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7e24fdf3 DS |
1 | /* |
2 | * Zebra connect code. | |
3 | * Copyright (C) 2018 Cumulus Networks, Inc. | |
4 | * Donald Sharp | |
5 | * | |
8d5cbee9 DS |
6 | * This program is free software; you can redistribute it and/or modify it |
7 | * under the terms of the GNU General Public License as published by the Free | |
8 | * Software Foundation; either version 2 of the License, or (at your option) | |
9 | * any later version. | |
7e24fdf3 | 10 | * |
8d5cbee9 DS |
11 | * This program is distributed in the hope that it will be useful, but WITHOUT |
12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
14 | * more details. | |
7e24fdf3 DS |
15 | * |
16 | * You should have received a copy of the GNU General Public License along | |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | #include <zebra.h> | |
21 | ||
22 | #include "thread.h" | |
23 | #include "command.h" | |
24 | #include "network.h" | |
25 | #include "prefix.h" | |
26 | #include "routemap.h" | |
27 | #include "table.h" | |
28 | #include "srcdest_table.h" | |
29 | #include "stream.h" | |
30 | #include "memory.h" | |
31 | #include "zclient.h" | |
32 | #include "filter.h" | |
33 | #include "plist.h" | |
34 | #include "log.h" | |
35 | #include "nexthop.h" | |
36 | #include "nexthop_group.h" | |
74f0a94e | 37 | #include "hash.h" |
f591b309 | 38 | #include "jhash.h" |
7e24fdf3 DS |
39 | |
40 | #include "static_vrf.h" | |
41 | #include "static_routes.h" | |
42 | #include "static_zebra.h" | |
43 | #include "static_nht.h" | |
44 | #include "static_vty.h" | |
45 | ||
46 | /* Zebra structure to hold current status. */ | |
47 | struct zclient *zclient; | |
74f0a94e | 48 | static struct hash *static_nht_hash; |
7e24fdf3 DS |
49 | |
50 | static struct interface *zebra_interface_if_lookup(struct stream *s) | |
51 | { | |
52 | char ifname_tmp[INTERFACE_NAMSIZ]; | |
53 | ||
54 | /* Read interface name. */ | |
55 | stream_get(ifname_tmp, s, INTERFACE_NAMSIZ); | |
56 | ||
57 | /* And look it up. */ | |
58 | return if_lookup_by_name(ifname_tmp, VRF_DEFAULT); | |
59 | } | |
60 | ||
61 | /* Inteface addition message from zebra. */ | |
62 | static int interface_add(int command, struct zclient *zclient, | |
63 | zebra_size_t length, vrf_id_t vrf_id) | |
64 | { | |
65 | struct interface *ifp; | |
66 | ||
67 | ifp = zebra_interface_add_read(zclient->ibuf, vrf_id); | |
68 | ||
69 | if (!ifp) | |
70 | return 0; | |
71 | ||
72 | static_ifindex_update(ifp, true); | |
73 | return 0; | |
74 | } | |
75 | ||
76 | static int interface_delete(int command, struct zclient *zclient, | |
77 | zebra_size_t length, vrf_id_t vrf_id) | |
78 | { | |
79 | struct interface *ifp; | |
80 | struct stream *s; | |
81 | ||
82 | s = zclient->ibuf; | |
83 | /* zebra_interface_state_read () updates interface structure in iflist | |
84 | */ | |
85 | ifp = zebra_interface_state_read(s, vrf_id); | |
86 | ||
87 | if (ifp == NULL) | |
88 | return 0; | |
89 | ||
90 | if_set_index(ifp, IFINDEX_INTERNAL); | |
91 | ||
92 | static_ifindex_update(ifp, false); | |
93 | return 0; | |
94 | } | |
95 | ||
96 | static int interface_address_add(int command, struct zclient *zclient, | |
97 | zebra_size_t length, vrf_id_t vrf_id) | |
98 | { | |
99 | zebra_interface_address_read(command, zclient->ibuf, vrf_id); | |
