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Diffstat (limited to 'hicn-plugin/src/faces/dpo_face.h')
| -rw-r--r-- | hicn-plugin/src/faces/dpo_face.h | 331 |
1 files changed, 331 insertions, 0 deletions
diff --git a/hicn-plugin/src/faces/dpo_face.h b/hicn-plugin/src/faces/dpo_face.h new file mode 100644 index 000000000..736c5c926 --- /dev/null +++ b/hicn-plugin/src/faces/dpo_face.h @@ -0,0 +1,331 @@ +/* + * 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 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); + + if (face == NULL) + { + hicn_face_id_t idx; + hicn_iface_add (&ip_address, sw_if, &idx, DPO_PROTO_IP4); + + face = hicn_dpoi_get_from_idx(idx); + + if (nat_addr->as_u32 == 0) + { + adj_nbr_walk(face->sw_if, + FIB_PROTOCOL_IP4, + hicn4_iface_adj_walk_cb, + face); + } + else + { + face->dpo.dpoi_type = DPO_FIRST; + face->dpo.dpoi_proto = DPO_PROTO_IP4; + face->dpo.dpoi_index = ~0; + face->dpo.dpoi_next_node = node_index; + } + + *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 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); + + if (face == NULL) + { + hicn_face_id_t idx; + hicn_iface_add ((ip46_address_t *) nat_addr, sw_if, &idx, DPO_PROTO_IP6); + + face = hicn_dpoi_get_from_idx(idx); + + face->dpo.dpoi_type = DPO_FIRST; + face->dpo.dpoi_proto = DPO_PROTO_IP6; + face->dpo.dpoi_index = ~0; + 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: + */ |