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->interface.fesi_cover = FIB_NODE_INDEX_INVALID;
31 src->interface.fesi_sibling = FIB_NODE_INDEX_INVALID;
35 fib_entry_src_interface_path_swap (fib_entry_src_t *src,
36 const fib_entry_t *entry,
37 fib_path_list_flags_t pl_flags,
38 const fib_route_path_t *paths)
42 src->fes_pl = fib_path_list_create(pl_flags, paths);
45 * this is a hack to get the entry's prefix into the glean adjacnecy
46 * so that it is available for fast retreival in the switch path.
48 if (!(FIB_ENTRY_FLAG_LOCAL & src->fes_entry_flags))
50 adj = adj_get(fib_path_list_get_adj(
52 fib_entry_get_default_chain_type(entry)));
54 if (IP_LOOKUP_NEXT_GLEAN == adj->lookup_next_index)
57 * the connected prefix will link to a glean on a non-p2p
60 adj->sub_type.glean.receive_addr = entry->fe_prefix.fp_addr;
67 * Called when the source is teh new longer best source on the entry
70 fib_entry_src_interface_activate (fib_entry_src_t *src,
71 const fib_entry_t *fib_entry)
75 if (FIB_ENTRY_FLAG_LOCAL & src->fes_entry_flags)
78 * Track the covering attached/connected cover. This is so that
79 * during an attached export of the cover, this local prefix is
82 src->interface.fesi_cover =
83 fib_table_get_less_specific(fib_entry->fe_fib_index,
84 &fib_entry->fe_prefix);
86 ASSERT(FIB_NODE_INDEX_INVALID != src->interface.fesi_cover);
88 cover = fib_entry_get(src->interface.fesi_cover);
90 src->interface.fesi_sibling =
91 fib_entry_cover_track(cover, fib_entry_get_index(fib_entry));
100 * Called when the source is no longer best source on the entry
103 fib_entry_src_interface_deactivate (fib_entry_src_t *src,
104 const fib_entry_t *fib_entry)
109 * remove the depednecy on the covering entry
111 if (FIB_NODE_INDEX_INVALID != src->interface.fesi_cover)
113 cover = fib_entry_get(src->interface.fesi_cover);
115 fib_entry_cover_untrack(cover, src->interface.fesi_sibling);
117 src->interface.fesi_cover = FIB_NODE_INDEX_INVALID;
121 static fib_entry_src_cover_res_t
122 fib_entry_src_interface_cover_change (fib_entry_src_t *src,
123 const fib_entry_t *fib_entry)
125 fib_entry_src_cover_res_t res = {
127 .bw_reason = FIB_NODE_BW_REASON_FLAG_NONE,
130 if (FIB_NODE_INDEX_INVALID == src->interface.fesi_cover)
133 * not tracking the cover. surprised we got poked?
139 * this function is called when this entry's cover has a more specific
140 * entry inserted benaeth it. That does not necessarily mean that this
141 * entry is covered by the new prefix. check that
143 if (src->rr.fesr_cover != fib_table_get_less_specific(fib_entry->fe_fib_index,
144 &fib_entry->fe_prefix))
146 fib_entry_src_interface_deactivate(src, fib_entry);
147 fib_entry_src_interface_activate(src, fib_entry);
153 fib_entry_src_interface_installed (fib_entry_src_t *src,
154 const fib_entry_t *fib_entry)
157 * The interface source now rules! poke our cover to get exported
161 if (FIB_NODE_INDEX_INVALID != src->interface.fesi_cover)
163 cover = fib_entry_get(src->interface.fesi_cover);
165 fib_attached_export_covered_added(cover,
166 fib_entry_get_index(fib_entry));
171 fib_entry_src_interface_format (fib_entry_src_t *src,
174 return (format(s, "cover:%d", src->interface.fesi_cover));
177 const static fib_entry_src_vft_t interface_src_vft = {
178 .fesv_init = fib_entry_src_interface_init,
179 .fesv_path_swap = fib_entry_src_interface_path_swap,
180 .fesv_activate = fib_entry_src_interface_activate,
181 .fesv_deactivate = fib_entry_src_interface_deactivate,
182 .fesv_format = fib_entry_src_interface_format,
183 .fesv_installed = fib_entry_src_interface_installed,
184 .fesv_cover_change = fib_entry_src_interface_cover_change,
186 * not concerned about updates to the cover. the cover will
187 * decide to export or not
192 fib_entry_src_interface_register (void)
194 fib_entry_src_register(FIB_SOURCE_INTERFACE, &interface_src_vft);