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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252
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51 { ngx_string("cram-md5"), NGX_IMAP_AUTH_CRAM_MD5_ENABLED },
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250
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52 { ngx_null_string, 0 }
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53 };
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54
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55
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252
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56 static ngx_str_t ngx_pop3_auth_plain_capability =
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57 ngx_string("+OK methods supported:" CRLF
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58 "LOGIN" CRLF
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59 "PLAIN" CRLF
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60 "." CRLF);
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61
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62
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63 static ngx_str_t ngx_pop3_auth_cram_md5_capability =
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64 ngx_string("+OK methods supported:" CRLF
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65 "LOGIN" CRLF
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66 "PLAIN" CRLF
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67 "CRAM-MD5" CRLF
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68 "." CRLF);
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69
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70
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71
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76
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72 static ngx_command_t ngx_imap_core_commands[] = {
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73
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74 { ngx_string("server"),
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75 NGX_IMAP_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS,
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76 ngx_imap_core_server,
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77 0,
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78 0,
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79 NULL },
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80
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81 { ngx_string("listen"),
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190
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82 NGX_IMAP_SRV_CONF|NGX_CONF_TAKE12,
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76
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83 ngx_imap_core_listen,
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84 0,
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85 0,
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86 NULL },
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87
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88 { ngx_string("protocol"),
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89 NGX_IMAP_SRV_CONF|NGX_CONF_TAKE1,
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90 ngx_conf_set_enum_slot,
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91 NGX_IMAP_SRV_CONF_OFFSET,
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92 offsetof(ngx_imap_core_srv_conf_t, protocol),
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93 &ngx_imap_core_procotol },
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94
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95 { ngx_string("imap_client_buffer"),
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96 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_TAKE1,
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97 ngx_conf_set_size_slot,
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98 NGX_IMAP_SRV_CONF_OFFSET,
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99 offsetof(ngx_imap_core_srv_conf_t, imap_client_buffer_size),
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100 NULL },
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101
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136
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102 { ngx_string("so_keepalive"),
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103 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_FLAG,
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104 ngx_conf_set_flag_slot,
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105 NGX_IMAP_SRV_CONF_OFFSET,
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106 offsetof(ngx_imap_core_srv_conf_t, so_keepalive),
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107 NULL },
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108
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76
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109 { ngx_string("timeout"),
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110 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_TAKE1,
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111 ngx_conf_set_msec_slot,
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112 NGX_IMAP_SRV_CONF_OFFSET,
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113 offsetof(ngx_imap_core_srv_conf_t, timeout),
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114 NULL },
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115
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116 { ngx_string("pop3_capabilities"),
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117 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_1MORE,
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118 ngx_imap_core_capability,
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119 NGX_IMAP_SRV_CONF_OFFSET,
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120 offsetof(ngx_imap_core_srv_conf_t, pop3_capabilities),
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121 NULL },
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122
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123 { ngx_string("imap_capabilities"),
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124 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_1MORE,
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125 ngx_imap_core_capability,
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126 NGX_IMAP_SRV_CONF_OFFSET,
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127 offsetof(ngx_imap_core_srv_conf_t, imap_capabilities),
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128 NULL },
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129
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250
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130 { ngx_string("server_name"),
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131 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_TAKE1,
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132 ngx_conf_set_str_slot,
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133 NGX_IMAP_SRV_CONF_OFFSET,
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134 offsetof(ngx_imap_core_srv_conf_t, server_name),
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135 NULL },
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136
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137 { ngx_string("auth"),
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138 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_1MORE,
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139 ngx_conf_set_bitmask_slot,
