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7ef5a232 | 1 | /* Ethernet-VPN Packet and vty Processing File |
896014f4 | 2 | * Copyright (C) 2016 6WIND |
128ea8ab | 3 | * Copyright (C) 2017 Cumulus Networks, Inc. |
896014f4 | 4 | * |
128ea8ab | 5 | * This file is part of FRR. |
896014f4 DL |
6 | * |
7 | * FRRouting is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2, or (at your option) any | |
10 | * later version. | |
11 | * | |
12 | * FRRouting is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License along | |
18 | * with this program; see the file COPYING; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
7ef5a232 | 21 | |
7ef5a232 PG |
22 | #include <zebra.h> |
23 | ||
24 | #include "command.h" | |
25 | #include "filter.h" | |
26 | #include "prefix.h" | |
27 | #include "log.h" | |
28 | #include "memory.h" | |
29 | #include "stream.h" | |
14c1a7bf | 30 | #include "hash.h" |
31 | #include "jhash.h" | |
32 | #include "bitfield.h" | |
128ea8ab | 33 | #include "zclient.h" |
7ef5a232 PG |
34 | |
35 | #include "bgpd/bgp_attr_evpn.h" | |
36 | #include "bgpd/bgpd.h" | |
37 | #include "bgpd/bgp_table.h" | |
38 | #include "bgpd/bgp_route.h" | |
39 | #include "bgpd/bgp_attr.h" | |
40 | #include "bgpd/bgp_mplsvpn.h" | |
9bedbb1e | 41 | #include "bgpd/bgp_label.h" |
7ef5a232 | 42 | #include "bgpd/bgp_evpn.h" |
14c1a7bf | 43 | #include "bgpd/bgp_evpn_private.h" |
44 | #include "bgpd/bgp_ecommunity.h" | |
128ea8ab | 45 | #include "bgpd/bgp_encap_types.h" |
46 | #include "bgpd/bgp_debug.h" | |
47 | #include "bgpd/bgp_aspath.h" | |
d7d97010 | 48 | #include "bgpd/bgp_zebra.h" |
db0e1937 | 49 | #include "bgpd/bgp_nexthop.h" |
128ea8ab | 50 | |
51 | /* | |
52 | * Definitions and external declarations. | |
53 | */ | |
54 | extern struct zclient *zclient; | |
55 | ||
56 | DEFINE_QOBJ_TYPE(bgpevpn) | |
57 | ||
58 | ||
59 | /* | |
60 | * Static function declarations | |
61 | */ | |
d62a17ae | 62 | static void delete_evpn_route_entry(struct bgp *bgp, struct bgpevpn *vpn, |
63 | afi_t afi, safi_t safi, struct bgp_node *rn, | |
64 | struct bgp_info **ri); | |
65 | static int delete_all_vni_routes(struct bgp *bgp, struct bgpevpn *vpn); | |
14c1a7bf | 66 | |
67 | /* | |
68 | * Private functions. | |
69 | */ | |
70 | ||
71 | /* | |
72 | * Make vni hash key. | |
73 | */ | |
d62a17ae | 74 | static unsigned int vni_hash_key_make(void *p) |
14c1a7bf | 75 | { |
d62a17ae | 76 | struct bgpevpn *vpn = p; |
77 | return (jhash_1word(vpn->vni, 0)); | |
14c1a7bf | 78 | } |
79 | ||
80 | /* | |
81 | * Comparison function for vni hash | |
82 | */ | |
d62a17ae | 83 | static int vni_hash_cmp(const void *p1, const void *p2) |
14c1a7bf | 84 | { |
d62a17ae | 85 | const struct bgpevpn *vpn1 = p1; |
86 | const struct bgpevpn *vpn2 = p2; | |
14c1a7bf | 87 | |
d62a17ae | 88 | if (!vpn1 && !vpn2) |
89 | return 1; | |
90 | if (!vpn1 || !vpn2) | |
91 | return 0; | |
92 | return (vpn1->vni == vpn2->vni); | |
14c1a7bf | 93 | } |
94 | ||
10ebe1ab MK |
95 | /* |
96 | * Make vrf import route target hash key. | |
97 | */ | |
98 | static unsigned int vrf_import_rt_hash_key_make(void *p) | |
99 | { | |
100 | struct vrf_irt_node *irt = p; | |
101 | char *pnt = irt->rt.val; | |
5a1b3fb5 DS |
102 | |
103 | return jhash(pnt, 8, 0x5abc1234); | |
10ebe1ab MK |
104 | } |
105 | ||
106 | /* | |
107 | * Comparison function for vrf import rt hash | |
108 | */ | |
109 | static int vrf_import_rt_hash_cmp(const void *p1, const void *p2) | |
110 | { | |
111 | const struct vrf_irt_node *irt1 = p1; | |
112 | const struct vrf_irt_node *irt2 = p2; | |
113 | ||
114 | if (irt1 == NULL && irt2 == NULL) | |
115 | return 1; | |
116 | ||
117 | if (irt1 == NULL || irt2 == NULL) | |
118 | return 0; | |
119 | ||
120 | return (memcmp(irt1->rt.val, irt2->rt.val, ECOMMUNITY_SIZE) == 0); | |
121 | } | |
122 | ||
123 | /* | |
124 | * Create a new vrf import_rt in default instance | |
125 | */ | |
126 | static struct vrf_irt_node *vrf_import_rt_new(struct ecommunity_val *rt) | |
127 | { | |
128 | struct bgp *bgp_def = NULL; | |
129 | struct vrf_irt_node *irt; | |
130 | ||
131 | bgp_def = bgp_get_default(); | |
132 | if (!bgp_def) { | |
133 | zlog_err("vrf import rt new - def instance not created yet"); | |
134 | return NULL; | |
135 | } | |
136 | ||
137 | irt = XCALLOC(MTYPE_BGP_EVPN_VRF_IMPORT_RT, | |
138 | sizeof(struct vrf_irt_node)); | |
139 | if (!irt) | |
140 | return NULL; | |
141 | ||
142 | irt->rt = *rt; | |
143 | irt->vrfs = list_new(); | |
144 | ||
145 | /* Add to hash */ | |
146 | if (!hash_get(bgp_def->vrf_import_rt_hash, irt, hash_alloc_intern)) { | |
147 | XFREE(MTYPE_BGP_EVPN_VRF_IMPORT_RT, irt); | |
148 | return NULL; | |
149 | } | |
150 | ||
151 | return irt; | |
152 | } | |
153 | ||
154 | /* | |
155 | * Free the vrf import rt node | |
156 | */ | |
157 | static void vrf_import_rt_free(struct vrf_irt_node *irt) | |
158 | { | |
159 | struct bgp *bgp_def = NULL; | |
160 | ||
161 | bgp_def = bgp_get_default(); | |
162 | if (!bgp_def) { | |
163 | zlog_err("vrf import rt free - def instance not created yet"); | |
164 | return; | |
165 | } | |
166 | ||
167 | hash_release(bgp_def->vrf_import_rt_hash, irt); | |
168 | XFREE(MTYPE_BGP_EVPN_VRF_IMPORT_RT, irt); | |
169 | } | |
170 | ||
171 | /* | |
172 | * Function to lookup Import RT node - used to map a RT to set of | |
173 | * VNIs importing routes with that RT. | |
174 | */ | |
175 | static struct vrf_irt_node *lookup_vrf_import_rt(struct ecommunity_val *rt) | |
176 | { | |
177 | struct bgp *bgp_def = NULL; | |
178 | struct vrf_irt_node *irt; | |
179 | struct vrf_irt_node tmp; | |
180 | ||
181 | bgp_def = bgp_get_default(); | |
182 | if (!bgp_def) { | |
183 | zlog_err("vrf import rt lookup - def instance not created yet"); | |
184 | return NULL; | |
185 | } | |
186 | ||
187 | memset(&tmp, 0, sizeof(struct vrf_irt_node)); | |
188 | memcpy(&tmp.rt, rt, ECOMMUNITY_SIZE); | |
189 | irt = hash_lookup(bgp_def->vrf_import_rt_hash, &tmp); | |
190 | return irt; | |
191 | } | |
192 | ||
193 | /* | |
194 | * Is specified VRF present on the RT's list of "importing" VRFs? | |
195 | */ | |
996c9314 | 196 | static int is_vrf_present_in_irt_vrfs(struct list *vrfs, struct bgp *bgp_vrf) |
10ebe1ab MK |
197 | { |
198 | struct listnode *node = NULL, *nnode = NULL; | |
199 | struct bgp *tmp_bgp_vrf = NULL; | |
200 | ||
201 | for (ALL_LIST_ELEMENTS(vrfs, node, nnode, tmp_bgp_vrf)) { | |
202 | if (tmp_bgp_vrf == bgp_vrf) | |
203 | return 1; | |
204 | } | |
205 | return 0; | |
206 | } | |
207 | ||
14c1a7bf | 208 | /* |
209 | * Make import route target hash key. | |
210 | */ | |
d62a17ae | 211 | static unsigned int import_rt_hash_key_make(void *p) |
14c1a7bf | 212 | { |
d62a17ae | 213 | struct irt_node *irt = p; |
214 | char *pnt = irt->rt.val; | |
5a1b3fb5 DS |
215 | |
216 | return jhash(pnt, 8, 0xdeadbeef); | |
14c1a7bf | 217 | } |
218 | ||
219 | /* | |
220 | * Comparison function for import rt hash | |
221 | */ | |
d62a17ae | 222 | static int import_rt_hash_cmp(const void *p1, const void *p2) |
14c1a7bf | 223 | { |
d62a17ae | 224 | const struct irt_node *irt1 = p1; |
225 | const struct irt_node *irt2 = p2; | |
14c1a7bf | 226 | |
d62a17ae | 227 | if (irt1 == NULL && irt2 == NULL) |
228 | return 1; | |
14c1a7bf | 229 | |
d62a17ae | 230 | if (irt1 == NULL || irt2 == NULL) |
231 | return 0; | |
14c1a7bf | 232 | |
d62a17ae | 233 | return (memcmp(irt1->rt.val, irt2->rt.val, ECOMMUNITY_SIZE) == 0); |
14c1a7bf | 234 | } |
235 | ||
7724c0a1 | 236 | /* |
128ea8ab | 237 | * Create a new import_rt |
238 | */ | |
d62a17ae | 239 | static struct irt_node *import_rt_new(struct bgp *bgp, |
240 | struct ecommunity_val *rt) | |
128ea8ab | 241 | { |
d62a17ae | 242 | struct irt_node *irt; |
128ea8ab | 243 | |
d62a17ae | 244 | if (!bgp) |
245 | return NULL; | |
128ea8ab | 246 | |
d62a17ae | 247 | irt = XCALLOC(MTYPE_BGP_EVPN_IMPORT_RT, sizeof(struct irt_node)); |
248 | if (!irt) | |
249 | return NULL; | |
128ea8ab | 250 | |
d62a17ae | 251 | irt->rt = *rt; |
252 | irt->vnis = list_new(); | |
128ea8ab | 253 | |
d62a17ae | 254 | /* Add to hash */ |
255 | if (!hash_get(bgp->import_rt_hash, irt, hash_alloc_intern)) { | |
256 | XFREE(MTYPE_BGP_EVPN_IMPORT_RT, irt); | |
257 | return NULL; | |
258 | } | |
128ea8ab | 259 | |
d62a17ae | 260 | return irt; |
128ea8ab | 261 | } |
262 | ||
263 | /* | |
264 | * Free the import rt node | |
7724c0a1 | 265 | */ |
d62a17ae | 266 | static void import_rt_free(struct bgp *bgp, struct irt_node *irt) |
7724c0a1 | 267 | { |
d62a17ae | 268 | hash_release(bgp->import_rt_hash, irt); |
269 | XFREE(MTYPE_BGP_EVPN_IMPORT_RT, irt); | |
7724c0a1 | 270 | } |
271 | ||
14c1a7bf | 272 | /* |
128ea8ab | 273 | * Function to lookup Import RT node - used to map a RT to set of |
274 | * VNIs importing routes with that RT. | |
275 | */ | |
d62a17ae | 276 | static struct irt_node *lookup_import_rt(struct bgp *bgp, |
277 | struct ecommunity_val *rt) | |
128ea8ab | 278 | { |
d62a17ae | 279 | struct irt_node *irt; |
280 | struct irt_node tmp; | |
128ea8ab | 281 | |
d62a17ae | 282 | memset(&tmp, 0, sizeof(struct irt_node)); |
283 | memcpy(&tmp.rt, rt, ECOMMUNITY_SIZE); | |
284 | irt = hash_lookup(bgp->import_rt_hash, &tmp); | |
285 | return irt; | |
128ea8ab | 286 | } |
287 | ||
288 | /* | |
289 | * Is specified VNI present on the RT's list of "importing" VNIs? | |
290 | */ | |
d62a17ae | 291 | static int is_vni_present_in_irt_vnis(struct list *vnis, struct bgpevpn *vpn) |
128ea8ab | 292 | { |
d62a17ae | 293 | struct listnode *node, *nnode; |
294 | struct bgpevpn *tmp_vpn; | |
128ea8ab | 295 | |
d62a17ae | 296 | for (ALL_LIST_ELEMENTS(vnis, node, nnode, tmp_vpn)) { |
297 | if (tmp_vpn == vpn) | |
298 | return 1; | |
299 | } | |
128ea8ab | 300 | |
d62a17ae | 301 | return 0; |
128ea8ab | 302 | } |
303 | ||
304 | /* | |
305 | * Compare Route Targets. | |
306 | */ | |
d62a17ae | 307 | static int evpn_route_target_cmp(struct ecommunity *ecom1, |
308 | struct ecommunity *ecom2) | |
128ea8ab | 309 | { |
d62a17ae | 310 | if (ecom1 && !ecom2) |
311 | return -1; | |
128ea8ab | 312 | |
d62a17ae | 313 | if (!ecom1 && ecom2) |
314 | return 1; | |
128ea8ab | 315 | |
d62a17ae | 316 | if (!ecom1 && !ecom2) |
317 | return 0; | |
128ea8ab | 318 | |
d62a17ae | 319 | if (ecom1->str && !ecom2->str) |
320 | return -1; | |
128ea8ab | 321 | |
d62a17ae | 322 | if (!ecom1->str && ecom2->str) |
323 | return 1; | |
128ea8ab | 324 | |
d62a17ae | 325 | if (!ecom1->str && !ecom2->str) |
326 | return 0; | |
128ea8ab | 327 | |
d62a17ae | 328 | return strcmp(ecom1->str, ecom2->str); |
128ea8ab | 329 | } |
330 | ||
331 | /* | |
332 | * Mask off global-admin field of specified extended community (RT), | |
333 | * just retain the local-admin field. | |
334 | */ | |
d62a17ae | 335 | static inline void mask_ecom_global_admin(struct ecommunity_val *dst, |
336 | struct ecommunity_val *src) | |
128ea8ab | 337 | { |
d62a17ae | 338 | u_char type; |
128ea8ab | 339 | |
d62a17ae | 340 | type = src->val[0]; |
341 | dst->val[0] = 0; | |
342 | if (type == ECOMMUNITY_ENCODE_AS) { | |
343 | dst->val[2] = dst->val[3] = 0; | |
344 | } else if (type == ECOMMUNITY_ENCODE_AS4 | |
345 | || type == ECOMMUNITY_ENCODE_IP) { | |
346 | dst->val[2] = dst->val[3] = 0; | |
347 | dst->val[4] = dst->val[5] = 0; | |
348 | } | |
128ea8ab | 349 | } |
350 | ||
10ebe1ab MK |
351 | /* |
352 | * Map one RT to specified VRF. | |
353 | * bgp_vrf = BGP vrf instance | |
354 | */ | |
996c9314 | 355 | static void map_vrf_to_rt(struct bgp *bgp_vrf, struct ecommunity_val *eval) |
10ebe1ab MK |
356 | { |
357 | struct vrf_irt_node *irt = NULL; | |
358 | struct ecommunity_val eval_tmp; | |
359 | ||
360 | /* If using "automatic" RT, | |
361 | * we only care about the local-admin sub-field. | |
362 | * This is to facilitate using L3VNI(VRF-VNI) | |
363 | * as the RT for EBGP peering too. | |
364 | */ | |
365 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
996c9314 | 366 | if (!CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_IMPORT_RT_CFGD)) |
10ebe1ab MK |
367 | mask_ecom_global_admin(&eval_tmp, eval); |
368 | ||
369 | irt = lookup_vrf_import_rt(&eval_tmp); | |
e066d6d0 DS |
370 | if (irt && is_vrf_present_in_irt_vrfs(irt->vrfs, bgp_vrf)) |
371 | /* Already mapped. */ | |
372 | return; | |
10ebe1ab | 373 | |
e066d6d0 | 374 | if (!irt) |
10ebe1ab | 375 | irt = vrf_import_rt_new(&eval_tmp); |
10ebe1ab MK |
376 | |
377 | /* Add VRF to the list for this RT. */ | |
378 | listnode_add(irt->vrfs, bgp_vrf); | |
379 | } | |
380 | ||
381 | /* | |
382 | * Unmap specified VRF from specified RT. If there are no other | |
383 | * VRFs for this RT, then the RT hash is deleted. | |
384 | * bgp_vrf: BGP VRF specific instance | |
385 | */ | |
996c9314 | 386 | static void unmap_vrf_from_rt(struct bgp *bgp_vrf, struct vrf_irt_node *irt) |
10ebe1ab MK |
387 | { |
388 | /* Delete VRF from list for this RT. */ | |
389 | listnode_delete(irt->vrfs, bgp_vrf); | |
390 | if (!listnode_head(irt->vrfs)) { | |
bb7a24ab | 391 | list_delete_and_null(&irt->vrfs); |
10ebe1ab MK |
392 | vrf_import_rt_free(irt); |
393 | } | |
394 | } | |
395 | ||
128ea8ab | 396 | /* |
397 | * Map one RT to specified VNI. | |
14c1a7bf | 398 | */ |
d62a17ae | 399 | static void map_vni_to_rt(struct bgp *bgp, struct bgpevpn *vpn, |
400 | struct ecommunity_val *eval) | |
128ea8ab | 401 | { |
d62a17ae | 402 | struct irt_node *irt; |
403 | struct ecommunity_val eval_tmp; | |
128ea8ab | 404 | |
d62a17ae | 405 | /* If using "automatic" RT, we only care about the local-admin |
406 | * sub-field. | |
407 | * This is to facilitate using VNI as the RT for EBGP peering too. | |
408 | */ | |
409 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
410 | if (!is_import_rt_configured(vpn)) | |
411 | mask_ecom_global_admin(&eval_tmp, eval); | |
128ea8ab | 412 | |
d62a17ae | 413 | irt = lookup_import_rt(bgp, &eval_tmp); |
414 | if (irt && irt->vnis) | |
415 | if (is_vni_present_in_irt_vnis(irt->vnis, vpn)) | |
416 | /* Already mapped. */ | |
417 | return; | |
128ea8ab | 418 | |
d62a17ae | 419 | if (!irt) { |
420 | irt = import_rt_new(bgp, &eval_tmp); | |
421 | assert(irt); | |
422 | } | |
128ea8ab | 423 | |
d62a17ae | 424 | /* Add VNI to the hash list for this RT. */ |
425 | listnode_add(irt->vnis, vpn); | |
128ea8ab | 426 | } |
427 | ||
428 | /* | |
429 | * Unmap specified VNI from specified RT. If there are no other | |
430 | * VNIs for this RT, then the RT hash is deleted. | |
431 | */ | |
d62a17ae | 432 | static void unmap_vni_from_rt(struct bgp *bgp, struct bgpevpn *vpn, |
433 | struct irt_node *irt) | |
14c1a7bf | 434 | { |
d62a17ae | 435 | /* Delete VNI from hash list for this RT. */ |
436 | listnode_delete(irt->vnis, vpn); | |
437 | if (!listnode_head(irt->vnis)) { | |
acdf5e25 | 438 | list_delete_and_null(&irt->vnis); |
d62a17ae | 439 | import_rt_free(bgp, irt); |
440 | } | |
14c1a7bf | 441 | } |
442 | ||
128ea8ab | 443 | /* |
444 | * Create RT extended community automatically from passed information: | |
445 | * of the form AS:VNI. | |
446 | * NOTE: We use only the lower 16 bits of the AS. This is sufficient as | |
447 | * the need is to get a RT value that will be unique across different | |
448 | * VNIs but the same across routers (in the same AS) for a particular | |
449 | * VNI. | |
450 | */ | |
c581d8b0 | 451 | static void form_auto_rt(struct bgp *bgp, vni_t vni, struct list *rtl) |
128ea8ab | 452 | { |
d62a17ae | 453 | struct ecommunity_val eval; |
454 | struct ecommunity *ecomadd; | |
128ea8ab | 455 | |
c581d8b0 | 456 | encode_route_target_as((bgp->as & 0xFFFF), vni, &eval); |
128ea8ab | 457 | |
d62a17ae | 458 | ecomadd = ecommunity_new(); |
459 | ecommunity_add_val(ecomadd, &eval); | |
460 | listnode_add_sort(rtl, ecomadd); | |
128ea8ab | 461 | } |
14c1a7bf | 462 | |
463 | /* | |
128ea8ab | 464 | * Derive RD and RT for a VNI automatically. Invoked at the time of |
465 | * creation of a VNI. | |
466 | */ | |
d62a17ae | 467 | static void derive_rd_rt_for_vni(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 468 | { |
d62a17ae | 469 | bgp_evpn_derive_auto_rd(bgp, vpn); |
470 | bgp_evpn_derive_auto_rt_import(bgp, vpn); | |
471 | bgp_evpn_derive_auto_rt_export(bgp, vpn); | |
128ea8ab | 472 | } |
473 | ||
1ec31309 | 474 | /* |
475 | * Convert nexthop (remote VTEP IP) into an IPv6 address. | |
476 | */ | |
477 | static void evpn_convert_nexthop_to_ipv6(struct attr *attr) | |
478 | { | |
479 | if (BGP_ATTR_NEXTHOP_AFI_IP6(attr)) | |
480 | return; | |
481 | ipv4_to_ipv4_mapped_ipv6(&attr->mp_nexthop_global, attr->nexthop); | |
482 | attr->mp_nexthop_len = IPV6_MAX_BYTELEN; | |
483 | } | |
484 | ||
128ea8ab | 485 | /* |
486 | * Add (update) or delete MACIP from zebra. | |
14c1a7bf | 487 | */ |
d62a17ae | 488 | static int bgp_zebra_send_remote_macip(struct bgp *bgp, struct bgpevpn *vpn, |
489 | struct prefix_evpn *p, | |
490 | struct in_addr remote_vtep_ip, int add, | |
ead40654 | 491 | u_char flags) |
d62a17ae | 492 | { |
493 | struct stream *s; | |
494 | int ipa_len; | |
495 | char buf1[ETHER_ADDR_STRLEN]; | |
496 | char buf2[INET6_ADDRSTRLEN]; | |
497 | char buf3[INET6_ADDRSTRLEN]; | |
498 | ||
499 | /* Check socket. */ | |
500 | if (!zclient || zclient->sock < 0) | |
501 | return 0; | |
502 | ||
503 | /* Don't try to register if Zebra doesn't know of this instance. */ | |
504 | if (!IS_BGP_INST_KNOWN_TO_ZEBRA(bgp)) | |
505 | return 0; | |
506 | ||
507 | s = zclient->obuf; | |
508 | stream_reset(s); | |
509 | ||
996c9314 LB |
510 | zclient_create_header( |
511 | s, add ? ZEBRA_REMOTE_MACIP_ADD : ZEBRA_REMOTE_MACIP_DEL, | |
512 | bgp->vrf_id); | |
d62a17ae | 513 | stream_putl(s, vpn->vni); |
28328ea9 | 514 | stream_put(s, &p->prefix.mac.octet, ETH_ALEN); /* Mac Addr */ |
d62a17ae | 515 | /* IP address length and IP address, if any. */ |
516 | if (IS_EVPN_PREFIX_IPADDR_NONE(p)) | |
517 | stream_putl(s, 0); | |
518 | else { | |
519 | ipa_len = IS_EVPN_PREFIX_IPADDR_V4(p) ? IPV4_MAX_BYTELEN | |
520 | : IPV6_MAX_BYTELEN; | |
521 | stream_putl(s, ipa_len); | |
522 | stream_put(s, &p->prefix.ip.ip.addr, ipa_len); | |
523 | } | |
524 | stream_put_in_addr(s, &remote_vtep_ip); | |
525 | ||
ead40654 | 526 | /* TX flags - MAC sticky status and/or gateway mac */ |
d62a17ae | 527 | if (add) |
ead40654 | 528 | stream_putc(s, flags); |
d62a17ae | 529 | |
530 | stream_putw_at(s, 0, stream_get_endp(s)); | |
531 | ||
532 | if (bgp_debug_zebra(NULL)) | |
996c9314 LB |
533 | zlog_debug( |
534 | "Tx %s MACIP, VNI %u MAC %s IP %s (flags: 0x%x) remote VTEP %s", | |
535 | add ? "ADD" : "DEL", vpn->vni, | |
536 | prefix_mac2str(&p->prefix.mac, buf1, sizeof(buf1)), | |
537 | ipaddr2str(&p->prefix.ip, buf3, sizeof(buf3)), flags, | |
538 | inet_ntop(AF_INET, &remote_vtep_ip, buf2, | |
539 | sizeof(buf2))); | |
d62a17ae | 540 | |
541 | return zclient_send_message(zclient); | |
7ef5a232 | 542 | } |
b18825eb | 543 | |
128ea8ab | 544 | /* |
545 | * Add (update) or delete remote VTEP from zebra. | |
546 | */ | |
d62a17ae | 547 | static int bgp_zebra_send_remote_vtep(struct bgp *bgp, struct bgpevpn *vpn, |
548 | struct prefix_evpn *p, int add) | |
128ea8ab | 549 | { |
d62a17ae | 550 | struct stream *s; |
128ea8ab | 551 | |
d62a17ae | 552 | /* Check socket. */ |
553 | if (!zclient || zclient->sock < 0) | |
554 | return 0; | |
128ea8ab | 555 | |
d62a17ae | 556 | /* Don't try to register if Zebra doesn't know of this instance. */ |
557 | if (!IS_BGP_INST_KNOWN_TO_ZEBRA(bgp)) | |
558 | return 0; | |
128ea8ab | 559 | |
d62a17ae | 560 | s = zclient->obuf; |
561 | stream_reset(s); | |
128ea8ab | 562 | |
996c9314 LB |
563 | zclient_create_header( |
564 | s, add ? ZEBRA_REMOTE_VTEP_ADD : ZEBRA_REMOTE_VTEP_DEL, | |
565 | bgp->vrf_id); | |
d62a17ae | 566 | stream_putl(s, vpn->vni); |
567 | if (IS_EVPN_PREFIX_IPADDR_V4(p)) | |
568 | stream_put_in_addr(s, &p->prefix.ip.ipaddr_v4); | |
569 | else if (IS_EVPN_PREFIX_IPADDR_V6(p)) { | |
570 | zlog_err( | |
571 | "Bad remote IP when trying to %s remote VTEP for VNI %u", | |
572 | add ? "ADD" : "DEL", vpn->vni); | |
573 | return -1; | |
574 | } | |
128ea8ab | 575 | |
d62a17ae | 576 | stream_putw_at(s, 0, stream_get_endp(s)); |
128ea8ab | 577 | |
d62a17ae | 578 | if (bgp_debug_zebra(NULL)) |
579 | zlog_debug("Tx %s Remote VTEP, VNI %u remote VTEP %s", | |
580 | add ? "ADD" : "DEL", vpn->vni, | |
581 | inet_ntoa(p->prefix.ip.ipaddr_v4)); | |
128ea8ab | 582 | |
d62a17ae | 583 | return zclient_send_message(zclient); |
128ea8ab | 584 | } |
585 | ||
342dd0c6 | 586 | /* |
587 | * Build extended communities for EVPN prefix route. | |
588 | */ | |
589 | static void build_evpn_type5_route_extcomm(struct bgp *bgp_vrf, | |
590 | struct attr *attr) | |
591 | { | |
592 | struct ecommunity ecom_encap; | |
593 | struct ecommunity ecom_rmac; | |
594 | struct ecommunity_val eval; | |
595 | struct ecommunity_val eval_rmac; | |
596 | bgp_encap_types tnl_type; | |
597 | struct listnode *node, *nnode; | |
598 | struct ecommunity *ecom; | |
599 | struct list *vrf_export_rtl = NULL; | |
600 | ||
601 | /* Encap */ | |
602 | tnl_type = BGP_ENCAP_TYPE_VXLAN; | |
603 | memset(&ecom_encap, 0, sizeof(ecom_encap)); | |
604 | encode_encap_extcomm(tnl_type, &eval); | |
605 | ecom_encap.size = 1; | |
606 | ecom_encap.val = (u_int8_t *)eval.val; | |
607 | ||
608 | /* Add Encap */ | |
609 | attr->ecommunity = ecommunity_dup(&ecom_encap); | |
610 | ||
611 | /* Add the export RTs for L3VNI/VRF */ | |
612 | vrf_export_rtl = bgp_vrf->vrf_export_rtl; | |
