Examples with SOCKSException net.i2p.socks.SOCKSException used on opensource projects

Example 11 with SOCKSException

use of net.i2p.socks.SOCKSException in project i2p.i2p by i2p.

the class SOCKS5Server method handleUDP.

/**
 * We got a UDP associate command.
 * Loop here looking for more, never return normally,
 * or else I2PSocksTunnel will create a streaming lib connection.
 *
 * Do UDP Socks clients actually send more than one Associate request?
 * RFC 1928 isn't clear... maybe not.
 */
private void handleUDP(DataInputStream in, DataOutputStream out) throws SOCKSException {
    List<Integer> ports = new ArrayList<Integer>(1);
    synchronized (_startLock) {
        if (_tunnel == null) {
            // tunnel options?
            _tunnel = new SOCKSUDPTunnel(new I2PTunnel());
            _tunnel.startRunning();
        }
    }
    while (true) {
        // Set it up. connHostName and connPort are the client's info.
        InetAddress ia = null;
        try {
            ia = InetAddress.getByAddress(connHostName, dummyIP);
        }// won't happen, no resolving done here
         catch (UnknownHostException uhe) {
        }
        int myPort = _tunnel.add(ia, connPort);
        ports.add(Integer.valueOf(myPort));
        try {
            sendRequestReply(Reply.SUCCEEDED, AddressType.IPV4, InetAddress.getByName("127.0.0.1"), null, myPort, out);
        } catch (IOException ioe) {
            break;
        }
        // wait for more ???
        try {
            int command = manageRequest(in, out);
            // don't do this...
            if (command != Command.UDP_ASSOCIATE)
                break;
        } catch (IOException ioe) {
            break;
        }
    }
    for (Integer i : ports) _tunnel.remove(i);
    // 
    throw new SOCKSException("End of UDP Processing");
}

Example 12 with SOCKSException

use of net.i2p.socks.SOCKSException in project i2p.i2p by i2p.

the class SOCKS5Server method getDestinationI2PSocket.

