src/vnet/fib/fib_entry_src_api.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.h>
  17 #include <vnet/fib/fib_entry_src.h>
  18 #include <vnet/fib/fib_path_list.h>
  19 #include <vnet/fib/fib_path_ext.h>
  20
  21 /**
  22  * Source initialisation Function
  23  */
  24 static void
  25 fib_entry_src_api_init (fib_entry_src_t *src)
  26 {
  27 }
  28
  29 /**
  30  * Source deinitialisation Function
  31  */
  32 static void
  33 fib_entry_src_api_deinit (fib_entry_src_t *src)
  34 {
  35 }
  36
  37 static void
  38 fib_entry_src_api_path_swap (fib_entry_src_t *src,
  39                              const fib_entry_t *entry,
  40                              fib_path_list_flags_t pl_flags,
  41                              const fib_route_path_t *rpaths)
  42 {
  43     const fib_route_path_t *rpath;
  44
  45     fib_path_ext_list_flush(&src->fes_path_exts);
  46
  47     src->fes_pl = fib_path_list_create((FIB_PATH_LIST_FLAG_SHARED | pl_flags),
  48                                        rpaths);
  49
  50     vec_foreach(rpath, rpaths)
  51     {
  52         if (NULL != rpath->frp_label_stack)
  53         {
  54             fib_path_ext_list_push_back(&src->fes_path_exts,
  55                                         src->fes_pl,
  56                                         FIB_PATH_EXT_MPLS,
  57                                         rpath);
  58         }
  59     }
  60 }
  61
  62 static void
  63 fib_entry_src_api_path_add (fib_entry_src_t *src,
  64                             const fib_entry_t *entry,
  65                             fib_path_list_flags_t pl_flags,
  66                             const fib_route_path_t *rpaths)
  67 {
  68     const fib_route_path_t *rpath;
  69
  70     if (FIB_NODE_INDEX_INVALID == src->fes_pl)
  71     {
  72         src->fes_pl =
  73             fib_path_list_create((FIB_PATH_LIST_FLAG_SHARED | pl_flags), rpaths);
  74     }
  75     else
  76     {
  77         src->fes_pl =
  78             fib_path_list_copy_and_path_add(src->fes_pl,
  79                                             (FIB_PATH_LIST_FLAG_SHARED | pl_flags),
  80                                             rpaths);
  81     }
  82
  83     /*
  84      * re-resolve all the path-extensions with the new path-list
  85      */
  86     fib_path_ext_list_resolve(&src->fes_path_exts, src->fes_pl);
  87
  88     /*
  89      * if the path has a label we need to add a path extension
  90      */
  91     vec_foreach(rpath, rpaths)
  92     {
  93         if (NULL != rpath->frp_label_stack)
  94         {
  95             fib_path_ext_list_insert(&src->fes_path_exts,
  96                                      src->fes_pl,
  97                                      FIB_PATH_EXT_MPLS,
  98                                      rpath);
  99         }
 100     }
 101 }
 102
 103 static void
 104 fib_entry_src_api_path_remove (fib_entry_src_t *src,
 105                                fib_path_list_flags_t pl_flags,
 106                                const fib_route_path_t *rpaths)
 107 {
 108     const fib_route_path_t *rpath;
 109
 110     if (FIB_NODE_INDEX_INVALID != src->fes_pl)
 111     {
 112         src->fes_pl =
 113             fib_path_list_copy_and_path_remove(src->fes_pl,
 114                                                (FIB_PATH_LIST_FLAG_SHARED | pl_flags),
 115                                                rpaths);
 116         /*
 117          * remove the path-extension for the path
 118          */
 119         vec_foreach(rpath, rpaths)
 120         {
 121             fib_path_ext_list_remove(&src->fes_path_exts, FIB_PATH_EXT_MPLS, rpath);
 122         };
 123         /*
 124          * resolve the remaining extensions
 125          */
 126         fib_path_ext_list_resolve(&src->fes_path_exts, src->fes_pl);
 127     }
 128 }
 129
 130 static void
 131 fib_entry_src_api_add (fib_entry_src_t *src,
 132                        const fib_entry_t *entry,
 133                        fib_entry_flag_t flags,
 134                        dpo_proto_t proto,
 135                        const dpo_id_t *dpo)
 136 {
 137     if (FIB_ENTRY_FLAG_NONE != flags)
 138     {
 139         src->fes_pl = fib_path_list_create_special(
 140                           proto,
 141                           fib_entry_src_flags_2_path_list_flags(flags),
 142                           dpo);
 143     }
 144 }
 145
 146 static void
 147 fib_entry_src_api_remove (fib_entry_src_t *src)
 148 {
 149     src->fes_pl = FIB_NODE_INDEX_INVALID;
 150 }
 151
 152 const static fib_entry_src_vft_t api_src_vft = {
 153     .fesv_init = fib_entry_src_api_init,
 154     .fesv_deinit = fib_entry_src_api_deinit,
 155     .fesv_add = fib_entry_src_api_add,
 156     .fesv_remove = fib_entry_src_api_remove,
 157     .fesv_path_add = fib_entry_src_api_path_add,
 158     .fesv_path_swap = fib_entry_src_api_path_swap,
 159     .fesv_path_remove = fib_entry_src_api_path_remove,
 160 };
 161
 162 void
 163 fib_entry_src_api_register (void)
 164 {
 165     fib_entry_src_register(FIB_SOURCE_PLUGIN_HI, &api_src_vft);
 166     fib_entry_src_register(FIB_SOURCE_PLUGIN_LOW, &api_src_vft);
 167     fib_entry_src_register(FIB_SOURCE_API, &api_src_vft);
 168     fib_entry_src_register(FIB_SOURCE_CLI, &api_src_vft);
 169     fib_entry_src_register(FIB_SOURCE_6RD, &api_src_vft);
 170     fib_entry_src_register(FIB_SOURCE_DHCP, &api_src_vft);
 171     fib_entry_src_register(FIB_SOURCE_IP6_ND_PROXY, &api_src_vft);
 172     fib_entry_src_register(FIB_SOURCE_IP6_ND, &api_src_vft);
 173     fib_entry_src_register(FIB_SOURCE_SR, &api_src_vft);
 174 }