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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 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 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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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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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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250
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48 static ngx_conf_bitmask_t ngx_imap_auth_methods[] = {
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49 { ngx_string("plain"), NGX_IMAP_AUTH_PLAIN_ENABLED },
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50 { ngx_string("apop"), NGX_IMAP_AUTH_APOP_ENABLED },
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51 { ngx_null_string, 0 }
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52 };
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53
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54
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76
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55 static ngx_command_t ngx_imap_core_commands[] = {
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56
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57 { ngx_string("server"),
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58 NGX_IMAP_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS,
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59 ngx_imap_core_server,
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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("listen"),
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190
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65 NGX_IMAP_SRV_CONF|NGX_CONF_TAKE12,
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76
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66 ngx_imap_core_listen,
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67 0,
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68 0,
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69 NULL },
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70
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71 { ngx_string("protocol"),
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72 NGX_IMAP_SRV_CONF|NGX_CONF_TAKE1,
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73 ngx_conf_set_enum_slot,
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74 NGX_IMAP_SRV_CONF_OFFSET,
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75 offsetof(ngx_imap_core_srv_conf_t, protocol),
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76 &ngx_imap_core_procotol },
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77
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78 { ngx_string("imap_client_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, imap_client_buffer_size),
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83 NULL },
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84
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136
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85 { ngx_string("so_keepalive"),
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86 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_FLAG,
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87 ngx_conf_set_flag_slot,
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88 NGX_IMAP_SRV_CONF_OFFSET,
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89 offsetof(ngx_imap_core_srv_conf_t, so_keepalive),
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90 NULL },
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91
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76
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92 { ngx_string("timeout"),
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93 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_TAKE1,
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94 ngx_conf_set_msec_slot,
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95 NGX_IMAP_SRV_CONF_OFFSET,
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96 offsetof(ngx_imap_core_srv_conf_t, timeout),
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97 NULL },
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98
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99 { ngx_string("pop3_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, pop3_capabilities),
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104 NULL },
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105
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106 { ngx_string("imap_capabilities"),
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107 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_1MORE,
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108 ngx_imap_core_capability,
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109 NGX_IMAP_SRV_CONF_OFFSET,
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110 offsetof(ngx_imap_core_srv_conf_t, imap_capabilities),
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111 NULL },
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112
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250
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113 { ngx_string("server_name"),
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114 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_TAKE1,
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115 ngx_conf_set_str_slot,
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116 NGX_IMAP_SRV_CONF_OFFSET,
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117 offsetof(ngx_imap_core_srv_conf_t, server_name),
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118 NULL },
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119
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120 { ngx_string("auth"),
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121 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_1MORE,
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122 ngx_conf_set_bitmask_slot,
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123 NGX_IMAP_SRV_CONF_OFFSET,
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124 offsetof(ngx_imap_core_srv_conf_t, auth_methods),
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125 &ngx_imap_auth_methods },
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126
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76
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127 ngx_null_command
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128 };
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129
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130
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131 static ngx_imap_module_t ngx_imap_core_module_ctx = {
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132 ngx_imap_core_create_main_conf, /* create main configuration */
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133 NULL, /* init main configuration */
