Mercurial > hg > nginx-quic
annotate src/http/modules/ngx_http_limit_conn_module.c @ 4314:4a07bad0e2c5
Allowed add_header for proxied 206 replies.
It was working for nginx's own 206 replies as they are seen as 200 in the
headers filter module (range filter goes later in the headers filter chain),
but not for proxied replies.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Mon, 28 Nov 2011 10:00:47 +0000 |
parents | 91874133fb27 |
children | 7697412a0921 |
rev | line source |
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980 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4 */ | |
5 | |
6 | |
7 #include <ngx_config.h> | |
8 #include <ngx_core.h> | |
9 #include <ngx_http.h> | |
10 | |
11 | |
12 typedef struct { | |
981 | 13 u_char color; |
14 u_char len; | |
980 | 15 u_short conn; |
16 u_char data[1]; | |
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17 } ngx_http_limit_conn_node_t; |
980 | 18 |
19 | |
20 typedef struct { | |
21 ngx_shm_zone_t *shm_zone; | |
22 ngx_rbtree_node_t *node; | |
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23 } ngx_http_limit_conn_cleanup_t; |
980 | 24 |
25 | |
26 typedef struct { | |
987 | 27 ngx_rbtree_t *rbtree; |
28 ngx_int_t index; | |
29 ngx_str_t var; | |
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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_http_limit_conn_conf_t; |
980 | 43 |
44 | |
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45 static ngx_rbtree_node_t *ngx_http_limit_conn_lookup(ngx_rbtree_t *rbtree, |
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46 ngx_http_variable_value_t *vv, uint32_t hash); |
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47 static void ngx_http_limit_conn_cleanup(void *data); |
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48 static ngx_inline void ngx_http_limit_conn_cleanup_all(ngx_pool_t *pool); |
980 | 49 |
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50 static void *ngx_http_limit_conn_create_conf(ngx_conf_t *cf); |
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51 static char *ngx_http_limit_conn_merge_conf(ngx_conf_t *cf, void *parent, |
980 | 52 void *child); |
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53 static char *ngx_http_limit_conn_zone(ngx_conf_t *cf, ngx_command_t *cmd, |
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54 void *conf); |
980 | 55 static char *ngx_http_limit_zone(ngx_conf_t *cf, ngx_command_t *cmd, |
56 void *conf); | |
57 static char *ngx_http_limit_conn(ngx_conf_t *cf, ngx_command_t *cmd, | |
58 void *conf); | |
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59 static ngx_int_t ngx_http_limit_conn_init(ngx_conf_t *cf); |
980 | 60 |
61 | |
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62 static ngx_conf_deprecated_t ngx_conf_deprecated_limit_zone = { |
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63 ngx_conf_deprecated, "limit_zone", "limit_conn_zone" |
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64 }; |
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65 |
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66 |
3186 | 67 static ngx_conf_enum_t ngx_http_limit_conn_log_levels[] = { |
68 { ngx_string("info"), NGX_LOG_INFO }, | |
69 { ngx_string("notice"), NGX_LOG_NOTICE }, | |
70 { ngx_string("warn"), NGX_LOG_WARN }, | |
71 { ngx_string("error"), NGX_LOG_ERR }, | |
72 { ngx_null_string, 0 } | |
73 }; | |
74 | |
75 | |
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76 static ngx_command_t ngx_http_limit_conn_commands[] = { |
980 | 77 |
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78 { ngx_string("limit_conn_zone"), |
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79 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE2, |
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80 ngx_http_limit_conn_zone, |
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81 0, |
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82 0, |
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83 NULL }, |
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84 |
980 | 85 { ngx_string("limit_zone"), |
987 | 86 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE3, |
980 | 87 ngx_http_limit_zone, |
88 0, | |
89 0, | |
90 NULL }, | |
91 | |
92 { ngx_string("limit_conn"), | |
987 | 93 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2, |
980 | 94 ngx_http_limit_conn, |
95 NGX_HTTP_LOC_CONF_OFFSET, | |
96 0, | |
97 NULL }, | |
98 | |
3186 | 99 { ngx_string("limit_conn_log_level"), |
100 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
101 ngx_conf_set_enum_slot, | |
102 NGX_HTTP_LOC_CONF_OFFSET, | |
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103 offsetof(ngx_http_limit_conn_conf_t, log_level), |
3186 | 104 &ngx_http_limit_conn_log_levels }, |
105 | |
980 | 106 ngx_null_command |
107 }; | |
108 | |
109 | |
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110 static ngx_http_module_t ngx_http_limit_conn_module_ctx = { |
980 | 111 NULL, /* preconfiguration */ |
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112 ngx_http_limit_conn_init, /* postconfiguration */ |
980 | 113 |
114 NULL, /* create main configuration */ | |
115 NULL, /* init main configuration */ | |
116 | |
117 NULL, /* create server configuration */ | |
118 NULL, /* merge server configuration */ | |
119 | |
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120 ngx_http_limit_conn_create_conf, /* create location configration */ |
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121 ngx_http_limit_conn_merge_conf /* merge location configration */ |
980 | 122 }; |
123 | |
124 | |
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125 ngx_module_t ngx_http_limit_conn_module = { |
980 | 126 NGX_MODULE_V1, |
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127 &ngx_http_limit_conn_module_ctx, /* module context */ |
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128 ngx_http_limit_conn_commands, /* module directives */ |
980 | 129 NGX_HTTP_MODULE, /* module type */ |
130 NULL, /* init master */ | |
131 NULL, /* init module */ | |
132 NULL, /* init process */ | |
133 NULL, /* init thread */ | |
134 NULL, /* exit thread */ | |
135 NULL, /* exit process */ | |
136 NULL, /* exit master */ | |
137 NGX_MODULE_V1_PADDING | |
138 }; | |
139 | |
140 | |
141 static ngx_int_t | |
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142 ngx_http_limit_conn_handler(ngx_http_request_t *r) |
980 | 143 { |
144 size_t len, n; | |
145 uint32_t hash; | |
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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; |
150 ngx_http_variable_value_t *vv; | |
