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comparison src/stream/ngx_stream.c @ 6115:61d7ae76647d

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Stream: port from NGINX+.
author Ruslan Ermilov <ru@nginx.com>
date Mon, 20 Apr 2015 13:05:11 +0300
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children 187aa751ad62
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6114:4a640716f4e2 6115:61d7ae76647d
1
2 /*
3 * Copyright (C) Roman Arutyunyan
4 * Copyright (C) Nginx, Inc.
5 */
6
7
8 #include <ngx_config.h>
9 #include <ngx_core.h>
10 #include <ngx_event.h>
11 #include <ngx_stream.h>
12
13
14 static char *ngx_stream_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
15 static ngx_int_t ngx_stream_add_ports(ngx_conf_t *cf, ngx_array_t *ports,
16 ngx_stream_listen_t *listen);
17 static char *ngx_stream_optimize_servers(ngx_conf_t *cf, ngx_array_t *ports);
18 static ngx_int_t ngx_stream_add_addrs(ngx_conf_t *cf, ngx_stream_port_t *stport,
19 ngx_stream_conf_addr_t *addr);
20 #if (NGX_HAVE_INET6)
21 static ngx_int_t ngx_stream_add_addrs6(ngx_conf_t *cf,
22 ngx_stream_port_t *stport, ngx_stream_conf_addr_t *addr);
23 #endif
24 static ngx_int_t ngx_stream_cmp_conf_addrs(const void *one, const void *two);
25
26
27 ngx_uint_t ngx_stream_max_module;
28
29
30 static ngx_command_t ngx_stream_commands[] = {
31
32 { ngx_string("stream"),
33 NGX_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS,
34 ngx_stream_block,
35 0,
36 0,
37 NULL },
38
39 ngx_null_command
40 };
41
42
43 static ngx_core_module_t ngx_stream_module_ctx = {
44 ngx_string("stream"),
45 NULL,
46 NULL
47 };
48
49
50 ngx_module_t ngx_stream_module = {
51 NGX_MODULE_V1,
52 &ngx_stream_module_ctx, /* module context */
53 ngx_stream_commands, /* module directives */
54 NGX_CORE_MODULE, /* module type */
55 NULL, /* init master */
56 NULL, /* init module */
57 NULL, /* init process */
58 NULL, /* init thread */
59 NULL, /* exit thread */
60 NULL, /* exit process */
61 NULL, /* exit master */
62 NGX_MODULE_V1_PADDING
63 };
64
65
66 static char *
67 ngx_stream_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
68 {
69 char *rv;
70 ngx_uint_t i, m, mi, s;
71 ngx_conf_t pcf;
72 ngx_array_t ports;
73 ngx_stream_listen_t *listen;
74 ngx_stream_module_t *module;
75 ngx_stream_conf_ctx_t *ctx;
76 ngx_stream_core_srv_conf_t **cscfp;
77 ngx_stream_core_main_conf_t *cmcf;
78
79 /* the main stream context */
80
81 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_stream_conf_ctx_t));
82 if (ctx == NULL) {
83 return NGX_CONF_ERROR;
84 }
85
86 *(ngx_stream_conf_ctx_t **) conf = ctx;
87
88 /* count the number of the stream modules and set up their indices */
89
90 ngx_stream_max_module = 0;
91 for (m = 0; ngx_modules[m]; m++) {
92 if (ngx_modules[m]->type != NGX_STREAM_MODULE) {
93 continue;
94 }
95
96 ngx_modules[m]->ctx_index = ngx_stream_max_module++;
97 }
98
99
100 /* the stream main_conf context, it's the same in the all stream contexts */
101
102 ctx->main_conf = ngx_pcalloc(cf->pool,
103 sizeof(void *) * ngx_stream_max_module);
104 if (ctx->main_conf == NULL) {
105 return NGX_CONF_ERROR;
106 }
107
108
109 /*
110 * the stream null srv_conf context, it is used to merge
111 * the server{}s' srv_conf's
112 */
113
114 ctx->srv_conf = ngx_pcalloc(cf->pool,
