]>
Commit | Line | Data |
---|---|---|
acddc0ed | 1 | // SPDX-License-Identifier: LGPL-2.1-or-later |
74971473 JG |
2 | /* |
3 | * This file is part of the PCEPlib, a PCEP protocol library. | |
4 | * | |
5 | * Copyright (C) 2020 Volta Networks https://voltanet.io/ | |
6 | * | |
74971473 JG |
7 | * Author : Brady Johnson <brady@voltanet.io> |
8 | * | |
9 | */ | |
10 | ||
1f8031f7 DL |
11 | #ifdef HAVE_CONFIG_H |
12 | #include "config.h" | |
13 | #endif | |
14 | ||
74971473 JG |
15 | #include <pthread.h> |
16 | #include <stdbool.h> | |
17 | #include <stdio.h> | |
18 | #include <string.h> | |
7ed8c4b1 | 19 | #include <assert.h> |
74971473 JG |
20 | |
21 | #include "pcep_msg_encoding.h" | |
22 | #include "pcep_session_logic.h" | |
23 | #include "pcep_session_logic_internals.h" | |
24 | #include "pcep_timers.h" | |
25 | #include "pcep_utils_logging.h" | |
26 | #include "pcep_utils_memory.h" | |
27 | ||
28 | #define TIMER_OPEN_KEEP_ALIVE_SECONDS 1 | |
29 | ||
30 | /* Session Logic Handle managed in pcep_session_logic.c */ | |
31 | extern pcep_event_queue *session_logic_event_queue_; | |
32 | void send_keep_alive(pcep_session *session); | |
33 | void send_pcep_error_with_object(pcep_session *session, | |
34 | enum pcep_error_type error_type, | |
35 | enum pcep_error_value error_value, | |
36 | struct pcep_object_header *object); | |
37 | void reset_dead_timer(pcep_session *session); | |
38 | bool verify_pcep_open_object(pcep_session *session, | |
39 | struct pcep_object_open *open_object); | |
40 | void send_reconciled_pcep_open(pcep_session *session, | |
41 | struct pcep_message *error_msg); | |
42 | bool handle_pcep_update(pcep_session *session, struct pcep_message *upd_msg); | |
43 | bool handle_pcep_initiate(pcep_session *session, struct pcep_message *init_msg); | |
44 | bool check_and_send_open_keep_alive(pcep_session *session); | |
45 | void log_pcc_pce_connection(pcep_session *session); | |
46 | bool handle_pcep_open(pcep_session *session, struct pcep_message *open_msg); | |
47 | ||
48 | /* | |
49 | * util functions called by the state handling below | |
50 | */ | |
51 | ||
52 | void send_keep_alive(pcep_session *session) | |
53 | { | |
54 | struct pcep_message *keep_alive_msg = pcep_msg_create_keepalive(); | |
55 | ||
56 | pcep_log( | |
57 | LOG_INFO, | |
58 | "%s: [%ld-%ld] pcep_session_logic send keep_alive message for session [%d]", | |
59 | __func__, time(NULL), pthread_self(), session->session_id); | |
60 | ||
61 | session_send_message(session, keep_alive_msg); | |
62 | ||
63 | /* The keep alive timer will be (re)set once the message | |
64 | * is sent in session_logic_message_sent_handler() */ | |
65 | } | |
66 | ||
67 | ||
68 | /* Send an error message with the corrected or offending object */ | |
69 | void send_pcep_error_with_object(pcep_session *session, | |
70 | enum pcep_error_type error_type, | |
71 | enum pcep_error_value error_value, | |
72 | struct pcep_object_header *object) | |
73 | { | |
74 | double_linked_list *obj_list = dll_initialize(); | |
75 | dll_append(obj_list, object); | |
76 | struct pcep_message *error_msg = pcep_msg_create_error_with_objects( | |
77 | error_type, error_value, obj_list); | |
78 | ||
79 | pcep_log( | |
80 | LOG_INFO, | |
81 | "%s: [%ld-%ld] pcep_session_logic send error message with object [%d][%d] for session [%d]", | |
82 | __func__, time(NULL), pthread_self(), error_type, error_value, | |
83 | session->session_id); | |
84 | ||
85 | session_send_message(session, error_msg); | |
86 | } | |
87 | ||
88 | ||
89 | void send_pcep_error(pcep_session *session, enum pcep_error_type error_type, | |
90 | enum pcep_error_value error_value) | |
91 | { | |
92 | struct pcep_message *error_msg = | |
93 | pcep_msg_create_error(error_type, error_value); | |
94 | ||
95 | pcep_log( | |
96 | LOG_INFO, | |
97 | "%s: [%ld-%ld] pcep_session_logic send error message [%d][%d] for session [%d]", | |
98 | __func__, time(NULL), pthread_self(), error_type, error_value, | |
99 | session->session_id); | |
100 | ||
101 | session_send_message(session, error_msg); | |
102 | } | |
103 | ||
104 | ||
105 | void reset_dead_timer(pcep_session *session) | |
106 | { | |
107 | /* Default to configured dead_timer if its not set yet or set to 0 by | |
108 | * the PCE */ | |
109 | int dead_timer_seconds = | |
110 | (session->pcc_config.dead_timer_pce_negotiated_seconds == 0) | |
111 | ? session->pcc_config.dead_timer_seconds | |
112 | : session->pcc_config.dead_timer_pce_negotiated_seconds; | |
113 | ||
114 | if (session->timer_id_dead_timer == TIMER_ID_NOT_SET) { | |
115 | session->timer_id_dead_timer = | |
116 | create_timer(dead_timer_seconds, session); | |
117 | pcep_log( | |
118 | LOG_INFO, | |
119 | "%s: [%ld-%ld] pcep_session_logic set dead timer [%d secs] id [%d] for session [%d]", | |
120 | __func__, time(NULL), pthread_self(), | |
121 | dead_timer_seconds, session->timer_id_dead_timer, | |
122 | session->session_id); | |
123 | } else { | |
124 | pcep_log( | |
125 | LOG_INFO, | |
126 | "%s: [%ld-%ld] pcep_session_logic reset dead timer [%d secs] id [%d] for session [%d]", | |
127 | __func__, time(NULL), pthread_self(), | |
128 | dead_timer_seconds, session->timer_id_dead_timer, | |
129 | session->session_id); | |
130 | reset_timer(session->timer_id_dead_timer); | |
131 | } | |
132 | } | |
133 | ||
134 | ||
135 | void enqueue_event(pcep_session *session, pcep_event_type event_type, | |
136 | struct pcep_message *message) | |
137 | { | |
138 | if (event_type == MESSAGE_RECEIVED && message == NULL) { | |
139 | pcep_log( | |
