1arpa_inet.h(0P)            POSIX Programmer's Manual           arpa_inet.h(0P)
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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.
10

NAME

12       arpa/inet.h — definitions for internet operations
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SYNOPSIS

15       #include <arpa/inet.h>
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DESCRIPTION

18       The <arpa/inet.h> header shall define the in_port_t and in_addr_t types
19       as described in <netinet/in.h>.
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21       The   <arpa/inet.h>  header  shall  define  the  in_addr  structure  as
22       described in <netinet/in.h>.
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24       The  <arpa/inet.h>  header  shall  define   the   INET_ADDRSTRLEN   and
25       INET6_ADDRSTRLEN macros as described in <netinet/in.h>.
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27       The  following shall be declared as functions, or defined as macros, or
28       both. If functions are declared, function prototypes shall be provided.
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31           uint32_t htonl(uint32_t);
32           uint16_t htons(uint16_t);
33           uint32_t ntohl(uint32_t);
34           uint16_t ntohs(uint16_t);
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36       The <arpa/inet.h> header shall define the uint32_t and  uint16_t  types
37       as described in <inttypes.h>.
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39       The following shall be declared as functions and may also be defined as
40       macros. Function prototypes shall be provided.
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43           in_addr_t    inet_addr(const char *);
44           char        *inet_ntoa(struct in_addr);
45           const char  *inet_ntop(int, const void *restrict, char *restrict,
46                            socklen_t);
47           int          inet_pton(int, const char *restrict, void *restrict);
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49       Inclusion of the <arpa/inet.h> header may also make visible all symbols
50       from <netinet/in.h> and <inttypes.h>.
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52       The following sections are informative.
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APPLICATION USAGE

55       None.
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RATIONALE

58       None.
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FUTURE DIRECTIONS

61       None.
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SEE ALSO

64       <inttypes.h>, <netinet_in.h>
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66       The  System  Interfaces  volume  of POSIX.1‐2017, htonl(), inet_addr(),
67       inet_ntop()
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70       Portions of this text are reprinted and reproduced in  electronic  form
71       from  IEEE Std 1003.1-2017, Standard for Information Technology -- Por‐
72       table Operating System Interface (POSIX), The Open Group Base  Specifi‐
73       cations  Issue  7, 2018 Edition, Copyright (C) 2018 by the Institute of
74       Electrical and Electronics Engineers, Inc and The Open Group.   In  the
75       event of any discrepancy between this version and the original IEEE and
76       The Open Group Standard, the original IEEE and The Open Group  Standard
77       is  the  referee document. The original Standard can be obtained online
78       at http://www.opengroup.org/unix/online.html .
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80       Any typographical or formatting errors that appear  in  this  page  are
81       most likely to have been introduced during the conversion of the source
82       files to man page format. To report such errors,  see  https://www.ker‐
83       nel.org/doc/man-pages/reporting_bugs.html .
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87IEEE/The Open Group                  2017                      arpa_inet.h(0P)
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