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134
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135 ngx_imap_core_create_srv_conf, /* create server configuration */
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136 ngx_imap_core_merge_srv_conf /* merge server configuration */
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137 };
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138
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139
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140 ngx_module_t ngx_imap_core_module = {
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141 NGX_MODULE_V1,
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142 &ngx_imap_core_module_ctx, /* module context */
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143 ngx_imap_core_commands, /* module directives */
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144 NGX_IMAP_MODULE, /* module type */
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90
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145 NULL, /* init master */
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76
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146 NULL, /* init module */
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90
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147 NULL, /* init process */
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148 NULL, /* init thread */
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149 NULL, /* exit thread */
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150 NULL, /* exit process */
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151 NULL, /* exit master */
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152 NGX_MODULE_V1_PADDING
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76
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153 };
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154
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155
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156 static void *
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157 ngx_imap_core_create_main_conf(ngx_conf_t *cf)
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126
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158 {
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76
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159 ngx_imap_core_main_conf_t *cmcf;
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160
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161 cmcf = ngx_pcalloc(cf->pool, sizeof(ngx_imap_core_main_conf_t));
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162 if (cmcf == NULL) {
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163 return NGX_CONF_ERROR;
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164 }
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165
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166 if (ngx_array_init(&cmcf->servers, cf->pool, 4,
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190
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167 sizeof(ngx_imap_core_srv_conf_t *))
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168 != NGX_OK)
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169 {
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170 return NGX_CONF_ERROR;
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171 }
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172
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173 if (ngx_array_init(&cmcf->listen, cf->pool, 4, sizeof(ngx_imap_listen_t))
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174 != NGX_OK)
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76
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175 {
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176 return NGX_CONF_ERROR;
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177 }
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178
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179 return cmcf;
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180 }
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181
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182
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183 static void *
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184 ngx_imap_core_create_srv_conf(ngx_conf_t *cf)
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126
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185 {
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76
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186 ngx_imap_core_srv_conf_t *cscf;
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126
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187
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76
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188 cscf = ngx_pcalloc(cf->pool, sizeof(ngx_imap_core_srv_conf_t));
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189 if (cscf == NULL) {
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190 return NULL;
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191 }
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192
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193 cscf->imap_client_buffer_size = NGX_CONF_UNSET_SIZE;
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136
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194 cscf->protocol = NGX_CONF_UNSET_UINT;
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76
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195 cscf->timeout = NGX_CONF_UNSET_MSEC;
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136
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196 cscf->so_keepalive = NGX_CONF_UNSET;
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76
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197
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198 if (ngx_array_init(&cscf->pop3_capabilities, cf->pool, 4, sizeof(ngx_str_t))
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199 != NGX_OK)
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200 {
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201 return NULL;
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202 }
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203
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204 if (ngx_array_init(&cscf->imap_capabilities, cf->pool, 4, sizeof(ngx_str_t))
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205 != NGX_OK)
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206 {
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207 return NULL;
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208 }
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209
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210 return cscf;
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211 }
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212
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213
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214 static char *
