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);
u_long netlong, hostlong;

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

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

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

DESCRIPTION

These routines convert 16 and 32 bit quantities between network byte order and host byte order.  On Sun-2, Sun-3 and Sun-4 systems, these routines are defined as NULL macros in the include file <netinet/in.h>.  On Sun386i systems, these routines are functional since its host byte order is different from network byte order. 

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

SEE ALSO

gethostent(3N), getservent(3N)

Sun Release 4.1  —  Last change: 18 February 1988