On 13/09/2012 08:06, Paul Stimpson wrote: > > Keith Edmunds <k...@midnighthax.com> wrote: > >> Are you certain that every UID in the folder exists on the device? > > The device is a multimedia receiver (primarily a satellite receiver > but there are options such as an IP input for decoding streamed media > over a network). There are also software options that can be > activated after purchase with license codes but I've never seen a > device with all of them purchased. > > I don't know if every UID in the tree exists on the device but some > of them certainly will have no valid meaning as all the options can't > be present because some of them are mutually exclusive (such as the > satellite and network inputs as these are hardware options and occupy > the same physical module slot in the unit). However, I don't know > whether the unit will respond with an error or with an dummy value > such as zeros if you ask for the satellite tuner frequency for a > device with the IP input installed.
If the device doesn't support a particular OID, you will get a meaningful error to that effect. What happens if the device does support an OID but has no meaningful data to pass back is largely implementation dependent, but should at least follow the data semantics given in the MIB. Regards, Chris -- Chris Smith <cj...@zepler.net>
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