private void populateRoutingRulestoSameNode(
Ip4Address vmIp,
MacAddress vmMac,
PortNumber port,
DeviceId deviceId,
long vni,
String cidr) {
TrafficSelector.Builder sBuilder = DefaultTrafficSelector.builder();
TrafficTreatment.Builder tBuilder = DefaultTrafficTreatment.builder();
// FIXME: we need to check the VNI of the dest IP also just in case...
sBuilder
.matchEthType(Ethernet.TYPE_IPV4)
.matchIPDst(vmIp.toIpPrefix())
.matchIPSrc(IpPrefix.valueOf(cidr))
.matchTunnelId(vni);
tBuilder.setEthDst(vmMac).setOutput(port);
ForwardingObjective fo =
DefaultForwardingObjective.builder()
.withSelector(sBuilder.build())
.withTreatment(tBuilder.build())
.withPriority(EW_ROUTING_RULE_PRIORITY)
.withFlag(ForwardingObjective.Flag.SPECIFIC)
.fromApp(appId)
.add();
flowObjectiveService.forward(deviceId, fo);
}
private void populateRoutingRulestoDifferentNode(
Ip4Address vmIp, long vni, DeviceId deviceId, Ip4Address hostIp, String cidr) {
TrafficSelector.Builder sBuilder = DefaultTrafficSelector.builder();
TrafficTreatment.Builder tBuilder = DefaultTrafficTreatment.builder();
sBuilder
.matchEthType(Ethernet.TYPE_IPV4)
.matchTunnelId(vni)
.matchIPSrc(IpPrefix.valueOf(cidr))
.matchIPDst(vmIp.toIpPrefix());
tBuilder
.extension(buildExtension(deviceService, deviceId, hostIp), deviceId)
.setOutput(nodeService.tunnelPort(deviceId).get());
ForwardingObjective fo =
DefaultForwardingObjective.builder()
.withSelector(sBuilder.build())
.withTreatment(tBuilder.build())
.withPriority(EW_ROUTING_RULE_PRIORITY)
.withFlag(ForwardingObjective.Flag.SPECIFIC)
.fromApp(appId)
.add();
flowObjectiveService.forward(deviceId, fo);
}
private void removeExternalRules(OpenstackNetwork osNet, String subNetCidr) {
TrafficSelector.Builder sBuilder = DefaultTrafficSelector.builder();
sBuilder
.matchEthType(Ethernet.TYPE_IPV4)
.matchTunnelId(Long.valueOf(osNet.segmentId()))
.matchIPSrc(IpPrefix.valueOf(subNetCidr))
.matchEthDst(Constants.DEFAULT_GATEWAY_MAC);
nodeService
.completeNodes()
.forEach(
node -> {
ForwardingObjective.Flag flag =
node.type().equals(GATEWAY)
? ForwardingObjective.Flag.VERSATILE
: ForwardingObjective.Flag.SPECIFIC;
RulePopulatorUtil.removeRule(
flowObjectiveService,
appId,
node.intBridge(),
sBuilder.build(),
flag,
ROUTING_RULE_PRIORITY);
});
}
private TrafficSelector buildSelector(Criterion... criteria) {
TrafficSelector.Builder sBuilder = DefaultTrafficSelector.builder();
for (Criterion c : criteria) {
sBuilder.add(c);
}
return sBuilder.build();
}
/**
* Constructs a BGP intent and put it into the intentList.
*
* <p>The purpose of this method is too simplify the setUpBgpIntents() method, and to make the
* setUpBgpIntents() easy to read.
