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view src/event/ngx_event_posted.h @ 7385:1c6b6163c039 stable-1.14

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HTTP/2: flood detection. Fixed uncontrolled memory growth in case peer is flooding us with some frames (e.g., SETTINGS and PING) and doesn't read data. Fix is to limit the number of allocated control frames.
author Ruslan Ermilov <ru@nginx.com>
date Tue, 06 Nov 2018 16:29:35 +0300
parents 3d4730eada9c
children 9d2ad2fb4423
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/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#ifndef _NGX_EVENT_POSTED_H_INCLUDED_
#define _NGX_EVENT_POSTED_H_INCLUDED_


#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.h>


#define ngx_post_event(ev, q)                                                 \
                                                                              \
    if (!(ev)->posted) {                                                      \
        (ev)->posted = 1;                                                     \
        ngx_queue_insert_tail(q, &(ev)->queue);                               \
                                                                              \
        ngx_log_debug1(NGX_LOG_DEBUG_CORE, (ev)->log, 0, "post event %p", ev);\
                                                                              \
    } else  {                                                                 \
        ngx_log_debug1(NGX_LOG_DEBUG_CORE, (ev)->log, 0,                      \
                       "update posted event %p", ev);                         \
    }


#define ngx_delete_posted_event(ev)                                           \
                                                                              \
    (ev)->posted = 0;                                                         \
    ngx_queue_remove(&(ev)->queue);                                           \
                                                                              \
    ngx_log_debug1(NGX_LOG_DEBUG_CORE, (ev)->log, 0,                          \
                   "delete posted event %p", ev);



void ngx_event_process_posted(ngx_cycle_t *cycle, ngx_queue_t *posted);


extern ngx_queue_t  ngx_posted_accept_events;
extern ngx_queue_t  ngx_posted_events;


#endif /* _NGX_EVENT_POSTED_H_INCLUDED_ */