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 char *ngx_mail_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
14 static int ngx_mail_cmp_conf_in_addrs(const void *one, const void *two);
15
16
17 ngx_uint_t ngx_mail_max_module;
18
19
20 static ngx_command_t ngx_mail_commands[] = {
21
22 { ngx_string("mail"),
23 NGX_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS,
24 ngx_mail_block,
25 0,
26 0,
27 NULL },
28
29 { ngx_string("imap"),
30 NGX_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS,
31 ngx_mail_block,
32 0,
33 0,
34 NULL },
35
36 ngx_null_command
37 };
38
39
40 static ngx_core_module_t ngx_mail_module_ctx = {
41 ngx_string("mail"),
42 NULL,
43 NULL
44 };
45
46
47 ngx_module_t ngx_mail_module = {
48 NGX_MODULE_V1,
49 &ngx_mail_module_ctx, /* module context */
50 ngx_mail_commands, /* module directives */
51 NGX_CORE_MODULE, /* module type */
52 NULL, /* init master */
53 NULL, /* init module */
54 NULL, /* init process */
55 NULL, /* init thread */
56 NULL, /* exit thread */
57 NULL, /* exit process */
58 NULL, /* exit master */
59 NGX_MODULE_V1_PADDING
60 };
61
62
63 static char *
64 ngx_mail_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
65 {
66 char *rv;
67 u_char *text;
68 size_t len;
69 ngx_uint_t i, a, l, m, mi, s, p, last, bind_all, done;
70 ngx_conf_t pcf;
71 ngx_array_t in_ports;
72 ngx_listening_t *ls;
73 ngx_mail_listen_t *imls;
74 ngx_mail_module_t *module;
75 ngx_mail_in_port_t *imip;
76 ngx_mail_conf_ctx_t *ctx;
77 ngx_mail_conf_in_port_t *in_port;
78 ngx_mail_conf_in_addr_t *in_addr;
79 ngx_mail_core_srv_conf_t **cscfp;
80 ngx_mail_core_main_conf_t *cmcf;
81
82 if (cmd->name.data[0] == 'i') {
83 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
84 "the \"imap\" directive is deprecated, "
85 "use the \"mail\" directive instead");
86 }
87
88 /* the main mail context */
89
90 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_mail_conf_ctx_t));
91 if (ctx == NULL) {
92 return NGX_CONF_ERROR;
93 }
94
95 *(ngx_mail_conf_ctx_t **) conf = ctx;
96
97 /* count the number of the http modules and set up their indices */
98
99 ngx_mail_max_module = 0;
100 for (m = 0; ngx_modules[m]; m++) {
101 if (ngx_modules[m]->type != NGX_MAIL_MODULE) {
102 continue;
103 }
104
105 ngx_modules[m]->ctx_index = ngx_mail_max_module++;
106 }
107
108
109 /* the mail main_conf context, it is the same in the all mail contexts */
110
111 ctx->main_conf = ngx_pcalloc(cf->pool,
112 sizeof(void *) * ngx_mail_max_module);
113 if (ctx->main_conf == NULL) {
114 return NGX_CONF_ERROR;
115 }
116
117
118 /*
119 * the mail null srv_conf context, it is used to merge
120 * the server{}s' srv_conf's
121 */
122
123 ctx->srv_conf = ngx_pcalloc(cf->pool, sizeof(void *) * ngx_mail_max_module);
124 if (ctx->srv_conf == NULL) {
125 return NGX_CONF_ERROR;
126 }
127
128
129 /*
130 * create the main_conf's, the null srv_conf's, and the null loc_conf's
131 * of the all mail modules
132 */
133
134 for (m = 0; ngx_modules[m]; m++) {
135 if (ngx_modules[m]->type != NGX_MAIL_MODULE) {
