linux/if.h和net/if.h有什么区别? [英] What is the difference between linux/if.h and net/if.h?

问题描述

评论说， net/if.h 是GNU C库的一部分，而 linux/if.h 则说它是"TCP/IP的实现.LINUX操作系统的协议套件."

The comments say that net/if.h is part of the GNU C Library and linux/if.h says it is "An implementation of the TCP/IP protocol suite for the LINUX operating system."

但是为什么有两个?每个都有什么用?

But why are there two of them and what is the use of each one?

推荐答案

最初，两者都提供数据结构来管理网络接口. linux/if.h 与与Linux内核网络的交互特别相关.接口.实际上，它是在文件开头声明的:

Initially, both provide data structures to manage network interfaces.linux/if.h is specifically more related to interact with Linux kernel's network interfaces. Actually, it states so at the beginning of the file:

/*
 * INET     An implementation of the TCP/IP protocol suite for the LINUX
 *      operating system.  INET is implemented using the  BSD Socket
 *      interface as the means of communication with the user level.
 *
 *      Global definitions for the INET interface module.
 */

net/if.h 是glibc出于相同目的的文件，最初主要是用户空间.

net/if.h is glibc's file for same purpose and is initially more user space focused.

重要的是要注意，如果您要同时使用两者(它们共享一些结构，但不是全部)，则包含顺序非常重要，建议在大多数情况下建议包含 linux/if.h 在 net/if.h 之前.

Is important to note that, if you're going to use both (they share some structures but not all), include order is quite important, suggesting, in most cases, to include linux/if.h before net/if.h.

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