| /* |
| * Copyright 2015-present 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.bgp.controller.impl; |
| |
| import com.google.common.base.MoreObjects; |
| import com.google.common.base.Preconditions; |
| |
| import org.jboss.netty.channel.Channel; |
| import org.onlab.packet.IpAddress; |
| import org.onosproject.bgp.controller.BgpController; |
| import org.onosproject.bgp.controller.BgpLocalRib; |
| import org.onosproject.bgp.controller.BgpPeer; |
| import org.onosproject.bgp.controller.BgpSessionInfo; |
| import org.onosproject.bgpio.exceptions.BgpParseException; |
| import org.onosproject.bgpio.protocol.BgpFactories; |
| import org.onosproject.bgpio.protocol.BgpFactory; |
| import org.onosproject.bgpio.protocol.BgpLSNlri; |
| import org.onosproject.bgpio.protocol.BgpMessage; |
| import org.onosproject.bgpio.protocol.flowspec.BgpFlowSpecNlri; |
| import org.onosproject.bgpio.protocol.flowspec.BgpFlowSpecRouteKey; |
| import org.onosproject.bgpio.protocol.linkstate.BgpLinkLsNlriVer4; |
| import org.onosproject.bgpio.protocol.linkstate.BgpNodeLSNlriVer4; |
| import org.onosproject.bgpio.protocol.linkstate.BgpPrefixIPv4LSNlriVer4; |
| import org.onosproject.bgpio.protocol.linkstate.PathAttrNlriDetails; |
| import org.onosproject.bgpio.types.AsPath; |
| import org.onosproject.bgpio.types.As4Path; |
| import org.onosproject.bgpio.types.BgpExtendedCommunity; |
| import org.onosproject.bgpio.types.BgpValueType; |
| import org.onosproject.bgpio.types.LocalPref; |
| import org.onosproject.bgpio.types.Med; |
| import org.onosproject.bgpio.types.MpReachNlri; |
| import org.onosproject.bgpio.types.MpUnReachNlri; |
| import org.onosproject.bgpio.types.MultiProtocolExtnCapabilityTlv; |
| import org.onosproject.bgpio.types.Origin; |
| import org.onosproject.bgpio.types.attr.WideCommunity; |
| import org.onosproject.bgpio.types.RpdCapabilityTlv; |
| import org.onosproject.bgpio.util.Constants; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.net.InetSocketAddress; |
| import java.net.SocketAddress; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.ListIterator; |
| import java.util.concurrent.RejectedExecutionException; |
| |
| /** |
| * BGPPeerImpl implements BGPPeer, maintains peer information and store updates in RIB . |
| */ |
| public class BgpPeerImpl implements BgpPeer { |
| |
| protected final Logger log = LoggerFactory.getLogger(BgpPeerImpl.class); |
| |
| private static final String SHUTDOWN_MSG = "Worker has already been shutdown"; |
| |
| private BgpController bgpController; |
| private Channel channel; |
| protected String channelId; |
| private boolean connected; |
| protected boolean isHandShakeComplete = false; |
| private BgpSessionInfo sessionInfo; |
| private BgpPacketStatsImpl pktStats; |
| private BgpLocalRib bgplocalRib; |
| private BgpLocalRib bgplocalRibVpn; |
| private AdjRibIn adjRib; |
| private VpnAdjRibIn vpnAdjRib; |
| |
| /** |
| * Return the adjacency RIB-IN. |
| * |
| * @return adjRib the adjacency RIB-IN |
| */ |
| public AdjRibIn adjacencyRib() { |
| return adjRib; |
| } |
| |
| /** |
| * Return the adjacency RIB-IN with VPN. |
| * |
| * @return vpnAdjRib the adjacency RIB-IN with VPN |
| */ |
| public VpnAdjRibIn vpnAdjacencyRib() { |
| return vpnAdjRib; |
| } |
| |
| @Override |
| public BgpSessionInfo sessionInfo() { |
| return sessionInfo; |
| } |
| |
| /** |
| * Initialize peer. |
| * |
