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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; | |
5a1b3fb5 DS |
102 | |
103 | return jhash(pnt, 8, 0x5abc1234); | |
10ebe1ab MK |
104 | } |
105 | ||
106 | /* | |
107 | * Comparison function for vrf import rt hash | |
108 | */ | |
109 | static int vrf_import_rt_hash_cmp(const void *p1, const void *p2) | |
110 | { | |
111 | const struct vrf_irt_node *irt1 = p1; | |
112 | const struct vrf_irt_node *irt2 = p2; | |
113 | ||
114 | if (irt1 == NULL && irt2 == NULL) | |
115 | return 1; | |
116 | ||
117 | if (irt1 == NULL || irt2 == NULL) | |
118 | return 0; | |
119 | ||
120 | return (memcmp(irt1->rt.val, irt2->rt.val, ECOMMUNITY_SIZE) == 0); | |
121 | } | |
122 | ||
123 | /* | |
124 | * Create a new vrf import_rt in default instance | |
125 | */ | |
126 | static struct vrf_irt_node *vrf_import_rt_new(struct ecommunity_val *rt) | |
127 | { | |
128 | struct bgp *bgp_def = NULL; | |
129 | struct vrf_irt_node *irt; | |
130 | ||
131 | bgp_def = bgp_get_default(); | |
132 | if (!bgp_def) { | |
133 | zlog_err("vrf import rt new - def instance not created yet"); | |
134 | return NULL; | |
135 | } | |
136 | ||
137 | irt = XCALLOC(MTYPE_BGP_EVPN_VRF_IMPORT_RT, | |
138 | sizeof(struct vrf_irt_node)); | |
139 | if (!irt) | |
140 | return NULL; | |
141 | ||
142 | irt->rt = *rt; | |
143 | irt->vrfs = list_new(); | |
144 | ||
145 | /* Add to hash */ | |
146 | if (!hash_get(bgp_def->vrf_import_rt_hash, irt, hash_alloc_intern)) { | |
147 | XFREE(MTYPE_BGP_EVPN_VRF_IMPORT_RT, irt); | |
148 | return NULL; | |
149 | } | |
150 | ||
151 | return irt; | |
152 | } | |
153 | ||
154 | /* | |
155 | * Free the vrf import rt node | |
156 | */ | |
157 | static void vrf_import_rt_free(struct vrf_irt_node *irt) | |
158 | { | |
159 | struct bgp *bgp_def = NULL; | |
160 | ||
161 | bgp_def = bgp_get_default(); | |
162 | if (!bgp_def) { | |
163 | zlog_err("vrf import rt free - def instance not created yet"); | |
164 | return; | |
165 | } | |
166 | ||
167 | hash_release(bgp_def->vrf_import_rt_hash, irt); | |
168 | XFREE(MTYPE_BGP_EVPN_VRF_IMPORT_RT, irt); | |
169 | } | |
170 | ||
171 | /* | |
172 | * Function to lookup Import RT node - used to map a RT to set of | |
173 | * VNIs importing routes with that RT. | |
174 | */ | |
175 | static struct vrf_irt_node *lookup_vrf_import_rt(struct ecommunity_val *rt) | |
176 | { | |
177 | struct bgp *bgp_def = NULL; | |
178 | struct vrf_irt_node *irt; | |
179 | struct vrf_irt_node tmp; | |
180 | ||
181 | bgp_def = bgp_get_default(); | |
182 | if (!bgp_def) { | |
183 | zlog_err("vrf import rt lookup - def instance not created yet"); | |
184 | return NULL; | |
185 | } | |
186 | ||
187 | memset(&tmp, 0, sizeof(struct vrf_irt_node)); | |
188 | memcpy(&tmp.rt, rt, ECOMMUNITY_SIZE); | |
189 | irt = hash_lookup(bgp_def->vrf_import_rt_hash, &tmp); | |
190 | return irt; | |
191 | } | |
192 | ||
193 | /* | |
194 | * Is specified VRF present on the RT's list of "importing" VRFs? | |
195 | */ | |
996c9314 | 196 | static int is_vrf_present_in_irt_vrfs(struct list *vrfs, struct bgp *bgp_vrf) |
10ebe1ab MK |
197 | { |
198 | struct listnode *node = NULL, *nnode = NULL; | |
199 | struct bgp *tmp_bgp_vrf = NULL; | |
200 | ||
201 | for (ALL_LIST_ELEMENTS(vrfs, node, nnode, tmp_bgp_vrf)) { | |
202 | if (tmp_bgp_vrf == bgp_vrf) | |
203 | return 1; | |
204 | } | |
205 | return 0; | |
206 | } | |
207 | ||
14c1a7bf | 208 | /* |
209 | * Make import route target hash key. | |
210 | */ | |
d62a17ae | 211 | static unsigned int import_rt_hash_key_make(void *p) |
14c1a7bf | 212 | { |
d62a17ae | 213 | struct irt_node *irt = p; |
214 | char *pnt = irt->rt.val; | |
5a1b3fb5 DS |
215 | |
216 | return jhash(pnt, 8, 0xdeadbeef); | |
14c1a7bf | 217 | } |
218 | ||
219 | /* | |
220 | * Comparison function for import rt hash | |
221 | */ | |
d62a17ae | 222 | static int import_rt_hash_cmp(const void *p1, const void *p2) |
14c1a7bf | 223 | { |
d62a17ae | 224 | const struct irt_node *irt1 = p1; |
225 | const struct irt_node *irt2 = p2; | |
14c1a7bf | 226 | |
d62a17ae | 227 | if (irt1 == NULL && irt2 == NULL) |
228 | return 1; | |
14c1a7bf | 229 | |
d62a17ae | 230 | if (irt1 == NULL || irt2 == NULL) |
231 | return 0; | |
14c1a7bf | 232 | |
d62a17ae | 233 | return (memcmp(irt1->rt.val, irt2->rt.val, ECOMMUNITY_SIZE) == 0); |
14c1a7bf | 234 | } |
235 | ||
7724c0a1 | 236 | /* |
128ea8ab | 237 | * Create a new import_rt |
238 | */ | |
d62a17ae | 239 | static struct irt_node *import_rt_new(struct bgp *bgp, |
240 | struct ecommunity_val *rt) | |
128ea8ab | 241 | { |
d62a17ae | 242 | struct irt_node *irt; |
128ea8ab | 243 | |
d62a17ae | 244 | if (!bgp) |
245 | return NULL; | |
128ea8ab | 246 | |
d62a17ae | 247 | irt = XCALLOC(MTYPE_BGP_EVPN_IMPORT_RT, sizeof(struct irt_node)); |
248 | if (!irt) | |
249 | return NULL; | |
128ea8ab | 250 | |
d62a17ae | 251 | irt->rt = *rt; |
252 | irt->vnis = list_new(); | |
128ea8ab | 253 | |
d62a17ae | 254 | /* Add to hash */ |
255 | if (!hash_get(bgp->import_rt_hash, irt, hash_alloc_intern)) { | |
256 | XFREE(MTYPE_BGP_EVPN_IMPORT_RT, irt); | |
257 | return NULL; | |
258 | } | |
128ea8ab | 259 | |
d62a17ae | 260 | return irt; |
128ea8ab | 261 | } |
262 | ||
263 | /* | |
264 | * Free the import rt node | |
7724c0a1 | 265 | */ |
d62a17ae | 266 | static void import_rt_free(struct bgp *bgp, struct irt_node *irt) |
7724c0a1 | 267 | { |
d62a17ae | 268 | hash_release(bgp->import_rt_hash, irt); |
269 | XFREE(MTYPE_BGP_EVPN_IMPORT_RT, irt); | |
7724c0a1 | 270 | } |
271 | ||
14c1a7bf | 272 | /* |
128ea8ab | 273 | * Function to lookup Import RT node - used to map a RT to set of |
274 | * VNIs importing routes with that RT. | |
275 | */ | |
d62a17ae | 276 | static struct irt_node *lookup_import_rt(struct bgp *bgp, |
277 | struct ecommunity_val *rt) | |
128ea8ab | 278 | { |
d62a17ae | 279 | struct irt_node *irt; |
280 | struct irt_node tmp; | |
128ea8ab | 281 | |
d62a17ae | 282 | memset(&tmp, 0, sizeof(struct irt_node)); |
283 | memcpy(&tmp.rt, rt, ECOMMUNITY_SIZE); | |
284 | irt = hash_lookup(bgp->import_rt_hash, &tmp); | |
285 | return irt; | |
128ea8ab | 286 | } |
287 | ||
288 | /* | |
289 | * Is specified VNI present on the RT's list of "importing" VNIs? | |
290 | */ | |
d62a17ae | 291 | static int is_vni_present_in_irt_vnis(struct list *vnis, struct bgpevpn *vpn) |
128ea8ab | 292 | { |
d62a17ae | 293 | struct listnode *node, *nnode; |
294 | struct bgpevpn *tmp_vpn; | |
128ea8ab | 295 | |
d62a17ae | 296 | for (ALL_LIST_ELEMENTS(vnis, node, nnode, tmp_vpn)) { |
297 | if (tmp_vpn == vpn) | |
298 | return 1; | |
299 | } | |
128ea8ab | 300 | |
d62a17ae | 301 | return 0; |
128ea8ab | 302 | } |
303 | ||
304 | /* | |
305 | * Compare Route Targets. | |
306 | */ | |
d62a17ae | 307 | static int evpn_route_target_cmp(struct ecommunity *ecom1, |
308 | struct ecommunity *ecom2) | |
128ea8ab | 309 | { |
d62a17ae | 310 | if (ecom1 && !ecom2) |
311 | return -1; | |
128ea8ab | 312 | |
d62a17ae | 313 | if (!ecom1 && ecom2) |
314 | return 1; | |
128ea8ab | 315 | |
d62a17ae | 316 | if (!ecom1 && !ecom2) |
317 | return 0; | |
128ea8ab | 318 | |
d62a17ae | 319 | if (ecom1->str && !ecom2->str) |
320 | return -1; | |
128ea8ab | 321 | |
d62a17ae | 322 | if (!ecom1->str && ecom2->str) |
323 | return 1; | |
128ea8ab | 324 | |
d62a17ae | 325 | if (!ecom1->str && !ecom2->str) |
326 | return 0; | |
128ea8ab | 327 | |
d62a17ae | 328 | return strcmp(ecom1->str, ecom2->str); |
128ea8ab | 329 | } |
330 | ||
331 | /* | |
332 | * Mask off global-admin field of specified extended community (RT), | |
333 | * just retain the local-admin field. | |
334 | */ | |
d62a17ae | 335 | static inline void mask_ecom_global_admin(struct ecommunity_val *dst, |
336 | struct ecommunity_val *src) | |
128ea8ab | 337 | { |
d62a17ae | 338 | u_char type; |
128ea8ab | 339 | |
d62a17ae | 340 | type = src->val[0]; |
341 | dst->val[0] = 0; | |
342 | if (type == ECOMMUNITY_ENCODE_AS) { | |
343 | dst->val[2] = dst->val[3] = 0; | |
344 | } else if (type == ECOMMUNITY_ENCODE_AS4 | |
345 | || type == ECOMMUNITY_ENCODE_IP) { | |
346 | dst->val[2] = dst->val[3] = 0; | |
347 | dst->val[4] = dst->val[5] = 0; | |
348 | } | |
128ea8ab | 349 | } |
350 | ||
10ebe1ab MK |
351 | /* |
352 | * Map one RT to specified VRF. | |
353 | * bgp_vrf = BGP vrf instance | |
354 | */ | |
996c9314 | 355 | static void map_vrf_to_rt(struct bgp *bgp_vrf, struct ecommunity_val *eval) |
10ebe1ab MK |
356 | { |
357 | struct vrf_irt_node *irt = NULL; | |
358 | struct ecommunity_val eval_tmp; | |
359 | ||
360 | /* If using "automatic" RT, | |
361 | * we only care about the local-admin sub-field. | |
362 | * This is to facilitate using L3VNI(VRF-VNI) | |
363 | * as the RT for EBGP peering too. | |
364 | */ | |
365 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
996c9314 | 366 | if (!CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_IMPORT_RT_CFGD)) |
10ebe1ab MK |
367 | mask_ecom_global_admin(&eval_tmp, eval); |
368 | ||
369 | irt = lookup_vrf_import_rt(&eval_tmp); | |
370 | if (irt && irt->vrfs) | |
371 | if (is_vrf_present_in_irt_vrfs(irt->vrfs, bgp_vrf)) | |
372 | /* Already mapped. */ | |
373 | return; | |
374 | ||
375 | if (!irt) { | |
376 | irt = vrf_import_rt_new(&eval_tmp); | |
377 | assert(irt); | |
378 | } | |
379 | ||
380 | /* Add VRF to the list for this RT. */ | |
381 | listnode_add(irt->vrfs, bgp_vrf); | |
382 | } | |
383 | ||
384 | /* | |
385 | * Unmap specified VRF from specified RT. If there are no other | |
386 | * VRFs for this RT, then the RT hash is deleted. | |
387 | * bgp_vrf: BGP VRF specific instance | |
388 | */ | |
996c9314 | 389 | static void unmap_vrf_from_rt(struct bgp *bgp_vrf, struct vrf_irt_node *irt) |
10ebe1ab MK |
390 | { |
391 | /* Delete VRF from list for this RT. */ | |
392 | listnode_delete(irt->vrfs, bgp_vrf); | |
393 | if (!listnode_head(irt->vrfs)) { | |
bb7a24ab | 394 | list_delete_and_null(&irt->vrfs); |
10ebe1ab MK |
395 | vrf_import_rt_free(irt); |
396 | } | |
397 | } | |
398 | ||
128ea8ab | 399 | /* |
400 | * Map one RT to specified VNI. | |
14c1a7bf | 401 | */ |
d62a17ae | 402 | static void map_vni_to_rt(struct bgp *bgp, struct bgpevpn *vpn, |
403 | struct ecommunity_val *eval) | |
128ea8ab | 404 | { |
d62a17ae | 405 | struct irt_node *irt; |
406 | struct ecommunity_val eval_tmp; | |
128ea8ab | 407 | |
d62a17ae | 408 | /* If using "automatic" RT, we only care about the local-admin |
409 | * sub-field. | |
410 | * This is to facilitate using VNI as the RT for EBGP peering too. | |
411 | */ | |
412 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
413 | if (!is_import_rt_configured(vpn)) | |
414 | mask_ecom_global_admin(&eval_tmp, eval); | |
128ea8ab | 415 | |
d62a17ae | 416 | irt = lookup_import_rt(bgp, &eval_tmp); |
417 | if (irt && irt->vnis) | |
418 | if (is_vni_present_in_irt_vnis(irt->vnis, vpn)) | |
419 | /* Already mapped. */ | |
420 | return; | |
128ea8ab | 421 | |
d62a17ae | 422 | if (!irt) { |
423 | irt = import_rt_new(bgp, &eval_tmp); | |
424 | assert(irt); | |
425 | } | |
128ea8ab | 426 | |
d62a17ae | 427 | /* Add VNI to the hash list for this RT. */ |
428 | listnode_add(irt->vnis, vpn); | |
128ea8ab | 429 | } |
430 | ||
431 | /* | |
432 | * Unmap specified VNI from specified RT. If there are no other | |
433 | * VNIs for this RT, then the RT hash is deleted. | |
434 | */ | |
d62a17ae | 435 | static void unmap_vni_from_rt(struct bgp *bgp, struct bgpevpn *vpn, |
436 | struct irt_node *irt) | |
14c1a7bf | 437 | { |
d62a17ae | 438 | /* Delete VNI from hash list for this RT. */ |
439 | listnode_delete(irt->vnis, vpn); | |
440 | if (!listnode_head(irt->vnis)) { | |
acdf5e25 | 441 | list_delete_and_null(&irt->vnis); |
d62a17ae | 442 | import_rt_free(bgp, irt); |
443 | } | |
14c1a7bf | 444 | } |
445 | ||
128ea8ab | 446 | /* |
447 | * Create RT extended community automatically from passed information: | |
448 | * of the form AS:VNI. | |
449 | * NOTE: We use only the lower 16 bits of the AS. This is sufficient as | |
450 | * the need is to get a RT value that will be unique across different | |
451 | * VNIs but the same across routers (in the same AS) for a particular | |
452 | * VNI. | |
453 | */ | |
c581d8b0 | 454 | static void form_auto_rt(struct bgp *bgp, vni_t vni, struct list *rtl) |
128ea8ab | 455 | { |
d62a17ae | 456 | struct ecommunity_val eval; |
457 | struct ecommunity *ecomadd; | |
128ea8ab | 458 | |
c581d8b0 | 459 | encode_route_target_as((bgp->as & 0xFFFF), vni, &eval); |
128ea8ab | 460 | |
d62a17ae | 461 | ecomadd = ecommunity_new(); |
462 | ecommunity_add_val(ecomadd, &eval); | |
463 | listnode_add_sort(rtl, ecomadd); | |
128ea8ab | 464 | } |
14c1a7bf | 465 | |
466 | /* | |
128ea8ab | 467 | * Derive RD and RT for a VNI automatically. Invoked at the time of |
468 | * creation of a VNI. | |
469 | */ | |
d62a17ae | 470 | static void derive_rd_rt_for_vni(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 471 | { |
d62a17ae | 472 | bgp_evpn_derive_auto_rd(bgp, vpn); |
473 | bgp_evpn_derive_auto_rt_import(bgp, vpn); | |
474 | bgp_evpn_derive_auto_rt_export(bgp, vpn); | |
128ea8ab | 475 | } |
476 | ||
477 | /* | |
478 | * Add (update) or delete MACIP from zebra. | |
14c1a7bf | 479 | */ |
d62a17ae | 480 | static int bgp_zebra_send_remote_macip(struct bgp *bgp, struct bgpevpn *vpn, |
481 | struct prefix_evpn *p, | |
482 | struct in_addr remote_vtep_ip, int add, | |
ead40654 | 483 | u_char flags) |
d62a17ae | 484 | { |
485 | struct stream *s; | |
486 | int ipa_len; | |
487 | char buf1[ETHER_ADDR_STRLEN]; | |
488 | char buf2[INET6_ADDRSTRLEN]; | |
489 | char buf3[INET6_ADDRSTRLEN]; | |
490 | ||
491 | /* Check socket. */ | |
492 | if (!zclient || zclient->sock < 0) | |
493 | return 0; | |
494 | ||
495 | /* Don't try to register if Zebra doesn't know of this instance. */ | |
496 | if (!IS_BGP_INST_KNOWN_TO_ZEBRA(bgp)) | |
497 | return 0; | |
498 | ||
499 | s = zclient->obuf; | |
500 | stream_reset(s); | |
501 | ||
996c9314 LB |
502 | zclient_create_header( |
503 | s, add ? ZEBRA_REMOTE_MACIP_ADD : ZEBRA_REMOTE_MACIP_DEL, | |
504 | bgp->vrf_id); | |
d62a17ae | 505 | stream_putl(s, vpn->vni); |
28328ea9 | 506 | stream_put(s, &p->prefix.mac.octet, ETH_ALEN); /* Mac Addr */ |
d62a17ae | 507 | /* IP address length and IP address, if any. */ |
508 | if (IS_EVPN_PREFIX_IPADDR_NONE(p)) | |
509 | stream_putl(s, 0); | |
510 | else { | |
511 | ipa_len = IS_EVPN_PREFIX_IPADDR_V4(p) ? IPV4_MAX_BYTELEN | |
512 | : IPV6_MAX_BYTELEN; | |
513 | stream_putl(s, ipa_len); | |
514 | stream_put(s, &p->prefix.ip.ip.addr, ipa_len); | |
515 | } | |
516 | stream_put_in_addr(s, &remote_vtep_ip); | |
517 | ||
ead40654 | 518 | /* TX flags - MAC sticky status and/or gateway mac */ |
d62a17ae | 519 | if (add) |
ead40654 | 520 | stream_putc(s, flags); |
d62a17ae | 521 | |
522 | stream_putw_at(s, 0, stream_get_endp(s)); | |
523 | ||
524 | if (bgp_debug_zebra(NULL)) | |
996c9314 LB |
525 | zlog_debug( |
526 | "Tx %s MACIP, VNI %u MAC %s IP %s (flags: 0x%x) remote VTEP %s", | |
527 | add ? "ADD" : "DEL", vpn->vni, | |
528 | prefix_mac2str(&p->prefix.mac, buf1, sizeof(buf1)), | |
529 | ipaddr2str(&p->prefix.ip, buf3, sizeof(buf3)), flags, | |
530 | inet_ntop(AF_INET, &remote_vtep_ip, buf2, | |
531 | sizeof(buf2))); | |
d62a17ae | 532 | |
533 | return zclient_send_message(zclient); | |
7ef5a232 | 534 | } |
b18825eb | 535 | |
128ea8ab | 536 | /* |
537 | * Add (update) or delete remote VTEP from zebra. | |
538 | */ | |
d62a17ae | 539 | static int bgp_zebra_send_remote_vtep(struct bgp *bgp, struct bgpevpn *vpn, |
540 | struct prefix_evpn *p, int add) | |
128ea8ab | 541 | { |
d62a17ae | 542 | struct stream *s; |
128ea8ab | 543 | |
d62a17ae | 544 | /* Check socket. */ |
545 | if (!zclient || zclient->sock < 0) | |
546 | return 0; | |
128ea8ab | 547 | |
d62a17ae | 548 | /* Don't try to register if Zebra doesn't know of this instance. */ |
549 | if (!IS_BGP_INST_KNOWN_TO_ZEBRA(bgp)) | |
550 | return 0; | |
128ea8ab | 551 | |
d62a17ae | 552 | s = zclient->obuf; |
553 | stream_reset(s); | |
128ea8ab | 554 | |
996c9314 LB |
555 | zclient_create_header( |
556 | s, add ? ZEBRA_REMOTE_VTEP_ADD : ZEBRA_REMOTE_VTEP_DEL, | |
557 | bgp->vrf_id); | |
d62a17ae | 558 | stream_putl(s, vpn->vni); |
559 | if (IS_EVPN_PREFIX_IPADDR_V4(p)) | |
560 | stream_put_in_addr(s, &p->prefix.ip.ipaddr_v4); | |
561 | else if (IS_EVPN_PREFIX_IPADDR_V6(p)) { | |
562 | zlog_err( | |
563 | "Bad remote IP when trying to %s remote VTEP for VNI %u", | |
564 | add ? "ADD" : "DEL", vpn->vni); | |
565 | return -1; | |
566 | } | |
128ea8ab | 567 | |
d62a17ae | 568 | stream_putw_at(s, 0, stream_get_endp(s)); |
128ea8ab | 569 | |
d62a17ae | 570 | if (bgp_debug_zebra(NULL)) |
571 | zlog_debug("Tx %s Remote VTEP, VNI %u remote VTEP %s", | |
572 | add ? "ADD" : "DEL", vpn->vni, | |
573 | inet_ntoa(p->prefix.ip.ipaddr_v4)); | |
128ea8ab | 574 | |
d62a17ae | 575 | return zclient_send_message(zclient); |
128ea8ab | 576 | } |
577 | ||
342dd0c6 | 578 | /* |
579 | * Build extended communities for EVPN prefix route. | |
580 | */ | |
581 | static void build_evpn_type5_route_extcomm(struct bgp *bgp_vrf, | |
582 | struct attr *attr) | |
583 | { | |
584 | struct ecommunity ecom_encap; | |
585 | struct ecommunity ecom_rmac; | |
586 | struct ecommunity_val eval; | |
587 | struct ecommunity_val eval_rmac; | |
588 | bgp_encap_types tnl_type; | |
589 | struct listnode *node, *nnode; | |
590 | struct ecommunity *ecom; | |
591 | struct list *vrf_export_rtl = NULL; | |
592 | ||
593 | /* Encap */ | |
594 | tnl_type = BGP_ENCAP_TYPE_VXLAN; | |
595 | memset(&ecom_encap, 0, sizeof(ecom_encap)); | |
596 | encode_encap_extcomm(tnl_type, &eval); | |
597 | ecom_encap.size = 1; | |
598 | ecom_encap.val = (u_int8_t *)eval.val; | |
599 | ||
600 | /* Add Encap */ | |
601 | attr->ecommunity = ecommunity_dup(&ecom_encap); | |
602 | ||
603 | /* Add the export RTs for L3VNI/VRF */ | |
604 | vrf_export_rtl = bgp_vrf->vrf_export_rtl; | |
605 | if (vrf_export_rtl && !list_isempty(vrf_export_rtl)) { | |
606 | for (ALL_LIST_ELEMENTS(vrf_export_rtl, node, nnode, ecom)) | |
996c9314 LB |
607 | attr->ecommunity = |
608 | ecommunity_merge(attr->ecommunity, ecom); | |
342dd0c6 | 609 | } |
610 | ||
611 | /* add the router mac extended community */ | |
612 | if (!is_zero_mac(&attr->rmac)) { | |
613 | memset(&ecom_rmac, 0, sizeof(ecom_rmac)); | |
614 | encode_rmac_extcomm(&eval_rmac, &attr->rmac); | |
615 | ecom_rmac.size = 1; | |
616 | ecom_rmac.val = (uint8_t *)eval_rmac.val; | |
996c9314 LB |
617 | attr->ecommunity = |
618 | ecommunity_merge(attr->ecommunity, &ecom_rmac); | |
342dd0c6 | 619 | } |
620 | ||
621 | attr->flag |= ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES); | |
622 | } | |
623 | ||
128ea8ab | 624 | /* |
625 | * Build extended communities for EVPN route. RT and ENCAP are | |
626 | * applicable to all routes. | |
7ec156a9 MK |
627 | * TODO: currently kernel doesnt support ipv6 routes with ipv4 nexthops. |
628 | * This means that we can't do symmetric routing for ipv6 hosts routes | |
629 | * in the same way as ipv4 host routes. | |
630 | * We wont attach l3-vni related RTs for ipv6 routes. | |
631 | * For now, We will only adevrtise ipv4 host routes | |
632 | * with L3-VNI related ext-comm. | |
128ea8ab | 633 | */ |
7ec156a9 MK |
634 | static void build_evpn_route_extcomm(struct bgpevpn *vpn, struct attr *attr, |
635 | afi_t afi) | |
128ea8ab | 636 | { |
d62a17ae | 637 | struct ecommunity ecom_encap; |
638 | struct ecommunity ecom_sticky; | |
ead40654 | 639 | struct ecommunity ecom_default_gw; |
bc59a672 | 640 | struct ecommunity ecom_rmac; |
d62a17ae | 641 | struct ecommunity_val eval; |
642 | struct ecommunity_val eval_sticky; | |
ead40654 | 643 | struct ecommunity_val eval_default_gw; |
bc59a672 | 644 | struct ecommunity_val eval_rmac; |
d62a17ae | 645 | bgp_encap_types tnl_type; |
646 | struct listnode *node, *nnode; | |
647 | struct ecommunity *ecom; | |
648 | u_int32_t seqnum; | |
7a3e76f1 | 649 | struct list *vrf_export_rtl = NULL; |
128ea8ab | 650 | |
d62a17ae | 651 | /* Encap */ |
652 | tnl_type = BGP_ENCAP_TYPE_VXLAN; | |
653 | memset(&ecom_encap, 0, sizeof(ecom_encap)); | |
654 | encode_encap_extcomm(tnl_type, &eval); | |
655 | ecom_encap.size = 1; | |
656 | ecom_encap.val = (u_int8_t *)eval.val; | |
128ea8ab | 657 | |
d62a17ae | 658 | /* Add Encap */ |
659 | attr->ecommunity = ecommunity_dup(&ecom_encap); | |
128ea8ab | 660 | |
7a3e76f1 | 661 | /* Add the export RTs for L2VNI */ |
d62a17ae | 662 | for (ALL_LIST_ELEMENTS(vpn->export_rtl, node, nnode, ecom)) |
663 | attr->ecommunity = ecommunity_merge(attr->ecommunity, ecom); | |
128ea8ab | 664 | |
c48d9f5f MK |
665 | /* |
666 | * only attach l3-vni export rts for ipv4 address family and if we are | |
667 | * advertising both the labels in type-2 routes | |
523cafc4 | 668 | */ |
c48d9f5f | 669 | if (afi == AFI_IP && CHECK_FLAG(vpn->flags, VNI_FLAG_USE_TWO_LABELS)) { |
7ec156a9 MK |
670 | vrf_export_rtl = bgpevpn_get_vrf_export_rtl(vpn); |
671 | if (vrf_export_rtl && !list_isempty(vrf_export_rtl)) { | |
672 | for (ALL_LIST_ELEMENTS(vrf_export_rtl, node, nnode, | |
673 | ecom)) | |
996c9314 LB |
674 | attr->ecommunity = ecommunity_merge( |
675 | attr->ecommunity, ecom); | |
7ec156a9 | 676 | } |
f1f8b53c | 677 | } |
7a3e76f1 | 678 | |
d62a17ae | 679 | if (attr->sticky) { |
680 | seqnum = 0; | |
681 | memset(&ecom_sticky, 0, sizeof(ecom_sticky)); | |
682 | encode_mac_mobility_extcomm(1, seqnum, &eval_sticky); | |
683 | ecom_sticky.size = 1; | |
684 | ecom_sticky.val = (u_int8_t *)eval_sticky.val; | |
685 | attr->ecommunity = | |
686 | ecommunity_merge(attr->ecommunity, &ecom_sticky); | |
687 | } | |
c85c03c7 | 688 | |
c48d9f5f MK |
689 | /* |
690 | * only attach l3-vni rmac for ipv4 address family and if we are | |
691 | * advertising both the labels in type-2 routes | |
692 | */ | |
996c9314 LB |
693 | if (afi == AFI_IP && !is_zero_mac(&attr->rmac) |
