Java Channel.write方法代碼示例

import org.jboss.netty.channel.Channel; //導入方法依賴的package包/類
private static void sendResponse(
        Channel channel, SocketAddress remoteAddress, ChannelBuffer id, int index, int report) {

    if (channel != null) {
        ChannelBuffer response = ChannelBuffers.dynamicBuffer();
        response.writeBytes("SM".getBytes(StandardCharsets.US_ASCII));
        response.writeByte(3); // protocol version
        response.writeByte(MSG_DATE_RECORD_ACK);
        response.writeBytes(id);
        response.writeInt(Seconds.secondsBetween(
                new DateTime(2000, 1, 1, 0, 0, DateTimeZone.UTC), new DateTime(DateTimeZone.UTC)).getSeconds());
        response.writeByte(index);
        response.writeByte(report - 0x200);

        short checksum = (short) 0xF5A0;
        for (int i = 0; i < response.readableBytes(); i += 2) {
            checksum ^= ChannelBuffers.swapShort(response.getShort(i));
        }
        response.writeShort(checksum);

        channel.write(response, remoteAddress);
    }
}
 

import org.jboss.netty.channel.Channel; //導入方法依賴的package包/類
private static void sendResponse(
        Channel channel, SocketAddress remoteAddress, ChannelBuffer id, int type, ChannelBuffer msg) {

    if (channel != null) {
        ChannelBuffer buf = ChannelBuffers.buffer(
                2 + 2 + id.readableBytes() + 2 + msg.readableBytes() + 2 + 2);

        buf.writeByte('@');
        buf.writeByte('@');
        buf.writeShort(buf.capacity());
        buf.writeBytes(id);
        buf.writeShort(type);
        buf.writeBytes(msg);
        buf.writeShort(Checksum.crc16(Checksum.CRC16_CCITT_FALSE, buf.toByteBuffer()));
        buf.writeByte('\r');
        buf.writeByte('\n');

        channel.write(buf, remoteAddress);
    }
}
 

import org.jboss.netty.channel.Channel; //導入方法依賴的package包/類
/**
 * Sends a direct Acknowledgment for a particular LSA to the Neighbor.
 *
 * @param ackLsa   LSA instance
 * @param ch       netty channel instance
 * @param sourceIp source IP address
 */
public void directAcknowledge(LsaHeader ackLsa, Channel ch, Ip4Address sourceIp) {
    log.debug("OSPFNbr::directAcknowledge...!!!");

    LsAcknowledge ackContent = new LsAcknowledge();
    // seting OSPF Header
    ackContent.setOspfVer(OspfUtil.OSPF_VERSION);
    ackContent.setOspftype(OspfPacketType.LSAACK.value());
    ackContent.setRouterId(ospfArea.routerId());
    ackContent.setAreaId(ospfArea.areaId());
    ackContent.setAuthType(OspfUtil.NOT_ASSIGNED);
    ackContent.setAuthentication(OspfUtil.NOT_ASSIGNED);
    ackContent.setOspfPacLength(OspfUtil.NOT_ASSIGNED); // to calculate packet length
    ackContent.setChecksum(OspfUtil.NOT_ASSIGNED);
    ackContent.addLinkStateHeader(ackLsa);
    //setting the destination IP
    ackContent.setDestinationIp(sourceIp);
    byte[] messageToWrite = getMessage(ackContent);
    ch.write(messageToWrite);
}
 

import org.jboss.netty.channel.Channel; //導入方法依賴的package包/類
private void sendResponse(Channel channel, byte calibration) {
    if (channel != null) {
        ChannelBuffer response = ChannelBuffers.dynamicBuffer();
        response.writeByte(0x24); response.writeByte(0x24); // header
        response.writeByte(MSG_HEARTBEAT); // size
        response.writeShort(5);
        response.writeByte(calibration);
        response.writeByte(0); // main order
        response.writeByte(0); // slave order
        response.writeByte(1); // calibration
        response.writeByte(0x0D);
        channel.write(response);
    }
}
 

import org.jboss.netty.channel.Channel; //導入方法依賴的package包/類
protected void handshakeChallengeResponse(HelloMessage request,
                                          Channel channel) 
                                                  throws AuthException {
    AuthChallengeResponse cr = request.getAuthChallengeResponse();
    if (cr == null) {
        throw new AuthException("No authentication data in " + 
                "handshake message");
    }
    if (cr.isSetResponse()) {
        authenticateResponse(currentChallenge, cr.getResponse());
        currentChallenge = null;
        channelState = ChannelState.AUTHENTICATED;
        handleHello(request, channel);
    } else if (cr.isSetChallenge()) {
        HelloMessage m = new HelloMessage();
        if (getLocalNodeId() != null)
            m.setNodeId(getLocalNodeId());
        AsyncMessageHeader header = new AsyncMessageHeader();
        header.setTransactionId(getTransactionId());
        m.setHeader(header);
        SyncMessage bsm = new SyncMessage(MessageType.HELLO);
        bsm.setHello(m);

