diff options
| author | Yuval Adam <yuv.adm@gmail.com> | 2014-08-08 14:42:07 +0300 |
|---|---|---|
| committer | Yuval Adam <yuv.adm@gmail.com> | 2014-08-08 14:42:07 +0300 |
| commit | a6163888f3c56123b1db313743c6147ba498732c (patch) | |
| tree | ff7d15d991d1d09ba6cbc0cec80924f57445bfdd /third_party/FreeRTOS/Demo/Common/ethernet/FreeRTOS-uIP/uip-split.c | |
| parent | c3e4c9a25c2910d2d66d52215b3406b13d5b23d5 (diff) | |
Add third_party libs
Diffstat (limited to 'third_party/FreeRTOS/Demo/Common/ethernet/FreeRTOS-uIP/uip-split.c')
| -rw-r--r-- | third_party/FreeRTOS/Demo/Common/ethernet/FreeRTOS-uIP/uip-split.c | 144 |
1 files changed, 144 insertions, 0 deletions
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 <adam@sics.se>
+ *
+ * $Id: uip-split.c,v 1.2 2006/06/12 08:00:30 adam Exp $
+ */
+#include <string.h>
+
+#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();
+ }
+}
+
+/*-----------------------------------------------------------------------------*/
|