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acddc0ed | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
eb5d44eb | 2 | /* |
d62a17ae | 3 | * IS-IS Rout(e)ing protocol - isis_zebra.c |
eb5d44eb | 4 | * |
5 | * Copyright (C) 2001,2002 Sampo Saaristo | |
d62a17ae | 6 | * Tampere University of Technology |
eb5d44eb | 7 | * Institute of Communications Engineering |
f3ccedaa | 8 | * Copyright (C) 2013-2015 Christian Franke <chris@opensourcerouting.org> |
eb5d44eb | 9 | */ |
10 | ||
11 | #include <zebra.h> | |
eb5d44eb | 12 | |
24a58196 | 13 | #include "frrevent.h" |
eb5d44eb | 14 | #include "command.h" |
15 | #include "memory.h" | |
16 | #include "log.h" | |
363be4dd | 17 | #include "lib_errors.h" |
eb5d44eb | 18 | #include "if.h" |
19 | #include "network.h" | |
20 | #include "prefix.h" | |
21 | #include "zclient.h" | |
22 | #include "stream.h" | |
23 | #include "linklist.h" | |
f3ccedaa | 24 | #include "nexthop.h" |
7076bb2f | 25 | #include "vrf.h" |
8879bd22 | 26 | #include "libfrr.h" |
13bf3830 | 27 | #include "bfd.h" |
d9884a75 | 28 | #include "link_state.h" |
eb5d44eb | 29 | |
30 | #include "isisd/isis_constants.h" | |
31 | #include "isisd/isis_common.h" | |
3f045a08 JB |
32 | #include "isisd/isis_flags.h" |
33 | #include "isisd/isis_misc.h" | |
34 | #include "isisd/isis_circuit.h" | |
c89c05dd | 35 | #include "isisd/isisd.h" |
eb5d44eb | 36 | #include "isisd/isis_circuit.h" |
37 | #include "isisd/isis_csm.h" | |
3f045a08 | 38 | #include "isisd/isis_lsp.h" |
16fe8cff RW |
39 | #include "isisd/isis_spf.h" |
40 | #include "isisd/isis_spf_private.h" | |
eb5d44eb | 41 | #include "isisd/isis_route.h" |
42 | #include "isisd/isis_zebra.h" | |
c3f7b406 | 43 | #include "isisd/isis_adjacency.h" |
f8c06e2c | 44 | #include "isisd/isis_te.h" |
26f6acaf | 45 | #include "isisd/isis_sr.h" |
1cbf96a8 | 46 | #include "isisd/isis_ldp_sync.h" |
eb5d44eb | 47 | |
26f6acaf RW |
48 | struct zclient *zclient; |
49 | static struct zclient *zclient_sync; | |
50 | ||
18a6dce6 | 51 | /* Router-id update message from zebra. */ |
121f9dee | 52 | static int isis_router_id_update_zebra(ZAPI_CALLBACK_ARGS) |
18a6dce6 | 53 | { |
d62a17ae | 54 | struct isis_area *area; |
55 | struct listnode *node; | |
56 | struct prefix router_id; | |
eab88f36 K |
57 | struct isis *isis = NULL; |
58 | ||
59 | isis = isis_lookup_by_vrfid(vrf_id); | |
60 | ||
61 | if (isis == NULL) { | |
62 | return -1; | |
63 | } | |
d62a17ae | 64 | |
d62a17ae | 65 | zebra_router_id_update_read(zclient->ibuf, &router_id); |
66 | if (isis->router_id == router_id.u.prefix4.s_addr) | |
67 | return 0; | |
68 | ||
69 | isis->router_id = router_id.u.prefix4.s_addr; | |
70 | for (ALL_LIST_ELEMENTS_RO(isis->area_list, node, area)) | |
71 | if (listcount(area->area_addrs) > 0) | |
72 | lsp_regenerate_schedule(area, area->is_type, 0); | |
73 | ||
74 | return 0; | |
18a6dce6 | 75 | } |
eb5d44eb | 76 | |
121f9dee | 77 | static int isis_zebra_if_address_add(ZAPI_CALLBACK_ARGS) |
eb5d44eb | 78 | { |
115f8f56 | 79 | struct isis_circuit *circuit; |
d62a17ae | 80 | struct connected *c; |
eb5d44eb | 81 | |
d62a17ae | 82 | c = zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_ADD, |
83 | zclient->ibuf, vrf_id); | |
f390d2c7 | 84 | |
d62a17ae | 85 | if (c == NULL) |
86 | return 0; | |
f390d2c7 | 87 | |
62f30dcc | 88 | #ifdef EXTREME_DEBUG |
28315916 | 89 | if (c->address->family == AF_INET) |
2dbe669b | 90 | zlog_debug("connected IP address %pFX", c->address); |
28315916 | 91 | if (c->address->family == AF_INET6) |
2dbe669b | 92 | zlog_debug("connected IPv6 address %pFX", c->address); |
eb5d44eb | 93 | #endif /* EXTREME_DEBUG */ |
115f8f56 IR |
94 | |
95 | if (if_is_operative(c->ifp)) { | |
96 | circuit = circuit_scan_by_ifp(c->ifp); | |
97 | if (circuit) | |
98 | isis_circuit_add_addr(circuit, c); | |
99 | } | |
eb5d44eb | 100 | |
d62a17ae | 101 | return 0; |
eb5d44eb | 102 | } |
103 | ||
121f9dee | 104 | static int isis_zebra_if_address_del(ZAPI_CALLBACK_ARGS) |
eb5d44eb | 105 | { |
115f8f56 | 106 | struct isis_circuit *circuit; |
d62a17ae | 107 | struct connected *c; |