694 | && CHECK_FLAG(vpn->flags, VNI_FLAG_USE_TWO_LABELS)) { | |
bc59a672 MK |
695 | memset(&ecom_rmac, 0, sizeof(ecom_rmac)); |
696 | encode_rmac_extcomm(&eval_rmac, &attr->rmac); | |
697 | ecom_rmac.size = 1; | |
698 | ecom_rmac.val = (uint8_t *)eval_rmac.val; | |
996c9314 LB |
699 | attr->ecommunity = |
700 | ecommunity_merge(attr->ecommunity, &ecom_rmac); | |
bc59a672 MK |
701 | } |
702 | ||
ead40654 MK |
703 | if (attr->default_gw) { |
704 | memset(&ecom_default_gw, 0, sizeof(ecom_default_gw)); | |
705 | encode_default_gw_extcomm(&eval_default_gw); | |
706 | ecom_default_gw.size = 1; | |
707 | ecom_default_gw.val = (uint8_t *)eval_default_gw.val; | |
996c9314 LB |
708 | attr->ecommunity = |
709 | ecommunity_merge(attr->ecommunity, &ecom_default_gw); | |
ead40654 MK |
710 | } |
711 | ||
d62a17ae | 712 | attr->flag |= ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES); |
128ea8ab | 713 | } |
714 | ||
715 | /* | |
716 | * Add MAC mobility extended community to attribute. | |
717 | */ | |
d62a17ae | 718 | static void add_mac_mobility_to_attr(u_int32_t seq_num, struct attr *attr) |
719 | { | |
720 | struct ecommunity ecom_tmp; | |
721 | struct ecommunity_val eval; | |
421bb26a | 722 | u_int8_t *ecom_val_ptr; |
d62a17ae | 723 | int i; |
724 | u_int8_t *pnt; | |
725 | int type = 0; | |
726 | int sub_type = 0; | |
727 | ||
728 | /* Build MM */ | |
729 | encode_mac_mobility_extcomm(0, seq_num, &eval); | |
730 | ||
731 | /* Find current MM ecommunity */ | |
421bb26a | 732 | ecom_val_ptr = NULL; |
d62a17ae | 733 | |
734 | if (attr->ecommunity) { | |
735 | for (i = 0; i < attr->ecommunity->size; i++) { | |
736 | pnt = attr->ecommunity->val + (i * 8); | |
737 | type = *pnt++; | |
738 | sub_type = *pnt++; | |
739 | ||
740 | if (type == ECOMMUNITY_ENCODE_EVPN | |
741 | && sub_type | |
742 | == ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY) { | |
421bb26a MK |
743 | ecom_val_ptr = |
744 | (u_int8_t *)(attr->ecommunity->val | |
745 | + (i * 8)); | |
d62a17ae | 746 | break; |
747 | } | |
748 | } | |
749 | } | |
750 | ||
751 | /* Update the existing MM ecommunity */ | |
421bb26a MK |
752 | if (ecom_val_ptr) { |
753 | memcpy(ecom_val_ptr, eval.val, sizeof(char) * ECOMMUNITY_SIZE); | |
d62a17ae | 754 | } |
755 | /* Add MM to existing */ | |
756 | else { | |
757 | memset(&ecom_tmp, 0, sizeof(ecom_tmp)); | |
758 | ecom_tmp.size = 1; | |
759 | ecom_tmp.val = (u_int8_t *)eval.val; | |
760 | ||
761 | attr->ecommunity = | |
762 | ecommunity_merge(attr->ecommunity, &ecom_tmp); | |
763 | } | |
128ea8ab | 764 | } |
765 | ||
766 | /* Install EVPN route into zebra. */ | |
d62a17ae | 767 | static int evpn_zebra_install(struct bgp *bgp, struct bgpevpn *vpn, |
768 | struct prefix_evpn *p, | |
ead40654 | 769 | struct in_addr remote_vtep_ip, u_char flags) |
128ea8ab | 770 | { |
d62a17ae | 771 | int ret; |
128ea8ab | 772 | |
d62a17ae | 773 | if (p->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) |
774 | ret = bgp_zebra_send_remote_macip(bgp, vpn, p, remote_vtep_ip, | |
ead40654 | 775 | 1, flags); |
d62a17ae | 776 | else |
777 | ret = bgp_zebra_send_remote_vtep(bgp, vpn, p, 1); | |
128ea8ab | 778 | |
d62a17ae | 779 | return ret; |
128ea8ab | 780 | } |
781 | ||
782 | /* Uninstall EVPN route from zebra. */ | |
d62a17ae | 783 | static int evpn_zebra_uninstall(struct bgp *bgp, struct bgpevpn *vpn, |
784 | struct prefix_evpn *p, | |
785 | struct in_addr remote_vtep_ip) | |
128ea8ab | 786 | { |
d62a17ae | 787 | int ret; |
128ea8ab | 788 | |
d62a17ae | 789 | if (p->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) |
790 | ret = bgp_zebra_send_remote_macip(bgp, vpn, p, remote_vtep_ip, | |
791 | 0, 0); | |
792 | else | |
793 | ret = bgp_zebra_send_remote_vtep(bgp, vpn, p, 0); | |
128ea8ab | 794 | |
d62a17ae | 795 | return ret; |
128ea8ab | 796 | } |
797 | ||
798 | /* | |
799 | * Due to MAC mobility, the prior "local" best route has been supplanted | |
800 | * by a "remote" best route. The prior route has to be deleted and withdrawn | |
801 | * from peers. | |
802 | */ | |
d62a17ae | 803 | static void evpn_delete_old_local_route(struct bgp *bgp, struct bgpevpn *vpn, |
804 | struct bgp_node *rn, | |
805 | struct bgp_info *old_local) | |
128ea8ab | 806 | { |
d62a17ae | 807 | struct bgp_node *global_rn; |
808 | struct bgp_info *ri; | |
809 | afi_t afi = AFI_L2VPN; | |
810 | safi_t safi = SAFI_EVPN; | |
128ea8ab | 811 | |
d62a17ae | 812 | /* Locate route node in the global EVPN routing table. Note that |
813 | * this table is a 2-level tree (RD-level + Prefix-level) similar to | |
814 | * L3VPN routes. | |
815 | */ | |
816 | global_rn = bgp_afi_node_lookup(bgp->rib[afi][safi], afi, safi, | |
817 | (struct prefix *)&rn->p, &vpn->prd); | |
818 | if (global_rn) { | |
819 | /* Delete route entry in the global EVPN table. */ | |
820 | delete_evpn_route_entry(bgp, vpn, afi, safi, global_rn, &ri); | |
128ea8ab | 821 | |
d62a17ae | 822 | /* Schedule for processing - withdraws to peers happen from |
823 | * this table. | |
824 | */ | |
825 | if (ri) | |
826 | bgp_process(bgp, global_rn, afi, safi); | |
827 | bgp_unlock_node(global_rn); | |
828 | } | |
128ea8ab | 829 | |
d62a17ae | 830 | /* Delete route entry in the VNI route table, caller to remove. */ |
831 | bgp_info_delete(rn, old_local); | |
128ea8ab | 832 | } |
833 | ||
834 | /* | |
835 | * Calculate the best path for an EVPN route. Install/update best path in zebra, | |
836 | * if appropriate. | |
837 | */ | |
d62a17ae | 838 | static int evpn_route_select_install(struct bgp *bgp, struct bgpevpn *vpn, |
839 | struct bgp_node *rn) | |
840 | { | |
841 | struct bgp_info *old_select, *new_select; | |
842 | struct bgp_info_pair old_and_new; | |
843 | afi_t afi = AFI_L2VPN; | |
844 | safi_t safi = SAFI_EVPN; | |
845 | int ret = 0; | |
996c9314 | 846 | u_char flags = 0; |
d62a17ae | 847 | |
848 | /* Compute the best path. */ | |
849 | bgp_best_selection(bgp, rn, &bgp->maxpaths[afi][safi], &old_and_new, | |
850 | afi, safi); | |
851 | old_select = old_and_new.old; | |
852 | new_select = old_and_new.new; | |
853 | ||
854 | /* If the best path hasn't changed - see if there is still something to | |
855 | * update | |
856 | * to zebra RIB. | |
857 | */ | |
858 | if (old_select && old_select == new_select | |
859 | && old_select->type == ZEBRA_ROUTE_BGP | |
860 | && old_select->sub_type == BGP_ROUTE_NORMAL | |
861 | && !CHECK_FLAG(rn->flags, BGP_NODE_USER_CLEAR) | |
862 | && !CHECK_FLAG(old_select->flags, BGP_INFO_ATTR_CHANGED) | |
863 | && !bgp->addpath_tx_used[afi][safi]) { | |
ead40654 MK |
864 | if (bgp_zebra_has_route_changed(rn, old_select)) { |
865 | if (old_select->attr->sticky) | |
866 | SET_FLAG(flags, ZEBRA_MACIP_TYPE_STICKY); | |
867 | if (old_select->attr->default_gw) | |
868 | SET_FLAG(flags, ZEBRA_MACIP_TYPE_GW); | |
996c9314 LB |
869 | ret = evpn_zebra_install( |
870 | bgp, vpn, (struct prefix_evpn *)&rn->p, | |
871 | old_select->attr->nexthop, flags); | |
ead40654 | 872 | } |
d62a17ae | 873 | UNSET_FLAG(old_select->flags, BGP_INFO_MULTIPATH_CHG); |
874 | bgp_zebra_clear_route_change_flags(rn); | |
875 | return ret; | |
876 | } | |
877 | ||
878 | /* If the user did a "clear" this flag will be set */ | |
879 | UNSET_FLAG(rn->flags, BGP_NODE_USER_CLEAR); | |
880 | ||
881 | /* bestpath has changed; update relevant fields and install or uninstall | |
882 | * into the zebra RIB. | |
883 | */ | |
884 | if (old_select || new_select) | |
885 | bgp_bump_version(rn); | |
886 | ||
887 | if (old_select) | |
888 | bgp_info_unset_flag(rn, old_select, BGP_INFO_SELECTED); | |
889 | if (new_select) { | |
890 | bgp_info_set_flag(rn, new_select, BGP_INFO_SELECTED); | |
891 | bgp_info_unset_flag(rn, new_select, BGP_INFO_ATTR_CHANGED); | |
892 | UNSET_FLAG(new_select->flags, BGP_INFO_MULTIPATH_CHG); | |
893 | } | |
894 | ||
895 | if (new_select && new_select->type == ZEBRA_ROUTE_BGP | |
896 | && new_select->sub_type == BGP_ROUTE_NORMAL) { | |
ead40654 MK |
897 | flags = 0; |
898 | if (new_select->attr->sticky) | |
899 | SET_FLAG(flags, ZEBRA_MACIP_TYPE_STICKY); | |
900 | if (new_select->attr->default_gw) | |
901 | SET_FLAG(flags, ZEBRA_MACIP_TYPE_GW); | |
d62a17ae | 902 | ret = evpn_zebra_install(bgp, vpn, (struct prefix_evpn *)&rn->p, |
996c9314 | 903 | new_select->attr->nexthop, flags); |
d62a17ae | 904 | /* If an old best existed and it was a "local" route, the only |
905 | * reason | |
906 | * it would be supplanted is due to MAC mobility procedures. So, | |
907 | * we | |
908 | * need to do an implicit delete and withdraw that route from | |
909 | * peers. | |
910 | */ | |
911 | if (old_select && old_select->peer == bgp->peer_self | |
912 | && old_select->type == ZEBRA_ROUTE_BGP | |
913 | && old_select->sub_type == BGP_ROUTE_STATIC) | |
914 | evpn_delete_old_local_route(bgp, vpn, rn, old_select); | |
915 | } else { | |
916 | if (old_select && old_select->type == ZEBRA_ROUTE_BGP | |
917 | && old_select->sub_type == BGP_ROUTE_NORMAL) | |
918 | ret = evpn_zebra_uninstall(bgp, vpn, | |
919 | (struct prefix_evpn *)&rn->p, | |
920 | old_select->attr->nexthop); | |
921 | } | |
922 | ||
923 | /* Clear any route change flags. */ | |
924 | bgp_zebra_clear_route_change_flags(rn); | |
925 | ||
926 | /* Reap old select bgp_info, if it has been removed */ | |
927 | if (old_select && CHECK_FLAG(old_select->flags, BGP_INFO_REMOVED)) | |
928 | bgp_info_reap(rn, old_select); | |
929 | ||
930 | return ret; | |
128ea8ab | 931 | } |
932 | ||
ead40654 MK |
933 | /* |
934 | * Return true if the local ri for this rn is of type gateway mac | |
935 | */ | |
936 | static int evpn_route_is_def_gw(struct bgp *bgp, struct bgp_node *rn) | |
937 | { | |
996c9314 LB |
938 | struct bgp_info *tmp_ri = NULL; |
939 | struct bgp_info *local_ri = NULL; | |
ead40654 MK |
940 | |
941 | local_ri = NULL; | |
942 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) { | |
943 | if (tmp_ri->peer == bgp->peer_self | |
944 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
945 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
946 | local_ri = tmp_ri; | |
947 | } | |
948 | ||
949 | if (!local_ri) | |
950 | return 0; | |
951 | ||
952 | return local_ri->attr->default_gw; | |
953 | } | |
954 | ||
c85c03c7 | 955 | |
956 | /* | |
957 | * Return true if the local ri for this rn has sticky set | |
958 | */ | |
d62a17ae | 959 | static int evpn_route_is_sticky(struct bgp *bgp, struct bgp_node *rn) |
c85c03c7 | 960 | { |
d62a17ae | 961 | struct bgp_info *tmp_ri; |
962 | struct bgp_info *local_ri; | |
c85c03c7 | 963 | |
d62a17ae | 964 | local_ri = NULL; |
965 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) { | |
966 | if (tmp_ri->peer == bgp->peer_self | |
967 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
968 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
969 | local_ri = tmp_ri; | |
970 | } | |
c85c03c7 | 971 | |
d62a17ae | 972 | if (!local_ri) |
973 | return 0; | |
c85c03c7 | 974 | |
d62a17ae | 975 | return local_ri->attr->sticky; |
c85c03c7 | 976 | } |
977 | ||
342dd0c6 | 978 | static int update_evpn_type5_route_entry(struct bgp *bgp_def, |
979 | struct bgp *bgp_vrf, afi_t afi, | |
980 | safi_t safi, struct bgp_node *rn, | |
5424b7ba | 981 | struct attr *attr, int *route_changed) |
342dd0c6 | 982 | { |
983 | struct attr *attr_new = NULL; | |
984 | struct bgp_info *ri = NULL; | |
985 | mpls_label_t label = MPLS_INVALID_LABEL; | |
986 | struct bgp_info *local_ri = NULL; | |
987 | struct bgp_info *tmp_ri = NULL; | |
988 | ||
5424b7ba | 989 | *route_changed = 0; |
342dd0c6 | 990 | /* locate the local route entry if any */ |
991 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) { | |
992 | if (tmp_ri->peer == bgp_def->peer_self | |
993 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
994 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
995 | local_ri = tmp_ri; | |
996 | } | |
997 | ||
998 | /* create a new route entry if one doesnt exist. | |
523cafc4 | 999 | Otherwise see if route attr has changed |
1000 | */ | |
342dd0c6 | 1001 | if (!local_ri) { |
1002 | ||
5424b7ba MK |
1003 | /* route has changed as this is the first entry */ |
1004 | *route_changed = 1; | |
1005 | ||
342dd0c6 | 1006 | /* Add (or update) attribute to hash. */ |
1007 | attr_new = bgp_attr_intern(attr); | |
1008 | ||
1009 | /* create the route info from attribute */ | |
1010 | ri = info_make(ZEBRA_ROUTE_BGP, BGP_ROUTE_STATIC, 0, | |
1011 | bgp_def->peer_self, attr_new, rn); | |
1012 | SET_FLAG(ri->flags, BGP_INFO_VALID); | |
1013 | ||
b57ba6d2 | 1014 | /* Type-5 routes advertise the L3-VNI */ |
342dd0c6 | 1015 | bgp_info_extra_get(ri); |
1016 | vni2label(bgp_vrf->l3vni, &label); | |
b57ba6d2 MK |
1017 | memcpy(&ri->extra->label, &label, sizeof(label)); |
1018 | ri->extra->num_labels = 1; | |
342dd0c6 | 1019 | |
1020 | /* add the route entry to route node*/ | |
1021 | bgp_info_add(rn, ri); | |
1022 | } else { | |
1023 | ||
1024 | tmp_ri = local_ri; | |
1025 | if (!attrhash_cmp(tmp_ri->attr, attr)) { | |
5424b7ba MK |
1026 | |
1027 | /* attribute changed */ | |
1028 | *route_changed = 1; | |
1029 | ||
342dd0c6 | 1030 | /* The attribute has changed. */ |
1031 | /* Add (or update) attribute to hash. */ | |
1032 | attr_new = bgp_attr_intern(attr); | |
1033 | bgp_info_set_flag(rn, tmp_ri, BGP_INFO_ATTR_CHANGED); | |
1034 | ||
1035 | /* Restore route, if needed. */ | |
1036 | if (CHECK_FLAG(tmp_ri->flags, BGP_INFO_REMOVED)) | |
1037 | bgp_info_restore(rn, tmp_ri); | |
1038 | ||
1039 | /* Unintern existing, set to new. */ | |
1040 | bgp_attr_unintern(&tmp_ri->attr); | |
1041 | tmp_ri->attr = attr_new; | |
1042 | tmp_ri->uptime = bgp_clock(); | |
1043 | } | |
1044 | } | |
1045 | return 0; | |
1046 | } | |
1047 | ||
1048 | /* update evpn type-5 route entry */ | |
996c9314 LB |
1049 | static int update_evpn_type5_route(struct bgp *bgp_vrf, struct prefix_evpn *evp, |
1050 | struct attr *src_attr) | |
342dd0c6 | 1051 | { |
1052 | afi_t afi = AFI_L2VPN; | |
1053 | safi_t safi = SAFI_EVPN; | |
1054 | struct attr attr; | |
1055 | struct bgp_node *rn = NULL; | |
1056 | struct bgp *bgp_def = NULL; | |
5424b7ba | 1057 | int route_changed = 0; |
342dd0c6 | 1058 | |
1059 | bgp_def = bgp_get_default(); | |
1060 | if (!bgp_def) | |
faafdfa8 | 1061 | return 0; |
342dd0c6 | 1062 | |
2f69f6d3 | 1063 | /* Build path attribute for this route - use the source attr, if |
1064 | * present, else treat as locally originated. | |
1065 | */ | |
1066 | if (src_attr) | |
1067 | bgp_attr_dup(&attr, src_attr); | |
1068 | else { | |
1069 | memset(&attr, 0, sizeof(struct attr)); | |
1070 | bgp_attr_default_set(&attr, BGP_ORIGIN_IGP); | |
1071 | } | |
1072 | /* Set nexthop to ourselves and fill in the Router MAC. */ | |
342dd0c6 | 1073 | attr.nexthop = bgp_vrf->originator_ip; |
1074 | attr.mp_nexthop_global_in = bgp_vrf->originator_ip; | |
1075 | attr.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
1076 | memcpy(&attr.rmac, &bgp_vrf->rmac, sizeof(struct ethaddr)); | |
1077 | ||
1078 | /* Setup RT and encap extended community */ | |
1079 | build_evpn_type5_route_extcomm(bgp_vrf, &attr); | |
1080 | ||
1081 | /* get the route node in global table */ | |
1082 | rn = bgp_afi_node_get(bgp_def->rib[afi][safi], afi, safi, | |
996c9314 | 1083 | (struct prefix *)evp, &bgp_vrf->vrf_prd); |
342dd0c6 | 1084 | assert(rn); |
1085 | ||
1086 | /* create or update the route entry within the route node */ | |
996c9314 LB |
1087 | update_evpn_type5_route_entry(bgp_def, bgp_vrf, afi, safi, rn, &attr, |
1088 | &route_changed); | |
342dd0c6 | 1089 | |
1090 | /* schedule for processing and unlock node */ | |
5424b7ba MK |
1091 | if (route_changed) { |
1092 | bgp_process(bgp_def, rn, afi, safi); | |
1093 | bgp_unlock_node(rn); | |
1094 | } | |
342dd0c6 | 1095 | |
1096 | /* uninten temporary */ | |
5ee65f6f | 1097 | if (!src_attr) |
1098 | aspath_unintern(&attr.aspath); | |
342dd0c6 | 1099 | return 0; |
1100 | } | |
1101 | ||
128ea8ab | 1102 | /* |
1103 | * Create or update EVPN route entry. This could be in the VNI route table | |
1104 | * or the global route table. | |
1105 | */ | |
d62a17ae | 1106 | static int update_evpn_route_entry(struct bgp *bgp, struct bgpevpn *vpn, |
1107 | afi_t afi, safi_t safi, struct bgp_node *rn, | |
1108 | struct attr *attr, int add, int vni_table, | |
1a98c087 | 1109 | struct bgp_info **ri, u_char flags) |
d62a17ae | 1110 | { |
1111 | struct bgp_info *tmp_ri; | |
1112 | struct bgp_info *local_ri, *remote_ri; | |
1113 | struct attr *attr_new; | |
b57ba6d2 MK |
1114 | mpls_label_t label[BGP_MAX_LABELS]; |
1115 | u_int32_t num_labels = 1; | |
d62a17ae | 1116 | int route_change = 1; |
1117 | u_char sticky = 0; | |
b57ba6d2 | 1118 | struct prefix_evpn *evp; |
d62a17ae | 1119 | |
1120 | *ri = NULL; | |
b57ba6d2 MK |
1121 | evp = (struct prefix_evpn *)&rn->p; |
1122 | memset(&label, 0, sizeof(label)); | |
d62a17ae | 1123 | |
1124 | /* See if this is an update of an existing route, or a new add. Also, | |
1125 | * identify if already known from remote, and if so, the one with the | |
1126 | * highest sequence number; this is only when adding to the VNI routing | |
1127 | * table. | |
1128 | */ | |
1129 | local_ri = remote_ri = NULL; | |
1130 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) { | |
1131 | if (tmp_ri->peer == bgp->peer_self | |
1132 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
1133 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
1134 | local_ri = tmp_ri; | |
1135 | if (vni_table) { | |
1136 | if (tmp_ri->type == ZEBRA_ROUTE_BGP | |
1137 | && tmp_ri->sub_type == BGP_ROUTE_NORMAL | |
1138 | && CHECK_FLAG(tmp_ri->flags, BGP_INFO_VALID)) { | |
1139 | if (!remote_ri) | |
1140 | remote_ri = tmp_ri; | |
1141 | else if (mac_mobility_seqnum(tmp_ri->attr) | |
1142 | > mac_mobility_seqnum(remote_ri->attr)) | |
1143 | remote_ri = tmp_ri; | |
1144 | } | |
1145 | } | |
1146 | } | |
1147 | ||
1148 | /* If route doesn't exist already, create a new one, if told to. | |
1149 | * Otherwise act based on whether the attributes of the route have | |
1150 | * changed or not. | |
1151 | */ | |
1152 | if (!local_ri && !add) | |
1153 | return 0; | |
1154 | ||
1155 | if (!local_ri) { | |
1156 | /* When learnt locally for the first time but already known from | |
1157 | * remote, we have to initiate appropriate MAC mobility steps. | |
1158 | * This | |
1159 | * is applicable when updating the VNI routing table. | |
1a98c087 MK |
1160 | * We need to skip mobility steps for g/w macs (local mac on g/w |
1161 | * SVI) advertised in EVPN. | |
1162 | * This will ensure that local routes are preferred for g/w macs | |
d62a17ae | 1163 | */ |
ead40654 | 1164 | if (remote_ri && !CHECK_FLAG(flags, ZEBRA_MACIP_TYPE_GW)) { |
d62a17ae | 1165 | u_int32_t cur_seqnum; |
1166 | ||
1167 | /* Add MM extended community to route. */ | |
1168 | cur_seqnum = mac_mobility_seqnum(remote_ri->attr); | |
1169 | add_mac_mobility_to_attr(cur_seqnum + 1, attr); | |
1170 | } | |
1171 | ||
1172 | /* Add (or update) attribute to hash. */ | |
1173 | attr_new = bgp_attr_intern(attr); | |
1174 | ||
1175 | /* Extract MAC mobility sequence number, if any. */ | |
1176 | attr_new->mm_seqnum = | |
1177 | bgp_attr_mac_mobility_seqnum(attr_new, &sticky); | |
1178 | attr_new->sticky = sticky; | |
1179 | ||
1180 | /* Create new route with its attribute. */ | |
1181 | tmp_ri = info_make(ZEBRA_ROUTE_BGP, BGP_ROUTE_STATIC, 0, | |
1182 | bgp->peer_self, attr_new, rn); | |
1183 | SET_FLAG(tmp_ri->flags, BGP_INFO_VALID); | |
1184 | bgp_info_extra_get(tmp_ri); | |
1185 | ||
1186 | /* The VNI goes into the 'label' field of the route */ | |
b57ba6d2 | 1187 | vni2label(vpn->vni, &label[0]); |
c48d9f5f MK |
1188 | |
1189 | /* Type-2 routes may carry a second VNI - the L3-VNI. | |
1190 | * Only attach second label if we are advertising two labels for | |
1191 | * type-2 routes. | |
1192 | */ | |
996c9314 LB |
1193 | if (evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE |
1194 | && CHECK_FLAG(vpn->flags, VNI_FLAG_USE_TWO_LABELS)) { | |
b57ba6d2 MK |
1195 | vni_t l3vni; |
1196 | ||
1197 | l3vni = bgpevpn_get_l3vni(vpn); | |
1198 | if (l3vni) { | |
1199 | vni2label(l3vni, &label[1]); | |
1200 | num_labels++; | |
1201 | } | |
1202 | } | |
d62a17ae | 1203 | |
b57ba6d2 MK |
1204 | memcpy(&tmp_ri->extra->label, label, sizeof(label)); |
1205 | tmp_ri->extra->num_labels = num_labels; | |
d62a17ae | 1206 | bgp_info_add(rn, tmp_ri); |
1207 | } else { | |
1208 | tmp_ri = local_ri; | |
1209 | if (attrhash_cmp(tmp_ri->attr, attr) | |
1210 | && !CHECK_FLAG(tmp_ri->flags, BGP_INFO_REMOVED)) | |
1211 | route_change = 0; | |
1212 | else { | |
c48d9f5f MK |
1213 | /* |
1214 | * The attributes have changed, type-2 routes needs to | |
1215 | * be advertised with right labels. | |
1216 | */ | |
1217 | vni2label(vpn->vni, &label[0]); | |
996c9314 LB |
1218 | if (evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE |
1219 | && CHECK_FLAG(vpn->flags, | |
1220 | VNI_FLAG_USE_TWO_LABELS)) { | |
c48d9f5f MK |
1221 | vni_t l3vni; |
1222 | ||
1223 | l3vni = bgpevpn_get_l3vni(vpn); | |
1224 | if (l3vni) { | |
1225 | vni2label(l3vni, &label[1]); | |
1226 | num_labels++; | |
1227 | } | |
1228 | } | |
1229 | memcpy(&tmp_ri->extra->label, label, sizeof(label)); | |
1230 | tmp_ri->extra->num_labels = num_labels; | |
1231 | ||
d62a17ae | 1232 | /* The attribute has changed. */ |
1233 | /* Add (or update) attribute to hash. */ | |
1234 | attr_new = bgp_attr_intern(attr); | |
1235 | bgp_info_set_flag(rn, tmp_ri, BGP_INFO_ATTR_CHANGED); | |
1236 | ||
1237 | /* Restore route, if needed. */ | |
1238 | if (CHECK_FLAG(tmp_ri->flags, BGP_INFO_REMOVED)) | |
1239 | bgp_info_restore(rn, tmp_ri); | |
1240 | ||
1241 | /* Unintern existing, set to new. */ | |
1242 | bgp_attr_unintern(&tmp_ri->attr); | |
1243 | tmp_ri->attr = attr_new; | |
1244 | tmp_ri->uptime = bgp_clock(); | |
1245 | } | |
1246 | } | |
1247 | ||
1248 | /* Return back the route entry. */ | |
1249 | *ri = tmp_ri; | |
