| /* |
| * 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 Contiki operating system. |
| * |
| * Author: Adam Dunkels <adam@sics.se> |
| * |
| * $Id: uip-split.h,v 1.2 2004/09/12 20:24:56 adamdunkels 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__ */ |
| |
| /** @} */ |
| /** @} */ |