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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 | ||
fdfa6ecf DS |
245 | case PCEP_OBJ_TLV_TYPE_NO_PATH_VECTOR: |
246 | case PCEP_OBJ_TLV_TYPE_OBJECTIVE_FUNCTION_LIST: | |
247 | case PCEP_OBJ_TLV_TYPE_VENDOR_INFO: | |
248 | case PCEP_OBJ_TLV_TYPE_SYMBOLIC_PATH_NAME: | |
249 | case PCEP_OBJ_TLV_TYPE_IPV4_LSP_IDENTIFIERS: | |
250 | case PCEP_OBJ_TLV_TYPE_IPV6_LSP_IDENTIFIERS: | |
251 | case PCEP_OBJ_TLV_TYPE_LSP_ERROR_CODE: | |
252 | case PCEP_OBJ_TLV_TYPE_RSVP_ERROR_SPEC: | |
253 | case PCEP_OBJ_TLV_TYPE_PATH_SETUP_TYPE: | |
254 | case PCEP_OBJ_TLV_TYPE_SRPOLICY_POL_ID: | |
255 | case PCEP_OBJ_TLV_TYPE_SRPOLICY_POL_NAME: | |
256 | case PCEP_OBJ_TLV_TYPE_SRPOLICY_CPATH_ID: | |
257 | case PCEP_OBJ_TLV_TYPE_SRPOLICY_CPATH_PREFERENCE: | |
258 | case PCEP_OBJ_TLV_TYPE_UNKNOWN: | |
259 | case PCEP_OBJ_TYPE_CISCO_BSID: | |
260 | case PCEP_OBJ_TLV_TYPE_ARBITRARY: | |
74971473 JG |
261 | /* TODO how to handle unrecognized TLV ?? */ |
262 | pcep_log( | |
263 | LOG_INFO, | |
264 | "%s: Unhandled OPEN Object TLV type: %d, length %d", | |
265 | __func__, tlv->type, tlv->encoded_tlv_length); | |
266 | break; | |
267 | } | |
268 | ||
269 | /* Verify the STATEFUL-PCE-CAPABILITY TLV */ | |
270 | if (tlv->type == PCEP_OBJ_TLV_TYPE_STATEFUL_PCE_CAPABILITY) { | |
271 | struct pcep_object_tlv_stateful_pce_capability | |
272 | *pce_cap_tlv = | |
273 | (struct | |
274 | pcep_object_tlv_stateful_pce_capability | |
275 | *)tlv; | |
276 | ||
277 | /* If the U flag is set, then the PCE is | |
278 | * capable of updating LSP parameters */ | |
279 | if (pce_cap_tlv->flag_u_lsp_update_capability) { | |
280 | if (session->pce_config | |
281 | .support_stateful_pce_lsp_update | |
282 | == false) { | |
283 | /* Turn off the U bit, as it is not | |
284 | * supported */ | |
285 | pcep_log( | |
286 | LOG_INFO, | |
287 | "%s: Rejecting unsupported Open STATEFUL-PCE-CAPABILITY TLV U flag", | |
288 | __func__); | |
289 | pce_cap_tlv | |
290 | ->flag_u_lsp_update_capability = | |
291 | false; | |
292 | retval = false; | |
293 | } else { | |
294 | session->stateful_pce = true; | |
295 | pcep_log( | |
296 | LOG_INFO, | |
297 | "%s: Setting PCEP session [%d] STATEFUL to support LSP updates", | |
298 | __func__, session->session_id); | |
299 | } | |
300 | } | |
301 | /* TODO the rest of the flags are not implemented yet */ | |
302 | else if (pce_cap_tlv->flag_s_include_db_version) { | |
303 | pcep_log( | |
304 | LOG_INFO, | |
305 | "%s: Ignoring Open STATEFUL-PCE-CAPABILITY TLV S Include DB Version flag", | |
306 | __func__); | |
307 | } else if ( | |
308 | pce_cap_tlv | |
309 | ->flag_i_lsp_instantiation_capability) { | |
310 | pcep_log( | |
311 | LOG_INFO, | |
312 | "%s: Ignoring Open STATEFUL-PCE-CAPABILITY TLV I LSP Instantiation Capability flag", | |
313 | __func__); | |
314 | } else if (pce_cap_tlv->flag_t_triggered_resync) { | |
315 | pcep_log( | |
316 | LOG_INFO, | |
317 | "%s: Ignoring Open STATEFUL-PCE-CAPABILITY TLV T Triggered Resync flag", | |
318 | __func__); | |
319 | } else if (pce_cap_tlv->flag_d_delta_lsp_sync) { | |
320 | pcep_log( | |
321 | LOG_INFO, | |
322 | "%s: Ignoring Open STATEFUL-PCE-CAPABILITY TLV D Delta LSP Sync flag", | |
323 | __func__); | |
324 | } else if (pce_cap_tlv->flag_f_triggered_initial_sync) { | |
325 | pcep_log( | |
326 | LOG_INFO, | |
327 | "%s: Ignoring Open STATEFUL-PCE-CAPABILITY TLV F Triggered Initial Sync flag", | |
328 | __func__); | |
329 | } | |
330 | } else if (tlv->type == PCEP_OBJ_TLV_TYPE_LSP_DB_VERSION) { | |
331 | if (session->pce_config.support_include_db_version | |
332 | == false) { | |
333 | pcep_log( | |
334 | LOG_INFO, | |
335 | "%s: Rejecting unsupported Open LSP DB VERSION TLV", | |
336 | __func__); | |
337 | /* Remove this TLV from the list */ | |
338 | dll_delete_node(open_object->header.tlv_list, | |
339 | tlv_node); | |
340 | retval = false; | |
341 | } | |
342 | } | |
343 | } | |
344 | ||
345 | return retval; | |
346 | } | |
347 | ||
348 | ||
349 | bool handle_pcep_open(pcep_session *session, struct pcep_message *open_msg) | |
350 | { | |
351 | /* Open Message validation and errors according to: | |
352 | * https://tools.ietf.org/html/rfc5440#section-7.15 */ | |
353 | ||
354 | if (session->session_state != SESSION_STATE_PCEP_CONNECTING | |
355 | && session->session_state != SESSION_STATE_INITIALIZED) { | |
