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7f57883e DS |
1 | /* |
2 | * EIGRP Interface Functions. | |
3 | * Copyright (C) 2013-2016 | |
4 | * Authors: | |
5 | * Donnie Savage | |
6 | * Jan Janovic | |
7 | * Matej Perina | |
8 | * Peter Orsag | |
9 | * Peter Paluch | |
10 | * Frantisek Gazo | |
11 | * Tomas Hvorkovy | |
12 | * Martin Kontsek | |
13 | * Lukas Koribsky | |
14 | * | |
15 | * This file is part of GNU Zebra. | |
16 | * | |
17 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
18 | * under the terms of the GNU General Public License as published by the | |
19 | * Free Software Foundation; either version 2, or (at your option) any | |
20 | * later version. | |
21 | * | |
22 | * GNU Zebra is distributed in the hope that it will be useful, but | |
23 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
25 | * General Public License for more details. | |
26 | * | |
896014f4 DL |
27 | * You should have received a copy of the GNU General Public License along |
28 | * with this program; see the file COPYING; if not, write to the Free Software | |
29 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
7f57883e DS |
30 | */ |
31 | ||
32 | #include <zebra.h> | |
33 | ||
34 | #include "thread.h" | |
35 | #include "linklist.h" | |
36 | #include "prefix.h" | |
37 | #include "if.h" | |
38 | #include "table.h" | |
39 | #include "memory.h" | |
40 | #include "command.h" | |
41 | #include "stream.h" | |
42 | #include "log.h" | |
43 | #include "keychain.h" | |
44 | #include "vrf.h" | |
45 | ||
46 | #include "eigrpd/eigrp_structs.h" | |
47 | #include "eigrpd/eigrpd.h" | |
48 | #include "eigrpd/eigrp_interface.h" | |
49 | #include "eigrpd/eigrp_neighbor.h" | |
50 | #include "eigrpd/eigrp_packet.h" | |
51 | #include "eigrpd/eigrp_zebra.h" | |
52 | #include "eigrpd/eigrp_vty.h" | |
53 | #include "eigrpd/eigrp_network.h" | |
54 | #include "eigrpd/eigrp_topology.h" | |
55 | #include "eigrpd/eigrp_memory.h" | |
348addb4 | 56 | #include "eigrpd/eigrp_fsm.h" |
7f57883e | 57 | |
d62a17ae | 58 | static void eigrp_delete_from_if(struct interface *, struct eigrp_interface *); |
7f57883e | 59 | |
d62a17ae | 60 | static void eigrp_add_to_if(struct interface *ifp, struct eigrp_interface *ei) |
7f57883e | 61 | { |
d62a17ae | 62 | struct route_node *rn; |
63 | struct prefix p; | |
64 | ||
65 | p = *ei->address; | |
66 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
67 | ||
68 | rn = route_node_get(IF_OIFS(ifp), &p); | |
69 | /* rn->info should either be NULL or equal to this ei | |
70 | * as route_node_get may return an existing node | |
71 | */ | |
72 | assert(!rn->info || rn->info == ei); | |
73 | rn->info = ei; | |
7f57883e DS |
74 | } |
75 | ||
