ipsec: Use bihash for tunnel lookup

Type: improvement

Change-Id: I0c82722dfce990345fe6eeecdb335678543367e0
Signed-off-by: Neale Ranns <nranns@cisco.com>
diff --git a/src/vnet/ipsec/ipsec.h b/src/vnet/ipsec/ipsec.h
index 3d84ad3..fe44b80 100644
--- a/src/vnet/ipsec/ipsec.h
+++ b/src/vnet/ipsec/ipsec.h
@@ -26,6 +26,10 @@
 #include <vnet/ipsec/ipsec_spd_policy.h>
 #include <vnet/ipsec/ipsec_sa.h>
 
+#include <vppinfra/bihash_8_8.h>
+
+#include <vppinfra/bihash_24_8.h>
+
 typedef clib_error_t *(*add_del_sa_sess_cb_t) (u32 sa_index, u8 is_add);
 typedef clib_error_t *(*check_support_cb_t) (ipsec_sa_t * sa);
 typedef clib_error_t *(*enable_disable_cb_t) (int is_enable);
@@ -125,8 +129,9 @@
   uword *ipsec6_if_pool_index_by_key;
   uword *ipsec_if_real_dev_by_show_dev;
   uword *ipsec_if_by_sw_if_index;
-  uword *tun4_protect_by_key;
-  uword *tun6_protect_by_key;
+
+  clib_bihash_8_8_t tun4_protect_by_key;
+  clib_bihash_24_8_t tun6_protect_by_key;
 
   /* node indices */
   u32 error_drop_node_index;