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eb5d44eb | 1 | /* |
d62a17ae | 2 | * IS-IS Rout(e)ing protocol - isis_zebra.c |
eb5d44eb | 3 | * |
4 | * Copyright (C) 2001,2002 Sampo Saaristo | |
d62a17ae | 5 | * Tampere University of Technology |
eb5d44eb | 6 | * Institute of Communications Engineering |
f3ccedaa | 7 | * Copyright (C) 2013-2015 Christian Franke <chris@opensourcerouting.org> |
eb5d44eb | 8 | * |
d62a17ae | 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) | |
eb5d44eb | 12 | * any later version. |
13 | * | |
d62a17ae | 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 | |
eb5d44eb | 17 | * more details. |
896014f4 DL |
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 | |
eb5d44eb | 22 | */ |
23 | ||
24 | #include <zebra.h> | |
eb5d44eb | 25 | |
26 | #include "thread.h" | |
27 | #include "command.h" | |
28 | #include "memory.h" | |
29 | #include "log.h" | |
363be4dd | 30 | #include "lib_errors.h" |
eb5d44eb | 31 | #include "if.h" |
32 | #include "network.h" | |
33 | #include "prefix.h" | |
34 | #include "zclient.h" | |
35 | #include "stream.h" | |
36 | #include "linklist.h" | |
f3ccedaa | 37 | #include "nexthop.h" |
7076bb2f | 38 | #include "vrf.h" |
8879bd22 | 39 | #include "libfrr.h" |
eb5d44eb | 40 | |
41 | #include "isisd/isis_constants.h" | |
42 | #include "isisd/isis_common.h" | |
3f045a08 JB |
43 | #include "isisd/isis_flags.h" |
44 | #include "isisd/isis_misc.h" | |
45 | #include "isisd/isis_circuit.h" | |
c89c05dd | 46 | #include "isisd/isisd.h" |
eb5d44eb | 47 | #include "isisd/isis_circuit.h" |
48 | #include "isisd/isis_csm.h" | |
3f045a08 | 49 | #include "isisd/isis_lsp.h" |
eb5d44eb | 50 | #include "isisd/isis_route.h" |
51 | #include "isisd/isis_zebra.h" | |
c3f7b406 | 52 | #include "isisd/isis_adjacency.h" |
f8c06e2c | 53 | #include "isisd/isis_te.h" |
26f6acaf | 54 | #include "isisd/isis_sr.h" |
1cbf96a8 | 55 | #include "isisd/isis_ldp_sync.h" |
eb5d44eb | 56 | |
26f6acaf RW |
57 | struct zclient *zclient; |
58 | static struct zclient *zclient_sync; | |
59 | ||
18a6dce6 | 60 | /* Router-id update message from zebra. */ |
121f9dee | 61 | static int isis_router_id_update_zebra(ZAPI_CALLBACK_ARGS) |
18a6dce6 | 62 | { |
d62a17ae | 63 | struct isis_area *area; |
64 | struct listnode *node; | |
65 | struct prefix router_id; | |
eab88f36 K |
66 | struct isis *isis = NULL; |
67 | ||
68 | isis = isis_lookup_by_vrfid(vrf_id); | |
69 | ||
70 | if (isis == NULL) { | |
71 | return -1; | |
72 | } | |
d62a17ae | 73 | |
d62a17ae | 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; | |
18a6dce6 | 84 | } |
eb5d44eb | 85 | |
121f9dee | 86 | static int isis_zebra_if_address_add(ZAPI_CALLBACK_ARGS) |
eb5d44eb | 87 | { |
115f8f56 | 88 | struct isis_circuit *circuit; |
d62a17ae | 89 | struct connected *c; |
eb5d44eb | 90 | |
d62a17ae | 91 | c = zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_ADD, |
92 | zclient->ibuf, vrf_id); | |
f390d2c7 | 93 | |
d62a17ae | 94 | if (c == NULL) |
95 | return 0; | |
f390d2c7 | 96 | |
62f30dcc | 97 | #ifdef EXTREME_DEBUG |
d62a17ae | 98 | if (p->family == AF_INET) |
2dbe669b | 99 | zlog_debug("connected IP address %pFX", c->address); |
