TCP/ip recive connection but locks up when trying to read data

Question

Please can someone tell me why my server locks up when my rclient connects and try to send data?

If I comment out:

Dim bytes(rclient.ReceiveBufferSiz         


        

Answer 1

You are assuming that reads return a specific amount of data such as ReceiveBufferSize. That is not true. A read returns at least one byte, that is all.

Just to clarify, TCP does not support message based transfer.

The correct way to read depends on the protocol. If the exact number of bytes expected is known you need to read in a loop until so many bytes are received (or use BinaryReader which does that for you).

For a line based protocol you can use StreamReader.ReadLine which again automates the looping.

ReceiveBufferSize is completely unrelated to how much data is available or will come.

DataAvailable is how much data can be read right now without blocking. But more data might come. It is almost always a bug to use it. Might return 0 at any time even if data comes in 1ms later.