Mercurial > hg > nginx
annotate src/http/modules/ngx_http_limit_conn_module.c @ 7976:76aea0ad78e5
Contrib: vim syntax, update core and 3rd party module directives.
author | Gena Makhomed <gmm@csdoc.com> |
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date | Mon, 20 Dec 2021 20:02:48 +0200 |
parents | b45f052483b8 |
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rev | line source |
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980 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4412 | 4 * Copyright (C) Nginx, Inc. |
980 | 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_LIMIT_CONN_PASSED 1 |
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14 #define NGX_HTTP_LIMIT_CONN_REJECTED 2 |
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15 #define NGX_HTTP_LIMIT_CONN_REJECTED_DRY_RUN 3 |
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16 |
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17 |
980 | 18 typedef struct { |
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19 u_char color; |
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20 u_char len; |
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21 u_short conn; |
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22 u_char data[1]; |
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23 } ngx_http_limit_conn_node_t; |
980 | 24 |
25 | |
26 typedef struct { | |
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27 ngx_shm_zone_t *shm_zone; |
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28 ngx_rbtree_node_t *node; |
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29 } ngx_http_limit_conn_cleanup_t; |
980 | 30 |
31 | |
32 typedef struct { | |
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33 ngx_rbtree_t rbtree; |
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34 ngx_rbtree_node_t sentinel; |
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35 } ngx_http_limit_conn_shctx_t; |
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36 |
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37 |
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38 typedef struct { |
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39 ngx_http_limit_conn_shctx_t *sh; |
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40 ngx_slab_pool_t *shpool; |
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41 ngx_http_complex_value_t key; |
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42 } ngx_http_limit_conn_ctx_t; |
987 | 43 |
44 | |
45 typedef struct { | |
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46 ngx_shm_zone_t *shm_zone; |
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47 ngx_uint_t conn; |
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48 } ngx_http_limit_conn_limit_t; |
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49 |
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50 |
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51 typedef struct { |
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52 ngx_array_t limits; |
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53 ngx_uint_t log_level; |
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54 ngx_uint_t status_code; |
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55 ngx_flag_t dry_run; |
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56 } ngx_http_limit_conn_conf_t; |
980 | 57 |
58 | |
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59 static ngx_rbtree_node_t *ngx_http_limit_conn_lookup(ngx_rbtree_t *rbtree, |
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60 ngx_str_t *key, uint32_t hash); |
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61 static void ngx_http_limit_conn_cleanup(void *data); |
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62 static ngx_inline void ngx_http_limit_conn_cleanup_all(ngx_pool_t *pool); |
980 | 63 |
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64 static ngx_int_t ngx_http_limit_conn_status_variable(ngx_http_request_t *r, |
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65 ngx_http_variable_value_t *v, uintptr_t data); |
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66 static void *ngx_http_limit_conn_create_conf(ngx_conf_t *cf); |
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67 static char *ngx_http_limit_conn_merge_conf(ngx_conf_t *cf, void *parent, |
980 | 68 void *child); |
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69 static char *ngx_http_limit_conn_zone(ngx_conf_t *cf, ngx_command_t *cmd, |
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70 void *conf); |
980 | 71 static char *ngx_http_limit_conn(ngx_conf_t *cf, ngx_command_t *cmd, |
72 void *conf); | |
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73 static ngx_int_t ngx_http_limit_conn_add_variables(ngx_conf_t *cf); |
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74 static ngx_int_t ngx_http_limit_conn_init(ngx_conf_t *cf); |
980 | 75 |
76 | |
3186 | 77 static ngx_conf_enum_t ngx_http_limit_conn_log_levels[] = { |
78 { ngx_string("info"), NGX_LOG_INFO }, | |
79 { ngx_string("notice"), NGX_LOG_NOTICE }, | |
80 { ngx_string("warn"), NGX_LOG_WARN }, | |
81 { ngx_string("error"), NGX_LOG_ERR }, | |
82 { ngx_null_string, 0 } | |
83 }; | |
84 | |
85 | |
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86 static ngx_conf_num_bounds_t ngx_http_limit_conn_status_bounds = { |
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87 ngx_conf_check_num_bounds, 400, 599 |
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88 }; |
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89 |
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90 |
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91 static ngx_command_t ngx_http_limit_conn_commands[] = { |
980 | 92 |
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93 { ngx_string("limit_conn_zone"), |
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94 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE2, |
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95 ngx_http_limit_conn_zone, |
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96 0, |
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97 0, |
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98 NULL }, |
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99 |
980 | 100 { ngx_string("limit_conn"), |
987 | 101 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2, |
980 | 102 ngx_http_limit_conn, |
103 NGX_HTTP_LOC_CONF_OFFSET, | |
104 0, | |
105 NULL }, | |
106 | |
3186 | 107 { ngx_string("limit_conn_log_level"), |
108 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
109 ngx_conf_set_enum_slot, | |
110 NGX_HTTP_LOC_CONF_OFFSET, | |
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111 offsetof(ngx_http_limit_conn_conf_t, log_level), |
3186 | 112 &ngx_http_limit_conn_log_levels }, |
113 | |
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114 { ngx_string("limit_conn_status"), |
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115 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, |
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116 ngx_conf_set_num_slot, |
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117 NGX_HTTP_LOC_CONF_OFFSET, |
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118 offsetof(ngx_http_limit_conn_conf_t, status_code), |
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119 &ngx_http_limit_conn_status_bounds }, |
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120 |
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121 { ngx_string("limit_conn_dry_run"), |
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122 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, |
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123 ngx_conf_set_flag_slot, |
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124 NGX_HTTP_LOC_CONF_OFFSET, |
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125 offsetof(ngx_http_limit_conn_conf_t, dry_run), |
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126 NULL }, |
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127 |
980 | 128 ngx_null_command |
129 }; | |
130 | |
131 | |
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132 static ngx_http_module_t ngx_http_limit_conn_module_ctx = { |
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133 ngx_http_limit_conn_add_variables, /* preconfiguration */ |
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134 ngx_http_limit_conn_init, /* postconfiguration */ |
