Mercurial > hg > nginx-quic
annotate src/http/modules/ngx_http_realip_module.c @ 5846:cda4fcb9294c
Limit req: don't truncate key value to 255 bytes.
While the module allows to use values up to 65535 bytes as a key,
that actually never worked properly.
author | Valentin Bartenev <vbart@nginx.com> |
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date | Tue, 16 Sep 2014 21:12:51 +0400 |
parents | 3a72b1805c52 |
children | cebe43bace93 |
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); | |
681 | 46 static ngx_int_t ngx_http_realip_init(ngx_conf_t *cf); |
573 | 47 |
48 | |
49 static ngx_command_t ngx_http_realip_commands[] = { | |
50 | |
51 { ngx_string("set_real_ip_from"), | |
52 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
53 ngx_http_realip_from, | |
54 NGX_HTTP_LOC_CONF_OFFSET, | |
55 0, | |
56 NULL }, | |
57 | |
58 { ngx_string("real_ip_header"), | |
59 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
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60 ngx_http_realip, |
573 | 61 NGX_HTTP_LOC_CONF_OFFSET, |
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62 0, |
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63 NULL }, |
573 | 64 |
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65 { ngx_string("real_ip_recursive"), |
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66 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, |
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67 ngx_conf_set_flag_slot, |
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68 NGX_HTTP_LOC_CONF_OFFSET, |
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69 offsetof(ngx_http_realip_loc_conf_t, recursive), |
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70 NULL }, |
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71 |
573 | 72 ngx_null_command |
73 }; | |
74 | |
75 | |
76 | |
667 | 77 static ngx_http_module_t ngx_http_realip_module_ctx = { |
573 | 78 NULL, /* preconfiguration */ |
681 | 79 ngx_http_realip_init, /* postconfiguration */ |
573 | 80 |
81 NULL, /* create main configuration */ | |
82 NULL, /* init main configuration */ | |
83 | |
84 NULL, /* create server configuration */ | |
85 NULL, /* merge server configuration */ | |
86 | |
87 ngx_http_realip_create_loc_conf, /* create location configuration */ | |
88 ngx_http_realip_merge_loc_conf /* merge location configuration */ | |
89 }; | |
90 | |
91 | |
92 ngx_module_t ngx_http_realip_module = { | |
93 NGX_MODULE_V1, | |
94 &ngx_http_realip_module_ctx, /* module context */ | |
95 ngx_http_realip_commands, /* module directives */ | |
96 NGX_HTTP_MODULE, /* module type */ | |
97 NULL, /* init master */ | |
681 | 98 NULL, /* init module */ |
573 | 99 NULL, /* init process */ |
100 NULL, /* init thread */ | |
101 NULL, /* exit thread */ | |
102 NULL, /* exit process */ | |
103 NULL, /* exit master */ | |
104 NGX_MODULE_V1_PADDING | |
105 }; | |
106 | |
107 | |
108 static ngx_int_t | |
109 ngx_http_realip_handler(ngx_http_request_t *r) | |
110 { | |
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111 u_char *p; |
573 | 112 size_t len; |
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113 ngx_str_t *value; |
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114 ngx_uint_t i, hash; |
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115 ngx_addr_t addr; |
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116 ngx_array_t *xfwd; |
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117 ngx_list_part_t *part; |
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118 ngx_table_elt_t *header; |
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119 ngx_connection_t *c; |
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120 ngx_http_realip_ctx_t *ctx; |
573 | 121 ngx_http_realip_loc_conf_t *rlcf; |
122 | |
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123 ctx = ngx_http_get_module_ctx(r, ngx_http_realip_module); |
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124 |
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125 if (ctx) { |
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126 return NGX_DECLINED; |
573 | 127 } |
128 | |
129 rlcf = ngx_http_get_module_loc_conf(r, ngx_http_realip_module); | |
130 | |
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131 if (rlcf->from == NULL) { |
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132 return NGX_DECLINED; |
573 | 133 } |
134 | |
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135 switch (rlcf->type) { |
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136 |
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137 case NGX_HTTP_REALIP_XREALIP: |
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138 |
573 | 139 if (r->headers_in.x_real_ip == NULL) { |
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140 return NGX_DECLINED; |
573 | 141 } |
142 | |
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143 value = &r->headers_in.x_real_ip->value; |
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144 xfwd = NULL; |
573 | 145 |
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146 break; |
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147 |
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148 case NGX_HTTP_REALIP_XFWD: |
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149 |
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150 xfwd = &r->headers_in.x_forwarded_for; |
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151 |
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152 if (xfwd->elts == NULL) { |
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153 return NGX_DECLINED; |
