Mercurial > hg > nginx
annotate src/http/modules/ngx_http_realip_module.c @ 6562:b13d3a6f0512
Added the $realip_remote_port variable.
author | Dmitry Volyntsev <xeioex@nginx.com> |
---|---|
date | Mon, 23 May 2016 18:44:22 +0300 |
parents | 2cd019520210 |
children | 26feae43987f |
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); |
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48 static ngx_http_realip_ctx_t *ngx_http_realip_get_module_ctx( |
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49 ngx_http_request_t *r); |
573 | 50 |
51 | |
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52 static ngx_int_t ngx_http_realip_remote_addr_variable(ngx_http_request_t *r, |
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53 ngx_http_variable_value_t *v, uintptr_t data); |
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54 static ngx_int_t ngx_http_realip_remote_port_variable(ngx_http_request_t *r, |
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55 ngx_http_variable_value_t *v, uintptr_t data); |
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56 |
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57 |
573 | 58 static ngx_command_t ngx_http_realip_commands[] = { |
59 | |
60 { ngx_string("set_real_ip_from"), | |
61 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
62 ngx_http_realip_from, | |
63 NGX_HTTP_LOC_CONF_OFFSET, | |
64 0, | |
65 NULL }, | |
66 | |
67 { ngx_string("real_ip_header"), | |
68 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
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69 ngx_http_realip, |
573 | 70 NGX_HTTP_LOC_CONF_OFFSET, |
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71 0, |
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72 NULL }, |
573 | 73 |
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74 { ngx_string("real_ip_recursive"), |
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75 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, |
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76 ngx_conf_set_flag_slot, |
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77 NGX_HTTP_LOC_CONF_OFFSET, |
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78 offsetof(ngx_http_realip_loc_conf_t, recursive), |
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79 NULL }, |
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80 |
573 | 81 ngx_null_command |
82 }; | |
83 | |
84 | |
85 | |
667 | 86 static ngx_http_module_t ngx_http_realip_module_ctx = { |
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87 ngx_http_realip_add_variables, /* preconfiguration */ |
681 | 88 ngx_http_realip_init, /* postconfiguration */ |
573 | 89 |
90 NULL, /* create main configuration */ | |
91 NULL, /* init main configuration */ | |
92 | |
93 NULL, /* create server configuration */ | |
94 NULL, /* merge server configuration */ | |
95 | |
96 ngx_http_realip_create_loc_conf, /* create location configuration */ | |
97 ngx_http_realip_merge_loc_conf /* merge location configuration */ | |
98 }; | |
99 | |
100 | |
101 ngx_module_t ngx_http_realip_module = { | |
102 NGX_MODULE_V1, | |
103 &ngx_http_realip_module_ctx, /* module context */ | |
104 ngx_http_realip_commands, /* module directives */ | |
105 NGX_HTTP_MODULE, /* module type */ | |
106 NULL, /* init master */ | |
681 | 107 NULL, /* init module */ |
573 | 108 NULL, /* init process */ |
109 NULL, /* init thread */ | |
110 NULL, /* exit thread */ | |
111 NULL, /* exit process */ | |
112 NULL, /* exit master */ | |
113 NGX_MODULE_V1_PADDING | |
114 }; | |
115 | |
116 | |
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117 static ngx_http_variable_t ngx_http_realip_vars[] = { |
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118 |
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119 { ngx_string("realip_remote_addr"), NULL, |
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120 ngx_http_realip_remote_addr_variable, 0, 0, 0 }, |
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121 |
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122 { ngx_string("realip_remote_port"), NULL, |
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123 ngx_http_realip_remote_port_variable, 0, 0, 0 }, |
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124 |
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125 { ngx_null_string, NULL, NULL, 0, 0, 0 } |
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126 }; |
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127 |
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128 |
573 | 129 static ngx_int_t |
130 ngx_http_realip_handler(ngx_http_request_t *r) | |
131 { | |
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132 u_char *p; |
573 | 133 size_t len; |
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134 ngx_str_t *value; |
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135 ngx_uint_t i, hash; |
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136 ngx_addr_t addr; |
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137 ngx_array_t *xfwd; |
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138 ngx_list_part_t *part; |
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139 ngx_table_elt_t *header; |
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140 ngx_connection_t *c; |
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141 ngx_http_realip_ctx_t *ctx; |
573 | 142 ngx_http_realip_loc_conf_t *rlcf; |
143 | |
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144 ctx = ngx_http_get_module_ctx(r, ngx_http_realip_module); |
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145 |
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146 if (ctx) { |
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147 return NGX_DECLINED; |
573 | 148 } |
149 | |
150 rlcf = ngx_http_get_module_loc_conf(r, ngx_http_realip_module); | |
151 | |
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152 if (rlcf->from == NULL) { |
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153 return NGX_DECLINED; |
573 | 154 } |
155 | |
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156 switch (rlcf->type) { |
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157 |
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158 case NGX_HTTP_REALIP_XREALIP: |
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159 |
573 | 160 if (r->headers_in.x_real_ip == NULL) { |
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161 return NGX_DECLINED; |
573 | 162 } |
163 | |
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164 value = &r->headers_in.x_real_ip->value; |
