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521
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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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527
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21 static char *ngx_imap_core_capability(ngx_conf_t *cf, ngx_command_t *cmd,
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22 void *conf);
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521
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23
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24
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25 static ngx_conf_enum_t ngx_imap_core_procotol[] = {
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26 { ngx_string("pop3"), NGX_IMAP_POP3_PROTOCOL },
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27 { ngx_string("imap"), NGX_IMAP_IMAP_PROTOCOL },
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28 { ngx_null_string, 0 }
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29 };
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30
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31
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527
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32 static ngx_str_t ngx_pop3_default_capabilities[] = {
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33 ngx_string("TOP"),
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34 ngx_string("USER"),
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35 ngx_string("UIDL"),
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36 ngx_null_string
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37 };
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38
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39
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40 static ngx_str_t ngx_imap_default_capabilities[] = {
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41 ngx_string("IMAP4"),
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42 ngx_string("IMAP4rev1"),
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43 ngx_string("UIDPLUS"),
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44 ngx_null_string
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45 };
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46
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47
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521
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48 static ngx_command_t ngx_imap_core_commands[] = {
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49
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50 { ngx_string("server"),
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51 NGX_IMAP_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS,
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52 ngx_imap_core_server,
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53 0,
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54 0,
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55 NULL },
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56
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57 { ngx_string("listen"),
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58 NGX_IMAP_SRV_CONF|NGX_CONF_TAKE1,
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59 ngx_imap_core_listen,
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60 0,
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61 0,
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62 NULL },
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63
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64 { ngx_string("protocol"),
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65 NGX_IMAP_SRV_CONF|NGX_CONF_TAKE1,
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66 ngx_conf_set_enum_slot,
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67 NGX_IMAP_SRV_CONF_OFFSET,
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68 offsetof(ngx_imap_core_srv_conf_t, protocol),
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69 &ngx_imap_core_procotol },
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70
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71 { ngx_string("imap_client_buffer"),
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72 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_TAKE1,
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73 ngx_conf_set_size_slot,
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74 NGX_IMAP_SRV_CONF_OFFSET,
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75 offsetof(ngx_imap_core_srv_conf_t, imap_client_buffer_size),
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76 NULL },
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77
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78 { ngx_string("proxy_buffer"),
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79 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_TAKE1,
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80 ngx_conf_set_size_slot,
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81 NGX_IMAP_SRV_CONF_OFFSET,
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82 offsetof(ngx_imap_core_srv_conf_t, proxy_buffer_size),
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83 NULL },
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84
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85 { ngx_string("timeout"),
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86 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_TAKE1,
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87 ngx_conf_set_msec_slot,
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88 NGX_IMAP_SRV_CONF_OFFSET,
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89 offsetof(ngx_imap_core_srv_conf_t, timeout),
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90 NULL },
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91
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527
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92 { ngx_string("pop3_capabilities"),
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93 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_1MORE,
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94 ngx_imap_core_capability,
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95 NGX_IMAP_SRV_CONF_OFFSET,
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96 offsetof(ngx_imap_core_srv_conf_t, pop3_capabilities),
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97 NULL },
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98
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99 { ngx_string("imap_capabilities"),
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100 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_1MORE,
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101 ngx_imap_core_capability,
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102 NGX_IMAP_SRV_CONF_OFFSET,
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103 offsetof(ngx_imap_core_srv_conf_t, imap_capabilities),
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104 NULL },
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105
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521
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106 ngx_null_command
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107 };
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108
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109
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110 static ngx_imap_module_t ngx_imap_core_module_ctx = {
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111 ngx_imap_core_create_main_conf, /* create main configuration */
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112 NULL, /* init main configuration */
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113
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114 ngx_imap_core_create_srv_conf, /* create server configuration */
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115 ngx_imap_core_merge_srv_conf /* merge server configuration */
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116 };
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117
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118
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119 ngx_module_t ngx_imap_core_module = {
