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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; |
d7c0a89a | 58 | uint32_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 */ | |
c48d9f5f MK |
64 | #define VNI_FLAG_USE_TWO_LABELS 0x20 /* Attach both L2-VNI and L3-VNI if |
65 | needed for this VPN */ | |
a4168ebc | 66 | |
bc4606bd MK |
67 | struct bgp *bgp_vrf; /* back pointer to the vrf instance */ |
68 | ||
996c9314 LB |
69 | /* Flag to indicate if we are |
70 | * advertising the g/w mac ip for | |
71 | * this VNI*/ | |
d7c0a89a | 72 | uint8_t advertise_gw_macip; |
1a98c087 | 73 | |
d7c0a89a QY |
74 | /* Flag to indicate if we are |
75 | * advertising subnet for this VNI */ | |
76 | uint8_t advertise_subnet; | |
31310b25 | 77 | |
d7c0a89a QY |
78 | /* Id for deriving the RD |
79 | * automatically for this VNI */ | |
80 | uint16_t rd_id; | |
a4168ebc | 81 | |
d7c0a89a QY |
82 | /* RD for this VNI. */ |
83 | struct prefix_rd prd; | |
a4168ebc | 84 | |
d7c0a89a QY |
85 | /* Route type 3 field */ |
86 | struct in_addr originator_ip; | |
a4168ebc | 87 | |
d7c0a89a QY |
88 | /* Import and Export RTs. */ |
89 | struct list *import_rtl; | |
90 | struct list *export_rtl; | |
a4168ebc | 91 | |
d7c0a89a QY |
92 | /* Route table for EVPN routes for |
93 | * this VNI. */ | |
94 | struct bgp_table *route_table; | |
a4168ebc | 95 | |
d7c0a89a | 96 | QOBJ_FIELDS |
a4168ebc | 97 | }; |
98 | ||
99 | DECLARE_QOBJ_TYPE(bgpevpn) | |
100 | ||
101 | /* Mapping of Import RT to VNIs. | |
102 | * The Import RTs of all VNIs are maintained in a hash table with each | |
103 | * RT linking to all VNIs that will import routes matching this RT. | |
104 | */ | |
d62a17ae | 105 | struct irt_node { |
106 | /* RT */ | |
107 | struct ecommunity_val rt; | |
a4168ebc | 108 | |
d62a17ae | 109 | /* List of VNIs importing routes matching this RT. */ |
110 | struct list *vnis; | |
a4168ebc | 111 | }; |
112 | ||
10ebe1ab MK |
113 | /* Mapping of Import RT to VRFs. |
114 | * The Import RTs of all VRFss are maintained in a hash table with each | |
115 | * RT linking to all VRFs that will import routes matching this RT. | |
116 | */ | |
117 | struct vrf_irt_node { | |
118 | /* RT */ | |
119 | struct ecommunity_val rt; | |
120 | ||
121 | /* List of VNIs importing routes matching this RT. */ | |
122 | struct list *vrfs; | |
123 | }; | |
124 | ||
125 | ||
128ea8ab | 126 | #define RT_TYPE_IMPORT 1 |
127 | #define RT_TYPE_EXPORT 2 | |
128 | #define RT_TYPE_BOTH 3 | |
129 | ||
676f83b9 | 130 | static inline int is_vrf_rd_configured(struct bgp *bgp_vrf) |
131 | { | |
996c9314 | 132 | return (CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_RD_CFGD)); |
676f83b9 | 133 | } |
134 | ||
135 | static inline int bgp_evpn_vrf_rd_matches_existing(struct bgp *bgp_vrf, | |
136 | struct prefix_rd *prd) | |
137 | { | |
138 | return (memcmp(&bgp_vrf->vrf_prd.val, prd->val, ECOMMUNITY_SIZE) == 0); | |
139 | } | |
