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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 __MFIB_ENTRY_SRC_H__
+#define __MFIB_ENTRY_SRC_H__
+
+#include <vnet/mfib/mfib_entry.h>
+
+/**
+ * MFIB extensions to each path
+ */
+typedef struct mfib_path_ext_t_
+{
+ mfib_itf_flags_t mfpe_flags;
+ fib_node_index_t mfpe_path;
+} mfib_path_ext_t;
+
+/**
+ * The source of an MFIB entry
+ */
+typedef struct mfib_entry_src_t_
+{
+ /**
+ * Which source this is
+ */
+ mfib_source_t mfes_src;
+
+ /**
+ * Route flags
+ */
+ mfib_entry_flags_t mfes_flags;
+
+ /**
+ * The reference count on the entry. this is a u32
+ * since there is no path-list sharing in mfib, so the number
+ * os children could be high.
+ */
+ u32 mfes_ref_count;
+
+ /**
+ * The path-list of forwarding interfaces
+ */
+ fib_node_index_t mfes_pl;
+
+ /**
+ * RPF-ID
+ */
+ fib_rpf_id_t mfes_rpf_id;
+
+ /**
+ * Hash table of path extensions
+ */
+ mfib_path_ext_t *mfes_exts;
+
+ /**
+ * Covering entry (if needed)
+ */
+ struct {
+ fib_node_index_t mfes_cover;
+ u32 mfes_sibling;
+ };
+
+ /**
+ * The hash table of all interfaces.
+ * This is forwarding time information derived from the paths
+ * and their extensions.
+ */
+ mfib_itf_t *mfes_itfs;
+} mfib_entry_src_t;
+
+/**
+ * signals from the sources to the caller
+ */
+typedef enum mfib_src_res_t_
+{
+ MFIB_SRC_OK,
+ MFIB_SRC_REEVALUATE,
+} mfib_src_res_t;
+
+/**
+ * A function provided by each source to be invoked when it is activated
+ */
+typedef void (*mfib_entry_src_activiate_t) (mfib_entry_t*, mfib_entry_src_t*);
+
+/**
+ * A function provided by each source to be invoked when it is deactivated
+ */
+typedef void (*mfib_entry_src_deactiviate_t) (mfib_entry_t*, mfib_entry_src_t*);
+
+/**
+ * A function provided by each source to be invoked when the cover changes
+ */
+typedef mfib_src_res_t (*mfib_entry_src_cover_change_t) (mfib_entry_t*, mfib_entry_src_t*);
+
+/**
+ * A function provided by each source to be invoked when the cover is updated
+ */
+typedef mfib_src_res_t (*mfib_entry_src_cover_update_t) (mfib_entry_t*, mfib_entry_src_t*);
+
+/**
+ * Virtual function table provided by each_source
+ */
+typedef struct mfib_entry_src_vft_t_
+{
+ mfib_entry_src_activiate_t mev_activate;
+ mfib_entry_src_deactiviate_t mev_deactivate;
+ mfib_entry_src_cover_change_t mev_cover_change;
+ mfib_entry_src_cover_update_t mev_cover_update;
+} mfib_entry_src_vft;
+
+extern void mfib_entry_src_register(mfib_source_t, const mfib_entry_src_vft*);
+
+extern void mfib_entry_src_deactivate(mfib_entry_t *mfib_entry,
+ mfib_entry_src_t *bsrc);
+
+extern void mfib_entry_src_activate(mfib_entry_t *mfib_entry,
+ mfib_entry_src_t *bsrc);
+
+extern mfib_src_res_t mfib_entry_src_cover_change(mfib_entry_t *mfib_entry,
+ mfib_entry_src_t *bsrc);
+
+extern mfib_src_res_t mfib_entry_src_cover_update(mfib_entry_t *mfib_entry,
+ mfib_entry_src_t *bsrc);
+
+extern mfib_entry_src_t* mfib_entry_get_best_src(const mfib_entry_t *mfib_entry);
+
+extern void mfib_entry_src_module_init(void);
+extern void mfib_entry_src_rr_module_init(void);
+
+#endif