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a4168ebc | 1 | /* BGP EVPN internal definitions |
2 | * Copyright (C) 2017 Cumulus Networks, Inc. | |
3 | * | |
4 | * This file is part of FRR. | |
5 | * | |
6 | * FRR is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * FRR is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with FRR; see the file COPYING. If not, write to the Free | |
18 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
19 | * 02111-1307, USA. | |
20 | */ | |
21 | ||
22 | #ifndef _BGP_EVPN_PRIVATE_H | |
23 | #define _BGP_EVPN_PRIVATE_H | |
24 | ||
25 | #include "vxlan.h" | |
26 | #include "zebra.h" | |
27 | ||
28 | #include "bgpd/bgpd.h" | |
29 | #include "bgpd/bgp_ecommunity.h" | |
30 | ||
60466a63 | 31 | #define RT_ADDRSTRLEN 28 |
9c92b5f7 | 32 | |
e9fc2840 | 33 | /* EVPN prefix lengths. This reprsent the sizeof struct prefix_evpn */ |
a4168ebc | 34 | #define EVPN_TYPE_2_ROUTE_PREFIXLEN 224 |
35 | #define EVPN_TYPE_3_ROUTE_PREFIXLEN 224 | |
e9fc2840 | 36 | #define EVPN_TYPE_5_ROUTE_PREFIXLEN 224 |
a4168ebc | 37 | |
38 | /* EVPN route types. */ | |
d62a17ae | 39 | typedef enum { |
40 | BGP_EVPN_AD_ROUTE = 1, /* Ethernet Auto-Discovery (A-D) route */ | |
41 | BGP_EVPN_MAC_IP_ROUTE, /* MAC/IP Advertisement route */ | |
42 | BGP_EVPN_IMET_ROUTE, /* Inclusive Multicast Ethernet Tag route */ | |
43 | BGP_EVPN_ES_ROUTE, /* Ethernet Segment route */ | |
44 | BGP_EVPN_IP_PREFIX_ROUTE, /* IP Prefix route */ | |
a4168ebc | 45 | } bgp_evpn_route_type; |
46 | ||
47 | /* | |
48 | * Hash table of EVIs. Right now, the only type of EVI supported is with | |
49 | * VxLAN encapsulation, hence each EVI corresponds to a L2 VNI. | |
50 | * The VNIs are not "created" through BGP but through some other interface | |
51 | * on the system. This table stores VNIs that BGP comes to know as present | |
52 | * on the system (through interaction with zebra) as well as pre-configured | |
53 | * VNIs (which need to be defined in the system to become "live"). | |
54 | */ | |
d62a17ae | 55 | struct bgpevpn { |
56 | vni_t vni; | |
29c53922 | 57 | vrf_id_t tenant_vrf_id; |
d62a17ae | 58 | u_int32_t flags; |
a4168ebc | 59 | #define VNI_FLAG_CFGD 0x1 /* VNI is user configured */ |
60 | #define VNI_FLAG_LIVE 0x2 /* VNI is "live" */ | |
61 | #define VNI_FLAG_RD_CFGD 0x4 /* RD is user configured. */ | |
62 | #define VNI_FLAG_IMPRT_CFGD 0x8 /* Import RT is user configured */ | |
63 | #define VNI_FLAG_EXPRT_CFGD 0x10 /* Export RT is user configured */ | |
64 | ||
1a98c087 MK |
65 | /* Flag to indicate if we are advertising the g/w mac ip for this VNI*/ |
66 | u_int8_t advertise_gw_macip; | |
67 | ||
31310b25 MK |
68 | /* Flag to indicate if we are advertising subnet for this VNI */ |
69 | u_int8_t advertise_subnet; | |
70 | ||
d62a17ae | 71 | /* Id for deriving the RD automatically for this VNI */ |
72 | u_int16_t rd_id; | |
a4168ebc | 73 | |
d62a17ae | 74 | /* RD for this VNI. */ |
75 | struct prefix_rd prd; | |
a4168ebc | 76 | |
d62a17ae | 77 | /* Route type 3 field */ |
78 | struct in_addr originator_ip; | |
a4168ebc | 79 | |
d62a17ae | 80 | /* Import and Export RTs. */ |
81 | struct list *import_rtl; | |
82 | struct list *export_rtl; | |
a4168ebc | 83 | |
d62a17ae | 84 | /* Route table for EVPN routes for this VNI. */ |
85 | struct bgp_table *route_table; | |
a4168ebc | 86 | |
d62a17ae | 87 | QOBJ_FIELDS |
a4168ebc | 88 | }; |
89 | ||
90 | DECLARE_QOBJ_TYPE(bgpevpn) | |
91 | ||
92 | /* Mapping of Import RT to VNIs. | |
93 | * The Import RTs of all VNIs are maintained in a hash table with each | |
94 | * RT linking to all VNIs that will import routes matching this RT. | |
95 | */ | |
d62a17ae | 96 | struct irt_node { |
97 | /* RT */ | |
98 | struct ecommunity_val rt; | |
a4168ebc | 99 | |
d62a17ae | 100 | /* List of VNIs importing routes matching this RT. */ |
101 | struct list *vnis; | |
a4168ebc | 102 | }; |
103 | ||
10ebe1ab MK |
104 | /* Mapping of Import RT to VRFs. |
105 | * The Import RTs of all VRFss are maintained in a hash table with each | |
106 | * RT linking to all VRFs that will import routes matching this RT. | |
107 | */ | |
108 | struct vrf_irt_node { | |
109 | /* RT */ | |
110 | struct ecommunity_val rt; | |
111 | ||
112 | /* List of VNIs importing routes matching this RT. */ | |
113 | struct list *vrfs; | |
114 | }; | |
115 | ||
116 | ||
128ea8ab | 117 | #define RT_TYPE_IMPORT 1 |
118 | #define RT_TYPE_EXPORT 2 | |
119 | #define RT_TYPE_BOTH 3 | |
120 | ||
676f83b9 | 121 | static inline int is_vrf_rd_configured(struct bgp *bgp_vrf) |
122 | { | |
123 | return (CHECK_FLAG(bgp_vrf->vrf_flags, | |
124 | BGP_VRF_RD_CFGD)); | |
125 | } | |
126 | ||
127 | static inline int bgp_evpn_vrf_rd_matches_existing(struct bgp *bgp_vrf, | |
128 | struct prefix_rd *prd) | |
129 | { | |
130 | return (memcmp(&bgp_vrf->vrf_prd.val, prd->val, ECOMMUNITY_SIZE) == 0); | |
131 | } | |
132 | ||
6d8c58b7 MK |
133 | static inline vni_t bgpevpn_get_l3vni(struct bgpevpn *vpn) |
134 | { | |
135 | struct bgp *bgp_vrf = NULL; | |
136 | ||
137 | bgp_vrf = bgp_lookup_by_vrf_id(vpn->tenant_vrf_id); | |
138 | if (!bgp_vrf) | |
139 | return 0; | |
140 | ||
141 | return bgp_vrf->l3vni; | |
142 | } | |
143 | ||
144 | static inline void bgpevpn_get_rmac(struct bgpevpn *vpn, struct ethaddr *rmac) | |
145 | { | |
146 | struct bgp *bgp_vrf = NULL; | |
147 | ||
148 | memset(rmac, 0, sizeof(struct ethaddr)); | |
149 | bgp_vrf = bgp_lookup_by_vrf_id(vpn->tenant_vrf_id); | |
150 | if (!bgp_vrf) | |
151 | return; | |
152 | memcpy(rmac, &bgp_vrf->rmac, sizeof(struct ethaddr)); | |
153 | } | |
154 | ||
155 | static inline struct list *bgpevpn_get_vrf_export_rtl(struct bgpevpn *vpn) | |
156 | { | |
157 | struct bgp *bgp_vrf = NULL; | |
158 | ||
159 | bgp_vrf = bgp_lookup_by_vrf_id(vpn->tenant_vrf_id); | |
160 | if (!bgp_vrf) | |
161 | return NULL; | |
162 | ||
163 | return bgp_vrf->vrf_export_rtl; | |
164 | } | |
165 | ||
166 | static inline struct list *bgpevpn_get_vrf_import_rtl(struct bgpevpn *vpn) | |
167 | { | |
168 | struct bgp *bgp_vrf = NULL; | |
169 | ||
170 | bgp_vrf = bgp_lookup_by_vrf_id(vpn->tenant_vrf_id); | |
171 | if (!bgp_vrf) | |
172 | return NULL; | |
173 | ||
174 | return bgp_vrf->vrf_import_rtl; | |
175 | } | |
176 | ||
6a8657d0 MK |
177 | static inline void bgpevpn_unlink_from_l3vni(struct bgpevpn *vpn) |
178 | { | |
