]>
Commit | Line | Data |
---|---|---|
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 | |
a4168ebc | 33 | /* EVPN prefix lengths. */ |
34 | #define EVPN_TYPE_2_ROUTE_PREFIXLEN 224 | |
35 | #define EVPN_TYPE_3_ROUTE_PREFIXLEN 224 | |
36 | ||
37 | /* EVPN route types. */ | |
d62a17ae | 38 | typedef enum { |
39 | BGP_EVPN_AD_ROUTE = 1, /* Ethernet Auto-Discovery (A-D) route */ | |
40 | BGP_EVPN_MAC_IP_ROUTE, /* MAC/IP Advertisement route */ | |
41 | BGP_EVPN_IMET_ROUTE, /* Inclusive Multicast Ethernet Tag route */ | |
42 | BGP_EVPN_ES_ROUTE, /* Ethernet Segment route */ | |
43 | BGP_EVPN_IP_PREFIX_ROUTE, /* IP Prefix route */ | |
a4168ebc | 44 | } bgp_evpn_route_type; |
45 | ||
46 | /* | |
47 | * Hash table of EVIs. Right now, the only type of EVI supported is with | |
48 | * VxLAN encapsulation, hence each EVI corresponds to a L2 VNI. | |
49 | * The VNIs are not "created" through BGP but through some other interface | |
50 | * on the system. This table stores VNIs that BGP comes to know as present | |
51 | * on the system (through interaction with zebra) as well as pre-configured | |
52 | * VNIs (which need to be defined in the system to become "live"). | |
53 | */ | |
d62a17ae | 54 | struct bgpevpn { |
55 | vni_t vni; | |
29c53922 | 56 | vrf_id_t tenant_vrf_id; |
d62a17ae | 57 | u_int32_t flags; |
a4168ebc | 58 | #define VNI_FLAG_CFGD 0x1 /* VNI is user configured */ |
59 | #define VNI_FLAG_LIVE 0x2 /* VNI is "live" */ | |
60 | #define VNI_FLAG_RD_CFGD 0x4 /* RD is user configured. */ | |
61 | #define VNI_FLAG_IMPRT_CFGD 0x8 /* Import RT is user configured */ | |
62 | #define VNI_FLAG_EXPRT_CFGD 0x10 /* Export RT is user configured */ | |
63 | ||
1a98c087 MK |
64 | /* Flag to indicate if we are advertising the g/w mac ip for this VNI*/ |
65 | u_int8_t advertise_gw_macip; | |
66 | ||
d62a17ae | 67 | /* Id for deriving the RD automatically for this VNI */ |
68 | u_int16_t rd_id; | |
a4168ebc | 69 | |
d62a17ae | 70 | /* RD for this VNI. */ |
71 | struct prefix_rd prd; | |
a4168ebc | 72 | |
d62a17ae | 73 | /* Route type 3 field */ |
74 | struct in_addr originator_ip; | |
a4168ebc | 75 | |
d62a17ae | 76 | /* Import and Export RTs. */ |
77 | struct list *import_rtl; | |
78 | struct list *export_rtl; | |
a4168ebc | 79 | |
d62a17ae | 80 | /* Route table for EVPN routes for this VNI. */ |
81 | struct bgp_table *route_table; | |
a4168ebc | 82 | |
d62a17ae | 83 | QOBJ_FIELDS |
a4168ebc | 84 | }; |
85 | ||
86 | DECLARE_QOBJ_TYPE(bgpevpn) | |
87 | ||
88 | /* Mapping of Import RT to VNIs. | |
89 | * The Import RTs of all VNIs are maintained in a hash table with each | |
90 | * RT linking to all VNIs that will import routes matching this RT. | |
91 | */ | |
d62a17ae | 92 | struct irt_node { |
