BYTEORDER(3)              386BSD Programmer's Manual              BYTEORDER(3)

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

SYNOPSIS
     #include <sys/param.h>

     u_long
     htonl(u_long hostlong)

     u_short
     htons(u_short hostshort)

     u_long
     ntohl(u_long netlong)

     u_short
     ntohs(u_short netshort)

DESCRIPTION
     These routines convert 16 and 32 bit quantities between network byte
     order and host byte order.  On machines which have a byte order which is
     the same as the network order, routines are defined as null macros.

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

SEE ALSO
     gethostbyname(3),  getservent(3)

HISTORY
     The byteorder functions appeared in 4.2BSD.

BUGS
     On the VAX bytes are handled backwards from most everyone else in the
     world.  This is not expected to be fixed in the near future.

4.2 Berkeley Distribution       April 19, 1991                               1