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



PPRROOLLOOGG
       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.

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

SSYYNNOOPPSSIISS
       #include <arpa/inet.h>

DDEESSCCRRIIPPTTIIOONN
       The _<_a_r_p_a_/_i_n_e_t_._h_> header shall define the iinn__ppoorrtt__tt and iinn__aaddddrr__tt types
       as described in _<_n_e_t_i_n_e_t_/_i_n_._h_>.

       The _<_a_r_p_a_/_i_n_e_t_._h_> header shall define the iinn__aaddddrr structure as
       described in _<_n_e_t_i_n_e_t_/_i_n_._h_>.

       The _<_a_r_p_a_/_i_n_e_t_._h_> header shall define the INET_ADDRSTRLEN and
       INET6_ADDRSTRLEN macros as described in _<_n_e_t_i_n_e_t_/_i_n_._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 _<_a_r_p_a_/_i_n_e_t_._h_> header shall define the uuiinntt3322__tt and uuiinntt1166__tt types
       as described in _<_i_n_t_t_y_p_e_s_._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 _<_a_r_p_a_/_i_n_e_t_._h_> header may also make visible all symbols
       from _<_n_e_t_i_n_e_t_/_i_n_._h_> and _<_i_n_t_t_y_p_e_s_._h_>.

       _T_h_e _f_o_l_l_o_w_i_n_g _s_e_c_t_i_o_n_s _a_r_e _i_n_f_o_r_m_a_t_i_v_e_.

AAPPPPLLIICCAATTIIOONN UUSSAAGGEE
       None.

RRAATTIIOONNAALLEE
       None.

FFUUTTUURREE DDIIRREECCTTIIOONNSS
       None.

SSEEEE AALLSSOO
       <<iinnttttyyppeess..hh>>, <<nneettiinneett__iinn..hh>>

       The System Interfaces volume of POSIX.1-2017, _h_t_o_n_l(), _i_n_e_t___a_d_d_r(),
       _i_n_e_t___n_t_o_p()

CCOOPPYYRRIIGGHHTT
       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                       arpa_inet.h(3)