eb5d44eb | 108 | |
d62a17ae | 109 | c = zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_DELETE, |
110 | zclient->ibuf, vrf_id); | |
f390d2c7 | 111 | |
d62a17ae | 112 | if (c == NULL) |
113 | return 0; | |
f390d2c7 | 114 | |
f891f443 | 115 | #ifdef EXTREME_DEBUG |
28315916 | 116 | if (c->address->family == AF_INET) |
2dbe669b | 117 | zlog_debug("disconnected IP address %pFX", c->address); |
28315916 | 118 | if (c->address->family == AF_INET6) |
2dbe669b | 119 | zlog_debug("disconnected IPv6 address %pFX", c->address); |
f891f443 | 120 | #endif /* EXTREME_DEBUG */ |
f390d2c7 | 121 | |
115f8f56 IR |
122 | if (if_is_operative(c->ifp)) { |
123 | circuit = circuit_scan_by_ifp(c->ifp); | |
124 | if (circuit) | |
125 | isis_circuit_del_addr(circuit, c); | |
126 | } | |
127 | ||
721c0857 | 128 | connected_free(&c); |
f390d2c7 | 129 | |
d62a17ae | 130 | return 0; |
eb5d44eb | 131 | } |
132 | ||
121f9dee | 133 | static int isis_zebra_link_params(ZAPI_CALLBACK_ARGS) |
f8c06e2c | 134 | { |
d62a17ae | 135 | struct interface *ifp; |
0b4124c1 | 136 | bool changed = false; |
f8c06e2c | 137 | |
0b4124c1 | 138 | ifp = zebra_interface_link_params_read(zclient->ibuf, vrf_id, &changed); |
f8c06e2c | 139 | |
0b4124c1 | 140 | if (ifp == NULL || !changed) |
d62a17ae | 141 | return 0; |
f8c06e2c | 142 | |
d62a17ae | 143 | /* Update TE TLV */ |
144 | isis_mpls_te_update(ifp); | |
f8c06e2c | 145 | |
d62a17ae | 146 | return 0; |
f8c06e2c OD |
147 | } |
148 | ||
c951ee6e | 149 | enum isis_zebra_nexthop_type { |
d47d6089 RW |
150 | ISIS_NEXTHOP_MAIN = 0, |
151 | ISIS_NEXTHOP_BACKUP, | |
c951ee6e RW |
152 | }; |
153 | ||
154 | static int isis_zebra_add_nexthops(struct isis *isis, struct list *nexthops, | |
155 | struct zapi_nexthop zapi_nexthops[], | |
156 | enum isis_zebra_nexthop_type type, | |
d47d6089 | 157 | bool mpls_lsp, uint8_t backup_nhs) |
eb5d44eb | 158 | { |
d62a17ae | 159 | struct isis_nexthop *nexthop; |
160 | struct listnode *node; | |
c0721de4 | 161 | int count = 0; |
d62a17ae | 162 | |
f80dd32b | 163 | /* Nexthops */ |
c951ee6e RW |
164 | for (ALL_LIST_ELEMENTS_RO(nexthops, node, nexthop)) { |
165 | struct zapi_nexthop *api_nh; | |
166 | ||
363be4dd RW |
167 | if (count >= MULTIPATH_NUM) |
168 | break; | |
c951ee6e | 169 | api_nh = &zapi_nexthops[count]; |
363be4dd | 170 | if (fabricd) |
68a02e06 | 171 | SET_FLAG(api_nh->flags, ZAPI_NEXTHOP_FLAG_ONLINK); |
dc18b3b0 | 172 | api_nh->vrf_id = isis->vrf_id; |
363be4dd RW |
173 | |
174 | switch (nexthop->family) { | |
175 | case AF_INET: | |
f80dd32b | 176 | /* FIXME: can it be ? */ |
363be4dd | 177 | if (nexthop->ip.ipv4.s_addr != INADDR_ANY) { |
f80dd32b | 178 | api_nh->type = NEXTHOP_TYPE_IPV4_IFINDEX; |
363be4dd | 179 | api_nh->gate.ipv4 = nexthop->ip.ipv4; |
f80dd32b RW |
180 | } else { |
181 | api_nh->type = NEXTHOP_TYPE_IFINDEX; | |
182 | } | |
363be4dd RW |
183 | break; |
184 | case AF_INET6: | |
185 | if (!IN6_IS_ADDR_LINKLOCAL(&nexthop->ip.ipv6) | |
186 | && !IN6_IS_ADDR_UNSPECIFIED(&nexthop->ip.ipv6)) { | |
f80dd32b RW |
187 | continue; |
188 | } | |
363be4dd | 189 | api_nh->gate.ipv6 = nexthop->ip.ipv6; |
f80dd32b | 190 | api_nh->type = NEXTHOP_TYPE_IPV6_IFINDEX; |
363be4dd RW |
191 | break; |
192 | default: | |
193 | flog_err(EC_LIB_DEVELOPMENT, | |
194 | "%s: unknown address family [%d]", __func__, | |
195 | nexthop->family); | |
196 | exit(1); | |
d62a17ae | 197 | } |
363be4dd RW |
198 | |
199 | api_nh->ifindex = nexthop->ifindex; | |
c951ee6e RW |
200 | |
201 | /* Add MPLS label(s). */ | |
50ec2185 RW |
202 | if (nexthop->label_stack) { |
203 | api_nh->label_num = nexthop->label_stack->num_labels; | |
204 | memcpy(api_nh->labels, nexthop->label_stack->label, | |
205 | sizeof(mpls_label_t) * api_nh->label_num); | |
206 | } else if (nexthop->sr.present) { | |
207 | api_nh->label_num = 1; | |
208 | api_nh->labels[0] = nexthop->sr.label; | |
209 | } else if (mpls_lsp) { | |
210 | switch (type) { | |
211 | case ISIS_NEXTHOP_MAIN: | |
d47d6089 RW |
212 | /* |
213 | * Do not use non-SR enabled nexthops to prevent | |