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165 xfwd = NULL; |
573 | 166 |
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167 break; |
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168 |
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169 case NGX_HTTP_REALIP_XFWD: |
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170 |
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171 xfwd = &r->headers_in.x_forwarded_for; |
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172 |
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173 if (xfwd->elts == NULL) { |
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174 return NGX_DECLINED; |
573 | 175 } |
176 | |
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177 value = NULL; |
573 | 178 |
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179 break; |
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180 |
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181 case NGX_HTTP_REALIP_PROXY: |
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182 |
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183 value = &r->connection->proxy_protocol_addr; |
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184 |
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185 if (value->len == 0) { |
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186 return NGX_DECLINED; |
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187 } |
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188 |
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189 xfwd = NULL; |
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190 |
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191 break; |
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192 |
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193 default: /* NGX_HTTP_REALIP_HEADER */ |
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194 |
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195 part = &r->headers_in.headers.part; |
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196 header = part->elts; |
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197 |
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198 hash = rlcf->hash; |
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199 len = rlcf->header.len; |
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200 p = rlcf->header.data; |
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201 |
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202 for (i = 0; /* void */ ; i++) { |
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203 |
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204 if (i >= part->nelts) { |
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205 if (part->next == NULL) { |
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206 break; |
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207 } |
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208 |
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209 part = part->next; |
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210 header = part->elts; |
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211 i = 0; |
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212 } |
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213 |
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214 if (hash == header[i].hash |
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215 && len == header[i].key.len |
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216 && ngx_strncmp(p, header[i].lowcase_key, len) == 0) |
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217 { |
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218 value = &header[i].value; |
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219 xfwd = NULL; |
2257
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220 |
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221 goto found; |
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222 } |
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223 } |
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224 |
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225 return NGX_DECLINED; |
573 | 226 } |
227 | |
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228 found: |
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229 |
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230 c = r->connection; |
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231 |
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232 addr.sockaddr = c->sockaddr; |
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233 addr.socklen = c->socklen; |
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234 /* addr.name = c->addr_text; */ |
3274 | 235 |
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236 if (ngx_http_get_forwarded_addr(r, &addr, xfwd, value, rlcf->from, |
4624
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237 rlcf->recursive) |
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238 != NGX_DECLINED) |
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239 { |
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240 return ngx_http_realip_set_addr(r, &addr); |
3274 | 241 } |
242 | |
243 return NGX_DECLINED; | |
244 } | |
245 | |
573 | 246 |
3274 | 247 static ngx_int_t |
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248 ngx_http_realip_set_addr(ngx_http_request_t *r, ngx_addr_t *addr) |
3274 | 249 { |
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250 size_t len; |
3274 | 251 u_char *p; |
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252 u_char text[NGX_SOCKADDR_STRLEN]; |
3274 | 253 ngx_connection_t *c; |
254 ngx_pool_cleanup_t *cln; | |
255 ngx_http_realip_ctx_t *ctx; | |
573 | 256 |
3274 | 257 cln = ngx_pool_cleanup_add(r->pool, sizeof(ngx_http_realip_ctx_t)); |
258 if (cln == NULL) { | |
259 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
260 } | |
2176
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261 |
3274 | 262 ctx = cln->data; |
263 ngx_http_set_ctx(r, ctx, ngx_http_realip_module); | |
1114
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264 |
3274 | 265 c = r->connection; |
266 | |
5263
05ba5bce31e0
Core: extended ngx_sock_ntop() with socklen parameter.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
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|
267 len = ngx_sock_ntop(addr->sockaddr, addr->socklen, text, |
05ba5bce31e0
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268 NGX_SOCKADDR_STRLEN, 0); |