d62a17ae | 76 | struct eigrp_interface *eigrp_if_new(struct eigrp *eigrp, struct interface *ifp, |
77 | struct prefix *p) | |
7f57883e | 78 | { |
d62a17ae | 79 | struct eigrp_interface *ei; |
80 | int i; | |
7f57883e | 81 | |
d62a17ae | 82 | if ((ei = eigrp_if_table_lookup(ifp, p)) == NULL) { |
83 | ei = XCALLOC(MTYPE_EIGRP_IF, sizeof(struct eigrp_interface)); | |
84 | memset(ei, 0, sizeof(struct eigrp_interface)); | |
85 | } else | |
86 | return ei; | |
7f57883e | 87 | |
d62a17ae | 88 | /* Set zebra interface pointer. */ |
89 | ei->ifp = ifp; | |
90 | ei->address = p; | |
7f57883e | 91 | |
d62a17ae | 92 | eigrp_add_to_if(ifp, ei); |
93 | listnode_add(eigrp->eiflist, ei); | |
7f57883e | 94 | |
d62a17ae | 95 | ei->type = EIGRP_IFTYPE_BROADCAST; |
7f57883e | 96 | |
d62a17ae | 97 | /* Initialize neighbor list. */ |
98 | ei->nbrs = list_new(); | |
7f57883e | 99 | |
d62a17ae | 100 | ei->crypt_seqnum = time(NULL); |
7f57883e | 101 | |
d62a17ae | 102 | /* Initialize lists */ |
103 | for (i = 0; i < EIGRP_FILTER_MAX; i++) { | |
104 | ei->list[i] = NULL; | |
105 | ei->prefix[i] = NULL; | |
106 | ei->routemap[i] = NULL; | |
107 | } | |
7f57883e | 108 | |
d62a17ae | 109 | return ei; |
7f57883e DS |
110 | } |
111 | ||
112 | /* lookup ei for specified prefix/ifp */ | |
d62a17ae | 113 | struct eigrp_interface *eigrp_if_table_lookup(struct interface *ifp, |
114 | struct prefix *prefix) | |
7f57883e | 115 | { |
d62a17ae | 116 | struct prefix p; |
117 | struct route_node *rn; | |
118 | struct eigrp_interface *rninfo = NULL; | |
7f57883e | 119 | |
d62a17ae | 120 | p = *prefix; |
121 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
7f57883e | 122 | |
d62a17ae | 123 | /* route_node_get implicitly locks */ |
124 | if ((rn = route_node_lookup(IF_OIFS(ifp), &p))) { | |
125 | rninfo = (struct eigrp_interface *)rn->info; | |
126 | route_unlock_node(rn); | |
127 | } | |
7f57883e | 128 | |
d62a17ae | 129 | return rninfo; |
7f57883e DS |
130 | } |
131 | ||
d62a17ae | 132 | int eigrp_if_delete_hook(struct interface *ifp) |
7f57883e | 133 | { |
d62a17ae | 134 | struct route_node *rn; |
7f57883e | 135 | |
d62a17ae | 136 | route_table_finish(IF_OIFS(ifp)); |
7f57883e | 137 | |
d62a17ae | 138 | for (rn = route_top(IF_OIFS_PARAMS(ifp)); rn; rn = route_next(rn)) |
139 | if (rn->info) | |
140 | eigrp_del_if_params(rn->info); | |
141 | route_table_finish(IF_OIFS_PARAMS(ifp)); | |
7f57883e | 142 | |
d62a17ae | 143 | XFREE(MTYPE_EIGRP_IF_INFO, ifp->info); |
144 | ifp->info = NULL; | |
7f57883e | 145 | |
d62a17ae | 146 | return 0; |
7f57883e DS |
147 | } |
148 | ||
149 | struct list *eigrp_iflist; | |
150 | ||
d62a17ae | 151 | void eigrp_if_init() |
7f57883e | 152 | { |
d62a17ae | 153 | /* Initialize Zebra interface data structure. */ |
ce19a04a DL |
