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diff --git a/hicn-plugin/src/faces/dpo_face.h b/hicn-plugin/src/faces/dpo_face.h
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--- a/hicn-plugin/src/faces/dpo_face.h
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-/*
- * Copyright (c) 2017-2020 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 __HICN_DPO_H__
-#define __HICN_DPO_H__
-
-#include <vnet/vnet.h>
-#include <vnet/ip/ip4_packet.h>
-#include <vnet/adj/adj_midchain.h>
-
-#include "face.h"
-#include "../error.h"
-
-/**
- * @brief Initialize the internal structures of the dpo ip face module.
- */
-//void hicn_dpo_ip_module_init (void);
-
-
-/**
- * @brief Retrieve a vector of faces from the ip4 local address and returns its index.
- *
- * @param vec: Result of the lookup. If no face exists for the local address vec = NULL
- * @param hicnb_flags: Flags that indicate whether the face is an application
- * face or not
- * @param local_addr: Ip v4 nat address of the face
- * @param sw_if: software interface id of the face
- *
- * @result HICN_ERROR_FACE_NOT_FOUND if the face does not exist, otherwise HICN_ERROR_NONE.
- */
-always_inline int
-hicn_dpo_face_ip4_lock (hicn_face_id_t * face_id,
- u32 * in_faces_vec_id,
- u8 * hicnb_flags,
- const ip4_address_t * nat_addr)
-{
- ip46_address_t ip_address = {0};
- ip46_address_set_ip4(&ip_address, nat_addr);
- hicn_face_input_faces_t *in_faces_vec =
- hicn_face_get_vec (&ip_address, &hicn_face_vec_hashtb);
-
- if (PREDICT_FALSE (in_faces_vec == NULL))
- return HICN_ERROR_FACE_NOT_FOUND;
-
- *in_faces_vec_id = in_faces_vec->vec_id;
- hicn_face_t *face = hicn_dpoi_get_from_idx (in_faces_vec->face_id);
-
- *hicnb_flags = HICN_BUFFER_FLAGS_DEFAULT;
- *hicnb_flags |=
- (face->flags & HICN_FACE_FLAGS_APPFACE_PROD) >>
- HICN_FACE_FLAGS_APPFACE_PROD_BIT;
-
- *face_id = in_faces_vec->face_id;
-
- return HICN_ERROR_NONE;
-}
-
-/**
- * @brief Retrieve a face from the ip6 local address and returns its dpo. This
- * method adds a lock on the face state.
- *
- * @param dpo: Result of the lookup. If the face doesn't exist dpo = NULL
- * @param hicnb_flags: Flags that indicate whether the face is an application
- * face or not
- * @param nat_addr: Ip v6 nat address of the face
- * @param sw_if: software interface id of the face
- *
- * @result HICN_ERROR_FACE_NOT_FOUND if the face does not exist, otherwise HICN_ERROR_NONE.
- */
-always_inline int
-hicn_dpo_face_ip6_lock (hicn_face_id_t * face_id,
- u32 * in_faces_vec_id,
- u8 * hicnb_flags,
- const ip6_address_t * nat_addr)
-{
- hicn_face_input_faces_t *in_faces_vec =
- hicn_face_get_vec ((ip46_address_t *)nat_addr, &hicn_face_vec_hashtb);
-
- if (PREDICT_FALSE (in_faces_vec == NULL))
- return HICN_ERROR_FACE_NOT_FOUND;
-
- *in_faces_vec_id = in_faces_vec->vec_id;
- hicn_face_t *face = hicn_dpoi_get_from_idx (in_faces_vec->face_id);
-
- *hicnb_flags = HICN_BUFFER_FLAGS_DEFAULT;
- *hicnb_flags |=
- (face->flags & HICN_FACE_FLAGS_APPFACE_PROD) >>
- HICN_FACE_FLAGS_APPFACE_PROD_BIT;
-
- *face_id = in_faces_vec->face_id;
-
- return HICN_ERROR_NONE;
-}
-
-/**
- * @brief Call back to get the adj of the tunnel
- */
-static adj_walk_rc_t
-hicn4_iface_adj_walk_cb (adj_index_t ai,
- void *ctx)
-{
-
- hicn_face_t *face = (hicn_face_t *)ctx;
-
- dpo_set(&face->dpo, DPO_ADJACENCY_MIDCHAIN, DPO_PROTO_IP4, ai);
- adj_nbr_midchain_stack(ai, &face->dpo);
-
- return (ADJ_WALK_RC_CONTINUE);
-}
-
-/**
- * @brief Retrieve, or create if it doesn't exist, a face from the ip6 local
- * address and returns its dpo. This method adds a lock on the face state.