613 | if (vrf_export_rtl && !list_isempty(vrf_export_rtl)) { | |
614 | for (ALL_LIST_ELEMENTS(vrf_export_rtl, node, nnode, ecom)) | |
996c9314 LB |
615 | attr->ecommunity = |
616 | ecommunity_merge(attr->ecommunity, ecom); | |
342dd0c6 | 617 | } |
618 | ||
619 | /* add the router mac extended community */ | |
620 | if (!is_zero_mac(&attr->rmac)) { | |
621 | memset(&ecom_rmac, 0, sizeof(ecom_rmac)); | |
622 | encode_rmac_extcomm(&eval_rmac, &attr->rmac); | |
623 | ecom_rmac.size = 1; | |
624 | ecom_rmac.val = (uint8_t *)eval_rmac.val; | |
996c9314 LB |
625 | attr->ecommunity = |
626 | ecommunity_merge(attr->ecommunity, &ecom_rmac); | |
342dd0c6 | 627 | } |
628 | ||
629 | attr->flag |= ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES); | |
630 | } | |
631 | ||
128ea8ab | 632 | /* |
1ec31309 | 633 | * Build extended communities for EVPN route. |
634 | * This function is applicable for type-2 and type-3 routes. The layer-2 RT | |
635 | * and ENCAP extended communities are applicable for all routes. | |
636 | * The default gateway extended community and MAC mobility (sticky) extended | |
637 | * community are added as needed based on passed settings - only for type-2 | |
638 | * routes. Likewise, the layer-3 RT and Router MAC extended communities are | |
639 | * added, if present, based on passed settings - only for non-link-local | |
640 | * type-2 routes. | |
128ea8ab | 641 | */ |
7ec156a9 | 642 | static void build_evpn_route_extcomm(struct bgpevpn *vpn, struct attr *attr, |
1ec31309 | 643 | int add_l3_ecomm) |
128ea8ab | 644 | { |
d62a17ae | 645 | struct ecommunity ecom_encap; |
646 | struct ecommunity ecom_sticky; | |
ead40654 | 647 | struct ecommunity ecom_default_gw; |
bc59a672 | 648 | struct ecommunity ecom_rmac; |
d62a17ae | 649 | struct ecommunity_val eval; |
650 | struct ecommunity_val eval_sticky; | |
ead40654 | 651 | struct ecommunity_val eval_default_gw; |
bc59a672 | 652 | struct ecommunity_val eval_rmac; |
d62a17ae | 653 | bgp_encap_types tnl_type; |
654 | struct listnode *node, *nnode; | |
655 | struct ecommunity *ecom; | |
656 | u_int32_t seqnum; | |
7a3e76f1 | 657 | struct list *vrf_export_rtl = NULL; |
128ea8ab | 658 | |
d62a17ae | 659 | /* Encap */ |
660 | tnl_type = BGP_ENCAP_TYPE_VXLAN; | |
661 | memset(&ecom_encap, 0, sizeof(ecom_encap)); | |
662 | encode_encap_extcomm(tnl_type, &eval); | |
663 | ecom_encap.size = 1; | |
664 | ecom_encap.val = (u_int8_t *)eval.val; | |
128ea8ab | 665 | |
d62a17ae | 666 | /* Add Encap */ |
667 | attr->ecommunity = ecommunity_dup(&ecom_encap); | |
128ea8ab | 668 | |
7a3e76f1 | 669 | /* Add the export RTs for L2VNI */ |
d62a17ae | 670 | for (ALL_LIST_ELEMENTS(vpn->export_rtl, node, nnode, ecom)) |
671 | attr->ecommunity = ecommunity_merge(attr->ecommunity, ecom); | |
128ea8ab | 672 | |
1ec31309 | 673 | /* Add the export RTs for L3VNI if told to - caller determines |
674 | * when this should be done. | |
523cafc4 | 675 | */ |
1ec31309 | 676 | if (add_l3_ecomm) { |
7ec156a9 MK |
677 | vrf_export_rtl = bgpevpn_get_vrf_export_rtl(vpn); |
678 | if (vrf_export_rtl && !list_isempty(vrf_export_rtl)) { | |
679 | for (ALL_LIST_ELEMENTS(vrf_export_rtl, node, nnode, | |
680 | ecom)) | |
996c9314 LB |
681 | attr->ecommunity = ecommunity_merge( |
682 | attr->ecommunity, ecom); | |
7ec156a9 | 683 | } |
f1f8b53c | 684 | } |
7a3e76f1 | 685 | |
1ec31309 | 686 | /* Add MAC mobility (sticky) if needed. */ |
d62a17ae | 687 | if (attr->sticky) { |
688 | seqnum = 0; | |
689 | memset(&ecom_sticky, 0, sizeof(ecom_sticky)); | |
690 | encode_mac_mobility_extcomm(1, seqnum, &eval_sticky); | |
691 | ecom_sticky.size = 1; | |
692 | ecom_sticky.val = (u_int8_t *)eval_sticky.val; | |
693 | attr->ecommunity = | |
694 | ecommunity_merge(attr->ecommunity, &ecom_sticky); | |
695 | } | |
c85c03c7 | 696 | |
1ec31309 | 697 | /* Add RMAC, if told to. */ |
698 | if (add_l3_ecomm) { | |
bc59a672 MK |
699 | memset(&ecom_rmac, 0, sizeof(ecom_rmac)); |
700 | encode_rmac_extcomm(&eval_rmac, &attr->rmac); | |
701 | ecom_rmac.size = 1; | |
702 | ecom_rmac.val = (uint8_t *)eval_rmac.val; | |
996c9314 LB |
703 | attr->ecommunity = |
704 | ecommunity_merge(attr->ecommunity, &ecom_rmac); | |
bc59a672 MK |
705 | } |
706 | ||
1ec31309 | 707 | /* Add default gateway, if needed. */ |
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; | |
996c9314 LB |
713 | attr->ecommunity = |
714 | ecommunity_merge(attr->ecommunity, &ecom_default_gw); | |
ead40654 MK |
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; | |
996c9314 | 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 | |
90f4f482 | 865 | && old_select->sub_type == BGP_ROUTE_IMPORTED |
d62a17ae | 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); | |
996c9314 LB |
874 | ret = evpn_zebra_install( |
875 | bgp, vpn, (struct prefix_evpn *)&rn->p, | |
876 | old_select->attr->nexthop, flags); | |
ead40654 | 877 | } |
d62a17ae | 878 | UNSET_FLAG(old_select->flags, BGP_INFO_MULTIPATH_CHG); |
879 | bgp_zebra_clear_route_change_flags(rn); | |
880 | return ret; | |
881 | } | |
882 | ||
883 | /* If the user did a "clear" this flag will be set */ | |
884 | UNSET_FLAG(rn->flags, BGP_NODE_USER_CLEAR); | |
885 | ||
886 | /* bestpath has changed; update relevant fields and install or uninstall | |
887 | * into the zebra RIB. | |
888 | */ | |
889 | if (old_select || new_select) | |
890 | bgp_bump_version(rn); | |
891 | ||
892 | if (old_select) | |
893 | bgp_info_unset_flag(rn, old_select, BGP_INFO_SELECTED); | |
894 | if (new_select) { | |
895 | bgp_info_set_flag(rn, new_select, BGP_INFO_SELECTED); | |
896 | bgp_info_unset_flag(rn, new_select, BGP_INFO_ATTR_CHANGED); | |
897 | UNSET_FLAG(new_select->flags, BGP_INFO_MULTIPATH_CHG); | |
898 | } | |
899 | ||
900 | if (new_select && new_select->type == ZEBRA_ROUTE_BGP | |
90f4f482 | 901 | && new_select->sub_type == BGP_ROUTE_IMPORTED) { |
ead40654 MK |
902 | flags = 0; |
903 | if (new_select->attr->sticky) | |
904 | SET_FLAG(flags, ZEBRA_MACIP_TYPE_STICKY); | |
905 | if (new_select->attr->default_gw) | |
906 | SET_FLAG(flags, ZEBRA_MACIP_TYPE_GW); | |
d62a17ae | 907 | ret = evpn_zebra_install(bgp, vpn, (struct prefix_evpn *)&rn->p, |
996c9314 | 908 | new_select->attr->nexthop, flags); |
d62a17ae | 909 | /* If an old best existed and it was a "local" route, the only |
910 | * reason | |
911 | * it would be supplanted is due to MAC mobility procedures. So, | |
912 | * we | |
913 | * need to do an implicit delete and withdraw that route from | |
914 | * peers. | |
915 | */ | |
916 | if (old_select && old_select->peer == bgp->peer_self | |
917 | && old_select->type == ZEBRA_ROUTE_BGP | |
918 | && old_select->sub_type == BGP_ROUTE_STATIC) | |
919 | evpn_delete_old_local_route(bgp, vpn, rn, old_select); | |
920 | } else { | |
921 | if (old_select && old_select->type == ZEBRA_ROUTE_BGP | |
90f4f482 | 922 | && old_select->sub_type == BGP_ROUTE_IMPORTED) |
d62a17ae | 923 | ret = evpn_zebra_uninstall(bgp, vpn, |
924 | (struct prefix_evpn *)&rn->p, | |
925 | old_select->attr->nexthop); | |
926 | } | |
927 | ||
928 | /* Clear any route change flags. */ | |
929 | bgp_zebra_clear_route_change_flags(rn); | |
930 | ||
931 | /* Reap old select bgp_info, if it has been removed */ | |
932 | if (old_select && CHECK_FLAG(old_select->flags, BGP_INFO_REMOVED)) | |
933 | bgp_info_reap(rn, old_select); | |
934 | ||
935 | return ret; | |
128ea8ab | 936 | } |
937 | ||
ead40654 MK |
938 | /* |
939 | * Return true if the local ri for this rn is of type gateway mac | |
940 | */ | |
941 | static int evpn_route_is_def_gw(struct bgp *bgp, struct bgp_node *rn) | |
942 | { | |
996c9314 LB |
943 | struct bgp_info *tmp_ri = NULL; |
944 | struct bgp_info *local_ri = NULL; | |
ead40654 MK |
945 | |
946 | local_ri = NULL; | |
947 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) { | |
948 | if (tmp_ri->peer == bgp->peer_self | |
949 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
950 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
951 | local_ri = tmp_ri; | |
952 | } | |
953 | ||
954 | if (!local_ri) | |
955 | return 0; | |
956 | ||
957 | return local_ri->attr->default_gw; | |
958 | } | |
959 | ||
c85c03c7 | 960 | |
961 | /* | |
962 | * Return true if the local ri for this rn has sticky set | |
963 | */ | |
d62a17ae | 964 | static int evpn_route_is_sticky(struct bgp *bgp, struct bgp_node *rn) |
c85c03c7 | 965 | { |
d62a17ae | 966 | struct bgp_info *tmp_ri; |
967 | struct bgp_info *local_ri; | |
c85c03c7 | 968 | |
d62a17ae | 969 | local_ri = NULL; |
970 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) { | |
971 | if (tmp_ri->peer == bgp->peer_self | |
972 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
973 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
974 | local_ri = tmp_ri; | |
975 | } | |
c85c03c7 | 976 | |
d62a17ae | 977 | if (!local_ri) |
978 | return 0; | |
c85c03c7 | 979 | |
d62a17ae | 980 | return local_ri->attr->sticky; |
c85c03c7 | 981 | } |
982 | ||
342dd0c6 | 983 | static int update_evpn_type5_route_entry(struct bgp *bgp_def, |
984 | struct bgp *bgp_vrf, afi_t afi, | |
985 | safi_t safi, struct bgp_node *rn, | |
5424b7ba | 986 | struct attr *attr, int *route_changed) |
342dd0c6 | 987 | { |
988 | struct attr *attr_new = NULL; | |
989 | struct bgp_info *ri = NULL; | |
990 | mpls_label_t label = MPLS_INVALID_LABEL; | |
991 | struct bgp_info *local_ri = NULL; | |
992 | struct bgp_info *tmp_ri = NULL; | |
993 | ||
5424b7ba | 994 | *route_changed = 0; |
342dd0c6 | 995 | /* locate the local route entry if any */ |
996 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) { | |
997 | if (tmp_ri->peer == bgp_def->peer_self | |
998 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
999 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
1000 | local_ri = tmp_ri; | |
1001 | } | |
1002 | ||
1003 | /* create a new route entry if one doesnt exist. | |
523cafc4 | 1004 | Otherwise see if route attr has changed |
1005 | */ | |
342dd0c6 | 1006 | if (!local_ri) { |
1007 | ||
5424b7ba MK |
1008 | /* route has changed as this is the first entry */ |
1009 | *route_changed = 1; | |
1010 | ||
342dd0c6 | 1011 | /* Add (or update) attribute to hash. */ |
1012 | attr_new = bgp_attr_intern(attr); | |
1013 | ||
1014 | /* create the route info from attribute */ | |
1015 | ri = info_make(ZEBRA_ROUTE_BGP, BGP_ROUTE_STATIC, 0, | |
1016 | bgp_def->peer_self, attr_new, rn); | |
1017 | SET_FLAG(ri->flags, BGP_INFO_VALID); | |
1018 | ||
b57ba6d2 | 1019 | /* Type-5 routes advertise the L3-VNI */ |
342dd0c6 | 1020 | bgp_info_extra_get(ri); |
1021 | vni2label(bgp_vrf->l3vni, &label); | |
b57ba6d2 MK |
1022 | memcpy(&ri->extra->label, &label, sizeof(label)); |
1023 | ri->extra->num_labels = 1; | |
342dd0c6 | 1024 | |
1025 | /* add the route entry to route node*/ | |
1026 | bgp_info_add(rn, ri); | |
1027 | } else { | |
1028 | ||
1029 | tmp_ri = local_ri; | |
1030 | if (!attrhash_cmp(tmp_ri->attr, attr)) { | |
5424b7ba MK |
1031 | |
1032 | /* attribute changed */ | |
1033 | *route_changed = 1; | |
1034 | ||
342dd0c6 | 1035 | /* The attribute has changed. */ |
1036 | /* Add (or update) attribute to hash. */ | |
1037 | attr_new = bgp_attr_intern(attr); | |
1038 | bgp_info_set_flag(rn, tmp_ri, BGP_INFO_ATTR_CHANGED); | |
1039 | ||
1040 | /* Restore route, if needed. */ | |
1041 | if (CHECK_FLAG(tmp_ri->flags, BGP_INFO_REMOVED)) | |
1042 | bgp_info_restore(rn, tmp_ri); | |
1043 | ||
1044 | /* Unintern existing, set to new. */ | |
1045 | bgp_attr_unintern(&tmp_ri->attr); | |
1046 | tmp_ri->attr = attr_new; | |
1047 | tmp_ri->uptime = bgp_clock(); | |
1048 | } | |
1049 | } | |
1050 | return 0; | |
1051 | } | |
1052 | ||
1053 | /* update evpn type-5 route entry */ | |
996c9314 LB |
1054 | static int update_evpn_type5_route(struct bgp *bgp_vrf, struct prefix_evpn *evp, |
1055 | struct attr *src_attr) | |
342dd0c6 | 1056 | { |
1057 | afi_t afi = AFI_L2VPN; | |
1058 | safi_t safi = SAFI_EVPN; | |
1059 | struct attr attr; | |
1060 | struct bgp_node *rn = NULL; | |
1061 | struct bgp *bgp_def = NULL; | |
5424b7ba | 1062 | int route_changed = 0; |
342dd0c6 | 1063 | |
1064 | bgp_def = bgp_get_default(); | |
1065 | if (!bgp_def) | |
faafdfa8 | 1066 | return 0; |
342dd0c6 | 1067 | |
2f69f6d3 | 1068 | /* Build path attribute for this route - use the source attr, if |
1069 | * present, else treat as locally originated. | |
1070 | */ | |
1071 | if (src_attr) | |
1072 | bgp_attr_dup(&attr, src_attr); | |
1073 | else { | |
1074 | memset(&attr, 0, sizeof(struct attr)); | |
1075 | bgp_attr_default_set(&attr, BGP_ORIGIN_IGP); | |
1076 | } | |
1077 | /* Set nexthop to ourselves and fill in the Router MAC. */ | |
342dd0c6 | 1078 | attr.nexthop = bgp_vrf->originator_ip; |
1079 | attr.mp_nexthop_global_in = bgp_vrf->originator_ip; | |
1080 | attr.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
1081 | memcpy(&attr.rmac, &bgp_vrf->rmac, sizeof(struct ethaddr)); | |
1082 | ||
1083 | /* Setup RT and encap extended community */ | |
1084 | build_evpn_type5_route_extcomm(bgp_vrf, &attr); | |
1085 | ||
1086 | /* get the route node in global table */ | |
1087 | rn = bgp_afi_node_get(bgp_def->rib[afi][safi], afi, safi, | |
996c9314 | 1088 | (struct prefix *)evp, &bgp_vrf->vrf_prd); |
342dd0c6 | 1089 | assert(rn); |
1090 | ||
1091 | /* create or update the route entry within the route node */ | |
996c9314 LB |
1092 | update_evpn_type5_route_entry(bgp_def, bgp_vrf, afi, safi, rn, &attr, |
1093 | &route_changed); | |
342dd0c6 | 1094 | |
1095 | /* schedule for processing and unlock node */ | |
5424b7ba MK |
1096 | if (route_changed) { |
1097 | bgp_process(bgp_def, rn, afi, safi); | |
1098 | bgp_unlock_node(rn); | |
1099 | } | |
342dd0c6 | 1100 | |
1101 | /* uninten temporary */ | |
5ee65f6f | 1102 | if (!src_attr) |
1103 | aspath_unintern(&attr.aspath); | |
342dd0c6 | 1104 | return 0; |
1105 | } | |
1106 | ||
128ea8ab | 1107 | /* |
1108 | * Create or update EVPN route entry. This could be in the VNI route table | |
1109 | * or the global route table. | |
1110 | */ | |
d62a17ae | 1111 | static int update_evpn_route_entry(struct bgp *bgp, struct bgpevpn *vpn, |
1112 | afi_t afi, safi_t safi, struct bgp_node *rn, | |
1113 | struct attr *attr, int add, int vni_table, | |
1a98c087 | 1114 | struct bgp_info **ri, u_char flags) |
d62a17ae | 1115 | { |
1116 | struct bgp_info *tmp_ri; | |
1117 | struct bgp_info *local_ri, *remote_ri; | |
1118 | struct attr *attr_new; | |
b57ba6d2 MK |
1119 | mpls_label_t label[BGP_MAX_LABELS]; |
1120 | u_int32_t num_labels = 1; | |
d62a17ae | 1121 | int route_change = 1; |
1122 | u_char sticky = 0; | |
b57ba6d2 | 1123 | struct prefix_evpn *evp; |
d62a17ae | 1124 | |
1125 | *ri = NULL; | |
b57ba6d2 MK |
1126 | evp = (struct prefix_evpn *)&rn->p; |
1127 | memset(&label, 0, sizeof(label)); | |
d62a17ae | 1128 | |
1129 | /* See if this is an update of an existing route, or a new add. Also, | |
1130 | * identify if already known from remote, and if so, the one with the | |
1131 | * highest sequence number; this is only when adding to the VNI routing | |
1132 | * table. | |
1133 | */ | |
1134 | local_ri = remote_ri = NULL; | |
1135 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) { | |
1136 | if (tmp_ri->peer == bgp->peer_self | |
1137 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
1138 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
1139 | local_ri = tmp_ri; | |
1140 | if (vni_table) { | |
1141 | if (tmp_ri->type == ZEBRA_ROUTE_BGP | |
90f4f482 | 1142 | && tmp_ri->sub_type == BGP_ROUTE_IMPORTED |
d62a17ae | 1143 | && CHECK_FLAG(tmp_ri->flags, BGP_INFO_VALID)) { |
1144 | if (!remote_ri) | |
1145 | remote_ri = tmp_ri; | |
1146 | else if (mac_mobility_seqnum(tmp_ri->attr) | |
1147 | > mac_mobility_seqnum(remote_ri->attr)) | |
1148 | remote_ri = tmp_ri; | |
1149 | } | |
1150 | } | |
1151 | } | |
1152 | ||
1153 | /* If route doesn't exist already, create a new one, if told to. | |
1154 | * Otherwise act based on whether the attributes of the route have | |
1155 | * changed or not. | |
1156 | */ | |
1157 | if (!local_ri && !add) | |
1158 | return 0; | |
1159 | ||
1160 | if (!local_ri) { | |
1161 | /* When learnt locally for the first time but already known from | |
1162 | * remote, we have to initiate appropriate MAC mobility steps. | |
1163 | * This | |
1164 | * is applicable when updating the VNI routing table. | |
1a98c087 MK |
1165 | * We need to skip mobility steps for g/w macs (local mac on g/w |
1166 | * SVI) advertised in EVPN. | |
1167 | * This will ensure that local routes are preferred for g/w macs | |
d62a17ae | 1168 | */ |
ead40654 | 1169 | if (remote_ri && !CHECK_FLAG(flags, ZEBRA_MACIP_TYPE_GW)) { |
d62a17ae | 1170 | u_int32_t cur_seqnum; |
1171 | ||
1172 | /* Add MM extended community to route. */ | |
1173 | cur_seqnum = mac_mobility_seqnum(remote_ri->attr); | |
1174 | add_mac_mobility_to_attr(cur_seqnum + 1, attr); | |
1175 | } | |
1176 | ||
1177 | /* Add (or update) attribute to hash. */ | |
1178 | attr_new = bgp_attr_intern(attr); | |
1179 | ||
1180 | /* Extract MAC mobility sequence number, if any. */ | |
1181 | attr_new->mm_seqnum = | |
1182 | bgp_attr_mac_mobility_seqnum(attr_new, &sticky); | |
1183 | attr_new->sticky = sticky; | |
1184 | ||
1185 | /* Create new route with its attribute. */ | |
1186 | tmp_ri = info_make(ZEBRA_ROUTE_BGP, BGP_ROUTE_STATIC, 0, | |
1187 | bgp->peer_self, attr_new, rn); | |
1188 | SET_FLAG(tmp_ri->flags, BGP_INFO_VALID); | |
1189 | bgp_info_extra_get(tmp_ri); | |
1190 | ||
1191 | /* The VNI goes into the 'label' field of the route */ | |
b57ba6d2 | 1192 | vni2label(vpn->vni, &label[0]); |
c48d9f5f MK |
1193 | |
1194 | /* Type-2 routes may carry a second VNI - the L3-VNI. | |
1195 | * Only attach second label if we are advertising two labels for | |
1196 | * type-2 routes. | |
1197 | */ | |
996c9314 LB |
1198 | if (evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE |
1199 | && CHECK_FLAG(vpn->flags, VNI_FLAG_USE_TWO_LABELS)) { | |
b57ba6d2 MK |
1200 | vni_t l3vni; |
1201 | ||
1202 | l3vni = bgpevpn_get_l3vni(vpn); | |
1203 | if (l3vni) { | |
1204 | vni2label(l3vni, &label[1]); | |
1205 | num_labels++; | |
1206 | } | |
1207 | } | |
d62a17ae | 1208 | |
b57ba6d2 MK |
1209 | memcpy(&tmp_ri->extra->label, label, sizeof(label)); |
1210 | tmp_ri->extra->num_labels = num_labels; | |
d62a17ae | 1211 | bgp_info_add(rn, tmp_ri); |
1212 | } else { | |
1213 | tmp_ri = local_ri; | |
1214 | if (attrhash_cmp(tmp_ri->attr, attr) | |
1215 | && !CHECK_FLAG(tmp_ri->flags, BGP_INFO_REMOVED)) | |
1216 | route_change = 0; | |
1217 | else { | |
c48d9f5f MK |
1218 | /* |
1219 | * The attributes have changed, type-2 routes needs to | |
1220 | * be advertised with right labels. | |
1221 | */ | |
1222 | vni2label(vpn->vni, &label[0]); | |
996c9314 LB |
1223 | if (evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE |
1224 | && CHECK_FLAG(vpn->flags, | |
1225 | VNI_FLAG_USE_TWO_LABELS)) { | |
c48d9f5f MK |
1226 | vni_t l3vni; |
1227 | ||
1228 | l3vni = bgpevpn_get_l3vni(vpn); | |
1229 | if (l3vni) { | |
1230 | vni2label(l3vni, &label[1]); | |
1231 | num_labels++; | |
1232 | } | |
1233 | } | |
1234 | memcpy(&tmp_ri->extra->label, label, sizeof(label)); | |
1235 | tmp_ri->extra->num_labels = num_labels; | |
1236 | ||
d62a17ae | 1237 | /* The attribute has changed. */ |
1238 | /* Add (or update) attribute to hash. */ | |
1239 | attr_new = bgp_attr_intern(attr); | |
1240 | bgp_info_set_flag(rn, tmp_ri, BGP_INFO_ATTR_CHANGED); | |
1241 | ||
1242 | /* Restore route, if needed. */ | |
1243 | if (CHECK_FLAG(tmp_ri->flags, BGP_INFO_REMOVED)) | |
1244 | bgp_info_restore(rn, tmp_ri); | |
1245 | ||
1246 | /* Unintern existing, set to new. */ | |
1247 | bgp_attr_unintern(&tmp_ri->attr); | |
1248 | tmp_ri->attr = attr_new; | |
1249 | tmp_ri->uptime = bgp_clock(); | |
1250 | } | |
1251 | } | |
1252 | ||
1253 | /* Return back the route entry. */ | |
1254 | *ri = tmp_ri; | |
1255 | return route_change; | |
128ea8ab | 1256 | } |
1257 | ||
1258 | /* | |
1259 | * Create or update EVPN route (of type based on prefix) for specified VNI | |
1260 | * and schedule for processing. | |
1261 | */ | |
d62a17ae | 1262 | static int update_evpn_route(struct bgp *bgp, struct bgpevpn *vpn, |
1a98c087 | 1263 | struct prefix_evpn *p, u_char flags) |
128ea8ab | 1264 | { |
d62a17ae | 1265 | struct bgp_node *rn; |
1266 | struct attr attr; | |
1267 | struct attr *attr_new; | |
1ec31309 | 1268 | int add_l3_ecomm = 0; |
d62a17ae | 1269 | struct bgp_info *ri; |
1270 | afi_t afi = AFI_L2VPN; | |
1271 | safi_t safi = SAFI_EVPN; | |
1272 | int route_change; | |
128ea8ab | 1273 | |
d62a17ae | 1274 | memset(&attr, 0, sizeof(struct attr)); |
128ea8ab | 1275 | |
d62a17ae | 1276 | /* Build path-attribute for this route. */ |
1277 | bgp_attr_default_set(&attr, BGP_ORIGIN_IGP); | |
1278 | attr.nexthop = vpn->originator_ip; | |
1279 | attr.mp_nexthop_global_in = vpn->originator_ip; | |
1280 | attr.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
317f1fe0 | 1281 | attr.sticky = CHECK_FLAG(flags, ZEBRA_MACIP_TYPE_STICKY) ? 1 : 0; |
ead40654 | 1282 | attr.default_gw = CHECK_FLAG(flags, ZEBRA_MACIP_TYPE_GW) ? 1 : 0; |
be41eb68 MK |
1283 | |
1284 | /* PMSI is only needed for type-3 routes */ | |
1285 | if (p->prefix.route_type == BGP_EVPN_IMET_ROUTE) | |
1286 | attr.flag |= ATTR_FLAG_BIT(BGP_ATTR_PMSI_TUNNEL); | |
1287 | ||
1ec31309 | 1288 | /* router mac is only needed for type-2 routes here. */ |
