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NAME | SYNOPSIS | DESCRIPTION | ATTRIBUTES | CONFORMING TO | SEE ALSO | COLOPHON |
BYTEORDER(3) Linux Programmer's Manual BYTEORDER(3)
htonl, htons, ntohl, ntohs - convert values between host and network
byte order
#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);
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.
For an explanation of the terms used in this section, see
attributes(7).
┌───────────────────────────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├───────────────────────────────────┼───────────────┼─────────┤
│htonl(), htons(), ntohl(), ntohs() │ Thread safety │ MT-Safe │
└───────────────────────────────────┴───────────────┴─────────┘
POSIX.1-2001, POSIX.1-2008.
Some systems require the inclusion of <netinet/in.h> instead of
<arpa/inet.h>.
bswap(3), endian(3), gethostbyname(3), getservent(3)
This page is part of release 4.12 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
https://www.kernel.org/doc/man-pages/.
GNU 2016-10-08 BYTEORDER(3)
Pages that refer to this page: bswap(3), endian(3), inet(3), pmdacache(3), ip(7), signal-safety(7)