IPEndPoint Класс
Определение
Важно!
Некоторые сведения относятся к предварительной версии продукта, в которую до выпуска могут быть внесены существенные изменения. Майкрософт не предоставляет никаких гарантий, явных или подразумеваемых, относительно приведенных здесь сведений.
Представляет сетевую конечную точку в виде IP-адреса и номер порта.
public ref class IPEndPoint : System::Net::EndPoint
public class IPEndPoint : System.Net.EndPoint
[System.Serializable]
public class IPEndPoint : System.Net.EndPoint
type IPEndPoint = class
inherit EndPoint
[<System.Serializable>]
type IPEndPoint = class
inherit EndPoint
Public Class IPEndPoint
Inherits EndPoint
- Наследование
- Атрибуты
Примеры
// This example uses the IPEndPoint class and its members to display the home page
// of the server selected by the user.
#using <System.dll>
using namespace System;
using namespace System::Text;
using namespace System::IO;
using namespace System::Net;
using namespace System::Net::Sockets;
using namespace System::Text::RegularExpressions;
// The getPage function gets the server's home page content by
// recreating the server's endpoint from the original serialized endpoint.
// Then it creates a new socket and connects it to the endpoint.
String^ getPage( String^ server, SocketAddress^ socketAddress )
{
//Set up variables and string to write to the server.
Encoding^ ASCII = Encoding::ASCII;
String^ Get = String::Format( "GET / HTTP/1.1\r\nHost: {0}\r\nConnection: Close\r\n\r\n", server );
array<Byte>^ByteGet = ASCII->GetBytes( Get );
array<Byte>^RecvBytes = gcnew array<Byte>(256);
String^ strRetPage = nullptr;
Socket^ socket = nullptr;
// Recreate the connection endpoint from the serialized information.
IPEndPoint^ endpoint = gcnew IPEndPoint( (__int64)0,0 );
IPEndPoint^ clonedIPEndPoint = dynamic_cast<IPEndPoint^>(endpoint->Create( socketAddress ));
Console::WriteLine( "clonedIPEndPoint: {0}", clonedIPEndPoint );
Console::WriteLine( "Press any key to continue." );
Console::ReadLine();
try
{
// Create a socket object to establish a connection with the server.
socket = gcnew Socket( endpoint->AddressFamily,SocketType::Stream,ProtocolType::Tcp );
// Connect to the cloned end point.
socket->Connect( clonedIPEndPoint );
}
catch ( SocketException^ e )
{
Console::WriteLine( "Source : {0}", e->Source );
Console::WriteLine( "Message : {0}", e->Message );
}
catch ( Exception^ e )
{
Console::WriteLine( "Source : {0}", e->Source );
Console::WriteLine( "Message : {0}", e->Message );
}
if ( socket == nullptr )
return ("Connection to cloned endpoint failed");
// Send request to the server.
socket->Send( ByteGet, ByteGet->Length, static_cast<SocketFlags>(0) );
// Receive the server home page content.
Int32 bytes = socket->Receive( RecvBytes, RecvBytes->Length, static_cast<SocketFlags>(0) );
// Read the first 256 bytes.
strRetPage = String::Format( "Default HTML page on {0}:\r\n", server );
strRetPage = String::Concat( strRetPage, ASCII->GetString( RecvBytes, 0, bytes ) );
while ( bytes > 0 )
{
bytes = socket->Receive( RecvBytes, RecvBytes->Length, static_cast<SocketFlags>(0) );
strRetPage = String::Concat( strRetPage, ASCII->GetString( RecvBytes, 0, bytes ) );
}
socket->Close();
return strRetPage;
}
// The serializeEndpoint function serializes the endpoint and returns the
// SocketAddress containing the serialized endpoint data.
SocketAddress^ serializeEndpoint( IPEndPoint^ endpoint )
{
// Serialize IPEndPoint details to a SocketAddress instance.
SocketAddress^ socketAddress = endpoint->Serialize();
// Display the serialized endpoint information.
