struct sockaddr_un v / s sockaddr - C（Linux） [英] struct sockaddr_un v/s sockaddr - C(Linux)

问题描述

struct sockaddr 与 struct sockaddr_un 不同？

我知道我们在客户端使用这些结构-server模块，用于将套接字绑定到套接字地址。我们使用一个cast操作符来接受struct sockaddr_un。

I know that we use these structures in client-server modules,for binding the socket to the socket address.And we use a cast operator for it to accept struct sockaddr_un.

我想知道如何不同/他们，为什么是转换操作符？

I want to know how different/similar are they,and why the cast operator?

推荐答案

struct sockaddr是一个通用定义。

"struct sockaddr" is a generic definition. It's used by any socket function that requires an address.

struct sockaddr_un（一个Unix套接字地址）是一种特定类型的地址族。

"struct sockaddr_un" (a "Unix sockets" address) is a specific kind of address family.

更常见的struct sockaddr_in（一个Internet套接字地址）是另一种特定类型的地址族。

The more commonly seen "struct sockaddr_in" (an "Internet socket" address) is another specific kind of address family.

该转换是允许套接字API接受实际上是几个不同实际类型中的任何一个的通用参数类型。

The cast is what allows the sockets APIs to accept a common parameter type that will actually be any one of several different actual types.

这是一个很好的链接，显示几个不同的地址家庭定义：

Here's a good link that shows several different address family definitions:

http://www.cas.mcmaster.ca/~qiao/courses/cs3mh3/tutorials/socket.html

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