Satish K | e107e66 | 2015-09-21 19:00:17 +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 | */ |
| 16 | |
| 17 | package org.onosproject.bgp.controller.impl; |
| 18 | |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 19 | import java.io.IOException; |
Vidyashree Rama | ee29325 | 2015-11-18 17:00:11 +0530 | [diff] [blame^] | 20 | import java.net.InetAddress; |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 21 | import java.net.InetSocketAddress; |
| 22 | import java.net.SocketAddress; |
Vidyashree Rama | ee29325 | 2015-11-18 17:00:11 +0530 | [diff] [blame^] | 23 | import java.net.UnknownHostException; |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 24 | import java.nio.channels.ClosedChannelException; |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 25 | import java.util.Collections; |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 26 | import java.util.Date; |
| 27 | import java.util.List; |
Vidyashree Rama | ee29325 | 2015-11-18 17:00:11 +0530 | [diff] [blame^] | 28 | import java.util.LinkedList; |
| 29 | import java.util.ListIterator; |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 30 | import java.util.concurrent.RejectedExecutionException; |
| 31 | |
Vidyashree Rama | ee29325 | 2015-11-18 17:00:11 +0530 | [diff] [blame^] | 32 | import org.jboss.netty.buffer.ChannelBuffer; |
| 33 | import org.jboss.netty.buffer.ChannelBuffers; |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 34 | import org.jboss.netty.channel.Channel; |
| 35 | import org.jboss.netty.channel.ChannelHandlerContext; |
| 36 | import org.jboss.netty.channel.ChannelStateEvent; |
| 37 | import org.jboss.netty.channel.ExceptionEvent; |
| 38 | import org.jboss.netty.channel.MessageEvent; |
Satish K | e107e66 | 2015-09-21 19:00:17 +0530 | [diff] [blame] | 39 | import org.jboss.netty.handler.timeout.IdleStateAwareChannelHandler; |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 40 | import org.jboss.netty.handler.timeout.ReadTimeoutException; |
| 41 | import org.jboss.netty.handler.timeout.ReadTimeoutHandler; |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 42 | import org.onlab.packet.Ip4Address; |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 43 | import org.onlab.packet.IpAddress; |
| 44 | import org.onosproject.bgp.controller.BGPCfg; |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 45 | import org.onosproject.bgp.controller.BGPController; |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 46 | import org.onosproject.bgp.controller.BGPId; |
| 47 | import org.onosproject.bgp.controller.BGPPeer; |
| 48 | import org.onosproject.bgp.controller.BGPPeerCfg; |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 49 | import org.onosproject.bgp.controller.impl.BGPControllerImpl.BGPPeerManagerImpl; |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 50 | import org.onosproject.bgpio.exceptions.BGPParseException; |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 51 | import org.onosproject.bgpio.protocol.BGPFactory; |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 52 | import org.onosproject.bgpio.protocol.BGPMessage; |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 53 | import org.onosproject.bgpio.protocol.BGPOpenMsg; |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 54 | import org.onosproject.bgpio.protocol.BGPType; |
| 55 | import org.onosproject.bgpio.protocol.BGPVersion; |
Vidyashree Rama | ee29325 | 2015-11-18 17:00:11 +0530 | [diff] [blame^] | 56 | import org.onosproject.bgpio.types.BGPErrorType; |
| 57 | import org.onosproject.bgpio.types.BGPValueType; |
| 58 | import org.onosproject.bgpio.types.FourOctetAsNumCapabilityTlv; |
| 59 | import org.onosproject.bgpio.types.MultiProtocolExtnCapabilityTlv; |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 60 | import org.slf4j.Logger; |
| 61 | import org.slf4j.LoggerFactory; |
Satish K | e107e66 | 2015-09-21 19:00:17 +0530 | [diff] [blame] | 62 | |
| 63 | /** |
| 64 | * Channel handler deals with the bgp peer connection and dispatches messages from peer to the appropriate locations. |
| 65 | */ |
| 66 | class BGPChannelHandler extends IdleStateAwareChannelHandler { |
| 67 | |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 68 | private static final Logger log = LoggerFactory.getLogger(BGPChannelHandler.class); |
Vidyashree Rama | ee29325 | 2015-11-18 17:00:11 +0530 | [diff] [blame^] | 69 | static final int BGP_MIN_HOLDTIME = 3; |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 70 | static final int BGP_MAX_KEEPALIVE_INTERVAL = 3; |
| 71 | private BGPPeer bgpPeer; |
| 72 | private BGPId thisbgpId; |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 73 | private Channel channel; |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 74 | private BGPKeepAliveTimer keepAliveTimer = null; |
