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SML dissector doesn't work

asked 2019-11-14 10:52:35 +0000

Michael gravatar image

updated 2019-11-14 19:26:31 +0000

Guy Harris gravatar image


I try to comprehend this example:

But for me the dissector dosn't work. I've uploaded a screenshot

Does somebody has an idea?

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answered 2019-11-14 11:19:17 +0000

grahamb gravatar image

updated 2019-11-14 11:19:27 +0000

You need to set the dissector port (defaults to 0), either by editing the dissector preferences (Edit -> Preferences -> Protocols -> SML) or by right clicking any packet in the list and selecting "Decode As..." (or from the menu Analyze -> Decode As...) and choosing TCP port 7259 (for the example capture).

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Thank you for the fast reply.

Now that works for me. But how do I act in case of an offline file without a tcp frame?

Michael gravatar imageMichael ( 2019-11-14 11:59:18 +0000 )edit

The SML dissector only dissects traffic over UDP or TCP.

You can use text2pcap to create a pcap file. By using the option -T along with suitable source and destination ports, e.g. -T 3293,7259 to match that in the sample file.

grahamb gravatar imagegrahamb ( 2019-11-14 12:16:20 +0000 )edit

works also great. Big thanks to you, for supporting me.


Michael gravatar imageMichael ( 2019-11-14 13:03:24 +0000 )edit

But how do I act in case of an offline file without a tcp frame?

Do you mean an offline file whose contents are as shown in the Wireshark Wiki SML page, with the first four bytes being 0x1b, followed by 4 bytes of version number, followed by a sequence of messages?

Guy Harris gravatar imageGuy Harris ( 2019-11-14 19:28:49 +0000 )edit

yes, that's exactly what I mean.

Michael gravatar imageMichael ( 2019-11-15 07:06:28 +0000 )edit

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Asked: 2019-11-14 10:52:35 +0000

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Last updated: Nov 14 '19