Console::WriteLine( "Endpoint.Serialize() : {0}", socketAddress );
Console::WriteLine( "Socket->Family : {0}", socketAddress->Family );
Console::WriteLine( "Socket->Size : {0}", socketAddress->Size );
Console::WriteLine( "Press any key to continue." );
Console::ReadLine();
return socketAddress;
}
void displayEndpointInfo( IPEndPoint^ endpoint )
{
Console::WriteLine( "Endpoint->Address : {0}", endpoint->Address );
Console::WriteLine( "Endpoint->AddressFamily : {0}", endpoint->AddressFamily );
Console::WriteLine( "Endpoint->Port : {0}", endpoint->Port );
Console::WriteLine( "Endpoint.ToString() : {0}", endpoint );
Console::WriteLine( "Press any key to continue." );
Console::ReadLine();
}
// The serializeEndpoint function determines the server endpoint and then
// serializes it to obtain the related SocketAddress object.
// Note that in the for loop a temporary socket is created to ensure that
// the current IP address format matches the AddressFamily type.
// In fact, in the case of servers supporting both IPv4 and IPv6, an exception
// may arise if an IP address format does not match the address family type.
SocketAddress^ getSocketAddress( String^ server, int port )
{
Socket^ tempSocket = nullptr;
IPHostEntry^ host = nullptr;
SocketAddress^ serializedSocketAddress = nullptr;
try
{
// Get the object containing Internet host information.
host = Dns::Resolve( server );
// Obtain the IP address from the list of IP addresses associated with the server.
System::Collections::IEnumerator^ myEnum = host->AddressList->GetEnumerator();
while ( myEnum->MoveNext() )
{
IPAddress^ address = safe_cast<IPAddress^>(myEnum->Current);
IPEndPoint^ endpoint = gcnew IPEndPoint( address,port );
tempSocket = gcnew Socket( endpoint->AddressFamily,SocketType::Stream,ProtocolType::Tcp );
tempSocket->Connect( endpoint );
if ( tempSocket->Connected )
{
// Display the endpoint information.
displayEndpointInfo( endpoint );
// Serialize the endpoint to obtain a SocketAddress object.
serializedSocketAddress = serializeEndpoint( endpoint );
break;
}
else
continue;
}
// Close the temporary socket.
tempSocket->Close();
}
catch ( SocketException^ e )
{
Console::WriteLine( "Source : {0}", e->Source );
Console::WriteLine( "Message : {0}", e->Message );
}
catch ( Exception^ e )
{
Console::WriteLine( "Source : {0}", e->Source );
Console::WriteLine( "Message : {0}", e->Message );
}
return serializedSocketAddress;
}
// The requestServerHomePage function obtains the server's home page and returns
// its content.
String^ requestServerHomePage( String^ server, int port )
{
String^ strRetPage = nullptr;
// Get a socket address using the specified server and port.
SocketAddress^ socketAddress = getSocketAddress( server, port );
if ( socketAddress == nullptr )
strRetPage = "Connection failed"; // Obtain the server's home page content.
else
strRetPage = getPage( server, socketAddress );
return strRetPage;
}
// Show to the user how to use this program when wrong input parameters are entered.
void showUsage()
{
Console::WriteLine( "Enter the server name as follows:" );
Console::WriteLine( "\tcs_ipendpoint servername" );
}
// This is the program entry point. It allows the user to enter
// a server name that is used to locate its current homepage.
int main()
{
array<String^>^args = Environment::GetCommandLineArgs();
String^ host = nullptr;
int port = 80;
// Define a regular expression to parse user's input.
// This is a security check. It allows only
// alphanumeric input string between 2 to 40 character long.
Regex^ rex = gcnew Regex( "^[a-zA-Z]\\w{1,39}$" );
if ( args->Length < 2 )
showUsage();
else
{
String^ message = args[ 1 ];
if ( (rex->Match(message))->Success )
{
host = args[ 1 ];
// Get the specified server home_page and display its content.
