WinSock API 常用函数

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WinSock API 常用函数

WinSocks提供了许多嵌接字函数，他们并不代表协议的某一个层次，其实质就是一组网络编程接口，用户利用这些函数就能很容易地进行编程了。

1 accept函数

语法

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s:是一个套接字，它应处于监听状态

addr: 是一个sockaddr_in结构指针，包含一株客户端的端口号、IP地址等信息

addrlen:用于接手参数addr的长度。

返回值：一个新的嵌接字，它对应于已经接受的客户端连接，对于该客户端的所有后续操作，都应使用这个新的套接字。

2 bind函数

语法

<!--[if gte vml 1]><v:shape id="_x0000_s1027" type="#_x0000_t202" style='position:absolute;left:0; text-align:left;margin-left:0;margin-top:30.15pt;width:414pt;height:84.75pt; text-indent:0;z-index:2;mso-position-horizontal:absolute; mso-position-horizontal-relative:text;mso-position-vertical:absolute; mso-position-vertical-relative:text' fillcolor="silver"> <v:textbox> <![if !mso]> <table cellpadding=0 cellspacing=0 width="100%"> <tr> <td><![endif]> <div> <p class=MsoNormal><span lang=EN-US>int bind</span><span style='font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>（</span></p> <p class=MsoNormal><span lang=EN-US><span style='mso-spacerun:yes'> </span><span style='mso-spacerun:yes'></span>SOCKET s,</span></p> <p class=MsoNormal><span lang=EN-US><span style='mso-spacerun:yes'> </span>Const struct sockaddr FAR* name,</span></p> <p class=MsoNormal><span lang=EN-US><span style='mso-spacerun:yes'> </span>Int namelen</span></p> <p class=MsoNormal><span lang=EN-US>);</span></p> </div> <![if !mso]></td> </tr> </table> <![endif]></v:textbox> <w:wrap type="square"/> </v:shape><![endif]--><!--[if !vml]--><!--[endif]-->

s: 是一个套接字。

name: 是一个sockaddr结构指针，该结构中包含了要结合的地址和端口号。

namelen:确定name缓冲区的长度。

返回值：如果函数执行成功，返回值为0，否则为SOCKET_ERROR。

在定义一个套接字后，需要调用bind函数为其指定本机地址、协议和端口号。