136 continue;
137 }
138
139 module = ngx_modules[m]->ctx;
140 mi = ngx_modules[m]->ctx_index;
141
142 if (module->create_main_conf) {
143 ctx->main_conf[mi] = module->create_main_conf(cf);
144 if (ctx->main_conf[mi] == NULL) {
145 return NGX_CONF_ERROR;
146 }
147 }
148
149 if (module->create_srv_conf) {
150 ctx->srv_conf[mi] = module->create_srv_conf(cf);
151 if (ctx->srv_conf[mi] == NULL) {
152 return NGX_CONF_ERROR;
153 }
154 }
155 }
156
157
158 /* parse inside the mail{} block */
159
160 pcf = *cf;
161 cf->ctx = ctx;
162
163 cf->module_type = NGX_MAIL_MODULE;
164 cf->cmd_type = NGX_MAIL_MAIN_CONF;
165 rv = ngx_conf_parse(cf, NULL);
166
167 if (rv != NGX_CONF_OK) {
168 *cf = pcf;
169 return rv;
170 }
171
172
173 /* init mail{} main_conf's, merge the server{}s' srv_conf's */
174
175 cmcf = ctx->main_conf[ngx_mail_core_module.ctx_index];
176 cscfp = cmcf->servers.elts;
177
178 for (m = 0; ngx_modules[m]; m++) {
179 if (ngx_modules[m]->type != NGX_MAIL_MODULE) {
180 continue;
181 }
182
183 module = ngx_modules[m]->ctx;
184 mi = ngx_modules[m]->ctx_index;
185
186 /* init mail{} main_conf's */
187
188 cf->ctx = ctx;
189
190 if (module->init_main_conf) {
191 rv = module->init_main_conf(cf, ctx->main_conf[mi]);
192 if (rv != NGX_CONF_OK) {
193 *cf = pcf;
194 return rv;
195 }
196 }
197
198 for (s = 0; s < cmcf->servers.nelts; s++) {
199
200 /* merge the server{}s' srv_conf's */
201
202 cf->ctx = cscfp[s]->ctx;
203
204 if (module->merge_srv_conf) {
205 rv = module->merge_srv_conf(cf,
206 ctx->srv_conf[mi],
207 cscfp[s]->ctx->srv_conf[mi]);
208 if (rv != NGX_CONF_OK) {
209 *cf = pcf;
210 return rv;
211 }
212 }
213 }
214 }
215
216 *cf = pcf;
217
218
219 if (ngx_array_init(&in_ports, cf->temp_pool, 4,
220 sizeof(ngx_mail_conf_in_port_t))
221 != NGX_OK)
222 {
223 return NGX_CONF_ERROR;
224 }
225
226 imls = cmcf->listen.elts;
227
228 for (l = 0; l < cmcf->listen.nelts; l++) {
229
230 /* AF_INET only */
231
232 in_port = in_ports.elts;
233 for (p = 0; p < in_ports.nelts; p++) {
234 if (in_port[p].port == imls[l].port) {
235 in_port = &in_port[p];
236 goto found;
237 }
238 }
239
240 in_port = ngx_array_push(&in_ports);
241 if (in_port == NULL) {
242 return NGX_CONF_ERROR;
243 }
244
245 in_port->port = imls[l].port;
246
247 if (ngx_array_init(&in_port->addrs, cf->temp_pool, 2,
248 sizeof(ngx_mail_conf_in_addr_t))
249 != NGX_OK)
250 {
251 return NGX_CONF_ERROR;
252 }
253
254 found:
255
256 in_addr = ngx_array_push(&in_port->addrs);
257 if (in_addr == NULL) {
258 return NGX_CONF_ERROR;
259 }
260
261 in_addr->addr = imls[l].addr;
262 in_addr->ctx = imls[l].ctx;
263 in_addr->bind = imls[l].bind;
264 }
265
266 /* optimize the lists of ports and addresses */
267
268 /* AF_INET only */
269
270 in_port = in_ports.elts;
271 for (p = 0; p < in_ports.nelts; p++) {
272
273 ngx_sort(in_port[p].addrs.elts, (size_t) in_port[p].addrs.nelts,
274 sizeof(ngx_mail_conf_in_addr_t), ngx_mail_cmp_conf_in_addrs);
275
276 in_addr = in_port[p].addrs.elts;
277 last = in_port[p].addrs.nelts;
278
279 /*