356 | pcep_log( | |
357 | LOG_INFO, | |
358 | "%s: Received unexpected OPEN, current session state [%d, replying with error]", | |
359 | __func__, session->session_state); | |
360 | send_pcep_error(session, | |
361 | PCEP_ERRT_ATTEMPT_TO_ESTABLISH_2ND_PCEP_SESSION, | |
362 | PCEP_ERRV_RECVD_INVALID_OPEN_MSG); | |
363 | return false; | |
364 | } | |
365 | ||
366 | if (session->pce_open_received == true | |
367 | && session->pce_open_rejected == false) { | |
368 | pcep_log(LOG_INFO, | |
369 | "%s: Received duplicate OPEN, replying with error", | |
370 | __func__); | |
371 | send_pcep_error(session, | |
372 | PCEP_ERRT_ATTEMPT_TO_ESTABLISH_2ND_PCEP_SESSION, | |
373 | PCEP_ERRV_RECVD_INVALID_OPEN_MSG); | |
374 | return false; | |
375 | } | |
376 | ||
377 | struct pcep_object_open *open_object = | |
378 | (struct pcep_object_open *)pcep_obj_get(open_msg->obj_list, | |
379 | PCEP_OBJ_CLASS_OPEN); | |
380 | if (open_object == NULL) { | |
381 | pcep_log( | |
382 | LOG_INFO, | |
383 | "%s: Received OPEN message with no OPEN object, replying with error", | |
384 | __func__); | |
385 | send_pcep_error(session, PCEP_ERRT_SESSION_FAILURE, | |
386 | PCEP_ERRV_RECVD_INVALID_OPEN_MSG); | |
387 | return false; | |
388 | } | |
389 | ||
390 | /* Check for additional Open Msg objects */ | |
391 | if (open_msg->obj_list->num_entries > 1) { | |
392 | pcep_log( | |
393 | LOG_INFO, | |
394 | "%s: Found additional unsupported objects in the Open message, replying with error", | |
395 | __func__); | |
396 | send_pcep_error(session, PCEP_ERRT_SESSION_FAILURE, | |
397 | PCEP_ERRV_RECVD_INVALID_OPEN_MSG); | |
398 | return false; | |
399 | } | |
400 | ||
401 | session->pce_open_received = true; | |
402 | ||
403 | /* Verify the open object parameters and TLVs */ | |
404 | if (verify_pcep_open_object(session, open_object) == false) { | |
405 | enqueue_event(session, PCC_RCVD_INVALID_OPEN, NULL); | |
406 | if (session->pce_open_rejected) { | |
407 | /* The Open message was already rejected once, so | |
408 | * according to the spec, send an error message and | |
409 | * close the TCP connection. */ | |
410 | pcep_log( | |
411 | LOG_INFO, | |
412 | "%s: Received 2 consecutive unsupported Open messages, closing the connection.", | |
413 | __func__); | |
414 | send_pcep_error( | |
415 | session, PCEP_ERRT_SESSION_FAILURE, | |
416 | PCEP_ERRV_RECVD_SECOND_OPEN_MSG_UNACCEPTABLE); | |
417 | socket_comm_session_close_tcp_after_write( | |
418 | session->socket_comm_session); | |
419 | session->session_state = SESSION_STATE_INITIALIZED; | |
420 | enqueue_event(session, PCC_CONNECTION_FAILURE, NULL); | |
421 | } else { | |
422 | session->pce_open_rejected = true; | |
423 | /* Clone the object here, since the encapsulating | |
424 | * message will be deleted in handle_socket_comm_event() | |
425 | * most likely before this error message is sent */ | |
426 | struct pcep_object_open *cloned_open_object = | |
427 | pceplib_malloc(PCEPLIB_MESSAGES, | |
428 | sizeof(struct pcep_object_open)); | |
429 | memcpy(cloned_open_object, open_object, | |
430 | sizeof(struct pcep_object_open)); | |
431 | open_object->header.tlv_list = NULL; | |
432 | cloned_open_object->header.encoded_object = NULL; | |
433 | cloned_open_object->header.encoded_object_length = 0; | |
434 | send_pcep_error_with_object( | |
435 | session, PCEP_ERRT_SESSION_FAILURE, | |
436 | PCEP_ERRV_UNACCEPTABLE_OPEN_MSG_NEG, | |
437 | &cloned_open_object->header); | |
438 | } | |
439 | ||
440 | return false; | |
441 | } | |
442 | ||
443 | /* | |
444 | * Open Message accepted | |
445 | * Sending the keep-alive response will be managed the function caller | |
446 | */ | |
447 | ||
448 | session->timer_id_open_keep_alive = | |
449 | create_timer(TIMER_OPEN_KEEP_ALIVE_SECONDS, session); | |
450 | session->pcc_config.dead_timer_pce_negotiated_seconds = | |
451 | (int)open_object->open_deadtimer; | |
452 | /* Cancel the timer so we can change the dead_timer value */ | |
453 | cancel_timer(session->timer_id_dead_timer); | |
454 | session->timer_id_dead_timer = TIMER_ID_NOT_SET; | |
455 | reset_dead_timer(session); | |
456 | ||
457 | return true; | |
458 | } | |
459 | ||
460 | ||
461 | /* The original PCEP Open message sent to the PCE was rejected, | |
462 | * try to reconcile the differences and re-send a new Open. */ | |
463 | void send_reconciled_pcep_open(pcep_session *session, | |
