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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 | */ | |
196 | static int is_vrf_present_in_irt_vrfs(struct list *vrfs, | |
197 | struct bgp *bgp_vrf) | |
198 | { | |
199 | struct listnode *node = NULL, *nnode = NULL; | |
200 | struct bgp *tmp_bgp_vrf = NULL; | |
201 | ||
202 | for (ALL_LIST_ELEMENTS(vrfs, node, nnode, tmp_bgp_vrf)) { | |
203 | if (tmp_bgp_vrf == bgp_vrf) | |
204 | return 1; | |
205 | } | |
206 | return 0; | |
207 | } | |
208 | ||
14c1a7bf | 209 | /* |
210 | * Make import route target hash key. | |
211 | */ | |
d62a17ae | 212 | static unsigned int import_rt_hash_key_make(void *p) |
14c1a7bf | 213 | { |
d62a17ae | 214 | struct irt_node *irt = p; |
215 | char *pnt = irt->rt.val; | |
5a1b3fb5 DS |
216 | |
217 | return jhash(pnt, 8, 0xdeadbeef); | |
14c1a7bf | 218 | } |
219 | ||
220 | /* | |
221 | * Comparison function for import rt hash | |
222 | */ | |
d62a17ae | 223 | static int import_rt_hash_cmp(const void *p1, const void *p2) |
14c1a7bf | 224 | { |
d62a17ae | 225 | const struct irt_node *irt1 = p1; |
226 | const struct irt_node *irt2 = p2; | |
14c1a7bf | 227 | |
d62a17ae | 228 | if (irt1 == NULL && irt2 == NULL) |
229 | return 1; | |
14c1a7bf | 230 | |
d62a17ae | 231 | if (irt1 == NULL || irt2 == NULL) |
232 | return 0; | |
14c1a7bf | 233 | |
d62a17ae | 234 | return (memcmp(irt1->rt.val, irt2->rt.val, ECOMMUNITY_SIZE) == 0); |
14c1a7bf | 235 | } |
236 | ||
7724c0a1 | 237 | /* |
128ea8ab | 238 | * Create a new import_rt |
239 | */ | |
d62a17ae | 240 | static struct irt_node *import_rt_new(struct bgp *bgp, |
241 | struct ecommunity_val *rt) | |
128ea8ab | 242 | { |
d62a17ae | 243 | struct irt_node *irt; |
128ea8ab | 244 | |
d62a17ae | 245 | if (!bgp) |
246 | return NULL; | |
128ea8ab | 247 | |
d62a17ae | 248 | irt = XCALLOC(MTYPE_BGP_EVPN_IMPORT_RT, sizeof(struct irt_node)); |
249 | if (!irt) | |
250 | return NULL; | |
128ea8ab | 251 | |
d62a17ae | 252 | irt->rt = *rt; |
253 | irt->vnis = list_new(); | |
128ea8ab | 254 | |
d62a17ae | 255 | /* Add to hash */ |
256 | if (!hash_get(bgp->import_rt_hash, irt, hash_alloc_intern)) { | |
257 | XFREE(MTYPE_BGP_EVPN_IMPORT_RT, irt); | |
258 | return NULL; | |
259 | } | |
128ea8ab | 260 | |
d62a17ae | 261 | return irt; |
128ea8ab | 262 | } |
263 | ||
264 | /* | |
265 | * Free the import rt node | |
7724c0a1 | 266 | */ |
d62a17ae | 267 | static void import_rt_free(struct bgp *bgp, struct irt_node *irt) |
7724c0a1 | 268 | { |
d62a17ae | 269 | hash_release(bgp->import_rt_hash, irt); |
270 | XFREE(MTYPE_BGP_EVPN_IMPORT_RT, irt); | |
7724c0a1 | 271 | } |
272 | ||
14c1a7bf | 273 | /* |
128ea8ab | 274 | * Function to lookup Import RT node - used to map a RT to set of |
275 | * VNIs importing routes with that RT. | |
276 | */ | |
d62a17ae | 277 | static struct irt_node *lookup_import_rt(struct bgp *bgp, |
278 | struct ecommunity_val *rt) | |
128ea8ab | 279 | { |
d62a17ae | 280 | struct irt_node *irt; |
281 | struct irt_node tmp; | |
128ea8ab | 282 | |
d62a17ae | 283 | memset(&tmp, 0, sizeof(struct irt_node)); |
284 | memcpy(&tmp.rt, rt, ECOMMUNITY_SIZE); | |
285 | irt = hash_lookup(bgp->import_rt_hash, &tmp); | |
286 | return irt; | |
128ea8ab | 287 | } |
288 | ||
289 | /* | |
290 | * Is specified VNI present on the RT's list of "importing" VNIs? | |
291 | */ | |
d62a17ae | 292 | static int is_vni_present_in_irt_vnis(struct list *vnis, struct bgpevpn *vpn) |
128ea8ab | 293 | { |
d62a17ae | 294 | struct listnode *node, *nnode; |
295 | struct bgpevpn *tmp_vpn; | |
128ea8ab | 296 | |
d62a17ae | 297 | for (ALL_LIST_ELEMENTS(vnis, node, nnode, tmp_vpn)) { |
298 | if (tmp_vpn == vpn) | |
299 | return 1; | |
300 | } | |
128ea8ab | 301 | |
d62a17ae | 302 | return 0; |
128ea8ab | 303 | } |
304 | ||
305 | /* | |
306 | * Compare Route Targets. | |
307 | */ | |
d62a17ae | 308 | static int evpn_route_target_cmp(struct ecommunity *ecom1, |
309 | struct ecommunity *ecom2) | |
128ea8ab | 310 | { |
d62a17ae | 311 | if (ecom1 && !ecom2) |
312 | return -1; | |
128ea8ab | 313 | |
d62a17ae | 314 | if (!ecom1 && ecom2) |
315 | return 1; | |
128ea8ab | 316 | |
d62a17ae | 317 | if (!ecom1 && !ecom2) |
318 | return 0; | |
128ea8ab | 319 | |
d62a17ae | 320 | if (ecom1->str && !ecom2->str) |
321 | return -1; | |
128ea8ab | 322 | |
d62a17ae | 323 | if (!ecom1->str && ecom2->str) |
324 | return 1; | |
128ea8ab | 325 | |
d62a17ae | 326 | if (!ecom1->str && !ecom2->str) |
327 | return 0; | |
128ea8ab | 328 | |
d62a17ae | 329 | return strcmp(ecom1->str, ecom2->str); |
128ea8ab | 330 | } |
331 | ||
332 | /* | |
333 | * Mask off global-admin field of specified extended community (RT), | |
334 | * just retain the local-admin field. | |
335 | */ | |
d62a17ae | 336 | static inline void mask_ecom_global_admin(struct ecommunity_val *dst, |
337 | struct ecommunity_val *src) | |
128ea8ab | 338 | { |
d62a17ae | 339 | u_char type; |
128ea8ab | 340 | |
d62a17ae | 341 | type = src->val[0]; |
342 | dst->val[0] = 0; | |
343 | if (type == ECOMMUNITY_ENCODE_AS) { | |
344 | dst->val[2] = dst->val[3] = 0; | |
345 | } else if (type == ECOMMUNITY_ENCODE_AS4 | |
346 | || type == ECOMMUNITY_ENCODE_IP) { | |
347 | dst->val[2] = dst->val[3] = 0; | |
348 | dst->val[4] = dst->val[5] = 0; | |
349 | } | |
128ea8ab | 350 | } |
351 | ||
10ebe1ab MK |
352 | /* |
353 | * Map one RT to specified VRF. | |
354 | * bgp_vrf = BGP vrf instance | |
355 | */ | |
356 | static void map_vrf_to_rt(struct bgp *bgp_vrf, | |
357 | struct ecommunity_val *eval) | |
358 | { | |
359 | struct vrf_irt_node *irt = NULL; | |
360 | struct ecommunity_val eval_tmp; | |
361 | ||
362 | /* If using "automatic" RT, | |
363 | * we only care about the local-admin sub-field. | |
364 | * This is to facilitate using L3VNI(VRF-VNI) | |
365 | * as the RT for EBGP peering too. | |
366 | */ | |
367 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
368 | if (!CHECK_FLAG(bgp_vrf->vrf_flags, | |
369 | BGP_VRF_IMPORT_RT_CFGD)) | |
370 | mask_ecom_global_admin(&eval_tmp, eval); | |
371 | ||
372 | irt = lookup_vrf_import_rt(&eval_tmp); | |
373 | if (irt && irt->vrfs) | |
374 | if (is_vrf_present_in_irt_vrfs(irt->vrfs, bgp_vrf)) | |
375 | /* Already mapped. */ | |
376 | return; | |
377 | ||
378 | if (!irt) { | |
379 | irt = vrf_import_rt_new(&eval_tmp); | |
380 | assert(irt); | |
381 | } | |
382 | ||
383 | /* Add VRF to the list for this RT. */ | |
384 | listnode_add(irt->vrfs, bgp_vrf); | |
385 | } | |
386 | ||
387 | /* | |
388 | * Unmap specified VRF from specified RT. If there are no other | |
389 | * VRFs for this RT, then the RT hash is deleted. | |
390 | * bgp_vrf: BGP VRF specific instance | |
391 | */ | |
392 | static void unmap_vrf_from_rt(struct bgp *bgp_vrf, | |
393 | struct vrf_irt_node *irt) | |
394 | { | |
395 | /* Delete VRF from list for this RT. */ | |
396 | listnode_delete(irt->vrfs, bgp_vrf); | |
397 | if (!listnode_head(irt->vrfs)) { | |
bb7a24ab | 398 | list_delete_and_null(&irt->vrfs); |
10ebe1ab MK |
399 | vrf_import_rt_free(irt); |
400 | } | |
401 | } | |
402 | ||
128ea8ab | 403 | /* |
404 | * Map one RT to specified VNI. | |
14c1a7bf | 405 | */ |
d62a17ae | 406 | static void map_vni_to_rt(struct bgp *bgp, struct bgpevpn *vpn, |
407 | struct ecommunity_val *eval) | |
128ea8ab | 408 | { |
d62a17ae | 409 | struct irt_node *irt; |
410 | struct ecommunity_val eval_tmp; | |
128ea8ab | 411 | |
d62a17ae | 412 | /* If using "automatic" RT, we only care about the local-admin |
413 | * sub-field. | |
414 | * This is to facilitate using VNI as the RT for EBGP peering too. | |
415 | */ | |
416 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
417 | if (!is_import_rt_configured(vpn)) | |
418 | mask_ecom_global_admin(&eval_tmp, eval); | |
128ea8ab | 419 | |
d62a17ae | 420 | irt = lookup_import_rt(bgp, &eval_tmp); |
421 | if (irt && irt->vnis) | |
422 | if (is_vni_present_in_irt_vnis(irt->vnis, vpn)) | |
423 | /* Already mapped. */ | |
424 | return; | |
128ea8ab | 425 | |
d62a17ae | 426 | if (!irt) { |
427 | irt = import_rt_new(bgp, &eval_tmp); | |
428 | assert(irt); | |
429 | } | |
128ea8ab | 430 | |
d62a17ae | 431 | /* Add VNI to the hash list for this RT. */ |
432 | listnode_add(irt->vnis, vpn); | |
128ea8ab | 433 | } |
434 | ||
435 | /* | |
436 | * Unmap specified VNI from specified RT. If there are no other | |
437 | * VNIs for this RT, then the RT hash is deleted. | |
438 | */ | |
d62a17ae | 439 | static void unmap_vni_from_rt(struct bgp *bgp, struct bgpevpn *vpn, |
440 | struct irt_node *irt) | |
14c1a7bf | 441 | { |
d62a17ae | 442 | /* Delete VNI from hash list for this RT. */ |
443 | listnode_delete(irt->vnis, vpn); | |
444 | if (!listnode_head(irt->vnis)) { | |
acdf5e25 | 445 | list_delete_and_null(&irt->vnis); |
d62a17ae | 446 | import_rt_free(bgp, irt); |
447 | } | |
14c1a7bf | 448 | } |
449 | ||
128ea8ab | 450 | /* |
451 | * Create RT extended community automatically from passed information: | |
452 | * of the form AS:VNI. | |
453 | * NOTE: We use only the lower 16 bits of the AS. This is sufficient as | |
454 | * the need is to get a RT value that will be unique across different | |
455 | * VNIs but the same across routers (in the same AS) for a particular | |
456 | * VNI. | |
457 | */ | |
c581d8b0 | 458 | static void form_auto_rt(struct bgp *bgp, vni_t vni, struct list *rtl) |
128ea8ab | 459 | { |
d62a17ae | 460 | struct ecommunity_val eval; |
461 | struct ecommunity *ecomadd; | |
128ea8ab | 462 | |
c581d8b0 | 463 | encode_route_target_as((bgp->as & 0xFFFF), vni, &eval); |
128ea8ab | 464 | |
d62a17ae | 465 | ecomadd = ecommunity_new(); |
466 | ecommunity_add_val(ecomadd, &eval); | |
467 | listnode_add_sort(rtl, ecomadd); | |
128ea8ab | 468 | } |
14c1a7bf | 469 | |
470 | /* | |
128ea8ab | 471 | * Derive RD and RT for a VNI automatically. Invoked at the time of |
472 | * creation of a VNI. | |
473 | */ | |
d62a17ae | 474 | static void derive_rd_rt_for_vni(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 475 | { |
d62a17ae | 476 | bgp_evpn_derive_auto_rd(bgp, vpn); |
477 | bgp_evpn_derive_auto_rt_import(bgp, vpn); | |
478 | bgp_evpn_derive_auto_rt_export(bgp, vpn); | |
128ea8ab | 479 | } |
480 | ||
481 | /* | |
482 | * Add (update) or delete MACIP from zebra. | |
14c1a7bf | 483 | */ |
d62a17ae | 484 | static int bgp_zebra_send_remote_macip(struct bgp *bgp, struct bgpevpn *vpn, |
485 | struct prefix_evpn *p, | |
486 | struct in_addr remote_vtep_ip, int add, | |
ead40654 | 487 | u_char flags) |
d62a17ae | 488 | { |
489 | struct stream *s; | |
490 | int ipa_len; | |
491 | char buf1[ETHER_ADDR_STRLEN]; | |
492 | char buf2[INET6_ADDRSTRLEN]; | |
493 | char buf3[INET6_ADDRSTRLEN]; | |
494 | ||
495 | /* Check socket. */ | |
496 | if (!zclient || zclient->sock < 0) | |
497 | return 0; | |
498 | ||
499 | /* Don't try to register if Zebra doesn't know of this instance. */ | |
500 | if (!IS_BGP_INST_KNOWN_TO_ZEBRA(bgp)) | |
501 | return 0; | |
502 | ||
503 | s = zclient->obuf; | |
504 | stream_reset(s); | |
505 | ||
421bb26a MK |
506 | zclient_create_header(s, add ? ZEBRA_REMOTE_MACIP_ADD |
507 | : ZEBRA_REMOTE_MACIP_DEL, | |
508 | bgp->vrf_id); | |
d62a17ae | 509 | stream_putl(s, vpn->vni); |
28328ea9 | 510 | stream_put(s, &p->prefix.mac.octet, ETH_ALEN); /* Mac Addr */ |
d62a17ae | 511 | /* IP address length and IP address, if any. */ |
512 | if (IS_EVPN_PREFIX_IPADDR_NONE(p)) | |
513 | stream_putl(s, 0); | |
514 | else { | |
515 | ipa_len = IS_EVPN_PREFIX_IPADDR_V4(p) ? IPV4_MAX_BYTELEN | |
516 | : IPV6_MAX_BYTELEN; | |
517 | stream_putl(s, ipa_len); | |
518 | stream_put(s, &p->prefix.ip.ip.addr, ipa_len); | |
519 | } | |
520 | stream_put_in_addr(s, &remote_vtep_ip); | |
521 | ||
ead40654 | 522 | /* TX flags - MAC sticky status and/or gateway mac */ |
d62a17ae | 523 | if (add) |
ead40654 | 524 | stream_putc(s, flags); |
d62a17ae | 525 | |
526 | stream_putw_at(s, 0, stream_get_endp(s)); | |
527 | ||
528 | if (bgp_debug_zebra(NULL)) | |
ead40654 | 529 | zlog_debug("Tx %s MACIP, VNI %u MAC %s IP %s (flags: 0x%x) remote VTEP %s", |
d62a17ae | 530 | add ? "ADD" : "DEL", vpn->vni, |
d62a17ae | 531 | prefix_mac2str(&p->prefix.mac, buf1, sizeof(buf1)), |
532 | ipaddr2str(&p->prefix.ip, buf3, sizeof(buf3)), | |
ead40654 | 533 | flags, |
d62a17ae | 534 | inet_ntop(AF_INET, &remote_vtep_ip, buf2, |
535 | sizeof(buf2))); | |
536 | ||
537 | return zclient_send_message(zclient); | |
7ef5a232 | 538 | } |
b18825eb | 539 | |
128ea8ab | 540 | /* |
541 | * Add (update) or delete remote VTEP from zebra. | |
542 | */ | |
d62a17ae | 543 | static int bgp_zebra_send_remote_vtep(struct bgp *bgp, struct bgpevpn *vpn, |
544 | struct prefix_evpn *p, int add) | |
128ea8ab | 545 | { |
d62a17ae | 546 | struct stream *s; |
128ea8ab | 547 | |
d62a17ae | 548 | /* Check socket. */ |
549 | if (!zclient || zclient->sock < 0) | |
550 | return 0; | |
128ea8ab | 551 | |
d62a17ae | 552 | /* Don't try to register if Zebra doesn't know of this instance. */ |
553 | if (!IS_BGP_INST_KNOWN_TO_ZEBRA(bgp)) | |
554 | return 0; | |
128ea8ab | 555 | |
d62a17ae | 556 | s = zclient->obuf; |
557 | stream_reset(s); | |
128ea8ab | 558 | |
421bb26a MK |
559 | zclient_create_header(s, add ? ZEBRA_REMOTE_VTEP_ADD |
560 | : ZEBRA_REMOTE_VTEP_DEL, | |
561 | bgp->vrf_id); | |
d62a17ae | 562 | stream_putl(s, vpn->vni); |
563 | if (IS_EVPN_PREFIX_IPADDR_V4(p)) | |
564 | stream_put_in_addr(s, &p->prefix.ip.ipaddr_v4); | |
565 | else if (IS_EVPN_PREFIX_IPADDR_V6(p)) { | |
566 | zlog_err( | |
567 | "Bad remote IP when trying to %s remote VTEP for VNI %u", | |
568 | add ? "ADD" : "DEL", vpn->vni); | |
569 | return -1; | |
570 | } | |
128ea8ab | 571 | |
d62a17ae | 572 | stream_putw_at(s, 0, stream_get_endp(s)); |
128ea8ab | 573 | |
d62a17ae | 574 | if (bgp_debug_zebra(NULL)) |
575 | zlog_debug("Tx %s Remote VTEP, VNI %u remote VTEP %s", | |
576 | add ? "ADD" : "DEL", vpn->vni, | |
577 | inet_ntoa(p->prefix.ip.ipaddr_v4)); | |
128ea8ab | 578 | |
d62a17ae | 579 | return zclient_send_message(zclient); |
128ea8ab | 580 | } |
581 | ||
342dd0c6 | 582 | /* |
583 | * Build extended communities for EVPN prefix route. | |
584 | */ | |
585 | static void build_evpn_type5_route_extcomm(struct bgp *bgp_vrf, | |
586 | struct attr *attr) | |
587 | { | |
588 | struct ecommunity ecom_encap; | |
589 | struct ecommunity ecom_rmac; | |
590 | struct ecommunity_val eval; | |
591 | struct ecommunity_val eval_rmac; | |
592 | bgp_encap_types tnl_type; | |
593 | struct listnode *node, *nnode; | |
594 | struct ecommunity *ecom; | |
595 | struct list *vrf_export_rtl = NULL; | |
596 | ||
597 | /* Encap */ | |
598 | tnl_type = BGP_ENCAP_TYPE_VXLAN; | |
599 | memset(&ecom_encap, 0, sizeof(ecom_encap)); | |
600 | encode_encap_extcomm(tnl_type, &eval); | |
601 | ecom_encap.size = 1; | |
602 | ecom_encap.val = (u_int8_t *)eval.val; | |
603 | ||
604 | /* Add Encap */ | |
605 | attr->ecommunity = ecommunity_dup(&ecom_encap); | |
606 | ||
607 | /* Add the export RTs for L3VNI/VRF */ | |
608 | vrf_export_rtl = bgp_vrf->vrf_export_rtl; | |
609 | if (vrf_export_rtl && !list_isempty(vrf_export_rtl)) { | |
610 | for (ALL_LIST_ELEMENTS(vrf_export_rtl, node, nnode, ecom)) | |
611 | attr->ecommunity = ecommunity_merge(attr->ecommunity, | |
612 | ecom); | |
613 | } | |
614 | ||
615 | /* add the router mac extended community */ | |
616 | if (!is_zero_mac(&attr->rmac)) { | |
617 | memset(&ecom_rmac, 0, sizeof(ecom_rmac)); | |
618 | encode_rmac_extcomm(&eval_rmac, &attr->rmac); | |
619 | ecom_rmac.size = 1; | |
620 | ecom_rmac.val = (uint8_t *)eval_rmac.val; | |
621 | attr->ecommunity = ecommunity_merge(attr->ecommunity, | |
622 | &ecom_rmac); | |
623 | } | |
624 | ||
625 | attr->flag |= ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES); | |
626 | } | |
627 | ||
128ea8ab | 628 | /* |
629 | * Build extended communities for EVPN route. RT and ENCAP are | |
630 | * applicable to all routes. | |
7ec156a9 MK |
631 | * TODO: currently kernel doesnt support ipv6 routes with ipv4 nexthops. |
632 | * This means that we can't do symmetric routing for ipv6 hosts routes | |
633 | * in the same way as ipv4 host routes. | |
634 | * We wont attach l3-vni related RTs for ipv6 routes. | |
635 | * For now, We will only adevrtise ipv4 host routes | |
636 | * with L3-VNI related ext-comm. | |
128ea8ab | 637 | */ |
7ec156a9 MK |
638 | static void build_evpn_route_extcomm(struct bgpevpn *vpn, struct attr *attr, |
639 | afi_t afi) | |
128ea8ab | 640 | { |
d62a17ae | 641 | struct ecommunity ecom_encap; |
642 | struct ecommunity ecom_sticky; | |
ead40654 | 643 | struct ecommunity ecom_default_gw; |
bc59a672 | 644 | struct ecommunity ecom_rmac; |
d62a17ae | 645 | struct ecommunity_val eval; |
646 | struct ecommunity_val eval_sticky; | |
ead40654 | 647 | struct ecommunity_val eval_default_gw; |
bc59a672 | 648 | struct ecommunity_val eval_rmac; |
d62a17ae | 649 | bgp_encap_types tnl_type; |
650 | struct listnode *node, *nnode; | |
651 | struct ecommunity *ecom; | |
652 | u_int32_t seqnum; | |
7a3e76f1 | 653 | struct list *vrf_export_rtl = NULL; |
128ea8ab | 654 | |
d62a17ae | 655 | /* Encap */ |
656 | tnl_type = BGP_ENCAP_TYPE_VXLAN; | |
657 | memset(&ecom_encap, 0, sizeof(ecom_encap)); | |
658 | encode_encap_extcomm(tnl_type, &eval); | |
659 | ecom_encap.size = 1; | |
660 | ecom_encap.val = (u_int8_t *)eval.val; | |
128ea8ab | 661 | |
d62a17ae | 662 | /* Add Encap */ |
663 | attr->ecommunity = ecommunity_dup(&ecom_encap); | |
128ea8ab | 664 | |
7a3e76f1 | 665 | /* Add the export RTs for L2VNI */ |
d62a17ae | 666 | for (ALL_LIST_ELEMENTS(vpn->export_rtl, node, nnode, ecom)) |
667 | attr->ecommunity = ecommunity_merge(attr->ecommunity, ecom); | |
128ea8ab | 668 | |
c48d9f5f MK |
669 | /* |
670 | * only attach l3-vni export rts for ipv4 address family and if we are | |
671 | * advertising both the labels in type-2 routes | |
523cafc4 | 672 | */ |
c48d9f5f | 673 | if (afi == AFI_IP && CHECK_FLAG(vpn->flags, VNI_FLAG_USE_TWO_LABELS)) { |
7ec156a9 MK |
674 | vrf_export_rtl = bgpevpn_get_vrf_export_rtl(vpn); |
675 | if (vrf_export_rtl && !list_isempty(vrf_export_rtl)) { | |
676 | for (ALL_LIST_ELEMENTS(vrf_export_rtl, node, nnode, | |
677 | ecom)) | |
678 | attr->ecommunity = | |
679 | ecommunity_merge(attr->ecommunity, | |
680 | ecom); | |
681 | } | |
f1f8b53c | 682 | } |
7a3e76f1 | 683 | |
d62a17ae | 684 | if (attr->sticky) { |
685 | seqnum = 0; | |
686 | memset(&ecom_sticky, 0, sizeof(ecom_sticky)); | |
687 | encode_mac_mobility_extcomm(1, seqnum, &eval_sticky); | |
688 | ecom_sticky.size = 1; | |
689 | ecom_sticky.val = (u_int8_t *)eval_sticky.val; | |
690 | attr->ecommunity = | |
691 | ecommunity_merge(attr->ecommunity, &ecom_sticky); | |
692 | } | |
c85c03c7 | 693 | |
c48d9f5f MK |
694 | /* |
695 | * only attach l3-vni rmac for ipv4 address family and if we are | |
696 | * advertising both the labels in type-2 routes | |
697 | */ | |
698 | if (afi == AFI_IP && !is_zero_mac(&attr->rmac) && | |
699 | CHECK_FLAG(vpn->flags, VNI_FLAG_USE_TWO_LABELS)) { | |
bc59a672 MK |
700 | memset(&ecom_rmac, 0, sizeof(ecom_rmac)); |
701 | encode_rmac_extcomm(&eval_rmac, &attr->rmac); | |
702 | ecom_rmac.size = 1; | |
703 | ecom_rmac.val = (uint8_t *)eval_rmac.val; | |
704 | attr->ecommunity = ecommunity_merge(attr->ecommunity, | |
705 | &ecom_rmac); | |
706 | } | |
707 | ||
ead40654 MK |
708 | if (attr->default_gw) { |
709 | memset(&ecom_default_gw, 0, sizeof(ecom_default_gw)); | |
710 | encode_default_gw_extcomm(&eval_default_gw); | |
711 | ecom_default_gw.size = 1; | |
712 | ecom_default_gw.val = (uint8_t *)eval_default_gw.val; | |
713 | attr->ecommunity = ecommunity_merge(attr->ecommunity, | |
714 | &ecom_default_gw); | |
715 | } | |
716 | ||
d62a17ae | 717 | attr->flag |= ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES); |
128ea8ab | 718 | } |
719 | ||
720 | /* | |
721 | * Add MAC mobility extended community to attribute. | |
722 | */ | |
d62a17ae | 723 | static void add_mac_mobility_to_attr(u_int32_t seq_num, struct attr *attr) |
724 | { | |
725 | struct ecommunity ecom_tmp; | |
726 | struct ecommunity_val eval; | |
421bb26a | 727 | u_int8_t *ecom_val_ptr; |
d62a17ae | 728 | int i; |
729 | u_int8_t *pnt; | |
730 | int type = 0; | |
731 | int sub_type = 0; | |
732 | ||
733 | /* Build MM */ | |
734 | encode_mac_mobility_extcomm(0, seq_num, &eval); | |
735 | ||
736 | /* Find current MM ecommunity */ | |
421bb26a | 737 | ecom_val_ptr = NULL; |
d62a17ae | 738 | |
739 | if (attr->ecommunity) { | |
740 | for (i = 0; i < attr->ecommunity->size; i++) { | |
741 | pnt = attr->ecommunity->val + (i * 8); | |
742 | type = *pnt++; | |
743 | sub_type = *pnt++; | |
744 | ||
745 | if (type == ECOMMUNITY_ENCODE_EVPN | |
746 | && sub_type | |
747 | == ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY) { | |
421bb26a MK |
748 | ecom_val_ptr = |
749 | (u_int8_t *)(attr->ecommunity->val | |
750 | + (i * 8)); | |
d62a17ae | 751 | break; |
752 | } | |
753 | } | |
754 | } | |
755 | ||
756 | /* Update the existing MM ecommunity */ | |
421bb26a MK |
757 | if (ecom_val_ptr) { |
758 | memcpy(ecom_val_ptr, eval.val, sizeof(char) * ECOMMUNITY_SIZE); | |
d62a17ae | 759 | } |
760 | /* Add MM to existing */ | |
761 | else { | |
762 | memset(&ecom_tmp, 0, sizeof(ecom_tmp)); | |
763 | ecom_tmp.size = 1; | |
764 | ecom_tmp.val = (u_int8_t *)eval.val; | |
765 | ||
766 | attr->ecommunity = | |
767 | ecommunity_merge(attr->ecommunity, &ecom_tmp); | |
