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1e4a9d882f
Reviewed-by: Matt Caswell <matt@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/20765)
109 lines
3.2 KiB
Plaintext
109 lines
3.2 KiB
Plaintext
=pod
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=head1 NAME
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SSL_set_incoming_stream_reject_policy, SSL_INCOMING_STREAM_REJECT_POLICY_AUTO,
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SSL_INCOMING_STREAM_REJECT_POLICY_ACCEPT,
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SSL_INCOMING_STREAM_REJECT_POLICY_REJECT - manage the QUIC incoming stream
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rejection policy
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=head1 SYNOPSIS
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#include <openssl/ssl.h>
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#define SSL_INCOMING_STREAM_REJECT_POLICY_AUTO
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#define SSL_INCOMING_STREAM_REJECT_POLICY_ACCEPT
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#define SSL_INCOMING_STREAM_REJECT_POLICY_REJECT
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int SSL_set_incoming_stream_reject_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_reject_policy() policy changes the incoming stream
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rejection policy for a QUIC connection. Depending on the policy configured,
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OpenSSL QUIC may automatically reject incoming streams initiated by the peer.
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This is intended to ensure that legacy applications using single-stream
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operation with a default stream on a QUIC connection SSL object are not passed
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remotely-initiated streams by a peer which those applications are not prepared
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to handle.
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B<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 rejection
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policy. The default application error code is 0.
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The valid values for B<policy> are:
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=over 4
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=item SSL_INCOMING_STREAM_REJECT_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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An incoming stream is accepted if L<SSL_detach_stream(3)> has ever been called
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on a QUIC connection SSL object, as the application is assumed to be
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stream-aware in this case.
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=item *
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Otherwise, if the default stream mode (configured using
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L<SSL_set_default_stream_mode(3)>) is set to
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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_REJECT_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_REJECT_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_attach_stream(3)>, L<SSL_detach_stream(3)>,
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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_reject_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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