Mercurial > hg > nginx
view src/event/quic/ngx_event_quic_openssl_compat.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 | bddd3f76e3e5 |
children | daf8f5ba23d8 |
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/* * Copyright (C) Nginx, Inc. */ #ifndef _NGX_EVENT_QUIC_OPENSSL_COMPAT_H_INCLUDED_ #define _NGX_EVENT_QUIC_OPENSSL_COMPAT_H_INCLUDED_ #if defined SSL_R_MISSING_QUIC_TRANSPORT_PARAMETERS_EXTENSION \ || defined LIBRESSL_VERSION_NUMBER #undef NGX_QUIC_OPENSSL_COMPAT #else #include <ngx_config.h> #include <ngx_core.h> typedef struct ngx_quic_compat_s ngx_quic_compat_t; enum ssl_encryption_level_t { ssl_encryption_initial = 0, ssl_encryption_early_data, ssl_encryption_handshake, ssl_encryption_application }; typedef struct ssl_quic_method_st { int (*set_read_secret)(SSL *ssl, enum ssl_encryption_level_t level, const SSL_CIPHER *cipher, const uint8_t *rsecret, size_t secret_len); int (*set_write_secret)(SSL *ssl, enum ssl_encryption_level_t level, const SSL_CIPHER *cipher, const uint8_t *wsecret, size_t secret_len); int (*add_handshake_data)(SSL *ssl, enum ssl_encryption_level_t level, const uint8_t *data, size_t len); int (*flush_flight)(SSL *ssl); int (*send_alert)(SSL *ssl, enum ssl_encryption_level_t level, uint8_t alert); } SSL_QUIC_METHOD; ngx_int_t ngx_quic_compat_init(ngx_conf_t *cf, SSL_CTX *ctx); int SSL_set_quic_method(SSL *ssl, const SSL_QUIC_METHOD *quic_method); int SSL_provide_quic_data(SSL *ssl, enum ssl_encryption_level_t level, const uint8_t *data, size_t len); enum ssl_encryption_level_t SSL_quic_read_level(const SSL *ssl); enum ssl_encryption_level_t SSL_quic_write_level(const SSL *ssl); int SSL_set_quic_transport_params(SSL *ssl, const uint8_t *params, size_t params_len); void SSL_get_peer_quic_transport_params(const SSL *ssl, const uint8_t **out_params, size_t *out_params_len); #endif /* TLSEXT_TYPE_quic_transport_parameters */ #endif /* _NGX_EVENT_QUIC_OPENSSL_COMPAT_H_INCLUDED_ */