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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 | ||
95 | /* | |
96 | * Make import route target hash key. | |
97 | */ | |
d62a17ae | 98 | static unsigned int import_rt_hash_key_make(void *p) |
14c1a7bf | 99 | { |
d62a17ae | 100 | struct irt_node *irt = p; |
101 | char *pnt = irt->rt.val; | |
102 | unsigned int key = 0; | |
103 | int c = 0; | |
14c1a7bf | 104 | |
d62a17ae | 105 | key += pnt[c]; |
106 | key += pnt[c + 1]; | |
107 | key += pnt[c + 2]; | |
108 | key += pnt[c + 3]; | |
109 | key += pnt[c + 4]; | |
110 | key += pnt[c + 5]; | |
111 | key += pnt[c + 6]; | |
112 | key += pnt[c + 7]; | |
14c1a7bf | 113 | |
d62a17ae | 114 | return (key); |
14c1a7bf | 115 | } |
116 | ||
117 | /* | |
118 | * Comparison function for import rt hash | |
119 | */ | |
d62a17ae | 120 | static int import_rt_hash_cmp(const void *p1, const void *p2) |
14c1a7bf | 121 | { |
d62a17ae | 122 | const struct irt_node *irt1 = p1; |
123 | const struct irt_node *irt2 = p2; | |
14c1a7bf | 124 | |
d62a17ae | 125 | if (irt1 == NULL && irt2 == NULL) |
126 | return 1; | |
14c1a7bf | 127 | |
d62a17ae | 128 | if (irt1 == NULL || irt2 == NULL) |
129 | return 0; | |
14c1a7bf | 130 | |
d62a17ae | 131 | return (memcmp(irt1->rt.val, irt2->rt.val, ECOMMUNITY_SIZE) == 0); |
14c1a7bf | 132 | } |
133 | ||
7724c0a1 | 134 | /* |
128ea8ab | 135 | * Create a new import_rt |
136 | */ | |
d62a17ae | 137 | static struct irt_node *import_rt_new(struct bgp *bgp, |
138 | struct ecommunity_val *rt) | |
128ea8ab | 139 | { |
d62a17ae | 140 | struct irt_node *irt; |
128ea8ab | 141 | |
d62a17ae | 142 | if (!bgp) |
143 | return NULL; | |
128ea8ab | 144 | |
d62a17ae | 145 | irt = XCALLOC(MTYPE_BGP_EVPN_IMPORT_RT, sizeof(struct irt_node)); |
146 | if (!irt) | |
147 | return NULL; | |
128ea8ab | 148 | |
d62a17ae | 149 | irt->rt = *rt; |
150 | irt->vnis = list_new(); | |
128ea8ab | 151 | |
d62a17ae | 152 | /* Add to hash */ |
153 | if (!hash_get(bgp->import_rt_hash, irt, hash_alloc_intern)) { | |
154 | XFREE(MTYPE_BGP_EVPN_IMPORT_RT, irt); | |
155 | return NULL; | |
156 | } | |
128ea8ab | 157 | |
d62a17ae | 158 | return irt; |
128ea8ab | 159 | } |
160 | ||
161 | /* | |
162 | * Free the import rt node | |
7724c0a1 | 163 | */ |
d62a17ae | 164 | static void import_rt_free(struct bgp *bgp, struct irt_node *irt) |
7724c0a1 | 165 | { |
d62a17ae | 166 | hash_release(bgp->import_rt_hash, irt); |
167 | XFREE(MTYPE_BGP_EVPN_IMPORT_RT, irt); | |
7724c0a1 | 168 | } |
169 | ||
14c1a7bf | 170 | /* |
128ea8ab | 171 | * Function to lookup Import RT node - used to map a RT to set of |
172 | * VNIs importing routes with that RT. | |
173 | */ | |
d62a17ae | 174 | static struct irt_node *lookup_import_rt(struct bgp *bgp, |
175 | struct ecommunity_val *rt) | |
128ea8ab | 176 | { |
d62a17ae | 177 | struct irt_node *irt; |
178 | struct irt_node tmp; | |
128ea8ab | 179 | |
d62a17ae | 180 | memset(&tmp, 0, sizeof(struct irt_node)); |
181 | memcpy(&tmp.rt, rt, ECOMMUNITY_SIZE); | |
182 | irt = hash_lookup(bgp->import_rt_hash, &tmp); | |
183 | return irt; | |
128ea8ab | 184 | } |
185 | ||
186 | /* | |
187 | * Is specified VNI present on the RT's list of "importing" VNIs? | |
188 | */ | |
d62a17ae | 189 | static int is_vni_present_in_irt_vnis(struct list *vnis, struct bgpevpn *vpn) |
128ea8ab | 190 | { |
d62a17ae | 191 | struct listnode *node, *nnode; |
192 | struct bgpevpn *tmp_vpn; | |
128ea8ab | 193 | |
d62a17ae | 194 | for (ALL_LIST_ELEMENTS(vnis, node, nnode, tmp_vpn)) { |
195 | if (tmp_vpn == vpn) | |
196 | return 1; | |
197 | } | |
128ea8ab | 198 | |
d62a17ae | 199 | return 0; |
128ea8ab | 200 | } |
201 | ||
202 | /* | |
203 | * Compare Route Targets. | |
204 | */ | |
d62a17ae | 205 | static int evpn_route_target_cmp(struct ecommunity *ecom1, |
206 | struct ecommunity *ecom2) | |
128ea8ab | 207 | { |
d62a17ae | 208 | if (ecom1 && !ecom2) |
209 | return -1; | |
128ea8ab | 210 | |
d62a17ae | 211 | if (!ecom1 && ecom2) |
212 | return 1; | |
128ea8ab | 213 | |
d62a17ae | 214 | if (!ecom1 && !ecom2) |
215 | return 0; | |
128ea8ab | 216 | |
d62a17ae | 217 | if (ecom1->str && !ecom2->str) |
218 | return -1; | |
128ea8ab | 219 | |
d62a17ae | 220 | if (!ecom1->str && ecom2->str) |
221 | return 1; | |
128ea8ab | 222 | |
d62a17ae | 223 | if (!ecom1->str && !ecom2->str) |
224 | return 0; | |
128ea8ab | 225 | |
d62a17ae | 226 | return strcmp(ecom1->str, ecom2->str); |
128ea8ab | 227 | } |
228 | ||
229 | /* | |
230 | * Mask off global-admin field of specified extended community (RT), | |
231 | * just retain the local-admin field. | |
232 | */ | |
d62a17ae | 233 | static inline void mask_ecom_global_admin(struct ecommunity_val *dst, |
234 | struct ecommunity_val *src) | |
128ea8ab | 235 | { |
d62a17ae | 236 | u_char type; |
128ea8ab | 237 | |
d62a17ae | 238 | type = src->val[0]; |
239 | dst->val[0] = 0; | |
240 | if (type == ECOMMUNITY_ENCODE_AS) { | |
241 | dst->val[2] = dst->val[3] = 0; | |
242 | } else if (type == ECOMMUNITY_ENCODE_AS4 | |
243 | || type == ECOMMUNITY_ENCODE_IP) { | |
244 | dst->val[2] = dst->val[3] = 0; | |
245 | dst->val[4] = dst->val[5] = 0; | |
246 | } | |
128ea8ab | 247 | } |
248 | ||
249 | /* | |
250 | * Map one RT to specified VNI. | |
14c1a7bf | 251 | */ |
d62a17ae | 252 | static void map_vni_to_rt(struct bgp *bgp, struct bgpevpn *vpn, |
253 | struct ecommunity_val *eval) | |
128ea8ab | 254 | { |
d62a17ae | 255 | struct irt_node *irt; |
256 | struct ecommunity_val eval_tmp; | |
128ea8ab | 257 | |
d62a17ae | 258 | /* If using "automatic" RT, we only care about the local-admin |
259 | * sub-field. | |
260 | * This is to facilitate using VNI as the RT for EBGP peering too. | |
261 | */ | |
262 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
263 | if (!is_import_rt_configured(vpn)) | |
264 | mask_ecom_global_admin(&eval_tmp, eval); | |
128ea8ab | 265 | |
d62a17ae | 266 | irt = lookup_import_rt(bgp, &eval_tmp); |
267 | if (irt && irt->vnis) | |
268 | if (is_vni_present_in_irt_vnis(irt->vnis, vpn)) | |
269 | /* Already mapped. */ | |
270 | return; | |
128ea8ab | 271 | |
d62a17ae | 272 | if (!irt) { |
273 | irt = import_rt_new(bgp, &eval_tmp); | |
274 | assert(irt); | |
275 | } | |
128ea8ab | 276 | |
d62a17ae | 277 | /* Add VNI to the hash list for this RT. */ |
278 | listnode_add(irt->vnis, vpn); | |
128ea8ab | 279 | } |
280 | ||
281 | /* | |
282 | * Unmap specified VNI from specified RT. If there are no other | |
283 | * VNIs for this RT, then the RT hash is deleted. | |
284 | */ | |
d62a17ae | 285 | static void unmap_vni_from_rt(struct bgp *bgp, struct bgpevpn *vpn, |
286 | struct irt_node *irt) | |
14c1a7bf | 287 | { |
d62a17ae | 288 | /* Delete VNI from hash list for this RT. */ |
289 | listnode_delete(irt->vnis, vpn); | |
290 | if (!listnode_head(irt->vnis)) { | |
291 | list_free(irt->vnis); | |
292 | import_rt_free(bgp, irt); | |
293 | } | |
14c1a7bf | 294 | } |
295 | ||
128ea8ab | 296 | /* |
297 | * Create RT extended community automatically from passed information: | |
298 | * of the form AS:VNI. | |
299 | * NOTE: We use only the lower 16 bits of the AS. This is sufficient as | |
300 | * the need is to get a RT value that will be unique across different | |
301 | * VNIs but the same across routers (in the same AS) for a particular | |
302 | * VNI. | |
303 | */ | |
d62a17ae | 304 | static void form_auto_rt(struct bgp *bgp, struct bgpevpn *vpn, struct list *rtl) |
128ea8ab | 305 | { |
d62a17ae | 306 | struct ecommunity_val eval; |
307 | struct ecommunity *ecomadd; | |
128ea8ab | 308 | |
d62a17ae | 309 | encode_route_target_as((bgp->as & 0xFFFF), vpn->vni, &eval); |
128ea8ab | 310 | |
d62a17ae | 311 | ecomadd = ecommunity_new(); |
312 | ecommunity_add_val(ecomadd, &eval); | |
313 | listnode_add_sort(rtl, ecomadd); | |
128ea8ab | 314 | } |
14c1a7bf | 315 | |
316 | /* | |
128ea8ab | 317 | * Derive RD and RT for a VNI automatically. Invoked at the time of |
318 | * creation of a VNI. | |
319 | */ | |
d62a17ae | 320 | static void derive_rd_rt_for_vni(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 321 | { |
d62a17ae | 322 | bgp_evpn_derive_auto_rd(bgp, vpn); |
323 | bgp_evpn_derive_auto_rt_import(bgp, vpn); | |
324 | bgp_evpn_derive_auto_rt_export(bgp, vpn); | |
128ea8ab | 325 | } |
326 | ||
327 | /* | |
328 | * Add (update) or delete MACIP from zebra. | |
14c1a7bf | 329 | */ |
d62a17ae | 330 | static int bgp_zebra_send_remote_macip(struct bgp *bgp, struct bgpevpn *vpn, |
331 | struct prefix_evpn *p, | |
332 | struct in_addr remote_vtep_ip, int add, | |
333 | u_char sticky) | |
334 | { | |
335 | struct stream *s; | |
336 | int ipa_len; | |
337 | char buf1[ETHER_ADDR_STRLEN]; | |
338 | char buf2[INET6_ADDRSTRLEN]; | |
339 | char buf3[INET6_ADDRSTRLEN]; | |
340 | ||
341 | /* Check socket. */ | |
342 | if (!zclient || zclient->sock < 0) | |
343 | return 0; | |
344 | ||
345 | /* Don't try to register if Zebra doesn't know of this instance. */ | |
346 | if (!IS_BGP_INST_KNOWN_TO_ZEBRA(bgp)) | |
347 | return 0; | |
348 | ||
349 | s = zclient->obuf; | |
350 | stream_reset(s); | |
351 | ||
421bb26a MK |
352 | zclient_create_header(s, add ? ZEBRA_REMOTE_MACIP_ADD |
353 | : ZEBRA_REMOTE_MACIP_DEL, | |
354 | bgp->vrf_id); | |
d62a17ae | 355 | stream_putl(s, vpn->vni); |
28328ea9 | 356 | stream_put(s, &p->prefix.mac.octet, ETH_ALEN); /* Mac Addr */ |
d62a17ae | 357 | /* IP address length and IP address, if any. */ |
358 | if (IS_EVPN_PREFIX_IPADDR_NONE(p)) | |
359 | stream_putl(s, 0); | |
360 | else { | |
361 | ipa_len = IS_EVPN_PREFIX_IPADDR_V4(p) ? IPV4_MAX_BYTELEN | |
362 | : IPV6_MAX_BYTELEN; | |
363 | stream_putl(s, ipa_len); | |
364 | stream_put(s, &p->prefix.ip.ip.addr, ipa_len); | |
365 | } | |
366 | stream_put_in_addr(s, &remote_vtep_ip); | |
367 | ||
368 | /* TX MAC sticky status */ | |
369 | if (add) | |
370 | stream_putc(s, sticky); | |
371 | ||
372 | stream_putw_at(s, 0, stream_get_endp(s)); | |
373 | ||
374 | if (bgp_debug_zebra(NULL)) | |
375 | zlog_debug("Tx %s MACIP, VNI %u %sMAC %s IP %s remote VTEP %s", | |
376 | add ? "ADD" : "DEL", vpn->vni, | |
377 | sticky ? "sticky " : "", | |
378 | prefix_mac2str(&p->prefix.mac, buf1, sizeof(buf1)), | |
379 | ipaddr2str(&p->prefix.ip, buf3, sizeof(buf3)), | |
380 | inet_ntop(AF_INET, &remote_vtep_ip, buf2, | |
381 | sizeof(buf2))); | |
382 | ||
383 | return zclient_send_message(zclient); | |
7ef5a232 | 384 | } |
b18825eb | 385 | |
128ea8ab | 386 | /* |
387 | * Add (update) or delete remote VTEP from zebra. | |
388 | */ | |
d62a17ae | 389 | static int bgp_zebra_send_remote_vtep(struct bgp *bgp, struct bgpevpn *vpn, |
390 | struct prefix_evpn *p, int add) | |
128ea8ab | 391 | { |
d62a17ae | 392 | struct stream *s; |
128ea8ab | 393 | |
d62a17ae | 394 | /* Check socket. */ |
395 | if (!zclient || zclient->sock < 0) | |
396 | return 0; | |
128ea8ab | 397 | |
d62a17ae | 398 | /* Don't try to register if Zebra doesn't know of this instance. */ |
399 | if (!IS_BGP_INST_KNOWN_TO_ZEBRA(bgp)) | |
400 | return 0; | |
128ea8ab | 401 | |
d62a17ae | 402 | s = zclient->obuf; |
403 | stream_reset(s); | |
128ea8ab | 404 | |
421bb26a MK |
405 | zclient_create_header(s, add ? ZEBRA_REMOTE_VTEP_ADD |
406 | : ZEBRA_REMOTE_VTEP_DEL, | |
407 | bgp->vrf_id); | |
d62a17ae | 408 | stream_putl(s, vpn->vni); |
409 | if (IS_EVPN_PREFIX_IPADDR_V4(p)) | |
410 | stream_put_in_addr(s, &p->prefix.ip.ipaddr_v4); | |
411 | else if (IS_EVPN_PREFIX_IPADDR_V6(p)) { | |
412 | zlog_err( | |
413 | "Bad remote IP when trying to %s remote VTEP for VNI %u", | |
414 | add ? "ADD" : "DEL", vpn->vni); | |
415 | return -1; | |
416 | } | |
128ea8ab | 417 | |
d62a17ae | 418 | stream_putw_at(s, 0, stream_get_endp(s)); |
128ea8ab | 419 | |
d62a17ae | 420 | if (bgp_debug_zebra(NULL)) |
421 | zlog_debug("Tx %s Remote VTEP, VNI %u remote VTEP %s", | |
422 | add ? "ADD" : "DEL", vpn->vni, | |
423 | inet_ntoa(p->prefix.ip.ipaddr_v4)); | |
128ea8ab | 424 | |
d62a17ae | 425 | return zclient_send_message(zclient); |
128ea8ab | 426 | } |
427 | ||
428 | /* | |
429 | * Build extended communities for EVPN route. RT and ENCAP are | |
430 | * applicable to all routes. | |
431 | */ | |
d62a17ae | 432 | static void build_evpn_route_extcomm(struct bgpevpn *vpn, struct attr *attr) |
128ea8ab | 433 | { |
d62a17ae | 434 | struct ecommunity ecom_encap; |
435 | struct ecommunity ecom_sticky; | |
436 | struct ecommunity_val eval; | |
437 | struct ecommunity_val eval_sticky; | |
438 | bgp_encap_types tnl_type; | |
439 | struct listnode *node, *nnode; | |
440 | struct ecommunity *ecom; | |
441 | u_int32_t seqnum; | |
128ea8ab | 442 | |
d62a17ae | 443 | /* Encap */ |
444 | tnl_type = BGP_ENCAP_TYPE_VXLAN; | |
445 | memset(&ecom_encap, 0, sizeof(ecom_encap)); | |
446 | encode_encap_extcomm(tnl_type, &eval); | |
447 | ecom_encap.size = 1; | |
448 | ecom_encap.val = (u_int8_t *)eval.val; | |
128ea8ab | 449 | |
d62a17ae | 450 | /* Add Encap */ |
451 | attr->ecommunity = ecommunity_dup(&ecom_encap); | |
128ea8ab | 452 | |
d62a17ae | 453 | /* Add the export RTs */ |
454 | for (ALL_LIST_ELEMENTS(vpn->export_rtl, node, nnode, ecom)) | |
455 | attr->ecommunity = ecommunity_merge(attr->ecommunity, ecom); | |
128ea8ab | 456 | |
d62a17ae | 457 | if (attr->sticky) { |
458 | seqnum = 0; | |
459 | memset(&ecom_sticky, 0, sizeof(ecom_sticky)); | |
460 | encode_mac_mobility_extcomm(1, seqnum, &eval_sticky); | |
