1 files changed, 111 insertions, 0 deletions
diff --git a/nat/nat2vpp/src/main/java/io/fd/hc2vpp/nat/write/MappingEntryValidator.java b/nat/nat2vpp/src/main/java/io/fd/hc2vpp/nat/write/MappingEntryValidator.java
new file mode 100644
index 000000000..d0594039d
--- /dev/null
+++ b/nat/nat2vpp/src/main/java/io/fd/hc2vpp/nat/write/MappingEntryValidator.java
@@ -0,0 +1,111 @@
+/*
+ * 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);
+    }
+}