xref: /unit/src/nxt_router.c (revision 2208:26af8eadc943)
1 
2 /*
3  * Copyright (C) Igor Sysoev
4  * Copyright (C) Valentin V. Bartenev
5  * Copyright (C) NGINX, Inc.
6  */
7 
8 #include <nxt_router.h>
9 #include <nxt_conf.h>
10 #include <nxt_status.h>
11 #if (NXT_TLS)
12 #include <nxt_cert.h>
13 #endif
14 #include <nxt_http.h>
15 #include <nxt_port_memory_int.h>
16 #include <nxt_unit_request.h>
17 #include <nxt_unit_response.h>
18 #include <nxt_router_request.h>
19 #include <nxt_app_queue.h>
20 #include <nxt_port_queue.h>
21 
22 #define NXT_SHARED_PORT_ID  0xFFFFu
23 
24 typedef struct {
25     nxt_str_t         type;
26     uint32_t          processes;
27     uint32_t          max_processes;
28     uint32_t          spare_processes;
29     nxt_msec_t        timeout;
30     nxt_msec_t        idle_timeout;
31     nxt_conf_value_t  *limits_value;
32     nxt_conf_value_t  *processes_value;
33     nxt_conf_value_t  *targets_value;
34 } nxt_router_app_conf_t;
35 
36 
37 typedef struct {
38     nxt_str_t         pass;
39     nxt_str_t         application;
40 } nxt_router_listener_conf_t;
41 
42 
43 #if (NXT_TLS)
44 
45 typedef struct {
46     nxt_str_t               name;
47     nxt_socket_conf_t       *socket_conf;
48     nxt_router_temp_conf_t  *temp_conf;
49     nxt_tls_init_t          *tls_init;
50     nxt_bool_t              last;
51 
52     nxt_queue_link_t        link;  /* for nxt_socket_conf_t.tls */
53 } nxt_router_tlssock_t;
54 
55 #endif
56 
57 
58 typedef struct {
59     nxt_str_t               *name;
60     nxt_socket_conf_t       *socket_conf;
61     nxt_router_temp_conf_t  *temp_conf;
62     nxt_bool_t              last;
63 } nxt_socket_rpc_t;
64 
65 
66 typedef struct {
67     nxt_app_t               *app;
68     nxt_router_temp_conf_t  *temp_conf;
69     uint8_t                 proto;  /* 1 bit */
70 } nxt_app_rpc_t;
71 
72 
73 typedef struct {
74     nxt_app_joint_t         *app_joint;
75     uint32_t                generation;
76     uint8_t                 proto;  /* 1 bit */
77 } nxt_app_joint_rpc_t;
78 
79 
80 static nxt_int_t nxt_router_prefork(nxt_task_t *task, nxt_process_t *process,
81     nxt_mp_t *mp);
82 static nxt_int_t nxt_router_start(nxt_task_t *task, nxt_process_data_t *data);
83 static void nxt_router_greet_controller(nxt_task_t *task,
84     nxt_port_t *controller_port);
85 
86 static nxt_int_t nxt_router_start_app_process(nxt_task_t *task, nxt_app_t *app);
87 
88 static void nxt_router_new_port_handler(nxt_task_t *task,
89     nxt_port_recv_msg_t *msg);
90 static void nxt_router_conf_data_handler(nxt_task_t *task,
91     nxt_port_recv_msg_t *msg);
92 static void nxt_router_app_restart_handler(nxt_task_t *task,
93     nxt_port_recv_msg_t *msg);
94 static void nxt_router_status_handler(nxt_task_t *task,
95     nxt_port_recv_msg_t *msg);
96 static void nxt_router_remove_pid_handler(nxt_task_t *task,
97     nxt_port_recv_msg_t *msg);
98 
99 static nxt_router_temp_conf_t *nxt_router_temp_conf(nxt_task_t *task);
100 static void nxt_router_conf_ready(nxt_task_t *task,
101     nxt_router_temp_conf_t *tmcf);
102 static void nxt_router_conf_send(nxt_task_t *task,
103     nxt_router_temp_conf_t *tmcf, nxt_port_msg_type_t type);
104 
105 static nxt_int_t nxt_router_conf_create(nxt_task_t *task,
106     nxt_router_temp_conf_t *tmcf, u_char *start, u_char *end);
107 static nxt_int_t nxt_router_conf_process_static(nxt_task_t *task,
108     nxt_router_conf_t *rtcf, nxt_conf_value_t *conf);
109 static nxt_http_forward_t *nxt_router_conf_forward(nxt_task_t *task,
110     nxt_mp_t *mp, nxt_conf_value_t *conf);
111 static nxt_int_t nxt_router_conf_forward_header(nxt_mp_t *mp,
112     nxt_conf_value_t *conf, nxt_http_forward_header_t *fh);
113 
114 static nxt_app_t *nxt_router_app_find(nxt_queue_t *queue, nxt_str_t *name);
115 static nxt_int_t nxt_router_apps_hash_test(nxt_lvlhsh_query_t *lhq, void *data);
116 static nxt_int_t nxt_router_apps_hash_add(nxt_router_conf_t *rtcf,
117     nxt_app_t *app);
118 static nxt_app_t *nxt_router_apps_hash_get(nxt_router_conf_t *rtcf,
119     nxt_str_t *name);
120 static void nxt_router_apps_hash_use(nxt_task_t *task, nxt_router_conf_t *rtcf,
121     int i);
122 
123 static nxt_int_t nxt_router_app_queue_init(nxt_task_t *task,
124     nxt_port_t *port);
125 static nxt_int_t nxt_router_port_queue_init(nxt_task_t *task,
126     nxt_port_t *port);
127 static nxt_int_t nxt_router_port_queue_map(nxt_task_t *task,
128     nxt_port_t *port, nxt_fd_t fd);
129 static void nxt_router_listen_socket_rpc_create(nxt_task_t *task,
130     nxt_router_temp_conf_t *tmcf, nxt_socket_conf_t *skcf);
131 static void nxt_router_listen_socket_ready(nxt_task_t *task,
132     nxt_port_recv_msg_t *msg, void *data);
133 static void nxt_router_listen_socket_error(nxt_task_t *task,
134     nxt_port_recv_msg_t *msg, void *data);
135 #if (NXT_TLS)
136 static void nxt_router_tls_rpc_handler(nxt_task_t *task,
137     nxt_port_recv_msg_t *msg, void *data);
138 static nxt_int_t nxt_router_conf_tls_insert(nxt_router_temp_conf_t *tmcf,
139     nxt_conf_value_t *value, nxt_socket_conf_t *skcf, nxt_tls_init_t *tls_init,
140     nxt_bool_t last);
141 #endif
142 static void nxt_router_app_rpc_create(nxt_task_t *task,
143     nxt_router_temp_conf_t *tmcf, nxt_app_t *app);
144 static void nxt_router_app_prefork_ready(nxt_task_t *task,
145     nxt_port_recv_msg_t *msg, void *data);
146 static void nxt_router_app_prefork_error(nxt_task_t *task,
147     nxt_port_recv_msg_t *msg, void *data);
148 static nxt_socket_conf_t *nxt_router_socket_conf(nxt_task_t *task,
149     nxt_router_temp_conf_t *tmcf, nxt_str_t *name);
150 static nxt_int_t nxt_router_listen_socket_find(nxt_router_temp_conf_t *tmcf,
151     nxt_socket_conf_t *nskcf, nxt_sockaddr_t *sa);
152 
153 static nxt_int_t nxt_router_engines_create(nxt_task_t *task,
154     nxt_router_t *router, nxt_router_temp_conf_t *tmcf,
155     const nxt_event_interface_t *interface);
156 static nxt_int_t nxt_router_engine_conf_create(nxt_router_temp_conf_t *tmcf,
157     nxt_router_engine_conf_t *recf);
158 static nxt_int_t nxt_router_engine_conf_update(nxt_router_temp_conf_t *tmcf,
159     nxt_router_engine_conf_t *recf);
160 static nxt_int_t nxt_router_engine_conf_delete(nxt_router_temp_conf_t *tmcf,
161     nxt_router_engine_conf_t *recf);
162 static nxt_int_t nxt_router_engine_joints_create(nxt_router_temp_conf_t *tmcf,
163     nxt_router_engine_conf_t *recf, nxt_queue_t *sockets,
164     nxt_work_handler_t handler);
165 static nxt_int_t nxt_router_engine_quit(nxt_router_temp_conf_t *tmcf,
166     nxt_router_engine_conf_t *recf);
167 static nxt_int_t nxt_router_engine_joints_delete(nxt_router_temp_conf_t *tmcf,
168     nxt_router_engine_conf_t *recf, nxt_queue_t *sockets);
169 
170 static nxt_int_t nxt_router_threads_create(nxt_task_t *task, nxt_runtime_t *rt,
171     nxt_router_temp_conf_t *tmcf);
172 static nxt_int_t nxt_router_thread_create(nxt_task_t *task, nxt_runtime_t *rt,
173     nxt_event_engine_t *engine);
174 static void nxt_router_apps_sort(nxt_task_t *task, nxt_router_t *router,
175     nxt_router_temp_conf_t *tmcf);
176 
177 static void nxt_router_engines_post(nxt_router_t *router,
178     nxt_router_temp_conf_t *tmcf);
179 static void nxt_router_engine_post(nxt_event_engine_t *engine,
180     nxt_work_t *jobs);
181 
182 static void nxt_router_thread_start(void *data);
183 static void nxt_router_rt_add_port(nxt_task_t *task, void *obj,
184     void *data);
185 static void nxt_router_listen_socket_create(nxt_task_t *task, void *obj,
186     void *data);
187 static void nxt_router_listen_socket_update(nxt_task_t *task, void *obj,
188     void *data);
189 static void nxt_router_listen_socket_delete(nxt_task_t *task, void *obj,
190     void *data);
191 static void nxt_router_worker_thread_quit(nxt_task_t *task, void *obj,
192     void *data);
193 static void nxt_router_listen_socket_close(nxt_task_t *task, void *obj,
194     void *data);
195 static void nxt_router_thread_exit_handler(nxt_task_t *task, void *obj,
196     void *data);
197 static void nxt_router_req_headers_ack_handler(nxt_task_t *task,
198     nxt_port_recv_msg_t *msg, nxt_request_rpc_data_t *req_rpc_data);
199 static void nxt_router_listen_socket_release(nxt_task_t *task,
200     nxt_socket_conf_t *skcf);
201 
202 static void nxt_router_app_port_ready(nxt_task_t *task,
203     nxt_port_recv_msg_t *msg, void *data);
204 static void nxt_router_app_port_error(nxt_task_t *task,
205     nxt_port_recv_msg_t *msg, void *data);
206 
207 static void nxt_router_app_use(nxt_task_t *task, nxt_app_t *app, int i);
208 static void nxt_router_app_unlink(nxt_task_t *task, nxt_app_t *app);
209 
210 static void nxt_router_app_port_release(nxt_task_t *task, nxt_app_t *app,
211     nxt_port_t *port, nxt_apr_action_t action);
212 static void nxt_router_app_port_get(nxt_task_t *task, nxt_app_t *app,
213     nxt_request_rpc_data_t *req_rpc_data);
214 static void nxt_router_http_request_error(nxt_task_t *task, void *obj,
215     void *data);
216 static void nxt_router_http_request_done(nxt_task_t *task, void *obj,
217     void *data);
218 
219 static void nxt_router_app_prepare_request(nxt_task_t *task,
220     nxt_request_rpc_data_t *req_rpc_data);
221 static nxt_buf_t *nxt_router_prepare_msg(nxt_task_t *task,
222     nxt_http_request_t *r, nxt_app_t *app, const nxt_str_t *prefix);
223 
224 static void nxt_router_app_timeout(nxt_task_t *task, void *obj, void *data);
225 static void nxt_router_adjust_idle_timer(nxt_task_t *task, void *obj,
226     void *data);
227 static void nxt_router_app_idle_timeout(nxt_task_t *task, void *obj,
228     void *data);
229 static void nxt_router_app_joint_release_handler(nxt_task_t *task, void *obj,
230     void *data);
231 static void nxt_router_free_app(nxt_task_t *task, void *obj, void *data);
232 
233 static const nxt_http_request_state_t  nxt_http_request_send_state;
234 static void nxt_http_request_send_body(nxt_task_t *task, void *obj, void *data);
235 
236 static void nxt_router_app_joint_use(nxt_task_t *task,
237     nxt_app_joint_t *app_joint, int i);
238 
239 static void nxt_router_http_request_release_post(nxt_task_t *task,
240     nxt_http_request_t *r);
241 static void nxt_router_http_request_release(nxt_task_t *task, void *obj,
242     void *data);
243 static void nxt_router_oosm_handler(nxt_task_t *task, nxt_port_recv_msg_t *msg);
244 static void nxt_router_get_port_handler(nxt_task_t *task,
245     nxt_port_recv_msg_t *msg);
246 static void nxt_router_get_mmap_handler(nxt_task_t *task,
247     nxt_port_recv_msg_t *msg);
248 
249 extern const nxt_http_request_state_t  nxt_http_websocket;
250 
251 nxt_router_t  *nxt_router;
252 
253 static const nxt_str_t http_prefix = nxt_string("HTTP_");
254 static const nxt_str_t empty_prefix = nxt_string("");
255 
256 static const nxt_str_t  *nxt_app_msg_prefix[] = {
257     &empty_prefix,
258     &empty_prefix,
259     &http_prefix,
260     &http_prefix,
261     &http_prefix,
262     &empty_prefix,
263 };
264 
265 
266 static const nxt_port_handlers_t  nxt_router_process_port_handlers = {
267     .quit         = nxt_signal_quit_handler,
268     .new_port     = nxt_router_new_port_handler,
269     .get_port     = nxt_router_get_port_handler,
270     .change_file  = nxt_port_change_log_file_handler,
271     .mmap         = nxt_port_mmap_handler,
272     .get_mmap     = nxt_router_get_mmap_handler,
273     .data         = nxt_router_conf_data_handler,
274     .app_restart  = nxt_router_app_restart_handler,
275     .status       = nxt_router_status_handler,
276     .remove_pid   = nxt_router_remove_pid_handler,
277     .access_log   = nxt_router_access_log_reopen_handler,
278     .rpc_ready    = nxt_port_rpc_handler,
279     .rpc_error    = nxt_port_rpc_handler,
280     .oosm         = nxt_router_oosm_handler,
281 };
282 
283 
284 const nxt_process_init_t  nxt_router_process = {
285     .name           = "router",
286     .type           = NXT_PROCESS_ROUTER,
287     .prefork        = nxt_router_prefork,
288     .restart        = 1,
289     .setup          = nxt_process_core_setup,
290     .start          = nxt_router_start,
291     .port_handlers  = &nxt_router_process_port_handlers,
292     .signals        = nxt_process_signals,
293 };
294 
295 
296 /* Queues of nxt_socket_conf_t */
297 nxt_queue_t  creating_sockets;
298 nxt_queue_t  pending_sockets;
299 nxt_queue_t  updating_sockets;
300 nxt_queue_t  keeping_sockets;
301 nxt_queue_t  deleting_sockets;
302 
303 
304 static nxt_int_t
nxt_router_prefork(nxt_task_t * task,nxt_process_t * process,nxt_mp_t * mp)305 nxt_router_prefork(nxt_task_t *task, nxt_process_t *process, nxt_mp_t *mp)
306 {
307     nxt_runtime_stop_app_processes(task, task->thread->runtime);
308 
309     return NXT_OK;
310 }
311 
312 
313 static nxt_int_t
nxt_router_start(nxt_task_t * task,nxt_process_data_t * data)314 nxt_router_start(nxt_task_t *task, nxt_process_data_t *data)
315 {
316     nxt_int_t      ret;
