|
0
|
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
|
|
92
|
12 /* the buffer size is enough to hold "struct sockaddr_un" */
|
|
|
13 #define NGX_SOCKLEN 512
|
|
|
14
|
|
|
15
|
|
|
16 static void ngx_close_accepted_connection(ngx_connection_t *c);
|
|
0
|
17
|
|
|
18
|
|
42
|
19 void
|
|
|
20 ngx_event_accept(ngx_event_t *ev)
|
|
0
|
21 {
|
|
92
|
22 socklen_t sl;
|
|
32
|
23 ngx_err_t err;
|
|
|
24 ngx_log_t *log;
|
|
|
25 ngx_socket_t s;
|
|
|
26 ngx_event_t *rev, *wev;
|
|
92
|
27 ngx_listening_t *ls;
|
|
|
28 ngx_connection_t *c, *lc;
|
|
32
|
29 ngx_event_conf_t *ecf;
|
|
92
|
30 char sa[NGX_SOCKLEN];
|
|
0
|
31
|
|
|
32 ecf = ngx_event_get_conf(ngx_cycle->conf_ctx, ngx_event_core_module);
|
|
|
33
|
|
|
34 if (ngx_event_flags & NGX_USE_RTSIG_EVENT) {
|
|
|
35 ev->available = 1;
|
|
|
36
|
|
4
|
37 } else if (!(ngx_event_flags & NGX_USE_KQUEUE_EVENT)) {
|
|
0
|
38 ev->available = ecf->multi_accept;
|
|
|
39 }
|
|
|
40
|
|
92
|
41 lc = ev->data;
|
|
|
42 ls = lc->listening;
|
|
|
43 ev->ready = 0;
|
|
0
|
44
|
|
|
45 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
|
|
92
|
46 "accept on %V, ready: %d", &ls->addr_text, ev->available);
|
|
0
|
47
|
|
|
48 do {
|
|
92
|
49 sl = NGX_SOCKLEN;
|
|
0
|
50
|
|
92
|
51 s = accept(lc->fd, (struct sockaddr *) sa, &sl);
|
|
26
|
52
|
|
0
|
53 if (s == -1) {
|
|
|
54 err = ngx_socket_errno;
|
|
|
55
|
|
|
56 if (err == NGX_EAGAIN) {
|
|
|
57 return;
|
|
|
58 }
|
|
|
59
|
|
58
|
60 ngx_log_error((err == NGX_ECONNABORTED) ? NGX_LOG_CRIT:
|
|
|
61 NGX_LOG_ALERT,
|
|
92
|
62 ev->log, err, "accept() failed");
|
|
0
|
63
|
|
|
64 if (err == NGX_ECONNABORTED) {
|
|
4
|
65 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
|
|
0
|
66 ev->available--;
|
|
|
67 }
|
|
|
68
|
|
|
69 if (ev->available) {
|
|
|
70 continue;
|
|
|
71 }
|
|
|
72 }
|
|
|
73
|
|
|
74 return;
|
|
|
75 }
|
|
|
76
|
|
|
77 #if (NGX_STAT_STUB)
|
|
110
|
78 ngx_atomic_fetch_add(ngx_stat_accepted, 1);
|
|
|
79 ngx_atomic_fetch_add(ngx_stat_active, 1);
|
|
0
|
80 #endif
|
|
|
81
|
|
92
|
82 ngx_accept_disabled = NGX_ACCEPT_THRESHOLD
|
|
|
83 - ngx_cycle->free_connection_n;
|
|
|
84
|
|
|
85 c = ngx_get_connection(s, ev->log);
|
|
0
|
86
|
|
92
|
87 if (c == NULL) {
|
|
|
88 if (ngx_close_socket(s) == -1) {
|
|
|
89 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_socket_errno,
|
|
|
90 ngx_close_socket_n " failed");
|
|
|
91 }
|
|
0
|
92
|
|
92
|
93 return;
|
|
|
94 }
|
|
|
95
|
|
|
96 c->pool = ngx_create_pool(ls->pool_size, ev->log);
|
|
|
97 if (c->pool == NULL) {
|
|
|
98 ngx_close_accepted_connection(c);
|
|
|
99 return;
|
|
|
100 }
|
|
0
|
101
|
|
92
|
