patch-2.3.49 linux/include/net/ip.h

• Lines: 15
• Date: Thu Mar 2 14:02:52 2000
• Orig file: v2.3.48/linux/include/net/ip.h
• Orig date: Sat Feb 12 11:22:11 2000

diff -u --recursive --new-file v2.3.48/linux/include/net/ip.h linux/include/net/ip.h
@@ -170,11 +170,9 @@
 extern __inline__
 int ip_decrease_ttl(struct iphdr *iph)
 {
-	u16 check = iph->check;
-	check = ntohs(check) + 0x0100;
-	if ((check & 0xFF00) == 0)
-		check++;		/* carry overflow */
-	iph->check = htons(check);
+	u32 check = iph->check;
+	check += __constant_htons(0x0100);
+	iph->check = check + (check>>16);
 	return --iph->ttl;
 }