Examples with Dhcp6Option org.onlab.packet.dhcp.Dhcp6Option used on opensource projects

Example 1 with Dhcp6Option

use of org.onlab.packet.dhcp.Dhcp6Option in project onos by opennetworkinglab.

the class Dhcp6HandlerUtil method addDhcp6OptionsFromClient.

private static void addDhcp6OptionsFromClient(List<Dhcp6Option> options, byte[] dhcp6PacketByte, PacketContext context, Ethernet clientPacket) {
    Dhcp6Option relayMessage = new Dhcp6Option();
    relayMessage.setCode(DHCP6.OptionCode.RELAY_MSG.value());
    relayMessage.setLength((short) dhcp6PacketByte.length);
    relayMessage.setData(dhcp6PacketByte);
    options.add(relayMessage);
    // create interfaceId option
    Dhcp6Option interfaceId = getInterfaceIdIdOption(context, clientPacket);
    options.add(interfaceId);
}

Example 2 with Dhcp6Option

use of org.onlab.packet.dhcp.Dhcp6Option in project onos by opennetworkinglab.

the class Dhcp6HandlerUtil method getInterfaceIdIdOption.

private static Dhcp6Option getInterfaceIdIdOption(PacketContext context, Ethernet clientPacket) {
    String inPortString = "-" + context.inPacket().receivedFrom().toString() + ":";
    Dhcp6Option interfaceId = new Dhcp6Option();
    interfaceId.setCode(DHCP6.OptionCode.INTERFACE_ID.value());
    byte[] clientSoureMacBytes = clientPacket.getSourceMACAddress();
    byte[] inPortStringBytes = inPortString.getBytes();
    byte[] vlanIdBytes = new byte[2];
    vlanIdBytes[0] = (byte) ((clientPacket.getVlanID() >> 8) & 0xff);
    vlanIdBytes[1] = (byte) (clientPacket.getVlanID() & 0xff);
    byte[] interfaceIdBytes = new byte[clientSoureMacBytes.length + inPortStringBytes.length + vlanIdBytes.length];
    log.debug("Length: interfaceIdBytes  {} clientSoureMacBytes {} inPortStringBytes {} vlan {}", interfaceIdBytes.length, clientSoureMacBytes.length, inPortStringBytes.length, vlanIdBytes.length);
    System.arraycopy(clientSoureMacBytes, 0, interfaceIdBytes, 0, clientSoureMacBytes.length);
    System.arraycopy(inPortStringBytes, 0, interfaceIdBytes, clientSoureMacBytes.length, inPortStringBytes.length);
    System.arraycopy(vlanIdBytes, 0, interfaceIdBytes, clientSoureMacBytes.length + inPortStringBytes.length, vlanIdBytes.length);
    interfaceId.setData(interfaceIdBytes);
    interfaceId.setLength((short) interfaceIdBytes.length);
    log.debug("interfaceId write srcMac {} portString {}, vlanId {}", HexString.toHexString(clientSoureMacBytes, ":"), inPortString, vlanIdBytes);
    return interfaceId;
}

Example 3 with Dhcp6Option

use of org.onlab.packet.dhcp.Dhcp6Option in project onos by opennetworkinglab.

the class Dhcp6HandlerUtil method buildDhcp6PacketFromClient.

