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