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(C) TCP Socket Send Byte and Receive ByteDemonstrates the Chilkat Socket ReceiveByte and SendByte method.
#include <C_CkSocket.h> void ChilkatSample(void) { HCkSocket sock; BOOL useTls; int port; int maxWaitMs; BOOL success; BOOL treatAsUnsignedInt; // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. sock = CkSocket_Create(); // -------------------------------------------------------------------- // This example uses the public TCP echo service at https://tcpbin.com/ // -------------------------------------------------------------------- useTls = FALSE; port = 4242; maxWaitMs = 5000; success = CkSocket_Connect(sock,"tcpbin.com",port,useTls,maxWaitMs); if (success == FALSE) { printf("%s\n",CkSocket_lastErrorText(sock)); CkSocket_Dispose(sock); return; } // Wait a max of 2 seconds for a response.. CkSocket_putMaxReadIdleMs(sock,2000); // Send a byte. CkSocket_SendByte(sock,96); // The tcpbin.com echo server only echoes after receiving an LF (linefeed char) CkSocket_SendByte(sock,10); // The echo server will echo back whatever is sent to it. // We should be able to read the same byte back.. // After successfully reading, the byte value is available in the ReceivedInt property. treatAsUnsignedInt = TRUE; success = CkSocket_ReceiveByte(sock,treatAsUnsignedInt); if (success == FALSE) { printf("%s\n",CkSocket_lastErrorText(sock)); CkSocket_Dispose(sock); return; } // Let's look at the value of the byte received. It should be 96. printf("%d\n",CkSocket_getReceivedInt(sock)); // The echo server also echoed the LF back. success = CkSocket_ReceiveByte(sock,treatAsUnsignedInt); // Assuming success.. // Should be decimal 10. printf("%d\n",CkSocket_getReceivedInt(sock)); CkSocket_Dispose(sock); } |
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