/**
 * build the DHCP6 solicit/request packet with gatewayip.
 *
 * @param context packet context
 * @param clientPacket client ethernet packet
 * @param clientInterfaces set of client side interfaces
 * @param serverInfo target server which a packet is generated for
 * @param serverInterface target server interface
 * @return ethernet packet with dhcp6 packet info
 */
public static Ethernet buildDhcp6PacketFromClient(PacketContext context, Ethernet clientPacket, Set<Interface> clientInterfaces, DhcpServerInfo serverInfo, Interface serverInterface) {
    ConnectPoint receivedFrom = context.inPacket().receivedFrom();
    DeviceId receivedFromDevice = receivedFrom.deviceId();
    Ip6Address relayAgentIp = getRelayAgentIPv6Address(clientInterfaces);
    MacAddress relayAgentMac = clientInterfaces.iterator().next().mac();
    if (relayAgentIp == null || relayAgentMac == null) {
        log.warn("Missing DHCP relay agent interface Ipv6 addr config for " + "packet from client on port: {}. Aborting packet processing", clientInterfaces.iterator().next().connectPoint());
        return null;
    }
    IPv6 clientIpv6 = (IPv6) clientPacket.getPayload();
    UDP clientUdp = (UDP) clientIpv6.getPayload();
    DHCP6 clientDhcp6 = (DHCP6) clientUdp.getPayload();
    boolean directConnFlag = directlyConnected(clientDhcp6);
    Ip6Address serverIpFacing = getFirstIpFromInterface(serverInterface);
    if (serverIpFacing == null || serverInterface.mac() == null) {
        log.warn("No IP v6 address for server Interface {}", serverInterface);
        return null;
    }
    Ethernet etherReply = clientPacket.duplicate();
    etherReply.setSourceMACAddress(serverInterface.mac());
    // set default info and replace with indirect if available later on.
    if (serverInfo.getDhcpConnectMac().isPresent()) {
        etherReply.setDestinationMACAddress(serverInfo.getDhcpConnectMac().get());
    }
    if (serverInfo.getDhcpConnectVlan().isPresent()) {
        etherReply.setVlanID(serverInfo.getDhcpConnectVlan().get().toShort());
    }
    IPv6 ipv6Packet = (IPv6) etherReply.getPayload();
    byte[] peerAddress = clientIpv6.getSourceAddress();
    ipv6Packet.setSourceAddress(serverIpFacing.toOctets());
    ipv6Packet.setDestinationAddress(serverInfo.getDhcpServerIp6().get().toOctets());
    UDP udpPacket = (UDP) ipv6Packet.getPayload();
    udpPacket.setSourcePort(UDP.DHCP_V6_SERVER_PORT);
    DHCP6 dhcp6Packet = (DHCP6) udpPacket.getPayload();
    byte[] dhcp6PacketByte = dhcp6Packet.serialize();
    DHCP6 dhcp6Relay = new DHCP6();
    dhcp6Relay.setMsgType(DHCP6.MsgType.RELAY_FORW.value());
    if (directConnFlag) {
        dhcp6Relay.setLinkAddress(relayAgentIp.toOctets());
    } else {
        if (isServerIpEmpty(serverInfo)) {
            log.warn("indirect DhcpServerIp empty... use default server ");
        } else {
            // Check if mac is obtained for valid server ip
            if (isConnectMacEmpty(serverInfo, clientInterfaces)) {
                log.warn("indirect Dhcp ConnectMac empty ...");
                return null;
            }
            etherReply.setDestinationMACAddress(serverInfo.getDhcpConnectMac().get());
            etherReply.setVlanID(serverInfo.getDhcpConnectVlan().get().toShort());
            ipv6Packet.setDestinationAddress(serverInfo.getDhcpServerIp6().get().toOctets());
        }
        if (!serverInfo.getRelayAgentIp6(receivedFromDevice).isPresent()) {
            log.debug("indirect connection: relayAgentIp NOT availale from config file! Use dynamic. {}", HexString.toHexString(relayAgentIp.toOctets(), ":"));
            serverIpFacing = relayAgentIp;
        } else {
            serverIpFacing = serverInfo.getRelayAgentIp6(receivedFromDevice).get();
        }
        log.debug("Source IP address set as relay agent IP with value: {}", serverIpFacing);
        dhcp6Relay.setLinkAddress(serverIpFacing.toOctets());
        ipv6Packet.setSourceAddress(serverIpFacing.toOctets());
    }
    // peer address: address of the client or relay agent from which the message to be relayed was received.
    dhcp6Relay.setPeerAddress(peerAddress);
    // directly connected case, hop count is zero; otherwise, hop count + 1
    if (directConnFlag) {
        dhcp6Relay.setHopCount((byte) 0);
    } else {
        dhcp6Relay.setHopCount((byte) (dhcp6Packet.getHopCount() + 1));
    }
    List<Dhcp6Option> options = new ArrayList<>();
    addDhcp6OptionsFromClient(options, dhcp6PacketByte, context, clientPacket);
    dhcp6Relay.setOptions(options);
    udpPacket.setPayload(dhcp6Relay);
    udpPacket.resetChecksum();
    ipv6Packet.setPayload(udpPacket);
    ipv6Packet.setHopLimit((byte) 64);
    etherReply.setPayload(ipv6Packet);
    return etherReply;
}