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269 if (len == 0) { |
3274 | 270 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
271 } | |
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272 |
3274 | 273 p = ngx_pnalloc(c->pool, len); |
274 if (p == NULL) { | |
275 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
276 } | |
1118
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277 |
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278 ngx_memcpy(p, text, len); |
2176
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279 |
3274 | 280 cln->handler = ngx_http_realip_cleanup; |
2176
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281 |
3274 | 282 ctx->connection = c; |
283 ctx->sockaddr = c->sockaddr; | |
284 ctx->socklen = c->socklen; | |
285 ctx->addr_text = c->addr_text; | |
573 | 286 |
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287 c->sockaddr = addr->sockaddr; |
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288 c->socklen = addr->socklen; |
3274 | 289 c->addr_text.len = len; |
290 c->addr_text.data = p; | |
573 | 291 |
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ngx_http_realip_module must return NGX_DECLINED
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292 return NGX_DECLINED; |
573 | 293 } |
294 | |
295 | |
2176
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296 static void |
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297 ngx_http_realip_cleanup(void *data) |
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298 { |
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299 ngx_http_realip_ctx_t *ctx = data; |
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300 |
3273
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301 ngx_connection_t *c; |
2176
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302 |
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303 c = ctx->connection; |
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304 |
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305 c->sockaddr = ctx->sockaddr; |
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306 c->socklen = ctx->socklen; |
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307 c->addr_text = ctx->addr_text; |
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308 } |
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309 |
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310 |
573 | 311 static char * |
312 ngx_http_realip_from(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
313 { | |
314 ngx_http_realip_loc_conf_t *rlcf = conf; | |
315 | |
2257
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316 ngx_int_t rc; |
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317 ngx_str_t *value; |
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318 ngx_cidr_t *cidr; |
573 | 319 |
3274 | 320 value = cf->args->elts; |
321 | |
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322 if (rlcf->from == NULL) { |
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323 rlcf->from = ngx_array_create(cf->pool, 2, |
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324 sizeof(ngx_cidr_t)); |
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325 if (rlcf->from == NULL) { |
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326 return NGX_CONF_ERROR; |
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327 } |
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328 } |
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329 |
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330 cidr = ngx_array_push(rlcf->from); |
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331 if (cidr == NULL) { |
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332 return NGX_CONF_ERROR; |
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333 } |
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334 |
3274 | 335 #if (NGX_HAVE_UNIX_DOMAIN) |
336 | |
337 if (ngx_strcmp(value[1].data, "unix:") == 0) { | |
6474 | 338 cidr->family = AF_UNIX; |
339 return NGX_CONF_OK; | |
3274 | 340 } |
341 | |
342 #endif | |
343 | |
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344 rc = ngx_ptocidr(&value[1], cidr); |
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345 |
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346 if (rc == NGX_ERROR) { |
573 | 347 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid parameter \"%V\"", |
348 &value[1]); | |
349 return NGX_CONF_ERROR; | |
350 } | |
351 | |
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352 if (rc == NGX_DONE) { |
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353 ngx_conf_log_error(NGX_LOG_WARN, cf, 0, |
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354 "low address bits of %V are meaningless", &value[1]); |
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355 } |
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356 |
573 | 357 return NGX_CONF_OK; |
358 } | |
359 | |
360 | |
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361 static char * |
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362 ngx_http_realip(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
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363 { |
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364 ngx_http_realip_loc_conf_t *rlcf = conf; |
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365 |
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366 ngx_str_t *value; |
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367 |
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368 value = cf->args->elts; |
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369 |
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370 if (ngx_strcmp(value[1].data, "X-Real-IP") == 0) { |
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371 rlcf->type = NGX_HTTP_REALIP_XREALIP; |
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372 return NGX_CONF_OK; |
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373 } |
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374 |
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375 if (ngx_strcmp(value[1].data, "X-Forwarded-For") == 0) { |
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376 rlcf->type = NGX_HTTP_REALIP_XFWD; |
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377 return NGX_CONF_OK; |
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378 } |
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379 |
