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/*
* Copyright (c) 2017-2019 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_FACE_IP_H__
#define __HICN_FACE_IP_H__
#include <vlib/vlib.h>
#include <vnet/vnet.h>
#include "../face.h"
#include "../../cache_policies/cs_policy.h"
/**
* @file
*
* @brief IP face
*
* A face is carried through nodes as a dpo. The face state is the object
* pointed by the dpoi_index in the dpo_id_t (see
* https://docs.fd.io/vpp/18.07/d0/d37/dpo_8h_source.html)
*/
typedef struct hicn_ip_face_t_
{
/**
* The headers to paint, in packet painting order
*/
/* Local address of the interface sw_if */
ip46_address_t local_addr;
/* Remote address of neighbor */
ip46_address_t remote_addr;
} hicn_face_ip_t;
/**
* Hash tables that indexes a face by local address. For fast lookup when an
* data arrives.
*/
extern mhash_t hicn_face_ip_local_hashtb;
/**
* Hash tables that indexes a face by remote address. For fast lookup when an
* interest arrives.
*/
extern mhash_t hicn_face_ip_remote_hashtb;
/**
* Key definition for the mhash table. An ip face is uniquely identified by ip
* address and the interface id. The ip address can correspond to the remote ip
* address of the next hicn hop, or to the local address of the receiving
* interface. The former is used to retrieve the incoming face when an interest
* is received, the latter when the arring packet is a data.
*/
typedef struct hicn_face_ip_key_s
{
ip46_address_t addr;
u32 sw_if;
} hicn_face_ip_key_t;
extern hicn_face_type_t hicn_face_ip_type;
extern hicn_face_vft_t ip_vft;
/**
* @brief Create the key object for the mhash. Fill in the key object with the
* expected values.
*
* @param addr Local or remote ip v6 address of the face
* @param sw_if interface associated to the face
* @param key Pointer to an allocated hicn_face_ip_key_t object
*/
always_inline void
hicn_face_ip6_get_key (const ip6_address_t * addr,
u32 sw_if, hicn_face_ip_key_t * key)
{
key->addr.ip6 = *addr;
key->sw_if = sw_if;
}
/**
* @brief Create the key object for the mhash. Fill in the key object with the
* expected values.
*
* @param addr Local or remote ip v4 address of the face
* @param sw_if interface associated to the face
* @param key Pointer to an allocated hicn_face_ip_key_t object
*/
always_inline void
hicn_face_ip4_get_key (const ip4_address_t * addr,
u32 sw_if, hicn_face_ip_key_t * key)
{
ip46_address_set_ip4 (&(key->addr), addr);
key->sw_if = sw_if;
}
/**
* @brief Get the dpoi from the ip v4 address. Does not add any lock.
*
* @param addr Ip v4 address used to create the key for the hash table.
* @param sw_if Software interface id used to create the key for the hash table.
* @param hashtb Hash table (remote or local) where to perform the lookup.
*
* @result Pointer to the face.
*/
always_inline hicn_face_t *
hicn_face_ip4_get (const ip4_address_t * addr, u32 sw_if, mhash_t * hashtb)
{
hicn_face_ip_key_t key;
hicn_face_ip4_get_key (addr, sw_if, &key);
hicn_face_id_t *dpoi_index = (hicn_face_id_t *) mhash_get (hashtb,
&key);
return dpoi_index == NULL ? NULL : hicn_dpoi_get_from_idx (*dpoi_index);
}
/**
* @brief Get the dpoi from the ip v6 address. Does not add any lock.
*
* @param addr Ip v6 address used to create the key for the hash table.
* @param sw_if Software interface id used to create the key for the hash table.
* @param hashtb Hash table (remote or local) where to perform the lookup.
*
* @result Pointer to the face.
*/
always_inline hicn_face_t *
hicn_face_ip6_get (const ip6_address_t * addr, u32 sw_if, mhash_t * hashtb)
{
hicn_face_ip_key_t key;
hicn_face_ip6_get_key (addr, sw_if, &key);
hicn_face_id_t *dpoi_index = (hicn_face_id_t *) mhash_get (hashtb,
&key);
return dpoi_index == NULL ? NULL : hicn_dpoi_get_from_idx (*dpoi_index);
}
/**
* @brief Create a new face ip. API for other modules (e.g., routing)
*
* @param local_addr Local ip v4 or v6 address of the face
* @param remote_addr Remote ip v4 or v6 address of the face
* @param sw_if interface associated to the face
* @param is_app_face Boolean to set the face as an application face
* @param pfaceid Pointer to return the face id
* @return HICN_ERROR_FACE_NO_GLOBAL_IP if the face does not have a globally
* reachable ip address, otherwise HICN_ERROR_NONE
*/
int hicn_face_ip_add (const ip46_address_t * local_addr,
const ip46_address_t * remote_addr,
int swif, hicn_face_id_t * pfaceid);
/**
* @brief Create a new incomplete face ip. (Meant to be used by the data plane)
*
* @param local_addr Local ip v4 or v6 address of the face
* @param remote_addr Remote ip v4 or v6 address of the face
* @param sw_if interface associated to the face
* @param pfaceid Pointer to return the face id
* @return HICN_ERROR_FACE_NO_GLOBAL_IP if the face does not have a globally
* reachable ip address, otherwise HICN_ERROR_NONE
*/
always_inline void
hicn_iface_ip_add (const ip46_address_t * local_addr,
const ip46_address_t * remote_addr,
int sw_if, hicn_face_id_t * pfaceid)
{
hicn_face_t *face;
pool_get (hicn_dpoi_face_pool, face);
hicn_face_ip_t *ip_face = (hicn_face_ip_t *) (face->data);
clib_memcpy (&(ip_face->local_addr.ip6), local_addr,
sizeof (ip6_address_t));
clib_memcpy (&(ip_face->remote_addr.ip6), remote_addr,
sizeof (ip6_address_t));
face->shared.sw_if = sw_if;
face->shared.adj = ADJ_INDEX_INVALID;
face->shared.pl_id = (u16) 0;
face->shared.face_type = hicn_face_ip_type;
face->shared.flags = HICN_FACE_FLAGS_IFACE;
face->shared.locks = 0;
hicn_face_ip_key_t key;
hicn_face_ip6_get_key (&(remote_addr->ip6), sw_if, &key);
*pfaceid = hicn_dpoi_get_index (face);
mhash_set_mem (&hicn_face_ip_remote_hashtb, &key, (uword *) pfaceid, 0);
}
/**
* @brief Delete an ip face
*
* @param face_id Id of the face to delete
* @return HICN_ERROR_FACE_NOT_FOUND if the face does not exist, otherwise
* HICN_ERROR_NONE
*/
int hicn_face_ip_del (hicn_face_id_t face_id);
/**
* @brief Format a IP face
*
* @param s Pointer to a previous string. If null it will be initialize
* @param args Array storing input values. Expected u32 face_id and u32 indent
* @return String with the formatted face
*/
u8 *format_hicn_face_ip (u8 * s, va_list * args);
/**
* @brief Create a dpo from an ip face
*
* @param face Face from which to create the dpo
* @return the dpo
*/
void hicn_face_ip_get_dpo (hicn_face_t * face, dpo_id_t * dpo);
#endif // __HICN_FACE_IP_H__
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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