1250 | return route_change; | |
128ea8ab | 1251 | } |
1252 | ||
1253 | /* | |
1254 | * Create or update EVPN route (of type based on prefix) for specified VNI | |
1255 | * and schedule for processing. | |
1256 | */ | |
d62a17ae | 1257 | static int update_evpn_route(struct bgp *bgp, struct bgpevpn *vpn, |
1a98c087 | 1258 | struct prefix_evpn *p, u_char flags) |
128ea8ab | 1259 | { |
d62a17ae | 1260 | struct bgp_node *rn; |
1261 | struct attr attr; | |
1262 | struct attr *attr_new; | |
1263 | struct bgp_info *ri; | |
1264 | afi_t afi = AFI_L2VPN; | |
1265 | safi_t safi = SAFI_EVPN; | |
1266 | int route_change; | |
128ea8ab | 1267 | |
d62a17ae | 1268 | memset(&attr, 0, sizeof(struct attr)); |
128ea8ab | 1269 | |
d62a17ae | 1270 | /* Build path-attribute for this route. */ |
1271 | bgp_attr_default_set(&attr, BGP_ORIGIN_IGP); | |
1272 | attr.nexthop = vpn->originator_ip; | |
1273 | attr.mp_nexthop_global_in = vpn->originator_ip; | |
1274 | attr.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
317f1fe0 | 1275 | attr.sticky = CHECK_FLAG(flags, ZEBRA_MACIP_TYPE_STICKY) ? 1 : 0; |
ead40654 | 1276 | attr.default_gw = CHECK_FLAG(flags, ZEBRA_MACIP_TYPE_GW) ? 1 : 0; |
be41eb68 MK |
1277 | |
1278 | /* PMSI is only needed for type-3 routes */ | |
1279 | if (p->prefix.route_type == BGP_EVPN_IMET_ROUTE) | |
1280 | attr.flag |= ATTR_FLAG_BIT(BGP_ATTR_PMSI_TUNNEL); | |
1281 | ||
1282 | /* router mac is only needed for type-2 and type-5 routes */ | |
1283 | if (p->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) | |
1284 | bgpevpn_get_rmac(vpn, &attr.rmac); | |
a21bd7a3 | 1285 | vni2label(vpn->vni, &(attr.label)); |
128ea8ab | 1286 | |
d62a17ae | 1287 | /* Set up RT and ENCAP extended community. */ |
996c9314 LB |
1288 | build_evpn_route_extcomm( |
1289 | vpn, &attr, IS_EVPN_PREFIX_IPADDR_V4(p) ? AFI_IP : AFI_IP6); | |
128ea8ab | 1290 | |
d62a17ae | 1291 | /* First, create (or fetch) route node within the VNI. */ |
1292 | /* NOTE: There is no RD here. */ | |
1293 | rn = bgp_node_get(vpn->route_table, (struct prefix *)p); | |
128ea8ab | 1294 | |
d62a17ae | 1295 | /* Create or update route entry. */ |
1296 | route_change = update_evpn_route_entry(bgp, vpn, afi, safi, rn, &attr, | |
1a98c087 | 1297 | 1, 1, &ri, flags); |
d62a17ae | 1298 | assert(ri); |
1299 | attr_new = ri->attr; | |
128ea8ab | 1300 | |
d62a17ae | 1301 | /* Perform route selection; this is just to set the flags correctly |
1302 | * as local route in the VNI always wins. | |
1303 | */ | |
1304 | evpn_route_select_install(bgp, vpn, rn); | |
1305 | bgp_unlock_node(rn); | |
128ea8ab | 1306 | |
d62a17ae | 1307 | /* If this is a new route or some attribute has changed, export the |
1308 | * route to the global table. The route will be advertised to peers | |
1309 | * from there. Note that this table is a 2-level tree (RD-level + | |
1310 | * Prefix-level) similar to L3VPN routes. | |
1311 | */ | |
1312 | if (route_change) { | |
1313 | struct bgp_info *global_ri; | |
128ea8ab | 1314 | |
d62a17ae | 1315 | rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, |
1316 | (struct prefix *)p, &vpn->prd); | |
1317 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, attr_new, 1, 0, | |
1a98c087 | 1318 | &global_ri, flags); |
128ea8ab | 1319 | |
d62a17ae | 1320 | /* Schedule for processing and unlock node. */ |
1321 | bgp_process(bgp, rn, afi, safi); | |
1322 | bgp_unlock_node(rn); | |
1323 | } | |
128ea8ab | 1324 | |
d62a17ae | 1325 | /* Unintern temporary. */ |
1326 | aspath_unintern(&attr.aspath); | |
128ea8ab | 1327 | |
d62a17ae | 1328 | return 0; |
128ea8ab | 1329 | } |
1330 | ||
342dd0c6 | 1331 | /* Delete EVPN type5 route entry from global table */ |
1332 | static void delete_evpn_type5_route_entry(struct bgp *bgp_def, | |
996c9314 LB |
1333 | struct bgp *bgp_vrf, afi_t afi, |
1334 | safi_t safi, struct bgp_node *rn, | |
342dd0c6 | 1335 | struct bgp_info **ri) |
1336 | { | |
1337 | struct bgp_info *tmp_ri = NULL; | |
1338 | ||
1339 | *ri = NULL; | |
1340 | ||
1341 | /* find the matching route entry */ | |
1342 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) | |
1343 | if (tmp_ri->peer == bgp_def->peer_self | |
1344 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
1345 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
1346 | break; | |
1347 | ||
1348 | *ri = tmp_ri; | |
1349 | ||
1350 | /* Mark route for delete. */ | |
1351 | if (tmp_ri) | |
1352 | bgp_info_delete(rn, tmp_ri); | |
1353 | } | |
1354 | ||
1355 | /* Delete EVPN type5 route */ | |
996c9314 | 1356 | static int delete_evpn_type5_route(struct bgp *bgp_vrf, struct prefix_evpn *evp) |
342dd0c6 | 1357 | { |
1358 | afi_t afi = AFI_L2VPN; | |
1359 | safi_t safi = SAFI_EVPN; | |
1360 | struct bgp_node *rn = NULL; | |
1361 | struct bgp_info *ri = NULL; | |
1362 | struct bgp *bgp_def = NULL; /* default bgp instance */ | |
1363 | ||
1364 | bgp_def = bgp_get_default(); | |
1365 | if (!bgp_def) | |
faafdfa8 | 1366 | return 0; |
342dd0c6 | 1367 | |
1368 | /* locate the global route entry for this type-5 prefix */ | |
1369 | rn = bgp_afi_node_lookup(bgp_def->rib[afi][safi], afi, safi, | |
1370 | (struct prefix *)evp, &bgp_vrf->vrf_prd); | |
1371 | if (!rn) | |
1372 | return 0; | |
1373 | ||
1374 | delete_evpn_type5_route_entry(bgp_def, bgp_vrf, afi, safi, rn, &ri); | |
1375 | if (ri) | |
1376 | bgp_process(bgp_def, rn, afi, safi); | |
1377 | bgp_unlock_node(rn); | |
1378 | return 0; | |
1379 | } | |
1380 | ||
128ea8ab | 1381 | /* |
1382 | * Delete EVPN route entry. This could be in the VNI route table | |
1383 | * or the global route table. | |
1384 | */ | |
d62a17ae | 1385 | static void delete_evpn_route_entry(struct bgp *bgp, struct bgpevpn *vpn, |
1386 | afi_t afi, safi_t safi, struct bgp_node *rn, | |
1387 | struct bgp_info **ri) | |
128ea8ab | 1388 | { |
d62a17ae | 1389 | struct bgp_info *tmp_ri; |
128ea8ab | 1390 | |
d62a17ae | 1391 | *ri = NULL; |
128ea8ab | 1392 | |
d62a17ae | 1393 | /* Now, find matching route. */ |
1394 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) | |
1395 | if (tmp_ri->peer == bgp->peer_self | |
1396 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
1397 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
1398 | break; | |
128ea8ab | 1399 | |
d62a17ae | 1400 | *ri = tmp_ri; |
128ea8ab | 1401 | |
d62a17ae | 1402 | /* Mark route for delete. */ |
1403 | if (tmp_ri) | |
1404 | bgp_info_delete(rn, tmp_ri); | |
128ea8ab | 1405 | } |
1406 | ||
1407 | /* | |
1408 | * Delete EVPN route (of type based on prefix) for specified VNI and | |
1409 | * schedule for processing. | |
1410 | */ | |
d62a17ae | 1411 | static int delete_evpn_route(struct bgp *bgp, struct bgpevpn *vpn, |
1412 | struct prefix_evpn *p) | |
1413 | { | |
1414 | struct bgp_node *rn, *global_rn; | |
1415 | struct bgp_info *ri; | |
1416 | afi_t afi = AFI_L2VPN; | |
1417 | safi_t safi = SAFI_EVPN; | |
1418 | ||
1419 | /* First, locate the route node within the VNI. If it doesn't exist, | |
1420 | * there | |
1421 | * is nothing further to do. | |
1422 | */ | |
1423 | /* NOTE: There is no RD here. */ | |
1424 | rn = bgp_node_lookup(vpn->route_table, (struct prefix *)p); | |
1425 | if (!rn) | |
1426 | return 0; | |
1427 | ||
1428 | /* Next, locate route node in the global EVPN routing table. Note that | |
1429 | * this table is a 2-level tree (RD-level + Prefix-level) similar to | |
1430 | * L3VPN routes. | |
1431 | */ | |
1432 | global_rn = bgp_afi_node_lookup(bgp->rib[afi][safi], afi, safi, | |
1433 | (struct prefix *)p, &vpn->prd); | |
1434 | if (global_rn) { | |
1435 | /* Delete route entry in the global EVPN table. */ | |
1436 | delete_evpn_route_entry(bgp, vpn, afi, safi, global_rn, &ri); | |
1437 | ||
1438 | /* Schedule for processing - withdraws to peers happen from | |
1439 | * this table. | |
1440 | */ | |
1441 | if (ri) | |
1442 | bgp_process(bgp, global_rn, afi, safi); | |
1443 | bgp_unlock_node(global_rn); | |
1444 | } | |
1445 | ||
1446 | /* Delete route entry in the VNI route table. This can just be removed. | |
1447 | */ | |
1448 | delete_evpn_route_entry(bgp, vpn, afi, safi, rn, &ri); | |
1449 | if (ri) | |
1450 | bgp_info_reap(rn, ri); | |
1451 | bgp_unlock_node(rn); | |
1452 | ||
1453 | return 0; | |
128ea8ab | 1454 | } |
1455 | ||
1456 | /* | |
1457 | * Update all type-2 (MACIP) local routes for this VNI - these should also | |
1458 | * be scheduled for advertise to peers. | |
1459 | */ | |
d62a17ae | 1460 | static int update_all_type2_routes(struct bgp *bgp, struct bgpevpn *vpn) |
1461 | { | |
1462 | afi_t afi; | |
1463 | safi_t safi; | |
1464 | struct bgp_node *rn; | |
1465 | struct bgp_info *ri; | |
1466 | struct attr attr; | |
1467 | struct attr attr_sticky; | |
ead40654 | 1468 | struct attr attr_def_gw; |
7ec156a9 MK |
1469 | struct attr attr_ip6; |
1470 | struct attr attr_sticky_ip6; | |
ead40654 | 1471 | struct attr attr_def_gw_ip6; |
d62a17ae | 1472 | struct attr *attr_new; |
1473 | ||
1474 | afi = AFI_L2VPN; | |
1475 | safi = SAFI_EVPN; | |
1476 | memset(&attr, 0, sizeof(struct attr)); | |
1477 | memset(&attr_sticky, 0, sizeof(struct attr)); | |
ead40654 | 1478 | memset(&attr_def_gw, 0, sizeof(struct attr)); |
7ec156a9 MK |
1479 | memset(&attr_ip6, 0, sizeof(struct attr)); |
1480 | memset(&attr_sticky_ip6, 0, sizeof(struct attr)); | |
ead40654 | 1481 | memset(&attr_def_gw_ip6, 0, sizeof(struct attr)); |
d62a17ae | 1482 | |
1483 | /* Build path-attribute - all type-2 routes for this VNI will share the | |
1484 | * same path attribute. | |
1485 | */ | |
1486 | bgp_attr_default_set(&attr, BGP_ORIGIN_IGP); | |
1487 | bgp_attr_default_set(&attr_sticky, BGP_ORIGIN_IGP); | |
ead40654 | 1488 | bgp_attr_default_set(&attr_def_gw, BGP_ORIGIN_IGP); |
d62a17ae | 1489 | attr.nexthop = vpn->originator_ip; |
1490 | attr.mp_nexthop_global_in = vpn->originator_ip; | |
1491 | attr.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
bc59a672 | 1492 | bgpevpn_get_rmac(vpn, &attr.rmac); |
d62a17ae | 1493 | attr_sticky.nexthop = vpn->originator_ip; |
1494 | attr_sticky.mp_nexthop_global_in = vpn->originator_ip; | |
1495 | attr_sticky.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
1496 | attr_sticky.sticky = 1; | |
bc59a672 | 1497 | bgpevpn_get_rmac(vpn, &attr_sticky.rmac); |
ead40654 MK |
1498 | attr_def_gw.nexthop = vpn->originator_ip; |
1499 | attr_def_gw.mp_nexthop_global_in = vpn->originator_ip; | |
1500 | attr_def_gw.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
1501 | attr_def_gw.default_gw = 1; | |
1502 | bgpevpn_get_rmac(vpn, &attr_def_gw.rmac); | |
7ec156a9 MK |
1503 | bgp_attr_default_set(&attr_ip6, BGP_ORIGIN_IGP); |
1504 | bgp_attr_default_set(&attr_sticky_ip6, BGP_ORIGIN_IGP); | |
a6ad0a41 | 1505 | bgp_attr_default_set(&attr_def_gw_ip6, BGP_ORIGIN_IGP); |
7ec156a9 MK |
1506 | attr_ip6.nexthop = vpn->originator_ip; |
1507 | attr_ip6.mp_nexthop_global_in = vpn->originator_ip; | |
1508 | attr_ip6.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
1509 | bgpevpn_get_rmac(vpn, &attr_ip6.rmac); | |
1510 | attr_sticky_ip6.nexthop = vpn->originator_ip; | |
1511 | attr_sticky_ip6.mp_nexthop_global_in = vpn->originator_ip; | |
1512 | attr_sticky_ip6.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
1513 | attr_sticky_ip6.sticky = 1; | |
1514 | bgpevpn_get_rmac(vpn, &attr_sticky_ip6.rmac); | |
ead40654 MK |
1515 | attr_def_gw_ip6.nexthop = vpn->originator_ip; |
1516 | attr_def_gw_ip6.mp_nexthop_global_in = vpn->originator_ip; | |
1517 | attr_def_gw_ip6.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
1518 | attr_def_gw_ip6.default_gw = 1; | |
1519 | bgpevpn_get_rmac(vpn, &attr_def_gw_ip6.rmac); | |
d62a17ae | 1520 | |
1521 | /* Set up RT, ENCAP and sticky MAC extended community. */ | |
7ec156a9 MK |
1522 | build_evpn_route_extcomm(vpn, &attr, AFI_IP); |
1523 | build_evpn_route_extcomm(vpn, &attr_sticky, AFI_IP); | |
ead40654 | 1524 | build_evpn_route_extcomm(vpn, &attr_def_gw, AFI_IP); |
7ec156a9 MK |
1525 | build_evpn_route_extcomm(vpn, &attr_ip6, AFI_IP6); |
1526 | build_evpn_route_extcomm(vpn, &attr_sticky_ip6, AFI_IP6); | |
ead40654 | 1527 | build_evpn_route_extcomm(vpn, &attr_def_gw_ip6, AFI_IP); |
d62a17ae | 1528 | |
1529 | /* Walk this VNI's route table and update local type-2 routes. For any | |
1530 | * routes updated, update corresponding entry in the global table too. | |
1531 | */ | |
1532 | for (rn = bgp_table_top(vpn->route_table); rn; | |
1533 | rn = bgp_route_next(rn)) { | |
1534 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
1535 | struct bgp_node *rd_rn; | |
1536 | struct bgp_info *global_ri; | |
1537 | ||
1538 | if (evp->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE) | |
1539 | continue; | |
1540 | ||
7ec156a9 MK |
1541 | if (IS_EVPN_PREFIX_IPADDR_V4(evp)) { |
1542 | if (evpn_route_is_sticky(bgp, rn)) | |
1543 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, | |
996c9314 LB |
1544 | &attr_sticky, 0, 1, &ri, |
1545 | 0); | |
ead40654 MK |
1546 | else if (evpn_route_is_def_gw(bgp, rn)) |
1547 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, | |
996c9314 LB |
1548 | &attr_def_gw, 0, 1, &ri, |
1549 | 0); | |
7ec156a9 MK |
1550 | else |
1551 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, | |
1552 | &attr, 0, 1, &ri, 0); | |
1553 | } else { | |
1554 | if (evpn_route_is_sticky(bgp, rn)) | |
1555 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, | |
1556 | &attr_sticky_ip6, 0, 1, | |
1557 | &ri, 0); | |
ead40654 MK |
1558 | else if (evpn_route_is_def_gw(bgp, rn)) |
1559 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, | |
1560 | &attr_def_gw_ip6, 0, 1, | |
1561 | &ri, 0); | |
7ec156a9 MK |
1562 | else |
1563 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, | |
996c9314 LB |
1564 | &attr_ip6, 0, 1, &ri, |
1565 | 0); | |
7ec156a9 | 1566 | } |
d62a17ae | 1567 | |
1568 | /* If a local route exists for this prefix, we need to update | |
1569 | * the global routing table too. | |
1570 | */ | |
1571 | if (!ri) | |
1572 | continue; | |
1573 | ||
1574 | /* Perform route selection; this is just to set the flags | |
1575 | * correctly | |
1576 | * as local route in the VNI always wins. | |
1577 | */ | |
1578 | evpn_route_select_install(bgp, vpn, rn); | |
1579 | ||
1580 | attr_new = ri->attr; | |
1581 | ||
1582 | /* Update route in global routing table. */ | |
1583 | rd_rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, | |
1584 | (struct prefix *)evp, &vpn->prd); | |
1585 | assert(rd_rn); | |
1586 | update_evpn_route_entry(bgp, vpn, afi, safi, rd_rn, attr_new, 0, | |
1a98c087 | 1587 | 0, &global_ri, 0); |
d62a17ae | 1588 | |
1589 | /* Schedule for processing and unlock node. */ | |
1590 | bgp_process(bgp, rd_rn, afi, safi); | |
1591 | bgp_unlock_node(rd_rn); | |
1592 | } | |
1593 | ||
1594 | /* Unintern temporary. */ | |
1595 | aspath_unintern(&attr.aspath); | |
ead40654 | 1596 | aspath_unintern(&attr_ip6.aspath); |
d62a17ae | 1597 | aspath_unintern(&attr_sticky.aspath); |
ead40654 MK |
1598 | aspath_unintern(&attr_sticky_ip6.aspath); |
1599 | aspath_unintern(&attr_def_gw.aspath); | |
1600 | aspath_unintern(&attr_def_gw_ip6.aspath); | |
d62a17ae | 1601 | |
1602 | return 0; | |
128ea8ab | 1603 | } |
1604 | ||
1605 | /* | |
1606 | * Delete all type-2 (MACIP) local routes for this VNI - only from the | |
1607 | * global routing table. These are also scheduled for withdraw from peers. | |
1608 | */ | |
d62a17ae | 1609 | static int delete_global_type2_routes(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1610 | { |
d62a17ae | 1611 | afi_t afi; |
1612 | safi_t safi; | |
1613 | struct bgp_node *rdrn, *rn; | |
1614 | struct bgp_table *table; | |
1615 | struct bgp_info *ri; | |
128ea8ab | 1616 | |
d62a17ae | 1617 | afi = AFI_L2VPN; |
1618 | safi = SAFI_EVPN; | |
128ea8ab | 1619 | |
d62a17ae | 1620 | rdrn = bgp_node_lookup(bgp->rib[afi][safi], (struct prefix *)&vpn->prd); |
1621 | if (rdrn && rdrn->info) { | |
1622 | table = (struct bgp_table *)rdrn->info; | |
1623 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) { | |
1624 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
128ea8ab | 1625 | |
d62a17ae | 1626 | if (evp->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE) |
1627 | continue; | |
128ea8ab | 1628 | |
d62a17ae | 1629 | delete_evpn_route_entry(bgp, vpn, afi, safi, rn, &ri); |
1630 | if (ri) | |
1631 | bgp_process(bgp, rn, afi, safi); | |
1632 | } | |
1633 | } | |
128ea8ab | 1634 | |
d62a17ae | 1635 | /* Unlock RD node. */ |
1636 | if (rdrn) | |
1637 | bgp_unlock_node(rdrn); | |
128ea8ab | 1638 | |
d62a17ae | 1639 | return 0; |
128ea8ab | 1640 | } |
1641 | ||
1642 | /* | |
1643 | * Delete all type-2 (MACIP) local routes for this VNI - from the global | |
1644 | * table as well as the per-VNI route table. | |
1645 | */ | |
d62a17ae | 1646 | static int delete_all_type2_routes(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1647 | { |
d62a17ae | 1648 | afi_t afi; |
1649 | safi_t safi; | |
1650 | struct bgp_node *rn; | |
1651 | struct bgp_info *ri; | |
128ea8ab | 1652 | |
d62a17ae | 1653 | afi = AFI_L2VPN; |
1654 | safi = SAFI_EVPN; | |
128ea8ab | 1655 | |
d62a17ae | 1656 | /* First, walk the global route table for this VNI's type-2 local |
1657 | * routes. | |
1658 | * EVPN routes are a 2-level table, first get the RD table. | |
1659 | */ | |
1660 | delete_global_type2_routes(bgp, vpn); | |
128ea8ab | 1661 | |
d62a17ae | 1662 | /* Next, walk this VNI's route table and delete local type-2 routes. */ |
1663 | for (rn = bgp_table_top(vpn->route_table); rn; | |
1664 | rn = bgp_route_next(rn)) { | |
1665 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
128ea8ab | 1666 | |
d62a17ae | 1667 | if (evp->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE) |
1668 | continue; | |
128ea8ab | 1669 | |
d62a17ae | 1670 | delete_evpn_route_entry(bgp, vpn, afi, safi, rn, &ri); |
128ea8ab | 1671 | |
d62a17ae | 1672 | /* Route entry in local table gets deleted immediately. */ |
1673 | if (ri) | |
1674 | bgp_info_reap(rn, ri); | |
1675 | } | |
128ea8ab | 1676 | |
d62a17ae | 1677 | return 0; |
128ea8ab | 1678 | } |
1679 | ||
1680 | /* | |
1681 | * Delete all routes in the per-VNI route table. | |
1682 | */ | |
d62a17ae | 1683 | static int delete_all_vni_routes(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1684 | { |
d62a17ae | 1685 | struct bgp_node *rn; |
1686 | struct bgp_info *ri, *nextri; | |
128ea8ab | 1687 | |
d62a17ae | 1688 | /* Walk this VNI's route table and delete all routes. */ |
1689 | for (rn = bgp_table_top(vpn->route_table); rn; | |
1690 | rn = bgp_route_next(rn)) { | |
1691 | for (ri = rn->info; (ri != NULL) && (nextri = ri->next, 1); | |
1692 | ri = nextri) { | |
1693 | bgp_info_delete(rn, ri); | |
1694 | bgp_info_reap(rn, ri); | |
1695 | } | |
1696 | } | |
128ea8ab | 1697 | |
d62a17ae | 1698 | return 0; |
128ea8ab | 1699 | } |
1700 | ||
1701 | /* | |
1702 | * Update (and advertise) local routes for a VNI. Invoked upon the VNI | |
1703 | * export RT getting modified or change to tunnel IP. Note that these | |
1704 | * situations need the route in the per-VNI table as well as the global | |
1705 | * table to be updated (as attributes change). | |
1706 | */ | |
d62a17ae | 1707 | static int update_routes_for_vni(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1708 | { |
d62a17ae | 1709 | int ret; |
1710 | struct prefix_evpn p; | |
128ea8ab | 1711 | |
d62a17ae | 1712 | /* Update and advertise the type-3 route (only one) followed by the |
1713 | * locally learnt type-2 routes (MACIP) - for this VNI. | |
1714 | */ | |
1715 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
1716 | ret = update_evpn_route(bgp, vpn, &p, 0); | |
1717 | if (ret) | |
1718 | return ret; | |
128ea8ab | 1719 | |
d62a17ae | 1720 | return update_all_type2_routes(bgp, vpn); |
128ea8ab | 1721 | } |
1722 | ||
1723 | /* | |
1724 | * Delete (and withdraw) local routes for specified VNI from the global | |
1725 | * table and per-VNI table. After this, remove all other routes from | |
1726 | * the per-VNI table. Invoked upon the VNI being deleted or EVPN | |
1727 | * (advertise-all-vni) being disabled. | |
1728 | */ | |
d62a17ae | 1729 | static int delete_routes_for_vni(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1730 | { |
d62a17ae | 1731 | int ret; |
1732 | struct prefix_evpn p; | |
128ea8ab | 1733 | |
d62a17ae | 1734 | /* Delete and withdraw locally learnt type-2 routes (MACIP) |
1735 | * followed by type-3 routes (only one) - for this VNI. | |
1736 | */ | |
1737 | ret = delete_all_type2_routes(bgp, vpn); | |
1738 | if (ret) | |
1739 | return ret; | |
128ea8ab | 1740 | |
d62a17ae | 1741 | build_evpn_type3_prefix(&p, vpn->originator_ip); |
1742 | ret = delete_evpn_route(bgp, vpn, &p); | |
1743 | if (ret) | |
1744 | return ret; | |
128ea8ab | 1745 | |
d62a17ae | 1746 | /* Delete all routes from the per-VNI table. */ |
1747 | return delete_all_vni_routes(bgp, vpn); | |
128ea8ab | 1748 | } |
1749 | ||
1750 | /* | |
d1911c26 | 1751 | * There is a tunnel endpoint IP address change for this VNI, delete |
1752 | * prior type-3 route (if needed) and update. | |
1753 | * Note: Route re-advertisement happens elsewhere after other processing | |
1754 | * other changes. | |
128ea8ab | 1755 | */ |
d62a17ae | 1756 | static int handle_tunnel_ip_change(struct bgp *bgp, struct bgpevpn *vpn, |
1757 | struct in_addr originator_ip) | |
128ea8ab | 1758 | { |
d62a17ae | 1759 | struct prefix_evpn p; |
128ea8ab | 1760 | |
ddd16ed5 MK |
1761 | /* If VNI is not live, we only need to update the originator ip */ |
1762 | if (!is_vni_live(vpn)) { | |
1763 | vpn->originator_ip = originator_ip; | |
1764 | return 0; | |
1765 | } | |
1766 | ||
db0e1937 MK |
1767 | /* Update the tunnel-ip hash */ |
1768 | bgp_tip_del(bgp, &vpn->originator_ip); | |
1769 | bgp_tip_add(bgp, &originator_ip); | |
1770 | ||
1771 | /* filter routes as martian nexthop db has changed */ | |
1772 | bgp_filter_evpn_routes_upon_martian_nh_change(bgp); | |
1773 | ||
