/// <summary>
/// 发起连接（异步）
/// </summary>
/// <param name="remoteEndPoint">远程标识网络地址</param>
/// <param name="state">连接状态</param>
/// <param name="cancellationToken">异步操作的Token，用于取消异步操作</param>
/// <returns>连接状态</returns>
async ValueTask <ConnectState> IConnector.ConnectAsync(EndPoint remoteEndPoint, ConnectState state, CancellationToken cancellationToken)
{
var result = await ConnectAsync(remoteEndPoint, state, cancellationToken);
if (cancellationToken.IsCancellationRequested)
{
return(ConnectState.CancelledState);
}
var nextConnector = NextConnector;
if (!result.Result || nextConnector == null)
{
return(result);
}
return(await nextConnector.ConnectAsync(remoteEndPoint, result, cancellationToken));
}
protected override async ValueTask <ConnectState> ConnectAsync(EndPoint remoteEndPoint, ConnectState state, CancellationToken cancellationToken)
{
var socket = new Socket(remoteEndPoint.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
try
{
var localEndPoint = LocalEndPoint;
if (localEndPoint != null)
{
socket.ExclusiveAddressUse = false;
socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, 1);
socket.Bind(localEndPoint);
}
await socket.ConnectAsync(remoteEndPoint);
}
catch (Exception e)
{
return(new ConnectState
{
Result = false,
Exception = e
});
}
return(new ConnectState
{
Result = true,
Socket = socket
});
}
/// <summary> /// 抽象方法：发起连接（异步） /// </summary> /// <param name="remoteEndPoint">远程网络标识</param> /// <param name="state">连接状态</param> /// <param name="cancellationToken">用于取消异步操作</param> /// <returns></returns> protected abstract ValueTask <ConnectState> ConnectAsync(EndPoint remoteEndPoint, ConnectState state, CancellationToken cancellationToken);