93 | /* RT */ | |
94 | struct ecommunity_val rt; | |
a4168ebc | 95 | |
d62a17ae | 96 | /* List of VNIs importing routes matching this RT. */ |
97 | struct list *vnis; | |
a4168ebc | 98 | }; |
99 | ||
10ebe1ab MK |
100 | /* Mapping of Import RT to VRFs. |
101 | * The Import RTs of all VRFss are maintained in a hash table with each | |
102 | * RT linking to all VRFs that will import routes matching this RT. | |
103 | */ | |
104 | struct vrf_irt_node { | |
105 | /* RT */ | |
106 | struct ecommunity_val rt; | |
107 | ||
108 | /* List of VNIs importing routes matching this RT. */ | |
109 | struct list *vrfs; | |
110 | }; | |
111 | ||
112 | ||
128ea8ab | 113 | #define RT_TYPE_IMPORT 1 |
114 | #define RT_TYPE_EXPORT 2 | |
115 | #define RT_TYPE_BOTH 3 | |
116 | ||
676f83b9 | 117 | static inline int is_vrf_rd_configured(struct bgp *bgp_vrf) |
118 | { | |
119 | return (CHECK_FLAG(bgp_vrf->vrf_flags, | |
120 | BGP_VRF_RD_CFGD)); | |
121 | } | |
122 | ||
123 | static inline int bgp_evpn_vrf_rd_matches_existing(struct bgp *bgp_vrf, | |
124 | struct prefix_rd *prd) | |
125 | { | |
126 | return (memcmp(&bgp_vrf->vrf_prd.val, prd->val, ECOMMUNITY_SIZE) == 0); | |
127 | } | |
128 | ||
129 | static inline int is_evpn_prefix_routes_adv_enabled(struct bgp *bgp_vrf) | |
130 | { | |
131 | if (!bgp_vrf->l3vni || | |
132 | !CHECK_FLAG(bgp_vrf->vrf_flags, BGP_VRF_ADVERTISE_EVPN_PREFIX_ROUTE)) | |
133 | return 0; | |
134 | ||
135 | return 1; | |
136 | } | |
137 | ||
6d8c58b7 MK |
138 | static inline vni_t bgpevpn_get_l3vni(struct bgpevpn *vpn) |
139 | { | |
140 | struct bgp *bgp_vrf = NULL; | |
141 | ||
142 | bgp_vrf = bgp_lookup_by_vrf_id(vpn->tenant_vrf_id); | |
143 | if (!bgp_vrf) | |
144 | return 0; | |
145 | ||
146 | return bgp_vrf->l3vni; | |
147 | } | |
148 | ||
149 | static inline void bgpevpn_get_rmac(struct bgpevpn *vpn, struct ethaddr *rmac) | |
150 | { | |
151 | struct bgp *bgp_vrf = NULL; | |
152 | ||
153 | memset(rmac, 0, sizeof(struct ethaddr)); | |
154 | bgp_vrf = bgp_lookup_by_vrf_id(vpn->tenant_vrf_id); | |
155 | if (!bgp_vrf) | |
156 | return; | |
157 | memcpy(rmac, &bgp_vrf->rmac, sizeof(struct ethaddr)); | |
158 | } | |
159 | ||
160 | static inline struct list *bgpevpn_get_vrf_export_rtl(struct bgpevpn *vpn) | |
161 | { | |
162 | struct bgp *bgp_vrf = NULL; | |
163 | ||
164 | bgp_vrf = bgp_lookup_by_vrf_id(vpn->tenant_vrf_id); | |
165 | if (!bgp_vrf) | |
166 | return NULL; | |
167 | ||
168 | return bgp_vrf->vrf_export_rtl; | |
169 | } | |
170 | ||
171 | static inline struct list *bgpevpn_get_vrf_import_rtl(struct bgpevpn *vpn) | |
172 | { | |
173 | struct bgp *bgp_vrf = NULL; | |
174 | ||
175 | bgp_vrf = bgp_lookup_by_vrf_id(vpn->tenant_vrf_id); | |
176 | if (!bgp_vrf) | |
177 | return NULL; | |
178 | ||
