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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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492
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14 static ngx_int_t ngx_mail_add_ports(ngx_conf_t *cf, ngx_array_t *ports,
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15 ngx_mail_listen_t *listen);
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16 static char *ngx_mail_optimize_servers(ngx_conf_t *cf, ngx_array_t *ports);
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17 static ngx_int_t ngx_mail_add_addrs(ngx_conf_t *cf, ngx_mail_port_t *mport,
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18 ngx_mail_conf_addr_t *addr);
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19 #if (NGX_HAVE_INET6)
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20 static ngx_int_t ngx_mail_add_addrs6(ngx_conf_t *cf, ngx_mail_port_t *mport,
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21 ngx_mail_conf_addr_t *addr);
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22 #endif
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23 static ngx_int_t ngx_mail_cmp_conf_addrs(const void *one, const void *two);
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290
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24
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25
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26 ngx_uint_t ngx_mail_max_module;
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27
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28
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29 static ngx_command_t ngx_mail_commands[] = {
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30
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31 { ngx_string("mail"),
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32 NGX_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS,
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33 ngx_mail_block,
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34 0,
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35 0,
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36 NULL },
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37
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38 { ngx_string("imap"),
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39 NGX_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS,
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40 ngx_mail_block,
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41 0,
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42 0,
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43 NULL },
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44
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45 ngx_null_command
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46 };
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47
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48
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49 static ngx_core_module_t ngx_mail_module_ctx = {
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50 ngx_string("mail"),
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51 NULL,
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52 NULL
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53 };
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54
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55
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56 ngx_module_t ngx_mail_module = {
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57 NGX_MODULE_V1,
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58 &ngx_mail_module_ctx, /* module context */
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59 ngx_mail_commands, /* module directives */
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60 NGX_CORE_MODULE, /* module type */
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61 NULL, /* init master */
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62 NULL, /* init module */
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63 NULL, /* init process */
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64 NULL, /* init thread */
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65 NULL, /* exit thread */
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66 NULL, /* exit process */
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67 NULL, /* exit master */
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68 NGX_MODULE_V1_PADDING
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69 };
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70
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71
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72 static char *
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73 ngx_mail_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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74 {
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75 char *rv;
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492
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76 ngx_uint_t i, m, mi, s;
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290
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77 ngx_conf_t pcf;
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492
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78 ngx_array_t ports;
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79 ngx_mail_listen_t *listen;
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290
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80 ngx_mail_module_t *module;
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81 ngx_mail_conf_ctx_t *ctx;
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82 ngx_mail_core_srv_conf_t **cscfp;
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83 ngx_mail_core_main_conf_t *cmcf;
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84
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85 if (cmd->name.data[0] == 'i') {
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86 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
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87 "the \"imap\" directive is deprecated, "
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88 "use the \"mail\" directive instead");
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89 }
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90
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91 /* the main mail context */
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92
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93 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_mail_conf_ctx_t));
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94 if (ctx == NULL) {
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95 return NGX_CONF_ERROR;
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96 }
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97
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98 *(ngx_mail_conf_ctx_t **) conf = ctx;
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99
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100 /* count the number of the http modules and set up their indices */
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101
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102 ngx_mail_max_module = 0;
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103 for (m = 0; ngx_modules[m]; m++) {
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104 if (ngx_modules[m]->type != NGX_MAIL_MODULE) {
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105 continue;
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106 }
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107
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108 ngx_modules[m]->ctx_index = ngx_mail_max_module++;
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109 }
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110
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111