980 | 135 |
136 NULL, /* create main configuration */ | |
137 NULL, /* init main configuration */ | |
138 | |
139 NULL, /* create server configuration */ | |
140 NULL, /* merge server configuration */ | |
141 | |
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142 ngx_http_limit_conn_create_conf, /* create location configuration */ |
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143 ngx_http_limit_conn_merge_conf /* merge location configuration */ |
980 | 144 }; |
145 | |
146 | |
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147 ngx_module_t ngx_http_limit_conn_module = { |
980 | 148 NGX_MODULE_V1, |
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149 &ngx_http_limit_conn_module_ctx, /* module context */ |
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150 ngx_http_limit_conn_commands, /* module directives */ |
980 | 151 NGX_HTTP_MODULE, /* module type */ |
152 NULL, /* init master */ | |
153 NULL, /* init module */ | |
154 NULL, /* init process */ | |
155 NULL, /* init thread */ | |
156 NULL, /* exit thread */ | |
157 NULL, /* exit process */ | |
158 NULL, /* exit master */ | |
159 NGX_MODULE_V1_PADDING | |
160 }; | |
161 | |
162 | |
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163 static ngx_http_variable_t ngx_http_limit_conn_vars[] = { |
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164 |
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165 { ngx_string("limit_conn_status"), NULL, |
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166 ngx_http_limit_conn_status_variable, 0, NGX_HTTP_VAR_NOCACHEABLE, 0 }, |
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167 |
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168 ngx_http_null_variable |
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169 }; |
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170 |
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171 |
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172 static ngx_str_t ngx_http_limit_conn_status[] = { |
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173 ngx_string("PASSED"), |
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174 ngx_string("REJECTED"), |
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175 ngx_string("REJECTED_DRY_RUN") |
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176 }; |
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177 |
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178 |
980 | 179 static ngx_int_t |
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180 ngx_http_limit_conn_handler(ngx_http_request_t *r) |
980 | 181 { |
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182 size_t n; |
980 | 183 uint32_t hash; |
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184 ngx_str_t key; |
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185 ngx_uint_t i; |
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186 ngx_rbtree_node_t *node; |
980 | 187 ngx_pool_cleanup_t *cln; |
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188 ngx_http_limit_conn_ctx_t *ctx; |
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189 ngx_http_limit_conn_node_t *lc; |
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190 ngx_http_limit_conn_conf_t *lccf; |
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191 ngx_http_limit_conn_limit_t *limits; |
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192 ngx_http_limit_conn_cleanup_t *lccln; |
980 | 193 |
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194 if (r->main->limit_conn_status) { |
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195 return NGX_DECLINED; |
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196 } |
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197 |
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198 lccf = ngx_http_get_module_loc_conf(r, ngx_http_limit_conn_module); |
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199 limits = lccf->limits.elts; |
980 | 200 |
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201 for (i = 0; i < lccf->limits.nelts; i++) { |
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202 ctx = limits[i].shm_zone->data; |
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203 |
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204 if (ngx_http_complex_value(r, &ctx->key, &key) != NGX_OK) { |
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205 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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206 } |
980 | 207 |
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208 if (key.len == 0) { |
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209 continue; |
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210 } |
980 | 211 |
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212 if (key.len > 255) { |
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213 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
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214 "the value of the \"%V\" key " |
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215 "is more than 255 bytes: \"%V\"", |
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216 &ctx->key.value, &key); |
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217 continue; |
980 | 218 } |
219 | |
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220 r->main->limit_conn_status = NGX_HTTP_LIMIT_CONN_PASSED; |
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221 |
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222 hash = ngx_crc32_short(key.data, key.len); |
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223 |
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224 ngx_shmtx_lock(&ctx->shpool->mutex); |
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225 |
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226 node = ngx_http_limit_conn_lookup(&ctx->sh->rbtree, &key, hash); |
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227 |
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228 if (node == NULL) { |
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229 |
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230 n = offsetof(ngx_rbtree_node_t, color) |
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231 + offsetof(ngx_http_limit_conn_node_t, data) |
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232 + key.len; |
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233 |
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234 node = ngx_slab_alloc_locked(ctx->shpool, n); |
980 | 235 |
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236 if (node == NULL) { |
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237 ngx_shmtx_unlock(&ctx->shpool->mutex); |
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238 ngx_http_limit_conn_cleanup_all(r->pool); |
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239 |
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240 if (lccf->dry_run) { |
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241 r->main->limit_conn_status = |
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242 NGX_HTTP_LIMIT_CONN_REJECTED_DRY_RUN; |
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243 return NGX_DECLINED; |
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244 } |
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245 |
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246 r->main->limit_conn_status = NGX_HTTP_LIMIT_CONN_REJECTED; |
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247 |
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248 return lccf->status_code; |
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249 } |
2373 | 250 |
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251 lc = (ngx_http_limit_conn_node_t *) &node->color; |
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252 |
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253 node->key = hash; |
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254 lc->len = (u_char) key.len; |
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255 lc->conn = 1; |
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256 ngx_memcpy(lc->data, key.data, key.len); |
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257 |
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258 ngx_rbtree_insert(&ctx->sh->rbtree, node); |
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259 |
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260 } else { |
