gbp: add anonymous l3-out external interfaces

So far, GBP l3-out packets classification & policy relied on programmed
EP. All traffic to/from l3-out must go through a known EP.
This patch introduces a new feature where l3-out next-hops are only
known by their subnets (l3-out prefixes). As there are no longer known
EPs to program, an interface must be configured as external anonymous
l3-out. Packets classification & policy on this interface will rely on
the external subnets programmed in the BD VRF.
Note that contrary to all other interfaces in a GBP BD, external
anonymous l3-out interfaces have BD L2 learning turned on and rely on
ARP/ND.

Type: feature

Change-Id: Ieedb29dff4e967d08c4301e82d06bff450a63e5f
Signed-off-by: Benoît Ganne <bganne@cisco.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/src/plugins/gbp/gbp_api_print.h b/src/plugins/gbp/gbp_api_print.h
index 67cd30c7da7..b3afc94dc4b 100644
--- a/src/plugins/gbp/gbp_api_print.h
+++ b/src/plugins/gbp/gbp_api_print.h
@@ -340,6 +340,29 @@ vl_api_gbp_ext_itf_add_del_t_print (vl_api_gbp_ext_itf_add_del_t * a,
   return handle;
 }
 
+static inline void *
+vl_api_gbp_ext_itf_anon_add_del_t_print (vl_api_gbp_ext_itf_anon_add_del_t *
+					 a, void *handle)
+{
+  u8 *s = 0;
+
+  s = format (s, "SCRIPT: gbp_ext_itf_anon_add_del ");
+  if (a->is_add)
+    s = format (s, "add ");
+  else
+    s = format (s, "del ");
+
+  s = format (s, "sw_if_index %d ", ntohl (a->ext_itf.sw_if_index));
+  s = format (s, "bd_id %d ", ntohl (a->ext_itf.bd_id));
+  s = format (s, "rd_id %d ", ntohl (a->ext_itf.rd_id));
+
+  s = format (s, "\n");
+
+  PRINT_S;
+
+  return handle;
+}
+
 /*
  * fd.io coding-style-patch-verification: ON
  *