> One more thing, is there a way to make net-snmp read my MIB module and
> then use the library to find out what are de DEFAULT values and
> allowable range of the INTEGER scalars defined in the MIB module
Not at run-time - no.
(Well, it's obviously possible, but I don't have the code to do it)
> (so I don't have to hardcode the allowable range of values and the
> DEFAULT value in my application)?
Given that the default value and range are fixed with the definition
of the MIB, hardcoding these values is the most obvious way to go.
I can't recall if the 'mib2c' template includes this or not - but it's
an obvious thing for it to handle.
> Also, what would you suggest to use for DisplayString variables
netsnmp_register_watched_scalar()
:-)
That's the other main difference betweeen this helper, and the
integer_interface family. They just implement integer-syntax objects,
while the watched scalar helper covers *any* scalar object.
Just define the watcher structure using the appropriate ASN_xxx
value for the object you're implementing.
The one potential stumbling block is with variable-length writable
objects. The 'netsnmp_create_watcher_info' call includes a single
size parameter, which is used for both current and maximum size.
If that's not correct, you'd have to fix it before actually registering
the watcher:
netsnmp_handler_registration *reg =
netsnmp_create_handler_registration( ..., handle_myObject, ... );
netsnmp_watcher_info *watch =
netsnmp_create_watcher_info( buf, sizeof( buf ),
ASN_OCTET_STRING,
WATCHER_MAX_SIZE);
+ watch->data_size = strlen( buf );
netsnmp_register_watched_scalar( reg, watch );
Or else initialise using 'strlen' and fix with:
watch->max_size = sizeof( buf );
The effect is the same.
Dave
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