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 .