Examples with I2NPMessageException net.i2p.data.i2np.I2NPMessageException used on opensource projects

Example 1 with I2NPMessageException

use of net.i2p.data.i2np.I2NPMessageException in project i2p.i2p by i2p.

the class MessageReceiver method readMessage.

/**
 *  Assemble all the fragments into an I2NP message.
 *  This calls state.releaseResources(), do not access state after calling this.
 *
 *  @param buf temp buffer for convenience
 *  @return null on error
 */
private I2NPMessage readMessage(ByteArray buf, InboundMessageState state, I2NPMessageHandler handler) {
    try {
        // byte buf[] = new byte[state.getCompleteSize()];
        I2NPMessage m;
        int numFragments = state.getFragmentCount();
        if (numFragments > 1) {
            ByteArray[] fragments = state.getFragments();
            int off = 0;
            for (int i = 0; i < numFragments; i++) {
                System.arraycopy(fragments[i].getData(), 0, buf.getData(), off, fragments[i].getValid());
                // if (_log.shouldLog(Log.DEBUG))
                // _log.debug("Raw fragment[" + i + "] for " + state.getMessageId() + ": "
                // + Base64.encode(fragments[i].getData(), 0, fragments[i].getValid())
                // + " (valid: " + fragments[i].getValid()
                // + " raw: " + Base64.encode(fragments[i].getData()) + ")");
                off += fragments[i].getValid();
            }
            if (off != state.getCompleteSize()) {
                if (_log.shouldLog(Log.WARN))
                    _log.warn("Hmm, offset of the fragments = " + off + " while the state says " + state.getCompleteSize());
                return null;
            }
            // if (_log.shouldLog(Log.DEBUG))
            // _log.debug("Raw byte array for " + state.getMessageId() + ": " + HexDump.dump(buf.getData(), 0, state.getCompleteSize()));
            m = I2NPMessageImpl.fromRawByteArray(_context, buf.getData(), 0, state.getCompleteSize(), handler);
        } else {
            // zero copy for single fragment
            m = I2NPMessageImpl.fromRawByteArray(_context, state.getFragments()[0].getData(), 0, state.getCompleteSize(), handler);
        }
        m.setUniqueId(state.getMessageId());
        return m;
    } catch (I2NPMessageException ime) {
        if (_log.shouldLog(Log.WARN)) {
            ByteArray ba;
            if (state.getFragmentCount() > 1)
                ba = buf;
            else
                ba = state.getFragments()[0];
            byte[] data = ba.getData();
            _log.warn("Message invalid: " + state + " PeerState: " + _transport.getPeerState(state.getFrom()) + "\nDUMP:\n" + HexDump.dump(data, 0, state.getCompleteSize()) + "\nRAW:\n" + Base64.encode(data, 0, state.getCompleteSize()), ime);
        }
        if (state.getFragments()[0].getData()[0] == DatabaseStoreMessage.MESSAGE_TYPE) {
            PeerState ps = _transport.getPeerState(state.getFrom());
            if (ps != null && ps.getRemotePort() == 65520) {
                // distinct port of buggy router
                _transport.sendDestroy(ps);
                _transport.dropPeer(ps, true, "Corrupt DSM");
                _context.banlist().banlistRouterForever(state.getFrom(), _x("Sent corrupt DSM"));
            }
        }
        _context.messageHistory().droppedInboundMessage(state.getMessageId(), state.getFrom(), "error: " + ime.toString() + ": " + state.toString());
        return null;
    } catch (RuntimeException e) {
        // e.g. AIOOBE
        if (_log.shouldLog(Log.WARN))
            _log.warn("Error handling a message: " + state, e);
        _context.messageHistory().droppedInboundMessage(state.getMessageId(), state.getFrom(), "error: " + e.toString() + ": " + state.toString());
        return null;
    } finally {
        state.releaseResources();
    }
}

Example 2 with I2NPMessageException

use of net.i2p.data.i2np.I2NPMessageException in project i2p.i2p by i2p.

the class FragmentHandler method receiveComplete.