be41eb68 MK |
1289 | if (p->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) |
1290 | bgpevpn_get_rmac(vpn, &attr.rmac); | |
a21bd7a3 | 1291 | vni2label(vpn->vni, &(attr.label)); |
128ea8ab | 1292 | |
1ec31309 | 1293 | /* Include L3 VNI related RTs and RMAC for type-2 routes, if they're |
1294 | * IPv4 or IPv6 global addresses and we're advertising L3VNI with | |
1295 | * these routes. | |
1296 | */ | |
1297 | if (p->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE && | |
1298 | (IS_EVPN_PREFIX_IPADDR_V4(p) || | |
1299 | !IN6_IS_ADDR_LINKLOCAL(&p->prefix.ip.ipaddr_v6)) && | |
1300 | CHECK_FLAG(vpn->flags, VNI_FLAG_USE_TWO_LABELS)) | |
1301 | add_l3_ecomm = 1; | |
1302 | ||
1303 | /* Set up extended community. */ | |
1304 | build_evpn_route_extcomm(vpn, &attr, add_l3_ecomm); | |
128ea8ab | 1305 | |
d62a17ae | 1306 | /* First, create (or fetch) route node within the VNI. */ |
1307 | /* NOTE: There is no RD here. */ | |
1308 | rn = bgp_node_get(vpn->route_table, (struct prefix *)p); | |
128ea8ab | 1309 | |
d62a17ae | 1310 | /* Create or update route entry. */ |
1311 | route_change = update_evpn_route_entry(bgp, vpn, afi, safi, rn, &attr, | |
1a98c087 | 1312 | 1, 1, &ri, flags); |
d62a17ae | 1313 | assert(ri); |
1314 | attr_new = ri->attr; | |
128ea8ab | 1315 | |
d62a17ae | 1316 | /* Perform route selection; this is just to set the flags correctly |
1317 | * as local route in the VNI always wins. | |
1318 | */ | |
1319 | evpn_route_select_install(bgp, vpn, rn); | |
1320 | bgp_unlock_node(rn); | |
128ea8ab | 1321 | |
d62a17ae | 1322 | /* If this is a new route or some attribute has changed, export the |
1323 | * route to the global table. The route will be advertised to peers | |
1324 | * from there. Note that this table is a 2-level tree (RD-level + | |
1325 | * Prefix-level) similar to L3VPN routes. | |
1326 | */ | |
1327 | if (route_change) { | |
1328 | struct bgp_info *global_ri; | |
128ea8ab | 1329 | |
d62a17ae | 1330 | rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, |
1331 | (struct prefix *)p, &vpn->prd); | |
1332 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, attr_new, 1, 0, | |
1a98c087 | 1333 | &global_ri, flags); |
128ea8ab | 1334 | |
d62a17ae | 1335 | /* Schedule for processing and unlock node. */ |
1336 | bgp_process(bgp, rn, afi, safi); | |
1337 | bgp_unlock_node(rn); | |
1338 | } | |
128ea8ab | 1339 | |
d62a17ae | 1340 | /* Unintern temporary. */ |
1341 | aspath_unintern(&attr.aspath); | |
128ea8ab | 1342 | |
d62a17ae | 1343 | return 0; |
128ea8ab | 1344 | } |
1345 | ||
342dd0c6 | 1346 | /* Delete EVPN type5 route entry from global table */ |
1347 | static void delete_evpn_type5_route_entry(struct bgp *bgp_def, | |
996c9314 LB |
1348 | struct bgp *bgp_vrf, afi_t afi, |
1349 | safi_t safi, struct bgp_node *rn, | |
342dd0c6 | 1350 | struct bgp_info **ri) |
1351 | { | |
1352 | struct bgp_info *tmp_ri = NULL; | |
1353 | ||
1354 | *ri = NULL; | |
1355 | ||
1356 | /* find the matching route entry */ | |
1357 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) | |
1358 | if (tmp_ri->peer == bgp_def->peer_self | |
1359 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
1360 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
1361 | break; | |
1362 | ||
1363 | *ri = tmp_ri; | |
1364 | ||
1365 | /* Mark route for delete. */ | |
1366 | if (tmp_ri) | |
1367 | bgp_info_delete(rn, tmp_ri); | |
1368 | } | |
1369 | ||
1370 | /* Delete EVPN type5 route */ | |
996c9314 | 1371 | static int delete_evpn_type5_route(struct bgp *bgp_vrf, struct prefix_evpn *evp) |
342dd0c6 | 1372 | { |
1373 | afi_t afi = AFI_L2VPN; | |
1374 | safi_t safi = SAFI_EVPN; | |
1375 | struct bgp_node *rn = NULL; | |
1376 | struct bgp_info *ri = NULL; | |
1377 | struct bgp *bgp_def = NULL; /* default bgp instance */ | |
1378 | ||
1379 | bgp_def = bgp_get_default(); | |
1380 | if (!bgp_def) | |
faafdfa8 | 1381 | return 0; |
342dd0c6 | 1382 | |
1383 | /* locate the global route entry for this type-5 prefix */ | |
1384 | rn = bgp_afi_node_lookup(bgp_def->rib[afi][safi], afi, safi, | |
1385 | (struct prefix *)evp, &bgp_vrf->vrf_prd); | |
1386 | if (!rn) | |
1387 | return 0; | |
1388 | ||
1389 | delete_evpn_type5_route_entry(bgp_def, bgp_vrf, afi, safi, rn, &ri); | |
1390 | if (ri) | |
1391 | bgp_process(bgp_def, rn, afi, safi); | |
1392 | bgp_unlock_node(rn); | |
1393 | return 0; | |
1394 | } | |
1395 | ||
128ea8ab | 1396 | /* |
1397 | * Delete EVPN route entry. This could be in the VNI route table | |
1398 | * or the global route table. | |
1399 | */ | |
d62a17ae | 1400 | static void delete_evpn_route_entry(struct bgp *bgp, struct bgpevpn *vpn, |
1401 | afi_t afi, safi_t safi, struct bgp_node *rn, | |
1402 | struct bgp_info **ri) | |
128ea8ab | 1403 | { |
d62a17ae | 1404 | struct bgp_info *tmp_ri; |
128ea8ab | 1405 | |
d62a17ae | 1406 | *ri = NULL; |
128ea8ab | 1407 | |
d62a17ae | 1408 | /* Now, find matching route. */ |
1409 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) | |
1410 | if (tmp_ri->peer == bgp->peer_self | |
1411 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
1412 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
1413 | break; | |
128ea8ab | 1414 | |
d62a17ae | 1415 | *ri = tmp_ri; |
128ea8ab | 1416 | |
d62a17ae | 1417 | /* Mark route for delete. */ |
1418 | if (tmp_ri) | |
1419 | bgp_info_delete(rn, tmp_ri); | |
128ea8ab | 1420 | } |
1421 | ||
1422 | /* | |
1423 | * Delete EVPN route (of type based on prefix) for specified VNI and | |
1424 | * schedule for processing. | |
1425 | */ | |
d62a17ae | 1426 | static int delete_evpn_route(struct bgp *bgp, struct bgpevpn *vpn, |
1427 | struct prefix_evpn *p) | |
1428 | { | |
1429 | struct bgp_node *rn, *global_rn; | |
1430 | struct bgp_info *ri; | |
1431 | afi_t afi = AFI_L2VPN; | |
1432 | safi_t safi = SAFI_EVPN; | |
1433 | ||
1434 | /* First, locate the route node within the VNI. If it doesn't exist, | |
1435 | * there | |
1436 | * is nothing further to do. | |
1437 | */ | |
1438 | /* NOTE: There is no RD here. */ | |
1439 | rn = bgp_node_lookup(vpn->route_table, (struct prefix *)p); | |
1440 | if (!rn) | |
1441 | return 0; | |
1442 | ||
1443 | /* Next, locate route node in the global EVPN routing table. Note that | |
1444 | * this table is a 2-level tree (RD-level + Prefix-level) similar to | |
1445 | * L3VPN routes. | |
1446 | */ | |
1447 | global_rn = bgp_afi_node_lookup(bgp->rib[afi][safi], afi, safi, | |
1448 | (struct prefix *)p, &vpn->prd); | |
1449 | if (global_rn) { | |
1450 | /* Delete route entry in the global EVPN table. */ | |
1451 | delete_evpn_route_entry(bgp, vpn, afi, safi, global_rn, &ri); | |
1452 | ||
1453 | /* Schedule for processing - withdraws to peers happen from | |
1454 | * this table. | |
1455 | */ | |
1456 | if (ri) | |
1457 | bgp_process(bgp, global_rn, afi, safi); | |
1458 | bgp_unlock_node(global_rn); | |
1459 | } | |
1460 | ||
1461 | /* Delete route entry in the VNI route table. This can just be removed. | |
1462 | */ | |
1463 | delete_evpn_route_entry(bgp, vpn, afi, safi, rn, &ri); | |
1464 | if (ri) | |
1465 | bgp_info_reap(rn, ri); | |
1466 | bgp_unlock_node(rn); | |
1467 | ||
1468 | return 0; | |
128ea8ab | 1469 | } |
1470 | ||
1471 | /* | |
1472 | * Update all type-2 (MACIP) local routes for this VNI - these should also | |
1473 | * be scheduled for advertise to peers. | |
1474 | */ | |
d62a17ae | 1475 | static int update_all_type2_routes(struct bgp *bgp, struct bgpevpn *vpn) |
1476 | { | |
1477 | afi_t afi; | |
1478 | safi_t safi; | |
1479 | struct bgp_node *rn; | |
1480 | struct bgp_info *ri; | |
1481 | struct attr attr; | |
1482 | struct attr attr_sticky; | |
ead40654 | 1483 | struct attr attr_def_gw; |
1ec31309 | 1484 | struct attr attr_ip6_ll; |
d62a17ae | 1485 | struct attr *attr_new; |
1ec31309 | 1486 | int add_l3_ecomm = 0; |
d62a17ae | 1487 | |
1488 | afi = AFI_L2VPN; | |
1489 | safi = SAFI_EVPN; | |
1490 | memset(&attr, 0, sizeof(struct attr)); | |
1491 | memset(&attr_sticky, 0, sizeof(struct attr)); | |
ead40654 | 1492 | memset(&attr_def_gw, 0, sizeof(struct attr)); |
1ec31309 | 1493 | memset(&attr_ip6_ll, 0, sizeof(struct attr)); |
d62a17ae | 1494 | |
1ec31309 | 1495 | /* Build path-attribute - multiple type-2 routes for this VNI will share |
1496 | * the same path attribute, but we need separate structures for sticky | |
1497 | * MACs, default gateway and IPv6 link-local addresses (no L3 RT/RMAC). | |
d62a17ae | 1498 | */ |
1499 | bgp_attr_default_set(&attr, BGP_ORIGIN_IGP); | |
1500 | bgp_attr_default_set(&attr_sticky, BGP_ORIGIN_IGP); | |
ead40654 | 1501 | bgp_attr_default_set(&attr_def_gw, BGP_ORIGIN_IGP); |
d62a17ae | 1502 | attr.nexthop = vpn->originator_ip; |
1503 | attr.mp_nexthop_global_in = vpn->originator_ip; | |
1504 | attr.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
bc59a672 | 1505 | bgpevpn_get_rmac(vpn, &attr.rmac); |
d62a17ae | 1506 | attr_sticky.nexthop = vpn->originator_ip; |
1507 | attr_sticky.mp_nexthop_global_in = vpn->originator_ip; | |
1508 | attr_sticky.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
1509 | attr_sticky.sticky = 1; | |
bc59a672 | 1510 | bgpevpn_get_rmac(vpn, &attr_sticky.rmac); |
ead40654 MK |
1511 | attr_def_gw.nexthop = vpn->originator_ip; |
1512 | attr_def_gw.mp_nexthop_global_in = vpn->originator_ip; | |
1513 | attr_def_gw.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
1514 | attr_def_gw.default_gw = 1; | |
1515 | bgpevpn_get_rmac(vpn, &attr_def_gw.rmac); | |
1ec31309 | 1516 | bgp_attr_default_set(&attr_ip6_ll, BGP_ORIGIN_IGP); |
1517 | attr_ip6_ll.nexthop = vpn->originator_ip; | |
1518 | attr_ip6_ll.mp_nexthop_global_in = vpn->originator_ip; | |
1519 | attr_ip6_ll.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
1520 | ||
1521 | /* Add L3 VNI RTs and RMAC for non IPv6 link-local attributes if | |
1522 | * using L3 VNI for type-2 routes also. | |
1523 | */ | |
1524 | if (CHECK_FLAG(vpn->flags, VNI_FLAG_USE_TWO_LABELS)) | |
1525 | add_l3_ecomm = 1; | |
1526 | ||
1527 | build_evpn_route_extcomm(vpn, &attr, add_l3_ecomm); | |
1528 | build_evpn_route_extcomm(vpn, &attr_sticky, add_l3_ecomm); | |
1529 | build_evpn_route_extcomm(vpn, &attr_def_gw, add_l3_ecomm); | |
1530 | build_evpn_route_extcomm(vpn, &attr_ip6_ll, 0); | |
d62a17ae | 1531 | |
1532 | /* Walk this VNI's route table and update local type-2 routes. For any | |
1533 | * routes updated, update corresponding entry in the global table too. | |
1534 | */ | |
1535 | for (rn = bgp_table_top(vpn->route_table); rn; | |
1536 | rn = bgp_route_next(rn)) { | |
1537 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
1538 | struct bgp_node *rd_rn; | |
1539 | struct bgp_info *global_ri; | |
1540 | ||
1541 | if (evp->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE) | |
1542 | continue; | |
1543 | ||
1ec31309 | 1544 | if (IS_EVPN_PREFIX_IPADDR_V6(evp) && |
1545 | IN6_IS_ADDR_LINKLOCAL(&evp->prefix.ip.ipaddr_v6)) | |
1546 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, | |
1547 | &attr_ip6_ll, 0, 1, &ri, 0); | |
1548 | else { | |
7ec156a9 MK |
1549 | if (evpn_route_is_sticky(bgp, rn)) |
1550 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, | |
996c9314 LB |
1551 | &attr_sticky, 0, 1, &ri, |
1552 | 0); | |
ead40654 MK |
1553 | else if (evpn_route_is_def_gw(bgp, rn)) |
1554 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, | |
996c9314 LB |
1555 | &attr_def_gw, 0, 1, &ri, |
1556 | 0); | |
7ec156a9 MK |
1557 | else |
1558 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, | |
1559 | &attr, 0, 1, &ri, 0); | |
7ec156a9 | 1560 | } |
d62a17ae | 1561 | |
1562 | /* If a local route exists for this prefix, we need to update | |
1563 | * the global routing table too. | |
1564 | */ | |
1565 | if (!ri) | |
1566 | continue; | |
1567 | ||
1568 | /* Perform route selection; this is just to set the flags | |
1569 | * correctly | |
1570 | * as local route in the VNI always wins. | |
1571 | */ | |
1572 | evpn_route_select_install(bgp, vpn, rn); | |
1573 | ||
1574 | attr_new = ri->attr; | |
1575 | ||
1576 | /* Update route in global routing table. */ | |
1577 | rd_rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, | |
1578 | (struct prefix *)evp, &vpn->prd); | |
1579 | assert(rd_rn); | |
1580 | update_evpn_route_entry(bgp, vpn, afi, safi, rd_rn, attr_new, 0, | |
1a98c087 | 1581 | 0, &global_ri, 0); |
d62a17ae | 1582 | |
1583 | /* Schedule for processing and unlock node. */ | |
1584 | bgp_process(bgp, rd_rn, afi, safi); | |
1585 | bgp_unlock_node(rd_rn); | |
1586 | } | |
1587 | ||
1588 | /* Unintern temporary. */ | |
1589 | aspath_unintern(&attr.aspath); | |
1590 | aspath_unintern(&attr_sticky.aspath); | |
ead40654 | 1591 | aspath_unintern(&attr_def_gw.aspath); |
1ec31309 | 1592 | aspath_unintern(&attr_ip6_ll.aspath); |
d62a17ae | 1593 | |
1594 | return 0; | |
128ea8ab | 1595 | } |
1596 | ||
1597 | /* | |
1598 | * Delete all type-2 (MACIP) local routes for this VNI - only from the | |
1599 | * global routing table. These are also scheduled for withdraw from peers. | |
1600 | */ | |
d62a17ae | 1601 | static int delete_global_type2_routes(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1602 | { |
d62a17ae | 1603 | afi_t afi; |
1604 | safi_t safi; | |
1605 | struct bgp_node *rdrn, *rn; | |
1606 | struct bgp_table *table; | |
1607 | struct bgp_info *ri; | |
128ea8ab | 1608 | |
d62a17ae | 1609 | afi = AFI_L2VPN; |
1610 | safi = SAFI_EVPN; | |
128ea8ab | 1611 | |
d62a17ae | 1612 | rdrn = bgp_node_lookup(bgp->rib[afi][safi], (struct prefix *)&vpn->prd); |
1613 | if (rdrn && rdrn->info) { | |
1614 | table = (struct bgp_table *)rdrn->info; | |
1615 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) { | |
1616 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
128ea8ab | 1617 | |
d62a17ae | 1618 | if (evp->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE) |
1619 | continue; | |
128ea8ab | 1620 | |
d62a17ae | 1621 | delete_evpn_route_entry(bgp, vpn, afi, safi, rn, &ri); |
1622 | if (ri) | |
1623 | bgp_process(bgp, rn, afi, safi); | |
1624 | } | |
1625 | } | |
128ea8ab | 1626 | |
d62a17ae | 1627 | /* Unlock RD node. */ |
1628 | if (rdrn) | |
1629 | bgp_unlock_node(rdrn); | |
128ea8ab | 1630 | |
d62a17ae | 1631 | return 0; |
128ea8ab | 1632 | } |
1633 | ||
1634 | /* | |
1635 | * Delete all type-2 (MACIP) local routes for this VNI - from the global | |
1636 | * table as well as the per-VNI route table. | |
1637 | */ | |
d62a17ae | 1638 | static int delete_all_type2_routes(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1639 | { |
d62a17ae | 1640 | afi_t afi; |
1641 | safi_t safi; | |
1642 | struct bgp_node *rn; | |
1643 | struct bgp_info *ri; | |
128ea8ab | 1644 | |
d62a17ae | 1645 | afi = AFI_L2VPN; |
1646 | safi = SAFI_EVPN; | |
128ea8ab | 1647 | |
d62a17ae | 1648 | /* First, walk the global route table for this VNI's type-2 local |
1649 | * routes. | |
1650 | * EVPN routes are a 2-level table, first get the RD table. | |
1651 | */ | |
1652 | delete_global_type2_routes(bgp, vpn); | |
128ea8ab | 1653 | |
d62a17ae | 1654 | /* Next, walk this VNI's route table and delete local type-2 routes. */ |
1655 | for (rn = bgp_table_top(vpn->route_table); rn; | |
1656 | rn = bgp_route_next(rn)) { | |
1657 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
128ea8ab | 1658 | |
d62a17ae | 1659 | if (evp->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE) |
1660 | continue; | |
128ea8ab | 1661 | |
d62a17ae | 1662 | delete_evpn_route_entry(bgp, vpn, afi, safi, rn, &ri); |
128ea8ab | 1663 | |
d62a17ae | 1664 | /* Route entry in local table gets deleted immediately. */ |
1665 | if (ri) | |
1666 | bgp_info_reap(rn, ri); | |
1667 | } | |
128ea8ab | 1668 | |
d62a17ae | 1669 | return 0; |
128ea8ab | 1670 | } |
1671 | ||
1672 | /* | |
1673 | * Delete all routes in the per-VNI route table. | |
1674 | */ | |
d62a17ae | 1675 | static int delete_all_vni_routes(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1676 | { |
d62a17ae | 1677 | struct bgp_node *rn; |
1678 | struct bgp_info *ri, *nextri; | |
128ea8ab | 1679 | |
d62a17ae | 1680 | /* Walk this VNI's route table and delete all routes. */ |
1681 | for (rn = bgp_table_top(vpn->route_table); rn; | |
1682 | rn = bgp_route_next(rn)) { | |
1683 | for (ri = rn->info; (ri != NULL) && (nextri = ri->next, 1); | |
1684 | ri = nextri) { | |
1685 | bgp_info_delete(rn, ri); | |
1686 | bgp_info_reap(rn, ri); | |
1687 | } | |
1688 | } | |
128ea8ab | 1689 | |
d62a17ae | 1690 | return 0; |
128ea8ab | 1691 | } |
1692 | ||
1693 | /* | |
1694 | * Update (and advertise) local routes for a VNI. Invoked upon the VNI | |
1695 | * export RT getting modified or change to tunnel IP. Note that these | |
1696 | * situations need the route in the per-VNI table as well as the global | |
1697 | * table to be updated (as attributes change). | |
1698 | */ | |
d62a17ae | 1699 | static int update_routes_for_vni(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1700 | { |
d62a17ae | 1701 | int ret; |
1702 | struct prefix_evpn p; | |
128ea8ab | 1703 | |
d62a17ae | 1704 | /* Update and advertise the type-3 route (only one) followed by the |
1705 | * locally learnt type-2 routes (MACIP) - for this VNI. | |
1706 | */ | |
1707 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
1708 | ret = update_evpn_route(bgp, vpn, &p, 0); | |
1709 | if (ret) | |
1710 | return ret; | |
128ea8ab | 1711 | |
d62a17ae | 1712 | return update_all_type2_routes(bgp, vpn); |
128ea8ab | 1713 | } |
1714 | ||
1715 | /* | |
1716 | * Delete (and withdraw) local routes for specified VNI from the global | |
1717 | * table and per-VNI table. After this, remove all other routes from | |
1718 | * the per-VNI table. Invoked upon the VNI being deleted or EVPN | |
1719 | * (advertise-all-vni) being disabled. | |
1720 | */ | |
d62a17ae | 1721 | static int delete_routes_for_vni(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1722 | { |
d62a17ae | 1723 | int ret; |
1724 | struct prefix_evpn p; | |
128ea8ab | 1725 | |
d62a17ae | 1726 | /* Delete and withdraw locally learnt type-2 routes (MACIP) |
1727 | * followed by type-3 routes (only one) - for this VNI. | |
1728 | */ | |
1729 | ret = delete_all_type2_routes(bgp, vpn); | |
1730 | if (ret) | |
1731 | return ret; | |
128ea8ab | 1732 | |
d62a17ae | 1733 | build_evpn_type3_prefix(&p, vpn->originator_ip); |
1734 | ret = delete_evpn_route(bgp, vpn, &p); | |
1735 | if (ret) | |
1736 | return ret; | |
128ea8ab | 1737 | |
d62a17ae | 1738 | /* Delete all routes from the per-VNI table. */ |
1739 | return delete_all_vni_routes(bgp, vpn); | |
128ea8ab | 1740 | } |
1741 | ||
1742 | /* | |
d1911c26 | 1743 | * There is a tunnel endpoint IP address change for this VNI, delete |
1744 | * prior type-3 route (if needed) and update. | |
1745 | * Note: Route re-advertisement happens elsewhere after other processing | |
1746 | * other changes. | |
128ea8ab | 1747 | */ |
d62a17ae | 1748 | static int handle_tunnel_ip_change(struct bgp *bgp, struct bgpevpn *vpn, |
1749 | struct in_addr originator_ip) | |
128ea8ab | 1750 | { |
d62a17ae | 1751 | struct prefix_evpn p; |
128ea8ab | 1752 | |
ddd16ed5 MK |
1753 | /* If VNI is not live, we only need to update the originator ip */ |
1754 | if (!is_vni_live(vpn)) { | |
1755 | vpn->originator_ip = originator_ip; | |
1756 | return 0; | |
1757 | } | |
1758 | ||
db0e1937 MK |
1759 | /* Update the tunnel-ip hash */ |
1760 | bgp_tip_del(bgp, &vpn->originator_ip); | |
1761 | bgp_tip_add(bgp, &originator_ip); | |
1762 | ||
1763 | /* filter routes as martian nexthop db has changed */ | |
1764 | bgp_filter_evpn_routes_upon_martian_nh_change(bgp); | |
1765 | ||
d62a17ae | 1766 | /* Need to withdraw type-3 route as the originator IP is part |
1767 | * of the key. | |
1768 | */ | |
1769 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
1770 | delete_evpn_route(bgp, vpn, &p); | |
128ea8ab | 1771 | |
d62a17ae | 1772 | /* Update the tunnel IP and re-advertise all routes for this VNI. */ |
1773 | vpn->originator_ip = originator_ip; | |
d1911c26 | 1774 | return 0; |
128ea8ab | 1775 | } |
1776 | ||
d3135ba3 | 1777 | /* |
1778 | * Install route entry into the VRF routing table and invoke route selection. | |
1779 | */ | |
1780 | static int install_evpn_route_entry_in_vrf(struct bgp *bgp_vrf, | |
1781 | struct prefix_evpn *evp, | |
1782 | struct bgp_info *parent_ri) | |
1783 | { | |
1784 | struct bgp_node *rn; | |
1785 | struct bgp_info *ri; | |
1ec31309 | 1786 | struct attr attr; |
d3135ba3 | 1787 | struct attr *attr_new; |
c4edf708 | 1788 | int ret = 0; |
d3135ba3 | 1789 | struct prefix p; |
1790 | struct prefix *pp = &p; | |
1791 | afi_t afi = 0; | |
1792 | safi_t safi = 0; | |
1eb88002 MK |
1793 | char buf[PREFIX_STRLEN]; |
1794 | char buf1[PREFIX_STRLEN]; | |
d3135ba3 | 1795 | |
1796 | memset(pp, 0, sizeof(struct prefix)); | |
90264d64 MK |
1797 | if (evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) |
1798 | ip_prefix_from_type2_prefix(evp, pp); | |
523cafc4 | 1799 | else if (evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE) |
90264d64 | 1800 | ip_prefix_from_type5_prefix(evp, pp); |
d3135ba3 | 1801 | |
1eb88002 | 1802 | if (bgp_debug_zebra(NULL)) { |
996c9314 LB |
1803 | zlog_debug( |
1804 | "installing evpn prefix %s as ip prefix %s in vrf %s", | |
1805 | prefix2str(evp, buf, sizeof(buf)), | |
1806 | prefix2str(pp, buf1, sizeof(buf)), | |
1807 | vrf_id_to_name(bgp_vrf->vrf_id)); | |
1eb88002 MK |
1808 | } |
1809 | ||
