private List<Pair<Instruction, Instruction>> vlanOps(
ForwardingObjective fwd, L2ModificationInstruction.L2SubType type) {
List<Pair<Instruction, Instruction>> vlanOps =
findVlanOps(fwd.treatment().allInstructions(), type);
if (vlanOps == null) {
String direction =
type == L2ModificationInstruction.L2SubType.VLAN_POP ? "downstream" : "upstream";
log.error("Missing vlan operations in {} forwarding: {}", direction, fwd);
fail(fwd, ObjectiveError.BADPARAMS);
return null;
}
return vlanOps;
}
private Instruction fetchOutput(ForwardingObjective fwd, String direction) {
Instruction output =
fwd.treatment()
.allInstructions()
.stream()
.filter(i -> i.type() == Instruction.Type.OUTPUT)
.findFirst()
.orElse(null);
if (output == null) {
log.error("OLT {} rule has no output", direction);
fail(fwd, ObjectiveError.BADPARAMS);
return null;
}
return output;
}
@Override
public void forward(ForwardingObjective fwd) {
if (checkForMulticast(fwd)) {
processMulticastRule(fwd);
return;
}
TrafficTreatment treatment = fwd.treatment();
List<Instruction> instructions = treatment.allInstructions();
Optional<Instruction> vlanIntruction =
instructions
.stream()
.filter(i -> i.type() == Instruction.Type.L2MODIFICATION)
.filter(
i ->
((L2ModificationInstruction) i).subtype()
== L2ModificationInstruction.L2SubType.VLAN_PUSH
|| ((L2ModificationInstruction) i).subtype()
== L2ModificationInstruction.L2SubType.VLAN_POP)
.findAny();
if (!vlanIntruction.isPresent()) {
fail(fwd, ObjectiveError.BADPARAMS);
return;
}
L2ModificationInstruction vlanIns = (L2ModificationInstruction) vlanIntruction.get();
if (vlanIns.subtype() == L2ModificationInstruction.L2SubType.VLAN_PUSH) {
installUpstreamRules(fwd);
} else if (vlanIns.subtype() == L2ModificationInstruction.L2SubType.VLAN_POP) {
installDownstreamRules(fwd);
} else {
log.error("Unknown OLT operation: {}", fwd);
fail(fwd, ObjectiveError.UNSUPPORTED);
return;
}
pass(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());
}