464 | struct pcep_message *error_msg) | |
465 | { | |
466 | struct pcep_message *open_msg = create_pcep_open(session); | |
467 | ||
468 | struct pcep_object_open *error_open_obj = | |
469 | (struct pcep_object_open *)pcep_obj_get(error_msg->obj_list, | |
470 | PCEP_OBJ_CLASS_OPEN); | |
471 | if (error_open_obj == NULL) { | |
472 | /* Nothing to reconcile, send the same Open message again */ | |
473 | pcep_log( | |
474 | LOG_INFO, | |
475 | "%s: No Open object received in Error, sending the same Open message", | |
476 | __func__); | |
477 | session_send_message(session, open_msg); | |
478 | return; | |
479 | } | |
480 | ||
481 | struct pcep_object_open *open_obj = | |
482 | (struct pcep_object_open *)pcep_obj_get(open_msg->obj_list, | |
483 | PCEP_OBJ_CLASS_OPEN); | |
7ed8c4b1 JG |
484 | // open_msg can not have empty obj_list |
485 | assert(open_obj != NULL); | |
74971473 JG |
486 | |
487 | if (error_open_obj->open_deadtimer | |
488 | != session->pce_config.dead_timer_seconds) { | |
489 | if (error_open_obj->open_deadtimer | |
490 | >= session->pce_config.min_dead_timer_seconds | |
491 | && error_open_obj->open_deadtimer | |
492 | <= session->pce_config.max_dead_timer_seconds) { | |
493 | open_obj->open_deadtimer = | |
494 | error_open_obj->open_deadtimer; | |
495 | session->pcc_config.dead_timer_pce_negotiated_seconds = | |
496 | error_open_obj->open_deadtimer; | |
497 | pcep_log( | |
498 | LOG_INFO, | |
499 | "%s: Open deadtimer value [%d] rejected, using PCE value [%d]", | |
500 | __func__, | |
501 | session->pcc_config.dead_timer_seconds, | |
502 | session->pcc_config | |
503 | .dead_timer_pce_negotiated_seconds); | |
504 | /* Reset the timer with the new value */ | |
505 | cancel_timer(session->timer_id_dead_timer); | |
506 | session->timer_id_dead_timer = TIMER_ID_NOT_SET; | |
507 | reset_dead_timer(session); | |
508 | } else { | |
509 | pcep_log( | |
510 | LOG_INFO, | |
511 | "%s: Can not reconcile Open with suggested deadtimer [%d]", | |
512 | __func__, error_open_obj->open_deadtimer); | |
513 | } | |
514 | } | |
515 | ||
516 | if (error_open_obj->open_keepalive | |
517 | != session->pce_config.keep_alive_seconds) { | |
518 | if (error_open_obj->open_keepalive | |
519 | >= session->pce_config.min_keep_alive_seconds | |
520 | && error_open_obj->open_keepalive | |
521 | <= session->pce_config.max_keep_alive_seconds) { | |
522 | open_obj->open_keepalive = | |
523 | error_open_obj->open_keepalive; | |
524 | session->pcc_config | |
525 | .keep_alive_pce_negotiated_timer_seconds = | |
526 | error_open_obj->open_keepalive; | |
527 | pcep_log( | |
528 | LOG_INFO, | |
529 | "%s: Open keep alive value [%d] rejected, using PCE value [%d]", | |
530 | __func__, | |
531 | session->pcc_config.keep_alive_seconds, | |
532 | session->pcc_config | |
533 | .keep_alive_pce_negotiated_timer_seconds); | |
534 | /* Cancel the timer, the timer will be set again with | |
535 | * the new value when this open message is sent */ | |
536 | cancel_timer(session->timer_id_keep_alive); | |
537 | session->timer_id_keep_alive = TIMER_ID_NOT_SET; | |
538 | } else { | |
539 | pcep_log( | |
540 | LOG_INFO, | |
541 | "%s: Can not reconcile Open with suggested keepalive [%d]", | |
542 | __func__, error_open_obj->open_keepalive); | |
543 | } | |
544 | } | |
545 | ||
546 | /* TODO reconcile the TLVs */ | |
547 | ||
548 | session_send_message(session, open_msg); | |
549 | reset_timer(session->timer_id_open_keep_alive); | |
550 | } | |
551 | ||
552 | ||
553 | bool handle_pcep_update(pcep_session *session, struct pcep_message *upd_msg) | |
554 | { | |
555 | /* Update Message validation and errors according to: | |
556 | * https://tools.ietf.org/html/rfc8231#section-6.2 */ | |
557 | ||
558 | if (upd_msg->obj_list == NULL) { | |
559 | pcep_log(LOG_INFO, | |
560 | "%s: Invalid PcUpd message: Message has no objects", | |
561 | __func__); | |
562 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
563 | PCEP_ERRV_SRP_OBJECT_MISSING); | |
564 | return false; | |
565 | } | |
566 | ||
567 | /* Verify the mandatory objects are present */ | |
568 | struct pcep_object_header *obj = | |
569 | pcep_obj_get(upd_msg->obj_list, PCEP_OBJ_CLASS_SRP); | |
570 | if (obj == NULL) { | |
571 | pcep_log(LOG_INFO, | |
572 | "%s: Invalid PcUpd message: Missing SRP object", | |
573 | __func__); | |
574 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
