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TCP/IP Socket Programming
#19
Hi,

I don't know anything about the device you are connecting to, or what SB code you are using apart from the connect command.

I am guessing that you connect to some device, and I guess that 'wireshark sniffer tool' records network traffic - I've never heard of or used it.

It sees some traffic (line 6) and your question is this being sent by the connection?

This is a lot of guessing by me.  Under the hood the extension LDCLient.Connect calls this connection command:

https://learn.microsoft.com/en-gb/dotnet...ew=net-9.0

I don't know in detail exactly what this does at a low level.

Maybe this helps (a bit of googling) - looks like maybe the device was sent something it didn't understand (line5?), but I'm not an expert at all on TCP:

https://www.pico.net/kb/what-is-a-tcp-reset-rst/

Or

https://www.howtouselinux.com/post/tcp-flags

Maybe someone else here has some experience with low level TCP

EDIT, maybe the SB program ended and the connection was closed?
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Messages In This Thread
TCP/IP Socket Programming - by Juergen - 07-14-2025, 08:35 AM
RE: TCP/IP Socket Programming - by litdev - 07-14-2025, 02:49 PM
RE: TCP/IP Socket Programming - by Juergen - 07-16-2025, 09:40 AM
RE: TCP/IP Socket Programming - by Juergen - 07-25-2025, 10:55 AM
RE: TCP/IP Socket Programming - by litdev - 07-25-2025, 11:23 AM
RE: TCP/IP Socket Programming - by Juergen - 07-25-2025, 11:48 AM
RE: TCP/IP Socket Programming - by litdev - 07-25-2025, 01:12 PM
RE: TCP/IP Socket Programming - by Juergen - 07-25-2025, 06:17 PM
RE: TCP/IP Socket Programming - by litdev - 07-25-2025, 06:33 PM
RE: TCP/IP Socket Programming - by Juergen - 07-27-2025, 08:49 AM
RE: TCP/IP Socket Programming - by litdev - 07-27-2025, 10:50 AM
RE: TCP/IP Socket Programming - by Juergen - 07-27-2025, 12:21 PM
RE: TCP/IP Socket Programming - by litdev - 07-27-2025, 01:42 PM
RE: TCP/IP Socket Programming - by Juergen - 07-28-2025, 08:04 AM
RE: TCP/IP Socket Programming - by litdev - 07-28-2025, 08:32 AM
RE: TCP/IP Socket Programming - by WhTurner - 07-28-2025, 12:37 PM
RE: TCP/IP Socket Programming - by Juergen - 08-23-2025, 06:39 AM
RE: TCP/IP Socket Programming - by litdev - 08-23-2025, 12:33 PM

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