Cdf for Dirichlet distribution

Question

I want to run an evaluation, assuming my variables are distributed according to the Dirichlet distribution. For this I need to use the cdf function. For all distributions in R, there are corresponding functions r, p and d, which produce random variables pdf and cdf. However, for Dirichlet, I can find a random number generator and PDF. Is there a similar package for R that gives cdf?

Many thanks,