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/*
* 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.protocol.linkstate;
import org.jboss.netty.buffer.ChannelBuffer;
import org.onosproject.bgpio.exceptions.BGPParseException;
import org.onosproject.bgpio.protocol.BGPNodeLSNlri;
import org.onosproject.bgpio.protocol.NlriType;
import org.onosproject.bgpio.types.BGPErrorType;
import org.onosproject.bgpio.types.RouteDistinguisher;
import org.onosproject.bgpio.util.Constants;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.base.MoreObjects;
/**
* Implementation of Node LS NLRI.
*/
public class BGPNodeLSNlriVer4 implements BGPNodeLSNlri {
/*
*REFERENCE : draft-ietf-idr-ls-distribution-11
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+
| Protocol-ID |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Identifier |
| (64 bits) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// Local Node Descriptors (variable) //
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure : The Node NLRI format
*/
protected static final Logger log = LoggerFactory.getLogger(BGPNodeLSNlriVer4.class);
public static final int NODE_NLRITYPE = 1;
public static final int IDENTIFIER_LENGTH = 16;
private long identifier;
private byte protocolId;
private BGPNodeLSIdentifier localNodeDescriptors;
private RouteDistinguisher routeDistinguisher;
private boolean isVpn;
/**
* Enum to provide PROTOCOLTYPE.
*/
public enum PROTOCOLTYPE {
ISIS_LevelOne(1), ISIS_LevelTwo(2), OSPFv2(3), Direct(4), Static_Configuration(5), OSPFv3(6);
int value;
/**
* Assign val with the value as the protocol type.
*
* @param val protocol type
*/
PROTOCOLTYPE(int val) {
value = val;
}
/**
* Returns value of protocol type.
*
* @return protocol type
*/
public byte getType() {
return (byte) value;
}
}
/**
* Reset fields.
*/
public BGPNodeLSNlriVer4() {
this.identifier = 0;
this.protocolId = 0;
this.localNodeDescriptors = null;
this.routeDistinguisher = null;
this.isVpn = false;
}
/**
* Constructors to initialize its parameters.
*
* @param identifier of LinkState Nlri
* @param protocolId of LinkState Nlri
* @param localNodeDescriptors local node descriptors
* @param isVpn true if VPN info is present
* @param routeDistinguisher unique for each VPN
*/
BGPNodeLSNlriVer4(long identifier, byte protocolId, BGPNodeLSIdentifier localNodeDescriptors, boolean isVpn,
RouteDistinguisher routeDistinguisher) {
this.identifier = identifier;
this.protocolId = protocolId;
this.localNodeDescriptors = localNodeDescriptors;
this.routeDistinguisher = routeDistinguisher;
this.isVpn = isVpn;
}
/**
* Reads from channelBuffer and parses Node LS Nlri.
*
* @param cb ChannelBuffer
* @param afi Address Family Identifier
* @param safi Subsequent Address Family Identifier
* @return object of this class
* @throws BGPParseException while parsing node descriptors
*/
public static BGPNodeLSNlriVer4 read(ChannelBuffer cb, short afi, byte safi) throws BGPParseException {
boolean isVpn = false;
RouteDistinguisher routeDistinguisher = null;
if ((afi == Constants.AFI_VALUE) && (safi == Constants.VPN_SAFI_VALUE)) {
routeDistinguisher = new RouteDistinguisher();
routeDistinguisher = RouteDistinguisher.read(cb);
isVpn = true;
} else {
isVpn = false;
}
byte protocolId = cb.readByte();
long identifier = cb.readLong();
// Parse Local Node Descriptors
BGPNodeLSIdentifier localNodeDescriptors = new BGPNodeLSIdentifier();
localNodeDescriptors = BGPNodeLSIdentifier.parseLocalNodeDescriptors(cb, protocolId);
return new BGPNodeLSNlriVer4(identifier, protocolId, localNodeDescriptors, isVpn, routeDistinguisher);
}
@Override
public NlriType getNlriType() {
return NlriType.NODE;
}
@Override
public BGPNodeLSIdentifier getLocalNodeDescriptors() {
return this.localNodeDescriptors;
}
/**
* Returns whether VPN is present or not.
*
* @return whether VPN is present or not
*/
public boolean isVpnPresent() {
return this.isVpn;
}
@Override
public RouteDistinguisher getRouteDistinguisher() {
return this.routeDistinguisher;
}
@Override
public long getIdentifier() {
return this.identifier;
}
/**
* Set the node LS identifier.
*
* @param localNodeDescriptors node LS identifier to set
*/
public void setNodeLSIdentifier(BGPNodeLSIdentifier localNodeDescriptors) {
this.localNodeDescriptors = localNodeDescriptors;
}
@Override
public PROTOCOLTYPE getProtocolId() throws BGPParseException {
switch (protocolId) {
case Constants.ISIS_LEVELONE:
return PROTOCOLTYPE.ISIS_LevelOne;
case Constants.ISIS_LEVELTWO:
return PROTOCOLTYPE.ISIS_LevelTwo;
case Constants.OSPFV2:
return PROTOCOLTYPE.OSPFv2;
case Constants.DIRECT:
return PROTOCOLTYPE.Direct;
case Constants.STATIC_CONFIGURATION:
return PROTOCOLTYPE.Static_Configuration;
case Constants.OSPFV3:
return PROTOCOLTYPE.OSPFv3;
default:
throw new BGPParseException(BGPErrorType.UPDATE_MESSAGE_ERROR, (byte) 0, null);
}
}
@Override
public String toString() {
return MoreObjects.toStringHelper(getClass())
.omitNullValues()
.add("protocolId", protocolId)
.add("identifier", identifier)
.add("RouteDistinguisher ", routeDistinguisher)
.add("localNodeDescriptors", localNodeDescriptors)
.toString();
}
}
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