]>
Commit | Line | Data |
---|---|---|
7ef5a232 | 1 | /* Ethernet-VPN Packet and vty Processing File |
896014f4 | 2 | * Copyright (C) 2016 6WIND |
128ea8ab | 3 | * Copyright (C) 2017 Cumulus Networks, Inc. |
896014f4 | 4 | * |
128ea8ab | 5 | * This file is part of FRR. |
896014f4 DL |
6 | * |
7 | * FRRouting is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2, or (at your option) any | |
10 | * later version. | |
11 | * | |
12 | * FRRouting is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License along | |
18 | * with this program; see the file COPYING; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
7ef5a232 | 21 | |
7ef5a232 PG |
22 | #include <zebra.h> |
23 | ||
24 | #include "command.h" | |
25 | #include "filter.h" | |
26 | #include "prefix.h" | |
27 | #include "log.h" | |
28 | #include "memory.h" | |
29 | #include "stream.h" | |
14c1a7bf | 30 | #include "hash.h" |
31 | #include "jhash.h" | |
32 | #include "bitfield.h" | |
128ea8ab | 33 | #include "zclient.h" |
7ef5a232 PG |
34 | |
35 | #include "bgpd/bgp_attr_evpn.h" | |
36 | #include "bgpd/bgpd.h" | |
37 | #include "bgpd/bgp_table.h" | |
38 | #include "bgpd/bgp_route.h" | |
39 | #include "bgpd/bgp_attr.h" | |
40 | #include "bgpd/bgp_mplsvpn.h" | |
9bedbb1e | 41 | #include "bgpd/bgp_label.h" |
7ef5a232 | 42 | #include "bgpd/bgp_evpn.h" |
14c1a7bf | 43 | #include "bgpd/bgp_evpn_private.h" |
44 | #include "bgpd/bgp_ecommunity.h" | |
128ea8ab | 45 | #include "bgpd/bgp_encap_types.h" |
46 | #include "bgpd/bgp_debug.h" | |
47 | #include "bgpd/bgp_aspath.h" | |
d7d97010 | 48 | #include "bgpd/bgp_zebra.h" |
db0e1937 | 49 | #include "bgpd/bgp_nexthop.h" |
128ea8ab | 50 | |
51 | /* | |
52 | * Definitions and external declarations. | |
53 | */ | |
54 | extern struct zclient *zclient; | |
55 | ||
56 | DEFINE_QOBJ_TYPE(bgpevpn) | |
57 | ||
58 | ||
59 | /* | |
60 | * Static function declarations | |
61 | */ | |
d62a17ae | 62 | static void delete_evpn_route_entry(struct bgp *bgp, struct bgpevpn *vpn, |
63 | afi_t afi, safi_t safi, struct bgp_node *rn, | |
64 | struct bgp_info **ri); | |
65 | static int delete_all_vni_routes(struct bgp *bgp, struct bgpevpn *vpn); | |
14c1a7bf | 66 | |
67 | /* | |
68 | * Private functions. | |
69 | */ | |
70 | ||
71 | /* | |
72 | * Make vni hash key. | |
73 | */ | |
d62a17ae | 74 | static unsigned int vni_hash_key_make(void *p) |
14c1a7bf | 75 | { |
d62a17ae | 76 | struct bgpevpn *vpn = p; |
77 | return (jhash_1word(vpn->vni, 0)); | |
14c1a7bf | 78 | } |
79 | ||
80 | /* | |
81 | * Comparison function for vni hash | |
82 | */ | |
d62a17ae | 83 | static int vni_hash_cmp(const void *p1, const void *p2) |
14c1a7bf | 84 | { |
d62a17ae | 85 | const struct bgpevpn *vpn1 = p1; |
86 | const struct bgpevpn *vpn2 = p2; | |
14c1a7bf | 87 | |
d62a17ae | 88 | if (!vpn1 && !vpn2) |
89 | return 1; | |
90 | if (!vpn1 || !vpn2) | |
91 | return 0; | |
92 | return (vpn1->vni == vpn2->vni); | |
14c1a7bf | 93 | } |
94 | ||
10ebe1ab MK |
95 | /* |
96 | * Make vrf import route target hash key. | |
97 | */ | |
98 | static unsigned int vrf_import_rt_hash_key_make(void *p) | |
99 | { | |
100 | struct vrf_irt_node *irt = p; | |
101 | char *pnt = irt->rt.val; | |
102 | unsigned int key = 0; | |
103 | int c = 0; | |
104 | ||
105 | key += pnt[c]; | |
106 | key += pnt[c + 1]; | |
107 | key += pnt[c + 2]; | |
108 | key += pnt[c + 3]; | |
109 | key += pnt[c + 4]; | |
110 | key += pnt[c + 5]; | |
111 | key += pnt[c + 6]; | |
112 | key += pnt[c + 7]; | |
113 | ||
114 | return key; | |
115 | } | |
116 | ||
117 | /* | |
118 | * Comparison function for vrf import rt hash | |
119 | */ | |
120 | static int vrf_import_rt_hash_cmp(const void *p1, const void *p2) | |
121 | { | |
122 | const struct vrf_irt_node *irt1 = p1; | |
123 | const struct vrf_irt_node *irt2 = p2; | |
124 | ||
125 | if (irt1 == NULL && irt2 == NULL) | |
126 | return 1; | |
127 | ||
128 | if (irt1 == NULL || irt2 == NULL) | |
129 | return 0; | |
130 | ||
131 | return (memcmp(irt1->rt.val, irt2->rt.val, ECOMMUNITY_SIZE) == 0); | |
132 | } | |
133 | ||
134 | /* | |
135 | * Create a new vrf import_rt in default instance | |
136 | */ | |
137 | static struct vrf_irt_node *vrf_import_rt_new(struct ecommunity_val *rt) | |
138 | { | |
139 | struct bgp *bgp_def = NULL; | |
140 | struct vrf_irt_node *irt; | |
141 | ||
142 | bgp_def = bgp_get_default(); | |
143 | if (!bgp_def) { | |
144 | zlog_err("vrf import rt new - def instance not created yet"); | |
145 | return NULL; | |
146 | } | |
147 | ||
148 | irt = XCALLOC(MTYPE_BGP_EVPN_VRF_IMPORT_RT, | |
149 | sizeof(struct vrf_irt_node)); | |
150 | if (!irt) | |
151 | return NULL; | |
152 | ||
153 | irt->rt = *rt; | |
154 | irt->vrfs = list_new(); | |
155 | ||
156 | /* Add to hash */ | |
157 | if (!hash_get(bgp_def->vrf_import_rt_hash, irt, hash_alloc_intern)) { | |
158 | XFREE(MTYPE_BGP_EVPN_VRF_IMPORT_RT, irt); | |
159 | return NULL; | |
160 | } | |
161 | ||
162 | return irt; | |
163 | } | |
164 | ||
165 | /* | |
166 | * Free the vrf import rt node | |
167 | */ | |
168 | static void vrf_import_rt_free(struct vrf_irt_node *irt) | |
169 | { | |
170 | struct bgp *bgp_def = NULL; | |
171 | ||
172 | bgp_def = bgp_get_default(); | |
173 | if (!bgp_def) { | |
174 | zlog_err("vrf import rt free - def instance not created yet"); | |
175 | return; | |
176 | } | |
177 | ||
178 | hash_release(bgp_def->vrf_import_rt_hash, irt); | |
179 | XFREE(MTYPE_BGP_EVPN_VRF_IMPORT_RT, irt); | |
180 | } | |
181 | ||
182 | /* | |
183 | * Function to lookup Import RT node - used to map a RT to set of | |
184 | * VNIs importing routes with that RT. | |
185 | */ | |
186 | static struct vrf_irt_node *lookup_vrf_import_rt(struct ecommunity_val *rt) | |
187 | { | |
188 | struct bgp *bgp_def = NULL; | |
189 | struct vrf_irt_node *irt; | |
190 | struct vrf_irt_node tmp; | |
191 | ||
192 | bgp_def = bgp_get_default(); | |
193 | if (!bgp_def) { | |
194 | zlog_err("vrf import rt lookup - def instance not created yet"); | |
195 | return NULL; | |
196 | } | |
197 | ||
198 | memset(&tmp, 0, sizeof(struct vrf_irt_node)); | |
199 | memcpy(&tmp.rt, rt, ECOMMUNITY_SIZE); | |
200 | irt = hash_lookup(bgp_def->vrf_import_rt_hash, &tmp); | |
201 | return irt; | |
202 | } | |
203 | ||
204 | /* | |
205 | * Is specified VRF present on the RT's list of "importing" VRFs? | |
206 | */ | |
207 | static int is_vrf_present_in_irt_vrfs(struct list *vrfs, | |
208 | struct bgp *bgp_vrf) | |
209 | { | |
210 | struct listnode *node = NULL, *nnode = NULL; | |
211 | struct bgp *tmp_bgp_vrf = NULL; | |
212 | ||
213 | for (ALL_LIST_ELEMENTS(vrfs, node, nnode, tmp_bgp_vrf)) { | |
214 | if (tmp_bgp_vrf == bgp_vrf) | |
215 | return 1; | |
216 | } | |
217 | return 0; | |
218 | } | |
219 | ||
14c1a7bf | 220 | /* |
221 | * Make import route target hash key. | |
222 | */ | |
d62a17ae | 223 | static unsigned int import_rt_hash_key_make(void *p) |
14c1a7bf | 224 | { |
d62a17ae | 225 | struct irt_node *irt = p; |
226 | char *pnt = irt->rt.val; | |
227 | unsigned int key = 0; | |
228 | int c = 0; | |
14c1a7bf | 229 | |
d62a17ae | 230 | key += pnt[c]; |
231 | key += pnt[c + 1]; | |
232 | key += pnt[c + 2]; | |
233 | key += pnt[c + 3]; | |
234 | key += pnt[c + 4]; | |
235 | key += pnt[c + 5]; | |
236 | key += pnt[c + 6]; | |
237 | key += pnt[c + 7]; | |
14c1a7bf | 238 | |
d62a17ae | 239 | return (key); |
14c1a7bf | 240 | } |
241 | ||
242 | /* | |
243 | * Comparison function for import rt hash | |
244 | */ | |
d62a17ae | 245 | static int import_rt_hash_cmp(const void *p1, const void *p2) |
14c1a7bf | 246 | { |
d62a17ae | 247 | const struct irt_node *irt1 = p1; |
248 | const struct irt_node *irt2 = p2; | |
14c1a7bf | 249 | |
d62a17ae | 250 | if (irt1 == NULL && irt2 == NULL) |
251 | return 1; | |
14c1a7bf | 252 | |
d62a17ae | 253 | if (irt1 == NULL || irt2 == NULL) |
254 | return 0; | |
14c1a7bf | 255 | |
d62a17ae | 256 | return (memcmp(irt1->rt.val, irt2->rt.val, ECOMMUNITY_SIZE) == 0); |
14c1a7bf | 257 | } |
258 | ||
7724c0a1 | 259 | /* |
128ea8ab | 260 | * Create a new import_rt |
261 | */ | |
d62a17ae | 262 | static struct irt_node *import_rt_new(struct bgp *bgp, |
263 | struct ecommunity_val *rt) | |
128ea8ab | 264 | { |
d62a17ae | 265 | struct irt_node *irt; |
128ea8ab | 266 | |
d62a17ae | 267 | if (!bgp) |
268 | return NULL; | |
128ea8ab | 269 | |
d62a17ae | 270 | irt = XCALLOC(MTYPE_BGP_EVPN_IMPORT_RT, sizeof(struct irt_node)); |
271 | if (!irt) | |
272 | return NULL; | |
128ea8ab | 273 | |
d62a17ae | 274 | irt->rt = *rt; |
275 | irt->vnis = list_new(); | |
128ea8ab | 276 | |
d62a17ae | 277 | /* Add to hash */ |
278 | if (!hash_get(bgp->import_rt_hash, irt, hash_alloc_intern)) { | |
279 | XFREE(MTYPE_BGP_EVPN_IMPORT_RT, irt); | |
280 | return NULL; | |
281 | } | |
128ea8ab | 282 | |
d62a17ae | 283 | return irt; |
128ea8ab | 284 | } |
285 | ||
286 | /* | |
287 | * Free the import rt node | |
7724c0a1 | 288 | */ |
d62a17ae | 289 | static void import_rt_free(struct bgp *bgp, struct irt_node *irt) |
7724c0a1 | 290 | { |
d62a17ae | 291 | hash_release(bgp->import_rt_hash, irt); |
292 | XFREE(MTYPE_BGP_EVPN_IMPORT_RT, irt); | |
7724c0a1 | 293 | } |
294 | ||
14c1a7bf | 295 | /* |
128ea8ab | 296 | * Function to lookup Import RT node - used to map a RT to set of |
297 | * VNIs importing routes with that RT. | |
298 | */ | |
d62a17ae | 299 | static struct irt_node *lookup_import_rt(struct bgp *bgp, |
300 | struct ecommunity_val *rt) | |
128ea8ab | 301 | { |
d62a17ae | 302 | struct irt_node *irt; |
303 | struct irt_node tmp; | |
128ea8ab | 304 | |
d62a17ae | 305 | memset(&tmp, 0, sizeof(struct irt_node)); |
306 | memcpy(&tmp.rt, rt, ECOMMUNITY_SIZE); | |
307 | irt = hash_lookup(bgp->import_rt_hash, &tmp); | |
308 | return irt; | |
128ea8ab | 309 | } |
310 | ||
311 | /* | |
312 | * Is specified VNI present on the RT's list of "importing" VNIs? | |
313 | */ | |
d62a17ae | 314 | static int is_vni_present_in_irt_vnis(struct list *vnis, struct bgpevpn *vpn) |
128ea8ab | 315 | { |
d62a17ae | 316 | struct listnode *node, *nnode; |
317 | struct bgpevpn *tmp_vpn; | |
128ea8ab | 318 | |
d62a17ae | 319 | for (ALL_LIST_ELEMENTS(vnis, node, nnode, tmp_vpn)) { |
320 | if (tmp_vpn == vpn) | |
321 | return 1; | |
322 | } | |
128ea8ab | 323 | |
d62a17ae | 324 | return 0; |
128ea8ab | 325 | } |
326 | ||
327 | /* | |
328 | * Compare Route Targets. | |
329 | */ | |
d62a17ae | 330 | static int evpn_route_target_cmp(struct ecommunity *ecom1, |
331 | struct ecommunity *ecom2) | |
128ea8ab | 332 | { |
d62a17ae | 333 | if (ecom1 && !ecom2) |
334 | return -1; | |
128ea8ab | 335 | |
d62a17ae | 336 | if (!ecom1 && ecom2) |
337 | return 1; | |
128ea8ab | 338 | |
d62a17ae | 339 | if (!ecom1 && !ecom2) |
340 | return 0; | |
128ea8ab | 341 | |
d62a17ae | 342 | if (ecom1->str && !ecom2->str) |
343 | return -1; | |
128ea8ab | 344 | |
d62a17ae | 345 | if (!ecom1->str && ecom2->str) |
346 | return 1; | |
128ea8ab | 347 | |
d62a17ae | 348 | if (!ecom1->str && !ecom2->str) |
349 | return 0; | |
128ea8ab | 350 | |
d62a17ae | 351 | return strcmp(ecom1->str, ecom2->str); |
128ea8ab | 352 | } |
353 | ||
354 | /* | |
355 | * Mask off global-admin field of specified extended community (RT), | |
356 | * just retain the local-admin field. | |
357 | */ | |
d62a17ae | 358 | static inline void mask_ecom_global_admin(struct ecommunity_val *dst, |
359 | struct ecommunity_val *src) | |
128ea8ab | 360 | { |
d62a17ae | 361 | u_char type; |
128ea8ab | 362 | |
d62a17ae | 363 | type = src->val[0]; |
364 | dst->val[0] = 0; | |
365 | if (type == ECOMMUNITY_ENCODE_AS) { | |
366 | dst->val[2] = dst->val[3] = 0; | |
367 | } else if (type == ECOMMUNITY_ENCODE_AS4 | |
368 | || type == ECOMMUNITY_ENCODE_IP) { | |
369 | dst->val[2] = dst->val[3] = 0; | |
370 | dst->val[4] = dst->val[5] = 0; | |
371 | } | |
128ea8ab | 372 | } |
373 | ||
10ebe1ab MK |
374 | /* |
375 | * Map one RT to specified VRF. | |
376 | * bgp_vrf = BGP vrf instance | |
377 | */ | |
378 | static void map_vrf_to_rt(struct bgp *bgp_vrf, | |
379 | struct ecommunity_val *eval) | |
380 | { | |
381 | struct vrf_irt_node *irt = NULL; | |
382 | struct ecommunity_val eval_tmp; | |
383 | ||
384 | /* If using "automatic" RT, | |
385 | * we only care about the local-admin sub-field. | |
386 | * This is to facilitate using L3VNI(VRF-VNI) | |
387 | * as the RT for EBGP peering too. | |
388 | */ | |
389 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
390 | if (!CHECK_FLAG(bgp_vrf->vrf_flags, | |
391 | BGP_VRF_IMPORT_RT_CFGD)) | |
392 | mask_ecom_global_admin(&eval_tmp, eval); | |
393 | ||
394 | irt = lookup_vrf_import_rt(&eval_tmp); | |
395 | if (irt && irt->vrfs) | |
396 | if (is_vrf_present_in_irt_vrfs(irt->vrfs, bgp_vrf)) | |
397 | /* Already mapped. */ | |
398 | return; | |
399 | ||
400 | if (!irt) { | |
401 | irt = vrf_import_rt_new(&eval_tmp); | |
402 | assert(irt); | |
403 | } | |
404 | ||
405 | /* Add VRF to the list for this RT. */ | |
406 | listnode_add(irt->vrfs, bgp_vrf); | |
407 | } | |
408 | ||
409 | /* | |
410 | * Unmap specified VRF from specified RT. If there are no other | |
411 | * VRFs for this RT, then the RT hash is deleted. | |
412 | * bgp_vrf: BGP VRF specific instance | |
413 | */ | |
414 | static void unmap_vrf_from_rt(struct bgp *bgp_vrf, | |
415 | struct vrf_irt_node *irt) | |
416 | { | |
417 | /* Delete VRF from list for this RT. */ | |
418 | listnode_delete(irt->vrfs, bgp_vrf); | |
419 | if (!listnode_head(irt->vrfs)) { | |
bb7a24ab | 420 | list_delete_and_null(&irt->vrfs); |
10ebe1ab MK |
421 | vrf_import_rt_free(irt); |
422 | } | |
423 | } | |
424 | ||
128ea8ab | 425 | /* |
426 | * Map one RT to specified VNI. | |
14c1a7bf | 427 | */ |
d62a17ae | 428 | static void map_vni_to_rt(struct bgp *bgp, struct bgpevpn *vpn, |
429 | struct ecommunity_val *eval) | |
128ea8ab | 430 | { |
d62a17ae | 431 | struct irt_node *irt; |
432 | struct ecommunity_val eval_tmp; | |
128ea8ab | 433 | |
d62a17ae | 434 | /* If using "automatic" RT, we only care about the local-admin |
435 | * sub-field. | |
436 | * This is to facilitate using VNI as the RT for EBGP peering too. | |
437 | */ | |
438 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
439 | if (!is_import_rt_configured(vpn)) | |
440 | mask_ecom_global_admin(&eval_tmp, eval); | |
128ea8ab | 441 | |
d62a17ae | 442 | irt = lookup_import_rt(bgp, &eval_tmp); |
443 | if (irt && irt->vnis) | |
444 | if (is_vni_present_in_irt_vnis(irt->vnis, vpn)) | |
445 | /* Already mapped. */ | |
446 | return; | |
128ea8ab | 447 | |
d62a17ae | 448 | if (!irt) { |
449 | irt = import_rt_new(bgp, &eval_tmp); | |
450 | assert(irt); | |
451 | } | |
128ea8ab | 452 | |
d62a17ae | 453 | /* Add VNI to the hash list for this RT. */ |
454 | listnode_add(irt->vnis, vpn); | |
128ea8ab | 455 | } |
456 | ||
457 | /* | |
458 | * Unmap specified VNI from specified RT. If there are no other | |
459 | * VNIs for this RT, then the RT hash is deleted. | |
460 | */ | |
d62a17ae | 461 | static void unmap_vni_from_rt(struct bgp *bgp, struct bgpevpn *vpn, |
462 | struct irt_node *irt) | |
14c1a7bf | 463 | { |
d62a17ae | 464 | /* Delete VNI from hash list for this RT. */ |
465 | listnode_delete(irt->vnis, vpn); | |
466 | if (!listnode_head(irt->vnis)) { | |
acdf5e25 | 467 | list_delete_and_null(&irt->vnis); |
d62a17ae | 468 | import_rt_free(bgp, irt); |
469 | } | |
14c1a7bf | 470 | } |
471 | ||
128ea8ab | 472 | /* |
473 | * Create RT extended community automatically from passed information: | |
474 | * of the form AS:VNI. | |
475 | * NOTE: We use only the lower 16 bits of the AS. This is sufficient as | |
476 | * the need is to get a RT value that will be unique across different | |
477 | * VNIs but the same across routers (in the same AS) for a particular | |
478 | * VNI. | |
479 | */ | |
c581d8b0 | 480 | static void form_auto_rt(struct bgp *bgp, vni_t vni, struct list *rtl) |
128ea8ab | 481 | { |
d62a17ae | 482 | struct ecommunity_val eval; |
483 | struct ecommunity *ecomadd; | |
128ea8ab | 484 | |
c581d8b0 | 485 | encode_route_target_as((bgp->as & 0xFFFF), vni, &eval); |
128ea8ab | 486 | |
d62a17ae | 487 | ecomadd = ecommunity_new(); |
488 | ecommunity_add_val(ecomadd, &eval); | |
489 | listnode_add_sort(rtl, ecomadd); | |
128ea8ab | 490 | } |
14c1a7bf | 491 | |
492 | /* | |
128ea8ab | 493 | * Derive RD and RT for a VNI automatically. Invoked at the time of |
494 | * creation of a VNI. | |
495 | */ | |
d62a17ae | 496 | static void derive_rd_rt_for_vni(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 497 | { |
d62a17ae | 498 | bgp_evpn_derive_auto_rd(bgp, vpn); |
499 | bgp_evpn_derive_auto_rt_import(bgp, vpn); | |
500 | bgp_evpn_derive_auto_rt_export(bgp, vpn); | |
128ea8ab | 501 | } |
502 | ||
503 | /* | |
504 | * Add (update) or delete MACIP from zebra. | |
14c1a7bf | 505 | */ |
d62a17ae | 506 | static int bgp_zebra_send_remote_macip(struct bgp *bgp, struct bgpevpn *vpn, |
507 | struct prefix_evpn *p, | |
508 | struct in_addr remote_vtep_ip, int add, | |
ead40654 | 509 | u_char flags) |
d62a17ae | 510 | { |
511 | struct stream *s; | |
512 | int ipa_len; | |
513 | char buf1[ETHER_ADDR_STRLEN]; | |
514 | char buf2[INET6_ADDRSTRLEN]; | |
515 | char buf3[INET6_ADDRSTRLEN]; | |
516 | ||
517 | /* Check socket. */ | |
518 | if (!zclient || zclient->sock < 0) | |
519 | return 0; | |
520 | ||
521 | /* Don't try to register if Zebra doesn't know of this instance. */ | |
522 | if (!IS_BGP_INST_KNOWN_TO_ZEBRA(bgp)) | |
523 | return 0; | |
524 | ||
525 | s = zclient->obuf; | |
526 | stream_reset(s); | |
527 | ||
421bb26a MK |
528 | zclient_create_header(s, add ? ZEBRA_REMOTE_MACIP_ADD |
529 | : ZEBRA_REMOTE_MACIP_DEL, | |
530 | bgp->vrf_id); | |
d62a17ae | 531 | stream_putl(s, vpn->vni); |
28328ea9 | 532 | stream_put(s, &p->prefix.mac.octet, ETH_ALEN); /* Mac Addr */ |
d62a17ae | 533 | /* IP address length and IP address, if any. */ |
534 | if (IS_EVPN_PREFIX_IPADDR_NONE(p)) | |
535 | stream_putl(s, 0); | |
536 | else { | |
537 | ipa_len = IS_EVPN_PREFIX_IPADDR_V4(p) ? IPV4_MAX_BYTELEN | |
538 | : IPV6_MAX_BYTELEN; | |
539 | stream_putl(s, ipa_len); | |
540 | stream_put(s, &p->prefix.ip.ip.addr, ipa_len); | |
541 | } | |
542 | stream_put_in_addr(s, &remote_vtep_ip); | |
543 | ||
ead40654 | 544 | /* TX flags - MAC sticky status and/or gateway mac */ |
d62a17ae | 545 | if (add) |
ead40654 | 546 | stream_putc(s, flags); |
d62a17ae | 547 | |
548 | stream_putw_at(s, 0, stream_get_endp(s)); | |
549 | ||
550 | if (bgp_debug_zebra(NULL)) | |
ead40654 | 551 | zlog_debug("Tx %s MACIP, VNI %u MAC %s IP %s (flags: 0x%x) remote VTEP %s", |
d62a17ae | 552 | add ? "ADD" : "DEL", vpn->vni, |
d62a17ae | 553 | prefix_mac2str(&p->prefix.mac, buf1, sizeof(buf1)), |
554 | ipaddr2str(&p->prefix.ip, buf3, sizeof(buf3)), | |
ead40654 | 555 | flags, |
d62a17ae | 556 | inet_ntop(AF_INET, &remote_vtep_ip, buf2, |
557 | sizeof(buf2))); | |
558 | ||
559 | return zclient_send_message(zclient); | |
7ef5a232 | 560 | } |
b18825eb | 561 | |
128ea8ab | 562 | /* |
563 | * Add (update) or delete remote VTEP from zebra. | |
564 | */ | |
d62a17ae | 565 | static int bgp_zebra_send_remote_vtep(struct bgp *bgp, struct bgpevpn *vpn, |
566 | struct prefix_evpn *p, int add) | |
128ea8ab | 567 | { |
d62a17ae | 568 | struct stream *s; |
128ea8ab | 569 | |
d62a17ae | 570 | /* Check socket. */ |
571 | if (!zclient || zclient->sock < 0) | |
572 | return 0; | |
128ea8ab | 573 | |
d62a17ae | 574 | /* Don't try to register if Zebra doesn't know of this instance. */ |
575 | if (!IS_BGP_INST_KNOWN_TO_ZEBRA(bgp)) | |
576 | return 0; | |
128ea8ab | 577 | |
d62a17ae | 578 | s = zclient->obuf; |
579 | stream_reset(s); | |
128ea8ab | 580 | |
421bb26a MK |
581 | zclient_create_header(s, add ? ZEBRA_REMOTE_VTEP_ADD |
582 | : ZEBRA_REMOTE_VTEP_DEL, | |
583 | bgp->vrf_id); | |
d62a17ae | 584 | stream_putl(s, vpn->vni); |
585 | if (IS_EVPN_PREFIX_IPADDR_V4(p)) | |
586 | stream_put_in_addr(s, &p->prefix.ip.ipaddr_v4); | |
587 | else if (IS_EVPN_PREFIX_IPADDR_V6(p)) { | |
588 | zlog_err( | |
589 | "Bad remote IP when trying to %s remote VTEP for VNI %u", | |
590 | add ? "ADD" : "DEL", vpn->vni); | |
591 | return -1; | |
592 | } | |
128ea8ab | 593 | |
d62a17ae | 594 | stream_putw_at(s, 0, stream_get_endp(s)); |
128ea8ab | 595 | |
d62a17ae | 596 | if (bgp_debug_zebra(NULL)) |
597 | zlog_debug("Tx %s Remote VTEP, VNI %u remote VTEP %s", | |
598 | add ? "ADD" : "DEL", vpn->vni, | |
599 | inet_ntoa(p->prefix.ip.ipaddr_v4)); | |
128ea8ab | 600 | |
d62a17ae | 601 | return zclient_send_message(zclient); |
128ea8ab | 602 | } |
603 | ||
342dd0c6 | 604 | /* |
605 | * Build extended communities for EVPN prefix route. | |
606 | */ | |
607 | static void build_evpn_type5_route_extcomm(struct bgp *bgp_vrf, | |
608 | struct attr *attr) | |
609 | { | |
610 | struct ecommunity ecom_encap; | |
611 | struct ecommunity ecom_rmac; | |
612 | struct ecommunity_val eval; | |
613 | struct ecommunity_val eval_rmac; | |
614 | bgp_encap_types tnl_type; | |
615 | struct listnode *node, *nnode; | |
616 | struct ecommunity *ecom; | |
617 | struct list *vrf_export_rtl = NULL; | |
618 | ||
619 | /* Encap */ | |
620 | tnl_type = BGP_ENCAP_TYPE_VXLAN; | |
621 | memset(&ecom_encap, 0, sizeof(ecom_encap)); | |
622 | encode_encap_extcomm(tnl_type, &eval); | |
623 | ecom_encap.size = 1; | |
624 | ecom_encap.val = (u_int8_t *)eval.val; | |
625 | ||
626 | /* Add Encap */ | |
627 | attr->ecommunity = ecommunity_dup(&ecom_encap); | |
628 | ||
629 | /* Add the export RTs for L3VNI/VRF */ | |
630 | vrf_export_rtl = bgp_vrf->vrf_export_rtl; | |
631 | if (vrf_export_rtl && !list_isempty(vrf_export_rtl)) { | |
632 | for (ALL_LIST_ELEMENTS(vrf_export_rtl, node, nnode, ecom)) | |
