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 #include <ngx_mail.h>
11
12
13 static void *ngx_mail_core_create_main_conf(ngx_conf_t *cf);
14 static void *ngx_mail_core_create_srv_conf(ngx_conf_t *cf);
15 static char *ngx_mail_core_merge_srv_conf(ngx_conf_t *cf, void *parent,
16 void *child);
17 static char *ngx_mail_core_server(ngx_conf_t *cf, ngx_command_t *cmd,
18 void *conf);
19 static char *ngx_mail_core_listen(ngx_conf_t *cf, ngx_command_t *cmd,
20 void *conf);
21 static char *ngx_mail_core_protocol(ngx_conf_t *cf, ngx_command_t *cmd,
22 void *conf);
23 static char *ngx_mail_core_resolver(ngx_conf_t *cf, ngx_command_t *cmd,
24 void *conf);
25
26
27 static ngx_command_t ngx_mail_core_commands[] = {
28
29 { ngx_string("server"),
30 NGX_MAIL_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS,
31 ngx_mail_core_server,
32 0,
33 0,
34 NULL },
35
36 { ngx_string("listen"),
37 NGX_MAIL_SRV_CONF|NGX_CONF_TAKE12,
38 ngx_mail_core_listen,
39 NGX_MAIL_SRV_CONF_OFFSET,
40 0,
41 NULL },
42
43 { ngx_string("protocol"),
44 NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
45 ngx_mail_core_protocol,
46 NGX_MAIL_SRV_CONF_OFFSET,
47 0,
48 NULL },
49
50 { ngx_string("so_keepalive"),
51 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_FLAG,
52 ngx_conf_set_flag_slot,
53 NGX_MAIL_SRV_CONF_OFFSET,
54 offsetof(ngx_mail_core_srv_conf_t, so_keepalive),
55 NULL },
56
57 { ngx_string("timeout"),
58 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
59 ngx_conf_set_msec_slot,
60 NGX_MAIL_SRV_CONF_OFFSET,
61 offsetof(ngx_mail_core_srv_conf_t, timeout),
62 NULL },
63
64 { ngx_string("server_name"),
65 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
66 ngx_conf_set_str_slot,
67 NGX_MAIL_SRV_CONF_OFFSET,
68 offsetof(ngx_mail_core_srv_conf_t, server_name),
69 NULL },
70
71 { ngx_string("resolver"),
72 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
73 ngx_mail_core_resolver,
74 NGX_MAIL_SRV_CONF_OFFSET,
75 0,
76 NULL },
77
78 { ngx_string("resolver_timeout"),
79 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
80 ngx_conf_set_msec_slot,
81 NGX_MAIL_SRV_CONF_OFFSET,
82 offsetof(ngx_mail_core_srv_conf_t, resolver_timeout),
83 NULL },
84
85 ngx_null_command
86 };
87
88
89 static ngx_mail_module_t ngx_mail_core_module_ctx = {
90 NULL, /* protocol */
91
92 ngx_mail_core_create_main_conf, /* create main configuration */
93 NULL, /* init main configuration */
94
95 ngx_mail_core_create_srv_conf, /* create server configuration */
96 ngx_mail_core_merge_srv_conf /* merge server configuration */
97 };
98
99
100 ngx_module_t ngx_mail_core_module = {
101 NGX_MODULE_V1,
102 &ngx_mail_core_module_ctx, /* module context */
103 ngx_mail_core_commands, /* module directives */
104 NGX_MAIL_MODULE, /* module type */
105 NULL, /* init master */
106 NULL, /* init module */
107 NULL, /* init process */
108 NULL, /* init thread */
109 NULL, /* exit thread */
110 NULL, /* exit process */
111 NULL, /* exit master */
112 NGX_MODULE_V1_PADDING
113 };
114
115
116 static void *
117 ngx_mail_core_create_main_conf(ngx_conf_t *cf)
118 {
119 ngx_mail_core_main_conf_t *cmcf;
120
121 cmcf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_core_main_conf_t));
122 if (cmcf == NULL) {
123 return NULL;
