Examples with ByteArray net.i2p.data.ByteArray used on opensource projects

Example 36 with ByteArray

use of net.i2p.data.ByteArray in project i2p.i2p by i2p.

the class FragmentedMessage method writeComplete.

/**
 **
 *    public void writeComplete(OutputStream out) throws IOException {
 *        if (_releasedAfter > 0) {
 *             RuntimeException e = new RuntimeException("use after free in FragmentedMessage");
 *             _log.error("FM writeComplete()", e);
 *             throw e;
 *        }
 *        for (int i = 0; i <= _highFragmentNum; i++) {
 *            ByteArray ba = _fragments[i];
 *            out.write(ba.getData(), ba.getOffset(), ba.getValid());
 *        }
 *        _completed = true;
 *    }
 ***
 */
/**
 */
private void writeComplete(byte[] target, int offset) {
    if (_releasedAfter > 0) {
        RuntimeException e = new RuntimeException("use after free in FragmentedMessage");
        _log.error("FM writeComplete() 2", e);
        throw e;
    }
    for (int i = 0; i <= _highFragmentNum; i++) {
        ByteArray ba = _fragments[i];
        System.arraycopy(ba.getData(), ba.getOffset(), target, offset, ba.getValid());
        offset += ba.getValid();
    }
    _completed = true;
}

Example 37 with ByteArray

use of net.i2p.data.ByteArray in project i2p.i2p by i2p.

the class FragmentedMessage method toString.

/**
 **
 *    public InputStream getInputStream() { return new FragmentInputStream(); }
 *    private class FragmentInputStream extends InputStream {
 *        private int _fragment;
 *        private int _offset;
 *        public FragmentInputStream() {
 *            _fragment = 0;
 *            _offset = 0;
 *        }
 *        public int read() throws IOException {
 *            while (true) {
 *                ByteArray ba = _fragments[_fragment];
 *                if (ba == null) return -1;
 *                if (_offset >= ba.getValid()) {
 *                    _fragment++;
 *                    _offset = 0;
 *                } else {
 *                    byte rv = ba.getData()[ba.getOffset()+_offset];
 *                    _offset++;
 *                    return rv;
 *                }
 *            }
 *        }
 *    }
 ***
 */
/**
 * toString
 */
@Override
public String toString() {
    StringBuilder buf = new StringBuilder(128);
    buf.append("Fragments for ").append(_messageId).append(": ");
    for (int i = 0; i <= _highFragmentNum; i++) {
        ByteArray ba = _fragments[i];
        if (ba != null)
            buf.append(i).append(":").append(ba.getValid()).append(" bytes ");
        else
            buf.append(i).append(":missing ");
    }
    buf.append(" highest received: ").append(_highFragmentNum);
    buf.append(" last received? ").append(_lastReceived);
    buf.append(" lifetime: ").append(DataHelper.formatDuration(_context.clock().now() - _createdOn));
    if (_toRouter != null) {
        buf.append(" targetting ").append(_toRouter.toBase64().substring(0, 4));
        if (_toTunnel != null)
            buf.append(":").append(_toTunnel.getTunnelId());
    }
    if (_completed)
        buf.append(" completed");
    if (_releasedAfter > 0)
        buf.append(" released after " + DataHelper.formatDuration(_releasedAfter));
    return buf.toString();
}

Example 38 with ByteArray

use of net.i2p.data.ByteArray in project i2p.i2p by i2p.

the class FragmentedMessage method receive.