140 | ||
6d8c58b7 MK |
141 | static inline vni_t bgpevpn_get_l3vni(struct bgpevpn *vpn) |
142 | { | |
bc4606bd | 143 | return vpn->bgp_vrf ? vpn->bgp_vrf->l3vni : 0; |
6d8c58b7 MK |
144 | } |
145 | ||
146 | static inline void bgpevpn_get_rmac(struct bgpevpn *vpn, struct ethaddr *rmac) | |
147 | { | |
6d8c58b7 | 148 | memset(rmac, 0, sizeof(struct ethaddr)); |
bc4606bd | 149 | if (!vpn->bgp_vrf) |
6d8c58b7 | 150 | return; |
bc4606bd | 151 | memcpy(rmac, &vpn->bgp_vrf->rmac, sizeof(struct ethaddr)); |
6d8c58b7 MK |
152 | } |
153 | ||
154 | static inline struct list *bgpevpn_get_vrf_export_rtl(struct bgpevpn *vpn) | |
155 | { | |
bc4606bd | 156 | if (!vpn->bgp_vrf) |
6d8c58b7 MK |
157 | return NULL; |
158 | ||
bc4606bd | 159 | return vpn->bgp_vrf->vrf_export_rtl; |
6d8c58b7 MK |
160 | } |
161 | ||
162 | static inline struct list *bgpevpn_get_vrf_import_rtl(struct bgpevpn *vpn) | |
163 | { | |
bc4606bd | 164 | if (!vpn->bgp_vrf) |
6d8c58b7 MK |
165 | return NULL; |
166 | ||
bc4606bd | 167 | return vpn->bgp_vrf->vrf_import_rtl; |
6d8c58b7 MK |
168 | } |
169 | ||
6a8657d0 MK |
170 | static inline void bgpevpn_unlink_from_l3vni(struct bgpevpn *vpn) |
171 | { | |
bc4606bd MK |
172 | /* bail if vpn is not associated to bgp_vrf */ |
173 | if (!vpn->bgp_vrf) | |
6a8657d0 | 174 | return; |
996c9314 | 175 | |
c48d9f5f | 176 | UNSET_FLAG(vpn->flags, VNI_FLAG_USE_TWO_LABELS); |
bc4606bd | 177 | listnode_delete(vpn->bgp_vrf->l2vnis, vpn); |
996c9314 | 178 | |
bc4606bd MK |
179 | /* remove the backpointer to the vrf instance */ |
180 | vpn->bgp_vrf = NULL; | |
6a8657d0 MK |
181 | } |
182 | ||
183 | static inline void bgpevpn_link_to_l3vni(struct bgpevpn *vpn) | |
184 | { | |
185 | struct bgp *bgp_vrf = NULL; | |
186 | ||
bc4606bd MK |
187 | /* bail if vpn is already associated to vrf */ |
188 | if (vpn->bgp_vrf) | |
189 | return; | |
190 | ||
6a8657d0 | 191 | bgp_vrf = bgp_lookup_by_vrf_id(vpn->tenant_vrf_id); |
c48d9f5f | 192 | if (!bgp_vrf) |
6a8657d0 | 193 | return; |
c48d9f5f | 194 | |
bc4606bd MK |
195 | /* associate the vpn to the bgp_vrf instance */ |
196 | vpn->bgp_vrf = bgp_vrf; | |
6a8657d0 | 197 | listnode_add_sort(bgp_vrf->l2vnis, vpn); |
83ea2eb0 | 198 | |
c48d9f5f | 199 | /* check if we are advertising two labels for this vpn */ |
996c9314 | 200 | if (!CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_L3VNI_PREFIX_ROUTES_ONLY)) |
c48d9f5f | 201 | SET_FLAG(vpn->flags, VNI_FLAG_USE_TWO_LABELS); |
6a8657d0 MK |
202 | } |
203 | ||
d62a17ae | 204 | static inline int is_vni_configured(struct bgpevpn *vpn) |
128ea8ab | 205 | { |
d62a17ae | 206 | return (CHECK_FLAG(vpn->flags, VNI_FLAG_CFGD)); |
128ea8ab | 207 | } |
208 | ||
d62a17ae | 209 | static inline int is_vni_live(struct bgpevpn *vpn) |
128ea8ab | 210 | { |
d62a17ae | 211 | return (CHECK_FLAG(vpn->flags, VNI_FLAG_LIVE)); |
128ea8ab | 212 | } |
213 | ||
d62a17ae | 214 | static inline int is_rd_configured(struct bgpevpn *vpn) |
