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, routines are defined as null macros.
These routines are most often used in conjunction with Internet addresses
and ports as returned by gethostbyname(3) and getservent(3).
The byteorder functions conform to IEEE Std 1003.1-2001 (``POSIX.1'').
The byteorder functions appeared in 4.2BSD.
On the VAX bytes are handled backwards from most everyone else in the
world. This is not expected to be fixed in the near future.
FreeBSD 5.2.1 May 11, 2002 FreeBSD 5.2.1 [ Back ]