154 | hook_register_prio(if_add, 0, eigrp_if_new_hook); |
155 | hook_register_prio(if_del, 0, eigrp_if_delete_hook); | |
7f57883e DS |
156 | } |
157 | ||
d62a17ae | 158 | int eigrp_if_new_hook(struct interface *ifp) |
7f57883e | 159 | { |
d62a17ae | 160 | int rc = 0; |
7f57883e | 161 | |
d62a17ae | 162 | ifp->info = XCALLOC(MTYPE_EIGRP_IF_INFO, sizeof(struct eigrp_if_info)); |
7f57883e | 163 | |
d62a17ae | 164 | IF_OIFS(ifp) = route_table_init(); |
165 | IF_OIFS_PARAMS(ifp) = route_table_init(); | |
7f57883e | 166 | |
d62a17ae | 167 | IF_DEF_PARAMS(ifp) = eigrp_new_if_params(); |
7f57883e | 168 | |
d62a17ae | 169 | SET_IF_PARAM(IF_DEF_PARAMS(ifp), v_hello); |
170 | IF_DEF_PARAMS(ifp)->v_hello = (u_int32_t)EIGRP_HELLO_INTERVAL_DEFAULT; | |
7f57883e | 171 | |
d62a17ae | 172 | SET_IF_PARAM(IF_DEF_PARAMS(ifp), v_wait); |
173 | IF_DEF_PARAMS(ifp)->v_wait = (u_int16_t)EIGRP_HOLD_INTERVAL_DEFAULT; | |
7f57883e | 174 | |
d62a17ae | 175 | SET_IF_PARAM(IF_DEF_PARAMS(ifp), bandwidth); |
176 | IF_DEF_PARAMS(ifp)->bandwidth = (u_int32_t)EIGRP_BANDWIDTH_DEFAULT; | |
7f57883e | 177 | |
d62a17ae | 178 | SET_IF_PARAM(IF_DEF_PARAMS(ifp), delay); |
179 | IF_DEF_PARAMS(ifp)->delay = (u_int32_t)EIGRP_DELAY_DEFAULT; | |
7f57883e | 180 | |
d62a17ae | 181 | SET_IF_PARAM(IF_DEF_PARAMS(ifp), reliability); |
182 | IF_DEF_PARAMS(ifp)->reliability = (u_char)EIGRP_RELIABILITY_DEFAULT; | |
7f57883e | 183 | |
d62a17ae | 184 | SET_IF_PARAM(IF_DEF_PARAMS(ifp), load); |
185 | IF_DEF_PARAMS(ifp)->load = (u_char)EIGRP_LOAD_DEFAULT; | |
7f57883e | 186 | |
d62a17ae | 187 | SET_IF_PARAM(IF_DEF_PARAMS(ifp), auth_type); |
188 | IF_DEF_PARAMS(ifp)->auth_type = EIGRP_AUTH_TYPE_NONE; | |
7f57883e | 189 | |
d62a17ae | 190 | SET_IF_PARAM(IF_DEF_PARAMS(ifp), auth_keychain); |
191 | IF_DEF_PARAMS(ifp)->auth_keychain = NULL; | |
7f57883e | 192 | |
d62a17ae | 193 | return rc; |
7f57883e DS |
194 | } |
195 | ||
d62a17ae | 196 | struct eigrp_if_params *eigrp_new_if_params(void) |
7f57883e | 197 | { |
d62a17ae | 198 | struct eigrp_if_params *eip; |
199 | ||
200 | eip = XCALLOC(MTYPE_EIGRP_IF_PARAMS, sizeof(struct eigrp_if_params)); | |
201 | if (!eip) | |
202 | return NULL; | |
203 | ||
204 | UNSET_IF_PARAM(eip, passive_interface); | |
205 | UNSET_IF_PARAM(eip, v_hello); | |
206 | UNSET_IF_PARAM(eip, v_wait); | |
207 | UNSET_IF_PARAM(eip, bandwidth); | |
208 | UNSET_IF_PARAM(eip, delay); | |
209 | UNSET_IF_PARAM(eip, reliability); | |
210 | UNSET_IF_PARAM(eip, load); | |
211 | UNSET_IF_PARAM(eip, auth_keychain); | |
212 | UNSET_IF_PARAM(eip, auth_type); | |
213 | ||
214 | return eip; | |
7f57883e DS |
215 | } |
216 | ||
d62a17ae | 217 | void eigrp_del_if_params(struct eigrp_if_params *eip) |
7f57883e | 218 | { |
d62a17ae | 219 | if (eip->auth_keychain) |
