mirror of
https://github.com/RIOT-OS/RIOT.git
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138 lines
3.3 KiB
C
138 lines
3.3 KiB
C
/*
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* Copyright (C) 2015 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 Helperfunctions and defines
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*
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* @author Simon Brummer <brummer.simon@googlemail.com>
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*/
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#ifndef GNRC_TCP_INTERNAL_COMMON_H_
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#define GNRC_TCP_INTERNAL_COMMON_H_
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#include <stdint.h>
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#include "kernel_types.h"
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#include "thread.h"
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#include "mutex.h"
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#include "net/gnrc/netapi.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 Port unspecified.
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*
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* @note PORT 0 is unspecified (@see https://www.ietf.org/rfc/rfc1700.txt)
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*/
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#define PORT_UNSPEC (0)
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/**
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* @brief Status Flags for TCP
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* @{
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*/
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#define STATUS_PASSIVE (1 << 0)
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#define STATUS_ALLOW_ANY_ADDR (1 << 1)
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/** @} */
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/**
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* @brief Defines for gnrc tcps "eventloop" thread
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* @{
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*/
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#define TCP_EVENTLOOP_MSG_QUEUE_SIZE (8U)
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#define TCP_EVENTLOOP_PRIO (THREAD_PRIORITY_MAIN - 2U)
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#define TCP_EVENTLOOP_STACK_SIZE (THREAD_STACKSIZE_DEFAULT)
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/** @} */
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/**
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* @brief Bitmasks for control bit handling
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* @{
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*/
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#define MSK_FIN (0x0001)
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#define MSK_SYN (0x0002)
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#define MSK_RST (0x0004)
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#define MSK_PSH (0x0008)
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#define MSK_ACK (0x0010)
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#define MSK_URG (0x0020)
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#define MSK_FIN_ACK (0x0011)
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#define MSK_SYN_ACK (0x0012)
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#define MSK_RST_ACK (0x0014)
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#define MSK_SYN_FIN_ACK (0x0013)
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#define MSK_FIN_ACK_PSH (0x0019)
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#define MSK_CTL (0x003F)
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#define MSK_OFFSET (0xF000)
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/** @} */
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/**
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* @brief Type field values for TCP internal Message Passing.
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* @{
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*/
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#define MSG_TYPE_CONNECTION_TIMEOUT (GNRC_NETAPI_MSG_TYPE_ACK + 101)
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#define MSG_TYPE_PROBE_TIMEOUT (GNRC_NETAPI_MSG_TYPE_ACK + 102)
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#define MSG_TYPE_USER_SPEC_TIMEOUT (GNRC_NETAPI_MSG_TYPE_ACK + 103)
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#define MSG_TYPE_RETRANSMISSION (GNRC_NETAPI_MSG_TYPE_ACK + 104)
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#define MSG_TYPE_TIMEWAIT (GNRC_NETAPI_MSG_TYPE_ACK + 105)
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#define MSG_TYPE_NOTIFY_USER (GNRC_NETAPI_MSG_TYPE_ACK + 106)
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/** @} */
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/**
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* @brief Macro to mark is the time measurement is uninitialized
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*/
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#define RTO_UNINITIALIZED (-1)
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/**
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* @brief Overflow tolerant comparision operators for sequence and
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acknowledgement number comparision
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* @{
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*/
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#define LSS_32_BIT(x, y) (((int32_t) (x)) - ((int32_t) (y)) < 0)
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#define LEQ_32_BIT(x, y) (((int32_t) (x)) - ((int32_t) (y)) <= 0)
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#define GRT_32_BIT(x, y) (!LEQ_32_BIT(x, y))
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#define GEQ_32_BIT(x, y) (!LSS_32_BOT(x, y))
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/** @} */
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/**
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* @brief Check if a given sequence number, falls into the a receive window
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*/
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#define INSIDE_WND(l_ed, seq_num, r_ed) (LEQ_32_BIT(l_ed, seq_num) && LSS_32_BIT(seq_num, r_ed))
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/**
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* @brief Extract offset value from "offctl"-header field.
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*/
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#define GET_OFFSET( x ) (((x) & MSK_OFFSET) >> 12)
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/**
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* @brief PID of tcp event handling thread
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*/
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extern kernel_pid_t gnrc_tcp_pid;
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/**
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* @brief Head of conn linked list.
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*/
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extern gnrc_tcp_tcb_t *_list_tcb_head;
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/**
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* @brief Mutex to protect linked list.
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*/
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extern mutex_t _list_tcb_lock;
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#ifdef __cplusplus
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}
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#endif
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#endif /* GNRC_TCP_INTERNAL_COMMON_H_ */
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/** @} */
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