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261 |
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262 lc = (ngx_http_limit_conn_node_t *) &node->color; |
980 | 263 |
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264 if ((ngx_uint_t) lc->conn >= limits[i].conn) { |
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265 |
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266 ngx_shmtx_unlock(&ctx->shpool->mutex); |
980 | 267 |
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268 ngx_log_error(lccf->log_level, r->connection->log, 0, |
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269 "limiting connections%s by zone \"%V\"", |
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270 lccf->dry_run ? ", dry run," : "", |
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271 &limits[i].shm_zone->shm.name); |
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272 |
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273 ngx_http_limit_conn_cleanup_all(r->pool); |
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274 |
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275 if (lccf->dry_run) { |
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276 r->main->limit_conn_status = |
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277 NGX_HTTP_LIMIT_CONN_REJECTED_DRY_RUN; |
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278 return NGX_DECLINED; |
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279 } |
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280 |
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281 r->main->limit_conn_status = NGX_HTTP_LIMIT_CONN_REJECTED; |
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282 |
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283 return lccf->status_code; |
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284 } |
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285 |
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286 lc->conn++; |
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287 } |
980 | 288 |
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289 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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980 | 291 |
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292 ngx_shmtx_unlock(&ctx->shpool->mutex); |
980 | 293 |
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294 cln = ngx_pool_cleanup_add(r->pool, |
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295 sizeof(ngx_http_limit_conn_cleanup_t)); |
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296 if (cln == NULL) { |
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297 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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298 } |
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300 cln->handler = ngx_http_limit_conn_cleanup; |
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301 lccln = cln->data; |
980 | 302 |
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303 lccln->shm_zone = limits[i].shm_zone; |
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304 lccln->node = node; |
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305 } |
980 | 306 |
307 return NGX_DECLINED; | |
308 } | |
309 | |
310 | |
311 static void | |
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312 ngx_http_limit_conn_rbtree_insert_value(ngx_rbtree_node_t *temp, |
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313 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel) |
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314 { |
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315 ngx_rbtree_node_t **p; |
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316 ngx_http_limit_conn_node_t *lcn, *lcnt; |
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317 |
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318 for ( ;; ) { |
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319 |
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320 if (node->key < temp->key) { |
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321 |
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322 p = &temp->left; |
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323 |
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324 } else if (node->key > temp->key) { |
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325 |
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326 p = &temp->right; |
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327 |
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328 } else { /* node->key == temp->key */ |
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329 |
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330 lcn = (ngx_http_limit_conn_node_t *) &node->color; |
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331 lcnt = (ngx_http_limit_conn_node_t *) &temp->color; |
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332 |
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333 p = (ngx_memn2cmp(lcn->data, lcnt->data, lcn->len, lcnt->len) < 0) |
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334 ? &temp->left : &temp->right; |
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335 } |
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336 |
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337 if (*p == sentinel) { |
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338 break; |
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339 } |
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340 |
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341 temp = *p; |
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342 } |
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343 |
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344 *p = node; |
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345 node->parent = temp; |
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346 node->left = sentinel; |
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347 node->right = sentinel; |
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348 ngx_rbt_red(node); |
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349 } |
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350 |
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351 |
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352 static ngx_rbtree_node_t * |
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353 ngx_http_limit_conn_lookup(ngx_rbtree_t *rbtree, ngx_str_t *key, uint32_t hash) |
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354 { |
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355 ngx_int_t rc; |
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356 ngx_rbtree_node_t *node, *sentinel; |
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357 ngx_http_limit_conn_node_t *lcn; |
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358 |
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359 node = rbtree->root; |
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360 sentinel = rbtree->sentinel; |
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361 |
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362 while (node != sentinel) { |
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363 |
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364 if (hash < node->key) { |
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365 node = node->left; |
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366 continue; |
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367 } |
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368 |
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369 if (hash > node->key) { |
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370 node = node->right; |
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371 continue; |
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372 } |
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373 |
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374 /* hash == node->key */ |
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375 |
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376 lcn = (ngx_http_limit_conn_node_t *) &node->color; |
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377 |
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378 rc = ngx_memn2cmp(key->data, lcn->data, key->len, (size_t) lcn->len); |