140 | LOG_WARNING, | |
141 | "%s: enqueue_event cannot enqueue a NULL message session [%d]", | |
142 | __func__, session->session_id); | |
143 | return; | |
144 | } | |
145 | ||
146 | pcep_event *event = pceplib_malloc(PCEPLIB_INFRA, sizeof(pcep_event)); | |
147 | memset(event, 0, sizeof(pcep_event)); | |
148 | ||
149 | event->session = session; | |
150 | event->event_type = event_type; | |
151 | event->event_time = time(NULL); | |
152 | event->message = message; | |
153 | ||
154 | pthread_mutex_lock(&session_logic_event_queue_->event_queue_mutex); | |
155 | if (session_logic_event_queue_->event_callback != NULL) { | |
156 | session_logic_event_queue_->event_callback( | |
157 | session_logic_event_queue_->event_callback_data, event); | |
158 | } else { | |
159 | queue_enqueue(session_logic_event_queue_->event_queue, event); | |
160 | } | |
161 | pthread_mutex_unlock(&session_logic_event_queue_->event_queue_mutex); | |
162 | } | |
163 | ||
164 | /* Verify the received PCEP Open object parameters are acceptable. If not, | |
165 | * update the unacceptable value(s) with an acceptable value so it can be sent | |
166 | * back to the sender. */ | |
167 | bool verify_pcep_open_object(pcep_session *session, | |
168 | struct pcep_object_open *open_object) | |
169 | { | |
170 | int retval = true; | |
171 | ||
172 | if (open_object->open_keepalive | |
173 | < session->pcc_config.min_keep_alive_seconds) { | |
174 | pcep_log( | |
175 | LOG_INFO, | |
176 | "%s: Rejecting unsupported Open Keep Alive value [%d] min [%d]", | |
177 | __func__, open_object->open_keepalive, | |
178 | session->pcc_config.min_keep_alive_seconds); | |
179 | open_object->open_keepalive = | |
180 | session->pcc_config.min_keep_alive_seconds; | |
181 | retval = false; | |
182 | } else if (open_object->open_keepalive | |
183 | > session->pcc_config.max_keep_alive_seconds) { | |
184 | pcep_log( | |
185 | LOG_INFO, | |
186 | "%s: Rejecting unsupported Open Keep Alive value [%d] max [%d]", | |
187 | __func__, open_object->open_keepalive, | |
188 | session->pcc_config.max_keep_alive_seconds); | |
189 | open_object->open_keepalive = | |
190 | session->pcc_config.max_keep_alive_seconds; | |
191 | retval = false; | |
192 | } | |
193 | ||
194 | if (open_object->open_deadtimer | |
195 | < session->pcc_config.min_dead_timer_seconds) { | |
196 | pcep_log(LOG_INFO, | |
197 | "%s: Rejecting unsupported Open Dead Timer value [%d]", | |
198 | __func__, open_object->open_deadtimer); | |
199 | open_object->open_deadtimer = | |
200 | session->pcc_config.min_dead_timer_seconds; | |
201 | retval = false; | |
202 | } else if (open_object->open_deadtimer | |
203 | > session->pcc_config.max_dead_timer_seconds) { | |
204 | pcep_log(LOG_INFO, | |
205 | "%s: Rejecting unsupported Open Dead Timer value [%d]", | |
206 | __func__, open_object->open_deadtimer); | |
207 | open_object->open_deadtimer = | |
208 | session->pcc_config.max_dead_timer_seconds; | |
209 | retval = false; | |
210 | } | |
211 | ||
212 | /* Check for Open Object TLVs */ | |
213 | if (pcep_object_has_tlvs((struct pcep_object_header *)open_object) | |
214 | == false) { | |
215 | /* There are no TLVs, all done */ | |
216 | return retval; | |
217 | } | |
218 | ||
219 | double_linked_list_node *tlv_node = open_object->header.tlv_list->head; | |
220 | while (tlv_node != NULL) { | |
221 | struct pcep_object_tlv_header *tlv = tlv_node->data; | |
222 | tlv_node = tlv_node->next_node; | |
223 | ||
224 | /* Supported Open Object TLVs */ | |
225 | switch (tlv->type) { | |
226 | case PCEP_OBJ_TLV_TYPE_LSP_DB_VERSION: | |
227 | case PCEP_OBJ_TLV_TYPE_PATH_SETUP_TYPE_CAPABILITY: | |
228 | case PCEP_OBJ_TLV_TYPE_SPEAKER_ENTITY_ID: | |
229 | case PCEP_OBJ_TLV_TYPE_STATEFUL_PCE_CAPABILITY: | |
230 | case PCEP_OBJ_TLV_TYPE_SR_PCE_CAPABILITY: | |
231 | break; | |
232 | ||
fdfa6ecf DS |
233 | case PCEP_OBJ_TLV_TYPE_NO_PATH_VECTOR: |
234 | case PCEP_OBJ_TLV_TYPE_OBJECTIVE_FUNCTION_LIST: | |
235 | case PCEP_OBJ_TLV_TYPE_VENDOR_INFO: | |
236 | case PCEP_OBJ_TLV_TYPE_SYMBOLIC_PATH_NAME: | |
237 | case PCEP_OBJ_TLV_TYPE_IPV4_LSP_IDENTIFIERS: | |
238 | case PCEP_OBJ_TLV_TYPE_IPV6_LSP_IDENTIFIERS: | |
239 | case PCEP_OBJ_TLV_TYPE_LSP_ERROR_CODE: | |
240 | case PCEP_OBJ_TLV_TYPE_RSVP_ERROR_SPEC: | |
241 | case PCEP_OBJ_TLV_TYPE_PATH_SETUP_TYPE: | |
242 | case PCEP_OBJ_TLV_TYPE_SRPOLICY_POL_ID: | |
243 | case PCEP_OBJ_TLV_TYPE_SRPOLICY_POL_NAME: | |
244 | case PCEP_OBJ_TLV_TYPE_SRPOLICY_CPATH_ID: | |
245 | case PCEP_OBJ_TLV_TYPE_SRPOLICY_CPATH_PREFERENCE: | |
246 | case PCEP_OBJ_TLV_TYPE_UNKNOWN: | |
247 | case PCEP_OBJ_TYPE_CISCO_BSID: | |
248 | case PCEP_OBJ_TLV_TYPE_ARBITRARY: | |
74971473 JG |
249 | /* TODO how to handle unrecognized TLV ?? */ |
250 | pcep_log( | |
251 | LOG_INFO, | |
252 | "%s: Unhandled OPEN Object TLV type: %d, length %d", | |
253 | __func__, tlv->type, tlv->encoded_tlv_length); | |
254 | break; | |
255 | } | |
256 | ||
257 | /* Verify the STATEFUL-PCE-CAPABILITY TLV */ | |
258 | if (tlv->type == PCEP_OBJ_TLV_TYPE_STATEFUL_PCE_CAPABILITY) { | |
259 | struct pcep_object_tlv_stateful_pce_capability | |
260 | *pce_cap_tlv = | |
261 | (struct | |
262 | pcep_object_tlv_stateful_pce_capability | |
263 | *)tlv; | |
264 | ||
265 | /* If the U flag is set, then the PCE is | |
266 | * capable of updating LSP parameters */ | |
267 | if (pce_cap_tlv->flag_u_lsp_update_capability) { | |
268 | if (session->pce_config | |
269 | .support_stateful_pce_lsp_update | |
270 | == false) { | |
271 | /* Turn off the U bit, as it is not | |
