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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 void *ngx_imap_core_create_main_conf(ngx_conf_t *cf);
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14 static void *ngx_imap_core_create_srv_conf(ngx_conf_t *cf);
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15 static char *ngx_imap_core_merge_srv_conf(ngx_conf_t *cf, void *parent,
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16 void *child);
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17 static char *ngx_imap_core_server(ngx_conf_t *cf, ngx_command_t *cmd,
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18 void *conf);
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19 static char *ngx_imap_core_listen(ngx_conf_t *cf, ngx_command_t *cmd,
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20 void *conf);
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21
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22
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23 static ngx_conf_enum_t ngx_imap_core_procotol[] = {
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24 { ngx_string("pop3"), NGX_IMAP_POP3_PROTOCOL },
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25 { ngx_string("imap"), NGX_IMAP_IMAP_PROTOCOL },
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26 { ngx_null_string, 0 }
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27 };
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28
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29
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30 static ngx_command_t ngx_imap_core_commands[] = {
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31
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32 { ngx_string("server"),
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33 NGX_IMAP_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS,
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34 ngx_imap_core_server,
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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("listen"),
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40 NGX_IMAP_SRV_CONF|NGX_CONF_TAKE1,
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41 ngx_imap_core_listen,
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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_string("protocol"),
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47 NGX_IMAP_SRV_CONF|NGX_CONF_TAKE1,
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48 ngx_conf_set_enum_slot,
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49 NGX_IMAP_SRV_CONF_OFFSET,
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50 offsetof(ngx_imap_core_srv_conf_t, protocol),
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51 &ngx_imap_core_procotol },
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52
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53 { ngx_string("imap_client_buffer"),
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54 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_TAKE1,
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55 ngx_conf_set_size_slot,
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56 NGX_IMAP_SRV_CONF_OFFSET,
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57 offsetof(ngx_imap_core_srv_conf_t, imap_client_buffer_size),
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58 NULL },
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59
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60 { ngx_string("proxy_buffer"),
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61 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_TAKE1,
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62 ngx_conf_set_size_slot,
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63 NGX_IMAP_SRV_CONF_OFFSET,
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64 offsetof(ngx_imap_core_srv_conf_t, proxy_buffer_size),
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65 NULL },
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66
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67 { ngx_string("timeout"),
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68 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_TAKE1,
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69 ngx_conf_set_msec_slot,
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70 NGX_IMAP_SRV_CONF_OFFSET,
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71 offsetof(ngx_imap_core_srv_conf_t, timeout),
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72 NULL },
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73
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74 ngx_null_command
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75 };
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76
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77
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78 static ngx_imap_module_t ngx_imap_core_module_ctx = {
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79 ngx_imap_core_create_main_conf, /* create main configuration */
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80 NULL, /* init main configuration */
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81
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82 ngx_imap_core_create_srv_conf, /* create server configuration */
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83 ngx_imap_core_merge_srv_conf /* merge server configuration */
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84 };
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85
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86
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87 ngx_module_t ngx_imap_core_module = {
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88 NGX_MODULE_V1,
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89 &ngx_imap_core_module_ctx, /* module context */
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90 ngx_imap_core_commands, /* module directives */
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91 NGX_IMAP_MODULE, /* module type */
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92 NULL, /* init module */
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93 NULL /* init process */
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94 };
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95
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96
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97 static void *
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98 ngx_imap_core_create_main_conf(ngx_conf_t *cf)
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99 {
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100 ngx_imap_core_main_conf_t *cmcf;
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101
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102 cmcf = ngx_pcalloc(cf->pool, sizeof(ngx_imap_core_main_conf_t));
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103 if (cmcf == NULL) {
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104 return NGX_CONF_ERROR;
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105 }
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106
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107 if (ngx_array_init(&cmcf->servers, cf->pool, 4,
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108 sizeof(ngx_imap_core_srv_conf_t *)) == NGX_ERROR)
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109 {
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110 return NGX_CONF_ERROR;
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111 }
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112
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113 return cmcf;
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114 }
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115
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116
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117 static void *
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118 ngx_imap_core_create_srv_conf(ngx_conf_t *cf)
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119 {
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120 ngx_imap_core_srv_conf_t *cscf;
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121
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122 cscf = ngx_pcalloc(cf->pool, sizeof(ngx_imap_core_srv_conf_t));
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123 if (cscf == NULL) {
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124 return NGX_CONF_ERROR;
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125 }
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126
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127 cscf->imap_client_buffer_size = NGX_CONF_UNSET_SIZE;
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128 cscf->proxy_buffer_size = NGX_CONF_UNSET_SIZE;
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129 cscf->timeout = NGX_CONF_UNSET_MSEC;
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130 cscf->protocol = NGX_CONF_UNSET_UINT;
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131
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132 return cscf;
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133 }
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134
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135
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136 static char *
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137 ngx_imap_core_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child)
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138 {
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139 ngx_imap_core_srv_conf_t *prev = parent;
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140 ngx_imap_core_srv_conf_t *conf = child;
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141
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142 ngx_conf_merge_size_value(conf->imap_client_buffer_size,
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143 prev->imap_client_buffer_size,
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144 (size_t) ngx_pagesize);
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145 ngx_conf_merge_size_value(conf->proxy_buffer_size, prev->proxy_buffer_size,
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146 (size_t) ngx_pagesize);
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147 ngx_conf_merge_msec_value(conf->timeout, prev->timeout, 60000);
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148 ngx_conf_merge_unsigned_value(conf->protocol, prev->protocol,
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149 NGX_IMAP_IMAP_PROTOCOL);
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150
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151 return NGX_CONF_OK;
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152 }
