usr/src/lib/libc/net/byteorder.3

.\" Copyright (c) 1983 Regents of the University of California.
.\" All rights reserved.  The Berkeley software License Agreement
.\" specifies the terms and conditions for redistribution.
.\"
.\"	@(#)byteorder.3	6.2 (Berkeley) %G%
.\"
.TH BYTEORDER 3N ""
.UC 5
.SH NAME
htonl, htons, ntohl, ntohs \- convert values between host and network byte order
.SH SYNOPSIS
.nf
.B #include <sys/types.h>
.B #include <netinet/in.h>
.PP
.B netlong = htonl(hostlong);
.B u_long netlong, hostlong;
.PP
.B netshort = htons(hostshort);
.B u_short netshort, hostshort;
.PP
.B hostlong = ntohl(netlong);
.B u_long hostlong, netlong;
.PP
.B hostshort = ntohs(netshort);
.B u_short hostshort, netshort;
.fi
.SH DESCRIPTION
These routines convert 16 and 32 bit quantities between network
byte order and host byte order.  On machines such as the SUN
these routines are defined as null macros in the include file
.RI < netinet/in.h >.
.PP
These routines are most often used in conjunction with Internet
addresses and ports as returned by
.IR gethostbyname (3N)
and
.IR getservent (3N).
.SH "SEE ALSO"
gethostbyname(3N),
getservent(3N)
.SH BUGS
The VAX handles bytes backwards from most everyone else in
the world.  This is not expected to be fixed in the near future.
Commit	Line	Data
	1	.\" Copyright (c) 1983 Regents of the University of California.
	2	.\" All rights reserved. The Berkeley software License Agreement
	3	.\" specifies the terms and conditions for redistribution.
	4	.\"
	5	.\" @(#)byteorder.3 6.2 (Berkeley) %G%
	6	.\"
	7	.TH BYTEORDER 3N ""
	8	.UC 5
	9	.SH NAME
	10	htonl, htons, ntohl, ntohs \- convert values between host and network byte order
	11	.SH SYNOPSIS
	12	.nf
	13	.B #include <sys/types.h>
	14	.B #include <netinet/in.h>
	15	.PP
	16	.B netlong = htonl(hostlong);
	17	.B u_long netlong, hostlong;
	18	.PP
	19	.B netshort = htons(hostshort);
	20	.B u_short netshort, hostshort;
	21	.PP
	22	.B hostlong = ntohl(netlong);
	23	.B u_long hostlong, netlong;
	24	.PP
	25	.B hostshort = ntohs(netshort);
	26	.B u_short hostshort, netshort;
	27	.fi
	28	.SH DESCRIPTION
	29	These routines convert 16 and 32 bit quantities between network
	30	byte order and host byte order. On machines such as the SUN
	31	these routines are defined as null macros in the include file
	32	.RI < netinet/in.h >.
	33	.PP
	34	These routines are most often used in conjunction with Internet
	35	addresses and ports as returned by
	36	.IR gethostbyname (3N)
	37	and
	38	.IR getservent (3N).
	39	.SH "SEE ALSO"
	40	gethostbyname(3N),
	41	getservent(3N)
	42	.SH BUGS
	43	The VAX handles bytes backwards from most everyone else in
	44	the world. This is not expected to be fixed in the near future.