272 | * supported */ | |
273 | pcep_log( | |
274 | LOG_INFO, | |
275 | "%s: Rejecting unsupported Open STATEFUL-PCE-CAPABILITY TLV U flag", | |
276 | __func__); | |
277 | pce_cap_tlv | |
278 | ->flag_u_lsp_update_capability = | |
279 | false; | |
280 | retval = false; | |
281 | } else { | |
282 | session->stateful_pce = true; | |
283 | pcep_log( | |
284 | LOG_INFO, | |
285 | "%s: Setting PCEP session [%d] STATEFUL to support LSP updates", | |
286 | __func__, session->session_id); | |
287 | } | |
288 | } | |
289 | /* TODO the rest of the flags are not implemented yet */ | |
290 | else if (pce_cap_tlv->flag_s_include_db_version) { | |
291 | pcep_log( | |
292 | LOG_INFO, | |
293 | "%s: Ignoring Open STATEFUL-PCE-CAPABILITY TLV S Include DB Version flag", | |
294 | __func__); | |
295 | } else if ( | |
296 | pce_cap_tlv | |
297 | ->flag_i_lsp_instantiation_capability) { | |
298 | pcep_log( | |
299 | LOG_INFO, | |
300 | "%s: Ignoring Open STATEFUL-PCE-CAPABILITY TLV I LSP Instantiation Capability flag", | |
301 | __func__); | |
302 | } else if (pce_cap_tlv->flag_t_triggered_resync) { | |
303 | pcep_log( | |
304 | LOG_INFO, | |
305 | "%s: Ignoring Open STATEFUL-PCE-CAPABILITY TLV T Triggered Resync flag", | |
306 | __func__); | |
307 | } else if (pce_cap_tlv->flag_d_delta_lsp_sync) { | |
308 | pcep_log( | |
309 | LOG_INFO, | |
310 | "%s: Ignoring Open STATEFUL-PCE-CAPABILITY TLV D Delta LSP Sync flag", | |
311 | __func__); | |
312 | } else if (pce_cap_tlv->flag_f_triggered_initial_sync) { | |
313 | pcep_log( | |
314 | LOG_INFO, | |
315 | "%s: Ignoring Open STATEFUL-PCE-CAPABILITY TLV F Triggered Initial Sync flag", | |
316 | __func__); | |
317 | } | |
318 | } else if (tlv->type == PCEP_OBJ_TLV_TYPE_LSP_DB_VERSION) { | |
319 | if (session->pce_config.support_include_db_version | |
320 | == false) { | |
321 | pcep_log( | |
322 | LOG_INFO, | |
323 | "%s: Rejecting unsupported Open LSP DB VERSION TLV", | |
324 | __func__); | |
325 | /* Remove this TLV from the list */ | |
326 | dll_delete_node(open_object->header.tlv_list, | |
327 | tlv_node); | |
328 | retval = false; | |
329 | } | |
330 | } | |
331 | } | |
332 | ||
333 | return retval; | |
334 | } | |
335 | ||
336 | ||
337 | bool handle_pcep_open(pcep_session *session, struct pcep_message *open_msg) | |
338 | { | |
339 | /* Open Message validation and errors according to: | |
340 | * https://tools.ietf.org/html/rfc5440#section-7.15 */ | |
341 | ||
342 | if (session->session_state != SESSION_STATE_PCEP_CONNECTING | |
343 | && session->session_state != SESSION_STATE_INITIALIZED) { | |
344 | pcep_log( | |
345 | LOG_INFO, | |
346 | "%s: Received unexpected OPEN, current session state [%d, replying with error]", | |
347 | __func__, session->session_state); | |
348 | send_pcep_error(session, | |
349 | PCEP_ERRT_ATTEMPT_TO_ESTABLISH_2ND_PCEP_SESSION, | |
350 | PCEP_ERRV_RECVD_INVALID_OPEN_MSG); | |
351 | return false; | |
352 | } | |
353 | ||
354 | if (session->pce_open_received == true | |
355 | && session->pce_open_rejected == false) { | |
356 | pcep_log(LOG_INFO, | |
357 | "%s: Received duplicate OPEN, replying with error", | |
358 | __func__); | |
359 | send_pcep_error(session, | |
360 | PCEP_ERRT_ATTEMPT_TO_ESTABLISH_2ND_PCEP_SESSION, | |
361 | PCEP_ERRV_RECVD_INVALID_OPEN_MSG); | |
362 | return false; | |
363 | } | |
364 | ||
365 | struct pcep_object_open *open_object = | |
366 | (struct pcep_object_open *)pcep_obj_get(open_msg->obj_list, | |
367 | PCEP_OBJ_CLASS_OPEN); | |
368 | if (open_object == NULL) { | |
369 | pcep_log( | |
370 | LOG_INFO, | |
371 | "%s: Received OPEN message with no OPEN object, replying with error", | |
372 | __func__); | |
373 | send_pcep_error(session, PCEP_ERRT_SESSION_FAILURE, | |
374 | PCEP_ERRV_RECVD_INVALID_OPEN_MSG); | |
375 | return false; | |
376 | } | |
377 | ||
378 | /* Check for additional Open Msg objects */ | |
379 | if (open_msg->obj_list->num_entries > 1) { | |
380 | pcep_log( | |
381 | LOG_INFO, | |
382 | "%s: Found additional unsupported objects in the Open message, replying with error", | |
383 | __func__); | |
384 | send_pcep_error(session, PCEP_ERRT_SESSION_FAILURE, | |
385 | PCEP_ERRV_RECVD_INVALID_OPEN_MSG); | |
386 | return false; | |
387 | } | |
388 | ||
389 | session->pce_open_received = true; | |
390 | ||
391 | /* Verify the open object parameters and TLVs */ | |
392 | if (verify_pcep_open_object(session, open_object) == false) { | |
393 | enqueue_event(session, PCC_RCVD_INVALID_OPEN, NULL); | |
394 | if (session->pce_open_rejected) { | |
395 | /* The Open message was already rejected once, so | |
396 | * according to the spec, send an error message and | |
397 | * close the TCP connection. */ | |
398 | pcep_log( | |
399 | LOG_INFO, | |
400 | "%s: Received 2 consecutive unsupported Open messages, closing the connection.", | |
401 | __func__); | |
402 | send_pcep_error( | |
403 | session, PCEP_ERRT_SESSION_FAILURE, | |
404 | PCEP_ERRV_RECVD_SECOND_OPEN_MSG_UNACCEPTABLE); | |
405 | socket_comm_session_close_tcp_after_write( | |
406 | session->socket_comm_session); | |
407 | session->session_state = SESSION_STATE_INITIALIZED; | |
408 | enqueue_event(session, PCC_CONNECTION_FAILURE, NULL); | |
409 | } else { | |
410 | session->pce_open_rejected = true; | |
411 | /* Clone the object here, since the encapsulating | |
412 | * message will be deleted in handle_socket_comm_event() | |
413 | * most likely before this error message is sent */ | |
414 | struct pcep_object_open *cloned_open_object = | |
415 | pceplib_malloc(PCEPLIB_MESSAGES, | |
