Mercurial > hg > nginx-quic
view src/os/win32/ngx_process_cycle.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 | b4cc553aafeb |
children |
line wrap: on
line source
/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #ifndef _NGX_PROCESS_CYCLE_H_INCLUDED_ #define _NGX_PROCESS_CYCLE_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> #define NGX_PROCESS_SINGLE 0 #define NGX_PROCESS_MASTER 1 #define NGX_PROCESS_SIGNALLER 2 #define NGX_PROCESS_WORKER 3 void ngx_master_process_cycle(ngx_cycle_t *cycle); void ngx_single_process_cycle(ngx_cycle_t *cycle); void ngx_close_handle(HANDLE h); extern ngx_uint_t ngx_process; extern ngx_uint_t ngx_worker; extern ngx_pid_t ngx_pid; extern ngx_uint_t ngx_exiting; extern sig_atomic_t ngx_quit; extern sig_atomic_t ngx_terminate; extern sig_atomic_t ngx_reopen; extern ngx_uint_t ngx_inherited; extern ngx_pid_t ngx_new_binary; extern HANDLE ngx_master_process_event; extern char ngx_master_process_event_name[]; #endif /* _NGX_PROCESS_CYCLE_H_INCLUDED_ */