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RIOT/sys/include/net/gnrc/tcp/config.h 2.98 KB
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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 network stack.
   *
   * @{
   *
   * @file
   * @brief       GNRC TCP configuration
   *
   * @author      Simon Brummer <simon.brummer@posteo.de>
   */
  
  #ifndef NET_GNRC_TCP_CONFIG_H
  #define NET_GNRC_TCP_CONFIG_H
  
  #include "timex.h"
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  /**
   * @brief Timeout duration for user calls. Default is 2 minutes.
   */
  #ifndef GNRC_TCP_CONNECTION_TIMEOUT_DURATION
  #define GNRC_TCP_CONNECTION_TIMEOUT_DURATION (120U * US_PER_SEC)
  #endif
  
  /**
   * @brief Maximum segment lifetime (MSL). Default is 30 seconds.
   */
  #ifndef GNRC_TCP_MSL
  #define GNRC_TCP_MSL (30U * US_PER_SEC)
  #endif
  
  /**
   * @brief Maximum Segement Size (MSS).
   */
  #ifndef GNRC_TCP_MSS
  #ifdef  MODULE_GNRC_IPV6
  #define GNRC_TCP_MSS (1220U) /**< If IPv6 is used. Get MSS = 1280 - IPv6 Hdr - TCP Hdr = 1220 */
  #else
  #define GNRC_TCP_MSS (576U) /**< Default MSS */
  #endif
  #endif
  
  /**
   * @brief MSS Multiplicator = Number of MSS sized packets stored in receive buffer
   */
  #ifndef GNRC_TCP_MSS_MULTIPLICATOR
  #define GNRC_TCP_MSS_MULTIPLICATOR (1U)
  #endif
  
  /**
   * @brief Default receive window size
   */
  #ifndef GNRC_TCP_DEFAULT_WINDOW
  #define GNRC_TCP_DEFAULT_WINDOW (GNRC_TCP_MSS * GNRC_TCP_MSS_MULTIPLICATOR)
  #endif
  
  /**
   * @brief Number of preallocated receive buffers
   */
  #ifndef GNRC_TCP_RCV_BUFFERS
  #define GNRC_TCP_RCV_BUFFERS (1U)
  #endif
  
  /**
   * @brief Default receive buffer size
   */
  #ifndef GNRC_TCP_RCV_BUF_SIZE
  #define GNRC_TCP_RCV_BUF_SIZE (GNRC_TCP_DEFAULT_WINDOW)
  #endif
  
  /**
   * @brief Lower bound for RTO = 1 sec (see RFC 6298)
   */
  #ifndef GNRC_TCP_RTO_LOWER_BOUND
  #define GNRC_TCP_RTO_LOWER_BOUND (1U * US_PER_SEC)
  #endif
  
  /**
   * @brief Upper bound for RTO = 60 sec (see RFC 6298)
   */
  #ifndef GNRC_TCP_RTO_UPPER_BOUND
  #define GNRC_TCP_RTO_UPPER_BOUND (60U * US_PER_SEC)
  #endif
  
  /**
   * @brief Assumes clock granularity for TCP of 10 ms (see RFC 6298)
   */
  #ifndef GNRC_TCP_RTO_GRANULARITY
  #define GNRC_TCP_RTO_GRANULARITY (10U * MS_PER_SEC)
  #endif
  
  /**
   * @brief Alpha value for RTO calculation, default is 1/8
   */
  #ifndef GNRC_TCP_RTO_A_DIV
  #define GNRC_TCP_RTO_A_DIV (8U)
  #endif
  
  /**
   * @brief Beta value for RTO calculation, default is 1/4
   */
  #ifndef GNRC_TCP_RTO_B_DIV
  #define GNRC_TCP_RTO_B_DIV (4U)
  #endif
  
  /**
   * @brief K value for RTO calculation, default is 4
   */
  #ifndef GNRC_TCP_RTO_K
  #define GNRC_TCP_RTO_K (4U)
  #endif
  
  /**
   * @brief Lower bound for the duration between probes
   */
  #ifndef GNRC_TCP_PROBE_LOWER_BOUND
  #define GNRC_TCP_PROBE_LOWER_BOUND (1U * US_PER_SEC)
  #endif
  
  /**
   * @brief Upper bound for the duration between probes
   */
  #ifndef GNRC_TCP_PROBE_UPPER_BOUND
  #define GNRC_TCP_PROBE_UPPER_BOUND (60U * US_PER_SEC)
  #endif
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* NET_GNRC_TCP_CONFIG_H */
  /** @} */