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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, | |
509 | u_char sticky) | |
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 | ||
544 | /* TX MAC sticky status */ | |
545 | if (add) | |
546 | stream_putc(s, sticky); | |
547 | ||
548 | stream_putw_at(s, 0, stream_get_endp(s)); | |
549 | ||
550 | if (bgp_debug_zebra(NULL)) | |
551 | zlog_debug("Tx %s MACIP, VNI %u %sMAC %s IP %s remote VTEP %s", | |
552 | add ? "ADD" : "DEL", vpn->vni, | |
553 | sticky ? "sticky " : "", | |
554 | prefix_mac2str(&p->prefix.mac, buf1, sizeof(buf1)), | |
555 | ipaddr2str(&p->prefix.ip, buf3, sizeof(buf3)), | |
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 | ||
604 | /* | |
605 | * Build extended communities for EVPN route. RT and ENCAP are | |
606 | * applicable to all routes. | |
7ec156a9 MK |
607 | * TODO: currently kernel doesnt support ipv6 routes with ipv4 nexthops. |
608 | * This means that we can't do symmetric routing for ipv6 hosts routes | |
609 | * in the same way as ipv4 host routes. | |
610 | * We wont attach l3-vni related RTs for ipv6 routes. | |
611 | * For now, We will only adevrtise ipv4 host routes | |
612 | * with L3-VNI related ext-comm. | |
128ea8ab | 613 | */ |
7ec156a9 MK |
614 | static void build_evpn_route_extcomm(struct bgpevpn *vpn, struct attr *attr, |
615 | afi_t afi) | |
128ea8ab | 616 | { |
d62a17ae | 617 | struct ecommunity ecom_encap; |
618 | struct ecommunity ecom_sticky; | |
bc59a672 | 619 | struct ecommunity ecom_rmac; |
d62a17ae | 620 | struct ecommunity_val eval; |
621 | struct ecommunity_val eval_sticky; | |
bc59a672 | 622 | struct ecommunity_val eval_rmac; |
d62a17ae | 623 | bgp_encap_types tnl_type; |
624 | struct listnode *node, *nnode; | |
625 | struct ecommunity *ecom; | |
626 | u_int32_t seqnum; | |
7a3e76f1 | 627 | struct list *vrf_export_rtl = NULL; |
128ea8ab | 628 | |
d62a17ae | 629 | /* Encap */ |
630 | tnl_type = BGP_ENCAP_TYPE_VXLAN; | |
631 | memset(&ecom_encap, 0, sizeof(ecom_encap)); | |
632 | encode_encap_extcomm(tnl_type, &eval); | |
633 | ecom_encap.size = 1; | |
634 | ecom_encap.val = (u_int8_t *)eval.val; | |
128ea8ab | 635 | |
d62a17ae | 636 | /* Add Encap */ |
637 | attr->ecommunity = ecommunity_dup(&ecom_encap); | |
128ea8ab | 638 | |
7a3e76f1 | 639 | /* Add the export RTs for L2VNI */ |
d62a17ae | 640 | for (ALL_LIST_ELEMENTS(vpn->export_rtl, node, nnode, ecom)) |
641 | attr->ecommunity = ecommunity_merge(attr->ecommunity, ecom); | |
128ea8ab | 642 | |
7ec156a9 MK |
643 | /* Add the export RTs for L3VNI - currently only supported for IPV4 host |
644 | * routes */ | |
645 | if (afi == AFI_IP) { | |
646 | vrf_export_rtl = bgpevpn_get_vrf_export_rtl(vpn); | |
647 | if (vrf_export_rtl && !list_isempty(vrf_export_rtl)) { | |
648 | for (ALL_LIST_ELEMENTS(vrf_export_rtl, node, nnode, | |
649 | ecom)) | |
650 | attr->ecommunity = | |
651 | ecommunity_merge(attr->ecommunity, | |
652 | ecom); | |
653 | } | |
f1f8b53c | 654 | } |
7a3e76f1 | 655 | |
d62a17ae | 656 | if (attr->sticky) { |
657 | seqnum = 0; | |
658 | memset(&ecom_sticky, 0, sizeof(ecom_sticky)); | |
659 | encode_mac_mobility_extcomm(1, seqnum, &eval_sticky); | |
660 | ecom_sticky.size = 1; | |
661 | ecom_sticky.val = (u_int8_t *)eval_sticky.val; | |
662 | attr->ecommunity = | |
663 | ecommunity_merge(attr->ecommunity, &ecom_sticky); | |
664 | } | |
c85c03c7 | 665 | |
7ec156a9 | 666 | if (afi == AFI_IP && !is_zero_mac(&attr->rmac)) { |
bc59a672 MK |
667 | memset(&ecom_rmac, 0, sizeof(ecom_rmac)); |
668 | encode_rmac_extcomm(&eval_rmac, &attr->rmac); | |
669 | ecom_rmac.size = 1; | |
670 | ecom_rmac.val = (uint8_t *)eval_rmac.val; | |
671 | attr->ecommunity = ecommunity_merge(attr->ecommunity, | |
672 | &ecom_rmac); | |
673 | } | |
674 | ||
d62a17ae | 675 | attr->flag |= ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES); |
128ea8ab | 676 | } |
677 | ||
678 | /* | |
679 | * Add MAC mobility extended community to attribute. | |
680 | */ | |
d62a17ae | 681 | static void add_mac_mobility_to_attr(u_int32_t seq_num, struct attr *attr) |
682 | { | |
683 | struct ecommunity ecom_tmp; | |
684 | struct ecommunity_val eval; | |
421bb26a | 685 | u_int8_t *ecom_val_ptr; |
d62a17ae | 686 | int i; |
687 | u_int8_t *pnt; | |
688 | int type = 0; | |
689 | int sub_type = 0; | |
690 | ||
691 | /* Build MM */ | |
692 | encode_mac_mobility_extcomm(0, seq_num, &eval); | |
693 | ||
694 | /* Find current MM ecommunity */ | |
421bb26a | 695 | ecom_val_ptr = NULL; |
d62a17ae | 696 | |
697 | if (attr->ecommunity) { | |
698 | for (i = 0; i < attr->ecommunity->size; i++) { | |
699 | pnt = attr->ecommunity->val + (i * 8); | |
700 | type = *pnt++; | |
701 | sub_type = *pnt++; | |
702 | ||
703 | if (type == ECOMMUNITY_ENCODE_EVPN | |
704 | && sub_type | |
705 | == ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY) { | |
421bb26a MK |
706 | ecom_val_ptr = |
707 | (u_int8_t *)(attr->ecommunity->val | |
708 | + (i * 8)); | |
d62a17ae | 709 | break; |
710 | } | |
711 | } | |
712 | } | |
713 | ||
714 | /* Update the existing MM ecommunity */ | |
421bb26a MK |
715 | if (ecom_val_ptr) { |
716 | memcpy(ecom_val_ptr, eval.val, sizeof(char) * ECOMMUNITY_SIZE); | |
d62a17ae | 717 | } |
718 | /* Add MM to existing */ | |
719 | else { | |
720 | memset(&ecom_tmp, 0, sizeof(ecom_tmp)); | |
721 | ecom_tmp.size = 1; | |
722 | ecom_tmp.val = (u_int8_t *)eval.val; | |
723 | ||
724 | attr->ecommunity = | |
725 | ecommunity_merge(attr->ecommunity, &ecom_tmp); | |
726 | } | |
128ea8ab | 727 | } |
728 | ||
729 | /* Install EVPN route into zebra. */ | |
d62a17ae | 730 | static int evpn_zebra_install(struct bgp *bgp, struct bgpevpn *vpn, |
731 | struct prefix_evpn *p, | |
732 | struct in_addr remote_vtep_ip, u_char sticky) | |
128ea8ab | 733 | { |
d62a17ae | 734 | int ret; |
128ea8ab | 735 | |
d62a17ae | 736 | if (p->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) |
737 | ret = bgp_zebra_send_remote_macip(bgp, vpn, p, remote_vtep_ip, | |
738 | 1, sticky); | |
739 | else | |
740 | ret = bgp_zebra_send_remote_vtep(bgp, vpn, p, 1); | |
128ea8ab | 741 | |
d62a17ae | 742 | return ret; |
128ea8ab | 743 | } |
744 | ||
745 | /* Uninstall EVPN route from zebra. */ | |
d62a17ae | 746 | static int evpn_zebra_uninstall(struct bgp *bgp, struct bgpevpn *vpn, |
747 | struct prefix_evpn *p, | |
748 | struct in_addr remote_vtep_ip) | |
128ea8ab | 749 | { |
d62a17ae | 750 | int ret; |
128ea8ab | 751 | |
d62a17ae | 752 | if (p->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) |
753 | ret = bgp_zebra_send_remote_macip(bgp, vpn, p, remote_vtep_ip, | |
754 | 0, 0); | |
755 | else | |
756 | ret = bgp_zebra_send_remote_vtep(bgp, vpn, p, 0); | |
128ea8ab | 757 | |
d62a17ae | 758 | return ret; |
128ea8ab | 759 | } |
760 | ||
761 | /* | |
762 | * Due to MAC mobility, the prior "local" best route has been supplanted | |
763 | * by a "remote" best route. The prior route has to be deleted and withdrawn | |
764 | * from peers. | |
765 | */ | |
d62a17ae | 766 | static void evpn_delete_old_local_route(struct bgp *bgp, struct bgpevpn *vpn, |
767 | struct bgp_node *rn, | |
768 | struct bgp_info *old_local) | |
128ea8ab | 769 | { |
d62a17ae | 770 | struct bgp_node *global_rn; |
771 | struct bgp_info *ri; | |
772 | afi_t afi = AFI_L2VPN; | |
773 | safi_t safi = SAFI_EVPN; | |
128ea8ab | 774 | |
d62a17ae | 775 | /* Locate route node in the global EVPN routing table. Note that |
776 | * this table is a 2-level tree (RD-level + Prefix-level) similar to | |
777 | * L3VPN routes. | |
778 | */ | |
779 | global_rn = bgp_afi_node_lookup(bgp->rib[afi][safi], afi, safi, | |
780 | (struct prefix *)&rn->p, &vpn->prd); | |
781 | if (global_rn) { | |
782 | /* Delete route entry in the global EVPN table. */ | |
783 | delete_evpn_route_entry(bgp, vpn, afi, safi, global_rn, &ri); | |
128ea8ab | 784 | |
d62a17ae | 785 | /* Schedule for processing - withdraws to peers happen from |
786 | * this table. | |
787 | */ | |
788 | if (ri) | |
789 | bgp_process(bgp, global_rn, afi, safi); | |
790 | bgp_unlock_node(global_rn); | |
791 | } | |
128ea8ab | 792 | |
d62a17ae | 793 | /* Delete route entry in the VNI route table, caller to remove. */ |
794 | bgp_info_delete(rn, old_local); | |
128ea8ab | 795 | } |
796 | ||
797 | /* | |
798 | * Calculate the best path for an EVPN route. Install/update best path in zebra, | |
799 | * if appropriate. | |
800 | */ | |
d62a17ae | 801 | static int evpn_route_select_install(struct bgp *bgp, struct bgpevpn *vpn, |
802 | struct bgp_node *rn) | |
803 | { | |
804 | struct bgp_info *old_select, *new_select; | |
805 | struct bgp_info_pair old_and_new; | |
806 | afi_t afi = AFI_L2VPN; | |
807 | safi_t safi = SAFI_EVPN; | |
808 | int ret = 0; | |
809 | ||
810 | /* Compute the best path. */ | |
811 | bgp_best_selection(bgp, rn, &bgp->maxpaths[afi][safi], &old_and_new, | |
812 | afi, safi); | |
813 | old_select = old_and_new.old; | |
814 | new_select = old_and_new.new; | |
815 | ||
816 | /* If the best path hasn't changed - see if there is still something to | |
817 | * update | |
818 | * to zebra RIB. | |
819 | */ | |
820 | if (old_select && old_select == new_select | |
821 | && old_select->type == ZEBRA_ROUTE_BGP | |
822 | && old_select->sub_type == BGP_ROUTE_NORMAL | |
823 | && !CHECK_FLAG(rn->flags, BGP_NODE_USER_CLEAR) | |
824 | && !CHECK_FLAG(old_select->flags, BGP_INFO_ATTR_CHANGED) | |
825 | && !bgp->addpath_tx_used[afi][safi]) { | |
826 | if (bgp_zebra_has_route_changed(rn, old_select)) | |
827 | ret = evpn_zebra_install(bgp, vpn, | |
828 | (struct prefix_evpn *)&rn->p, | |
829 | old_select->attr->nexthop, | |
830 | old_select->attr->sticky); | |
831 | UNSET_FLAG(old_select->flags, BGP_INFO_MULTIPATH_CHG); | |
832 | bgp_zebra_clear_route_change_flags(rn); | |
833 | return ret; | |
834 | } | |
835 | ||
836 | /* If the user did a "clear" this flag will be set */ | |
837 | UNSET_FLAG(rn->flags, BGP_NODE_USER_CLEAR); | |
838 | ||
839 | /* bestpath has changed; update relevant fields and install or uninstall | |
840 | * into the zebra RIB. | |
841 | */ | |
842 | if (old_select || new_select) | |
843 | bgp_bump_version(rn); | |
844 | ||
845 | if (old_select) | |
846 | bgp_info_unset_flag(rn, old_select, BGP_INFO_SELECTED); | |
847 | if (new_select) { | |
848 | bgp_info_set_flag(rn, new_select, BGP_INFO_SELECTED); | |
849 | bgp_info_unset_flag(rn, new_select, BGP_INFO_ATTR_CHANGED); | |
850 | UNSET_FLAG(new_select->flags, BGP_INFO_MULTIPATH_CHG); | |
851 | } | |
852 | ||
853 | if (new_select && new_select->type == ZEBRA_ROUTE_BGP | |
854 | && new_select->sub_type == BGP_ROUTE_NORMAL) { | |
855 | ret = evpn_zebra_install(bgp, vpn, (struct prefix_evpn *)&rn->p, | |
856 | new_select->attr->nexthop, | |
857 | new_select->attr->sticky); | |
858 | /* If an old best existed and it was a "local" route, the only | |
859 | * reason | |
860 | * it would be supplanted is due to MAC mobility procedures. So, | |
861 | * we | |
862 | * need to do an implicit delete and withdraw that route from | |
863 | * peers. | |
864 | */ | |
865 | if (old_select && old_select->peer == bgp->peer_self | |
866 | && old_select->type == ZEBRA_ROUTE_BGP | |
867 | && old_select->sub_type == BGP_ROUTE_STATIC) | |
868 | evpn_delete_old_local_route(bgp, vpn, rn, old_select); | |
869 | } else { | |
870 | if (old_select && old_select->type == ZEBRA_ROUTE_BGP | |
871 | && old_select->sub_type == BGP_ROUTE_NORMAL) | |
872 | ret = evpn_zebra_uninstall(bgp, vpn, | |
873 | (struct prefix_evpn *)&rn->p, | |
874 | old_select->attr->nexthop); | |
875 | } | |
876 | ||
877 | /* Clear any route change flags. */ | |
878 | bgp_zebra_clear_route_change_flags(rn); | |
879 | ||
880 | /* Reap old select bgp_info, if it has been removed */ | |
881 | if (old_select && CHECK_FLAG(old_select->flags, BGP_INFO_REMOVED)) | |
882 | bgp_info_reap(rn, old_select); | |
883 | ||
884 | return ret; | |
128ea8ab | 885 | } |
886 | ||
c85c03c7 | 887 | |
888 | /* | |
889 | * Return true if the local ri for this rn has sticky set | |
890 | */ | |
d62a17ae | 891 | static int evpn_route_is_sticky(struct bgp *bgp, struct bgp_node *rn) |
c85c03c7 | 892 | { |
d62a17ae | 893 | struct bgp_info *tmp_ri; |
894 | struct bgp_info *local_ri; | |
c85c03c7 | 895 | |
d62a17ae | 896 | local_ri = NULL; |
897 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) { | |
898 | if (tmp_ri->peer == bgp->peer_self | |
899 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
900 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
901 | local_ri = tmp_ri; | |
902 | } | |
c85c03c7 | 903 | |
d62a17ae | 904 | if (!local_ri) |
905 | return 0; | |
c85c03c7 | 906 | |
d62a17ae | 907 | return local_ri->attr->sticky; |
c85c03c7 | 908 | } |
909 | ||
128ea8ab | 910 | /* |
911 | * Create or update EVPN route entry. This could be in the VNI route table | |
912 | * or the global route table. | |
913 | */ | |
d62a17ae | 914 | static int update_evpn_route_entry(struct bgp *bgp, struct bgpevpn *vpn, |
915 | afi_t afi, safi_t safi, struct bgp_node *rn, | |
916 | struct attr *attr, int add, int vni_table, | |
1a98c087 | 917 | struct bgp_info **ri, u_char flags) |
d62a17ae | 918 | { |
919 | struct bgp_info *tmp_ri; | |
920 | struct bgp_info *local_ri, *remote_ri; | |
921 | struct attr *attr_new; | |
922 | mpls_label_t label = MPLS_INVALID_LABEL; | |
923 | int route_change = 1; | |
924 | u_char sticky = 0; | |
925 | ||
926 | *ri = NULL; | |
927 | ||
928 | /* See if this is an update of an existing route, or a new add. Also, | |
929 | * identify if already known from remote, and if so, the one with the | |
930 | * highest sequence number; this is only when adding to the VNI routing | |
931 | * table. | |
932 | */ | |
933 | local_ri = remote_ri = NULL; | |
934 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) { | |
935 | if (tmp_ri->peer == bgp->peer_self | |
936 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
937 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
938 | local_ri = tmp_ri; | |
939 | if (vni_table) { | |
940 | if (tmp_ri->type == ZEBRA_ROUTE_BGP | |
941 | && tmp_ri->sub_type == BGP_ROUTE_NORMAL | |
942 | && CHECK_FLAG(tmp_ri->flags, BGP_INFO_VALID)) { | |
943 | if (!remote_ri) | |
944 | remote_ri = tmp_ri; | |
945 | else if (mac_mobility_seqnum(tmp_ri->attr) | |
946 | > mac_mobility_seqnum(remote_ri->attr)) | |
947 | remote_ri = tmp_ri; | |
948 | } | |
949 | } | |
950 | } | |
951 | ||
952 | /* If route doesn't exist already, create a new one, if told to. | |
953 | * Otherwise act based on whether the attributes of the route have | |
954 | * changed or not. | |
955 | */ | |
956 | if (!local_ri && !add) | |
957 | return 0; | |
958 | ||
959 | if (!local_ri) { | |
960 | /* When learnt locally for the first time but already known from | |
961 | * remote, we have to initiate appropriate MAC mobility steps. | |
962 | * This | |
963 | * is applicable when updating the VNI routing table. | |
1a98c087 MK |
964 | * We need to skip mobility steps for g/w macs (local mac on g/w |
965 | * SVI) advertised in EVPN. | |
966 | * This will ensure that local routes are preferred for g/w macs | |
d62a17ae | 967 | */ |
1a98c087 | 968 | if (remote_ri && !CHECK_FLAG(flags, ZEBRA_MAC_TYPE_GW)) { |
d62a17ae | 969 | u_int32_t cur_seqnum; |
970 | ||
971 | /* Add MM extended community to route. */ | |
972 | cur_seqnum = mac_mobility_seqnum(remote_ri->attr); | |
973 | add_mac_mobility_to_attr(cur_seqnum + 1, attr); | |
974 | } | |
975 | ||
976 | /* Add (or update) attribute to hash. */ | |
977 | attr_new = bgp_attr_intern(attr); | |
978 | ||
979 | /* Extract MAC mobility sequence number, if any. */ | |
980 | attr_new->mm_seqnum = | |
981 | bgp_attr_mac_mobility_seqnum(attr_new, &sticky); | |
982 | attr_new->sticky = sticky; | |
983 | ||
984 | /* Create new route with its attribute. */ | |
985 | tmp_ri = info_make(ZEBRA_ROUTE_BGP, BGP_ROUTE_STATIC, 0, | |
986 | bgp->peer_self, attr_new, rn); | |
987 | SET_FLAG(tmp_ri->flags, BGP_INFO_VALID); | |
988 | bgp_info_extra_get(tmp_ri); | |
989 | ||
990 | /* The VNI goes into the 'label' field of the route */ | |
991 | vni2label(vpn->vni, &label); | |
992 | ||
993 | memcpy(&tmp_ri->extra->label, &label, BGP_LABEL_BYTES); | |