179 | struct bgp *bgp_vrf = NULL; | |
180 | ||
181 | bgp_vrf = bgp_lookup_by_vrf_id(vpn->tenant_vrf_id); | |
182 | if (!bgp_vrf || !bgp_vrf->l2vnis) | |
183 | return; | |
184 | listnode_delete(bgp_vrf->l2vnis, vpn); | |
185 | } | |
186 | ||
187 | static inline void bgpevpn_link_to_l3vni(struct bgpevpn *vpn) | |
188 | { | |
189 | struct bgp *bgp_vrf = NULL; | |
190 | ||
191 | bgp_vrf = bgp_lookup_by_vrf_id(vpn->tenant_vrf_id); | |
192 | if (!bgp_vrf || !bgp_vrf->l2vnis) | |
193 | return; | |
194 | listnode_add_sort(bgp_vrf->l2vnis, vpn); | |
195 | } | |
196 | ||
d62a17ae | 197 | static inline int is_vni_configured(struct bgpevpn *vpn) |
128ea8ab | 198 | { |
d62a17ae | 199 | return (CHECK_FLAG(vpn->flags, VNI_FLAG_CFGD)); |
128ea8ab | 200 | } |
201 | ||
d62a17ae | 202 | static inline int is_vni_live(struct bgpevpn *vpn) |
128ea8ab | 203 | { |
d62a17ae | 204 | return (CHECK_FLAG(vpn->flags, VNI_FLAG_LIVE)); |
128ea8ab | 205 | } |
206 | ||
d62a17ae | 207 | static inline int is_rd_configured(struct bgpevpn *vpn) |
128ea8ab | 208 | { |
d62a17ae | 209 | return (CHECK_FLAG(vpn->flags, VNI_FLAG_RD_CFGD)); |
128ea8ab | 210 | } |
211 | ||
d62a17ae | 212 | static inline int bgp_evpn_rd_matches_existing(struct bgpevpn *vpn, |
213 | struct prefix_rd *prd) | |
128ea8ab | 214 | { |
d62a17ae | 215 | return (memcmp(&vpn->prd.val, prd->val, ECOMMUNITY_SIZE) == 0); |
128ea8ab | 216 | } |
217 | ||
d62a17ae | 218 | static inline int is_import_rt_configured(struct bgpevpn *vpn) |
128ea8ab | 219 | { |
d62a17ae | 220 | return (CHECK_FLAG(vpn->flags, VNI_FLAG_IMPRT_CFGD)); |
128ea8ab | 221 | } |
222 | ||
d62a17ae | 223 | static inline int is_export_rt_configured(struct bgpevpn *vpn) |
128ea8ab | 224 | { |
d62a17ae | 225 | return (CHECK_FLAG(vpn->flags, VNI_FLAG_EXPRT_CFGD)); |
128ea8ab | 226 | } |
227 | ||
d62a17ae | 228 | static inline int is_vni_param_configured(struct bgpevpn *vpn) |
128ea8ab | 229 | { |
d62a17ae | 230 | return (is_rd_configured(vpn) || is_import_rt_configured(vpn) |
231 | || is_export_rt_configured(vpn)); | |
128ea8ab | 232 | } |
233 | ||
bc59a672 MK |
234 | static inline void encode_rmac_extcomm(struct ecommunity_val *eval, |
235 | struct ethaddr *rmac) | |
236 | { | |
237 | memset(eval, 0, sizeof(*eval)); | |
238 | eval->val[0] = ECOMMUNITY_ENCODE_EVPN; | |
239 | eval->val[1] = ECOMMUNITY_EVPN_SUBTYPE_ROUTERMAC; | |
240 | memcpy(&eval->val[2], rmac, ETH_ALEN); | |
241 | } | |
242 | ||
ead40654 MK |
243 | static inline void encode_default_gw_extcomm(struct ecommunity_val *eval) |
244 | { | |
245 | memset(eval, 0, sizeof(*eval)); | |
246 | eval->val[0] = ECOMMUNITY_ENCODE_OPAQUE; | |
247 | eval->val[1] = ECOMMUNITY_EVPN_SUBTYPE_DEF_GW; | |
248 | } | |
249 | ||
d62a17ae | 250 | static inline void encode_mac_mobility_extcomm(int static_mac, u_int32_t seq, |
251 | struct ecommunity_val *eval) | |
128ea8ab | 252 | { |
d62a17ae | 253 | memset(eval, 0, sizeof(*eval)); |
254 | eval->val[0] = ECOMMUNITY_ENCODE_EVPN; | |
255 | eval->val[1] = ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY; | |
256 | if (static_mac) | |
257 | eval->val[2] = ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY_FLAG_STICKY; | |