575 | PCEP_ERRV_SRP_OBJECT_MISSING); | |
576 | return false; | |
577 | } | |
578 | ||
579 | obj = pcep_obj_get(upd_msg->obj_list, PCEP_OBJ_CLASS_LSP); | |
580 | if (obj == NULL) { | |
581 | pcep_log(LOG_INFO, | |
582 | "%s: Invalid PcUpd message: Missing LSP object", | |
583 | __func__); | |
584 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
585 | PCEP_ERRV_LSP_OBJECT_MISSING); | |
586 | return false; | |
587 | } | |
588 | ||
589 | obj = pcep_obj_get(upd_msg->obj_list, PCEP_OBJ_CLASS_ERO); | |
590 | if (obj == NULL) { | |
591 | pcep_log(LOG_INFO, | |
592 | "%s: Invalid PcUpd message: Missing ERO object", | |
593 | __func__); | |
594 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
595 | PCEP_ERRV_ERO_OBJECT_MISSING); | |
596 | return false; | |
597 | } | |
598 | ||
599 | /* Verify the objects are are in the correct order */ | |
600 | double_linked_list_node *node = upd_msg->obj_list->head; | |
601 | struct pcep_object_srp *srp_object = | |
602 | (struct pcep_object_srp *)node->data; | |
603 | if (srp_object->header.object_class != PCEP_OBJ_CLASS_SRP) { | |
604 | pcep_log( | |
605 | LOG_INFO, | |
606 | "%s: Invalid PcUpd message: First object must be an SRP, found [%d]", | |
607 | __func__, srp_object->header.object_class); | |
608 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
609 | PCEP_ERRV_SRP_OBJECT_MISSING); | |
610 | return false; | |
611 | } | |
612 | ||
613 | node = node->next_node; | |
614 | struct pcep_object_lsp *lsp_object = | |
615 | (struct pcep_object_lsp *)node->data; | |
616 | if (lsp_object->header.object_class != PCEP_OBJ_CLASS_LSP) { | |
617 | pcep_log( | |
618 | LOG_INFO, | |
619 | "%s: Invalid PcUpd message: Second object must be an LSP, found [%d]", | |
620 | __func__, lsp_object->header.object_class); | |
621 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
622 | PCEP_ERRV_LSP_OBJECT_MISSING); | |
623 | return false; | |
624 | } | |
625 | ||
626 | node = node->next_node; | |
627 | struct pcep_object_ro *ero_object = node->data; | |
628 | if (ero_object->header.object_class != PCEP_OBJ_CLASS_ERO) { | |
629 | pcep_log( | |
630 | LOG_INFO, | |
631 | "%s: Invalid PcUpd message: Third object must be an ERO, found [%d]", | |
632 | __func__, ero_object->header.object_class); | |
633 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
634 | PCEP_ERRV_ERO_OBJECT_MISSING); | |
635 | return false; | |
636 | } | |
637 | ||
638 | return true; | |
639 | } | |
640 | ||
641 | bool handle_pcep_initiate(pcep_session *session, struct pcep_message *init_msg) | |
642 | { | |
643 | /* Instantiate Message validation and errors according to: | |
644 | * https://tools.ietf.org/html/rfc8281#section-5 */ | |
645 | ||
646 | if (init_msg->obj_list == NULL) { | |
647 | pcep_log( | |
648 | LOG_INFO, | |
649 | "%s: Invalid PcInitiate message: Message has no objects", | |
650 | __func__); | |
651 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
652 | PCEP_ERRV_SRP_OBJECT_MISSING); | |
653 | return false; | |
654 | } | |
655 | ||
656 | /* Verify the mandatory objects are present */ | |
657 | struct pcep_object_header *obj = | |
658 | pcep_obj_get(init_msg->obj_list, PCEP_OBJ_CLASS_SRP); | |
659 | if (obj == NULL) { | |
660 | pcep_log(LOG_INFO, | |
661 | "%s: Invalid PcInitiate message: Missing SRP object", | |
662 | __func__); | |
663 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
664 | PCEP_ERRV_SRP_OBJECT_MISSING); | |
665 | return false; | |
666 | } | |
667 | ||
668 | obj = pcep_obj_get(init_msg->obj_list, PCEP_OBJ_CLASS_LSP); | |
669 | if (obj == NULL) { | |
670 | pcep_log(LOG_INFO, | |
671 | "%s: Invalid PcInitiate message: Missing LSP object", | |
672 | __func__); | |
673 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
674 | PCEP_ERRV_LSP_OBJECT_MISSING); | |
675 | return false; | |
676 | } | |
677 | ||
678 | /* Verify the objects are are in the correct order */ | |
679 | double_linked_list_node *node = init_msg->obj_list->head; | |
680 | struct pcep_object_srp *srp_object = | |
681 | (struct pcep_object_srp *)node->data; | |
682 | if (srp_object->header.object_class != PCEP_OBJ_CLASS_SRP) { | |
683 | pcep_log( | |
684 | LOG_INFO, | |
685 | "%s: Invalid PcInitiate message: First object must be an SRP, found [%d]", | |
686 | __func__, srp_object->header.object_class); | |
687 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
688 | PCEP_ERRV_SRP_OBJECT_MISSING); | |
