Export (0) Print
Expand All

ProtocolType Enumeration

Specifies the protocols that the Socket class supports.

Namespace:  System.Net.Sockets
Assembly:  System (in System.dll)

public enum ProtocolType

Member nameDescription
Supported by the .NET Compact FrameworkIPInternet Protocol.
IPv6HopByHopOptionsIPv6 Hop by Hop Options header.
Supported by the .NET Compact FrameworkIcmpInternet Control Message Protocol.
Supported by the .NET Compact FrameworkIgmpInternet Group Management Protocol.
Supported by the .NET Compact FrameworkGgpGateway To Gateway Protocol.
IPv4Internet Protocol version 4.
Supported by the .NET Compact FrameworkTcpTransmission Control Protocol.
Supported by the .NET Compact FrameworkPupPARC Universal Packet Protocol.
Supported by the .NET Compact FrameworkUdpUser Datagram Protocol.
Supported by the .NET Compact FrameworkIdpInternet Datagram Protocol.
Supported by the .NET Compact FrameworkIPv6Internet Protocol version 6 (IPv6).
IPv6RoutingHeaderIPv6 Routing header.
IPv6FragmentHeaderIPv6 Fragment header.
IPSecEncapsulatingSecurityPayloadIPv6 Encapsulating Security Payload header.
IPSecAuthenticationHeaderIPv6 Authentication header. For details, see RFC 2292 section 2.2.1, available at http://www.ietf.org.
IcmpV6Internet Control Message Protocol for IPv6.
IPv6NoNextHeaderIPv6 No next header.
IPv6DestinationOptionsIPv6 Destination Options header.
Supported by the .NET Compact FrameworkNDNet Disk Protocol (unofficial).
Supported by the .NET Compact FrameworkRawRaw IP packet protocol.
Supported by the .NET Compact FrameworkUnspecifiedUnspecified protocol.
Supported by the .NET Compact FrameworkIpxInternet Packet Exchange Protocol.
Supported by the .NET Compact FrameworkSpxSequenced Packet Exchange protocol.
Supported by the .NET Compact FrameworkSpxIISequenced Packet Exchange version 2 protocol.
Supported by the .NET Compact FrameworkUnknownUnknown protocol.

The Socket class uses the ProtocolType enumeration to inform the Windows Sockets API of the requested protocol. Low-level driver software for the requested protocol must be present on the computer for the Socket to be created successfully.

The following example demonstrates how to use ProtocolType to instantiate a Socket.

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"));
   }
 }
#using <mscorlib.dll>
#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");
   Byte ByteGet[] = ASCII->GetBytes(Get);
   Byte RecvBytes[] = new Byte[256];
   String *strRetPage = 0;

   // 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 = 0;
      IPEndPoint *hostEndPoint;
      IPAddress *hostAddress = 0;
      int conPort = 80;

      // Get DNS host information.
      IPHostEntry *hostInfo = Dns::Resolve(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 = 0;
            continue;
         }

         // Sent the GET request to the host.
         s->Send(ByteGet, ByteGet->Length, SocketFlags::None);


      } // 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, 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));
      }


   } // End of the try block.

   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"));
}

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

Community Additions

ADD
Show:
© 2014 Microsoft