Alternating Winsock Chat

// Created by Phillip D. Hopkins
// of Philware Inc.
// sites
// www.philwareinc.com (soon to be launched)
// www.philwareinc.20m.com (already up)
#include <iostream.h>
#include <winsock.h>
void ClearScreen();	//A VERY cheap and fake "Clear Screen" function
int DisplayMenu()	//A simple function to display the menu and get the response
{
	int choice;
beginning:
	ClearScreen();
	cout << endl << endl << endl << endl << endl << endl << endl << "Philware WINSOCK Test V1.0" << endl;
	cout << "Choose the correct Connection Type:" << endl;
	cout << "1. Server" << endl;
	cout << "2. Client" << endl;
	cout << "3. Exit" << endl;
	cout << "Choice: ";
	cin >> choice;
	if (choice != 1 && choice != 2 && choice != 3)
	{
		cout << "That is not one of the choices." << endl;
		goto beginning;
	}
	return choice;
}
int main()
{
	WSADATA WsaDat;				//Declares what is necessary to use winsock
	int menuchoice;				//Gets the integer from the "DisplayMenu()" function
	if (WSAStartup(MAKEWORD(1,1), &WsaDat) != 0)	//Initiallizes the WSA
	{
		cout << "WSA initialization failed.";
		cout << "Closing. . .";
		Sleep(MAKEWORD(10,30));
		goto end;
	}
	SOCKET mysocket;			//Our Handy Dandy Socket
	mysocket = socket(AF_INET, SOCK_STREAM, 0);		//Sets the properties of our socket
													//Here, it is set to a STREAM Socket
	
	if (mysocket == INVALID_SOCKET)					//Checks to see if it created correctly
	{
		cout << "Socket creation failed!";
		cout << "Closing. . .";
		Sleep(MAKEWORD(10,30));
		goto end;
	}
	int ip1, ip2, ip3, ip4, yesno;					//Holders for IP address, and a
													//"yesno" var for confirmation later
reipadd:	//Yah, I know it is bad, but I did use a nasty "goto" command
	cout << "\nChoose your IP address:\n";			//It has you enter the server's
	cout << "first numeral: ";						//IP address one numeral at a time
	cin >> ip1;
	cout << "second numeral:";
	cin >> ip2;
	cout << "third numeral: ";
	cin >> ip3;
	cout << "fourth numeral:";
	cin >> ip4;
	cout << "\nIs this your IP address? (1=yes, 2=no)\n" << ip1 << "." << ip2 << "." << ip3 << "." << ip4 << endl;
	cin >> yesno;				//this just shows the ip and ask for verification
	if (yesno!=1)
	{
		goto reipadd;			//here is that nasty "goto" command. . .
	}
	SOCKADDR_IN SockAddr;		//this keeps track of the socket's address info
	SockAddr.sin_port = 50;
	SockAddr.sin_family = AF_INET;
	SockAddr.sin_addr.S_un.S_un_b.s_b1 = ip1;
	SockAddr.sin_addr.S_un.S_un_b.s_b2 = ip2;
	SockAddr.sin_addr.S_un.S_un_b.s_b3 = ip3;
	SockAddr.sin_addr.S_un.S_un_b.s_b4 = ip4;
	char myscreenname[20], theirscreenname[20];	// self-explanatory :)
rescreenname:	//another reference to that "goto" command
	//lets you enter a screen name
	cout << endl << "Type in a one-word \"Screen Name\" less than 20 letters" << endl;
	cin.ignore(80, '\n');
	cin.get(myscreenname, 20);
	cin.ignore(80, '\n');
	//checks to see if you typed it right
	cout << "Your screen name is :" << myscreenname << endl << "Do you want this screen name?(1=yes 2=no)" << endl;
	cin >> yesno;
	if (yesno!=1)
	{
		goto rescreenname; //yup, this will have you retype the screen name
	}
	
	
	menuchoice=DisplayMenu();	//shows the menu and gets a choice (defined at top of code)
	
	if (menuchoice==1)			// if you chose to be a server. . . 
	{
								// bind to IP address. . .
		if (bind(mysocket, (SOCKADDR *)(&SockAddr), sizeof(SockAddr)) == SOCKET_ERROR)
		{
			cout << "Attempt to bind failed" << endl;
			cout << "Closing. . .";
			Sleep(MAKEWORD(10,30));
			goto end;
		}
		
