Priyanka B | 0bee1f8 | 2015-10-13 15:39:49 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2015 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 | */ |
Jonathan Hart | 317f476 | 2015-11-09 16:05:36 -0800 | [diff] [blame] | 16 | package org.onosproject.bgpio.protocol.linkstate; |
Priyanka B | 0bee1f8 | 2015-10-13 15:39:49 +0530 | [diff] [blame] | 17 | |
| 18 | import java.util.LinkedList; |
| 19 | |
| 20 | import org.jboss.netty.buffer.ChannelBuffer; |
| 21 | import org.onosproject.bgpio.exceptions.BGPParseException; |
| 22 | import org.onosproject.bgpio.protocol.BGPPrefixLSNlri; |
| 23 | import org.onosproject.bgpio.protocol.NlriType; |
Jonathan Hart | 317f476 | 2015-11-09 16:05:36 -0800 | [diff] [blame] | 24 | import org.onosproject.bgpio.protocol.linkstate.BGPNodeLSNlriVer4.PROTOCOLTYPE; |
Priyanka B | 0bee1f8 | 2015-10-13 15:39:49 +0530 | [diff] [blame] | 25 | import org.onosproject.bgpio.types.BGPValueType; |
| 26 | import org.onosproject.bgpio.types.RouteDistinguisher; |
| 27 | import org.onosproject.bgpio.util.Constants; |
| 28 | import org.slf4j.Logger; |
| 29 | import org.slf4j.LoggerFactory; |
| 30 | |
| 31 | import com.google.common.base.MoreObjects; |
| 32 | |
| 33 | /** |
| 34 | * Implementation of Prefix IPV4 LS NLRI. |
| 35 | */ |
| 36 | public class BGPPrefixIPv4LSNlriVer4 implements BGPPrefixLSNlri { |
| 37 | |
| 38 | /* |
| 39 | * REFERENCE : draft-ietf-idr-ls-distribution-11 |
| 40 | * 0 1 2 3 |
| 41 | 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 |
| 42 | +-+-+-+-+-+-+-+-+ |
| 43 | | Protocol-ID | |
| 44 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 45 | | Identifier | |
| 46 | | (64 bits) | |
| 47 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 48 | // Local Node Descriptor (variable) // |
| 49 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 50 | // Prefix Descriptors (variable) // |
| 51 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 52 | |
| 53 | Figure : The IPv4/IPv6 Topology Prefix NLRI format |
| 54 | */ |
| 55 | |
| 56 | protected static final Logger log = LoggerFactory.getLogger(BGPPrefixIPv4LSNlriVer4.class); |
| 57 | |
| 58 | public static final int PREFIX_IPV4_NLRITYPE = 3; |
| 59 | public static final int IDENTIFIER_LENGTH = 16; |
| 60 | private long identifier; |
| 61 | private byte protocolId; |
| 62 | private RouteDistinguisher routeDistinguisher; |
| 63 | private boolean isVpn; |
| 64 | private BGPPrefixLSIdentifier bgpPrefixLSIdentifier; |
| 65 | |
| 66 | /** |
| 67 | * Resets parameters. |
| 68 | */ |
| 69 | public BGPPrefixIPv4LSNlriVer4() { |
| 70 | this.identifier = 0; |
| 71 | this.protocolId = 0; |
| 72 | this.bgpPrefixLSIdentifier = null; |
| 73 | this.routeDistinguisher = null; |
| 74 | this.isVpn = false; |
| 75 | } |
| 76 | |
| 77 | /** |
| 78 | * Constructor to initialize parameters for BGP PrefixLSNlri. |
| 79 | * |
| 80 | * @param identifier field in BGP PrefixLSNlri |
| 81 | * @param protocolId protocol Id |
| 82 | * @param bgpPrefixLSIdentifier prefix LS Identifier |
| 83 | * @param routeDistinguisher RouteDistinguisher |
| 84 | * @param isVpn vpn availability in message |
| 85 | */ |
| 86 | public BGPPrefixIPv4LSNlriVer4(long identifier, byte protocolId, BGPPrefixLSIdentifier bgpPrefixLSIdentifier, |
| 87 | RouteDistinguisher routeDistinguisher, boolean isVpn) { |
| 88 | this.identifier = identifier; |
| 89 | this.protocolId = protocolId; |
| 90 | this.bgpPrefixLSIdentifier = bgpPrefixLSIdentifier; |
| 91 | this.routeDistinguisher = routeDistinguisher; |
| 92 | this.isVpn = isVpn; |
| 93 | } |
| 94 | |
| 95 | /** |
| 96 | * Reads from channelBuffer and parses Prefix LS Nlri. |
| 97 | * |
| 98 | * @param cb ChannelBuffer |
| 99 | * @param afi Address family identifier |
| 100 | * @param safi Subsequent address family identifier |
