From: John Hodge <tpg@mutabah.net>
Date: Sat, 20 Nov 2010 05:00:34 +0000 (+0800)
Subject: Fixed IPv4 checksum (network byte order, dimwit)
X-Git-Tag: rel0.07~58
X-Git-Url: https://git.ucc.asn.au/?p=tpg%2Facess2.git;a=commitdiff_plain;h=26e66aa0a682e2f1a5d9328b6037b5779310f8f3

Fixed IPv4 checksum (network byte order, dimwit)
---

diff --git a/Modules/IPStack/ipv4.c b/Modules/IPStack/ipv4.c
index e37085bf..31d6f027 100644
--- a/Modules/IPStack/ipv4.c
+++ b/Modules/IPStack/ipv4.c
@@ -284,9 +284,10 @@ Uint16 IPv4_Checksum(const void *Buf, int Size)
 	Size = (Size + 1) >> 1;	// 16-bit word count
 	for(i = 0; i < Size; i++ )
 	{
-		if((int)sum + arr[i] > 0xFFFF)
+		Uint16	val = ntohs(arr[i]);
+		if((int)sum + val > 0xFFFF)
 			sum ++;	// Simulate 1's complement
-		sum += arr[i];
+		sum += val;
 	}
 	return ~sum ;
 }