100 | ||
101 | return 0; | |
102 | } | |
103 | ||
104 | static int interface_address_delete(int command, struct zclient *zclient, | |
105 | zebra_size_t length, vrf_id_t vrf_id) | |
106 | { | |
107 | struct connected *c; | |
108 | ||
109 | c = zebra_interface_address_read(command, zclient->ibuf, vrf_id); | |
110 | ||
111 | if (!c) | |
112 | return 0; | |
113 | ||
114 | connected_free(c); | |
115 | return 0; | |
116 | } | |
117 | ||
118 | static int interface_state_up(int command, struct zclient *zclient, | |
119 | zebra_size_t length, vrf_id_t vrf_id) | |
120 | { | |
121 | struct interface *ifp; | |
122 | ||
123 | ifp = zebra_interface_if_lookup(zclient->ibuf); | |
124 | ||
a9be49bc DS |
125 | if (ifp) { |
126 | if (if_is_vrf(ifp)) { | |
127 | struct static_vrf *svrf = | |
128 | static_vrf_lookup_by_id(vrf_id); | |
7e24fdf3 | 129 | |
a9be49bc DS |
130 | static_fixup_vrf_ids(svrf); |
131 | static_config_install_delayed_routes(svrf); | |
132 | } | |
133 | ||
134 | /* Install any static reliant on this interface coming up */ | |
135 | static_install_intf_nh(ifp); | |
7e24fdf3 DS |
136 | } |
137 | ||
138 | return 0; | |
139 | } | |
140 | ||
141 | static int interface_state_down(int command, struct zclient *zclient, | |
142 | zebra_size_t length, vrf_id_t vrf_id) | |
143 | { | |
144 | zebra_interface_state_read(zclient->ibuf, vrf_id); | |
145 | ||
146 | return 0; | |
147 | } | |
148 | ||
149 | static int route_notify_owner(int command, struct zclient *zclient, | |
150 | zebra_size_t length, vrf_id_t vrf_id) | |
151 | { | |
152 | struct prefix p; | |
153 | enum zapi_route_notify_owner note; | |
154 | uint32_t table_id; | |
155 | char buf[PREFIX_STRLEN]; | |
156 | ||
157 | prefix2str(&p, buf, sizeof(buf)); | |
158 | ||
159 | if (!zapi_route_notify_decode(zclient->ibuf, &p, &table_id, ¬e)) | |
160 | return -1; | |
161 | ||
162 | switch (note) { | |
163 | case ZAPI_ROUTE_FAIL_INSTALL: | |
164 | zlog_warn("%s: Route %s failed to install for table: %u", | |
165 | __PRETTY_FUNCTION__, buf, table_id); | |
166 | break; | |
167 | case ZAPI_ROUTE_BETTER_ADMIN_WON: | |
168 | zlog_warn("%s: Route %s over-ridden by better route for table: %u", | |
169 | __PRETTY_FUNCTION__, buf, table_id); | |
170 | break; | |
171 | case ZAPI_ROUTE_INSTALLED: | |
172 | break; | |
173 | case ZAPI_ROUTE_REMOVED: | |
174 | break; | |
175 | case ZAPI_ROUTE_REMOVE_FAIL: | |
176 | zlog_warn("%s: Route %s failure to remove for table: %u", | |
177 | __PRETTY_FUNCTION__, buf, table_id); | |
178 | break; | |
179 | } | |
180 | ||
181 | return 0; | |
182 | } | |
183 | static void zebra_connected(struct zclient *zclient) | |
184 | { | |
185 | zclient_send_reg_requests(zclient, VRF_DEFAULT); | |
186 | } | |
187 | ||
74f0a94e DS |
188 | struct static_nht_data { |
189 | struct prefix *nh; | |
f591b309 DS |
190 | |
191 | vrf_id_t nh_vrf_id; | |
192 | ||
74f0a94e DS |
193 | uint32_t refcount; |
194 | uint8_t nh_num; | |
195 | }; | |
7e24fdf3 DS |
196 | |
197 | static int static_zebra_nexthop_update(int command, struct zclient *zclient, | |
198 | zebra_size_t length, vrf_id_t vrf_id) | |
199 | { | |
74f0a94e | 200 | struct static_nht_data *nhtd, lookup; |
7e24fdf3 DS |
201 | struct zapi_route nhr; |
202 | afi_t afi = AFI_IP; | |
203 | ||
204 | if (!zapi_nexthop_update_decode(zclient->ibuf, &nhr)) { | |
205 | zlog_warn("Failure to decode nexthop update message"); | |
206 | return 1; | |
207 | } | |
208 | ||
209 | if (nhr.prefix.family == AF_INET6) | |
210 | afi = AFI_IP6; | |
211 | ||
74f0a94e DS |
212 | memset(&lookup, 0, sizeof(lookup)); |
213 | lookup.nh = &nhr.prefix; | |
f591b309 | 214 | lookup.nh_vrf_id = vrf_id; |
74f0a94e DS |
215 | |
216 | nhtd = hash_lookup(static_nht_hash, &lookup); | |
f591b309 DS |
217 | |
218 | if (nhtd) { | |
74f0a94e DS |
219 | nhtd->nh_num = nhr.nexthop_num; |
220 | ||
f591b309 DS |
221 | static_nht_update(&nhr.prefix, nhr.nexthop_num, afi, |
222 | nhtd->nh_vrf_id); | |
223 | } else | |
224 | zlog_err("No nhtd?"); | |
74f0a94e | 225 | |
7e24fdf3 DS |
226 | return 1; |
227 | } | |
228 | ||
229 | static void static_zebra_capabilities(struct zclient_capabilities *cap) | |
230 | { | |
231 | mpls_enabled = cap->mpls_enabled; | |
232 | } | |
233 | ||
74f0a94e DS |
234 | static unsigned int static_nht_hash_key(void *data) |
235 | { | |
236 | struct static_nht_data *nhtd = data; | |
f591b309 | 237 | unsigned int key = 0; |
74f0a94e | 238 | |
f591b309 DS |
239 | key = prefix_hash_key(nhtd->nh); |
240 | return jhash_1word(nhtd->nh_vrf_id, key); | |
74f0a94e DS |
241 | } |
242 | ||
74df8d6d | 243 | static bool static_nht_hash_cmp(const void *d1, const void *d2) |
74f0a94e DS |
244 | { |
245 | const struct static_nht_data *nhtd1 = d1; | |
246 | const struct static_nht_data *nhtd2 = d2; | |
247 | ||
f591b309 | 248 | if (nhtd1->nh_vrf_id != nhtd2->nh_vrf_id) |
74df8d6d | 249 | return false; |
f591b309 | 250 | |
74f0a94e DS |
251 | return prefix_same(nhtd1->nh, nhtd2->nh); |
252 | } | |
253 | ||
254 | static void *static_nht_hash_alloc(void *data) | |
255 | { | |
256 | struct static_nht_data *copy = data; | |
257 | struct static_nht_data *new; | |
258 | ||
259 | new = XMALLOC(MTYPE_TMP, sizeof(*new)); | |
260 | ||
261 | new->nh = prefix_new(); | |
262 | prefix_copy(new->nh, copy->nh); | |
263 | new->refcount = 0; | |
264 | new->nh_num = 0; | |
f591b309 | 265 | new->nh_vrf_id = copy->nh_vrf_id; |
74f0a94e DS |
266 | |
267 | return new; | |
268 | } | |
269 | ||
270 | static void static_nht_hash_free(void *data) | |
271 | { | |
272 | struct static_nht_data *nhtd = data; | |
273 | ||
274 | prefix_free(nhtd->nh); | |
275 | XFREE(MTYPE_TMP, nhtd); | |
276 | } | |
277 | ||
7e24fdf3 DS |
278 | void static_zebra_nht_register(struct static_route *si, bool reg) |
279 | { | |
74f0a94e | 280 | struct static_nht_data *nhtd, lookup; |
7e24fdf3 DS |
281 | uint32_t cmd; |
282 | struct prefix p; | |
74f0a94e | 283 | afi_t afi = AFI_IP; |
7e24fdf3 DS |
284 | |
285 | cmd = (reg) ? | |
286 | ZEBRA_NEXTHOP_REGISTER : ZEBRA_NEXTHOP_UNREGISTER; | |
287 | ||
288 | if (si->nh_registered && reg) | |
289 | return; | |
290 | ||
291 | if (!si->nh_registered && !reg) | |
292 | return; | |
293 | ||
294 | memset(&p, 0, sizeof(p)); | |
295 | switch (si->type) { | |
7e24fdf3 DS |
296 | case STATIC_IFNAME: |
297 | case STATIC_BLACKHOLE: | |
7e24fdf3 DS |
298 | return; |
299 | case STATIC_IPV4_GATEWAY: | |
88a90016 | 300 | case STATIC_IPV4_GATEWAY_IFNAME: |
7e24fdf3 DS |
301 | p.family = AF_INET; |
302 | p.prefixlen = IPV4_MAX_BITLEN; | |
303 | p.u.prefix4 = si->addr.ipv4; | |
74f0a94e | 304 | afi = AFI_IP; |
7e24fdf3 DS |
305 | break; |