| 75 | private short peerHoldTime = 0; |
| 76 | private short negotiatedHoldTime = 0; |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 77 | private long peerAsNum; |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 78 | private int peerIdentifier; |
| 79 | private BGPPacketStatsImpl bgpPacketStats; |
| 80 | static final int MAX_WRONG_COUNT_PACKET = 5; |
Vidyashree Rama | ee29325 | 2015-11-18 17:00:11 +0530 | [diff] [blame^] | 81 | static final byte MULTI_PROTOCOL_EXTN_CAPA_TYPE = 1; |
| 82 | static final byte FOUR_OCTET_AS_NUM_CAPA_TYPE = 65; |
| 83 | static final int AS_TRANS = 23456; |
| 84 | static final int MAX_AS2_NUM = 65535; |
| 85 | static final short AFI = 16388; |
| 86 | static final byte RES = 0; |
| 87 | static final byte SAFI = 71; |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 88 | |
| 89 | // State needs to be volatile because the HandshakeTimeoutHandler |
| 90 | // needs to check if the handshake is complete |
| 91 | private volatile ChannelState state; |
| 92 | |
| 93 | // When a bgp peer with a ip addresss is found (i.e we already have a |
| 94 | // connected peer with the same ip), the new peer is immediately |
| 95 | // disconnected. At that point netty callsback channelDisconnected() which |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 96 | // proceeds to cleaup peer state - we need to ensure that it does not |
| 97 | // cleanup |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 98 | // peer state for the older (still connected) peer |
| 99 | private volatile Boolean duplicateBGPIdFound; |
| 100 | // Indicates the bgp version used by this bgp peer |
| 101 | protected BGPVersion bgpVersion; |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 102 | private BGPController bgpController; |
| 103 | protected BGPFactory factory4; |
| 104 | private boolean isIbgpSession; |
| 105 | private BgpSessionInfoImpl sessionInfo; |
| 106 | private BGPPeerManagerImpl peerManager; |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 107 | private InetSocketAddress inetAddress; |
| 108 | private IpAddress ipAddress; |
| 109 | private SocketAddress address; |
| 110 | private String peerAddr; |
| 111 | private BGPCfg bgpconfig; |
| 112 | |
Satish K | e107e66 | 2015-09-21 19:00:17 +0530 | [diff] [blame] | 113 | /** |
| 114 | * Create a new unconnected BGPChannelHandler. |
| 115 | * |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 116 | * @param bgpController bgp controller |
Satish K | e107e66 | 2015-09-21 19:00:17 +0530 | [diff] [blame] | 117 | */ |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 118 | BGPChannelHandler(BGPController bgpController) { |
| 119 | this.bgpController = bgpController; |
| 120 | this.peerManager = (BGPPeerManagerImpl) bgpController.peerManager(); |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 121 | this.state = ChannelState.IDLE; |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 122 | this.factory4 = Controller.getBGPMessageFactory4(); |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 123 | this.duplicateBGPIdFound = Boolean.FALSE; |
| 124 | this.bgpPacketStats = new BGPPacketStatsImpl(); |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 125 | this.bgpconfig = bgpController.getConfig(); |
Satish K | e107e66 | 2015-09-21 19:00:17 +0530 | [diff] [blame] | 126 | } |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 127 | |
| 128 | // To disconnect peer session. |
| 129 | public void disconnectPeer() { |
| 130 | bgpPeer.disconnectPeer(); |
| 131 | } |
| 132 | |
| 133 | // ************************* |
| 134 | // Channel State Machine |
| 135 | // ************************* |
| 136 | |
| 137 | /** |
| 138 | * The state machine for handling the peer/channel state. All state transitions should happen from within the state |
| 139 | * machine (and not from other parts of the code) |
| 140 | */ |
| 141 | enum ChannelState { |
| 142 | /** |
| 143 | * Initial state before channel is connected. |
| 144 | */ |
| 145 | IDLE(false) { |
| 146 | |
| 147 | }, |
| 148 | |
| 149 | OPENSENT(false) { |
| 150 | @Override |
| 151 | void processBGPMessage(BGPChannelHandler h, BGPMessage m) throws IOException, BGPParseException { |
| 152 | log.debug("message received in OPENSENT state"); |
| 153 | // check for OPEN message |
| 154 | if (m.getType() != BGPType.OPEN) { |
| 155 | // When the message type is not keep alive message increment the wrong packet statistics |
| 156 | h.processUnknownMsg(); |
| 157 | log.debug("Message is not OPEN message"); |
| 158 | } else { |
| 159 | log.debug("Sending keep alive message in OPENSENT state"); |
| 160 | h.bgpPacketStats.addInPacket(); |
| 161 | |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 162 | BGPOpenMsg pOpenmsg = (BGPOpenMsg) m; |
