text: /*
   * Copyright (c) 2004, Swedish Institute of Computer Science.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. Neither the name of the Institute nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   *
   * This file is part of the uIP TCP/IP stack
   *
   * Author: Adam Dunkels <adam@sics.se>
   *
   * $Id: uip-split.h,v 1.2 2006/06/12 08:00:30 adam Exp $
   */
  /**
   * \addtogroup uip
   * @{
   */
  
  /**
   * \defgroup uipsplit uIP TCP throughput booster hack
   * @{
   *
   * The basic uIP TCP implementation only allows each TCP connection to
   * have a single TCP segment in flight at any given time. Because of
   * the delayed ACK algorithm employed by most TCP receivers, uIP's
   * limit on the amount of in-flight TCP segments seriously reduces the
   * maximum achievable throughput for sending data from uIP.
   *
   * The uip-split module is a hack which tries to remedy this
   * situation. By splitting maximum sized outgoing TCP segments into
   * two, the delayed ACK algorithm is not invoked at TCP
   * receivers. This improves the throughput when sending data from uIP
   * by orders of magnitude.
   *
   * The uip-split module uses the uip-fw module (uIP IP packet
   * forwarding) for sending packets. Therefore, the uip-fw module must
   * be set up with the appropriate network interfaces for this module
   * to work.
   */
  
  
  /**
   * \file
   * Module for splitting outbound TCP segments in two to avoid the
   * delayed ACK throughput degradation.
   * \author
   * Adam Dunkels <adam@sics.se>
   *
   */
  
  #ifndef __UIP_SPLIT_H__
  #define __UIP_SPLIT_H__
  
  /**
   * Handle outgoing packets.
   *
   * This function inspects an outgoing packet in the uip_buf buffer and
   * sends it out using the uip_fw_output() function. If the packet is a
   * full-sized TCP segment it will be split into two segments and
   * transmitted separately. This function should be called instead of
   * the actual device driver output function, or the uip_fw_output()
   * function.
   *
   * The headers of the outgoing packet is assumed to be in the uip_buf
   * buffer and the payload is assumed to be wherever uip_appdata
   * points. The length of the outgoing packet is assumed to be in the
   * uip_len variable.
   *
   */
  void uip_split_output(void);
  
  #endif /* __UIP_SPLIT_H__ */
  
  /** @} */
  /** @} */
  