/**
* WTFPL
* Version 2, December 2004
*
* Copyright (C) sponge
* Planet Earth
*
* See...
*
* http://sam.zoy.org/wtfpl/
* and
* http://en.wikipedia.org/wiki/WTFPL
*
* ...for any additional details and license questions.
*/
package net.i2p.BOB.Demos.echo.echoserver;
import java.io.BufferedOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
*
* @author sponge
*/
public class Main {
public static String Lread(InputStream in) throws IOException {
String S;
int b;
char c;
S = new String();
while(true) {
b = in.read();
if(b < 20) {
break;
}
c = (char)(b & 0x7f); // We only care about ASCII
S = new String(S + c);
}
return S;
}
/**
* Check for "ERROR" and if so, throw RuntimeException
* @param line
* @throws java.lang.RuntimeException
*/
static void checkline(String line) throws RuntimeException {
System.out.println(line); // print status
if(line.startsWith("ERROR")) {
throw new RuntimeException(line);
}
}
static void wrtxt(OutputStream CMDout, String s) throws IOException {
CMDout.write(DataHelper.getUTF8(s));
CMDout.write('\n');
CMDout.flush();
}
static void setupconn(String[] args) throws UnknownHostException, IOException, RuntimeException {
String line;
Socket CMDsock = new Socket("localhost", 0xB0B);
InputStream CMDin = CMDsock.getInputStream();
OutputStream CMDout = CMDsock.getOutputStream();
// setup the tunnel.
line = Lread(CMDin);
System.out.println(line); // print the banner
line = Lread(CMDin);
System.out.println(line); // print initial status, should always be "OK"
try {
wrtxt(CMDout, "status " + args[2]);
line =Lread(CMDin); // get the status of this nickname, if it's an error, create it
checkline(line);
} catch(RuntimeException rte) {
wrtxt(CMDout, "setnick " + args[2]);
line =Lread(CMDin); // create a new nickname
checkline(line);
wrtxt(CMDout, "newkeys ");
line =Lread(CMDin); // set up new keys
checkline(line);
wrtxt(CMDout, "outport " + args[1]);
line = Lread(CMDin); // set the port we connect out on
checkline(line);
}
wrtxt(CMDout, "getnick " + args[2]);
line = Lread(CMDin); // Set to our nick
checkline(line);
wrtxt(CMDout, "start ");
line = Lread(CMDin); // an error here is OK
System.out.println(line); // print status
CMDsock.close(); // we no longer need this particular socket
}
static void deleteconn(String[] args) throws UnknownHostException, IOException, RuntimeException {
String line;
Socket CMDsock = new Socket("localhost", 0xB0B);
InputStream CMDin = CMDsock.getInputStream();
OutputStream CMDout = CMDsock.getOutputStream();
// delete the tunnel.
line = Lread(CMDin);
System.out.println(line); // print the banner
line = Lread(CMDin);
System.out.println(line); // print initial status, should always be "OK"
wrtxt(CMDout, "getnick " + args[2]); // Set to our nick
line = Lread(CMDin);
checkline(line);
wrtxt(CMDout, "stop");
line = Lread(CMDin);
checkline(line);
try {
Thread.sleep(2000); //sleep for 2000 ms (Two seconds)
} catch(Exception e) {
// nop
}
wrtxt(CMDout, "clear");
line = Lread(CMDin);
while(line.startsWith("ERROR")) {
wrtxt(CMDout, "clear");
line = Lread(CMDin);
}
System.out.println(line); // print status
CMDsock.close(); // we no longer need this particular socket
}
static void chatter(Socket sock) throws UnknownHostException, IOException, RuntimeException {
String line;
InputStream in = sock.getInputStream();
OutputStreamWriter out = new OutputStreamWriter(new BufferedOutputStream(sock.getOutputStream()));
line = Lread(in); // get remote I2P address
System.out.println("Connect from: " + line); // show user
out.write("Hello, You are connecting from " + line + "\n"); // send greeting
out.flush(); // make sure it's sent.
line = Lread(in); // get test text from client
System.out.println("Got "+line); // show user
sock.close(); // done.
}
private static void serverlistener(String[] args) throws UnknownHostException, IOException, RuntimeException {
ServerSocket listener = new ServerSocket(Integer.parseInt(args[1]), 10, InetAddress.getByName("localhost"));
Socket server;
while(true) {
server = listener.accept();
chatter(server);
}
}
/**
*
* @param args tunnelport tunnelnickname
*/
public static void main(String[] args) {
// I'm lazy, and want to exit on any failures.
try {
setupconn(args); // talk to BOB, set up an inbound port
serverlistener(args); // talk over the connection
} catch(UnknownHostException ex) {
Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
} catch(IOException ex) {
Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
}
try {
deleteconn(args);
} catch(UnknownHostException ex) {
Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
} catch(IOException ex) {
Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
} catch(RuntimeException ex) {
Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
}
}
}