d3135ba3 | 1810 | /* Create (or fetch) route within the VRF. */ |
1811 | /* NOTE: There is no RD here. */ | |
1812 | if (IS_EVPN_PREFIX_IPADDR_V4(evp)) { | |
1813 | afi = AFI_IP; | |
1814 | safi = SAFI_UNICAST; | |
1815 | rn = bgp_node_get(bgp_vrf->rib[afi][safi], pp); | |
1816 | } else if (IS_EVPN_PREFIX_IPADDR_V6(evp)) { | |
1817 | afi = AFI_IP6; | |
1818 | safi = SAFI_UNICAST; | |
1819 | rn = bgp_node_get(bgp_vrf->rib[afi][safi], pp); | |
1820 | } else | |
1821 | return 0; | |
1822 | ||
1ec31309 | 1823 | /* EVPN routes currently only support a IPv4 next hop which corresponds |
1824 | * to the remote VTEP. When importing into a VRF, if it is IPv6 host | |
1825 | * route, we have to convert the next hop to an IPv4-mapped address | |
1826 | * for the rest of the code to flow through. | |
1827 | */ | |
1828 | bgp_attr_dup(&attr, parent_ri->attr); | |
1829 | if (afi == AFI_IP6) | |
1830 | evpn_convert_nexthop_to_ipv6(&attr); | |
1831 | ||
d3135ba3 | 1832 | /* Check if route entry is already present. */ |
1833 | for (ri = rn->info; ri; ri = ri->next) | |
1834 | if (ri->extra | |
1835 | && (struct bgp_info *)ri->extra->parent == parent_ri) | |
1836 | break; | |
1837 | ||
1838 | if (!ri) { | |
1839 | /* Add (or update) attribute to hash. */ | |
1ec31309 | 1840 | attr_new = bgp_attr_intern(&attr); |
d3135ba3 | 1841 | |
1842 | /* Create new route with its attribute. */ | |
90f4f482 | 1843 | ri = info_make(parent_ri->type, BGP_ROUTE_IMPORTED, 0, |
d3135ba3 | 1844 | parent_ri->peer, attr_new, rn); |
1845 | SET_FLAG(ri->flags, BGP_INFO_VALID); | |
1846 | bgp_info_extra_get(ri); | |
1847 | ri->extra->parent = parent_ri; | |
b57ba6d2 | 1848 | if (parent_ri->extra) { |
d3135ba3 | 1849 | memcpy(&ri->extra->label, &parent_ri->extra->label, |
b57ba6d2 MK |
1850 | sizeof(ri->extra->label)); |
1851 | ri->extra->num_labels = parent_ri->extra->num_labels; | |
1852 | } | |
d3135ba3 | 1853 | bgp_info_add(rn, ri); |
1854 | } else { | |
1ec31309 | 1855 | if (attrhash_cmp(ri->attr, &attr) |
d3135ba3 | 1856 | && !CHECK_FLAG(ri->flags, BGP_INFO_REMOVED)) { |
1857 | bgp_unlock_node(rn); | |
1858 | return 0; | |
1859 | } | |
1860 | /* The attribute has changed. */ | |
1861 | /* Add (or update) attribute to hash. */ | |
1ec31309 | 1862 | attr_new = bgp_attr_intern(&attr); |
d3135ba3 | 1863 | |
1864 | /* Restore route, if needed. */ | |
1865 | if (CHECK_FLAG(ri->flags, BGP_INFO_REMOVED)) | |
1866 | bgp_info_restore(rn, ri); | |
1867 | ||
1868 | /* Mark if nexthop has changed. */ | |
1ec31309 | 1869 | if ((afi == AFI_IP && |
1870 | !IPV4_ADDR_SAME(&ri->attr->nexthop, &attr_new->nexthop)) || | |
1871 | (afi == AFI_IP6 && | |
1872 | !IPV6_ADDR_SAME(&ri->attr->mp_nexthop_global, | |
1873 | &attr_new->mp_nexthop_global))) | |
d3135ba3 | 1874 | SET_FLAG(ri->flags, BGP_INFO_IGP_CHANGED); |
1875 | ||
1876 | /* Unintern existing, set to new. */ | |
1877 | bgp_attr_unintern(&ri->attr); | |
1878 | ri->attr = attr_new; | |
1879 | ri->uptime = bgp_clock(); | |
1880 | } | |
1881 | ||
1882 | /* Perform route selection and update zebra, if required. */ | |
1eb88002 | 1883 | bgp_process(bgp_vrf, rn, afi, safi); |
d3135ba3 | 1884 | |
1885 | return ret; | |
1886 | } | |
1887 | ||
128ea8ab | 1888 | /* |
1889 | * Install route entry into the VNI routing table and invoke route selection. | |
1890 | */ | |
d62a17ae | 1891 | static int install_evpn_route_entry(struct bgp *bgp, struct bgpevpn *vpn, |
1892 | struct prefix_evpn *p, | |
1893 | struct bgp_info *parent_ri) | |
1894 | { | |
1895 | struct bgp_node *rn; | |
1896 | struct bgp_info *ri; | |
1897 | struct attr *attr_new; | |
1898 | int ret; | |
1899 | ||
1900 | /* Create (or fetch) route within the VNI. */ | |
1901 | /* NOTE: There is no RD here. */ | |
1902 | rn = bgp_node_get(vpn->route_table, (struct prefix *)p); | |
1903 | ||
1904 | /* Check if route entry is already present. */ | |
1905 | for (ri = rn->info; ri; ri = ri->next) | |
1906 | if (ri->extra | |
1907 | && (struct bgp_info *)ri->extra->parent == parent_ri) | |
1908 | break; | |
1909 | ||
1910 | if (!ri) { | |
1911 | /* Add (or update) attribute to hash. */ | |
1912 | attr_new = bgp_attr_intern(parent_ri->attr); | |
1913 | ||
1914 | /* Create new route with its attribute. */ | |
90f4f482 | 1915 | ri = info_make(parent_ri->type, BGP_ROUTE_IMPORTED, 0, |
d62a17ae | 1916 | parent_ri->peer, attr_new, rn); |
1917 | SET_FLAG(ri->flags, BGP_INFO_VALID); | |
1918 | bgp_info_extra_get(ri); | |
1919 | ri->extra->parent = parent_ri; | |
b57ba6d2 | 1920 | if (parent_ri->extra) { |
d62a17ae | 1921 | memcpy(&ri->extra->label, &parent_ri->extra->label, |
b57ba6d2 MK |
1922 | sizeof(ri->extra->label)); |
1923 | ri->extra->num_labels = parent_ri->extra->num_labels; | |
1924 | } | |
d62a17ae | 1925 | bgp_info_add(rn, ri); |
1926 | } else { | |
1927 | if (attrhash_cmp(ri->attr, parent_ri->attr) | |
1928 | && !CHECK_FLAG(ri->flags, BGP_INFO_REMOVED)) { | |
1929 | bgp_unlock_node(rn); | |
1930 | return 0; | |
1931 | } | |
1932 | /* The attribute has changed. */ | |
1933 | /* Add (or update) attribute to hash. */ | |
1934 | attr_new = bgp_attr_intern(parent_ri->attr); | |
1935 | ||
1936 | /* Restore route, if needed. */ | |
1937 | if (CHECK_FLAG(ri->flags, BGP_INFO_REMOVED)) | |
1938 | bgp_info_restore(rn, ri); | |
1939 | ||
1940 | /* Mark if nexthop has changed. */ | |
1941 | if (!IPV4_ADDR_SAME(&ri->attr->nexthop, &attr_new->nexthop)) | |
1942 | SET_FLAG(ri->flags, BGP_INFO_IGP_CHANGED); | |
1943 | ||
1944 | /* Unintern existing, set to new. */ | |
1945 | bgp_attr_unintern(&ri->attr); | |
1946 | ri->attr = attr_new; | |
1947 | ri->uptime = bgp_clock(); | |
1948 | } | |
1949 | ||
1950 | /* Perform route selection and update zebra, if required. */ | |
1951 | ret = evpn_route_select_install(bgp, vpn, rn); | |
1952 | ||
1953 | return ret; | |
128ea8ab | 1954 | } |
1955 | ||
d3135ba3 | 1956 | /* |
1957 | * Uninstall route entry from the VRF routing table and send message | |
1958 | * to zebra, if appropriate. | |
1959 | */ | |
1960 | static int uninstall_evpn_route_entry_in_vrf(struct bgp *bgp_vrf, | |
1961 | struct prefix_evpn *evp, | |
1962 | struct bgp_info *parent_ri) | |
1963 | { | |
1964 | struct bgp_node *rn; | |
1965 | struct bgp_info *ri; | |
c4edf708 | 1966 | int ret = 0; |
d3135ba3 | 1967 | struct prefix p; |
1968 | struct prefix *pp = &p; | |
1969 | afi_t afi = 0; | |
1970 | safi_t safi = 0; | |
1eb88002 MK |
1971 | char buf[PREFIX_STRLEN]; |
1972 | char buf1[PREFIX_STRLEN]; | |
d3135ba3 | 1973 | |
1974 | memset(pp, 0, sizeof(struct prefix)); | |
42cb44f2 MK |
1975 | if (evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) |
1976 | ip_prefix_from_type2_prefix(evp, pp); | |
655b04d1 | 1977 | else if (evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE) |
42cb44f2 | 1978 | ip_prefix_from_type5_prefix(evp, pp); |
d3135ba3 | 1979 | |
1eb88002 | 1980 | if (bgp_debug_zebra(NULL)) { |
996c9314 LB |
1981 | zlog_debug( |
1982 | "uninstalling evpn prefix %s as ip prefix %s in vrf %s", | |
1983 | prefix2str(evp, buf, sizeof(buf)), | |
1984 | prefix2str(pp, buf1, sizeof(buf)), | |
1985 | vrf_id_to_name(bgp_vrf->vrf_id)); | |
1eb88002 MK |
1986 | } |
1987 | ||
d3135ba3 | 1988 | /* Locate route within the VRF. */ |
1989 | /* NOTE: There is no RD here. */ | |
1990 | if (IS_EVPN_PREFIX_IPADDR_V4(evp)) { | |
1991 | afi = AFI_IP; | |
1992 | safi = SAFI_UNICAST; | |
1993 | rn = bgp_node_lookup(bgp_vrf->rib[afi][safi], pp); | |
1994 | } else { | |
1995 | afi = AFI_IP6; | |
1996 | safi = SAFI_UNICAST; | |
1997 | rn = bgp_node_lookup(bgp_vrf->rib[afi][safi], pp); | |
1998 | } | |
1999 | ||
2000 | if (!rn) | |
2001 | return 0; | |
2002 | ||
2003 | /* Find matching route entry. */ | |
2004 | for (ri = rn->info; ri; ri = ri->next) | |
2005 | if (ri->extra | |
2006 | && (struct bgp_info *)ri->extra->parent == parent_ri) | |
2007 | break; | |
2008 | ||
2009 | if (!ri) | |
2010 | return 0; | |
2011 | ||
2012 | /* Mark entry for deletion */ | |
2013 | bgp_info_delete(rn, ri); | |
2014 | ||
2015 | /* Perform route selection and update zebra, if required. */ | |
1eb88002 | 2016 | bgp_process(bgp_vrf, rn, afi, safi); |
d3135ba3 | 2017 | |
2018 | /* Unlock route node. */ | |
2019 | bgp_unlock_node(rn); | |
2020 | ||
2021 | return ret; | |
2022 | } | |
2023 | ||
128ea8ab | 2024 | /* |
2025 | * Uninstall route entry from the VNI routing table and send message | |
2026 | * to zebra, if appropriate. | |
2027 | */ | |
d62a17ae | 2028 | static int uninstall_evpn_route_entry(struct bgp *bgp, struct bgpevpn *vpn, |
2029 | struct prefix_evpn *p, | |
2030 | struct bgp_info *parent_ri) | |
128ea8ab | 2031 | { |
d62a17ae | 2032 | struct bgp_node *rn; |
2033 | struct bgp_info *ri; | |
2034 | int ret; | |
128ea8ab | 2035 | |
d62a17ae | 2036 | /* Locate route within the VNI. */ |
2037 | /* NOTE: There is no RD here. */ | |
2038 | rn = bgp_node_lookup(vpn->route_table, (struct prefix *)p); | |
2039 | if (!rn) | |
2040 | return 0; | |
128ea8ab | 2041 | |
d62a17ae | 2042 | /* Find matching route entry. */ |
2043 | for (ri = rn->info; ri; ri = ri->next) | |
2044 | if (ri->extra | |
2045 | && (struct bgp_info *)ri->extra->parent == parent_ri) | |
2046 | break; | |
128ea8ab | 2047 | |
d62a17ae | 2048 | if (!ri) |
2049 | return 0; | |
128ea8ab | 2050 | |
d62a17ae | 2051 | /* Mark entry for deletion */ |
2052 | bgp_info_delete(rn, ri); | |
128ea8ab | 2053 | |
d62a17ae | 2054 | /* Perform route selection and update zebra, if required. */ |
2055 | ret = evpn_route_select_install(bgp, vpn, rn); | |
128ea8ab | 2056 | |
d62a17ae | 2057 | /* Unlock route node. */ |
2058 | bgp_unlock_node(rn); | |
128ea8ab | 2059 | |
d62a17ae | 2060 | return ret; |
128ea8ab | 2061 | } |
2062 | ||
5ba238b7 MK |
2063 | /* |
2064 | * Given a route entry and a VRF, see if this route entry should be | |
2065 | * imported into the VRF i.e., RTs match. | |
2066 | */ | |
996c9314 | 2067 | static int is_route_matching_for_vrf(struct bgp *bgp_vrf, struct bgp_info *ri) |
5ba238b7 MK |
2068 | { |
2069 | struct attr *attr = ri->attr; | |
2070 | struct ecommunity *ecom; | |
2071 | int i; | |
2072 | ||
2073 | assert(attr); | |
2074 | /* Route should have valid RT to be even considered. */ | |
2075 | if (!(attr->flag & ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES))) | |
2076 | return 0; | |
2077 | ||
2078 | ecom = attr->ecommunity; | |
2079 | if (!ecom || !ecom->size) | |
2080 | return 0; | |
2081 | ||
2082 | /* For each extended community RT, see if it matches this VNI. If any RT | |
2083 | * matches, we're done. | |
2084 | */ | |
2085 | for (i = 0; i < ecom->size; i++) { | |
2086 | u_char *pnt; | |
2087 | u_char type, sub_type; | |
2088 | struct ecommunity_val *eval; | |
2089 | struct ecommunity_val eval_tmp; | |
2090 | struct vrf_irt_node *irt; | |
2091 | ||
2092 | /* Only deal with RTs */ | |
2093 | pnt = (ecom->val + (i * ECOMMUNITY_SIZE)); | |
2094 | eval = (struct ecommunity_val *)(ecom->val | |
2095 | + (i * ECOMMUNITY_SIZE)); | |
2096 | type = *pnt++; | |
2097 | sub_type = *pnt++; | |
2098 | if (sub_type != ECOMMUNITY_ROUTE_TARGET) | |
2099 | continue; | |
2100 | ||
2101 | /* See if this RT matches specified VNIs import RTs */ | |
2102 | irt = lookup_vrf_import_rt(eval); | |
2103 | if (irt && irt->vrfs) | |
2104 | if (is_vrf_present_in_irt_vrfs(irt->vrfs, bgp_vrf)) | |
2105 | return 1; | |
2106 | ||
2107 | /* Also check for non-exact match. In this, we mask out the AS | |
2108 | * and | |
2109 | * only check on the local-admin sub-field. This is to | |
2110 | * facilitate using | |
2111 | * VNI as the RT for EBGP peering too. | |
2112 | */ | |
2113 | irt = NULL; | |
2114 | if (type == ECOMMUNITY_ENCODE_AS | |
2115 | || type == ECOMMUNITY_ENCODE_AS4 | |
2116 | || type == ECOMMUNITY_ENCODE_IP) { | |
2117 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
2118 | mask_ecom_global_admin(&eval_tmp, eval); | |
2119 | irt = lookup_vrf_import_rt(&eval_tmp); | |
2120 | } | |
2121 | if (irt && irt->vrfs) | |
2122 | if (is_vrf_present_in_irt_vrfs(irt->vrfs, bgp_vrf)) | |
2123 | return 1; | |
2124 | } | |
2125 | ||
2126 | return 0; | |
2127 | } | |
2128 | ||
128ea8ab | 2129 | /* |
2130 | * Given a route entry and a VNI, see if this route entry should be | |
2131 | * imported into the VNI i.e., RTs match. | |
2132 | */ | |
d62a17ae | 2133 | static int is_route_matching_for_vni(struct bgp *bgp, struct bgpevpn *vpn, |
2134 | struct bgp_info *ri) | |
2135 | { | |
2136 | struct attr *attr = ri->attr; | |
2137 | struct ecommunity *ecom; | |
2138 | int i; | |
2139 | ||
2140 | assert(attr); | |
2141 | /* Route should have valid RT to be even considered. */ | |
2142 | if (!(attr->flag & ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES))) | |
2143 | return 0; | |
2144 | ||
2145 | ecom = attr->ecommunity; | |
2146 | if (!ecom || !ecom->size) | |
2147 | return 0; | |
2148 | ||
2149 | /* For each extended community RT, see if it matches this VNI. If any RT | |
2150 | * matches, we're done. | |
2151 | */ | |
2152 | for (i = 0; i < ecom->size; i++) { | |
2153 | u_char *pnt; | |
2154 | u_char type, sub_type; | |
2155 | struct ecommunity_val *eval; | |
2156 | struct ecommunity_val eval_tmp; | |
2157 | struct irt_node *irt; | |
2158 | ||
2159 | /* Only deal with RTs */ | |
2160 | pnt = (ecom->val + (i * ECOMMUNITY_SIZE)); | |
2161 | eval = (struct ecommunity_val *)(ecom->val | |
2162 | + (i * ECOMMUNITY_SIZE)); | |
2163 | type = *pnt++; | |
2164 | sub_type = *pnt++; | |
2165 | if (sub_type != ECOMMUNITY_ROUTE_TARGET) | |
2166 | continue; | |
2167 | ||
2168 | /* See if this RT matches specified VNIs import RTs */ | |
2169 | irt = lookup_import_rt(bgp, eval); | |
2170 | if (irt && irt->vnis) | |
2171 | if (is_vni_present_in_irt_vnis(irt->vnis, vpn)) | |
2172 | return 1; | |
2173 | ||
2174 | /* Also check for non-exact match. In this, we mask out the AS | |
2175 | * and | |
2176 | * only check on the local-admin sub-field. This is to | |
2177 | * facilitate using | |
2178 | * VNI as the RT for EBGP peering too. | |
2179 | */ | |
2180 | irt = NULL; | |
2181 | if (type == ECOMMUNITY_ENCODE_AS | |
2182 | || type == ECOMMUNITY_ENCODE_AS4 | |
2183 | || type == ECOMMUNITY_ENCODE_IP) { | |
2184 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
2185 | mask_ecom_global_admin(&eval_tmp, eval); | |
2186 | irt = lookup_import_rt(bgp, &eval_tmp); | |
2187 | } | |
2188 | if (irt && irt->vnis) | |
2189 | if (is_vni_present_in_irt_vnis(irt->vnis, vpn)) | |
2190 | return 1; | |
2191 | } | |
2192 | ||
2193 | return 0; | |
128ea8ab | 2194 | } |
2195 | ||
5ba238b7 MK |
2196 | /* |
2197 | * Install or uninstall mac-ip routes are appropriate for this | |
2198 | * particular VRF. | |
2199 | */ | |
996c9314 | 2200 | static int install_uninstall_routes_for_vrf(struct bgp *bgp_vrf, int install) |
5ba238b7 MK |
2201 | { |
2202 | afi_t afi; | |
2203 | safi_t safi; | |
2204 | struct bgp_node *rd_rn, *rn; | |
2205 | struct bgp_table *table; | |
2206 | struct bgp_info *ri; | |
2207 | int ret; | |
2208 | char buf[PREFIX_STRLEN]; | |
2209 | struct bgp *bgp_def = NULL; | |
2210 | ||
2211 | afi = AFI_L2VPN; | |
2212 | safi = SAFI_EVPN; | |
2213 | bgp_def = bgp_get_default(); | |
2214 | if (!bgp_def) | |
2215 | return -1; | |
2216 | ||
2217 | /* Walk entire global routing table and evaluate routes which could be | |
2218 | * imported into this VRF. Note that we need to loop through all global | |
2219 | * routes to determine which route matches the import rt on vrf | |
2220 | */ | |
2221 | for (rd_rn = bgp_table_top(bgp_def->rib[afi][safi]); rd_rn; | |
2222 | rd_rn = bgp_route_next(rd_rn)) { | |
2223 | table = (struct bgp_table *)(rd_rn->info); | |
2224 | if (!table) | |
2225 | continue; | |
2226 | ||
2227 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) { | |
2228 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
2229 | ||
1eb88002 | 2230 | /* if not mac-ip route skip this route */ |
996c9314 LB |
2231 | if (!(evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE |
2232 | || evp->prefix.route_type | |
2233 | == BGP_EVPN_IP_PREFIX_ROUTE)) | |
5ba238b7 MK |
2234 | continue; |
2235 | ||
1eb88002 | 2236 | /* if not a mac+ip route skip this route */ |
996c9314 LB |
2237 | if (!(IS_EVPN_PREFIX_IPADDR_V4(evp) |
2238 | || IS_EVPN_PREFIX_IPADDR_V6(evp))) | |
1eb88002 MK |
2239 | continue; |
2240 | ||
5ba238b7 MK |
2241 | for (ri = rn->info; ri; ri = ri->next) { |
2242 | /* Consider "valid" remote routes applicable for | |
523cafc4 | 2243 | * this VRF. |
2244 | */ | |
5ba238b7 MK |
2245 | if (!(CHECK_FLAG(ri->flags, BGP_INFO_VALID) |
2246 | && ri->type == ZEBRA_ROUTE_BGP | |
2247 | && ri->sub_type == BGP_ROUTE_NORMAL)) | |
2248 | continue; | |
2249 | ||
2250 | if (is_route_matching_for_vrf(bgp_vrf, ri)) { | |
2251 | if (install) | |
996c9314 | 2252 | ret = install_evpn_route_entry_in_vrf( |
5ba238b7 MK |
2253 | bgp_vrf, evp, ri); |
2254 | else | |
996c9314 | 2255 | ret = uninstall_evpn_route_entry_in_vrf( |
5ba238b7 MK |
2256 | bgp_vrf, evp, ri); |
2257 | ||
2258 | if (ret) { | |
2259 | zlog_err( | |
2260 | "Failed to %s EVPN %s route in VRF %s", | |
2261 | install ? "install" | |
2262 | : "uninstall", | |
2263 | prefix2str(evp, buf, | |
2264 | sizeof(buf)), | |
996c9314 LB |
2265 | vrf_id_to_name( |
2266 | bgp_vrf->vrf_id)); | |
5ba238b7 MK |
2267 | return ret; |
2268 | } | |
2269 | } | |
2270 | } | |
2271 | } | |
2272 | } | |
2273 | ||
2274 | return 0; | |
2275 | } | |
2276 | ||
128ea8ab | 2277 | /* |
2278 | * Install or uninstall routes of specified type that are appropriate for this | |
2279 | * particular VNI. | |
2280 | */ | |
d62a17ae | 2281 | static int install_uninstall_routes_for_vni(struct bgp *bgp, |
2282 | struct bgpevpn *vpn, | |
2283 | bgp_evpn_route_type rtype, | |
2284 | int install) | |
2285 | { | |
0291c246 MK |
2286 | afi_t afi; |
2287 | safi_t safi; | |
2288 | struct bgp_node *rd_rn, *rn; | |
2289 | struct bgp_table *table; | |
2290 | struct bgp_info *ri; | |
2291 | int ret; | |
d62a17ae | 2292 | |
2293 | afi = AFI_L2VPN; | |
2294 | safi = SAFI_EVPN; | |
2295 | ||
2296 | /* Walk entire global routing table and evaluate routes which could be | |
2297 | * imported into this VPN. Note that we cannot just look at the routes | |
2298 | * for | |
2299 | * the VNI's RD - remote routes applicable for this VNI could have any | |
2300 | * RD. | |
2301 | */ | |
2302 | /* EVPN routes are a 2-level table. */ | |
2303 | for (rd_rn = bgp_table_top(bgp->rib[afi][safi]); rd_rn; | |
2304 | rd_rn = bgp_route_next(rd_rn)) { | |
2305 | table = (struct bgp_table *)(rd_rn->info); | |
2306 | if (!table) | |
2307 | continue; | |
2308 | ||
2309 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) { | |
2310 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
2311 | ||
2312 | if (evp->prefix.route_type != rtype) | |
2313 | continue; | |
2314 | ||
2315 | for (ri = rn->info; ri; ri = ri->next) { | |
2316 | /* Consider "valid" remote routes applicable for | |
2317 | * this VNI. */ | |
2318 | if (!(CHECK_FLAG(ri->flags, BGP_INFO_VALID) | |
2319 | && ri->type == ZEBRA_ROUTE_BGP | |
2320 | && ri->sub_type == BGP_ROUTE_NORMAL)) | |
2321 | continue; | |
2322 | ||
2323 | if (is_route_matching_for_vni(bgp, vpn, ri)) { | |
2324 | if (install) | |
2325 | ret = install_evpn_route_entry( | |
60466a63 | 2326 | bgp, vpn, evp, ri); |
d62a17ae | 2327 | else |
2328 | ret = uninstall_evpn_route_entry( | |
2329 | bgp, vpn, evp, ri); | |
2330 | ||
2331 | if (ret) { | |
2332 | zlog_err( | |
2333 | "%u: Failed to %s EVPN %s route in VNI %u", | |
2334 | bgp->vrf_id, | |
2335 | install ? "install" | |
2336 | : "uninstall", | |
2337 | rtype == BGP_EVPN_MAC_IP_ROUTE | |
2338 | ? "MACIP" | |
2339 | : "IMET", | |
2340 | vpn->vni); | |
2341 | return ret; | |
2342 | } | |
2343 | } | |
2344 | } | |
2345 | } | |
2346 | } | |
2347 | ||
2348 | return 0; | |
128ea8ab | 2349 | } |
2350 | ||
5ba238b7 | 2351 | /* Install any existing remote routes applicable for this VRF into VRF RIB. This |
523cafc4 | 2352 | * is invoked upon l3vni-add or l3vni import rt change |
2353 | */ | |
5ba238b7 MK |
2354 | static int install_routes_for_vrf(struct bgp *bgp_vrf) |
2355 | { | |
2356 | install_uninstall_routes_for_vrf(bgp_vrf, 1); | |
2357 | return 0; | |
2358 | } | |
2359 | ||
128ea8ab | 2360 | /* |
2361 | * Install any existing remote routes applicable for this VNI into its | |
2362 | * routing table. This is invoked when a VNI becomes "live" or its Import | |
2363 | * RT is changed. | |
2364 | */ | |
d62a17ae | 2365 | static int install_routes_for_vni(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 2366 | { |
d62a17ae | 2367 | int ret; |
128ea8ab | 2368 | |
d62a17ae | 2369 | /* Install type-3 routes followed by type-2 routes - the ones applicable |
2370 | * for this VNI. | |
2371 | */ | |
2372 | ret = install_uninstall_routes_for_vni(bgp, vpn, BGP_EVPN_IMET_ROUTE, | |
2373 | 1); | |
2374 | if (ret) | |
2375 | return ret; | |
128ea8ab | 2376 | |
d62a17ae | 2377 | return install_uninstall_routes_for_vni(bgp, vpn, BGP_EVPN_MAC_IP_ROUTE, |
2378 | 1); | |
128ea8ab | 2379 | } |
2380 | ||
5ba238b7 MK |
2381 | /* uninstall routes from l3vni vrf. */ |
2382 | static int uninstall_routes_for_vrf(struct bgp *bgp_vrf) | |
2383 | { | |
2384 | install_uninstall_routes_for_vrf(bgp_vrf, 0); | |
2385 | return 0; | |
2386 | } | |
2387 | ||
90e60aa7 | 2388 | /* |
2389 | * Uninstall any existing remote routes for this VNI. One scenario in which | |
