Kiran Ramachandra | 959353a | 2016-02-16 22:12:07 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2016 Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.onosproject.ospf.protocol.lsa.linksubtype; |
| 17 | |
| 18 | import com.google.common.base.MoreObjects; |
| 19 | import com.google.common.primitives.Bytes; |
| 20 | import org.jboss.netty.buffer.ChannelBuffer; |
| 21 | import org.onosproject.ospf.exceptions.OspfErrorType; |
| 22 | import org.onosproject.ospf.exceptions.OspfParseException; |
| 23 | import org.onosproject.ospf.protocol.lsa.TlvHeader; |
| 24 | import org.onosproject.ospf.protocol.util.OspfUtil; |
| 25 | import org.slf4j.Logger; |
| 26 | import org.slf4j.LoggerFactory; |
| 27 | |
| 28 | import java.net.InetAddress; |
| 29 | |
| 30 | /** |
| 31 | * Representation of link id value of link tlv of Traffic Engineering. |
| 32 | */ |
| 33 | public class LinkId extends TlvHeader implements LinkSubType { |
| 34 | private static final Logger log = |
| 35 | LoggerFactory.getLogger(LinkId.class); |
| 36 | private String linkId; |
| 37 | |
| 38 | /** |
| 39 | * Creates an instance of link id. |
| 40 | * |
| 41 | * @param header tlv header instance |
| 42 | */ |
| 43 | public LinkId(TlvHeader header) { |
| 44 | this.setTlvType(header.tlvType()); |
| 45 | this.setTlvLength(header.tlvLength()); |
| 46 | } |
| 47 | |
| 48 | /** |
| 49 | * Sets link type. |
| 50 | * |
| 51 | * @param linkType link type value |
| 52 | */ |
| 53 | public void setLinkId(String linkType) { |
| 54 | this.linkId = linkType; |
| 55 | } |
| 56 | |
| 57 | /** |
| 58 | * Reads bytes from channel buffer. |
| 59 | * |
| 60 | * @param channelBuffer channel buffer instance |
| 61 | * @throws Exception might throws exception while parsing packet |
| 62 | */ |
| 63 | public void readFrom(ChannelBuffer channelBuffer) throws Exception { |
| 64 | try { |
| 65 | byte[] tempByteArray = new byte[OspfUtil.FOUR_BYTES]; |
| 66 | channelBuffer.readBytes(tempByteArray, 0, OspfUtil.FOUR_BYTES); |
| 67 | this.setLinkId(InetAddress.getByAddress(tempByteArray).getHostName()); |
| 68 | } catch (Exception e) { |
| 69 | log.debug("Error::LinkId:: {}", e.getMessage()); |
| 70 | throw new OspfParseException(OspfErrorType.OSPF_MESSAGE_ERROR, |
| 71 | OspfErrorType.BAD_MESSAGE); |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | /** |
| 76 | * Returns instance as byte array. |
| 77 | * |
| 78 | * @return instance as bytes |
| 79 | * @throws Exception might throws exception while parsing packet |
| 80 | */ |
| 81 | public byte[] asBytes() throws Exception { |
| 82 | byte[] linkSubType = null; |
| 83 | |
| 84 | byte[] linkSubTlvHeader = getTlvHeaderAsByteArray(); |
| 85 | byte[] linkSubTlvBody = getLinkSubTypeTlvBodyAsByteArray(); |
| 86 | linkSubType = Bytes.concat(linkSubTlvHeader, linkSubTlvBody); |
| 87 | |
| 88 | return linkSubType; |
| 89 | } |
| 90 | |
| 91 | /** |
| 92 | * Gets byte array of link id sub tlv body. |
| 93 | * |
| 94 | * @return gets the body as byte array |
| 95 | * @throws Exception might throws exception while parsing packet |
| 96 | */ |
| 97 | public byte[] getLinkSubTypeTlvBodyAsByteArray() throws Exception { |
| 98 | byte[] linkSubTypeBody = null; |
| 99 | try { |
| 100 | linkSubTypeBody = InetAddress.getByName(this.linkId).getAddress(); |
| 101 | } catch (Exception e) { |
| 102 | log.debug("Error::LinkId:: {}", e.getMessage()); |
| 103 | throw new OspfParseException(OspfErrorType.OSPF_MESSAGE_ERROR, |
| 104 | OspfErrorType.BAD_MESSAGE); |
| 105 | } |
| 106 | return linkSubTypeBody; |
| 107 | } |
| 108 | |
| 109 | /** |
| 110 | * Returns this instance as string. |
| 111 | * |
| 112 | * @return this instance as string |
| 113 | */ |
| 114 | @Override |
| 115 | public String toString() { |
| 116 | return MoreObjects.toStringHelper(getClass()) |
| 117 | .add("linkId", linkId) |
| 118 | .toString(); |
| 119 | } |
| 120 | } |