d62a17ae | 100 | if (p->family == AF_INET6) |
2dbe669b | 101 | zlog_debug("connected IPv6 address %pFX", c->address); |
eb5d44eb | 102 | #endif /* EXTREME_DEBUG */ |
115f8f56 IR |
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 | } | |
eb5d44eb | 109 | |
d62a17ae | 110 | return 0; |
eb5d44eb | 111 | } |
112 | ||
121f9dee | 113 | static int isis_zebra_if_address_del(ZAPI_CALLBACK_ARGS) |
eb5d44eb | 114 | { |
115f8f56 | 115 | struct isis_circuit *circuit; |
d62a17ae | 116 | struct connected *c; |
eb5d44eb | 117 | |
d62a17ae | 118 | c = zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_DELETE, |
119 | zclient->ibuf, vrf_id); | |
f390d2c7 | 120 | |
d62a17ae | 121 | if (c == NULL) |
122 | return 0; | |
f390d2c7 | 123 | |
f891f443 | 124 | #ifdef EXTREME_DEBUG |
d62a17ae | 125 | if (p->family == AF_INET) |
2dbe669b | 126 | zlog_debug("disconnected IP address %pFX", c->address); |
d62a17ae | 127 | if (p->family == AF_INET6) |
2dbe669b | 128 | zlog_debug("disconnected IPv6 address %pFX", c->address); |
f891f443 | 129 | #endif /* EXTREME_DEBUG */ |
f390d2c7 | 130 | |
115f8f56 IR |
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 | ||
721c0857 | 137 | connected_free(&c); |
f390d2c7 | 138 | |
d62a17ae | 139 | return 0; |
eb5d44eb | 140 | } |
141 | ||
121f9dee | 142 | static int isis_zebra_link_params(ZAPI_CALLBACK_ARGS) |
f8c06e2c | 143 | { |
d62a17ae | 144 | struct interface *ifp; |
f8c06e2c | 145 | |
edc12762 | 146 | ifp = zebra_interface_link_params_read(zclient->ibuf, vrf_id); |
f8c06e2c | 147 | |
d62a17ae | 148 | if (ifp == NULL) |
149 | return 0; | |
f8c06e2c | 150 | |
d62a17ae | 151 | /* Update TE TLV */ |
152 | isis_mpls_te_update(ifp); | |
f8c06e2c | 153 | |
d62a17ae | 154 | return 0; |
f8c06e2c OD |
155 | } |
156 | ||
c951ee6e | 157 | enum isis_zebra_nexthop_type { |
d47d6089 RW |
158 | ISIS_NEXTHOP_MAIN = 0, |
159 | ISIS_NEXTHOP_BACKUP, | |
c951ee6e RW |
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, | |
d47d6089 | 165 | bool mpls_lsp, uint8_t backup_nhs) |
eb5d44eb | 166 | { |
d62a17ae | 167 | struct isis_nexthop *nexthop; |
168 | struct listnode *node; | |
c0721de4 | 169 | int count = 0; |
d62a17ae | 170 | |
f80dd32b | 171 | /* Nexthops */ |
c951ee6e RW |
172 | for (ALL_LIST_ELEMENTS_RO(nexthops, node, nexthop)) { |
173 | struct zapi_nexthop *api_nh; | |
174 | ||
363be4dd RW |
175 | if (count >= MULTIPATH_NUM) |
176 | break; | |
c951ee6e | 177 | api_nh = &zapi_nexthops[count]; |
363be4dd | 178 | if (fabricd) |
68a02e06 | 179 | SET_FLAG(api_nh->flags, ZAPI_NEXTHOP_FLAG_ONLINK); |
dc18b3b0 | 180 | api_nh->vrf_id = isis->vrf_id; |
363be4dd RW |
181 | |
182 | switch (nexthop->family) { | |
183 | case AF_INET: | |
f80dd32b | 184 | /* FIXME: can it be ? */ |
363be4dd | 185 | if (nexthop->ip.ipv4.s_addr != INADDR_ANY) { |
f80dd32b | 186 | api_nh->type = NEXTHOP_TYPE_IPV4_IFINDEX; |
363be4dd | 187 | api_nh->gate.ipv4 = nexthop->ip.ipv4; |
f80dd32b RW |
188 | } else { |
189 | api_nh->type = NEXTHOP_TYPE_IFINDEX; | |
190 | } | |
363be4dd RW |
191 | break; |
192 | case AF_INET6: | |
193 | if (!IN6_IS_ADDR_LINKLOCAL(&nexthop->ip.ipv6) | |
194 | && !IN6_IS_ADDR_UNSPECIFIED(&nexthop->ip.ipv6)) { | |
f80dd32b RW |
195 | continue; |
