package org.opendaylight.protocol.bgp.rib.impl;
-import com.google.common.base.CharMatcher;
-import com.google.common.base.Objects;
+import com.google.common.base.MoreObjects;
+import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
import com.google.common.collect.Maps;
+import com.google.common.net.InetAddresses;
+import com.google.common.primitives.UnsignedInts;
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
import java.net.Inet4Address;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
+import java.util.HashSet;
+import java.util.List;
import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
import javax.annotation.concurrent.GuardedBy;
import javax.annotation.concurrent.ThreadSafe;
+import org.opendaylight.protocol.bgp.parser.AsNumberUtil;
import org.opendaylight.protocol.bgp.parser.BGPDocumentedException;
import org.opendaylight.protocol.bgp.parser.BGPError;
+import org.opendaylight.protocol.bgp.parser.impl.message.open.As4CapabilityHandler;
import org.opendaylight.protocol.bgp.rib.impl.spi.BGPPeerRegistry;
import org.opendaylight.protocol.bgp.rib.impl.spi.BGPSessionPreferences;
-import org.opendaylight.protocol.bgp.rib.impl.spi.ReusableBGPPeer;
+import org.opendaylight.protocol.bgp.rib.impl.spi.PeerRegistryListener;
+import org.opendaylight.protocol.bgp.rib.impl.spi.PeerRegistrySessionListener;
import org.opendaylight.protocol.bgp.rib.spi.BGPSessionListener;
-import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.IpAddress;
-import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv4Address;
-import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv6Address;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.AsNumber;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IetfInetUtil;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Address;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.Open;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.open.message.BgpParameters;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.open.message.bgp.parameters.OptionalCapabilities;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.open.message.bgp.parameters.optional.capabilities.CParameters;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.open.message.bgp.parameters.optional.capabilities.CParametersBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.open.message.bgp.parameters.optional.capabilities.c.parameters.As4BytesCapability;
+import org.opendaylight.yangtools.concepts.AbstractRegistration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
private static final Logger LOG = LoggerFactory.getLogger(StrictBGPPeerRegistry.class);
- private static final CharMatcher NONDIGIT = CharMatcher.inRange('0', '9').negate();
-
// TODO remove backwards compatibility
public static final StrictBGPPeerRegistry GLOBAL = new StrictBGPPeerRegistry();
@GuardedBy("this")
- private final Map<IpAddress, ReusableBGPPeer> peers = Maps.newHashMap();
+ private final Map<IpAddress, BGPSessionListener> peers = Maps.newHashMap();
@GuardedBy("this")
private final Map<IpAddress, BGPSessionId> sessionIds = Maps.newHashMap();
@GuardedBy("this")
private final Map<IpAddress, BGPSessionPreferences> peerPreferences = Maps.newHashMap();
+ @GuardedBy("this")
+ private final Set<PeerRegistryListener> listeners = new HashSet<>();
+ @GuardedBy("this")
+ private final Set<PeerRegistrySessionListener> sessionListeners = new HashSet<>();
+
+ public static BGPPeerRegistry instance() {
+ return GLOBAL;
+ }
@Override
- public synchronized void addPeer(final IpAddress ip, final ReusableBGPPeer peer, final BGPSessionPreferences preferences) {
+ public synchronized void addPeer(final IpAddress ip, final BGPSessionListener peer, final BGPSessionPreferences preferences) {