573 | 154 } |
155 | |
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156 value = NULL; |
573 | 157 |
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158 break; |
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159 |
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160 case NGX_HTTP_REALIP_PROXY: |
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161 |
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162 value = &r->connection->proxy_protocol_addr; |
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163 |
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164 if (value->len == 0) { |
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165 return NGX_DECLINED; |
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166 } |
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167 |
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168 xfwd = NULL; |
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169 |
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170 break; |
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171 |
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172 default: /* NGX_HTTP_REALIP_HEADER */ |
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173 |
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174 part = &r->headers_in.headers.part; |
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175 header = part->elts; |
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176 |
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177 hash = rlcf->hash; |
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178 len = rlcf->header.len; |
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179 p = rlcf->header.data; |
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180 |
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181 for (i = 0; /* void */ ; i++) { |
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182 |
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183 if (i >= part->nelts) { |
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184 if (part->next == NULL) { |
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185 break; |
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186 } |
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187 |
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188 part = part->next; |
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189 header = part->elts; |
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190 i = 0; |
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191 } |
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192 |
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193 if (hash == header[i].hash |
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194 && len == header[i].key.len |
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195 && ngx_strncmp(p, header[i].lowcase_key, len) == 0) |
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196 { |
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197 value = &header[i].value; |
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198 xfwd = NULL; |
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199 |
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200 goto found; |
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201 } |
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202 } |
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203 |
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204 return NGX_DECLINED; |
573 | 205 } |
206 | |
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207 found: |
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208 |
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209 c = r->connection; |
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210 |
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211 addr.sockaddr = c->sockaddr; |
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212 addr.socklen = c->socklen; |
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213 /* addr.name = c->addr_text; */ |
3274 | 214 |
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215 if (ngx_http_get_forwarded_addr(r, &addr, xfwd, value, rlcf->from, |
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216 rlcf->recursive) |
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217 != NGX_DECLINED) |
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218 { |
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219 return ngx_http_realip_set_addr(r, &addr); |
3274 | 220 } |
221 | |
222 return NGX_DECLINED; | |
223 } | |
224 | |
573 | 225 |
3274 | 226 static ngx_int_t |
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227 ngx_http_realip_set_addr(ngx_http_request_t *r, ngx_addr_t *addr) |
3274 | 228 { |
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229 size_t len; |
3274 | 230 u_char *p; |
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231 u_char text[NGX_SOCKADDR_STRLEN]; |
3274 | 232 ngx_connection_t *c; |
233 ngx_pool_cleanup_t *cln; | |
234 ngx_http_realip_ctx_t *ctx; | |
573 | 235 |
3274 | 236 cln = ngx_pool_cleanup_add(r->pool, sizeof(ngx_http_realip_ctx_t)); |
237 if (cln == NULL) { | |
238 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
239 } | |
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240 |
3274 | 241 ctx = cln->data; |
242 ngx_http_set_ctx(r, ctx, ngx_http_realip_module); | |
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243 |
3274 | 244 c = r->connection; |
245 | |
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Core: extended ngx_sock_ntop() with socklen parameter.
