1HTONL(3P)                  POSIX Programmer's Manual                 HTONL(3P)
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PROLOG

6       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
7       implementation of this interface may differ (consult the  corresponding
8       Linux  manual page for details of Linux behavior), or the interface may
9       not be implemented on Linux.
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NAME

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

16       #include <arpa/inet.h>
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18       uint32_t htonl(uint32_t hostlong);
19       uint16_t htons(uint16_t hostshort);
20       uint32_t ntohl(uint32_t netlong);
21       uint16_t ntohs(uint16_t netshort);
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DESCRIPTION

24       These functions shall convert 16-bit and 32-bit quantities between net‐
25       work byte order and host byte order.
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27       On some implementations, these functions are defined as macros.
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29       The uint32_t and uint16_t types are defined in <inttypes.h>.
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RETURN VALUE

32       The htonl() and htons() functions shall return the argument value  con‐
33       verted from host to network byte order.
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35       The  ntohl() and ntohs() functions shall return the argument value con‐
36       verted from network to host byte order.
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ERRORS

39       No errors are defined.
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41       The following sections are informative.
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EXAMPLES

44       None.
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APPLICATION USAGE

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

51       None.
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FUTURE DIRECTIONS

54       None.
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SEE ALSO

57       endhostent(), endservent()
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59       The  Base  Definitions  volume  of  POSIX.1‐2017,  <arpa_inet.h>, <int‐
60       types.h>
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63       Portions of this text are reprinted and reproduced in  electronic  form
64       from  IEEE Std 1003.1-2017, Standard for Information Technology -- Por‐
65       table Operating System Interface (POSIX), The Open Group Base  Specifi‐
66       cations  Issue  7, 2018 Edition, Copyright (C) 2018 by the Institute of
67       Electrical and Electronics Engineers, Inc and The Open Group.   In  the
68       event of any discrepancy between this version and the original IEEE and
69       The Open Group Standard, the original IEEE and The Open Group  Standard
70       is  the  referee document. The original Standard can be obtained online
71       at http://www.opengroup.org/unix/online.html .
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73       Any typographical or formatting errors that appear  in  this  page  are
74       most likely to have been introduced during the conversion of the source
75       files to man page format. To report such errors,  see  https://www.ker‐
76       nel.org/doc/man-pages/reporting_bugs.html .
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80IEEE/The Open Group                  2017                            HTONL(3P)
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