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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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660
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4 * Copyright (C) Nginx, Inc.
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290
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5 */
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6
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7
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8 #include <ngx_config.h>
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9 #include <ngx_core.h>
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10 #include <ngx_event.h>
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11 #include <ngx_mail.h>
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12
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13
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14 static char *ngx_mail_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
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492
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15 static ngx_int_t ngx_mail_add_ports(ngx_conf_t *cf, ngx_array_t *ports,
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16 ngx_mail_listen_t *listen);
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17 static char *ngx_mail_optimize_servers(ngx_conf_t *cf, ngx_array_t *ports);
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18 static ngx_int_t ngx_mail_add_addrs(ngx_conf_t *cf, ngx_mail_port_t *mport,
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19 ngx_mail_conf_addr_t *addr);
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20 #if (NGX_HAVE_INET6)
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21 static ngx_int_t ngx_mail_add_addrs6(ngx_conf_t *cf, ngx_mail_port_t *mport,
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22 ngx_mail_conf_addr_t *addr);
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23 #endif
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24 static ngx_int_t ngx_mail_cmp_conf_addrs(const void *one, const void *two);
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290
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25
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26
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27 ngx_uint_t ngx_mail_max_module;
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28
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29
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30 static ngx_command_t ngx_mail_commands[] = {
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31
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32 { ngx_string("mail"),
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33 NGX_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS,
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34 ngx_mail_block,
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35 0,
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36 0,
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37 NULL },
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38
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39 { ngx_string("imap"),
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40 NGX_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS,
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41 ngx_mail_block,
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42 0,
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43 0,
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44 NULL },
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45
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46 ngx_null_command
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47 };
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48
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49
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50 static ngx_core_module_t ngx_mail_module_ctx = {
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51 ngx_string("mail"),
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52 NULL,
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53 NULL
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54 };
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55
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56
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57 ngx_module_t ngx_mail_module = {
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58 NGX_MODULE_V1,
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59 &ngx_mail_module_ctx, /* module context */
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60 ngx_mail_commands, /* module directives */
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61 NGX_CORE_MODULE, /* module type */
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62 NULL, /* init master */
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63 NULL, /* init module */
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64 NULL, /* init process */
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65 NULL, /* init thread */
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66 NULL, /* exit thread */
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67 NULL, /* exit process */
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68 NULL, /* exit master */
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69 NGX_MODULE_V1_PADDING
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70 };
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71
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72
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73 static char *
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74 ngx_mail_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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75 {
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76 char *rv;
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492
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77 ngx_uint_t i, m, mi, s;
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290
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78 ngx_conf_t pcf;
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492
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79 ngx_array_t ports;
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80 ngx_mail_listen_t *listen;
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290
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81 ngx_mail_module_t *module;
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82 ngx_mail_conf_ctx_t *ctx;
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83 ngx_mail_core_srv_conf_t **cscfp;
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84 ngx_mail_core_main_conf_t *cmcf;
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85
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86 if (cmd->name.data[0] == 'i') {
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87 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
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88 "the \"imap\" directive is deprecated, "
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89 "use the \"mail\" directive instead");
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90 }
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91
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92 /* the main mail context */
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93
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94 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_mail_conf_ctx_t));
