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Content-type: text/html
<HTML><HEAD><TITLE>Manpage of IPSEC_SUBNETOF</TITLE>
</HEAD><BODY>
<H1>IPSEC_SUBNETOF</H1>
Section: C Library Functions (3)<BR>Updated: 11 June 2001<BR><A HREF="#index">Index</A>
<A HREF="http://localhost/cgi-bin/man/man2html">Return to Main Contents</A><HR>
<A NAME="lbAB"> </A>
<H2>NAME</H2>
ipsec subnetof - given Internet address and subnet mask, return subnet number
<BR>
ipsec hostof - given Internet address and subnet mask, return host part
<BR>
ipsec broadcastof - given Internet address and subnet mask, return broadcast address
<A NAME="lbAC"> </A>
<H2>SYNOPSIS</H2>
<B>#include <<A HREF="file:/usr/include/freeswan.h">freeswan.h</A>></B>
<P>
<B>struct in_addr subnetof(struct in_addr addr,</B>
<BR>
<B>struct in_addr mask);</B>
<BR>
<B>struct in_addr hostof(struct in_addr addr,</B>
<BR>
<B>struct in_addr mask);</B>
<BR>
<B>struct in_addr broadcastof(struct in_addr addr,</B>
<BR>
<B>struct in_addr mask);</B>
<A NAME="lbAD"> </A>
<H2>DESCRIPTION</H2>
These functions are obsolete; see
<I><A HREF="ipsec_networkof.3.html">ipsec_networkof</A></I>(3)
for their replacements.
<P>
<I>Subnetof</I>
takes an Internet
<I>address</I>
and a subnet
<I>mask</I>
and returns the network part of the address
(all in network byte order).
<I>Hostof</I>
similarly returns the host part, and
<I>broadcastof</I>
returns the broadcast address (all-1s convention) for the network.
<P>
These functions are provided to hide the Internet bit-munging inside
an API, in hopes of easing the eventual transition to IPv6.
<A NAME="lbAE"> </A>
<H2>SEE ALSO</H2>
<A HREF="inet.3.html">inet</A>(3), <A HREF="ipsec_atosubnet.3.html">ipsec_atosubnet</A>(3)
<A NAME="lbAF"> </A>
<H2>HISTORY</H2>
Written for the FreeS/WAN project by Henry Spencer.
<A NAME="lbAG"> </A>
<H2>BUGS</H2>
Calling functions for this is more costly than doing it yourself.
<P>
<HR>
<A NAME="index"> </A><H2>Index</H2>
<DL>
<DT><A HREF="#lbAB">NAME</A><DD>
<DT><A HREF="#lbAC">SYNOPSIS</A><DD>
<DT><A HREF="#lbAD">DESCRIPTION</A><DD>
<DT><A HREF="#lbAE">SEE ALSO</A><DD>
<DT><A HREF="#lbAF">HISTORY</A><DD>
<DT><A HREF="#lbAG">BUGS</A><DD>
</DL>
<HR>
This document was created by
<A HREF="http://localhost/cgi-bin/man/man2html">man2html</A>,
using the manual pages.<BR>
Time: 21:40:17 GMT, November 11, 2003
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