Example 4 with Dhcp6Option

use of org.onlab.packet.dhcp.Dhcp6Option in project onos by opennetworkinglab.

the class DhcpRelayManagerTest method buildRelayMsg.

private void buildRelayMsg(DHCP6 dhcp6Relay, byte msgType, Ip6Address linkAddr, Ip6Address peerAddr, byte hop, byte[] interfaceIdBytes, DHCP6 dhcp6Payload) {
    dhcp6Relay.setMsgType(msgType);
    dhcp6Relay.setLinkAddress(linkAddr.toOctets());
    dhcp6Relay.setPeerAddress(peerAddr.toOctets());
    dhcp6Relay.setHopCount(hop);
    List<Dhcp6Option> options = new ArrayList<Dhcp6Option>();
    // interfaceId  option
    Dhcp6Option interfaceId = new Dhcp6Option();
    interfaceId.setCode(DHCP6.OptionCode.INTERFACE_ID.value());
    interfaceId.setData(interfaceIdBytes);
    interfaceId.setLength((short) interfaceIdBytes.length);
    Dhcp6InterfaceIdOption interfaceIdOption = new Dhcp6InterfaceIdOption(interfaceId);
    byte[] optionData = interfaceIdOption.getData();
    ByteBuffer bb = ByteBuffer.wrap(interfaceIdBytes);
    byte[] macAddr = new byte[MacAddress.MAC_ADDRESS_LENGTH];
    byte[] port = new byte[optionData.length - MacAddress.MAC_ADDRESS_LENGTH - VLAN_LEN - SEPARATOR_LEN * 2];
    short vlan;
    bb.get(macAddr);
    // separator
    bb.get();
    bb.get(port);
    // separator
    bb.get();
    vlan = bb.getShort();
    interfaceIdOption.setMacAddress(MacAddress.valueOf(macAddr));
    interfaceIdOption.setInPort(port);
    interfaceIdOption.setVlanId(vlan);
    options.add(interfaceIdOption);
    // relay message option
    Dhcp6Option relayMsgOption = new Dhcp6Option();
    relayMsgOption.setCode(DHCP6.OptionCode.RELAY_MSG.value());
    byte[] dhcp6PayloadByte = dhcp6Payload.serialize();
    relayMsgOption.setLength((short) dhcp6PayloadByte.length);
    relayMsgOption.setPayload(dhcp6Payload);
    Dhcp6RelayOption relayOpt = new Dhcp6RelayOption(relayMsgOption);
    options.add(relayOpt);
    dhcp6Relay.setOptions(options);
}

Example 5 with Dhcp6Option

use of org.onlab.packet.dhcp.Dhcp6Option in project onos by opennetworkinglab.

the class Dhcp6HandlerImpl method processLQ6PacketFromClient.

