AddressFamily Enum
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Specifies the addressing scheme that an instance of the Socket class can use.
public enum class AddressFamily
public enum AddressFamily
type AddressFamily =
Public Enum AddressFamily
- Inheritance
Fields
AppleTalk | 16 | AppleTalk address. |
Atm | 22 | Native ATM services address. |
Banyan | 21 | Banyan address. |
Ccitt | 10 | Addresses for CCITT protocols, such as X.25. |
Chaos | 5 | Address for MIT CHAOS protocols. |
Cluster | 24 | Address for Microsoft cluster products. |
ControllerAreaNetwork | 65537 | Controller Area Network address. |
DataKit | 9 | Address for Datakit protocols. |
DataLink | 13 | Direct data-link interface address. |
DecNet | 12 | DECnet address. |
Ecma | 8 | European Computer Manufacturers Association (ECMA) address. |
FireFox | 19 | FireFox address. |
HyperChannel | 15 | NSC Hyperchannel address. |
Ieee12844 | 25 | IEEE 1284.4 workgroup address. |
ImpLink | 3 | ARPANET IMP address. |
InterNetwork | 2 | Address for IP version 4. |
InterNetworkV6 | 23 | Address for IP version 6. |
Ipx | 6 | IPX or SPX address. |
Irda | 26 | IrDA address. |
Iso | 7 | Address for ISO protocols. |
Lat | 14 | LAT address. |
Max | 29 | MAX address. |
NetBios | 17 | NetBios address. |
NetworkDesigners | 28 | Address for Network Designers OSI gateway-enabled protocols. |
NS | 6 | Address for Xerox NS protocols. |
Osi | 7 | Address for OSI protocols. |
Packet | 65536 | Low-level Packet address. |
Pup | 4 | Address for PUP protocols. |
Sna | 11 | IBM SNA address. |
Unix | 1 | Unix local to host address. |
Unknown | -1 | Unknown address family. |
Unspecified | 0 | Unspecified address family. |
VoiceView | 18 | VoiceView address. |
Examples
The following example creates a Socket using the InterNetwork AddressFamily.
#using <System.dll>
using namespace System;
using namespace System::Text;
using namespace System::IO;
using namespace System::Net;
using namespace System::Net::Sockets;
String^ DoSocketGet( String^ server )
{
//Set up variables and String to write to the server.
Encoding^ ASCII = Encoding::ASCII;
String^ Get = "GET / HTTP/1.1\r\nHost: ";
Get->Concat( server, "\r\nConnection: Close\r\n\r\n" );
array<Byte>^ByteGet = ASCII->GetBytes( Get );
array<Byte>^RecvBytes = gcnew array<Byte>(256);
String^ strRetPage = nullptr;
// IPAddress and IPEndPoint represent the endpoint that will
// receive the request.
// Get first IPAddress in list return by DNS.
try
{
// Define those variables to be evaluated in the next for loop and
// then used to connect to the server. These variables are defined
// outside the for loop to make them accessible there after.
Socket^ s = nullptr;
IPEndPoint^ hostEndPoint;
IPAddress^ hostAddress = nullptr;
int conPort = 80;
// Get DNS host information.
IPHostEntry^ hostInfo = Dns::Resolve( server );
// Get the DNS IP addresses associated with the host.
array<IPAddress^>^IPaddresses = hostInfo->AddressList;
// Evaluate the socket and receiving host IPAddress and IPEndPoint.
for ( int index = 0; index < IPaddresses->Length; index++ )
{
hostAddress = IPaddresses[ index ];
hostEndPoint = gcnew IPEndPoint( hostAddress,conPort );
// Creates the Socket to send data over a TCP connection.
s = gcnew Socket( AddressFamily::InterNetwork,SocketType::Stream,ProtocolType::Tcp );
// Connect to the host using its IPEndPoint.
s->Connect( hostEndPoint );
if ( !s->Connected )
{
// Connection failed, try next IPaddress.
strRetPage = "Unable to connect to host";
s = nullptr;
continue;
}
// Sent the GET request to the host.
s->Send( ByteGet, ByteGet->Length, SocketFlags::None );
}
// Receive the host home page content and loop until all the data is received.
