6f1e5c74ef
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@308 42af7a65-404d-4744-a932-0658087f49c3
97 lines
3.5 KiB
C
97 lines
3.5 KiB
C
/*
|
|
* 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 1.1.1.1 2007-08-26 23:04:08 patacongo 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__ */
|
|
|
|
/** @} */
|
|
/** @} */
|