public void StartLongConnection()
{
while (IsKeepLongConnection)
{
try
{
LongConnectSender = new SocketSender(CurrentRoute.IsNextNodeProxy);
LongConnectSender.ConnectWithTimeout(CurrentRoute.NextNode.Address, BuildConnectionTimeout);
LongConnectSender.SetTimeout(LongConnectionTimeout, LongConnectionTimeout);
if (CurrentRoute.IsNextNodeProxy)
{
LongConnectSender.SendBytes(SocketPacketFlag.ReversedProxyLongConnectionRequest, CurrentRoute.GetBytes(node_start_index: 1));
LongConnectSender.ReceiveBytes(out HB32Header header, out byte[] bytes);
if (header.Flag != SocketPacketFlag.ProxyResponse)
{
throw new Exception(string.Format("Proxy exception at depth {0} : {1}. {2}",
header.I1, CurrentRoute.ProxyRoute[header.I1], Encoding.UTF8.GetString(bytes)));
}
}
return;
}
catch (Exception ex)
{
Log("Start long connection exception : " + ex.Message, LogLevel.Error);
}
Thread.Sleep(ReconnectInterval);
}
}
/// <summary>
/// 当上一级代理不是挂载在当前代理上的节点上时, 利用此方法完成同方向代理的中继, 并返回上级代理结果
/// </summary>
/// <param name="responder"></param>
/// <param name="route"></param>
/// <returns></returns>
private SocketSender ConnectionRelay(SocketResponder responder, HB32Header header, ConnectionRoute route)
{
if (route.IsNextNodeProxy)
{
/// 继续正向代理
SocketSender sender = new SocketSender(true);
string err_msg = "";
try
{
sender.ConnectWithTimeout(route.NextNode.Address, Config.BuildConnectionTimeout);
sender.SetTimeout(Config.SocketSendTimeout, Config.SocketReceiveTimeout);
}
catch (Exception ex)
{
/// 当前代理建立连接失败
err_msg = ex.Message;
}
if (string.IsNullOrEmpty(err_msg))
{
HB32Header next_header = header.Copy();
next_header.I1++;
sender.SendBytes(next_header, route.GetBytes(node_start_index: 1));
sender.ReceiveBytes(out HB32Header respond_header, out byte[] respond_bytes);
if ((respond_header.Flag | SocketPacketFlag.ExceptionFlag) == 0)
{
responder.SendHeader(respond_header);
}
else
{
/// 上级或更上级代理建立连接失败, header 中包含抛出异常的代理位置
responder.SendBytes(respond_header, respond_bytes);
}
}
else
{
HB32Header err_header = header.Copy();
err_header.Flag = (SocketPacketFlag)(((int)err_header.Flag & 0xFFFF00) | 0x90);
responder.SendBytes(err_header, err_msg);
}
return(sender);
}
else
{
/// 直连 server
SocketSender sender = new SocketSender(false);
string err_msg = "";
try
{
sender.ConnectWithTimeout(route.ServerAddress.Address, Config.BuildConnectionTimeout);
sender.SetTimeout(Config.SocketSendTimeout, Config.SocketReceiveTimeout);
}
catch (Exception ex)
{
err_msg = ex.Message;
}
/// response
if (string.IsNullOrEmpty(err_msg))
{
HB32Header resp_header = header.Copy();
resp_header.Flag = (SocketPacketFlag)(((int)resp_header.Flag & 0xFFFF00) | 0x10);
responder.SendHeader(resp_header);
}
else
{
HB32Header err_header = header.Copy();
err_header.Flag = (SocketPacketFlag)(((int)err_header.Flag & 0xFFFF00) | 0x90);
responder.SendBytes(err_header, err_msg);
}
return(sender);
}
}