214 | * broken LSPs from being formed. | |
215 | */ | |
216 | continue; | |
50ec2185 | 217 | case ISIS_NEXTHOP_BACKUP: |
d47d6089 RW |
218 | /* |
219 | * This is necessary because zebra requires | |
220 | * the nexthops of MPLS LSPs to be labeled. | |
221 | */ | |
c951ee6e RW |
222 | api_nh->label_num = 1; |
223 | api_nh->labels[0] = MPLS_LABEL_IMPLICIT_NULL; | |
50ec2185 | 224 | break; |
c951ee6e | 225 | } |
c951ee6e RW |
226 | } |
227 | ||
228 | /* Backup nexthop handling. */ | |
229 | if (backup_nhs) { | |
230 | SET_FLAG(api_nh->flags, ZAPI_NEXTHOP_FLAG_HAS_BACKUP); | |
231 | /* | |
232 | * If the backup has multiple nexthops, all of them | |
233 | * protect the same primary nexthop since ECMP routes | |
234 | * have no backups. | |
235 | */ | |
236 | api_nh->backup_num = backup_nhs; | |
237 | for (int i = 0; i < backup_nhs; i++) | |
238 | api_nh->backup_idx[i] = i; | |
239 | } | |
363be4dd | 240 | count++; |
d62a17ae | 241 | } |
c951ee6e RW |
242 | |
243 | return count; | |
244 | } | |
245 | ||
246 | void isis_zebra_route_add_route(struct isis *isis, struct prefix *prefix, | |
247 | struct prefix_ipv6 *src_p, | |
248 | struct isis_route_info *route_info) | |
249 | { | |
250 | struct zapi_route api; | |
251 | int count = 0; | |
252 | ||
e33b95b4 | 253 | if (zclient->sock < 0) |
c0721de4 | 254 | return; |
f390d2c7 | 255 | |
e33b95b4 RW |
256 | /* Uninstall the route if it doesn't have any valid nexthop. */ |
257 | if (list_isempty(route_info->nexthops)) { | |
258 | isis_zebra_route_del_route(isis, prefix, src_p, route_info); | |
259 | return; | |
260 | } | |
261 | ||
c951ee6e RW |
262 | memset(&api, 0, sizeof(api)); |
263 | api.vrf_id = isis->vrf_id; | |
264 | api.type = PROTO_TYPE; | |
265 | api.safi = SAFI_UNICAST; | |
266 | api.prefix = *prefix; | |
267 | if (src_p && src_p->prefixlen) { | |
268 | api.src_prefix = *src_p; | |
269 | SET_FLAG(api.message, ZAPI_MESSAGE_SRCPFX); | |
270 | } | |
271 | SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP); | |
272 | SET_FLAG(api.message, ZAPI_MESSAGE_METRIC); | |
273 | api.metric = route_info->cost; | |
274 | ||
275 | /* Add backup nexthops first. */ | |
276 | if (route_info->backup) { | |
277 | count = isis_zebra_add_nexthops( | |
278 | isis, route_info->backup->nexthops, api.backup_nexthops, | |
d47d6089 | 279 | ISIS_NEXTHOP_BACKUP, false, 0); |
c951ee6e RW |
280 | if (count > 0) { |
281 | SET_FLAG(api.message, ZAPI_MESSAGE_BACKUP_NEXTHOPS); | |
282 | api.backup_nexthop_num = count; | |
283 | } | |
284 | } | |
285 | ||
286 | /* Add primary nexthops. */ | |
287 | count = isis_zebra_add_nexthops(isis, route_info->nexthops, | |
d47d6089 | 288 | api.nexthops, ISIS_NEXTHOP_MAIN, false, |
c951ee6e RW |
289 | count); |
290 | if (!count) | |
291 | return; | |
c0721de4 | 292 | api.nexthop_num = count; |
f390d2c7 | 293 | |
c0721de4 | 294 | zclient_route_send(ZEBRA_ROUTE_ADD, zclient, &api); |
eb5d44eb | 295 | } |
296 | ||
dc18b3b0 K |
297 | void isis_zebra_route_del_route(struct isis *isis, |
298 | struct prefix *prefix, | |
0a5f3f4f RW |
299 | struct prefix_ipv6 *src_p, |
300 | struct isis_route_info *route_info) | |
eb5d44eb | 301 | { |
c0721de4 | 302 | struct zapi_route api; |
d62a17ae | 303 | |
0a5f3f4f | 304 | if (zclient->sock < 0) |
d62a17ae | 305 | return; |
306 | ||
c0721de4 | 307 | memset(&api, 0, sizeof(api)); |
dc18b3b0 | 308 | api.vrf_id = isis->vrf_id; |
7c0cbd0e | 309 | api.type = PROTO_TYPE; |
d62a17ae | 310 | api.safi = SAFI_UNICAST; |
c0721de4 | 311 | api.prefix = *prefix; |
321c1bbb CF |
312 | if (src_p && src_p->prefixlen) { |
313 | api.src_prefix = *src_p; | |
314 | SET_FLAG(api.message, ZAPI_MESSAGE_SRCPFX); | |
315 | } | |
f390d2c7 | 316 | |
c0721de4 | 317 | zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api); |
eb5d44eb | 318 | } |
319 | ||
f2333421 | 320 | /** |
d47d6089 | 321 | * Install Prefix-SID label entry in the forwarding plane through Zebra. |
f2333421 | 322 | * |
d47d6089 RW |
323 | * @param area IS-IS area |
324 | * @param prefix Route prefix | |
325 | * @param rinfo Route information | |
326 | * @param psid Prefix-SID information | |