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215 ngx_imap_core_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child)
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216 {
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217 ngx_imap_core_srv_conf_t *prev = parent;
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218 ngx_imap_core_srv_conf_t *conf = child;
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219
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132
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220 u_char *p;
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76
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221 size_t size;
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222 ngx_str_t *c, *d;
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223 ngx_uint_t i;
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224
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225 ngx_conf_merge_size_value(conf->imap_client_buffer_size,
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226 prev->imap_client_buffer_size,
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227 (size_t) ngx_pagesize);
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228 ngx_conf_merge_msec_value(conf->timeout, prev->timeout, 60000);
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212
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229 ngx_conf_merge_uint_value(conf->protocol, prev->protocol,
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76
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230 NGX_IMAP_IMAP_PROTOCOL);
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136
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231 ngx_conf_merge_value(conf->so_keepalive, prev->so_keepalive, 0);
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76
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232
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233
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250
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234 ngx_conf_merge_bitmask_value(conf->auth_methods, prev->auth_methods,
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235 (NGX_CONF_BITMASK_SET|NGX_IMAP_AUTH_PLAIN_ENABLED));
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236
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237
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238 ngx_conf_merge_str_value(conf->server_name, prev->server_name, "");
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239
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240 if (conf->server_name.len == 0) {
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241 conf->server_name.data = ngx_palloc(cf->pool, NGX_MAXHOSTNAMELEN);
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242 if (conf->server_name.data == NULL) {
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243 return NGX_CONF_ERROR;
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244 }
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245
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246 if (gethostname((char *) conf->server_name.data, NGX_MAXHOSTNAMELEN)
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247 == -1)
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248 {
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249 ngx_conf_log_error(NGX_LOG_EMERG, cf, ngx_errno,
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250 "gethostname() failed");
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251 return NGX_CONF_ERROR;
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252 }
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253
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254 conf->server_name.len = ngx_strlen(conf->server_name.data);
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255 }
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256
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257
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76
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258 if (conf->pop3_capabilities.nelts == 0) {
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259 conf->pop3_capabilities = prev->pop3_capabilities;
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260 }
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261
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262 if (conf->pop3_capabilities.nelts == 0) {
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263
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264 for (d = ngx_pop3_default_capabilities; d->len; d++) {
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265 c = ngx_array_push(&conf->pop3_capabilities);
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266 if (c == NULL) {
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267 return NGX_CONF_ERROR;
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268 }
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269
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270 *c = *d;
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271 }
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272 }
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273
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274 size = sizeof("+OK Capability list follows" CRLF) - 1
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275 + sizeof("." CRLF) - 1;
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276
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277 c = conf->pop3_capabilities.elts;
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278 for (i = 0; i < conf->pop3_capabilities.nelts; i++) {
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279 size += c[i].len + sizeof(CRLF) - 1;
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280 }
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281
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132
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282 p = ngx_palloc(cf->pool, size);
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283 if (p == NULL) {
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76
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284 return NGX_CONF_ERROR;
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285 }
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286
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132
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287 conf->pop3_capability.len = size;
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288 conf->pop3_capability.data = p;
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289
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290 p = ngx_cpymem(p, "+OK Capability list follows" CRLF,
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291 sizeof("+OK Capability list follows" CRLF) - 1);
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76
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292
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293 for (i = 0; i < conf->pop3_capabilities.nelts; i++) {
