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290
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_event.h>
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10 #include <ngx_mail.h>
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11
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12
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13 static char *ngx_mail_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
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302
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14 static int ngx_mail_cmp_conf_in_addrs(const void *one, const void *two);
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290
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15
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16
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17 ngx_uint_t ngx_mail_max_module;
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18
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19
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20 static ngx_command_t ngx_mail_commands[] = {
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21
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22 { ngx_string("mail"),
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23 NGX_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS,
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24 ngx_mail_block,
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25 0,
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26 0,
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27 NULL },
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28
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29 { ngx_string("imap"),
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30 NGX_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS,
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31 ngx_mail_block,
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32 0,
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33 0,
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34 NULL },
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35
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36 ngx_null_command
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37 };
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38
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39
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40 static ngx_core_module_t ngx_mail_module_ctx = {
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41 ngx_string("mail"),
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42 NULL,
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43 NULL
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44 };
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45
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46
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47 ngx_module_t ngx_mail_module = {
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48 NGX_MODULE_V1,
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49 &ngx_mail_module_ctx, /* module context */
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50 ngx_mail_commands, /* module directives */
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51 NGX_CORE_MODULE, /* module type */
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52 NULL, /* init master */
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53 NULL, /* init module */
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54 NULL, /* init process */
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55 NULL, /* init thread */
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56 NULL, /* exit thread */
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57 NULL, /* exit process */
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58 NULL, /* exit master */
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59 NGX_MODULE_V1_PADDING
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60 };
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61
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62
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63 static char *
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64 ngx_mail_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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65 {
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66 char *rv;
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67 u_char *text;
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68 size_t len;
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69 ngx_uint_t i, a, l, m, mi, s, p, last, bind_all, done;
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70 ngx_conf_t pcf;
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71 ngx_array_t in_ports;
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72 ngx_listening_t *ls;
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73 ngx_mail_listen_t *imls;
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74 ngx_mail_module_t *module;
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75 ngx_mail_in_port_t *imip;
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76 ngx_mail_conf_ctx_t *ctx;
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77 ngx_mail_conf_in_port_t *in_port;
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78 ngx_mail_conf_in_addr_t *in_addr;
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79 ngx_mail_core_srv_conf_t **cscfp;
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80 ngx_mail_core_main_conf_t *cmcf;
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81
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82 if (cmd->name.data[0] == 'i') {
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83 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
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84 "the \"imap\" directive is deprecated, "
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85 "use the \"mail\" directive instead");
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86 }
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87
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88 /* the main mail context */
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89
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90 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_mail_conf_ctx_t));
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91 if (ctx == NULL) {
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92 return NGX_CONF_ERROR;
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93 }
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94
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95 *(ngx_mail_conf_ctx_t **) conf = ctx;
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96
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97 /* count the number of the http modules and set up their indices */
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98
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99 ngx_mail_max_module = 0;
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100 for (m = 0; ngx_modules[m]; m++) {
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101 if (ngx_modules[m]->type != NGX_MAIL_MODULE) {
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102 continue;
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103 }
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104
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105 ngx_modules[m]->ctx_index = ngx_mail_max_module++;
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106 }
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107
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108
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109 /* the mail main_conf context, it is the same in the all mail contexts */
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110
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111 ctx->main_conf = ngx_pcalloc(cf->pool,
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112 sizeof(void *) * ngx_mail_max_module);
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113 if (ctx->main_conf == NULL) {
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114 return NGX_CONF_ERROR;
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115 }
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116
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117
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118 /*
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119 * the mail null srv_conf context, it is used to merge
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120 * the server{}s' srv_conf's
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121 */
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122
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123 ctx->srv_conf = ngx_pcalloc(cf->pool, sizeof(void *) * ngx_mail_max_module);
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124 if (ctx->srv_conf == NULL) {
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125 return NGX_CONF_ERROR;
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126 }
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127
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128
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129 /*
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130 * create the main_conf's, the null srv_conf's, and the null loc_conf's
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131 * of the all mail modules
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132 */
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133
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134 for (m = 0; ngx_modules[m]; m++) {
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135 if (ngx_modules[m]->type != NGX_MAIL_MODULE) {
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136 continue;
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137 }
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138
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139 module = ngx_modules[m]->ctx;
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140 mi = ngx_modules[m]->ctx_index;
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141
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142 if (module->create_main_conf) {
