minix/lib/libc/net/byteorder.3
Lionel Sambuc f14fb60209 Libraries updates and cleanup
* Updating common/lib
 * Updating lib/csu
 * Updating lib/libc
 * Updating libexec/ld.elf_so
 * Corrected test on __minix in featuretest to actually follow the
   meaning of the comment.
 * Cleaned up _REENTRANT-related defintions.
 * Disabled -D_REENTRANT for libfetch
 * Removing some unneeded __NBSD_LIBC defines and tests

Change-Id: Ic1394baef74d11b9f86b312f5ff4bbc3cbf72ce2
2013-01-14 11:36:26 +01:00

80 lines
2.8 KiB
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.\" $NetBSD: byteorder.3,v 1.15 2011/05/03 04:07:39 jruoho Exp $
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.\" @(#)byteorder.3 8.1 (Berkeley) 6/4/93
.\"
.Dd May 3, 2011
.Dt BYTEORDER 3
.Os
.Sh NAME
.Nm htonl ,
.Nm htons ,
.Nm ntohl ,
.Nm ntohs
.Nd convert values between host and network byte order
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In arpa/inet.h
.Ft uint32_t
.Fn htonl "uint32_t host32"
.Ft uint16_t
.Fn htons "uint16_t host16"
.Ft uint32_t
.Fn ntohl "uint32_t net32"
.Ft uint16_t
.Fn ntohs "uint16_t net16"
.Sh DESCRIPTION
These routines convert 16 and 32 bit quantities between network
byte order and host byte order.
.Pp
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
their argument.
.Pp
These routines are most often used in conjunction with Internet
addresses and ports as returned by
.Xr gethostbyname 3
and
.Xr getservent 3 .
.Sh SEE ALSO
.Xr bswap 3 ,
.Xr gethostbyname 3 ,
.Xr getservent 3
.Sh STANDARDS
The described functions conform to
.St -p1003.1-2001 .
.Sh HISTORY
The
.Nm byteorder
functions appeared in
.Bx 4.2 .
.Sh BUGS
The `l' and `s' suffixes in the names are not meaningful in machines
where long integers are not 32 bits.