System.Net.Sockets.SocketException (0x80004005):一个已建立的连接被您的主
本文关键字:建立 一个 连接 Sockets Net SocketException 0x80004005 System | 更新日期: 2023-09-27 18:08:51
我制作了一个windows服务远程服务器程序,它能够与侦听广播请求的windows CE设备(作为远程客户端)通信,将请求保存到文件中,检查它并将所请求的文件内容发送回跟踪。我已经在(c#)异步传输模式下实现了它。它工作正常,但就在2天前我遇到了这个套接字异常:
System.Net.Sockets.SocketException (0x80004005): An established connection was aborted by the software in your host machine at System.Net.Sockets.Socket.BeginReceive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags, AsyncCallback callback, Object state)
这是我的代码它指向异常
public void AcceptCallback(IAsyncResult result)
{
ConnectionInfo connection = new ConnectionInfo();
try
{
long connection_number;
//finish accept
Socket s;
s = (Socket)result.AsyncState;
connection.socket = s.EndAccept(result);
connection.socket.Blocking = false;
connection.Buffer = new byte[10000]; //1kb buffer minimum
orionIP = ((IPEndPoint)connection.socket.RemoteEndPoint).Address.ToString();
lock (connections) connections.Add(connection);
IPHostEntry hostName = Dns.GetHostEntry(orionIP);
machineName = hostName.HostName;
lock (connections) connections.Add(connection);
//count client connected
connection_number = Interlocked.Increment(ref connection_count);
//start receive -> error here
connection.socket.BeginReceive(connection.Buffer, 0, connection.Buffer.Length,
SocketFlags.None, new AsyncCallback(ReceiveCallBack), connection);
//start new accept
serverSocket.BeginAccept(new AsyncCallback(AcceptCallback), result.AsyncState);
}//end try
catch (SocketException ex)
{ //later log files for error events - > ex.SocketErrorCode
string path = "eventlogs.txt";
//create error log files to write error here
File.WriteAllText(path, ex.ToString());
CloseConnection(connection);
}
catch (Exception exp)
{
string path = "eventlogs.txt";
//create error log files to write error here
File.WriteAllText(path, exp.ToString());
CloseConnection(connection);
// log error file later ("Socket Exception:" + exp.ToString());
}
}
发生异常时,我没有对它进行重大修改。我遵循了所有的指示,以及其他人遇到同样的问题,如关闭防火墙,maxusePort
,检查网络连接和设备,如果正确配置,缓冲区大小。我也检查竞争条件和WSAECONNABORTED
问题,我可能处理。
接收回调
private void ReceiveCallBack(IAsyncResult result)
{
//06.10 added thread for writing in the file
//added part review ()
//getemp file
string pathwrite = CreateTmpFile();//"streamdata.txt";
ConnectionInfo connection = (ConnectionInfo)result.AsyncState;
try
{
int bytesRead = connection.socket.EndReceive(result);
if (bytesRead > 0)
{
lock (serverlock)
{
connection.sb.Append(Encoding.UTF8.GetString(connection.Buffer, 0, bytesRead));
}
lock (connections)
{
foreach (ConnectionInfo conn in connections)
{
if (connection != conn)
{
conn.socket.Send(connection.Buffer, bytesRead, SocketFlags.None);
}
}
}
connection.socket.BeginReceive(connection.Buffer, 0, connection.Buffer.Length, SocketFlags.None,new AsyncCallback(ReceiveCallBack), connection);
}
else
{
string strContent = connection.sb.ToString();
File.WriteAllText(pathwrite, strContent);
AccessData();
CloseConnection(connection);
}
}//end try
catch(SocketException ex){
string path = "eventlogs2.txt";
//create error log files to write error here
File.WriteAllText(path, ex.ToString());
// CloseConnection(connection);
}
catch(Exception ex)
{
string path = "eventlogs2.txt";
//create error log files to write error here
File.WriteAllText(path, ex.ToString());
// CloseConnection(connection);
}
}
如果当前接受的连接存在网络错误,则不接受新的连接。将BeginAccept移动到单独的try/catch中。
public void AcceptCallback(IAsyncResult result)
{
ConnectionInfo connection = new ConnectionInfo();
try
{
long connection_number;
Socket s;
s = (Socket)result.AsyncState;
connection.socket = s.EndAccept(result);
connection.socket.Blocking = false;
connection.Buffer = new byte[10000]; //1kb buffer minimum
orionIP = ((IPEndPoint)connection.socket.RemoteEndPoint).Address.ToString();
lock (connections) connections.Add(connection);
IPHostEntry hostName = Dns.GetHostEntry(orionIP);
machineName = hostName.HostName;
lock (connections) connections.Add(connection);
connection_number = Interlocked.Increment(ref connection_count);
connection.socket.BeginReceive(connection.Buffer, 0, connection.Buffer.Length,
SocketFlags.None, new AsyncCallback(ReceiveCallBack), connection);
}
catch (SocketException ex)
{
string path = "eventlogs.txt";
File.WriteAllText(path, ex.ToString());
CloseConnection(connection);
}
catch (Exception exp)
{
string path = "eventlogs.txt";
File.WriteAllText(path, exp.ToString());
CloseConnection(connection);
}
try
{
serverSocket.BeginAccept(new AsyncCallback(AcceptCallback), result.AsyncState);
}
catch (Exception exception)
{
//failed to accept. shut down service.
}
}