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151 ngx_http_limit_conn_ctx_t *ctx; |
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152 ngx_http_limit_conn_node_t *lc; |
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153 ngx_http_limit_conn_conf_t *lccf; |
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154 ngx_http_limit_conn_limit_t *limits; |
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155 ngx_http_limit_conn_cleanup_t *lccln; |
980 | 156 |
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157 if (r->main->limit_conn_set) { |
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158 return NGX_DECLINED; |
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159 } |
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160 |
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161 r->main->limit_conn_set = 1; |
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162 |
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163 lccf = ngx_http_get_module_loc_conf(r, ngx_http_limit_conn_module); |
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164 limits = lccf->limits.elts; |
980 | 165 |
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166 for (i = 0; i < lccf->limits.nelts; i++) { |
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167 ctx = limits[i].shm_zone->data; |
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168 |
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169 vv = ngx_http_get_indexed_variable(r, ctx->index); |
980 | 170 |
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171 if (vv == NULL || vv->not_found) { |
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172 continue; |
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173 } |
980 | 174 |
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175 len = vv->len; |
980 | 176 |
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177 if (len == 0) { |
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178 continue; |
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179 } |
980 | 180 |
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181 if (len > 255) { |
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182 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
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183 "the value of the \"%V\" variable " |
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184 "is more than 255 bytes: \"%v\"", |
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185 &ctx->var, vv); |
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186 continue; |
980 | 187 } |
188 | |
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189 hash = ngx_crc32_short(vv->data, len); |
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190 |
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191 shpool = (ngx_slab_pool_t *) limits[i].shm_zone->shm.addr; |
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192 |
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193 ngx_shmtx_lock(&shpool->mutex); |
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194 |
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195 node = ngx_http_limit_conn_lookup(ctx->rbtree, vv, hash); |
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196 |
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197 if (node == NULL) { |
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198 |
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199 n = offsetof(ngx_rbtree_node_t, color) |
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200 + offsetof(ngx_http_limit_conn_node_t, data) |
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201 + len; |
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202 |
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203 node = ngx_slab_alloc_locked(shpool, n); |
980 | 204 |
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205 if (node == NULL) { |
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206 ngx_shmtx_unlock(&shpool->mutex); |
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207 ngx_http_limit_conn_cleanup_all(r->pool); |
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208 return NGX_HTTP_SERVICE_UNAVAILABLE; |
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209 } |
2373 | 210 |
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211 lc = (ngx_http_limit_conn_node_t *) &node->color; |
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212 |
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213 node->key = hash; |
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214 lc->len = (u_char) len; |
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215 lc->conn = 1; |
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216 ngx_memcpy(lc->data, vv->data, len); |
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217 |
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218 ngx_rbtree_insert(ctx->rbtree, node); |
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219 |
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220 } else { |
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221 |
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222 lc = (ngx_http_limit_conn_node_t *) &node->color; |
980 | 223 |
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224 if ((ngx_uint_t) lc->conn >= limits[i].conn) { |
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225 |
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226 ngx_shmtx_unlock(&shpool->mutex); |
980 | 227 |
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228 ngx_log_error(lccf->log_level, r->connection->log, 0, |
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229 "limiting connections by zone \"%V\"", |
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230 &limits[i].shm_zone->shm.name); |
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231 |
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232 ngx_http_limit_conn_cleanup_all(r->pool); |
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233 return NGX_HTTP_SERVICE_UNAVAILABLE; |
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234 } |
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235 |
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236 lc->conn++; |
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237 } |
980 | 238 |
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239 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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240 "limit zone: %08XD %d", node->key, lc->conn); |
980 | 241 |
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242 ngx_shmtx_unlock(&shpool->mutex); |
980 | 243 |
