Mercurial > hg > nginx
annotate src/http/modules/ngx_http_limit_conn_module.c @ 5860:c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
One intentional side effect of this change is that key is allowed only
in the first position. Previously, it was possible to specify the key
variable at any position, but that was never documented, and is contrary
to nginx configuration practice for positional parameters.
author | Valentin Bartenev <vbart@nginx.com> |
---|---|
date | Wed, 24 Sep 2014 21:55:19 +0400 |
parents | ad9116427acf |
children | 1e6bf87a7289 |
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 | |
13 typedef struct { | |
981 | 14 u_char color; |
15 u_char len; | |
980 | 16 u_short conn; |
17 u_char data[1]; | |
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18 } ngx_http_limit_conn_node_t; |
980 | 19 |
20 | |
21 typedef struct { | |
22 ngx_shm_zone_t *shm_zone; | |
23 ngx_rbtree_node_t *node; | |
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24 } ngx_http_limit_conn_cleanup_t; |
980 | 25 |
26 | |
27 typedef struct { | |
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parents:
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28 ngx_rbtree_t *rbtree; |
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29 ngx_http_complex_value_t key; |
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30 } ngx_http_limit_conn_ctx_t; |
987 | 31 |
32 | |
33 typedef struct { | |
980 | 34 ngx_shm_zone_t *shm_zone; |
35 ngx_uint_t conn; | |
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36 } ngx_http_limit_conn_limit_t; |
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37 |
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38 |
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39 typedef struct { |
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40 ngx_array_t limits; |
3186 | 41 ngx_uint_t log_level; |
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42 ngx_uint_t status_code; |
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43 } ngx_http_limit_conn_conf_t; |
980 | 44 |
45 | |
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46 static ngx_rbtree_node_t *ngx_http_limit_conn_lookup(ngx_rbtree_t *rbtree, |
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47 ngx_str_t *key, uint32_t hash); |
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48 static void ngx_http_limit_conn_cleanup(void *data); |
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49 static ngx_inline void ngx_http_limit_conn_cleanup_all(ngx_pool_t *pool); |
980 | 50 |
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51 static void *ngx_http_limit_conn_create_conf(ngx_conf_t *cf); |
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52 static char *ngx_http_limit_conn_merge_conf(ngx_conf_t *cf, void *parent, |
980 | 53 void *child); |
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54 static char *ngx_http_limit_conn_zone(ngx_conf_t *cf, ngx_command_t *cmd, |
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55 void *conf); |
980 | 56 static char *ngx_http_limit_conn(ngx_conf_t *cf, ngx_command_t *cmd, |
57 void *conf); | |
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58 static ngx_int_t ngx_http_limit_conn_init(ngx_conf_t *cf); |
980 | 59 |
60 | |
3186 | 61 static ngx_conf_enum_t ngx_http_limit_conn_log_levels[] = { |
62 { ngx_string("info"), NGX_LOG_INFO }, | |
63 { ngx_string("notice"), NGX_LOG_NOTICE }, | |
64 { ngx_string("warn"), NGX_LOG_WARN }, | |
65 { ngx_string("error"), NGX_LOG_ERR }, | |
66 { ngx_null_string, 0 } | |
67 }; | |
68 | |
69 | |
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70 static ngx_conf_num_bounds_t ngx_http_limit_conn_status_bounds = { |
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71 ngx_conf_check_num_bounds, 400, 599 |
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72 }; |
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73 |
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74 |
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75 static ngx_command_t ngx_http_limit_conn_commands[] = { |
980 | 76 |
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77 { ngx_string("limit_conn_zone"), |
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78 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE2, |
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79 ngx_http_limit_conn_zone, |
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80 0, |
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81 0, |
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82 NULL }, |
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83 |
980 | 84 { ngx_string("limit_conn"), |
987 | 85 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2, |
980 | 86 ngx_http_limit_conn, |
87 NGX_HTTP_LOC_CONF_OFFSET, | |
88 0, | |
89 NULL }, | |
90 | |
3186 | 91 { ngx_string("limit_conn_log_level"), |
92 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
93 ngx_conf_set_enum_slot, | |
94 NGX_HTTP_LOC_CONF_OFFSET, | |
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95 offsetof(ngx_http_limit_conn_conf_t, log_level), |
3186 | 96 &ngx_http_limit_conn_log_levels }, |
97 | |
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98 { ngx_string("limit_conn_status"), |
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99 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, |
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100 ngx_conf_set_num_slot, |
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101 NGX_HTTP_LOC_CONF_OFFSET, |
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102 offsetof(ngx_http_limit_conn_conf_t, status_code), |
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103 &ngx_http_limit_conn_status_bounds }, |
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104 |
980 | 105 ngx_null_command |
106 }; | |
107 | |
108 | |
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109 static ngx_http_module_t ngx_http_limit_conn_module_ctx = { |
980 | 110 NULL, /* preconfiguration */ |
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111 ngx_http_limit_conn_init, /* postconfiguration */ |
980 | 112 |
113 NULL, /* create main configuration */ | |
114 NULL, /* init main configuration */ | |
115 | |
116 NULL, /* create server configuration */ | |
117 NULL, /* merge server configuration */ | |
118 | |
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119 ngx_http_limit_conn_create_conf, /* create location configuration */ |
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120 ngx_http_limit_conn_merge_conf /* merge location configuration */ |
980 | 121 }; |
122 | |
123 | |
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124 ngx_module_t ngx_http_limit_conn_module = { |
980 | 125 NGX_MODULE_V1, |
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126 &ngx_http_limit_conn_module_ctx, /* module context */ |