768 | } | |
128ea8ab | 769 | } |
770 | ||
771 | /* Install EVPN route into zebra. */ | |
d62a17ae | 772 | static int evpn_zebra_install(struct bgp *bgp, struct bgpevpn *vpn, |
773 | struct prefix_evpn *p, | |
ead40654 | 774 | struct in_addr remote_vtep_ip, u_char flags) |
128ea8ab | 775 | { |
d62a17ae | 776 | int ret; |
128ea8ab | 777 | |
d62a17ae | 778 | if (p->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) |
779 | ret = bgp_zebra_send_remote_macip(bgp, vpn, p, remote_vtep_ip, | |
ead40654 | 780 | 1, flags); |
d62a17ae | 781 | else |
782 | ret = bgp_zebra_send_remote_vtep(bgp, vpn, p, 1); | |
128ea8ab | 783 | |
d62a17ae | 784 | return ret; |
128ea8ab | 785 | } |
786 | ||
787 | /* Uninstall EVPN route from zebra. */ | |
d62a17ae | 788 | static int evpn_zebra_uninstall(struct bgp *bgp, struct bgpevpn *vpn, |
789 | struct prefix_evpn *p, | |
790 | struct in_addr remote_vtep_ip) | |
128ea8ab | 791 | { |
d62a17ae | 792 | int ret; |
128ea8ab | 793 | |
d62a17ae | 794 | if (p->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) |
795 | ret = bgp_zebra_send_remote_macip(bgp, vpn, p, remote_vtep_ip, | |
796 | 0, 0); | |
797 | else | |
798 | ret = bgp_zebra_send_remote_vtep(bgp, vpn, p, 0); | |
128ea8ab | 799 | |
d62a17ae | 800 | return ret; |
128ea8ab | 801 | } |
802 | ||
803 | /* | |
804 | * Due to MAC mobility, the prior "local" best route has been supplanted | |
805 | * by a "remote" best route. The prior route has to be deleted and withdrawn | |
806 | * from peers. | |
807 | */ | |
d62a17ae | 808 | static void evpn_delete_old_local_route(struct bgp *bgp, struct bgpevpn *vpn, |
809 | struct bgp_node *rn, | |
810 | struct bgp_info *old_local) | |
128ea8ab | 811 | { |
d62a17ae | 812 | struct bgp_node *global_rn; |
813 | struct bgp_info *ri; | |
814 | afi_t afi = AFI_L2VPN; | |
815 | safi_t safi = SAFI_EVPN; | |
128ea8ab | 816 | |
d62a17ae | 817 | /* Locate route node in the global EVPN routing table. Note that |
818 | * this table is a 2-level tree (RD-level + Prefix-level) similar to | |
819 | * L3VPN routes. | |
820 | */ | |
821 | global_rn = bgp_afi_node_lookup(bgp->rib[afi][safi], afi, safi, | |
822 | (struct prefix *)&rn->p, &vpn->prd); | |
823 | if (global_rn) { | |
824 | /* Delete route entry in the global EVPN table. */ | |
825 | delete_evpn_route_entry(bgp, vpn, afi, safi, global_rn, &ri); | |
128ea8ab | 826 | |
d62a17ae | 827 | /* Schedule for processing - withdraws to peers happen from |
828 | * this table. | |
829 | */ | |
830 | if (ri) | |
831 | bgp_process(bgp, global_rn, afi, safi); | |
832 | bgp_unlock_node(global_rn); | |
833 | } | |
128ea8ab | 834 | |
d62a17ae | 835 | /* Delete route entry in the VNI route table, caller to remove. */ |
836 | bgp_info_delete(rn, old_local); | |
128ea8ab | 837 | } |
838 | ||
839 | /* | |
840 | * Calculate the best path for an EVPN route. Install/update best path in zebra, | |
841 | * if appropriate. | |
842 | */ | |
d62a17ae | 843 | static int evpn_route_select_install(struct bgp *bgp, struct bgpevpn *vpn, |
844 | struct bgp_node *rn) | |
845 | { | |
846 | struct bgp_info *old_select, *new_select; | |
847 | struct bgp_info_pair old_and_new; | |
848 | afi_t afi = AFI_L2VPN; | |
849 | safi_t safi = SAFI_EVPN; | |
850 | int ret = 0; | |
ead40654 | 851 | u_char flags = 0; |
d62a17ae | 852 | |
853 | /* Compute the best path. */ | |
854 | bgp_best_selection(bgp, rn, &bgp->maxpaths[afi][safi], &old_and_new, | |
855 | afi, safi); | |
856 | old_select = old_and_new.old; | |
857 | new_select = old_and_new.new; | |
858 | ||
859 | /* If the best path hasn't changed - see if there is still something to | |
860 | * update | |
861 | * to zebra RIB. | |
862 | */ | |
863 | if (old_select && old_select == new_select | |
864 | && old_select->type == ZEBRA_ROUTE_BGP | |
865 | && old_select->sub_type == BGP_ROUTE_NORMAL | |
866 | && !CHECK_FLAG(rn->flags, BGP_NODE_USER_CLEAR) | |
867 | && !CHECK_FLAG(old_select->flags, BGP_INFO_ATTR_CHANGED) | |
868 | && !bgp->addpath_tx_used[afi][safi]) { | |
ead40654 MK |
869 | if (bgp_zebra_has_route_changed(rn, old_select)) { |
870 | if (old_select->attr->sticky) | |
871 | SET_FLAG(flags, ZEBRA_MACIP_TYPE_STICKY); | |
872 | if (old_select->attr->default_gw) | |
873 | SET_FLAG(flags, ZEBRA_MACIP_TYPE_GW); | |
d62a17ae | 874 | ret = evpn_zebra_install(bgp, vpn, |
875 | (struct prefix_evpn *)&rn->p, | |
876 | old_select->attr->nexthop, | |
ead40654 MK |
877 | flags); |
878 | } | |
d62a17ae | 879 | UNSET_FLAG(old_select->flags, BGP_INFO_MULTIPATH_CHG); |
880 | bgp_zebra_clear_route_change_flags(rn); | |
881 | return ret; | |
882 | } | |
883 | ||
884 | /* If the user did a "clear" this flag will be set */ | |
885 | UNSET_FLAG(rn->flags, BGP_NODE_USER_CLEAR); | |
886 | ||
887 | /* bestpath has changed; update relevant fields and install or uninstall | |
888 | * into the zebra RIB. | |
889 | */ | |
890 | if (old_select || new_select) | |
891 | bgp_bump_version(rn); | |
892 | ||
893 | if (old_select) | |
894 | bgp_info_unset_flag(rn, old_select, BGP_INFO_SELECTED); | |
895 | if (new_select) { | |
896 | bgp_info_set_flag(rn, new_select, BGP_INFO_SELECTED); | |
897 | bgp_info_unset_flag(rn, new_select, BGP_INFO_ATTR_CHANGED); | |
898 | UNSET_FLAG(new_select->flags, BGP_INFO_MULTIPATH_CHG); | |
899 | } | |
900 | ||
901 | if (new_select && new_select->type == ZEBRA_ROUTE_BGP | |
902 | && new_select->sub_type == BGP_ROUTE_NORMAL) { | |
ead40654 MK |
903 | flags = 0; |
904 | if (new_select->attr->sticky) | |
905 | SET_FLAG(flags, ZEBRA_MACIP_TYPE_STICKY); | |
906 | if (new_select->attr->default_gw) | |
907 | SET_FLAG(flags, ZEBRA_MACIP_TYPE_GW); | |
d62a17ae | 908 | ret = evpn_zebra_install(bgp, vpn, (struct prefix_evpn *)&rn->p, |
909 | new_select->attr->nexthop, | |
ead40654 | 910 | flags); |
d62a17ae | 911 | /* If an old best existed and it was a "local" route, the only |
912 | * reason | |
913 | * it would be supplanted is due to MAC mobility procedures. So, | |
914 | * we | |
915 | * need to do an implicit delete and withdraw that route from | |
916 | * peers. | |
917 | */ | |
918 | if (old_select && old_select->peer == bgp->peer_self | |
919 | && old_select->type == ZEBRA_ROUTE_BGP | |
920 | && old_select->sub_type == BGP_ROUTE_STATIC) | |
921 | evpn_delete_old_local_route(bgp, vpn, rn, old_select); | |
922 | } else { | |
923 | if (old_select && old_select->type == ZEBRA_ROUTE_BGP | |
924 | && old_select->sub_type == BGP_ROUTE_NORMAL) | |
925 | ret = evpn_zebra_uninstall(bgp, vpn, | |
926 | (struct prefix_evpn *)&rn->p, | |
927 | old_select->attr->nexthop); | |
928 | } | |
929 | ||
930 | /* Clear any route change flags. */ | |
931 | bgp_zebra_clear_route_change_flags(rn); | |
932 | ||
933 | /* Reap old select bgp_info, if it has been removed */ | |
934 | if (old_select && CHECK_FLAG(old_select->flags, BGP_INFO_REMOVED)) | |
935 | bgp_info_reap(rn, old_select); | |
936 | ||
937 | return ret; | |
128ea8ab | 938 | } |
939 | ||
ead40654 MK |
940 | /* |
941 | * Return true if the local ri for this rn is of type gateway mac | |
942 | */ | |
943 | static int evpn_route_is_def_gw(struct bgp *bgp, struct bgp_node *rn) | |
944 | { | |
945 | struct bgp_info *tmp_ri = NULL; | |
946 | struct bgp_info *local_ri = NULL; | |
947 | ||
948 | local_ri = NULL; | |
949 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) { | |
950 | if (tmp_ri->peer == bgp->peer_self | |
951 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
952 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
953 | local_ri = tmp_ri; | |
954 | } | |
955 | ||
956 | if (!local_ri) | |
957 | return 0; | |
958 | ||
959 | return local_ri->attr->default_gw; | |
960 | } | |
961 | ||
c85c03c7 | 962 | |
963 | /* | |
964 | * Return true if the local ri for this rn has sticky set | |
965 | */ | |
d62a17ae | 966 | static int evpn_route_is_sticky(struct bgp *bgp, struct bgp_node *rn) |
c85c03c7 | 967 | { |
d62a17ae | 968 | struct bgp_info *tmp_ri; |
969 | struct bgp_info *local_ri; | |
c85c03c7 | 970 | |
d62a17ae | 971 | local_ri = NULL; |
972 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) { | |
973 | if (tmp_ri->peer == bgp->peer_self | |
974 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
975 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
976 | local_ri = tmp_ri; | |
977 | } | |
c85c03c7 | 978 | |
d62a17ae | 979 | if (!local_ri) |
980 | return 0; | |
c85c03c7 | 981 | |
d62a17ae | 982 | return local_ri->attr->sticky; |
c85c03c7 | 983 | } |
984 | ||
342dd0c6 | 985 | static int update_evpn_type5_route_entry(struct bgp *bgp_def, |
986 | struct bgp *bgp_vrf, afi_t afi, | |
987 | safi_t safi, struct bgp_node *rn, | |
5424b7ba | 988 | struct attr *attr, int *route_changed) |
342dd0c6 | 989 | { |
990 | struct attr *attr_new = NULL; | |
991 | struct bgp_info *ri = NULL; | |
992 | mpls_label_t label = MPLS_INVALID_LABEL; | |
993 | struct bgp_info *local_ri = NULL; | |
994 | struct bgp_info *tmp_ri = NULL; | |
995 | ||
5424b7ba | 996 | *route_changed = 0; |
342dd0c6 | 997 | /* locate the local route entry if any */ |
998 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) { | |
999 | if (tmp_ri->peer == bgp_def->peer_self | |
1000 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
1001 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
1002 | local_ri = tmp_ri; | |
1003 | } | |
1004 | ||
1005 | /* create a new route entry if one doesnt exist. | |
523cafc4 | 1006 | Otherwise see if route attr has changed |
1007 | */ | |
342dd0c6 | 1008 | if (!local_ri) { |
1009 | ||
5424b7ba MK |
1010 | /* route has changed as this is the first entry */ |
1011 | *route_changed = 1; | |
1012 | ||
342dd0c6 | 1013 | /* Add (or update) attribute to hash. */ |
1014 | attr_new = bgp_attr_intern(attr); | |
1015 | ||
1016 | /* create the route info from attribute */ | |
1017 | ri = info_make(ZEBRA_ROUTE_BGP, BGP_ROUTE_STATIC, 0, | |
1018 | bgp_def->peer_self, attr_new, rn); | |
1019 | SET_FLAG(ri->flags, BGP_INFO_VALID); | |
1020 | ||
b57ba6d2 | 1021 | /* Type-5 routes advertise the L3-VNI */ |
342dd0c6 | 1022 | bgp_info_extra_get(ri); |
1023 | vni2label(bgp_vrf->l3vni, &label); | |
b57ba6d2 MK |
1024 | memcpy(&ri->extra->label, &label, sizeof(label)); |
1025 | ri->extra->num_labels = 1; | |
342dd0c6 | 1026 | |
1027 | /* add the route entry to route node*/ | |
1028 | bgp_info_add(rn, ri); | |
1029 | } else { | |
1030 | ||
1031 | tmp_ri = local_ri; | |
1032 | if (!attrhash_cmp(tmp_ri->attr, attr)) { | |
5424b7ba MK |
1033 | |
1034 | /* attribute changed */ | |
1035 | *route_changed = 1; | |
1036 | ||
342dd0c6 | 1037 | /* The attribute has changed. */ |
1038 | /* Add (or update) attribute to hash. */ | |
1039 | attr_new = bgp_attr_intern(attr); | |
1040 | bgp_info_set_flag(rn, tmp_ri, BGP_INFO_ATTR_CHANGED); | |
1041 | ||
1042 | /* Restore route, if needed. */ | |
1043 | if (CHECK_FLAG(tmp_ri->flags, BGP_INFO_REMOVED)) | |
1044 | bgp_info_restore(rn, tmp_ri); | |
1045 | ||
1046 | /* Unintern existing, set to new. */ | |
1047 | bgp_attr_unintern(&tmp_ri->attr); | |
1048 | tmp_ri->attr = attr_new; | |
1049 | tmp_ri->uptime = bgp_clock(); | |
1050 | } | |
1051 | } | |
1052 | return 0; | |
1053 | } | |
1054 | ||
1055 | /* update evpn type-5 route entry */ | |
1056 | static int update_evpn_type5_route(struct bgp *bgp_vrf, | |
2f69f6d3 | 1057 | struct prefix_evpn *evp, |
1058 | struct attr* src_attr) | |
342dd0c6 | 1059 | { |
1060 | afi_t afi = AFI_L2VPN; | |
1061 | safi_t safi = SAFI_EVPN; | |
1062 | struct attr attr; | |
1063 | struct bgp_node *rn = NULL; | |
1064 | struct bgp *bgp_def = NULL; | |
5424b7ba | 1065 | int route_changed = 0; |
342dd0c6 | 1066 | |
1067 | bgp_def = bgp_get_default(); | |
1068 | if (!bgp_def) | |
faafdfa8 | 1069 | return 0; |
342dd0c6 | 1070 | |
2f69f6d3 | 1071 | /* Build path attribute for this route - use the source attr, if |
1072 | * present, else treat as locally originated. | |
1073 | */ | |
1074 | if (src_attr) | |
1075 | bgp_attr_dup(&attr, src_attr); | |
1076 | else { | |
1077 | memset(&attr, 0, sizeof(struct attr)); | |
1078 | bgp_attr_default_set(&attr, BGP_ORIGIN_IGP); | |
1079 | } | |
1080 | /* Set nexthop to ourselves and fill in the Router MAC. */ | |
342dd0c6 | 1081 | attr.nexthop = bgp_vrf->originator_ip; |
1082 | attr.mp_nexthop_global_in = bgp_vrf->originator_ip; | |
1083 | attr.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
1084 | memcpy(&attr.rmac, &bgp_vrf->rmac, sizeof(struct ethaddr)); | |
1085 | ||
1086 | /* Setup RT and encap extended community */ | |
1087 | build_evpn_type5_route_extcomm(bgp_vrf, &attr); | |
1088 | ||
1089 | /* get the route node in global table */ | |
1090 | rn = bgp_afi_node_get(bgp_def->rib[afi][safi], afi, safi, | |
1091 | (struct prefix *)evp, | |
1092 | &bgp_vrf->vrf_prd); | |
1093 | assert(rn); | |
1094 | ||
1095 | /* create or update the route entry within the route node */ | |
1096 | update_evpn_type5_route_entry(bgp_def, bgp_vrf, | |
1097 | afi, safi, | |
5424b7ba | 1098 | rn, &attr, &route_changed); |
342dd0c6 | 1099 | |
1100 | /* schedule for processing and unlock node */ | |
5424b7ba MK |
1101 | if (route_changed) { |
1102 | bgp_process(bgp_def, rn, afi, safi); | |
1103 | bgp_unlock_node(rn); | |
1104 | } | |
342dd0c6 | 1105 | |
1106 | /* uninten temporary */ | |
5ee65f6f | 1107 | if (!src_attr) |
1108 | aspath_unintern(&attr.aspath); | |
342dd0c6 | 1109 | return 0; |
1110 | } | |
1111 | ||
128ea8ab | 1112 | /* |
1113 | * Create or update EVPN route entry. This could be in the VNI route table | |
1114 | * or the global route table. | |
1115 | */ | |
d62a17ae | 1116 | static int update_evpn_route_entry(struct bgp *bgp, struct bgpevpn *vpn, |
1117 | afi_t afi, safi_t safi, struct bgp_node *rn, | |
1118 | struct attr *attr, int add, int vni_table, | |
1a98c087 | 1119 | struct bgp_info **ri, u_char flags) |
d62a17ae | 1120 | { |
1121 | struct bgp_info *tmp_ri; | |
1122 | struct bgp_info *local_ri, *remote_ri; | |
1123 | struct attr *attr_new; | |
b57ba6d2 MK |
1124 | mpls_label_t label[BGP_MAX_LABELS]; |
1125 | u_int32_t num_labels = 1; | |
d62a17ae | 1126 | int route_change = 1; |
1127 | u_char sticky = 0; | |
b57ba6d2 | 1128 | struct prefix_evpn *evp; |
d62a17ae | 1129 | |
1130 | *ri = NULL; | |
b57ba6d2 MK |
1131 | evp = (struct prefix_evpn *)&rn->p; |
1132 | memset(&label, 0, sizeof(label)); | |
d62a17ae | 1133 | |
1134 | /* See if this is an update of an existing route, or a new add. Also, | |
1135 | * identify if already known from remote, and if so, the one with the | |
1136 | * highest sequence number; this is only when adding to the VNI routing | |
1137 | * table. | |
1138 | */ | |
1139 | local_ri = remote_ri = NULL; | |
1140 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) { | |
1141 | if (tmp_ri->peer == bgp->peer_self | |
1142 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
1143 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
1144 | local_ri = tmp_ri; | |
1145 | if (vni_table) { | |
1146 | if (tmp_ri->type == ZEBRA_ROUTE_BGP | |
1147 | && tmp_ri->sub_type == BGP_ROUTE_NORMAL | |
1148 | && CHECK_FLAG(tmp_ri->flags, BGP_INFO_VALID)) { | |
1149 | if (!remote_ri) | |
1150 | remote_ri = tmp_ri; | |
1151 | else if (mac_mobility_seqnum(tmp_ri->attr) | |
1152 | > mac_mobility_seqnum(remote_ri->attr)) | |
1153 | remote_ri = tmp_ri; | |
1154 | } | |
1155 | } | |
1156 | } | |
1157 | ||
1158 | /* If route doesn't exist already, create a new one, if told to. | |
1159 | * Otherwise act based on whether the attributes of the route have | |
1160 | * changed or not. | |
1161 | */ | |
1162 | if (!local_ri && !add) | |
1163 | return 0; | |
1164 | ||
1165 | if (!local_ri) { | |
1166 | /* When learnt locally for the first time but already known from | |
1167 | * remote, we have to initiate appropriate MAC mobility steps. | |
1168 | * This | |
1169 | * is applicable when updating the VNI routing table. | |
1a98c087 MK |
1170 | * We need to skip mobility steps for g/w macs (local mac on g/w |
1171 | * SVI) advertised in EVPN. | |
1172 | * This will ensure that local routes are preferred for g/w macs | |
d62a17ae | 1173 | */ |
ead40654 | 1174 | if (remote_ri && !CHECK_FLAG(flags, ZEBRA_MACIP_TYPE_GW)) { |
d62a17ae | 1175 | u_int32_t cur_seqnum; |
1176 | ||
1177 | /* Add MM extended community to route. */ | |
1178 | cur_seqnum = mac_mobility_seqnum(remote_ri->attr); | |
1179 | add_mac_mobility_to_attr(cur_seqnum + 1, attr); | |
1180 | } | |
1181 | ||
1182 | /* Add (or update) attribute to hash. */ | |
1183 | attr_new = bgp_attr_intern(attr); | |
1184 | ||
1185 | /* Extract MAC mobility sequence number, if any. */ | |
1186 | attr_new->mm_seqnum = | |
1187 | bgp_attr_mac_mobility_seqnum(attr_new, &sticky); | |
1188 | attr_new->sticky = sticky; | |
1189 | ||
1190 | /* Create new route with its attribute. */ | |
1191 | tmp_ri = info_make(ZEBRA_ROUTE_BGP, BGP_ROUTE_STATIC, 0, | |
1192 | bgp->peer_self, attr_new, rn); | |
1193 | SET_FLAG(tmp_ri->flags, BGP_INFO_VALID); | |
1194 | bgp_info_extra_get(tmp_ri); | |
1195 | ||
1196 | /* The VNI goes into the 'label' field of the route */ | |
b57ba6d2 | 1197 | vni2label(vpn->vni, &label[0]); |
c48d9f5f MK |
1198 | |
1199 | /* Type-2 routes may carry a second VNI - the L3-VNI. | |
1200 | * Only attach second label if we are advertising two labels for | |
1201 | * type-2 routes. | |
1202 | */ | |
1203 | if (evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE && | |
1204 | CHECK_FLAG(vpn->flags, VNI_FLAG_USE_TWO_LABELS)) { | |
b57ba6d2 MK |
1205 | vni_t l3vni; |
1206 | ||
1207 | l3vni = bgpevpn_get_l3vni(vpn); | |
1208 | if (l3vni) { | |
1209 | vni2label(l3vni, &label[1]); | |
1210 | num_labels++; | |
1211 | } | |
1212 | } | |
d62a17ae | 1213 | |
b57ba6d2 MK |
1214 | memcpy(&tmp_ri->extra->label, label, sizeof(label)); |
1215 | tmp_ri->extra->num_labels = num_labels; | |
d62a17ae | 1216 | bgp_info_add(rn, tmp_ri); |
1217 | } else { | |
1218 | tmp_ri = local_ri; | |
1219 | if (attrhash_cmp(tmp_ri->attr, attr) | |
1220 | && !CHECK_FLAG(tmp_ri->flags, BGP_INFO_REMOVED)) | |
1221 | route_change = 0; | |
1222 | else { | |
c48d9f5f MK |
1223 | /* |
1224 | * The attributes have changed, type-2 routes needs to | |
1225 | * be advertised with right labels. | |
1226 | */ | |
1227 | vni2label(vpn->vni, &label[0]); | |
1228 | if (evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE && | |
1229 | CHECK_FLAG(vpn->flags, VNI_FLAG_USE_TWO_LABELS)) { | |
1230 | vni_t l3vni; | |
1231 | ||
1232 | l3vni = bgpevpn_get_l3vni(vpn); | |
1233 | if (l3vni) { | |
1234 | vni2label(l3vni, &label[1]); | |
1235 | num_labels++; | |
1236 | } | |
1237 | } | |
1238 | memcpy(&tmp_ri->extra->label, label, sizeof(label)); | |
1239 | tmp_ri->extra->num_labels = num_labels; | |
1240 | ||
d62a17ae | 1241 | /* The attribute has changed. */ |
1242 | /* Add (or update) attribute to hash. */ | |
1243 | attr_new = bgp_attr_intern(attr); | |
1244 | bgp_info_set_flag(rn, tmp_ri, BGP_INFO_ATTR_CHANGED); | |
1245 | ||
1246 | /* Restore route, if needed. */ | |
1247 | if (CHECK_FLAG(tmp_ri->flags, BGP_INFO_REMOVED)) | |
1248 | bgp_info_restore(rn, tmp_ri); | |
1249 | ||
1250 | /* Unintern existing, set to new. */ | |
1251 | bgp_attr_unintern(&tmp_ri->attr); | |
1252 | tmp_ri->attr = attr_new; | |
1253 | tmp_ri->uptime = bgp_clock(); | |
1254 | } | |
1255 | } | |
1256 | ||
1257 | /* Return back the route entry. */ | |
1258 | *ri = tmp_ri; | |
1259 | return route_change; | |
128ea8ab | 1260 | } |
1261 | ||
1262 | /* | |
1263 | * Create or update EVPN route (of type based on prefix) for specified VNI | |
1264 | * and schedule for processing. | |
1265 | */ | |
d62a17ae | 1266 | static int update_evpn_route(struct bgp *bgp, struct bgpevpn *vpn, |
1a98c087 | 1267 | struct prefix_evpn *p, u_char flags) |
128ea8ab | 1268 | { |
d62a17ae | 1269 | struct bgp_node *rn; |
1270 | struct attr attr; | |
1271 | struct attr *attr_new; | |
1272 | struct bgp_info *ri; | |
1273 | afi_t afi = AFI_L2VPN; | |
1274 | safi_t safi = SAFI_EVPN; | |
1275 | int route_change; | |
128ea8ab | 1276 | |
d62a17ae | 1277 | memset(&attr, 0, sizeof(struct attr)); |
128ea8ab | 1278 | |
d62a17ae | 1279 | /* Build path-attribute for this route. */ |
1280 | bgp_attr_default_set(&attr, BGP_ORIGIN_IGP); | |
1281 | attr.nexthop = vpn->originator_ip; | |
1282 | attr.mp_nexthop_global_in = vpn->originator_ip; | |
1283 | attr.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
317f1fe0 | 1284 | attr.sticky = CHECK_FLAG(flags, ZEBRA_MACIP_TYPE_STICKY) ? 1 : 0; |
ead40654 | 1285 | attr.default_gw = CHECK_FLAG(flags, ZEBRA_MACIP_TYPE_GW) ? 1 : 0; |
be41eb68 MK |
1286 | |
1287 | /* PMSI is only needed for type-3 routes */ | |
1288 | if (p->prefix.route_type == BGP_EVPN_IMET_ROUTE) | |
1289 | attr.flag |= ATTR_FLAG_BIT(BGP_ATTR_PMSI_TUNNEL); | |
1290 | ||
1291 | /* router mac is only needed for type-2 and type-5 routes */ | |
1292 | if (p->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) | |
1293 | bgpevpn_get_rmac(vpn, &attr.rmac); | |
a21bd7a3 | 1294 | vni2label(vpn->vni, &(attr.label)); |
128ea8ab | 1295 | |
d62a17ae | 1296 | /* Set up RT and ENCAP extended community. */ |
7ec156a9 MK |
1297 | build_evpn_route_extcomm(vpn, &attr, |
1298 | IS_EVPN_PREFIX_IPADDR_V4(p) ? | |
1299 | AFI_IP : AFI_IP6); | |
128ea8ab | 1300 | |
d62a17ae | 1301 | /* First, create (or fetch) route node within the VNI. */ |
1302 | /* NOTE: There is no RD here. */ | |
