1*f14fb602SLionel Sambuc.\" $NetBSD: byteorder.3,v 1.15 2011/05/03 04:07:39 jruoho Exp $ 22fe8fb19SBen Gras.\" 32fe8fb19SBen Gras.\" Copyright (c) 1983, 1991, 1993 42fe8fb19SBen Gras.\" The Regents of the University of California. All rights reserved. 52fe8fb19SBen Gras.\" 62fe8fb19SBen Gras.\" Redistribution and use in source and binary forms, with or without 72fe8fb19SBen Gras.\" modification, are permitted provided that the following conditions 82fe8fb19SBen Gras.\" are met: 92fe8fb19SBen Gras.\" 1. Redistributions of source code must retain the above copyright 102fe8fb19SBen Gras.\" notice, this list of conditions and the following disclaimer. 112fe8fb19SBen Gras.\" 2. Redistributions in binary form must reproduce the above copyright 122fe8fb19SBen Gras.\" notice, this list of conditions and the following disclaimer in the 132fe8fb19SBen Gras.\" documentation and/or other materials provided with the distribution. 142fe8fb19SBen Gras.\" 3. Neither the name of the University nor the names of its contributors 152fe8fb19SBen Gras.\" may be used to endorse or promote products derived from this software 162fe8fb19SBen Gras.\" without specific prior written permission. 172fe8fb19SBen Gras.\" 182fe8fb19SBen Gras.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 192fe8fb19SBen Gras.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 202fe8fb19SBen Gras.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 212fe8fb19SBen Gras.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 222fe8fb19SBen Gras.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 232fe8fb19SBen Gras.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 242fe8fb19SBen Gras.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 252fe8fb19SBen Gras.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 262fe8fb19SBen Gras.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 272fe8fb19SBen Gras.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 282fe8fb19SBen Gras.\" SUCH DAMAGE. 292fe8fb19SBen Gras.\" 302fe8fb19SBen Gras.\" @(#)byteorder.3 8.1 (Berkeley) 6/4/93 312fe8fb19SBen Gras.\" 32*f14fb602SLionel Sambuc.Dd May 3, 2011 332fe8fb19SBen Gras.Dt BYTEORDER 3 342fe8fb19SBen Gras.Os 352fe8fb19SBen Gras.Sh NAME 362fe8fb19SBen Gras.Nm htonl , 372fe8fb19SBen Gras.Nm htons , 382fe8fb19SBen Gras.Nm ntohl , 392fe8fb19SBen Gras.Nm ntohs 402fe8fb19SBen Gras.Nd convert values between host and network byte order 412fe8fb19SBen Gras.Sh LIBRARY 422fe8fb19SBen Gras.Lb libc 432fe8fb19SBen Gras.Sh SYNOPSIS 442fe8fb19SBen Gras.In arpa/inet.h 452fe8fb19SBen Gras.Ft uint32_t 462fe8fb19SBen Gras.Fn htonl "uint32_t host32" 472fe8fb19SBen Gras.Ft uint16_t 482fe8fb19SBen Gras.Fn htons "uint16_t host16" 492fe8fb19SBen Gras.Ft uint32_t 502fe8fb19SBen Gras.Fn ntohl "uint32_t net32" 512fe8fb19SBen Gras.Ft uint16_t 522fe8fb19SBen Gras.Fn ntohs "uint16_t net16" 532fe8fb19SBen Gras.Sh DESCRIPTION 542fe8fb19SBen GrasThese routines convert 16 and 32 bit quantities between network 552fe8fb19SBen Grasbyte order and host byte order. 562fe8fb19SBen Gras.Pp 572fe8fb19SBen GrasOn machines which have a byte order which is the same as the network 582fe8fb19SBen Grasorder, these routines are defined as macros that expand to the value of 592fe8fb19SBen Grastheir argument. 602fe8fb19SBen Gras.Pp 612fe8fb19SBen GrasThese routines are most often used in conjunction with Internet 622fe8fb19SBen Grasaddresses and ports as returned by 632fe8fb19SBen Gras.Xr gethostbyname 3 642fe8fb19SBen Grasand 652fe8fb19SBen Gras.Xr getservent 3 . 662fe8fb19SBen Gras.Sh SEE ALSO 67*f14fb602SLionel Sambuc.Xr bswap 3 , 682fe8fb19SBen Gras.Xr gethostbyname 3 , 692fe8fb19SBen Gras.Xr getservent 3 702fe8fb19SBen Gras.Sh STANDARDS 71*f14fb602SLionel SambucThe described functions conform to 722fe8fb19SBen Gras.St -p1003.1-2001 . 732fe8fb19SBen Gras.Sh HISTORY 742fe8fb19SBen GrasThe 752fe8fb19SBen Gras.Nm byteorder 762fe8fb19SBen Grasfunctions appeared in 772fe8fb19SBen Gras.Bx 4.2 . 782fe8fb19SBen Gras.Sh BUGS 792fe8fb19SBen GrasThe `l' and `s' suffixes in the names are not meaningful in machines 802fe8fb19SBen Graswhere long integers are not 32 bits. 81