Mercurial > hg > nginx
annotate src/http/modules/ngx_http_realip_module.c @ 6294:cebe43bace93
Realip: the $realip_remote_addr variable.
author | Ruslan Ermilov <ru@nginx.com> |
---|---|
date | Mon, 16 Nov 2015 16:02:02 +0300 |
parents | 3a72b1805c52 |
children | 2cd019520210 |
rev | line source |
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573 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4412 | 4 * Copyright (C) Nginx, Inc. |
573 | 5 */ |
6 | |
7 | |
8 #include <ngx_config.h> | |
9 #include <ngx_core.h> | |
10 #include <ngx_http.h> | |
11 | |
12 | |
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13 #define NGX_HTTP_REALIP_XREALIP 0 |
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14 #define NGX_HTTP_REALIP_XFWD 1 |
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15 #define NGX_HTTP_REALIP_HEADER 2 |
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16 #define NGX_HTTP_REALIP_PROXY 3 |
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17 |
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18 |
573 | 19 typedef struct { |
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20 ngx_array_t *from; /* array of ngx_cidr_t */ |
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21 ngx_uint_t type; |
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22 ngx_uint_t hash; |
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23 ngx_str_t header; |
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24 ngx_flag_t recursive; |
573 | 25 } ngx_http_realip_loc_conf_t; |
26 | |
27 | |
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28 typedef struct { |
3274 | 29 ngx_connection_t *connection; |
30 struct sockaddr *sockaddr; | |
31 socklen_t socklen; | |
32 ngx_str_t addr_text; | |
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33 } ngx_http_realip_ctx_t; |
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34 |
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35 |
573 | 36 static ngx_int_t ngx_http_realip_handler(ngx_http_request_t *r); |
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37 static ngx_int_t ngx_http_realip_set_addr(ngx_http_request_t *r, |
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38 ngx_addr_t *addr); |
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39 static void ngx_http_realip_cleanup(void *data); |
573 | 40 static char *ngx_http_realip_from(ngx_conf_t *cf, ngx_command_t *cmd, |
41 void *conf); | |
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42 static char *ngx_http_realip(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); |
573 | 43 static void *ngx_http_realip_create_loc_conf(ngx_conf_t *cf); |
44 static char *ngx_http_realip_merge_loc_conf(ngx_conf_t *cf, | |
45 void *parent, void *child); | |
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46 static ngx_int_t ngx_http_realip_add_variables(ngx_conf_t *cf); |
681 | 47 static ngx_int_t ngx_http_realip_init(ngx_conf_t *cf); |
573 | 48 |
49 | |
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50 static ngx_int_t ngx_http_realip_remote_addr_variable(ngx_http_request_t *r, |
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51 ngx_http_variable_value_t *v, uintptr_t data); |
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52 |
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53 |
573 | 54 static ngx_command_t ngx_http_realip_commands[] = { |
55 | |
56 { ngx_string("set_real_ip_from"), | |
57 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
58 ngx_http_realip_from, | |
59 NGX_HTTP_LOC_CONF_OFFSET, | |
60 0, | |
61 NULL }, | |
62 | |
63 { ngx_string("real_ip_header"), | |
64 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
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65 ngx_http_realip, |
573 | 66 NGX_HTTP_LOC_CONF_OFFSET, |
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67 0, |
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68 NULL }, |
573 | 69 |
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70 { ngx_string("real_ip_recursive"), |
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71 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, |
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72 ngx_conf_set_flag_slot, |
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73 NGX_HTTP_LOC_CONF_OFFSET, |
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74 offsetof(ngx_http_realip_loc_conf_t, recursive), |
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75 NULL }, |
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76 |
573 | 77 ngx_null_command |
78 }; | |
79 | |
80 | |
81 | |
667 | 82 static ngx_http_module_t ngx_http_realip_module_ctx = { |
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83 ngx_http_realip_add_variables, /* preconfiguration */ |
681 | 84 ngx_http_realip_init, /* postconfiguration */ |
573 | 85 |
86 NULL, /* create main configuration */ | |
87 NULL, /* init main configuration */ | |
88 | |
89 NULL, /* create server configuration */ | |
90 NULL, /* merge server configuration */ | |
91 | |
92 ngx_http_realip_create_loc_conf, /* create location configuration */ | |
93 ngx_http_realip_merge_loc_conf /* merge location configuration */ | |
94 }; | |
95 | |
96 | |
97 ngx_module_t ngx_http_realip_module = { | |
98 NGX_MODULE_V1, | |
99 &ngx_http_realip_module_ctx, /* module context */ | |
100 ngx_http_realip_commands, /* module directives */ | |
101 NGX_HTTP_MODULE, /* module type */ | |
102 NULL, /* init master */ | |
681 | 103 NULL, /* init module */ |
573 | 104 NULL, /* init process */ |
105 NULL, /* init thread */ | |