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379 |
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380 if (rc == 0) { |
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381 return node; |
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382 } |
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383 |
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384 node = (rc < 0) ? node->left : node->right; |
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385 } |
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386 |
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387 return NULL; |
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388 } |
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389 |
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390 |
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391 static void |
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392 ngx_http_limit_conn_cleanup(void *data) |
980 | 393 { |
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394 ngx_http_limit_conn_cleanup_t *lccln = data; |
980 | 395 |
396 ngx_rbtree_node_t *node; | |
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397 ngx_http_limit_conn_ctx_t *ctx; |
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398 ngx_http_limit_conn_node_t *lc; |
980 | 399 |
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400 ctx = lccln->shm_zone->data; |
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401 node = lccln->node; |
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402 lc = (ngx_http_limit_conn_node_t *) &node->color; |
980 | 403 |
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404 ngx_shmtx_lock(&ctx->shpool->mutex); |
980 | 405 |
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406 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, lccln->shm_zone->shm.log, 0, |
6480 | 407 "limit conn cleanup: %08Xi %d", node->key, lc->conn); |
980 | 408 |
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409 lc->conn--; |
980 | 410 |
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411 if (lc->conn == 0) { |
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412 ngx_rbtree_delete(&ctx->sh->rbtree, node); |
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413 ngx_slab_free_locked(ctx->shpool, node); |
980 | 414 } |
415 | |
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416 ngx_shmtx_unlock(&ctx->shpool->mutex); |
980 | 417 } |
418 | |
419 | |
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420 static ngx_inline void |
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421 ngx_http_limit_conn_cleanup_all(ngx_pool_t *pool) |
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422 { |
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423 ngx_pool_cleanup_t *cln; |
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424 |
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425 cln = pool->cleanup; |
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426 |
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427 while (cln && cln->handler == ngx_http_limit_conn_cleanup) { |
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428 ngx_http_limit_conn_cleanup(cln->data); |
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429 cln = cln->next; |
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changeset
|
430 } |
b86cceba426a
Limit zone: support for multiple "limit_conn" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4270
diff
changeset
|
431 |
b86cceba426a
Limit zone: support for multiple "limit_conn" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
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diff
changeset
|
432 pool->cleanup = cln; |
b86cceba426a
Limit zone: support for multiple "limit_conn" limits.
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parents:
4270
diff
changeset
|
433 } |
b86cceba426a
Limit zone: support for multiple "limit_conn" limits.
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parents:
4270
diff
changeset
|
434 |
b86cceba426a
Limit zone: support for multiple "limit_conn" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4270
diff
changeset
|
435 |
980 | 436 static ngx_int_t |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
4272
diff
changeset
|
437 ngx_http_limit_conn_init_zone(ngx_shm_zone_t *shm_zone, void *data) |
980 | 438 { |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
4272
diff
changeset
|
439 ngx_http_limit_conn_ctx_t *octx = data; |
993
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
440 |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2373
diff
changeset
|
441 size_t len; |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
4272
diff
changeset
|
442 ngx_http_limit_conn_ctx_t *ctx; |
980 | 443 |
993
1b9a4d92173f
pass the inherited shm_zone data
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parents:
987
diff
changeset
|
444 ctx = shm_zone->data; |
1b9a4d92173f
pass the inherited shm_zone data
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parents:
987
diff
changeset
|
445 |
1b9a4d92173f
pass the inherited shm_zone data
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diff
changeset
|
446 if (octx) { |
5860
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
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parents:
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diff
changeset
|
447 if (ctx->key.value.len != octx->key.value.len |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
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diff
changeset
|
448 || ngx_strncmp(ctx->key.value.data, octx->key.value.data, |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
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diff
changeset
|
449 ctx->key.value.len) |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
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diff
changeset
|
450 != 0) |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
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diff
changeset
|
451 { |
993
1b9a4d92173f
pass the inherited shm_zone data
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diff
changeset
|
452 ngx_log_error(NGX_LOG_EMERG, shm_zone->shm.log, 0, |
5860
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Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
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diff
changeset
|
453 "limit_conn_zone \"%V\" uses the \"%V\" key " |
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Limit conn: use complex value in limit_conn_zone (ticket #121).
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diff
changeset
|
454 "while previously it used the \"%V\" key", |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
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parents:
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diff
changeset
|
455 &shm_zone->shm.name, &ctx->key.value, |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
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parents:
5859
diff
changeset
|
456 &octx->key.value); |
993
1b9a4d92173f
pass the inherited shm_zone data
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parents:
987
diff
changeset
|
457 return NGX_ERROR; |
1b9a4d92173f
pass the inherited shm_zone data
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parents:
987
diff
changeset
|
458 } |
1b9a4d92173f
pass the inherited shm_zone data
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987
diff
changeset
|
459 |
7596
b45f052483b8
Limit conn: added shared context.
Roman Arutyunyan <arut@nginx.com>
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diff
changeset
|
460 ctx->sh = octx->sh; |
b45f052483b8
Limit conn: added shared context.
Roman Arutyunyan <arut@nginx.com>
parents:
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diff
changeset
|
461 ctx->shpool = octx->shpool; |
993
1b9a4d92173f
pass the inherited shm_zone data
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parents:
987
diff
changeset
|
462 |
1b9a4d92173f
pass the inherited shm_zone data
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987
diff
changeset
|
463 return NGX_OK; |
1b9a4d92173f
pass the inherited shm_zone data
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parents:
987
diff
changeset
|
464 } |
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
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diff
changeset
|
465 |
7596
b45f052483b8
Limit conn: added shared context.