416 | sizeof(struct pcep_object_open)); | |
417 | memcpy(cloned_open_object, open_object, | |
418 | sizeof(struct pcep_object_open)); | |
419 | open_object->header.tlv_list = NULL; | |
420 | cloned_open_object->header.encoded_object = NULL; | |
421 | cloned_open_object->header.encoded_object_length = 0; | |
422 | send_pcep_error_with_object( | |
423 | session, PCEP_ERRT_SESSION_FAILURE, | |
424 | PCEP_ERRV_UNACCEPTABLE_OPEN_MSG_NEG, | |
425 | &cloned_open_object->header); | |
426 | } | |
427 | ||
428 | return false; | |
429 | } | |
430 | ||
431 | /* | |
432 | * Open Message accepted | |
433 | * Sending the keep-alive response will be managed the function caller | |
434 | */ | |
435 | ||
436 | session->timer_id_open_keep_alive = | |
437 | create_timer(TIMER_OPEN_KEEP_ALIVE_SECONDS, session); | |
438 | session->pcc_config.dead_timer_pce_negotiated_seconds = | |
439 | (int)open_object->open_deadtimer; | |
440 | /* Cancel the timer so we can change the dead_timer value */ | |
441 | cancel_timer(session->timer_id_dead_timer); | |
442 | session->timer_id_dead_timer = TIMER_ID_NOT_SET; | |
443 | reset_dead_timer(session); | |
444 | ||
445 | return true; | |
446 | } | |
447 | ||
448 | ||
449 | /* The original PCEP Open message sent to the PCE was rejected, | |
450 | * try to reconcile the differences and re-send a new Open. */ | |
451 | void send_reconciled_pcep_open(pcep_session *session, | |
452 | struct pcep_message *error_msg) | |
453 | { | |
454 | struct pcep_message *open_msg = create_pcep_open(session); | |
455 | ||
456 | struct pcep_object_open *error_open_obj = | |
457 | (struct pcep_object_open *)pcep_obj_get(error_msg->obj_list, | |
458 | PCEP_OBJ_CLASS_OPEN); | |
459 | if (error_open_obj == NULL) { | |
460 | /* Nothing to reconcile, send the same Open message again */ | |
461 | pcep_log( | |
462 | LOG_INFO, | |
463 | "%s: No Open object received in Error, sending the same Open message", | |
464 | __func__); | |
465 | session_send_message(session, open_msg); | |
466 | return; | |
467 | } | |
468 | ||
469 | struct pcep_object_open *open_obj = | |
470 | (struct pcep_object_open *)pcep_obj_get(open_msg->obj_list, | |
471 | PCEP_OBJ_CLASS_OPEN); | |
7ed8c4b1 JG |
472 | // open_msg can not have empty obj_list |
473 | assert(open_obj != NULL); | |
74971473 JG |
474 | |
475 | if (error_open_obj->open_deadtimer | |
476 | != session->pce_config.dead_timer_seconds) { | |
477 | if (error_open_obj->open_deadtimer | |
478 | >= session->pce_config.min_dead_timer_seconds | |
479 | && error_open_obj->open_deadtimer | |
480 | <= session->pce_config.max_dead_timer_seconds) { | |
481 | open_obj->open_deadtimer = | |
482 | error_open_obj->open_deadtimer; | |
483 | session->pcc_config.dead_timer_pce_negotiated_seconds = | |
484 | error_open_obj->open_deadtimer; | |
485 | pcep_log( | |
486 | LOG_INFO, | |
487 | "%s: Open deadtimer value [%d] rejected, using PCE value [%d]", | |
488 | __func__, | |
489 | session->pcc_config.dead_timer_seconds, | |
490 | session->pcc_config | |
491 | .dead_timer_pce_negotiated_seconds); | |
492 | /* Reset the timer with the new value */ | |
493 | cancel_timer(session->timer_id_dead_timer); | |
494 | session->timer_id_dead_timer = TIMER_ID_NOT_SET; | |
495 | reset_dead_timer(session); | |
496 | } else { | |
497 | pcep_log( | |
498 | LOG_INFO, | |
499 | "%s: Can not reconcile Open with suggested deadtimer [%d]", | |
500 | __func__, error_open_obj->open_deadtimer); | |
501 | } | |
502 | } | |
503 | ||
504 | if (error_open_obj->open_keepalive | |
505 | != session->pce_config.keep_alive_seconds) { | |
506 | if (error_open_obj->open_keepalive | |
507 | >= session->pce_config.min_keep_alive_seconds | |
508 | && error_open_obj->open_keepalive | |
509 | <= session->pce_config.max_keep_alive_seconds) { | |
510 | open_obj->open_keepalive = | |
511 | error_open_obj->open_keepalive; | |
512 | session->pcc_config | |
513 | .keep_alive_pce_negotiated_timer_seconds = | |
514 | error_open_obj->open_keepalive; | |
515 | pcep_log( | |
516 | LOG_INFO, | |
517 | "%s: Open keep alive value [%d] rejected, using PCE value [%d]", | |
518 | __func__, | |
519 | session->pcc_config.keep_alive_seconds, | |
520 | session->pcc_config | |
521 | .keep_alive_pce_negotiated_timer_seconds); | |
522 | /* Cancel the timer, the timer will be set again with | |
523 | * the new value when this open message is sent */ | |
524 | cancel_timer(session->timer_id_keep_alive); | |
525 | session->timer_id_keep_alive = TIMER_ID_NOT_SET; | |
526 | } else { | |
527 | pcep_log( | |
528 | LOG_INFO, | |
529 | "%s: Can not reconcile Open with suggested keepalive [%d]", | |
530 | __func__, error_open_obj->open_keepalive); | |
531 | } | |
532 | } | |
533 | ||
534 | /* TODO reconcile the TLVs */ | |
535 | ||
536 | session_send_message(session, open_msg); | |
537 | reset_timer(session->timer_id_open_keep_alive); | |
538 | } | |
539 | ||
540 | ||
541 | bool handle_pcep_update(pcep_session *session, struct pcep_message *upd_msg) | |
542 | { | |
543 | /* Update Message validation and errors according to: | |
544 | * https://tools.ietf.org/html/rfc8231#section-6.2 */ | |
545 | ||
546 | if (upd_msg->obj_list == NULL) { | |
547 | pcep_log(LOG_INFO, | |
548 | "%s: Invalid PcUpd message: Message has no objects", | |
549 | __func__); | |
550 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
551 | PCEP_ERRV_SRP_OBJECT_MISSING); | |
552 | return false; | |
553 | } | |
554 | ||
555 | /* Verify the mandatory objects are present */ | |
556 | struct pcep_object_header *obj = | |