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95 if (ctx == NULL) {
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96 return NGX_CONF_ERROR;
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97 }
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98
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99 *(ngx_mail_conf_ctx_t **) conf = ctx;
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100
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101 /* count the number of the http modules and set up their indices */
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102
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103 ngx_mail_max_module = 0;
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104 for (m = 0; ngx_modules[m]; m++) {
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105 if (ngx_modules[m]->type != NGX_MAIL_MODULE) {
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106 continue;
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107 }
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108
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109 ngx_modules[m]->ctx_index = ngx_mail_max_module++;
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110 }
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111
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112
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113 /* the mail main_conf context, it is the same in the all mail contexts */
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114
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115 ctx->main_conf = ngx_pcalloc(cf->pool,
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116 sizeof(void *) * ngx_mail_max_module);
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117 if (ctx->main_conf == NULL) {
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118 return NGX_CONF_ERROR;
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119 }
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120
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121
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122 /*
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123 * the mail null srv_conf context, it is used to merge
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124 * the server{}s' srv_conf's
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125 */
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126
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127 ctx->srv_conf = ngx_pcalloc(cf->pool, sizeof(void *) * ngx_mail_max_module);
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128 if (ctx->srv_conf == NULL) {
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129 return NGX_CONF_ERROR;
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130 }
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131
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132
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133 /*
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134 * create the main_conf's, the null srv_conf's, and the null loc_conf's
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135 * of the all mail modules
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136 */
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137
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138 for (m = 0; ngx_modules[m]; m++) {
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139 if (ngx_modules[m]->type != NGX_MAIL_MODULE) {
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140 continue;
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141 }
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142
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143 module = ngx_modules[m]->ctx;
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144 mi = ngx_modules[m]->ctx_index;
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145
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146 if (module->create_main_conf) {
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147 ctx->main_conf[mi] = module->create_main_conf(cf);
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148 if (ctx->main_conf[mi] == NULL) {
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149 return NGX_CONF_ERROR;
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150 }
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151 }
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152
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153 if (module->create_srv_conf) {
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154 ctx->srv_conf[mi] = module->create_srv_conf(cf);
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155 if (ctx->srv_conf[mi] == NULL) {
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156 return NGX_CONF_ERROR;
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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
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162 /* parse inside the mail{} block */
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163
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164 pcf = *cf;
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165 cf->ctx = ctx;
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166
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167 cf->module_type = NGX_MAIL_MODULE;
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168 cf->cmd_type = NGX_MAIL_MAIN_CONF;
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169 rv = ngx_conf_parse(cf, NULL);
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170
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171 if (rv != NGX_CONF_OK) {
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172 *cf = pcf;
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173 return rv;
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174 }
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175
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176
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177 /* init mail{} main_conf's, merge the server{}s' srv_conf's */
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178
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179 cmcf = ctx->main_conf[ngx_mail_core_module.ctx_index];
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180 cscfp = cmcf->servers.elts;
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181
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182 for (m = 0; ngx_modules[m]; m++) {
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183 if (ngx_modules[m]->type != NGX_MAIL_MODULE) {
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184 continue;
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185 }
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186
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187 module = ngx_modules[m]->ctx;
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188 mi = ngx_modules[m]->ctx_index;
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189
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190 /* init mail{} main_conf's */
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191
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336
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192 cf->ctx = ctx;
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193
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290
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194 if (module->init_main_conf) {
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195 rv = module->init_main_conf(cf, ctx->main_conf[mi]);
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196 if (rv != NGX_CONF_OK) {
