Re: IP Header Size is always 5

[Sebastien Roy <Sebastien.Roy () Sun COM>]

On Wed, 2009-04-01 at 20:42 +0530, Shameem Ahamed wrote:
> I was trying to create a function (for testing purpose) which displays
> the header information for Ethernet, IP and TCP using a Linux machine.
> The problem i am having is, whenever i read any packet from the saved
> pcap file, it displays the IP header size (ip->ip_hl) is 5 (some times
> less than 5).

The header length field in an IPv4 header is the length of the header in
32-bit words (not in bytes).  See RFC 791.

-Seb


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