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132
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294 p = ngx_cpymem(p, c[i].data, c[i].len);
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295 *p++ = CR; *p++ = LF;
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76
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296 }
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297
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132
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298 *p++ = '.'; *p++ = CR; *p = LF;
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299
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300
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301 size += sizeof("STLS" CRLF) - 1;
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76
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302
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132
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303 p = ngx_palloc(cf->pool, size);
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304 if (p == NULL) {
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305 return NGX_CONF_ERROR;
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306 }
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307
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308 conf->pop3_starttls_capability.len = size;
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309 conf->pop3_starttls_capability.data = p;
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310
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311 p = ngx_cpymem(p, conf->pop3_capability.data,
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312 conf->pop3_capability.len - (sizeof("." CRLF) - 1));
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313
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314 p = ngx_cpymem(p, "STLS" CRLF, sizeof("STLS" CRLF) - 1);
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315 *p++ = '.'; *p++ = CR; *p = LF;
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76
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316
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317
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318 if (conf->imap_capabilities.nelts == 0) {
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319 conf->imap_capabilities = prev->imap_capabilities;
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320 }
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321
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322 if (conf->imap_capabilities.nelts == 0) {
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323
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324 for (d = ngx_imap_default_capabilities; d->len; d++) {
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325 c = ngx_array_push(&conf->imap_capabilities);
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326 if (c == NULL) {
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327 return NGX_CONF_ERROR;
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328 }
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329
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330 *c = *d;
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331 }
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332 }
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333
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334 size = sizeof("* CAPABILITY") - 1 + sizeof(CRLF) - 1;
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335
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336 c = conf->imap_capabilities.elts;
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337 for (i = 0; i < conf->imap_capabilities.nelts; i++) {
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338 size += 1 + c[i].len;
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339 }
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340
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132
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341 p = ngx_palloc(cf->pool, size);
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342 if (p == NULL) {
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343 return NGX_CONF_ERROR;
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344 }
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345
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346 conf->imap_capability.len = size;
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347 conf->imap_capability.data = p;
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348
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349 p = ngx_cpymem(p, "* CAPABILITY", sizeof("* CAPABILITY") - 1);
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350
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351 for (i = 0; i < conf->imap_capabilities.nelts; i++) {
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352 *p++ = ' ';
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353 p = ngx_cpymem(p, c[i].data, c[i].len);
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354 }
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355
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356 *p++ = CR; *p = LF;
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357
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358
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359 size += sizeof(" STARTTLS") - 1;
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360
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361 p = ngx_palloc(cf->pool, size);
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362 if (p == NULL) {
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76
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363 return NGX_CONF_ERROR;
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364 }
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365
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132
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366 conf->imap_starttls_capability.len = size;
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367 conf->imap_starttls_capability.data = p;
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76
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368
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132
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369 p = ngx_cpymem(p, conf->imap_capability.data,
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370 conf->imap_capability.len - (sizeof(CRLF) - 1));
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371 p = ngx_cpymem(p, " STARTTLS", sizeof(" STARTTLS") - 1);
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372 *p++ = CR; *p = LF;
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373
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374
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375 size += sizeof(" LOGINDISABLED") - 1;
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376