| 163 | h.peerIdentifier = pOpenmsg.getBgpId(); |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 164 | |
| 165 | // validate capabilities and open msg |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 166 | if (h.openMsgValidation(h, pOpenmsg)) { |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 167 | log.debug("Sending handshake OPEN message"); |
| 168 | |
| 169 | /* |
| 170 | * RFC 4271, section 4.2: Upon receipt of an OPEN message, a BGP speaker MUST calculate the |
| 171 | * value of the Hold Timer by using the smaller of its configured Hold Time and the Hold Time |
| 172 | * received in the OPEN message |
| 173 | */ |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 174 | h.peerHoldTime = pOpenmsg.getHoldTime(); |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 175 | if (h.peerHoldTime < h.bgpconfig.getHoldTime()) { |
| 176 | h.channel.getPipeline().replace("holdTime", |
| 177 | "holdTime", |
| 178 | new ReadTimeoutHandler(BGPPipelineFactory.TIMER, |
| 179 | h.peerHoldTime)); |
| 180 | } |
| 181 | |
| 182 | log.info("Hold Time : " + h.peerHoldTime); |
| 183 | |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 184 | // update AS number |
| 185 | h.peerAsNum = pOpenmsg.getAsNumber(); |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 186 | } |
| 187 | |
| 188 | // Send keepalive message to peer. |
| 189 | h.sendKeepAliveMessage(); |
| 190 | h.bgpPacketStats.addOutPacket(); |
| 191 | h.setState(OPENCONFIRM); |
| 192 | h.bgpconfig.setPeerConnState(h.peerAddr, BGPPeerCfg.State.OPENCONFIRM); |
| 193 | } |
| 194 | } |
| 195 | }, |
| 196 | |
| 197 | OPENWAIT(false) { |
| 198 | @Override |
| 199 | void processBGPMessage(BGPChannelHandler h, BGPMessage m) throws IOException, BGPParseException { |
| 200 | log.debug("Message received in OPEN WAIT State"); |
| 201 | |
| 202 | // check for open message |
| 203 | if (m.getType() != BGPType.OPEN) { |
| 204 | // When the message type is not open message increment the wrong packet statistics |
| 205 | h.processUnknownMsg(); |
| 206 | log.debug("Message is not OPEN message"); |
| 207 | } else { |
| 208 | h.bgpPacketStats.addInPacket(); |
| 209 | |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 210 | BGPOpenMsg pOpenmsg = (BGPOpenMsg) m; |
| 211 | h.peerIdentifier = pOpenmsg.getBgpId(); |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 212 | |
| 213 | // Validate open message |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 214 | if (h.openMsgValidation(h, pOpenmsg)) { |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 215 | log.debug("Sending handshake OPEN message"); |
| 216 | |
| 217 | /* |
| 218 | * RFC 4271, section 4.2: Upon receipt of an OPEN message, a BGP speaker MUST calculate the |
| 219 | * value of the Hold Timer by using the smaller of its configured Hold Time and the Hold Time |
| 220 | * received in the OPEN message |
| 221 | */ |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 222 | h.peerHoldTime = pOpenmsg.getHoldTime(); |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 223 | if (h.peerHoldTime < h.bgpconfig.getHoldTime()) { |
| 224 | h.channel.getPipeline().replace("holdTime", |
| 225 | "holdTime", |
| 226 | new ReadTimeoutHandler(BGPPipelineFactory.TIMER, |
| 227 | h.peerHoldTime)); |
| 228 | } |
| 229 | |
| 230 | log.debug("Hold Time : " + h.peerHoldTime); |
| 231 | |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 232 | // update AS number |
| 233 | h.peerAsNum = pOpenmsg.getAsNumber(); |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 234 | |
| 235 | h.sendHandshakeOpenMessage(); |
| 236 | h.bgpPacketStats.addOutPacket(); |
| 237 | h.setState(OPENCONFIRM); |
| 238 | } |
| 239 | } |
| 240 | } |
| 241 | }, |
| 242 | |
| 243 | OPENCONFIRM(false) { |
| 244 | @Override |
| 245 | void processBGPMessage(BGPChannelHandler h, BGPMessage m) throws IOException, BGPParseException { |
| 246 | log.debug("Message received in OPENCONFIRM state"); |
| 247 | // check for keep alive message |
| 248 | if (m.getType() != BGPType.KEEP_ALIVE) { |
| 249 | // When the message type is not keep alive message handle the wrong packet |
| 250 | h.processUnknownMsg(); |
| 251 | log.debug("Message is not KEEPALIVE message"); |
| 252 | } else { |
| 253 | |
| 254 | // Set the peer connected status |
| 255 | h.bgpPacketStats.addInPacket(); |
| 256 | log.debug("Sending keep alive message in OPENCONFIRM state"); |
| 257 | |
| 258 | final InetSocketAddress inetAddress = (InetSocketAddress) h.address; |
| 259 | h.thisbgpId = BGPId.bgpId(IpAddress.valueOf(inetAddress.getAddress())); |
| 260 | |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 261 | // set session parameters |
| 262 | h.negotiatedHoldTime = (h.peerHoldTime < h.bgpconfig.getHoldTime()) ? h.peerHoldTime |
