Mercurial > hg > nginx
view src/event/ngx_event_posted.h @ 9143:48691bab4474
QUIC: fixed probe-congestion deadlock.
When probe timeout expired while congestion window was exhausted, probe PINGs
could not be sent. As a result, lost packets could not be declared lost and
congestion window could not be freed for new packets. This deadlock
continued until connection idle timeout expiration.
Now PINGs are sent separately from the frame queue without congestion control,
as specified by RFC 9002, Section 7:
An endpoint MUST NOT send a packet if it would cause bytes_in_flight
(see Appendix B.2) to be larger than the congestion window, unless the
packet is sent on a PTO timer expiration (see Section 6.2) or when entering
recovery (see Section 7.3.2).
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Mon, 14 Aug 2023 08:28:30 +0400 |
parents | f1720934c45b |
children |
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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); void ngx_event_move_posted_next(ngx_cycle_t *cycle); extern ngx_queue_t ngx_posted_accept_events; extern ngx_queue_t ngx_posted_next_events; extern ngx_queue_t ngx_posted_events; #endif /* _NGX_EVENT_POSTED_H_INCLUDED_ */