196 | } | |
363be4dd | 197 | api_nh->gate.ipv6 = nexthop->ip.ipv6; |
f80dd32b | 198 | api_nh->type = NEXTHOP_TYPE_IPV6_IFINDEX; |
363be4dd RW |
199 | break; |
200 | default: | |
201 | flog_err(EC_LIB_DEVELOPMENT, | |
202 | "%s: unknown address family [%d]", __func__, | |
203 | nexthop->family); | |
204 | exit(1); | |
d62a17ae | 205 | } |
363be4dd RW |
206 | |
207 | api_nh->ifindex = nexthop->ifindex; | |
c951ee6e RW |
208 | |
209 | /* Add MPLS label(s). */ | |
210 | switch (type) { | |
d47d6089 RW |
211 | case ISIS_NEXTHOP_MAIN: |
212 | if (nexthop->sr.present) { | |
c951ee6e RW |
213 | api_nh->label_num = 1; |
214 | api_nh->labels[0] = nexthop->sr.label; | |
d47d6089 RW |
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; | |
c951ee6e | 221 | break; |
d47d6089 | 222 | case ISIS_NEXTHOP_BACKUP: |
c951ee6e RW |
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); | |
d47d6089 RW |
230 | } else if (mpls_lsp) { |
231 | /* | |
232 | * This is necessary because zebra requires | |
233 | * the nexthops of MPLS LSPs to be labeled. | |
234 | */ | |
c951ee6e RW |
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 | } | |
363be4dd | 253 | count++; |
d62a17ae | 254 | } |
c951ee6e RW |
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 | ||
d47d6089 | 266 | if (zclient->sock < 0 || list_isempty(route_info->nexthops)) |
c0721de4 | 267 | return; |
f390d2c7 | 268 | |
c951ee6e RW |
269 | memset(&api, 0, sizeof(api)); |
270 | api.vrf_id = isis->vrf_id; | |
271 | api.type = PROTO_TYPE; | |
272 | api.safi = SAFI_UNICAST; | |
273 | api.prefix = *prefix; | |
274 | if (src_p && src_p->prefixlen) { | |
275 | api.src_prefix = *src_p; | |
276 | SET_FLAG(api.message, ZAPI_MESSAGE_SRCPFX); | |
277 | } | |
278 | SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP); | |
279 | SET_FLAG(api.message, ZAPI_MESSAGE_METRIC); | |
280 | api.metric = route_info->cost; | |
281 | ||
282 | /* Add backup nexthops first. */ | |
283 | if (route_info->backup) { | |
284 | count = isis_zebra_add_nexthops( | |
285 | isis, route_info->backup->nexthops, api.backup_nexthops, | |
d47d6089 | 286 | ISIS_NEXTHOP_BACKUP, false, 0); |
c951ee6e RW |
287 | if (count > 0) { |
288 | SET_FLAG(api.message, ZAPI_MESSAGE_BACKUP_NEXTHOPS); | |
289 | api.backup_nexthop_num = count; | |
290 | } | |
291 | } | |
292 | ||
293 | /* Add primary nexthops. */ | |
294 | count = isis_zebra_add_nexthops(isis, route_info->nexthops, | |
d47d6089 | 295 | api.nexthops, ISIS_NEXTHOP_MAIN, false, |
c951ee6e RW |
296 | count); |
297 | if (!count) | |
298 | return; | |
c0721de4 | 299 | api.nexthop_num = count; |
f390d2c7 | 300 | |
c0721de4 | 301 | zclient_route_send(ZEBRA_ROUTE_ADD, zclient, &api); |
eb5d44eb | 302 | } |
303 | ||
dc18b3b0 K |
304 | void isis_zebra_route_del_route(struct isis *isis, |
305 | struct prefix *prefix, | |
0a5f3f4f RW |
306 | struct prefix_ipv6 *src_p, |
307 | struct isis_route_info *route_info) | |
eb5d44eb | 308 | { |
c0721de4 | 309 | struct zapi_route api; |
d62a17ae | 310 | |
0a5f3f4f | 311 | if (zclient->sock < 0) |
d62a17ae | 312 | return; |
313 | ||
c0721de4 | 314 | memset(&api, 0, sizeof(api)); |
dc18b3b0 | 315 | api.vrf_id = isis->vrf_id; |
7c0cbd0e | 316 | api.type = PROTO_TYPE; |