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112 /* the mail main_conf context, it is the same in the all mail contexts */
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113
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114 ctx->main_conf = ngx_pcalloc(cf->pool,
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115 sizeof(void *) * ngx_mail_max_module);
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116 if (ctx->main_conf == NULL) {
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117 return NGX_CONF_ERROR;
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118 }
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119
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120
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121 /*
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122 * the mail null srv_conf context, it is used to merge
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123 * the server{}s' srv_conf's
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124 */
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125
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126 ctx->srv_conf = ngx_pcalloc(cf->pool, sizeof(void *) * ngx_mail_max_module);
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127 if (ctx->srv_conf == NULL) {
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128 return NGX_CONF_ERROR;
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129 }
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130
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131
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132 /*
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133 * create the main_conf's, the null srv_conf's, and the null loc_conf's
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134 * of the all mail modules
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135 */
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136
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137 for (m = 0; ngx_modules[m]; m++) {
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138 if (ngx_modules[m]->type != NGX_MAIL_MODULE) {
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139 continue;
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140 }
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141
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142 module = ngx_modules[m]->ctx;
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143 mi = ngx_modules[m]->ctx_index;
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144
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145 if (module->create_main_conf) {
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146 ctx->main_conf[mi] = module->create_main_conf(cf);
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147 if (ctx->main_conf[mi] == NULL) {
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148 return NGX_CONF_ERROR;
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149 }
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150 }
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151
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152 if (module->create_srv_conf) {
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153 ctx->srv_conf[mi] = module->create_srv_conf(cf);
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154 if (ctx->srv_conf[mi] == NULL) {
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155 return NGX_CONF_ERROR;
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156 }
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157 }
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158 }
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159
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160
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161 /* parse inside the mail{} block */
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162
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163 pcf = *cf;
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164 cf->ctx = ctx;
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165
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166 cf->module_type = NGX_MAIL_MODULE;
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167 cf->cmd_type = NGX_MAIL_MAIN_CONF;
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168 rv = ngx_conf_parse(cf, NULL);
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169
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170 if (rv != NGX_CONF_OK) {
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171 *cf = pcf;
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172 return rv;
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173 }
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174
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175
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176 /* init mail{} main_conf's, merge the server{}s' srv_conf's */
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177
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178 cmcf = ctx->main_conf[ngx_mail_core_module.ctx_index];
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179 cscfp = cmcf->servers.elts;
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180
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181 for (m = 0; ngx_modules[m]; m++) {
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182 if (ngx_modules[m]->type != NGX_MAIL_MODULE) {
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183 continue;
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184 }
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185
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186 module = ngx_modules[m]->ctx;
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187 mi = ngx_modules[m]->ctx_index;
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188
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189 /* init mail{} main_conf's */
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190
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336
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191 cf->ctx = ctx;
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192
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290
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193 if (module->init_main_conf) {
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194 rv = module->init_main_conf(cf, ctx->main_conf[mi]);
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195 if (rv != NGX_CONF_OK) {
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196 *cf = pcf;
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197 return rv;
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198 }
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199 }
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200
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201 for (s = 0; s < cmcf->servers.nelts; s++) {
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202
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203 /* merge the server{}s' srv_conf's */
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204
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336
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205 cf->ctx = cscfp[s]->ctx;
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206
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290
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207 if (module->merge_srv_conf) {
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208 rv = module->merge_srv_conf(cf,
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209 ctx->srv_conf[mi],
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210 cscfp[s]->ctx->srv_conf[mi]);
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211 if (rv != NGX_CONF_OK) {
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212 *cf = pcf;
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213 return rv;
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214 }
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215 }
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216 }
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217 }
