Updated: 2025/Nov/16

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SSL_stream_conclude(3)              OpenSSL             SSL_stream_conclude(3)


NAME
       SSL_stream_conclude - conclude the sending part of a QUIC stream

SYNOPSIS
        #include <openssl/ssl.h>

        __owur int SSL_stream_conclude(SSL *s, uint64_t flags);

DESCRIPTION
       SSL_stream_conclude() signals the normal end-of-stream condition for
       the send part of a QUIC stream. If called on a QUIC connection SSL
       object with an associated default stream, it signals the end of the
       single stream to the peer.

       Any data already queued for transmission via a call to SSL_write() will
       still be written in a reliable manner before the end-of-stream is
       signalled, assuming the connection remains healthy. This function can
       be thought of as appending a logical end-of-stream marker after any
       data which has previously been written to the stream via calls to
       SSL_write(). Further attempts to call SSL_write() after calling this
       function will fail.

       When calling this on a stream, the receive part of the stream remains
       unaffected, and the peer may continue to send data until it also
       signals the end of the stream. Thus, SSL_read() can still be used.

       flags is reserved and should be set to 0.

       Only the first call to this function has any effect for a given stream;
       subsequent calls are no-ops. This is considered a success case.

       This function is not supported on an object other than a QUIC stream
       SSL object.

RETURN VALUES
       Returns 1 on success and 0 on failure.

       Returns 0 if called on an SSL object not representing a QUIC stream.

SEE ALSO
       openssl-quic(7), ssl(7), SSL_shutdown_ex(3)

HISTORY
       The SSL_stream_conclude() function was added in OpenSSL 3.2.

COPYRIGHT
       Copyright 2022-2023 The OpenSSL Project Authors. All Rights Reserved.

       Licensed under the Apache License 2.0 (the "License").  You may not use
       this file except in compliance with the License.  You can obtain a copy
       in the file LICENSE in the source distribution or at
       <https://www.openssl.org/source/license.html>.

3.5.1                             2025-07-01            SSL_stream_conclude(3)