How to receive tcp/udp packet?

PC_A : shoot packet (Colasoft packet builder)

PC_B : receive it (Wireshark)

Wireshark received it but Matlab is an error(not connected)!

search various web site but not obvious

show me a simple example code!

Answer 1

[Narvik]

Hi,

As per my understanding, you are trying to receive TCP/UDP packets in MATLAB and encountering connection errors.

To receive packets, make sure you have the Instrument Control Toolbox installed, your firewall permits connections on the specified port, and the network configurations between PCs are correctly set up.

Refer to the following code to set up a basic UDP and TCP receiver:

% Create UDP object
udpReceiver = udpport("LocalPort", 12345);

% Read data
data = read(udpReceiver, 100, "uint8");

% Create TCP server object
tcpReceiver = tcpserver("0.0.0.0", 12345);

% Wait for connection and read data
while ~tcpReceiver.Connected
    pause(0.1);
end
data = read(tcpReceiver, tcpReceiver.NumBytesAvailable, "uint8");

Refer to the following documentation for more information on "uddport" and "tcpport" MATLAB functions:

• https://www.mathworks.com/help/instrument/udpport.html
• https://www.mathworks.com/help/instrument/tcpserver.html

Hope this helps!