Roman Arutyunyan <arut@nginx.com>
parents:
7595
diff
changeset
|
466 ctx->shpool = (ngx_slab_pool_t *) shm_zone->shm.addr; |
980 | 467 |
2720
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
468 if (shm_zone->shm.exists) { |
7596
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Limit conn: added shared context.
Roman Arutyunyan <arut@nginx.com>
parents:
7595
diff
changeset
|
469 ctx->sh = ctx->shpool->data; |
2720
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support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
470 |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
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diff
changeset
|
471 return NGX_OK; |
b3b8c66bd520
support attaching to an existent Win32 shared memory
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2716
diff
changeset
|
472 } |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
473 |
7596
b45f052483b8
Limit conn: added shared context.
Roman Arutyunyan <arut@nginx.com>
parents:
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diff
changeset
|
474 ctx->sh = ngx_slab_alloc(ctx->shpool, sizeof(ngx_http_limit_conn_shctx_t)); |
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Limit conn: added shared context.
Roman Arutyunyan <arut@nginx.com>
parents:
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diff
changeset
|
475 if (ctx->sh == NULL) { |
980 | 476 return NGX_ERROR; |
477 } | |
478 | |
7596
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Limit conn: added shared context.
Roman Arutyunyan <arut@nginx.com>
parents:
7595
diff
changeset
|
479 ctx->shpool->data = ctx->sh; |
2720
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
480 |
7596
b45f052483b8
Limit conn: added shared context.
Roman Arutyunyan <arut@nginx.com>
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7595
diff
changeset
|
481 ngx_rbtree_init(&ctx->sh->rbtree, &ctx->sh->sentinel, |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
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diff
changeset
|
482 ngx_http_limit_conn_rbtree_insert_value); |
980 | 483 |
4272
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
484 len = sizeof(" in limit_conn_zone \"\"") + shm_zone->shm.name.len; |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
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diff
changeset
|
485 |
7596
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Limit conn: added shared context.
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diff
changeset
|
486 ctx->shpool->log_ctx = ngx_slab_alloc(ctx->shpool, len); |
b45f052483b8
Limit conn: added shared context.
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diff
changeset
|
487 if (ctx->shpool->log_ctx == NULL) { |
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|
488 return NGX_ERROR; |
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|
489 } |
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improve ngx_slab_alloc() error logging
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diff
changeset
|
490 |
7596
b45f052483b8
Limit conn: added shared context.
Roman Arutyunyan <arut@nginx.com>
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7595
diff
changeset
|
491 ngx_sprintf(ctx->shpool->log_ctx, " in limit_conn_zone \"%V\"%Z", |
2716
d5896f6608e8
move zone name from ngx_shm_zone_t to ngx_shm_t to use Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2612
diff
changeset
|
492 &shm_zone->shm.name); |
2611
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diff
changeset
|
493 |
980 | 494 return NGX_OK; |
495 } | |
496 | |
497 | |
7595
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
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diff
changeset
|
498 static ngx_int_t |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
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diff
changeset
|
499 ngx_http_limit_conn_status_variable(ngx_http_request_t *r, |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
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|
500 ngx_http_variable_value_t *v, uintptr_t data) |
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Limit conn: $limit_conn_status variable.
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changeset
|
501 { |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
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7594
diff
changeset
|
502 if (r->main->limit_conn_status == 0) { |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
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diff
changeset
|
503 v->not_found = 1; |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
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7594
diff
changeset
|
504 return NGX_OK; |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
parents:
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diff
changeset
|
505 } |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
parents:
7594
diff
changeset
|
506 |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
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7594
diff
changeset
|
507 v->valid = 1; |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
parents:
7594
diff
changeset
|
508 v->no_cacheable = 0; |
9606d93aa586
Limit conn: $limit_conn_status variable.
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parents:
7594
diff
changeset
|
509 v->not_found = 0; |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
parents:
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diff
changeset
|
510 v->len = ngx_http_limit_conn_status[r->main->limit_conn_status - 1].len; |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
parents:
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diff
changeset
|
511 v->data = ngx_http_limit_conn_status[r->main->limit_conn_status - 1].data; |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
parents:
7594
diff
changeset
|
512 |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
parents:
7594
diff
changeset
|
513 return NGX_OK; |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
parents:
7594
diff
changeset
|
514 } |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
parents:
7594
diff
changeset
|
515 |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
parents:
7594
diff
changeset
|
516 |
980 | 517 static void * |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
4272
diff
changeset
|
518 ngx_http_limit_conn_create_conf(ngx_conf_t *cf) |
980 | 519 { |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
4272
diff
changeset
|
520 ngx_http_limit_conn_conf_t *conf; |
980 | 521 |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
4272
diff
changeset
|
522 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_conn_conf_t)); |
980 | 523 if (conf == NULL) { |
2912
c7d57b539248
return NULL instead of NGX_CONF_ERROR on a create conf failure
Igor Sysoev <igor@sysoev.ru>
parents:
2720
diff
changeset
|
524 return NULL; |
980 | 525 } |
526 | |
527 /* | |
528 * set by ngx_pcalloc(): | |
529 * | |
4271
b86cceba426a
Limit zone: support for multiple "limit_conn" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4270
diff
changeset
|
530 * conf->limits.elts = NULL; |
980 | 531 */ |
532 | |
3186 | 533 conf->log_level = NGX_CONF_UNSET_UINT; |
5117
00e4459739ed
The limit_req_status and limit_conn_status directives.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4972
diff
changeset
|
534 conf->status_code = NGX_CONF_UNSET_UINT; |
7594
359b0ea2b067
Limit conn: limit_conn_dry_run directive.