f2333421 | 327 | */ |
d47d6089 RW |
328 | void isis_zebra_prefix_sid_install(struct isis_area *area, |
329 | struct prefix *prefix, | |
d47d6089 | 330 | struct isis_sr_psid_info *psid) |
26f6acaf RW |
331 | { |
332 | struct zapi_labels zl; | |
c951ee6e | 333 | int count = 0; |
26f6acaf | 334 | |
7f8dddf4 HS |
335 | sr_debug("ISIS-Sr (%s): update label %u for prefix %pFX algorithm %u", |
336 | area->area_tag, psid->label, prefix, psid->algorithm); | |
d47d6089 | 337 | |
26f6acaf RW |
338 | /* Prepare message. */ |
339 | memset(&zl, 0, sizeof(zl)); | |
340 | zl.type = ZEBRA_LSP_ISIS_SR; | |
d47d6089 RW |
341 | zl.local_label = psid->label; |
342 | ||
343 | /* Local routes don't have any nexthop and require special handling. */ | |
bdaafbf8 | 344 | if (list_isempty(psid->nexthops)) { |
d47d6089 RW |
345 | struct zapi_nexthop *znh; |
346 | struct interface *ifp; | |
26f6acaf | 347 | |
26f6acaf RW |
348 | ifp = if_lookup_by_name("lo", VRF_DEFAULT); |
349 | if (!ifp) { | |
350 | zlog_warn( | |
351 | "%s: couldn't install Prefix-SID %pFX: loopback interface not found", | |
d47d6089 | 352 | __func__, prefix); |
26f6acaf RW |
353 | return; |
354 | } | |
355 | ||
356 | znh = &zl.nexthops[zl.nexthop_num++]; | |
357 | znh->type = NEXTHOP_TYPE_IFINDEX; | |
358 | znh->ifindex = ifp->ifindex; | |
e0e8a84f OD |
359 | znh->label_num = 1; |
360 | znh->labels[0] = MPLS_LABEL_IMPLICIT_NULL; | |
d47d6089 | 361 | } else { |
c951ee6e | 362 | /* Add backup nexthops first. */ |
bdaafbf8 | 363 | if (psid->nexthops_backup) { |
c951ee6e | 364 | count = isis_zebra_add_nexthops( |
bdaafbf8 | 365 | area->isis, psid->nexthops_backup, |
d47d6089 | 366 | zl.backup_nexthops, ISIS_NEXTHOP_BACKUP, true, |
c951ee6e RW |
367 | 0); |
368 | if (count > 0) { | |
369 | SET_FLAG(zl.message, ZAPI_LABELS_HAS_BACKUPS); | |
370 | zl.backup_nexthop_num = count; | |
371 | } | |
26f6acaf | 372 | } |
c951ee6e RW |
373 | |
374 | /* Add primary nexthops. */ | |
bdaafbf8 | 375 | count = isis_zebra_add_nexthops(area->isis, psid->nexthops, |
d47d6089 RW |
376 | zl.nexthops, ISIS_NEXTHOP_MAIN, |
377 | true, count); | |
c951ee6e RW |
378 | if (!count) |
379 | return; | |
380 | zl.nexthop_num = count; | |
26f6acaf RW |
381 | } |
382 | ||
383 | /* Send message to zebra. */ | |
384 | (void)zebra_send_mpls_labels(zclient, ZEBRA_MPLS_LABELS_REPLACE, &zl); | |
385 | } | |
386 | ||
f2333421 | 387 | /** |
d47d6089 | 388 | * Uninstall Prefix-SID label entry from the forwarding plane through Zebra. |
f2333421 | 389 | * |
d47d6089 RW |
390 | * @param area IS-IS area |
391 | * @param prefix Route prefix | |
392 | * @param rinfo Route information | |
393 | * @param psid Prefix-SID information | |
f2333421 | 394 | */ |
d47d6089 RW |
395 | void isis_zebra_prefix_sid_uninstall(struct isis_area *area, |
396 | struct prefix *prefix, | |
397 | struct isis_route_info *rinfo, | |
398 | struct isis_sr_psid_info *psid) | |
26f6acaf RW |
399 | { |
400 | struct zapi_labels zl; | |
401 | ||
7f8dddf4 HS |
402 | sr_debug("ISIS-Sr (%s): delete label %u for prefix %pFX algorithm %u", |
403 | area->area_tag, psid->label, prefix, psid->algorithm); | |
d47d6089 | 404 | |
26f6acaf RW |
405 | /* Prepare message. */ |
406 | memset(&zl, 0, sizeof(zl)); | |
407 | zl.type = ZEBRA_LSP_ISIS_SR; | |
d47d6089 | 408 | zl.local_label = psid->label; |
26f6acaf RW |
409 | |
410 | /* Send message to zebra. */ | |
411 | (void)zebra_send_mpls_labels(zclient, ZEBRA_MPLS_LABELS_DELETE, &zl); | |
412 | } | |
413 | ||
f2333421 OD |
414 | /** |
415 | * Send (LAN)-Adjacency-SID to ZEBRA for installation or deletion. | |
416 | * | |
417 | * @param cmd ZEBRA_MPLS_LABELS_ADD or ZEBRA_ROUTE_DELETE | |
418 | * @param sra Segment Routing Adjacency-SID | |
419 | */ | |
c3f7b406 OD |
420 | void isis_zebra_send_adjacency_sid(int cmd, const struct sr_adjacency *sra) |
421 | { | |
054fda12 | 422 | struct isis *isis = sra->adj->circuit->area->isis; |
c3f7b406 OD |
423 | struct zapi_labels zl; |
424 | struct zapi_nexthop *znh; | |
425 | ||
426 | if (cmd != ZEBRA_MPLS_LABELS_ADD && cmd != ZEBRA_MPLS_LABELS_DELETE) { | |
