[Emu][onos-2603] - Implement LinkState Link attributes
Change-Id: I452675ab9e3cf884924212b7114659dfc9118ef3
diff --git a/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/attr/BgpLinkAttrUnRsrvdLinkBandwidth.java b/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/attr/BgpLinkAttrUnRsrvdLinkBandwidth.java
new file mode 100644
index 0000000..3e7833c
--- /dev/null
+++ b/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/attr/BgpLinkAttrUnRsrvdLinkBandwidth.java
@@ -0,0 +1,144 @@
+/*
+ * 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.Arrays;
+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 unreserved bandwidth attribute.
+ */
+public class BgpLinkAttrUnRsrvdLinkBandwidth implements BGPValueType {
+
+ protected static final Logger log = LoggerFactory
+ .getLogger(BgpLinkAttrUnRsrvdLinkBandwidth.class);
+
+ public static final int MAX_BANDWIDTH_LEN = 4;
+ public static final int NO_OF_BITS = 8;
+ public static final int NO_OF_PRIORITY = 8;
+
+ public short sType;
+
+ /* ISIS administrative group */
+ private float[] maxUnResBandwidth;
+
+ /**
+ * Constructor to initialize the values.
+ *
+ * @param maxUnResBandwidth Maximum Unreserved bandwidth
+ * @param sType returns the tag value
+ */
+ BgpLinkAttrUnRsrvdLinkBandwidth(float[] maxUnResBandwidth, short sType) {
+ this.maxUnResBandwidth = Arrays.copyOf(maxUnResBandwidth,
+ maxUnResBandwidth.length);
+ this.sType = sType;
+ }
+
+ /**
+ * Reads the BGP link attributes of Maximum link bandwidth.
+ *
+ * @param cb Channel buffer
+ * @return object of type BgpLinkAttrMaxLinkBandwidth
+ * @throws BGPParseException while parsing BgpLinkAttrMaxLinkBandwidth
+ */
+ public static BgpLinkAttrUnRsrvdLinkBandwidth read(ChannelBuffer cb,
+ short sType)
+ throws BGPParseException {
+ float[] maxUnResBandwidth;
+ short lsAttrLength = cb.readShort();
+
+ if ((lsAttrLength != MAX_BANDWIDTH_LEN * NO_OF_PRIORITY)
+ || (cb.readableBytes() < lsAttrLength)) {
+ Validation.validateLen(BGPErrorType.UPDATE_MESSAGE_ERROR,
+ BGPErrorType.ATTRIBUTE_LENGTH_ERROR,
+ lsAttrLength);
+ }
+
+ maxUnResBandwidth = new float[NO_OF_PRIORITY];
+ for (int i = 0; i < NO_OF_PRIORITY; i++) {
+ maxUnResBandwidth[i] = ieeeToFloatRead(cb.readInt()) * NO_OF_BITS;
+ }
+
+ return new BgpLinkAttrUnRsrvdLinkBandwidth(maxUnResBandwidth, sType);
+ }
+
+ /**
+ * Returns maximum unreserved bandwidth.
+ *
+ * @return unreserved bandwidth.
+ */
+ float[] getLinkAttrUnRsrvdLinkBandwidth() {
+ return maxUnResBandwidth;
+ }
+
+ /**
+ * Parse the IEEE floating point notation and returns it in normal float.
+ *
+ * @param iVal IEEE floating point number
+ * @return normal float
+ */
+ static float ieeeToFloatRead(int iVal) {
+ iVal = (((iVal & 0xFF) << 24) | ((iVal & 0xFF00) << 8)
+ | ((iVal & 0xFF0000) >> 8) | ((iVal >> 24) & 0xFF));
+
+ return Float.intBitsToFloat(iVal);
+ }
+
+ @Override
+ public short getType() {
+ return this.sType;
+ }
+
+ @Override
+ public int hashCode() {
+ return Objects.hash(maxUnResBandwidth);
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (this == obj) {
+ return true;
+ }
+
+ if (obj instanceof BgpLinkAttrUnRsrvdLinkBandwidth) {
+ BgpLinkAttrUnRsrvdLinkBandwidth other = (BgpLinkAttrUnRsrvdLinkBandwidth) obj;
+ return Objects.equals(maxUnResBandwidth, other.maxUnResBandwidth);
+ }
+ return false;
+ }
+
+ @Override
+ public int write(ChannelBuffer cb) {
+ // TODO This will be implemented in the next version
+ return 0;
+ }
+
+ @Override
+ public String toString() {
+ return MoreObjects.toStringHelper(getClass()).omitNullValues()
+ .add("maxUnResBandwidth", maxUnResBandwidth).toString();
+ }
+}