use of org.onosproject.net.pi.runtime.PiOptionalFieldMatch in project onos by opennetworkinglab.
the class PiFlowRuleTranslatorImpl method typeCheckFieldMatch.
private static PiFieldMatch typeCheckFieldMatch(PiFieldMatch fieldMatch, PiMatchFieldModel fieldModel) throws PiTranslationException {
// Check parameter type and size
if (!fieldModel.matchType().equals(fieldMatch.type())) {
throw new PiTranslationException(format("Wrong match type for field '%s', expected %s, but found %s", fieldMatch.fieldId(), fieldModel.matchType().name(), fieldMatch.type().name()));
}
// Check if the arbitrary bit width is supported
if (!fieldModel.hasBitWidth() && !fieldModel.matchType().equals(PiMatchType.EXACT) && !fieldModel.matchType().equals(PiMatchType.OPTIONAL)) {
throw new PiTranslationException(format("Arbitrary bit width for field '%s' and match type %s is not supported", fieldMatch.fieldId(), fieldModel.matchType().name()));
}
int modelBitWidth = fieldModel.bitWidth();
try {
switch(fieldModel.matchType()) {
case EXACT:
PiExactFieldMatch exactField = (PiExactFieldMatch) fieldMatch;
return new PiExactFieldMatch(fieldMatch.fieldId(), fieldModel.hasBitWidth() ? exactField.value().fit(modelBitWidth) : exactField.value());
case TERNARY:
PiTernaryFieldMatch ternField = (PiTernaryFieldMatch) fieldMatch;
ImmutableByteSequence ternMask = ternField.mask().fit(modelBitWidth);
ImmutableByteSequence ternValue = ternField.value().fit(modelBitWidth).bitwiseAnd(ternMask);
return new PiTernaryFieldMatch(fieldMatch.fieldId(), ternValue, ternMask);
case LPM:
PiLpmFieldMatch lpmfield = (PiLpmFieldMatch) fieldMatch;
if (lpmfield.prefixLength() > modelBitWidth) {
throw new PiTranslationException(format("Invalid prefix length for LPM field '%s', found %d but field has bit-width %d", fieldMatch.fieldId(), lpmfield.prefixLength(), modelBitWidth));
}
ImmutableByteSequence lpmValue = lpmfield.value().fit(modelBitWidth);
ImmutableByteSequence lpmMask = prefixOnes(lpmValue.size(), lpmfield.prefixLength());
lpmValue = lpmValue.bitwiseAnd(lpmMask);
return new PiLpmFieldMatch(fieldMatch.fieldId(), lpmValue, lpmfield.prefixLength());
case RANGE:
return new PiRangeFieldMatch(fieldMatch.fieldId(), ((PiRangeFieldMatch) fieldMatch).lowValue().fit(modelBitWidth), ((PiRangeFieldMatch) fieldMatch).highValue().fit(modelBitWidth));
case OPTIONAL:
PiOptionalFieldMatch optionalField = (PiOptionalFieldMatch) fieldMatch;
return new PiOptionalFieldMatch(fieldMatch.fieldId(), fieldModel.hasBitWidth() ? optionalField.value().fit(modelBitWidth) : optionalField.value());
default:
// Should never be here.
throw new IllegalArgumentException("Unrecognized match type " + fieldModel.matchType().name());
}
} catch (ByteSequenceTrimException e) {
throw new PiTranslationException(format("Size mismatch for field %s: %s", fieldMatch.fieldId(), e.getMessage()));
}
}
Aggregations