Examples with LLDPTLV net.floodlightcontroller.packet.LLDPTLV used on opensource projects

Example 1 with LLDPTLV

use of net.floodlightcontroller.packet.LLDPTLV in project open-kilda by telstra.

the class PathVerificationService method handlePacketIn.

private IListener.Command handlePacketIn(IOFSwitch sw, OFPacketIn pkt, FloodlightContext context) {
    long time = System.currentTimeMillis();
    logger.debug("packet_in {} received from {}", pkt.getXid(), sw.getId());
    VerificationPacket verificationPacket = null;
    Ethernet eth = IFloodlightProviderService.bcStore.get(context, IFloodlightProviderService.CONTEXT_PI_PAYLOAD);
    try {
        verificationPacket = deserialize(eth);
    } catch (Exception exception) {
        logger.error("Deserialization failure: {}, exception: {}", exception.getMessage(), exception);
        return Command.CONTINUE;
    }
    try {
        OFPort inPort = pkt.getVersion().compareTo(OFVersion.OF_12) < 0 ? pkt.getInPort() : pkt.getMatch().get(MatchField.IN_PORT);
        ByteBuffer portBB = ByteBuffer.wrap(verificationPacket.getPortId().getValue());
        portBB.position(1);
        OFPort remotePort = OFPort.of(portBB.getShort());
        long timestamp = 0;
        int pathOrdinal = 10;
        IOFSwitch remoteSwitch = null;
        boolean signed = false;
        for (LLDPTLV lldptlv : verificationPacket.getOptionalTLVList()) {
            if (lldptlv.getType() == 127 && lldptlv.getLength() == 12 && lldptlv.getValue()[0] == 0x0 && lldptlv.getValue()[1] == 0x26 && lldptlv.getValue()[2] == (byte) 0xe1 && lldptlv.getValue()[3] == 0x0) {
                ByteBuffer dpidBB = ByteBuffer.wrap(lldptlv.getValue());
                remoteSwitch = switchService.getSwitch(DatapathId.of(dpidBB.getLong(4)));
            } else if (lldptlv.getType() == 127 && lldptlv.getLength() == 12 && lldptlv.getValue()[0] == 0x0 && lldptlv.getValue()[1] == 0x26 && lldptlv.getValue()[2] == (byte) 0xe1 && lldptlv.getValue()[3] == 0x01) {
                ByteBuffer tsBB = ByteBuffer.wrap(lldptlv.getValue());
                /* skip OpenFlow OUI (4 bytes above) */
                long swLatency = sw.getLatency().getValue();
                timestamp = tsBB.getLong(4);
                /* include the RX switch latency to "subtract" it */
                timestamp = timestamp + swLatency;
            } else if (lldptlv.getType() == 127 && lldptlv.getLength() == 8 && lldptlv.getValue()[0] == 0x0 && lldptlv.getValue()[1] == 0x26 && lldptlv.getValue()[2] == (byte) 0xe1 && lldptlv.getValue()[3] == 0x02) {
                ByteBuffer typeBB = ByteBuffer.wrap(lldptlv.getValue());
                pathOrdinal = typeBB.getInt(4);
            } else if (lldptlv.getType() == 127 && lldptlv.getValue()[0] == 0x0 && lldptlv.getValue()[1] == 0x26 && lldptlv.getValue()[2] == (byte) 0xe1 && lldptlv.getValue()[3] == 0x03) {
                ByteBuffer bb = ByteBuffer.wrap(lldptlv.getValue());
                bb.position(4);
                byte[] tokenArray = new byte[lldptlv.getLength() - 4];
                bb.get(tokenArray, 0, tokenArray.length);
                String token = new String(tokenArray);
                try {
                    DecodedJWT jwt = verifier.verify(token);
                    signed = true;
                } catch (JWTVerificationException e) {
                    logger.error("Packet verification failed", e);
                    return Command.STOP;
                }
            }
        }
        if (remoteSwitch == null) {
            return Command.STOP;
        }
        if (!signed) {
            logger.warn("verification packet without sign");
            return Command.STOP;
        }
        U64 latency = (timestamp != 0 && (time - timestamp) > 0) ? U64.of(time - timestamp) : U64.ZERO;
        logger.debug("link discovered: {}-{} ===( {} ms )===> {}-{}", remoteSwitch.getId(), remotePort, latency.getValue(), sw.getId(), inPort);
        // this verification packet was sent from remote switch/port to received switch/port
        // so the link direction is from remote switch/port to received switch/port
        List<PathNode> nodes = Arrays.asList(new PathNode(remoteSwitch.getId().toString(), remotePort.getPortNumber(), 0, latency.getValue()), new PathNode(sw.getId().toString(), inPort.getPortNumber(), 1));
        OFPortDesc port = sw.getPort(inPort);
        long speed = Integer.MAX_VALUE;
        if (port.getVersion().compareTo(OFVersion.OF_13) > 0) {
            for (OFPortDescProp prop : port.getProperties()) {
                if (prop.getType() == 0x0) {
                    speed = ((OFPortDescPropEthernet) prop).getCurrSpeed();
                }
            }
        } else {
            speed = port.getCurrSpeed();
        }
        IslInfoData path = new IslInfoData(latency.getValue(), nodes, speed, IslChangeType.DISCOVERED, getAvailableBandwidth(speed));
        Message message = new InfoMessage(path, System.currentTimeMillis(), "system", null);
        final String json = MAPPER.writeValueAsString(message);
        logger.debug("about to send {}", json);
        producer.send(new ProducerRecord<>(TOPIC, json));
        logger.debug("packet_in processed for {}-{}", sw.getId(), inPort);
    } catch (JsonProcessingException exception) {
        logger.error("could not create json for path packet_in: {}", exception.getMessage(), exception);
    } catch (UnsupportedOperationException exception) {
        logger.error("could not parse packet_in message: {}", exception.getMessage(), exception);
    } catch (Exception exception) {
        logger.error("unknown error during packet_in message processing: {}", exception.getMessage(), exception);
        throw exception;
    }
    return Command.STOP;
}

