using System;
using System.Collections;
using System.Net.Sockets;
using System.Runtime.CompilerServices;
using System.Runtime.Remoting.Messaging;
namespace System.Net
{
/// Provides simple domain name resolution functionality.
// Token: 0x02000212 RID: 530
public static class Dns
{
// Token: 0x06001209 RID: 4617 RVA: 0x00035F54 File Offset: 0x00034154
static Dns()
{
global::System.Net.Sockets.Socket.CheckProtocolSupport();
}
/// Begins an asynchronous request for information about the specified DNS host name.
/// An instance that references the asynchronous request.
/// The DNS name of the host.
/// An delegate that references the method to invoke when the operation is complete.
/// A user-defined object that contains information about the operation. This object is passed to the delegate when the operation is complete.
///
/// is null.
/// An error was encountered executing the DNS query.
///
///
///
///
///
///
// Token: 0x0600120A RID: 4618 RVA: 0x00035F5C File Offset: 0x0003415C
[Obsolete("Use BeginGetHostEntry instead")]
public static IAsyncResult BeginGetHostByName(string hostName, AsyncCallback requestCallback, object stateObject)
{
if (hostName == null)
{
throw new ArgumentNullException("hostName");
}
Dns.GetHostByNameCallback getHostByNameCallback = new Dns.GetHostByNameCallback(Dns.GetHostByName);
return getHostByNameCallback.BeginInvoke(hostName, requestCallback, stateObject);
}
/// Begins an asynchronous request to resolve a DNS host name or IP address to an instance.
/// An instance that references the asynchronous request.
/// The DNS name of the host.
/// An delegate that references the method to invoke when the operation is complete.
/// A user-defined object that contains information about the operation. This object is passed to the delegate when the operation is complete.
///
/// is null.
/// The caller does not have permission to access DNS information.
///
///
///
///
///
///
// Token: 0x0600120B RID: 4619 RVA: 0x00035F90 File Offset: 0x00034190
[Obsolete("Use BeginGetHostEntry instead")]
public static IAsyncResult BeginResolve(string hostName, AsyncCallback requestCallback, object stateObject)
{
if (hostName == null)
{
throw new ArgumentNullException("hostName");
}
Dns.ResolveCallback resolveCallback = new Dns.ResolveCallback(Dns.Resolve);
return resolveCallback.BeginInvoke(hostName, requestCallback, stateObject);
}
/// Asynchronously returns the Internet Protocol (IP) addresses for the specified host.
/// An instance that references the asynchronous request.
/// The host name or IP address to resolve.
/// An delegate that references the method to invoke when the operation is complete.
/// A user-defined object that contains information about the operation. This object is passed to the delegate when the operation is complete.
///
/// is null.
/// The length of is greater than 126 characters.
/// An error is encountered when resolving .
///
/// is an invalid IP address.
// Token: 0x0600120C RID: 4620 RVA: 0x00035FC4 File Offset: 0x000341C4
public static IAsyncResult BeginGetHostAddresses(string hostNameOrAddress, AsyncCallback requestCallback, object stateObject)
{
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");
}
Dns.GetHostAddressesCallback getHostAddressesCallback = new Dns.GetHostAddressesCallback(Dns.GetHostAddresses);
return getHostAddressesCallback.BeginInvoke(hostNameOrAddress, requestCallback, stateObject);
}
/// Asynchronously resolves a host name or IP address to an instance.
/// An instance that references the asynchronous request.
/// The host name or IP address to resolve.
/// An delegate that references the method to invoke when the operation is complete.
/// A user-defined object that contains information about the operation. This object is passed to the delegate when the operation is complete.
///
/// is null.
/// The length of is greater than 126 characters.
/// An error is encountered when resolving .
///
/// is an invalid IP address.
// Token: 0x0600120D RID: 4621 RVA: 0x00036028 File Offset: 0x00034228
public static IAsyncResult BeginGetHostEntry(string hostNameOrAddress, AsyncCallback requestCallback, object stateObject)
{
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");
}
Dns.GetHostEntryNameCallback getHostEntryNameCallback = new Dns.GetHostEntryNameCallback(Dns.GetHostEntry);
return getHostEntryNameCallback.BeginInvoke(hostNameOrAddress, requestCallback, stateObject);
}
/// Asynchronously resolves an IP address to an instance.
