Mercurial > hg > nginx
annotate src/stream/ngx_stream.c @ 6436:8f038068f4bc
Stream: UDP proxy.
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Wed, 20 Jan 2016 19:52:12 +0300 |
parents | cf5e822cf470 |
children | c90cf79d0e1d |
rev | line source |
---|---|
6115 | 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 | |
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79 if (*(ngx_stream_conf_ctx_t **) conf) { |
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80 return "is duplicate"; |
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81 } |
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82 |
6115 | 83 /* the main stream context */ |
84 | |
85 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_stream_conf_ctx_t)); | |
86 if (ctx == NULL) { | |
87 return NGX_CONF_ERROR; | |
88 } | |
89 | |
90 *(ngx_stream_conf_ctx_t **) conf = ctx; | |
91 | |
92 /* count the number of the stream modules and set up their indices */ | |
93 | |
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94 ngx_stream_max_module = ngx_count_modules(cf->cycle, NGX_STREAM_MODULE); |
6115 | 95 |
96 | |
97 /* the stream main_conf context, it's the same in the all stream contexts */ | |
98 | |
99 ctx->main_conf = ngx_pcalloc(cf->pool, | |
100 sizeof(void *) * ngx_stream_max_module); | |
101 if (ctx->main_conf == NULL) { | |
102 return NGX_CONF_ERROR; | |
103 } | |
104 | |
105 | |
106 /* | |
107 * the stream null srv_conf context, it is used to merge | |
108 * the server{}s' srv_conf's | |
109 */ | |
110 | |
111 ctx->srv_conf = ngx_pcalloc(cf->pool, | |
112 sizeof(void *) * ngx_stream_max_module); | |
113 if (ctx->srv_conf == NULL) { | |
114 return NGX_CONF_ERROR; | |
115 } | |
116 | |
117 | |
118 /* | |
119 * create the main_conf's and the null srv_conf's of the all stream modules | |
120 */ | |
121 | |
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122 for (m = 0; cf->cycle->modules[m]; m++) { |
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123 if (cf->cycle->modules[m]->type != NGX_STREAM_MODULE) { |
6115 | 124 continue; |
125 } | |
126 | |
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127 module = cf->cycle->modules[m]->ctx; |
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128 mi = cf->cycle->modules[m]->ctx_index; |
6115 | 129 |
130 if (module->create_main_conf) { | |
131 ctx->main_conf[mi] = module->create_main_conf(cf); | |
132 if (ctx->main_conf[mi] == NULL) { | |
133 return NGX_CONF_ERROR; | |
134 } | |
135 } | |
136 | |
137 if (module->create_srv_conf) { | |
138 ctx->srv_conf[mi] = module->create_srv_conf(cf); | |
139 if (ctx->srv_conf[mi] == NULL) { | |
140 return NGX_CONF_ERROR; | |
141 } | |
142 } | |
143 } | |
144 | |
145 | |
146 /* parse inside the stream{} block */ | |
147 | |
148 pcf = *cf; | |
149 cf->ctx = ctx; | |
150 | |
151 cf->module_type = NGX_STREAM_MODULE; | |
152 cf->cmd_type = NGX_STREAM_MAIN_CONF; | |
153 rv = ngx_conf_parse(cf, NULL); | |
154 | |
155 if (rv != NGX_CONF_OK) { | |
156 *cf = pcf; | |
157 return rv; | |
158 } | |
159 | |
160 | |
161 /* init stream{} main_conf's, merge the server{}s' srv_conf's */ | |
162 | |
163 cmcf = ctx->main_conf[ngx_stream_core_module.ctx_index]; | |
164 cscfp = cmcf->servers.elts; | |
165 | |
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166 for (m = 0; cf->cycle->modules[m]; m++) { |
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167 if (cf->cycle->modules[m]->type != NGX_STREAM_MODULE) { |
6115 | 168 continue; |
169 } | |
170 | |
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171 module = cf->cycle->modules[m]->ctx; |