461 | ecom_sticky.size = 1; | |
462 | ecom_sticky.val = (u_int8_t *)eval_sticky.val; | |
463 | attr->ecommunity = | |
464 | ecommunity_merge(attr->ecommunity, &ecom_sticky); | |
465 | } | |
c85c03c7 | 466 | |
d62a17ae | 467 | attr->flag |= ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES); |
128ea8ab | 468 | } |
469 | ||
470 | /* | |
471 | * Add MAC mobility extended community to attribute. | |
472 | */ | |
d62a17ae | 473 | static void add_mac_mobility_to_attr(u_int32_t seq_num, struct attr *attr) |
474 | { | |
475 | struct ecommunity ecom_tmp; | |
476 | struct ecommunity_val eval; | |
421bb26a | 477 | u_int8_t *ecom_val_ptr; |
d62a17ae | 478 | int i; |
479 | u_int8_t *pnt; | |
480 | int type = 0; | |
481 | int sub_type = 0; | |
482 | ||
483 | /* Build MM */ | |
484 | encode_mac_mobility_extcomm(0, seq_num, &eval); | |
485 | ||
486 | /* Find current MM ecommunity */ | |
421bb26a | 487 | ecom_val_ptr = NULL; |
d62a17ae | 488 | |
489 | if (attr->ecommunity) { | |
490 | for (i = 0; i < attr->ecommunity->size; i++) { | |
491 | pnt = attr->ecommunity->val + (i * 8); | |
492 | type = *pnt++; | |
493 | sub_type = *pnt++; | |
494 | ||
495 | if (type == ECOMMUNITY_ENCODE_EVPN | |
496 | && sub_type | |
497 | == ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY) { | |
421bb26a MK |
498 | ecom_val_ptr = |
499 | (u_int8_t *)(attr->ecommunity->val | |
500 | + (i * 8)); | |
d62a17ae | 501 | break; |
502 | } | |
503 | } | |
504 | } | |
505 | ||
506 | /* Update the existing MM ecommunity */ | |
421bb26a MK |
507 | if (ecom_val_ptr) { |
508 | memcpy(ecom_val_ptr, eval.val, sizeof(char) * ECOMMUNITY_SIZE); | |
d62a17ae | 509 | } |
510 | /* Add MM to existing */ | |
511 | else { | |
512 | memset(&ecom_tmp, 0, sizeof(ecom_tmp)); | |
513 | ecom_tmp.size = 1; | |
514 | ecom_tmp.val = (u_int8_t *)eval.val; | |
515 | ||
516 | attr->ecommunity = | |
517 | ecommunity_merge(attr->ecommunity, &ecom_tmp); | |
518 | } | |
128ea8ab | 519 | } |
520 | ||
521 | /* Install EVPN route into zebra. */ | |
d62a17ae | 522 | static int evpn_zebra_install(struct bgp *bgp, struct bgpevpn *vpn, |
523 | struct prefix_evpn *p, | |
524 | struct in_addr remote_vtep_ip, u_char sticky) | |
128ea8ab | 525 | { |
d62a17ae | 526 | int ret; |
128ea8ab | 527 | |
d62a17ae | 528 | if (p->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) |
529 | ret = bgp_zebra_send_remote_macip(bgp, vpn, p, remote_vtep_ip, | |
530 | 1, sticky); | |
531 | else | |
532 | ret = bgp_zebra_send_remote_vtep(bgp, vpn, p, 1); | |
128ea8ab | 533 | |
d62a17ae | 534 | return ret; |
128ea8ab | 535 | } |
536 | ||
537 | /* Uninstall EVPN route from zebra. */ | |
d62a17ae | 538 | static int evpn_zebra_uninstall(struct bgp *bgp, struct bgpevpn *vpn, |
539 | struct prefix_evpn *p, | |
540 | struct in_addr remote_vtep_ip) | |
128ea8ab | 541 | { |
d62a17ae | 542 | int ret; |
128ea8ab | 543 | |
d62a17ae | 544 | if (p->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) |
545 | ret = bgp_zebra_send_remote_macip(bgp, vpn, p, remote_vtep_ip, | |
546 | 0, 0); | |
547 | else | |
548 | ret = bgp_zebra_send_remote_vtep(bgp, vpn, p, 0); | |
128ea8ab | 549 | |
d62a17ae | 550 | return ret; |
128ea8ab | 551 | } |
552 | ||
553 | /* | |
554 | * Due to MAC mobility, the prior "local" best route has been supplanted | |
555 | * by a "remote" best route. The prior route has to be deleted and withdrawn | |
556 | * from peers. | |
557 | */ | |
d62a17ae | 558 | static void evpn_delete_old_local_route(struct bgp *bgp, struct bgpevpn *vpn, |
559 | struct bgp_node *rn, | |
560 | struct bgp_info *old_local) | |
128ea8ab | 561 | { |
d62a17ae | 562 | struct bgp_node *global_rn; |
563 | struct bgp_info *ri; | |
564 | afi_t afi = AFI_L2VPN; | |
565 | safi_t safi = SAFI_EVPN; | |
128ea8ab | 566 | |
d62a17ae | 567 | /* Locate route node in the global EVPN routing table. Note that |
568 | * this table is a 2-level tree (RD-level + Prefix-level) similar to | |
569 | * L3VPN routes. | |
570 | */ | |
571 | global_rn = bgp_afi_node_lookup(bgp->rib[afi][safi], afi, safi, | |
572 | (struct prefix *)&rn->p, &vpn->prd); | |
573 | if (global_rn) { | |
574 | /* Delete route entry in the global EVPN table. */ | |
575 | delete_evpn_route_entry(bgp, vpn, afi, safi, global_rn, &ri); | |
128ea8ab | 576 | |
d62a17ae | 577 | /* Schedule for processing - withdraws to peers happen from |
578 | * this table. | |
579 | */ | |
580 | if (ri) | |
581 | bgp_process(bgp, global_rn, afi, safi); | |
582 | bgp_unlock_node(global_rn); | |
583 | } | |
128ea8ab | 584 | |
d62a17ae | 585 | /* Delete route entry in the VNI route table, caller to remove. */ |
586 | bgp_info_delete(rn, old_local); | |
128ea8ab | 587 | } |
588 | ||
589 | /* | |
590 | * Calculate the best path for an EVPN route. Install/update best path in zebra, | |
591 | * if appropriate. | |
592 | */ | |
d62a17ae | 593 | static int evpn_route_select_install(struct bgp *bgp, struct bgpevpn *vpn, |
594 | struct bgp_node *rn) | |
595 | { | |
596 | struct bgp_info *old_select, *new_select; | |
597 | struct bgp_info_pair old_and_new; | |
598 | afi_t afi = AFI_L2VPN; | |
599 | safi_t safi = SAFI_EVPN; | |
600 | int ret = 0; | |
601 | ||
602 | /* Compute the best path. */ | |
603 | bgp_best_selection(bgp, rn, &bgp->maxpaths[afi][safi], &old_and_new, | |
604 | afi, safi); | |
605 | old_select = old_and_new.old; | |
606 | new_select = old_and_new.new; | |
607 | ||
608 | /* If the best path hasn't changed - see if there is still something to | |
609 | * update | |
610 | * to zebra RIB. | |
611 | */ | |
612 | if (old_select && old_select == new_select | |
613 | && old_select->type == ZEBRA_ROUTE_BGP | |
614 | && old_select->sub_type == BGP_ROUTE_NORMAL | |
615 | && !CHECK_FLAG(rn->flags, BGP_NODE_USER_CLEAR) | |
616 | && !CHECK_FLAG(old_select->flags, BGP_INFO_ATTR_CHANGED) | |
617 | && !bgp->addpath_tx_used[afi][safi]) { | |
618 | if (bgp_zebra_has_route_changed(rn, old_select)) | |
619 | ret = evpn_zebra_install(bgp, vpn, | |
620 | (struct prefix_evpn *)&rn->p, | |
621 | old_select->attr->nexthop, | |
622 | old_select->attr->sticky); | |
623 | UNSET_FLAG(old_select->flags, BGP_INFO_MULTIPATH_CHG); | |
624 | bgp_zebra_clear_route_change_flags(rn); | |
625 | return ret; | |
626 | } | |
627 | ||
628 | /* If the user did a "clear" this flag will be set */ | |
629 | UNSET_FLAG(rn->flags, BGP_NODE_USER_CLEAR); | |
630 | ||
631 | /* bestpath has changed; update relevant fields and install or uninstall | |
632 | * into the zebra RIB. | |
633 | */ | |
634 | if (old_select || new_select) | |
635 | bgp_bump_version(rn); | |
636 | ||
637 | if (old_select) | |
638 | bgp_info_unset_flag(rn, old_select, BGP_INFO_SELECTED); | |
639 | if (new_select) { | |
640 | bgp_info_set_flag(rn, new_select, BGP_INFO_SELECTED); | |
641 | bgp_info_unset_flag(rn, new_select, BGP_INFO_ATTR_CHANGED); | |
642 | UNSET_FLAG(new_select->flags, BGP_INFO_MULTIPATH_CHG); | |
643 | } | |
644 | ||
645 | if (new_select && new_select->type == ZEBRA_ROUTE_BGP | |
646 | && new_select->sub_type == BGP_ROUTE_NORMAL) { | |
647 | ret = evpn_zebra_install(bgp, vpn, (struct prefix_evpn *)&rn->p, | |
648 | new_select->attr->nexthop, | |
649 | new_select->attr->sticky); | |
650 | /* If an old best existed and it was a "local" route, the only | |
651 | * reason | |
652 | * it would be supplanted is due to MAC mobility procedures. So, | |
653 | * we | |
654 | * need to do an implicit delete and withdraw that route from | |
655 | * peers. | |
656 | */ | |
657 | if (old_select && old_select->peer == bgp->peer_self | |
658 | && old_select->type == ZEBRA_ROUTE_BGP | |
659 | && old_select->sub_type == BGP_ROUTE_STATIC) | |
660 | evpn_delete_old_local_route(bgp, vpn, rn, old_select); | |
661 | } else { | |
662 | if (old_select && old_select->type == ZEBRA_ROUTE_BGP | |
663 | && old_select->sub_type == BGP_ROUTE_NORMAL) | |
664 | ret = evpn_zebra_uninstall(bgp, vpn, | |
665 | (struct prefix_evpn *)&rn->p, | |
666 | old_select->attr->nexthop); | |
667 | } | |
668 | ||
669 | /* Clear any route change flags. */ | |
670 | bgp_zebra_clear_route_change_flags(rn); | |
671 | ||
672 | /* Reap old select bgp_info, if it has been removed */ | |
673 | if (old_select && CHECK_FLAG(old_select->flags, BGP_INFO_REMOVED)) | |
674 | bgp_info_reap(rn, old_select); | |
675 | ||
676 | return ret; | |
128ea8ab | 677 | } |
678 | ||
c85c03c7 | 679 | |
680 | /* | |
681 | * Return true if the local ri for this rn has sticky set | |
682 | */ | |
d62a17ae | 683 | static int evpn_route_is_sticky(struct bgp *bgp, struct bgp_node *rn) |
c85c03c7 | 684 | { |
d62a17ae | 685 | struct bgp_info *tmp_ri; |
686 | struct bgp_info *local_ri; | |
c85c03c7 | 687 | |
d62a17ae | 688 | local_ri = NULL; |
689 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) { | |
690 | if (tmp_ri->peer == bgp->peer_self | |
691 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
692 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
693 | local_ri = tmp_ri; | |
694 | } | |
c85c03c7 | 695 | |
d62a17ae | 696 | if (!local_ri) |
697 | return 0; | |
c85c03c7 | 698 | |
d62a17ae | 699 | return local_ri->attr->sticky; |
c85c03c7 | 700 | } |
701 | ||
128ea8ab | 702 | /* |
703 | * Create or update EVPN route entry. This could be in the VNI route table | |
704 | * or the global route table. | |
705 | */ | |
d62a17ae | 706 | static int update_evpn_route_entry(struct bgp *bgp, struct bgpevpn *vpn, |
707 | afi_t afi, safi_t safi, struct bgp_node *rn, | |
708 | struct attr *attr, int add, int vni_table, | |
1a98c087 | 709 | struct bgp_info **ri, u_char flags) |
d62a17ae | 710 | { |
711 | struct bgp_info *tmp_ri; | |
712 | struct bgp_info *local_ri, *remote_ri; | |
713 | struct attr *attr_new; | |
714 | mpls_label_t label = MPLS_INVALID_LABEL; | |
715 | int route_change = 1; | |
716 | u_char sticky = 0; | |
717 | ||
718 | *ri = NULL; | |
719 | ||
720 | /* See if this is an update of an existing route, or a new add. Also, | |
721 | * identify if already known from remote, and if so, the one with the | |
722 | * highest sequence number; this is only when adding to the VNI routing | |
723 | * table. | |
724 | */ | |
725 | local_ri = remote_ri = NULL; | |
726 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) { | |
727 | if (tmp_ri->peer == bgp->peer_self | |
728 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
729 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
730 | local_ri = tmp_ri; | |
731 | if (vni_table) { | |
732 | if (tmp_ri->type == ZEBRA_ROUTE_BGP | |
733 | && tmp_ri->sub_type == BGP_ROUTE_NORMAL | |
734 | && CHECK_FLAG(tmp_ri->flags, BGP_INFO_VALID)) { | |
735 | if (!remote_ri) | |
736 | remote_ri = tmp_ri; | |
737 | else if (mac_mobility_seqnum(tmp_ri->attr) | |
738 | > mac_mobility_seqnum(remote_ri->attr)) | |
739 | remote_ri = tmp_ri; | |
740 | } | |
741 | } | |
742 | } | |
743 | ||
744 | /* If route doesn't exist already, create a new one, if told to. | |
745 | * Otherwise act based on whether the attributes of the route have | |
746 | * changed or not. | |
747 | */ | |
748 | if (!local_ri && !add) | |
749 | return 0; | |
750 | ||
751 | if (!local_ri) { | |
752 | /* When learnt locally for the first time but already known from | |
753 | * remote, we have to initiate appropriate MAC mobility steps. | |
754 | * This | |
755 | * is applicable when updating the VNI routing table. | |
1a98c087 MK |
756 | * We need to skip mobility steps for g/w macs (local mac on g/w |
757 | * SVI) advertised in EVPN. | |
758 | * This will ensure that local routes are preferred for g/w macs | |
d62a17ae | 759 | */ |
1a98c087 | 760 | if (remote_ri && !CHECK_FLAG(flags, ZEBRA_MAC_TYPE_GW)) { |
d62a17ae | 761 | u_int32_t cur_seqnum; |
762 | ||
763 | /* Add MM extended community to route. */ | |
764 | cur_seqnum = mac_mobility_seqnum(remote_ri->attr); | |
765 | add_mac_mobility_to_attr(cur_seqnum + 1, attr); | |
766 | } | |
767 | ||
768 | /* Add (or update) attribute to hash. */ | |
769 | attr_new = bgp_attr_intern(attr); | |
770 | ||
771 | /* Extract MAC mobility sequence number, if any. */ | |
772 | attr_new->mm_seqnum = | |
773 | bgp_attr_mac_mobility_seqnum(attr_new, &sticky); | |
774 | attr_new->sticky = sticky; | |
775 | ||
776 | /* Create new route with its attribute. */ | |
777 | tmp_ri = info_make(ZEBRA_ROUTE_BGP, BGP_ROUTE_STATIC, 0, | |
778 | bgp->peer_self, attr_new, rn); | |
779 | SET_FLAG(tmp_ri->flags, BGP_INFO_VALID); | |
780 | bgp_info_extra_get(tmp_ri); | |
781 | ||
782 | /* The VNI goes into the 'label' field of the route */ | |
783 | vni2label(vpn->vni, &label); | |
784 | ||
785 | memcpy(&tmp_ri->extra->label, &label, BGP_LABEL_BYTES); | |
786 | bgp_info_add(rn, tmp_ri); | |
787 | } else { | |
788 | tmp_ri = local_ri; | |
789 | if (attrhash_cmp(tmp_ri->attr, attr) | |
790 | && !CHECK_FLAG(tmp_ri->flags, BGP_INFO_REMOVED)) | |
791 | route_change = 0; | |
792 | else { | |
793 | /* The attribute has changed. */ | |
794 | /* Add (or update) attribute to hash. */ | |
795 | attr_new = bgp_attr_intern(attr); | |
796 | bgp_info_set_flag(rn, tmp_ri, BGP_INFO_ATTR_CHANGED); | |
797 | ||
798 | /* Restore route, if needed. */ | |
799 | if (CHECK_FLAG(tmp_ri->flags, BGP_INFO_REMOVED)) | |
800 | bgp_info_restore(rn, tmp_ri); | |
801 | ||
802 | /* Unintern existing, set to new. */ | |
803 | bgp_attr_unintern(&tmp_ri->attr); | |
804 | tmp_ri->attr = attr_new; | |