106 NULL, /* exit thread */ | |
107 NULL, /* exit process */ | |
108 NULL, /* exit master */ | |
109 NGX_MODULE_V1_PADDING | |
110 }; | |
111 | |
112 | |
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113 static ngx_http_variable_t ngx_http_realip_vars[] = { |
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114 |
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115 { ngx_string("realip_remote_addr"), NULL, |
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116 ngx_http_realip_remote_addr_variable, 0, 0, 0 }, |
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117 |
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118 { ngx_null_string, NULL, NULL, 0, 0, 0 } |
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119 }; |
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120 |
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121 |
573 | 122 static ngx_int_t |
123 ngx_http_realip_handler(ngx_http_request_t *r) | |
124 { | |
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125 u_char *p; |
573 | 126 size_t len; |
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127 ngx_str_t *value; |
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128 ngx_uint_t i, hash; |
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129 ngx_addr_t addr; |
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130 ngx_array_t *xfwd; |
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131 ngx_list_part_t *part; |
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132 ngx_table_elt_t *header; |
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133 ngx_connection_t *c; |
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134 ngx_http_realip_ctx_t *ctx; |
573 | 135 ngx_http_realip_loc_conf_t *rlcf; |
136 | |
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137 ctx = ngx_http_get_module_ctx(r, ngx_http_realip_module); |
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138 |
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139 if (ctx) { |
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140 return NGX_DECLINED; |
573 | 141 } |
142 | |
143 rlcf = ngx_http_get_module_loc_conf(r, ngx_http_realip_module); | |
144 | |
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145 if (rlcf->from == NULL) { |
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146 return NGX_DECLINED; |
573 | 147 } |
148 | |
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149 switch (rlcf->type) { |
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150 |
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151 case NGX_HTTP_REALIP_XREALIP: |
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152 |
573 | 153 if (r->headers_in.x_real_ip == NULL) { |
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154 return NGX_DECLINED; |
573 | 155 } |
156 | |
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157 value = &r->headers_in.x_real_ip->value; |
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158 xfwd = NULL; |
573 | 159 |
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160 break; |
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161 |
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162 case NGX_HTTP_REALIP_XFWD: |
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163 |
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164 xfwd = &r->headers_in.x_forwarded_for; |
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165 |
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166 if (xfwd->elts == NULL) { |
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167 return NGX_DECLINED; |
573 | 168 } |
169 | |
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170 value = NULL; |
573 | 171 |
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172 break; |
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173 |
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174 case NGX_HTTP_REALIP_PROXY: |
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175 |
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176 value = &r->connection->proxy_protocol_addr; |
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177 |
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178 if (value->len == 0) { |
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179 return NGX_DECLINED; |
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180 } |
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181 |
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182 xfwd = NULL; |
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183 |
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184 break; |
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185 |
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186 default: /* NGX_HTTP_REALIP_HEADER */ |
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187 |
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188 part = &r->headers_in.headers.part; |
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189 header = part->elts; |
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190 |
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191 hash = rlcf->hash; |
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192 len = rlcf->header.len; |
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193 p = rlcf->header.data; |
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194 |
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195 for (i = 0; /* void */ ; i++) { |
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196 |
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197 if (i >= part->nelts) { |
