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