Vladimir Homutov <vl@nginx.com>
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246 len = ngx_sock_ntop(addr->sockaddr, addr->socklen, text, |
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247 NGX_SOCKADDR_STRLEN, 0); |
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248 if (len == 0) { |
3274 | 249 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
250 } | |
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251 |
3274 | 252 p = ngx_pnalloc(c->pool, len); |
253 if (p == NULL) { | |
254 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
255 } | |
1118
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256 |
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257 ngx_memcpy(p, text, len); |
2176
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258 |
3274 | 259 cln->handler = ngx_http_realip_cleanup; |
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260 |
3274 | 261 ctx->connection = c; |
262 ctx->sockaddr = c->sockaddr; | |
263 ctx->socklen = c->socklen; | |
264 ctx->addr_text = c->addr_text; | |
573 | 265 |
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266 c->sockaddr = addr->sockaddr; |
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267 c->socklen = addr->socklen; |
3274 | 268 c->addr_text.len = len; |
269 c->addr_text.data = p; | |
573 | 270 |
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ngx_http_realip_module must return NGX_DECLINED
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271 return NGX_DECLINED; |
573 | 272 } |
273 | |
274 | |
2176
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275 static void |
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276 ngx_http_realip_cleanup(void *data) |
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277 { |
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278 ngx_http_realip_ctx_t *ctx = data; |
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279 |
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280 ngx_connection_t *c; |
2176
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281 |
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282 c = ctx->connection; |
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283 |
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284 c->sockaddr = ctx->sockaddr; |
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285 c->socklen = ctx->socklen; |
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286 c->addr_text = ctx->addr_text; |
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287 } |
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288 |
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289 |
573 | 290 static char * |
291 ngx_http_realip_from(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
292 { | |
293 ngx_http_realip_loc_conf_t *rlcf = conf; | |
294 | |
2257
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295 ngx_int_t rc; |
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296 ngx_str_t *value; |
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297 ngx_cidr_t *cidr; |
573 | 298 |
3274 | 299 value = cf->args->elts; |
300 | |
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301 if (rlcf->from == NULL) { |
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|
302 rlcf->from = ngx_array_create(cf->pool, 2, |
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|
303 sizeof(ngx_cidr_t)); |
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304 if (rlcf->from == NULL) { |
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305 return NGX_CONF_ERROR; |
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306 } |
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307 } |
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308 |
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309 cidr = ngx_array_push(rlcf->from); |
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310 if (cidr == NULL) { |
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311 return NGX_CONF_ERROR; |
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312 } |
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313 |
3274 | 314 #if (NGX_HAVE_UNIX_DOMAIN) |
315 | |
316 if (ngx_strcmp(value[1].data, "unix:") == 0) { | |
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317 cidr->family = AF_UNIX; |
3274 | 318 return NGX_CONF_OK; |
319 } | |
320 | |
321 #endif | |
322 | |
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323 rc = ngx_ptocidr(&value[1], cidr); |
1380
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|
324 |
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325 if (rc == NGX_ERROR) { |
573 | 326 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid parameter \"%V\"", |
327 &value[1]); | |
328 return NGX_CONF_ERROR; | |
329 } | |
330 | |
1380
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331 if (rc == NGX_DONE) { |
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332 ngx_conf_log_error(NGX_LOG_WARN, cf, 0, |
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333 "low address bits of %V are meaningless", &value[1]); |
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334 } |
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335 |
573 | 336 return NGX_CONF_OK; |
337 } | |
338 | |
339 | |
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340 static char * |
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341 ngx_http_realip(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
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342 { |
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343 ngx_http_realip_loc_conf_t *rlcf = conf; |
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344 |
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345 ngx_str_t *value; |
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346 |
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347 value = cf->args->elts; |
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348 |
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349 if (ngx_strcmp(value[1].data, "X-Real-IP") == 0) { |
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350 rlcf->type = NGX_HTTP_REALIP_XREALIP; |
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351 return NGX_CONF_OK; |
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352 } |
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353 |
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354 if (ngx_strcmp(value[1].data, "X-Forwarded-For") == 0) { |
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355 rlcf->type = NGX_HTTP_REALIP_XFWD; |
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356 return NGX_CONF_OK; |
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357 } |
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358 |
5605
3a72b1805c52
Added server-side support for PROXY protocol v1 (ticket #355).
Roman Arutyunyan <arut@nginx.com>
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5263
diff
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|
359 if (ngx_strcmp(value[1].data, "proxy_protocol") == 0) { |
3a72b1805c52
Added server-side support for PROXY protocol v1 (ticket #355).
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|
360 rlcf->type = NGX_HTTP_REALIP_PROXY; |
3a72b1805c52
Added server-side support for PROXY protocol v1 (ticket #355).
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|
361 return NGX_CONF_OK; |
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Added server-side support for PROXY protocol v1 (ticket #355).
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5263
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|
362 } |
3a72b1805c52
Added server-side support for PROXY protocol v1 (ticket #355).
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5263
diff
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|
363 |
2257
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|
364 rlcf->type = NGX_HTTP_REALIP_HEADER; |
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|
365 rlcf->hash = ngx_hash_strlow(value[1].data, value[1].data, value[1].len); |
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366 rlcf->header = value[1]; |
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367 |
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368 return NGX_CONF_OK; |
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369 } |
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370 |
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371 |
573 | 372 static void * |
373 ngx_http_realip_create_loc_conf(ngx_conf_t *cf) | |
374 { | |
375 ngx_http_realip_loc_conf_t *conf; | |
376 | |
377 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_realip_loc_conf_t)); | |
378 if (conf == NULL) { | |
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379 return NULL; |
573 | 380 } |
381 | |
382 /* | |
383 * set by ngx_pcalloc(): | |
384 * | |
385 * conf->from = NULL; | |
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386 * conf->hash = 0; |
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387 * conf->header = { 0, NULL }; |
573 | 388 */ |
389 | |
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390 conf->type = NGX_CONF_UNSET_UINT; |
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391 conf->recursive = NGX_CONF_UNSET; |
573 | 392 |
393 return conf; | |
394 } | |
395 | |
396 | |
397 static char * | |
398 ngx_http_realip_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) | |
399 { | |
400 ngx_http_realip_loc_conf_t *prev = parent; | |
401 ngx_http_realip_loc_conf_t *conf = child; | |
402 | |
403 if (conf->from == NULL) { | |
404 conf->from = prev->from; | |
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405 } |
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406 |
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407 ngx_conf_merge_uint_value(conf->type, prev->type, NGX_HTTP_REALIP_XREALIP); |
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408 ngx_conf_merge_value(conf->recursive, prev->recursive, 0); |
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409 |
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410 if (conf->header.len == 0) { |
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411 conf->hash = prev->hash; |
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412 conf->header = prev->header; |
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413 } |
573 | 414 |
415 return NGX_CONF_OK; | |
416 } | |
417 | |
418 | |
419 static ngx_int_t | |
681 | 420 ngx_http_realip_init(ngx_conf_t *cf) |
573 | 421 { |
422 ngx_http_handler_pt *h; | |
423 ngx_http_core_main_conf_t *cmcf; | |
424 | |
681 | 425 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); |
573 | 426 |
427 h = ngx_array_push(&cmcf->phases[NGX_HTTP_POST_READ_PHASE].handlers); | |
428 if (h == NULL) { | |
429 return NGX_ERROR; | |
430 } | |
431 | |
432 *h = ngx_http_realip_handler; | |
433 | |
581 | 434 h = ngx_array_push(&cmcf->phases[NGX_HTTP_PREACCESS_PHASE].handlers); |
573 | 435 if (h == NULL) { |
436 return NGX_ERROR; | |
437 } | |
438 | |
439 *h = ngx_http_realip_handler; | |
440 | |
441 return NGX_OK; | |
442 } |