//**************************************
//     
// Name: Send a TCP packet to a server
// Description:/* The purpose of this ar
//     ticle is to help out people who know the
//     basics of C but want to start learning T
//     CP controls in C. This program will conn
//     ect to a server and send a TCP packet co
//     ntaining "La la la la". */
// By: Markus Delves
//
// Inputs:usage: program_name <ip add
//     ress> <port>
//
// Returns:The program will tell you if 
//     it was successful or not
//
// Side Effects:None known
//
//This code is copyrighted and has// limited warranties.Please see http://
//     www.Planet-Source-Code.com/xq/ASP/txtCod
//     eId.717/lngWId.3/qx/vb/scripts/ShowCode.
//     htm//for details.//**************************************
//     

int sock;
// Start main with command line argument
//     s

    int main(int argc, char *argv[]) {
    // Get ready for the TCP stuff
    struct hostent *he; // Used for DNS lookup
    struct sockaddr_in blah; // inet addr stuff
    // Create a varible for our packet
    // Remember, TCP packets max at 1024
    char packet[1024];
    // A varible to hold the servers' addres
    //     s
    char *address;
    // A varible for the port
    int port;
    // Extra vars
    int i;
    		// Make sure two arguments were supplied
        		if (argc != 3) {
        		// Print how-to use the program then exit
        		fprintf(stderr, "usage: %s <ip address> <port>\n",argv[0]);
        		return(-1);
        		}	
        		// We know there are two arguments
        		// so let's use them.
        		address = argv[1];
        		port = atoi(argv[2]);
        		// Create the unconnected socket
        		sock = socket (AF_INET, SOCK_STREAM, 0);
        		//Set some settings
        		blah.sin_family = AF_INET; //we're using inet
        		blah.sin_port = htons (port) //set the port
        		he = gethostbyname (address); //set the address
        		fprintf(stderr, "Attempting a connection with %s on port %d\n", address, port);
        		// Is the ip/hostname working?
        		if (!he) 
            		{
            		if ((blah.sin_addr.s_addr = inet.addr (address)) == ADDR_NONE)
            		return(-1);
                		} else {
                		bcopy (he->h_addr, (struct in_addr *) &blah.sin;_addr, he->h_length);
            }

            // Did they accept us?
            if (connect (sock, (struct sockaddr *) &blah;, sizeof
            (blah)) < 0)
                {
                fprintf(stderr, "Connection refused by remote host.\n");
                return(-1);
            }

            //Create the packet
            sprintf(packet, "La la la la");
            //And send it
            write (sock, packet, strlen(packet));
            close (sock); // Close the connection
            fprintf(stderr, "Operation Completed. Exiting...");
        }