Mercurial > hg > nginx-quic
view src/os/win32/ngx_dlopen.h @ 7386:9200b41db765 stable-1.14
HTTP/2: limit the number of idle state switches.
An attack that continuously switches HTTP/2 connection between
idle and active states can result in excessive CPU usage.
This is because when a connection switches to the idle state,
all of its memory pool caches are freed.
This change limits the maximum allowed number of idle state
switches to 10 * http2_max_requests (i.e., 10000 by default).
This limits possible CPU usage in one connection, and also
imposes a limit on the maximum lifetime of a connection.
Initially reported by Gal Goldshtein from F5 Networks.
author | Ruslan Ermilov <ru@nginx.com> |
---|---|
date | Tue, 06 Nov 2018 16:29:49 +0300 |
parents | 7142b04337d6 |
children |
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/* * Copyright (C) Maxim Dounin * Copyright (C) Nginx, Inc. */ #ifndef _NGX_DLOPEN_H_INCLUDED_ #define _NGX_DLOPEN_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> #define NGX_HAVE_DLOPEN 1 #define ngx_dlopen(path) LoadLibrary((char *) path) #define ngx_dlopen_n "LoadLibrary()" #define ngx_dlsym(handle, symbol) (void *) GetProcAddress(handle, symbol) #define ngx_dlsym_n "GetProcAddress()" #define ngx_dlclose(handle) (FreeLibrary(handle) ? 0 : -1) #define ngx_dlclose_n "FreeLibrary()" char *ngx_dlerror(void); #endif /* _NGX_DLOPEN_H_INCLUDED_ */