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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 | ||
11 | ||
12 | /* | |
13 | * Public PCEPlib PCC API implementation | |
14 | */ | |
15 | ||
16 | #include <zebra.h> | |
17 | ||
18 | #include <pthread.h> | |
19 | #include <stdbool.h> | |
20 | #include <stdio.h> | |
21 | #include <string.h> | |
22 | ||
23 | #include "pcep_msg_messages.h" | |
24 | #include "pcep_pcc_api.h" | |
25 | #include "pcep_utils_counters.h" | |
26 | #include "pcep_utils_logging.h" | |
27 | ||
28 | /* Not using an array here since the enum pcep_event_type indeces go into the | |
29 | * 100's */ | |
30 | const char MESSAGE_RECEIVED_STR[] = "MESSAGE_RECEIVED"; | |
31 | const char PCE_CLOSED_SOCKET_STR[] = "PCE_CLOSED_SOCKET"; | |
32 | const char PCE_SENT_PCEP_CLOSE_STR[] = "PCE_SENT_PCEP_CLOSE"; | |
33 | const char PCE_DEAD_TIMER_EXPIRED_STR[] = "PCE_DEAD_TIMER_EXPIRED"; | |
34 | const char PCE_OPEN_KEEP_WAIT_TIMER_EXPIRED_STR[] = | |
35 | "PCE_OPEN_KEEP_WAIT_TIMER_EXPIRED"; | |
36 | const char PCC_CONNECTED_TO_PCE_STR[] = "PCC_CONNECTED_TO_PCE"; | |
37 | const char PCC_PCEP_SESSION_CLOSED_STR[] = "PCC_PCEP_SESSION_CLOSED"; | |
38 | const char PCC_RCVD_INVALID_OPEN_STR[] = "PCC_RCVD_INVALID_OPEN"; | |
39 | const char PCC_RCVD_MAX_INVALID_MSGS_STR[] = "PCC_RCVD_MAX_INVALID_MSGS"; | |
40 | const char PCC_RCVD_MAX_UNKOWN_MSGS_STR[] = "PCC_RCVD_MAX_UNKOWN_MSGS"; | |
41 | const char UNKNOWN_EVENT_STR[] = "UNKNOWN Event Type"; | |
42 | ||
43 | /* Session Logic Handle managed in pcep_session_logic.c */ | |
44 | extern pcep_event_queue *session_logic_event_queue_; | |
45 | ||
2816045a | 46 | bool initialize_pcc(void) |
74971473 JG |
47 | { |
48 | if (!run_session_logic()) { | |
49 | pcep_log(LOG_ERR, "%s: Error initializing PCC session logic.", | |
50 | __func__); | |
51 | return false; | |
52 | } | |
53 | ||
54 | return true; | |
55 | } | |
56 | ||
57 | ||
58 | bool initialize_pcc_infra(struct pceplib_infra_config *infra_config) | |
59 | { | |
60 | if (infra_config == NULL) { | |
61 | return initialize_pcc(); | |
62 | } | |
63 | ||
64 | if (!run_session_logic_with_infra(infra_config)) { | |
65 | pcep_log(LOG_ERR, | |
66 | "%s: Error initializing PCC session logic with infra.", | |
67 | __func__); | |
68 | return false; | |
69 | } | |
70 | ||
71 | return true; | |
72 | } | |
73 | ||
74 | ||
75 | /* this function is blocking */ | |
2816045a | 76 | bool initialize_pcc_wait_for_completion(void) |
74971473 JG |
77 | { |
78 | return run_session_logic_wait_for_completion(); | |
79 | } | |
80 | ||
81 | ||
2816045a | 82 | bool destroy_pcc(void) |
74971473 JG |
83 | { |
84 | if (!stop_session_logic()) { | |
85 | pcep_log(LOG_WARNING, "%s: Error stopping PCC session logic.", | |
86 | __func__); | |
87 | return false; | |
88 | } | |
89 | ||
90 | return true; | |
91 | } | |
92 | ||
93 | ||
2816045a | 94 | pcep_configuration *create_default_pcep_configuration(void) |
74971473 JG |
95 | { |
96 | pcep_configuration *config = | |
97 | pceplib_malloc(PCEPLIB_INFRA, sizeof(pcep_configuration)); | |
98 | memset(config, 0, sizeof(pcep_configuration)); | |
99 | ||
100 | config->keep_alive_seconds = DEFAULT_CONFIG_KEEP_ALIVE; | |
101 | /* This value will possibly be overwritten later with PCE config data */ | |
102 | config->keep_alive_pce_negotiated_timer_seconds = | |
103 | DEFAULT_CONFIG_KEEP_ALIVE; | |
