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/*
* Copyright (c) 2016 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.
*/
/**
* @brief
* Neighbour Adjacency sub-type. These adjs represent an L3 peer on a
* connected link.
*/
#ifndef __ADJ_NBR_H__
#define __ADJ_NBR_H__
#include <vnet/vnet.h>
#include <vnet/adj/adj_types.h>
#include <vnet/fib/fib_node.h>
#include <vnet/dpo/dpo.h>
/**
* @brief
* Add (and lock) a new or lock an existing neighbour adjacency
*
* @param nh_proto
* The protocol for the next-hop address (v4 or v6)
*
* @param link_type
* A description of the protocol of the packets that will forward
* through this adj. On an ethernet interface this is the MAC header's
* ether-type
*
* @param nh_addr
* The address of the next-hop/peer to send the packet to
*
* @param sw_if_index
* The interface on which the peer resides
*/
extern adj_index_t adj_nbr_add_or_lock(fib_protocol_t nh_proto,
vnet_link_t link_type,
const ip46_address_t *nh_addr,
u32 sw_if_index);
/**
* @brief
* Add (and lock) a new or lock an existing neighbour adjacency
*
* @param nh_proto
* The protocol for the next-hop address (v4 or v6)
*
* @param link_type
* A description of the protocol of the packets that will forward
* through this adj. On an ethernet interface this is the MAC header's
* ether-type
*
* @param nh_addr
* The address of the next-hop/peer to send the packet to
*
* @param sw_if_index
* The interface on which the peer resides
*
* @param rewrite
* The rewrite to prepend to packets
*/
extern adj_index_t adj_nbr_add_or_lock_w_rewrite(fib_protocol_t nh_proto,
vnet_link_t link_type,
const ip46_address_t *nh_addr,
u32 sw_if_index,
u8 *rewrite);
/**
* @brief When adding a rewrite to an adjacency these are flags that
* apply to that rewrite
*/
typedef enum adj_nbr_rewrite_flag_t_
{
ADJ_NBR_REWRITE_FLAG_NONE,
/**
* An indication that the rewrite is incomplete, i.e. that it describes the
* ARP/ND rewrite when probing.
*/
ADJ_NBR_REWRITE_FLAG_INCOMPLETE = ADJ_NBR_REWRITE_FLAG_NONE,
/**
* An indication that the rewrite is complete, i.e. that it fully describes
* the link-layer addressing for the desintation.
* The opposite of this is an incomplete rewrite that describes the ARP/ND
* rewrite when probing.
*/
ADJ_NBR_REWRITE_FLAG_COMPLETE = (1 << 0),
} adj_nbr_rewrite_flag_t;
/**
* @brief
* Update the rewrite string for an existing adjacecny.
*
* @param
* The index of the adj to update
*
* @param
* The new rewrite
*/
extern void adj_nbr_update_rewrite(adj_index_t adj_index,
adj_nbr_rewrite_flag_t flags,
u8 *rewrite);
/**
* @brief
* Format aa incomplete neigbour (ARP) adjacency
*/
extern u8* format_adj_nbr_incomplete(u8* s, va_list *ap);
/**
* @brief
* Format a neigbour (REWRITE) adjacency
*/
extern u8* format_adj_nbr(u8* s, va_list *ap);
/**
* @brief Walk the neighbour Adjacencies on a given interface
*/
extern void adj_nbr_walk (u32 sw_if_index,
fib_protocol_t adj_nh_proto,
adj_walk_cb_t cb,
void *ctx);
/**
* @brief Walk the neighbour Adjacencies on a given interface with a given next-hop
*/
void
adj_nbr_walk_nh (u32 sw_if_index,
fib_protocol_t adj_nh_proto,
const ip46_address_t *nh,
adj_walk_cb_t cb,
void *ctx);
/**
* @brief Walk adjacencies on a link with a given v4 next-hop.
* that is visit the adjacencies with different link types.
*/
void
adj_nbr_walk_nh4 (u32 sw_if_index,
const ip4_address_t *addr,
adj_walk_cb_t cb,
void *ctx);
/**
* @brief Walk adjacencies on a link with a given v6 next-hop.
* that is visit the adjacencies with different link types.
*/
void
adj_nbr_walk_nh6 (u32 sw_if_index,
const ip6_address_t *addr,
adj_walk_cb_t cb,
void *ctx);
/**
* @brief
* Module initialisation
*/
extern void adj_nbr_module_init(void);
/**
* @brief
* Return the size of the adjacency database. for testing purposes
*/
extern u32 adj_nbr_db_size(void);
#endif
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