427 | flog_warn(EC_LIB_DEVELOPMENT, "%s: wrong ZEBRA command", | |
428 | __func__); | |
429 | return; | |
430 | } | |
431 | ||
432 | sr_debug(" |- %s label %u for interface %s", | |
433 | cmd == ZEBRA_MPLS_LABELS_ADD ? "Add" : "Delete", | |
054fda12 | 434 | sra->input_label, sra->adj->circuit->interface->name); |
c3f7b406 OD |
435 | |
436 | memset(&zl, 0, sizeof(zl)); | |
437 | zl.type = ZEBRA_LSP_ISIS_SR; | |
054fda12 | 438 | zl.local_label = sra->input_label; |
c3f7b406 OD |
439 | zl.nexthop_num = 1; |
440 | znh = &zl.nexthops[0]; | |
441 | znh->gate = sra->nexthop.address; | |
442 | znh->type = (sra->nexthop.family == AF_INET) | |
443 | ? NEXTHOP_TYPE_IPV4_IFINDEX | |
444 | : NEXTHOP_TYPE_IPV6_IFINDEX; | |
445 | znh->ifindex = sra->adj->circuit->interface->ifindex; | |
446 | znh->label_num = 1; | |
447 | znh->labels[0] = MPLS_LABEL_IMPLICIT_NULL; | |
448 | ||
054fda12 RW |
449 | /* Set backup nexthops. */ |
450 | if (sra->type == ISIS_SR_LAN_BACKUP) { | |
451 | int count; | |
452 | ||
453 | count = isis_zebra_add_nexthops(isis, sra->backup_nexthops, | |
454 | zl.backup_nexthops, | |
d47d6089 | 455 | ISIS_NEXTHOP_BACKUP, true, 0); |
054fda12 RW |
456 | if (count > 0) { |
457 | SET_FLAG(zl.message, ZAPI_LABELS_HAS_BACKUPS); | |
458 | zl.backup_nexthop_num = count; | |
459 | ||
460 | SET_FLAG(znh->flags, ZAPI_NEXTHOP_FLAG_HAS_BACKUP); | |
461 | znh->backup_num = count; | |
462 | for (int i = 0; i < count; i++) | |
463 | znh->backup_idx[i] = i; | |
464 | } | |
465 | } | |
466 | ||
c3f7b406 OD |
467 | (void)zebra_send_mpls_labels(zclient, cmd, &zl); |
468 | } | |
469 | ||
121f9dee | 470 | static int isis_zebra_read(ZAPI_CALLBACK_ARGS) |
eb5d44eb | 471 | { |
74489921 | 472 | struct zapi_route api; |
eab88f36 K |
473 | struct isis *isis = NULL; |
474 | ||
475 | isis = isis_lookup_by_vrfid(vrf_id); | |
476 | ||
477 | if (isis == NULL) | |
478 | return -1; | |
d62a17ae | 479 | |
74489921 RW |
480 | if (zapi_route_decode(zclient->ibuf, &api) < 0) |
481 | return -1; | |
d62a17ae | 482 | |
9fb2b879 DS |
483 | if (api.prefix.family == AF_INET6 |
484 | && IN6_IS_ADDR_LINKLOCAL(&api.prefix.u.prefix6)) | |
485 | return 0; | |
486 | ||
d62a17ae | 487 | /* |
488 | * Avoid advertising a false default reachability. (A default | |
489 | * route installed by IS-IS gets redistributed from zebra back | |
490 | * into IS-IS causing us to start advertising default reachabity | |
491 | * without this check) | |
492 | */ | |
d43d2df5 CF |
493 | if (api.prefix.prefixlen == 0 |
494 | && api.src_prefix.prefixlen == 0 | |
7c0cbd0e | 495 | && api.type == PROTO_TYPE) { |
121f9dee | 496 | cmd = ZEBRA_REDISTRIBUTE_ROUTE_DEL; |
d43d2df5 | 497 | } |
d62a17ae | 498 | |
121f9dee | 499 | if (cmd == ZEBRA_REDISTRIBUTE_ROUTE_ADD) |
eab88f36 | 500 | isis_redist_add(isis, api.type, &api.prefix, &api.src_prefix, |
3b1e3aab | 501 | api.distance, api.metric, api.tag); |
d62a17ae | 502 | else |
eab88f36 K |
503 | isis_redist_delete(isis, api.type, &api.prefix, |
504 | &api.src_prefix); | |
d62a17ae | 505 | |
506 | return 0; | |
eb5d44eb | 507 | } |
eb5d44eb | 508 | |
d62a17ae | 509 | int isis_distribute_list_update(int routetype) |
eb5d44eb | 510 | { |
d62a17ae | 511 | return 0; |
eb5d44eb | 512 | } |
513 | ||
8c6482db | 514 | void isis_zebra_redistribute_set(afi_t afi, int type, vrf_id_t vrf_id) |
eb5d44eb | 515 | { |
d62a17ae | 516 | if (type == DEFAULT_ROUTE) |
517 | zclient_redistribute_default(ZEBRA_REDISTRIBUTE_DEFAULT_ADD, | |
8c6482db | 518 | zclient, afi, vrf_id); |
d62a17ae | 519 | else |
520 | zclient_redistribute(ZEBRA_REDISTRIBUTE_ADD, zclient, afi, type, | |
8c6482db | 521 | 0, vrf_id); |
f3ccedaa CF |
522 | } |
523 | ||
8c6482db | 524 | void isis_zebra_redistribute_unset(afi_t afi, int type, vrf_id_t vrf_id) |
f3ccedaa | 525 | { |
d62a17ae | 526 | if (type == DEFAULT_ROUTE) |
527 | zclient_redistribute_default(ZEBRA_REDISTRIBUTE_DEFAULT_DELETE, | |
8c6482db | 528 | zclient, afi, vrf_id); |
d62a17ae | 529 | else |
530 | zclient_redistribute(ZEBRA_REDISTRIBUTE_DELETE, zclient, afi, | |
8c6482db | 531 | type, 0, vrf_id); |
