sdk/fidl/fuchsia.unknown/unknown.fidl

// Copyright 2022 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
@available(added=9)
library fuchsia.unknown;

using zx;

/// Provides a means of duplicating a connection.
///
/// See the composing protocol's documentation for a description of
/// connection-scoped state, if any.
protocol Cloneable {
    @selector("Clone")
    Clone2(resource struct {
        request server_end:Cloneable;
    });
};

/// Provides a means of synchronously closing a connection.
protocol Closeable {
    /// Terminates the connection.
    ///
    /// After calling `Close`, the client must not send any other requests.
    ///
    /// Servers, after sending the status response, should close the connection
    /// regardless of status and without sending an epitaph.
    ///
    /// Closing the client end of the channel should be semantically equivalent
    /// to calling `Close` without knowing when the close has completed or its
    /// status.
    @selector("fuchsia.io/Node.Close")
    Close() -> () error zx.status;
};

/// Provides a means of identifying a type-erased protocol.
protocol Queryable {
    Query() -> (struct {
        /// Identifies the underlying protocol.
        protocol vector<uint8>:MAX;
    });
};