1303 | rn = bgp_node_get(vpn->route_table, (struct prefix *)p); | |
128ea8ab | 1304 | |
d62a17ae | 1305 | /* Create or update route entry. */ |
1306 | route_change = update_evpn_route_entry(bgp, vpn, afi, safi, rn, &attr, | |
1a98c087 | 1307 | 1, 1, &ri, flags); |
d62a17ae | 1308 | assert(ri); |
1309 | attr_new = ri->attr; | |
128ea8ab | 1310 | |
d62a17ae | 1311 | /* Perform route selection; this is just to set the flags correctly |
1312 | * as local route in the VNI always wins. | |
1313 | */ | |
1314 | evpn_route_select_install(bgp, vpn, rn); | |
1315 | bgp_unlock_node(rn); | |
128ea8ab | 1316 | |
d62a17ae | 1317 | /* If this is a new route or some attribute has changed, export the |
1318 | * route to the global table. The route will be advertised to peers | |
1319 | * from there. Note that this table is a 2-level tree (RD-level + | |
1320 | * Prefix-level) similar to L3VPN routes. | |
1321 | */ | |
1322 | if (route_change) { | |
1323 | struct bgp_info *global_ri; | |
128ea8ab | 1324 | |
d62a17ae | 1325 | rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, |
1326 | (struct prefix *)p, &vpn->prd); | |
1327 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, attr_new, 1, 0, | |
1a98c087 | 1328 | &global_ri, flags); |
128ea8ab | 1329 | |
d62a17ae | 1330 | /* Schedule for processing and unlock node. */ |
1331 | bgp_process(bgp, rn, afi, safi); | |
1332 | bgp_unlock_node(rn); | |
1333 | } | |
128ea8ab | 1334 | |
d62a17ae | 1335 | /* Unintern temporary. */ |
1336 | aspath_unintern(&attr.aspath); | |
128ea8ab | 1337 | |
d62a17ae | 1338 | return 0; |
128ea8ab | 1339 | } |
1340 | ||
342dd0c6 | 1341 | /* Delete EVPN type5 route entry from global table */ |
1342 | static void delete_evpn_type5_route_entry(struct bgp *bgp_def, | |
1343 | struct bgp *bgp_vrf, | |
1344 | afi_t afi, safi_t safi, | |
1345 | struct bgp_node *rn, | |
1346 | struct bgp_info **ri) | |
1347 | { | |
1348 | struct bgp_info *tmp_ri = NULL; | |
1349 | ||
1350 | *ri = NULL; | |
1351 | ||
1352 | /* find the matching route entry */ | |
1353 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) | |
1354 | if (tmp_ri->peer == bgp_def->peer_self | |
1355 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
1356 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
1357 | break; | |
1358 | ||
1359 | *ri = tmp_ri; | |
1360 | ||
1361 | /* Mark route for delete. */ | |
1362 | if (tmp_ri) | |
1363 | bgp_info_delete(rn, tmp_ri); | |
1364 | } | |
1365 | ||
1366 | /* Delete EVPN type5 route */ | |
1367 | static int delete_evpn_type5_route(struct bgp *bgp_vrf, | |
1368 | struct prefix_evpn *evp) | |
1369 | { | |
1370 | afi_t afi = AFI_L2VPN; | |
1371 | safi_t safi = SAFI_EVPN; | |
1372 | struct bgp_node *rn = NULL; | |
1373 | struct bgp_info *ri = NULL; | |
1374 | struct bgp *bgp_def = NULL; /* default bgp instance */ | |
1375 | ||
1376 | bgp_def = bgp_get_default(); | |
1377 | if (!bgp_def) | |
faafdfa8 | 1378 | return 0; |
342dd0c6 | 1379 | |
1380 | /* locate the global route entry for this type-5 prefix */ | |
1381 | rn = bgp_afi_node_lookup(bgp_def->rib[afi][safi], afi, safi, | |
1382 | (struct prefix *)evp, &bgp_vrf->vrf_prd); | |
1383 | if (!rn) | |
1384 | return 0; | |
1385 | ||
1386 | delete_evpn_type5_route_entry(bgp_def, bgp_vrf, afi, safi, rn, &ri); | |
1387 | if (ri) | |
1388 | bgp_process(bgp_def, rn, afi, safi); | |
1389 | bgp_unlock_node(rn); | |
1390 | return 0; | |
1391 | } | |
1392 | ||
128ea8ab | 1393 | /* |
1394 | * Delete EVPN route entry. This could be in the VNI route table | |
1395 | * or the global route table. | |
1396 | */ | |
d62a17ae | 1397 | static void delete_evpn_route_entry(struct bgp *bgp, struct bgpevpn *vpn, |
1398 | afi_t afi, safi_t safi, struct bgp_node *rn, | |
1399 | struct bgp_info **ri) | |
128ea8ab | 1400 | { |
d62a17ae | 1401 | struct bgp_info *tmp_ri; |
128ea8ab | 1402 | |
d62a17ae | 1403 | *ri = NULL; |
128ea8ab | 1404 | |
d62a17ae | 1405 | /* Now, find matching route. */ |
1406 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) | |
1407 | if (tmp_ri->peer == bgp->peer_self | |
1408 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
1409 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
1410 | break; | |
128ea8ab | 1411 | |
d62a17ae | 1412 | *ri = tmp_ri; |
128ea8ab | 1413 | |
d62a17ae | 1414 | /* Mark route for delete. */ |
1415 | if (tmp_ri) | |
1416 | bgp_info_delete(rn, tmp_ri); | |
128ea8ab | 1417 | } |
1418 | ||
1419 | /* | |
1420 | * Delete EVPN route (of type based on prefix) for specified VNI and | |
1421 | * schedule for processing. | |
1422 | */ | |
d62a17ae | 1423 | static int delete_evpn_route(struct bgp *bgp, struct bgpevpn *vpn, |
1424 | struct prefix_evpn *p) | |
1425 | { | |
1426 | struct bgp_node *rn, *global_rn; | |
1427 | struct bgp_info *ri; | |
1428 | afi_t afi = AFI_L2VPN; | |
1429 | safi_t safi = SAFI_EVPN; | |
1430 | ||
1431 | /* First, locate the route node within the VNI. If it doesn't exist, | |
1432 | * there | |
1433 | * is nothing further to do. | |
1434 | */ | |
1435 | /* NOTE: There is no RD here. */ | |
1436 | rn = bgp_node_lookup(vpn->route_table, (struct prefix *)p); | |
1437 | if (!rn) | |
1438 | return 0; | |
1439 | ||
1440 | /* Next, locate route node in the global EVPN routing table. Note that | |
1441 | * this table is a 2-level tree (RD-level + Prefix-level) similar to | |
1442 | * L3VPN routes. | |
1443 | */ | |
1444 | global_rn = bgp_afi_node_lookup(bgp->rib[afi][safi], afi, safi, | |
1445 | (struct prefix *)p, &vpn->prd); | |
1446 | if (global_rn) { | |
1447 | /* Delete route entry in the global EVPN table. */ | |
1448 | delete_evpn_route_entry(bgp, vpn, afi, safi, global_rn, &ri); | |
1449 | ||
1450 | /* Schedule for processing - withdraws to peers happen from | |
1451 | * this table. | |
1452 | */ | |
1453 | if (ri) | |
1454 | bgp_process(bgp, global_rn, afi, safi); | |
1455 | bgp_unlock_node(global_rn); | |
1456 | } | |
1457 | ||
1458 | /* Delete route entry in the VNI route table. This can just be removed. | |
1459 | */ | |
1460 | delete_evpn_route_entry(bgp, vpn, afi, safi, rn, &ri); | |
1461 | if (ri) | |
1462 | bgp_info_reap(rn, ri); | |
1463 | bgp_unlock_node(rn); | |
1464 | ||
1465 | return 0; | |
128ea8ab | 1466 | } |
1467 | ||
1468 | /* | |
1469 | * Update all type-2 (MACIP) local routes for this VNI - these should also | |
1470 | * be scheduled for advertise to peers. | |
1471 | */ | |
d62a17ae | 1472 | static int update_all_type2_routes(struct bgp *bgp, struct bgpevpn *vpn) |
1473 | { | |
1474 | afi_t afi; | |
1475 | safi_t safi; | |
1476 | struct bgp_node *rn; | |
1477 | struct bgp_info *ri; | |
1478 | struct attr attr; | |
1479 | struct attr attr_sticky; | |
ead40654 | 1480 | struct attr attr_def_gw; |
7ec156a9 MK |
1481 | struct attr attr_ip6; |
1482 | struct attr attr_sticky_ip6; | |
ead40654 | 1483 | struct attr attr_def_gw_ip6; |
d62a17ae | 1484 | struct attr *attr_new; |
1485 | ||
1486 | afi = AFI_L2VPN; | |
1487 | safi = SAFI_EVPN; | |
1488 | memset(&attr, 0, sizeof(struct attr)); | |
1489 | memset(&attr_sticky, 0, sizeof(struct attr)); | |
ead40654 | 1490 | memset(&attr_def_gw, 0, sizeof(struct attr)); |
7ec156a9 MK |
1491 | memset(&attr_ip6, 0, sizeof(struct attr)); |
1492 | memset(&attr_sticky_ip6, 0, sizeof(struct attr)); | |
ead40654 | 1493 | memset(&attr_def_gw_ip6, 0, sizeof(struct attr)); |
d62a17ae | 1494 | |
1495 | /* Build path-attribute - all type-2 routes for this VNI will share the | |
1496 | * same path attribute. | |
1497 | */ | |
1498 | bgp_attr_default_set(&attr, BGP_ORIGIN_IGP); | |
1499 | bgp_attr_default_set(&attr_sticky, BGP_ORIGIN_IGP); | |
ead40654 | 1500 | bgp_attr_default_set(&attr_def_gw, BGP_ORIGIN_IGP); |
d62a17ae | 1501 | attr.nexthop = vpn->originator_ip; |
1502 | attr.mp_nexthop_global_in = vpn->originator_ip; | |
1503 | attr.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
bc59a672 | 1504 | bgpevpn_get_rmac(vpn, &attr.rmac); |
d62a17ae | 1505 | attr_sticky.nexthop = vpn->originator_ip; |
1506 | attr_sticky.mp_nexthop_global_in = vpn->originator_ip; | |
1507 | attr_sticky.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
1508 | attr_sticky.sticky = 1; | |
bc59a672 | 1509 | bgpevpn_get_rmac(vpn, &attr_sticky.rmac); |
ead40654 MK |
1510 | attr_def_gw.nexthop = vpn->originator_ip; |
1511 | attr_def_gw.mp_nexthop_global_in = vpn->originator_ip; | |
1512 | attr_def_gw.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
1513 | attr_def_gw.default_gw = 1; | |
1514 | bgpevpn_get_rmac(vpn, &attr_def_gw.rmac); | |
7ec156a9 MK |
1515 | bgp_attr_default_set(&attr_ip6, BGP_ORIGIN_IGP); |
1516 | bgp_attr_default_set(&attr_sticky_ip6, BGP_ORIGIN_IGP); | |
a6ad0a41 | 1517 | bgp_attr_default_set(&attr_def_gw_ip6, BGP_ORIGIN_IGP); |
7ec156a9 MK |
1518 | attr_ip6.nexthop = vpn->originator_ip; |
1519 | attr_ip6.mp_nexthop_global_in = vpn->originator_ip; | |
1520 | attr_ip6.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
1521 | bgpevpn_get_rmac(vpn, &attr_ip6.rmac); | |
1522 | attr_sticky_ip6.nexthop = vpn->originator_ip; | |
1523 | attr_sticky_ip6.mp_nexthop_global_in = vpn->originator_ip; | |
1524 | attr_sticky_ip6.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
1525 | attr_sticky_ip6.sticky = 1; | |
1526 | bgpevpn_get_rmac(vpn, &attr_sticky_ip6.rmac); | |
ead40654 MK |
1527 | attr_def_gw_ip6.nexthop = vpn->originator_ip; |
1528 | attr_def_gw_ip6.mp_nexthop_global_in = vpn->originator_ip; | |
1529 | attr_def_gw_ip6.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
1530 | attr_def_gw_ip6.default_gw = 1; | |
1531 | bgpevpn_get_rmac(vpn, &attr_def_gw_ip6.rmac); | |
d62a17ae | 1532 | |
1533 | /* Set up RT, ENCAP and sticky MAC extended community. */ | |
7ec156a9 MK |
1534 | build_evpn_route_extcomm(vpn, &attr, AFI_IP); |
1535 | build_evpn_route_extcomm(vpn, &attr_sticky, AFI_IP); | |
ead40654 | 1536 | build_evpn_route_extcomm(vpn, &attr_def_gw, AFI_IP); |
7ec156a9 MK |
1537 | build_evpn_route_extcomm(vpn, &attr_ip6, AFI_IP6); |
1538 | build_evpn_route_extcomm(vpn, &attr_sticky_ip6, AFI_IP6); | |
ead40654 | 1539 | build_evpn_route_extcomm(vpn, &attr_def_gw_ip6, AFI_IP); |
d62a17ae | 1540 | |
1541 | /* Walk this VNI's route table and update local type-2 routes. For any | |
1542 | * routes updated, update corresponding entry in the global table too. | |
1543 | */ | |
1544 | for (rn = bgp_table_top(vpn->route_table); rn; | |
1545 | rn = bgp_route_next(rn)) { | |
1546 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
1547 | struct bgp_node *rd_rn; | |
1548 | struct bgp_info *global_ri; | |
1549 | ||
1550 | if (evp->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE) | |
1551 | continue; | |
1552 | ||
7ec156a9 MK |
1553 | if (IS_EVPN_PREFIX_IPADDR_V4(evp)) { |
1554 | if (evpn_route_is_sticky(bgp, rn)) | |
1555 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, | |
1556 | &attr_sticky, 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, 0, 1, | |
1561 | &ri, 0); | |
7ec156a9 MK |
1562 | else |
1563 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, | |
1564 | &attr, 0, 1, &ri, 0); | |
1565 | } else { | |
1566 | if (evpn_route_is_sticky(bgp, rn)) | |
1567 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, | |
1568 | &attr_sticky_ip6, 0, 1, | |
1569 | &ri, 0); | |
ead40654 MK |
1570 | else if (evpn_route_is_def_gw(bgp, rn)) |
1571 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, | |
1572 | &attr_def_gw_ip6, 0, 1, | |
1573 | &ri, 0); | |
7ec156a9 MK |
1574 | else |
1575 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, | |
1576 | &attr_ip6, 0, 1, | |
1577 | &ri, 0); | |
1578 | } | |
d62a17ae | 1579 | |
1580 | /* If a local route exists for this prefix, we need to update | |
1581 | * the global routing table too. | |
1582 | */ | |
1583 | if (!ri) | |
1584 | continue; | |
1585 | ||
1586 | /* Perform route selection; this is just to set the flags | |
1587 | * correctly | |
1588 | * as local route in the VNI always wins. | |
1589 | */ | |
1590 | evpn_route_select_install(bgp, vpn, rn); | |
1591 | ||
1592 | attr_new = ri->attr; | |
1593 | ||
1594 | /* Update route in global routing table. */ | |
1595 | rd_rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, | |
1596 | (struct prefix *)evp, &vpn->prd); | |
1597 | assert(rd_rn); | |
1598 | update_evpn_route_entry(bgp, vpn, afi, safi, rd_rn, attr_new, 0, | |
1a98c087 | 1599 | 0, &global_ri, 0); |
d62a17ae | 1600 | |
1601 | /* Schedule for processing and unlock node. */ | |
1602 | bgp_process(bgp, rd_rn, afi, safi); | |
1603 | bgp_unlock_node(rd_rn); | |
1604 | } | |
1605 | ||
1606 | /* Unintern temporary. */ | |
1607 | aspath_unintern(&attr.aspath); | |
ead40654 | 1608 | aspath_unintern(&attr_ip6.aspath); |
d62a17ae | 1609 | aspath_unintern(&attr_sticky.aspath); |
ead40654 MK |
1610 | aspath_unintern(&attr_sticky_ip6.aspath); |
1611 | aspath_unintern(&attr_def_gw.aspath); | |
1612 | aspath_unintern(&attr_def_gw_ip6.aspath); | |
d62a17ae | 1613 | |
1614 | return 0; | |
128ea8ab | 1615 | } |
1616 | ||
1617 | /* | |
1618 | * Delete all type-2 (MACIP) local routes for this VNI - only from the | |
1619 | * global routing table. These are also scheduled for withdraw from peers. | |
1620 | */ | |
d62a17ae | 1621 | static int delete_global_type2_routes(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1622 | { |
d62a17ae | 1623 | afi_t afi; |
1624 | safi_t safi; | |
1625 | struct bgp_node *rdrn, *rn; | |
1626 | struct bgp_table *table; | |
1627 | struct bgp_info *ri; | |
128ea8ab | 1628 | |
d62a17ae | 1629 | afi = AFI_L2VPN; |
1630 | safi = SAFI_EVPN; | |
128ea8ab | 1631 | |
d62a17ae | 1632 | rdrn = bgp_node_lookup(bgp->rib[afi][safi], (struct prefix *)&vpn->prd); |
1633 | if (rdrn && rdrn->info) { | |
1634 | table = (struct bgp_table *)rdrn->info; | |
1635 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) { | |
1636 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
128ea8ab | 1637 | |
d62a17ae | 1638 | if (evp->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE) |
1639 | continue; | |
128ea8ab | 1640 | |
d62a17ae | 1641 | delete_evpn_route_entry(bgp, vpn, afi, safi, rn, &ri); |
1642 | if (ri) | |
1643 | bgp_process(bgp, rn, afi, safi); | |
1644 | } | |
1645 | } | |
128ea8ab | 1646 | |
d62a17ae | 1647 | /* Unlock RD node. */ |
1648 | if (rdrn) | |
1649 | bgp_unlock_node(rdrn); | |
128ea8ab | 1650 | |
d62a17ae | 1651 | return 0; |
128ea8ab | 1652 | } |
1653 | ||
1654 | /* | |
1655 | * Delete all type-2 (MACIP) local routes for this VNI - from the global | |
1656 | * table as well as the per-VNI route table. | |
1657 | */ | |
d62a17ae | 1658 | static int delete_all_type2_routes(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1659 | { |
d62a17ae | 1660 | afi_t afi; |
1661 | safi_t safi; | |
1662 | struct bgp_node *rn; | |
1663 | struct bgp_info *ri; | |
128ea8ab | 1664 | |
d62a17ae | 1665 | afi = AFI_L2VPN; |
1666 | safi = SAFI_EVPN; | |
128ea8ab | 1667 | |
d62a17ae | 1668 | /* First, walk the global route table for this VNI's type-2 local |
1669 | * routes. | |
1670 | * EVPN routes are a 2-level table, first get the RD table. | |
1671 | */ | |
1672 | delete_global_type2_routes(bgp, vpn); | |
128ea8ab | 1673 | |
d62a17ae | 1674 | /* Next, walk this VNI's route table and delete local type-2 routes. */ |
1675 | for (rn = bgp_table_top(vpn->route_table); rn; | |
1676 | rn = bgp_route_next(rn)) { | |
1677 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
128ea8ab | 1678 | |
d62a17ae | 1679 | if (evp->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE) |
1680 | continue; | |
128ea8ab | 1681 | |
d62a17ae | 1682 | delete_evpn_route_entry(bgp, vpn, afi, safi, rn, &ri); |
128ea8ab | 1683 | |
d62a17ae | 1684 | /* Route entry in local table gets deleted immediately. */ |
1685 | if (ri) | |
1686 | bgp_info_reap(rn, ri); | |
1687 | } | |
128ea8ab | 1688 | |
d62a17ae | 1689 | return 0; |
128ea8ab | 1690 | } |
1691 | ||
1692 | /* | |
1693 | * Delete all routes in the per-VNI route table. | |
1694 | */ | |
d62a17ae | 1695 | static int delete_all_vni_routes(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1696 | { |
d62a17ae | 1697 | struct bgp_node *rn; |
1698 | struct bgp_info *ri, *nextri; | |
128ea8ab | 1699 | |
d62a17ae | 1700 | /* Walk this VNI's route table and delete all routes. */ |
1701 | for (rn = bgp_table_top(vpn->route_table); rn; | |
1702 | rn = bgp_route_next(rn)) { | |
1703 | for (ri = rn->info; (ri != NULL) && (nextri = ri->next, 1); | |
1704 | ri = nextri) { | |
1705 | bgp_info_delete(rn, ri); | |
1706 | bgp_info_reap(rn, ri); | |
1707 | } | |
1708 | } | |
128ea8ab | 1709 | |
d62a17ae | 1710 | return 0; |
128ea8ab | 1711 | } |
1712 | ||
1713 | /* | |
1714 | * Update (and advertise) local routes for a VNI. Invoked upon the VNI | |
1715 | * export RT getting modified or change to tunnel IP. Note that these | |
1716 | * situations need the route in the per-VNI table as well as the global | |
1717 | * table to be updated (as attributes change). | |
1718 | */ | |
d62a17ae | 1719 | static int update_routes_for_vni(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1720 | { |
d62a17ae | 1721 | int ret; |
1722 | struct prefix_evpn p; | |
128ea8ab | 1723 | |
d62a17ae | 1724 | /* Update and advertise the type-3 route (only one) followed by the |
1725 | * locally learnt type-2 routes (MACIP) - for this VNI. | |
1726 | */ | |
1727 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
1728 | ret = update_evpn_route(bgp, vpn, &p, 0); | |
1729 | if (ret) | |
1730 | return ret; | |
128ea8ab | 1731 | |
d62a17ae | 1732 | return update_all_type2_routes(bgp, vpn); |
128ea8ab | 1733 | } |
1734 | ||
1735 | /* | |
1736 | * Delete (and withdraw) local routes for specified VNI from the global | |
1737 | * table and per-VNI table. After this, remove all other routes from | |
1738 | * the per-VNI table. Invoked upon the VNI being deleted or EVPN | |
1739 | * (advertise-all-vni) being disabled. | |
1740 | */ | |
d62a17ae | 1741 | static int delete_routes_for_vni(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1742 | { |
d62a17ae | 1743 | int ret; |
1744 | struct prefix_evpn p; | |
128ea8ab | 1745 | |
d62a17ae | 1746 | /* Delete and withdraw locally learnt type-2 routes (MACIP) |
1747 | * followed by type-3 routes (only one) - for this VNI. | |
1748 | */ | |
1749 | ret = delete_all_type2_routes(bgp, vpn); | |
1750 | if (ret) | |
1751 | return ret; | |
128ea8ab | 1752 | |
d62a17ae | 1753 | build_evpn_type3_prefix(&p, vpn->originator_ip); |
1754 | ret = delete_evpn_route(bgp, vpn, &p); | |
1755 | if (ret) | |
1756 | return ret; | |
128ea8ab | 1757 | |
d62a17ae | 1758 | /* Delete all routes from the per-VNI table. */ |
1759 | return delete_all_vni_routes(bgp, vpn); | |
128ea8ab | 1760 | } |
1761 | ||
1762 | /* | |
1763 | * There is a tunnel endpoint IP address change for this VNI, | |
1764 | * need to re-advertise routes with the new nexthop. | |
1765 | */ | |
d62a17ae | 1766 | static int handle_tunnel_ip_change(struct bgp *bgp, struct bgpevpn *vpn, |
1767 | struct in_addr originator_ip) | |
128ea8ab | 1768 | { |
d62a17ae | 1769 | struct prefix_evpn p; |
128ea8ab | 1770 | |
ddd16ed5 MK |
1771 | /* If VNI is not live, we only need to update the originator ip */ |
1772 | if (!is_vni_live(vpn)) { | |
1773 | vpn->originator_ip = originator_ip; | |
1774 | return 0; | |
1775 | } | |
1776 | ||
db0e1937 MK |
1777 | /* Update the tunnel-ip hash */ |
1778 | bgp_tip_del(bgp, &vpn->originator_ip); | |
1779 | bgp_tip_add(bgp, &originator_ip); | |
1780 | ||
1781 | /* filter routes as martian nexthop db has changed */ | |
1782 | bgp_filter_evpn_routes_upon_martian_nh_change(bgp); | |
1783 | ||
d62a17ae | 1784 | /* Need to withdraw type-3 route as the originator IP is part |
1785 | * of the key. | |
1786 | */ | |
1787 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
1788 | delete_evpn_route(bgp, vpn, &p); | |
128ea8ab | 1789 | |
d62a17ae | 1790 | /* Update the tunnel IP and re-advertise all routes for this VNI. */ |
1791 | vpn->originator_ip = originator_ip; | |
1792 | return update_routes_for_vni(bgp, vpn); | |
128ea8ab | 1793 | } |
1794 | ||
d3135ba3 | 1795 | /* |
1796 | * Install route entry into the VRF routing table and invoke route selection. | |
1797 | */ | |
1798 | static int install_evpn_route_entry_in_vrf(struct bgp *bgp_vrf, | |
1799 | struct prefix_evpn *evp, | |
1800 | struct bgp_info *parent_ri) | |
1801 | { | |
1802 | struct bgp_node *rn; | |
1803 | struct bgp_info *ri; | |
1804 | struct attr *attr_new; | |
c4edf708 | 1805 | int ret = 0; |
d3135ba3 | 1806 | struct prefix p; |
1807 | struct prefix *pp = &p; | |
1808 | afi_t afi = 0; | |
1809 | safi_t safi = 0; | |
1eb88002 MK |
1810 | char buf[PREFIX_STRLEN]; |
1811 | char buf1[PREFIX_STRLEN]; | |
d3135ba3 | 1812 | |
1813 | memset(pp, 0, sizeof(struct prefix)); | |
90264d64 MK |
1814 | if (evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) |
1815 | ip_prefix_from_type2_prefix(evp, pp); | |
523cafc4 | 1816 | else if (evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE) |
90264d64 | 1817 | ip_prefix_from_type5_prefix(evp, pp); |
d3135ba3 | 1818 | |
1eb88002 MK |
1819 | if (bgp_debug_zebra(NULL)) { |
1820 | zlog_debug("installing evpn prefix %s as ip prefix %s in vrf %s", | |
1821 | prefix2str(evp, buf, sizeof(buf)), | |
1822 | prefix2str(pp, buf1, sizeof(buf)), | |
1823 | vrf_id_to_name(bgp_vrf->vrf_id)); | |
1824 | } | |
1825 | ||
