// System.Net.Dns.cs
//
+// Authors:
+// Mads Pultz (mpultz@diku.dk)
+// Lawrence Pit (loz@cable.a2000.nl)
+
// Author: Mads Pultz (mpultz@diku.dk)
-// Author: Lawrence Pit (loz@cable.a2000.nl)
+// Lawrence Pit (loz@cable.a2000.nl)
+// Marek Safar (marek.safar@gmail.com)
+// Gonzalo Paniagua Javier (gonzalo.mono@gmail.com)
//
// (C) Mads Pultz, 2001
+// Copyright (c) 2011 Novell, Inc.
+// Copyright (c) 2011 Xamarin, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining
using System.Threading;
using System.Runtime.CompilerServices;
using System.Runtime.Remoting.Messaging;
+#if NET_4_5
+using System.Threading.Tasks;
+#endif
+
+#if !MOBILE
+using Mono.Net.Dns;
+#endif
namespace System.Net {
-#if NET_2_0
public static class Dns {
-#else
- public sealed class Dns {
-
- private Dns () {}
+#if !MOBILE
+ static bool use_mono_dns;
+ static SimpleResolver resolver;
#endif
static Dns ()
{
System.Net.Sockets.Socket.CheckProtocolSupport();
+
+#if !MOBILE
+ if (Environment.GetEnvironmentVariable ("MONO_DNS") != null) {
+ resolver = new SimpleResolver ();
+ use_mono_dns = true;
+ }
+#endif
}
-#if !NET_2_1 // global remove of async methods
+#if !MOBILE
+ internal static bool UseMonoDns {
+ get { return use_mono_dns; }
+ }
+#endif
private delegate IPHostEntry GetHostByNameCallback (string hostName);
private delegate IPHostEntry ResolveCallback (string hostName);
-#if NET_2_0
private delegate IPHostEntry GetHostEntryNameCallback (string hostName);
private delegate IPHostEntry GetHostEntryIPCallback (IPAddress hostAddress);
private delegate IPAddress [] GetHostAddressesCallback (string hostName);
+
+#if !MOBILE
+ static void OnCompleted (object sender, SimpleResolverEventArgs e)
+ {
+ DnsAsyncResult ares = (DnsAsyncResult) e.UserToken;
+ IPHostEntry entry = e.HostEntry;
+ if (entry == null || e.ResolverError != 0) {
+ ares.SetCompleted (false, new Exception ("Error: " + e.ResolverError));
+ return;
+ }
+ ares.SetCompleted (false, entry);
+ }
+
+ static IAsyncResult BeginAsyncCallAddresses (string host, AsyncCallback callback, object state)
+ {
+ SimpleResolverEventArgs e = new SimpleResolverEventArgs ();
+ e.Completed += OnCompleted;
+ e.HostName = host;
+ DnsAsyncResult ares = new DnsAsyncResult (callback, state);
+ e.UserToken = ares;
+ if (resolver.GetHostAddressesAsync (e) == false)
+ ares.SetCompleted (true, e.HostEntry); // Completed synchronously
+ return ares;
+ }
+
+ static IAsyncResult BeginAsyncCall (string host, AsyncCallback callback, object state)
+ {
+ SimpleResolverEventArgs e = new SimpleResolverEventArgs ();
+ e.Completed += OnCompleted;
+ e.HostName = host;
+ DnsAsyncResult ares = new DnsAsyncResult (callback, state);
+ e.UserToken = ares;
+ if (resolver.GetHostEntryAsync (e) == false)
+ ares.SetCompleted (true, e.HostEntry); // Completed synchronously
+ return ares;
+ }
+
+ static IPHostEntry EndAsyncCall (DnsAsyncResult ares)
+ {
+ if (ares == null)
+ throw new ArgumentException ("Invalid asyncResult");
+ if (!ares.IsCompleted)
+ ares.AsyncWaitHandle.WaitOne ();
+ if (ares.Exception != null)
+ throw ares.Exception;
+ IPHostEntry entry = ares.HostEntry;
+ if (entry == null || entry.AddressList == null || entry.AddressList.Length == 0)
+ Error_11001 (entry.HostName);
+ return entry;
+ }
#endif
-#if NET_2_0
[Obsolete ("Use BeginGetHostEntry instead")]
-#endif
- public static IAsyncResult BeginGetHostByName (string hostName,
- AsyncCallback requestCallback, object stateObject)