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140 NGX_IMAP_SRV_CONF_OFFSET,
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141 offsetof(ngx_imap_core_srv_conf_t, auth_methods),
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142 &ngx_imap_auth_methods },
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143
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76
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144 ngx_null_command
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145 };
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146
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147
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148 static ngx_imap_module_t ngx_imap_core_module_ctx = {
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149 ngx_imap_core_create_main_conf, /* create main configuration */
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150 NULL, /* init main configuration */
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151
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152 ngx_imap_core_create_srv_conf, /* create server configuration */
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153 ngx_imap_core_merge_srv_conf /* merge server configuration */
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154 };
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155
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156
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157 ngx_module_t ngx_imap_core_module = {
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158 NGX_MODULE_V1,
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159 &ngx_imap_core_module_ctx, /* module context */
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160 ngx_imap_core_commands, /* module directives */
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161 NGX_IMAP_MODULE, /* module type */
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90
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162 NULL, /* init master */
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163 NULL, /* init module */
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90
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164 NULL, /* init process */
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165 NULL, /* init thread */
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166 NULL, /* exit thread */
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167 NULL, /* exit process */
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168 NULL, /* exit master */
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169 NGX_MODULE_V1_PADDING
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76
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170 };
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171
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172
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173 static void *
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174 ngx_imap_core_create_main_conf(ngx_conf_t *cf)
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126
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175 {
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76
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176 ngx_imap_core_main_conf_t *cmcf;
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177
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178 cmcf = ngx_pcalloc(cf->pool, sizeof(ngx_imap_core_main_conf_t));
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179 if (cmcf == 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 if (ngx_array_init(&cmcf->servers, cf->pool, 4,
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190
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184 sizeof(ngx_imap_core_srv_conf_t *))
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185 != NGX_OK)
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186 {
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187 return NGX_CONF_ERROR;
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188 }
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189
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190 if (ngx_array_init(&cmcf->listen, cf->pool, 4, sizeof(ngx_imap_listen_t))
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191 != NGX_OK)
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76
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192 {
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193 return NGX_CONF_ERROR;
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194 }
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195
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196 return cmcf;
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197 }
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198
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199
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200 static void *
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201 ngx_imap_core_create_srv_conf(ngx_conf_t *cf)
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126
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202 {
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203 ngx_imap_core_srv_conf_t *cscf;
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126
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204
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205 cscf = ngx_pcalloc(cf->pool, sizeof(ngx_imap_core_srv_conf_t));
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206 if (cscf == NULL) {
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207 return NULL;
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208 }
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209
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210 cscf->imap_client_buffer_size = NGX_CONF_UNSET_SIZE;
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211 cscf->protocol = NGX_CONF_UNSET_UINT;
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212 cscf->timeout = NGX_CONF_UNSET_MSEC;
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136
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213 cscf->so_keepalive = NGX_CONF_UNSET;
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214
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215 if (ngx_array_init(&cscf->pop3_capabilities, cf->pool, 4, sizeof(ngx_str_t))
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216 != NGX_OK)
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217 {
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218 return NULL;
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219 }
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220
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221 if (ngx_array_init(&cscf->imap_capabilities, cf->pool, 4, sizeof(ngx_str_t))
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222 != NGX_OK)
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223 {
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224 return NULL;
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225 }
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226
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227 return cscf;
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228 }
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229
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230
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231 static char *
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232 ngx_imap_core_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child)
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233 {
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234 ngx_imap_core_srv_conf_t *prev = parent;