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244 cln = ngx_pool_cleanup_add(r->pool, |
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245 sizeof(ngx_http_limit_conn_cleanup_t)); |
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246 if (cln == NULL) { |
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247 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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248 } |
980 | 249 |
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250 cln->handler = ngx_http_limit_conn_cleanup; |
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251 lccln = cln->data; |
980 | 252 |
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253 lccln->shm_zone = limits[i].shm_zone; |
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254 lccln->node = node; |
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255 } |
980 | 256 |
257 return NGX_DECLINED; | |
258 } | |
259 | |
260 | |
261 static void | |
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262 ngx_http_limit_conn_rbtree_insert_value(ngx_rbtree_node_t *temp, |
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263 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel) |
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264 { |
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265 ngx_rbtree_node_t **p; |
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266 ngx_http_limit_conn_node_t *lcn, *lcnt; |
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267 |
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268 for ( ;; ) { |
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269 |
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270 if (node->key < temp->key) { |
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271 |
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272 p = &temp->left; |
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273 |
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274 } else if (node->key > temp->key) { |
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275 |
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276 p = &temp->right; |
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277 |
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278 } else { /* node->key == temp->key */ |
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279 |
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280 lcn = (ngx_http_limit_conn_node_t *) &node->color; |
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281 lcnt = (ngx_http_limit_conn_node_t *) &temp->color; |
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282 |
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283 p = (ngx_memn2cmp(lcn->data, lcnt->data, lcn->len, lcnt->len) < 0) |
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284 ? &temp->left : &temp->right; |
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285 } |
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286 |
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287 if (*p == sentinel) { |
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288 break; |
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289 } |
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290 |
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291 temp = *p; |
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292 } |
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293 |
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294 *p = node; |
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295 node->parent = temp; |
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296 node->left = sentinel; |
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297 node->right = sentinel; |
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298 ngx_rbt_red(node); |
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299 } |
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300 |
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301 |
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302 static ngx_rbtree_node_t * |
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303 ngx_http_limit_conn_lookup(ngx_rbtree_t *rbtree, ngx_http_variable_value_t *vv, |
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304 uint32_t hash) |
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305 { |
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306 ngx_int_t rc; |
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307 ngx_rbtree_node_t *node, *sentinel; |
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308 ngx_http_limit_conn_node_t *lcn; |
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309 |
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310 node = rbtree->root; |
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311 sentinel = rbtree->sentinel; |
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312 |
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313 while (node != sentinel) { |
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314 |
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315 if (hash < node->key) { |
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316 node = node->left; |
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317 continue; |
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318 } |
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319 |
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320 if (hash > node->key) { |
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321 node = node->right; |
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322 continue; |
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323 } |
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324 |
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325 /* hash == node->key */ |
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326 |
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327 do { |
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328 lcn = (ngx_http_limit_conn_node_t *) &node->color; |
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329 |
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330 rc = ngx_memn2cmp(vv->data, lcn->data, |
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331 (size_t) vv->len, (size_t) lcn->len); |
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332 if (rc == 0) { |
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333 return node; |
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334 } |
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335 |
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336 node = (rc < 0) ? node->left : node->right; |