Example 2 with LLDPTLV

use of net.floodlightcontroller.packet.LLDPTLV in project open-kilda by telstra.

the class PathVerificationService method generateVerificationPacket.

public OFPacketOut generateVerificationPacket(IOFSwitch srcSw, OFPort port, IOFSwitch dstSw, boolean sign) {
    try {
        OFPortDesc ofPortDesc = srcSw.getPort(port);
        byte[] chassisId = new byte[] { 4, 0, 0, 0, 0, 0, 0 };
        byte[] portId = new byte[] { 2, 0, 0 };
        byte[] ttlValue = new byte[] { 0, 0x78 };
        byte[] dpidTLVValue = new byte[] { 0x0, 0x26, (byte) 0xe1, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
        LLDPTLV dpidTLV = new LLDPTLV().setType((byte) 127).setLength((short) dpidTLVValue.length).setValue(dpidTLVValue);
        byte[] dpidArray = new byte[8];
        ByteBuffer dpidBB = ByteBuffer.wrap(dpidArray);
        ByteBuffer portBB = ByteBuffer.wrap(portId, 1, 2);
        DatapathId dpid = srcSw.getId();
        dpidBB.putLong(dpid.getLong());
        System.arraycopy(dpidArray, 2, chassisId, 1, 6);
        // Set the optionalTLV to the full SwitchID
        System.arraycopy(dpidArray, 0, dpidTLVValue, 4, 8);
        byte[] zeroMac = { 0, 0, 0, 0, 0, 0 };
        byte[] srcMac = ofPortDesc.getHwAddr().getBytes();
        if (Arrays.equals(srcMac, zeroMac)) {
            int portVal = ofPortDesc.getPortNo().getPortNumber();
            // this is a common scenario
            logger.debug("Port {}/{} has zero hardware address: overwrite with lower 6 bytes of dpid", dpid.toString(), portVal);
            System.arraycopy(dpidArray, 2, srcMac, 0, 6);
        }
        portBB.putShort(port.getShortPortNumber());
        VerificationPacket vp = new VerificationPacket();
        vp.setChassisId(new LLDPTLV().setType((byte) 1).setLength((short) chassisId.length).setValue(chassisId));
        vp.setPortId(new LLDPTLV().setType((byte) 2).setLength((short) portId.length).setValue(portId));
        vp.setTtl(new LLDPTLV().setType((byte) 3).setLength((short) ttlValue.length).setValue(ttlValue));
        vp.getOptionalTLVList().add(dpidTLV);
        // Add the controller identifier to the TLV value.
        // vp.getOptionalTLVList().add(controllerTLV);
        // Add T0 based on format from Floodlight LLDP
        long time = System.currentTimeMillis();
        long swLatency = srcSw.getLatency().getValue();
        byte[] timestampTLVValue = ByteBuffer.allocate(Long.SIZE / 8 + 4).put((byte) 0x00).put((byte) 0x26).put((byte) 0xe1).put(// 0x01 is what we'll use to differentiate DPID (0x00) from time (0x01)
        (byte) 0x01).putLong(time + swLatency).array();
        LLDPTLV timestampTLV = new LLDPTLV().setType((byte) 127).setLength((short) timestampTLVValue.length).setValue(timestampTLVValue);
        vp.getOptionalTLVList().add(timestampTLV);
        // Type
        byte[] typeTLVValue = ByteBuffer.allocate(Integer.SIZE / 8 + 4).put((byte) 0x00).put((byte) 0x26).put((byte) 0xe1).put((byte) 0x02).putInt(PathType.ISL.ordinal()).array();
        LLDPTLV typeTLV = new LLDPTLV().setType((byte) 127).setLength((short) typeTLVValue.length).setValue(typeTLVValue);
        vp.getOptionalTLVList().add(typeTLV);
        if (sign) {
            String token = JWT.create().withClaim("dpid", dpid.getLong()).withClaim("ts", time + swLatency).sign(algorithm);
            byte[] tokenBytes = token.getBytes(Charset.forName("UTF-8"));
            byte[] tokenTLVValue = ByteBuffer.allocate(4 + tokenBytes.length).put((byte) 0x00).put((byte) 0x26).put((byte) 0xe1).put((byte) 0x03).put(tokenBytes).array();
            LLDPTLV tokenTLV = new LLDPTLV().setType((byte) 127).setLength((short) tokenTLVValue.length).setValue(tokenTLVValue);
            vp.getOptionalTLVList().add(tokenTLV);
        }
        MacAddress dstMac = MacAddress.of(VERIFICATION_BCAST_PACKET_DST);
        if (dstSw != null) {
            OFPortDesc sw2OfPortDesc = dstSw.getPort(port);
            dstMac = sw2OfPortDesc.getHwAddr();
        }
        Ethernet l2 = new Ethernet().setSourceMACAddress(MacAddress.of(srcMac)).setDestinationMACAddress(dstMac).setEtherType(EthType.IPv4);
        IPv4Address dstIp = IPv4Address.of(VERIFICATION_PACKET_IP_DST);
        if (dstSw != null) {
            dstIp = IPv4Address.of(((InetSocketAddress) dstSw.getInetAddress()).getAddress().getAddress());
        }
        IPv4 l3 = new IPv4().setSourceAddress(IPv4Address.of(((InetSocketAddress) srcSw.getInetAddress()).getAddress().getAddress())).setDestinationAddress(dstIp).setTtl((byte) 64).setProtocol(IpProtocol.UDP);
        UDP l4 = new UDP();
        l4.setSourcePort(TransportPort.of(VERIFICATION_PACKET_UDP_PORT));
        l4.setDestinationPort(TransportPort.of(VERIFICATION_PACKET_UDP_PORT));
        l2.setPayload(l3);
        l3.setPayload(l4);
        l4.setPayload(vp);
        byte[] data = l2.serialize();
        OFPacketOut.Builder pob = srcSw.getOFFactory().buildPacketOut().setBufferId(OFBufferId.NO_BUFFER).setActions(getDiscoveryActions(srcSw, port)).setData(data);
        OFMessageUtils.setInPort(pob, OFPort.CONTROLLER);
        return pob.build();
    } catch (Exception exception) {
        logger.error("error generating verification packet: {}", exception);
    }
    return null;
}