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380 if (ngx_strcmp(value[1].data, "proxy_protocol") == 0) { |
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381 rlcf->type = NGX_HTTP_REALIP_PROXY; |
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382 return NGX_CONF_OK; |
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383 } |
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384 |
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385 rlcf->type = NGX_HTTP_REALIP_HEADER; |
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386 rlcf->hash = ngx_hash_strlow(value[1].data, value[1].data, value[1].len); |
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387 rlcf->header = value[1]; |
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388 |
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389 return NGX_CONF_OK; |
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390 } |
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391 |
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392 |
573 | 393 static void * |
394 ngx_http_realip_create_loc_conf(ngx_conf_t *cf) | |
395 { | |
396 ngx_http_realip_loc_conf_t *conf; | |
397 | |
398 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_realip_loc_conf_t)); | |
399 if (conf == NULL) { | |
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400 return NULL; |
573 | 401 } |
402 | |
403 /* | |
404 * set by ngx_pcalloc(): | |
405 * | |
406 * conf->from = NULL; | |
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407 * conf->hash = 0; |
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408 * conf->header = { 0, NULL }; |
573 | 409 */ |
410 | |
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411 conf->type = NGX_CONF_UNSET_UINT; |
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412 conf->recursive = NGX_CONF_UNSET; |
573 | 413 |
414 return conf; | |
415 } | |
416 | |
417 | |
418 static char * | |
419 ngx_http_realip_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) | |
420 { | |
421 ngx_http_realip_loc_conf_t *prev = parent; | |
422 ngx_http_realip_loc_conf_t *conf = child; | |
423 | |
424 if (conf->from == NULL) { | |
425 conf->from = prev->from; | |
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426 } |
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427 |
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428 ngx_conf_merge_uint_value(conf->type, prev->type, NGX_HTTP_REALIP_XREALIP); |
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429 ngx_conf_merge_value(conf->recursive, prev->recursive, 0); |
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430 |
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431 if (conf->header.len == 0) { |
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432 conf->hash = prev->hash; |
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433 conf->header = prev->header; |
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434 } |
573 | 435 |
436 return NGX_CONF_OK; | |
437 } | |
438 | |
439 | |
440 static ngx_int_t | |
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441 ngx_http_realip_add_variables(ngx_conf_t *cf) |
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442 { |
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443 ngx_http_variable_t *var, *v; |
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444 |
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445 for (v = ngx_http_realip_vars; v->name.len; v++) { |
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446 var = ngx_http_add_variable(cf, &v->name, v->flags); |
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447 if (var == NULL) { |
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448 return NGX_ERROR; |
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449 } |
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450 |
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451 var->get_handler = v->get_handler; |
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452 var->data = v->data; |
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453 } |
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454 |
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455 return NGX_OK; |
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456 } |
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457 |
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458 |
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|
459 static ngx_int_t |
681 | 460 ngx_http_realip_init(ngx_conf_t *cf) |
573 | 461 { |
462 ngx_http_handler_pt *h; | |
463 ngx_http_core_main_conf_t *cmcf; | |
464 | |
681 | 465 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); |
573 | 466 |
467 h = ngx_array_push(&cmcf->phases[NGX_HTTP_POST_READ_PHASE].handlers); | |
468 if (h == NULL) { | |
469 return NGX_ERROR; | |
470 } | |
471 | |
472 *h = ngx_http_realip_handler; | |
473 | |
581 | 474 h = ngx_array_push(&cmcf->phases[NGX_HTTP_PREACCESS_PHASE].handlers); |
573 | 475 if (h == NULL) { |
476 return NGX_ERROR; | |
477 } | |
478 | |
479 *h = ngx_http_realip_handler; | |
480 | |
481 return NGX_OK; | |
482 } | |
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483 |
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484 |
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485 static ngx_http_realip_ctx_t * |
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486 ngx_http_realip_get_module_ctx(ngx_http_request_t *r) |
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487 { |
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488 ngx_pool_cleanup_t *cln; |
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489 ngx_http_realip_ctx_t *ctx; |
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490 |
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491 ctx = ngx_http_get_module_ctx(r, ngx_http_realip_module); |
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492 |
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493 if (ctx == NULL && (r->internal || r->filter_finalize)) { |
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494 |
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495 /* |
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496 * if module context was reset, the original address |
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497 * can still be found in the cleanup handler |
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|
498 */ |
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499 |
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500 for (cln = r->pool->cleanup; cln; cln = cln->next) { |
