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diff --git a/src/plugins/gbp/gbp_bridge_domain.h b/src/plugins/gbp/gbp_bridge_domain.h
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+/*
+ * Copyright (c) 2018 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __GBP_BRIDGE_DOMAIN_H__
+#define __GBP_BRIDGE_DOMAIN_H__
+
+#include <plugins/gbp/gbp_types.h>
+
+#include <vnet/fib/fib_types.h>
+
+/**
+ * A bridge Domain Representation.
+ * This is a standard bridge-domain plus all the attributes it must
+ * have to supprt the GBP model.
+ */
+typedef struct gpb_bridge_domain_t_
+{
+  /**
+   * Bridge-domain ID
+   */
+  u32 gb_bd_id;
+  u32 gb_bd_index;
+
+  /**
+   * The BD's BVI interface (obligatory)
+   */
+  u32 gb_bvi_sw_if_index;
+
+  /**
+   * The BD's MAC spine-proxy interface (optional)
+   */
+  u32 gb_uu_fwd_sw_if_index;
+
+  /**
+   * The BD's VNI interface on which packets from unkown endpoints
+   * arrive
+   */
+  u32 gb_vni_sw_if_index;
+
+  /**
+   * locks/references to the BD so it does not get deleted (from the API)
+   * whilst it is still being used
+   */
+  u32 gb_locks;
+} gbp_bridge_domain_t;
+
+extern int gbp_bridge_domain_add_and_lock (u32 bd_id,
+					   u32 bvi_sw_if_index,
+					   u32 uu_fwd_sw_if_index);
+extern void gbp_bridge_domain_unlock (index_t gbi);
+extern index_t gbp_bridge_domain_find_and_lock (u32 bd_id);
+extern int gbp_bridge_domain_delete (u32 bd_id);
+extern gbp_bridge_domain_t *gbp_bridge_domain_get (index_t i);
+
+typedef int (*gbp_bridge_domain_cb_t) (gbp_bridge_domain_t * gb, void *ctx);
+extern void gbp_bridge_domain_walk (gbp_bridge_domain_cb_t bgpe, void *ctx);
+
+extern u8 *format_gbp_bridge_domain (u8 * s, va_list * args);
+
+#endif
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */