<arpa/inet.h>(0P)                                   POSIX Programmer's Manual                                  <arpa/inet.h>(0P)



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 pro-
       totypes 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, Copy-
       right (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.open-
       group.org/unix/online.html .



IEEE/The Open Group                                           2003                                             <arpa/inet.h>(0P)