Roman Arutyunyan <arut@nginx.com>
parents:
6480
diff
changeset
|
535 conf->dry_run = NGX_CONF_UNSET; |
3186 | 536 |
980 | 537 return conf; |
538 } | |
539 | |
540 | |
541 static char * | |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
4272
diff
changeset
|
542 ngx_http_limit_conn_merge_conf(ngx_conf_t *cf, void *parent, void *child) |
980 | 543 { |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
4272
diff
changeset
|
544 ngx_http_limit_conn_conf_t *prev = parent; |
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
4272
diff
changeset
|
545 ngx_http_limit_conn_conf_t *conf = child; |
980 | 546 |
4271
b86cceba426a
Limit zone: support for multiple "limit_conn" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4270
diff
changeset
|
547 if (conf->limits.elts == NULL) { |
4380
7697412a0921
Fixed limit_conn_log_level/limit_req_log_level inheritance.
Valentin Bartenev <vbart@nginx.com>
parents:
4280
diff
changeset
|
548 conf->limits = prev->limits; |
980 | 549 } |
550 | |
3186 | 551 ngx_conf_merge_uint_value(conf->log_level, prev->log_level, NGX_LOG_ERR); |
5117
00e4459739ed
The limit_req_status and limit_conn_status directives.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4972
diff
changeset
|
552 ngx_conf_merge_uint_value(conf->status_code, prev->status_code, |
00e4459739ed
The limit_req_status and limit_conn_status directives.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4972
diff
changeset
|
553 NGX_HTTP_SERVICE_UNAVAILABLE); |
3186 | 554 |
7594
359b0ea2b067
Limit conn: limit_conn_dry_run directive.
Roman Arutyunyan <arut@nginx.com>
parents:
6480
diff
changeset
|
555 ngx_conf_merge_value(conf->dry_run, prev->dry_run, 0); |
359b0ea2b067
Limit conn: limit_conn_dry_run directive.
Roman Arutyunyan <arut@nginx.com>
parents:
6480
diff
changeset
|
556 |
980 | 557 return NGX_CONF_OK; |
558 } | |
559 | |
560 | |
561 static char * | |
4272
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
562 ngx_http_limit_conn_zone(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
563 { |
5860
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
564 u_char *p; |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
565 ssize_t size; |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
566 ngx_str_t *value, name, s; |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
567 ngx_uint_t i; |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
568 ngx_shm_zone_t *shm_zone; |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
569 ngx_http_limit_conn_ctx_t *ctx; |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
570 ngx_http_compile_complex_value_t ccv; |
4272
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
571 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
572 value = cf->args->elts; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
573 |
5860
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
574 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_conn_ctx_t)); |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
575 if (ctx == NULL) { |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
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changeset
|
576 return NGX_CONF_ERROR; |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
577 } |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
578 |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
579 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
580 |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
581 ccv.cf = cf; |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
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diff
changeset
|
582 ccv.value = &value[1]; |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
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diff
changeset
|
583 ccv.complex_value = &ctx->key; |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
584 |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
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parents:
5859
diff
changeset
|
585 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
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diff
changeset
|
586 return NGX_CONF_ERROR; |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
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parents:
5859
diff
changeset
|
587 } |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
588 |
4272
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Limit zone: added the "limit_conn_zone" directive.
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|
589 size = 0; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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changeset
|
590 name.len = 0; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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parents:
4271
diff
changeset
|
591 |
5860
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
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parents:
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diff
changeset
|
592 for (i = 2; i < cf->args->nelts; i++) { |
4272
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Limit zone: added the "limit_conn_zone" directive.
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diff
changeset
|
593 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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diff
changeset
|
594 if (ngx_strncmp(value[i].data, "zone=", 5) == 0) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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diff
changeset
|
595 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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changeset
|
596 name.data = value[i].data + 5; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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changeset
|
597 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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diff
changeset
|
598 p = (u_char *) ngx_strchr(name.data, ':'); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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diff
changeset
|
599 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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diff
changeset
|
600 if (p == NULL) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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changeset
|
601 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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diff
changeset
|
602 "invalid zone size \"%V\"", &value[i]); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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parents:
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|
603 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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diff
changeset
|
604 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
605 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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diff
changeset
|
606 name.len = p - name.data; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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diff
changeset
|
607 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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diff
changeset
|
608 s.data = p + 1; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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diff
changeset
|
609 s.len = value[i].data + value[i].len - s.data; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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changeset
|
610 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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changeset
|
611 size = ngx_parse_size(&s); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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|
612 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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changeset
|
613 if (size == NGX_ERROR) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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changeset
|
614 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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changeset
|
615 "invalid zone size \"%V\"", &value[i]); |
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Limit zone: added the "limit_conn_zone" directive.
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|
616 return NGX_CONF_ERROR; |
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Limit zone: added the "limit_conn_zone" directive.
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changeset
|
617 } |
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Limit zone: added the "limit_conn_zone" directive.
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changeset
|
618 |
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Limit zone: added the "limit_conn_zone" directive.
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|
619 if (size < (ssize_t) (8 * ngx_pagesize)) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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620 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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Limit zone: added the "limit_conn_zone" directive.
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changeset
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621 "zone \"%V\" is too small", &value[i]); |
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Limit zone: added the "limit_conn_zone" directive.
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622 return NGX_CONF_ERROR; |
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Limit zone: added the "limit_conn_zone" directive.
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623 } |
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Limit zone: added the "limit_conn_zone" directive.
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624 |
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Limit zone: added the "limit_conn_zone" directive.
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625 continue; |
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Limit zone: added the "limit_conn_zone" directive.
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626 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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changeset
|
627 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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changeset
|
628 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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Limit zone: added the "limit_conn_zone" directive.
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|
629 "invalid parameter \"%V\"", &value[i]); |
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Limit zone: added the "limit_conn_zone" directive.
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|
630 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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631 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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|
632 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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changeset
|
633 if (name.len == 0) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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|
634 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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Limit zone: added the "limit_conn_zone" directive.
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diff
changeset
|
635 "\"%V\" must have \"zone\" parameter", |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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diff
changeset
|
636 &cmd->name); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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|
637 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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diff
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|
638 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
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diff
changeset
|
639 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
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diff
changeset
|
640 shm_zone = ngx_shared_memory_add(cf, &name, size, |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
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4272
diff
changeset
|
641 &ngx_http_limit_conn_module); |
4272
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Limit zone: added the "limit_conn_zone" directive.
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|
642 if (shm_zone == NULL) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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|
643 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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diff
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|
644 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
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diff
changeset
|
645 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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diff
changeset
|
646 if (shm_zone->data) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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diff
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|
647 ctx = shm_zone->data; |
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Limit zone: added the "limit_conn_zone" directive.
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648 |
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Limit zone: added the "limit_conn_zone" directive.
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changeset
|
649 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
5860
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
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diff
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|
650 "%V \"%V\" is already bound to key \"%V\"", |
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Limit conn: use complex value in limit_conn_zone (ticket #121).
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diff
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|
651 &cmd->name, &name, &ctx->key.value); |
4272
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Limit zone: added the "limit_conn_zone" directive.
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diff
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|
652 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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diff
changeset
|
653 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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diff
changeset
|
654 |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
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parents:
4272
diff
changeset
|
655 shm_zone->init = ngx_http_limit_conn_init_zone; |
4272
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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|
656 shm_zone->data = ctx; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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diff
changeset
|
657 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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diff
changeset
|
658 return NGX_CONF_OK; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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diff
changeset
|
659 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
660 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
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diff
changeset
|
661 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
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changeset
|
662 static char * |
980 | 663 ngx_http_limit_conn(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
664 { | |
4271
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Limit zone: support for multiple "limit_conn" limits.
Valentin Bartenev <vbart@nginx.com>
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diff
changeset
|
665 ngx_shm_zone_t *shm_zone; |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
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diff
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|
666 ngx_http_limit_conn_conf_t *lccf = conf; |
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
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diff
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|
667 ngx_http_limit_conn_limit_t *limit, *limits; |
980 | 668 |
669 ngx_str_t *value; | |
4271
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diff
changeset
|
670 ngx_int_t n; |
b86cceba426a
Limit zone: support for multiple "limit_conn" limits.
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4270
diff
changeset
|
671 ngx_uint_t i; |
2372 | 672 |
980 | 673 value = cf->args->elts; |
674 | |
4271
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Limit zone: support for multiple "limit_conn" limits.
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4270
diff
changeset
|
675 shm_zone = ngx_shared_memory_add(cf, &value[1], 0, |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
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4272
diff
changeset
|
676 &ngx_http_limit_conn_module); |
4271
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Limit zone: support for multiple "limit_conn" limits.
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4270
diff
changeset
|
677 if (shm_zone == NULL) { |
980 | 678 return NGX_CONF_ERROR; |
679 } | |
680 | |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
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4272
diff
changeset
|
681 limits = lccf->limits.elts; |
4271
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Limit zone: support for multiple "limit_conn" limits.
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diff
changeset
|
682 |
b86cceba426a
Limit zone: support for multiple "limit_conn" limits.
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4270
diff
changeset
|
683 if (limits == NULL) { |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
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4272
diff
changeset
|
684 if (ngx_array_init(&lccf->limits, cf->pool, 1, |
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
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4272
diff
changeset
|
685 sizeof(ngx_http_limit_conn_limit_t)) |
4271
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Limit zone: support for multiple "limit_conn" limits.
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diff
changeset
|
686 != NGX_OK) |
b86cceba426a
Limit zone: support for multiple "limit_conn" limits.