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172 mi = cf->cycle->modules[m]->ctx_index; |
6115 | 173 |
174 /* init stream{} main_conf's */ | |
175 | |
176 cf->ctx = ctx; | |
177 | |
178 if (module->init_main_conf) { | |
179 rv = module->init_main_conf(cf, ctx->main_conf[mi]); | |
180 if (rv != NGX_CONF_OK) { | |
181 *cf = pcf; | |
182 return rv; | |
183 } | |
184 } | |
185 | |
186 for (s = 0; s < cmcf->servers.nelts; s++) { | |
187 | |
188 /* merge the server{}s' srv_conf's */ | |
189 | |
190 cf->ctx = cscfp[s]->ctx; | |
191 | |
192 if (module->merge_srv_conf) { | |
193 rv = module->merge_srv_conf(cf, | |
194 ctx->srv_conf[mi], | |
195 cscfp[s]->ctx->srv_conf[mi]); | |
196 if (rv != NGX_CONF_OK) { | |
197 *cf = pcf; | |
198 return rv; | |
199 } | |
200 } | |
201 } | |
202 } | |
203 | |
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204 for (m = 0; cf->cycle->modules[m]; m++) { |
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205 if (cf->cycle->modules[m]->type != NGX_STREAM_MODULE) { |
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206 continue; |
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207 } |
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208 |
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209 module = cf->cycle->modules[m]->ctx; |
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210 |
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211 if (module->postconfiguration) { |
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212 if (module->postconfiguration(cf) != NGX_OK) { |
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213 return NGX_CONF_ERROR; |
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214 } |
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215 } |
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216 } |
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217 |
6115 | 218 *cf = pcf; |
219 | |
220 | |
221 if (ngx_array_init(&ports, cf->temp_pool, 4, sizeof(ngx_stream_conf_port_t)) | |
222 != NGX_OK) | |
223 { | |
224 return NGX_CONF_ERROR; | |
225 } | |
226 | |
227 listen = cmcf->listen.elts; | |
228 | |
229 for (i = 0; i < cmcf->listen.nelts; i++) { | |
230 if (ngx_stream_add_ports(cf, &ports, &listen[i]) != NGX_OK) { | |
231 return NGX_CONF_ERROR; | |
232 } | |
233 } | |
234 | |
235 return ngx_stream_optimize_servers(cf, &ports); | |
236 } | |
237 | |
238 | |
239 static ngx_int_t | |
240 ngx_stream_add_ports(ngx_conf_t *cf, ngx_array_t *ports, | |
241 ngx_stream_listen_t *listen) | |
242 { | |
243 in_port_t p; | |
244 ngx_uint_t i; | |
245 struct sockaddr *sa; | |
246 struct sockaddr_in *sin; | |
247 ngx_stream_conf_port_t *port; | |
248 ngx_stream_conf_addr_t *addr; | |
249 #if (NGX_HAVE_INET6) | |
250 struct sockaddr_in6 *sin6; | |
251 #endif | |
252 | |
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253 sa = &listen->u.sockaddr; |
6115 | 254 |
255 switch (sa->sa_family) { | |
256 | |
257 #if (NGX_HAVE_INET6) | |
258 case AF_INET6: | |
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259 sin6 = &listen->u.sockaddr_in6; |
6115 | 260 p = sin6->sin6_port; |
261 break; | |
262 #endif | |
263 | |
264 #if (NGX_HAVE_UNIX_DOMAIN) | |
265 case AF_UNIX: | |
266 p = 0; | |
267 break; | |
268 #endif | |
269 | |
270 default: /* AF_INET */ | |
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271 sin = &listen->u.sockaddr_in; |
6115 | 272 p = sin->sin_port; |
273 break; | |
274 } | |
275 | |
276 port = ports->elts; | |
277 for (i = 0; i < ports->nelts; i++) { | |
278 | |
6436 | 279 if (p == port[i].port |
280 && listen->type == port[i].type | |