633 | attr->ecommunity = ecommunity_merge(attr->ecommunity, | |
634 | ecom); | |
635 | } | |
636 | ||
637 | /* add the router mac extended community */ | |
638 | if (!is_zero_mac(&attr->rmac)) { | |
639 | memset(&ecom_rmac, 0, sizeof(ecom_rmac)); | |
640 | encode_rmac_extcomm(&eval_rmac, &attr->rmac); | |
641 | ecom_rmac.size = 1; | |
642 | ecom_rmac.val = (uint8_t *)eval_rmac.val; | |
643 | attr->ecommunity = ecommunity_merge(attr->ecommunity, | |
644 | &ecom_rmac); | |
645 | } | |
646 | ||
647 | attr->flag |= ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES); | |
648 | } | |
649 | ||
128ea8ab | 650 | /* |
651 | * Build extended communities for EVPN route. RT and ENCAP are | |
652 | * applicable to all routes. | |
7ec156a9 MK |
653 | * TODO: currently kernel doesnt support ipv6 routes with ipv4 nexthops. |
654 | * This means that we can't do symmetric routing for ipv6 hosts routes | |
655 | * in the same way as ipv4 host routes. | |
656 | * We wont attach l3-vni related RTs for ipv6 routes. | |
657 | * For now, We will only adevrtise ipv4 host routes | |
658 | * with L3-VNI related ext-comm. | |
128ea8ab | 659 | */ |
7ec156a9 MK |
660 | static void build_evpn_route_extcomm(struct bgpevpn *vpn, struct attr *attr, |
661 | afi_t afi) | |
128ea8ab | 662 | { |
d62a17ae | 663 | struct ecommunity ecom_encap; |
664 | struct ecommunity ecom_sticky; | |
ead40654 | 665 | struct ecommunity ecom_default_gw; |
bc59a672 | 666 | struct ecommunity ecom_rmac; |
d62a17ae | 667 | struct ecommunity_val eval; |
668 | struct ecommunity_val eval_sticky; | |
ead40654 | 669 | struct ecommunity_val eval_default_gw; |
bc59a672 | 670 | struct ecommunity_val eval_rmac; |
d62a17ae | 671 | bgp_encap_types tnl_type; |
672 | struct listnode *node, *nnode; | |
673 | struct ecommunity *ecom; | |
674 | u_int32_t seqnum; | |
7a3e76f1 | 675 | struct list *vrf_export_rtl = NULL; |
128ea8ab | 676 | |
d62a17ae | 677 | /* Encap */ |
678 | tnl_type = BGP_ENCAP_TYPE_VXLAN; | |
679 | memset(&ecom_encap, 0, sizeof(ecom_encap)); | |
680 | encode_encap_extcomm(tnl_type, &eval); | |
681 | ecom_encap.size = 1; | |
682 | ecom_encap.val = (u_int8_t *)eval.val; | |
128ea8ab | 683 | |
d62a17ae | 684 | /* Add Encap */ |
685 | attr->ecommunity = ecommunity_dup(&ecom_encap); | |
128ea8ab | 686 | |
7a3e76f1 | 687 | /* Add the export RTs for L2VNI */ |
d62a17ae | 688 | for (ALL_LIST_ELEMENTS(vpn->export_rtl, node, nnode, ecom)) |
689 | attr->ecommunity = ecommunity_merge(attr->ecommunity, ecom); | |
128ea8ab | 690 | |
7ec156a9 | 691 | /* Add the export RTs for L3VNI - currently only supported for IPV4 host |
523cafc4 | 692 | * routes |
693 | */ | |
7ec156a9 MK |
694 | if (afi == AFI_IP) { |
695 | vrf_export_rtl = bgpevpn_get_vrf_export_rtl(vpn); | |
696 | if (vrf_export_rtl && !list_isempty(vrf_export_rtl)) { | |
697 | for (ALL_LIST_ELEMENTS(vrf_export_rtl, node, nnode, | |
698 | ecom)) | |
699 | attr->ecommunity = | |
700 | ecommunity_merge(attr->ecommunity, | |
701 | ecom); | |
702 | } | |
f1f8b53c | 703 | } |
7a3e76f1 | 704 | |
d62a17ae | 705 | if (attr->sticky) { |
706 | seqnum = 0; | |
707 | memset(&ecom_sticky, 0, sizeof(ecom_sticky)); | |
708 | encode_mac_mobility_extcomm(1, seqnum, &eval_sticky); | |
709 | ecom_sticky.size = 1; | |
710 | ecom_sticky.val = (u_int8_t *)eval_sticky.val; | |
711 | attr->ecommunity = | |
712 | ecommunity_merge(attr->ecommunity, &ecom_sticky); | |
713 | } | |
c85c03c7 | 714 | |
7ec156a9 | 715 | if (afi == AFI_IP && !is_zero_mac(&attr->rmac)) { |
bc59a672 MK |
716 | memset(&ecom_rmac, 0, sizeof(ecom_rmac)); |
717 | encode_rmac_extcomm(&eval_rmac, &attr->rmac); | |
718 | ecom_rmac.size = 1; | |
719 | ecom_rmac.val = (uint8_t *)eval_rmac.val; | |
720 | attr->ecommunity = ecommunity_merge(attr->ecommunity, | |
721 | &ecom_rmac); | |
722 | } | |
723 | ||
ead40654 MK |
724 | if (attr->default_gw) { |
725 | memset(&ecom_default_gw, 0, sizeof(ecom_default_gw)); | |
726 | encode_default_gw_extcomm(&eval_default_gw); | |
727 | ecom_default_gw.size = 1; | |
728 | ecom_default_gw.val = (uint8_t *)eval_default_gw.val; | |
729 | attr->ecommunity = ecommunity_merge(attr->ecommunity, | |
730 | &ecom_default_gw); | |
731 | } | |
732 | ||
d62a17ae | 733 | attr->flag |= ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES); |
128ea8ab | 734 | } |
735 | ||
736 | /* | |
737 | * Add MAC mobility extended community to attribute. | |
738 | */ | |
d62a17ae | 739 | static void add_mac_mobility_to_attr(u_int32_t seq_num, struct attr *attr) |
740 | { | |
741 | struct ecommunity ecom_tmp; | |
742 | struct ecommunity_val eval; | |
421bb26a | 743 | u_int8_t *ecom_val_ptr; |
d62a17ae | 744 | int i; |
745 | u_int8_t *pnt; | |
746 | int type = 0; | |
747 | int sub_type = 0; | |
748 | ||
749 | /* Build MM */ | |
750 | encode_mac_mobility_extcomm(0, seq_num, &eval); | |
751 | ||
752 | /* Find current MM ecommunity */ | |
421bb26a | 753 | ecom_val_ptr = NULL; |
d62a17ae | 754 | |
755 | if (attr->ecommunity) { | |
756 | for (i = 0; i < attr->ecommunity->size; i++) { | |
757 | pnt = attr->ecommunity->val + (i * 8); | |
758 | type = *pnt++; | |
759 | sub_type = *pnt++; | |
760 | ||
761 | if (type == ECOMMUNITY_ENCODE_EVPN | |
762 | && sub_type | |
763 | == ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY) { | |
421bb26a MK |
764 | ecom_val_ptr = |
765 | (u_int8_t *)(attr->ecommunity->val | |
766 | + (i * 8)); | |
d62a17ae | 767 | break; |
768 | } | |
769 | } | |
770 | } | |
771 | ||
772 | /* Update the existing MM ecommunity */ | |
421bb26a MK |
773 | if (ecom_val_ptr) { |
774 | memcpy(ecom_val_ptr, eval.val, sizeof(char) * ECOMMUNITY_SIZE); | |
d62a17ae | 775 | } |
776 | /* Add MM to existing */ | |
777 | else { | |
778 | memset(&ecom_tmp, 0, sizeof(ecom_tmp)); | |
779 | ecom_tmp.size = 1; | |
780 | ecom_tmp.val = (u_int8_t *)eval.val; | |
781 | ||
782 | attr->ecommunity = | |
783 | ecommunity_merge(attr->ecommunity, &ecom_tmp); | |
784 | } | |
128ea8ab | 785 | } |
786 | ||
787 | /* Install EVPN route into zebra. */ | |
d62a17ae | 788 | static int evpn_zebra_install(struct bgp *bgp, struct bgpevpn *vpn, |
789 | struct prefix_evpn *p, | |
ead40654 | 790 | struct in_addr remote_vtep_ip, u_char flags) |
128ea8ab | 791 | { |
d62a17ae | 792 | int ret; |
128ea8ab | 793 | |
d62a17ae | 794 | if (p->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) |
795 | ret = bgp_zebra_send_remote_macip(bgp, vpn, p, remote_vtep_ip, | |
ead40654 | 796 | 1, flags); |
d62a17ae | 797 | else |
798 | ret = bgp_zebra_send_remote_vtep(bgp, vpn, p, 1); | |
128ea8ab | 799 | |
d62a17ae | 800 | return ret; |
128ea8ab | 801 | } |
802 | ||
803 | /* Uninstall EVPN route from zebra. */ | |
d62a17ae | 804 | static int evpn_zebra_uninstall(struct bgp *bgp, struct bgpevpn *vpn, |
805 | struct prefix_evpn *p, | |
806 | struct in_addr remote_vtep_ip) | |
128ea8ab | 807 | { |
d62a17ae | 808 | int ret; |
128ea8ab | 809 | |
d62a17ae | 810 | if (p->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) |
811 | ret = bgp_zebra_send_remote_macip(bgp, vpn, p, remote_vtep_ip, | |
812 | 0, 0); | |
813 | else | |
814 | ret = bgp_zebra_send_remote_vtep(bgp, vpn, p, 0); | |
128ea8ab | 815 | |
d62a17ae | 816 | return ret; |
128ea8ab | 817 | } |
818 | ||
819 | /* | |
820 | * Due to MAC mobility, the prior "local" best route has been supplanted | |
821 | * by a "remote" best route. The prior route has to be deleted and withdrawn | |
822 | * from peers. | |
823 | */ | |
d62a17ae | 824 | static void evpn_delete_old_local_route(struct bgp *bgp, struct bgpevpn *vpn, |
825 | struct bgp_node *rn, | |
826 | struct bgp_info *old_local) | |
128ea8ab | 827 | { |
d62a17ae | 828 | struct bgp_node *global_rn; |
829 | struct bgp_info *ri; | |
830 | afi_t afi = AFI_L2VPN; | |
831 | safi_t safi = SAFI_EVPN; | |
128ea8ab | 832 | |
d62a17ae | 833 | /* Locate route node in the global EVPN routing table. Note that |
834 | * this table is a 2-level tree (RD-level + Prefix-level) similar to | |
835 | * L3VPN routes. | |
836 | */ | |
837 | global_rn = bgp_afi_node_lookup(bgp->rib[afi][safi], afi, safi, | |
838 | (struct prefix *)&rn->p, &vpn->prd); | |
839 | if (global_rn) { | |
840 | /* Delete route entry in the global EVPN table. */ | |
841 | delete_evpn_route_entry(bgp, vpn, afi, safi, global_rn, &ri); | |
128ea8ab | 842 | |
d62a17ae | 843 | /* Schedule for processing - withdraws to peers happen from |
844 | * this table. | |
845 | */ | |
846 | if (ri) | |
847 | bgp_process(bgp, global_rn, afi, safi); | |
848 | bgp_unlock_node(global_rn); | |
849 | } | |
128ea8ab | 850 | |
d62a17ae | 851 | /* Delete route entry in the VNI route table, caller to remove. */ |
852 | bgp_info_delete(rn, old_local); | |
128ea8ab | 853 | } |
854 | ||
855 | /* | |
856 | * Calculate the best path for an EVPN route. Install/update best path in zebra, | |
857 | * if appropriate. | |
858 | */ | |
d62a17ae | 859 | static int evpn_route_select_install(struct bgp *bgp, struct bgpevpn *vpn, |
860 | struct bgp_node *rn) | |
861 | { | |
862 | struct bgp_info *old_select, *new_select; | |
863 | struct bgp_info_pair old_and_new; | |
864 | afi_t afi = AFI_L2VPN; | |
865 | safi_t safi = SAFI_EVPN; | |
866 | int ret = 0; | |
ead40654 | 867 | u_char flags = 0; |
d62a17ae | 868 | |
869 | /* Compute the best path. */ | |
870 | bgp_best_selection(bgp, rn, &bgp->maxpaths[afi][safi], &old_and_new, | |
871 | afi, safi); | |
872 | old_select = old_and_new.old; | |
873 | new_select = old_and_new.new; | |
874 | ||
875 | /* If the best path hasn't changed - see if there is still something to | |
876 | * update | |
877 | * to zebra RIB. | |
878 | */ | |
879 | if (old_select && old_select == new_select | |
880 | && old_select->type == ZEBRA_ROUTE_BGP | |
881 | && old_select->sub_type == BGP_ROUTE_NORMAL | |
882 | && !CHECK_FLAG(rn->flags, BGP_NODE_USER_CLEAR) | |
883 | && !CHECK_FLAG(old_select->flags, BGP_INFO_ATTR_CHANGED) | |
884 | && !bgp->addpath_tx_used[afi][safi]) { | |
ead40654 MK |
885 | if (bgp_zebra_has_route_changed(rn, old_select)) { |
886 | if (old_select->attr->sticky) | |
887 | SET_FLAG(flags, ZEBRA_MACIP_TYPE_STICKY); | |
888 | if (old_select->attr->default_gw) | |
889 | SET_FLAG(flags, ZEBRA_MACIP_TYPE_GW); | |
d62a17ae | 890 | ret = evpn_zebra_install(bgp, vpn, |
891 | (struct prefix_evpn *)&rn->p, | |
892 | old_select->attr->nexthop, | |
ead40654 MK |
893 | flags); |
894 | } | |
d62a17ae | 895 | UNSET_FLAG(old_select->flags, BGP_INFO_MULTIPATH_CHG); |
896 | bgp_zebra_clear_route_change_flags(rn); | |
897 | return ret; | |
898 | } | |
899 | ||
900 | /* If the user did a "clear" this flag will be set */ | |
901 | UNSET_FLAG(rn->flags, BGP_NODE_USER_CLEAR); | |
902 | ||
903 | /* bestpath has changed; update relevant fields and install or uninstall | |
904 | * into the zebra RIB. | |
905 | */ | |
906 | if (old_select || new_select) | |
907 | bgp_bump_version(rn); | |
908 | ||
909 | if (old_select) | |
910 | bgp_info_unset_flag(rn, old_select, BGP_INFO_SELECTED); | |
911 | if (new_select) { | |
912 | bgp_info_set_flag(rn, new_select, BGP_INFO_SELECTED); | |
913 | bgp_info_unset_flag(rn, new_select, BGP_INFO_ATTR_CHANGED); | |
914 | UNSET_FLAG(new_select->flags, BGP_INFO_MULTIPATH_CHG); | |
915 | } | |
916 | ||
917 | if (new_select && new_select->type == ZEBRA_ROUTE_BGP | |
918 | && new_select->sub_type == BGP_ROUTE_NORMAL) { | |
ead40654 MK |
919 | flags = 0; |
920 | if (new_select->attr->sticky) | |
921 | SET_FLAG(flags, ZEBRA_MACIP_TYPE_STICKY); | |
922 | if (new_select->attr->default_gw) | |
923 | SET_FLAG(flags, ZEBRA_MACIP_TYPE_GW); | |
d62a17ae | 924 | ret = evpn_zebra_install(bgp, vpn, (struct prefix_evpn *)&rn->p, |
925 | new_select->attr->nexthop, | |
ead40654 | 926 | flags); |
d62a17ae | 927 | /* If an old best existed and it was a "local" route, the only |
928 | * reason | |
929 | * it would be supplanted is due to MAC mobility procedures. So, | |
930 | * we | |
931 | * need to do an implicit delete and withdraw that route from | |
932 | * peers. | |
933 | */ | |
934 | if (old_select && old_select->peer == bgp->peer_self | |
935 | && old_select->type == ZEBRA_ROUTE_BGP | |
936 | && old_select->sub_type == BGP_ROUTE_STATIC) | |
937 | evpn_delete_old_local_route(bgp, vpn, rn, old_select); | |
938 | } else { | |
939 | if (old_select && old_select->type == ZEBRA_ROUTE_BGP | |
940 | && old_select->sub_type == BGP_ROUTE_NORMAL) | |
941 | ret = evpn_zebra_uninstall(bgp, vpn, | |
942 | (struct prefix_evpn *)&rn->p, | |
943 | old_select->attr->nexthop); | |
944 | } | |
945 | ||
946 | /* Clear any route change flags. */ | |
947 | bgp_zebra_clear_route_change_flags(rn); | |
948 | ||
949 | /* Reap old select bgp_info, if it has been removed */ | |
950 | if (old_select && CHECK_FLAG(old_select->flags, BGP_INFO_REMOVED)) | |
951 | bgp_info_reap(rn, old_select); | |
952 | ||
953 | return ret; | |
128ea8ab | 954 | } |
955 | ||
ead40654 MK |
956 | /* |
957 | * Return true if the local ri for this rn is of type gateway mac | |
958 | */ | |
959 | static int evpn_route_is_def_gw(struct bgp *bgp, struct bgp_node *rn) | |
960 | { | |
961 | struct bgp_info *tmp_ri = NULL; | |
962 | struct bgp_info *local_ri = NULL; | |
963 | ||
964 | local_ri = NULL; | |
965 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) { | |
966 | if (tmp_ri->peer == bgp->peer_self | |
967 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
968 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
969 | local_ri = tmp_ri; | |
970 | } | |
971 | ||
972 | if (!local_ri) | |
973 | return 0; | |
974 | ||
975 | return local_ri->attr->default_gw; | |
976 | } | |
977 | ||
c85c03c7 | 978 | |
979 | /* | |
980 | * Return true if the local ri for this rn has sticky set | |
981 | */ | |
d62a17ae | 982 | static int evpn_route_is_sticky(struct bgp *bgp, struct bgp_node *rn) |
c85c03c7 | 983 | { |
d62a17ae | 984 | struct bgp_info *tmp_ri; |
985 | struct bgp_info *local_ri; | |
c85c03c7 | 986 | |
d62a17ae | 987 | local_ri = NULL; |
988 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) { | |
989 | if (tmp_ri->peer == bgp->peer_self | |
990 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
991 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
992 | local_ri = tmp_ri; | |
993 | } | |
c85c03c7 | 994 | |
d62a17ae | 995 | if (!local_ri) |
996 | return 0; | |
c85c03c7 | 997 | |
d62a17ae | 998 | return local_ri->attr->sticky; |
c85c03c7 | 999 | } |
1000 | ||
342dd0c6 | 1001 | static int update_evpn_type5_route_entry(struct bgp *bgp_def, |
1002 | struct bgp *bgp_vrf, afi_t afi, | |
1003 | safi_t safi, struct bgp_node *rn, | |
5424b7ba | 1004 | struct attr *attr, int *route_changed) |
342dd0c6 | 1005 | { |
1006 | struct attr *attr_new = NULL; | |
1007 | struct bgp_info *ri = NULL; | |
1008 | mpls_label_t label = MPLS_INVALID_LABEL; | |
1009 | struct bgp_info *local_ri = NULL; | |
1010 | struct bgp_info *tmp_ri = NULL; | |
1011 | ||
5424b7ba | 1012 | *route_changed = 0; |
342dd0c6 | 1013 | /* locate the local route entry if any */ |
1014 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) { | |
1015 | if (tmp_ri->peer == bgp_def->peer_self | |
1016 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
1017 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
1018 | local_ri = tmp_ri; | |
1019 | } | |
1020 | ||
1021 | /* create a new route entry if one doesnt exist. | |
523cafc4 | 1022 | Otherwise see if route attr has changed |
1023 | */ | |
342dd0c6 | 1024 | if (!local_ri) { |
1025 | ||
5424b7ba MK |
1026 | /* route has changed as this is the first entry */ |
1027 | *route_changed = 1; | |
1028 | ||
342dd0c6 | 1029 | /* Add (or update) attribute to hash. */ |
1030 | attr_new = bgp_attr_intern(attr); | |
1031 | ||
1032 | /* create the route info from attribute */ | |
1033 | ri = info_make(ZEBRA_ROUTE_BGP, BGP_ROUTE_STATIC, 0, | |
1034 | bgp_def->peer_self, attr_new, rn); | |
1035 | SET_FLAG(ri->flags, BGP_INFO_VALID); | |
1036 | ||
b57ba6d2 | 1037 | /* Type-5 routes advertise the L3-VNI */ |
342dd0c6 | 1038 | bgp_info_extra_get(ri); |
1039 | vni2label(bgp_vrf->l3vni, &label); | |
b57ba6d2 MK |
1040 | memcpy(&ri->extra->label, &label, sizeof(label)); |
1041 | ri->extra->num_labels = 1; | |
342dd0c6 | 1042 | |
1043 | /* add the route entry to route node*/ | |
1044 | bgp_info_add(rn, ri); | |
1045 | } else { | |
1046 | ||
1047 | tmp_ri = local_ri; | |
1048 | if (!attrhash_cmp(tmp_ri->attr, attr)) { | |
5424b7ba MK |
1049 | |
1050 | /* attribute changed */ | |
1051 | *route_changed = 1; | |
1052 | ||
342dd0c6 | 1053 | /* The attribute has changed. */ |
1054 | /* Add (or update) attribute to hash. */ | |
1055 | attr_new = bgp_attr_intern(attr); | |
1056 | bgp_info_set_flag(rn, tmp_ri, BGP_INFO_ATTR_CHANGED); | |
1057 | ||
1058 | /* Restore route, if needed. */ | |
1059 | if (CHECK_FLAG(tmp_ri->flags, BGP_INFO_REMOVED)) | |
1060 | bgp_info_restore(rn, tmp_ri); | |
1061 | ||
1062 | /* Unintern existing, set to new. */ | |
1063 | bgp_attr_unintern(&tmp_ri->attr); | |
1064 | tmp_ri->attr = attr_new; | |
1065 | tmp_ri->uptime = bgp_clock(); | |
1066 | } | |
1067 | } | |
1068 | return 0; | |
1069 | } | |
1070 | ||
1071 | /* update evpn type-5 route entry */ | |
1072 | static int update_evpn_type5_route(struct bgp *bgp_vrf, | |
1073 | struct prefix_evpn *evp) | |
1074 | { | |
1075 | afi_t afi = AFI_L2VPN; | |
1076 | safi_t safi = SAFI_EVPN; | |
1077 | struct attr attr; | |
1078 | struct bgp_node *rn = NULL; | |
1079 | struct bgp *bgp_def = NULL; | |
5424b7ba | 1080 | int route_changed = 0; |
342dd0c6 | 1081 | |
1082 | bgp_def = bgp_get_default(); | |
1083 | if (!bgp_def) | |
1084 | return -1; | |
1085 | ||
1086 | /* build path attribute for this route */ | |
1087 | memset(&attr, 0, sizeof(struct attr)); | |
1088 | bgp_attr_default_set(&attr, BGP_ORIGIN_IGP); | |
1089 | attr.nexthop = bgp_vrf->originator_ip; | |
1090 | attr.mp_nexthop_global_in = bgp_vrf->originator_ip; | |
1091 | attr.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
1092 | memcpy(&attr.rmac, &bgp_vrf->rmac, sizeof(struct ethaddr)); | |
1093 | ||
1094 | /* Setup RT and encap extended community */ | |
1095 | build_evpn_type5_route_extcomm(bgp_vrf, &attr); | |
1096 | ||
1097 | /* get the route node in global table */ | |
1098 | rn = bgp_afi_node_get(bgp_def->rib[afi][safi], afi, safi, | |
1099 | (struct prefix *)evp, | |
1100 | &bgp_vrf->vrf_prd); | |
1101 | assert(rn); | |
1102 | ||
1103 | /* create or update the route entry within the route node */ | |
1104 | update_evpn_type5_route_entry(bgp_def, bgp_vrf, | |
1105 | afi, safi, | |
5424b7ba | 1106 | rn, &attr, &route_changed); |
342dd0c6 | 1107 | |
1108 | /* schedule for processing and unlock node */ | |
5424b7ba MK |
1109 | if (route_changed) { |
1110 | bgp_process(bgp_def, rn, afi, safi); | |
1111 | bgp_unlock_node(rn); | |
1112 | } | |
342dd0c6 | 1113 | |
1114 | /* uninten temporary */ | |
1115 | aspath_unintern(&attr.aspath); | |
1116 | return 0; | |
1117 | } | |
1118 | ||
128ea8ab | 1119 | /* |
1120 | * Create or update EVPN route entry. This could be in the VNI route table | |
1121 | * or the global route table. | |
1122 | */ | |
d62a17ae | 1123 | static int update_evpn_route_entry(struct bgp *bgp, struct bgpevpn *vpn, |
1124 | afi_t afi, safi_t safi, struct bgp_node *rn, | |
1125 | struct attr *attr, int add, int vni_table, | |
1a98c087 | 1126 | struct bgp_info **ri, u_char flags) |
d62a17ae | 1127 | { |
1128 | struct bgp_info *tmp_ri; | |
1129 | struct bgp_info *local_ri, *remote_ri; | |
1130 | struct attr *attr_new; | |
b57ba6d2 MK |
1131 | mpls_label_t label[BGP_MAX_LABELS]; |
1132 | u_int32_t num_labels = 1; | |
d62a17ae | 1133 | int route_change = 1; |
1134 | u_char sticky = 0; | |
b57ba6d2 | 1135 | struct prefix_evpn *evp; |
d62a17ae | 1136 | |
1137 | *ri = NULL; | |
b57ba6d2 MK |
1138 | evp = (struct prefix_evpn *)&rn->p; |
1139 | memset(&label, 0, sizeof(label)); | |
d62a17ae | 1140 | |
1141 | /* See if this is an update of an existing route, or a new add. Also, | |
1142 | * identify if already known from remote, and if so, the one with the | |
1143 | * highest sequence number; this is only when adding to the VNI routing | |
1144 | * table. | |
1145 | */ | |
1146 | local_ri = remote_ri = NULL; | |
1147 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) { | |
1148 | if (tmp_ri->peer == bgp->peer_self | |
1149 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
1150 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
1151 | local_ri = tmp_ri; | |
1152 | if (vni_table) { | |
1153 | if (tmp_ri->type == ZEBRA_ROUTE_BGP | |
1154 | && tmp_ri->sub_type == BGP_ROUTE_NORMAL | |
1155 | && CHECK_FLAG(tmp_ri->flags, BGP_INFO_VALID)) { | |
1156 | if (!remote_ri) | |
1157 | remote_ri = tmp_ri; | |
1158 | else if (mac_mobility_seqnum(tmp_ri->attr) | |
1159 | > mac_mobility_seqnum(remote_ri->attr)) | |
1160 | remote_ri = tmp_ri; | |
1161 | } | |
1162 | } | |
1163 | } | |
1164 | ||
1165 | /* If route doesn't exist already, create a new one, if told to. | |
1166 | * Otherwise act based on whether the attributes of the route have | |
1167 | * changed or not. | |
1168 | */ | |
1169 | if (!local_ri && !add) | |
1170 | return 0; | |
1171 | ||
1172 | if (!local_ri) { | |
1173 | /* When learnt locally for the first time but already known from | |
1174 | * remote, we have to initiate appropriate MAC mobility steps. | |
1175 | * This | |
1176 | * is applicable when updating the VNI routing table. | |
1a98c087 MK |
1177 | * We need to skip mobility steps for g/w macs (local mac on g/w |
1178 | * SVI) advertised in EVPN. | |
1179 | * This will ensure that local routes are preferred for g/w macs | |
