Mono.Zeroconf – Blame information for rev 2
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1 | office | 1 | // |
2 | // ServiceBrowser.cs |
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3 | // |
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4 | // Authors: |
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5 | // Aaron Bockover <abockover@novell.com> |
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6 | // |
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7 | // Copyright (C) 2006-2007 Novell, Inc (http://www.novell.com) |
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8 | // |
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9 | // Permission is hereby granted, free of charge, to any person obtaining |
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10 | // a copy of this software and associated documentation files (the |
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11 | // "Software"), to deal in the Software without restriction, including |
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12 | // without limitation the rights to use, copy, modify, merge, publish, |
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13 | // distribute, sublicense, and/or sell copies of the Software, and to |
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14 | // permit persons to whom the Software is furnished to do so, subject to |
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15 | // the following conditions: |
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16 | // |
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17 | // The above copyright notice and this permission notice shall be |
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18 | // included in all copies or substantial portions of the Software. |
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19 | // |
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20 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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21 | // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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22 | // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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23 | // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE |
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24 | // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
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25 | // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
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26 | // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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27 | // |
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28 | |||
29 | using System; |
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30 | using System.Collections; |
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31 | using System.Collections.Generic; |
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32 | using System.Threading; |
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33 | |||
34 | namespace Mono.Zeroconf.Providers.Bonjour |
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35 | { |
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36 | public class ServiceBrowseEventArgs : Mono.Zeroconf.ServiceBrowseEventArgs |
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37 | { |
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38 | private bool more_coming; |
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39 | |||
40 | public ServiceBrowseEventArgs(BrowseService service, bool moreComing) : base(service) |
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41 | { |
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42 | this.more_coming = moreComing; |
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43 | } |
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44 | |||
45 | public bool MoreComing { |
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46 | get { return more_coming; } |
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47 | } |
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48 | } |
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49 | |||
50 | public class ServiceBrowser : IServiceBrowser, IDisposable |
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51 | { |
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52 | private uint interface_index; |
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53 | private AddressProtocol address_protocol; |
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54 | private string regtype; |
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55 | private string domain; |
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56 | |||
57 | private ServiceRef sd_ref = ServiceRef.Zero; |
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58 | private Dictionary<string, IResolvableService> service_table = new Dictionary<string, IResolvableService> (); |
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59 | |||
60 | private Native.DNSServiceBrowseReply browse_reply_handler; |
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61 | |||
62 | private Thread thread; |
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63 | |||
64 | public event ServiceBrowseEventHandler ServiceAdded; |
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65 | public event ServiceBrowseEventHandler ServiceRemoved; |
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66 | |||
67 | public ServiceBrowser() |
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68 | { |
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69 | browse_reply_handler = new Native.DNSServiceBrowseReply(OnBrowseReply); |
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70 | } |
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71 | |||
72 | public void Browse (uint interfaceIndex, AddressProtocol addressProtocol, string regtype, string domain) |
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73 | { |
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74 | Configure(interfaceIndex, addressProtocol, regtype, domain); |
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75 | StartAsync(); |
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76 | } |
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77 | |||
78 | public void Configure(uint interfaceIndex, AddressProtocol addressProtocol, string regtype, string domain) |
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79 | { |
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80 | this.interface_index = interfaceIndex; |
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81 | this.address_protocol = addressProtocol; |
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82 | this.regtype = regtype; |
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83 | this.domain = domain; |
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84 | |||
85 | if(regtype == null) { |
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86 | throw new ArgumentNullException("regtype"); |
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87 | } |
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88 | } |
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89 | |||
90 | private void Start(bool @async) |
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91 | { |
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92 | if(thread != null) { |
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93 | throw new InvalidOperationException("ServiceBrowser is already started"); |
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94 | } |
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95 | |||
96 | if(@async) { |