280 * if there is the binding to the "*:port" then we need to bind()
281 * to the "*:port" only and ignore the other bindings
282 */
283
284 if (in_addr[last - 1].addr == INADDR_ANY) {
285 in_addr[last - 1].bind = 1;
286 bind_all = 0;
287
288 } else {
289 bind_all = 1;
290 }
291
292 for (a = 0; a < last; /* void */ ) {
293
294 if (!bind_all && !in_addr[a].bind) {
295 a++;
296 continue;
297 }
298
299 ls = ngx_listening_inet_stream_socket(cf, in_addr[a].addr,
300 in_port[p].port);
301 if (ls == NULL) {
302 return NGX_CONF_ERROR;
303 }
304
305 ls->backlog = NGX_LISTEN_BACKLOG;
306 ls->rcvbuf = -1;
307 ls->sndbuf = -1;
308
309 ls->addr_ntop = 1;
310 ls->handler = ngx_mail_init_connection;
311 ls->pool_size = 256;
312
313 /* STUB */
314 ls->log = *cf->cycle->new_log;
315 ls->log.data = &ls->addr_text;
316 ls->log.handler = ngx_accept_log_error;
317 /**/
318
319 imip = ngx_palloc(cf->pool, sizeof(ngx_mail_in_port_t));
320 if (imip == NULL) {
321 return NGX_CONF_ERROR;
322 }
323
324 ls->servers = imip;
325
326 in_addr = in_port[p].addrs.elts;
327
328 if (in_addr[a].bind && in_addr[a].addr != INADDR_ANY) {
329 imip->naddrs = 1;
330 done = 0;
331
332 } else if (in_port[p].addrs.nelts > 1
333 && in_addr[last - 1].addr == INADDR_ANY)
334 {
335 imip->naddrs = last;
336 done = 1;
337
338 } else {
339 imip->naddrs = 1;
340 done = 0;
341 }
342
343 #if 0
344 ngx_log_error(NGX_LOG_ALERT, cf->log, 0,
345 "%ui: %V %d %ui %ui",
346 a, &ls->addr_text, in_addr[a].bind,
347 imip->naddrs, last);
348 #endif
349
350 imip->addrs = ngx_pcalloc(cf->pool,
351 imip->naddrs * sizeof(ngx_mail_in_addr_t));
352 if (imip->addrs == NULL) {
353 return NGX_CONF_ERROR;
354 }
355
356 for (i = 0; i < imip->naddrs; i++) {
357 imip->addrs[i].addr = in_addr[i].addr;
358 imip->addrs[i].ctx = in_addr[i].ctx;
359
360 text = ngx_palloc(cf->pool,
361 INET_ADDRSTRLEN - 1 + sizeof(":65535") - 1);
362 if (text == NULL) {
363 return NGX_CONF_ERROR;
364 }
365
366 len = ngx_inet_ntop(AF_INET, &in_addr[i].addr, text,
367 INET_ADDRSTRLEN);
368
369 len = ngx_sprintf(text + len, ":%d", in_port[p].port) - text;
370
371 imip->addrs[i].addr_text.len = len;
372 imip->addrs[i].addr_text.data = text;
373 }
374
375 if (done) {
376 break;
377 }
378
379 in_addr++;
380 in_port[p].addrs.elts = in_addr;
381 last--;
382
383 a = 0;
384 }
385 }
386
387 return NGX_CONF_OK;
388 }
389
390
391 static int
392 ngx_mail_cmp_conf_in_addrs(const void *one, const void *two)
393 {
394 ngx_mail_conf_in_addr_t *first, *second;
395
396 first = (ngx_mail_conf_in_addr_t *) one;
397 second = (ngx_mail_conf_in_addr_t *) two;
398
399 if (first->addr == INADDR_ANY) {
400 /* the INADDR_ANY must be the last resort, shift it to the end */
401 return 1;
402 }
403
404 if (first->bind && !second->bind) {
405 /* shift explicit bind()ed addresses to the start */
406 return -1;
407 }
408
409 if (!first->bind && second->bind) {
410 /* shift explicit bind()ed addresses to the start */
411 return 1;
412 }
413
414 /* do not sort by default */
415
416 return 0;
417 }
418
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