1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
/***
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;
}
}
}
}
|
