net: Add skb_inner_transport_offset function

Same thing as skb_transport_offset but returns the offset of the inner
transport header (when skb->encpasulation is set).

Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Herbert 2015-12-14 11:19:40 -08:00 • committed by David S. Miller
commit 55dc5a9f2f