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143 ctx->main_conf[mi] = module->create_main_conf(cf);
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144 if (ctx->main_conf[mi] == NULL) {
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145 return NGX_CONF_ERROR;
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146 }
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147 }
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148
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149 if (module->create_srv_conf) {
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150 ctx->srv_conf[mi] = module->create_srv_conf(cf);
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151 if (ctx->srv_conf[mi] == NULL) {
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152 return NGX_CONF_ERROR;
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153 }
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154 }
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155 }
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156
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157
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158 /* parse inside the mail{} block */
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159
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160 pcf = *cf;
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161 cf->ctx = ctx;
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162
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163 cf->module_type = NGX_MAIL_MODULE;
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164 cf->cmd_type = NGX_MAIL_MAIN_CONF;
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165 rv = ngx_conf_parse(cf, NULL);
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166
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167 if (rv != NGX_CONF_OK) {
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168 *cf = pcf;
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169 return rv;
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170 }
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171
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172
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173 /* init mail{} main_conf's, merge the server{}s' srv_conf's */
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174
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175 cmcf = ctx->main_conf[ngx_mail_core_module.ctx_index];
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176 cscfp = cmcf->servers.elts;
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177
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178 for (m = 0; ngx_modules[m]; m++) {
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179 if (ngx_modules[m]->type != NGX_MAIL_MODULE) {
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180 continue;
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181 }
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182
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183 module = ngx_modules[m]->ctx;
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184 mi = ngx_modules[m]->ctx_index;
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185
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186 /* init mail{} main_conf's */
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187
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188 if (module->init_main_conf) {
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189 rv = module->init_main_conf(cf, ctx->main_conf[mi]);
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190 if (rv != NGX_CONF_OK) {
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191 *cf = pcf;
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192 return rv;
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193 }
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194 }
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195
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196 for (s = 0; s < cmcf->servers.nelts; s++) {
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197
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198 /* merge the server{}s' srv_conf's */
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199
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200 if (module->merge_srv_conf) {
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201 rv = module->merge_srv_conf(cf,
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202 ctx->srv_conf[mi],
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203 cscfp[s]->ctx->srv_conf[mi]);
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204 if (rv != NGX_CONF_OK) {
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205 *cf = pcf;
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206 return rv;
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207 }
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208 }
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209 }
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210 }
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211
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212 /* mail{}'s cf->ctx was needed while the configuration merging */
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213
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214 *cf = pcf;
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215
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216
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217 if (ngx_array_init(&in_ports, cf->temp_pool, 4,
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218 sizeof(ngx_mail_conf_in_port_t))
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219 != NGX_OK)
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220 {
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221 return NGX_CONF_ERROR;
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222 }
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223
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224 imls = cmcf->listen.elts;
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225
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226 for (l = 0; l < cmcf->listen.nelts; l++) {
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227
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228 /* AF_INET only */
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229
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230 in_port = in_ports.elts;
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231 for (p = 0; p < in_ports.nelts; p++) {
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232 if (in_port[p].port == imls[l].port) {
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233 in_port = &in_port[p];
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234 goto found;
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235 }
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236 }
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237
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238 in_port = ngx_array_push(&in_ports);
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239 if (in_port == NULL) {
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240 return NGX_CONF_ERROR;
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241 }
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242
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243 in_port->port = imls[l].port;
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244
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245 if (ngx_array_init(&in_port->addrs, cf->temp_pool, 2,
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246 sizeof(ngx_mail_conf_in_addr_t))
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247 != NGX_OK)
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248 {
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249 return NGX_CONF_ERROR;
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250 }
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251
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252 found:
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253
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254 in_addr = ngx_array_push(&in_port->addrs);
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255 if (in_addr == NULL) {
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256 return NGX_CONF_ERROR;
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257 }
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258
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259 in_addr->addr = imls[l].addr;
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260 in_addr->ctx = imls[l].ctx;
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261 in_addr->bind = imls[l].bind;
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262 }
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263
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264 /* optimize the lists of ports and addresses */
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265
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266 /* AF_INET only */
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267
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268 in_port = in_ports.elts;
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269 for (p = 0; p < in_ports.nelts; p++) {
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270
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302
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271 ngx_sort(in_port[p].addrs.elts, (size_t) in_port[p].addrs.nelts,
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272 sizeof(ngx_mail_conf_in_addr_t), ngx_mail_cmp_conf_in_addrs);
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290
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273
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274 in_addr = in_port[p].addrs.elts;
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275 last = in_port[p].addrs.nelts;
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276
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277 /*
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278 * if there is the binding to the "*:port" then we need to bind()
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279 * to the "*:port" only and ignore the other bindings
