NAME
htonl, htons, ntohl, ntohs - convert values between host and network byte order
LIBRARY
Standard C library (libc, -lc)
SYNOPSIS
#include <arpa/inet.h>uint32_t htonl(uint32_t \nhostlong\n);\n
\nuint16_t htons(uint16_t \nhostshort\n);uint32_t ntohl(uint32_t \nnetlong\n);\n
\nuint16_t ntohs(uint16_t \nnetshort\n);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
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
| htonl (), htons (), ntohl (), ntohs () | Thread safety | MT-Safe |
STANDARDS
POSIX.1-2008.
HISTORY
POSIX.1-2001.
SEE ALSO
bswap(3), endian(3), gethostbyname(3), getservent(3)