Examples with ARP org.onlab.packet.ARP used on opensource projects

Example 6 with ARP

use of org.onlab.packet.ARP in project onos by opennetworkinglab.

the class CastorArpManager method createArpContext.

/**
 * Extracts context information from ARP packets.
 *
 * @param eth input Ethernet frame that is thought to be ARP
 * @param inPort in port
 * @return MessageContext object if the packet was a valid ARP packet,
 * otherwise null
 */
private MessageContext createArpContext(Ethernet eth, ConnectPoint inPort) {
    if (eth.getEtherType() != Ethernet.TYPE_ARP) {
        return null;
    }
    ARP arp = (ARP) eth.getPayload();
    IpAddress target = Ip4Address.valueOf(arp.getTargetProtocolAddress());
    IpAddress sender = Ip4Address.valueOf(arp.getSenderProtocolAddress());
    MessageType type;
    if (arp.getOpCode() == ARP.OP_REQUEST) {
        type = MessageType.REQUEST;
    } else if (arp.getOpCode() == ARP.OP_REPLY) {
        type = MessageType.REPLY;
    } else {
        return null;
    }
    return new MessageContext(eth, inPort, Protocol.ARP, type, target, sender);
}

Example 7 with ARP

use of org.onlab.packet.ARP in project onos by opennetworkinglab.

the class CastorArpManager method buildArpRequest.

/**
 * Builds the ARP request when MAC is not known.
 *
 * @param peer The Peer whose MAC is not known.
 * @return Ethernet
 */
private Ethernet buildArpRequest(Peer peer) {
    ARP arp = new ARP();
    arp.setHardwareType(ARP.HW_TYPE_ETHERNET).setHardwareAddressLength((byte) Ethernet.DATALAYER_ADDRESS_LENGTH).setProtocolType(ARP.PROTO_TYPE_IP).setProtocolAddressLength((byte) IpAddress.INET_BYTE_LENGTH).setOpCode(ARP.OP_REQUEST);
    arp.setSenderHardwareAddress(ARP_SOURCEMAC.toBytes()).setSenderProtocolAddress(ARP_SRC.toOctets()).setTargetHardwareAddress(ZERO_MAC_ADDRESS).setTargetProtocolAddress(IpAddress.valueOf(peer.getIpAddress()).toOctets());
    Ethernet ethernet = new Ethernet();
    ethernet.setEtherType(Ethernet.TYPE_ARP).setDestinationMACAddress(MacAddress.BROADCAST).setSourceMACAddress(ARP_SOURCEMAC).setPayload(arp);
    ethernet.setPad(true);
    return ethernet;
}

Example 8 with ARP

use of org.onlab.packet.ARP in project onos by opennetworkinglab.

the class K8sRoutingArpHandler method processArpPacket.

private void processArpPacket(PacketContext context, Ethernet ethernet) {
    DeviceId deviceId = context.inPacket().receivedFrom().deviceId();
    if (!allK8sDevices(k8sNodeService, k8sHostService).contains(deviceId)) {
        return;
    }
    ARP arp = (ARP) ethernet.getPayload();
    if (arp.getOpCode() == ARP.OP_REPLY) {
        IpAddress spa = Ip4Address.valueOf(arp.getSenderProtocolAddress());
        MacAddress sha = MacAddress.valueOf(arp.getSenderHardwareAddress());
        log.info("ARP reply from ip: {}, mac: {}", spa, sha);
        Set<IpAddress> gatewayIps = k8sNodeService.completeNodes().stream().map(K8sNode::extGatewayIp).collect(Collectors.toSet());
        if (!gatewayIps.contains(spa)) {
            return;
        }
        log.info("ARP reply from external gateway ip: {}, mac: {}", spa, sha);
        k8sNodeService.completeNodes().stream().filter(n -> n.extGatewayMac() == null).forEach(n -> {
            K8sNode updated = n.updateExtGatewayMac(sha);
            k8sNodeService.updateNode(updated);
        });
    }
}

Example 9 with ARP

use of org.onlab.packet.ARP in project onos by opennetworkinglab.

the class K8sSwitchingArpHandler method processPacketIn.

/**
 * Processes ARP request packets.
 *
 * @param context   packet context
 * @param ethPacket ethernet packet
 */
private void processPacketIn(PacketContext context, Ethernet ethPacket) {
    // if the ARP mode is configured as broadcast mode, we simply ignore ARP packet_in
    if (ARP_BROADCAST_MODE.equals(getArpMode())) {
        return;
    }
    DeviceId deviceId = context.inPacket().receivedFrom().deviceId();
    if (!allK8sDevices(k8sNodeService, k8sHostService).contains(deviceId)) {
        return;
    }
    ARP arpPacket = (ARP) ethPacket.getPayload();
    if (arpPacket.getOpCode() == ARP.OP_REQUEST) {
        processArpRequest(context, ethPacket);
    } else if (arpPacket.getOpCode() == ARP.OP_REPLY) {
        processArpReply(context, ethPacket);
    }
}

Example 10 with ARP

use of org.onlab.packet.ARP in project onos by opennetworkinglab.