eb5d44eb | 532 | } |
533 | ||
16fe8cff RW |
534 | /** |
535 | * Register RLFA with LDP. | |
536 | */ | |
537 | int isis_zebra_rlfa_register(struct isis_spftree *spftree, struct rlfa *rlfa) | |
538 | { | |
539 | struct isis_area *area = spftree->area; | |
540 | struct zapi_rlfa_request zr = {}; | |
541 | int ret; | |
542 | ||
543 | if (!zclient) | |
544 | return 0; | |
545 | ||
546 | zr.igp.vrf_id = area->isis->vrf_id; | |
547 | zr.igp.protocol = ZEBRA_ROUTE_ISIS; | |
548 | strlcpy(zr.igp.isis.area_tag, area->area_tag, | |
549 | sizeof(zr.igp.isis.area_tag)); | |
550 | zr.igp.isis.spf.tree_id = spftree->tree_id; | |
551 | zr.igp.isis.spf.level = spftree->level; | |
552 | zr.igp.isis.spf.run_id = spftree->runcount; | |
553 | zr.destination = rlfa->prefix; | |
554 | zr.pq_address = rlfa->pq_address; | |
555 | ||
556 | zlog_debug("ISIS-LFA: registering RLFA %pFX@%pI4 with LDP", | |
557 | &rlfa->prefix, &rlfa->pq_address); | |
558 | ||
559 | ret = zclient_send_opaque_unicast(zclient, LDP_RLFA_REGISTER, | |
560 | ZEBRA_ROUTE_LDP, 0, 0, | |
561 | (const uint8_t *)&zr, sizeof(zr)); | |
562 | if (ret == ZCLIENT_SEND_FAILURE) { | |
563 | zlog_warn("ISIS-LFA: failed to register RLFA with LDP"); | |
564 | return -1; | |
565 | } | |
566 | ||
567 | return 0; | |
568 | } | |
569 | ||
570 | /** | |
571 | * Unregister all RLFAs from the given SPF tree with LDP. | |
572 | */ | |
573 | void isis_zebra_rlfa_unregister_all(struct isis_spftree *spftree) | |
574 | { | |
575 | struct isis_area *area = spftree->area; | |
576 | struct zapi_rlfa_igp igp = {}; | |
577 | int ret; | |
578 | ||
579 | if (!zclient || spftree->type != SPF_TYPE_FORWARD | |
580 | || CHECK_FLAG(spftree->flags, F_SPFTREE_NO_ADJACENCIES)) | |
581 | return; | |
582 | ||
583 | if (IS_DEBUG_LFA) | |
584 | zlog_debug("ISIS-LFA: unregistering all RLFAs with LDP"); | |
585 | ||
586 | igp.vrf_id = area->isis->vrf_id; | |
587 | igp.protocol = ZEBRA_ROUTE_ISIS; | |
588 | strlcpy(igp.isis.area_tag, area->area_tag, sizeof(igp.isis.area_tag)); | |
589 | igp.isis.spf.tree_id = spftree->tree_id; | |
590 | igp.isis.spf.level = spftree->level; | |
591 | igp.isis.spf.run_id = spftree->runcount; | |
592 | ||
593 | ret = zclient_send_opaque_unicast(zclient, LDP_RLFA_UNREGISTER_ALL, | |
594 | ZEBRA_ROUTE_LDP, 0, 0, | |
595 | (const uint8_t *)&igp, sizeof(igp)); | |
596 | if (ret == ZCLIENT_SEND_FAILURE) | |
597 | zlog_warn("ISIS-LFA: failed to unregister RLFA with LDP"); | |
598 | } | |
599 | ||
774e3570 OD |
600 | /* Label Manager Functions */ |
601 | ||
58fbcdf2 OD |
602 | /** |
603 | * Check if Label Manager is Ready or not. | |
604 | * | |
605 | * @return True if Label Manager is ready, False otherwise | |
606 | */ | |
607 | bool isis_zebra_label_manager_ready(void) | |
608 | { | |
609 | return (zclient_sync->sock > 0); | |
610 | } | |
611 | ||
774e3570 OD |
612 | /** |
613 | * Request Label Range to the Label Manager. | |
614 | * | |
615 | * @param base base label of the label range to request | |
616 | * @param chunk_size size of the label range to request | |
617 | * | |
618 | * @return 0 on success, -1 on failure | |
619 | */ | |
26f6acaf RW |
620 | int isis_zebra_request_label_range(uint32_t base, uint32_t chunk_size) |
621 | { | |
622 | int ret; | |
623 | uint32_t start, end; | |
624 | ||
58fbcdf2 OD |
625 | if (zclient_sync->sock < 0) |
626 | return -1; | |
26f6acaf RW |
627 | |
628 | ret = lm_get_label_chunk(zclient_sync, 0, base, chunk_size, &start, | |
629 | &end); | |
630 | if (ret < 0) { | |
631 | zlog_warn("%s: error getting label range!", __func__); | |
632 | return -1; | |
633 | } | |
634 | ||
635 | return 0; | |
636 | } | |
637 | ||
774e3570 OD |
638 | /** |
639 | * Release Label Range to the Label Manager. | |
640 | * | |
641 | * @param start start of label range to release | |
642 | * @param end end of label range to release | |
774e3570 | 643 | * |
58fbcdf2 | 644 | * @return 0 on success, -1 otherwise |
774e3570 | 645 | */ |
58fbcdf2 | 646 | int isis_zebra_release_label_range(uint32_t start, uint32_t end) |
26f6acaf RW |
647 | { |
