@Override
public void filter(FilteringObjective filter) {
Instructions.OutputInstruction output;
if (filter.meta() != null && !filter.meta().immediate().isEmpty()) {
output =
(Instructions.OutputInstruction)
filter
.meta()
.immediate()
.stream()
.filter(t -> t.type().equals(Instruction.Type.OUTPUT))
.limit(1)
.findFirst()
.get();
if (output == null || !output.port().equals(PortNumber.CONTROLLER)) {
log.error("OLT can only filter packet to controller");
fail(filter, ObjectiveError.UNSUPPORTED);
return;
}
} else {
fail(filter, ObjectiveError.BADPARAMS);
return;
}
if (filter.key().type() != Criterion.Type.IN_PORT) {
fail(filter, ObjectiveError.BADPARAMS);
return;
}
EthTypeCriterion ethType =
(EthTypeCriterion) filterForCriterion(filter.conditions(), Criterion.Type.ETH_TYPE);
if (ethType == null) {
fail(filter, ObjectiveError.BADPARAMS);
return;
}
if (ethType.ethType().equals(EthType.EtherType.EAPOL.ethType())) {
provisionEapol(filter, ethType, output);
} else if (ethType.ethType().equals(EthType.EtherType.IPV4.ethType())) {
IPProtocolCriterion ipProto =
(IPProtocolCriterion) filterForCriterion(filter.conditions(), Criterion.Type.IP_PROTO);
if (ipProto.protocol() == IPv4.PROTOCOL_IGMP) {
provisionIgmp(filter, ethType, ipProto, output);
} else {
log.error("OLT can only filter igmp");
fail(filter, ObjectiveError.UNSUPPORTED);
}
} else {
log.error("OLT can only filter eapol and igmp");
fail(filter, ObjectiveError.UNSUPPORTED);
}
}
@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());
}