d62a17ae | 1774 | /* Need to withdraw type-3 route as the originator IP is part |
1775 | * of the key. | |
1776 | */ | |
1777 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
1778 | delete_evpn_route(bgp, vpn, &p); | |
128ea8ab | 1779 | |
d62a17ae | 1780 | /* Update the tunnel IP and re-advertise all routes for this VNI. */ |
1781 | vpn->originator_ip = originator_ip; | |
d1911c26 | 1782 | return 0; |
128ea8ab | 1783 | } |
1784 | ||
d3135ba3 | 1785 | /* |
1786 | * Install route entry into the VRF routing table and invoke route selection. | |
1787 | */ | |
1788 | static int install_evpn_route_entry_in_vrf(struct bgp *bgp_vrf, | |
1789 | struct prefix_evpn *evp, | |
1790 | struct bgp_info *parent_ri) | |
1791 | { | |
1792 | struct bgp_node *rn; | |
1793 | struct bgp_info *ri; | |
1794 | struct attr *attr_new; | |
c4edf708 | 1795 | int ret = 0; |
d3135ba3 | 1796 | struct prefix p; |
1797 | struct prefix *pp = &p; | |
1798 | afi_t afi = 0; | |
1799 | safi_t safi = 0; | |
1eb88002 MK |
1800 | char buf[PREFIX_STRLEN]; |
1801 | char buf1[PREFIX_STRLEN]; | |
d3135ba3 | 1802 | |
1803 | memset(pp, 0, sizeof(struct prefix)); | |
90264d64 MK |
1804 | if (evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) |
1805 | ip_prefix_from_type2_prefix(evp, pp); | |
523cafc4 | 1806 | else if (evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE) |
90264d64 | 1807 | ip_prefix_from_type5_prefix(evp, pp); |
d3135ba3 | 1808 | |
1eb88002 | 1809 | if (bgp_debug_zebra(NULL)) { |
996c9314 LB |
1810 | zlog_debug( |
1811 | "installing evpn prefix %s as ip prefix %s in vrf %s", | |
1812 | prefix2str(evp, buf, sizeof(buf)), | |
1813 | prefix2str(pp, buf1, sizeof(buf)), | |
1814 | vrf_id_to_name(bgp_vrf->vrf_id)); | |
1eb88002 MK |
1815 | } |
1816 | ||
d3135ba3 | 1817 | /* Create (or fetch) route within the VRF. */ |
1818 | /* NOTE: There is no RD here. */ | |
1819 | if (IS_EVPN_PREFIX_IPADDR_V4(evp)) { | |
1820 | afi = AFI_IP; | |
1821 | safi = SAFI_UNICAST; | |
1822 | rn = bgp_node_get(bgp_vrf->rib[afi][safi], pp); | |
1823 | } else if (IS_EVPN_PREFIX_IPADDR_V6(evp)) { | |
1824 | afi = AFI_IP6; | |
1825 | safi = SAFI_UNICAST; | |
1826 | rn = bgp_node_get(bgp_vrf->rib[afi][safi], pp); | |
1827 | } else | |
1828 | return 0; | |
1829 | ||
1830 | /* Check if route entry is already present. */ | |
1831 | for (ri = rn->info; ri; ri = ri->next) | |
1832 | if (ri->extra | |
1833 | && (struct bgp_info *)ri->extra->parent == parent_ri) | |
1834 | break; | |
1835 | ||
1836 | if (!ri) { | |
1837 | /* Add (or update) attribute to hash. */ | |
1838 | attr_new = bgp_attr_intern(parent_ri->attr); | |
1839 | ||
1840 | /* Create new route with its attribute. */ | |
1841 | ri = info_make(parent_ri->type, parent_ri->sub_type, 0, | |
1842 | parent_ri->peer, attr_new, rn); | |
1843 | SET_FLAG(ri->flags, BGP_INFO_VALID); | |
1844 | bgp_info_extra_get(ri); | |
1845 | ri->extra->parent = parent_ri; | |
b57ba6d2 | 1846 | if (parent_ri->extra) { |
d3135ba3 | 1847 | memcpy(&ri->extra->label, &parent_ri->extra->label, |
b57ba6d2 MK |
1848 | sizeof(ri->extra->label)); |
1849 | ri->extra->num_labels = parent_ri->extra->num_labels; | |
1850 | } | |
d3135ba3 | 1851 | bgp_info_add(rn, ri); |
1852 | } else { | |
1853 | if (attrhash_cmp(ri->attr, parent_ri->attr) | |
1854 | && !CHECK_FLAG(ri->flags, BGP_INFO_REMOVED)) { | |
1855 | bgp_unlock_node(rn); | |
1856 | return 0; | |
1857 | } | |
1858 | /* The attribute has changed. */ | |
1859 | /* Add (or update) attribute to hash. */ | |
1860 | attr_new = bgp_attr_intern(parent_ri->attr); | |
1861 | ||
1862 | /* Restore route, if needed. */ | |
1863 | if (CHECK_FLAG(ri->flags, BGP_INFO_REMOVED)) | |
1864 | bgp_info_restore(rn, ri); | |
1865 | ||
1866 | /* Mark if nexthop has changed. */ | |
1867 | if (!IPV4_ADDR_SAME(&ri->attr->nexthop, &attr_new->nexthop)) | |
1868 | SET_FLAG(ri->flags, BGP_INFO_IGP_CHANGED); | |
1869 | ||
1870 | /* Unintern existing, set to new. */ | |
1871 | bgp_attr_unintern(&ri->attr); | |
1872 | ri->attr = attr_new; | |
1873 | ri->uptime = bgp_clock(); | |
1874 | } | |
1875 | ||
1876 | /* Perform route selection and update zebra, if required. */ | |
1eb88002 | 1877 | bgp_process(bgp_vrf, rn, afi, safi); |
d3135ba3 | 1878 | |
1879 | return ret; | |
1880 | } | |
1881 | ||
128ea8ab | 1882 | /* |
1883 | * Install route entry into the VNI routing table and invoke route selection. | |
1884 | */ | |
d62a17ae | 1885 | static int install_evpn_route_entry(struct bgp *bgp, struct bgpevpn *vpn, |
1886 | struct prefix_evpn *p, | |
1887 | struct bgp_info *parent_ri) | |
1888 | { | |
1889 | struct bgp_node *rn; | |
1890 | struct bgp_info *ri; | |
1891 | struct attr *attr_new; | |
1892 | int ret; | |
1893 | ||
1894 | /* Create (or fetch) route within the VNI. */ | |
1895 | /* NOTE: There is no RD here. */ | |
1896 | rn = bgp_node_get(vpn->route_table, (struct prefix *)p); | |
1897 | ||
1898 | /* Check if route entry is already present. */ | |
1899 | for (ri = rn->info; ri; ri = ri->next) | |
1900 | if (ri->extra | |
1901 | && (struct bgp_info *)ri->extra->parent == parent_ri) | |
1902 | break; | |
1903 | ||
1904 | if (!ri) { | |
1905 | /* Add (or update) attribute to hash. */ | |
1906 | attr_new = bgp_attr_intern(parent_ri->attr); | |
1907 | ||
1908 | /* Create new route with its attribute. */ | |
1909 | ri = info_make(parent_ri->type, parent_ri->sub_type, 0, | |
1910 | parent_ri->peer, attr_new, rn); | |
1911 | SET_FLAG(ri->flags, BGP_INFO_VALID); | |
1912 | bgp_info_extra_get(ri); | |
1913 | ri->extra->parent = parent_ri; | |
b57ba6d2 | 1914 | if (parent_ri->extra) { |
d62a17ae | 1915 | memcpy(&ri->extra->label, &parent_ri->extra->label, |
b57ba6d2 MK |
1916 | sizeof(ri->extra->label)); |
1917 | ri->extra->num_labels = parent_ri->extra->num_labels; | |
1918 | } | |
d62a17ae | 1919 | bgp_info_add(rn, ri); |
1920 | } else { | |
1921 | if (attrhash_cmp(ri->attr, parent_ri->attr) | |
1922 | && !CHECK_FLAG(ri->flags, BGP_INFO_REMOVED)) { | |
1923 | bgp_unlock_node(rn); | |
1924 | return 0; | |
1925 | } | |
1926 | /* The attribute has changed. */ | |
1927 | /* Add (or update) attribute to hash. */ | |
1928 | attr_new = bgp_attr_intern(parent_ri->attr); | |
1929 | ||
1930 | /* Restore route, if needed. */ | |
1931 | if (CHECK_FLAG(ri->flags, BGP_INFO_REMOVED)) | |
1932 | bgp_info_restore(rn, ri); | |
1933 | ||
1934 | /* Mark if nexthop has changed. */ | |
1935 | if (!IPV4_ADDR_SAME(&ri->attr->nexthop, &attr_new->nexthop)) | |
1936 | SET_FLAG(ri->flags, BGP_INFO_IGP_CHANGED); | |
1937 | ||
1938 | /* Unintern existing, set to new. */ | |
1939 | bgp_attr_unintern(&ri->attr); | |
1940 | ri->attr = attr_new; | |
1941 | ri->uptime = bgp_clock(); | |
1942 | } | |
1943 | ||
1944 | /* Perform route selection and update zebra, if required. */ | |
1945 | ret = evpn_route_select_install(bgp, vpn, rn); | |
1946 | ||
1947 | return ret; | |
128ea8ab | 1948 | } |
1949 | ||
d3135ba3 | 1950 | /* |
1951 | * Uninstall route entry from the VRF routing table and send message | |
1952 | * to zebra, if appropriate. | |
1953 | */ | |
1954 | static int uninstall_evpn_route_entry_in_vrf(struct bgp *bgp_vrf, | |
1955 | struct prefix_evpn *evp, | |
1956 | struct bgp_info *parent_ri) | |
1957 | { | |
1958 | struct bgp_node *rn; | |
1959 | struct bgp_info *ri; | |
c4edf708 | 1960 | int ret = 0; |
d3135ba3 | 1961 | struct prefix p; |
1962 | struct prefix *pp = &p; | |
1963 | afi_t afi = 0; | |
1964 | safi_t safi = 0; | |
1eb88002 MK |
1965 | char buf[PREFIX_STRLEN]; |
1966 | char buf1[PREFIX_STRLEN]; | |
d3135ba3 | 1967 | |
1968 | memset(pp, 0, sizeof(struct prefix)); | |
42cb44f2 MK |
1969 | if (evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) |
1970 | ip_prefix_from_type2_prefix(evp, pp); | |
655b04d1 | 1971 | else if (evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE) |
42cb44f2 | 1972 | ip_prefix_from_type5_prefix(evp, pp); |
d3135ba3 | 1973 | |
1eb88002 | 1974 | if (bgp_debug_zebra(NULL)) { |
996c9314 LB |
1975 | zlog_debug( |
1976 | "uninstalling evpn prefix %s as ip prefix %s in vrf %s", | |
1977 | prefix2str(evp, buf, sizeof(buf)), | |
1978 | prefix2str(pp, buf1, sizeof(buf)), | |
1979 | vrf_id_to_name(bgp_vrf->vrf_id)); | |
1eb88002 MK |
1980 | } |
1981 | ||
d3135ba3 | 1982 | /* Locate route within the VRF. */ |
1983 | /* NOTE: There is no RD here. */ | |
1984 | if (IS_EVPN_PREFIX_IPADDR_V4(evp)) { | |
1985 | afi = AFI_IP; | |
1986 | safi = SAFI_UNICAST; | |
1987 | rn = bgp_node_lookup(bgp_vrf->rib[afi][safi], pp); | |
1988 | } else { | |
1989 | afi = AFI_IP6; | |
1990 | safi = SAFI_UNICAST; | |
1991 | rn = bgp_node_lookup(bgp_vrf->rib[afi][safi], pp); | |
1992 | } | |
1993 | ||
1994 | if (!rn) | |
1995 | return 0; | |
1996 | ||
1997 | /* Find matching route entry. */ | |
1998 | for (ri = rn->info; ri; ri = ri->next) | |
1999 | if (ri->extra | |
2000 | && (struct bgp_info *)ri->extra->parent == parent_ri) | |
2001 | break; | |
2002 | ||
2003 | if (!ri) | |
2004 | return 0; | |
2005 | ||
2006 | /* Mark entry for deletion */ | |
2007 | bgp_info_delete(rn, ri); | |
2008 | ||
2009 | /* Perform route selection and update zebra, if required. */ | |
1eb88002 | 2010 | bgp_process(bgp_vrf, rn, afi, safi); |
d3135ba3 | 2011 | |
2012 | /* Unlock route node. */ | |
2013 | bgp_unlock_node(rn); | |
2014 | ||
2015 | return ret; | |
2016 | } | |
2017 | ||
128ea8ab | 2018 | /* |
2019 | * Uninstall route entry from the VNI routing table and send message | |
2020 | * to zebra, if appropriate. | |
2021 | */ | |
d62a17ae | 2022 | static int uninstall_evpn_route_entry(struct bgp *bgp, struct bgpevpn *vpn, |
2023 | struct prefix_evpn *p, | |
2024 | struct bgp_info *parent_ri) | |
128ea8ab | 2025 | { |
d62a17ae | 2026 | struct bgp_node *rn; |
2027 | struct bgp_info *ri; | |
2028 | int ret; | |
128ea8ab | 2029 | |
d62a17ae | 2030 | /* Locate route within the VNI. */ |
2031 | /* NOTE: There is no RD here. */ | |
2032 | rn = bgp_node_lookup(vpn->route_table, (struct prefix *)p); | |
2033 | if (!rn) | |
2034 | return 0; | |
128ea8ab | 2035 | |
d62a17ae | 2036 | /* Find matching route entry. */ |
2037 | for (ri = rn->info; ri; ri = ri->next) | |
2038 | if (ri->extra | |
2039 | && (struct bgp_info *)ri->extra->parent == parent_ri) | |
2040 | break; | |
128ea8ab | 2041 | |
d62a17ae | 2042 | if (!ri) |
2043 | return 0; | |
128ea8ab | 2044 | |
d62a17ae | 2045 | /* Mark entry for deletion */ |
2046 | bgp_info_delete(rn, ri); | |
128ea8ab | 2047 | |
d62a17ae | 2048 | /* Perform route selection and update zebra, if required. */ |
2049 | ret = evpn_route_select_install(bgp, vpn, rn); | |
128ea8ab | 2050 | |
d62a17ae | 2051 | /* Unlock route node. */ |
2052 | bgp_unlock_node(rn); | |
128ea8ab | 2053 | |
d62a17ae | 2054 | return ret; |
128ea8ab | 2055 | } |
2056 | ||
5ba238b7 MK |
2057 | /* |
2058 | * Given a route entry and a VRF, see if this route entry should be | |
2059 | * imported into the VRF i.e., RTs match. | |
2060 | */ | |
996c9314 | 2061 | static int is_route_matching_for_vrf(struct bgp *bgp_vrf, struct bgp_info *ri) |
5ba238b7 MK |
2062 | { |
2063 | struct attr *attr = ri->attr; | |
2064 | struct ecommunity *ecom; | |
2065 | int i; | |
2066 | ||
2067 | assert(attr); | |
2068 | /* Route should have valid RT to be even considered. */ | |
2069 | if (!(attr->flag & ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES))) | |
2070 | return 0; | |
2071 | ||
2072 | ecom = attr->ecommunity; | |
2073 | if (!ecom || !ecom->size) | |
2074 | return 0; | |
2075 | ||
2076 | /* For each extended community RT, see if it matches this VNI. If any RT | |
2077 | * matches, we're done. | |
2078 | */ | |
2079 | for (i = 0; i < ecom->size; i++) { | |
2080 | u_char *pnt; | |
2081 | u_char type, sub_type; | |
2082 | struct ecommunity_val *eval; | |
2083 | struct ecommunity_val eval_tmp; | |
2084 | struct vrf_irt_node *irt; | |
2085 | ||
2086 | /* Only deal with RTs */ | |
2087 | pnt = (ecom->val + (i * ECOMMUNITY_SIZE)); | |
2088 | eval = (struct ecommunity_val *)(ecom->val | |
2089 | + (i * ECOMMUNITY_SIZE)); | |
2090 | type = *pnt++; | |
2091 | sub_type = *pnt++; | |
2092 | if (sub_type != ECOMMUNITY_ROUTE_TARGET) | |
2093 | continue; | |
2094 | ||
2095 | /* See if this RT matches specified VNIs import RTs */ | |
2096 | irt = lookup_vrf_import_rt(eval); | |
2097 | if (irt && irt->vrfs) | |
2098 | if (is_vrf_present_in_irt_vrfs(irt->vrfs, bgp_vrf)) | |
2099 | return 1; | |
2100 | ||
2101 | /* Also check for non-exact match. In this, we mask out the AS | |
2102 | * and | |
2103 | * only check on the local-admin sub-field. This is to | |
2104 | * facilitate using | |
2105 | * VNI as the RT for EBGP peering too. | |
2106 | */ | |
2107 | irt = NULL; | |
2108 | if (type == ECOMMUNITY_ENCODE_AS | |
2109 | || type == ECOMMUNITY_ENCODE_AS4 | |
2110 | || type == ECOMMUNITY_ENCODE_IP) { | |
2111 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
2112 | mask_ecom_global_admin(&eval_tmp, eval); | |
2113 | irt = lookup_vrf_import_rt(&eval_tmp); | |
2114 | } | |
2115 | if (irt && irt->vrfs) | |
2116 | if (is_vrf_present_in_irt_vrfs(irt->vrfs, bgp_vrf)) | |
2117 | return 1; | |
2118 | } | |
2119 | ||
2120 | return 0; | |
2121 | } | |
2122 | ||
128ea8ab | 2123 | /* |
2124 | * Given a route entry and a VNI, see if this route entry should be | |
2125 | * imported into the VNI i.e., RTs match. | |
2126 | */ | |
d62a17ae | 2127 | static int is_route_matching_for_vni(struct bgp *bgp, struct bgpevpn *vpn, |
2128 | struct bgp_info *ri) | |
2129 | { | |
2130 | struct attr *attr = ri->attr; | |
2131 | struct ecommunity *ecom; | |
2132 | int i; | |
2133 | ||
2134 | assert(attr); | |
2135 | /* Route should have valid RT to be even considered. */ | |
2136 | if (!(attr->flag & ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES))) | |
2137 | return 0; | |
2138 | ||
2139 | ecom = attr->ecommunity; | |
2140 | if (!ecom || !ecom->size) | |
2141 | return 0; | |
2142 | ||
2143 | /* For each extended community RT, see if it matches this VNI. If any RT | |
2144 | * matches, we're done. | |
2145 | */ | |
2146 | for (i = 0; i < ecom->size; i++) { | |
2147 | u_char *pnt; | |
2148 | u_char type, sub_type; | |
2149 | struct ecommunity_val *eval; | |
2150 | struct ecommunity_val eval_tmp; | |
2151 | struct irt_node *irt; | |
2152 | ||
2153 | /* Only deal with RTs */ | |
2154 | pnt = (ecom->val + (i * ECOMMUNITY_SIZE)); | |
2155 | eval = (struct ecommunity_val *)(ecom->val | |
2156 | + (i * ECOMMUNITY_SIZE)); | |
2157 | type = *pnt++; | |
2158 | sub_type = *pnt++; | |
2159 | if (sub_type != ECOMMUNITY_ROUTE_TARGET) | |
2160 | continue; | |
2161 | ||
2162 | /* See if this RT matches specified VNIs import RTs */ | |
2163 | irt = lookup_import_rt(bgp, eval); | |
2164 | if (irt && irt->vnis) | |
2165 | if (is_vni_present_in_irt_vnis(irt->vnis, vpn)) | |
2166 | return 1; | |
2167 | ||
2168 | /* Also check for non-exact match. In this, we mask out the AS | |
2169 | * and | |
2170 | * only check on the local-admin sub-field. This is to | |
2171 | * facilitate using | |
2172 | * VNI as the RT for EBGP peering too. | |
2173 | */ | |
2174 | irt = NULL; | |
2175 | if (type == ECOMMUNITY_ENCODE_AS | |
2176 | || type == ECOMMUNITY_ENCODE_AS4 | |
2177 | || type == ECOMMUNITY_ENCODE_IP) { | |
2178 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
2179 | mask_ecom_global_admin(&eval_tmp, eval); | |
2180 | irt = lookup_import_rt(bgp, &eval_tmp); | |
2181 | } | |
2182 | if (irt && irt->vnis) | |
2183 | if (is_vni_present_in_irt_vnis(irt->vnis, vpn)) | |
2184 | return 1; | |
2185 | } | |
2186 | ||
2187 | return 0; | |
128ea8ab | 2188 | } |
2189 | ||
5ba238b7 MK |
2190 | /* |
2191 | * Install or uninstall mac-ip routes are appropriate for this | |
2192 | * particular VRF. | |
2193 | */ | |
996c9314 | 2194 | static int install_uninstall_routes_for_vrf(struct bgp *bgp_vrf, int install) |
5ba238b7 MK |
2195 | { |
2196 | afi_t afi; | |
2197 | safi_t safi; | |
2198 | struct bgp_node *rd_rn, *rn; | |
2199 | struct bgp_table *table; | |
2200 | struct bgp_info *ri; | |
2201 | int ret; | |
2202 | char buf[PREFIX_STRLEN]; | |
2203 | struct bgp *bgp_def = NULL; | |
2204 | ||
2205 | afi = AFI_L2VPN; | |
2206 | safi = SAFI_EVPN; | |
2207 | bgp_def = bgp_get_default(); | |
2208 | if (!bgp_def) | |
2209 | return -1; | |
2210 | ||
2211 | /* Walk entire global routing table and evaluate routes which could be | |
2212 | * imported into this VRF. Note that we need to loop through all global | |
2213 | * routes to determine which route matches the import rt on vrf | |
2214 | */ | |
2215 | for (rd_rn = bgp_table_top(bgp_def->rib[afi][safi]); rd_rn; | |
2216 | rd_rn = bgp_route_next(rd_rn)) { | |
2217 | table = (struct bgp_table *)(rd_rn->info); | |
2218 | if (!table) | |
2219 | continue; | |
2220 | ||
2221 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) { | |
2222 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
2223 | ||
1eb88002 | 2224 | /* if not mac-ip route skip this route */ |
996c9314 LB |
2225 | if (!(evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE |
2226 | || evp->prefix.route_type | |
2227 | == BGP_EVPN_IP_PREFIX_ROUTE)) | |
5ba238b7 MK |
2228 | continue; |
2229 | ||
1eb88002 | 2230 | /* if not a mac+ip route skip this route */ |
996c9314 LB |
2231 | if (!(IS_EVPN_PREFIX_IPADDR_V4(evp) |
2232 | || IS_EVPN_PREFIX_IPADDR_V6(evp))) | |
1eb88002 MK |
2233 | continue; |
2234 | ||
5ba238b7 MK |
2235 | for (ri = rn->info; ri; ri = ri->next) { |
2236 | /* Consider "valid" remote routes applicable for | |
523cafc4 | 2237 | * this VRF. |
2238 | */ | |
5ba238b7 MK |
2239 | if (!(CHECK_FLAG(ri->flags, BGP_INFO_VALID) |
2240 | && ri->type == ZEBRA_ROUTE_BGP | |
2241 | && ri->sub_type == BGP_ROUTE_NORMAL)) | |
2242 | continue; | |
2243 | ||
2244 | if (is_route_matching_for_vrf(bgp_vrf, ri)) { | |
2245 | if (install) | |
996c9314 | 2246 | ret = install_evpn_route_entry_in_vrf( |
5ba238b7 MK |
2247 | bgp_vrf, evp, ri); |
2248 | else | |
996c9314 | 2249 | ret = uninstall_evpn_route_entry_in_vrf( |
5ba238b7 MK |
2250 | bgp_vrf, evp, ri); |
2251 | ||
2252 | if (ret) { | |
2253 | zlog_err( | |
2254 | "Failed to %s EVPN %s route in VRF %s", | |
2255 | install ? "install" | |
2256 | : "uninstall", | |
2257 | prefix2str(evp, buf, | |
2258 | sizeof(buf)), | |
996c9314 LB |
2259 | vrf_id_to_name( |
2260 | bgp_vrf->vrf_id)); | |
5ba238b7 MK |
2261 | return ret; |
2262 | } | |
2263 | } | |
2264 | } | |
2265 | } | |
2266 | } | |
2267 | ||
2268 | return 0; | |
2269 | } | |
2270 | ||
128ea8ab | 2271 | /* |
2272 | * Install or uninstall routes of specified type that are appropriate for this | |
2273 | * particular VNI. | |
2274 | */ | |
d62a17ae | 2275 | static int install_uninstall_routes_for_vni(struct bgp *bgp, |
2276 | struct bgpevpn *vpn, | |
2277 | bgp_evpn_route_type rtype, | |
2278 | int install) | |
2279 | { | |
0291c246 MK |
2280 | afi_t afi; |
2281 | safi_t safi; | |
2282 | struct bgp_node *rd_rn, *rn; | |
2283 | struct bgp_table *table; | |
2284 | struct bgp_info *ri; | |
2285 | int ret; | |
d62a17ae | 2286 | |
2287 | afi = AFI_L2VPN; | |
2288 | safi = SAFI_EVPN; | |
2289 | ||
2290 | /* Walk entire global routing table and evaluate routes which could be | |
2291 | * imported into this VPN. Note that we cannot just look at the routes | |
2292 | * for | |
2293 | * the VNI's RD - remote routes applicable for this VNI could have any | |
2294 | * RD. | |
2295 | */ | |
2296 | /* EVPN routes are a 2-level table. */ | |
2297 | for (rd_rn = bgp_table_top(bgp->rib[afi][safi]); rd_rn; | |
2298 | rd_rn = bgp_route_next(rd_rn)) { | |
2299 | table = (struct bgp_table *)(rd_rn->info); | |
2300 | if (!table) | |
2301 | continue; | |
2302 | ||
2303 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) { | |
2304 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
2305 | ||
2306 | if (evp->prefix.route_type != rtype) | |
2307 | continue; | |
2308 | ||
2309 | for (ri = rn->info; ri; ri = ri->next) { | |
2310 | /* Consider "valid" remote routes applicable for | |
2311 | * this VNI. */ | |
2312 | if (!(CHECK_FLAG(ri->flags, BGP_INFO_VALID) | |
2313 | && ri->type == ZEBRA_ROUTE_BGP | |
2314 | && ri->sub_type == BGP_ROUTE_NORMAL)) | |
2315 | continue; | |
2316 | ||
2317 | if (is_route_matching_for_vni(bgp, vpn, ri)) { | |
2318 | if (install) | |
2319 | ret = install_evpn_route_entry( | |
60466a63 | 2320 | bgp, vpn, evp, ri); |
d62a17ae | 2321 | else |
2322 | ret = uninstall_evpn_route_entry( | |
2323 | bgp, vpn, evp, ri); | |
2324 | ||
2325 | if (ret) { | |
2326 | zlog_err( | |
2327 | "%u: Failed to %s EVPN %s route in VNI %u", | |
2328 | bgp->vrf_id, | |
2329 | install ? "install" | |
2330 | : "uninstall", | |
2331 | rtype == BGP_EVPN_MAC_IP_ROUTE | |
2332 | ? "MACIP" | |
2333 | : "IMET", | |
2334 | vpn->vni); | |
2335 | return ret; | |
2336 | } | |
2337 | } | |
2338 | } | |
2339 | } | |
2340 | } | |
2341 | ||
2342 | return 0; | |
128ea8ab | 2343 | } |
2344 | ||
5ba238b7 | 2345 | /* Install any existing remote routes applicable for this VRF into VRF RIB. This |
523cafc4 | 2346 | * is invoked upon l3vni-add or l3vni import rt change |
2347 | */ | |
5ba238b7 MK |
2348 | static int install_routes_for_vrf(struct bgp *bgp_vrf) |
2349 | { | |
2350 | install_uninstall_routes_for_vrf(bgp_vrf, 1); | |
2351 | return 0; | |
2352 | } | |
2353 | ||
128ea8ab | 2354 | /* |
2355 | * Install any existing remote routes applicable for this VNI into its | |
2356 | * routing table. This is invoked when a VNI becomes "live" or its Import | |
2357 | * RT is changed. | |
2358 | */ | |
d62a17ae | 2359 | static int install_routes_for_vni(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 2360 | { |
d62a17ae | 2361 | int ret; |
128ea8ab | 2362 | |
d62a17ae | 2363 | /* Install type-3 routes followed by type-2 routes - the ones applicable |
2364 | * for this VNI. | |
2365 | */ | |
2366 | ret = install_uninstall_routes_for_vni(bgp, vpn, BGP_EVPN_IMET_ROUTE, | |
2367 | 1); | |
