From 9f60d09c6faaac732a62a188228a88321aad7368 Mon Sep 17 00:00:00 2001
From: patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>
Date: Tue, 2 Sep 2008 23:04:10 +0000
Subject: Add NSH ping command

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@870 42af7a65-404d-4744-a932-0658087f49c3
---
 nuttx/net/uip/uip-chksum.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'nuttx/net/uip/uip-chksum.c')

diff --git a/nuttx/net/uip/uip-chksum.c b/nuttx/net/uip/uip-chksum.c
index 50602f481..479ebc797 100644
--- a/nuttx/net/uip/uip-chksum.c
+++ b/nuttx/net/uip/uip-chksum.c
@@ -55,6 +55,7 @@
  ****************************************************************************/
 
 #define BUF ((struct uip_ip_hdr *)&dev->d_buf[UIP_LLH_LEN])
+#define ICMPBUF ((struct uip_icmpip_hdr *)&dev->d_buf[UIP_LLH_LEN])
 
 /****************************************************************************
  * Private Data
@@ -224,6 +225,16 @@ uint16 uip_udpchksum(struct uip_driver_s *dev)
   return upper_layer_chksum(dev, UIP_PROTO_UDP);
 }
 #endif
+
+/* Calculate the checksum of the ICMP message */
+
+#if defined(CONFIG_NET_ICMP) && defined(CONFIG_NET_ICMP_PING)
+uint16 uip_icmpchksum(struct uip_driver_s *dev)
+{
+  return uip_chksum((uint16*)&ICMPBUF->type, dev->d_sndlen);
+}
+#endif
+
 #endif /* UIP_ARCH_CHKSUM */
 
 #endif /* CONFIG_NET */
-- 
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