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127 ngx_http_limit_conn_commands, /* module directives */ |
980 | 128 NGX_HTTP_MODULE, /* module type */ |
129 NULL, /* init master */ | |
130 NULL, /* init module */ | |
131 NULL, /* init process */ | |
132 NULL, /* init thread */ | |
133 NULL, /* exit thread */ | |
134 NULL, /* exit process */ | |
135 NULL, /* exit master */ | |
136 NGX_MODULE_V1_PADDING | |
137 }; | |
138 | |
139 | |
140 static ngx_int_t | |
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141 ngx_http_limit_conn_handler(ngx_http_request_t *r) |
980 | 142 { |
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143 size_t n; |
980 | 144 uint32_t hash; |
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145 ngx_str_t key; |
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146 ngx_uint_t i; |
980 | 147 ngx_slab_pool_t *shpool; |
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148 ngx_rbtree_node_t *node; |
980 | 149 ngx_pool_cleanup_t *cln; |
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150 ngx_http_limit_conn_ctx_t *ctx; |
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151 ngx_http_limit_conn_node_t *lc; |
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152 ngx_http_limit_conn_conf_t *lccf; |
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153 ngx_http_limit_conn_limit_t *limits; |
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154 ngx_http_limit_conn_cleanup_t *lccln; |
980 | 155 |
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156 if (r->main->limit_conn_set) { |
984
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157 return NGX_DECLINED; |
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158 } |
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159 |
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160 lccf = ngx_http_get_module_loc_conf(r, ngx_http_limit_conn_module); |
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161 limits = lccf->limits.elts; |
980 | 162 |
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163 for (i = 0; i < lccf->limits.nelts; i++) { |
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164 ctx = limits[i].shm_zone->data; |
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165 |
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166 if (ngx_http_complex_value(r, &ctx->key, &key) != NGX_OK) { |
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167 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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168 } |
980 | 169 |
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170 if (key.len == 0) { |
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171 continue; |
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172 } |
980 | 173 |
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174 if (key.len > 255) { |
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175 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
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176 "the value of the \"%V\" key " |
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177 "is more than 255 bytes: \"%V\"", |
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178 &ctx->key.value, &key); |
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179 continue; |
980 | 180 } |
181 | |
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182 r->main->limit_conn_set = 1; |
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183 |
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184 hash = ngx_crc32_short(key.data, key.len); |
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185 |
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186 shpool = (ngx_slab_pool_t *) limits[i].shm_zone->shm.addr; |
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187 |
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188 ngx_shmtx_lock(&shpool->mutex); |
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189 |
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190 node = ngx_http_limit_conn_lookup(ctx->rbtree, &key, hash); |
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191 |
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192 if (node == NULL) { |
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193 |
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194 n = offsetof(ngx_rbtree_node_t, color) |
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195 + offsetof(ngx_http_limit_conn_node_t, data) |
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196 + key.len; |
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197 |
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198 node = ngx_slab_alloc_locked(shpool, n); |
980 | 199 |
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200 if (node == NULL) { |
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201 ngx_shmtx_unlock(&shpool->mutex); |
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202 ngx_http_limit_conn_cleanup_all(r->pool); |
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203 return lccf->status_code; |
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204 } |
2373 | 205 |
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206 lc = (ngx_http_limit_conn_node_t *) &node->color; |
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207 |
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208 node->key = hash; |
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209 lc->len = (u_char) key.len; |
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210 lc->conn = 1; |
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211 ngx_memcpy(lc->data, key.data, key.len); |
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212 |
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213 ngx_rbtree_insert(ctx->rbtree, node); |
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214 |
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215 } else { |
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216 |
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217 lc = (ngx_http_limit_conn_node_t *) &node->color; |
980 | 218 |
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219 if ((ngx_uint_t) lc->conn >= limits[i].conn) { |
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220 |
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221 ngx_shmtx_unlock(&shpool->mutex); |
980 | 222 |
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223 ngx_log_error(lccf->log_level, r->connection->log, 0, |
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224 "limiting connections by zone \"%V\"", |
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225 &limits[i].shm_zone->shm.name); |
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226 |
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227 ngx_http_limit_conn_cleanup_all(r->pool); |
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228 return lccf->status_code; |
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229 } |
