Calls the Start method to start listening on the port.Creates an IPEndPoint with IPAddress.Any and port.Var message = (buffer, 0, received) Ĭonsole.WriteLine($"Message received: \"\"") Int received = await stream.ReadAsync(buffer) The following example demonstrates setting up a TcpClient to connect to a time server on TCP port 13: var ipEndPoint = new IPEndPoint(ipAddress, 13) Īwait using NetworkStream stream = client.GetStream()
#PACKET SENDER TUTRIAL HOW TO#
Knowing how to get an IPEndPoint, let's assume you have an IPAddress to pair with your desired port number. TcpClient is used to create a client connection to a remote host. The TcpClient class provides TCP services at a higher level of abstraction than the Socket class. IPEndPoint ipEndPoint = new(ipAddress, 11_000) Īfter determining the address of the remote device and choosing a port to use for the connection, the app can establish a connection with the remote device.
#PACKET SENDER TUTRIAL CODE#
The following code combines the IP address for with a port number to create a remote endpoint for a connection. Other services can have registered port numbers in the range 1,024 to 65,535. For more information, see IANA: Service Name and Transport Protocol Port Number Registry). The Internet Assigned Numbers Authority (IANA) defines port numbers for common services.
#PACKET SENDER TUTRIAL MANUAL#
IPAddress ipAddress = ipHostInfo.AddressList įor manual testing and debugging purposes, you can typically use the GetHostEntryAsync method to get given the Dns.GetHostName() value to resolve the localhost name to an IP address. IPHostEntry ipHostInfo = await Dns.GetHostEntryAsync("") The following code gets an IPAddress containing the IP address for the server. In most cases, you can use the first address returned in the AddressList array. GetHostEntryAsync returns a Task that when awaited contains a list of addresses and aliases for the requested name. The GetHostEntryAsync method queries a DNS server to map a user-friendly domain name (such as "") to a numeric Internet address (such as 192.168.1.1). The Dns class provides domain-name services to apps that use TCP/IP internet services. A descendant of EndPoint is defined for each supported address family for the IP address family, the class is IPEndPoint. The combination of network address and service port is called an endpoint, which is represented in the. The network address identifies a specific network destination the port number identifies the specific service on that device to connect to. TCP/IP uses a network address and a service port number to uniquely identify a service. Before you can initiate a conversation through a Socket, you create a data pipe between your app and the remote destination. The IPEndPoint is constructed with an IPAddress and its corresponding port number. When working with, you represent a network endpoint as an IPEndPoint object. TCP is responsible for ensuring that data packets are sent to the endpoint and assembled in the correct order when they arrive. The TCP protocol establishes a connection with a remote endpoint and then uses that connection to send and receive data packets. NET Framework stream-handling techniques. Because the connection to the remote device is represented as a stream, data can be read and written with. The methods and properties of TcpClient abstract the details for creating a Socket for requesting and receiving data using TCP. The TcpClient class requests data from an internet resource using TCP. The NetworkStream does not own the protocol classes' underlying socket, so closing it does not affect the socket. You use the GetStream method to return the network stream, and then call the stream's NetworkStream.ReadAsync and NetworkStream.WriteAsync methods.
TcpClient and TcpListener represent the network using the NetworkStream class.
To access features of the Socket class not exposed by the protocol classes, you must use the Socket class. To use asynchronous Socket methods, you can use the asynchronous methods supplied by the NetworkStream class. The protocol classes use the underlying Socket class to provide simple access to network services without the overhead of maintaining state information or knowing the details of setting up protocol-specific sockets. TcpClient and TcpListener are built on top of the class and take care of the details of transferring data for ease of use. To work with Transmission Control Protocol (TCP), you have two options: either use Socket for maximum control and performance, or use the TcpClient and TcpListener helper classes. The Socket class is highly recommended for advanced users, instead of TcpClient and TcpListener.
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