*
* @param srcVlanId ingress VlanId
* @param dstVlanId egress VlanId
* @param srcPrefix source IP prefix to match
* @param dstPrefix destination IP prefix to match
* @param srcTcpPort source TCP port to match
* @param dstTcpPort destination TCP port to match
* @param srcConnectPoint source connect point for PointToPointIntent
* @param dstConnectPoint destination connect point for PointToPointIntent
*/
private void bgpPathintentConstructor(
VlanId srcVlanId,
VlanId dstVlanId,
String srcPrefix,
String dstPrefix,
Short srcTcpPort,
Short dstTcpPort,
ConnectPoint srcConnectPoint,
ConnectPoint dstConnectPoint) {
TrafficSelector.Builder builder =
DefaultTrafficSelector.builder()
.matchEthType(Ethernet.TYPE_IPV4)
.matchIPProtocol(IPv4.PROTOCOL_TCP)
.matchIPSrc(IpPrefix.valueOf(srcPrefix))
.matchIPDst(IpPrefix.valueOf(dstPrefix));
if (!srcVlanId.equals(VlanId.NONE)) {
builder.matchVlanId(srcVlanId);
}
TrafficTreatment.Builder treatment = DefaultTrafficTreatment.builder();
if (!dstVlanId.equals(VlanId.NONE)) {
treatment.setVlanId(dstVlanId);
}
if (srcTcpPort != null) {
builder.matchTcpSrc(TpPort.tpPort(srcTcpPort));
}
if (dstTcpPort != null) {
builder.matchTcpDst(TpPort.tpPort(dstTcpPort));
}
Key key =
Key.of(
srcPrefix.split("/")[0]
+ "-"
+ dstPrefix.split("/")[0]
+ "-"
+ ((srcTcpPort == null) ? "dst" : "src"),
APPID);
PointToPointIntent intent =
PointToPointIntent.builder()
.appId(APPID)
.key(key)
.selector(builder.build())
.treatment(treatment.build())
.ingressPoint(srcConnectPoint)
.egressPoint(dstConnectPoint)
.build();
intentList.add(intent);
}
private void prepareInstallation() {
Set<ControllerNode> instances = Sets.newHashSet(clusterService.getNodes());
instances.remove(clusterService.getLocalNode());
Set<NodeId> acceptableNodes = Sets.newHashSet();
if (neighbours >= instances.size()) {
instances.forEach(instance -> acceptableNodes.add(instance.id()));
} else {
Iterator<ControllerNode> nodes = instances.iterator();
for (int i = neighbours; i > 0; i--) {
acceptableNodes.add(nodes.next().id());
}
}
acceptableNodes.add(clusterService.getLocalNode().id());
Set<Device> devices = Sets.newHashSet();
for (Device dev : deviceService.getDevices()) {
if (acceptableNodes.contains(mastershipService.getMasterFor(dev.id()))) {
devices.add(dev);
}
}
TrafficTreatment treatment =
DefaultTrafficTreatment.builder()
.setOutput(PortNumber.portNumber(RandomUtils.nextInt()))
.build();
TrafficSelector.Builder sbuilder;
FlowRuleOperations.Builder rules = FlowRuleOperations.builder();
FlowRuleOperations.Builder remove = FlowRuleOperations.builder();
for (Device d : devices) {
for (int i = 0; i < this.flowPerDevice; i++) {
sbuilder = DefaultTrafficSelector.builder();
sbuilder
.matchEthSrc(MacAddress.valueOf(RandomUtils.nextInt() * i))
.matchEthDst(MacAddress.valueOf((Integer.MAX_VALUE - i) * RandomUtils.nextInt()));
int randomPriority = RandomUtils.nextInt();
FlowRule f =
DefaultFlowRule.builder()
.forDevice(d.id())
.withSelector(sbuilder.build())
.withTreatment(treatment)
.withPriority(randomPriority)
.fromApp(appId)
.makeTemporary(10)
.build();
rules.add(f);
remove.remove(f);
}
}
this.adds = rules;
this.removes = remove;
}
@Override
public TrafficSelector decode(ObjectNode json, CodecContext context) {
final JsonCodec<Criterion> criterionCodec = context.codec(Criterion.class);
