Ethereal-users: [Ethereal-users] Bit masking problem in ethereal display mode

Note: This archive is from the project's previous web site, ethereal.com. This list is no longer active.

Date Prev · Date Next · Thread Prev · Thread Next
Date Index · Thread Index · Other Months · All Mailing Lists
From: Kevin <kem2@xxxxxxx>
Date: Fri, 16 May 2003 11:28:10 -0400
I am running into a confusing problem wit bit masking in ethereal 0.9.12 on freebsd 4.8.
What I want to do is look at the bits 0 - 5 in the 1st octet of the UDP payload and see if it is equal to 0x02. My display filter is: 

				udp[8] & 0x1f = 2

When I apply this, I get an error box that reads:
 The string "&" was unexpected in this context

Does some one know what i am doing wrong?  This filter works in tcpdump

Thanks,
Kevin Mason