[HICN-591] Created new command "hicn enable <prefix>" that enable hicn on a given prefix

The changes include:
 - we use now a different vrf for the hicn routes. The default vrf (fib) contains
   every route, we sync the route we marked as hicn on the hicn vrf. In the vrf
   we use a custom dpo to implement the forwarding strategy.

Change-Id: I399805eff8a62a5c41bf7b50831986a35bce4f76
Signed-off-by: Alberto Compagno <acompagn+fdio@cisco.com>

3 files changed, 12 insertions, 23 deletions

diff --git a/hicn-plugin/src/faces/app/face_prod.c b/hicn-plugin/src/faces/app/face_prod.c
index 5aed8c11e..c5b9f93dd 100644
--- a/hicn-plugin/src/faces/app/face_prod.c
+++ b/hicn-plugin/src/faces/app/face_prod.c
@@ -275,6 +275,7 @@ hicn_face_prod_add (fib_prefix_t * prefix, u32 sw_if, u32 * cs_reserved,
                                  FIB_SOURCE_CLI,
                                  FIB_ENTRY_FLAG_NONE, rpaths);
 
+      hicn_route_enable(prefix);
       hicn_app_state_create (sw_if, prefix);
     }
 
@@ -307,6 +308,7 @@ hicn_face_prod_del (hicn_face_id_t face_id)
   if (face->flags & HICN_FACE_FLAGS_APPFACE_PROD)
     {
       /* Remove the face from the fib */
+      hicn_route_disable(&(face_state_vec[face->sw_if].prefix));
       //hicn_route_del_nhop (&(face_state_vec[face->sw_if].prefix),
       //			   face_id);
 
diff --git a/hicn-plugin/src/faces/face.h b/hicn-plugin/src/faces/face.h
index 1c829d2c2..665492a84 100644
--- a/hicn-plugin/src/faces/face.h
+++ b/hicn-plugin/src/faces/face.h
@@ -339,7 +339,7 @@ extern mhash_t hicn_face_vec_hashtb;
  * interface. The former is used to retrieve the incoming face when an interest
  * is received, the latter when the arring packet is a data.
  */
-typedef struct hicn_face_key_s
+typedef struct __attribute__ ((packed)) hicn_face_key_s
 {
   ip46_address_t addr;
   union {
@@ -396,6 +396,15 @@ hicn_face_get (const ip46_address_t * addr, u32 sw_if, mhash_t * hashtb)
   return NULL;
 }
 
+/**
+ * @brief Get the dpoi from the nat address. Does not add any lock.
+ *
+ * @param addr Ip v4 address used to create the key for the hash table.
+ * @param sw_if Software interface id used to create the key for the hash table.
+ * @param hashtb Hash table (remote or local) where to perform the lookup.
+ *
+ * @result Pointer to the face.
+ */
 always_inline hicn_face_t *
 hicn_face_get_with_dpo (const ip46_address_t * addr, u32 sw_if, const dpo_id_t * dpo, mhash_t * hashtb)
 {
diff --git a/hicn-plugin/src/faces/iface_node.c b/hicn-plugin/src/faces/iface_node.c
index 5def03417..b952787a4 100644
--- a/hicn-plugin/src/faces/iface_node.c
+++ b/hicn-plugin/src/faces/iface_node.c
@@ -34,28 +34,6 @@ vlib_node_registration_t hicn6_iface_output_node;
 u32 data_fwd_iface_ip4_vlib_edge;
 u32 data_fwd_iface_ip6_vlib_edge;
 
-void
-hicn_iface_ip_init (vlib_main_t * vm)
-{
-  u32 temp_index4 = vlib_node_add_next (vm,
-					hicn_interest_hitcs_node.index,
-					hicn4_iface_output_node.index);
-  u32 temp_index6 = vlib_node_add_next (vm,
-					hicn_interest_hitcs_node.index,
-					hicn6_iface_output_node.index);
-
-  data_fwd_iface_ip4_vlib_edge = vlib_node_add_next (vm,
-						     hicn_data_fwd_node.index,
-						     hicn4_iface_output_node.index);
-
-  data_fwd_iface_ip6_vlib_edge = vlib_node_add_next (vm,
-						     hicn_data_fwd_node.index,
-						     hicn6_iface_output_node.index);
-
-  ASSERT (temp_index4 == data_fwd_iface_ip4_vlib_edge);
-  ASSERT (temp_index6 == data_fwd_iface_ip6_vlib_edge);
-}
-
 static char *hicn4_iface_input_error_strings[] = {
 #define _(sym, string) string,
   foreach_hicnfwd_error