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1 | /* | |
2 | * IS-IS Rout(e)ing protocol - isis_zebra.c | |
3 | * | |
4 | * Copyright (C) 2001,2002 Sampo Saaristo | |
5 | * Tampere University of Technology | |
6 | * Institute of Communications Engineering | |
7 | * Copyright (C) 2013-2015 Christian Franke <chris@opensourcerouting.org> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify it | |
10 | * under the terms of the GNU General Public Licenseas published by the Free | |
11 | * Software Foundation; either version 2 of the License, or (at your option) | |
12 | * any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful,but WITHOUT | |
15 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
16 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
17 | * more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; see the file COPYING; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
22 | */ | |
23 | ||
24 | #include <zebra.h> | |
25 | ||
26 | #include "thread.h" | |
27 | #include "command.h" | |
28 | #include "memory.h" | |
29 | #include "log.h" | |
30 | #include "lib_errors.h" | |
31 | #include "if.h" | |
32 | #include "network.h" | |
33 | #include "prefix.h" | |
34 | #include "zclient.h" | |
35 | #include "stream.h" | |
36 | #include "linklist.h" | |
37 | #include "nexthop.h" | |
38 | #include "vrf.h" | |
39 | #include "libfrr.h" | |
40 | ||
41 | #include "isisd/isis_constants.h" | |
42 | #include "isisd/isis_common.h" | |
43 | #include "isisd/isis_flags.h" | |
44 | #include "isisd/isis_misc.h" | |
45 | #include "isisd/isis_circuit.h" | |
46 | #include "isisd/isisd.h" | |
47 | #include "isisd/isis_circuit.h" | |
48 | #include "isisd/isis_csm.h" | |
49 | #include "isisd/isis_lsp.h" | |
50 | #include "isisd/isis_route.h" | |
51 | #include "isisd/isis_zebra.h" | |
52 | #include "isisd/isis_adjacency.h" | |
53 | #include "isisd/isis_te.h" | |
54 | #include "isisd/isis_sr.h" | |
55 | #include "isisd/isis_ldp_sync.h" | |
56 | ||
57 | struct zclient *zclient; | |
58 | static struct zclient *zclient_sync; | |
59 | ||
60 | /* Router-id update message from zebra. */ | |
61 | static int isis_router_id_update_zebra(ZAPI_CALLBACK_ARGS) | |
62 | { | |
63 | struct isis_area *area; | |
64 | struct listnode *node; | |
65 | struct prefix router_id; | |
66 | struct isis *isis = NULL; | |
67 | ||
68 | isis = isis_lookup_by_vrfid(vrf_id); | |
69 | ||
70 | if (isis == NULL) { | |
71 | return -1; | |
72 | } | |
73 | ||
74 | zebra_router_id_update_read(zclient->ibuf, &router_id); | |
75 | if (isis->router_id == router_id.u.prefix4.s_addr) | |
76 | return 0; | |
77 | ||
78 | isis->router_id = router_id.u.prefix4.s_addr; | |
79 | for (ALL_LIST_ELEMENTS_RO(isis->area_list, node, area)) | |
80 | if (listcount(area->area_addrs) > 0) | |
81 | lsp_regenerate_schedule(area, area->is_type, 0); | |
82 | ||
83 | return 0; | |
84 | } | |
85 | ||
86 | static int isis_zebra_if_address_add(ZAPI_CALLBACK_ARGS) | |
87 | { | |
88 | struct isis_circuit *circuit; | |
89 | struct connected *c; | |
90 | ||
91 | c = zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_ADD, | |
