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The Bouncy Castle Java APIs for the TLS, including a JSSE provider. The APIs are designed primarily to be used in conjunction with the BC FIPS provider. The APIs may also be used with other providers although if being used in a FIPS context it is the responsibility of the user to ensure that any other providers used are FIPS certified and used appropriately.

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package org.bouncycastle.tls;

import java.io.IOException;

public class DTLSTransport
    implements DatagramTransport
{
    private final DTLSRecordLayer recordLayer;

    DTLSTransport(DTLSRecordLayer recordLayer)
    {
        this.recordLayer = recordLayer;
    }

    public int getReceiveLimit()
        throws IOException
    {
        return recordLayer.getReceiveLimit();
    }

    public int getSendLimit()
        throws IOException
    {
        return recordLayer.getSendLimit();
    }

    public int receive(byte[] buf, int off, int len, int waitMillis)
        throws IOException
    {
        try
        {
            return recordLayer.receive(buf, off, len, waitMillis);
        }
        catch (TlsFatalAlert fatalAlert)
        {
            recordLayer.fail(fatalAlert.getAlertDescription());
            throw fatalAlert;
        }
        catch (IOException e)
        {
            recordLayer.fail(AlertDescription.internal_error);
            throw e;
        }
        catch (RuntimeException e)
        {
            recordLayer.fail(AlertDescription.internal_error);
            throw new TlsFatalAlert(AlertDescription.internal_error, e);
        }
    }

    public void send(byte[] buf, int off, int len)
        throws IOException
    {
        try
        {
            recordLayer.send(buf, off, len);
        }
        catch (TlsFatalAlert fatalAlert)
        {
            recordLayer.fail(fatalAlert.getAlertDescription());
            throw fatalAlert;
        }
        catch (IOException e)
        {
            recordLayer.fail(AlertDescription.internal_error);
            throw e;
        }
        catch (RuntimeException e)
        {
            recordLayer.fail(AlertDescription.internal_error);
            throw new TlsFatalAlert(AlertDescription.internal_error, e);
        }
    }

    public void close()
        throws IOException
    {
        recordLayer.close();
    }
}