115 sizeof(void *) * ngx_stream_max_module);
116 if (ctx->srv_conf == NULL) {
117 return NGX_CONF_ERROR;
118 }
119
120
121 /*
122 * create the main_conf's and the null srv_conf's of the all stream modules
123 */
124
125 for (m = 0; ngx_modules[m]; m++) {
126 if (ngx_modules[m]->type != NGX_STREAM_MODULE) {
127 continue;
128 }
129
130 module = ngx_modules[m]->ctx;
131 mi = ngx_modules[m]->ctx_index;
132
133 if (module->create_main_conf) {
134 ctx->main_conf[mi] = module->create_main_conf(cf);
135 if (ctx->main_conf[mi] == NULL) {
136 return NGX_CONF_ERROR;
137 }
138 }
139
140 if (module->create_srv_conf) {
141 ctx->srv_conf[mi] = module->create_srv_conf(cf);
142 if (ctx->srv_conf[mi] == NULL) {
143 return NGX_CONF_ERROR;
144 }
145 }
146 }
147
148
149 /* parse inside the stream{} block */
150
151 pcf = *cf;
152 cf->ctx = ctx;
153
154 cf->module_type = NGX_STREAM_MODULE;
155 cf->cmd_type = NGX_STREAM_MAIN_CONF;
156 rv = ngx_conf_parse(cf, NULL);
157
158 if (rv != NGX_CONF_OK) {
159 *cf = pcf;
160 return rv;
161 }
162
163
164 /* init stream{} main_conf's, merge the server{}s' srv_conf's */
165
166 cmcf = ctx->main_conf[ngx_stream_core_module.ctx_index];
167 cscfp = cmcf->servers.elts;
168
169 for (m = 0; ngx_modules[m]; m++) {
170 if (ngx_modules[m]->type != NGX_STREAM_MODULE) {
171 continue;
172 }
173
174 module = ngx_modules[m]->ctx;
175 mi = ngx_modules[m]->ctx_index;
176
177 /* init stream{} main_conf's */
178
179 cf->ctx = ctx;
180
181 if (module->init_main_conf) {
182 rv = module->init_main_conf(cf, ctx->main_conf[mi]);
183 if (rv != NGX_CONF_OK) {
184 *cf = pcf;
185 return rv;
186 }
187 }
188
189 for (s = 0; s < cmcf->servers.nelts; s++) {
190
191 /* merge the server{}s' srv_conf's */
192
193 cf->ctx = cscfp[s]->ctx;
194
195 if (module->merge_srv_conf) {
196 rv = module->merge_srv_conf(cf,
197 ctx->srv_conf[mi],
198 cscfp[s]->ctx->srv_conf[mi]);
199 if (rv != NGX_CONF_OK) {
200 *cf = pcf;
201 return rv;
202 }
203 }
204 }
205 }
206
207 *cf = pcf;
208
209
210 if (ngx_array_init(&ports, cf->temp_pool, 4, sizeof(ngx_stream_conf_port_t))
211 != NGX_OK)
212 {
213 return NGX_CONF_ERROR;
214 }
215
216 listen = cmcf->listen.elts;
217
218 for (i = 0; i < cmcf->listen.nelts; i++) {
219 if (ngx_stream_add_ports(cf, &ports, &listen[i]) != NGX_OK) {
220 return NGX_CONF_ERROR;
221 }
222 }
223
224 return ngx_stream_optimize_servers(cf, &ports);
225 }
226
227
228 static ngx_int_t
229 ngx_stream_add_ports(ngx_conf_t *cf, ngx_array_t *ports,
230 ngx_stream_listen_t *listen)
231 {
232 in_port_t p;
233 ngx_uint_t i;
234 struct sockaddr *sa;
235 struct sockaddr_in *sin;
236 ngx_stream_conf_port_t *port;
237 ngx_stream_conf_addr_t *addr;
238 #if (NGX_HAVE_INET6)
239 struct sockaddr_in6 *sin6;
240 #endif
241
242 sa = (struct sockaddr *) &listen->sockaddr;
243
244 switch (sa->sa_family) {
245
246 #if (NGX_HAVE_INET6)
247 case AF_INET6:
248 sin6 = (struct sockaddr_in6 *) sa;
249 p = sin6->sin6_port;
250 break;
251 #endif
252
253 #if (NGX_HAVE_UNIX_DOMAIN)
254 case AF_UNIX:
255 p = 0;
256 break;
257 #endif
258
259 default: /* AF_INET */
260 sin = (struct sockaddr_in *) sa;
261 p = sin->sin_port;
262 break;
263 }
264
265 port = ports->elts;
266 for (i = 0; i < ports->nelts; i++) {
267 if (p == port[i].port && sa->sa_family == port[i].family) {
