[XFRM] STATE: Common receive function for route optimization extension headers.

XFRM_STATE_WILDRECV flag is introduced; the last resort state is set
it and receives packet which is not route optimized but uses such
extension headers i.e. Mobile IPv6 signaling (binding update and
acknowledgement).  A node enabled Mobile IPv6 adds the state.

Based on MIPL2 kernel patch.

Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 11f480b12952..f05371556cce 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -352,6 +352,7 @@ xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
         list_for_each_entry(x, xfrm_state_bydst+h, bydst) {
                 if (x->props.family == family &&
                     x->props.reqid == tmpl->reqid &&
+                    !(x->props.flags & XFRM_STATE_WILDRECV) &&
                     xfrm_state_addr_check(x, daddr, saddr, family) &&
                     tmpl->mode == x->props.mode &&
                     tmpl->id.proto == x->id.proto &&