d62a17ae | 317 | api.safi = SAFI_UNICAST; |
c0721de4 | 318 | api.prefix = *prefix; |
321c1bbb CF |
319 | if (src_p && src_p->prefixlen) { |
320 | api.src_prefix = *src_p; | |
321 | SET_FLAG(api.message, ZAPI_MESSAGE_SRCPFX); | |
322 | } | |
f390d2c7 | 323 | |
c0721de4 | 324 | zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api); |
eb5d44eb | 325 | } |
326 | ||
f2333421 | 327 | /** |
d47d6089 | 328 | * Install Prefix-SID label entry in the forwarding plane through Zebra. |
f2333421 | 329 | * |
d47d6089 RW |
330 | * @param area IS-IS area |
331 | * @param prefix Route prefix | |
332 | * @param rinfo Route information | |
333 | * @param psid Prefix-SID information | |
f2333421 | 334 | */ |
d47d6089 RW |
335 | void isis_zebra_prefix_sid_install(struct isis_area *area, |
336 | struct prefix *prefix, | |
337 | struct isis_route_info *rinfo, | |
338 | struct isis_sr_psid_info *psid) | |
26f6acaf RW |
339 | { |
340 | struct zapi_labels zl; | |
c951ee6e | 341 | int count = 0; |
26f6acaf | 342 | |
d47d6089 RW |
343 | sr_debug("ISIS-Sr (%s): update label %u for prefix %pFX", |
344 | area->area_tag, psid->label, prefix); | |
345 | ||
26f6acaf RW |
346 | /* Prepare message. */ |
347 | memset(&zl, 0, sizeof(zl)); | |
348 | zl.type = ZEBRA_LSP_ISIS_SR; | |
d47d6089 RW |
349 | zl.local_label = psid->label; |
350 | ||
351 | /* Local routes don't have any nexthop and require special handling. */ | |
352 | if (list_isempty(rinfo->nexthops)) { | |
353 | struct zapi_nexthop *znh; | |
354 | struct interface *ifp; | |
26f6acaf | 355 | |
26f6acaf RW |
356 | ifp = if_lookup_by_name("lo", VRF_DEFAULT); |
357 | if (!ifp) { | |
358 | zlog_warn( | |
359 | "%s: couldn't install Prefix-SID %pFX: loopback interface not found", | |
d47d6089 | 360 | __func__, prefix); |
26f6acaf RW |
361 | return; |
362 | } | |
363 | ||
364 | znh = &zl.nexthops[zl.nexthop_num++]; | |
365 | znh->type = NEXTHOP_TYPE_IFINDEX; | |
366 | znh->ifindex = ifp->ifindex; | |
e0e8a84f OD |
367 | znh->label_num = 1; |
368 | znh->labels[0] = MPLS_LABEL_IMPLICIT_NULL; | |
d47d6089 | 369 | } else { |
c951ee6e RW |
370 | /* Add backup nexthops first. */ |
371 | if (rinfo->backup) { | |
372 | count = isis_zebra_add_nexthops( | |
d47d6089 RW |
373 | area->isis, rinfo->backup->nexthops, |
374 | zl.backup_nexthops, ISIS_NEXTHOP_BACKUP, true, | |
c951ee6e RW |
375 | 0); |
376 | if (count > 0) { | |
377 | SET_FLAG(zl.message, ZAPI_LABELS_HAS_BACKUPS); | |
378 | zl.backup_nexthop_num = count; | |
379 | } | |
26f6acaf | 380 | } |
c951ee6e RW |
381 | |
382 | /* Add primary nexthops. */ | |
d47d6089 RW |
383 | count = isis_zebra_add_nexthops(area->isis, rinfo->nexthops, |
384 | zl.nexthops, ISIS_NEXTHOP_MAIN, | |
385 | true, count); | |
c951ee6e RW |
386 | if (!count) |
387 | return; | |
388 | zl.nexthop_num = count; | |
26f6acaf RW |
389 | } |
390 | ||
391 | /* Send message to zebra. */ | |
392 | (void)zebra_send_mpls_labels(zclient, ZEBRA_MPLS_LABELS_REPLACE, &zl); | |
393 | } | |
394 | ||
f2333421 | 395 | /** |
d47d6089 | 396 | * Uninstall Prefix-SID label entry from the forwarding plane through Zebra. |
f2333421 | 397 | * |
d47d6089 RW |
398 | * @param area IS-IS area |