220 | free(eip->auth_keychain); | |
7f57883e | 221 | |
d62a17ae | 222 | XFREE(MTYPE_EIGRP_IF_PARAMS, eip); |
7f57883e DS |
223 | } |
224 | ||
d62a17ae | 225 | struct eigrp_if_params *eigrp_lookup_if_params(struct interface *ifp, |
226 | struct in_addr addr) | |
7f57883e | 227 | { |
d62a17ae | 228 | struct prefix_ipv4 p; |
229 | struct route_node *rn; | |
7f57883e | 230 | |
d62a17ae | 231 | p.family = AF_INET; |
232 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
233 | p.prefix = addr; | |
7f57883e | 234 | |
d62a17ae | 235 | rn = route_node_lookup(IF_OIFS_PARAMS(ifp), (struct prefix *)&p); |
7f57883e | 236 | |
d62a17ae | 237 | if (rn) { |
238 | route_unlock_node(rn); | |
239 | return rn->info; | |
240 | } | |
7f57883e | 241 | |
d62a17ae | 242 | return NULL; |
7f57883e DS |
243 | } |
244 | ||
d62a17ae | 245 | int eigrp_if_up(struct eigrp_interface *ei) |
7f57883e | 246 | { |
d62a17ae | 247 | struct eigrp_prefix_entry *pe; |
248 | struct eigrp_neighbor_entry *ne; | |
249 | struct eigrp_metrics metric; | |
250 | struct eigrp_interface *ei2; | |
251 | struct listnode *node, *nnode; | |
252 | struct eigrp *eigrp = eigrp_lookup(); | |
253 | ||
254 | if (ei == NULL) | |
255 | return 0; | |
256 | ||
257 | if (eigrp != NULL) | |
258 | eigrp_adjust_sndbuflen(eigrp, ei->ifp->mtu); | |
259 | else | |
260 | zlog_warn("%s: eigrp_lookup () returned NULL", __func__); | |
261 | eigrp_if_stream_set(ei); | |
262 | ||
263 | /* Set multicast memberships appropriately for new state. */ | |
264 | eigrp_if_set_multicast(ei); | |
265 | ||
266 | thread_add_event(master, eigrp_hello_timer, ei, (1), NULL); | |
267 | ||
268 | /*Prepare metrics*/ | |
b1968f83 | 269 | metric.bandwidth = |
d62a17ae | 270 | eigrp_bandwidth_to_scaled(EIGRP_IF_PARAM(ei, bandwidth)); |
271 | metric.delay = eigrp_delay_to_scaled(EIGRP_IF_PARAM(ei, delay)); | |
272 | metric.load = EIGRP_IF_PARAM(ei, load); | |
273 | metric.reliability = EIGRP_IF_PARAM(ei, reliability); | |
274 | metric.mtu[0] = 0xDC; | |
275 | metric.mtu[1] = 0x05; | |
276 | metric.mtu[2] = 0x00; | |
277 | metric.hop_count = 0; | |
278 | metric.flags = 0; | |
279 | metric.tag = 0; | |
280 | ||
281 | /*Add connected entry to topology table*/ | |
282 | ||
348addb4 DS |
283 | ne = eigrp_neighbor_entry_new(); |
284 | ne->ei = ei; | |
285 | ne->reported_metric = metric; | |
286 | ne->total_metric = metric; | |
287 | ne->distance = eigrp_calculate_metrics(eigrp, metric); | |
288 | ne->reported_distance = 0; | |
289 | ne->adv_router = eigrp->neighbor_self; | |
290 | ne->flags = EIGRP_NEIGHBOR_ENTRY_SUCCESSOR_FLAG; | |
291 | ||
02b45998 | 292 | struct prefix dest_addr; |
d62a17ae | 293 | |
294 | dest_addr.family = AF_INET; | |
02b45998 | 295 | dest_addr.u.prefix4 = ei->connected->address->u.prefix4; |