2368 | if (ret) | |
2369 | return ret; | |
128ea8ab | 2370 | |
d62a17ae | 2371 | return install_uninstall_routes_for_vni(bgp, vpn, BGP_EVPN_MAC_IP_ROUTE, |
2372 | 1); | |
128ea8ab | 2373 | } |
2374 | ||
5ba238b7 MK |
2375 | /* uninstall routes from l3vni vrf. */ |
2376 | static int uninstall_routes_for_vrf(struct bgp *bgp_vrf) | |
2377 | { | |
2378 | install_uninstall_routes_for_vrf(bgp_vrf, 0); | |
2379 | return 0; | |
2380 | } | |
2381 | ||
90e60aa7 | 2382 | /* |
2383 | * Uninstall any existing remote routes for this VNI. One scenario in which | |
2384 | * this is invoked is upon an import RT change. | |
2385 | */ | |
d62a17ae | 2386 | static int uninstall_routes_for_vni(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 2387 | { |
d62a17ae | 2388 | int ret; |
90e60aa7 | 2389 | |
d62a17ae | 2390 | /* Uninstall type-2 routes followed by type-3 routes - the ones |
2391 | * applicable | |
2392 | * for this VNI. | |
2393 | */ | |
2394 | ret = install_uninstall_routes_for_vni(bgp, vpn, BGP_EVPN_MAC_IP_ROUTE, | |
2395 | 0); | |
2396 | if (ret) | |
2397 | return ret; | |
90e60aa7 | 2398 | |
d62a17ae | 2399 | return install_uninstall_routes_for_vni(bgp, vpn, BGP_EVPN_IMET_ROUTE, |
2400 | 0); | |
90e60aa7 | 2401 | } |
2402 | ||
d3135ba3 | 2403 | /* |
2404 | * Install or uninstall route in matching VRFs (list). | |
2405 | */ | |
2406 | static int install_uninstall_route_in_vrfs(struct bgp *bgp_def, afi_t afi, | |
2407 | safi_t safi, struct prefix_evpn *evp, | |
2408 | struct bgp_info *ri, | |
2409 | struct list *vrfs, int install) | |
2410 | { | |
2411 | char buf[PREFIX2STR_BUFFER]; | |
2412 | struct bgp *bgp_vrf; | |
2413 | struct listnode *node, *nnode; | |
2414 | ||
90264d64 | 2415 | /* Only type-2/type-5 routes go into a VRF */ |
996c9314 LB |
2416 | if (!(evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE |
2417 | || evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE)) | |
d3135ba3 | 2418 | return 0; |
2419 | ||
90264d64 | 2420 | /* if it is type-2 route and not a mac+ip route skip this route */ |
996c9314 LB |
2421 | if ((evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) |
2422 | && !(IS_EVPN_PREFIX_IPADDR_V4(evp) | |
2423 | || IS_EVPN_PREFIX_IPADDR_V6(evp))) | |
30a30f57 MK |
2424 | return 0; |
2425 | ||
d3135ba3 | 2426 | for (ALL_LIST_ELEMENTS(vrfs, node, nnode, bgp_vrf)) { |
2427 | int ret; | |
2428 | ||
2429 | if (install) | |
996c9314 | 2430 | ret = install_evpn_route_entry_in_vrf(bgp_vrf, evp, ri); |
d3135ba3 | 2431 | else |
996c9314 LB |
2432 | ret = uninstall_evpn_route_entry_in_vrf(bgp_vrf, evp, |
2433 | ri); | |
d3135ba3 | 2434 | |
2435 | if (ret) { | |
2436 | zlog_err("%u: Failed to %s prefix %s in VRF %s", | |
2437 | bgp_def->vrf_id, | |
2438 | install ? "install" : "uninstall", | |
2439 | prefix2str(evp, buf, sizeof(buf)), | |
2440 | vrf_id_to_name(bgp_vrf->vrf_id)); | |
2441 | return ret; | |
2442 | } | |
2443 | } | |
2444 | ||
2445 | return 0; | |
2446 | } | |
2447 | ||
128ea8ab | 2448 | /* |
2449 | * Install or uninstall route in matching VNIs (list). | |
2450 | */ | |
d62a17ae | 2451 | static int install_uninstall_route_in_vnis(struct bgp *bgp, afi_t afi, |
2452 | safi_t safi, struct prefix_evpn *evp, | |
2453 | struct bgp_info *ri, | |
2454 | struct list *vnis, int install) | |
128ea8ab | 2455 | { |
d62a17ae | 2456 | struct bgpevpn *vpn; |
2457 | struct listnode *node, *nnode; | |
128ea8ab | 2458 | |
d62a17ae | 2459 | for (ALL_LIST_ELEMENTS(vnis, node, nnode, vpn)) { |
2460 | int ret; | |
128ea8ab | 2461 | |
d62a17ae | 2462 | if (!is_vni_live(vpn)) |
2463 | continue; | |
128ea8ab | 2464 | |
d62a17ae | 2465 | if (install) |
2466 | ret = install_evpn_route_entry(bgp, vpn, evp, ri); | |
2467 | else | |
2468 | ret = uninstall_evpn_route_entry(bgp, vpn, evp, ri); | |
128ea8ab | 2469 | |
d62a17ae | 2470 | if (ret) { |
2471 | zlog_err("%u: Failed to %s EVPN %s route in VNI %u", | |
2472 | bgp->vrf_id, install ? "install" : "uninstall", | |
2473 | evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE | |
2474 | ? "MACIP" | |
2475 | : "IMET", | |
2476 | vpn->vni); | |
2477 | return ret; | |
2478 | } | |
2479 | } | |
128ea8ab | 2480 | |
d62a17ae | 2481 | return 0; |
128ea8ab | 2482 | } |
2483 | ||
2484 | /* | |
2485 | * Install or uninstall route for appropriate VNIs. | |
2486 | */ | |
d62a17ae | 2487 | static int install_uninstall_evpn_route(struct bgp *bgp, afi_t afi, safi_t safi, |
2488 | struct prefix *p, struct bgp_info *ri, | |
2489 | int import) | |
2490 | { | |
2491 | struct prefix_evpn *evp = (struct prefix_evpn *)p; | |
2492 | struct attr *attr = ri->attr; | |
2493 | struct ecommunity *ecom; | |
2494 | int i; | |
2495 | ||
2496 | assert(attr); | |
2497 | ||
90264d64 | 2498 | /* Only type-2 and type-3 and type-5 are supported currently */ |
d62a17ae | 2499 | if (!(evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE |
90264d64 MK |
2500 | || evp->prefix.route_type == BGP_EVPN_IMET_ROUTE |
2501 | || evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE)) | |
d62a17ae | 2502 | return 0; |
2503 | ||
2504 | /* If we don't have Route Target, nothing much to do. */ | |
2505 | if (!(attr->flag & ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES))) | |
2506 | return 0; | |
2507 | ||
2508 | ecom = attr->ecommunity; | |
2509 | if (!ecom || !ecom->size) | |
2510 | return -1; | |
2511 | ||
90264d64 MK |
2512 | /* For each extended community RT, see which VNIs/VRFs match and import |
2513 | * the route into matching VNIs/VRFs. | |
d62a17ae | 2514 | */ |
2515 | for (i = 0; i < ecom->size; i++) { | |
2516 | u_char *pnt; | |
2517 | u_char type, sub_type; | |
2518 | struct ecommunity_val *eval; | |
2519 | struct ecommunity_val eval_tmp; | |
996c9314 | 2520 | struct irt_node *irt; /* import rt for l2vni */ |
d3135ba3 | 2521 | struct vrf_irt_node *vrf_irt; /* import rt for l3vni */ |
d62a17ae | 2522 | |
2523 | /* Only deal with RTs */ | |
2524 | pnt = (ecom->val + (i * ECOMMUNITY_SIZE)); | |
2525 | eval = (struct ecommunity_val *)(ecom->val | |
2526 | + (i * ECOMMUNITY_SIZE)); | |
2527 | type = *pnt++; | |
2528 | sub_type = *pnt++; | |
2529 | if (sub_type != ECOMMUNITY_ROUTE_TARGET) | |
2530 | continue; | |
2531 | ||
90264d64 | 2532 | /* Import route into matching l2-vnis (type-2/type-3 routes go |
523cafc4 | 2533 | * into l2vni table) |
2534 | */ | |
d62a17ae | 2535 | irt = lookup_import_rt(bgp, eval); |
2536 | if (irt && irt->vnis) | |
2537 | install_uninstall_route_in_vnis(bgp, afi, safi, evp, ri, | |
2538 | irt->vnis, import); | |
2539 | ||
90264d64 | 2540 | /* Import route into matching l3-vnis (type-2/type-5 routes go |
523cafc4 | 2541 | * into l3vni/vrf table) |
2542 | */ | |
d3135ba3 | 2543 | vrf_irt = lookup_vrf_import_rt(eval); |
2544 | if (vrf_irt && vrf_irt->vrfs) | |
2545 | install_uninstall_route_in_vrfs(bgp, afi, safi, evp, ri, | |
2546 | vrf_irt->vrfs, import); | |
2547 | ||
90264d64 MK |
2548 | /* Also check for non-exact match. In this, |
2549 | * we mask out the AS and | |
2550 | * only check on the local-admin sub-field. | |
2551 | * This is to facilitate using | |
d62a17ae | 2552 | * VNI as the RT for EBGP peering too. |
2553 | */ | |
2554 | irt = NULL; | |
d3135ba3 | 2555 | vrf_irt = NULL; |
d62a17ae | 2556 | if (type == ECOMMUNITY_ENCODE_AS |
2557 | || type == ECOMMUNITY_ENCODE_AS4 | |
2558 | || type == ECOMMUNITY_ENCODE_IP) { | |
2559 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
2560 | mask_ecom_global_admin(&eval_tmp, eval); | |
2561 | irt = lookup_import_rt(bgp, &eval_tmp); | |
d3135ba3 | 2562 | vrf_irt = lookup_vrf_import_rt(&eval_tmp); |
d62a17ae | 2563 | } |
2564 | if (irt && irt->vnis) | |
2565 | install_uninstall_route_in_vnis(bgp, afi, safi, evp, ri, | |
2566 | irt->vnis, import); | |
d3135ba3 | 2567 | if (vrf_irt && vrf_irt->vrfs) |
996c9314 LB |
2568 | install_uninstall_route_in_vrfs(bgp, afi, safi, evp, ri, |
2569 | vrf_irt->vrfs, import); | |
d62a17ae | 2570 | } |
2571 | ||
2572 | return 0; | |
128ea8ab | 2573 | } |
2574 | ||
80b140af MK |
2575 | /* delete and withdraw all ipv4 and ipv6 routes in the vrf table as type-5 |
2576 | * routes */ | |
2577 | static void delete_withdraw_vrf_routes(struct bgp *bgp_vrf) | |
2578 | { | |
2579 | /* delete all ipv4 routes and withdraw from peers */ | |
053905d2 | 2580 | bgp_evpn_withdraw_type5_routes(bgp_vrf, AFI_IP, SAFI_UNICAST); |
80b140af MK |
2581 | |
2582 | /* delete all ipv6 routes and withdraw from peers */ | |
053905d2 | 2583 | bgp_evpn_withdraw_type5_routes(bgp_vrf, AFI_IP6, SAFI_UNICAST); |
80b140af MK |
2584 | } |
2585 | ||
2586 | /* update and advertise all ipv4 and ipv6 routes in thr vrf table as type-5 | |
2587 | * routes */ | |
2588 | static void update_advertise_vrf_routes(struct bgp *bgp_vrf) | |
2589 | { | |
2590 | /* update all ipv4 routes */ | |
053905d2 | 2591 | bgp_evpn_advertise_type5_routes(bgp_vrf, AFI_IP, SAFI_UNICAST); |
80b140af MK |
2592 | |
2593 | /* update all ipv6 routes */ | |
053905d2 | 2594 | bgp_evpn_advertise_type5_routes(bgp_vrf, AFI_IP6, SAFI_UNICAST); |
80b140af MK |
2595 | } |
2596 | ||
676f83b9 | 2597 | /* |
2598 | * update and advertise local routes for a VRF as type-5 routes. | |
2599 | * This is invoked upon RD change for a VRF. Note taht the processing is only | |
2600 | * done in the global route table using the routes which already exist in the | |
2601 | * VRF routing table | |
2602 | */ | |
80b140af | 2603 | static void update_router_id_vrf(struct bgp *bgp_vrf) |
676f83b9 | 2604 | { |
80b140af MK |
2605 | /* skip if the RD is configured */ |
2606 | if (is_vrf_rd_configured(bgp_vrf)) | |
2607 | return; | |
2608 | ||
2609 | /* derive the RD for the VRF based on new router-id */ | |
2610 | bgp_evpn_derive_auto_rd_for_vrf(bgp_vrf); | |
2611 | ||
2612 | /* update advertise ipv4|ipv6 routes as type-5 routes */ | |
2613 | update_advertise_vrf_routes(bgp_vrf); | |
676f83b9 | 2614 | } |
2615 | ||
2616 | /* | |
2617 | * Delete and withdraw all type-5 routes for the RD corresponding to VRF. | |
2618 | * This is invoked upon VRF RD change. The processing is done only from global | |
2619 | * table. | |
2620 | */ | |
80b140af | 2621 | static void withdraw_router_id_vrf(struct bgp *bgp_vrf) |
676f83b9 | 2622 | { |
80b140af MK |
2623 | /* skip if the RD is configured */ |
2624 | if (is_vrf_rd_configured(bgp_vrf)) | |
2625 | return; | |
2626 | ||
2627 | /* delete/withdraw ipv4|ipv6 routes as type-5 routes */ | |
2628 | delete_withdraw_vrf_routes(bgp_vrf); | |
676f83b9 | 2629 | } |
2630 | ||
90e60aa7 | 2631 | /* |
2632 | * Update and advertise local routes for a VNI. Invoked upon router-id | |
2633 | * change. Note that the processing is done only on the global route table | |
2634 | * using routes that already exist in the per-VNI table. | |
2635 | */ | |
d62a17ae | 2636 | static int update_advertise_vni_routes(struct bgp *bgp, struct bgpevpn *vpn) |
2637 | { | |
2638 | struct prefix_evpn p; | |
2639 | struct bgp_node *rn, *global_rn; | |
2640 | struct bgp_info *ri, *global_ri; | |
2641 | struct attr *attr; | |
2642 | afi_t afi = AFI_L2VPN; | |
2643 | safi_t safi = SAFI_EVPN; | |
2644 | ||
2645 | /* Locate type-3 route for VNI in the per-VNI table and use its | |
2646 | * attributes to create and advertise the type-3 route for this VNI | |
2647 | * in the global table. | |
2648 | */ | |
2649 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
2650 | rn = bgp_node_lookup(vpn->route_table, (struct prefix *)&p); | |
2651 | if (!rn) /* unexpected */ | |
2652 | return 0; | |
2653 | for (ri = rn->info; ri; ri = ri->next) | |
2654 | if (ri->peer == bgp->peer_self && ri->type == ZEBRA_ROUTE_BGP | |
2655 | && ri->sub_type == BGP_ROUTE_STATIC) | |
2656 | break; | |
2657 | if (!ri) /* unexpected */ | |
2658 | return 0; | |
2659 | attr = ri->attr; | |
2660 | ||
2661 | global_rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, | |
2662 | (struct prefix *)&p, &vpn->prd); | |
1a98c087 MK |
2663 | update_evpn_route_entry(bgp, vpn, afi, safi, global_rn, attr, 1, 0, &ri, |
2664 | 0); | |
d62a17ae | 2665 | |
2666 | /* Schedule for processing and unlock node. */ | |
2667 | bgp_process(bgp, global_rn, afi, safi); | |
2668 | bgp_unlock_node(global_rn); | |
2669 | ||
2670 | /* Now, walk this VNI's route table and use the route and its attribute | |
2671 | * to create and schedule route in global table. | |
2672 | */ | |
2673 | for (rn = bgp_table_top(vpn->route_table); rn; | |
2674 | rn = bgp_route_next(rn)) { | |
2675 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
2676 | ||
2677 | /* Identify MAC-IP local routes. */ | |
2678 | if (evp->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE) | |
2679 | continue; | |
2680 | ||
2681 | for (ri = rn->info; ri; ri = ri->next) | |
2682 | if (ri->peer == bgp->peer_self | |
2683 | && ri->type == ZEBRA_ROUTE_BGP | |
2684 | && ri->sub_type == BGP_ROUTE_STATIC) | |
2685 | break; | |
2686 | if (!ri) | |
2687 | continue; | |
2688 | ||
2689 | /* Create route in global routing table using this route entry's | |
2690 | * attribute. | |
2691 | */ | |
2692 | attr = ri->attr; | |
2693 | global_rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, | |
2694 | (struct prefix *)evp, &vpn->prd); | |
2695 | assert(global_rn); | |
2696 | update_evpn_route_entry(bgp, vpn, afi, safi, global_rn, attr, 1, | |
1a98c087 | 2697 | 0, &global_ri, 0); |
d62a17ae | 2698 | |
2699 | /* Schedule for processing and unlock node. */ | |
2700 | bgp_process(bgp, global_rn, afi, safi); | |
2701 | bgp_unlock_node(global_rn); | |
2702 | } | |
2703 | ||
2704 | return 0; | |
90e60aa7 | 2705 | } |
2706 | ||
2707 | /* | |
2708 | * Delete (and withdraw) local routes for a VNI - only from the global | |
2709 | * table. Invoked upon router-id change. | |
2710 | */ | |
d62a17ae | 2711 | static int delete_withdraw_vni_routes(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 2712 | { |
d62a17ae | 2713 | int ret; |
2714 | struct prefix_evpn p; | |
2715 | struct bgp_node *global_rn; | |
2716 | struct bgp_info *ri; | |
2717 | afi_t afi = AFI_L2VPN; | |
2718 | safi_t safi = SAFI_EVPN; | |
90e60aa7 | 2719 | |
d62a17ae | 2720 | /* Delete and withdraw locally learnt type-2 routes (MACIP) |
2721 | * for this VNI - from the global table. | |
2722 | */ | |
2723 | ret = delete_global_type2_routes(bgp, vpn); | |
2724 | if (ret) | |
2725 | return ret; | |
90e60aa7 | 2726 | |
d62a17ae | 2727 | /* Remove type-3 route for this VNI from global table. */ |
2728 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
2729 | global_rn = bgp_afi_node_lookup(bgp->rib[afi][safi], afi, safi, | |
2730 | (struct prefix *)&p, &vpn->prd); | |
2731 | if (global_rn) { | |
2732 | /* Delete route entry in the global EVPN table. */ | |
2733 | delete_evpn_route_entry(bgp, vpn, afi, safi, global_rn, &ri); | |
90e60aa7 | 2734 | |
d62a17ae | 2735 | /* Schedule for processing - withdraws to peers happen from |
2736 | * this table. | |
2737 | */ | |
2738 | if (ri) | |
2739 | bgp_process(bgp, global_rn, afi, safi); | |
2740 | bgp_unlock_node(global_rn); | |
2741 | } | |
90e60aa7 | 2742 | |
d62a17ae | 2743 | return 0; |
90e60aa7 | 2744 | } |
2745 | ||
2d48ee25 | 2746 | /* |
2747 | * Handle router-id change. Update and advertise local routes corresponding | |
2748 | * to this VNI from peers. Note that this is invoked after updating the | |
2749 | * router-id. The routes in the per-VNI table are used to create routes in | |
2750 | * the global table and schedule them. | |
2751 | */ | |
d62a17ae | 2752 | static void update_router_id_vni(struct hash_backet *backet, struct bgp *bgp) |
2d48ee25 | 2753 | { |
d62a17ae | 2754 | struct bgpevpn *vpn; |
2d48ee25 | 2755 | |
d62a17ae | 2756 | vpn = (struct bgpevpn *)backet->data; |
2d48ee25 | 2757 | |
d62a17ae | 2758 | if (!vpn) { |
2759 | zlog_warn("%s: VNI hash entry for VNI not found", __FUNCTION__); | |
2760 | return; | |
2761 | } | |
2d48ee25 | 2762 | |
d62a17ae | 2763 | /* Skip VNIs with configured RD. */ |
2764 | if (is_rd_configured(vpn)) | |
2765 | return; | |
2d48ee25 | 2766 | |
d62a17ae | 2767 | bgp_evpn_derive_auto_rd(bgp, vpn); |
2768 | update_advertise_vni_routes(bgp, vpn); | |
2d48ee25 | 2769 | } |
2770 | ||
2771 | /* | |
2772 | * Handle router-id change. Delete and withdraw local routes corresponding | |
2773 | * to this VNI from peers. Note that this is invoked prior to updating | |
2774 | * the router-id and is done only on the global route table, the routes | |
2775 | * are needed in the per-VNI table to re-advertise with new router id. | |
2776 | */ | |
d62a17ae | 2777 | static void withdraw_router_id_vni(struct hash_backet *backet, struct bgp *bgp) |
2d48ee25 | 2778 | { |
d62a17ae | 2779 | struct bgpevpn *vpn; |
2d48ee25 | 2780 | |
d62a17ae | 2781 | vpn = (struct bgpevpn *)backet->data; |
2d48ee25 | 2782 | |
d62a17ae | 2783 | if (!vpn) { |
2784 | zlog_warn("%s: VNI hash entry for VNI not found", __FUNCTION__); | |
2785 | return; | |
2786 | } | |
2d48ee25 | 2787 | |
d62a17ae | 2788 | /* Skip VNIs with configured RD. */ |
2789 | if (is_rd_configured(vpn)) | |
2790 | return; | |
2d48ee25 | 2791 | |
d62a17ae | 2792 | delete_withdraw_vni_routes(bgp, vpn); |
2d48ee25 | 2793 | } |
2794 | ||
128ea8ab | 2795 | /* |
2796 | * Process received EVPN type-2 route (advertise or withdraw). | |
2797 | */ | |
d62a17ae | 2798 | static int process_type2_route(struct peer *peer, afi_t afi, safi_t safi, |
2799 | struct attr *attr, u_char *pfx, int psize, | |
2800 | u_int32_t addpath_id) | |
2801 | { | |
2802 | struct prefix_rd prd; | |
2803 | struct prefix_evpn p; | |
2804 | u_char ipaddr_len; | |
2805 | u_char macaddr_len; | |
b57ba6d2 MK |
2806 | mpls_label_t label[BGP_MAX_LABELS]; /* holds the VNI(s) as in packet */ |
2807 | u_int32_t num_labels = 0; | |
d62a17ae | 2808 | int ret; |
2809 | ||
2810 | /* Type-2 route should be either 33, 37 or 49 bytes or an | |
2811 | * additional 3 bytes if there is a second label (VNI): | |
2812 | * RD (8), ESI (10), Eth Tag (4), MAC Addr Len (1), | |
2813 | * MAC Addr (6), IP len (1), IP (0, 4 or 16), | |
2814 | * MPLS Lbl1 (3), MPLS Lbl2 (0 or 3) | |
2815 | */ | |
2816 | if (psize != 33 && psize != 37 && psize != 49 && psize != 36 | |
2817 | && psize != 40 && psize != 52) { | |
2818 | zlog_err("%u:%s - Rx EVPN Type-2 NLRI with invalid length %d", | |
2819 | peer->bgp->vrf_id, peer->host, psize); | |
2820 | return -1; | |
2821 | } | |
2822 | ||
2823 | /* Make prefix_rd */ | |
2824 | prd.family = AF_UNSPEC; | |
2825 | prd.prefixlen = 64; | |
2826 | memcpy(&prd.val, pfx, 8); | |
2827 | pfx += 8; | |
2828 | ||
2829 | /* Make EVPN prefix. */ | |
2830 | memset(&p, 0, sizeof(struct prefix_evpn)); | |
b03b8898 | 2831 | p.family = AF_EVPN; |
d62a17ae | 2832 | p.prefixlen = EVPN_TYPE_2_ROUTE_PREFIXLEN; |
2833 | p.prefix.route_type = BGP_EVPN_MAC_IP_ROUTE; | |
2834 | ||
2835 | /* Skip over Ethernet Seg Identifier for now. */ | |
2836 | pfx += 10; | |
2837 | ||
2838 | /* Skip over Ethernet Tag for now. */ | |
2839 | pfx += 4; | |
2840 | ||
2841 | /* Get the MAC Addr len */ | |
2842 | macaddr_len = *pfx++; | |
2843 | ||
2844 | /* Get the MAC Addr */ | |
28328ea9 DS |
2845 | if (macaddr_len == (ETH_ALEN * 8)) { |
2846 | memcpy(&p.prefix.mac.octet, pfx, ETH_ALEN); | |
2847 | pfx += ETH_ALEN; | |
d62a17ae | 2848 | } else { |
2849 | zlog_err( | |
2850 | "%u:%s - Rx EVPN Type-2 NLRI with unsupported MAC address length %d", | |
2851 | peer->bgp->vrf_id, peer->host, macaddr_len); | |
2852 | return -1; | |
2853 | } | |
2854 | ||
2855 | ||
2856 | /* Get the IP. */ | |
2857 | ipaddr_len = *pfx++; | |
2858 | if (ipaddr_len != 0 && ipaddr_len != IPV4_MAX_BITLEN | |
2859 | && ipaddr_len != IPV6_MAX_BITLEN) { | |
2860 | zlog_err( | |
2861 | "%u:%s - Rx EVPN Type-2 NLRI with unsupported IP address length %d", | |
2862 | peer->bgp->vrf_id, peer->host, ipaddr_len); | |
2863 | return -1; | |
2864 | } | |
2865 | ||
2866 | if (ipaddr_len) { | |
2867 | ipaddr_len /= 8; /* Convert to bytes. */ | |
2868 | p.prefix.ip.ipa_type = (ipaddr_len == IPV4_MAX_BYTELEN) | |
2869 | ? IPADDR_V4 | |
2870 | : IPADDR_V6; | |
2871 | memcpy(&p.prefix.ip.ip.addr, pfx, ipaddr_len); | |
2872 | } | |
2873 | pfx += ipaddr_len; | |
2874 | ||
b57ba6d2 MK |
2875 | /* Get the VNI(s). Stored as bytes here. */ |
2876 | num_labels++; | |
2877 | memset(label, 0, sizeof(label)); | |
2878 | memcpy(&label[0], pfx, BGP_LABEL_BYTES); | |
1b817c78 | 2879 | pfx += BGP_LABEL_BYTES; |
b57ba6d2 MK |
2880 | psize -= (33 + ipaddr_len); |
2881 | /* Do we have a second VNI? */ | |
2882 | if (psize) { | |
2883 | num_labels++; | |
2884 | memcpy(&label[1], pfx, BGP_LABEL_BYTES); | |
6b11bd8d | 2885 | /* |
2886 | * If in future, we are required to access additional fields, | |
996c9314 LB |
2887 | * we MUST increment pfx by BGP_LABEL_BYTES in before reading |
2888 | * the next field | |
6b11bd8d | 2889 | */ |
b57ba6d2 | 2890 | } |
d62a17ae | 2891 | |
2892 | /* Process the route. */ | |
2893 | if (attr) | |
2894 | ret = bgp_update(peer, (struct prefix *)&p, addpath_id, attr, | |
2895 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
b57ba6d2 | 2896 | &prd, &label[0], num_labels, 0, NULL); |
d62a17ae | 2897 | else |
2898 | ret = bgp_withdraw(peer, (struct prefix *)&p, addpath_id, attr, | |
2899 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
b57ba6d2 | 2900 | &prd, &label[0], num_labels, NULL); |
d62a17ae | 2901 | return ret; |
128ea8ab | 2902 | } |
2903 | ||
2904 | /* | |
2905 | * Process received EVPN type-3 route (advertise or withdraw). | |
2906 | */ | |
d62a17ae | 2907 | static int process_type3_route(struct peer *peer, afi_t afi, safi_t safi, |
2908 | struct attr *attr, u_char *pfx, int psize, | |
2909 | u_int32_t addpath_id) | |
2910 | { | |
2911 | struct prefix_rd prd; | |
2912 | struct prefix_evpn p; | |
2913 | u_char ipaddr_len; | |
2914 | int ret; | |
2915 | ||
2916 | /* Type-3 route should be either 17 or 29 bytes: RD (8), Eth Tag (4), | |
2917 | * IP len (1) and IP (4 or 16). | |
2918 | */ | |
