ONOS-2739 - OSPF Basic Packet Structures , which includes encoding and decoding
Change-Id: Ic37fcf98dfb6c7a15a124b495aee8517a8df23c9
diff --git a/protocols/ospf/protocol/src/main/java/org/onosproject/ospf/protocol/lsa/linksubtype/LinkId.java b/protocols/ospf/protocol/src/main/java/org/onosproject/ospf/protocol/lsa/linksubtype/LinkId.java
new file mode 100644
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--- /dev/null
+++ b/protocols/ospf/protocol/src/main/java/org/onosproject/ospf/protocol/lsa/linksubtype/LinkId.java
@@ -0,0 +1,120 @@
+/*
+ * Copyright 2016 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.ospf.protocol.lsa.linksubtype;
+
+import com.google.common.base.MoreObjects;
+import com.google.common.primitives.Bytes;
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.onosproject.ospf.exceptions.OspfErrorType;
+import org.onosproject.ospf.exceptions.OspfParseException;
+import org.onosproject.ospf.protocol.lsa.TlvHeader;
+import org.onosproject.ospf.protocol.util.OspfUtil;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.net.InetAddress;
+
+/**
+ * Representation of link id value of link tlv of Traffic Engineering.
+ */
+public class LinkId extends TlvHeader implements LinkSubType {
+ private static final Logger log =
+ LoggerFactory.getLogger(LinkId.class);
+ private String linkId;
+
+ /**
+ * Creates an instance of link id.
+ *
+ * @param header tlv header instance
+ */
+ public LinkId(TlvHeader header) {
+ this.setTlvType(header.tlvType());
+ this.setTlvLength(header.tlvLength());
+ }
+
+ /**
+ * Sets link type.
+ *
+ * @param linkType link type value
+ */
+ public void setLinkId(String linkType) {
+ this.linkId = linkType;
+ }
+
+ /**
+ * Reads bytes from channel buffer.
+ *
+ * @param channelBuffer channel buffer instance
+ * @throws Exception might throws exception while parsing packet
+ */
+ public void readFrom(ChannelBuffer channelBuffer) throws Exception {
+ try {
+ byte[] tempByteArray = new byte[OspfUtil.FOUR_BYTES];
+ channelBuffer.readBytes(tempByteArray, 0, OspfUtil.FOUR_BYTES);
+ this.setLinkId(InetAddress.getByAddress(tempByteArray).getHostName());
+ } catch (Exception e) {
+ log.debug("Error::LinkId:: {}", e.getMessage());
+ throw new OspfParseException(OspfErrorType.OSPF_MESSAGE_ERROR,
+ OspfErrorType.BAD_MESSAGE);
+ }
+ }
+
+ /**
+ * Returns instance as byte array.
+ *
+ * @return instance as bytes
+ * @throws Exception might throws exception while parsing packet
+ */
+ public byte[] asBytes() throws Exception {
+ byte[] linkSubType = null;
+
+ byte[] linkSubTlvHeader = getTlvHeaderAsByteArray();
+ byte[] linkSubTlvBody = getLinkSubTypeTlvBodyAsByteArray();
+ linkSubType = Bytes.concat(linkSubTlvHeader, linkSubTlvBody);
+
+ return linkSubType;
+ }
+
+ /**
+ * Gets byte array of link id sub tlv body.
+ *
+ * @return gets the body as byte array
+ * @throws Exception might throws exception while parsing packet
+ */
+ public byte[] getLinkSubTypeTlvBodyAsByteArray() throws Exception {
+ byte[] linkSubTypeBody = null;
+ try {
+ linkSubTypeBody = InetAddress.getByName(this.linkId).getAddress();
+ } catch (Exception e) {
+ log.debug("Error::LinkId:: {}", e.getMessage());
+ throw new OspfParseException(OspfErrorType.OSPF_MESSAGE_ERROR,
+ OspfErrorType.BAD_MESSAGE);
+ }
+ return linkSubTypeBody;
+ }
+
+ /**
+ * Returns this instance as string.
+ *
+ * @return this instance as string
+ */
+ @Override
+ public String toString() {
+ return MoreObjects.toStringHelper(getClass())
+ .add("linkId", linkId)
+ .toString();
+ }
+}
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