PA-28 Cherokee/Archer/Dakota/Pillan/Warrior
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 25
Communication Breakdown; Distraction; Situational Awareness
ATC Issue All Types; Airspace Violation All Types; Conflict Airborne Conflict; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Issued Advisory / Alert
Procedure; Human Factors; Airspace Structure
We had Aircraft Y inbound on a 4 mile final descending out of 2100 on the ILS approach cleared to land Runway 26R. SCT (SoCal) had Aircraft X inbound to RAL on an 8 mile final descending out of 2200 about a mile south of course. SCT's airspace is at 2700. CNO's is 2500 and below.The aircraft passed within 100 feet vertically and less than a half mile horizontally opposite direction. SCT's aircraft was south of ours.  SCT did NOT point out Aircraft X by either display of verbally. We did give the traffic to Aircraft Y and the pilot reported traffic in sight. Daily; SCT violates our airspace with aircraft inbound to RAL on the ILS.Either SCT points out aircraft to us; or change the approach into RAL airport.
CNO Controller reports of an airspace violation and an airborne conflict caused by the overlying TRACON not giving them a point out or remaining clear of the Tower's airspace.