Mercurial > hg > nginx
annotate src/http/modules/ngx_http_realip_module.c @ 6563:26feae43987f
Realip: take client port from PROXY protocol header.
Previously, when the client address was changed to the one from
the PROXY protocol header, the client port ($remote_port) was
reset to zero. Now the client port is also changed to the one
from the PROXY protocol header.
author | Dmitry Volyntsev <xeioex@nginx.com> |
---|---|
date | Mon, 23 May 2016 18:44:22 +0300 |
parents | b13d3a6f0512 |
children | 3af0e65a461a |
rev | line source |
---|---|
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 struct sockaddr_in *sin; |
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142 #if (NGX_HAVE_INET6) |
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143 struct sockaddr_in6 *sin6; |
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144 #endif |
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145 ngx_http_realip_ctx_t *ctx; |
573 | 146 ngx_http_realip_loc_conf_t *rlcf; |
147 | |
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148 ctx = ngx_http_get_module_ctx(r, ngx_http_realip_module); |
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149 |
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150 if (ctx) { |
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151 return NGX_DECLINED; |
573 | 152 } |
153 | |
154 rlcf = ngx_http_get_module_loc_conf(r, ngx_http_realip_module); | |
155 | |
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156 if (rlcf->from == NULL) { |
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157 return NGX_DECLINED; |
573 | 158 } |
159 | |
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160 switch (rlcf->type) { |
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161 |
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162 case NGX_HTTP_REALIP_XREALIP: |
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163 |
573 | 164 if (r->headers_in.x_real_ip == NULL) { |
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165 return NGX_DECLINED; |
573 | 166 } |
167 | |
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168 value = &r->headers_in.x_real_ip->value; |
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169 xfwd = NULL; |
573 | 170 |
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171 break; |
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172 |
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173 case NGX_HTTP_REALIP_XFWD: |
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174 |
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175 xfwd = &r->headers_in.x_forwarded_for; |
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176 |
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177 if (xfwd->elts == NULL) { |
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178 return NGX_DECLINED; |
573 | 179 } |
180 | |
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181 value = NULL; |
573 | 182 |
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183 break; |
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184 |
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185 case NGX_HTTP_REALIP_PROXY: |
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186 |
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187 value = &r->connection->proxy_protocol_addr; |
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188 |
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189 if (value->len == 0) { |
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190 return NGX_DECLINED; |
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191 } |
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192 |
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193 xfwd = NULL; |
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194 |
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195 break; |
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196 |
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197 default: /* NGX_HTTP_REALIP_HEADER */ |
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198 |
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199 part = &r->headers_in.headers.part; |
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200 header = part->elts; |
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201 |
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202 hash = rlcf->hash; |
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203 len = rlcf->header.len; |
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204 p = rlcf->header.data; |
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205 |
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206 for (i = 0; /* void */ ; i++) { |
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207 |
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208 if (i >= part->nelts) { |
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209 if (part->next == NULL) { |
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210 break; |
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211 } |
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212 |
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213 part = part->next; |
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214 header = part->elts; |
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215 i = 0; |
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216 } |
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217 |
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218 if (hash == header[i].hash |
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219 && len == header[i].key.len |
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220 && ngx_strncmp(p, header[i].lowcase_key, len) == 0) |
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221 { |
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222 value = &header[i].value; |
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223 xfwd = NULL; |
2257
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224 |
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225 goto found; |
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226 } |
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227 } |
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228 |
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229 return NGX_DECLINED; |
573 | 230 } |
231 | |
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232 found: |
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233 |
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234 c = r->connection; |
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235 |
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236 addr.sockaddr = c->sockaddr; |
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237 addr.socklen = c->socklen; |
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238 /* addr.name = c->addr_text; */ |
3274 | 239 |
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240 if (ngx_http_get_forwarded_addr(r, &addr, xfwd, value, rlcf->from, |
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241 rlcf->recursive) |
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242 != NGX_DECLINED) |
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243 { |
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244 if (rlcf->type == NGX_HTTP_REALIP_PROXY) { |
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245 |
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246 switch (addr.sockaddr->sa_family) { |
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247 |
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248 #if (NGX_HAVE_INET6) |
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249 case AF_INET6: |
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250 sin6 = (struct sockaddr_in6 *) addr.sockaddr; |
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251 sin6->sin6_port = htons(c->proxy_protocol_port); |
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252 break; |
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253 #endif |
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254 |
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|
255 default: /* AF_INET */ |
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|
256 sin = (struct sockaddr_in *) addr.sockaddr; |
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257 sin->sin_port = htons(c->proxy_protocol_port); |
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258 break; |
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|
259 } |
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|
260 } |
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261 |
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262 return ngx_http_realip_set_addr(r, &addr); |
3274 | 263 } |
264 | |
265 return NGX_DECLINED; | |
266 } | |
267 | |
573 | 268 |
3274 | 269 static ngx_int_t |
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270 ngx_http_realip_set_addr(ngx_http_request_t *r, ngx_addr_t *addr) |
3274 | 271 { |
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272 size_t len; |
3274 | 273 u_char *p; |
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|
274 u_char text[NGX_SOCKADDR_STRLEN]; |
3274 | 275 ngx_connection_t *c; |
276 ngx_pool_cleanup_t *cln; | |
277 ngx_http_realip_ctx_t *ctx; | |
573 | 278 |
3274 | 279 cln = ngx_pool_cleanup_add(r->pool, sizeof(ngx_http_realip_ctx_t)); |
280 if (cln == NULL) { | |
281 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
282 } | |
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283 |
3274 | 284 ctx = cln->data; |
285 ngx_http_set_ctx(r, ctx, ngx_http_realip_module); | |
1114
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fix broken values, debug logging, and style fix
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diff
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|
286 |
3274 | 287 c = r->connection; |
288 | |
5263
05ba5bce31e0
Core: extended ngx_sock_ntop() with socklen parameter.
