private OFAction buildL2Modification(Instruction i) {
L2ModificationInstruction l2m = (L2ModificationInstruction) i;
ModEtherInstruction eth;
OFOxm<?> oxm = null;
switch (l2m.subtype()) {
case ETH_DST:
eth = (ModEtherInstruction) l2m;
oxm = factory().oxms().ethDst(MacAddress.of(eth.mac().toLong()));
break;
case ETH_SRC:
eth = (ModEtherInstruction) l2m;
oxm = factory().oxms().ethSrc(MacAddress.of(eth.mac().toLong()));
break;
case VLAN_ID:
ModVlanIdInstruction vlanId = (ModVlanIdInstruction) l2m;
oxm = factory().oxms().vlanVid(OFVlanVidMatch.ofVlan(vlanId.vlanId().toShort()));
break;
case VLAN_PCP:
ModVlanPcpInstruction vlanPcp = (ModVlanPcpInstruction) l2m;
oxm = factory().oxms().vlanPcp(VlanPcp.of(vlanPcp.vlanPcp()));
break;
case MPLS_PUSH:
PushHeaderInstructions pushHeaderInstructions = (PushHeaderInstructions) l2m;
return factory()
.actions()
.pushMpls(EthType.of(pushHeaderInstructions.ethernetType().toShort()));
case MPLS_POP:
PushHeaderInstructions popHeaderInstructions = (PushHeaderInstructions) l2m;
return factory()
.actions()
.popMpls(EthType.of(popHeaderInstructions.ethernetType().toShort()));
case MPLS_LABEL:
ModMplsLabelInstruction mplsLabel = (ModMplsLabelInstruction) l2m;
oxm = factory().oxms().mplsLabel(U32.of(mplsLabel.label().longValue()));
break;
case DEC_MPLS_TTL:
return factory().actions().decMplsTtl();
case VLAN_POP:
return factory().actions().popVlan();
case VLAN_PUSH:
PushHeaderInstructions pushVlanInstruction = (PushHeaderInstructions) l2m;
return factory()
.actions()
.pushVlan(EthType.of(pushVlanInstruction.ethernetType().toShort()));
default:
log.warn("Unimplemented action type {}.", l2m.subtype());
break;
}
if (oxm != null) {
return factory().actions().buildSetField().setField(oxm).build();
}
return null;
}
/**
* Matches the contents of a mod MPLS label instruction.
*
* @param instructionJson JSON instruction to match
* @param description Description object used for recording errors
* @return true if contents match, false otherwise
*/
private boolean matchModMplsLabelInstruction(JsonNode instructionJson, Description description) {
ModMplsLabelInstruction instructionToMatch = (ModMplsLabelInstruction) instruction;
final String jsonSubtype = instructionJson.get("subtype").textValue();
if (!instructionToMatch.subtype().name().equals(jsonSubtype)) {
description.appendText("subtype was " + jsonSubtype);
return false;
}
final String jsonType = instructionJson.get("type").textValue();
if (!instructionToMatch.type().name().equals(jsonType)) {
description.appendText("type was " + jsonType);
return false;
}
final int jsonLabel = instructionJson.get("label").intValue();
final int label = instructionToMatch.label().toInt();
if (label != jsonLabel) {
description.appendText("MPLS label was " + jsonLabel);
return false;
}
return true;
}