Branching for wide-area publishing work

  


git-svn-id: file:///home/lennart/svn/public/avahi/branches/federico@1344 941a03a8-eaeb-0310-b9a0-b1bbd8fe43fe

1 files changed, 200 insertions, 0 deletions

diff --git a/trunk/avahi-sharp/DomainBrowser.cs b/trunk/avahi-sharp/DomainBrowser.cs
new file mode 100644
index 0000000..50da54e
--- /dev/null
+++ b/trunk/avahi-sharp/DomainBrowser.cs
@@ -0,0 +1,200 @@
+/* $Id$ */
+
+/***
+  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.Runtime.InteropServices;
+using System.Text;
+
+namespace Avahi
+{
+    internal delegate void DomainBrowserCallback (IntPtr browser, int iface, Protocol proto, BrowserEvent bevent,
+                                                  IntPtr domain, LookupResultFlags flags, IntPtr userdata);
+
+    public enum DomainBrowserType {
+        Browse,
+        BrowseDefault,
+        Register,
+        RegisterDefault,
+        BrowseLegacy
+    }
+
+    public struct DomainInfo
+    {
+        public int NetworkInterface;
+        public Protocol Protocol;
+        public string Domain;
+        public LookupResultFlags Flags;
+    }
+
+    public class DomainInfoArgs : EventArgs
+    {
+        private DomainInfo domain;
+
+        public DomainInfo Domain
+        {
+            get { return domain; }
+        }
+
+        public DomainInfoArgs (DomainInfo domain)
+        {
+            this.domain = domain;
+        }
+    }
+
+    public delegate void DomainInfoHandler (object o, DomainInfoArgs args);
+    
+    public class DomainBrowser : BrowserBase, IDisposable
+    {
+        private IntPtr handle;
+        private ArrayList infos = new ArrayList ();
+        private Client client;
+        private int iface;
+        private Protocol proto;
+        private string domain;
+        private DomainBrowserType btype;
+        private LookupFlags flags;
+        private DomainBrowserCallback cb;
+
+        private ArrayList addListeners = new ArrayList ();
+        private ArrayList removeListeners = new ArrayList ();
+        
+        [DllImport ("avahi-client")]
+        private static extern IntPtr avahi_domain_browser_new (IntPtr client, int iface, int proto,
+                                                               byte[] domain, int btype, LookupFlags flags,
+                                                               DomainBrowserCallback cb,
+                                                               IntPtr userdata);
+
+        [DllImport ("avahi-client")]
+        private static extern void avahi_domain_browser_free (IntPtr handle);
+
+        public event DomainInfoHandler DomainAdded
+        {
+            add {
+                addListeners.Add (value);
+                Start ();
+            }
+            remove {
+                addListeners.Remove (value);
+                Stop (false);
+            }
+        }
+        
+        public event DomainInfoHandler DomainRemoved
+        {
+            add {
+                removeListeners.Add (value);
+                Start ();
+            }
+            remove {
+                removeListeners.Remove (value);
+                Stop (false);
+            }
+        }
+
+        public DomainInfo[] Domains
+        {
+            get { return (DomainInfo[]) infos.ToArray (typeof (DomainInfo)); }
+        }
+
+        public DomainBrowser (Client client) : this (client, -1, Protocol.Unspecified, client.DomainName,
+                                                     DomainBrowserType.Browse, LookupFlags.None) {
+        }
+        
+        public DomainBrowser (Client client, int iface, Protocol proto, string domain,
+                              DomainBrowserType btype, LookupFlags flags)
+        {
+            this.client = client;
+            this.iface = iface;
+            this.proto = proto;
+            this.domain = domain;
+            this.btype = btype;
+            this.flags = flags;
+            cb = OnDomainBrowserCallback;
+        }
+
+        ~DomainBrowser ()
+        {
+            Dispose ();
+        }
+
+        public void Dispose ()
+        {
+            Stop (true);
+        }
+
+        private void Start ()
+        {
+            if (client.Handle == IntPtr.Zero && handle != IntPtr.Zero ||
+                (addListeners.Count == 0 && removeListeners.Count == 0))
+                return;
+
+            lock (client) {
+                handle = avahi_domain_browser_new (client.Handle, iface, (int) proto,
+                                                   Utility.StringToBytes (domain), (int) btype, flags,
+                                                   cb, IntPtr.Zero);
+
+                if (handle == IntPtr.Zero)
+                    client.ThrowError ();
+            }
+        }
+
+        private void Stop (bool force)
+        {
+            if (client.Handle != IntPtr.Zero && handle != IntPtr.Zero &&
+                (force || (addListeners.Count == 0 && removeListeners.Count == 0))) {
+                lock (client) {
+                    avahi_domain_browser_free (handle);
+                    handle = IntPtr.Zero;
+                }
+            }
+        }
+
+        private void OnDomainBrowserCallback (IntPtr browser, int iface, Protocol proto, BrowserEvent bevent,
+                                              IntPtr domain, LookupResultFlags flags, IntPtr userdata)
+        {
+
+            DomainInfo info;
+            info.NetworkInterface = iface;
+            info.Protocol = proto;
+            info.Domain = Utility.PtrToString (domain);
+            info.Flags = flags;
+
+            switch (bevent) {
+            case BrowserEvent.Added:
+                infos.Add (info);
+
+                foreach (DomainInfoHandler handler in addListeners)
+                    handler (this, new DomainInfoArgs (info));
+                break;
+            case BrowserEvent.Removed:
+                infos.Remove (info);
+
+                foreach (DomainInfoHandler handler in removeListeners)
+                    handler (this, new DomainInfoArgs (info));
+                break;
+            default:
+                EmitBrowserEvent (bevent);
+                break;
+            }
+        }
+    }
+}