*/
package org.opendaylight.protocol.pcep.spi;
+import com.google.common.base.Optional;
+import com.google.common.base.Preconditions;
+import com.google.common.collect.Lists;
+import com.google.common.primitives.UnsignedBytes;
+import io.netty.buffer.ByteBuf;
+import java.util.ArrayList;
import java.util.Arrays;
import java.util.BitSet;
+import java.util.Collections;
import java.util.List;
-
import org.opendaylight.protocol.util.ByteArray;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.iana.rev130816.EnterpriseNumber;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.message.rev131007.PcerrBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Message;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Object;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.error.type.request._case.RequestBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.error.type.request._case.request.RpsBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.rp.object.Rp;
-
-import com.google.common.base.Preconditions;
-import com.google.common.collect.Lists;
-import com.google.common.primitives.UnsignedBytes;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.vendor.information.objects.VendorInformationObject;
public abstract class AbstractMessageParser implements MessageParser, MessageSerializer {
- private static final int COMMON_OBJECT_HEADER_LENGTH = 4;
-
- private static final int OC_F_LENGTH = 1;
- private static final int OT_FLAGS_MF_LENGTH = 1;
- private static final int OBJ_LENGTH_F_LENGTH = 2;
-
- private static final int OT_SF_LENGTH = 4;
- private static final int FLAGS_SF_LENGTH = 4;
- /*
- * offsets of fields inside of multi-field in bits
- */
- private static final int OT_SF_OFFSET = 0;
- private static final int FLAGS_SF_OFFSET = OT_SF_OFFSET + OT_SF_LENGTH;
- /*
- * flags offsets inside multi-filed
- */
- private static final int P_FLAG_OFFSET = 6;
- private static final int I_FLAG_OFFSET = 7;
-
- private final ObjectRegistry registry;
-
- protected AbstractMessageParser(final ObjectRegistry registry) {
- this.registry = Preconditions.checkNotNull(registry);
- }
-
- protected byte[] serializeObject(final Object object) {
- if (object == null) {
- return new byte[] {};
- }
- return this.registry.serializeObject(object);
- }
-
- private List<Object> parseObjects(final byte[] bytes) throws PCEPDeserializerException {
- int offset = 0;
- final List<Object> objs = Lists.newArrayList();
- while (bytes.length - offset > 0) {
- if (bytes.length - offset < COMMON_OBJECT_HEADER_LENGTH) {
- throw new PCEPDeserializerException("Too few bytes in passed array. Passed: " + (bytes.length - offset) + " Expected: >= "
- + COMMON_OBJECT_HEADER_LENGTH + ".");
- }
-
- final int objClass = UnsignedBytes.toInt(bytes[offset]);
-
- offset += OC_F_LENGTH;
-
- final int objType = UnsignedBytes.toInt(ByteArray.copyBitsRange(bytes[offset], OT_SF_OFFSET, OT_SF_LENGTH));
-
- final byte[] flagsBytes = { ByteArray.copyBitsRange(bytes[offset], FLAGS_SF_OFFSET, FLAGS_SF_LENGTH) };
-
- final BitSet flags = ByteArray.bytesToBitSet(flagsBytes);
-
- offset += OT_FLAGS_MF_LENGTH;
-
- final int objLength = ByteArray.bytesToInt(ByteArray.subByte(bytes, offset, OBJ_LENGTH_F_LENGTH));
-
- if (bytes.length - offset < objLength - COMMON_OBJECT_HEADER_LENGTH) {
- throw new PCEPDeserializerException("Too few bytes in passed array. Passed: " + (bytes.length - offset) + " Expected: >= "
- + objLength + ".");
- }
-
- offset += OBJ_LENGTH_F_LENGTH;
-
- // copy bytes for deeper parsing
- final byte[] bytesToPass = ByteArray.subByte(bytes, offset, objLength - COMMON_OBJECT_HEADER_LENGTH);
-
- offset += objLength - COMMON_OBJECT_HEADER_LENGTH;
-
- final ObjectHeader header = new ObjectHeaderImpl(flags.get(P_FLAG_OFFSET), flags.get(I_FLAG_OFFSET));
-
- // parseObject is required to return null for P=0 errored objects
- final Object o = this.registry.parseObject(objClass, objType, header, bytesToPass);
- if (o != null) {
- objs.add(o);
- }
- }
-
- return objs;
- }
-
- public static Message createErrorMsg(final PCEPErrors e) {
- final PCEPErrorMapping maping = PCEPErrorMapping.getInstance();
- return new PcerrBuilder().setPcerrMessage(
- new PcerrMessageBuilder().setErrors(
- Arrays.asList(new ErrorsBuilder().setErrorObject(
- new ErrorObjectBuilder().setType(maping.getFromErrorsEnum(e).getType()).setValue(
- maping.getFromErrorsEnum(e).getValue()).build()).build())).build()).build();
- }
-
- public static Message createErrorMsg(final PCEPErrors e, final Rp rp) {
- final PCEPErrorMapping maping = PCEPErrorMapping.getInstance();
- return new PcerrBuilder().setPcerrMessage(
- new PcerrMessageBuilder().setErrorType(
- new RequestCaseBuilder().setRequest(
- new RequestBuilder().setRps(Lists.newArrayList(new RpsBuilder().setRp(rp).build())).build()).build()).setErrors(
- Arrays.asList(new ErrorsBuilder().setErrorObject(
- new ErrorObjectBuilder().setType(maping.getFromErrorsEnum(e).getType()).setValue(
- maping.getFromErrorsEnum(e).getValue()).build()).build())).build()).build();
- }
-
- protected abstract Message validate(final List<Object> objects, final List<Message> errors) throws PCEPDeserializerException;
-
- @Override
- public final Message parseMessage(final byte[] buffer, final List<Message> errors) throws PCEPDeserializerException {
- Preconditions.checkNotNull(buffer, "Buffer may not be null");
-
- // Parse objects first
- final List<Object> objs = parseObjects(buffer);
-
- // Run validation
- return validate(objs, errors);
- }
+ private static final int COMMON_OBJECT_HEADER_LENGTH = 4;
+
+ private static final int OT_SF_LENGTH = 4;
+ private static final int FLAGS_SF_LENGTH = 4;
+ /*
+ * offsets of fields inside of multi-field in bits
+ */
+ private static final int OT_SF_OFFSET = 0;
+ private static final int FLAGS_SF_OFFSET = OT_SF_OFFSET + OT_SF_LENGTH;
+ /*
+ * flags offsets inside multi-filed
+ */
+ private static final int P_FLAG_OFFSET = 6;
+ private static final int I_FLAG_OFFSET = 7;
+
+ private final ObjectRegistry registry;
+ private final VendorInformationObjectRegistry viRegistry;
+
+ protected AbstractMessageParser(final ObjectRegistry registry) {
+ this.registry = Preconditions.checkNotNull(registry);
+ this.viRegistry = null;
+ }
+
+ protected AbstractMessageParser(final ObjectRegistry registry, final VendorInformationObjectRegistry viRegistry) {
+ this.registry = Preconditions.checkNotNull(registry);
+ this.viRegistry = Preconditions.checkNotNull(viRegistry);
+ }
+
+ protected void serializeObject(final Object object, final ByteBuf buffer) {
+ if (object == null) {
+ return;
+ }
+ this.registry.serializeObject(object, buffer);
+ }
+
+ private List<Object> parseObjects(final ByteBuf bytes) throws PCEPDeserializerException {
+ final List<Object> objs = new ArrayList<>();
+ while (bytes.isReadable()) {
+ if (bytes.readableBytes() < COMMON_OBJECT_HEADER_LENGTH) {
+ throw new PCEPDeserializerException("Too few bytes in passed array. Passed: " + bytes.readableBytes() + " Expected: >= "
+ + COMMON_OBJECT_HEADER_LENGTH + ".");
+ }
+ final int objClass = bytes.readUnsignedByte();
+
+ byte flagsByte = bytes.readByte();
+ final int objType = UnsignedBytes.toInt(ByteArray.copyBitsRange(flagsByte, OT_SF_OFFSET, OT_SF_LENGTH));
+ final byte[] flagsBytes = { ByteArray.copyBitsRange(flagsByte, FLAGS_SF_OFFSET, FLAGS_SF_LENGTH) };
+ final BitSet flags = ByteArray.bytesToBitSet(flagsBytes);
+
+ final int objLength = bytes.readUnsignedShort();
+
+ if (bytes.readableBytes() < objLength - COMMON_OBJECT_HEADER_LENGTH) {
+ throw new PCEPDeserializerException("Too few bytes in passed array. Passed: " + bytes.readableBytes() + " Expected: >= "
+ + objLength + ".");
+ }
+ // copy bytes for deeper parsing
+ final ByteBuf bytesToPass = bytes.slice(bytes.readerIndex(), objLength - COMMON_OBJECT_HEADER_LENGTH);
+
+ final ObjectHeader header = new ObjectHeaderImpl(flags.get(P_FLAG_OFFSET), flags.get(I_FLAG_OFFSET));
+
+ if (VendorInformationUtil.isVendorInformationObject(objClass, objType)) {
+ Preconditions.checkState(this.viRegistry != null);
+ final EnterpriseNumber enterpriseNumber = new EnterpriseNumber(bytes.getUnsignedInt(bytes.readerIndex()));
+ final Optional<? extends Object> obj = this.viRegistry.parseVendorInformationObject(enterpriseNumber, header, bytesToPass);
+ if (obj.isPresent()) {
+ objs.add(obj.get());
+ }
+ } else {
+ // parseObject is required to return null for P=0 errored objects
+ final Object o = this.registry.parseObject(objClass, objType, header, bytesToPass);
+ if (o != null) {
+ objs.add(o);
+ }
+ }
+
+ bytes.readerIndex(bytes.readerIndex() + objLength - COMMON_OBJECT_HEADER_LENGTH);
+ }
+
+ return objs;
+ }
+
+ public static Message createErrorMsg(final PCEPErrors e, final Optional<Rp> rp) {
+ final PcerrMessageBuilder msgBuilder = new PcerrMessageBuilder();
+ if (rp.isPresent()) {
+ new RequestCaseBuilder().setRequest(new RequestBuilder().setRps(Collections.singletonList(new RpsBuilder().setRp(
+ rp.get()).build())).build()).build();
+ }
+ return new PcerrBuilder().setPcerrMessage(
+ msgBuilder.setErrors(Arrays.asList(new ErrorsBuilder().setErrorObject(
+ new ErrorObjectBuilder().setType(e.getErrorType()).setValue(
+ e.getErrorValue()).build()).build())).build()).build();
+ }
+
+ protected abstract Message validate(final List<Object> objects, final List<Message> errors) throws PCEPDeserializerException;
+
+ @Override
+ public final Message parseMessage(final ByteBuf buffer, final List<Message> errors) throws PCEPDeserializerException {
+ Preconditions.checkNotNull(buffer, "Buffer may not be null");
+
+ // Parse objects first
+ final List<Object> objs = parseObjects(buffer);
+
+ // Run validation
+ return validate(objs, errors);
+ }
+
+ protected final void serializeVendorInformationObjects(final List<VendorInformationObject> viObjects, final ByteBuf buffer) {
+ if (viObjects != null && !viObjects.isEmpty()) {
+ for (final VendorInformationObject viObject : viObjects) {
+ this.viRegistry.serializeVendorInformationObject(viObject, buffer);
+ }
+ }
+ }
+
+ protected final List<VendorInformationObject> addVendorInformationObjects(final List<Object> objects) {
+ final List<VendorInformationObject> vendorInfo = Lists.newArrayList();
+ while (!objects.isEmpty() && objects.get(0) instanceof VendorInformationObject) {
+ final VendorInformationObject viObject = (VendorInformationObject) objects.get(0);
+ vendorInfo.add(viObject);
+ objects.remove(0);
+ }
+ return vendorInfo;
+ }
}
Code Review / bgpcep.git / blobdiff