- import of strongswan-2.7.0

- applied patch for charon
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+<HTML><HEAD><TITLE>Manpage of IPSEC_GOODMASK</TITLE>
+</HEAD><BODY>
+<H1>IPSEC_GOODMASK</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">&nbsp;</A>
+<H2>NAME</H2>
+
+ipsec goodmask - is this Internet subnet mask a valid one?
+<BR>
+
+ipsec masktobits - convert Internet subnet mask to bit count
+<BR>
+
+ipsec bitstomask - convert bit count to Internet subnet mask
+<A NAME="lbAC">&nbsp;</A>
+<H2>SYNOPSIS</H2>
+
+<B>#include &lt;<A HREF="file:/usr/include/freeswan.h">freeswan.h</A>&gt;</B>
+
+<P>
+<B>int goodmask(struct in_addr mask);</B>
+
+<BR>
+
+<B>int masktobits(struct in_addr mask);</B>
+
+<BR>
+
+<B>struct in_addr bitstomask(int n);</B>
+
+<A NAME="lbAD">&nbsp;</A>
+<H2>DESCRIPTION</H2>
+
+These functions are obsolete;
+see
+<I><A HREF="ipsec_masktocount.3.html">ipsec_masktocount</A></I>(3)
+
+for a partial replacement.
+<P>
+
+<I>Goodmask</I>
+
+reports whether the subnet
+<I>mask</I>
+
+is a valid one,
+i.e. consists of a (possibly empty) sequence of
+<B>1</B>s
+
+followed by a (possibly empty) sequence of
+<B>0</B>s.
+
+<I>Masktobits</I>
+
+takes a (valid) subnet mask and returns the number of
+<B>1</B>
+
+bits in it.
+<I>Bitstomask</I>
+
+reverses this,
+returning the subnet mask corresponding to bit count
+<I>n</I>.
+
+<P>
+
+All masks are in network byte order.
+<A NAME="lbAE">&nbsp;</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">&nbsp;</A>
+<H2>DIAGNOSTICS</H2>
+
+<I>Masktobits</I>
+
+returns
+<B>-1</B>
+
+for an invalid mask.
+<I>Bitstomask</I>
+
+returns an all-zeros mask for a negative or out-of-range
+<I>n</I>.
+
+<A NAME="lbAG">&nbsp;</A>
+<H2>HISTORY</H2>
+
+Written for the FreeS/WAN project by Henry Spencer.
+<A NAME="lbAH">&nbsp;</A>
+<H2>BUGS</H2>
+
+The error-reporting convention of
+<I>bitstomask</I>
+
+is less than ideal;
+zero is sometimes a legitimate mask.
+<P>
+
+<HR>
+<A NAME="index">&nbsp;</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">DIAGNOSTICS</A><DD>
+<DT><A HREF="#lbAG">HISTORY</A><DD>
+<DT><A HREF="#lbAH">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
+</BODY>
+</HTML>