317     nxt_port_t     *controller_port;
318     nxt_router_t   *router;
319     nxt_runtime_t  *rt;
320 
321     rt = task->thread->runtime;
322 
323     nxt_log(task, NXT_LOG_INFO, "router started");
324 
325 #if (NXT_TLS)
326     rt->tls = nxt_service_get(rt->services, "SSL/TLS", "OpenSSL");
327     if (nxt_slow_path(rt->tls == NULL)) {
328         return NXT_ERROR;
329     }
330 
331     ret = rt->tls->library_init(task);
332     if (nxt_slow_path(ret != NXT_OK)) {
333         return ret;
334     }
335 #endif
336 
337     ret = nxt_http_init(task);
338     if (nxt_slow_path(ret != NXT_OK)) {
339         return ret;
340     }
341 
342     router = nxt_zalloc(sizeof(nxt_router_t));
343     if (nxt_slow_path(router == NULL)) {
344         return NXT_ERROR;
345     }
346 
347     nxt_queue_init(&router->engines);
348     nxt_queue_init(&router->sockets);
349     nxt_queue_init(&router->apps);
350 
351     nxt_router = router;
352 
353     controller_port = rt->port_by_type[NXT_PROCESS_CONTROLLER];
354     if (controller_port != NULL) {
355         nxt_router_greet_controller(task, controller_port);
356     }
357 
358     return NXT_OK;
359 }
360 
361 
362 static void
nxt_router_greet_controller(nxt_task_t * task,nxt_port_t * controller_port)363 nxt_router_greet_controller(nxt_task_t *task, nxt_port_t *controller_port)
364 {
365     nxt_port_socket_write(task, controller_port, NXT_PORT_MSG_PROCESS_READY,
366                           -1, 0, 0, NULL);
367 }
368 
369 
370 static void
nxt_router_start_app_process_handler(nxt_task_t * task,nxt_port_t * port,void * data)371 nxt_router_start_app_process_handler(nxt_task_t *task, nxt_port_t *port,
372     void *data)
373 {
374     size_t               size;
375     uint32_t             stream;
376     nxt_fd_t             port_fd, queue_fd;
377     nxt_int_t            ret;
378     nxt_app_t            *app;
379     nxt_buf_t            *b;
380     nxt_port_t           *dport;
381     nxt_runtime_t        *rt;
382     nxt_app_joint_rpc_t  *app_joint_rpc;
383 
384     app = data;
385 
386     nxt_thread_mutex_lock(&app->mutex);
387 
388     dport = app->proto_port;
389 
390     nxt_thread_mutex_unlock(&app->mutex);
391 
392     if (dport != NULL) {
393         nxt_debug(task, "app '%V' %p start process", &app->name, app);
394 
395         b = NULL;
396         port_fd = -1;
397         queue_fd = -1;
398 
399     } else {
400         if (app->proto_port_requests > 0) {
401             nxt_debug(task, "app '%V' %p wait for prototype process",
402                       &app->name, app);
403 
404             app->proto_port_requests++;
405 
406             goto skip;
407         }
408 
409         nxt_debug(task, "app '%V' %p start prototype process", &app->name, app);
410 
411         rt = task->thread->runtime;
412         dport = rt->port_by_type[NXT_PROCESS_MAIN];
413 
414         size = app->name.length + 1 + app->conf.length;
415 
416         b = nxt_buf_mem_alloc(task->thread->engine->mem_pool, size, 0);
417         if (nxt_slow_path(b == NULL)) {
418             goto failed;
419         }
420 
421         nxt_buf_cpystr(b, &app->name);
422         *b->mem.free++ = '\0';
423         nxt_buf_cpystr(b, &app->conf);
424 
425         port_fd = app->shared_port->pair[0];
426         queue_fd = app->shared_port->queue_fd;
427     }
428 
429     app_joint_rpc = nxt_port_rpc_register_handler_ex(task, port,
430                                                      nxt_router_app_port_ready,
431                                                      nxt_router_app_port_error,
432                                                    sizeof(nxt_app_joint_rpc_t));
433     if (nxt_slow_path(app_joint_rpc == NULL)) {
434         goto failed;
435     }
436 
437     stream = nxt_port_rpc_ex_stream(app_joint_rpc);
438 
439     ret = nxt_port_socket_write2(task, dport, NXT_PORT_MSG_START_PROCESS,
440                                  port_fd, queue_fd, stream, port->id, b);
441     if (nxt_slow_path(ret != NXT_OK)) {
442         nxt_port_rpc_cancel(task, port, stream);
443 
444         goto failed;
445     }
446 
447     app_joint_rpc->app_joint = app->joint;
448     app_joint_rpc->generation = app->generation;
449     app_joint_rpc->proto = (b != NULL);
450 
451     if (b != NULL) {
452         app->proto_port_requests++;
453 
454         b = NULL;
455     }
456 
457     nxt_router_app_joint_use(task, app->joint, 1);
458 
459 failed:
460 
461     if (b != NULL) {
462         nxt_mp_free(b->data, b);
463     }
464 
465 skip:
466 
467     nxt_router_app_use(task, app, -1);
468 }
469 
470 
471 static void
nxt_router_app_joint_use(nxt_task_t * task,nxt_app_joint_t * app_joint,int i)472 nxt_router_app_joint_use(nxt_task_t *task, nxt_app_joint_t *app_joint, int i)
473 {
474     app_joint->use_count += i;
475 
476     if (app_joint->use_count == 0) {
477         nxt_assert(app_joint->app == NULL);
478 
479         nxt_free(app_joint);
480     }
481 }
482 
483 
484 static nxt_int_t
nxt_router_start_app_process(nxt_task_t * task,nxt_app_t * app)485 nxt_router_start_app_process(nxt_task_t *task, nxt_app_t *app)
486 {
487     nxt_int_t      res;
488     nxt_port_t     *router_port;
489     nxt_runtime_t  *rt;
490 
491     nxt_debug(task, "app '%V' start process", &app->name);
492 
493     rt = task->thread->runtime;
494     router_port = rt->port_by_type[NXT_PROCESS_ROUTER];
495 
496     nxt_router_app_use(task, app, 1);
497 
498     res = nxt_port_post(task, router_port, nxt_router_start_app_process_handler,
499                         app);
500 
501     if (res == NXT_OK) {
502         return res;
503     }
504 
505     nxt_thread_mutex_lock(&app->mutex);
506 
507     app->pending_processes--;
508 
509     nxt_thread_mutex_unlock(&app->mutex);
510 
511     nxt_router_app_use(task, app, -1);
512 
513     return NXT_ERROR;
514 }
515 
516 
517 nxt_inline nxt_bool_t
nxt_router_msg_cancel(nxt_task_t * task,nxt_request_rpc_data_t * req_rpc_data)518 nxt_router_msg_cancel(nxt_task_t *task, nxt_request_rpc_data_t *req_rpc_data)
519 {
520     nxt_buf_t       *b, *next;
521     nxt_bool_t      cancelled;
522     nxt_port_t      *app_port;
523     nxt_msg_info_t  *msg_info;
524 
525     msg_info = &req_rpc_data->msg_info;
526 
527     if (msg_info->buf == NULL) {
528         return 0;
529     }
530 
531     app_port = req_rpc_data->app_port;
532 
533     if (app_port != NULL && app_port->id == NXT_SHARED_PORT_ID) {
534         cancelled = nxt_app_queue_cancel(app_port->queue,
535                                          msg_info->tracking_cookie,
536                                          req_rpc_data->stream);
537 
538         if (cancelled) {
539             nxt_debug(task, "stream #%uD: cancelled by router",
540                       req_rpc_data->stream);
541         }
542 
543     } else {
544         cancelled = 0;
545     }
546 
547     for (b = msg_info->buf; b != NULL; b = next) {
548         next = b->next;
549         b->next = NULL;
550 
551         if (b->is_port_mmap_sent) {
552             b->is_port_mmap_sent = cancelled == 0;
553         }
554 
555         b->completion_handler(task, b, b->parent);
556     }
557 
558     msg_info->buf = NULL;
559 
560     return cancelled;
561 }
562 
563 
564 nxt_inline nxt_bool_t
nxt_queue_chk_remove(nxt_queue_link_t * lnk)565 nxt_queue_chk_remove(nxt_queue_link_t *lnk)
566 {
567     if (lnk->next != NULL) {
568         nxt_queue_remove(lnk);
569 
570         lnk->next = NULL;
571 
572         return 1;
573     }
574 
575     return 0;
576 }
577 
578 
579 nxt_inline void
nxt_request_rpc_data_unlink(nxt_task_t * task,nxt_request_rpc_data_t * req_rpc_data)580 nxt_request_rpc_data_unlink(nxt_task_t *task,
581     nxt_request_rpc_data_t *req_rpc_data)
582 {
583     nxt_app_t           *app;
584     nxt_bool_t          unlinked;
585     nxt_http_request_t  *r;
586 
587     nxt_router_msg_cancel(task, req_rpc_data);
588 
589     app = req_rpc_data->app;
590 
591     if (req_rpc_data->app_port != NULL) {
592         nxt_router_app_port_release(task, app, req_rpc_data->app_port,
593                                     req_rpc_data->apr_action);
594 
595         req_rpc_data->app_port = NULL;
596     }
597 
598     r = req_rpc_data->request;
599 
600     if (r != NULL) {
601         r->timer_data = NULL;
602 
603         nxt_router_http_request_release_post(task, r);
604 
605         r->req_rpc_data = NULL;
606         req_rpc_data->request = NULL;
607 
608         if (app != NULL) {
609             unlinked = 0;
610 
611             nxt_thread_mutex_lock(&app->mutex);
612 
613             if (r->app_link.next != NULL) {
614                 nxt_queue_remove(&r->app_link);
615                 r->app_link.next = NULL;
616 
617                 unlinked = 1;
618             }
619 
620             nxt_thread_mutex_unlock(&app->mutex);
621 
622             if (unlinked) {
623                 nxt_mp_release(r->mem_pool);
624             }
625         }
626     }
627 
628     if (app != NULL) {
629         nxt_router_app_use(task, app, -1);
630 
631         req_rpc_data->app = NULL;
632     }
633 
634     if (req_rpc_data->msg_info.body_fd != -1) {
635         nxt_fd_close(req_rpc_data->msg_info.body_fd);
636 
637         req_rpc_data->msg_info.body_fd = -1;
638     }
639 
640     if (req_rpc_data->rpc_cancel) {
641         req_rpc_data->rpc_cancel = 0;
642 
643         nxt_port_rpc_cancel(task, task->thread->engine->port,
644                             req_rpc_data->stream);
645     }
646 }
647 
648 
649 static void
nxt_router_new_port_handler(nxt_task_t * task,nxt_port_recv_msg_t * msg)650 nxt_router_new_port_handler(nxt_task_t *task, nxt_port_recv_msg_t *msg)
651 {
652     nxt_int_t      res;
653     nxt_app_t      *app;
654     nxt_port_t     *port, *main_app_port;
655     nxt_runtime_t  *rt;
656 
657     nxt_port_new_port_handler(task, msg);
658 
659     port = msg->u.new_port;
660 
661     if (port != NULL && port->type == NXT_PROCESS_CONTROLLER) {
662         nxt_router_greet_controller(task, msg->u.new_port);
663     }
664 
665     if (port != NULL && port->type == NXT_PROCESS_PROTOTYPE)  {
666         nxt_port_rpc_handler(task, msg);
667 
668         return;
669     }
670 
671     if (port == NULL || port->type != NXT_PROCESS_APP) {
672 
673         if (msg->port_msg.stream == 0) {
674             return;
675         }
676 
677         msg->port_msg.type = _NXT_PORT_MSG_RPC_ERROR;
678 
679     } else {
680         if (msg->fd[1] != -1) {
681             res = nxt_router_port_queue_map(task, port, msg->fd[1]);
682             if (nxt_slow_path(res != NXT_OK)) {
683                 return;
684             }
685 
686             nxt_fd_close(msg->fd[1]);
687             msg->fd[1] = -1;
688         }
689     }
690 
691     if (msg->port_msg.stream != 0) {
692         nxt_port_rpc_handler(task, msg);
693         return;
694     }
695 
696     nxt_debug(task, "new port id %d (%d)", port->id, port->type);
697 
698     /*
699      * Port with "id == 0" is application 'main' port and it always
700      * should come with non-zero stream.
701      */
702     nxt_assert(port->id != 0);
703 
704     /* Find 'main' app port and get app reference. */
705     rt = task->thread->runtime;
706 
707     /*
708      * It is safe to access 'runtime->ports' hash because 'NEW_PORT'
709      * sent to main port (with id == 0) and processed in main thread.
710      */
711     main_app_port = nxt_port_hash_find(&rt->ports, port->pid, 0);
712     nxt_assert(main_app_port != NULL);
713 
714     app = main_app_port->app;
715 
716     if (nxt_fast_path(app != NULL)) {
717         nxt_thread_mutex_lock(&app->mutex);
718 
719         /* TODO here should be find-and-add code because there can be
720            port waiters in port_hash */
721         nxt_port_hash_add(&app->port_hash, port);
722         app->port_hash_count++;
723 
724         nxt_thread_mutex_unlock(&app->mutex);
725 
726         port->app = app;
727     }
728 
729     port->main_app_port = main_app_port;
730 
731     nxt_port_socket_write(task, port, NXT_PORT_MSG_PORT_ACK, -1, 0, 0, NULL);
732 }
733 
734 
735 static void
nxt_router_conf_data_handler(nxt_task_t * task,nxt_port_recv_msg_t * msg)736 nxt_router_conf_data_handler(nxt_task_t *task, nxt_port_recv_msg_t *msg)
737 {
738     void                    *p;
739     size_t                  size;
740     nxt_int_t               ret;
741     nxt_port_t              *port;
742     nxt_router_temp_conf_t  *tmcf;
743 
744     port = nxt_runtime_port_find(task->thread->runtime,
745                                  msg->port_msg.pid,
746                                  msg->port_msg.reply_port);
747     if (nxt_slow_path(port == NULL)) {
748         nxt_alert(task, "conf_data_handler: reply port not found");
749         return;
750     }
751 
752     p = MAP_FAILED;
753 
754     /*
755      * Ancient compilers like gcc 4.8.5 on CentOS 7 wants 'size' to be
756      * initialized in 'cleanup' section.