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235 ngx_imap_core_srv_conf_t *conf = child;
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236
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132
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237 u_char *p;
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238 size_t size;
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239 ngx_str_t *c, *d;
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240 ngx_uint_t i;
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241
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242 ngx_conf_merge_size_value(conf->imap_client_buffer_size,
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243 prev->imap_client_buffer_size,
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244 (size_t) ngx_pagesize);
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245 ngx_conf_merge_msec_value(conf->timeout, prev->timeout, 60000);
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212
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246 ngx_conf_merge_uint_value(conf->protocol, prev->protocol,
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247 NGX_IMAP_IMAP_PROTOCOL);
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248 ngx_conf_merge_value(conf->so_keepalive, prev->so_keepalive, 0);
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249
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250
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250
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251 ngx_conf_merge_bitmask_value(conf->auth_methods, prev->auth_methods,
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252 (NGX_CONF_BITMASK_SET|NGX_IMAP_AUTH_PLAIN_ENABLED));
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253
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254
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255 ngx_conf_merge_str_value(conf->server_name, prev->server_name, "");
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256
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257 if (conf->server_name.len == 0) {
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258 conf->server_name.data = ngx_palloc(cf->pool, NGX_MAXHOSTNAMELEN);
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259 if (conf->server_name.data == NULL) {
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260 return NGX_CONF_ERROR;
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261 }
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262
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263 if (gethostname((char *) conf->server_name.data, NGX_MAXHOSTNAMELEN)
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264 == -1)
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265 {
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266 ngx_conf_log_error(NGX_LOG_EMERG, cf, ngx_errno,
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267 "gethostname() failed");
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268 return NGX_CONF_ERROR;
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269 }
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270
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271 conf->server_name.len = ngx_strlen(conf->server_name.data);
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272 }
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273
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274
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275 if (conf->pop3_capabilities.nelts == 0) {
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276 conf->pop3_capabilities = prev->pop3_capabilities;
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277 }
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278
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279 if (conf->pop3_capabilities.nelts == 0) {
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280
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281 for (d = ngx_pop3_default_capabilities; d->len; d++) {
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282 c = ngx_array_push(&conf->pop3_capabilities);
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283 if (c == NULL) {
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284 return NGX_CONF_ERROR;
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285 }
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286
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287 *c = *d;
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288 }
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289 }
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290
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291 size = sizeof("+OK Capability list follows" CRLF) - 1
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292 + sizeof("." CRLF) - 1;
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293
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294 c = conf->pop3_capabilities.elts;
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295 for (i = 0; i < conf->pop3_capabilities.nelts; i++) {
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296 size += c[i].len + sizeof(CRLF) - 1;
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297 }
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298
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252
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299 if (conf->auth_methods & NGX_IMAP_AUTH_CRAM_MD5_ENABLED) {
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300 size += sizeof("SASL LOGIN PLAIN CRAM-MD5" CRLF) - 1;
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301
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302 } else {
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303 size += sizeof("SASL LOGIN PLAIN" CRLF) - 1;
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304 }
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305
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132
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306 p = ngx_palloc(cf->pool, size);
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307 if (p == NULL) {
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308 return NGX_CONF_ERROR;
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309 }
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310
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132
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311 conf->pop3_capability.len = size;
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312 conf->pop3_capability.data = p;
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313
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314 p = ngx_cpymem(p, "+OK Capability list follows" CRLF,
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315 sizeof("+OK Capability list follows" CRLF) - 1);
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316
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317 for (i = 0; i < conf->pop3_capabilities.nelts; i++) {
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132
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318 p = ngx_cpymem(p, c[i].data, c[i].len);
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319 *p++ = CR; *p++ = LF;
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76
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320 }
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321
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252
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322 if (conf->auth_methods & NGX_IMAP_AUTH_CRAM_MD5_ENABLED) {
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323 p = ngx_cpymem(p, "SASL LOGIN PLAIN CRAM-MD5" CRLF,
