有人可以发布一个简单的C或C ++ TCP服务器和客户端示例吗？ [英] Could someone post a simple C or C++ TCP server and client example?

问题描述

我需要快速实现一个非常小的C或C ++ TCP服务器/客户端解决方案。这只是简单地将字节数组从一台计算机传输到另一台计算机 - 不需要可扩展/过于复杂。越简单越好。

我试图使用本教程中的代码，但是我无法在Linux中使用g ++编译： http://www.linuxhowtos.org/C_C++/socket.htm

如果可能，我想避免第三方库，因为我运行这个系统是相当受限制。

由于 emg-2 的答案，我设法使得上述代码示例与C ++兼容，使用以下步骤：

将这些头文件添加到客户端和服务器：

<$ $ p> #include< cstdlib>
#include< cstring>
#include< unistd.h>


在 server.c ，将clilen的类型更改为socklen_t。

  int sockfd，newsockfd，portno / *，clilen * /; 
 socklen_t clilen; 
  

在 client.c ，更改以下行：

  if（connect（sockfd，& serv_addr ，sizeof（serv_addr））< 0）{...} 
  

  if（connect（sockfd，（const sockaddr *）& serv_addr，sizeof（serv_addr））< 0）
  




解决方案

我使用了 Beej的网络编程指南。它在C，而不是C ++，但例子是好的。直接访问第6部分，了解简单的客户端和服务器示例程序。

I need to quickly implement a very small C or C++ TCP server/client solution. This is simply to transfer literally an array of bytes from one computer to another - doesn't need to be scalable / over-complicated. The simpler the better. Quick and dirty if you can.

I tried to use the code from this tutorial, but I couldn't get it to build using g++ in Linux: http://www.linuxhowtos.org/C_C++/socket.htm

If possible, I'd like to avoid 3rd party libraries, as the system I'm running this on is quite restricted. This must be C or C++ as the existing application is already implemented.

Thanks to emg-2's answer, I managed to make the above mentioned code sample compatible with C++ using the following steps:

Add these headers to both client and server:

#include <cstdlib>
#include <cstring>
#include <unistd.h>

In server.c, change the type of clilen to socklen_t.

int sockfd, newsockfd, portno/*, clilen*/;
socklen_t clilen;

In client.c, change the following line:

if (connect(sockfd,&serv_addr,sizeof(serv_addr)) < 0) { ... }

To:

if (connect(sockfd,(const sockaddr*)&serv_addr,sizeof(serv_addr)) < 0)

解决方案

I've used Beej's Guide to Network Programming in the past. It's in C, not C++, but the examples are good. Go directly to section 6 for the simple client and server example programs.

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