqueue_event(session, MESSAGE_RECEIVED, msg); | |
1078 | message_enqueued = true; | |
1079 | break; | |
1080 | ||
1081 | case PCEP_TYPE_ERROR: | |
1082 | if (msg->obj_list != NULL | |
1083 | && msg->obj_list->num_entries > 0) { | |
1084 | struct pcep_object_header *obj_hdr = | |
1085 | pcep_obj_get(msg->obj_list, | |
1086 | PCEP_OBJ_CLASS_ERROR); | |
1087 | if (obj_hdr != NULL) { | |
1088 | struct pcep_object_error *error_obj = | |
1089 | (struct pcep_object_error *) | |
1090 | obj_hdr; | |
1091 | pcep_log( | |
1092 | LOG_DEBUG, | |
1093 | "%s: Error object [type, value] = [%s, %s]", | |
1094 | __func__, | |
1095 | get_error_type_str( | |
1096 | error_obj->error_type), | |
1097 | get_error_value_str( | |
1098 | error_obj->error_type, | |
1099 | error_obj | |
1100 | ->error_value)); | |
1101 | } | |
1102 | } | |
1103 | ||
1104 | if (session->session_state | |
1105 | == SESSION_STATE_PCEP_CONNECTING) { | |
1106 | /* A PCC_CONNECTION_FAILURE event will be sent | |
1107 | * when the socket is closed, if the state is | |
1108 | * SESSION_STATE_PCEP_CONNECTING, in case the | |
1109 | * PCE allows more than 2 failed open messages. | |
1110 | */ | |
1111 | pcep_log(LOG_INFO, | |
1112 | "%s: PCC Open message rejected by PCE", | |
1113 | __func__); | |
1114 | session->pcc_open_rejected = true; | |
1115 | send_reconciled_pcep_open(session, msg); | |
1116 | enqueue_event(session, PCC_SENT_INVALID_OPEN, | |
1117 | NULL); | |
1118 | } | |
1119 | enqueue_event(session, MESSAGE_RECEIVED, msg); | |
1120 | message_enqueued = true; | |
1121 | break; | |
1122 | ||
1123 | default: | |
1124 | pcep_log(LOG_INFO, "%s: \t UnSupported message", | |
1125 | __func__); | |
1126 | send_pcep_error(session, | |
1127 | PCEP_ERRT_CAPABILITY_NOT_SUPPORTED, | |
1128 | PCEP_ERRV_UNASSIGNED); | |
1129 | increment_unknown_message(session); | |
1130 | break; | |
1131 | } | |
1132 | ||
1133 | /* if the message was enqueued, dont free it yet */ | |
1134 | if (message_enqueued == false) { | |
1135 | pcep_msg_free_message(msg); | |
1136 | } | |
1137 | } | |
1138 | dll_destroy(event->received_msg_list); | |
1139 | } |