805 | tmp_ri->uptime = bgp_clock(); | |
806 | } | |
807 | } | |
808 | ||
809 | /* Return back the route entry. */ | |
810 | *ri = tmp_ri; | |
811 | return route_change; | |
128ea8ab | 812 | } |
813 | ||
814 | /* | |
815 | * Create or update EVPN route (of type based on prefix) for specified VNI | |
816 | * and schedule for processing. | |
817 | */ | |
d62a17ae | 818 | static int update_evpn_route(struct bgp *bgp, struct bgpevpn *vpn, |
1a98c087 | 819 | struct prefix_evpn *p, u_char flags) |
128ea8ab | 820 | { |
d62a17ae | 821 | struct bgp_node *rn; |
822 | struct attr attr; | |
823 | struct attr *attr_new; | |
824 | struct bgp_info *ri; | |
825 | afi_t afi = AFI_L2VPN; | |
826 | safi_t safi = SAFI_EVPN; | |
827 | int route_change; | |
128ea8ab | 828 | |
d62a17ae | 829 | memset(&attr, 0, sizeof(struct attr)); |
128ea8ab | 830 | |
d62a17ae | 831 | /* Build path-attribute for this route. */ |
832 | bgp_attr_default_set(&attr, BGP_ORIGIN_IGP); | |
833 | attr.nexthop = vpn->originator_ip; | |
834 | attr.mp_nexthop_global_in = vpn->originator_ip; | |
835 | attr.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
1a98c087 | 836 | attr.sticky = CHECK_FLAG(flags, ZEBRA_MAC_TYPE_STICKY) ? 1 : 0; |
128ea8ab | 837 | |
d62a17ae | 838 | /* Set up RT and ENCAP extended community. */ |
839 | build_evpn_route_extcomm(vpn, &attr); | |
128ea8ab | 840 | |
d62a17ae | 841 | /* First, create (or fetch) route node within the VNI. */ |
842 | /* NOTE: There is no RD here. */ | |
843 | rn = bgp_node_get(vpn->route_table, (struct prefix *)p); | |
128ea8ab | 844 | |
d62a17ae | 845 | /* Create or update route entry. */ |
846 | route_change = update_evpn_route_entry(bgp, vpn, afi, safi, rn, &attr, | |
1a98c087 | 847 | 1, 1, &ri, flags); |
d62a17ae | 848 | assert(ri); |
849 | attr_new = ri->attr; | |
128ea8ab | 850 | |
d62a17ae | 851 | /* Perform route selection; this is just to set the flags correctly |
852 | * as local route in the VNI always wins. | |
853 | */ | |
854 | evpn_route_select_install(bgp, vpn, rn); | |
855 | bgp_unlock_node(rn); | |
128ea8ab | 856 | |
d62a17ae | 857 | /* If this is a new route or some attribute has changed, export the |
858 | * route to the global table. The route will be advertised to peers | |
859 | * from there. Note that this table is a 2-level tree (RD-level + | |
860 | * Prefix-level) similar to L3VPN routes. | |
861 | */ | |
862 | if (route_change) { | |
863 | struct bgp_info *global_ri; | |
128ea8ab | 864 | |
d62a17ae | 865 | rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, |
866 | (struct prefix *)p, &vpn->prd); | |
867 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, attr_new, 1, 0, | |
1a98c087 | 868 | &global_ri, flags); |
128ea8ab | 869 | |
d62a17ae | 870 | /* Schedule for processing and unlock node. */ |
871 | bgp_process(bgp, rn, afi, safi); | |
872 | bgp_unlock_node(rn); | |
873 | } | |
128ea8ab | 874 | |
d62a17ae | 875 | /* Unintern temporary. */ |
876 | aspath_unintern(&attr.aspath); | |
128ea8ab | 877 | |
d62a17ae | 878 | return 0; |
128ea8ab | 879 | } |
880 | ||
881 | /* | |
882 | * Delete EVPN route entry. This could be in the VNI route table | |
883 | * or the global route table. | |
884 | */ | |
d62a17ae | 885 | static void delete_evpn_route_entry(struct bgp *bgp, struct bgpevpn *vpn, |
886 | afi_t afi, safi_t safi, struct bgp_node *rn, | |
887 | struct bgp_info **ri) | |
128ea8ab | 888 | { |
d62a17ae | 889 | struct bgp_info *tmp_ri; |
128ea8ab | 890 | |
d62a17ae | 891 | *ri = NULL; |
128ea8ab | 892 | |
d62a17ae | 893 | /* Now, find matching route. */ |
894 | for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) | |
895 | if (tmp_ri->peer == bgp->peer_self | |
896 | && tmp_ri->type == ZEBRA_ROUTE_BGP | |
897 | && tmp_ri->sub_type == BGP_ROUTE_STATIC) | |
898 | break; | |
128ea8ab | 899 | |
d62a17ae | 900 | *ri = tmp_ri; |
128ea8ab | 901 | |
d62a17ae | 902 | /* Mark route for delete. */ |
903 | if (tmp_ri) | |
904 | bgp_info_delete(rn, tmp_ri); | |
128ea8ab | 905 | } |
906 | ||
907 | /* | |
908 | * Delete EVPN route (of type based on prefix) for specified VNI and | |
909 | * schedule for processing. | |
910 | */ | |
d62a17ae | 911 | static int delete_evpn_route(struct bgp *bgp, struct bgpevpn *vpn, |
912 | struct prefix_evpn *p) | |
913 | { | |
914 | struct bgp_node *rn, *global_rn; | |
915 | struct bgp_info *ri; | |
916 | afi_t afi = AFI_L2VPN; | |
917 | safi_t safi = SAFI_EVPN; | |
918 | ||
919 | /* First, locate the route node within the VNI. If it doesn't exist, | |
920 | * there | |
921 | * is nothing further to do. | |
922 | */ | |
923 | /* NOTE: There is no RD here. */ | |
924 | rn = bgp_node_lookup(vpn->route_table, (struct prefix *)p); | |
925 | if (!rn) | |
926 | return 0; | |
927 | ||
928 | /* Next, locate route node in the global EVPN routing table. Note that | |
929 | * this table is a 2-level tree (RD-level + Prefix-level) similar to | |
930 | * L3VPN routes. | |
931 | */ | |
932 | global_rn = bgp_afi_node_lookup(bgp->rib[afi][safi], afi, safi, | |
933 | (struct prefix *)p, &vpn->prd); | |
934 | if (global_rn) { | |
935 | /* Delete route entry in the global EVPN table. */ | |
936 | delete_evpn_route_entry(bgp, vpn, afi, safi, global_rn, &ri); | |
937 | ||
938 | /* Schedule for processing - withdraws to peers happen from | |
939 | * this table. | |
940 | */ | |
941 | if (ri) | |
942 | bgp_process(bgp, global_rn, afi, safi); | |
943 | bgp_unlock_node(global_rn); | |
944 | } | |
945 | ||
946 | /* Delete route entry in the VNI route table. This can just be removed. | |
947 | */ | |
948 | delete_evpn_route_entry(bgp, vpn, afi, safi, rn, &ri); | |
949 | if (ri) | |
950 | bgp_info_reap(rn, ri); | |
951 | bgp_unlock_node(rn); | |
952 | ||
953 | return 0; | |
128ea8ab | 954 | } |
955 | ||
956 | /* | |
957 | * Update all type-2 (MACIP) local routes for this VNI - these should also | |
958 | * be scheduled for advertise to peers. | |
959 | */ | |
d62a17ae | 960 | static int update_all_type2_routes(struct bgp *bgp, struct bgpevpn *vpn) |
961 | { | |
962 | afi_t afi; | |
963 | safi_t safi; | |
964 | struct bgp_node *rn; | |
965 | struct bgp_info *ri; | |
966 | struct attr attr; | |
967 | struct attr attr_sticky; | |
968 | struct attr *attr_new; | |
969 | ||
970 | afi = AFI_L2VPN; | |
971 | safi = SAFI_EVPN; | |
972 | memset(&attr, 0, sizeof(struct attr)); | |
973 | memset(&attr_sticky, 0, sizeof(struct attr)); | |
974 | ||
975 | /* Build path-attribute - all type-2 routes for this VNI will share the | |
976 | * same path attribute. | |
977 | */ | |
978 | bgp_attr_default_set(&attr, BGP_ORIGIN_IGP); | |
979 | bgp_attr_default_set(&attr_sticky, BGP_ORIGIN_IGP); | |
980 | attr.nexthop = vpn->originator_ip; | |
981 | attr.mp_nexthop_global_in = vpn->originator_ip; | |
982 | attr.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
983 | attr_sticky.nexthop = vpn->originator_ip; | |
984 | attr_sticky.mp_nexthop_global_in = vpn->originator_ip; | |
985 | attr_sticky.mp_nexthop_len = BGP_ATTR_NHLEN_IPV4; | |
986 | attr_sticky.sticky = 1; | |
987 | ||
988 | /* Set up RT, ENCAP and sticky MAC extended community. */ | |
989 | build_evpn_route_extcomm(vpn, &attr); | |
990 | build_evpn_route_extcomm(vpn, &attr_sticky); | |
991 | ||
992 | /* Walk this VNI's route table and update local type-2 routes. For any | |
993 | * routes updated, update corresponding entry in the global table too. | |
994 | */ | |
995 | for (rn = bgp_table_top(vpn->route_table); rn; | |
996 | rn = bgp_route_next(rn)) { | |
997 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
998 | struct bgp_node *rd_rn; | |
999 | struct bgp_info *global_ri; | |
1000 | ||
1001 | if (evp->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE) | |
1002 | continue; | |
1003 | ||
1004 | if (evpn_route_is_sticky(bgp, rn)) | |
1005 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, | |
1a98c087 | 1006 | &attr_sticky, 0, 1, &ri, 0); |
d62a17ae | 1007 | else |
1008 | update_evpn_route_entry(bgp, vpn, afi, safi, rn, &attr, | |
1a98c087 | 1009 | 0, 1, &ri, 0); |
d62a17ae | 1010 | |
1011 | /* If a local route exists for this prefix, we need to update | |
1012 | * the global routing table too. | |
1013 | */ | |
1014 | if (!ri) | |
1015 | continue; | |
1016 | ||
1017 | /* Perform route selection; this is just to set the flags | |
1018 | * correctly | |
1019 | * as local route in the VNI always wins. | |
1020 | */ | |
1021 | evpn_route_select_install(bgp, vpn, rn); | |
1022 | ||
1023 | attr_new = ri->attr; | |
1024 | ||
1025 | /* Update route in global routing table. */ | |
1026 | rd_rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, | |
1027 | (struct prefix *)evp, &vpn->prd); | |
1028 | assert(rd_rn); | |
1029 | update_evpn_route_entry(bgp, vpn, afi, safi, rd_rn, attr_new, 0, | |
1a98c087 | 1030 | 0, &global_ri, 0); |
d62a17ae | 1031 | |
1032 | /* Schedule for processing and unlock node. */ | |
1033 | bgp_process(bgp, rd_rn, afi, safi); | |
1034 | bgp_unlock_node(rd_rn); | |
1035 | } | |
1036 | ||
1037 | /* Unintern temporary. */ | |
1038 | aspath_unintern(&attr.aspath); | |
1039 | aspath_unintern(&attr_sticky.aspath); | |
1040 | ||
1041 | return 0; | |
128ea8ab | 1042 | } |
1043 | ||
1044 | /* | |
1045 | * Delete all type-2 (MACIP) local routes for this VNI - only from the | |
1046 | * global routing table. These are also scheduled for withdraw from peers. | |
1047 | */ | |
d62a17ae | 1048 | static int delete_global_type2_routes(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1049 | { |
d62a17ae | 1050 | afi_t afi; |
1051 | safi_t safi; | |
1052 | struct bgp_node *rdrn, *rn; | |
1053 | struct bgp_table *table; | |
1054 | struct bgp_info *ri; | |
128ea8ab | 1055 | |
d62a17ae | 1056 | afi = AFI_L2VPN; |
1057 | safi = SAFI_EVPN; | |
128ea8ab | 1058 | |
d62a17ae | 1059 | rdrn = bgp_node_lookup(bgp->rib[afi][safi], (struct prefix *)&vpn->prd); |
1060 | if (rdrn && rdrn->info) { | |
1061 | table = (struct bgp_table *)rdrn->info; | |
1062 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) { | |
1063 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
128ea8ab | 1064 | |
d62a17ae | 1065 | if (evp->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE) |
1066 | continue; | |
128ea8ab | 1067 | |
d62a17ae | 1068 | delete_evpn_route_entry(bgp, vpn, afi, safi, rn, &ri); |
1069 | if (ri) | |
1070 | bgp_process(bgp, rn, afi, safi); | |
1071 | } | |
1072 | } | |
128ea8ab | 1073 | |
d62a17ae | 1074 | /* Unlock RD node. */ |
1075 | if (rdrn) | |
1076 | bgp_unlock_node(rdrn); | |
128ea8ab | 1077 | |
d62a17ae | 1078 | return 0; |
128ea8ab | 1079 | } |
1080 | ||
1081 | /* | |
1082 | * Delete all type-2 (MACIP) local routes for this VNI - from the global | |
1083 | * table as well as the per-VNI route table. | |
1084 | */ | |
d62a17ae | 1085 | static int delete_all_type2_routes(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1086 | { |
d62a17ae | 1087 | afi_t afi; |
1088 | safi_t safi; | |
1089 | struct bgp_node *rn; | |
1090 | struct bgp_info *ri; | |
128ea8ab | 1091 | |
d62a17ae | 1092 | afi = AFI_L2VPN; |
1093 | safi = SAFI_EVPN; | |
128ea8ab | 1094 | |
d62a17ae | 1095 | /* First, walk the global route table for this VNI's type-2 local |
1096 | * routes. | |
1097 | * EVPN routes are a 2-level table, first get the RD table. | |
1098 | */ | |
1099 | delete_global_type2_routes(bgp, vpn); | |
128ea8ab | 1100 | |
d62a17ae | 1101 | /* Next, walk this VNI's route table and delete local type-2 routes. */ |
1102 | for (rn = bgp_table_top(vpn->route_table); rn; | |
1103 | rn = bgp_route_next(rn)) { | |
1104 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
128ea8ab | 1105 | |
d62a17ae | 1106 | if (evp->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE) |
1107 | continue; | |
128ea8ab | 1108 | |
d62a17ae | 1109 | delete_evpn_route_entry(bgp, vpn, afi, safi, rn, &ri); |
128ea8ab | 1110 | |
d62a17ae | 1111 | /* Route entry in local table gets deleted immediately. */ |
1112 | if (ri) | |
1113 | bgp_info_reap(rn, ri); | |
1114 | } | |
128ea8ab | 1115 | |
d62a17ae | 1116 | return 0; |
128ea8ab | 1117 | } |
1118 | ||
1119 | /* | |
1120 | * Delete all routes in the per-VNI route table. | |
1121 | */ | |
d62a17ae | 1122 | static int delete_all_vni_routes(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1123 | { |
d62a17ae | 1124 | struct bgp_node *rn; |
1125 | struct bgp_info *ri, *nextri; | |
128ea8ab | 1126 | |
d62a17ae | 1127 | /* Walk this VNI's route table and delete all routes. */ |
1128 | for (rn = bgp_table_top(vpn->route_table); rn; | |
1129 | rn = bgp_route_next(rn)) { | |
1130 | for (ri = rn->info; (ri != NULL) && (nextri = ri->next, 1); | |
1131 | ri = nextri) { | |
1132 | bgp_info_delete(rn, ri); | |
1133 | bgp_info_reap(rn, ri); | |
1134 | } | |
1135 | } | |
128ea8ab | 1136 | |
d62a17ae | 1137 | return 0; |
128ea8ab | 1138 | } |
1139 | ||
1140 | /* | |
1141 | * Update (and advertise) local routes for a VNI. Invoked upon the VNI | |
1142 | * export RT getting modified or change to tunnel IP. Note that these | |
1143 | * situations need the route in the per-VNI table as well as the global | |
1144 | * table to be updated (as attributes change). | |
1145 | */ | |
d62a17ae | 1146 | static int update_routes_for_vni(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1147 | { |
d62a17ae | 1148 | int ret; |
1149 | struct prefix_evpn p; | |
128ea8ab | 1150 | |
