1 Content-type: text/html
3 <HTML><HEAD><TITLE>Manpage of IPSEC_GOODMASK</TITLE>
5 <H1>IPSEC_GOODMASK</H1>
6 Section: C Library Functions (3)<BR>Updated: 11 June 2001<BR><A HREF="#index">Index</A>
7 <A HREF="http://localhost/cgi-bin/man/man2html">Return to Main Contents</A><HR>
10 <A NAME="lbAB"> </A>
13 ipsec goodmask - is this Internet subnet mask a valid one?
16 ipsec masktobits - convert Internet subnet mask to bit count
19 ipsec bitstomask - convert bit count to Internet subnet mask
20 <A NAME="lbAC"> </A>
23 <B>#include <<A HREF="file:/usr/include/freeswan.h">freeswan.h</A>></B>
26 <B>int goodmask(struct in_addr mask);</B>
30 <B>int masktobits(struct in_addr mask);</B>
34 <B>struct in_addr bitstomask(int n);</B>
36 <A NAME="lbAD"> </A>
39 These functions are obsolete;
41 <I><A HREF="ipsec_masktocount.3.html">ipsec_masktocount</A></I>(3)
43 for a partial replacement.
48 reports whether the subnet
52 i.e. consists of a (possibly empty) sequence of
55 followed by a (possibly empty) sequence of
60 takes a (valid) subnet mask and returns the number of
67 returning the subnet mask corresponding to bit count
72 All masks are in network byte order.
73 <A NAME="lbAE"> </A>
76 <A HREF="inet.3.html">inet</A>(3), <A HREF="ipsec_atosubnet.3.html">ipsec_atosubnet</A>(3)
77 <A NAME="lbAF"> </A>
88 returns an all-zeros mask for a negative or out-of-range
91 <A NAME="lbAG"> </A>
94 Written for the FreeS/WAN project by Henry Spencer.
95 <A NAME="lbAH"> </A>
98 The error-reporting convention of
102 zero is sometimes a legitimate mask.
106 <A NAME="index"> </A><H2>Index</H2>
108 <DT><A HREF="#lbAB">NAME</A><DD>
109 <DT><A HREF="#lbAC">SYNOPSIS</A><DD>
110 <DT><A HREF="#lbAD">DESCRIPTION</A><DD>
111 <DT><A HREF="#lbAE">SEE ALSO</A><DD>
112 <DT><A HREF="#lbAF">DIAGNOSTICS</A><DD>
113 <DT><A HREF="#lbAG">HISTORY</A><DD>
114 <DT><A HREF="#lbAH">BUGS</A><DD>
117 This document was created by
118 <A HREF="http://localhost/cgi-bin/man/man2html">man2html</A>,
119 using the manual pages.<BR>
120 Time: 05:09:31 GMT, June 19, 2001