179 | return bgp_vrf->vrf_import_rtl; | |
180 | } | |
181 | ||
6a8657d0 MK |
182 | static inline void bgpevpn_unlink_from_l3vni(struct bgpevpn *vpn) |
183 | { | |
184 | struct bgp *bgp_vrf = NULL; | |
185 | ||
186 | bgp_vrf = bgp_lookup_by_vrf_id(vpn->tenant_vrf_id); | |
187 | if (!bgp_vrf || !bgp_vrf->l2vnis) | |
188 | return; | |
189 | listnode_delete(bgp_vrf->l2vnis, vpn); | |
190 | } | |
191 | ||
192 | static inline void bgpevpn_link_to_l3vni(struct bgpevpn *vpn) | |
193 | { | |
194 | struct bgp *bgp_vrf = NULL; | |
195 | ||
196 | bgp_vrf = bgp_lookup_by_vrf_id(vpn->tenant_vrf_id); | |
197 | if (!bgp_vrf || !bgp_vrf->l2vnis) | |
198 | return; | |
199 | listnode_add_sort(bgp_vrf->l2vnis, vpn); | |
200 | } | |
201 | ||
d62a17ae | 202 | static inline int is_vni_configured(struct bgpevpn *vpn) |
128ea8ab | 203 | { |
d62a17ae | 204 | return (CHECK_FLAG(vpn->flags, VNI_FLAG_CFGD)); |
128ea8ab | 205 | } |
206 | ||
d62a17ae | 207 | static inline int is_vni_live(struct bgpevpn *vpn) |
128ea8ab | 208 | { |
d62a17ae | 209 | return (CHECK_FLAG(vpn->flags, VNI_FLAG_LIVE)); |
128ea8ab | 210 | } |
211 | ||
d62a17ae | 212 | static inline int is_rd_configured(struct bgpevpn *vpn) |
128ea8ab | 213 | { |
d62a17ae | 214 | return (CHECK_FLAG(vpn->flags, VNI_FLAG_RD_CFGD)); |
128ea8ab | 215 | } |
216 | ||
d62a17ae | 217 | static inline int bgp_evpn_rd_matches_existing(struct bgpevpn *vpn, |
218 | struct prefix_rd *prd) | |
128ea8ab | 219 | { |
d62a17ae | 220 | return (memcmp(&vpn->prd.val, prd->val, ECOMMUNITY_SIZE) == 0); |
128ea8ab | 221 | } |
222 | ||
d62a17ae | 223 | static inline int is_import_rt_configured(struct bgpevpn *vpn) |
128ea8ab | 224 | { |
d62a17ae | 225 | return (CHECK_FLAG(vpn->flags, VNI_FLAG_IMPRT_CFGD)); |
128ea8ab | 226 | } |
227 | ||
d62a17ae | 228 | static inline int is_export_rt_configured(struct bgpevpn *vpn) |
128ea8ab | 229 | { |
d62a17ae | 230 | return (CHECK_FLAG(vpn->flags, VNI_FLAG_EXPRT_CFGD)); |
128ea8ab | 231 | } |
232 | ||
d62a17ae | 233 | static inline int is_vni_param_configured(struct bgpevpn *vpn) |
128ea8ab | 234 | { |
d62a17ae | 235 | return (is_rd_configured(vpn) || is_import_rt_configured(vpn) |
236 | || is_export_rt_configured(vpn)); | |
128ea8ab | 237 | } |
238 | ||
d62a17ae | 239 | static inline void vni2label(vni_t vni, mpls_label_t *label) |
128ea8ab | 240 | { |
d62a17ae | 241 | u_char *tag = (u_char *)label; |
242 | tag[0] = (vni >> 16) & 0xFF; | |
243 | tag[1] = (vni >> 8) & 0xFF; | |
244 | tag[2] = vni & 0xFF; | |
128ea8ab | 245 | } |
246 | ||
d62a17ae | 247 | static inline vni_t label2vni(mpls_label_t *label) |
128ea8ab | 248 | { |
d62a17ae | 249 | u_char *tag = (u_char *)label; |
250 | vni_t vni; | |
128ea8ab | 251 | |
d62a17ae | 252 | vni = ((u_int32_t)*tag++ << 16); |