689 | return false; | |
690 | } | |
691 | ||
692 | node = node->next_node; | |
693 | struct pcep_object_lsp *lsp_object = | |
694 | (struct pcep_object_lsp *)node->data; | |
695 | if (lsp_object->header.object_class != PCEP_OBJ_CLASS_LSP) { | |
696 | pcep_log( | |
697 | LOG_INFO, | |
698 | "%s: Invalid PcInitiate message: Second object must be an LSP, found [%d]", | |
699 | __func__, lsp_object->header.object_class); | |
700 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
701 | PCEP_ERRV_LSP_OBJECT_MISSING); | |
702 | return false; | |
703 | } | |
704 | ||
705 | /* There may be more optional objects */ | |
706 | return true; | |
707 | } | |
708 | ||
709 | void increment_unknown_message(pcep_session *session) | |
710 | { | |
711 | /* https://tools.ietf.org/html/rfc5440#section-6.9 | |
712 | * If a PCC/PCE receives unrecognized messages at a rate equal or | |
713 | * greater than MAX-UNKNOWN-MESSAGES unknown message requests per | |
714 | * minute, the PCC/PCE MUST send a PCEP CLOSE message */ | |
715 | ||
716 | time_t *unknown_message_time = | |
717 | pceplib_malloc(PCEPLIB_INFRA, sizeof(time_t)); | |
718 | *unknown_message_time = time(NULL); | |
719 | time_t expire_time = *unknown_message_time + 60; | |
720 | queue_enqueue(session->num_unknown_messages_time_queue, | |
721 | unknown_message_time); | |
722 | ||
723 | /* Purge any entries older than 1 minute. The oldest entries are at the | |
724 | * queue head */ | |
725 | queue_node *time_node = session->num_unknown_messages_time_queue->head; | |
726 | while (time_node != NULL) { | |
727 | if (*((time_t *)time_node->data) > expire_time) { | |
728 | pceplib_free( | |
729 | PCEPLIB_INFRA, | |
730 | queue_dequeue( | |
731 | session->num_unknown_messages_time_queue)); | |
732 | time_node = | |
733 | session->num_unknown_messages_time_queue->head; | |
734 | } else { | |
735 | time_node = NULL; | |
736 | } | |
737 | } | |
738 | ||
739 | if ((int)session->num_unknown_messages_time_queue->num_entries | |
740 | >= session->pcc_config.max_unknown_messages) { | |
741 | pcep_log( | |
742 | LOG_INFO, | |
743 | "%s: [%ld-%ld] Max unknown messages reached [%d] closing session [%d]", | |
744 | __func__, time(NULL), pthread_self(), | |
745 | session->pcc_config.max_unknown_messages, | |
746 | session->session_id); | |
747 | ||
748 | close_pcep_session_with_reason(session, | |
749 | PCEP_CLOSE_REASON_UNREC_MSG); | |
750 | enqueue_event(session, PCC_RCVD_MAX_UNKOWN_MSGS, NULL); | |
751 | } | |
752 | } | |
753 | ||
754 | bool check_and_send_open_keep_alive(pcep_session *session) | |
755 | { | |
756 | if (session->pce_open_received == true | |
757 | && session->pce_open_rejected == false | |
758 | && session->pce_open_keep_alive_sent == false) { | |
759 | /* Send the PCE Open keep-alive response if it hasnt been sent | |
760 | * yet */ | |
761 | cancel_timer(session->timer_id_open_keep_alive); | |
762 | session->timer_id_open_keep_alive = TIMER_ID_NOT_SET; | |
763 | send_keep_alive(session); | |
764 | session->pce_open_keep_alive_sent = true; | |
765 | ||
766 | return true; | |
767 | } | |
768 | ||
769 | return false; | |
770 | } | |
771 | ||
772 | void log_pcc_pce_connection(pcep_session *session) | |
773 | { | |
774 | if (session->socket_comm_session == NULL) { | |
775 | /* This only happens in UT */ | |
776 | return; | |
777 | } | |
778 | ||
779 | char src_ip_buf[40] = {0}, dst_ip_buf[40] = {0}; | |
780 | uint16_t src_port, dst_port; | |
781 | ||
782 | if (session->socket_comm_session->is_ipv6) { | |
783 | inet_ntop(AF_INET6, | |
784 | &session->socket_comm_session->src_sock_addr | |
785 | .src_sock_addr_ipv6.sin6_addr, | |
786 | src_ip_buf, sizeof(src_ip_buf)); | |
787 | inet_ntop(AF_INET6, | |
788 | &session->socket_comm_session->dest_sock_addr | |
789 | .dest_sock_addr_ipv6.sin6_addr, | |
790 | dst_ip_buf, sizeof(dst_ip_buf)); | |
791 | src_port = htons(session->socket_comm_session->src_sock_addr | |
792 | .src_sock_addr_ipv6.sin6_port); | |
793 | dst_port = htons(session->socket_comm_session->dest_sock_addr | |
794 | .dest_sock_addr_ipv6.sin6_port); | |
795 | } else { | |
796 | inet_ntop(AF_INET, | |
797 | &session->socket_comm_session->src_sock_addr | |
798 | .src_sock_addr_ipv4.sin_addr, | |
799 | src_ip_buf, sizeof(src_ip_buf)); | |
800 | inet_ntop(AF_INET, | |
801 | &session->socket_comm_session->dest_sock_addr | |
802 | .dest_sock_addr_ipv4.sin_addr, | |
