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comparison src/core/ngx_connection.c @ 0:f0b350454894 NGINX_0_1_0

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nginx 0.1.0 *) The first public version.
author Igor Sysoev <http://sysoev.ru>
date Mon, 04 Oct 2004 00:00:00 +0400
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children cc9f381affaa
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-1:000000000000 0:f0b350454894
1
2 /*
3 * Copyright (C) Igor Sysoev
4 */
5
6
7 #include <ngx_config.h>
8 #include <ngx_core.h>
9 #include <ngx_event.h>
10
11
12 ngx_os_io_t ngx_io;
13
14
15 ngx_listening_t *ngx_listening_inet_stream_socket(ngx_conf_t *cf,
16 in_addr_t addr,
17 in_port_t port)
18 {
19 size_t len;
20 ngx_listening_t *ls;
21 struct sockaddr_in *addr_in;
22
23 if (!(ls = ngx_array_push(&cf->cycle->listening))) {
24 return NULL;
25 }
26
27 ngx_memzero(ls, sizeof(ngx_listening_t));
28
29 if (!(addr_in = ngx_pcalloc(cf->pool, sizeof(struct sockaddr_in)))) {
30 return NULL;
31 }
32
33 #if (HAVE_SIN_LEN)
34 addr_in->sin_len = sizeof(struct sockaddr_in);
35 #endif
36 addr_in->sin_family = AF_INET;
37 addr_in->sin_addr.s_addr = addr;
38 addr_in->sin_port = htons(port);
39
40 if (!(ls->addr_text.data = ngx_palloc(cf->pool, INET_ADDRSTRLEN + 6))) {
41 return NULL;
42 }
43
44 len = ngx_inet_ntop(AF_INET, &addr, ls->addr_text.data, INET_ADDRSTRLEN);
45 ls->addr_text.len = ngx_snprintf((char *) ls->addr_text.data + len,
46 6, ":%d", port);
47
48 ls->fd = (ngx_socket_t) -1;
49 ls->family = AF_INET;
50 ls->type = SOCK_STREAM;
51 ls->protocol = IPPROTO_IP;
52 #if (WIN32)
53 ls->flags = WSA_FLAG_OVERLAPPED;
54 #endif
55 ls->sockaddr = (struct sockaddr *) addr_in;
56 ls->socklen = sizeof(struct sockaddr_in);
57 ls->addr = offsetof(struct sockaddr_in, sin_addr);
58 ls->addr_text_max_len = INET_ADDRSTRLEN;
59
60 return ls;
61 }
62
63
64 ngx_int_t ngx_set_inherited_sockets(ngx_cycle_t *cycle)
65 {
66 ngx_uint_t i;
67 ngx_listening_t *ls;
68 struct sockaddr_in *addr_in;
69
70 ls = cycle->listening.elts;
71 for (i = 0; i < cycle->listening.nelts; i++) {
72
73 /* AF_INET only */
74
75 ls[i].sockaddr = ngx_palloc(cycle->pool, sizeof(struct sockaddr_in));
76 if (ls[i].sockaddr == NULL) {
77 return NGX_ERROR;
78 }
79
80 ls[i].socklen = sizeof(struct sockaddr_in);
81 if (getsockname(ls[i].fd, ls[i].sockaddr, &ls[i].socklen) == -1) {
82 ngx_log_error(NGX_LOG_CRIT, cycle->log, ngx_socket_errno,
83 "getsockname() of the inherited "
84 "socket #%d failed", ls[i].fd);
85 ls[i].ignore = 1;
86 continue;
87 }
88
89 addr_in = (struct sockaddr_in *) ls[i].sockaddr;
90
91 if (addr_in->sin_family != AF_INET) {
92 ngx_log_error(NGX_LOG_CRIT, cycle->log, ngx_socket_errno,
93 "the inherited socket #%d has "
94 "unsupported family", ls[i].fd);
95 ls[i].ignore = 1;
96 continue;
97 }
98 ls[i].addr_text_max_len = INET_ADDRSTRLEN;
99
100 ls[i].addr_text.data = ngx_palloc(cycle->pool, ls[i].addr_text_max_len);
101 if (ls[i].addr_text.data == NULL) {
102 return NGX_ERROR;
103 }
104
105 ls[i].family = addr_in->sin_family;
106 ls[i].addr_text.len = ngx_sock_ntop(ls[i].family, ls[i].sockaddr,
107 ls[i].addr_text.data,
108 ls[i].addr_text_max_len);
109 if (ls[i].addr_text.len == 0) {
110 return NGX_ERROR;
111 }
112 }
113
114 return NGX_OK;
115 }
116
117
118 ngx_int_t ngx_open_listening_sockets(ngx_cycle_t *cycle)
119 {
120 ngx_uint_t tries, failed, reuseaddr, i;
121 ngx_err_t err;
122 ngx_log_t *log;
123 ngx_socket_t s;
124 ngx_listening_t *ls;