d62a17ae | 296 | dest_addr.prefixlen = ei->connected->address->prefixlen; |
02b45998 | 297 | apply_mask(&dest_addr); |
d62a17ae | 298 | pe = eigrp_topology_table_lookup_ipv4(eigrp->topology_table, |
476a1469 | 299 | &dest_addr); |
d62a17ae | 300 | |
301 | if (pe == NULL) { | |
302 | pe = eigrp_prefix_entry_new(); | |
303 | pe->serno = eigrp->serno; | |
02b45998 DS |
304 | pe->destination = (struct prefix *)prefix_ipv4_new(); |
305 | prefix_copy(pe->destination, &dest_addr); | |
d62a17ae | 306 | pe->af = AF_INET; |
307 | pe->nt = EIGRP_TOPOLOGY_TYPE_CONNECTED; | |
308 | ||
348addb4 | 309 | ne->prefix = pe; |
d62a17ae | 310 | pe->state = EIGRP_FSM_STATE_PASSIVE; |
311 | pe->fdistance = eigrp_calculate_metrics(eigrp, metric); | |
312 | pe->req_action |= EIGRP_FSM_NEED_UPDATE; | |
313 | eigrp_prefix_entry_add(eigrp->topology_table, pe); | |
314 | listnode_add(eigrp->topology_changes_internalIPV4, pe); | |
d62a17ae | 315 | |
348addb4 | 316 | eigrp_neighbor_entry_add(pe, ne); |
d62a17ae | 317 | |
348addb4 DS |
318 | for (ALL_LIST_ELEMENTS(eigrp->eiflist, node, nnode, ei2)) { |
319 | eigrp_update_send(ei2); | |
320 | } | |
321 | ||
322 | pe->req_action &= ~EIGRP_FSM_NEED_UPDATE; | |
323 | listnode_delete(eigrp->topology_changes_internalIPV4, pe); | |
324 | } else { | |
325 | struct eigrp_fsm_action_message msg; | |
326 | ||
327 | ne->prefix = pe; | |
328 | eigrp_neighbor_entry_add(pe, ne); | |
329 | ||
330 | msg.packet_type = EIGRP_OPC_UPDATE; | |
331 | msg.eigrp = eigrp; | |
332 | msg.data_type = EIGRP_CONNECTED; | |
333 | msg.adv_router = NULL; | |
334 | msg.entry = ne; | |
335 | msg.prefix = pe; | |
336 | ||
337 | eigrp_fsm_event(&msg); | |
338 | } | |
d62a17ae | 339 | |
340 | return 1; | |
7f57883e DS |
341 | } |
342 | ||
d62a17ae | 343 | int eigrp_if_down(struct eigrp_interface *ei) |
7f57883e | 344 | { |
d62a17ae | 345 | struct listnode *node, *nnode; |
346 | struct eigrp_neighbor *nbr; | |
7f57883e | 347 | |
d62a17ae | 348 | if (ei == NULL) |
349 | return 0; | |
7f57883e | 350 | |
d62a17ae | 351 | /* Shutdown packet reception and sending */ |
352 | if (ei->t_hello) | |
353 | THREAD_OFF(ei->t_hello); | |
7f57883e | 354 | |
d62a17ae | 355 | eigrp_if_stream_unset(ei); |
7f57883e | 356 | |
d62a17ae | 357 | /*Set infinite metrics to routes learned by this interface and start |
358 | * query process*/ | |
359 | for (ALL_LIST_ELEMENTS(ei->nbrs, node, nnode, nbr)) { | |
360 | eigrp_nbr_delete(nbr); | |
361 | } | |
7f57883e | 362 | |
d62a17ae | 363 | return 1; |
7f57883e DS |
364 | } |
365 | ||
d62a17ae | 366 | void eigrp_if_stream_set(struct eigrp_interface *ei) |
7f57883e | 367 | { |
d62a17ae | 368 | /* set output fifo queue. */ |
369 | if (ei->obuf == NULL) | |
370 | ei->obuf = eigrp_fifo_new(); | |
