Name

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

Syntax

#include <sys/types.h>
#include </bsd/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. These routines are defined as null macros in the include file < netinet/in.h >. 

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

See Also

gethostbyname(3n), getservent(3n)