Preconditions.checkNotNull(ip);
Preconditions.checkArgument(!this.peers.containsKey(ip), "Peer for %s already present", ip);
this.peers.put(ip, Preconditions.checkNotNull(peer));
- this.peerPreferences.put(ip, Preconditions.checkNotNull(preferences));
+ Preconditions.checkNotNull(preferences.getMyAs());
+ Preconditions.checkNotNull(preferences.getHoldTime());
+ Preconditions.checkNotNull(preferences.getParams());
+ Preconditions.checkNotNull(preferences.getBgpId());
+ this.peerPreferences.put(ip, preferences);
+ for (final PeerRegistryListener peerRegistryListener : this.listeners) {
+ peerRegistryListener.onPeerAdded(ip, preferences);
+ }
}
@Override
public synchronized void removePeer(final IpAddress ip) {
Preconditions.checkNotNull(ip);
this.peers.remove(ip);
+ for (final PeerRegistryListener peerRegistryListener : this.listeners) {
+ peerRegistryListener.onPeerRemoved(ip);
+ }
}
+ @Override
public synchronized void removePeerSession(final IpAddress ip) {
Preconditions.checkNotNull(ip);
this.sessionIds.remove(ip);
+ for (final PeerRegistrySessionListener peerRegistrySessionListener : this.sessionListeners) {
+ peerRegistrySessionListener.onSessionRemoved(ip);
+ }
}
@Override
}
@Override
- public synchronized BGPSessionListener getPeer(final IpAddress ip,
- final Ipv4Address sourceId, final Ipv4Address remoteId)
- throws BGPDocumentedException {
+ public synchronized BGPSessionListener getPeer(final IpAddress ip, final Ipv4Address sourceId,
+ final Ipv4Address remoteId, final Open openObj) throws BGPDocumentedException {
Preconditions.checkNotNull(ip);
Preconditions.checkNotNull(sourceId);
Preconditions.checkNotNull(remoteId);
+ final AsNumber remoteAsNumber = AsNumberUtil.advertizedAsNumber(openObj);
+ Preconditions.checkNotNull(remoteAsNumber);
+
+ final BGPSessionPreferences prefs = getPeerPreferences(ip);
checkPeerConfigured(ip);
- final BGPSessionId currentConnection = new BGPSessionId(sourceId, remoteId);
+ final BGPSessionId currentConnection = new BGPSessionId(sourceId, remoteId, remoteAsNumber);
+ final BGPSessionListener p = this.peers.get(ip);
- if (this.sessionIds.containsKey(ip)) {
- LOG.warn("Duplicate BGP session established with {}", ip);
+ final BGPSessionId previousConnection = this.sessionIds.get(ip);
+
+ if (previousConnection != null) {
- final BGPSessionId previousConnection = this.sessionIds.get(ip);
+ LOG.warn("Duplicate BGP session established with {}", ip);
// Session reestablished with different ids
if (!previousConnection.equals(currentConnection)) {
throw new BGPDocumentedException(
String.format("BGP session with %s %s has to be dropped. Same session already present %s",
ip, currentConnection, previousConnection),
- BGPError.CONNECTION_COLLISION_RESOLUTION);
+ BGPError.CEASE);
// Session reestablished with lower source bgp id, dropping current
} else if (previousConnection.isHigherDirection(currentConnection)) {
throw new BGPDocumentedException(
String.format("BGP session with %s initiated %s has to be dropped. Opposite session already present",
ip, currentConnection),
- BGPError.CONNECTION_COLLISION_RESOLUTION);
+ BGPError.CEASE);
// Session reestablished with higher source bgp id, dropping previous
} else if (currentConnection.isHigherDirection(previousConnection)) {
this.peers.get(ip).releaseConnection();
return this.peers.get(ip);
- // Session reestablished with same source bgp id, dropping current as duplicate
+ } else if (previousConnection.hasHigherAsNumber(currentConnection)) {
+ LOG.warn("BGP session with {} {} has to be dropped. Opposite session already present", ip, currentConnection);
+ throw new BGPDocumentedException(