803 | dst_ip_buf, sizeof(dst_ip_buf)); | |
804 | src_port = htons(session->socket_comm_session->src_sock_addr | |
805 | .src_sock_addr_ipv4.sin_port); | |
806 | dst_port = htons(session->socket_comm_session->dest_sock_addr | |
807 | .dest_sock_addr_ipv4.sin_port); | |
808 | } | |
809 | ||
810 | pcep_log( | |
811 | LOG_INFO, | |
812 | "%s: [%ld-%ld] Successful PCC [%s:%d] connection to PCE [%s:%d] session [%d] fd [%d]", | |
813 | __func__, time(NULL), pthread_self(), src_ip_buf, src_port, | |
814 | dst_ip_buf, dst_port, session->session_id, | |
815 | session->socket_comm_session->socket_fd); | |
816 | } | |
817 | ||
818 | /* | |
819 | * these functions are called by session_logic_loop() from | |
820 | * pcep_session_logic_loop.c these functions are executed in the | |
821 | * session_logic_loop thread, and the mutex is locked before calling these | |
822 | * functions, so they are thread safe. | |
823 | */ | |
824 | ||
825 | /* state machine handling for expired timers */ | |
826 | void handle_timer_event(pcep_session_event *event) | |
827 | { | |
828 | if (event == NULL) { | |
829 | pcep_log(LOG_INFO, "%s: handle_timer_event NULL event", | |
830 | __func__); | |
831 | return; | |
832 | } | |
833 | ||
834 | pcep_session *session = event->session; | |
835 | ||
836 | pcep_log( | |
837 | LOG_INFO, | |
d85bf6f1 | 838 | "%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 |
839 | __func__, time(NULL), pthread_self(), session->session_id, |
840 | event->expired_timer_id, session->timer_id_open_keep_wait, | |
841 | session->timer_id_open_keep_alive, session->timer_id_dead_timer, | |
842 | session->timer_id_keep_alive); | |
843 | ||
844 | /* | |
845 | * these timer expirations are independent of the session state | |
846 | */ | |
847 | if (event->expired_timer_id == session->timer_id_dead_timer) { | |
848 | session->timer_id_dead_timer = TIMER_ID_NOT_SET; | |
849 | increment_event_counters(session, | |
850 | PCEP_EVENT_COUNTER_ID_TIMER_DEADTIMER); | |
851 | close_pcep_session_with_reason(session, | |
852 | PCEP_CLOSE_REASON_DEADTIMER); | |
853 | enqueue_event(session, PCE_DEAD_TIMER_EXPIRED, NULL); | |
854 | return; | |
855 | } else if (event->expired_timer_id == session->timer_id_keep_alive) { | |
856 | session->timer_id_keep_alive = TIMER_ID_NOT_SET; | |
857 | increment_event_counters(session, | |
858 | PCEP_EVENT_COUNTER_ID_TIMER_KEEPALIVE); | |
859 | send_keep_alive(session); | |
860 | return; | |
861 | } | |
862 | ||
863 | /* | |
864 | * handle timers that depend on the session state | |
865 | */ | |
866 | switch (session->session_state) { | |
867 | case SESSION_STATE_PCEP_CONNECTING: | |
868 | if (event->expired_timer_id | |
869 | == session->timer_id_open_keep_wait) { | |
870 | /* close the TCP session */ | |
871 | pcep_log( | |
872 | LOG_INFO, | |
873 | "%s: handle_timer_event open_keep_wait timer expired for session [%d]", | |
874 | __func__, session->session_id); | |
875 | increment_event_counters( | |
876 | session, | |
877 | PCEP_EVENT_COUNTER_ID_TIMER_OPENKEEPWAIT); | |
878 | socket_comm_session_close_tcp_after_write( | |
879 | session->socket_comm_session); | |
880 | session->session_state = SESSION_STATE_INITIALIZED; | |
881 | session->timer_id_open_keep_wait = TIMER_ID_NOT_SET; | |
882 | enqueue_event(session, PCE_OPEN_KEEP_WAIT_TIMER_EXPIRED, | |
883 | NULL); | |
884 | } | |
885 | ||
886 | if (event->expired_timer_id | |
887 | == session->timer_id_open_keep_alive) { | |
888 | increment_event_counters( | |
889 | session, | |
890 | PCEP_EVENT_COUNTER_ID_TIMER_OPENKEEPALIVE); | |
891 | session->timer_id_open_keep_alive = TIMER_ID_NOT_SET; | |
892 | if (check_and_send_open_keep_alive(session) == true) { | |
893 | if (session->pcc_open_accepted == true | |
894 | && session->session_state | |
895 | != SESSION_STATE_PCEP_CONNECTED) { | |
896 | log_pcc_pce_connection(session); | |
897 | session->session_state = | |
898 | SESSION_STATE_PCEP_CONNECTED; | |
899 | increment_event_counters( | |
900 | session, | |
901 | PCEP_EVENT_COUNTER_ID_PCE_CONNECT); | |
902 | enqueue_event(session, | |
903 | PCC_CONNECTED_TO_PCE, | |
904 | NULL); | |
905 | } | |
906 | } | |
907 | return; | |
908 | } | |
909 | break; | |
910 | ||
911 | case SESSION_STATE_INITIALIZED: | |
912 | case SESSION_STATE_PCEP_CONNECTED: | |
fdfa6ecf | 913 | case SESSION_STATE_UNKNOWN: |
74971473 JG |
914 | pcep_log( |