92 | zclient->ibuf, vrf_id); | |
93 | ||
94 | if (c == NULL) | |
95 | return 0; | |
96 | ||
97 | #ifdef EXTREME_DEBUG | |
98 | if (c->address->family == AF_INET) | |
99 | zlog_debug("connected IP address %pFX", c->address); | |
100 | if (c->address->family == AF_INET6) | |
101 | zlog_debug("connected IPv6 address %pFX", c->address); | |
102 | #endif /* EXTREME_DEBUG */ | |
103 | ||
104 | if (if_is_operative(c->ifp)) { | |
105 | circuit = circuit_scan_by_ifp(c->ifp); | |
106 | if (circuit) | |
107 | isis_circuit_add_addr(circuit, c); | |
108 | } | |
109 | ||
110 | return 0; | |
111 | } | |
112 | ||
113 | static int isis_zebra_if_address_del(ZAPI_CALLBACK_ARGS) | |
114 | { | |
115 | struct isis_circuit *circuit; | |
116 | struct connected *c; | |
117 | ||
118 | c = zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_DELETE, | |
119 | zclient->ibuf, vrf_id); | |
120 | ||
121 | if (c == NULL) | |
122 | return 0; | |
123 | ||
124 | #ifdef EXTREME_DEBUG | |
125 | if (c->address->family == AF_INET) | |
126 | zlog_debug("disconnected IP address %pFX", c->address); | |
127 | if (c->address->family == AF_INET6) | |
128 | zlog_debug("disconnected IPv6 address %pFX", c->address); | |
129 | #endif /* EXTREME_DEBUG */ | |
130 | ||
131 | if (if_is_operative(c->ifp)) { | |
132 | circuit = circuit_scan_by_ifp(c->ifp); | |
133 | if (circuit) | |
134 | isis_circuit_del_addr(circuit, c); | |
135 | } | |
136 | ||
137 | connected_free(&c); | |
138 | ||
139 | return 0; | |
140 | } | |
141 | ||
142 | static int isis_zebra_link_params(ZAPI_CALLBACK_ARGS) | |
143 | { | |
144 | struct interface *ifp; | |
145 | ||
146 | ifp = zebra_interface_link_params_read(zclient->ibuf, vrf_id); | |
147 | ||
148 | if (ifp == NULL) | |
149 | return 0; | |
150 | ||
151 | /* Update TE TLV */ | |
152 | isis_mpls_te_update(ifp); | |
153 | ||
154 | return 0; | |
155 | } | |
156 | ||
157 | enum isis_zebra_nexthop_type { | |
158 | ISIS_NEXTHOP_MAIN = 0, | |
159 | ISIS_NEXTHOP_BACKUP, | |
160 | }; | |
161 | ||
162 | static int isis_zebra_add_nexthops(struct isis *isis, struct list *nexthops, | |
163 | struct zapi_nexthop zapi_nexthops[], | |
164 | enum isis_zebra_nexthop_type type, | |
165 | bool mpls_lsp, uint8_t backup_nhs) | |
166 | { | |
167 | struct isis_nexthop *nexthop; | |
168 | struct listnode *node; | |
169 | int count = 0; | |
170 | ||
171 | /* Nexthops */ | |
172 | for (ALL_LIST_ELEMENTS_RO(nexthops, node, nexthop)) { | |
173 | struct zapi_nexthop *api_nh; | |
174 | ||
175 | if (count >= MULTIPATH_NUM) | |
176 | break; | |
177 | api_nh = &zapi_nexthops[count]; | |
178 | if (fabricd) | |
179 | SET_FLAG(api_nh->flags, ZAPI_NEXTHOP_FLAG_ONLINK); | |
180 | api_nh->vrf_id = isis->vrf_id; | |
181 | ||
182 | switch (nexthop->family) { | |
183 | case AF_INET: | |
184 | /* FIXME: can it be ? */ | |
185 | if (nexthop->ip.ipv4.s_addr != INADDR_ANY) { | |
186 | api_nh->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
187 | api_nh->gate.ipv4 = nexthop->ip.ipv4; | |
188 | } else { | |
189 | api_nh->type = NEXTHOP_TYPE_IFINDEX; | |
190 | } | |
191 | break; | |
192 | case AF_INET6: | |
193 | if (!IN6_IS_ADDR_LINKLOCAL(&nexthop->ip.ipv6) | |
194 | && !IN6_IS_ADDR_UNSPECIFIED(&nexthop->ip.ipv6)) { | |
195 | continue; | |
196 | } | |
197 | api_nh->gate.ipv6 = nexthop->ip.ipv6; | |
198 | api_nh->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
199 | break; | |
200 | default: | |
201 | flog_err(EC_LIB_DEVELOPMENT, | |
202 | "%s: unknown address family [%d]", __func__, | |
203 | nexthop->family); | |
204 | exit(1); | |
205 | } | |
206 | ||
207 | api_nh->ifindex = nexthop->ifindex; | |
208 | ||
209 | /* Add MPLS label(s). */ | |
210 | switch (type) { | |
211 | case ISIS_NEXTHOP_MAIN: | |
212 | if (nexthop->sr.present) { | |
213 | api_nh->label_num = 1; | |
214 | api_nh->labels[0] = nexthop->sr.label; | |
215 | } else if (mpls_lsp) | |
216 | /* | |
217 | * Do not use non-SR enabled nexthops to prevent | |
218 | * broken LSPs from being formed. | |
219 | */ | |
220 | continue; | |
221 | break; | |
222 | case ISIS_NEXTHOP_BACKUP: | |
223 | if (nexthop->label_stack) { | |
224 | api_nh->label_num = | |
225 | nexthop->label_stack->num_labels; | |
226 | memcpy(api_nh->labels, | |
227 | nexthop->label_stack->label, | |
228 | sizeof(mpls_label_t) | |
229 | * api_nh->label_num); | |
230 | } else if (mpls_lsp) { | |
231 | /* | |
232 | * This is necessary because zebra requires | |
233 | * the nexthops of MPLS LSPs to be labeled. | |
234 | */ | |
235 | api_nh->label_num = 1; | |
236 | api_nh->labels[0] = MPLS_LABEL_IMPLICIT_NULL; | |
237 | } | |
238 | break; | |
239 | } | |
240 | ||
241 | /* Backup nexthop handling. */ | |
242 | if (backup_nhs) { | |
243 | SET_FLAG(api_nh->flags, ZAPI_NEXTHOP_FLAG_HAS_BACKUP); | |
244 | /* | |
245 | * If the backup has multiple nexthops, all of them | |
246 | * protect the same primary nexthop since ECMP routes | |
247 | * have no backups. | |
248 | */ | |
249 | api_nh->backup_num = backup_nhs; | |
250 | for (int i = 0; i < backup_nhs; i++) | |
251 | api_nh->backup_idx[i] = i; | |
252 | } | |
253 | count++; | |
254 | } | |
255 | ||
256 | return count; | |
257 | } | |
258 | ||
259 | void isis_zebra_route_add_route(struct isis *isis, struct prefix *prefix, | |
260 | struct prefix_ipv6 *src_p, | |
261 | struct isis_route_info *route_info) | |
262 | { | |
263 | struct zapi_route api; | |
264 | int count = 0; | |
265 | ||
266 | if (zclient->sock < 0) | |
267 | return; | |
268 | ||
269 | /* Uninstall the route if it doesn't have any valid nexthop. */ | |
270 | if (list_isempty(route_info->nexthops)) { | |
271 | isis_zebra_route_del_route(isis, prefix, src_p, route_info); | |
272 | return; | |
273 | } | |
274 | ||
275 | memset(&api, 0, sizeof(api)); | |
276 | api.vrf_id = isis->vrf_id; | |
277 | api.type = PROTO_TYPE; | |
278 | api.safi = SAFI_UNICAST; | |
279 | api.prefix = *prefix; | |
280 | if (src_p && src_p->prefixlen) { | |
281 | api.src_prefix = *src_p; | |
282 | SET_FLAG(api.message, ZAPI_MESSAGE_SRCPFX); | |
283 | } | |
284 | SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP); | |
285 | SET_FLAG(api.message, ZAPI_MESSAGE_METRIC); | |
286 | api.metric = route_info->cost; | |