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337 |
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338 } while (node != sentinel && hash == node->key); |
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339 |
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340 break; |
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341 } |
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342 |
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343 return NULL; |
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344 } |
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345 |
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346 |
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347 static void |
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348 ngx_http_limit_conn_cleanup(void *data) |
980 | 349 { |
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350 ngx_http_limit_conn_cleanup_t *lccln = data; |
980 | 351 |
352 ngx_slab_pool_t *shpool; | |
353 ngx_rbtree_node_t *node; | |
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354 ngx_http_limit_conn_ctx_t *ctx; |
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355 ngx_http_limit_conn_node_t *lc; |
980 | 356 |
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357 ctx = lccln->shm_zone->data; |
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358 shpool = (ngx_slab_pool_t *) lccln->shm_zone->shm.addr; |
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359 node = lccln->node; |
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360 lc = (ngx_http_limit_conn_node_t *) &node->color; |
980 | 361 |
362 ngx_shmtx_lock(&shpool->mutex); | |
363 | |
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364 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, lccln->shm_zone->shm.log, 0, |
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365 "limit zone cleanup: %08XD %d", node->key, lc->conn); |
980 | 366 |
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367 lc->conn--; |
980 | 368 |
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369 if (lc->conn == 0) { |
987 | 370 ngx_rbtree_delete(ctx->rbtree, node); |
980 | 371 ngx_slab_free_locked(shpool, node); |
372 } | |
373 | |
374 ngx_shmtx_unlock(&shpool->mutex); | |
375 } | |
376 | |
377 | |
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378 static ngx_inline void |
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379 ngx_http_limit_conn_cleanup_all(ngx_pool_t *pool) |
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380 { |
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381 ngx_pool_cleanup_t *cln; |
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382 |
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383 cln = pool->cleanup; |
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384 |
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385 while (cln && cln->handler == ngx_http_limit_conn_cleanup) { |
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386 ngx_http_limit_conn_cleanup(cln->data); |
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387 cln = cln->next; |
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388 } |
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389 |
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390 pool->cleanup = cln; |
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391 } |
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392 |
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393 |
980 | 394 static ngx_int_t |
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395 ngx_http_limit_conn_init_zone(ngx_shm_zone_t *shm_zone, void *data) |
980 | 396 { |
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397 ngx_http_limit_conn_ctx_t *octx = data; |
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398 |
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399 size_t len; |
987 | 400 ngx_slab_pool_t *shpool; |
401 ngx_rbtree_node_t *sentinel; | |
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402 ngx_http_limit_conn_ctx_t *ctx; |
980 | 403 |
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404 ctx = shm_zone->data; |
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405 |
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406 if (octx) { |
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407 if (ngx_strcmp(ctx->var.data, octx->var.data) != 0) { |
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408 ngx_log_error(NGX_LOG_EMERG, shm_zone->shm.log, 0, |
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409 "limit_conn_zone \"%V\" uses the \"%V\" variable " |
993
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410 "while previously it used the \"%V\" variable", |
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411 &shm_zone->shm.name, &ctx->var, &octx->var); |
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412 return NGX_ERROR; |
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413 } |
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414 |
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415 ctx->rbtree = octx->rbtree; |
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416 |
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417 return NGX_OK; |
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418 } |
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419 |
980 | 420 shpool = (ngx_slab_pool_t *) shm_zone->shm.addr; |
421 | |
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422 if (shm_zone->shm.exists) { |
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423 ctx->rbtree = shpool->data; |
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424 |
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425 return NGX_OK; |
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426 } |
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427 |
987 | 428 ctx->rbtree = ngx_slab_alloc(shpool, sizeof(ngx_rbtree_t)); |
429 if (ctx->rbtree == NULL) { | |
980 | 430 return NGX_ERROR; |
431 } | |
432 | |
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433 shpool->data = ctx->rbtree; |
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434 |
980 | 435 sentinel = ngx_slab_alloc(shpool, sizeof(ngx_rbtree_node_t)); |
436 if (sentinel == NULL) { | |
437 return NGX_ERROR; | |
438 } | |
439 | |
1743
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440 ngx_rbtree_init(ctx->rbtree, sentinel, |
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441 ngx_http_limit_conn_rbtree_insert_value); |
980 | 442 |
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Limit zone: added the "limit_conn_zone" directive.