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230 |
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231 lc->conn++; |
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232 } |
980 | 233 |
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234 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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235 "limit conn: %08XD %d", node->key, lc->conn); |
980 | 236 |
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237 ngx_shmtx_unlock(&shpool->mutex); |
980 | 238 |
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239 cln = ngx_pool_cleanup_add(r->pool, |
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240 sizeof(ngx_http_limit_conn_cleanup_t)); |
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241 if (cln == NULL) { |
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242 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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243 } |
980 | 244 |
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245 cln->handler = ngx_http_limit_conn_cleanup; |
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246 lccln = cln->data; |
980 | 247 |
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248 lccln->shm_zone = limits[i].shm_zone; |
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249 lccln->node = node; |
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250 } |
980 | 251 |
252 return NGX_DECLINED; | |
253 } | |
254 | |
255 | |
256 static void | |
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257 ngx_http_limit_conn_rbtree_insert_value(ngx_rbtree_node_t *temp, |
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258 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel) |
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259 { |
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260 ngx_rbtree_node_t **p; |
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261 ngx_http_limit_conn_node_t *lcn, *lcnt; |
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262 |
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263 for ( ;; ) { |
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264 |
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265 if (node->key < temp->key) { |
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266 |
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267 p = &temp->left; |
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268 |
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269 } else if (node->key > temp->key) { |
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270 |
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271 p = &temp->right; |
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272 |
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273 } else { /* node->key == temp->key */ |
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274 |
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275 lcn = (ngx_http_limit_conn_node_t *) &node->color; |
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276 lcnt = (ngx_http_limit_conn_node_t *) &temp->color; |
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277 |
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278 p = (ngx_memn2cmp(lcn->data, lcnt->data, lcn->len, lcnt->len) < 0) |
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279 ? &temp->left : &temp->right; |
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280 } |
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281 |
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282 if (*p == sentinel) { |
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283 break; |
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284 } |
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285 |
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286 temp = *p; |
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287 } |
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288 |
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289 *p = node; |
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290 node->parent = temp; |
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291 node->left = sentinel; |
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292 node->right = sentinel; |
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293 ngx_rbt_red(node); |
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294 } |
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295 |
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296 |
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297 static ngx_rbtree_node_t * |
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298 ngx_http_limit_conn_lookup(ngx_rbtree_t *rbtree, ngx_str_t *key, uint32_t hash) |
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299 { |
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300 ngx_int_t rc; |
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301 ngx_rbtree_node_t *node, *sentinel; |
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302 ngx_http_limit_conn_node_t *lcn; |
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303 |
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304 node = rbtree->root; |
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305 sentinel = rbtree->sentinel; |
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306 |
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307 while (node != sentinel) { |
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308 |
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309 if (hash < node->key) { |
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310 node = node->left; |
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311 continue; |
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312 } |
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313 |
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314 if (hash > node->key) { |
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315 node = node->right; |
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316 continue; |
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317 } |
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318 |
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319 /* hash == node->key */ |
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320 |
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321 lcn = (ngx_http_limit_conn_node_t *) &node->color; |
4270
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322 |
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323 rc = ngx_memn2cmp(key->data, lcn->data, key->len, (size_t) lcn->len); |
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324 |
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325 if (rc == 0) { |
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Fix of rbtree lookup on hash collisions.
