Mercurial > hg > nginx
view src/http/v3/ngx_http_v3_encode.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 | 0ac25efb2da3 |
children |
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/* * Copyright (C) Roman Arutyunyan * Copyright (C) Nginx, Inc. */ #ifndef _NGX_HTTP_V3_ENCODE_H_INCLUDED_ #define _NGX_HTTP_V3_ENCODE_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_http.h> uintptr_t ngx_http_v3_encode_varlen_int(u_char *p, uint64_t value); uintptr_t ngx_http_v3_encode_prefix_int(u_char *p, uint64_t value, ngx_uint_t prefix); uintptr_t ngx_http_v3_encode_field_section_prefix(u_char *p, ngx_uint_t insert_count, ngx_uint_t sign, ngx_uint_t delta_base); uintptr_t ngx_http_v3_encode_field_ri(u_char *p, ngx_uint_t dynamic, ngx_uint_t index); uintptr_t ngx_http_v3_encode_field_lri(u_char *p, ngx_uint_t dynamic, ngx_uint_t index, u_char *data, size_t len); uintptr_t ngx_http_v3_encode_field_l(u_char *p, ngx_str_t *name, ngx_str_t *value); uintptr_t ngx_http_v3_encode_field_pbi(u_char *p, ngx_uint_t index); uintptr_t ngx_http_v3_encode_field_lpbi(u_char *p, ngx_uint_t index, u_char *data, size_t len); #endif /* _NGX_HTTP_V3_ENCODE_H_INCLUDED_ */