7f57883e DS |
371 | } |
372 | ||
d62a17ae | 373 | void eigrp_if_stream_unset(struct eigrp_interface *ei) |
7f57883e | 374 | { |
d62a17ae | 375 | struct eigrp *eigrp = ei->eigrp; |
376 | ||
377 | if (ei->obuf) { | |
378 | eigrp_fifo_free(ei->obuf); | |
379 | ei->obuf = NULL; | |
380 | ||
381 | if (ei->on_write_q) { | |
382 | listnode_delete(eigrp->oi_write_q, ei); | |
383 | if (list_isempty(eigrp->oi_write_q)) | |
384 | thread_cancel(eigrp->t_write); | |
385 | ei->on_write_q = 0; | |
386 | } | |
387 | } | |
7f57883e DS |
388 | } |
389 | ||
d62a17ae | 390 | void eigrp_if_set_multicast(struct eigrp_interface *ei) |
7f57883e | 391 | { |
d62a17ae | 392 | if ((EIGRP_IF_PASSIVE_STATUS(ei) == EIGRP_IF_ACTIVE)) { |
393 | /* The interface should belong to the EIGRP-all-routers group. | |
394 | */ | |
395 | if (!EI_MEMBER_CHECK(ei, MEMBER_ALLROUTERS) | |
396 | && (eigrp_if_add_allspfrouters(ei->eigrp, ei->address, | |
397 | ei->ifp->ifindex) | |
398 | >= 0)) | |
399 | /* Set the flag only if the system call to join | |
400 | * succeeded. */ | |
401 | EI_MEMBER_JOINED(ei, MEMBER_ALLROUTERS); | |
402 | } else { | |
403 | /* The interface should NOT belong to the EIGRP-all-routers | |
404 | * group. */ | |
405 | if (EI_MEMBER_CHECK(ei, MEMBER_ALLROUTERS)) { | |
406 | /* Only actually drop if this is the last reference */ | |
407 | if (EI_MEMBER_COUNT(ei, MEMBER_ALLROUTERS) == 1) | |
408 | eigrp_if_drop_allspfrouters(ei->eigrp, | |
409 | ei->address, | |
410 | ei->ifp->ifindex); | |
411 | /* Unset the flag regardless of whether the system call | |
412 | to leave | |
413 | the group succeeded, since it's much safer to assume | |
414 | that | |
415 | we are not a member. */ | |
416 | EI_MEMBER_LEFT(ei, MEMBER_ALLROUTERS); | |
417 | } | |
418 | } | |
7f57883e DS |
419 | } |
420 | ||
d62a17ae | 421 | u_char eigrp_default_iftype(struct interface *ifp) |
7f57883e | 422 | { |
d62a17ae | 423 | if (if_is_pointopoint(ifp)) |
424 | return EIGRP_IFTYPE_POINTOPOINT; | |
425 | else if (if_is_loopback(ifp)) | |
426 | return EIGRP_IFTYPE_LOOPBACK; | |
427 | else | |
428 | return EIGRP_IFTYPE_BROADCAST; | |
7f57883e DS |
429 | } |
430 | ||
d62a17ae | 431 | void eigrp_if_free(struct eigrp_interface *ei, int source) |
7f57883e | 432 | { |
476a1469 | 433 | struct prefix dest_addr; |
d62a17ae | 434 | struct eigrp_prefix_entry *pe; |
435 | struct eigrp *eigrp = eigrp_lookup(); | |
436 | ||
437 | if (source == INTERFACE_DOWN_BY_VTY) { | |
438 | THREAD_OFF(ei->t_hello); | |
439 | eigrp_hello_send(ei, EIGRP_HELLO_GRACEFUL_SHUTDOWN, NULL); | |
440 | } | |
441 | ||
476a1469 DS |
442 | dest_addr = *ei->connected->address; |
443 | apply_mask(&dest_addr); | |
d62a17ae | 444 | pe = eigrp_topology_table_lookup_ipv4(eigrp->topology_table, |