+ String.format("BGP session with %s initiated %s has to be dropped. Opposite session already present",
+ ip, currentConnection),
+ BGPError.CEASE);
+ } else if (currentConnection.hasHigherAsNumber(previousConnection)) {
+ LOG.warn("BGP session with {} {} released. Replaced by opposite session", ip, previousConnection);
+ this.peers.get(ip).releaseConnection();
+ return this.peers.get(ip);
+ // Session reestablished with same source bgp id, dropping current as duplicate
} else {
LOG.warn("BGP session with %s initiated from %s to %s has to be dropped. Same session already present", ip, sourceId, remoteId);
throw new BGPDocumentedException(
String.format("BGP session with %s initiated %s has to be dropped. Same session already present",
ip, currentConnection),
- BGPError.CONNECTION_COLLISION_RESOLUTION);
+ BGPError.CEASE);
}
}
+ validateAs(remoteAsNumber, openObj, prefs);
// Map session id to peer IP address
this.sessionIds.put(ip, currentConnection);
- return this.peers.get(ip);
+ for (final PeerRegistrySessionListener peerRegistrySessionListener : this.sessionListeners) {
+ peerRegistrySessionListener.onSessionCreated(ip);
+ }
+ return p;
+ }
+
+ private static void validateAs(final AsNumber remoteAs, final Open openObj, final BGPSessionPreferences localPref) throws BGPDocumentedException {
+ if (!remoteAs.equals(localPref.getExpectedRemoteAs())) {
+ LOG.warn("Unexpected remote AS number. Expecting {}, got {}", remoteAs, localPref.getExpectedRemoteAs());
+ throw new BGPDocumentedException("Peer AS number mismatch", BGPError.BAD_PEER_AS);
+ }
+
+ // https://tools.ietf.org/html/rfc6286#section-2.2
+ if (openObj.getBgpIdentifier() != null && openObj.getBgpIdentifier().getValue().equals(localPref.getBgpId().getValue())) {
+ LOG.warn("Remote and local BGP Identifiers are the same: {}", openObj.getBgpIdentifier());
+ throw new BGPDocumentedException("Remote and local BGP Identifiers are the same.", BGPError.BAD_BGP_ID);
+ }
+ final List<BgpParameters> prefs = openObj.getBgpParameters();
+ if (prefs != null) {
+ if (getAs4BytesCapability(localPref.getParams()).isPresent() && !getAs4BytesCapability(prefs).isPresent()) {
+ throw new BGPDocumentedException("The peer must advertise AS4Bytes capability.", BGPError.UNSUPPORTED_CAPABILITY, serializeAs4BytesCapability(getAs4BytesCapability(localPref.getParams()).get()));
+ }
+ if (!prefs.containsAll(localPref.getParams())) {
+ LOG.info("BGP Open message session parameters differ, session still accepted.");
+ }
+ } else {
+ throw new BGPDocumentedException("Open message unacceptable. Check the configuration of BGP speaker.", BGPError.UNSPECIFIC_OPEN_ERROR);
+ }
+ }
+
+ private static Optional<As4BytesCapability> getAs4BytesCapability(final List<BgpParameters> prefs) {
+ for (final BgpParameters param : prefs) {
+ for (final OptionalCapabilities capa : param.getOptionalCapabilities()) {
+ final CParameters cParam = capa.getCParameters();
+ if (cParam.getAs4BytesCapability() != null) {
+ return Optional.of(cParam.getAs4BytesCapability());
+ }
+ }
+ }
+ return Optional.absent();
+ }
+
+ private static byte[] serializeAs4BytesCapability(final As4BytesCapability as4Capability) {
+ final ByteBuf buffer = Unpooled.buffer(1 /*CODE*/ + 1 /*LENGTH*/ + Integer.SIZE / Byte.SIZE /*4 byte value*/);
+ final As4CapabilityHandler serializer = new As4CapabilityHandler();
+ serializer.serializeCapability(new CParametersBuilder().setAs4BytesCapability(as4Capability).build(), buffer);
+ return buffer.array();
}
@Override
}
/**
- * Create IpAddress from SocketAddress. Only InetSocketAddress is accepted with inner address: Inet4Address and Inet6Address.
+ * Creates IpAddress from SocketAddress. Only InetSocketAddress is accepted with inner address: Inet4Address and Inet6Address.
