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// Copyright (C) 2021 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#pragma once
#include <functional>
#include <memory>
#include "net/async_data_channel.h"
namespace android {
namespace net {
class AsyncDataChannelServer;
// Callback thas is called when a new client connection has been accepted.
using ConnectCallback = std::function<void(std::shared_ptr<AsyncDataChannel>,
AsyncDataChannelServer* server)>;
// An AsyncDataChannelServer is capable of listening to incoming connections.
//
// A Callback will be invoked whenever a new connection has been accepted.
class AsyncDataChannelServer {
public:
// Destructor.
virtual ~AsyncDataChannelServer() = default;
// Start listening for new connections. The callback will be invoked
// when a new socket has been accepted.
//
// errno will be set in case of failure.
virtual bool StartListening() = 0;
// Stop listening for new connections. The callback will not be
// invoked, and sockets will not be accepted.
//
// This DOES not disconnect the server, and connections can still
// be queued up.
virtual void StopListening() = 0;
// Disconnects the server, no new connections are possible.
// The callback will never be invoked again.
virtual void Close() = 0;
// True if this server is connected and can accept incoming
// connections.
virtual bool Connected() = 0;
// Registers the callback that should be invoked whenever a new socket was
// accepted.
//
// Before the callback the server should have stopped listening for new
// incoming connections. The callee is responsible for calling StartListening
// if needed.
void SetOnConnectCallback(const ConnectCallback& callback) {
callback_ = callback;
};
protected:
ConnectCallback callback_;
};
} // namespace net
} // namespace android
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