Mercurial > hg > nginx
view src/event/quic/ngx_event_quic_connid.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 | 1e2f4e9c8195 |
| children |
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/* * Copyright (C) Nginx, Inc. */ #ifndef _NGX_EVENT_QUIC_CONNID_H_INCLUDED_ #define _NGX_EVENT_QUIC_CONNID_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> ngx_int_t ngx_quic_handle_retire_connection_id_frame(ngx_connection_t *c, ngx_quic_retire_cid_frame_t *f); ngx_int_t ngx_quic_handle_new_connection_id_frame(ngx_connection_t *c, ngx_quic_new_conn_id_frame_t *f); ngx_int_t ngx_quic_create_sockets(ngx_connection_t *c); ngx_int_t ngx_quic_create_server_id(ngx_connection_t *c, u_char *id); ngx_quic_client_id_t *ngx_quic_create_client_id(ngx_connection_t *c, ngx_str_t *id, uint64_t seqnum, u_char *token); ngx_quic_client_id_t *ngx_quic_next_client_id(ngx_connection_t *c); ngx_int_t ngx_quic_free_client_id(ngx_connection_t *c, ngx_quic_client_id_t *cid); #endif /* _NGX_EVENT_QUIC_CONNID_H_INCLUDED_ */