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/*
* Copyright (C) 2015-2017 Simon Brummer
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @defgroup net_gnrc_tcp TCP
* @ingroup net_gnrc
* @brief RIOT's tcp implementation for the gnrc stack
*
* @{
*
* @file
* @brief Internally used common defines, macros and variable declaration
*
* @author Simon Brummer <simon.brummer@posteo.de>
*/
#ifndef GNRC_TCP_INTERNAL_COMMON_H
#define GNRC_TCP_INTERNAL_COMMON_H
#include <stdint.h>
#include "kernel_types.h"
#include "thread.h"
#include "mutex.h"
#include "net/gnrc/netapi.h"
#include "net/gnrc/tcp/tcb.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Port unspecified.
*
* @note PORT 0 is unspecified (@see https://www.ietf.org/rfc/rfc1700.txt)
*/
#define PORT_UNSPEC (0)
/**
* @brief Status Flags for TCP
* @{
*/
#define STATUS_PASSIVE (1 << 0)
#define STATUS_ALLOW_ANY_ADDR (1 << 1)
/** @} */
/**
* @brief Defines for gnrc tcps "eventloop" thread
* @{
*/
#define TCP_EVENTLOOP_MSG_QUEUE_SIZE (8U)
#define TCP_EVENTLOOP_PRIO (THREAD_PRIORITY_MAIN - 2U)
#define TCP_EVENTLOOP_STACK_SIZE (THREAD_STACKSIZE_DEFAULT)
/** @} */
/**
* @brief Bitmasks for control bit handling
* @{
*/
#define MSK_FIN (0x0001)
#define MSK_SYN (0x0002)
#define MSK_RST (0x0004)
#define MSK_PSH (0x0008)
#define MSK_ACK (0x0010)
#define MSK_URG (0x0020)
#define MSK_FIN_ACK (0x0011)
#define MSK_SYN_ACK (0x0012)
#define MSK_RST_ACK (0x0014)
#define MSK_SYN_FIN_ACK (0x0013)
#define MSK_FIN_ACK_PSH (0x0019)
#define MSK_CTL (0x003F)
#define MSK_OFFSET (0xF000)
/** @} */
/**
* @brief Type field values for TCP internal Message Passing.
* @{
*/
#define MSG_TYPE_CONNECTION_TIMEOUT (GNRC_NETAPI_MSG_TYPE_ACK + 101)
#define MSG_TYPE_PROBE_TIMEOUT (GNRC_NETAPI_MSG_TYPE_ACK + 102)
#define MSG_TYPE_USER_SPEC_TIMEOUT (GNRC_NETAPI_MSG_TYPE_ACK + 103)
#define MSG_TYPE_RETRANSMISSION (GNRC_NETAPI_MSG_TYPE_ACK + 104)
#define MSG_TYPE_TIMEWAIT (GNRC_NETAPI_MSG_TYPE_ACK + 105)
#define MSG_TYPE_NOTIFY_USER (GNRC_NETAPI_MSG_TYPE_ACK + 106)
/** @} */
/**
* @brief Macro to mark is the time measurement is uninitialized
*/
#define RTO_UNINITIALIZED (-1)
/**
* @brief Overflow tolerant comparision operators for sequence and
acknowledgement number comparision
* @{
*/
#define LSS_32_BIT(x, y) (((int32_t) (x)) - ((int32_t) (y)) < 0)
#define LEQ_32_BIT(x, y) (((int32_t) (x)) - ((int32_t) (y)) <= 0)
#define GRT_32_BIT(x, y) (!LEQ_32_BIT(x, y))
#define GEQ_32_BIT(x, y) (!LSS_32_BOT(x, y))
/** @} */
/**
* @brief Check if a given sequence number, falls into the a receive window
*/
#define INSIDE_WND(l_ed, seq_num, r_ed) (LEQ_32_BIT(l_ed, seq_num) && LSS_32_BIT(seq_num, r_ed))
/**
* @brief Extract offset value from "offctl"-header field.
*/
#define GET_OFFSET( x ) (((x) & MSK_OFFSET) >> 12)
/**
* @brief PID of tcp event handling thread
*/
extern kernel_pid_t gnrc_tcp_pid;
/**
* @brief Head of conn linked list.
*/
extern gnrc_tcp_tcb_t *_list_tcb_head;
/**
* @brief Mutex to protect linked list.
*/
extern mutex_t _list_tcb_lock;
#ifdef __cplusplus
}
#endif
#endif /* GNRC_TCP_INTERNAL_COMMON_H */
/** @} */