2390 | * this is invoked is upon an import RT change. | |
2391 | */ | |
d62a17ae | 2392 | static int uninstall_routes_for_vni(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 2393 | { |
d62a17ae | 2394 | int ret; |
90e60aa7 | 2395 | |
d62a17ae | 2396 | /* Uninstall type-2 routes followed by type-3 routes - the ones |
2397 | * applicable | |
2398 | * for this VNI. | |
2399 | */ | |
2400 | ret = install_uninstall_routes_for_vni(bgp, vpn, BGP_EVPN_MAC_IP_ROUTE, | |
2401 | 0); | |
2402 | if (ret) | |
2403 | return ret; | |
90e60aa7 | 2404 | |
d62a17ae | 2405 | return install_uninstall_routes_for_vni(bgp, vpn, BGP_EVPN_IMET_ROUTE, |
2406 | 0); | |
90e60aa7 | 2407 | } |
2408 | ||
d3135ba3 | 2409 | /* |
2410 | * Install or uninstall route in matching VRFs (list). | |
2411 | */ | |
2412 | static int install_uninstall_route_in_vrfs(struct bgp *bgp_def, afi_t afi, | |
2413 | safi_t safi, struct prefix_evpn *evp, | |
2414 | struct bgp_info *ri, | |
2415 | struct list *vrfs, int install) | |
2416 | { | |
2417 | char buf[PREFIX2STR_BUFFER]; | |
2418 | struct bgp *bgp_vrf; | |
2419 | struct listnode *node, *nnode; | |
2420 | ||
90264d64 | 2421 | /* Only type-2/type-5 routes go into a VRF */ |
996c9314 LB |
2422 | if (!(evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE |
2423 | || evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE)) | |
d3135ba3 | 2424 | return 0; |
2425 | ||
90264d64 | 2426 | /* if it is type-2 route and not a mac+ip route skip this route */ |
996c9314 LB |
2427 | if ((evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) |
2428 | && !(IS_EVPN_PREFIX_IPADDR_V4(evp) | |
2429 | || IS_EVPN_PREFIX_IPADDR_V6(evp))) | |
30a30f57 MK |
2430 | return 0; |
2431 | ||
d3135ba3 | 2432 | for (ALL_LIST_ELEMENTS(vrfs, node, nnode, bgp_vrf)) { |
2433 | int ret; | |
2434 | ||
2435 | if (install) | |
996c9314 | 2436 | ret = install_evpn_route_entry_in_vrf(bgp_vrf, evp, ri); |
d3135ba3 | 2437 | else |
996c9314 LB |
2438 | ret = uninstall_evpn_route_entry_in_vrf(bgp_vrf, evp, |
2439 | ri); | |
d3135ba3 | 2440 | |
2441 | if (ret) { | |
2442 | zlog_err("%u: Failed to %s prefix %s in VRF %s", | |
2443 | bgp_def->vrf_id, | |
2444 | install ? "install" : "uninstall", | |
2445 | prefix2str(evp, buf, sizeof(buf)), | |
2446 | vrf_id_to_name(bgp_vrf->vrf_id)); | |
2447 | return ret; | |
2448 | } | |
2449 | } | |
2450 | ||
2451 | return 0; | |
2452 | } | |
2453 | ||
128ea8ab | 2454 | /* |
2455 | * Install or uninstall route in matching VNIs (list). | |
2456 | */ | |
d62a17ae | 2457 | static int install_uninstall_route_in_vnis(struct bgp *bgp, afi_t afi, |
2458 | safi_t safi, struct prefix_evpn *evp, | |
2459 | struct bgp_info *ri, | |
2460 | struct list *vnis, int install) | |
128ea8ab | 2461 | { |
d62a17ae | 2462 | struct bgpevpn *vpn; |
2463 | struct listnode *node, *nnode; | |
128ea8ab | 2464 | |
d62a17ae | 2465 | for (ALL_LIST_ELEMENTS(vnis, node, nnode, vpn)) { |
2466 | int ret; | |
128ea8ab | 2467 | |
d62a17ae | 2468 | if (!is_vni_live(vpn)) |
2469 | continue; | |
128ea8ab | 2470 | |
d62a17ae | 2471 | if (install) |
2472 | ret = install_evpn_route_entry(bgp, vpn, evp, ri); | |
2473 | else | |
2474 | ret = uninstall_evpn_route_entry(bgp, vpn, evp, ri); | |
128ea8ab | 2475 | |
d62a17ae | 2476 | if (ret) { |
2477 | zlog_err("%u: Failed to %s EVPN %s route in VNI %u", | |
2478 | bgp->vrf_id, install ? "install" : "uninstall", | |
2479 | evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE | |
2480 | ? "MACIP" | |
2481 | : "IMET", | |
2482 | vpn->vni); | |
2483 | return ret; | |
2484 | } | |
2485 | } | |
128ea8ab | 2486 | |
d62a17ae | 2487 | return 0; |
128ea8ab | 2488 | } |
2489 | ||
2490 | /* | |
2491 | * Install or uninstall route for appropriate VNIs. | |
2492 | */ | |
d62a17ae | 2493 | static int install_uninstall_evpn_route(struct bgp *bgp, afi_t afi, safi_t safi, |
2494 | struct prefix *p, struct bgp_info *ri, | |
2495 | int import) | |
2496 | { | |
2497 | struct prefix_evpn *evp = (struct prefix_evpn *)p; | |
2498 | struct attr *attr = ri->attr; | |
2499 | struct ecommunity *ecom; | |
2500 | int i; | |
2501 | ||
2502 | assert(attr); | |
2503 | ||
90264d64 | 2504 | /* Only type-2 and type-3 and type-5 are supported currently */ |
d62a17ae | 2505 | if (!(evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE |
90264d64 MK |
2506 | || evp->prefix.route_type == BGP_EVPN_IMET_ROUTE |
2507 | || evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE)) | |
d62a17ae | 2508 | return 0; |
2509 | ||
2510 | /* If we don't have Route Target, nothing much to do. */ | |
2511 | if (!(attr->flag & ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES))) | |
2512 | return 0; | |
2513 | ||
2514 | ecom = attr->ecommunity; | |
2515 | if (!ecom || !ecom->size) | |
2516 | return -1; | |
2517 | ||
90264d64 MK |
2518 | /* For each extended community RT, see which VNIs/VRFs match and import |
2519 | * the route into matching VNIs/VRFs. | |
d62a17ae | 2520 | */ |
2521 | for (i = 0; i < ecom->size; i++) { | |
2522 | u_char *pnt; | |
2523 | u_char type, sub_type; | |
2524 | struct ecommunity_val *eval; | |
2525 | struct ecommunity_val eval_tmp; | |
996c9314 | 2526 | struct irt_node *irt; /* import rt for l2vni */ |
d3135ba3 | 2527 | struct vrf_irt_node *vrf_irt; /* import rt for l3vni */ |
d62a17ae | 2528 | |
2529 | /* Only deal with RTs */ | |
2530 | pnt = (ecom->val + (i * ECOMMUNITY_SIZE)); | |
2531 | eval = (struct ecommunity_val *)(ecom->val | |
2532 | + (i * ECOMMUNITY_SIZE)); | |
2533 | type = *pnt++; | |
2534 | sub_type = *pnt++; | |
2535 | if (sub_type != ECOMMUNITY_ROUTE_TARGET) | |
2536 | continue; | |
2537 | ||
90264d64 | 2538 | /* Import route into matching l2-vnis (type-2/type-3 routes go |
523cafc4 | 2539 | * into l2vni table) |
2540 | */ | |
d62a17ae | 2541 | irt = lookup_import_rt(bgp, eval); |
2542 | if (irt && irt->vnis) | |
2543 | install_uninstall_route_in_vnis(bgp, afi, safi, evp, ri, | |
2544 | irt->vnis, import); | |
2545 | ||
90264d64 | 2546 | /* Import route into matching l3-vnis (type-2/type-5 routes go |
523cafc4 | 2547 | * into l3vni/vrf table) |
2548 | */ | |
d3135ba3 | 2549 | vrf_irt = lookup_vrf_import_rt(eval); |
2550 | if (vrf_irt && vrf_irt->vrfs) | |
2551 | install_uninstall_route_in_vrfs(bgp, afi, safi, evp, ri, | |
2552 | vrf_irt->vrfs, import); | |
2553 | ||
90264d64 MK |
2554 | /* Also check for non-exact match. In this, |
2555 | * we mask out the AS and | |
2556 | * only check on the local-admin sub-field. | |
2557 | * This is to facilitate using | |
d62a17ae | 2558 | * VNI as the RT for EBGP peering too. |
2559 | */ | |
2560 | irt = NULL; | |
d3135ba3 | 2561 | vrf_irt = NULL; |
d62a17ae | 2562 | if (type == ECOMMUNITY_ENCODE_AS |
2563 | || type == ECOMMUNITY_ENCODE_AS4 | |
2564 | || type == ECOMMUNITY_ENCODE_IP) { | |
2565 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
2566 | mask_ecom_global_admin(&eval_tmp, eval); | |
2567 | irt = lookup_import_rt(bgp, &eval_tmp); | |
d3135ba3 | 2568 | vrf_irt = lookup_vrf_import_rt(&eval_tmp); |
d62a17ae | 2569 | } |
2570 | if (irt && irt->vnis) | |
2571 | install_uninstall_route_in_vnis(bgp, afi, safi, evp, ri, | |
2572 | irt->vnis, import); | |
d3135ba3 | 2573 | if (vrf_irt && vrf_irt->vrfs) |
996c9314 LB |
2574 | install_uninstall_route_in_vrfs(bgp, afi, safi, evp, ri, |
2575 | vrf_irt->vrfs, import); | |
d62a17ae | 2576 | } |
2577 | ||
2578 | return 0; | |
128ea8ab | 2579 | } |
2580 | ||
80b140af MK |
2581 | /* delete and withdraw all ipv4 and ipv6 routes in the vrf table as type-5 |
2582 | * routes */ | |
2583 | static void delete_withdraw_vrf_routes(struct bgp *bgp_vrf) | |
2584 | { | |
2585 | /* delete all ipv4 routes and withdraw from peers */ | |
fdf19f06 MK |
2586 | if (advertise_type5_routes(bgp_vrf, AFI_IP)) |
2587 | bgp_evpn_withdraw_type5_routes(bgp_vrf, AFI_IP, SAFI_UNICAST); | |
80b140af MK |
2588 | |
2589 | /* delete all ipv6 routes and withdraw from peers */ | |
fdf19f06 MK |
2590 | if (advertise_type5_routes(bgp_vrf, AFI_IP6)) |
2591 | bgp_evpn_withdraw_type5_routes(bgp_vrf, AFI_IP6, SAFI_UNICAST); | |
80b140af MK |
2592 | } |
2593 | ||
2594 | /* update and advertise all ipv4 and ipv6 routes in thr vrf table as type-5 | |
2595 | * routes */ | |
2596 | static void update_advertise_vrf_routes(struct bgp *bgp_vrf) | |
2597 | { | |
2598 | /* update all ipv4 routes */ | |
fdf19f06 MK |
2599 | if (advertise_type5_routes(bgp_vrf, AFI_IP)) |
2600 | bgp_evpn_advertise_type5_routes(bgp_vrf, AFI_IP, SAFI_UNICAST); | |
80b140af MK |
2601 | |
2602 | /* update all ipv6 routes */ | |
fdf19f06 MK |
2603 | if (advertise_type5_routes(bgp_vrf, AFI_IP6)) |
2604 | bgp_evpn_advertise_type5_routes(bgp_vrf, AFI_IP6, SAFI_UNICAST); | |
80b140af MK |
2605 | } |
2606 | ||
676f83b9 | 2607 | /* |
2608 | * update and advertise local routes for a VRF as type-5 routes. | |
2609 | * This is invoked upon RD change for a VRF. Note taht the processing is only | |
2610 | * done in the global route table using the routes which already exist in the | |
2611 | * VRF routing table | |
2612 | */ | |
80b140af | 2613 | static void update_router_id_vrf(struct bgp *bgp_vrf) |
676f83b9 | 2614 | { |
80b140af MK |
2615 | /* skip if the RD is configured */ |
2616 | if (is_vrf_rd_configured(bgp_vrf)) | |
2617 | return; | |
2618 | ||
2619 | /* derive the RD for the VRF based on new router-id */ | |
2620 | bgp_evpn_derive_auto_rd_for_vrf(bgp_vrf); | |
2621 | ||
2622 | /* update advertise ipv4|ipv6 routes as type-5 routes */ | |
2623 | update_advertise_vrf_routes(bgp_vrf); | |
676f83b9 | 2624 | } |
2625 | ||
2626 | /* | |
2627 | * Delete and withdraw all type-5 routes for the RD corresponding to VRF. | |
2628 | * This is invoked upon VRF RD change. The processing is done only from global | |
2629 | * table. | |
2630 | */ | |
80b140af | 2631 | static void withdraw_router_id_vrf(struct bgp *bgp_vrf) |
676f83b9 | 2632 | { |
80b140af MK |
2633 | /* skip if the RD is configured */ |
2634 | if (is_vrf_rd_configured(bgp_vrf)) | |
2635 | return; | |
2636 | ||
2637 | /* delete/withdraw ipv4|ipv6 routes as type-5 routes */ | |
2638 | delete_withdraw_vrf_routes(bgp_vrf); | |
676f83b9 | 2639 | } |
2640 | ||
90e60aa7 | 2641 | /* |
2642 | * Update and advertise local routes for a VNI. Invoked upon router-id | |
2643 | * change. Note that the processing is done only on the global route table | |
2644 | * using routes that already exist in the per-VNI table. | |
2645 | */ | |
d62a17ae | 2646 | static int update_advertise_vni_routes(struct bgp *bgp, struct bgpevpn *vpn) |
2647 | { | |
2648 | struct prefix_evpn p; | |
2649 | struct bgp_node *rn, *global_rn; | |
2650 | struct bgp_info *ri, *global_ri; | |
2651 | struct attr *attr; | |
2652 | afi_t afi = AFI_L2VPN; | |
2653 | safi_t safi = SAFI_EVPN; | |
2654 | ||
2655 | /* Locate type-3 route for VNI in the per-VNI table and use its | |
2656 | * attributes to create and advertise the type-3 route for this VNI | |
2657 | * in the global table. | |
2658 | */ | |
2659 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
2660 | rn = bgp_node_lookup(vpn->route_table, (struct prefix *)&p); | |
2661 | if (!rn) /* unexpected */ | |
2662 | return 0; | |
2663 | for (ri = rn->info; ri; ri = ri->next) | |
2664 | if (ri->peer == bgp->peer_self && ri->type == ZEBRA_ROUTE_BGP | |
2665 | && ri->sub_type == BGP_ROUTE_STATIC) | |
2666 | break; | |
2667 | if (!ri) /* unexpected */ | |
2668 | return 0; | |
2669 | attr = ri->attr; | |
2670 | ||
2671 | global_rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, | |
2672 | (struct prefix *)&p, &vpn->prd); | |
1a98c087 MK |
2673 | update_evpn_route_entry(bgp, vpn, afi, safi, global_rn, attr, 1, 0, &ri, |
2674 | 0); | |
d62a17ae | 2675 | |
2676 | /* Schedule for processing and unlock node. */ | |
2677 | bgp_process(bgp, global_rn, afi, safi); | |
2678 | bgp_unlock_node(global_rn); | |
2679 | ||
2680 | /* Now, walk this VNI's route table and use the route and its attribute | |
2681 | * to create and schedule route in global table. | |
2682 | */ | |
2683 | for (rn = bgp_table_top(vpn->route_table); rn; | |
2684 | rn = bgp_route_next(rn)) { | |
2685 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
2686 | ||
2687 | /* Identify MAC-IP local routes. */ | |
2688 | if (evp->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE) | |
2689 | continue; | |
2690 | ||
2691 | for (ri = rn->info; ri; ri = ri->next) | |
2692 | if (ri->peer == bgp->peer_self | |
2693 | && ri->type == ZEBRA_ROUTE_BGP | |
2694 | && ri->sub_type == BGP_ROUTE_STATIC) | |
2695 | break; | |
2696 | if (!ri) | |
2697 | continue; | |
2698 | ||
2699 | /* Create route in global routing table using this route entry's | |
2700 | * attribute. | |
2701 | */ | |
2702 | attr = ri->attr; | |
2703 | global_rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, | |
2704 | (struct prefix *)evp, &vpn->prd); | |
2705 | assert(global_rn); | |
2706 | update_evpn_route_entry(bgp, vpn, afi, safi, global_rn, attr, 1, | |
1a98c087 | 2707 | 0, &global_ri, 0); |
d62a17ae | 2708 | |
2709 | /* Schedule for processing and unlock node. */ | |
2710 | bgp_process(bgp, global_rn, afi, safi); | |
2711 | bgp_unlock_node(global_rn); | |
2712 | } | |
2713 | ||
2714 | return 0; | |
90e60aa7 | 2715 | } |
2716 | ||
2717 | /* | |
2718 | * Delete (and withdraw) local routes for a VNI - only from the global | |
2719 | * table. Invoked upon router-id change. | |
2720 | */ | |
d62a17ae | 2721 | static int delete_withdraw_vni_routes(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 2722 | { |
d62a17ae | 2723 | int ret; |
2724 | struct prefix_evpn p; | |
2725 | struct bgp_node *global_rn; | |
2726 | struct bgp_info *ri; | |
2727 | afi_t afi = AFI_L2VPN; | |
2728 | safi_t safi = SAFI_EVPN; | |
90e60aa7 | 2729 | |
d62a17ae | 2730 | /* Delete and withdraw locally learnt type-2 routes (MACIP) |
2731 | * for this VNI - from the global table. | |
2732 | */ | |
2733 | ret = delete_global_type2_routes(bgp, vpn); | |
2734 | if (ret) | |
2735 | return ret; | |
90e60aa7 | 2736 | |
d62a17ae | 2737 | /* Remove type-3 route for this VNI from global table. */ |
2738 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
2739 | global_rn = bgp_afi_node_lookup(bgp->rib[afi][safi], afi, safi, | |
2740 | (struct prefix *)&p, &vpn->prd); | |
2741 | if (global_rn) { | |
2742 | /* Delete route entry in the global EVPN table. */ | |
2743 | delete_evpn_route_entry(bgp, vpn, afi, safi, global_rn, &ri); | |
90e60aa7 | 2744 | |
d62a17ae | 2745 | /* Schedule for processing - withdraws to peers happen from |
2746 | * this table. | |
2747 | */ | |
2748 | if (ri) | |
2749 | bgp_process(bgp, global_rn, afi, safi); | |
2750 | bgp_unlock_node(global_rn); | |
2751 | } | |
90e60aa7 | 2752 | |
d62a17ae | 2753 | return 0; |
90e60aa7 | 2754 | } |
2755 | ||
2d48ee25 | 2756 | /* |
2757 | * Handle router-id change. Update and advertise local routes corresponding | |
2758 | * to this VNI from peers. Note that this is invoked after updating the | |
2759 | * router-id. The routes in the per-VNI table are used to create routes in | |
2760 | * the global table and schedule them. | |
2761 | */ | |
d62a17ae | 2762 | static void update_router_id_vni(struct hash_backet *backet, struct bgp *bgp) |
2d48ee25 | 2763 | { |
d62a17ae | 2764 | struct bgpevpn *vpn; |
2d48ee25 | 2765 | |
d62a17ae | 2766 | vpn = (struct bgpevpn *)backet->data; |
2d48ee25 | 2767 | |
d62a17ae | 2768 | if (!vpn) { |
2769 | zlog_warn("%s: VNI hash entry for VNI not found", __FUNCTION__); | |
2770 | return; | |
2771 | } | |
2d48ee25 | 2772 | |
d62a17ae | 2773 | /* Skip VNIs with configured RD. */ |
2774 | if (is_rd_configured(vpn)) | |
2775 | return; | |
2d48ee25 | 2776 | |
d62a17ae | 2777 | bgp_evpn_derive_auto_rd(bgp, vpn); |
2778 | update_advertise_vni_routes(bgp, vpn); | |
2d48ee25 | 2779 | } |
2780 | ||
2781 | /* | |
2782 | * Handle router-id change. Delete and withdraw local routes corresponding | |
2783 | * to this VNI from peers. Note that this is invoked prior to updating | |
2784 | * the router-id and is done only on the global route table, the routes | |
2785 | * are needed in the per-VNI table to re-advertise with new router id. | |
2786 | */ | |
d62a17ae | 2787 | static void withdraw_router_id_vni(struct hash_backet *backet, struct bgp *bgp) |
2d48ee25 | 2788 | { |
d62a17ae | 2789 | struct bgpevpn *vpn; |
2d48ee25 | 2790 | |
d62a17ae | 2791 | vpn = (struct bgpevpn *)backet->data; |
2d48ee25 | 2792 | |
d62a17ae | 2793 | if (!vpn) { |
2794 | zlog_warn("%s: VNI hash entry for VNI not found", __FUNCTION__); | |
2795 | return; | |
2796 | } | |
2d48ee25 | 2797 | |
d62a17ae | 2798 | /* Skip VNIs with configured RD. */ |
2799 | if (is_rd_configured(vpn)) | |
2800 | return; | |
2d48ee25 | 2801 | |
d62a17ae | 2802 | delete_withdraw_vni_routes(bgp, vpn); |
2d48ee25 | 2803 | } |
2804 | ||
128ea8ab | 2805 | /* |
2806 | * Process received EVPN type-2 route (advertise or withdraw). | |
2807 | */ | |
d62a17ae | 2808 | static int process_type2_route(struct peer *peer, afi_t afi, safi_t safi, |
2809 | struct attr *attr, u_char *pfx, int psize, | |
2810 | u_int32_t addpath_id) | |
2811 | { | |
2812 | struct prefix_rd prd; | |
2813 | struct prefix_evpn p; | |
2814 | u_char ipaddr_len; | |
2815 | u_char macaddr_len; | |
b57ba6d2 MK |
2816 | mpls_label_t label[BGP_MAX_LABELS]; /* holds the VNI(s) as in packet */ |
2817 | u_int32_t num_labels = 0; | |
d62a17ae | 2818 | int ret; |
2819 | ||
2820 | /* Type-2 route should be either 33, 37 or 49 bytes or an | |
2821 | * additional 3 bytes if there is a second label (VNI): | |
2822 | * RD (8), ESI (10), Eth Tag (4), MAC Addr Len (1), | |
2823 | * MAC Addr (6), IP len (1), IP (0, 4 or 16), | |
2824 | * MPLS Lbl1 (3), MPLS Lbl2 (0 or 3) | |
2825 | */ | |
2826 | if (psize != 33 && psize != 37 && psize != 49 && psize != 36 | |
2827 | && psize != 40 && psize != 52) { | |
2828 | zlog_err("%u:%s - Rx EVPN Type-2 NLRI with invalid length %d", | |
2829 | peer->bgp->vrf_id, peer->host, psize); | |
2830 | return -1; | |
2831 | } | |
2832 | ||
2833 | /* Make prefix_rd */ | |
2834 | prd.family = AF_UNSPEC; | |
2835 | prd.prefixlen = 64; | |
2836 | memcpy(&prd.val, pfx, 8); | |
2837 | pfx += 8; | |
2838 | ||
2839 | /* Make EVPN prefix. */ | |
2840 | memset(&p, 0, sizeof(struct prefix_evpn)); | |
b03b8898 | 2841 | p.family = AF_EVPN; |
d62a17ae | 2842 | p.prefixlen = EVPN_TYPE_2_ROUTE_PREFIXLEN; |
2843 | p.prefix.route_type = BGP_EVPN_MAC_IP_ROUTE; | |
2844 | ||
2845 | /* Skip over Ethernet Seg Identifier for now. */ | |
2846 | pfx += 10; | |
2847 | ||
2848 | /* Skip over Ethernet Tag for now. */ | |
2849 | pfx += 4; | |
2850 | ||
2851 | /* Get the MAC Addr len */ | |
2852 | macaddr_len = *pfx++; | |
2853 | ||
2854 | /* Get the MAC Addr */ | |
28328ea9 DS |
2855 | if (macaddr_len == (ETH_ALEN * 8)) { |
2856 | memcpy(&p.prefix.mac.octet, pfx, ETH_ALEN); | |
2857 | pfx += ETH_ALEN; | |
d62a17ae | 2858 | } else { |
2859 | zlog_err( | |
2860 | "%u:%s - Rx EVPN Type-2 NLRI with unsupported MAC address length %d", | |
2861 | peer->bgp->vrf_id, peer->host, macaddr_len); | |
2862 | return -1; | |
2863 | } | |
2864 | ||
2865 | ||
2866 | /* Get the IP. */ | |
2867 | ipaddr_len = *pfx++; | |
2868 | if (ipaddr_len != 0 && ipaddr_len != IPV4_MAX_BITLEN | |
2869 | && ipaddr_len != IPV6_MAX_BITLEN) { | |
2870 | zlog_err( | |
2871 | "%u:%s - Rx EVPN Type-2 NLRI with unsupported IP address length %d", | |
2872 | peer->bgp->vrf_id, peer->host, ipaddr_len); | |
2873 | return -1; | |
2874 | } | |
2875 | ||
2876 | if (ipaddr_len) { | |
2877 | ipaddr_len /= 8; /* Convert to bytes. */ | |
2878 | p.prefix.ip.ipa_type = (ipaddr_len == IPV4_MAX_BYTELEN) | |
2879 | ? IPADDR_V4 | |
2880 | : IPADDR_V6; | |
2881 | memcpy(&p.prefix.ip.ip.addr, pfx, ipaddr_len); | |
2882 | } | |
2883 | pfx += ipaddr_len; | |
2884 | ||
b57ba6d2 MK |
2885 | /* Get the VNI(s). Stored as bytes here. */ |
2886 | num_labels++; | |
2887 | memset(label, 0, sizeof(label)); | |
2888 | memcpy(&label[0], pfx, BGP_LABEL_BYTES); | |
1b817c78 | 2889 | pfx += BGP_LABEL_BYTES; |
b57ba6d2 MK |
2890 | psize -= (33 + ipaddr_len); |
2891 | /* Do we have a second VNI? */ | |
2892 | if (psize) { | |
2893 | num_labels++; | |
2894 | memcpy(&label[1], pfx, BGP_LABEL_BYTES); | |
6b11bd8d | 2895 | /* |
2896 | * If in future, we are required to access additional fields, | |
996c9314 LB |
2897 | * we MUST increment pfx by BGP_LABEL_BYTES in before reading |
2898 | * 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 | ||
7fd077aa | 2935 | /* If PMSI is present, log if it is anything other than IR. |
2936 | * Note: We just simply ignore the values as it is not clear if | |
2937 | * doing anything else is better. | |
2938 | */ | |
2939 | if (attr && | |
2940 | (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_PMSI_TUNNEL))) { | |
2941 | if (attr->pmsi_tnl_type != PMSI_TNLTYPE_INGR_REPL) { | |
d0be47e8 | 2942 | zlog_warn("%u:%s - Rx EVPN Type-3 NLRI with unsupported PTA %d", |
7fd077aa | 2943 | peer->bgp->vrf_id, peer->host, |
2944 | attr->pmsi_tnl_type); | |
2945 | } | |
2946 | } | |
2947 | ||
d62a17ae | 2948 | /* Make prefix_rd */ |
2949 | prd.family = AF_UNSPEC; | |
2950 | prd.prefixlen = 64; | |
2951 | memcpy(&prd.val, pfx, 8); | |
2952 | pfx += 8; | |
2953 | ||
2954 | /* Make EVPN prefix. */ | |
2955 | memset(&p, 0, sizeof(struct prefix_evpn)); | |
b03b8898 | 2956 | p.family = AF_EVPN; |
d62a17ae | 2957 | p.prefixlen = EVPN_TYPE_3_ROUTE_PREFIXLEN; |