d3135ba3 | 1826 | /* Create (or fetch) route within the VRF. */ |
1827 | /* NOTE: There is no RD here. */ | |
1828 | if (IS_EVPN_PREFIX_IPADDR_V4(evp)) { | |
1829 | afi = AFI_IP; | |
1830 | safi = SAFI_UNICAST; | |
1831 | rn = bgp_node_get(bgp_vrf->rib[afi][safi], pp); | |
1832 | } else if (IS_EVPN_PREFIX_IPADDR_V6(evp)) { | |
1833 | afi = AFI_IP6; | |
1834 | safi = SAFI_UNICAST; | |
1835 | rn = bgp_node_get(bgp_vrf->rib[afi][safi], pp); | |
1836 | } else | |
1837 | return 0; | |
1838 | ||
1839 | /* Check if route entry is already present. */ | |
1840 | for (ri = rn->info; ri; ri = ri->next) | |
1841 | if (ri->extra | |
1842 | && (struct bgp_info *)ri->extra->parent == parent_ri) | |
1843 | break; | |
1844 | ||
1845 | if (!ri) { | |
1846 | /* Add (or update) attribute to hash. */ | |
1847 | attr_new = bgp_attr_intern(parent_ri->attr); | |
1848 | ||
1849 | /* Create new route with its attribute. */ | |
1850 | ri = info_make(parent_ri->type, parent_ri->sub_type, 0, | |
1851 | parent_ri->peer, attr_new, rn); | |
1852 | SET_FLAG(ri->flags, BGP_INFO_VALID); | |
1853 | bgp_info_extra_get(ri); | |
1854 | ri->extra->parent = parent_ri; | |
b57ba6d2 | 1855 | if (parent_ri->extra) { |
d3135ba3 | 1856 | memcpy(&ri->extra->label, &parent_ri->extra->label, |
b57ba6d2 MK |
1857 | sizeof(ri->extra->label)); |
1858 | ri->extra->num_labels = parent_ri->extra->num_labels; | |
1859 | } | |
d3135ba3 | 1860 | bgp_info_add(rn, ri); |
1861 | } else { | |
1862 | if (attrhash_cmp(ri->attr, parent_ri->attr) | |
1863 | && !CHECK_FLAG(ri->flags, BGP_INFO_REMOVED)) { | |
1864 | bgp_unlock_node(rn); | |
1865 | return 0; | |
1866 | } | |
1867 | /* The attribute has changed. */ | |
1868 | /* Add (or update) attribute to hash. */ | |
1869 | attr_new = bgp_attr_intern(parent_ri->attr); | |
1870 | ||
1871 | /* Restore route, if needed. */ | |
1872 | if (CHECK_FLAG(ri->flags, BGP_INFO_REMOVED)) | |
1873 | bgp_info_restore(rn, ri); | |
1874 | ||
1875 | /* Mark if nexthop has changed. */ | |
1876 | if (!IPV4_ADDR_SAME(&ri->attr->nexthop, &attr_new->nexthop)) | |
1877 | SET_FLAG(ri->flags, BGP_INFO_IGP_CHANGED); | |
1878 | ||
1879 | /* Unintern existing, set to new. */ | |
1880 | bgp_attr_unintern(&ri->attr); | |
1881 | ri->attr = attr_new; | |
1882 | ri->uptime = bgp_clock(); | |
1883 | } | |
1884 | ||
1885 | /* Perform route selection and update zebra, if required. */ | |
1eb88002 | 1886 | bgp_process(bgp_vrf, rn, afi, safi); |
d3135ba3 | 1887 | |
1888 | return ret; | |
1889 | } | |
1890 | ||
128ea8ab | 1891 | /* |
1892 | * Install route entry into the VNI routing table and invoke route selection. | |
1893 | */ | |
d62a17ae | 1894 | static int install_evpn_route_entry(struct bgp *bgp, struct bgpevpn *vpn, |
1895 | struct prefix_evpn *p, | |
1896 | struct bgp_info *parent_ri) | |
1897 | { | |
1898 | struct bgp_node *rn; | |
1899 | struct bgp_info *ri; | |
1900 | struct attr *attr_new; | |
1901 | int ret; | |
1902 | ||
1903 | /* Create (or fetch) route within the VNI. */ | |
1904 | /* NOTE: There is no RD here. */ | |
1905 | rn = bgp_node_get(vpn->route_table, (struct prefix *)p); | |
1906 | ||
1907 | /* Check if route entry is already present. */ | |
1908 | for (ri = rn->info; ri; ri = ri->next) | |
1909 | if (ri->extra | |
1910 | && (struct bgp_info *)ri->extra->parent == parent_ri) | |
1911 | break; | |
1912 | ||
1913 | if (!ri) { | |
1914 | /* Add (or update) attribute to hash. */ | |
1915 | attr_new = bgp_attr_intern(parent_ri->attr); | |
1916 | ||
1917 | /* Create new route with its attribute. */ | |
1918 | ri = info_make(parent_ri->type, parent_ri->sub_type, 0, | |
1919 | parent_ri->peer, attr_new, rn); | |
1920 | SET_FLAG(ri->flags, BGP_INFO_VALID); | |
1921 | bgp_info_extra_get(ri); | |
1922 | ri->extra->parent = parent_ri; | |
b57ba6d2 | 1923 | if (parent_ri->extra) { |
d62a17ae | 1924 | memcpy(&ri->extra->label, &parent_ri->extra->label, |
b57ba6d2 MK |
1925 | sizeof(ri->extra->label)); |
1926 | ri->extra->num_labels = parent_ri->extra->num_labels; | |
1927 | } | |
d62a17ae | 1928 | bgp_info_add(rn, ri); |
1929 | } else { | |
1930 | if (attrhash_cmp(ri->attr, parent_ri->attr) | |
1931 | && !CHECK_FLAG(ri->flags, BGP_INFO_REMOVED)) { | |
1932 | bgp_unlock_node(rn); | |
1933 | return 0; | |
1934 | } | |
1935 | /* The attribute has changed. */ | |
1936 | /* Add (or update) attribute to hash. */ | |
1937 | attr_new = bgp_attr_intern(parent_ri->attr); | |
1938 | ||
1939 | /* Restore route, if needed. */ | |
1940 | if (CHECK_FLAG(ri->flags, BGP_INFO_REMOVED)) | |
1941 | bgp_info_restore(rn, ri); | |
1942 | ||
1943 | /* Mark if nexthop has changed. */ | |
1944 | if (!IPV4_ADDR_SAME(&ri->attr->nexthop, &attr_new->nexthop)) | |
1945 | SET_FLAG(ri->flags, BGP_INFO_IGP_CHANGED); | |
1946 | ||
1947 | /* Unintern existing, set to new. */ | |
1948 | bgp_attr_unintern(&ri->attr); | |
1949 | ri->attr = attr_new; | |
1950 | ri->uptime = bgp_clock(); | |
1951 | } | |
1952 | ||
1953 | /* Perform route selection and update zebra, if required. */ | |
1954 | ret = evpn_route_select_install(bgp, vpn, rn); | |
1955 | ||
1956 | return ret; | |
128ea8ab | 1957 | } |
1958 | ||
d3135ba3 | 1959 | /* |
1960 | * Uninstall route entry from the VRF routing table and send message | |
1961 | * to zebra, if appropriate. | |
1962 | */ | |
1963 | static int uninstall_evpn_route_entry_in_vrf(struct bgp *bgp_vrf, | |
1964 | struct prefix_evpn *evp, | |
1965 | struct bgp_info *parent_ri) | |
1966 | { | |
1967 | struct bgp_node *rn; | |
1968 | struct bgp_info *ri; | |
c4edf708 | 1969 | int ret = 0; |
d3135ba3 | 1970 | struct prefix p; |
1971 | struct prefix *pp = &p; | |
1972 | afi_t afi = 0; | |
1973 | safi_t safi = 0; | |
1eb88002 MK |
1974 | char buf[PREFIX_STRLEN]; |
1975 | char buf1[PREFIX_STRLEN]; | |
d3135ba3 | 1976 | |
1977 | memset(pp, 0, sizeof(struct prefix)); | |
42cb44f2 MK |
1978 | if (evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) |
1979 | ip_prefix_from_type2_prefix(evp, pp); | |
655b04d1 | 1980 | else if (evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE) |
42cb44f2 | 1981 | ip_prefix_from_type5_prefix(evp, pp); |
d3135ba3 | 1982 | |
1eb88002 | 1983 | if (bgp_debug_zebra(NULL)) { |
30a30f57 | 1984 | zlog_debug("uninstalling evpn prefix %s as ip prefix %s in vrf %s", |
1eb88002 MK |
1985 | prefix2str(evp, buf, sizeof(buf)), |
1986 | prefix2str(pp, buf1, sizeof(buf)), | |
1987 | vrf_id_to_name(bgp_vrf->vrf_id)); | |
1988 | } | |
1989 | ||
d3135ba3 | 1990 | /* Locate route within the VRF. */ |
1991 | /* NOTE: There is no RD here. */ | |
1992 | if (IS_EVPN_PREFIX_IPADDR_V4(evp)) { | |
1993 | afi = AFI_IP; | |
1994 | safi = SAFI_UNICAST; | |
1995 | rn = bgp_node_lookup(bgp_vrf->rib[afi][safi], pp); | |
1996 | } else { | |
1997 | afi = AFI_IP6; | |
1998 | safi = SAFI_UNICAST; | |
1999 | rn = bgp_node_lookup(bgp_vrf->rib[afi][safi], pp); | |
2000 | } | |
2001 | ||
2002 | if (!rn) | |
2003 | return 0; | |
2004 | ||
2005 | /* Find matching route entry. */ | |
2006 | for (ri = rn->info; ri; ri = ri->next) | |
2007 | if (ri->extra | |
2008 | && (struct bgp_info *)ri->extra->parent == parent_ri) | |
2009 | break; | |
2010 | ||
2011 | if (!ri) | |
2012 | return 0; | |
2013 | ||
2014 | /* Mark entry for deletion */ | |
2015 | bgp_info_delete(rn, ri); | |
2016 | ||
2017 | /* Perform route selection and update zebra, if required. */ | |
1eb88002 | 2018 | bgp_process(bgp_vrf, rn, afi, safi); |
d3135ba3 | 2019 | |
2020 | /* Unlock route node. */ | |
2021 | bgp_unlock_node(rn); | |
2022 | ||
2023 | return ret; | |
2024 | } | |
2025 | ||
128ea8ab | 2026 | /* |
2027 | * Uninstall route entry from the VNI routing table and send message | |
2028 | * to zebra, if appropriate. | |
2029 | */ | |
d62a17ae | 2030 | static int uninstall_evpn_route_entry(struct bgp *bgp, struct bgpevpn *vpn, |
2031 | struct prefix_evpn *p, | |
2032 | struct bgp_info *parent_ri) | |
128ea8ab | 2033 | { |
d62a17ae | 2034 | struct bgp_node *rn; |
2035 | struct bgp_info *ri; | |
2036 | int ret; | |
128ea8ab | 2037 | |
d62a17ae | 2038 | /* Locate route within the VNI. */ |
2039 | /* NOTE: There is no RD here. */ | |
2040 | rn = bgp_node_lookup(vpn->route_table, (struct prefix *)p); | |
2041 | if (!rn) | |
2042 | return 0; | |
128ea8ab | 2043 | |
d62a17ae | 2044 | /* Find matching route entry. */ |
2045 | for (ri = rn->info; ri; ri = ri->next) | |
2046 | if (ri->extra | |
2047 | && (struct bgp_info *)ri->extra->parent == parent_ri) | |
2048 | break; | |
128ea8ab | 2049 | |
d62a17ae | 2050 | if (!ri) |
2051 | return 0; | |
128ea8ab | 2052 | |
d62a17ae | 2053 | /* Mark entry for deletion */ |
2054 | bgp_info_delete(rn, ri); | |
128ea8ab | 2055 | |
d62a17ae | 2056 | /* Perform route selection and update zebra, if required. */ |
2057 | ret = evpn_route_select_install(bgp, vpn, rn); | |
128ea8ab | 2058 | |
d62a17ae | 2059 | /* Unlock route node. */ |
2060 | bgp_unlock_node(rn); | |
128ea8ab | 2061 | |
d62a17ae | 2062 | return ret; |
128ea8ab | 2063 | } |
2064 | ||
5ba238b7 MK |
2065 | /* |
2066 | * Given a route entry and a VRF, see if this route entry should be | |
2067 | * imported into the VRF i.e., RTs match. | |
2068 | */ | |
2069 | static int is_route_matching_for_vrf(struct bgp *bgp_vrf, | |
2070 | struct bgp_info *ri) | |
2071 | { | |
2072 | struct attr *attr = ri->attr; | |
2073 | struct ecommunity *ecom; | |
2074 | int i; | |
2075 | ||
2076 | assert(attr); | |
2077 | /* Route should have valid RT to be even considered. */ | |
2078 | if (!(attr->flag & ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES))) | |
2079 | return 0; | |
2080 | ||
2081 | ecom = attr->ecommunity; | |
2082 | if (!ecom || !ecom->size) | |
2083 | return 0; | |
2084 | ||
2085 | /* For each extended community RT, see if it matches this VNI. If any RT | |
2086 | * matches, we're done. | |
2087 | */ | |
2088 | for (i = 0; i < ecom->size; i++) { | |
2089 | u_char *pnt; | |
2090 | u_char type, sub_type; | |
2091 | struct ecommunity_val *eval; | |
2092 | struct ecommunity_val eval_tmp; | |
2093 | struct vrf_irt_node *irt; | |
2094 | ||
2095 | /* Only deal with RTs */ | |
2096 | pnt = (ecom->val + (i * ECOMMUNITY_SIZE)); | |
2097 | eval = (struct ecommunity_val *)(ecom->val | |
2098 | + (i * ECOMMUNITY_SIZE)); | |
2099 | type = *pnt++; | |
2100 | sub_type = *pnt++; | |
2101 | if (sub_type != ECOMMUNITY_ROUTE_TARGET) | |
2102 | continue; | |
2103 | ||
2104 | /* See if this RT matches specified VNIs import RTs */ | |
2105 | irt = lookup_vrf_import_rt(eval); | |
2106 | if (irt && irt->vrfs) | |
2107 | if (is_vrf_present_in_irt_vrfs(irt->vrfs, bgp_vrf)) | |
2108 | return 1; | |
2109 | ||
2110 | /* Also check for non-exact match. In this, we mask out the AS | |
2111 | * and | |
2112 | * only check on the local-admin sub-field. This is to | |
2113 | * facilitate using | |
2114 | * VNI as the RT for EBGP peering too. | |
2115 | */ | |
2116 | irt = NULL; | |
2117 | if (type == ECOMMUNITY_ENCODE_AS | |
2118 | || type == ECOMMUNITY_ENCODE_AS4 | |
2119 | || type == ECOMMUNITY_ENCODE_IP) { | |
2120 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
2121 | mask_ecom_global_admin(&eval_tmp, eval); | |
2122 | irt = lookup_vrf_import_rt(&eval_tmp); | |
2123 | } | |
2124 | if (irt && irt->vrfs) | |
2125 | if (is_vrf_present_in_irt_vrfs(irt->vrfs, bgp_vrf)) | |
2126 | return 1; | |
2127 | } | |
2128 | ||
2129 | return 0; | |
2130 | } | |
2131 | ||
128ea8ab | 2132 | /* |
2133 | * Given a route entry and a VNI, see if this route entry should be | |
2134 | * imported into the VNI i.e., RTs match. | |
2135 | */ | |
d62a17ae | 2136 | static int is_route_matching_for_vni(struct bgp *bgp, struct bgpevpn *vpn, |
2137 | struct bgp_info *ri) | |
2138 | { | |
2139 | struct attr *attr = ri->attr; | |
2140 | struct ecommunity *ecom; | |
2141 | int i; | |
2142 | ||
2143 | assert(attr); | |
2144 | /* Route should have valid RT to be even considered. */ | |
2145 | if (!(attr->flag & ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES))) | |
2146 | return 0; | |
2147 | ||
2148 | ecom = attr->ecommunity; | |
2149 | if (!ecom || !ecom->size) | |
2150 | return 0; | |
2151 | ||
2152 | /* For each extended community RT, see if it matches this VNI. If any RT | |
2153 | * matches, we're done. | |
2154 | */ | |
2155 | for (i = 0; i < ecom->size; i++) { | |
2156 | u_char *pnt; | |
2157 | u_char type, sub_type; | |
2158 | struct ecommunity_val *eval; | |
2159 | struct ecommunity_val eval_tmp; | |
2160 | struct irt_node *irt; | |
2161 | ||
2162 | /* Only deal with RTs */ | |
2163 | pnt = (ecom->val + (i * ECOMMUNITY_SIZE)); | |
2164 | eval = (struct ecommunity_val *)(ecom->val | |
2165 | + (i * ECOMMUNITY_SIZE)); | |
2166 | type = *pnt++; | |
2167 | sub_type = *pnt++; | |
2168 | if (sub_type != ECOMMUNITY_ROUTE_TARGET) | |
2169 | continue; | |
2170 | ||
2171 | /* See if this RT matches specified VNIs import RTs */ | |
2172 | irt = lookup_import_rt(bgp, eval); | |
2173 | if (irt && irt->vnis) | |
2174 | if (is_vni_present_in_irt_vnis(irt->vnis, vpn)) | |
2175 | return 1; | |
2176 | ||
2177 | /* Also check for non-exact match. In this, we mask out the AS | |
2178 | * and | |
2179 | * only check on the local-admin sub-field. This is to | |
2180 | * facilitate using | |
2181 | * VNI as the RT for EBGP peering too. | |
2182 | */ | |
2183 | irt = NULL; | |
2184 | if (type == ECOMMUNITY_ENCODE_AS | |
2185 | || type == ECOMMUNITY_ENCODE_AS4 | |
2186 | || type == ECOMMUNITY_ENCODE_IP) { | |
2187 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
2188 | mask_ecom_global_admin(&eval_tmp, eval); | |
2189 | irt = lookup_import_rt(bgp, &eval_tmp); | |
2190 | } | |
2191 | if (irt && irt->vnis) | |
2192 | if (is_vni_present_in_irt_vnis(irt->vnis, vpn)) | |
2193 | return 1; | |
2194 | } | |
2195 | ||
2196 | return 0; | |
128ea8ab | 2197 | } |
2198 | ||
5ba238b7 MK |
2199 | /* |
2200 | * Install or uninstall mac-ip routes are appropriate for this | |
2201 | * particular VRF. | |
2202 | */ | |
2203 | static int install_uninstall_routes_for_vrf(struct bgp *bgp_vrf, | |
2204 | int install) | |
2205 | { | |
2206 | afi_t afi; | |
2207 | safi_t safi; | |
2208 | struct bgp_node *rd_rn, *rn; | |
2209 | struct bgp_table *table; | |
2210 | struct bgp_info *ri; | |
2211 | int ret; | |
2212 | char buf[PREFIX_STRLEN]; | |
2213 | struct bgp *bgp_def = NULL; | |
2214 | ||
2215 | afi = AFI_L2VPN; | |
2216 | safi = SAFI_EVPN; | |
2217 | bgp_def = bgp_get_default(); | |
2218 | if (!bgp_def) | |
2219 | return -1; | |
2220 | ||
2221 | /* Walk entire global routing table and evaluate routes which could be | |
2222 | * imported into this VRF. Note that we need to loop through all global | |
2223 | * routes to determine which route matches the import rt on vrf | |
2224 | */ | |
2225 | for (rd_rn = bgp_table_top(bgp_def->rib[afi][safi]); rd_rn; | |
2226 | rd_rn = bgp_route_next(rd_rn)) { | |
2227 | table = (struct bgp_table *)(rd_rn->info); | |
2228 | if (!table) | |
2229 | continue; | |
2230 | ||
2231 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) { | |
2232 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
2233 | ||
1eb88002 | 2234 | /* if not mac-ip route skip this route */ |
42cb44f2 MK |
2235 | if (!(evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE || |
2236 | evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE)) | |
5ba238b7 MK |
2237 | continue; |
2238 | ||
1eb88002 MK |
2239 | /* if not a mac+ip route skip this route */ |
2240 | if (!(IS_EVPN_PREFIX_IPADDR_V4(evp) || | |
2241 | IS_EVPN_PREFIX_IPADDR_V6(evp))) | |
2242 | continue; | |
2243 | ||
5ba238b7 MK |
2244 | for (ri = rn->info; ri; ri = ri->next) { |
2245 | /* Consider "valid" remote routes applicable for | |
523cafc4 | 2246 | * this VRF. |
2247 | */ | |
5ba238b7 MK |
2248 | if (!(CHECK_FLAG(ri->flags, BGP_INFO_VALID) |
2249 | && ri->type == ZEBRA_ROUTE_BGP | |
2250 | && ri->sub_type == BGP_ROUTE_NORMAL)) | |
2251 | continue; | |
2252 | ||
2253 | if (is_route_matching_for_vrf(bgp_vrf, ri)) { | |
2254 | if (install) | |
2255 | ret = | |
2256 | install_evpn_route_entry_in_vrf( | |
2257 | bgp_vrf, evp, ri); | |
2258 | else | |
2259 | ret = | |
2260 | uninstall_evpn_route_entry_in_vrf( | |
2261 | bgp_vrf, evp, ri); | |
2262 | ||
2263 | if (ret) { | |
2264 | zlog_err( | |
2265 | "Failed to %s EVPN %s route in VRF %s", | |
2266 | install ? "install" | |
2267 | : "uninstall", | |
2268 | prefix2str(evp, buf, | |
2269 | sizeof(buf)), | |
2270 | vrf_id_to_name(bgp_vrf->vrf_id)); | |
2271 | return ret; | |
2272 | } | |
2273 | } | |
2274 | } | |
2275 | } | |
2276 | } | |
2277 | ||
2278 | return 0; | |
2279 | } | |
2280 | ||
128ea8ab | 2281 | /* |
2282 | * Install or uninstall routes of specified type that are appropriate for this | |
2283 | * particular VNI. | |
2284 | */ | |
d62a17ae | 2285 | static int install_uninstall_routes_for_vni(struct bgp *bgp, |
2286 | struct bgpevpn *vpn, | |
2287 | bgp_evpn_route_type rtype, | |
2288 | int install) | |
2289 | { | |
0291c246 MK |
2290 | afi_t afi; |
2291 | safi_t safi; | |
2292 | struct bgp_node *rd_rn, *rn; | |
2293 | struct bgp_table *table; | |
2294 | struct bgp_info *ri; | |
2295 | int ret; | |
d62a17ae | 2296 | |
2297 | afi = AFI_L2VPN; | |
2298 | safi = SAFI_EVPN; | |
2299 | ||
2300 | /* Walk entire global routing table and evaluate routes which could be | |
2301 | * imported into this VPN. Note that we cannot just look at the routes | |
2302 | * for | |
2303 | * the VNI's RD - remote routes applicable for this VNI could have any | |
2304 | * RD. | |
2305 | */ | |
2306 | /* EVPN routes are a 2-level table. */ | |
2307 | for (rd_rn = bgp_table_top(bgp->rib[afi][safi]); rd_rn; | |
2308 | rd_rn = bgp_route_next(rd_rn)) { | |
2309 | table = (struct bgp_table *)(rd_rn->info); | |
2310 | if (!table) | |
2311 | continue; | |
2312 | ||
2313 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) { | |
2314 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
2315 | ||
2316 | if (evp->prefix.route_type != rtype) | |
2317 | continue; | |
2318 | ||
2319 | for (ri = rn->info; ri; ri = ri->next) { | |
2320 | /* Consider "valid" remote routes applicable for | |
2321 | * this VNI. */ | |
2322 | if (!(CHECK_FLAG(ri->flags, BGP_INFO_VALID) | |
2323 | && ri->type == ZEBRA_ROUTE_BGP | |
2324 | && ri->sub_type == BGP_ROUTE_NORMAL)) | |
2325 | continue; | |
2326 | ||
2327 | if (is_route_matching_for_vni(bgp, vpn, ri)) { | |
2328 | if (install) | |
2329 | ret = install_evpn_route_entry( | |
60466a63 | 2330 | bgp, vpn, evp, ri); |
d62a17ae | 2331 | else |
2332 | ret = uninstall_evpn_route_entry( | |
2333 | bgp, vpn, evp, ri); | |
2334 | ||
2335 | if (ret) { | |
2336 | zlog_err( | |
2337 | "%u: Failed to %s EVPN %s route in VNI %u", | |
2338 | bgp->vrf_id, | |
2339 | install ? "install" | |
2340 | : "uninstall", | |
2341 | rtype == BGP_EVPN_MAC_IP_ROUTE | |
2342 | ? "MACIP" | |
2343 | : "IMET", | |
2344 | vpn->vni); | |
2345 | return ret; | |
2346 | } | |
2347 | } | |
2348 | } | |
2349 | } | |
2350 | } | |
2351 | ||
2352 | return 0; | |
128ea8ab | 2353 | } |
2354 | ||
5ba238b7 | 2355 | /* Install any existing remote routes applicable for this VRF into VRF RIB. This |
523cafc4 | 2356 | * is invoked upon l3vni-add or l3vni import rt change |
2357 | */ | |
5ba238b7 MK |
2358 | static int install_routes_for_vrf(struct bgp *bgp_vrf) |
2359 | { | |
2360 | install_uninstall_routes_for_vrf(bgp_vrf, 1); | |
2361 | return 0; | |
2362 | } | |
2363 | ||
128ea8ab | 2364 | /* |
2365 | * Install any existing remote routes applicable for this VNI into its | |
2366 | * routing table. This is invoked when a VNI becomes "live" or its Import | |
2367 | * RT is changed. | |
2368 | */ | |
d62a17ae | 2369 | static int install_routes_for_vni(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 2370 | { |
d62a17ae | 2371 | int ret; |
128ea8ab | 2372 | |
d62a17ae | 2373 | /* Install type-3 routes followed by type-2 routes - the ones applicable |
2374 | * for this VNI. | |
2375 | */ | |
2376 | ret = install_uninstall_routes_for_vni(bgp, vpn, BGP_EVPN_IMET_ROUTE, | |
2377 | 1); | |
2378 | if (ret) | |
2379 | return ret; | |
128ea8ab | 2380 | |
d62a17ae | 2381 | return install_uninstall_routes_for_vni(bgp, vpn, BGP_EVPN_MAC_IP_ROUTE, |
2382 | 1); | |
128ea8ab | 2383 | } |
2384 | ||
5ba238b7 MK |
2385 | /* uninstall routes from l3vni vrf. */ |
2386 | static int uninstall_routes_for_vrf(struct bgp *bgp_vrf) | |
2387 | { | |
2388 | install_uninstall_routes_for_vrf(bgp_vrf, 0); | |
2389 | return 0; | |
2390 | } | |
2391 | ||
90e60aa7 | 2392 | /* |
2393 | * Uninstall any existing remote routes for this VNI. One scenario in which | |
2394 | * this is invoked is upon an import RT change. | |
2395 | */ | |
d62a17ae | 2396 | static int uninstall_routes_for_vni(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 2397 | { |
d62a17ae | 2398 | int ret; |
90e60aa7 | 2399 | |
d62a17ae | 2400 | /* Uninstall type-2 routes followed by type-3 routes - the ones |
2401 | * applicable | |
2402 | * for this VNI. | |
2403 | */ | |
2404 | ret = install_uninstall_routes_for_vni(bgp, vpn, BGP_EVPN_MAC_IP_ROUTE, | |
2405 | 0); | |
2406 | if (ret) | |
2407 | return ret; | |
90e60aa7 | 2408 | |
d62a17ae | 2409 | return install_uninstall_routes_for_vni(bgp, vpn, BGP_EVPN_IMET_ROUTE, |
2410 | 0); | |
90e60aa7 | 2411 | } |
2412 | ||
d3135ba3 | 2413 | /* |
2414 | * Install or uninstall route in matching VRFs (list). | |
2415 | */ | |