JsonNode criteriaJson = json.get(CRITERIA);
TrafficSelector.Builder builder = DefaultTrafficSelector.builder();
if (criteriaJson != null) {
IntStream.range(0, criteriaJson.size())
.forEach(i -> builder.add(criterionCodec.decode(get(criteriaJson, i), context)));
}
return builder.build();
}
@Activate
public void activate(ComponentContext context) {
appId = coreService.registerApplication("org.onosproject.provider.host");
modified(context);
providerService = providerRegistry.register(this);
pktService.addProcessor(processor, 1);
deviceService.addListener(deviceListener);
TrafficSelector.Builder selectorBuilder = DefaultTrafficSelector.builder();
selectorBuilder.matchEthType(Ethernet.TYPE_ARP);
pktService.requestPackets(selectorBuilder.build(), PacketPriority.CONTROL, appId);
log.info("Started");
}
private void removeGatewayIcmpRule(Ip4Address gatewayIp, DeviceId deviceId) {
TrafficSelector.Builder sBuilder = DefaultTrafficSelector.builder();
sBuilder
.matchEthType(Ethernet.TYPE_IPV4)
.matchIPProtocol(IPv4.PROTOCOL_ICMP)
.matchIPDst(gatewayIp.toIpPrefix());
RulePopulatorUtil.removeRule(
flowObjectiveService,
appId,
deviceId,
sBuilder.build(),
ForwardingObjective.Flag.VERSATILE,
GATEWAY_ICMP_PRIORITY);
}
private void populateRuleToGateway(DeviceId deviceId, GroupId groupId, long vni, String cidr) {
TrafficSelector.Builder sBuilder = DefaultTrafficSelector.builder();
TrafficTreatment.Builder tBuilder = DefaultTrafficTreatment.builder();
sBuilder
.matchEthType(Ethernet.TYPE_IPV4)
.matchTunnelId(vni)
.matchIPSrc(IpPrefix.valueOf(cidr))
.matchEthDst(Constants.DEFAULT_GATEWAY_MAC);
tBuilder.group(groupId);
ForwardingObjective fo =
DefaultForwardingObjective.builder()
.withSelector(sBuilder.build())
.withTreatment(tBuilder.build())
.withFlag(ForwardingObjective.Flag.SPECIFIC)
.withPriority(ROUTING_RULE_PRIORITY)
.fromApp(appId)
.add();
flowObjectiveService.forward(deviceId, fo);
}
private void populateGatewayIcmpRule(Ip4Address gatewayIp, DeviceId deviceId) {
TrafficSelector.Builder sBuilder = DefaultTrafficSelector.builder();
TrafficTreatment.Builder tBuilder = DefaultTrafficTreatment.builder();
sBuilder
.matchEthType(Ethernet.TYPE_IPV4)
.matchIPProtocol(IPv4.PROTOCOL_ICMP)
.matchIPDst(gatewayIp.toIpPrefix());
tBuilder.setOutput(PortNumber.CONTROLLER);
ForwardingObjective fo =
DefaultForwardingObjective.builder()
.withSelector(sBuilder.build())
.withTreatment(tBuilder.build())
.withPriority(GATEWAY_ICMP_PRIORITY)
.withFlag(ForwardingObjective.Flag.VERSATILE)
.fromApp(appId)
.add();
flowObjectiveService.forward(deviceId, fo);
}
/** Request packet in via PacketService. */
private void requestPackests() {
TrafficSelector.Builder selector = DefaultTrafficSelector.builder();
selector.matchEthType(Ethernet.TYPE_IPV4);
packetService.requestPackets(selector.build(), PacketPriority.REACTIVE, appId);
selector.matchEthType(Ethernet.TYPE_ARP);
packetService.requestPackets(selector.build(), PacketPriority.REACTIVE, appId);
if (ipv6Forwarding) {
selector.matchEthType(Ethernet.TYPE_IPV6);
packetService.requestPackets(selector.build(), PacketPriority.REACTIVE, appId);
}
}
/**
* Builds a Multi Point to Single Point intent.
*
* @param key The intent key
* @param srcs The source Connect Points
* @param dst The destination Connect Point
* @return Multi Point to Single Point intent generated.