d62a17ae | 1180 | */ |
ead40654 | 1181 | if (remote_ri && !CHECK_FLAG(flags, ZEBRA_MACIP_TYPE_GW)) { |
d62a17ae | 1182 | u_int32_t cur_seqnum; |
1183 | ||
1184 | /* Add MM extended community to route. */ | |
1185 | cur_seqnum = mac_mobility_seqnum(remote_ri->attr); | |
1186 | add_mac_mobility_to_attr(cur_seqnum + 1, attr); | |
1187 | } | |
1188 | ||
1189 | /* Add (or update) attribute to hash. */ | |
1190 | attr_new = bgp_attr_intern(attr); | |
1191 | ||
1192 | /* Extract MAC mobility sequence number, if any. */ | |
1193 | attr_new->mm_seqnum = | |
1194 | bgp_attr_mac_mobility_seqnum(attr_new, &sticky); | |
1195 | attr_new->sticky = sticky; | |
1196 | ||
1197 | /* Create new route with its attribute. */ | |
1198 | tmp_ri = info_make(ZEBRA_ROUTE_BGP, BGP_ROUTE_STATIC, 0, | |
1199 | bgp->peer_self, attr_new, rn); | |
1200 | SET_FLAG(tmp_ri->flags, BGP_INFO_VALID); | |
1201 | bgp_info_extra_get(tmp_ri); | |
1202 | ||
1203 | /* The VNI goes into the 'label' field of the route */ | |
b57ba6d2 MK |
1204 | vni2label(vpn->vni, &label[0]); |
1205 | /* Type-2 routes may carry a second VNI - the L3-VNI */ | |
1206 | if (evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) { | |
1207 | vni_t l3vni; | |
1208 | ||
1209 | l3vni = bgpevpn_get_l3vni(vpn); | |
1210 | if (l3vni) { | |
1211 | vni2label(l3vni, &label[1]); | |
1212 | num_labels++; | |
1213 | } | |
1214 | } | |
d62a17ae | 1215 | |
b57ba6d2 MK |
1216 | memcpy(&tmp_ri->extra->label, label, sizeof(label)); |
1217 | tmp_ri->extra->num_labels = num_labels; | |
d62a17ae | 1218 | bgp_info_add(rn, tmp_ri); |
1219 | } else { | |
1220 | tmp_ri = local_ri; | |
1221 | if (attrhash_cmp(tmp_ri->attr, attr) | |
1222 | && !CHECK_FLAG(tmp_ri->flags, BGP_INFO_REMOVED)) | |
1223 | route_change = 0; | |
1224 | else { | |
1225 | /* The attribute has changed. */ | |
1226 | /* Add (or update) attribute to hash. */ | |
1227 | attr_new = bgp_attr_intern(attr); | |
1228 | bgp_info_set_flag(rn, tmp_ri, BGP_INFO_ATTR_CHANGED); | |
1229 | ||
1230 | /* Restore route, if needed. */ | |
1231 | if (CHECK_FLAG(tmp_ri->flags, BGP_INFO_REMOVED)) | |
1232 | bgp_info_restore(rn, tmp_ri); | |
1233 | ||
1234 | /* Unintern existing, set to new. */ | |
1235 | bgp_attr_unintern(&tmp_ri->attr); | |
1236 | tmp_ri->attr = attr_new; | |
1237 | tmp_ri->uptime = bgp_clock(); | |
1238 | } | |
1239 | } | |
1240 | ||
1241 | /* Return back the route entry. */ | |
1242 | *ri = tmp_ri; | |
1243 | return route_change; | |
128ea8ab | 1244 | } |
1245 | ||
1246 | /* | |
1247 | * Create or update EVPN route (of type based on prefix) for specified VNI | |
1248 | * and schedule for processing. | |
1249 | */ | |
d62a17ae | 1250 | static int update_evpn_route(struct bgp *bgp, struct bgpevpn *vpn, |
1a98c087 | 1251 | struct prefix_evpn *p, u_char flags) |
128ea8ab | 1252 | { |
d62a17ae | 1253 | struct bgp_node *rn; |
1254 | struct attr attr; | |
1255 | struct attr *attr_new; | |
1256 | struct bgp_info *ri; | |
1257 | afi_t afi = AFI_L2VPN; | |
1258 | safi_t safi = SAFI_EVPN; | |
1259 | int route_change; | |
128ea8ab | 1260 | |
d62a17ae | 1261 | memset(&attr, 0, sizeof(struct attr)); |
128ea8ab | 1262 | |
d62a17ae | 1263 | /* Build path-attribute for this route. */ |
1264 | bgp_attr_default_set(&attr, BGP_ORIGIN_IGP); | |
1265 | attr.nexthop = vpn->originator_ip; | |
1266 | attr.mp_nexthop_global_in = vpn->originator_ip; | |
1267 | attr.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
1a98c087 | 1268 | attr.sticky = CHECK_FLAG(flags, ZEBRA_MAC_TYPE_STICKY) ? 1 : 0; |
ead40654 MK |
1269 | attr.default_gw = CHECK_FLAG(flags, ZEBRA_MACIP_TYPE_GW) ? 1 : 0; |
1270 | attr.flag |= ATTR_FLAG_BIT(BGP_ATTR_PMSI_TUNNEL); | |
bc59a672 | 1271 | bgpevpn_get_rmac(vpn, &attr.rmac); |
a21bd7a3 | 1272 | vni2label(vpn->vni, &(attr.label)); |
128ea8ab | 1273 | |
d62a17ae | 1274 | /* Set up RT and ENCAP extended community. */ |
7ec156a9 MK |
1275 | build_evpn_route_extcomm(vpn, &attr, |
1276 | IS_EVPN_PREFIX_IPADDR_V4(p) ? | |
1277 | AFI_IP : AFI_IP6); | |
128ea8ab | 1278 | |
d62a17ae | 1279 | /* First, create (or fetch) route node within the VNI. */ |
1280 | /* NOTE: There is no RD here. */ | |
1281 | rn = bgp_node_get(vpn->route_table, (struct prefix *)p); | |
128ea8ab | 1282 | |
d62a17ae | 1283 | /* Create or update route entry. */ |
1284 | route_change = update_evpn_route_entry(bgp, vpn, afi, safi, rn, &attr, | |
1a98c087 | 1285 | 1, 1, &ri, flags); |
d62a17ae | 1286 | assert(ri); |
1287 | attr_new = ri->attr; | |
128ea8ab | 1288 | |
d62a17ae | 1289 | /* Perform route selection; this is just to set the flags correctly |
1290 | * as local route in the VNI always wins. | |
1291 | */ | |
1292 | evpn_route_select_install(bgp, vpn, rn); | |
1293 | bgp_unlock_node(rn); | |
128ea8ab | 1294 | |
d62a17ae | 1295 | /* If this is a new route or some attribute has changed, export the |
1296 | * route to the global table. The route will be advertised to peers | |
1297 | * from there. Note that this table is a 2-level tree (RD-level + | |
1298 | * Prefix-level) similar to L3VPN routes. | |
1299 | */ | |
1300 | if (route_change) { | |
1301 | struct bgp_info *global_ri; | |
128ea8ab | 1302 | |
d62a17ae | 1303 | rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, |
1304 | (struct prefix *)p, &vpn->prd); | |
1305 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, attr_new, 1, 0, | |
1a98c087 | 1306 | &global_ri, flags); |
128ea8ab | 1307 | |
d62a17ae | 1308 | /* Schedule for processing and unlock node. */ |
1309 | bgp_process(bgp, rn, afi, safi); | |
1310 | bgp_unlock_node(rn); | |
1311 | } | |
128ea8ab | 1312 | |
d62a17ae | 1313 | /* Unintern temporary. */ |
1314 | aspath_unintern(&attr.aspath); | |
128ea8ab | 1315 | |
d62a17ae | 1316 | return 0; |
128ea8ab | 1317 | } |
1318 | ||
342dd0c6 | 1319 | /* Delete EVPN type5 route entry from global table */ |
1320 | static void delete_evpn_type5_route_entry(struct bgp *bgp_def, | |
1321 | struct bgp *bgp_vrf, | |
1322 | afi_t afi, safi_t safi, | |
1323 | struct bgp_node *rn, | |
1324 | struct bgp_info **ri) | |
1325 | { | |
1326 | struct bgp_info *tmp_ri = NULL; | |
1327 | ||
1328 | *ri = NULL; | |
1329 | ||
1330 | /* find the matching route entry */ | |
1331 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) | |
1332 | if (tmp_ri->peer == bgp_def->peer_self | |
1333 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
1334 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
1335 | break; | |
1336 | ||
1337 | *ri = tmp_ri; | |
1338 | ||
1339 | /* Mark route for delete. */ | |
1340 | if (tmp_ri) | |
1341 | bgp_info_delete(rn, tmp_ri); | |
1342 | } | |
1343 | ||
1344 | /* Delete EVPN type5 route */ | |
1345 | static int delete_evpn_type5_route(struct bgp *bgp_vrf, | |
1346 | struct prefix_evpn *evp) | |
1347 | { | |
1348 | afi_t afi = AFI_L2VPN; | |
1349 | safi_t safi = SAFI_EVPN; | |
1350 | struct bgp_node *rn = NULL; | |
1351 | struct bgp_info *ri = NULL; | |
1352 | struct bgp *bgp_def = NULL; /* default bgp instance */ | |
1353 | ||
1354 | bgp_def = bgp_get_default(); | |
1355 | if (!bgp_def) | |
1356 | return -1; | |
1357 | ||
1358 | /* locate the global route entry for this type-5 prefix */ | |
1359 | rn = bgp_afi_node_lookup(bgp_def->rib[afi][safi], afi, safi, | |
1360 | (struct prefix *)evp, &bgp_vrf->vrf_prd); | |
1361 | if (!rn) | |
1362 | return 0; | |
1363 | ||
1364 | delete_evpn_type5_route_entry(bgp_def, bgp_vrf, afi, safi, rn, &ri); | |
1365 | if (ri) | |
1366 | bgp_process(bgp_def, rn, afi, safi); | |
1367 | bgp_unlock_node(rn); | |
1368 | return 0; | |
1369 | } | |
1370 | ||
128ea8ab | 1371 | /* |
1372 | * Delete EVPN route entry. This could be in the VNI route table | |
1373 | * or the global route table. | |
1374 | */ | |
d62a17ae | 1375 | static void delete_evpn_route_entry(struct bgp *bgp, struct bgpevpn *vpn, |
1376 | afi_t afi, safi_t safi, struct bgp_node *rn, | |
1377 | struct bgp_info **ri) | |
128ea8ab | 1378 | { |
d62a17ae | 1379 | struct bgp_info *tmp_ri; |
128ea8ab | 1380 | |
d62a17ae | 1381 | *ri = NULL; |
128ea8ab | 1382 | |
d62a17ae | 1383 | /* Now, find matching route. */ |
1384 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) | |
1385 | if (tmp_ri->peer == bgp->peer_self | |
1386 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
1387 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
1388 | break; | |
128ea8ab | 1389 | |
d62a17ae | 1390 | *ri = tmp_ri; |
128ea8ab | 1391 | |
d62a17ae | 1392 | /* Mark route for delete. */ |
1393 | if (tmp_ri) | |
1394 | bgp_info_delete(rn, tmp_ri); | |
128ea8ab | 1395 | } |
1396 | ||
1397 | /* | |
1398 | * Delete EVPN route (of type based on prefix) for specified VNI and | |
1399 | * schedule for processing. | |
1400 | */ | |
d62a17ae | 1401 | static int delete_evpn_route(struct bgp *bgp, struct bgpevpn *vpn, |
1402 | struct prefix_evpn *p) | |
1403 | { | |
1404 | struct bgp_node *rn, *global_rn; | |
1405 | struct bgp_info *ri; | |
1406 | afi_t afi = AFI_L2VPN; | |
1407 | safi_t safi = SAFI_EVPN; | |
1408 | ||
1409 | /* First, locate the route node within the VNI. If it doesn't exist, | |
1410 | * there | |
1411 | * is nothing further to do. | |
1412 | */ | |
1413 | /* NOTE: There is no RD here. */ | |
1414 | rn = bgp_node_lookup(vpn->route_table, (struct prefix *)p); | |
1415 | if (!rn) | |
1416 | return 0; | |
1417 | ||
1418 | /* Next, locate route node in the global EVPN routing table. Note that | |
1419 | * this table is a 2-level tree (RD-level + Prefix-level) similar to | |
1420 | * L3VPN routes. | |
1421 | */ | |
1422 | global_rn = bgp_afi_node_lookup(bgp->rib[afi][safi], afi, safi, | |
1423 | (struct prefix *)p, &vpn->prd); | |
1424 | if (global_rn) { | |
1425 | /* Delete route entry in the global EVPN table. */ | |
1426 | delete_evpn_route_entry(bgp, vpn, afi, safi, global_rn, &ri); | |
1427 | ||
1428 | /* Schedule for processing - withdraws to peers happen from | |
1429 | * this table. | |
1430 | */ | |
1431 | if (ri) | |
1432 | bgp_process(bgp, global_rn, afi, safi); | |
1433 | bgp_unlock_node(global_rn); | |
1434 | } | |
1435 | ||
1436 | /* Delete route entry in the VNI route table. This can just be removed. | |
1437 | */ | |
1438 | delete_evpn_route_entry(bgp, vpn, afi, safi, rn, &ri); | |
1439 | if (ri) | |
1440 | bgp_info_reap(rn, ri); | |
1441 | bgp_unlock_node(rn); | |
1442 | ||
1443 | return 0; | |
128ea8ab | 1444 | } |
1445 | ||
1446 | /* | |
1447 | * Update all type-2 (MACIP) local routes for this VNI - these should also | |
1448 | * be scheduled for advertise to peers. | |
1449 | */ | |
d62a17ae | 1450 | static int update_all_type2_routes(struct bgp *bgp, struct bgpevpn *vpn) |
1451 | { | |
1452 | afi_t afi; | |
1453 | safi_t safi; | |
1454 | struct bgp_node *rn; | |
1455 | struct bgp_info *ri; | |
1456 | struct attr attr; | |
1457 | struct attr attr_sticky; | |
ead40654 | 1458 | struct attr attr_def_gw; |
7ec156a9 MK |
1459 | struct attr attr_ip6; |
1460 | struct attr attr_sticky_ip6; | |
ead40654 | 1461 | struct attr attr_def_gw_ip6; |
d62a17ae | 1462 | struct attr *attr_new; |
1463 | ||
1464 | afi = AFI_L2VPN; | |
1465 | safi = SAFI_EVPN; | |
1466 | memset(&attr, 0, sizeof(struct attr)); | |
1467 | memset(&attr_sticky, 0, sizeof(struct attr)); | |
ead40654 | 1468 | memset(&attr_def_gw, 0, sizeof(struct attr)); |
7ec156a9 MK |
1469 | memset(&attr_ip6, 0, sizeof(struct attr)); |
1470 | memset(&attr_sticky_ip6, 0, sizeof(struct attr)); | |
ead40654 | 1471 | memset(&attr_def_gw_ip6, 0, sizeof(struct attr)); |
d62a17ae | 1472 | |
1473 | /* Build path-attribute - all type-2 routes for this VNI will share the | |
1474 | * same path attribute. | |
1475 | */ | |
1476 | bgp_attr_default_set(&attr, BGP_ORIGIN_IGP); | |
1477 | bgp_attr_default_set(&attr_sticky, BGP_ORIGIN_IGP); | |
ead40654 | 1478 | bgp_attr_default_set(&attr_def_gw, BGP_ORIGIN_IGP); |
d62a17ae | 1479 | attr.nexthop = vpn->originator_ip; |
1480 | attr.mp_nexthop_global_in = vpn->originator_ip; | |
1481 | attr.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
bc59a672 | 1482 | bgpevpn_get_rmac(vpn, &attr.rmac); |
d62a17ae | 1483 | attr_sticky.nexthop = vpn->originator_ip; |
1484 | attr_sticky.mp_nexthop_global_in = vpn->originator_ip; | |
1485 | attr_sticky.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
1486 | attr_sticky.sticky = 1; | |
bc59a672 | 1487 | bgpevpn_get_rmac(vpn, &attr_sticky.rmac); |
ead40654 MK |
1488 | attr_def_gw.nexthop = vpn->originator_ip; |
1489 | attr_def_gw.mp_nexthop_global_in = vpn->originator_ip; | |
1490 | attr_def_gw.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
1491 | attr_def_gw.default_gw = 1; | |
1492 | bgpevpn_get_rmac(vpn, &attr_def_gw.rmac); | |
7ec156a9 MK |
1493 | bgp_attr_default_set(&attr_ip6, BGP_ORIGIN_IGP); |
1494 | bgp_attr_default_set(&attr_sticky_ip6, BGP_ORIGIN_IGP); | |
a6ad0a41 | 1495 | bgp_attr_default_set(&attr_def_gw_ip6, BGP_ORIGIN_IGP); |
7ec156a9 MK |
1496 | attr_ip6.nexthop = vpn->originator_ip; |
1497 | attr_ip6.mp_nexthop_global_in = vpn->originator_ip; | |
1498 | attr_ip6.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
1499 | bgpevpn_get_rmac(vpn, &attr_ip6.rmac); | |
1500 | attr_sticky_ip6.nexthop = vpn->originator_ip; | |
1501 | attr_sticky_ip6.mp_nexthop_global_in = vpn->originator_ip; | |
1502 | attr_sticky_ip6.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
1503 | attr_sticky_ip6.sticky = 1; | |
1504 | bgpevpn_get_rmac(vpn, &attr_sticky_ip6.rmac); | |
ead40654 MK |
1505 | attr_def_gw_ip6.nexthop = vpn->originator_ip; |
1506 | attr_def_gw_ip6.mp_nexthop_global_in = vpn->originator_ip; | |
1507 | attr_def_gw_ip6.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
1508 | attr_def_gw_ip6.default_gw = 1; | |
1509 | bgpevpn_get_rmac(vpn, &attr_def_gw_ip6.rmac); | |
d62a17ae | 1510 | |
1511 | /* Set up RT, ENCAP and sticky MAC extended community. */ | |
7ec156a9 MK |
1512 | build_evpn_route_extcomm(vpn, &attr, AFI_IP); |
1513 | build_evpn_route_extcomm(vpn, &attr_sticky, AFI_IP); | |
ead40654 | 1514 | build_evpn_route_extcomm(vpn, &attr_def_gw, AFI_IP); |
7ec156a9 MK |
1515 | build_evpn_route_extcomm(vpn, &attr_ip6, AFI_IP6); |
1516 | build_evpn_route_extcomm(vpn, &attr_sticky_ip6, AFI_IP6); | |
ead40654 | 1517 | build_evpn_route_extcomm(vpn, &attr_def_gw_ip6, AFI_IP); |
d62a17ae | 1518 | |
1519 | /* Walk this VNI's route table and update local type-2 routes. For any | |
1520 | * routes updated, update corresponding entry in the global table too. | |
1521 | */ | |
1522 | for (rn = bgp_table_top(vpn->route_table); rn; | |
1523 | rn = bgp_route_next(rn)) { | |
1524 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
1525 | struct bgp_node *rd_rn; | |
1526 | struct bgp_info *global_ri; | |
1527 | ||
1528 | if (evp->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE) | |
1529 | continue; | |
1530 | ||
7ec156a9 MK |
1531 | if (IS_EVPN_PREFIX_IPADDR_V4(evp)) { |
1532 | if (evpn_route_is_sticky(bgp, rn)) | |
1533 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, | |
1534 | &attr_sticky, 0, 1, | |
1535 | &ri, 0); | |
ead40654 MK |
1536 | else if (evpn_route_is_def_gw(bgp, rn)) |
1537 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, | |
1538 | &attr_def_gw, 0, 1, | |
1539 | &ri, 0); | |
7ec156a9 MK |
1540 | else |
1541 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, | |
1542 | &attr, 0, 1, &ri, 0); | |
1543 | } else { | |
1544 | if (evpn_route_is_sticky(bgp, rn)) | |
1545 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, | |
1546 | &attr_sticky_ip6, 0, 1, | |
1547 | &ri, 0); | |
ead40654 MK |
1548 | else if (evpn_route_is_def_gw(bgp, rn)) |
1549 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, | |
1550 | &attr_def_gw_ip6, 0, 1, | |
1551 | &ri, 0); | |
7ec156a9 MK |
1552 | else |
1553 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, | |
1554 | &attr_ip6, 0, 1, | |
1555 | &ri, 0); | |
1556 | } | |
d62a17ae | 1557 | |
1558 | /* If a local route exists for this prefix, we need to update | |
1559 | * the global routing table too. | |
1560 | */ | |
1561 | if (!ri) | |
1562 | continue; | |
1563 | ||
1564 | /* Perform route selection; this is just to set the flags | |
1565 | * correctly | |
1566 | * as local route in the VNI always wins. | |
1567 | */ | |
1568 | evpn_route_select_install(bgp, vpn, rn); | |
1569 | ||
1570 | attr_new = ri->attr; | |
1571 | ||
1572 | /* Update route in global routing table. */ | |
1573 | rd_rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, | |
1574 | (struct prefix *)evp, &vpn->prd); | |
1575 | assert(rd_rn); | |
1576 | update_evpn_route_entry(bgp, vpn, afi, safi, rd_rn, attr_new, 0, | |
1a98c087 | 1577 | 0, &global_ri, 0); |
d62a17ae | 1578 | |
1579 | /* Schedule for processing and unlock node. */ | |
1580 | bgp_process(bgp, rd_rn, afi, safi); | |
1581 | bgp_unlock_node(rd_rn); | |
1582 | } | |
1583 | ||
1584 | /* Unintern temporary. */ | |
1585 | aspath_unintern(&attr.aspath); | |
ead40654 | 1586 | aspath_unintern(&attr_ip6.aspath); |
d62a17ae | 1587 | aspath_unintern(&attr_sticky.aspath); |
ead40654 MK |
1588 | aspath_unintern(&attr_sticky_ip6.aspath); |
1589 | aspath_unintern(&attr_def_gw.aspath); | |
1590 | aspath_unintern(&attr_def_gw_ip6.aspath); | |
d62a17ae | 1591 | |
1592 | return 0; | |
128ea8ab | 1593 | } |
1594 | ||
1595 | /* | |
1596 | * Delete all type-2 (MACIP) local routes for this VNI - only from the | |
1597 | * global routing table. These are also scheduled for withdraw from peers. | |
1598 | */ | |
d62a17ae | 1599 | static int delete_global_type2_routes(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1600 | { |
d62a17ae | 1601 | afi_t afi; |
1602 | safi_t safi; | |
1603 | struct bgp_node *rdrn, *rn; | |
1604 | struct bgp_table *table; | |
1605 | struct bgp_info *ri; | |
128ea8ab | 1606 | |
d62a17ae | 1607 | afi = AFI_L2VPN; |
1608 | safi = SAFI_EVPN; | |
128ea8ab | 1609 | |
d62a17ae | 1610 | rdrn = bgp_node_lookup(bgp->rib[afi][safi], (struct prefix *)&vpn->prd); |
1611 | if (rdrn && rdrn->info) { | |
1612 | table = (struct bgp_table *)rdrn->info; | |
1613 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) { | |
1614 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
128ea8ab | 1615 | |
d62a17ae | 1616 | if (evp->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE) |
1617 | continue; | |
128ea8ab | 1618 | |
d62a17ae | 1619 | delete_evpn_route_entry(bgp, vpn, afi, safi, rn, &ri); |
1620 | if (ri) | |
1621 | bgp_process(bgp, rn, afi, safi); | |
1622 | } | |
1623 | } | |
128ea8ab | 1624 | |
d62a17ae | 1625 | /* Unlock RD node. */ |
1626 | if (rdrn) | |
1627 | bgp_unlock_node(rdrn); | |
128ea8ab | 1628 | |
d62a17ae | 1629 | return 0; |
128ea8ab | 1630 | } |
1631 | ||
1632 | /* | |
1633 | * Delete all type-2 (MACIP) local routes for this VNI - from the global | |
1634 | * table as well as the per-VNI route table. | |
1635 | */ | |
d62a17ae | 1636 | static int delete_all_type2_routes(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1637 | { |
d62a17ae | 1638 | afi_t afi; |
1639 | safi_t safi; | |
1640 | struct bgp_node *rn; | |
1641 | struct bgp_info *ri; | |
128ea8ab | 1642 | |
d62a17ae | 1643 | afi = AFI_L2VPN; |
1644 | safi = SAFI_EVPN; | |
128ea8ab | 1645 | |
d62a17ae | 1646 | /* First, walk the global route table for this VNI's type-2 local |
1647 | * routes. | |
1648 | * EVPN routes are a 2-level table, first get the RD table. | |
1649 | */ | |
1650 | delete_global_type2_routes(bgp, vpn); | |
128ea8ab | 1651 | |
d62a17ae | 1652 | /* Next, walk this VNI's route table and delete local type-2 routes. */ |
1653 | for (rn = bgp_table_top(vpn->route_table); rn; | |
1654 | rn = bgp_route_next(rn)) { | |
1655 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
128ea8ab | 1656 | |
d62a17ae | 1657 | if (evp->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE) |
1658 | continue; | |
128ea8ab | 1659 | |
d62a17ae | 1660 | delete_evpn_route_entry(bgp, vpn, afi, safi, rn, &ri); |
128ea8ab | 1661 | |
d62a17ae | 1662 | /* Route entry in local table gets deleted immediately. */ |
1663 | if (ri) | |
1664 | bgp_info_reap(rn, ri); | |
1665 | } | |
128ea8ab | 1666 | |
d62a17ae | 1667 | return 0; |
128ea8ab | 1668 | } |
1669 | ||
1670 | /* | |
1671 | * Delete all routes in the per-VNI route table. | |
1672 | */ | |
d62a17ae | 1673 | static int delete_all_vni_routes(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1674 | { |
d62a17ae | 1675 | struct bgp_node *rn; |
1676 | struct bgp_info *ri, *nextri; | |
128ea8ab | 1677 | |
d62a17ae | 1678 | /* Walk this VNI's route table and delete all routes. */ |
1679 | for (rn = bgp_table_top(vpn->route_table); rn; | |
1680 | rn = bgp_route_next(rn)) { | |
1681 | for (ri = rn->info; (ri != NULL) && (nextri = ri->next, 1); | |
1682 | ri = nextri) { | |
1683 | bgp_info_delete(rn, ri); | |
1684 | bgp_info_reap(rn, ri); | |
1685 | } | |
1686 | } | |
128ea8ab | 1687 | |
d62a17ae | 1688 | return 0; |
128ea8ab | 1689 | } |
1690 | ||
1691 | /* | |
1692 | * Update (and advertise) local routes for a VNI. Invoked upon the VNI | |
1693 | * export RT getting modified or change to tunnel IP. Note that these | |
1694 | * situations need the route in the per-VNI table as well as the global | |
1695 | * table to be updated (as attributes change). | |
1696 | */ | |
d62a17ae | 1697 | static int update_routes_for_vni(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1698 | { |
d62a17ae | 1699 | int ret; |
1700 | struct prefix_evpn p; | |
128ea8ab | 1701 | |
d62a17ae | 1702 | /* Update and advertise the type-3 route (only one) followed by the |
1703 | * locally learnt type-2 routes (MACIP) - for this VNI. | |
1704 | */ | |
1705 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