2416 | static int install_uninstall_route_in_vrfs(struct bgp *bgp_def, afi_t afi, | |
2417 | safi_t safi, struct prefix_evpn *evp, | |
2418 | struct bgp_info *ri, | |
2419 | struct list *vrfs, int install) | |
2420 | { | |
2421 | char buf[PREFIX2STR_BUFFER]; | |
2422 | struct bgp *bgp_vrf; | |
2423 | struct listnode *node, *nnode; | |
2424 | ||
90264d64 MK |
2425 | /* Only type-2/type-5 routes go into a VRF */ |
2426 | if (!(evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE || | |
2427 | evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE)) | |
d3135ba3 | 2428 | return 0; |
2429 | ||
90264d64 MK |
2430 | /* if it is type-2 route and not a mac+ip route skip this route */ |
2431 | if ((evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) && | |
2432 | !(IS_EVPN_PREFIX_IPADDR_V4(evp) || IS_EVPN_PREFIX_IPADDR_V6(evp))) | |
30a30f57 MK |
2433 | return 0; |
2434 | ||
d3135ba3 | 2435 | for (ALL_LIST_ELEMENTS(vrfs, node, nnode, bgp_vrf)) { |
2436 | int ret; | |
2437 | ||
2438 | if (install) | |
2439 | ret = install_evpn_route_entry_in_vrf(bgp_vrf, | |
2440 | evp, ri); | |
2441 | else | |
2442 | ret = uninstall_evpn_route_entry_in_vrf(bgp_vrf, | |
2443 | evp, ri); | |
2444 | ||
2445 | if (ret) { | |
2446 | zlog_err("%u: Failed to %s prefix %s in VRF %s", | |
2447 | bgp_def->vrf_id, | |
2448 | install ? "install" : "uninstall", | |
2449 | prefix2str(evp, buf, sizeof(buf)), | |
2450 | vrf_id_to_name(bgp_vrf->vrf_id)); | |
2451 | return ret; | |
2452 | } | |
2453 | } | |
2454 | ||
2455 | return 0; | |
2456 | } | |
2457 | ||
128ea8ab | 2458 | /* |
2459 | * Install or uninstall route in matching VNIs (list). | |
2460 | */ | |
d62a17ae | 2461 | static int install_uninstall_route_in_vnis(struct bgp *bgp, afi_t afi, |
2462 | safi_t safi, struct prefix_evpn *evp, | |
2463 | struct bgp_info *ri, | |
2464 | struct list *vnis, int install) | |
128ea8ab | 2465 | { |
d62a17ae | 2466 | struct bgpevpn *vpn; |
2467 | struct listnode *node, *nnode; | |
128ea8ab | 2468 | |
d62a17ae | 2469 | for (ALL_LIST_ELEMENTS(vnis, node, nnode, vpn)) { |
2470 | int ret; | |
128ea8ab | 2471 | |
d62a17ae | 2472 | if (!is_vni_live(vpn)) |
2473 | continue; | |
128ea8ab | 2474 | |
d62a17ae | 2475 | if (install) |
2476 | ret = install_evpn_route_entry(bgp, vpn, evp, ri); | |
2477 | else | |
2478 | ret = uninstall_evpn_route_entry(bgp, vpn, evp, ri); | |
128ea8ab | 2479 | |
d62a17ae | 2480 | if (ret) { |
2481 | zlog_err("%u: Failed to %s EVPN %s route in VNI %u", | |
2482 | bgp->vrf_id, install ? "install" : "uninstall", | |
2483 | evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE | |
2484 | ? "MACIP" | |
2485 | : "IMET", | |
2486 | vpn->vni); | |
2487 | return ret; | |
2488 | } | |
2489 | } | |
128ea8ab | 2490 | |
d62a17ae | 2491 | return 0; |
128ea8ab | 2492 | } |
2493 | ||
2494 | /* | |
2495 | * Install or uninstall route for appropriate VNIs. | |
2496 | */ | |
d62a17ae | 2497 | static int install_uninstall_evpn_route(struct bgp *bgp, afi_t afi, safi_t safi, |
2498 | struct prefix *p, struct bgp_info *ri, | |
2499 | int import) | |
2500 | { | |
2501 | struct prefix_evpn *evp = (struct prefix_evpn *)p; | |
2502 | struct attr *attr = ri->attr; | |
2503 | struct ecommunity *ecom; | |
2504 | int i; | |
2505 | ||
2506 | assert(attr); | |
2507 | ||
90264d64 | 2508 | /* Only type-2 and type-3 and type-5 are supported currently */ |
d62a17ae | 2509 | if (!(evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE |
90264d64 MK |
2510 | || evp->prefix.route_type == BGP_EVPN_IMET_ROUTE |
2511 | || evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE)) | |
d62a17ae | 2512 | return 0; |
2513 | ||
2514 | /* If we don't have Route Target, nothing much to do. */ | |
2515 | if (!(attr->flag & ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES))) | |
2516 | return 0; | |
2517 | ||
2518 | ecom = attr->ecommunity; | |
2519 | if (!ecom || !ecom->size) | |
2520 | return -1; | |
2521 | ||
90264d64 MK |
2522 | /* For each extended community RT, see which VNIs/VRFs match and import |
2523 | * the route into matching VNIs/VRFs. | |
d62a17ae | 2524 | */ |
2525 | for (i = 0; i < ecom->size; i++) { | |
2526 | u_char *pnt; | |
2527 | u_char type, sub_type; | |
2528 | struct ecommunity_val *eval; | |
2529 | struct ecommunity_val eval_tmp; | |
d3135ba3 | 2530 | struct irt_node *irt; /* import rt for l2vni */ |
2531 | struct vrf_irt_node *vrf_irt; /* import rt for l3vni */ | |
d62a17ae | 2532 | |
2533 | /* Only deal with RTs */ | |
2534 | pnt = (ecom->val + (i * ECOMMUNITY_SIZE)); | |
2535 | eval = (struct ecommunity_val *)(ecom->val | |
2536 | + (i * ECOMMUNITY_SIZE)); | |
2537 | type = *pnt++; | |
2538 | sub_type = *pnt++; | |
2539 | if (sub_type != ECOMMUNITY_ROUTE_TARGET) | |
2540 | continue; | |
2541 | ||
90264d64 | 2542 | /* Import route into matching l2-vnis (type-2/type-3 routes go |
523cafc4 | 2543 | * into l2vni table) |
2544 | */ | |
d62a17ae | 2545 | irt = lookup_import_rt(bgp, eval); |
2546 | if (irt && irt->vnis) | |
2547 | install_uninstall_route_in_vnis(bgp, afi, safi, evp, ri, | |
2548 | irt->vnis, import); | |
2549 | ||
90264d64 | 2550 | /* Import route into matching l3-vnis (type-2/type-5 routes go |
523cafc4 | 2551 | * into l3vni/vrf table) |
2552 | */ | |
d3135ba3 | 2553 | vrf_irt = lookup_vrf_import_rt(eval); |
2554 | if (vrf_irt && vrf_irt->vrfs) | |
2555 | install_uninstall_route_in_vrfs(bgp, afi, safi, evp, ri, | |
2556 | vrf_irt->vrfs, import); | |
2557 | ||
90264d64 MK |
2558 | /* Also check for non-exact match. In this, |
2559 | * we mask out the AS and | |
2560 | * only check on the local-admin sub-field. | |
2561 | * This is to facilitate using | |
d62a17ae | 2562 | * VNI as the RT for EBGP peering too. |
2563 | */ | |
2564 | irt = NULL; | |
d3135ba3 | 2565 | vrf_irt = NULL; |
d62a17ae | 2566 | if (type == ECOMMUNITY_ENCODE_AS |
2567 | || type == ECOMMUNITY_ENCODE_AS4 | |
2568 | || type == ECOMMUNITY_ENCODE_IP) { | |
2569 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
2570 | mask_ecom_global_admin(&eval_tmp, eval); | |
2571 | irt = lookup_import_rt(bgp, &eval_tmp); | |
d3135ba3 | 2572 | vrf_irt = lookup_vrf_import_rt(&eval_tmp); |
d62a17ae | 2573 | } |
2574 | if (irt && irt->vnis) | |
2575 | install_uninstall_route_in_vnis(bgp, afi, safi, evp, ri, | |
2576 | irt->vnis, import); | |
d3135ba3 | 2577 | if (vrf_irt && vrf_irt->vrfs) |
2578 | install_uninstall_route_in_vrfs(bgp, afi, safi, evp, | |
2579 | ri, vrf_irt->vrfs, | |
2580 | import); | |
d62a17ae | 2581 | } |
2582 | ||
2583 | return 0; | |
128ea8ab | 2584 | } |
2585 | ||
80b140af MK |
2586 | /* delete and withdraw all ipv4 and ipv6 routes in the vrf table as type-5 |
2587 | * routes */ | |
2588 | static void delete_withdraw_vrf_routes(struct bgp *bgp_vrf) | |
2589 | { | |
2590 | /* delete all ipv4 routes and withdraw from peers */ | |
053905d2 | 2591 | bgp_evpn_withdraw_type5_routes(bgp_vrf, AFI_IP, SAFI_UNICAST); |
80b140af MK |
2592 | |
2593 | /* delete all ipv6 routes and withdraw from peers */ | |
053905d2 | 2594 | bgp_evpn_withdraw_type5_routes(bgp_vrf, AFI_IP6, SAFI_UNICAST); |
80b140af MK |
2595 | } |
2596 | ||
2597 | /* update and advertise all ipv4 and ipv6 routes in thr vrf table as type-5 | |
2598 | * routes */ | |
2599 | static void update_advertise_vrf_routes(struct bgp *bgp_vrf) | |
2600 | { | |
2601 | /* update all ipv4 routes */ | |
053905d2 | 2602 | bgp_evpn_advertise_type5_routes(bgp_vrf, AFI_IP, SAFI_UNICAST); |
80b140af MK |
2603 | |
2604 | /* update all ipv6 routes */ | |
053905d2 | 2605 | bgp_evpn_advertise_type5_routes(bgp_vrf, AFI_IP6, SAFI_UNICAST); |
80b140af MK |
2606 | } |
2607 | ||
676f83b9 | 2608 | /* |
2609 | * update and advertise local routes for a VRF as type-5 routes. | |
2610 | * This is invoked upon RD change for a VRF. Note taht the processing is only | |
2611 | * done in the global route table using the routes which already exist in the | |
2612 | * VRF routing table | |
2613 | */ | |
80b140af | 2614 | static void update_router_id_vrf(struct bgp *bgp_vrf) |
676f83b9 | 2615 | { |
80b140af MK |
2616 | /* skip if the RD is configured */ |
2617 | if (is_vrf_rd_configured(bgp_vrf)) | |
2618 | return; | |
2619 | ||
2620 | /* derive the RD for the VRF based on new router-id */ | |
2621 | bgp_evpn_derive_auto_rd_for_vrf(bgp_vrf); | |
2622 | ||
2623 | /* update advertise ipv4|ipv6 routes as type-5 routes */ | |
2624 | update_advertise_vrf_routes(bgp_vrf); | |
676f83b9 | 2625 | } |
2626 | ||
2627 | /* | |
2628 | * Delete and withdraw all type-5 routes for the RD corresponding to VRF. | |
2629 | * This is invoked upon VRF RD change. The processing is done only from global | |
2630 | * table. | |
2631 | */ | |
80b140af | 2632 | static void withdraw_router_id_vrf(struct bgp *bgp_vrf) |
676f83b9 | 2633 | { |
80b140af MK |
2634 | /* skip if the RD is configured */ |
2635 | if (is_vrf_rd_configured(bgp_vrf)) | |
2636 | return; | |
2637 | ||
2638 | /* delete/withdraw ipv4|ipv6 routes as type-5 routes */ | |
2639 | delete_withdraw_vrf_routes(bgp_vrf); | |
676f83b9 | 2640 | } |
2641 | ||
90e60aa7 | 2642 | /* |
2643 | * Update and advertise local routes for a VNI. Invoked upon router-id | |
2644 | * change. Note that the processing is done only on the global route table | |
2645 | * using routes that already exist in the per-VNI table. | |
2646 | */ | |
d62a17ae | 2647 | static int update_advertise_vni_routes(struct bgp *bgp, struct bgpevpn *vpn) |
2648 | { | |
2649 | struct prefix_evpn p; | |
2650 | struct bgp_node *rn, *global_rn; | |
2651 | struct bgp_info *ri, *global_ri; | |
2652 | struct attr *attr; | |
2653 | afi_t afi = AFI_L2VPN; | |
2654 | safi_t safi = SAFI_EVPN; | |
2655 | ||
2656 | /* Locate type-3 route for VNI in the per-VNI table and use its | |
2657 | * attributes to create and advertise the type-3 route for this VNI | |
2658 | * in the global table. | |
2659 | */ | |
2660 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
2661 | rn = bgp_node_lookup(vpn->route_table, (struct prefix *)&p); | |
2662 | if (!rn) /* unexpected */ | |
2663 | return 0; | |
2664 | for (ri = rn->info; ri; ri = ri->next) | |
2665 | if (ri->peer == bgp->peer_self && ri->type == ZEBRA_ROUTE_BGP | |
2666 | && ri->sub_type == BGP_ROUTE_STATIC) | |
2667 | break; | |
2668 | if (!ri) /* unexpected */ | |
2669 | return 0; | |
2670 | attr = ri->attr; | |
2671 | ||
2672 | global_rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, | |
2673 | (struct prefix *)&p, &vpn->prd); | |
1a98c087 MK |
2674 | update_evpn_route_entry(bgp, vpn, afi, safi, global_rn, attr, 1, 0, &ri, |
2675 | 0); | |
d62a17ae | 2676 | |
2677 | /* Schedule for processing and unlock node. */ | |
2678 | bgp_process(bgp, global_rn, afi, safi); | |
2679 | bgp_unlock_node(global_rn); | |
2680 | ||
2681 | /* Now, walk this VNI's route table and use the route and its attribute | |
2682 | * to create and schedule route in global table. | |
2683 | */ | |
2684 | for (rn = bgp_table_top(vpn->route_table); rn; | |
2685 | rn = bgp_route_next(rn)) { | |
2686 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
2687 | ||
2688 | /* Identify MAC-IP local routes. */ | |
2689 | if (evp->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE) | |
2690 | continue; | |
2691 | ||
2692 | for (ri = rn->info; ri; ri = ri->next) | |
2693 | if (ri->peer == bgp->peer_self | |
2694 | && ri->type == ZEBRA_ROUTE_BGP | |
2695 | && ri->sub_type == BGP_ROUTE_STATIC) | |
2696 | break; | |
2697 | if (!ri) | |
2698 | continue; | |
2699 | ||
2700 | /* Create route in global routing table using this route entry's | |
2701 | * attribute. | |
2702 | */ | |
2703 | attr = ri->attr; | |
2704 | global_rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, | |
2705 | (struct prefix *)evp, &vpn->prd); | |
2706 | assert(global_rn); | |
2707 | update_evpn_route_entry(bgp, vpn, afi, safi, global_rn, attr, 1, | |
1a98c087 | 2708 | 0, &global_ri, 0); |
d62a17ae | 2709 | |
2710 | /* Schedule for processing and unlock node. */ | |
2711 | bgp_process(bgp, global_rn, afi, safi); | |
2712 | bgp_unlock_node(global_rn); | |
2713 | } | |
2714 | ||
2715 | return 0; | |
90e60aa7 | 2716 | } |
2717 | ||
2718 | /* | |
2719 | * Delete (and withdraw) local routes for a VNI - only from the global | |
2720 | * table. Invoked upon router-id change. | |
2721 | */ | |
d62a17ae | 2722 | static int delete_withdraw_vni_routes(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 2723 | { |
d62a17ae | 2724 | int ret; |
2725 | struct prefix_evpn p; | |
2726 | struct bgp_node *global_rn; | |
2727 | struct bgp_info *ri; | |
2728 | afi_t afi = AFI_L2VPN; | |
2729 | safi_t safi = SAFI_EVPN; | |
90e60aa7 | 2730 | |
d62a17ae | 2731 | /* Delete and withdraw locally learnt type-2 routes (MACIP) |
2732 | * for this VNI - from the global table. | |
2733 | */ | |
2734 | ret = delete_global_type2_routes(bgp, vpn); | |
2735 | if (ret) | |
2736 | return ret; | |
90e60aa7 | 2737 | |
d62a17ae | 2738 | /* Remove type-3 route for this VNI from global table. */ |
2739 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
2740 | global_rn = bgp_afi_node_lookup(bgp->rib[afi][safi], afi, safi, | |
2741 | (struct prefix *)&p, &vpn->prd); | |
2742 | if (global_rn) { | |
2743 | /* Delete route entry in the global EVPN table. */ | |
2744 | delete_evpn_route_entry(bgp, vpn, afi, safi, global_rn, &ri); | |
90e60aa7 | 2745 | |
d62a17ae | 2746 | /* Schedule for processing - withdraws to peers happen from |
2747 | * this table. | |
2748 | */ | |
2749 | if (ri) | |
2750 | bgp_process(bgp, global_rn, afi, safi); | |
2751 | bgp_unlock_node(global_rn); | |
2752 | } | |
90e60aa7 | 2753 | |
d62a17ae | 2754 | return 0; |
90e60aa7 | 2755 | } |
2756 | ||
2d48ee25 | 2757 | /* |
2758 | * Handle router-id change. Update and advertise local routes corresponding | |
2759 | * to this VNI from peers. Note that this is invoked after updating the | |
2760 | * router-id. The routes in the per-VNI table are used to create routes in | |
2761 | * the global table and schedule them. | |
2762 | */ | |
d62a17ae | 2763 | static void update_router_id_vni(struct hash_backet *backet, struct bgp *bgp) |
2d48ee25 | 2764 | { |
d62a17ae | 2765 | struct bgpevpn *vpn; |
2d48ee25 | 2766 | |
d62a17ae | 2767 | vpn = (struct bgpevpn *)backet->data; |
2d48ee25 | 2768 | |
d62a17ae | 2769 | if (!vpn) { |
2770 | zlog_warn("%s: VNI hash entry for VNI not found", __FUNCTION__); | |
2771 | return; | |
2772 | } | |
2d48ee25 | 2773 | |
d62a17ae | 2774 | /* Skip VNIs with configured RD. */ |
2775 | if (is_rd_configured(vpn)) | |
2776 | return; | |
2d48ee25 | 2777 | |
d62a17ae | 2778 | bgp_evpn_derive_auto_rd(bgp, vpn); |
2779 | update_advertise_vni_routes(bgp, vpn); | |
2d48ee25 | 2780 | } |
2781 | ||
2782 | /* | |
2783 | * Handle router-id change. Delete and withdraw local routes corresponding | |
2784 | * to this VNI from peers. Note that this is invoked prior to updating | |
2785 | * the router-id and is done only on the global route table, the routes | |
2786 | * are needed in the per-VNI table to re-advertise with new router id. | |
2787 | */ | |
d62a17ae | 2788 | static void withdraw_router_id_vni(struct hash_backet *backet, struct bgp *bgp) |
2d48ee25 | 2789 | { |
d62a17ae | 2790 | struct bgpevpn *vpn; |
2d48ee25 | 2791 | |
d62a17ae | 2792 | vpn = (struct bgpevpn *)backet->data; |
2d48ee25 | 2793 | |
d62a17ae | 2794 | if (!vpn) { |
2795 | zlog_warn("%s: VNI hash entry for VNI not found", __FUNCTION__); | |
2796 | return; | |
2797 | } | |
2d48ee25 | 2798 | |
d62a17ae | 2799 | /* Skip VNIs with configured RD. */ |
2800 | if (is_rd_configured(vpn)) | |
2801 | return; | |
2d48ee25 | 2802 | |
d62a17ae | 2803 | delete_withdraw_vni_routes(bgp, vpn); |
2d48ee25 | 2804 | } |
2805 | ||
128ea8ab | 2806 | /* |
2807 | * Process received EVPN type-2 route (advertise or withdraw). | |
2808 | */ | |
d62a17ae | 2809 | static int process_type2_route(struct peer *peer, afi_t afi, safi_t safi, |
2810 | struct attr *attr, u_char *pfx, int psize, | |
2811 | u_int32_t addpath_id) | |
2812 | { | |
2813 | struct prefix_rd prd; | |
2814 | struct prefix_evpn p; | |
2815 | u_char ipaddr_len; | |
2816 | u_char macaddr_len; | |
b57ba6d2 MK |
2817 | mpls_label_t label[BGP_MAX_LABELS]; /* holds the VNI(s) as in packet */ |
2818 | u_int32_t num_labels = 0; | |
d62a17ae | 2819 | int ret; |
2820 | ||
2821 | /* Type-2 route should be either 33, 37 or 49 bytes or an | |
2822 | * additional 3 bytes if there is a second label (VNI): | |
2823 | * RD (8), ESI (10), Eth Tag (4), MAC Addr Len (1), | |
2824 | * MAC Addr (6), IP len (1), IP (0, 4 or 16), | |
2825 | * MPLS Lbl1 (3), MPLS Lbl2 (0 or 3) | |
2826 | */ | |
2827 | if (psize != 33 && psize != 37 && psize != 49 && psize != 36 | |
2828 | && psize != 40 && psize != 52) { | |
2829 | zlog_err("%u:%s - Rx EVPN Type-2 NLRI with invalid length %d", | |
2830 | peer->bgp->vrf_id, peer->host, psize); | |
2831 | return -1; | |
2832 | } | |
2833 | ||
2834 | /* Make prefix_rd */ | |
2835 | prd.family = AF_UNSPEC; | |
2836 | prd.prefixlen = 64; | |
2837 | memcpy(&prd.val, pfx, 8); | |
2838 | pfx += 8; | |
2839 | ||
2840 | /* Make EVPN prefix. */ | |
2841 | memset(&p, 0, sizeof(struct prefix_evpn)); | |
b03b8898 | 2842 | p.family = AF_EVPN; |
d62a17ae | 2843 | p.prefixlen = EVPN_TYPE_2_ROUTE_PREFIXLEN; |
2844 | p.prefix.route_type = BGP_EVPN_MAC_IP_ROUTE; | |
2845 | ||
2846 | /* Skip over Ethernet Seg Identifier for now. */ | |
2847 | pfx += 10; | |
2848 | ||
2849 | /* Skip over Ethernet Tag for now. */ | |
2850 | pfx += 4; | |
2851 | ||
2852 | /* Get the MAC Addr len */ | |
2853 | macaddr_len = *pfx++; | |
2854 | ||
2855 | /* Get the MAC Addr */ | |
28328ea9 DS |
2856 | if (macaddr_len == (ETH_ALEN * 8)) { |
2857 | memcpy(&p.prefix.mac.octet, pfx, ETH_ALEN); | |
2858 | pfx += ETH_ALEN; | |
d62a17ae | 2859 | } else { |
2860 | zlog_err( | |
2861 | "%u:%s - Rx EVPN Type-2 NLRI with unsupported MAC address length %d", | |
2862 | peer->bgp->vrf_id, peer->host, macaddr_len); | |
2863 | return -1; | |
2864 | } | |
2865 | ||
2866 | ||
2867 | /* Get the IP. */ | |
2868 | ipaddr_len = *pfx++; | |
2869 | if (ipaddr_len != 0 && ipaddr_len != IPV4_MAX_BITLEN | |
2870 | && ipaddr_len != IPV6_MAX_BITLEN) { | |
2871 | zlog_err( | |
2872 | "%u:%s - Rx EVPN Type-2 NLRI with unsupported IP address length %d", | |
2873 | peer->bgp->vrf_id, peer->host, ipaddr_len); | |
2874 | return -1; | |
2875 | } | |
2876 | ||
2877 | if (ipaddr_len) { | |
2878 | ipaddr_len /= 8; /* Convert to bytes. */ | |
2879 | p.prefix.ip.ipa_type = (ipaddr_len == IPV4_MAX_BYTELEN) | |
2880 | ? IPADDR_V4 | |
2881 | : IPADDR_V6; | |
2882 | memcpy(&p.prefix.ip.ip.addr, pfx, ipaddr_len); | |
2883 | } | |
2884 | pfx += ipaddr_len; | |
2885 | ||
b57ba6d2 MK |
2886 | /* Get the VNI(s). Stored as bytes here. */ |
2887 | num_labels++; | |
2888 | memset(label, 0, sizeof(label)); | |
2889 | memcpy(&label[0], pfx, BGP_LABEL_BYTES); | |
1b817c78 | 2890 | pfx += BGP_LABEL_BYTES; |
b57ba6d2 MK |
2891 | psize -= (33 + ipaddr_len); |
2892 | /* Do we have a second VNI? */ | |
2893 | if (psize) { | |
2894 | num_labels++; | |
2895 | memcpy(&label[1], pfx, BGP_LABEL_BYTES); | |
6b11bd8d | 2896 | /* |
2897 | * If in future, we are required to access additional fields, | |
1b817c78 | 2898 | * we MUST increment pfx by BGP_LABEL_BYTES in before reading the next field |
6b11bd8d | 2899 | */ |
b57ba6d2 | 2900 | } |
d62a17ae | 2901 | |
2902 | /* Process the route. */ | |
2903 | if (attr) | |
2904 | ret = bgp_update(peer, (struct prefix *)&p, addpath_id, attr, | |
2905 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
b57ba6d2 | 2906 | &prd, &label[0], num_labels, 0, NULL); |
d62a17ae | 2907 | else |
2908 | ret = bgp_withdraw(peer, (struct prefix *)&p, addpath_id, attr, | |
2909 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
b57ba6d2 | 2910 | &prd, &label[0], num_labels, NULL); |
d62a17ae | 2911 | return ret; |
128ea8ab | 2912 | } |
2913 | ||
2914 | /* | |
2915 | * Process received EVPN type-3 route (advertise or withdraw). | |
2916 | */ | |
d62a17ae | 2917 | static int process_type3_route(struct peer *peer, afi_t afi, safi_t safi, |
2918 | struct attr *attr, u_char *pfx, int psize, | |
2919 | u_int32_t addpath_id) | |
2920 | { | |
2921 | struct prefix_rd prd; | |
2922 | struct prefix_evpn p; | |
2923 | u_char ipaddr_len; | |
2924 | int ret; | |
2925 | ||
2926 | /* Type-3 route should be either 17 or 29 bytes: RD (8), Eth Tag (4), | |
2927 | * IP len (1) and IP (4 or 16). | |
2928 | */ | |
2929 | if (psize != 17 && psize != 29) { | |
2930 | zlog_err("%u:%s - Rx EVPN Type-3 NLRI with invalid length %d", | |
2931 | peer->bgp->vrf_id, peer->host, psize); | |
2932 | return -1; | |
2933 | } | |
2934 | ||
2935 | /* Make prefix_rd */ | |
2936 | prd.family = AF_UNSPEC; | |
2937 | prd.prefixlen = 64; | |
2938 | memcpy(&prd.val, pfx, 8); | |
2939 | pfx += 8; | |
2940 | ||
2941 | /* Make EVPN prefix. */ | |
2942 | memset(&p, 0, sizeof(struct prefix_evpn)); | |
b03b8898 | 2943 | p.family = AF_EVPN; |
d62a17ae | 2944 | p.prefixlen = EVPN_TYPE_3_ROUTE_PREFIXLEN; |
2945 | p.prefix.route_type = BGP_EVPN_IMET_ROUTE; | |
2946 | ||
2947 | /* Skip over Ethernet Tag for now. */ | |
2948 | pfx += 4; | |
2949 | ||
2950 | /* Get the IP. */ | |
2951 | ipaddr_len = *pfx++; | |
2952 | if (ipaddr_len == IPV4_MAX_BITLEN) { | |
2953 | p.prefix.ip.ipa_type = IPADDR_V4; | |
2954 | memcpy(&p.prefix.ip.ip.addr, pfx, IPV4_MAX_BYTELEN); | |
2955 | } else { | |