| *@param bgpController controller instance |
| *@param sessionInfo bgp session info |
| *@param pktStats packet statistics |
| */ |
| public BgpPeerImpl(BgpController bgpController, BgpSessionInfo sessionInfo, BgpPacketStatsImpl pktStats) { |
| this.bgpController = bgpController; |
| this.sessionInfo = sessionInfo; |
| this.pktStats = pktStats; |
| this.bgplocalRib = bgpController.bgpLocalRib(); |
| this.bgplocalRibVpn = bgpController.bgpLocalRibVpn(); |
| this.adjRib = new AdjRibIn(); |
| this.vpnAdjRib = new VpnAdjRibIn(); |
| } |
| |
| /** |
| * Check if peer support capability. |
| * |
| * @param type capability type |
| * @param afi address family identifier |
| * @param sAfi subsequent address family identifier |
| * @return true if capability is supported, otherwise false |
| */ |
| public final boolean isCapabilitySupported(short type, short afi, byte sAfi) { |
| |
| List<BgpValueType> capability = sessionInfo.remoteBgpCapability(); |
| ListIterator<BgpValueType> listIterator = capability.listIterator(); |
| |
| while (listIterator.hasNext()) { |
| BgpValueType tlv = listIterator.next(); |
| |
| if (tlv.getType() == type) { |
| if (tlv.getType() == MultiProtocolExtnCapabilityTlv.TYPE) { |
| MultiProtocolExtnCapabilityTlv temp = (MultiProtocolExtnCapabilityTlv) tlv; |
| if ((temp.getAfi() == afi) && (temp.getSafi() == sAfi)) { |
| log.debug("Multi prorotcol extension capabality TLV is true"); |
| return true; |
| |
| } |
| } else if (tlv.getType() == RpdCapabilityTlv.TYPE) { |
| RpdCapabilityTlv temp = (RpdCapabilityTlv) tlv; |
| if ((temp.getAfi() == afi) && (temp.getSafi() == sAfi)) { |
| log.debug("RPD capabality TLV is true"); |
| return true; |
| } |
| } |
| } |
| } |
| log.debug("IS capabality is not supported "); |
| return false; |
| } |
| |
| /** |
| * Send flow specification update message to peer. |
| * |
| * @param operType operation type |
| * @param routeKey flow rule key |
| * @param flowSpec flow specification details |
| * @param wideCommunity for route policy |
| */ |
| public final void sendFlowSpecUpdateMessageToPeer(FlowSpecOperation operType, BgpFlowSpecRouteKey routeKey, |
| BgpFlowSpecNlri flowSpec, WideCommunity wideCommunity) { |
| |
| List<BgpValueType> attributesList = new LinkedList<>(); |
| byte sessionType = sessionInfo.isIbgpSession() ? (byte) 0 : (byte) 1; |
| byte sAfi = Constants.SAFI_FLOWSPEC_VALUE; |
| |
| boolean isFsCapabilitySet = isCapabilitySupported(MultiProtocolExtnCapabilityTlv.TYPE, |
| Constants.AFI_FLOWSPEC_VALUE, |
| Constants.SAFI_FLOWSPEC_VALUE); |
| |
| boolean isVpnFsCapabilitySet = isCapabilitySupported(MultiProtocolExtnCapabilityTlv.TYPE, |
| Constants.AFI_FLOWSPEC_VALUE, |
| Constants.VPN_SAFI_FLOWSPEC_VALUE); |
| |
| boolean isRpdCapabilitySet = isCapabilitySupported(RpdCapabilityTlv.TYPE, |
| Constants.AFI_FLOWSPEC_RPD_VALUE, |
| Constants.SAFI_FLOWSPEC_RPD_VALUE); |
| |
| boolean isVpnRpdCapabilitySet = isCapabilitySupported(RpdCapabilityTlv.TYPE, |
| Constants.AFI_FLOWSPEC_RPD_VALUE, |
| Constants.VPN_SAFI_FLOWSPEC_RDP_VALUE); |
| |
| if ((!isFsCapabilitySet) && (!isVpnFsCapabilitySet) && (!isRpdCapabilitySet) && (!isVpnRpdCapabilitySet)) { |
| log.debug("Peer do not support BGP flow spec capability", channel.getRemoteAddress()); |
| return; |
| } |
| |
| if (isVpnFsCapabilitySet) { |
| sAfi = Constants.VPN_SAFI_FLOWSPEC_VALUE; |
| } else if (isVpnRpdCapabilitySet) { |
