Delete an existing IPv6 address

["Xiaoning He" <xiaoning@xxxxxxxxxxxxxxxxxx>]

Hi All

While I am modifying the IPv6 kernel, I need to delete an exiting IP
address when it is necessary. 

I have to questions, could anyone please to help me out?

1. Is the IPv6 address has a lifetime associated with it? It seems after
a router advertisement is received, the address will be there forever.

2. How to remove this address? Is there any code available showing how
to program in the kernel to remove the address? What functions should I
use and how to use them?

Thank you very much for your helps.

Xiaoning He