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153
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154
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155 static char *
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156 ngx_imap_core_server(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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157 {
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158 char *rv;
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159 void *mconf;
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160 ngx_uint_t m;
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161 ngx_conf_t pcf;
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162 ngx_imap_module_t *module;
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163 ngx_imap_conf_ctx_t *ctx, *imap_ctx;
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164 ngx_imap_core_srv_conf_t *cscf, **cscfp;
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165 ngx_imap_core_main_conf_t *cmcf;
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166
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167
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168 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_imap_conf_ctx_t));
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169 if (ctx == NULL) {
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170 return NGX_CONF_ERROR;
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171 }
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172
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173 imap_ctx = cf->ctx;
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174 ctx->main_conf = imap_ctx->main_conf;
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175
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176 /* the server{}'s srv_conf */
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177
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178 ctx->srv_conf = ngx_pcalloc(cf->pool, sizeof(void *) * ngx_imap_max_module);
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179 if (ctx->srv_conf == NULL) {
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180 return NGX_CONF_ERROR;
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181 }
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182
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183 for (m = 0; ngx_modules[m]; m++) {
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184 if (ngx_modules[m]->type != NGX_IMAP_MODULE) {
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185 continue;
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186 }
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187
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188 module = ngx_modules[m]->ctx;
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189
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190 if (module->create_srv_conf) {
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191 mconf = module->create_srv_conf(cf);
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192 if (mconf == NULL) {
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193 return NGX_CONF_ERROR;
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194 }
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195
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196 ctx->srv_conf[ngx_modules[m]->ctx_index] = mconf;
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197 }
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198 }
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199
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200 /* the server configuration context */
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201
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202 cscf = ctx->srv_conf[ngx_imap_core_module.ctx_index];
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203 cscf->ctx = ctx;
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204
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205 cmcf = ctx->main_conf[ngx_imap_core_module.ctx_index];
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206
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207 cscfp = ngx_array_push(&cmcf->servers);
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208 if (cscfp == NULL) {
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209 return NGX_CONF_ERROR;
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210 }
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211
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212 *cscfp = cscf;
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213
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214
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215 /* parse inside server{} */
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216
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217 pcf = *cf;
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218 cf->ctx = ctx;
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219 cf->cmd_type = NGX_IMAP_SRV_CONF;
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220
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221 rv = ngx_conf_parse(cf, NULL);
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222
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223 *cf = pcf;
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224
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225 return rv;
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226 }
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227
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228
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229 /* AF_INET only */
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230
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231 static char *
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232 ngx_imap_core_listen(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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233 {
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234 char *err;
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235 ngx_str_t *value;
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236 in_addr_t in_addr;
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237 struct hostent *h;
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238 ngx_listening_t *ls;
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239 ngx_inet_upstream_t inet_upstream;
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240
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241 value = cf->args->elts;
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242
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243 ngx_memzero(&inet_upstream, sizeof(ngx_inet_upstream_t));
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244
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245 inet_upstream.url = value[1];
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246 inet_upstream.port_only = 1;
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247
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248 err = ngx_inet_parse_host_port(&inet_upstream);
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249
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250 if (err) {
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251 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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252 "%s in \"%V\" of the \"listen\" directive", err);
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253 return NGX_CONF_ERROR;
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254 }
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255
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256 if (inet_upstream.host.len) {
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257 inet_upstream.host.data[inet_upstream.host.len] = '\0';
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258
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259 in_addr = inet_addr((const char *) inet_upstream.host.data);
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260
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261 if (in_addr == INADDR_NONE) {
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262 h = gethostbyname((const char *) inet_upstream.host.data);
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263
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264 if (h == NULL || h->h_addr_list[0] == NULL) {
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265 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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266 "can not resolve host \"%s\" "
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267 "in the \"listen\" directive",
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268 inet_upstream.host.data);
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269 return NGX_CONF_ERROR;
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270 }
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271
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272 in_addr = *(in_addr_t *)(h->h_addr_list[0]);
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273 }
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274
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275 } else {
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276 in_addr = INADDR_ANY;
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277 }
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278
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279
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280 ls = ngx_listening_inet_stream_socket(cf, in_addr, inet_upstream.port);
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281 if (ls == NULL) {
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282 return NGX_CONF_ERROR;
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283 }
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284
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285 ls->backlog = -1;
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286 ls->addr_ntop = 1;
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287 ls->handler = ngx_imap_init_connection;
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288 ls->pool_size = 256;
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289
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290 ls->ctx = cf->ctx;
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291
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292 /* STUB */
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293 ls->log = cf->cycle->new_log;
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294 /**/
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295
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296 return NGX_CONF_OK;
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297 }
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