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518
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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_http.h>
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10
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11 #include <GeoIP.h>
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12 #include <GeoIPCity.h>
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13
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14
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15 typedef struct {
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16 GeoIP *country;
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17 GeoIP *city;
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18 } ngx_http_geoip_conf_t;
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19
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20
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21 typedef struct {
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22 ngx_str_t *name;
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23 uintptr_t data;
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24 } ngx_http_geoip_var_t;
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25
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26
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27 typedef const char *(*ngx_http_geoip_variable_handler_pt)(GeoIP *, u_long addr);
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28
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29 static ngx_int_t ngx_http_geoip_country_variable(ngx_http_request_t *r,
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30 ngx_http_variable_value_t *v, uintptr_t data);
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31 static ngx_int_t ngx_http_geoip_city_variable(ngx_http_request_t *r,
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32 ngx_http_variable_value_t *v, uintptr_t data);
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33
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34 static ngx_int_t ngx_http_geoip_add_variables(ngx_conf_t *cf);
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35 static void *ngx_http_geoip_create_conf(ngx_conf_t *cf);
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36 static char *ngx_http_geoip_country(ngx_conf_t *cf, ngx_command_t *cmd,
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37 void *conf);
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38 static char *ngx_http_geoip_city(ngx_conf_t *cf, ngx_command_t *cmd,
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39 void *conf);
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40 static void ngx_http_geoip_cleanup(void *data);
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41
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42
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43 static ngx_command_t ngx_http_geoip_commands[] = {
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44
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45 { ngx_string("geoip_country"),
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46 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
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47 ngx_http_geoip_country,
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48 NGX_HTTP_MAIN_CONF_OFFSET,
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49 0,
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50 NULL },
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51
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52 { ngx_string("geoip_city"),
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53 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
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54 ngx_http_geoip_city,
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55 NGX_HTTP_MAIN_CONF_OFFSET,
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56 0,
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57 NULL },
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58
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59 ngx_null_command
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60 };
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61
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62
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63 static ngx_http_module_t ngx_http_geoip_module_ctx = {
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64 ngx_http_geoip_add_variables, /* preconfiguration */
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65 NULL, /* postconfiguration */
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66
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67 ngx_http_geoip_create_conf, /* create main configuration */
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68 NULL, /* init main configuration */
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69
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70 NULL, /* create server configuration */
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71 NULL, /* merge server configuration */
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72
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73 NULL, /* create location configuration */
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74 NULL /* merge location configuration */
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75 };
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76
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77
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78 ngx_module_t ngx_http_geoip_module = {
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79 NGX_MODULE_V1,
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80 &ngx_http_geoip_module_ctx, /* module context */
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81 ngx_http_geoip_commands, /* module directives */
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82 NGX_HTTP_MODULE, /* module type */
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83 NULL, /* init master */
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84 NULL, /* init module */
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85 NULL, /* init process */
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86 NULL, /* init thread */
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87 NULL, /* exit thread */
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88 NULL, /* exit process */
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89 NULL, /* exit master */
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90 NGX_MODULE_V1_PADDING
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91 };
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92
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93
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94 static ngx_http_variable_t ngx_http_geoip_vars[] = {
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95
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96 { ngx_string("geoip_country_code"), NULL, ngx_http_geoip_country_variable,
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97 (uintptr_t) GeoIP_country_code_by_ipnum, 0, 0 },
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98
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99 { ngx_string("geoip_country_code3"), NULL, ngx_http_geoip_country_variable,
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100 (uintptr_t) GeoIP_country_code3_by_ipnum, 0, 0 },
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101
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102 { ngx_string("geoip_country_name"), NULL, ngx_http_geoip_country_variable,
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103 (uintptr_t) GeoIP_country_name_by_ipnum, 0, 0 },
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104
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105 { ngx_string("geoip_city_country_code"), NULL, ngx_http_geoip_city_variable,
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106 offsetof(GeoIPRecord, country_code), 0, 0 },
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107
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108 { ngx_string("geoip_city_country_code3"), NULL,
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109 ngx_http_geoip_city_variable,
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110 offsetof(GeoIPRecord, country_code3), 0, 0 },
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111
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112 { ngx_string("geoip_city_country_name"), NULL, ngx_http_geoip_city_variable,
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113 offsetof(GeoIPRecord, country_name), 0, 0 },
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114
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115 { ngx_string("geoip_region"), NULL,
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116 ngx_http_geoip_city_variable,