557 | pcep_obj_get(upd_msg->obj_list, PCEP_OBJ_CLASS_SRP); | |
558 | if (obj == NULL) { | |
559 | pcep_log(LOG_INFO, | |
560 | "%s: Invalid PcUpd message: Missing SRP object", | |
561 | __func__); | |
562 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
563 | PCEP_ERRV_SRP_OBJECT_MISSING); | |
564 | return false; | |
565 | } | |
566 | ||
567 | obj = pcep_obj_get(upd_msg->obj_list, PCEP_OBJ_CLASS_LSP); | |
568 | if (obj == NULL) { | |
569 | pcep_log(LOG_INFO, | |
570 | "%s: Invalid PcUpd message: Missing LSP object", | |
571 | __func__); | |
572 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
573 | PCEP_ERRV_LSP_OBJECT_MISSING); | |
574 | return false; | |
575 | } | |
576 | ||
577 | obj = pcep_obj_get(upd_msg->obj_list, PCEP_OBJ_CLASS_ERO); | |
578 | if (obj == NULL) { | |
579 | pcep_log(LOG_INFO, | |
580 | "%s: Invalid PcUpd message: Missing ERO object", | |
581 | __func__); | |
582 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
583 | PCEP_ERRV_ERO_OBJECT_MISSING); | |
584 | return false; | |
585 | } | |
586 | ||
587 | /* Verify the objects are are in the correct order */ | |
588 | double_linked_list_node *node = upd_msg->obj_list->head; | |
589 | struct pcep_object_srp *srp_object = | |
590 | (struct pcep_object_srp *)node->data; | |
591 | if (srp_object->header.object_class != PCEP_OBJ_CLASS_SRP) { | |
592 | pcep_log( | |
593 | LOG_INFO, | |
594 | "%s: Invalid PcUpd message: First object must be an SRP, found [%d]", | |
595 | __func__, srp_object->header.object_class); | |
596 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
597 | PCEP_ERRV_SRP_OBJECT_MISSING); | |
598 | return false; | |
599 | } | |
600 | ||
601 | node = node->next_node; | |
602 | struct pcep_object_lsp *lsp_object = | |
603 | (struct pcep_object_lsp *)node->data; | |
604 | if (lsp_object->header.object_class != PCEP_OBJ_CLASS_LSP) { | |
605 | pcep_log( | |
606 | LOG_INFO, | |
607 | "%s: Invalid PcUpd message: Second object must be an LSP, found [%d]", | |
608 | __func__, lsp_object->header.object_class); | |
609 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
610 | PCEP_ERRV_LSP_OBJECT_MISSING); | |
611 | return false; | |
612 | } | |
613 | ||
614 | node = node->next_node; | |
615 | struct pcep_object_ro *ero_object = node->data; | |
616 | if (ero_object->header.object_class != PCEP_OBJ_CLASS_ERO) { | |
617 | pcep_log( | |
618 | LOG_INFO, | |
619 | "%s: Invalid PcUpd message: Third object must be an ERO, found [%d]", | |
620 | __func__, ero_object->header.object_class); | |
621 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
622 | PCEP_ERRV_ERO_OBJECT_MISSING); | |
623 | return false; | |
624 | } | |
625 | ||
626 | return true; | |
627 | } | |
628 | ||
629 | bool handle_pcep_initiate(pcep_session *session, struct pcep_message *init_msg) | |
630 | { | |
631 | /* Instantiate Message validation and errors according to: | |
632 | * https://tools.ietf.org/html/rfc8281#section-5 */ | |
633 | ||
634 | if (init_msg->obj_list == NULL) { | |
635 | pcep_log( | |
636 | LOG_INFO, | |
637 | "%s: Invalid PcInitiate message: Message has no objects", | |
638 | __func__); | |
639 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
640 | PCEP_ERRV_SRP_OBJECT_MISSING); | |
641 | return false; | |
642 | } | |
643 | ||
644 | /* Verify the mandatory objects are present */ | |
645 | struct pcep_object_header *obj = | |
646 | pcep_obj_get(init_msg->obj_list, PCEP_OBJ_CLASS_SRP); | |
647 | if (obj == NULL) { | |
648 | pcep_log(LOG_INFO, | |
649 | "%s: Invalid PcInitiate message: Missing SRP object", | |
650 | __func__); | |
651 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
652 | PCEP_ERRV_SRP_OBJECT_MISSING); | |
653 | return false; | |
654 | } | |
655 | ||
656 | obj = pcep_obj_get(init_msg->obj_list, PCEP_OBJ_CLASS_LSP); | |
657 | if (obj == NULL) { | |
658 | pcep_log(LOG_INFO, | |
659 | "%s: Invalid PcInitiate message: Missing LSP object", | |
660 | __func__); | |
661 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
662 | PCEP_ERRV_LSP_OBJECT_MISSING); | |
663 | return false; | |
664 | } | |
665 | ||
666 | /* Verify the objects are are in the correct order */ | |
667 | double_linked_list_node *node = init_msg->obj_list->head; | |
668 | struct pcep_object_srp *srp_object = | |
669 | (struct pcep_object_srp *)node->data; | |
670 | if (srp_object->header.object_class != PCEP_OBJ_CLASS_SRP) { | |
671 | pcep_log( | |
672 | LOG_INFO, | |
673 | "%s: Invalid PcInitiate message: First object must be an SRP, found [%d]", | |
674 | __func__, srp_object->header.object_class); | |
675 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
676 | PCEP_ERRV_SRP_OBJECT_MISSING); | |
677 | return false; | |
678 | } | |
679 | ||
680 | node = node->next_node; | |
681 | struct pcep_object_lsp *lsp_object = | |
682 | (struct pcep_object_lsp *)node->data; | |
683 | if (lsp_object->header.object_class != PCEP_OBJ_CLASS_LSP) { | |
684 | pcep_log( | |
685 | LOG_INFO, | |
686 | "%s: Invalid PcInitiate message: Second object must be an LSP, found [%d]", | |
687 | __func__, lsp_object->header.object_class); | |
688 | send_pcep_error(session, PCEP_ERRT_MANDATORY_OBJECT_MISSING, | |
689 | PCEP_ERRV_LSP_OBJECT_MISSING); | |
690 | return false; | |
691 | } | |
692 | ||
693 | /* There may be more optional objects */ | |
694 | return true; | |
695 | } | |
696 | ||
697 | void increment_unknown_message(pcep_session *session) | |
698 | { | |
699 | /* https://tools.ietf.org/html/rfc5440#section-6.9 | |
700 | * If a PCC/PCE receives unrecognized messages at a rate equal or | |