128ea8ab | 215 | { |
d62a17ae | 216 | return (CHECK_FLAG(vpn->flags, VNI_FLAG_RD_CFGD)); |
128ea8ab | 217 | } |
218 | ||
d62a17ae | 219 | static inline int bgp_evpn_rd_matches_existing(struct bgpevpn *vpn, |
220 | struct prefix_rd *prd) | |
128ea8ab | 221 | { |
d62a17ae | 222 | return (memcmp(&vpn->prd.val, prd->val, ECOMMUNITY_SIZE) == 0); |
128ea8ab | 223 | } |
224 | ||
d62a17ae | 225 | static inline int is_import_rt_configured(struct bgpevpn *vpn) |
128ea8ab | 226 | { |
d62a17ae | 227 | return (CHECK_FLAG(vpn->flags, VNI_FLAG_IMPRT_CFGD)); |
128ea8ab | 228 | } |
229 | ||
d62a17ae | 230 | static inline int is_export_rt_configured(struct bgpevpn *vpn) |
128ea8ab | 231 | { |
d62a17ae | 232 | return (CHECK_FLAG(vpn->flags, VNI_FLAG_EXPRT_CFGD)); |
128ea8ab | 233 | } |
234 | ||
d62a17ae | 235 | static inline int is_vni_param_configured(struct bgpevpn *vpn) |
128ea8ab | 236 | { |
d62a17ae | 237 | return (is_rd_configured(vpn) || is_import_rt_configured(vpn) |
238 | || is_export_rt_configured(vpn)); | |
128ea8ab | 239 | } |
240 | ||
bc59a672 MK |
241 | static inline void encode_rmac_extcomm(struct ecommunity_val *eval, |
242 | struct ethaddr *rmac) | |
243 | { | |
244 | memset(eval, 0, sizeof(*eval)); | |
245 | eval->val[0] = ECOMMUNITY_ENCODE_EVPN; | |
246 | eval->val[1] = ECOMMUNITY_EVPN_SUBTYPE_ROUTERMAC; | |
247 | memcpy(&eval->val[2], rmac, ETH_ALEN); | |
248 | } | |
249 | ||
ead40654 MK |
250 | static inline void encode_default_gw_extcomm(struct ecommunity_val *eval) |
251 | { | |
252 | memset(eval, 0, sizeof(*eval)); | |
253 | eval->val[0] = ECOMMUNITY_ENCODE_OPAQUE; | |
254 | eval->val[1] = ECOMMUNITY_EVPN_SUBTYPE_DEF_GW; | |
255 | } | |
256 | ||
d7c0a89a | 257 | static inline void encode_mac_mobility_extcomm(int static_mac, uint32_t seq, |
d62a17ae | 258 | struct ecommunity_val *eval) |
128ea8ab | 259 | { |
d62a17ae | 260 | memset(eval, 0, sizeof(*eval)); |
261 | eval->val[0] = ECOMMUNITY_ENCODE_EVPN; | |
262 | eval->val[1] = ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY; | |
263 | if (static_mac) | |
264 | eval->val[2] = ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY_FLAG_STICKY; | |
265 | eval->val[4] = (seq >> 24) & 0xff; | |
266 | eval->val[5] = (seq >> 16) & 0xff; | |
267 | eval->val[6] = (seq >> 8) & 0xff; | |
268 | eval->val[7] = seq & 0xff; | |
128ea8ab | 269 | } |
270 | ||
90264d64 MK |
271 | static inline void ip_prefix_from_type5_prefix(struct prefix_evpn *evp, |
272 | struct prefix *ip) | |
273 | { | |
274 | memset(ip, 0, sizeof(struct prefix)); | |
275 | if (IS_EVPN_PREFIX_IPADDR_V4(evp)) { | |
276 | ip->family = AF_INET; | |
277 | ip->prefixlen = evp->prefix.ip_prefix_length; | |
996c9314 | 278 | memcpy(&(ip->u.prefix4), &(evp->prefix.ip.ip), |
90264d64 MK |
279 | IPV4_MAX_BYTELEN); |
280 | } else if (IS_EVPN_PREFIX_IPADDR_V6(evp)) { | |
281 | ip->family = AF_INET6; | |
282 | ip->prefixlen = evp->prefix.ip_prefix_length; | |
