2 * Copyright (c) 2016 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
19 #include <vlib/vlib.h>
20 #include <vnet/ip/format.h>
21 #include <vnet/fib/fib_entry.h>
22 #include <vnet/fib/fib_table.h>
23 #include <vnet/ip/lookup.h>
24 #include <vnet/dpo/load_balance.h>
26 extern fib_node_index_t ip6_fib_table_lookup(u32 fib_index,
27 const ip6_address_t *addr,
29 extern fib_node_index_t ip6_fib_table_lookup_exact_match(u32 fib_index,
30 const ip6_address_t *addr,
33 extern void ip6_fib_table_entry_remove(u32 fib_index,
34 const ip6_address_t *addr,
37 extern void ip6_fib_table_entry_insert(u32 fib_index,
38 const ip6_address_t *addr,
40 fib_node_index_t fib_entry_index);
41 extern void ip6_fib_table_destroy(u32 fib_index);
43 extern void ip6_fib_table_fwding_dpo_update(u32 fib_index,
44 const ip6_address_t *addr,
48 extern void ip6_fib_table_fwding_dpo_remove(u32 fib_index,
49 const ip6_address_t *addr,
53 u32 ip6_fib_table_fwding_lookup_with_if_index(ip6_main_t * im,
55 const ip6_address_t * dst);
58 * @brief Walk all entries in a FIB table
59 * N.B: This is NOT safe to deletes. If you need to delete walk the whole
60 * table and store elements in a vector, then delete the elements
62 extern void ip6_fib_table_walk(u32 fib_index,
63 fib_table_walk_fn_t fn,
67 ip6_fib_table_fwding_lookup (ip6_main_t * im,
69 const ip6_address_t * dst)
71 ip6_fib_table_instance_t *table;
74 BVT(clib_bihash_kv) kv, value;
77 table = &ip6_main.ip6_table[IP6_FIB_TABLE_FWDING];
78 len = vec_len (table->prefix_lengths_in_search_order);
80 kv.key[0] = dst->as_u64[0];
81 kv.key[1] = dst->as_u64[1];
82 fib = ((u64)((fib_index))<<32);
84 for (i = 0; i < len; i++)
86 int dst_address_length = table->prefix_lengths_in_search_order[i];
87 ip6_address_t * mask = &ip6_main.fib_masks[dst_address_length];
89 ASSERT(dst_address_length >= 0 && dst_address_length <= 128);
90 //As lengths are decreasing, masks are increasingly specific.
91 kv.key[0] &= mask->as_u64[0];
92 kv.key[1] &= mask->as_u64[1];
93 kv.key[2] = fib | dst_address_length;
95 rv = BV(clib_bihash_search_inline_2)(&table->ip6_hash, &kv, &value);
100 /* default route is always present */
106 * @brief Walk all entries in a sub-tree of the FIB table
107 * N.B: This is NOT safe to deletes. If you need to delete walk the whole
108 * table and store elements in a vector, then delete the elements
110 extern void ip6_fib_table_sub_tree_walk(u32 fib_index,
111 const fib_prefix_t *root,
112 fib_table_walk_fn_t fn,
116 * @brief return the DPO that the LB stacks on.
119 ip6_src_lookup_for_packet (ip6_main_t * im,
123 if (vnet_buffer (b)->ip.adj_index[VLIB_RX] == ~0)
128 lbi = ip6_fib_table_fwding_lookup_with_if_index(
130 vnet_buffer (b)->sw_if_index[VLIB_RX],
133 dpo = load_balance_get_bucket_i(load_balance_get(lbi), 0);
137 vnet_buffer (b)->ip.adj_index[VLIB_RX] = dpo->dpoi_index;
140 return vnet_buffer (b)->ip.adj_index[VLIB_RX];
144 * \brief Get or create an IPv6 fib.
146 * Get or create an IPv4 fib with the provided table ID.
151 * When set to \c ~0, an arbitrary and unused fib ID is picked
152 * and can be retrieved with \c ret->table_id.
153 * Otherwise, the fib ID to be used to retrieve or create the desired fib.
154 * \returns A pointer to the retrieved or created fib.
157 extern u32 ip6_fib_table_find_or_create_and_lock(u32 table_id,
159 extern u32 ip6_fib_table_create_and_lock(fib_source_t src,
160 fib_table_flags_t flags,
163 extern u8 *format_ip6_fib_table_memory(u8 * s, va_list * args);
165 static inline ip6_fib_t *
166 ip6_fib_get (fib_node_index_t index)
168 ASSERT(!pool_is_free_index(ip6_main.fibs, index));
169 return (pool_elt_at_index (ip6_main.v6_fibs, index));
173 u32 ip6_fib_index_from_table_id (u32 table_id)
175 ip6_main_t * im = &ip6_main;
178 p = hash_get (im->fib_index_by_table_id, table_id);
185 extern u32 ip6_fib_table_get_index_for_sw_if_index(u32 sw_if_index);