2 replies to this topic

[Nart Schinackow]

i have a problem with the netduino plus please read the code below ...

this code is the netduino code

INTERFACE = NetworkInterface.GetAllNetworkInterfaces()[0];
INTERFACE.EnableStaticIP("192.168.15.5", "255.255.255.0", "192.168.15.1");
END_POINT = new IPEndPoint(IPAddress.Parse("192.168.15.5"), 90);
Thread.Sleep(5000);
ledpin.Write(true);
SOCK = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
SOCK.Bind(END_POINT);
SOCK.Listen(1);
byte[] s=UTF8Encoding.UTF8.GetBytes("nart schinackow");
while (true)
{
ACCP_SOCK = SOCK.Accept();
for (byte i = 0; i < 10; i++)
ACCP_SOCK.Send(s);
ACCP_SOCK.Close();
}

this code is the pc code

private void button1_Click(object sender, EventArgs e)
{
Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
sock.Connect(new IPEndPoint(IPAddress.Parse("192.168.15.5"), 90));
byte[] r = new byte[100];
for (int i = 0; i < 10; i++)
{
sock.Receive(r);
}
sock.Close();
}

each time i press the button on the windows application code it keeps giving me this exception on the netduino application:

#### Exception System.Net.Sockets.SocketException - CLR_E_FAIL (1) ####
#### Message:
#### Microsoft.SPOT.Net.SocketNative::send [IP: 0000] ####
#### System.Net.Sockets.Socket::Send [IP: 0018] ####
#### System.Net.Sockets.Socket::Send [IP: 0010] ####
#### TestNetduino.Program::ConfigureSockets [IP: 003d] ####
#### TestNetduino.Program::Main [IP: 0008] ####
#### SocketException ErrorCode = 10055
#### SocketException ErrorCode = 10055
A first chance exception of type 'System.Net.Sockets.SocketException' occurred in Microsoft.SPOT.Net.dll
#### SocketException ErrorCode = 10055
An unhandled exception of type 'System.Net.Sockets.SocketException' occurred in Microsoft.SPOT.Net.dll


thought trying same example between two windows application no problems happned why is that ?

[Nobby]

The first thing to change on the PC end is your calls to Socket.Recieve(). Since you aren't specifying how much data to read on each call, it will try to read enough data to fill the array and will block until it does unless

• You close the socket
• Have a ReadTimeout value set on the socket

Either way, an exception will be thrown on the PC application. Make the buffer smaller to match the length of the data or provide an amount to read. In your case, the PC application will try to read 1000 bytes all-up.

On the Netduino side of things, I never simply use Socket.Send(). I always tell it was data range to use from the array so that I know I have full control over safe execution. This doesn't mean that the Netduino exception is being caused by this.

[Nart Schinackow]

The first thing to change on the PC end is your calls to Socket.Recieve(). Since you aren't specifying how much data to read on each call, it will try to read enough data to fill the array and will block until it does unless

• You close the socket
• Have a ReadTimeout value set on the socket

Either way, an exception will be thrown on the PC application. Make the buffer smaller to match the length of the data or provide an amount to read. In your case, the PC application will try to read 1000 bytes all-up.

On the Netduino side of things, I never simply use Socket.Send(). I always tell it was data range to use from the array so that I know I have full control over safe execution. This doesn't mean that the Netduino exception is being caused by this.

Hello Nobby ,
Thanks for the reply i changed the netduino code to the following :

SOCK = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            SOCK.Bind(END_POINT);
            SOCK.Listen(1);
            byte[] s=UTF8Encoding.UTF8.GetBytes("nart schinackow");
            while (true)
            {
                ACCP_SOCK = SOCK.Accept();
                for (byte i = 0; i < 10; i++)
                    ACCP_SOCK.Send(s, i, 1, SocketFlags.None);
                ACCP_SOCK.Close();
            }

and pc code to the following

 Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            sock.Connect(new IPEndPoint(IPAddress.Parse("192.168.15.5"), 90));
            byte[] r = new byte[1];
            for (int i = 0; i < 10; i++)
            {
                sock.Receive(r, 0, 1, SocketFlags.None);
            }
            sock.Close();

still the exception appears!!