102 c->sockaddr = ngx_palloc(c->pool, sl);
|
|
|
103 if (c->sockaddr == NULL) {
|
|
|
104 ngx_close_accepted_connection(c);
|
|
|
105 return;
|
|
|
106 }
|
|
|
107
|
|
|
108 ngx_memcpy(c->sockaddr, sa, sl);
|
|
|
109
|
|
|
110 log = ngx_palloc(c->pool, sizeof(ngx_log_t));
|
|
|
111 if (log == NULL) {
|
|
|
112 ngx_close_accepted_connection(c);
|
|
0
|
113 return;
|
|
|
114 }
|
|
|
115
|
|
36
|
116 /* set a blocking mode for aio and non-blocking mode for others */
|
|
0
|
117
|
|
|
118 if (ngx_inherited_nonblocking) {
|
|
92
|
119 if (ngx_event_flags & NGX_USE_AIO_EVENT) {
|
|
0
|
120 if (ngx_blocking(s) == -1) {
|
|
92
|
121 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_socket_errno,
|
|
0
|
122 ngx_blocking_n " failed");
|
|
92
|
123 ngx_close_accepted_connection(c);
|
|
0
|
124 return;
|
|
|
125 }
|
|
|
126 }
|
|
|
127
|
|
|
128 } else {
|
|
|
129 if (!(ngx_event_flags & (NGX_USE_AIO_EVENT|NGX_USE_RTSIG_EVENT))) {
|
|
|
130 if (ngx_nonblocking(s) == -1) {
|
|
92
|
131 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_socket_errno,
|
|
0
|
132 ngx_nonblocking_n " failed");
|
|
92
|
133 ngx_close_accepted_connection(c);
|
|
0
|
134 return;
|
|
|
135 }
|
|
|
136 }
|
|
|
137 }
|
|
|
138
|
|
92
|
139 *log = ls->log;
|
|
|
140
|
|
|
141 c->recv = ngx_recv;
|
|
|
142 c->send = ngx_send;
|
|
|
143 c->send_chain = ngx_send_chain;
|
|
0
|
144
|
|
92
|
145 c->log = log;
|
|
|
146 c->pool->log = log;
|
|
0
|
147
|
|
92
|
148 c->listening = ls;
|
|
|
149 c->socklen = sl;
|
|
|
150
|
|
|
151 c->unexpected_eof = 1;
|
|
|
152
|
|
|
153 c->ctx = lc->ctx;
|
|
|
154 c->servers = lc->servers;
|
|
0
|
155
|
|
110
|
156 rev = c->read;
|
|
|
157 wev = c->write;
|
|
0
|
158
|
|
|
159 wev->ready = 1;
|
|
|
160
|
|
|
161 if (ngx_event_flags & (NGX_USE_AIO_EVENT|NGX_USE_RTSIG_EVENT)) {
|
|
42
|
162 /* rtsig, aio, iocp */
|
|
0
|
163 rev->ready = 1;
|
|
|
164 }
|
|
|
165
|
|
|
166 if (ev->deferred_accept) {
|
|
|
167 rev->ready = 1;
|
|
72
|
168 #if (NGX_HAVE_KQUEUE)
|
|
|
169 rev->available = 1;
|
|
|
170 #endif
|
|
0
|
171 }
|
|
|
172
|
|
|
173 rev->log = log;
|
|
|
174 wev->log = log;
|
|
|
175
|
|
|
176 /*
|
|
110
|
177 * TODO: MT: - ngx_atomic_fetch_add()
|
|
0
|
178 * or protection by critical section or light mutex
|
|
|
179 *
|
|
|
180 * TODO: MP: - allocated in a shared memory
|
|
110
|
181 * - ngx_atomic_fetch_add()
|
|
0
|
182 * or protection by critical section or light mutex
|
|
|
183 */
|
|
|
184
|
|
110
|
185 c->number = ngx_atomic_fetch_add(ngx_connection_counter, 1);
|
|
0
|
186
|
|
44
|
187 #if (NGX_STAT_STUB)
|
|
110
|
188 ngx_atomic_fetch_add(ngx_stat_handled, 1);
|
|
44
|
189 #endif
|
|