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443 len = sizeof(" in limit_conn_zone \"\"") + shm_zone->shm.name.len; |
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444 |
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445 shpool->log_ctx = ngx_slab_alloc(shpool, len); |
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446 if (shpool->log_ctx == NULL) { |
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447 return NGX_ERROR; |
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448 } |
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449 |
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450 ngx_sprintf(shpool->log_ctx, " in limit_conn_zone \"%V\"%Z", |
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451 &shm_zone->shm.name); |
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452 |
980 | 453 return NGX_OK; |
454 } | |
455 | |
456 | |
457 static void * | |
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458 ngx_http_limit_conn_create_conf(ngx_conf_t *cf) |
980 | 459 { |
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460 ngx_http_limit_conn_conf_t *conf; |
980 | 461 |
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462 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_conn_conf_t)); |
980 | 463 if (conf == NULL) { |
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464 return NULL; |
980 | 465 } |
466 | |
467 /* | |
468 * set by ngx_pcalloc(): | |
469 * | |
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470 * conf->limits.elts = NULL; |
980 | 471 */ |
472 | |
3186 | 473 conf->log_level = NGX_CONF_UNSET_UINT; |
474 | |
980 | 475 return conf; |
476 } | |
477 | |
478 | |
479 static char * | |
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480 ngx_http_limit_conn_merge_conf(ngx_conf_t *cf, void *parent, void *child) |
980 | 481 { |
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482 ngx_http_limit_conn_conf_t *prev = parent; |
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483 ngx_http_limit_conn_conf_t *conf = child; |
980 | 484 |
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Limit zone: support for multiple "limit_conn" limits.
Valentin Bartenev <vbart@nginx.com>
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diff
changeset
|
485 if (conf->limits.elts == NULL) { |
980 | 486 *conf = *prev; |
487 } | |
488 | |
3186 | 489 ngx_conf_merge_uint_value(conf->log_level, prev->log_level, NGX_LOG_ERR); |
490 | |
980 | 491 return NGX_CONF_OK; |
492 } | |
493 | |
494 | |
495 static char * | |
4272
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
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diff
changeset
|
496 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>
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changeset
|
497 { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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diff
changeset
|
498 u_char *p; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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parents:
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diff
changeset
|
499 ssize_t size; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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diff
changeset
|
500 ngx_str_t *value, name, s; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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parents:
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diff
changeset
|
501 ngx_uint_t i; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
502 ngx_shm_zone_t *shm_zone; |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
4272
diff
changeset
|
503 ngx_http_limit_conn_ctx_t *ctx; |
4272
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
504 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
505 value = cf->args->elts; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
506 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
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4271
diff
changeset
|
507 ctx = NULL; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
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4271
diff
changeset
|
508 size = 0; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
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diff
changeset
|
509 name.len = 0; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
510 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
511 for (i = 1; i < cf->args->nelts; i++) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
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4271
diff
changeset
|
512 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
513 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
|
514 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
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diff
changeset
|
515 name.data = value[i].data + 5; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
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4271
diff
changeset
|
516 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
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diff
changeset
|
517 p = (u_char *) ngx_strchr(name.data, ':'); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
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diff
changeset
|
518 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
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diff
changeset
|
519 if (p == NULL) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
520 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
|
521 "invalid zone size \"%V\"", &value[i]); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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diff
changeset
|
522 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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diff
changeset
|
523 } |
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>
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diff
changeset
|
525 name.len = p - name.data; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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4271
diff
changeset
|
526 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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4271
