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ether_hostton (3)
  • ether_hostton (3) ( FreeBSD man: Библиотечные вызовы )
  • ether_hostton (3) ( Русские man: Библиотечные вызовы )
  • >> ether_hostton (3) ( Linux man: Библиотечные вызовы )
  •  

    NAME

    ether_aton, ether_ntoa, ether_ntohost, ether_hostton, ether_line,
    ether_ntoa_r, ether_aton_r - Ethernet address manipulation routines
     
    

    SYNOPSIS

    #include <netinet/ether.h>
    
    char *ether_ntoa(const struct ether_addr *addr);
    
    struct ether_addr *ether_aton(const char *asc);
    
    int ether_ntohost(char *hostname, const struct ether_addr *addr);
    
    int ether_hostton(const char *hostname, struct ether_addr *addr);
    
    int ether_line(const char *line, struct ether_addr *addr,
                   char *hostname);
    
    /* GNU extensions */
    
    char *ether_ntoa_r(const struct ether_addr *addr, char *buf); struct ether_addr *ether_aton_r(const char *asc, struct ether_addr *addr);
     

    DESCRIPTION

    ether_aton() converts the 48-bit Ethernet host address asc from the standard hex-digits-and-colons notation into binary data in network byte order and returns a pointer to it in a statically allocated buffer, which subsequent calls will overwrite. ether_aton() returns NULL if the address is invalid.

    The ether_ntoa() function converts the Ethernet host address addr given in network byte order to a string in standard hex-digits-and-colons notation, omitting leading zeros. The string is returned in a statically allocated buffer, which subsequent calls will overwrite.

    The ether_ntohost() function maps an Ethernet address to the corresponding hostname in /etc/ethers and returns non-zero if it cannot be found.

    The ether_hostton() function maps a hostname to the corresponding Ethernet address in /etc/ethers and returns non-zero if it cannot be found.

    The ether_line() function parses a line in /etc/ethers format (ethernet address followed by whitespace followed by hostname; aq#aq introduces a comment) and returns an address and hostname pair, or non-zero if it cannot be parsed. The buffer pointed to by hostname must be sufficiently long, for example, have the same length as line.

    The functions ether_ntoa_r() and ether_aton_r() are reentrant thread-safe versions of ether_ntoa() and ether_aton() respectively, and do not use static buffers.

    The structure ether_addr is defined in <net/ethernet.h> as:

    struct ether_addr {
        uint8_t ether_addr_octet[6];
    }
    
     

    CONFORMING TO

    4.3BSD, SunOS.  

    BUGS

    The glibc 2.2.5 implementation of ether_line() is broken.  

    SEE ALSO

    ethers(5)  

    COLOPHON

    This page is part of release 3.14 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    CONFORMING TO
    BUGS
    SEE ALSO
    COLOPHON


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