4 // Phillip Pearson (pp@myelin.co.nz)
5 // Gonzalo Paniagua Javier (gonzalo@ximian.com)
7 // Sridhar Kulkarni (sridharkulkarni@gmail.com)
8 // Marek Safar (marek.safar@gmail.com)
11 // Copyright (C) 2001, Phillip Pearson http://www.myelin.co.nz
13 // (c) 2003 Ximian, Inc. (http://www.ximian.com)
14 // (c) 2004-2006 Novell, Inc.
15 // Copyright 2011 Xamarin Inc.
19 // Permission is hereby granted, free of charge, to any person obtaining
20 // a copy of this software and associated documentation files (the
21 // "Software"), to deal in the Software without restriction, including
22 // without limitation the rights to use, copy, modify, merge, publish,
23 // distribute, sublicense, and/or sell copies of the Software, and to
24 // permit persons to whom the Software is furnished to do so, subject to
25 // the following conditions:
27 // The above copyright notice and this permission notice shall be
28 // included in all copies or substantial portions of the Software.
30 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
31 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
32 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
33 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
34 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
35 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
36 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
41 using System
.Threading
.Tasks
;
43 namespace System
.Net
.Sockets
46 /// A slightly more abstracted way to listen for incoming
47 /// network connections than a Socket.
49 public class TcpListener
60 /// Some code that is shared between the constructors.
62 private void Init (AddressFamily family
, EndPoint ep
)
65 server
= new Socket(family
, SocketType
.Stream
, ProtocolType
.Tcp
);
70 /// Constructs a new TcpListener to listen on a specified port
72 /// <param name="port">The port to listen on, e.g. 80 if you
73 /// are a web server</param>
74 [Obsolete ("Use TcpListener (IPAddress address, int port) instead")]
75 public TcpListener (int port
)
77 if (port
< 0 || port
> 65535)
78 throw new ArgumentOutOfRangeException ("port");
80 Init (AddressFamily
.InterNetwork
, new IPEndPoint (IPAddress
.Any
, port
));
84 /// Constructs a new TcpListener with a specified local endpoint
86 /// <param name="local_end_point">The endpoint</param>
87 public TcpListener (IPEndPoint localEP
)
90 throw new ArgumentNullException ("localEP");
92 Init (localEP
.AddressFamily
, localEP
);
96 /// Constructs a new TcpListener, listening on a specified port
97 /// and IP (for use on a multi-homed machine)
99 /// <param name="listen_ip">The IP to listen on</param>
100 /// <param name="port">The port to listen on</param>
101 public TcpListener (IPAddress localaddr
, int port
)
103 if (localaddr
== null)
104 throw new ArgumentNullException ("localaddr");
106 if (port
< 0 || port
> 65535)
107 throw new ArgumentOutOfRangeException ("port");
109 Init (localaddr
.AddressFamily
, new IPEndPoint (localaddr
, port
));
116 /// A flag that is 'true' if the TcpListener is listening,
117 /// or 'false' if it is not listening
119 protected bool Active
121 get { return active; }
125 /// The local end point
127 public EndPoint LocalEndpoint
131 return server
.LocalEndPoint
;
138 /// The listening socket
142 get { return server; }
146 /// Specifies whether the TcpListener allows only one
147 /// underlying socket to listen to a specific port
149 public bool ExclusiveAddressUse
152 if (server
== null) {
153 throw new ObjectDisposedException (GetType ().ToString ());
156 throw new InvalidOperationException ("The TcpListener has been started");
159 return(server
.ExclusiveAddressUse
);
162 if (server
== null) {
163 throw new ObjectDisposedException (GetType ().ToString ());
166 throw new InvalidOperationException ("The TcpListener has been started");
169 server
.ExclusiveAddressUse
= value;
176 /// Accepts a pending connection
178 /// <returns>A Socket object for the new connection</returns>
179 public Socket
AcceptSocket ()
182 throw new InvalidOperationException ("Socket is not listening");
184 return server
.Accept();
188 /// Accepts a pending connection
190 /// <returns>A TcpClient
191 /// object made from the new socket.</returns>
192 public TcpClient
AcceptTcpClient ()
195 throw new InvalidOperationException ("Socket is not listening");
197 Socket clientSocket
= server
.Accept ();
199 TcpClient client
= new TcpClient(clientSocket
);
204 public void AllowNatTraversal (bool allowed
)
207 throw new InvalidOperationException (SR
.GetString (SR
.net_tcplistener_mustbestopped
));
210 server
.SetIPProtectionLevel (IPProtectionLevel
.Unrestricted
);
212 server
.SetIPProtectionLevel (IPProtectionLevel
.EdgeRestricted
);
215 public static TcpListener
Create (int port
)
217 if (port
< 0 || port
> 65535)
218 throw new ArgumentOutOfRangeException ("port");
220 TcpListener listener
= new TcpListener (IPAddress
.IPv6Any
, port
);
221 listener
.Server
.DualMode
= true;
227 /// Destructor - stops the listener listening
236 /// Returns 'true' if there is a connection waiting to be accepted
237 /// with AcceptSocket() or AcceptTcpClient().
239 public bool Pending ()
242 throw new InvalidOperationException ("Socket is not listening");
244 return server
.Poll(0, SelectMode
.SelectRead
);
248 /// Tells the TcpListener to start listening.
252 // MS: sets Listen to Int32.MaxValue
254 // According to the man page some BSD and BSD-derived
255 // systems limit the backlog to 5. This should really be
256 // configurable though
260 /// Tells the TcpListener to start listening for max number
261 /// of pending connections.
264 public void Start (int backlog
)
269 if (server
== null) {
270 throw new InvalidOperationException ("Invalid server socket");
273 server
.Bind (savedEP
);
274 server
.Listen (backlog
);
278 public IAsyncResult
BeginAcceptSocket (AsyncCallback callback
,
281 if (server
== null) {
282 throw new ObjectDisposedException (GetType ().ToString ());
285 return(server
.BeginAccept (callback
, state
));
288 public IAsyncResult
BeginAcceptTcpClient (AsyncCallback callback
, object state
)
290 if (server
== null) {
291 throw new ObjectDisposedException (GetType ().ToString ());
294 return(server
.BeginAccept (callback
, state
));
297 public Socket
EndAcceptSocket (IAsyncResult asyncResult
)
299 return(server
.EndAccept (asyncResult
));
302 public TcpClient
EndAcceptTcpClient (IAsyncResult asyncResult
)
304 Socket clientSocket
= server
.EndAccept (asyncResult
);
305 TcpClient client
= new TcpClient (clientSocket
);
311 /// Tells the TcpListener to stop listening and dispose
312 /// of all managed resources.
322 Init (AddressFamily
.InterNetwork
, savedEP
);
325 public Task
<Socket
> AcceptSocketAsync ()
327 return Task
<Socket
>.Factory
.FromAsync (BeginAcceptSocket
, EndAcceptSocket
, null);
330 public Task
<TcpClient
> AcceptTcpClientAsync ()
332 return Task
<TcpClient
>.Factory
.FromAsync (BeginAcceptTcpClient
, EndAcceptTcpClient
, null);