Customer has a clogged bathtub that was not draining. Attempted to snake drain via over flow but was unable to get through P trap to clear the clog. Noticed there was an access panel for the waste and overlfow in the closet. Removed overflow riser and snaked down and was able to pull out hair but was still unable to get past P trap. Ran water for several minutes and everything was draining. Once I removed access panel I noticed there was water in basin under bathtub, it appears the drain connected to the bath tub is leaking and there is some corrosion and cracks in bathtub right where drain is connected. I highly recommend replacement of waste and overflow to fix the leaking drain. Once drain is removed I will be able to inspect the condition of the bathtub drain hole and hopefully replacing the drain cover will cover the corrosion. If not there is a possibility that customer may need to replace bathtub.