chromium/third_party/openscreen/src/cast/streaming/public/rpc_messenger.h

// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CAST_STREAMING_PUBLIC_RPC_MESSENGER_H_
#define CAST_STREAMING_PUBLIC_RPC_MESSENGER_H_

#include <functional>
#include <memory>
#include <string>
#include <utility>
#include <vector>

#include "cast/streaming/remoting.pb.h"
#include "util/flat_map.h"
#include "util/weak_ptr.h"

namespace openscreen::cast {

// Processes incoming and outgoing RPC messages and links them to desired
// components on both end points. For outgoing messages, the messenger
// must send an RPC message with associated handle value. On the messagee side,
// the message is sent to a pre-registered component using that handle.
// Before RPC communication starts, both sides need to negotiate the handle
// value in the existing RPC communication channel using the special handles
// |kAcquire*Handle|.
//
// NOTE: RpcMessenger doesn't actually send RPC messages to the remote. The
// session messenger needs to set SendMessageCallback, and call
// ProcessMessageFromRemote as appropriate. The RpcMessenger then distributes
// each RPC message to the subscribed component.
class RpcMessenger { … };

}  // namespace openscreen::cast

#endif  // CAST_STREAMING_PUBLIC_RPC_MESSENGER_H_