*/
private MultiPointToSinglePointIntent buildUniIntent(
Key key, Set<ConnectPoint> srcs, ConnectPoint dst, VlanId vlanId, MacAddress mac) {
MultiPointToSinglePointIntent intent;
TrafficTreatment treatment = DefaultTrafficTreatment.emptyTreatment();
TrafficSelector.Builder builder =
DefaultTrafficSelector.builder().matchEthDst(mac).matchVlanId(vlanId);
TrafficSelector selector = builder.build();
intent =
MultiPointToSinglePointIntent.builder()
.appId(APPID)
.key(key)
.selector(selector)
.treatment(treatment)
.ingressPoints(srcs)
.egressPoint(dst)
.priority(PRIORITY_OFFSET)
.build();
return intent;
}
private void removeRoutingRules(Host host, Set<OpenstackSubnet> osSubNets) {
String osSubNetId = host.annotations().value(SUBNET_ID);
if (osSubNetId == null) {
return;
}
Map<String, String> vniMap = new HashMap<>();
openstackService.networks().stream().forEach(n -> vniMap.put(n.id(), n.segmentId()));
osSubNets
.stream()
.filter(osSubNet -> !osSubNet.id().equals(osSubNetId))
.forEach(
osSubNet -> {
TrafficSelector.Builder sBuilder = DefaultTrafficSelector.builder();
sBuilder
.matchEthType(Ethernet.TYPE_IPV4)
.matchIPDst(host.ipAddresses().stream().findFirst().get().toIpPrefix())
.matchIPSrc(IpPrefix.valueOf(osSubNet.cidr()))
.matchTunnelId(Long.valueOf(vniMap.get(osSubNet.networkId())));
nodeService
.completeNodes()
.stream()
.filter(node -> node.type().equals(COMPUTE))
.forEach(
node ->
RulePopulatorUtil.removeRule(
flowObjectiveService,
appId,
node.intBridge(),
sBuilder.build(),
ForwardingObjective.Flag.SPECIFIC,
EW_ROUTING_RULE_PRIORITY));
});
log.debug("Removed routing rule from {} to {}", host, osSubNets);
}
private void populateGatewayToController(long vni, String subNetCidr) {
TrafficSelector.Builder sBuilder = DefaultTrafficSelector.builder();
TrafficTreatment.Builder tBuilder = DefaultTrafficTreatment.builder();
sBuilder
.matchEthType(Ethernet.TYPE_IPV4)
.matchTunnelId(vni)
.matchIPSrc(IpPrefix.valueOf(subNetCidr))
.matchEthDst(Constants.DEFAULT_GATEWAY_MAC);
tBuilder.setOutput(PortNumber.CONTROLLER);
ForwardingObjective fo =
DefaultForwardingObjective.builder()
.withSelector(sBuilder.build())
.withTreatment(tBuilder.build())
.withFlag(ForwardingObjective.Flag.VERSATILE)
.withPriority(ROUTING_RULE_PRIORITY)
.fromApp(appId)
.add();
gatewayService
.getGatewayDeviceIds()
.forEach(deviceId -> flowObjectiveService.forward(deviceId, fo));
}
// Install a rule forwarding the packet to the specified port.
private void installRule(PacketContext context, PortNumber portNumber) {
//
// We don't support (yet) buffer IDs in the Flow Service so
// packet out first.