| sAfi = Constants.VPN_SAFI_FLOWSPEC_RDP_VALUE; |
| } |
| attributesList.add(new Origin((byte) 0)); |
| |
| if (sessionType != 0) { |
| // EBGP |
| if (!bgpController.getConfig().getLargeASCapability()) { |
| List<Short> aspathSet = new ArrayList<>(); |
| List<Short> aspathSeq = new ArrayList<>(); |
| aspathSeq.add((short) bgpController.getConfig().getAsNumber()); |
| |
| AsPath asPath = new AsPath(aspathSet, aspathSeq); |
| attributesList.add(asPath); |
| } else { |
| List<Integer> aspathSet = new ArrayList<>(); |
| List<Integer> aspathSeq = new ArrayList<>(); |
| aspathSeq.add(bgpController.getConfig().getAsNumber()); |
| |
| As4Path as4Path = new As4Path(aspathSet, aspathSeq); |
| attributesList.add(as4Path); |
| } |
| attributesList.add(new Med(0)); |
| } else { |
| attributesList.add(new AsPath()); |
| attributesList.add(new Med(0)); |
| attributesList.add(new LocalPref(100)); |
| } |
| |
| attributesList.add(new BgpExtendedCommunity(flowSpec.fsActionTlv())); |
| if (wideCommunity != null) { |
| attributesList.add(wideCommunity); |
| } |
| |
| if (operType == FlowSpecOperation.ADD) { |
| attributesList.add(new MpReachNlri(flowSpec, Constants.AFI_FLOWSPEC_VALUE, sAfi)); |
| } else if (operType == FlowSpecOperation.DELETE) { |
| attributesList.add(new MpUnReachNlri(flowSpec, Constants.AFI_FLOWSPEC_VALUE, sAfi)); |
| } |
| |
| BgpMessage msg = Controller.getBgpMessageFactory4().updateMessageBuilder() |
| .setBgpPathAttributes(attributesList).build(); |
| |
| log.debug("Sending flow spec update message to {}", channel.getRemoteAddress()); |
| channel.write(Collections.singletonList(msg)); |
| } |
| |
| @Override |
| public void updateFlowSpec(FlowSpecOperation operType, BgpFlowSpecRouteKey routeKey, |
| BgpFlowSpecNlri flowSpec, WideCommunity wideCommunity) { |
| Preconditions.checkNotNull(operType, "flow specification operation type cannot be null"); |
| Preconditions.checkNotNull(routeKey, "flow specification prefix cannot be null"); |
| Preconditions.checkNotNull(flowSpec, "flow specification details cannot be null"); |
| Preconditions.checkNotNull(flowSpec.fsActionTlv(), "flow specification action cannot be null"); |
| |
| sendFlowSpecUpdateMessageToPeer(operType, routeKey, flowSpec, wideCommunity); |
| } |
| |
| @Override |
| public void buildAdjRibIn(List<BgpValueType> pathAttr) throws BgpParseException { |
| ListIterator<BgpValueType> iterator = pathAttr.listIterator(); |
| while (iterator.hasNext()) { |
| BgpValueType attr = iterator.next(); |
| if (attr instanceof MpReachNlri) { |
| List<BgpLSNlri> nlri = ((MpReachNlri) attr).mpReachNlri(); |
| callAdd(this, nlri, pathAttr); |
| } |
| if (attr instanceof MpUnReachNlri) { |
| List<BgpLSNlri> nlri = ((MpUnReachNlri) attr).mpUnReachNlri(); |
| callRemove(this, nlri); |
| } |
| } |
| } |
| |
| /** |
| * Updates NLRI identifier node in a tree separately based on afi and safi. |
| * |
| * @param peerImpl BGP peer instance |
| * @param nlri MpReachNlri path attribute |
| * @param pathAttr list of BGP path attributes |
| * @throws BgpParseException throws exception |
| */ |
| public void callAdd(BgpPeerImpl peerImpl, List<BgpLSNlri> nlri, List<BgpValueType> pathAttr) |
| throws BgpParseException { |
| ListIterator<BgpLSNlri> listIterator = nlri.listIterator(); |
| while (listIterator.hasNext()) { |
| BgpLSNlri nlriInfo = listIterator.next(); |
| if (nlriInfo instanceof BgpNodeLSNlriVer4) { |
