在bind系统调用函数中。

In the bind system call function.

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操作系统通过定义系统调用函数以及相应的接口，实现系统对硬件函数调用的支持，使程序设计者能够像调用普通库函数一样调用硬件函数。

The operating system defines necessary system calls and interfaces to support the calling of hardware functions which follows the same semantic as calling software functions.

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本文对套接口编程中的一些核心概念进行了分析。这些概念涉及到套接口的建立机制、传输层端口号、协议地址、套接口系统调用函数调用等概念。

This paper has analysed some important concept in UNIX socket programing. These concepts touch upon socket creating, transport layer port, protocol address, socket function call, etc.

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