648 | int ret; | |
26f6acaf | 649 | |
58fbcdf2 | 650 | if (zclient_sync->sock < 0) |
26f6acaf | 651 | return -1; |
26f6acaf RW |
652 | |
653 | ret = lm_release_label_chunk(zclient_sync, start, end); | |
654 | if (ret < 0) { | |
26f6acaf | 655 | zlog_warn("%s: error releasing label range!", __func__); |
26f6acaf RW |
656 | return -1; |
657 | } | |
658 | ||
659 | return 0; | |
660 | } | |
661 | ||
774e3570 OD |
662 | /** |
663 | * Connect to the Label Manager. | |
58fbcdf2 OD |
664 | * |
665 | * @return 0 on success, -1 otherwise | |
774e3570 | 666 | */ |
58fbcdf2 | 667 | int isis_zebra_label_manager_connect(void) |
26f6acaf RW |
668 | { |
669 | /* Connect to label manager. */ | |
58fbcdf2 OD |
670 | if (zclient_socket_connect(zclient_sync) < 0) { |
671 | zlog_warn("%s: failed connecting synchronous zclient!", | |
26f6acaf | 672 | __func__); |
58fbcdf2 | 673 | return -1; |
26f6acaf | 674 | } |
774e3570 | 675 | /* make socket non-blocking */ |
26f6acaf | 676 | set_nonblocking(zclient_sync->sock); |
774e3570 OD |
677 | |
678 | /* Send hello to notify zebra this is a synchronous client */ | |
7cfdb485 | 679 | if (zclient_send_hello(zclient_sync) == ZCLIENT_SEND_FAILURE) { |
58fbcdf2 OD |
680 | zlog_warn("%s: failed sending hello for synchronous zclient!", |
681 | __func__); | |
682 | close(zclient_sync->sock); | |
683 | zclient_sync->sock = -1; | |
684 | return -1; | |
774e3570 OD |
685 | } |
686 | ||
687 | /* Connect to label manager */ | |
58fbcdf2 OD |
688 | if (lm_label_manager_connect(zclient_sync, 0) != 0) { |
689 | zlog_warn("%s: failed connecting to label manager!", __func__); | |
690 | if (zclient_sync->sock > 0) { | |
691 | close(zclient_sync->sock); | |
692 | zclient_sync->sock = -1; | |
693 | } | |
694 | return -1; | |
26f6acaf RW |
695 | } |
696 | ||
58fbcdf2 OD |
697 | sr_debug("ISIS-Sr: Successfully connected to the Label Manager"); |
698 | ||
699 | return 0; | |
26f6acaf RW |
700 | } |
701 | ||
65251ce8 | 702 | void isis_zebra_vrf_register(struct isis *isis) |
703 | { | |
704 | if (!zclient || zclient->sock < 0 || !isis) | |
705 | return; | |
706 | ||
707 | if (isis->vrf_id != VRF_UNKNOWN) { | |
708 | if (IS_DEBUG_EVENTS) | |
709 | zlog_debug("%s: Register VRF %s id %u", __func__, | |
710 | isis->name, isis->vrf_id); | |
711 | zclient_send_reg_requests(zclient, isis->vrf_id); | |
712 | } | |
713 | } | |
714 | ||
164ab896 IR |
715 | void isis_zebra_vrf_deregister(struct isis *isis) |
716 | { | |
717 | if (!zclient || zclient->sock < 0 || !isis) | |
718 | return; | |
719 | ||
720 | if (isis->vrf_id != VRF_UNKNOWN) { | |
721 | if (IS_DEBUG_EVENTS) | |
722 | zlog_debug("%s: Deregister VRF %s id %u", __func__, | |
723 | isis->name, isis->vrf_id); | |
724 | zclient_send_dereg_requests(zclient, isis->vrf_id); | |
725 | } | |
726 | } | |
65251ce8 | 727 | |
d62a17ae | 728 | static void isis_zebra_connected(struct zclient *zclient) |
7076bb2f | 729 | { |
d62a17ae | 730 | zclient_send_reg_requests(zclient, VRF_DEFAULT); |
16fe8cff | 731 | zclient_register_opaque(zclient, LDP_RLFA_LABELS); |
ec62fbaa IR |
732 | zclient_register_opaque(zclient, LDP_IGP_SYNC_IF_STATE_UPDATE); |
733 | zclient_register_opaque(zclient, LDP_IGP_SYNC_ANNOUNCE_UPDATE); | |
13bf3830 | 734 | bfd_client_sendmsg(zclient, ZEBRA_BFD_CLIENT_REGISTER, VRF_DEFAULT); |
7076bb2f FL |
735 | } |
736 | ||
d9884a75 OD |
737 | /** |
738 | * Register / unregister Link State ZAPI Opaque Message | |
739 | * | |
740 | * @param up True to register, false to unregister | |
741 | * | |
742 | * @return 0 if success, -1 otherwise | |
743 | */ | |
744 | int isis_zebra_ls_register(bool up) | |
745 | { | |
746 | int rc; | |
747 | ||
748 | if (up) | |
749 | rc = ls_register(zclient, true); | |
750 | else | |
751 | rc = ls_unregister(zclient, true); | |
752 | ||
753 | return rc; | |
754 | } | |
755 | ||
1cbf96a8 | 756 | /* |
757 | * opaque messages between processes | |
758 | */ | |
759 | static int isis_opaque_msg_handler(ZAPI_CALLBACK_ARGS) | |
760 | { | |
761 | struct stream *s; | |
762 | struct zapi_opaque_msg info; | |
d9884a75 | 763 | struct zapi_opaque_reg_info dst; |