String^ result = requestServerHomePage( host, port );
Console::WriteLine( result );
}
else
Console::WriteLine( "Input string format not allowed." );
}
}
// This example uses the IPEndPoint class and its members to display the home page
// of the server selected by the user.
using System;
using System.Text;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Text.RegularExpressions;
namespace Mssc.Services.ConnectionManagement
{
public class TestIPEndPoint
{
// The getPage method gets the server's home page content by
// recreating the server's endpoint from the original serialized endpoint.
// Then it creates a new socket and connects it to the endpoint.
private static string getPage(string server, SocketAddress socketAddress)
{
//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;
Socket socket = null;
// Recreate the connection endpoint from the serialized information.
IPEndPoint endpoint = new IPEndPoint(0,0);
IPEndPoint clonedIPEndPoint = (IPEndPoint) endpoint.Create(socketAddress);
Console.WriteLine("clonedIPEndPoint: " + clonedIPEndPoint.ToString());
Console.WriteLine("Press any key to continue.");
Console.ReadLine();
try
{
// Create a socket object to establish a connection with the server.
socket =
new Socket(endpoint.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
// Connect to the cloned end point.
socket.Connect(clonedIPEndPoint);
}
catch(SocketException e)
{
Console.WriteLine("Source : " + e.Source);
Console.WriteLine("Message : " + e.Message);
}
catch(Exception e)
{
Console.WriteLine("Source : " + e.Source);
Console.WriteLine("Message : " + e.Message);
}
if (socket == null)
return ("Connection to cloned endpoint failed");
// Send request to the server.
socket.Send(ByteGet, ByteGet.Length, 0);
// Receive the server home page content.
Int32 bytes = socket.Receive(RecvBytes, RecvBytes.Length, 0);
// Read the first 256 bytes.
strRetPage = "Default HTML page on " + server + ":\r\n";
strRetPage = strRetPage + ASCII.GetString(RecvBytes, 0, bytes);
while (bytes > 0)
{
bytes = socket.Receive(RecvBytes, RecvBytes.Length, 0);
strRetPage = strRetPage + ASCII.GetString(RecvBytes, 0, bytes);
}
socket.Close();
return strRetPage;
}
// The serializeEndpoint method serializes the endpoint and returns the
// SocketAddress containing the serialized endpoint data.
private static SocketAddress serializeEndpoint(IPEndPoint endpoint)
{
// Serialize IPEndPoint details to a SocketAddress instance.
SocketAddress socketAddress = endpoint.Serialize();
// Display the serialized endpoint information.
Console.WriteLine("Endpoint.Serialize() : " + socketAddress.ToString());
Console.WriteLine("Socket.Family : " + socketAddress.Family);
Console.WriteLine("Socket.Size : " + socketAddress.Size);
Console.WriteLine("Press any key to continue.");
Console.ReadLine();
return socketAddress;
}
private static void displayEndpointInfo(IPEndPoint endpoint)
{
Console.WriteLine("Endpoint.Address : " + endpoint.Address);
Console.WriteLine("Endpoint.AddressFamily : " + endpoint.AddressFamily);
Console.WriteLine("Endpoint.Port : " + endpoint.Port);
Console.WriteLine("Endpoint.ToString() : " + endpoint.ToString());
Console.WriteLine("Press any key to continue.");
Console.ReadLine();
}
// The serializeEndpoint method determines the server endpoint and then
// serializes it to obtain the related SocketAddress object.
// Note that in the for loop a temporary socket is created to ensure that
// the current IP address format matches the AddressFamily type.