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198 if (part->next == NULL) { |
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199 break; |
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200 } |
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201 |
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202 part = part->next; |
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203 header = part->elts; |
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204 i = 0; |
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205 } |
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206 |
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207 if (hash == header[i].hash |
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208 && len == header[i].key.len |
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209 && ngx_strncmp(p, header[i].lowcase_key, len) == 0) |
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210 { |
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211 value = &header[i].value; |
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212 xfwd = NULL; |
2257
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213 |
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214 goto found; |
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215 } |
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216 } |
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217 |
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218 return NGX_DECLINED; |
573 | 219 } |
220 | |
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221 found: |
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222 |
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223 c = r->connection; |
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224 |
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225 addr.sockaddr = c->sockaddr; |
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226 addr.socklen = c->socklen; |
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227 /* addr.name = c->addr_text; */ |
3274 | 228 |
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229 if (ngx_http_get_forwarded_addr(r, &addr, xfwd, value, rlcf->from, |
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230 rlcf->recursive) |
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231 != NGX_DECLINED) |
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232 { |
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233 return ngx_http_realip_set_addr(r, &addr); |
3274 | 234 } |
235 | |
236 return NGX_DECLINED; | |
237 } | |
238 | |
573 | 239 |
3274 | 240 static ngx_int_t |
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241 ngx_http_realip_set_addr(ngx_http_request_t *r, ngx_addr_t *addr) |
3274 | 242 { |
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243 size_t len; |
3274 | 244 u_char *p; |
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245 u_char text[NGX_SOCKADDR_STRLEN]; |
3274 | 246 ngx_connection_t *c; |
247 ngx_pool_cleanup_t *cln; | |
248 ngx_http_realip_ctx_t *ctx; | |
573 | 249 |
3274 | 250 cln = ngx_pool_cleanup_add(r->pool, sizeof(ngx_http_realip_ctx_t)); |
251 if (cln == NULL) { | |
252 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
253 } | |
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254 |
3274 | 255 ctx = cln->data; |
256 ngx_http_set_ctx(r, ctx, ngx_http_realip_module); | |
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257 |
3274 | 258 c = r->connection; |
259 | |
5263
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Vladimir Homutov <vl@nginx.com>
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260 len = ngx_sock_ntop(addr->sockaddr, addr->socklen, text, |
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|
261 NGX_SOCKADDR_STRLEN, 0); |
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262 if (len == 0) { |
3274 | 263 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
264 } | |
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265 |
3274 | 266 p = ngx_pnalloc(c->pool, len); |
267 if (p == NULL) { | |
268 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
269 } | |
1118
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270 |
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271 ngx_memcpy(p, text, len); |
2176
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272 |
3274 | 273 cln->handler = ngx_http_realip_cleanup; |
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274 |
3274 | 275 ctx->connection = c; |
276 ctx->sockaddr = c->sockaddr; | |
277 ctx->socklen = c->socklen; | |
278 ctx->addr_text = c->addr_text; | |
573 | 279 |
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280 c->sockaddr = addr->sockaddr; |
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281 c->socklen = addr->socklen; |
3274 | 282 c->addr_text.len = len; |
283 c->addr_text.data = p; | |
573 | 284 |
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285 return NGX_DECLINED; |
573 | 286 } |
287 | |
288 | |
2176
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289 static void |
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290 ngx_http_realip_cleanup(void *data) |
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291 { |
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292 ngx_http_realip_ctx_t *ctx = data; |
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293 |
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294 ngx_connection_t *c; |
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295 |