/// An instance that references the asynchronous request.
/// The IP address to resolve.
/// An delegate that references the method to invoke when the operation is complete.
/// A user-defined object that contains information about the operation. This object is passed to the delegate when the operation is complete.
///
/// is null.
/// An error is encountered when resolving .
///
/// is an invalid IP address.
// Token: 0x0600120E RID: 4622 RVA: 0x0003608C File Offset: 0x0003428C
public static IAsyncResult BeginGetHostEntry(IPAddress address, AsyncCallback requestCallback, object stateObject)
{
if (address == null)
{
throw new ArgumentNullException("address");
}
Dns.GetHostEntryIPCallback getHostEntryIPCallback = new Dns.GetHostEntryIPCallback(Dns.GetHostEntry);
return getHostEntryIPCallback.BeginInvoke(address, requestCallback, stateObject);
}
/// Ends an asynchronous request for DNS information.
/// An object that contains DNS information about a host.
/// An instance that is returned by a call to the method.
///
/// is null.
///
///
///
///
///
// Token: 0x0600120F RID: 4623 RVA: 0x000360C0 File Offset: 0x000342C0
[Obsolete("Use EndGetHostEntry instead")]
public static IPHostEntry EndGetHostByName(IAsyncResult asyncResult)
{
if (asyncResult == null)
{
throw new ArgumentNullException("asyncResult");
}
AsyncResult asyncResult2 = (AsyncResult)asyncResult;
Dns.GetHostByNameCallback getHostByNameCallback = (Dns.GetHostByNameCallback)asyncResult2.AsyncDelegate;
return getHostByNameCallback.EndInvoke(asyncResult);
}
/// Ends an asynchronous request for DNS information.
/// An object that contains DNS information about a host.
/// An instance that is returned by a call to the method.
///
/// is null.
///
///
///
///
///
// Token: 0x06001210 RID: 4624 RVA: 0x000360F8 File Offset: 0x000342F8
[Obsolete("Use EndGetHostEntry instead")]
public static IPHostEntry EndResolve(IAsyncResult asyncResult)
{
if (asyncResult == null)
{
throw new ArgumentNullException("asyncResult");
}
AsyncResult asyncResult2 = (AsyncResult)asyncResult;
Dns.ResolveCallback resolveCallback = (Dns.ResolveCallback)asyncResult2.AsyncDelegate;
return resolveCallback.EndInvoke(asyncResult);
}
/// Ends an asynchronous request for DNS information.
/// An array of type that holds the IP addresses for the host specified by the parameter of .
/// An instance returned by a call to the method.
// Token: 0x06001211 RID: 4625 RVA: 0x00036130 File Offset: 0x00034330
public static IPAddress[] EndGetHostAddresses(IAsyncResult asyncResult)
{
if (asyncResult == null)
{
throw new ArgumentNullException("asyncResult");
}
AsyncResult asyncResult2 = (AsyncResult)asyncResult;
Dns.GetHostAddressesCallback getHostAddressesCallback = (Dns.GetHostAddressesCallback)asyncResult2.AsyncDelegate;
return getHostAddressesCallback.EndInvoke(asyncResult);
}
/// Ends an asynchronous request for DNS information.
/// An instance that contains address information about the host.
/// An instance returned by a call to an method.
///
/// is null.
