htons() — Translate an unsigned short integer into network byte order

Standards

Standards / Extensions	C or C++	Dependencies
XPG4.2 Single UNIX Specification, Version 3	both

XPG4.2

#define _XOPEN_SOURCE_EXTENDED 1
#include <arpa/inet.h>

in_port_t htons(in_port_t hostshort);

SUSV3

#define _POSIX_C_SOURCE 200112L
#include <arpa/inet.h>

uint16_t htons(uint16_t hostshort);

Berkeley Sockets

#define _OE_SOCKETS
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>

unsigned short htons(unsigned short a);

The htons() function translates a short integer from host byte order to network byte order.

Parameter: Description
a: The unsigned short integer to be put into network byte order.
in_port_t hostshort: Is typed to the unsigned short integer to be put into network byte order.

Notes:

For MVS™, host byte order and network byte order are the same.
Since this function is implemented as a macro, you need one of the feature test macros and the inet header file.

htons() returns the translated short integer.