ETHERS(3N)              COMMAND REFERENCE              ETHERS(3N)



NAME
     ethers, ether_ntoa, ether_aton, ether_ntohost,
     ether_hostton, ether_line - Ethernet address mapping
     operations

SYNOPSIS
     #include <sys/types.h>
     #include <sys/socket.h>
     #include <net/if.h>
     #include <netinet/in.h>
     #include <netinet/if_ether.h>
     char *
     ether_ntoa(e)
          struct ether_addr *e;
     struct ether_addr *
     ether_aton(s)
          char *s;
     ether_ntohost(hostname, e)
          char *hostname;
          struct ether_addr *e;
     ether_hostton(hostname, e)
          char *hostname;
          struct ether_addr *e;
     ether_line(l, e, hostname)
          char *l;
          struct ether_addr *e;
          char *hostname;

DESCRIPTION
     These routines are useful for mapping 48 bit Ethernet
     numbers to their ASCII representations or their
     corresponding host names, and vice versa.

     The function ether_ntoa converts a 48-bit Ethernet number
     pointed to by e to its standard ACSII representation; it
     returns a pointer to the ASCII string.  The representation
     is of the form: x:x:x:x:x:x where x is a hexadecimal number
     between 0 and ff.  The function ether_aton converts an ASCII
     string in the standard representation back to a 48-bit
     Ethernet number;  the function returns NULL if the string
     cannot be scanned successfully.

     The function ether_ntohost maps an Ethernet number (pointed
     to by e) to its associated host name.  The string pointed to
     by hostname must be long enough to hold the host name and a
     null character.  The function returns zero upon success and
     non-zero upon failure.  Inversely, the function
     ether_hostton maps a host name string to its corresponding
     Ethernet number; the function modifies the Ethernet number
     pointed to by e.  The function also returns zero upon
     success and non-zero upon failure.




Printed 3/13/89                                                 1

ETHERS(3N)              COMMAND REFERENCE              ETHERS(3N)



     The function ether_line scans a line (pointed to by l) and
     sets the host name and the Ethernet number (pointed to by
     e).  The string pointed to by hostname must be long enough
     to hold the host name and a null character.  The function
     returns zero upon success and non-zero upon failure.  The
     format of the scanned line is described by ethers(5).

FILES
     /etc/ethers    Or the Yellow Pages' maps ethers.byaddr and
                    ethers.byname

SEE ALSO
     ethers(5).










































Printed 3/13/89                                                 2

%%index%%
na:312,172;
sy:484,4301;
de:4785,1831;7000,511;
fi:7511,221;
se:7732,148;
%%index%%000000000107