使用 C 的套接字编程中的双向通信 [英] Two-way communication in socket programming using C

问题描述

我对套接字编程有一点疑问.我能够将我的数据从客户端发送到服务器，我的服务器处理数据.处理过的数据的o/p，我想发回给我的客户.那么我们可以使用同一个套接字将数据写"回客户端吗?我的意思是服务器在接受连接和接收数据之前在端口上侦听，所以同样，我是否需要让我的客户端侦听其他端口(将其绑定到其他套接字)并使我的服务器连接到该套接字并将数据传回.任何类型的示例或解释或参考将不胜感激.提前非常感谢.

I have a small doubt in socket programming. i am able to send my data from client to server and my server processes the data. The o/p of the data processed, I want to send back to my client. So can we "write" the data back to the client using the same socket. I mean a server listens on a port before accepting connection and receiving data, so similarly, do i need to make my client listen to some other port (bind it some other socket) and make my server connect to that socket and transfer the data back. Any kind of example or explanation or references would be appreciated. Thanks a lot in advance.

推荐答案

查看 Beej 的网络编程指南 首先.

服务器/客户端连接的基本脚本如下所示:

The basic screenplay of a server/client connection goes like this:

• 服务器 listen()s 在固定端口上，具有给定的套接字.
• 客户端connect()s 到服务器端口；客户端获得一个套接字.
• 服务器accept()s 连接，accept() 为连接返回一个new 套接字.
• (服务器继续使用原始套接字侦听原始端口.)

• Server listen()s on a fixed port, with a given socket.
• Client connect()s to a the server port; client obtains a socket.
• Server accept()s the connection, and accept() returns a new socket for the connection.
• (Server continues listening on the original port with the original socket.)

对于与客户端的具体连接，服务器write()s 到它在accept()ing 传入连接时获得的新套接字.一个繁忙的服务器会有很多很多的套接字，但它只需要 bind() 到一个端口.所有连接都进入该端口，但操作系统的网络协议栈将数据分离并使其在特定连接的套接字上可用.

For the specific connection with the client, the server write()s to the new socket it obtained when accept()ing the incoming connection. A busy server will have many, many sockets, but it will only ever need to bind() to one port. All connections come in to that one port, but the OS's networking protocol stack separates the data and makes it available at the connection-specific socket.

这篇关于使用 C 的套接字编程中的双向通信的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！