Thread: Limit number of chars per IP

Sorry about some of the formatting....

Purpose: To limit the number of characters people are able to create per IP, to reduce number of chars in your folder by checking the number of chars on login.

Difficulty: 1-3/10, depends

Assumed Knowledge: basic java, ability to read, ctrl+f

Server Base: old cheezescape, should work on all

Classes Modified: client.java

Procedure
Step 1: First, create a new folder inside of your server folder called "IPs"

Step 2: Now open client.java and declare these

Code:

public int numChars = 0; // number of chars saved in the file
public static boolean killIt = false; // force disconnect?
public boolean newChar = false; // is the player making a new char?

//check the number of chars in the IP file
public void checkipfiles()
	{
		try
		{
			BufferedReader in = new BufferedReader(new FileReader("IPs/"+connectedFrom+".txt"));
			String data = null;
			boolean charSaved = false;
			numChars = 0;
			while ((data = in.readLine()) != null)
			{
				numChars++;
				if (data.matches(playerName))
					charSaved = true; // is this players char saving in the IP file?
			}
			if (!charSaved && !newChar) { // if the char is not saved, save it, then count again
				saveIP();
				System.out.println(playerName+": char not saved to IP file! Saving.");
				checkipfiles();
			}
		}
		catch (IOException e) // error handling, file not found
		{
			System.out.println("Error when checking IP files: IP file not found.");
			saveIP();
		}
	}
public void saveIP() { // save the char to the player's IP file
		BufferedWriter bw = null;
		
      	try {
        	bw = new BufferedWriter(new FileWriter("IPs/"+connectedFrom+".txt", true)); // print the name in the player's IP.txt
	 	bw.write(playerName);
	 	bw.newLine();
	 	bw.flush();
      	} catch (IOException ioe) {
	 	System.out.println("Exception: File not found. File created.");
      	} finally {
	 	if (bw != null) try {
	    		bw.close();
	 		} catch (IOException ioe2) {
	    		sendMessage("Error logging IP file!");
	 		}
      	}
}

Step 3: Now, we need to make it so upon login, it calls these.
Search

Code:

public int loadGame(String playerName, String playerPass) {

then inside that method find

Code:

misc.println(playerName+": character file not found.");

You should see something like

Code:

} else if (File1 == false && File2 == false) {
			misc.println(playerName+": character file not found.");
			return 3;
		}

Change all that to

Code:

} else if (!(File1 || File2)) {
			misc.println(playerName+": char ip not recorded.");
			newChar = true;
			checkipfiles(); // see how many chars are saved in the file
			if (numChars < 3) saveIP(); // if there's less than 3 chars, save
			if (numChars >= 3) { // if there's more than 3, disconnect it
				killIt = true;
				misc.println(playerName+": too many chars, disconnecting it.");
			}
			misc.println(playerName+": character file not found.");
			return 3;
		}

Step 3: Finally, we need to be sure that the players get kicked before being saved if they have >= 3 chars.
Find

Code:

public boolean process() {		// is being called regularily every 500ms

and inside it add

Code:

//kick users before file saves if they have too many in the ip log.
	if (killIt) {
		logout();
	}

That should be it, post errors.

Also, If you wish to tell people when they have reached the max number of chars in the IP file, find your login message towards the bottom of

Code:

public void initialize()

and add

Code:

checkipfiles();
if (numChars >= 3) {
sendMessage("WARNING: You cannot make any new chars on this IP! You have used up all available slots.");
}

Credits: 100% me, tj007razor

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