104 | config->min_keep_alive_seconds = DEFAULT_MIN_CONFIG_KEEP_ALIVE; | |
105 | config->max_keep_alive_seconds = DEFAULT_MAX_CONFIG_KEEP_ALIVE; | |
106 | ||
107 | config->dead_timer_seconds = DEFAULT_CONFIG_DEAD_TIMER; | |
108 | /* This value will be overwritten later with PCE config data */ | |
109 | config->dead_timer_pce_negotiated_seconds = DEFAULT_CONFIG_DEAD_TIMER; | |
110 | config->min_dead_timer_seconds = DEFAULT_MIN_CONFIG_DEAD_TIMER; | |
111 | config->max_dead_timer_seconds = DEFAULT_MAX_CONFIG_DEAD_TIMER; | |
112 | ||
113 | config->request_time_seconds = DEFAULT_CONFIG_REQUEST_TIME; | |
114 | config->max_unknown_messages = DEFAULT_CONFIG_MAX_UNKNOWN_MESSAGES; | |
115 | config->max_unknown_requests = DEFAULT_CONFIG_MAX_UNKNOWN_REQUESTS; | |
116 | ||
117 | config->socket_connect_timeout_millis = | |
118 | DEFAULT_TCP_CONNECT_TIMEOUT_MILLIS; | |
119 | config->support_stateful_pce_lsp_update = true; | |
120 | config->support_pce_lsp_instantiation = true; | |
121 | config->support_include_db_version = true; | |
122 | config->lsp_db_version = 0; | |
123 | config->support_lsp_triggered_resync = true; | |
124 | config->support_lsp_delta_sync = true; | |
125 | config->support_pce_triggered_initial_sync = true; | |
126 | config->support_sr_te_pst = true; | |
127 | config->pcc_can_resolve_nai_to_sid = true; | |
128 | config->max_sid_depth = 0; | |
129 | config->dst_pcep_port = 0; | |
130 | config->src_pcep_port = 0; | |
131 | config->src_ip.src_ipv4.s_addr = INADDR_ANY; | |
132 | config->is_src_ipv6 = false; | |
133 | config->pcep_msg_versioning = create_default_pcep_versioning(); | |
134 | config->tcp_authentication_str[0] = '\0'; | |
135 | config->is_tcp_auth_md5 = true; | |
136 | ||
137 | return config; | |
138 | } | |
139 | ||
140 | void destroy_pcep_configuration(pcep_configuration *config) | |
141 | { | |
142 | destroy_pcep_versioning(config->pcep_msg_versioning); | |
143 | pceplib_free(PCEPLIB_INFRA, config); | |
144 | } | |
145 | ||
146 | pcep_session *connect_pce(pcep_configuration *config, struct in_addr *pce_ip) | |
147 | { | |
148 | return create_pcep_session(config, pce_ip); | |
149 | } | |
150 | ||
151 | pcep_session *connect_pce_ipv6(pcep_configuration *config, | |
152 | struct in6_addr *pce_ip) | |
153 | { | |
154 | return create_pcep_session_ipv6(config, pce_ip); | |
155 | } | |
156 | ||
157 | void disconnect_pce(pcep_session *session) | |
158 | { | |
159 | if (session_exists(session) == false) { | |
160 | pcep_log( | |
161 | LOG_WARNING, | |
162 | "%s: disconnect_pce session [%p] has already been deleted", | |
163 | __func__, session); | |
164 | return; | |
165 | } | |
166 | ||
167 | if (session->socket_comm_session == NULL | |
168 | || session->socket_comm_session->socket_fd < 0) { | |
169 | /* If the socket has already been closed, just destroy the | |
170 | * session */ | |
171 | destroy_pcep_session(session); | |
172 | } else { | |
173 | /* This will cause the session to be destroyed AFTER the close | |
174 | * message is sent */ | |
175 | session->destroy_session_after_write = true; | |
176 | ||
177 | /* Send a PCEP close message */ | |
178 | close_pcep_session(session); | |
179 | } | |
180 | } | |
181 | ||
182 | void send_message(pcep_session *session, struct pcep_message *msg, | |
183 | bool free_after_send) | |
184 | { | |
185 | if (session == NULL || msg == NULL) { | |
