What are the implementation methods of TCP and UDP in Go language?

The Go language is an open source programming language developed by Google and launched in 2009. It has been widely used in the field of network programming since its birth. In the Go language, TCP and UDP are two very important network protocols, which are widely used in the field of network communication. This article will introduce the implementation of TCP and UDP in Go language.

TCP implementation method

In the Go language, implementing the TCP protocol is mainly divided into the following steps:

1. Create a listener

In Go, we can use the net package for network programming. For the TCP protocol, we can use net.Listen() to create a listener on the server, which will listen to the specified local address and port number, waiting for the client's connection.

2. Accept client connections

After the listener is created, we can use net.Accept() to accept the client's connection request. The Accept() method returns a net.Conn object that represents the connection between the client and the server.

3. Reading and writing data

Once the client connection is successfully established, we can use the Read() method of the net.Conn object to read the data sent by the client. data, you can also use the Write() method to send data to the client.

4. Close the connection

When the client no longer needs to communicate with the server, it can use the Close() method of net.Conn to close the connection with the server. .

UDP implementation method

The way to implement the UDP protocol in the Go language is simpler than TCP. We only need to perform the following steps:

1. Create a UDP connection

In Go, we can also use the net package to implement the UDP protocol. You can use the net.ListenUDP() or net.DialUDP() method to create a UDP connection.

2. Reading and writing data

Once the UDP connection is successfully established, we can use the ReadFrom() method of net.PacketConn to read the data sent by the client , you can also use the WriteTo() method to send data to the client.

3. Close the connection

When the client no longer needs to communicate with the server, it can use the Close() method of net.PacketConn to close the connection with the server. .

Summary

In the Go language, TCP and UDP are two very commonly used protocols, and they can both be implemented using the net package. In comparison, the implementation of TCP is slightly more complicated and requires establishing a connection, transmitting data, and closing the connection. The implementation of UDP is simpler, and only needs to establish a connection, read and write data, and close the connection. By mastering the implementation of TCP and UDP, we can become more comfortable writing network programs in Go.

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