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><A
NAME="NET-SNMP-MIB-COMPILER">MIB Compiler</H1
><P
>In the directory
<TT
CLASS="FILENAME"
>/snmp/agent/VERSION/utils/mib2c</TT
>,
there are the following files:</P
><TABLE
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><TD
><PRE
CLASS="PROGRAMLISTING"
>README-eCos notes about running with a nonstandard
perl path.
README.mib2c the README from UCD; full instructions on
using mib2c
mib2c the perl program
mib2c.conf a configuration file altered to include the
eCos/UCD
mib2c.conf-ORIG copyright and better #include paths; and
the ORIGinal.
mib2c.storage.conf other config files, not modified.
mib2c.vartypes.conf</PRE
></TD
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></TABLE
><P
>mib2c is provided BUT it requires the SNMP perl package SNMP-3.1.0,
and that in turn requires perl nsPerl5.005_03 (part of
Red Hat Linux from 6.0, April 1999).</P
><P
>These are available from the CPAN (“the Comprehensive
Perl Archive Network”) as usual;
<A
HREF="http://www.cpan.org/"
TARGET="_top"
>http://www.cpan.org/</A
>
and links from there. Specifically:</P
><P
></P
><UL
><LI
><P
>PERL itself:
<A
HREF="http://people.netscape.com/kristian/nsPerl/"
TARGET="_top"
>http://people.netscape.com/kristian/nsPerl/</A
></P
></LI
><LI
><P
><A
HREF="http://people.netscape.com/richm/nsPerl/nsPerl5.005_03-11-i686-linux.tar.gz"
TARGET="_top"
>http://people.netscape.com/richm/nsPerl/nsPerl5.005_03-11-i686-linux.tar.gz</A
></P
></LI
><LI
><P
>SNMP.pl
<A
HREF="http://www.cpan.org/modules/01modules.index.html"
TARGET="_top"
>http://www.cpan.org/modules/01modules.index.html</A
></P
></LI
><LI
><P
><A
HREF="http://cpan.valueclick.com/modules/by-category/05_Networking_Devices_IPC/SNMP/"
TARGET="_top"
>http://cpan.valueclick.com/modules/by-category/05_Networking_Devices_IPC/SNMP/</A
></P
></LI
><LI
><P
><A
HREF="http://www.cpan.org/authors/id/G/GS/GSM/SNMP.tar.gz"
TARGET="_top"
>http://www.cpan.org/authors/id/G/GS/GSM/SNMP.tar.gz</A
></P
></LI
></UL
><P
>(note that the .tar.gz files are not browsable)</P
><P
>For documentation on the files produced, see the documentation
available at
<A
HREF="http://ucd-snmp.ucdavis.edu/"
TARGET="_top"
>http://ucd-snmp.ucdavis.edu/</A
>
in general, and file <TT
CLASS="FILENAME"
>AGENT.txt</TT
> in particular.</P
><P
>It is likely that the output of mib2c will be further customized
depending on eCos customer needs; it’s easy to do this
by editing the mib2c.conf file to add or remove whatever you need
with the resulting C sources.</P
><P
>The UCD autoconf-style configuration does not apply to eCos.
So if you add a completely new MIB to the agent, and support it
using mib2c so that the my_new_mib.c file contains
a init_my_new_mib() routine to register
the MIB handler, you will also need to edit a couple of control
files; these claim to be auto-generated, but in the eCos release,
they’re not, don’t worry.</P
><TABLE
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><PRE
CLASS="PROGRAMLISTING"
>PACKAGES/net/snmp/agent/VERSION/include/mib_module_includes.h</PRE
></TD
></TR
></TABLE
><P
>contains a number of lines like</P
><TABLE
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><TD
><PRE
CLASS="PROGRAMLISTING"
>#include “mibgroup/mibII/interfaces.h”</PRE
></TD
></TR
></TABLE
><P
>so add your new MIB thus:</P
><TABLE
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><TD
><PRE
CLASS="PROGRAMLISTING"
>#include “mibgroup/mibII/my_new_mib.h”</PRE
></TD
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><PRE
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>PACKAGES/net/snmp/agent/VERSION/include/mib_module_inits.h </PRE
></TD
></TR
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><P
>contains a number of lines like</P
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><TD
><PRE
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>init_interfaces();
init_dot3(); </PRE
></TD
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><P
>and so on; add your new MIB as follows:</P
><TABLE
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><TD
><PRE
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>init_my_new_mib(); </PRE
></TD
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><P
>and this should work correctly.</P
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