What are the network ioctl man pages?

Question

I would like to use the ioctl SIOCGIFADDR to determine the address of an interface in Linux. I found some web references that explain how to do this, but it seems like there should be some reference for this already on my system. Is there a man page (or something else) that describes SIOCGIFADDR and friends? man netdevice is close, but it doesn't have the ioctl in question.