+ public static IAsyncResult BeginGetHostByName (string hostName, AsyncCallback requestCallback, object stateObject)
{
if (hostName == null)
throw new ArgumentNullException ("hostName");
+#if !MOBILE
+ if (use_mono_dns)
+ return BeginAsyncCall (hostName, requestCallback, stateObject);
+#endif
+
GetHostByNameCallback c = new GetHostByNameCallback (GetHostByName);
return c.BeginInvoke (hostName, requestCallback, stateObject);
}
-#if NET_2_0
[Obsolete ("Use BeginGetHostEntry instead")]
-#endif
- public static IAsyncResult BeginResolve (string hostName,
- AsyncCallback requestCallback, object stateObject)
+ public static IAsyncResult BeginResolve (string hostName, AsyncCallback requestCallback, object stateObject)
{
if (hostName == null)
throw new ArgumentNullException ("hostName");
+#if !MOBILE
+ if (use_mono_dns)
+ return BeginAsyncCall (hostName, requestCallback, stateObject);
+#endif
+
ResolveCallback c = new ResolveCallback (Resolve);
return c.BeginInvoke (hostName, requestCallback, stateObject);
}
-#if NET_2_0
- public static IAsyncResult BeginGetHostAddresses (string hostName,
- AsyncCallback requestCallback, object stateObject)
+ public static IAsyncResult BeginGetHostAddresses (string hostNameOrAddress, AsyncCallback requestCallback, object state)
{
- if (hostName == null)
+ if (hostNameOrAddress == null)
throw new ArgumentNullException ("hostName");
+ if (hostNameOrAddress == "0.0.0.0" || hostNameOrAddress == "::0")
+ throw new ArgumentException ("Addresses 0.0.0.0 (IPv4) " +
+ "and ::0 (IPv6) are unspecified addresses. You " +
+ "cannot use them as target address.",
+ "hostNameOrAddress");
+
+#if !MOBILE
+ if (use_mono_dns)
+ return BeginAsyncCallAddresses (hostNameOrAddress, requestCallback, state);
+#endif
GetHostAddressesCallback c = new GetHostAddressesCallback (GetHostAddresses);
- return c.BeginInvoke (hostName, requestCallback, stateObject);
+ return c.BeginInvoke (hostNameOrAddress, requestCallback, state);
}
- public static IAsyncResult BeginGetHostEntry (string hostNameOrAddress,
- AsyncCallback requestCallback, object stateObject)
+ public static IAsyncResult BeginGetHostEntry (string hostNameOrAddress, AsyncCallback requestCallback, object stateObject)
{
if (hostNameOrAddress == null)
- throw new ArgumentNullException ("hostNameOrAddress");
+ throw new ArgumentNullException ("hostName");
+ if (hostNameOrAddress == "0.0.0.0" || hostNameOrAddress == "::0")
+ throw new ArgumentException ("Addresses 0.0.0.0 (IPv4) " +
+ "and ::0 (IPv6) are unspecified addresses. You " +
+ "cannot use them as target address.",
+ "hostNameOrAddress");
+
+#if !MOBILE
+ if (use_mono_dns)
+ return BeginAsyncCall (hostNameOrAddress, requestCallback, stateObject);
+#endif
GetHostEntryNameCallback c = new GetHostEntryNameCallback (GetHostEntry);
return c.BeginInvoke (hostNameOrAddress, requestCallback, stateObject);
}
- public static IAsyncResult BeginGetHostEntry (IPAddress hostAddress,
- AsyncCallback requestCallback, object stateObject)
+ public static IAsyncResult BeginGetHostEntry (IPAddress address, AsyncCallback requestCallback, object stateObject)
{
- if (hostAddress == null)
- throw new ArgumentNullException ("hostAddress");
+ if (address == null)
+ throw new ArgumentNullException ("address");
+
+#if !MOBILE
+ if (use_mono_dns)
+ return BeginAsyncCall (address.ToString (), requestCallback, stateObject);
+#endif
GetHostEntryIPCallback c = new GetHostEntryIPCallback (GetHostEntry);
- return c.BeginInvoke (hostAddress, requestCallback, stateObject);
+ return c.BeginInvoke (address, requestCallback, stateObject);
}
-#endif
-#if NET_2_0
[Obsolete ("Use EndGetHostEntry instead")]
-#endif
public static IPHostEntry EndGetHostByName (IAsyncResult asyncResult)
{
if (asyncResult == null)
throw new ArgumentNullException ("asyncResult");
+#if !MOBILE
+ if (use_mono_dns)
+ return EndAsyncCall (asyncResult as DnsAsyncResult);
+#endif
+
AsyncResult async = (AsyncResult) asyncResult;
GetHostByNameCallback cb = (GetHostByNameCallback) async.AsyncDelegate;
return cb.EndInvoke(asyncResult);
}
-#if NET_2_0
[Obsolete ("Use EndGetHostEntry instead")]
-#endif
public static IPHostEntry EndResolve (IAsyncResult asyncResult)
{
if (asyncResult == null)
throw new ArgumentNullException ("asyncResult");
+
+#if !MOBILE
+ if (use_mono_dns)
+ return EndAsyncCall (asyncResult as DnsAsyncResult);
+#endif
+
AsyncResult async = (AsyncResult) asyncResult;
ResolveCallback cb = (ResolveCallback) async.AsyncDelegate;
return cb.EndInvoke(asyncResult);
}
-#if NET_2_0
-
public static IPAddress [] EndGetHostAddresses (IAsyncResult asyncResult)
{
if (asyncResult == null)
throw new ArgumentNullException ("asyncResult");
+#if !MOBILE
+ if (use_mono_dns) {
+ IPHostEntry entry = EndAsyncCall (asyncResult as DnsAsyncResult);
+ if (entry == null)
+ return null;
+ return entry.AddressList;
+ }
+#endif
+
AsyncResult async = (AsyncResult) asyncResult;
GetHostAddressesCallback cb = (GetHostAddressesCallback) async.AsyncDelegate;
return cb.EndInvoke(asyncResult);
{
if (asyncResult == null)
throw new ArgumentNullException ("asyncResult");
+
+#if !MOBILE
+ if (use_mono_dns)
+ return EndAsyncCall (asyncResult as DnsAsyncResult);
+#endif
+
AsyncResult async = (AsyncResult) asyncResult;
-#if NET_2_0
if (async.AsyncDelegate is GetHostEntryIPCallback)
return ((GetHostEntryIPCallback) async.AsyncDelegate).EndInvoke (asyncResult);
-#endif
GetHostEntryNameCallback cb = (GetHostEntryNameCallback) async.AsyncDelegate;
return cb.EndInvoke(asyncResult);
}
-#endif
-
-#endif // !NET_2_1: global remove of async methods
+
#if !TARGET_JVM
[MethodImplAttribute(MethodImplOptions.InternalCall)]
private extern static bool GetHostName_internal(out string h_name);
#endif
- private static IPHostEntry hostent_to_IPHostEntry(string h_name, string[] h_aliases, string[] h_addrlist)
+ static void Error_11001 (string hostName)
+ {
+ throw new SocketException(11001, string.Format ("Could not resolve host '{0}'", hostName));
+
+ }
+
+ private static IPHostEntry hostent_to_IPHostEntry(string originalHostName, string h_name, string[] h_aliases, string[] h_addrlist)
{
IPHostEntry he = new IPHostEntry();
ArrayList addrlist = new ArrayList();
}
if(addrlist.Count == 0)
- throw new SocketException(11001);
+ Error_11001 (originalHostName);
he.AddressList = addrlist.ToArray(typeof(IPAddress)) as IPAddress[];
return he;
}
-#if NET_2_0
[Obsolete ("Use GetHostEntry instead")]
-#endif
public static IPHostEntry GetHostByAddress(IPAddress address)
{
if (address == null)
return GetHostByAddressFromString (address.ToString (), false);
}
-#if NET_2_0
[Obsolete ("Use GetHostEntry instead")]
-#endif
public static IPHostEntry GetHostByAddress(string address)
{
if (address == null)
#else
bool ret = GetHostByAddr_internal(address, out h_name, out h_aliases, out h_addrlist);
if (!ret)
- throw new SocketException(11001);
+ Error_11001 (address);
#endif