private List<InternalPacket> processLQ6PacketFromClient(PacketContext context, Ethernet clientPacket, Set<Interface> clientInterfaces, DHCP6 dhcp6Payload) {
    ConnectPoint inPort = context.inPacket().receivedFrom();
    log.info("Got LQ-REQUEST V6 on port {}", inPort);
    List<Dhcp6Option> lopt = dhcp6Payload.getOptions();
    log.info("Options list: {}", lopt);
    Dhcp6LeaseQueryOption lqoption = dhcp6Payload.getOptions().stream().filter(opt -> opt instanceof Dhcp6LeaseQueryOption).map(pld -> (Dhcp6LeaseQueryOption) pld).findFirst().orElse(null);
    if (lqoption == null) {
        // Can't find dhcp payload
        log.warn("Can't find dhcp6 lease query message - aborting");
        return null;
    } else {
        log.info("dhcp6 lqv6 options found: {}", lqoption);
    }
    log.warn("LQv6 for " + lqoption.linkAddress.toString() + " comes from " + inPort.toString());
    Ethernet packet = context.inPacket().parsed();
    Ip6Address clientAddress = lqoption.linkAddress;
    IPv6 ipv6Packet = (IPv6) packet.getPayload();
    Ip6Address nextHopIp = findNextHopIp6FromRelayStore(clientAddress);
    // 1. only if there is a route to remove - remove it
    if (nextHopIp != null) {
        Route routeForIP6 = new Route(Route.Source.DHCP, clientAddress.toIpPrefix(), nextHopIp);
        log.debug("Removing route of Client " + clientAddress + " for indirectly connected - next hop ip6 " + nextHopIp);
        routeStore.removeRoute(routeForIP6);
    }
    // 2. note the potential NH this packet came from in case it's a known lease
    // this NH will then be used to build the route
    MacAddress potentialNH = packet.getSourceMAC();
    VlanId vlanId = VlanId.vlanId(packet.getVlanID());
    setPotentialNextHopForIp6InRelayStore(clientAddress, vlanId, potentialNH);
    // 3. route this LQ6 to all relevant servers
    IPv6 clientIpv6 = (IPv6) clientPacket.getPayload();
    UDP clientUdp = (UDP) clientIpv6.getPayload();
    DHCP6 clientDhcp6 = (DHCP6) clientUdp.getPayload();
    boolean directConnFlag = Dhcp6HandlerUtil.directlyConnected(clientDhcp6);
    boolean serverFound = false;
    List<InternalPacket> internalPackets = new ArrayList<>();
    List<DhcpServerInfo> serverInfoList = findValidServerInfo(directConnFlag);
    List<DhcpServerInfo> copyServerInfoList = new ArrayList<DhcpServerInfo>(serverInfoList);
    for (DhcpServerInfo serverInfo : copyServerInfoList) {
        if (!Dhcp6HandlerUtil.checkDhcpServerConnPt(directConnFlag, serverInfo)) {
            log.warn("Can't get server connect point, ignore");
            continue;
        }
        DhcpServerInfo newServerInfo = getHostInfoForServerInfo(serverInfo, serverInfoList);
        if (newServerInfo == null) {
            log.debug("Can't get server interface with host info resolved, ignore serverInfo {} serverInfoList {}", serverInfo, serverInfoList);
            continue;
        }
        Interface serverInterface = getServerInterface(newServerInfo);
        if (serverInterface == null) {
            log.debug("Can't get server interface, ignore for serverInfo {}, serverInfoList {}", serverInfo, serverInfoList);
            continue;
        }
        serverFound = true;
        log.debug("Server Info Found {}", serverInfo.getDhcpConnectMac());
        Ethernet etherRouted = (Ethernet) clientPacket.clone();
        MacAddress macFacingServer = serverInterface.mac();
        if (macFacingServer == null) {
            log.warn("No MAC address for server Interface {}", serverInterface);
            return null;
        }
        etherRouted.setSourceMACAddress(macFacingServer);
        etherRouted.setDestinationMACAddress(newServerInfo.getDhcpConnectMac().get());
        InternalPacket internalPacket = InternalPacket.internalPacket(etherRouted, serverInfo.getDhcpServerConnectPoint().get());
        internalPackets.add(internalPacket);
        log.debug("Sending LQ to DHCP server {}", newServerInfo.getDhcpServerIp6());
    }
    if (!serverFound) {
        log.warn("ProcessDhcp6PacketFromClient No Server Found");
    }
    log.debug("num of client packets to send is{}", internalPackets.size());
    return internalPackets;
}