// Token: 0x06001212 RID: 4626 RVA: 0x00036168 File Offset: 0x00034368
public static IPHostEntry EndGetHostEntry(IAsyncResult asyncResult)
{
if (asyncResult == null)
{
throw new ArgumentNullException("asyncResult");
}
AsyncResult asyncResult2 = (AsyncResult)asyncResult;
if (asyncResult2.AsyncDelegate is Dns.GetHostEntryIPCallback)
{
return ((Dns.GetHostEntryIPCallback)asyncResult2.AsyncDelegate).EndInvoke(asyncResult);
}
Dns.GetHostEntryNameCallback getHostEntryNameCallback = (Dns.GetHostEntryNameCallback)asyncResult2.AsyncDelegate;
return getHostEntryNameCallback.EndInvoke(asyncResult);
}
// Token: 0x06001213 RID: 4627
[MethodImpl(MethodImplOptions.InternalCall)]
private static extern bool GetHostByName_internal(string host, out string h_name, out string[] h_aliases, out string[] h_addr_list);
// Token: 0x06001214 RID: 4628
[MethodImpl(MethodImplOptions.InternalCall)]
private static extern bool GetHostByAddr_internal(string addr, out string h_name, out string[] h_aliases, out string[] h_addr_list);
// Token: 0x06001215 RID: 4629
[MethodImpl(MethodImplOptions.InternalCall)]
private static extern bool GetHostName_internal(out string h_name);
// Token: 0x06001216 RID: 4630 RVA: 0x000361C4 File Offset: 0x000343C4
private static IPHostEntry hostent_to_IPHostEntry(string h_name, string[] h_aliases, string[] h_addrlist)
{
IPHostEntry iphostEntry = new IPHostEntry();
ArrayList arrayList = new ArrayList();
iphostEntry.HostName = h_name;
iphostEntry.Aliases = h_aliases;
for (int i = 0; i < h_addrlist.Length; i++)
{
try
{
IPAddress ipaddress = IPAddress.Parse(h_addrlist[i]);
if ((global::System.Net.Sockets.Socket.SupportsIPv6 && ipaddress.AddressFamily == global::System.Net.Sockets.AddressFamily.InterNetworkV6) || (global::System.Net.Sockets.Socket.SupportsIPv4 && ipaddress.AddressFamily == global::System.Net.Sockets.AddressFamily.InterNetwork))
{
arrayList.Add(ipaddress);
}
}
catch (ArgumentNullException)
{
}
}
if (arrayList.Count == 0)
{
throw new global::System.Net.Sockets.SocketException(11001);
}
iphostEntry.AddressList = arrayList.ToArray(typeof(IPAddress)) as IPAddress[];
return iphostEntry;
}
/// Creates an instance from the specified .
/// An .
/// An .
///
/// is null.
/// An error is encountered when resolving .
///
///
///
///
///
///
// Token: 0x06001217 RID: 4631 RVA: 0x00036298 File Offset: 0x00034498
[Obsolete("Use GetHostEntry instead")]
public static IPHostEntry GetHostByAddress(IPAddress address)
{
if (address == null)
{
throw new ArgumentNullException("address");
}
return Dns.GetHostByAddressFromString(address.ToString(), false);
}
/// Creates an instance from an IP address.
/// An instance.
/// An IP address.
///
/// is null.
/// An error is encountered when resolving .
///
/// is not a valid IP address.
///
///
///
///
///
///
// Token: 0x06001218 RID: 4632 RVA: 0x000362B8 File Offset: 0x000344B8
[Obsolete("Use GetHostEntry instead")]
public static IPHostEntry GetHostByAddress(string address)
{
if (address == null)
{
throw new ArgumentNullException("address");
}
return Dns.GetHostByAddressFromString(address, true);
}
// Token: 0x06001219 RID: 4633 RVA: 0x000362D4 File Offset: 0x000344D4
private static IPHostEntry GetHostByAddressFromString(string address, bool parse)
{
if (address.Equals("0.0.0.0"))
{
address = "127.0.0.1";
parse = false;
}
if (parse)
{
IPAddress.Parse(address);
}
string text;
string[] array;
string[] array2;
if (!Dns.GetHostByAddr_internal(address, out text, out array, out array2))
{
throw new global::System.Net.Sockets.SocketException(11001);
}
return Dns.hostent_to_IPHostEntry(text, array, array2);
}
/// Resolves a host name or IP address to an instance.
/// An instance that contains address information about the host specified in .
/// The host name or IP address to resolve.
/// The parameter is null.
/// The length of parameter is greater than 126 characters.
/// An error was encountered when resolving the parameter.
/// The parameter is an invalid IP address.
// Token: 0x0600121A RID: 4634 RVA: 0x00036330 File Offset: 0x00034530
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");
}
IPAddress ipaddress;
if (hostNameOrAddress.Length > 0 && IPAddress.TryParse(hostNameOrAddress, out ipaddress))
{
return Dns.GetHostEntry(ipaddress);
}
return Dns.GetHostByName(hostNameOrAddress);
}
/// Resolves an IP address to an instance.