281 && sa->sa_family == port[i].family) | |
282 { | |
6115 | 283 /* a port is already in the port list */ |
284 | |
285 port = &port[i]; | |
286 goto found; | |
287 } | |
288 } | |
289 | |
290 /* add a port to the port list */ | |
291 | |
292 port = ngx_array_push(ports); | |
293 if (port == NULL) { | |
294 return NGX_ERROR; | |
295 } | |
296 | |
297 port->family = sa->sa_family; | |
6436 | 298 port->type = listen->type; |
6115 | 299 port->port = p; |
300 | |
301 if (ngx_array_init(&port->addrs, cf->temp_pool, 2, | |
302 sizeof(ngx_stream_conf_addr_t)) | |
303 != NGX_OK) | |
304 { | |
305 return NGX_ERROR; | |
306 } | |
307 | |
308 found: | |
309 | |
310 addr = ngx_array_push(&port->addrs); | |
311 if (addr == NULL) { | |
312 return NGX_ERROR; | |
313 } | |
314 | |
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315 addr->opt = *listen; |
6115 | 316 |
317 return NGX_OK; | |
318 } | |
319 | |
320 | |
321 static char * | |
322 ngx_stream_optimize_servers(ngx_conf_t *cf, ngx_array_t *ports) | |
323 { | |
324 ngx_uint_t i, p, last, bind_wildcard; | |
325 ngx_listening_t *ls; | |
326 ngx_stream_port_t *stport; | |
327 ngx_stream_conf_port_t *port; | |
328 ngx_stream_conf_addr_t *addr; | |
329 ngx_stream_core_srv_conf_t *cscf; | |
330 | |
331 port = ports->elts; | |
332 for (p = 0; p < ports->nelts; p++) { | |
333 | |
334 ngx_sort(port[p].addrs.elts, (size_t) port[p].addrs.nelts, | |
335 sizeof(ngx_stream_conf_addr_t), ngx_stream_cmp_conf_addrs); | |
336 | |
337 addr = port[p].addrs.elts; | |
338 last = port[p].addrs.nelts; | |
339 | |
340 /* | |
341 * if there is the binding to the "*:port" then we need to bind() | |
342 * to the "*:port" only and ignore the other bindings | |
343 */ | |
344 | |
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345 if (addr[last - 1].opt.wildcard) { |
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346 addr[last - 1].opt.bind = 1; |
6115 | 347 bind_wildcard = 1; |
348 | |
349 } else { | |
350 bind_wildcard = 0; | |
351 } | |
352 | |
353 i = 0; | |
354 | |
355 while (i < last) { | |
356 | |
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357 if (bind_wildcard && !addr[i].opt.bind) { |
6115 | 358 i++; |
359 continue; | |
360 } | |
361 | |
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362 ls = ngx_create_listening(cf, &addr[i].opt.u.sockaddr, |
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363 addr[i].opt.socklen); |
6115 | 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; | |
6436 | 371 ls->type = addr[i].opt.type; |
6115 | 372 |
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373 cscf = addr->opt.ctx->srv_conf[ngx_stream_core_module.ctx_index]; |
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374 |
6115 | 375 ls->logp = cscf->error_log; |
376 ls->log.data = &ls->addr_text; | |
377 ls->log.handler = ngx_accept_log_error; | |
378 | |
6172 | 379 ls->backlog = addr[i].opt.backlog; |
380 | |
6436 | 381 ls->wildcard = addr[i].opt.wildcard; |
382 | |
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383 ls->keepalive = addr[i].opt.so_keepalive; |
6115 | 384 #if (NGX_HAVE_KEEPALIVE_TUNABLE) |
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385 ls->keepidle = addr[i].opt.tcp_keepidle; |
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386 ls->keepintvl = addr[i].opt.tcp_keepintvl; |
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387 ls->keepcnt = addr[i].opt.tcp_keepcnt; |
6115 | 388 #endif |
389 | |
390 #if (NGX_HAVE_INET6 && defined IPV6_V6ONLY) | |
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391 ls->ipv6only = addr[i].opt.ipv6only; |
6115 | 392 #endif |