399 | * @param prefix Route prefix | |
400 | * @param rinfo Route information | |
401 | * @param psid Prefix-SID information | |
f2333421 | 402 | */ |
d47d6089 RW |
403 | void isis_zebra_prefix_sid_uninstall(struct isis_area *area, |
404 | struct prefix *prefix, | |
405 | struct isis_route_info *rinfo, | |
406 | struct isis_sr_psid_info *psid) | |
26f6acaf RW |
407 | { |
408 | struct zapi_labels zl; | |
409 | ||
d47d6089 RW |
410 | sr_debug("ISIS-Sr (%s): delete label %u for prefix %pFX", |
411 | area->area_tag, psid->label, prefix); | |
412 | ||
26f6acaf RW |
413 | /* Prepare message. */ |
414 | memset(&zl, 0, sizeof(zl)); | |
415 | zl.type = ZEBRA_LSP_ISIS_SR; | |
d47d6089 | 416 | zl.local_label = psid->label; |
26f6acaf RW |
417 | |
418 | /* Send message to zebra. */ | |
419 | (void)zebra_send_mpls_labels(zclient, ZEBRA_MPLS_LABELS_DELETE, &zl); | |
420 | } | |
421 | ||
f2333421 OD |
422 | /** |
423 | * Send (LAN)-Adjacency-SID to ZEBRA for installation or deletion. | |
424 | * | |
425 | * @param cmd ZEBRA_MPLS_LABELS_ADD or ZEBRA_ROUTE_DELETE | |
426 | * @param sra Segment Routing Adjacency-SID | |
427 | */ | |
c3f7b406 OD |
428 | void isis_zebra_send_adjacency_sid(int cmd, const struct sr_adjacency *sra) |
429 | { | |
054fda12 | 430 | struct isis *isis = sra->adj->circuit->area->isis; |
c3f7b406 OD |
431 | struct zapi_labels zl; |
432 | struct zapi_nexthop *znh; | |
433 | ||
434 | if (cmd != ZEBRA_MPLS_LABELS_ADD && cmd != ZEBRA_MPLS_LABELS_DELETE) { | |
435 | flog_warn(EC_LIB_DEVELOPMENT, "%s: wrong ZEBRA command", | |
436 | __func__); | |
437 | return; | |
438 | } | |
439 | ||
440 | sr_debug(" |- %s label %u for interface %s", | |
441 | cmd == ZEBRA_MPLS_LABELS_ADD ? "Add" : "Delete", | |
054fda12 | 442 | sra->input_label, sra->adj->circuit->interface->name); |
c3f7b406 OD |
443 | |
444 | memset(&zl, 0, sizeof(zl)); | |
445 | zl.type = ZEBRA_LSP_ISIS_SR; | |
054fda12 | 446 | zl.local_label = sra->input_label; |
c3f7b406 OD |
447 | zl.nexthop_num = 1; |
448 | znh = &zl.nexthops[0]; | |
449 | znh->gate = sra->nexthop.address; | |
450 | znh->type = (sra->nexthop.family == AF_INET) | |
451 | ? NEXTHOP_TYPE_IPV4_IFINDEX | |
452 | : NEXTHOP_TYPE_IPV6_IFINDEX; | |
453 | znh->ifindex = sra->adj->circuit->interface->ifindex; | |
454 | znh->label_num = 1; | |
455 | znh->labels[0] = MPLS_LABEL_IMPLICIT_NULL; | |
456 | ||
054fda12 RW |
457 | /* Set backup nexthops. */ |
458 | if (sra->type == ISIS_SR_LAN_BACKUP) { | |
459 | int count; | |
460 | ||
461 | count = isis_zebra_add_nexthops(isis, sra->backup_nexthops, | |
462 | zl.backup_nexthops, | |
d47d6089 | 463 | ISIS_NEXTHOP_BACKUP, true, 0); |
054fda12 RW |
464 | if (count > 0) { |
465 | SET_FLAG(zl.message, ZAPI_LABELS_HAS_BACKUPS); | |
466 | zl.backup_nexthop_num = count; | |
467 | ||
468 | SET_FLAG(znh->flags, ZAPI_NEXTHOP_FLAG_HAS_BACKUP); | |
469 | znh->backup_num = count; | |
470 | for (int i = 0; i < count; i++) | |
471 | znh->backup_idx[i] = i; | |
472 | } | |
473 | } | |
474 | ||
c3f7b406 OD |
475 | (void)zebra_send_mpls_labels(zclient, cmd, &zl); |
476 | } | |
477 | ||
121f9dee | 478 | static int isis_zebra_read(ZAPI_CALLBACK_ARGS) |
eb5d44eb | 479 | { |