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218
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219 *cf = pcf;
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220
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221
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492
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222 if (ngx_array_init(&ports, cf->temp_pool, 4, sizeof(ngx_mail_conf_port_t))
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290
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223 != NGX_OK)
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224 {
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225 return NGX_CONF_ERROR;
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226 }
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227
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492
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228 listen = cmcf->listen.elts;
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290
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229
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492
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230 for (i = 0; i < cmcf->listen.nelts; i++) {
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231 if (ngx_mail_add_ports(cf, &ports, &listen[i]) != NGX_OK) {
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290
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232 return NGX_CONF_ERROR;
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233 }
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492
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234 }
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290
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235
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492
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236 return ngx_mail_optimize_servers(cf, &ports);
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237 }
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238
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239
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240 static ngx_int_t
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241 ngx_mail_add_ports(ngx_conf_t *cf, ngx_array_t *ports,
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242 ngx_mail_listen_t *listen)
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243 {
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244 in_port_t p;
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245 ngx_uint_t i;
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246 struct sockaddr *sa;
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247 struct sockaddr_in *sin;
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248 ngx_mail_conf_port_t *port;
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249 ngx_mail_conf_addr_t *addr;
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250 #if (NGX_HAVE_INET6)
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251 struct sockaddr_in6 *sin6;
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252 #endif
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253
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254 sa = (struct sockaddr *) &listen->sockaddr;
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290
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255
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492
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256 switch (sa->sa_family) {
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257
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258 #if (NGX_HAVE_INET6)
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259 case AF_INET6:
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260 sin6 = (struct sockaddr_in6 *) sa;
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261 p = sin6->sin6_port;
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262 break;
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263 #endif
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264
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265 default: /* AF_INET */
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266 sin = (struct sockaddr_in *) sa;
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267 p = sin->sin_port;
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268 break;
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269 }
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270
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271 port = ports->elts;
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272 for (i = 0; i < ports->nelts; i++) {
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273 if (p == port[i].port && sa->sa_family == port[i].family) {
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274
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275 /* a port is already in the port list */
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276
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277 port = &port[i];
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278 goto found;
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290
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279 }
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280 }
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281
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492
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282 /* add a port to the port list */
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283
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284 port = ngx_array_push(ports);
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285 if (port == NULL) {
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286 return NGX_ERROR;
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287 }
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288
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289 port->family = sa->sa_family;
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290 port->port = p;
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290
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291
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492
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292 if (ngx_array_init(&port->addrs, cf->temp_pool, 2,
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293 sizeof(ngx_mail_conf_addr_t))
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294 != NGX_OK)
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295 {
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296 return NGX_ERROR;
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297 }
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298
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299 found:
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300
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301 addr = ngx_array_push(&port->addrs);
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302 if (addr == NULL) {
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303 return NGX_ERROR;
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304 }
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290
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305
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492
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306 addr->sockaddr = (struct sockaddr *) &listen->sockaddr;
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307 addr->socklen = listen->socklen;
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308 addr->ctx = listen->ctx;
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309 addr->bind = listen->bind;
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310 addr->wildcard = listen->wildcard;
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311 #if (NGX_MAIL_SSL)
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312 addr->ssl = listen->ssl;
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313 #endif
