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

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  pro‐
       vided.

	      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 <int‐
       types.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 .

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