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Peer: Disconnect remote peers which repeatedly don't respond to pings.

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Premek 2019-03-11 11:34:43 +01:00 • committed by Andreas Schildbach
parent ce9801f7e3
commit 29f450b860
1 changed files with 6 additions and 0 deletions
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6
core/src/main/java/org/bitcoinj/core/Peer.java
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@ -149,6 +149,8 @@ public class Peer extends PeerSocketHandler {
private final ReentrantLock lastPingTimesLock = new ReentrantLock();
@GuardedBy("lastPingTimesLock") private long[] lastPingTimes = null;
private final CopyOnWriteArrayList<PendingPing> pendingPings;
// Disconnect from a peer that is not responding to Pings
private static final int PENDING_PINGS_LIMIT = 50;
private static final int PING_MOVING_AVERAGE_WINDOW = 20;
private volatile VersionMessage vPeerVersionMessage;
@ -1552,6 +1554,10 @@ public class Peer extends PeerSocketHandler {
final VersionMessage ver = vPeerVersionMessage;
if (!ver.isPingPongSupported())
throw new ProtocolException("Peer version is too low for measurable pings: " + ver);
if (pendingPings.size() > PENDING_PINGS_LIMIT) {
log.info("{}: Too many pending pings, disconnecting", this);
close();
}
PendingPing pendingPing = new PendingPing(nonce);
pendingPings.add(pendingPing);
sendMessage(new Ping(pendingPing.nonce));