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197 *cf = pcf;
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198 return rv;
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199 }
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200 }
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201
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202 for (s = 0; s < cmcf->servers.nelts; s++) {
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203
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204 /* merge the server{}s' srv_conf's */
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205
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336
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206 cf->ctx = cscfp[s]->ctx;
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207
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290
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208 if (module->merge_srv_conf) {
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209 rv = module->merge_srv_conf(cf,
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210 ctx->srv_conf[mi],
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211 cscfp[s]->ctx->srv_conf[mi]);
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212 if (rv != NGX_CONF_OK) {
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213 *cf = pcf;
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214 return rv;
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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
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220 *cf = pcf;
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221
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222
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492
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223 if (ngx_array_init(&ports, cf->temp_pool, 4, sizeof(ngx_mail_conf_port_t))
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290
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224 != NGX_OK)
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225 {
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226 return NGX_CONF_ERROR;
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227 }
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228
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492
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229 listen = cmcf->listen.elts;
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290
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230
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492
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231 for (i = 0; i < cmcf->listen.nelts; i++) {
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232 if (ngx_mail_add_ports(cf, &ports, &listen[i]) != NGX_OK) {
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290
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233 return NGX_CONF_ERROR;
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234 }
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492
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235 }
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290
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236
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492
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237 return ngx_mail_optimize_servers(cf, &ports);
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238 }
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239
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240
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241 static ngx_int_t
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242 ngx_mail_add_ports(ngx_conf_t *cf, ngx_array_t *ports,
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243 ngx_mail_listen_t *listen)
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244 {
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245 in_port_t p;
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246 ngx_uint_t i;
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247 struct sockaddr *sa;
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248 struct sockaddr_in *sin;
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249 ngx_mail_conf_port_t *port;
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250 ngx_mail_conf_addr_t *addr;
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251 #if (NGX_HAVE_INET6)
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252 struct sockaddr_in6 *sin6;
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253 #endif
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254
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255 sa = (struct sockaddr *) &listen->sockaddr;
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290
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256
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492
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257 switch (sa->sa_family) {
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258
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259 #if (NGX_HAVE_INET6)
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260 case AF_INET6:
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261 sin6 = (struct sockaddr_in6 *) sa;
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262 p = sin6->sin6_port;
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263 break;
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264 #endif
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265
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266 default: /* AF_INET */
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267 sin = (struct sockaddr_in *) sa;
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268 p = sin->sin_port;
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269 break;
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270 }
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271
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272 port = ports->elts;
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273 for (i = 0; i < ports->nelts; i++) {
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274 if (p == port[i].port && sa->sa_family == port[i].family) {
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275
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276 /* a port is already in the port list */
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277
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278 port = &port[i];
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279 goto found;
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290
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280 }
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281 }
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282
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492
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283 /* add a port to the port list */
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284
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285 port = ngx_array_push(ports);
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286 if (port == NULL) {
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287 return NGX_ERROR;
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288 }
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289
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290 port->family = sa->sa_family;
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291 port->port = p;
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290
