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NAME

       arpa/inet.h - definitions for internet operations

SYNOPSIS

       #include <arpa/inet.h>

DESCRIPTION

       The  in_port_t  and  in_addr_t  types  shall be defined as described in
       <netinet/in.h> .

       The in_addr structure shall be defined as described in <netinet/in.h> .

       The INET_ADDRSTRLEN    and INET6_ADDRSTRLEN  macros shall be defined as
       described in <netinet/in.h> .

       The following shall either be declared as functions, 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 uint32_t and uint16_t  types  shall  be  defined  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

       <netinet/in.h>  ,  <inttypes.h>  ,  the  System  Interfaces  volume  of
       IEEE Std 1003.1-2001, htonl(), inet_addr()

COPYRIGHT

       Portions of this text are reprinted and reproduced in  electronic  form
       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
       -- Portable Operating System Interface (POSIX),  The  Open  Group  Base
       Specifications  Issue  6,  Copyright  (C) 2001-2003 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 .