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view src/event/quic/ngx_event_quic_frames.h @ 9170:c80d111340dc

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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 3c98fa8fef6f
children
line wrap: on
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/*
 * Copyright (C) Nginx, Inc.
 */


#ifndef _NGX_EVENT_QUIC_FRAMES_H_INCLUDED_
#define _NGX_EVENT_QUIC_FRAMES_H_INCLUDED_


#include <ngx_config.h>
#include <ngx_core.h>


typedef ngx_int_t (*ngx_quic_frame_handler_pt)(ngx_connection_t *c,
    ngx_quic_frame_t *frame, void *data);


ngx_quic_frame_t *ngx_quic_alloc_frame(ngx_connection_t *c);
void ngx_quic_free_frame(ngx_connection_t *c, ngx_quic_frame_t *frame);
void ngx_quic_free_frames(ngx_connection_t *c, ngx_queue_t *frames);
void ngx_quic_queue_frame(ngx_quic_connection_t *qc, ngx_quic_frame_t *frame);
ngx_int_t ngx_quic_split_frame(ngx_connection_t *c, ngx_quic_frame_t *f,
    size_t len);

ngx_chain_t *ngx_quic_alloc_chain(ngx_connection_t *c);
void ngx_quic_free_chain(ngx_connection_t *c, ngx_chain_t *in);

ngx_chain_t *ngx_quic_copy_buffer(ngx_connection_t *c, u_char *data,
    size_t len);
ngx_chain_t *ngx_quic_read_buffer(ngx_connection_t *c, ngx_quic_buffer_t *qb,
    uint64_t limit);
ngx_chain_t *ngx_quic_write_buffer(ngx_connection_t *c, ngx_quic_buffer_t *qb,
    ngx_chain_t *in, uint64_t limit, uint64_t offset);
void ngx_quic_skip_buffer(ngx_connection_t *c, ngx_quic_buffer_t *qb,
    uint64_t offset);
void ngx_quic_free_buffer(ngx_connection_t *c, ngx_quic_buffer_t *qb);

#if (NGX_DEBUG)
void ngx_quic_log_frame(ngx_log_t *log, ngx_quic_frame_t *f, ngx_uint_t tx);
#else
#define ngx_quic_log_frame(log, f, tx)
#endif

#endif /* _NGX_EVENT_QUIC_FRAMES_H_INCLUDED_ */