// In fact, in the case of servers supporting both IPv4 and IPv6, an exception
// may arise if an IP address format does not match the address family type.
private static SocketAddress getSocketAddress(string server, int port)
{
Socket tempSocket = null;
IPHostEntry host = null;
SocketAddress serializedSocketAddress = null;
try
{
// Get the object containing Internet host information.
host = Dns.Resolve(server);
// Obtain the IP address from the list of IP addresses associated with the server.
foreach(IPAddress address in host.AddressList)
{
IPEndPoint endpoint = new IPEndPoint(address, port);
tempSocket =
new Socket(endpoint.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
tempSocket.Connect(endpoint);
if(tempSocket.Connected)
{
// Display the endpoint information.
displayEndpointInfo(endpoint);
// Serialize the endpoint to obtain a SocketAddress object.
serializedSocketAddress = serializeEndpoint(endpoint);
break;
}
else
{
continue;
}
}
// Close the temporary socket.
tempSocket.Close();
}
catch(SocketException e)
{
Console.WriteLine("Source : " + e.Source);
Console.WriteLine("Message : " + e.Message);
}
catch(Exception e)
{
Console.WriteLine("Source : " + e.Source);
Console.WriteLine("Message : " + e.Message);
}
return serializedSocketAddress;
}
// The requestServerHomePage method obtains the server's home page and returns
// its content.
private static string requestServerHomePage(string server, int port)
{
String strRetPage = null;
// Get a socket address using the specified server and port.
SocketAddress socketAddress = getSocketAddress(server, port);
if (socketAddress == null)
strRetPage = "Connection failed";
else
// Obtain the server's home page content.
strRetPage = getPage(server, socketAddress);
return strRetPage;
}
// Show to the user how to use this program when wrong input parameters are entered.
private static void showUsage()
{
Console.WriteLine("Enter the server name as follows:");
Console.WriteLine("\tcs_ipendpoint servername");
}
// This is the program entry point. It allows the user to enter
// a server name that is used to locate its current homepage.
public static void Main(string[] args)
{
string host= null;
int port = 80;
// Define a regular expression to parse user's input.
// This is a security check. It allows only
// alphanumeric input string between 2 to 40 character long.
Regex rex = new Regex(@"^[a-zA-Z]\w{1,39}$");
if (args.Length < 1)
{
showUsage();
}
else
{
string message = args[0];
if ((rex.Match(message)).Success)
{
host = args[0];
// Get the specified server home_page and display its content.
string result = requestServerHomePage(host, port);
Console.WriteLine(result);
}
else
{
Console.WriteLine("Input string format not allowed.");
}
}
}
}
}
' This example uses the IPEndPoint class and its members to display the home page
' of the server selected by the user.
Imports System.Text
Imports System.IO
Imports System.Net
Imports System.Net.Sockets
Imports System.Text.RegularExpressions
Namespace Mssc.Services.ConnectionManagement
Module M_TestIPEndPoint
Public Class TestIPEndPoint
'The getPage method gets the server's home page content by
'recreating the server's endpoint from the original serialized endpoint.
'Then it creates a new socket and connects it to the endpoint.
Private Shared Function getPage(ByVal server As String, ByVal socketAddress As SocketAddress) 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.Cr + ControlChars.Lf + "Host: " + server + ControlChars.Cr + ControlChars.Lf + "Connection: Close" + ControlChars.Cr + ControlChars.Lf + ControlChars.Cr + ControlChars.Lf
Dim ByteGet As [Byte]() = ASCII.GetBytes([Get])
Dim RecvBytes(255) As [Byte]
Dim strRetPage As [String] = Nothing
Dim socket As Socket = Nothing
' Recreate the connection endpoint from the serialized information.
Dim endpoint As New IPEndPoint(0, 0)
Dim clonedIPEndPoint As IPEndPoint = CType(endpoint.Create(socketAddress), IPEndPoint)
Console.WriteLine(("clonedIPEndPoint: " + clonedIPEndPoint.ToString()))
Console.WriteLine("Press any key to continue.")
Console.ReadLine()
Try
' Create a socket object to establish a connection with the server.
socket = New Socket(endpoint.AddressFamily, SocketType.Stream, ProtocolType.Tcp)
' Connect to the cloned end point.
socket.Connect(clonedIPEndPoint)
Catch e As SocketException
Console.WriteLine(("Source : " + e.Source))
Console.WriteLine(("Message : " + e.Message))
Catch e As Exception
Console.WriteLine(("Source : " + e.Source))
Console.WriteLine(("Message : " + e.Message))
End Try
If socket Is Nothing Then
Return "Connection to cloned endpoint failed"
End If
' Send request to the server.
socket.Send(ByteGet, ByteGet.Length, 0)
' Receive the server home page content.