915 | LOG_INFO, | |
916 | "%s: handle_timer_event unrecognized state transition, timer_id [%d] state [%d] session [%d]", | |
917 | __func__, event->expired_timer_id, | |
918 | session->session_state, session->session_id); | |
919 | break; | |
920 | } | |
921 | } | |
922 | ||
923 | /* State machine handling for received messages. | |
924 | * This event was created in session_logic_msg_ready_handler() in | |
925 | * pcep_session_logic_loop.c */ | |
926 | void handle_socket_comm_event(pcep_session_event *event) | |
927 | { | |
928 | if (event == NULL) { | |
929 | pcep_log(LOG_INFO, "%s: handle_socket_comm_event NULL event", | |
930 | __func__); | |
931 | return; | |
932 | } | |
933 | ||
934 | pcep_session *session = event->session; | |
935 | ||
936 | pcep_log( | |
937 | LOG_INFO, | |
938 | "%s: [%ld-%ld] pcep_session_logic handle_socket_comm_event: session [%d] num messages [%d] socket_closed [%d]", | |
939 | __func__, time(NULL), pthread_self(), session->session_id, | |
940 | (event->received_msg_list == NULL | |
941 | ? -1 | |
942 | : (int)event->received_msg_list->num_entries), | |
943 | event->socket_closed); | |
944 | ||
945 | /* | |
946 | * independent of the session state | |
947 | */ | |
948 | if (event->socket_closed) { | |
949 | pcep_log( | |
950 | LOG_INFO, | |
951 | "%s: handle_socket_comm_event socket closed for session [%d]", | |
952 | __func__, session->session_id); | |
953 | socket_comm_session_close_tcp(session->socket_comm_session); | |
954 | enqueue_event(session, PCE_CLOSED_SOCKET, NULL); | |
955 | if (session->session_state == SESSION_STATE_PCEP_CONNECTING) { | |
956 | enqueue_event(session, PCC_CONNECTION_FAILURE, NULL); | |
957 | } | |
958 | session->session_state = SESSION_STATE_INITIALIZED; | |
959 | increment_event_counters(session, | |
960 | PCEP_EVENT_COUNTER_ID_PCE_DISCONNECT); | |
961 | return; | |
962 | } | |
963 | ||
964 | reset_dead_timer(session); | |
965 | ||
966 | if (event->received_msg_list == NULL) { | |
967 | return; | |
968 | } | |
969 | ||
970 | /* Message received on socket */ | |
971 | double_linked_list_node *msg_node; | |
972 | for (msg_node = event->received_msg_list->head; msg_node != NULL; | |
973 | msg_node = msg_node->next_node) { | |
974 | bool message_enqueued = false; | |
975 | struct pcep_message *msg = | |
976 | (struct pcep_message *)msg_node->data; | |
977 | pcep_log(LOG_INFO, "%s: \t %s message", __func__, | |
978 | get_message_type_str(msg->msg_header->type)); | |
979 | ||
980 | increment_message_rx_counters(session, msg); | |
981 | ||
982 | switch (msg->msg_header->type) { | |
983 | case PCEP_TYPE_OPEN: | |
984 | /* handle_pcep_open() checks session state, and for | |
985 | * duplicate erroneous open messages, and replies with | |
986 | * error messages as needed. It also sets | |
987 | * pce_open_received. */ | |
988 | if (handle_pcep_open(session, msg) == true) { | |
989 | /* PCE Open Message Accepted */ | |
990 | enqueue_event(session, MESSAGE_RECEIVED, msg); | |
991 | message_enqueued = true; | |
992 | session->pce_open_accepted = true; | |
993 | session->pce_open_rejected = false; | |
994 | if (session->pcc_open_accepted) { | |
995 | /* If both the PCC and PCE Opens are | |
996 | * accepted, then the session is | |
997 | * connected */ | |
998 | ||
999 | check_and_send_open_keep_alive(session); | |
1000 | log_pcc_pce_connection(session); | |
1001 | session->session_state = | |
1002 | SESSION_STATE_PCEP_CONNECTED; | |
1003 | increment_event_counters( | |
1004 | session, | |
1005 | PCEP_EVENT_COUNTER_ID_PCE_CONNECT); | |
1006 | enqueue_event(session, | |
1007 | PCC_CONNECTED_TO_PCE, | |
1008 | NULL); | |
1009 | } | |
1010 | } | |
1011 | break; | |
1012 | ||
1013 | case PCEP_TYPE_KEEPALIVE: | |
1014 | if (session->session_state | |
1015 | == SESSION_STATE_PCEP_CONNECTING) { | |
1016 | /* PCC Open Message Accepted */ | |
1017 | cancel_timer(session->timer_id_open_keep_wait); | |
1018 | session->timer_id_open_keep_wait = | |
1019 | TIMER_ID_NOT_SET; | |
1020 | session->pcc_open_accepted = true; | |
1021 | session->pcc_open_rejected = false; | |
1022 | check_and_send_open_keep_alive(session); | |
1023 | ||
1024 | if (session->pce_open_accepted) { | |
1025 | /* If both the PCC and PCE Opens are | |
1026 | * accepted, then the session is | |
1027 | * connected */ | |
1028 | log_pcc_pce_connection(session); | |
1029 | session->session_state = | |