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296 c = ctx->connection; |
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297 |
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298 c->sockaddr = ctx->sockaddr; |
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299 c->socklen = ctx->socklen; |
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300 c->addr_text = ctx->addr_text; |
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301 } |
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302 |
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303 |
573 | 304 static char * |
305 ngx_http_realip_from(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
306 { | |
307 ngx_http_realip_loc_conf_t *rlcf = conf; | |
308 | |
2257
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309 ngx_int_t rc; |
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310 ngx_str_t *value; |
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311 ngx_cidr_t *cidr; |
573 | 312 |
3274 | 313 value = cf->args->elts; |
314 | |
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315 if (rlcf->from == NULL) { |
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316 rlcf->from = ngx_array_create(cf->pool, 2, |
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317 sizeof(ngx_cidr_t)); |
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318 if (rlcf->from == NULL) { |
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319 return NGX_CONF_ERROR; |
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320 } |
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321 } |
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322 |
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323 cidr = ngx_array_push(rlcf->from); |
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324 if (cidr == NULL) { |
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325 return NGX_CONF_ERROR; |
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326 } |
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327 |
3274 | 328 #if (NGX_HAVE_UNIX_DOMAIN) |
329 | |
330 if (ngx_strcmp(value[1].data, "unix:") == 0) { | |
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331 cidr->family = AF_UNIX; |
3274 | 332 return NGX_CONF_OK; |
333 } | |
334 | |
335 #endif | |
336 | |
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337 rc = ngx_ptocidr(&value[1], cidr); |
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338 |
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339 if (rc == NGX_ERROR) { |
573 | 340 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid parameter \"%V\"", |
341 &value[1]); | |
342 return NGX_CONF_ERROR; | |
343 } | |
344 | |
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345 if (rc == NGX_DONE) { |
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346 ngx_conf_log_error(NGX_LOG_WARN, cf, 0, |
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347 "low address bits of %V are meaningless", &value[1]); |
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348 } |
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349 |
573 | 350 return NGX_CONF_OK; |
351 } | |
352 | |
353 | |
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354 static char * |
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355 ngx_http_realip(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
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356 { |
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357 ngx_http_realip_loc_conf_t *rlcf = conf; |
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358 |
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359 ngx_str_t *value; |
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360 |
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361 value = cf->args->elts; |
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362 |
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363 if (ngx_strcmp(value[1].data, "X-Real-IP") == 0) { |
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364 rlcf->type = NGX_HTTP_REALIP_XREALIP; |
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365 return NGX_CONF_OK; |
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366 } |
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367 |
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368 if (ngx_strcmp(value[1].data, "X-Forwarded-For") == 0) { |
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369 rlcf->type = NGX_HTTP_REALIP_XFWD; |
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370 return NGX_CONF_OK; |
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371 } |
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372 |
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Added server-side support for PROXY protocol v1 (ticket #355).
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373 if (ngx_strcmp(value[1].data, "proxy_protocol") == 0) { |
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Added server-side support for PROXY protocol v1 (ticket #355).
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374 rlcf->type = NGX_HTTP_REALIP_PROXY; |
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Added server-side support for PROXY protocol v1 (ticket #355).
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375 return NGX_CONF_OK; |
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Added server-side support for PROXY protocol v1 (ticket #355).
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|
376 } |
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Added server-side support for PROXY protocol v1 (ticket #355).
