TCP / IP頭文件的組織

Question

有人可以解釋為什么這樣組織TCP / IP頭文件。

在ubuntu-14.04上的libc6-dev ：

arpa/
netinet/
x86-64-linux-gnu/
...

為什么？

Answer 1

我從Wiki找到了答案。

<sys/socket.h> Core BSD socket functions and data structures.

<netinet/in.h> AF INET and AF INET6 address families and their corresponding protocol families PF_INET and PF_INET6. Widely used on the Internet, these include IP addresses and TCP and UDP port numbers.

<sys/un.h> PF_UNIX/PF_LOCAL address family. Used for local communication between programs running on the same computer. Not used on networks.

<arpa/inet.h> Functions for manipulating numeric IP addresses.

<netdb.h> Functions for translating protocol names and host names into numeric addresses. Searches local data as well as DNS.

http://en.wikipedia.org/wiki/Berkeley_sockets#Header_files