701 | * greater than MAX-UNKNOWN-MESSAGES unknown message requests per | |
702 | * minute, the PCC/PCE MUST send a PCEP CLOSE message */ | |
703 | ||
704 | time_t *unknown_message_time = | |
705 | pceplib_malloc(PCEPLIB_INFRA, sizeof(time_t)); | |
706 | *unknown_message_time = time(NULL); | |
707 | time_t expire_time = *unknown_message_time + 60; | |
708 | queue_enqueue(session->num_unknown_messages_time_queue, | |
709 | unknown_message_time); | |
710 | ||
711 | /* Purge any entries older than 1 minute. The oldest entries are at the | |
712 | * queue head */ | |
713 | queue_node *time_node = session->num_unknown_messages_time_queue->head; | |
714 | while (time_node != NULL) { | |
715 | if (*((time_t *)time_node->data) > expire_time) { | |
716 | pceplib_free( | |
717 | PCEPLIB_INFRA, | |
718 | queue_dequeue( | |
719 | session->num_unknown_messages_time_queue)); | |
720 | time_node = | |
721 | session->num_unknown_messages_time_queue->head; | |
722 | } else { | |
723 | time_node = NULL; | |
724 | } | |
725 | } | |
726 | ||
727 | if ((int)session->num_unknown_messages_time_queue->num_entries | |
728 | >= session->pcc_config.max_unknown_messages) { | |
729 | pcep_log( | |
730 | LOG_INFO, | |
731 | "%s: [%ld-%ld] Max unknown messages reached [%d] closing session [%d]", | |
732 | __func__, time(NULL), pthread_self(), | |
733 | session->pcc_config.max_unknown_messages, | |
734 | session->session_id); | |
735 | ||
736 | close_pcep_session_with_reason(session, | |
737 | PCEP_CLOSE_REASON_UNREC_MSG); | |
738 | enqueue_event(session, PCC_RCVD_MAX_UNKOWN_MSGS, NULL); | |
739 | } | |
740 | } | |
741 | ||
742 | bool check_and_send_open_keep_alive(pcep_session *session) | |
743 | { | |
744 | if (session->pce_open_received == true | |
745 | && session->pce_open_rejected == false | |
746 | && session->pce_open_keep_alive_sent == false) { | |
747 | /* Send the PCE Open keep-alive response if it hasnt been sent | |
748 | * yet */ | |
749 | cancel_timer(session->timer_id_open_keep_alive); | |
750 | session->timer_id_open_keep_alive = TIMER_ID_NOT_SET; | |
751 | send_keep_alive(session); | |
752 | session->pce_open_keep_alive_sent = true; | |
753 | ||
754 | return true; | |
755 | } | |
756 | ||
757 | return false; | |
758 | } | |
759 | ||
760 | void log_pcc_pce_connection(pcep_session *session) | |
761 | { | |
762 | if (session->socket_comm_session == NULL) { | |
763 | /* This only happens in UT */ | |
764 | return; | |
765 | } | |
766 | ||
767 | char src_ip_buf[40] = {0}, dst_ip_buf[40] = {0}; | |
768 | uint16_t src_port, dst_port; | |
769 | ||
770 | if (session->socket_comm_session->is_ipv6) { | |
771 | inet_ntop(AF_INET6, | |
772 | &session->socket_comm_session->src_sock_addr | |
773 | .src_sock_addr_ipv6.sin6_addr, | |
774 | src_ip_buf, sizeof(src_ip_buf)); | |
775 | inet_ntop(AF_INET6, | |
776 | &session->socket_comm_session->dest_sock_addr | |
777 | .dest_sock_addr_ipv6.sin6_addr, | |
778 | dst_ip_buf, sizeof(dst_ip_buf)); | |
779 | src_port = htons(session->socket_comm_session->src_sock_addr | |
780 | .src_sock_addr_ipv6.sin6_port); | |
781 | dst_port = htons(session->socket_comm_session->dest_sock_addr | |
782 | .dest_sock_addr_ipv6.sin6_port); | |
783 | } else { | |
784 | inet_ntop(AF_INET, | |
785 | &session->socket_comm_session->src_sock_addr | |
786 | .src_sock_addr_ipv4.sin_addr, | |
787 | src_ip_buf, sizeof(src_ip_buf)); | |
788 | inet_ntop(AF_INET, | |
789 | &session->socket_comm_session->dest_sock_addr | |
790 | .dest_sock_addr_ipv4.sin_addr, | |
791 | dst_ip_buf, sizeof(dst_ip_buf)); | |
792 | src_port = htons(session->socket_comm_session->src_sock_addr | |
793 | .src_sock_addr_ipv4.sin_port); | |
794 | dst_port = htons(session->socket_comm_session->dest_sock_addr | |
795 | .dest_sock_addr_ipv4.sin_port); | |
796 | } | |
797 | ||
798 | pcep_log( | |
799 | LOG_INFO, | |
800 | "%s: [%ld-%ld] Successful PCC [%s:%d] connection to PCE [%s:%d] session [%d] fd [%d]", | |
801 | __func__, time(NULL), pthread_self(), src_ip_buf, src_port, | |
802 | dst_ip_buf, dst_port, session->session_id, | |
803 | session->socket_comm_session->socket_fd); | |
804 | } | |
805 | ||
806 | /* | |
807 | * these functions are called by session_logic_loop() from | |
808 | * pcep_session_logic_loop.c these functions are executed in the | |
809 | * session_logic_loop thread, and the mutex is locked before calling these | |
810 | * functions, so they are thread safe. | |
811 | */ | |
812 | ||
813 | /* state machine handling for expired timers */ | |
814 | void handle_timer_event(pcep_session_event *event) | |
815 | { | |
816 | if (event == NULL) { | |
817 | pcep_log(LOG_INFO, "%s: handle_timer_event NULL event", | |
818 | __func__); | |
819 | return; | |
820 | } | |
821 | ||
822 | pcep_session *session = event->session; | |
823 | ||
824 | pcep_log( | |
825 | LOG_INFO, | |
d85bf6f1 | 826 | "%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 |
827 | __func__, time(NULL), pthread_self(), session->session_id, |
828 | event->expired_timer_id, session->timer_id_open_keep_wait, | |
829 | session->timer_id_open_keep_alive, session->timer_id_dead_timer, | |
830 | session->timer_id_keep_alive); | |
831 | ||
832 | /* | |
833 | * these timer expirations are independent of the session state | |
834 | */ | |
835 | if (event->expired_timer_id == session->timer_id_dead_timer) { | |
836 | session->timer_id_dead_timer = TIMER_ID_NOT_SET; | |
837 | increment_event_counters(session, | |
838 | PCEP_EVENT_COUNTER_ID_TIMER_DEADTIMER); | |
839 | close_pcep_session_with_reason(session, | |