1030 | SESSION_STATE_PCEP_CONNECTED; | |
1031 | increment_event_counters( | |
1032 | session, | |
1033 | PCEP_EVENT_COUNTER_ID_PCC_CONNECT); | |
1034 | enqueue_event(session, | |
1035 | PCC_CONNECTED_TO_PCE, | |
1036 | NULL); | |
1037 | } | |
1038 | } | |
1039 | /* The dead_timer was already reset above, so nothing | |
1040 | * extra to do here */ | |
1041 | break; | |
1042 | ||
1043 | case PCEP_TYPE_PCREP: | |
1044 | enqueue_event(session, MESSAGE_RECEIVED, msg); | |
1045 | message_enqueued = true; | |
1046 | break; | |
1047 | ||
1048 | case PCEP_TYPE_CLOSE: | |
1049 | session->session_state = SESSION_STATE_INITIALIZED; | |
1050 | socket_comm_session_close_tcp( | |
1051 | session->socket_comm_session); | |
1052 | /* TODO should we also enqueue the message, so they can | |
1053 | * see the reasons?? */ | |
1054 | enqueue_event(session, PCE_SENT_PCEP_CLOSE, NULL); | |
1055 | /* TODO could this duplicate the disconnect counter with | |
1056 | * socket close ?? */ | |
1057 | increment_event_counters( | |
1058 | session, PCEP_EVENT_COUNTER_ID_PCE_DISCONNECT); | |
1059 | break; | |
1060 | ||
1061 | case PCEP_TYPE_PCREQ: | |
1062 | /* The PCC does not support receiving PcReq messages */ | |
1063 | send_pcep_error(session, | |
1064 | PCEP_ERRT_CAPABILITY_NOT_SUPPORTED, | |
1065 | PCEP_ERRV_UNASSIGNED); | |
1066 | break; | |
1067 | ||
1068 | case PCEP_TYPE_REPORT: | |
1069 | /* The PCC does not support receiving Report messages */ | |
1070 | send_pcep_error(session, | |
1071 | PCEP_ERRT_CAPABILITY_NOT_SUPPORTED, | |
1072 | PCEP_ERRV_UNASSIGNED); | |
1073 | break; | |
1074 | ||
1075 | case PCEP_TYPE_UPDATE: | |
1076 | /* Should reply with a PcRpt */ | |
1077 | if (handle_pcep_update(session, msg) == true) { | |
1078 | enqueue_event(session, MESSAGE_RECEIVED, msg); | |
1079 | message_enqueued = true; | |
1080 | } | |
1081 | break; | |
1082 | ||
1083 | case PCEP_TYPE_INITIATE: | |
1084 | /* Should reply with a PcRpt */ | |
1085 | if (handle_pcep_initiate(session, msg) == true) { | |
1086 | enqueue_event(session, MESSAGE_RECEIVED, msg); | |
1087 | message_enqueued = true; | |
1088 | } | |
1089 | break; | |
1090 | ||
1091 | case PCEP_TYPE_PCNOTF: | |
1092 | enqueue_event(session, MESSAGE_RECEIVED, msg); | |
1093 | message_enqueued = true; | |
1094 | break; | |
1095 | ||
1096 | case PCEP_TYPE_ERROR: | |
1097 | if (msg->obj_list != NULL | |
1098 | && msg->obj_list->num_entries > 0) { | |
1099 | struct pcep_object_header *obj_hdr = | |
1100 | pcep_obj_get(msg->obj_list, | |
1101 | PCEP_OBJ_CLASS_ERROR); | |
1102 | if (obj_hdr != NULL) { | |
1103 | struct pcep_object_error *error_obj = | |
1104 | (struct pcep_object_error *) | |
1105 | obj_hdr; | |
1106 | pcep_log( | |
1107 | LOG_DEBUG, | |
1108 | "%s: Error object [type, value] = [%s, %s]", | |
1109 | __func__, | |
1110 | get_error_type_str( | |
1111 | error_obj->error_type), | |
1112 | get_error_value_str( | |
1113 | error_obj->error_type, | |
1114 | error_obj | |
1115 | ->error_value)); | |
1116 | } | |
1117 | } | |
1118 | ||
1119 | if (session->session_state | |
1120 | == SESSION_STATE_PCEP_CONNECTING) { | |
1121 | /* A PCC_CONNECTION_FAILURE event will be sent | |
1122 | * when the socket is closed, if the state is | |
1123 | * SESSION_STATE_PCEP_CONNECTING, in case the | |
1124 | * PCE allows more than 2 failed open messages. | |
1125 | */ | |
1126 | pcep_log(LOG_INFO, | |
1127 | "%s: PCC Open message rejected by PCE", | |
1128 | __func__); | |
1129 | session->pcc_open_rejected = true; | |
1130 | send_reconciled_pcep_open(session, msg); | |
1131 | enqueue_event(session, PCC_SENT_INVALID_OPEN, | |
1132 | NULL); | |
1133 | } | |
1134 | enqueue_event(session, MESSAGE_RECEIVED, msg); | |
1135 | message_enqueued = true; | |
1136 | break; | |
1137 | ||
fdfa6ecf DS |
1138 | case PCEP_TYPE_START_TLS: |
1139 | case PCEP_TYPE_MAX: | |
74971473 JG |
1140 | pcep_log(LOG_INFO, "%s: \t UnSupported message", |
1141 | __func__); | |
1142 | send_pcep_error(session, | |
1143 | PCEP_ERRT_CAPABILITY_NOT_SUPPORTED, | |
1144 | PCEP_ERRV_UNASSIGNED); | |
1145 | increment_unknown_message(session); | |
1146 | break; | |
1147 | } | |
1148 | ||
1149 | /* if the message was enqueued, dont free it yet */ | |
1150 | if (message_enqueued == false) { | |
1151 | pcep_msg_free_message(msg); | |
1152 | } | |
1153 | } | |
1154 | dll_destroy(event->received_msg_list); | |
1155 | } |