- *
- * @param dpo: Result of the lookup
- * @param hicnb_flags: Flags that indicate whether the face is an application
- * face or not
- * @param nat_addr: Ip v4 remote address of the face
- * @param sw_if: software interface id of the face
- * @param node_index: vlib edge index to use in the packet processing
- */
-always_inline void
-hicn_dpo_iface_ip4_add_and_lock (hicn_face_id_t * index,
- u8 * hicnb_flags,
- const ip4_address_t * nat_addr,
- u32 sw_if, u32 adj_index, u32 node_index)
-{
- /*All (complete) faces are indexed by remote addess as well */
-
- ip46_address_t ip_address = {0};
- ip46_address_set_ip4(&ip_address, nat_addr);
-
- /* if the face exists, it adds a lock */
- hicn_face_t *face =
- hicn_face_get (&ip_address, sw_if, &hicn_face_hashtb, adj_index);
-
- if (face == NULL)
- {
- hicn_face_id_t idx;
- hicn_iface_add (&ip_address, sw_if, &idx, DPO_PROTO_IP4, adj_index);
-
- face = hicn_dpoi_get_from_idx(idx);
-
- face->dpo.dpoi_type = DPO_FIRST;
- face->dpo.dpoi_proto = DPO_PROTO_IP4;
- face->dpo.dpoi_index = adj_index;
- face->dpo.dpoi_next_node = node_index;
-
- /* if (nat_addr->as_u32 == 0) */
- /* { */
- adj_nbr_walk(face->sw_if,
- FIB_PROTOCOL_IP4,
- hicn4_iface_adj_walk_cb,
- face);
- /* } */
-
- *hicnb_flags = HICN_BUFFER_FLAGS_DEFAULT;
-
- *index = idx;
- return;
- }
- else
- {
- /* unlock the face. We don't take a lock on each interest we receive */
- hicn_face_id_t face_id = hicn_dpoi_get_index(face);
- hicn_face_unlock_with_id(face_id);
- }
-
- /* Code replicated on purpose */
- *hicnb_flags = HICN_BUFFER_FLAGS_DEFAULT;
- *hicnb_flags |=
- (face->flags & HICN_FACE_FLAGS_APPFACE_PROD) >>
- HICN_FACE_FLAGS_APPFACE_PROD_BIT;
-
- *index = hicn_dpoi_get_index (face);
-}
-
-/**
- * @brief Call back to get the adj of the tunnel
- */
-static adj_walk_rc_t
-hicn6_iface_adj_walk_cb (adj_index_t ai,
- void *ctx)
-{
-
- hicn_face_t *face = (hicn_face_t *)ctx;
-
- ip_adjacency_t *adj = adj_get(ai);
- if ((adj->lookup_next_index == IP_LOOKUP_NEXT_MIDCHAIN) ||
- (adj->lookup_next_index == IP_LOOKUP_NEXT_MCAST_MIDCHAIN))
- {
- dpo_set(&face->dpo, DPO_ADJACENCY_MIDCHAIN, adj->ia_nh_proto, ai);
- adj_nbr_midchain_stack(ai, &face->dpo);
- }
-
- return (ADJ_WALK_RC_CONTINUE);
-}
-
-
-/**
- * @brief Retrieve, or create if it doesn't exist, a face from the ip6 local
- * address and returns its dpo. This method adds a lock on the face state.