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diff
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|
687 { |
b86cceba426a
Limit zone: support for multiple "limit_conn" limits.
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diff
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|
688 return NGX_CONF_ERROR; |
b86cceba426a
Limit zone: support for multiple "limit_conn" limits.
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|
689 } |
b86cceba426a
Limit zone: support for multiple "limit_conn" limits.
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4270
diff
changeset
|
690 } |
b86cceba426a
Limit zone: support for multiple "limit_conn" limits.
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parents:
4270
diff
changeset
|
691 |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
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4272
diff
changeset
|
692 for (i = 0; i < lccf->limits.nelts; i++) { |
4271
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Limit zone: support for multiple "limit_conn" limits.
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diff
changeset
|
693 if (shm_zone == limits[i].shm_zone) { |
b86cceba426a
Limit zone: support for multiple "limit_conn" limits.
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diff
changeset
|
694 return "is duplicate"; |
b86cceba426a
Limit zone: support for multiple "limit_conn" limits.
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|
695 } |
b86cceba426a
Limit zone: support for multiple "limit_conn" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4270
diff
changeset
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696 } |
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Limit zone: support for multiple "limit_conn" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
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changeset
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697 |
987 | 698 n = ngx_atoi(value[2].data, value[2].len); |
699 if (n <= 0) { | |
980 | 700 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
987 | 701 "invalid number of connections \"%V\"", &value[2]); |
980 | 702 return NGX_CONF_ERROR; |
703 } | |
704 | |
1011
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
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changeset
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705 if (n > 65535) { |
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test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
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706 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
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changeset
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707 "connection limit must be less 65536"); |
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
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changeset
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708 return NGX_CONF_ERROR; |
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
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709 } |
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
710 |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
4272
diff
changeset
|
711 limit = ngx_array_push(&lccf->limits); |
4811
21d1e3bcb356
Added three missing checks for NULL after ngx_array_push() calls.
Valentin Bartenev <vbart@nginx.com>
parents:
4756
diff
changeset
|
712 if (limit == NULL) { |
21d1e3bcb356
Added three missing checks for NULL after ngx_array_push() calls.
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parents:
4756
diff
changeset
|
713 return NGX_CONF_ERROR; |
21d1e3bcb356
Added three missing checks for NULL after ngx_array_push() calls.
Valentin Bartenev <vbart@nginx.com>
parents:
4756
diff
changeset
|
714 } |
21d1e3bcb356
Added three missing checks for NULL after ngx_array_push() calls.
Valentin Bartenev <vbart@nginx.com>
parents:
4756
diff
changeset
|
715 |
4271
b86cceba426a
Limit zone: support for multiple "limit_conn" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4270
diff
changeset
|
716 limit->conn = n; |
b86cceba426a
Limit zone: support for multiple "limit_conn" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
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diff
changeset
|
717 limit->shm_zone = shm_zone; |
980 | 718 |
719 return NGX_CONF_OK; | |
720 } | |
721 | |
722 | |
723 static ngx_int_t | |
7595
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
parents:
7594
diff
changeset
|
724 ngx_http_limit_conn_add_variables(ngx_conf_t *cf) |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
parents:
7594
diff
changeset
|
725 { |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
parents:
7594
diff
changeset
|
726 ngx_http_variable_t *var, *v; |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
parents:
7594
diff
changeset
|
727 |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
parents:
7594
diff
changeset
|
728 for (v = ngx_http_limit_conn_vars; v->name.len; v++) { |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
parents:
7594
diff
changeset
|
729 var = ngx_http_add_variable(cf, &v->name, v->flags); |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
parents:
7594
diff
changeset
|
730 if (var == NULL) { |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
parents:
7594
diff
changeset
|
731 return NGX_ERROR; |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
parents:
7594
diff
changeset
|
732 } |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
parents:
7594
diff
changeset
|
733 |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
parents:
7594
diff
changeset
|
734 var->get_handler = v->get_handler; |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
parents:
7594
diff
changeset
|
735 var->data = v->data; |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
parents:
7594
diff
changeset
|
736 } |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
parents:
7594
diff
changeset
|
737 |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
parents:
7594
diff
changeset
|
738 return NGX_OK; |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
parents:
7594
diff
changeset
|
739 } |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
parents:
7594
diff
changeset
|
740 |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
parents:
7594
diff
changeset
|
741 |
9606d93aa586
Limit conn: $limit_conn_status variable.
Roman Arutyunyan <arut@nginx.com>
parents:
7594
diff
changeset
|
742 static ngx_int_t |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
4272
diff
changeset
|
743 ngx_http_limit_conn_init(ngx_conf_t *cf) |
980 | 744 { |
745 ngx_http_handler_pt *h; | |
746 ngx_http_core_main_conf_t *cmcf; | |
747 | |
748 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); | |
749 | |
750 h = ngx_array_push(&cmcf->phases[NGX_HTTP_PREACCESS_PHASE].handlers); | |
751 if (h == NULL) { | |
752 return NGX_ERROR; | |
753 } | |
754 | |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
4272
diff
changeset
|
755 *h = ngx_http_limit_conn_handler; |
980 | 756 |
757 return NGX_OK; | |
758 } |