287 | ||
288 | /* Add backup nexthops first. */ | |
289 | if (route_info->backup) { | |
290 | count = isis_zebra_add_nexthops( | |
291 | isis, route_info->backup->nexthops, api.backup_nexthops, | |
292 | ISIS_NEXTHOP_BACKUP, false, 0); | |
293 | if (count > 0) { | |
294 | SET_FLAG(api.message, ZAPI_MESSAGE_BACKUP_NEXTHOPS); | |
295 | api.backup_nexthop_num = count; | |
296 | } | |
297 | } | |
298 | ||
299 | /* Add primary nexthops. */ | |
300 | count = isis_zebra_add_nexthops(isis, route_info->nexthops, | |
301 | api.nexthops, ISIS_NEXTHOP_MAIN, false, | |
302 | count); | |
303 | if (!count) | |
304 | return; | |
305 | api.nexthop_num = count; | |
306 | ||
307 | zclient_route_send(ZEBRA_ROUTE_ADD, zclient, &api); | |
308 | } | |
309 | ||
310 | void isis_zebra_route_del_route(struct isis *isis, | |
311 | struct prefix *prefix, | |
312 | struct prefix_ipv6 *src_p, | |
313 | struct isis_route_info *route_info) | |
314 | { | |
315 | struct zapi_route api; | |
316 | ||
317 | if (zclient->sock < 0) | |
318 | return; | |
319 | ||
320 | memset(&api, 0, sizeof(api)); | |
321 | api.vrf_id = isis->vrf_id; | |
322 | api.type = PROTO_TYPE; | |
323 | api.safi = SAFI_UNICAST; | |
324 | api.prefix = *prefix; | |
325 | if (src_p && src_p->prefixlen) { | |
326 | api.src_prefix = *src_p; | |
327 | SET_FLAG(api.message, ZAPI_MESSAGE_SRCPFX); | |
328 | } | |
329 | ||
330 | zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api); | |
331 | } | |
332 | ||
333 | /** | |
334 | * Install Prefix-SID label entry in the forwarding plane through Zebra. | |
335 | * | |
336 | * @param area IS-IS area | |
337 | * @param prefix Route prefix | |
338 | * @param rinfo Route information | |
339 | * @param psid Prefix-SID information | |
340 | */ | |
341 | void isis_zebra_prefix_sid_install(struct isis_area *area, | |
342 | struct prefix *prefix, | |
343 | struct isis_route_info *rinfo, | |
344 | struct isis_sr_psid_info *psid) | |
345 | { | |
346 | struct zapi_labels zl; | |
347 | int count = 0; | |
348 | ||
349 | sr_debug("ISIS-Sr (%s): update label %u for prefix %pFX", | |
350 | area->area_tag, psid->label, prefix); | |
351 | ||
352 | /* Prepare message. */ | |
353 | memset(&zl, 0, sizeof(zl)); | |
354 | zl.type = ZEBRA_LSP_ISIS_SR; | |
355 | zl.local_label = psid->label; | |
356 | ||
357 | /* Local routes don't have any nexthop and require special handling. */ | |
358 | if (list_isempty(rinfo->nexthops)) { | |
359 | struct zapi_nexthop *znh; | |
360 | struct interface *ifp; | |
361 | ||
362 | ifp = if_lookup_by_name("lo", VRF_DEFAULT); | |
363 | if (!ifp) { | |
364 | zlog_warn( | |
365 | "%s: couldn't install Prefix-SID %pFX: loopback interface not found", | |
366 | __func__, prefix); | |
367 | return; | |
368 | } | |
369 | ||
370 | znh = &zl.nexthops[zl.nexthop_num++]; | |
371 | znh->type = NEXTHOP_TYPE_IFINDEX; | |
372 | znh->ifindex = ifp->ifindex; | |
373 | znh->label_num = 1; | |
374 | znh->labels[0] = MPLS_LABEL_IMPLICIT_NULL; | |
375 | } else { | |
376 | /* Add backup nexthops first. */ | |
377 | if (rinfo->backup) { | |
378 | count = isis_zebra_add_nexthops( | |
