rendservices.c has two functions: rend_services_introduce rend_service_introduce One of these is called every second to consider adding new intro points to our services. The other one is called to handle an inbound INTRODUCE2 cell for a service. I suggest renaming them to something like: rend_consider_services_intro_points rend_service_receive_introduction Also worth noting that rend_service_validate_intro_early does nothing (/* TODO */).