d62a17ae | 1151 | /* Update and advertise the type-3 route (only one) followed by the |
1152 | * locally learnt type-2 routes (MACIP) - for this VNI. | |
1153 | */ | |
1154 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
1155 | ret = update_evpn_route(bgp, vpn, &p, 0); | |
1156 | if (ret) | |
1157 | return ret; | |
128ea8ab | 1158 | |
d62a17ae | 1159 | return update_all_type2_routes(bgp, vpn); |
128ea8ab | 1160 | } |
1161 | ||
1162 | /* | |
1163 | * Delete (and withdraw) local routes for specified VNI from the global | |
1164 | * table and per-VNI table. After this, remove all other routes from | |
1165 | * the per-VNI table. Invoked upon the VNI being deleted or EVPN | |
1166 | * (advertise-all-vni) being disabled. | |
1167 | */ | |
d62a17ae | 1168 | static int delete_routes_for_vni(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1169 | { |
d62a17ae | 1170 | int ret; |
1171 | struct prefix_evpn p; | |
128ea8ab | 1172 | |
d62a17ae | 1173 | /* Delete and withdraw locally learnt type-2 routes (MACIP) |
1174 | * followed by type-3 routes (only one) - for this VNI. | |
1175 | */ | |
1176 | ret = delete_all_type2_routes(bgp, vpn); | |
1177 | if (ret) | |
1178 | return ret; | |
128ea8ab | 1179 | |
d62a17ae | 1180 | build_evpn_type3_prefix(&p, vpn->originator_ip); |
1181 | ret = delete_evpn_route(bgp, vpn, &p); | |
1182 | if (ret) | |
1183 | return ret; | |
128ea8ab | 1184 | |
d62a17ae | 1185 | /* Delete all routes from the per-VNI table. */ |
1186 | return delete_all_vni_routes(bgp, vpn); | |
128ea8ab | 1187 | } |
1188 | ||
1189 | /* | |
1190 | * There is a tunnel endpoint IP address change for this VNI, | |
1191 | * need to re-advertise routes with the new nexthop. | |
1192 | */ | |
d62a17ae | 1193 | static int handle_tunnel_ip_change(struct bgp *bgp, struct bgpevpn *vpn, |
1194 | struct in_addr originator_ip) | |
128ea8ab | 1195 | { |
d62a17ae | 1196 | struct prefix_evpn p; |
128ea8ab | 1197 | |
ddd16ed5 MK |
1198 | /* If VNI is not live, we only need to update the originator ip */ |
1199 | if (!is_vni_live(vpn)) { | |
1200 | vpn->originator_ip = originator_ip; | |
1201 | return 0; | |
1202 | } | |
1203 | ||
db0e1937 MK |
1204 | /* Update the tunnel-ip hash */ |
1205 | bgp_tip_del(bgp, &vpn->originator_ip); | |
1206 | bgp_tip_add(bgp, &originator_ip); | |
1207 | ||
1208 | /* filter routes as martian nexthop db has changed */ | |
1209 | bgp_filter_evpn_routes_upon_martian_nh_change(bgp); | |
1210 | ||
d62a17ae | 1211 | /* Need to withdraw type-3 route as the originator IP is part |
1212 | * of the key. | |
1213 | */ | |
1214 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
1215 | delete_evpn_route(bgp, vpn, &p); | |
128ea8ab | 1216 | |
d62a17ae | 1217 | /* Update the tunnel IP and re-advertise all routes for this VNI. */ |
1218 | vpn->originator_ip = originator_ip; | |
1219 | return update_routes_for_vni(bgp, vpn); | |
128ea8ab | 1220 | } |
1221 | ||
1222 | /* | |
1223 | * Install route entry into the VNI routing table and invoke route selection. | |
1224 | */ | |
d62a17ae | 1225 | static int install_evpn_route_entry(struct bgp *bgp, struct bgpevpn *vpn, |
1226 | struct prefix_evpn *p, | |
1227 | struct bgp_info *parent_ri) | |
1228 | { | |
1229 | struct bgp_node *rn; | |
1230 | struct bgp_info *ri; | |
1231 | struct attr *attr_new; | |
1232 | int ret; | |
1233 | ||
1234 | /* Create (or fetch) route within the VNI. */ | |
1235 | /* NOTE: There is no RD here. */ | |
1236 | rn = bgp_node_get(vpn->route_table, (struct prefix *)p); | |
1237 | ||
1238 | /* Check if route entry is already present. */ | |
1239 | for (ri = rn->info; ri; ri = ri->next) | |
1240 | if (ri->extra | |
1241 | && (struct bgp_info *)ri->extra->parent == parent_ri) | |
1242 | break; | |
1243 | ||
1244 | if (!ri) { | |
1245 | /* Add (or update) attribute to hash. */ | |
1246 | attr_new = bgp_attr_intern(parent_ri->attr); | |
1247 | ||
1248 | /* Create new route with its attribute. */ | |
1249 | ri = info_make(parent_ri->type, parent_ri->sub_type, 0, | |
1250 | parent_ri->peer, attr_new, rn); | |
1251 | SET_FLAG(ri->flags, BGP_INFO_VALID); | |
1252 | bgp_info_extra_get(ri); | |
1253 | ri->extra->parent = parent_ri; | |
1254 | if (parent_ri->extra) | |
1255 | memcpy(&ri->extra->label, &parent_ri->extra->label, | |
1256 | BGP_LABEL_BYTES); | |
1257 | bgp_info_add(rn, ri); | |
1258 | } else { | |
1259 | if (attrhash_cmp(ri->attr, parent_ri->attr) | |
1260 | && !CHECK_FLAG(ri->flags, BGP_INFO_REMOVED)) { | |
1261 | bgp_unlock_node(rn); | |
1262 | return 0; | |
1263 | } | |
1264 | /* The attribute has changed. */ | |
1265 | /* Add (or update) attribute to hash. */ | |
1266 | attr_new = bgp_attr_intern(parent_ri->attr); | |
1267 | ||
1268 | /* Restore route, if needed. */ | |
1269 | if (CHECK_FLAG(ri->flags, BGP_INFO_REMOVED)) | |
1270 | bgp_info_restore(rn, ri); | |
1271 | ||
1272 | /* Mark if nexthop has changed. */ | |
1273 | if (!IPV4_ADDR_SAME(&ri->attr->nexthop, &attr_new->nexthop)) | |
1274 | SET_FLAG(ri->flags, BGP_INFO_IGP_CHANGED); | |
1275 | ||
1276 | /* Unintern existing, set to new. */ | |
1277 | bgp_attr_unintern(&ri->attr); | |
1278 | ri->attr = attr_new; | |
1279 | ri->uptime = bgp_clock(); | |
1280 | } | |
1281 | ||
1282 | /* Perform route selection and update zebra, if required. */ | |
1283 | ret = evpn_route_select_install(bgp, vpn, rn); | |
1284 | ||
1285 | return ret; | |
128ea8ab | 1286 | } |
1287 | ||
1288 | /* | |
1289 | * Uninstall route entry from the VNI routing table and send message | |
1290 | * to zebra, if appropriate. | |
1291 | */ | |
d62a17ae | 1292 | static int uninstall_evpn_route_entry(struct bgp *bgp, struct bgpevpn *vpn, |
1293 | struct prefix_evpn *p, | |
1294 | struct bgp_info *parent_ri) | |
128ea8ab | 1295 | { |
d62a17ae | 1296 | struct bgp_node *rn; |
1297 | struct bgp_info *ri; | |
1298 | int ret; | |
128ea8ab | 1299 | |
d62a17ae | 1300 | /* Locate route within the VNI. */ |
1301 | /* NOTE: There is no RD here. */ | |
1302 | rn = bgp_node_lookup(vpn->route_table, (struct prefix *)p); | |
1303 | if (!rn) | |
1304 | return 0; | |
128ea8ab | 1305 | |
d62a17ae | 1306 | /* Find matching route entry. */ |
1307 | for (ri = rn->info; ri; ri = ri->next) | |
1308 | if (ri->extra | |
1309 | && (struct bgp_info *)ri->extra->parent == parent_ri) | |
1310 | break; | |
128ea8ab | 1311 | |
d62a17ae | 1312 | if (!ri) |
1313 | return 0; | |
128ea8ab | 1314 | |
d62a17ae | 1315 | /* Mark entry for deletion */ |
1316 | bgp_info_delete(rn, ri); | |
128ea8ab | 1317 | |
d62a17ae | 1318 | /* Perform route selection and update zebra, if required. */ |
1319 | ret = evpn_route_select_install(bgp, vpn, rn); | |
128ea8ab | 1320 | |
d62a17ae | 1321 | /* Unlock route node. */ |
1322 | bgp_unlock_node(rn); | |
128ea8ab | 1323 | |
d62a17ae | 1324 | return ret; |
128ea8ab | 1325 | } |
1326 | ||
1327 | /* | |
1328 | * Given a route entry and a VNI, see if this route entry should be | |
1329 | * imported into the VNI i.e., RTs match. | |
1330 | */ | |
d62a17ae | 1331 | static int is_route_matching_for_vni(struct bgp *bgp, struct bgpevpn *vpn, |
1332 | struct bgp_info *ri) | |
1333 | { | |
1334 | struct attr *attr = ri->attr; | |
1335 | struct ecommunity *ecom; | |
1336 | int i; | |
1337 | ||
1338 | assert(attr); | |
1339 | /* Route should have valid RT to be even considered. */ | |
1340 | if (!(attr->flag & ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES))) | |
1341 | return 0; | |
1342 | ||
1343 | ecom = attr->ecommunity; | |
1344 | if (!ecom || !ecom->size) | |
1345 | return 0; | |
1346 | ||
1347 | /* For each extended community RT, see if it matches this VNI. If any RT | |
1348 | * matches, we're done. | |
1349 | */ | |
1350 | for (i = 0; i < ecom->size; i++) { | |
1351 | u_char *pnt; | |
1352 | u_char type, sub_type; | |
1353 | struct ecommunity_val *eval; | |
1354 | struct ecommunity_val eval_tmp; | |
1355 | struct irt_node *irt; | |
1356 | ||
1357 | /* Only deal with RTs */ | |
1358 | pnt = (ecom->val + (i * ECOMMUNITY_SIZE)); | |
1359 | eval = (struct ecommunity_val *)(ecom->val | |
1360 | + (i * ECOMMUNITY_SIZE)); | |
1361 | type = *pnt++; | |
1362 | sub_type = *pnt++; | |
1363 | if (sub_type != ECOMMUNITY_ROUTE_TARGET) | |
1364 | continue; | |
1365 | ||
1366 | /* See if this RT matches specified VNIs import RTs */ | |
1367 | irt = lookup_import_rt(bgp, eval); | |
1368 | if (irt && irt->vnis) | |
1369 | if (is_vni_present_in_irt_vnis(irt->vnis, vpn)) | |
1370 | return 1; | |
1371 | ||
1372 | /* Also check for non-exact match. In this, we mask out the AS | |
1373 | * and | |
1374 | * only check on the local-admin sub-field. This is to | |
1375 | * facilitate using | |
1376 | * VNI as the RT for EBGP peering too. | |
1377 | */ | |
1378 | irt = NULL; | |
1379 | if (type == ECOMMUNITY_ENCODE_AS | |
1380 | || type == ECOMMUNITY_ENCODE_AS4 | |
1381 | || type == ECOMMUNITY_ENCODE_IP) { | |
1382 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
1383 | mask_ecom_global_admin(&eval_tmp, eval); | |
1384 | irt = lookup_import_rt(bgp, &eval_tmp); | |
1385 | } | |
1386 | if (irt && irt->vnis) | |
1387 | if (is_vni_present_in_irt_vnis(irt->vnis, vpn)) | |
1388 | return 1; | |
1389 | } | |
1390 | ||
1391 | return 0; | |
128ea8ab | 1392 | } |
1393 | ||
1394 | /* | |
1395 | * Install or uninstall routes of specified type that are appropriate for this | |
1396 | * particular VNI. | |
1397 | */ | |
d62a17ae | 1398 | static int install_uninstall_routes_for_vni(struct bgp *bgp, |
1399 | struct bgpevpn *vpn, | |
1400 | bgp_evpn_route_type rtype, | |
1401 | int install) | |
1402 | { | |
0291c246 MK |
1403 | afi_t afi; |
1404 | safi_t safi; | |
1405 | struct bgp_node *rd_rn, *rn; | |
1406 | struct bgp_table *table; | |
1407 | struct bgp_info *ri; | |
1408 | int ret; | |
d62a17ae | 1409 | |
1410 | afi = AFI_L2VPN; | |
1411 | safi = SAFI_EVPN; | |
1412 | ||
1413 | /* Walk entire global routing table and evaluate routes which could be | |
1414 | * imported into this VPN. Note that we cannot just look at the routes | |
1415 | * for | |
1416 | * the VNI's RD - remote routes applicable for this VNI could have any | |
1417 | * RD. | |
1418 | */ | |
1419 | /* EVPN routes are a 2-level table. */ | |
1420 | for (rd_rn = bgp_table_top(bgp->rib[afi][safi]); rd_rn; | |
1421 | rd_rn = bgp_route_next(rd_rn)) { | |
1422 | table = (struct bgp_table *)(rd_rn->info); | |
1423 | if (!table) | |
1424 | continue; | |
1425 | ||
1426 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) { | |
1427 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
1428 | ||
1429 | if (evp->prefix.route_type != rtype) | |
1430 | continue; | |
1431 | ||
1432 | for (ri = rn->info; ri; ri = ri->next) { | |
1433 | /* Consider "valid" remote routes applicable for | |
1434 | * this VNI. */ | |
1435 | if (!(CHECK_FLAG(ri->flags, BGP_INFO_VALID) | |
1436 | && ri->type == ZEBRA_ROUTE_BGP | |
1437 | && ri->sub_type == BGP_ROUTE_NORMAL)) | |
1438 | continue; | |
1439 | ||
1440 | if (is_route_matching_for_vni(bgp, vpn, ri)) { | |
1441 | if (install) | |
1442 | ret = install_evpn_route_entry( | |
60466a63 | 1443 | bgp, vpn, evp, ri); |
d62a17ae | 1444 | else |
1445 | ret = uninstall_evpn_route_entry( | |
1446 | bgp, vpn, evp, ri); | |
1447 | ||
1448 | if (ret) { | |
1449 | zlog_err( | |
1450 | "%u: Failed to %s EVPN %s route in VNI %u", | |
1451 | bgp->vrf_id, | |
1452 | install ? "install" | |
1453 | : "uninstall", | |
1454 | rtype == BGP_EVPN_MAC_IP_ROUTE | |
1455 | ? "MACIP" | |
1456 | : "IMET", | |
1457 | vpn->vni); | |
1458 | return ret; | |
1459 | } | |
1460 | } | |
1461 | } | |
1462 | } | |
1463 | } | |
1464 | ||
1465 | return 0; | |
128ea8ab | 1466 | } |
1467 | ||
1468 | /* | |
1469 | * Install any existing remote routes applicable for this VNI into its | |
1470 | * routing table. This is invoked when a VNI becomes "live" or its Import | |
1471 | * RT is changed. | |
1472 | */ | |
d62a17ae | 1473 | static int install_routes_for_vni(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 1474 | { |
d62a17ae | 1475 | int ret; |
128ea8ab | 1476 | |
d62a17ae | 1477 | /* Install type-3 routes followed by type-2 routes - the ones applicable |
1478 | * for this VNI. | |
1479 | */ | |
1480 | ret = install_uninstall_routes_for_vni(bgp, vpn, BGP_EVPN_IMET_ROUTE, | |
1481 | 1); | |
1482 | if (ret) | |
1483 | return ret; | |
128ea8ab | 1484 | |
d62a17ae | 1485 | return install_uninstall_routes_for_vni(bgp, vpn, BGP_EVPN_MAC_IP_ROUTE, |
1486 | 1); | |
128ea8ab | 1487 | } |
1488 | ||
90e60aa7 | 1489 | /* |
1490 | * Uninstall any existing remote routes for this VNI. One scenario in which | |
1491 | * this is invoked is upon an import RT change. | |
1492 | */ | |
d62a17ae | 1493 | static int uninstall_routes_for_vni(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 1494 | { |
d62a17ae | 1495 | int ret; |
90e60aa7 | 1496 | |
d62a17ae | 1497 | /* Uninstall type-2 routes followed by type-3 routes - the ones |
1498 | * applicable | |
1499 | * for this VNI. | |
1500 | */ | |
1501 | ret = install_uninstall_routes_for_vni(bgp, vpn, BGP_EVPN_MAC_IP_ROUTE, | |
1502 | 0); | |
1503 | if (ret) | |
1504 | return ret; | |
90e60aa7 | 1505 | |
d62a17ae | 1506 | return install_uninstall_routes_for_vni(bgp, vpn, BGP_EVPN_IMET_ROUTE, |
1507 | 0); | |
90e60aa7 | 1508 | } |
1509 | ||
128ea8ab | 1510 | /* |
1511 | * Install or uninstall route in matching VNIs (list). | |
1512 | */ | |