379 | area->isis, rinfo->backup->nexthops, | |
380 | zl.backup_nexthops, ISIS_NEXTHOP_BACKUP, true, | |
381 | 0); | |
382 | if (count > 0) { | |
383 | SET_FLAG(zl.message, ZAPI_LABELS_HAS_BACKUPS); | |
384 | zl.backup_nexthop_num = count; | |
385 | } | |
386 | } | |
387 | ||
388 | /* Add primary nexthops. */ | |
389 | count = isis_zebra_add_nexthops(area->isis, rinfo->nexthops, | |
390 | zl.nexthops, ISIS_NEXTHOP_MAIN, | |
391 | true, count); | |
392 | if (!count) | |
393 | return; | |
394 | zl.nexthop_num = count; | |
395 | } | |
396 | ||
397 | /* Send message to zebra. */ | |
398 | (void)zebra_send_mpls_labels(zclient, ZEBRA_MPLS_LABELS_REPLACE, &zl); | |
399 | } | |
400 | ||
401 | /** | |
402 | * Uninstall Prefix-SID label entry from the forwarding plane through Zebra. | |
403 | * | |
404 | * @param area IS-IS area | |
405 | * @param prefix Route prefix | |
406 | * @param rinfo Route information | |
407 | * @param psid Prefix-SID information | |
408 | */ | |
409 | void isis_zebra_prefix_sid_uninstall(struct isis_area *area, | |
410 | struct prefix *prefix, | |
411 | struct isis_route_info *rinfo, | |
412 | struct isis_sr_psid_info *psid) | |
413 | { | |
414 | struct zapi_labels zl; | |
415 | ||
416 | sr_debug("ISIS-Sr (%s): delete label %u for prefix %pFX", | |
417 | area->area_tag, psid->label, prefix); | |
418 | ||
419 | /* Prepare message. */ | |
420 | memset(&zl, 0, sizeof(zl)); | |
421 | zl.type = ZEBRA_LSP_ISIS_SR; | |
422 | zl.local_label = psid->label; | |
423 | ||
424 | /* Send message to zebra. */ | |
425 | (void)zebra_send_mpls_labels(zclient, ZEBRA_MPLS_LABELS_DELETE, &zl); | |
426 | } | |
427 | ||
428 | /** | |
429 | * Send (LAN)-Adjacency-SID to ZEBRA for installation or deletion. | |
430 | * | |
431 | * @param cmd ZEBRA_MPLS_LABELS_ADD or ZEBRA_ROUTE_DELETE | |
432 | * @param sra Segment Routing Adjacency-SID | |
433 | */ | |
434 | void isis_zebra_send_adjacency_sid(int cmd, const struct sr_adjacency *sra) | |
435 | { | |
436 | struct isis *isis = sra->adj->circuit->area->isis; | |
437 | struct zapi_labels zl; | |
438 | struct zapi_nexthop *znh; | |
439 | ||
440 | if (cmd != ZEBRA_MPLS_LABELS_ADD && cmd != ZEBRA_MPLS_LABELS_DELETE) { | |
441 | flog_warn(EC_LIB_DEVELOPMENT, "%s: wrong ZEBRA command", | |
442 | __func__); | |
443 | return; | |
444 | } | |
445 | ||
446 | sr_debug(" |- %s label %u for interface %s", | |
447 | cmd == ZEBRA_MPLS_LABELS_ADD ? "Add" : "Delete", | |
448 | sra->input_label, sra->adj->circuit->interface->name); | |
449 | ||
450 | memset(&zl, 0, sizeof(zl)); | |
451 | zl.type = ZEBRA_LSP_ISIS_SR; | |
452 | zl.local_label = sra->input_label; | |
453 | zl.nexthop_num = 1; | |
454 | znh = &zl.nexthops[0]; | |
455 | znh->gate = sra->nexthop.address; | |
456 | znh->type = (sra->nexthop.family == AF_INET) | |
457 | ? NEXTHOP_TYPE_IPV4_IFINDEX | |
458 | : NEXTHOP_TYPE_IPV6_IFINDEX; | |
459 | znh->ifindex = sra->adj->circuit->interface->ifindex; | |
460 | znh->label_num = 1; | |
461 | znh->labels[0] = MPLS_LABEL_IMPLICIT_NULL; | |
462 | ||
463 | /* Set backup nexthops. */ | |