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326 return node; |
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Fix of rbtree lookup on hash collisions.
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327 } |
4270
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328 |
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329 node = (rc < 0) ? node->left : node->right; |
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330 } |
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331 |
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332 return NULL; |
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333 } |
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334 |
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335 |
1026
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Igor Sysoev <igor@sysoev.ru>
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diff
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336 static void |
4280
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337 ngx_http_limit_conn_cleanup(void *data) |
980 | 338 { |
4280
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339 ngx_http_limit_conn_cleanup_t *lccln = data; |
980 | 340 |
341 ngx_slab_pool_t *shpool; | |
342 ngx_rbtree_node_t *node; | |
4280
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343 ngx_http_limit_conn_ctx_t *ctx; |
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344 ngx_http_limit_conn_node_t *lc; |
980 | 345 |
4280
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346 ctx = lccln->shm_zone->data; |
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347 shpool = (ngx_slab_pool_t *) lccln->shm_zone->shm.addr; |
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348 node = lccln->node; |
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349 lc = (ngx_http_limit_conn_node_t *) &node->color; |
980 | 350 |
351 ngx_shmtx_lock(&shpool->mutex); | |
352 | |
4280
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353 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, lccln->shm_zone->shm.log, 0, |
4756
daa60662b7b5
Fixed debugging messages to account that limit_zone was renamed to limit_conn.
Ruslan Ermilov <ru@nginx.com>
parents:
4499
diff
changeset
|
354 "limit conn cleanup: %08XD %d", node->key, lc->conn); |
980 | 355 |
4280
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356 lc->conn--; |
980 | 357 |
4280
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|
358 if (lc->conn == 0) { |
987 | 359 ngx_rbtree_delete(ctx->rbtree, node); |
980 | 360 ngx_slab_free_locked(shpool, node); |
361 } | |
362 | |
363 ngx_shmtx_unlock(&shpool->mutex); | |
364 } | |
365 | |
366 | |
4271
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367 static ngx_inline void |
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|
368 ngx_http_limit_conn_cleanup_all(ngx_pool_t *pool) |
4271
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369 { |
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370 ngx_pool_cleanup_t *cln; |
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371 |
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372 cln = pool->cleanup; |
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373 |
4280
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374 while (cln && cln->handler == ngx_http_limit_conn_cleanup) { |
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375 ngx_http_limit_conn_cleanup(cln->data); |
4271
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376 cln = cln->next; |
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|
377 } |
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diff
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|
378 |
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changeset
|
379 pool->cleanup = cln; |
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Limit zone: support for multiple "limit_conn" limits.
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|
380 } |
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|
381 |
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Limit zone: support for multiple "limit_conn" limits.
