Wireshark mailing list archives

Re: Tshark usage in replaying icmpv6 messages


From: Guy Harris <guy () alum mit edu>
Date: Fri, 3 Aug 2012 12:57:25 -0700


On Aug 3, 2012, at 12:39 PM, naresh gudipudi wrote:

Yes, it is reading, not replaying.My mistake. I am specifying the fields with -e option. for example, the Target 
Address field(in icmpv6 header) in icmpv6 neighbor solicitaion message(icmpv6 type = 135) sent to solicited-node 
multicast address, i am specifying the filter as icmpv6.nd.ns.target_address. When this filter is used in wireshark 
GUI, it works. But in tshark, what all i can see is a nothing.

OK, so you have, for example, a capture file that, when you read it into Wireshark, and use 
"icmpv6.nd.ns.target_address" as a filter expression, it shows some packets, meaning that those packets have the 
"icmpv6.nd.ns.target_address" field in them, but if you run TShark with that capture file and with "-T fields" and "-e 
icmpv6.nd.ns.target_address", it doesn't print anything?

If so, then, if you have a capture file that shows that behavior and that you can make public by putting it into a bug, 
could you file a bug at

        http://bugs.wireshark.org/

and attach the capture file to the bug?  I have a capture with "icmpv6.nd.ns.target_address" in one of the packets in 
it, and when I run a recent build of TShark from the trunk on that capture file with "-T fields" and "-e 
icmpv6.nd.ns.target_address", it prints the target address.
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