/*
* Try to flush out any existing outbound data, then try to wrap
* anything new contained in the src buffer.
* <P>
* Return the number of bytes actually consumed from the buffer,
* but the data may actually be still sitting in the output buffer,
* waiting to be flushed.
*/
private int doWrite(ByteBuffer src) throws IOException {
int retValue = 0;
if (outNetBB.hasRemaining() && !tryFlush(outNetBB)) {
return retValue;
}
/*
* The data buffer is empty, we can reuse the entire buffer.
*/
outNetBB.clear();
SSLEngineResult result = sslEngine.wrap(src, outNetBB);
retValue = result.bytesConsumed();
outNetBB.flip();
switch (result.getStatus()) {
case OK:
if (result.getHandshakeStatus() == HandshakeStatus.NEED_TASK) {
doTasks();
}
break;
default:
throw new IOException("sslEngine error during data write: " + result.getStatus());
}
/*
* Try to flush the data, regardless of whether or not
* it's been selected. Odds of a write buffer being full
* is less than a read buffer being empty.
*/
if (outNetBB.hasRemaining()) {
tryFlush(outNetBB);
}
return retValue;
}