840 | PCEP_CLOSE_REASON_DEADTIMER); | |
841 | enqueue_event(session, PCE_DEAD_TIMER_EXPIRED, NULL); | |
842 | return; | |
843 | } else if (event->expired_timer_id == session->timer_id_keep_alive) { | |
844 | session->timer_id_keep_alive = TIMER_ID_NOT_SET; | |
845 | increment_event_counters(session, | |
846 | PCEP_EVENT_COUNTER_ID_TIMER_KEEPALIVE); | |
847 | send_keep_alive(session); | |
848 | return; | |
849 | } | |
850 | ||
851 | /* | |
852 | * handle timers that depend on the session state | |
853 | */ | |
854 | switch (session->session_state) { | |
855 | case SESSION_STATE_PCEP_CONNECTING: | |
856 | if (event->expired_timer_id | |
857 | == session->timer_id_open_keep_wait) { | |
858 | /* close the TCP session */ | |
859 | pcep_log( | |
860 | LOG_INFO, | |
861 | "%s: handle_timer_event open_keep_wait timer expired for session [%d]", | |
862 | __func__, session->session_id); | |
863 | increment_event_counters( | |
864 | session, | |
865 | PCEP_EVENT_COUNTER_ID_TIMER_OPENKEEPWAIT); | |
866 | socket_comm_session_close_tcp_after_write( | |
867 | session->socket_comm_session); | |
868 | session->session_state = SESSION_STATE_INITIALIZED; | |
869 | session->timer_id_open_keep_wait = TIMER_ID_NOT_SET; | |
870 | enqueue_event(session, PCE_OPEN_KEEP_WAIT_TIMER_EXPIRED, | |
871 | NULL); | |
872 | } | |
873 | ||
874 | if (event->expired_timer_id | |
875 | == session->timer_id_open_keep_alive) { | |
876 | increment_event_counters( | |
877 | session, | |
878 | PCEP_EVENT_COUNTER_ID_TIMER_OPENKEEPALIVE); | |
879 | session->timer_id_open_keep_alive = TIMER_ID_NOT_SET; | |
880 | if (check_and_send_open_keep_alive(session) == true) { | |
881 | if (session->pcc_open_accepted == true | |
882 | && session->session_state | |
883 | != SESSION_STATE_PCEP_CONNECTED) { | |
884 | log_pcc_pce_connection(session); | |
885 | session->session_state = | |
886 | SESSION_STATE_PCEP_CONNECTED; | |
887 | increment_event_counters( | |
888 | session, | |
889 | PCEP_EVENT_COUNTER_ID_PCE_CONNECT); | |
890 | enqueue_event(session, | |
891 | PCC_CONNECTED_TO_PCE, | |
892 | NULL); | |
893 | } | |
894 | } | |
895 | return; | |
896 | } | |
897 | break; | |
898 | ||
899 | case SESSION_STATE_INITIALIZED: | |
900 | case SESSION_STATE_PCEP_CONNECTED: | |
fdfa6ecf | 901 | case SESSION_STATE_UNKNOWN: |
74971473 JG |
902 | pcep_log( |
903 | LOG_INFO, | |
904 | "%s: handle_timer_event unrecognized state transition, timer_id [%d] state [%d] session [%d]", | |
905 | __func__, event->expired_timer_id, | |
906 | session->session_state, session->session_id); | |
907 | break; | |
908 | } | |
909 | } | |
910 | ||
911 | /* State machine handling for received messages. | |
912 | * This event was created in session_logic_msg_ready_handler() in | |
913 | * pcep_session_logic_loop.c */ | |
914 | void handle_socket_comm_event(pcep_session_event *event) | |
915 | { | |
916 | if (event == NULL) { | |
917 | pcep_log(LOG_INFO, "%s: handle_socket_comm_event NULL event", | |
918 | __func__); | |
919 | return; | |
920 | } | |
921 | ||
922 | pcep_session *session = event->session; | |
923 | ||
924 | pcep_log( | |
925 | LOG_INFO, | |
926 | "%s: [%ld-%ld] pcep_session_logic handle_socket_comm_event: session [%d] num messages [%d] socket_closed [%d]", | |
927 | __func__, time(NULL), pthread_self(), session->session_id, | |
928 | (event->received_msg_list == NULL | |
929 | ? -1 | |
930 | : (int)event->received_msg_list->num_entries), | |
931 | event->socket_closed); | |
932 | ||
933 | /* | |
934 | * independent of the session state | |
935 | */ | |
936 | if (event->socket_closed) { | |
937 | pcep_log( | |
938 | LOG_INFO, | |
939 | "%s: handle_socket_comm_event socket closed for session [%d]", | |
940 | __func__, session->session_id); | |
941 | socket_comm_session_close_tcp(session->socket_comm_session); | |
942 | enqueue_event(session, PCE_CLOSED_SOCKET, NULL); | |
943 | if (session->session_state == SESSION_STATE_PCEP_CONNECTING) { | |
944 | enqueue_event(session, PCC_CONNECTION_FAILURE, NULL); | |
945 | } | |
946 | session->session_state = SESSION_STATE_INITIALIZED; | |
947 | increment_event_counters(session, | |
948 | PCEP_EVENT_COUNTER_ID_PCE_DISCONNECT); | |
949 | return; | |
950 | } | |
951 | ||
952 | reset_dead_timer(session); | |
953 | ||
954 | if (event->received_msg_list == NULL) { | |
955 | return; | |
956 | } | |
957 | ||
958 | /* Message received on socket */ | |
959 | double_linked_list_node *msg_node; | |
960 | for (msg_node = event->received_msg_list->head; msg_node != NULL; | |
961 | msg_node = msg_node->next_node) { | |
962 | bool message_enqueued = false; | |
963 | struct pcep_message *msg = | |
964 | (struct pcep_message *)msg_node->data; | |
965 | pcep_log(LOG_INFO, "%s: \t %s message", __func__, | |
966 | get_message_type_str(msg->msg_header->type)); | |
967 | ||
968 | increment_message_rx_counters(session, msg); | |
969 | ||
970 | switch (msg->msg_header->type) { | |
971 | case PCEP_TYPE_OPEN: | |
972 | /* handle_pcep_open() checks session state, and for | |
973 | * duplicate erroneous open messages, and replies with | |
974 | * error messages as needed. It also sets | |
975 | * pce_open_received. */ | |
976 | if (handle_pcep_open(session, msg) == true) { | |
977 | /* PCE Open Message Accepted */ | |
978 | enqueue_event(session, MESSAGE_RECEIVED, msg); | |
979 | message_enqueued = true; | |
980 | session->pce_open_accepted = true; | |
981 | session->pce_open_rejected = false; | |
982 | if (session->pcc_open_accepted) { | |
983 | /* If both the PCC and PCE Opens are | |
