1 // DnsTest.cs - NUnit Test Cases for the System.Net.Dns class
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4 // Mads Pultz (mpultz@diku.dk)
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5 // Martin Willemoes Hansen (mwh@sysrq.dk)
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7 // (C) 2001 Mads Pultz
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8 // (C) 2003 Martin Willemoes Hansen
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14 using System.Net.Sockets;
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15 using System.Threading;
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17 using NUnit.Framework;
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19 namespace MonoTests.System.Net
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22 public class DnsTest
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24 private String site1Name = "google-public-dns-a.google.com",
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25 site1Dot = "8.8.8.8",
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26 site2Name = "google-public-dns-b.google.com",
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27 site2Dot = "8.8.4.4",
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28 noneExistingSite = "unlikely.xamarin.com";
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29 private uint site1IP = 134744072, site2IP = 134743044; // Big-Endian
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32 public void AsyncGetHostByName ()
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35 r = Dns.BeginGetHostByName (site1Name, new AsyncCallback (GetHostByNameCallback), null);
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37 IAsyncResult async = Dns.BeginGetHostByName (site1Name, null, null);
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38 IPHostEntry entry = Dns.EndGetHostByName (async);
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39 SubTestValidIPHostEntry (entry);
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40 Assert.IsTrue (entry.HostName == "google-public-dns-a.google.com");
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43 void GetHostByNameCallback (IAsyncResult ar)
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46 h = Dns.EndGetHostByName (ar);
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47 SubTestValidIPHostEntry (h);
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51 public void AsyncResolve ()
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54 r = Dns.BeginResolve (site1Name, new AsyncCallback (ResolveCallback), null);
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56 IAsyncResult async = Dns.BeginResolve (site1Dot, null, null);
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57 IPHostEntry entry = Dns.EndResolve (async);
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58 SubTestValidIPHostEntry (entry);
59 var ip = GetIPv4Address (entry);
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60 Assert.AreEqual (site1Dot, ip.ToString ());
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63 void ResolveCallback (IAsyncResult ar)
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65 IPHostEntry h = Dns.EndResolve (ar);
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66 SubTestValidIPHostEntry (h);
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70 public void BeginGetHostAddresses_HostNameOrAddress_Null ()
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73 Dns.BeginGetHostAddresses (
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75 new AsyncCallback (GetHostAddressesCallback),
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78 } catch (ArgumentNullException ex) {
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79 Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");
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80 Assert.IsNull (ex.InnerException, "#3");
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81 Assert.IsNotNull (ex.Message, "#4");
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82 Assert.AreEqual ("hostName", ex.ParamName, "#5");
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87 public void BeginGetHostAddresses_HostNameOrAddress_UnspecifiedAddress ()
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91 Dns.BeginGetHostAddresses (
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93 new AsyncCallback (GetHostAddressesCallback),
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95 Assert.Fail ("#A1");
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96 } catch (ArgumentException ex) {
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97 // IPv4 address 0.0.0.0 and IPv6 address ::0 are
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98 // unspecified addresses that cannot be used as
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100 Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#A2");
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101 Assert.IsNull (ex.InnerException, "#A3");
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102 Assert.IsNotNull (ex.Message, "#A4");
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103 Assert.AreEqual ("hostNameOrAddress", ex.ParamName, "#A5");
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108 Dns.BeginGetHostAddresses (
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110 new AsyncCallback (GetHostAddressesCallback),
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112 Assert.Fail ("#B1");
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113 } catch (ArgumentException ex) {
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114 // IPv4 address 0.0.0.0 and IPv6 address ::0 are
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115 // unspecified addresses that cannot be used as
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116 // a target address
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117 Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#B2");
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118 Assert.IsNull (ex.InnerException, "#B3");
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119 Assert.IsNotNull (ex.Message, "#B4");
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120 Assert.AreEqual ("hostNameOrAddress", ex.ParamName, "#B5");
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124 void GetHostAddressesCallback (IAsyncResult ar)
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126 IPAddress [] addresses = Dns.EndGetHostAddresses (ar);
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127 Assert.IsNotNull (addresses);
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131 public void GetHostAddresses_HostNameOrAddress_Null ()
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134 Dns.GetHostAddresses ((string) null);
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135 Assert.Fail ("#1");
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136 } catch (ArgumentNullException ex) {
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137 Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");
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138 Assert.IsNull (ex.InnerException, "#3");
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139 Assert.IsNotNull (ex.Message, "#4");
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140 Assert.AreEqual ("hostNameOrAddress", ex.ParamName, "#5");
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145 public void GetHostAddresses_HostNameOrAddress_UnspecifiedAddress ()
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149 Dns.GetHostAddresses ("0.0.0.0");