Int32 bytes = s->Receive( RecvBytes, RecvBytes->Length, SocketFlags::None );
strRetPage = "Default HTML page on ";
strRetPage->Concat( server, ":\r\n", ASCII->GetString( RecvBytes, 0, bytes ) );
while ( bytes > 0 )
{
bytes = s->Receive( RecvBytes, RecvBytes->Length, SocketFlags::None );
strRetPage->Concat( ASCII->GetString( RecvBytes, 0, bytes ) );
}
}
catch ( SocketException^ e )
{
Console::WriteLine( "SocketException caught!!!" );
Console::Write( "Source : " );
Console::WriteLine( e->Source );
Console::Write( "Message : " );
Console::WriteLine( e->Message );
}
catch ( ArgumentNullException^ e )
{
Console::WriteLine( "ArgumentNULLException caught!!!" );
Console::Write( "Source : " );
Console::WriteLine( e->Source );
Console::Write( "Message : " );
Console::WriteLine( e->Message );
}
catch ( NullReferenceException^ e )
{
Console::WriteLine( "NULLReferenceException caught!!!" );
Console::Write( "Source : " );
Console::WriteLine( e->Source );
Console::Write( "Message : " );
Console::WriteLine( e->Message );
}
catch ( Exception^ e )
{
Console::WriteLine( "Exception caught!!!" );
Console::Write( "Source : " );
Console::WriteLine( e->Source );
Console::Write( "Message : " );
Console::WriteLine( e->Message );
}
return strRetPage;
}
int main()
{
Console::WriteLine( DoSocketGet( "localhost" ) );
}
using System;
using System.Text;
using System.IO;
using System.Net;
using System.Net.Sockets;
public class Sample
{
public static string DoSocketGet(string server)
{
//Set up variables and String to write to the server.
Encoding ASCII = Encoding.ASCII;
string Get = "GET / HTTP/1.1\r\nHost: " + server +
"\r\nConnection: Close\r\n\r\n";
Byte[] ByteGet = ASCII.GetBytes(Get);
Byte[] RecvBytes = new Byte[256];
String strRetPage = null;
// IPAddress and IPEndPoint represent the endpoint that will
// receive the request.
// Get first IPAddress in list return by DNS.
try
{
// Define those variables to be evaluated in the next for loop and
// then used to connect to the server. These variables are defined
// outside the for loop to make them accessible there after.
Socket s = null;
IPEndPoint hostEndPoint;
IPAddress hostAddress = null;
int conPort = 80;
// Get DNS host information.
IPHostEntry hostInfo = Dns.GetHostEntry(server);
// Get the DNS IP addresses associated with the host.
IPAddress[] IPaddresses = hostInfo.AddressList;
// Evaluate the socket and receiving host IPAddress and IPEndPoint.
for (int index=0; index<IPaddresses.Length; index++)
{
hostAddress = IPaddresses[index];
hostEndPoint = new IPEndPoint(hostAddress, conPort);
// Creates the Socket to send data over a TCP connection.
s = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp );
// Connect to the host using its IPEndPoint.
s.Connect(hostEndPoint);
if (!s.Connected)
{
// Connection failed, try next IPaddress.
strRetPage = "Unable to connect to host";
s = null;
continue;
}
// Sent the GET request to the host.
s.Send(ByteGet, ByteGet.Length, 0);
} // End of the for loop.
// Receive the host home page content and loop until all the data is received.
Int32 bytes = s.Receive(RecvBytes, RecvBytes.Length, 0);
strRetPage = "Default HTML page on " + server + ":\r\n";
strRetPage = strRetPage + ASCII.GetString(RecvBytes, 0, bytes);
while (bytes > 0)
{
bytes = s.Receive(RecvBytes, RecvBytes.Length, 0);
strRetPage = strRetPage + ASCII.GetString(RecvBytes, 0, bytes);
}
} // End of the try block.
catch(SocketException e)
{
Console.WriteLine("SocketException caught!!!");
Console.WriteLine("Source : " + e.Source);
Console.WriteLine("Message : " + e.Message);
}
catch(ArgumentNullException e)
{
Console.WriteLine("ArgumentNullException caught!!!");
Console.WriteLine("Source : " + e.Source);
Console.WriteLine("Message : " + e.Message);
}
catch(NullReferenceException e)
{
Console.WriteLine("NullReferenceException caught!!!");
Console.WriteLine("Source : " + e.Source);
Console.WriteLine("Message : " + e.Message);
}
catch(Exception e)
{
Console.WriteLine("Exception caught!!!");
Console.WriteLine("Source : " + e.Source);
Console.WriteLine("Message : " + e.Message);
}
return strRetPage;
}
public static void Main()
{
Console.WriteLine(DoSocketGet("localhost"));
}
}
Imports System.Text
Imports System.IO
Imports System.Net
Imports System.Net.Sockets
_
Public Class Sample
Public Shared Function DoSocketGet(server As String) As String
'Set up variables and String to write to the server.