Dim bytes As Int32 = socket.Receive(RecvBytes, RecvBytes.Length, 0)
' Read the first 256 bytes.
strRetPage = "Default HTML page on " + server + ":" + ControlChars.Cr + ControlChars.Lf
strRetPage = strRetPage + ASCII.GetString(RecvBytes, 0, bytes)
While bytes > 0
bytes = socket.Receive(RecvBytes, RecvBytes.Length, 0)
strRetPage = strRetPage + ASCII.GetString(RecvBytes, 0, bytes)
End While
socket.Close()
Return strRetPage
End Function 'getPage
' The serializeEndpoint method serializes the endpoint and returns the
' SocketAddress containing the serialized endpoint data.
Private Shared Function serializeEndpoint(ByVal endpoint As IPEndPoint) As SocketAddress
' Serialize IPEndPoint details to a SocketAddress instance.
Dim socketAddress As SocketAddress = endpoint.Serialize()
' Display the serialized endpoint information.
Console.WriteLine("Endpoint Serialize() : " + socketAddress.ToString())
Console.WriteLine("Socket Family : " + socketAddress.Family.ToString())
Console.WriteLine("Socket Size : " + socketAddress.ToString())
Console.WriteLine("Press any key to continue.")
Console.ReadLine()
Return socketAddress
End Function 'serializeEndpoint
Private Shared Sub displayEndpointInfo(ByVal endpoint As IPEndPoint)
Console.WriteLine("Endpoint Address : " + endpoint.Address.ToString())
Console.WriteLine("Endpoint AddressFamily : " + endpoint.AddressFamily.ToString())
Console.WriteLine("Endpoint Port : " + endpoint.Port.ToString())
Console.WriteLine("Endpoint ToString() : " + endpoint.ToString())
Console.WriteLine("Press any key to continue.")
Console.ReadLine()
End Sub
' The following method determines the server endpoint and then
' serializes it to obtain the related SocketAddress object.
' Note that in the for loop a temporary socket is created to ensure that
' the current IP address format matches the AddressFamily type.
' In fact, in the case of servers supporting both IPv4 and IPv6, an exception
' may arise if an IP address format does not match the address family type.
Private Shared Function getSocketAddress(ByVal server As String, ByVal port As Integer) As SocketAddress
Dim tempSocket As Socket = Nothing
Dim host As IPHostEntry = Nothing
Dim serializedSocketAddress As SocketAddress = Nothing
Try
' Get the object containing Internet host information.
host = Dns.Resolve(server)
' Obtain the IP address from the list of IP addresses associated with the server.
Dim address As IPAddress
For Each address In host.AddressList
Dim endpoint As New IPEndPoint(address, port)
tempSocket = New Socket(endpoint.AddressFamily, SocketType.Stream, ProtocolType.Tcp)
tempSocket.Connect(endpoint)
If tempSocket.Connected Then
' Display the endpoint information.
displayEndpointInfo(endpoint)
' Serialize the endpoint to obtain a SocketAddress object.
serializedSocketAddress = serializeEndpoint(endpoint)
Exit For
End If
Next address
'Close the temporary socket.
tempSocket.Close()
Catch e As SocketException
Console.WriteLine(("Source : " + e.Source))
Console.WriteLine(("Message : " + e.Message))
Catch e As Exception
Console.WriteLine(("Source : " + e.Source))
Console.WriteLine(("Message : " + e.Message))
End Try
Return serializedSocketAddress
End Function 'getSocketAddress
' The requestServerHomePage obtains the server's home page and returns
' its content.
Private Shared Function requestServerHomePage(ByVal server As String, ByVal port As Integer) As String
Dim strRetPage As [String] = Nothing
' Get a socket address using the specified server and port.