445 | &dest_addr); | |
446 | if (pe) | |
447 | eigrp_prefix_entry_delete(eigrp->topology_table, pe); | |
448 | ||
449 | eigrp_if_down(ei); | |
450 | ||
451 | list_delete(ei->nbrs); | |
452 | eigrp_delete_from_if(ei->ifp, ei); | |
453 | listnode_delete(ei->eigrp->eiflist, ei); | |
454 | ||
455 | thread_cancel_event(master, ei); | |
456 | ||
457 | memset(ei, 0, sizeof(*ei)); | |
458 | XFREE(MTYPE_EIGRP_IF, ei); | |
7f57883e DS |
459 | } |
460 | ||
d62a17ae | 461 | static void eigrp_delete_from_if(struct interface *ifp, |
462 | struct eigrp_interface *ei) | |
7f57883e | 463 | { |
d62a17ae | 464 | struct route_node *rn; |
465 | struct prefix p; | |
466 | ||
467 | p = *ei->address; | |
468 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
469 | ||
470 | rn = route_node_lookup(IF_OIFS(ei->ifp), &p); | |
471 | assert(rn); | |
472 | assert(rn->info); | |
473 | rn->info = NULL; | |
474 | route_unlock_node(rn); | |
475 | route_unlock_node(rn); | |
7f57883e DS |
476 | } |
477 | ||
478 | /* Simulate down/up on the interface. This is needed, for example, when | |
f9e5c9ca | 479 | the MTU changes. */ |
d62a17ae | 480 | void eigrp_if_reset(struct interface *ifp) |
7f57883e | 481 | { |
d62a17ae | 482 | struct route_node *rn; |
7f57883e | 483 | |
d62a17ae | 484 | for (rn = route_top(IF_OIFS(ifp)); rn; rn = route_next(rn)) { |
485 | struct eigrp_interface *ei; | |
7f57883e | 486 | |
d62a17ae | 487 | if ((ei = rn->info) == NULL) |
488 | continue; | |
7f57883e | 489 | |
d62a17ae | 490 | eigrp_if_down(ei); |
491 | eigrp_if_up(ei); | |
492 | } | |
7f57883e DS |
493 | } |
494 | ||
d62a17ae | 495 | struct eigrp_interface *eigrp_if_lookup_by_local_addr(struct eigrp *eigrp, |
496 | struct interface *ifp, | |
497 | struct in_addr address) | |
7f57883e | 498 | { |
d62a17ae | 499 | struct listnode *node; |
500 | struct eigrp_interface *ei; | |
7f57883e | 501 | |
d62a17ae | 502 | for (ALL_LIST_ELEMENTS_RO(eigrp->eiflist, node, ei)) { |
503 | if (ifp && ei->ifp != ifp) | |
504 | continue; | |
7f57883e | 505 | |
d62a17ae | 506 | if (IPV4_ADDR_SAME(&address, &ei->address->u.prefix4)) |
507 | return ei; | |
508 | } | |
7f57883e | 509 | |
d62a17ae | 510 | return NULL; |
7f57883e DS |
511 | } |
512 | ||
513 | /** | |
514 | * @fn eigrp_if_lookup_by_name | |
515 | * | |
516 | * @param[in] eigrp EIGRP process | |
517 | * @param[in] if_name Name of the interface | |
518 | * | |
519 | * @return struct eigrp_interface * | |
520 | * | |
521 | * @par | |
522 | * Function is used for lookup interface by name. | |
523 | */ | |
d62a17ae | 524 | struct eigrp_interface *eigrp_if_lookup_by_name(struct eigrp *eigrp, |
525 | const char *if_name) | |
7f57883e | 526 | { |
d62a17ae | 527 | struct eigrp_interface *ei; |