125
126 reuseaddr = 1;
127 #if (NGX_SUPPRESS_WARN)
128 failed = 0;
129 #endif
130
131 log = cycle->log;
132
133 /* TODO: tries configurable */
134
135 for (tries = /* STUB */ 5; tries; tries--) {
136 failed = 0;
137
138 /* for each listening socket */
139
140 ls = cycle->listening.elts;
141 for (i = 0; i < cycle->listening.nelts; i++) {
142
143 if (ls[i].ignore) {
144 continue;
145 }
146
147 if (ls[i].fd != -1) {
148 continue;
149 }
150
151 if (ls[i].inherited) {
152
153 /* TODO: close on exit */
154 /* TODO: nonblocking */
155 /* TODO: deferred accept */
156
157 continue;
158 }
159
160 s = ngx_socket(ls[i].family, ls[i].type, ls[i].protocol,
161 ls[i].flags);
162
163 if (s == -1) {
164 ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
165 ngx_socket_n " %s failed", ls[i].addr_text.data);
166 return NGX_ERROR;
167 }
168
169 #if (WIN32)
170 /*
171 * Winsock assignes a socket number divisible by 4
172 * so to find a connection we divide a socket number by 4.
173 */
174
175 if (s % 4) {
176 ngx_log_error(NGX_LOG_EMERG, ls->log, 0,
177 ngx_socket_n " created socket %d", s);
178 return NGX_ERROR;
179 }
180 #endif
181
182 if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
183 (const void *) &reuseaddr, sizeof(int)) == -1) {
184 ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
185 "setsockopt(SO_REUSEADDR) %s failed",
186 ls[i].addr_text.data);
187 return NGX_ERROR;
188 }
189
190 /* TODO: close on exit */
191
192 if (!(ngx_event_flags & NGX_USE_AIO_EVENT)) {
193 if (ngx_nonblocking(s) == -1) {
194 ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
195 ngx_nonblocking_n " %s failed",
196 ls[i].addr_text.data);
197 return NGX_ERROR;
198 }
199 }
200
201 #if 0
202 if (ls[i].nonblocking) {
203 if (ngx_nonblocking(s) == -1) {
204 ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
205 ngx_nonblocking_n " %s failed",
206 ls[i].addr_text.data);
207 return NGX_ERROR;
208 }
209 }
210 #endif
211
212 if (bind(s, ls[i].sockaddr, ls[i].socklen) == -1) {
213 err = ngx_socket_errno;
214 ngx_log_error(NGX_LOG_EMERG, log, err,
215 "bind() to %s failed", ls[i].addr_text.data);
216
217 if (err != NGX_EADDRINUSE)
218 return NGX_ERROR;
219
220 if (ngx_close_socket(s) == -1)
221 ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
222 ngx_close_socket_n " %s failed",
223 ls[i].addr_text.data);
224
225 failed = 1;
226 continue;
227 }
228
229 if (listen(s, ls[i].backlog) == -1) {
230 ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
231 "listen() to %s failed", ls[i].addr_text.data);
232 return NGX_ERROR;
233 }
234
235 /* TODO: deferred accept */
236
237 ls[i].fd = s;
238 }
239
240 if (!failed)
241 break;
242
243 /* TODO: delay configurable */
244
245 ngx_log_error(NGX_LOG_NOTICE, log, 0,
246 "try again to bind() after 500ms");
247 ngx_msleep(500);
248 }
249
250 if (failed) {
251 ngx_log_error(NGX_LOG_EMERG, log, 0, "still can not bind()");
252 return NGX_ERROR;
253 }
254
255 return NGX_OK;
256 }
257
258
259 void ngx_close_listening_sockets(ngx_cycle_t *cycle)
260 {
261 ngx_uint_t i;
262 ngx_socket_t fd;
263 ngx_listening_t *ls;
264
265 if (ngx_event_flags & NGX_USE_IOCP_EVENT) {
266 return;
267 }
268
269 ngx_accept_mutex_held = 0;
270 ngx_accept_mutex = NULL;
271
272 ls = cycle->listening.elts;
273 for (i = 0; i < cycle->listening.nelts; i++) {
274 fd = ls[i].fd;
275
276 #if (WIN32)
277 /*
278 * Winsock assignes a socket number divisible by 4
279 * so to find a connection we divide a socket number by 4.
