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https://github.com/RIOT-OS/RIOT.git
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91 lines
3.1 KiB
C
91 lines
3.1 KiB
C
/*
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* Copyright (C) 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 Gnrc tcp's transmission control block
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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_TCB_H
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#define GNRC_TCP_TCB_H
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#include <stdint.h>
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#include <ringbuffer.h>
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#include <xtimer.h>
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#include <mutex.h>
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#include <msg.h>
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#include "net/gnrc.h"
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#include "config.h"
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#ifdef MODULE_GNRC_IPV6
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#include "net/gnrc/ipv6.h"
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#endif
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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 Size of the tcbs internal message queue
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*/
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#define GNRC_TCP_TCB_MSG_QUEUE_SIZE (8U)
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/**
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* @brief transmission control block of gnrc_tcp
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*/
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typedef struct _transmission_control_block {
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uint8_t address_family; /**< Address Family of local_addr and peer_addr */
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#ifdef MODULE_GNRC_IPV6
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uint8_t local_addr[sizeof(ipv6_addr_t)]; /**< local IP address */
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uint8_t peer_addr[sizeof(ipv6_addr_t)]; /**< peer IP address */
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#endif
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uint16_t local_port; /**< local connections port number */
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uint16_t peer_port; /**< port connections port number */
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uint8_t state; /**< Connections state */
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uint8_t status; /**< A connections status flags */
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uint32_t snd_una; /**< Send Unacknowledged */
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uint32_t snd_nxt; /**< Send Next */
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uint16_t snd_wnd; /**< Send Window */
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uint32_t snd_wl1; /**< SeqNo. Last Windowupdate */
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uint32_t snd_wl2; /**< AckNo. Last Windowupdate */
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uint32_t rcv_nxt; /**< Receive Next */
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uint16_t rcv_wnd; /**< Receive Window */
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uint32_t iss; /**< Initial Sequence Number */
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uint32_t irs; /**< Initial Received Sequence Number */
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uint16_t mss; /**< The peers MSS */
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uint32_t rtt_start; /**< Timer value for rtt estimation */
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int32_t rtt_var; /**< Round Trip Time variance */
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int32_t srtt; /**< Smoothed Round Trip Time */
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int32_t rto; /**< Retransmission Timeout Duration */
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uint8_t retries; /**< Number of Retransmissions */
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xtimer_t tim_tout; /**< Timer struct for timeouts */
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msg_t msg_tout; /**< Message, sent on timeouts */
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gnrc_pktsnip_t *pkt_retransmit; /**< Pointer to Packet in "retransmit queue" */
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kernel_pid_t owner; /**< PID of this connection handling thread */
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msg_t msg_queue[GNRC_TCP_TCB_MSG_QUEUE_SIZE]; /**< Tcb's message queue */
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uint8_t *rcv_buf_raw; /**< Pointer to the receive buffer */
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ringbuffer_t rcv_buf; /**< Receive Buffer data structure */
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mutex_t fsm_lock; /**< Mutex for FSM access synchronization */
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mutex_t function_lock; /**< Mutex for Function call synchronization */
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struct _transmission_control_block *next; /**< Pointer next TCP connection */
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} gnrc_tcp_tcb_t;
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#ifdef __cplusplus
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}
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#endif
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#endif /* GNRC_TCP_TCB_H */
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/** @} */
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