Receive a 4-byte Length Prefix from a Socket

See more Socket/SSL/TLS Examples

Demonstrates Socket.ReceiveCount, which reads a four-byte length prefix as a signed 32-bit integer. A return value of -1 indicates failure.

#include <CkSocketW.h>

void ChilkatSample(void)
    {
    bool success = false;

    CkSocketW socket;

    //  Connect to the server using TLS.
    bool bTls = true;
    int maxWaitMs = 5000;
    success = socket.Connect(L"example.com",5000,bTls,maxWaitMs);
    if (success == false) {
        wprintf(L"%s\n",socket.lastErrorText());
        return;
    }

    //  Read a four-byte length prefix as a signed 32-bit integer (network byte order by default).  A
    //  return value of -1 indicates failure.
    int messageLength = socket.ReceiveCount();
    if (messageLength < 0) {
        wprintf(L"%s\n",socket.lastErrorText());
        return;
    }

    wprintf(L"The peer will send %d bytes.\n",messageLength);
    }