258 | eval->val[4] = (seq >> 24) & 0xff; | |
259 | eval->val[5] = (seq >> 16) & 0xff; | |
260 | eval->val[6] = (seq >> 8) & 0xff; | |
261 | eval->val[7] = seq & 0xff; | |
128ea8ab | 262 | } |
263 | ||
90264d64 MK |
264 | static inline void ip_prefix_from_type5_prefix(struct prefix_evpn *evp, |
265 | struct prefix *ip) | |
266 | { | |
267 | memset(ip, 0, sizeof(struct prefix)); | |
268 | if (IS_EVPN_PREFIX_IPADDR_V4(evp)) { | |
269 | ip->family = AF_INET; | |
270 | ip->prefixlen = evp->prefix.ip_prefix_length; | |
271 | memcpy(&(ip->u.prefix4), | |
272 | &(evp->prefix.ip.ip), | |
273 | IPV4_MAX_BYTELEN); | |
274 | } else if (IS_EVPN_PREFIX_IPADDR_V6(evp)) { | |
275 | ip->family = AF_INET6; | |
276 | ip->prefixlen = evp->prefix.ip_prefix_length; | |
277 | memcpy(&(ip->u.prefix6), | |
278 | &(evp->prefix.ip.ip), | |
279 | IPV6_MAX_BYTELEN); | |
280 | } | |
281 | } | |
282 | ||
d3135ba3 | 283 | static inline void ip_prefix_from_type2_prefix(struct prefix_evpn *evp, |
284 | struct prefix *ip) | |
285 | { | |
286 | memset(ip, 0, sizeof(struct prefix)); | |
287 | if (IS_EVPN_PREFIX_IPADDR_V4(evp)) { | |
288 | ip->family = AF_INET; | |
289 | ip->prefixlen = IPV4_MAX_BITLEN; | |
290 | memcpy(&(ip->u.prefix4), | |
291 | &(evp->prefix.ip.ip), | |
292 | IPV4_MAX_BYTELEN); | |
293 | } else if (IS_EVPN_PREFIX_IPADDR_V6(evp)) { | |
294 | ip->family = AF_INET6; | |
295 | ip->prefixlen = IPV6_MAX_BITLEN; | |
296 | memcpy(&(ip->u.prefix6), | |
297 | &(evp->prefix.ip.ip), | |
298 | IPV6_MAX_BYTELEN); | |
299 | } | |
300 | } | |
301 | ||
d62a17ae | 302 | static inline void build_evpn_type2_prefix(struct prefix_evpn *p, |
303 | struct ethaddr *mac, | |
304 | struct ipaddr *ip) | |
128ea8ab | 305 | { |
d62a17ae | 306 | memset(p, 0, sizeof(struct prefix_evpn)); |
b03b8898 | 307 | p->family = AF_EVPN; |
d62a17ae | 308 | p->prefixlen = EVPN_TYPE_2_ROUTE_PREFIXLEN; |
309 | p->prefix.route_type = BGP_EVPN_MAC_IP_ROUTE; | |
28328ea9 | 310 | memcpy(&p->prefix.mac.octet, mac->octet, ETH_ALEN); |
d62a17ae | 311 | p->prefix.ip.ipa_type = IPADDR_NONE; |
312 | if (ip) | |
313 | memcpy(&p->prefix.ip, ip, sizeof(*ip)); | |
128ea8ab | 314 | } |
315 | ||
342dd0c6 | 316 | static inline void build_type5_prefix_from_ip_prefix(struct prefix_evpn *evp, |
317 | struct prefix *ip_prefix) | |
318 | { | |
319 | struct ipaddr ip; | |
320 | ||
321 | memset(&ip, 0, sizeof(struct ipaddr)); | |
322 | if (ip_prefix->family == AF_INET) { | |
323 | ip.ipa_type = IPADDR_V4; | |
324 | memcpy(&ip.ipaddr_v4, &ip_prefix->u.prefix4, | |
325 | sizeof(struct in_addr)); | |
326 | } else { | |
327 | ip.ipa_type = IPADDR_V6; | |
328 | memcpy(&ip.ipaddr_v6, &ip_prefix->u.prefix6, | |
329 | sizeof(struct in6_addr)); | |
330 | } | |
331 | ||
332 | memset(evp, 0, sizeof(struct prefix_evpn)); | |
333 | evp->family = AF_EVPN; | |
334 | evp->prefixlen = EVPN_TYPE_5_ROUTE_PREFIXLEN; | |
335 | evp->prefix.ip_prefix_length = ip_prefix->prefixlen; | |
336 | evp->prefix.route_type = BGP_EVPN_IP_PREFIX_ROUTE; | |
337 | evp->prefix.ip.ipa_type = ip.ipa_type; | |
338 | memcpy(&evp->prefix.ip, &ip, sizeof(struct ipaddr)); | |
339 | } | |
340 | ||