393 | |
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394 #if (NGX_HAVE_REUSEPORT) |
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395 ls->reuseport = addr[i].opt.reuseport; |
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396 #endif |
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397 |
6115 | 398 stport = ngx_palloc(cf->pool, sizeof(ngx_stream_port_t)); |
399 if (stport == NULL) { | |
400 return NGX_CONF_ERROR; | |
401 } | |
402 | |
403 ls->servers = stport; | |
404 | |
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diff
changeset
|
405 stport->naddrs = i + 1; |
6115 | 406 |
407 switch (ls->sockaddr->sa_family) { | |
408 #if (NGX_HAVE_INET6) | |
409 case AF_INET6: | |
410 if (ngx_stream_add_addrs6(cf, stport, addr) != NGX_OK) { | |
411 return NGX_CONF_ERROR; | |
412 } | |
413 break; | |
414 #endif | |
415 default: /* AF_INET */ | |
416 if (ngx_stream_add_addrs(cf, stport, addr) != NGX_OK) { | |
417 return NGX_CONF_ERROR; | |
418 } | |
419 break; | |
420 } | |
421 | |
6153
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The "reuseport" option of the "listen" directive.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6152
diff
changeset
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422 if (ngx_clone_listening(cf, ls) != NGX_OK) { |
4f6efabcb09b
The "reuseport" option of the "listen" directive.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6152
diff
changeset
|
423 return NGX_CONF_ERROR; |
4f6efabcb09b
The "reuseport" option of the "listen" directive.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6152
diff
changeset
|
424 } |
4f6efabcb09b
The "reuseport" option of the "listen" directive.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6152
diff
changeset
|
425 |
6115 | 426 addr++; |
427 last--; | |
428 } | |
429 } | |
430 | |
431 return NGX_CONF_OK; | |
432 } | |
433 | |
434 | |
435 static ngx_int_t | |
436 ngx_stream_add_addrs(ngx_conf_t *cf, ngx_stream_port_t *stport, | |
437 ngx_stream_conf_addr_t *addr) | |
438 { | |
439 u_char *p; | |
440 size_t len; | |
441 ngx_uint_t i; | |
442 struct sockaddr_in *sin; | |
443 ngx_stream_in_addr_t *addrs; | |
444 u_char buf[NGX_SOCKADDR_STRLEN]; | |
445 | |
446 stport->addrs = ngx_pcalloc(cf->pool, | |
447 stport->naddrs * sizeof(ngx_stream_in_addr_t)); | |
448 if (stport->addrs == NULL) { | |
449 return NGX_ERROR; | |
450 } | |
451 | |
452 addrs = stport->addrs; | |
453 | |
454 for (i = 0; i < stport->naddrs; i++) { | |
455 | |
6170
c13091e6292c
Stream: embed ngx_stream_listen_t into ngx_stream_conf_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
6169
diff
changeset
|
456 sin = &addr[i].opt.u.sockaddr_in; |
6115 | 457 addrs[i].addr = sin->sin_addr.s_addr; |
458 | |
6170
c13091e6292c
Stream: embed ngx_stream_listen_t into ngx_stream_conf_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
6169
diff
changeset
|
459 addrs[i].conf.ctx = addr[i].opt.ctx; |
6115 | 460 #if (NGX_STREAM_SSL) |
6170
c13091e6292c
Stream: embed ngx_stream_listen_t into ngx_stream_conf_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
6169
diff
changeset
|
461 addrs[i].conf.ssl = addr[i].opt.ssl; |
6115 | 462 #endif |
463 | |
6170
c13091e6292c
Stream: embed ngx_stream_listen_t into ngx_stream_conf_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
6169
diff
changeset
|
464 len = ngx_sock_ntop(&addr[i].opt.u.sockaddr, addr[i].opt.socklen, buf, |
6115 | 465 NGX_SOCKADDR_STRLEN, 1); |
466 | |
467 p = ngx_pnalloc(cf->pool, len); | |
468 if (p == NULL) { | |
469 return NGX_ERROR; | |
470 } | |
471 | |
472 ngx_memcpy(p, buf, len); | |
473 | |