Vladimir Homutov <vl@nginx.com>
parents:
5084
diff
changeset
|
289 len = ngx_sock_ntop(addr->sockaddr, addr->socklen, text, |
05ba5bce31e0
Core: extended ngx_sock_ntop() with socklen parameter.
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changeset
|
290 NGX_SOCKADDR_STRLEN, 0); |
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291 if (len == 0) { |
3274 | 292 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
293 } | |
1114
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294 |
3274 | 295 p = ngx_pnalloc(c->pool, len); |
296 if (p == NULL) { | |
297 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
298 } | |
1118
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a client address must be allocated from a connection pool
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|
299 |
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300 ngx_memcpy(p, text, len); |
2176
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301 |
3274 | 302 cln->handler = ngx_http_realip_cleanup; |
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303 |
3274 | 304 ctx->connection = c; |
305 ctx->sockaddr = c->sockaddr; | |
306 ctx->socklen = c->socklen; | |
307 ctx->addr_text = c->addr_text; | |
573 | 308 |
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309 c->sockaddr = addr->sockaddr; |
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310 c->socklen = addr->socklen; |
3274 | 311 c->addr_text.len = len; |
312 c->addr_text.data = p; | |
573 | 313 |
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ngx_http_realip_module must return NGX_DECLINED
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diff
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|
314 return NGX_DECLINED; |
573 | 315 } |
316 | |
317 | |
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318 static void |
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319 ngx_http_realip_cleanup(void *data) |
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320 { |
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321 ngx_http_realip_ctx_t *ctx = data; |
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322 |
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|
323 ngx_connection_t *c; |
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324 |
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325 c = ctx->connection; |
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326 |
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327 c->sockaddr = ctx->sockaddr; |
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328 c->socklen = ctx->socklen; |
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329 c->addr_text = ctx->addr_text; |
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330 } |
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331 |
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332 |
573 | 333 static char * |
334 ngx_http_realip_from(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
335 { | |
336 ngx_http_realip_loc_conf_t *rlcf = conf; | |
337 | |
2257
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338 ngx_int_t rc; |
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|
339 ngx_str_t *value; |
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340 ngx_cidr_t *cidr; |
573 | 341 |
3274 | 342 value = cf->args->elts; |
343 | |
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344 if (rlcf->from == NULL) { |
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345 rlcf->from = ngx_array_create(cf->pool, 2, |
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346 sizeof(ngx_cidr_t)); |
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347 if (rlcf->from == NULL) { |
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348 return NGX_CONF_ERROR; |
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349 } |
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350 } |
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351 |
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352 cidr = ngx_array_push(rlcf->from); |
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353 if (cidr == NULL) { |
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354 return NGX_CONF_ERROR; |
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355 } |
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356 |
3274 | 357 #if (NGX_HAVE_UNIX_DOMAIN) |
358 | |
359 if (ngx_strcmp(value[1].data, "unix:") == 0) { | |
6474 | 360 cidr->family = AF_UNIX; |
361 return NGX_CONF_OK; | |
3274 | 362 } |
363 | |
364 #endif | |
365 | |
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366 rc = ngx_ptocidr(&value[1], cidr); |
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367 |
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368 if (rc == NGX_ERROR) { |
573 | 369 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid parameter \"%V\"", |
370 &value[1]); | |
371 return NGX_CONF_ERROR; | |
372 } | |
373 | |
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374 if (rc == NGX_DONE) { |
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375 ngx_conf_log_error(NGX_LOG_WARN, cf, 0, |
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376 "low address bits of %V are meaningless", &value[1]); |
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377 } |
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378 |
573 | 379 return NGX_CONF_OK; |
380 } | |
381 | |
382 | |
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383 static char * |
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384 ngx_http_realip(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
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385 { |
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386 ngx_http_realip_loc_conf_t *rlcf = conf; |
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387 |
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388 ngx_str_t *value; |
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389 |
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390 value = cf->args->elts; |
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391 |
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392 if (ngx_strcmp(value[1].data, "X-Real-IP") == 0) { |
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393 rlcf->type = NGX_HTTP_REALIP_XREALIP; |
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394 return NGX_CONF_OK; |
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395 } |
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396 |
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397 if (ngx_strcmp(value[1].data, "X-Forwarded-For") == 0) { |
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398 rlcf->type = NGX_HTTP_REALIP_XFWD; |
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399 return NGX_CONF_OK; |
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400 } |
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401 |
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Added server-side support for PROXY protocol v1 (ticket #355).