2956 | zlog_err( | |
2957 | "%u:%s - Rx EVPN Type-3 NLRI with unsupported IP address length %d", | |
2958 | peer->bgp->vrf_id, peer->host, ipaddr_len); | |
2959 | return -1; | |
2960 | } | |
2961 | ||
2962 | /* Process the route. */ | |
2963 | if (attr) | |
2964 | ret = bgp_update(peer, (struct prefix *)&p, addpath_id, attr, | |
2965 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
b57ba6d2 | 2966 | &prd, NULL, 0, 0, NULL); |
d62a17ae | 2967 | else |
2968 | ret = bgp_withdraw(peer, (struct prefix *)&p, addpath_id, attr, | |
2969 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
b57ba6d2 | 2970 | &prd, NULL, 0, NULL); |
d62a17ae | 2971 | return ret; |
128ea8ab | 2972 | } |
2973 | ||
2974 | /* | |
2975 | * Process received EVPN type-5 route (advertise or withdraw). | |
2976 | */ | |
d62a17ae | 2977 | static int process_type5_route(struct peer *peer, afi_t afi, safi_t safi, |
2978 | struct attr *attr, u_char *pfx, int psize, | |
2979 | u_int32_t addpath_id, int withdraw) | |
2980 | { | |
2981 | struct prefix_rd prd; | |
2982 | struct prefix_evpn p; | |
2983 | struct bgp_route_evpn evpn; | |
2984 | u_char ippfx_len; | |
2985 | u_int32_t eth_tag; | |
b57ba6d2 | 2986 | mpls_label_t label; /* holds the VNI as in the packet */ |
d62a17ae | 2987 | int ret; |
2988 | ||
2989 | /* Type-5 route should be 34 or 58 bytes: | |
2990 | * RD (8), ESI (10), Eth Tag (4), IP len (1), IP (4 or 16), | |
2991 | * GW (4 or 16) and VNI (3). | |
2992 | * Note that the IP and GW should both be IPv4 or both IPv6. | |
2993 | */ | |
2994 | if (psize != 34 && psize != 58) { | |
2995 | zlog_err("%u:%s - Rx EVPN Type-5 NLRI with invalid length %d", | |
2996 | peer->bgp->vrf_id, peer->host, psize); | |
2997 | return -1; | |
2998 | } | |
2999 | ||
3000 | /* Make prefix_rd */ | |
3001 | prd.family = AF_UNSPEC; | |
3002 | prd.prefixlen = 64; | |
3003 | memcpy(&prd.val, pfx, 8); | |
3004 | pfx += 8; | |
3005 | ||
3006 | /* Make EVPN prefix. */ | |
3007 | memset(&p, 0, sizeof(struct prefix_evpn)); | |
b03b8898 | 3008 | p.family = AF_EVPN; |
e9fc2840 | 3009 | p.prefixlen = EVPN_TYPE_5_ROUTE_PREFIXLEN; |
d62a17ae | 3010 | p.prefix.route_type = BGP_EVPN_IP_PREFIX_ROUTE; |
3011 | ||
3012 | /* Additional information outside of prefix - ESI and GW IP */ | |
3013 | memset(&evpn, 0, sizeof(evpn)); | |
3014 | ||
3015 | /* Fetch ESI */ | |
3016 | memcpy(&evpn.eth_s_id.val, pfx, 10); | |
3017 | pfx += 10; | |
3018 | ||
3019 | /* Fetch Ethernet Tag. */ | |
3020 | memcpy(ð_tag, pfx, 4); | |
3021 | p.prefix.eth_tag = ntohl(eth_tag); | |
3022 | pfx += 4; | |
3023 | ||
3024 | /* Fetch IP prefix length. */ | |
3025 | ippfx_len = *pfx++; | |
3026 | if (ippfx_len > IPV6_MAX_BITLEN) { | |
3027 | zlog_err( | |
3028 | "%u:%s - Rx EVPN Type-5 NLRI with invalid IP Prefix length %d", | |
3029 | peer->bgp->vrf_id, peer->host, ippfx_len); | |
3030 | return -1; | |
3031 | } | |
3032 | p.prefix.ip_prefix_length = ippfx_len; | |
3033 | ||
3034 | /* Determine IPv4 or IPv6 prefix */ | |
3035 | /* Since the address and GW are from the same family, this just becomes | |
3036 | * a simple check on the total size. | |
3037 | */ | |
3038 | if (psize == 34) { | |
3039 | SET_IPADDR_V4(&p.prefix.ip); | |
3040 | memcpy(&p.prefix.ip.ipaddr_v4, pfx, 4); | |
3041 | pfx += 4; | |
3042 | memcpy(&evpn.gw_ip.ipv4, pfx, 4); | |
3043 | pfx += 4; | |
d62a17ae | 3044 | } else { |
3045 | SET_IPADDR_V6(&p.prefix.ip); | |
3046 | memcpy(&p.prefix.ip.ipaddr_v6, pfx, 16); | |
3047 | pfx += 16; | |
3048 | memcpy(&evpn.gw_ip.ipv6, pfx, 16); | |
3049 | pfx += 16; | |
d62a17ae | 3050 | } |
3051 | ||
b57ba6d2 MK |
3052 | /* Get the VNI (in MPLS label field). Stored as bytes here. */ |
3053 | memset(&label, 0, sizeof(label)); | |
3054 | memcpy(&label, pfx, BGP_LABEL_BYTES); | |
6b11bd8d | 3055 | |
3056 | /* | |
3057 | * If in future, we are required to access additional fields, | |
1b817c78 | 3058 | * we MUST increment pfx by BGP_LABEL_BYTES in before reading the next field |
6b11bd8d | 3059 | */ |
d62a17ae | 3060 | |
3061 | /* Process the route. */ | |
3062 | if (!withdraw) | |
3063 | ret = bgp_update(peer, (struct prefix *)&p, addpath_id, attr, | |
3064 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
b57ba6d2 | 3065 | &prd, &label, 1, 0, &evpn); |
d62a17ae | 3066 | else |
3067 | ret = bgp_withdraw(peer, (struct prefix *)&p, addpath_id, attr, | |
3068 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
b57ba6d2 | 3069 | &prd, &label, 1, &evpn); |
d62a17ae | 3070 | |
3071 | return ret; | |
3072 | } | |
3073 | ||
3074 | static void evpn_mpattr_encode_type5(struct stream *s, struct prefix *p, | |
b57ba6d2 MK |
3075 | struct prefix_rd *prd, |
3076 | mpls_label_t *label, u_int32_t num_labels, | |
d62a17ae | 3077 | struct attr *attr) |
3078 | { | |
3079 | int len; | |
3080 | char temp[16]; | |
3081 | struct evpn_addr *p_evpn_p; | |
3082 | ||
3083 | memset(&temp, 0, 16); | |
b03b8898 | 3084 | if (p->family != AF_EVPN) |
d62a17ae | 3085 | return; |
3086 | p_evpn_p = &(p->u.prefix_evpn); | |
3087 | ||
e9fc2840 | 3088 | /* len denites the total len of IP and GW-IP in the route |
523cafc4 | 3089 | IP and GW-IP have to be both ipv4 or ipv6 |
3090 | */ | |
d62a17ae | 3091 | if (IS_IPADDR_V4(&p_evpn_p->ip)) |
e9fc2840 | 3092 | len = 8; /* IP and GWIP are both ipv4 */ |
d62a17ae | 3093 | else |
e9fc2840 | 3094 | len = 32; /* IP and GWIP are both ipv6 */ |
d62a17ae | 3095 | /* Prefix contains RD, ESI, EthTag, IP length, IP, GWIP and VNI */ |
3096 | stream_putc(s, 8 + 10 + 4 + 1 + len + 3); | |
3097 | stream_put(s, prd->val, 8); | |
0af35d90 | 3098 | if (attr) |
d62a17ae | 3099 | stream_put(s, &(attr->evpn_overlay.eth_s_id), 10); |
3100 | else | |
3101 | stream_put(s, &temp, 10); | |
3102 | stream_putl(s, p_evpn_p->eth_tag); | |
3103 | stream_putc(s, p_evpn_p->ip_prefix_length); | |
3104 | if (IS_IPADDR_V4(&p_evpn_p->ip)) | |
3105 | stream_put_ipv4(s, p_evpn_p->ip.ipaddr_v4.s_addr); | |
3106 | else | |
3107 | stream_put(s, &p_evpn_p->ip.ipaddr_v6, 16); | |
0af35d90 | 3108 | if (attr) { |
d62a17ae | 3109 | if (IS_IPADDR_V4(&p_evpn_p->ip)) |
3110 | stream_put_ipv4(s, | |
3111 | attr->evpn_overlay.gw_ip.ipv4.s_addr); | |
3112 | else | |
3113 | stream_put(s, &(attr->evpn_overlay.gw_ip.ipv6), 16); | |
3114 | } else { | |
3115 | if (IS_IPADDR_V4(&p_evpn_p->ip)) | |
3116 | stream_put_ipv4(s, 0); | |
3117 | else | |
3118 | stream_put(s, &temp, 16); | |
3119 | } | |
3120 | ||
b57ba6d2 | 3121 | if (num_labels) |
d62a17ae | 3122 | stream_put(s, label, 3); |
3123 | else | |
3124 | stream_put3(s, 0); | |
128ea8ab | 3125 | } |
3126 | ||
3127 | /* | |
3128 | * Cleanup specific VNI upon EVPN (advertise-all-vni) being disabled. | |
3129 | */ | |
d62a17ae | 3130 | static void cleanup_vni_on_disable(struct hash_backet *backet, struct bgp *bgp) |
128ea8ab | 3131 | { |
d62a17ae | 3132 | struct bgpevpn *vpn = (struct bgpevpn *)backet->data; |
128ea8ab | 3133 | |
d62a17ae | 3134 | /* Remove EVPN routes and schedule for processing. */ |
3135 | delete_routes_for_vni(bgp, vpn); | |
128ea8ab | 3136 | |
d62a17ae | 3137 | /* Clear "live" flag and see if hash needs to be freed. */ |
3138 | UNSET_FLAG(vpn->flags, VNI_FLAG_LIVE); | |
3139 | if (!is_vni_configured(vpn)) | |
3140 | bgp_evpn_free(bgp, vpn); | |
128ea8ab | 3141 | } |
3142 | ||
3143 | /* | |
3144 | * Free a VNI entry; iterator function called during cleanup. | |
3145 | */ | |
d62a17ae | 3146 | static void free_vni_entry(struct hash_backet *backet, struct bgp *bgp) |
128ea8ab | 3147 | { |
d62a17ae | 3148 | struct bgpevpn *vpn; |
128ea8ab | 3149 | |
d62a17ae | 3150 | vpn = (struct bgpevpn *)backet->data; |
3151 | delete_all_vni_routes(bgp, vpn); | |
3152 | bgp_evpn_free(bgp, vpn); | |
128ea8ab | 3153 | } |
3154 | ||
c581d8b0 MK |
3155 | /* |
3156 | * Derive AUTO import RT for BGP VRF - L3VNI | |
3157 | */ | |
3158 | static void evpn_auto_rt_import_add_for_vrf(struct bgp *bgp_vrf) | |
3159 | { | |
10ebe1ab MK |
3160 | struct bgp *bgp_def = NULL; |
3161 | ||
c581d8b0 | 3162 | form_auto_rt(bgp_vrf, bgp_vrf->l3vni, bgp_vrf->vrf_import_rtl); |
10ebe1ab MK |
3163 | UNSET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_IMPORT_RT_CFGD); |
3164 | ||
3165 | /* Map RT to VRF */ | |
3166 | bgp_def = bgp_get_default(); | |
3167 | if (!bgp_def) | |
3168 | return; | |
3169 | bgp_evpn_map_vrf_to_its_rts(bgp_vrf); | |
c581d8b0 MK |
3170 | } |
3171 | ||
3172 | /* | |
3173 | * Delete AUTO import RT from BGP VRF - L3VNI | |
3174 | */ | |
3175 | static void evpn_auto_rt_import_delete_for_vrf(struct bgp *bgp_vrf) | |
3176 | { | |
3177 | evpn_rt_delete_auto(bgp_vrf, bgp_vrf->l3vni, bgp_vrf->vrf_import_rtl); | |
3178 | } | |
3179 | ||
3180 | /* | |
3181 | * Derive AUTO export RT for BGP VRF - L3VNI | |
3182 | */ | |
3183 | static void evpn_auto_rt_export_add_for_vrf(struct bgp *bgp_vrf) | |
3184 | { | |
3185 | UNSET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_EXPORT_RT_CFGD); | |
3186 | form_auto_rt(bgp_vrf, bgp_vrf->l3vni, bgp_vrf->vrf_export_rtl); | |
3187 | } | |
3188 | ||
3189 | /* | |
3190 | * Delete AUTO export RT from BGP VRF - L3VNI | |
3191 | */ | |
3192 | static void evpn_auto_rt_export_delete_for_vrf(struct bgp *bgp_vrf) | |
3193 | { | |
3194 | evpn_rt_delete_auto(bgp_vrf, bgp_vrf->l3vni, bgp_vrf->vrf_export_rtl); | |
3195 | } | |
128ea8ab | 3196 | |
f1f8b53c MK |
3197 | static void bgp_evpn_handle_export_rt_change_for_vrf(struct bgp *bgp_vrf) |
3198 | { | |
3199 | struct bgp *bgp_def = NULL; | |
3200 | struct listnode *node = NULL; | |
3201 | struct bgpevpn *vpn = NULL; | |
3202 | ||
3203 | bgp_def = bgp_get_default(); | |
3204 | if (!bgp_def) | |
3205 | return; | |
3206 | ||
4992b4ae MK |
3207 | /* update all type-5 routes */ |
3208 | update_advertise_vrf_routes(bgp_vrf); | |
3209 | ||
3210 | /* update all type-2 routes */ | |
f1f8b53c MK |
3211 | for (ALL_LIST_ELEMENTS_RO(bgp_vrf->l2vnis, node, vpn)) |
3212 | update_routes_for_vni(bgp_def, vpn); | |
3213 | } | |
3214 | ||
128ea8ab | 3215 | /* |
3216 | * Public functions. | |
3217 | */ | |
3218 | ||
5424b7ba | 3219 | /* withdraw type-5 route corresponding to ip prefix */ |
31310b25 | 3220 | void bgp_evpn_withdraw_type5_route(struct bgp *bgp_vrf, struct prefix *p, |
5424b7ba MK |
3221 | afi_t afi, safi_t safi) |
3222 | { | |
3223 | int ret = 0; | |
3224 | struct prefix_evpn evp; | |
3225 | char buf[PREFIX_STRLEN]; | |
3226 | ||
faafdfa8 | 3227 | /* NOTE: Check needed as this is called per-route also. */ |
3228 | if (!advertise_type5_routes(bgp_vrf, afi)) | |
3229 | return; | |
3230 | ||
31310b25 | 3231 | build_type5_prefix_from_ip_prefix(&evp, p); |
5424b7ba MK |
3232 | ret = delete_evpn_type5_route(bgp_vrf, &evp); |
3233 | if (ret) { | |
3234 | zlog_err( | |
3235 | "%u failed to delete type-5 route for prefix %s in vrf %s", | |
3236 | bgp_vrf->vrf_id, | |
31310b25 | 3237 | prefix2str(p, buf, sizeof(buf)), |
5424b7ba MK |
3238 | vrf_id_to_name(bgp_vrf->vrf_id)); |
3239 | } | |
3240 | } | |
3241 | ||
342dd0c6 | 3242 | /* withdraw all type-5 routes for an address family */ |
3243 | void bgp_evpn_withdraw_type5_routes(struct bgp *bgp_vrf, | |
053905d2 | 3244 | afi_t afi, safi_t safi) |
342dd0c6 | 3245 | { |
3246 | struct bgp_table *table = NULL; | |
3247 | struct bgp_node *rn = NULL; | |
3248 | ||
faafdfa8 | 3249 | /* Bail out early if we don't have to advertise type-5 routes. */ |
06d2e8f3 MK |
3250 | if (!advertise_type5_routes(bgp_vrf, afi)) |
3251 | return; | |
3252 | ||
053905d2 | 3253 | table = bgp_vrf->rib[afi][safi]; |
5424b7ba | 3254 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) |
31310b25 | 3255 | bgp_evpn_withdraw_type5_route(bgp_vrf, &rn->p, afi, safi); |
342dd0c6 | 3256 | |
5424b7ba | 3257 | } |
342dd0c6 | 3258 | |
2f69f6d3 | 3259 | /* |
3260 | * Advertise IP prefix as type-5 route. The afi/safi and src_attr passed | |
3261 | * to this function correspond to those of the source IP prefix (best | |
3262 | * path in the case of the attr. In the case of a local prefix (when we | |
3263 | * are advertising local subnets), the src_attr will be NULL. | |
3264 | */ | |
31310b25 | 3265 | void bgp_evpn_advertise_type5_route(struct bgp *bgp_vrf, struct prefix *p, |
2f69f6d3 | 3266 | struct attr *src_attr, |
5424b7ba MK |
3267 | afi_t afi, safi_t safi) |
3268 | { | |
3269 | int ret = 0; | |
3270 | struct prefix_evpn evp; | |
3271 | char buf[PREFIX_STRLEN]; | |
3272 | ||
faafdfa8 | 3273 | /* NOTE: Check needed as this is called per-route also. */ |
5424b7ba MK |
3274 | if (!advertise_type5_routes(bgp_vrf, afi)) |
3275 | return; | |
3276 | ||
5424b7ba | 3277 | /* only advertise subnet routes as type-5 */ |
31310b25 | 3278 | if (is_host_route(p)) |
5424b7ba MK |
3279 | return; |
3280 | ||
31310b25 | 3281 | build_type5_prefix_from_ip_prefix(&evp, p); |
2f69f6d3 | 3282 | ret = update_evpn_type5_route(bgp_vrf, &evp, src_attr); |
3283 | if (ret) | |
5424b7ba | 3284 | zlog_err( |
2f69f6d3 | 3285 | "%u: Failed to create type-5 route for prefix %s", |
5424b7ba | 3286 | bgp_vrf->vrf_id, |
2f69f6d3 | 3287 | prefix2str(p, buf, sizeof(buf))); |
342dd0c6 | 3288 | } |
3289 | ||
2f69f6d3 | 3290 | /* Inject all prefixes of a particular address-family (currently, IPv4 or |
3291 | * IPv6 unicast) into EVPN as type-5 routes. This is invoked when the | |
3292 | * advertisement is enabled. | |
3293 | */ | |
342dd0c6 | 3294 | void bgp_evpn_advertise_type5_routes(struct bgp *bgp_vrf, |
053905d2 | 3295 | afi_t afi, safi_t safi) |
342dd0c6 | 3296 | { |
3297 | struct bgp_table *table = NULL; | |
3298 | struct bgp_node *rn = NULL; | |
2f69f6d3 | 3299 | struct bgp_info *ri; |
342dd0c6 | 3300 | |
faafdfa8 | 3301 | /* Bail out early if we don't have to advertise type-5 routes. */ |
3302 | if (!advertise_type5_routes(bgp_vrf, afi)) | |
3303 | return; | |
342dd0c6 | 3304 | |
053905d2 | 3305 | table = bgp_vrf->rib[afi][safi]; |
31310b25 | 3306 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) { |
2f69f6d3 | 3307 | /* Need to identify the "selected" route entry to use its |
3308 | * attribute. | |
3309 | * TODO: Support for AddPath for EVPN. | |
3310 | */ | |
3311 | for (ri = rn->info; ri; ri = ri->next) { | |
3312 | if (CHECK_FLAG(ri->flags, BGP_INFO_SELECTED)) { | |
53c84f78 MK |
3313 | |
3314 | /* apply the route-map */ | |
3315 | if (bgp_vrf->adv_cmd_rmap[afi][safi].map) { | |
3316 | int ret = 0; | |
3317 | ||
3318 | ret = | |
3319 | route_map_apply( | |
3320 | bgp_vrf->adv_cmd_rmap[afi][safi].map, | |
3321 | &rn->p, RMAP_BGP, ri); | |
3322 | if (ret == RMAP_DENYMATCH) | |
3323 | continue; | |
3324 | } | |
3325 | ||
2f69f6d3 | 3326 | bgp_evpn_advertise_type5_route(bgp_vrf, &rn->p, |
3327 | ri->attr, | |
3328 | afi, safi); | |
3329 | break; | |
3330 | } | |
3331 | } | |
31310b25 | 3332 | } |
342dd0c6 | 3333 | } |
3334 | ||
c581d8b0 MK |
3335 | void evpn_rt_delete_auto(struct bgp *bgp, vni_t vni, |
3336 | struct list *rtl) | |
3337 | { | |
3338 | struct listnode *node, *nnode, *node_to_del; | |
3339 | struct ecommunity *ecom, *ecom_auto; | |
3340 | struct ecommunity_val eval; | |
3341 | ||
3342 | encode_route_target_as((bgp->as & 0xFFFF), vni, &eval); | |
3343 | ||
3344 | ecom_auto = ecommunity_new(); | |
3345 | ecommunity_add_val(ecom_auto, &eval); | |
3346 | node_to_del = NULL; | |
3347 | ||
3348 | for (ALL_LIST_ELEMENTS(rtl, node, nnode, ecom)) { | |
3349 | if (ecommunity_match(ecom, ecom_auto)) { | |
3350 | ecommunity_free(&ecom); | |
3351 | node_to_del = node; | |
3352 | } | |
3353 | } | |
3354 | ||
3355 | if (node_to_del) | |
3356 | list_delete_node(rtl, node_to_del); | |
3357 | ||
3358 | ecommunity_free(&ecom_auto); | |
3359 | } | |
3360 | ||
3361 | void bgp_evpn_configure_import_rt_for_vrf(struct bgp *bgp_vrf, | |
10ebe1ab | 3362 | struct ecommunity *ecomadd) |
c581d8b0 | 3363 | { |
5ba238b7 MK |
3364 | /* uninstall routes from vrf */ |
3365 | uninstall_routes_for_vrf(bgp_vrf); | |
10ebe1ab MK |
3366 | |
3367 | /* Cleanup the RT to VRF mapping */ | |
3368 | bgp_evpn_unmap_vrf_from_its_rts(bgp_vrf); | |
3369 | ||
c581d8b0 MK |
3370 | /* Remove auto generated RT */ |
3371 | evpn_auto_rt_import_delete_for_vrf(bgp_vrf); | |
3372 | ||
3373 | /* Add the newly configured RT to RT list */ | |
3374 | listnode_add_sort(bgp_vrf->vrf_import_rtl, ecomadd); | |
3375 | SET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_IMPORT_RT_CFGD); | |
3376 | ||
10ebe1ab MK |
3377 | /* map VRF to its RTs */ |
3378 | bgp_evpn_map_vrf_to_its_rts(bgp_vrf); | |
3379 | ||
5ba238b7 MK |
3380 | /* install routes matching the new VRF */ |
3381 | install_routes_for_vrf(bgp_vrf); | |
c581d8b0 MK |
3382 | } |
3383 | ||
3384 | void bgp_evpn_unconfigure_import_rt_for_vrf(struct bgp *bgp_vrf, | |
3385 | struct ecommunity *ecomdel) | |
3386 | { | |
3387 | struct listnode *node = NULL, *nnode = NULL, *node_to_del = NULL; | |
3388 | struct ecommunity *ecom = NULL; | |
3389 | ||
5ba238b7 MK |
3390 | /* uninstall routes from vrf */ |
3391 | uninstall_routes_for_vrf(bgp_vrf); | |
10ebe1ab MK |
3392 | |
3393 | /* Cleanup the RT to VRF mapping */ | |
3394 | bgp_evpn_unmap_vrf_from_its_rts(bgp_vrf); | |
3395 | ||
c581d8b0 MK |
3396 | /* remove the RT from the RT list */ |
3397 | for (ALL_LIST_ELEMENTS(bgp_vrf->vrf_import_rtl, node, nnode, ecom)) { | |
3398 | if (ecommunity_match(ecom, ecomdel)) { | |
3399 | ecommunity_free(&ecom); | |
3400 | node_to_del = node; | |
3401 | break; | |
3402 | } | |
3403 | } | |
3404 | ||
3405 | if (node_to_del) | |
3406 | list_delete_node(bgp_vrf->vrf_import_rtl, node_to_del); | |
3407 | ||
3408 | /* fallback to auto import rt, if this was the last RT */ | |
3409 | if (list_isempty(bgp_vrf->vrf_import_rtl)) { | |
3410 | UNSET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_IMPORT_RT_CFGD); | |
3411 | evpn_auto_rt_import_add_for_vrf(bgp_vrf); | |
3412 | } | |
3413 | ||
10ebe1ab MK |
3414 | /* map VRFs to its RTs */ |
3415 | bgp_evpn_map_vrf_to_its_rts(bgp_vrf); | |
3416 | ||
5ba238b7 MK |
3417 | /* install routes matching this new RT */ |
3418 | install_routes_for_vrf(bgp_vrf); | |
c581d8b0 MK |
3419 | } |
3420 | ||
3421 | void bgp_evpn_configure_export_rt_for_vrf(struct bgp *bgp_vrf, | |
3422 | struct ecommunity *ecomadd) | |
3423 | { | |
3424 | /* remove auto-generated RT */ | |
3425 | evpn_auto_rt_export_delete_for_vrf(bgp_vrf); | |
3426 | ||
3427 | /* Add the new RT to the RT list */ | |
3428 | listnode_add_sort(bgp_vrf->vrf_export_rtl, ecomadd); | |
3429 | SET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_EXPORT_RT_CFGD); | |
3430 | ||
f1f8b53c MK |
3431 | bgp_evpn_handle_export_rt_change_for_vrf(bgp_vrf); |
3432 | ||
c581d8b0 MK |
3433 | } |
3434 | ||
3435 | void bgp_evpn_unconfigure_export_rt_for_vrf(struct bgp *bgp_vrf, | |
3436 | struct ecommunity *ecomdel) | |
3437 | { | |
3438 | struct listnode *node = NULL, *nnode = NULL, *node_to_del = NULL; | |
3439 | struct ecommunity *ecom = NULL; | |
3440 | ||
3441 | /* Remove the RT from the RT list */ | |
3442 | for (ALL_LIST_ELEMENTS(bgp_vrf->vrf_export_rtl, node, nnode, ecom)) { | |
3443 | if (ecommunity_match(ecom, ecomdel)) { | |
3444 | ecommunity_free(&ecom); | |
3445 | node_to_del = node; | |
3446 | break; | |
3447 | } | |
3448 | } | |
3449 | ||
3450 | if (node_to_del) | |
3451 | list_delete_node(bgp_vrf->vrf_export_rtl, node_to_del); | |
3452 | ||
3453 | /* fall back to auto-generated RT if this was the last RT */ | |
877702e7 | 3454 | if (bgp_vrf->vrf_export_rtl && list_isempty(bgp_vrf->vrf_export_rtl)) { |
c581d8b0 MK |
3455 | UNSET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_EXPORT_RT_CFGD); |
3456 | evpn_auto_rt_export_add_for_vrf(bgp_vrf); | |
3457 | } | |
3458 | ||
f1f8b53c | 3459 | bgp_evpn_handle_export_rt_change_for_vrf(bgp_vrf); |
c581d8b0 MK |
3460 | } |
3461 | ||
2d48ee25 | 3462 | /* |
3463 | * Handle change to BGP router id. This is invoked twice by the change | |
3464 | * handler, first before the router id has been changed and then after | |
3465 | * the router id has been changed. The first invocation will result in | |
676f83b9 | 3466 | * local routes for all VNIs/VRF being deleted and withdrawn and the next |
2d48ee25 | 3467 | * will result in the routes being re-advertised. |
3468 | */ | |
d62a17ae | 3469 | void bgp_evpn_handle_router_id_update(struct bgp *bgp, int withdraw) |
2d48ee25 | 3470 | { |
676f83b9 | 3471 | if (withdraw) { |
3472 | ||
3473 | /* delete and withdraw all the type-5 routes | |
523cafc4 | 3474 | stored in the global table for this vrf |
3475 | */ | |
80b140af | 3476 | withdraw_router_id_vrf(bgp); |
676f83b9 | 3477 | |
3478 | /* delete all the VNI routes (type-2/type-3) routes for all the | |
523cafc4 | 3479 | * L2-VNIs |
3480 | */ | |
d62a17ae | 3481 | hash_iterate(bgp->vnihash, |
3482 | (void (*)(struct hash_backet *, | |
3483 | void *))withdraw_router_id_vni, | |
3484 | bgp); | |
676f83b9 | 3485 | } else { |
3486 | ||
3487 | /* advertise all routes in the vrf as type-5 routes with the new | |
523cafc4 | 3488 | * RD |
3489 | */ | |
80b140af | 3490 | update_router_id_vrf(bgp); |
676f83b9 | 3491 | |
3492 | /* advertise all the VNI routes (type-2/type-3) routes with the | |
523cafc4 | 3493 | * new RD |
3494 | */ | |
d62a17ae | 3495 | hash_iterate(bgp->vnihash, |
3496 | (void (*)(struct hash_backet *, | |
3497 | void *))update_router_id_vni, | |
3498 | bgp); | |
676f83b9 | 3499 | } |
2d48ee25 | 3500 | } |
3501 | ||
90e60aa7 | 3502 | /* |
3503 | * Handle change to export RT - update and advertise local routes. | |
