Ethereal-dev: [Ethereal-dev] Ethereal decodes bootp/dhcp option 2 incorrectly

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From: Radek Vokal <rvokal@xxxxxxxxxx>
Date: Thu, 07 Apr 2005 13:14:29 +0200
When ethereal displays the formatted packet for a bootp/dhcp DHCPACK
that contains option 2 (time offset), the value is not calculated
correctly.

Ethereal is treating the value as 32-bit UNsigned value, but it is
supposed to be a SIGNED value. (See RFC 2132, section 3.4 Time Offset)

Actual Results:  Response from DHCP server ... 02 04 ff ff 9d 90 ...
formatted as:

Option 2: Time Offset = 49709 days, 23 hours, 28 minutes, 16 seconds


Expected Results:  The data portion of the data (0xff ff 9d 90) must be
interpreted as a SIGNED number ( -25200 decimal) and is the number of
seconds offset from UTC.
This should display as:

Option 2: Time Offset = -7 hours
or
Option 2: Time Offset = 0 days, -7 hours, 0 minutes, 0 seconds

See Red Hat bugzilla
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=154082

-- 
Radek Vokál     <rvokal@xxxxxxxxxx> 
OS Systems Engineer
        IT executives rate Red Hat #1 for value
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