994 | bgp_info_add(rn, tmp_ri); | |
995 | } else { | |
996 | tmp_ri = local_ri; | |
997 | if (attrhash_cmp(tmp_ri->attr, attr) | |
998 | && !CHECK_FLAG(tmp_ri->flags, BGP_INFO_REMOVED)) | |
999 | route_change = 0; | |
1000 | else { | |
1001 | /* The attribute has changed. */ | |
1002 | /* Add (or update) attribute to hash. */ | |
1003 | attr_new = bgp_attr_intern(attr); | |
1004 | bgp_info_set_flag(rn, tmp_ri, BGP_INFO_ATTR_CHANGED); | |
1005 | ||
1006 | /* Restore route, if needed. */ | |
1007 | if (CHECK_FLAG(tmp_ri->flags, BGP_INFO_REMOVED)) | |
1008 | bgp_info_restore(rn, tmp_ri); | |
1009 | ||
1010 | /* Unintern existing, set to new. */ | |
1011 | bgp_attr_unintern(&tmp_ri->attr); | |
1012 | tmp_ri->attr = attr_new; | |
1013 | tmp_ri->uptime = bgp_clock(); | |
1014 | } | |
1015 | } | |
1016 | ||
1017 | /* Return back the route entry. */ | |
1018 | *ri = tmp_ri; | |
1019 | return route_change; | |
128ea8ab | 1020 | } |
1021 | ||
1022 | /* | |
1023 | * Create or update EVPN route (of type based on prefix) for specified VNI | |
1024 | * and schedule for processing. | |
1025 | */ | |
d62a17ae | 1026 | static int update_evpn_route(struct bgp *bgp, struct bgpevpn *vpn, |
1a98c087 | 1027 | struct prefix_evpn *p, u_char flags) |
128ea8ab | 1028 | { |
d62a17ae | 1029 | struct bgp_node *rn; |
1030 | struct attr attr; | |
1031 | struct attr *attr_new; | |
1032 | struct bgp_info *ri; | |
1033 | afi_t afi = AFI_L2VPN; | |
1034 | safi_t safi = SAFI_EVPN; | |
1035 | int route_change; | |
128ea8ab | 1036 | |
d62a17ae | 1037 | memset(&attr, 0, sizeof(struct attr)); |
128ea8ab | 1038 | |
d62a17ae | 1039 | /* Build path-attribute for this route. */ |
1040 | bgp_attr_default_set(&attr, BGP_ORIGIN_IGP); | |
1041 | attr.nexthop = vpn->originator_ip; | |
1042 | attr.mp_nexthop_global_in = vpn->originator_ip; | |
1043 | attr.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
1a98c087 | 1044 | attr.sticky = CHECK_FLAG(flags, ZEBRA_MAC_TYPE_STICKY) ? 1 : 0; |
bc59a672 | 1045 | bgpevpn_get_rmac(vpn, &attr.rmac); |
128ea8ab | 1046 | |
d62a17ae | 1047 | /* Set up RT and ENCAP extended community. */ |
7ec156a9 MK |
1048 | build_evpn_route_extcomm(vpn, &attr, |
1049 | IS_EVPN_PREFIX_IPADDR_V4(p) ? | |
1050 | AFI_IP : AFI_IP6); | |
128ea8ab | 1051 | |
d62a17ae | 1052 | /* First, create (or fetch) route node within the VNI. */ |
1053 | /* NOTE: There is no RD here. */ | |
1054 | rn = bgp_node_get(vpn->route_table, (struct prefix *)p); | |
128ea8ab | 1055 | |
d62a17ae | 1056 | /* Create or update route entry. */ |
1057 | route_change = update_evpn_route_entry(bgp, vpn, afi, safi, rn, &attr, | |
1a98c087 | 1058 | 1, 1, &ri, flags); |
d62a17ae | 1059 | assert(ri); |
1060 | attr_new = ri->attr; | |
128ea8ab | 1061 | |
d62a17ae | 1062 | /* Perform route selection; this is just to set the flags correctly |
1063 | * as local route in the VNI always wins. | |
1064 | */ | |
1065 | evpn_route_select_install(bgp, vpn, rn); | |
1066 | bgp_unlock_node(rn); | |
128ea8ab | 1067 | |
d62a17ae | 1068 | /* If this is a new route or some attribute has changed, export the |
1069 | * route to the global table. The route will be advertised to peers | |
1070 | * from there. Note that this table is a 2-level tree (RD-level + | |
1071 | * Prefix-level) similar to L3VPN routes. | |
1072 | */ | |
1073 | if (route_change) { | |
1074 | struct bgp_info *global_ri; | |
128ea8ab | 1075 | |
d62a17ae | 1076 | rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, |
1077 | (struct prefix *)p, &vpn->prd); | |
1078 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, attr_new, 1, 0, | |
1a98c087 | 1079 | &global_ri, flags); |
128ea8ab | 1080 | |
d62a17ae | 1081 | /* Schedule for processing and unlock node. */ |
1082 | bgp_process(bgp, rn, afi, safi); | |
1083 | bgp_unlock_node(rn); | |
1084 | } | |
128ea8ab | 1085 | |
d62a17ae | 1086 | /* Unintern temporary. */ |
1087 | aspath_unintern(&attr.aspath); | |
128ea8ab | 1088 | |
d62a17ae | 1089 | return 0; |
128ea8ab | 1090 | } |
1091 | ||
1092 | /* | |
1093 | * Delete EVPN route entry. This could be in the VNI route table | |
1094 | * or the global route table. | |
1095 | */ | |
d62a17ae | 1096 | static void delete_evpn_route_entry(struct bgp *bgp, struct bgpevpn *vpn, |
1097 | afi_t afi, safi_t safi, struct bgp_node *rn, | |
1098 | struct bgp_info **ri) | |
128ea8ab | 1099 | { |
d62a17ae | 1100 | struct bgp_info *tmp_ri; |
128ea8ab | 1101 | |
d62a17ae | 1102 | *ri = NULL; |
128ea8ab | 1103 | |
d62a17ae | 1104 | /* Now, find matching route. */ |
1105 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) | |
1106 | if (tmp_ri->peer == bgp->peer_self | |
1107 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
1108 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
1109 | break; | |
128ea8ab | 1110 | |
d62a17ae | 1111 | *ri = tmp_ri; |
128ea8ab | 1112 | |
d62a17ae | 1113 | /* Mark route for delete. */ |
1114 | if (tmp_ri) | |
1115 | bgp_info_delete(rn, tmp_ri); | |
128ea8ab | 1116 | } |
1117 | ||
1118 | /* | |
1119 | * Delete EVPN route (of type based on prefix) for specified VNI and | |
1120 | * schedule for processing. | |
1121 | */ | |
d62a17ae | 1122 | static int delete_evpn_route(struct bgp *bgp, struct bgpevpn *vpn, |
1123 | struct prefix_evpn *p) | |
1124 | { | |
1125 | struct bgp_node *rn, *global_rn; | |
1126 | struct bgp_info *ri; | |
1127 | afi_t afi = AFI_L2VPN; | |
1128 | safi_t safi = SAFI_EVPN; | |
1129 | ||
1130 | /* First, locate the route node within the VNI. If it doesn't exist, | |
1131 | * there | |
1132 | * is nothing further to do. | |
1133 | */ | |
1134 | /* NOTE: There is no RD here. */ | |
1135 | rn = bgp_node_lookup(vpn->route_table, (struct prefix *)p); | |
1136 | if (!rn) | |
1137 | return 0; | |
1138 | ||
1139 | /* Next, locate route node in the global EVPN routing table. Note that | |
1140 | * this table is a 2-level tree (RD-level + Prefix-level) similar to | |
1141 | * L3VPN routes. | |
1142 | */ | |
1143 | global_rn = bgp_afi_node_lookup(bgp->rib[afi][safi], afi, safi, | |
1144 | (struct prefix *)p, &vpn->prd); | |
1145 | if (global_rn) { | |
1146 | /* Delete route entry in the global EVPN table. */ | |
1147 | delete_evpn_route_entry(bgp, vpn, afi, safi, global_rn, &ri); | |
1148 | ||
1149 | /* Schedule for processing - withdraws to peers happen from | |
1150 | * this table. | |
1151 | */ | |
1152 | if (ri) | |
1153 | bgp_process(bgp, global_rn, afi, safi); | |
1154 | bgp_unlock_node(global_rn); | |
1155 | } | |
1156 | ||
1157 | /* Delete route entry in the VNI route table. This can just be removed. | |
1158 | */ | |
1159 | delete_evpn_route_entry(bgp, vpn, afi, safi, rn, &ri); | |
1160 | if (ri) | |
1161 | bgp_info_reap(rn, ri); | |
1162 | bgp_unlock_node(rn); | |
1163 | ||
1164 | return 0; | |
128ea8ab | 1165 | } |
1166 | ||
1167 | /* | |
1168 | * Update all type-2 (MACIP) local routes for this VNI - these should also | |
1169 | * be scheduled for advertise to peers. | |
1170 | */ | |
d62a17ae | 1171 | static int update_all_type2_routes(struct bgp *bgp, struct bgpevpn *vpn) |
1172 | { | |
1173 | afi_t afi; | |
1174 | safi_t safi; | |
1175 | struct bgp_node *rn; | |
1176 | struct bgp_info *ri; | |
1177 | struct attr attr; | |
1178 | struct attr attr_sticky; | |
7ec156a9 MK |
1179 | struct attr attr_ip6; |
1180 | struct attr attr_sticky_ip6; | |
d62a17ae | 1181 | struct attr *attr_new; |
1182 | ||
1183 | afi = AFI_L2VPN; | |
1184 | safi = SAFI_EVPN; | |
1185 | memset(&attr, 0, sizeof(struct attr)); | |
1186 | memset(&attr_sticky, 0, sizeof(struct attr)); | |
7ec156a9 MK |
1187 | memset(&attr_ip6, 0, sizeof(struct attr)); |
1188 | memset(&attr_sticky_ip6, 0, sizeof(struct attr)); | |
d62a17ae | 1189 | |
1190 | /* Build path-attribute - all type-2 routes for this VNI will share the | |
1191 | * same path attribute. | |
1192 | */ | |
1193 | bgp_attr_default_set(&attr, BGP_ORIGIN_IGP); | |
1194 | bgp_attr_default_set(&attr_sticky, BGP_ORIGIN_IGP); | |
1195 | attr.nexthop = vpn->originator_ip; | |
1196 | attr.mp_nexthop_global_in = vpn->originator_ip; | |
1197 | attr.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
bc59a672 | 1198 | bgpevpn_get_rmac(vpn, &attr.rmac); |
d62a17ae | 1199 | attr_sticky.nexthop = vpn->originator_ip; |
1200 | attr_sticky.mp_nexthop_global_in = vpn->originator_ip; | |
1201 | attr_sticky.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
1202 | attr_sticky.sticky = 1; | |
bc59a672 | 1203 | bgpevpn_get_rmac(vpn, &attr_sticky.rmac); |
7ec156a9 MK |
1204 | bgp_attr_default_set(&attr_ip6, BGP_ORIGIN_IGP); |
1205 | bgp_attr_default_set(&attr_sticky_ip6, BGP_ORIGIN_IGP); | |
1206 | attr_ip6.nexthop = vpn->originator_ip; | |
1207 | attr_ip6.mp_nexthop_global_in = vpn->originator_ip; | |
1208 | attr_ip6.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
1209 | bgpevpn_get_rmac(vpn, &attr_ip6.rmac); | |
1210 | attr_sticky_ip6.nexthop = vpn->originator_ip; | |
1211 | attr_sticky_ip6.mp_nexthop_global_in = vpn->originator_ip; | |
1212 | attr_sticky_ip6.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
1213 | attr_sticky_ip6.sticky = 1; | |
1214 | bgpevpn_get_rmac(vpn, &attr_sticky_ip6.rmac); | |
d62a17ae | 1215 | |
1216 | /* Set up RT, ENCAP and sticky MAC extended community. */ | |
7ec156a9 MK |
1217 | build_evpn_route_extcomm(vpn, &attr, AFI_IP); |
1218 | build_evpn_route_extcomm(vpn, &attr_sticky, AFI_IP); | |
1219 | build_evpn_route_extcomm(vpn, &attr_ip6, AFI_IP6); | |
1220 | build_evpn_route_extcomm(vpn, &attr_sticky_ip6, AFI_IP6); | |
d62a17ae | 1221 | |
1222 | /* Walk this VNI's route table and update local type-2 routes. For any | |
1223 | * routes updated, update corresponding entry in the global table too. | |
1224 | */ | |
1225 | for (rn = bgp_table_top(vpn->route_table); rn; | |
1226 | rn = bgp_route_next(rn)) { | |
1227 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
1228 | struct bgp_node *rd_rn; | |
1229 | struct bgp_info *global_ri; | |
1230 | ||
1231 | if (evp->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE) | |
1232 | continue; | |
1233 | ||
7ec156a9 MK |
1234 | if (IS_EVPN_PREFIX_IPADDR_V4(evp)) { |
1235 | if (evpn_route_is_sticky(bgp, rn)) | |
1236 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, | |
1237 | &attr_sticky, 0, 1, | |
1238 | &ri, 0); | |
1239 | else | |
1240 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, | |
1241 | &attr, 0, 1, &ri, 0); | |
1242 | } else { | |
1243 | if (evpn_route_is_sticky(bgp, rn)) | |
1244 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, | |
1245 | &attr_sticky_ip6, 0, 1, | |
1246 | &ri, 0); | |
1247 | else | |
1248 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, | |
1249 | &attr_ip6, 0, 1, | |
1250 | &ri, 0); | |
1251 | } | |
d62a17ae | 1252 | |
1253 | /* If a local route exists for this prefix, we need to update | |
1254 | * the global routing table too. | |
1255 | */ | |
1256 | if (!ri) | |
1257 | continue; | |
1258 | ||
1259 | /* Perform route selection; this is just to set the flags | |
1260 | * correctly | |
1261 | * as local route in the VNI always wins. | |
1262 | */ | |
1263 | evpn_route_select_install(bgp, vpn, rn); | |
1264 | ||
1265 | attr_new = ri->attr; | |
1266 | ||
1267 | /* Update route in global routing table. */ | |
1268 | rd_rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, | |
1269 | (struct prefix *)evp, &vpn->prd); | |
1270 | assert(rd_rn); | |
1271 | update_evpn_route_entry(bgp, vpn, afi, safi, rd_rn, attr_new, 0, | |
1a98c087 | 1272 | 0, &global_ri, 0); |
d62a17ae | 1273 | |
1274 | /* Schedule for processing and unlock node. */ | |
1275 | bgp_process(bgp, rd_rn, afi, safi); | |
1276 | bgp_unlock_node(rd_rn); | |
1277 | } | |
1278 | ||
1279 | /* Unintern temporary. */ | |
1280 | aspath_unintern(&attr.aspath); | |
1281 | aspath_unintern(&attr_sticky.aspath); | |
1282 | ||
1283 | return 0; | |
128ea8ab | 1284 | } |
1285 | ||
1286 | /* | |
1287 | * Delete all type-2 (MACIP) local routes for this VNI - only from the | |
1288 | * global routing table. These are also scheduled for withdraw from peers. | |
1289 | */ | |
d62a17ae | 1290 | static int delete_global_type2_routes(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1291 | { |
d62a17ae | 1292 | afi_t afi; |
1293 | safi_t safi; | |
1294 | struct bgp_node *rdrn, *rn; | |
1295 | struct bgp_table *table; | |
1296 | struct bgp_info *ri; | |
128ea8ab | 1297 | |
d62a17ae | 1298 | afi = AFI_L2VPN; |
1299 | safi = SAFI_EVPN; | |
128ea8ab | 1300 | |
d62a17ae | 1301 | rdrn = bgp_node_lookup(bgp->rib[afi][safi], (struct prefix *)&vpn->prd); |
1302 | if (rdrn && rdrn->info) { | |
1303 | table = (struct bgp_table *)rdrn->info; | |
1304 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) { | |
1305 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
128ea8ab | 1306 | |
d62a17ae | 1307 | if (evp->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE) |
1308 | continue; | |
128ea8ab | 1309 | |
d62a17ae | 1310 | delete_evpn_route_entry(bgp, vpn, afi, safi, rn, &ri); |
1311 | if (ri) | |
1312 | bgp_process(bgp, rn, afi, safi); | |
1313 | } | |
1314 | } | |
128ea8ab | 1315 | |
d62a17ae | 1316 | /* Unlock RD node. */ |
1317 | if (rdrn) | |
1318 | bgp_unlock_node(rdrn); | |
128ea8ab | 1319 | |
d62a17ae | 1320 | return 0; |
128ea8ab | 1321 | } |
1322 | ||
1323 | /* | |
1324 | * Delete all type-2 (MACIP) local routes for this VNI - from the global | |
1325 | * table as well as the per-VNI route table. | |
1326 | */ | |
d62a17ae | 1327 | static int delete_all_type2_routes(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1328 | { |
d62a17ae | 1329 | afi_t afi; |
1330 | safi_t safi; | |
1331 | struct bgp_node *rn; | |
1332 | struct bgp_info *ri; | |
128ea8ab | 1333 | |
d62a17ae | 1334 | afi = AFI_L2VPN; |
1335 | safi = SAFI_EVPN; | |
128ea8ab | 1336 | |
d62a17ae | 1337 | /* First, walk the global route table for this VNI's type-2 local |
1338 | * routes. | |
1339 | * EVPN routes are a 2-level table, first get the RD table. | |
1340 | */ | |
1341 | delete_global_type2_routes(bgp, vpn); | |
128ea8ab | 1342 | |
d62a17ae | 1343 | /* Next, walk this VNI's route table and delete local type-2 routes. */ |
1344 | for (rn = bgp_table_top(vpn->route_table); rn; | |
1345 | rn = bgp_route_next(rn)) { | |
1346 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
128ea8ab | 1347 | |
d62a17ae | 1348 | if (evp->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE) |
1349 | continue; | |
128ea8ab | 1350 | |
d62a17ae | 1351 | delete_evpn_route_entry(bgp, vpn, afi, safi, rn, &ri); |
128ea8ab | 1352 | |
d62a17ae | 1353 | /* Route entry in local table gets deleted immediately. */ |
1354 | if (ri) | |
1355 | bgp_info_reap(rn, ri); | |
1356 | } | |
128ea8ab | 1357 | |
d62a17ae | 1358 | return 0; |
128ea8ab | 1359 | } |
1360 | ||
1361 | /* | |
1362 | * Delete all routes in the per-VNI route table. | |
1363 | */ | |
d62a17ae | 1364 | static int delete_all_vni_routes(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1365 | { |
d62a17ae | 1366 | struct bgp_node *rn; |
1367 | struct bgp_info *ri, *nextri; | |
128ea8ab | 1368 | |
d62a17ae | 1369 | /* Walk this VNI's route table and delete all routes. */ |
1370 | for (rn = bgp_table_top(vpn->route_table); rn; | |
1371 | rn = bgp_route_next(rn)) { | |
1372 | for (ri = rn->info; (ri != NULL) && (nextri = ri->next, 1); | |
1373 | ri = nextri) { | |
1374 | bgp_info_delete(rn, ri); | |
1375 | bgp_info_reap(rn, ri); | |
1376 | } | |
1377 | } | |
128ea8ab | 1378 | |
d62a17ae | 1379 | return 0; |
128ea8ab | 1380 | } |
1381 | ||
1382 | /* | |
1383 | * Update (and advertise) local routes for a VNI. Invoked upon the VNI | |
1384 | * export RT getting modified or change to tunnel IP. Note that these | |
1385 | * situations need the route in the per-VNI table as well as the global | |
1386 | * table to be updated (as attributes change). | |
1387 | */ | |
d62a17ae | 1388 | static int update_routes_for_vni(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1389 | { |
d62a17ae | 1390 | int ret; |
1391 | struct prefix_evpn p; | |
128ea8ab | 1392 | |
d62a17ae | 1393 | /* Update and advertise the type-3 route (only one) followed by the |
1394 | * locally learnt type-2 routes (MACIP) - for this VNI. | |
1395 | */ | |
1396 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
1397 | ret = update_evpn_route(bgp, vpn, &p, 0); | |
1398 | if (ret) | |
1399 | return ret; | |
128ea8ab | 1400 | |
d62a17ae | 1401 | return update_all_type2_routes(bgp, vpn); |
128ea8ab | 1402 | } |
1403 | ||
1404 | /* | |
1405 | * Delete (and withdraw) local routes for specified VNI from the global | |
1406 | * table and per-VNI table. After this, remove all other routes from | |
1407 | * the per-VNI table. Invoked upon the VNI being deleted or EVPN | |
1408 | * (advertise-all-vni) being disabled. | |
1409 | */ | |
d62a17ae | 1410 | static int delete_routes_for_vni(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1411 | { |
d62a17ae | 1412 | int ret; |
1413 | struct prefix_evpn p; | |
128ea8ab | 1414 | |
d62a17ae | 1415 | /* Delete and withdraw locally learnt type-2 routes (MACIP) |
1416 | * followed by type-3 routes (only one) - for this VNI. | |
1417 | */ | |
1418 | ret = delete_all_type2_routes(bgp, vpn); | |
1419 | if (ret) | |
1420 | return ret; | |
128ea8ab | 1421 | |
d62a17ae | 1422 | build_evpn_type3_prefix(&p, vpn->originator_ip); |
1423 | ret = delete_evpn_route(bgp, vpn, &p); | |
1424 | if (ret) | |
1425 | return ret; | |
128ea8ab | 1426 | |
d62a17ae | 1427 | /* Delete all routes from the per-VNI table. */ |
1428 | return delete_all_vni_routes(bgp, vpn); | |
128ea8ab | 1429 | } |
1430 | ||
1431 | /* | |
1432 | * There is a tunnel endpoint IP address change for this VNI, | |
1433 | * need to re-advertise routes with the new nexthop. | |
1434 | */ | |
d62a17ae | 1435 | static int handle_tunnel_ip_change(struct bgp *bgp, struct bgpevpn *vpn, |
1436 | struct in_addr originator_ip) | |
128ea8ab | 1437 | { |
d62a17ae | 1438 | struct prefix_evpn p; |
128ea8ab | 1439 | |
ddd16ed5 MK |
1440 | /* If VNI is not live, we only need to update the originator ip */ |
1441 | if (!is_vni_live(vpn)) { | |
1442 | vpn->originator_ip = originator_ip; | |
1443 | return 0; | |
1444 | } | |
1445 | ||
db0e1937 MK |
1446 | /* Update the tunnel-ip hash */ |
1447 | bgp_tip_del(bgp, &vpn->originator_ip); | |
1448 | bgp_tip_add(bgp, &originator_ip); | |
1449 | ||
1450 | /* filter routes as martian nexthop db has changed */ | |
1451 | bgp_filter_evpn_routes_upon_martian_nh_change(bgp); | |
1452 | ||
d62a17ae | 1453 | /* Need to withdraw type-3 route as the originator IP is part |
1454 | * of the key. | |
1455 | */ | |
1456 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
1457 | delete_evpn_route(bgp, vpn, &p); | |
128ea8ab | 1458 | |
d62a17ae | 1459 | /* Update the tunnel IP and re-advertise all routes for this VNI. */ |
1460 | vpn->originator_ip = originator_ip; | |
1461 | return update_routes_for_vni(bgp, vpn); | |
128ea8ab | 1462 | } |
1463 | ||
d3135ba3 | 1464 | /* |
1465 | * Install route entry into the VRF routing table and invoke route selection. | |
1466 | */ | |
1467 | static int install_evpn_route_entry_in_vrf(struct bgp *bgp_vrf, | |
1468 | struct prefix_evpn *evp, | |
1469 | struct bgp_info *parent_ri) | |
1470 | { | |
1471 | struct bgp_node *rn; | |
1472 | struct bgp_info *ri; | |
1473 | struct attr *attr_new; | |
c4edf708 | 1474 | int ret = 0; |
d3135ba3 | 1475 | struct prefix p; |
1476 | struct prefix *pp = &p; | |
1477 | afi_t afi = 0; | |
1478 | safi_t safi = 0; | |
1eb88002 MK |
1479 | char buf[PREFIX_STRLEN]; |
1480 | char buf1[PREFIX_STRLEN]; | |
d3135ba3 | 1481 | |
1482 | memset(pp, 0, sizeof(struct prefix)); | |
1483 | ip_prefix_from_type2_prefix(evp, pp); | |
1484 | ||
1eb88002 MK |
1485 | if (bgp_debug_zebra(NULL)) { |
1486 | zlog_debug("installing evpn prefix %s as ip prefix %s in vrf %s", | |
1487 | prefix2str(evp, buf, sizeof(buf)), | |
1488 | prefix2str(pp, buf1, sizeof(buf)), | |
1489 | vrf_id_to_name(bgp_vrf->vrf_id)); | |
1490 | } | |
1491 | ||
d3135ba3 | 1492 | /* Create (or fetch) route within the VRF. */ |
1493 | /* NOTE: There is no RD here. */ | |
1494 | if (IS_EVPN_PREFIX_IPADDR_V4(evp)) { | |
1495 | afi = AFI_IP; | |
1496 | safi = SAFI_UNICAST; | |
1497 | rn = bgp_node_get(bgp_vrf->rib[afi][safi], pp); | |
1498 | } else if (IS_EVPN_PREFIX_IPADDR_V6(evp)) { | |
1499 | afi = AFI_IP6; | |
1500 | safi = SAFI_UNICAST; | |
1501 | rn = bgp_node_get(bgp_vrf->rib[afi][safi], pp); | |
1502 | } else | |
1503 | return 0; | |
1504 | ||
1505 | /* Check if route entry is already present. */ | |
1506 | for (ri = rn->info; ri; ri = ri->next) | |
1507 | if (ri->extra | |
1508 | && (struct bgp_info *)ri->extra->parent == parent_ri) | |
1509 | break; | |
1510 | ||
1511 | if (!ri) { | |
1512 | /* Add (or update) attribute to hash. */ | |
1513 | attr_new = bgp_attr_intern(parent_ri->attr); | |
1514 | ||
1515 | /* Create new route with its attribute. */ | |
1516 | ri = info_make(parent_ri->type, parent_ri->sub_type, 0, | |
1517 | parent_ri->peer, attr_new, rn); | |
1518 | SET_FLAG(ri->flags, BGP_INFO_VALID); | |
1519 | bgp_info_extra_get(ri); | |
1520 | ri->extra->parent = parent_ri; | |
1521 | if (parent_ri->extra) | |
1522 | memcpy(&ri->extra->label, &parent_ri->extra->label, | |
1523 | BGP_LABEL_BYTES); | |
1524 | bgp_info_add(rn, ri); | |
1525 | } else { | |
1526 | if (attrhash_cmp(ri->attr, parent_ri->attr) | |
1527 | && !CHECK_FLAG(ri->flags, BGP_INFO_REMOVED)) { | |
1528 | bgp_unlock_node(rn); | |
1529 | return 0; | |
1530 | } | |
1531 | /* The attribute has changed. */ | |
1532 | /* Add (or update) attribute to hash. */ | |
1533 | attr_new = bgp_attr_intern(parent_ri->attr); | |
1534 | ||
1535 | /* Restore route, if needed. */ | |
1536 | if (CHECK_FLAG(ri->flags, BGP_INFO_REMOVED)) | |
1537 | bgp_info_restore(rn, ri); | |
1538 | ||
1539 | /* Mark if nexthop has changed. */ | |
1540 | if (!IPV4_ADDR_SAME(&ri->attr->nexthop, &attr_new->nexthop)) | |
1541 | SET_FLAG(ri->flags, BGP_INFO_IGP_CHANGED); | |
1542 | ||
1543 | /* Unintern existing, set to new. */ | |
1544 | bgp_attr_unintern(&ri->attr); | |
1545 | ri->attr = attr_new; | |
1546 | ri->uptime = bgp_clock(); | |
1547 | } | |
1548 | ||
1549 | /* Perform route selection and update zebra, if required. */ | |
1eb88002 | 1550 | bgp_process(bgp_vrf, rn, afi, safi); |
d3135ba3 | 1551 | |
1552 | return ret; | |
1553 | } | |
1554 | ||
128ea8ab | 1555 | /* |
1556 | * Install route entry into the VNI routing table and invoke route selection. | |
1557 | */ | |
d62a17ae | 1558 | static int install_evpn_route_entry(struct bgp *bgp, struct bgpevpn *vpn, |
1559 | struct prefix_evpn *p, | |
1560 | struct bgp_info *parent_ri) | |
1561 | { | |
1562 | struct bgp_node *rn; | |
1563 | struct bgp_info *ri; | |
1564 | struct attr *attr_new; | |
1565 | int ret; | |
1566 | ||
1567 | /* Create (or fetch) route within the VNI. */ | |
1568 | /* NOTE: There is no RD here. */ | |
1569 | rn = bgp_node_get(vpn->route_table, (struct prefix *)p); | |
1570 | ||
1571 | /* Check if route entry is already present. */ | |
1572 | for (ri = rn->info; ri; ri = ri->next) | |
1573 | if (ri->extra | |
1574 | && (struct bgp_info *)ri->extra->parent == parent_ri) | |
1575 | break; | |
1576 | ||
1577 | if (!ri) { | |
1578 | /* Add (or update) attribute to hash. */ | |
1579 | attr_new = bgp_attr_intern(parent_ri->attr); | |
1580 | ||
1581 | /* Create new route with its attribute. */ | |
1582 | ri = info_make(parent_ri->type, parent_ri->sub_type, 0, | |
1583 | parent_ri->peer, attr_new, rn); | |
1584 | SET_FLAG(ri->flags, BGP_INFO_VALID); | |
1585 | bgp_info_extra_get(ri); | |
1586 | ri->extra->parent = parent_ri; | |
1587 | if (parent_ri->extra) | |
1588 | memcpy(&ri->extra->label, &parent_ri->extra->label, | |
1589 | BGP_LABEL_BYTES); | |
1590 | bgp_info_add(rn, ri); | |
1591 | } else { | |
1592 | if (attrhash_cmp(ri->attr, parent_ri->attr) | |
1593 | && !CHECK_FLAG(ri->flags, BGP_INFO_REMOVED)) { | |
1594 | bgp_unlock_node(rn); | |
1595 | return 0; | |
1596 | } | |
1597 | /* The attribute has changed. */ | |
1598 | /* Add (or update) attribute to hash. */ | |
1599 | attr_new = bgp_attr_intern(parent_ri->attr); | |
1600 | ||
1601 | /* Restore route, if needed. */ | |
1602 | if (CHECK_FLAG(ri->flags, BGP_INFO_REMOVED)) | |
1603 | bgp_info_restore(rn, ri); | |
1604 | ||
1605 | /* Mark if nexthop has changed. */ | |
1606 | if (!IPV4_ADDR_SAME(&ri->attr->nexthop, &attr_new->nexthop)) | |
1607 | SET_FLAG(ri->flags, BGP_INFO_IGP_CHANGED); | |
1608 | ||
1609 | /* Unintern existing, set to new. */ | |
1610 | bgp_attr_unintern(&ri->attr); | |
1611 | ri->attr = attr_new; | |
1612 | ri->uptime = bgp_clock(); | |
1613 | } | |
1614 | ||
1615 | /* Perform route selection and update zebra, if required. */ | |
1616 | ret = evpn_route_select_install(bgp, vpn, rn); | |
1617 | ||
1618 | return ret; | |
128ea8ab | 1619 | } |
1620 | ||
d3135ba3 | 1621 | /* |
1622 | * Uninstall route entry from the VRF routing table and send message | |
1623 | * to zebra, if appropriate. | |
1624 | */ | |
1625 | static int uninstall_evpn_route_entry_in_vrf(struct bgp *bgp_vrf, | |
1626 | struct prefix_evpn *evp, | |
1627 | struct bgp_info *parent_ri) | |
1628 | { | |
1629 | struct bgp_node *rn; | |
1630 | struct bgp_info *ri; | |
c4edf708 | 1631 | int ret = 0; |
d3135ba3 | 1632 | struct prefix p; |
1633 | struct prefix *pp = &p; | |
1634 | afi_t afi = 0; | |
1635 | safi_t safi = 0; | |
1eb88002 MK |
1636 | char buf[PREFIX_STRLEN]; |
1637 | char buf1[PREFIX_STRLEN]; | |
d3135ba3 | 1638 | |
1639 | memset(pp, 0, sizeof(struct prefix)); | |
1640 | ip_prefix_from_type2_prefix(evp, pp); | |
1641 | ||
1eb88002 | 1642 | if (bgp_debug_zebra(NULL)) { |
30a30f57 | 1643 | zlog_debug("uninstalling evpn prefix %s as ip prefix %s in vrf %s", |
1eb88002 MK |
1644 | prefix2str(evp, buf, sizeof(buf)), |
1645 | prefix2str(pp, buf1, sizeof(buf)), | |
1646 | vrf_id_to_name(bgp_vrf->vrf_id)); | |
1647 | } | |
1648 | ||
d3135ba3 | 1649 | /* Locate route within the VRF. */ |
1650 | /* NOTE: There is no RD here. */ | |
1651 | if (IS_EVPN_PREFIX_IPADDR_V4(evp)) { | |
1652 | afi = AFI_IP; | |
1653 | safi = SAFI_UNICAST; | |
1654 | rn = bgp_node_lookup(bgp_vrf->rib[afi][safi], pp); | |
1655 | } else { | |
1656 | afi = AFI_IP6; | |
1657 | safi = SAFI_UNICAST; | |
1658 | rn = bgp_node_lookup(bgp_vrf->rib[afi][safi], pp); | |
1659 | } | |
1660 | ||
1661 | if (!rn) | |
1662 | return 0; | |
1663 | ||
1664 | /* Find matching route entry. */ | |
1665 | for (ri = rn->info; ri; ri = ri->next) | |
1666 | if (ri->extra | |
1667 | && (struct bgp_info *)ri->extra->parent == parent_ri) | |
1668 | break; | |
1669 | ||
1670 | if (!ri) | |
1671 | return 0; | |
1672 | ||
1673 | /* Mark entry for deletion */ | |
1674 | bgp_info_delete(rn, ri); | |
1675 | ||
1676 | /* Perform route selection and update zebra, if required. */ | |
1eb88002 | 1677 | bgp_process(bgp_vrf, rn, afi, safi); |
d3135ba3 | 1678 | |
1679 | /* Unlock route node. */ | |
1680 | bgp_unlock_node(rn); | |
1681 | ||
1682 | return ret; | |
1683 | } | |
1684 | ||
128ea8ab | 1685 | /* |
1686 | * Uninstall route entry from the VNI routing table and send message | |
1687 | * to zebra, if appropriate. | |
1688 | */ | |
d62a17ae | 1689 | static int uninstall_evpn_route_entry(struct bgp *bgp, struct bgpevpn *vpn, |
1690 | struct prefix_evpn *p, | |
1691 | struct bgp_info *parent_ri) | |
128ea8ab | 1692 | { |
d62a17ae | 1693 | struct bgp_node *rn; |
1694 | struct bgp_info *ri; | |
1695 | int ret; | |
128ea8ab | 1696 | |
d62a17ae | 1697 | /* Locate route within the VNI. */ |
1698 | /* NOTE: There is no RD here. */ | |
1699 | rn = bgp_node_lookup(vpn->route_table, (struct prefix *)p); | |
1700 | if (!rn) | |
1701 | return 0; | |
128ea8ab | 1702 | |
d62a17ae | 1703 | /* Find matching route entry. */ |
1704 | for (ri = rn->info; ri; ri = ri->next) | |
1705 | if (ri->extra | |
1706 | && (struct bgp_info *)ri->extra->parent == parent_ri) | |
1707 | break; | |
128ea8ab | 1708 | |
d62a17ae | 1709 | if (!ri) |
1710 | return 0; | |
128ea8ab | 1711 | |
d62a17ae | 1712 | /* Mark entry for deletion */ |
1713 | bgp_info_delete(rn, ri); | |
128ea8ab | 1714 | |
d62a17ae | 1715 | /* Perform route selection and update zebra, if required. */ |
1716 | ret = evpn_route_select_install(bgp, vpn, rn); | |
128ea8ab | 1717 | |
d62a17ae | 1718 | /* Unlock route node. */ |
1719 | bgp_unlock_node(rn); | |
128ea8ab | 1720 | |
d62a17ae | 1721 | return ret; |
128ea8ab | 1722 | } |
1723 | ||
5ba238b7 MK |
1724 | /* |
1725 | * Given a route entry and a VRF, see if this route entry should be | |
1726 | * imported into the VRF i.e., RTs match. | |
1727 | */ | |
1728 | static int is_route_matching_for_vrf(struct bgp *bgp_vrf, | |
1729 | struct bgp_info *ri) | |
1730 | { | |
1731 | struct attr *attr = ri->attr; | |
1732 | struct ecommunity *ecom; | |
1733 | int i; | |
1734 | ||
1735 | assert(attr); | |
1736 | /* Route should have valid RT to be even considered. */ | |
1737 | if (!(attr->flag & ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES))) | |
1738 | return 0; | |
1739 | ||
1740 | ecom = attr->ecommunity; | |
1741 | if (!ecom || !ecom->size) | |
1742 | return 0; | |
1743 | ||
1744 | /* For each extended community RT, see if it matches this VNI. If any RT | |
1745 | * matches, we're done. | |
1746 | */ | |
1747 | for (i = 0; i < ecom->size; i++) { | |
1748 | u_char *pnt; | |
1749 | u_char type, sub_type; | |
1750 | struct ecommunity_val *eval; | |
1751 | struct ecommunity_val eval_tmp; | |
1752 | struct vrf_irt_node *irt; | |
1753 | ||
1754 | /* Only deal with RTs */ | |
1755 | pnt = (ecom->val + (i * ECOMMUNITY_SIZE)); | |
1756 | eval = (struct ecommunity_val *)(ecom->val | |
1757 | + (i * ECOMMUNITY_SIZE)); | |
1758 | type = *pnt++; | |
1759 | sub_type = *pnt++; | |
1760 | if (sub_type != ECOMMUNITY_ROUTE_TARGET) | |
1761 | continue; | |
1762 | ||
1763 | /* See if this RT matches specified VNIs import RTs */ | |
1764 | irt = lookup_vrf_import_rt(eval); | |
1765 | if (irt && irt->vrfs) | |
1766 | if (is_vrf_present_in_irt_vrfs(irt->vrfs, bgp_vrf)) | |
1767 | return 1; | |
1768 | ||
1769 | /* Also check for non-exact match. In this, we mask out the AS | |
1770 | * and | |
1771 | * only check on the local-admin sub-field. This is to | |
1772 | * facilitate using | |
1773 | * VNI as the RT for EBGP peering too. | |
1774 | */ | |
1775 | irt = NULL; | |
1776 | if (type == ECOMMUNITY_ENCODE_AS | |
1777 | || type == ECOMMUNITY_ENCODE_AS4 | |
1778 | || type == ECOMMUNITY_ENCODE_IP) { | |
1779 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
1780 | mask_ecom_global_admin(&eval_tmp, eval); | |
1781 | irt = lookup_vrf_import_rt(&eval_tmp); | |
1782 | } | |
1783 | if (irt && irt->vrfs) | |
1784 | if (is_vrf_present_in_irt_vrfs(irt->vrfs, bgp_vrf)) | |
1785 | return 1; | |
1786 | } | |
1787 | ||
1788 | return 0; | |
1789 | } | |
1790 | ||
128ea8ab | 1791 | /* |
1792 | * Given a route entry and a VNI, see if this route entry should be | |
1793 | * imported into the VNI i.e., RTs match. | |
1794 | */ | |
d62a17ae | 1795 | static int is_route_matching_for_vni(struct bgp *bgp, struct bgpevpn *vpn, |
1796 | struct bgp_info *ri) | |
1797 | { | |
1798 | struct attr *attr = ri->attr; | |
1799 | struct ecommunity *ecom; | |
1800 | int i; | |
1801 | ||
1802 | assert(attr); | |
1803 | /* Route should have valid RT to be even considered. */ | |
1804 | if (!(attr->flag & ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES))) | |
1805 | return 0; | |
1806 | ||
1807 | ecom = attr->ecommunity; | |
1808 | if (!ecom || !ecom->size) | |
1809 | return 0; | |
1810 | ||
1811 | /* For each extended community RT, see if it matches this VNI. If any RT | |
1812 | * matches, we're done. | |
1813 | */ | |
1814 | for (i = 0; i < ecom->size; i++) { | |
1815 | u_char *pnt; | |
1816 | u_char type, sub_type; | |
1817 | struct ecommunity_val *eval; | |
1818 | struct ecommunity_val eval_tmp; | |
1819 | struct irt_node *irt; | |
1820 | ||
1821 | /* Only deal with RTs */ | |
1822 | pnt = (ecom->val + (i * ECOMMUNITY_SIZE)); | |
1823 | eval = (struct ecommunity_val *)(ecom->val | |
1824 | + (i * ECOMMUNITY_SIZE)); | |
1825 | type = *pnt++; | |
1826 | sub_type = *pnt++; | |
1827 | if (sub_type != ECOMMUNITY_ROUTE_TARGET) | |
1828 | continue; | |
1829 | ||
1830 | /* See if this RT matches specified VNIs import RTs */ | |
