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.
16 #include "fib_entry.h"
17 #include "fib_entry_src.h"
18 #include "fib_path_list.h"
19 #include "fib_internal.h"
20 #include "fib_table.h"
21 #include "fib_entry_cover.h"
22 #include "fib_attached_export.h"
25 * Source initialisation Function
28 fib_entry_src_interface_init (fib_entry_src_t *src)
30 src->u.interface.fesi_cover = FIB_NODE_INDEX_INVALID;
31 src->u.interface.fesi_sibling = FIB_NODE_INDEX_INVALID;
35 fib_entry_src_interface_add (fib_entry_src_t *src,
36 const fib_entry_t *entry,
37 fib_entry_flag_t flags,
41 src->fes_pl = fib_path_list_create_special(
43 fib_entry_src_flags_2_path_list_flags(flags),
48 fib_entry_src_interface_remove (fib_entry_src_t *src)
50 src->fes_pl = FIB_NODE_INDEX_INVALID;
51 ASSERT(src->u.interface.fesi_sibling == ~0);
55 fib_entry_src_interface_update_glean (fib_entry_t *cover,
56 const fib_entry_t *local)
61 src = fib_entry_src_find (cover, FIB_SOURCE_INTERFACE);
66 * The cover is not an interface source, no work
71 ai = fib_path_list_get_adj(src->fes_pl,
72 fib_entry_get_default_chain_type(cover));
74 if (INDEX_INVALID != ai)
80 if (IP_LOOKUP_NEXT_GLEAN == adj->lookup_next_index)
83 * the connected prefix will link to a glean on a non-p2p
85 * Ensure we are updating with a host in the connected's subnet
87 if (fib_prefix_is_cover(&adj->sub_type.glean.rx_pfx,
90 adj->sub_type.glean.rx_pfx.fp_addr = local->fe_prefix.fp_addr;
100 fib_entry_src_interface_update_glean_walk (fib_entry_t *cover,
101 fib_node_index_t covered,
104 if (fib_entry_src_interface_update_glean(cover, fib_entry_get(covered)))
107 return (WALK_CONTINUE);
111 fib_entry_src_interface_path_swap (fib_entry_src_t *src,
112 const fib_entry_t *entry,
113 fib_path_list_flags_t pl_flags,
114 const fib_route_path_t *paths)
116 src->fes_pl = fib_path_list_create(pl_flags, paths);
121 * Called when the source is teh new longer best source on the entry
124 fib_entry_src_interface_activate (fib_entry_src_t *src,
125 const fib_entry_t *fib_entry)
129 if (FIB_ENTRY_FLAG_LOCAL & src->fes_entry_flags)
132 * Track the covering attached/connected cover. This is so that
133 * during an attached export of the cover, this local prefix is
136 src->u.interface.fesi_cover =
137 fib_table_get_less_specific(fib_entry->fe_fib_index,
138 &fib_entry->fe_prefix);
140 ASSERT(FIB_NODE_INDEX_INVALID != src->u.interface.fesi_cover);
142 cover = fib_entry_get(src->u.interface.fesi_cover);
144 src->u.interface.fesi_sibling =
145 fib_entry_cover_track(cover, fib_entry_get_index(fib_entry));
147 fib_entry_src_interface_update_glean(cover, fib_entry);
156 * Called when the source is no longer best source on the entry
159 fib_entry_src_interface_deactivate (fib_entry_src_t *src,
160 const fib_entry_t *fib_entry)
165 * remove the dependency on the covering entry
167 if (FIB_NODE_INDEX_INVALID != src->u.interface.fesi_cover)
169 cover = fib_entry_get(src->u.interface.fesi_cover);
171 fib_entry_cover_untrack(cover, src->u.interface.fesi_sibling);
173 src->u.interface.fesi_cover = FIB_NODE_INDEX_INVALID;
174 src->u.interface.fesi_sibling = ~0;
176 fib_entry_cover_walk(cover,
177 fib_entry_src_interface_update_glean_walk,
182 static fib_entry_src_cover_res_t
183 fib_entry_src_interface_cover_change (fib_entry_src_t *src,
184 const fib_entry_t *fib_entry)
186 fib_entry_src_cover_res_t res = {
188 .bw_reason = FIB_NODE_BW_REASON_FLAG_NONE,
191 if (FIB_NODE_INDEX_INVALID == src->u.interface.fesi_cover)
194 * not tracking the cover. surprised we got poked?
200 * this function is called when this entry's cover has a more specific
201 * entry inserted benaeth it. That does not necessarily mean that this
202 * entry is covered by the new prefix. check that
204 if (src->u.interface.fesi_cover !=
205 fib_table_get_less_specific(fib_entry->fe_fib_index,
206 &fib_entry->fe_prefix))
208 fib_entry_src_interface_deactivate(src, fib_entry);
209 fib_entry_src_interface_activate(src, fib_entry);
215 fib_entry_src_interface_installed (fib_entry_src_t *src,
216 const fib_entry_t *fib_entry)
219 * The interface source now rules! poke our cover to get exported
223 if (FIB_NODE_INDEX_INVALID != src->u.interface.fesi_cover)
225 cover = fib_entry_get(src->u.interface.fesi_cover);
227 fib_attached_export_covered_added(cover,
228 fib_entry_get_index(fib_entry));
233 fib_entry_src_interface_format (fib_entry_src_t *src,
236 return (format(s, " cover:%d", src->u.interface.fesi_cover));
239 const static fib_entry_src_vft_t interface_src_vft = {
240 .fesv_init = fib_entry_src_interface_init,
241 .fesv_add = fib_entry_src_interface_add,
242 .fesv_remove = fib_entry_src_interface_remove,
243 .fesv_path_swap = fib_entry_src_interface_path_swap,
244 .fesv_activate = fib_entry_src_interface_activate,
245 .fesv_deactivate = fib_entry_src_interface_deactivate,
246 .fesv_format = fib_entry_src_interface_format,
247 .fesv_installed = fib_entry_src_interface_installed,
248 .fesv_cover_change = fib_entry_src_interface_cover_change,
250 * not concerned about updates to the cover. the cover will
251 * decide to export or not
256 fib_entry_src_interface_register (void)
258 fib_entry_src_behaviour_register(FIB_SOURCE_BH_INTERFACE,