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120 NGX_MODULE_V1,
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121 &ngx_imap_core_module_ctx, /* module context */
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122 ngx_imap_core_commands, /* module directives */
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123 NGX_IMAP_MODULE, /* module type */
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124 NULL, /* init module */
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125 NULL /* init process */
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126 };
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127
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128
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129 static void *
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130 ngx_imap_core_create_main_conf(ngx_conf_t *cf)
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131 {
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132 ngx_imap_core_main_conf_t *cmcf;
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133
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134 cmcf = ngx_pcalloc(cf->pool, sizeof(ngx_imap_core_main_conf_t));
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135 if (cmcf == NULL) {
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136 return NGX_CONF_ERROR;
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137 }
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138
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139 if (ngx_array_init(&cmcf->servers, cf->pool, 4,
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140 sizeof(ngx_imap_core_srv_conf_t *)) == NGX_ERROR)
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141 {
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142 return NGX_CONF_ERROR;
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143 }
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144
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145 return cmcf;
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146 }
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147
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148
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149 static void *
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150 ngx_imap_core_create_srv_conf(ngx_conf_t *cf)
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151 {
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152 ngx_imap_core_srv_conf_t *cscf;
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153
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154 cscf = ngx_pcalloc(cf->pool, sizeof(ngx_imap_core_srv_conf_t));
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155 if (cscf == NULL) {
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527
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156 return NULL;
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521
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157 }
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158
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159 cscf->imap_client_buffer_size = NGX_CONF_UNSET_SIZE;
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160 cscf->proxy_buffer_size = NGX_CONF_UNSET_SIZE;
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161 cscf->timeout = NGX_CONF_UNSET_MSEC;
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162 cscf->protocol = NGX_CONF_UNSET_UINT;
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163
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527
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164 if (ngx_array_init(&cscf->pop3_capabilities, cf->pool, 4, sizeof(ngx_str_t))
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165 != NGX_OK)
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166 {
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167 return NULL;
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168 }
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169
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170 if (ngx_array_init(&cscf->imap_capabilities, cf->pool, 4, sizeof(ngx_str_t))
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171 != NGX_OK)
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172 {
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173 return NULL;
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174 }
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175
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521
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176 return cscf;
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177 }
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178
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179
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180 static char *
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181 ngx_imap_core_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child)
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182 {
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183 ngx_imap_core_srv_conf_t *prev = parent;
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184 ngx_imap_core_srv_conf_t *conf = child;
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185
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527
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186 size_t size;
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187 ngx_buf_t *b;
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188 ngx_str_t *c, *d;
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189 ngx_uint_t i;
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190
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521
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191 ngx_conf_merge_size_value(conf->imap_client_buffer_size,
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192 prev->imap_client_buffer_size,
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193 (size_t) ngx_pagesize);
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194 ngx_conf_merge_size_value(conf->proxy_buffer_size, prev->proxy_buffer_size,
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195 (size_t) ngx_pagesize);
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196 ngx_conf_merge_msec_value(conf->timeout, prev->timeout, 60000);
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197 ngx_conf_merge_unsigned_value(conf->protocol, prev->protocol,
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198 NGX_IMAP_IMAP_PROTOCOL);
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199
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527
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200
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201 if (conf->pop3_capabilities.nelts == 0) {
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202 conf->pop3_capabilities = prev->pop3_capabilities;
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203 }
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204
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205 if (conf->pop3_capabilities.nelts == 0) {
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206
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207 for (d = ngx_pop3_default_capabilities; d->len; d++) {
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208 c = ngx_array_push(&conf->pop3_capabilities);
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209 if (c == NULL) {
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210 return NGX_CONF_ERROR;
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211 }
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212
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213 *c = *d;
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214 }
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215 }
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216
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217 size = sizeof("+OK Capability list follows" CRLF) - 1
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218 + sizeof("." CRLF) - 1;
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219
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220 c = conf->pop3_capabilities.elts;
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221 for (i = 0; i < conf->pop3_capabilities.nelts; i++) {