diff
changeset
|
527 s.data = p + 1; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
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diff
changeset
|
528 s.len = value[i].data + value[i].len - s.data; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
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4271
diff
changeset
|
529 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
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4271
diff
changeset
|
530 size = ngx_parse_size(&s); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
531 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
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4271
diff
changeset
|
532 if (size == NGX_ERROR) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
533 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
|
534 "invalid zone size \"%V\"", &value[i]); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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parents:
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diff
changeset
|
535 return NGX_CONF_ERROR; |
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 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
538 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
|
539 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
|
540 "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
|
541 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
542 } |
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>
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4271
diff
changeset
|
544 continue; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
545 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
546 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
547 if (value[i].data[0] == '$') { |
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 value[i].len--; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
550 value[i].data++; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
551 |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
4272
diff
changeset
|
552 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_conn_ctx_t)); |
4272
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
553 if (ctx == NULL) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
554 return NGX_CONF_ERROR; |
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 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
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4271
diff
changeset
|
557 ctx->index = ngx_http_get_variable_index(cf, &value[i]); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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4271
diff
changeset
|
558 if (ctx->index == NGX_ERROR) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
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diff
changeset
|
559 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
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parents:
4271
diff
changeset
|
560 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
561 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
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4271
diff
changeset
|
562 ctx->var = value[i]; |
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 continue; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
565 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
566 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
567 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
|
568 "invalid parameter \"%V\"", &value[i]); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
569 return NGX_CONF_ERROR; |
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 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
572 if (name.len == 0) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
573 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
|
574 "\"%V\" must have \"zone\" parameter", |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
575 &cmd->name); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
576 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
577 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
578 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
579 if (ctx == NULL) { |
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, |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
581 "no variable is defined for %V \"%V\"", |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
582 &cmd->name, &name); |
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 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
586 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
|
587 &ngx_http_limit_conn_module); |
4272
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
588 if (shm_zone == NULL) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
589 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
590 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
591 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
592 if (shm_zone->data) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
593 ctx = shm_zone->data; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
594 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
595 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
|
596 "%V \"%V\" is already bound to variable \"%V\"", |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
597 &cmd->name, &name, &ctx->var); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
598 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
599 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
600 |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
4272
diff
changeset
|
601 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
|
602 shm_zone->data = ctx; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
603 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
604 return NGX_CONF_OK; |
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.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
606 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
607 |
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608 static char * |
980 | 609 ngx_http_limit_zone(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