private void receiveComplete(FragmentedMessage msg) {
    if (msg == null)
        return;
    _completed++;
    String stringified = null;
    if (_log.shouldLog(Log.DEBUG))
        stringified = msg.toString();
    byte[] data = null;
    try {
        int fragmentCount = msg.getFragmentCount();
        // toByteArray destroys the contents of the message completely
        data = msg.toByteArray();
        if (data == null)
            // fragments already released???
            throw new I2NPMessageException("null data");
        if (_log.shouldLog(Log.DEBUG))
            // + Base64.encode(data)
            _log.debug("RECV(" + data.length + "): ");
        // + " " + _context.sha().calculateHash(data).toBase64());
        // TODO read in as unknown message for outbound tunnels,
        // since this will just be packaged in a TunnelGatewayMessage.
        // Not a big savings since most everything is a GarlicMessage
        // and so the readMessage() call is fast.
        // The unencrypted messages at the OBEP are (V)TBMs
        // and perhaps an occasional DatabaseLookupMessage
        I2NPMessage m = new I2NPMessageHandler(_context).readMessage(data);
        // + msg.toString());
        noteReception(m.getUniqueId(), fragmentCount - 1, "complete: ");
        noteCompletion(m.getUniqueId());
        _receiver.receiveComplete(m, msg.getTargetRouter(), msg.getTargetTunnel());
    } catch (I2NPMessageException ime) {
        if (stringified == null)
            stringified = msg.toString();
        if (_log.shouldLog(Log.WARN)) {
            _log.warn("Error receiving fragmented message (corrupt?): " + stringified, ime);
            _log.warn("DUMP:\n" + HexDump.dump(data));
            _log.warn("RAW:\n" + Base64.encode(data));
        }
    }
}

Example 3 with I2NPMessageException

use of net.i2p.data.i2np.I2NPMessageException in project i2p.i2p by i2p.

the class FragmentHandler method receiveComplete.

/**
 *  Zero-copy reception of an unfragmented message
 *  @since 0.9
 */
private void receiveComplete(byte[] data, int offset, int len, Hash router, TunnelId tunnelId) {
    _completed++;
    try {
        if (_log.shouldLog(Log.DEBUG))
            _log.debug("RECV unfrag(" + len + ')');
        // TODO read in as unknown message for outbound tunnels,
        // since this will just be packaged in a TunnelGatewayMessage.
        // Not a big savings since most everything is a GarlicMessage
        // and so the readMessage() call is fast.
        // The unencrypted messages at the OBEP are (V)TBMs
        // and perhaps an occasional DatabaseLookupMessage
        I2NPMessageHandler h = new I2NPMessageHandler(_context);
        h.readMessage(data, offset, len);
        I2NPMessage m = h.lastRead();
        // + msg.toString());
        noteReception(m.getUniqueId(), 0, "complete: ");
        noteCompletion(m.getUniqueId());
        _receiver.receiveComplete(m, router, tunnelId);
    } catch (I2NPMessageException ime) {
        if (_log.shouldLog(Log.WARN)) {
            _log.warn("Error receiving unfragmented message (corrupt?)", ime);
            _log.warn("DUMP:\n" + HexDump.dump(data, offset, len));
            _log.warn("RAW:\n" + Base64.encode(data, offset, len));
        }
    }
}

Example 4 with I2NPMessageException

use of net.i2p.data.i2np.I2NPMessageException in project i2p.i2p by i2p.

the class TunnelGatewayZeroHop method add.

/**
 * Add a message to be sent down the tunnel, where we are the inbound gateway.
 * This requires converting the message included in the TGM from an
 * UnknownI2NPMessage to the correct message class.
 * See TunnelGatewayMessage for details.
 *
 * @param msg message received to be sent through the tunnel
 */
@Override
public void add(TunnelGatewayMessage msg) {
    I2NPMessage imsg = msg.getMessage();
    if (_config.isInbound()) {
        if (imsg instanceof UnknownI2NPMessage) {
            // Do the delayed deserializing - convert to a standard message class
            try {
                UnknownI2NPMessage umsg = (UnknownI2NPMessage) imsg;
                imsg = umsg.convert();
            } catch (I2NPMessageException ime) {
                if (_log.shouldLog(Log.WARN))
                    _log.warn("Unable to convert to std. msg. class at zero-hop IBGW", ime);
                return;
            }
        }
    }
    add(imsg, null, null);
}