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Content-type: text/html
<HTML><HEAD><TITLE>Manpage of IPSEC_PORTOF</TITLE>
</HEAD><BODY>
<H1>IPSEC_PORTOF</H1>
Section: C Library Functions (3)<BR>Updated: 8 Sept 2000<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 portof - get port field of an ip_address
<BR>
ipsec setportof - set port field of an ip_address
<BR>
ipsec sockaddrof - get pointer to internal sockaddr of an ip_address
<BR>
ipsec sockaddrlenof - get length of internal sockaddr of an ip_address
<A NAME="lbAC"> </A>
<H2>SYNOPSIS</H2>
<B>#include <<A HREF="file:/usr/include/freeswan.h">freeswan.h</A>></B>
<P>
<B>int portof(const ip_address *src);</B>
<BR>
<B>void setportof(int port, ip_address *dst);</B>
<BR>
<B>struct sockaddr *sockaddrof(ip_address *src);</B>
<BR>
<B>size_t sockaddrlenof(const ip_address *src);</B>
<A NAME="lbAD"> </A>
<H2>DESCRIPTION</H2>
The
<B><<A HREF="file:/usr/include/freeswan.h">freeswan.h</A>></B>
internal type
<I>ip_address</I>
contains one of the
<I>sockaddr</I>
types internally.
<I>Reliance on this feature is discouraged</I>,
but it may occasionally be necessary.
These functions provide low-level tools for this purpose.
<P>
<I>Portof</I>
and
<I>setportof</I>
respectively read and write the port-number field of the internal
<I>sockaddr</I>.
The values are in network byte order.
<P>
<I>Sockaddrof</I>
returns a pointer to the internal
<I>sockaddr</I>,
for passing to other functions.
<P>
<I>Sockaddrlenof</I>
reports the size of the internal
<I>sockaddr</I>,
for use in storage allocation.
<A NAME="lbAE"> </A>
<H2>SEE ALSO</H2>
<A HREF="inet.3.html">inet</A>(3), <A HREF="ipsec_initaddr.3.html">ipsec_initaddr</A>(3)
<A NAME="lbAF"> </A>
<H2>DIAGNOSTICS</H2>
<I>Portof</I>
returns
<B>-1</B>,
<I>sockaddrof</I>
returns
<B>NULL</B>,
and
<I>sockaddrlenof</I>
returns
<B>0</B>
if an unknown address family is found within the
<I>ip_address</I>.
<A NAME="lbAG"> </A>
<H2>HISTORY</H2>
Written for the FreeS/WAN project by Henry Spencer.
<A NAME="lbAH"> </A>
<H2>BUGS</H2>
These functions all depend on low-level details of the
<I>ip_address</I>
type, which are in principle subject to change.
Avoid using them unless really necessary.
<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">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: 21:40:18 GMT, November 11, 2003
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