//
Ethernet inPkt = context.inPacket().parsed();
TrafficSelector.Builder selectorBuilder = DefaultTrafficSelector.builder();
// If PacketOutOnly or ARP packet than forward directly to output port
if (packetOutOnly || inPkt.getEtherType() == Ethernet.TYPE_ARP) {
packetOut(context, portNumber);
return;
}
//
// If matchDstMacOnly
// Create flows matching dstMac only
// Else
// Create flows with default matching and include configured fields
//
if (matchDstMacOnly) {
selectorBuilder.matchEthDst(inPkt.getDestinationMAC());
} else {
selectorBuilder
.matchInPort(context.inPacket().receivedFrom().port())
.matchEthSrc(inPkt.getSourceMAC())
.matchEthDst(inPkt.getDestinationMAC());
// If configured Match Vlan ID
if (matchVlanId && inPkt.getVlanID() != Ethernet.VLAN_UNTAGGED) {
selectorBuilder.matchVlanId(VlanId.vlanId(inPkt.getVlanID()));
}
//
// If configured and EtherType is IPv4 - Match IPv4 and
// TCP/UDP/ICMP fields
//
if (matchIpv4Address && inPkt.getEtherType() == Ethernet.TYPE_IPV4) {
IPv4 ipv4Packet = (IPv4) inPkt.getPayload();
byte ipv4Protocol = ipv4Packet.getProtocol();
Ip4Prefix matchIp4SrcPrefix =
Ip4Prefix.valueOf(ipv4Packet.getSourceAddress(), Ip4Prefix.MAX_MASK_LENGTH);
Ip4Prefix matchIp4DstPrefix =
Ip4Prefix.valueOf(ipv4Packet.getDestinationAddress(), Ip4Prefix.MAX_MASK_LENGTH);
selectorBuilder
.matchEthType(Ethernet.TYPE_IPV4)
.matchIPSrc(matchIp4SrcPrefix)
.matchIPDst(matchIp4DstPrefix);
if (matchIpv4Dscp) {
byte dscp = ipv4Packet.getDscp();
byte ecn = ipv4Packet.getEcn();
selectorBuilder.matchIPDscp(dscp).matchIPEcn(ecn);
}
if (matchTcpUdpPorts && ipv4Protocol == IPv4.PROTOCOL_TCP) {
TCP tcpPacket = (TCP) ipv4Packet.getPayload();
selectorBuilder
.matchIPProtocol(ipv4Protocol)
.matchTcpSrc(tcpPacket.getSourcePort())
.matchTcpDst(tcpPacket.getDestinationPort());
}
if (matchTcpUdpPorts && ipv4Protocol == IPv4.PROTOCOL_UDP) {
UDP udpPacket = (UDP) ipv4Packet.getPayload();
selectorBuilder
.matchIPProtocol(ipv4Protocol)
.matchUdpSrc(udpPacket.getSourcePort())
.matchUdpDst(udpPacket.getDestinationPort());
}
if (matchIcmpFields && ipv4Protocol == IPv4.PROTOCOL_ICMP) {
ICMP icmpPacket = (ICMP) ipv4Packet.getPayload();
selectorBuilder
.matchIPProtocol(ipv4Protocol)
.matchIcmpType(icmpPacket.getIcmpType())
.matchIcmpCode(icmpPacket.getIcmpCode());
}
}
//
// If configured and EtherType is IPv6 - Match IPv6 and
// TCP/UDP/ICMP fields
//
if (matchIpv6Address && inPkt.getEtherType() == Ethernet.TYPE_IPV6) {
IPv6 ipv6Packet = (IPv6) inPkt.getPayload();
byte ipv6NextHeader = ipv6Packet.getNextHeader();
Ip6Prefix matchIp6SrcPrefix =
Ip6Prefix.valueOf(ipv6Packet.getSourceAddress(), Ip6Prefix.MAX_MASK_LENGTH);
Ip6Prefix matchIp6DstPrefix =
Ip6Prefix.valueOf(ipv6Packet.getDestinationAddress(), Ip6Prefix.MAX_MASK_LENGTH);
selectorBuilder
.matchEthType(Ethernet.TYPE_IPV6)
.matchIPv6Src(matchIp6SrcPrefix)
.matchIPv6Dst(matchIp6DstPrefix);
if (matchIpv6FlowLabel) {
selectorBuilder.matchIPv6FlowLabel(ipv6Packet.getFlowLabel());
}
if (matchTcpUdpPorts && ipv6NextHeader == IPv6.PROTOCOL_TCP) {
TCP tcpPacket = (TCP) ipv6Packet.getPayload();
selectorBuilder
.matchIPProtocol(ipv6NextHeader)
.matchTcpSrc(tcpPacket.getSourcePort())
.matchTcpDst(tcpPacket.getDestinationPort());
}
if (matchTcpUdpPorts && ipv6NextHeader == IPv6.PROTOCOL_UDP) {
UDP udpPacket = (UDP) ipv6Packet.getPayload();
selectorBuilder
.matchIPProtocol(ipv6NextHeader)
.matchUdpSrc(udpPacket.getSourcePort())
.matchUdpDst(udpPacket.getDestinationPort());
}
if (matchIcmpFields && ipv6NextHeader == IPv6.PROTOCOL_ICMP6) {
ICMP6 icmp6Packet = (ICMP6) ipv6Packet.getPayload();
selectorBuilder
.matchIPProtocol(ipv6NextHeader)
.matchIcmpv6Type(icmp6Packet.getIcmpType())
.matchIcmpv6Code(icmp6Packet.getIcmpCode());
}
}
}
TrafficTreatment treatment = DefaultTrafficTreatment.builder().setOutput(portNumber).build();
ForwardingObjective forwardingObjective =
