Mercurial > hg > nginx-quic
annotate src/http/ngx_http_upstream.h @ 4664:356c91151658 stable-1.2
Merge of r4618: rewrite escaping fix (ticket #162).
The following code resulted in incorrect escaping of uri and possible
segfault:
location / {
rewrite ^(.*) $1?c=$1;
return 200 "$uri";
}
If there were arguments in a rewrite's replacement string, and length was
actually calculated (due to duplicate captures as in the example above,
or variables present), the is_args flag was set and incorrectly copied
after length calculation. This resulted in escaping applied to the uri part
of the replacement, resulting in incorrect escaping. Additionally, buffer
was allocated without escaping expected, thus this also resulted in buffer
overrun and possible segfault.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Mon, 04 Jun 2012 11:07:19 +0000 |
parents | 7bf3b68239a3 |
children | c9059bd5445b |
rev | line source |
---|---|
479 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4412 | 4 * Copyright (C) Nginx, Inc. |
479 | 5 */ |
6 | |
7 | |
8 #ifndef _NGX_HTTP_UPSTREAM_H_INCLUDED_ | |
9 #define _NGX_HTTP_UPSTREAM_H_INCLUDED_ | |
10 | |
11 | |
12 #include <ngx_config.h> | |
13 #include <ngx_core.h> | |
14 #include <ngx_event.h> | |
15 #include <ngx_event_connect.h> | |
16 #include <ngx_event_pipe.h> | |
17 #include <ngx_http.h> | |
18 | |
19 | |
665 | 20 #define NGX_HTTP_UPSTREAM_FT_ERROR 0x00000002 |
21 #define NGX_HTTP_UPSTREAM_FT_TIMEOUT 0x00000004 | |
22 #define NGX_HTTP_UPSTREAM_FT_INVALID_HEADER 0x00000008 | |
23 #define NGX_HTTP_UPSTREAM_FT_HTTP_500 0x00000010 | |
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24 #define NGX_HTTP_UPSTREAM_FT_HTTP_502 0x00000020 |
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25 #define NGX_HTTP_UPSTREAM_FT_HTTP_503 0x00000040 |
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26 #define NGX_HTTP_UPSTREAM_FT_HTTP_504 0x00000080 |
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27 #define NGX_HTTP_UPSTREAM_FT_HTTP_404 0x00000100 |
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28 #define NGX_HTTP_UPSTREAM_FT_UPDATING 0x00000200 |
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29 #define NGX_HTTP_UPSTREAM_FT_BUSY_LOCK 0x00000400 |
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30 #define NGX_HTTP_UPSTREAM_FT_MAX_WAITING 0x00000800 |
1378 | 31 #define NGX_HTTP_UPSTREAM_FT_NOLIVE 0x40000000 |
665 | 32 #define NGX_HTTP_UPSTREAM_FT_OFF 0x80000000 |
479 | 33 |
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34 #define NGX_HTTP_UPSTREAM_FT_STATUS (NGX_HTTP_UPSTREAM_FT_HTTP_500 \ |
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35 |NGX_HTTP_UPSTREAM_FT_HTTP_502 \ |
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36 |NGX_HTTP_UPSTREAM_FT_HTTP_503 \ |
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37 |NGX_HTTP_UPSTREAM_FT_HTTP_504 \ |
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38 |NGX_HTTP_UPSTREAM_FT_HTTP_404) |
479 | 39 |
40 #define NGX_HTTP_UPSTREAM_INVALID_HEADER 40 | |
41 | |
42 | |
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43 #define NGX_HTTP_UPSTREAM_IGN_XA_REDIRECT 0x00000002 |
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44 #define NGX_HTTP_UPSTREAM_IGN_XA_EXPIRES 0x00000004 |
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45 #define NGX_HTTP_UPSTREAM_IGN_EXPIRES 0x00000008 |
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46 #define NGX_HTTP_UPSTREAM_IGN_CACHE_CONTROL 0x00000010 |
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47 #define NGX_HTTP_UPSTREAM_IGN_SET_COOKIE 0x00000020 |
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48 #define NGX_HTTP_UPSTREAM_IGN_XA_LIMIT_RATE 0x00000040 |
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49 #define NGX_HTTP_UPSTREAM_IGN_XA_BUFFERING 0x00000080 |
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50 #define NGX_HTTP_UPSTREAM_IGN_XA_CHARSET 0x00000100 |
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51 |
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52 |
479 | 53 typedef struct { |
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54 ngx_msec_t bl_time; |
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55 ngx_uint_t bl_state; |
479 | 56 |
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57 ngx_uint_t status; |
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58 time_t response_sec; |
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59 ngx_uint_t response_msec; |
3795 | 60 off_t response_length; |
563 | 61 |
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62 ngx_str_t *peer; |
479 | 63 } ngx_http_upstream_state_t; |
64 | |
65 | |
66 typedef struct { | |
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67 ngx_hash_t headers_in_hash; |
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68 ngx_array_t upstreams; |
884 | 69 /* ngx_http_upstream_srv_conf_t */ |
509 | 70 } ngx_http_upstream_main_conf_t; |
71 | |
884 | 72 typedef struct ngx_http_upstream_srv_conf_s ngx_http_upstream_srv_conf_t; |
73 | |
74 typedef ngx_int_t (*ngx_http_upstream_init_pt)(ngx_conf_t *cf, | |
75 ngx_http_upstream_srv_conf_t *us); | |
76 typedef ngx_int_t (*ngx_http_upstream_init_peer_pt)(ngx_http_request_t *r, | |
77 ngx_http_upstream_srv_conf_t *us); | |
78 | |
79 | |
80 typedef struct { | |
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81 ngx_http_upstream_init_pt init_upstream; |
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82 ngx_http_upstream_init_peer_pt init; |
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83 void *data; |
884 | 84 } ngx_http_upstream_peer_t; |
85 | |
509 | 86 |
87 typedef struct { | |
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88 ngx_addr_t *addrs; |
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89 ngx_uint_t naddrs; |
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90 ngx_uint_t weight; |