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501 if (cln->handler == ngx_http_realip_cleanup) { |
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|
502 ctx = cln->data; |
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|
503 break; |
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|
504 } |
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|
505 } |
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|
506 } |
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|
507 |
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|
508 return ctx; |
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|
509 } |
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Added the $realip_remote_port variable.
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|
510 |
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Added the $realip_remote_port variable.
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|
511 |
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|
512 static ngx_int_t |
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|
513 ngx_http_realip_remote_addr_variable(ngx_http_request_t *r, |
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Added the $realip_remote_port variable.
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514 ngx_http_variable_value_t *v, uintptr_t data) |
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515 { |
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|
516 ngx_str_t *addr_text; |
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517 ngx_http_realip_ctx_t *ctx; |
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518 |
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|
519 ctx = ngx_http_realip_get_module_ctx(r); |
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|
520 |
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521 addr_text = ctx ? &ctx->addr_text : &r->connection->addr_text; |
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522 |
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|
523 v->len = addr_text->len; |
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524 v->valid = 1; |
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525 v->no_cacheable = 0; |
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526 v->not_found = 0; |
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527 v->data = addr_text->data; |
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Realip: the $realip_remote_addr variable.
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528 |
cebe43bace93
Realip: the $realip_remote_addr variable.
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529 return NGX_OK; |
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Realip: the $realip_remote_addr variable.
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530 } |
6562
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531 |
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532 |
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533 static ngx_int_t |
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534 ngx_http_realip_remote_port_variable(ngx_http_request_t *r, |
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535 ngx_http_variable_value_t *v, uintptr_t data) |
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536 { |
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537 ngx_uint_t port; |
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538 struct sockaddr *sa; |
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539 ngx_http_realip_ctx_t *ctx; |
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540 |
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541 ctx = ngx_http_realip_get_module_ctx(r); |
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542 |
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543 sa = ctx ? ctx->sockaddr : r->connection->sockaddr; |
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544 |
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545 v->len = 0; |
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546 v->valid = 1; |
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547 v->no_cacheable = 0; |
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548 v->not_found = 0; |
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549 |
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550 v->data = ngx_pnalloc(r->pool, sizeof("65535") - 1); |
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551 if (v->data == NULL) { |
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552 return NGX_ERROR; |
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553 } |
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554 |
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555 switch (sa->sa_family) { |
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556 |
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557 #if (NGX_HAVE_INET6) |
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558 case AF_INET6: |
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559 port = ntohs(((struct sockaddr_in6 *) sa)->sin6_port); |
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560 break; |
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561 #endif |
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562 |
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563 #if (NGX_HAVE_UNIX_DOMAIN) |
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564 case AF_UNIX: |
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565 port = 0; |
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566 break; |
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567 #endif |
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568 |
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|
569 default: /* AF_INET */ |
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570 port = ntohs(((struct sockaddr_in *) sa)->sin_port); |
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571 break; |
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572 } |
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573 |
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574 if (port > 0 && port < 65536) { |
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575 v->len = ngx_sprintf(v->data, "%ui", port) - v->data; |
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576 } |
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577 |
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578 return NGX_OK; |
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579 } |