1831 | irt = lookup_import_rt(bgp, eval); | |
1832 | if (irt && irt->vnis) | |
1833 | if (is_vni_present_in_irt_vnis(irt->vnis, vpn)) | |
1834 | return 1; | |
1835 | ||
1836 | /* Also check for non-exact match. In this, we mask out the AS | |
1837 | * and | |
1838 | * only check on the local-admin sub-field. This is to | |
1839 | * facilitate using | |
1840 | * VNI as the RT for EBGP peering too. | |
1841 | */ | |
1842 | irt = NULL; | |
1843 | if (type == ECOMMUNITY_ENCODE_AS | |
1844 | || type == ECOMMUNITY_ENCODE_AS4 | |
1845 | || type == ECOMMUNITY_ENCODE_IP) { | |
1846 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
1847 | mask_ecom_global_admin(&eval_tmp, eval); | |
1848 | irt = lookup_import_rt(bgp, &eval_tmp); | |
1849 | } | |
1850 | if (irt && irt->vnis) | |
1851 | if (is_vni_present_in_irt_vnis(irt->vnis, vpn)) | |
1852 | return 1; | |
1853 | } | |
1854 | ||
1855 | return 0; | |
128ea8ab | 1856 | } |
1857 | ||
5ba238b7 MK |
1858 | /* |
1859 | * Install or uninstall mac-ip routes are appropriate for this | |
1860 | * particular VRF. | |
1861 | */ | |
1862 | static int install_uninstall_routes_for_vrf(struct bgp *bgp_vrf, | |
1863 | int install) | |
1864 | { | |
1865 | afi_t afi; | |
1866 | safi_t safi; | |
1867 | struct bgp_node *rd_rn, *rn; | |
1868 | struct bgp_table *table; | |
1869 | struct bgp_info *ri; | |
1870 | int ret; | |
1871 | char buf[PREFIX_STRLEN]; | |
1872 | struct bgp *bgp_def = NULL; | |
1873 | ||
1874 | afi = AFI_L2VPN; | |
1875 | safi = SAFI_EVPN; | |
1876 | bgp_def = bgp_get_default(); | |
1877 | if (!bgp_def) | |
1878 | return -1; | |
1879 | ||
1880 | /* Walk entire global routing table and evaluate routes which could be | |
1881 | * imported into this VRF. Note that we need to loop through all global | |
1882 | * routes to determine which route matches the import rt on vrf | |
1883 | */ | |
1884 | for (rd_rn = bgp_table_top(bgp_def->rib[afi][safi]); rd_rn; | |
1885 | rd_rn = bgp_route_next(rd_rn)) { | |
1886 | table = (struct bgp_table *)(rd_rn->info); | |
1887 | if (!table) | |
1888 | continue; | |
1889 | ||
1890 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) { | |
1891 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
1892 | ||
1eb88002 | 1893 | /* if not mac-ip route skip this route */ |
5ba238b7 MK |
1894 | if (evp->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE) |
1895 | continue; | |
1896 | ||
1eb88002 MK |
1897 | /* if not a mac+ip route skip this route */ |
1898 | if (!(IS_EVPN_PREFIX_IPADDR_V4(evp) || | |
1899 | IS_EVPN_PREFIX_IPADDR_V6(evp))) | |
1900 | continue; | |
1901 | ||
5ba238b7 MK |
1902 | for (ri = rn->info; ri; ri = ri->next) { |
1903 | /* Consider "valid" remote routes applicable for | |
1904 | * this VRF. */ | |
1905 | if (!(CHECK_FLAG(ri->flags, BGP_INFO_VALID) | |
1906 | && ri->type == ZEBRA_ROUTE_BGP | |
1907 | && ri->sub_type == BGP_ROUTE_NORMAL)) | |
1908 | continue; | |
1909 | ||
1910 | if (is_route_matching_for_vrf(bgp_vrf, ri)) { | |
1911 | if (install) | |
1912 | ret = | |
1913 | install_evpn_route_entry_in_vrf( | |
1914 | bgp_vrf, evp, ri); | |
1915 | else | |
1916 | ret = | |
1917 | uninstall_evpn_route_entry_in_vrf( | |
1918 | bgp_vrf, evp, ri); | |
1919 | ||
1920 | if (ret) { | |
1921 | zlog_err( | |
1922 | "Failed to %s EVPN %s route in VRF %s", | |
1923 | install ? "install" | |
1924 | : "uninstall", | |
1925 | prefix2str(evp, buf, | |
1926 | sizeof(buf)), | |
1927 | vrf_id_to_name(bgp_vrf->vrf_id)); | |
1928 | return ret; | |
1929 | } | |
1930 | } | |
1931 | } | |
1932 | } | |
1933 | } | |
1934 | ||
1935 | return 0; | |
1936 | } | |
1937 | ||
128ea8ab | 1938 | /* |
1939 | * Install or uninstall routes of specified type that are appropriate for this | |
1940 | * particular VNI. | |
1941 | */ | |
d62a17ae | 1942 | static int install_uninstall_routes_for_vni(struct bgp *bgp, |
1943 | struct bgpevpn *vpn, | |
1944 | bgp_evpn_route_type rtype, | |
1945 | int install) | |
1946 | { | |
0291c246 MK |
1947 | afi_t afi; |
1948 | safi_t safi; | |
1949 | struct bgp_node *rd_rn, *rn; | |
1950 | struct bgp_table *table; | |
1951 | struct bgp_info *ri; | |
1952 | int ret; | |
d62a17ae | 1953 | |
1954 | afi = AFI_L2VPN; | |
1955 | safi = SAFI_EVPN; | |
1956 | ||
1957 | /* Walk entire global routing table and evaluate routes which could be | |
1958 | * imported into this VPN. Note that we cannot just look at the routes | |
1959 | * for | |
1960 | * the VNI's RD - remote routes applicable for this VNI could have any | |
1961 | * RD. | |
1962 | */ | |
1963 | /* EVPN routes are a 2-level table. */ | |
1964 | for (rd_rn = bgp_table_top(bgp->rib[afi][safi]); rd_rn; | |
1965 | rd_rn = bgp_route_next(rd_rn)) { | |
1966 | table = (struct bgp_table *)(rd_rn->info); | |
1967 | if (!table) | |
1968 | continue; | |
1969 | ||
1970 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) { | |
1971 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
1972 | ||
1973 | if (evp->prefix.route_type != rtype) | |
1974 | continue; | |
1975 | ||
1976 | for (ri = rn->info; ri; ri = ri->next) { | |
1977 | /* Consider "valid" remote routes applicable for | |
1978 | * this VNI. */ | |
1979 | if (!(CHECK_FLAG(ri->flags, BGP_INFO_VALID) | |
1980 | && ri->type == ZEBRA_ROUTE_BGP | |
1981 | && ri->sub_type == BGP_ROUTE_NORMAL)) | |
1982 | continue; | |
1983 | ||
1984 | if (is_route_matching_for_vni(bgp, vpn, ri)) { | |
1985 | if (install) | |
1986 | ret = install_evpn_route_entry( | |
60466a63 | 1987 | bgp, vpn, evp, ri); |
d62a17ae | 1988 | else |
1989 | ret = uninstall_evpn_route_entry( | |
1990 | bgp, vpn, evp, ri); | |
1991 | ||
1992 | if (ret) { | |
1993 | zlog_err( | |
1994 | "%u: Failed to %s EVPN %s route in VNI %u", | |
1995 | bgp->vrf_id, | |
1996 | install ? "install" | |
1997 | : "uninstall", | |
1998 | rtype == BGP_EVPN_MAC_IP_ROUTE | |
1999 | ? "MACIP" | |
2000 | : "IMET", | |
2001 | vpn->vni); | |
2002 | return ret; | |
2003 | } | |
2004 | } | |
2005 | } | |
2006 | } | |
2007 | } | |
2008 | ||
2009 | return 0; | |
128ea8ab | 2010 | } |
2011 | ||
5ba238b7 MK |
2012 | /* Install any existing remote routes applicable for this VRF into VRF RIB. This |
2013 | * is invoked upon l3vni-add or l3vni import rt change */ | |
2014 | static int install_routes_for_vrf(struct bgp *bgp_vrf) | |
2015 | { | |
2016 | install_uninstall_routes_for_vrf(bgp_vrf, 1); | |
2017 | return 0; | |
2018 | } | |
2019 | ||
128ea8ab | 2020 | /* |
2021 | * Install any existing remote routes applicable for this VNI into its | |
2022 | * routing table. This is invoked when a VNI becomes "live" or its Import | |
2023 | * RT is changed. | |
2024 | */ | |
d62a17ae | 2025 | static int install_routes_for_vni(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 2026 | { |
d62a17ae | 2027 | int ret; |
128ea8ab | 2028 | |
d62a17ae | 2029 | /* Install type-3 routes followed by type-2 routes - the ones applicable |
2030 | * for this VNI. | |
2031 | */ | |
2032 | ret = install_uninstall_routes_for_vni(bgp, vpn, BGP_EVPN_IMET_ROUTE, | |
2033 | 1); | |
2034 | if (ret) | |
2035 | return ret; | |
128ea8ab | 2036 | |
d62a17ae | 2037 | return install_uninstall_routes_for_vni(bgp, vpn, BGP_EVPN_MAC_IP_ROUTE, |
2038 | 1); | |
128ea8ab | 2039 | } |
2040 | ||
5ba238b7 MK |
2041 | /* uninstall routes from l3vni vrf. */ |
2042 | static int uninstall_routes_for_vrf(struct bgp *bgp_vrf) | |
2043 | { | |
2044 | install_uninstall_routes_for_vrf(bgp_vrf, 0); | |
2045 | return 0; | |
2046 | } | |
2047 | ||
90e60aa7 | 2048 | /* |
2049 | * Uninstall any existing remote routes for this VNI. One scenario in which | |
2050 | * this is invoked is upon an import RT change. | |
2051 | */ | |
d62a17ae | 2052 | static int uninstall_routes_for_vni(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 2053 | { |
d62a17ae | 2054 | int ret; |
90e60aa7 | 2055 | |
d62a17ae | 2056 | /* Uninstall type-2 routes followed by type-3 routes - the ones |
2057 | * applicable | |
2058 | * for this VNI. | |
2059 | */ | |
2060 | ret = install_uninstall_routes_for_vni(bgp, vpn, BGP_EVPN_MAC_IP_ROUTE, | |
2061 | 0); | |
2062 | if (ret) | |
2063 | return ret; | |
90e60aa7 | 2064 | |
d62a17ae | 2065 | return install_uninstall_routes_for_vni(bgp, vpn, BGP_EVPN_IMET_ROUTE, |
2066 | 0); | |
90e60aa7 | 2067 | } |
2068 | ||
d3135ba3 | 2069 | /* |
2070 | * Install or uninstall route in matching VRFs (list). | |
2071 | */ | |
2072 | static int install_uninstall_route_in_vrfs(struct bgp *bgp_def, afi_t afi, | |
2073 | safi_t safi, struct prefix_evpn *evp, | |
2074 | struct bgp_info *ri, | |
2075 | struct list *vrfs, int install) | |
2076 | { | |
2077 | char buf[PREFIX2STR_BUFFER]; | |
2078 | struct bgp *bgp_vrf; | |
2079 | struct listnode *node, *nnode; | |
2080 | ||
2081 | /* Only type-2 routes go into a VRF */ | |
2082 | if (!(evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE)) | |
2083 | return 0; | |
2084 | ||
30a30f57 MK |
2085 | /* if not a mac+ip route skip this route */ |
2086 | if (!(IS_EVPN_PREFIX_IPADDR_V4(evp) || | |
2087 | IS_EVPN_PREFIX_IPADDR_V6(evp))) | |
2088 | return 0; | |
2089 | ||
d3135ba3 | 2090 | for (ALL_LIST_ELEMENTS(vrfs, node, nnode, bgp_vrf)) { |
2091 | int ret; | |
2092 | ||
2093 | if (install) | |
2094 | ret = install_evpn_route_entry_in_vrf(bgp_vrf, | |
2095 | evp, ri); | |
2096 | else | |
2097 | ret = uninstall_evpn_route_entry_in_vrf(bgp_vrf, | |
2098 | evp, ri); | |
2099 | ||
2100 | if (ret) { | |
2101 | zlog_err("%u: Failed to %s prefix %s in VRF %s", | |
2102 | bgp_def->vrf_id, | |
2103 | install ? "install" : "uninstall", | |
2104 | prefix2str(evp, buf, sizeof(buf)), | |
2105 | vrf_id_to_name(bgp_vrf->vrf_id)); | |
2106 | return ret; | |
2107 | } | |
2108 | } | |
2109 | ||
2110 | return 0; | |
2111 | } | |
2112 | ||
128ea8ab | 2113 | /* |
2114 | * Install or uninstall route in matching VNIs (list). | |
2115 | */ | |
d62a17ae | 2116 | static int install_uninstall_route_in_vnis(struct bgp *bgp, afi_t afi, |
2117 | safi_t safi, struct prefix_evpn *evp, | |
2118 | struct bgp_info *ri, | |
2119 | struct list *vnis, int install) | |
128ea8ab | 2120 | { |
d62a17ae | 2121 | struct bgpevpn *vpn; |
2122 | struct listnode *node, *nnode; | |
128ea8ab | 2123 | |
d62a17ae | 2124 | for (ALL_LIST_ELEMENTS(vnis, node, nnode, vpn)) { |
2125 | int ret; | |
128ea8ab | 2126 | |
d62a17ae | 2127 | if (!is_vni_live(vpn)) |
2128 | continue; | |
128ea8ab | 2129 | |
d62a17ae | 2130 | if (install) |
2131 | ret = install_evpn_route_entry(bgp, vpn, evp, ri); | |
2132 | else | |
2133 | ret = uninstall_evpn_route_entry(bgp, vpn, evp, ri); | |
128ea8ab | 2134 | |
d62a17ae | 2135 | if (ret) { |
2136 | zlog_err("%u: Failed to %s EVPN %s route in VNI %u", | |
2137 | bgp->vrf_id, install ? "install" : "uninstall", | |
2138 | evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE | |
2139 | ? "MACIP" | |
2140 | : "IMET", | |
2141 | vpn->vni); | |
2142 | return ret; | |
2143 | } | |
2144 | } | |
128ea8ab | 2145 | |
d62a17ae | 2146 | return 0; |
128ea8ab | 2147 | } |
2148 | ||
2149 | /* | |
2150 | * Install or uninstall route for appropriate VNIs. | |
2151 | */ | |
d62a17ae | 2152 | static int install_uninstall_evpn_route(struct bgp *bgp, afi_t afi, safi_t safi, |
2153 | struct prefix *p, struct bgp_info *ri, | |
2154 | int import) | |
2155 | { | |
2156 | struct prefix_evpn *evp = (struct prefix_evpn *)p; | |
2157 | struct attr *attr = ri->attr; | |
2158 | struct ecommunity *ecom; | |
2159 | int i; | |
2160 | ||
2161 | assert(attr); | |
2162 | ||
2163 | /* Only type-2 and type-3 routes go into a L2 VNI. */ | |
2164 | if (!(evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE | |
2165 | || evp->prefix.route_type == BGP_EVPN_IMET_ROUTE)) | |
2166 | return 0; | |
2167 | ||
2168 | /* If we don't have Route Target, nothing much to do. */ | |
2169 | if (!(attr->flag & ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES))) | |
2170 | return 0; | |
2171 | ||
2172 | ecom = attr->ecommunity; | |
2173 | if (!ecom || !ecom->size) | |
2174 | return -1; | |
2175 | ||
2176 | /* For each extended community RT, see which VNIs match and import | |
2177 | * the route into matching VNIs. | |
2178 | */ | |
2179 | for (i = 0; i < ecom->size; i++) { | |
2180 | u_char *pnt; | |
2181 | u_char type, sub_type; | |
2182 | struct ecommunity_val *eval; | |
2183 | struct ecommunity_val eval_tmp; | |
d3135ba3 | 2184 | struct irt_node *irt; /* import rt for l2vni */ |
2185 | struct vrf_irt_node *vrf_irt; /* import rt for l3vni */ | |
d62a17ae | 2186 | |
2187 | /* Only deal with RTs */ | |
2188 | pnt = (ecom->val + (i * ECOMMUNITY_SIZE)); | |
2189 | eval = (struct ecommunity_val *)(ecom->val | |
2190 | + (i * ECOMMUNITY_SIZE)); | |
2191 | type = *pnt++; | |
2192 | sub_type = *pnt++; | |
2193 | if (sub_type != ECOMMUNITY_ROUTE_TARGET) | |
2194 | continue; | |
2195 | ||
d3135ba3 | 2196 | /* Import route into matching l2-vnis */ |
d62a17ae | 2197 | irt = lookup_import_rt(bgp, eval); |
2198 | if (irt && irt->vnis) | |
2199 | install_uninstall_route_in_vnis(bgp, afi, safi, evp, ri, | |
2200 | irt->vnis, import); | |
2201 | ||
d3135ba3 | 2202 | /* Import route into matching l3-vnis (vrfs) */ |
2203 | vrf_irt = lookup_vrf_import_rt(eval); | |
2204 | if (vrf_irt && vrf_irt->vrfs) | |
2205 | install_uninstall_route_in_vrfs(bgp, afi, safi, evp, ri, | |
2206 | vrf_irt->vrfs, import); | |
2207 | ||
d62a17ae | 2208 | /* Also check for non-exact match. In this, we mask out the AS |
2209 | * and | |
2210 | * only check on the local-admin sub-field. This is to | |
2211 | * facilitate using | |
2212 | * VNI as the RT for EBGP peering too. | |
2213 | */ | |
2214 | irt = NULL; | |
d3135ba3 | 2215 | vrf_irt = NULL; |
d62a17ae | 2216 | if (type == ECOMMUNITY_ENCODE_AS |
2217 | || type == ECOMMUNITY_ENCODE_AS4 | |
2218 | || type == ECOMMUNITY_ENCODE_IP) { | |
2219 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
2220 | mask_ecom_global_admin(&eval_tmp, eval); | |
2221 | irt = lookup_import_rt(bgp, &eval_tmp); | |
d3135ba3 | 2222 | vrf_irt = lookup_vrf_import_rt(&eval_tmp); |
d62a17ae | 2223 | } |
2224 | if (irt && irt->vnis) | |
2225 | install_uninstall_route_in_vnis(bgp, afi, safi, evp, ri, | |
2226 | irt->vnis, import); | |
d3135ba3 | 2227 | if (vrf_irt && vrf_irt->vrfs) |
2228 | install_uninstall_route_in_vrfs(bgp, afi, safi, evp, | |
2229 | ri, vrf_irt->vrfs, | |
2230 | import); | |
d62a17ae | 2231 | } |
2232 | ||
2233 | return 0; | |
128ea8ab | 2234 | } |
2235 | ||
90e60aa7 | 2236 | /* |
2237 | * Update and advertise local routes for a VNI. Invoked upon router-id | |
2238 | * change. Note that the processing is done only on the global route table | |
2239 | * using routes that already exist in the per-VNI table. | |
2240 | */ | |
d62a17ae | 2241 | static int update_advertise_vni_routes(struct bgp *bgp, struct bgpevpn *vpn) |
2242 | { | |
2243 | struct prefix_evpn p; | |
2244 | struct bgp_node *rn, *global_rn; | |
2245 | struct bgp_info *ri, *global_ri; | |
2246 | struct attr *attr; | |
2247 | afi_t afi = AFI_L2VPN; | |
2248 | safi_t safi = SAFI_EVPN; | |
2249 | ||
2250 | /* Locate type-3 route for VNI in the per-VNI table and use its | |
2251 | * attributes to create and advertise the type-3 route for this VNI | |
2252 | * in the global table. | |
2253 | */ | |
2254 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
2255 | rn = bgp_node_lookup(vpn->route_table, (struct prefix *)&p); | |
2256 | if (!rn) /* unexpected */ | |
2257 | return 0; | |
2258 | for (ri = rn->info; ri; ri = ri->next) | |
2259 | if (ri->peer == bgp->peer_self && ri->type == ZEBRA_ROUTE_BGP | |
2260 | && ri->sub_type == BGP_ROUTE_STATIC) | |
2261 | break; | |
2262 | if (!ri) /* unexpected */ | |
2263 | return 0; | |
2264 | attr = ri->attr; | |
2265 | ||
2266 | global_rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, | |
2267 | (struct prefix *)&p, &vpn->prd); | |
1a98c087 MK |
2268 | update_evpn_route_entry(bgp, vpn, afi, safi, global_rn, attr, 1, 0, &ri, |
2269 | 0); | |
d62a17ae | 2270 | |
2271 | /* Schedule for processing and unlock node. */ | |
2272 | bgp_process(bgp, global_rn, afi, safi); | |
2273 | bgp_unlock_node(global_rn); | |
2274 | ||
2275 | /* Now, walk this VNI's route table and use the route and its attribute | |