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91 ngx_uint_t max_fails; |
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92 time_t fail_timeout; |
884 | 93 |
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94 unsigned down:1; |
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95 unsigned backup:1; |
884 | 96 } ngx_http_upstream_server_t; |
97 | |
651 | 98 |
884 | 99 #define NGX_HTTP_UPSTREAM_CREATE 0x0001 |
100 #define NGX_HTTP_UPSTREAM_WEIGHT 0x0002 | |
101 #define NGX_HTTP_UPSTREAM_MAX_FAILS 0x0004 | |
102 #define NGX_HTTP_UPSTREAM_FAIL_TIMEOUT 0x0008 | |
103 #define NGX_HTTP_UPSTREAM_DOWN 0x0010 | |
104 #define NGX_HTTP_UPSTREAM_BACKUP 0x0020 | |
105 | |
651 | 106 |
884 | 107 struct ngx_http_upstream_srv_conf_s { |
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108 ngx_http_upstream_peer_t peer; |
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109 void **srv_conf; |
884 | 110 |
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111 ngx_array_t *servers; /* ngx_http_upstream_server_t */ |
884 | 112 |
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113 ngx_uint_t flags; |
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114 ngx_str_t host; |
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115 u_char *file_name; |
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116 ngx_uint_t line; |
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117 in_port_t port; |
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118 in_port_t default_port; |
884 | 119 }; |
651 | 120 |
121 | |
122 typedef struct { | |
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123 ngx_http_upstream_srv_conf_t *upstream; |
884 | 124 |
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125 ngx_msec_t connect_timeout; |
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126 ngx_msec_t send_timeout; |
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127 ngx_msec_t read_timeout; |
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128 ngx_msec_t timeout; |
479 | 129 |
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130 size_t send_lowat; |
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131 size_t buffer_size; |
529 | 132 |
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133 size_t busy_buffers_size; |
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134 size_t max_temp_file_size; |
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135 size_t temp_file_write_size; |
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136 |
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137 size_t busy_buffers_size_conf; |
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138 size_t max_temp_file_size_conf; |
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139 size_t temp_file_write_size_conf; |
509 | 140 |
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141 ngx_bufs_t bufs; |
529 | 142 |
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143 ngx_uint_t ignore_headers; |
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144 ngx_uint_t next_upstream; |
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145 ngx_uint_t store_access; |
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146 ngx_flag_t buffering; |
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147 ngx_flag_t pass_request_headers; |
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148 ngx_flag_t pass_request_body; |
479 | 149 |
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150 ngx_flag_t ignore_client_abort; |
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151 ngx_flag_t intercept_errors; |
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152 ngx_flag_t cyclic_temp_file; |
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153 |
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154 ngx_path_t *temp_path; |
479 | 155 |
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156 ngx_hash_t hide_headers_hash; |
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157 ngx_array_t *hide_headers; |
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158 ngx_array_t *pass_headers; |
509 | 159 |
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160 ngx_addr_t *local; |
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161 |
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162 #if (NGX_HTTP_CACHE) |
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163 ngx_shm_zone_t *cache; |
479 | 164 |
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165 ngx_uint_t cache_min_uses; |
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166 ngx_uint_t cache_use_stale; |
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167 ngx_uint_t cache_methods; |
479 | 168 |
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169 ngx_flag_t cache_lock; |
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170 ngx_msec_t cache_lock_timeout; |
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171 |
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172 ngx_array_t *cache_valid; |
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173 ngx_array_t *cache_bypass; |
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174 ngx_array_t *no_cache; |
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175 #endif |
509 | 176 |
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177 ngx_array_t *store_lengths; |
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178 ngx_array_t *store_values; |
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179 |
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180 signed store:2; |
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181 unsigned intercept_404:1; |
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182 unsigned change_buffering:1; |
581 | 183 |
577 | 184 #if (NGX_HTTP_SSL) |
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185 ngx_ssl_t *ssl; |
2754 | 186 ngx_flag_t ssl_session_reuse; |