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377 |
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378 rlcf->type = NGX_HTTP_REALIP_HEADER; |
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379 rlcf->hash = ngx_hash_strlow(value[1].data, value[1].data, value[1].len); |
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380 rlcf->header = value[1]; |
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381 |
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382 return NGX_CONF_OK; |
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383 } |
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384 |
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385 |
573 | 386 static void * |
387 ngx_http_realip_create_loc_conf(ngx_conf_t *cf) | |
388 { | |
389 ngx_http_realip_loc_conf_t *conf; | |
390 | |
391 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_realip_loc_conf_t)); | |
392 if (conf == NULL) { | |
2912
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393 return NULL; |
573 | 394 } |
395 | |
396 /* | |
397 * set by ngx_pcalloc(): | |
398 * | |
399 * conf->from = NULL; | |
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400 * conf->hash = 0; |
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401 * conf->header = { 0, NULL }; |
573 | 402 */ |
403 | |
2257
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404 conf->type = NGX_CONF_UNSET_UINT; |
4624
df93068953c0
realip: chains of trusted proxies and IPv6 support.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
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405 conf->recursive = NGX_CONF_UNSET; |
573 | 406 |
407 return conf; | |
408 } | |
409 | |
410 | |
411 static char * | |
412 ngx_http_realip_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) | |
413 { | |
414 ngx_http_realip_loc_conf_t *prev = parent; | |
415 ngx_http_realip_loc_conf_t *conf = child; | |
416 | |
417 if (conf->from == NULL) { | |
418 conf->from = prev->from; | |
3305
8017f9bda3f6
fix "set_real_ip_from unix:" inheritance
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419 } |
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fix "set_real_ip_from unix:" inheritance
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420 |
2257
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421 ngx_conf_merge_uint_value(conf->type, prev->type, NGX_HTTP_REALIP_XREALIP); |
4624
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422 ngx_conf_merge_value(conf->recursive, prev->recursive, 0); |
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423 |
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424 if (conf->header.len == 0) { |
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425 conf->hash = prev->hash; |
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426 conf->header = prev->header; |
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427 } |
573 | 428 |
429 return NGX_CONF_OK; | |
430 } | |
431 | |
432 | |
433 static ngx_int_t | |
6294
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434 ngx_http_realip_add_variables(ngx_conf_t *cf) |
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|
435 { |
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436 ngx_http_variable_t *var, *v; |
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437 |
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|
438 for (v = ngx_http_realip_vars; v->name.len; v++) { |
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|
439 var = ngx_http_add_variable(cf, &v->name, v->flags); |
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Realip: the $realip_remote_addr variable.
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|
440 if (var == NULL) { |
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441 return NGX_ERROR; |
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|
442 } |
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Realip: the $realip_remote_addr variable.
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|
443 |
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Realip: the $realip_remote_addr variable.
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|
444 var->get_handler = v->get_handler; |
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Realip: the $realip_remote_addr variable.
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|
445 var->data = v->data; |
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Realip: the $realip_remote_addr variable.
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|
446 } |
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Realip: the $realip_remote_addr variable.
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|
447 |
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Realip: the $realip_remote_addr variable.
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diff
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|
448 return NGX_OK; |
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Realip: the $realip_remote_addr variable.
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diff
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|
449 } |
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Realip: the $realip_remote_addr variable.
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|
450 |
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Realip: the $realip_remote_addr variable.
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changeset
|
451 |
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Realip: the $realip_remote_addr variable.
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diff
changeset
|
452 static ngx_int_t |
681 | 453 ngx_http_realip_init(ngx_conf_t *cf) |
573 | 454 { |
455 ngx_http_handler_pt *h; | |
456 ngx_http_core_main_conf_t *cmcf; | |
457 | |
681 | 458 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); |
573 | 459 |
460 h = ngx_array_push(&cmcf->phases[NGX_HTTP_POST_READ_PHASE].handlers); | |
461 if (h == NULL) { | |
462 return NGX_ERROR; | |
463 } | |
464 | |
465 *h = ngx_http_realip_handler; | |
466 | |
581 | 467 h = ngx_array_push(&cmcf->phases[NGX_HTTP_PREACCESS_PHASE].handlers); |
573 | 468 if (h == NULL) { |
469 return NGX_ERROR; | |
470 } | |
471 | |
472 *h = ngx_http_realip_handler; | |
473 | |
474 return NGX_OK; | |
475 } | |
6294
cebe43bace93
Realip: the $realip_remote_addr variable.
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diff
changeset
|
476 |
cebe43bace93
Realip: the $realip_remote_addr variable.
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5605
diff
changeset
|
477 |
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Realip: the $realip_remote_addr variable.
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diff
changeset
|
478 static ngx_int_t |
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Realip: the $realip_remote_addr variable.
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|
479 ngx_http_realip_remote_addr_variable(ngx_http_request_t *r, |
cebe43bace93
Realip: the $realip_remote_addr variable.
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diff
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|
480 ngx_http_variable_value_t *v, uintptr_t data) |
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Realip: the $realip_remote_addr variable.