3504 | */ | |
d62a17ae | 3505 | int bgp_evpn_handle_export_rt_change(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 3506 | { |
d62a17ae | 3507 | return update_routes_for_vni(bgp, vpn); |
90e60aa7 | 3508 | } |
3509 | ||
676f83b9 | 3510 | void bgp_evpn_handle_vrf_rd_change(struct bgp *bgp_vrf, |
3511 | int withdraw) | |
3512 | { | |
3513 | if (withdraw) | |
3514 | delete_withdraw_vrf_routes(bgp_vrf); | |
3515 | else | |
3516 | update_advertise_vrf_routes(bgp_vrf); | |
3517 | } | |
3518 | ||
90e60aa7 | 3519 | /* |
3520 | * Handle change to RD. This is invoked twice by the change handler, | |
3521 | * first before the RD has been changed and then after the RD has | |
3522 | * been changed. The first invocation will result in local routes | |
3523 | * of this VNI being deleted and withdrawn and the next will result | |
3524 | * in the routes being re-advertised. | |
3525 | */ | |
d62a17ae | 3526 | void bgp_evpn_handle_rd_change(struct bgp *bgp, struct bgpevpn *vpn, |
3527 | int withdraw) | |
90e60aa7 | 3528 | { |
d62a17ae | 3529 | if (withdraw) |
3530 | delete_withdraw_vni_routes(bgp, vpn); | |
3531 | else | |
3532 | update_advertise_vni_routes(bgp, vpn); | |
90e60aa7 | 3533 | } |
3534 | ||
3535 | /* | |
3536 | * Install routes for this VNI. Invoked upon change to Import RT. | |
3537 | */ | |
d62a17ae | 3538 | int bgp_evpn_install_routes(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 3539 | { |
d62a17ae | 3540 | return install_routes_for_vni(bgp, vpn); |
90e60aa7 | 3541 | } |
3542 | ||
3543 | /* | |
3544 | * Uninstall all routes installed for this VNI. Invoked upon change | |
3545 | * to Import RT. | |
3546 | */ | |
d62a17ae | 3547 | int bgp_evpn_uninstall_routes(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 3548 | { |
d62a17ae | 3549 | return uninstall_routes_for_vni(bgp, vpn); |
90e60aa7 | 3550 | } |
3551 | ||
b16031a2 | 3552 | /* |
b57ba6d2 | 3553 | * TODO: Hardcoded for a maximum of 2 VNIs right now |
b16031a2 | 3554 | */ |
b57ba6d2 MK |
3555 | char *bgp_evpn_label2str(mpls_label_t *label, u_int32_t num_labels, |
3556 | char *buf, int len) | |
b16031a2 | 3557 | { |
b57ba6d2 | 3558 | vni_t vni1, vni2; |
b16031a2 | 3559 | |
b57ba6d2 MK |
3560 | vni1 = label2vni(label); |
3561 | if (num_labels == 2) { | |
3562 | vni2 = label2vni(label+1); | |
3563 | snprintf(buf, len, "%u/%u", vni1, vni2); | |
3564 | } else | |
3565 | snprintf(buf, len, "%u", vni1); | |
d62a17ae | 3566 | return buf; |
b16031a2 | 3567 | } |
3568 | ||
9c92b5f7 MK |
3569 | /* |
3570 | * Function to convert evpn route to json format. | |
3571 | * NOTE: We don't use prefix2str as the output here is a bit different. | |
3572 | */ | |
57f7feb6 | 3573 | void bgp_evpn_route2json(struct prefix_evpn *p, json_object *json) |
9c92b5f7 | 3574 | { |
b682f6de | 3575 | char buf1[ETHER_ADDR_STRLEN]; |
3576 | char buf2[PREFIX2STR_BUFFER]; | |
9c92b5f7 | 3577 | |
b682f6de | 3578 | if (!json) |
3579 | return; | |
9c92b5f7 | 3580 | |
dff8f48d | 3581 | if (p->prefix.route_type == BGP_EVPN_IMET_ROUTE) { |
b682f6de | 3582 | json_object_int_add(json, "routeType", p->prefix.route_type); |
3583 | json_object_int_add(json, "ethTag", 0); | |
57f7feb6 MK |
3584 | json_object_int_add(json, "ipLen", |
3585 | IS_EVPN_PREFIX_IPADDR_V4(p) | |
3586 | ? IPV4_MAX_BITLEN | |
3587 | : IPV6_MAX_BITLEN); | |
b682f6de | 3588 | json_object_string_add(json, "ip", |
57f7feb6 MK |
3589 | inet_ntoa(p->prefix.ip.ipaddr_v4)); |
3590 | } else if (p->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) { | |
dff8f48d | 3591 | if (IS_EVPN_PREFIX_IPADDR_NONE(p)) { |
57f7feb6 MK |
3592 | json_object_int_add(json, "routeType", |
3593 | p->prefix.route_type); | |
3594 | json_object_int_add( | |
3595 | json, "esi", | |
3596 | 0); /* TODO: we don't support esi yet */ | |
3597 | json_object_int_add(json, "ethTag", 0); | |
3598 | json_object_int_add(json, "macLen", 8 * ETH_ALEN); | |
3599 | json_object_string_add(json, "mac", | |
3600 | prefix_mac2str(&p->prefix.mac, | |
3601 | buf1, | |
3602 | sizeof(buf1))); | |
dff8f48d MK |
3603 | } else { |
3604 | u_char family; | |
3605 | ||
57f7feb6 MK |
3606 | family = IS_EVPN_PREFIX_IPADDR_V4(p) ? AF_INET |
3607 | : AF_INET6; | |
dff8f48d | 3608 | |
b682f6de | 3609 | json_object_int_add(json, "routeType", |
57f7feb6 MK |
3610 | p->prefix.route_type); |
3611 | json_object_int_add( | |
3612 | json, "esi", | |
3613 | 0); /* TODO: we don't support esi yet */ | |
b682f6de | 3614 | json_object_int_add(json, "ethTag", 0); |
57f7feb6 | 3615 | json_object_int_add(json, "macLen", 8 * ETH_ALEN); |
b682f6de | 3616 | json_object_string_add(json, "mac", |
57f7feb6 MK |
3617 | prefix_mac2str(&p->prefix.mac, |
3618 | buf1, | |
3619 | sizeof(buf1))); | |
b682f6de | 3620 | json_object_int_add(json, "ipLen", |
57f7feb6 MK |
3621 | IS_EVPN_PREFIX_IPADDR_V4(p) |
3622 | ? IPV4_MAX_BITLEN | |
3623 | : IPV6_MAX_BITLEN); | |
3624 | json_object_string_add( | |
3625 | json, "ip", | |
3626 | inet_ntop(family, &p->prefix.ip.ip.addr, buf2, | |
3627 | PREFIX2STR_BUFFER)); | |
dff8f48d MK |
3628 | } |
3629 | } else { | |
3630 | /* Currently, this is to cater to other AF_ETHERNET code. */ | |
3631 | } | |
9c92b5f7 MK |
3632 | } |
3633 | ||
520d5d76 | 3634 | /* |
3635 | * Function to convert evpn route to string. | |
3636 | * NOTE: We don't use prefix2str as the output here is a bit different. | |
3637 | */ | |
d62a17ae | 3638 | char *bgp_evpn_route2str(struct prefix_evpn *p, char *buf, int len) |
3639 | { | |
3640 | char buf1[ETHER_ADDR_STRLEN]; | |
3641 | char buf2[PREFIX2STR_BUFFER]; | |
3642 | ||
3643 | if (p->prefix.route_type == BGP_EVPN_IMET_ROUTE) { | |
3644 | snprintf(buf, len, "[%d]:[0]:[%d]:[%s]", p->prefix.route_type, | |
3645 | IS_EVPN_PREFIX_IPADDR_V4(p) ? IPV4_MAX_BITLEN | |
3646 | : IPV6_MAX_BITLEN, | |
3647 | inet_ntoa(p->prefix.ip.ipaddr_v4)); | |
3648 | } else if (p->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) { | |
3649 | if (IS_EVPN_PREFIX_IPADDR_NONE(p)) | |
3650 | snprintf(buf, len, "[%d]:[0]:[0]:[%d]:[%s]", | |
28328ea9 | 3651 | p->prefix.route_type, 8 * ETH_ALEN, |
d62a17ae | 3652 | prefix_mac2str(&p->prefix.mac, buf1, |
3653 | sizeof(buf1))); | |
3654 | else { | |
3655 | u_char family; | |
3656 | ||
3657 | family = IS_EVPN_PREFIX_IPADDR_V4(p) ? AF_INET | |
3658 | : AF_INET6; | |
3659 | snprintf(buf, len, "[%d]:[0]:[0]:[%d]:[%s]:[%d]:[%s]", | |
28328ea9 | 3660 | p->prefix.route_type, 8 * ETH_ALEN, |
d62a17ae | 3661 | prefix_mac2str(&p->prefix.mac, buf1, |
3662 | sizeof(buf1)), | |
3663 | family == AF_INET ? IPV4_MAX_BITLEN | |
3664 | : IPV6_MAX_BITLEN, | |
3665 | inet_ntop(family, &p->prefix.ip.ip.addr, buf2, | |
3666 | PREFIX2STR_BUFFER)); | |
3667 | } | |
342dd0c6 | 3668 | } else if (p->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE) { |
b3628c70 | 3669 | snprintf(buf, len, "[%d]:[0]:[0]:[%d]:[%s]", |
342dd0c6 | 3670 | p->prefix.route_type, |
3671 | p->prefix.ip_prefix_length, | |
3672 | IS_EVPN_PREFIX_IPADDR_V4(p) ? | |
3673 | inet_ntoa(p->prefix.ip.ipaddr_v4) : | |
3674 | inet6_ntoa(p->prefix.ip.ipaddr_v6)); | |
d62a17ae | 3675 | } else { |
b03b8898 | 3676 | /* For EVPN route types not supported yet. */ |
f9aa3e55 QY |
3677 | snprintf(buf, len, "(unsupported route type %d)", |
3678 | p->prefix.route_type); | |
d62a17ae | 3679 | } |
3680 | ||
3681 | return (buf); | |
520d5d76 | 3682 | } |
3683 | ||
128ea8ab | 3684 | /* |
3685 | * Encode EVPN prefix in Update (MP_REACH) | |
3686 | */ | |
d62a17ae | 3687 | void bgp_evpn_encode_prefix(struct stream *s, struct prefix *p, |
b57ba6d2 MK |
3688 | struct prefix_rd *prd, |
3689 | mpls_label_t *label, u_int32_t num_labels, | |
d62a17ae | 3690 | struct attr *attr, int addpath_encode, |
3691 | u_int32_t addpath_tx_id) | |
3692 | { | |
3693 | struct prefix_evpn *evp = (struct prefix_evpn *)p; | |
b57ba6d2 | 3694 | int len, ipa_len = 0; |
d62a17ae | 3695 | |
3696 | if (addpath_encode) | |
3697 | stream_putl(s, addpath_tx_id); | |
3698 | ||
3699 | /* Route type */ | |
3700 | stream_putc(s, evp->prefix.route_type); | |
3701 | ||
3702 | switch (evp->prefix.route_type) { | |
3703 | case BGP_EVPN_MAC_IP_ROUTE: | |
3704 | if (IS_EVPN_PREFIX_IPADDR_V4(evp)) | |
3705 | ipa_len = IPV4_MAX_BYTELEN; | |
3706 | else if (IS_EVPN_PREFIX_IPADDR_V6(evp)) | |
3707 | ipa_len = IPV6_MAX_BYTELEN; | |
b57ba6d2 MK |
3708 | /* RD, ESI, EthTag, MAC+len, IP len, [IP], 1 VNI */ |
3709 | len = 8 + 10 + 4 + 1 + 6 + 1 + ipa_len + 3; | |
3710 | if (ipa_len && num_labels > 1) /* There are 2 VNIs */ | |
3711 | len += 3; | |
3712 | stream_putc(s, len); | |
d62a17ae | 3713 | stream_put(s, prd->val, 8); /* RD */ |
3714 | stream_put(s, 0, 10); /* ESI */ | |
3715 | stream_putl(s, 0); /* Ethernet Tag ID */ | |
28328ea9 | 3716 | stream_putc(s, 8 * ETH_ALEN); /* Mac Addr Len - bits */ |
d62a17ae | 3717 | stream_put(s, evp->prefix.mac.octet, 6); /* Mac Addr */ |
3718 | stream_putc(s, 8 * ipa_len); /* IP address Length */ | |
b57ba6d2 MK |
3719 | if (ipa_len) /* IP */ |
3720 | stream_put(s, &evp->prefix.ip.ip.addr, ipa_len); | |
3721 | /* 1st label is the L2 VNI */ | |
3722 | stream_put(s, label, BGP_LABEL_BYTES); | |
3723 | /* Include 2nd label (L3 VNI) if advertising MAC+IP */ | |
3724 | if (ipa_len && num_labels > 1) | |
3725 | stream_put(s, label+1, BGP_LABEL_BYTES); | |
d62a17ae | 3726 | break; |
3727 | ||
3728 | case BGP_EVPN_IMET_ROUTE: | |
3729 | stream_putc(s, 17); // TODO: length - assumes IPv4 address | |
3730 | stream_put(s, prd->val, 8); /* RD */ | |
3731 | stream_putl(s, 0); /* Ethernet Tag ID */ | |
3732 | stream_putc(s, IPV4_MAX_BITLEN); /* IP address Length - bits */ | |
3733 | /* Originating Router's IP Addr */ | |
3734 | stream_put_in_addr(s, &evp->prefix.ip.ipaddr_v4); | |
3735 | break; | |
3736 | ||
3737 | case BGP_EVPN_IP_PREFIX_ROUTE: | |
3738 | /* TODO: AddPath support. */ | |
b57ba6d2 | 3739 | evpn_mpattr_encode_type5(s, p, prd, label, num_labels, attr); |
d62a17ae | 3740 | break; |
3741 | ||
3742 | default: | |
3743 | break; | |
3744 | } | |
3745 | } | |
3746 | ||
3747 | int bgp_nlri_parse_evpn(struct peer *peer, struct attr *attr, | |
3748 | struct bgp_nlri *packet, int withdraw) | |
3749 | { | |
3750 | u_char *pnt; | |
3751 | u_char *lim; | |
3752 | afi_t afi; | |
3753 | safi_t safi; | |
3754 | u_int32_t addpath_id; | |
3755 | int addpath_encoded; | |
3756 | int psize = 0; | |
3757 | u_char rtype; | |
3758 | u_char rlen; | |
3759 | struct prefix p; | |
3760 | ||
3761 | /* Check peer status. */ | |
3762 | if (peer->status != Established) { | |
3763 | zlog_err("%u:%s - EVPN update received in state %d", | |
3764 | peer->bgp->vrf_id, peer->host, peer->status); | |
3765 | return -1; | |
3766 | } | |
3767 | ||
3768 | /* Start processing the NLRI - there may be multiple in the MP_REACH */ | |
3769 | pnt = packet->nlri; | |
3770 | lim = pnt + packet->length; | |
3771 | afi = packet->afi; | |
3772 | safi = packet->safi; | |
3773 | addpath_id = 0; | |
3774 | ||
3775 | addpath_encoded = | |
3776 | (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ADDPATH_AF_RX_ADV) | |
3777 | && CHECK_FLAG(peer->af_cap[afi][safi], | |
3778 | PEER_CAP_ADDPATH_AF_TX_RCV)); | |
3779 | ||
3780 | for (; pnt < lim; pnt += psize) { | |
3781 | /* Clear prefix structure. */ | |
3782 | memset(&p, 0, sizeof(struct prefix)); | |
3783 | ||
3784 | /* Deal with path-id if AddPath is supported. */ | |
3785 | if (addpath_encoded) { | |
3786 | /* When packet overflow occurs return immediately. */ | |
3787 | if (pnt + BGP_ADDPATH_ID_LEN > lim) | |
3788 | return -1; | |
3789 | ||
3790 | addpath_id = ntohl(*((uint32_t *)pnt)); | |
3791 | pnt += BGP_ADDPATH_ID_LEN; | |
3792 | } | |
3793 | ||
3794 | /* All EVPN NLRI types start with type and length. */ | |
3795 | if (pnt + 2 > lim) | |
3796 | return -1; | |
3797 | ||
3798 | rtype = *pnt++; | |
3799 | psize = rlen = *pnt++; | |
3800 | ||
3801 | /* When packet overflow occur return immediately. */ | |
3802 | if (pnt + psize > lim) | |
3803 | return -1; | |
3804 | ||
3805 | switch (rtype) { | |
3806 | case BGP_EVPN_MAC_IP_ROUTE: | |
3807 | if (process_type2_route(peer, afi, safi, | |
3808 | withdraw ? NULL : attr, pnt, | |
3809 | psize, addpath_id)) { | |
3810 | zlog_err( | |
3811 | "%u:%s - Error in processing EVPN type-2 NLRI size %d", | |
3812 | peer->bgp->vrf_id, peer->host, psize); | |
3813 | return -1; | |
3814 | } | |
3815 | break; | |
3816 | ||
3817 | case BGP_EVPN_IMET_ROUTE: | |
3818 | if (process_type3_route(peer, afi, safi, | |
3819 | withdraw ? NULL : attr, pnt, | |
3820 | psize, addpath_id)) { | |
3821 | zlog_err( | |
3822 | "%u:%s - Error in processing EVPN type-3 NLRI size %d", | |
3823 | peer->bgp->vrf_id, peer->host, psize); | |
3824 | return -1; | |
3825 | } | |
3826 | break; | |
3827 | ||
3828 | case BGP_EVPN_IP_PREFIX_ROUTE: | |
3829 | if (process_type5_route(peer, afi, safi, attr, pnt, | |
3830 | psize, addpath_id, withdraw)) { | |
3831 | zlog_err( | |
3832 | "%u:%s - Error in processing EVPN type-5 NLRI size %d", | |
3833 | peer->bgp->vrf_id, peer->host, psize); | |
3834 | return -1; | |
3835 | } | |
3836 | break; | |
3837 | ||
3838 | default: | |
3839 | break; | |
3840 | } | |
3841 | } | |
3842 | ||
3843 | /* Packet length consistency check. */ | |
3844 | if (pnt != lim) | |
3845 | return -1; | |
3846 | ||
3847 | return 0; | |
128ea8ab | 3848 | } |
3849 | ||
10ebe1ab MK |
3850 | /* |
3851 | * Map the RTs (configured or automatically derived) of a VRF to the VRF. | |
3852 | * The mapping will be used during route processing. | |
3853 | * bgp_def: default bgp instance | |
3854 | * bgp_vrf: specific bgp vrf instance on which RT is configured | |
3855 | */ | |
3856 | void bgp_evpn_map_vrf_to_its_rts(struct bgp *bgp_vrf) | |
3857 | { | |
3858 | int i = 0; | |
3859 | struct ecommunity_val *eval = NULL; | |
3860 | struct listnode *node = NULL, *nnode = NULL; | |
3861 | struct ecommunity *ecom = NULL; | |
3862 | ||
3863 | for (ALL_LIST_ELEMENTS(bgp_vrf->vrf_import_rtl, node, nnode, ecom)) { | |
3864 | for (i = 0; i < ecom->size; i++) { | |
3865 | eval = (struct ecommunity_val *)(ecom->val | |
3866 | + (i | |
3867 | * ECOMMUNITY_SIZE)); | |
3868 | map_vrf_to_rt(bgp_vrf, eval); | |
3869 | } | |
3870 | } | |
3871 | } | |
3872 | ||
3873 | /* | |
3874 | * Unmap the RTs (configured or automatically derived) of a VRF from the VRF. | |
3875 | */ | |
3876 | void bgp_evpn_unmap_vrf_from_its_rts(struct bgp *bgp_vrf) | |
3877 | { | |
3878 | int i; | |
3879 | struct ecommunity_val *eval; | |
3880 | struct listnode *node, *nnode; | |
3881 | struct ecommunity *ecom; | |
3882 | ||
3883 | for (ALL_LIST_ELEMENTS(bgp_vrf->vrf_import_rtl, node, nnode, ecom)) { | |
3884 | for (i = 0; i < ecom->size; i++) { | |
3885 | struct vrf_irt_node *irt; | |
3886 | struct ecommunity_val eval_tmp; | |
3887 | ||
3888 | eval = (struct ecommunity_val *)(ecom->val | |
3889 | + (i | |
3890 | * ECOMMUNITY_SIZE)); | |
3891 | /* If using "automatic" RT, we only care about the | |
3892 | * local-admin sub-field. | |
3893 | * This is to facilitate using VNI as the RT for EBGP | |
3894 | * peering too. | |
3895 | */ | |
3896 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
3897 | if (!CHECK_FLAG(bgp_vrf->vrf_flags, | |
3898 | BGP_VRF_IMPORT_RT_CFGD)) | |
3899 | mask_ecom_global_admin(&eval_tmp, eval); | |
3900 | ||
3901 | irt = lookup_vrf_import_rt(&eval_tmp); | |
3902 | if (irt) | |
3903 | unmap_vrf_from_rt(bgp_vrf, irt); | |
3904 | } | |
3905 | } | |
3906 | } | |
3907 | ||
3908 | ||
128ea8ab | 3909 | |
3910 | /* | |
3911 | * Map the RTs (configured or automatically derived) of a VNI to the VNI. | |
3912 | * The mapping will be used during route processing. | |
3913 | */ | |
d62a17ae | 3914 | void bgp_evpn_map_vni_to_its_rts(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 3915 | { |
d62a17ae | 3916 | int i; |
3917 | struct ecommunity_val *eval; | |
3918 | struct listnode *node, *nnode; | |
3919 | struct ecommunity *ecom; | |
128ea8ab | 3920 | |
d62a17ae | 3921 | for (ALL_LIST_ELEMENTS(vpn->import_rtl, node, nnode, ecom)) { |
3922 | for (i = 0; i < ecom->size; i++) { | |
3923 | eval = (struct ecommunity_val *)(ecom->val | |
3924 | + (i | |
3925 | * ECOMMUNITY_SIZE)); | |
3926 | map_vni_to_rt(bgp, vpn, eval); | |
3927 | } | |
3928 | } | |
128ea8ab | 3929 | } |
3930 | ||
3931 | /* | |
3932 | * Unmap the RTs (configured or automatically derived) of a VNI from the VNI. | |
3933 | */ | |
d62a17ae | 3934 | void bgp_evpn_unmap_vni_from_its_rts(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 3935 | { |
d62a17ae | 3936 | int i; |
3937 | struct ecommunity_val *eval; | |
3938 | struct listnode *node, *nnode; | |
3939 | struct ecommunity *ecom; | |
128ea8ab | 3940 | |
d62a17ae | 3941 | for (ALL_LIST_ELEMENTS(vpn->import_rtl, node, nnode, ecom)) { |
3942 | for (i = 0; i < ecom->size; i++) { | |
3943 | struct irt_node *irt; | |
3944 | struct ecommunity_val eval_tmp; | |
128ea8ab | 3945 | |
d62a17ae | 3946 | eval = (struct ecommunity_val *)(ecom->val |
3947 | + (i | |
3948 | * ECOMMUNITY_SIZE)); | |
3949 | /* If using "automatic" RT, we only care about the | |
3950 | * local-admin sub-field. | |
3951 | * This is to facilitate using VNI as the RT for EBGP | |
3952 | * peering too. | |
3953 | */ | |
3954 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
3955 | if (!is_import_rt_configured(vpn)) | |
3956 | mask_ecom_global_admin(&eval_tmp, eval); | |
128ea8ab | 3957 | |
d62a17ae | 3958 | irt = lookup_import_rt(bgp, &eval_tmp); |
3959 | if (irt) | |
3960 | unmap_vni_from_rt(bgp, vpn, irt); | |
3961 | } | |
3962 | } | |
128ea8ab | 3963 | } |
3964 | ||
3965 | /* | |
3966 | * Derive Import RT automatically for VNI and map VNI to RT. | |
3967 | * The mapping will be used during route processing. | |
3968 | */ | |
d62a17ae | 3969 | void bgp_evpn_derive_auto_rt_import(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 3970 | { |
c581d8b0 | 3971 | form_auto_rt(bgp, vpn->vni, vpn->import_rtl); |
d62a17ae | 3972 | UNSET_FLAG(vpn->flags, VNI_FLAG_IMPRT_CFGD); |
128ea8ab | 3973 | |
d62a17ae | 3974 | /* Map RT to VNI */ |
3975 | bgp_evpn_map_vni_to_its_rts(bgp, vpn); | |
128ea8ab | 3976 | } |
3977 | ||
3978 | /* | |
3979 | * Derive Export RT automatically for VNI. | |
3980 | */ | |
d62a17ae | 3981 | void bgp_evpn_derive_auto_rt_export(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 3982 | { |
c581d8b0 | 3983 | form_auto_rt(bgp, vpn->vni, vpn->export_rtl); |
d62a17ae | 3984 | UNSET_FLAG(vpn->flags, VNI_FLAG_EXPRT_CFGD); |
128ea8ab | 3985 | } |
3986 | ||
676f83b9 | 3987 | /* |
3988 | * Derive RD automatically for VNI using passed information - it | |
3989 | * is of the form RouterId:unique-id-for-vni. | |
3990 | */ | |
3991 | void bgp_evpn_derive_auto_rd_for_vrf(struct bgp *bgp) | |
3992 | { | |
3993 | char buf[100]; | |
3994 | ||
3995 | bgp->vrf_prd.family = AF_UNSPEC; | |
3996 | bgp->vrf_prd.prefixlen = 64; | |
3997 | sprintf(buf, "%s:%hu", inet_ntoa(bgp->router_id), bgp->vrf_rd_id); | |
3998 | str2prefix_rd(buf, &bgp->vrf_prd); | |
3999 | } | |
4000 | ||
128ea8ab | 4001 | /* |
4002 | * Derive RD automatically for VNI using passed information - it | |
4003 | * is of the form RouterId:unique-id-for-vni. | |
4004 | */ | |
d62a17ae | 4005 | void bgp_evpn_derive_auto_rd(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 4006 | { |
d62a17ae | 4007 | char buf[100]; |
128ea8ab | 4008 | |
d62a17ae | 4009 | vpn->prd.family = AF_UNSPEC; |
4010 | vpn->prd.prefixlen = 64; | |
4011 | sprintf(buf, "%s:%hu", inet_ntoa(bgp->router_id), vpn->rd_id); | |
cbb65f5e | 4012 | (void)str2prefix_rd(buf, &vpn->prd); |
d62a17ae | 4013 | UNSET_FLAG(vpn->flags, VNI_FLAG_RD_CFGD); |
128ea8ab | 4014 | } |
4015 | ||
4016 | /* | |
4017 | * Lookup VNI. | |
4018 | */ | |
d62a17ae | 4019 | struct bgpevpn *bgp_evpn_lookup_vni(struct bgp *bgp, vni_t vni) |
128ea8ab | 4020 | { |
d62a17ae | 4021 | struct bgpevpn *vpn; |
4022 | struct bgpevpn tmp; | |
128ea8ab | 4023 | |
d62a17ae | 4024 | memset(&tmp, 0, sizeof(struct bgpevpn)); |
4025 | tmp.vni = vni; | |
4026 | vpn = hash_lookup(bgp->vnihash, &tmp); | |
4027 | return vpn; | |
128ea8ab | 4028 | } |
4029 | ||
4030 | /* | |
4031 | * Create a new vpn - invoked upon configuration or zebra notification. | |
4032 | */ | |
d62a17ae | 4033 | struct bgpevpn *bgp_evpn_new(struct bgp *bgp, vni_t vni, |
29c53922 MK |
4034 | struct in_addr originator_ip, |
4035 | vrf_id_t tenant_vrf_id) | |
128ea8ab | 4036 | { |
d62a17ae | 4037 | struct bgpevpn *vpn; |
128ea8ab | 4038 | |
d62a17ae | 4039 | if (!bgp) |
4040 | return NULL; | |
128ea8ab | 4041 | |
d62a17ae | 4042 | vpn = XCALLOC(MTYPE_BGP_EVPN, sizeof(struct bgpevpn)); |
4043 | if (!vpn) | |
4044 | return NULL; | |
128ea8ab | 4045 | |
d62a17ae | 4046 | /* Set values - RD and RT set to defaults. */ |
4047 | vpn->vni = vni; | |
4048 | vpn->originator_ip = originator_ip; | |
29c53922 | 4049 | vpn->tenant_vrf_id = tenant_vrf_id; |
128ea8ab | 4050 | |
d62a17ae | 4051 | /* Initialize route-target import and export lists */ |
4052 | vpn->import_rtl = list_new(); | |
4053 | vpn->import_rtl->cmp = (int (*)(void *, void *))evpn_route_target_cmp; | |
4054 | vpn->export_rtl = list_new(); | |
4055 | vpn->export_rtl->cmp = (int (*)(void *, void *))evpn_route_target_cmp; | |
e9eb5f63 | 4056 | bf_assign_index(bm->rd_idspace, vpn->rd_id); |
d62a17ae | 4057 | derive_rd_rt_for_vni(bgp, vpn); |
128ea8ab | 4058 | |
d62a17ae | 4059 | /* Initialize EVPN route table. */ |