996c9314 | 283 | memcpy(&(ip->u.prefix6), &(evp->prefix.ip.ip), |
90264d64 MK |
284 | IPV6_MAX_BYTELEN); |
285 | } | |
286 | } | |
287 | ||
6fb219da MK |
288 | static inline int is_evpn_prefix_default(struct prefix *evp) |
289 | { | |
290 | if (evp->family != AF_EVPN) | |
291 | return 0; | |
292 | ||
293 | return ((evp->u.prefix_evpn.ip_prefix_length == 0) ? 1 : 0); | |
294 | } | |
295 | ||
d3135ba3 | 296 | static inline void ip_prefix_from_type2_prefix(struct prefix_evpn *evp, |
297 | struct prefix *ip) | |
298 | { | |
299 | memset(ip, 0, sizeof(struct prefix)); | |
300 | if (IS_EVPN_PREFIX_IPADDR_V4(evp)) { | |
301 | ip->family = AF_INET; | |
302 | ip->prefixlen = IPV4_MAX_BITLEN; | |
996c9314 | 303 | memcpy(&(ip->u.prefix4), &(evp->prefix.ip.ip), |
d3135ba3 | 304 | IPV4_MAX_BYTELEN); |
305 | } else if (IS_EVPN_PREFIX_IPADDR_V6(evp)) { | |
306 | ip->family = AF_INET6; | |
307 | ip->prefixlen = IPV6_MAX_BITLEN; | |
996c9314 | 308 | memcpy(&(ip->u.prefix6), &(evp->prefix.ip.ip), |
d3135ba3 | 309 | IPV6_MAX_BYTELEN); |
310 | } | |
311 | } | |
312 | ||
d62a17ae | 313 | static inline void build_evpn_type2_prefix(struct prefix_evpn *p, |
314 | struct ethaddr *mac, | |
315 | struct ipaddr *ip) | |
128ea8ab | 316 | { |
d62a17ae | 317 | memset(p, 0, sizeof(struct prefix_evpn)); |
b03b8898 | 318 | p->family = AF_EVPN; |
d62a17ae | 319 | p->prefixlen = EVPN_TYPE_2_ROUTE_PREFIXLEN; |
320 | p->prefix.route_type = BGP_EVPN_MAC_IP_ROUTE; | |
28328ea9 | 321 | memcpy(&p->prefix.mac.octet, mac->octet, ETH_ALEN); |
d62a17ae | 322 | p->prefix.ip.ipa_type = IPADDR_NONE; |
323 | if (ip) | |
324 | memcpy(&p->prefix.ip, ip, sizeof(*ip)); | |
128ea8ab | 325 | } |
326 | ||
342dd0c6 | 327 | static inline void build_type5_prefix_from_ip_prefix(struct prefix_evpn *evp, |
328 | struct prefix *ip_prefix) | |
329 | { | |
330 | struct ipaddr ip; | |
331 | ||
332 | memset(&ip, 0, sizeof(struct ipaddr)); | |
333 | if (ip_prefix->family == AF_INET) { | |
334 | ip.ipa_type = IPADDR_V4; | |
335 | memcpy(&ip.ipaddr_v4, &ip_prefix->u.prefix4, | |
336 | sizeof(struct in_addr)); | |
337 | } else { | |
338 | ip.ipa_type = IPADDR_V6; | |
339 | memcpy(&ip.ipaddr_v6, &ip_prefix->u.prefix6, | |
340 | sizeof(struct in6_addr)); | |
341 | } | |
342 | ||
343 | memset(evp, 0, sizeof(struct prefix_evpn)); | |
344 | evp->family = AF_EVPN; | |
345 | evp->prefixlen = EVPN_TYPE_5_ROUTE_PREFIXLEN; | |
346 | evp->prefix.ip_prefix_length = ip_prefix->prefixlen; | |
347 | evp->prefix.route_type = BGP_EVPN_IP_PREFIX_ROUTE; | |
348 | evp->prefix.ip.ipa_type = ip.ipa_type; | |
349 | memcpy(&evp->prefix.ip, &ip, sizeof(struct ipaddr)); | |
350 | } | |
351 | ||
d62a17ae | 352 | static inline void build_evpn_type3_prefix(struct prefix_evpn *p, |
353 | struct in_addr originator_ip) | |
128ea8ab | 354 | { |
d62a17ae | 355 | memset(p, 0, sizeof(struct prefix_evpn)); |
b03b8898 | 356 | p->family = AF_EVPN; |
d62a17ae | 357 | p->prefixlen = EVPN_TYPE_3_ROUTE_PREFIXLEN; |