757      */
758     size = 0;
759 
760     tmcf = nxt_router_temp_conf(task);
761     if (nxt_slow_path(tmcf == NULL)) {
762         goto fail;
763     }
764 
765     if (nxt_slow_path(msg->fd[0] == -1)) {
766         nxt_alert(task, "conf_data_handler: invalid shm fd");
767         goto fail;
768     }
769 
770     if (nxt_buf_mem_used_size(&msg->buf->mem) != sizeof(size_t)) {
771         nxt_alert(task, "conf_data_handler: unexpected buffer size (%d)",
772                   (int) nxt_buf_mem_used_size(&msg->buf->mem));
773         goto fail;
774     }
775 
776     nxt_memcpy(&size, msg->buf->mem.pos, sizeof(size_t));
777 
778     p = nxt_mem_mmap(NULL, size, PROT_READ, MAP_SHARED, msg->fd[0], 0);
779 
780     nxt_fd_close(msg->fd[0]);
781     msg->fd[0] = -1;
782 
783     if (nxt_slow_path(p == MAP_FAILED)) {
784         goto fail;
785     }
786 
787     nxt_debug(task, "conf_data_handler(%uz): %*s", size, size, p);
788 
789     tmcf->router_conf->router = nxt_router;
790     tmcf->stream = msg->port_msg.stream;
791     tmcf->port = port;
792 
793     nxt_port_use(task, tmcf->port, 1);
794 
795     ret = nxt_router_conf_create(task, tmcf, p, nxt_pointer_to(p, size));
796 
797     if (nxt_fast_path(ret == NXT_OK)) {
798         nxt_router_conf_apply(task, tmcf, NULL);
799 
800     } else {
801         nxt_router_conf_error(task, tmcf);
802     }
803 
804     goto cleanup;
805 
806 fail:
807 
808     nxt_port_socket_write(task, port, NXT_PORT_MSG_RPC_ERROR, -1,
809                           msg->port_msg.stream, 0, NULL);
810 
811     if (tmcf != NULL) {
812         nxt_mp_release(tmcf->mem_pool);
813     }
814 
815 cleanup:
816 
817     if (p != MAP_FAILED) {
818         nxt_mem_munmap(p, size);
819     }
820 
821     if (msg->fd[0] != -1) {
822         nxt_fd_close(msg->fd[0]);
823         msg->fd[0] = -1;
824     }
825 }
826 
827 
828 static void
nxt_router_app_restart_handler(nxt_task_t * task,nxt_port_recv_msg_t * msg)829 nxt_router_app_restart_handler(nxt_task_t *task, nxt_port_recv_msg_t *msg)
830 {
831     nxt_app_t            *app;
832     nxt_int_t            ret;
833     nxt_str_t            app_name;
834     nxt_port_t           *reply_port, *shared_port, *old_shared_port;
835     nxt_port_t           *proto_port;
836     nxt_port_msg_type_t  reply;
837 
838     reply_port = nxt_runtime_port_find(task->thread->runtime,
839                                        msg->port_msg.pid,
840                                        msg->port_msg.reply_port);
841     if (nxt_slow_path(reply_port == NULL)) {
842         nxt_alert(task, "app_restart_handler: reply port not found");
843         return;
844     }
845 
846     app_name.length = nxt_buf_mem_used_size(&msg->buf->mem);
847     app_name.start = msg->buf->mem.pos;
848 
849     nxt_debug(task, "app_restart_handler: %V", &app_name);
850 
851     app = nxt_router_app_find(&nxt_router->apps, &app_name);
852 
853     if (nxt_fast_path(app != NULL)) {
854         shared_port = nxt_port_new(task, NXT_SHARED_PORT_ID, nxt_pid,
855                                    NXT_PROCESS_APP);
856         if (nxt_slow_path(shared_port == NULL)) {
857             goto fail;
858         }
859 
860         ret = nxt_port_socket_init(task, shared_port, 0);
861         if (nxt_slow_path(ret != NXT_OK)) {
862             nxt_port_use(task, shared_port, -1);
863             goto fail;
864         }
865 
866         ret = nxt_router_app_queue_init(task, shared_port);
867         if (nxt_slow_path(ret != NXT_OK)) {
868             nxt_port_write_close(shared_port);
869             nxt_port_read_close(shared_port);
870             nxt_port_use(task, shared_port, -1);
871             goto fail;
872         }
873 
874         nxt_port_write_enable(task, shared_port);
875 
876         nxt_thread_mutex_lock(&app->mutex);
877 
878         proto_port = app->proto_port;
879 
880         if (proto_port != NULL) {
881             nxt_debug(task, "send QUIT to prototype '%V' pid %PI", &app->name,
882                       proto_port->pid);
883 
884             app->proto_port = NULL;
885             proto_port->app = NULL;
886         }
887 
888         app->generation++;
889 
890         shared_port->app = app;
891 
892         old_shared_port = app->shared_port;
893         old_shared_port->app = NULL;
894 
895         app->shared_port = shared_port;
896 
897         nxt_thread_mutex_unlock(&app->mutex);
898 
899         nxt_port_close(task, old_shared_port);
900         nxt_port_use(task, old_shared_port, -1);
901 
902         if (proto_port != NULL) {
903             (void) nxt_port_socket_write(task, proto_port, NXT_PORT_MSG_QUIT,
904                                          -1, 0, 0, NULL);
905 
906             nxt_port_close(task, proto_port);
907 
908             nxt_port_use(task, proto_port, -1);
909         }
910 
911         reply = NXT_PORT_MSG_RPC_READY_LAST;
912 
913     } else {
914 
915 fail:
916 
917         reply = NXT_PORT_MSG_RPC_ERROR;
918     }
919 
920     nxt_port_socket_write(task, reply_port, reply, -1, msg->port_msg.stream,
921                           0, NULL);
922 }
923 
924 
925 static void
nxt_router_status_handler(nxt_task_t * task,nxt_port_recv_msg_t * msg)926 nxt_router_status_handler(nxt_task_t *task, nxt_port_recv_msg_t *msg)
927 {
928     u_char               *p;
929     size_t               alloc;
930     nxt_app_t            *app;
931     nxt_buf_t            *b;
932     nxt_uint_t           type;
933     nxt_port_t           *port;
934     nxt_status_app_t     *app_stat;
935     nxt_event_engine_t   *engine;
936     nxt_status_report_t  *report;
937 
938     port = nxt_runtime_port_find(task->thread->runtime,
939                                  msg->port_msg.pid,
940                                  msg->port_msg.reply_port);
941     if (nxt_slow_path(port == NULL)) {
942         nxt_alert(task, "nxt_router_status_handler(): reply port not found");
943         return;
944     }
945 
946     alloc = sizeof(nxt_status_report_t);
947 
948     nxt_queue_each(app, &nxt_router->apps, nxt_app_t, link) {
949 
950         alloc += sizeof(nxt_status_app_t) + app->name.length;
951 
952     } nxt_queue_loop;
953 
954     b = nxt_buf_mem_alloc(port->mem_pool, alloc, 0);
955     if (nxt_slow_path(b == NULL)) {
956         type = NXT_PORT_MSG_RPC_ERROR;
957         goto fail;
958     }
959 
960     report = (nxt_status_report_t *) b->mem.free;
961     b->mem.free = b->mem.end;
962 
963     nxt_memzero(report, sizeof(nxt_status_report_t));
964 
965     nxt_queue_each(engine, &nxt_router->engines, nxt_event_engine_t, link0) {
966 
967         report->accepted_conns += engine->accepted_conns_cnt;
968         report->idle_conns += engine->idle_conns_cnt;
969         report->closed_conns += engine->closed_conns_cnt;
970         report->requests += engine->requests_cnt;
971 
972     } nxt_queue_loop;
973 
974     report->apps_count = 0;
975     app_stat = report->apps;
976     p = b->mem.end;
977 
978     nxt_queue_each(app, &nxt_router->apps, nxt_app_t, link) {
979         p -= app->name.length;
980 
981         nxt_memcpy(p, app->name.start, app->name.length);
982 
983         app_stat->name.length = app->name.length;
984         app_stat->name.start = (u_char *) (p - b->mem.pos);
985 
986         app_stat->active_requests = app->active_requests;
987         app_stat->pending_processes = app->pending_processes;
988         app_stat->processes = app->processes;
989         app_stat->idle_processes = app->idle_processes;
990 
991         report->apps_count++;
992         app_stat++;
993     } nxt_queue_loop;
994 
995     type = NXT_PORT_MSG_RPC_READY_LAST;
996 
997 fail:
998 
999     nxt_port_socket_write(task, port, type, -1, msg->port_msg.stream, 0, b);
1000 }
1001 
1002 
1003 static void
nxt_router_app_process_remove_pid(nxt_task_t * task,nxt_port_t * port,void * data)1004 nxt_router_app_process_remove_pid(nxt_task_t *task, nxt_port_t *port,
1005     void *data)
1006 {
1007     union {
1008         nxt_pid_t  removed_pid;
1009         void       *data;
1010     } u;
1011 
1012     u.data = data;
1013 
1014     nxt_port_rpc_remove_peer(task, port, u.removed_pid);
1015 }
1016 
1017 
1018 static void
nxt_router_remove_pid_handler(nxt_task_t * task,nxt_port_recv_msg_t * msg)1019 nxt_router_remove_pid_handler(nxt_task_t *task, nxt_port_recv_msg_t *msg)
1020 {
1021     nxt_event_engine_t  *engine;
1022 
1023     nxt_port_remove_pid_handler(task, msg);
1024 
1025     nxt_queue_each(engine, &nxt_router->engines, nxt_event_engine_t, link0)
1026     {
1027         if (nxt_fast_path(engine->port != NULL)) {
1028             nxt_port_post(task, engine->port, nxt_router_app_process_remove_pid,
1029                           msg->u.data);
1030         }
1031     }
1032     nxt_queue_loop;
1033 
1034     if (msg->port_msg.stream == 0) {
1035         return;
1036     }
1037 
1038     msg->port_msg.type = _NXT_PORT_MSG_RPC_ERROR;
1039 
1040     nxt_port_rpc_handler(task, msg);
1041 }
1042 
1043 
1044 static nxt_router_temp_conf_t *
nxt_router_temp_conf(nxt_task_t * task)1045 nxt_router_temp_conf(nxt_task_t *task)
1046 {
1047     nxt_mp_t                *mp, *tmp;
1048     nxt_router_conf_t       *rtcf;
1049     nxt_router_temp_conf_t  *tmcf;
1050 
1051     mp = nxt_mp_create(1024, 128, 256, 32);
1052     if (nxt_slow_path(mp == NULL)) {
1053         return NULL;
1054     }
1055 
1056     rtcf = nxt_mp_zget(mp, sizeof(nxt_router_conf_t));
1057     if (nxt_slow_path(rtcf == NULL)) {
1058         goto fail;
1059     }
1060 
1061     rtcf->mem_pool = mp;
1062 
1063     rtcf->var_fields = nxt_array_create(mp, 4, sizeof(nxt_var_field_t));
1064     if (nxt_slow_path(rtcf->var_fields == NULL)) {
1065         goto fail;
1066     }
1067 
1068     tmp = nxt_mp_create(1024, 128, 256, 32);
1069     if (nxt_slow_path(tmp == NULL)) {
1070         goto fail;
1071     }
1072 
1073     tmcf = nxt_mp_zget(tmp, sizeof(nxt_router_temp_conf_t));
1074     if (nxt_slow_path(tmcf == NULL)) {
1075         goto temp_fail;
1076     }
1077 
1078     tmcf->mem_pool = tmp;
1079     tmcf->router_conf = rtcf;
1080     tmcf->count = 1;
1081     tmcf->engine = task->thread->engine;
1082 
1083     tmcf->engines = nxt_array_create(tmcf->mem_pool, 4,
1084                                      sizeof(nxt_router_engine_conf_t));
1085     if (nxt_slow_path(tmcf->engines == NULL)) {
1086         goto temp_fail;
1087     }
1088 
1089     nxt_queue_init(&creating_sockets);
1090     nxt_queue_init(&pending_sockets);
1091     nxt_queue_init(&updating_sockets);
1092     nxt_queue_init(&keeping_sockets);
1093     nxt_queue_init(&deleting_sockets);
1094 
1095 #if (NXT_TLS)
1096     nxt_queue_init(&tmcf->tls);
1097 #endif
1098 
1099     nxt_queue_init(&tmcf->apps);
1100     nxt_queue_init(&tmcf->previous);
1101 
1102     return tmcf;
1103 
1104 temp_fail:
1105 
1106     nxt_mp_destroy(tmp);
1107 
1108 fail:
1109 
1110     nxt_mp_destroy(mp);
1111 
1112     return NULL;
1113 }
1114 
1115 
1116 nxt_inline nxt_bool_t
nxt_router_app_can_start(nxt_app_t * app)1117 nxt_router_app_can_start(nxt_app_t *app)
1118 {
1119     return app->processes + app->pending_processes < app->max_processes
1120             && app->pending_processes < app->max_pending_processes;
1121 }
1122 
1123 
1124 nxt_inline nxt_bool_t
nxt_router_app_need_start(nxt_app_t * app)1125 nxt_router_app_need_start(nxt_app_t *app)
1126 {
1127     return (app->active_requests
1128               > app->port_hash_count + app->pending_processes)
1129            || (app->spare_processes
1130                 > app->idle_processes + app->pending_processes);
1131 }
1132 
1133 
1134 void
nxt_router_conf_apply(nxt_task_t * task,void * obj,void * data)1135 nxt_router_conf_apply(nxt_task_t *task, void *obj, void *data)
1136 {
1137     nxt_int_t                    ret;
1138     nxt_app_t                    *app;
1139     nxt_router_t                 *router;
1140     nxt_runtime_t                *rt;
1141     nxt_queue_link_t             *qlk;
1142     nxt_socket_conf_t            *skcf;
1143     nxt_router_conf_t            *rtcf;
1144     nxt_router_temp_conf_t       *tmcf;
1145     const nxt_event_interface_t  *interface;
1146 #if (NXT_TLS)
1147     nxt_router_tlssock_t         *tls;
1148 #endif
1149 
1150     tmcf = obj;
1151 
1152     qlk = nxt_queue_first(&pending_sockets);
1153 
1154     if (qlk != nxt_queue_tail(&pending_sockets)) {
1155         nxt_queue_remove(qlk);
1156         nxt_queue_insert_tail(&creating_sockets, qlk);
1157 
