tcpdump mailing list archives

Re: tcp sequence and ack number with libpcap


From: Gert Doering <gert () greenie muc de>
Date: Thu, 19 Aug 2010 21:25:09 +0200

Hi,

On Thu, Aug 19, 2010 at 08:47:26PM +0200, Luis MartinGarcia. wrote:

I think you are performing your byte ordering conversion wrong. Seq and
Ack values are transmitted in network byte order so you need to perform
a "network to host long" conversion, and for that, you need to user
ntohl(), not htonl().

On standard platforms with byte order 1234 or 4321, there is no difference.

gert
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