124 }
125
126 if (ngx_array_init(&cmcf->servers, cf->pool, 4,
127 sizeof(ngx_mail_core_srv_conf_t *))
128 != NGX_OK)
129 {
130 return NULL;
131 }
132
133 if (ngx_array_init(&cmcf->listen, cf->pool, 4, sizeof(ngx_mail_listen_t))
134 != NGX_OK)
135 {
136 return NULL;
137 }
138
139 return cmcf;
140 }
141
142
143 static void *
144 ngx_mail_core_create_srv_conf(ngx_conf_t *cf)
145 {
146 ngx_mail_core_srv_conf_t *cscf;
147
148 cscf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_core_srv_conf_t));
149 if (cscf == NULL) {
150 return NULL;
151 }
152
153 /*
154 * set by ngx_pcalloc():
155 *
156 * cscf->protocol = NULL;
157 */
158
159 cscf->timeout = NGX_CONF_UNSET_MSEC;
160 cscf->resolver_timeout = NGX_CONF_UNSET_MSEC;
161 cscf->so_keepalive = NGX_CONF_UNSET;
162
163 cscf->resolver = NGX_CONF_UNSET_PTR;
164
165 cscf->file_name = cf->conf_file->file.name.data;
166 cscf->line = cf->conf_file->line;
167
168 return cscf;
169 }
170
171
172 static char *
173 ngx_mail_core_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child)
174 {
175 ngx_mail_core_srv_conf_t *prev = parent;
176 ngx_mail_core_srv_conf_t *conf = child;
177
178 ngx_conf_merge_msec_value(conf->timeout, prev->timeout, 60000);
179 ngx_conf_merge_msec_value(conf->resolver_timeout, prev->resolver_timeout,
180 30000);
181
182 ngx_conf_merge_value(conf->so_keepalive, prev->so_keepalive, 0);
183
184
185 ngx_conf_merge_str_value(conf->server_name, prev->server_name, "");
186
187 if (conf->server_name.len == 0) {
188 conf->server_name = cf->cycle->hostname;
189 }
190
191 if (conf->protocol == NULL) {
192 ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
193 "unknown mail protocol for server in %s:%ui",
194 conf->file_name, conf->line);
195 return NGX_CONF_ERROR;
196 }
197
198 ngx_conf_merge_ptr_value(conf->resolver, prev->resolver, NULL);
199
200 return NGX_CONF_OK;
201 }
202
203
204 static char *
205 ngx_mail_core_server(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
206 {
207 char *rv;
208 void *mconf;
209 ngx_uint_t m;
210 ngx_conf_t pcf;
211 ngx_mail_module_t *module;
212 ngx_mail_conf_ctx_t *ctx, *mail_ctx;
213 ngx_mail_core_srv_conf_t *cscf, **cscfp;
214 ngx_mail_core_main_conf_t *cmcf;
215
216 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_mail_conf_ctx_t));
217 if (ctx == NULL) {
218 return NGX_CONF_ERROR;
219 }
220
221 mail_ctx = cf->ctx;
222 ctx->main_conf = mail_ctx->main_conf;
223
224 /* the server{}'s srv_conf */
225
226 ctx->srv_conf = ngx_pcalloc(cf->pool, sizeof(void *) * ngx_mail_max_module);
227 if (ctx->srv_conf == NULL) {
228 return NGX_CONF_ERROR;
229 }
230
231 for (m = 0; ngx_modules[m]; m++) {
232 if (ngx_modules[m]->type != NGX_MAIL_MODULE) {
233 continue;
234 }
235
236 module = ngx_modules[m]->ctx;
237
238 if (module->create_srv_conf) {
239 mconf = module->create_srv_conf(cf);
240 if (mconf == NULL) {
241 return NGX_CONF_ERROR;
242 }
243
244 ctx->srv_conf[ngx_modules[m]->ctx_index] = mconf;
245 }
246 }
247
248 /* the server configuration context */
249
250 cscf = ctx->srv_conf[ngx_mail_core_module.ctx_index];
251 cscf->ctx = ctx;
252
253 cmcf = ctx->main_conf[ngx_mail_core_module.ctx_index];
254
255 cscfp = ngx_array_push(&cmcf->servers);
256 if (cscfp == NULL) {
257 return NGX_CONF_ERROR;
