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2b5a546ce1
Reviewed-by: Matt Caswell <matt@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/20765)
100 lines
2.8 KiB
Plaintext
100 lines
2.8 KiB
Plaintext
=pod
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=head1 NAME
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SSL_set_incoming_stream_policy, SSL_INCOMING_STREAM_POLICY_AUTO,
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SSL_INCOMING_STREAM_POLICY_ACCEPT,
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SSL_INCOMING_STREAM_POLICY_REJECT - manage the QUIC incoming stream
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policy
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=head1 SYNOPSIS
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#include <openssl/ssl.h>
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#define SSL_INCOMING_STREAM_POLICY_AUTO
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#define SSL_INCOMING_STREAM_POLICY_ACCEPT
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#define SSL_INCOMING_STREAM_POLICY_REJECT
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int SSL_set_incoming_stream_policy(SSL *conn, int policy,
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uint64_t app_error_code);
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=head1 DESCRIPTION
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SSL_set_incoming_stream_policy() policy changes the incoming stream policy for a
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QUIC connection. Depending on the policy configured, OpenSSL QUIC may
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automatically reject incoming streams initiated by the peer. This is intended to
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ensure that legacy applications using single-stream operation with a default
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stream on a QUIC connection SSL object are not passed remotely-initiated streams
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by a peer which those applications are not prepared to handle.
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I<app_error_code> is an application error code which will be used in any QUIC
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B<STOP_SENDING> or B<RESET_STREAM> frames generated to implement the policy. The
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default application error code is 0.
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The valid values for I<policy> are:
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=over 4
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=item SSL_INCOMING_STREAM_POLICY_AUTO
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This is the default setting. Incoming streams are accepted according to the
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following rules:
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=over 4
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=item *
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If the default stream mode (configured using L<SSL_set_default_stream_mode(3)>)
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is set to B<SSL_DEFAULT_STREAM_MODE_AUTO_BIDI> (the default) or
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B<SSL_DEFAULT_STREAM_MODE_AUTO_UNI>, the incoming stream is rejected.
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=item *
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Otherwise (where the default stream mode is B<SSL_DEFAULT_STREAM_MODE_NONE>),
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the application is assumed to be stream aware, and the incoming stream is
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accepted.
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=back
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=item SSL_INCOMING_STREAM_POLICY_ACCEPT
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Always accept incoming streams, allowing them to be dequeued using
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L<SSL_accept_stream(3)>.
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=item SSL_INCOMING_STREAM_POLICY_REJECT
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Always reject incoming streams.
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=back
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Where an incoming stream is rejected, it is rejected immediately and it is not
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possible to gain access to the stream using L<SSL_accept_stream(3)>. The stream
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is rejected using QUIC B<STOP_SENDING> and B<RESET_STREAM> frames as
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appropriate.
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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 stream SSL object, or on a non-QUIC SSL
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object.
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=head1 SEE ALSO
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L<SSL_set_default_stream_mode(3)>, L<SSL_accept_stream(3)>
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=head1 HISTORY
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SSL_set_incoming_stream_policy() 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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