TUT:mib2c config files

From Net-SNMP Wiki

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 a html summary of the ifTable branch of the mib tree. It's probably much more readable than the average MIB file to many people.

[edit]

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.

[edit]