Examples of org.apache.sshd.common.util.Buffer

org.apache.sshd.common.util.Buffer
TODO Add javadoc @author Apache MINA SSHD Project

     * @param cmd the SSH command
     * @param len estimated number of bytes the buffer will hold, 0 if unknown.
     * @return a new buffer ready for write
     */
    public Buffer createBuffer(byte cmd, int len) {
        Buffer buffer;
        if (len <= 0) {
            buffer = new Buffer();
        } else {
            // Since the caller claims to know how many bytes they will need
            // increase their request to account for our headers/footers if
            // they actually send exactly this amount.
            //
            int bsize = outCipherSize;
            len += 5;
            int pad = (-len) & (bsize - 1);
            if (pad < bsize) {
                pad += bsize;
            }
            len = len + pad - 4;
            if (outMac != null) {
                len += outMac.getBlockSize();
            }
            buffer = new Buffer(new byte[Math.max(len, Buffer.DEFAULT_SIZE)], false);
        }
        buffer.rpos(5);
        buffer.wpos(5);
        buffer.putByte(cmd);
        return buffer;
    }

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            if (closeFuture.isClosed()) {
                throw new SshException("Session has been closed");
            }
            openFuture = new DefaultOpenFuture(lock);
            log.info("Send SSH_MSG_CHANNEL_OPEN on channel {}", id);
            Buffer buffer = session.createBuffer(SshConstants.SSH_MSG_CHANNEL_OPEN);
            buffer.putString(type);
            buffer.putInt(id);
            buffer.putInt(localWindow.getSize());
            buffer.putInt(localWindow.getPacketSize());
            buffer.putString(remote.getAddress().getHostAddress());
            buffer.putInt(remote.getPort());
            writePacket(buffer);
            return openFuture;
        }

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            return CloseableUtils.sequential(serverSession, super.getInnerCloseable());
        }


        protected synchronized void doWriteData(byte[] data, int off, int len) throws IOException {
            localWindow.consumeAndCheck(len);
            serverSession.write(new Buffer(data, off, len));
        }

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        return new SshdSocketAddress(remote.getHostName(), port);
    }


    public synchronized void stopRemotePortForwarding(SshdSocketAddress remote) throws IOException {
        if (remoteToLocal.remove(remote.getPort()) != null) {
            Buffer buffer = session.createBuffer(SshConstants.SSH_MSG_GLOBAL_REQUEST);
            buffer.putString("cancel-tcpip-forward");
            buffer.putBoolean(false);
            buffer.putString(remote.getHostName());
            buffer.putInt(remote.getPort());
            session.writePacket(buffer);
        }
    }

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        try {
            // Check that the packet has some free space for the header
            if (buffer.rpos() < 5) {
                log.warn("Performance cost: when sending a packet, ensure that "
                           + "5 bytes are available in front of the buffer");
                Buffer nb = new Buffer();
                nb.wpos(5);
                nb.putBuffer(buffer);
                buffer = nb;
            }
            // Grab the length of the packet (excluding the 5 header bytes)
            int len = buffer.available();
            int off = buffer.rpos() - 5;

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                    }
                    // Increment incoming packet sequence number
                    seqi = (seqi + 1) & 0xffffffffL;
                    // Get padding
                    byte pad = decoderBuffer.getByte();
                    Buffer buf;
                    int wpos = decoderBuffer.wpos();
                    // Decompress if needed
                    if (inCompression != null && (authed || !inCompression.isDelayed())) {
                        if (uncompressBuffer == null) {
                            uncompressBuffer = new Buffer();
                        } else {
                            uncompressBuffer.clear();
                        }
                        decoderBuffer.wpos(decoderBuffer.rpos() + decoderLength - 1 - pad);
                        inCompression.uncompress(decoderBuffer, uncompressBuffer);
                        buf = uncompressBuffer;
                    } else {
                        decoderBuffer.wpos(decoderLength + 4 - pad);
                        buf = decoderBuffer;
                    }
                    if (log.isTraceEnabled()) {
                        log.trace("Received packet #{}: {}", seqi, buf.printHex());
                    }
                    // Update stats
                    inPackets ++;
                    inBytes += buf.available();
                    // Process decoded packet
                    handleMessage(buf);
                    // Set ready to handle next packet
                    decoderBuffer.rpos(decoderLength + 4 + macSize);
                    decoderBuffer.wpos(wpos);

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        }
    }


    public void messageReceived(IoSession session, Readable message) throws Exception {
        TcpipClientChannel channel = (TcpipClientChannel) session.getAttribute(TcpipClientChannel.class);
        Buffer buffer = new Buffer();
        buffer.putBuffer(message);
        channel.waitFor(ClientChannel.OPENED | ClientChannel.CLOSED, Long.MAX_VALUE);
        channel.getInvertedIn().write(buffer.array(), buffer.rpos(), buffer.available());
        channel.getInvertedIn().flush();
    }

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     *
     * @param ident our identification to send
     */
    protected void sendIdentification(String ident) {
        byte[] data = (ident + "\r\n").getBytes();
        ioSession.write(new Buffer(data));
    }

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     * @return the sent packet which must be kept for later use
     * @throws IOException if an error occurred sending the packet
     */
    protected byte[] sendKexInit(String[] proposal) throws IOException {
        log.debug("Send SSH_MSG_KEXINIT");
        Buffer buffer = createBuffer(SshConstants.SSH_MSG_KEXINIT);
        int p = buffer.wpos();
        buffer.wpos(p + 16);
        random.fill(buffer.array(), p, 16);
        for (String s : proposal) {
            buffer.putString(s);
        }
        buffer.putByte((byte) 0);
        buffer.putInt(0);
        byte[] data = buffer.getCompactData();
        writePacket(buffer);
        return data;
    }

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     *
     * @throws IOException if an error occurs sending the message
     */
    protected void sendNewKeys() throws IOException {
        log.debug("Send SSH_MSG_NEWKEYS");
        Buffer buffer = createBuffer(SshConstants.SSH_MSG_NEWKEYS);
        writePacket(buffer);
    }

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