d62a17ae | 1513 | static int install_uninstall_route_in_vnis(struct bgp *bgp, afi_t afi, |
1514 | safi_t safi, struct prefix_evpn *evp, | |
1515 | struct bgp_info *ri, | |
1516 | struct list *vnis, int install) | |
128ea8ab | 1517 | { |
d62a17ae | 1518 | struct bgpevpn *vpn; |
1519 | struct listnode *node, *nnode; | |
128ea8ab | 1520 | |
d62a17ae | 1521 | for (ALL_LIST_ELEMENTS(vnis, node, nnode, vpn)) { |
1522 | int ret; | |
128ea8ab | 1523 | |
d62a17ae | 1524 | if (!is_vni_live(vpn)) |
1525 | continue; | |
128ea8ab | 1526 | |
d62a17ae | 1527 | if (install) |
1528 | ret = install_evpn_route_entry(bgp, vpn, evp, ri); | |
1529 | else | |
1530 | ret = uninstall_evpn_route_entry(bgp, vpn, evp, ri); | |
128ea8ab | 1531 | |
d62a17ae | 1532 | if (ret) { |
1533 | zlog_err("%u: Failed to %s EVPN %s route in VNI %u", | |
1534 | bgp->vrf_id, install ? "install" : "uninstall", | |
1535 | evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE | |
1536 | ? "MACIP" | |
1537 | : "IMET", | |
1538 | vpn->vni); | |
1539 | return ret; | |
1540 | } | |
1541 | } | |
128ea8ab | 1542 | |
d62a17ae | 1543 | return 0; |
128ea8ab | 1544 | } |
1545 | ||
1546 | /* | |
1547 | * Install or uninstall route for appropriate VNIs. | |
1548 | */ | |
d62a17ae | 1549 | static int install_uninstall_evpn_route(struct bgp *bgp, afi_t afi, safi_t safi, |
1550 | struct prefix *p, struct bgp_info *ri, | |
1551 | int import) | |
1552 | { | |
1553 | struct prefix_evpn *evp = (struct prefix_evpn *)p; | |
1554 | struct attr *attr = ri->attr; | |
1555 | struct ecommunity *ecom; | |
1556 | int i; | |
1557 | ||
1558 | assert(attr); | |
1559 | ||
1560 | /* Only type-2 and type-3 routes go into a L2 VNI. */ | |
1561 | if (!(evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE | |
1562 | || evp->prefix.route_type == BGP_EVPN_IMET_ROUTE)) | |
1563 | return 0; | |
1564 | ||
1565 | /* If we don't have Route Target, nothing much to do. */ | |
1566 | if (!(attr->flag & ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES))) | |
1567 | return 0; | |
1568 | ||
1569 | ecom = attr->ecommunity; | |
1570 | if (!ecom || !ecom->size) | |
1571 | return -1; | |
1572 | ||
1573 | /* For each extended community RT, see which VNIs match and import | |
1574 | * the route into matching VNIs. | |
1575 | */ | |
1576 | for (i = 0; i < ecom->size; i++) { | |
1577 | u_char *pnt; | |
1578 | u_char type, sub_type; | |
1579 | struct ecommunity_val *eval; | |
1580 | struct ecommunity_val eval_tmp; | |
1581 | struct irt_node *irt; | |
1582 | ||
1583 | /* Only deal with RTs */ | |
1584 | pnt = (ecom->val + (i * ECOMMUNITY_SIZE)); | |
1585 | eval = (struct ecommunity_val *)(ecom->val | |
1586 | + (i * ECOMMUNITY_SIZE)); | |
1587 | type = *pnt++; | |
1588 | sub_type = *pnt++; | |
1589 | if (sub_type != ECOMMUNITY_ROUTE_TARGET) | |
1590 | continue; | |
1591 | ||
1592 | /* Are we interested in this RT? */ | |
1593 | irt = lookup_import_rt(bgp, eval); | |
1594 | if (irt && irt->vnis) | |
1595 | install_uninstall_route_in_vnis(bgp, afi, safi, evp, ri, | |
1596 | irt->vnis, import); | |
1597 | ||
1598 | /* Also check for non-exact match. In this, we mask out the AS | |
1599 | * and | |
1600 | * only check on the local-admin sub-field. This is to | |
1601 | * facilitate using | |
1602 | * VNI as the RT for EBGP peering too. | |
1603 | */ | |
1604 | irt = NULL; | |
1605 | if (type == ECOMMUNITY_ENCODE_AS | |
1606 | || type == ECOMMUNITY_ENCODE_AS4 | |
1607 | || type == ECOMMUNITY_ENCODE_IP) { | |
1608 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
1609 | mask_ecom_global_admin(&eval_tmp, eval); | |
1610 | irt = lookup_import_rt(bgp, &eval_tmp); | |
1611 | } | |
1612 | if (irt && irt->vnis) | |
1613 | install_uninstall_route_in_vnis(bgp, afi, safi, evp, ri, | |
1614 | irt->vnis, import); | |
1615 | } | |
1616 | ||
1617 | return 0; | |
128ea8ab | 1618 | } |
1619 | ||
90e60aa7 | 1620 | /* |
1621 | * Update and advertise local routes for a VNI. Invoked upon router-id | |
1622 | * change. Note that the processing is done only on the global route table | |
1623 | * using routes that already exist in the per-VNI table. | |
1624 | */ | |
d62a17ae | 1625 | static int update_advertise_vni_routes(struct bgp *bgp, struct bgpevpn *vpn) |
1626 | { | |
1627 | struct prefix_evpn p; | |
1628 | struct bgp_node *rn, *global_rn; | |
1629 | struct bgp_info *ri, *global_ri; | |
1630 | struct attr *attr; | |
1631 | afi_t afi = AFI_L2VPN; | |
1632 | safi_t safi = SAFI_EVPN; | |
1633 | ||
1634 | /* Locate type-3 route for VNI in the per-VNI table and use its | |
1635 | * attributes to create and advertise the type-3 route for this VNI | |
1636 | * in the global table. | |
1637 | */ | |
1638 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
1639 | rn = bgp_node_lookup(vpn->route_table, (struct prefix *)&p); | |
1640 | if (!rn) /* unexpected */ | |
1641 | return 0; | |
1642 | for (ri = rn->info; ri; ri = ri->next) | |
1643 | if (ri->peer == bgp->peer_self && ri->type == ZEBRA_ROUTE_BGP | |
1644 | && ri->sub_type == BGP_ROUTE_STATIC) | |
1645 | break; | |
1646 | if (!ri) /* unexpected */ | |
1647 | return 0; | |
1648 | attr = ri->attr; | |
1649 | ||
1650 | global_rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, | |
1651 | (struct prefix *)&p, &vpn->prd); | |
1a98c087 MK |
1652 | update_evpn_route_entry(bgp, vpn, afi, safi, global_rn, attr, 1, 0, &ri, |
1653 | 0); | |
d62a17ae | 1654 | |
1655 | /* Schedule for processing and unlock node. */ | |
1656 | bgp_process(bgp, global_rn, afi, safi); | |
1657 | bgp_unlock_node(global_rn); | |
1658 | ||
1659 | /* Now, walk this VNI's route table and use the route and its attribute | |
1660 | * to create and schedule route in global table. | |
1661 | */ | |
1662 | for (rn = bgp_table_top(vpn->route_table); rn; | |
1663 | rn = bgp_route_next(rn)) { | |
1664 | struct prefix_evpn *evp = (struct prefix_evpn *)&rn->p; | |
1665 | ||
1666 | /* Identify MAC-IP local routes. */ | |
1667 | if (evp->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE) | |
1668 | continue; | |
1669 | ||
1670 | for (ri = rn->info; ri; ri = ri->next) | |
1671 | if (ri->peer == bgp->peer_self | |
1672 | && ri->type == ZEBRA_ROUTE_BGP | |
1673 | && ri->sub_type == BGP_ROUTE_STATIC) | |
1674 | break; | |
1675 | if (!ri) | |
1676 | continue; | |
1677 | ||
1678 | /* Create route in global routing table using this route entry's | |
1679 | * attribute. | |
1680 | */ | |
1681 | attr = ri->attr; | |
1682 | global_rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, | |
1683 | (struct prefix *)evp, &vpn->prd); | |
1684 | assert(global_rn); | |
1685 | update_evpn_route_entry(bgp, vpn, afi, safi, global_rn, attr, 1, | |
1a98c087 | 1686 | 0, &global_ri, 0); |
d62a17ae | 1687 | |
1688 | /* Schedule for processing and unlock node. */ | |
1689 | bgp_process(bgp, global_rn, afi, safi); | |
1690 | bgp_unlock_node(global_rn); | |
1691 | } | |
1692 | ||
1693 | return 0; | |
90e60aa7 | 1694 | } |
1695 | ||
1696 | /* | |
1697 | * Delete (and withdraw) local routes for a VNI - only from the global | |
1698 | * table. Invoked upon router-id change. | |
1699 | */ | |
d62a17ae | 1700 | static int delete_withdraw_vni_routes(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 1701 | { |
d62a17ae | 1702 | int ret; |
1703 | struct prefix_evpn p; | |
1704 | struct bgp_node *global_rn; | |
1705 | struct bgp_info *ri; | |
1706 | afi_t afi = AFI_L2VPN; | |
1707 | safi_t safi = SAFI_EVPN; | |
90e60aa7 | 1708 | |
d62a17ae | 1709 | /* Delete and withdraw locally learnt type-2 routes (MACIP) |
1710 | * for this VNI - from the global table. | |
1711 | */ | |
1712 | ret = delete_global_type2_routes(bgp, vpn); | |
1713 | if (ret) | |
1714 | return ret; | |
90e60aa7 | 1715 | |
d62a17ae | 1716 | /* Remove type-3 route for this VNI from global table. */ |
1717 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
1718 | global_rn = bgp_afi_node_lookup(bgp->rib[afi][safi], afi, safi, | |
1719 | (struct prefix *)&p, &vpn->prd); | |
1720 | if (global_rn) { | |
1721 | /* Delete route entry in the global EVPN table. */ | |
1722 | delete_evpn_route_entry(bgp, vpn, afi, safi, global_rn, &ri); | |
90e60aa7 | 1723 | |
d62a17ae | 1724 | /* Schedule for processing - withdraws to peers happen from |
1725 | * this table. | |
1726 | */ | |
1727 | if (ri) | |
1728 | bgp_process(bgp, global_rn, afi, safi); | |
1729 | bgp_unlock_node(global_rn); | |
1730 | } | |
90e60aa7 | 1731 | |
d62a17ae | 1732 | return 0; |
90e60aa7 | 1733 | } |
1734 | ||
2d48ee25 | 1735 | /* |
1736 | * Handle router-id change. Update and advertise local routes corresponding | |
1737 | * to this VNI from peers. Note that this is invoked after updating the | |
1738 | * router-id. The routes in the per-VNI table are used to create routes in | |
1739 | * the global table and schedule them. | |
1740 | */ | |
d62a17ae | 1741 | static void update_router_id_vni(struct hash_backet *backet, struct bgp *bgp) |
2d48ee25 | 1742 | { |
d62a17ae | 1743 | struct bgpevpn *vpn; |
2d48ee25 | 1744 | |
d62a17ae | 1745 | vpn = (struct bgpevpn *)backet->data; |
2d48ee25 | 1746 | |
d62a17ae | 1747 | if (!vpn) { |
1748 | zlog_warn("%s: VNI hash entry for VNI not found", __FUNCTION__); | |
1749 | return; | |
1750 | } | |
2d48ee25 | 1751 | |
d62a17ae | 1752 | /* Skip VNIs with configured RD. */ |
1753 | if (is_rd_configured(vpn)) | |
1754 | return; | |
2d48ee25 | 1755 | |
d62a17ae | 1756 | bgp_evpn_derive_auto_rd(bgp, vpn); |
1757 | update_advertise_vni_routes(bgp, vpn); | |
2d48ee25 | 1758 | } |
1759 | ||
1760 | /* | |
1761 | * Handle router-id change. Delete and withdraw local routes corresponding | |
1762 | * to this VNI from peers. Note that this is invoked prior to updating | |
1763 | * the router-id and is done only on the global route table, the routes | |
1764 | * are needed in the per-VNI table to re-advertise with new router id. | |
1765 | */ | |
d62a17ae | 1766 | static void withdraw_router_id_vni(struct hash_backet *backet, struct bgp *bgp) |
2d48ee25 | 1767 | { |
d62a17ae | 1768 | struct bgpevpn *vpn; |
2d48ee25 | 1769 | |
d62a17ae | 1770 | vpn = (struct bgpevpn *)backet->data; |
2d48ee25 | 1771 | |
d62a17ae | 1772 | if (!vpn) { |
1773 | zlog_warn("%s: VNI hash entry for VNI not found", __FUNCTION__); | |
1774 | return; | |
1775 | } | |
2d48ee25 | 1776 | |
d62a17ae | 1777 | /* Skip VNIs with configured RD. */ |
1778 | if (is_rd_configured(vpn)) | |
1779 | return; | |
2d48ee25 | 1780 | |
d62a17ae | 1781 | delete_withdraw_vni_routes(bgp, vpn); |
2d48ee25 | 1782 | } |
1783 | ||
128ea8ab | 1784 | /* |
1785 | * Process received EVPN type-2 route (advertise or withdraw). | |
1786 | */ | |
d62a17ae | 1787 | static int process_type2_route(struct peer *peer, afi_t afi, safi_t safi, |
1788 | struct attr *attr, u_char *pfx, int psize, | |
1789 | u_int32_t addpath_id) | |
1790 | { | |
1791 | struct prefix_rd prd; | |
1792 | struct prefix_evpn p; | |
1793 | u_char ipaddr_len; | |
1794 | u_char macaddr_len; | |
1795 | mpls_label_t *label_pnt; | |
1796 | int ret; | |
1797 | ||
1798 | /* Type-2 route should be either 33, 37 or 49 bytes or an | |
1799 | * additional 3 bytes if there is a second label (VNI): | |
1800 | * RD (8), ESI (10), Eth Tag (4), MAC Addr Len (1), | |
1801 | * MAC Addr (6), IP len (1), IP (0, 4 or 16), | |
1802 | * MPLS Lbl1 (3), MPLS Lbl2 (0 or 3) | |
1803 | */ | |
1804 | if (psize != 33 && psize != 37 && psize != 49 && psize != 36 | |
1805 | && psize != 40 && psize != 52) { | |
1806 | zlog_err("%u:%s - Rx EVPN Type-2 NLRI with invalid length %d", | |
1807 | peer->bgp->vrf_id, peer->host, psize); | |
1808 | return -1; | |
1809 | } | |
1810 | ||
1811 | /* Make prefix_rd */ | |
1812 | prd.family = AF_UNSPEC; | |
1813 | prd.prefixlen = 64; | |
1814 | memcpy(&prd.val, pfx, 8); | |
1815 | pfx += 8; | |
1816 | ||
1817 | /* Make EVPN prefix. */ | |
1818 | memset(&p, 0, sizeof(struct prefix_evpn)); | |
b03b8898 | 1819 | p.family = AF_EVPN; |
d62a17ae | 1820 | p.prefixlen = EVPN_TYPE_2_ROUTE_PREFIXLEN; |
1821 | p.prefix.route_type = BGP_EVPN_MAC_IP_ROUTE; | |
1822 | ||
1823 | /* Skip over Ethernet Seg Identifier for now. */ | |
1824 | pfx += 10; | |
1825 | ||
1826 | /* Skip over Ethernet Tag for now. */ | |
1827 | pfx += 4; | |
1828 | ||
1829 | /* Get the MAC Addr len */ | |
1830 | macaddr_len = *pfx++; | |
1831 | ||
1832 | /* Get the MAC Addr */ | |
28328ea9 DS |
1833 | if (macaddr_len == (ETH_ALEN * 8)) { |
1834 | memcpy(&p.prefix.mac.octet, pfx, ETH_ALEN); | |
1835 | pfx += ETH_ALEN; | |
d62a17ae | 1836 | } else { |
1837 | zlog_err( | |
1838 | "%u:%s - Rx EVPN Type-2 NLRI with unsupported MAC address length %d", | |
1839 | peer->bgp->vrf_id, peer->host, macaddr_len); | |
1840 | return -1; | |
1841 | } | |
1842 | ||
1843 | ||
1844 | /* Get the IP. */ | |
1845 | ipaddr_len = *pfx++; | |
1846 | if (ipaddr_len != 0 && ipaddr_len != IPV4_MAX_BITLEN | |
1847 | && ipaddr_len != IPV6_MAX_BITLEN) { | |
1848 | zlog_err( | |
1849 | "%u:%s - Rx EVPN Type-2 NLRI with unsupported IP address length %d", | |
1850 | peer->bgp->vrf_id, peer->host, ipaddr_len); | |
1851 | return -1; | |
1852 | } | |
1853 | ||
1854 | if (ipaddr_len) { | |
1855 | ipaddr_len /= 8; /* Convert to bytes. */ | |
1856 | p.prefix.ip.ipa_type = (ipaddr_len == IPV4_MAX_BYTELEN) | |
1857 | ? IPADDR_V4 | |
1858 | : IPADDR_V6; | |
1859 | memcpy(&p.prefix.ip.ip.addr, pfx, ipaddr_len); | |
1860 | } | |