        AuthChallengeResponse reply = new AuthChallengeResponse();
        reply.setResponse(generateResponse(cr.getChallenge()));
        m.setAuthChallengeResponse(reply);
        channel.write(bsm);
    } else {
        throw new AuthException("No authentication data in " + 
                "handshake message");
    }
}
 

import org.jboss.netty.channel.Channel; //導入方法依賴的package包/類
private Object decodeOther(Channel channel, SocketAddress remoteAddress, String sentence, String type) {
    Parser parser = new Parser(PATTERN, sentence);
    Position position = initPosition(parser, channel, remoteAddress);
    if (position == null) {
        return null;
    }

    int reportType = parser.nextInt(0);
    if (type.equals("NMR")) {
        position.set(Position.KEY_MOTION, reportType == 1);
    } else if (type.equals("SOS")) {
        position.set(Position.KEY_ALARM, Position.ALARM_SOS);
    }

    decodeLocation(position, parser);

    position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
    position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt(0));

    position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);

    decodeDeviceTime(position, parser);

    if (Context.getConfig().getBoolean(getProtocolName() + ".ack") && channel != null) {
        channel.write("+SACK:" + parser.next() + "$", remoteAddress);
    }

    return position;
}
 

import org.jboss.netty.channel.Channel; //導入方法依賴的package包/類
@Override
protected Object decode(
        Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {

    String sentence = (String) msg;

    if (sentence.contains("AT+GTHBD=") && channel != null) {
        String response = "+RESP:GTHBD,GPRS ACTIVE,";
        response += sentence.substring(9, sentence.lastIndexOf(','));
        response += '\0';
        channel.write(response); // heartbeat response
    }

    Parser parser = new Parser(PATTERN, sentence);
    if (!parser.matches()) {
        return null;
    }

    Position position = new Position();
    position.setProtocol(getProtocolName());

    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
    if (deviceSession == null) {
        return null;
    }
    position.setDeviceId(deviceSession.getDeviceId());

    position.setValid(parser.nextInt(0) == 0);
    position.setSpeed(parser.nextDouble(0));
    position.setCourse(parser.nextDouble(0));
    position.setAltitude(parser.nextDouble(0));
    position.setLongitude(parser.nextDouble(0));
    position.setLatitude(parser.nextDouble(0));

    position.setTime(parser.nextDateTime());

    return position;
}
 

import org.jboss.netty.channel.Channel; //導入方法依賴的package包/類
private void sendResponse(Channel channel, int type, int index) {
    if (channel != null) {
        ChannelBuffer response = ChannelBuffers.buffer(7);
        response.writeByte(0x67); response.writeByte(0x67); // header
        response.writeByte(type);
        response.writeShort(2); // length
        response.writeShort(index);
        channel.write(response);
    }
}
 

import org.jboss.netty.channel.Channel; //導入方法依賴的package包/類
@Override
protected Object decode(
        Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {

    Parser parser = new Parser(PATTERN, (String) msg);
    if (!parser.matches()) {
        return null;
    }

    Position position = new Position();
    position.setProtocol(getProtocolName());

    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
    if (deviceSession == null) {
        return null;
    }
    position.setDeviceId(deviceSession.getDeviceId());

    String time = parser.next();
    position.setTime(new Date(Long.parseLong(time) * 1000));

    position.setLatitude(parser.nextDouble(0));
    position.setLongitude(parser.nextDouble(0));
    position.setSpeed(parser.nextInt(0));
    position.setCourse(parser.nextInt(0));
    position.setAccuracy(parser.nextInt(0));
    position.setAltitude(parser.nextInt(0));

    position.set(Position.KEY_STATUS, parser.nextInt(0));
    position.set(Position.KEY_BATTERY, parser.nextInt(0));
    position.set(Position.PREFIX_TEMP + 1, parser.nextInt(0));
    position.set(Position.KEY_CHARGE, parser.nextInt(0) == 1);

    if (channel != null) {
        channel.write(time, remoteAddress);
    }

    return position;
}
 

import org.jboss.netty.channel.Channel; //導入方法依賴的package包/類
private void requestArchive(Channel channel) {
    if (lastIndex == 0) {
        lastIndex = newIndex;
    } else if (newIndex > lastIndex) {
        ChannelBuffer request = ChannelBuffers.directBuffer(ByteOrder.LITTLE_ENDIAN, 12);
        request.writeShort(MSG_LOG_SYNC);
        request.writeShort(4);
        request.writeInt((int) lastIndex);
        request.writeInt(0);
        channel.write(request);
    }
}
 

import org.jboss.netty.channel.Channel; //導入方法依賴的package包/類
/**
 * Sends the partial sequence number PDU.
 *
 * @param lspEntryRequestList list of lsp entry request
 * @param isisPduType         intermediate system PDU type
 * @param channel             netty channel instance
 */
private void sendPsnPduMessage(List<LspEntry> lspEntryRequestList, IsisPduType isisPduType, Channel channel) {
    IsisHeader isisHeader = new LspGenerator().getHeader(isisPduType);
    Psnp psnp = new Psnp(isisHeader);
    psnp.setSourceId(lspKeyP2P(this.systemId));
    TlvHeader tlvHeader = new TlvHeader();
    tlvHeader.setTlvType(TlvType.LSPENTRY.value());
    tlvHeader.setTlvLength(0);
    LspEntriesTlv lspEntriesTlv = new LspEntriesTlv(tlvHeader);
    for (LspEntry lspEntry : lspEntryRequestList) {
        lspEntry.setLspChecksum(0);
        lspEntry.setLspSequenceNumber(0);
        lspEntry.setRemainingTime(0);
        lspEntriesTlv.addLspEntry(lspEntry);
    }
    psnp.addTlv(lspEntriesTlv);
    //write it to channel buffer.
    byte[] psnpBytes = psnp.asBytes();
    psnpBytes = IsisUtil.addLengthAndMarkItInReserved(psnpBytes, IsisConstants.LENGTHPOSITION,
                                                      IsisConstants.LENGTHPOSITION + 1,
                                                      IsisConstants.RESERVEDPOSITION);
    flagValue = false;
    //write to the channel
    if (channel != null && channel.isConnected() && channel.isOpen()) {
        channel.write(IsisUtil.framePacket(psnpBytes, interfaceIndex));
    }
}
 

import org.jboss.netty.channel.Channel; //導入方法依賴的package包/類
private void sendResponse(Channel channel, int type, ChannelBuffer imei) {
    if (channel != null) {
        ChannelBuffer response = ChannelBuffers.directBuffer(15);
        response.writeByte(0x23);
        response.writeByte(0x23); // header
        response.writeByte(type);
        response.writeShort(response.capacity()); // length
        response.writeShort(0x0001); // index
        response.writeBytes(imei);
        channel.write(response);
    }
}
 

import org.jboss.netty.channel.Channel; //導入方法依賴的package包/類
/**
 * Sends LS PDU message to channel.
 *
 * @param lsp     LS PDU message instance
 * @param channel channel instance
 */
private void sendLsp(LsPdu lsp, Channel channel) {
    byte[] lspBytes = lsp.asBytes();
    lspBytes = IsisUtil.addLengthAndMarkItInReserved(lspBytes, IsisConstants.LENGTHPOSITION,
                                                     IsisConstants.LENGTHPOSITION + 1,
                                                     IsisConstants.RESERVEDPOSITION);
    lspBytes = IsisUtil.addChecksum(lspBytes, IsisConstants.CHECKSUMPOSITION,
                                    IsisConstants.CHECKSUMPOSITION + 1);
    //write to the channel
    if (channel != null && channel.isConnected() && channel.isOpen()) {
        channel.write(IsisUtil.framePacket(lspBytes, interfaceIndex));
    }
}
 

import org.jboss.netty.channel.Channel; //導入方法依賴的package包/類
private List<Position> decodeBinaryMessage(Channel channel, SocketAddress remoteAddress, ChannelBuffer buf) {
    List<Position> positions = new LinkedList<>();

    String flag = buf.toString(2, 1, StandardCharsets.US_ASCII);
    int index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) ',');

    String imei = buf.toString(index + 1, 15, StandardCharsets.US_ASCII);
    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
    if (deviceSession == null) {
        return null;
    }

    buf.skipBytes(index + 1 + 15 + 1 + 3 + 1 + 2 + 2 + 4);

    while (buf.readableBytes() >= 0x34) {

        Position position = new Position();
        position.setProtocol(getProtocolName());
        position.setDeviceId(deviceSession.getDeviceId());

        position.set(Position.KEY_EVENT, buf.readUnsignedByte());

        position.setLatitude(buf.readInt() * 0.000001);
        position.setLongitude(buf.readInt() * 0.000001);

        position.setTime(new Date((946684800 + buf.readUnsignedInt()) * 1000)); // 946684800 = 2000-01-01

        position.setValid(buf.readUnsignedByte() == 1);

        position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
        int rssi = buf.readUnsignedByte();

        position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort()));
        position.setCourse(buf.readUnsignedShort());

        position.set(Position.KEY_HDOP, buf.readUnsignedShort() * 0.1);

        position.setAltitude(buf.readUnsignedShort());

        position.set(Position.KEY_ODOMETER, buf.readUnsignedInt());
        position.set("runtime", buf.readUnsignedInt());

        position.setNetwork(new Network(CellTower.from(
                buf.readUnsignedShort(), buf.readUnsignedShort(),
                buf.readUnsignedShort(), buf.readUnsignedShort(),
                rssi)));

        position.set(Position.KEY_STATUS, buf.readUnsignedShort());

        position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShort());
        position.set(Position.KEY_BATTERY, buf.readUnsignedShort() * 0.01);
        position.set(Position.KEY_POWER, buf.readUnsignedShort());

        buf.readUnsignedInt(); // geo-fence

        positions.add(position);
    }

    if (channel != null) {
        StringBuilder command = new StringBuilder("@@");
        command.append(flag).append(27 + positions.size() / 10).append(",");
        command.append(imei).append(",CCC,").append(positions.size()).append("*");
        int checksum = 0;
        for (int i = 0; i < command.length(); i += 1) {
            checksum += command.charAt(i);
        }
        command.append(String.format("%02x", checksum & 0xff).toUpperCase());
        command.append("\r\n");
        channel.write(command.toString()); // delete processed data
    }

    return positions;
}
 

import org.jboss.netty.channel.Channel; //導入方法依賴的package包/類
@Override
@LogMessageDoc(level="ERROR",
          message="[{id}->{id}] Attempted connection from unrecognized " +
                  "floodlight node {id}; disconnecting",
          explanation="A unknown node connected.  This can happen " +
                  "transiently if new nodes join the cluster.",
          recommendation="If the problem persists, verify your cluster" +
            "configuration and that you don't have unauthorized agents " +
            "in your network.")
protected void handleHello(HelloMessage hello, Channel channel) {
    if (!hello.isSetNodeId()) {
        // this is a client connection.  Don't set this up as a node
        // connection
        isClientConnection = true;
        return;
    }
    remoteNode = syncManager.getClusterConfig().getNode(hello.getNodeId());
    if (remoteNode == null) {
        logger.error("[{}->{}] Attempted connection from unrecognized " +
                     "floodlight node {}; disconnecting",
                     new Object[]{getLocalNodeIdString(),
                                  getRemoteNodeIdString(),
                                  hello.getNodeId()});
        channel.close();
        return;
    }
    rpcService.nodeConnected(remoteNode.getNodeId(), channel);

    FullSyncRequestMessage srm = new FullSyncRequestMessage();
    AsyncMessageHeader header = new AsyncMessageHeader();
    header.setTransactionId(getTransactionId());
    srm.setHeader(header);
    SyncMessage bsm = new SyncMessage(MessageType.FULL_SYNC_REQUEST);
    channel.write(bsm);

    // XXX - TODO - if last connection was longer ago than the tombstone
    // timeout, then we need to do a complete flush and reload of our
    // state.  This is complex though since this applies across entire
    // partitions and not just single nodes.  We'd need to identify the
    // partition and nuke the smaller half (or lower priority in the case
    // of an even split).  Downstream listeners would need to be able to
    // handle a state nuke as well. A simple way to nuke would be to ensure
    // floodlight is restarted in the smaller partition.
}