74489921 | 480 | struct zapi_route api; |
eab88f36 K |
481 | struct isis *isis = NULL; |
482 | ||
483 | isis = isis_lookup_by_vrfid(vrf_id); | |
484 | ||
485 | if (isis == NULL) | |
486 | return -1; | |
d62a17ae | 487 | |
74489921 RW |
488 | if (zapi_route_decode(zclient->ibuf, &api) < 0) |
489 | return -1; | |
d62a17ae | 490 | |
9fb2b879 DS |
491 | if (api.prefix.family == AF_INET6 |
492 | && IN6_IS_ADDR_LINKLOCAL(&api.prefix.u.prefix6)) | |
493 | return 0; | |
494 | ||
d62a17ae | 495 | /* |
496 | * Avoid advertising a false default reachability. (A default | |
497 | * route installed by IS-IS gets redistributed from zebra back | |
498 | * into IS-IS causing us to start advertising default reachabity | |
499 | * without this check) | |
500 | */ | |
d43d2df5 CF |
501 | if (api.prefix.prefixlen == 0 |
502 | && api.src_prefix.prefixlen == 0 | |
7c0cbd0e | 503 | && api.type == PROTO_TYPE) { |
121f9dee | 504 | cmd = ZEBRA_REDISTRIBUTE_ROUTE_DEL; |
d43d2df5 | 505 | } |
d62a17ae | 506 | |
121f9dee | 507 | if (cmd == ZEBRA_REDISTRIBUTE_ROUTE_ADD) |
eab88f36 | 508 | isis_redist_add(isis, api.type, &api.prefix, &api.src_prefix, |
d43d2df5 | 509 | api.distance, api.metric); |
d62a17ae | 510 | else |
eab88f36 K |
511 | isis_redist_delete(isis, api.type, &api.prefix, |
512 | &api.src_prefix); | |
d62a17ae | 513 | |
514 | return 0; | |
eb5d44eb | 515 | } |
eb5d44eb | 516 | |
d62a17ae | 517 | int isis_distribute_list_update(int routetype) |
eb5d44eb | 518 | { |
d62a17ae | 519 | return 0; |
eb5d44eb | 520 | } |
521 | ||
d62a17ae | 522 | void isis_zebra_redistribute_set(afi_t afi, int type) |
eb5d44eb | 523 | { |
d62a17ae | 524 | if (type == DEFAULT_ROUTE) |
525 | zclient_redistribute_default(ZEBRA_REDISTRIBUTE_DEFAULT_ADD, | |
49db7a7b | 526 | zclient, afi, VRF_DEFAULT); |
d62a17ae | 527 | else |
528 | zclient_redistribute(ZEBRA_REDISTRIBUTE_ADD, zclient, afi, type, | |
529 | 0, VRF_DEFAULT); | |
f3ccedaa CF |
530 | } |
531 | ||
d62a17ae | 532 | void isis_zebra_redistribute_unset(afi_t afi, int type) |
f3ccedaa | 533 | { |
d62a17ae | 534 | if (type == DEFAULT_ROUTE) |
535 | zclient_redistribute_default(ZEBRA_REDISTRIBUTE_DEFAULT_DELETE, | |
49db7a7b | 536 | zclient, afi, VRF_DEFAULT); |
d62a17ae | 537 | else |
538 | zclient_redistribute(ZEBRA_REDISTRIBUTE_DELETE, zclient, afi, | |
539 | type, 0, VRF_DEFAULT); | |
eb5d44eb | 540 | } |
541 | ||
774e3570 OD |
542 | /* Label Manager Functions */ |
543 | ||
58fbcdf2 OD |
544 | /** |
545 | * Check if Label Manager is Ready or not. | |
546 | * | |
547 | * @return True if Label Manager is ready, False otherwise | |
548 | */ | |
549 | bool isis_zebra_label_manager_ready(void) | |
550 | { | |
551 | return (zclient_sync->sock > 0); | |
552 | } | |
553 | ||
774e3570 OD |
554 | /** |
555 | * Request Label Range to the Label Manager. | |
556 | * | |
557 | * @param base base label of the label range to request | |
558 | * @param chunk_size size of the label range to request | |
559 | * | |
560 | * @return 0 on success, -1 on failure | |
561 | */ | |
26f6acaf RW |
562 | int isis_zebra_request_label_range(uint32_t base, uint32_t chunk_size) |
563 | { | |
564 | int ret; | |
565 | uint32_t start, end; | |
566 | ||
58fbcdf2 OD |