/// An instance that contains address information about the host specified in .
/// An IP address.
///
/// is null.
/// An error is encountered when resolving .
///
/// is an invalid IP address.
// Token: 0x0600121B RID: 4635 RVA: 0x000363A4 File Offset: 0x000345A4
public static IPHostEntry GetHostEntry(IPAddress address)
{
if (address == null)
{
throw new ArgumentNullException("address");
}
return Dns.GetHostByAddressFromString(address.ToString(), false);
}
/// Returns the Internet Protocol (IP) addresses for the specified host.
/// An array of type that holds the IP addresses for the host that is specified by the parameter.
/// The host name or IP address to resolve.
///
/// is null.
/// The length of is greater than 126 characters.
/// An error is encountered when resolving .
///
/// is an invalid IP address.
// Token: 0x0600121C RID: 4636 RVA: 0x000363C4 File Offset: 0x000345C4
public static IPAddress[] GetHostAddresses(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");
}
IPAddress ipaddress;
if (hostNameOrAddress.Length > 0 && IPAddress.TryParse(hostNameOrAddress, out ipaddress))
{
return new IPAddress[] { ipaddress };
}
return Dns.GetHostEntry(hostNameOrAddress).AddressList;
}
/// Gets the DNS information for the specified DNS host name.
/// An object that contains host information for the address specified in .
/// The DNS name of the host.
///
/// is null.
/// The length of is greater than 126 characters.
/// An error is encountered when resolving .
///
///
///
///
///
///
// Token: 0x0600121D RID: 4637 RVA: 0x00036444 File Offset: 0x00034644
[Obsolete("Use GetHostEntry instead")]
public static IPHostEntry GetHostByName(string hostName)
{
if (hostName == null)
{
throw new ArgumentNullException("hostName");
}
string text;
string[] array;
string[] array2;
if (!Dns.GetHostByName_internal(hostName, out text, out array, out array2))
{
throw new global::System.Net.Sockets.SocketException(11001);
}
return Dns.hostent_to_IPHostEntry(text, array, array2);
}
/// Gets the host name of the local computer.
/// A string that contains the DNS host name of the local computer.
/// An error is encountered when resolving the local host name.
///
///
///
// Token: 0x0600121E RID: 4638 RVA: 0x00036488 File Offset: 0x00034688
public static string GetHostName()
{
string text;
if (!Dns.GetHostName_internal(out text))
{
throw new global::System.Net.Sockets.SocketException(11001);
}
return text;
}
/// Resolves a DNS host name or IP address to an instance.
/// An instance that contains address information about the host specified in .
/// A DNS-style host name or IP address.
///
/// is null.
/// The length of is greater than 126 characters.
/// An error is encountered when resolving .
///
///
///
///
///
///
// Token: 0x0600121F RID: 4639 RVA: 0x000364B0 File Offset: 0x000346B0
[Obsolete("Use GetHostEntry instead")]
public static IPHostEntry Resolve(string hostName)
{
if (hostName == null)
{
throw new ArgumentNullException("hostName");
}
IPHostEntry iphostEntry = null;
try
{
iphostEntry = Dns.GetHostByAddress(hostName);
}
catch
{
}
if (iphostEntry == null)
{
iphostEntry = Dns.GetHostByName(hostName);
}
return iphostEntry;
}
// Token: 0x02000310 RID: 784
// (Invoke) Token: 0x06001C19 RID: 7193
private delegate IPHostEntry GetHostByNameCallback(string hostName);
// Token: 0x02000311 RID: 785
// (Invoke) Token: 0x06001C1D RID: 7197
private delegate IPHostEntry ResolveCallback(string hostName);
// Token: 0x02000312 RID: 786
// (Invoke) Token: 0x06001C21 RID: 7201
private delegate IPHostEntry GetHostEntryNameCallback(string hostName);
// Token: 0x02000313 RID: 787
// (Invoke) Token: 0x06001C25 RID: 7205
private delegate IPHostEntry GetHostEntryIPCallback(IPAddress hostAddress);
// Token: 0x02000314 RID: 788
// (Invoke) Token: 0x06001C29 RID: 7209
private delegate IPAddress[] GetHostAddressesCallback(string hostName);
}
}