268
269 /* a port is already in the port list */
270
271 port = &port[i];
272 goto found;
273 }
274 }
275
276 /* add a port to the port list */
277
278 port = ngx_array_push(ports);
279 if (port == NULL) {
280 return NGX_ERROR;
281 }
282
283 port->family = sa->sa_family;
284 port->port = p;
285
286 if (ngx_array_init(&port->addrs, cf->temp_pool, 2,
287 sizeof(ngx_stream_conf_addr_t))
288 != NGX_OK)
289 {
290 return NGX_ERROR;
291 }
292
293 found:
294
295 addr = ngx_array_push(&port->addrs);
296 if (addr == NULL) {
297 return NGX_ERROR;
298 }
299
300 addr->sockaddr = (struct sockaddr *) &listen->sockaddr;
301 addr->socklen = listen->socklen;
302 addr->ctx = listen->ctx;
303 addr->bind = listen->bind;
304 addr->wildcard = listen->wildcard;
305 addr->so_keepalive = listen->so_keepalive;
306 #if (NGX_HAVE_KEEPALIVE_TUNABLE)
307 addr->tcp_keepidle = listen->tcp_keepidle;
308 addr->tcp_keepintvl = listen->tcp_keepintvl;
309 addr->tcp_keepcnt = listen->tcp_keepcnt;
310 #endif
311 #if (NGX_STREAM_SSL)
312 addr->ssl = listen->ssl;
313 #endif
314 #if (NGX_HAVE_INET6 && defined IPV6_V6ONLY)
315 addr->ipv6only = listen->ipv6only;
316 #endif
317
318 return NGX_OK;
319 }
320
321
322 static char *
323 ngx_stream_optimize_servers(ngx_conf_t *cf, ngx_array_t *ports)
324 {
325 ngx_uint_t i, p, last, bind_wildcard;
326 ngx_listening_t *ls;
327 ngx_stream_port_t *stport;
328 ngx_stream_conf_port_t *port;
329 ngx_stream_conf_addr_t *addr;
330 ngx_stream_core_srv_conf_t *cscf;
331
332 port = ports->elts;
333 for (p = 0; p < ports->nelts; p++) {
334
335 ngx_sort(port[p].addrs.elts, (size_t) port[p].addrs.nelts,
336 sizeof(ngx_stream_conf_addr_t), ngx_stream_cmp_conf_addrs);
337
338 addr = port[p].addrs.elts;
339 last = port[p].addrs.nelts;
340
341 /*
342 * if there is the binding to the "*:port" then we need to bind()
343 * to the "*:port" only and ignore the other bindings
344 */
345
346 if (addr[last - 1].wildcard) {
347 addr[last - 1].bind = 1;
348 bind_wildcard = 1;
349
350 } else {
351 bind_wildcard = 0;
352 }
353
354 i = 0;
355
356 while (i < last) {
357
358 if (bind_wildcard && !addr[i].bind) {
359 i++;
360 continue;
361 }
362
363 ls = ngx_create_listening(cf, addr[i].sockaddr, addr[i].socklen);
364 if (ls == NULL) {
365 return NGX_CONF_ERROR;
366 }
367
368 ls->addr_ntop = 1;
369 ls->handler = ngx_stream_init_connection;
370 ls->pool_size = 256;
371
372 cscf = addr->ctx->srv_conf[ngx_stream_core_module.ctx_index];
373 ls->logp = cscf->error_log;
374
375 ls->log.data = &ls->addr_text;
376 ls->log.handler = ngx_accept_log_error;
377
378 ls->keepalive = addr[i].so_keepalive;
379 #if (NGX_HAVE_KEEPALIVE_TUNABLE)
380 ls->keepidle = addr[i].tcp_keepidle;
381 ls->keepintvl = addr[i].tcp_keepintvl;
382 ls->keepcnt = addr[i].tcp_keepcnt;
383 #endif
384
385 #if (NGX_HAVE_INET6 && defined IPV6_V6ONLY)
386 ls->ipv6only = addr[i].ipv6only;
387 #endif
388
389 stport = ngx_palloc(cf->pool, sizeof(ngx_stream_port_t));
390 if (stport == NULL) {
391 return NGX_CONF_ERROR;
392 }
393
394 ls->servers = stport;
395
396 if (i == last - 1) {
397 stport->naddrs = last;
398
399 } else {
400 stport->naddrs = 1;
401 i = 0;
402 }
403
404 switch (ls->sockaddr->sa_family) {
405 #if (NGX_HAVE_INET6)
406 case AF_INET6:
