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package de.thedevstack.conversationsplus.utils;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.nio.ByteBuffer;
import de.thedevstack.conversationsplus.Config;
public class SocksSocketFactory {
public static void createSocksConnection(Socket socket, String destination, int port) throws IOException {
InputStream proxyIs = socket.getInputStream();
OutputStream proxyOs = socket.getOutputStream();
proxyOs.write(new byte[]{0x05, 0x01, 0x00});
byte[] response = new byte[2];
proxyIs.read(response);
byte[] dest = destination.getBytes();
ByteBuffer request = ByteBuffer.allocate(7 + dest.length);
request.put(new byte[]{0x05, 0x01, 0x00, 0x03});
request.put((byte) dest.length);
request.put(dest);
request.putShort((short) port);
proxyOs.write(request.array());
response = new byte[7 + dest.length];
proxyIs.read(response);
if (response[1] != 0x00) {
throw new SocksConnectionException();
}
}
public static Socket createSocket(InetSocketAddress address, String destination, int port) throws IOException {
Socket socket = new Socket();
try {
socket.connect(address, Config.CONNECT_TIMEOUT * 1000);
} catch (IOException e) {
throw new SocksProxyNotFoundException();
}
createSocksConnection(socket, destination, port);
return socket;
}
static class SocksConnectionException extends IOException {
}
public static class SocksProxyNotFoundException extends IOException {
}
}
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