Dim socketAddress As SocketAddress = getSocketAddress(server, port)
If socketAddress Is Nothing Then
strRetPage = "Connection failed"
' Obtain the server's home page content.
Else
strRetPage = getPage(server, socketAddress)
End If
Return strRetPage
End Function 'requestServerHomePage
' Show to the user how to use this program when wrong input parameters are entered.
Private Shared Sub showusage()
Console.WriteLine("Enter the server name as follows:")
Console.WriteLine(ControlChars.Tab + "vb_ipendpoint servername")
End Sub
' This is the program entry point. It allows the user to enter
' a server name that is used to locate its current homepage.
Public Shared Sub Main(ByVal args() As String)
Dim host As String = Nothing
Dim port As Integer = 80
'Define a regular expression to parse user's input.
'This is a security check. It allows only
'alphanumeric input string between 2 to 40 character long.
Dim rex As New Regex("^[a-zA-Z]\w{1,39}$")
If args.Length = 0 Then
' Show how to use this program.
showusage()
Else
host = args(0)
If ((rex.Match(host)).Success) Then
' Get the specified server home_page and display its content.
Dim result As String = requestServerHomePage(host, port)
Console.WriteLine(result)
Else
Console.WriteLine("Input string format not allowed.")
End If
End If
End Sub
End Class
End Module
End Namespace
Комментарии
Класс IPEndPoint содержит сведения об узле и локальном или удаленном порту, необходимые приложению для подключения к службе на узле. Объединяя IP-адрес узла и номер порта службы, IPEndPoint класс формирует точку подключения к службе.
Конструкторы
IPEndPoint(Int64, Int32) |
Инициализирует новый экземпляр класса IPEndPoint с заданными адресом и номером порта. |
IPEndPoint(IPAddress, Int32) |
Инициализирует новый экземпляр класса IPEndPoint с заданными адресом и номером порта. |
Поля
MaxPort |
Определяет максимальное значение, которое может присваиваться свойству Port. Значение MaxPort установлено равным 0x0000FFFF. Это поле доступно только для чтения. |
MinPort |
Определяет минимальное значение, которое может присваиваться свойству Port. Это поле доступно только для чтения. |
Свойства
Address |
Возвращает или задает IP-адрес конечной точки. |
AddressFamily |
Возвращает семейство IP-адресов. |
Port |
Возвращает или задает номер порта конечной точки. |
Методы
Create(SocketAddress) |
Создает конечную точка по адресу сокета. |
Equals(Object) |
Определяет, равен ли указанный объект Object текущему объекту Object. |
GetHashCode() |
Возвращает хэш-значение для экземпляра IPEndPoint. |
GetType() |
Возвращает объект Type для текущего экземпляра. (Унаследовано от Object) |
MemberwiseClone() |
Создает неполную копию текущего объекта Object. (Унаследовано от Object) |
Parse(ReadOnlySpan<Char>) |
Преобразует конечную точку IP-сети (адрес и порт), представленную в виде диапазона, доступного только для чтения, в экземпляр IPEndPoint. |
Parse(String) |
Преобразует конечную точку IP-сети (адрес и порт), представленную в виде строки, в экземпляр IPEndPoint. |
Serialize() |
Выводит в последовательном виде сведения о конечной точке в экземпляр класса SocketAddress. |
ToString() |
Возвращает IP-адрес и номер порта заданной конечной точки. |
TryParse(ReadOnlySpan<Char>, IPEndPoint) |
Пытается преобразовать конечную точку IP-сети (адрес и порт), представленную в виде диапазона, доступного только для чтения, в его эквивалент IPEndPoint и возвращает значение, указывающее, было ли выполнено преобразование. |
TryParse(String, IPEndPoint) |
Пытается преобразовать конечную точку IP-сети (адрес и порт), представленную в виде строки, в ее эквивалент IPEndPoint и возвращает значение, указывающее, было ли выполнено преобразование. |