| 263 | : h.bgpconfig.getHoldTime(); |
| 264 | h.sessionInfo = new BgpSessionInfoImpl(h.thisbgpId, h.bgpVersion, h.peerAsNum, h.peerHoldTime, |
| 265 | h.peerIdentifier, h.negotiatedHoldTime, h.isIbgpSession); |
| 266 | |
| 267 | h.bgpPeer = h.peerManager.getBGPPeerInstance(h.bgpController, h.sessionInfo, h.bgpPacketStats); |
| 268 | // set the status of bgp as connected |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 269 | h.bgpPeer.setConnected(true); |
| 270 | h.bgpPeer.setChannel(h.channel); |
| 271 | |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 272 | /* |
| 273 | * RFC 4271, When an OPEN message is received, sends a KEEPALIVE message, If the negotiated hold |
| 274 | * time value is zero, then the HoldTimer and KeepaliveTimer are not started. A reasonable maximum |
| 275 | * time between KEEPALIVE messages would be one third of the Hold Time interval. |
| 276 | */ |
| 277 | h.sendKeepAliveMessage(); |
| 278 | |
| 279 | if (h.negotiatedHoldTime != 0) { |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 280 | h.keepAliveTimer = new BGPKeepAliveTimer(h, |
| 281 | (h.negotiatedHoldTime / BGP_MAX_KEEPALIVE_INTERVAL)); |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 282 | } |
| 283 | |
| 284 | h.bgpPacketStats.addOutPacket(); |
| 285 | |
| 286 | // set the state handshake completion. |
| 287 | h.setHandshakeComplete(true); |
| 288 | |
| 289 | if (!h.peerManager.addConnectedPeer(h.thisbgpId, h.bgpPeer)) { |
| 290 | /* |
| 291 | * RFC 4271, Section 6.8, Based on the value of the BGP identifier, a convention is established |
| 292 | * for detecting which BGP connection is to be preserved when a collision occurs. The convention |
| 293 | * is to compare the BGP Identifiers of the peers involved in the collision and to retain only |
| 294 | * the connection initiated by the BGP speaker with the higher-valued BGP Identifier.. |
| 295 | */ |
| 296 | // TODO: Connection collision handling. |
| 297 | disconnectDuplicate(h); |
| 298 | } else { |
| 299 | h.setState(ESTABLISHED); |
| 300 | h.bgpconfig.setPeerConnState(h.peerAddr, BGPPeerCfg.State.ESTABLISHED); |
| 301 | } |
| 302 | } |
| 303 | } |
| 304 | }, |
| 305 | |
| 306 | ESTABLISHED(true) { |
| 307 | @Override |
| 308 | void processBGPMessage(BGPChannelHandler h, BGPMessage m) throws IOException, BGPParseException { |
| 309 | log.debug("Message received in established state " + m.getType()); |
| 310 | // dispatch the message |
| 311 | h.dispatchMessage(m); |
| 312 | } |
| 313 | }; |
| 314 | |
| 315 | private boolean handshakeComplete; |
| 316 | |
| 317 | ChannelState(boolean handshakeComplete) { |
| 318 | this.handshakeComplete = handshakeComplete; |
| 319 | } |
| 320 | |
| 321 | /** |
| 322 | * Is this a state in which the handshake has completed? |
| 323 | * |
| 324 | * @return true if the handshake is complete |
| 325 | */ |
| 326 | public boolean isHandshakeComplete() { |
| 327 | return this.handshakeComplete; |
| 328 | } |
| 329 | |
| 330 | /** |
| 331 | * Disconnect duplicate peer connection. |
| 332 | * |
| 333 | * @param h channel handler |
| 334 | */ |
| 335 | protected void disconnectDuplicate(BGPChannelHandler h) { |
| 336 | log.error("Duplicated BGP IP or incompleted cleanup - " + "" + "disconnecting channel {}", |
| 337 | h.getPeerInfoString()); |
| 338 | h.duplicateBGPIdFound = Boolean.TRUE; |
| 339 | h.channel.disconnect(); |
| 340 | } |
| 341 | |
| 342 | // set handshake completion status |
| 343 | public void setHandshakeComplete(boolean handshakeComplete) { |
| 344 | this.handshakeComplete = handshakeComplete; |
| 345 | } |
| 346 | |
| 347 | void processBGPMessage(BGPChannelHandler bgpChannelHandler, BGPMessage pm) |
| 348 | throws IOException, BGPParseException { |
| 349 | // TODO Auto-generated method stub |
| 350 | log.debug("BGP message stub"); |
| 351 | } |
| 352 | |
| 353 | } |
| 354 | |
| 355 | // ************************* |
| 356 | // Channel handler methods |
| 357 | // ************************* |
| 358 | |
| 359 | @Override |
| 360 | public void channelConnected(ChannelHandlerContext ctx, ChannelStateEvent e) throws Exception { |
| 361 | |
| 362 | channel = e.getChannel(); |
| 363 | log.info("BGP connected from {}", channel.getRemoteAddress()); |
| 364 | |
| 365 | address = channel.getRemoteAddress(); |
| 366 | if (!(address instanceof InetSocketAddress)) { |
| 367 | throw new IOException("Invalid peer connection."); |
| 368 | } |
| 369 | |
| 370 | // Connection should establish only if local ip and Autonomous system number is configured. |
| 371 | if (bgpconfig.getState() != BGPCfg.State.IP_AS_CONFIGURED) { |
| 372 | channel.close(); |
| 373 | log.info("BGP local AS and router ID not configured"); |
| 374 | return; |
| 375 | } |
| 376 | |
