1--- linux.old/net/ipv4/netfilter/ipt_ECN.c.orig 2002-12-09 23:14:20.000000000 +0100 2+++ linux/net/ipv4/netfilter/ipt_ECN.c 2002-12-09 23:13:27.000000000 +0100 3@@ -88,8 +88,8 @@ 4 } 5 6 if (diffs[0] != *tcpflags) { 7- diffs[0] = htons(diffs[0]) ^ 0xFFFF; 8- diffs[1] = htons(*tcpflags); 9+ diffs[0] = diffs[0] ^ 0xFFFF; 10+ diffs[1] = *tcpflags; 11 tcph->check = csum_fold(csum_partial((char *)diffs, 12 sizeof(diffs), 13 tcph->check^0xFFFF)); 14 15