To back up
Easy Street's map, this is the one from Newsnight last night. Although the aircraft probably did fly through a couple of kilometres of Turkish airspace, it was actually hit after it had left. Probably too far outside the border to account for time of flight of the missile. In the screenshot image below the aircraft was hit at the position marked 9:24. They reported that it was a Sidewinder.
If the purple (F-16) track is anything to go by, it looks like a stern shot. Even at max range for 20,000' the rule-of-thumb time of flight would have put the target well outside the border at launch. If it was a beam shot or hotter, as other versions suggest, the time of flight is even less so the target was even more likely to be in Syria.
All the above assumes the map and positions are reasonably accurate - but who knows, eh? The Russian version of events suggests a front sector shot, but that version shows the target never entering Turkish airspace so is pretty much a moot point.
I agree with Easy Street. This would appear to be a shot taken in Syria. Turkey are either telling Russia to stop intruding their area or they are protecting the Rebels in Northern Syria. Probably both in my opinion.