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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  func-
       tions 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 orig-
       inal 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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