htonl, htons, ntohl, ntohs - convert values between host and network
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 machines such as the SUN 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 gethostent(3N) and getservent(3N).
The VAX handles bytes backwards from most everyone else in the world.
This is not expected to be fixed in the near future.
4th Berkeley Distribution 4 March 1983 BYTEORDER(3N)