| PathAttrNlriDetails details = setPathAttrDetails(nlriInfo, pathAttr); |
| if (!((BgpNodeLSNlriVer4) nlriInfo).isVpnPresent()) { |
| adjRib.add(nlriInfo, details); |
| bgplocalRib.add(sessionInfo(), nlriInfo, details); |
| } else { |
| vpnAdjRib.addVpn(nlriInfo, details, ((BgpNodeLSNlriVer4) nlriInfo).getRouteDistinguisher()); |
| bgplocalRibVpn.add(sessionInfo(), nlriInfo, details, |
| ((BgpNodeLSNlriVer4) nlriInfo).getRouteDistinguisher()); |
| } |
| } else if (nlriInfo instanceof BgpLinkLsNlriVer4) { |
| PathAttrNlriDetails details = setPathAttrDetails(nlriInfo, pathAttr); |
| if (!((BgpLinkLsNlriVer4) nlriInfo).isVpnPresent()) { |
| adjRib.add(nlriInfo, details); |
| bgplocalRib.add(sessionInfo(), nlriInfo, details); |
| } else { |
| vpnAdjRib.addVpn(nlriInfo, details, ((BgpLinkLsNlriVer4) nlriInfo).getRouteDistinguisher()); |
| bgplocalRibVpn.add(sessionInfo(), nlriInfo, details, |
| ((BgpLinkLsNlriVer4) nlriInfo).getRouteDistinguisher()); |
| } |
| } else if (nlriInfo instanceof BgpPrefixIPv4LSNlriVer4) { |
| PathAttrNlriDetails details = setPathAttrDetails(nlriInfo, pathAttr); |
| if (!((BgpPrefixIPv4LSNlriVer4) nlriInfo).isVpnPresent()) { |
| adjRib.add(nlriInfo, details); |
| bgplocalRib.add(sessionInfo(), nlriInfo, details); |
| } else { |
| vpnAdjRib.addVpn(nlriInfo, details, ((BgpPrefixIPv4LSNlriVer4) nlriInfo).getRouteDistinguisher()); |
| bgplocalRibVpn.add(sessionInfo(), nlriInfo, details, |
| ((BgpPrefixIPv4LSNlriVer4) nlriInfo).getRouteDistinguisher()); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Sets BGP path attribute and NLRI details. |
| * |
| * @param nlriInfo MpReachNlri path attribute |
| * @param pathAttr list of BGP path attributes |
| * @return details object of PathAttrNlriDetails |
| * @throws BgpParseException throw exception |
| */ |
| public PathAttrNlriDetails setPathAttrDetails(BgpLSNlri nlriInfo, List<BgpValueType> pathAttr) |
| throws BgpParseException { |
| PathAttrNlriDetails details = new PathAttrNlriDetails(); |
| details.setProtocolID(nlriInfo.getProtocolId()); |
| details.setIdentifier(nlriInfo.getIdentifier()); |
| details.setPathAttribute(pathAttr); |
| return details; |
| } |
| |
| /** |
| * Removes NLRI identifier node in a tree separately based on afi and safi. |
| * |
| * @param peerImpl BGP peer instance |
| * @param nlri NLRI information |
| * @throws BgpParseException BGP parse exception |
| */ |
| public void callRemove(BgpPeerImpl peerImpl, List<BgpLSNlri> nlri) throws BgpParseException { |
| ListIterator<BgpLSNlri> listIterator = nlri.listIterator(); |
| while (listIterator.hasNext()) { |
| BgpLSNlri nlriInfo = listIterator.next(); |
| if (nlriInfo instanceof BgpNodeLSNlriVer4) { |
| if (!((BgpNodeLSNlriVer4) nlriInfo).isVpnPresent()) { |
| adjRib.remove(nlriInfo); |
| bgplocalRib.delete(nlriInfo); |
| } else { |
| vpnAdjRib.removeVpn(nlriInfo, ((BgpNodeLSNlriVer4) nlriInfo).getRouteDistinguisher()); |
| bgplocalRibVpn.delete(nlriInfo, ((BgpNodeLSNlriVer4) nlriInfo).getRouteDistinguisher()); |
| } |
| } else if (nlriInfo instanceof BgpLinkLsNlriVer4) { |
| if (!((BgpLinkLsNlriVer4) nlriInfo).isVpnPresent()) { |
| adjRib.remove(nlriInfo); |
| bgplocalRib.delete(nlriInfo); |
| } else { |
| vpnAdjRib.removeVpn(nlriInfo, ((BgpLinkLsNlriVer4) nlriInfo).getRouteDistinguisher()); |
| bgplocalRibVpn.delete(nlriInfo, ((BgpLinkLsNlriVer4) nlriInfo).getRouteDistinguisher()); |
| } |