| 377 | inetAddress = (InetSocketAddress) address; |
| 378 | ipAddress = IpAddress.valueOf(inetAddress.getAddress()); |
| 379 | peerAddr = ipAddress.toString(); |
| 380 | |
| 381 | // if peer is not configured disconnect session |
| 382 | if (!bgpconfig.isPeerConfigured(peerAddr)) { |
| 383 | log.debug("Peer is not configured {}", peerAddr); |
| 384 | channel.close(); |
| 385 | return; |
| 386 | } |
| 387 | |
| 388 | // if connection is already established close channel |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 389 | if (peerManager.isPeerConnected(BGPId.bgpId(IpAddress.valueOf(peerAddr)))) { |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 390 | log.debug("Duplicate connection received, peer {}", peerAddr); |
| 391 | channel.close(); |
| 392 | return; |
| 393 | } |
| 394 | |
| 395 | if (null != channel.getPipeline().get("PassiveHandler")) { |
| 396 | log.info("BGP handle connection request from peer"); |
| 397 | // Wait for open message from bgp peer |
| 398 | setState(ChannelState.OPENWAIT); |
| 399 | } else if (null != channel.getPipeline().get("ActiveHandler")) { |
| 400 | log.info("BGP handle connection response from peer"); |
| 401 | |
| 402 | sendHandshakeOpenMessage(); |
| 403 | bgpPacketStats.addOutPacket(); |
| 404 | setState(ChannelState.OPENSENT); |
| 405 | bgpconfig.setPeerConnState(peerAddr, BGPPeerCfg.State.OPENSENT); |
| 406 | } |
| 407 | } |
| 408 | |
| 409 | @Override |
| 410 | public void channelDisconnected(ChannelHandlerContext ctx, ChannelStateEvent e) throws Exception { |
| 411 | |
| 412 | channel = e.getChannel(); |
| 413 | log.info("BGP disconnected callback for bgp:{}. Cleaning up ...", getPeerInfoString()); |
| 414 | |
| 415 | address = channel.getRemoteAddress(); |
| 416 | if (!(address instanceof InetSocketAddress)) { |
| 417 | throw new IOException("Invalid peer connection."); |
| 418 | } |
| 419 | |
| 420 | inetAddress = (InetSocketAddress) address; |
| 421 | ipAddress = IpAddress.valueOf(inetAddress.getAddress()); |
| 422 | peerAddr = ipAddress.toString(); |
| 423 | |
| 424 | if (thisbgpId != null) { |
| 425 | if (!duplicateBGPIdFound) { |
| 426 | // if the disconnected peer (on this ChannelHandler) |
| 427 | // was not one with a duplicate, it is safe to remove all |
| 428 | // state for it at the controller. Notice that if the disconnected |
| 429 | // peer was a duplicate-ip, calling the method below would clear |
| 430 | // all state for the original peer (with the same ip), |
| 431 | // which we obviously don't want. |
| 432 | log.debug("{}:removal called", getPeerInfoString()); |
| 433 | if (bgpPeer != null) { |
| 434 | peerManager.removeConnectedPeer(thisbgpId); |
| 435 | } |
| 436 | } else { |
| 437 | // A duplicate was disconnected on this ChannelHandler, |
| 438 | // this is the same peer reconnecting, but the original state was |
| 439 | // not cleaned up - XXX check liveness of original ChannelHandler |
| 440 | log.debug("{}:duplicate found", getPeerInfoString()); |
| 441 | duplicateBGPIdFound = Boolean.FALSE; |
| 442 | } |
| 443 | |
| 444 | if (null != keepAliveTimer) { |
| 445 | keepAliveTimer.getKeepAliveTimer().cancel(); |
| 446 | } |
| 447 | } else { |
| 448 | log.warn("No bgp ip in channelHandler registered for " + "disconnected peer {}", getPeerInfoString()); |
| 449 | } |
| 450 | } |
| 451 | |
| 452 | @Override |
| 453 | public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e) throws Exception { |
| 454 | |
| 455 | log.info("[exceptionCaught]: " + e.toString()); |
| 456 | |
| 457 | if (e.getCause() instanceof ReadTimeoutException) { |
| 458 | if ((ChannelState.OPENWAIT == state) || (ChannelState.OPENSENT == state)) { |
| 459 | |
| 460 | // When ReadTimeout timer is expired in OPENWAIT/OPENSENT state, it is considered |
| 461 | // TODO: Send notification |
| 462 | channel.close(); |
| 463 | state = ChannelState.IDLE; |
| 464 | return; |
| 465 | } else if (ChannelState.OPENCONFIRM == state) { |
| 466 | |
| 467 | // When ReadTimeout timer is expired in OPENCONFIRM state. |
| 468 | // TODO: Send Notification |
| 469 | channel.close(); |
| 470 | state = ChannelState.IDLE; |
| 471 | return; |
| 472 | } |
| 473 | } else if (e.getCause() instanceof ClosedChannelException) { |
| 474 | log.debug("Channel for bgp {} already closed", getPeerInfoString()); |
| 475 | } else if (e.getCause() instanceof IOException) { |
| 476 | log.error("Disconnecting peer {} due to IO Error: {}", getPeerInfoString(), e.getCause().getMessage()); |
| 477 | if (log.isDebugEnabled()) { |
| 478 | // still print stack trace if debug is enabled |
| 479 | log.debug("StackTrace for previous Exception: ", e.getCause()); |
| 480 | } |
| 481 | channel.close(); |
| 482 | } else if (e.getCause() instanceof BGPParseException) { |
