arpa_inet.h(3)             POSIX Programmer's Manual            arpa_inet.h(3)



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


NAME
       arpa/inet.h -- definitions for internet operations

SYNOPSIS
       #include <arpa/inet.h>

DESCRIPTION
       The <arpa/inet.h> header shall define the in_port_t and in_addr_t types
       as described in <netinet/in.h>.

       The <arpa/inet.h> header shall define the in_addr structure as
       described in <netinet/in.h>.

       The <arpa/inet.h> header shall define the INET_ADDRSTRLEN and
       INET6_ADDRSTRLEN macros as described in <netinet/in.h>.

       The following shall be declared as functions, or defined as macros, or
       both. If functions are declared, function prototypes shall be provided.

           uint32_t htonl(uint32_t);
           uint16_t htons(uint16_t);
           uint32_t ntohl(uint32_t);
           uint16_t ntohs(uint16_t);

       The <arpa/inet.h> header shall define the uint32_t and uint16_t types
       as described in <inttypes.h>.

       The following shall be declared as functions and may also be defined as
       macros. Function prototypes shall be provided.

           in_addr_t    inet_addr(const char **));;
           char        *inet_ntoa(struct in_addr);
           const char  *inet_ntop(int, const void *restrict, char *restrict,
                            socklen_t);
           int          inet_pton(int, const char *restrict, void *restrict);

       Inclusion of the <arpa/inet.h> header may also make visible all symbols
       from <netinet/in.h> and <inttypes.h>.

       The following sections are informative.

APPLICATION USAGE
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       <inttypes.h>, <netinet_in.h>

       The System Interfaces volume of POSIX.1-2008, htonl(), inet__addr(),
       inet__ntop()

COPYRIGHT
       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
       -- Portable Operating System Interface (POSIX), The Open Group Base
       Specifications Issue 7, Copyright (C) 2013 by the Institute of
       Electrical and Electronics Engineers, Inc and The Open Group.  (This is
       POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) 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.unix.org/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                  2013                       arpa_inet.h(3)
