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Linux 2.6 - man page for htons (linux section 3posix)

HTONL(P)			    POSIX Programmer's Manual				 HTONL(P)

NAME
       htonl, htons, ntohl, ntohs - convert values between host and network byte order

SYNOPSIS
       #include <arpa/inet.h>

       uint32_t htonl(uint32_t hostlong);
       uint16_t htons(uint16_t hostshort);
       uint32_t ntohl(uint32_t netlong);
       uint16_t ntohs(uint16_t netshort);

DESCRIPTION
       These  functions shall convert 16-bit and 32-bit quantities between network byte order and
       host byte order.

       On some implementations, these functions are defined as macros.

       The uint32_t and uint16_t types are defined in <inttypes.h>.

RETURN VALUE
       The htonl() and htons() functions shall return the argument value converted from  host  to
       network byte order.

       The  ntohl()  and ntohs() functions shall return the argument value converted from network
       to host byte order.

ERRORS
       No errors are defined.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       These functions are most often used in  conjunction  with  IPv4	addresses  and	ports  as
       returned by gethostent() and getservent().

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       endhostent()  ,	endservent() , the Base Definitions volume of IEEE Std 1003.1-2001, <int-
       types.h>, <arpa/inet.h>

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					 HTONL(P)


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