1158         skcf = nxt_queue_link_data(qlk, nxt_socket_conf_t, link);
1159 
1160         nxt_router_listen_socket_rpc_create(task, tmcf, skcf);
1161 
1162         return;
1163     }
1164 
1165 #if (NXT_TLS)
1166     qlk = nxt_queue_last(&tmcf->tls);
1167 
1168     if (qlk != nxt_queue_head(&tmcf->tls)) {
1169         nxt_queue_remove(qlk);
1170 
1171         tls = nxt_queue_link_data(qlk, nxt_router_tlssock_t, link);
1172 
1173         nxt_cert_store_get(task, &tls->name, tmcf->mem_pool,
1174                            nxt_router_tls_rpc_handler, tls);
1175         return;
1176     }
1177 #endif
1178 
1179     nxt_queue_each(app, &tmcf->apps, nxt_app_t, link) {
1180 
1181         if (nxt_router_app_need_start(app)) {
1182             nxt_router_app_rpc_create(task, tmcf, app);
1183             return;
1184         }
1185 
1186     } nxt_queue_loop;
1187 
1188     rtcf = tmcf->router_conf;
1189 
1190     if (rtcf->access_log != NULL && rtcf->access_log->fd == -1) {
1191         nxt_router_access_log_open(task, tmcf);
1192         return;
1193     }
1194 
1195     rt = task->thread->runtime;
1196 
1197     interface = nxt_service_get(rt->services, "engine", NULL);
1198 
1199     router = rtcf->router;
1200 
1201     ret = nxt_router_engines_create(task, router, tmcf, interface);
1202     if (nxt_slow_path(ret != NXT_OK)) {
1203         goto fail;
1204     }
1205 
1206     ret = nxt_router_threads_create(task, rt, tmcf);
1207     if (nxt_slow_path(ret != NXT_OK)) {
1208         goto fail;
1209     }
1210 
1211     nxt_router_apps_sort(task, router, tmcf);
1212 
1213     nxt_router_apps_hash_use(task, rtcf, 1);
1214 
1215     nxt_router_engines_post(router, tmcf);
1216 
1217     nxt_queue_add(&router->sockets, &updating_sockets);
1218     nxt_queue_add(&router->sockets, &creating_sockets);
1219 
1220     if (router->access_log != rtcf->access_log) {
1221         nxt_router_access_log_use(&router->lock, rtcf->access_log);
1222 
1223         nxt_router_access_log_release(task, &router->lock, router->access_log);
1224 
1225         router->access_log = rtcf->access_log;
1226     }
1227 
1228     nxt_router_conf_ready(task, tmcf);
1229 
1230     return;
1231 
1232 fail:
1233 
1234     nxt_router_conf_error(task, tmcf);
1235 
1236     return;
1237 }
1238 
1239 
1240 static void
nxt_router_conf_wait(nxt_task_t * task,void * obj,void * data)1241 nxt_router_conf_wait(nxt_task_t *task, void *obj, void *data)
1242 {
1243     nxt_joint_job_t  *job;
1244 
1245     job = obj;
1246 
1247     nxt_router_conf_ready(task, job->tmcf);
1248 }
1249 
1250 
1251 static void
nxt_router_conf_ready(nxt_task_t * task,nxt_router_temp_conf_t * tmcf)1252 nxt_router_conf_ready(nxt_task_t *task, nxt_router_temp_conf_t *tmcf)
1253 {
1254     uint32_t               count;
1255     nxt_router_conf_t      *rtcf;
1256     nxt_thread_spinlock_t  *lock;
1257 
1258     nxt_debug(task, "temp conf %p count: %D", tmcf, tmcf->count);
1259 
1260     if (--tmcf->count > 0) {
1261         return;
1262     }
1263 
1264     nxt_router_conf_send(task, tmcf, NXT_PORT_MSG_RPC_READY_LAST);
1265 
1266     rtcf = tmcf->router_conf;
1267 
1268     lock = &rtcf->router->lock;
1269 
1270     nxt_thread_spin_lock(lock);
1271 
1272     count = rtcf->count;
1273 
1274     nxt_thread_spin_unlock(lock);
1275 
1276     nxt_debug(task, "rtcf %p: %D", rtcf, count);
1277 
1278     if (count == 0) {
1279         nxt_router_apps_hash_use(task, rtcf, -1);
1280 
1281         nxt_router_access_log_release(task, lock, rtcf->access_log);
1282 
1283         nxt_mp_destroy(rtcf->mem_pool);
1284     }
1285 
1286     nxt_mp_release(tmcf->mem_pool);
1287 }
1288 
1289 
1290 void
nxt_router_conf_error(nxt_task_t * task,nxt_router_temp_conf_t * tmcf)1291 nxt_router_conf_error(nxt_task_t *task, nxt_router_temp_conf_t *tmcf)
1292 {
1293     nxt_app_t          *app;
1294     nxt_socket_t       s;
1295     nxt_router_t       *router;
1296     nxt_queue_link_t   *qlk;
1297     nxt_socket_conf_t  *skcf;
1298     nxt_router_conf_t  *rtcf;
1299 
1300     nxt_alert(task, "failed to apply new conf");
1301 
1302     for (qlk = nxt_queue_first(&creating_sockets);
1303          qlk != nxt_queue_tail(&creating_sockets);
1304          qlk = nxt_queue_next(qlk))
1305     {
1306         skcf = nxt_queue_link_data(qlk, nxt_socket_conf_t, link);
1307         s = skcf->listen->socket;
1308 
1309         if (s != -1) {
1310             nxt_socket_close(task, s);
1311         }
1312 
1313         nxt_free(skcf->listen);
1314     }
1315 
1316     rtcf = tmcf->router_conf;
1317 
1318     nxt_queue_each(app, &tmcf->apps, nxt_app_t, link) {
1319 
1320         nxt_router_app_unlink(task, app);
1321 
1322     } nxt_queue_loop;
1323 
1324     router = rtcf->router;
1325 
1326     nxt_queue_add(&router->sockets, &keeping_sockets);
1327     nxt_queue_add(&router->sockets, &deleting_sockets);
1328 
1329     nxt_queue_add(&router->apps, &tmcf->previous);
1330 
1331     // TODO: new engines and threads
1332 
1333     nxt_router_access_log_release(task, &router->lock, rtcf->access_log);
1334 
1335     nxt_mp_destroy(rtcf->mem_pool);
1336 
1337     nxt_router_conf_send(task, tmcf, NXT_PORT_MSG_RPC_ERROR);
1338 
1339     nxt_mp_release(tmcf->mem_pool);
1340 }
1341 
1342 
1343 static void
nxt_router_conf_send(nxt_task_t * task,nxt_router_temp_conf_t * tmcf,nxt_port_msg_type_t type)1344 nxt_router_conf_send(nxt_task_t *task, nxt_router_temp_conf_t *tmcf,
1345     nxt_port_msg_type_t type)
1346 {
1347     nxt_port_socket_write(task, tmcf->port, type, -1, tmcf->stream, 0, NULL);
1348 
1349     nxt_port_use(task, tmcf->port, -1);
1350 
1351     tmcf->port = NULL;
1352 }
1353 
1354 
1355 static nxt_conf_map_t  nxt_router_conf[] = {
1356     {
1357         nxt_string("listeners_threads"),
1358         NXT_CONF_MAP_INT32,
1359         offsetof(nxt_router_conf_t, threads),
1360     },
1361 };
1362 
1363 
1364 static nxt_conf_map_t  nxt_router_app_conf[] = {
1365     {
1366         nxt_string("type"),
1367         NXT_CONF_MAP_STR,
1368         offsetof(nxt_router_app_conf_t, type),
1369     },
1370 
1371     {
1372         nxt_string("limits"),
1373         NXT_CONF_MAP_PTR,
1374         offsetof(nxt_router_app_conf_t, limits_value),
1375     },
1376 
1377     {
1378         nxt_string("processes"),
1379         NXT_CONF_MAP_INT32,
1380         offsetof(nxt_router_app_conf_t, processes),
1381     },
1382 
1383     {
1384         nxt_string("processes"),
1385         NXT_CONF_MAP_PTR,
1386         offsetof(nxt_router_app_conf_t, processes_value),
1387     },
1388 
1389     {
1390         nxt_string("targets"),
1391         NXT_CONF_MAP_PTR,
1392         offsetof(nxt_router_app_conf_t, targets_value),
1393     },
1394 };
1395 
1396 
1397 static nxt_conf_map_t  nxt_router_app_limits_conf[] = {
1398     {
1399         nxt_string("timeout"),
1400         NXT_CONF_MAP_MSEC,
1401         offsetof(nxt_router_app_conf_t, timeout),
1402     },
1403 };
1404 
1405 
1406 static nxt_conf_map_t  nxt_router_app_processes_conf[] = {
1407     {
1408         nxt_string("spare"),
1409         NXT_CONF_MAP_INT32,
1410         offsetof(nxt_router_app_conf_t, spare_processes),
1411     },
1412 
1413     {
1414         nxt_string("max"),
1415         NXT_CONF_MAP_INT32,
1416         offsetof(nxt_router_app_conf_t, max_processes),
1417     },
1418 
1419     {
1420         nxt_string("idle_timeout"),
1421         NXT_CONF_MAP_MSEC,
1422         offsetof(nxt_router_app_conf_t, idle_timeout),
1423     },
1424 };
1425 
1426 
1427 static nxt_conf_map_t  nxt_router_listener_conf[] = {
1428     {
1429         nxt_string("pass"),
1430         NXT_CONF_MAP_STR_COPY,
1431         offsetof(nxt_router_listener_conf_t, pass),
1432     },
1433 
1434     {
1435         nxt_string("application"),
1436         NXT_CONF_MAP_STR_COPY,
1437         offsetof(nxt_router_listener_conf_t, application),
1438     },
1439 };
1440 
1441 
1442 static nxt_conf_map_t  nxt_router_http_conf[] = {
1443     {
1444         nxt_string("header_buffer_size"),
1445         NXT_CONF_MAP_SIZE,
1446         offsetof(nxt_socket_conf_t, header_buffer_size),
1447     },
1448 
1449     {
1450         nxt_string("large_header_buffer_size"),
1451         NXT_CONF_MAP_SIZE,
1452         offsetof(nxt_socket_conf_t, large_header_buffer_size),
1453     },
1454 
1455     {
1456         nxt_string("large_header_buffers"),
1457         NXT_CONF_MAP_SIZE,
1458         offsetof(nxt_socket_conf_t, large_header_buffers),
1459     },
1460 
1461     {
1462         nxt_string("body_buffer_size"),
1463         NXT_CONF_MAP_SIZE,
1464         offsetof(nxt_socket_conf_t, body_buffer_size),
1465     },
1466 
1467     {
1468         nxt_string("max_body_size"),
1469         NXT_CONF_MAP_SIZE,
1470         offsetof(nxt_socket_conf_t, max_body_size),
1471     },
1472 
1473     {
1474         nxt_string("idle_timeout"),
1475         NXT_CONF_MAP_MSEC,
1476         offsetof(nxt_socket_conf_t, idle_timeout),
1477     },
1478 
1479     {
1480         nxt_string("header_read_timeout"),
1481         NXT_CONF_MAP_MSEC,
1482         offsetof(nxt_socket_conf_t, header_read_timeout),
1483     },
1484 
1485     {
1486         nxt_string("body_read_timeout"),
1487         NXT_CONF_MAP_MSEC,
1488         offsetof(nxt_socket_conf_t, body_read_timeout),
1489     },
1490 
1491     {
1492         nxt_string("send_timeout"),
1493         NXT_CONF_MAP_MSEC,
1494         offsetof(nxt_socket_conf_t, send_timeout),
1495     },
1496 
1497     {
1498         nxt_string("body_temp_path"),
1499         NXT_CONF_MAP_STR,
1500         offsetof(nxt_socket_conf_t, body_temp_path),
1501     },
1502 
1503     {
1504         nxt_string("discard_unsafe_fields"),
1505         NXT_CONF_MAP_INT8,
1506         offsetof(nxt_socket_conf_t, discard_unsafe_fields),
1507     },
1508 };
1509 
1510 
1511 static nxt_conf_map_t  nxt_router_websocket_conf[] = {
1512     {
1513         nxt_string("max_frame_size"),
1514         NXT_CONF_MAP_SIZE,
1515         offsetof(nxt_websocket_conf_t, max_frame_size),
1516     },
1517 
1518     {
1519         nxt_string("read_timeout"),
1520         NXT_CONF_MAP_MSEC,
1521         offsetof(nxt_websocket_conf_t, read_timeout),
1522     },
1523 
1524     {
1525         nxt_string("keepalive_interval"),
1526         NXT_CONF_MAP_MSEC,
1527         offsetof(nxt_websocket_conf_t, keepalive_interval),
1528     },
1529 
1530 };
1531 
1532 
1533 static nxt_int_t
nxt_router_conf_create(nxt_task_t * task,nxt_router_temp_conf_t * tmcf,u_char * start,u_char * end)1534 nxt_router_conf_create(nxt_task_t *task, nxt_router_temp_conf_t *tmcf,
1535     u_char *start, u_char *end)
1536 {
1537     u_char                      *p;
1538     size_t                      size;
1539     nxt_mp_t                    *mp, *app_mp;
1540     uint32_t                    next, next_target;
1541     nxt_int_t                   ret;
1542     nxt_str_t                   name, target;
1543     nxt_app_t                   *app, *prev;
1544     nxt_str_t                   *t, *s, *targets;
1545     nxt_uint_t                  n, i;
1546     nxt_port_t                  *port;
1547     nxt_router_t                *router;
1548     nxt_app_joint_t             *app_joint;
1549 #if (NXT_TLS)
1550     nxt_tls_init_t              *tls_init;
1551     nxt_conf_value_t            *certificate;
1552 #endif
1553     nxt_conf_value_t            *root, *conf, *http, *value, *websocket;
1554     nxt_conf_value_t            *applications, *application;
1555     nxt_conf_value_t            *listeners, *listener;
1556     nxt_socket_conf_t           *skcf;
1557     nxt_router_conf_t           *rtcf;
1558     nxt_http_routes_t           *routes;
1559     nxt_event_engine_t          *engine;
1560     nxt_app_lang_module_t       *lang;
1561     nxt_router_app_conf_t       apcf;
1562     nxt_router_listener_conf_t  lscf;
1563 
1564     static nxt_str_t  http_path = nxt_string("/settings/http");
1565     static nxt_str_t  applications_path = nxt_string("/applications");
1566     static nxt_str_t  listeners_path = nxt_string("/listeners");
1567     static nxt_str_t  routes_path = nxt_string("/routes");
1568     static nxt_str_t  access_log_path = nxt_string("/access_log");
1569 #if (NXT_TLS)
1570     static nxt_str_t  certificate_path = nxt_string("/tls/certificate");
1571     static nxt_str_t  conf_commands_path = nxt_string("/tls/conf_commands");
1572     static nxt_str_t  conf_cache_path = nxt_string("/tls/session/cache_size");
1573     static nxt_str_t  conf_timeout_path = nxt_string("/tls/session/timeout");