610 { | |
987 | 611 ssize_t n; |
612 ngx_str_t *value; | |
613 ngx_shm_zone_t *shm_zone; | |
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614 ngx_http_limit_conn_ctx_t *ctx; |
980 | 615 |
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616 ngx_conf_deprecated(cf, &ngx_conf_deprecated_limit_zone, NULL); |
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617 |
980 | 618 value = cf->args->elts; |
619 | |
987 | 620 if (value[2].data[0] != '$') { |
621 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
622 "invalid variable name \"%V\"", &value[2]); | |
623 return NGX_CONF_ERROR; | |
624 } | |
625 | |
626 value[2].len--; | |
627 value[2].data++; | |
628 | |
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629 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_conn_ctx_t)); |
987 | 630 if (ctx == NULL) { |
631 return NGX_CONF_ERROR; | |
632 } | |
633 | |
634 ctx->index = ngx_http_get_variable_index(cf, &value[2]); | |
635 if (ctx->index == NGX_ERROR) { | |
636 return NGX_CONF_ERROR; | |
637 } | |
638 | |
639 ctx->var = value[2]; | |
640 | |
641 n = ngx_parse_size(&value[3]); | |
980 | 642 |
643 if (n == NGX_ERROR) { | |
644 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
987 | 645 "invalid size of limit_zone \"%V\"", &value[3]); |
980 | 646 return NGX_CONF_ERROR; |
647 } | |
648 | |
649 if (n < (ngx_int_t) (8 * ngx_pagesize)) { | |
650 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
651 "limit_zone \"%V\" is too small", &value[1]); | |
652 return NGX_CONF_ERROR; | |
653 } | |
654 | |
655 | |
656 shm_zone = ngx_shared_memory_add(cf, &value[1], n, | |
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657 &ngx_http_limit_conn_module); |
980 | 658 if (shm_zone == NULL) { |
659 return NGX_CONF_ERROR; | |
660 } | |
661 | |
987 | 662 if (shm_zone->data) { |
663 ctx = shm_zone->data; | |
664 | |
665 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
666 "limit_zone \"%V\" is already bound to variable \"%V\"", | |
667 &value[1], &ctx->var); | |
668 return NGX_CONF_ERROR; | |
669 } | |
670 | |
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671 shm_zone->init = ngx_http_limit_conn_init_zone; |
987 | 672 shm_zone->data = ctx; |
980 | 673 |
674 return NGX_CONF_OK; | |
675 } | |
676 | |
677 | |
678 static char * | |
679 ngx_http_limit_conn(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
680 { | |
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681 ngx_shm_zone_t *shm_zone; |
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682 ngx_http_limit_conn_conf_t *lccf = conf; |
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683 ngx_http_limit_conn_limit_t *limit, *limits; |
980 | 684 |
685 ngx_str_t *value; | |
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686 ngx_int_t n; |
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687 ngx_uint_t i; |
2372 | 688 |
980 | 689 value = cf->args->elts; |
690 | |
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691 shm_zone = ngx_shared_memory_add(cf, &value[1], 0, |
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692 &ngx_http_limit_conn_module); |
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693 if (shm_zone == NULL) { |
980 | 694 return NGX_CONF_ERROR; |
695 } | |
696 | |
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697 limits = lccf->limits.elts; |
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698 |
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699 if (limits == NULL) { |
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700 if (ngx_array_init(&lccf->limits, cf->pool, 1, |
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701 sizeof(ngx_http_limit_conn_limit_t)) |
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702 != NGX_OK) |
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703 { |
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704 return NGX_CONF_ERROR; |
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705 } |
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706 } |
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707 |
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708 for (i = 0; i < lccf->limits.nelts; i++) { |
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709 if (shm_zone == limits[i].shm_zone) { |
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710 return "is duplicate"; |
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711 } |
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712 } |
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713 |
987 | 714 n = ngx_atoi(value[2].data, value[2].len); |
715 if (n <= 0) { | |
980 | 716 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
987 | 717 "invalid number of connections \"%V\"", &value[2]); |
980 | 718 return NGX_CONF_ERROR; |
719 } | |
720 | |
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721 if (n > 65535) { |
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722 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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723 "connection limit must be less 65536"); |
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724 return NGX_CONF_ERROR; |
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725 } |
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726 |
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727 limit = ngx_array_push(&lccf->limits); |
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728 limit->conn = n; |
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729 limit->shm_zone = shm_zone; |
980 | 730 |
731 return NGX_CONF_OK; | |
732 } | |
733 | |
734 | |
735 static ngx_int_t | |
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736 ngx_http_limit_conn_init(ngx_conf_t *cf) |
980 | 737 { |
738 ngx_http_handler_pt *h; | |
739 ngx_http_core_main_conf_t *cmcf; | |
740 | |
741 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); | |
742 | |
743 h = ngx_array_push(&cmcf->phases[NGX_HTTP_PREACCESS_PHASE].handlers); | |
744 if (h == NULL) { | |
745 return NGX_ERROR; | |
746 } | |
747 | |
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748 *h = ngx_http_limit_conn_handler; |
980 | 749 |
750 return NGX_OK; | |
751 } |