gely compatible semantics. Since QUIC implements its own flow control and uses UDP datagrams, backpressure conditions in terms of the underlying BIO providing network I/O are not directly relevant to the circumstances in which these errors are produced. In particular, <b>SSL_ERROR_WANT_WRITE</b> indicates that the OpenSSL internal send buffer for a given QUIC stream has been filled. Likewise, <b>SSL_ERROR_WANT_READ</b> indicates that the OpenSSL internal receive buffer for a given QUIC stream is empty.</p>