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150 Assert.Fail ("#A1");
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151 } catch (ArgumentException ex) {
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152 // IPv4 address 0.0.0.0 and IPv6 address ::0 are
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153 // unspecified addresses that cannot be used as
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154 // a target address
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155 Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#A2");
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156 Assert.IsNull (ex.InnerException, "#A3");
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157 Assert.IsNotNull (ex.Message, "#A4");
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158 Assert.AreEqual ("hostNameOrAddress", ex.ParamName, "#A5");
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163 Dns.GetHostAddresses ("::0");
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164 Assert.Fail ("#B1");
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165 } catch (ArgumentException ex) {
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166 // IPv4 address 0.0.0.0 and IPv6 address ::0 are
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167 // unspecified addresses that cannot be used as
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168 // a target address
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169 Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#B2");
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170 Assert.IsNull (ex.InnerException, "#B3");
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171 Assert.IsNotNull (ex.Message, "#B4");
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172 Assert.AreEqual ("hostNameOrAddress", ex.ParamName, "#B5");
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177 public void GetHostName ()
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179 string hostName = Dns.GetHostName ();
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180 Assert.IsNotNull (hostName);
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184 public void GetHostByName ()
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186 SubTestGetHostByName (site1Name, site1Dot);
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187 SubTestGetHostByName (site2Name, site2Dot);
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189 var entry = Dns.GetHostByName (noneExistingSite);
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191 * Work around broken t-online.de DNS Server.
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193 * T-Online's DNS Server for DSL Customers resolves
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194 * non-exisitng domain names to
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195 * http://navigationshilfe1.t-online.de/dnserror?url=....
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196 * instead of reporting an error.
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198 var navigationshilfe1 = IPAddress.Parse ("80.156.86.78");
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199 var navigationshilfe2 = IPAddress.Parse ("62.157.140.133");
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200 foreach (var addr in entry.AddressList) {
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201 if (addr.Equals (navigationshilfe1) || addr.Equals (navigationshilfe2))
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204 Assert.Fail ("Should raise a SocketException (assuming that '" + noneExistingSite + "' does not exist)");
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205 } catch (SocketException) {
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209 static IPAddress GetIPv4Address (IPHostEntry h)
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211 var al = h.AddressList.FirstOrDefault (x => x.AddressFamily == AddressFamily.InterNetwork);
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213 Assert.Ignore ("Could not resolve an IPv4 address as required by this test case, e.g. running on an IPv6 only network");
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217 void SubTestGetHostByName (string siteName, string siteDot)
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219 IPHostEntry h = Dns.GetHostByName (siteName);
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220 SubTestValidIPHostEntry (h);
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221 Assert.AreEqual (siteName, h.HostName, "siteName");
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222 var ip = GetIPv4Address (h);
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223 Assert.AreEqual (siteDot, ip.ToString (), "siteDot");
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227 public void GetHostByName_HostName_Null ()
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230 Dns.GetHostByName ((string) null);
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231 Assert.Fail ("#1");
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232 } catch (ArgumentNullException ex) {
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233 Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");
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234 Assert.IsNull (ex.InnerException, "#3");
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235 Assert.IsNotNull (ex.Message, "#4");
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236 Assert.AreEqual ("hostName", ex.ParamName, "#5");
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241 public void GetHostByAddressString_Address_Null ()
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244 Dns.GetHostByAddress ((string) null);
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245 Assert.Fail ("#1");
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246 } catch (ArgumentNullException ex) {
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247 Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");
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248 Assert.IsNull (ex.InnerException, "#3");
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249 Assert.IsNotNull (ex.Message, "#4");
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250 Assert.AreEqual ("address", ex.ParamName, "#5");
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255 [ExpectedException (typeof (SocketException))]
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256 public void GetHostByAddressString2 ()
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258 Dns.GetHostByAddress ("123.255.23");
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262 [ExpectedException (typeof (FormatException))]
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263 public void GetHostByAddressString3 ()
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265 Dns.GetHostByAddress ("123.256.34.10");
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268 [Test, ExpectedException (typeof (FormatException))]
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269 public void GetHostByAddressString4 ()
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271 Dns.GetHostByAddress ("not an IP address");
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275 public void GetHostByAddressString5 ()
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277 Dns.GetHostByAddress (site1Dot);
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281 public void GetHostByAddressIPAddress_Address_Null ()