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292
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492
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293 if (ngx_array_init(&port->addrs, cf->temp_pool, 2,
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294 sizeof(ngx_mail_conf_addr_t))
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295 != NGX_OK)
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296 {
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297 return NGX_ERROR;
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298 }
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299
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300 found:
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301
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302 addr = ngx_array_push(&port->addrs);
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303 if (addr == NULL) {
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304 return NGX_ERROR;
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305 }
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290
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306
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492
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307 addr->sockaddr = (struct sockaddr *) &listen->sockaddr;
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308 addr->socklen = listen->socklen;
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309 addr->ctx = listen->ctx;
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310 addr->bind = listen->bind;
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311 addr->wildcard = listen->wildcard;
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654
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312 addr->so_keepalive = listen->so_keepalive;
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313 #if (NGX_HAVE_KEEPALIVE_TUNABLE)
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314 addr->tcp_keepidle = listen->tcp_keepidle;
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315 addr->tcp_keepintvl = listen->tcp_keepintvl;
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316 addr->tcp_keepcnt = listen->tcp_keepcnt;
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317 #endif
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492
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318 #if (NGX_MAIL_SSL)
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319 addr->ssl = listen->ssl;
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320 #endif
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321 #if (NGX_HAVE_INET6 && defined IPV6_V6ONLY)
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322 addr->ipv6only = listen->ipv6only;
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323 #endif
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324
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325 return NGX_OK;
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326 }
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327
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290
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328
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492
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329 static char *
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330 ngx_mail_optimize_servers(ngx_conf_t *cf, ngx_array_t *ports)
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331 {
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332 ngx_uint_t i, p, last, bind_wildcard;
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333 ngx_listening_t *ls;
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334 ngx_mail_port_t *mport;
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335 ngx_mail_conf_port_t *port;
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336 ngx_mail_conf_addr_t *addr;
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290
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337
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492
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338 port = ports->elts;
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339 for (p = 0; p < ports->nelts; p++) {
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340
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341 ngx_sort(port[p].addrs.elts, (size_t) port[p].addrs.nelts,
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342 sizeof(ngx_mail_conf_addr_t), ngx_mail_cmp_conf_addrs);
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343
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344 addr = port[p].addrs.elts;
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345 last = port[p].addrs.nelts;
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290
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346
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347 /*
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348 * if there is the binding to the "*:port" then we need to bind()
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349 * to the "*:port" only and ignore the other bindings
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350 */
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351
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492
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352 if (addr[last - 1].wildcard) {
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353 addr[last - 1].bind = 1;
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354 bind_wildcard = 1;
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290
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355
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356 } else {
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492
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357 bind_wildcard = 0;
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290
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358 }
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359
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492
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360 i = 0;
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290
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361
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492
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362 while (i < last) {
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363
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364 if (bind_wildcard && !addr[i].bind) {
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365 i++;
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290
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366 continue;
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367 }
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368
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492
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369 ls = ngx_create_listening(cf, addr[i].sockaddr, addr[i].socklen);
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290
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370 if (ls == NULL) {
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492
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371 return NGX_CONF_ERROR;
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290
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372 }
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373
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374 ls->addr_ntop = 1;
