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ProtocolType Enumeration
Visual Studio 2008
Specifies the protocols that the Socket class supports.
Assembly: System (in System.dll)
| Member name | Description | |
|---|---|---|
![]() | IP | Internet Protocol. |
| IPv6HopByHopOptions | IPv6 Hop by Hop Options header. | |
![]() | Icmp | Internet Control Message Protocol. |
![]() | Igmp | Internet Group Management Protocol. |
![]() | Ggp | Gateway To Gateway Protocol. |
| IPv4 | Internet Protocol version 4. | |
![]() | Tcp | Transmission Control Protocol. |
![]() | Pup | PARC Universal Packet Protocol. |
![]() | Udp | User Datagram Protocol. |
![]() | Idp | Internet Datagram Protocol. |
![]() | IPv6 | Internet Protocol version 6 (IPv6). |
| IPv6RoutingHeader | IPv6 Routing header. | |
| IPv6FragmentHeader | IPv6 Fragment header. | |
| IPSecEncapsulatingSecurityPayload | IPv6 Encapsulating Security Payload header. | |
| IPSecAuthenticationHeader | IPv6 Authentication header. For details, see RFC 2292 section 2.2.1, available at http://www.ietf.org. | |
| IcmpV6 | Internet Control Message Protocol for IPv6. | |
| IPv6NoNextHeader | IPv6 No next header. | |
| IPv6DestinationOptions | IPv6 Destination Options header. | |
![]() | ND | Net Disk Protocol (unofficial). |
![]() | Raw | Raw IP packet protocol. |
![]() | Unspecified | Unspecified protocol. |
![]() | Ipx | Internet Packet Exchange Protocol. |
![]() | Spx | Sequenced Packet Exchange protocol. |
![]() | SpxII | Sequenced Packet Exchange version 2 protocol. |
![]() | Unknown | Unknown protocol. |
The following example demonstrates how to use ProtocolType to instantiate a Socket.
Imports System 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 'Main End Class 'Sample
#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.
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