Mercurial > hg > nginx
view src/event/quic/ngx_event_quic_openssl_compat.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 | 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_ */