| 483 | // TODO: SEND NOTIFICATION |
| 484 | log.debug("BGP Parse Exception: ", e.getCause()); |
| 485 | } else if (e.getCause() instanceof RejectedExecutionException) { |
| 486 | log.warn("Could not process message: queue full"); |
| 487 | } else { |
| 488 | log.error("Error while processing message from peer " + getPeerInfoString() + "state " + this.state); |
| 489 | channel.close(); |
| 490 | } |
| 491 | } |
| 492 | |
| 493 | @Override |
| 494 | public String toString() { |
| 495 | return getPeerInfoString(); |
| 496 | } |
| 497 | |
| 498 | @Override |
| 499 | public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) throws Exception { |
| 500 | if (e.getMessage() instanceof List) { |
| 501 | @SuppressWarnings("Unchecked") |
| 502 | List<BGPMessage> msglist = (List<BGPMessage>) e.getMessage(); |
| 503 | for (BGPMessage pm : msglist) { |
| 504 | // Do the actual packet processing |
| 505 | state.processBGPMessage(this, pm); |
| 506 | } |
| 507 | } else { |
| 508 | state.processBGPMessage(this, (BGPMessage) e.getMessage()); |
| 509 | } |
| 510 | } |
| 511 | |
| 512 | // ************************* |
| 513 | // Channel utility methods |
| 514 | // ************************* |
| 515 | /** |
| 516 | * Set handshake status. |
| 517 | * |
| 518 | * @param handshakeComplete handshake complete status |
| 519 | */ |
| 520 | public void setHandshakeComplete(boolean handshakeComplete) { |
| 521 | this.state.setHandshakeComplete(handshakeComplete); |
| 522 | } |
| 523 | |
| 524 | /** |
| 525 | * Is this a state in which the handshake has completed? |
| 526 | * |
| 527 | * @return true if the handshake is complete |
| 528 | */ |
| 529 | public boolean isHandshakeComplete() { |
| 530 | return state.isHandshakeComplete(); |
| 531 | } |
| 532 | |
| 533 | /** |
| 534 | * To handle the BGP message. |
| 535 | * |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 536 | * @param m bgp message |
| 537 | * @throws BGPParseException throw exception |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 538 | */ |
| 539 | private void dispatchMessage(BGPMessage m) throws BGPParseException { |
| 540 | bgpPacketStats.addInPacket(); |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 541 | bgpController.processBGPPacket(thisbgpId, m); |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 542 | } |
| 543 | |
| 544 | /** |
| 545 | * Return a string describing this peer based on the already available information (ip address and/or remote |
| 546 | * socket). |
| 547 | * |
| 548 | * @return display string |
| 549 | */ |
| 550 | private String getPeerInfoString() { |
| 551 | if (bgpPeer != null) { |
| 552 | return bgpPeer.toString(); |
| 553 | } |
| 554 | String channelString; |
| 555 | if (channel == null || channel.getRemoteAddress() == null) { |
| 556 | channelString = "?"; |
| 557 | } else { |
| 558 | channelString = channel.getRemoteAddress().toString(); |
| 559 | } |
| 560 | String bgpIpString; |
| 561 | // TODO: implement functionality to get bgp id string |
| 562 | bgpIpString = "?"; |
| 563 | return String.format("[%s BGP-IP[%s]]", channelString, bgpIpString); |
| 564 | } |
| 565 | |
| 566 | /** |
| 567 | * Update the channels state. Only called from the state machine. TODO: enforce restricted state transitions |
| 568 | * |
| 569 | * @param state |
| 570 | */ |
| 571 | private void setState(ChannelState state) { |
| 572 | this.state = state; |
| 573 | } |
| 574 | |
| 575 | /** |
| 576 | * get packet statistics. |
| 577 | * |
| 578 | * @return packet statistics |
| 579 | */ |
| 580 | public BGPPacketStatsImpl getBgpPacketStats() { |
| 581 | return bgpPacketStats; |
| 582 | } |
| 583 | |
| 584 | /** |
| 585 | * Send handshake open message to the peer. |
| 586 | * |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 587 | * @throws IOException, BGPParseException |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 588 | */ |
| 589 | private void sendHandshakeOpenMessage() throws IOException, BGPParseException { |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 590 | int bgpId; |
| 591 | |
| 592 | bgpId = Ip4Address.valueOf(bgpconfig.getRouterId()).toInt(); |
| 593 | BGPMessage msg = factory4.openMessageBuilder().setAsNumber((short) bgpconfig.getAsNumber()) |
| 594 | .setHoldTime(bgpconfig.getHoldTime()).setBgpId(bgpId).build(); |
| 595 | log.debug("Sending open message to {}", channel.getRemoteAddress()); |
| 596 | channel.write(Collections.singletonList(msg)); |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 597 | |
| 598 | } |
| 599 | |
| 600 | /** |
| 601 | * Send keep alive message. |
| 602 | * |
| 603 | * @throws IOException when channel is disconnected |
| 604 | * @throws BGPParseException while building keep alive message |
| 605 | */ |
