diff options
Diffstat (limited to 'framework/src/onos/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/linkstate/BgpPrefixIPv4LSNlriVer4.java')
| -rw-r--r-- | framework/src/onos/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/linkstate/BgpPrefixIPv4LSNlriVer4.java | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/framework/src/onos/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/linkstate/BgpPrefixIPv4LSNlriVer4.java b/framework/src/onos/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/linkstate/BgpPrefixIPv4LSNlriVer4.java new file mode 100644 index 00000000..49cb74bd --- /dev/null +++ b/framework/src/onos/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/linkstate/BgpPrefixIPv4LSNlriVer4.java @@ -0,0 +1,205 @@ +/* + * 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 java.util.List; + +import org.jboss.netty.buffer.ChannelBuffer; +import org.onosproject.bgpio.exceptions.BgpParseException; +import org.onosproject.bgpio.protocol.BgpPrefixLSNlri; +import org.onosproject.bgpio.protocol.NlriType; +import org.onosproject.bgpio.protocol.linkstate.BgpNodeLSNlriVer4.ProtocolType; +import org.onosproject.bgpio.types.BgpValueType; +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 Prefix IPV4 LS NLRI. + */ +public class BgpPrefixIPv4LSNlriVer4 implements BgpPrefixLSNlri { + + /* + * 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 Descriptor (variable) // + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + // Prefix Descriptors (variable) // + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + + Figure : The IPv4/IPv6 Topology Prefix NLRI format + */ + + protected static final Logger log = LoggerFactory.getLogger(BgpPrefixIPv4LSNlriVer4.class); + + public static final int PREFIX_IPV4_NLRITYPE = 3; + public static final int IDENTIFIER_LENGTH = 16; + private long identifier; + private byte protocolId; + private RouteDistinguisher routeDistinguisher; + private boolean isVpn; + private BgpPrefixLSIdentifier bgpPrefixLSIdentifier; + + /** + * Resets parameters. + */ + public BgpPrefixIPv4LSNlriVer4() { + this.identifier = 0; + this.protocolId = 0; + this.bgpPrefixLSIdentifier = null; + this.routeDistinguisher = null; + this.isVpn = false; + } + + /** + * Constructor to initialize parameters for BGP PrefixLSNlri. + * + * @param identifier field in BGP PrefixLSNlri + * @param protocolId protocol Id + * @param bgpPrefixLSIdentifier prefix LS Identifier + * @param routeDistinguisher RouteDistinguisher + * @param isVpn vpn availability in message + */ + public BgpPrefixIPv4LSNlriVer4(long identifier, byte protocolId, BgpPrefixLSIdentifier bgpPrefixLSIdentifier, + RouteDistinguisher routeDistinguisher, boolean isVpn) { + this.identifier = identifier; + this.protocolId = protocolId; + this.bgpPrefixLSIdentifier = bgpPrefixLSIdentifier; + this.routeDistinguisher = routeDistinguisher; + this.isVpn = isVpn; + } + + /** + * Reads from channelBuffer and parses Prefix LS Nlri. + * + * @param cb ChannelBuffer + * @param afi Address family identifier + * @param safi Subsequent address family identifier + * @return object of BGPPrefixIPv4LSNlriVer4 + * @throws BgpParseException while parsing Prefix LS Nlri + */ + public static BgpPrefixIPv4LSNlriVer4 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(); + + BgpPrefixLSIdentifier bgpPrefixLSIdentifier = new BgpPrefixLSIdentifier(); + bgpPrefixLSIdentifier = BgpPrefixLSIdentifier.parsePrefixIdendifier(cb, protocolId); + return new BgpPrefixIPv4LSNlriVer4(identifier, protocolId, bgpPrefixLSIdentifier, routeDistinguisher, isVpn); + } + + @Override + public NlriType getNlriType() { + return NlriType.PREFIX_IPV4; + } + + @Override + public NodeDescriptors getLocalNodeDescriptors() { + return this.bgpPrefixLSIdentifier.getLocalNodeDescriptors(); + } + + @Override + public long getIdentifier() { + return this.identifier; + } + + /** + * Set the prefix LS identifier. + * + * @param bgpPrefixLSIdentifier prefix identifier to set + */ + public void setPrefixLSIdentifier(BgpPrefixLSIdentifier bgpPrefixLSIdentifier) { + this.bgpPrefixLSIdentifier = bgpPrefixLSIdentifier; + } + + @Override + public ProtocolType getProtocolId() throws BgpParseException { + switch (protocolId) { + case Constants.ISIS_LEVELONE: + return ProtocolType.ISIS_LEVEL_ONE; + case Constants.ISIS_LEVELTWO: + return ProtocolType.ISIS_LEVEL_TWO; + case Constants.OSPFV2: + return ProtocolType.OSPF_V2; + case Constants.DIRECT: + return ProtocolType.DIRECT; + case Constants.STATIC_CONFIGURATION: + return ProtocolType.STATIC_CONFIGURATION; + case Constants.OSPFV3: + return ProtocolType.OSPF_V3; + default: + throw new BgpParseException("protocol id not valid"); + } + } + + /** + * Returns whether VPN is present or not. + * + * @return whether VPN is present or not + */ + public boolean isVpnPresent() { + return this.isVpn; + } + + /** + * Returns Prefix Identifier. + * + * @return Prefix Identifier + */ + public BgpPrefixLSIdentifier getPrefixIdentifier() { + return this.bgpPrefixLSIdentifier; + } + + @Override + public RouteDistinguisher getRouteDistinguisher() { + return this.routeDistinguisher; + } + + @Override + public List<BgpValueType> getPrefixdescriptor() { + return this.bgpPrefixLSIdentifier.getPrefixdescriptor(); + } + + @Override + public String toString() { + return MoreObjects.toStringHelper(getClass()) + .omitNullValues() + .add("protocolId", protocolId) + .add("identifier", identifier) + .add("RouteDistinguisher ", routeDistinguisher) + .add("bgpPrefixLSIdentifier", bgpPrefixLSIdentifier) + .toString(); + } +} |