1706 | ret = update_evpn_route(bgp, vpn, &p, 0); | |
1707 | if (ret) | |
1708 | return ret; | |
128ea8ab | 1709 | |
d62a17ae | 1710 | return update_all_type2_routes(bgp, vpn); |
128ea8ab | 1711 | } |
1712 | ||
1713 | /* | |
1714 | * Delete (and withdraw) local routes for specified VNI from the global | |
1715 | * table and per-VNI table. After this, remove all other routes from | |
1716 | * the per-VNI table. Invoked upon the VNI being deleted or EVPN | |
1717 | * (advertise-all-vni) being disabled. | |
1718 | */ | |
d62a17ae | 1719 | static int delete_routes_for_vni(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1720 | { |
d62a17ae | 1721 | int ret; |
1722 | struct prefix_evpn p; | |
128ea8ab | 1723 | |
d62a17ae | 1724 | /* Delete and withdraw locally learnt type-2 routes (MACIP) |
1725 | * followed by type-3 routes (only one) - for this VNI. | |
1726 | */ | |
1727 | ret = delete_all_type2_routes(bgp, vpn); | |
1728 | if (ret) | |
1729 | return ret; | |
128ea8ab | 1730 | |
d62a17ae | 1731 | build_evpn_type3_prefix(&p, vpn->originator_ip); |
1732 | ret = delete_evpn_route(bgp, vpn, &p); | |
1733 | if (ret) | |
1734 | return ret; | |
128ea8ab | 1735 | |
d62a17ae | 1736 | /* Delete all routes from the per-VNI table. */ |
1737 | return delete_all_vni_routes(bgp, vpn); | |
128ea8ab | 1738 | } |
1739 | ||
1740 | /* | |
1741 | * There is a tunnel endpoint IP address change for this VNI, | |
1742 | * need to re-advertise routes with the new nexthop. | |
1743 | */ | |
d62a17ae | 1744 | static int handle_tunnel_ip_change(struct bgp *bgp, struct bgpevpn *vpn, |
1745 | struct in_addr originator_ip) | |
128ea8ab | 1746 | { |
d62a17ae | 1747 | struct prefix_evpn p; |
128ea8ab | 1748 | |
ddd16ed5 MK |
1749 | /* If VNI is not live, we only need to update the originator ip */ |
1750 | if (!is_vni_live(vpn)) { | |
1751 | vpn->originator_ip = originator_ip; | |
1752 | return 0; | |
1753 | } | |
1754 | ||
db0e1937 MK |
1755 | /* Update the tunnel-ip hash */ |
1756 | bgp_tip_del(bgp, &vpn->originator_ip); | |
1757 | bgp_tip_add(bgp, &originator_ip); | |
1758 | ||
1759 | /* filter routes as martian nexthop db has changed */ | |
1760 | bgp_filter_evpn_routes_upon_martian_nh_change(bgp); | |
1761 | ||
d62a17ae | 1762 | /* Need to withdraw type-3 route as the originator IP is part |
1763 | * of the key. | |
1764 | */ | |
1765 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
1766 | delete_evpn_route(bgp, vpn, &p); | |
128ea8ab | 1767 | |
d62a17ae | 1768 | /* Update the tunnel IP and re-advertise all routes for this VNI. */ |
1769 | vpn->originator_ip = originator_ip; | |
1770 | return update_routes_for_vni(bgp, vpn); | |
128ea8ab | 1771 | } |
1772 | ||
d3135ba3 | 1773 | /* |
1774 | * Install route entry into the VRF routing table and invoke route selection. | |
1775 | */ | |
1776 | static int install_evpn_route_entry_in_vrf(struct bgp *bgp_vrf, | |
1777 | struct prefix_evpn *evp, | |
1778 | struct bgp_info *parent_ri) | |
1779 | { | |
1780 | struct bgp_node *rn; | |
1781 | struct bgp_info *ri; | |
1782 | struct attr *attr_new; | |
c4edf708 | 1783 | int ret = 0; |
d3135ba3 | 1784 | struct prefix p; |
1785 | struct prefix *pp = &p; | |
1786 | afi_t afi = 0; | |
1787 | safi_t safi = 0; | |
1eb88002 MK |
1788 | char buf[PREFIX_STRLEN]; |
1789 | char buf1[PREFIX_STRLEN]; | |
d3135ba3 | 1790 | |
1791 | memset(pp, 0, sizeof(struct prefix)); | |
90264d64 MK |
1792 | if (evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) |
1793 | ip_prefix_from_type2_prefix(evp, pp); | |
523cafc4 | 1794 | else if (evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE) |
90264d64 | 1795 | ip_prefix_from_type5_prefix(evp, pp); |
d3135ba3 | 1796 | |
1eb88002 MK |
1797 | if (bgp_debug_zebra(NULL)) { |
1798 | zlog_debug("installing evpn prefix %s as ip prefix %s in vrf %s", | |
1799 | prefix2str(evp, buf, sizeof(buf)), | |
1800 | prefix2str(pp, buf1, sizeof(buf)), | |
1801 | vrf_id_to_name(bgp_vrf->vrf_id)); | |
1802 | } | |
1803 | ||
d3135ba3 | 1804 | /* Create (or fetch) route within the VRF. */ |
1805 | /* NOTE: There is no RD here. */ | |
1806 | if (IS_EVPN_PREFIX_IPADDR_V4(evp)) { | |
1807 | afi = AFI_IP; | |
1808 | safi = SAFI_UNICAST; | |
1809 | rn = bgp_node_get(bgp_vrf->rib[afi][safi], pp); | |
1810 | } else if (IS_EVPN_PREFIX_IPADDR_V6(evp)) { | |
1811 | afi = AFI_IP6; | |
1812 | safi = SAFI_UNICAST; | |
1813 | rn = bgp_node_get(bgp_vrf->rib[afi][safi], pp); | |
1814 | } else | |
1815 | return 0; | |
1816 | ||
1817 | /* Check if route entry is already present. */ | |
1818 | for (ri = rn->info; ri; ri = ri->next) | |
1819 | if (ri->extra | |
1820 | && (struct bgp_info *)ri->extra->parent == parent_ri) | |
1821 | break; | |
1822 | ||
1823 | if (!ri) { | |
1824 | /* Add (or update) attribute to hash. */ | |
1825 | attr_new = bgp_attr_intern(parent_ri->attr); | |
1826 | ||
1827 | /* Create new route with its attribute. */ | |
1828 | ri = info_make(parent_ri->type, parent_ri->sub_type, 0, | |
1829 | parent_ri->peer, attr_new, rn); | |
1830 | SET_FLAG(ri->flags, BGP_INFO_VALID); | |
1831 | bgp_info_extra_get(ri); | |
1832 | ri->extra->parent = parent_ri; | |
b57ba6d2 | 1833 | if (parent_ri->extra) { |
d3135ba3 | 1834 | memcpy(&ri->extra->label, &parent_ri->extra->label, |
b57ba6d2 MK |
1835 | sizeof(ri->extra->label)); |
1836 | ri->extra->num_labels = parent_ri->extra->num_labels; | |
1837 | } | |
d3135ba3 | 1838 | bgp_info_add(rn, ri); |
1839 | } else { | |
1840 | if (attrhash_cmp(ri->attr, parent_ri->attr) | |
1841 | && !CHECK_FLAG(ri->flags, BGP_INFO_REMOVED)) { | |
1842 | bgp_unlock_node(rn); | |
1843 | return 0; | |
1844 | } | |
1845 | /* The attribute has changed. */ | |
1846 | /* Add (or update) attribute to hash. */ | |
1847 | attr_new = bgp_attr_intern(parent_ri->attr); | |
1848 | ||
1849 | /* Restore route, if needed. */ | |
1850 | if (CHECK_FLAG(ri->flags, BGP_INFO_REMOVED)) | |
1851 | bgp_info_restore(rn, ri); | |
1852 | ||
1853 | /* Mark if nexthop has changed. */ | |
1854 | if (!IPV4_ADDR_SAME(&ri->attr->nexthop, &attr_new->nexthop)) | |
1855 | SET_FLAG(ri->flags, BGP_INFO_IGP_CHANGED); | |
1856 | ||
1857 | /* Unintern existing, set to new. */ | |
1858 | bgp_attr_unintern(&ri->attr); | |
1859 | ri->attr = attr_new; | |
1860 | ri->uptime = bgp_clock(); | |
1861 | } | |
1862 | ||
1863 | /* Perform route selection and update zebra, if required. */ | |
1eb88002 | 1864 | bgp_process(bgp_vrf, rn, afi, safi); |
d3135ba3 | 1865 | |
1866 | return ret; | |
1867 | } | |
1868 | ||
128ea8ab | 1869 | /* |
1870 | * Install route entry into the VNI routing table and invoke route selection. | |
1871 | */ | |
d62a17ae | 1872 | static int install_evpn_route_entry(struct bgp *bgp, struct bgpevpn *vpn, |
1873 | struct prefix_evpn *p, | |
1874 | struct bgp_info *parent_ri) | |
1875 | { | |
1876 | struct bgp_node *rn; | |
1877 | struct bgp_info *ri; | |
1878 | struct attr *attr_new; | |
1879 | int ret; | |
1880 | ||
1881 | /* Create (or fetch) route within the VNI. */ | |
1882 | /* NOTE: There is no RD here. */ | |
1883 | rn = bgp_node_get(vpn->route_table, (struct prefix *)p); | |
1884 | ||
1885 | /* Check if route entry is already present. */ | |
1886 | for (ri = rn->info; ri; ri = ri->next) | |
1887 | if (ri->extra | |
1888 | && (struct bgp_info *)ri->extra->parent == parent_ri) | |
1889 | break; | |
1890 | ||
1891 | if (!ri) { | |
1892 | /* Add (or update) attribute to hash. */ | |
1893 | attr_new = bgp_attr_intern(parent_ri->attr); | |
1894 | ||
1895 | /* Create new route with its attribute. */ | |
1896 | ri = info_make(parent_ri->type, parent_ri->sub_type, 0, | |
1897 | parent_ri->peer, attr_new, rn); | |
1898 | SET_FLAG(ri->flags, BGP_INFO_VALID); | |
1899 | bgp_info_extra_get(ri); | |
1900 | ri->extra->parent = parent_ri; | |
b57ba6d2 | 1901 | if (parent_ri->extra) { |
d62a17ae | 1902 | memcpy(&ri->extra->label, &parent_ri->extra->label, |
b57ba6d2 MK |
1903 | sizeof(ri->extra->label)); |
1904 | ri->extra->num_labels = parent_ri->extra->num_labels; | |
1905 | } | |
d62a17ae | 1906 | bgp_info_add(rn, ri); |
1907 | } else { | |
1908 | if (attrhash_cmp(ri->attr, parent_ri->attr) | |
1909 | && !CHECK_FLAG(ri->flags, BGP_INFO_REMOVED)) { | |
1910 | bgp_unlock_node(rn); | |
1911 | return 0; | |
1912 | } | |
1913 | /* The attribute has changed. */ | |
1914 | /* Add (or update) attribute to hash. */ | |
1915 | attr_new = bgp_attr_intern(parent_ri->attr); | |
1916 | ||
1917 | /* Restore route, if needed. */ | |
1918 | if (CHECK_FLAG(ri->flags, BGP_INFO_REMOVED)) | |
1919 | bgp_info_restore(rn, ri); | |
1920 | ||
1921 | /* Mark if nexthop has changed. */ | |
1922 | if (!IPV4_ADDR_SAME(&ri->attr->nexthop, &attr_new->nexthop)) | |
1923 | SET_FLAG(ri->flags, BGP_INFO_IGP_CHANGED); | |
1924 | ||
1925 | /* Unintern existing, set to new. */ | |
1926 | bgp_attr_unintern(&ri->attr); | |
1927 | ri->attr = attr_new; | |
1928 | ri->uptime = bgp_clock(); | |
1929 | } | |
1930 | ||
1931 | /* Perform route selection and update zebra, if required. */ | |
1932 | ret = evpn_route_select_install(bgp, vpn, rn); | |
1933 | ||
1934 | return ret; | |
128ea8ab | 1935 | } |
1936 | ||
d3135ba3 | 1937 | /* |
1938 | * Uninstall route entry from the VRF routing table and send message | |
1939 | * to zebra, if appropriate. | |
1940 | */ | |
1941 | static int uninstall_evpn_route_entry_in_vrf(struct bgp *bgp_vrf, | |
1942 | struct prefix_evpn *evp, | |
1943 | struct bgp_info *parent_ri) | |
1944 | { | |
1945 | struct bgp_node *rn; | |
1946 | struct bgp_info *ri; | |
c4edf708 | 1947 | int ret = 0; |
d3135ba3 | 1948 | struct prefix p; |
1949 | struct prefix *pp = &p; | |
1950 | afi_t afi = 0; | |
1951 | safi_t safi = 0; | |
1eb88002 MK |
1952 | char buf[PREFIX_STRLEN]; |
1953 | char buf1[PREFIX_STRLEN]; | |
d3135ba3 | 1954 | |
1955 | memset(pp, 0, sizeof(struct prefix)); | |
42cb44f2 MK |
1956 | if (evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) |
1957 | ip_prefix_from_type2_prefix(evp, pp); | |
655b04d1 | 1958 | else if (evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE) |
42cb44f2 | 1959 | ip_prefix_from_type5_prefix(evp, pp); |
d3135ba3 | 1960 | |
1eb88002 | 1961 | if (bgp_debug_zebra(NULL)) { |
30a30f57 | 1962 | zlog_debug("uninstalling evpn prefix %s as ip prefix %s in vrf %s", |
1eb88002 MK |
1963 | prefix2str(evp, buf, sizeof(buf)), |
1964 | prefix2str(pp, buf1, sizeof(buf)), | |
1965 | vrf_id_to_name(bgp_vrf->vrf_id)); | |
1966 | } | |
1967 | ||
d3135ba3 | 1968 | /* Locate route within the VRF. */ |
1969 | /* NOTE: There is no RD here. */ | |
1970 | if (IS_EVPN_PREFIX_IPADDR_V4(evp)) { | |
1971 | afi = AFI_IP; | |
1972 | safi = SAFI_UNICAST; | |
1973 | rn = bgp_node_lookup(bgp_vrf->rib[afi][safi], pp); | |
1974 | } else { | |
1975 | afi = AFI_IP6; | |
1976 | safi = SAFI_UNICAST; | |
1977 | rn = bgp_node_lookup(bgp_vrf->rib[afi][safi], pp); | |
1978 | } | |
1979 | ||
1980 | if (!rn) | |
1981 | return 0; | |
1982 | ||
1983 | /* Find matching route entry. */ | |
1984 | for (ri = rn->info; ri; ri = ri->next) | |
1985 | if (ri->extra | |
1986 | && (struct bgp_info *)ri->extra->parent == parent_ri) | |
1987 | break; | |
1988 | ||
1989 | if (!ri) | |
1990 | return 0; | |
1991 | ||
1992 | /* Mark entry for deletion */ | |
1993 | bgp_info_delete(rn, ri); | |
1994 | ||
1995 | /* Perform route selection and update zebra, if required. */ | |
1eb88002 | 1996 | bgp_process(bgp_vrf, rn, afi, safi); |
d3135ba3 | 1997 | |
1998 | /* Unlock route node. */ | |
1999 | bgp_unlock_node(rn); | |
2000 | ||
2001 | return ret; | |
2002 | } | |
2003 | ||
128ea8ab | 2004 | /* |
2005 | * Uninstall route entry from the VNI routing table and send message | |
2006 | * to zebra, if appropriate. | |
2007 | */ | |
d62a17ae | 2008 | static int uninstall_evpn_route_entry(struct bgp *bgp, struct bgpevpn *vpn, |
2009 | struct prefix_evpn *p, | |
2010 | struct bgp_info *parent_ri) | |
128ea8ab | 2011 | { |
d62a17ae | 2012 | struct bgp_node *rn; |
2013 | struct bgp_info *ri; | |
2014 | int ret; | |
128ea8ab | 2015 | |
d62a17ae | 2016 | /* Locate route within the VNI. */ |
2017 | /* NOTE: There is no RD here. */ | |
2018 | rn = bgp_node_lookup(vpn->route_table, (struct prefix *)p); | |
2019 | if (!rn) | |
2020 | return 0; | |
128ea8ab | 2021 | |
d62a17ae | 2022 | /* Find matching route entry. */ |
2023 | for (ri = rn->info; ri; ri = ri->next) | |
2024 | if (ri->extra | |
2025 | && (struct bgp_info *)ri->extra->parent == parent_ri) | |
2026 | break; | |
128ea8ab | 2027 | |
d62a17ae | 2028 | if (!ri) |
2029 | return 0; | |
128ea8ab | 2030 | |
d62a17ae | 2031 | /* Mark entry for deletion */ |
2032 | bgp_info_delete(rn, ri); | |
128ea8ab | 2033 | |
d62a17ae | 2034 | /* Perform route selection and update zebra, if required. */ |
2035 | ret = evpn_route_select_install(bgp, vpn, rn); | |
128ea8ab | 2036 | |
d62a17ae | 2037 | /* Unlock route node. */ |
2038 | bgp_unlock_node(rn); | |
128ea8ab | 2039 | |
d62a17ae | 2040 | return ret; |
128ea8ab | 2041 | } |
2042 | ||
5ba238b7 MK |
2043 | /* |
2044 | * Given a route entry and a VRF, see if this route entry should be | |
2045 | * imported into the VRF i.e., RTs match. | |
2046 | */ | |
2047 | static int is_route_matching_for_vrf(struct bgp *bgp_vrf, | |
2048 | struct bgp_info *ri) | |
2049 | { | |
2050 | struct attr *attr = ri->attr; | |
2051 | struct ecommunity *ecom; | |
2052 | int i; | |
2053 | ||
2054 | assert(attr); | |
2055 | /* Route should have valid RT to be even considered. */ | |
2056 | if (!(attr->flag & ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES))) | |
2057 | return 0; | |
2058 | ||
2059 | ecom = attr->ecommunity; | |
2060 | if (!ecom || !ecom->size) | |
2061 | return 0; | |
2062 | ||
2063 | /* For each extended community RT, see if it matches this VNI. If any RT | |
2064 | * matches, we're done. | |
2065 | */ | |
2066 | for (i = 0; i < ecom->size; i++) { | |
2067 | u_char *pnt; | |
2068 | u_char type, sub_type; | |
2069 | struct ecommunity_val *eval; | |
2070 | struct ecommunity_val eval_tmp; | |
2071 | struct vrf_irt_node *irt; | |
2072 | ||
2073 | /* Only deal with RTs */ | |
2074 | pnt = (ecom->val + (i * ECOMMUNITY_SIZE)); | |
2075 | eval = (struct ecommunity_val *)(ecom->val | |
2076 | + (i * ECOMMUNITY_SIZE)); | |
2077 | type = *pnt++; | |
2078 | sub_type = *pnt++; | |
2079 | if (sub_type != ECOMMUNITY_ROUTE_TARGET) | |
2080 | continue; | |
2081 | ||
2082 | /* See if this RT matches specified VNIs import RTs */ | |
2083 | irt = lookup_vrf_import_rt(eval); | |
2084 | if (irt && irt->vrfs) | |
2085 | if (is_vrf_present_in_irt_vrfs(irt->vrfs, bgp_vrf)) | |
2086 | return 1; | |
2087 | ||
2088 | /* Also check for non-exact match. In this, we mask out the AS | |
2089 | * and | |
2090 | * only check on the local-admin sub-field. This is to | |
2091 | * facilitate using | |
2092 | * VNI as the RT for EBGP peering too. | |
2093 | */ | |
2094 | irt = NULL; | |
2095 | if (type == ECOMMUNITY_ENCODE_AS | |
2096 | || type == ECOMMUNITY_ENCODE_AS4 | |
2097 | || type == ECOMMUNITY_ENCODE_IP) { | |
2098 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
2099 | mask_ecom_global_admin(&eval_tmp, eval); | |
2100 | irt = lookup_vrf_import_rt(&eval_tmp); | |
2101 | } | |
2102 | if (irt && irt->vrfs) | |
2103 | if (is_vrf_present_in_irt_vrfs(irt->vrfs, bgp_vrf)) | |
2104 | return 1; | |
2105 | } | |
2106 | ||
2107 | return 0; | |
2108 | } | |
2109 | ||
128ea8ab | 2110 | /* |
2111 | * Given a route entry and a VNI, see if this route entry should be | |
2112 | * imported into the VNI i.e., RTs match. | |
2113 | */ | |
d62a17ae | 2114 | static int is_route_matching_for_vni(struct bgp *bgp, struct bgpevpn *vpn, |
2115 | struct bgp_info *ri) | |
2116 | { | |
2117 | struct attr *attr = ri->attr; | |
2118 | struct ecommunity *ecom; | |
2119 | int i; | |
2120 | ||
2121 | assert(attr); | |
2122 | /* Route should have valid RT to be even considered. */ | |
2123 | if (!(attr->flag & ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES))) | |
2124 | return 0; | |
2125 | ||
2126 | ecom = attr->ecommunity; | |
2127 | if (!ecom || !ecom->size) | |
2128 | return 0; | |
2129 | ||
2130 | /* For each extended community RT, see if it matches this VNI. If any RT | |
2131 | * matches, we're done. | |
2132 | */ | |
2133 | for (i = 0; i < ecom->size; i++) { | |
2134 | u_char *pnt; | |
2135 | u_char type, sub_type; | |
2136 | struct ecommunity_val *eval; | |
2137 | struct ecommunity_val eval_tmp; | |
2138 | struct irt_node *irt; | |
2139 | ||
2140 | /* Only deal with RTs */ | |
2141 | pnt = (ecom->val + (i * ECOMMUNITY_SIZE)); | |
2142 | eval = (struct ecommunity_val *)(ecom->val | |
2143 | + (i * ECOMMUNITY_SIZE)); | |
2144 | type = *pnt++; | |
2145 | sub_type = *pnt++; | |
2146 | if (sub_type != ECOMMUNITY_ROUTE_TARGET) | |
2147 | continue; | |
2148 | ||
2149 | /* See if this RT matches specified VNIs import RTs */ | |
2150 | irt = lookup_import_rt(bgp, eval); | |
2151 | if (irt && irt->vnis) | |
2152 | if (is_vni_present_in_irt_vnis(irt->vnis, vpn)) | |
2153 | return 1; | |
2154 | ||
2155 | /* Also check for non-exact match. In this, we mask out the AS | |
2156 | * and | |
2157 | * only check on the local-admin sub-field. This is to | |
2158 | * facilitate using | |
2159 | * VNI as the RT for EBGP peering too. | |
2160 | */ | |
2161 | irt = NULL; | |
2162 | if (type == ECOMMUNITY_ENCODE_AS | |
2163 | || type == ECOMMUNITY_ENCODE_AS4 | |
2164 | || type == ECOMMUNITY_ENCODE_IP) { | |
2165 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
2166 | mask_ecom_global_admin(&eval_tmp, eval); | |
2167 | irt = lookup_import_rt(bgp, &eval_tmp); | |
2168 | } | |
2169 | if (irt && irt->vnis) | |
2170 | if (is_vni_present_in_irt_vnis(irt->vnis, vpn)) | |
2171 | return 1; | |
2172 | } | |
2173 | ||
2174 | return 0; | |
128ea8ab | 2175 | } |
2176 | ||
5ba238b7 MK |
2177 | /* |
2178 | * Install or uninstall mac-ip routes are appropriate for this | |
2179 | * particular VRF. | |
2180 | */ | |
2181 | static int install_uninstall_routes_for_vrf(struct bgp *bgp_vrf, | |
2182 | int install) | |
2183 | { | |
2184 | afi_t afi; | |
2185 | safi_t safi; | |
2186 | struct bgp_node *rd_rn, *rn; | |
2187 | struct bgp_table *table; | |
2188 | struct bgp_info *ri; | |
2189 | int ret; | |
2190 | char buf[PREFIX_STRLEN]; | |
2191 | struct bgp *bgp_def = NULL; | |
2192 | ||
2193 | afi = AFI_L2VPN; | |
2194 | safi = SAFI_EVPN; | |
2195 | bgp_def = bgp_get_default(); | |
2196 | if (!bgp_def) | |
2197 | return -1; | |
2198 | ||
2199 | /* Walk entire global routing table and evaluate routes which could be | |
2200 | * imported into this VRF. Note that we need to loop through all global | |
2201 | * routes to determine which route matches the import rt on vrf | |
2202 | */ | |
2203 | for (rd_rn = bgp_table_top(bgp_def->rib[afi][safi]); rd_rn; | |
2204 | rd_rn = bgp_route_next(rd_rn)) { | |
2205 | table = (struct bgp_table *)(rd_rn->info); | |
2206 | if (!table) | |
2207 | continue; | |
2208 | ||
2209 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) { | |
2210 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
2211 | ||
1eb88002 | 2212 | /* if not mac-ip route skip this route */ |
42cb44f2 MK |
2213 | if (!(evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE || |
2214 | evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE)) | |
5ba238b7 MK |
2215 | continue; |
2216 | ||
1eb88002 MK |
2217 | /* if not a mac+ip route skip this route */ |
2218 | if (!(IS_EVPN_PREFIX_IPADDR_V4(evp) || | |
2219 | IS_EVPN_PREFIX_IPADDR_V6(evp))) | |
2220 | continue; | |
2221 | ||
5ba238b7 MK |
2222 | for (ri = rn->info; ri; ri = ri->next) { |
2223 | /* Consider "valid" remote routes applicable for | |
523cafc4 | 2224 | * this VRF. |
2225 | */ | |
5ba238b7 MK |
2226 | if (!(CHECK_FLAG(ri->flags, BGP_INFO_VALID) |
2227 | && ri->type == ZEBRA_ROUTE_BGP | |
2228 | && ri->sub_type == BGP_ROUTE_NORMAL)) | |
2229 | continue; | |
2230 | ||
2231 | if (is_route_matching_for_vrf(bgp_vrf, ri)) { | |
2232 | if (install) | |
2233 | ret = | |
2234 | install_evpn_route_entry_in_vrf( | |
2235 | bgp_vrf, evp, ri); | |
2236 | else | |
2237 | ret = | |
2238 | uninstall_evpn_route_entry_in_vrf( | |
2239 | bgp_vrf, evp, ri); | |
2240 | ||
2241 | if (ret) { | |
2242 | zlog_err( | |
2243 | "Failed to %s EVPN %s route in VRF %s", | |
2244 | install ? "install" | |
2245 | : "uninstall", | |
2246 | prefix2str(evp, buf, | |
2247 | sizeof(buf)), | |
2248 | vrf_id_to_name(bgp_vrf->vrf_id)); | |
2249 | return ret; | |
2250 | } | |
2251 | } | |
2252 | } | |
2253 | } | |
2254 | } | |
2255 | ||
2256 | return 0; | |
2257 | } | |
2258 | ||
128ea8ab | 2259 | /* |
2260 | * Install or uninstall routes of specified type that are appropriate for this | |
2261 | * particular VNI. | |
2262 | */ | |
d62a17ae | 2263 | static int install_uninstall_routes_for_vni(struct bgp *bgp, |
2264 | struct bgpevpn *vpn, | |
2265 | bgp_evpn_route_type rtype, | |
2266 | int install) | |
2267 | { | |
0291c246 MK |
2268 | afi_t afi; |
2269 | safi_t safi; | |
2270 | struct bgp_node *rd_rn, *rn; | |
2271 | struct bgp_table *table; | |
2272 | struct bgp_info *ri; | |
2273 | int ret; | |
d62a17ae | 2274 | |
2275 | afi = AFI_L2VPN; | |
2276 | safi = SAFI_EVPN; | |
2277 | ||
2278 | /* Walk entire global routing table and evaluate routes which could be | |
2279 | * imported into this VPN. Note that we cannot just look at the routes | |
2280 | * for | |
2281 | * the VNI's RD - remote routes applicable for this VNI could have any | |
2282 | * RD. | |
2283 | */ | |
2284 | /* EVPN routes are a 2-level table. */ | |
2285 | for (rd_rn = bgp_table_top(bgp->rib[afi][safi]); rd_rn; | |