2919 | if (psize != 17 && psize != 29) { | |
2920 | zlog_err("%u:%s - Rx EVPN Type-3 NLRI with invalid length %d", | |
2921 | peer->bgp->vrf_id, peer->host, psize); | |
2922 | return -1; | |
2923 | } | |
2924 | ||
2925 | /* Make prefix_rd */ | |
2926 | prd.family = AF_UNSPEC; | |
2927 | prd.prefixlen = 64; | |
2928 | memcpy(&prd.val, pfx, 8); | |
2929 | pfx += 8; | |
2930 | ||
2931 | /* Make EVPN prefix. */ | |
2932 | memset(&p, 0, sizeof(struct prefix_evpn)); | |
b03b8898 | 2933 | p.family = AF_EVPN; |
d62a17ae | 2934 | p.prefixlen = EVPN_TYPE_3_ROUTE_PREFIXLEN; |
2935 | p.prefix.route_type = BGP_EVPN_IMET_ROUTE; | |
2936 | ||
2937 | /* Skip over Ethernet Tag for now. */ | |
2938 | pfx += 4; | |
2939 | ||
2940 | /* Get the IP. */ | |
2941 | ipaddr_len = *pfx++; | |
2942 | if (ipaddr_len == IPV4_MAX_BITLEN) { | |
2943 | p.prefix.ip.ipa_type = IPADDR_V4; | |
2944 | memcpy(&p.prefix.ip.ip.addr, pfx, IPV4_MAX_BYTELEN); | |
2945 | } else { | |
2946 | zlog_err( | |
2947 | "%u:%s - Rx EVPN Type-3 NLRI with unsupported IP address length %d", | |
2948 | peer->bgp->vrf_id, peer->host, ipaddr_len); | |
2949 | return -1; | |
2950 | } | |
2951 | ||
2952 | /* Process the route. */ | |
2953 | if (attr) | |
2954 | ret = bgp_update(peer, (struct prefix *)&p, addpath_id, attr, | |
2955 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
b57ba6d2 | 2956 | &prd, NULL, 0, 0, NULL); |
d62a17ae | 2957 | else |
2958 | ret = bgp_withdraw(peer, (struct prefix *)&p, addpath_id, attr, | |
2959 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
b57ba6d2 | 2960 | &prd, NULL, 0, NULL); |
d62a17ae | 2961 | return ret; |
128ea8ab | 2962 | } |
2963 | ||
2964 | /* | |
2965 | * Process received EVPN type-5 route (advertise or withdraw). | |
2966 | */ | |
d62a17ae | 2967 | static int process_type5_route(struct peer *peer, afi_t afi, safi_t safi, |
2968 | struct attr *attr, u_char *pfx, int psize, | |
2969 | u_int32_t addpath_id, int withdraw) | |
2970 | { | |
2971 | struct prefix_rd prd; | |
2972 | struct prefix_evpn p; | |
2973 | struct bgp_route_evpn evpn; | |
2974 | u_char ippfx_len; | |
2975 | u_int32_t eth_tag; | |
b57ba6d2 | 2976 | mpls_label_t label; /* holds the VNI as in the packet */ |
d62a17ae | 2977 | int ret; |
2978 | ||
2979 | /* Type-5 route should be 34 or 58 bytes: | |
2980 | * RD (8), ESI (10), Eth Tag (4), IP len (1), IP (4 or 16), | |
2981 | * GW (4 or 16) and VNI (3). | |
2982 | * Note that the IP and GW should both be IPv4 or both IPv6. | |
2983 | */ | |
2984 | if (psize != 34 && psize != 58) { | |
2985 | zlog_err("%u:%s - Rx EVPN Type-5 NLRI with invalid length %d", | |
2986 | peer->bgp->vrf_id, peer->host, psize); | |
2987 | return -1; | |
2988 | } | |
2989 | ||
2990 | /* Make prefix_rd */ | |
2991 | prd.family = AF_UNSPEC; | |
2992 | prd.prefixlen = 64; | |
2993 | memcpy(&prd.val, pfx, 8); | |
2994 | pfx += 8; | |
2995 | ||
2996 | /* Make EVPN prefix. */ | |
2997 | memset(&p, 0, sizeof(struct prefix_evpn)); | |
b03b8898 | 2998 | p.family = AF_EVPN; |
e9fc2840 | 2999 | p.prefixlen = EVPN_TYPE_5_ROUTE_PREFIXLEN; |
d62a17ae | 3000 | p.prefix.route_type = BGP_EVPN_IP_PREFIX_ROUTE; |
3001 | ||
3002 | /* Additional information outside of prefix - ESI and GW IP */ | |
3003 | memset(&evpn, 0, sizeof(evpn)); | |
3004 | ||
3005 | /* Fetch ESI */ | |
3006 | memcpy(&evpn.eth_s_id.val, pfx, 10); | |
3007 | pfx += 10; | |
3008 | ||
3009 | /* Fetch Ethernet Tag. */ | |
3010 | memcpy(ð_tag, pfx, 4); | |
3011 | p.prefix.eth_tag = ntohl(eth_tag); | |
3012 | pfx += 4; | |
3013 | ||
3014 | /* Fetch IP prefix length. */ | |
3015 | ippfx_len = *pfx++; | |
3016 | if (ippfx_len > IPV6_MAX_BITLEN) { | |
3017 | zlog_err( | |
3018 | "%u:%s - Rx EVPN Type-5 NLRI with invalid IP Prefix length %d", | |
3019 | peer->bgp->vrf_id, peer->host, ippfx_len); | |
3020 | return -1; | |
3021 | } | |
3022 | p.prefix.ip_prefix_length = ippfx_len; | |
3023 | ||
3024 | /* Determine IPv4 or IPv6 prefix */ | |
3025 | /* Since the address and GW are from the same family, this just becomes | |
3026 | * a simple check on the total size. | |
3027 | */ | |
3028 | if (psize == 34) { | |
3029 | SET_IPADDR_V4(&p.prefix.ip); | |
3030 | memcpy(&p.prefix.ip.ipaddr_v4, pfx, 4); | |
3031 | pfx += 4; | |
3032 | memcpy(&evpn.gw_ip.ipv4, pfx, 4); | |
3033 | pfx += 4; | |
d62a17ae | 3034 | } else { |
3035 | SET_IPADDR_V6(&p.prefix.ip); | |
3036 | memcpy(&p.prefix.ip.ipaddr_v6, pfx, 16); | |
3037 | pfx += 16; | |
3038 | memcpy(&evpn.gw_ip.ipv6, pfx, 16); | |
3039 | pfx += 16; | |
d62a17ae | 3040 | } |
3041 | ||
b57ba6d2 MK |
3042 | /* Get the VNI (in MPLS label field). Stored as bytes here. */ |
3043 | memset(&label, 0, sizeof(label)); | |
3044 | memcpy(&label, pfx, BGP_LABEL_BYTES); | |
6b11bd8d | 3045 | |
3046 | /* | |
3047 | * If in future, we are required to access additional fields, | |
996c9314 LB |
3048 | * we MUST increment pfx by BGP_LABEL_BYTES in before reading the next |
3049 | * field | |
6b11bd8d | 3050 | */ |
d62a17ae | 3051 | |
3052 | /* Process the route. */ | |
3053 | if (!withdraw) | |
3054 | ret = bgp_update(peer, (struct prefix *)&p, addpath_id, attr, | |
3055 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
b57ba6d2 | 3056 | &prd, &label, 1, 0, &evpn); |
d62a17ae | 3057 | else |
3058 | ret = bgp_withdraw(peer, (struct prefix *)&p, addpath_id, attr, | |
3059 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
b57ba6d2 | 3060 | &prd, &label, 1, &evpn); |
d62a17ae | 3061 | |
3062 | return ret; | |
3063 | } | |
3064 | ||
3065 | static void evpn_mpattr_encode_type5(struct stream *s, struct prefix *p, | |
996c9314 LB |
3066 | struct prefix_rd *prd, mpls_label_t *label, |
3067 | u_int32_t num_labels, struct attr *attr) | |
d62a17ae | 3068 | { |
3069 | int len; | |
3070 | char temp[16]; | |
3071 | struct evpn_addr *p_evpn_p; | |
3072 | ||
3073 | memset(&temp, 0, 16); | |
b03b8898 | 3074 | if (p->family != AF_EVPN) |
d62a17ae | 3075 | return; |
3076 | p_evpn_p = &(p->u.prefix_evpn); | |
3077 | ||
e9fc2840 | 3078 | /* len denites the total len of IP and GW-IP in the route |
523cafc4 | 3079 | IP and GW-IP have to be both ipv4 or ipv6 |
3080 | */ | |
d62a17ae | 3081 | if (IS_IPADDR_V4(&p_evpn_p->ip)) |
e9fc2840 | 3082 | len = 8; /* IP and GWIP are both ipv4 */ |
d62a17ae | 3083 | else |
e9fc2840 | 3084 | len = 32; /* IP and GWIP are both ipv6 */ |
d62a17ae | 3085 | /* Prefix contains RD, ESI, EthTag, IP length, IP, GWIP and VNI */ |
3086 | stream_putc(s, 8 + 10 + 4 + 1 + len + 3); | |
3087 | stream_put(s, prd->val, 8); | |
0af35d90 | 3088 | if (attr) |
d62a17ae | 3089 | stream_put(s, &(attr->evpn_overlay.eth_s_id), 10); |
3090 | else | |
3091 | stream_put(s, &temp, 10); | |
3092 | stream_putl(s, p_evpn_p->eth_tag); | |
3093 | stream_putc(s, p_evpn_p->ip_prefix_length); | |
3094 | if (IS_IPADDR_V4(&p_evpn_p->ip)) | |
3095 | stream_put_ipv4(s, p_evpn_p->ip.ipaddr_v4.s_addr); | |
3096 | else | |
3097 | stream_put(s, &p_evpn_p->ip.ipaddr_v6, 16); | |
0af35d90 | 3098 | if (attr) { |
d62a17ae | 3099 | if (IS_IPADDR_V4(&p_evpn_p->ip)) |
3100 | stream_put_ipv4(s, | |
3101 | attr->evpn_overlay.gw_ip.ipv4.s_addr); | |
3102 | else | |
3103 | stream_put(s, &(attr->evpn_overlay.gw_ip.ipv6), 16); | |
3104 | } else { | |
3105 | if (IS_IPADDR_V4(&p_evpn_p->ip)) | |
3106 | stream_put_ipv4(s, 0); | |
3107 | else | |
3108 | stream_put(s, &temp, 16); | |
3109 | } | |
3110 | ||
b57ba6d2 | 3111 | if (num_labels) |
d62a17ae | 3112 | stream_put(s, label, 3); |
3113 | else | |
3114 | stream_put3(s, 0); | |
128ea8ab | 3115 | } |
3116 | ||
3117 | /* | |
3118 | * Cleanup specific VNI upon EVPN (advertise-all-vni) being disabled. | |
3119 | */ | |
d62a17ae | 3120 | static void cleanup_vni_on_disable(struct hash_backet *backet, struct bgp *bgp) |
128ea8ab | 3121 | { |
d62a17ae | 3122 | struct bgpevpn *vpn = (struct bgpevpn *)backet->data; |
128ea8ab | 3123 | |
d62a17ae | 3124 | /* Remove EVPN routes and schedule for processing. */ |
3125 | delete_routes_for_vni(bgp, vpn); | |
128ea8ab | 3126 | |
d62a17ae | 3127 | /* Clear "live" flag and see if hash needs to be freed. */ |
3128 | UNSET_FLAG(vpn->flags, VNI_FLAG_LIVE); | |
3129 | if (!is_vni_configured(vpn)) | |
3130 | bgp_evpn_free(bgp, vpn); | |
128ea8ab | 3131 | } |
3132 | ||
3133 | /* | |
3134 | * Free a VNI entry; iterator function called during cleanup. | |
3135 | */ | |
d62a17ae | 3136 | static void free_vni_entry(struct hash_backet *backet, struct bgp *bgp) |
128ea8ab | 3137 | { |
d62a17ae | 3138 | struct bgpevpn *vpn; |
128ea8ab | 3139 | |
d62a17ae | 3140 | vpn = (struct bgpevpn *)backet->data; |
3141 | delete_all_vni_routes(bgp, vpn); | |
3142 | bgp_evpn_free(bgp, vpn); | |
128ea8ab | 3143 | } |
3144 | ||
c581d8b0 MK |
3145 | /* |
3146 | * Derive AUTO import RT for BGP VRF - L3VNI | |
3147 | */ | |
3148 | static void evpn_auto_rt_import_add_for_vrf(struct bgp *bgp_vrf) | |
3149 | { | |
10ebe1ab MK |
3150 | struct bgp *bgp_def = NULL; |
3151 | ||
c581d8b0 | 3152 | form_auto_rt(bgp_vrf, bgp_vrf->l3vni, bgp_vrf->vrf_import_rtl); |
10ebe1ab MK |
3153 | UNSET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_IMPORT_RT_CFGD); |
3154 | ||
3155 | /* Map RT to VRF */ | |
3156 | bgp_def = bgp_get_default(); | |
3157 | if (!bgp_def) | |
3158 | return; | |
3159 | bgp_evpn_map_vrf_to_its_rts(bgp_vrf); | |
c581d8b0 MK |
3160 | } |
3161 | ||
3162 | /* | |
3163 | * Delete AUTO import RT from BGP VRF - L3VNI | |
3164 | */ | |
3165 | static void evpn_auto_rt_import_delete_for_vrf(struct bgp *bgp_vrf) | |
3166 | { | |
3167 | evpn_rt_delete_auto(bgp_vrf, bgp_vrf->l3vni, bgp_vrf->vrf_import_rtl); | |
3168 | } | |
3169 | ||
3170 | /* | |
3171 | * Derive AUTO export RT for BGP VRF - L3VNI | |
3172 | */ | |
3173 | static void evpn_auto_rt_export_add_for_vrf(struct bgp *bgp_vrf) | |
3174 | { | |
3175 | UNSET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_EXPORT_RT_CFGD); | |
3176 | form_auto_rt(bgp_vrf, bgp_vrf->l3vni, bgp_vrf->vrf_export_rtl); | |
3177 | } | |
3178 | ||
3179 | /* | |
3180 | * Delete AUTO export RT from BGP VRF - L3VNI | |
3181 | */ | |
3182 | static void evpn_auto_rt_export_delete_for_vrf(struct bgp *bgp_vrf) | |
3183 | { | |
3184 | evpn_rt_delete_auto(bgp_vrf, bgp_vrf->l3vni, bgp_vrf->vrf_export_rtl); | |
3185 | } | |
128ea8ab | 3186 | |
f1f8b53c MK |
3187 | static void bgp_evpn_handle_export_rt_change_for_vrf(struct bgp *bgp_vrf) |
3188 | { | |
3189 | struct bgp *bgp_def = NULL; | |
3190 | struct listnode *node = NULL; | |
3191 | struct bgpevpn *vpn = NULL; | |
3192 | ||
3193 | bgp_def = bgp_get_default(); | |
3194 | if (!bgp_def) | |
3195 | return; | |
3196 | ||
4992b4ae MK |
3197 | /* update all type-5 routes */ |
3198 | update_advertise_vrf_routes(bgp_vrf); | |
3199 | ||
3200 | /* update all type-2 routes */ | |
f1f8b53c MK |
3201 | for (ALL_LIST_ELEMENTS_RO(bgp_vrf->l2vnis, node, vpn)) |
3202 | update_routes_for_vni(bgp_def, vpn); | |
3203 | } | |
3204 | ||
128ea8ab | 3205 | /* |
3206 | * Public functions. | |
3207 | */ | |
3208 | ||
5424b7ba | 3209 | /* withdraw type-5 route corresponding to ip prefix */ |
31310b25 | 3210 | void bgp_evpn_withdraw_type5_route(struct bgp *bgp_vrf, struct prefix *p, |
5424b7ba MK |
3211 | afi_t afi, safi_t safi) |
3212 | { | |
3213 | int ret = 0; | |
3214 | struct prefix_evpn evp; | |
3215 | char buf[PREFIX_STRLEN]; | |
3216 | ||
faafdfa8 | 3217 | /* NOTE: Check needed as this is called per-route also. */ |
3218 | if (!advertise_type5_routes(bgp_vrf, afi)) | |
3219 | return; | |
3220 | ||
31310b25 | 3221 | build_type5_prefix_from_ip_prefix(&evp, p); |
5424b7ba MK |
3222 | ret = delete_evpn_type5_route(bgp_vrf, &evp); |
3223 | if (ret) { | |
3224 | zlog_err( | |
996c9314 LB |
3225 | "%u failed to delete type-5 route for prefix %s in vrf %s", |
3226 | bgp_vrf->vrf_id, prefix2str(p, buf, sizeof(buf)), | |
3227 | vrf_id_to_name(bgp_vrf->vrf_id)); | |
5424b7ba MK |
3228 | } |
3229 | } | |
3230 | ||
342dd0c6 | 3231 | /* withdraw all type-5 routes for an address family */ |
996c9314 | 3232 | void bgp_evpn_withdraw_type5_routes(struct bgp *bgp_vrf, afi_t afi, safi_t safi) |
342dd0c6 | 3233 | { |
3234 | struct bgp_table *table = NULL; | |
3235 | struct bgp_node *rn = NULL; | |
25f2ca53 | 3236 | struct bgp_info *ri; |
342dd0c6 | 3237 | |
faafdfa8 | 3238 | /* Bail out early if we don't have to advertise type-5 routes. */ |
06d2e8f3 MK |
3239 | if (!advertise_type5_routes(bgp_vrf, afi)) |
3240 | return; | |
3241 | ||
053905d2 | 3242 | table = bgp_vrf->rib[afi][safi]; |
25f2ca53 | 3243 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) { |
3244 | /* Only care about "selected" routes - non-imported. */ | |
3245 | /* TODO: Support for AddPath for EVPN. */ | |
3246 | for (ri = rn->info; ri; ri = ri->next) { | |
996c9314 LB |
3247 | if (CHECK_FLAG(ri->flags, BGP_INFO_SELECTED) |
3248 | && (!ri->extra || !ri->extra->parent)) { | |
25f2ca53 | 3249 | bgp_evpn_withdraw_type5_route(bgp_vrf, &rn->p, |
3250 | afi, safi); | |
3251 | break; | |
3252 | } | |
3253 | } | |
3254 | } | |
5424b7ba | 3255 | } |
342dd0c6 | 3256 | |
2f69f6d3 | 3257 | /* |
3258 | * Advertise IP prefix as type-5 route. The afi/safi and src_attr passed | |
3259 | * to this function correspond to those of the source IP prefix (best | |
3260 | * path in the case of the attr. In the case of a local prefix (when we | |
3261 | * are advertising local subnets), the src_attr will be NULL. | |
3262 | */ | |
31310b25 | 3263 | void bgp_evpn_advertise_type5_route(struct bgp *bgp_vrf, struct prefix *p, |
996c9314 LB |
3264 | struct attr *src_attr, afi_t afi, |
3265 | safi_t safi) | |
5424b7ba MK |
3266 | { |
3267 | int ret = 0; | |
3268 | struct prefix_evpn evp; | |
3269 | char buf[PREFIX_STRLEN]; | |
3270 | ||
faafdfa8 | 3271 | /* NOTE: Check needed as this is called per-route also. */ |
5424b7ba MK |
3272 | if (!advertise_type5_routes(bgp_vrf, afi)) |
3273 | return; | |
3274 | ||
31310b25 | 3275 | build_type5_prefix_from_ip_prefix(&evp, p); |
2f69f6d3 | 3276 | ret = update_evpn_type5_route(bgp_vrf, &evp, src_attr); |
3277 | if (ret) | |
996c9314 LB |
3278 | zlog_err("%u: Failed to create type-5 route for prefix %s", |
3279 | bgp_vrf->vrf_id, prefix2str(p, buf, sizeof(buf))); | |
342dd0c6 | 3280 | } |
3281 | ||
2f69f6d3 | 3282 | /* Inject all prefixes of a particular address-family (currently, IPv4 or |
3283 | * IPv6 unicast) into EVPN as type-5 routes. This is invoked when the | |
3284 | * advertisement is enabled. | |
3285 | */ | |
996c9314 LB |
3286 | void bgp_evpn_advertise_type5_routes(struct bgp *bgp_vrf, afi_t afi, |
3287 | safi_t safi) | |
342dd0c6 | 3288 | { |
3289 | struct bgp_table *table = NULL; | |
3290 | struct bgp_node *rn = NULL; | |
2f69f6d3 | 3291 | struct bgp_info *ri; |
342dd0c6 | 3292 | |
faafdfa8 | 3293 | /* Bail out early if we don't have to advertise type-5 routes. */ |
3294 | if (!advertise_type5_routes(bgp_vrf, afi)) | |
3295 | return; | |
342dd0c6 | 3296 | |
053905d2 | 3297 | table = bgp_vrf->rib[afi][safi]; |
31310b25 | 3298 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) { |
2f69f6d3 | 3299 | /* Need to identify the "selected" route entry to use its |
25f2ca53 | 3300 | * attribute. Also, we only consider "non-imported" routes. |
2f69f6d3 | 3301 | * TODO: Support for AddPath for EVPN. |
3302 | */ | |
3303 | for (ri = rn->info; ri; ri = ri->next) { | |
996c9314 LB |
3304 | if (CHECK_FLAG(ri->flags, BGP_INFO_SELECTED) |
3305 | && (!ri->extra || !ri->extra->parent)) { | |
53c84f78 MK |
3306 | |
3307 | /* apply the route-map */ | |
3308 | if (bgp_vrf->adv_cmd_rmap[afi][safi].map) { | |
3309 | int ret = 0; | |
3310 | ||
996c9314 LB |
3311 | ret = route_map_apply( |
3312 | bgp_vrf->adv_cmd_rmap[afi][safi] | |
3313 | .map, | |
3314 | &rn->p, RMAP_BGP, ri); | |
53c84f78 MK |
3315 | if (ret == RMAP_DENYMATCH) |
3316 | continue; | |
3317 | } | |
996c9314 LB |
3318 | bgp_evpn_advertise_type5_route( |
3319 | bgp_vrf, &rn->p, ri->attr, afi, safi); | |
2f69f6d3 | 3320 | break; |
3321 | } | |
3322 | } | |
31310b25 | 3323 | } |
342dd0c6 | 3324 | } |
3325 | ||
996c9314 | 3326 | void evpn_rt_delete_auto(struct bgp *bgp, vni_t vni, struct list *rtl) |
c581d8b0 MK |
3327 | { |
3328 | struct listnode *node, *nnode, *node_to_del; | |
3329 | struct ecommunity *ecom, *ecom_auto; | |
3330 | struct ecommunity_val eval; | |
3331 | ||
3332 | encode_route_target_as((bgp->as & 0xFFFF), vni, &eval); | |
3333 | ||
3334 | ecom_auto = ecommunity_new(); | |
3335 | ecommunity_add_val(ecom_auto, &eval); | |
3336 | node_to_del = NULL; | |
3337 | ||
3338 | for (ALL_LIST_ELEMENTS(rtl, node, nnode, ecom)) { | |
3339 | if (ecommunity_match(ecom, ecom_auto)) { | |
3340 | ecommunity_free(&ecom); | |
3341 | node_to_del = node; | |
3342 | } | |
3343 | } | |
3344 | ||
3345 | if (node_to_del) | |
3346 | list_delete_node(rtl, node_to_del); | |
3347 | ||
3348 | ecommunity_free(&ecom_auto); | |
3349 | } | |
3350 | ||
3351 | void bgp_evpn_configure_import_rt_for_vrf(struct bgp *bgp_vrf, | |
10ebe1ab | 3352 | struct ecommunity *ecomadd) |
c581d8b0 | 3353 | { |
5ba238b7 MK |
3354 | /* uninstall routes from vrf */ |
3355 | uninstall_routes_for_vrf(bgp_vrf); | |
10ebe1ab MK |
3356 | |
3357 | /* Cleanup the RT to VRF mapping */ | |
3358 | bgp_evpn_unmap_vrf_from_its_rts(bgp_vrf); | |
3359 | ||
c581d8b0 MK |
3360 | /* Remove auto generated RT */ |
3361 | evpn_auto_rt_import_delete_for_vrf(bgp_vrf); | |
3362 | ||
3363 | /* Add the newly configured RT to RT list */ | |
3364 | listnode_add_sort(bgp_vrf->vrf_import_rtl, ecomadd); | |
3365 | SET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_IMPORT_RT_CFGD); | |
3366 | ||
10ebe1ab MK |
3367 | /* map VRF to its RTs */ |
3368 | bgp_evpn_map_vrf_to_its_rts(bgp_vrf); | |
3369 | ||
5ba238b7 MK |
3370 | /* install routes matching the new VRF */ |
3371 | install_routes_for_vrf(bgp_vrf); | |
c581d8b0 MK |
3372 | } |
3373 | ||
3374 | void bgp_evpn_unconfigure_import_rt_for_vrf(struct bgp *bgp_vrf, | |
3375 | struct ecommunity *ecomdel) | |
3376 | { | |
3377 | struct listnode *node = NULL, *nnode = NULL, *node_to_del = NULL; | |
3378 | struct ecommunity *ecom = NULL; | |
3379 | ||
5ba238b7 MK |
3380 | /* uninstall routes from vrf */ |
3381 | uninstall_routes_for_vrf(bgp_vrf); | |
10ebe1ab MK |
3382 | |
3383 | /* Cleanup the RT to VRF mapping */ | |
3384 | bgp_evpn_unmap_vrf_from_its_rts(bgp_vrf); | |
3385 | ||
c581d8b0 MK |
3386 | /* remove the RT from the RT list */ |
3387 | for (ALL_LIST_ELEMENTS(bgp_vrf->vrf_import_rtl, node, nnode, ecom)) { | |
3388 | if (ecommunity_match(ecom, ecomdel)) { | |
3389 | ecommunity_free(&ecom); | |
3390 | node_to_del = node; | |
3391 | break; | |
3392 | } | |
3393 | } | |
3394 | ||
3395 | if (node_to_del) | |
3396 | list_delete_node(bgp_vrf->vrf_import_rtl, node_to_del); | |
3397 | ||
3398 | /* fallback to auto import rt, if this was the last RT */ | |
3399 | if (list_isempty(bgp_vrf->vrf_import_rtl)) { | |
3400 | UNSET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_IMPORT_RT_CFGD); | |
3401 | evpn_auto_rt_import_add_for_vrf(bgp_vrf); | |
3402 | } | |
3403 | ||
10ebe1ab MK |
3404 | /* map VRFs to its RTs */ |
3405 | bgp_evpn_map_vrf_to_its_rts(bgp_vrf); | |
3406 | ||
5ba238b7 MK |
3407 | /* install routes matching this new RT */ |
3408 | install_routes_for_vrf(bgp_vrf); | |
c581d8b0 MK |
3409 | } |
3410 | ||
3411 | void bgp_evpn_configure_export_rt_for_vrf(struct bgp *bgp_vrf, | |
3412 | struct ecommunity *ecomadd) | |
3413 | { | |
3414 | /* remove auto-generated RT */ | |
3415 | evpn_auto_rt_export_delete_for_vrf(bgp_vrf); | |
3416 | ||
3417 | /* Add the new RT to the RT list */ | |
3418 | listnode_add_sort(bgp_vrf->vrf_export_rtl, ecomadd); | |
3419 | SET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_EXPORT_RT_CFGD); | |
3420 | ||
f1f8b53c | 3421 | bgp_evpn_handle_export_rt_change_for_vrf(bgp_vrf); |
c581d8b0 MK |
3422 | } |
3423 | ||
3424 | void bgp_evpn_unconfigure_export_rt_for_vrf(struct bgp *bgp_vrf, | |
3425 | struct ecommunity *ecomdel) | |
3426 | { | |
3427 | struct listnode *node = NULL, *nnode = NULL, *node_to_del = NULL; | |
3428 | struct ecommunity *ecom = NULL; | |
3429 | ||
3430 | /* Remove the RT from the RT list */ | |
3431 | for (ALL_LIST_ELEMENTS(bgp_vrf->vrf_export_rtl, node, nnode, ecom)) { | |
3432 | if (ecommunity_match(ecom, ecomdel)) { | |
3433 | ecommunity_free(&ecom); | |
3434 | node_to_del = node; | |
3435 | break; | |
3436 | } | |
3437 | } | |
3438 | ||
3439 | if (node_to_del) | |
3440 | list_delete_node(bgp_vrf->vrf_export_rtl, node_to_del); | |
3441 | ||
3442 | /* fall back to auto-generated RT if this was the last RT */ | |
877702e7 | 3443 | if (bgp_vrf->vrf_export_rtl && list_isempty(bgp_vrf->vrf_export_rtl)) { |
c581d8b0 MK |
3444 | UNSET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_EXPORT_RT_CFGD); |
3445 | evpn_auto_rt_export_add_for_vrf(bgp_vrf); | |
3446 | } | |
3447 | ||
f1f8b53c | 3448 | bgp_evpn_handle_export_rt_change_for_vrf(bgp_vrf); |
c581d8b0 MK |
3449 | } |
3450 | ||
2d48ee25 | 3451 | /* |
3452 | * Handle change to BGP router id. This is invoked twice by the change | |
3453 | * handler, first before the router id has been changed and then after | |
3454 | * the router id has been changed. The first invocation will result in | |
676f83b9 | 3455 | * local routes for all VNIs/VRF being deleted and withdrawn and the next |
2d48ee25 | 3456 | * will result in the routes being re-advertised. |
3457 | */ | |
d62a17ae | 3458 | void bgp_evpn_handle_router_id_update(struct bgp *bgp, int withdraw) |
2d48ee25 | 3459 | { |
676f83b9 | 3460 | if (withdraw) { |
3461 | ||
3462 | /* delete and withdraw all the type-5 routes | |
523cafc4 | 3463 | stored in the global table for this vrf |
3464 | */ | |
80b140af | 3465 | withdraw_router_id_vrf(bgp); |
676f83b9 | 3466 | |
3467 | /* delete all the VNI routes (type-2/type-3) routes for all the | |
523cafc4 | 3468 | * L2-VNIs |
3469 | */ | |
d62a17ae | 3470 | hash_iterate(bgp->vnihash, |
3471 | (void (*)(struct hash_backet *, | |