| } else if (nlriInfo instanceof BgpPrefixIPv4LSNlriVer4) { |
| if (!((BgpPrefixIPv4LSNlriVer4) nlriInfo).isVpnPresent()) { |
| adjRib.remove(nlriInfo); |
| bgplocalRib.delete(nlriInfo); |
| } else { |
| vpnAdjRib.removeVpn(nlriInfo, ((BgpPrefixIPv4LSNlriVer4) nlriInfo).getRouteDistinguisher()); |
| bgplocalRibVpn.delete(nlriInfo, ((BgpPrefixIPv4LSNlriVer4) nlriInfo).getRouteDistinguisher()); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Return the adjacency RIB-IN. |
| * |
| * @return adjRib the adjacency RIB-IN |
| */ |
| public AdjRibIn adjRib() { |
| return adjRib; |
| } |
| |
| /** |
| * Return the adjacency RIB-IN with VPN. |
| * |
| * @return vpnAdjRib the adjacency RIB-IN with VPN |
| */ |
| public VpnAdjRibIn vpnAdjRib() { |
| return vpnAdjRib; |
| } |
| |
| /** |
| * Update localRIB on peer disconnect. |
| * |
| * @throws BgpParseException while updating local RIB |
| */ |
| public void updateLocalRibOnPeerDisconnect() throws BgpParseException { |
| BgpLocalRibImpl localRib = (BgpLocalRibImpl) bgplocalRib; |
| BgpLocalRibImpl localRibVpn = (BgpLocalRibImpl) bgplocalRibVpn; |
| |
| localRib.localRibUpdate(adjacencyRib()); |
| localRibVpn.localRibUpdate(vpnAdjacencyRib()); |
| } |
| |
| // ************************ |
| // Channel related |
| // ************************ |
| |
| @Override |
| public final void disconnectPeer() { |
| this.channel.close(); |
| } |
| |
| @Override |
| public final void sendMessage(BgpMessage m) { |
| log.debug("Sending message to {}", channel.getRemoteAddress()); |
| try { |
| channel.write(Collections.singletonList(m)); |
| this.pktStats.addOutPacket(); |
| } catch (RejectedExecutionException e) { |
| log.warn(e.getMessage()); |
| if (!e.getMessage().contains(SHUTDOWN_MSG)) { |
| throw e; |
| } |
| } |
| } |
| |
| @Override |
| public final void sendMessage(List<BgpMessage> msgs) { |
| try { |
| channel.write(msgs); |
| this.pktStats.addOutPacket(msgs.size()); |
| } catch (RejectedExecutionException e) { |
| log.warn(e.getMessage()); |
| if (!e.getMessage().contains(SHUTDOWN_MSG)) { |
| throw e; |
| } |
| } |
| } |
| |
| @Override |
| public final boolean isConnected() { |
| return this.connected; |
| } |
| |
| @Override |
| public final void setConnected(boolean connected) { |
| this.connected = connected; |
| } |
| |
| @Override |
| public final void setChannel(Channel channel) { |
| this.channel = channel; |
| final SocketAddress address = channel.getRemoteAddress(); |
| if (address instanceof InetSocketAddress) { |
| final InetSocketAddress inetAddress = (InetSocketAddress) address; |
| final IpAddress ipAddress = IpAddress.valueOf(inetAddress.getAddress()); |
| if (ipAddress.isIp4()) { |
| channelId = ipAddress.toString() + ':' + inetAddress.getPort(); |
| } else { |
| channelId = '[' + ipAddress.toString() + "]:" + inetAddress.getPort(); |
| } |
| } |
| } |
| |
| @Override |
| public final Channel getChannel() { |
| return this.channel; |
| } |
| |
| @Override |
| public String channelId() { |
| return channelId; |
| } |
| |
| @Override |
| public BgpFactory factory() { |
| return BgpFactories.getFactory(sessionInfo.remoteBgpVersion()); |
| } |
| |
| @Override |
| public boolean isHandshakeComplete() { |
| return isHandShakeComplete; |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper(getClass()).omitNullValues() |
| .add("channel", channelId()) |
| .add("BgpId", sessionInfo().remoteBgpId()).toString(); |
| } |
| } |