464 | if (sra->type == ISIS_SR_LAN_BACKUP) { | |
465 | int count; | |
466 | ||
467 | count = isis_zebra_add_nexthops(isis, sra->backup_nexthops, | |
468 | zl.backup_nexthops, | |
469 | ISIS_NEXTHOP_BACKUP, true, 0); | |
470 | if (count > 0) { | |
471 | SET_FLAG(zl.message, ZAPI_LABELS_HAS_BACKUPS); | |
472 | zl.backup_nexthop_num = count; | |
473 | ||
474 | SET_FLAG(znh->flags, ZAPI_NEXTHOP_FLAG_HAS_BACKUP); | |
475 | znh->backup_num = count; | |
476 | for (int i = 0; i < count; i++) | |
477 | znh->backup_idx[i] = i; | |
478 | } | |
479 | } | |
480 | ||
481 | (void)zebra_send_mpls_labels(zclient, cmd, &zl); | |
482 | } | |
483 | ||
484 | static int isis_zebra_read(ZAPI_CALLBACK_ARGS) | |
485 | { | |
486 | struct zapi_route api; | |
487 | struct isis *isis = NULL; | |
488 | ||
489 | isis = isis_lookup_by_vrfid(vrf_id); | |
490 | ||
491 | if (isis == NULL) | |
492 | return -1; | |
493 | ||
494 | if (zapi_route_decode(zclient->ibuf, &api) < 0) | |
495 | return -1; | |
496 | ||
497 | if (api.prefix.family == AF_INET6 | |
498 | && IN6_IS_ADDR_LINKLOCAL(&api.prefix.u.prefix6)) | |
499 | return 0; | |
500 | ||
501 | /* | |
502 | * Avoid advertising a false default reachability. (A default | |
503 | * route installed by IS-IS gets redistributed from zebra back | |
504 | * into IS-IS causing us to start advertising default reachabity | |
505 | * without this check) | |
506 | */ | |
507 | if (api.prefix.prefixlen == 0 | |
508 | && api.src_prefix.prefixlen == 0 | |
509 | && api.type == PROTO_TYPE) { | |
510 | cmd = ZEBRA_REDISTRIBUTE_ROUTE_DEL; | |
511 | } | |
512 | ||
513 | if (cmd == ZEBRA_REDISTRIBUTE_ROUTE_ADD) | |
514 | isis_redist_add(isis, api.type, &api.prefix, &api.src_prefix, | |
515 | api.distance, api.metric); | |
516 | else | |
517 | isis_redist_delete(isis, api.type, &api.prefix, | |
518 | &api.src_prefix); | |
519 | ||
520 | return 0; | |
521 | } | |
522 | ||
523 | int isis_distribute_list_update(int routetype) | |
524 | { | |
525 | return 0; | |
526 | } | |
527 | ||
528 | void isis_zebra_redistribute_set(afi_t afi, int type) | |
529 | { | |
530 | if (type == DEFAULT_ROUTE) | |
531 | zclient_redistribute_default(ZEBRA_REDISTRIBUTE_DEFAULT_ADD, | |
532 | zclient, afi, VRF_DEFAULT); | |
533 | else | |
534 | zclient_redistribute(ZEBRA_REDISTRIBUTE_ADD, zclient, afi, type, | |
535 | 0, VRF_DEFAULT); | |
536 | } | |
537 | ||
538 | void isis_zebra_redistribute_unset(afi_t afi, int type) | |
539 | { | |
540 | if (type == DEFAULT_ROUTE) | |
541 | zclient_redistribute_default(ZEBRA_REDISTRIBUTE_DEFAULT_DELETE, | |
542 | zclient, afi, VRF_DEFAULT); | |
543 | else | |
544 | zclient_redistribute(ZEBRA_REDISTRIBUTE_DELETE, zclient, afi, | |
545 | type, 0, VRF_DEFAULT); | |
546 | } | |
547 | ||
548 | /* Label Manager Functions */ | |
549 | ||
550 | /** | |
551 | * Check if Label Manager is Ready or not. | |
552 | * | |
553 | * @return True if Label Manager is ready, False otherwise | |
554 | */ | |
555 | bool isis_zebra_label_manager_ready(void) | |
556 | { | |
557 | return (zclient_sync->sock > 0); | |
558 | } | |
559 | ||
560 | /** | |
