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81 lines
1.8 KiB
C
81 lines
1.8 KiB
C
/*
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* Copyright (C) 2015-2017 Simon Brummer
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @defgroup net_gnrc_tcp TCP
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* @ingroup net_gnrc
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* @brief RIOT's tcp implementation for the gnrc stack
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*
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* @{
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*
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* @file
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* @brief Functions for allocating and freeing the receive buffer
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*
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* @author Simon Brummer <simon.brummer@posteo.de>
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*/
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#ifndef GNRC_TCP_INTERNAL_RCVBUF_H
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#define GNRC_TCP_INTERNAL_RCVBUF_H
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#include <stdint.h>
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#include "mutex.h"
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#include "net/gnrc/tcp/config.h"
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#include "net/gnrc/tcp/tcb.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Struct for a single connections receive buffer
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* @internal
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*/
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typedef struct rcvbuf_entry {
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uint8_t used; /**< Is entry currently in use */
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uint8_t buffer[GNRC_TCP_RCV_BUF_SIZE]; /**< Raw Buffer Data */
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} rcvbuf_entry_t;
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/**
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* @brief Stuct holding receive buffers
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* @internal
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*/
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typedef struct rcvbuf {
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mutex_t lock; /**< Lock for synchronization */
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rcvbuf_entry_t entries[GNRC_TCP_RCV_BUFFERS]; /**< Number of receive buffers */
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} rcvbuf_t;
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/**
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* @brief Initializes global receive Buffer
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* @internal
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*/
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void _rcvbuf_init(void);
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/**
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* @brief Initializes and assigns receive Buffer to tcb.
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*
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* @param[in] tcb Transmission control block that should hold the buffer.
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*
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* @return zero on success
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* @return -ENOMEM If receive buffer is out of memory.
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*/
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int _rcvbuf_get_buffer(gnrc_tcp_tcb_t *tcb);
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/**
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* @brief Free allocated receive buffer
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*
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* @param[in] tcb Transmission control block that buffer should be freed.
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*/
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void _rcvbuf_release_buffer(gnrc_tcp_tcb_t *tcb);
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#ifdef __cplusplus
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}
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#endif
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#endif /* GNRC_TCP_INTERNAL_RCVBUF_H */
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/** @} */
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