306 | case STATIC_IPV6_GATEWAY: | |
88a90016 | 307 | case STATIC_IPV6_GATEWAY_IFNAME: |
7e24fdf3 DS |
308 | p.family = AF_INET6; |
309 | p.prefixlen = IPV6_MAX_BITLEN; | |
310 | p.u.prefix6 = si->addr.ipv6; | |
74f0a94e | 311 | afi = AFI_IP6; |
7e24fdf3 DS |
312 | break; |
313 | } | |
314 | ||
74f0a94e DS |
315 | memset(&lookup, 0, sizeof(lookup)); |
316 | lookup.nh = &p; | |
f591b309 | 317 | lookup.nh_vrf_id = si->nh_vrf_id; |
74f0a94e DS |
318 | |
319 | si->nh_registered = reg; | |
320 | ||
321 | if (reg) { | |
322 | nhtd = hash_get(static_nht_hash, &lookup, | |
323 | static_nht_hash_alloc); | |
324 | nhtd->refcount++; | |
325 | ||
326 | if (nhtd->refcount > 1) { | |
327 | static_nht_update(nhtd->nh, nhtd->nh_num, | |
328 | afi, si->nh_vrf_id); | |
329 | return; | |
330 | } | |
331 | } else { | |
332 | nhtd = hash_lookup(static_nht_hash, &lookup); | |
333 | if (!nhtd) | |
334 | return; | |
335 | ||
336 | nhtd->refcount--; | |
337 | if (nhtd->refcount >= 1) | |
338 | return; | |
339 | ||
340 | hash_release(static_nht_hash, nhtd); | |
341 | static_nht_hash_free(nhtd); | |
342 | } | |
343 | ||
7e24fdf3 DS |
344 | if (zclient_send_rnh(zclient, cmd, &p, false, si->nh_vrf_id) < 0) |
345 | zlog_warn("%s: Failure to send nexthop to zebra", | |
346 | __PRETTY_FUNCTION__); | |
7e24fdf3 DS |
347 | } |
348 | ||
8bc8de2c DS |
349 | extern void static_zebra_route_add(struct route_node *rn, |
350 | struct static_route *si_changed, | |
351 | vrf_id_t vrf_id, safi_t safi, bool install) | |
7e24fdf3 DS |
352 | { |
353 | struct static_route *si = rn->info; | |
354 | const struct prefix *p, *src_pp; | |
355 | struct zapi_nexthop *api_nh; | |
356 | struct zapi_route api; | |
357 | uint32_t nh_num = 0; | |
358 | ||
359 | p = src_pp = NULL; | |
360 | srcdest_rnode_prefixes(rn, &p, &src_pp); | |
361 | ||
362 | memset(&api, 0, sizeof(api)); | |
363 | api.vrf_id = vrf_id; | |
364 | api.type = ZEBRA_ROUTE_STATIC; | |
365 | api.safi = safi; | |
366 | memcpy(&api.prefix, p, sizeof(api.prefix)); | |
367 | ||
368 | if (src_pp) { | |
369 | SET_FLAG(api.message, ZAPI_MESSAGE_SRCPFX); | |
370 | memcpy(&api.src_prefix, src_pp, sizeof(api.src_prefix)); | |
371 | } | |
8bc8de2c | 372 | SET_FLAG(api.flags, ZEBRA_FLAG_RR_USE_DISTANCE); |
02dc8ba3 QY |
373 | if (si_changed->onlink) |
374 | SET_FLAG(api.flags, ZEBRA_FLAG_ONLINK); | |
7e24fdf3 | 375 | SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP); |
8bc8de2c DS |
376 | if (si_changed->distance) { |
377 | SET_FLAG(api.message, ZAPI_MESSAGE_DISTANCE); | |
378 | api.distance = si_changed->distance; | |
379 | } | |
380 | if (si_changed->tag) { | |
381 | SET_FLAG(api.message, ZAPI_MESSAGE_TAG); | |
382 | api.tag = si_changed->tag; | |
383 | } | |
31d4a8e5 PG |
384 | if (si_changed->table_id != 0) { |
385 | SET_FLAG(api.message, ZAPI_MESSAGE_TABLEID); | |
386 | api.tableid = si_changed->table_id; | |
387 | } | |
7e24fdf3 DS |
388 | for (/*loaded above*/; si; si = si->next) { |
389 | api_nh = &api.nexthops[nh_num]; | |
390 | if (si->nh_vrf_id == VRF_UNKNOWN) | |
391 | continue; | |
392 | ||
8bc8de2c DS |
393 | if (si->distance != si_changed->distance) |
394 | continue; | |
7e24fdf3 | 395 | |
95cdbe5d DS |
396 | if (si->table_id != si_changed->table_id) |
397 | continue; | |
398 | ||
7e24fdf3 DS |
399 | api_nh->vrf_id = si->nh_vrf_id; |
