private OFAction buildL3Modification(Instruction i) {
L3ModificationInstruction l3m = (L3ModificationInstruction) i;
ModIPInstruction ip;
Ip4Address ip4;
Ip6Address ip6;
OFOxm<?> oxm = null;
switch (l3m.subtype()) {
case IPV4_SRC:
ip = (ModIPInstruction) i;
ip4 = ip.ip().getIp4Address();
oxm = factory().oxms().ipv4Src(IPv4Address.of(ip4.toInt()));
break;
case IPV4_DST:
ip = (ModIPInstruction) i;
ip4 = ip.ip().getIp4Address();
oxm = factory().oxms().ipv4Dst(IPv4Address.of(ip4.toInt()));
break;
case IPV6_SRC:
ip = (ModIPInstruction) i;
ip6 = ip.ip().getIp6Address();
oxm = factory().oxms().ipv6Src(IPv6Address.of(ip6.toOctets()));
break;
case IPV6_DST:
ip = (ModIPInstruction) i;
ip6 = ip.ip().getIp6Address();
oxm = factory().oxms().ipv6Dst(IPv6Address.of(ip6.toOctets()));
break;
case IPV6_FLABEL:
ModIPv6FlowLabelInstruction flowLabelInstruction = (ModIPv6FlowLabelInstruction) i;
int flowLabel = flowLabelInstruction.flowLabel();
oxm = factory().oxms().ipv6Flabel(IPv6FlowLabel.of(flowLabel));
break;
case DEC_TTL:
return factory().actions().decNwTtl();
case TTL_IN:
return factory().actions().copyTtlIn();
case TTL_OUT:
return factory().actions().copyTtlOut();
default:
log.warn("Unimplemented action type {}.", l3m.subtype());
break;
}
if (oxm != null) {
return factory().actions().buildSetField().setField(oxm).build();
}
return null;
}
/**
* Matches the contents of a mod IPv6 Flow 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 matchModIPv6FlowLabelInstruction(
JsonNode instructionJson, Description description) {
ModIPv6FlowLabelInstruction instructionToMatch = (ModIPv6FlowLabelInstruction) 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 jsonFlowLabel = instructionJson.get("flowLabel").intValue();
final int flowLabel = instructionToMatch.flowLabel();
if (flowLabel != jsonFlowLabel) {
description.appendText("IPv6 flow label was " + jsonFlowLabel);
return false;
}
return true;
}