2958 | p.prefix.route_type = BGP_EVPN_IMET_ROUTE; | |
2959 | ||
2960 | /* Skip over Ethernet Tag for now. */ | |
2961 | pfx += 4; | |
2962 | ||
2963 | /* Get the IP. */ | |
2964 | ipaddr_len = *pfx++; | |
2965 | if (ipaddr_len == IPV4_MAX_BITLEN) { | |
2966 | p.prefix.ip.ipa_type = IPADDR_V4; | |
2967 | memcpy(&p.prefix.ip.ip.addr, pfx, IPV4_MAX_BYTELEN); | |
2968 | } else { | |
2969 | zlog_err( | |
2970 | "%u:%s - Rx EVPN Type-3 NLRI with unsupported IP address length %d", | |
2971 | peer->bgp->vrf_id, peer->host, ipaddr_len); | |
2972 | return -1; | |
2973 | } | |
2974 | ||
2975 | /* Process the route. */ | |
2976 | if (attr) | |
2977 | ret = bgp_update(peer, (struct prefix *)&p, addpath_id, attr, | |
2978 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
b57ba6d2 | 2979 | &prd, NULL, 0, 0, NULL); |
d62a17ae | 2980 | else |
2981 | ret = bgp_withdraw(peer, (struct prefix *)&p, addpath_id, attr, | |
2982 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
b57ba6d2 | 2983 | &prd, NULL, 0, NULL); |
d62a17ae | 2984 | return ret; |
128ea8ab | 2985 | } |
2986 | ||
2987 | /* | |
2988 | * Process received EVPN type-5 route (advertise or withdraw). | |
2989 | */ | |
d62a17ae | 2990 | static int process_type5_route(struct peer *peer, afi_t afi, safi_t safi, |
2991 | struct attr *attr, u_char *pfx, int psize, | |
2992 | u_int32_t addpath_id, int withdraw) | |
2993 | { | |
2994 | struct prefix_rd prd; | |
2995 | struct prefix_evpn p; | |
2996 | struct bgp_route_evpn evpn; | |
2997 | u_char ippfx_len; | |
2998 | u_int32_t eth_tag; | |
b57ba6d2 | 2999 | mpls_label_t label; /* holds the VNI as in the packet */ |
d62a17ae | 3000 | int ret; |
3001 | ||
3002 | /* Type-5 route should be 34 or 58 bytes: | |
3003 | * RD (8), ESI (10), Eth Tag (4), IP len (1), IP (4 or 16), | |
3004 | * GW (4 or 16) and VNI (3). | |
3005 | * Note that the IP and GW should both be IPv4 or both IPv6. | |
3006 | */ | |
3007 | if (psize != 34 && psize != 58) { | |
3008 | zlog_err("%u:%s - Rx EVPN Type-5 NLRI with invalid length %d", | |
3009 | peer->bgp->vrf_id, peer->host, psize); | |
3010 | return -1; | |
3011 | } | |
3012 | ||
3013 | /* Make prefix_rd */ | |
3014 | prd.family = AF_UNSPEC; | |
3015 | prd.prefixlen = 64; | |
3016 | memcpy(&prd.val, pfx, 8); | |
3017 | pfx += 8; | |
3018 | ||
3019 | /* Make EVPN prefix. */ | |
3020 | memset(&p, 0, sizeof(struct prefix_evpn)); | |
b03b8898 | 3021 | p.family = AF_EVPN; |
e9fc2840 | 3022 | p.prefixlen = EVPN_TYPE_5_ROUTE_PREFIXLEN; |
d62a17ae | 3023 | p.prefix.route_type = BGP_EVPN_IP_PREFIX_ROUTE; |
3024 | ||
3025 | /* Additional information outside of prefix - ESI and GW IP */ | |
3026 | memset(&evpn, 0, sizeof(evpn)); | |
3027 | ||
3028 | /* Fetch ESI */ | |
3029 | memcpy(&evpn.eth_s_id.val, pfx, 10); | |
3030 | pfx += 10; | |
3031 | ||
3032 | /* Fetch Ethernet Tag. */ | |
3033 | memcpy(ð_tag, pfx, 4); | |
3034 | p.prefix.eth_tag = ntohl(eth_tag); | |
3035 | pfx += 4; | |
3036 | ||
3037 | /* Fetch IP prefix length. */ | |
3038 | ippfx_len = *pfx++; | |
3039 | if (ippfx_len > IPV6_MAX_BITLEN) { | |
3040 | zlog_err( | |
3041 | "%u:%s - Rx EVPN Type-5 NLRI with invalid IP Prefix length %d", | |
3042 | peer->bgp->vrf_id, peer->host, ippfx_len); | |
3043 | return -1; | |
3044 | } | |
3045 | p.prefix.ip_prefix_length = ippfx_len; | |
3046 | ||
3047 | /* Determine IPv4 or IPv6 prefix */ | |
3048 | /* Since the address and GW are from the same family, this just becomes | |
3049 | * a simple check on the total size. | |
3050 | */ | |
3051 | if (psize == 34) { | |
3052 | SET_IPADDR_V4(&p.prefix.ip); | |
3053 | memcpy(&p.prefix.ip.ipaddr_v4, pfx, 4); | |
3054 | pfx += 4; | |
3055 | memcpy(&evpn.gw_ip.ipv4, pfx, 4); | |
3056 | pfx += 4; | |
d62a17ae | 3057 | } else { |
3058 | SET_IPADDR_V6(&p.prefix.ip); | |
3059 | memcpy(&p.prefix.ip.ipaddr_v6, pfx, 16); | |
3060 | pfx += 16; | |
3061 | memcpy(&evpn.gw_ip.ipv6, pfx, 16); | |
3062 | pfx += 16; | |
d62a17ae | 3063 | } |
3064 | ||
b57ba6d2 MK |
3065 | /* Get the VNI (in MPLS label field). Stored as bytes here. */ |
3066 | memset(&label, 0, sizeof(label)); | |
3067 | memcpy(&label, pfx, BGP_LABEL_BYTES); | |
6b11bd8d | 3068 | |
3069 | /* | |
3070 | * If in future, we are required to access additional fields, | |
996c9314 LB |
3071 | * we MUST increment pfx by BGP_LABEL_BYTES in before reading the next |
3072 | * field | |
6b11bd8d | 3073 | */ |
d62a17ae | 3074 | |
3075 | /* Process the route. */ | |
3076 | if (!withdraw) | |
3077 | ret = bgp_update(peer, (struct prefix *)&p, addpath_id, attr, | |
3078 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
b57ba6d2 | 3079 | &prd, &label, 1, 0, &evpn); |
d62a17ae | 3080 | else |
3081 | ret = bgp_withdraw(peer, (struct prefix *)&p, addpath_id, attr, | |
3082 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
b57ba6d2 | 3083 | &prd, &label, 1, &evpn); |
d62a17ae | 3084 | |
3085 | return ret; | |
3086 | } | |
3087 | ||
3088 | static void evpn_mpattr_encode_type5(struct stream *s, struct prefix *p, | |
996c9314 LB |
3089 | struct prefix_rd *prd, mpls_label_t *label, |
3090 | u_int32_t num_labels, struct attr *attr) | |
d62a17ae | 3091 | { |
3092 | int len; | |
3093 | char temp[16]; | |
3094 | struct evpn_addr *p_evpn_p; | |
3095 | ||
3096 | memset(&temp, 0, 16); | |
b03b8898 | 3097 | if (p->family != AF_EVPN) |
d62a17ae | 3098 | return; |
3099 | p_evpn_p = &(p->u.prefix_evpn); | |
3100 | ||
e9fc2840 | 3101 | /* len denites the total len of IP and GW-IP in the route |
523cafc4 | 3102 | IP and GW-IP have to be both ipv4 or ipv6 |
3103 | */ | |
d62a17ae | 3104 | if (IS_IPADDR_V4(&p_evpn_p->ip)) |
e9fc2840 | 3105 | len = 8; /* IP and GWIP are both ipv4 */ |
d62a17ae | 3106 | else |
e9fc2840 | 3107 | len = 32; /* IP and GWIP are both ipv6 */ |
d62a17ae | 3108 | /* Prefix contains RD, ESI, EthTag, IP length, IP, GWIP and VNI */ |
3109 | stream_putc(s, 8 + 10 + 4 + 1 + len + 3); | |
3110 | stream_put(s, prd->val, 8); | |
0af35d90 | 3111 | if (attr) |
d62a17ae | 3112 | stream_put(s, &(attr->evpn_overlay.eth_s_id), 10); |
3113 | else | |
3114 | stream_put(s, &temp, 10); | |
3115 | stream_putl(s, p_evpn_p->eth_tag); | |
3116 | stream_putc(s, p_evpn_p->ip_prefix_length); | |
3117 | if (IS_IPADDR_V4(&p_evpn_p->ip)) | |
3118 | stream_put_ipv4(s, p_evpn_p->ip.ipaddr_v4.s_addr); | |
3119 | else | |
3120 | stream_put(s, &p_evpn_p->ip.ipaddr_v6, 16); | |
0af35d90 | 3121 | if (attr) { |
d62a17ae | 3122 | if (IS_IPADDR_V4(&p_evpn_p->ip)) |
3123 | stream_put_ipv4(s, | |
3124 | attr->evpn_overlay.gw_ip.ipv4.s_addr); | |
3125 | else | |
3126 | stream_put(s, &(attr->evpn_overlay.gw_ip.ipv6), 16); | |
3127 | } else { | |
3128 | if (IS_IPADDR_V4(&p_evpn_p->ip)) | |
3129 | stream_put_ipv4(s, 0); | |
3130 | else | |
3131 | stream_put(s, &temp, 16); | |
3132 | } | |
3133 | ||
b57ba6d2 | 3134 | if (num_labels) |
d62a17ae | 3135 | stream_put(s, label, 3); |
3136 | else | |
3137 | stream_put3(s, 0); | |
128ea8ab | 3138 | } |
3139 | ||
3140 | /* | |
3141 | * Cleanup specific VNI upon EVPN (advertise-all-vni) being disabled. | |
3142 | */ | |
d62a17ae | 3143 | static void cleanup_vni_on_disable(struct hash_backet *backet, struct bgp *bgp) |
128ea8ab | 3144 | { |
d62a17ae | 3145 | struct bgpevpn *vpn = (struct bgpevpn *)backet->data; |
128ea8ab | 3146 | |
d62a17ae | 3147 | /* Remove EVPN routes and schedule for processing. */ |
3148 | delete_routes_for_vni(bgp, vpn); | |
128ea8ab | 3149 | |
d62a17ae | 3150 | /* Clear "live" flag and see if hash needs to be freed. */ |
3151 | UNSET_FLAG(vpn->flags, VNI_FLAG_LIVE); | |
3152 | if (!is_vni_configured(vpn)) | |
3153 | bgp_evpn_free(bgp, vpn); | |
128ea8ab | 3154 | } |
3155 | ||
3156 | /* | |
3157 | * Free a VNI entry; iterator function called during cleanup. | |
3158 | */ | |
d62a17ae | 3159 | static void free_vni_entry(struct hash_backet *backet, struct bgp *bgp) |
128ea8ab | 3160 | { |
d62a17ae | 3161 | struct bgpevpn *vpn; |
128ea8ab | 3162 | |
d62a17ae | 3163 | vpn = (struct bgpevpn *)backet->data; |
3164 | delete_all_vni_routes(bgp, vpn); | |
3165 | bgp_evpn_free(bgp, vpn); | |
128ea8ab | 3166 | } |
3167 | ||
c581d8b0 MK |
3168 | /* |
3169 | * Derive AUTO import RT for BGP VRF - L3VNI | |
3170 | */ | |
3171 | static void evpn_auto_rt_import_add_for_vrf(struct bgp *bgp_vrf) | |
3172 | { | |
10ebe1ab MK |
3173 | struct bgp *bgp_def = NULL; |
3174 | ||
c581d8b0 | 3175 | form_auto_rt(bgp_vrf, bgp_vrf->l3vni, bgp_vrf->vrf_import_rtl); |
10ebe1ab MK |
3176 | UNSET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_IMPORT_RT_CFGD); |
3177 | ||
3178 | /* Map RT to VRF */ | |
3179 | bgp_def = bgp_get_default(); | |
3180 | if (!bgp_def) | |
3181 | return; | |
3182 | bgp_evpn_map_vrf_to_its_rts(bgp_vrf); | |
c581d8b0 MK |
3183 | } |
3184 | ||
3185 | /* | |
3186 | * Delete AUTO import RT from BGP VRF - L3VNI | |
3187 | */ | |
3188 | static void evpn_auto_rt_import_delete_for_vrf(struct bgp *bgp_vrf) | |
3189 | { | |
3190 | evpn_rt_delete_auto(bgp_vrf, bgp_vrf->l3vni, bgp_vrf->vrf_import_rtl); | |
3191 | } | |
3192 | ||
3193 | /* | |
3194 | * Derive AUTO export RT for BGP VRF - L3VNI | |
3195 | */ | |
3196 | static void evpn_auto_rt_export_add_for_vrf(struct bgp *bgp_vrf) | |
3197 | { | |
3198 | UNSET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_EXPORT_RT_CFGD); | |
3199 | form_auto_rt(bgp_vrf, bgp_vrf->l3vni, bgp_vrf->vrf_export_rtl); | |
3200 | } | |
3201 | ||
3202 | /* | |
3203 | * Delete AUTO export RT from BGP VRF - L3VNI | |
3204 | */ | |
3205 | static void evpn_auto_rt_export_delete_for_vrf(struct bgp *bgp_vrf) | |
3206 | { | |
3207 | evpn_rt_delete_auto(bgp_vrf, bgp_vrf->l3vni, bgp_vrf->vrf_export_rtl); | |
3208 | } | |
128ea8ab | 3209 | |
f1f8b53c MK |
3210 | static void bgp_evpn_handle_export_rt_change_for_vrf(struct bgp *bgp_vrf) |
3211 | { | |
3212 | struct bgp *bgp_def = NULL; | |
3213 | struct listnode *node = NULL; | |
3214 | struct bgpevpn *vpn = NULL; | |
3215 | ||
3216 | bgp_def = bgp_get_default(); | |
3217 | if (!bgp_def) | |
3218 | return; | |
3219 | ||
4992b4ae MK |
3220 | /* update all type-5 routes */ |
3221 | update_advertise_vrf_routes(bgp_vrf); | |
3222 | ||
3223 | /* update all type-2 routes */ | |
f1f8b53c MK |
3224 | for (ALL_LIST_ELEMENTS_RO(bgp_vrf->l2vnis, node, vpn)) |
3225 | update_routes_for_vni(bgp_def, vpn); | |
3226 | } | |
3227 | ||
128ea8ab | 3228 | /* |
3229 | * Public functions. | |
3230 | */ | |
3231 | ||
5424b7ba | 3232 | /* withdraw type-5 route corresponding to ip prefix */ |
31310b25 | 3233 | void bgp_evpn_withdraw_type5_route(struct bgp *bgp_vrf, struct prefix *p, |
5424b7ba MK |
3234 | afi_t afi, safi_t safi) |
3235 | { | |
3236 | int ret = 0; | |
3237 | struct prefix_evpn evp; | |
3238 | char buf[PREFIX_STRLEN]; | |
3239 | ||
31310b25 | 3240 | build_type5_prefix_from_ip_prefix(&evp, p); |
5424b7ba MK |
3241 | ret = delete_evpn_type5_route(bgp_vrf, &evp); |
3242 | if (ret) { | |
3243 | zlog_err( | |
996c9314 LB |
3244 | "%u failed to delete type-5 route for prefix %s in vrf %s", |
3245 | bgp_vrf->vrf_id, prefix2str(p, buf, sizeof(buf)), | |
3246 | vrf_id_to_name(bgp_vrf->vrf_id)); | |
5424b7ba MK |
3247 | } |
3248 | } | |
3249 | ||
342dd0c6 | 3250 | /* withdraw all type-5 routes for an address family */ |
996c9314 | 3251 | void bgp_evpn_withdraw_type5_routes(struct bgp *bgp_vrf, afi_t afi, safi_t safi) |
342dd0c6 | 3252 | { |
3253 | struct bgp_table *table = NULL; | |
3254 | struct bgp_node *rn = NULL; | |
25f2ca53 | 3255 | struct bgp_info *ri; |
342dd0c6 | 3256 | |
053905d2 | 3257 | table = bgp_vrf->rib[afi][safi]; |
25f2ca53 | 3258 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) { |
3259 | /* Only care about "selected" routes - non-imported. */ | |
3260 | /* TODO: Support for AddPath for EVPN. */ | |
3261 | for (ri = rn->info; ri; ri = ri->next) { | |
996c9314 LB |
3262 | if (CHECK_FLAG(ri->flags, BGP_INFO_SELECTED) |
3263 | && (!ri->extra || !ri->extra->parent)) { | |
25f2ca53 | 3264 | bgp_evpn_withdraw_type5_route(bgp_vrf, &rn->p, |
3265 | afi, safi); | |
3266 | break; | |
3267 | } | |
3268 | } | |
3269 | } | |
5424b7ba | 3270 | } |
342dd0c6 | 3271 | |
2f69f6d3 | 3272 | /* |
3273 | * Advertise IP prefix as type-5 route. The afi/safi and src_attr passed | |
3274 | * to this function correspond to those of the source IP prefix (best | |
3275 | * path in the case of the attr. In the case of a local prefix (when we | |
3276 | * are advertising local subnets), the src_attr will be NULL. | |
3277 | */ | |
31310b25 | 3278 | void bgp_evpn_advertise_type5_route(struct bgp *bgp_vrf, struct prefix *p, |
996c9314 LB |
3279 | struct attr *src_attr, afi_t afi, |
3280 | safi_t safi) | |
5424b7ba MK |
3281 | { |
3282 | int ret = 0; | |
3283 | struct prefix_evpn evp; | |
3284 | char buf[PREFIX_STRLEN]; | |
7b1bf203 | 3285 | |
31310b25 | 3286 | build_type5_prefix_from_ip_prefix(&evp, p); |
2f69f6d3 | 3287 | ret = update_evpn_type5_route(bgp_vrf, &evp, src_attr); |
3288 | if (ret) | |
996c9314 LB |
3289 | zlog_err("%u: Failed to create type-5 route for prefix %s", |
3290 | bgp_vrf->vrf_id, prefix2str(p, buf, sizeof(buf))); | |
342dd0c6 | 3291 | } |
3292 | ||
2f69f6d3 | 3293 | /* Inject all prefixes of a particular address-family (currently, IPv4 or |
3294 | * IPv6 unicast) into EVPN as type-5 routes. This is invoked when the | |
3295 | * advertisement is enabled. | |
3296 | */ | |
996c9314 LB |
3297 | void bgp_evpn_advertise_type5_routes(struct bgp *bgp_vrf, afi_t afi, |
3298 | safi_t safi) | |
342dd0c6 | 3299 | { |
3300 | struct bgp_table *table = NULL; | |
3301 | struct bgp_node *rn = NULL; | |
2f69f6d3 | 3302 | struct bgp_info *ri; |
342dd0c6 | 3303 | |
053905d2 | 3304 | table = bgp_vrf->rib[afi][safi]; |
31310b25 | 3305 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) { |
2f69f6d3 | 3306 | /* Need to identify the "selected" route entry to use its |
25f2ca53 | 3307 | * attribute. Also, we only consider "non-imported" routes. |
2f69f6d3 | 3308 | * TODO: Support for AddPath for EVPN. |
3309 | */ | |
3310 | for (ri = rn->info; ri; ri = ri->next) { | |
996c9314 LB |
3311 | if (CHECK_FLAG(ri->flags, BGP_INFO_SELECTED) |
3312 | && (!ri->extra || !ri->extra->parent)) { | |
53c84f78 MK |
3313 | |
3314 | /* apply the route-map */ | |
3315 | if (bgp_vrf->adv_cmd_rmap[afi][safi].map) { | |
3316 | int ret = 0; | |
3317 | ||
996c9314 LB |
3318 | ret = route_map_apply( |
3319 | bgp_vrf->adv_cmd_rmap[afi][safi] | |
3320 | .map, | |
3321 | &rn->p, RMAP_BGP, ri); | |
53c84f78 MK |
3322 | if (ret == RMAP_DENYMATCH) |
3323 | continue; | |
3324 | } | |
996c9314 LB |
3325 | bgp_evpn_advertise_type5_route( |
3326 | bgp_vrf, &rn->p, ri->attr, afi, safi); | |
2f69f6d3 | 3327 | break; |
3328 | } | |
3329 | } | |
31310b25 | 3330 | } |
342dd0c6 | 3331 | } |
3332 | ||
996c9314 | 3333 | void evpn_rt_delete_auto(struct bgp *bgp, vni_t vni, struct list *rtl) |
c581d8b0 MK |
3334 | { |
3335 | struct listnode *node, *nnode, *node_to_del; | |
3336 | struct ecommunity *ecom, *ecom_auto; | |
3337 | struct ecommunity_val eval; | |
3338 | ||
3339 | encode_route_target_as((bgp->as & 0xFFFF), vni, &eval); | |
3340 | ||
3341 | ecom_auto = ecommunity_new(); | |
3342 | ecommunity_add_val(ecom_auto, &eval); | |
3343 | node_to_del = NULL; | |
3344 | ||
3345 | for (ALL_LIST_ELEMENTS(rtl, node, nnode, ecom)) { | |
3346 | if (ecommunity_match(ecom, ecom_auto)) { | |
3347 | ecommunity_free(&ecom); | |
3348 | node_to_del = node; | |
3349 | } | |
3350 | } | |
3351 | ||
3352 | if (node_to_del) | |
3353 | list_delete_node(rtl, node_to_del); | |
3354 | ||
3355 | ecommunity_free(&ecom_auto); | |
3356 | } | |
3357 | ||
3358 | void bgp_evpn_configure_import_rt_for_vrf(struct bgp *bgp_vrf, | |
10ebe1ab | 3359 | struct ecommunity *ecomadd) |
c581d8b0 | 3360 | { |
5ba238b7 MK |
3361 | /* uninstall routes from vrf */ |
3362 | uninstall_routes_for_vrf(bgp_vrf); | |
10ebe1ab MK |
3363 | |
3364 | /* Cleanup the RT to VRF mapping */ | |
3365 | bgp_evpn_unmap_vrf_from_its_rts(bgp_vrf); | |
3366 | ||
c581d8b0 MK |
3367 | /* Remove auto generated RT */ |
3368 | evpn_auto_rt_import_delete_for_vrf(bgp_vrf); | |
3369 | ||
3370 | /* Add the newly configured RT to RT list */ | |
3371 | listnode_add_sort(bgp_vrf->vrf_import_rtl, ecomadd); | |
3372 | SET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_IMPORT_RT_CFGD); | |
3373 | ||
10ebe1ab MK |
3374 | /* map VRF to its RTs */ |
3375 | bgp_evpn_map_vrf_to_its_rts(bgp_vrf); | |
3376 | ||
5ba238b7 MK |
3377 | /* install routes matching the new VRF */ |
3378 | install_routes_for_vrf(bgp_vrf); | |
c581d8b0 MK |
3379 | } |
3380 | ||
3381 | void bgp_evpn_unconfigure_import_rt_for_vrf(struct bgp *bgp_vrf, | |
3382 | struct ecommunity *ecomdel) | |
3383 | { | |
3384 | struct listnode *node = NULL, *nnode = NULL, *node_to_del = NULL; | |
3385 | struct ecommunity *ecom = NULL; | |
3386 | ||
5ba238b7 MK |
3387 | /* uninstall routes from vrf */ |
3388 | uninstall_routes_for_vrf(bgp_vrf); | |
10ebe1ab MK |
3389 | |
3390 | /* Cleanup the RT to VRF mapping */ | |
3391 | bgp_evpn_unmap_vrf_from_its_rts(bgp_vrf); | |
3392 | ||
c581d8b0 MK |
3393 | /* remove the RT from the RT list */ |
3394 | for (ALL_LIST_ELEMENTS(bgp_vrf->vrf_import_rtl, node, nnode, ecom)) { | |
3395 | if (ecommunity_match(ecom, ecomdel)) { | |
3396 | ecommunity_free(&ecom); | |
3397 | node_to_del = node; | |
3398 | break; | |
3399 | } | |
3400 | } | |
3401 | ||
3402 | if (node_to_del) | |
3403 | list_delete_node(bgp_vrf->vrf_import_rtl, node_to_del); | |
3404 | ||
3405 | /* fallback to auto import rt, if this was the last RT */ | |
3406 | if (list_isempty(bgp_vrf->vrf_import_rtl)) { | |
3407 | UNSET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_IMPORT_RT_CFGD); | |
3408 | evpn_auto_rt_import_add_for_vrf(bgp_vrf); | |
3409 | } | |
3410 | ||
10ebe1ab MK |
3411 | /* map VRFs to its RTs */ |
3412 | bgp_evpn_map_vrf_to_its_rts(bgp_vrf); | |
3413 | ||
5ba238b7 MK |
3414 | /* install routes matching this new RT */ |
3415 | install_routes_for_vrf(bgp_vrf); | |
c581d8b0 MK |
3416 | } |
3417 | ||
3418 | void bgp_evpn_configure_export_rt_for_vrf(struct bgp *bgp_vrf, | |
3419 | struct ecommunity *ecomadd) | |
3420 | { | |
3421 | /* remove auto-generated RT */ | |
3422 | evpn_auto_rt_export_delete_for_vrf(bgp_vrf); | |
3423 | ||
3424 | /* Add the new RT to the RT list */ | |
3425 | listnode_add_sort(bgp_vrf->vrf_export_rtl, ecomadd); | |
3426 | SET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_EXPORT_RT_CFGD); | |
3427 | ||
f1f8b53c | 3428 | bgp_evpn_handle_export_rt_change_for_vrf(bgp_vrf); |
c581d8b0 MK |
3429 | } |
3430 | ||
3431 | void bgp_evpn_unconfigure_export_rt_for_vrf(struct bgp *bgp_vrf, | |
3432 | struct ecommunity *ecomdel) | |
3433 | { | |
3434 | struct listnode *node = NULL, *nnode = NULL, *node_to_del = NULL; | |
3435 | struct ecommunity *ecom = NULL; | |
3436 | ||
3437 | /* Remove the RT from the RT list */ | |
3438 | for (ALL_LIST_ELEMENTS(bgp_vrf->vrf_export_rtl, node, nnode, ecom)) { | |
3439 | if (ecommunity_match(ecom, ecomdel)) { | |
3440 | ecommunity_free(&ecom); | |
3441 | node_to_del = node; | |
3442 | break; | |
3443 | } | |
3444 | } | |
3445 | ||
3446 | if (node_to_del) | |
3447 | list_delete_node(bgp_vrf->vrf_export_rtl, node_to_del); | |
3448 | ||
3449 | /* fall back to auto-generated RT if this was the last RT */ | |
877702e7 | 3450 | if (bgp_vrf->vrf_export_rtl && list_isempty(bgp_vrf->vrf_export_rtl)) { |
c581d8b0 MK |
3451 | UNSET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_EXPORT_RT_CFGD); |
3452 | evpn_auto_rt_export_add_for_vrf(bgp_vrf); | |
3453 | } | |
3454 | ||
f1f8b53c | 3455 | bgp_evpn_handle_export_rt_change_for_vrf(bgp_vrf); |
c581d8b0 MK |
3456 | } |
3457 | ||
2d48ee25 | 3458 | /* |
3459 | * Handle change to BGP router id. This is invoked twice by the change | |
3460 | * handler, first before the router id has been changed and then after | |
3461 | * the router id has been changed. The first invocation will result in | |
676f83b9 | 3462 | * local routes for all VNIs/VRF being deleted and withdrawn and the next |
2d48ee25 | 3463 | * will result in the routes being re-advertised. |
3464 | */ | |
d62a17ae | 3465 | void bgp_evpn_handle_router_id_update(struct bgp *bgp, int withdraw) |
2d48ee25 | 3466 | { |
676f83b9 | 3467 | if (withdraw) { |
3468 | ||
3469 | /* delete and withdraw all the type-5 routes | |
523cafc4 | 3470 | stored in the global table for this vrf |
3471 | */ | |
80b140af | 3472 | withdraw_router_id_vrf(bgp); |
676f83b9 | 3473 | |
3474 | /* delete all the VNI routes (type-2/type-3) routes for all the | |
523cafc4 | 3475 | * L2-VNIs |
3476 | */ | |
d62a17ae | 3477 | hash_iterate(bgp->vnihash, |
3478 | (void (*)(struct hash_backet *, | |
3479 | void *))withdraw_router_id_vni, | |
3480 | bgp); | |
676f83b9 | 3481 | } else { |
3482 | ||
3483 | /* advertise all routes in the vrf as type-5 routes with the new | |
523cafc4 | 3484 | * RD |
3485 | */ | |
80b140af | 3486 | update_router_id_vrf(bgp); |
676f83b9 | 3487 | |
3488 | /* advertise all the VNI routes (type-2/type-3) routes with the | |
523cafc4 | 3489 | * new RD |
3490 | */ | |
d62a17ae | 3491 | hash_iterate(bgp->vnihash, |
3492 | (void (*)(struct hash_backet *, | |
3493 | void *))update_router_id_vni, | |
3494 | bgp); | |
676f83b9 | 3495 | } |
2d48ee25 | 3496 | } |
3497 | ||
90e60aa7 | 3498 | /* |
3499 | * Handle change to export RT - update and advertise local routes. | |
3500 | */ | |
