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(.NET Core C#) Socket Send/Receive 16-bit IntegersDemonstrates sending and receiving 16-bit integers over a socket connection using either big-endian or little-endian byte ordering.
// This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. Chilkat.Socket sock = new Chilkat.Socket(); // -------------------------------------------------------------------- // This example uses the public TCP echo service at https://tcpbin.com/ // -------------------------------------------------------------------- bool useTls = false; int port = 4242; int maxWaitMs = 5000; bool success = sock.Connect("tcpbin.com",port,useTls,maxWaitMs); if (success == false) { Debug.WriteLine(sock.LastErrorText); return; } // Wait a max of 2 seconds for a response.. sock.MaxReadIdleMs = 2000; // Send a 16-bit integer using big-endian byte ordering (also called network byte order) // 12022 decimal = 2EF6 hex int value = 12022; bool bigEndian = true; sock.SendInt16(value,bigEndian); // Send it again, because we'll read it two different ways.. sock.SendInt16(value,bigEndian); // The tcpbin.com echo server only echoes after receiving an LF (linefeed char) sock.SendByte(10); // Let's see hex values of the 2 bytes sent in network byte order (big-endian) // (The echo server sends back exactly the bytes received.) string hexStr = sock.ReceiveNBytesENC(2,"hex"); // In the big-ending byte order, the byte order is most significant byte to least significant, // therefore we should see the bytes in the order 0x2E 0xF6. Debug.WriteLine("Expecting big-endian 2EF6"); Debug.WriteLine(hexStr); // Let's read directly to an integer.. success = sock.ReceiveInt16(bigEndian,true); Debug.WriteLine("Expecting 12022"); Debug.WriteLine("Received: " + Convert.ToString(sock.ReceivedInt)); // Consume the LF that gets echoed back.. sock.ReceiveByte(true); // -------------------------------------------------------------------- // Let's do the same thing, but with little-endian byte ordering. Debug.WriteLine("----"); // 12022 decimal = 2EF6 hex, but little-endian byte ordering will send the bytes in the order 0xF6 0x2E value = 12022; bigEndian = false; sock.SendInt16(value,bigEndian); sock.SendInt16(value,bigEndian); sock.SendByte(10); hexStr = sock.ReceiveNBytesENC(2,"hex"); Debug.WriteLine("Expecting little-endian F62E"); Debug.WriteLine(hexStr); success = sock.ReceiveInt16(bigEndian,true); Debug.WriteLine("Expecting 12022"); Debug.WriteLine("Received: " + Convert.ToString(sock.ReceivedInt)); // Consume the LF that gets echoed back.. sock.ReceiveByte(true); sock.Close(1000); // Output: // Expecting big-endian 2EF6 // 2EF6 // Expecting 12022 // Received: 12022 // ---- // Expecting little-endian F62E // F62E // Expecting 12022 // Received: 12022 |
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