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view src/event/quic/ngx_event_quic_output.h @ 9170:c80d111340dc
QUIC: prevented generating ACK frames with discarded keys.
Previously it was possible to generate ACK frames using formally discarded
protection keys, in particular, when acknowledging a client Handshake packet
used to complete the TLS handshake and to discard handshake protection keys.
As it happens late in packet processing, it could be possible to generate ACK
frames after the keys were already discarded.
ACK frames are generated from ngx_quic_ack_packet(), either using a posted
push event, which envolves ngx_quic_generate_ack() as a part of the final
packet assembling, or directly in ngx_quic_ack_packet(), such as when there
is no room to add a new ACK range or when the received packet is out of order.
The added keys availability check is used to avoid generating late ACK frames
in both cases.
author | Sergey Kandaurov <pluknet@nginx.com> |
---|---|
date | Fri, 20 Oct 2023 18:05:07 +0400 |
parents | 58afcd72446f |
children | fcec773dd249 |
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/* * Copyright (C) Nginx, Inc. */ #ifndef _NGX_EVENT_QUIC_OUTPUT_H_INCLUDED_ #define _NGX_EVENT_QUIC_OUTPUT_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> ngx_int_t ngx_quic_output(ngx_connection_t *c); ngx_int_t ngx_quic_negotiate_version(ngx_connection_t *c, ngx_quic_header_t *inpkt); ngx_int_t ngx_quic_send_stateless_reset(ngx_connection_t *c, ngx_quic_conf_t *conf, ngx_quic_header_t *pkt); ngx_int_t ngx_quic_send_cc(ngx_connection_t *c); ngx_int_t ngx_quic_send_early_cc(ngx_connection_t *c, ngx_quic_header_t *inpkt, ngx_uint_t err, const char *reason); ngx_int_t ngx_quic_send_retry(ngx_connection_t *c, ngx_quic_conf_t *conf, ngx_quic_header_t *pkt); ngx_int_t ngx_quic_send_new_token(ngx_connection_t *c, ngx_quic_path_t *path); ngx_int_t ngx_quic_send_ack(ngx_connection_t *c, ngx_quic_send_ctx_t *ctx); ngx_int_t ngx_quic_send_ack_range(ngx_connection_t *c, ngx_quic_send_ctx_t *ctx, uint64_t smallest, uint64_t largest); ngx_int_t ngx_quic_frame_sendto(ngx_connection_t *c, ngx_quic_frame_t *frame, size_t min, ngx_quic_path_t *path); #endif /* _NGX_EVENT_QUIC_OUTPUT_H_INCLUDED_ */