258 }
259
260 *cscfp = cscf;
261
262
263 /* parse inside server{} */
264
265 pcf = *cf;
266 cf->ctx = ctx;
267 cf->cmd_type = NGX_MAIL_SRV_CONF;
268
269 rv = ngx_conf_parse(cf, NULL);
270
271 *cf = pcf;
272
273 return rv;
274 }
275
276
277 static char *
278 ngx_mail_core_listen(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
279 {
280 ngx_mail_core_srv_conf_t *cscf = conf;
281
282 size_t len, off;
283 in_port_t port;
284 ngx_str_t *value;
285 ngx_url_t u;
286 ngx_uint_t i, m;
287 struct sockaddr *sa;
288 ngx_mail_listen_t *ls;
289 ngx_mail_module_t *module;
290 struct sockaddr_in *sin;
291 ngx_mail_core_main_conf_t *cmcf;
292 #if (NGX_HAVE_INET6)
293 struct sockaddr_in6 *sin6;
294 #endif
295
296 value = cf->args->elts;
297
298 ngx_memzero(&u, sizeof(ngx_url_t));
299
300 u.url = value[1];
301 u.listen = 1;
302
303 if (ngx_parse_url(cf->pool, &u) != NGX_OK) {
304 if (u.err) {
305 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
306 "%s in \"%V\" of the \"listen\" directive",
307 u.err, &u.url);
308 }
309
310 return NGX_CONF_ERROR;
311 }
312
313 cmcf = ngx_mail_conf_get_module_main_conf(cf, ngx_mail_core_module);
314
315 ls = cmcf->listen.elts;
316
317 for (i = 0; i < cmcf->listen.nelts; i++) {
318
319 sa = (struct sockaddr *) ls[i].sockaddr;
320
321 if (sa->sa_family != u.family) {
322 continue;
323 }
324
325 switch (sa->sa_family) {
326
327 #if (NGX_HAVE_INET6)
328 case AF_INET6:
329 off = offsetof(struct sockaddr_in6, sin6_addr);
330 len = 16;
331 sin6 = (struct sockaddr_in6 *) sa;
332 port = sin6->sin6_port;
333 break;
334 #endif
335
336 default: /* AF_INET */
337 off = offsetof(struct sockaddr_in, sin_addr);
338 len = 4;
339 sin = (struct sockaddr_in *) sa;
340 port = sin->sin_port;
341 break;
342 }
343
344 if (ngx_memcmp(ls[i].sockaddr + off, u.sockaddr + off, len) != 0) {
345 continue;
346 }
347
348 if (port != u.port) {
349 continue;
350 }
351
352 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
353 "duplicate \"%V\" address and port pair", &u.url);
354 return NGX_CONF_ERROR;
355 }
356
357 ls = ngx_array_push(&cmcf->listen);
358 if (ls == NULL) {
359 return NGX_CONF_ERROR;
360 }
361
362 ngx_memzero(ls, sizeof(ngx_mail_listen_t));
363
364 ngx_memcpy(ls->sockaddr, u.sockaddr, u.socklen);
365
366 ls->socklen = u.socklen;
367 ls->wildcard = u.wildcard;
368 ls->ctx = cf->ctx;
369
370 for (m = 0; ngx_modules[m]; m++) {
371 if (ngx_modules[m]->type != NGX_MAIL_MODULE) {
372 continue;
373 }
374
375 module = ngx_modules[m]->ctx;
376
377 if (module->protocol == NULL) {
378 continue;
379 }
380
381 for (i = 0; module->protocol->port[i]; i++) {
382 if (module->protocol->port[i] == u.port) {
383 cscf->protocol = module->protocol;
384 break;
385 }
386 }
387 }
388
389 for (i = 2; i < cf->args->nelts; i++) {
390
391 if (ngx_strcmp(value[i].data, "bind") == 0) {
392 ls->bind = 1;
393 continue;
394 }
395
396 if (ngx_strncmp(value[i].data, "ipv6only=o", 10) == 0) {
397 #if (NGX_HAVE_INET6 && defined IPV6_V6ONLY)
398 struct sockaddr *sa;
399 u_char buf[NGX_SOCKADDR_STRLEN];
400
401 sa = (struct sockaddr *) ls->sockaddr;
402
403 if (sa->sa_family == AF_INET6) {
404
405 if (ngx_strcmp(&value[i].data[10], "n") == 0) {
406 ls->ipv6only = 1;
407
