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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:
*/
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