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222 size += c[i].len + sizeof(CRLF) - 1;
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223 }
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224
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225 b = ngx_create_temp_buf(cf->pool, size);
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226 if (b == NULL) {
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227 return NGX_CONF_ERROR;
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228 }
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229
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230 b->last = ngx_cpymem(b->last, "+OK Capability list follows" CRLF,
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231 sizeof("+OK Capability list follows" CRLF) - 1);
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232
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233 for (i = 0; i < conf->pop3_capabilities.nelts; i++) {
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234 b->last = ngx_cpymem(b->last, c[i].data, c[i].len);
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235 *b->last++ = CR; *b->last++ = LF;
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236 }
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237
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238 *b->last++ = '.'; *b->last++ = CR; *b->last++ = LF;
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239
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240 conf->pop3_capability = b;
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241
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242
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243 if (conf->imap_capabilities.nelts == 0) {
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244 conf->imap_capabilities = prev->imap_capabilities;
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245 }
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246
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247 if (conf->imap_capabilities.nelts == 0) {
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248
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249 for (d = ngx_imap_default_capabilities; d->len; d++) {
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250 c = ngx_array_push(&conf->imap_capabilities);
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251 if (c == NULL) {
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252 return NGX_CONF_ERROR;
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253 }
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254
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255 *c = *d;
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256 }
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257 }
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258
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259 size = sizeof("* CAPABILITY") - 1 + sizeof(CRLF) - 1;
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260
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261 c = conf->imap_capabilities.elts;
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262 for (i = 0; i < conf->imap_capabilities.nelts; i++) {
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263 size += 1 + c[i].len;
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264 }
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265
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266 b = ngx_create_temp_buf(cf->pool, size);
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267 if (b == NULL) {
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268 return NGX_CONF_ERROR;
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269 }
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270
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271 b->last = ngx_cpymem(b->last, "* CAPABILITY", sizeof("* CAPABILITY") - 1);
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272
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273 for (i = 0; i < conf->imap_capabilities.nelts; i++) {
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274 *b->last++ = ' ';
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275 b->last = ngx_cpymem(b->last, c[i].data, c[i].len);
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276 }
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277
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278 *b->last++ = CR; *b->last++ = LF;
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279
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280 conf->imap_capability = b;
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281
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521
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282 return NGX_CONF_OK;
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283 }
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284
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285
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286 static char *
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287 ngx_imap_core_server(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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288 {
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289 char *rv;
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290 void *mconf;
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291 ngx_uint_t m;
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292 ngx_conf_t pcf;
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293 ngx_imap_module_t *module;
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294 ngx_imap_conf_ctx_t *ctx, *imap_ctx;
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295 ngx_imap_core_srv_conf_t *cscf, **cscfp;
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296 ngx_imap_core_main_conf_t *cmcf;
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297
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298
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299 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_imap_conf_ctx_t));
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300 if (ctx == NULL) {
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301 return NGX_CONF_ERROR;
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302 }
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303
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304 imap_ctx = cf->ctx;
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305 ctx->main_conf = imap_ctx->main_conf;
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306
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307 /* the server{}'s srv_conf */
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308
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309 ctx->srv_conf = ngx_pcalloc(cf->pool, sizeof(void *) * ngx_imap_max_module);
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310 if (ctx->srv_conf == NULL) {
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311 return NGX_CONF_ERROR;
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312 }
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313
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314 for (m = 0; ngx_modules[m]; m++) {
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315 if (ngx_modules[m]->type != NGX_IMAP_MODULE) {
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316 continue;
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317 }
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318
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319 module = ngx_modules[m]->ctx;
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320
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321 if (module->create_srv_conf) {
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322 mconf = module->create_srv_conf(cf);
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323 if (mconf == NULL) {
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324 return NGX_CONF_ERROR;
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325 }
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326
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327 ctx->srv_conf[ngx_modules[m]->ctx_index] = mconf;
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328 }
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329 }
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330
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331 /* the server configuration context */
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332
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333 cscf = ctx->srv_conf[ngx_imap_core_module.ctx_index];
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334 cscf->ctx = ctx;
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335
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336 cmcf = ctx->main_conf[ngx_imap_core_module.ctx_index];
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337
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338 cscfp = ngx_array_push(&cmcf->servers);
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339 if (cscfp == NULL) {
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340 return NGX_CONF_ERROR;
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341 }
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342
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343 *cscfp = cscf;
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344
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345
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346 /* parse inside server{} */
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347
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348 pcf = *cf;
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349 cf->ctx = ctx;
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350 cf->cmd_type = NGX_IMAP_SRV_CONF;
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351
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352 rv = ngx_conf_parse(cf, NULL);
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353
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354 *cf = pcf;
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355
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356 return rv;
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357 }
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358
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359
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360 /* AF_INET only */
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361
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362 static char *
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363 ngx_imap_core_listen(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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364 {
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365 char *err;
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366 ngx_str_t *value;
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367 in_addr_t in_addr;
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368 struct hostent *h;
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369 ngx_listening_t *ls;
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370 ngx_inet_upstream_t inet_upstream;
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371
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372 value = cf->args->elts;
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373
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374 ngx_memzero(&inet_upstream, sizeof(ngx_inet_upstream_t));
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375
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376 inet_upstream.url = value[1];
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377 inet_upstream.port_only = 1;
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378
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379 err = ngx_inet_parse_host_port(&inet_upstream);
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380
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381 if (err) {
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382 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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523
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383 "%s in \"%V\" of the \"listen\" directive",
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384 err, &inet_upstream.url);
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521
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385 return NGX_CONF_ERROR;
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386 }
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387
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388 if (inet_upstream.host.len) {
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389 inet_upstream.host.data[inet_upstream.host.len] = '\0';
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390
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391 in_addr = inet_addr((const char *) inet_upstream.host.data);
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392
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393 if (in_addr == INADDR_NONE) {
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394 h = gethostbyname((const char *) inet_upstream.host.data);
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395
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396 if (h == NULL || h->h_addr_list[0] == NULL) {
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397 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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398 "can not resolve host \"%s\" "
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399 "in the \"listen\" directive",
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400 inet_upstream.host.data);
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401 return NGX_CONF_ERROR;
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402 }
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403
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404 in_addr = *(in_addr_t *)(h->h_addr_list[0]);
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405 }
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406
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407 } else {
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408 in_addr = INADDR_ANY;
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409 }
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410
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411
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412 ls = ngx_listening_inet_stream_socket(cf, in_addr, inet_upstream.port);
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413 if (ls == NULL) {
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414 return NGX_CONF_ERROR;
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415 }
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416
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417 ls->backlog = -1;
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418 ls->addr_ntop = 1;
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419 ls->handler = ngx_imap_init_connection;
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420 ls->pool_size = 256;
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421
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422 ls->ctx = cf->ctx;
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423
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424 /* STUB */
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|
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425 ls->log = cf->cycle->new_log;
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|
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426 /**/
|
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427
|
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428 return NGX_CONF_OK;
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|
|
429 }
|
|
527
|
430
|
|
|
431
|
|
|
432 static char *
|
|
|
433 ngx_imap_core_capability(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
434 {
|
|
|
435 char *p = conf;
|
|
|
436
|
|
|
437 ngx_str_t *c, *value;
|
|
|
438 ngx_uint_t i;
|
|
|
439 ngx_array_t *a;
|
|
|
440
|
|
|
441 a = (ngx_array_t *) (p + cmd->offset);
|
|
|
442
|
|
|
443 value = cf->args->elts;
|
|
|
444
|
|
|
445 for (i = 1; i < cf->args->nelts; i++) {
|
|
|
446 c = ngx_array_push(a);
|
|
|
447 if (c == NULL) {
|
|
|
448 return NGX_CONF_ERROR;
|
|
|
449 }
|
|
|
450
|
|
|
451 *c = value[i];
|
|
|
452 }
|
|
|
453
|
|
|
454 return NGX_CONF_OK;
|
|
|
455 }
|
