htonl3p
Convert values between host and network byte order
Usage
#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);
Prolog
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.
Overview
These functions shall convert 16-bit and 32-bit quantities between network byte order and host byte order.
On some implementations, these functions are defined as macros.
The uint32_t and uint16_t types are defined in <inttypes.h>.
Return value
The htonl() and htons() functions shall return the argument value converted from host to network byte order.
The ntohl() and ntohs() functions shall return the argument value converted from network to host byte order.
Errors
No errors are defined.
The following sections are informative.
Examples
None.
Application usage
These functions are most often used in conjunction with IPv4 addresses and ports as returned by gethostent() and getservent().
Rationale
None.
Future directions
None.