Hi,
Not for UDP, there the checksum can be omitted.
Thanx,
Jaap
On Sun, 11 Feb 2007, Keith French wrote:
> In the IP, TCP or UDP headers is the "Checksum" field, which has two parts to it. For the IP checksum this is:-
>
> Header checksum: 0xbbd5 [correct]
> [Good: True]
> [Bad : False]
>
> with similar for the TCP and UDP checksums.
>
> Is there any difference from a logical point of view when using a display filter to find packets with bad IP checksums between these two expressions:-
>
> ip.checksum_bad == 1
>
> or
>
> ip.checksum_good == 0
>
> As a checksum can only be correct or bad, surely both of these filters are the same?
>
