This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface

       These functions are most often used  in  conjunction  with  IPv4  addresses  and  ports  as  returned  by
       gethostent() and getservent().

       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 .

IEEE/The Open Group                                   2017                                         HTONL(3POSIX)

       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>.

       No errors are defined.

       Thefollowingsectionsareinformative.

       None.

       None.

       htonl, htons, ntohl, ntohs — convert values between host and network byte order

       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.

       None.

       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.

endhostent(), endservent()

       The Base Definitions volume of POSIX.1‐2017, <arpa_inet.h>, <inttypes.h>

       #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);