ethers man page on Ultrix

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ethers(3n)							    ethers(3n)

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

Syntax
       #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;

Arguments
       The structure is defined as:
       struct ether_addr {
	       u_char  ether_addr_octet[6];
       };

Description
       These routines are useful for mapping 48 bit Ethernet numbers to	 their
       ASCII  representations  or  their  corresponding	 host  names, and vice
       versa.  The mapping is obtained from the database; see

       The function 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 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  maps an Ethernet number (pointed to by e) to its associ‐
       ated hostname.  The string pointed to by must be long  enough  to  hold
       the hostname and a NULL character.  The function returns zero upon suc‐
       cess and non-zero upon failure.	Inversely, the function 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.

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

Files
       See Also
	      packetfilter(4), ethers(5), rarpd(8c)

								    ethers(3n)
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