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    °ó¶¨±¾»ú¶Ë¿Ú£º bind£¨£©
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    Êý¾Ý´«Ê䣺 send£¨£©£¬ recv£¨£©
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    struct sockaddr
    {
       unsigned short  sa_family;   //µØÖ·×壬 Ò»°ãΪAF_INET
       char                  sa_data[14];   //14×Ö½ÚµÄЭÒ鵨ַ
    }
    struct sockaddr_in
    {
       short int                     sin_family;   //µØÖ·×å
       unsigned short int      sin_port;      //¶Ë¿ÚºÅ
       struct in_addr             in_addr;      //ipµØÖ·
       unsigned char             sin_zero[8];  //Ìî³ä
    }
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    1 socket()
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       #include <sys/types.h>
       #include <sys/socket.h>
  


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