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34
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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
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12 typedef struct {
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38
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13 ngx_radix_tree_t *tree;
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14 ngx_pool_t *pool;
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15 ngx_array_t values;
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34
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16 } ngx_http_geo_conf_t;
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17
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18
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19 static char *ngx_http_geo_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
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20 static char *ngx_http_geo(ngx_conf_t *cf, ngx_command_t *dummy, void *conf);
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21
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22
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23 static ngx_command_t ngx_http_geo_commands[] = {
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24
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25 { ngx_string("geo"),
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26 NGX_HTTP_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_TAKE1,
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27 ngx_http_geo_block,
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28 NGX_HTTP_MAIN_CONF_OFFSET,
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29 0,
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30 NULL },
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31
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32 ngx_null_command
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33 };
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34
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35
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36 static ngx_http_module_t ngx_http_geo_module_ctx = {
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37 NULL, /* pre conf */
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38
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39 NULL, /* create main configuration */
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40 NULL, /* init main configuration */
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41
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42 NULL, /* create server configuration */
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43 NULL, /* merge server configuration */
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44
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45 NULL, /* create location configuration */
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46 NULL /* merge location configuration */
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47 };
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48
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49
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50 ngx_module_t ngx_http_geo_module = {
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51 NGX_MODULE,
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52 &ngx_http_geo_module_ctx, /* module context */
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53 ngx_http_geo_commands, /* module directives */
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54 NGX_HTTP_MODULE, /* module type */
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55 NULL, /* init module */
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56 NULL /* init process */
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57 };
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58
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59
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60 static ngx_http_variable_value_t ngx_http_geo_null_value =
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61 { 0, ngx_string("0") };
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62
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63
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64 /* AF_INET only */
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65
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66 static ngx_http_variable_value_t *
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67 ngx_http_geo_variable(ngx_http_request_t *r, void *data)
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68 {
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69 ngx_radix_tree_t *tree = data;
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70
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71 struct sockaddr_in *sin;
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72 ngx_http_variable_value_t *var;
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73
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74 sin = (struct sockaddr_in *) r->connection->sockaddr;
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75
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76 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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77 "http geo started");
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78
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79 var = (ngx_http_variable_value_t *)
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80 ngx_radix32tree_find(tree, ntohl(sin->sin_addr.s_addr));
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38
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81
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82 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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83 "http geo: %V %V", &r->connection->addr_text, &var->text);
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84
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85 return var;
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34
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86 }
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87
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88
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38
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89 static char *
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90 ngx_http_geo_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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34
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91 {
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92 char *rv;
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93 ngx_str_t *value;
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94 ngx_conf_t save;
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95 ngx_pool_t *pool;
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96 ngx_radix_tree_t *tree;
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97 ngx_http_geo_conf_t geo;
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98 ngx_http_variable_t *var;
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99
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100 if (!(var = ngx_http_add_variable(cf))) {
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101 return NGX_CONF_ERROR;
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102 }
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103
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104 if (!(tree = ngx_radix_tree_create(cf->pool, -1))) {
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105 return NGX_CONF_ERROR;
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106 }
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107
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108 value = cf->args->elts;
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109
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110 var->name = value[1];
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111 var->handler = ngx_http_geo_variable;
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112 var->data = tree;
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113
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114 /*
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115 * create the temporary pool of a huge initial size
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116 * to process quickly a large number of geo lines
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117 */
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118
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119 if (!(pool = ngx_create_pool(512 * 1024, cf->log))) {
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120 return NGX_CONF_ERROR;
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121 }
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122
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123 if (ngx_array_init(&geo.values, pool, 512,
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124 sizeof(ngx_http_variable_value_t *)) == NGX_ERROR)
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125 {
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126 ngx_destroy_pool(pool);
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127 return NGX_CONF_ERROR;
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128 }
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129
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130 geo.tree = tree;
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131 geo.pool = cf->pool;
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132
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133 save = *cf;
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134 cf->pool = pool;