1574     static nxt_str_t  conf_tickets = nxt_string("/tls/session/tickets");
1575 #endif
1576     static nxt_str_t  static_path = nxt_string("/settings/http/static");
1577     static nxt_str_t  websocket_path = nxt_string("/settings/http/websocket");
1578     static nxt_str_t  forwarded_path = nxt_string("/forwarded");
1579     static nxt_str_t  client_ip_path = nxt_string("/client_ip");
1580 
1581     root = nxt_conf_json_parse(tmcf->mem_pool, start, end, NULL);
1582     if (root == NULL) {
1583         nxt_alert(task, "configuration parsing error");
1584         return NXT_ERROR;
1585     }
1586 
1587     rtcf = tmcf->router_conf;
1588     mp = rtcf->mem_pool;
1589 
1590     ret = nxt_conf_map_object(mp, root, nxt_router_conf,
1591                               nxt_nitems(nxt_router_conf), rtcf);
1592     if (ret != NXT_OK) {
1593         nxt_alert(task, "root map error");
1594         return NXT_ERROR;
1595     }
1596 
1597     if (rtcf->threads == 0) {
1598         rtcf->threads = nxt_ncpu;
1599     }
1600 
1601     conf = nxt_conf_get_path(root, &static_path);
1602 
1603     ret = nxt_router_conf_process_static(task, rtcf, conf);
1604     if (nxt_slow_path(ret != NXT_OK)) {
1605         return NXT_ERROR;
1606     }
1607 
1608     router = rtcf->router;
1609 
1610     applications = nxt_conf_get_path(root, &applications_path);
1611 
1612     if (applications != NULL) {
1613         next = 0;
1614 
1615         for ( ;; ) {
1616             application = nxt_conf_next_object_member(applications,
1617                                                       &name, &next);
1618             if (application == NULL) {
1619                 break;
1620             }
1621 
1622             nxt_debug(task, "application \"%V\"", &name);
1623 
1624             size = nxt_conf_json_length(application, NULL);
1625 
1626             app_mp = nxt_mp_create(4096, 128, 1024, 64);
1627             if (nxt_slow_path(app_mp == NULL)) {
1628                 goto fail;
1629             }
1630 
1631             app = nxt_mp_get(app_mp, sizeof(nxt_app_t) + name.length + size);
1632             if (app == NULL) {
1633                 goto app_fail;
1634             }
1635 
1636             nxt_memzero(app, sizeof(nxt_app_t));
1637 
1638             app->mem_pool = app_mp;
1639 
1640             app->name.start = nxt_pointer_to(app, sizeof(nxt_app_t));
1641             app->conf.start = nxt_pointer_to(app, sizeof(nxt_app_t)
1642                                                   + name.length);
1643 
1644             p = nxt_conf_json_print(app->conf.start, application, NULL);
1645             app->conf.length = p - app->conf.start;
1646 
1647             nxt_assert(app->conf.length <= size);
1648 
1649             nxt_debug(task, "application conf \"%V\"", &app->conf);
1650 
1651             prev = nxt_router_app_find(&router->apps, &name);
1652 
1653             if (prev != NULL && nxt_strstr_eq(&app->conf, &prev->conf)) {
1654                 nxt_mp_destroy(app_mp);
1655 
1656                 nxt_queue_remove(&prev->link);
1657                 nxt_queue_insert_tail(&tmcf->previous, &prev->link);
1658 
1659                 ret = nxt_router_apps_hash_add(rtcf, prev);
1660                 if (nxt_slow_path(ret != NXT_OK)) {
1661                     goto fail;
1662                 }
1663 
1664                 continue;
1665             }
1666 
1667             apcf.processes = 1;
1668             apcf.max_processes = 1;
1669             apcf.spare_processes = 0;
1670             apcf.timeout = 0;
1671             apcf.idle_timeout = 15000;
1672             apcf.limits_value = NULL;
1673             apcf.processes_value = NULL;
1674             apcf.targets_value = NULL;
1675 
1676             app_joint = nxt_malloc(sizeof(nxt_app_joint_t));
1677             if (nxt_slow_path(app_joint == NULL)) {
1678                 goto app_fail;
1679             }
1680 
1681             nxt_memzero(app_joint, sizeof(nxt_app_joint_t));
1682 
1683             ret = nxt_conf_map_object(mp, application, nxt_router_app_conf,
1684                                       nxt_nitems(nxt_router_app_conf), &apcf);
1685             if (ret != NXT_OK) {
1686                 nxt_alert(task, "application map error");
1687                 goto app_fail;
1688             }
1689 
1690             if (apcf.limits_value != NULL) {
1691 
1692                 if (nxt_conf_type(apcf.limits_value) != NXT_CONF_OBJECT) {
1693                     nxt_alert(task, "application limits is not object");
1694                     goto app_fail;
1695                 }
1696 
1697                 ret = nxt_conf_map_object(mp, apcf.limits_value,
1698                                         nxt_router_app_limits_conf,
1699                                         nxt_nitems(nxt_router_app_limits_conf),
1700                                         &apcf);
1701                 if (ret != NXT_OK) {
1702                     nxt_alert(task, "application limits map error");
1703                     goto app_fail;
1704                 }
1705             }
1706 
1707             if (apcf.processes_value != NULL
1708                 && nxt_conf_type(apcf.processes_value) == NXT_CONF_OBJECT)
1709             {
1710                 ret = nxt_conf_map_object(mp, apcf.processes_value,
1711                                      nxt_router_app_processes_conf,
1712                                      nxt_nitems(nxt_router_app_processes_conf),
1713                                      &apcf);
1714                 if (ret != NXT_OK) {
1715                     nxt_alert(task, "application processes map error");
1716                     goto app_fail;
1717                 }
1718 
1719             } else {
1720                 apcf.max_processes = apcf.processes;
1721                 apcf.spare_processes = apcf.processes;
1722             }
1723 
1724             if (apcf.targets_value != NULL) {
1725                 n = nxt_conf_object_members_count(apcf.targets_value);
1726 
1727                 targets = nxt_mp_get(app_mp, sizeof(nxt_str_t) * n);
1728                 if (nxt_slow_path(targets == NULL)) {
1729                     goto app_fail;
1730                 }
1731 
1732                 next_target = 0;
1733 
1734                 for (i = 0; i < n; i++) {
1735                     (void) nxt_conf_next_object_member(apcf.targets_value,
1736                                                        &target, &next_target);
1737 
1738                     s = nxt_str_dup(app_mp, &targets[i], &target);
1739                     if (nxt_slow_path(s == NULL)) {
1740                         goto app_fail;
1741                     }
1742                 }
1743 
1744             } else {
1745                 targets = NULL;
1746             }
1747 
1748             nxt_debug(task, "application type: %V", &apcf.type);
1749             nxt_debug(task, "application processes: %D", apcf.processes);
1750             nxt_debug(task, "application request timeout: %M", apcf.timeout);
1751 
1752             lang = nxt_app_lang_module(task->thread->runtime, &apcf.type);
1753 
1754             if (lang == NULL) {
1755                 nxt_alert(task, "unknown application type: \"%V\"", &apcf.type);
1756                 goto app_fail;
1757             }
1758 
1759             nxt_debug(task, "application language module: \"%s\"", lang->file);
1760 
1761             ret = nxt_thread_mutex_create(&app->mutex);
1762             if (ret != NXT_OK) {
1763                 goto app_fail;
1764             }
1765 
1766             nxt_queue_init(&app->ports);
1767             nxt_queue_init(&app->spare_ports);
1768             nxt_queue_init(&app->idle_ports);
1769             nxt_queue_init(&app->ack_waiting_req);
1770 
1771             app->name.length = name.length;
1772             nxt_memcpy(app->name.start, name.start, name.length);
1773 
1774             app->type = lang->type;
1775             app->max_processes = apcf.max_processes;
1776             app->spare_processes = apcf.spare_processes;
1777             app->max_pending_processes = apcf.spare_processes
1778                                          ? apcf.spare_processes : 1;
1779             app->timeout = apcf.timeout;
1780             app->idle_timeout = apcf.idle_timeout;
1781 
1782             app->targets = targets;
1783 
1784             engine = task->thread->engine;
1785 
1786             app->engine = engine;
1787 
1788             app->adjust_idle_work.handler = nxt_router_adjust_idle_timer;
1789             app->adjust_idle_work.task = &engine->task;
1790             app->adjust_idle_work.obj = app;
1791 
1792             nxt_queue_insert_tail(&tmcf->apps, &app->link);
1793 
1794             ret = nxt_router_apps_hash_add(rtcf, app);
1795             if (nxt_slow_path(ret != NXT_OK)) {
1796                 goto app_fail;
1797             }
1798 
1799             nxt_router_app_use(task, app, 1);
1800 
1801             app->joint = app_joint;
1802 
1803             app_joint->use_count = 1;
1804             app_joint->app = app;
1805 
1806             app_joint->idle_timer.bias = NXT_TIMER_DEFAULT_BIAS;
1807             app_joint->idle_timer.work_queue = &engine->fast_work_queue;
1808             app_joint->idle_timer.handler = nxt_router_app_idle_timeout;
1809             app_joint->idle_timer.task = &engine->task;
1810             app_joint->idle_timer.log = app_joint->idle_timer.task->log;
1811 
1812             app_joint->free_app_work.handler = nxt_router_free_app;
1813             app_joint->free_app_work.task = &engine->task;
1814             app_joint->free_app_work.obj = app_joint;
1815 
1816             port = nxt_port_new(task, NXT_SHARED_PORT_ID, nxt_pid,
1817                                 NXT_PROCESS_APP);
1818             if (nxt_slow_path(port == NULL)) {
1819                 return NXT_ERROR;
1820             }
1821 
1822             ret = nxt_port_socket_init(task, port, 0);
1823             if (nxt_slow_path(ret != NXT_OK)) {
1824                 nxt_port_use(task, port, -1);
1825                 return NXT_ERROR;
1826             }
1827 
1828             ret = nxt_router_app_queue_init(task, port);
1829             if (nxt_slow_path(ret != NXT_OK)) {
1830                 nxt_port_write_close(port);
1831                 nxt_port_read_close(port);
1832                 nxt_port_use(task, port, -1);
1833                 return NXT_ERROR;
1834             }
1835 
1836             nxt_port_write_enable(task, port);
1837             port->app = app;
1838 
1839             app->shared_port = port;
1840 
1841             nxt_thread_mutex_create(&app->outgoing.mutex);
1842         }
1843     }
1844 
1845     conf = nxt_conf_get_path(root, &routes_path);
1846     if (nxt_fast_path(conf != NULL)) {
1847         routes = nxt_http_routes_create(task, tmcf, conf);
1848         if (nxt_slow_path(routes == NULL)) {
1849             return NXT_ERROR;
1850         }
1851 
1852         rtcf->routes = routes;
1853     }
1854 
1855     ret = nxt_upstreams_create(task, tmcf, root);
1856     if (nxt_slow_path(ret != NXT_OK)) {
1857         return ret;
1858     }
1859 
1860     http = nxt_conf_get_path(root, &http_path);
1861 #if 0
1862     if (http == NULL) {
1863         nxt_alert(task, "no \"http\" block");
1864         return NXT_ERROR;
1865     }
1866 #endif
1867 
1868     websocket = nxt_conf_get_path(root, &websocket_path);
1869 
1870     listeners = nxt_conf_get_path(root, &listeners_path);
1871 
1872     if (listeners != NULL) {
1873         next = 0;
1874 
1875         for ( ;; ) {
1876             listener = nxt_conf_next_object_member(listeners, &name, &next);
1877             if (listener == NULL) {
1878                 break;
1879             }
1880 
1881             skcf = nxt_router_socket_conf(task, tmcf, &name);
1882             if (skcf == NULL) {
1883                 goto fail;
1884             }
1885 
1886             nxt_memzero(&lscf, sizeof(lscf));
1887 
1888             ret = nxt_conf_map_object(mp, listener, nxt_router_listener_conf,
1889                                       nxt_nitems(nxt_router_listener_conf),
1890                                       &lscf);
1891             if (ret != NXT_OK) {
1892                 nxt_alert(task, "listener map error");
1893                 goto fail;
1894             }
1895 
1896             nxt_debug(task, "application: %V", &lscf.application);
1897 
1898             // STUB, default values if http block is not defined.