/**
 * Receive a followup fragment, though one of these may arrive at the endpoint
 * prior to the fragment # 0.
 *
 * @param fragmentNum sequence number within the message (1 - 63)
 * @param payload data for the fragment non-null
 * @param offset index into the payload where the fragment data starts (past headers/etc)
 * @param length how much past the offset should we snag?
 * @param isLast is this the last fragment in the message?
 */
public boolean receive(int fragmentNum, byte[] payload, int offset, int length, boolean isLast) {
    if (fragmentNum <= 0 || fragmentNum >= MAX_FRAGMENTS) {
        if (_log.shouldLog(Log.WARN))
            _log.warn("Bad followon fragment # == " + fragmentNum + " for messageId " + _messageId);
        return false;
    }
    if (length <= 0 || length > MAX_FRAGMENT_SIZE) {
        if (_log.shouldLog(Log.WARN))
            _log.warn("Length is impossible (" + length + ") for messageId " + _messageId);
        return false;
    }
    if (offset + length > payload.length) {
        if (_log.shouldLog(Log.WARN))
            _log.warn("Length is impossible (" + length + "/" + offset + " out of " + payload.length + ") for messageId " + _messageId);
        return false;
    }
    if (_log.shouldLog(Log.DEBUG))
        _log.debug("Receive message " + _messageId + " fragment " + fragmentNum + " with " + length + " bytes (last? " + isLast + ") offset = " + offset);
    // we should just use payload[] and use an offset/length on it
    // new ByteArray(payload, offset, length); //new byte[length]);
    ByteArray ba = _cache.acquire();
    System.arraycopy(payload, offset, ba.getData(), 0, length);
    ba.setValid(length);
    ba.setOffset(0);
    // System.arraycopy(payload, offset, ba.getData(), 0, length);
    // if (_log.shouldLog(Log.DEBUG))
    // _log.debug("fragment[" + fragmentNum + "/" + offset + "/" + length + "]: "
    // + Base64.encode(ba.getData(), ba.getOffset(), ba.getValid()));
    _fragments[fragmentNum] = ba;
    _lastReceived = _lastReceived || isLast;
    if (fragmentNum > _highFragmentNum)
        _highFragmentNum = fragmentNum;
    if (isLast && fragmentNum <= 0) {
        if (_log.shouldLog(Log.ERROR))
            _log.error("hmm, isLast and fragmentNum=" + fragmentNum + " for message " + _messageId);
        return false;
    }
    return true;
}

Example 39 with ByteArray

use of net.i2p.data.ByteArray in project i2p.i2p by i2p.

the class HashSetIVValidator method receiveIV.

public boolean receiveIV(byte[] ivData, int ivOffset, byte[] payload, int payloadOffset) {
    // if (true) // foo!
    // return true;
    byte[] iv = new byte[HopProcessor.IV_LENGTH];
    DataHelper.xor(ivData, ivOffset, payload, payloadOffset, iv, 0, HopProcessor.IV_LENGTH);
    ByteArray ba = new ByteArray(iv);
    boolean isNew = _received.add(ba);
    return isNew;
}

Example 40 with ByteArray

use of net.i2p.data.ByteArray in project i2p.i2p by i2p.

the class ConnectionManager method ping.

/**
 *  blocking
 *
 *  @param timeoutMs greater than zero
 *  @param payload non-null, include in packet, up to 32 bytes may be returned in pong
 *                 not copied, do not modify
 *  @return the payload received in the pong, zero-length if none, null on failure or timeout
 *  @since 0.9.18
 */
public byte[] ping(Destination peer, int fromPort, int toPort, long timeoutMs, byte[] payload) {
    PingRequest req = new PingRequest(null);
    long id = assignPingId(req);
    PacketLocal packet = new PacketLocal(_context, peer, _session);
    packet.setSendStreamId(id);
    packet.setFlag(Packet.FLAG_ECHO | Packet.FLAG_NO_ACK | Packet.FLAG_SIGNATURE_INCLUDED);
    packet.setOptionalFrom();
    packet.setLocalPort(fromPort);
    packet.setRemotePort(toPort);
    packet.setPayload(new ByteArray(payload));
    if (timeoutMs > MAX_PING_TIMEOUT)
        timeoutMs = MAX_PING_TIMEOUT;
    if (_log.shouldLog(Log.INFO)) {
        _log.info(String.format("about to ping %s port %d from port %d timeout=%d payload=%d", peer.calculateHash().toString(), toPort, fromPort, timeoutMs, payload.length));
    }
    _outboundQueue.enqueue(packet);
    packet.releasePayload();
    synchronized (req) {
        if (!req.pongReceived())
            try {
                req.wait(timeoutMs);
            } catch (InterruptedException ie) {
            }
    }
    _pendingPings.remove(id);
    boolean ok = req.pongReceived();
    if (!ok)
        return null;
    ByteArray ba = req.getPayload();
    if (ba == null)
        return new byte[0];
    byte[] rv = new byte[ba.getValid()];
    System.arraycopy(ba, ba.getOffset(), rv, 0, ba.getValid());
    return rv;
}