2276 | * to create and schedule route in global table. | |
2277 | */ | |
2278 | for (rn = bgp_table_top(vpn->route_table); rn; | |
2279 | rn = bgp_route_next(rn)) { | |
2280 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
2281 | ||
2282 | /* Identify MAC-IP local routes. */ | |
2283 | if (evp->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE) | |
2284 | continue; | |
2285 | ||
2286 | for (ri = rn->info; ri; ri = ri->next) | |
2287 | if (ri->peer == bgp->peer_self | |
2288 | && ri->type == ZEBRA_ROUTE_BGP | |
2289 | && ri->sub_type == BGP_ROUTE_STATIC) | |
2290 | break; | |
2291 | if (!ri) | |
2292 | continue; | |
2293 | ||
2294 | /* Create route in global routing table using this route entry's | |
2295 | * attribute. | |
2296 | */ | |
2297 | attr = ri->attr; | |
2298 | global_rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, | |
2299 | (struct prefix *)evp, &vpn->prd); | |
2300 | assert(global_rn); | |
2301 | update_evpn_route_entry(bgp, vpn, afi, safi, global_rn, attr, 1, | |
1a98c087 | 2302 | 0, &global_ri, 0); |
d62a17ae | 2303 | |
2304 | /* Schedule for processing and unlock node. */ | |
2305 | bgp_process(bgp, global_rn, afi, safi); | |
2306 | bgp_unlock_node(global_rn); | |
2307 | } | |
2308 | ||
2309 | return 0; | |
90e60aa7 | 2310 | } |
2311 | ||
2312 | /* | |
2313 | * Delete (and withdraw) local routes for a VNI - only from the global | |
2314 | * table. Invoked upon router-id change. | |
2315 | */ | |
d62a17ae | 2316 | static int delete_withdraw_vni_routes(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 2317 | { |
d62a17ae | 2318 | int ret; |
2319 | struct prefix_evpn p; | |
2320 | struct bgp_node *global_rn; | |
2321 | struct bgp_info *ri; | |
2322 | afi_t afi = AFI_L2VPN; | |
2323 | safi_t safi = SAFI_EVPN; | |
90e60aa7 | 2324 | |
d62a17ae | 2325 | /* Delete and withdraw locally learnt type-2 routes (MACIP) |
2326 | * for this VNI - from the global table. | |
2327 | */ | |
2328 | ret = delete_global_type2_routes(bgp, vpn); | |
2329 | if (ret) | |
2330 | return ret; | |
90e60aa7 | 2331 | |
d62a17ae | 2332 | /* Remove type-3 route for this VNI from global table. */ |
2333 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
2334 | global_rn = bgp_afi_node_lookup(bgp->rib[afi][safi], afi, safi, | |
2335 | (struct prefix *)&p, &vpn->prd); | |
2336 | if (global_rn) { | |
2337 | /* Delete route entry in the global EVPN table. */ | |
2338 | delete_evpn_route_entry(bgp, vpn, afi, safi, global_rn, &ri); | |
90e60aa7 | 2339 | |
d62a17ae | 2340 | /* Schedule for processing - withdraws to peers happen from |
2341 | * this table. | |
2342 | */ | |
2343 | if (ri) | |
2344 | bgp_process(bgp, global_rn, afi, safi); | |
2345 | bgp_unlock_node(global_rn); | |
2346 | } | |
90e60aa7 | 2347 | |
d62a17ae | 2348 | return 0; |
90e60aa7 | 2349 | } |
2350 | ||
2d48ee25 | 2351 | /* |
2352 | * Handle router-id change. Update and advertise local routes corresponding | |
2353 | * to this VNI from peers. Note that this is invoked after updating the | |
2354 | * router-id. The routes in the per-VNI table are used to create routes in | |
2355 | * the global table and schedule them. | |
2356 | */ | |
d62a17ae | 2357 | static void update_router_id_vni(struct hash_backet *backet, struct bgp *bgp) |
2d48ee25 | 2358 | { |
d62a17ae | 2359 | struct bgpevpn *vpn; |
2d48ee25 | 2360 | |
d62a17ae | 2361 | vpn = (struct bgpevpn *)backet->data; |
2d48ee25 | 2362 | |
d62a17ae | 2363 | if (!vpn) { |
2364 | zlog_warn("%s: VNI hash entry for VNI not found", __FUNCTION__); | |
2365 | return; | |
2366 | } | |
2d48ee25 | 2367 | |
d62a17ae | 2368 | /* Skip VNIs with configured RD. */ |
2369 | if (is_rd_configured(vpn)) | |
2370 | return; | |
2d48ee25 | 2371 | |
d62a17ae | 2372 | bgp_evpn_derive_auto_rd(bgp, vpn); |
2373 | update_advertise_vni_routes(bgp, vpn); | |
2d48ee25 | 2374 | } |
2375 | ||
2376 | /* | |
2377 | * Handle router-id change. Delete and withdraw local routes corresponding | |
2378 | * to this VNI from peers. Note that this is invoked prior to updating | |
2379 | * the router-id and is done only on the global route table, the routes | |
2380 | * are needed in the per-VNI table to re-advertise with new router id. | |
2381 | */ | |
d62a17ae | 2382 | static void withdraw_router_id_vni(struct hash_backet *backet, struct bgp *bgp) |
2d48ee25 | 2383 | { |
d62a17ae | 2384 | struct bgpevpn *vpn; |
2d48ee25 | 2385 | |
d62a17ae | 2386 | vpn = (struct bgpevpn *)backet->data; |
2d48ee25 | 2387 | |
d62a17ae | 2388 | if (!vpn) { |
2389 | zlog_warn("%s: VNI hash entry for VNI not found", __FUNCTION__); | |
2390 | return; | |
2391 | } | |
2d48ee25 | 2392 | |
d62a17ae | 2393 | /* Skip VNIs with configured RD. */ |
2394 | if (is_rd_configured(vpn)) | |
2395 | return; | |
2d48ee25 | 2396 | |
d62a17ae | 2397 | delete_withdraw_vni_routes(bgp, vpn); |
2d48ee25 | 2398 | } |
2399 | ||
128ea8ab | 2400 | /* |
2401 | * Process received EVPN type-2 route (advertise or withdraw). | |
2402 | */ | |
d62a17ae | 2403 | static int process_type2_route(struct peer *peer, afi_t afi, safi_t safi, |
2404 | struct attr *attr, u_char *pfx, int psize, | |
2405 | u_int32_t addpath_id) | |
2406 | { | |
2407 | struct prefix_rd prd; | |
2408 | struct prefix_evpn p; | |
2409 | u_char ipaddr_len; | |
2410 | u_char macaddr_len; | |
2411 | mpls_label_t *label_pnt; | |
2412 | int ret; | |
2413 | ||
2414 | /* Type-2 route should be either 33, 37 or 49 bytes or an | |
2415 | * additional 3 bytes if there is a second label (VNI): | |
2416 | * RD (8), ESI (10), Eth Tag (4), MAC Addr Len (1), | |
2417 | * MAC Addr (6), IP len (1), IP (0, 4 or 16), | |
2418 | * MPLS Lbl1 (3), MPLS Lbl2 (0 or 3) | |
2419 | */ | |
2420 | if (psize != 33 && psize != 37 && psize != 49 && psize != 36 | |
2421 | && psize != 40 && psize != 52) { | |
2422 | zlog_err("%u:%s - Rx EVPN Type-2 NLRI with invalid length %d", | |
2423 | peer->bgp->vrf_id, peer->host, psize); | |
2424 | return -1; | |
2425 | } | |
2426 | ||
2427 | /* Make prefix_rd */ | |
2428 | prd.family = AF_UNSPEC; | |
2429 | prd.prefixlen = 64; | |
2430 | memcpy(&prd.val, pfx, 8); | |
2431 | pfx += 8; | |
2432 | ||
2433 | /* Make EVPN prefix. */ | |
2434 | memset(&p, 0, sizeof(struct prefix_evpn)); | |
b03b8898 | 2435 | p.family = AF_EVPN; |
d62a17ae | 2436 | p.prefixlen = EVPN_TYPE_2_ROUTE_PREFIXLEN; |
2437 | p.prefix.route_type = BGP_EVPN_MAC_IP_ROUTE; | |
2438 | ||
2439 | /* Skip over Ethernet Seg Identifier for now. */ | |
2440 | pfx += 10; | |
2441 | ||
2442 | /* Skip over Ethernet Tag for now. */ | |
2443 | pfx += 4; | |
2444 | ||
2445 | /* Get the MAC Addr len */ | |
2446 | macaddr_len = *pfx++; | |
2447 | ||
2448 | /* Get the MAC Addr */ | |
28328ea9 DS |
2449 | if (macaddr_len == (ETH_ALEN * 8)) { |
2450 | memcpy(&p.prefix.mac.octet, pfx, ETH_ALEN); | |
2451 | pfx += ETH_ALEN; | |
d62a17ae | 2452 | } else { |
2453 | zlog_err( | |
2454 | "%u:%s - Rx EVPN Type-2 NLRI with unsupported MAC address length %d", | |
2455 | peer->bgp->vrf_id, peer->host, macaddr_len); | |
2456 | return -1; | |
2457 | } | |
2458 | ||
2459 | ||
2460 | /* Get the IP. */ | |
2461 | ipaddr_len = *pfx++; | |
2462 | if (ipaddr_len != 0 && ipaddr_len != IPV4_MAX_BITLEN | |
2463 | && ipaddr_len != IPV6_MAX_BITLEN) { | |
2464 | zlog_err( | |
2465 | "%u:%s - Rx EVPN Type-2 NLRI with unsupported IP address length %d", | |
2466 | peer->bgp->vrf_id, peer->host, ipaddr_len); | |
2467 | return -1; | |
2468 | } | |
2469 | ||
2470 | if (ipaddr_len) { | |
2471 | ipaddr_len /= 8; /* Convert to bytes. */ | |
2472 | p.prefix.ip.ipa_type = (ipaddr_len == IPV4_MAX_BYTELEN) | |
2473 | ? IPADDR_V4 | |
2474 | : IPADDR_V6; | |
2475 | memcpy(&p.prefix.ip.ip.addr, pfx, ipaddr_len); | |
2476 | } | |
2477 | pfx += ipaddr_len; | |
2478 | ||
2479 | /* Get the VNI (in MPLS label field). */ | |
2480 | /* Note: We ignore the second VNI, if any. */ | |
2481 | label_pnt = (mpls_label_t *)pfx; | |
2482 | ||
2483 | /* Process the route. */ | |
2484 | if (attr) | |
2485 | ret = bgp_update(peer, (struct prefix *)&p, addpath_id, attr, | |
2486 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
2487 | &prd, label_pnt, 0, NULL); | |
2488 | else | |
2489 | ret = bgp_withdraw(peer, (struct prefix *)&p, addpath_id, attr, | |
2490 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
2491 | &prd, label_pnt, NULL); | |
2492 | return ret; | |
128ea8ab | 2493 | } |
2494 | ||
2495 | /* | |
2496 | * Process received EVPN type-3 route (advertise or withdraw). | |
2497 | */ | |
d62a17ae | 2498 | static int process_type3_route(struct peer *peer, afi_t afi, safi_t safi, |
2499 | struct attr *attr, u_char *pfx, int psize, | |
2500 | u_int32_t addpath_id) | |
2501 | { | |
2502 | struct prefix_rd prd; | |
2503 | struct prefix_evpn p; | |
2504 | u_char ipaddr_len; | |
2505 | int ret; | |
2506 | ||
2507 | /* Type-3 route should be either 17 or 29 bytes: RD (8), Eth Tag (4), | |
2508 | * IP len (1) and IP (4 or 16). | |
2509 | */ | |
2510 | if (psize != 17 && psize != 29) { | |
2511 | zlog_err("%u:%s - Rx EVPN Type-3 NLRI with invalid length %d", | |
2512 | peer->bgp->vrf_id, peer->host, psize); | |
2513 | return -1; | |
2514 | } | |
2515 | ||
2516 | /* Make prefix_rd */ | |
2517 | prd.family = AF_UNSPEC; | |
2518 | prd.prefixlen = 64; | |
2519 | memcpy(&prd.val, pfx, 8); | |
2520 | pfx += 8; | |
2521 | ||
2522 | /* Make EVPN prefix. */ | |
2523 | memset(&p, 0, sizeof(struct prefix_evpn)); | |
b03b8898 | 2524 | p.family = AF_EVPN; |
d62a17ae | 2525 | p.prefixlen = EVPN_TYPE_3_ROUTE_PREFIXLEN; |
2526 | p.prefix.route_type = BGP_EVPN_IMET_ROUTE; | |
2527 | ||
2528 | /* Skip over Ethernet Tag for now. */ | |
2529 | pfx += 4; | |
2530 | ||
2531 | /* Get the IP. */ | |
2532 | ipaddr_len = *pfx++; | |
2533 | if (ipaddr_len == IPV4_MAX_BITLEN) { | |
2534 | p.prefix.ip.ipa_type = IPADDR_V4; | |
2535 | memcpy(&p.prefix.ip.ip.addr, pfx, IPV4_MAX_BYTELEN); | |
2536 | } else { | |
2537 | zlog_err( | |
2538 | "%u:%s - Rx EVPN Type-3 NLRI with unsupported IP address length %d", | |
2539 | peer->bgp->vrf_id, peer->host, ipaddr_len); | |
2540 | return -1; | |
2541 | } | |
2542 | ||
2543 | /* Process the route. */ | |
2544 | if (attr) | |
2545 | ret = bgp_update(peer, (struct prefix *)&p, addpath_id, attr, | |
2546 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
2547 | &prd, NULL, 0, NULL); | |
2548 | else | |
2549 | ret = bgp_withdraw(peer, (struct prefix *)&p, addpath_id, attr, | |
2550 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
2551 | &prd, NULL, NULL); | |
2552 | return ret; | |
128ea8ab | 2553 | } |
2554 | ||
2555 | /* | |
2556 | * Process received EVPN type-5 route (advertise or withdraw). | |
2557 | */ | |
d62a17ae | 2558 | static int process_type5_route(struct peer *peer, afi_t afi, safi_t safi, |
2559 | struct attr *attr, u_char *pfx, int psize, | |
2560 | u_int32_t addpath_id, int withdraw) | |
2561 | { | |
2562 | struct prefix_rd prd; | |
2563 | struct prefix_evpn p; | |
2564 | struct bgp_route_evpn evpn; | |
2565 | u_char ippfx_len; | |
2566 | u_int32_t eth_tag; | |
2567 | mpls_label_t *label_pnt; | |
2568 | int ret; | |
2569 | ||
2570 | /* Type-5 route should be 34 or 58 bytes: | |
2571 | * RD (8), ESI (10), Eth Tag (4), IP len (1), IP (4 or 16), | |
2572 | * GW (4 or 16) and VNI (3). | |
2573 | * Note that the IP and GW should both be IPv4 or both IPv6. | |
2574 | */ | |
2575 | if (psize != 34 && psize != 58) { | |
2576 | zlog_err("%u:%s - Rx EVPN Type-5 NLRI with invalid length %d", | |
2577 | peer->bgp->vrf_id, peer->host, psize); | |
2578 | return -1; | |
2579 | } | |
2580 | ||
2581 | /* Make prefix_rd */ | |
2582 | prd.family = AF_UNSPEC; | |
2583 | prd.prefixlen = 64; | |
2584 | memcpy(&prd.val, pfx, 8); | |
2585 | pfx += 8; | |
2586 | ||
2587 | /* Make EVPN prefix. */ | |
2588 | memset(&p, 0, sizeof(struct prefix_evpn)); | |
b03b8898 | 2589 | p.family = AF_EVPN; |
d62a17ae | 2590 | p.prefix.route_type = BGP_EVPN_IP_PREFIX_ROUTE; |
2591 | ||
2592 | /* Additional information outside of prefix - ESI and GW IP */ | |
2593 | memset(&evpn, 0, sizeof(evpn)); | |
2594 | ||
2595 | /* Fetch ESI */ | |
2596 | memcpy(&evpn.eth_s_id.val, pfx, 10); | |
2597 | pfx += 10; | |
2598 | ||
2599 | /* Fetch Ethernet Tag. */ | |
2600 | memcpy(ð_tag, pfx, 4); | |
2601 | p.prefix.eth_tag = ntohl(eth_tag); | |
2602 | pfx += 4; | |
2603 | ||
2604 | /* Fetch IP prefix length. */ | |
2605 | ippfx_len = *pfx++; | |
2606 | if (ippfx_len > IPV6_MAX_BITLEN) { | |
2607 | zlog_err( | |
2608 | "%u:%s - Rx EVPN Type-5 NLRI with invalid IP Prefix length %d", | |
2609 | peer->bgp->vrf_id, peer->host, ippfx_len); | |
2610 | return -1; | |
2611 | } | |
2612 | p.prefix.ip_prefix_length = ippfx_len; | |
2613 | ||
2614 | /* Determine IPv4 or IPv6 prefix */ | |
2615 | /* Since the address and GW are from the same family, this just becomes | |
2616 | * a simple check on the total size. | |
2617 | */ | |
2618 | if (psize == 34) { | |
2619 | SET_IPADDR_V4(&p.prefix.ip); | |
2620 | memcpy(&p.prefix.ip.ipaddr_v4, pfx, 4); | |
2621 | pfx += 4; | |
2622 | memcpy(&evpn.gw_ip.ipv4, pfx, 4); | |
2623 | pfx += 4; | |
2624 | p.prefixlen = PREFIX_LEN_ROUTE_TYPE_5_IPV4; | |
2625 | } else { | |
2626 | SET_IPADDR_V6(&p.prefix.ip); | |
2627 | memcpy(&p.prefix.ip.ipaddr_v6, pfx, 16); | |
2628 | pfx += 16; | |
2629 | memcpy(&evpn.gw_ip.ipv6, pfx, 16); | |
2630 | pfx += 16; | |
2631 | p.prefixlen = PREFIX_LEN_ROUTE_TYPE_5_IPV6; | |
2632 | } | |
2633 | ||
2634 | label_pnt = (mpls_label_t *)pfx; | |
2635 | ||
2636 | /* Process the route. */ | |
2637 | if (!withdraw) | |
2638 | ret = bgp_update(peer, (struct prefix *)&p, addpath_id, attr, | |
2639 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
2640 | &prd, label_pnt, 0, &evpn); | |
2641 | else | |
2642 | ret = bgp_withdraw(peer, (struct prefix *)&p, addpath_id, attr, | |
2643 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
2644 | &prd, label_pnt, &evpn); | |
2645 | ||
2646 | return ret; | |
2647 | } | |
2648 | ||
2649 | static void evpn_mpattr_encode_type5(struct stream *s, struct prefix *p, | |
2650 | struct prefix_rd *prd, mpls_label_t *label, | |
2651 | struct attr *attr) | |
2652 | { | |
2653 | int len; | |
2654 | char temp[16]; | |
2655 | struct evpn_addr *p_evpn_p; | |
2656 | ||
2657 | memset(&temp, 0, 16); | |
b03b8898 | 2658 | if (p->family != AF_EVPN) |
d62a17ae | 2659 | return; |
2660 | p_evpn_p = &(p->u.prefix_evpn); | |
2661 | ||
2662 | if (IS_IPADDR_V4(&p_evpn_p->ip)) | |
2663 | len = 8; /* ipv4 */ | |
2664 | else | |
2665 | len = 32; /* ipv6 */ | |
d62a17ae | 2666 | /* Prefix contains RD, ESI, EthTag, IP length, IP, GWIP and VNI */ |
2667 | stream_putc(s, 8 + 10 + 4 + 1 + len + 3); | |
2668 | stream_put(s, prd->val, 8); | |
0af35d90 | 2669 | if (attr) |
d62a17ae | 2670 | stream_put(s, &(attr->evpn_overlay.eth_s_id), 10); |
2671 | else | |
2672 | stream_put(s, &temp, 10); | |
2673 | stream_putl(s, p_evpn_p->eth_tag); | |
2674 | stream_putc(s, p_evpn_p->ip_prefix_length); | |
2675 | if (IS_IPADDR_V4(&p_evpn_p->ip)) | |
2676 | stream_put_ipv4(s, p_evpn_p->ip.ipaddr_v4.s_addr); | |
2677 | else | |
2678 | stream_put(s, &p_evpn_p->ip.ipaddr_v6, 16); | |
0af35d90 | 2679 | if (attr) { |
d62a17ae | 2680 | if (IS_IPADDR_V4(&p_evpn_p->ip)) |
2681 | stream_put_ipv4(s, | |
2682 | attr->evpn_overlay.gw_ip.ipv4.s_addr); | |
2683 | else | |
2684 | stream_put(s, &(attr->evpn_overlay.gw_ip.ipv6), 16); | |
2685 | } else { | |
2686 | if (IS_IPADDR_V4(&p_evpn_p->ip)) | |
2687 | stream_put_ipv4(s, 0); | |
2688 | else | |
2689 | stream_put(s, &temp, 16); | |
2690 | } | |
2691 | ||
2692 | if (label) | |
2693 | stream_put(s, label, 3); | |
2694 | else | |
2695 | stream_put3(s, 0); | |
128ea8ab | 2696 | } |
2697 | ||
2698 | /* | |
2699 | * Cleanup specific VNI upon EVPN (advertise-all-vni) being disabled. | |
2700 | */ | |
d62a17ae | 2701 | static void cleanup_vni_on_disable(struct hash_backet *backet, struct bgp *bgp) |
128ea8ab | 2702 | { |
d62a17ae | 2703 | struct bgpevpn *vpn = (struct bgpevpn *)backet->data; |
128ea8ab | 2704 | |
d62a17ae | 2705 | /* Remove EVPN routes and schedule for processing. */ |
2706 | delete_routes_for_vni(bgp, vpn); | |
128ea8ab | 2707 | |