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135 cf->ctx = &geo;
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136 cf->handler = ngx_http_geo;
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137 cf->handler_conf = conf;
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138
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139 rv = ngx_conf_parse(cf, NULL);
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140
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141 *cf = save;
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142
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143 ngx_destroy_pool(pool);
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144
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145 if (ngx_radix32tree_find(tree, 0) != NGX_RADIX_NO_VALUE) {
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146 return rv;
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147 }
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148
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149 if (ngx_radix32tree_insert(tree, 0, 0,
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150 (uintptr_t) &ngx_http_geo_null_value) == NGX_ERROR)
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151 {
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152 return NGX_CONF_ERROR;
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153 }
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154
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155 return rv;
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156 }
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157
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158
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159 /* AF_INET only */
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160
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38
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161 static char *
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162 ngx_http_geo(ngx_conf_t *cf, ngx_command_t *dummy, void *conf)
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34
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163 {
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164 ngx_int_t rc, n;
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165 ngx_uint_t i;
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166 ngx_str_t *value, file;
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167 ngx_inet_cidr_t cidrin;
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168 ngx_http_geo_conf_t *geo;
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169 ngx_http_variable_value_t *var, **v;
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170
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171 geo = cf->ctx;
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172
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173 if (cf->args->nelts != 2) {
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174 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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175 "invalid number of the geo parameters");
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176 return NGX_CONF_ERROR;
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177 }
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178
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179 value = cf->args->elts;
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180
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181 if (ngx_strcmp(value[0].data, "include") == 0) {
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182 file = value[1];
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183
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184 if (ngx_conf_full_name(cf->cycle, &file) == NGX_ERROR){
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185 return NGX_CONF_ERROR;
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186 }
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187
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188 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cf->log, 0, "include %s", file.data);
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189
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190 return ngx_conf_parse(cf, &file);
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191 }
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192
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193 if (ngx_strcmp(value[0].data, "default") == 0) {
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194 cidrin.addr = 0;
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195 cidrin.mask = 0;
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196
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197 } else {
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198 if (ngx_ptocidr(&value[0], &cidrin) == NGX_ERROR) {
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199 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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200 "invalid parameter \"%V\"", &value[0]);
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201 return NGX_CONF_ERROR;
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202 }
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203
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204 cidrin.addr = ntohl(cidrin.addr);
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205 cidrin.mask = ntohl(cidrin.mask);
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206 }
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207
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208 n = ngx_atoi(value[1].data, value[1].len);
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209
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210 var = NULL;
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211 v = geo->values.elts;
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212
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213 if (n == NGX_ERROR) {
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214 for (i = 0; i < geo->values.nelts; i++) {
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215 if (ngx_strcmp(value[1].data, v[i]->text.data) == 0) {
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216 var = v[i];
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217 break;
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218 }
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219 }
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220
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221 } else {
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222 for (i = 0; i < geo->values.nelts; i++) {
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223 if (v[i]->value == (ngx_uint_t) n) {
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224 var = v[i];
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225 break;
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226 }
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227 }
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228 }
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229
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230 if (i == geo->values.nelts) {
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231 var = ngx_palloc(geo->pool, sizeof(ngx_http_variable_value_t));
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232 if (var == NULL) {
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233 return NGX_CONF_ERROR;
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234 }
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235
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236 var->text.len = value[1].len;
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237 if (!(var->text.data = ngx_pstrdup(geo->pool, &value[1]))) {
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238 return NGX_CONF_ERROR;
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239 }
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240
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241 var->value = (n == NGX_ERROR) ? 0 : n;
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242
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243 if (!(v = ngx_array_push(&geo->values))) {
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244 return NGX_CONF_ERROR;
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245 }
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246
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247 *v = var;
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248 }
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249
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250 rc = ngx_radix32tree_insert(geo->tree, cidrin.addr, cidrin.mask,
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251 (uintptr_t) var);
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252 if (rc == NGX_ERROR) {
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253 return NGX_CONF_ERROR;
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254 }
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255
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256 if (rc == NGX_BUSY) {
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257 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "duplicate parameter \"%V\"",
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258 &value[0]);
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259 return NGX_CONF_ERROR;
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260 }
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261
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262 return NGX_CONF_OK;
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263 }
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