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97 | thread = new Thread(new ThreadStart(ThreadedStart)); |
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98 | thread.IsBackground = true; |
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99 | thread.Start(); |
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100 | } else { |
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101 | ProcessStart(); |
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102 | } |
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103 | } |
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104 | |||
105 | public void Start() |
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106 | { |
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107 | Start(false); |
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108 | } |
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109 | |||
110 | public void StartAsync() |
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111 | { |
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112 | Start(true); |
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113 | } |
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114 | |||
115 | private void ThreadedStart() |
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116 | { |
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117 | try { |
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118 | ProcessStart(); |
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119 | } catch(ThreadAbortException) { |
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120 | Thread.ResetAbort(); |
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121 | } |
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122 | |||
123 | thread = null; |
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124 | } |
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125 | |||
126 | private void ProcessStart() |
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127 | { |
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128 | ServiceError error = Native.DNSServiceBrowse(out sd_ref, ServiceFlags.Default, |
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129 | interface_index, regtype, domain, browse_reply_handler, IntPtr.Zero); |
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130 | |||
131 | if(error != ServiceError.NoError) { |
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132 | throw new ServiceErrorException(error); |
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133 | } |
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134 | |||
135 | sd_ref.Process(); |
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136 | } |
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137 | |||
138 | public void Stop() |
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139 | { |
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140 | if(sd_ref != ServiceRef.Zero) { |
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141 | sd_ref.Deallocate(); |
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142 | sd_ref = ServiceRef.Zero; |
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143 | } |
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144 | |||
145 | if(thread != null) { |
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146 | thread.Abort(); |
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147 | thread = null; |
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148 | } |
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149 | } |
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150 | |||
151 | public void Dispose() |
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152 | { |
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153 | Stop(); |
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154 | } |
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155 | |||
156 | public IEnumerator<IResolvableService> GetEnumerator () |
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157 | { |
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158 | lock (this) { |
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159 | foreach (IResolvableService service in service_table.Values) { |
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160 | yield return service; |
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161 | } |
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162 | } |
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163 | } |
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164 | |||
165 | System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator () |
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166 | { |
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167 | return GetEnumerator (); |
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168 | } |
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169 | |||
2 | office | 170 | private void OnBrowseReply(ServiceRef sdRef, ServiceFlags flags, uint interfaceIndex, ServiceError errorCode, |
171 | IntPtr serviceName, string regtype, string replyDomain, IntPtr context) |
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1 | office | 172 | { |
2 | office | 173 | string name = Native.Utf8toString(serviceName); |
1 | office | 174 | BrowseService service = new BrowseService(); |
175 | service.Flags = flags; |
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2 | office | 176 | service.Name = name; |
1 | office | 177 | service.RegType = regtype; |
178 | service.ReplyDomain = replyDomain; |
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179 | service.InterfaceIndex = interfaceIndex; |
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180 | service.AddressProtocol = address_protocol; |
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181 | |||
182 | ServiceBrowseEventArgs args = new ServiceBrowseEventArgs( |
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183 | service, (flags & ServiceFlags.MoreComing) != 0); |
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184 | |||
185 | if((flags & ServiceFlags.Add) != 0) { |
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186 | lock (service_table) { |
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2 | office | 187 | if (service_table.ContainsKey (name)) { |
188 | service_table[name] = service; |
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1 | office | 189 | } else { |
2 | office | 190 | service_table.Add(name, service); |
1 | office | 191 | } |
192 | } |
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193 | |||
194 | ServiceBrowseEventHandler handler = ServiceAdded; |
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195 | if(handler != null) { |
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196 | handler(this, args); |
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197 | } |
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198 | } else { |
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199 | lock (service_table) { |
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2 | office | 200 | if (service_table.ContainsKey (name)) { |
201 | service_table.Remove (name); |
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1 | office | 202 | } |
203 | } |
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204 | |||
205 | ServiceBrowseEventHandler handler = ServiceRemoved; |
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206 | if(handler != null) { |
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207 | handler(this, args); |
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208 | } |
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209 | } |
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210 | } |
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211 | } |
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212 | } |