186 | pcep_log(LOG_DEBUG, | |
187 | "%s: send_message NULL params session [%p] msg [%p]", | |
188 | __func__, session, msg); | |
189 | ||
190 | return; | |
191 | } | |
192 | ||
193 | if (session_exists(session) == false) { | |
194 | pcep_log( | |
195 | LOG_WARNING, | |
196 | "%s: send_message session [%p] has already been deleted", | |
197 | __func__, session); | |
198 | return; | |
199 | } | |
200 | ||
201 | pcep_encode_message(msg, session->pcc_config.pcep_msg_versioning); | |
202 | socket_comm_session_send_message( | |
203 | session->socket_comm_session, (char *)msg->encoded_message, | |
204 | msg->encoded_message_length, free_after_send); | |
205 | ||
206 | increment_message_tx_counters(session, msg); | |
207 | ||
208 | if (free_after_send == true) { | |
209 | /* The encoded_message will be deleted once sent, so everything | |
210 | * else in the message will be freed */ | |
211 | msg->encoded_message = NULL; | |
212 | pcep_msg_free_message(msg); | |
213 | } | |
214 | } | |
215 | ||
216 | /* Returns true if the queue is empty, false otherwise */ | |
2816045a | 217 | bool event_queue_is_empty(void) |
74971473 JG |
218 | { |
219 | if (session_logic_event_queue_ == NULL) { | |
220 | pcep_log( | |
221 | LOG_WARNING, | |
222 | "%s: event_queue_is_empty Session Logic is not initialized yet", | |
223 | __func__); | |
224 | return false; | |
225 | } | |
226 | ||
227 | pthread_mutex_lock(&session_logic_event_queue_->event_queue_mutex); | |
228 | bool is_empty = | |
229 | (session_logic_event_queue_->event_queue->num_entries == 0); | |
230 | pthread_mutex_unlock(&session_logic_event_queue_->event_queue_mutex); | |
231 | ||
232 | return is_empty; | |
233 | } | |
234 | ||
235 | ||
236 | /* Return the number of events on the queue, 0 if empty */ | |
2816045a | 237 | uint32_t event_queue_num_events_available(void) |
74971473 JG |
238 | { |
239 | if (session_logic_event_queue_ == NULL) { | |
240 | pcep_log( | |
241 | LOG_WARNING, | |
242 | "%s: event_queue_num_events_available Session Logic is not initialized yet", | |
243 | __func__); | |
244 | return 0; | |
245 | } | |
246 | ||
247 | pthread_mutex_lock(&session_logic_event_queue_->event_queue_mutex); | |
248 | uint32_t num_events = | |
249 | session_logic_event_queue_->event_queue->num_entries; | |
250 | pthread_mutex_unlock(&session_logic_event_queue_->event_queue_mutex); | |
251 | ||
252 | return num_events; | |
253 | } | |
254 | ||
255 | ||
256 | /* Return the next event on the queue, NULL if empty */ | |
2816045a | 257 | struct pcep_event *event_queue_get_event(void) |
74971473 JG |
258 | { |
259 | if (session_logic_event_queue_ == NULL) { | |
260 | pcep_log( | |
261 | LOG_WARNING, | |
262 | "%s: event_queue_get_event Session Logic is not initialized yet", | |
263 | __func__); | |
264 | return NULL; | |
265 | } | |
266 | ||
267 | pthread_mutex_lock(&session_logic_event_queue_->event_queue_mutex); | |
268 | struct pcep_event *event = (struct pcep_event *)queue_dequeue( | |
269 | session_logic_event_queue_->event_queue); | |
270 | pthread_mutex_unlock(&session_logic_event_queue_->event_queue_mutex); | |
271 | ||
272 | return event; | |
273 | } | |
274 | ||
275 | ||
276 | /* Free the PCEP Event resources, including the PCEP message */ | |
277 | void destroy_pcep_event(struct pcep_event *event) | |
278 | { | |
279 | if (event == NULL) { | |
280 | pcep_log(LOG_WARNING, | |