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375 ls->handler = ngx_mail_init_connection;
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376 ls->pool_size = 256;
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377
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484
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378 /* TODO: error_log directive */
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379 ls->logp = &cf->cycle->new_log;
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290
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380 ls->log.data = &ls->addr_text;
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381 ls->log.handler = ngx_accept_log_error;
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382
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654
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383 ls->keepalive = addr[i].so_keepalive;
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384 #if (NGX_HAVE_KEEPALIVE_TUNABLE)
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385 ls->keepidle = addr[i].tcp_keepidle;
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386 ls->keepintvl = addr[i].tcp_keepintvl;
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387 ls->keepcnt = addr[i].tcp_keepcnt;
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388 #endif
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389
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492
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390 #if (NGX_HAVE_INET6 && defined IPV6_V6ONLY)
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391 ls->ipv6only = addr[i].ipv6only;
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392 #endif
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393
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394 mport = ngx_palloc(cf->pool, sizeof(ngx_mail_port_t));
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395 if (mport == NULL) {
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290
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396 return NGX_CONF_ERROR;
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397 }
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398
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492
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399 ls->servers = mport;
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290
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400
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492
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401 if (i == last - 1) {
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402 mport->naddrs = last;
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290
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403
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404 } else {
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492
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405 mport->naddrs = 1;
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406 i = 0;
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290
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407 }
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408
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492
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409 switch (ls->sockaddr->sa_family) {
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410 #if (NGX_HAVE_INET6)
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|
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411 case AF_INET6:
|
|
|
412 if (ngx_mail_add_addrs6(cf, mport, addr) != NGX_OK) {
|
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290
|
413 return NGX_CONF_ERROR;
|
|
|
414 }
|
|
492
|
415 break;
|
|
404
|
416 #endif
|
|
492
|
417 default: /* AF_INET */
|
|
|
418 if (ngx_mail_add_addrs(cf, mport, addr) != NGX_OK) {
|
|
|
419 return NGX_CONF_ERROR;
|
|
|
420 }
|
|
290
|
421 break;
|
|
|
422 }
|
|
|
423
|
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492
|
424 addr++;
|
|
290
|
425 last--;
|
|
|
426 }
|
|
|
427 }
|
|
|
428
|
|
|
429 return NGX_CONF_OK;
|
|
|
430 }
|
|
|
431
|
|
|
432
|
|
372
|
433 static ngx_int_t
|
|
492
|
434 ngx_mail_add_addrs(ngx_conf_t *cf, ngx_mail_port_t *mport,
|
|
|
435 ngx_mail_conf_addr_t *addr)
|
|
290
|
436 {
|
|
492
|
437 u_char *p;
|
|
|
438 size_t len;
|
|
|
439 ngx_uint_t i;
|
|
|
440 ngx_mail_in_addr_t *addrs;
|
|
|
441 struct sockaddr_in *sin;
|
|
|
442 u_char buf[NGX_SOCKADDR_STRLEN];
|
|
|
443
|
|
|
444 mport->addrs = ngx_pcalloc(cf->pool,
|
|
|
445 mport->naddrs * sizeof(ngx_mail_in_addr_t));
|
|
|
446 if (mport->addrs == NULL) {
|
|
|
447 return NGX_ERROR;
|
|
|
448 }
|
|
|
449
|
|
|
450 addrs = mport->addrs;
|
|
|
451
|
|
|
452 for (i = 0; i < mport->naddrs; i++) {
|
|
|
453
|
|
|
454 sin = (struct sockaddr_in *) addr[i].sockaddr;
|
|
|
455 addrs[i].addr = sin->sin_addr.s_addr;
|
|
|
456
|
|
|
457 addrs[i].conf.ctx = addr[i].ctx;
|
|
|
458 #if (NGX_MAIL_SSL)
|
|
|
459 addrs[i].conf.ssl = addr[i].ssl;
|
|
|
460 #endif
|
|
|
461
|
|
|
462 len = ngx_sock_ntop(addr[i].sockaddr, buf, NGX_SOCKADDR_STRLEN, 1);
|
|
|
463
|
|
|
464 p = ngx_pnalloc(cf->pool, len);
|
|
|
465 if (p == NULL) {
|
|
|
466 return NGX_ERROR;
|
|
|
467 }
|
|
|
468
|
|
|
469 ngx_memcpy(p, buf, len);
|
|
|
470
|
|
|
471 addrs[i].conf.addr_text.len = len;
|
|
|
472 addrs[i].conf.addr_text.data = p;
|
|
|
473 }
|
|
|
474
|
|
|
475 return NGX_OK;
|
|
|
476 }
|
|
|
477
|
|
|
478
|
|
|
479 #if (NGX_HAVE_INET6)
|
|
290
|
480
|
|
492
|
481 static ngx_int_t
|
|
|
482 ngx_mail_add_addrs6(ngx_conf_t *cf, ngx_mail_port_t *mport,
|
|
|
483 ngx_mail_conf_addr_t *addr)
|
|
|
484 {
|
|
|
485 u_char *p;
|
|
|
486 size_t len;
|
|
|
487 ngx_uint_t i;
|
|
|
488 ngx_mail_in6_addr_t *addrs6;
|
|
|
489 struct sockaddr_in6 *sin6;
|
|
|
490 u_char buf[NGX_SOCKADDR_STRLEN];
|
|
|
491
|
|
|
492 mport->addrs = ngx_pcalloc(cf->pool,
|
|
|
493 mport->naddrs * sizeof(ngx_mail_in6_addr_t));
|
|
|
494 if (mport->addrs == NULL) {
|
|
|
495 return NGX_ERROR;
|
|
|
496 }
|
|
|
497
|
|
|
498 addrs6 = mport->addrs;
|
|
|
499
|
|
|
500 for (i = 0; i < mport->naddrs; i++) {
|
|
|
501
|
|
|
502 sin6 = (struct sockaddr_in6 *) addr[i].sockaddr;
|
|
|
503 addrs6[i].addr6 = sin6->sin6_addr;
|
|
|
504
|
|
|
505 addrs6[i].conf.ctx = addr[i].ctx;
|
|
|
506 #if (NGX_MAIL_SSL)
|
|
|
507 addrs6[i].conf.ssl = addr[i].ssl;
|
|
|
508 #endif
|
|
290
|
509
|
|
492
|
510 len = ngx_sock_ntop(addr[i].sockaddr, buf, NGX_SOCKADDR_STRLEN, 1);
|
|
|
511
|
|
|
512 p = ngx_pnalloc(cf->pool, len);
|
|
|
513 if (p == NULL) {
|
|
|
514 return NGX_ERROR;
|
|
|
515 }
|
|
|
516
|
|
|
517 ngx_memcpy(p, buf, len);
|
|
|
518
|
|
|
519 addrs6[i].conf.addr_text.len = len;
|
|
|
520 addrs6[i].conf.addr_text.data = p;
|
|
|
521 }
|
|
|
522
|
|
|
523 return NGX_OK;
|
|
|
524 }
|
|
|
525
|
|
|
526 #endif
|
|
|
527
|
|
|
528
|
|
|
529 static ngx_int_t
|
|
|
530 ngx_mail_cmp_conf_addrs(const void *one, const void *two)
|
|
|
531 {
|
|
|
532 ngx_mail_conf_addr_t *first, *second;
|
|
|
533
|
|
|
534 first = (ngx_mail_conf_addr_t *) one;
|
|
|
535 second = (ngx_mail_conf_addr_t *) two;
|
|
|
536
|
|
|
537 if (first->wildcard) {
|
|
|
538 /* a wildcard must be the last resort, shift it to the end */
|
|
290
|
539 return 1;
|
|
|
540 }
|
|
|
541
|
|
|
542 if (first->bind && !second->bind) {
|
|
|
543 /* shift explicit bind()ed addresses to the start */
|
|
|
544 return -1;
|
|
|
545 }
|
|
|
546
|
|
|
547 if (!first->bind && second->bind) {
|
|
|
548 /* shift explicit bind()ed addresses to the start */
|
|
|
549 return 1;
|
|
|
550 }
|
|
|
551
|
|
|
552 /* do not sort by default */
|
|
|
553
|
|
|
554 return 0;
|
|
|
555 }
|
