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/*
* 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 capability = sessionInfo.remoteBgpCapability();
ListIterator 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)) {
return true;
}
} else if (tlv.getType() == RpdCapabilityTlv.TYPE) {
RpdCapabilityTlv temp = (RpdCapabilityTlv) tlv;
if ((temp.getAfi() == afi) && (temp.getSafi() == sAfi)) {
return true;
}
}
}
}
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 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 aspathSet = new ArrayList<>();
List aspathSeq = new ArrayList<>();
aspathSeq.add((short) bgpController.getConfig().getAsNumber());
AsPath asPath = new AsPath(aspathSet, aspathSeq);
attributesList.add(asPath);
} else {
List aspathSet = new ArrayList<>();
List 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 pathAttr) throws BgpParseException {
ListIterator iterator = pathAttr.listIterator();
while (iterator.hasNext()) {
BgpValueType attr = iterator.next();
if (attr instanceof MpReachNlri) {
List nlri = ((MpReachNlri) attr).mpReachNlri();
callAdd(this, nlri, pathAttr);
}
if (attr instanceof MpUnReachNlri) {
List 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 nlri, List pathAttr)
throws BgpParseException {
ListIterator 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 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 nlri) throws BgpParseException {
ListIterator 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 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();
}
}
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