d62a17ae | 2708 | /* Clear "live" flag and see if hash needs to be freed. */ |
2709 | UNSET_FLAG(vpn->flags, VNI_FLAG_LIVE); | |
2710 | if (!is_vni_configured(vpn)) | |
2711 | bgp_evpn_free(bgp, vpn); | |
128ea8ab | 2712 | } |
2713 | ||
2714 | /* | |
2715 | * Free a VNI entry; iterator function called during cleanup. | |
2716 | */ | |
d62a17ae | 2717 | static void free_vni_entry(struct hash_backet *backet, struct bgp *bgp) |
128ea8ab | 2718 | { |
d62a17ae | 2719 | struct bgpevpn *vpn; |
128ea8ab | 2720 | |
d62a17ae | 2721 | vpn = (struct bgpevpn *)backet->data; |
2722 | delete_all_vni_routes(bgp, vpn); | |
2723 | bgp_evpn_free(bgp, vpn); | |
128ea8ab | 2724 | } |
2725 | ||
c581d8b0 MK |
2726 | /* |
2727 | * Derive AUTO import RT for BGP VRF - L3VNI | |
2728 | */ | |
2729 | static void evpn_auto_rt_import_add_for_vrf(struct bgp *bgp_vrf) | |
2730 | { | |
10ebe1ab MK |
2731 | struct bgp *bgp_def = NULL; |
2732 | ||
c581d8b0 | 2733 | form_auto_rt(bgp_vrf, bgp_vrf->l3vni, bgp_vrf->vrf_import_rtl); |
10ebe1ab MK |
2734 | UNSET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_IMPORT_RT_CFGD); |
2735 | ||
2736 | /* Map RT to VRF */ | |
2737 | bgp_def = bgp_get_default(); | |
2738 | if (!bgp_def) | |
2739 | return; | |
2740 | bgp_evpn_map_vrf_to_its_rts(bgp_vrf); | |
c581d8b0 MK |
2741 | } |
2742 | ||
2743 | /* | |
2744 | * Delete AUTO import RT from BGP VRF - L3VNI | |
2745 | */ | |
2746 | static void evpn_auto_rt_import_delete_for_vrf(struct bgp *bgp_vrf) | |
2747 | { | |
2748 | evpn_rt_delete_auto(bgp_vrf, bgp_vrf->l3vni, bgp_vrf->vrf_import_rtl); | |
2749 | } | |
2750 | ||
2751 | /* | |
2752 | * Derive AUTO export RT for BGP VRF - L3VNI | |
2753 | */ | |
2754 | static void evpn_auto_rt_export_add_for_vrf(struct bgp *bgp_vrf) | |
2755 | { | |
2756 | UNSET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_EXPORT_RT_CFGD); | |
2757 | form_auto_rt(bgp_vrf, bgp_vrf->l3vni, bgp_vrf->vrf_export_rtl); | |
2758 | } | |
2759 | ||
2760 | /* | |
2761 | * Delete AUTO export RT from BGP VRF - L3VNI | |
2762 | */ | |
2763 | static void evpn_auto_rt_export_delete_for_vrf(struct bgp *bgp_vrf) | |
2764 | { | |
2765 | evpn_rt_delete_auto(bgp_vrf, bgp_vrf->l3vni, bgp_vrf->vrf_export_rtl); | |
2766 | } | |
128ea8ab | 2767 | |
f1f8b53c MK |
2768 | static void bgp_evpn_handle_export_rt_change_for_vrf(struct bgp *bgp_vrf) |
2769 | { | |
2770 | struct bgp *bgp_def = NULL; | |
2771 | struct listnode *node = NULL; | |
2772 | struct bgpevpn *vpn = NULL; | |
2773 | ||
2774 | bgp_def = bgp_get_default(); | |
2775 | if (!bgp_def) | |
2776 | return; | |
2777 | ||
2778 | for (ALL_LIST_ELEMENTS_RO(bgp_vrf->l2vnis, node, vpn)) | |
2779 | update_routes_for_vni(bgp_def, vpn); | |
2780 | } | |
2781 | ||
128ea8ab | 2782 | /* |
2783 | * Public functions. | |
2784 | */ | |
2785 | ||
c581d8b0 MK |
2786 | void evpn_rt_delete_auto(struct bgp *bgp, vni_t vni, |
2787 | struct list *rtl) | |
2788 | { | |
2789 | struct listnode *node, *nnode, *node_to_del; | |
2790 | struct ecommunity *ecom, *ecom_auto; | |
2791 | struct ecommunity_val eval; | |
2792 | ||
2793 | encode_route_target_as((bgp->as & 0xFFFF), vni, &eval); | |
2794 | ||
2795 | ecom_auto = ecommunity_new(); | |
2796 | ecommunity_add_val(ecom_auto, &eval); | |
2797 | node_to_del = NULL; | |
2798 | ||
2799 | for (ALL_LIST_ELEMENTS(rtl, node, nnode, ecom)) { | |
2800 | if (ecommunity_match(ecom, ecom_auto)) { | |
2801 | ecommunity_free(&ecom); | |
2802 | node_to_del = node; | |
2803 | } | |
2804 | } | |
2805 | ||
2806 | if (node_to_del) | |
2807 | list_delete_node(rtl, node_to_del); | |
2808 | ||
2809 | ecommunity_free(&ecom_auto); | |
2810 | } | |
2811 | ||
2812 | void bgp_evpn_configure_import_rt_for_vrf(struct bgp *bgp_vrf, | |
10ebe1ab | 2813 | struct ecommunity *ecomadd) |
c581d8b0 | 2814 | { |
5ba238b7 MK |
2815 | /* uninstall routes from vrf */ |
2816 | uninstall_routes_for_vrf(bgp_vrf); | |
10ebe1ab MK |
2817 | |
2818 | /* Cleanup the RT to VRF mapping */ | |
2819 | bgp_evpn_unmap_vrf_from_its_rts(bgp_vrf); | |
2820 | ||
c581d8b0 MK |
2821 | /* Remove auto generated RT */ |
2822 | evpn_auto_rt_import_delete_for_vrf(bgp_vrf); | |
2823 | ||
2824 | /* Add the newly configured RT to RT list */ | |
2825 | listnode_add_sort(bgp_vrf->vrf_import_rtl, ecomadd); | |
2826 | SET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_IMPORT_RT_CFGD); | |
2827 | ||
10ebe1ab MK |
2828 | /* map VRF to its RTs */ |
2829 | bgp_evpn_map_vrf_to_its_rts(bgp_vrf); | |
2830 | ||
5ba238b7 MK |
2831 | /* install routes matching the new VRF */ |
2832 | install_routes_for_vrf(bgp_vrf); | |
c581d8b0 MK |
2833 | } |
2834 | ||
2835 | void bgp_evpn_unconfigure_import_rt_for_vrf(struct bgp *bgp_vrf, | |
2836 | struct ecommunity *ecomdel) | |
2837 | { | |
2838 | struct listnode *node = NULL, *nnode = NULL, *node_to_del = NULL; | |
2839 | struct ecommunity *ecom = NULL; | |
2840 | ||
5ba238b7 MK |
2841 | /* uninstall routes from vrf */ |
2842 | uninstall_routes_for_vrf(bgp_vrf); | |
10ebe1ab MK |
2843 | |
2844 | /* Cleanup the RT to VRF mapping */ | |
2845 | bgp_evpn_unmap_vrf_from_its_rts(bgp_vrf); | |
2846 | ||
c581d8b0 MK |
2847 | /* remove the RT from the RT list */ |
2848 | for (ALL_LIST_ELEMENTS(bgp_vrf->vrf_import_rtl, node, nnode, ecom)) { | |
2849 | if (ecommunity_match(ecom, ecomdel)) { | |
2850 | ecommunity_free(&ecom); | |
2851 | node_to_del = node; | |
2852 | break; | |
2853 | } | |
2854 | } | |
2855 | ||
2856 | if (node_to_del) | |
2857 | list_delete_node(bgp_vrf->vrf_import_rtl, node_to_del); | |
2858 | ||
2859 | /* fallback to auto import rt, if this was the last RT */ | |
2860 | if (list_isempty(bgp_vrf->vrf_import_rtl)) { | |
2861 | UNSET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_IMPORT_RT_CFGD); | |
2862 | evpn_auto_rt_import_add_for_vrf(bgp_vrf); | |
2863 | } | |
2864 | ||
10ebe1ab MK |
2865 | /* map VRFs to its RTs */ |
2866 | bgp_evpn_map_vrf_to_its_rts(bgp_vrf); | |
2867 | ||
5ba238b7 MK |
2868 | /* install routes matching this new RT */ |
2869 | install_routes_for_vrf(bgp_vrf); | |
c581d8b0 MK |
2870 | } |
2871 | ||
2872 | void bgp_evpn_configure_export_rt_for_vrf(struct bgp *bgp_vrf, | |
2873 | struct ecommunity *ecomadd) | |
2874 | { | |
2875 | /* remove auto-generated RT */ | |
2876 | evpn_auto_rt_export_delete_for_vrf(bgp_vrf); | |
2877 | ||
2878 | /* Add the new RT to the RT list */ | |
2879 | listnode_add_sort(bgp_vrf->vrf_export_rtl, ecomadd); | |
2880 | SET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_EXPORT_RT_CFGD); | |
2881 | ||
f1f8b53c MK |
2882 | bgp_evpn_handle_export_rt_change_for_vrf(bgp_vrf); |
2883 | ||
c581d8b0 MK |
2884 | } |
2885 | ||
2886 | void bgp_evpn_unconfigure_export_rt_for_vrf(struct bgp *bgp_vrf, | |
2887 | struct ecommunity *ecomdel) | |
2888 | { | |
2889 | struct listnode *node = NULL, *nnode = NULL, *node_to_del = NULL; | |
2890 | struct ecommunity *ecom = NULL; | |
2891 | ||
2892 | /* Remove the RT from the RT list */ | |
2893 | for (ALL_LIST_ELEMENTS(bgp_vrf->vrf_export_rtl, node, nnode, ecom)) { | |
2894 | if (ecommunity_match(ecom, ecomdel)) { | |
2895 | ecommunity_free(&ecom); | |
2896 | node_to_del = node; | |
2897 | break; | |
2898 | } | |
2899 | } | |
2900 | ||
2901 | if (node_to_del) | |
2902 | list_delete_node(bgp_vrf->vrf_export_rtl, node_to_del); | |
2903 | ||
2904 | /* fall back to auto-generated RT if this was the last RT */ | |
2905 | if (list_isempty(bgp_vrf->vrf_export_rtl)) { | |
2906 | UNSET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_EXPORT_RT_CFGD); | |
2907 | evpn_auto_rt_export_add_for_vrf(bgp_vrf); | |
2908 | } | |
2909 | ||
f1f8b53c | 2910 | bgp_evpn_handle_export_rt_change_for_vrf(bgp_vrf); |
c581d8b0 MK |
2911 | } |
2912 | ||
2d48ee25 | 2913 | /* |
2914 | * Handle change to BGP router id. This is invoked twice by the change | |
2915 | * handler, first before the router id has been changed and then after | |
2916 | * the router id has been changed. The first invocation will result in | |
2917 | * local routes for all VNIs being deleted and withdrawn and the next | |
2918 | * will result in the routes being re-advertised. | |
2919 | */ | |
d62a17ae | 2920 | void bgp_evpn_handle_router_id_update(struct bgp *bgp, int withdraw) |
2d48ee25 | 2921 | { |
d62a17ae | 2922 | if (withdraw) |
2923 | hash_iterate(bgp->vnihash, | |
2924 | (void (*)(struct hash_backet *, | |
2925 | void *))withdraw_router_id_vni, | |
2926 | bgp); | |
2927 | else | |
2928 | hash_iterate(bgp->vnihash, | |
2929 | (void (*)(struct hash_backet *, | |
2930 | void *))update_router_id_vni, | |
2931 | bgp); | |
2d48ee25 | 2932 | } |
2933 | ||
90e60aa7 | 2934 | /* |
2935 | * Handle change to export RT - update and advertise local routes. | |
2936 | */ | |
d62a17ae | 2937 | int bgp_evpn_handle_export_rt_change(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 2938 | { |
d62a17ae | 2939 | return update_routes_for_vni(bgp, vpn); |
90e60aa7 | 2940 | } |
2941 | ||
2942 | /* | |
2943 | * Handle change to RD. This is invoked twice by the change handler, | |
2944 | * first before the RD has been changed and then after the RD has | |
2945 | * been changed. The first invocation will result in local routes | |
2946 | * of this VNI being deleted and withdrawn and the next will result | |
2947 | * in the routes being re-advertised. | |
2948 | */ | |
d62a17ae | 2949 | void bgp_evpn_handle_rd_change(struct bgp *bgp, struct bgpevpn *vpn, |
2950 | int withdraw) | |
90e60aa7 | 2951 | { |
d62a17ae | 2952 | if (withdraw) |
2953 | delete_withdraw_vni_routes(bgp, vpn); | |
2954 | else | |
2955 | update_advertise_vni_routes(bgp, vpn); | |
90e60aa7 | 2956 | } |
2957 | ||
2958 | /* | |
2959 | * Install routes for this VNI. Invoked upon change to Import RT. | |
2960 | */ | |
d62a17ae | 2961 | int bgp_evpn_install_routes(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 2962 | { |
d62a17ae | 2963 | return install_routes_for_vni(bgp, vpn); |
90e60aa7 | 2964 | } |
2965 | ||
2966 | /* | |
2967 | * Uninstall all routes installed for this VNI. Invoked upon change | |
2968 | * to Import RT. | |
2969 | */ | |
d62a17ae | 2970 | int bgp_evpn_uninstall_routes(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 2971 | { |
d62a17ae | 2972 | return uninstall_routes_for_vni(bgp, vpn); |
90e60aa7 | 2973 | } |
2974 | ||
b16031a2 | 2975 | /* |
2976 | * Function to display "tag" in route as a VNI. | |
2977 | */ | |
d62a17ae | 2978 | char *bgp_evpn_label2str(mpls_label_t *label, char *buf, int len) |
b16031a2 | 2979 | { |
d62a17ae | 2980 | vni_t vni; |
b16031a2 | 2981 | |
d62a17ae | 2982 | vni = label2vni(label); |
2983 | snprintf(buf, len, "%u", vni); | |
2984 | return buf; | |
b16031a2 | 2985 | } |
2986 | ||
9c92b5f7 MK |
2987 | /* |
2988 | * Function to convert evpn route to json format. | |
2989 | * NOTE: We don't use prefix2str as the output here is a bit different. | |
2990 | */ | |
57f7feb6 | 2991 | void bgp_evpn_route2json(struct prefix_evpn *p, json_object *json) |
9c92b5f7 | 2992 | { |
b682f6de | 2993 | char buf1[ETHER_ADDR_STRLEN]; |
2994 | char buf2[PREFIX2STR_BUFFER]; | |
9c92b5f7 | 2995 | |
b682f6de | 2996 | if (!json) |
2997 | return; | |
9c92b5f7 | 2998 | |
dff8f48d | 2999 | if (p->prefix.route_type == BGP_EVPN_IMET_ROUTE) { |
b682f6de | 3000 | json_object_int_add(json, "routeType", p->prefix.route_type); |
3001 | json_object_int_add(json, "ethTag", 0); | |
57f7feb6 MK |
3002 | json_object_int_add(json, "ipLen", |
3003 | IS_EVPN_PREFIX_IPADDR_V4(p) | |
3004 | ? IPV4_MAX_BITLEN | |
3005 | : IPV6_MAX_BITLEN); | |
b682f6de | 3006 | json_object_string_add(json, "ip", |
57f7feb6 MK |
3007 | inet_ntoa(p->prefix.ip.ipaddr_v4)); |
3008 | } else if (p->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) { | |
dff8f48d | 3009 | if (IS_EVPN_PREFIX_IPADDR_NONE(p)) { |
57f7feb6 MK |
3010 | json_object_int_add(json, "routeType", |
3011 | p->prefix.route_type); | |
3012 | json_object_int_add( | |
3013 | json, "esi", | |
3014 | 0); /* TODO: we don't support esi yet */ | |
3015 | json_object_int_add(json, "ethTag", 0); | |
3016 | json_object_int_add(json, "macLen", 8 * ETH_ALEN); | |
3017 | json_object_string_add(json, "mac", | |
3018 | prefix_mac2str(&p->prefix.mac, | |
3019 | buf1, | |
3020 | sizeof(buf1))); | |
dff8f48d MK |
3021 | } else { |
3022 | u_char family; | |
3023 | ||
57f7feb6 MK |
3024 | family = IS_EVPN_PREFIX_IPADDR_V4(p) ? AF_INET |
3025 | : AF_INET6; | |
dff8f48d | 3026 | |
b682f6de | 3027 | json_object_int_add(json, "routeType", |
57f7feb6 MK |
3028 | p->prefix.route_type); |
3029 | json_object_int_add( | |
3030 | json, "esi", | |
3031 | 0); /* TODO: we don't support esi yet */ | |
b682f6de | 3032 | json_object_int_add(json, "ethTag", 0); |
57f7feb6 | 3033 | json_object_int_add(json, "macLen", 8 * ETH_ALEN); |
b682f6de | 3034 | json_object_string_add(json, "mac", |
57f7feb6 MK |
3035 | prefix_mac2str(&p->prefix.mac, |
3036 | buf1, | |
3037 | sizeof(buf1))); | |
b682f6de | 3038 | json_object_int_add(json, "ipLen", |
57f7feb6 MK |
3039 | IS_EVPN_PREFIX_IPADDR_V4(p) |
3040 | ? IPV4_MAX_BITLEN | |
3041 | : IPV6_MAX_BITLEN); | |
3042 | json_object_string_add( | |
3043 | json, "ip", | |
3044 | inet_ntop(family, &p->prefix.ip.ip.addr, buf2, | |
3045 | PREFIX2STR_BUFFER)); | |
dff8f48d MK |
3046 | } |
3047 | } else { | |
3048 | /* Currently, this is to cater to other AF_ETHERNET code. */ | |
3049 | } | |
9c92b5f7 MK |
3050 | } |
3051 | ||
520d5d76 | 3052 | /* |
3053 | * Function to convert evpn route to string. | |
3054 | * NOTE: We don't use prefix2str as the output here is a bit different. | |
3055 | */ | |
d62a17ae | 3056 | char *bgp_evpn_route2str(struct prefix_evpn *p, char *buf, int len) |
3057 | { | |
3058 | char buf1[ETHER_ADDR_STRLEN]; | |
3059 | char buf2[PREFIX2STR_BUFFER]; | |
3060 | ||
3061 | if (p->prefix.route_type == BGP_EVPN_IMET_ROUTE) { | |
3062 | snprintf(buf, len, "[%d]:[0]:[%d]:[%s]", p->prefix.route_type, | |
3063 | IS_EVPN_PREFIX_IPADDR_V4(p) ? IPV4_MAX_BITLEN | |
3064 | : IPV6_MAX_BITLEN, | |
3065 | inet_ntoa(p->prefix.ip.ipaddr_v4)); | |
3066 | } else if (p->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) { | |
3067 | if (IS_EVPN_PREFIX_IPADDR_NONE(p)) | |
3068 | snprintf(buf, len, "[%d]:[0]:[0]:[%d]:[%s]", | |
28328ea9 | 3069 | p->prefix.route_type, 8 * ETH_ALEN, |
d62a17ae | 3070 | prefix_mac2str(&p->prefix.mac, buf1, |
3071 | sizeof(buf1))); | |
3072 | else { | |
3073 | u_char family; | |
3074 | ||
3075 | family = IS_EVPN_PREFIX_IPADDR_V4(p) ? AF_INET | |
3076 | : AF_INET6; | |
3077 | snprintf(buf, len, "[%d]:[0]:[0]:[%d]:[%s]:[%d]:[%s]", | |
28328ea9 | 3078 | p->prefix.route_type, 8 * ETH_ALEN, |
d62a17ae | 3079 | prefix_mac2str(&p->prefix.mac, buf1, |
3080 | sizeof(buf1)), | |
3081 | family == AF_INET ? IPV4_MAX_BITLEN | |
3082 | : IPV6_MAX_BITLEN, | |
3083 | inet_ntop(family, &p->prefix.ip.ip.addr, buf2, | |
3084 | PREFIX2STR_BUFFER)); | |
3085 | } | |
3086 | } else { | |
b03b8898 | 3087 | /* For EVPN route types not supported yet. */ |
f9aa3e55 QY |
3088 | snprintf(buf, len, "(unsupported route type %d)", |
3089 | p->prefix.route_type); | |
d62a17ae | 3090 | } |
3091 | ||
3092 | return (buf); | |
520d5d76 | 3093 | } |
3094 | ||
128ea8ab | 3095 | /* |
3096 | * Encode EVPN prefix in Update (MP_REACH) | |
3097 | */ | |
d62a17ae | 3098 | void bgp_evpn_encode_prefix(struct stream *s, struct prefix *p, |
3099 | struct prefix_rd *prd, mpls_label_t *label, | |
3100 | struct attr *attr, int addpath_encode, | |
3101 | u_int32_t addpath_tx_id) | |
3102 | { | |
3103 | struct prefix_evpn *evp = (struct prefix_evpn *)p; | |
3104 | int ipa_len = 0; | |
3105 | ||
3106 | if (addpath_encode) | |
3107 | stream_putl(s, addpath_tx_id); | |
3108 | ||
3109 | /* Route type */ | |
3110 | stream_putc(s, evp->prefix.route_type); | |
3111 | ||
3112 | switch (evp->prefix.route_type) { | |
3113 | case BGP_EVPN_MAC_IP_ROUTE: | |
3114 | if (IS_EVPN_PREFIX_IPADDR_V4(evp)) | |
3115 | ipa_len = IPV4_MAX_BYTELEN; | |
3116 | else if (IS_EVPN_PREFIX_IPADDR_V6(evp)) | |
3117 | ipa_len = IPV6_MAX_BYTELEN; | |
3118 | stream_putc(s, 33 + ipa_len); // 1 VNI | |
3119 | stream_put(s, prd->val, 8); /* RD */ | |
3120 | stream_put(s, 0, 10); /* ESI */ | |
3121 | stream_putl(s, 0); /* Ethernet Tag ID */ | |