Dim ASCII As Encoding = Encoding.ASCII
Dim [Get] As String = "GET / HTTP/1.1" + ControlChars.Lf + ControlChars.NewLine + "Host: " + server + ControlChars.Lf + ControlChars.NewLine + "Connection: Close" + ControlChars.Lf + ControlChars.NewLine + ControlChars.Lf + ControlChars.NewLine
Dim ByteGet As [Byte]() = ASCII.GetBytes([Get])
Dim RecvBytes(256) As [Byte]
Dim strRetPage As [String] = Nothing
' IPAddress and IPEndPoint represent the endpoint that will
' receive the request.
' Get first IPAddress in list return by DNS.
Try
' Define those variables to be evaluated in the next for loop and
' then used to connect to the server. These variables are defined
' outside the for loop to make them accessible there after.
Dim s As Socket = Nothing
Dim hostEndPoint As IPEndPoint
Dim hostAddress As IPAddress = Nothing
Dim conPort As Integer = 80
' Get DNS host information.
Dim hostInfo As IPHostEntry = Dns.Resolve(server)
' Get the DNS IP addresses associated with the host.
Dim IPaddresses As IPAddress() = hostInfo.AddressList
' Evaluate the socket and receiving host IPAddress and IPEndPoint.
Dim index As Integer = 0
For index = 0 To IPaddresses.Length - 1
hostAddress = IPaddresses(index)
hostEndPoint = New IPEndPoint(hostAddress, conPort)
' Creates the Socket to send data over a TCP connection.
s = New Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp)
' Connect to the host using its IPEndPoint.
s.Connect(hostEndPoint)
If Not s.Connected Then
' Connection failed, try next IPaddress.
strRetPage = "Unable to connect to host"
s = Nothing
GoTo ContinueFor1
End If
' Sent the GET request to the host.
s.Send(ByteGet, ByteGet.Length, 0)
ContinueFor1:
Next index ' End of the for loop.
' Receive the host home page content and loop until all the data is received.
'Dim bytes As Int32 = s.Receive(RecvBytes, RecvBytes.Length, 0)
Dim bytes As Int32 = s.Receive(RecvBytes, RecvBytes.Length, 0)
strRetPage = "Default HTML page on " + server + ":\r\n"
strRetPage = "Default HTML page on " + server + ":" + ControlChars.Lf + ControlChars.NewLine
Dim i As Integer
While bytes > 0
bytes = s.Receive(RecvBytes, RecvBytes.Length, 0)
strRetPage = strRetPage + ASCII.GetString(RecvBytes, 0, bytes)
End While
' End of the try block.
Catch e As SocketException
Console.WriteLine("SocketException caught!!!")
Console.WriteLine(("Source : " + e.Source))
Console.WriteLine(("Message : " + e.Message))
Catch e As ArgumentNullException
Console.WriteLine("ArgumentNullException caught!!!")
Console.WriteLine(("Source : " + e.Source))
Console.WriteLine(("Message : " + e.Message))
Catch e As NullReferenceException
Console.WriteLine("NullReferenceException caught!!!")
Console.WriteLine(("Source : " + e.Source))
Console.WriteLine(("Message : " + e.Message))
Catch e As Exception
Console.WriteLine("Exception caught!!!")
Console.WriteLine(("Source : " + e.Source))
Console.WriteLine(("Message : " + e.Message))
End Try
Return strRetPage
End Function 'DoSocketGet
Public Shared Sub Main()
Console.WriteLine(DoSocketGet("localhost"))
End Sub
End Class
Remarks
An AddressFamily member specifies the addressing scheme that a Socket will use to resolve an address. For example, InterNetwork indicates that an IP version 4 address is expected when a Socket connects to an endpoint.