561 | * Request Label Range to the Label Manager. | |
562 | * | |
563 | * @param base base label of the label range to request | |
564 | * @param chunk_size size of the label range to request | |
565 | * | |
566 | * @return 0 on success, -1 on failure | |
567 | */ | |
568 | int isis_zebra_request_label_range(uint32_t base, uint32_t chunk_size) | |
569 | { | |
570 | int ret; | |
571 | uint32_t start, end; | |
572 | ||
573 | if (zclient_sync->sock < 0) | |
574 | return -1; | |
575 | ||
576 | ret = lm_get_label_chunk(zclient_sync, 0, base, chunk_size, &start, | |
577 | &end); | |
578 | if (ret < 0) { | |
579 | zlog_warn("%s: error getting label range!", __func__); | |
580 | return -1; | |
581 | } | |
582 | ||
583 | return 0; | |
584 | } | |
585 | ||
586 | /** | |
587 | * Release Label Range to the Label Manager. | |
588 | * | |
589 | * @param start start of label range to release | |
590 | * @param end end of label range to release | |
591 | * | |
592 | * @return 0 on success, -1 otherwise | |
593 | */ | |
594 | int isis_zebra_release_label_range(uint32_t start, uint32_t end) | |
595 | { | |
596 | int ret; | |
597 | ||
598 | if (zclient_sync->sock < 0) | |
599 | return -1; | |
600 | ||
601 | ret = lm_release_label_chunk(zclient_sync, start, end); | |
602 | if (ret < 0) { | |
603 | zlog_warn("%s: error releasing label range!", __func__); | |
604 | return -1; | |
605 | } | |
606 | ||
607 | return 0; | |
608 | } | |
609 | ||
610 | /** | |
611 | * Connect to the Label Manager. | |
612 | * | |
613 | * @return 0 on success, -1 otherwise | |
614 | */ | |
615 | int isis_zebra_label_manager_connect(void) | |
616 | { | |
617 | /* Connect to label manager. */ | |
618 | if (zclient_socket_connect(zclient_sync) < 0) { | |
619 | zlog_warn("%s: failed connecting synchronous zclient!", | |
620 | __func__); | |
621 | return -1; | |
622 | } | |
623 | /* make socket non-blocking */ | |
624 | set_nonblocking(zclient_sync->sock); | |
625 | ||
626 | /* Send hello to notify zebra this is a synchronous client */ | |
627 | if (zclient_send_hello(zclient_sync) == ZCLIENT_SEND_FAILURE) { | |
628 | zlog_warn("%s: failed sending hello for synchronous zclient!", | |
629 | __func__); | |
630 | close(zclient_sync->sock); | |
631 | zclient_sync->sock = -1; | |
632 | return -1; | |
633 | } | |
634 | ||
635 | /* Connect to label manager */ | |
636 | if (lm_label_manager_connect(zclient_sync, 0) != 0) { | |
637 | zlog_warn("%s: failed connecting to label manager!", __func__); | |
638 | if (zclient_sync->sock > 0) { | |
639 | close(zclient_sync->sock); | |
640 | zclient_sync->sock = -1; | |
641 | } | |
642 | return -1; | |
643 | } | |
644 | ||
645 | sr_debug("ISIS-Sr: Successfully connected to the Label Manager"); | |
646 | ||
647 | return 0; | |
648 | } | |
649 | ||
650 | void isis_zebra_vrf_register(struct isis *isis) | |
651 | { | |
652 | if (!zclient || zclient->sock < 0 || !isis) | |
653 | return; | |
654 | ||
655 | if (isis->vrf_id != VRF_UNKNOWN) { | |
656 | if (IS_DEBUG_EVENTS) | |
657 | zlog_debug("%s: Register VRF %s id %u", __func__, | |
658 | isis->name, isis->vrf_id); | |
