Wireshark-users: [Wireshark-users] SLL unknown protocol
From: "Craig, Dave" <dwcraig@xxxxxxxxxxxx>
Date: Wed, 16 Aug 2006 20:17:10 -0700

Anyone have an idea what this packet means, or at least where in the kernel/app sources to look?  It was taken on a Linux 2.6 host using “any” capture.  For the vast majority of the packets in the trace it display the ethertype as the Protocol for the SLL header.  I had a hard time tracking down where in the kernel sources it would generate a 0 ethertype, and they payload doesn’t look like a netlink packet.

 

% tethereal -V -r tmp5.cap

Frame 1 (56 bytes on wire, 56 bytes captured)

    Arrival Time: Aug 16, 2006 10:58:29.761153000

    Time delta from previous packet: 0.000000000 seconds

    Time since reference or first frame: 0.000000000 seconds

    Frame Number: 1

    Packet Length: 56 bytes

    Capture Length: 56 bytes

    Protocols in frame: sll:data

Linux cooked capture

    Packet type: Sent by us (4)

    Link-layer address type: 1

    Link-layer address length: 6

    Source: IntelCor_00:3b:07 (00:15:17:00:3b:07)

    Protocol: Unknown (0x0000)

Data (40 bytes)

 

0000  5b 50 00 28 00 02 00 00 01 00 10 00 01 00 10 01   [P.(............

0010  00 00 00 78 00 00 00 01 00 15 17 00 3b 07 00 00   ...x........;...

0020  00 00 00 00 00 00 00 00                           ........

 

Thanks,

     Dave