src/vnet/fib/fib_entry_delegate.c

   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 #include <vnet/fib/fib_entry_delegate.h>
  17 #include <vnet/fib/fib_entry.h>
  18
  19 static fib_entry_delegate_t *
  20 fib_entry_delegate_find_i (const fib_entry_t *fib_entry,
  21                            fib_entry_delegate_type_t type,
  22                            u32 *index)
  23 {
  24     fib_entry_delegate_t *delegate;
  25     int ii;
  26
  27     ii = 0;
  28     vec_foreach(delegate, fib_entry->fe_delegates)
  29     {
  30         if (delegate->fd_type == type)
  31         {
  32             if (NULL != index)
  33                 *index = ii;
  34
  35             return (delegate);
  36         }
  37         else
  38         {
  39             ii++;
  40         }
  41     }
  42
  43     return (NULL);
  44 }
  45
  46 fib_entry_delegate_t *
  47 fib_entry_delegate_get (const fib_entry_t *fib_entry,
  48                         fib_entry_delegate_type_t type)
  49 {
  50     return (fib_entry_delegate_find_i(fib_entry, type, NULL));
  51 }
  52
  53 void
  54 fib_entry_delegate_remove (fib_entry_t *fib_entry,
  55                            fib_entry_delegate_type_t type)
  56 {
  57     fib_entry_delegate_t *fed;
  58     u32 index = ~0;
  59
  60     fed = fib_entry_delegate_find_i(fib_entry, type, &index);
  61
  62     ASSERT(NULL != fed);
  63
  64     vec_del1(fib_entry->fe_delegates, index);
  65 }
  66
  67 static int
  68 fib_entry_delegate_cmp_for_sort (void * v1,
  69                                  void * v2)
  70 {
  71     fib_entry_delegate_t *delegate1 = v1, *delegate2 = v2;
  72
  73     return (delegate1->fd_type - delegate2->fd_type);
  74 }
  75
  76 static void
  77 fib_entry_delegate_init (fib_entry_t *fib_entry,
  78                          fib_entry_delegate_type_t type)
  79
  80 {
  81     fib_entry_delegate_t delegate = {
  82         .fd_entry_index = fib_entry_get_index(fib_entry),
  83         .fd_type = type,
  84     };
  85
  86     vec_add1(fib_entry->fe_delegates, delegate);
  87     vec_sort_with_function(fib_entry->fe_delegates,
  88                            fib_entry_delegate_cmp_for_sort);
  89 }
  90
  91 fib_entry_delegate_t *
  92 fib_entry_delegate_find_or_add (fib_entry_t *fib_entry,
  93                                 fib_entry_delegate_type_t fdt)
  94 {
  95     fib_entry_delegate_t *delegate;
  96
  97     delegate = fib_entry_delegate_get(fib_entry, fdt);
  98
  99     if (NULL == delegate)
 100     {
 101         fib_entry_delegate_init(fib_entry, fdt);
 102     }
 103
 104     return (fib_entry_delegate_get(fib_entry, fdt));
 105 }
 106
 107 fib_entry_delegate_type_t
 108 fib_entry_chain_type_to_delegate_type (fib_forward_chain_type_t fct)
 109 {
 110     switch (fct)
 111     {
 112     case FIB_FORW_CHAIN_TYPE_UNICAST_IP4:
 113         return (FIB_ENTRY_DELEGATE_CHAIN_UNICAST_IP4);
 114     case FIB_FORW_CHAIN_TYPE_UNICAST_IP6:
 115         return (FIB_ENTRY_DELEGATE_CHAIN_UNICAST_IP6);
 116     case FIB_FORW_CHAIN_TYPE_MPLS_EOS:
 117         return (FIB_ENTRY_DELEGATE_CHAIN_MPLS_EOS);
 118     case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS:
 119         return (FIB_ENTRY_DELEGATE_CHAIN_MPLS_NON_EOS);
 120     case FIB_FORW_CHAIN_TYPE_ETHERNET:
 121         return (FIB_ENTRY_DELEGATE_CHAIN_ETHERNET);
 122     }
 123     ASSERT(0);
 124     return (FIB_ENTRY_DELEGATE_CHAIN_UNICAST_IP4);
 125 }
 126
 127 fib_forward_chain_type_t
 128 fib_entry_delegate_type_to_chain_type (fib_entry_delegate_type_t fdt)
 129 {
 130     switch (fdt)
 131     {
 132     case FIB_ENTRY_DELEGATE_CHAIN_UNICAST_IP4:
 133         return (FIB_FORW_CHAIN_TYPE_UNICAST_IP4);
 134     case FIB_ENTRY_DELEGATE_CHAIN_UNICAST_IP6:
 135         return (FIB_FORW_CHAIN_TYPE_UNICAST_IP6);
 136     case FIB_ENTRY_DELEGATE_CHAIN_MPLS_EOS:
 137         return (FIB_FORW_CHAIN_TYPE_MPLS_EOS);
 138     case FIB_ENTRY_DELEGATE_CHAIN_MPLS_NON_EOS:
 139         return (FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS);
 140     case FIB_ENTRY_DELEGATE_CHAIN_ETHERNET:
 141         return (FIB_FORW_CHAIN_TYPE_ETHERNET);
 142     case FIB_ENTRY_DELEGATE_COVERED:
 143     case FIB_ENTRY_DELEGATE_ATTACHED_IMPORT:
 144     case FIB_ENTRY_DELEGATE_ATTACHED_EXPORT:
 145         break;
 146     }
 147     ASSERT(0);
 148     return (FIB_FORW_CHAIN_TYPE_UNICAST_IP4);
 149 }