1861 | pfx += ipaddr_len; | |
1862 | ||
1863 | /* Get the VNI (in MPLS label field). */ | |
1864 | /* Note: We ignore the second VNI, if any. */ | |
1865 | label_pnt = (mpls_label_t *)pfx; | |
1866 | ||
1867 | /* Process the route. */ | |
1868 | if (attr) | |
1869 | ret = bgp_update(peer, (struct prefix *)&p, addpath_id, attr, | |
1870 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
1871 | &prd, label_pnt, 0, NULL); | |
1872 | else | |
1873 | ret = bgp_withdraw(peer, (struct prefix *)&p, addpath_id, attr, | |
1874 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
1875 | &prd, label_pnt, NULL); | |
1876 | return ret; | |
128ea8ab | 1877 | } |
1878 | ||
1879 | /* | |
1880 | * Process received EVPN type-3 route (advertise or withdraw). | |
1881 | */ | |
d62a17ae | 1882 | static int process_type3_route(struct peer *peer, afi_t afi, safi_t safi, |
1883 | struct attr *attr, u_char *pfx, int psize, | |
1884 | u_int32_t addpath_id) | |
1885 | { | |
1886 | struct prefix_rd prd; | |
1887 | struct prefix_evpn p; | |
1888 | u_char ipaddr_len; | |
1889 | int ret; | |
1890 | ||
1891 | /* Type-3 route should be either 17 or 29 bytes: RD (8), Eth Tag (4), | |
1892 | * IP len (1) and IP (4 or 16). | |
1893 | */ | |
1894 | if (psize != 17 && psize != 29) { | |
1895 | zlog_err("%u:%s - Rx EVPN Type-3 NLRI with invalid length %d", | |
1896 | peer->bgp->vrf_id, peer->host, psize); | |
1897 | return -1; | |
1898 | } | |
1899 | ||
1900 | /* Make prefix_rd */ | |
1901 | prd.family = AF_UNSPEC; | |
1902 | prd.prefixlen = 64; | |
1903 | memcpy(&prd.val, pfx, 8); | |
1904 | pfx += 8; | |
1905 | ||
1906 | /* Make EVPN prefix. */ | |
1907 | memset(&p, 0, sizeof(struct prefix_evpn)); | |
b03b8898 | 1908 | p.family = AF_EVPN; |
d62a17ae | 1909 | p.prefixlen = EVPN_TYPE_3_ROUTE_PREFIXLEN; |
1910 | p.prefix.route_type = BGP_EVPN_IMET_ROUTE; | |
1911 | ||
1912 | /* Skip over Ethernet Tag for now. */ | |
1913 | pfx += 4; | |
1914 | ||
1915 | /* Get the IP. */ | |
1916 | ipaddr_len = *pfx++; | |
1917 | if (ipaddr_len == IPV4_MAX_BITLEN) { | |
1918 | p.prefix.ip.ipa_type = IPADDR_V4; | |
1919 | memcpy(&p.prefix.ip.ip.addr, pfx, IPV4_MAX_BYTELEN); | |
1920 | } else { | |
1921 | zlog_err( | |
1922 | "%u:%s - Rx EVPN Type-3 NLRI with unsupported IP address length %d", | |
1923 | peer->bgp->vrf_id, peer->host, ipaddr_len); | |
1924 | return -1; | |
1925 | } | |
1926 | ||
1927 | /* Process the route. */ | |
1928 | if (attr) | |
1929 | ret = bgp_update(peer, (struct prefix *)&p, addpath_id, attr, | |
1930 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
1931 | &prd, NULL, 0, NULL); | |
1932 | else | |
1933 | ret = bgp_withdraw(peer, (struct prefix *)&p, addpath_id, attr, | |
1934 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
1935 | &prd, NULL, NULL); | |
1936 | return ret; | |
128ea8ab | 1937 | } |
1938 | ||
1939 | /* | |
1940 | * Process received EVPN type-5 route (advertise or withdraw). | |
1941 | */ | |
d62a17ae | 1942 | static int process_type5_route(struct peer *peer, afi_t afi, safi_t safi, |
1943 | struct attr *attr, u_char *pfx, int psize, | |
1944 | u_int32_t addpath_id, int withdraw) | |
1945 | { | |
1946 | struct prefix_rd prd; | |
1947 | struct prefix_evpn p; | |
1948 | struct bgp_route_evpn evpn; | |
1949 | u_char ippfx_len; | |
1950 | u_int32_t eth_tag; | |
1951 | mpls_label_t *label_pnt; | |
1952 | int ret; | |
1953 | ||
1954 | /* Type-5 route should be 34 or 58 bytes: | |
1955 | * RD (8), ESI (10), Eth Tag (4), IP len (1), IP (4 or 16), | |
1956 | * GW (4 or 16) and VNI (3). | |
1957 | * Note that the IP and GW should both be IPv4 or both IPv6. | |
1958 | */ | |
1959 | if (psize != 34 && psize != 58) { | |
1960 | zlog_err("%u:%s - Rx EVPN Type-5 NLRI with invalid length %d", | |
1961 | peer->bgp->vrf_id, peer->host, psize); | |
1962 | return -1; | |
1963 | } | |
1964 | ||
1965 | /* Make prefix_rd */ | |
1966 | prd.family = AF_UNSPEC; | |
1967 | prd.prefixlen = 64; | |
1968 | memcpy(&prd.val, pfx, 8); | |
1969 | pfx += 8; | |
1970 | ||
1971 | /* Make EVPN prefix. */ | |
1972 | memset(&p, 0, sizeof(struct prefix_evpn)); | |
b03b8898 | 1973 | p.family = AF_EVPN; |
d62a17ae | 1974 | p.prefix.route_type = BGP_EVPN_IP_PREFIX_ROUTE; |
1975 | ||
1976 | /* Additional information outside of prefix - ESI and GW IP */ | |
1977 | memset(&evpn, 0, sizeof(evpn)); | |
1978 | ||
1979 | /* Fetch ESI */ | |
1980 | memcpy(&evpn.eth_s_id.val, pfx, 10); | |
1981 | pfx += 10; | |
1982 | ||
1983 | /* Fetch Ethernet Tag. */ | |
1984 | memcpy(ð_tag, pfx, 4); | |
1985 | p.prefix.eth_tag = ntohl(eth_tag); | |
1986 | pfx += 4; | |
1987 | ||
1988 | /* Fetch IP prefix length. */ | |
1989 | ippfx_len = *pfx++; | |
1990 | if (ippfx_len > IPV6_MAX_BITLEN) { | |
1991 | zlog_err( | |
1992 | "%u:%s - Rx EVPN Type-5 NLRI with invalid IP Prefix length %d", | |
1993 | peer->bgp->vrf_id, peer->host, ippfx_len); | |
1994 | return -1; | |
1995 | } | |
1996 | p.prefix.ip_prefix_length = ippfx_len; | |
1997 | ||
1998 | /* Determine IPv4 or IPv6 prefix */ | |
1999 | /* Since the address and GW are from the same family, this just becomes | |
2000 | * a simple check on the total size. | |
2001 | */ | |
2002 | if (psize == 34) { | |
2003 | SET_IPADDR_V4(&p.prefix.ip); | |
2004 | memcpy(&p.prefix.ip.ipaddr_v4, pfx, 4); | |
2005 | pfx += 4; | |
2006 | memcpy(&evpn.gw_ip.ipv4, pfx, 4); | |
2007 | pfx += 4; | |
2008 | p.prefixlen = PREFIX_LEN_ROUTE_TYPE_5_IPV4; | |
2009 | } else { | |
2010 | SET_IPADDR_V6(&p.prefix.ip); | |
2011 | memcpy(&p.prefix.ip.ipaddr_v6, pfx, 16); | |
2012 | pfx += 16; | |
2013 | memcpy(&evpn.gw_ip.ipv6, pfx, 16); | |
2014 | pfx += 16; | |
2015 | p.prefixlen = PREFIX_LEN_ROUTE_TYPE_5_IPV6; | |
2016 | } | |
2017 | ||
2018 | label_pnt = (mpls_label_t *)pfx; | |
2019 | ||
2020 | /* Process the route. */ | |
2021 | if (!withdraw) | |
2022 | ret = bgp_update(peer, (struct prefix *)&p, addpath_id, attr, | |
2023 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
2024 | &prd, label_pnt, 0, &evpn); | |
2025 | else | |
2026 | ret = bgp_withdraw(peer, (struct prefix *)&p, addpath_id, attr, | |
2027 | afi, safi, ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, | |
2028 | &prd, label_pnt, &evpn); | |
2029 | ||
2030 | return ret; | |
2031 | } | |
2032 | ||
2033 | static void evpn_mpattr_encode_type5(struct stream *s, struct prefix *p, | |
2034 | struct prefix_rd *prd, mpls_label_t *label, | |
2035 | struct attr *attr) | |
2036 | { | |
2037 | int len; | |
2038 | char temp[16]; | |
2039 | struct evpn_addr *p_evpn_p; | |
2040 | ||
2041 | memset(&temp, 0, 16); | |
b03b8898 | 2042 | if (p->family != AF_EVPN) |
d62a17ae | 2043 | return; |
2044 | p_evpn_p = &(p->u.prefix_evpn); | |
2045 | ||
2046 | if (IS_IPADDR_V4(&p_evpn_p->ip)) | |
2047 | len = 8; /* ipv4 */ | |
2048 | else | |
2049 | len = 32; /* ipv6 */ | |
d62a17ae | 2050 | /* Prefix contains RD, ESI, EthTag, IP length, IP, GWIP and VNI */ |
2051 | stream_putc(s, 8 + 10 + 4 + 1 + len + 3); | |
2052 | stream_put(s, prd->val, 8); | |
0af35d90 | 2053 | if (attr) |
d62a17ae | 2054 | stream_put(s, &(attr->evpn_overlay.eth_s_id), 10); |
2055 | else | |
2056 | stream_put(s, &temp, 10); | |
2057 | stream_putl(s, p_evpn_p->eth_tag); | |
2058 | stream_putc(s, p_evpn_p->ip_prefix_length); | |
2059 | if (IS_IPADDR_V4(&p_evpn_p->ip)) | |
2060 | stream_put_ipv4(s, p_evpn_p->ip.ipaddr_v4.s_addr); | |
2061 | else | |
2062 | stream_put(s, &p_evpn_p->ip.ipaddr_v6, 16); | |
0af35d90 | 2063 | if (attr) { |
d62a17ae | 2064 | if (IS_IPADDR_V4(&p_evpn_p->ip)) |
2065 | stream_put_ipv4(s, | |
2066 | attr->evpn_overlay.gw_ip.ipv4.s_addr); | |
2067 | else | |
2068 | stream_put(s, &(attr->evpn_overlay.gw_ip.ipv6), 16); | |
2069 | } else { | |
2070 | if (IS_IPADDR_V4(&p_evpn_p->ip)) | |
2071 | stream_put_ipv4(s, 0); | |
2072 | else | |
2073 | stream_put(s, &temp, 16); | |
2074 | } | |
2075 | ||
2076 | if (label) | |
2077 | stream_put(s, label, 3); | |
2078 | else | |
2079 | stream_put3(s, 0); | |
128ea8ab | 2080 | } |
2081 | ||
2082 | /* | |
2083 | * Cleanup specific VNI upon EVPN (advertise-all-vni) being disabled. | |
2084 | */ | |
d62a17ae | 2085 | static void cleanup_vni_on_disable(struct hash_backet *backet, struct bgp *bgp) |
128ea8ab | 2086 | { |
d62a17ae | 2087 | struct bgpevpn *vpn = (struct bgpevpn *)backet->data; |
128ea8ab | 2088 | |
d62a17ae | 2089 | /* Remove EVPN routes and schedule for processing. */ |
2090 | delete_routes_for_vni(bgp, vpn); | |
128ea8ab | 2091 | |
d62a17ae | 2092 | /* Clear "live" flag and see if hash needs to be freed. */ |
2093 | UNSET_FLAG(vpn->flags, VNI_FLAG_LIVE); | |
2094 | if (!is_vni_configured(vpn)) | |
2095 | bgp_evpn_free(bgp, vpn); | |
128ea8ab | 2096 | } |
2097 | ||
2098 | /* | |
2099 | * Free a VNI entry; iterator function called during cleanup. | |
2100 | */ | |
d62a17ae | 2101 | static void free_vni_entry(struct hash_backet *backet, struct bgp *bgp) |
128ea8ab | 2102 | { |
d62a17ae | 2103 | struct bgpevpn *vpn; |
128ea8ab | 2104 | |
d62a17ae | 2105 | vpn = (struct bgpevpn *)backet->data; |
2106 | delete_all_vni_routes(bgp, vpn); | |
2107 | bgp_evpn_free(bgp, vpn); | |
128ea8ab | 2108 | } |
2109 | ||
2110 | ||
2111 | /* | |
2112 | * Public functions. | |
2113 | */ | |
2114 | ||
2d48ee25 | 2115 | /* |
2116 | * Handle change to BGP router id. This is invoked twice by the change | |
2117 | * handler, first before the router id has been changed and then after | |
2118 | * the router id has been changed. The first invocation will result in | |
2119 | * local routes for all VNIs being deleted and withdrawn and the next | |
2120 | * will result in the routes being re-advertised. | |
2121 | */ | |
d62a17ae | 2122 | void bgp_evpn_handle_router_id_update(struct bgp *bgp, int withdraw) |
2d48ee25 | 2123 | { |
d62a17ae | 2124 | if (withdraw) |
2125 | hash_iterate(bgp->vnihash, | |
2126 | (void (*)(struct hash_backet *, | |
2127 | void *))withdraw_router_id_vni, | |
2128 | bgp); | |
2129 | else | |
2130 | hash_iterate(bgp->vnihash, | |
2131 | (void (*)(struct hash_backet *, | |
2132 | void *))update_router_id_vni, | |
2133 | bgp); | |
2d48ee25 | 2134 | } |
2135 | ||
90e60aa7 | 2136 | /* |
2137 | * Handle change to export RT - update and advertise local routes. | |
2138 | */ | |
d62a17ae | 2139 | int bgp_evpn_handle_export_rt_change(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 2140 | { |
d62a17ae | 2141 | return update_routes_for_vni(bgp, vpn); |
90e60aa7 | 2142 | } |
2143 | ||
2144 | /* | |
2145 | * Handle change to RD. This is invoked twice by the change handler, | |
2146 | * first before the RD has been changed and then after the RD has | |
2147 | * been changed. The first invocation will result in local routes | |
2148 | * of this VNI being deleted and withdrawn and the next will result | |
2149 | * in the routes being re-advertised. | |
2150 | */ | |
d62a17ae | 2151 | void bgp_evpn_handle_rd_change(struct bgp *bgp, struct bgpevpn *vpn, |
2152 | int withdraw) | |
90e60aa7 | 2153 | { |
d62a17ae | 2154 | if (withdraw) |
2155 | delete_withdraw_vni_routes(bgp, vpn); | |
2156 | else | |
2157 | update_advertise_vni_routes(bgp, vpn); | |
90e60aa7 | 2158 | } |
2159 | ||
2160 | /* | |
2161 | * Install routes for this VNI. Invoked upon change to Import RT. | |
2162 | */ | |
d62a17ae | 2163 | int bgp_evpn_install_routes(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 2164 | { |
d62a17ae | 2165 | return install_routes_for_vni(bgp, vpn); |
90e60aa7 | 2166 | } |
2167 | ||
2168 | /* | |
2169 | * Uninstall all routes installed for this VNI. Invoked upon change | |
2170 | * to Import RT. | |
2171 | */ | |
d62a17ae | 2172 | int bgp_evpn_uninstall_routes(struct bgp *bgp, struct bgpevpn *vpn) |
90e60aa7 | 2173 | { |
d62a17ae | 2174 | return uninstall_routes_for_vni(bgp, vpn); |
90e60aa7 | 2175 | } |
2176 | ||
b16031a2 | 2177 | /* |
2178 | * Function to display "tag" in route as a VNI. | |
2179 | */ | |
d62a17ae | 2180 | char *bgp_evpn_label2str(mpls_label_t *label, char *buf, int len) |
b16031a2 | 2181 | { |
d62a17ae | 2182 | vni_t vni; |
b16031a2 | 2183 | |
d62a17ae | 2184 | vni = label2vni(label); |
2185 | snprintf(buf, len, "%u", vni); | |
2186 | return buf; | |
b16031a2 | 2187 | } |
2188 | ||
9c92b5f7 MK |
2189 | /* |
2190 | * Function to convert evpn route to json format. | |
2191 | * NOTE: We don't use prefix2str as the output here is a bit different. | |
2192 | */ | |
57f7feb6 | 2193 | void bgp_evpn_route2json(struct prefix_evpn *p, json_object *json) |
9c92b5f7 | 2194 | { |
b682f6de | 2195 | char buf1[ETHER_ADDR_STRLEN]; |
2196 | char buf2[PREFIX2STR_BUFFER]; | |
9c92b5f7 | 2197 | |
b682f6de | 2198 | if (!json) |
2199 | return; | |
9c92b5f7 | 2200 | |
dff8f48d | 2201 | if (p->prefix.route_type == BGP_EVPN_IMET_ROUTE) { |
b682f6de | 2202 | json_object_int_add(json, "routeType", p->prefix.route_type); |
2203 | json_object_int_add(json, "ethTag", 0); | |
57f7feb6 MK |
2204 | json_object_int_add(json, "ipLen", |
2205 | IS_EVPN_PREFIX_IPADDR_V4(p) | |
2206 | ? IPV4_MAX_BITLEN | |
2207 | : IPV6_MAX_BITLEN); | |
b682f6de | 2208 | json_object_string_add(json, "ip", |
57f7feb6 MK |
2209 | inet_ntoa(p->prefix.ip.ipaddr_v4)); |
2210 | } else if (p->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) { | |
dff8f48d | 2211 | if (IS_EVPN_PREFIX_IPADDR_NONE(p)) { |
57f7feb6 MK |
2212 | json_object_int_add(json, "routeType", |