281 | "%s: destroy_pcep_event cannot destroy NULL event", | |
282 | __func__); | |
283 | return; | |
284 | } | |
285 | ||
286 | if (event->event_type == MESSAGE_RECEIVED && event->message != NULL) { | |
287 | pcep_msg_free_message(event->message); | |
288 | } | |
289 | ||
290 | pceplib_free(PCEPLIB_INFRA, event); | |
291 | } | |
292 | ||
293 | const char *get_event_type_str(int event_type) | |
294 | { | |
295 | switch (event_type) { | |
296 | case MESSAGE_RECEIVED: | |
297 | return MESSAGE_RECEIVED_STR; | |
298 | break; | |
299 | case PCE_CLOSED_SOCKET: | |
300 | return PCE_CLOSED_SOCKET_STR; | |
301 | break; | |
302 | case PCE_SENT_PCEP_CLOSE: | |
303 | return PCE_SENT_PCEP_CLOSE_STR; | |
304 | break; | |
305 | case PCE_DEAD_TIMER_EXPIRED: | |
306 | return PCE_DEAD_TIMER_EXPIRED_STR; | |
307 | break; | |
308 | case PCE_OPEN_KEEP_WAIT_TIMER_EXPIRED: | |
309 | return PCE_OPEN_KEEP_WAIT_TIMER_EXPIRED_STR; | |
310 | break; | |
311 | case PCC_CONNECTED_TO_PCE: | |
312 | return PCC_CONNECTED_TO_PCE_STR; | |
313 | break; | |
314 | case PCC_PCEP_SESSION_CLOSED: | |
315 | return PCC_PCEP_SESSION_CLOSED_STR; | |
316 | break; | |
317 | case PCC_RCVD_INVALID_OPEN: | |
318 | return PCC_RCVD_INVALID_OPEN_STR; | |
319 | break; | |
320 | case PCC_RCVD_MAX_INVALID_MSGS: | |
321 | return PCC_RCVD_MAX_INVALID_MSGS_STR; | |
322 | break; | |
323 | case PCC_RCVD_MAX_UNKOWN_MSGS: | |
324 | return PCC_RCVD_MAX_UNKOWN_MSGS_STR; | |
325 | break; | |
326 | default: | |
327 | return UNKNOWN_EVENT_STR; | |
328 | break; | |
329 | } | |
330 | } | |
331 | ||
332 | void dump_pcep_session_counters(pcep_session *session) | |
333 | { | |
334 | if (session_exists(session) == false) { | |
335 | pcep_log( | |
336 | LOG_WARNING, | |
337 | "%s: dump_pcep_session_counters session [%p] has already been deleted", | |
338 | __func__, session); | |
339 | return; | |
340 | } | |
341 | ||
342 | /* Update the counters group name so that the PCE session connected time | |
343 | * is accurate */ | |
344 | time_t now = time(NULL); | |
345 | char counters_name[MAX_COUNTER_STR_LENGTH] = {0}; | |
346 | char ip_str[40] = {0}; | |
347 | if (session->socket_comm_session->is_ipv6) { | |
348 | inet_ntop(AF_INET6, | |
349 | &session->socket_comm_session->dest_sock_addr | |
350 | .dest_sock_addr_ipv6.sin6_addr, | |
351 | ip_str, 40); | |
352 | } else { | |
353 | inet_ntop(AF_INET, | |
354 | &session->socket_comm_session->dest_sock_addr | |
355 | .dest_sock_addr_ipv4.sin_addr, | |
356 | ip_str, 40); | |
357 | } | |
358 | snprintf(counters_name, MAX_COUNTER_STR_LENGTH, | |
359 | "PCEP Session [%d], connected to [%s] for [%u seconds]", | |
360 | session->session_id, ip_str, | |
361 | (uint32_t)(now - session->time_connected)); | |
362 | strlcpy(session->pcep_session_counters->counters_group_name, | |
363 | counters_name, | |
364 | sizeof(session->pcep_session_counters->counters_group_name)); | |
365 | ||
366 | dump_counters_group_to_log(session->pcep_session_counters); | |
367 | } | |
368 | ||
369 | void reset_pcep_session_counters(pcep_session *session) | |
370 | { | |
371 | if (session_exists(session) == false) { | |
372 | pcep_log( | |
373 | LOG_WARNING, | |
374 | "%s: reset_pcep_session_counters session [%p] has already been deleted", | |
375 | session); | |
376 | return; | |
377 | } | |
378 | ||
379 | reset_group_counters(session->pcep_session_counters); | |
380 | } |