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382 |
980 | 383 static ngx_int_t |
4280
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parents:
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diff
changeset
|
384 ngx_http_limit_conn_init_zone(ngx_shm_zone_t *shm_zone, void *data) |
980 | 385 { |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
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diff
changeset
|
386 ngx_http_limit_conn_ctx_t *octx = data; |
993
1b9a4d92173f
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987
diff
changeset
|
387 |
2611
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parents:
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diff
changeset
|
388 size_t len; |
987 | 389 ngx_slab_pool_t *shpool; |
390 ngx_rbtree_node_t *sentinel; | |
4280
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Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
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4272
diff
changeset
|
391 ngx_http_limit_conn_ctx_t *ctx; |
980 | 392 |
993
1b9a4d92173f
pass the inherited shm_zone data
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parents:
987
diff
changeset
|
393 ctx = shm_zone->data; |
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diff
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|
394 |
1b9a4d92173f
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987
diff
changeset
|
395 if (octx) { |
5860
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Limit conn: use complex value in limit_conn_zone (ticket #121).
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diff
changeset
|
396 if (ctx->key.value.len != octx->key.value.len |
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Limit conn: use complex value in limit_conn_zone (ticket #121).
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diff
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|
397 || ngx_strncmp(ctx->key.value.data, octx->key.value.data, |
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Limit conn: use complex value in limit_conn_zone (ticket #121).
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diff
changeset
|
398 ctx->key.value.len) |
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Limit conn: use complex value in limit_conn_zone (ticket #121).
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diff
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|
399 != 0) |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
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diff
changeset
|
400 { |
993
1b9a4d92173f
pass the inherited shm_zone data
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987
diff
changeset
|
401 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>
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diff
changeset
|
402 "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
|
403 "while previously it used the \"%V\" key", |
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Limit conn: use complex value in limit_conn_zone (ticket #121).
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parents:
5859
diff
changeset
|
404 &shm_zone->shm.name, &ctx->key.value, |
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Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
405 &octx->key.value); |
993
1b9a4d92173f
pass the inherited shm_zone data
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diff
changeset
|
406 return NGX_ERROR; |
1b9a4d92173f
pass the inherited shm_zone data
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987
diff
changeset
|
407 } |
1b9a4d92173f
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987
diff
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|
408 |
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
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987
diff
changeset
|
409 ctx->rbtree = octx->rbtree; |
1b9a4d92173f
pass the inherited shm_zone data
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diff
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|
410 |
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
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987
diff
changeset
|
411 return NGX_OK; |
1b9a4d92173f
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987
diff
changeset
|
412 } |
1b9a4d92173f
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987
diff
changeset
|
413 |
980 | 414 shpool = (ngx_slab_pool_t *) shm_zone->shm.addr; |
415 | |
2720
b3b8c66bd520
support attaching to an existent Win32 shared memory
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2716
diff
changeset
|
416 if (shm_zone->shm.exists) { |
b3b8c66bd520
support attaching to an existent Win32 shared memory
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2716
diff
changeset
|
417 ctx->rbtree = shpool->data; |
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support attaching to an existent Win32 shared memory
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diff
changeset
|
418 |
b3b8c66bd520
support attaching to an existent Win32 shared memory
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diff
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|
419 return NGX_OK; |
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support attaching to an existent Win32 shared memory
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2716
diff
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|
420 } |
b3b8c66bd520
support attaching to an existent Win32 shared memory
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parents:
2716
diff
changeset
|
421 |
987 | 422 ctx->rbtree = ngx_slab_alloc(shpool, sizeof(ngx_rbtree_t)); |
423 if (ctx->rbtree == NULL) { | |
980 | 424 return NGX_ERROR; |
425 } | |
426 | |
2720
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support attaching to an existent Win32 shared memory
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diff
changeset
|
427 shpool->data = ctx->rbtree; |
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support attaching to an existent Win32 shared memory
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2716
diff
changeset
|
428 |
980 | 429 sentinel = ngx_slab_alloc(shpool, sizeof(ngx_rbtree_node_t)); |
430 if (sentinel == NULL) { | |
431 return NGX_ERROR; | |
432 } | |
433 | |
1743
4fc402c3ec73
optimize rbtree initialization and insert
Igor Sysoev <igor@sysoev.ru>
parents:
1406
diff
changeset
|
434 ngx_rbtree_init(ctx->rbtree, sentinel, |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
4272
diff
changeset
|
435 ngx_http_limit_conn_rbtree_insert_value); |
980 | 436 |
4272
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
437 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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changeset
|
438 |
2bce3f6416c6
improve ngx_slab_alloc() error logging
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diff
changeset
|
439 shpool->log_ctx = ngx_slab_alloc(shpool, len); |
2bce3f6416c6
improve ngx_slab_alloc() error logging
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2373
diff
changeset
|
