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fix Handshake already has been started. #198

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fix Handshake already has been started. #198

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10 changes: 8 additions & 2 deletions src/main/java/tlschannel/impl/TlsChannelImpl.java
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Original file line number Diff line number Diff line change
Expand Up @@ -103,6 +103,9 @@ public TlsChannelImpl(
private final Lock readLock = new ReentrantLock();
private final Lock writeLock = new ReentrantLock();

/** Whether the handshake was already started once. */
private boolean handWasTouched;

private volatile boolean negotiated = false;

/**
Expand Down Expand Up @@ -498,8 +501,11 @@ private void doHandshake(boolean force) throws IOException, EofException {
throw new ClosedChannelException();
}
if (force || !negotiated) {
logger.log(Level.FINEST, "Calling SSLEngine.beginHandshake()");
engine.beginHandshake();
if (!handWasTouched) {
logger.log(Level.FINEST, "Calling SSLEngine.beginHandshake()");
engine.beginHandshake();
handWasTouched = true;
}
writeAndHandshake();

if (engine.getSession().getProtocol().startsWith("DTLS")) {
Expand Down