2286 | rd_rn = bgp_route_next(rd_rn)) { | |
2287 | table = (struct bgp_table *)(rd_rn->info); | |
2288 | if (!table) | |
2289 | continue; | |
2290 | ||
2291 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) { | |
2292 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
2293 | ||
2294 | if (evp->prefix.route_type != rtype) | |
2295 | continue; | |
2296 | ||
2297 | for (ri = rn->info; ri; ri = ri->next) { | |
2298 | /* Consider "valid" remote routes applicable for | |
2299 | * this VNI. */ | |
2300 | if (!(CHECK_FLAG(ri->flags, BGP_INFO_VALID) | |
2301 | && ri->type == ZEBRA_ROUTE_BGP | |
2302 | && ri->sub_type == BGP_ROUTE_NORMAL)) | |
2303 | continue; | |
2304 | ||
2305 | if (is_route_matching_for_vni(bgp, vpn, ri)) { | |
2306 | if (install) | |
2307 | ret = install_evpn_route_entry( | |
60466a63 | 2308 | bgp, vpn, evp, ri); |
d62a17ae | 2309 | else |
2310 | ret = uninstall_evpn_route_entry( | |
2311 | bgp, vpn, evp, ri); | |
2312 | ||
2313 | if (ret) { | |
2314 | zlog_err( | |
2315 | "%u: Failed to %s EVPN %s route in VNI %u", | |
2316 | bgp->vrf_id, | |
2317 | install ? "install" | |
2318 | : "uninstall", | |
2319 | rtype == BGP_EVPN_MAC_IP_ROUTE | |
2320 | ? "MACIP" | |
2321 | : "IMET", | |
2322 | vpn->vni); | |
2323 | return ret; | |
2324 | } | |
2325 | } | |
2326 | } | |
2327 | } | |
2328 | } | |
2329 | ||
2330 | return 0; | |
128ea8ab | 2331 | } |
2332 | ||
5ba238b7 | 2333 | /* Install any existing remote routes applicable for this VRF into VRF RIB. This |
523cafc4 | 2334 | * is invoked upon l3vni-add or l3vni import rt change |
2335 | */ | |
5ba238b7 MK |
2336 | static int install_routes_for_vrf(struct bgp *bgp_vrf) |
2337 | { | |
2338 | install_uninstall_routes_for_vrf(bgp_vrf, 1); | |
2339 | return 0; | |
2340 | } | |
2341 | ||
128ea8ab | 2342 | /* |
2343 | * Install any existing remote routes applicable for this VNI into its | |
2344 | * routing table. This is invoked when a VNI becomes "live" or its Import | |
2345 | * RT is changed. | |
2346 | */ | |
d62a17ae | 2347 | static int install_routes_for_vni(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 2348 | { |
d62a17ae | 2349 | int ret; |
128ea8ab | 2350 | |
d62a17ae | 2351 | /* Install type-3 routes followed by type-2 routes - the ones applicable |
2352 | * for this VNI. | |
2353 | */ | |
2354 | ret = install_uninstall_routes_for_vni(bgp, vpn, BGP_EVPN_IMET_ROUTE, | |
2355 | 1); | |
2356 | if (ret) | |
2357 | return ret; | |
128ea8ab | 2358 | |
d62a17ae | 2359 | return install_uninstall_routes_for_vni(bgp, vpn, BGP_EVPN_MAC_IP_ROUTE, |
2360 | 1); | |
128ea8ab | 2361 | } |
2362 | ||
5ba238b7 MK |
2363 | /* uninstall routes from l3vni vrf. */ |
2364 | static int uninstall_routes_for_vrf(struct bgp *bgp_vrf) | |
2365 | { | |
2366 | install_uninstall_routes_for_vrf(bgp_vrf, 0); | |
2367 | return 0; | |
2368 | } | |
2369 | ||
90e60aa7 | 2370 | /* |
2371 | * Uninstall any existing remote routes for this VNI. One scenario in which | |
2372 | * this is invoked is upon an import RT change. | |
2373 | */ | |
d62a17ae | 2374 | static int uninstall_routes_for_vni(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 2375 | { |
d62a17ae | 2376 | int ret; |
90e60aa7 | 2377 | |
d62a17ae | 2378 | /* Uninstall type-2 routes followed by type-3 routes - the ones |
2379 | * applicable | |
2380 | * for this VNI. | |
2381 | */ | |
2382 | ret = install_uninstall_routes_for_vni(bgp, vpn, BGP_EVPN_MAC_IP_ROUTE, | |
2383 | 0); | |
2384 | if (ret) | |
2385 | return ret; | |
90e60aa7 | 2386 | |
d62a17ae | 2387 | return install_uninstall_routes_for_vni(bgp, vpn, BGP_EVPN_IMET_ROUTE, |
2388 | 0); | |
90e60aa7 | 2389 | } |
2390 | ||
d3135ba3 | 2391 | /* |
2392 | * Install or uninstall route in matching VRFs (list). | |
2393 | */ | |
2394 | static int install_uninstall_route_in_vrfs(struct bgp *bgp_def, afi_t afi, | |
2395 | safi_t safi, struct prefix_evpn *evp, | |
2396 | struct bgp_info *ri, | |
2397 | struct list *vrfs, int install) | |
2398 | { | |
2399 | char buf[PREFIX2STR_BUFFER]; | |
2400 | struct bgp *bgp_vrf; | |
2401 | struct listnode *node, *nnode; | |
2402 | ||
90264d64 MK |
2403 | /* Only type-2/type-5 routes go into a VRF */ |
2404 | if (!(evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE || | |
2405 | evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE)) | |
d3135ba3 | 2406 | return 0; |
2407 | ||
90264d64 MK |
2408 | /* if it is type-2 route and not a mac+ip route skip this route */ |
2409 | if ((evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) && | |
2410 | !(IS_EVPN_PREFIX_IPADDR_V4(evp) || IS_EVPN_PREFIX_IPADDR_V6(evp))) | |
30a30f57 MK |
2411 | return 0; |
2412 | ||
d3135ba3 | 2413 | for (ALL_LIST_ELEMENTS(vrfs, node, nnode, bgp_vrf)) { |
2414 | int ret; | |
2415 | ||
2416 | if (install) | |
2417 | ret = install_evpn_route_entry_in_vrf(bgp_vrf, | |
2418 | evp, ri); | |
2419 | else | |
2420 | ret = uninstall_evpn_route_entry_in_vrf(bgp_vrf, | |
2421 | evp, ri); | |
2422 | ||
2423 | if (ret) { | |
2424 | zlog_err("%u: Failed to %s prefix %s in VRF %s", | |
2425 | bgp_def->vrf_id, | |
2426 | install ? "install" : "uninstall", | |
2427 | prefix2str(evp, buf, sizeof(buf)), | |
2428 | vrf_id_to_name(bgp_vrf->vrf_id)); | |
2429 | return ret; | |
2430 | } | |
2431 | } | |
2432 | ||
2433 | return 0; | |
2434 | } | |
2435 | ||
128ea8ab | 2436 | /* |
2437 | * Install or uninstall route in matching VNIs (list). | |
2438 | */ | |
d62a17ae | 2439 | static int install_uninstall_route_in_vnis(struct bgp *bgp, afi_t afi, |
2440 | safi_t safi, struct prefix_evpn *evp, | |
2441 | struct bgp_info *ri, | |
2442 | struct list *vnis, int install) | |
128ea8ab | 2443 | { |
d62a17ae | 2444 | struct bgpevpn *vpn; |
2445 | struct listnode *node, *nnode; | |
128ea8ab | 2446 | |
d62a17ae | 2447 | for (ALL_LIST_ELEMENTS(vnis, node, nnode, vpn)) { |
2448 | int ret; | |
128ea8ab | 2449 | |
d62a17ae | 2450 | if (!is_vni_live(vpn)) |
2451 | continue; | |
128ea8ab | 2452 | |
d62a17ae | 2453 | if (install) |
2454 | ret = install_evpn_route_entry(bgp, vpn, evp, ri); | |
2455 | else | |
2456 | ret = uninstall_evpn_route_entry(bgp, vpn, evp, ri); | |
128ea8ab | 2457 | |
d62a17ae | 2458 | if (ret) { |
2459 | zlog_err("%u: Failed to %s EVPN %s route in VNI %u", | |
2460 | bgp->vrf_id, install ? "install" : "uninstall", | |
2461 | evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE | |
2462 | ? "MACIP" | |
2463 | : "IMET", | |
2464 | vpn->vni); | |
2465 | return ret; | |
2466 | } | |
2467 | } | |
128ea8ab | 2468 | |
d62a17ae | 2469 | return 0; |
128ea8ab | 2470 | } |
2471 | ||
2472 | /* | |
2473 | * Install or uninstall route for appropriate VNIs. | |
2474 | */ | |
d62a17ae | 2475 | static int install_uninstall_evpn_route(struct bgp *bgp, afi_t afi, safi_t safi, |
2476 | struct prefix *p, struct bgp_info *ri, | |
2477 | int import) | |
2478 | { | |
2479 | struct prefix_evpn *evp = (struct prefix_evpn *)p; | |
2480 | struct attr *attr = ri->attr; | |
2481 | struct ecommunity *ecom; | |
2482 | int i; | |
2483 | ||
2484 | assert(attr); | |
2485 | ||
90264d64 | 2486 | /* Only type-2 and type-3 and type-5 are supported currently */ |
d62a17ae | 2487 | if (!(evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE |
90264d64 MK |
2488 | || evp->prefix.route_type == BGP_EVPN_IMET_ROUTE |
2489 | || evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE)) | |
d62a17ae | 2490 | return 0; |
2491 | ||
2492 | /* If we don't have Route Target, nothing much to do. */ | |
2493 | if (!(attr->flag & ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES))) | |
2494 | return 0; | |
2495 | ||
2496 | ecom = attr->ecommunity; | |
2497 | if (!ecom || !ecom->size) | |
2498 | return -1; | |
2499 | ||
90264d64 MK |
2500 | /* For each extended community RT, see which VNIs/VRFs match and import |
2501 | * the route into matching VNIs/VRFs. | |
d62a17ae | 2502 | */ |
2503 | for (i = 0; i < ecom->size; i++) { | |
2504 | u_char *pnt; | |
2505 | u_char type, sub_type; | |
2506 | struct ecommunity_val *eval; | |
2507 | struct ecommunity_val eval_tmp; | |
d3135ba3 | 2508 | struct irt_node *irt; /* import rt for l2vni */ |
2509 | struct vrf_irt_node *vrf_irt; /* import rt for l3vni */ | |
d62a17ae | 2510 | |
2511 | /* Only deal with RTs */ | |
2512 | pnt = (ecom->val + (i * ECOMMUNITY_SIZE)); | |
2513 | eval = (struct ecommunity_val *)(ecom->val | |
2514 | + (i * ECOMMUNITY_SIZE)); | |
2515 | type = *pnt++; | |
2516 | sub_type = *pnt++; | |
2517 | if (sub_type != ECOMMUNITY_ROUTE_TARGET) | |
2518 | continue; | |
2519 | ||
90264d64 | 2520 | /* Import route into matching l2-vnis (type-2/type-3 routes go |
523cafc4 | 2521 | * into l2vni table) |
2522 | */ | |
d62a17ae | 2523 | irt = lookup_import_rt(bgp, eval); |
2524 | if (irt && irt->vnis) | |
2525 | install_uninstall_route_in_vnis(bgp, afi, safi, evp, ri, | |
2526 | irt->vnis, import); | |
2527 | ||
90264d64 | 2528 | /* Import route into matching l3-vnis (type-2/type-5 routes go |
523cafc4 | 2529 | * into l3vni/vrf table) |
2530 | */ | |
d3135ba3 | 2531 | vrf_irt = lookup_vrf_import_rt(eval); |
2532 | if (vrf_irt && vrf_irt->vrfs) | |
2533 | install_uninstall_route_in_vrfs(bgp, afi, safi, evp, ri, | |
2534 | vrf_irt->vrfs, import); | |
2535 | ||
90264d64 MK |
2536 | /* Also check for non-exact match. In this, |
2537 | * we mask out the AS and | |
2538 | * only check on the local-admin sub-field. | |
2539 | * This is to facilitate using | |
d62a17ae | 2540 | * VNI as the RT for EBGP peering too. |
2541 | */ | |
2542 | irt = NULL; | |
d3135ba3 | 2543 | vrf_irt = NULL; |
d62a17ae | 2544 | if (type == ECOMMUNITY_ENCODE_AS |
2545 | || type == ECOMMUNITY_ENCODE_AS4 | |
2546 | || type == ECOMMUNITY_ENCODE_IP) { | |
2547 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
2548 | mask_ecom_global_admin(&eval_tmp, eval); | |
2549 | irt = lookup_import_rt(bgp, &eval_tmp); | |
d3135ba3 | 2550 | vrf_irt = lookup_vrf_import_rt(&eval_tmp); |
d62a17ae | 2551 | } |
2552 | if (irt && irt->vnis) | |
2553 | install_uninstall_route_in_vnis(bgp, afi, safi, evp, ri, | |
2554 | irt->vnis, import); | |
d3135ba3 | 2555 | if (vrf_irt && vrf_irt->vrfs) |
2556 | install_uninstall_route_in_vrfs(bgp, afi, safi, evp, | |
2557 | ri, vrf_irt->vrfs, | |
2558 | import); | |
d62a17ae | 2559 | } |
2560 | ||
2561 | return 0; | |
128ea8ab | 2562 | } |
2563 | ||
80b140af MK |
2564 | /* delete and withdraw all ipv4 and ipv6 routes in the vrf table as type-5 |
2565 | * routes */ | |
2566 | static void delete_withdraw_vrf_routes(struct bgp *bgp_vrf) | |
2567 | { | |
2568 | /* delete all ipv4 routes and withdraw from peers */ | |
053905d2 | 2569 | bgp_evpn_withdraw_type5_routes(bgp_vrf, AFI_IP, SAFI_UNICAST); |
80b140af MK |
2570 | |
2571 | /* delete all ipv6 routes and withdraw from peers */ | |
053905d2 | 2572 | bgp_evpn_withdraw_type5_routes(bgp_vrf, AFI_IP6, SAFI_UNICAST); |
80b140af MK |
2573 | } |
2574 | ||
2575 | /* update and advertise all ipv4 and ipv6 routes in thr vrf table as type-5 | |
2576 | * routes */ | |
2577 | static void update_advertise_vrf_routes(struct bgp *bgp_vrf) | |
2578 | { | |
2579 | /* update all ipv4 routes */ | |
053905d2 | 2580 | bgp_evpn_advertise_type5_routes(bgp_vrf, AFI_IP, SAFI_UNICAST); |
80b140af MK |
2581 | |
2582 | /* update all ipv6 routes */ | |
053905d2 | 2583 | bgp_evpn_advertise_type5_routes(bgp_vrf, AFI_IP6, SAFI_UNICAST); |
80b140af MK |
2584 | } |
2585 | ||
676f83b9 | 2586 | /* |
2587 | * update and advertise local routes for a VRF as type-5 routes. | |
2588 | * This is invoked upon RD change for a VRF. Note taht the processing is only | |
2589 | * done in the global route table using the routes which already exist in the | |
2590 | * VRF routing table | |
2591 | */ | |
80b140af | 2592 | static void update_router_id_vrf(struct bgp *bgp_vrf) |
676f83b9 | 2593 | { |
80b140af MK |
2594 | /* skip if the RD is configured */ |
2595 | if (is_vrf_rd_configured(bgp_vrf)) | |
2596 | return; | |
2597 | ||
2598 | /* derive the RD for the VRF based on new router-id */ | |
2599 | bgp_evpn_derive_auto_rd_for_vrf(bgp_vrf); | |
2600 | ||
2601 | /* update advertise ipv4|ipv6 routes as type-5 routes */ | |
2602 | update_advertise_vrf_routes(bgp_vrf); | |
676f83b9 | 2603 | } |
2604 | ||
2605 | /* | |
2606 | * Delete and withdraw all type-5 routes for the RD corresponding to VRF. | |
2607 | * This is invoked upon VRF RD change. The processing is done only from global | |
2608 | * table. | |
2609 | */ | |
80b140af | 2610 | static void withdraw_router_id_vrf(struct bgp *bgp_vrf) |
676f83b9 | 2611 | { |
80b140af MK |
2612 | /* skip if the RD is configured */ |
2613 | if (is_vrf_rd_configured(bgp_vrf)) | |
2614 | return; | |
2615 | ||
2616 | /* delete/withdraw ipv4|ipv6 routes as type-5 routes */ | |
2617 | delete_withdraw_vrf_routes(bgp_vrf); | |
676f83b9 | 2618 | } |
2619 | ||
90e60aa7 | 2620 | /* |
2621 | * Update and advertise local routes for a VNI. Invoked upon router-id | |
2622 | * change. Note that the processing is done only on the global route table | |
2623 | * using routes that already exist in the per-VNI table. | |
2624 | */ | |
d62a17ae | 2625 | static int update_advertise_vni_routes(struct bgp *bgp, struct bgpevpn *vpn) |
2626 | { | |
2627 | struct prefix_evpn p; | |
2628 | struct bgp_node *rn, *global_rn; | |
2629 | struct bgp_info *ri, *global_ri; | |
2630 | struct attr *attr; | |
2631 | afi_t afi = AFI_L2VPN; | |
2632 | safi_t safi = SAFI_EVPN; | |
2633 | ||
2634 | /* Locate type-3 route for VNI in the per-VNI table and use its | |
2635 | * attributes to create and advertise the type-3 route for this VNI | |
2636 | * in the global table. | |
2637 | */ | |
2638 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
2639 | rn = bgp_node_lookup(vpn->route_table, (struct prefix *)&p); | |
2640 | if (!rn) /* unexpected */ | |
2641 | return 0; | |
2642 | for (ri = rn->info; ri; ri = ri->next) | |
2643 | if (ri->peer == bgp->peer_self && ri->type == ZEBRA_ROUTE_BGP | |
2644 | && ri->sub_type == BGP_ROUTE_STATIC) | |
2645 | break; | |
2646 | if (!ri) /* unexpected */ | |
2647 | return 0; | |
2648 | attr = ri->attr; | |
2649 | ||
2650 | global_rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, | |
2651 | (struct prefix *)&p, &vpn->prd); | |
1a98c087 MK |
2652 | update_evpn_route_entry(bgp, vpn, afi, safi, global_rn, attr, 1, 0, &ri, |
2653 | 0); | |
d62a17ae | 2654 | |
2655 | /* Schedule for processing and unlock node. */ | |
2656 | bgp_process(bgp, global_rn, afi, safi); | |
2657 | bgp_unlock_node(global_rn); | |
2658 | ||
2659 | /* Now, walk this VNI's route table and use the route and its attribute | |
2660 | * to create and schedule route in global table. | |
2661 | */ | |
2662 | for (rn = bgp_table_top(vpn->route_table); rn; | |
2663 | rn = bgp_route_next(rn)) { | |
2664 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
2665 | ||
2666 | /* Identify MAC-IP local routes. */ | |
2667 | if (evp->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE) | |
2668 | continue; | |
2669 | ||
2670 | for (ri = rn->info; ri; ri = ri->next) | |
2671 | if (ri->peer == bgp->peer_self | |
2672 | && ri->type == ZEBRA_ROUTE_BGP | |
2673 | && ri->sub_type == BGP_ROUTE_STATIC) | |
2674 | break; | |
2675 | if (!ri) | |
2676 | continue; | |
2677 | ||
2678 | /* Create route in global routing table using this route entry's | |
2679 | * attribute. | |
2680 | */ | |
2681 | attr = ri->attr; | |
2682 | global_rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, | |
2683 | (struct prefix *)evp, &vpn->prd); | |
2684 | assert(global_rn); | |
2685 | update_evpn_route_entry(bgp, vpn, afi, safi, global_rn, attr, 1, | |
1a98c087 | 2686 | 0, &global_ri, 0); |
d62a17ae | 2687 | |
2688 | /* Schedule for processing and unlock node. */ | |
2689 | bgp_process(bgp, global_rn, afi, safi); | |
2690 | bgp_unlock_node(global_rn); | |
2691 | } | |
2692 | ||
2693 | return 0; | |
90e60aa7 | 2694 | } |
2695 | ||
2696 | /* | |
2697 | * Delete (and withdraw) local routes for a VNI - only from the global | |
2698 | * table. Invoked upon router-id change. | |
2699 | */ | |
d62a17ae | 2700 | static int delete_withdraw_vni_routes(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 2701 | { |
d62a17ae | 2702 | int ret; |
2703 | struct prefix_evpn p; | |
2704 | struct bgp_node *global_rn; | |
2705 | struct bgp_info *ri; | |
2706 | afi_t afi = AFI_L2VPN; | |
2707 | safi_t safi = SAFI_EVPN; | |
90e60aa7 | 2708 | |
d62a17ae | 2709 | /* Delete and withdraw locally learnt type-2 routes (MACIP) |
2710 | * for this VNI - from the global table. | |
2711 | */ | |
2712 | ret = delete_global_type2_routes(bgp, vpn); | |
2713 | if (ret) | |
2714 | return ret; | |
90e60aa7 | 2715 | |
d62a17ae | 2716 | /* Remove type-3 route for this VNI from global table. */ |
2717 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
2718 | global_rn = bgp_afi_node_lookup(bgp->rib[afi][safi], afi, safi, | |
2719 | (struct prefix *)&p, &vpn->prd); | |
2720 | if (global_rn) { | |
2721 | /* Delete route entry in the global EVPN table. */ | |
2722 | delete_evpn_route_entry(bgp, vpn, afi, safi, global_rn, &ri); | |
90e60aa7 | 2723 | |
d62a17ae | 2724 | /* Schedule for processing - withdraws to peers happen from |
2725 | * this table. | |
2726 | */ | |
2727 | if (ri) | |
2728 | bgp_process(bgp, global_rn, afi, safi); | |
2729 | bgp_unlock_node(global_rn); | |
2730 | } | |
90e60aa7 | 2731 | |
d62a17ae | 2732 | return 0; |
90e60aa7 | 2733 | } |
2734 | ||
2d48ee25 | 2735 | /* |
2736 | * Handle router-id change. Update and advertise local routes corresponding | |
2737 | * to this VNI from peers. Note that this is invoked after updating the | |
2738 | * router-id. The routes in the per-VNI table are used to create routes in | |
2739 | * the global table and schedule them. | |
2740 | */ | |
d62a17ae | 2741 | static void update_router_id_vni(struct hash_backet *backet, struct bgp *bgp) |
2d48ee25 | 2742 | { |
d62a17ae | 2743 | struct bgpevpn *vpn; |
2d48ee25 | 2744 | |
d62a17ae | 2745 | vpn = (struct bgpevpn *)backet->data; |
2d48ee25 | 2746 | |
d62a17ae | 2747 | if (!vpn) { |
2748 | zlog_warn("%s: VNI hash entry for VNI not found", __FUNCTION__); | |
2749 | return; | |
2750 | } | |
2d48ee25 | 2751 | |
d62a17ae | 2752 | /* Skip VNIs with configured RD. */ |
2753 | if (is_rd_configured(vpn)) | |
2754 | return; | |
2d48ee25 | 2755 | |
d62a17ae | 2756 | bgp_evpn_derive_auto_rd(bgp, vpn); |
2757 | update_advertise_vni_routes(bgp, vpn); | |
2d48ee25 | 2758 | } |
2759 | ||
2760 | /* | |
2761 | * Handle router-id change. Delete and withdraw local routes corresponding | |
2762 | * to this VNI from peers. Note that this is invoked prior to updating | |
2763 | * the router-id and is done only on the global route table, the routes | |
2764 | * are needed in the per-VNI table to re-advertise with new router id. | |
2765 | */ | |
d62a17ae | 2766 | static void withdraw_router_id_vni(struct hash_backet *backet, struct bgp *bgp) |
2d48ee25 | 2767 | { |
d62a17ae | 2768 | struct bgpevpn *vpn; |
2d48ee25 | 2769 | |
d62a17ae | 2770 | vpn = (struct bgpevpn *)backet->data; |
2d48ee25 | 2771 | |
d62a17ae | 2772 | if (!vpn) { |
2773 | zlog_warn("%s: VNI hash entry for VNI not found", __FUNCTION__); | |
2774 | return; | |
2775 | } | |
2d48ee25 | 2776 | |
d62a17ae | 2777 | /* Skip VNIs with configured RD. */ |
2778 | if (is_rd_configured(vpn)) | |
2779 | return; | |
2d48ee25 | 2780 | |
d62a17ae | 2781 | delete_withdraw_vni_routes(bgp, vpn); |
2d48ee25 | 2782 | } |
2783 | ||
128ea8ab | 2784 | /* |
2785 | * Process received EVPN type-2 route (advertise or withdraw). | |
2786 | */ | |
d62a17ae | 2787 | static int process_type2_route(struct peer *peer, afi_t afi, safi_t safi, |
2788 | struct attr *attr, u_char *pfx, int psize, | |
2789 | u_int32_t addpath_id) | |
2790 | { | |
2791 | struct prefix_rd prd; | |
2792 | struct prefix_evpn p; | |
2793 | u_char ipaddr_len; | |
2794 | u_char macaddr_len; | |
b57ba6d2 MK |
2795 | mpls_label_t label[BGP_MAX_LABELS]; /* holds the VNI(s) as in packet */ |
2796 | u_int32_t num_labels = 0; | |
d62a17ae | 2797 | int ret; |
2798 | ||
2799 | /* Type-2 route should be either 33, 37 or 49 bytes or an | |
2800 | * additional 3 bytes if there is a second label (VNI): | |
2801 | * RD (8), ESI (10), Eth Tag (4), MAC Addr Len (1), | |
2802 | * MAC Addr (6), IP len (1), IP (0, 4 or 16), | |
2803 | * MPLS Lbl1 (3), MPLS Lbl2 (0 or 3) | |
2804 | */ | |
2805 | if (psize != 33 && psize != 37 && psize != 49 && psize != 36 | |
2806 | && psize != 40 && psize != 52) { | |
2807 | zlog_err("%u:%s - Rx EVPN Type-2 NLRI with invalid length %d", | |
2808 | peer->bgp->vrf_id, peer->host, psize); | |
2809 | return -1; | |
2810 | } | |
2811 | ||
2812 | /* Make prefix_rd */ | |
2813 | prd.family = AF_UNSPEC; | |
2814 | prd.prefixlen = 64; | |
2815 | memcpy(&prd.val, pfx, 8); | |
2816 | pfx += 8; | |
2817 | ||
2818 | /* Make EVPN prefix. */ | |
2819 | memset(&p, 0, sizeof(struct prefix_evpn)); | |
b03b8898 | 2820 | p.family = AF_EVPN; |
d62a17ae | 2821 | p.prefixlen = EVPN_TYPE_2_ROUTE_PREFIXLEN; |
2822 | p.prefix.route_type = BGP_EVPN_MAC_IP_ROUTE; | |
2823 | ||
2824 | /* Skip over Ethernet Seg Identifier for now. */ | |
2825 | pfx += 10; | |
2826 | ||
2827 | /* Skip over Ethernet Tag for now. */ | |
2828 | pfx += 4; | |
2829 | ||
2830 | /* Get the MAC Addr len */ | |
2831 | macaddr_len = *pfx++; | |
2832 | ||
2833 | /* Get the MAC Addr */ | |
28328ea9 DS |
2834 | if (macaddr_len == (ETH_ALEN * 8)) { |
2835 | memcpy(&p.prefix.mac.octet, pfx, ETH_ALEN); | |
2836 | pfx += ETH_ALEN; | |
d62a17ae | 2837 | } else { |
2838 | zlog_err( | |
2839 | "%u:%s - Rx EVPN Type-2 NLRI with unsupported MAC address length %d", | |