400 | switch (si->type) { | |
401 | case STATIC_IFNAME: | |
402 | if (si->ifindex == IFINDEX_INTERNAL) | |
403 | continue; | |
404 | api_nh->ifindex = si->ifindex; | |
405 | api_nh->type = NEXTHOP_TYPE_IFINDEX; | |
406 | break; | |
407 | case STATIC_IPV4_GATEWAY: | |
408 | if (!si->nh_valid) | |
409 | continue; | |
410 | api_nh->type = NEXTHOP_TYPE_IPV4; | |
411 | api_nh->gate = si->addr; | |
412 | break; | |
413 | case STATIC_IPV4_GATEWAY_IFNAME: | |
414 | if (si->ifindex == IFINDEX_INTERNAL) | |
415 | continue; | |
416 | api_nh->ifindex = si->ifindex; | |
417 | api_nh->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
418 | api_nh->gate = si->addr; | |
419 | break; | |
420 | case STATIC_IPV6_GATEWAY: | |
421 | if (!si->nh_valid) | |
422 | continue; | |
423 | api_nh->type = NEXTHOP_TYPE_IPV6; | |
424 | api_nh->gate = si->addr; | |
425 | break; | |
426 | case STATIC_IPV6_GATEWAY_IFNAME: | |
427 | if (si->ifindex == IFINDEX_INTERNAL) | |
428 | continue; | |
429 | api_nh->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
430 | api_nh->ifindex = si->ifindex; | |
431 | api_nh->gate = si->addr; | |
432 | break; | |
433 | case STATIC_BLACKHOLE: | |
434 | api_nh->type = NEXTHOP_TYPE_BLACKHOLE; | |
435 | switch (si->bh_type) { | |
436 | case STATIC_BLACKHOLE_DROP: | |
437 | case STATIC_BLACKHOLE_NULL: | |
438 | api_nh->bh_type = BLACKHOLE_NULL; | |
439 | break; | |
440 | case STATIC_BLACKHOLE_REJECT: | |
441 | api_nh->bh_type = BLACKHOLE_REJECT; | |
442 | } | |
443 | break; | |
444 | } | |
445 | ||
446 | if (si->snh_label.num_labels) { | |
447 | int i; | |
448 | ||
449 | SET_FLAG(api.message, ZAPI_MESSAGE_LABEL); | |
450 | api_nh->label_num = si->snh_label.num_labels; | |
451 | for (i = 0; i < api_nh->label_num; i++) | |
452 | api_nh->labels[i] = si->snh_label.label[i]; | |
453 | } | |
454 | nh_num++; | |
455 | } | |
456 | ||
457 | api.nexthop_num = nh_num; | |
458 | ||
459 | /* | |
460 | * If we have been given an install but nothing is valid | |
461 | * go ahead and delete the route for double plus fun | |
462 | */ | |
463 | if (!nh_num && install) | |
464 | install = false; | |
465 | ||
466 | zclient_route_send(install ? | |
467 | ZEBRA_ROUTE_ADD : ZEBRA_ROUTE_DELETE, | |
468 | zclient, &api); | |
469 | } | |
470 | void static_zebra_init(void) | |
471 | { | |
472 | struct zclient_options opt = { .receive_notify = true }; | |
473 | ||
26f63a1e | 474 | zclient = zclient_new(master, &opt); |
7e24fdf3 DS |
475 | |
476 | zclient_init(zclient, ZEBRA_ROUTE_STATIC, 0, &static_privs); | |
477 | zclient->zebra_capabilities = static_zebra_capabilities; | |
478 | zclient->zebra_connected = zebra_connected; | |
479 | zclient->interface_add = interface_add; | |
480 | zclient->interface_delete = interface_delete; | |
481 | zclient->interface_up = interface_state_up; | |
482 | zclient->interface_down = interface_state_down; | |
483 | zclient->interface_address_add = interface_address_add; | |
484 | zclient->interface_address_delete = interface_address_delete; | |
485 | zclient->route_notify_owner = route_notify_owner; | |
486 | zclient->nexthop_update = static_zebra_nexthop_update; | |
74f0a94e DS |
487 | |
488 | static_nht_hash = hash_create(static_nht_hash_key, | |
489 | static_nht_hash_cmp, | |
490 | "Static Nexthop Tracking hash"); | |
7e24fdf3 | 491 | } |