567 | if (zclient_sync->sock < 0) |
568 | return -1; | |
26f6acaf RW |
569 | |
570 | ret = lm_get_label_chunk(zclient_sync, 0, base, chunk_size, &start, | |
571 | &end); | |
572 | if (ret < 0) { | |
573 | zlog_warn("%s: error getting label range!", __func__); | |
574 | return -1; | |
575 | } | |
576 | ||
577 | return 0; | |
578 | } | |
579 | ||
774e3570 OD |
580 | /** |
581 | * Release Label Range to the Label Manager. | |
582 | * | |
583 | * @param start start of label range to release | |
584 | * @param end end of label range to release | |
774e3570 | 585 | * |
58fbcdf2 | 586 | * @return 0 on success, -1 otherwise |
774e3570 | 587 | */ |
58fbcdf2 | 588 | int isis_zebra_release_label_range(uint32_t start, uint32_t end) |
26f6acaf RW |
589 | { |
590 | int ret; | |
26f6acaf | 591 | |
58fbcdf2 | 592 | if (zclient_sync->sock < 0) |
26f6acaf | 593 | return -1; |
26f6acaf RW |
594 | |
595 | ret = lm_release_label_chunk(zclient_sync, start, end); | |
596 | if (ret < 0) { | |
26f6acaf | 597 | zlog_warn("%s: error releasing label range!", __func__); |
26f6acaf RW |
598 | return -1; |
599 | } | |
600 | ||
601 | return 0; | |
602 | } | |
603 | ||
774e3570 OD |
604 | /** |
605 | * Connect to the Label Manager. | |
58fbcdf2 OD |
606 | * |
607 | * @return 0 on success, -1 otherwise | |
774e3570 | 608 | */ |
58fbcdf2 | 609 | int isis_zebra_label_manager_connect(void) |
26f6acaf RW |
610 | { |
611 | /* Connect to label manager. */ | |
58fbcdf2 OD |
612 | if (zclient_socket_connect(zclient_sync) < 0) { |
613 | zlog_warn("%s: failed connecting synchronous zclient!", | |
26f6acaf | 614 | __func__); |
58fbcdf2 | 615 | return -1; |
26f6acaf | 616 | } |
774e3570 | 617 | /* make socket non-blocking */ |
26f6acaf | 618 | set_nonblocking(zclient_sync->sock); |
774e3570 OD |
619 | |
620 | /* Send hello to notify zebra this is a synchronous client */ | |
58fbcdf2 OD |
621 | if (zclient_send_hello(zclient_sync) < 0) { |
622 | zlog_warn("%s: failed sending hello for synchronous zclient!", | |
623 | __func__); | |
624 | close(zclient_sync->sock); | |
625 | zclient_sync->sock = -1; | |
626 | return -1; | |
774e3570 OD |
627 | } |
628 | ||
629 | /* Connect to label manager */ | |
58fbcdf2 OD |
630 | if (lm_label_manager_connect(zclient_sync, 0) != 0) { |
631 | zlog_warn("%s: failed connecting to label manager!", __func__); | |
632 | if (zclient_sync->sock > 0) { | |
633 | close(zclient_sync->sock); | |
634 | zclient_sync->sock = -1; | |
635 | } | |
636 | return -1; | |
26f6acaf RW |
637 | } |
638 | ||
58fbcdf2 OD |
639 | sr_debug("ISIS-Sr: Successfully connected to the Label Manager"); |
640 | ||
641 | return 0; | |
26f6acaf RW |
642 | } |
643 | ||
65251ce8 | 644 | void isis_zebra_vrf_register(struct isis *isis) |
645 | { | |
646 | if (!zclient || zclient->sock < 0 || !isis) | |
647 | return; | |
648 | ||
649 | if (isis->vrf_id != VRF_UNKNOWN) { | |
650 | if (IS_DEBUG_EVENTS) | |
651 | zlog_debug("%s: Register VRF %s id %u", __func__, | |
652 | isis->name, isis->vrf_id); | |
653 | zclient_send_reg_requests(zclient, isis->vrf_id); | |
654 | } | |
655 | } | |
656 | ||
657 | ||
d62a17ae | 658 | static void isis_zebra_connected(struct zclient *zclient) |
