From a6163888f3c56123b1db313743c6147ba498732c Mon Sep 17 00:00:00 2001 From: Yuval Adam Date: Fri, 8 Aug 2014 14:42:07 +0300 Subject: Add third_party libs --- .../Demo/Common/ethernet/FreeRTOS-uIP/uip-split.c | 144 +++++++++++++++++++++ 1 file changed, 144 insertions(+) create mode 100644 third_party/FreeRTOS/Demo/Common/ethernet/FreeRTOS-uIP/uip-split.c (limited to 'third_party/FreeRTOS/Demo/Common/ethernet/FreeRTOS-uIP/uip-split.c') diff --git a/third_party/FreeRTOS/Demo/Common/ethernet/FreeRTOS-uIP/uip-split.c b/third_party/FreeRTOS/Demo/Common/ethernet/FreeRTOS-uIP/uip-split.c new file mode 100644 index 0000000..6828f3c --- /dev/null +++ b/third_party/FreeRTOS/Demo/Common/ethernet/FreeRTOS-uIP/uip-split.c @@ -0,0 +1,144 @@ +/* + * 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 + * + * $Id: uip-split.c,v 1.2 2006/06/12 08:00:30 adam Exp $ + */ +#include + +#include "uip-split.h" +#include "uip.h" +#include "uip-fw.h" +#include "uip_arch.h" + +#define BUF ( ( struct uip_tcpip_hdr * ) &uip_buf[UIP_LLH_LEN] ) + +/*-----------------------------------------------------------------------------*/ +void uip_split_output( void ) +{ + u16_t tcplen, len1, len2; + + /* We only try to split maximum sized TCP segments. */ + if( BUF->proto == UIP_PROTO_TCP && uip_len == UIP_BUFSIZE - UIP_LLH_LEN ) + { + tcplen = uip_len - UIP_TCPIP_HLEN; + + /* Split the segment in two. If the original packet length was + odd, we make the second packet one byte larger. */ + len1 = len2 = tcplen / 2; + if( len1 + len2 < tcplen ) + { + ++len2; + } + + /* Create the first packet. This is done by altering the length + field of the IP header and updating the checksums. */ + uip_len = len1 + UIP_TCPIP_HLEN; + #if UIP_CONF_IPV6 + + /* For IPv6, the IP length field does not include the IPv6 IP header + length. */ + BUF->len[0] = ( (uip_len - UIP_IPH_LEN) >> 8 ); + BUF->len[1] = ( (uip_len - UIP_IPH_LEN) & 0xff ); + #else /* UIP_CONF_IPV6 */ + BUF->len[0] = uip_len >> 8; + BUF->len[1] = uip_len & 0xff; + #endif /* UIP_CONF_IPV6 */ + + /* Recalculate the TCP checksum. */ + BUF->tcpchksum = 0; + BUF->tcpchksum = ~( uip_tcpchksum() ); + + #if !UIP_CONF_IPV6 + + /* Recalculate the IP checksum. */ + BUF->ipchksum = 0; + BUF->ipchksum = ~( uip_ipchksum() ); + #endif /* UIP_CONF_IPV6 */ + + /* Transmit the first packet. */ + + /* uip_fw_output();*/ + + // tcpip_output(); + + /* Now, create the second packet. To do this, it is not enough to + just alter the length field, but we must also update the TCP + sequence number and point the uip_appdata to a new place in + memory. This place is detemined by the length of the first + packet (len1). */ + uip_len = len2 + UIP_TCPIP_HLEN; + #if UIP_CONF_IPV6 + + /* For IPv6, the IP length field does not include the IPv6 IP header + length. */ + BUF->len[0] = ( (uip_len - UIP_IPH_LEN) >> 8 ); + BUF->len[1] = ( (uip_len - UIP_IPH_LEN) & 0xff ); + #else /* UIP_CONF_IPV6 */ + BUF->len[0] = uip_len >> 8; + BUF->len[1] = uip_len & 0xff; + #endif /* UIP_CONF_IPV6 */ + + /* uip_appdata += len1;*/ + memcpy( uip_appdata, ( u8_t * ) uip_appdata + len1, len2 ); + + uip_add32( BUF->seqno, len1 ); + BUF->seqno[0] = uip_acc32[0]; + BUF->seqno[1] = uip_acc32[1]; + BUF->seqno[2] = uip_acc32[2]; + BUF->seqno[3] = uip_acc32[3]; + + /* Recalculate the TCP checksum. */ + BUF->tcpchksum = 0; + BUF->tcpchksum = ~( uip_tcpchksum() ); + + #if !UIP_CONF_IPV6 + + /* Recalculate the IP checksum. */ + BUF->ipchksum = 0; + BUF->ipchksum = ~( uip_ipchksum() ); + #endif /* UIP_CONF_IPV6 */ + + /* Transmit the second packet. */ + + /* uip_fw_output();*/ + + // tcpip_output(); + } + else + { + /* uip_fw_output();*/ + + // tcpip_output(); + } +} + +/*-----------------------------------------------------------------------------*/ -- cgit v1.3.1