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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.

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