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5fc256cd6b
Reviewed-by: Matt Caswell <matt@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/20765)
80 lines
2.5 KiB
Plaintext
80 lines
2.5 KiB
Plaintext
=pod
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=head1 NAME
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SSL_stream_reset - reset a QUIC stream
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=head1 SYNOPSIS
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#include <openssl/ssl.h>
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typedef struct ssl_stream_reset_args_st {
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uint64_t quic_error_code;
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} SSL_STREAM_RESET_ARGS;
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int SSL_stream_reset(SSL *ssl,
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const SSL_STREAM_RESET_ARGS *args,
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size_t args_len);
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=head1 DESCRIPTION
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The SSL_stream_reset() function resets the send part of a QUIC stream when
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called on a QUIC stream SSL object, or on a QUIC connection SSL object with a
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default stream attached.
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If I<args> is non-NULL, I<args_len> must be set to C<sizeof(*args)>.
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I<quic_error_code> is an application-specified error code, which must be in the
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range [0, 2**62-1]. If I<args> is NULL, a value of 0 is used.
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Resetting a stream indicates to an application that the sending part of the
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stream is terminating abnormally. When a stream is reset, the implementation
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does not guarantee that any data already passed to L<SSL_write(3)> will be
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received by the peer, and data already passed to L<SSL_write(3)> but not yet
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transmitted may or may not be discarded. As such, you should only reset
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a stream when the information transmitted on the stream no longer matters, for
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example due to an error condition.
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This function cannot be called on a unidirectional stream initiated by the peer,
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as only the sending side of a stream can initiate a stream reset.
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It is also possible to trigger a stream reset by calling L<SSL_free(3)>; see the
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documentation for L<SSL_free(3)> for details.
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The receiving part of the stream (for bidirectional streams) continues to
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function normally.
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=head1 NOTES
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This function corresponds to the QUIC B<RESET_STREAM> frame.
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=head1 RETURN VALUES
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Returns 1 on success and 0 on failure.
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This function fails if called on a QUIC connection SSL object without a default
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stream attached, or on a non-QUIC SSL object.
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After the first call to this function succeeds for a given stream,
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subsequent calls succeed but are ignored. The application error code
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used is that passed to the first successful call to this function.
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=head1 SEE ALSO
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L<SSL_free(3)>
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=head1 HISTORY
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SSL_stream_reset() was added in OpenSSL 3.2.
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=head1 COPYRIGHT
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Copyright 2002-2023 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the Apache License 2.0 (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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