1cbf96a8 | 764 | struct ldp_igp_sync_if_state state; |
765 | struct ldp_igp_sync_announce announce; | |
16fe8cff | 766 | struct zapi_rlfa_response rlfa; |
1cbf96a8 | 767 | int ret = 0; |
768 | ||
769 | s = zclient->ibuf; | |
770 | if (zclient_opaque_decode(s, &info) != 0) | |
771 | return -1; | |
772 | ||
773 | switch (info.type) { | |
d9884a75 OD |
774 | case LINK_STATE_SYNC: |
775 | STREAM_GETC(s, dst.proto); | |
776 | STREAM_GETW(s, dst.instance); | |
777 | STREAM_GETL(s, dst.session_id); | |
778 | dst.type = LINK_STATE_SYNC; | |
779 | ret = isis_te_sync_ted(dst); | |
780 | break; | |
1cbf96a8 | 781 | case LDP_IGP_SYNC_IF_STATE_UPDATE: |
782 | STREAM_GET(&state, s, sizeof(state)); | |
783 | ret = isis_ldp_sync_state_update(state); | |
784 | break; | |
785 | case LDP_IGP_SYNC_ANNOUNCE_UPDATE: | |
786 | STREAM_GET(&announce, s, sizeof(announce)); | |
787 | ret = isis_ldp_sync_announce_update(announce); | |
788 | break; | |
16fe8cff RW |
789 | case LDP_RLFA_LABELS: |
790 | STREAM_GET(&rlfa, s, sizeof(rlfa)); | |
791 | isis_rlfa_process_ldp_response(&rlfa); | |
792 | break; | |
1cbf96a8 | 793 | default: |
794 | break; | |
795 | } | |
796 | ||
797 | stream_failure: | |
798 | ||
799 | return ret; | |
800 | } | |
801 | ||
cb135cc9 KS |
802 | static int isis_zebra_client_close_notify(ZAPI_CALLBACK_ARGS) |
803 | { | |
804 | int ret = 0; | |
805 | ||
806 | struct zapi_client_close_info info; | |
807 | ||
808 | if (zapi_client_close_notify_decode(zclient->ibuf, &info) < 0) | |
809 | return -1; | |
810 | ||
811 | isis_ldp_sync_handle_client_close(&info); | |
16fe8cff | 812 | isis_ldp_rlfa_handle_client_close(&info); |
cb135cc9 KS |
813 | |
814 | return ret; | |
815 | } | |
816 | ||
a243d1db DL |
817 | static zclient_handler *const isis_handlers[] = { |
818 | [ZEBRA_ROUTER_ID_UPDATE] = isis_router_id_update_zebra, | |
819 | [ZEBRA_INTERFACE_ADDRESS_ADD] = isis_zebra_if_address_add, | |
820 | [ZEBRA_INTERFACE_ADDRESS_DELETE] = isis_zebra_if_address_del, | |
821 | [ZEBRA_INTERFACE_LINK_PARAMS] = isis_zebra_link_params, | |
822 | [ZEBRA_REDISTRIBUTE_ROUTE_ADD] = isis_zebra_read, | |
823 | [ZEBRA_REDISTRIBUTE_ROUTE_DEL] = isis_zebra_read, | |
824 | ||
825 | [ZEBRA_OPAQUE_MESSAGE] = isis_opaque_msg_handler, | |
826 | ||
827 | [ZEBRA_CLIENT_CLOSE_NOTIFY] = isis_zebra_client_close_notify, | |
828 | }; | |
829 | ||
cd9d0537 | 830 | void isis_zebra_init(struct event_loop *master, int instance) |
eb5d44eb | 831 | { |
26f6acaf | 832 | /* Initialize asynchronous zclient. */ |
a243d1db DL |
833 | zclient = zclient_new(master, &zclient_options_default, isis_handlers, |
834 | array_size(isis_handlers)); | |
7c0cbd0e | 835 | zclient_init(zclient, PROTO_TYPE, 0, &isisd_privs); |
d62a17ae | 836 | zclient->zebra_connected = isis_zebra_connected; |
d62a17ae | 837 | |
26f6acaf | 838 | /* Initialize special zclient for synchronous message exchanges. */ |
774e3570 OD |
839 | struct zclient_options options = zclient_options_default; |
840 | options.synchronous = true; | |
a243d1db | 841 | zclient_sync = zclient_new(master, &options, NULL, 0); |
26f6acaf RW |
842 | zclient_sync->sock = -1; |
843 | zclient_sync->redist_default = ZEBRA_ROUTE_ISIS; | |
844 | zclient_sync->instance = instance; | |
774e3570 OD |
845 | /* |
846 | * session_id must be different from default value (0) to distinguish | |
847 | * the asynchronous socket from the synchronous one | |
848 | */ | |
849 | zclient_sync->session_id = 1; | |
26f6acaf | 850 | zclient_sync->privs = &isisd_privs; |
eb5d44eb | 851 | } |
8d429559 | 852 | |
d62a17ae | 853 | void isis_zebra_stop(void) |
8d429559 | 854 | { |
16fe8cff | 855 | zclient_unregister_opaque(zclient, LDP_RLFA_LABELS); |
ec62fbaa IR |
856 | zclient_unregister_opaque(zclient, LDP_IGP_SYNC_IF_STATE_UPDATE); |
857 | zclient_unregister_opaque(zclient, LDP_IGP_SYNC_ANNOUNCE_UPDATE); | |
58fbcdf2 OD |
858 | zclient_stop(zclient_sync); |
859 | zclient_free(zclient_sync); | |
d62a17ae | 860 | zclient_stop(zclient); |
861 | zclient_free(zclient); | |
8879bd22 | 862 | frr_fini(); |
8d429559 | 863 | } |