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diff
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|
481 { |
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Realip: the $realip_remote_addr variable.
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diff
changeset
|
482 ngx_str_t *addr_text; |
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Realip: the $realip_remote_addr variable.
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diff
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|
483 ngx_pool_cleanup_t *cln; |
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Realip: the $realip_remote_addr variable.
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diff
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|
484 ngx_http_realip_ctx_t *ctx; |
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Realip: the $realip_remote_addr variable.
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diff
changeset
|
485 |
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Realip: the $realip_remote_addr variable.
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parents:
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diff
changeset
|
486 ctx = ngx_http_get_module_ctx(r, ngx_http_realip_module); |
cebe43bace93
Realip: the $realip_remote_addr variable.
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diff
changeset
|
487 |
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Realip: the $realip_remote_addr variable.
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parents:
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diff
changeset
|
488 if (ctx == NULL && (r->internal || r->filter_finalize)) { |
cebe43bace93
Realip: the $realip_remote_addr variable.
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diff
changeset
|
489 |
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Realip: the $realip_remote_addr variable.
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parents:
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diff
changeset
|
490 /* |
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Realip: the $realip_remote_addr variable.
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parents:
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diff
changeset
|
491 * if module context was reset, the original address |
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Realip: the $realip_remote_addr variable.
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diff
changeset
|
492 * can still be found in the cleanup handler |
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Realip: the $realip_remote_addr variable.
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diff
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|
493 */ |
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Realip: the $realip_remote_addr variable.
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diff
changeset
|
494 |
cebe43bace93
Realip: the $realip_remote_addr variable.
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parents:
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diff
changeset
|
495 for (cln = r->pool->cleanup; cln; cln = cln->next) { |
cebe43bace93
Realip: the $realip_remote_addr variable.
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parents:
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diff
changeset
|
496 if (cln->handler == ngx_http_realip_cleanup) { |
cebe43bace93
Realip: the $realip_remote_addr variable.
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diff
changeset
|
497 ctx = cln->data; |
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Realip: the $realip_remote_addr variable.
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diff
changeset
|
498 break; |
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Realip: the $realip_remote_addr variable.
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parents:
5605
diff
changeset
|
499 } |
cebe43bace93
Realip: the $realip_remote_addr variable.
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parents:
5605
diff
changeset
|
500 } |
cebe43bace93
Realip: the $realip_remote_addr variable.
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parents:
5605
diff
changeset
|
501 } |
cebe43bace93
Realip: the $realip_remote_addr variable.
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parents:
5605
diff
changeset
|
502 |
cebe43bace93
Realip: the $realip_remote_addr variable.
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diff
changeset
|
503 addr_text = ctx ? &ctx->addr_text : &r->connection->addr_text; |
cebe43bace93
Realip: the $realip_remote_addr variable.
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parents:
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diff
changeset
|
504 |
cebe43bace93
Realip: the $realip_remote_addr variable.
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parents:
5605
diff
changeset
|
505 v->len = addr_text->len; |
cebe43bace93
Realip: the $realip_remote_addr variable.
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parents:
5605
diff
changeset
|
506 v->valid = 1; |
cebe43bace93
Realip: the $realip_remote_addr variable.
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parents:
5605
diff
changeset
|
507 v->no_cacheable = 0; |
cebe43bace93
Realip: the $realip_remote_addr variable.
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parents:
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diff
changeset
|
508 v->not_found = 0; |
cebe43bace93
Realip: the $realip_remote_addr variable.
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parents:
5605
diff
changeset
|
509 v->data = addr_text->data; |
cebe43bace93
Realip: the $realip_remote_addr variable.
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parents:
5605
diff
changeset
|
510 |
cebe43bace93
Realip: the $realip_remote_addr variable.
Ruslan Ermilov <ru@nginx.com>
parents:
5605
diff
changeset
|
511 return NGX_OK; |
cebe43bace93
Realip: the $realip_remote_addr variable.
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parents:
5605
diff
changeset
|
512 } |