2840 | peer->bgp->vrf_id, peer->host, macaddr_len); | |
2841 | return -1; | |
2842 | } | |
2843 | ||
2844 | ||
2845 | /* Get the IP. */ | |
2846 | ipaddr_len = *pfx++; | |
2847 | if (ipaddr_len != 0 && ipaddr_len != IPV4_MAX_BITLEN | |
2848 | && ipaddr_len != IPV6_MAX_BITLEN) { | |
2849 | zlog_err( | |
2850 | "%u:%s - Rx EVPN Type-2 NLRI with unsupported IP address length %d", | |
2851 | peer->bgp->vrf_id, peer->host, ipaddr_len); | |
2852 | return -1; | |
2853 | } | |
2854 | ||
2855 | if (ipaddr_len) { | |
2856 | ipaddr_len /= 8; /* Convert to bytes. */ | |
2857 | p.prefix.ip.ipa_type = (ipaddr_len == IPV4_MAX_BYTELEN) | |
2858 | ? IPADDR_V4 | |
2859 | : IPADDR_V6; | |
2860 | memcpy(&p.prefix.ip.ip.addr, pfx, ipaddr_len); | |
2861 | } | |
2862 | pfx += ipaddr_len; | |
2863 | ||
b57ba6d2 MK |
2864 | /* Get the VNI(s). Stored as bytes here. */ |
2865 | num_labels++; | |
2866 | memset(label, 0, sizeof(label)); | |
2867 | memcpy(&label[0], pfx, BGP_LABEL_BYTES); | |
2868 | pfx += 3; | |
2869 | psize -= (33 + ipaddr_len); | |
2870 | /* Do we have a second VNI? */ | |
2871 | if (psize) { | |
2872 | num_labels++; | |
2873 | memcpy(&label[1], pfx, BGP_LABEL_BYTES); | |
2874 | pfx += 3; | |
2875 | } | |
d62a17ae | 2876 | |
2877 | /* Process the route. */ | |
2878 | if (attr) | |
2879 | ret = bgp_update(peer, (struct prefix *)&p, addpath_id, attr, | |
2880 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
b57ba6d2 | 2881 | &prd, &label[0], num_labels, 0, NULL); |
d62a17ae | 2882 | else |
2883 | ret = bgp_withdraw(peer, (struct prefix *)&p, addpath_id, attr, | |
2884 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
b57ba6d2 | 2885 | &prd, &label[0], num_labels, NULL); |
d62a17ae | 2886 | return ret; |
128ea8ab | 2887 | } |
2888 | ||
2889 | /* | |
2890 | * Process received EVPN type-3 route (advertise or withdraw). | |
2891 | */ | |
d62a17ae | 2892 | static int process_type3_route(struct peer *peer, afi_t afi, safi_t safi, |
2893 | struct attr *attr, u_char *pfx, int psize, | |
2894 | u_int32_t addpath_id) | |
2895 | { | |
2896 | struct prefix_rd prd; | |
2897 | struct prefix_evpn p; | |
2898 | u_char ipaddr_len; | |
2899 | int ret; | |
2900 | ||
2901 | /* Type-3 route should be either 17 or 29 bytes: RD (8), Eth Tag (4), | |
2902 | * IP len (1) and IP (4 or 16). | |
2903 | */ | |
2904 | if (psize != 17 && psize != 29) { | |
2905 | zlog_err("%u:%s - Rx EVPN Type-3 NLRI with invalid length %d", | |
2906 | peer->bgp->vrf_id, peer->host, psize); | |
2907 | return -1; | |
2908 | } | |
2909 | ||
2910 | /* Make prefix_rd */ | |
2911 | prd.family = AF_UNSPEC; | |
2912 | prd.prefixlen = 64; | |
2913 | memcpy(&prd.val, pfx, 8); | |
2914 | pfx += 8; | |
2915 | ||
2916 | /* Make EVPN prefix. */ | |
2917 | memset(&p, 0, sizeof(struct prefix_evpn)); | |
b03b8898 | 2918 | p.family = AF_EVPN; |
d62a17ae | 2919 | p.prefixlen = EVPN_TYPE_3_ROUTE_PREFIXLEN; |
2920 | p.prefix.route_type = BGP_EVPN_IMET_ROUTE; | |
2921 | ||
2922 | /* Skip over Ethernet Tag for now. */ | |
2923 | pfx += 4; | |
2924 | ||
2925 | /* Get the IP. */ | |
2926 | ipaddr_len = *pfx++; | |
2927 | if (ipaddr_len == IPV4_MAX_BITLEN) { | |
2928 | p.prefix.ip.ipa_type = IPADDR_V4; | |
2929 | memcpy(&p.prefix.ip.ip.addr, pfx, IPV4_MAX_BYTELEN); | |
2930 | } else { | |
2931 | zlog_err( | |
2932 | "%u:%s - Rx EVPN Type-3 NLRI with unsupported IP address length %d", | |
2933 | peer->bgp->vrf_id, peer->host, ipaddr_len); | |
2934 | return -1; | |
2935 | } | |
2936 | ||
2937 | /* Process the route. */ | |
2938 | if (attr) | |
2939 | ret = bgp_update(peer, (struct prefix *)&p, addpath_id, attr, | |
2940 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
b57ba6d2 | 2941 | &prd, NULL, 0, 0, NULL); |
d62a17ae | 2942 | else |
2943 | ret = bgp_withdraw(peer, (struct prefix *)&p, addpath_id, attr, | |
2944 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
b57ba6d2 | 2945 | &prd, NULL, 0, NULL); |
d62a17ae | 2946 | return ret; |
128ea8ab | 2947 | } |
2948 | ||
2949 | /* | |
2950 | * Process received EVPN type-5 route (advertise or withdraw). | |
2951 | */ | |
d62a17ae | 2952 | static int process_type5_route(struct peer *peer, afi_t afi, safi_t safi, |
2953 | struct attr *attr, u_char *pfx, int psize, | |
2954 | u_int32_t addpath_id, int withdraw) | |
2955 | { | |
2956 | struct prefix_rd prd; | |
2957 | struct prefix_evpn p; | |
2958 | struct bgp_route_evpn evpn; | |
2959 | u_char ippfx_len; | |
2960 | u_int32_t eth_tag; | |
b57ba6d2 | 2961 | mpls_label_t label; /* holds the VNI as in the packet */ |
d62a17ae | 2962 | int ret; |
2963 | ||
2964 | /* Type-5 route should be 34 or 58 bytes: | |
2965 | * RD (8), ESI (10), Eth Tag (4), IP len (1), IP (4 or 16), | |
2966 | * GW (4 or 16) and VNI (3). | |
2967 | * Note that the IP and GW should both be IPv4 or both IPv6. | |
2968 | */ | |
2969 | if (psize != 34 && psize != 58) { | |
2970 | zlog_err("%u:%s - Rx EVPN Type-5 NLRI with invalid length %d", | |
2971 | peer->bgp->vrf_id, peer->host, psize); | |
2972 | return -1; | |
2973 | } | |
2974 | ||
2975 | /* Make prefix_rd */ | |
2976 | prd.family = AF_UNSPEC; | |
2977 | prd.prefixlen = 64; | |
2978 | memcpy(&prd.val, pfx, 8); | |
2979 | pfx += 8; | |
2980 | ||
2981 | /* Make EVPN prefix. */ | |
2982 | memset(&p, 0, sizeof(struct prefix_evpn)); | |
b03b8898 | 2983 | p.family = AF_EVPN; |
e9fc2840 | 2984 | p.prefixlen = EVPN_TYPE_5_ROUTE_PREFIXLEN; |
d62a17ae | 2985 | p.prefix.route_type = BGP_EVPN_IP_PREFIX_ROUTE; |
2986 | ||
2987 | /* Additional information outside of prefix - ESI and GW IP */ | |
2988 | memset(&evpn, 0, sizeof(evpn)); | |
2989 | ||
2990 | /* Fetch ESI */ | |
2991 | memcpy(&evpn.eth_s_id.val, pfx, 10); | |
2992 | pfx += 10; | |
2993 | ||
2994 | /* Fetch Ethernet Tag. */ | |
2995 | memcpy(ð_tag, pfx, 4); | |
2996 | p.prefix.eth_tag = ntohl(eth_tag); | |
2997 | pfx += 4; | |
2998 | ||
2999 | /* Fetch IP prefix length. */ | |
3000 | ippfx_len = *pfx++; | |
3001 | if (ippfx_len > IPV6_MAX_BITLEN) { | |
3002 | zlog_err( | |
3003 | "%u:%s - Rx EVPN Type-5 NLRI with invalid IP Prefix length %d", | |
3004 | peer->bgp->vrf_id, peer->host, ippfx_len); | |
3005 | return -1; | |
3006 | } | |
3007 | p.prefix.ip_prefix_length = ippfx_len; | |
3008 | ||
3009 | /* Determine IPv4 or IPv6 prefix */ | |
3010 | /* Since the address and GW are from the same family, this just becomes | |
3011 | * a simple check on the total size. | |
3012 | */ | |
3013 | if (psize == 34) { | |
3014 | SET_IPADDR_V4(&p.prefix.ip); | |
3015 | memcpy(&p.prefix.ip.ipaddr_v4, pfx, 4); | |
3016 | pfx += 4; | |
3017 | memcpy(&evpn.gw_ip.ipv4, pfx, 4); | |
3018 | pfx += 4; | |
d62a17ae | 3019 | } else { |
3020 | SET_IPADDR_V6(&p.prefix.ip); | |
3021 | memcpy(&p.prefix.ip.ipaddr_v6, pfx, 16); | |
3022 | pfx += 16; | |
3023 | memcpy(&evpn.gw_ip.ipv6, pfx, 16); | |
3024 | pfx += 16; | |
d62a17ae | 3025 | } |
3026 | ||
b57ba6d2 MK |
3027 | /* Get the VNI (in MPLS label field). Stored as bytes here. */ |
3028 | memset(&label, 0, sizeof(label)); | |
3029 | memcpy(&label, pfx, BGP_LABEL_BYTES); | |
3030 | pfx += 3; | |
d62a17ae | 3031 | |
3032 | /* Process the route. */ | |
3033 | if (!withdraw) | |
3034 | ret = bgp_update(peer, (struct prefix *)&p, addpath_id, attr, | |
3035 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
b57ba6d2 | 3036 | &prd, &label, 1, 0, &evpn); |
d62a17ae | 3037 | else |
3038 | ret = bgp_withdraw(peer, (struct prefix *)&p, addpath_id, attr, | |
3039 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
b57ba6d2 | 3040 | &prd, &label, 1, &evpn); |
d62a17ae | 3041 | |
3042 | return ret; | |
3043 | } | |
3044 | ||
3045 | static void evpn_mpattr_encode_type5(struct stream *s, struct prefix *p, | |
b57ba6d2 MK |
3046 | struct prefix_rd *prd, |
3047 | mpls_label_t *label, u_int32_t num_labels, | |
d62a17ae | 3048 | struct attr *attr) |
3049 | { | |
3050 | int len; | |
3051 | char temp[16]; | |
3052 | struct evpn_addr *p_evpn_p; | |
3053 | ||
3054 | memset(&temp, 0, 16); | |
b03b8898 | 3055 | if (p->family != AF_EVPN) |
d62a17ae | 3056 | return; |
3057 | p_evpn_p = &(p->u.prefix_evpn); | |
3058 | ||
e9fc2840 | 3059 | /* len denites the total len of IP and GW-IP in the route |
523cafc4 | 3060 | IP and GW-IP have to be both ipv4 or ipv6 |
3061 | */ | |
d62a17ae | 3062 | if (IS_IPADDR_V4(&p_evpn_p->ip)) |
e9fc2840 | 3063 | len = 8; /* IP and GWIP are both ipv4 */ |
d62a17ae | 3064 | else |
e9fc2840 | 3065 | len = 32; /* IP and GWIP are both ipv6 */ |
d62a17ae | 3066 | /* Prefix contains RD, ESI, EthTag, IP length, IP, GWIP and VNI */ |
3067 | stream_putc(s, 8 + 10 + 4 + 1 + len + 3); | |
3068 | stream_put(s, prd->val, 8); | |
0af35d90 | 3069 | if (attr) |
d62a17ae | 3070 | stream_put(s, &(attr->evpn_overlay.eth_s_id), 10); |
3071 | else | |
3072 | stream_put(s, &temp, 10); | |
3073 | stream_putl(s, p_evpn_p->eth_tag); | |
3074 | stream_putc(s, p_evpn_p->ip_prefix_length); | |
3075 | if (IS_IPADDR_V4(&p_evpn_p->ip)) | |
3076 | stream_put_ipv4(s, p_evpn_p->ip.ipaddr_v4.s_addr); | |
3077 | else | |
3078 | stream_put(s, &p_evpn_p->ip.ipaddr_v6, 16); | |
0af35d90 | 3079 | if (attr) { |
d62a17ae | 3080 | if (IS_IPADDR_V4(&p_evpn_p->ip)) |
3081 | stream_put_ipv4(s, | |
3082 | attr->evpn_overlay.gw_ip.ipv4.s_addr); | |
3083 | else | |
3084 | stream_put(s, &(attr->evpn_overlay.gw_ip.ipv6), 16); | |
3085 | } else { | |
3086 | if (IS_IPADDR_V4(&p_evpn_p->ip)) | |
3087 | stream_put_ipv4(s, 0); | |
3088 | else | |
3089 | stream_put(s, &temp, 16); | |
3090 | } | |
3091 | ||
b57ba6d2 | 3092 | if (num_labels) |
d62a17ae | 3093 | stream_put(s, label, 3); |
3094 | else | |
3095 | stream_put3(s, 0); | |
128ea8ab | 3096 | } |
3097 | ||
3098 | /* | |
3099 | * Cleanup specific VNI upon EVPN (advertise-all-vni) being disabled. | |
3100 | */ | |
d62a17ae | 3101 | static void cleanup_vni_on_disable(struct hash_backet *backet, struct bgp *bgp) |
128ea8ab | 3102 | { |
d62a17ae | 3103 | struct bgpevpn *vpn = (struct bgpevpn *)backet->data; |
128ea8ab | 3104 | |
d62a17ae | 3105 | /* Remove EVPN routes and schedule for processing. */ |
3106 | delete_routes_for_vni(bgp, vpn); | |
128ea8ab | 3107 | |
d62a17ae | 3108 | /* Clear "live" flag and see if hash needs to be freed. */ |
3109 | UNSET_FLAG(vpn->flags, VNI_FLAG_LIVE); | |
3110 | if (!is_vni_configured(vpn)) | |
3111 | bgp_evpn_free(bgp, vpn); | |
128ea8ab | 3112 | } |
3113 | ||
3114 | /* | |
3115 | * Free a VNI entry; iterator function called during cleanup. | |
3116 | */ | |
d62a17ae | 3117 | static void free_vni_entry(struct hash_backet *backet, struct bgp *bgp) |
128ea8ab | 3118 | { |
d62a17ae | 3119 | struct bgpevpn *vpn; |
128ea8ab | 3120 | |
d62a17ae | 3121 | vpn = (struct bgpevpn *)backet->data; |
3122 | delete_all_vni_routes(bgp, vpn); | |
3123 | bgp_evpn_free(bgp, vpn); | |
128ea8ab | 3124 | } |
3125 | ||
c581d8b0 MK |
3126 | /* |
3127 | * Derive AUTO import RT for BGP VRF - L3VNI | |
3128 | */ | |
3129 | static void evpn_auto_rt_import_add_for_vrf(struct bgp *bgp_vrf) | |
3130 | { | |
10ebe1ab MK |
3131 | struct bgp *bgp_def = NULL; |
3132 | ||
c581d8b0 | 3133 | form_auto_rt(bgp_vrf, bgp_vrf->l3vni, bgp_vrf->vrf_import_rtl); |
10ebe1ab MK |
3134 | UNSET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_IMPORT_RT_CFGD); |
3135 | ||
3136 | /* Map RT to VRF */ | |
3137 | bgp_def = bgp_get_default(); | |
3138 | if (!bgp_def) | |
3139 | return; | |
3140 | bgp_evpn_map_vrf_to_its_rts(bgp_vrf); | |
c581d8b0 MK |
3141 | } |
3142 | ||
3143 | /* | |
3144 | * Delete AUTO import RT from BGP VRF - L3VNI | |
3145 | */ | |
3146 | static void evpn_auto_rt_import_delete_for_vrf(struct bgp *bgp_vrf) | |
3147 | { | |
3148 | evpn_rt_delete_auto(bgp_vrf, bgp_vrf->l3vni, bgp_vrf->vrf_import_rtl); | |
3149 | } | |
3150 | ||
3151 | /* | |
3152 | * Derive AUTO export RT for BGP VRF - L3VNI | |
3153 | */ | |
3154 | static void evpn_auto_rt_export_add_for_vrf(struct bgp *bgp_vrf) | |
3155 | { | |
3156 | UNSET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_EXPORT_RT_CFGD); | |
3157 | form_auto_rt(bgp_vrf, bgp_vrf->l3vni, bgp_vrf->vrf_export_rtl); | |
3158 | } | |
3159 | ||
3160 | /* | |
3161 | * Delete AUTO export RT from BGP VRF - L3VNI | |
3162 | */ | |
3163 | static void evpn_auto_rt_export_delete_for_vrf(struct bgp *bgp_vrf) | |
3164 | { | |
3165 | evpn_rt_delete_auto(bgp_vrf, bgp_vrf->l3vni, bgp_vrf->vrf_export_rtl); | |
3166 | } | |
128ea8ab | 3167 | |
f1f8b53c MK |
3168 | static void bgp_evpn_handle_export_rt_change_for_vrf(struct bgp *bgp_vrf) |
3169 | { | |
3170 | struct bgp *bgp_def = NULL; | |
3171 | struct listnode *node = NULL; | |
3172 | struct bgpevpn *vpn = NULL; | |
3173 | ||
3174 | bgp_def = bgp_get_default(); | |
3175 | if (!bgp_def) | |
3176 | return; | |
3177 | ||
4992b4ae MK |
3178 | /* update all type-5 routes */ |
3179 | update_advertise_vrf_routes(bgp_vrf); | |
3180 | ||
3181 | /* update all type-2 routes */ | |
f1f8b53c MK |
3182 | for (ALL_LIST_ELEMENTS_RO(bgp_vrf->l2vnis, node, vpn)) |
3183 | update_routes_for_vni(bgp_def, vpn); | |
3184 | } | |
3185 | ||
128ea8ab | 3186 | /* |
3187 | * Public functions. | |
3188 | */ | |
3189 | ||
5424b7ba MK |
3190 | /* withdraw type-5 route corresponding to ip prefix */ |
3191 | void bgp_evpn_withdraw_type5_route(struct bgp *bgp_vrf, struct bgp_node *rn, | |
3192 | afi_t afi, safi_t safi) | |
3193 | { | |
3194 | int ret = 0; | |
3195 | struct prefix_evpn evp; | |
3196 | char buf[PREFIX_STRLEN]; | |
3197 | ||
3198 | build_type5_prefix_from_ip_prefix(&evp, &rn->p); | |
3199 | ret = delete_evpn_type5_route(bgp_vrf, &evp); | |
3200 | if (ret) { | |
3201 | zlog_err( | |
3202 | "%u failed to delete type-5 route for prefix %s in vrf %s", | |
3203 | bgp_vrf->vrf_id, | |
3204 | prefix2str(&rn->p, buf, sizeof(buf)), | |
3205 | vrf_id_to_name(bgp_vrf->vrf_id)); | |
3206 | } | |
3207 | } | |
3208 | ||
342dd0c6 | 3209 | /* withdraw all type-5 routes for an address family */ |
3210 | void bgp_evpn_withdraw_type5_routes(struct bgp *bgp_vrf, | |
053905d2 | 3211 | afi_t afi, safi_t safi) |
342dd0c6 | 3212 | { |
3213 | struct bgp_table *table = NULL; | |
3214 | struct bgp_node *rn = NULL; | |
3215 | ||
06d2e8f3 MK |
3216 | if (!advertise_type5_routes(bgp_vrf, afi)) |
3217 | return; | |
3218 | ||
053905d2 | 3219 | table = bgp_vrf->rib[afi][safi]; |
5424b7ba MK |
3220 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) |
3221 | bgp_evpn_withdraw_type5_route(bgp_vrf, rn, afi, safi); | |
342dd0c6 | 3222 | |
5424b7ba | 3223 | } |
342dd0c6 | 3224 | |
5424b7ba MK |
3225 | /* advertise ip prefix as type-5 route*/ |
3226 | void bgp_evpn_advertise_type5_route(struct bgp *bgp_vrf, struct bgp_node *rn, | |
3227 | afi_t afi, safi_t safi) | |
3228 | { | |
3229 | int ret = 0; | |
3230 | struct prefix_evpn evp; | |
3231 | char buf[PREFIX_STRLEN]; | |
3232 | ||
3233 | if (!advertise_type5_routes(bgp_vrf, afi)) | |
3234 | return; | |
3235 | ||
3236 | if (!rn->info) | |
3237 | return; | |
3238 | ||
3239 | /* only advertise subnet routes as type-5 */ | |
3240 | if (is_host_route(&rn->p)) | |
3241 | return; | |
3242 | ||
3243 | build_type5_prefix_from_ip_prefix(&evp, &rn->p); | |
3244 | ret = update_evpn_type5_route(bgp_vrf, &evp); | |
3245 | if (ret) { | |
3246 | zlog_err( | |
3247 | "%u failed to create type-5 route for prefix %s in vrf %s", | |
3248 | bgp_vrf->vrf_id, | |
3249 | prefix2str(&rn->p, buf, sizeof(buf)), | |
3250 | vrf_id_to_name(bgp_vrf->vrf_id)); | |
342dd0c6 | 3251 | } |
3252 | } | |
3253 | ||
3254 | /* advertise all type-5 routes for an address family */ | |
3255 | void bgp_evpn_advertise_type5_routes(struct bgp *bgp_vrf, | |
053905d2 | 3256 | afi_t afi, safi_t safi) |
342dd0c6 | 3257 | { |
3258 | struct bgp_table *table = NULL; | |
3259 | struct bgp_node *rn = NULL; | |
3260 | ||
053905d2 | 3261 | table = bgp_vrf->rib[afi][safi]; |
5424b7ba MK |
3262 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) |
3263 | bgp_evpn_advertise_type5_route(bgp_vrf, rn, afi, safi); | |
342dd0c6 | 3264 | } |
3265 | ||
c581d8b0 MK |
3266 | void evpn_rt_delete_auto(struct bgp *bgp, vni_t vni, |
3267 | struct list *rtl) | |
3268 | { | |
3269 | struct listnode *node, *nnode, *node_to_del; | |
3270 | struct ecommunity *ecom, *ecom_auto; | |
3271 | struct ecommunity_val eval; | |
3272 | ||
3273 | encode_route_target_as((bgp->as & 0xFFFF), vni, &eval); | |
3274 | ||
3275 | ecom_auto = ecommunity_new(); | |
3276 | ecommunity_add_val(ecom_auto, &eval); | |
3277 | node_to_del = NULL; | |
3278 | ||
3279 | for (ALL_LIST_ELEMENTS(rtl, node, nnode, ecom)) { | |
3280 | if (ecommunity_match(ecom, ecom_auto)) { | |
3281 | ecommunity_free(&ecom); | |
3282 | node_to_del = node; | |
3283 | } | |
3284 | } | |
3285 | ||
3286 | if (node_to_del) | |
3287 | list_delete_node(rtl, node_to_del); | |
3288 | ||
3289 | ecommunity_free(&ecom_auto); | |
3290 | } | |
3291 | ||
3292 | void bgp_evpn_configure_import_rt_for_vrf(struct bgp *bgp_vrf, | |
10ebe1ab | 3293 | struct ecommunity *ecomadd) |
c581d8b0 | 3294 | { |
5ba238b7 MK |
3295 | /* uninstall routes from vrf */ |
3296 | uninstall_routes_for_vrf(bgp_vrf); | |
10ebe1ab MK |
3297 | |
3298 | /* Cleanup the RT to VRF mapping */ | |
3299 | bgp_evpn_unmap_vrf_from_its_rts(bgp_vrf); | |
3300 | ||
c581d8b0 MK |
3301 | /* Remove auto generated RT */ |
3302 | evpn_auto_rt_import_delete_for_vrf(bgp_vrf); | |
3303 | ||
3304 | /* Add the newly configured RT to RT list */ | |
3305 | listnode_add_sort(bgp_vrf->vrf_import_rtl, ecomadd); | |
3306 | SET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_IMPORT_RT_CFGD); | |
3307 | ||
10ebe1ab MK |
3308 | /* map VRF to its RTs */ |
3309 | bgp_evpn_map_vrf_to_its_rts(bgp_vrf); | |
3310 | ||
5ba238b7 MK |
3311 | /* install routes matching the new VRF */ |
3312 | install_routes_for_vrf(bgp_vrf); | |
c581d8b0 MK |
3313 | } |
3314 | ||
3315 | void bgp_evpn_unconfigure_import_rt_for_vrf(struct bgp *bgp_vrf, | |
3316 | struct ecommunity *ecomdel) | |
3317 | { | |
3318 | struct listnode *node = NULL, *nnode = NULL, *node_to_del = NULL; | |
3319 | struct ecommunity *ecom = NULL; | |
3320 | ||
5ba238b7 MK |
3321 | /* uninstall routes from vrf */ |
3322 | uninstall_routes_for_vrf(bgp_vrf); | |
10ebe1ab MK |
3323 | |
3324 | /* Cleanup the RT to VRF mapping */ | |
3325 | bgp_evpn_unmap_vrf_from_its_rts(bgp_vrf); | |
3326 | ||
c581d8b0 MK |
3327 | /* remove the RT from the RT list */ |
3328 | for (ALL_LIST_ELEMENTS(bgp_vrf->vrf_import_rtl, node, nnode, ecom)) { | |
3329 | if (ecommunity_match(ecom, ecomdel)) { | |
3330 | ecommunity_free(&ecom); | |
3331 | node_to_del = node; | |
3332 | break; | |
3333 | } | |
3334 | } | |
3335 | ||
3336 | if (node_to_del) | |
3337 | list_delete_node(bgp_vrf->vrf_import_rtl, node_to_del); | |
3338 | ||
3339 | /* fallback to auto import rt, if this was the last RT */ | |
3340 | if (list_isempty(bgp_vrf->vrf_import_rtl)) { | |
3341 | UNSET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_IMPORT_RT_CFGD); | |
3342 | evpn_auto_rt_import_add_for_vrf(bgp_vrf); | |
3343 | } | |
3344 | ||
10ebe1ab MK |
3345 | /* map VRFs to its RTs */ |
3346 | bgp_evpn_map_vrf_to_its_rts(bgp_vrf); | |
3347 | ||
5ba238b7 MK |
3348 | /* install routes matching this new RT */ |
3349 | install_routes_for_vrf(bgp_vrf); | |
c581d8b0 MK |
3350 | } |
3351 | ||
3352 | void bgp_evpn_configure_export_rt_for_vrf(struct bgp *bgp_vrf, | |
3353 | struct ecommunity *ecomadd) | |
3354 | { | |
3355 | /* remove auto-generated RT */ | |
3356 | evpn_auto_rt_export_delete_for_vrf(bgp_vrf); | |
3357 | ||
3358 | /* Add the new RT to the RT list */ | |
3359 | listnode_add_sort(bgp_vrf->vrf_export_rtl, ecomadd); | |
3360 | SET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_EXPORT_RT_CFGD); | |
3361 | ||
f1f8b53c MK |
3362 | bgp_evpn_handle_export_rt_change_for_vrf(bgp_vrf); |
3363 | ||
c581d8b0 MK |
3364 | } |
3365 | ||
3366 | void bgp_evpn_unconfigure_export_rt_for_vrf(struct bgp *bgp_vrf, | |
3367 | struct ecommunity *ecomdel) | |
3368 | { | |
3369 | struct listnode *node = NULL, *nnode = NULL, *node_to_del = NULL; | |
3370 | struct ecommunity *ecom = NULL; | |
3371 | ||
3372 | /* Remove the RT from the RT list */ | |
3373 | for (ALL_LIST_ELEMENTS(bgp_vrf->vrf_export_rtl, node, nnode, ecom)) { | |
3374 | if (ecommunity_match(ecom, ecomdel)) { | |
3375 | ecommunity_free(&ecom); | |
3376 | node_to_del = node; | |
3377 | break; | |
3378 | } | |
3379 | } | |
3380 | ||
3381 | if (node_to_del) | |
3382 | list_delete_node(bgp_vrf->vrf_export_rtl, node_to_del); | |
3383 | ||
3384 | /* fall back to auto-generated RT if this was the last RT */ | |
877702e7 | 3385 | if (bgp_vrf->vrf_export_rtl && list_isempty(bgp_vrf->vrf_export_rtl)) { |
c581d8b0 MK |
3386 | UNSET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_EXPORT_RT_CFGD); |
3387 | evpn_auto_rt_export_add_for_vrf(bgp_vrf); | |
3388 | } | |
3389 | ||
f1f8b53c | 3390 | bgp_evpn_handle_export_rt_change_for_vrf(bgp_vrf); |
c581d8b0 MK |
3391 | } |
3392 | ||
2d48ee25 | 3393 | /* |
3394 | * Handle change to BGP router id. This is invoked twice by the change | |
3395 | * handler, first before the router id has been changed and then after | |
3396 | * the router id has been changed. The first invocation will result in | |
676f83b9 | 3397 | * local routes for all VNIs/VRF being deleted and withdrawn and the next |
2d48ee25 | 3398 | * will result in the routes being re-advertised. |
3399 | */ | |
d62a17ae | 3400 | void bgp_evpn_handle_router_id_update(struct bgp *bgp, int withdraw) |
2d48ee25 | 3401 | { |
676f83b9 | 3402 | if (withdraw) { |
3403 | ||
3404 | /* delete and withdraw all the type-5 routes | |
523cafc4 | 3405 | stored in the global table for this vrf |
