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List:       wireshark-dev
Subject:    Re: [Wireshark-dev] [Wireshark-users] Use of User DLT
From:       Guy Harris <guy () alum ! mit ! edu>
Date:       2009-07-24 1:04:20
Message-ID: 2A967C26-D644-4D4D-A798-3E55A7B7CDFC () alum ! mit ! edu
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On Jul 21, 2009, at 10:44 AM, Mahesh K wrote:

> I get the following error "No such proto:ldm". Now I do see that the  
> ldm dissector is successfully registered.

Unless you've used register_dissector(), you have *not* successfully  
registered the dissector by name - and the "Payload protocol" item in  
the encapsulations table is really the payload *dissector*, not the  
payload *protocol*.

You might have registered the *protocol* with proto_register_protocol 
(), but there isn't necessarily a one-to-one correspondence between  
protocols and dissectors (there might be multiple dissectors for the  
same protocol, depending on whether, for example, extra metadata is  
supplied for the protocol outside the packet data, or whether the  
packets have an FCS, or whether the protocol is running atop TCP or  
not, or....)
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