NAME¶
htonl, htons, ntohl, ntohs - convert values between host and network byte order
SYNOPSIS¶
#include <arpa/inet.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¶
The
htonl() function converts the unsigned integer
hostlong from
host byte order to network byte order.
The
htons() function converts the unsigned short integer
hostshort
from host byte order to network byte order.
The
ntohl() function converts the unsigned integer
netlong from
network byte order to host byte order.
The
ntohs() function converts the unsigned short integer
netshort
from network byte order to host byte order.
On the i386 the host byte order is Least Significant Byte first, whereas the
network byte order, as used on the Internet, is Most Significant Byte first.
ATTRIBUTES¶
Multithreading (see pthreads(7))¶
The
htonl(),
htons(),
ntohl(), and
ntohs() functions
are thread-safe.
POSIX.1-2001.
Some systems require the inclusion of
<netinet/in.h> instead of
<arpa/inet.h>.
SEE ALSO¶
endian(3),
gethostbyname(3),
getservent(3)
COLOPHON¶
This page is part of release 3.74 of the Linux
man-pages project. A
description of the project, information about reporting bugs, and the latest
version of this page, can be found at
http://www.kernel.org/doc/man-pages/.