3406 | */ | |
80b140af | 3407 | withdraw_router_id_vrf(bgp); |
676f83b9 | 3408 | |
3409 | /* delete all the VNI routes (type-2/type-3) routes for all the | |
523cafc4 | 3410 | * L2-VNIs |
3411 | */ | |
d62a17ae | 3412 | hash_iterate(bgp->vnihash, |
3413 | (void (*)(struct hash_backet *, | |
3414 | void *))withdraw_router_id_vni, | |
3415 | bgp); | |
676f83b9 | 3416 | } else { |
3417 | ||
3418 | /* advertise all routes in the vrf as type-5 routes with the new | |
523cafc4 | 3419 | * RD |
3420 | */ | |
80b140af | 3421 | update_router_id_vrf(bgp); |
676f83b9 | 3422 | |
3423 | /* advertise all the VNI routes (type-2/type-3) routes with the | |
523cafc4 | 3424 | * new RD |
3425 | */ | |
d62a17ae | 3426 | hash_iterate(bgp->vnihash, |
3427 | (void (*)(struct hash_backet *, | |
3428 | void *))update_router_id_vni, | |
3429 | bgp); | |
676f83b9 | 3430 | } |
2d48ee25 | 3431 | } |
3432 | ||
90e60aa7 | 3433 | /* |
3434 | * Handle change to export RT - update and advertise local routes. | |
3435 | */ | |
d62a17ae | 3436 | int bgp_evpn_handle_export_rt_change(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 3437 | { |
d62a17ae | 3438 | return update_routes_for_vni(bgp, vpn); |
90e60aa7 | 3439 | } |
3440 | ||
676f83b9 | 3441 | void bgp_evpn_handle_vrf_rd_change(struct bgp *bgp_vrf, |
3442 | int withdraw) | |
3443 | { | |
3444 | if (withdraw) | |
3445 | delete_withdraw_vrf_routes(bgp_vrf); | |
3446 | else | |
3447 | update_advertise_vrf_routes(bgp_vrf); | |
3448 | } | |
3449 | ||
90e60aa7 | 3450 | /* |
3451 | * Handle change to RD. This is invoked twice by the change handler, | |
3452 | * first before the RD has been changed and then after the RD has | |
3453 | * been changed. The first invocation will result in local routes | |
3454 | * of this VNI being deleted and withdrawn and the next will result | |
3455 | * in the routes being re-advertised. | |
3456 | */ | |
d62a17ae | 3457 | void bgp_evpn_handle_rd_change(struct bgp *bgp, struct bgpevpn *vpn, |
3458 | int withdraw) | |
90e60aa7 | 3459 | { |
d62a17ae | 3460 | if (withdraw) |
3461 | delete_withdraw_vni_routes(bgp, vpn); | |
3462 | else | |
3463 | update_advertise_vni_routes(bgp, vpn); | |
90e60aa7 | 3464 | } |
3465 | ||
3466 | /* | |
3467 | * Install routes for this VNI. Invoked upon change to Import RT. | |
3468 | */ | |
d62a17ae | 3469 | int bgp_evpn_install_routes(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 3470 | { |
d62a17ae | 3471 | return install_routes_for_vni(bgp, vpn); |
90e60aa7 | 3472 | } |
3473 | ||
3474 | /* | |
3475 | * Uninstall all routes installed for this VNI. Invoked upon change | |
3476 | * to Import RT. | |
3477 | */ | |
d62a17ae | 3478 | int bgp_evpn_uninstall_routes(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 3479 | { |
d62a17ae | 3480 | return uninstall_routes_for_vni(bgp, vpn); |
90e60aa7 | 3481 | } |
3482 | ||
b16031a2 | 3483 | /* |
b57ba6d2 | 3484 | * TODO: Hardcoded for a maximum of 2 VNIs right now |
b16031a2 | 3485 | */ |
b57ba6d2 MK |
3486 | char *bgp_evpn_label2str(mpls_label_t *label, u_int32_t num_labels, |
3487 | char *buf, int len) | |
b16031a2 | 3488 | { |
d62a17ae | 3489 | vni_t vni; |
b57ba6d2 | 3490 | vni_t vni1, vni2; |
b16031a2 | 3491 | |
b57ba6d2 MK |
3492 | vni1 = label2vni(label); |
3493 | if (num_labels == 2) { | |
3494 | vni2 = label2vni(label+1); | |
3495 | snprintf(buf, len, "%u/%u", vni1, vni2); | |
3496 | } else | |
3497 | snprintf(buf, len, "%u", vni1); | |
d62a17ae | 3498 | return buf; |
b16031a2 | 3499 | } |
3500 | ||
9c92b5f7 MK |
3501 | /* |
3502 | * Function to convert evpn route to json format. | |
3503 | * NOTE: We don't use prefix2str as the output here is a bit different. | |
3504 | */ | |
57f7feb6 | 3505 | void bgp_evpn_route2json(struct prefix_evpn *p, json_object *json) |
9c92b5f7 | 3506 | { |
b682f6de | 3507 | char buf1[ETHER_ADDR_STRLEN]; |
3508 | char buf2[PREFIX2STR_BUFFER]; | |
9c92b5f7 | 3509 | |
b682f6de | 3510 | if (!json) |
3511 | return; | |
9c92b5f7 | 3512 | |
dff8f48d | 3513 | if (p->prefix.route_type == BGP_EVPN_IMET_ROUTE) { |
b682f6de | 3514 | json_object_int_add(json, "routeType", p->prefix.route_type); |
3515 | json_object_int_add(json, "ethTag", 0); | |
57f7feb6 MK |
3516 | json_object_int_add(json, "ipLen", |
3517 | IS_EVPN_PREFIX_IPADDR_V4(p) | |
3518 | ? IPV4_MAX_BITLEN | |
3519 | : IPV6_MAX_BITLEN); | |
b682f6de | 3520 | json_object_string_add(json, "ip", |
57f7feb6 MK |
3521 | inet_ntoa(p->prefix.ip.ipaddr_v4)); |
3522 | } else if (p->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) { | |
dff8f48d | 3523 | if (IS_EVPN_PREFIX_IPADDR_NONE(p)) { |
57f7feb6 MK |
3524 | json_object_int_add(json, "routeType", |
3525 | p->prefix.route_type); | |
3526 | json_object_int_add( | |
3527 | json, "esi", | |
3528 | 0); /* TODO: we don't support esi yet */ | |
3529 | json_object_int_add(json, "ethTag", 0); | |
3530 | json_object_int_add(json, "macLen", 8 * ETH_ALEN); | |
3531 | json_object_string_add(json, "mac", | |
3532 | prefix_mac2str(&p->prefix.mac, | |
3533 | buf1, | |
3534 | sizeof(buf1))); | |
dff8f48d MK |
3535 | } else { |
3536 | u_char family; | |
3537 | ||
57f7feb6 MK |
3538 | family = IS_EVPN_PREFIX_IPADDR_V4(p) ? AF_INET |
3539 | : AF_INET6; | |
dff8f48d | 3540 | |
b682f6de | 3541 | json_object_int_add(json, "routeType", |
57f7feb6 MK |
3542 | p->prefix.route_type); |
3543 | json_object_int_add( | |
3544 | json, "esi", | |
3545 | 0); /* TODO: we don't support esi yet */ | |
b682f6de | 3546 | json_object_int_add(json, "ethTag", 0); |
57f7feb6 | 3547 | json_object_int_add(json, "macLen", 8 * ETH_ALEN); |
b682f6de | 3548 | json_object_string_add(json, "mac", |
57f7feb6 MK |
3549 | prefix_mac2str(&p->prefix.mac, |
3550 | buf1, | |
3551 | sizeof(buf1))); | |
b682f6de | 3552 | json_object_int_add(json, "ipLen", |
57f7feb6 MK |
3553 | IS_EVPN_PREFIX_IPADDR_V4(p) |
3554 | ? IPV4_MAX_BITLEN | |
3555 | : IPV6_MAX_BITLEN); | |
3556 | json_object_string_add( | |
3557 | json, "ip", | |
3558 | inet_ntop(family, &p->prefix.ip.ip.addr, buf2, | |
3559 | PREFIX2STR_BUFFER)); | |
dff8f48d MK |
3560 | } |
3561 | } else { | |
3562 | /* Currently, this is to cater to other AF_ETHERNET code. */ | |
3563 | } | |
9c92b5f7 MK |
3564 | } |
3565 | ||
520d5d76 | 3566 | /* |
3567 | * Function to convert evpn route to string. | |
3568 | * NOTE: We don't use prefix2str as the output here is a bit different. | |
3569 | */ | |
d62a17ae | 3570 | char *bgp_evpn_route2str(struct prefix_evpn *p, char *buf, int len) |
3571 | { | |
3572 | char buf1[ETHER_ADDR_STRLEN]; | |
3573 | char buf2[PREFIX2STR_BUFFER]; | |
3574 | ||
3575 | if (p->prefix.route_type == BGP_EVPN_IMET_ROUTE) { | |
3576 | snprintf(buf, len, "[%d]:[0]:[%d]:[%s]", p->prefix.route_type, | |
3577 | IS_EVPN_PREFIX_IPADDR_V4(p) ? IPV4_MAX_BITLEN | |
3578 | : IPV6_MAX_BITLEN, | |
3579 | inet_ntoa(p->prefix.ip.ipaddr_v4)); | |
3580 | } else if (p->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) { | |
3581 | if (IS_EVPN_PREFIX_IPADDR_NONE(p)) | |
3582 | snprintf(buf, len, "[%d]:[0]:[0]:[%d]:[%s]", | |
28328ea9 | 3583 | p->prefix.route_type, 8 * ETH_ALEN, |
d62a17ae | 3584 | prefix_mac2str(&p->prefix.mac, buf1, |
3585 | sizeof(buf1))); | |
3586 | else { | |
3587 | u_char family; | |
3588 | ||
3589 | family = IS_EVPN_PREFIX_IPADDR_V4(p) ? AF_INET | |
3590 | : AF_INET6; | |
3591 | snprintf(buf, len, "[%d]:[0]:[0]:[%d]:[%s]:[%d]:[%s]", | |
28328ea9 | 3592 | p->prefix.route_type, 8 * ETH_ALEN, |
d62a17ae | 3593 | prefix_mac2str(&p->prefix.mac, buf1, |
3594 | sizeof(buf1)), | |
3595 | family == AF_INET ? IPV4_MAX_BITLEN | |
3596 | : IPV6_MAX_BITLEN, | |
3597 | inet_ntop(family, &p->prefix.ip.ip.addr, buf2, | |
3598 | PREFIX2STR_BUFFER)); | |
3599 | } | |
342dd0c6 | 3600 | } else if (p->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE) { |
3601 | snprintf(buf, len, "[%d]:[0]:[%d]:[%s]", | |
3602 | p->prefix.route_type, | |
3603 | p->prefix.ip_prefix_length, | |
3604 | IS_EVPN_PREFIX_IPADDR_V4(p) ? | |
3605 | inet_ntoa(p->prefix.ip.ipaddr_v4) : | |
3606 | inet6_ntoa(p->prefix.ip.ipaddr_v6)); | |
d62a17ae | 3607 | } else { |
b03b8898 | 3608 | /* For EVPN route types not supported yet. */ |
f9aa3e55 QY |
3609 | snprintf(buf, len, "(unsupported route type %d)", |
3610 | p->prefix.route_type); | |
d62a17ae | 3611 | } |
3612 | ||
3613 | return (buf); | |
520d5d76 | 3614 | } |
3615 | ||
128ea8ab | 3616 | /* |
3617 | * Encode EVPN prefix in Update (MP_REACH) | |
3618 | */ | |
d62a17ae | 3619 | void bgp_evpn_encode_prefix(struct stream *s, struct prefix *p, |
b57ba6d2 MK |
3620 | struct prefix_rd *prd, |
3621 | mpls_label_t *label, u_int32_t num_labels, | |
d62a17ae | 3622 | struct attr *attr, int addpath_encode, |
3623 | u_int32_t addpath_tx_id) | |
3624 | { | |
3625 | struct prefix_evpn *evp = (struct prefix_evpn *)p; | |
b57ba6d2 | 3626 | int len, ipa_len = 0; |
d62a17ae | 3627 | |
3628 | if (addpath_encode) | |
3629 | stream_putl(s, addpath_tx_id); | |
3630 | ||
3631 | /* Route type */ | |
3632 | stream_putc(s, evp->prefix.route_type); | |
3633 | ||
3634 | switch (evp->prefix.route_type) { | |
3635 | case BGP_EVPN_MAC_IP_ROUTE: | |
3636 | if (IS_EVPN_PREFIX_IPADDR_V4(evp)) | |
3637 | ipa_len = IPV4_MAX_BYTELEN; | |
3638 | else if (IS_EVPN_PREFIX_IPADDR_V6(evp)) | |
3639 | ipa_len = IPV6_MAX_BYTELEN; | |
b57ba6d2 MK |
3640 | /* RD, ESI, EthTag, MAC+len, IP len, [IP], 1 VNI */ |
3641 | len = 8 + 10 + 4 + 1 + 6 + 1 + ipa_len + 3; | |
3642 | if (ipa_len && num_labels > 1) /* There are 2 VNIs */ | |
3643 | len += 3; | |
3644 | stream_putc(s, len); | |
d62a17ae | 3645 | stream_put(s, prd->val, 8); /* RD */ |
3646 | stream_put(s, 0, 10); /* ESI */ | |
3647 | stream_putl(s, 0); /* Ethernet Tag ID */ | |
28328ea9 | 3648 | stream_putc(s, 8 * ETH_ALEN); /* Mac Addr Len - bits */ |
d62a17ae | 3649 | stream_put(s, evp->prefix.mac.octet, 6); /* Mac Addr */ |
3650 | stream_putc(s, 8 * ipa_len); /* IP address Length */ | |
b57ba6d2 MK |
3651 | if (ipa_len) /* IP */ |
3652 | stream_put(s, &evp->prefix.ip.ip.addr, ipa_len); | |
3653 | /* 1st label is the L2 VNI */ | |
3654 | stream_put(s, label, BGP_LABEL_BYTES); | |
3655 | /* Include 2nd label (L3 VNI) if advertising MAC+IP */ | |
3656 | if (ipa_len && num_labels > 1) | |
3657 | stream_put(s, label+1, BGP_LABEL_BYTES); | |
d62a17ae | 3658 | break; |
3659 | ||
3660 | case BGP_EVPN_IMET_ROUTE: | |
3661 | stream_putc(s, 17); // TODO: length - assumes IPv4 address | |
3662 | stream_put(s, prd->val, 8); /* RD */ | |
3663 | stream_putl(s, 0); /* Ethernet Tag ID */ | |
3664 | stream_putc(s, IPV4_MAX_BITLEN); /* IP address Length - bits */ | |
3665 | /* Originating Router's IP Addr */ | |
3666 | stream_put_in_addr(s, &evp->prefix.ip.ipaddr_v4); | |
3667 | break; | |
3668 | ||
3669 | case BGP_EVPN_IP_PREFIX_ROUTE: | |
3670 | /* TODO: AddPath support. */ | |
b57ba6d2 | 3671 | evpn_mpattr_encode_type5(s, p, prd, label, num_labels, attr); |
d62a17ae | 3672 | break; |
3673 | ||
3674 | default: | |
3675 | break; | |
3676 | } | |
3677 | } | |
3678 | ||
3679 | int bgp_nlri_parse_evpn(struct peer *peer, struct attr *attr, | |
3680 | struct bgp_nlri *packet, int withdraw) | |
3681 | { | |
3682 | u_char *pnt; | |
3683 | u_char *lim; | |
3684 | afi_t afi; | |
3685 | safi_t safi; | |
3686 | u_int32_t addpath_id; | |
3687 | int addpath_encoded; | |
3688 | int psize = 0; | |
3689 | u_char rtype; | |
3690 | u_char rlen; | |
3691 | struct prefix p; | |
3692 | ||
3693 | /* Check peer status. */ | |
3694 | if (peer->status != Established) { | |
3695 | zlog_err("%u:%s - EVPN update received in state %d", | |
3696 | peer->bgp->vrf_id, peer->host, peer->status); | |
3697 | return -1; | |
3698 | } | |
3699 | ||
3700 | /* Start processing the NLRI - there may be multiple in the MP_REACH */ | |
3701 | pnt = packet->nlri; | |
3702 | lim = pnt + packet->length; | |
3703 | afi = packet->afi; | |
3704 | safi = packet->safi; | |
3705 | addpath_id = 0; | |
3706 | ||
3707 | addpath_encoded = | |
3708 | (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ADDPATH_AF_RX_ADV) | |
3709 | && CHECK_FLAG(peer->af_cap[afi][safi], | |
3710 | PEER_CAP_ADDPATH_AF_TX_RCV)); | |
3711 | ||
3712 | for (; pnt < lim; pnt += psize) { | |
3713 | /* Clear prefix structure. */ | |
3714 | memset(&p, 0, sizeof(struct prefix)); | |
3715 | ||
3716 | /* Deal with path-id if AddPath is supported. */ | |
3717 | if (addpath_encoded) { | |
3718 | /* When packet overflow occurs return immediately. */ | |
3719 | if (pnt + BGP_ADDPATH_ID_LEN > lim) | |
3720 | return -1; | |
3721 | ||
3722 | addpath_id = ntohl(*((uint32_t *)pnt)); | |
3723 | pnt += BGP_ADDPATH_ID_LEN; | |
3724 | } | |
3725 | ||
3726 | /* All EVPN NLRI types start with type and length. */ | |
3727 | if (pnt + 2 > lim) | |
3728 | return -1; | |
3729 | ||
3730 | rtype = *pnt++; | |
3731 | psize = rlen = *pnt++; | |
3732 | ||
3733 | /* When packet overflow occur return immediately. */ | |
3734 | if (pnt + psize > lim) | |
3735 | return -1; | |
3736 | ||
3737 | switch (rtype) { | |
3738 | case BGP_EVPN_MAC_IP_ROUTE: | |
3739 | if (process_type2_route(peer, afi, safi, | |
3740 | withdraw ? NULL : attr, pnt, | |
3741 | psize, addpath_id)) { | |
3742 | zlog_err( | |
3743 | "%u:%s - Error in processing EVPN type-2 NLRI size %d", | |
3744 | peer->bgp->vrf_id, peer->host, psize); | |
3745 | return -1; | |
3746 | } | |
3747 | break; | |
3748 | ||
3749 | case BGP_EVPN_IMET_ROUTE: | |
3750 | if (process_type3_route(peer, afi, safi, | |
3751 | withdraw ? NULL : attr, pnt, | |
3752 | psize, addpath_id)) { | |
3753 | zlog_err( | |
3754 | "%u:%s - Error in processing EVPN type-3 NLRI size %d", | |
3755 | peer->bgp->vrf_id, peer->host, psize); | |
3756 | return -1; | |
3757 | } | |
3758 | break; | |
3759 | ||
3760 | case BGP_EVPN_IP_PREFIX_ROUTE: | |
3761 | if (process_type5_route(peer, afi, safi, attr, pnt, | |
3762 | psize, addpath_id, withdraw)) { | |
3763 | zlog_err( | |
3764 | "%u:%s - Error in processing EVPN type-5 NLRI size %d", | |
3765 | peer->bgp->vrf_id, peer->host, psize); | |
3766 | return -1; | |
3767 | } | |
3768 | break; | |
3769 | ||
3770 | default: | |
3771 | break; | |
3772 | } | |
3773 | } | |
3774 | ||
3775 | /* Packet length consistency check. */ | |
3776 | if (pnt != lim) | |
3777 | return -1; | |
3778 | ||
3779 | return 0; | |
128ea8ab | 3780 | } |
3781 | ||
10ebe1ab MK |
3782 | /* |
3783 | * Map the RTs (configured or automatically derived) of a VRF to the VRF. | |
3784 | * The mapping will be used during route processing. | |
3785 | * bgp_def: default bgp instance | |
3786 | * bgp_vrf: specific bgp vrf instance on which RT is configured | |
3787 | */ | |
3788 | void bgp_evpn_map_vrf_to_its_rts(struct bgp *bgp_vrf) | |
3789 | { | |
3790 | int i = 0; | |
3791 | struct ecommunity_val *eval = NULL; | |
3792 | struct listnode *node = NULL, *nnode = NULL; | |
3793 | struct ecommunity *ecom = NULL; | |
3794 | ||
3795 | for (ALL_LIST_ELEMENTS(bgp_vrf->vrf_import_rtl, node, nnode, ecom)) { | |
3796 | for (i = 0; i < ecom->size; i++) { | |
3797 | eval = (struct ecommunity_val *)(ecom->val | |
3798 | + (i | |
3799 | * ECOMMUNITY_SIZE)); | |
3800 | map_vrf_to_rt(bgp_vrf, eval); | |
3801 | } | |
3802 | } | |
3803 | } | |
3804 | ||
3805 | /* | |
3806 | * Unmap the RTs (configured or automatically derived) of a VRF from the VRF. | |
3807 | */ | |
3808 | void bgp_evpn_unmap_vrf_from_its_rts(struct bgp *bgp_vrf) | |
3809 | { | |
3810 | int i; | |
3811 | struct ecommunity_val *eval; | |
3812 | struct listnode *node, *nnode; | |
3813 | struct ecommunity *ecom; | |
3814 | ||
3815 | for (ALL_LIST_ELEMENTS(bgp_vrf->vrf_import_rtl, node, nnode, ecom)) { | |
3816 | for (i = 0; i < ecom->size; i++) { | |
3817 | struct vrf_irt_node *irt; | |
3818 | struct ecommunity_val eval_tmp; | |
3819 | ||
3820 | eval = (struct ecommunity_val *)(ecom->val | |
3821 | + (i | |
3822 | * ECOMMUNITY_SIZE)); | |
3823 | /* If using "automatic" RT, we only care about the | |
3824 | * local-admin sub-field. | |
3825 | * This is to facilitate using VNI as the RT for EBGP | |
3826 | * peering too. | |
3827 | */ | |
3828 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
3829 | if (!CHECK_FLAG(bgp_vrf->vrf_flags, | |
3830 | BGP_VRF_IMPORT_RT_CFGD)) | |
3831 | mask_ecom_global_admin(&eval_tmp, eval); | |
3832 | ||
3833 | irt = lookup_vrf_import_rt(&eval_tmp); | |
3834 | if (irt) | |
3835 | unmap_vrf_from_rt(bgp_vrf, irt); | |
3836 | } | |
3837 | } | |
3838 | } | |
3839 | ||
3840 | ||
128ea8ab | 3841 | |
3842 | /* | |
3843 | * Map the RTs (configured or automatically derived) of a VNI to the VNI. | |
3844 | * The mapping will be used during route processing. | |
3845 | */ | |
d62a17ae | 3846 | void bgp_evpn_map_vni_to_its_rts(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 3847 | { |
d62a17ae | 3848 | int i; |
3849 | struct ecommunity_val *eval; | |
3850 | struct listnode *node, *nnode; | |
3851 | struct ecommunity *ecom; | |
128ea8ab | 3852 | |
d62a17ae | 3853 | for (ALL_LIST_ELEMENTS(vpn->import_rtl, node, nnode, ecom)) { |
3854 | for (i = 0; i < ecom->size; i++) { | |
3855 | eval = (struct ecommunity_val *)(ecom->val | |
3856 | + (i | |
3857 | * ECOMMUNITY_SIZE)); | |
3858 | map_vni_to_rt(bgp, vpn, eval); | |
3859 | } | |
3860 | } | |
128ea8ab | 3861 | } |
3862 | ||
3863 | /* | |
3864 | * Unmap the RTs (configured or automatically derived) of a VNI from the VNI. | |
3865 | */ | |
d62a17ae | 3866 | void bgp_evpn_unmap_vni_from_its_rts(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 3867 | { |
d62a17ae | 3868 | int i; |
3869 | struct ecommunity_val *eval; | |
3870 | struct listnode *node, *nnode; | |
3871 | struct ecommunity *ecom; | |
128ea8ab | 3872 | |
d62a17ae | 3873 | for (ALL_LIST_ELEMENTS(vpn->import_rtl, node, nnode, ecom)) { |
3874 | for (i = 0; i < ecom->size; i++) { | |
3875 | struct irt_node *irt; | |
3876 | struct ecommunity_val eval_tmp; | |
128ea8ab | 3877 | |
d62a17ae | 3878 | eval = (struct ecommunity_val *)(ecom->val |
3879 | + (i | |
3880 | * ECOMMUNITY_SIZE)); | |
3881 | /* If using "automatic" RT, we only care about the | |
3882 | * local-admin sub-field. | |
3883 | * This is to facilitate using VNI as the RT for EBGP | |
3884 | * peering too. | |
3885 | */ | |
3886 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
3887 | if (!is_import_rt_configured(vpn)) | |
3888 | mask_ecom_global_admin(&eval_tmp, eval); | |
128ea8ab | 3889 | |
d62a17ae | 3890 | irt = lookup_import_rt(bgp, &eval_tmp); |
3891 | if (irt) | |
3892 | unmap_vni_from_rt(bgp, vpn, irt); | |
3893 | } | |
3894 | } | |
128ea8ab | 3895 | } |
3896 | ||
3897 | /* | |
3898 | * Derive Import RT automatically for VNI and map VNI to RT. | |
3899 | * The mapping will be used during route processing. | |
3900 | */ | |
d62a17ae | 3901 | void bgp_evpn_derive_auto_rt_import(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 3902 | { |
c581d8b0 | 3903 | form_auto_rt(bgp, vpn->vni, vpn->import_rtl); |
d62a17ae | 3904 | UNSET_FLAG(vpn->flags, VNI_FLAG_IMPRT_CFGD); |
128ea8ab | 3905 | |
d62a17ae | 3906 | /* Map RT to VNI */ |
3907 | bgp_evpn_map_vni_to_its_rts(bgp, vpn); | |
128ea8ab | 3908 | } |
3909 | ||
3910 | /* | |
3911 | * Derive Export RT automatically for VNI. | |
3912 | */ | |
d62a17ae | 3913 | void bgp_evpn_derive_auto_rt_export(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 3914 | { |
c581d8b0 | 3915 | form_auto_rt(bgp, vpn->vni, vpn->export_rtl); |
d62a17ae | 3916 | UNSET_FLAG(vpn->flags, VNI_FLAG_EXPRT_CFGD); |
128ea8ab | 3917 | } |
3918 | ||
676f83b9 | 3919 | /* |
3920 | * Derive RD automatically for VNI using passed information - it | |
3921 | * is of the form RouterId:unique-id-for-vni. | |
3922 | */ | |
3923 | void bgp_evpn_derive_auto_rd_for_vrf(struct bgp *bgp) | |
3924 | { | |
3925 | char buf[100]; | |
3926 | ||
3927 | bgp->vrf_prd.family = AF_UNSPEC; | |
3928 | bgp->vrf_prd.prefixlen = 64; | |
3929 | sprintf(buf, "%s:%hu", inet_ntoa(bgp->router_id), bgp->vrf_rd_id); | |
3930 | str2prefix_rd(buf, &bgp->vrf_prd); | |
3931 | } | |
3932 | ||
128ea8ab | 3933 | /* |
3934 | * Derive RD automatically for VNI using passed information - it | |
3935 | * is of the form RouterId:unique-id-for-vni. | |
3936 | */ | |
d62a17ae | 3937 | void bgp_evpn_derive_auto_rd(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 3938 | { |
d62a17ae | 3939 | char buf[100]; |
128ea8ab | 3940 | |
d62a17ae | 3941 | vpn->prd.family = AF_UNSPEC; |
3942 | vpn->prd.prefixlen = 64; | |
3943 | sprintf(buf, "%s:%hu", inet_ntoa(bgp->router_id), vpn->rd_id); | |
cbb65f5e | 3944 | (void)str2prefix_rd(buf, &vpn->prd); |
d62a17ae | 3945 | UNSET_FLAG(vpn->flags, VNI_FLAG_RD_CFGD); |
128ea8ab | 3946 | } |
3947 | ||
3948 | /* | |
3949 | * Lookup VNI. | |
3950 | */ | |
d62a17ae | 3951 | struct bgpevpn *bgp_evpn_lookup_vni(struct bgp *bgp, vni_t vni) |
128ea8ab | 3952 | { |
d62a17ae | 3953 | struct bgpevpn *vpn; |
3954 | struct bgpevpn tmp; | |
128ea8ab | 3955 | |
d62a17ae | 3956 | memset(&tmp, 0, sizeof(struct bgpevpn)); |
3957 | tmp.vni = vni; | |
3958 | vpn = hash_lookup(bgp->vnihash, &tmp); | |
3959 | return vpn; | |
128ea8ab | 3960 | } |
3961 | ||
3962 | /* | |
3963 | * Create a new vpn - invoked upon configuration or zebra notification. | |
3964 | */ | |
d62a17ae | 3965 | struct bgpevpn *bgp_evpn_new(struct bgp *bgp, vni_t vni, |
29c53922 MK |
3966 | struct in_addr originator_ip, |
3967 | vrf_id_t tenant_vrf_id) | |
128ea8ab | 3968 | { |
d62a17ae | 3969 | struct bgpevpn *vpn; |
128ea8ab | 3970 | |
d62a17ae | 3971 | if (!bgp) |
3972 | return NULL; | |
128ea8ab | 3973 | |
d62a17ae | 3974 | vpn = XCALLOC(MTYPE_BGP_EVPN, sizeof(struct bgpevpn)); |
3975 | if (!vpn) | |
3976 | return NULL; | |
