Add FreeRTOS-Plus directory.

FreeRTOS/Demo/uIP_Demo_IAR_ARM7/uip/uip_arch.c

@@ -0,0 +1,145 @@
+/*
+ * Copyright (c) 2001, Adam Dunkels.
+ * 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. The name of the author may not be used to endorse or promote
+ *    products derived from this software without specific prior
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ *
+ * $Id: uip_arch.c,v 1.2.2.1 2003/10/04 22:54:17 adam Exp $
+ *
+ */
+
+
+#include "uip.h"
+#include "uip_arch.h"
+
+#define BUF ((uip_tcpip_hdr *)&uip_buf[UIP_LLH_LEN])
+#define IP_PROTO_TCP    6
+
+/*-----------------------------------------------------------------------------------*/
+void
+uip_add32(u8_t *op32, u16_t op16)
+{
+
+  uip_acc32[3] = op32[3] + (op16 & 0xff);
+  uip_acc32[2] = op32[2] + (op16 >> 8);
+  uip_acc32[1] = op32[1];
+  uip_acc32[0] = op32[0];
+
+  if(uip_acc32[2] < (op16 >> 8)) {
+    ++uip_acc32[1];
+    if(uip_acc32[1] == 0) {
+      ++uip_acc32[0];
+    }
+  }
+
+
+  if(uip_acc32[3] < (op16 & 0xff)) {
+    ++uip_acc32[2];
+    if(uip_acc32[2] == 0) {
+      ++uip_acc32[1];
+      if(uip_acc32[1] == 0) {
+	++uip_acc32[0];
+      }
+    }
+  }
+}
+/*-----------------------------------------------------------------------------------*/
+u16_t
+uip_chksum(u16_t *sdata, u16_t len)
+{
+  u16_t acc;
+
+  for (acc = 0; len > 1; len -= 2) {
+    u16_t u = ((unsigned char *)sdata)[0] + (((unsigned char *)sdata)[1] << 8);
+    if ((acc += u) < u) {
+      /* Overflow, so we add the carry to acc (i.e., increase by
+         one). */
+      ++acc;
+    }
+    ++sdata;
+  }
+
+  /* add up any odd byte */
+  if(len == 1) {
+    acc += htons(((u16_t)(*(u8_t *)sdata)) << 8);
+    if(acc < htons(((u16_t)(*(u8_t *)sdata)) << 8)) {
+      ++acc;
+    }
+  }
+
+  return acc;
+}
+/*-----------------------------------------------------------------------------------*/
+u16_t
+uip_ipchksum(void)
+{
+  return uip_chksum((u16_t *)&uip_buf[UIP_LLH_LEN], 20);
+}
+/*-----------------------------------------------------------------------------------*/
+u16_t
+uip_tcpchksum(void)
+{
+  u16_t hsum, sum;
+
+
+  /* Compute the checksum of the TCP header. */
+  hsum = uip_chksum((u16_t *)&uip_buf[20 + UIP_LLH_LEN], 20);
+
+  /* Compute the checksum of the data in the TCP packet and add it to
+     the TCP header checksum. */
+  sum = uip_chksum((u16_t *)uip_appdata,
+		   (u16_t)(((((u16_t)(BUF->len[0]) << 8) + BUF->len[1]) - 40)));
+
+  if((sum += hsum) < hsum) {
+    ++sum;
+  }
+
+  if((sum += BUF->srcipaddr[0]) < BUF->srcipaddr[0]) {
+    ++sum;
+  }
+  if((sum += BUF->srcipaddr[1]) < BUF->srcipaddr[1]) {
+    ++sum;
+  }
+  if((sum += BUF->destipaddr[0]) < BUF->destipaddr[0]) {
+    ++sum;
+  }
+  if((sum += BUF->destipaddr[1]) < BUF->destipaddr[1]) {
+    ++sum;
+  }
+  if((sum += (u16_t)htons((u16_t)IP_PROTO_TCP)) < (u16_t)htons((u16_t)IP_PROTO_TCP)) {
+    ++sum;
+  }
+
+  hsum = (u16_t)htons((((u16_t)(BUF->len[0]) << 8) + BUF->len[1]) - 20);
+
+  if((sum += hsum) < hsum) {
+    ++sum;
+  }
+
+  return sum;
+}
+/*-----------------------------------------------------------------------------------*/