//***************************************************************
// From the book "Win32 System Services: The Heart of Windows 98
// and Windows 2000"
// by Marshall Brain
// Published by Prentice Hall
//
// Copyright 1995, by Prentice Hall.
//
// This code implements a simple named pipe sender.
//***************************************************************

// ssnpsend.cpp

// Usage: ssnpsend

#include <windows.h>
#include <iostream.h>

int main()
{
  char *toSendtxt="Test String";
  HANDLE ssnpPipe;
  DWORD NumBytesWritten;
  char machineName[80];
  char pipeName[80];

  cout << "Enter name of server machine: ";
  cin >> machineName;
  wsprintf(pipeName, "\\\\%s\\pipe\\ssnp", 
    machineName);

  /* Create the named pipe file handle for sending
     messages */
  ssnpPipe=CreateFile(pipeName,
    GENERIC_WRITE, FILE_SHARE_READ,
    (LPSECURITY_ATTRIBUTES) NULL,
    OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL,
    (HANDLE) NULL);

  /* Check and see if the named pipe file was
     opened, if not terminate program */
  if (ssnpPipe == INVALID_HANDLE_VALUE)
  {
    cerr << "ERROR: Unable to create a named pipe"
      << endl;
    cerr << GetLastError() << endl;
    return (1);
  }

  /* Repeatedly send message until program is
     terminated */
  while(1)
  {
    cout << "Sending..." << endl;
    /* Write message to the pipe */
    if (!WriteFile(ssnpPipe,
          toSendtxt, (DWORD) strlen(toSendtxt)+1,
          &NumBytesWritten, (LPOVERLAPPED) NULL))
    {
      /* If error occurs when writing to named
         pipe, terminate program */
      cerr << "ERROR: Unable to write to named pipe"
        << endl;
      CloseHandle(ssnpPipe);
      return (1);
    }

    /* Wait before sending the message again */
    Sleep(4800);
  } /* while*/
}