BYTEORDER(3N)           COMMAND REFERENCE           BYTEORDER(3N)



NAME
     byteorder, htonl, htons, ntohl, ntohs - convert values
     between host and network byte order

SYNOPSIS
     #include <sys/types.h>
     #include <netinet/in.h>

     netlong = htonl(hostlong);
     ulong netlong, hostlong;

     netshort = htons(hostshort);
     ushort netshort, hostshort;

     hostlong = ntohl(netlong);
     ulong hostlong, netlong;

     hostshort = ntohs(netshort);
     ushort hostshort, netshort;

DESCRIPTION
     These routines convert 16 and 32-bit quantities between
     network byte order and host byte order.  On machines such as
     the Tektronix 4300 series workstations, these routines are
     defined as null macros in the include file <netinet/in.h>.

     These routines are most often used in conjunction with
     Internet addresses and ports as returned by gethostent(3n)
     and getservent(3n).

CAVEATS
     The VAX handles bytes backwards from almost everyone else in
     the world.  This is not expected to be fixed in the near
     future.

SEE ALSO
     gethostent(3n) and getservent(3n).


















Printed 3/13/89                                                 1

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