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Dissector IEC-60870-5-103/101 works once

asked 2024-06-21 00:47:07 +0000

Alex Bal gravatar image

In the program I record the exchange using protocol IEC 60870-5-103 or IEC 60870-5-101. When viewing, I select the dissector menu RMB "Protocol preferences - Data - Open data preferences" and choice "IEC 60870-5-103". The data section is displayed correctly. But the next time you start the program, data parsing no longer works.

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The sample captures attached to 2917: packet-iec104.c - Add IEC 60870-5-103 Protocol Dissection use RTAC Serial Line and require the Decode As... setting.
The only preference for IEC 60870-5-103 would be if the packets came in over TCP.
Then the TCP dissector could pass off the payload for dissection.

Chuckc gravatar imageChuckc ( 2024-06-21 02:21:45 +0000 )edit

I use serial port server Moxa NPort, not RTAC. The decoding works correctly the first time, and then it stops. Three computers have this problem, one still decodes correctly. I checked different versions of Wireshark. I can't upload my pсap file.

Alex Bal gravatar imageAlex Bal ( 2024-06-21 17:52:51 +0000 )edit

To switch to another protocol, I disabled the current one (IEC 60870), this was a mistake. You can enable the protocol in the "Enable Protocols" menu

Alex Bal gravatar imageAlex Bal ( 2024-06-21 21:25:47 +0000 )edit

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answered 2024-06-22 13:46:19 +0000

Chuckc gravatar image
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RMB - right mouse button

Chuckc gravatar imageChuckc ( 2024-06-22 15:49:18 +0000 )edit

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Asked: 2024-06-21 00:47:07 +0000

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Last updated: Jun 22