[onos-2603] - Implements Max link bandwidth
Change-Id: I3861931b62b60518962c528b3f47a464cf08c314
diff --git a/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/attr/BgpLinkAttrMaxLinkBandwidth.java b/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/attr/BgpLinkAttrMaxLinkBandwidth.java
new file mode 100644
index 0000000..a1f0198
--- /dev/null
+++ b/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/attr/BgpLinkAttrMaxLinkBandwidth.java
@@ -0,0 +1,150 @@
+/*
+ * 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 Max Link bandwidth.
+ */
+public final class BgpLinkAttrMaxLinkBandwidth implements BGPValueType {
+
+ protected static final Logger log = LoggerFactory
+ .getLogger(BgpLinkAttrMaxLinkBandwidth.class);
+
+ public static final int MAX_BANDWIDTH_LEN = 4;
+ public static final int NO_OF_BITS = 8;
+
+ public short type;
+
+ /* ISIS administrative group */
+ private final float maxBandwidth;
+
+ /**
+ * Constructor to initialize the values.
+ *
+ * @param maxBandwidth Maximum link bandwidth.
+ * @param type TLV type
+ */
+ private BgpLinkAttrMaxLinkBandwidth(float maxBandwidth, short type) {
+ this.maxBandwidth = maxBandwidth;
+ this.type = type;
+ }
+
+ /**
+ * Returns object of this class with specified values.
+ *
+ * @param maxBandwidth Maximum link bandwidth.
+ * @param type TLV type
+ * @return object of BgpLinkAttrMaxLinkBandwidth
+ */
+ public static BgpLinkAttrMaxLinkBandwidth of(final float maxBandwidth,
+ final short type) {
+ return new BgpLinkAttrMaxLinkBandwidth(maxBandwidth, type);
+ }
+
+ /**
+ * Reads the BGP link attributes of Maximum link bandwidth.
+ *
+ * @param cb Channel buffer
+ * @param type type of this tlv
+ * @return object of type BgpLinkAttrMaxLinkBandwidth
+ * @throws BGPParseException while parsing BgpLinkAttrMaxLinkBandwidth
+ */
+ public static BgpLinkAttrMaxLinkBandwidth read(ChannelBuffer cb, short type)
+ throws BGPParseException {
+ float maxBandwidth;
+ short lsAttrLength = cb.readShort();
+
+ if ((lsAttrLength != MAX_BANDWIDTH_LEN)
+ || (cb.readableBytes() < lsAttrLength)) {
+ Validation.validateLen(BGPErrorType.UPDATE_MESSAGE_ERROR,
+ BGPErrorType.ATTRIBUTE_LENGTH_ERROR,
+ lsAttrLength);
+ }
+
+ maxBandwidth = ieeeToFloatRead(cb.readInt()) * NO_OF_BITS;
+
+ return BgpLinkAttrMaxLinkBandwidth.of(maxBandwidth, type);
+ }
+
+ /**
+ * Returns Maximum link bandwidth.
+ *
+ * @return Maximum link bandwidth
+ */
+ float linkAttrMaxLinkBandwidth() {
+ return maxBandwidth;
+ }
+
+ /**
+ * 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.type;
+ }
+
+ @Override
+ public int hashCode() {
+ return Objects.hash(maxBandwidth);
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (this == obj) {
+ return true;
+ }
+
+ if (obj instanceof BgpLinkAttrMaxLinkBandwidth) {
+ BgpLinkAttrMaxLinkBandwidth other = (BgpLinkAttrMaxLinkBandwidth) obj;
+ return Objects.equals(maxBandwidth, other.maxBandwidth);
+ }
+ 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())
+ .add("maxBandwidth", maxBandwidth).toString();
+ }
+}
diff --git a/bgp/bgpio/src/test/java/org/onosproject/bgp/BgpLinkAttrMaxLinkBandwidthTest.java b/bgp/bgpio/src/test/java/org/onosproject/bgp/BgpLinkAttrMaxLinkBandwidthTest.java
new file mode 100644
index 0000000..d4c3b61
--- /dev/null
+++ b/bgp/bgpio/src/test/java/org/onosproject/bgp/BgpLinkAttrMaxLinkBandwidthTest.java
@@ -0,0 +1,44 @@
+/*
+ * 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.bgp;
+
+import org.junit.Test;
+import org.onosproject.bgpio.types.attr.BgpLinkAttrMaxLinkBandwidth;
+
+import com.google.common.testing.EqualsTester;
+
+/**
+ * Test for BGP link max bandwidth attribute.
+ */
+public class BgpLinkAttrMaxLinkBandwidthTest {
+ private final float val = 0x010203;
+ private final short valLen = 3;
+ private final float val1 = 0x01020304;
+ private final short val1Len = 4;
+
+ private final BgpLinkAttrMaxLinkBandwidth data = BgpLinkAttrMaxLinkBandwidth
+ .of(val, valLen);
+ private final BgpLinkAttrMaxLinkBandwidth sameAsData = BgpLinkAttrMaxLinkBandwidth
+ .of(val, valLen);
+ private final BgpLinkAttrMaxLinkBandwidth diffData = BgpLinkAttrMaxLinkBandwidth
+ .of(val1, val1Len);
+
+ @Test
+ public void basics() {
+ new EqualsTester().addEqualityGroup(data, sameAsData)
+ .addEqualityGroup(diffData).testEquals();
+ }
+}
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