d62a17ae | 3501 | int bgp_evpn_handle_export_rt_change(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 3502 | { |
d62a17ae | 3503 | return update_routes_for_vni(bgp, vpn); |
90e60aa7 | 3504 | } |
3505 | ||
996c9314 | 3506 | void bgp_evpn_handle_vrf_rd_change(struct bgp *bgp_vrf, int withdraw) |
676f83b9 | 3507 | { |
3508 | if (withdraw) | |
3509 | delete_withdraw_vrf_routes(bgp_vrf); | |
3510 | else | |
3511 | update_advertise_vrf_routes(bgp_vrf); | |
3512 | } | |
3513 | ||
90e60aa7 | 3514 | /* |
3515 | * Handle change to RD. This is invoked twice by the change handler, | |
3516 | * first before the RD has been changed and then after the RD has | |
3517 | * been changed. The first invocation will result in local routes | |
3518 | * of this VNI being deleted and withdrawn and the next will result | |
3519 | * in the routes being re-advertised. | |
3520 | */ | |
d62a17ae | 3521 | void bgp_evpn_handle_rd_change(struct bgp *bgp, struct bgpevpn *vpn, |
3522 | int withdraw) | |
90e60aa7 | 3523 | { |
d62a17ae | 3524 | if (withdraw) |
3525 | delete_withdraw_vni_routes(bgp, vpn); | |
3526 | else | |
3527 | update_advertise_vni_routes(bgp, vpn); | |
90e60aa7 | 3528 | } |
3529 | ||
3530 | /* | |
3531 | * Install routes for this VNI. Invoked upon change to Import RT. | |
3532 | */ | |
d62a17ae | 3533 | int bgp_evpn_install_routes(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 3534 | { |
d62a17ae | 3535 | return install_routes_for_vni(bgp, vpn); |
90e60aa7 | 3536 | } |
3537 | ||
3538 | /* | |
3539 | * Uninstall all routes installed for this VNI. Invoked upon change | |
3540 | * to Import RT. | |
3541 | */ | |
d62a17ae | 3542 | int bgp_evpn_uninstall_routes(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 3543 | { |
d62a17ae | 3544 | return uninstall_routes_for_vni(bgp, vpn); |
90e60aa7 | 3545 | } |
3546 | ||
b16031a2 | 3547 | /* |
b57ba6d2 | 3548 | * TODO: Hardcoded for a maximum of 2 VNIs right now |
b16031a2 | 3549 | */ |
996c9314 LB |
3550 | char *bgp_evpn_label2str(mpls_label_t *label, u_int32_t num_labels, char *buf, |
3551 | int len) | |
b16031a2 | 3552 | { |
b57ba6d2 | 3553 | vni_t vni1, vni2; |
b16031a2 | 3554 | |
b57ba6d2 MK |
3555 | vni1 = label2vni(label); |
3556 | if (num_labels == 2) { | |
996c9314 | 3557 | vni2 = label2vni(label + 1); |
b57ba6d2 MK |
3558 | snprintf(buf, len, "%u/%u", vni1, vni2); |
3559 | } else | |
3560 | snprintf(buf, len, "%u", vni1); | |
d62a17ae | 3561 | return buf; |
b16031a2 | 3562 | } |
3563 | ||
9c92b5f7 MK |
3564 | /* |
3565 | * Function to convert evpn route to json format. | |
3566 | * NOTE: We don't use prefix2str as the output here is a bit different. | |
3567 | */ | |
57f7feb6 | 3568 | void bgp_evpn_route2json(struct prefix_evpn *p, json_object *json) |
9c92b5f7 | 3569 | { |
b682f6de | 3570 | char buf1[ETHER_ADDR_STRLEN]; |
3571 | char buf2[PREFIX2STR_BUFFER]; | |
9c92b5f7 | 3572 | |
b682f6de | 3573 | if (!json) |
3574 | return; | |
9c92b5f7 | 3575 | |
dff8f48d | 3576 | if (p->prefix.route_type == BGP_EVPN_IMET_ROUTE) { |
b682f6de | 3577 | json_object_int_add(json, "routeType", p->prefix.route_type); |
3578 | json_object_int_add(json, "ethTag", 0); | |
57f7feb6 MK |
3579 | json_object_int_add(json, "ipLen", |
3580 | IS_EVPN_PREFIX_IPADDR_V4(p) | |
3581 | ? IPV4_MAX_BITLEN | |
3582 | : IPV6_MAX_BITLEN); | |
b682f6de | 3583 | json_object_string_add(json, "ip", |
57f7feb6 MK |
3584 | inet_ntoa(p->prefix.ip.ipaddr_v4)); |
3585 | } else if (p->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) { | |
dff8f48d | 3586 | if (IS_EVPN_PREFIX_IPADDR_NONE(p)) { |
57f7feb6 MK |
3587 | json_object_int_add(json, "routeType", |
3588 | p->prefix.route_type); | |
3589 | json_object_int_add( | |
3590 | json, "esi", | |
3591 | 0); /* TODO: we don't support esi yet */ | |
3592 | json_object_int_add(json, "ethTag", 0); | |
3593 | json_object_int_add(json, "macLen", 8 * ETH_ALEN); | |
3594 | json_object_string_add(json, "mac", | |
3595 | prefix_mac2str(&p->prefix.mac, | |
3596 | buf1, | |
3597 | sizeof(buf1))); | |
dff8f48d MK |
3598 | } else { |
3599 | u_char family; | |
3600 | ||
57f7feb6 MK |
3601 | family = IS_EVPN_PREFIX_IPADDR_V4(p) ? AF_INET |
3602 | : AF_INET6; | |
dff8f48d | 3603 | |
b682f6de | 3604 | json_object_int_add(json, "routeType", |
57f7feb6 MK |
3605 | p->prefix.route_type); |
3606 | json_object_int_add( | |
3607 | json, "esi", | |
3608 | 0); /* TODO: we don't support esi yet */ | |
b682f6de | 3609 | json_object_int_add(json, "ethTag", 0); |
57f7feb6 | 3610 | json_object_int_add(json, "macLen", 8 * ETH_ALEN); |
b682f6de | 3611 | json_object_string_add(json, "mac", |
57f7feb6 MK |
3612 | prefix_mac2str(&p->prefix.mac, |
3613 | buf1, | |
3614 | sizeof(buf1))); | |
b682f6de | 3615 | json_object_int_add(json, "ipLen", |
57f7feb6 MK |
3616 | IS_EVPN_PREFIX_IPADDR_V4(p) |
3617 | ? IPV4_MAX_BITLEN | |
3618 | : IPV6_MAX_BITLEN); | |
3619 | json_object_string_add( | |
3620 | json, "ip", | |
3621 | inet_ntop(family, &p->prefix.ip.ip.addr, buf2, | |
3622 | PREFIX2STR_BUFFER)); | |
dff8f48d MK |
3623 | } |
3624 | } else { | |
3625 | /* Currently, this is to cater to other AF_ETHERNET code. */ | |
3626 | } | |
9c92b5f7 MK |
3627 | } |
3628 | ||
520d5d76 | 3629 | /* |
3630 | * Function to convert evpn route to string. | |
3631 | * NOTE: We don't use prefix2str as the output here is a bit different. | |
3632 | */ | |
d62a17ae | 3633 | char *bgp_evpn_route2str(struct prefix_evpn *p, char *buf, int len) |
3634 | { | |
3635 | char buf1[ETHER_ADDR_STRLEN]; | |
3636 | char buf2[PREFIX2STR_BUFFER]; | |
3637 | ||
3638 | if (p->prefix.route_type == BGP_EVPN_IMET_ROUTE) { | |
3639 | snprintf(buf, len, "[%d]:[0]:[%d]:[%s]", p->prefix.route_type, | |
3640 | IS_EVPN_PREFIX_IPADDR_V4(p) ? IPV4_MAX_BITLEN | |
3641 | : IPV6_MAX_BITLEN, | |
3642 | inet_ntoa(p->prefix.ip.ipaddr_v4)); | |
3643 | } else if (p->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) { | |
3644 | if (IS_EVPN_PREFIX_IPADDR_NONE(p)) | |
3645 | snprintf(buf, len, "[%d]:[0]:[0]:[%d]:[%s]", | |
28328ea9 | 3646 | p->prefix.route_type, 8 * ETH_ALEN, |
d62a17ae | 3647 | prefix_mac2str(&p->prefix.mac, buf1, |
3648 | sizeof(buf1))); | |
3649 | else { | |
3650 | u_char family; | |
3651 | ||
3652 | family = IS_EVPN_PREFIX_IPADDR_V4(p) ? AF_INET | |
3653 | : AF_INET6; | |
3654 | snprintf(buf, len, "[%d]:[0]:[0]:[%d]:[%s]:[%d]:[%s]", | |
28328ea9 | 3655 | p->prefix.route_type, 8 * ETH_ALEN, |
d62a17ae | 3656 | prefix_mac2str(&p->prefix.mac, buf1, |
3657 | sizeof(buf1)), | |
3658 | family == AF_INET ? IPV4_MAX_BITLEN | |
3659 | : IPV6_MAX_BITLEN, | |
3660 | inet_ntop(family, &p->prefix.ip.ip.addr, buf2, | |
3661 | PREFIX2STR_BUFFER)); | |
3662 | } | |
342dd0c6 | 3663 | } else if (p->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE) { |
b3628c70 | 3664 | snprintf(buf, len, "[%d]:[0]:[0]:[%d]:[%s]", |
996c9314 LB |
3665 | p->prefix.route_type, p->prefix.ip_prefix_length, |
3666 | IS_EVPN_PREFIX_IPADDR_V4(p) | |
3667 | ? inet_ntoa(p->prefix.ip.ipaddr_v4) | |
3668 | : inet6_ntoa(p->prefix.ip.ipaddr_v6)); | |
d62a17ae | 3669 | } else { |
b03b8898 | 3670 | /* For EVPN route types not supported yet. */ |
f9aa3e55 QY |
3671 | snprintf(buf, len, "(unsupported route type %d)", |
3672 | p->prefix.route_type); | |
d62a17ae | 3673 | } |
3674 | ||
3675 | return (buf); | |
520d5d76 | 3676 | } |
3677 | ||
128ea8ab | 3678 | /* |
3679 | * Encode EVPN prefix in Update (MP_REACH) | |
3680 | */ | |
d62a17ae | 3681 | void bgp_evpn_encode_prefix(struct stream *s, struct prefix *p, |
996c9314 LB |
3682 | struct prefix_rd *prd, mpls_label_t *label, |
3683 | u_int32_t num_labels, struct attr *attr, | |
3684 | int addpath_encode, u_int32_t addpath_tx_id) | |
d62a17ae | 3685 | { |
3686 | struct prefix_evpn *evp = (struct prefix_evpn *)p; | |
b57ba6d2 | 3687 | int len, ipa_len = 0; |
d62a17ae | 3688 | |
3689 | if (addpath_encode) | |
3690 | stream_putl(s, addpath_tx_id); | |
3691 | ||
3692 | /* Route type */ | |
3693 | stream_putc(s, evp->prefix.route_type); | |
3694 | ||
3695 | switch (evp->prefix.route_type) { | |
3696 | case BGP_EVPN_MAC_IP_ROUTE: | |
3697 | if (IS_EVPN_PREFIX_IPADDR_V4(evp)) | |
3698 | ipa_len = IPV4_MAX_BYTELEN; | |
3699 | else if (IS_EVPN_PREFIX_IPADDR_V6(evp)) | |
3700 | ipa_len = IPV6_MAX_BYTELEN; | |
b57ba6d2 MK |
3701 | /* RD, ESI, EthTag, MAC+len, IP len, [IP], 1 VNI */ |
3702 | len = 8 + 10 + 4 + 1 + 6 + 1 + ipa_len + 3; | |
3703 | if (ipa_len && num_labels > 1) /* There are 2 VNIs */ | |
3704 | len += 3; | |
3705 | stream_putc(s, len); | |
996c9314 LB |
3706 | stream_put(s, prd->val, 8); /* RD */ |
3707 | stream_put(s, 0, 10); /* ESI */ | |
3708 | stream_putl(s, 0); /* Ethernet Tag ID */ | |
28328ea9 | 3709 | stream_putc(s, 8 * ETH_ALEN); /* Mac Addr Len - bits */ |
d62a17ae | 3710 | stream_put(s, evp->prefix.mac.octet, 6); /* Mac Addr */ |
3711 | stream_putc(s, 8 * ipa_len); /* IP address Length */ | |
996c9314 | 3712 | if (ipa_len) /* IP */ |
b57ba6d2 MK |
3713 | stream_put(s, &evp->prefix.ip.ip.addr, ipa_len); |
3714 | /* 1st label is the L2 VNI */ | |
3715 | stream_put(s, label, BGP_LABEL_BYTES); | |
3716 | /* Include 2nd label (L3 VNI) if advertising MAC+IP */ | |
3717 | if (ipa_len && num_labels > 1) | |
996c9314 | 3718 | stream_put(s, label + 1, BGP_LABEL_BYTES); |
d62a17ae | 3719 | break; |
3720 | ||
3721 | case BGP_EVPN_IMET_ROUTE: | |
3722 | stream_putc(s, 17); // TODO: length - assumes IPv4 address | |
3723 | stream_put(s, prd->val, 8); /* RD */ | |
3724 | stream_putl(s, 0); /* Ethernet Tag ID */ | |
3725 | stream_putc(s, IPV4_MAX_BITLEN); /* IP address Length - bits */ | |
3726 | /* Originating Router's IP Addr */ | |
3727 | stream_put_in_addr(s, &evp->prefix.ip.ipaddr_v4); | |
3728 | break; | |
3729 | ||
3730 | case BGP_EVPN_IP_PREFIX_ROUTE: | |
3731 | /* TODO: AddPath support. */ | |
b57ba6d2 | 3732 | evpn_mpattr_encode_type5(s, p, prd, label, num_labels, attr); |
d62a17ae | 3733 | break; |
3734 | ||
3735 | default: | |
3736 | break; | |
3737 | } | |
3738 | } | |
3739 | ||
3740 | int bgp_nlri_parse_evpn(struct peer *peer, struct attr *attr, | |
3741 | struct bgp_nlri *packet, int withdraw) | |
3742 | { | |
3743 | u_char *pnt; | |
3744 | u_char *lim; | |
3745 | afi_t afi; | |
3746 | safi_t safi; | |
3747 | u_int32_t addpath_id; | |
3748 | int addpath_encoded; | |
3749 | int psize = 0; | |
3750 | u_char rtype; | |
3751 | u_char rlen; | |
3752 | struct prefix p; | |
3753 | ||
d62a17ae | 3754 | /* Start processing the NLRI - there may be multiple in the MP_REACH */ |
3755 | pnt = packet->nlri; | |
3756 | lim = pnt + packet->length; | |
3757 | afi = packet->afi; | |
3758 | safi = packet->safi; | |
3759 | addpath_id = 0; | |
3760 | ||
3761 | addpath_encoded = | |
3762 | (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ADDPATH_AF_RX_ADV) | |
3763 | && CHECK_FLAG(peer->af_cap[afi][safi], | |
3764 | PEER_CAP_ADDPATH_AF_TX_RCV)); | |
3765 | ||
3766 | for (; pnt < lim; pnt += psize) { | |
3767 | /* Clear prefix structure. */ | |
3768 | memset(&p, 0, sizeof(struct prefix)); | |
3769 | ||
3770 | /* Deal with path-id if AddPath is supported. */ | |
3771 | if (addpath_encoded) { | |
3772 | /* When packet overflow occurs return immediately. */ | |
3773 | if (pnt + BGP_ADDPATH_ID_LEN > lim) | |
3774 | return -1; | |
3775 | ||
3776 | addpath_id = ntohl(*((uint32_t *)pnt)); | |
3777 | pnt += BGP_ADDPATH_ID_LEN; | |
3778 | } | |
3779 | ||
3780 | /* All EVPN NLRI types start with type and length. */ | |
3781 | if (pnt + 2 > lim) | |
3782 | return -1; | |
3783 | ||
3784 | rtype = *pnt++; | |
3785 | psize = rlen = *pnt++; | |
3786 | ||
3787 | /* When packet overflow occur return immediately. */ | |
3788 | if (pnt + psize > lim) | |
3789 | return -1; | |
3790 | ||
3791 | switch (rtype) { | |
3792 | case BGP_EVPN_MAC_IP_ROUTE: | |
3793 | if (process_type2_route(peer, afi, safi, | |
3794 | withdraw ? NULL : attr, pnt, | |
3795 | psize, addpath_id)) { | |
3796 | zlog_err( | |
3797 | "%u:%s - Error in processing EVPN type-2 NLRI size %d", | |
3798 | peer->bgp->vrf_id, peer->host, psize); | |
3799 | return -1; | |
3800 | } | |
3801 | break; | |
3802 | ||
3803 | case BGP_EVPN_IMET_ROUTE: | |
3804 | if (process_type3_route(peer, afi, safi, | |
3805 | withdraw ? NULL : attr, pnt, | |
3806 | psize, addpath_id)) { | |
3807 | zlog_err( | |
3808 | "%u:%s - Error in processing EVPN type-3 NLRI size %d", | |
3809 | peer->bgp->vrf_id, peer->host, psize); | |
3810 | return -1; | |
3811 | } | |
3812 | break; | |
3813 | ||
3814 | case BGP_EVPN_IP_PREFIX_ROUTE: | |
3815 | if (process_type5_route(peer, afi, safi, attr, pnt, | |
3816 | psize, addpath_id, withdraw)) { | |
3817 | zlog_err( | |
3818 | "%u:%s - Error in processing EVPN type-5 NLRI size %d", | |
3819 | peer->bgp->vrf_id, peer->host, psize); | |
3820 | return -1; | |
3821 | } | |
3822 | break; | |
3823 | ||
3824 | default: | |
3825 | break; | |
3826 | } | |
3827 | } | |
3828 | ||
3829 | /* Packet length consistency check. */ | |
3830 | if (pnt != lim) | |
3831 | return -1; | |
3832 | ||
3833 | return 0; | |
128ea8ab | 3834 | } |
3835 | ||
10ebe1ab MK |
3836 | /* |
3837 | * Map the RTs (configured or automatically derived) of a VRF to the VRF. | |
3838 | * The mapping will be used during route processing. | |
3839 | * bgp_def: default bgp instance | |
3840 | * bgp_vrf: specific bgp vrf instance on which RT is configured | |
3841 | */ | |
3842 | void bgp_evpn_map_vrf_to_its_rts(struct bgp *bgp_vrf) | |
3843 | { | |
3844 | int i = 0; | |
3845 | struct ecommunity_val *eval = NULL; | |
3846 | struct listnode *node = NULL, *nnode = NULL; | |
3847 | struct ecommunity *ecom = NULL; | |
3848 | ||
3849 | for (ALL_LIST_ELEMENTS(bgp_vrf->vrf_import_rtl, node, nnode, ecom)) { | |
3850 | for (i = 0; i < ecom->size; i++) { | |
3851 | eval = (struct ecommunity_val *)(ecom->val | |
3852 | + (i | |
3853 | * ECOMMUNITY_SIZE)); | |
3854 | map_vrf_to_rt(bgp_vrf, eval); | |
3855 | } | |
3856 | } | |
3857 | } | |
3858 | ||
3859 | /* | |
3860 | * Unmap the RTs (configured or automatically derived) of a VRF from the VRF. | |
3861 | */ | |
3862 | void bgp_evpn_unmap_vrf_from_its_rts(struct bgp *bgp_vrf) | |
3863 | { | |
3864 | int i; | |
3865 | struct ecommunity_val *eval; | |
3866 | struct listnode *node, *nnode; | |
3867 | struct ecommunity *ecom; | |
3868 | ||
3869 | for (ALL_LIST_ELEMENTS(bgp_vrf->vrf_import_rtl, node, nnode, ecom)) { | |
3870 | for (i = 0; i < ecom->size; i++) { | |
3871 | struct vrf_irt_node *irt; | |
3872 | struct ecommunity_val eval_tmp; | |
3873 | ||
3874 | eval = (struct ecommunity_val *)(ecom->val | |
3875 | + (i | |
3876 | * ECOMMUNITY_SIZE)); | |
3877 | /* If using "automatic" RT, we only care about the | |
3878 | * local-admin sub-field. | |
3879 | * This is to facilitate using VNI as the RT for EBGP | |
3880 | * peering too. | |
3881 | */ | |
3882 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
3883 | if (!CHECK_FLAG(bgp_vrf->vrf_flags, | |
3884 | BGP_VRF_IMPORT_RT_CFGD)) | |
3885 | mask_ecom_global_admin(&eval_tmp, eval); | |
3886 | ||
3887 | irt = lookup_vrf_import_rt(&eval_tmp); | |
3888 | if (irt) | |
3889 | unmap_vrf_from_rt(bgp_vrf, irt); | |
3890 | } | |
3891 | } | |
3892 | } | |
3893 | ||
3894 | ||
128ea8ab | 3895 | /* |
3896 | * Map the RTs (configured or automatically derived) of a VNI to the VNI. | |
3897 | * The mapping will be used during route processing. | |
3898 | */ | |
d62a17ae | 3899 | void bgp_evpn_map_vni_to_its_rts(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 3900 | { |
d62a17ae | 3901 | int i; |
3902 | struct ecommunity_val *eval; | |
3903 | struct listnode *node, *nnode; | |
3904 | struct ecommunity *ecom; | |
128ea8ab | 3905 | |
d62a17ae | 3906 | for (ALL_LIST_ELEMENTS(vpn->import_rtl, node, nnode, ecom)) { |
3907 | for (i = 0; i < ecom->size; i++) { | |
3908 | eval = (struct ecommunity_val *)(ecom->val | |
3909 | + (i | |
3910 | * ECOMMUNITY_SIZE)); | |
3911 | map_vni_to_rt(bgp, vpn, eval); | |
3912 | } | |
3913 | } | |
128ea8ab | 3914 | } |
3915 | ||
3916 | /* | |
3917 | * Unmap the RTs (configured or automatically derived) of a VNI from the VNI. | |
3918 | */ | |
d62a17ae | 3919 | void bgp_evpn_unmap_vni_from_its_rts(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 3920 | { |
d62a17ae | 3921 | int i; |
3922 | struct ecommunity_val *eval; | |
3923 | struct listnode *node, *nnode; | |
3924 | struct ecommunity *ecom; | |
128ea8ab | 3925 | |
d62a17ae | 3926 | for (ALL_LIST_ELEMENTS(vpn->import_rtl, node, nnode, ecom)) { |
3927 | for (i = 0; i < ecom->size; i++) { | |
3928 | struct irt_node *irt; | |
3929 | struct ecommunity_val eval_tmp; | |
128ea8ab | 3930 | |
d62a17ae | 3931 | eval = (struct ecommunity_val *)(ecom->val |
3932 | + (i | |
3933 | * ECOMMUNITY_SIZE)); | |
3934 | /* If using "automatic" RT, we only care about the | |
3935 | * local-admin sub-field. | |
3936 | * This is to facilitate using VNI as the RT for EBGP | |
3937 | * peering too. | |
3938 | */ | |
3939 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
3940 | if (!is_import_rt_configured(vpn)) | |
3941 | mask_ecom_global_admin(&eval_tmp, eval); | |
128ea8ab | 3942 | |
d62a17ae | 3943 | irt = lookup_import_rt(bgp, &eval_tmp); |
3944 | if (irt) | |
3945 | unmap_vni_from_rt(bgp, vpn, irt); | |
3946 | } | |
3947 | } | |
128ea8ab | 3948 | } |
3949 | ||
3950 | /* | |
3951 | * Derive Import RT automatically for VNI and map VNI to RT. | |
3952 | * The mapping will be used during route processing. | |
3953 | */ | |
d62a17ae | 3954 | void bgp_evpn_derive_auto_rt_import(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 3955 | { |
c581d8b0 | 3956 | form_auto_rt(bgp, vpn->vni, vpn->import_rtl); |
d62a17ae | 3957 | UNSET_FLAG(vpn->flags, VNI_FLAG_IMPRT_CFGD); |
128ea8ab | 3958 | |
d62a17ae | 3959 | /* Map RT to VNI */ |
3960 | bgp_evpn_map_vni_to_its_rts(bgp, vpn); | |
128ea8ab | 3961 | } |
3962 | ||
3963 | /* | |
3964 | * Derive Export RT automatically for VNI. | |
3965 | */ | |
d62a17ae | 3966 | void bgp_evpn_derive_auto_rt_export(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 3967 | { |
c581d8b0 | 3968 | form_auto_rt(bgp, vpn->vni, vpn->export_rtl); |
d62a17ae | 3969 | UNSET_FLAG(vpn->flags, VNI_FLAG_EXPRT_CFGD); |
128ea8ab | 3970 | } |
3971 | ||
676f83b9 | 3972 | /* |
3973 | * Derive RD automatically for VNI using passed information - it | |
3974 | * is of the form RouterId:unique-id-for-vni. | |
3975 | */ | |
3976 | void bgp_evpn_derive_auto_rd_for_vrf(struct bgp *bgp) | |
3977 | { | |
3978 | char buf[100]; | |
3979 | ||
3980 | bgp->vrf_prd.family = AF_UNSPEC; | |
3981 | bgp->vrf_prd.prefixlen = 64; | |
3982 | sprintf(buf, "%s:%hu", inet_ntoa(bgp->router_id), bgp->vrf_rd_id); | |
a1a5feed | 3983 | (void)str2prefix_rd(buf, &bgp->vrf_prd); |
676f83b9 | 3984 | } |
3985 | ||
128ea8ab | 3986 | /* |
3987 | * Derive RD automatically for VNI using passed information - it | |
3988 | * is of the form RouterId:unique-id-for-vni. | |
3989 | */ | |
d62a17ae | 3990 | void bgp_evpn_derive_auto_rd(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 3991 | { |
d62a17ae | 3992 | char buf[100]; |
128ea8ab | 3993 | |
d62a17ae | 3994 | vpn->prd.family = AF_UNSPEC; |
3995 | vpn->prd.prefixlen = 64; | |
3996 | sprintf(buf, "%s:%hu", inet_ntoa(bgp->router_id), vpn->rd_id); | |
cbb65f5e | 3997 | (void)str2prefix_rd(buf, &vpn->prd); |
d62a17ae | 3998 | UNSET_FLAG(vpn->flags, VNI_FLAG_RD_CFGD); |
128ea8ab | 3999 | } |
4000 | ||
4001 | /* | |
4002 | * Lookup VNI. | |
4003 | */ | |
d62a17ae | 4004 | struct bgpevpn *bgp_evpn_lookup_vni(struct bgp *bgp, vni_t vni) |
128ea8ab | 4005 | { |
d62a17ae | 4006 | struct bgpevpn *vpn; |
4007 | struct bgpevpn tmp; | |
128ea8ab | 4008 | |
d62a17ae | 4009 | memset(&tmp, 0, sizeof(struct bgpevpn)); |
4010 | tmp.vni = vni; | |
4011 | vpn = hash_lookup(bgp->vnihash, &tmp); | |
4012 | return vpn; | |
128ea8ab | 4013 | } |
4014 | ||
4015 | /* | |
4016 | * Create a new vpn - invoked upon configuration or zebra notification. | |
4017 | */ | |
d62a17ae | 4018 | struct bgpevpn *bgp_evpn_new(struct bgp *bgp, vni_t vni, |
29c53922 MK |
4019 | struct in_addr originator_ip, |
4020 | vrf_id_t tenant_vrf_id) | |
128ea8ab | 4021 | { |
d62a17ae | 4022 | struct bgpevpn *vpn; |
128ea8ab | 4023 | |
d62a17ae | 4024 | if (!bgp) |
4025 | return NULL; | |
128ea8ab | 4026 | |
d62a17ae | 4027 | vpn = XCALLOC(MTYPE_BGP_EVPN, sizeof(struct bgpevpn)); |
4028 | if (!vpn) | |
4029 | return NULL; | |
128ea8ab | 4030 | |
d62a17ae | 4031 | /* Set values - RD and RT set to defaults. */ |
4032 | vpn->vni = vni; | |
4033 | vpn->originator_ip = originator_ip; | |
29c53922 | 4034 | vpn->tenant_vrf_id = tenant_vrf_id; |
128ea8ab | 4035 | |
d62a17ae | 4036 | /* Initialize route-target import and export lists */ |
4037 | vpn->import_rtl = list_new(); | |
4038 | vpn->import_rtl->cmp = (int (*)(void *, void *))evpn_route_target_cmp; | |
4039 | vpn->export_rtl = list_new(); | |
4040 | vpn->export_rtl->cmp = (int (*)(void *, void *))evpn_route_target_cmp; | |
e9eb5f63 | 4041 | bf_assign_index(bm->rd_idspace, vpn->rd_id); |
d62a17ae | 4042 | derive_rd_rt_for_vni(bgp, vpn); |
128ea8ab | 4043 | |
d62a17ae | 4044 | /* Initialize EVPN route table. */ |
4045 | vpn->route_table = bgp_table_init(AFI_L2VPN, SAFI_EVPN); | |
128ea8ab | 4046 | |
d62a17ae | 4047 | /* Add to hash */ |
4048 | if (!hash_get(bgp->vnihash, vpn, hash_alloc_intern)) { | |
4049 | XFREE(MTYPE_BGP_EVPN, vpn); | |
4050 | return NULL; | |
4051 | } | |
6a8657d0 MK |
4052 | |
