[XFRM]: State selection update to use inner addresses.

This patch modifies the xfrm state selection logic to use the inner
addresses where the outer have been (incorrectly) used. This is
required for beet mode in general and interfamily setups in both
tunnel and beet mode.
Signed-off-by: NJoakim Koskela <jookos@gmail.com>
Signed-off-by: NHerbert Xu     <herbert@gondor.apana.org.au>
Signed-off-by: NDiego Beltrami <diego.beltrami@gmail.com>
Signed-off-by: NMiika Komu     <miika@iki.fi>
Acked-by: NPatrick McHardy <kaber@trash.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/xfrm/xfrm_policy.c

@@ -1299,7 +1299,8 @@ xfrm_tmpl_resolve_one(struct xfrm_policy *policy, struct flowi *fl,
 		xfrm_address_t *local  = saddr;
 		struct xfrm_tmpl *tmpl = &policy->xfrm_vec[i];
 
-		if (tmpl->mode == XFRM_MODE_TUNNEL) {
+		if (tmpl->mode == XFRM_MODE_TUNNEL ||
+		    tmpl->mode == XFRM_MODE_BEET) {
 			remote = &tmpl->id.daddr;
 			local = &tmpl->saddr;
 			family = tmpl->encap_family;

net/xfrm/xfrm_state.c

@@ -611,7 +611,7 @@ xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
 			      selector.
 			 */
 			if (x->km.state == XFRM_STATE_VALID) {
-				if (!xfrm_selector_match(&x->sel, fl, family) ||
+				if (!xfrm_selector_match(&x->sel, fl, x->sel.family) ||
 				    !security_xfrm_state_pol_flow_match(x, pol, fl))
 					continue;
 				if (!best ||
@@ -623,7 +623,7 @@ xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
 				acquire_in_progress = 1;
 			} else if (x->km.state == XFRM_STATE_ERROR ||
 				   x->km.state == XFRM_STATE_EXPIRED) {
-				if (xfrm_selector_match(&x->sel, fl, family) &&
+				if (xfrm_selector_match(&x->sel, fl, x->sel.family) &&
 				    security_xfrm_state_pol_flow_match(x, pol, fl))
 					error = -ESRCH;
 			}