4060 | vpn->route_table = bgp_table_init(AFI_L2VPN, SAFI_EVPN); | |
128ea8ab | 4061 | |
d62a17ae | 4062 | /* Add to hash */ |
4063 | if (!hash_get(bgp->vnihash, vpn, hash_alloc_intern)) { | |
4064 | XFREE(MTYPE_BGP_EVPN, vpn); | |
4065 | return NULL; | |
4066 | } | |
6a8657d0 MK |
4067 | |
4068 | /* add to l2vni list on corresponding vrf */ | |
4069 | bgpevpn_link_to_l3vni(vpn); | |
4070 | ||
d62a17ae | 4071 | QOBJ_REG(vpn, bgpevpn); |
4072 | return vpn; | |
128ea8ab | 4073 | } |
4074 | ||
4075 | /* | |
4076 | * Free a given VPN - called in multiple scenarios such as zebra | |
4077 | * notification, configuration being deleted, advertise-all-vni disabled etc. | |
4078 | * This just frees appropriate memory, caller should have taken other | |
4079 | * needed actions. | |
4080 | */ | |
d62a17ae | 4081 | void bgp_evpn_free(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 4082 | { |
6a8657d0 | 4083 | bgpevpn_unlink_from_l3vni(vpn); |
d62a17ae | 4084 | bgp_table_unlock(vpn->route_table); |
4085 | bgp_evpn_unmap_vni_from_its_rts(bgp, vpn); | |
affe9e99 DS |
4086 | list_delete_and_null(&vpn->import_rtl); |
4087 | list_delete_and_null(&vpn->export_rtl); | |
e9eb5f63 | 4088 | bf_release_index(bm->rd_idspace, vpn->rd_id); |
d62a17ae | 4089 | hash_release(bgp->vnihash, vpn); |
4090 | QOBJ_UNREG(vpn); | |
4091 | XFREE(MTYPE_BGP_EVPN, vpn); | |
128ea8ab | 4092 | } |
4093 | ||
4094 | /* | |
4095 | * Import route into matching VNI(s). | |
4096 | */ | |
d62a17ae | 4097 | int bgp_evpn_import_route(struct bgp *bgp, afi_t afi, safi_t safi, |
4098 | struct prefix *p, struct bgp_info *ri) | |
128ea8ab | 4099 | { |
d62a17ae | 4100 | return install_uninstall_evpn_route(bgp, afi, safi, p, ri, 1); |
128ea8ab | 4101 | } |
4102 | ||
4103 | /* | |
4104 | * Unimport route from matching VNI(s). | |
4105 | */ | |
d62a17ae | 4106 | int bgp_evpn_unimport_route(struct bgp *bgp, afi_t afi, safi_t safi, |
4107 | struct prefix *p, struct bgp_info *ri) | |
128ea8ab | 4108 | { |
d62a17ae | 4109 | return install_uninstall_evpn_route(bgp, afi, safi, p, ri, 0); |
128ea8ab | 4110 | } |
4111 | ||
db0e1937 MK |
4112 | /* filter routes which have martian next hops */ |
4113 | int bgp_filter_evpn_routes_upon_martian_nh_change(struct bgp *bgp) | |
4114 | { | |
0291c246 MK |
4115 | afi_t afi; |
4116 | safi_t safi; | |
4117 | struct bgp_node *rd_rn, *rn; | |
4118 | struct bgp_table *table; | |
4119 | struct bgp_info *ri; | |
db0e1937 MK |
4120 | |
4121 | afi = AFI_L2VPN; | |
4122 | safi = SAFI_EVPN; | |
4123 | ||
4124 | /* Walk entire global routing table and evaluate routes which could be | |
4125 | * imported into this VPN. Note that we cannot just look at the routes | |
4126 | * for the VNI's RD - | |
4127 | * remote routes applicable for this VNI could have any RD. | |
4128 | */ | |
4129 | /* EVPN routes are a 2-level table. */ | |
4130 | for (rd_rn = bgp_table_top(bgp->rib[afi][safi]); rd_rn; | |
4131 | rd_rn = bgp_route_next(rd_rn)) { | |
4132 | table = (struct bgp_table *)(rd_rn->info); | |
4133 | if (!table) | |
4134 | continue; | |
4135 | ||
4136 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) { | |
4137 | ||
4138 | for (ri = rn->info; ri; ri = ri->next) { | |
4139 | ||
4140 | /* Consider "valid" remote routes applicable for | |
4141 | * this VNI. */ | |
4142 | if (!(ri->type == ZEBRA_ROUTE_BGP | |
4143 | && ri->sub_type == BGP_ROUTE_NORMAL)) | |
4144 | continue; | |
4145 | ||
60466a63 | 4146 | if (bgp_nexthop_self(bgp, ri->attr->nexthop)) { |
db0e1937 MK |
4147 | |
4148 | char attr_str[BUFSIZ]; | |
4149 | char pbuf[PREFIX_STRLEN]; | |
4150 | ||
4151 | bgp_dump_attr(ri->attr, attr_str, | |
4152 | BUFSIZ); | |
4153 | ||
4154 | if (bgp_debug_update(ri->peer, &rn->p, | |
4155 | NULL, 1)) | |
4156 | zlog_debug( | |
b682f6de | 4157 | "%u: prefix %s with attr %s - DENIED due to martian or self nexthop", |
db0e1937 MK |
4158 | bgp->vrf_id, |
4159 | prefix2str( | |
60466a63 | 4160 | &rn->p, pbuf, |
db0e1937 MK |
4161 | sizeof(pbuf)), |
4162 | attr_str); | |
4163 | ||
4164 | bgp_evpn_unimport_route(bgp, afi, safi, | |
4165 | &rn->p, ri); | |
4166 | ||
60466a63 QY |
4167 | bgp_rib_remove(rn, ri, ri->peer, afi, |
4168 | safi); | |
db0e1937 | 4169 | } |
db0e1937 MK |
4170 | } |
4171 | } | |
4172 | } | |
4173 | ||
4174 | return 0; | |
4175 | } | |
4176 | ||
128ea8ab | 4177 | /* |
4178 | * Handle del of a local MACIP. | |
4179 | */ | |
d62a17ae | 4180 | int bgp_evpn_local_macip_del(struct bgp *bgp, vni_t vni, struct ethaddr *mac, |
4181 | struct ipaddr *ip) | |
128ea8ab | 4182 | { |
d62a17ae | 4183 | struct bgpevpn *vpn; |
4184 | struct prefix_evpn p; | |
128ea8ab | 4185 | |
d62a17ae | 4186 | if (!bgp->vnihash) { |
4187 | zlog_err("%u: VNI hash not created", bgp->vrf_id); | |
4188 | return -1; | |
4189 | } | |
128ea8ab | 4190 | |
d62a17ae | 4191 | /* Lookup VNI hash - should exist. */ |
4192 | vpn = bgp_evpn_lookup_vni(bgp, vni); | |
4193 | if (!vpn || !is_vni_live(vpn)) { | |
4194 | zlog_warn("%u: VNI hash entry for VNI %u %s at MACIP DEL", | |
4195 | bgp->vrf_id, vni, vpn ? "not live" : "not found"); | |
4196 | return -1; | |
4197 | } | |
128ea8ab | 4198 | |
d62a17ae | 4199 | /* Remove EVPN type-2 route and schedule for processing. */ |
4200 | build_evpn_type2_prefix(&p, mac, ip); | |
4201 | delete_evpn_route(bgp, vpn, &p); | |
128ea8ab | 4202 | |
d62a17ae | 4203 | return 0; |
128ea8ab | 4204 | } |
4205 | ||
4206 | /* | |
4207 | * Handle add of a local MACIP. | |
4208 | */ | |
d62a17ae | 4209 | int bgp_evpn_local_macip_add(struct bgp *bgp, vni_t vni, struct ethaddr *mac, |
1a98c087 | 4210 | struct ipaddr *ip, u_char flags) |
128ea8ab | 4211 | { |
d62a17ae | 4212 | struct bgpevpn *vpn; |
4213 | struct prefix_evpn p; | |
128ea8ab | 4214 | |
d62a17ae | 4215 | if (!bgp->vnihash) { |
4216 | zlog_err("%u: VNI hash not created", bgp->vrf_id); | |
4217 | return -1; | |
4218 | } | |
128ea8ab | 4219 | |
d62a17ae | 4220 | /* Lookup VNI hash - should exist. */ |
4221 | vpn = bgp_evpn_lookup_vni(bgp, vni); | |
4222 | if (!vpn || !is_vni_live(vpn)) { | |
4223 | zlog_warn("%u: VNI hash entry for VNI %u %s at MACIP ADD", | |
4224 | bgp->vrf_id, vni, vpn ? "not live" : "not found"); | |
4225 | return -1; | |
4226 | } | |
128ea8ab | 4227 | |
d62a17ae | 4228 | /* Create EVPN type-2 route and schedule for processing. */ |
4229 | build_evpn_type2_prefix(&p, mac, ip); | |
1a98c087 | 4230 | if (update_evpn_route(bgp, vpn, &p, flags)) { |
d62a17ae | 4231 | char buf[ETHER_ADDR_STRLEN]; |
4232 | char buf2[INET6_ADDRSTRLEN]; | |
128ea8ab | 4233 | |
d62a17ae | 4234 | zlog_err( |
ead40654 | 4235 | "%u:Failed to create Type-2 route, VNI %u %s MAC %s IP %s (flags: 0x%x)", |
1a98c087 | 4236 | bgp->vrf_id, vpn->vni, |
317f1fe0 | 4237 | CHECK_FLAG(flags, ZEBRA_MACIP_TYPE_STICKY) ? "sticky gateway" |
1a98c087 | 4238 | : "", |
d62a17ae | 4239 | prefix_mac2str(mac, buf, sizeof(buf)), |
ead40654 MK |
4240 | ipaddr2str(ip, buf2, sizeof(buf2)), |
4241 | flags); | |
d62a17ae | 4242 | return -1; |
4243 | } | |
128ea8ab | 4244 | |
d62a17ae | 4245 | return 0; |
128ea8ab | 4246 | } |
4247 | ||
6a8657d0 MK |
4248 | static void link_l2vni_hash_to_l3vni(struct hash_backet *backet, |
4249 | struct bgp *bgp_vrf) | |
4250 | { | |
4251 | struct bgpevpn *vpn = NULL; | |
4252 | struct bgp *bgp_def = NULL; | |
4253 | ||
4254 | bgp_def = bgp_get_default(); | |
4255 | assert(bgp_def); | |
4256 | ||
4257 | vpn = (struct bgpevpn *)backet->data; | |
4258 | if (vpn->tenant_vrf_id == bgp_vrf->vrf_id) | |
4259 | bgpevpn_link_to_l3vni(vpn); | |
4260 | } | |
4261 | ||
fe1dc5a3 MK |
4262 | int bgp_evpn_local_l3vni_add(vni_t l3vni, |
4263 | vrf_id_t vrf_id, | |
b67a60d2 | 4264 | struct ethaddr *rmac, |
c48d9f5f MK |
4265 | struct in_addr originator_ip, |
4266 | int filter) | |
fe1dc5a3 MK |
4267 | { |
4268 | struct bgp *bgp_vrf = NULL; /* bgp VRF instance */ | |
4269 | struct bgp *bgp_def = NULL; /* default bgp instance */ | |
f1f8b53c MK |
4270 | struct listnode *node = NULL; |
4271 | struct bgpevpn *vpn = NULL; | |
fe1dc5a3 MK |
4272 | as_t as = 0; |
4273 | ||
4274 | /* get the default instamce - required to get the AS number for VRF | |
523cafc4 | 4275 | * auto-creatio |
4276 | */ | |
fe1dc5a3 MK |
4277 | bgp_def = bgp_get_default(); |
4278 | if (!bgp_def) { | |
4279 | zlog_err("Cannot process L3VNI %u ADD - default BGP instance not yet created", | |
4280 | l3vni); | |
4281 | return -1; | |
4282 | } | |
4283 | as = bgp_def->as; | |
4284 | ||
4285 | /* if the BGP vrf instance doesnt exist - create one */ | |
0b5131c9 | 4286 | bgp_vrf = bgp_lookup_by_name(vrf_id_to_name(vrf_id)); |
fe1dc5a3 MK |
4287 | if (!bgp_vrf) { |
4288 | ||
4289 | int ret = 0; | |
4290 | ||
4291 | ret = bgp_get(&bgp_vrf, &as, vrf_id_to_name(vrf_id), | |
4292 | BGP_INSTANCE_TYPE_VRF); | |
4293 | switch (ret) { | |
4294 | case BGP_ERR_MULTIPLE_INSTANCE_NOT_SET: | |
4295 | zlog_err("'bgp multiple-instance' not present\n"); | |
4296 | return -1; | |
4297 | case BGP_ERR_AS_MISMATCH: | |
4298 | zlog_err("BGP is already running; AS is %u\n", as); | |
4299 | return -1; | |
4300 | case BGP_ERR_INSTANCE_MISMATCH: | |
4301 | zlog_err("BGP instance name and AS number mismatch\n"); | |
4302 | return -1; | |
4303 | } | |
4304 | ||
4305 | /* mark as auto created */ | |
4306 | SET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_AUTO); | |
4307 | } | |
4308 | ||
4309 | /* associate with l3vni */ | |
4310 | bgp_vrf->l3vni = l3vni; | |
4311 | ||
4312 | /* set the router mac - to be used in mac-ip routes for this vrf */ | |
4313 | memcpy(&bgp_vrf->rmac, rmac, sizeof(struct ethaddr)); | |
4314 | ||
b67a60d2 | 4315 | /* set the originator ip */ |
4316 | bgp_vrf->originator_ip = originator_ip; | |
4317 | ||
c48d9f5f MK |
4318 | /* set the right filter - are we using l3vni only for prefix routes? */ |
4319 | if (filter) | |
4320 | SET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_L3VNI_PREFIX_ROUTES_ONLY); | |
4321 | ||
c581d8b0 MK |
4322 | /* auto derive RD/RT */ |
4323 | if (!CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_IMPORT_RT_CFGD)) | |
4324 | evpn_auto_rt_import_add_for_vrf(bgp_vrf); | |
4325 | if (!CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_EXPORT_RT_CFGD)) | |
4326 | evpn_auto_rt_export_add_for_vrf(bgp_vrf); | |
676f83b9 | 4327 | bgp_evpn_derive_auto_rd_for_vrf(bgp_vrf); |
fe1dc5a3 | 4328 | |
6a8657d0 MK |
4329 | /* link all corresponding l2vnis */ |
4330 | hash_iterate(bgp_def->vnihash, | |
4331 | (void (*)(struct hash_backet *, void *)) | |
4332 | link_l2vni_hash_to_l3vni, | |
4333 | bgp_vrf); | |
4334 | ||
c48d9f5f MK |
4335 | /* Only update all corresponding type-2 routes if we are advertising two |
4336 | * labels along with type-2 routes | |
4337 | */ | |
4338 | if (!filter) | |
4339 | for (ALL_LIST_ELEMENTS_RO(bgp_vrf->l2vnis, node, vpn)) | |
4340 | update_routes_for_vni(bgp_def, vpn); | |
fe1dc5a3 | 4341 | |
06d2e8f3 MK |
4342 | /* advertise type-5 routes if needed */ |
4343 | update_advertise_vrf_routes(bgp_vrf); | |
4344 | ||
5ba238b7 MK |
4345 | /* install all remote routes belonging to this l3vni into correspondng |
4346 | * vrf */ | |
4347 | install_routes_for_vrf(bgp_vrf); | |
fe1dc5a3 MK |
4348 | |
4349 | return 0; | |
4350 | } | |
4351 | ||
4352 | int bgp_evpn_local_l3vni_del(vni_t l3vni, | |
4353 | vrf_id_t vrf_id) | |
4354 | { | |
4355 | struct bgp *bgp_vrf = NULL; /* bgp vrf instance */ | |
f1f8b53c MK |
4356 | struct bgp *bgp_def = NULL; /* default bgp instance */ |
4357 | struct listnode *node = NULL; | |
4358 | struct bgpevpn *vpn = NULL; | |
fe1dc5a3 MK |
4359 | |
4360 | bgp_vrf = bgp_lookup_by_vrf_id(vrf_id); | |
4361 | if (!bgp_vrf) { | |
4362 | zlog_err("Cannot process L3VNI %u Del - Could not find BGP instance", | |
4363 | l3vni); | |
4364 | return -1; | |
4365 | } | |
4366 | ||
f1f8b53c MK |
4367 | bgp_def = bgp_get_default(); |
4368 | if (!bgp_def) { | |
4369 | zlog_err("Cannot process L3VNI %u Del - Could not find default BGP instance", | |
4370 | l3vni); | |
4371 | return -1; | |
4372 | } | |
4373 | ||
1eb88002 | 4374 | /* unimport remote routes from VRF, if it is AUTO vrf bgp_delete will |
523cafc4 | 4375 | * take care of uninstalling the routes from zebra |
4376 | */ | |
1eb88002 MK |
4377 | if (!CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_AUTO)) |
4378 | uninstall_routes_for_vrf(bgp_vrf); | |
5ba238b7 | 4379 | |
06d2e8f3 MK |
4380 | /* delete/withdraw all type-5 routes */ |
4381 | delete_withdraw_vrf_routes(bgp_vrf); | |
4382 | ||
fe1dc5a3 MK |
4383 | /* remove the l3vni from vrf instance */ |
4384 | bgp_vrf->l3vni = 0; | |
4385 | ||
4386 | /* remove the Rmac from the BGP vrf */ | |
4387 | memset(&bgp_vrf->rmac, 0, sizeof(struct ethaddr)); | |
4388 | ||
c581d8b0 | 4389 | /* delete RD/RT */ |
23a06e11 | 4390 | if (bgp_vrf->vrf_import_rtl && !list_isempty(bgp_vrf->vrf_import_rtl)) { |
10ebe1ab | 4391 | bgp_evpn_unmap_vrf_from_its_rts(bgp_vrf); |
5ba238b7 | 4392 | list_delete_all_node(bgp_vrf->vrf_import_rtl); |
23a06e11 MK |
4393 | } |
4394 | if (bgp_vrf->vrf_export_rtl && !list_isempty(bgp_vrf->vrf_export_rtl)) { | |
5ba238b7 | 4395 | list_delete_all_node(bgp_vrf->vrf_export_rtl); |
23a06e11 | 4396 | } |
fe1dc5a3 | 4397 | |
f1f8b53c | 4398 | /* update all corresponding local mac-ip routes */ |
c48d9f5f MK |
4399 | if (!CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_L3VNI_PREFIX_ROUTES_ONLY)) { |
4400 | for (ALL_LIST_ELEMENTS_RO(bgp_vrf->l2vnis, node, vpn)) { | |
4401 | UNSET_FLAG(vpn->flags, VNI_FLAG_USE_TWO_LABELS); | |
4402 | update_routes_for_vni(bgp_def, vpn); | |
4403 | } | |
4404 | } | |
fe1dc5a3 MK |
4405 | |
4406 | /* Delete the instance if it was autocreated */ | |
4407 | if (CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_AUTO)) | |
4408 | bgp_delete(bgp_vrf); | |
4409 | ||
4410 | return 0; | |
4411 | } | |
4412 | ||
128ea8ab | 4413 | /* |
4414 | * Handle del of a local VNI. | |
4415 | */ | |
d62a17ae | 4416 | int bgp_evpn_local_vni_del(struct bgp *bgp, vni_t vni) |
128ea8ab | 4417 | { |
d62a17ae | 4418 | struct bgpevpn *vpn; |
128ea8ab | 4419 | |
d62a17ae | 4420 | if (!bgp->vnihash) { |
4421 | zlog_err("%u: VNI hash not created", bgp->vrf_id); | |
4422 | return -1; | |
4423 | } | |
128ea8ab | 4424 | |
d62a17ae | 4425 | /* Locate VNI hash */ |
4426 | vpn = bgp_evpn_lookup_vni(bgp, vni); | |
4427 | if (!vpn) { | |
4428 | zlog_warn("%u: VNI hash entry for VNI %u not found at DEL", | |
4429 | bgp->vrf_id, vni); | |
4430 | return 0; | |
4431 | } | |
128ea8ab | 4432 | |
d62a17ae | 4433 | /* Remove all local EVPN routes and schedule for processing (to |
4434 | * withdraw from peers). | |
4435 | */ | |
4436 | delete_routes_for_vni(bgp, vpn); | |
128ea8ab | 4437 | |
db0e1937 MK |
4438 | /* |
4439 | * tunnel is no longer active, del tunnel ip address from tip_hash | |
4440 | */ | |
4441 | bgp_tip_del(bgp, &vpn->originator_ip); | |
4442 | ||
d62a17ae | 4443 | /* Clear "live" flag and see if hash needs to be freed. */ |
4444 | UNSET_FLAG(vpn->flags, VNI_FLAG_LIVE); | |
4445 | if (!is_vni_configured(vpn)) | |
4446 | bgp_evpn_free(bgp, vpn); | |
128ea8ab | 4447 | |
d62a17ae | 4448 | return 0; |
128ea8ab | 4449 | } |
4450 | ||
4451 | /* | |
4452 | * Handle add (or update) of a local VNI. The only VNI change we care | |
4453 | * about is change to local-tunnel-ip. | |
4454 | */ | |
d62a17ae | 4455 | int bgp_evpn_local_vni_add(struct bgp *bgp, vni_t vni, |
29c53922 MK |
4456 | struct in_addr originator_ip, |
4457 | vrf_id_t tenant_vrf_id) | |
d62a17ae | 4458 | { |
4459 | struct bgpevpn *vpn; | |
4460 | struct prefix_evpn p; | |
4461 | ||
4462 | if (!bgp->vnihash) { | |
4463 | zlog_err("%u: VNI hash not created", bgp->vrf_id); | |
4464 | return -1; | |
4465 | } | |
4466 | ||
4467 | /* Lookup VNI. If present and no change, exit. */ | |
4468 | vpn = bgp_evpn_lookup_vni(bgp, vni); | |
ddd16ed5 | 4469 | if (vpn) { |
29c53922 MK |
4470 | |
4471 | /* update tenant_vrf_id if required */ | |
6a8657d0 MK |
4472 | if (vpn->tenant_vrf_id != tenant_vrf_id) { |
4473 | bgpevpn_unlink_from_l3vni(vpn); | |
29c53922 | 4474 | vpn->tenant_vrf_id = tenant_vrf_id; |
6a8657d0 | 4475 | bgpevpn_link_to_l3vni(vpn); |
e92bd2a2 MK |
4476 | |
4477 | /* update all routes with new export RT for VRFs */ | |
4478 | update_routes_for_vni(bgp, vpn); | |
6a8657d0 | 4479 | } |
29c53922 | 4480 | |
2f1ac16a MK |
4481 | if (is_vni_live(vpn) |
4482 | && IPV4_ADDR_SAME(&vpn->originator_ip, &originator_ip)) | |
d62a17ae | 4483 | /* Probably some other param has changed that we don't |
4484 | * care about. */ | |
4485 | return 0; | |
4486 | ||
4487 | /* Local tunnel endpoint IP address has changed */ | |
ddd16ed5 | 4488 | handle_tunnel_ip_change(bgp, vpn, originator_ip); |
d62a17ae | 4489 | } |
4490 | ||
4491 | /* Create or update as appropriate. */ | |
4492 | if (!vpn) { | |
29c53922 | 4493 | vpn = bgp_evpn_new(bgp, vni, originator_ip, tenant_vrf_id); |
d62a17ae | 4494 | if (!vpn) { |
4495 | zlog_err( | |
4496 | "%u: Failed to allocate VNI entry for VNI %u - at Add", | |
4497 | bgp->vrf_id, vni); | |
4498 | return -1; | |
4499 | } | |
4500 | } | |
4501 | ||
db0e1937 | 4502 | /* if the VNI is live already, there is nothing more to do */ |
ddd16ed5 MK |
4503 | if (is_vni_live(vpn)) |
4504 | return 0; | |
4505 | ||
d62a17ae | 4506 | /* Mark as "live" */ |
4507 | SET_FLAG(vpn->flags, VNI_FLAG_LIVE); | |
4508 | ||
db0e1937 MK |
4509 | /* tunnel is now active, add tunnel-ip to db */ |
4510 | bgp_tip_add(bgp, &originator_ip); | |
4511 | ||
4512 | /* filter routes as nexthop database has changed */ | |
4513 | bgp_filter_evpn_routes_upon_martian_nh_change(bgp); | |
4514 | ||
d62a17ae | 4515 | /* Create EVPN type-3 route and schedule for processing. */ |
4516 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
4517 | if (update_evpn_route(bgp, vpn, &p, 0)) { | |
4518 | zlog_err("%u: Type3 route creation failure for VNI %u", | |
4519 | bgp->vrf_id, vni); | |
4520 | return -1; | |
4521 | } | |
4522 | ||
4523 | /* If we have learnt and retained remote routes (VTEPs, MACs) for this | |
4524 | * VNI, | |
4525 | * install them. | |
4526 | */ | |
4527 | install_routes_for_vni(bgp, vpn); | |
4528 | ||
d7d97010 MK |
4529 | /* If we are advertising gateway mac-ip |
4530 | It needs to be conveyed again to zebra */ | |
4531 | bgp_zebra_advertise_gw_macip(bgp, vpn->advertise_gw_macip, vpn->vni); | |
4532 | ||
d62a17ae | 4533 | return 0; |
b18825eb | 4534 | } |
14c1a7bf | 4535 | |
7724c0a1 | 4536 | /* |
4537 | * Cleanup EVPN information on disable - Need to delete and withdraw | |
4538 | * EVPN routes from peers. | |
4539 | */ | |
d62a17ae | 4540 | void bgp_evpn_cleanup_on_disable(struct bgp *bgp) |
7724c0a1 | 4541 | { |
9d303b37 DL |
4542 | hash_iterate(bgp->vnihash, (void (*)(struct hash_backet *, |
4543 | void *))cleanup_vni_on_disable, | |
4544 | bgp); | |
7724c0a1 | 4545 | } |
4546 | ||
14c1a7bf | 4547 | /* |
4548 | * Cleanup EVPN information - invoked at the time of bgpd exit or when the | |
4549 | * BGP instance (default) is being freed. | |
4550 | */ | |
d62a17ae | 4551 | void bgp_evpn_cleanup(struct bgp *bgp) |
14c1a7bf | 4552 | { |
d62a17ae | 4553 | if (bgp->vnihash) |
9d303b37 DL |
4554 | hash_iterate(bgp->vnihash, (void (*)(struct hash_backet *, |
4555 | void *))free_vni_entry, | |
4556 | bgp); | |
d62a17ae | 4557 | if (bgp->import_rt_hash) |
4558 | hash_free(bgp->import_rt_hash); | |
4559 | bgp->import_rt_hash = NULL; | |
10ebe1ab MK |
4560 | if (bgp->vrf_import_rt_hash) |
4561 | hash_free(bgp->vrf_import_rt_hash); | |
4562 | bgp->vrf_import_rt_hash = NULL; | |
d62a17ae | 4563 | if (bgp->vnihash) |
4564 | hash_free(bgp->vnihash); | |
4565 | bgp->vnihash = NULL; | |
c581d8b0 | 4566 | if (bgp->vrf_import_rtl) |
bb7a24ab | 4567 | list_delete_and_null(&bgp->vrf_import_rtl); |
c581d8b0 | 4568 | if (bgp->vrf_export_rtl) |
bb7a24ab | 4569 | list_delete_and_null(&bgp->vrf_export_rtl); |
6a8657d0 | 4570 | if (bgp->l2vnis) |
bb7a24ab | 4571 | list_delete_and_null(&bgp->l2vnis); |
676f83b9 | 4572 | bf_release_index(bm->rd_idspace, bgp->vrf_rd_id); |
14c1a7bf | 4573 | } |
4574 | ||
4575 | /* | |
4576 | * Initialization for EVPN | |
4577 | * Create | |
4578 | * VNI hash table | |
4579 | * hash for RT to VNI | |
676f83b9 | 4580 | * assign a unique rd id for auto derivation of vrf_prd |
14c1a7bf | 4581 | */ |
d62a17ae | 4582 | void bgp_evpn_init(struct bgp *bgp) |
4583 | { | |
4584 | bgp->vnihash = | |
4585 | hash_create(vni_hash_key_make, vni_hash_cmp, "BGP VNI Hash"); | |
4586 | bgp->import_rt_hash = | |
4587 | hash_create(import_rt_hash_key_make, import_rt_hash_cmp, | |
4588 | "BGP Import RT Hash"); | |
10ebe1ab MK |
4589 | bgp->vrf_import_rt_hash = |
4590 | hash_create(vrf_import_rt_hash_key_make, vrf_import_rt_hash_cmp, | |
4591 | "BGP VRF Import RT Hash"); | |
c581d8b0 MK |
4592 | bgp->vrf_import_rtl = list_new(); |
4593 | bgp->vrf_import_rtl->cmp = | |
4594 | (int (*)(void *, void *))evpn_route_target_cmp; | |
4595 | ||
4596 | bgp->vrf_export_rtl = list_new(); | |
4597 | bgp->vrf_export_rtl->cmp = | |
4598 | (int (*)(void *, void *))evpn_route_target_cmp; | |
6a8657d0 MK |
4599 | bgp->l2vnis = list_new(); |
4600 | bgp->l2vnis->cmp = | |
4601 | (int (*)(void *, void *))vni_hash_cmp; | |
676f83b9 | 4602 | bf_assign_index(bm->rd_idspace, bgp->vrf_rd_id); |
4603 | ||
14c1a7bf | 4604 | } |
10ebe1ab MK |
4605 | |
4606 | void bgp_evpn_vrf_delete(struct bgp *bgp_vrf) | |
4607 | { | |
4608 | bgp_evpn_unmap_vrf_from_its_rts(bgp_vrf); | |
4609 | } |