|
190
|
|
0
|
191 #if (NGX_THREADS)
|
|
|
192 rev->lock = &c->lock;
|
|
|
193 wev->lock = &c->lock;
|
|
|
194 rev->own_lock = &c->lock;
|
|
|
195 wev->own_lock = &c->lock;
|
|
|
196 #endif
|
|
|
197
|
|
92
|
198 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, log, 0,
|
|
0
|
199 "accept: fd:%d c:%d", s, c->number);
|
|
|
200
|
|
92
|
201 if (ls->addr_ntop) {
|
|
|
202 c->addr_text.data = ngx_palloc(c->pool, ls->addr_text_max_len);
|
|
0
|
203 if (c->addr_text.data == NULL) {
|
|
92
|
204 ngx_close_accepted_connection(c);
|
|
0
|
205 return;
|
|
|
206 }
|
|
|
207
|
|
92
|
208 c->addr_text.len = ngx_sock_ntop(ls->family, c->sockaddr,
|
|
0
|
209 c->addr_text.data,
|
|
92
|
210 ls->addr_text_max_len);
|
|
0
|
211 if (c->addr_text.len == 0) {
|
|
92
|
212 ngx_close_accepted_connection(c);
|
|
0
|
213 return;
|
|
|
214 }
|
|
|
215 }
|
|
|
216
|
|
|
217 #if (NGX_DEBUG)
|
|
|
218 {
|
|
|
219
|
|
|
220 uint32_t *addr;
|
|
|
221 in_addr_t i;
|
|
28
|
222 struct sockaddr_in *sin;
|
|
0
|
223
|
|
28
|
224 sin = (struct sockaddr_in *) sa;
|
|
0
|
225 addr = ecf->debug_connection.elts;
|
|
|
226 for (i = 0; i < ecf->debug_connection.nelts; i++) {
|
|
28
|
227 if (addr[i] == sin->sin_addr.s_addr) {
|
|
0
|
228 log->log_level = NGX_LOG_DEBUG_CONNECTION|NGX_LOG_DEBUG_ALL;
|
|
|
229 break;
|
|
|
230 }
|
|
|
231 }
|
|
|
232
|
|
|
233 }
|
|
|
234 #endif
|
|
|
235
|
|
|
236 if (ngx_add_conn && (ngx_event_flags & NGX_USE_EPOLL_EVENT) == 0) {
|
|
|
237 if (ngx_add_conn(c) == NGX_ERROR) {
|
|
92
|
238 ngx_close_accepted_connection(c);
|
|
0
|
239 return;
|
|
|
240 }
|
|
|
241 }
|
|
|
242
|
|
|
243 log->data = NULL;
|
|
|
244 log->handler = NULL;
|
|
|
245
|
|
92
|
246 ls->handler(c);
|
|
0
|
247
|
|
4
|
248 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
|
|
0
|
249 ev->available--;
|
|
|
250 }
|
|
|
251
|
|
|
252 } while (ev->available);
|
|
|
253 }
|
|
|
254
|
|
|
255
|
|
42
|
256 ngx_int_t
|
|
|
257 ngx_trylock_accept_mutex(ngx_cycle_t *cycle)
|
|
0
|
258 {
|
|
|
259 if (*ngx_accept_mutex == 0
|
|
|
260 && ngx_atomic_cmp_set(ngx_accept_mutex, 0, ngx_pid))
|
|
|
261 {
|
|
|
262 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
|
263 "accept mutex locked");
|
|
|
264
|
|
|
265 if (!ngx_accept_mutex_held) {
|
|
|
266 if (ngx_enable_accept_events(cycle) == NGX_ERROR) {
|
|
|
267 *ngx_accept_mutex = 0;
|
|
|
268 return NGX_ERROR;
|
|
|
269 }
|
|
|
270
|
|
|
271 ngx_accept_mutex_held = 1;
|
|
|
272 }
|
|
|
273
|
|
|
274 return NGX_OK;
|
|
|
275 }
|
|
|
276
|
|
|
277 if (ngx_accept_mutex_held) {
|
|
|
278 if (ngx_disable_accept_events(cycle) == NGX_ERROR) {
|
|
|
279 return NGX_ERROR;
|
|
|
280 }
