SSL_stream_reset¶

NAME¶

SSL_stream_reset - reset a QUIC stream

SYNOPSIS¶

#include <openssl/ssl.h>

typedef struct ssl_stream_reset_args_st {
    uint64_t quic_error_code;
} SSL_STREAM_RESET_ARGS;

int SSL_stream_reset(SSL *ssl,
                     const SSL_STREAM_RESET_ARGS *args,
                     size_t args_len);

DESCRIPTION¶

The SSL_stream_reset() function resets the send part of a QUIC stream when called on a QUIC stream SSL object, or on a QUIC connection SSL object with a default stream attached.

If args is non-NULL, args_len must be set to sizeof(*args).

quic_error_code is an application-specified error code, which must be in the range [0, 2**62-1]. If args is NULL, a value of 0 is used.

Resetting a stream indicates to an application that the sending part of the stream is terminating abnormally. When a stream is reset, the implementation does not guarantee that any data already passed to SSL_write(3) will be received by the peer, and data already passed to SSL_write(3) but not yet transmitted may or may not be discarded. As such, you should only reset a stream when the information transmitted on the stream no longer matters, for example due to an error condition.

This function cannot be called on a unidirectional stream initiated by the peer, as only the sending side of a stream can initiate a stream reset.

It is also possible to trigger a stream reset by calling SSL_free(3); see the documentation for SSL_free(3) for details.

The receiving part of the stream (for bidirectional streams) continues to function normally.

NOTES¶

This function corresponds to the QUIC RESET_STREAM frame.

RETURN VALUES¶

Returns 1 on success and 0 on failure.

This function fails if called on a QUIC connection SSL object without a default stream attached, or on a non-QUIC SSL object.

After the first call to this function succeeds for a given stream, subsequent calls succeed but are ignored. The application error code used is that passed to the first successful call to this function.

HISTORY¶

SSL_stream_reset() was added in OpenSSL 3.2.

COPYRIGHT¶

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.