| 101 | * @return object of BGPPrefixIPv4LSNlriVer4 |
| 102 | * @throws BGPParseException while parsing Prefix LS Nlri |
| 103 | */ |
| 104 | public static BGPPrefixIPv4LSNlriVer4 read(ChannelBuffer cb, short afi, byte safi) throws BGPParseException { |
| 105 | |
| 106 | boolean isVpn = false; |
| 107 | RouteDistinguisher routeDistinguisher = null; |
| 108 | if ((afi == Constants.AFI_VALUE) && (safi == Constants.VPN_SAFI_VALUE)) { |
| 109 | routeDistinguisher = new RouteDistinguisher(); |
| 110 | routeDistinguisher = RouteDistinguisher.read(cb); |
| 111 | isVpn = true; |
| 112 | } else { |
| 113 | isVpn = false; |
| 114 | } |
| 115 | byte protocolId = cb.readByte(); |
| 116 | long identifier = cb.readLong(); |
| 117 | |
| 118 | BGPPrefixLSIdentifier bgpPrefixLSIdentifier = new BGPPrefixLSIdentifier(); |
| 119 | bgpPrefixLSIdentifier = BGPPrefixLSIdentifier.parsePrefixIdendifier(cb, protocolId); |
| 120 | return new BGPPrefixIPv4LSNlriVer4(identifier, protocolId, bgpPrefixLSIdentifier, routeDistinguisher, isVpn); |
| 121 | } |
| 122 | |
| 123 | @Override |
| 124 | public NlriType getNlriType() { |
| 125 | return NlriType.PREFIX_IPV4; |
| 126 | } |
| 127 | |
| 128 | @Override |
| 129 | public NodeDescriptors getLocalNodeDescriptors() { |
| 130 | return this.bgpPrefixLSIdentifier.getLocalNodeDescriptors(); |
| 131 | } |
| 132 | |
| 133 | @Override |
| 134 | public long getIdentifier() { |
| 135 | return this.identifier; |
| 136 | } |
| 137 | |
| 138 | /** |
| 139 | * Set the prefix LS identifier. |
| 140 | * |
| 141 | * @param bgpPrefixLSIdentifier prefix identifier to set |
| 142 | */ |
| 143 | public void setPrefixLSIdentifier(BGPPrefixLSIdentifier bgpPrefixLSIdentifier) { |
| 144 | this.bgpPrefixLSIdentifier = bgpPrefixLSIdentifier; |
| 145 | } |
| 146 | |
| 147 | @Override |
| 148 | public PROTOCOLTYPE getProtocolId() throws BGPParseException { |
| 149 | switch (protocolId) { |
| 150 | case Constants.ISIS_LEVELONE: |
| 151 | return PROTOCOLTYPE.ISIS_LevelOne; |
| 152 | case Constants.ISIS_LEVELTWO: |
| 153 | return PROTOCOLTYPE.ISIS_LevelTwo; |
| 154 | case Constants.OSPFV2: |
| 155 | return PROTOCOLTYPE.OSPFv2; |
| 156 | case Constants.DIRECT: |
| 157 | return PROTOCOLTYPE.Direct; |
| 158 | case Constants.STATIC_CONFIGURATION: |
| 159 | return PROTOCOLTYPE.Static_Configuration; |
| 160 | case Constants.OSPFV3: |
| 161 | return PROTOCOLTYPE.OSPFv3; |
| 162 | default: |
| 163 | throw new BGPParseException("protocol id not valid"); |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | /** |
| 168 | * Returns whether VPN is present or not. |
| 169 | * |
| 170 | * @return whether VPN is present or not |
| 171 | */ |
| 172 | public boolean isVpnPresent() { |
| 173 | return this.isVpn; |
| 174 | } |
| 175 | |
| 176 | /** |
| 177 | * Returns Prefix Identifier. |
| 178 | * |
| 179 | * @return Prefix Identifier |
| 180 | */ |
| 181 | public BGPPrefixLSIdentifier getPrefixIdentifier() { |
| 182 | return this.bgpPrefixLSIdentifier; |
| 183 | } |
| 184 | |
| 185 | @Override |
| 186 | public RouteDistinguisher getRouteDistinguisher() { |
| 187 | return this.routeDistinguisher; |
| 188 | } |
| 189 | |
| 190 | @Override |
| 191 | public LinkedList<BGPValueType> getPrefixdescriptor() { |
| 192 | return this.bgpPrefixLSIdentifier.getPrefixdescriptor(); |
| 193 | } |
| 194 | |
| 195 | @Override |
| 196 | public String toString() { |
| 197 | return MoreObjects.toStringHelper(getClass()) |
| 198 | .omitNullValues() |
| 199 | .add("protocolId", protocolId) |
| 200 | .add("identifier", identifier) |
| 201 | .add("RouteDistinguisher ", routeDistinguisher) |
| 202 | .add("bgpPrefixLSIdentifier", bgpPrefixLSIdentifier) |
| 203 | .toString(); |
| 204 | } |
Jonathan Hart | 317f476 | 2015-11-09 16:05:36 -0800 | [diff] [blame] | 205 | } |