1899             skcf->header_buffer_size = 2048;
1900             skcf->large_header_buffer_size = 8192;
1901             skcf->large_header_buffers = 4;
1902             skcf->discard_unsafe_fields = 1;
1903             skcf->body_buffer_size = 16 * 1024;
1904             skcf->max_body_size = 8 * 1024 * 1024;
1905             skcf->proxy_header_buffer_size = 64 * 1024;
1906             skcf->proxy_buffer_size = 4096;
1907             skcf->proxy_buffers = 256;
1908             skcf->idle_timeout = 180 * 1000;
1909             skcf->header_read_timeout = 30 * 1000;
1910             skcf->body_read_timeout = 30 * 1000;
1911             skcf->send_timeout = 30 * 1000;
1912             skcf->proxy_timeout = 60 * 1000;
1913             skcf->proxy_send_timeout = 30 * 1000;
1914             skcf->proxy_read_timeout = 30 * 1000;
1915 
1916             skcf->websocket_conf.max_frame_size = 1024 * 1024;
1917             skcf->websocket_conf.read_timeout = 60 * 1000;
1918             skcf->websocket_conf.keepalive_interval = 30 * 1000;
1919 
1920             nxt_str_null(&skcf->body_temp_path);
1921 
1922             if (http != NULL) {
1923                 ret = nxt_conf_map_object(mp, http, nxt_router_http_conf,
1924                                           nxt_nitems(nxt_router_http_conf),
1925                                           skcf);
1926                 if (ret != NXT_OK) {
1927                     nxt_alert(task, "http map error");
1928                     goto fail;
1929                 }
1930             }
1931 
1932             if (websocket != NULL) {
1933                 ret = nxt_conf_map_object(mp, websocket,
1934                                           nxt_router_websocket_conf,
1935                                           nxt_nitems(nxt_router_websocket_conf),
1936                                           &skcf->websocket_conf);
1937                 if (ret != NXT_OK) {
1938                     nxt_alert(task, "websocket map error");
1939                     goto fail;
1940                 }
1941             }
1942 
1943             t = &skcf->body_temp_path;
1944 
1945             if (t->length == 0) {
1946                 t->start = (u_char *) task->thread->runtime->tmp;
1947                 t->length = nxt_strlen(t->start);
1948             }
1949 
1950             conf = nxt_conf_get_path(listener, &forwarded_path);
1951 
1952             if (conf != NULL) {
1953                 skcf->forwarded = nxt_router_conf_forward(task, mp, conf);
1954                 if (nxt_slow_path(skcf->forwarded == NULL)) {
1955                     return NXT_ERROR;
1956                 }
1957             }
1958 
1959             conf = nxt_conf_get_path(listener, &client_ip_path);
1960 
1961             if (conf != NULL) {
1962                 skcf->client_ip = nxt_router_conf_forward(task, mp, conf);
1963                 if (nxt_slow_path(skcf->client_ip == NULL)) {
1964                     return NXT_ERROR;
1965                 }
1966             }
1967 
1968 #if (NXT_TLS)
1969             certificate = nxt_conf_get_path(listener, &certificate_path);
1970 
1971             if (certificate != NULL) {
1972                 tls_init = nxt_mp_get(tmcf->mem_pool, sizeof(nxt_tls_init_t));
1973                 if (nxt_slow_path(tls_init == NULL)) {
1974                     return NXT_ERROR;
1975                 }
1976 
1977                 tls_init->cache_size = 0;
1978                 tls_init->timeout = 300;
1979 
1980                 value = nxt_conf_get_path(listener, &conf_cache_path);
1981                 if (value != NULL) {
1982                     tls_init->cache_size = nxt_conf_get_number(value);
1983                 }
1984 
1985                 value = nxt_conf_get_path(listener, &conf_timeout_path);
1986                 if (value != NULL) {
1987                     tls_init->timeout = nxt_conf_get_number(value);
1988                 }
1989 
1990                 tls_init->conf_cmds = nxt_conf_get_path(listener,
1991                                                         &conf_commands_path);
1992 
1993                 tls_init->tickets_conf = nxt_conf_get_path(listener,
1994                                                            &conf_tickets);
1995 
1996                 n = nxt_conf_array_elements_count_or_1(certificate);
1997 
1998                 for (i = 0; i < n; i++) {
1999                     value = nxt_conf_get_array_element_or_itself(certificate,
2000                                                                  i);
2001                     nxt_assert(value != NULL);
2002 
2003                     ret = nxt_router_conf_tls_insert(tmcf, value, skcf,
2004                                                      tls_init, i == 0);
2005                     if (nxt_slow_path(ret != NXT_OK)) {
2006                         goto fail;
2007                     }
2008                 }
2009             }
2010 #endif
2011 
2012             skcf->listen->handler = nxt_http_conn_init;
2013             skcf->router_conf = rtcf;
2014             skcf->router_conf->count++;
2015 
2016             if (lscf.pass.length != 0) {
2017                 skcf->action = nxt_http_action_create(task, tmcf, &lscf.pass);
2018 
2019             /* COMPATIBILITY: listener application. */
2020             } else if (lscf.application.length > 0) {
2021                 skcf->action = nxt_http_pass_application(task, rtcf,
2022                                                          &lscf.application);
2023             }
2024 
2025             if (nxt_slow_path(skcf->action == NULL)) {
2026                 goto fail;
2027             }
2028         }
2029     }
2030 
2031     ret = nxt_http_routes_resolve(task, tmcf);
2032     if (nxt_slow_path(ret != NXT_OK)) {
2033         goto fail;
2034     }
2035 
2036     value = nxt_conf_get_path(root, &access_log_path);
2037 
2038     if (value != NULL) {
2039         ret = nxt_router_access_log_create(task, rtcf, value);
2040         if (nxt_slow_path(ret != NXT_OK)) {
2041             goto fail;
2042         }
2043     }
2044 
2045     nxt_queue_add(&deleting_sockets, &router->sockets);
2046     nxt_queue_init(&router->sockets);
2047 
2048     return NXT_OK;
2049 
2050 app_fail:
2051 
2052     nxt_mp_destroy(app_mp);
2053 
2054 fail:
2055 
2056     nxt_queue_each(app, &tmcf->apps, nxt_app_t, link) {
2057 
2058         nxt_queue_remove(&app->link);
2059         nxt_thread_mutex_destroy(&app->mutex);
2060         nxt_mp_destroy(app->mem_pool);
2061 
2062     } nxt_queue_loop;
2063 
2064     return NXT_ERROR;
2065 }
2066 
2067 
2068 #if (NXT_TLS)
2069 
2070 static nxt_int_t
nxt_router_conf_tls_insert(nxt_router_temp_conf_t * tmcf,nxt_conf_value_t * value,nxt_socket_conf_t * skcf,nxt_tls_init_t * tls_init,nxt_bool_t last)2071 nxt_router_conf_tls_insert(nxt_router_temp_conf_t *tmcf,
2072     nxt_conf_value_t *value, nxt_socket_conf_t *skcf,
2073     nxt_tls_init_t *tls_init, nxt_bool_t last)
2074 {
2075     nxt_router_tlssock_t  *tls;
2076 
2077     tls = nxt_mp_get(tmcf->mem_pool, sizeof(nxt_router_tlssock_t));
2078     if (nxt_slow_path(tls == NULL)) {
2079         return NXT_ERROR;
2080     }
2081 
2082     tls->tls_init = tls_init;
2083     tls->socket_conf = skcf;
2084     tls->temp_conf = tmcf;
2085     tls->last = last;
2086     nxt_conf_get_string(value, &tls->name);
2087 
2088     nxt_queue_insert_tail(&tmcf->tls, &tls->link);
2089 
2090     return NXT_OK;
2091 }
2092 
2093 #endif
2094 
2095 
2096 static nxt_int_t
nxt_router_conf_process_static(nxt_task_t * task,nxt_router_conf_t * rtcf,nxt_conf_value_t * conf)2097 nxt_router_conf_process_static(nxt_task_t *task, nxt_router_conf_t *rtcf,
2098     nxt_conf_value_t *conf)
2099 {
2100     uint32_t          next, i;
2101     nxt_mp_t          *mp;
2102     nxt_str_t         *type, exten, str;
2103     nxt_int_t         ret;
2104     nxt_uint_t        exts;
2105     nxt_conf_value_t  *mtypes_conf, *ext_conf, *value;
2106 
2107     static nxt_str_t  mtypes_path = nxt_string("/mime_types");
2108 
2109     mp = rtcf->mem_pool;
2110 
2111     ret = nxt_http_static_mtypes_init(mp, &rtcf->mtypes_hash);
2112     if (nxt_slow_path(ret != NXT_OK)) {
2113         return NXT_ERROR;
2114     }
2115 
2116     if (conf == NULL) {
2117         return NXT_OK;
2118     }
2119 
2120     mtypes_conf = nxt_conf_get_path(conf, &mtypes_path);
2121 
2122     if (mtypes_conf != NULL) {
2123         next = 0;
2124 
2125         for ( ;; ) {
2126             ext_conf = nxt_conf_next_object_member(mtypes_conf, &str, &next);
2127 
2128             if (ext_conf == NULL) {
2129                 break;
2130             }
2131 
2132             type = nxt_str_dup(mp, NULL, &str);
2133             if (nxt_slow_path(type == NULL)) {
2134                 return NXT_ERROR;
2135             }
2136 
2137             if (nxt_conf_type(ext_conf) == NXT_CONF_STRING) {
2138                 nxt_conf_get_string(ext_conf, &str);
2139 
2140                 if (nxt_slow_path(nxt_str_dup(mp, &exten, &str) == NULL)) {
2141                     return NXT_ERROR;
2142                 }
2143 
2144                 ret = nxt_http_static_mtypes_hash_add(mp, &rtcf->mtypes_hash,
2145                                                       &exten, type);
2146                 if (nxt_slow_path(ret != NXT_OK)) {
2147                     return NXT_ERROR;
2148                 }
2149 
2150                 continue;
2151             }
2152 
2153             exts = nxt_conf_array_elements_count(ext_conf);
2154 
2155             for (i = 0; i < exts; i++) {
2156                 value = nxt_conf_get_array_element(ext_conf, i);
2157 
2158                 nxt_conf_get_string(value, &str);
2159 
2160                 if (nxt_slow_path(nxt_str_dup(mp, &exten, &str) == NULL)) {
2161                     return NXT_ERROR;
2162                 }
2163 
2164                 ret = nxt_http_static_mtypes_hash_add(mp, &rtcf->mtypes_hash,
2165                                                       &exten, type);
2166                 if (nxt_slow_path(ret != NXT_OK)) {
2167                     return NXT_ERROR;
2168                 }
2169             }
2170         }
2171     }
2172 
2173     return NXT_OK;
2174 }
2175 
2176 
2177 static nxt_http_forward_t *
nxt_router_conf_forward(nxt_task_t * task,nxt_mp_t * mp,nxt_conf_value_t * conf)2178 nxt_router_conf_forward(nxt_task_t *task, nxt_mp_t *mp, nxt_conf_value_t *conf)
2179 {
2180     nxt_int_t                   ret;
2181     nxt_conf_value_t            *header_conf, *client_ip_conf, *protocol_conf;
2182     nxt_conf_value_t            *source_conf, *recursive_conf;
2183     nxt_http_forward_t          *forward;
2184     nxt_http_route_addr_rule_t  *source;
2185 
2186     static nxt_str_t  header_path = nxt_string("/header");
2187     static nxt_str_t  client_ip_path = nxt_string("/client_ip");
2188     static nxt_str_t  protocol_path = nxt_string("/protocol");
2189     static nxt_str_t  source_path = nxt_string("/source");
2190     static nxt_str_t  recursive_path = nxt_string("/recursive");
2191 
2192     header_conf = nxt_conf_get_path(conf, &header_path);
2193 
2194     if (header_conf != NULL) {
2195         client_ip_conf = nxt_conf_get_path(conf, &header_path);
2196         protocol_conf = NULL;
2197 
2198     } else {
2199         client_ip_conf = nxt_conf_get_path(conf, &client_ip_path);
2200         protocol_conf = nxt_conf_get_path(conf, &protocol_path);
2201     }
2202 
2203     source_conf = nxt_conf_get_path(conf, &source_path);
2204     recursive_conf = nxt_conf_get_path(conf, &recursive_path);
2205 
2206     if (source_conf == NULL
2207         || (protocol_conf == NULL && client_ip_conf == NULL))
2208     {
2209         return NULL;
2210     }
2211 
2212     forward = nxt_mp_zget(mp, sizeof(nxt_http_forward_t));
2213     if (nxt_slow_path(forward == NULL)) {
2214         return NULL;
2215     }
2216 
2217     source = nxt_http_route_addr_rule_create(task, mp, source_conf);
2218     if (nxt_slow_path(source == NULL)) {
2219         return NULL;
2220     }
2221 
2222     forward->source = source;
2223 
2224     if (recursive_conf != NULL) {
2225         forward->recursive = nxt_conf_get_boolean(recursive_conf);
2226     }
2227 
2228     if (client_ip_conf != NULL) {
2229         ret = nxt_router_conf_forward_header(mp, client_ip_conf,
2230                                              &forward->client_ip);
2231         if (nxt_slow_path(ret != NXT_OK)) {
2232             return NULL;
2233         }
2234     }
2235 
2236     if (protocol_conf != NULL) {
2237         ret = nxt_router_conf_forward_header(mp, protocol_conf,
2238                                              &forward->protocol);
2239         if (nxt_slow_path(ret != NXT_OK)) {
2240             return NULL;
2241         }
2242     }
2243 
2244     return forward;
2245 }
2246 
2247 
2248 static nxt_int_t
nxt_router_conf_forward_header(nxt_mp_t * mp,nxt_conf_value_t * conf,nxt_http_forward_header_t * fh)2249 nxt_router_conf_forward_header(nxt_mp_t *mp, nxt_conf_value_t *conf,
2250     nxt_http_forward_header_t *fh)
2251 {
2252     char       c;
2253     size_t     i;
2254     uint32_t   hash;
2255     nxt_str_t  header;
2256 
2257     nxt_conf_get_string(conf, &header);
2258 
2259     fh->header = nxt_str_dup(mp, NULL, &header);
2260     if (nxt_slow_path(fh->header == NULL)) {
2261         return NXT_ERROR;
2262     }
2263 
2264     hash = NXT_HTTP_FIELD_HASH_INIT;
2265 
2266     for (i = 0; i < fh->header->length; i++) {
2267         c = fh->header->start[i];
2268         hash = nxt_http_field_hash_char(hash, nxt_lowcase(c));
2269     }
2270 
2271     hash = nxt_http_field_hash_end(hash) & 0xFFFF;