| 606 | synchronized void sendKeepAliveMessage() throws IOException, BGPParseException { |
| 607 | |
Shashikanth VH | 9f8afb4 | 2015-11-04 18:00:30 +0530 | [diff] [blame] | 608 | BGPMessage msg = factory4.keepaliveMessageBuilder().build(); |
| 609 | log.debug("Sending keepalive message to {}", channel.getRemoteAddress()); |
| 610 | channel.write(Collections.singletonList(msg)); |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 611 | } |
| 612 | |
| 613 | /** |
| 614 | * Send notification and close channel with peer. |
| 615 | */ |
| 616 | private void sendErrNotificationAndCloseChannel() { |
| 617 | // TODO: send notification |
| 618 | channel.close(); |
| 619 | } |
| 620 | |
| 621 | /** |
| 622 | * Process unknown BGP message received. |
| 623 | * |
| 624 | * @throws BGPParseException when received invalid message |
| 625 | */ |
| 626 | public void processUnknownMsg() throws BGPParseException { |
| 627 | log.debug("UNKNOWN message received"); |
| 628 | Date now = null; |
| 629 | if (bgpPacketStats.wrongPacketCount() == 0) { |
| 630 | now = new Date(); |
| 631 | bgpPacketStats.setTime(now.getTime()); |
| 632 | bgpPacketStats.addWrongPacket(); |
| 633 | sendErrNotificationAndCloseChannel(); |
| 634 | } |
| 635 | if (bgpPacketStats.wrongPacketCount() > 1) { |
| 636 | Date lastest = new Date(); |
| 637 | bgpPacketStats.addWrongPacket(); |
| 638 | // converting to seconds |
| 639 | if (((lastest.getTime() - bgpPacketStats.getTime()) / 1000) > 60) { |
| 640 | now = lastest; |
| 641 | bgpPacketStats.setTime(now.getTime()); |
| 642 | bgpPacketStats.resetWrongPacket(); |
| 643 | bgpPacketStats.addWrongPacket(); |
| 644 | } else if (((int) (lastest.getTime() - now.getTime()) / 1000) < 60) { |
| 645 | if (MAX_WRONG_COUNT_PACKET <= bgpPacketStats.wrongPacketCount()) { |
| 646 | // reset once wrong packet count reaches MAX_WRONG_COUNT_PACKET |
| 647 | bgpPacketStats.resetWrongPacket(); |
| 648 | // max wrong packets received send error message and close the session |
| 649 | sendErrNotificationAndCloseChannel(); |
| 650 | } |
| 651 | } |
| 652 | } |
| 653 | } |
| 654 | |
| 655 | /** |
Vidyashree Rama | ee29325 | 2015-11-18 17:00:11 +0530 | [diff] [blame^] | 656 | * BGP open message validation. |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 657 | * |
| 658 | * @param h channel handler |
Vidyashree Rama | ee29325 | 2015-11-18 17:00:11 +0530 | [diff] [blame^] | 659 | * @param openMsg open message |
| 660 | * @return true if valid message, otherwise false |
| 661 | * @throws BGPParseException throw exception |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 662 | */ |
Vidyashree Rama | ee29325 | 2015-11-18 17:00:11 +0530 | [diff] [blame^] | 663 | public boolean openMsgValidation(BGPChannelHandler h, BGPOpenMsg openMsg) throws BGPParseException { |
| 664 | boolean result; |
| 665 | |
| 666 | // Validate BGP ID |
| 667 | result = bgpIdValidation(openMsg); |
| 668 | if (!result) { |
| 669 | throw new BGPParseException(BGPErrorType.OPEN_MESSAGE_ERROR, BGPErrorType.BAD_BGP_IDENTIFIER, null); |
| 670 | } |
| 671 | |
| 672 | // Validate AS number |
| 673 | result = asNumberValidation(h, openMsg); |
| 674 | if (!result) { |
| 675 | throw new BGPParseException(BGPErrorType.OPEN_MESSAGE_ERROR, BGPErrorType.BAD_PEER_AS, null); |
| 676 | } |
| 677 | |
| 678 | // Validate hold timer |
| 679 | if ((openMsg.getHoldTime() != 0) && (openMsg.getHoldTime() < BGP_MIN_HOLDTIME)) { |
| 680 | throw new BGPParseException(BGPErrorType.OPEN_MESSAGE_ERROR, BGPErrorType.UNACCEPTABLE_HOLD_TIME, null); |
| 681 | } |
| 682 | |
| 683 | // Validate capabilities |
| 684 | result = capabilityValidation(h, openMsg); |
| 685 | return result; |
| 686 | } |
| 687 | |
| 688 | /** |
| 689 | * Capability Validation. |
| 690 | * |
| 691 | * @param h channel handler |
| 692 | * @param openmsg open message |
| 693 | * @return success or failure |
| 694 | * @throws BGPParseException |
| 695 | */ |
| 696 | private boolean capabilityValidation(BGPChannelHandler h, BGPOpenMsg openmsg) throws BGPParseException { |
| 697 | log.debug("capabilityValidation"); |
| 698 | |
| 699 | boolean isMultiProtocolcapabilityExists = false; |
| 700 | boolean isFourOctetCapabilityExits = false; |
| 701 | int capAsNum = 0; |
| 702 | |
| 703 | List<BGPValueType> capabilityTlv = openmsg.getCapabilityTlv(); |
| 704 | ListIterator<BGPValueType> listIterator = capabilityTlv.listIterator(); |
| 705 | List<BGPValueType> unSupportedCapabilityTlv = new LinkedList<>(); |
| 706 | ListIterator<BGPValueType> unSupportedCaplistIterator = unSupportedCapabilityTlv.listIterator(); |
| 707 | BGPValueType tempTlv; |
| 708 | boolean isLargeAsCapabilityCfg = h.bgpconfig.getLargeASCapability(); |
| 709 | boolean isLsCapabilityCfg = h.bgpconfig.getLsCapability(); |
| 710 | |
