Yes. That's one device, with different functions.

One function finds range. One function lays Augmented Reality into a users vision field. Another function manages ammunition.

What's the problem?

There is none... if you hack the smartgun, you get access to any of them.
If you hack the cyberarm because someone left it's interfaces on, you do so, too.

Doubtful - A trained physical reflex would do the job just as well, and close a major security loophole.

A smartlink has an induction port in the palm, that interfaces with the weapon. That means it already has a fingerprint in that portion of the body - A trained reflex with a finger isn't too far fetched. This is assuming that smartlinked weapons don't just have a little button on the side that can be quickly tapped with a finger to force an ejection.

I can see anyone who has a run of the mill cyberlimb with no augments or additions or special abilities would probably turn off any wireless connection to it and only have the automatic actions and DNI connections.
If they wanted more things attached, it would probably be wireless, and hence parts of it hackable.

But I can also see a hacker hack into the Commlink and be able to affect the cyberlimb, but have to go thru a bit if IC to get there.

As for the smartgun link, as long as it is wireless, the hacker can just hack the weapon, as it is geared to respond to commands sent to it. Again, as previously mentioned by ReallyBored, skinlink in the palm would remove this problem. That is as long as you set up the weapon to do only accept skinlink commands.

Well. I guess it boils down to the type of game you want to run.

If you have equipment installed into a cyberlimb that requires wireless access of some sort, then that equipment should be hackable, because the medium that it requires to transmit data, is hackable. The fine motor control part of a cyberlimb, however, should never require wireless access for anything, and thus should be unhackable.

If you're deadset on allowing all parts of any augmentation that have no functional benefit from using wireless communication, to be run wirelessly, you should make it clear to your players that it creates a huge, unrealistic security hole, and that they should run hardlines through their body instead, to fix that.

Further, as a player under a gaming environment that insisted cyberlimbs in their entirety could be hacked, rather than portions that relied on a hackable medium, I'd immediately inform my GM that I was getting pre-2070 augmentations, where cybernetic augmentations were hardlined. There is not a single reason why anyone would opt for 2070 technology over 2060 technology, unless the augmentation they were looking for absolutely -required- wireless technology.

There's just no way to justify the huge security hole you open yourself up to, when the benefit for doing so is non-existant.

It's not artificial at all. You're stating that any time a device has a single wireless component installed into it, the entire device is completely hackable. As if the servo-motor controls of a cyberarm would be wired-right together with the flip-up trideo unit installed into the forearm.

Which defies logic, playability, and the notion that technology has somehow 'advanced' over the last 10 years.

Heh.

Alright. So let me get this straight.

If I use a 2060 Cyberarm, and then install a cellular phone into it, I'm fine.

If I use a 2070 Cyberarm, and no additional pieces of equipment with wireless access into it, I'm fine.

If I use a 2070 Cyberarm, and include a cellular phone in it, someone can hack the servo-motor, despite the fact that there would be no reason to interface a servo-motor together with a cellular phone?

No.

There is only one question that matters:
Is there an active wireless network connection connected to the cyberarm itself?

The cyberarm itself is different that the cellular phone inside the cyberarm.

Therefore, there should never be, under any circumstance, a reason for the cyberarm to have an active wireless connection.

Whether or not the cellular phone, inside the cyberarm, has an active wireless interface will determine whether or not the cellular phone, inside the cyberarm, can be hacked.

Whether or not the cellular phone, inside the cyberarm, has an active wireless interface, will NOT determine whether or not the cybernetic arm, which has no purpose for open wireless connections, can be hacked.

I can't see a hacker taking control of your cyberarm to use it to strangle you, or even to fire your gun. I mostly see them either turning it off, or having it waving around randomly, fighting you for control of it, to stop you from doing......

The neural interfaces needed for control of a cyberlimb have to be huge, specially for fine control like fingers. So, the hacker could not figure out in a short time how to get your arm to point a gun at your head and pull the trigger.

Now, if he had a lot of time, like weeks, he could probably work something out to allow him to do stuff like that, but that is a long term hack, needing access to your arm a few times. Hmm, could make a great plot line....

Alright, alright. Can we agree that -if- the Cellular Phone had it's own DNI, seperate from the Cyberarm, it would not institute a security hole, in the cyberarm itself?

Grin
Sure, but if the cellphone is linked to the cyberears or cybereyes (to receive video or text or images)....

Even if the cellphone is only attached to your original ears, the hacker could still hack and cause painfull feedback until you turned off you phone. Hmm, which may have been the whole reason for the hack....