DefaultForwardingObjective.builder()
.withSelector(selectorBuilder.build())
.withTreatment(treatment)
.withPriority(flowPriority)
.withFlag(ForwardingObjective.Flag.VERSATILE)
.fromApp(appId)
.makeTemporary(flowTimeout)
.add();
flowObjectiveService.forward(context.inPacket().receivedFrom().deviceId(), forwardingObjective);
//
// If packetOutOfppTable
// Send packet back to the OpenFlow pipeline to match installed flow
// Else
// Send packet direction on the appropriate port
//
if (packetOutOfppTable) {
packetOut(context, PortNumber.TABLE);
} else {
packetOut(context, portNumber);
}
}
@Override
// Dell switches need ETH_DST based match condition in all IP table entries.
// So this method overrides the default spring-open behavior and adds
// ETH_DST match condition while pushing IP table flow rules
protected Collection<FlowRule> processSpecific(ForwardingObjective fwd) {
log.debug("Processing specific");
TrafficSelector selector = fwd.selector();
EthTypeCriterion ethType = (EthTypeCriterion) selector.getCriterion(Criterion.Type.ETH_TYPE);
if ((ethType == null)
|| ((((short) ethType.ethType()) != Ethernet.TYPE_IPV4)
&& (((short) ethType.ethType()) != Ethernet.MPLS_UNICAST))) {
log.debug("processSpecific: Unsupported " + "forwarding objective criteraia");
fail(fwd, ObjectiveError.UNSUPPORTED);
return Collections.emptySet();
}
TrafficSelector.Builder filteredSelectorBuilder = DefaultTrafficSelector.builder();
int forTableId = -1;
if (((short) ethType.ethType()) == Ethernet.TYPE_IPV4) {
if (deviceTMac == null) {
log.debug(
"processSpecific: ETH_DST filtering "
+ "objective is not set which is required "
+ "before sending a IPv4 forwarding objective");
// TODO: Map the error to more appropriate error code.
fail(fwd, ObjectiveError.DEVICEMISSING);
return Collections.emptySet();
}
filteredSelectorBuilder =
filteredSelectorBuilder
.matchEthType(Ethernet.TYPE_IPV4)
.matchEthDst(deviceTMac)
.matchIPDst(((IPCriterion) selector.getCriterion(Criterion.Type.IPV4_DST)).ip());
forTableId = ipv4UnicastTableId;
log.debug("processing IPv4 specific forwarding objective");
} else {
filteredSelectorBuilder =
filteredSelectorBuilder
.matchEthType(Ethernet.MPLS_UNICAST)
.matchMplsLabel(
((MplsCriterion) selector.getCriterion(Criterion.Type.MPLS_LABEL)).label());
// TODO: Add Match for BoS
// if (selector.getCriterion(Criterion.Type.MPLS_BOS) != null) {
// }
forTableId = mplsTableId;
log.debug("processing MPLS specific forwarding objective");
}
TrafficTreatment.Builder treatmentBuilder = DefaultTrafficTreatment.builder();
if (fwd.treatment() != null) {
for (Instruction i : fwd.treatment().allInstructions()) {
treatmentBuilder.add(i);
}
}
if (fwd.nextId() != null) {
NextGroup next = flowObjectiveStore.getNextGroup(fwd.nextId());
if (next != null) {
GroupKey key = appKryo.deserialize(next.data());
Group group = groupService.getGroup(deviceId, key);
if (group == null) {
log.warn("The group left!");
fail(fwd, ObjectiveError.GROUPMISSING);
return Collections.emptySet();
}
treatmentBuilder.group(group.id());
log.debug("Adding OUTGROUP action");
} else {
log.warn("processSpecific: No associated next objective object");
fail(fwd, ObjectiveError.GROUPMISSING);
return Collections.emptySet();
}
}
TrafficSelector filteredSelector = filteredSelectorBuilder.build();
TrafficTreatment treatment = treatmentBuilder.transition(aclTableId).build();
FlowRule.Builder ruleBuilder =
DefaultFlowRule.builder()
.fromApp(fwd.appId())
.withPriority(fwd.priority())
.forDevice(deviceId)
.withSelector(filteredSelector)
.withTreatment(treatment);
if (fwd.permanent()) {
ruleBuilder.makePermanent();
} else {
ruleBuilder.makeTemporary(fwd.timeout());
}
ruleBuilder.forTable(forTableId);
return Collections.singletonList(ruleBuilder.build());
}
/**
* Generates a route intent for a prefix, the next hop IP address, and the next hop MAC address.