440 if (shpool->log_ctx == NULL) { |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
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2373
diff
changeset
|
441 return NGX_ERROR; |
2bce3f6416c6
improve ngx_slab_alloc() error logging
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|
442 } |
2bce3f6416c6
improve ngx_slab_alloc() error logging
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diff
changeset
|
443 |
4272
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
444 ngx_sprintf(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
|
445 &shm_zone->shm.name); |
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improve ngx_slab_alloc() error logging
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diff
changeset
|
446 |
980 | 447 return NGX_OK; |
448 } | |
449 | |
450 | |
451 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
|
452 ngx_http_limit_conn_create_conf(ngx_conf_t *cf) |
980 | 453 { |
4280
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Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
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parents:
4272
diff
changeset
|
454 ngx_http_limit_conn_conf_t *conf; |
980 | 455 |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
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4272
diff
changeset
|
456 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_conn_conf_t)); |
980 | 457 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
|
458 return NULL; |
980 | 459 } |
460 | |
461 /* | |
462 * set by ngx_pcalloc(): | |
463 * | |
4271
b86cceba426a
Limit zone: support for multiple "limit_conn" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4270
diff
changeset
|
464 * conf->limits.elts = NULL; |
980 | 465 */ |
466 | |
3186 | 467 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
|
468 conf->status_code = NGX_CONF_UNSET_UINT; |
3186 | 469 |
980 | 470 return conf; |
471 } | |
472 | |
473 | |
474 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
|
475 ngx_http_limit_conn_merge_conf(ngx_conf_t *cf, void *parent, void *child) |
980 | 476 { |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
4272
diff
changeset
|
477 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
|
478 ngx_http_limit_conn_conf_t *conf = child; |
980 | 479 |
4271
b86cceba426a
Limit zone: support for multiple "limit_conn" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4270
diff
changeset
|
480 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
|
481 conf->limits = prev->limits; |
980 | 482 } |
483 | |
3186 | 484 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
|
485 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
|
486 NGX_HTTP_SERVICE_UNAVAILABLE); |
3186 | 487 |
980 | 488 return NGX_CONF_OK; |
489 } | |
490 | |
491 | |
492 static char * | |
4272
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
493 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
|
494 { |
5860
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
495 u_char *p; |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
496 ssize_t size; |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
497 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
|
498 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
|
499 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
|
500 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
|
501 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
|
502 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
503 value = cf->args->elts; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
504 |
5860
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
505 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
|
506 if (ctx == NULL) { |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
507 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
|
508 } |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
509 |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
510 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
|
511 |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
512 ccv.cf = cf; |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
513 ccv.value = &value[1]; |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
514 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
|
515 |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
516 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:
5859
diff
changeset
|
517 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
|
518 } |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
519 |
4272
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
520 size = 0; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
521 name.len = 0; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
522 |
5860
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
523 for (i = 2; i < cf->args->nelts; i++) { |
4272
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
524 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
525 if (ngx_strncmp(value[i].data, "zone=", 5) == 0) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
526 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
527 name.data = value[i].data + 5; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
528 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
529 p = (u_char *) ngx_strchr(name.data, ':'); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
530 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
531 if (p == NULL) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
532 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
533 "invalid zone size \"%V\"", &value[i]); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
534 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
535 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
536 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
537 name.len = p - name.data; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
538 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
539 s.data = p + 1; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
540 s.len = value[i].data + value[i].len - s.data; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
541 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
542 size = ngx_parse_size(&s); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
543 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
544 if (size == NGX_ERROR) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
545 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
546 "invalid zone size \"%V\"", &value[i]); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
547 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
548 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
549 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
550 if (size < (ssize_t) (8 * ngx_pagesize)) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
551 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
552 "zone \"%V\" is too small", &value[i]); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
553 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