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284 Dns.GetHostByAddress ((IPAddress) null);
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285 Assert.Fail ("#1");
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286 } catch (ArgumentNullException ex) {
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287 Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");
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288 Assert.IsNull (ex.InnerException, "#3");
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289 Assert.IsNotNull (ex.Message, "#4");
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290 Assert.AreEqual ("address", ex.ParamName, "#5");
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295 public void GetHostByAddressIPAddress2 ()
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297 IPAddress addr = new IPAddress (IPAddress.NetworkToHostOrder ((int) site1IP));
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298 IPHostEntry h = Dns.GetHostByAddress (addr);
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299 SubTestValidIPHostEntry (h);
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300 var ip = GetIPv4Address (h);
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301 Assert.AreEqual (addr.ToString (), ip.ToString ());
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305 public void GetHostByAddressIPAddress3 ()
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307 IPAddress addr = new IPAddress (IPAddress.NetworkToHostOrder ((int) site2IP));
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308 IPHostEntry h = Dns.GetHostByAddress (addr);
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309 SubTestValidIPHostEntry (h);
310 var ip = GetIPv4Address (h);
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311 Assert.AreEqual (addr.ToString (), ip.ToString ());
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315 public void BeginResolve_HostName_Null ()
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318 Dns.BeginResolve ((string) null,
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319 new AsyncCallback (ResolveCallback),
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321 Assert.Fail ("#1");
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322 } catch (ArgumentNullException ex) {
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323 Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");
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324 Assert.IsNull (ex.InnerException, "#3");
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325 Assert.IsNotNull (ex.Message, "#4");
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326 Assert.AreEqual ("hostName", ex.ParamName, "#5");
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331 public void Resolve ()
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333 SubTestResolve (site1Name);
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334 SubTestResolve (site2Name);
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335 SubTestResolve (site1Dot);
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336 SubTestResolve (site2Dot);
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339 void SubTestResolve (string addr)
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341 IPHostEntry h = Dns.Resolve (addr);
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342 SubTestValidIPHostEntry (h);
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346 public void Resolve_HostName_Null ()
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349 Dns.Resolve ((string) null);
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350 Assert.Fail ("#1");
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351 } catch (ArgumentNullException ex) {
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352 Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");
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353 Assert.IsNull (ex.InnerException, "#3");
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354 Assert.IsNotNull (ex.Message, "#4");
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355 Assert.AreEqual ("hostName", ex.ParamName, "#5");
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359 [Test] // BeginGetHostEntry (IPAddress, AsyncCallback, Object)
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360 public void BeginGetHostEntry1_Address_Null ()
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363 Dns.BeginGetHostEntry (
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365 new AsyncCallback (GetHostAddressesCallback),
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367 Assert.Fail ("#1");
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368 } catch (ArgumentNullException ex) {
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369 Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");
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370 Assert.IsNull (ex.InnerException, "#3");
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371 Assert.IsNotNull (ex.Message, "#4");
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372 Assert.AreEqual ("address", ex.ParamName, "#5");
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376 [Test] // BeginGetHostEntry (String, AsyncCallback, Object)
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377 public void BeginGetHostEntry2_HostNameOrAddress_Null ()
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380 Dns.BeginGetHostEntry (
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382 new AsyncCallback (GetHostAddressesCallback),
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384 Assert.Fail ("#1");
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385 } catch (ArgumentNullException ex) {
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386 Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");
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387 Assert.IsNull (ex.InnerException, "#3");
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388 Assert.IsNotNull (ex.Message, "#4");
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389 Assert.AreEqual ("hostName", ex.ParamName, "#5");
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393 [Test] // BeginGetHostEntry (String, AsyncCallback, Object)
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394 public void BeginGetHostEntry2_HostNameOrAddress_UnspecifiedAddress ()
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398 Dns.BeginGetHostEntry (
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400 new AsyncCallback (GetHostEntryCallback),
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402 Assert.Fail ("#1");
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403 } catch (ArgumentException ex) {
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404 // IPv4 address 0.0.0.0 and IPv6 address ::0 are
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405 // unspecified addresses that cannot be used as
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406 // a target address
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407 Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#2");
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408 Assert.IsNull (ex.InnerException, "#3");
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409 Assert.IsNotNull (ex.Message, "#4");
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410 Assert.AreEqual ("hostNameOrAddress", ex.ParamName, "#5");
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415 Dns.BeginGetHostEntry (