2213 | p->prefix.route_type); | |
2214 | json_object_int_add( | |
2215 | json, "esi", | |
2216 | 0); /* TODO: we don't support esi yet */ | |
2217 | json_object_int_add(json, "ethTag", 0); | |
2218 | json_object_int_add(json, "macLen", 8 * ETH_ALEN); | |
2219 | json_object_string_add(json, "mac", | |
2220 | prefix_mac2str(&p->prefix.mac, | |
2221 | buf1, | |
2222 | sizeof(buf1))); | |
dff8f48d MK |
2223 | } else { |
2224 | u_char family; | |
2225 | ||
57f7feb6 MK |
2226 | family = IS_EVPN_PREFIX_IPADDR_V4(p) ? AF_INET |
2227 | : AF_INET6; | |
dff8f48d | 2228 | |
b682f6de | 2229 | json_object_int_add(json, "routeType", |
57f7feb6 MK |
2230 | p->prefix.route_type); |
2231 | json_object_int_add( | |
2232 | json, "esi", | |
2233 | 0); /* TODO: we don't support esi yet */ | |
b682f6de | 2234 | json_object_int_add(json, "ethTag", 0); |
57f7feb6 | 2235 | json_object_int_add(json, "macLen", 8 * ETH_ALEN); |
b682f6de | 2236 | json_object_string_add(json, "mac", |
57f7feb6 MK |
2237 | prefix_mac2str(&p->prefix.mac, |
2238 | buf1, | |
2239 | sizeof(buf1))); | |
b682f6de | 2240 | json_object_int_add(json, "ipLen", |
57f7feb6 MK |
2241 | IS_EVPN_PREFIX_IPADDR_V4(p) |
2242 | ? IPV4_MAX_BITLEN | |
2243 | : IPV6_MAX_BITLEN); | |
2244 | json_object_string_add( | |
2245 | json, "ip", | |
2246 | inet_ntop(family, &p->prefix.ip.ip.addr, buf2, | |
2247 | PREFIX2STR_BUFFER)); | |
dff8f48d MK |
2248 | } |
2249 | } else { | |
2250 | /* Currently, this is to cater to other AF_ETHERNET code. */ | |
2251 | } | |
9c92b5f7 MK |
2252 | } |
2253 | ||
520d5d76 | 2254 | /* |
2255 | * Function to convert evpn route to string. | |
2256 | * NOTE: We don't use prefix2str as the output here is a bit different. | |
2257 | */ | |
d62a17ae | 2258 | char *bgp_evpn_route2str(struct prefix_evpn *p, char *buf, int len) |
2259 | { | |
2260 | char buf1[ETHER_ADDR_STRLEN]; | |
2261 | char buf2[PREFIX2STR_BUFFER]; | |
2262 | ||
2263 | if (p->prefix.route_type == BGP_EVPN_IMET_ROUTE) { | |
2264 | snprintf(buf, len, "[%d]:[0]:[%d]:[%s]", p->prefix.route_type, | |
2265 | IS_EVPN_PREFIX_IPADDR_V4(p) ? IPV4_MAX_BITLEN | |
2266 | : IPV6_MAX_BITLEN, | |
2267 | inet_ntoa(p->prefix.ip.ipaddr_v4)); | |
2268 | } else if (p->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) { | |
2269 | if (IS_EVPN_PREFIX_IPADDR_NONE(p)) | |
2270 | snprintf(buf, len, "[%d]:[0]:[0]:[%d]:[%s]", | |
28328ea9 | 2271 | p->prefix.route_type, 8 * ETH_ALEN, |
d62a17ae | 2272 | prefix_mac2str(&p->prefix.mac, buf1, |
2273 | sizeof(buf1))); | |
2274 | else { | |
2275 | u_char family; | |
2276 | ||
2277 | family = IS_EVPN_PREFIX_IPADDR_V4(p) ? AF_INET | |
2278 | : AF_INET6; | |
2279 | snprintf(buf, len, "[%d]:[0]:[0]:[%d]:[%s]:[%d]:[%s]", | |
28328ea9 | 2280 | p->prefix.route_type, 8 * ETH_ALEN, |
d62a17ae | 2281 | prefix_mac2str(&p->prefix.mac, buf1, |
2282 | sizeof(buf1)), | |
2283 | family == AF_INET ? IPV4_MAX_BITLEN | |
2284 | : IPV6_MAX_BITLEN, | |
2285 | inet_ntop(family, &p->prefix.ip.ip.addr, buf2, | |
2286 | PREFIX2STR_BUFFER)); | |
2287 | } | |
2288 | } else { | |
b03b8898 | 2289 | /* For EVPN route types not supported yet. */ |
f9aa3e55 QY |
2290 | snprintf(buf, len, "(unsupported route type %d)", |
2291 | p->prefix.route_type); | |
d62a17ae | 2292 | } |
2293 | ||
2294 | return (buf); | |
520d5d76 | 2295 | } |
2296 | ||
128ea8ab | 2297 | /* |
2298 | * Encode EVPN prefix in Update (MP_REACH) | |
2299 | */ | |
d62a17ae | 2300 | void bgp_evpn_encode_prefix(struct stream *s, struct prefix *p, |
2301 | struct prefix_rd *prd, mpls_label_t *label, | |
2302 | struct attr *attr, int addpath_encode, | |
2303 | u_int32_t addpath_tx_id) | |
2304 | { | |
2305 | struct prefix_evpn *evp = (struct prefix_evpn *)p; | |
2306 | int ipa_len = 0; | |
2307 | ||
2308 | if (addpath_encode) | |
2309 | stream_putl(s, addpath_tx_id); | |
2310 | ||
2311 | /* Route type */ | |
2312 | stream_putc(s, evp->prefix.route_type); | |
2313 | ||
2314 | switch (evp->prefix.route_type) { | |
2315 | case BGP_EVPN_MAC_IP_ROUTE: | |
2316 | if (IS_EVPN_PREFIX_IPADDR_V4(evp)) | |
2317 | ipa_len = IPV4_MAX_BYTELEN; | |
2318 | else if (IS_EVPN_PREFIX_IPADDR_V6(evp)) | |
2319 | ipa_len = IPV6_MAX_BYTELEN; | |
2320 | stream_putc(s, 33 + ipa_len); // 1 VNI | |
2321 | stream_put(s, prd->val, 8); /* RD */ | |
2322 | stream_put(s, 0, 10); /* ESI */ | |
2323 | stream_putl(s, 0); /* Ethernet Tag ID */ | |
28328ea9 | 2324 | stream_putc(s, 8 * ETH_ALEN); /* Mac Addr Len - bits */ |
d62a17ae | 2325 | stream_put(s, evp->prefix.mac.octet, 6); /* Mac Addr */ |
2326 | stream_putc(s, 8 * ipa_len); /* IP address Length */ | |
2327 | if (ipa_len) | |
2328 | stream_put(s, &evp->prefix.ip.ip.addr, | |
2329 | ipa_len); /* IP */ | |
2330 | stream_put(s, label, | |
2331 | BGP_LABEL_BYTES); /* VNI is contained in 'tag' */ | |
2332 | break; | |
2333 | ||
2334 | case BGP_EVPN_IMET_ROUTE: | |
2335 | stream_putc(s, 17); // TODO: length - assumes IPv4 address | |
2336 | stream_put(s, prd->val, 8); /* RD */ | |
2337 | stream_putl(s, 0); /* Ethernet Tag ID */ | |
2338 | stream_putc(s, IPV4_MAX_BITLEN); /* IP address Length - bits */ | |
2339 | /* Originating Router's IP Addr */ | |
2340 | stream_put_in_addr(s, &evp->prefix.ip.ipaddr_v4); | |
2341 | break; | |
2342 | ||
2343 | case BGP_EVPN_IP_PREFIX_ROUTE: | |
2344 | /* TODO: AddPath support. */ | |
2345 | evpn_mpattr_encode_type5(s, p, prd, label, attr); | |
2346 | break; | |
2347 | ||
2348 | default: | |
2349 | break; | |
2350 | } | |
2351 | } | |
2352 | ||
2353 | int bgp_nlri_parse_evpn(struct peer *peer, struct attr *attr, | |
2354 | struct bgp_nlri *packet, int withdraw) | |
2355 | { | |
2356 | u_char *pnt; | |
2357 | u_char *lim; | |
2358 | afi_t afi; | |
2359 | safi_t safi; | |
2360 | u_int32_t addpath_id; | |
2361 | int addpath_encoded; | |
2362 | int psize = 0; | |
2363 | u_char rtype; | |
2364 | u_char rlen; | |
2365 | struct prefix p; | |
2366 | ||
2367 | /* Check peer status. */ | |
2368 | if (peer->status != Established) { | |
2369 | zlog_err("%u:%s - EVPN update received in state %d", | |
2370 | peer->bgp->vrf_id, peer->host, peer->status); | |
2371 | return -1; | |
2372 | } | |
2373 | ||
2374 | /* Start processing the NLRI - there may be multiple in the MP_REACH */ | |
2375 | pnt = packet->nlri; | |
2376 | lim = pnt + packet->length; | |
2377 | afi = packet->afi; | |
2378 | safi = packet->safi; | |
2379 | addpath_id = 0; | |
2380 | ||
2381 | addpath_encoded = | |
2382 | (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ADDPATH_AF_RX_ADV) | |
2383 | && CHECK_FLAG(peer->af_cap[afi][safi], | |
2384 | PEER_CAP_ADDPATH_AF_TX_RCV)); | |
2385 | ||
2386 | for (; pnt < lim; pnt += psize) { | |
2387 | /* Clear prefix structure. */ | |
2388 | memset(&p, 0, sizeof(struct prefix)); | |
2389 | ||
2390 | /* Deal with path-id if AddPath is supported. */ | |
2391 | if (addpath_encoded) { | |
2392 | /* When packet overflow occurs return immediately. */ | |
2393 | if (pnt + BGP_ADDPATH_ID_LEN > lim) | |
2394 | return -1; | |
2395 | ||
2396 | addpath_id = ntohl(*((uint32_t *)pnt)); | |
2397 | pnt += BGP_ADDPATH_ID_LEN; | |
2398 | } | |
2399 | ||
2400 | /* All EVPN NLRI types start with type and length. */ | |
2401 | if (pnt + 2 > lim) | |
2402 | return -1; | |
2403 | ||
2404 | rtype = *pnt++; | |
2405 | psize = rlen = *pnt++; | |
2406 | ||
2407 | /* When packet overflow occur return immediately. */ | |
2408 | if (pnt + psize > lim) | |
2409 | return -1; | |
2410 | ||
2411 | switch (rtype) { | |
2412 | case BGP_EVPN_MAC_IP_ROUTE: | |
2413 | if (process_type2_route(peer, afi, safi, | |
2414 | withdraw ? NULL : attr, pnt, | |
2415 | psize, addpath_id)) { | |
2416 | zlog_err( | |
2417 | "%u:%s - Error in processing EVPN type-2 NLRI size %d", | |
2418 | peer->bgp->vrf_id, peer->host, psize); | |
2419 | return -1; | |
2420 | } | |
2421 | break; | |
2422 | ||
2423 | case BGP_EVPN_IMET_ROUTE: | |
2424 | if (process_type3_route(peer, afi, safi, | |
2425 | withdraw ? NULL : attr, pnt, | |
2426 | psize, addpath_id)) { | |
2427 | zlog_err( | |
2428 | "%u:%s - Error in processing EVPN type-3 NLRI size %d", | |
2429 | peer->bgp->vrf_id, peer->host, psize); | |
2430 | return -1; | |
2431 | } | |
2432 | break; | |
2433 | ||
2434 | case BGP_EVPN_IP_PREFIX_ROUTE: | |
2435 | if (process_type5_route(peer, afi, safi, attr, pnt, | |
2436 | psize, addpath_id, withdraw)) { | |
2437 | zlog_err( | |
2438 | "%u:%s - Error in processing EVPN type-5 NLRI size %d", | |
2439 | peer->bgp->vrf_id, peer->host, psize); | |
2440 | return -1; | |
2441 | } | |
2442 | break; | |
2443 | ||
2444 | default: | |
2445 | break; | |
2446 | } | |
2447 | } | |
2448 | ||
2449 | /* Packet length consistency check. */ | |
2450 | if (pnt != lim) | |
2451 | return -1; | |
2452 | ||
2453 | return 0; | |
128ea8ab | 2454 | } |
2455 | ||
2456 | ||
2457 | /* | |
2458 | * Map the RTs (configured or automatically derived) of a VNI to the VNI. | |
2459 | * The mapping will be used during route processing. | |
2460 | */ | |
d62a17ae | 2461 | void bgp_evpn_map_vni_to_its_rts(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 2462 | { |
d62a17ae | 2463 | int i; |
2464 | struct ecommunity_val *eval; | |
2465 | struct listnode *node, *nnode; | |
2466 | struct ecommunity *ecom; | |
128ea8ab | 2467 | |
d62a17ae | 2468 | for (ALL_LIST_ELEMENTS(vpn->import_rtl, node, nnode, ecom)) { |
2469 | for (i = 0; i < ecom->size; i++) { | |
2470 | eval = (struct ecommunity_val *)(ecom->val | |
2471 | + (i | |
2472 | * ECOMMUNITY_SIZE)); | |
2473 | map_vni_to_rt(bgp, vpn, eval); | |
2474 | } | |
2475 | } | |
128ea8ab | 2476 | } |
2477 | ||
2478 | /* | |
2479 | * Unmap the RTs (configured or automatically derived) of a VNI from the VNI. | |
2480 | */ | |
d62a17ae | 2481 | void bgp_evpn_unmap_vni_from_its_rts(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 2482 | { |
d62a17ae | 2483 | int i; |
2484 | struct ecommunity_val *eval; | |
2485 | struct listnode *node, *nnode; | |
2486 | struct ecommunity *ecom; | |
128ea8ab | 2487 | |
d62a17ae | 2488 | for (ALL_LIST_ELEMENTS(vpn->import_rtl, node, nnode, ecom)) { |
2489 | for (i = 0; i < ecom->size; i++) { | |
2490 | struct irt_node *irt; | |
2491 | struct ecommunity_val eval_tmp; | |
128ea8ab | 2492 | |
d62a17ae | 2493 | eval = (struct ecommunity_val *)(ecom->val |
2494 | + (i | |
2495 | * ECOMMUNITY_SIZE)); | |
2496 | /* If using "automatic" RT, we only care about the | |
2497 | * local-admin sub-field. | |
2498 | * This is to facilitate using VNI as the RT for EBGP | |
2499 | * peering too. | |
2500 | */ | |
2501 | memcpy(&eval_tmp, eval, ECOMMUNITY_SIZE); | |
2502 | if (!is_import_rt_configured(vpn)) | |
2503 | mask_ecom_global_admin(&eval_tmp, eval); | |
128ea8ab | 2504 | |
d62a17ae | 2505 | irt = lookup_import_rt(bgp, &eval_tmp); |
2506 | if (irt) | |
2507 | unmap_vni_from_rt(bgp, vpn, irt); | |
2508 | } | |
2509 | } | |
128ea8ab | 2510 | } |
2511 | ||
2512 | /* | |
2513 | * Derive Import RT automatically for VNI and map VNI to RT. | |
2514 | * The mapping will be used during route processing. | |
2515 | */ | |
d62a17ae | 2516 | void bgp_evpn_derive_auto_rt_import(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 2517 | { |
d62a17ae | 2518 | form_auto_rt(bgp, vpn, vpn->import_rtl); |
2519 | UNSET_FLAG(vpn->flags, VNI_FLAG_IMPRT_CFGD); | |
128ea8ab | 2520 | |
d62a17ae | 2521 | /* Map RT to VNI */ |
2522 | bgp_evpn_map_vni_to_its_rts(bgp, vpn); | |
128ea8ab | 2523 | } |
2524 | ||
2525 | /* | |
2526 | * Derive Export RT automatically for VNI. | |
2527 | */ | |
d62a17ae | 2528 | void bgp_evpn_derive_auto_rt_export(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 2529 | { |
d62a17ae | 2530 | form_auto_rt(bgp, vpn, vpn->export_rtl); |
2531 | UNSET_FLAG(vpn->flags, VNI_FLAG_EXPRT_CFGD); | |
128ea8ab | 2532 | } |
2533 | ||
2534 | /* | |
2535 | * Derive RD automatically for VNI using passed information - it | |
2536 | * is of the form RouterId:unique-id-for-vni. | |
2537 | */ | |
d62a17ae | 2538 | void bgp_evpn_derive_auto_rd(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 2539 | { |
d62a17ae | 2540 | char buf[100]; |
128ea8ab | 2541 | |
d62a17ae | 2542 | vpn->prd.family = AF_UNSPEC; |
2543 | vpn->prd.prefixlen = 64; | |
2544 | sprintf(buf, "%s:%hu", inet_ntoa(bgp->router_id), vpn->rd_id); | |
2545 | str2prefix_rd(buf, &vpn->prd); | |
2546 | UNSET_FLAG(vpn->flags, VNI_FLAG_RD_CFGD); | |
128ea8ab | 2547 | } |
2548 | ||
2549 | /* | |
2550 | * Lookup VNI. | |
2551 | */ | |
d62a17ae | 2552 | struct bgpevpn *bgp_evpn_lookup_vni(struct bgp *bgp, vni_t vni) |
128ea8ab | 2553 | { |
d62a17ae | 2554 | struct bgpevpn *vpn; |
2555 | struct bgpevpn tmp; | |
128ea8ab | 2556 | |
d62a17ae | 2557 | memset(&tmp, 0, sizeof(struct bgpevpn)); |
2558 | tmp.vni = vni; | |
2559 | vpn = hash_lookup(bgp->vnihash, &tmp); | |
2560 | return vpn; | |
128ea8ab | 2561 | } |
2562 | ||
2563 | /* | |
2564 | * Create a new vpn - invoked upon configuration or zebra notification. | |
2565 | */ | |
d62a17ae | 2566 | struct bgpevpn *bgp_evpn_new(struct bgp *bgp, vni_t vni, |
2567 | struct in_addr originator_ip) | |
128ea8ab | 2568 | { |
d62a17ae | 2569 | struct bgpevpn *vpn; |
128ea8ab | 2570 | |
d62a17ae | 2571 | if (!bgp) |
2572 | return NULL; | |
128ea8ab | 2573 | |
d62a17ae | 2574 | vpn = XCALLOC(MTYPE_BGP_EVPN, sizeof(struct bgpevpn)); |
2575 | if (!vpn) | |
2576 | return NULL; | |
128ea8ab | 2577 | |
