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view src/event/quic/ngx_event_quic_socket.h @ 9143:48691bab4474

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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 c389200e10a2
children
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/*
 * Copyright (C) Nginx, Inc.
 */


#ifndef _NGX_EVENT_QUIC_SOCKET_H_INCLUDED_
#define _NGX_EVENT_QUIC_SOCKET_H_INCLUDED_


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


ngx_int_t ngx_quic_open_sockets(ngx_connection_t *c,
    ngx_quic_connection_t *qc, ngx_quic_header_t *pkt);
void ngx_quic_close_sockets(ngx_connection_t *c);

ngx_quic_socket_t *ngx_quic_create_socket(ngx_connection_t *c,
    ngx_quic_connection_t *qc);
ngx_int_t ngx_quic_listen(ngx_connection_t *c, ngx_quic_connection_t *qc,
    ngx_quic_socket_t *qsock);
void ngx_quic_close_socket(ngx_connection_t *c, ngx_quic_socket_t *qsock);

ngx_quic_socket_t *ngx_quic_find_socket(ngx_connection_t *c, uint64_t seqnum);


#endif /* _NGX_EVENT_QUIC_SOCKET_H_INCLUDED_ */