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;
54 fib_entry_src_interface_path_swap (fib_entry_src_t *src,
55 const fib_entry_t *entry,
56 fib_path_list_flags_t pl_flags,
57 const fib_route_path_t *paths)
61 src->fes_pl = fib_path_list_create(pl_flags, paths);
64 * this is a hack to get the entry's prefix into the glean adjacnecy
65 * so that it is available for fast retreival in the switch path.
67 if (!(FIB_ENTRY_FLAG_LOCAL & src->fes_entry_flags))
69 adj = adj_get(fib_path_list_get_adj(
71 fib_entry_get_default_chain_type(entry)));
73 if (IP_LOOKUP_NEXT_GLEAN == adj->lookup_next_index)
76 * the connected prefix will link to a glean on a non-p2p
79 adj->sub_type.glean.receive_addr = entry->fe_prefix.fp_addr;
86 * Called when the source is teh new longer best source on the entry
89 fib_entry_src_interface_activate (fib_entry_src_t *src,
90 const fib_entry_t *fib_entry)
94 if (FIB_ENTRY_FLAG_LOCAL & src->fes_entry_flags)
97 * Track the covering attached/connected cover. This is so that
98 * during an attached export of the cover, this local prefix is
101 src->u.interface.fesi_cover =
102 fib_table_get_less_specific(fib_entry->fe_fib_index,
103 &fib_entry->fe_prefix);
105 ASSERT(FIB_NODE_INDEX_INVALID != src->u.interface.fesi_cover);
107 cover = fib_entry_get(src->u.interface.fesi_cover);
109 src->u.interface.fesi_sibling =
110 fib_entry_cover_track(cover, fib_entry_get_index(fib_entry));
119 * Called when the source is no longer best source on the entry
122 fib_entry_src_interface_deactivate (fib_entry_src_t *src,
123 const fib_entry_t *fib_entry)
128 * remove the depednecy on the covering entry
130 if (FIB_NODE_INDEX_INVALID != src->u.interface.fesi_cover)
132 cover = fib_entry_get(src->u.interface.fesi_cover);
134 fib_entry_cover_untrack(cover, src->u.interface.fesi_sibling);
136 src->u.interface.fesi_cover = FIB_NODE_INDEX_INVALID;
140 static fib_entry_src_cover_res_t
141 fib_entry_src_interface_cover_change (fib_entry_src_t *src,
142 const fib_entry_t *fib_entry)
144 fib_entry_src_cover_res_t res = {
146 .bw_reason = FIB_NODE_BW_REASON_FLAG_NONE,
149 if (FIB_NODE_INDEX_INVALID == src->u.interface.fesi_cover)
152 * not tracking the cover. surprised we got poked?
158 * this function is called when this entry's cover has a more specific
159 * entry inserted benaeth it. That does not necessarily mean that this
160 * entry is covered by the new prefix. check that
162 if (src->u.interface.fesi_cover !=
163 fib_table_get_less_specific(fib_entry->fe_fib_index,
164 &fib_entry->fe_prefix))
166 fib_entry_src_interface_deactivate(src, fib_entry);
167 fib_entry_src_interface_activate(src, fib_entry);
173 fib_entry_src_interface_installed (fib_entry_src_t *src,
174 const fib_entry_t *fib_entry)
177 * The interface source now rules! poke our cover to get exported
181 if (FIB_NODE_INDEX_INVALID != src->u.interface.fesi_cover)
183 cover = fib_entry_get(src->u.interface.fesi_cover);
185 fib_attached_export_covered_added(cover,
186 fib_entry_get_index(fib_entry));
191 fib_entry_src_interface_format (fib_entry_src_t *src,
194 return (format(s, " cover:%d", src->u.interface.fesi_cover));
197 const static fib_entry_src_vft_t interface_src_vft = {
198 .fesv_init = fib_entry_src_interface_init,
199 .fesv_add = fib_entry_src_interface_add,
200 .fesv_remove = fib_entry_src_interface_remove,
201 .fesv_path_swap = fib_entry_src_interface_path_swap,
202 .fesv_activate = fib_entry_src_interface_activate,
203 .fesv_deactivate = fib_entry_src_interface_deactivate,
204 .fesv_format = fib_entry_src_interface_format,
205 .fesv_installed = fib_entry_src_interface_installed,
206 .fesv_cover_change = fib_entry_src_interface_cover_change,
208 * not concerned about updates to the cover. the cover will
209 * decide to export or not
214 fib_entry_src_interface_register (void)
216 fib_entry_src_register(FIB_SOURCE_INTERFACE, &interface_src_vft);