+++ /dev/null
-/***
- This file is part of avahi.
-
- avahi is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as
- published by the Free Software Foundation; either version 2.1 of the
- License, or (at your option) any later version.
-
- avahi is distributed in the hope that it will be useful, but WITHOUT
- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
- Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with avahi; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
- USA.
-***/
-
-using System;
-using System.Collections;
-using System.Net;
-using System.Runtime.InteropServices;
-using System.Text;
-using Mono.Unix;
-
-namespace Avahi
-{
-
- internal delegate void HostNameResolverCallback (IntPtr resolver, int iface, Protocol proto,
- ResolverEvent revent, IntPtr hostname, IntPtr address,
- LookupResultFlags flags, IntPtr userdata);
-
- public class HostNameResolver : ResolverBase, IDisposable
- {
- private IntPtr handle;
- private Client client;
- private int iface;
- private Protocol proto;
- private string hostname;
- private Protocol aproto;
- private LookupFlags flags;
- private HostNameResolverCallback cb;
-
- private IPAddress currentAddress;
- private string currentHost;
-
- private ArrayList foundListeners = new ArrayList ();
- private ArrayList timeoutListeners = new ArrayList ();
-
- [DllImport ("avahi-client")]
- private static extern IntPtr avahi_host_name_resolver_new (IntPtr client, int iface, Protocol proto,
- byte[] hostname, Protocol aproto, LookupFlags flags,
- HostNameResolverCallback cb, IntPtr userdata);
-
- [DllImport ("avahi-client")]
- private static extern void avahi_host_name_resolver_free (IntPtr handle);
-
- public event HostAddressHandler Found
- {
- add {
- foundListeners.Add (value);
- Start ();
- }
- remove {
- foundListeners.Remove (value);
- Stop (false);
- }
- }
-
- public event EventHandler Timeout
- {
- add {
- timeoutListeners.Add (value);
- Start ();
- }
- remove {
- timeoutListeners.Remove (value);
- Stop (false);
- }
- }
-
- public IPAddress Address
- {
- get { return currentAddress; }
- }
-
- public string HostName
- {
- get { return currentHost; }
- }
-
- public HostNameResolver (Client client, string hostname) : this (client, -1, Protocol.Unspecified,
- hostname, Protocol.Unspecified,
- LookupFlags.None)
- {
- }
-
- public HostNameResolver (Client client, int iface, Protocol proto, string hostname,
- Protocol aproto, LookupFlags flags)
- {
- this.client = client;
- this.iface = iface;
- this.proto = proto;
- this.hostname = hostname;
- this.aproto = aproto;
- this.flags = flags;
- cb = OnHostNameResolverCallback;
- }
-
- ~HostNameResolver ()
- {
- Dispose ();
- }
-
- public void Dispose ()
- {
- Stop (true);
- }
-
- private void Start ()
- {
- if (client.Handle == IntPtr.Zero || handle != IntPtr.Zero ||
- (foundListeners.Count == 0 && timeoutListeners.Count == 0))
- return;
-
- lock (client) {
- handle = avahi_host_name_resolver_new (client.Handle, iface, proto,
- Utility.StringToBytes (hostname), aproto, flags,
- cb, IntPtr.Zero);
-
- if (handle == IntPtr.Zero)
- client.ThrowError ();
- }
- }
-
- private void Stop (bool force)
- {
- if (client.Handle != IntPtr.Zero && handle != IntPtr.Zero &&
- (force || (foundListeners.Count == 0 && timeoutListeners.Count == 0))) {
-
- lock (client) {
- avahi_host_name_resolver_free (handle);
- handle = IntPtr.Zero;
- }
- }
- }
-
- private void OnHostNameResolverCallback (IntPtr resolver, int iface, Protocol proto,
- ResolverEvent revent, IntPtr hostname, IntPtr address,
- LookupResultFlags flags, IntPtr userdata)
- {
- switch (revent) {
- case ResolverEvent.Found:
- currentAddress = Utility.PtrToAddress (address);
- currentHost = Utility.PtrToString (hostname);
-
- foreach (HostAddressHandler handler in foundListeners)
- handler (this, new HostAddressArgs (currentHost, currentAddress));
- break;
- case ResolverEvent.Failure:
- EmitFailure (client.LastError);
- break;
- }
- }
- }
-}