BYTEORDER(3)             BSD Library Functions Manual             BYTEORDER(3)

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

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     ##include <>

     uint32t
     htonl(uint32t hostlong);

     uint16t
     htons(uint16t hostshort);

     uint32t
     ntohl(uint32t netlong);

     uint16t
     ntohs(uint16t 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)

STANDARDS
     The byteorder functions are expected to conform with IE Std
     POSIX.1-200x (``POSIX.1'').

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.

BSD                              June 4, 1993                              BSD