128ea8ab | 3977 | |
d62a17ae | 3978 | /* Set values - RD and RT set to defaults. */ |
3979 | vpn->vni = vni; | |
3980 | vpn->originator_ip = originator_ip; | |
29c53922 | 3981 | vpn->tenant_vrf_id = tenant_vrf_id; |
128ea8ab | 3982 | |
d62a17ae | 3983 | /* Initialize route-target import and export lists */ |
3984 | vpn->import_rtl = list_new(); | |
3985 | vpn->import_rtl->cmp = (int (*)(void *, void *))evpn_route_target_cmp; | |
3986 | vpn->export_rtl = list_new(); | |
3987 | vpn->export_rtl->cmp = (int (*)(void *, void *))evpn_route_target_cmp; | |
e9eb5f63 | 3988 | bf_assign_index(bm->rd_idspace, vpn->rd_id); |
d62a17ae | 3989 | derive_rd_rt_for_vni(bgp, vpn); |
128ea8ab | 3990 | |
d62a17ae | 3991 | /* Initialize EVPN route table. */ |
3992 | vpn->route_table = bgp_table_init(AFI_L2VPN, SAFI_EVPN); | |
128ea8ab | 3993 | |
d62a17ae | 3994 | /* Add to hash */ |
3995 | if (!hash_get(bgp->vnihash, vpn, hash_alloc_intern)) { | |
3996 | XFREE(MTYPE_BGP_EVPN, vpn); | |
3997 | return NULL; | |
3998 | } | |
6a8657d0 MK |
3999 | |
4000 | /* add to l2vni list on corresponding vrf */ | |
4001 | bgpevpn_link_to_l3vni(vpn); | |
4002 | ||
d62a17ae | 4003 | QOBJ_REG(vpn, bgpevpn); |
4004 | return vpn; | |
128ea8ab | 4005 | } |
4006 | ||
4007 | /* | |
4008 | * Free a given VPN - called in multiple scenarios such as zebra | |
4009 | * notification, configuration being deleted, advertise-all-vni disabled etc. | |
4010 | * This just frees appropriate memory, caller should have taken other | |
4011 | * needed actions. | |
4012 | */ | |
d62a17ae | 4013 | void bgp_evpn_free(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 4014 | { |
6a8657d0 | 4015 | bgpevpn_unlink_from_l3vni(vpn); |
d62a17ae | 4016 | bgp_table_unlock(vpn->route_table); |
4017 | bgp_evpn_unmap_vni_from_its_rts(bgp, vpn); | |
affe9e99 DS |
4018 | list_delete_and_null(&vpn->import_rtl); |
4019 | list_delete_and_null(&vpn->export_rtl); | |
e9eb5f63 | 4020 | bf_release_index(bm->rd_idspace, vpn->rd_id); |
d62a17ae | 4021 | hash_release(bgp->vnihash, vpn); |
4022 | QOBJ_UNREG(vpn); | |
4023 | XFREE(MTYPE_BGP_EVPN, vpn); | |
128ea8ab | 4024 | } |
4025 | ||
4026 | /* | |
4027 | * Import route into matching VNI(s). | |
4028 | */ | |
d62a17ae | 4029 | int bgp_evpn_import_route(struct bgp *bgp, afi_t afi, safi_t safi, |
4030 | struct prefix *p, struct bgp_info *ri) | |
128ea8ab | 4031 | { |
d62a17ae | 4032 | return install_uninstall_evpn_route(bgp, afi, safi, p, ri, 1); |
128ea8ab | 4033 | } |
4034 | ||
4035 | /* | |
4036 | * Unimport route from matching VNI(s). | |
4037 | */ | |
d62a17ae | 4038 | int bgp_evpn_unimport_route(struct bgp *bgp, afi_t afi, safi_t safi, |
4039 | struct prefix *p, struct bgp_info *ri) | |
128ea8ab | 4040 | { |
d62a17ae | 4041 | return install_uninstall_evpn_route(bgp, afi, safi, p, ri, 0); |
128ea8ab | 4042 | } |
4043 | ||
db0e1937 MK |
4044 | /* filter routes which have martian next hops */ |
4045 | int bgp_filter_evpn_routes_upon_martian_nh_change(struct bgp *bgp) | |
4046 | { | |
0291c246 MK |
4047 | afi_t afi; |
4048 | safi_t safi; | |
4049 | struct bgp_node *rd_rn, *rn; | |
4050 | struct bgp_table *table; | |
4051 | struct bgp_info *ri; | |
db0e1937 MK |
4052 | |
4053 | afi = AFI_L2VPN; | |
4054 | safi = SAFI_EVPN; | |
4055 | ||
4056 | /* Walk entire global routing table and evaluate routes which could be | |
4057 | * imported into this VPN. Note that we cannot just look at the routes | |
4058 | * for the VNI's RD - | |
4059 | * remote routes applicable for this VNI could have any RD. | |
4060 | */ | |
4061 | /* EVPN routes are a 2-level table. */ | |
4062 | for (rd_rn = bgp_table_top(bgp->rib[afi][safi]); rd_rn; | |
4063 | rd_rn = bgp_route_next(rd_rn)) { | |
4064 | table = (struct bgp_table *)(rd_rn->info); | |
4065 | if (!table) | |
4066 | continue; | |
4067 | ||
4068 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) { | |
4069 | ||
4070 | for (ri = rn->info; ri; ri = ri->next) { | |
4071 | ||
4072 | /* Consider "valid" remote routes applicable for | |
4073 | * this VNI. */ | |
4074 | if (!(ri->type == ZEBRA_ROUTE_BGP | |
4075 | && ri->sub_type == BGP_ROUTE_NORMAL)) | |
4076 | continue; | |
4077 | ||
60466a63 | 4078 | if (bgp_nexthop_self(bgp, ri->attr->nexthop)) { |
db0e1937 MK |
4079 | |
4080 | char attr_str[BUFSIZ]; | |
4081 | char pbuf[PREFIX_STRLEN]; | |
4082 | ||
4083 | bgp_dump_attr(ri->attr, attr_str, | |
4084 | BUFSIZ); | |
4085 | ||
4086 | if (bgp_debug_update(ri->peer, &rn->p, | |
4087 | NULL, 1)) | |
4088 | zlog_debug( | |
b682f6de | 4089 | "%u: prefix %s with attr %s - DENIED due to martian or self nexthop", |
db0e1937 MK |
4090 | bgp->vrf_id, |
4091 | prefix2str( | |
60466a63 | 4092 | &rn->p, pbuf, |
db0e1937 MK |
4093 | sizeof(pbuf)), |
4094 | attr_str); | |
4095 | ||
4096 | bgp_evpn_unimport_route(bgp, afi, safi, | |
4097 | &rn->p, ri); | |
4098 | ||
60466a63 QY |
4099 | bgp_rib_remove(rn, ri, ri->peer, afi, |
4100 | safi); | |
db0e1937 | 4101 | } |
db0e1937 MK |
4102 | } |
4103 | } | |
4104 | } | |
4105 | ||
4106 | return 0; | |
4107 | } | |
4108 | ||
128ea8ab | 4109 | /* |
4110 | * Handle del of a local MACIP. | |
4111 | */ | |
d62a17ae | 4112 | int bgp_evpn_local_macip_del(struct bgp *bgp, vni_t vni, struct ethaddr *mac, |
4113 | struct ipaddr *ip) | |
128ea8ab | 4114 | { |
d62a17ae | 4115 | struct bgpevpn *vpn; |
4116 | struct prefix_evpn p; | |
128ea8ab | 4117 | |
d62a17ae | 4118 | if (!bgp->vnihash) { |
4119 | zlog_err("%u: VNI hash not created", bgp->vrf_id); | |
4120 | return -1; | |
4121 | } | |
128ea8ab | 4122 | |
d62a17ae | 4123 | /* Lookup VNI hash - should exist. */ |
4124 | vpn = bgp_evpn_lookup_vni(bgp, vni); | |
4125 | if (!vpn || !is_vni_live(vpn)) { | |
4126 | zlog_warn("%u: VNI hash entry for VNI %u %s at MACIP DEL", | |
4127 | bgp->vrf_id, vni, vpn ? "not live" : "not found"); | |
4128 | return -1; | |
4129 | } | |
128ea8ab | 4130 | |
d62a17ae | 4131 | /* Remove EVPN type-2 route and schedule for processing. */ |
4132 | build_evpn_type2_prefix(&p, mac, ip); | |
4133 | delete_evpn_route(bgp, vpn, &p); | |
128ea8ab | 4134 | |
d62a17ae | 4135 | return 0; |
128ea8ab | 4136 | } |
4137 | ||
4138 | /* | |
4139 | * Handle add of a local MACIP. | |
4140 | */ | |
d62a17ae | 4141 | int bgp_evpn_local_macip_add(struct bgp *bgp, vni_t vni, struct ethaddr *mac, |
1a98c087 | 4142 | struct ipaddr *ip, u_char flags) |
128ea8ab | 4143 | { |
d62a17ae | 4144 | struct bgpevpn *vpn; |
4145 | struct prefix_evpn p; | |
128ea8ab | 4146 | |
d62a17ae | 4147 | if (!bgp->vnihash) { |
4148 | zlog_err("%u: VNI hash not created", bgp->vrf_id); | |
4149 | return -1; | |
4150 | } | |
128ea8ab | 4151 | |
d62a17ae | 4152 | /* Lookup VNI hash - should exist. */ |
4153 | vpn = bgp_evpn_lookup_vni(bgp, vni); | |
4154 | if (!vpn || !is_vni_live(vpn)) { | |
4155 | zlog_warn("%u: VNI hash entry for VNI %u %s at MACIP ADD", | |
4156 | bgp->vrf_id, vni, vpn ? "not live" : "not found"); | |
4157 | return -1; | |
4158 | } | |
128ea8ab | 4159 | |
d62a17ae | 4160 | /* Create EVPN type-2 route and schedule for processing. */ |
4161 | build_evpn_type2_prefix(&p, mac, ip); | |
1a98c087 | 4162 | if (update_evpn_route(bgp, vpn, &p, flags)) { |
d62a17ae | 4163 | char buf[ETHER_ADDR_STRLEN]; |
4164 | char buf2[INET6_ADDRSTRLEN]; | |
128ea8ab | 4165 | |
d62a17ae | 4166 | zlog_err( |
ead40654 | 4167 | "%u:Failed to create Type-2 route, VNI %u %s MAC %s IP %s (flags: 0x%x)", |
1a98c087 | 4168 | bgp->vrf_id, vpn->vni, |
b34fd35d | 4169 | CHECK_FLAG(flags, ZEBRA_MAC_TYPE_STICKY) ? "sticky gateway" |
1a98c087 | 4170 | : "", |
d62a17ae | 4171 | prefix_mac2str(mac, buf, sizeof(buf)), |
ead40654 MK |
4172 | ipaddr2str(ip, buf2, sizeof(buf2)), |
4173 | flags); | |
d62a17ae | 4174 | return -1; |
4175 | } | |
128ea8ab | 4176 | |
d62a17ae | 4177 | return 0; |
128ea8ab | 4178 | } |
4179 | ||
6a8657d0 MK |
4180 | static void link_l2vni_hash_to_l3vni(struct hash_backet *backet, |
4181 | struct bgp *bgp_vrf) | |
4182 | { | |
4183 | struct bgpevpn *vpn = NULL; | |
4184 | struct bgp *bgp_def = NULL; | |
4185 | ||
4186 | bgp_def = bgp_get_default(); | |
4187 | assert(bgp_def); | |
4188 | ||
4189 | vpn = (struct bgpevpn *)backet->data; | |
4190 | if (vpn->tenant_vrf_id == bgp_vrf->vrf_id) | |
4191 | bgpevpn_link_to_l3vni(vpn); | |
4192 | } | |
4193 | ||
fe1dc5a3 MK |
4194 | int bgp_evpn_local_l3vni_add(vni_t l3vni, |
4195 | vrf_id_t vrf_id, | |
b67a60d2 | 4196 | struct ethaddr *rmac, |
4197 | struct in_addr originator_ip) | |
fe1dc5a3 MK |
4198 | { |
4199 | struct bgp *bgp_vrf = NULL; /* bgp VRF instance */ | |
4200 | struct bgp *bgp_def = NULL; /* default bgp instance */ | |
f1f8b53c MK |
4201 | struct listnode *node = NULL; |
4202 | struct bgpevpn *vpn = NULL; | |
fe1dc5a3 MK |
4203 | as_t as = 0; |
4204 | ||
4205 | /* get the default instamce - required to get the AS number for VRF | |
523cafc4 | 4206 | * auto-creatio |
4207 | */ | |
fe1dc5a3 MK |
4208 | bgp_def = bgp_get_default(); |
4209 | if (!bgp_def) { | |
4210 | zlog_err("Cannot process L3VNI %u ADD - default BGP instance not yet created", | |
4211 | l3vni); | |
4212 | return -1; | |
4213 | } | |
4214 | as = bgp_def->as; | |
4215 | ||
4216 | /* if the BGP vrf instance doesnt exist - create one */ | |
0b5131c9 | 4217 | bgp_vrf = bgp_lookup_by_name(vrf_id_to_name(vrf_id)); |
fe1dc5a3 MK |
4218 | if (!bgp_vrf) { |
4219 | ||
4220 | int ret = 0; | |
4221 | ||
4222 | ret = bgp_get(&bgp_vrf, &as, vrf_id_to_name(vrf_id), | |
4223 | BGP_INSTANCE_TYPE_VRF); | |
4224 | switch (ret) { | |
4225 | case BGP_ERR_MULTIPLE_INSTANCE_NOT_SET: | |
4226 | zlog_err("'bgp multiple-instance' not present\n"); | |
4227 | return -1; | |
4228 | case BGP_ERR_AS_MISMATCH: | |
4229 | zlog_err("BGP is already running; AS is %u\n", as); | |
4230 | return -1; | |
4231 | case BGP_ERR_INSTANCE_MISMATCH: | |
4232 | zlog_err("BGP instance name and AS number mismatch\n"); | |
4233 | return -1; | |
4234 | } | |
4235 | ||
4236 | /* mark as auto created */ | |
4237 | SET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_AUTO); | |
4238 | } | |
4239 | ||
4240 | /* associate with l3vni */ | |
4241 | bgp_vrf->l3vni = l3vni; | |
4242 | ||
4243 | /* set the router mac - to be used in mac-ip routes for this vrf */ | |
4244 | memcpy(&bgp_vrf->rmac, rmac, sizeof(struct ethaddr)); | |
4245 | ||
b67a60d2 | 4246 | /* set the originator ip */ |
4247 | bgp_vrf->originator_ip = originator_ip; | |
4248 | ||
c581d8b0 MK |
4249 | /* auto derive RD/RT */ |
4250 | if (!CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_IMPORT_RT_CFGD)) | |
4251 | evpn_auto_rt_import_add_for_vrf(bgp_vrf); | |
4252 | if (!CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_EXPORT_RT_CFGD)) | |
4253 | evpn_auto_rt_export_add_for_vrf(bgp_vrf); | |
676f83b9 | 4254 | bgp_evpn_derive_auto_rd_for_vrf(bgp_vrf); |
fe1dc5a3 | 4255 | |
6a8657d0 MK |
4256 | /* link all corresponding l2vnis */ |
4257 | hash_iterate(bgp_def->vnihash, | |
4258 | (void (*)(struct hash_backet *, void *)) | |
4259 | link_l2vni_hash_to_l3vni, | |
4260 | bgp_vrf); | |
4261 | ||
f1f8b53c MK |
4262 | /* updates all corresponding local mac-ip routes */ |
4263 | for (ALL_LIST_ELEMENTS_RO(bgp_vrf->l2vnis, node, vpn)) | |
4264 | update_routes_for_vni(bgp_def, vpn); | |
fe1dc5a3 | 4265 | |
06d2e8f3 MK |
4266 | /* advertise type-5 routes if needed */ |
4267 | update_advertise_vrf_routes(bgp_vrf); | |
4268 | ||
5ba238b7 MK |
4269 | /* install all remote routes belonging to this l3vni into correspondng |
4270 | * vrf */ | |
4271 | install_routes_for_vrf(bgp_vrf); | |
fe1dc5a3 MK |
4272 | |
4273 | return 0; | |
4274 | } | |
4275 | ||
4276 | int bgp_evpn_local_l3vni_del(vni_t l3vni, | |
4277 | vrf_id_t vrf_id) | |
4278 | { | |
4279 | struct bgp *bgp_vrf = NULL; /* bgp vrf instance */ | |
f1f8b53c MK |
4280 | struct bgp *bgp_def = NULL; /* default bgp instance */ |
4281 | struct listnode *node = NULL; | |
4282 | struct bgpevpn *vpn = NULL; | |
fe1dc5a3 MK |
4283 | |
4284 | bgp_vrf = bgp_lookup_by_vrf_id(vrf_id); | |
4285 | if (!bgp_vrf) { | |
4286 | zlog_err("Cannot process L3VNI %u Del - Could not find BGP instance", | |
4287 | l3vni); | |
4288 | return -1; | |
4289 | } | |
4290 | ||
f1f8b53c MK |
4291 | bgp_def = bgp_get_default(); |
4292 | if (!bgp_def) { | |
4293 | zlog_err("Cannot process L3VNI %u Del - Could not find default BGP instance", | |
4294 | l3vni); | |
4295 | return -1; | |
4296 | } | |
4297 | ||
1eb88002 | 4298 | /* unimport remote routes from VRF, if it is AUTO vrf bgp_delete will |
523cafc4 | 4299 | * take care of uninstalling the routes from zebra |
4300 | */ | |
1eb88002 MK |
4301 | if (!CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_AUTO)) |
4302 | uninstall_routes_for_vrf(bgp_vrf); | |
5ba238b7 | 4303 | |
06d2e8f3 MK |
4304 | /* delete/withdraw all type-5 routes */ |
4305 | delete_withdraw_vrf_routes(bgp_vrf); | |
4306 | ||
fe1dc5a3 MK |
4307 | /* remove the l3vni from vrf instance */ |
4308 | bgp_vrf->l3vni = 0; | |
4309 | ||
4310 | /* remove the Rmac from the BGP vrf */ | |
4311 | memset(&bgp_vrf->rmac, 0, sizeof(struct ethaddr)); | |
4312 | ||
c581d8b0 | 4313 | /* delete RD/RT */ |
23a06e11 | 4314 | if (bgp_vrf->vrf_import_rtl && !list_isempty(bgp_vrf->vrf_import_rtl)) { |
10ebe1ab | 4315 | bgp_evpn_unmap_vrf_from_its_rts(bgp_vrf); |
5ba238b7 | 4316 | list_delete_all_node(bgp_vrf->vrf_import_rtl); |
23a06e11 MK |
4317 | } |
4318 | if (bgp_vrf->vrf_export_rtl && !list_isempty(bgp_vrf->vrf_export_rtl)) { | |
5ba238b7 | 4319 | list_delete_all_node(bgp_vrf->vrf_export_rtl); |
23a06e11 | 4320 | } |
fe1dc5a3 | 4321 | |
f1f8b53c MK |
4322 | /* update all corresponding local mac-ip routes */ |
4323 | for (ALL_LIST_ELEMENTS_RO(bgp_vrf->l2vnis, node, vpn)) | |
4324 | update_routes_for_vni(bgp_def, vpn); | |
fe1dc5a3 | 4325 | |
fe1dc5a3 MK |
4326 | |
4327 | /* Delete the instance if it was autocreated */ | |
4328 | if (CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_AUTO)) | |
4329 | bgp_delete(bgp_vrf); | |
4330 | ||
4331 | return 0; | |
4332 | } | |
4333 | ||
128ea8ab | 4334 | /* |
4335 | * Handle del of a local VNI. | |
4336 | */ | |
d62a17ae | 4337 | int bgp_evpn_local_vni_del(struct bgp *bgp, vni_t vni) |
128ea8ab | 4338 | { |
d62a17ae | 4339 | struct bgpevpn *vpn; |
128ea8ab | 4340 | |
d62a17ae | 4341 | if (!bgp->vnihash) { |
4342 | zlog_err("%u: VNI hash not created", bgp->vrf_id); | |
4343 | return -1; | |
4344 | } | |
128ea8ab | 4345 | |
d62a17ae | 4346 | /* Locate VNI hash */ |
4347 | vpn = bgp_evpn_lookup_vni(bgp, vni); | |
4348 | if (!vpn) { | |
4349 | zlog_warn("%u: VNI hash entry for VNI %u not found at DEL", | |
4350 | bgp->vrf_id, vni); | |
4351 | return 0; | |
4352 | } | |
128ea8ab | 4353 | |
d62a17ae | 4354 | /* Remove all local EVPN routes and schedule for processing (to |
4355 | * withdraw from peers). | |
4356 | */ | |
4357 | delete_routes_for_vni(bgp, vpn); | |
128ea8ab | 4358 | |
db0e1937 MK |
4359 | /* |
4360 | * tunnel is no longer active, del tunnel ip address from tip_hash | |
4361 | */ | |
4362 | bgp_tip_del(bgp, &vpn->originator_ip); | |
4363 | ||
d62a17ae | 4364 | /* Clear "live" flag and see if hash needs to be freed. */ |
4365 | UNSET_FLAG(vpn->flags, VNI_FLAG_LIVE); | |
4366 | if (!is_vni_configured(vpn)) | |
4367 | bgp_evpn_free(bgp, vpn); | |
128ea8ab | 4368 | |
d62a17ae | 4369 | return 0; |
128ea8ab | 4370 | } |
4371 | ||
4372 | /* | |
4373 | * Handle add (or update) of a local VNI. The only VNI change we care | |
4374 | * about is change to local-tunnel-ip. | |
4375 | */ | |
d62a17ae | 4376 | int bgp_evpn_local_vni_add(struct bgp *bgp, vni_t vni, |
29c53922 MK |
4377 | struct in_addr originator_ip, |
4378 | vrf_id_t tenant_vrf_id) | |
d62a17ae | 4379 | { |
4380 | struct bgpevpn *vpn; | |
4381 | struct prefix_evpn p; | |
4382 | ||
4383 | if (!bgp->vnihash) { | |
4384 | zlog_err("%u: VNI hash not created", bgp->vrf_id); | |
4385 | return -1; | |
4386 | } | |
4387 | ||
4388 | /* Lookup VNI. If present and no change, exit. */ | |
4389 | vpn = bgp_evpn_lookup_vni(bgp, vni); | |
ddd16ed5 | 4390 | if (vpn) { |
29c53922 MK |
4391 | |
4392 | /* update tenant_vrf_id if required */ | |
6a8657d0 MK |
4393 | if (vpn->tenant_vrf_id != tenant_vrf_id) { |
4394 | bgpevpn_unlink_from_l3vni(vpn); | |
29c53922 | 4395 | vpn->tenant_vrf_id = tenant_vrf_id; |
6a8657d0 | 4396 | bgpevpn_link_to_l3vni(vpn); |
e92bd2a2 MK |
4397 | |
4398 | /* update all routes with new export RT for VRFs */ | |
4399 | update_routes_for_vni(bgp, vpn); | |
6a8657d0 | 4400 | } |
29c53922 | 4401 | |
2f1ac16a MK |
4402 | if (is_vni_live(vpn) |
4403 | && IPV4_ADDR_SAME(&vpn->originator_ip, &originator_ip)) | |
d62a17ae | 4404 | /* Probably some other param has changed that we don't |
4405 | * care about. */ | |
4406 | return 0; | |
4407 | ||
4408 | /* Local tunnel endpoint IP address has changed */ | |
ddd16ed5 | 4409 | handle_tunnel_ip_change(bgp, vpn, originator_ip); |
d62a17ae | 4410 | } |
4411 | ||
4412 | /* Create or update as appropriate. */ | |
4413 | if (!vpn) { | |
29c53922 | 4414 | vpn = bgp_evpn_new(bgp, vni, originator_ip, tenant_vrf_id); |
d62a17ae | 4415 | if (!vpn) { |
4416 | zlog_err( | |
4417 | "%u: Failed to allocate VNI entry for VNI %u - at Add", | |
4418 | bgp->vrf_id, vni); | |
4419 | return -1; | |
4420 | } | |
4421 | } | |
4422 | ||
db0e1937 | 4423 | /* if the VNI is live already, there is nothing more to do */ |
ddd16ed5 MK |
4424 | if (is_vni_live(vpn)) |
4425 | return 0; | |
4426 | ||
d62a17ae | 4427 | /* Mark as "live" */ |
4428 | SET_FLAG(vpn->flags, VNI_FLAG_LIVE); | |
4429 | ||
db0e1937 MK |
4430 | /* tunnel is now active, add tunnel-ip to db */ |
4431 | bgp_tip_add(bgp, &originator_ip); | |
4432 | ||
4433 | /* filter routes as nexthop database has changed */ | |
4434 | bgp_filter_evpn_routes_upon_martian_nh_change(bgp); | |
4435 | ||
d62a17ae | 4436 | /* Create EVPN type-3 route and schedule for processing. */ |
4437 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
4438 | if (update_evpn_route(bgp, vpn, &p, 0)) { | |
4439 | zlog_err("%u: Type3 route creation failure for VNI %u", | |
4440 | bgp->vrf_id, vni); | |
4441 | return -1; | |
4442 | } | |
4443 | ||
4444 | /* If we have learnt and retained remote routes (VTEPs, MACs) for this | |
4445 | * VNI, | |
4446 | * install them. | |
4447 | */ | |
4448 | install_routes_for_vni(bgp, vpn); | |
4449 | ||
d7d97010 MK |
4450 | /* If we are advertising gateway mac-ip |
4451 | It needs to be conveyed again to zebra */ | |
4452 | bgp_zebra_advertise_gw_macip(bgp, vpn->advertise_gw_macip, vpn->vni); | |
4453 | ||
d62a17ae | 4454 | return 0; |
b18825eb | 4455 | } |
14c1a7bf | 4456 | |
7724c0a1 | 4457 | /* |
4458 | * Cleanup EVPN information on disable - Need to delete and withdraw | |
4459 | * EVPN routes from peers. | |
4460 | */ | |
d62a17ae | 4461 | void bgp_evpn_cleanup_on_disable(struct bgp *bgp) |
7724c0a1 | 4462 | { |
9d303b37 DL |
4463 | hash_iterate(bgp->vnihash, (void (*)(struct hash_backet *, |
4464 | void *))cleanup_vni_on_disable, | |
4465 | bgp); | |
7724c0a1 | 4466 | } |
4467 | ||
14c1a7bf | 4468 | /* |
4469 | * Cleanup EVPN information - invoked at the time of bgpd exit or when the | |
4470 | * BGP instance (default) is being freed. | |
4471 | */ | |
d62a17ae | 4472 | void bgp_evpn_cleanup(struct bgp *bgp) |
14c1a7bf | 4473 | { |
d62a17ae | 4474 | if (bgp->vnihash) |
9d303b37 DL |
4475 | hash_iterate(bgp->vnihash, (void (*)(struct hash_backet *, |
4476 | void *))free_vni_entry, | |
4477 | bgp); | |
d62a17ae | 4478 | if (bgp->import_rt_hash) |
4479 | hash_free(bgp->import_rt_hash); | |
4480 | bgp->import_rt_hash = NULL; | |
10ebe1ab MK |
4481 | if (bgp->vrf_import_rt_hash) |
4482 | hash_free(bgp->vrf_import_rt_hash); | |
4483 | bgp->vrf_import_rt_hash = NULL; | |
d62a17ae | 4484 | if (bgp->vnihash) |
4485 | hash_free(bgp->vnihash); | |
4486 | bgp->vnihash = NULL; | |
c581d8b0 | 4487 | if (bgp->vrf_import_rtl) |
bb7a24ab | 4488 | list_delete_and_null(&bgp->vrf_import_rtl); |
c581d8b0 | 4489 | if (bgp->vrf_export_rtl) |
bb7a24ab | 4490 | list_delete_and_null(&bgp->vrf_export_rtl); |
6a8657d0 | 4491 | if (bgp->l2vnis) |
bb7a24ab | 4492 | list_delete_and_null(&bgp->l2vnis); |
676f83b9 | 4493 | bf_release_index(bm->rd_idspace, bgp->vrf_rd_id); |
14c1a7bf | 4494 | } |
4495 | ||
4496 | /* | |
4497 | * Initialization for EVPN | |
4498 | * Create | |
4499 | * VNI hash table | |
4500 | * hash for RT to VNI | |
676f83b9 | 4501 | * assign a unique rd id for auto derivation of vrf_prd |
14c1a7bf | 4502 | */ |
d62a17ae | 4503 | void bgp_evpn_init(struct bgp *bgp) |
4504 | { | |
4505 | bgp->vnihash = | |
4506 | hash_create(vni_hash_key_make, vni_hash_cmp, "BGP VNI Hash"); | |
4507 | bgp->import_rt_hash = | |
4508 | hash_create(import_rt_hash_key_make, import_rt_hash_cmp, | |
4509 | "BGP Import RT Hash"); | |
10ebe1ab MK |
4510 | bgp->vrf_import_rt_hash = |
4511 | hash_create(vrf_import_rt_hash_key_make, vrf_import_rt_hash_cmp, | |
4512 | "BGP VRF Import RT Hash"); | |
c581d8b0 MK |
4513 | bgp->vrf_import_rtl = list_new(); |
4514 | bgp->vrf_import_rtl->cmp = | |
4515 | (int (*)(void *, void *))evpn_route_target_cmp; | |
4516 | ||
4517 | bgp->vrf_export_rtl = list_new(); | |
4518 | bgp->vrf_export_rtl->cmp = | |
4519 | (int (*)(void *, void *))evpn_route_target_cmp; | |
6a8657d0 MK |
4520 | bgp->l2vnis = list_new(); |
4521 | bgp->l2vnis->cmp = | |
4522 | (int (*)(void *, void *))vni_hash_cmp; | |
676f83b9 | 4523 | bf_assign_index(bm->rd_idspace, bgp->vrf_rd_id); |
4524 | ||
14c1a7bf | 4525 | } |
10ebe1ab MK |
4526 | |
4527 | void bgp_evpn_vrf_delete(struct bgp *bgp_vrf) | |
4528 | { | |
4529 | bgp_evpn_unmap_vrf_from_its_rts(bgp_vrf); | |
4530 | } |