HTONL(3POSIX)

📦 version 2017a, in debian bookworm, debian trixie, ubuntu jammy, ubuntu noble, ubuntu resolute, ubuntu stonking

💖 HTONL(3POSIX) — the POSIX Programmer's Manual, bestie edition ✨

okay so first things first, this page lives in the POSIX Programmer's Manual, k? But heads up — the Linux implementation of this interface may differ, so pls consult the corresponding Linux manual page for the deets on Linux behavior. or like... the interface might not even be implemented on Linux at all. vibe check accordingly 🙈

🌸 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.

✨ 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 💅

so these four functions shall convert 16-bit and 32-bit quantities between network byte order and host byte order. that's it, that's the whole job. iconic behavior honestly 👑

on some implementations, these functions are defined as macros. (iykyk — that changes how you can use them, so don't come for me if your setup does this.)

the uint32_t and uint16_t types are defined in <inttypes.h>. periodt. 💜

🔥 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.

that's the whole glow-up. in, converted, out. 💖

💀 ERRORS 💀

No errors are defined. not a single one. she's flawless, she's unbothered, she doesn't do errors. 😭✨

The following sections are informative.

🌈 EXAMPLES 🌈

None. (yeah. nothing. we're all just out here reading the DESCRIPTION and figuring it out ourselves. lowkey relatable 🫶)

🧚 APPLICATION USAGE 🧚

These functions are most often used in conjunction with IPv4 addresses and ports as returned by gethostent() and getservent(). like that's their main character moment, fr fr.

⭐ RATIONALE ⭐

None.

🍓 FUTURE DIRECTIONS 🍓

None.

👑 SEE ALSO 👑

  • endhostent()
  • endservent()
  • The Base Definitions volume of POSIX.1‐2017, <arpa_inet.h>, <inttypes.h>

Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, 2018 Edition, Copyright (C) 2018 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .

Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .

okay that's the whole page bestie, hope you ate 💖 this absolute banger was brought to you by IEEE/The Open Group, dated 2017, filed under HTONL(3POSIX). go convert some bytes, you got this. 🎀✨💅

📦 where this page comes from