659 | zclient_send_reg_requests(zclient, isis->vrf_id); | |
660 | } | |
661 | } | |
662 | ||
663 | ||
664 | static void isis_zebra_connected(struct zclient *zclient) | |
665 | { | |
666 | zclient_send_reg_requests(zclient, VRF_DEFAULT); | |
667 | } | |
668 | ||
669 | /* | |
670 | * opaque messages between processes | |
671 | */ | |
672 | static int isis_opaque_msg_handler(ZAPI_CALLBACK_ARGS) | |
673 | { | |
674 | struct stream *s; | |
675 | struct zapi_opaque_msg info; | |
676 | struct ldp_igp_sync_if_state state; | |
677 | struct ldp_igp_sync_announce announce; | |
678 | struct ldp_igp_sync_hello hello; | |
679 | int ret = 0; | |
680 | ||
681 | s = zclient->ibuf; | |
682 | if (zclient_opaque_decode(s, &info) != 0) | |
683 | return -1; | |
684 | ||
685 | switch (info.type) { | |
686 | case LDP_IGP_SYNC_IF_STATE_UPDATE: | |
687 | STREAM_GET(&state, s, sizeof(state)); | |
688 | ret = isis_ldp_sync_state_update(state); | |
689 | break; | |
690 | case LDP_IGP_SYNC_ANNOUNCE_UPDATE: | |
691 | STREAM_GET(&announce, s, sizeof(announce)); | |
692 | ret = isis_ldp_sync_announce_update(announce); | |
693 | break; | |
694 | case LDP_IGP_SYNC_HELLO_UPDATE: | |
695 | STREAM_GET(&hello, s, sizeof(hello)); | |
696 | ret = isis_ldp_sync_hello_update(hello); | |
697 | break; | |
698 | default: | |
699 | break; | |
700 | } | |
701 | ||
702 | stream_failure: | |
703 | ||
704 | return ret; | |
705 | } | |
706 | ||
707 | void isis_zebra_init(struct thread_master *master, int instance) | |
708 | { | |
709 | /* Initialize asynchronous zclient. */ | |
710 | zclient = zclient_new(master, &zclient_options_default); | |
711 | zclient_init(zclient, PROTO_TYPE, 0, &isisd_privs); | |
712 | zclient->zebra_connected = isis_zebra_connected; | |
713 | zclient->router_id_update = isis_router_id_update_zebra; | |
714 | zclient->interface_address_add = isis_zebra_if_address_add; | |
715 | zclient->interface_address_delete = isis_zebra_if_address_del; | |
716 | zclient->interface_link_params = isis_zebra_link_params; | |
717 | zclient->redistribute_route_add = isis_zebra_read; | |
718 | zclient->redistribute_route_del = isis_zebra_read; | |
719 | ||
720 | /* Initialize special zclient for synchronous message exchanges. */ | |
721 | struct zclient_options options = zclient_options_default; | |
722 | options.synchronous = true; | |
723 | zclient_sync = zclient_new(master, &options); | |
724 | zclient_sync->sock = -1; | |
725 | zclient_sync->redist_default = ZEBRA_ROUTE_ISIS; | |
726 | zclient_sync->instance = instance; | |
727 | /* | |
728 | * session_id must be different from default value (0) to distinguish | |
729 | * the asynchronous socket from the synchronous one | |
730 | */ | |
731 | zclient_sync->session_id = 1; | |
732 | zclient_sync->privs = &isisd_privs; | |
733 | ||
734 | zclient->opaque_msg_handler = isis_opaque_msg_handler; | |
735 | } | |
736 | ||
737 | void isis_zebra_stop(void) | |
738 | { | |
739 | zclient_stop(zclient_sync); | |
740 | zclient_free(zclient_sync); | |
741 | zclient_stop(zclient); | |
742 | zclient_free(zclient); | |
743 | frr_fini(); | |
744 | } |