private void lookupByFlowSpace(FVClassifier fvClassifier) {
SliceAction sliceAction;
int perms;
// grab single matching rule: only one because it's a point in flowspace
FlowEntry flowEntry =
fvClassifier
.getSwitchFlowMap()
.matches(
fvClassifier.getSwitchInfo().getDatapathId(),
this.getInPort(),
this.getPacketData());
if (flowEntry == null) {
FVLog.log(
LogLevel.DEBUG, fvClassifier, "dropping unclassifiable msg: " + this.toVerboseString());
return;
}
boolean foundHome = false;
// foreach slice in that rule
for (OFAction ofAction : flowEntry.getActionsList()) {
sliceAction = (SliceAction) ofAction;
perms = sliceAction.getSlicePerms();
if ((perms & (SliceAction.READ | SliceAction.WRITE)) != 0) {
// lookup slice and send msg to them
// TODO record buffer id for later validation
FVSlicer fvSlicer = fvClassifier.getSlicerByName(sliceAction.getSliceName());
if (fvSlicer == null) {
FVLog.log(
LogLevel.WARN,
fvClassifier,
"tried to send msg to non-existant slice: "
+ sliceAction.getSliceName()
+ " corrupted flowspace?:: "
+ this.toVerboseString());
continue;
}
if (fvSlicer.isConnected()) {
if ((perms & SliceAction.WRITE) != 0) fvSlicer.setBufferIDAllowed(this.getBufferId());
fvSlicer.sendMsg(this, fvClassifier);
/**
* TODO : come back and decide if we should uncomment this i.e., should a rule get
* squashed if it's only recipient is read only
*
* <p>if yes, then tests-readonly.py needs to be changed
*/
// if ((perms & SliceAction.WRITE) != 0)
foundHome = true;
} else {
sendDropRule(fvClassifier, flowEntry, fvSlicer.getSliceName(), (short) 0, (short) 1);
}
foundHome = true;
}
/*
* ash: not sure if this is the intended behavior, but I am guessing
* that if this packet hasn't gotten handled anywhere we should at least
* default to adding a drop rule for unless we want to be flooded.
*/
if (!foundHome) sendDropRule(fvClassifier, flowEntry, "exact", (short) 0, (short) 1);
}
}
