Mib compiler – Comtrol eCos User Manual

Page 621

Chapter 47. SNMP for eCos

tation. As required, a cleaner interface to permit application code to manage persistent data will be developed in
consultation with customers.

MIB Compiler

In the directory

/snmp/agent/VERSION/utils/mib2c

, there are the following files:

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

the ORIGinal.

mib2c.storage.conf

other config files, not modified.

mib2c.vartypes.conf

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).

These are available from the CPAN (“the Comprehensive Perl Archive Network”) as usual; http://www.cpan.org/
and links from there. Specifically:

•

PERL itself: http://people.netscape.com/kristian/nsPerl/

•

http://people.netscape.com/richm/nsPerl/nsPerl5.005_03-11-i686-linux.tar.gz

•

SNMP.pl http://www.cpan.org/modules/01modules.index.html

•

http://cpan.valueclick.com/modules/by-category/05_Networking_Devices_IPC/SNMP/

•

http://www.cpan.org/authors/id/G/GS/GSM/SNMP.tar.gz

(note that the .tar.gz files are not browsable)

For documentation on the files produced, see the documentation available at http://ucd-snmp.ucdavis.edu/ in gen-
eral, and file

AGENT.txt

in particular.

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.

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.

PACKAGES/net/snmp/agent/VERSION/include/mib_module_includes.h

contains a number of lines like

#include “mibgroup/mibII/interfaces.h”

so add your new MIB thus:

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