/* | |
* 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__ */ | |
/** @} */ | |
/** @} */ |