3472 | void *))withdraw_router_id_vni, | |
3473 | bgp); | |
676f83b9 | 3474 | } else { |
3475 | ||
3476 | /* advertise all routes in the vrf as type-5 routes with the new | |
523cafc4 | 3477 | * RD |
3478 | */ | |
80b140af | 3479 | update_router_id_vrf(bgp); |
676f83b9 | 3480 | |
3481 | /* advertise all the VNI routes (type-2/type-3) routes with the | |
523cafc4 | 3482 | * new RD |
3483 | */ | |
d62a17ae | 3484 | hash_iterate(bgp->vnihash, |
3485 | (void (*)(struct hash_backet *, | |
3486 | void *))update_router_id_vni, | |
3487 | bgp); | |
676f83b9 | 3488 | } |
2d48ee25 | 3489 | } |
3490 | ||
90e60aa7 | 3491 | /* |
3492 | * Handle change to export RT - update and advertise local routes. | |
3493 | */ | |
d62a17ae | 3494 | int bgp_evpn_handle_export_rt_change(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 3495 | { |
d62a17ae | 3496 | return update_routes_for_vni(bgp, vpn); |
90e60aa7 | 3497 | } |
3498 | ||
996c9314 | 3499 | void bgp_evpn_handle_vrf_rd_change(struct bgp *bgp_vrf, int withdraw) |
676f83b9 | 3500 | { |
3501 | if (withdraw) | |
3502 | delete_withdraw_vrf_routes(bgp_vrf); | |
3503 | else | |
3504 | update_advertise_vrf_routes(bgp_vrf); | |
3505 | } | |
3506 | ||
90e60aa7 | 3507 | /* |
3508 | * Handle change to RD. This is invoked twice by the change handler, | |
3509 | * first before the RD has been changed and then after the RD has | |
3510 | * been changed. The first invocation will result in local routes | |
3511 | * of this VNI being deleted and withdrawn and the next will result | |
3512 | * in the routes being re-advertised. | |
3513 | */ | |
d62a17ae | 3514 | void bgp_evpn_handle_rd_change(struct bgp *bgp, struct bgpevpn *vpn, |
3515 | int withdraw) | |
90e60aa7 | 3516 | { |
d62a17ae | 3517 | if (withdraw) |
3518 | delete_withdraw_vni_routes(bgp, vpn); | |
3519 | else | |
3520 | update_advertise_vni_routes(bgp, vpn); | |
90e60aa7 | 3521 | } |
3522 | ||
3523 | /* | |
3524 | * Install routes for this VNI. Invoked upon change to Import RT. | |
3525 | */ | |
d62a17ae | 3526 | int bgp_evpn_install_routes(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 3527 | { |
d62a17ae | 3528 | return install_routes_for_vni(bgp, vpn); |
90e60aa7 | 3529 | } |
3530 | ||
3531 | /* | |
3532 | * Uninstall all routes installed for this VNI. Invoked upon change | |
3533 | * to Import RT. | |
3534 | */ | |
d62a17ae | 3535 | int bgp_evpn_uninstall_routes(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 3536 | { |
d62a17ae | 3537 | return uninstall_routes_for_vni(bgp, vpn); |
90e60aa7 | 3538 | } |
3539 | ||
b16031a2 | 3540 | /* |
b57ba6d2 | 3541 | * TODO: Hardcoded for a maximum of 2 VNIs right now |
b16031a2 | 3542 | */ |
996c9314 LB |
3543 | char *bgp_evpn_label2str(mpls_label_t *label, u_int32_t num_labels, char *buf, |
3544 | int len) | |
b16031a2 | 3545 | { |
b57ba6d2 | 3546 | vni_t vni1, vni2; |
b16031a2 | 3547 | |
b57ba6d2 MK |
3548 | vni1 = label2vni(label); |
3549 | if (num_labels == 2) { | |
996c9314 | 3550 | vni2 = label2vni(label + 1); |
b57ba6d2 MK |
3551 | snprintf(buf, len, "%u/%u", vni1, vni2); |
3552 | } else | |
3553 | snprintf(buf, len, "%u", vni1); | |
d62a17ae | 3554 | return buf; |
b16031a2 | 3555 | } |
3556 | ||
9c92b5f7 MK |
3557 | /* |
3558 | * Function to convert evpn route to json format. | |
3559 | * NOTE: We don't use prefix2str as the output here is a bit different. | |
3560 | */ | |
57f7feb6 | 3561 | void bgp_evpn_route2json(struct prefix_evpn *p, json_object *json) |
9c92b5f7 | 3562 | { |
b682f6de | 3563 | char buf1[ETHER_ADDR_STRLEN]; |
3564 | char buf2[PREFIX2STR_BUFFER]; | |
9c92b5f7 | 3565 | |
b682f6de | 3566 | if (!json) |
3567 | return; | |
9c92b5f7 | 3568 | |
dff8f48d | 3569 | if (p->prefix.route_type == BGP_EVPN_IMET_ROUTE) { |
b682f6de | 3570 | json_object_int_add(json, "routeType", p->prefix.route_type); |
3571 | json_object_int_add(json, "ethTag", 0); | |
57f7feb6 MK |
3572 | json_object_int_add(json, "ipLen", |
3573 | IS_EVPN_PREFIX_IPADDR_V4(p) | |
3574 | ? IPV4_MAX_BITLEN | |
3575 | : IPV6_MAX_BITLEN); | |
b682f6de | 3576 | json_object_string_add(json, "ip", |
57f7feb6 MK |
3577 | inet_ntoa(p->prefix.ip.ipaddr_v4)); |
3578 | } else if (p->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) { | |
dff8f48d | 3579 | if (IS_EVPN_PREFIX_IPADDR_NONE(p)) { |
57f7feb6 MK |
3580 | json_object_int_add(json, "routeType", |
3581 | p->prefix.route_type); | |
3582 | json_object_int_add( | |
3583 | json, "esi", | |
3584 | 0); /* TODO: we don't support esi yet */ | |
3585 | json_object_int_add(json, "ethTag", 0); | |
3586 | json_object_int_add(json, "macLen", 8 * ETH_ALEN); | |
3587 | json_object_string_add(json, "mac", | |
3588 | prefix_mac2str(&p->prefix.mac, | |
3589 | buf1, | |
3590 | sizeof(buf1))); | |
dff8f48d MK |
3591 | } else { |
3592 | u_char family; | |
3593 | ||
57f7feb6 MK |
3594 | family = IS_EVPN_PREFIX_IPADDR_V4(p) ? AF_INET |
3595 | : AF_INET6; | |
dff8f48d | 3596 | |
b682f6de | 3597 | json_object_int_add(json, "routeType", |
57f7feb6 MK |
3598 | p->prefix.route_type); |
3599 | json_object_int_add( | |
3600 | json, "esi", | |
3601 | 0); /* TODO: we don't support esi yet */ | |
b682f6de | 3602 | json_object_int_add(json, "ethTag", 0); |
57f7feb6 | 3603 | json_object_int_add(json, "macLen", 8 * ETH_ALEN); |
b682f6de | 3604 | json_object_string_add(json, "mac", |
57f7feb6 MK |
3605 | prefix_mac2str(&p->prefix.mac, |
3606 | buf1, | |
3607 | sizeof(buf1))); | |
b682f6de | 3608 | json_object_int_add(json, "ipLen", |
57f7feb6 MK |
3609 | IS_EVPN_PREFIX_IPADDR_V4(p) |
3610 | ? IPV4_MAX_BITLEN | |
3611 | : IPV6_MAX_BITLEN); | |
3612 | json_object_string_add( | |
3613 | json, "ip", | |
3614 | inet_ntop(family, &p->prefix.ip.ip.addr, buf2, | |
3615 | PREFIX2STR_BUFFER)); | |
dff8f48d MK |
3616 | } |
3617 | } else { | |
3618 | /* Currently, this is to cater to other AF_ETHERNET code. */ | |
3619 | } | |
9c92b5f7 MK |
3620 | } |
3621 | ||
520d5d76 | 3622 | /* |
3623 | * Function to convert evpn route to string. | |
3624 | * NOTE: We don't use prefix2str as the output here is a bit different. | |
3625 | */ | |
d62a17ae | 3626 | char *bgp_evpn_route2str(struct prefix_evpn *p, char *buf, int len) |
3627 | { | |
3628 | char buf1[ETHER_ADDR_STRLEN]; | |
3629 | char buf2[PREFIX2STR_BUFFER]; | |
3630 | ||
3631 | if (p->prefix.route_type == BGP_EVPN_IMET_ROUTE) { | |
3632 | snprintf(buf, len, "[%d]:[0]:[%d]:[%s]", p->prefix.route_type, | |
3633 | IS_EVPN_PREFIX_IPADDR_V4(p) ? IPV4_MAX_BITLEN | |
3634 | : IPV6_MAX_BITLEN, | |
3635 | inet_ntoa(p->prefix.ip.ipaddr_v4)); | |
3636 | } else if (p->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) { | |
3637 | if (IS_EVPN_PREFIX_IPADDR_NONE(p)) | |
3638 | snprintf(buf, len, "[%d]:[0]:[0]:[%d]:[%s]", | |
28328ea9 | 3639 | p->prefix.route_type, 8 * ETH_ALEN, |
d62a17ae | 3640 | prefix_mac2str(&p->prefix.mac, buf1, |
3641 | sizeof(buf1))); | |
3642 | else { | |
3643 | u_char family; | |
3644 | ||
3645 | family = IS_EVPN_PREFIX_IPADDR_V4(p) ? AF_INET | |
3646 | : AF_INET6; | |
3647 | snprintf(buf, len, "[%d]:[0]:[0]:[%d]:[%s]:[%d]:[%s]", | |
28328ea9 | 3648 | p->prefix.route_type, 8 * ETH_ALEN, |
d62a17ae | 3649 | prefix_mac2str(&p->prefix.mac, buf1, |
3650 | sizeof(buf1)), | |
3651 | family == AF_INET ? IPV4_MAX_BITLEN | |
3652 | : IPV6_MAX_BITLEN, | |
3653 | inet_ntop(family, &p->prefix.ip.ip.addr, buf2, | |
3654 | PREFIX2STR_BUFFER)); | |
3655 | } | |
342dd0c6 | 3656 | } else if (p->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE) { |
b3628c70 | 3657 | snprintf(buf, len, "[%d]:[0]:[0]:[%d]:[%s]", |
996c9314 LB |
3658 | p->prefix.route_type, p->prefix.ip_prefix_length, |
3659 | IS_EVPN_PREFIX_IPADDR_V4(p) | |
3660 | ? inet_ntoa(p->prefix.ip.ipaddr_v4) | |
3661 | : inet6_ntoa(p->prefix.ip.ipaddr_v6)); | |
d62a17ae | 3662 | } else { |
b03b8898 | 3663 | /* For EVPN route types not supported yet. */ |
f9aa3e55 QY |
3664 | snprintf(buf, len, "(unsupported route type %d)", |
3665 | p->prefix.route_type); | |
d62a17ae | 3666 | } |
3667 | ||
3668 | return (buf); | |
520d5d76 | 3669 | } |
3670 | ||
128ea8ab | 3671 | /* |
3672 | * Encode EVPN prefix in Update (MP_REACH) | |
3673 | */ | |
d62a17ae | 3674 | void bgp_evpn_encode_prefix(struct stream *s, struct prefix *p, |
996c9314 LB |
3675 | struct prefix_rd *prd, mpls_label_t *label, |
3676 | u_int32_t num_labels, struct attr *attr, | |
3677 | int addpath_encode, u_int32_t addpath_tx_id) | |
d62a17ae | 3678 | { |
3679 | struct prefix_evpn *evp = (struct prefix_evpn *)p; | |
b57ba6d2 | 3680 | int len, ipa_len = 0; |
d62a17ae | 3681 | |
3682 | if (addpath_encode) | |
3683 | stream_putl(s, addpath_tx_id); | |
3684 | ||
3685 | /* Route type */ | |
3686 | stream_putc(s, evp->prefix.route_type); | |
3687 | ||
3688 | switch (evp->prefix.route_type) { | |
3689 | case BGP_EVPN_MAC_IP_ROUTE: | |
3690 | if (IS_EVPN_PREFIX_IPADDR_V4(evp)) | |
3691 | ipa_len = IPV4_MAX_BYTELEN; | |
3692 | else if (IS_EVPN_PREFIX_IPADDR_V6(evp)) | |
3693 | ipa_len = IPV6_MAX_BYTELEN; | |
b57ba6d2 MK |
3694 | /* RD, ESI, EthTag, MAC+len, IP len, [IP], 1 VNI */ |
3695 | len = 8 + 10 + 4 + 1 + 6 + 1 + ipa_len + 3; | |
3696 | if (ipa_len && num_labels > 1) /* There are 2 VNIs */ | |
3697 | len += 3; | |
3698 | stream_putc(s, len); | |
996c9314 LB |
3699 | stream_put(s, prd->val, 8); /* RD */ |
3700 | stream_put(s, 0, 10); /* ESI */ | |
3701 | stream_putl(s, 0); /* Ethernet Tag ID */ | |
28328ea9 | 3702 | stream_putc(s, 8 * ETH_ALEN); /* Mac Addr Len - bits */ |
d62a17ae | 3703 | stream_put(s, evp->prefix.mac.octet, 6); /* Mac Addr */ |
3704 | stream_putc(s, 8 * ipa_len); /* IP address Length */ | |
996c9314 | 3705 | if (ipa_len) /* IP */ |
b57ba6d2 MK |
3706 | stream_put(s, &evp->prefix.ip.ip.addr, ipa_len); |
3707 | /* 1st label is the L2 VNI */ | |
3708 | stream_put(s, label, BGP_LABEL_BYTES); | |
3709 | /* Include 2nd label (L3 VNI) if advertising MAC+IP */ | |
3710 | if (ipa_len && num_labels > 1) | |
996c9314 | 3711 | stream_put(s, label + 1, BGP_LABEL_BYTES); |
d62a17ae | 3712 | break; |
3713 | ||
3714 | case BGP_EVPN_IMET_ROUTE: | |
3715 | stream_putc(s, 17); // TODO: length - assumes IPv4 address | |
3716 | stream_put(s, prd->val, 8); /* RD */ | |
3717 | stream_putl(s, 0); /* Ethernet Tag ID */ | |
3718 | stream_putc(s, IPV4_MAX_BITLEN); /* IP address Length - bits */ | |
3719 | /* Originating Router's IP Addr */ | |
3720 | stream_put_in_addr(s, &evp->prefix.ip.ipaddr_v4); | |
3721 | break; | |
3722 | ||
3723 | case BGP_EVPN_IP_PREFIX_ROUTE: | |
3724 | /* TODO: AddPath support. */ | |
b57ba6d2 | 3725 | evpn_mpattr_encode_type5(s, p, prd, label, num_labels, attr); |
d62a17ae | 3726 | break; |
3727 | ||
3728 | default: | |
3729 | break; | |
3730 | } | |
3731 | } | |
3732 | ||
3733 | int bgp_nlri_parse_evpn(struct peer *peer, struct attr *attr, | |
3734 | struct bgp_nlri *packet, int withdraw) | |
3735 | { | |
3736 | u_char *pnt; | |
3737 | u_char *lim; | |
3738 | afi_t afi; | |
3739 | safi_t safi; | |
3740 | u_int32_t addpath_id; | |
3741 | int addpath_encoded; | |
3742 | int psize = 0; | |
3743 | u_char rtype; | |
3744 | u_char rlen; | |
3745 | struct prefix p; | |
3746 | ||
3747 | /* Check peer status. */ | |
3748 | if (peer->status != Established) { | |
3749 | zlog_err("%u:%s - EVPN update received in state %d", | |
3750 | peer->bgp->vrf_id, peer->host, peer->status); | |
3751 | return -1; | |
3752 | } | |
3753 | ||
3754 | /* Start processing the NLRI - there may be multiple in the MP_REACH */ | |
3755 | pnt = packet->nlri; | |
3756 | lim = pnt + packet->length; | |
3757 | afi = packet->afi; | |
3758 | safi = packet->safi; | |
3759 | addpath_id = 0; | |
3760 | ||
3761 | addpath_encoded = | |
3762 | (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ADDPATH_AF_RX_ADV) | |
3763 | && CHECK_FLAG(peer->af_cap[afi][safi], | |
3764 | PEER_CAP_ADDPATH_AF_TX_RCV)); | |
3765 | ||
3766 | for (; pnt < lim; pnt += psize) { | |
3767 | /* Clear prefix structure. */ | |
3768 | memset(&p, 0, sizeof(struct prefix)); | |
3769 | ||
3770 | /* Deal with path-id if AddPath is supported. */ | |
3771 | if (addpath_encoded) { | |
3772 | /* When packet overflow occurs return immediately. */ | |
3773 | if (pnt + BGP_ADDPATH_ID_LEN > lim) | |
3774 | return -1; | |
3775 | ||
3776 | addpath_id = ntohl(*((uint32_t *)pnt)); | |
3777 | pnt += BGP_ADDPATH_ID_LEN; | |
3778 | } | |
3779 | ||
3780 | /* All EVPN NLRI types start with type and length. */ | |
3781 | if (pnt + 2 > lim) | |
3782 | return -1; | |
3783 | ||
3784 | rtype = *pnt++; | |
3785 | psize = rlen = *pnt++; | |
3786 | ||
3787 | /* When packet overflow occur return immediately. */ | |
3788 | if (pnt + psize > lim) | |
3789 | return -1; | |
3790 | ||
3791 | switch (rtype) { | |
3792 | case BGP_EVPN_MAC_IP_ROUTE: | |
3793 | if (process_type2_route(peer, afi, safi, | |
3794 | withdraw ? NULL : attr, pnt, | |
3795 | psize, addpath_id)) { | |
3796 | zlog_err( | |
3797 | "%u:%s - Error in processing EVPN type-2 NLRI size %d", | |
3798 | peer->bgp->vrf_id, peer->host, psize); | |
3799 | return -1; | |
3800 | } | |
3801 | break; | |
3802 | ||
3803 | case BGP_EVPN_IMET_ROUTE: | |
3804 | if (process_type3_route(peer, afi, safi, | |
3805 | withdraw ? NULL : attr, pnt, | |
3806 | psize, addpath_id)) { | |
3807 | zlog_err( | |
3808 | "%u:%s - Error in processing EVPN type-3 NLRI size %d", | |
3809 | peer->bgp->vrf_id, peer->host, psize); | |
3810 | return -1; | |
3811 | } | |
3812 | break; | |
3813 | ||
3814 | case BGP_EVPN_IP_PREFIX_ROUTE: | |
3815 | if (process_type5_route(peer, afi, safi, attr, pnt, | |
3816 | psize, addpath_id, withdraw)) { | |
3817 | zlog_err( | |
3818 | "%u:%s - Error in processing EVPN type-5 NLRI size %d", | |
3819 | peer->bgp->vrf_id, peer->host, psize); | |
3820 | return -1; | |
3821 | } | |
3822 | break; | |
3823 | ||
3824 | default: | |
3825 | break; | |
3826 | } | |
3827 | } | |
3828 | ||
3829 | /* Packet length consistency check. */ | |
3830 | if (pnt != lim) | |
3831 | return -1; | |
3832 | ||
3833 | return 0; | |
128ea8ab | 3834 | } |
3835 | ||
10ebe1ab MK |
3836 | /* |
3837 | * Map the RTs (configured or automatically derived) of a VRF to the VRF. | |
3838 | * The mapping will be used during route processing. | |
3839 | * bgp_def: default bgp instance | |
3840 | * bgp_vrf: specific bgp vrf instance on which RT is configured | |
3841 | */ | |
3842 | void bgp_evpn_map_vrf_to_its_rts(struct bgp *bgp_vrf) | |
3843 | { | |
3844 | int i = 0; | |
3845 | struct ecommunity_val *eval = NULL; | |
3846 | struct listnode *node = NULL, *nnode = NULL; | |
3847 | struct ecommunity *ecom = NULL; | |
3848 | ||
3849 | for (ALL_LIST_ELEMENTS(bgp_vrf->vrf_import_rtl, node, nnode, ecom)) { | |
3850 | for (i = 0; i < ecom->size; i++) { | |
3851 | eval = (struct ecommunity_val *)(ecom->val | |
3852 | + (i | |
3853 | * ECOMMUNITY_SIZE)); | |
3854 | map_vrf_to_rt(bgp_vrf, eval); | |
3855 | } | |
3856 | } | |
3857 | } | |
3858 | ||
3859 | /* | |
3860 | * Unmap the RTs (configured or automatically derived) of a VRF from the VRF. | |
3861 | */ | |
3862 | void bgp_evpn_unmap_vrf_from_its_rts(struct bgp *bgp_vrf) | |
3863 | { | |
3864 | int i; | |
3865 | struct ecommunity_val *eval; | |
3866 | struct listnode *node, *nnode; | |
3867 | struct ecommunity *ecom; | |
3868 | ||
3869 | for (ALL_LIST_ELEMENTS(bgp_vrf->vrf_import_rtl, node, nnode, ecom)) { | |
3870 | for (i = 0; i < ecom->size; i++) { | |
3871 | struct vrf_irt_node *irt; | |
3872 | struct ecommunity_val eval_tmp; | |
3873 | ||
3874 | eval = (struct ecommunity_val *)(ecom->val | |
3875 | + (i | |
3876 | * ECOMMUNITY_SIZE)); | |
3877 | /* If using "automatic" RT, we only care about the | |
3878 | * local-admin sub-field. | |
3879 | * This is to facilitate using VNI as the RT for EBGP | |
3880 | * peering too. | |
3881 | */ | |
3882 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
3883 | if (!CHECK_FLAG(bgp_vrf->vrf_flags, | |
3884 | BGP_VRF_IMPORT_RT_CFGD)) | |
3885 | mask_ecom_global_admin(&eval_tmp, eval); | |
3886 | ||
3887 | irt = lookup_vrf_import_rt(&eval_tmp); | |
3888 | if (irt) | |
3889 | unmap_vrf_from_rt(bgp_vrf, irt); | |
3890 | } | |
3891 | } | |
3892 | } | |
3893 | ||
3894 | ||
128ea8ab | 3895 | /* |
3896 | * Map the RTs (configured or automatically derived) of a VNI to the VNI. | |
3897 | * The mapping will be used during route processing. | |
3898 | */ | |
d62a17ae | 3899 | void bgp_evpn_map_vni_to_its_rts(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 3900 | { |
d62a17ae | 3901 | int i; |
3902 | struct ecommunity_val *eval; | |
3903 | struct listnode *node, *nnode; | |
3904 | struct ecommunity *ecom; | |
128ea8ab | 3905 | |
d62a17ae | 3906 | for (ALL_LIST_ELEMENTS(vpn->import_rtl, node, nnode, ecom)) { |
3907 | for (i = 0; i < ecom->size; i++) { | |
3908 | eval = (struct ecommunity_val *)(ecom->val | |
3909 | + (i | |
3910 | * ECOMMUNITY_SIZE)); | |
3911 | map_vni_to_rt(bgp, vpn, eval); | |
3912 | } | |
3913 | } | |
128ea8ab | 3914 | } |
3915 | ||
3916 | /* | |
3917 | * Unmap the RTs (configured or automatically derived) of a VNI from the VNI. | |
3918 | */ | |
d62a17ae | 3919 | void bgp_evpn_unmap_vni_from_its_rts(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 3920 | { |
d62a17ae | 3921 | int i; |
3922 | struct ecommunity_val *eval; | |
3923 | struct listnode *node, *nnode; | |
3924 | struct ecommunity *ecom; | |
128ea8ab | 3925 | |
d62a17ae | 3926 | for (ALL_LIST_ELEMENTS(vpn->import_rtl, node, nnode, ecom)) { |
3927 | for (i = 0; i < ecom->size; i++) { | |
3928 | struct irt_node *irt; | |
3929 | struct ecommunity_val eval_tmp; | |
128ea8ab | 3930 | |
d62a17ae | 3931 | eval = (struct ecommunity_val *)(ecom->val |
3932 | + (i | |
3933 | * ECOMMUNITY_SIZE)); | |
3934 | /* If using "automatic" RT, we only care about the | |
3935 | * local-admin sub-field. | |
3936 | * This is to facilitate using VNI as the RT for EBGP | |
3937 | * peering too. | |
3938 | */ | |
3939 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
3940 | if (!is_import_rt_configured(vpn)) | |
3941 | mask_ecom_global_admin(&eval_tmp, eval); | |
128ea8ab | 3942 | |
d62a17ae | 3943 | irt = lookup_import_rt(bgp, &eval_tmp); |
3944 | if (irt) | |
3945 | unmap_vni_from_rt(bgp, vpn, irt); | |
3946 | } | |
3947 | } | |
128ea8ab | 3948 | } |
3949 | ||
3950 | /* | |
3951 | * Derive Import RT automatically for VNI and map VNI to RT. | |
3952 | * The mapping will be used during route processing. | |
3953 | */ | |
d62a17ae | 3954 | void bgp_evpn_derive_auto_rt_import(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 3955 | { |
c581d8b0 | 3956 | form_auto_rt(bgp, vpn->vni, vpn->import_rtl); |
d62a17ae | 3957 | UNSET_FLAG(vpn->flags, VNI_FLAG_IMPRT_CFGD); |
128ea8ab | 3958 | |
d62a17ae | 3959 | /* Map RT to VNI */ |
3960 | bgp_evpn_map_vni_to_its_rts(bgp, vpn); | |
128ea8ab | 3961 | } |
3962 | ||
3963 | /* | |
3964 | * Derive Export RT automatically for VNI. | |
3965 | */ | |
d62a17ae | 3966 | void bgp_evpn_derive_auto_rt_export(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 3967 | { |
c581d8b0 | 3968 | form_auto_rt(bgp, vpn->vni, vpn->export_rtl); |
d62a17ae | 3969 | UNSET_FLAG(vpn->flags, VNI_FLAG_EXPRT_CFGD); |
128ea8ab | 3970 | } |
3971 | ||
676f83b9 | 3972 | /* |
3973 | * Derive RD automatically for VNI using passed information - it | |
3974 | * is of the form RouterId:unique-id-for-vni. | |
3975 | */ | |
3976 | void bgp_evpn_derive_auto_rd_for_vrf(struct bgp *bgp) | |
3977 | { | |
3978 | char buf[100]; | |
3979 | ||
3980 | bgp->vrf_prd.family = AF_UNSPEC; | |
3981 | bgp->vrf_prd.prefixlen = 64; | |
3982 | sprintf(buf, "%s:%hu", inet_ntoa(bgp->router_id), bgp->vrf_rd_id); | |
3983 | str2prefix_rd(buf, &bgp->vrf_prd); | |
3984 | } | |
3985 | ||
128ea8ab | 3986 | /* |
3987 | * Derive RD automatically for VNI using passed information - it | |
3988 | * is of the form RouterId:unique-id-for-vni. | |
3989 | */ | |
d62a17ae | 3990 | void bgp_evpn_derive_auto_rd(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 3991 | { |
d62a17ae | 3992 | char buf[100]; |
128ea8ab | 3993 | |
d62a17ae | 3994 | vpn->prd.family = AF_UNSPEC; |
3995 | vpn->prd.prefixlen = 64; | |
3996 | sprintf(buf, "%s:%hu", inet_ntoa(bgp->router_id), vpn->rd_id); | |
cbb65f5e | 3997 | (void)str2prefix_rd(buf, &vpn->prd); |
d62a17ae | 3998 | UNSET_FLAG(vpn->flags, VNI_FLAG_RD_CFGD); |
128ea8ab | 3999 | } |
4000 | ||
4001 | /* | |
4002 | * Lookup VNI. | |
4003 | */ | |
d62a17ae | 4004 | struct bgpevpn *bgp_evpn_lookup_vni(struct bgp *bgp, vni_t vni) |
128ea8ab | 4005 | { |
d62a17ae | 4006 | struct bgpevpn *vpn; |
4007 | struct bgpevpn tmp; | |
128ea8ab | 4008 | |
d62a17ae | 4009 | memset(&tmp, 0, sizeof(struct bgpevpn)); |
4010 | tmp.vni = vni; | |
4011 | vpn = hash_lookup(bgp->vnihash, &tmp); | |
4012 | return vpn; | |
128ea8ab | 4013 | } |
4014 | ||
4015 | /* | |
4016 | * Create a new vpn - invoked upon configuration or zebra notification. | |
4017 | */ | |
d62a17ae | 4018 | struct bgpevpn *bgp_evpn_new(struct bgp *bgp, vni_t vni, |
29c53922 MK |
4019 | struct in_addr originator_ip, |
4020 | vrf_id_t tenant_vrf_id) | |
128ea8ab | 4021 | { |
d62a17ae | 4022 | struct bgpevpn *vpn; |
128ea8ab | 4023 | |
d62a17ae | 4024 | if (!bgp) |
4025 | return NULL; | |
128ea8ab | 4026 | |
d62a17ae | 4027 | vpn = XCALLOC(MTYPE_BGP_EVPN, sizeof(struct bgpevpn)); |
4028 | if (!vpn) | |
4029 | return NULL; | |
128ea8ab | 4030 | |
d62a17ae | 4031 | /* Set values - RD and RT set to defaults. */ |
4032 | vpn->vni = vni; | |
4033 | vpn->originator_ip = originator_ip; | |
29c53922 | 4034 | vpn->tenant_vrf_id = tenant_vrf_id; |
128ea8ab | 4035 | |
d62a17ae | 4036 | /* Initialize route-target import and export lists */ |
4037 | vpn->import_rtl = list_new(); | |
4038 | vpn->import_rtl->cmp = (int (*)(void *, void *))evpn_route_target_cmp; | |
4039 | vpn->export_rtl = list_new(); | |
4040 | vpn->export_rtl->cmp = (int (*)(void *, void *))evpn_route_target_cmp; | |