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117 offsetof(GeoIPRecord, region), 0, 0 },
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118
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119 { ngx_string("geoip_city"), NULL,
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120 ngx_http_geoip_city_variable,
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121 offsetof(GeoIPRecord, city), 0, 0 },
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122
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123 { ngx_string("geoip_postal_code"), NULL,
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124 ngx_http_geoip_city_variable,
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125 offsetof(GeoIPRecord, postal_code), 0, 0 },
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126
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127 { ngx_null_string, NULL, NULL, 0, 0, 0 }
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128 };
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129
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130
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131 static ngx_int_t
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132 ngx_http_geoip_country_variable(ngx_http_request_t *r,
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133 ngx_http_variable_value_t *v, uintptr_t data)
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134 {
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135 ngx_http_geoip_variable_handler_pt handler =
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136 (ngx_http_geoip_variable_handler_pt) data;
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137
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138 u_long addr;
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139 const char *val;
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140 struct sockaddr_in *sin;
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141 ngx_http_geoip_conf_t *gcf;
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142
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143 gcf = ngx_http_get_module_main_conf(r, ngx_http_geoip_module);
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144
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145 if (gcf->country == NULL) {
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146 goto not_found;
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147 }
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148
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149 if (r->connection->sockaddr->sa_family != AF_INET) {
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150 goto not_found;
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151 }
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152
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153 sin = (struct sockaddr_in *) r->connection->sockaddr;
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154 addr = ntohl(sin->sin_addr.s_addr);
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155
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156 val = handler(gcf->country, addr);
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157
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158 if (val == NULL) {
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159 goto not_found;
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160 }
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161
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162 v->len = ngx_strlen(val);
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163 v->valid = 1;
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164 v->no_cacheable = 0;
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165 v->not_found = 0;
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166 v->data = (u_char *) val;
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167
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168 return NGX_OK;
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169
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170 not_found:
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171
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172 v->not_found = 1;
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173
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174 return NGX_OK;
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175 }
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176
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177
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178 static ngx_int_t
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179 ngx_http_geoip_city_variable(ngx_http_request_t *r,
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180 ngx_http_variable_value_t *v, uintptr_t data)
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181 {
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182 u_long addr;
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183 char *val;
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184 GeoIPRecord *gr;
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185 struct sockaddr_in *sin;
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186 ngx_http_geoip_conf_t *gcf;
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187
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188 gcf = ngx_http_get_module_main_conf(r, ngx_http_geoip_module);
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189
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190 if (gcf->city == NULL) {
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191 goto not_found;
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192 }
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193
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194 if (r->connection->sockaddr->sa_family != AF_INET) {
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195 goto not_found;
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196 }
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197
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198 sin = (struct sockaddr_in *) r->connection->sockaddr;
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199 addr = ntohl(sin->sin_addr.s_addr);
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200
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201 gr = GeoIP_record_by_ipnum(gcf->city, addr);
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202
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203 if (gr == NULL) {
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204 goto not_found;
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205 }
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206
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207 val = *(char **) ((char *) gr + data);
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208
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209 if (val == NULL) {
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210 goto not_found;
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211 }
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212
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213 v->len = ngx_strlen(val);
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214 v->valid = 1;
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215 v->no_cacheable = 0;
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216 v->not_found = 0;
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217 v->data = (u_char *) val;
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218
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219 return NGX_OK;
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220
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221 not_found:
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222
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223 v->not_found = 1;
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224
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225 return NGX_OK;
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226 }
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227
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228
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229 static ngx_int_t
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230 ngx_http_geoip_add_variables(ngx_conf_t *cf)
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231 {
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232 ngx_http_variable_t *var, *v;
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233
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234 for (v = ngx_http_geoip_vars; v->name.len; v++) {
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235 var = ngx_http_add_variable(cf, &v->name, v->flags);
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236 if (var == NULL) {
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237 return NGX_ERROR;
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238 }