the class K8sSwitchingArpHandler method processArpRequest.

private void processArpRequest(PacketContext context, Ethernet ethPacket) {
    ARP arpPacket = (ARP) ethPacket.getPayload();
    K8sPort srcK8sPort = k8sNetworkService.ports().stream().filter(p -> p.macAddress().equals(ethPacket.getSourceMAC())).findAny().orElse(null);
    PortNumber srcPortNum = context.inPacket().receivedFrom().port();
    DeviceId srcDeviceId = context.inPacket().receivedFrom().deviceId();
    boolean isEntryPort = false;
    for (K8sNode node : k8sNodeService.completeNodes()) {
        if (srcDeviceId.equals(node.intgBridge()) && srcPortNum.equals(node.intgEntryPortNum())) {
            isEntryPort = true;
        }
    }
    // integration bridge entry port, we simply ignore the ARP request...
    if (srcK8sPort == null && !isEntryPort) {
        log.warn("Failed to find source port(MAC:{})", ethPacket.getSourceMAC());
        return;
    }
    IpAddress targetIp = Ip4Address.valueOf(arpPacket.getTargetProtocolAddress());
    // look up the MAC address from regular k8s ports
    MacAddress replyMac = k8sNetworkService.ports().stream().filter(p -> p.ipAddress().equals(targetIp)).map(K8sPort::macAddress).findAny().orElse(null);
    // look up the MAC address from special integration entry port (e.g., LOCAL, k8s-int-os)
    for (K8sNetwork network : k8sNetworkService.networks()) {
        if (network.gatewayIp().equals(targetIp)) {
            K8sNode node = k8sNodeService.node(network.name());
            replyMac = node.intgEntryPortMac();
        }
    }
    if (replyMac == null) {
        String cidr = k8sNetworkService.networks().stream().map(K8sNetwork::cidr).findAny().orElse(null);
        if (cidr != null) {
            String unshiftedIp = unshiftIpDomain(targetIp.toString(), SHIFTED_IP_PREFIX, cidr);
            replyMac = k8sNetworkService.ports().stream().filter(p -> p.ipAddress().equals(IpAddress.valueOf(unshiftedIp))).map(K8sPort::macAddress).findAny().orElse(null);
        }
    }
    if (replyMac == null) {
        Set<String> serviceIps = k8sServiceService.services().stream().map(s -> s.getSpec().getClusterIP()).collect(Collectors.toSet());
        if (serviceIps.contains(targetIp.toString())) {
            replyMac = MacAddress.valueOf(SERVICE_FAKE_MAC_STR);
        }
    }
    if (replyMac == null) {
        if (targetIp.toString().startsWith(NODE_IP_PREFIX)) {
            String targetIpPrefix = targetIp.toString().split("\\.")[1];
            String nodePrefix = NODE_IP_PREFIX + "." + targetIpPrefix;
            String origNodeCidr = k8sNodeService.completeNodes().stream().map(n -> n.nodeIp().toString()).findAny().orElse(null);
            if (origNodeCidr != null) {
                String origNodeIp = unshiftIpDomain(targetIp.toString(), nodePrefix, origNodeCidr);
                IpPrefix k8sNodeIpCidr = IpPrefix.valueOf(IpAddress.valueOf(origNodeCidr), 24);
                SubnetUtils k8sNodeSubnet = new SubnetUtils(k8sNodeIpCidr.toString());
                String k8sNodeGateway = getGatewayIp(k8sNodeIpCidr.toString()).toString();
                String seekIp = "";
                if (!k8sNodeSubnet.getInfo().isInRange(origNodeIp)) {
                    replyMac = extHostMacStore.asJavaMap().get(IpAddress.valueOf(k8sNodeGateway));
                    seekIp = k8sNodeGateway;
                } else {
                    replyMac = extHostMacStore.asJavaMap().get(IpAddress.valueOf(origNodeIp));
                    seekIp = origNodeIp;
                }
                // we need to manually learn their MAC addresses
                if (replyMac == null) {
                    ConnectPoint cp = context.inPacket().receivedFrom();
                    K8sNode k8sNode = k8sNodeService.node(cp.deviceId());
                    if (k8sNode != null) {
                        // we use fake IP and MAC address as a source to
                        // query destination MAC address
                        setArpRequest(MacAddress.valueOf(NODE_FAKE_MAC_STR).toBytes(), IpAddress.valueOf(NODE_FAKE_IP_STR).toOctets(), IpAddress.valueOf(seekIp).toOctets(), k8sNode);
                        context.block();
                        return;
                    }
                }
            }
        }
    }
    if (replyMac == null) {
        replyMac = MacAddress.valueOf(gatewayMac);
    }
    Ethernet ethReply = ARP.buildArpReply(targetIp.getIp4Address(), replyMac, ethPacket);
    TrafficTreatment treatment = DefaultTrafficTreatment.builder().setOutput(context.inPacket().receivedFrom().port()).build();
    packetService.emit(new DefaultOutboundPacket(context.inPacket().receivedFrom().deviceId(), treatment, ByteBuffer.wrap(ethReply.serialize())));
    context.block();
}