BYTEORDER(3) Library Functions Manual BYTEORDER(3)
htonl, htons, ntohl, ntohs -- convert values between host and network
Standard C Library (libc, -lc)
These routines convert 16 and 32 bit quantities between network byte
order and host byte order.
On machines which have a byte order which is the same as the network
order, these routines are defined as macros that expand to the value of
These routines are most often used in conjunction with Internet addresses
and ports as returned by gethostbyname(3) and getservent(3).
bswap(3), gethostbyname(3), getservent(3)
The described functions conform to IEEE Std 1003.1-2001 (``POSIX.1'').
The byteorder functions appeared in 4.2BSD.
The `l' and `s' suffixes in the names are not meaningful in machines
where long integers are not 32 bits.
NetBSD 6.1.5 May 3, 2011 NetBSD 6.1.5