407 if (ngx_stream_add_addrs6(cf, stport, addr) != NGX_OK) {
408 return NGX_CONF_ERROR;
409 }
410 break;
411 #endif
412 default: /* AF_INET */
413 if (ngx_stream_add_addrs(cf, stport, addr) != NGX_OK) {
414 return NGX_CONF_ERROR;
415 }
416 break;
417 }
418
419 addr++;
420 last--;
421 }
422 }
423
424 return NGX_CONF_OK;
425 }
426
427
428 static ngx_int_t
429 ngx_stream_add_addrs(ngx_conf_t *cf, ngx_stream_port_t *stport,
430 ngx_stream_conf_addr_t *addr)
431 {
432 u_char *p;
433 size_t len;
434 ngx_uint_t i;
435 struct sockaddr_in *sin;
436 ngx_stream_in_addr_t *addrs;
437 u_char buf[NGX_SOCKADDR_STRLEN];
438
439 stport->addrs = ngx_pcalloc(cf->pool,
440 stport->naddrs * sizeof(ngx_stream_in_addr_t));
441 if (stport->addrs == NULL) {
442 return NGX_ERROR;
443 }
444
445 addrs = stport->addrs;
446
447 for (i = 0; i < stport->naddrs; i++) {
448
449 sin = (struct sockaddr_in *) addr[i].sockaddr;
450 addrs[i].addr = sin->sin_addr.s_addr;
451
452 addrs[i].conf.ctx = addr[i].ctx;
453 #if (NGX_STREAM_SSL)
454 addrs[i].conf.ssl = addr[i].ssl;
455 #endif
456
457 len = ngx_sock_ntop(addr[i].sockaddr, addr[i].socklen, buf,
458 NGX_SOCKADDR_STRLEN, 1);
459
460 p = ngx_pnalloc(cf->pool, len);
461 if (p == NULL) {
462 return NGX_ERROR;
463 }
464
465 ngx_memcpy(p, buf, len);
466
467 addrs[i].conf.addr_text.len = len;
468 addrs[i].conf.addr_text.data = p;
469 }
470
471 return NGX_OK;
472 }
473
474
475 #if (NGX_HAVE_INET6)
476
477 static ngx_int_t
478 ngx_stream_add_addrs6(ngx_conf_t *cf, ngx_stream_port_t *stport,
479 ngx_stream_conf_addr_t *addr)
480 {
481 u_char *p;
482 size_t len;
483 ngx_uint_t i;
484 struct sockaddr_in6 *sin6;
485 ngx_stream_in6_addr_t *addrs6;
486 u_char buf[NGX_SOCKADDR_STRLEN];
487
488 stport->addrs = ngx_pcalloc(cf->pool,
489 stport->naddrs * sizeof(ngx_stream_in6_addr_t));
490 if (stport->addrs == NULL) {
491 return NGX_ERROR;
492 }
493
494 addrs6 = stport->addrs;
495
496 for (i = 0; i < stport->naddrs; i++) {
497
498 sin6 = (struct sockaddr_in6 *) addr[i].sockaddr;
499 addrs6[i].addr6 = sin6->sin6_addr;
500
501 addrs6[i].conf.ctx = addr[i].ctx;
502 #if (NGX_STREAM_SSL)
503 addrs6[i].conf.ssl = addr[i].ssl;
504 #endif
505
506 len = ngx_sock_ntop(addr[i].sockaddr, addr[i].socklen, buf,
507 NGX_SOCKADDR_STRLEN, 1);
508
509 p = ngx_pnalloc(cf->pool, len);
510 if (p == NULL) {
511 return NGX_ERROR;
512 }
513
514 ngx_memcpy(p, buf, len);
515
516 addrs6[i].conf.addr_text.len = len;
517 addrs6[i].conf.addr_text.data = p;
518 }
519
520 return NGX_OK;
521 }
522
523 #endif
524
525
526 static ngx_int_t
527 ngx_stream_cmp_conf_addrs(const void *one, const void *two)
528 {
529 ngx_stream_conf_addr_t *first, *second;
530
531 first = (ngx_stream_conf_addr_t *) one;
532 second = (ngx_stream_conf_addr_t *) two;
533
534 if (first->wildcard) {
535 /* a wildcard must be the last resort, shift it to the end */
536 return 1;
537 }
538
539 if (second->wildcard) {
540 /* a wildcard must be the last resort, shift it to the end */
541 return -1;
542 }
543
544 if (first->bind && !second->bind) {
545 /* shift explicit bind()ed addresses to the start */
546 return -1;
547 }
548
549 if (!first->bind && second->bind) {
550 /* shift explicit bind()ed addresses to the start */
551 return 1;
552 }
553
554 /* do not sort by default */
555
556 return 0;
557 }