Roman Arutyunyan <arut@nginx.com>
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diff
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|
402 if (ngx_strcmp(value[1].data, "proxy_protocol") == 0) { |
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403 rlcf->type = NGX_HTTP_REALIP_PROXY; |
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Added server-side support for PROXY protocol v1 (ticket #355).
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404 return NGX_CONF_OK; |
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diff
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405 } |
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Added server-side support for PROXY protocol v1 (ticket #355).
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406 |
2257
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407 rlcf->type = NGX_HTTP_REALIP_HEADER; |
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408 rlcf->hash = ngx_hash_strlow(value[1].data, value[1].data, value[1].len); |
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409 rlcf->header = value[1]; |
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410 |
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411 return NGX_CONF_OK; |
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412 } |
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413 |
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414 |
573 | 415 static void * |
416 ngx_http_realip_create_loc_conf(ngx_conf_t *cf) | |
417 { | |
418 ngx_http_realip_loc_conf_t *conf; | |
419 | |
420 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_realip_loc_conf_t)); | |
421 if (conf == NULL) { | |
2912
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diff
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|
422 return NULL; |
573 | 423 } |
424 | |
425 /* | |
426 * set by ngx_pcalloc(): | |
427 * | |
428 * conf->from = NULL; | |
2257
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429 * conf->hash = 0; |
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430 * conf->header = { 0, NULL }; |
573 | 431 */ |
432 | |
2257
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433 conf->type = NGX_CONF_UNSET_UINT; |
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|
434 conf->recursive = NGX_CONF_UNSET; |
573 | 435 |
436 return conf; | |
437 } | |
438 | |
439 | |
440 static char * | |
441 ngx_http_realip_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) | |
442 { | |
443 ngx_http_realip_loc_conf_t *prev = parent; | |
444 ngx_http_realip_loc_conf_t *conf = child; | |
445 | |
446 if (conf->from == NULL) { | |
447 conf->from = prev->from; | |
3305
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diff
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|
448 } |
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diff
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|
449 |
2257
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450 ngx_conf_merge_uint_value(conf->type, prev->type, NGX_HTTP_REALIP_XREALIP); |
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451 ngx_conf_merge_value(conf->recursive, prev->recursive, 0); |
2257
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452 |
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453 if (conf->header.len == 0) { |
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|
454 conf->hash = prev->hash; |
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455 conf->header = prev->header; |
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|
456 } |
573 | 457 |
458 return NGX_CONF_OK; | |
459 } | |
460 | |
461 | |
462 static ngx_int_t | |
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|
463 ngx_http_realip_add_variables(ngx_conf_t *cf) |
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|
464 { |
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|
465 ngx_http_variable_t *var, *v; |
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|
466 |
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diff
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|
467 for (v = ngx_http_realip_vars; v->name.len; v++) { |
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diff
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|
468 var = ngx_http_add_variable(cf, &v->name, v->flags); |
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diff
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|
469 if (var == NULL) { |
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diff
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|
470 return NGX_ERROR; |
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|
471 } |
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|
472 |
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diff
changeset
|
473 var->get_handler = v->get_handler; |
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diff
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|
474 var->data = v->data; |
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diff
changeset
|
475 } |
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diff
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|
476 |
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diff
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|
477 return NGX_OK; |
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diff
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|
478 } |
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diff
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|
479 |
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changeset
|
480 |
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changeset
|
481 static ngx_int_t |
681 | 482 ngx_http_realip_init(ngx_conf_t *cf) |
573 | 483 { |
484 ngx_http_handler_pt *h; | |
485 ngx_http_core_main_conf_t *cmcf; | |
486 | |
681 | 487 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); |
573 | 488 |
489 h = ngx_array_push(&cmcf->phases[NGX_HTTP_POST_READ_PHASE].handlers); | |
490 if (h == NULL) { | |
491 return NGX_ERROR; | |
492 } | |
493 | |
494 *h = ngx_http_realip_handler; | |
495 | |
581 | 496 h = ngx_array_push(&cmcf->phases[NGX_HTTP_PREACCESS_PHASE].handlers); |
573 | 497 if (h == NULL) { |
498 return NGX_ERROR; | |
499 } | |
500 | |
501 *h = ngx_http_realip_handler; | |
502 | |
503 return NGX_OK; | |
504 } | |
6294
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changeset
|
505 |
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diff
changeset
|
506 |
6562
b13d3a6f0512
Added the $realip_remote_port variable.