984 | * accepted, then the session is | |
985 | * connected */ | |
986 | ||
987 | check_and_send_open_keep_alive(session); | |
988 | log_pcc_pce_connection(session); | |
989 | session->session_state = | |
990 | SESSION_STATE_PCEP_CONNECTED; | |
991 | increment_event_counters( | |
992 | session, | |
993 | PCEP_EVENT_COUNTER_ID_PCE_CONNECT); | |
994 | enqueue_event(session, | |
995 | PCC_CONNECTED_TO_PCE, | |
996 | NULL); | |
997 | } | |
998 | } | |
999 | break; | |
1000 | ||
1001 | case PCEP_TYPE_KEEPALIVE: | |
1002 | if (session->session_state | |
1003 | == SESSION_STATE_PCEP_CONNECTING) { | |
1004 | /* PCC Open Message Accepted */ | |
1005 | cancel_timer(session->timer_id_open_keep_wait); | |
1006 | session->timer_id_open_keep_wait = | |
1007 | TIMER_ID_NOT_SET; | |
1008 | session->pcc_open_accepted = true; | |
1009 | session->pcc_open_rejected = false; | |
1010 | check_and_send_open_keep_alive(session); | |
1011 | ||
1012 | if (session->pce_open_accepted) { | |
1013 | /* If both the PCC and PCE Opens are | |
1014 | * accepted, then the session is | |
1015 | * connected */ | |
1016 | log_pcc_pce_connection(session); | |
1017 | session->session_state = | |
1018 | SESSION_STATE_PCEP_CONNECTED; | |
1019 | increment_event_counters( | |
1020 | session, | |
1021 | PCEP_EVENT_COUNTER_ID_PCC_CONNECT); | |
1022 | enqueue_event(session, | |
1023 | PCC_CONNECTED_TO_PCE, | |
1024 | NULL); | |
1025 | } | |
1026 | } | |
1027 | /* The dead_timer was already reset above, so nothing | |
1028 | * extra to do here */ | |
1029 | break; | |
1030 | ||
1031 | case PCEP_TYPE_PCREP: | |
1032 | enqueue_event(session, MESSAGE_RECEIVED, msg); | |
1033 | message_enqueued = true; | |
1034 | break; | |
1035 | ||
1036 | case PCEP_TYPE_CLOSE: | |
1037 | session->session_state = SESSION_STATE_INITIALIZED; | |
1038 | socket_comm_session_close_tcp( | |
1039 | session->socket_comm_session); | |
1040 | /* TODO should we also enqueue the message, so they can | |
1041 | * see the reasons?? */ | |
1042 | enqueue_event(session, PCE_SENT_PCEP_CLOSE, NULL); | |
1043 | /* TODO could this duplicate the disconnect counter with | |
1044 | * socket close ?? */ | |
1045 | increment_event_counters( | |
1046 | session, PCEP_EVENT_COUNTER_ID_PCE_DISCONNECT); | |
1047 | break; | |
1048 | ||
1049 | case PCEP_TYPE_PCREQ: | |
1050 | /* The PCC does not support receiving PcReq messages */ | |
1051 | send_pcep_error(session, | |
1052 | PCEP_ERRT_CAPABILITY_NOT_SUPPORTED, | |
1053 | PCEP_ERRV_UNASSIGNED); | |
1054 | break; | |
1055 | ||
1056 | case PCEP_TYPE_REPORT: | |
1057 | /* The PCC does not support receiving Report messages */ | |
1058 | send_pcep_error(session, | |
1059 | PCEP_ERRT_CAPABILITY_NOT_SUPPORTED, | |
1060 | PCEP_ERRV_UNASSIGNED); | |
1061 | break; | |
1062 | ||
1063 | case PCEP_TYPE_UPDATE: | |
1064 | /* Should reply with a PcRpt */ | |
1065 | if (handle_pcep_update(session, msg) == true) { | |
1066 | enqueue_event(session, MESSAGE_RECEIVED, msg); | |
1067 | message_enqueued = true; | |
1068 | } | |
1069 | break; | |
1070 | ||
1071 | case PCEP_TYPE_INITIATE: | |
1072 | /* Should reply with a PcRpt */ | |
1073 | if (handle_pcep_initiate(session, msg) == true) { | |
1074 | enqueue_event(session, MESSAGE_RECEIVED, msg); | |
1075 | message_enqueued = true; | |
1076 | } | |
1077 | break; | |
1078 | ||
1079 | case PCEP_TYPE_PCNOTF: | |
1080 | enqueue_event(session, MESSAGE_RECEIVED, msg); | |
1081 | message_enqueued = true; | |
1082 | break; | |
1083 | ||
1084 | case PCEP_TYPE_ERROR: | |
1085 | if (msg->obj_list != NULL | |
1086 | && msg->obj_list->num_entries > 0) { | |
1087 | struct pcep_object_header *obj_hdr = | |
1088 | pcep_obj_get(msg->obj_list, | |
1089 | PCEP_OBJ_CLASS_ERROR); | |
1090 | if (obj_hdr != NULL) { | |
1091 | struct pcep_object_error *error_obj = | |
1092 | (struct pcep_object_error *) | |
1093 | obj_hdr; | |
1094 | pcep_log( | |
1095 | LOG_DEBUG, | |
1096 | "%s: Error object [type, value] = [%s, %s]", | |
1097 | __func__, | |
1098 | get_error_type_str( | |
1099 | error_obj->error_type), | |
1100 | get_error_value_str( | |
1101 | error_obj->error_type, | |
1102 | error_obj | |
1103 | ->error_value)); | |
1104 | } | |
1105 | } | |
1106 | ||
1107 | if (session->session_state | |
1108 | == SESSION_STATE_PCEP_CONNECTING) { | |
1109 | /* A PCC_CONNECTION_FAILURE event will be sent | |
1110 | * when the socket is closed, if the state is | |
1111 | * SESSION_STATE_PCEP_CONNECTING, in case the | |
1112 | * PCE allows more than 2 failed open messages. | |
1113 | */ | |
1114 | pcep_log(LOG_INFO, | |
1115 | "%s: PCC Open message rejected by PCE", | |
1116 | __func__); | |
1117 | session->pcc_open_rejected = true; | |
1118 | send_reconciled_pcep_open(session, msg); | |
1119 | enqueue_event(session, PCC_SENT_INVALID_OPEN, | |
1120 | NULL); | |
1121 | } | |
1122 | enqueue_event(session, MESSAGE_RECEIVED, msg); | |
1123 | message_enqueued = true; | |
1124 | break; | |
1125 | ||
fdfa6ecf DS |
1126 | case PCEP_TYPE_START_TLS: |
1127 | case PCEP_TYPE_MAX: | |
74971473 JG |
1128 | pcep_log(LOG_INFO, "%s: \t UnSupported message", |
1129 | __func__); | |
1130 | send_pcep_error(session, | |
1131 | PCEP_ERRT_CAPABILITY_NOT_SUPPORTED, | |
1132 | PCEP_ERRV_UNASSIGNED); | |
1133 | increment_unknown_message(session); | |
1134 | break; | |
1135 | } | |
1136 | ||
1137 | /* if the message was enqueued, dont free it yet */ | |
1138 | if (message_enqueued == false) { | |
1139 | pcep_msg_free_message(msg); | |
1140 | } | |
1141 | } | |
1142 | dll_destroy(event->received_msg_list); | |
1143 | } |