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