Changing Velocity Boundary Condition after each time-step

[hamidkavari]

Hi all,
I am running an inflow-outflow combustion simulation with the low-Mach assumption using a single-step mechanism.
For setting the velocity boundary condition, I put a fixed value in void velocityDirichletConditions(bcData *bc) for the y-dir velocity.
Now I want to calculate the consumption speed on-the-fly and change the boundary condition after each time-step to stabilize the flame.

As I understood, I can use UDF_ExecuteStep, which is executed after each time-step on the host side, and the problem is that I don't know how to point to bcData *bc because it is on the device side. The signature of UDF_ExecuteStep has only nrs_t *nrs expect time and tstep, which I couldn't find boundary conditions in its class.

This is all that I've got from the documentation and my problem. It would be great if anyone knows how can I solve this problem either on the host or device side of the code or any other suggestions are welcome.
Thank you very much for your help.