Re: Request for new DLT value for Wireshark Dissector

[Guy Harris <guy () alum mit edu>]

On Jan 12, 2011, at 4:59 AM, Schemmel, Hans-Christoph wrote:

> A packet begins with a flag (octet 0xF9, section 5.2.1.1), followed by address
> and control field.

Is this DLT value only for the Basic Option, or is it also used for the Advanced Option?  If it's also for the Advanced 
Option:

        1) Is the flag octet 0x7E if the Advanced Option is being used?

        2) If the Advanced Option is being used, do the packet contents include escape octets, or has de-escaping 
already been done?

Do frames include the FCS?

> The dissector is based upon the specification but there are slight deviations to
> meet the actual implementation of Cinterion and Siemens modules, e.g. no I frame
> support,

Presumably I-frame support could be added without breaking dissection of other captures?

> but an additional UIH_E frame.

Does the control field for those frames have a value that doesn't collide with any values specified in TS 27.010, so 
that dissecting UIH_E frames won't break dissection of any frames that conform to TS 27.010?-
This is the tcpdump-workers list.
Visit https://cod.sandelman.ca/ to unsubscribe.