src/vnet/fib/ip6_fib.h

   1 /*
   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:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   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.
  14  */
  15
  16 #ifndef __IP6_FIB_H__
  17 #define __IP6_FIB_H__
  18
  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>
  25
  26 extern fib_node_index_t ip6_fib_table_lookup(u32 fib_index,
  27                                              const ip6_address_t *addr,
  28                                              u32 len);
  29 extern fib_node_index_t ip6_fib_table_lookup_exact_match(u32 fib_index,
  30                                                          const ip6_address_t *addr,
  31                                                          u32 len);
  32
  33 extern void ip6_fib_table_entry_remove(u32 fib_index,
  34                                        const ip6_address_t *addr,
  35                                        u32 len);
  36
  37 extern void ip6_fib_table_entry_insert(u32 fib_index,
  38                                        const ip6_address_t *addr,
  39                                        u32 len,
  40                                        fib_node_index_t fib_entry_index);
  41 extern void ip6_fib_table_destroy(u32 fib_index);
  42
  43 extern void ip6_fib_table_fwding_dpo_update(u32 fib_index,
  44                                             const ip6_address_t *addr,
  45                                             u32 len,
  46                                             const dpo_id_t *dpo);
  47
  48 extern void ip6_fib_table_fwding_dpo_remove(u32 fib_index,
  49                                             const ip6_address_t *addr,
  50                                             u32 len,
  51                                             const dpo_id_t *dpo);
  52
  53 u32 ip6_fib_table_fwding_lookup_with_if_index(ip6_main_t * im,
  54                                               u32 sw_if_index,
  55                                               const ip6_address_t * dst);
  56 u32 ip6_fib_table_fwding_lookup(ip6_main_t * im,
  57                                 u32 fib_index,
  58                                 const ip6_address_t * dst);
  59
  60 /**
  61  * @biref return the DPO that the LB stacks on.
  62  */
  63 always_inline u32
  64 ip6_src_lookup_for_packet (ip6_main_t * im,
  65                            vlib_buffer_t * b,
  66                            ip6_header_t * i)
  67 {
  68     if (vnet_buffer (b)->ip.adj_index[VLIB_RX] == ~0)
  69     {
  70         const dpo_id_t *dpo;
  71         index_t lbi;
  72
  73         lbi = ip6_fib_table_fwding_lookup_with_if_index(
  74                   im,
  75                   vnet_buffer (b)->sw_if_index[VLIB_RX],
  76                   &i->src_address);
  77
  78         dpo = load_balance_get_bucket_i(load_balance_get(lbi), 0);
  79
  80         if (dpo_is_adj(dpo))
  81         {
  82             vnet_buffer (b)->ip.adj_index[VLIB_RX] = dpo->dpoi_index;
  83         }
  84     }
  85     return vnet_buffer (b)->ip.adj_index[VLIB_RX];
  86 }
  87
  88 /**
  89  * \brief Get or create an IPv6 fib.
  90  *
  91  * Get or create an IPv4 fib with the provided table ID.
  92  *
  93  * \param im
  94  *      ip4_main pointer.
  95  * \param table_id
  96  *      When set to \c ~0, an arbitrary and unused fib ID is picked
  97  *      and can be retrieved with \c ret->table_id.
  98  *      Otherwise, the fib ID to be used to retrieve or create the desired fib.
  99  * \returns A pointer to the retrieved or created fib.
 100  *
 101  */
 102 extern u32 ip6_fib_table_find_or_create_and_lock(u32 table_id);
 103 extern u32 ip6_fib_table_create_and_lock(void);
 104
 105 static inline ip6_fib_t *
 106 ip6_fib_get (fib_node_index_t index)
 107 {
 108     ASSERT(!pool_is_free_index(ip6_main.fibs, index));
 109     return (&pool_elt_at_index (ip6_main.fibs, index)->v6);
 110 }
 111
 112 static inline
 113 u32 ip6_fib_index_from_table_id (u32 table_id)
 114 {
 115   ip6_main_t * im = &ip6_main;
 116   uword * p;
 117
 118   p = hash_get (im->fib_index_by_table_id, table_id);
 119   if (!p)
 120     return ~0;
 121
 122   return p[0];
 123 }
 124
 125 extern u32 ip6_fib_table_get_index_for_sw_if_index(u32 sw_if_index);
 126
 127 extern flow_hash_config_t ip6_fib_table_get_flow_hash_config(u32 fib_index);
 128
 129 #endif
 130