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377 p = ngx_palloc(cf->pool, size);
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378 if (p == NULL) {
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379 return NGX_CONF_ERROR;
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|
76
|
380 }
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381
|
|
132
|
382 conf->imap_starttls_only_capability.len = size;
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|
|
383 conf->imap_starttls_only_capability.data = p;
|
|
76
|
384
|
|
132
|
385 p = ngx_cpymem(p, conf->imap_starttls_capability.data,
|
|
|
386 conf->imap_starttls_capability.len - (sizeof(CRLF) - 1));
|
|
|
387 p = ngx_cpymem(p, " LOGINDISABLED", sizeof(" LOGINDISABLED") - 1);
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|
|
388 *p++ = CR; *p = LF;
|
|
|
389
|
|
76
|
390
|
|
|
391 return NGX_CONF_OK;
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|
|
392 }
|
|
|
393
|
|
|
394
|
|
|
395 static char *
|
|
|
396 ngx_imap_core_server(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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|
|
397 {
|
|
|
398 char *rv;
|
|
|
399 void *mconf;
|
|
|
400 ngx_uint_t m;
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|
|
401 ngx_conf_t pcf;
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|
|
402 ngx_imap_module_t *module;
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|
|
403 ngx_imap_conf_ctx_t *ctx, *imap_ctx;
|
|
|
404 ngx_imap_core_srv_conf_t *cscf, **cscfp;
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|
|
405 ngx_imap_core_main_conf_t *cmcf;
|
|
|
406
|
|
|
407
|
|
|
408 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_imap_conf_ctx_t));
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|
|
409 if (ctx == NULL) {
|
|
|
410 return NGX_CONF_ERROR;
|
|
|
411 }
|
|
|
412
|
|
|
413 imap_ctx = cf->ctx;
|
|
|
414 ctx->main_conf = imap_ctx->main_conf;
|
|
126
|
415
|
|
76
|
416 /* the server{}'s srv_conf */
|
|
|
417
|
|
|
418 ctx->srv_conf = ngx_pcalloc(cf->pool, sizeof(void *) * ngx_imap_max_module);
|
|
|
419 if (ctx->srv_conf == NULL) {
|
|
|
420 return NGX_CONF_ERROR;
|
|
|
421 }
|
|
|
422
|
|
|
423 for (m = 0; ngx_modules[m]; m++) {
|
|
|
424 if (ngx_modules[m]->type != NGX_IMAP_MODULE) {
|
|
|
425 continue;
|
|
|
426 }
|
|
|
427
|
|
|
428 module = ngx_modules[m]->ctx;
|
|
|
429
|
|
|
430 if (module->create_srv_conf) {
|
|
|
431 mconf = module->create_srv_conf(cf);
|
|
|
432 if (mconf == NULL) {
|
|
|
433 return NGX_CONF_ERROR;
|
|
|
434 }
|
|
|
435
|
|
|
436 ctx->srv_conf[ngx_modules[m]->ctx_index] = mconf;
|
|
|
437 }
|
|
|
438 }
|
|
|
439
|
|
|
440 /* the server configuration context */
|
|
|
441
|
|
|
442 cscf = ctx->srv_conf[ngx_imap_core_module.ctx_index];
|
|
|
443 cscf->ctx = ctx;
|
|
|
444
|
|
|
445 cmcf = ctx->main_conf[ngx_imap_core_module.ctx_index];
|
|
|
446
|
|
|
447 cscfp = ngx_array_push(&cmcf->servers);
|
|
|
448 if (cscfp == NULL) {
|
|
|
449 return NGX_CONF_ERROR;
|
|
|
450 }
|
|
|
451
|
|
|
452 *cscfp = cscf;
|
|
|
453
|
|
|
454
|
|
|
455 /* parse inside server{} */
|
|
|
456
|
|
|
457 pcf = *cf;
|
|
|
458 cf->ctx = ctx;
|
|
|
459 cf->cmd_type = NGX_IMAP_SRV_CONF;
|
|
|
460
|
|
|
461 rv = ngx_conf_parse(cf, NULL);
|
|
|
462
|
|
|
463 *cf = pcf;
|
|
|
464
|
|
|
465 return rv;
|
|
|
466 }
|
|
|
467
|
|
|
468
|
|
|
469 /* AF_INET only */
|
|
|
470
|
|
|
471 static char *
|
|
|
472 ngx_imap_core_listen(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
473 {
|
|
190
|
474 char *err;
|
|
|
475 ngx_str_t *value;
|
|
|
476 in_addr_t in_addr;
|
|
|
477 ngx_uint_t i;
|
|
|
478 struct hostent *h;
|
|
|
479 ngx_imap_listen_t *imls;
|
|
|
480 ngx_inet_upstream_t inet_upstream;
|
|
|
481 ngx_imap_core_main_conf_t *cmcf;
|
|
76
|
482
|
|
|
483 value = cf->args->elts;
|
|
|
484
|
|
|
485 ngx_memzero(&inet_upstream, sizeof(ngx_inet_upstream_t));
|
|
|
486
|
|
|
487 inet_upstream.url = value[1];
|
|
|
488 inet_upstream.port_only = 1;
|
|
|
489
|
|
|
490 err = ngx_inet_parse_host_port(&inet_upstream);
|
|
|
491
|
|
|
492 if (err) {
|
|
|
493 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
494 "%s in \"%V\" of the \"listen\" directive",
|
|
|
495 err, &inet_upstream.url);
|
|
|
496 return NGX_CONF_ERROR;
|
|
|
497 }
|
|
|
498
|
|
168
|
499 if (inet_upstream.host.len == 1 && inet_upstream.host.data[0] == '*') {
|
|
|
500 inet_upstream.host.len = 0;
|
|
|
501 }
|
|
|
502
|
|
76
|
503 if (inet_upstream.host.len) {
|
|
|
504 inet_upstream.host.data[inet_upstream.host.len] = '\0';
|
|
|
505
|
|
|
506 in_addr = inet_addr((const char *) inet_upstream.host.data);
|
|
|
507
|
|
|
508 if (in_addr == INADDR_NONE) {
|
|
|
509 h = gethostbyname((const char *) inet_upstream.host.data);
|
|
126
|
510
|
|
76
|
511 if (h == NULL || h->h_addr_list[0] == NULL) {
|
|
|
512 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
513 "can not resolve host \"%s\" "
|
|
|
514 "in the \"listen\" directive",
|
|
|
515 inet_upstream.host.data);
|
|
|
516 return NGX_CONF_ERROR;
|
|
|
517 }
|
|
|
518
|
|
|
519 in_addr = *(in_addr_t *)(h->h_addr_list[0]);
|
|
|
520 }
|
|
|
521
|
|
|
522 } else {
|
|
|
523 in_addr = INADDR_ANY;
|
|
|
524 }
|
|
|
525
|
|
190
|
526 cmcf = ngx_imap_conf_get_module_main_conf(cf, ngx_imap_core_module);
|
|
76
|
527
|
|
190
|
528 imls = cmcf->listen.elts;
|
|
|
529
|
|
|
530 for (i = 0; i < cmcf->listen.nelts; i++) {
|
|
|
531
|
|
|
532 if (imls[i].addr != in_addr || imls[i].port != inet_upstream.port) {
|
|
|
533 continue;
|
|
|
534 }
|
|
|
535
|
|
|
536 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
537 "duplicate \"%V\" address and port pair",
|
|
|
538 &inet_upstream.url);
|
|
126
|
539 return NGX_CONF_ERROR;
|
|
76
|
540 }
|
|
|
541
|
|
190
|
542 imls = ngx_array_push(&cmcf->listen);
|
|
|
543 if (imls == NULL) {
|
|
|
544 return NGX_CONF_ERROR;
|
|
|
545 }
|
|
112
|
546
|
|
190
|
547 ngx_memzero(imls, sizeof(ngx_imap_listen_t));
|
|
|
548
|
|
|
549 imls->addr = in_addr;
|
|
|
550 imls->port = inet_upstream.port;
|
|
|
551 imls->family = AF_INET;
|
|
|
552 imls->ctx = cf->ctx;
|
|
76
|
553
|
|
190
|
554 if (cf->args->nelts == 2) {
|
|
|
555 return NGX_CONF_OK;
|
|
|
556 }
|
|
76
|
557
|
|
190
|
558 if (ngx_strcmp(value[2].data, "bind") == 0) {
|
|
|
559 imls->bind = 1;
|
|
|
560 return NGX_CONF_OK;
|
|
|
561 }
|
|
76
|
562
|
|
190
|
563 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
564 "the invalid \"%V\" parameter", &value[2]);
|
|
|
565 return NGX_CONF_ERROR;
|
|
76
|
566 }
|
|
|
567
|
|
|
568
|
|
|
569 static char *
|
|
|
570 ngx_imap_core_capability(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
571 {
|
|
|
572 char *p = conf;
|
|
|
573
|
|
|
574 ngx_str_t *c, *value;
|
|
|
575 ngx_uint_t i;
|
|
|
576 ngx_array_t *a;
|
|
|
577
|
|
|
578 a = (ngx_array_t *) (p + cmd->offset);
|
|
|
579
|
|
|
580 value = cf->args->elts;
|
|
|
581
|
|
|
582 for (i = 1; i < cf->args->nelts; i++) {
|
|
|
583 c = ngx_array_push(a);
|
|
|
584 if (c == NULL) {
|
|
|
585 return NGX_CONF_ERROR;
|
|
|
586 }
|
|
|
587
|
|
|
588 *c = value[i];
|
|
|
589 }
|
|
|
590
|
|
|
591 return NGX_CONF_OK;
|
|
|
592 }
|