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239
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240 var->get_handler = v->get_handler;
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241 var->data = v->data;
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242 }
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243
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244 return NGX_OK;
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245 }
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246
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247
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248 static void *
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249 ngx_http_geoip_create_conf(ngx_conf_t *cf)
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250 {
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251 ngx_pool_cleanup_t *cln;
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252 ngx_http_geoip_conf_t *conf;
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253
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254 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_geoip_conf_t));
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255 if (conf == NULL) {
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256 return NULL;
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257 }
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258
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259 cln = ngx_pool_cleanup_add(cf->pool, 0);
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260 if (cln == NULL) {
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261 return NULL;
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262 }
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263
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264 cln->handler = ngx_http_geoip_cleanup;
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265 cln->data = conf;
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266
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267 return conf;
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268 }
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269
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270
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271 static char *
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272 ngx_http_geoip_country(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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273 {
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274 ngx_http_geoip_conf_t *gcf = conf;
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275
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276 ngx_str_t *value;
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277
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278 if (gcf->country) {
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279 return "is duplicate";
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280 }
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281
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282 value = cf->args->elts;
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283
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284 gcf->country = GeoIP_open((char *) value[1].data, GEOIP_MEMORY_CACHE);
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285
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286 if (gcf->country == NULL) {
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287 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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288 "GeoIO_open(\"%V\") failed", &value[1]);
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289
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290 return NGX_CONF_ERROR;
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291 }
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292
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293 switch (gcf->country->databaseType) {
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294
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295 case GEOIP_COUNTRY_EDITION:
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296 case GEOIP_PROXY_EDITION:
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297 case GEOIP_NETSPEED_EDITION:
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298
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299 return NGX_CONF_OK;
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300
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301 default:
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302 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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303 "invalid GeoIP database \"%V\" type:%d",
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304 &value[1], gcf->country->databaseType);
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305 return NGX_CONF_ERROR;
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306 }
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307 }
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308
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309
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310 static char *
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311 ngx_http_geoip_city(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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312 {
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313 ngx_http_geoip_conf_t *gcf = conf;
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314
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315 ngx_str_t *value;
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316
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317 if (gcf->city) {
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318 return "is duplicate";
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319 }
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320
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321 value = cf->args->elts;
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322
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323 gcf->city = GeoIP_open((char *) value[1].data, GEOIP_MEMORY_CACHE);
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324
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325 if (gcf->city == NULL) {
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326 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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327 "GeoIO_open(\"%V\") failed", &value[1]);
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328
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329 return NGX_CONF_ERROR;
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330 }
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331
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332 switch (gcf->city->databaseType) {
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333
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334 case GEOIP_CITY_EDITION_REV0:
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335 case GEOIP_CITY_EDITION_REV1:
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336
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337 return NGX_CONF_OK;
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338
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339 default:
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340 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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341 "invalid GeoIP City database \"%V\" type:%d",
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342 &value[1], gcf->city->databaseType);
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343 return NGX_CONF_ERROR;
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344 }
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345 }
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346
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347
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348 static void
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349 ngx_http_geoip_cleanup(void *data)
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350 {
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351 ngx_http_geoip_conf_t *gcf = data;
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352
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353 if (gcf->country) {
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354 GeoIP_delete(gcf->country);
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355 }
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356
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357 if (gcf->city) {
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358 GeoIP_delete(gcf->city);
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359 }
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360 }
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