private void installDownstreamRules(ForwardingObjective fwd) {
List<Pair<Instruction, Instruction>> vlanOps =
vlanOps(fwd, L2ModificationInstruction.L2SubType.VLAN_POP);
if (vlanOps == null) {
return;
}
Instruction output = fetchOutput(fwd, "downstream");
if (output == null) {
return;
}
Pair<Instruction, Instruction> popAndRewrite = vlanOps.remove(0);
TrafficSelector selector = fwd.selector();
Criterion outerVlan = selector.getCriterion(Criterion.Type.VLAN_VID);
Criterion innerVlan = selector.getCriterion(Criterion.Type.INNER_VLAN_VID);
Criterion inport = selector.getCriterion(Criterion.Type.IN_PORT);
if (outerVlan == null || innerVlan == null || inport == null) {
log.error("Forwarding objective is underspecified: {}", fwd);
fail(fwd, ObjectiveError.BADPARAMS);
return;
}
Criterion innerVid = Criteria.matchVlanId(((VlanIdCriterion) innerVlan).vlanId());
FlowRule.Builder outer =
DefaultFlowRule.builder()
.forDevice(deviceId)
.fromApp(appId)
.makePermanent()
.withPriority(fwd.priority())
.withSelector(buildSelector(inport, outerVlan))
.withTreatment(
buildTreatment(popAndRewrite.getLeft(), Instructions.transition(QQ_TABLE)));
FlowRule.Builder inner =
DefaultFlowRule.builder()
.forDevice(deviceId)
.fromApp(appId)
.forTable(QQ_TABLE)
.makePermanent()
.withPriority(fwd.priority())
.withSelector(buildSelector(inport, innerVid))
.withTreatment(buildTreatment(popAndRewrite.getLeft(), output));
applyRules(fwd, inner, outer);
}
private void buildAndApplyRule(
FilteringObjective filter, TrafficSelector selector, TrafficTreatment treatment) {
FlowRule rule =
DefaultFlowRule.builder()
.forDevice(deviceId)
.forTable(0)
.fromApp(filter.appId())
.makePermanent()
.withSelector(selector)
.withTreatment(treatment)
.withPriority(filter.priority())
.build();
FlowRuleOperations.Builder opsBuilder = FlowRuleOperations.builder();
switch (filter.type()) {
case PERMIT:
opsBuilder.add(rule);
break;
case DENY:
opsBuilder.remove(rule);
break;
default:
log.warn("Unknown filter type : {}", filter.type());
fail(filter, ObjectiveError.UNSUPPORTED);
}
applyFlowRules(opsBuilder, filter);
}
private void installUpstreamRules(ForwardingObjective fwd) {
List<Pair<Instruction, Instruction>> vlanOps =
vlanOps(fwd, L2ModificationInstruction.L2SubType.VLAN_PUSH);
if (vlanOps == null) {
return;
}
Instruction output = fetchOutput(fwd, "upstream");
if (output == null) {
return;
}
Pair<Instruction, Instruction> innerPair = vlanOps.remove(0);
Pair<Instruction, Instruction> outerPair = vlanOps.remove(0);
FlowRule.Builder inner =
DefaultFlowRule.builder()
.forDevice(deviceId)
.fromApp(appId)
.makePermanent()
.withPriority(fwd.priority())
.withSelector(fwd.selector())
.withTreatment(buildTreatment(innerPair.getRight(), Instructions.transition(QQ_TABLE)));
PortCriterion inPort = (PortCriterion) fwd.selector().getCriterion(Criterion.Type.IN_PORT);
VlanId cVlanId =
((L2ModificationInstruction.ModVlanIdInstruction) innerPair.getRight()).vlanId();
FlowRule.Builder outer =
DefaultFlowRule.builder()
.forDevice(deviceId)
.fromApp(appId)
.forTable(QQ_TABLE)
.makePermanent()
.withPriority(fwd.priority())
.withSelector(buildSelector(inPort, Criteria.matchVlanId(cVlanId)))
.withTreatment(buildTreatment(outerPair.getLeft(), outerPair.getRight(), output));
applyRules(fwd, inner, outer);
}
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;
}
/**
* Ensures packet is of required type. Obtain the PortNumber associated with the inPackets
* DeviceId. If this port has previously been learned (in initMacTable method) build a flow
* using the packet's out port, treatment, destination, and other properties. Send the flow to
* the learned out port. Otherwise, flood packet to all ports if out port is not learned.
*
* @param pc the PacketContext object passed through from activate() method
*/
public void actLikeSwitch(PacketContext pc) {
/*
* Ensures the type of packet being processed is only of type IPV4 (not LLDP or BDDP). If it is not, return
* and do nothing with the packet. actLikeSwitch can only process IPV4 packets.
*/
Short type = pc.inPacket().parsed().getEtherType();
if (type != Ethernet.TYPE_IPV4) {
return;
}
/*
* Learn the destination, source, and output port of the packet using a ConnectPoint and the
* associated macTable. If there is a known port associated with the packet's destination MAC Address,
* the output port will not be null.
*/
ConnectPoint cp = pc.inPacket().receivedFrom();
Map<MacAddress, PortNumber> macTable = macTables.get(cp.deviceId());
MacAddress srcMac = pc.inPacket().parsed().getSourceMAC();
MacAddress dstMac = pc.inPacket().parsed().getDestinationMAC();
macTable.put(srcMac, cp.port());
PortNumber outPort = macTable.get(dstMac);
/*
* If port is known, set pc's out port to the packet's learned output port and construct a
* FlowRule using a source, destination, treatment and other properties. Send the FlowRule
* to the designated output port.
*/
if (outPort != null) {
pc.treatmentBuilder().setOutput(outPort);
FlowRule fr =
DefaultFlowRule.builder()
.withSelector(DefaultTrafficSelector.builder().matchEthDst(dstMac).build())
.withTreatment(DefaultTrafficTreatment.builder().setOutput(outPort).build())
.forDevice(cp.deviceId())
.withPriority(PacketPriority.REACTIVE.priorityValue())
.makeTemporary(60)
.fromApp(appId)
.build();
flowRuleService.applyFlowRules(fr);
pc.send();
} else {
/*
* else, the output port has not been learned yet. Flood the packet to all ports using
* the actLikeHub method
*/
actLikeHub(pc);
}
}
private void processMulticastRule(ForwardingObjective fwd) {
if (fwd.nextId() == null) {
log.error("Multicast objective does not have a next id");
fail(fwd, ObjectiveError.BADPARAMS);
}
OLTPipelineGroup next = getGroupForNextObjective(fwd.nextId());
if (next == null) {
log.error("Group for forwarding objective missing: {}", fwd);
fail(fwd, ObjectiveError.GROUPMISSING);
}
Group group = groupService.getGroup(deviceId, next.key());
TrafficTreatment treatment = buildTreatment(Instructions.createGroup(group.id()));
FlowRule rule =
DefaultFlowRule.builder()
.forDevice(deviceId)
.forTable(0)
.fromApp(fwd.appId())
.makePermanent()
.withPriority(fwd.priority())
.withSelector(fwd.selector())
.withTreatment(treatment)
.build();
FlowRuleOperations.Builder builder = FlowRuleOperations.builder();
switch (fwd.op()) {
case ADD:
builder.add(rule);
break;
case REMOVE:
builder.remove(rule);
break;
case ADD_TO_EXISTING:
case REMOVE_FROM_EXISTING:
break;
default:
log.warn("Unknown forwarding operation: {}", fwd.op());
}
applyFlowRules(builder, fwd);
}
@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());
}