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314 #if (NGX_HAVE_INET6 && defined IPV6_V6ONLY)
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315 addr->ipv6only = listen->ipv6only;
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316 #endif
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317
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318 return NGX_OK;
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319 }
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320
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290
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321
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492
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322 static char *
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323 ngx_mail_optimize_servers(ngx_conf_t *cf, ngx_array_t *ports)
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324 {
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325 ngx_uint_t i, p, last, bind_wildcard;
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326 ngx_listening_t *ls;
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327 ngx_mail_port_t *mport;
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328 ngx_mail_conf_port_t *port;
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329 ngx_mail_conf_addr_t *addr;
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290
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330
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492
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331 port = ports->elts;
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332 for (p = 0; p < ports->nelts; p++) {
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333
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334 ngx_sort(port[p].addrs.elts, (size_t) port[p].addrs.nelts,
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335 sizeof(ngx_mail_conf_addr_t), ngx_mail_cmp_conf_addrs);
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336
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337 addr = port[p].addrs.elts;
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338 last = port[p].addrs.nelts;
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290
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339
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340 /*
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341 * if there is the binding to the "*:port" then we need to bind()
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342 * to the "*:port" only and ignore the other bindings
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343 */
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344
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492
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345 if (addr[last - 1].wildcard) {
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346 addr[last - 1].bind = 1;
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347 bind_wildcard = 1;
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290
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348
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349 } else {
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492
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350 bind_wildcard = 0;
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290
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351 }
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352
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492
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353 i = 0;
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290
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354
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492
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355 while (i < last) {
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356
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357 if (bind_wildcard && !addr[i].bind) {
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358 i++;
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290
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359 continue;
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360 }
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361
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492
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362 ls = ngx_create_listening(cf, addr[i].sockaddr, addr[i].socklen);
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290
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363 if (ls == NULL) {
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492
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364 return NGX_CONF_ERROR;
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290
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365 }
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366
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367 ls->addr_ntop = 1;
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368 ls->handler = ngx_mail_init_connection;
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369 ls->pool_size = 256;
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370
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484
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371 /* TODO: error_log directive */
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372 ls->logp = &cf->cycle->new_log;
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290
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373 ls->log.data = &ls->addr_text;
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374 ls->log.handler = ngx_accept_log_error;
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375
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492
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376 #if (NGX_HAVE_INET6 && defined IPV6_V6ONLY)
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377 ls->ipv6only = addr[i].ipv6only;
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378 #endif
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379
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380 mport = ngx_palloc(cf->pool, sizeof(ngx_mail_port_t));
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381 if (mport == NULL) {
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290
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382 return NGX_CONF_ERROR;
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383 }
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384
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492
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385 ls->servers = mport;
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290
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386
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492
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387 if (i == last - 1) {
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388 mport->naddrs = last;
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290
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389
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390 } else {
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492
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391 mport->naddrs = 1;
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392 i = 0;
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290
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393 }
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394
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492
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395 switch (ls->sockaddr->sa_family) {
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396 #if (NGX_HAVE_INET6)
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397 case AF_INET6:
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398 if (ngx_mail_add_addrs6(cf, mport, addr) != NGX_OK) {
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290
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399 return NGX_CONF_ERROR;