4053 | /* add to l2vni list on corresponding vrf */ | |
4054 | bgpevpn_link_to_l3vni(vpn); | |
4055 | ||
d62a17ae | 4056 | QOBJ_REG(vpn, bgpevpn); |
4057 | return vpn; | |
128ea8ab | 4058 | } |
4059 | ||
4060 | /* | |
4061 | * Free a given VPN - called in multiple scenarios such as zebra | |
4062 | * notification, configuration being deleted, advertise-all-vni disabled etc. | |
4063 | * This just frees appropriate memory, caller should have taken other | |
4064 | * needed actions. | |
4065 | */ | |
d62a17ae | 4066 | void bgp_evpn_free(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 4067 | { |
6a8657d0 | 4068 | bgpevpn_unlink_from_l3vni(vpn); |
d62a17ae | 4069 | bgp_table_unlock(vpn->route_table); |
4070 | bgp_evpn_unmap_vni_from_its_rts(bgp, vpn); | |
affe9e99 DS |
4071 | list_delete_and_null(&vpn->import_rtl); |
4072 | list_delete_and_null(&vpn->export_rtl); | |
e9eb5f63 | 4073 | bf_release_index(bm->rd_idspace, vpn->rd_id); |
d62a17ae | 4074 | hash_release(bgp->vnihash, vpn); |
4075 | QOBJ_UNREG(vpn); | |
4076 | XFREE(MTYPE_BGP_EVPN, vpn); | |
128ea8ab | 4077 | } |
4078 | ||
4079 | /* | |
4080 | * Import route into matching VNI(s). | |
4081 | */ | |
d62a17ae | 4082 | int bgp_evpn_import_route(struct bgp *bgp, afi_t afi, safi_t safi, |
4083 | struct prefix *p, struct bgp_info *ri) | |
128ea8ab | 4084 | { |
d62a17ae | 4085 | return install_uninstall_evpn_route(bgp, afi, safi, p, ri, 1); |
128ea8ab | 4086 | } |
4087 | ||
4088 | /* | |
4089 | * Unimport route from matching VNI(s). | |
4090 | */ | |
d62a17ae | 4091 | int bgp_evpn_unimport_route(struct bgp *bgp, afi_t afi, safi_t safi, |
4092 | struct prefix *p, struct bgp_info *ri) | |
128ea8ab | 4093 | { |
d62a17ae | 4094 | return install_uninstall_evpn_route(bgp, afi, safi, p, ri, 0); |
128ea8ab | 4095 | } |
4096 | ||
db0e1937 MK |
4097 | /* filter routes which have martian next hops */ |
4098 | int bgp_filter_evpn_routes_upon_martian_nh_change(struct bgp *bgp) | |
4099 | { | |
0291c246 MK |
4100 | afi_t afi; |
4101 | safi_t safi; | |
4102 | struct bgp_node *rd_rn, *rn; | |
4103 | struct bgp_table *table; | |
4104 | struct bgp_info *ri; | |
db0e1937 MK |
4105 | |
4106 | afi = AFI_L2VPN; | |
4107 | safi = SAFI_EVPN; | |
4108 | ||
4109 | /* Walk entire global routing table and evaluate routes which could be | |
4110 | * imported into this VPN. Note that we cannot just look at the routes | |
4111 | * for the VNI's RD - | |
4112 | * remote routes applicable for this VNI could have any RD. | |
4113 | */ | |
4114 | /* EVPN routes are a 2-level table. */ | |
4115 | for (rd_rn = bgp_table_top(bgp->rib[afi][safi]); rd_rn; | |
4116 | rd_rn = bgp_route_next(rd_rn)) { | |
4117 | table = (struct bgp_table *)(rd_rn->info); | |
4118 | if (!table) | |
4119 | continue; | |
4120 | ||
4121 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) { | |
4122 | ||
4123 | for (ri = rn->info; ri; ri = ri->next) { | |
4124 | ||
4125 | /* Consider "valid" remote routes applicable for | |
4126 | * this VNI. */ | |
4127 | if (!(ri->type == ZEBRA_ROUTE_BGP | |
4128 | && ri->sub_type == BGP_ROUTE_NORMAL)) | |
4129 | continue; | |
4130 | ||
60466a63 | 4131 | if (bgp_nexthop_self(bgp, ri->attr->nexthop)) { |
db0e1937 MK |
4132 | |
4133 | char attr_str[BUFSIZ]; | |
4134 | char pbuf[PREFIX_STRLEN]; | |
4135 | ||
4136 | bgp_dump_attr(ri->attr, attr_str, | |
4137 | BUFSIZ); | |
4138 | ||
4139 | if (bgp_debug_update(ri->peer, &rn->p, | |
4140 | NULL, 1)) | |
4141 | zlog_debug( | |
b682f6de | 4142 | "%u: prefix %s with attr %s - DENIED due to martian or self nexthop", |
db0e1937 MK |
4143 | bgp->vrf_id, |
4144 | prefix2str( | |
60466a63 | 4145 | &rn->p, pbuf, |
db0e1937 MK |
4146 | sizeof(pbuf)), |
4147 | attr_str); | |
4148 | ||
4149 | bgp_evpn_unimport_route(bgp, afi, safi, | |
4150 | &rn->p, ri); | |
4151 | ||
60466a63 QY |
4152 | bgp_rib_remove(rn, ri, ri->peer, afi, |
4153 | safi); | |
db0e1937 | 4154 | } |
db0e1937 MK |
4155 | } |
4156 | } | |
4157 | } | |
4158 | ||
4159 | return 0; | |
4160 | } | |
4161 | ||
128ea8ab | 4162 | /* |
4163 | * Handle del of a local MACIP. | |
4164 | */ | |
d62a17ae | 4165 | int bgp_evpn_local_macip_del(struct bgp *bgp, vni_t vni, struct ethaddr *mac, |
4166 | struct ipaddr *ip) | |
128ea8ab | 4167 | { |
d62a17ae | 4168 | struct bgpevpn *vpn; |
4169 | struct prefix_evpn p; | |
128ea8ab | 4170 | |
d62a17ae | 4171 | if (!bgp->vnihash) { |
4172 | zlog_err("%u: VNI hash not created", bgp->vrf_id); | |
4173 | return -1; | |
4174 | } | |
128ea8ab | 4175 | |
d62a17ae | 4176 | /* Lookup VNI hash - should exist. */ |
4177 | vpn = bgp_evpn_lookup_vni(bgp, vni); | |
4178 | if (!vpn || !is_vni_live(vpn)) { | |
4179 | zlog_warn("%u: VNI hash entry for VNI %u %s at MACIP DEL", | |
4180 | bgp->vrf_id, vni, vpn ? "not live" : "not found"); | |
4181 | return -1; | |
4182 | } | |
128ea8ab | 4183 | |
d62a17ae | 4184 | /* Remove EVPN type-2 route and schedule for processing. */ |
4185 | build_evpn_type2_prefix(&p, mac, ip); | |
4186 | delete_evpn_route(bgp, vpn, &p); | |
128ea8ab | 4187 | |
d62a17ae | 4188 | return 0; |
128ea8ab | 4189 | } |
4190 | ||
4191 | /* | |
4192 | * Handle add of a local MACIP. | |
4193 | */ | |
d62a17ae | 4194 | int bgp_evpn_local_macip_add(struct bgp *bgp, vni_t vni, struct ethaddr *mac, |
1a98c087 | 4195 | struct ipaddr *ip, u_char flags) |
128ea8ab | 4196 | { |
d62a17ae | 4197 | struct bgpevpn *vpn; |
4198 | struct prefix_evpn p; | |
128ea8ab | 4199 | |
d62a17ae | 4200 | if (!bgp->vnihash) { |
4201 | zlog_err("%u: VNI hash not created", bgp->vrf_id); | |
4202 | return -1; | |
4203 | } | |
128ea8ab | 4204 | |
d62a17ae | 4205 | /* Lookup VNI hash - should exist. */ |
4206 | vpn = bgp_evpn_lookup_vni(bgp, vni); | |
4207 | if (!vpn || !is_vni_live(vpn)) { | |
4208 | zlog_warn("%u: VNI hash entry for VNI %u %s at MACIP ADD", | |
4209 | bgp->vrf_id, vni, vpn ? "not live" : "not found"); | |
4210 | return -1; | |
4211 | } | |
128ea8ab | 4212 | |
d62a17ae | 4213 | /* Create EVPN type-2 route and schedule for processing. */ |
4214 | build_evpn_type2_prefix(&p, mac, ip); | |
1a98c087 | 4215 | if (update_evpn_route(bgp, vpn, &p, flags)) { |
d62a17ae | 4216 | char buf[ETHER_ADDR_STRLEN]; |
4217 | char buf2[INET6_ADDRSTRLEN]; | |
128ea8ab | 4218 | |
d62a17ae | 4219 | zlog_err( |
ead40654 | 4220 | "%u:Failed to create Type-2 route, VNI %u %s MAC %s IP %s (flags: 0x%x)", |
1a98c087 | 4221 | bgp->vrf_id, vpn->vni, |
996c9314 LB |
4222 | CHECK_FLAG(flags, ZEBRA_MACIP_TYPE_STICKY) |
4223 | ? "sticky gateway" | |
4224 | : "", | |
d62a17ae | 4225 | prefix_mac2str(mac, buf, sizeof(buf)), |
996c9314 | 4226 | ipaddr2str(ip, buf2, sizeof(buf2)), flags); |
d62a17ae | 4227 | return -1; |
4228 | } | |
128ea8ab | 4229 | |
d62a17ae | 4230 | return 0; |
128ea8ab | 4231 | } |
4232 | ||
6a8657d0 MK |
4233 | static void link_l2vni_hash_to_l3vni(struct hash_backet *backet, |
4234 | struct bgp *bgp_vrf) | |
4235 | { | |
4236 | struct bgpevpn *vpn = NULL; | |
4237 | struct bgp *bgp_def = NULL; | |
4238 | ||
4239 | bgp_def = bgp_get_default(); | |
4240 | assert(bgp_def); | |
4241 | ||
4242 | vpn = (struct bgpevpn *)backet->data; | |
4243 | if (vpn->tenant_vrf_id == bgp_vrf->vrf_id) | |
4244 | bgpevpn_link_to_l3vni(vpn); | |
4245 | } | |
4246 | ||
996c9314 LB |
4247 | int bgp_evpn_local_l3vni_add(vni_t l3vni, vrf_id_t vrf_id, struct ethaddr *rmac, |
4248 | struct in_addr originator_ip, int filter) | |
fe1dc5a3 MK |
4249 | { |
4250 | struct bgp *bgp_vrf = NULL; /* bgp VRF instance */ | |
4251 | struct bgp *bgp_def = NULL; /* default bgp instance */ | |
f1f8b53c MK |
4252 | struct listnode *node = NULL; |
4253 | struct bgpevpn *vpn = NULL; | |
fe1dc5a3 MK |
4254 | as_t as = 0; |
4255 | ||
4256 | /* get the default instamce - required to get the AS number for VRF | |
523cafc4 | 4257 | * auto-creatio |
4258 | */ | |
fe1dc5a3 MK |
4259 | bgp_def = bgp_get_default(); |
4260 | if (!bgp_def) { | |
996c9314 LB |
4261 | zlog_err( |
4262 | "Cannot process L3VNI %u ADD - default BGP instance not yet created", | |
4263 | l3vni); | |
fe1dc5a3 MK |
4264 | return -1; |
4265 | } | |
4266 | as = bgp_def->as; | |
4267 | ||
4268 | /* if the BGP vrf instance doesnt exist - create one */ | |
0b5131c9 | 4269 | bgp_vrf = bgp_lookup_by_name(vrf_id_to_name(vrf_id)); |
fe1dc5a3 MK |
4270 | if (!bgp_vrf) { |
4271 | ||
4272 | int ret = 0; | |
4273 | ||
4274 | ret = bgp_get(&bgp_vrf, &as, vrf_id_to_name(vrf_id), | |
4275 | BGP_INSTANCE_TYPE_VRF); | |
4276 | switch (ret) { | |
4277 | case BGP_ERR_MULTIPLE_INSTANCE_NOT_SET: | |
4278 | zlog_err("'bgp multiple-instance' not present\n"); | |
4279 | return -1; | |
4280 | case BGP_ERR_AS_MISMATCH: | |
4281 | zlog_err("BGP is already running; AS is %u\n", as); | |
4282 | return -1; | |
4283 | case BGP_ERR_INSTANCE_MISMATCH: | |
4284 | zlog_err("BGP instance name and AS number mismatch\n"); | |
4285 | return -1; | |
4286 | } | |
4287 | ||
4288 | /* mark as auto created */ | |
4289 | SET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_AUTO); | |
4290 | } | |
4291 | ||
4292 | /* associate with l3vni */ | |
4293 | bgp_vrf->l3vni = l3vni; | |
4294 | ||
4295 | /* set the router mac - to be used in mac-ip routes for this vrf */ | |
4296 | memcpy(&bgp_vrf->rmac, rmac, sizeof(struct ethaddr)); | |
4297 | ||
b67a60d2 | 4298 | /* set the originator ip */ |
4299 | bgp_vrf->originator_ip = originator_ip; | |
4300 | ||
c48d9f5f MK |
4301 | /* set the right filter - are we using l3vni only for prefix routes? */ |
4302 | if (filter) | |
4303 | SET_FLAG(bgp_vrf->vrf_flags, BGP_VRF_L3VNI_PREFIX_ROUTES_ONLY); | |
4304 | ||
c581d8b0 MK |
4305 | /* auto derive RD/RT */ |
4306 | if (!CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_IMPORT_RT_CFGD)) | |
4307 | evpn_auto_rt_import_add_for_vrf(bgp_vrf); | |
4308 | if (!CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_EXPORT_RT_CFGD)) | |
4309 | evpn_auto_rt_export_add_for_vrf(bgp_vrf); | |
676f83b9 | 4310 | bgp_evpn_derive_auto_rd_for_vrf(bgp_vrf); |
fe1dc5a3 | 4311 | |
6a8657d0 MK |
4312 | /* link all corresponding l2vnis */ |
4313 | hash_iterate(bgp_def->vnihash, | |
996c9314 LB |
4314 | (void (*)(struct hash_backet *, |
4315 | void *))link_l2vni_hash_to_l3vni, | |
6a8657d0 MK |
4316 | bgp_vrf); |
4317 | ||
c48d9f5f MK |
4318 | /* Only update all corresponding type-2 routes if we are advertising two |
4319 | * labels along with type-2 routes | |
4320 | */ | |
4321 | if (!filter) | |
4322 | for (ALL_LIST_ELEMENTS_RO(bgp_vrf->l2vnis, node, vpn)) | |
4323 | update_routes_for_vni(bgp_def, vpn); | |
fe1dc5a3 | 4324 | |
06d2e8f3 MK |
4325 | /* advertise type-5 routes if needed */ |
4326 | update_advertise_vrf_routes(bgp_vrf); | |
4327 | ||
5ba238b7 MK |
4328 | /* install all remote routes belonging to this l3vni into correspondng |
4329 | * vrf */ | |
4330 | install_routes_for_vrf(bgp_vrf); | |
fe1dc5a3 MK |
4331 | |
4332 | return 0; | |
4333 | } | |
4334 | ||
996c9314 | 4335 | int bgp_evpn_local_l3vni_del(vni_t l3vni, vrf_id_t vrf_id) |
fe1dc5a3 MK |
4336 | { |
4337 | struct bgp *bgp_vrf = NULL; /* bgp vrf instance */ | |
f1f8b53c MK |
4338 | struct bgp *bgp_def = NULL; /* default bgp instance */ |
4339 | struct listnode *node = NULL; | |
4340 | struct bgpevpn *vpn = NULL; | |
fe1dc5a3 MK |
4341 | |
4342 | bgp_vrf = bgp_lookup_by_vrf_id(vrf_id); | |
4343 | if (!bgp_vrf) { | |
996c9314 LB |
4344 | zlog_err( |
4345 | "Cannot process L3VNI %u Del - Could not find BGP instance", | |
4346 | l3vni); | |
fe1dc5a3 MK |
4347 | return -1; |
4348 | } | |
4349 | ||
f1f8b53c MK |
4350 | bgp_def = bgp_get_default(); |
4351 | if (!bgp_def) { | |
996c9314 LB |
4352 | zlog_err( |
4353 | "Cannot process L3VNI %u Del - Could not find default BGP instance", | |
4354 | l3vni); | |
f1f8b53c MK |
4355 | return -1; |
4356 | } | |
4357 | ||
1eb88002 | 4358 | /* unimport remote routes from VRF, if it is AUTO vrf bgp_delete will |
523cafc4 | 4359 | * take care of uninstalling the routes from zebra |
4360 | */ | |
1eb88002 MK |
4361 | if (!CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_AUTO)) |
4362 | uninstall_routes_for_vrf(bgp_vrf); | |
5ba238b7 | 4363 | |
06d2e8f3 MK |
4364 | /* delete/withdraw all type-5 routes */ |
4365 | delete_withdraw_vrf_routes(bgp_vrf); | |
4366 | ||
fe1dc5a3 MK |
4367 | /* remove the l3vni from vrf instance */ |
4368 | bgp_vrf->l3vni = 0; | |
4369 | ||
4370 | /* remove the Rmac from the BGP vrf */ | |
4371 | memset(&bgp_vrf->rmac, 0, sizeof(struct ethaddr)); | |
4372 | ||
c581d8b0 | 4373 | /* delete RD/RT */ |
23a06e11 | 4374 | if (bgp_vrf->vrf_import_rtl && !list_isempty(bgp_vrf->vrf_import_rtl)) { |
10ebe1ab | 4375 | bgp_evpn_unmap_vrf_from_its_rts(bgp_vrf); |
5ba238b7 | 4376 | list_delete_all_node(bgp_vrf->vrf_import_rtl); |
23a06e11 MK |
4377 | } |
4378 | if (bgp_vrf->vrf_export_rtl && !list_isempty(bgp_vrf->vrf_export_rtl)) { | |
5ba238b7 | 4379 | list_delete_all_node(bgp_vrf->vrf_export_rtl); |
23a06e11 | 4380 | } |
fe1dc5a3 | 4381 | |
f1f8b53c | 4382 | /* update all corresponding local mac-ip routes */ |
c48d9f5f MK |
4383 | if (!CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_L3VNI_PREFIX_ROUTES_ONLY)) { |
4384 | for (ALL_LIST_ELEMENTS_RO(bgp_vrf->l2vnis, node, vpn)) { | |
4385 | UNSET_FLAG(vpn->flags, VNI_FLAG_USE_TWO_LABELS); | |
4386 | update_routes_for_vni(bgp_def, vpn); | |
4387 | } | |
4388 | } | |
fe1dc5a3 MK |
4389 | |
4390 | /* Delete the instance if it was autocreated */ | |
4391 | if (CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_AUTO)) | |
4392 | bgp_delete(bgp_vrf); | |
4393 | ||
4394 | return 0; | |
4395 | } | |
4396 | ||
128ea8ab | 4397 | /* |
4398 | * Handle del of a local VNI. | |
4399 | */ | |
d62a17ae | 4400 | int bgp_evpn_local_vni_del(struct bgp *bgp, vni_t vni) |
128ea8ab | 4401 | { |
d62a17ae | 4402 | struct bgpevpn *vpn; |
128ea8ab | 4403 | |
d62a17ae | 4404 | if (!bgp->vnihash) { |
4405 | zlog_err("%u: VNI hash not created", bgp->vrf_id); | |
4406 | return -1; | |
4407 | } | |
128ea8ab | 4408 | |
d62a17ae | 4409 | /* Locate VNI hash */ |
4410 | vpn = bgp_evpn_lookup_vni(bgp, vni); | |
4411 | if (!vpn) { | |
4412 | zlog_warn("%u: VNI hash entry for VNI %u not found at DEL", | |
4413 | bgp->vrf_id, vni); | |
4414 | return 0; | |
4415 | } | |
128ea8ab | 4416 | |
d62a17ae | 4417 | /* Remove all local EVPN routes and schedule for processing (to |
4418 | * withdraw from peers). | |
4419 | */ | |
4420 | delete_routes_for_vni(bgp, vpn); | |
128ea8ab | 4421 | |
db0e1937 MK |
4422 | /* |
4423 | * tunnel is no longer active, del tunnel ip address from tip_hash | |
4424 | */ | |
4425 | bgp_tip_del(bgp, &vpn->originator_ip); | |
4426 | ||
d62a17ae | 4427 | /* Clear "live" flag and see if hash needs to be freed. */ |
4428 | UNSET_FLAG(vpn->flags, VNI_FLAG_LIVE); | |
4429 | if (!is_vni_configured(vpn)) | |
4430 | bgp_evpn_free(bgp, vpn); | |
128ea8ab | 4431 | |
d62a17ae | 4432 | return 0; |
128ea8ab | 4433 | } |
4434 | ||
4435 | /* | |
d1911c26 | 4436 | * Handle add (or update) of a local VNI. The VNI changes we care |
4437 | * about are for the local-tunnel-ip and the (tenant) VRF. | |
128ea8ab | 4438 | */ |
d62a17ae | 4439 | int bgp_evpn_local_vni_add(struct bgp *bgp, vni_t vni, |
996c9314 | 4440 | struct in_addr originator_ip, vrf_id_t tenant_vrf_id) |
d62a17ae | 4441 | { |
4442 | struct bgpevpn *vpn; | |
4443 | struct prefix_evpn p; | |
4444 | ||
4445 | if (!bgp->vnihash) { | |
4446 | zlog_err("%u: VNI hash not created", bgp->vrf_id); | |
4447 | return -1; | |
4448 | } | |
4449 | ||
4450 | /* Lookup VNI. If present and no change, exit. */ | |
4451 | vpn = bgp_evpn_lookup_vni(bgp, vni); | |
ddd16ed5 | 4452 | if (vpn) { |
29c53922 | 4453 | |
d1911c26 | 4454 | if (is_vni_live(vpn) |
4455 | && IPV4_ADDR_SAME(&vpn->originator_ip, &originator_ip) | |
4456 | && vpn->tenant_vrf_id == tenant_vrf_id) | |
4457 | /* Probably some other param has changed that we don't | |
4458 | * care about. */ | |
4459 | return 0; | |
4460 | ||
4461 | /* Update tenant_vrf_id if it has changed. */ | |
6a8657d0 MK |
4462 | if (vpn->tenant_vrf_id != tenant_vrf_id) { |
4463 | bgpevpn_unlink_from_l3vni(vpn); | |
29c53922 | 4464 | vpn->tenant_vrf_id = tenant_vrf_id; |
6a8657d0 MK |
4465 | bgpevpn_link_to_l3vni(vpn); |
4466 | } | |
29c53922 | 4467 | |
d1911c26 | 4468 | /* If tunnel endpoint IP has changed, update (and delete prior |
4469 | * type-3 route, if needed.) | |
4470 | */ | |
4471 | if (!IPV4_ADDR_SAME(&vpn->originator_ip, &originator_ip)) | |
4472 | handle_tunnel_ip_change(bgp, vpn, originator_ip); | |
d62a17ae | 4473 | |
d1911c26 | 4474 | /* Update all routes with new endpoint IP and/or export RT |
4475 | * for VRFs | |
4476 | */ | |
4477 | if (is_vni_live(vpn)) | |
4478 | update_routes_for_vni(bgp, vpn); | |
d62a17ae | 4479 | } |
4480 | ||
4481 | /* Create or update as appropriate. */ | |
4482 | if (!vpn) { | |
29c53922 | 4483 | vpn = bgp_evpn_new(bgp, vni, originator_ip, tenant_vrf_id); |
d62a17ae | 4484 | if (!vpn) { |
4485 | zlog_err( | |
4486 | "%u: Failed to allocate VNI entry for VNI %u - at Add", | |
4487 | bgp->vrf_id, vni); | |
4488 | return -1; | |
4489 | } | |
4490 | } | |
4491 | ||
db0e1937 | 4492 | /* if the VNI is live already, there is nothing more to do */ |
ddd16ed5 MK |
4493 | if (is_vni_live(vpn)) |
4494 | return 0; | |
4495 | ||
d62a17ae | 4496 | /* Mark as "live" */ |
4497 | SET_FLAG(vpn->flags, VNI_FLAG_LIVE); | |
4498 | ||
db0e1937 MK |
4499 | /* tunnel is now active, add tunnel-ip to db */ |
4500 | bgp_tip_add(bgp, &originator_ip); | |
4501 | ||
4502 | /* filter routes as nexthop database has changed */ | |
4503 | bgp_filter_evpn_routes_upon_martian_nh_change(bgp); | |
4504 | ||
d62a17ae | 4505 | /* Create EVPN type-3 route and schedule for processing. */ |
4506 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
4507 | if (update_evpn_route(bgp, vpn, &p, 0)) { | |
4508 | zlog_err("%u: Type3 route creation failure for VNI %u", | |
4509 | bgp->vrf_id, vni); | |
4510 | return -1; | |
4511 | } | |
4512 | ||
4513 | /* If we have learnt and retained remote routes (VTEPs, MACs) for this | |
4514 | * VNI, | |
4515 | * install them. | |
4516 | */ | |
4517 | install_routes_for_vni(bgp, vpn); | |
4518 | ||
d7d97010 MK |
4519 | /* If we are advertising gateway mac-ip |
4520 | It needs to be conveyed again to zebra */ | |
4521 | bgp_zebra_advertise_gw_macip(bgp, vpn->advertise_gw_macip, vpn->vni); | |
4522 | ||
d62a17ae | 4523 | return 0; |
b18825eb | 4524 | } |
14c1a7bf | 4525 | |
7724c0a1 | 4526 | /* |
4527 | * Cleanup EVPN information on disable - Need to delete and withdraw | |
4528 | * EVPN routes from peers. | |
4529 | */ | |
d62a17ae | 4530 | void bgp_evpn_cleanup_on_disable(struct bgp *bgp) |
7724c0a1 | 4531 | { |
9d303b37 DL |
4532 | hash_iterate(bgp->vnihash, (void (*)(struct hash_backet *, |
4533 | void *))cleanup_vni_on_disable, | |
4534 | bgp); | |
7724c0a1 | 4535 | } |
4536 | ||
14c1a7bf | 4537 | /* |
4538 | * Cleanup EVPN information - invoked at the time of bgpd exit or when the | |
4539 | * BGP instance (default) is being freed. | |
4540 | */ | |
d62a17ae | 4541 | void bgp_evpn_cleanup(struct bgp *bgp) |
14c1a7bf | 4542 | { |
d62a17ae | 4543 | if (bgp->vnihash) |
9d303b37 DL |
4544 | hash_iterate(bgp->vnihash, (void (*)(struct hash_backet *, |
4545 | void *))free_vni_entry, | |
4546 | bgp); | |
d62a17ae | 4547 | if (bgp->import_rt_hash) |
4548 | hash_free(bgp->import_rt_hash); | |
4549 | bgp->import_rt_hash = NULL; | |
10ebe1ab MK |
4550 | if (bgp->vrf_import_rt_hash) |
4551 | hash_free(bgp->vrf_import_rt_hash); | |
4552 | bgp->vrf_import_rt_hash = NULL; | |
d62a17ae | 4553 | if (bgp->vnihash) |
4554 | hash_free(bgp->vnihash); | |
4555 | bgp->vnihash = NULL; | |
c581d8b0 | 4556 | if (bgp->vrf_import_rtl) |
bb7a24ab | 4557 | list_delete_and_null(&bgp->vrf_import_rtl); |
c581d8b0 | 4558 | if (bgp->vrf_export_rtl) |
bb7a24ab | 4559 | list_delete_and_null(&bgp->vrf_export_rtl); |
6a8657d0 | 4560 | if (bgp->l2vnis) |
bb7a24ab | 4561 | list_delete_and_null(&bgp->l2vnis); |
676f83b9 | 4562 | bf_release_index(bm->rd_idspace, bgp->vrf_rd_id); |
14c1a7bf | 4563 | } |
4564 | ||
4565 | /* | |
4566 | * Initialization for EVPN | |
4567 | * Create | |
4568 | * VNI hash table | |
4569 | * hash for RT to VNI | |
676f83b9 | 4570 | * assign a unique rd id for auto derivation of vrf_prd |
14c1a7bf | 4571 | */ |
d62a17ae | 4572 | void bgp_evpn_init(struct bgp *bgp) |
4573 | { | |
4574 | bgp->vnihash = | |
4575 | hash_create(vni_hash_key_make, vni_hash_cmp, "BGP VNI Hash"); | |
4576 | bgp->import_rt_hash = | |
4577 | hash_create(import_rt_hash_key_make, import_rt_hash_cmp, | |
4578 | "BGP Import RT Hash"); | |
10ebe1ab MK |
4579 | bgp->vrf_import_rt_hash = |
4580 | hash_create(vrf_import_rt_hash_key_make, vrf_import_rt_hash_cmp, | |
4581 | "BGP VRF Import RT Hash"); | |
c581d8b0 MK |
4582 | bgp->vrf_import_rtl = list_new(); |
4583 | bgp->vrf_import_rtl->cmp = | |
4584 | (int (*)(void *, void *))evpn_route_target_cmp; | |
4585 | ||
4586 | bgp->vrf_export_rtl = list_new(); | |
4587 | bgp->vrf_export_rtl->cmp = | |
4588 | (int (*)(void *, void *))evpn_route_target_cmp; | |
6a8657d0 | 4589 | bgp->l2vnis = list_new(); |
996c9314 | 4590 | bgp->l2vnis->cmp = (int (*)(void *, void *))vni_hash_cmp; |
676f83b9 | 4591 | bf_assign_index(bm->rd_idspace, bgp->vrf_rd_id); |
14c1a7bf | 4592 | } |
10ebe1ab MK |
4593 | |
4594 | void bgp_evpn_vrf_delete(struct bgp *bgp_vrf) | |
4595 | { | |
4596 | bgp_evpn_unmap_vrf_from_its_rts(bgp_vrf); | |
4597 | } |