Mercurial > hg > nginx
view src/event/quic/ngx_event_quic_tokens.h @ 9138:a90f79792b5d
QUIC: optimized ACK delay.
Previously ACK was not generated if max_ack_delay was not yet expired and the
number of unacknowledged ack-eliciting packets was less than two, as allowed by
RFC 9000 13.2.1-13.2.2. However this only makes sense to avoid sending ACK-only
packets, as explained by the RFC:
On the other hand, reducing the frequency of packets that carry only
acknowledgments reduces packet transmission and processing cost at both
endpoints.
Now ACK is delayed only if output frame queue is empty. Otherwise ACK is sent
immediately, which significantly improves QUIC performance with certain tests.
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Thu, 27 Jul 2023 16:37:17 +0400 |
parents | 77c1418916f7 |
children |
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/* * Copyright (C) Nginx, Inc. */ #ifndef _NGX_EVENT_QUIC_TOKENS_H_INCLUDED_ #define _NGX_EVENT_QUIC_TOKENS_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> #define NGX_QUIC_MAX_TOKEN_SIZE 64 /* SHA-1(addr)=20 + sizeof(time_t) + retry(1) + odcid.len(1) + odcid */ #define NGX_QUIC_AES_256_GCM_IV_LEN 12 #define NGX_QUIC_AES_256_GCM_TAG_LEN 16 #define NGX_QUIC_TOKEN_BUF_SIZE (NGX_QUIC_AES_256_GCM_IV_LEN \ + NGX_QUIC_MAX_TOKEN_SIZE \ + NGX_QUIC_AES_256_GCM_TAG_LEN) ngx_int_t ngx_quic_new_sr_token(ngx_connection_t *c, ngx_str_t *cid, u_char *secret, u_char *token); ngx_int_t ngx_quic_new_token(ngx_log_t *log, struct sockaddr *sockaddr, socklen_t socklen, u_char *key, ngx_str_t *token, ngx_str_t *odcid, time_t expires, ngx_uint_t is_retry); ngx_int_t ngx_quic_validate_token(ngx_connection_t *c, u_char *key, ngx_quic_header_t *pkt); #endif /* _NGX_EVENT_QUIC_TOKENS_H_INCLUDED_ */