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I cannot enter a filter for tcp port 61883. What is so special about this number?

asked 2018-05-23 18:59:36 +0000

Shahbaz gravatar image

It seems that all other port numbers (at least the ones that I worked with) are Ok. But, I cannot filter out based on this port number. Why? I tested with version 2.4.5 and 2.2.6.

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What exact filter are you attempting to apply?

cmaynard gravatar imagecmaynard ( 2018-05-23 19:28:24 +0000 )edit

"tcp.port == 61883". It works with any other port number, but not 61883

Shahbaz gravatar imageShahbaz ( 2018-05-23 19:29:50 +0000 )edit

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answered 2018-05-23 19:36:40 +0000

Pascal Quantin gravatar image

61883 appears to be a protocol name also (declared in packet-ieee1722.c) which confuses the filtering engine. We should probably rename it to avoid the collision.

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I am not super familiar with the filtering engine. But, does that mean I cannot do that with the compiled Windows version?

Shahbaz gravatar imageShahbaz ( 2018-05-23 19:40:00 +0000 )edit

Until we fix the code (I will upload a patch very shortly) you can workaround the issue by typing the port number in hexadecimal (tcp.port==0xf1bb).

Pascal Quantin gravatar imagePascal Quantin ( 2018-05-23 19:57:38 +0000 )edit

Thanks. That was really helpful :)

Shahbaz gravatar imageShahbaz ( 2018-05-23 19:58:58 +0000 )edit

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Pascal Quantin gravatar imagePascal Quantin ( 2018-05-23 20:00:59 +0000 )edit

The collision with the IEC 61883 protocol is now fixed, and the change will be part of Wireshark 2.4.8 and 2.6.2 once released. Thanks for the report.

Pascal Quantin gravatar imagePascal Quantin ( 2018-05-24 11:38:05 +0000 )edit

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Asked: 2018-05-23 18:59:36 +0000

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Last updated: May 23