NAME
htonl(), htons(), ntohl(), ntohs() — convert values between host and network byte order
SYNOPSIS
#include <netinet/in.h>
_XOPEN_SOURCE_EXTENDED only
#include <arpa/inet.h>
unsigned long htonl(unsigned long hostlong);
unsigned short htons(unsigned short hostshort);
unsigned long ntohl(unsigned long netlong);
unsigned short ntohs(unsigned short netshort);
DESCRIPTION
These routines convert 16- and 32-bit quantities
between network byte order and host byte order.
On HP-UX systems, network and host byte orders are identical,
so these routines are defined as null macros in the include file
<netinet/in.h>.
If
_XOPEN_SOURCE_EXTENDED
is defined then these routines are defined
in the include file
<arpa/inet.h>.
These routines are most often used
in conjunction with Internet addresses and ports as returned by
gethostent()
and
getservent()
(see
gethostent(3N)
and
getservent(3N)).
Use these routines to write portable programs.
AUTHOR
byteorder()
was developed by the University of California, Berkeley.
STANDARDS CONFORMANCE
byteorder(): XPG4
Printable version