- *
- * @param dpo: Result of the lookup
- * @param hicnb_flags: Flags that indicate whether the face is an application
- * face or not
- * @param nat_addr: Ip v6 remote address of the face
- * @param sw_if: software interface id of the face
- * @param node_index: vlib edge index to use in the packet processing
- */
-always_inline void
-hicn_dpo_iface_ip6_add_and_lock (hicn_face_id_t * index,
- u8 * hicnb_flags,
- const ip6_address_t * nat_addr,
- u32 sw_if, u32 adj_index, u32 node_index)
-{
- /*All (complete) faces are indexed by remote addess as well */
- /* if the face exists, it adds a lock */
- hicn_face_t *face =
- hicn_face_get ((ip46_address_t *)nat_addr, sw_if, &hicn_face_hashtb, adj_index);
-
- if (face == NULL)
- {
- hicn_face_id_t idx;
- hicn_iface_add ((ip46_address_t *) nat_addr, sw_if, &idx, DPO_PROTO_IP6, adj_index);
-
- face = hicn_dpoi_get_from_idx(idx);
-
- face->dpo.dpoi_type = DPO_FIRST;
- face->dpo.dpoi_proto = DPO_PROTO_IP6;
- face->dpo.dpoi_index = adj_index;
- face->dpo.dpoi_next_node = node_index;
-
- //if (ip46_address_is_zero((ip46_address_t *)nat_addr))
- // {
- adj_nbr_walk(face->sw_if,
- FIB_PROTOCOL_IP6,
- hicn6_iface_adj_walk_cb,
- face);
- // }
-
- *hicnb_flags = HICN_BUFFER_FLAGS_DEFAULT;
-
- *index = idx;
-
- return;
- }
- else
- {
- /* unlock the face. We don't take a lock on each interest we receive */
- hicn_face_id_t face_id = hicn_dpoi_get_index(face);
- hicn_face_unlock_with_id(face_id);
- }
-
- /* Code replicated on purpose */
- *hicnb_flags = HICN_BUFFER_FLAGS_DEFAULT;
- *hicnb_flags |=
- (face->flags & HICN_FACE_FLAGS_APPFACE_PROD) >>
- HICN_FACE_FLAGS_APPFACE_PROD_BIT;
-
- *index = hicn_dpoi_get_index (face);
-}
-
-
-/* /\** */
-/* * @brief Create an ip face and its corresponding dpo. Meant to be used for the */
-/* * control plane. */
-/* * */
-/* * @param dpo: Data plane object that point to the face created. */
-/* * @param local_addr: Ip v4 local address of the face */
-/* * @param remote_addr: Ip v4 remote address of the face */
-/* * @param sw_if: software interface id of the face */
-/* * @param adj: Ip adjacency corresponding to the remote address in the face */
-/* * @param node_index: vlib edge index to use in the packet processing */
-/* * @param flags: Flags of the face */
-/* * @param face_id: Identifier for the face (dpoi_index) */
-/* * @return HICN_ERROR_FACE_ALREADY_CREATED if the face exists, otherwise HICN_ERROR_NONE */
-/* *\/ */
-/* int hicn_dpo_ip4_create (dpo_id_t * dpo, */
-/* const ip4_address_t * local_addr, */
-/* const ip4_address_t * remote_addr, */
-/* u32 sw_if, */
-/* adj_index_t adj, */
-/* u32 node_index, */
-/* hicn_face_flags_t flags, hicn_face_id_t * face_id); */
-
-/* /\** */
-/* * @brief Create an ip face and its corresponding dpo. Meant to be used for the */
-/* * control plane. */
-/* * */
-/* * @param dpo: Data plane object that point to the face created. */
-/* * @param local_addr: Ip v6 local address of the face */
-/* * @param remote_addr: Ip v6 remote address of the face */
-/* * @param sw_if: software interface id of the face */
-/* * @param adj: Ip adjacency corresponding to the remote address in the face */
-/* * @param node_index: vlib edge index to use in the packet processing */
-/* * @param flags: Flags of the face */
-/* * @param face_id: Identifier for the face (dpoi_index) */
-/* * @return HICN_ERROR_FACE_ALREADY_CREATED if the face exists, otherwise HICN_ERROR_NONE */
-/* *\/ */
-/* int hicn_dpo_ip6_create (dpo_id_t * dpo, */
-/* const ip6_address_t * local_addr, */
-/* const ip6_address_t * remote_addr, */
-/* u32 sw_if, */
-/* adj_index_t adj, */
-/* u32 node_index, */
-/* hicn_face_flags_t flags, hicn_face_id_t * face_id); */
-
-#endif // __HICN_DPO_IP_H__
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */