[Emu][onos-2603] - Implement LinkState attribute of Node flag bit
Change-Id: I31ee200992a1a1c6b95ba7b680f671f8ecc50b4d
diff --git a/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/attr/BgpAttrNodeFlagBitTlv.java b/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/attr/BgpAttrNodeFlagBitTlv.java
new file mode 100755
index 0000000..ba02f6d
--- /dev/null
+++ b/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/attr/BgpAttrNodeFlagBitTlv.java
@@ -0,0 +1,177 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * 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 org.onosproject.bgpio.types.attr;
+
+import java.util.Objects;
+
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.onosproject.bgpio.exceptions.BGPParseException;
+import org.onosproject.bgpio.types.BGPErrorType;
+import org.onosproject.bgpio.types.BGPValueType;
+import org.onosproject.bgpio.util.Validation;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.google.common.base.MoreObjects;
+
+/**
+ * Implements BGP attribute node flag.
+ */
+public class BgpAttrNodeFlagBitTlv implements BGPValueType {
+
+ protected static final Logger log = LoggerFactory
+ .getLogger(BgpAttrNodeFlagBitTlv.class);
+
+ public static final int ATTRNODE_FLAGBIT = 1024;
+
+ /* Node flag bit TLV */
+ private boolean bOverloadBit;
+ private boolean bAttachedBit;
+ private boolean bExternalBit;
+ private boolean bABRBit;
+
+ public static final int BIT_SET = 1;
+ public static final int FIRST_BIT = 0x80;
+ public static final int SECOND_BIT = 0x40;
+ public static final int THIRD_BIT = 0x20;
+ public static final int FOURTH_BIT = 0x01;
+
+ /**
+ * Constructor to initialize parameters.
+ *
+ * @param bOverloadBit Overload bit
+ * @param bAttachedBit Attached bit
+ * @param bExternalBit External bit
+ * @param bABRBit ABR Bit
+ */
+ BgpAttrNodeFlagBitTlv(boolean bOverloadBit, boolean bAttachedBit,
+ boolean bExternalBit, boolean bABRBit) {
+ this.bOverloadBit = bOverloadBit;
+ this.bAttachedBit = bAttachedBit;
+ this.bExternalBit = bExternalBit;
+ this.bABRBit = bABRBit;
+ }
+
+ /**
+ * Reads the Node Flag Bits.
+ *
+ * @param cb ChannelBuffer
+ * @return attribute node flag bit tlv
+ * @throws BGPParseException while parsing BgpAttrNodeFlagBitTlv
+ */
+ public static BgpAttrNodeFlagBitTlv read(ChannelBuffer cb)
+ throws BGPParseException {
+ boolean bOverloadBit = false;
+ boolean bAttachedBit = false;
+ boolean bExternalBit = false;
+ boolean bABRBit = false;
+
+ short lsAttrLength = cb.readShort();
+
+ if (lsAttrLength != 1) {
+ Validation.validateLen(BGPErrorType.UPDATE_MESSAGE_ERROR,
+ BGPErrorType.ATTRIBUTE_LENGTH_ERROR,
+ lsAttrLength);
+ }
+
+ byte nodeFlagBits = cb.readByte();
+
+ bOverloadBit = ((nodeFlagBits & (byte) FIRST_BIT) == FIRST_BIT);
+ bAttachedBit = ((nodeFlagBits & (byte) SECOND_BIT) == SECOND_BIT);
+ bExternalBit = ((nodeFlagBits & (byte) THIRD_BIT) == THIRD_BIT);
+ bABRBit = ((nodeFlagBits & (byte) FOURTH_BIT) == FOURTH_BIT);
+
+ return new BgpAttrNodeFlagBitTlv(bOverloadBit, bAttachedBit,
+ bExternalBit, bABRBit);
+ }
+
+ /**
+ * Returns Overload Bit.
+ *
+ * @return Overload Bit
+ */
+ boolean getOverLoadBit() {
+ return bOverloadBit;
+ }
+
+ /**
+ * Returns Attached Bit.
+ *
+ * @return Attached Bit
+ */
+ boolean getAttachedBit() {
+ return bAttachedBit;
+ }
+
+ /**
+ * Returns External Bit.
+ *
+ * @return External Bit
+ */
+ boolean getExternalBit() {
+ return bExternalBit;
+ }
+
+ /**
+ * Returns ABR Bit.
+ *
+ * @return ABR Bit
+ */
+ boolean getABRBit() {
+ return bABRBit;
+ }
+
+ @Override
+ public short getType() {
+ return ATTRNODE_FLAGBIT;
+ }
+
+ @Override
+ public int write(ChannelBuffer cb) {
+ // TODO will be implementing it later
+ return 0;
+ }
+
+ @Override
+ public int hashCode() {
+ return Objects.hash(bOverloadBit, bAttachedBit, bExternalBit, bABRBit);
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (this == obj) {
+ return true;
+ }
+
+ if (obj instanceof BgpAttrNodeFlagBitTlv) {
+ BgpAttrNodeFlagBitTlv other = (BgpAttrNodeFlagBitTlv) obj;
+ return Objects.equals(bOverloadBit, other.bOverloadBit)
+ && Objects.equals(bAttachedBit, other.bAttachedBit)
+ && Objects.equals(bExternalBit, other.bExternalBit)
+ && Objects.equals(bABRBit, other.bABRBit);
+ }
+ return false;
+ }
+
+ @Override
+ public String toString() {
+ return MoreObjects.toStringHelper(getClass())
+ .add("bOverloadBit", bOverloadBit)
+ .add("bAttachedBit", bAttachedBit)
+ .add("bExternalBit", bExternalBit).add("bABRBit", bABRBit)
+ .toString();
+ }
+}