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/*
* Copyright (c) 2018 Cisco and/or its affiliates.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.fd.hc2vpp.nat.write;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkState;
import com.google.common.annotations.VisibleForTesting;
import io.fd.hc2vpp.common.translate.util.Ipv4Translator;
import io.fd.hc2vpp.common.translate.util.Ipv6Translator;
import io.fd.honeycomb.translate.write.DataValidationFailedException.CreateValidationFailedException;
import io.fd.honeycomb.translate.write.Validator;
import io.fd.honeycomb.translate.write.WriteContext;
import javax.annotation.Nonnull;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpPrefix;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Prefix;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv6Prefix;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.nat.rev180628.PortNumber;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.nat.rev180628.nat.instances.instance.mapping.table.MappingEntry;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
final class MappingEntryValidator implements Validator<MappingEntry>, Ipv4Translator, Ipv6Translator {
@Override
public void validateWrite(@Nonnull final InstanceIdentifier<MappingEntry> id,
@Nonnull final MappingEntry mappingEntry,
@Nonnull final WriteContext writeContext)
throws CreateValidationFailedException {
try {
validateMappingEntry(id, mappingEntry);
} catch (RuntimeException e) {
throw new CreateValidationFailedException(id, mappingEntry, e);
}
}
private void validateMappingEntry(final InstanceIdentifier<MappingEntry> id, final MappingEntry mappingEntry) {
validateMappingEntryType(mappingEntry);
validateInternalSrcAddress(mappingEntry);
validateExternalSrcAddress(mappingEntry);
validateTransportProtocol(mappingEntry);
validatePortNumber(id, mappingEntry.getInternalSrcPort());
validatePortNumber(id, mappingEntry.getExternalSrcPort());
}
@VisibleForTesting
void validateMappingEntryType(final MappingEntry mappingEntry) {
// Only static mapping are currently supported
checkArgument(mappingEntry.getType()
== org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.nat.rev180628.MappingEntry.Type.Static,
"Only static NAT entries are supported currently. Trying to write: %s entry", mappingEntry.getType());
}
@VisibleForTesting
void validateInternalSrcAddress(final MappingEntry mappingEntry) {
final IpPrefix internalSrcPrefix = mappingEntry.getInternalSrcAddress();
final Ipv4Prefix internalV4SrcPrefix = internalSrcPrefix.getIpv4Prefix();
final Ipv6Prefix internalV6SrcPrefix = internalSrcPrefix.getIpv6Prefix();
if (internalV4SrcPrefix != null) {
checkArgument(extractPrefix(internalV4SrcPrefix) == 32,
"Only /32 prefix in internal-src-address is supported, but was %s", internalV4SrcPrefix);
} else {
checkState(internalV6SrcPrefix != null,
"internalSrcPrefix.getIpv6Prefix() should not return null if Ipv4 prefix is not given");
checkArgument(extractPrefix(internalV6SrcPrefix) == (byte) 128,
"Only /128 prefix in internal-src-address is supported, but was %s", internalV6SrcPrefix);
}
}
@VisibleForTesting
void validateExternalSrcAddress(final MappingEntry mappingEntry) {
final IpPrefix externalSrcAddress = mappingEntry.getExternalSrcAddress();
checkArgument(externalSrcAddress != null, "The external-src-address leaf is missing");
final Ipv4Prefix ipv4Prefix = externalSrcAddress.getIpv4Prefix();
checkArgument(ipv4Prefix != null, "No Ipv4 present in external-src-address %s", externalSrcAddress);
checkArgument(extractPrefix(ipv4Prefix) == 32,
"Only /32 prefix in external-src-address is supported, but was %s", ipv4Prefix);
}
@VisibleForTesting
static void validateTransportProtocol(final MappingEntry mappingEntry) {
final Short protocol = mappingEntry.getTransportProtocol();
if (protocol == null) {
return;
}
checkArgument(protocol == 1 || protocol == 6 || protocol == 17 || protocol == 58,
"Unsupported protocol %s only ICMP(1), IPv6-ICMP(58), TCP(6) and UDP(17) are currently supported",
protocol);
}
@VisibleForTesting
static void validatePortNumber(final InstanceIdentifier<MappingEntry> id, final PortNumber portNumber) {
if (portNumber == null) {
return;
}
checkArgument(portNumber.getStartPortNumber() != null && portNumber.getEndPortNumber() == null,
"Only single port number supported. Submitted: %s for entry: %s", portNumber, id);
}
}
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