d62a17ae | 341 | static inline void build_evpn_type3_prefix(struct prefix_evpn *p, |
342 | struct in_addr originator_ip) | |
128ea8ab | 343 | { |
d62a17ae | 344 | memset(p, 0, sizeof(struct prefix_evpn)); |
b03b8898 | 345 | p->family = AF_EVPN; |
d62a17ae | 346 | p->prefixlen = EVPN_TYPE_3_ROUTE_PREFIXLEN; |
347 | p->prefix.route_type = BGP_EVPN_IMET_ROUTE; | |
348 | p->prefix.ip.ipa_type = IPADDR_V4; | |
349 | p->prefix.ip.ipaddr_v4 = originator_ip; | |
128ea8ab | 350 | } |
351 | ||
06d2e8f3 MK |
352 | static inline int advertise_type5_routes(struct bgp *bgp_vrf, |
353 | afi_t afi) | |
354 | { | |
355 | if (!bgp_vrf->l3vni) | |
356 | return 0; | |
357 | ||
358 | if (afi == AFI_IP && | |
359 | CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_ADVERTISE_IPV4_IN_EVPN)) | |
360 | return 1; | |
361 | ||
362 | if (afi == AFI_IP6 && | |
363 | CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_ADVERTISE_IPV6_IN_EVPN)) | |
364 | return 1; | |
365 | ||
366 | return 0; | |
367 | } | |
368 | ||
c581d8b0 | 369 | extern void evpn_rt_delete_auto(struct bgp*, vni_t, struct list*); |
523cafc4 | 370 | extern void bgp_evpn_configure_export_rt_for_vrf(struct bgp *bgp_vrf, |
371 | struct ecommunity *ecomadd); | |
372 | extern void bgp_evpn_unconfigure_export_rt_for_vrf(struct bgp *bgp_vrf, | |
373 | struct ecommunity *ecomdel); | |
374 | extern void bgp_evpn_configure_import_rt_for_vrf(struct bgp *bgp_vrf, | |
375 | struct ecommunity *ecomadd); | |
376 | extern void bgp_evpn_unconfigure_import_rt_for_vrf(struct bgp *bgp_vrf, | |
377 | struct ecommunity *ecomdel); | |
d62a17ae | 378 | extern int bgp_evpn_handle_export_rt_change(struct bgp *bgp, |
379 | struct bgpevpn *vpn); | |
676f83b9 | 380 | extern void bgp_evpn_handle_vrf_rd_change(struct bgp *bgp_vrf, int withdraw); |
d62a17ae | 381 | extern void bgp_evpn_handle_rd_change(struct bgp *bgp, struct bgpevpn *vpn, |
382 | int withdraw); | |
383 | extern int bgp_evpn_install_routes(struct bgp *bgp, struct bgpevpn *vpn); | |
384 | extern int bgp_evpn_uninstall_routes(struct bgp *bgp, struct bgpevpn *vpn); | |
523cafc4 | 385 | extern void bgp_evpn_map_vrf_to_its_rts(struct bgp *bgp_vrf); |
386 | extern void bgp_evpn_unmap_vrf_from_its_rts(struct bgp *bgp_vrf); | |
d62a17ae | 387 | extern void bgp_evpn_map_vni_to_its_rts(struct bgp *bgp, struct bgpevpn *vpn); |
388 | extern void bgp_evpn_unmap_vni_from_its_rts(struct bgp *bgp, | |
389 | struct bgpevpn *vpn); | |
390 | extern void bgp_evpn_derive_auto_rt_import(struct bgp *bgp, | |
391 | struct bgpevpn *vpn); | |
392 | extern void bgp_evpn_derive_auto_rt_export(struct bgp *bgp, | |
393 | struct bgpevpn *vpn); | |
394 | extern void bgp_evpn_derive_auto_rd(struct bgp *bgp, struct bgpevpn *vpn); | |
676f83b9 | 395 | extern void bgp_evpn_derive_auto_rd_for_vrf(struct bgp *bgp); |
d62a17ae | 396 | extern struct bgpevpn *bgp_evpn_lookup_vni(struct bgp *bgp, vni_t vni); |
397 | extern struct bgpevpn *bgp_evpn_new(struct bgp *bgp, vni_t vni, | |
29c53922 MK |
398 | struct in_addr originator_ip, |
399 | vrf_id_t tenant_vrf_id); | |
d62a17ae | 400 | extern void bgp_evpn_free(struct bgp *bgp, struct bgpevpn *vpn); |
a4168ebc | 401 | #endif /* _BGP_EVPN_PRIVATE_H */ |