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FreeBSD 11.0 - man page for byteorder (freebsd section 3)

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BYTEORDER(3)			   BSD Library Functions Manual 		     BYTEORDER(3)

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

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <arpa/inet.h>

     or

     #include <netinet/in.h>

     uint32_t
     htonl(uint32_t hostlong);

     uint16_t
     htons(uint16_t hostshort);

     uint32_t
     ntohl(uint32_t netlong);

     uint16_t
     ntohs(uint16_t netshort);

DESCRIPTION
     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).

SEE ALSO
     gethostbyname(3), getservent(3), byteorder(9)

STANDARDS
     The byteorder functions conform to IEEE Std 1003.1-2001 (``POSIX.1'').

HISTORY
     The byteorder functions appeared in 4.2BSD.

BUGS
     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.

BSD					  March 20, 2005				      BSD
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