/**
 * Get an I2PSocket that can be used to send/receive 8-bit clean data
 * to/from the destination of the SOCKS connection.
 *
 * @return an I2PSocket connected with the destination
 */
public I2PSocket getDestinationI2PSocket(I2PSOCKSTunnel t) throws SOCKSException {
    setupServer();
    if (connHostName == null) {
        _log.error("BUG: destination host name has not been initialized!");
        throw new SOCKSException("BUG! See the logs!");
    }
    if (connPort == 0) {
        _log.error("BUG: destination port has not been initialized!");
        throw new SOCKSException("BUG! See the logs!");
    }
    // for errors
    DataOutputStream out;
    try {
        out = new DataOutputStream(clientSock.getOutputStream());
    } catch (IOException e) {
        throw new SOCKSException("Connection error", e);
    }
    // FIXME: here we should read our config file, select an
    // outproxy, and instantiate the proper socket class that
    // handles the outproxy itself (SOCKS4a, SOCKS5, HTTP CONNECT...).
    I2PSocket destSock;
    try {
        if (connHostName.toLowerCase(Locale.US).endsWith(".i2p")) {
            // Let's not do a new Dest for every request, huh?
            // I2PSocketManager sm = I2PSocketManagerFactory.createManager();
            // destSock = sm.connect(I2PTunnel.destFromName(connHostName), null);
            Destination dest = _context.namingService().lookup(connHostName);
            if (dest == null) {
                try {
                    sendRequestReply(Reply.HOST_UNREACHABLE, AddressType.DOMAINNAME, null, "0.0.0.0", 0, out);
                } catch (IOException ioe) {
                }
                throw new SOCKSException("Host not found");
            }
            if (_log.shouldDebug())
                _log.debug("connecting to " + connHostName + "...");
            Properties overrides = new Properties();
            I2PSocketOptions sktOpts = t.buildOptions(overrides);
            sktOpts.setPort(connPort);
            destSock = t.createI2PSocket(dest, sktOpts);
        } else if ("localhost".equals(connHostName) || "127.0.0.1".equals(connHostName)) {
            String err = "No localhost accesses allowed through the Socks Proxy";
            _log.error(err);
            try {
                sendRequestReply(Reply.CONNECTION_NOT_ALLOWED_BY_RULESET, AddressType.DOMAINNAME, null, "0.0.0.0", 0, out);
            } catch (IOException ioe) {
            }
            throw new SOCKSException(err);
        /**
         **
         *            } else if (connPort == 80) {
         *                // rewrite GET line to include hostname??? or add Host: line???
         *                // or forward to local eepProxy (but that's a Socket not an I2PSocket)
         *                // use eepProxy configured outproxies?
         *                String err = "No handler for HTTP outproxy implemented";
         *                _log.error(err);
         *                try {
         *                    sendRequestReply(Reply.CONNECTION_NOT_ALLOWED_BY_RULESET, AddressType.DOMAINNAME, null, "0.0.0.0", 0, out);
         *                } catch (IOException ioe) {}
         *                throw new SOCKSException(err);
         ***
         */
        } else {
            Outproxy outproxy = getOutproxyPlugin();
            if (outproxy != null) {
                // but here, we wrap a Socket in a I2PSocket and use the regular Runner.
                try {
                    destSock = new SocketWrapper(outproxy.connect(connHostName, connPort));
                } catch (IOException ioe) {
                    try {
                        sendRequestReply(Reply.HOST_UNREACHABLE, AddressType.DOMAINNAME, null, "0.0.0.0", 0, out);
                    } catch (IOException ioe2) {
                    }
                    throw new SOCKSException("connect failed via outproxy plugin", ioe);
                }
            } else {
                List<String> proxies = t.getProxies(connPort);
                if (proxies == null || proxies.isEmpty()) {
                    String err = "No outproxy configured for port " + connPort + " and no default configured either";
                    _log.error(err);
                    try {
                        sendRequestReply(Reply.CONNECTION_NOT_ALLOWED_BY_RULESET, AddressType.DOMAINNAME, null, "0.0.0.0", 0, out);
                    } catch (IOException ioe) {
                    }
                    throw new SOCKSException(err);
                }
                int p = _context.random().nextInt(proxies.size());
                String proxy = proxies.get(p);
                if (_log.shouldLog(Log.DEBUG))
                    _log.debug("connecting to proxy " + proxy + " for " + connHostName + " port " + connPort);
                try {
                    destSock = outproxyConnect(t, proxy);
                } catch (SOCKSException se) {
                    try {
                        sendRequestReply(Reply.HOST_UNREACHABLE, AddressType.DOMAINNAME, null, "0.0.0.0", 0, out);
                    } catch (IOException ioe) {
                    }
                    throw se;
                }
            }
        }
        confirmConnection();
        _log.debug("connection confirmed - exchanging data...");
    } catch (DataFormatException e) {
        if (_log.shouldLog(Log.WARN))
            _log.warn("socks error", e);
        try {
            sendRequestReply(Reply.HOST_UNREACHABLE, AddressType.DOMAINNAME, null, "0.0.0.0", 0, out);
        } catch (IOException ioe) {
        }
        throw new SOCKSException("Error in destination format");
    } catch (IOException e) {
        if (_log.shouldLog(Log.WARN))
            _log.warn("socks error", e);
        try {
            sendRequestReply(Reply.HOST_UNREACHABLE, AddressType.DOMAINNAME, null, "0.0.0.0", 0, out);
        } catch (IOException ioe) {
        }
        throw new SOCKSException("Connection error", e);
    } catch (I2PException e) {
        if (_log.shouldLog(Log.WARN))
            _log.warn("socks error", e);
        try {
            sendRequestReply(Reply.HOST_UNREACHABLE, AddressType.DOMAINNAME, null, "0.0.0.0", 0, out);
        } catch (IOException ioe) {
        }
        throw new SOCKSException("Connection error", e);
    }
    return destSock;
}