mirror of https://github.com/openssl/openssl.git
117 lines
3.9 KiB
C
117 lines
3.9 KiB
C
/*
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* Copyright 2022 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#ifndef OSSL_QUIC_TXPIM_H
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# define OSSL_QUIC_TXPIM_H
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# include <openssl/ssl.h>
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# include "internal/quic_types.h"
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# include "internal/quic_cfq.h"
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# include "internal/quic_ackm.h"
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/*
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* QUIC Transmitted Packet Information Manager
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* ===========================================
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*/
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typedef struct quic_txpim_st QUIC_TXPIM;
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typedef struct quic_fifd_st QUIC_FIFD;
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typedef struct quic_txpim_pkt_st {
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/* ACKM-specific data. Caller should fill this. */
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OSSL_ACKM_TX_PKT ackm_pkt;
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/* Linked list of CFQ items in this packet. */
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QUIC_CFQ_ITEM *retx_head;
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/* Reserved for FIFD use. */
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QUIC_FIFD *fifd;
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/* Regenerate-strategy frames. */
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unsigned int had_handshake_done_frame : 1;
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unsigned int had_max_data_frame : 1;
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unsigned int had_max_streams_bidi_frame : 1;
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unsigned int had_max_streams_uni_frame : 1;
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unsigned int had_ack_frame : 1;
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/* Private data follows. */
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} QUIC_TXPIM_PKT;
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/* Represents a range of bytes in an application or CRYPTO stream. */
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typedef struct quic_txpim_chunk_st {
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/* The stream ID, or UINT64_MAX for the CRYPTO stream. */
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uint64_t stream_id;
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/*
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* The inclusive range of bytes in the stream. Exceptionally, if end <
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* start, designates a frame of zero length (used for FIN-only frames).
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*/
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uint64_t start, end;
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/*
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* Whether a FIN was sent for this stream in the packet. Not valid for
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* CRYPTO stream.
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*/
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unsigned int has_fin : 1;
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} QUIC_TXPIM_CHUNK;
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QUIC_TXPIM *ossl_quic_txpim_new(void);
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/*
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* Frees the TXPIM. All QUIC_TXPIM_PKTs which have been handed out by the TXPIM
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* must be released via a call to ossl_quic_txpim_pkt_release() before calling
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* this function.
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*/
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void ossl_quic_txpim_free(QUIC_TXPIM *txpim);
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/*
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* Allocates a new QUIC_TXPIM_PKT structure from the pool. Returns NULL on
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* failure. The returned structure is cleared of all data and is in a fresh
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* initial state.
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*/
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QUIC_TXPIM_PKT *ossl_quic_txpim_pkt_alloc(QUIC_TXPIM *txpim);
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/*
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* Releases the TXPIM packet, returning it to the pool.
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*/
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void ossl_quic_txpim_pkt_release(QUIC_TXPIM *txpim, QUIC_TXPIM_PKT *fpkt);
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/* Clears the chunk list of the packet, removing all entries. */
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void ossl_quic_txpim_pkt_clear_chunks(QUIC_TXPIM_PKT *fpkt);
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/* Appends a chunk to the packet. The structure is copied. */
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int ossl_quic_txpim_pkt_append_chunk(QUIC_TXPIM_PKT *fpkt,
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const QUIC_TXPIM_CHUNK *chunk);
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/* Adds a CFQ item to the packet by prepending it to the retx_head list. */
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void ossl_quic_txpim_pkt_add_cfq_item(QUIC_TXPIM_PKT *fpkt,
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QUIC_CFQ_ITEM *item);
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/*
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* Returns a pointer to an array of stream chunk information structures for the
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* given packet. The caller must call ossl_quic_txpim_pkt_get_num_chunks() to
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* determine the length of this array. The returned pointer is invalidated
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* if the chunk list is mutated, for example via a call to
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* ossl_quic_txpim_pkt_append_chunk() or ossl_quic_txpim_pkt_clear_chunks().
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*
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* The chunks are sorted by (stream_id, start) in ascending order.
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*/
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const QUIC_TXPIM_CHUNK *ossl_quic_txpim_pkt_get_chunks(const QUIC_TXPIM_PKT *fpkt);
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/*
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* Returns the number of entries in the array returned by
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* ossl_quic_txpim_pkt_get_chunks().
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*/
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size_t ossl_quic_txpim_pkt_get_num_chunks(const QUIC_TXPIM_PKT *fpkt);
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/*
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* Returns the number of QUIC_TXPIM_PKTs allocated by the given TXPIM that have
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* yet to be returned to the TXPIM.
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*/
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size_t ossl_quic_txpim_get_in_use(const QUIC_TXPIM *txpim);
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#endif
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