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Manual page for BYTEORDER(3N)

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


#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;


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


gethostent.3n getservent.3n

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Created by unroff & hp-tools. © by Hans-Peter Bischof. All Rights Reserved (1997).

Last modified 21/April/97