e9eb5f63 | 4041 | bf_assign_index(bm->rd_idspace, vpn->rd_id); |
d62a17ae | 4042 | derive_rd_rt_for_vni(bgp, vpn); |
128ea8ab | 4043 | |
d62a17ae | 4044 | /* Initialize EVPN route table. */ |
4045 | vpn->route_table = bgp_table_init(AFI_L2VPN, SAFI_EVPN); | |
128ea8ab | 4046 | |
d62a17ae | 4047 | /* Add to hash */ |
4048 | if (!hash_get(bgp->vnihash, vpn, hash_alloc_intern)) { | |
4049 | XFREE(MTYPE_BGP_EVPN, vpn); | |
4050 | return NULL; | |
4051 | } | |
6a8657d0 MK |
4052 | |
4053 | /* add to l2vni list on corresponding vrf */ | |
4054 | bgpevpn_link_to_l3vni(vpn); | |
4055 | ||
d62a17ae | 4056 | QOBJ_REG(vpn, bgpevpn); |
4057 | return vpn; | |
128ea8ab | 4058 | } |
4059 | ||
4060 | /* | |
4061 | * Free a given VPN - called in multiple scenarios such as zebra | |
4062 | * notification, configuration being deleted, advertise-all-vni disabled etc. | |
4063 | * This just frees appropriate memory, caller should have taken other | |
4064 | * needed actions. | |
4065 | */ | |
d62a17ae | 4066 | void bgp_evpn_free(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 4067 | { |
6a8657d0 | 4068 | bgpevpn_unlink_from_l3vni(vpn); |
d62a17ae | 4069 | bgp_table_unlock(vpn->route_table); |
4070 | bgp_evpn_unmap_vni_from_its_rts(bgp, vpn); | |
affe9e99 DS |
4071 | list_delete_and_null(&vpn->import_rtl); |
4072 | list_delete_and_null(&vpn->export_rtl); | |
e9eb5f63 | 4073 | bf_release_index(bm->rd_idspace, vpn->rd_id); |
d62a17ae | 4074 | hash_release(bgp->vnihash, vpn); |
4075 | QOBJ_UNREG(vpn); | |
4076 | XFREE(MTYPE_BGP_EVPN, vpn); | |
128ea8ab | 4077 | } |
4078 | ||
4079 | /* | |
4080 | * Import route into matching VNI(s). | |
4081 | */ | |
d62a17ae | 4082 | int bgp_evpn_import_route(struct bgp *bgp, afi_t afi, safi_t safi, |
4083 | struct prefix *p, struct bgp_info *ri) | |
128ea8ab | 4084 | { |
d62a17ae | 4085 | return install_uninstall_evpn_route(bgp, afi, safi, p, ri, 1); |
128ea8ab | 4086 | } |
4087 | ||
4088 | /* | |
4089 | * Unimport route from matching VNI(s). | |
4090 | */ | |
d62a17ae | 4091 | int bgp_evpn_unimport_route(struct bgp *bgp, afi_t afi, safi_t safi, |
4092 | struct prefix *p, struct bgp_info *ri) | |
128ea8ab | 4093 | { |
d62a17ae | 4094 | return install_uninstall_evpn_route(bgp, afi, safi, p, ri, 0); |
128ea8ab | 4095 | } |
4096 | ||
db0e1937 MK |
4097 | /* filter routes which have martian next hops */ |
4098 | int bgp_filter_evpn_routes_upon_martian_nh_change(struct bgp *bgp) | |
4099 | { | |
0291c246 MK |
4100 | afi_t afi; |
4101 | safi_t safi; | |
4102 | struct bgp_node *rd_rn, *rn; | |
4103 | struct bgp_table *table; | |
4104 | struct bgp_info *ri; | |
db0e1937 MK |
4105 | |
4106 | afi = AFI_L2VPN; | |
4107 | safi = SAFI_EVPN; | |
4108 | ||
4109 | /* Walk entire global routing table and evaluate routes which could be | |
4110 | * imported into this VPN. Note that we cannot just look at the routes | |
4111 | * for the VNI's RD - | |
4112 | * remote routes applicable for this VNI could have any RD. | |
4113 | */ | |
4114 | /* EVPN routes are a 2-level table. */ | |
4115 | for (rd_rn = bgp_table_top(bgp->rib[afi][safi]); rd_rn; | |
4116 | rd_rn = bgp_route_next(rd_rn)) { | |
4117 | table = (struct bgp_table *)(rd_rn->info); | |
4118 | if (!table) | |
4119 | continue; | |
4120 | ||
4121 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) { | |
4122 | ||
4123 | for (ri = rn->info; ri; ri = ri->next) { | |
4124 | ||
4125 | /* Consider "valid" remote routes applicable for | |
4126 | * this VNI. */ | |
4127 | if (!(ri->type == ZEBRA_ROUTE_BGP | |
4128 | && ri->sub_type == BGP_ROUTE_NORMAL)) | |
4129 | continue; | |
4130 | ||
60466a63 | 4131 | if (bgp_nexthop_self(bgp, ri->attr->nexthop)) { |
db0e1937 MK |
4132 | |
4133 | char attr_str[BUFSIZ]; | |
4134 | char pbuf[PREFIX_STRLEN]; | |
4135 | ||
4136 | bgp_dump_attr(ri->attr, attr_str, | |
4137 | BUFSIZ); | |
4138 | ||
4139 | if (bgp_debug_update(ri->peer, &rn->p, | |
4140 | NULL, 1)) | |
4141 | zlog_debug( | |
b682f6de | 4142 | "%u: prefix %s with attr %s - DENIED due to martian or self nexthop", |
db0e1937 MK |
4143 | bgp->vrf_id, |
4144 | prefix2str( | |
60466a63 | 4145 | &rn->p, pbuf, |
db0e1937 MK |
4146 | sizeof(pbuf)), |
4147 | attr_str); | |
4148 | ||
4149 | bgp_evpn_unimport_route(bgp, afi, safi, | |
4150 | &rn->p, ri); | |
4151 | ||
60466a63 QY |
4152 | bgp_rib_remove(rn, ri, ri->peer, afi, |
4153 | safi); | |
db0e1937 | 4154 | } |
db0e1937 MK |
4155 | } |
4156 | } | |
4157 | } | |
4158 | ||
4159 | return 0; | |
4160 | } | |
4161 | ||
128ea8ab | 4162 | /* |
4163 | * Handle del of a local MACIP. | |
4164 | */ | |
d62a17ae | 4165 | int bgp_evpn_local_macip_del(struct bgp *bgp, vni_t vni, struct ethaddr *mac, |
4166 | struct ipaddr *ip) | |
128ea8ab | 4167 | { |
d62a17ae | 4168 | struct bgpevpn *vpn; |
4169 | struct prefix_evpn p; | |
128ea8ab | 4170 | |
d62a17ae | 4171 | if (!bgp->vnihash) { |
4172 | zlog_err("%u: VNI hash not created", bgp->vrf_id); | |
4173 | return -1; | |
4174 | } | |
128ea8ab | 4175 | |
d62a17ae | 4176 | /* Lookup VNI hash - should exist. */ |
4177 | vpn = bgp_evpn_lookup_vni(bgp, vni); | |
4178 | if (!vpn || !is_vni_live(vpn)) { | |
4179 | zlog_warn("%u: VNI hash entry for VNI %u %s at MACIP DEL", | |
4180 | bgp->vrf_id, vni, vpn ? "not live" : "not found"); | |
4181 | return -1; | |
4182 | } | |
128ea8ab | 4183 | |
d62a17ae | 4184 | /* Remove EVPN type-2 route and schedule for processing. */ |
4185 | build_evpn_type2_prefix(&p, mac, ip); | |
4186 | delete_evpn_route(bgp, vpn, &p); | |
128ea8ab | 4187 | |
d62a17ae | 4188 | return 0; |
128ea8ab | 4189 | } |
4190 | ||
4191 | /* | |
4192 | * Handle add of a local MACIP. | |
4193 | */ | |
d62a17ae | 4194 | int bgp_evpn_local_macip_add(struct bgp *bgp, vni_t vni, struct ethaddr *mac, |
1a98c087 | 4195 | struct ipaddr *ip, u_char flags) |
128ea8ab | 4196 | { |
d62a17ae | 4197 | struct bgpevpn *vpn; |
4198 | struct prefix_evpn p; | |
128ea8ab | 4199 | |
d62a17ae | 4200 | if (!bgp->vnihash) { |
4201 | zlog_err("%u: VNI hash not created", bgp->vrf_id); | |
4202 | return -1; | |
4203 | } | |
128ea8ab | 4204 | |
d62a17ae | 4205 | /* Lookup VNI hash - should exist. */ |
4206 | vpn = bgp_evpn_lookup_vni(bgp, vni); | |
4207 | if (!vpn || !is_vni_live(vpn)) { | |
4208 | zlog_warn("%u: VNI hash entry for VNI %u %s at MACIP ADD", | |
4209 | bgp->vrf_id, vni, vpn ? "not live" : "not found"); | |
4210 | return -1; | |
4211 | } | |
128ea8ab | 4212 | |
d62a17ae | 4213 | /* Create EVPN type-2 route and schedule for processing. */ |
4214 | build_evpn_type2_prefix(&p, mac, ip); | |
1a98c087 | 4215 | if (update_evpn_route(bgp, vpn, &p, flags)) { |
d62a17ae | 4216 | char buf[ETHER_ADDR_STRLEN]; |
4217 | char buf2[INET6_ADDRSTRLEN]; | |
128ea8ab | 4218 | |
d62a17ae | 4219 | zlog_err( |
ead40654 | 4220 | "%u:Failed to create Type-2 route, VNI %u %s MAC %s IP %s (flags: 0x%x)", |
1a98c087 | 4221 | bgp->vrf_id, vpn->vni, |
996c9314 LB |
4222 | CHECK_FLAG(flags, ZEBRA_MACIP_TYPE_STICKY) |
4223 | ? "sticky gateway" | |
4224 | : "", | |
d62a17ae | 4225 | prefix_mac2str(mac, buf, sizeof(buf)), |
996c9314 | 4226 | ipaddr2str(ip, buf2, sizeof(buf2)), flags); |
d62a17ae | 4227 | return -1; |
4228 | } | |
128ea8ab | 4229 | |
d62a17ae | 4230 | return 0; |
128ea8ab | 4231 | } |
4232 | ||
6a8657d0 MK |
4233 | static void link_l2vni_hash_to_l3vni(struct hash_backet *backet, |
4234 | struct bgp *bgp_vrf) | |
4235 | { | |
4236 | struct bgpevpn *vpn = NULL; | |
4237 | struct bgp *bgp_def = NULL; | |
4238 | ||
4239 | bgp_def = bgp_get_default(); | |
4240 | assert(bgp_def); | |
4241 | ||
4242 | vpn = (struct bgpevpn *)backet->data; | |
4243 | if (vpn->tenant_vrf_id == bgp_vrf->vrf_id) | |
4244 | bgpevpn_link_to_l3vni(vpn); | |
4245 | } | |
4246 | ||
996c9314 LB |
4247 | int bgp_evpn_local_l3vni_add(vni_t l3vni, vrf_id_t vrf_id, struct ethaddr *rmac, |
4248 | struct in_addr originator_ip, int filter) | |
fe1dc5a3 MK |
4249 | { |
4250 | struct bgp *bgp_vrf = NULL; /* bgp VRF instance */ | |
4251 | struct bgp *bgp_def = NULL; /* default bgp instance */ | |
f1f8b53c MK |
4252 | struct listnode *node = NULL; |
4253 | struct bgpevpn *vpn = NULL; | |
fe1dc5a3 MK |
4254 | as_t as = 0; |
4255 | ||
4256 | /* get the default instamce - required to get the AS number for VRF | |
523cafc4 | 4257 | * auto-creatio |
4258 | */ | |
fe1dc5a3 MK |
4259 | bgp_def = bgp_get_default(); |
4260 | if (!bgp_def) { | |
996c9314 LB |
4261 | zlog_err( |
4262 | "Cannot process L3VNI %u ADD - default BGP instance not yet created", | |
4263 | l3vni); | |
fe1dc5a3 MK |
4264 | return -1; |
4265 | } | |
4266 | as = bgp_def->as; | |
4267 | ||
4268 | /* if the BGP vrf instance doesnt exist - create one */ | |
0b5131c9 | 4269 | bgp_vrf = bgp_lookup_by_name(vrf_id_to_name(vrf_id)); |
fe1dc5a3 MK |
4270 | if (!bgp_vrf) { |
4271 | ||
4272 | int ret = 0; | |
4273 | ||
4274 | ret = bgp_get(&bgp_vrf, &as, vrf_id_to_name(vrf_id), | |
4275 | BGP_INSTANCE_TYPE_VRF); | |
4276 | switch (ret) { | |
4277 | case BGP_ERR_MULTIPLE_INSTANCE_NOT_SET: | |
4278 | zlog_err("'bgp multiple-instance' not present\n"); | |
4279 | return -1; | |
4280 | case BGP_ERR_AS_MISMATCH: | |
4281 | zlog_err("BGP is already running; AS is %u\n", as); | |
4282 | return -1; | |
4283 | case BGP_ERR_INSTANCE_MISMATCH: | |
4284 | zlog_err("BGP instance name and AS number mismatch\n"); | |
4285 | return -1; | |
4286 | } | |
4287 | ||
4288 | /* mark as auto created */ | |
4289 | SET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_AUTO); | |
4290 | } | |
4291 | ||
4292 | /* associate with l3vni */ | |
4293 | bgp_vrf->l3vni = l3vni; | |
4294 | ||
4295 | /* set the router mac - to be used in mac-ip routes for this vrf */ | |
4296 | memcpy(&bgp_vrf->rmac, rmac, sizeof(struct ethaddr)); | |
4297 | ||
b67a60d2 | 4298 | /* set the originator ip */ |
4299 | bgp_vrf->originator_ip = originator_ip; | |
4300 | ||
c48d9f5f MK |
4301 | /* set the right filter - are we using l3vni only for prefix routes? */ |
4302 | if (filter) | |
4303 | SET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_L3VNI_PREFIX_ROUTES_ONLY); | |
4304 | ||
c581d8b0 MK |
4305 | /* auto derive RD/RT */ |
4306 | if (!CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_IMPORT_RT_CFGD)) | |
4307 | evpn_auto_rt_import_add_for_vrf(bgp_vrf); | |
4308 | if (!CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_EXPORT_RT_CFGD)) | |
4309 | evpn_auto_rt_export_add_for_vrf(bgp_vrf); | |
676f83b9 | 4310 | bgp_evpn_derive_auto_rd_for_vrf(bgp_vrf); |
fe1dc5a3 | 4311 | |
6a8657d0 MK |
4312 | /* link all corresponding l2vnis */ |
4313 | hash_iterate(bgp_def->vnihash, | |
996c9314 LB |
4314 | (void (*)(struct hash_backet *, |
4315 | void *))link_l2vni_hash_to_l3vni, | |
6a8657d0 MK |
4316 | bgp_vrf); |
4317 | ||
c48d9f5f MK |
4318 | /* Only update all corresponding type-2 routes if we are advertising two |
4319 | * labels along with type-2 routes | |
4320 | */ | |
4321 | if (!filter) | |
4322 | for (ALL_LIST_ELEMENTS_RO(bgp_vrf->l2vnis, node, vpn)) | |
4323 | update_routes_for_vni(bgp_def, vpn); | |
fe1dc5a3 | 4324 | |
06d2e8f3 MK |
4325 | /* advertise type-5 routes if needed */ |
4326 | update_advertise_vrf_routes(bgp_vrf); | |
4327 | ||
5ba238b7 MK |
4328 | /* install all remote routes belonging to this l3vni into correspondng |
4329 | * vrf */ | |
4330 | install_routes_for_vrf(bgp_vrf); | |
fe1dc5a3 MK |
4331 | |
4332 | return 0; | |
4333 | } | |
4334 | ||
996c9314 | 4335 | int bgp_evpn_local_l3vni_del(vni_t l3vni, vrf_id_t vrf_id) |
fe1dc5a3 MK |
4336 | { |
4337 | struct bgp *bgp_vrf = NULL; /* bgp vrf instance */ | |
f1f8b53c MK |
4338 | struct bgp *bgp_def = NULL; /* default bgp instance */ |
4339 | struct listnode *node = NULL; | |
4340 | struct bgpevpn *vpn = NULL; | |
fe1dc5a3 MK |
4341 | |
4342 | bgp_vrf = bgp_lookup_by_vrf_id(vrf_id); | |
4343 | if (!bgp_vrf) { | |
996c9314 LB |
4344 | zlog_err( |
4345 | "Cannot process L3VNI %u Del - Could not find BGP instance", | |
4346 | l3vni); | |
fe1dc5a3 MK |
4347 | return -1; |
4348 | } | |
4349 | ||
f1f8b53c MK |
4350 | bgp_def = bgp_get_default(); |
4351 | if (!bgp_def) { | |
996c9314 LB |
4352 | zlog_err( |
4353 | "Cannot process L3VNI %u Del - Could not find default BGP instance", | |
4354 | l3vni); | |
f1f8b53c MK |
4355 | return -1; |
4356 | } | |
4357 | ||
1eb88002 | 4358 | /* unimport remote routes from VRF, if it is AUTO vrf bgp_delete will |
523cafc4 | 4359 | * take care of uninstalling the routes from zebra |
4360 | */ | |
1eb88002 MK |
4361 | if (!CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_AUTO)) |
4362 | uninstall_routes_for_vrf(bgp_vrf); | |
5ba238b7 | 4363 | |
06d2e8f3 MK |
4364 | /* delete/withdraw all type-5 routes */ |
4365 | delete_withdraw_vrf_routes(bgp_vrf); | |
4366 | ||
fe1dc5a3 MK |
4367 | /* remove the l3vni from vrf instance */ |
4368 | bgp_vrf->l3vni = 0; | |
4369 | ||
4370 | /* remove the Rmac from the BGP vrf */ | |
4371 | memset(&bgp_vrf->rmac, 0, sizeof(struct ethaddr)); | |
4372 | ||
c581d8b0 | 4373 | /* delete RD/RT */ |
23a06e11 | 4374 | if (bgp_vrf->vrf_import_rtl && !list_isempty(bgp_vrf->vrf_import_rtl)) { |
10ebe1ab | 4375 | bgp_evpn_unmap_vrf_from_its_rts(bgp_vrf); |
5ba238b7 | 4376 | list_delete_all_node(bgp_vrf->vrf_import_rtl); |
23a06e11 MK |
4377 | } |
4378 | if (bgp_vrf->vrf_export_rtl && !list_isempty(bgp_vrf->vrf_export_rtl)) { | |
5ba238b7 | 4379 | list_delete_all_node(bgp_vrf->vrf_export_rtl); |
23a06e11 | 4380 | } |
fe1dc5a3 | 4381 | |
f1f8b53c | 4382 | /* update all corresponding local mac-ip routes */ |
c48d9f5f MK |
4383 | if (!CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_L3VNI_PREFIX_ROUTES_ONLY)) { |
4384 | for (ALL_LIST_ELEMENTS_RO(bgp_vrf->l2vnis, node, vpn)) { | |
4385 | UNSET_FLAG(vpn->flags, VNI_FLAG_USE_TWO_LABELS); | |
4386 | update_routes_for_vni(bgp_def, vpn); | |
4387 | } | |
4388 | } | |
fe1dc5a3 MK |
4389 | |
4390 | /* Delete the instance if it was autocreated */ | |
4391 | if (CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_AUTO)) | |
4392 | bgp_delete(bgp_vrf); | |
4393 | ||
4394 | return 0; | |
4395 | } | |
4396 | ||
128ea8ab | 4397 | /* |
4398 | * Handle del of a local VNI. | |
4399 | */ | |
d62a17ae | 4400 | int bgp_evpn_local_vni_del(struct bgp *bgp, vni_t vni) |
128ea8ab | 4401 | { |
d62a17ae | 4402 | struct bgpevpn *vpn; |
128ea8ab | 4403 | |
d62a17ae | 4404 | if (!bgp->vnihash) { |
4405 | zlog_err("%u: VNI hash not created", bgp->vrf_id); | |
4406 | return -1; | |
4407 | } | |
128ea8ab | 4408 | |
d62a17ae | 4409 | /* Locate VNI hash */ |
4410 | vpn = bgp_evpn_lookup_vni(bgp, vni); | |
4411 | if (!vpn) { | |
4412 | zlog_warn("%u: VNI hash entry for VNI %u not found at DEL", | |
4413 | bgp->vrf_id, vni); | |
4414 | return 0; | |
4415 | } | |
128ea8ab | 4416 | |
d62a17ae | 4417 | /* Remove all local EVPN routes and schedule for processing (to |
4418 | * withdraw from peers). | |
4419 | */ | |
4420 | delete_routes_for_vni(bgp, vpn); | |
128ea8ab | 4421 | |
db0e1937 MK |
4422 | /* |
4423 | * tunnel is no longer active, del tunnel ip address from tip_hash | |
4424 | */ | |
4425 | bgp_tip_del(bgp, &vpn->originator_ip); | |
4426 | ||
d62a17ae | 4427 | /* Clear "live" flag and see if hash needs to be freed. */ |
4428 | UNSET_FLAG(vpn->flags, VNI_FLAG_LIVE); | |
4429 | if (!is_vni_configured(vpn)) | |
4430 | bgp_evpn_free(bgp, vpn); | |
128ea8ab | 4431 | |
d62a17ae | 4432 | return 0; |
128ea8ab | 4433 | } |
4434 | ||
4435 | /* | |
d1911c26 | 4436 | * Handle add (or update) of a local VNI. The VNI changes we care |
4437 | * about are for the local-tunnel-ip and the (tenant) VRF. | |
128ea8ab | 4438 | */ |
d62a17ae | 4439 | int bgp_evpn_local_vni_add(struct bgp *bgp, vni_t vni, |
996c9314 | 4440 | struct in_addr originator_ip, vrf_id_t tenant_vrf_id) |
d62a17ae | 4441 | { |
4442 | struct bgpevpn *vpn; | |
4443 | struct prefix_evpn p; | |
4444 | ||
4445 | if (!bgp->vnihash) { | |
4446 | zlog_err("%u: VNI hash not created", bgp->vrf_id); | |
4447 | return -1; | |
4448 | } | |
4449 | ||
4450 | /* Lookup VNI. If present and no change, exit. */ | |
4451 | vpn = bgp_evpn_lookup_vni(bgp, vni); | |
ddd16ed5 | 4452 | if (vpn) { |
29c53922 | 4453 | |
d1911c26 | 4454 | if (is_vni_live(vpn) |
4455 | && IPV4_ADDR_SAME(&vpn->originator_ip, &originator_ip) | |
4456 | && vpn->tenant_vrf_id == tenant_vrf_id) | |
4457 | /* Probably some other param has changed that we don't | |
4458 | * care about. */ | |
4459 | return 0; | |
4460 | ||
4461 | /* Update tenant_vrf_id if it has changed. */ | |
6a8657d0 MK |
4462 | if (vpn->tenant_vrf_id != tenant_vrf_id) { |
4463 | bgpevpn_unlink_from_l3vni(vpn); | |
29c53922 | 4464 | vpn->tenant_vrf_id = tenant_vrf_id; |
6a8657d0 MK |
4465 | bgpevpn_link_to_l3vni(vpn); |
4466 | } | |
29c53922 | 4467 | |
d1911c26 | 4468 | /* If tunnel endpoint IP has changed, update (and delete prior |
4469 | * type-3 route, if needed.) | |
4470 | */ | |
4471 | if (!IPV4_ADDR_SAME(&vpn->originator_ip, &originator_ip)) | |
4472 | handle_tunnel_ip_change(bgp, vpn, originator_ip); | |
d62a17ae | 4473 | |
d1911c26 | 4474 | /* Update all routes with new endpoint IP and/or export RT |
4475 | * for VRFs | |
4476 | */ | |
4477 | if (is_vni_live(vpn)) | |
4478 | update_routes_for_vni(bgp, vpn); | |
d62a17ae | 4479 | } |
4480 | ||
4481 | /* Create or update as appropriate. */ | |
4482 | if (!vpn) { | |
29c53922 | 4483 | vpn = bgp_evpn_new(bgp, vni, originator_ip, tenant_vrf_id); |
d62a17ae | 4484 | if (!vpn) { |
4485 | zlog_err( | |
4486 | "%u: Failed to allocate VNI entry for VNI %u - at Add", | |
4487 | bgp->vrf_id, vni); | |
4488 | return -1; | |
4489 | } | |
4490 | } | |
4491 | ||
db0e1937 | 4492 | /* if the VNI is live already, there is nothing more to do */ |
ddd16ed5 MK |
4493 | if (is_vni_live(vpn)) |
4494 | return 0; | |
4495 | ||
d62a17ae | 4496 | /* Mark as "live" */ |
4497 | SET_FLAG(vpn->flags, VNI_FLAG_LIVE); | |
4498 | ||
db0e1937 MK |
4499 | /* tunnel is now active, add tunnel-ip to db */ |
4500 | bgp_tip_add(bgp, &originator_ip); | |
4501 | ||
4502 | /* filter routes as nexthop database has changed */ | |
4503 | bgp_filter_evpn_routes_upon_martian_nh_change(bgp); | |
4504 | ||
d62a17ae | 4505 | /* Create EVPN type-3 route and schedule for processing. */ |
4506 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
4507 | if (update_evpn_route(bgp, vpn, &p, 0)) { | |
4508 | zlog_err("%u: Type3 route creation failure for VNI %u", | |
4509 | bgp->vrf_id, vni); | |
4510 | return -1; | |
4511 | } | |
4512 | ||
4513 | /* If we have learnt and retained remote routes (VTEPs, MACs) for this | |
4514 | * VNI, | |
4515 | * install them. | |
4516 | */ | |
4517 | install_routes_for_vni(bgp, vpn); | |
4518 | ||
d7d97010 MK |
4519 | /* If we are advertising gateway mac-ip |
4520 | It needs to be conveyed again to zebra */ | |
4521 | bgp_zebra_advertise_gw_macip(bgp, vpn->advertise_gw_macip, vpn->vni); | |
4522 | ||
d62a17ae | 4523 | return 0; |
b18825eb | 4524 | } |
14c1a7bf | 4525 | |
7724c0a1 | 4526 | /* |
4527 | * Cleanup EVPN information on disable - Need to delete and withdraw | |
4528 | * EVPN routes from peers. | |
4529 | */ | |
d62a17ae | 4530 | void bgp_evpn_cleanup_on_disable(struct bgp *bgp) |
7724c0a1 | 4531 | { |
9d303b37 DL |
4532 | hash_iterate(bgp->vnihash, (void (*)(struct hash_backet *, |
4533 | void *))cleanup_vni_on_disable, | |
4534 | bgp); | |
7724c0a1 | 4535 | } |
4536 | ||
14c1a7bf | 4537 | /* |
4538 | * Cleanup EVPN information - invoked at the time of bgpd exit or when the | |
4539 | * BGP instance (default) is being freed. | |
4540 | */ | |
d62a17ae | 4541 | void bgp_evpn_cleanup(struct bgp *bgp) |
14c1a7bf | 4542 | { |
d62a17ae | 4543 | if (bgp->vnihash) |
9d303b37 DL |
4544 | hash_iterate(bgp->vnihash, (void (*)(struct hash_backet *, |
4545 | void *))free_vni_entry, | |
4546 | bgp); | |
d62a17ae | 4547 | if (bgp->import_rt_hash) |
4548 | hash_free(bgp->import_rt_hash); | |
4549 | bgp->import_rt_hash = NULL; | |
10ebe1ab MK |
4550 | if (bgp->vrf_import_rt_hash) |
4551 | hash_free(bgp->vrf_import_rt_hash); | |
4552 | bgp->vrf_import_rt_hash = NULL; | |
d62a17ae | 4553 | if (bgp->vnihash) |
4554 | hash_free(bgp->vnihash); | |
4555 | bgp->vnihash = NULL; | |
c581d8b0 | 4556 | if (bgp->vrf_import_rtl) |
bb7a24ab | 4557 | list_delete_and_null(&bgp->vrf_import_rtl); |
c581d8b0 | 4558 | if (bgp->vrf_export_rtl) |
bb7a24ab | 4559 | list_delete_and_null(&bgp->vrf_export_rtl); |
6a8657d0 | 4560 | if (bgp->l2vnis) |
bb7a24ab | 4561 | list_delete_and_null(&bgp->l2vnis); |
676f83b9 | 4562 | bf_release_index(bm->rd_idspace, bgp->vrf_rd_id); |
14c1a7bf | 4563 | } |
4564 | ||
4565 | /* | |
4566 | * Initialization for EVPN | |
4567 | * Create | |
4568 | * VNI hash table | |
4569 | * hash for RT to VNI | |
676f83b9 | 4570 | * assign a unique rd id for auto derivation of vrf_prd |
14c1a7bf | 4571 | */ |
d62a17ae | 4572 | void bgp_evpn_init(struct bgp *bgp) |
4573 | { | |
4574 | bgp->vnihash = | |
4575 | hash_create(vni_hash_key_make, vni_hash_cmp, "BGP VNI Hash"); | |
4576 | bgp->import_rt_hash = | |
4577 | hash_create(import_rt_hash_key_make, import_rt_hash_cmp, | |
4578 | "BGP Import RT Hash"); | |
10ebe1ab MK |
4579 | bgp->vrf_import_rt_hash = |
4580 | hash_create(vrf_import_rt_hash_key_make, vrf_import_rt_hash_cmp, | |
4581 | "BGP VRF Import RT Hash"); | |
c581d8b0 MK |
4582 | bgp->vrf_import_rtl = list_new(); |
4583 | bgp->vrf_import_rtl->cmp = | |
4584 | (int (*)(void *, void *))evpn_route_target_cmp; | |
4585 | ||
4586 | bgp->vrf_export_rtl = list_new(); | |
4587 | bgp->vrf_export_rtl->cmp = | |
4588 | (int (*)(void *, void *))evpn_route_target_cmp; | |
6a8657d0 | 4589 | bgp->l2vnis = list_new(); |
996c9314 | 4590 | bgp->l2vnis->cmp = (int (*)(void *, void *))vni_hash_cmp; |
676f83b9 | 4591 | bf_assign_index(bm->rd_idspace, bgp->vrf_rd_id); |
14c1a7bf | 4592 | } |
10ebe1ab MK |
4593 | |
4594 | void bgp_evpn_vrf_delete(struct bgp *bgp_vrf) | |
4595 | { | |
4596 | bgp_evpn_unmap_vrf_from_its_rts(bgp_vrf); | |
4597 | } |