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TUT:mib2c_config_files

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Bill Fenner edited this page Aug 30, 2018 · 1 revision

mib2c is actually very poorly named. It was originally designed as a mechanism for producing C-code from a MIB file. However, it really is just a template system. You can produce just about anything from a MIB if you can write a template about how you want the output to be. For example:

 mib2c -c mib2c.genhtml.conf ifTable

The above command writes an html summary of the ifTable branch of the mib tree. It's probably much more readable than the average MIB file to many people.

Writing your own .conf file

The mib2c configuration file language is fairly easy to understand. See the mib2c configuration file manual page for details.

A quick preview: If you have a file that looks like this:

 @open -@  @foreach $t table@    In table $t we have the following indexes:    @foreach $i index@      $i        (at $i.subid) which is of type $i.type    @end@    And the following columns:    @foreach $i nonindex@      $i        (at $i.subid) which is of type $i.type    @end@  @end@

and we run mib2c pointing to that file we get:

 > mib2c`` ``-c`` ``MYFILE.conf`` ``ifTable  writing to -    In table ifTable we have the following indexes:      ifIndex        (at 1) which is of type ASN_INTEGER    And the following columns:      ifDescr        (at 2) which is of type ASN_OCTET_STR      ifType        (at 3) which is of type ASN_INTEGER      ifMtu        (at 4) which is of type ASN_INTEGER      ifSpeed        (at 5) which is of type ASN_GAUGE      ifPhysAddress        (at 6) which is of type ASN_OCTET_STR      ifAdminStatus        (at 7) which is of type ASN_INTEGER      ifOperStatus        (at 8) which is of type ASN_INTEGER      ifLastChange        (at 9) which is of type ASN_TIMETICKS      ifInOctets        (at 10) which is of type ASN_COUNTER      ifInUcastPkts        (at 11) which is of type ASN_COUNTER      ifInNUcastPkts        (at 12) which is of type ASN_COUNTER      ifInDiscards        (at 13) which is of type ASN_COUNTER      ifInErrors        (at 14) which is of type ASN_COUNTER      ifInUnknownProtos        (at 15) which is of type ASN_COUNTER      ifOutOctets        (at 16) which is of type ASN_COUNTER      ifOutUcastPkts        (at 17) which is of type ASN_COUNTER      ifOutNUcastPkts        (at 18) which is of type ASN_COUNTER      ifOutDiscards        (at 19) which is of type ASN_COUNTER      ifOutErrors        (at 20) which is of type ASN_COUNTER      ifOutQLen        (at 21) which is of type ASN_GAUGE      ifSpecific        (at 22) which is of type ASN_OBJECT_ID

As you can see, we can change a MIB into just about anything.

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