[Click] dynamic IP-in-IP encapsulation

[Yi Wang]

Hello,

Is there an efficient way to do dynamic IP-in-IP encapsulation in Click, 
e.g., after a packet passes through a IPRouteTable, encapsulate it with 
the new destination address set to the dst address in the annotation.

It seems to me that the IPEncap only does static encapsulation. Does it 
mean that I need to do some hack to do dynamic IP-in-IP encapsulation? 
One such way may be to add a new IP header to packets before they enter 
the IPRouteTable, and rewrite the outer destination address using the 
annotation after the lookup. But I was wondering if there is better way 
to do this.

Thanks a lot in advance.

Yi