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Diffstat (limited to 'src/vnet/adj/adj_nbr.h')
| -rw-r--r-- | src/vnet/adj/adj_nbr.h | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/src/vnet/adj/adj_nbr.h b/src/vnet/adj/adj_nbr.h new file mode 100644 index 00000000..293766b8 --- /dev/null +++ b/src/vnet/adj/adj_nbr.h @@ -0,0 +1,176 @@ +/* + * 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 |