577 | 187 #endif |
188 | |
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189 ngx_str_t module; |
479 | 190 } ngx_http_upstream_conf_t; |
191 | |
192 | |
509 | 193 typedef struct { |
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194 ngx_str_t name; |
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195 ngx_http_header_handler_pt handler; |
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196 ngx_uint_t offset; |
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197 ngx_http_header_handler_pt copy_handler; |
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198 ngx_uint_t conf; |
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199 ngx_uint_t redirect; /* unsigned redirect:1; */ |
509 | 200 } ngx_http_upstream_header_t; |
201 | |
202 | |
203 typedef struct { | |
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204 ngx_list_t headers; |
509 | 205 |
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206 ngx_uint_t status_n; |
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207 ngx_str_t status_line; |
529 | 208 |
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209 ngx_table_elt_t *status; |
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210 ngx_table_elt_t *date; |
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211 ngx_table_elt_t *server; |
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212 ngx_table_elt_t *connection; |
509 | 213 |
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214 ngx_table_elt_t *expires; |
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215 ngx_table_elt_t *etag; |
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216 ngx_table_elt_t *x_accel_expires; |
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217 ngx_table_elt_t *x_accel_redirect; |
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218 ngx_table_elt_t *x_accel_limit_rate; |
509 | 219 |
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220 ngx_table_elt_t *content_type; |
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221 ngx_table_elt_t *content_length; |
509 | 222 |
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223 ngx_table_elt_t *last_modified; |
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224 ngx_table_elt_t *location; |
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225 ngx_table_elt_t *accept_ranges; |
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226 ngx_table_elt_t *www_authenticate; |
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227 ngx_table_elt_t *transfer_encoding; |
509 | 228 |
229 #if (NGX_HTTP_GZIP) | |
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230 ngx_table_elt_t *content_encoding; |
509 | 231 #endif |
232 | |
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233 off_t content_length_n; |
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234 |
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235 ngx_array_t cache_control; |
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236 |
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237 unsigned connection_close:1; |
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238 unsigned chunked:1; |
509 | 239 } ngx_http_upstream_headers_in_t; |
240 | |
479 | 241 |
1658 | 242 typedef struct { |
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243 ngx_str_t host; |
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244 in_port_t port; |
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245 ngx_uint_t no_port; /* unsigned no_port:1 */ |
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246 |
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247 ngx_uint_t naddrs; |
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248 in_addr_t *addrs; |
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249 |
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250 struct sockaddr *sockaddr; |
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251 socklen_t socklen; |
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252 |
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253 ngx_resolver_ctx_t *ctx; |
1658 | 254 } ngx_http_upstream_resolved_t; |
255 | |
256 | |
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257 typedef void (*ngx_http_upstream_handler_pt)(ngx_http_request_t *r, |
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258 ngx_http_upstream_t *u); |
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259 |
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260 |
479 | 261 struct ngx_http_upstream_s { |
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262 ngx_http_upstream_handler_pt read_event_handler; |
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263 ngx_http_upstream_handler_pt write_event_handler; |
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264 |
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265 ngx_peer_connection_t peer; |
479 | 266 |
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267 ngx_event_pipe_t *pipe; |
479 | 268 |
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269 ngx_chain_t *request_bufs; |
479 | 270 |
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271 ngx_output_chain_ctx_t output; |
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272 ngx_chain_writer_ctx_t writer; |
479 | 273 |
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274 ngx_http_upstream_conf_t *conf; |
479 | 275 |
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276 ngx_http_upstream_headers_in_t headers_in; |
509 | 277 |
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278 ngx_http_upstream_resolved_t *resolved; |
1658 | 279 |
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280 ngx_buf_t buffer; |
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281 off_t length; |
581 | 282 |
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283 ngx_chain_t *out_bufs; |
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284 ngx_chain_t *busy_bufs; |
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285 ngx_chain_t *free_bufs; |
581 | 286 |
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287 ngx_int_t (*input_filter_init)(void *data); |
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288 ngx_int_t (*input_filter)(void *data, ssize_t bytes); |
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289 void *input_filter_ctx; |
479 | 290 |
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291 #if (NGX_HTTP_CACHE) |
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292 ngx_int_t (*create_key)(ngx_http_request_t *r); |
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293 #endif |
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294 ngx_int_t (*create_request)(ngx_http_request_t *r); |
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295 ngx_int_t (*reinit_request)(ngx_http_request_t *r); |
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296 ngx_int_t (*process_header)(ngx_http_request_t *r); |
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297 void (*abort_request)(ngx_http_request_t *r); |
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298 void (*finalize_request)(ngx_http_request_t *r, |
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299 ngx_int_t rc); |
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300 ngx_int_t (*rewrite_redirect)(ngx_http_request_t *r, |
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301 ngx_table_elt_t *h, size_t prefix); |
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302 ngx_int_t (*rewrite_cookie)(ngx_http_request_t *r, |
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303 ngx_table_elt_t *h); |
479 | 304 |
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305 ngx_msec_t timeout; |
527 | 306 |
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307 ngx_http_upstream_state_t *state; |
479 | 308 |
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309 ngx_str_t method; |
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310 ngx_str_t schema; |
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311 ngx_str_t uri; |
555 | 312 |
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313 ngx_http_cleanup_pt *cleanup; |
569 | 314 |
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315 unsigned store:1; |
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316 unsigned cacheable:1; |
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317 unsigned accel:1; |
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318 unsigned ssl:1; |
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319 #if (NGX_HTTP_CACHE) |
2952 | 320 unsigned cache_status:3; |
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321 #endif |
479 | 322 |
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323 unsigned buffering:1; |
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324 unsigned keepalive:1; |
649 | 325 |
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326 unsigned request_sent:1; |
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327 unsigned header_sent:1; |
479 | 328 }; |
329 | |
330 | |
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331 typedef struct { |
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332 ngx_uint_t status; |
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333 ngx_uint_t mask; |
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334 } ngx_http_upstream_next_t; |
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335 |
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336 |
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337 typedef struct { |
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338 ngx_str_t key; |
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339 ngx_str_t value; |
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340 ngx_uint_t skip_empty; |
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341 } ngx_http_upstream_param_t; |
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342 |
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343 |
1162 | 344 ngx_int_t ngx_http_upstream_header_variable(ngx_http_request_t *r, |
345 ngx_http_variable_value_t *v, uintptr_t data); | |
346 | |
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347 ngx_int_t ngx_http_upstream_create(ngx_http_request_t *r); |
479 | 348 void ngx_http_upstream_init(ngx_http_request_t *r); |
651 | 349 ngx_http_upstream_srv_conf_t *ngx_http_upstream_add(ngx_conf_t *cf, |
884 | 350 ngx_url_t *u, ngx_uint_t flags); |
3399 | 351 char *ngx_http_upstream_bind_set_slot(ngx_conf_t *cf, ngx_command_t *cmd, |
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352 void *conf); |
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353 char *ngx_http_upstream_param_set_slot(ngx_conf_t *cf, ngx_command_t *cmd, |
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354 void *conf); |
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355 ngx_int_t ngx_http_upstream_hide_headers_hash(ngx_conf_t *cf, |
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356 ngx_http_upstream_conf_t *conf, ngx_http_upstream_conf_t *prev, |
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357 ngx_str_t *default_hide_headers, ngx_hash_init_t *hash); |
884 | 358 |
359 | |
360 #define ngx_http_conf_upstream_srv_conf(uscf, module) \ | |
361 uscf->srv_conf[module.ctx_index] | |
509 | 362 |
479 | 363 |
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364 extern ngx_module_t ngx_http_upstream_module; |
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365 extern ngx_conf_bitmask_t ngx_http_upstream_cache_method_mask[]; |
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366 extern ngx_conf_bitmask_t ngx_http_upstream_ignore_headers_masks[]; |
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367 |
479 | 368 |
369 #endif /* _NGX_HTTP_UPSTREAM_H_INCLUDED_ */ |