28328ea9 | 3122 | stream_putc(s, 8 * ETH_ALEN); /* Mac Addr Len - bits */ |
d62a17ae | 3123 | stream_put(s, evp->prefix.mac.octet, 6); /* Mac Addr */ |
3124 | stream_putc(s, 8 * ipa_len); /* IP address Length */ | |
3125 | if (ipa_len) | |
3126 | stream_put(s, &evp->prefix.ip.ip.addr, | |
3127 | ipa_len); /* IP */ | |
3128 | stream_put(s, label, | |
3129 | BGP_LABEL_BYTES); /* VNI is contained in 'tag' */ | |
3130 | break; | |
3131 | ||
3132 | case BGP_EVPN_IMET_ROUTE: | |
3133 | stream_putc(s, 17); // TODO: length - assumes IPv4 address | |
3134 | stream_put(s, prd->val, 8); /* RD */ | |
3135 | stream_putl(s, 0); /* Ethernet Tag ID */ | |
3136 | stream_putc(s, IPV4_MAX_BITLEN); /* IP address Length - bits */ | |
3137 | /* Originating Router's IP Addr */ | |
3138 | stream_put_in_addr(s, &evp->prefix.ip.ipaddr_v4); | |
3139 | break; | |
3140 | ||
3141 | case BGP_EVPN_IP_PREFIX_ROUTE: | |
3142 | /* TODO: AddPath support. */ | |
3143 | evpn_mpattr_encode_type5(s, p, prd, label, attr); | |
3144 | break; | |
3145 | ||
3146 | default: | |
3147 | break; | |
3148 | } | |
3149 | } | |
3150 | ||
3151 | int bgp_nlri_parse_evpn(struct peer *peer, struct attr *attr, | |
3152 | struct bgp_nlri *packet, int withdraw) | |
3153 | { | |
3154 | u_char *pnt; | |
3155 | u_char *lim; | |
3156 | afi_t afi; | |
3157 | safi_t safi; | |
3158 | u_int32_t addpath_id; | |
3159 | int addpath_encoded; | |
3160 | int psize = 0; | |
3161 | u_char rtype; | |
3162 | u_char rlen; | |
3163 | struct prefix p; | |
3164 | ||
3165 | /* Check peer status. */ | |
3166 | if (peer->status != Established) { | |
3167 | zlog_err("%u:%s - EVPN update received in state %d", | |
3168 | peer->bgp->vrf_id, peer->host, peer->status); | |
3169 | return -1; | |
3170 | } | |
3171 | ||
3172 | /* Start processing the NLRI - there may be multiple in the MP_REACH */ | |
3173 | pnt = packet->nlri; | |
3174 | lim = pnt + packet->length; | |
3175 | afi = packet->afi; | |
3176 | safi = packet->safi; | |
3177 | addpath_id = 0; | |
3178 | ||
3179 | addpath_encoded = | |
3180 | (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ADDPATH_AF_RX_ADV) | |
3181 | && CHECK_FLAG(peer->af_cap[afi][safi], | |
3182 | PEER_CAP_ADDPATH_AF_TX_RCV)); | |
3183 | ||
3184 | for (; pnt < lim; pnt += psize) { | |
3185 | /* Clear prefix structure. */ | |
3186 | memset(&p, 0, sizeof(struct prefix)); | |
3187 | ||
3188 | /* Deal with path-id if AddPath is supported. */ | |
3189 | if (addpath_encoded) { | |
3190 | /* When packet overflow occurs return immediately. */ | |
3191 | if (pnt + BGP_ADDPATH_ID_LEN > lim) | |
3192 | return -1; | |
3193 | ||
3194 | addpath_id = ntohl(*((uint32_t *)pnt)); | |
3195 | pnt += BGP_ADDPATH_ID_LEN; | |
3196 | } | |
3197 | ||
3198 | /* All EVPN NLRI types start with type and length. */ | |
3199 | if (pnt + 2 > lim) | |
3200 | return -1; | |
3201 | ||
3202 | rtype = *pnt++; | |
3203 | psize = rlen = *pnt++; | |
3204 | ||
3205 | /* When packet overflow occur return immediately. */ | |
3206 | if (pnt + psize > lim) | |
3207 | return -1; | |
3208 | ||
3209 | switch (rtype) { | |
3210 | case BGP_EVPN_MAC_IP_ROUTE: | |
3211 | if (process_type2_route(peer, afi, safi, | |
3212 | withdraw ? NULL : attr, pnt, | |
3213 | psize, addpath_id)) { | |
3214 | zlog_err( | |
3215 | "%u:%s - Error in processing EVPN type-2 NLRI size %d", | |
3216 | peer->bgp->vrf_id, peer->host, psize); | |
3217 | return -1; | |
3218 | } | |
3219 | break; | |
3220 | ||
3221 | case BGP_EVPN_IMET_ROUTE: | |
3222 | if (process_type3_route(peer, afi, safi, | |
3223 | withdraw ? NULL : attr, pnt, | |
3224 | psize, addpath_id)) { | |
3225 | zlog_err( | |
3226 | "%u:%s - Error in processing EVPN type-3 NLRI size %d", | |
3227 | peer->bgp->vrf_id, peer->host, psize); | |
3228 | return -1; | |
3229 | } | |
3230 | break; | |
3231 | ||
3232 | case BGP_EVPN_IP_PREFIX_ROUTE: | |
3233 | if (process_type5_route(peer, afi, safi, attr, pnt, | |
3234 | psize, addpath_id, withdraw)) { | |
3235 | zlog_err( | |
3236 | "%u:%s - Error in processing EVPN type-5 NLRI size %d", | |
3237 | peer->bgp->vrf_id, peer->host, psize); | |
3238 | return -1; | |
3239 | } | |
3240 | break; | |
3241 | ||
3242 | default: | |
3243 | break; | |
3244 | } | |
3245 | } | |
3246 | ||
3247 | /* Packet length consistency check. */ | |
3248 | if (pnt != lim) | |
3249 | return -1; | |
3250 | ||
3251 | return 0; | |
128ea8ab | 3252 | } |
3253 | ||
10ebe1ab MK |
3254 | /* |
3255 | * Map the RTs (configured or automatically derived) of a VRF to the VRF. | |
3256 | * The mapping will be used during route processing. | |
3257 | * bgp_def: default bgp instance | |
3258 | * bgp_vrf: specific bgp vrf instance on which RT is configured | |
3259 | */ | |
3260 | void bgp_evpn_map_vrf_to_its_rts(struct bgp *bgp_vrf) | |
3261 | { | |
3262 | int i = 0; | |
3263 | struct ecommunity_val *eval = NULL; | |
3264 | struct listnode *node = NULL, *nnode = NULL; | |
3265 | struct ecommunity *ecom = NULL; | |
3266 | ||
3267 | for (ALL_LIST_ELEMENTS(bgp_vrf->vrf_import_rtl, node, nnode, ecom)) { | |
3268 | for (i = 0; i < ecom->size; i++) { | |
3269 | eval = (struct ecommunity_val *)(ecom->val | |
3270 | + (i | |
3271 | * ECOMMUNITY_SIZE)); | |
3272 | map_vrf_to_rt(bgp_vrf, eval); | |
3273 | } | |
3274 | } | |
3275 | } | |
3276 | ||
3277 | /* | |
3278 | * Unmap the RTs (configured or automatically derived) of a VRF from the VRF. | |
3279 | */ | |
3280 | void bgp_evpn_unmap_vrf_from_its_rts(struct bgp *bgp_vrf) | |
3281 | { | |
3282 | int i; | |
3283 | struct ecommunity_val *eval; | |
3284 | struct listnode *node, *nnode; | |
3285 | struct ecommunity *ecom; | |
3286 | ||
3287 | for (ALL_LIST_ELEMENTS(bgp_vrf->vrf_import_rtl, node, nnode, ecom)) { | |
3288 | for (i = 0; i < ecom->size; i++) { | |
3289 | struct vrf_irt_node *irt; | |
3290 | struct ecommunity_val eval_tmp; | |
3291 | ||
3292 | eval = (struct ecommunity_val *)(ecom->val | |
3293 | + (i | |
3294 | * ECOMMUNITY_SIZE)); | |
3295 | /* If using "automatic" RT, we only care about the | |
3296 | * local-admin sub-field. | |
3297 | * This is to facilitate using VNI as the RT for EBGP | |
3298 | * peering too. | |
3299 | */ | |
3300 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
3301 | if (!CHECK_FLAG(bgp_vrf->vrf_flags, | |
3302 | BGP_VRF_IMPORT_RT_CFGD)) | |
3303 | mask_ecom_global_admin(&eval_tmp, eval); | |
3304 | ||
3305 | irt = lookup_vrf_import_rt(&eval_tmp); | |
3306 | if (irt) | |
3307 | unmap_vrf_from_rt(bgp_vrf, irt); | |
3308 | } | |
3309 | } | |
3310 | } | |
3311 | ||
3312 | ||
128ea8ab | 3313 | |
3314 | /* | |
3315 | * Map the RTs (configured or automatically derived) of a VNI to the VNI. | |
3316 | * The mapping will be used during route processing. | |
3317 | */ | |
d62a17ae | 3318 | void bgp_evpn_map_vni_to_its_rts(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 3319 | { |
d62a17ae | 3320 | int i; |
3321 | struct ecommunity_val *eval; | |
3322 | struct listnode *node, *nnode; | |
3323 | struct ecommunity *ecom; | |
128ea8ab | 3324 | |
d62a17ae | 3325 | for (ALL_LIST_ELEMENTS(vpn->import_rtl, node, nnode, ecom)) { |
3326 | for (i = 0; i < ecom->size; i++) { | |
3327 | eval = (struct ecommunity_val *)(ecom->val | |
3328 | + (i | |
3329 | * ECOMMUNITY_SIZE)); | |
3330 | map_vni_to_rt(bgp, vpn, eval); | |
3331 | } | |
3332 | } | |
128ea8ab | 3333 | } |
3334 | ||
3335 | /* | |
3336 | * Unmap the RTs (configured or automatically derived) of a VNI from the VNI. | |
3337 | */ | |
d62a17ae | 3338 | void bgp_evpn_unmap_vni_from_its_rts(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 3339 | { |
d62a17ae | 3340 | int i; |
3341 | struct ecommunity_val *eval; | |
3342 | struct listnode *node, *nnode; | |
3343 | struct ecommunity *ecom; | |
128ea8ab | 3344 | |
d62a17ae | 3345 | for (ALL_LIST_ELEMENTS(vpn->import_rtl, node, nnode, ecom)) { |
3346 | for (i = 0; i < ecom->size; i++) { | |
3347 | struct irt_node *irt; | |
3348 | struct ecommunity_val eval_tmp; | |
128ea8ab | 3349 | |
d62a17ae | 3350 | eval = (struct ecommunity_val *)(ecom->val |
3351 | + (i | |
3352 | * ECOMMUNITY_SIZE)); | |
3353 | /* If using "automatic" RT, we only care about the | |
3354 | * local-admin sub-field. | |
3355 | * This is to facilitate using VNI as the RT for EBGP | |
3356 | * peering too. | |
3357 | */ | |
3358 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
3359 | if (!is_import_rt_configured(vpn)) | |
3360 | mask_ecom_global_admin(&eval_tmp, eval); | |
128ea8ab | 3361 | |
d62a17ae | 3362 | irt = lookup_import_rt(bgp, &eval_tmp); |
3363 | if (irt) | |
3364 | unmap_vni_from_rt(bgp, vpn, irt); | |
3365 | } | |
3366 | } | |
128ea8ab | 3367 | } |
3368 | ||
3369 | /* | |
3370 | * Derive Import RT automatically for VNI and map VNI to RT. | |
3371 | * The mapping will be used during route processing. | |
3372 | */ | |
d62a17ae | 3373 | void bgp_evpn_derive_auto_rt_import(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 3374 | { |
c581d8b0 | 3375 | form_auto_rt(bgp, vpn->vni, vpn->import_rtl); |
d62a17ae | 3376 | UNSET_FLAG(vpn->flags, VNI_FLAG_IMPRT_CFGD); |
128ea8ab | 3377 | |
d62a17ae | 3378 | /* Map RT to VNI */ |
3379 | bgp_evpn_map_vni_to_its_rts(bgp, vpn); | |
128ea8ab | 3380 | } |
3381 | ||
3382 | /* | |
3383 | * Derive Export RT automatically for VNI. | |
3384 | */ | |
d62a17ae | 3385 | void bgp_evpn_derive_auto_rt_export(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 3386 | { |
c581d8b0 | 3387 | form_auto_rt(bgp, vpn->vni, vpn->export_rtl); |
d62a17ae | 3388 | UNSET_FLAG(vpn->flags, VNI_FLAG_EXPRT_CFGD); |
128ea8ab | 3389 | } |
3390 | ||
3391 | /* | |
3392 | * Derive RD automatically for VNI using passed information - it | |
3393 | * is of the form RouterId:unique-id-for-vni. | |
3394 | */ | |
d62a17ae | 3395 | void bgp_evpn_derive_auto_rd(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 3396 | { |
d62a17ae | 3397 | char buf[100]; |
128ea8ab | 3398 | |
d62a17ae | 3399 | vpn->prd.family = AF_UNSPEC; |
3400 | vpn->prd.prefixlen = 64; | |
3401 | sprintf(buf, "%s:%hu", inet_ntoa(bgp->router_id), vpn->rd_id); | |
cbb65f5e | 3402 | (void)str2prefix_rd(buf, &vpn->prd); |
d62a17ae | 3403 | UNSET_FLAG(vpn->flags, VNI_FLAG_RD_CFGD); |
128ea8ab | 3404 | } |
3405 | ||
3406 | /* | |
3407 | * Lookup VNI. | |
3408 | */ | |
d62a17ae | 3409 | struct bgpevpn *bgp_evpn_lookup_vni(struct bgp *bgp, vni_t vni) |
128ea8ab | 3410 | { |
d62a17ae | 3411 | struct bgpevpn *vpn; |
3412 | struct bgpevpn tmp; | |
128ea8ab | 3413 | |
d62a17ae | 3414 | memset(&tmp, 0, sizeof(struct bgpevpn)); |
3415 | tmp.vni = vni; | |
3416 | vpn = hash_lookup(bgp->vnihash, &tmp); | |
3417 | return vpn; | |
128ea8ab | 3418 | } |
3419 | ||
3420 | /* | |
3421 | * Create a new vpn - invoked upon configuration or zebra notification. | |
3422 | */ | |
d62a17ae | 3423 | struct bgpevpn *bgp_evpn_new(struct bgp *bgp, vni_t vni, |
29c53922 MK |
3424 | struct in_addr originator_ip, |
3425 | vrf_id_t tenant_vrf_id) | |
128ea8ab | 3426 | { |
d62a17ae | 3427 | struct bgpevpn *vpn; |
128ea8ab | 3428 | |
d62a17ae | 3429 | if (!bgp) |
3430 | return NULL; | |
128ea8ab | 3431 | |
d62a17ae | 3432 | vpn = XCALLOC(MTYPE_BGP_EVPN, sizeof(struct bgpevpn)); |
3433 | if (!vpn) | |
3434 | return NULL; | |
128ea8ab | 3435 | |
d62a17ae | 3436 | /* Set values - RD and RT set to defaults. */ |
3437 | vpn->vni = vni; | |
3438 | vpn->originator_ip = originator_ip; | |
29c53922 | 3439 | vpn->tenant_vrf_id = tenant_vrf_id; |
128ea8ab | 3440 | |
d62a17ae | 3441 | /* Initialize route-target import and export lists */ |
3442 | vpn->import_rtl = list_new(); | |
3443 | vpn->import_rtl->cmp = (int (*)(void *, void *))evpn_route_target_cmp; | |
3444 | vpn->export_rtl = list_new(); | |
3445 | vpn->export_rtl->cmp = (int (*)(void *, void *))evpn_route_target_cmp; | |
3446 | bf_assign_index(bgp->rd_idspace, vpn->rd_id); | |
3447 | derive_rd_rt_for_vni(bgp, vpn); | |
128ea8ab | 3448 | |
d62a17ae | 3449 | /* Initialize EVPN route table. */ |
3450 | vpn->route_table = bgp_table_init(AFI_L2VPN, SAFI_EVPN); | |
128ea8ab | 3451 | |
d62a17ae | 3452 | /* Add to hash */ |
3453 | if (!hash_get(bgp->vnihash, vpn, hash_alloc_intern)) { | |
3454 | XFREE(MTYPE_BGP_EVPN, vpn); | |
3455 | return NULL; | |
3456 | } | |
6a8657d0 MK |
3457 | |
3458 | /* add to l2vni list on corresponding vrf */ | |
3459 | bgpevpn_link_to_l3vni(vpn); | |
3460 | ||
d62a17ae | 3461 | QOBJ_REG(vpn, bgpevpn); |
3462 | return vpn; | |
128ea8ab | 3463 | } |
3464 | ||
3465 | /* | |
3466 | * Free a given VPN - called in multiple scenarios such as zebra | |
3467 | * notification, configuration being deleted, advertise-all-vni disabled etc. | |
3468 | * This just frees appropriate memory, caller should have taken other | |
3469 | * needed actions. | |
3470 | */ | |
d62a17ae | 3471 | void bgp_evpn_free(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 3472 | { |
6a8657d0 | 3473 | bgpevpn_unlink_from_l3vni(vpn); |
d62a17ae | 3474 | bgp_table_unlock(vpn->route_table); |
3475 | bgp_evpn_unmap_vni_from_its_rts(bgp, vpn); | |
affe9e99 DS |
3476 | list_delete_and_null(&vpn->import_rtl); |
3477 | list_delete_and_null(&vpn->export_rtl); | |
d62a17ae | 3478 | bf_release_index(bgp->rd_idspace, vpn->rd_id); |
3479 | hash_release(bgp->vnihash, vpn); | |
3480 | QOBJ_UNREG(vpn); | |
3481 | XFREE(MTYPE_BGP_EVPN, vpn); | |
128ea8ab | 3482 | } |
3483 | ||
3484 | /* | |
3485 | * Import route into matching VNI(s). | |
3486 | */ | |
d62a17ae | 3487 | int bgp_evpn_import_route(struct bgp *bgp, afi_t afi, safi_t safi, |
3488 | struct prefix *p, struct bgp_info *ri) | |
128ea8ab | 3489 | { |
d62a17ae | 3490 | return install_uninstall_evpn_route(bgp, afi, safi, p, ri, 1); |
128ea8ab | 3491 | } |
3492 | ||
3493 | /* | |
3494 | * Unimport route from matching VNI(s). | |
3495 | */ | |
d62a17ae | 3496 | int bgp_evpn_unimport_route(struct bgp *bgp, afi_t afi, safi_t safi, |
3497 | struct prefix *p, struct bgp_info *ri) | |
128ea8ab | 3498 | { |
d62a17ae | 3499 | return install_uninstall_evpn_route(bgp, afi, safi, p, ri, 0); |
128ea8ab | 3500 | } |
3501 | ||
db0e1937 MK |
3502 | /* filter routes which have martian next hops */ |
3503 | int bgp_filter_evpn_routes_upon_martian_nh_change(struct bgp *bgp) | |
3504 | { | |
0291c246 MK |
3505 | afi_t afi; |
3506 | safi_t safi; | |
3507 | struct bgp_node *rd_rn, *rn; | |
3508 | struct bgp_table *table; | |
3509 | struct bgp_info *ri; | |
db0e1937 MK |
3510 | |
3511 | afi = AFI_L2VPN; | |
3512 | safi = SAFI_EVPN; | |
3513 | ||
3514 | /* Walk entire global routing table and evaluate routes which could be | |
3515 | * imported into this VPN. Note that we cannot just look at the routes | |
3516 | * for the VNI's RD - | |
3517 | * remote routes applicable for this VNI could have any RD. | |
3518 | */ | |
3519 | /* EVPN routes are a 2-level table. */ | |
3520 | for (rd_rn = bgp_table_top(bgp->rib[afi][safi]); rd_rn; | |
3521 | rd_rn = bgp_route_next(rd_rn)) { | |
3522 | table = (struct bgp_table *)(rd_rn->info); | |
3523 | if (!table) | |
3524 | continue; | |
3525 | ||
3526 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) { | |
3527 | ||
3528 | for (ri = rn->info; ri; ri = ri->next) { | |
3529 | ||
3530 | /* Consider "valid" remote routes applicable for | |
3531 | * this VNI. */ | |
3532 | if (!(ri->type == ZEBRA_ROUTE_BGP | |
3533 | && ri->sub_type == BGP_ROUTE_NORMAL)) | |
3534 | continue; | |
3535 | ||
60466a63 | 3536 | if (bgp_nexthop_self(bgp, ri->attr->nexthop)) { |
db0e1937 MK |
3537 | |
3538 | char attr_str[BUFSIZ]; | |
3539 | char pbuf[PREFIX_STRLEN]; | |
3540 | ||
3541 | bgp_dump_attr(ri->attr, attr_str, | |
3542 | BUFSIZ); | |
3543 | ||
3544 | if (bgp_debug_update(ri->peer, &rn->p, | |
3545 | NULL, 1)) | |
3546 | zlog_debug( | |
b682f6de | 3547 | "%u: prefix %s with attr %s - DENIED due to martian or self nexthop", |
db0e1937 MK |
3548 | bgp->vrf_id, |
3549 | prefix2str( | |
60466a63 | 3550 | &rn->p, pbuf, |
db0e1937 MK |
3551 | sizeof(pbuf)), |
3552 | attr_str); | |
3553 | ||
3554 | bgp_evpn_unimport_route(bgp, afi, safi, | |
3555 | &rn->p, ri); | |
3556 | ||
60466a63 QY |
3557 | bgp_rib_remove(rn, ri, ri->peer, afi, |
3558 | safi); | |
db0e1937 | 3559 | } |
db0e1937 MK |
3560 | } |
3561 | } | |
3562 | } | |
3563 | ||