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324 sizeof("SASL LOGIN PLAIN CRAM-MD5" CRLF) - 1);
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325
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326 } else {
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327 p = ngx_cpymem(p, "SASL LOGIN PLAIN" CRLF,
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328 sizeof("SASL LOGIN PLAIN" CRLF) - 1);
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329 }
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330
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132
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331 *p++ = '.'; *p++ = CR; *p = LF;
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332
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333
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334 size += sizeof("STLS" CRLF) - 1;
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335
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132
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336 p = ngx_palloc(cf->pool, size);
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337 if (p == NULL) {
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338 return NGX_CONF_ERROR;
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339 }
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340
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341 conf->pop3_starttls_capability.len = size;
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342 conf->pop3_starttls_capability.data = p;
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343
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344 p = ngx_cpymem(p, conf->pop3_capability.data,
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345 conf->pop3_capability.len - (sizeof("." CRLF) - 1));
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346
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347 p = ngx_cpymem(p, "STLS" CRLF, sizeof("STLS" CRLF) - 1);
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348 *p++ = '.'; *p++ = CR; *p = LF;
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76
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349
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350
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252
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351 if (conf->auth_methods & NGX_IMAP_AUTH_CRAM_MD5_ENABLED) {
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352 conf->pop3_auth_capability = ngx_pop3_auth_cram_md5_capability;
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353
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354 } else {
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355 conf->pop3_auth_capability = ngx_pop3_auth_plain_capability;
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356 }
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357
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358
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76
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359 if (conf->imap_capabilities.nelts == 0) {
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360 conf->imap_capabilities = prev->imap_capabilities;
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361 }
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362
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363 if (conf->imap_capabilities.nelts == 0) {
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364
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365 for (d = ngx_imap_default_capabilities; d->len; d++) {
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366 c = ngx_array_push(&conf->imap_capabilities);
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367 if (c == NULL) {
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368 return NGX_CONF_ERROR;
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369 }
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370
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371 *c = *d;
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372 }
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373 }
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374
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375 size = sizeof("* CAPABILITY") - 1 + sizeof(CRLF) - 1;
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376
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377 c = conf->imap_capabilities.elts;
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378 for (i = 0; i < conf->imap_capabilities.nelts; i++) {
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379 size += 1 + c[i].len;
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380 }
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381
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132
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382 p = ngx_palloc(cf->pool, size);
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383 if (p == NULL) {
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384 return NGX_CONF_ERROR;
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385 }
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386
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387 conf->imap_capability.len = size;
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388 conf->imap_capability.data = p;
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389
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390 p = ngx_cpymem(p, "* CAPABILITY", sizeof("* CAPABILITY") - 1);
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391
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392 for (i = 0; i < conf->imap_capabilities.nelts; i++) {
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393 *p++ = ' ';
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394 p = ngx_cpymem(p, c[i].data, c[i].len);
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395 }
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396
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397 *p++ = CR; *p = LF;
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398
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399
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400 size += sizeof(" STARTTLS") - 1;
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401
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402 p = ngx_palloc(cf->pool, size);
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403 if (p == NULL) {
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76
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404 return NGX_CONF_ERROR;
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405 }
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406
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132
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407 conf->imap_starttls_capability.len = size;
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408 conf->imap_starttls_capability.data = p;
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76
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409
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132
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410 p = ngx_cpymem(p, conf->imap_capability.data,
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411 conf->imap_capability.len - (sizeof(CRLF) - 1));
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412 p = ngx_cpymem(p, " STARTTLS", sizeof(" STARTTLS") - 1);
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413 *p++ = CR; *p = LF;
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414
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415
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416 size += sizeof(" LOGINDISABLED") - 1;