Dmitry Volyntsev <xeioex@nginx.com>
parents:
6474
diff
changeset
|
507 static ngx_http_realip_ctx_t * |
b13d3a6f0512
Added the $realip_remote_port variable.
Dmitry Volyntsev <xeioex@nginx.com>
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6474
diff
changeset
|
508 ngx_http_realip_get_module_ctx(ngx_http_request_t *r) |
6294
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|
509 { |
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diff
changeset
|
510 ngx_pool_cleanup_t *cln; |
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diff
changeset
|
511 ngx_http_realip_ctx_t *ctx; |
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|
512 |
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diff
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|
513 ctx = ngx_http_get_module_ctx(r, ngx_http_realip_module); |
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|
514 |
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|
515 if (ctx == NULL && (r->internal || r->filter_finalize)) { |
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|
516 |
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|
517 /* |
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|
518 * if module context was reset, the original address |
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diff
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|
519 * can still be found in the cleanup handler |
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diff
changeset
|
520 */ |
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diff
changeset
|
521 |
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Realip: the $realip_remote_addr variable.
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diff
changeset
|
522 for (cln = r->pool->cleanup; cln; cln = cln->next) { |
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diff
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|
523 if (cln->handler == ngx_http_realip_cleanup) { |
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diff
changeset
|
524 ctx = cln->data; |
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Realip: the $realip_remote_addr variable.
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diff
changeset
|
525 break; |
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Realip: the $realip_remote_addr variable.
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diff
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|
526 } |
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527 } |
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528 } |
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529 |
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530 return ctx; |
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531 } |
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532 |
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533 |
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534 static ngx_int_t |
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535 ngx_http_realip_remote_addr_variable(ngx_http_request_t *r, |
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536 ngx_http_variable_value_t *v, uintptr_t data) |
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537 { |
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538 ngx_str_t *addr_text; |
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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 |
6294
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543 addr_text = ctx ? &ctx->addr_text : &r->connection->addr_text; |
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544 |
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545 v->len = addr_text->len; |
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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 v->data = addr_text->data; |
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550 |
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551 return NGX_OK; |
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552 } |
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553 |
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554 |
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555 static ngx_int_t |
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556 ngx_http_realip_remote_port_variable(ngx_http_request_t *r, |
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557 ngx_http_variable_value_t *v, uintptr_t data) |
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558 { |
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559 ngx_uint_t port; |
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560 struct sockaddr *sa; |
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561 ngx_http_realip_ctx_t *ctx; |
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562 |
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563 ctx = ngx_http_realip_get_module_ctx(r); |
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564 |
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565 sa = ctx ? ctx->sockaddr : r->connection->sockaddr; |
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566 |
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567 v->len = 0; |
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568 v->valid = 1; |
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569 v->no_cacheable = 0; |
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570 v->not_found = 0; |
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571 |
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572 v->data = ngx_pnalloc(r->pool, sizeof("65535") - 1); |
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573 if (v->data == NULL) { |
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574 return NGX_ERROR; |
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575 } |
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576 |
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577 switch (sa->sa_family) { |
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578 |
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579 #if (NGX_HAVE_INET6) |
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580 case AF_INET6: |
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581 port = ntohs(((struct sockaddr_in6 *) sa)->sin6_port); |
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582 break; |
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583 #endif |
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584 |
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585 #if (NGX_HAVE_UNIX_DOMAIN) |
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586 case AF_UNIX: |
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587 port = 0; |
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588 break; |
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589 #endif |
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|
590 |
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591 default: /* AF_INET */ |
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592 port = ntohs(((struct sockaddr_in *) sa)->sin_port); |
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593 break; |
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594 } |
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|
595 |
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|
596 if (port > 0 && port < 65536) { |
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597 v->len = ngx_sprintf(v->data, "%ui", port) - v->data; |
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|
598 } |
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|
599 |
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|
600 return NGX_OK; |
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Added the $realip_remote_port variable.
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|
601 } |