Wireshark mailing list archives
Re: ATM over Ethernet
From: Guy Harris <guy () alum mit edu>
Date: Mon, 5 Nov 2012 10:53:31 -0800
On Nov 5, 2012, at 4:14 AM, Alex Bennee <kernel-hacker () bennee com> wrote:
We use a fairly simple ATM over Ethernet encapsulation for linking old ATM based circuits with modern Ethernet based hardware. I was able to enable the packet-atm.c to decde these frames very easily (see attached) but I was looking for pointers for the next bit. Currently I can't see a way to specify treating the rest of the frame as multiple frames. Do I need to extend the ATM dissector to call itself if the remaining frame is larger than 53 bytes?
No, you need to implement a dissector for your ATM-over-Ethernet encapsulation that repeatedly calls the ATM dissector for each cell. Multiple cells encapsulated in an Ethernet packet is a characteristic of your encapsulation, not of ATM, so the code to handle that should be part of the dissector for your encapsulation, not the dissector for ATM.
Also how is the AAL encoding determined? Should I just register the handlers for the multiple AAL types and let the user decide?
Yes. The AAL encoding is determined by whatever AAL information is in the capture file, and I suspect that is often put there by a user explicitly configuring the capturing machine. ___________________________________________________________________________ Sent via: Wireshark-dev mailing list <wireshark-dev () wireshark org> Archives: http://www.wireshark.org/lists/wireshark-dev Unsubscribe: https://wireshark.org/mailman/options/wireshark-dev mailto:wireshark-dev-request () wireshark org?subject=unsubscribe
Current thread:
- ATM over Ethernet Alex Bennee (Nov 05)
- Re: ATM over Ethernet Guy Harris (Nov 05)
- Re: ATM over Ethernet Alex Bennée (Nov 06)
- Re: ATM over Ethernet Alex Bennée (Nov 06)
- Re: ATM over Ethernet Guy Harris (Nov 06)
- Re: ATM over Ethernet Alex Bennée (Nov 07)
- Re: ATM over Ethernet Evan Huus (Nov 06)
- Re: ATM over Ethernet Anders Broman (Nov 06)
- Re: ATM over Ethernet Guy Harris (Nov 06)
- Re: ATM over Ethernet Alex Bennée (Nov 06)
- Re: ATM over Ethernet Guy Harris (Nov 05)
- Re: ATM over Ethernet Alex Bennée (Nov 07)