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417
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418 p = ngx_palloc(cf->pool, size);
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419 if (p == NULL) {
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420 return NGX_CONF_ERROR;
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76
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421 }
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422
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132
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423 conf->imap_starttls_only_capability.len = size;
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424 conf->imap_starttls_only_capability.data = p;
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425
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132
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426 p = ngx_cpymem(p, conf->imap_starttls_capability.data,
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427 conf->imap_starttls_capability.len - (sizeof(CRLF) - 1));
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428 p = ngx_cpymem(p, " LOGINDISABLED", sizeof(" LOGINDISABLED") - 1);
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429 *p++ = CR; *p = LF;
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430
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76
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431
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432 return NGX_CONF_OK;
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433 }
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434
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435
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436 static char *
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437 ngx_imap_core_server(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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438 {
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439 char *rv;
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440 void *mconf;
|
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441 ngx_uint_t m;
|
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442 ngx_conf_t pcf;
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443 ngx_imap_module_t *module;
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444 ngx_imap_conf_ctx_t *ctx, *imap_ctx;
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445 ngx_imap_core_srv_conf_t *cscf, **cscfp;
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446 ngx_imap_core_main_conf_t *cmcf;
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447
|
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448
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449 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_imap_conf_ctx_t));
|
|
450 if (ctx == NULL) {
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|
451 return NGX_CONF_ERROR;
|
|
452 }
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|
453
|
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454 imap_ctx = cf->ctx;
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455 ctx->main_conf = imap_ctx->main_conf;
|
126
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456
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76
|
457 /* the server{}'s srv_conf */
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458
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459 ctx->srv_conf = ngx_pcalloc(cf->pool, sizeof(void *) * ngx_imap_max_module);
|
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460 if (ctx->srv_conf == NULL) {
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461 return NGX_CONF_ERROR;
|
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462 }
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463
|
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464 for (m = 0; ngx_modules[m]; m++) {
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465 if (ngx_modules[m]->type != NGX_IMAP_MODULE) {
|
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466 continue;
|
|
467 }
|
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468
|
|
469 module = ngx_modules[m]->ctx;
|
|
470
|
|
471 if (module->create_srv_conf) {
|
|
472 mconf = module->create_srv_conf(cf);
|
|
473 if (mconf == NULL) {
|
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474 return NGX_CONF_ERROR;
|
|
475 }
|
|
476
|
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477 ctx->srv_conf[ngx_modules[m]->ctx_index] = mconf;
|
|
478 }
|
|
479 }
|
|
480
|
|
481 /* the server configuration context */
|
|
482
|
|
483 cscf = ctx->srv_conf[ngx_imap_core_module.ctx_index];
|
|
484 cscf->ctx = ctx;
|
|
485
|
|
486 cmcf = ctx->main_conf[ngx_imap_core_module.ctx_index];
|
|
487
|
|
488 cscfp = ngx_array_push(&cmcf->servers);
|
|
489 if (cscfp == NULL) {
|
|
490 return NGX_CONF_ERROR;
|
|
491 }
|
|
492
|
|
493 *cscfp = cscf;
|
|
494
|
|
495
|
|
496 /* parse inside server{} */
|
|
497
|
|
498 pcf = *cf;
|
|
499 cf->ctx = ctx;
|
|
500 cf->cmd_type = NGX_IMAP_SRV_CONF;
|
|
501
|
|
502 rv = ngx_conf_parse(cf, NULL);
|
|
503
|
|
504 *cf = pcf;
|
|
505
|
|
506 return rv;
|
|
507 }
|
|
508
|
|
509
|
|
510 /* AF_INET only */
|
|
511
|
|
512 static char *
|
|
513 ngx_imap_core_listen(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
514 {
|
190
|
515 ngx_str_t *value;
|
252
|
516 ngx_url_t u;
|
190
|
517 ngx_uint_t i;
|
|
518 ngx_imap_listen_t *imls;
|
|
519 ngx_imap_core_main_conf_t *cmcf;
|
76
|
520
|
|
521 value = cf->args->elts;
|
|
522
|
252
|
523 ngx_memzero(&u, sizeof(ngx_url_t));
|
76
|
524
|
252
|
525 u.url = value[1];
|
|
526 u.listen = 1;
|
168
|
527
|
252
|
528 if (ngx_parse_url(cf, &u) != NGX_OK) {
|
|
529 if (u.err) {
|
|
530 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
531 "%s in \"%V\" of the \"listen\" directive",
|
|
532 u.err, &u.url);
|
76
|
533 }
|
|
534
|
252
|
535 return NGX_CONF_ERROR;
|
76
|
536 }
|
|
537
|
190
|
538 cmcf = ngx_imap_conf_get_module_main_conf(cf, ngx_imap_core_module);
|
76
|
539
|
190
|
540 imls = cmcf->listen.elts;
|
|
541
|
|
542 for (i = 0; i < cmcf->listen.nelts; i++) {
|
|
543
|
266
|
544 if (imls[i].addr != u.addr.in_addr || imls[i].port != u.port) {
|
190
|
545 continue;
|
|
546 }
|
|
547
|
|
548 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
252
|
549 "duplicate \"%V\" address and port pair", &u.url);
|
126
|
550 return NGX_CONF_ERROR;
|
76
|
551 }
|
|
552
|
190
|
553 imls = ngx_array_push(&cmcf->listen);
|
|
554 if (imls == NULL) {
|
|
555 return NGX_CONF_ERROR;
|
|
556 }
|
112
|
557
|
190
|
558 ngx_memzero(imls, sizeof(ngx_imap_listen_t));
|
|
559
|
252
|
560 imls->addr = u.addr.in_addr;
|
266
|
561 imls->port = u.port;
|
190
|
562 imls->family = AF_INET;
|
|
563 imls->ctx = cf->ctx;
|
76
|
564
|
190
|
565 if (cf->args->nelts == 2) {
|
|
566 return NGX_CONF_OK;
|
|
567 }
|
76
|
568
|
190
|
569 if (ngx_strcmp(value[2].data, "bind") == 0) {
|
|
570 imls->bind = 1;
|
|
571 return NGX_CONF_OK;
|
|
572 }
|
76
|
573
|
190
|
574 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
575 "the invalid \"%V\" parameter", &value[2]);
|
|
576 return NGX_CONF_ERROR;
|
76
|
577 }
|
|
578
|
|
579
|
|
580 static char *
|
|
581 ngx_imap_core_capability(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
582 {
|
|
583 char *p = conf;
|
|
584
|
|
585 ngx_str_t *c, *value;
|
|
586 ngx_uint_t i;
|
|
587 ngx_array_t *a;
|
|
588
|
|
589 a = (ngx_array_t *) (p + cmd->offset);
|
|
590
|
|
591 value = cf->args->elts;
|
|
592
|
|
593 for (i = 1; i < cf->args->nelts; i++) {
|
|
594 c = ngx_array_push(a);
|
|
595 if (c == NULL) {
|
|
596 return NGX_CONF_ERROR;
|
|
597 }
|
|
598
|
|
599 *c = value[i];
|
|
600 }
|
|
601
|
|
602 return NGX_CONF_OK;
|
|
603 }
|