ONOS链路发现源码

ONOS链路发现源码

    //send LLDP by ynogpu
    private void sendProbes(Long portNumber, String portDesc) {
        if (context.packetService() == null) {
            return;
        }
        OutboundPacket pkt = createOutBoundLldp(portNumber, portDesc);
        context.packetService().emit(pkt);
        if (context.useBddp()) {
            OutboundPacket bpkt = createOutBoundBddp(portNumber, portDesc);
            context.packetService().emit(bpkt);
        }
    }

----------------------------------------------------------------------------
----------------------------------------------------------------------------

    /**
     * Creates packet_out LLDP for specified output port.
     * @param portNumber the port
     * @param portDesc the port description
     * @return Packet_out message with LLDP data
     */
    //为指定的输出端口创建packet_out LLDP
    private OutboundPacket createOutBoundLldp(Long portNumber, String portDesc) { 
        log.info("yongpu-----createOutBoundLldp{}@{}",portNumber,portDesc);
        if (portNumber == null) {
            return null;
        }
        ONOSLLDP lldp = getLinkProbe(context.deviceService().getDevice(device.id()).chassisId(),
                portNumber, portDesc);
        ethPacket.setSourceMACAddress(context.fingerprint()).setPayload(lldp);
        return new DefaultOutboundPacket(device.id(),
                                         builder().setOutput(portNumber(portNumber)).build(),
                                         ByteBuffer.wrap(ethPacket.serialize()));
    }

  private ONOSLLDP getLinkProbe(ChassisId chassisId, Long portNumber, String portDesc) {
        return ONOSLLDP.onosLLDP(device.id().toString(), chassisId, portNumber.intValue(), portDesc);
}

----------------------------------------------------------------------------
----------------------------------------------------------------------------

/**
     * Creates a link probe for link discovery/verification.
     * @param deviceId The device ID as a String
     * @param chassisId The chassis ID of the device
     * @param portNum Port number of port to send probe out of
     * @param portDesc Port description of port to send probe out of
     * @return ONOSLLDP probe message
     */
    public static ONOSLLDP onosLLDP(String deviceId, ChassisId chassisId, int portNum, String portDesc) {
        ONOSLLDP probe = onosLLDP(deviceId, chassisId, portNum);

        if (portDesc != null && !portDesc.isEmpty()) {
            byte[] bPortDesc = portDesc.getBytes(StandardCharsets.UTF_8);

            if (bPortDesc.length > LLDPTLV.MAX_LENGTH) {
                bPortDesc = Arrays.copyOf(bPortDesc, LLDPTLV.MAX_LENGTH);
            }
            LLDPTLV portDescTlv = new LLDPTLV()
                    .setType(PORT_DESC_TLV_TYPE)
                    .setLength((short) bPortDesc.length)
                    .setValue(bPortDesc);
            probe.addOptionalTLV(portDescTlv);
        }
        return probe;
    }

----------------------------------------------------------------------------
----------------------------------------------------------------------------

  /**
     * Creates a link probe for link discovery/verification.
     * @param deviceId The device ID as a String
     * @param chassisId The chassis ID of the device
     * @param portNum Port number of port to send probe out of
     * @return ONOSLLDP probe message
     */
    public static ONOSLLDP onosLLDP(String deviceId, ChassisId chassisId, int portNum) {
        ONOSLLDP probe = new ONOSLLDP(NAME_SUBTYPE, DEVICE_SUBTYPE);
        probe.setPortId(portNum);
        probe.setDevice(deviceId);
        probe.setChassisId(chassisId);
        return probe;
    }