280 */
281
282 fd /= 4;
283 #endif
284
285 if (ngx_event_flags & NGX_USE_RTSIG_EVENT) {
286 if (cycle->connections[fd].read->active) {
287 ngx_del_conn(&cycle->connections[fd], NGX_CLOSE_EVENT);
288 }
289
290 } else {
291 if (cycle->read_events[fd].active) {
292 ngx_del_event(&cycle->read_events[fd],
293 NGX_READ_EVENT, NGX_CLOSE_EVENT);
294 }
295 }
296
297 if (ngx_close_socket(ls[i].fd) == -1) {
298 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_socket_errno,
299 ngx_close_socket_n " %s failed",
300 ls[i].addr_text.data);
301 }
302
303 cycle->connections[fd].fd = (ngx_socket_t) -1;
304 }
305 }
306
307
308 void ngx_close_connection(ngx_connection_t *c)
309 {
310 ngx_socket_t fd;
311
312 if (c->pool == NULL) {
313 ngx_log_error(NGX_LOG_ALERT, c->log, 0, "connection already closed");
314 return;
315 }
316
317 #if (NGX_OPENSSL)
318
319 if (c->ssl) {
320 if (ngx_ssl_shutdown(c) == NGX_AGAIN) {
321 c->read->event_handler = ngx_ssl_close_handler;
322 c->write->event_handler = ngx_ssl_close_handler;
323 return;
324 }
325 }
326
327 #endif
328
329 if (c->read->timer_set) {
330 ngx_del_timer(c->read);
331 }
332
333 if (c->write->timer_set) {
334 ngx_del_timer(c->write);
335 }
336
337 if (ngx_del_conn) {
338 ngx_del_conn(c, NGX_CLOSE_EVENT);
339
340 } else {
341 if (c->read->active || c->read->disabled) {
342 ngx_del_event(c->read, NGX_READ_EVENT, NGX_CLOSE_EVENT);
343 }
344
345 if (c->write->active || c->write->disabled) {
346 ngx_del_event(c->write, NGX_WRITE_EVENT, NGX_CLOSE_EVENT);
347 }
348 }
349
350 #if (NGX_THREADS)
351
352 /*
353 * we have to clean the connection information before the closing
354 * because another thread may reopen the same file descriptor
355 * before we clean the connection
356 */
357
358 if (ngx_mutex_lock(ngx_posted_events_mutex) == NGX_OK) {
359
360 if (c->read->prev) {
361 ngx_delete_posted_event(c->read);
362 }
363
364 if (c->write->prev) {
365 ngx_delete_posted_event(c->write);
366 }
367
368 c->read->closed = 1;
369 c->write->closed = 1;
370
371 if (c->single_connection) {
372 ngx_unlock(&c->lock);
373 c->read->locked = 0;
374 c->write->locked = 0;
375 }
376
377 ngx_mutex_unlock(ngx_posted_events_mutex);
378 }
379
380 #else
381
382 if (c->read->prev) {
383 ngx_delete_posted_event(c->read);
384 }
385
386 if (c->write->prev) {
387 ngx_delete_posted_event(c->write);
388 }
389
390 c->read->closed = 1;
391 c->write->closed = 1;
392
393 #endif
394
395 fd = c->fd;
396 c->fd = (ngx_socket_t) -1;
397 c->data = NULL;
398
399 ngx_destroy_pool(c->pool);
400
401 if (ngx_close_socket(fd) == -1) {
402
403 /* we use ngx_cycle->log because c->log was in c->pool */
404
405 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, ngx_socket_errno,
406 ngx_close_socket_n " failed");
407 }
408 }
409
410
411
412 ngx_int_t ngx_connection_error(ngx_connection_t *c, ngx_err_t err, char *text)
413 {
414 ngx_uint_t level;
415
416 if (err == NGX_ECONNRESET
417 && c->log_error == NGX_ERROR_IGNORE_ECONNRESET)
418 {
419 return 0;
420 }
421
422 if (err == NGX_ECONNRESET
423 #if !(WIN32)
424 || err == NGX_EPIPE
425 #endif
426 || err == NGX_ENOTCONN
427 || err == NGX_ECONNREFUSED
428 || err == NGX_EHOSTUNREACH)
429 {
430
431 switch (c->log_error) {
432
433 case NGX_ERROR_IGNORE_ECONNRESET:
434 case NGX_ERROR_INFO:
435 level = NGX_LOG_INFO;
436 break;
437
438 case NGX_ERROR_ERR:
439 level = NGX_LOG_ERR;
440 break;
441
442 default:
443 level = NGX_LOG_CRIT;
444 }
445
446 } else {
447 level = NGX_LOG_CRIT;
448 }
449
450 ngx_log_error(level, c->log, err, text);
451
452 return NGX_ERROR;
453 }