2272 
2273     fh->header_hash = hash;
2274 
2275     return NXT_OK;
2276 }
2277 
2278 
2279 static nxt_app_t *
nxt_router_app_find(nxt_queue_t * queue,nxt_str_t * name)2280 nxt_router_app_find(nxt_queue_t *queue, nxt_str_t *name)
2281 {
2282     nxt_app_t  *app;
2283 
2284     nxt_queue_each(app, queue, nxt_app_t, link) {
2285 
2286         if (nxt_strstr_eq(name, &app->name)) {
2287             return app;
2288         }
2289 
2290     } nxt_queue_loop;
2291 
2292     return NULL;
2293 }
2294 
2295 
2296 static nxt_int_t
nxt_router_app_queue_init(nxt_task_t * task,nxt_port_t * port)2297 nxt_router_app_queue_init(nxt_task_t *task, nxt_port_t *port)
2298 {
2299     void       *mem;
2300     nxt_int_t  fd;
2301 
2302     fd = nxt_shm_open(task, sizeof(nxt_app_queue_t));
2303     if (nxt_slow_path(fd == -1)) {
2304         return NXT_ERROR;
2305     }
2306 
2307     mem = nxt_mem_mmap(NULL, sizeof(nxt_app_queue_t),
2308                        PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
2309     if (nxt_slow_path(mem == MAP_FAILED)) {
2310         nxt_fd_close(fd);
2311 
2312         return NXT_ERROR;
2313     }
2314 
2315     nxt_app_queue_init(mem);
2316 
2317     port->queue_fd = fd;
2318     port->queue = mem;
2319 
2320     return NXT_OK;
2321 }
2322 
2323 
2324 static nxt_int_t
nxt_router_port_queue_init(nxt_task_t * task,nxt_port_t * port)2325 nxt_router_port_queue_init(nxt_task_t *task, nxt_port_t *port)
2326 {
2327     void       *mem;
2328     nxt_int_t  fd;
2329 
2330     fd = nxt_shm_open(task, sizeof(nxt_port_queue_t));
2331     if (nxt_slow_path(fd == -1)) {
2332         return NXT_ERROR;
2333     }
2334 
2335     mem = nxt_mem_mmap(NULL, sizeof(nxt_port_queue_t),
2336                        PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
2337     if (nxt_slow_path(mem == MAP_FAILED)) {
2338         nxt_fd_close(fd);
2339 
2340         return NXT_ERROR;
2341     }
2342 
2343     nxt_port_queue_init(mem);
2344 
2345     port->queue_fd = fd;
2346     port->queue = mem;
2347 
2348     return NXT_OK;
2349 }
2350 
2351 
2352 static nxt_int_t
nxt_router_port_queue_map(nxt_task_t * task,nxt_port_t * port,nxt_fd_t fd)2353 nxt_router_port_queue_map(nxt_task_t *task, nxt_port_t *port, nxt_fd_t fd)
2354 {
2355     void  *mem;
2356 
2357     nxt_assert(fd != -1);
2358 
2359     mem = nxt_mem_mmap(NULL, sizeof(nxt_port_queue_t),
2360                        PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
2361     if (nxt_slow_path(mem == MAP_FAILED)) {
2362 
2363         return NXT_ERROR;
2364     }
2365 
2366     port->queue = mem;
2367 
2368     return NXT_OK;
2369 }
2370 
2371 
2372 static const nxt_lvlhsh_proto_t  nxt_router_apps_hash_proto  nxt_aligned(64) = {
2373     NXT_LVLHSH_DEFAULT,
2374     nxt_router_apps_hash_test,
2375     nxt_mp_lvlhsh_alloc,
2376     nxt_mp_lvlhsh_free,
2377 };
2378 
2379 
2380 static nxt_int_t
nxt_router_apps_hash_test(nxt_lvlhsh_query_t * lhq,void * data)2381 nxt_router_apps_hash_test(nxt_lvlhsh_query_t *lhq, void *data)
2382 {
2383     nxt_app_t  *app;
2384 
2385     app = data;
2386 
2387     return nxt_strstr_eq(&lhq->key, &app->name) ? NXT_OK : NXT_DECLINED;
2388 }
2389 
2390 
2391 static nxt_int_t
nxt_router_apps_hash_add(nxt_router_conf_t * rtcf,nxt_app_t * app)2392 nxt_router_apps_hash_add(nxt_router_conf_t *rtcf, nxt_app_t *app)
2393 {
2394     nxt_lvlhsh_query_t  lhq;
2395 
2396     lhq.key_hash = nxt_djb_hash(app->name.start, app->name.length);
2397     lhq.replace = 0;
2398     lhq.key = app->name;
2399     lhq.value = app;
2400     lhq.proto = &nxt_router_apps_hash_proto;
2401     lhq.pool = rtcf->mem_pool;
2402 
2403     switch (nxt_lvlhsh_insert(&rtcf->apps_hash, &lhq)) {
2404 
2405     case NXT_OK:
2406         return NXT_OK;
2407 
2408     case NXT_DECLINED:
2409         nxt_thread_log_alert("router app hash adding failed: "
2410                              "\"%V\" is already in hash", &lhq.key);
2411         /* Fall through. */
2412     default:
2413         return NXT_ERROR;
2414     }
2415 }
2416 
2417 
2418 static nxt_app_t *
nxt_router_apps_hash_get(nxt_router_conf_t * rtcf,nxt_str_t * name)2419 nxt_router_apps_hash_get(nxt_router_conf_t *rtcf, nxt_str_t *name)
2420 {
2421     nxt_lvlhsh_query_t  lhq;
2422 
2423     lhq.key_hash = nxt_djb_hash(name->start, name->length);
2424     lhq.key = *name;
2425     lhq.proto = &nxt_router_apps_hash_proto;
2426 
2427     if (nxt_lvlhsh_find(&rtcf->apps_hash, &lhq) != NXT_OK) {
2428         return NULL;
2429     }
2430 
2431     return lhq.value;
2432 }
2433 
2434 
2435 static void
nxt_router_apps_hash_use(nxt_task_t * task,nxt_router_conf_t * rtcf,int i)2436 nxt_router_apps_hash_use(nxt_task_t *task, nxt_router_conf_t *rtcf, int i)
2437 {
2438     nxt_app_t          *app;
2439     nxt_lvlhsh_each_t  lhe;
2440 
2441     nxt_lvlhsh_each_init(&lhe, &nxt_router_apps_hash_proto);
2442 
2443     for ( ;; ) {
2444         app = nxt_lvlhsh_each(&rtcf->apps_hash, &lhe);
2445 
2446         if (app == NULL) {
2447             break;
2448         }
2449 
2450         nxt_router_app_use(task, app, i);
2451     }
2452 }
2453 
2454 
2455 typedef struct {
2456     nxt_app_t  *app;
2457     nxt_int_t  target;
2458 } nxt_http_app_conf_t;
2459 
2460 
2461 nxt_int_t
nxt_router_application_init(nxt_router_conf_t * rtcf,nxt_str_t * name,nxt_str_t * target,nxt_http_action_t * action)2462 nxt_router_application_init(nxt_router_conf_t *rtcf, nxt_str_t *name,
2463     nxt_str_t *target, nxt_http_action_t *action)
2464 {
2465     nxt_app_t            *app;
2466     nxt_str_t            *targets;
2467     nxt_uint_t           i;
2468     nxt_http_app_conf_t  *conf;
2469 
2470     app = nxt_router_apps_hash_get(rtcf, name);
2471     if (app == NULL) {
2472         return NXT_DECLINED;
2473     }
2474 
2475     conf = nxt_mp_get(rtcf->mem_pool, sizeof(nxt_http_app_conf_t));
2476     if (nxt_slow_path(conf == NULL)) {
2477         return NXT_ERROR;
2478     }
2479 
2480     action->handler = nxt_http_application_handler;
2481     action->u.conf = conf;
2482 
2483     conf->app = app;
2484 
2485     if (target != NULL && target->length != 0) {
2486         targets = app->targets;
2487 
2488         for (i = 0; !nxt_strstr_eq(target, &targets[i]); i++);
2489 
2490         conf->target = i;
2491 
2492     } else {
2493         conf->target = 0;
2494     }
2495 
2496     return NXT_OK;
2497 }
2498 
2499 
2500 static nxt_socket_conf_t *
nxt_router_socket_conf(nxt_task_t * task,nxt_router_temp_conf_t * tmcf,nxt_str_t * name)2501 nxt_router_socket_conf(nxt_task_t *task, nxt_router_temp_conf_t *tmcf,
2502     nxt_str_t *name)
2503 {
2504     size_t               size;
2505     nxt_int_t            ret;
2506     nxt_bool_t           wildcard;
2507     nxt_sockaddr_t       *sa;
2508     nxt_socket_conf_t    *skcf;
2509     nxt_listen_socket_t  *ls;
2510 
2511     sa = nxt_sockaddr_parse(tmcf->mem_pool, name);
2512     if (nxt_slow_path(sa == NULL)) {
2513         nxt_alert(task, "invalid listener \"%V\"", name);
2514         return NULL;
2515     }
2516 
2517     sa->type = SOCK_STREAM;
2518 
2519     nxt_debug(task, "router listener: \"%*s\"",
2520               (size_t) sa->length, nxt_sockaddr_start(sa));
2521 
2522     skcf = nxt_mp_zget(tmcf->router_conf->mem_pool, sizeof(nxt_socket_conf_t));
2523     if (nxt_slow_path(skcf == NULL)) {
2524         return NULL;
2525     }
2526 
2527     size = nxt_sockaddr_size(sa);
2528 
2529     ret = nxt_router_listen_socket_find(tmcf, skcf, sa);
2530 
2531     if (ret != NXT_OK) {
2532 
2533         ls = nxt_zalloc(sizeof(nxt_listen_socket_t) + size);
2534         if (nxt_slow_path(ls == NULL)) {
2535             return NULL;
2536         }
2537 
2538         skcf->listen = ls;
2539 
2540         ls->sockaddr = nxt_pointer_to(ls, sizeof(nxt_listen_socket_t));
2541         nxt_memcpy(ls->sockaddr, sa, size);
2542 
2543         nxt_listen_socket_remote_size(ls);
2544 
2545         ls->socket = -1;
2546         ls->backlog = NXT_LISTEN_BACKLOG;
2547         ls->flags = NXT_NONBLOCK;
2548         ls->read_after_accept = 1;
2549     }
2550 
2551     switch (sa->u.sockaddr.sa_family) {
2552 #if (NXT_HAVE_UNIX_DOMAIN)
2553     case AF_UNIX:
2554         wildcard = 0;
2555         break;
2556 #endif
2557 #if (NXT_INET6)
2558     case AF_INET6:
2559         wildcard = IN6_IS_ADDR_UNSPECIFIED(&sa->u.sockaddr_in6.sin6_addr);
2560         break;
2561 #endif
2562     case AF_INET:
2563     default:
2564         wildcard = (sa->u.sockaddr_in.sin_addr.s_addr == INADDR_ANY);
2565         break;
2566     }
2567 
2568     if (!wildcard) {
2569         skcf->sockaddr = nxt_mp_zget(tmcf->router_conf->mem_pool, size);
2570         if (nxt_slow_path(skcf->sockaddr == NULL)) {
2571             return NULL;
2572         }
2573 
2574         nxt_memcpy(skcf->sockaddr, sa, size);
2575     }
2576 
2577     return skcf;
2578 }
2579 
2580 
2581 static nxt_int_t
nxt_router_listen_socket_find(nxt_router_temp_conf_t * tmcf,nxt_socket_conf_t * nskcf,nxt_sockaddr_t * sa)2582 nxt_router_listen_socket_find(nxt_router_temp_conf_t *tmcf,
2583     nxt_socket_conf_t *nskcf, nxt_sockaddr_t *sa)
2584 {
2585     nxt_router_t       *router;
2586     nxt_queue_link_t   *qlk;
2587     nxt_socket_conf_t  *skcf;
2588 
2589     router = tmcf->router_conf->router;
2590 
2591     for (qlk = nxt_queue_first(&router->sockets);
2592          qlk != nxt_queue_tail(&router->sockets);
2593          qlk = nxt_queue_next(qlk))
2594     {
2595         skcf = nxt_queue_link_data(qlk, nxt_socket_conf_t, link);
2596 
2597         if (nxt_sockaddr_cmp(skcf->listen->sockaddr, sa)) {
2598             nskcf->listen = skcf->listen;
2599 
2600             nxt_queue_remove(qlk);
2601             nxt_queue_insert_tail(&keeping_sockets, qlk);
2602 
2603             nxt_queue_insert_tail(&updating_sockets, &nskcf->link);
2604 
2605             return NXT_OK;
2606         }
2607     }
2608 
2609     nxt_queue_insert_tail(&pending_sockets, &nskcf->link);
2610 
2611     return NXT_DECLINED;
2612 }
2613 
2614 
2615 static void
nxt_router_listen_socket_rpc_create(nxt_task_t * task,nxt_router_temp_conf_t * tmcf,nxt_socket_conf_t * skcf)2616 nxt_router_listen_socket_rpc_create(nxt_task_t *task,
2617     nxt_router_temp_conf_t *tmcf, nxt_socket_conf_t *skcf)
2618 {
2619     size_t            size;
2620     uint32_t          stream;
2621     nxt_int_t         ret;
2622     nxt_buf_t         *b;
2623     nxt_port_t        *main_port, *router_port;
2624     nxt_runtime_t     *rt;
2625     nxt_socket_rpc_t  *rpc;
2626 
2627     rpc = nxt_mp_alloc(tmcf->mem_pool, sizeof(nxt_socket_rpc_t));
2628     if (rpc == NULL) {
2629         goto fail;
2630     }
2631 
2632     rpc->socket_conf = skcf;
2633     rpc->temp_conf = tmcf;
2634 
2635     size = nxt_sockaddr_size(skcf->listen->sockaddr);
2636 
2637     b = nxt_buf_mem_alloc(tmcf->mem_pool, size, 0);
2638     if (b == NULL) {
2639         goto fail;
2640     }
2641 
2642     b->completion_handler = nxt_buf_dummy_completion;
2643 
2644     b->mem.free = nxt_cpymem(b->mem.free, skcf->listen->sockaddr, size);
2645 
2646     rt = task->thread->runtime;
2647     main_port = rt->port_by_type[NXT_PROCESS_MAIN];
2648     router_port = rt->port_by_type[NXT_PROCESS_ROUTER];
2649 
2650     stream = nxt_port_rpc_register_handler(task, router_port,
2651                                            nxt_router_listen_socket_ready,
2652                                            nxt_router_listen_socket_error,
2653                                            main_port->pid, rpc);
2654     if (nxt_slow_path(stream == 0)) {
2655         goto fail;
2656     }
2657 
2658     ret = nxt_port_socket_write(task, main_port, NXT_PORT_MSG_SOCKET, -1,
2659                                 stream, router_port->id, b);
2660 
2661     if (nxt_slow_path(ret != NXT_OK)) {
2662         nxt_port_rpc_cancel(task, router_port, stream);
2663         goto fail;
2664     }
2665 
2666     return;
2667 
2668 fail:
2669 
2670     nxt_router_conf_error(task, tmcf);
2671 }
2672 
2673 
2674 static void
nxt_router_listen_socket_ready(nxt_task_t * task,nxt_port_recv_msg_t * msg,void * data)2675 nxt_router_listen_socket_ready(nxt_task_t *task, nxt_port_recv_msg_t *msg,
2676     void *data)
2677 {
2678     nxt_int_t         ret;
2679     nxt_socket_t      s;
2680     nxt_socket_rpc_t  *rpc;
2681 
2682     rpc = data;
2683 
2684     s = msg->fd[0];
2685 
2686     ret = nxt_socket_nonblocking(task, s);
2687     if (nxt_slow_path(ret != NXT_OK)) {
2688         goto fail;
2689     }
2690 
2691     nxt_socket_defer_accept(task, s, rpc->socket_conf->listen->sockaddr);
2692 
2693     ret = nxt_listen_socket(task, s, NXT_LISTEN_BACKLOG);
2694     if (nxt_slow_path(ret != NXT_OK)) {
2695         goto fail;
2696     }
2697 
2698     rpc->socket_conf->listen->socket = s;
2699 
2700     nxt_work_queue_add(&task->thread->engine->fast_work_queue,
2701                        nxt_router_conf_apply, task, rpc->temp_conf, NULL);
2702 
2703     return;
2704 
2705 fail:
2706 
2707     nxt_socket_close(task, s);
2708 
2709     nxt_router_conf_error(task, rpc->temp_conf);
2710 }
2711 
2712 
2713 static void
nxt_router_listen_socket_error(nxt_task_t * task,nxt_port_recv_msg_t * msg,void * data)2714 nxt_router_listen_socket_error(nxt_task_t *task, nxt_port_recv_msg_t *msg,
2715     void *data)
2716 {
2717     nxt_socket_rpc_t        *rpc;
2718     nxt_router_temp_conf_t  *tmcf;
2719 
2720     rpc = data;
2721     tmcf = rpc->temp_conf;
2722 
2723 #if 0
2724     u_char                  *p;
2725     size_t                  size;
2726     uint8_t                 error;