|
|
|
281
|
|
|
282 ngx_accept_mutex_held = 0;
|
|
|
283 }
|
|
|
284
|
|
|
285 return NGX_OK;
|
|
|
286 }
|
|
|
287
|
|
|
288
|
|
42
|
289 ngx_int_t
|
|
|
290 ngx_enable_accept_events(ngx_cycle_t *cycle)
|
|
0
|
291 {
|
|
92
|
292 ngx_uint_t i;
|
|
|
293 ngx_listening_t *ls;
|
|
|
294 ngx_connection_t *c;
|
|
0
|
295
|
|
92
|
296 ls = cycle->listening.elts;
|
|
0
|
297 for (i = 0; i < cycle->listening.nelts; i++) {
|
|
|
298
|
|
92
|
299 c = ls[i].connection;
|
|
0
|
300
|
|
|
301 if (ngx_event_flags & NGX_USE_RTSIG_EVENT) {
|
|
92
|
302 if (ngx_add_conn(c) == NGX_ERROR) {
|
|
0
|
303 return NGX_ERROR;
|
|
|
304 }
|
|
|
305
|
|
|
306 } else {
|
|
92
|
307 if (ngx_add_event(c->read, NGX_READ_EVENT, 0) == NGX_ERROR) {
|
|
0
|
308 return NGX_ERROR;
|
|
|
309 }
|
|
|
310 }
|
|
|
311 }
|
|
|
312
|
|
|
313 return NGX_OK;
|
|
|
314 }
|
|
|
315
|
|
|
316
|
|
42
|
317 ngx_int_t
|
|
|
318 ngx_disable_accept_events(ngx_cycle_t *cycle)
|
|
0
|
319 {
|
|
92
|
320 ngx_uint_t i;
|
|
|
321 ngx_listening_t *ls;
|
|
|
322 ngx_connection_t *c;
|
|
0
|
323
|
|
92
|
324 ls = cycle->listening.elts;
|
|
0
|
325 for (i = 0; i < cycle->listening.nelts; i++) {
|
|
|
326
|
|
92
|
327 c = ls[i].connection;
|
|
|
328
|
|
|
329 if (!c->read->active) {
|
|
|
330 continue;
|
|
|
331 }
|
|
0
|
332
|
|
|
333 if (ngx_event_flags & NGX_USE_RTSIG_EVENT) {
|
|
92
|
334 if (ngx_del_conn(c, NGX_DISABLE_EVENT) == NGX_ERROR) {
|
|
0
|
335 return NGX_ERROR;
|
|
|
336 }
|
|
|
337
|
|
|
338 } else {
|
|
92
|
339 if (ngx_del_event(c->read, NGX_READ_EVENT, NGX_DISABLE_EVENT)
|
|
|
340 == NGX_ERROR)
|
|
0
|
341 {
|
|
|
342 return NGX_ERROR;
|
|
|
343 }
|
|
|
344 }
|
|
|
345 }
|
|
|
346
|
|
|
347 return NGX_OK;
|
|
|
348 }
|
|
|
349
|
|
|
350
|
|
42
|
351 static void
|
|
92
|
352 ngx_close_accepted_connection(ngx_connection_t *c)
|
|
0
|
353 {
|
|
92
|
354 ngx_socket_t fd;
|
|
|
355
|
|
|
356 ngx_free_connection(c);
|
|
|
357
|
|
|
358 fd = c->fd;
|
|
|
359 c->fd = (ngx_socket_t) -1;
|
|
|
360
|
|
|
361 if (ngx_close_socket(fd) == -1) {
|
|
|
362 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_socket_errno,
|
|
0
|
363 ngx_close_socket_n " failed");
|
|
|
364 }
|
|
44
|
365
|
|
92
|
366 if (c->pool) {
|
|
|
367 ngx_destroy_pool(c->pool);
|
|
|
368 }
|
|
|
369
|
|
44
|
370 #if (NGX_STAT_STUB)
|
|
110
|
371 ngx_atomic_fetch_add(ngx_stat_active, -1);
|
|
44
|
372 #endif
|
|
0
|
373 }
|
|
|
374
|
|
|
375
|
|
92
|
376 u_char *
|
|
42
|
377 ngx_accept_log_error(ngx_log_t *log, u_char *buf, size_t len)
|
|
0
|
378 {
|
|
92
|
379 return ngx_snprintf(buf, len, " while accepting new connection on %V",
|
|
|
380 log->data);
|
|
0
|
381 }
|