*
- * @throws IllegalArgumentException if submitted socket address is not InetSocketAddress[ipv4 | ipv6]
* @param socketAddress socket address to transform
+ * @return IpAddress equivalent to given socket address
+ * @throws IllegalArgumentException if submitted socket address is not InetSocketAddress[ipv4 | ipv6]
*/
public static IpAddress getIpAddress(final SocketAddress socketAddress) {
Preconditions.checkNotNull(socketAddress);
Preconditions.checkArgument(socketAddress instanceof InetSocketAddress, "Expecting InetSocketAddress but was %s", socketAddress.getClass());
final InetAddress inetAddress = ((InetSocketAddress) socketAddress).getAddress();
- if(inetAddress instanceof Inet4Address) {
- return new IpAddress(new Ipv4Address(inetAddress.getHostAddress()));
- } else if(inetAddress instanceof Inet6Address) {
- return new IpAddress(new Ipv6Address(inetAddress.getHostAddress()));
- }
-
- throw new IllegalArgumentException("Expecting " + Inet4Address.class + " or " + Inet6Address.class + " but was " + inetAddress.getClass());
+ Preconditions.checkArgument(inetAddress instanceof Inet4Address || inetAddress instanceof Inet6Address, "Expecting %s or %s but was %s", Inet4Address.class, Inet6Address.class, inetAddress.getClass());
+ return IetfInetUtil.INSTANCE.ipAddressFor(inetAddress);
}
@Override
@Override
public String toString() {
- return Objects.toStringHelper(this)
+ return MoreObjects.toStringHelper(this)
.add("peers", this.peers.keySet())
.toString();
}
/**
- * Session identifier that contains (source Bgp Id) -> (destination Bgp Id)
+ * Session identifier that contains (source Bgp Id) -> (destination Bgp Id) AsNumber is the remoteAs coming from
+ * remote Open message
*/
private static final class BGPSessionId {
+
private final Ipv4Address from, to;
+ private final AsNumber asNumber;
- BGPSessionId(final Ipv4Address from, final Ipv4Address to) {
+ BGPSessionId(final Ipv4Address from, final Ipv4Address to, final AsNumber asNumber) {
this.from = Preconditions.checkNotNull(from);
this.to = Preconditions.checkNotNull(to);
+ this.asNumber = Preconditions.checkNotNull(asNumber);
}
/**
* Check if this connection is equal to other and if it contains higher source bgp id
*/
boolean isHigherDirection(final BGPSessionId other) {
- Preconditions.checkState(!this.isSameDirection(other), "Equal sessions with same direction");
return toLong(this.from) > toLong(other.from);
}
- private long toLong(final Ipv4Address from) {
- return Long.parseLong(NONDIGIT.removeFrom(from.getValue()));
+ boolean hasHigherAsNumber(final BGPSessionId other) {
+ return this.asNumber.getValue() > other.asNumber.getValue();
}
- /**
- * Check if 2 connections are equal and face same direction
- */
- boolean isSameDirection(final BGPSessionId other) {
- Preconditions.checkState(this.equals(other), "Only equal sessions can be compared");
- return this.from.equals(other.from);
+ private static long toLong(final Ipv4Address from) {
+ final int i = InetAddresses.coerceToInteger(InetAddresses.forString(from.getValue()));
+ return UnsignedInts.toLong(i);
}
@Override
public String toString() {
- return Objects.toStringHelper(this)
+ return MoreObjects.toStringHelper(this)
.add("from", this.from)
.add("to", this.to)
.toString();
}
}
+
+ @Override
+ public synchronized AutoCloseable registerPeerRegisterListener(final PeerRegistryListener listener) {
+ this.listeners.add(listener);
+ for (final Entry<IpAddress, BGPSessionPreferences> entry : this.peerPreferences.entrySet()) {
+ listener.onPeerAdded(entry.getKey(), entry.getValue());
+ }
+ return new AbstractRegistration() {
+ @Override
+ protected void removeRegistration() {
+ synchronized (StrictBGPPeerRegistry.this) {
+ StrictBGPPeerRegistry.this.listeners.remove(listener);
+ }
+ }
+ };
+ }
+
+ @Override
+ public synchronized AutoCloseable registerPeerSessionListener(final PeerRegistrySessionListener listener) {
+ this.sessionListeners.add(listener);
+ for (final IpAddress ipAddress : this.sessionIds.keySet()) {
+ listener.onSessionCreated(ipAddress);
+ }
+ return new AbstractRegistration() {
+ @Override
+ protected void removeRegistration() {
+ synchronized (StrictBGPPeerRegistry.this) {
+ StrictBGPPeerRegistry.this.sessionListeners.remove(listener);
+ }
+ }
+ };
+ }
}
Code Review / bgpcep.git / blobdiff