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417 new AsyncCallback (GetHostEntryCallback),
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419 Assert.Fail ("#1");
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420 } catch (ArgumentException ex) {
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421 // IPv4 address 0.0.0.0 and IPv6 address ::0 are
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422 // unspecified addresses that cannot be used as
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423 // a target address
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424 Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#2");
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425 Assert.IsNull (ex.InnerException, "#3");
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426 Assert.IsNotNull (ex.Message, "#4");
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427 Assert.AreEqual ("hostNameOrAddress", ex.ParamName, "#5");
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431 void GetHostEntryCallback (IAsyncResult ar)
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433 IPHostEntry hostEntry = Dns.EndGetHostEntry (ar);
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434 Assert.IsNotNull (hostEntry);
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437 [Test] // GetHostEntry (IPAddress)
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438 public void GetHostEntry1_Address_Null ()
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441 Dns.GetHostEntry ((IPAddress) null);
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442 Assert.Fail ("#1");
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443 } catch (ArgumentNullException ex) {
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444 Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");
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445 Assert.IsNull (ex.InnerException, "#3");
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446 Assert.IsNotNull (ex.Message, "#4");
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447 Assert.AreEqual ("address", ex.ParamName, "#5");
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451 [Test] // GetHostEntry (String)
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452 public void GetHostEntry2 ()
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454 Dns.GetHostEntry (site1Name); // hostname
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455 Dns.GetHostEntry (site1Dot); // IP address
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458 [Test] // GetHostEntry (String)
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459 public void GetHostEntry2_HostNameOrAddress_Null ()
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462 Dns.GetHostEntry ((string) null);
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463 Assert.Fail ("#1");
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464 } catch (ArgumentNullException ex) {
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465 Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");
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466 Assert.IsNull (ex.InnerException, "#3");
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467 Assert.IsNotNull (ex.Message, "#4");
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468 Assert.AreEqual ("hostNameOrAddress", ex.ParamName, "#5");
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472 [Test] // GetHostEntry (String)
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473 public void GetHostEntry2_HostNameOrAddress_UnspecifiedAddress ()
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477 Dns.GetHostEntry ("0.0.0.0");
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478 Assert.Fail ("#A1");
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479 } catch (ArgumentException ex) {
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480 // IPv4 address 0.0.0.0 and IPv6 address ::0 are
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481 // unspecified addresses that cannot be used as
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482 // a target address
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483 Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#A2");
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484 Assert.IsNull (ex.InnerException, "#A3");
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485 Assert.IsNotNull (ex.Message, "#A4");
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486 Assert.AreEqual ("hostNameOrAddress", ex.ParamName, "#A5");
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491 Dns.GetHostEntry ("::0");
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492 Assert.Fail ("#B1");
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493 } catch (ArgumentException ex) {
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494 // IPv4 address 0.0.0.0 and IPv6 address ::0 are
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495 // unspecified addresses that cannot be used as
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496 // a target address
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497 Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#B2");
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498 Assert.IsNull (ex.InnerException, "#B3");
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499 Assert.IsNotNull (ex.Message, "#B4");
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500 Assert.AreEqual ("hostNameOrAddress", ex.ParamName, "#B5");
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504 void SubTestValidIPHostEntry (IPHostEntry h)
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506 Assert.IsNotNull (h.HostName, "HostName not null");
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507 Assert.IsNotNull (h.AddressList, "AddressList not null");
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508 Assert.IsTrue (h.AddressList.Length > 0, "AddressList.Length");
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512 public void GetHostEntry_StringEmpty ()
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514 Dns.GetHostEntry (string.Empty);
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517 /* This isn't used anymore, but could be useful for debugging
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518 static void printIPHostEntry(IPHostEntry h)
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520 Console.WriteLine("----------------------------------------------------");
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521 Console.WriteLine("Host name:");
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522 Console.WriteLine(h.HostName);
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523 Console.WriteLine("IP addresses:");
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524 IPAddress[] list = h.AddressList;
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525 for(int i = 0; i < list.Length; ++i)
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526 Console.WriteLine(list[i]);
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527 Console.WriteLine("Aliases:");
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528 string[] aliases = h.Aliases;
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529 for(int i = 0; i < aliases.Length; ++i)
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530 Console.WriteLine(aliases[i]);
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531 Console.WriteLine("----------------------------------------------------");
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