| 711 | while (listIterator.hasNext()) { |
| 712 | BGPValueType tlv = listIterator.next(); |
| 713 | if (tlv.getType() == MULTI_PROTOCOL_EXTN_CAPA_TYPE) { |
| 714 | isMultiProtocolcapabilityExists = true; |
| 715 | } |
| 716 | if (tlv.getType() == FOUR_OCTET_AS_NUM_CAPA_TYPE) { |
| 717 | isFourOctetCapabilityExits = true; |
| 718 | capAsNum = ((FourOctetAsNumCapabilityTlv) tlv).getInt(); |
| 719 | } |
| 720 | } |
| 721 | |
| 722 | if (isFourOctetCapabilityExits) { |
| 723 | if (capAsNum > MAX_AS2_NUM) { |
| 724 | if (openmsg.getAsNumber() != AS_TRANS) { |
| 725 | throw new BGPParseException(BGPErrorType.OPEN_MESSAGE_ERROR, BGPErrorType.BAD_PEER_AS, null); |
| 726 | } |
| 727 | } else { |
| 728 | if (capAsNum != openmsg.getAsNumber()) { |
| 729 | throw new BGPParseException(BGPErrorType.OPEN_MESSAGE_ERROR, BGPErrorType.BAD_PEER_AS, null); |
| 730 | } |
| 731 | } |
| 732 | } |
| 733 | |
| 734 | if ((isLsCapabilityCfg)) { |
| 735 | if (!isMultiProtocolcapabilityExists) { |
| 736 | tempTlv = new MultiProtocolExtnCapabilityTlv(AFI, RES, SAFI); |
| 737 | unSupportedCapabilityTlv.add(tempTlv); |
| 738 | } |
| 739 | } |
| 740 | |
| 741 | if ((isLargeAsCapabilityCfg)) { |
| 742 | if (!isFourOctetCapabilityExits) { |
| 743 | tempTlv = new FourOctetAsNumCapabilityTlv(h.bgpconfig.getAsNumber()); |
| 744 | unSupportedCapabilityTlv.add(tempTlv); |
| 745 | } |
| 746 | } |
| 747 | |
| 748 | if (unSupportedCaplistIterator.hasNext()) { |
| 749 | ChannelBuffer buffer = ChannelBuffers.dynamicBuffer(); |
| 750 | while (unSupportedCaplistIterator.hasNext()) { |
| 751 | BGPValueType tlv = unSupportedCaplistIterator.next(); |
| 752 | tlv.write(buffer); |
| 753 | } |
| 754 | throw new BGPParseException(BGPErrorType.OPEN_MESSAGE_ERROR, |
| 755 | BGPErrorType.UNSUPPORTED_CAPABILITY, buffer); |
| 756 | } else { |
| 757 | return true; |
| 758 | } |
| 759 | } |
| 760 | |
| 761 | /** |
| 762 | * AS Number Validation. |
| 763 | * |
| 764 | * @param h channel Handler |
| 765 | * @param openMsg open message |
| 766 | * @return true or false |
| 767 | */ |
| 768 | private boolean asNumberValidation(BGPChannelHandler h, BGPOpenMsg openMsg) { |
| 769 | log.debug("AS Num validation"); |
| 770 | |
| 771 | int capAsNum = 0; |
| 772 | boolean isFourOctetCapabilityExits = false; |
| 773 | |
| 774 | BGPPeerCfg peerCfg = h.bgpconfig.displayPeers(peerAddr); |
| 775 | List<BGPValueType> capabilityTlv = openMsg.getCapabilityTlv(); |
| 776 | ListIterator<BGPValueType> listIterator = capabilityTlv.listIterator(); |
| 777 | |
| 778 | while (listIterator.hasNext()) { |
| 779 | BGPValueType tlv = listIterator.next(); |
| 780 | if (tlv.getType() == FOUR_OCTET_AS_NUM_CAPA_TYPE) { |
| 781 | isFourOctetCapabilityExits = true; |
| 782 | capAsNum = ((FourOctetAsNumCapabilityTlv) tlv).getInt(); |
| 783 | } |
| 784 | } |
| 785 | |
| 786 | if (peerCfg.getAsNumber() > MAX_AS2_NUM) { |
| 787 | if (openMsg.getAsNumber() != AS_TRANS) { |
| 788 | return false; |
| 789 | } |
| 790 | |
| 791 | if (!isFourOctetCapabilityExits) { |
| 792 | return false; |
| 793 | } |
| 794 | |
| 795 | if (peerCfg.getAsNumber() != capAsNum) { |
| 796 | return false; |
| 797 | } |
| 798 | |
| 799 | isIbgpSession = peerCfg.getIsIBgp(); |
| 800 | if (isIbgpSession) { |
| 801 | // IBGP - AS number should be same for Peer and local if it is IBGP |
| 802 | if (h.bgpconfig.getAsNumber() != capAsNum) { |
| 803 | return false; |
| 804 | } |
| 805 | } |
| 806 | } else { |
| 807 | |
| 808 | if (openMsg.getAsNumber() != peerCfg.getAsNumber()) { |
| 809 | return false; |
| 810 | } |
| 811 | |
| 812 | if (isFourOctetCapabilityExits) { |
| 813 | if (capAsNum != peerCfg.getAsNumber()) { |
| 814 | return false; |
| 815 | } |
| 816 | } |
| 817 | |
| 818 | isIbgpSession = peerCfg.getIsIBgp(); |
| 819 | if (isIbgpSession) { |
| 820 | // IBGP - AS number should be same for Peer and local if it is IBGP |
| 821 | if (openMsg.getAsNumber() != h.bgpconfig.getAsNumber()) { |
| 822 | return false; |
| 823 | } |
| 824 | } |
| 825 | } |
| 826 | return true; |
| 827 | } |
| 828 | |
| 829 | /** |
| 830 | * Validates BGP ID. |
| 831 | * |
| 832 | * @param openMsg open message |
| 833 | * @return true or false |
| 834 | */ |
| 835 | private boolean bgpIdValidation(BGPOpenMsg openMsg) { |
| 836 | String openMsgBgpId = Ip4Address.valueOf(openMsg.getBgpId()).toString(); |
| 837 | |
| 838 | InetAddress ipAddress; |
| 839 | try { |
| 840 | ipAddress = InetAddress.getByName(openMsgBgpId); |
| 841 | if (ipAddress.isMulticastAddress()) { |
| 842 | return false; |
| 843 | } |
| 844 | } catch (UnknownHostException e) { |
| 845 | log.debug("InetAddress convertion failed"); |
| 846 | } |
Shashikanth VH | 6de20d3 | 2015-10-09 12:04:13 +0530 | [diff] [blame] | 847 | return true; |
| 848 | } |
| 849 | } |