7076bb2f | 659 | { |
d62a17ae | 660 | zclient_send_reg_requests(zclient, VRF_DEFAULT); |
7076bb2f FL |
661 | } |
662 | ||
1cbf96a8 | 663 | /* |
664 | * opaque messages between processes | |
665 | */ | |
666 | static int isis_opaque_msg_handler(ZAPI_CALLBACK_ARGS) | |
667 | { | |
668 | struct stream *s; | |
669 | struct zapi_opaque_msg info; | |
670 | struct ldp_igp_sync_if_state state; | |
671 | struct ldp_igp_sync_announce announce; | |
672 | struct ldp_igp_sync_hello hello; | |
673 | int ret = 0; | |
674 | ||
675 | s = zclient->ibuf; | |
676 | if (zclient_opaque_decode(s, &info) != 0) | |
677 | return -1; | |
678 | ||
679 | switch (info.type) { | |
680 | case LDP_IGP_SYNC_IF_STATE_UPDATE: | |
681 | STREAM_GET(&state, s, sizeof(state)); | |
682 | ret = isis_ldp_sync_state_update(state); | |
683 | break; | |
684 | case LDP_IGP_SYNC_ANNOUNCE_UPDATE: | |
685 | STREAM_GET(&announce, s, sizeof(announce)); | |
686 | ret = isis_ldp_sync_announce_update(announce); | |
687 | break; | |
688 | case LDP_IGP_SYNC_HELLO_UPDATE: | |
689 | STREAM_GET(&hello, s, sizeof(hello)); | |
690 | ret = isis_ldp_sync_hello_update(hello); | |
691 | break; | |
692 | default: | |
693 | break; | |
694 | } | |
695 | ||
696 | stream_failure: | |
697 | ||
698 | return ret; | |
699 | } | |
700 | ||
26f6acaf | 701 | void isis_zebra_init(struct thread_master *master, int instance) |
eb5d44eb | 702 | { |
26f6acaf | 703 | /* Initialize asynchronous zclient. */ |
26f63a1e | 704 | zclient = zclient_new(master, &zclient_options_default); |
7c0cbd0e | 705 | zclient_init(zclient, PROTO_TYPE, 0, &isisd_privs); |
d62a17ae | 706 | zclient->zebra_connected = isis_zebra_connected; |
707 | zclient->router_id_update = isis_router_id_update_zebra; | |
d62a17ae | 708 | zclient->interface_address_add = isis_zebra_if_address_add; |
709 | zclient->interface_address_delete = isis_zebra_if_address_del; | |
710 | zclient->interface_link_params = isis_zebra_link_params; | |
74489921 RW |
711 | zclient->redistribute_route_add = isis_zebra_read; |
712 | zclient->redistribute_route_del = isis_zebra_read; | |
d62a17ae | 713 | |
26f6acaf | 714 | /* Initialize special zclient for synchronous message exchanges. */ |
774e3570 OD |
715 | struct zclient_options options = zclient_options_default; |
716 | options.synchronous = true; | |
717 | zclient_sync = zclient_new(master, &options); | |
26f6acaf RW |
718 | zclient_sync->sock = -1; |
719 | zclient_sync->redist_default = ZEBRA_ROUTE_ISIS; | |
720 | zclient_sync->instance = instance; | |
774e3570 OD |
721 | /* |
722 | * session_id must be different from default value (0) to distinguish | |
723 | * the asynchronous socket from the synchronous one | |
724 | */ | |
725 | zclient_sync->session_id = 1; | |
26f6acaf | 726 | zclient_sync->privs = &isisd_privs; |
1cbf96a8 | 727 | |
728 | zclient->opaque_msg_handler = isis_opaque_msg_handler; | |
eb5d44eb | 729 | } |
8d429559 | 730 | |
d62a17ae | 731 | void isis_zebra_stop(void) |
8d429559 | 732 | { |
58fbcdf2 OD |
733 | zclient_stop(zclient_sync); |
734 | zclient_free(zclient_sync); | |
d62a17ae | 735 | zclient_stop(zclient); |
736 | zclient_free(zclient); | |
8879bd22 | 737 | frr_fini(); |
8d429559 | 738 | } |