408 } else if (ngx_strcmp(&value[i].data[10], "ff") == 0) {
409 ls->ipv6only = 2;
410
411 } else {
412 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
413 "invalid ipv6only flags \"%s\"",
414 &value[i].data[9]);
415 return NGX_CONF_ERROR;
416 }
417
418 ls->bind = 1;
419
420 } else {
421 len = ngx_sock_ntop(sa, buf, NGX_SOCKADDR_STRLEN, 1);
422
423 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
424 "ipv6only is not supported "
425 "on addr \"%*s\", ignored", len, buf);
426 }
427
428 continue;
429 #else
430 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
431 "bind ipv6only is not supported "
432 "on this platform");
433 return NGX_CONF_ERROR;
434 #endif
435 }
436
437 if (ngx_strcmp(value[i].data, "ssl") == 0) {
438 #if (NGX_MAIL_SSL)
439 ls->ssl = 1;
440 continue;
441 #else
442 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
443 "the \"ssl\" parameter requires "
444 "ngx_mail_ssl_module");
445 return NGX_CONF_ERROR;
446 #endif
447 }
448
449 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
450 "the invalid \"%V\" parameter", &value[i]);
451 return NGX_CONF_ERROR;
452 }
453
454 return NGX_CONF_OK;
455 }
456
457
458 static char *
459 ngx_mail_core_protocol(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
460 {
461 ngx_mail_core_srv_conf_t *cscf = conf;
462
463 ngx_str_t *value;
464 ngx_uint_t m;
465 ngx_mail_module_t *module;
466
467 value = cf->args->elts;
468
469 for (m = 0; ngx_modules[m]; m++) {
470 if (ngx_modules[m]->type != NGX_MAIL_MODULE) {
471 continue;
472 }
473
474 module = ngx_modules[m]->ctx;
475
476 if (module->protocol
477 && ngx_strcmp(module->protocol->name.data, value[1].data) == 0)
478 {
479 cscf->protocol = module->protocol;
480
481 return NGX_CONF_OK;
482 }
483 }
484
485 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
486 "unknown protocol \"%V\"", &value[1]);
487 return NGX_CONF_ERROR;
488 }
489
490
491 static char *
492 ngx_mail_core_resolver(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
493 {
494 ngx_mail_core_srv_conf_t *cscf = conf;
495
496 ngx_url_t u;
497 ngx_str_t *value;
498
499 value = cf->args->elts;
500
501 if (cscf->resolver != NGX_CONF_UNSET_PTR) {
502 return "is duplicate";
503 }
504
505 if (ngx_strcmp(value[1].data, "off") == 0) {
506 cscf->resolver = NULL;
507 return NGX_CONF_OK;
508 }
509
510 ngx_memzero(&u, sizeof(ngx_url_t));
511
512 u.host = value[1];
513 u.port = 53;
514
515 if (ngx_inet_resolve_host(cf->pool, &u) != NGX_OK) {
516 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "%V: %s", &u.host, u.err);
517 return NGX_CONF_ERROR;
518 }
519
520 cscf->resolver = ngx_resolver_create(cf, &u.addrs[0]);
521 if (cscf->resolver == NULL) {
522 return NGX_CONF_OK;
523 }
524
525 return NGX_CONF_OK;
526 }
527
528
529 char *
530 ngx_mail_capabilities(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
531 {
532 char *p = conf;
533
534 ngx_str_t *c, *value;
535 ngx_uint_t i;
536 ngx_array_t *a;
537
538 a = (ngx_array_t *) (p + cmd->offset);
539
540 value = cf->args->elts;
541
542 for (i = 1; i < cf->args->nelts; i++) {
543 c = ngx_array_push(a);
544 if (c == NULL) {
545 return NGX_CONF_ERROR;
546 }
547
548 *c = value[i];
549 }
550
551 return NGX_CONF_OK;
552 }
553
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