		cout << "Waiting for client. . ." << endl;
								//go into "Listen" mode. . .
		listen(mysocket, 1);
								//when request received to connect, accept it
		SOCKET TempSock = SOCKET_ERROR;
		while (TempSock == SOCKET_ERROR)
		{
			TempSock = accept(mysocket, NULL, NULL);
		}
		mysocket = TempSock;
								//send your screen name to the client
		cout << "Client Found. Sending screen name. . ." << endl;
		send(mysocket, myscreenname, sizeof(myscreenname), 0);
		cout << "Screen name sent successfully." << endl;
		cout << "Retrieving screen name from client. . ." << endl;
								//wait to receive screen name from client
		int WaitforScreenName = SOCKET_ERROR;
		while (WaitforScreenName == SOCKET_ERROR)
		{
			WaitforScreenName = recv(mysocket, theirscreenname, 20, 0);
			if ((WaitforScreenName == 0)||(WaitforScreenName == WSAECONNRESET))
			{
				cout << "Connection closed at the other end while receiving screen name! RATS!" << endl;
				cout << "Closing. . .";
				Sleep(MAKEWORD(10,30));
				goto end;
			}
		cout << "Screen Name Acquired. You are talking with: " << theirscreenname << endl;
		}
		
		char toclient[50], String2[50];
		int RetVal = SOCKET_ERROR;
send1:							//type and send message to client
		cout << myscreenname << ": ";
		cin.ignore(80, '\n');
		cin.get(toclient, 50);
		cin.ignore(80, '\n');
		send(mysocket, toclient, 50, 0);
//		cout << "MESSAGE SENT" << endl << "Waiting for reply. . ." << endl;
								//wait for the client to send a message. . .
		while (RetVal == SOCKET_ERROR)
		{
			RetVal = recv(mysocket, String2, 50, 0);
			if ((RetVal == 0)||(RetVal == WSAECONNRESET))
			{
				cout << "Connection closed at the other end. . .Sorry. . ." << endl;
				cout << "Closing. . .";
				Sleep(MAKEWORD(10,30));
				goto end;
			}
								//display message
//			cout << "Message Received:" << endl;
			cout << theirscreenname << ": " << String2 << endl;
			RetVal = SOCKET_ERROR;
			goto send1;			// loop and send another message
		}
		
//		cout << "\nThis message was sent:" << endl;
//		cout << "THIS IS FROM THE SERVER, TEST SUCCESSFUL";
//		int pause;
//		cin >> pause;
	}
	else if (menuchoice==2)
	{
								//attempt to connect to server. . .
		cout << "Trying to connect to a server. . ." << endl;
		if (connect(mysocket, (SOCKADDR *)(&SockAddr), sizeof(SockAddr)) == SOCKET_ERROR)
		{
			cout << "failed to establish connection with server" << endl;
			cout << "Closing. . .";
			Sleep(MAKEWORD(10,30));
			goto end;
		}
								//wait to receive screen name
		cout << "Server Found! Waiting to receive Screen Name. . ." << endl;
		int WaitforScreenName = SOCKET_ERROR;
		while (WaitforScreenName == SOCKET_ERROR)
		{
			WaitforScreenName = recv(mysocket, theirscreenname, 20, 0);
			if ((WaitforScreenName == 0)||(WaitforScreenName == WSAECONNRESET))
			{
				cout << "Connection closed at the other end while receiving screen name!" << endl;
				cout << "Closing. . .";
				Sleep(MAKEWORD(10,30));
				goto end;
			}
		cout << "Screen Name Acquired. You are talking with: " << theirscreenname << endl;
		
								//send screen name to server
		cout << "Sending your screen name. . ." << endl;
		send(mysocket, myscreenname, sizeof(myscreenname), 0);
		cout << "Screen Name Sent!" << endl;
		
								//wait for message from server
		cout << "Waiting for first Message from " << theirscreenname << ". . ." << endl;
		}

		int RetVal = SOCKET_ERROR;
		char String[50], toserver[50];
send2:
		while (RetVal == SOCKET_ERROR)
		{
			RetVal = recv(mysocket, String, 50, 0);
			if ((RetVal == 0)||(RetVal == WSAECONNRESET))
			{
				cout << "Connection closed at the other end" << endl;
				cout << "Closing. . .";
				Sleep(MAKEWORD(10,30));
				goto end;
			}
			
//			cout << "Message Received:" << endl;
			cout << theirscreenname << ": " << String << endl;
//			int pause1;
//			cout << "\nThis message was received:" << endl;
//			cout << String;
//			cin >> pause1;
		}
		
								//type and send message to server
		cout << myscreenname << ": ";
		cin.ignore(80, '\n');
		cin.get(toserver, 50);
		cin.ignore(80, '\n');
//		cout << "Sending message. . ." << endl;
		send(mysocket, toserver, 50, 0);
//		cout << "Message Sent. Waiting for reply from " << theirscreenname << ". . ." << endl;
		RetVal = SOCKET_ERROR;
		goto send2;				//loop back and wait for another message
	}
	else if (menuchoice==3)
	{
								//close the program
		cout << "Closing. . .";
		Sleep(MAKEWORD(10,30));
		goto end;
	}
		
end:
	return 0;
}
void ClearScreen()				//Here be the cheesy "Screen Clear" function
{
	cout << "\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n";
}