2727     nxt_buf_t               *in, *out;
2728     nxt_sockaddr_t          *sa;
2729 
2730     static nxt_str_t  socket_errors[] = {
2731         nxt_string("ListenerSystem"),
2732         nxt_string("ListenerNoIPv6"),
2733         nxt_string("ListenerPort"),
2734         nxt_string("ListenerInUse"),
2735         nxt_string("ListenerNoAddress"),
2736         nxt_string("ListenerNoAccess"),
2737         nxt_string("ListenerPath"),
2738     };
2739 
2740     sa = rpc->socket_conf->listen->sockaddr;
2741 
2742     in = nxt_buf_chk_make_plain(tmcf->mem_pool, msg->buf, msg->size);
2743 
2744     if (nxt_slow_path(in == NULL)) {
2745         return;
2746     }
2747 
2748     p = in->mem.pos;
2749 
2750     error = *p++;
2751 
2752     size = nxt_length("listen socket error: ")
2753            + nxt_length("{listener: \"\", code:\"\", message: \"\"}")
2754            + sa->length + socket_errors[error].length + (in->mem.free - p);
2755 
2756     out = nxt_buf_mem_alloc(tmcf->mem_pool, size, 0);
2757     if (nxt_slow_path(out == NULL)) {
2758         return;
2759     }
2760 
2761     out->mem.free = nxt_sprintf(out->mem.free, out->mem.end,
2762                         "listen socket error: "
2763                         "{listener: \"%*s\", code:\"%V\", message: \"%*s\"}",
2764                         (size_t) sa->length, nxt_sockaddr_start(sa),
2765                         &socket_errors[error], in->mem.free - p, p);
2766 
2767     nxt_debug(task, "%*s", out->mem.free - out->mem.pos, out->mem.pos);
2768 #endif
2769 
2770     nxt_router_conf_error(task, tmcf);
2771 }
2772 
2773 
2774 #if (NXT_TLS)
2775 
2776 static void
nxt_router_tls_rpc_handler(nxt_task_t * task,nxt_port_recv_msg_t * msg,void * data)2777 nxt_router_tls_rpc_handler(nxt_task_t *task, nxt_port_recv_msg_t *msg,
2778     void *data)
2779 {
2780     nxt_mp_t                *mp;
2781     nxt_int_t               ret;
2782     nxt_tls_conf_t          *tlscf;
2783     nxt_router_tlssock_t    *tls;
2784     nxt_tls_bundle_conf_t   *bundle;
2785     nxt_router_temp_conf_t  *tmcf;
2786 
2787     nxt_debug(task, "tls rpc handler");
2788 
2789     tls = data;
2790     tmcf = tls->temp_conf;
2791 
2792     if (msg == NULL || msg->port_msg.type == _NXT_PORT_MSG_RPC_ERROR) {
2793         goto fail;
2794     }
2795 
2796     mp = tmcf->router_conf->mem_pool;
2797 
2798     if (tls->socket_conf->tls == NULL){
2799         tlscf = nxt_mp_zget(mp, sizeof(nxt_tls_conf_t));
2800         if (nxt_slow_path(tlscf == NULL)) {
2801             goto fail;
2802         }
2803 
2804         tlscf->no_wait_shutdown = 1;
2805         tls->socket_conf->tls = tlscf;
2806 
2807     } else {
2808         tlscf = tls->socket_conf->tls;
2809     }
2810 
2811     tls->tls_init->conf = tlscf;
2812 
2813     bundle = nxt_mp_get(mp, sizeof(nxt_tls_bundle_conf_t));
2814     if (nxt_slow_path(bundle == NULL)) {
2815         goto fail;
2816     }
2817 
2818     if (nxt_slow_path(nxt_str_dup(mp, &bundle->name, &tls->name) == NULL)) {
2819         goto fail;
2820     }
2821 
2822     bundle->chain_file = msg->fd[0];
2823     bundle->next = tlscf->bundle;
2824     tlscf->bundle = bundle;
2825 
2826     ret = task->thread->runtime->tls->server_init(task, mp, tls->tls_init,
2827                                                   tls->last);
2828     if (nxt_slow_path(ret != NXT_OK)) {
2829         goto fail;
2830     }
2831 
2832     nxt_work_queue_add(&task->thread->engine->fast_work_queue,
2833                        nxt_router_conf_apply, task, tmcf, NULL);
2834     return;
2835 
2836 fail:
2837 
2838     nxt_router_conf_error(task, tmcf);
2839 }
2840 
2841 #endif
2842 
2843 
2844 static void
nxt_router_app_rpc_create(nxt_task_t * task,nxt_router_temp_conf_t * tmcf,nxt_app_t * app)2845 nxt_router_app_rpc_create(nxt_task_t *task,
2846     nxt_router_temp_conf_t *tmcf, nxt_app_t *app)
2847 {
2848     size_t         size;
2849     uint32_t       stream;
2850     nxt_fd_t       port_fd, queue_fd;
2851     nxt_int_t      ret;
2852     nxt_buf_t      *b;
2853     nxt_port_t     *router_port, *dport;
2854     nxt_runtime_t  *rt;
2855     nxt_app_rpc_t  *rpc;
2856 
2857     rt = task->thread->runtime;
2858 
2859     dport = app->proto_port;
2860 
2861     if (dport == NULL) {
2862         nxt_debug(task, "app '%V' prototype prefork", &app->name);
2863 
2864         size = app->name.length + 1 + app->conf.length;
2865 
2866         b = nxt_buf_mem_alloc(tmcf->mem_pool, size, 0);
2867         if (nxt_slow_path(b == NULL)) {
2868             goto fail;
2869         }
2870 
2871         b->completion_handler = nxt_buf_dummy_completion;
2872 
2873         nxt_buf_cpystr(b, &app->name);
2874         *b->mem.free++ = '\0';
2875         nxt_buf_cpystr(b, &app->conf);
2876 
2877         dport = rt->port_by_type[NXT_PROCESS_MAIN];
2878 
2879         port_fd = app->shared_port->pair[0];
2880         queue_fd = app->shared_port->queue_fd;
2881 
2882     } else {
2883         nxt_debug(task, "app '%V' prefork", &app->name);
2884 
2885         b = NULL;
2886         port_fd = -1;
2887         queue_fd = -1;
2888     }
2889 
2890     router_port = rt->port_by_type[NXT_PROCESS_ROUTER];
2891 
2892     rpc = nxt_port_rpc_register_handler_ex(task, router_port,
2893                                            nxt_router_app_prefork_ready,
2894                                            nxt_router_app_prefork_error,
2895                                            sizeof(nxt_app_rpc_t));
2896     if (nxt_slow_path(rpc == NULL)) {
2897         goto fail;
2898     }
2899 
2900     rpc->app = app;
2901     rpc->temp_conf = tmcf;
2902     rpc->proto = (b != NULL);
2903 
2904     stream = nxt_port_rpc_ex_stream(rpc);
2905 
2906     ret = nxt_port_socket_write2(task, dport, NXT_PORT_MSG_START_PROCESS,
2907                                  port_fd, queue_fd, stream, router_port->id, b);
2908     if (nxt_slow_path(ret != NXT_OK)) {
2909         nxt_port_rpc_cancel(task, router_port, stream);
2910         goto fail;
2911     }
2912 
2913     if (b == NULL) {
2914         nxt_port_rpc_ex_set_peer(task, router_port, rpc, dport->pid);
2915 
2916         app->pending_processes++;
2917     }
2918 
2919     return;
2920 
2921 fail:
2922 
2923     nxt_router_conf_error(task, tmcf);
2924 }
2925 
2926 
2927 static void
nxt_router_app_prefork_ready(nxt_task_t * task,nxt_port_recv_msg_t * msg,void * data)2928 nxt_router_app_prefork_ready(nxt_task_t *task, nxt_port_recv_msg_t *msg,
2929     void *data)
2930 {
2931     nxt_app_t           *app;
2932     nxt_port_t          *port;
2933     nxt_app_rpc_t       *rpc;
2934     nxt_event_engine_t  *engine;
2935 
2936     rpc = data;
2937     app = rpc->app;
2938 
2939     port = msg->u.new_port;
2940 
2941     nxt_assert(port != NULL);
2942     nxt_assert(port->id == 0);
2943 
2944     if (rpc->proto) {
2945         nxt_assert(app->proto_port == NULL);
2946         nxt_assert(port->type == NXT_PROCESS_PROTOTYPE);
2947 
2948         nxt_port_inc_use(port);
2949 
2950         app->proto_port = port;
2951         port->app = app;
2952 
2953         nxt_router_app_rpc_create(task, rpc->temp_conf, app);
2954 
2955         return;
2956     }
2957 
2958     nxt_assert(port->type == NXT_PROCESS_APP);
2959 
2960     port->app = app;
2961     port->main_app_port = port;
2962 
2963     app->pending_processes--;
2964     app->processes++;
2965     app->idle_processes++;
2966 
2967     engine = task->thread->engine;
2968 
2969     nxt_queue_insert_tail(&app->ports, &port->app_link);
2970     nxt_queue_insert_tail(&app->spare_ports, &port->idle_link);
2971 
2972     nxt_debug(task, "app '%V' move new port %PI:%d to spare_ports",
2973               &app->name, port->pid, port->id);
2974 
2975     nxt_port_hash_add(&app->port_hash, port);
2976     app->port_hash_count++;
2977 
2978     port->idle_start = 0;
2979 
2980     nxt_port_inc_use(port);
2981 
2982     nxt_port_socket_write(task, port, NXT_PORT_MSG_PORT_ACK, -1, 0, 0, NULL);
2983 
2984     nxt_work_queue_add(&engine->fast_work_queue,
2985                        nxt_router_conf_apply, task, rpc->temp_conf, NULL);
2986 }
2987 
2988 
2989 static void
nxt_router_app_prefork_error(nxt_task_t * task,nxt_port_recv_msg_t * msg,void * data)2990 nxt_router_app_prefork_error(nxt_task_t *task, nxt_port_recv_msg_t *msg,
2991     void *data)
2992 {
2993     nxt_app_t               *app;
2994     nxt_app_rpc_t           *rpc;
2995     nxt_router_temp_conf_t  *tmcf;
2996 
2997     rpc = data;
2998     app = rpc->app;
2999     tmcf = rpc->temp_conf;
3000 
3001     if (rpc->proto) {
3002         nxt_log(task, NXT_LOG_WARN, "failed to start prototype \"%V\"",
3003                 &app->name);
3004 
3005     } else {
3006         nxt_log(task, NXT_LOG_WARN, "failed to start application \"%V\"",
3007                 &app->name);
3008 
3009         app->pending_processes--;
3010     }
3011 
3012     nxt_router_conf_error(task, tmcf);
3013 }
3014 
3015 
3016 static nxt_int_t
nxt_router_engines_create(nxt_task_t * task,nxt_router_t * router,nxt_router_temp_conf_t * tmcf,const nxt_event_interface_t * interface)3017 nxt_router_engines_create(nxt_task_t *task, nxt_router_t *router,
3018     nxt_router_temp_conf_t *tmcf, const nxt_event_interface_t *interface)
3019 {
3020     nxt_int_t                 ret;
3021     nxt_uint_t                n, threads;
3022     nxt_queue_link_t          *qlk;
3023     nxt_router_engine_conf_t  *recf;
3024 
3025     threads = tmcf->router_conf->threads;
3026 
3027     tmcf->engines = nxt_array_create(tmcf->mem_pool, threads,
3028                                      sizeof(nxt_router_engine_conf_t));
3029     if (nxt_slow_path(tmcf->engines == NULL)) {
3030         return NXT_ERROR;
3031     }
3032 
3033     n = 0;
3034 
3035     for (qlk = nxt_queue_first(&router->engines);
3036          qlk != nxt_queue_tail(&router->engines);
3037          qlk = nxt_queue_next(qlk))
3038     {
3039         recf = nxt_array_zero_add(tmcf->engines);
3040         if (nxt_slow_path(recf == NULL)) {
3041             return NXT_ERROR;
3042         }
3043 
3044         recf->engine = nxt_queue_link_data(qlk, nxt_event_engine_t, link0);
3045 
3046         if (n < threads) {
3047             recf->action = NXT_ROUTER_ENGINE_KEEP;
3048             ret = nxt_router_engine_conf_update(tmcf, recf);
3049 
3050         } else {
3051             recf->action = NXT_ROUTER_ENGINE_DELETE;
3052             ret = nxt_router_engine_conf_delete(tmcf, recf);
3053         }
3054 
3055         if (nxt_slow_path(ret != NXT_OK)) {
3056             return ret;
3057         }
3058 
3059         n++;
3060     }
3061 
3062     tmcf->new_threads = n;
3063 
3064     while (n < threads) {
3065         recf = nxt_array_zero_add(tmcf->engines);
3066         if (nxt_slow_path(recf == NULL)) {
3067             return NXT_ERROR;
3068         }
3069 
3070         recf->action = NXT_ROUTER_ENGINE_ADD;
3071 
3072         recf->engine = nxt_event_engine_create(task, interface, NULL, 0, 0);
3073         if (nxt_slow_path(recf->engine == NULL)) {
3074             return NXT_ERROR;
3075         }
3076 
3077         ret = nxt_router_engine_conf_create(tmcf, recf);
3078         if (nxt_slow_path(ret != NXT_OK)) {
3079             return ret;
3080         }
3081 
3082         n++;
3083     }
3084 
3085     return NXT_OK;
3086 }
3087 
3088 
3089 static nxt_int_t
nxt_router_engine_conf_create(nxt_router_temp_conf_t * tmcf,nxt_router_engine_conf_t * recf)3090 nxt_router_engine_conf_create(nxt_router_temp_conf_t *tmcf,
3091     nxt_router_engine_conf_t *recf)
3092 {
3093     nxt_int_t  ret;
3094 
3095     ret = nxt_router_engine_joints_create(tmcf, recf, &creating_sockets,
3096                                           nxt_router_listen_socket_create);
3097     if (nxt_slow_path(ret != NXT_OK)) {
3098         return ret;
3099     }
3100 
3101     ret = nxt_router_engine_joints_create(tmcf, recf, &updating_sockets,
3102                                           nxt_router_listen_socket_create);
3103     if (nxt_slow_path(ret != NXT_OK)) {
3104         return ret;
3105     }
3106 
3107     return ret;
3108 }
3109 
3110 
3111 static nxt_int_t
nxt_router_engine_conf_update(nxt_router_temp_conf_t * tmcf,nxt_router_engine_conf_t * recf)3112 nxt_router_engine_conf_update(nxt_router_temp_conf_t *tmcf,
3113     nxt_router_engine_conf_t *recf)
3114 {
3115     nxt_int_t  ret;
3116 
3117     ret = nxt_router_engine_joints_create(tmcf, recf, &creating_sockets,
3118                                           nxt_router_listen_socket_create);
3119     if (nxt_slow_path(ret != NXT_OK)) {
3120         return ret;
3121     }
3122 
3123     ret = nxt_router_engine_joints_create(tmcf, recf, &updating_sockets,
3124                                           nxt_router_listen_socket_update);
3125     if (nxt_slow_path(ret != NXT_OK)) {
3126         return ret;
3127     }
3128 
3129     ret = nxt_router_engine_joints_delete(tmcf, recf, &deleting_sockets);
3130     if (nxt_slow_path(ret != NXT_OK)) {
3131         return ret;
3132     }
3133 
3134     return ret;
3135 }
3136 
3137 
3138 static nxt_int_t
nxt_router_engine_conf_delete(nxt_router_temp_conf_t * tmcf,nxt_router_engine_conf_t * recf)3139 nxt_router_engine_conf_delete(nxt_router_temp_conf_t *tmcf,
3140     nxt_router_engine_conf_t *recf)
3141 {
3142     nxt_int_t  ret;
3143 
3144     ret = nxt_router_engine_quit(tmcf, recf);
3145     if (nxt_slow_path(ret != NXT_OK)) {
3146         return ret;
3147     }
3148 
3149     ret = nxt_router_engine_joints_delete(tmcf, recf, &updating_sockets);
3150     if (nxt_slow_path(ret != NXT_OK)) {
3151         return ret;
3152