554 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
555 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
556 continue; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
557 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
558 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
559 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
560 "invalid parameter \"%V\"", &value[i]); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
561 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
562 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
563 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
564 if (name.len == 0) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
565 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
566 "\"%V\" must have \"zone\" parameter", |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
567 &cmd->name); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
568 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
569 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
570 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
571 shm_zone = ngx_shared_memory_add(cf, &name, size, |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
4272
diff
changeset
|
572 &ngx_http_limit_conn_module); |
4272
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
573 if (shm_zone == NULL) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
574 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
575 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
576 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
577 if (shm_zone->data) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
578 ctx = shm_zone->data; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
579 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
580 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
5860
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
581 "%V \"%V\" is already bound to key \"%V\"", |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
582 &cmd->name, &name, &ctx->key.value); |
4272
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
583 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
584 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
585 |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
4272
diff
changeset
|
586 shm_zone->init = ngx_http_limit_conn_init_zone; |
4272
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
587 shm_zone->data = ctx; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
588 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
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589 return NGX_CONF_OK; |
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590 } |
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591 |
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592 |
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593 static char * |
980 | 594 ngx_http_limit_conn(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
595 { | |
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596 ngx_shm_zone_t *shm_zone; |
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597 ngx_http_limit_conn_conf_t *lccf = conf; |
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598 ngx_http_limit_conn_limit_t *limit, *limits; |
980 | 599 |
600 ngx_str_t *value; | |
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601 ngx_int_t n; |
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602 ngx_uint_t i; |
2372 | 603 |
980 | 604 value = cf->args->elts; |
605 | |
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606 shm_zone = ngx_shared_memory_add(cf, &value[1], 0, |
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607 &ngx_http_limit_conn_module); |
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608 if (shm_zone == NULL) { |
980 | 609 return NGX_CONF_ERROR; |
610 } | |
611 | |
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612 limits = lccf->limits.elts; |
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613 |
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614 if (limits == NULL) { |
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615 if (ngx_array_init(&lccf->limits, cf->pool, 1, |
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616 sizeof(ngx_http_limit_conn_limit_t)) |
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617 != NGX_OK) |
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618 { |
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619 return NGX_CONF_ERROR; |
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620 } |
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621 } |
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622 |
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623 for (i = 0; i < lccf->limits.nelts; i++) { |
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624 if (shm_zone == limits[i].shm_zone) { |
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625 return "is duplicate"; |
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626 } |
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627 } |
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628 |
987 | 629 n = ngx_atoi(value[2].data, value[2].len); |
630 if (n <= 0) { | |
980 | 631 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
987 | 632 "invalid number of connections \"%V\"", &value[2]); |
980 | 633 return NGX_CONF_ERROR; |
634 } | |
635 | |
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636 if (n > 65535) { |
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637 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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638 "connection limit must be less 65536"); |
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639 return NGX_CONF_ERROR; |
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640 } |
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641 |
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642 limit = ngx_array_push(&lccf->limits); |
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643 if (limit == NULL) { |
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644 return NGX_CONF_ERROR; |
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645 } |
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646 |
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647 limit->conn = n; |
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648 limit->shm_zone = shm_zone; |
980 | 649 |
650 return NGX_CONF_OK; | |
651 } | |
652 | |
653 | |
654 static ngx_int_t | |
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655 ngx_http_limit_conn_init(ngx_conf_t *cf) |
980 | 656 { |
657 ngx_http_handler_pt *h; | |
658 ngx_http_core_main_conf_t *cmcf; | |
659 | |
660 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); | |
661 | |
662 h = ngx_array_push(&cmcf->phases[NGX_HTTP_PREACCESS_PHASE].handlers); | |
663 if (h == NULL) { | |
664 return NGX_ERROR; | |
665 } | |
666 | |
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667 *h = ngx_http_limit_conn_handler; |
980 | 668 |
669 return NGX_OK; | |
670 } |