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280 */
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281
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282 if (in_addr[last - 1].addr == INADDR_ANY) {
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283 in_addr[last - 1].bind = 1;
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284 bind_all = 0;
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285
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286 } else {
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287 bind_all = 1;
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288 }
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289
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290 for (a = 0; a < last; /* void */ ) {
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291
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292 if (!bind_all && !in_addr[a].bind) {
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293 a++;
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294 continue;
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295 }
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296
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297 ls = ngx_listening_inet_stream_socket(cf, in_addr[a].addr,
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298 in_port[p].port);
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299 if (ls == NULL) {
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300 return NGX_CONF_ERROR;
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301 }
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302
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326
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303 ls->backlog = NGX_LISTEN_BACKLOG;
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290
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304 ls->rcvbuf = -1;
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305 ls->sndbuf = -1;
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306
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307 ls->addr_ntop = 1;
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308 ls->handler = ngx_mail_init_connection;
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309 ls->pool_size = 256;
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310
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311 /* STUB */
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312 ls->log = *cf->cycle->new_log;
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313 ls->log.data = &ls->addr_text;
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314 ls->log.handler = ngx_accept_log_error;
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315 /**/
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316
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317 imip = ngx_palloc(cf->pool, sizeof(ngx_mail_in_port_t));
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318 if (imip == NULL) {
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319 return NGX_CONF_ERROR;
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320 }
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321
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322 ls->servers = imip;
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323
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324 in_addr = in_port[p].addrs.elts;
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325
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326 if (in_addr[a].bind && in_addr[a].addr != INADDR_ANY) {
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327 imip->naddrs = 1;
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328 done = 0;
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329
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330 } else if (in_port[p].addrs.nelts > 1
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331 && in_addr[last - 1].addr == INADDR_ANY)
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332 {
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333 imip->naddrs = last;
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334 done = 1;
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335
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336 } else {
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337 imip->naddrs = 1;
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338 done = 0;
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339 }
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340
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341 #if 0
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342 ngx_log_error(NGX_LOG_ALERT, cf->log, 0,
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343 "%ui: %V %d %ui %ui",
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344 a, &ls->addr_text, in_addr[a].bind,
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345 imip->naddrs, last);
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346 #endif
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347
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348 imip->addrs = ngx_pcalloc(cf->pool,
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349 imip->naddrs * sizeof(ngx_mail_in_addr_t));
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350 if (imip->addrs == NULL) {
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351 return NGX_CONF_ERROR;
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352 }
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353
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354 for (i = 0; i < imip->naddrs; i++) {
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355 imip->addrs[i].addr = in_addr[i].addr;
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356 imip->addrs[i].ctx = in_addr[i].ctx;
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357
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358 text = ngx_palloc(cf->pool,
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359 INET_ADDRSTRLEN - 1 + sizeof(":65535") - 1);
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360 if (text == NULL) {
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361 return NGX_CONF_ERROR;
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362 }
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363
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364 len = ngx_inet_ntop(AF_INET, &in_addr[i].addr, text,
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365 INET_ADDRSTRLEN);
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366
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367 len = ngx_sprintf(text + len, ":%d", in_port[p].port) - text;
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368
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369 imip->addrs[i].addr_text.len = len;
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370 imip->addrs[i].addr_text.data = text;
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371 }
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372
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373 if (done) {
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374 break;
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375 }
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376
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377 in_addr++;
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378 in_port[p].addrs.elts = in_addr;
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379 last--;
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380
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381 a = 0;
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382 }
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383 }
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384
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385 return NGX_CONF_OK;
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386 }
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387
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388
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302
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389 static int
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290
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390 ngx_mail_cmp_conf_in_addrs(const void *one, const void *two)
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391 {
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392 ngx_mail_conf_in_addr_t *first, *second;
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393
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394 first = (ngx_mail_conf_in_addr_t *) one;
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395 second = (ngx_mail_conf_in_addr_t *) two;
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396
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397 if (first->addr == INADDR_ANY) {
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398 /* the INADDR_ANY must be the last resort, shift it to the end */
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399 return 1;
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400 }
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401
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402 if (first->bind && !second->bind) {
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403 /* shift explicit bind()ed addresses to the start */
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404 return -1;
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405 }
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406
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407 if (!first->bind && second->bind) {
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408 /* shift explicit bind()ed addresses to the start */
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409 return 1;
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410 }
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411
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412 /* do not sort by default */
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413
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414 return 0;
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415 }
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