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400 }
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492
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401 break;
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404
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402 #endif
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492
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403 default: /* AF_INET */
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404 if (ngx_mail_add_addrs(cf, mport, addr) != NGX_OK) {
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405 return NGX_CONF_ERROR;
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406 }
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290
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407 break;
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408 }
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409
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492
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410 addr++;
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290
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411 last--;
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412 }
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413 }
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414
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415 return NGX_CONF_OK;
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416 }
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417
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418
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372
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419 static ngx_int_t
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492
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420 ngx_mail_add_addrs(ngx_conf_t *cf, ngx_mail_port_t *mport,
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421 ngx_mail_conf_addr_t *addr)
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290
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422 {
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492
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423 u_char *p;
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424 size_t len;
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425 ngx_uint_t i;
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426 ngx_mail_in_addr_t *addrs;
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427 struct sockaddr_in *sin;
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428 u_char buf[NGX_SOCKADDR_STRLEN];
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429
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430 mport->addrs = ngx_pcalloc(cf->pool,
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431 mport->naddrs * sizeof(ngx_mail_in_addr_t));
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432 if (mport->addrs == NULL) {
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433 return NGX_ERROR;
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|
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434 }
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435
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436 addrs = mport->addrs;
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437
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438 for (i = 0; i < mport->naddrs; i++) {
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439
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440 sin = (struct sockaddr_in *) addr[i].sockaddr;
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441 addrs[i].addr = sin->sin_addr.s_addr;
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442
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443 addrs[i].conf.ctx = addr[i].ctx;
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444 #if (NGX_MAIL_SSL)
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445 addrs[i].conf.ssl = addr[i].ssl;
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446 #endif
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447
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448 len = ngx_sock_ntop(addr[i].sockaddr, buf, NGX_SOCKADDR_STRLEN, 1);
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449
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450 p = ngx_pnalloc(cf->pool, len);
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|
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451 if (p == NULL) {
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452 return NGX_ERROR;
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|
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453 }
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|
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454
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|
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455 ngx_memcpy(p, buf, len);
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|
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456
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|
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457 addrs[i].conf.addr_text.len = len;
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458 addrs[i].conf.addr_text.data = p;
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|
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459 }
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|
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460
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|
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461 return NGX_OK;
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|
|
462 }
|
|
|
463
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|
|
464
|
|
|
465 #if (NGX_HAVE_INET6)
|
|
290
|
466
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|
492
|
467 static ngx_int_t
|
|
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468 ngx_mail_add_addrs6(ngx_conf_t *cf, ngx_mail_port_t *mport,
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|
|
469 ngx_mail_conf_addr_t *addr)
|
|
|
470 {
|
|
|
471 u_char *p;
|
|
|
472 size_t len;
|
|
|
473 ngx_uint_t i;
|
|
|
474 ngx_mail_in6_addr_t *addrs6;
|
|
|
475 struct sockaddr_in6 *sin6;
|
|
|
476 u_char buf[NGX_SOCKADDR_STRLEN];
|
|
|
477
|
|
|
478 mport->addrs = ngx_pcalloc(cf->pool,
|
|
|
479 mport->naddrs * sizeof(ngx_mail_in6_addr_t));
|
|
|
480 if (mport->addrs == NULL) {
|
|
|
481 return NGX_ERROR;
|
|
|
482 }
|
|
|
483
|
|
|
484 addrs6 = mport->addrs;
|
|
|
485
|
|
|
486 for (i = 0; i < mport->naddrs; i++) {
|
|
|
487
|
|
|
488 sin6 = (struct sockaddr_in6 *) addr[i].sockaddr;
|
|
|
489 addrs6[i].addr6 = sin6->sin6_addr;
|
|
|
490
|
|
|
491 addrs6[i].conf.ctx = addr[i].ctx;
|
|
|
492 #if (NGX_MAIL_SSL)
|
|
|
493 addrs6[i].conf.ssl = addr[i].ssl;
|
|
|
494 #endif
|
|
290
|
495
|
|
492
|
496 len = ngx_sock_ntop(addr[i].sockaddr, buf, NGX_SOCKADDR_STRLEN, 1);
|
|
|
497
|
|
|
498 p = ngx_pnalloc(cf->pool, len);
|
|
|
499 if (p == NULL) {
|
|
|
500 return NGX_ERROR;
|
|
|
501 }
|
|
|
502
|
|
|
503 ngx_memcpy(p, buf, len);
|
|
|
504
|
|
|
505 addrs6[i].conf.addr_text.len = len;
|
|
|
506 addrs6[i].conf.addr_text.data = p;
|
|
|
507 }
|
|
|
508
|
|
|
509 return NGX_OK;
|
|
|
510 }
|
|
|
511
|
|
|
512 #endif
|
|
|
513
|
|
|
514
|
|
|
515 static ngx_int_t
|
|
|
516 ngx_mail_cmp_conf_addrs(const void *one, const void *two)
|
|
|
517 {
|
|
|
518 ngx_mail_conf_addr_t *first, *second;
|
|
|
519
|
|
|
520 first = (ngx_mail_conf_addr_t *) one;
|
|
|
521 second = (ngx_mail_conf_addr_t *) two;
|
|
|
522
|
|
|
523 if (first->wildcard) {
|
|
|
524 /* a wildcard must be the last resort, shift it to the end */
|
|
290
|
525 return 1;
|
|
|
526 }
|
|
|
527
|
|
|
528 if (first->bind && !second->bind) {
|
|
|
529 /* shift explicit bind()ed addresses to the start */
|
|
|
530 return -1;
|
|
|
531 }
|
|
|
532
|
|
|
533 if (!first->bind && second->bind) {
|
|
|
534 /* shift explicit bind()ed addresses to the start */
|
|
|
535 return 1;
|
|
|
536 }
|
|
|
537
|
|
|
538 /* do not sort by default */
|
|
|
539
|
|
|
540 return 0;
|
|
|
541 }
|