474 addrs[i].conf.addr_text.len = len; | |
475 addrs[i].conf.addr_text.data = p; | |
476 } | |
477 | |
478 return NGX_OK; | |
479 } | |
480 | |
481 | |
482 #if (NGX_HAVE_INET6) | |
483 | |
484 static ngx_int_t | |
485 ngx_stream_add_addrs6(ngx_conf_t *cf, ngx_stream_port_t *stport, | |
486 ngx_stream_conf_addr_t *addr) | |
487 { | |
488 u_char *p; | |
489 size_t len; | |
490 ngx_uint_t i; | |
491 struct sockaddr_in6 *sin6; | |
492 ngx_stream_in6_addr_t *addrs6; | |
493 u_char buf[NGX_SOCKADDR_STRLEN]; | |
494 | |
495 stport->addrs = ngx_pcalloc(cf->pool, | |
496 stport->naddrs * sizeof(ngx_stream_in6_addr_t)); | |
497 if (stport->addrs == NULL) { | |
498 return NGX_ERROR; | |
499 } | |
500 | |
501 addrs6 = stport->addrs; | |
502 | |
503 for (i = 0; i < stport->naddrs; i++) { | |
504 | |
6170
c13091e6292c
Stream: embed ngx_stream_listen_t into ngx_stream_conf_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
6169
diff
changeset
|
505 sin6 = &addr[i].opt.u.sockaddr_in6; |
6115 | 506 addrs6[i].addr6 = sin6->sin6_addr; |
507 | |
6170
c13091e6292c
Stream: embed ngx_stream_listen_t into ngx_stream_conf_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
6169
diff
changeset
|
508 addrs6[i].conf.ctx = addr[i].opt.ctx; |
6115 | 509 #if (NGX_STREAM_SSL) |
6170
c13091e6292c
Stream: embed ngx_stream_listen_t into ngx_stream_conf_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
6169
diff
changeset
|
510 addrs6[i].conf.ssl = addr[i].opt.ssl; |
6115 | 511 #endif |
512 | |
6170
c13091e6292c
Stream: embed ngx_stream_listen_t into ngx_stream_conf_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
6169
diff
changeset
|
513 len = ngx_sock_ntop(&addr[i].opt.u.sockaddr, addr[i].opt.socklen, buf, |
6115 | 514 NGX_SOCKADDR_STRLEN, 1); |
515 | |
516 p = ngx_pnalloc(cf->pool, len); | |
517 if (p == NULL) { | |
518 return NGX_ERROR; | |
519 } | |
520 | |
521 ngx_memcpy(p, buf, len); | |
522 | |
523 addrs6[i].conf.addr_text.len = len; | |
524 addrs6[i].conf.addr_text.data = p; | |
525 } | |
526 | |
527 return NGX_OK; | |
528 } | |
529 | |
530 #endif | |
531 | |
532 | |
533 static ngx_int_t | |
534 ngx_stream_cmp_conf_addrs(const void *one, const void *two) | |
535 { | |
536 ngx_stream_conf_addr_t *first, *second; | |
537 | |
538 first = (ngx_stream_conf_addr_t *) one; | |
539 second = (ngx_stream_conf_addr_t *) two; | |
540 | |
6170
c13091e6292c
Stream: embed ngx_stream_listen_t into ngx_stream_conf_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
6169
diff
changeset
|
541 if (first->opt.wildcard) { |
6115 | 542 /* a wildcard must be the last resort, shift it to the end */ |
543 return 1; | |
544 } | |
545 | |
6170
c13091e6292c
Stream: embed ngx_stream_listen_t into ngx_stream_conf_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
6169
diff
changeset
|
546 if (second->opt.wildcard) { |
6115 | 547 /* a wildcard must be the last resort, shift it to the end */ |
548 return -1; | |
549 } | |
550 | |
6170
c13091e6292c
Stream: embed ngx_stream_listen_t into ngx_stream_conf_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
6169
diff
changeset
|
551 if (first->opt.bind && !second->opt.bind) { |
6115 | 552 /* shift explicit bind()ed addresses to the start */ |
553 return -1; | |
554 } | |
555 | |
6170
c13091e6292c
Stream: embed ngx_stream_listen_t into ngx_stream_conf_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
6169
diff
changeset
|
556 if (!first->opt.bind && second->opt.bind) { |
6115 | 557 /* shift explicit bind()ed addresses to the start */ |
558 return 1; | |
559 } | |
560 | |
561 /* do not sort by default */ | |
562 | |
563 return 0; | |
564 } |