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tcp comm, forte crashes [message #1849289]

Tue, 11 January 2022 13:50

David Pf

Messages: 3
Registered: January 2022

Junior Member

Hi,

i try to send a string bigger than 1500 bytes over tcp (usually strings). I use the Server Client FBs and standard encoding/fbdk (tried it also with raw[]). When i send the message with my client, forte on Server side crashes. I'm connecting two raspberryPi4 with a switch.
Is there something i am missing? Is the problem the MTU with TCP? It runs fine with strings smaller than 1500 bytes. I also implemented a commLayer with ZeroMQ, which works with larger strings (with fbdk encoding).

Maybe someone knows this problem or can tell me what i'm doing wrong :-).

Thanks,
David

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Re: tcp comm, forte crashes [message #1849291 is a reply to message #1849289]

Tue, 11 January 2022 15:32

David Pf

Messages: 3
Registered: January 2022

Junior Member

Additional Info:

I see the message with wireshark. It seems the connection works. The problem must be the Server FB?
I sent 2048 bytes.

Best regards,
David

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Re: tcp comm, forte crashes [message #1849296 is a reply to message #1849291]

Tue, 11 January 2022 21:33

Alois Zoitl

Messages: 1589
Registered: January 2014

Senior Member

unfurtunately yes the problem is on the server side. currently the tcp layer works with a statically allocated buffer. you can configure the buffer size in cmake under the option FORTE_IPLayerRecvBufferSize. The default is 1500. In order to set this option you need to tick the advanced check box in cmake. I hope this helps.

Cheers,
Alois

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