3564 | return 0; | |
3565 | } | |
3566 | ||
128ea8ab | 3567 | /* |
3568 | * Handle del of a local MACIP. | |
3569 | */ | |
d62a17ae | 3570 | int bgp_evpn_local_macip_del(struct bgp *bgp, vni_t vni, struct ethaddr *mac, |
3571 | struct ipaddr *ip) | |
128ea8ab | 3572 | { |
d62a17ae | 3573 | struct bgpevpn *vpn; |
3574 | struct prefix_evpn p; | |
128ea8ab | 3575 | |
d62a17ae | 3576 | if (!bgp->vnihash) { |
3577 | zlog_err("%u: VNI hash not created", bgp->vrf_id); | |
3578 | return -1; | |
3579 | } | |
128ea8ab | 3580 | |
d62a17ae | 3581 | /* Lookup VNI hash - should exist. */ |
3582 | vpn = bgp_evpn_lookup_vni(bgp, vni); | |
3583 | if (!vpn || !is_vni_live(vpn)) { | |
3584 | zlog_warn("%u: VNI hash entry for VNI %u %s at MACIP DEL", | |
3585 | bgp->vrf_id, vni, vpn ? "not live" : "not found"); | |
3586 | return -1; | |
3587 | } | |
128ea8ab | 3588 | |
d62a17ae | 3589 | /* Remove EVPN type-2 route and schedule for processing. */ |
3590 | build_evpn_type2_prefix(&p, mac, ip); | |
3591 | delete_evpn_route(bgp, vpn, &p); | |
128ea8ab | 3592 | |
d62a17ae | 3593 | return 0; |
128ea8ab | 3594 | } |
3595 | ||
3596 | /* | |
3597 | * Handle add of a local MACIP. | |
3598 | */ | |
d62a17ae | 3599 | int bgp_evpn_local_macip_add(struct bgp *bgp, vni_t vni, struct ethaddr *mac, |
1a98c087 | 3600 | struct ipaddr *ip, u_char flags) |
128ea8ab | 3601 | { |
d62a17ae | 3602 | struct bgpevpn *vpn; |
3603 | struct prefix_evpn p; | |
128ea8ab | 3604 | |
d62a17ae | 3605 | if (!bgp->vnihash) { |
3606 | zlog_err("%u: VNI hash not created", bgp->vrf_id); | |
3607 | return -1; | |
3608 | } | |
128ea8ab | 3609 | |
d62a17ae | 3610 | /* Lookup VNI hash - should exist. */ |
3611 | vpn = bgp_evpn_lookup_vni(bgp, vni); | |
3612 | if (!vpn || !is_vni_live(vpn)) { | |
3613 | zlog_warn("%u: VNI hash entry for VNI %u %s at MACIP ADD", | |
3614 | bgp->vrf_id, vni, vpn ? "not live" : "not found"); | |
3615 | return -1; | |
3616 | } | |
128ea8ab | 3617 | |
d62a17ae | 3618 | /* Create EVPN type-2 route and schedule for processing. */ |
3619 | build_evpn_type2_prefix(&p, mac, ip); | |
1a98c087 | 3620 | if (update_evpn_route(bgp, vpn, &p, flags)) { |
d62a17ae | 3621 | char buf[ETHER_ADDR_STRLEN]; |
3622 | char buf2[INET6_ADDRSTRLEN]; | |
128ea8ab | 3623 | |
d62a17ae | 3624 | zlog_err( |
b34fd35d | 3625 | "%u:Failed to create Type-2 route, VNI %u %s MAC %s IP %s", |
1a98c087 | 3626 | bgp->vrf_id, vpn->vni, |
b34fd35d | 3627 | CHECK_FLAG(flags, ZEBRA_MAC_TYPE_STICKY) ? "sticky gateway" |
1a98c087 | 3628 | : "", |
d62a17ae | 3629 | prefix_mac2str(mac, buf, sizeof(buf)), |
3630 | ipaddr2str(ip, buf2, sizeof(buf2))); | |
3631 | return -1; | |
3632 | } | |
128ea8ab | 3633 | |
d62a17ae | 3634 | return 0; |
128ea8ab | 3635 | } |
3636 | ||
6a8657d0 MK |
3637 | static void link_l2vni_hash_to_l3vni(struct hash_backet *backet, |
3638 | struct bgp *bgp_vrf) | |
3639 | { | |
3640 | struct bgpevpn *vpn = NULL; | |
3641 | struct bgp *bgp_def = NULL; | |
3642 | ||
3643 | bgp_def = bgp_get_default(); | |
3644 | assert(bgp_def); | |
3645 | ||
3646 | vpn = (struct bgpevpn *)backet->data; | |
3647 | if (vpn->tenant_vrf_id == bgp_vrf->vrf_id) | |
3648 | bgpevpn_link_to_l3vni(vpn); | |
3649 | } | |
3650 | ||
fe1dc5a3 MK |
3651 | int bgp_evpn_local_l3vni_add(vni_t l3vni, |
3652 | vrf_id_t vrf_id, | |
3653 | struct ethaddr *rmac) | |
3654 | { | |
3655 | struct bgp *bgp_vrf = NULL; /* bgp VRF instance */ | |
3656 | struct bgp *bgp_def = NULL; /* default bgp instance */ | |
f1f8b53c MK |
3657 | struct listnode *node = NULL; |
3658 | struct bgpevpn *vpn = NULL; | |
fe1dc5a3 MK |
3659 | as_t as = 0; |
3660 | ||
3661 | /* get the default instamce - required to get the AS number for VRF | |
3662 | * auto-creation*/ | |
3663 | bgp_def = bgp_get_default(); | |
3664 | if (!bgp_def) { | |
3665 | zlog_err("Cannot process L3VNI %u ADD - default BGP instance not yet created", | |
3666 | l3vni); | |
3667 | return -1; | |
3668 | } | |
3669 | as = bgp_def->as; | |
3670 | ||
3671 | /* if the BGP vrf instance doesnt exist - create one */ | |
0b5131c9 | 3672 | bgp_vrf = bgp_lookup_by_name(vrf_id_to_name(vrf_id)); |
fe1dc5a3 MK |
3673 | if (!bgp_vrf) { |
3674 | ||
3675 | int ret = 0; | |
3676 | ||
3677 | ret = bgp_get(&bgp_vrf, &as, vrf_id_to_name(vrf_id), | |
3678 | BGP_INSTANCE_TYPE_VRF); | |
3679 | switch (ret) { | |
3680 | case BGP_ERR_MULTIPLE_INSTANCE_NOT_SET: | |
3681 | zlog_err("'bgp multiple-instance' not present\n"); | |
3682 | return -1; | |
3683 | case BGP_ERR_AS_MISMATCH: | |
3684 | zlog_err("BGP is already running; AS is %u\n", as); | |
3685 | return -1; | |
3686 | case BGP_ERR_INSTANCE_MISMATCH: | |
3687 | zlog_err("BGP instance name and AS number mismatch\n"); | |
3688 | return -1; | |
3689 | } | |
3690 | ||
3691 | /* mark as auto created */ | |
3692 | SET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_AUTO); | |
3693 | } | |
3694 | ||
3695 | /* associate with l3vni */ | |
3696 | bgp_vrf->l3vni = l3vni; | |
3697 | ||
3698 | /* set the router mac - to be used in mac-ip routes for this vrf */ | |
3699 | memcpy(&bgp_vrf->rmac, rmac, sizeof(struct ethaddr)); | |
3700 | ||
c581d8b0 MK |
3701 | /* auto derive RD/RT */ |
3702 | if (!CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_IMPORT_RT_CFGD)) | |
3703 | evpn_auto_rt_import_add_for_vrf(bgp_vrf); | |
3704 | if (!CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_EXPORT_RT_CFGD)) | |
3705 | evpn_auto_rt_export_add_for_vrf(bgp_vrf); | |
fe1dc5a3 | 3706 | |
6a8657d0 MK |
3707 | /* link all corresponding l2vnis */ |
3708 | hash_iterate(bgp_def->vnihash, | |
3709 | (void (*)(struct hash_backet *, void *)) | |
3710 | link_l2vni_hash_to_l3vni, | |
3711 | bgp_vrf); | |
3712 | ||
f1f8b53c MK |
3713 | /* updates all corresponding local mac-ip routes */ |
3714 | for (ALL_LIST_ELEMENTS_RO(bgp_vrf->l2vnis, node, vpn)) | |
3715 | update_routes_for_vni(bgp_def, vpn); | |
fe1dc5a3 | 3716 | |
5ba238b7 MK |
3717 | /* install all remote routes belonging to this l3vni into correspondng |
3718 | * vrf */ | |
3719 | install_routes_for_vrf(bgp_vrf); | |
fe1dc5a3 MK |
3720 | |
3721 | return 0; | |
3722 | } | |
3723 | ||
3724 | int bgp_evpn_local_l3vni_del(vni_t l3vni, | |
3725 | vrf_id_t vrf_id) | |
3726 | { | |
3727 | struct bgp *bgp_vrf = NULL; /* bgp vrf instance */ | |
f1f8b53c MK |
3728 | struct bgp *bgp_def = NULL; /* default bgp instance */ |
3729 | struct listnode *node = NULL; | |
3730 | struct bgpevpn *vpn = NULL; | |
fe1dc5a3 MK |
3731 | |
3732 | bgp_vrf = bgp_lookup_by_vrf_id(vrf_id); | |
3733 | if (!bgp_vrf) { | |
3734 | zlog_err("Cannot process L3VNI %u Del - Could not find BGP instance", | |
3735 | l3vni); | |
3736 | return -1; | |
3737 | } | |
3738 | ||
f1f8b53c MK |
3739 | bgp_def = bgp_get_default(); |
3740 | if (!bgp_def) { | |
3741 | zlog_err("Cannot process L3VNI %u Del - Could not find default BGP instance", | |
3742 | l3vni); | |
3743 | return -1; | |
3744 | } | |
3745 | ||
1eb88002 MK |
3746 | /* unimport remote routes from VRF, if it is AUTO vrf bgp_delete will |
3747 | * take care of uninstalling the routes from zebra */ | |
3748 | if (!CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_AUTO)) | |
3749 | uninstall_routes_for_vrf(bgp_vrf); | |
5ba238b7 | 3750 | |
fe1dc5a3 MK |
3751 | /* remove the l3vni from vrf instance */ |
3752 | bgp_vrf->l3vni = 0; | |
3753 | ||
3754 | /* remove the Rmac from the BGP vrf */ | |
3755 | memset(&bgp_vrf->rmac, 0, sizeof(struct ethaddr)); | |
3756 | ||
c581d8b0 | 3757 | /* delete RD/RT */ |
23a06e11 | 3758 | if (bgp_vrf->vrf_import_rtl && !list_isempty(bgp_vrf->vrf_import_rtl)) { |
10ebe1ab | 3759 | bgp_evpn_unmap_vrf_from_its_rts(bgp_vrf); |
5ba238b7 | 3760 | list_delete_all_node(bgp_vrf->vrf_import_rtl); |
23a06e11 MK |
3761 | } |
3762 | if (bgp_vrf->vrf_export_rtl && !list_isempty(bgp_vrf->vrf_export_rtl)) { | |
5ba238b7 | 3763 | list_delete_all_node(bgp_vrf->vrf_export_rtl); |
23a06e11 | 3764 | } |
fe1dc5a3 | 3765 | |
f1f8b53c MK |
3766 | /* update all corresponding local mac-ip routes */ |
3767 | for (ALL_LIST_ELEMENTS_RO(bgp_vrf->l2vnis, node, vpn)) | |
3768 | update_routes_for_vni(bgp_def, vpn); | |
fe1dc5a3 | 3769 | |
fe1dc5a3 MK |
3770 | |
3771 | /* Delete the instance if it was autocreated */ | |
3772 | if (CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_AUTO)) | |
3773 | bgp_delete(bgp_vrf); | |
3774 | ||
3775 | return 0; | |
3776 | } | |
3777 | ||
128ea8ab | 3778 | /* |
3779 | * Handle del of a local VNI. | |
3780 | */ | |
d62a17ae | 3781 | int bgp_evpn_local_vni_del(struct bgp *bgp, vni_t vni) |
128ea8ab | 3782 | { |
d62a17ae | 3783 | struct bgpevpn *vpn; |
128ea8ab | 3784 | |
d62a17ae | 3785 | if (!bgp->vnihash) { |
3786 | zlog_err("%u: VNI hash not created", bgp->vrf_id); | |
3787 | return -1; | |
3788 | } | |
128ea8ab | 3789 | |
d62a17ae | 3790 | /* Locate VNI hash */ |
3791 | vpn = bgp_evpn_lookup_vni(bgp, vni); | |
3792 | if (!vpn) { | |
3793 | zlog_warn("%u: VNI hash entry for VNI %u not found at DEL", | |
3794 | bgp->vrf_id, vni); | |
3795 | return 0; | |
3796 | } | |
128ea8ab | 3797 | |
d62a17ae | 3798 | /* Remove all local EVPN routes and schedule for processing (to |
3799 | * withdraw from peers). | |
3800 | */ | |
3801 | delete_routes_for_vni(bgp, vpn); | |
128ea8ab | 3802 | |
db0e1937 MK |
3803 | /* |
3804 | * tunnel is no longer active, del tunnel ip address from tip_hash | |
3805 | */ | |
3806 | bgp_tip_del(bgp, &vpn->originator_ip); | |
3807 | ||
d62a17ae | 3808 | /* Clear "live" flag and see if hash needs to be freed. */ |
3809 | UNSET_FLAG(vpn->flags, VNI_FLAG_LIVE); | |
3810 | if (!is_vni_configured(vpn)) | |
3811 | bgp_evpn_free(bgp, vpn); | |
128ea8ab | 3812 | |
d62a17ae | 3813 | return 0; |
128ea8ab | 3814 | } |
3815 | ||
3816 | /* | |
3817 | * Handle add (or update) of a local VNI. The only VNI change we care | |
3818 | * about is change to local-tunnel-ip. | |
3819 | */ | |
d62a17ae | 3820 | int bgp_evpn_local_vni_add(struct bgp *bgp, vni_t vni, |
29c53922 MK |
3821 | struct in_addr originator_ip, |
3822 | vrf_id_t tenant_vrf_id) | |
d62a17ae | 3823 | { |
3824 | struct bgpevpn *vpn; | |
3825 | struct prefix_evpn p; | |
3826 | ||
3827 | if (!bgp->vnihash) { | |
3828 | zlog_err("%u: VNI hash not created", bgp->vrf_id); | |
3829 | return -1; | |
3830 | } | |
3831 | ||
3832 | /* Lookup VNI. If present and no change, exit. */ | |
3833 | vpn = bgp_evpn_lookup_vni(bgp, vni); | |
ddd16ed5 | 3834 | if (vpn) { |
29c53922 MK |
3835 | |
3836 | /* update tenant_vrf_id if required */ | |
6a8657d0 MK |
3837 | if (vpn->tenant_vrf_id != tenant_vrf_id) { |
3838 | bgpevpn_unlink_from_l3vni(vpn); | |
29c53922 | 3839 | vpn->tenant_vrf_id = tenant_vrf_id; |
6a8657d0 | 3840 | bgpevpn_link_to_l3vni(vpn); |
e92bd2a2 MK |
3841 | |
3842 | /* update all routes with new export RT for VRFs */ | |
3843 | update_routes_for_vni(bgp, vpn); | |
6a8657d0 | 3844 | } |
29c53922 | 3845 | |
2f1ac16a MK |
3846 | if (is_vni_live(vpn) |
3847 | && IPV4_ADDR_SAME(&vpn->originator_ip, &originator_ip)) | |
d62a17ae | 3848 | /* Probably some other param has changed that we don't |
3849 | * care about. */ | |
3850 | return 0; | |
3851 | ||
3852 | /* Local tunnel endpoint IP address has changed */ | |
ddd16ed5 | 3853 | handle_tunnel_ip_change(bgp, vpn, originator_ip); |
d62a17ae | 3854 | } |
3855 | ||
3856 | /* Create or update as appropriate. */ | |
3857 | if (!vpn) { | |
29c53922 | 3858 | vpn = bgp_evpn_new(bgp, vni, originator_ip, tenant_vrf_id); |
d62a17ae | 3859 | if (!vpn) { |
3860 | zlog_err( | |
3861 | "%u: Failed to allocate VNI entry for VNI %u - at Add", | |
3862 | bgp->vrf_id, vni); | |
3863 | return -1; | |
3864 | } | |
3865 | } | |
3866 | ||
db0e1937 | 3867 | /* if the VNI is live already, there is nothing more to do */ |
ddd16ed5 MK |
3868 | if (is_vni_live(vpn)) |
3869 | return 0; | |
3870 | ||
d62a17ae | 3871 | /* Mark as "live" */ |
3872 | SET_FLAG(vpn->flags, VNI_FLAG_LIVE); | |
3873 | ||
db0e1937 MK |
3874 | /* tunnel is now active, add tunnel-ip to db */ |
3875 | bgp_tip_add(bgp, &originator_ip); | |
3876 | ||
3877 | /* filter routes as nexthop database has changed */ | |
3878 | bgp_filter_evpn_routes_upon_martian_nh_change(bgp); | |
3879 | ||
d62a17ae | 3880 | /* Create EVPN type-3 route and schedule for processing. */ |
3881 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
3882 | if (update_evpn_route(bgp, vpn, &p, 0)) { | |
3883 | zlog_err("%u: Type3 route creation failure for VNI %u", | |
3884 | bgp->vrf_id, vni); | |
3885 | return -1; | |
3886 | } | |
3887 | ||
3888 | /* If we have learnt and retained remote routes (VTEPs, MACs) for this | |
3889 | * VNI, | |
3890 | * install them. | |
3891 | */ | |
3892 | install_routes_for_vni(bgp, vpn); | |
3893 | ||
d7d97010 MK |
3894 | /* If we are advertising gateway mac-ip |
3895 | It needs to be conveyed again to zebra */ | |
3896 | bgp_zebra_advertise_gw_macip(bgp, vpn->advertise_gw_macip, vpn->vni); | |
3897 | ||
d62a17ae | 3898 | return 0; |
b18825eb | 3899 | } |
14c1a7bf | 3900 | |
7724c0a1 | 3901 | /* |
3902 | * Cleanup EVPN information on disable - Need to delete and withdraw | |
3903 | * EVPN routes from peers. | |
3904 | */ | |
d62a17ae | 3905 | void bgp_evpn_cleanup_on_disable(struct bgp *bgp) |
7724c0a1 | 3906 | { |
9d303b37 DL |
3907 | hash_iterate(bgp->vnihash, (void (*)(struct hash_backet *, |
3908 | void *))cleanup_vni_on_disable, | |
3909 | bgp); | |
7724c0a1 | 3910 | } |
3911 | ||
14c1a7bf | 3912 | /* |
3913 | * Cleanup EVPN information - invoked at the time of bgpd exit or when the | |
3914 | * BGP instance (default) is being freed. | |
3915 | */ | |
d62a17ae | 3916 | void bgp_evpn_cleanup(struct bgp *bgp) |
14c1a7bf | 3917 | { |
d62a17ae | 3918 | if (bgp->vnihash) |
9d303b37 DL |
3919 | hash_iterate(bgp->vnihash, (void (*)(struct hash_backet *, |
3920 | void *))free_vni_entry, | |
3921 | bgp); | |
d62a17ae | 3922 | if (bgp->import_rt_hash) |
3923 | hash_free(bgp->import_rt_hash); | |
3924 | bgp->import_rt_hash = NULL; | |
10ebe1ab MK |
3925 | if (bgp->vrf_import_rt_hash) |
3926 | hash_free(bgp->vrf_import_rt_hash); | |
3927 | bgp->vrf_import_rt_hash = NULL; | |
d62a17ae | 3928 | if (bgp->vnihash) |
3929 | hash_free(bgp->vnihash); | |
3930 | bgp->vnihash = NULL; | |
c581d8b0 | 3931 | if (bgp->vrf_import_rtl) |
bb7a24ab | 3932 | list_delete_and_null(&bgp->vrf_import_rtl); |
c581d8b0 MK |
3933 | bgp->vrf_import_rtl = NULL; |
3934 | if (bgp->vrf_export_rtl) | |
bb7a24ab | 3935 | list_delete_and_null(&bgp->vrf_export_rtl); |
c581d8b0 | 3936 | bgp->vrf_export_rtl = NULL; |
6a8657d0 | 3937 | if (bgp->l2vnis) |
bb7a24ab | 3938 | list_delete_and_null(&bgp->l2vnis); |
6a8657d0 | 3939 | bgp->l2vnis = NULL; |
d62a17ae | 3940 | bf_free(bgp->rd_idspace); |
14c1a7bf | 3941 | } |
3942 | ||
3943 | /* | |
3944 | * Initialization for EVPN | |
3945 | * Create | |
3946 | * VNI hash table | |
3947 | * hash for RT to VNI | |
3948 | * unique rd id space for auto derivation of RD for VNIs | |
3949 | */ | |
d62a17ae | 3950 | void bgp_evpn_init(struct bgp *bgp) |
3951 | { | |
3952 | bgp->vnihash = | |
3953 | hash_create(vni_hash_key_make, vni_hash_cmp, "BGP VNI Hash"); | |
3954 | bgp->import_rt_hash = | |
3955 | hash_create(import_rt_hash_key_make, import_rt_hash_cmp, | |
3956 | "BGP Import RT Hash"); | |
10ebe1ab MK |
3957 | bgp->vrf_import_rt_hash = |
3958 | hash_create(vrf_import_rt_hash_key_make, vrf_import_rt_hash_cmp, | |
3959 | "BGP VRF Import RT Hash"); | |
c581d8b0 MK |
3960 | bgp->vrf_import_rtl = list_new(); |
3961 | bgp->vrf_import_rtl->cmp = | |
3962 | (int (*)(void *, void *))evpn_route_target_cmp; | |
3963 | ||
3964 | bgp->vrf_export_rtl = list_new(); | |
3965 | bgp->vrf_export_rtl->cmp = | |
3966 | (int (*)(void *, void *))evpn_route_target_cmp; | |
6a8657d0 MK |
3967 | bgp->l2vnis = list_new(); |
3968 | bgp->l2vnis->cmp = | |
3969 | (int (*)(void *, void *))vni_hash_cmp; | |
d62a17ae | 3970 | bf_init(bgp->rd_idspace, UINT16_MAX); |
3971 | /*assign 0th index in the bitfield, so that we start with id 1*/ | |
3972 | bf_assign_zero_index(bgp->rd_idspace); | |
14c1a7bf | 3973 | } |
10ebe1ab MK |
3974 | |
3975 | void bgp_evpn_vrf_delete(struct bgp *bgp_vrf) | |
3976 | { | |
3977 | bgp_evpn_unmap_vrf_from_its_rts(bgp_vrf); | |
3978 | } |