*
* <p>This method will find the egress interface for the intent. Intent will match dst IP prefix
* and rewrite dst MAC address at all other border switches, then forward packets according to dst
* MAC address.
*
* @param prefix IP prefix of the route to add
* @param nextHopIpAddress IP address of the next hop
* @param nextHopMacAddress MAC address of the next hop
* @return the generated intent, or null if no intent should be submitted
*/
private MultiPointToSinglePointIntent generateRouteIntent(
IpPrefix prefix, IpAddress nextHopIpAddress, MacAddress nextHopMacAddress) {
// Find the attachment point (egress interface) of the next hop
Interface egressInterface = interfaceService.getMatchingInterface(nextHopIpAddress);
if (egressInterface == null) {
log.warn("No outgoing interface found for {}", nextHopIpAddress);
return null;
}
// Generate the intent itself
Set<ConnectPoint> ingressPorts = new HashSet<>();
ConnectPoint egressPort = egressInterface.connectPoint();
log.debug("Generating intent for prefix {}, next hop mac {}", prefix, nextHopMacAddress);
for (Interface intf : interfaceService.getInterfaces()) {
// TODO this should be only peering interfaces
if (!intf.connectPoint().equals(egressInterface.connectPoint())) {
ConnectPoint srcPort = intf.connectPoint();
ingressPorts.add(srcPort);
}
}
// Match the destination IP prefix at the first hop
TrafficSelector.Builder selector = DefaultTrafficSelector.builder();
if (prefix.isIp4()) {
selector.matchEthType(Ethernet.TYPE_IPV4);
// if it is default route, then we do not need match destination
// IP address
if (prefix.prefixLength() != 0) {
selector.matchIPDst(prefix);
}
} else {
selector.matchEthType(Ethernet.TYPE_IPV6);
// if it is default route, then we do not need match destination
// IP address
if (prefix.prefixLength() != 0) {
selector.matchIPv6Dst(prefix);
}
}
// Rewrite the destination MAC address
TrafficTreatment.Builder treatment =
DefaultTrafficTreatment.builder().setEthDst(nextHopMacAddress);
if (!egressInterface.vlan().equals(VlanId.NONE)) {
treatment.setVlanId(egressInterface.vlan());
// If we set VLAN ID, we have to make sure a VLAN tag exists.
// TODO support no VLAN -> VLAN routing
selector.matchVlanId(VlanId.ANY);
}
int priority = prefix.prefixLength() * PRIORITY_MULTIPLIER + PRIORITY_OFFSET;
Key key = Key.of(prefix.toString(), appId);
return MultiPointToSinglePointIntent.builder()
.appId(appId)
.key(key)
.selector(selector.build())
.treatment(treatment.build())
.ingressPoints(ingressPorts)
.egressPoint(egressPort)
.priority(priority)
.constraints(CONSTRAINTS)
.build();
}