358 | p->prefix.route_type = BGP_EVPN_IMET_ROUTE; | |
359 | p->prefix.ip.ipa_type = IPADDR_V4; | |
360 | p->prefix.ip.ipaddr_v4 = originator_ip; | |
128ea8ab | 361 | } |
362 | ||
486456ca MK |
363 | static inline int evpn_default_originate_set(struct bgp *bgp, afi_t afi, |
364 | safi_t safi) | |
365 | { | |
366 | if (afi == AFI_IP && | |
367 | CHECK_FLAG(bgp->af_flags[AFI_L2VPN][SAFI_EVPN], | |
368 | BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV4)) | |
369 | return 1; | |
370 | else if (afi == AFI_IP6 && | |
371 | CHECK_FLAG(bgp->af_flags[AFI_L2VPN][SAFI_EVPN], | |
372 | BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV6)) | |
373 | return 1; | |
374 | return 0; | |
375 | } | |
376 | ||
996c9314 | 377 | extern void evpn_rt_delete_auto(struct bgp *, vni_t, struct list *); |
523cafc4 | 378 | extern void bgp_evpn_configure_export_rt_for_vrf(struct bgp *bgp_vrf, |
379 | struct ecommunity *ecomadd); | |
380 | extern void bgp_evpn_unconfigure_export_rt_for_vrf(struct bgp *bgp_vrf, | |
381 | struct ecommunity *ecomdel); | |
382 | extern void bgp_evpn_configure_import_rt_for_vrf(struct bgp *bgp_vrf, | |
383 | struct ecommunity *ecomadd); | |
384 | extern void bgp_evpn_unconfigure_import_rt_for_vrf(struct bgp *bgp_vrf, | |
385 | struct ecommunity *ecomdel); | |
d62a17ae | 386 | extern int bgp_evpn_handle_export_rt_change(struct bgp *bgp, |
387 | struct bgpevpn *vpn); | |
676f83b9 | 388 | extern void bgp_evpn_handle_vrf_rd_change(struct bgp *bgp_vrf, int withdraw); |
d62a17ae | 389 | extern void bgp_evpn_handle_rd_change(struct bgp *bgp, struct bgpevpn *vpn, |
390 | int withdraw); | |
391 | extern int bgp_evpn_install_routes(struct bgp *bgp, struct bgpevpn *vpn); | |
392 | extern int bgp_evpn_uninstall_routes(struct bgp *bgp, struct bgpevpn *vpn); | |
523cafc4 | 393 | extern void bgp_evpn_map_vrf_to_its_rts(struct bgp *bgp_vrf); |
394 | extern void bgp_evpn_unmap_vrf_from_its_rts(struct bgp *bgp_vrf); | |
d62a17ae | 395 | extern void bgp_evpn_map_vni_to_its_rts(struct bgp *bgp, struct bgpevpn *vpn); |
396 | extern void bgp_evpn_unmap_vni_from_its_rts(struct bgp *bgp, | |
397 | struct bgpevpn *vpn); | |
398 | extern void bgp_evpn_derive_auto_rt_import(struct bgp *bgp, | |
399 | struct bgpevpn *vpn); | |
400 | extern void bgp_evpn_derive_auto_rt_export(struct bgp *bgp, | |
401 | struct bgpevpn *vpn); | |
402 | extern void bgp_evpn_derive_auto_rd(struct bgp *bgp, struct bgpevpn *vpn); | |
676f83b9 | 403 | extern void bgp_evpn_derive_auto_rd_for_vrf(struct bgp *bgp); |
d62a17ae | 404 | extern struct bgpevpn *bgp_evpn_lookup_vni(struct bgp *bgp, vni_t vni); |
405 | extern struct bgpevpn *bgp_evpn_new(struct bgp *bgp, vni_t vni, | |
29c53922 MK |
406 | struct in_addr originator_ip, |
407 | vrf_id_t tenant_vrf_id); | |
d62a17ae | 408 | extern void bgp_evpn_free(struct bgp *bgp, struct bgpevpn *vpn); |
a4168ebc | 409 | #endif /* _BGP_EVPN_PRIVATE_H */ |