d62a17ae | 2578 | /* Set values - RD and RT set to defaults. */ |
2579 | vpn->vni = vni; | |
2580 | vpn->originator_ip = originator_ip; | |
128ea8ab | 2581 | |
d62a17ae | 2582 | /* Initialize route-target import and export lists */ |
2583 | vpn->import_rtl = list_new(); | |
2584 | vpn->import_rtl->cmp = (int (*)(void *, void *))evpn_route_target_cmp; | |
2585 | vpn->export_rtl = list_new(); | |
2586 | vpn->export_rtl->cmp = (int (*)(void *, void *))evpn_route_target_cmp; | |
2587 | bf_assign_index(bgp->rd_idspace, vpn->rd_id); | |
2588 | derive_rd_rt_for_vni(bgp, vpn); | |
128ea8ab | 2589 | |
d62a17ae | 2590 | /* Initialize EVPN route table. */ |
2591 | vpn->route_table = bgp_table_init(AFI_L2VPN, SAFI_EVPN); | |
128ea8ab | 2592 | |
d62a17ae | 2593 | /* Add to hash */ |
2594 | if (!hash_get(bgp->vnihash, vpn, hash_alloc_intern)) { | |
2595 | XFREE(MTYPE_BGP_EVPN, vpn); | |
2596 | return NULL; | |
2597 | } | |
2598 | QOBJ_REG(vpn, bgpevpn); | |
2599 | return vpn; | |
128ea8ab | 2600 | } |
2601 | ||
2602 | /* | |
2603 | * Free a given VPN - called in multiple scenarios such as zebra | |
2604 | * notification, configuration being deleted, advertise-all-vni disabled etc. | |
2605 | * This just frees appropriate memory, caller should have taken other | |
2606 | * needed actions. | |
2607 | */ | |
d62a17ae | 2608 | void bgp_evpn_free(struct bgp *bgp, struct bgpevpn *vpn) |
128ea8ab | 2609 | { |
d62a17ae | 2610 | bgp_table_unlock(vpn->route_table); |
2611 | bgp_evpn_unmap_vni_from_its_rts(bgp, vpn); | |
2612 | list_delete(vpn->import_rtl); | |
2613 | list_delete(vpn->export_rtl); | |
2614 | vpn->import_rtl = NULL; | |
2615 | vpn->export_rtl = NULL; | |
2616 | bf_release_index(bgp->rd_idspace, vpn->rd_id); | |
2617 | hash_release(bgp->vnihash, vpn); | |
2618 | QOBJ_UNREG(vpn); | |
2619 | XFREE(MTYPE_BGP_EVPN, vpn); | |
128ea8ab | 2620 | } |
2621 | ||
2622 | /* | |
2623 | * Import route into matching VNI(s). | |
2624 | */ | |
d62a17ae | 2625 | int bgp_evpn_import_route(struct bgp *bgp, afi_t afi, safi_t safi, |
2626 | struct prefix *p, struct bgp_info *ri) | |
128ea8ab | 2627 | { |
d62a17ae | 2628 | return install_uninstall_evpn_route(bgp, afi, safi, p, ri, 1); |
128ea8ab | 2629 | } |
2630 | ||
2631 | /* | |
2632 | * Unimport route from matching VNI(s). | |
2633 | */ | |
d62a17ae | 2634 | int bgp_evpn_unimport_route(struct bgp *bgp, afi_t afi, safi_t safi, |
2635 | struct prefix *p, struct bgp_info *ri) | |
128ea8ab | 2636 | { |
d62a17ae | 2637 | return install_uninstall_evpn_route(bgp, afi, safi, p, ri, 0); |
128ea8ab | 2638 | } |
2639 | ||
db0e1937 MK |
2640 | /* filter routes which have martian next hops */ |
2641 | int bgp_filter_evpn_routes_upon_martian_nh_change(struct bgp *bgp) | |
2642 | { | |
0291c246 MK |
2643 | afi_t afi; |
2644 | safi_t safi; | |
2645 | struct bgp_node *rd_rn, *rn; | |
2646 | struct bgp_table *table; | |
2647 | struct bgp_info *ri; | |
db0e1937 MK |
2648 | |
2649 | afi = AFI_L2VPN; | |
2650 | safi = SAFI_EVPN; | |
2651 | ||
2652 | /* Walk entire global routing table and evaluate routes which could be | |
2653 | * imported into this VPN. Note that we cannot just look at the routes | |
2654 | * for the VNI's RD - | |
2655 | * remote routes applicable for this VNI could have any RD. | |
2656 | */ | |
2657 | /* EVPN routes are a 2-level table. */ | |
2658 | for (rd_rn = bgp_table_top(bgp->rib[afi][safi]); rd_rn; | |
2659 | rd_rn = bgp_route_next(rd_rn)) { | |
2660 | table = (struct bgp_table *)(rd_rn->info); | |
2661 | if (!table) | |
2662 | continue; | |
2663 | ||
2664 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) { | |
2665 | ||
2666 | for (ri = rn->info; ri; ri = ri->next) { | |
2667 | ||
2668 | /* Consider "valid" remote routes applicable for | |
2669 | * this VNI. */ | |
2670 | if (!(ri->type == ZEBRA_ROUTE_BGP | |
2671 | && ri->sub_type == BGP_ROUTE_NORMAL)) | |
2672 | continue; | |
2673 | ||
60466a63 | 2674 | if (bgp_nexthop_self(bgp, ri->attr->nexthop)) { |
db0e1937 MK |
2675 | |
2676 | char attr_str[BUFSIZ]; | |
2677 | char pbuf[PREFIX_STRLEN]; | |
2678 | ||
2679 | bgp_dump_attr(ri->attr, attr_str, | |
2680 | BUFSIZ); | |
2681 | ||
2682 | if (bgp_debug_update(ri->peer, &rn->p, | |
2683 | NULL, 1)) | |
2684 | zlog_debug( | |
b682f6de | 2685 | "%u: prefix %s with attr %s - DENIED due to martian or self nexthop", |
db0e1937 MK |
2686 | bgp->vrf_id, |
2687 | prefix2str( | |
60466a63 | 2688 | &rn->p, pbuf, |
db0e1937 MK |
2689 | sizeof(pbuf)), |
2690 | attr_str); | |
2691 | ||
2692 | bgp_evpn_unimport_route(bgp, afi, safi, | |
2693 | &rn->p, ri); | |
2694 | ||
60466a63 QY |
2695 | bgp_rib_remove(rn, ri, ri->peer, afi, |
2696 | safi); | |
db0e1937 | 2697 | } |
db0e1937 MK |
2698 | } |
2699 | } | |
2700 | } | |
2701 | ||
2702 | return 0; | |
2703 | } | |
2704 | ||
128ea8ab | 2705 | /* |
2706 | * Handle del of a local MACIP. | |
2707 | */ | |
d62a17ae | 2708 | int bgp_evpn_local_macip_del(struct bgp *bgp, vni_t vni, struct ethaddr *mac, |
2709 | struct ipaddr *ip) | |
128ea8ab | 2710 | { |
d62a17ae | 2711 | struct bgpevpn *vpn; |
2712 | struct prefix_evpn p; | |
128ea8ab | 2713 | |
d62a17ae | 2714 | if (!bgp->vnihash) { |
2715 | zlog_err("%u: VNI hash not created", bgp->vrf_id); | |
2716 | return -1; | |
2717 | } | |
128ea8ab | 2718 | |
d62a17ae | 2719 | /* Lookup VNI hash - should exist. */ |
2720 | vpn = bgp_evpn_lookup_vni(bgp, vni); | |
2721 | if (!vpn || !is_vni_live(vpn)) { | |
2722 | zlog_warn("%u: VNI hash entry for VNI %u %s at MACIP DEL", | |
2723 | bgp->vrf_id, vni, vpn ? "not live" : "not found"); | |
2724 | return -1; | |
2725 | } | |
128ea8ab | 2726 | |
d62a17ae | 2727 | /* Remove EVPN type-2 route and schedule for processing. */ |
2728 | build_evpn_type2_prefix(&p, mac, ip); | |
2729 | delete_evpn_route(bgp, vpn, &p); | |
128ea8ab | 2730 | |
d62a17ae | 2731 | return 0; |
128ea8ab | 2732 | } |
2733 | ||
2734 | /* | |
2735 | * Handle add of a local MACIP. | |
2736 | */ | |
d62a17ae | 2737 | int bgp_evpn_local_macip_add(struct bgp *bgp, vni_t vni, struct ethaddr *mac, |
1a98c087 | 2738 | struct ipaddr *ip, u_char flags) |
128ea8ab | 2739 | { |
d62a17ae | 2740 | struct bgpevpn *vpn; |
2741 | struct prefix_evpn p; | |
128ea8ab | 2742 | |
d62a17ae | 2743 | if (!bgp->vnihash) { |
2744 | zlog_err("%u: VNI hash not created", bgp->vrf_id); | |
2745 | return -1; | |
2746 | } | |
128ea8ab | 2747 | |
d62a17ae | 2748 | /* Lookup VNI hash - should exist. */ |
2749 | vpn = bgp_evpn_lookup_vni(bgp, vni); | |
2750 | if (!vpn || !is_vni_live(vpn)) { | |
2751 | zlog_warn("%u: VNI hash entry for VNI %u %s at MACIP ADD", | |
2752 | bgp->vrf_id, vni, vpn ? "not live" : "not found"); | |
2753 | return -1; | |
2754 | } | |
128ea8ab | 2755 | |
d62a17ae | 2756 | /* Create EVPN type-2 route and schedule for processing. */ |
2757 | build_evpn_type2_prefix(&p, mac, ip); | |
1a98c087 | 2758 | if (update_evpn_route(bgp, vpn, &p, flags)) { |
d62a17ae | 2759 | char buf[ETHER_ADDR_STRLEN]; |
2760 | char buf2[INET6_ADDRSTRLEN]; | |
128ea8ab | 2761 | |
d62a17ae | 2762 | zlog_err( |
b34fd35d | 2763 | "%u:Failed to create Type-2 route, VNI %u %s MAC %s IP %s", |
1a98c087 | 2764 | bgp->vrf_id, vpn->vni, |
b34fd35d | 2765 | CHECK_FLAG(flags, ZEBRA_MAC_TYPE_STICKY) ? "sticky gateway" |
1a98c087 | 2766 | : "", |
d62a17ae | 2767 | prefix_mac2str(mac, buf, sizeof(buf)), |
2768 | ipaddr2str(ip, buf2, sizeof(buf2))); | |
2769 | return -1; | |
2770 | } | |
128ea8ab | 2771 | |
d62a17ae | 2772 | return 0; |
128ea8ab | 2773 | } |
2774 | ||
2775 | /* | |
2776 | * Handle del of a local VNI. | |
2777 | */ | |
d62a17ae | 2778 | int bgp_evpn_local_vni_del(struct bgp *bgp, vni_t vni) |
128ea8ab | 2779 | { |
d62a17ae | 2780 | struct bgpevpn *vpn; |
128ea8ab | 2781 | |
d62a17ae | 2782 | if (!bgp->vnihash) { |
2783 | zlog_err("%u: VNI hash not created", bgp->vrf_id); | |
2784 | return -1; | |
2785 | } | |
128ea8ab | 2786 | |
d62a17ae | 2787 | /* Locate VNI hash */ |
2788 | vpn = bgp_evpn_lookup_vni(bgp, vni); | |
2789 | if (!vpn) { | |
2790 | zlog_warn("%u: VNI hash entry for VNI %u not found at DEL", | |
2791 | bgp->vrf_id, vni); | |
2792 | return 0; | |
2793 | } | |
128ea8ab | 2794 | |
d62a17ae | 2795 | /* Remove all local EVPN routes and schedule for processing (to |
2796 | * withdraw from peers). | |
2797 | */ | |
2798 | delete_routes_for_vni(bgp, vpn); | |
128ea8ab | 2799 | |
db0e1937 MK |
2800 | /* |
2801 | * tunnel is no longer active, del tunnel ip address from tip_hash | |
2802 | */ | |
2803 | bgp_tip_del(bgp, &vpn->originator_ip); | |
2804 | ||
d62a17ae | 2805 | /* Clear "live" flag and see if hash needs to be freed. */ |
2806 | UNSET_FLAG(vpn->flags, VNI_FLAG_LIVE); | |
2807 | if (!is_vni_configured(vpn)) | |
2808 | bgp_evpn_free(bgp, vpn); | |
128ea8ab | 2809 | |
d62a17ae | 2810 | return 0; |
128ea8ab | 2811 | } |
2812 | ||
2813 | /* | |
2814 | * Handle add (or update) of a local VNI. The only VNI change we care | |
2815 | * about is change to local-tunnel-ip. | |
2816 | */ | |
d62a17ae | 2817 | int bgp_evpn_local_vni_add(struct bgp *bgp, vni_t vni, |
2818 | struct in_addr originator_ip) | |
2819 | { | |
2820 | struct bgpevpn *vpn; | |
2821 | struct prefix_evpn p; | |
2822 | ||
2823 | if (!bgp->vnihash) { | |
2824 | zlog_err("%u: VNI hash not created", bgp->vrf_id); | |
2825 | return -1; | |
2826 | } | |
2827 | ||
2828 | /* Lookup VNI. If present and no change, exit. */ | |
2829 | vpn = bgp_evpn_lookup_vni(bgp, vni); | |
ddd16ed5 | 2830 | if (vpn) { |
2f1ac16a MK |
2831 | if (is_vni_live(vpn) |
2832 | && IPV4_ADDR_SAME(&vpn->originator_ip, &originator_ip)) | |
d62a17ae | 2833 | /* Probably some other param has changed that we don't |
2834 | * care about. */ | |
2835 | return 0; | |
2836 | ||
2837 | /* Local tunnel endpoint IP address has changed */ | |
ddd16ed5 | 2838 | handle_tunnel_ip_change(bgp, vpn, originator_ip); |
d62a17ae | 2839 | } |
2840 | ||
2841 | /* Create or update as appropriate. */ | |
2842 | if (!vpn) { | |
2843 | vpn = bgp_evpn_new(bgp, vni, originator_ip); | |
2844 | if (!vpn) { | |
2845 | zlog_err( | |
2846 | "%u: Failed to allocate VNI entry for VNI %u - at Add", | |
2847 | bgp->vrf_id, vni); | |
2848 | return -1; | |
2849 | } | |
2850 | } | |
2851 | ||
db0e1937 | 2852 | /* if the VNI is live already, there is nothing more to do */ |
ddd16ed5 MK |
2853 | if (is_vni_live(vpn)) |
2854 | return 0; | |
2855 | ||
d62a17ae | 2856 | /* Mark as "live" */ |
2857 | SET_FLAG(vpn->flags, VNI_FLAG_LIVE); | |
2858 | ||
db0e1937 MK |
2859 | /* tunnel is now active, add tunnel-ip to db */ |
2860 | bgp_tip_add(bgp, &originator_ip); | |
2861 | ||
2862 | /* filter routes as nexthop database has changed */ | |
2863 | bgp_filter_evpn_routes_upon_martian_nh_change(bgp); | |
2864 | ||
d62a17ae | 2865 | /* Create EVPN type-3 route and schedule for processing. */ |
2866 | build_evpn_type3_prefix(&p, vpn->originator_ip); | |
2867 | if (update_evpn_route(bgp, vpn, &p, 0)) { | |
2868 | zlog_err("%u: Type3 route creation failure for VNI %u", | |
2869 | bgp->vrf_id, vni); | |
2870 | return -1; | |
2871 | } | |
2872 | ||
2873 | /* If we have learnt and retained remote routes (VTEPs, MACs) for this | |
2874 | * VNI, | |
2875 | * install them. | |
2876 | */ | |
2877 | install_routes_for_vni(bgp, vpn); | |
2878 | ||
d7d97010 MK |
2879 | /* If we are advertising gateway mac-ip |
2880 | It needs to be conveyed again to zebra */ | |
2881 | bgp_zebra_advertise_gw_macip(bgp, vpn->advertise_gw_macip, vpn->vni); | |
2882 | ||
d62a17ae | 2883 | return 0; |
b18825eb | 2884 | } |
14c1a7bf | 2885 | |
7724c0a1 | 2886 | /* |
2887 | * Cleanup EVPN information on disable - Need to delete and withdraw | |
2888 | * EVPN routes from peers. | |
2889 | */ | |
d62a17ae | 2890 | void bgp_evpn_cleanup_on_disable(struct bgp *bgp) |
7724c0a1 | 2891 | { |
9d303b37 DL |
2892 | hash_iterate(bgp->vnihash, (void (*)(struct hash_backet *, |
2893 | void *))cleanup_vni_on_disable, | |
2894 | bgp); | |
7724c0a1 | 2895 | } |
2896 | ||
14c1a7bf | 2897 | /* |
2898 | * Cleanup EVPN information - invoked at the time of bgpd exit or when the | |
2899 | * BGP instance (default) is being freed. | |
2900 | */ | |
d62a17ae | 2901 | void bgp_evpn_cleanup(struct bgp *bgp) |
14c1a7bf | 2902 | { |
d62a17ae | 2903 | if (bgp->vnihash) |
9d303b37 DL |
2904 | hash_iterate(bgp->vnihash, (void (*)(struct hash_backet *, |
2905 | void *))free_vni_entry, | |
2906 | bgp); | |
d62a17ae | 2907 | if (bgp->import_rt_hash) |
2908 | hash_free(bgp->import_rt_hash); | |
2909 | bgp->import_rt_hash = NULL; | |
2910 | if (bgp->vnihash) | |
2911 | hash_free(bgp->vnihash); | |
2912 | bgp->vnihash = NULL; | |
2913 | bf_free(bgp->rd_idspace); | |
14c1a7bf | 2914 | } |
2915 | ||
2916 | /* | |
2917 | * Initialization for EVPN | |
2918 | * Create | |
2919 | * VNI hash table | |
2920 | * hash for RT to VNI | |
2921 | * unique rd id space for auto derivation of RD for VNIs | |
2922 | */ | |
d62a17ae | 2923 | void bgp_evpn_init(struct bgp *bgp) |
2924 | { | |
2925 | bgp->vnihash = | |
2926 | hash_create(vni_hash_key_make, vni_hash_cmp, "BGP VNI Hash"); | |
2927 | bgp->import_rt_hash = | |
2928 | hash_create(import_rt_hash_key_make, import_rt_hash_cmp, | |
2929 | "BGP Import RT Hash"); | |
2930 | bf_init(bgp->rd_idspace, UINT16_MAX); | |
2931 | /*assign 0th index in the bitfield, so that we start with id 1*/ | |
2932 | bf_assign_zero_index(bgp->rd_idspace); | |
14c1a7bf | 2933 | } |