L2: ARP term - learn but don't send response to GARPs - vpp

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author	Neale Ranns <nranns@cisco.com>	2019-03-04 14:11:25 -0800
committer	John Lo <loj@cisco.com>	2019-03-05 03:54:52 +0000
commit	d2bb61417fdb37d192cf25583d7d8fb50be19291 (patch)
tree	ec22a41090dba6a200d0072c0f2a044fbcc8a6dc /src/vnet/ethernet
parent	e1ade684eb5a7e5743abfda47488165452cc5b64 (diff)

L2: ARP term - learn but don't send response to GARPs

Change-Id: I766767d27f37493dc9f2bde1297c1b620cd1e321 Signed-off-by: Neale Ranns <nranns@cisco.com>

Diffstat (limited to 'src/vnet/ethernet')

-rw-r--r--

src/vnet/ethernet/arp.c

1 files changed, 3 insertions, 0 deletions

/* * 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 The IPv4 FIB * * FIBs are composed of two prefix data-bases (akak tables). The non-forwarding * table contains all the routes that the control plane has programmed, the * forwarding table contains the sub-set of those routes that can be used to * forward packets. * In the IPv4 FIB the non-forwarding table is an array of hash tables indexed * by mask length, the forwarding table is an mtrie * * This IPv4 FIB is used by the protocol independent FIB. So directly using * this APIs in client code is not encouraged. However, this IPv4 FIB can be * used if all the client wants is an IPv4 prefix data-base */ #ifndef __IP4_FIB_H__ #define __IP4_FIB_H__ #include <vlib/vlib.h> #include <vnet/ip/ip.h> #include <vnet/fib/fib_entry.h> #include <vnet/fib/fib_table.h> #include <vnet/ip/ip4_mtrie.h> typedef struct ip4_fib_t_ { /** * Mtrie for fast lookups. Hash is used to maintain overlapping prefixes. * First member so it's in the first cacheline. */ ip4_fib_mtrie_t mtrie; /* Hash table for each prefix length mapping. */ uword *fib_entry_by_dst_address[33]; /* Table ID (hash key) for this FIB. */ u32 table_id; /* Index into FIB vector. */ u32 index; /* N-tuple classifier indices */ u32 fwd_classify_table_index; u32 rev_classify_table_index; } ip4_fib_t; extern fib_node_index_t ip4_fib_table_lookup(const ip4_fib_t *fib, const ip4_address_t *addr, u32 len); extern fib_node_index_t ip4_fib_table_lookup_exact_match(const ip4_fib_t *fib, const ip4_address_t *addr, u32 len); extern void ip4_fib_table_entry_remove(ip4_fib_t *fib, const ip4_address_t *addr, u32 len); extern void ip4_fib_table_entry_insert(ip4_fib_t *fib, const ip4_address_t *addr, u32 len, fib_node_index_t fib_entry_index); extern void ip4_fib_table_destroy(u32 fib_index); extern void ip4_fib_table_fwding_dpo_update(ip4_fib_t *fib, const ip4_address_t *addr, u32 len, const dpo_id_t *dpo); extern void ip4_fib_table_fwding_dpo_remove(ip4_fib_t *fib, const ip4_address_t *addr, u32 len, const dpo_id_t *dpo, fib_node_index_t cover_index); extern u32 ip4_fib_table_lookup_lb (ip4_fib_t *fib, const ip4_address_t * dst); /** * @brief Walk all entries in a FIB table * N.B: This is NOT safe to deletes. If you need to delete walk the whole * table and store elements in a vector, then delete the elements */ extern void ip4_fib_table_walk(ip4_fib_t *fib, fib_table_walk_fn_t fn, void *ctx); /** * @brief Get the FIB at the given index */ static inline ip4_fib_t * ip4_fib_get (u32 index) { return (pool_elt_at_index(ip4_main.v4_fibs, index)); } always_inline u32 ip4_fib_lookup (ip4_main_t * im, u32 sw_if_index, ip4_address_t * dst) { return (ip4_fib_table_lookup_lb( ip4_fib_get(vec_elt (im->fib_index_by_sw_if_index, sw_if_index)), dst)); } /** * @brief Get or create an IPv4 fib. * * Get or create an IPv4 fib with the provided table ID. * * @param table_id * When set to \c ~0, an arbitrary and unused fib ID is picked * and can be retrieved with \c ret->table_id. * Otherwise, the fib ID to be used to retrieve or create the desired fib. * @returns A pointer to the retrieved or created fib. * */ extern u32 ip4_fib_table_find_or_create_and_lock(u32 table_id); extern u32 ip4_fib_table_create_and_lock(void); static inline u32 ip4_fib_index_from_table_id (u32 table_id) { ip4_main_t * im = &ip4_main; uword * p; p = hash_get (im->fib_index_by_table_id, table_id); if (!p) return ~0; return p[0]; } extern u32 ip4_fib_table_get_index_for_sw_if_index(u32 sw_if_index); always_inline index_t ip4_fib_forwarding_lookup (u32 fib_index, const ip4_address_t * addr) { ip4_fib_mtrie_leaf_t leaf; ip4_fib_mtrie_t * mtrie; mtrie = &ip4_fib_get(fib_index)->mtrie; leaf = ip4_fib_mtrie_lookup_step_one (mtrie, addr); leaf = ip4_fib_mtrie_lookup_step (mtrie, leaf, addr, 2); leaf = ip4_fib_mtrie_lookup_step (mtrie, leaf, addr, 3); return (ip4_fib_mtrie_leaf_get_adj_index(leaf)); } #endif


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