Example 3 with LLDPTLV

use of net.floodlightcontroller.packet.LLDPTLV in project open-kilda by telstra.

the class VerificationPacket method serialize.

public byte[] serialize() {
    int length = 2 + this.chassisId.getLength() + 2 + this.portId.getLength() + 2 + this.ttl.getLength() + 2;
    for (LLDPTLV tlv : this.optionalTLVList) {
        if (tlv != null)
            length += 2 + tlv.getLength();
    }
    byte[] data = new byte[length];
    ByteBuffer bb = ByteBuffer.wrap(data);
    bb.put(this.chassisId.serialize());
    bb.put(this.portId.serialize());
    bb.put(this.ttl.serialize());
    for (LLDPTLV tlv : this.optionalTLVList) {
        if (tlv != null)
            bb.put(tlv.serialize());
    }
    // End of LLDPDU
    bb.putShort((short) 0);
    return data;
}

Example 4 with LLDPTLV

use of net.floodlightcontroller.packet.LLDPTLV in project open-kilda by telstra.

the class VerificationPacket method toString.

@Override
public String toString() {
    String str = "";
    str += "chassisId=" + ((this.chassisId == null) ? "null" : this.chassisId.toString());
    str += " portId=" + ((this.portId == null) ? "null" : this.portId.toString());
    str += " ttl=" + ((this.ttl == null) ? "null" : this.ttl.toString());
    str += " etherType=" + ethType.toString();
    str += " optionalTlvList=[";
    if (this.optionalTLVList != null) {
        for (LLDPTLV l : optionalTLVList) str += l.toString() + ", ";
    }
    str += "]";
    return str;
}

Example 5 with LLDPTLV

use of net.floodlightcontroller.packet.LLDPTLV in project open-kilda by telstra.

the class VerificationPacket method deserialize.

public IPacket deserialize(byte[] data, int offset, int length) {
    ByteBuffer bb = ByteBuffer.wrap(data, offset, length);
    LLDPTLV tlv;
    do {
        tlv = new LLDPTLV().deserialize(bb);
        // if there was a failure to deserialize stop processing TLVs
        if (tlv == null)
            break;
        switch(tlv.getType()) {
            case 0x0:
                // can throw this one away, its just an end delimiter
                break;
            case 0x1:
                this.chassisId = tlv;
                break;
            case 0x2:
                this.portId = tlv;
                break;
            case 0x3:
                this.ttl = tlv;
                break;
            default:
                this.optionalTLVList.add(tlv);
                break;
        }
    } while (tlv.getType() != 0 && bb.hasRemaining());
    return this;
}