Commit 28121617 authored Jun 18, 2007 by Patrick McHardy Committed by David S. Miller Jun 18, 2007

[XFRM]: Fix MTU calculation for non-ESP SAs



My IPsec MTU optimization patch introduced a regression in MTU calculation
for non-ESP SAs, the SA's header_len needs to be subtracted from the MTU if
the transform doesn't provide a ->get_mtu() function.

Reported-and-tested-by: Marco Berizzi <pupilla@hotmail.com>

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent fa490cfd

net/xfrm/xfrm_state.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1729,7 +1729,7 @@ int xfrm_state_mtu(struct xfrm_state *x, int mtu)
		x->type && x->type->get_mtu)
		res = x->type->get_mtu(x, mtu);
		else
		res = mtu;
		res = mtu - x->props.header_len;
		spin_unlock_bh(&x->lock);
		return res;
		}