528 | struct listnode *node; | |
529 | ||
530 | /* iterate over all eigrp interfaces */ | |
531 | for (ALL_LIST_ELEMENTS_RO(eigrp->eiflist, node, ei)) { | |
532 | /* compare int name with eigrp interface's name */ | |
533 | if (strcmp(ei->ifp->name, if_name) == 0) { | |
534 | return ei; | |
535 | } | |
536 | } | |
537 | ||
538 | return NULL; | |
7f57883e DS |
539 | } |
540 | ||
541 | /* determine receiving interface by ifp and source address */ | |
d62a17ae | 542 | struct eigrp_interface *eigrp_if_lookup_recv_if(struct eigrp *eigrp, |
543 | struct in_addr src, | |
544 | struct interface *ifp) | |
7f57883e | 545 | { |
d62a17ae | 546 | struct route_node *rn; |
547 | struct prefix_ipv4 addr; | |
548 | struct eigrp_interface *ei, *match; | |
7f57883e | 549 | |
d62a17ae | 550 | addr.family = AF_INET; |
551 | addr.prefix = src; | |
552 | addr.prefixlen = IPV4_MAX_BITLEN; | |
7f57883e | 553 | |
d62a17ae | 554 | match = NULL; |
7f57883e | 555 | |
d62a17ae | 556 | for (rn = route_top(IF_OIFS(ifp)); rn; rn = route_next(rn)) { |
557 | ei = rn->info; | |
7f57883e | 558 | |
d62a17ae | 559 | if (!ei) /* oi can be NULL for PtP aliases */ |
560 | continue; | |
7f57883e | 561 | |
d62a17ae | 562 | if (if_is_loopback(ei->ifp)) |
563 | continue; | |
7f57883e | 564 | |
d62a17ae | 565 | if (prefix_match(CONNECTED_PREFIX(ei->connected), |
566 | (struct prefix *)&addr)) { | |
9d303b37 DL |
567 | if ((match == NULL) || (match->address->prefixlen |
568 | < ei->address->prefixlen)) | |
d62a17ae | 569 | match = ei; |
570 | } | |
571 | } | |
7f57883e | 572 | |
d62a17ae | 573 | return match; |
7f57883e DS |
574 | } |
575 | ||
d62a17ae | 576 | u_int32_t eigrp_bandwidth_to_scaled(u_int32_t bandwidth) |
7f57883e | 577 | { |
d62a17ae | 578 | uint64_t temp_bandwidth = (256ull * 10000000) / bandwidth; |
7f57883e | 579 | |
d62a17ae | 580 | temp_bandwidth = temp_bandwidth < EIGRP_MAX_METRIC ? temp_bandwidth |
581 | : EIGRP_MAX_METRIC; | |
7f57883e | 582 | |
d62a17ae | 583 | return (u_int32_t)temp_bandwidth; |
7f57883e DS |
584 | } |
585 | ||
d62a17ae | 586 | u_int32_t eigrp_scaled_to_bandwidth(u_int32_t scaled) |
7f57883e | 587 | { |
d62a17ae | 588 | uint64_t temp_scaled = scaled * (256ull * 10000000); |
7f57883e | 589 | |
d62a17ae | 590 | temp_scaled = |
591 | temp_scaled < EIGRP_MAX_METRIC ? temp_scaled : EIGRP_MAX_METRIC; | |
7f57883e | 592 | |
d62a17ae | 593 | return (u_int32_t)temp_scaled; |
7f57883e DS |
594 | } |
595 | ||
d62a17ae | 596 | u_int32_t eigrp_delay_to_scaled(u_int32_t delay) |
7f57883e | 597 | { |
d62a17ae | 598 | return delay * 256; |
7f57883e DS |
599 | } |
600 | ||
d62a17ae | 601 | u_int32_t eigrp_scaled_to_delay(u_int32_t scaled) |
7f57883e | 602 | { |
d62a17ae | 603 | return scaled / 256; |
7f57883e | 604 | } |