- return (hostent_to_IPHostEntry (h_name, h_aliases, h_addrlist));
+ return (hostent_to_IPHostEntry (address, h_name, h_aliases, h_addrlist));
}
-#if NET_2_0
public static IPHostEntry GetHostEntry (string hostNameOrAddress)
{
if (hostNameOrAddress == null)
throw new ArgumentNullException ("hostNameOrAddress");
+ if (hostNameOrAddress == "0.0.0.0" || hostNameOrAddress == "::0")
+ throw new ArgumentException ("Addresses 0.0.0.0 (IPv4) " +
+ "and ::0 (IPv6) are unspecified addresses. You " +
+ "cannot use them as target address.",
+ "hostNameOrAddress");
- if (hostNameOrAddress == "0.0.0.0" || hostNameOrAddress == "")
- hostNameOrAddress = "127.0.0.1";
IPAddress addr;
- if (IPAddress.TryParse (hostNameOrAddress, out addr))
+ if (hostNameOrAddress.Length > 0 && IPAddress.TryParse (hostNameOrAddress, out addr))
return GetHostEntry (addr);
- else
- return GetHostByName (hostNameOrAddress);
+
+ return GetHostByName (hostNameOrAddress);
}
public static IPHostEntry GetHostEntry (IPAddress address)
if (hostNameOrAddress == null)
throw new ArgumentNullException ("hostNameOrAddress");
- if (hostNameOrAddress == "0.0.0.0" || hostNameOrAddress == "")
- hostNameOrAddress = "127.0.0.1";
+ if (hostNameOrAddress == "0.0.0.0" || hostNameOrAddress == "::0")
+ throw new ArgumentException ("Addresses 0.0.0.0 (IPv4) " +
+ "and ::0 (IPv6) are unspecified addresses. You " +
+ "cannot use them as target address.",
+ "hostNameOrAddress");
IPAddress addr;
- if (IPAddress.TryParse (hostNameOrAddress, out addr))
- {
+ if (hostNameOrAddress.Length > 0 && IPAddress.TryParse (hostNameOrAddress, out addr))
return new IPAddress[1] { addr };
- }
- else
- {
-
- return GetHostEntry (hostNameOrAddress).AddressList;
- }
+
+ return GetHostEntry (hostNameOrAddress).AddressList;
}
-#endif
-#if NET_2_0
[Obsolete ("Use GetHostEntry instead")]
-#endif
public static IPHostEntry GetHostByName (string hostName)
{
if (hostName == null)
- throw new ArgumentNullException ();
+ throw new ArgumentNullException ("hostName");
#if TARGET_JVM
if (hostName.Length == 0)
hostName = "localhost";
string h_name;
string[] h_aliases, h_addrlist;
- bool ret = GetHostByName_internal(hostName, out h_name,
- out h_aliases,
- out h_addrlist);
+ bool ret = GetHostByName_internal(hostName, out h_name, out h_aliases, out h_addrlist);
if (ret == false)
- throw new SocketException(11001);
+ Error_11001 (hostName);
- return(hostent_to_IPHostEntry(h_name, h_aliases,
- h_addrlist));
+ return(hostent_to_IPHostEntry(hostName, h_name, h_aliases, h_addrlist));
#endif
}
bool ret = GetHostName_internal(out hostName);
if (ret == false)
- throw new SocketException(11001);
+ Error_11001 (hostName);
return hostName;
#endif
}
-#if NET_2_0
[Obsolete ("Use GetHostEntry instead")]
-#endif
public static IPHostEntry Resolve(string hostName)
{
if (hostName == null)
return ret;
}
+
+#if NET_4_5
+ public static Task<IPAddress[]> GetHostAddressesAsync (string hostNameOrAddress)
+ {
+ return Task<IPAddress[]>.Factory.FromAsync (BeginGetHostAddresses, EndGetHostAddresses, hostNameOrAddress, null);
+ }
+
+ public static Task<IPHostEntry> GetHostEntryAsync (IPAddress address)
+ {
+ return Task<IPHostEntry>.Factory.FromAsync (BeginGetHostEntry, EndGetHostEntry, address, null);
+ }
+
+ public static Task<IPHostEntry> GetHostEntryAsync (string hostNameOrAddress)
+ {
+ return Task<IPHostEntry>.Factory.FromAsync (BeginGetHostEntry, EndGetHostEntry, hostNameOrAddress, null);
+ }
+#endif
}
}
projects / mono.git / blobdiff