Socket: dispose network resources in C#

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5.00/5 (1 vote)

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hey

i wrote a client/server program, when client program try close the server program will recognize this action of client side, and try to dispose all assigned resources to that socket connection, an begin to re-listen on the same port

i did this to dispose network(dont know it is right to do or not)

<code>con.CurrentConnectionSocket.Close();
((System.IDisposable)con.CurrentConnectionSocket).Dispose();
</code>

BUT when i try to re-listen, catch a 'SocketException' with this exception message

Only one usage of each socket address (protocol/network address/port) is normally permitted

how do i handle this?

i need help ASAP

tnx in advance

Posted 26-Jan-11 8:05am

dariush_ha

Updated 26-Jan-11 8:06am

v2

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Nish Nishant · Answer 1 · 2011-01-26T08:25:00

Solution 1

You cannot reuse a disposed or closed socket. If you do that, instantiate a new instance of the Socket class. Or if you want to reuse it, do not call Close (which btw calls Dispose internally - so you don't need to call Dispose once you call Close anyway). Instead call Disconnect(true) on the socket instance.

[Update]
----------
In answer to your comment on reconnecting: Just do everything that you do to make the initial connection (other than instantiating the socket object).

Posted 26-Jan-11 8:25am

Nish Nishant

Updated 26-Jan-11 8:50am

v4

Comments

Sergey Alexandrovich Kryukov 26-Jan-11 15:03pm

Good answer, of course -- my 5.
The update is something OP could have guessed at once :-)
--SA

Sergey Alexandrovich Kryukov 26-Jan-11 15:03pm

OP commented:

tnx, but how do i re-connect then? i still catch that exception :(

Sergey Alexandrovich Kryukov 26-Jan-11 15:04pm

OP commented:

getting crazy for a simple reconnection code~X(

i do this but still have that problem[after i disconnect the socket]
Collapse

CurrentConnectionSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
CurrentConnectionSocket.Bind(ConnetionIPEP);
CurrentConnectionSocket.Listen(1);
ConnectionStatusString = "Waitting for client connection ....";
CurrentConnectionSocket.NoDelay = true;
StaticConnectionInfo.ConnectionRootMode = ConnectionMode.Listenning;
CurrentConnectionSocket.BeginAccept(new AsyncCallback(AcceptCon_SYNC), CurrentConnectionSocket);
StaticConnectionInfo.NetworkSideOption = Setting.SettingSideOption.Server;
StaticConnectionInfo.ServerConnectionRoot = this;

dariush_ha · Answer 2 · 2011-01-26T08:44:00

Solution 2

tnx, but how do i re-connect then? i still catch that exception :(

Posted 26-Jan-11 8:44am

dariush_ha

Updated 26-Jan-11 8:53am

v2

Comments

Sergey Alexandrovich Kryukov 26-Jan-11 15:03pm

OP commented:

getting crazy for a simple reconnection code~X(

i do this but still have that problem[after i disconnect the socket]
Collapse

CurrentConnectionSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
CurrentConnectionSocket.Bind(ConnetionIPEP);
CurrentConnectionSocket.Listen(1);
ConnectionStatusString = "Waitting for client connection ....";
CurrentConnectionSocket.NoDelay = true;
StaticConnectionInfo.ConnectionRootMode = ConnectionMode.Listenning;
CurrentConnectionSocket.BeginAccept(new AsyncCallback(AcceptCon_SYNC), CurrentConnectionSocket);
StaticConnectionInfo.NetworkSideOption = Setting.SettingSideOption.Server;
StaticConnectionInfo.ServerConnectionRoot = this;

dariush_ha · Answer 3 · 2011-01-26T08:58:00

getting crazy for a simple reconnection code~X(

i do this but still have that problem[after i disconnect the socket]

CurrentConnectionSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
CurrentConnectionSocket.Bind(ConnetionIPEP);
CurrentConnectionSocket.Listen(1);
ConnectionStatusString = "Waitting for client connection  ....";
CurrentConnectionSocket.NoDelay = true;
StaticConnectionInfo.ConnectionRootMode = ConnectionMode.Listenning;
CurrentConnectionSocket.BeginAccept(new AsyncCallback(AcceptCon_SYNC), CurrentConnectionSocket);
StaticConnectionInfo.NetworkSideOption = Setting.SettingSideOption.Server;
StaticConnectionInfo.ServerConnectionRoot = this;