253 | vni |= (u_int32_t)*tag++ << 8; | |
254 | vni |= (u_int32_t)(*tag & 0xFF); | |
128ea8ab | 255 | |
d62a17ae | 256 | return vni; |
128ea8ab | 257 | } |
258 | ||
bc59a672 MK |
259 | static inline void encode_rmac_extcomm(struct ecommunity_val *eval, |
260 | struct ethaddr *rmac) | |
261 | { | |
262 | memset(eval, 0, sizeof(*eval)); | |
263 | eval->val[0] = ECOMMUNITY_ENCODE_EVPN; | |
264 | eval->val[1] = ECOMMUNITY_EVPN_SUBTYPE_ROUTERMAC; | |
265 | memcpy(&eval->val[2], rmac, ETH_ALEN); | |
266 | } | |
267 | ||
d62a17ae | 268 | static inline void encode_mac_mobility_extcomm(int static_mac, u_int32_t seq, |
269 | struct ecommunity_val *eval) | |
128ea8ab | 270 | { |
d62a17ae | 271 | memset(eval, 0, sizeof(*eval)); |
272 | eval->val[0] = ECOMMUNITY_ENCODE_EVPN; | |
273 | eval->val[1] = ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY; | |
274 | if (static_mac) | |
275 | eval->val[2] = ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY_FLAG_STICKY; | |
276 | eval->val[4] = (seq >> 24) & 0xff; | |
277 | eval->val[5] = (seq >> 16) & 0xff; | |
278 | eval->val[6] = (seq >> 8) & 0xff; | |
279 | eval->val[7] = seq & 0xff; | |
128ea8ab | 280 | } |
281 | ||
d3135ba3 | 282 | static inline void ip_prefix_from_type2_prefix(struct prefix_evpn *evp, |
283 | struct prefix *ip) | |
284 | { | |
285 | memset(ip, 0, sizeof(struct prefix)); | |
286 | if (IS_EVPN_PREFIX_IPADDR_V4(evp)) { | |
287 | ip->family = AF_INET; | |
288 | ip->prefixlen = IPV4_MAX_BITLEN; | |
289 | memcpy(&(ip->u.prefix4), | |
290 | &(evp->prefix.ip.ip), | |
291 | IPV4_MAX_BYTELEN); | |
292 | } else if (IS_EVPN_PREFIX_IPADDR_V6(evp)) { | |
293 | ip->family = AF_INET6; | |
294 | ip->prefixlen = IPV6_MAX_BITLEN; | |
295 | memcpy(&(ip->u.prefix6), | |
296 | &(evp->prefix.ip.ip), | |
297 | IPV6_MAX_BYTELEN); | |
298 | } | |
299 | } | |
300 | ||
d62a17ae | 301 | static inline void build_evpn_type2_prefix(struct prefix_evpn *p, |
302 | struct ethaddr *mac, | |
303 | struct ipaddr *ip) | |
128ea8ab | 304 | { |
d62a17ae | 305 | memset(p, 0, sizeof(struct prefix_evpn)); |
b03b8898 | 306 | p->family = AF_EVPN; |
d62a17ae | 307 | p->prefixlen = EVPN_TYPE_2_ROUTE_PREFIXLEN; |
308 | p->prefix.route_type = BGP_EVPN_MAC_IP_ROUTE; | |
28328ea9 | 309 | memcpy(&p->prefix.mac.octet, mac->octet, ETH_ALEN); |
d62a17ae | 310 | p->prefix.ip.ipa_type = IPADDR_NONE; |
311 | if (ip) | |
312 | memcpy(&p->prefix.ip, ip, sizeof(*ip)); | |
128ea8ab | 313 | } |
314 | ||
d62a17ae | 315 | static inline void build_evpn_type3_prefix(struct prefix_evpn *p, |
316 | struct in_addr originator_ip) | |
128ea8ab | 317 | { |
d62a17ae | 318 | memset(p, 0, sizeof(struct prefix_evpn)); |
b03b8898 | 319 | p->family = AF_EVPN; |
d62a17ae | 320 | p->prefixlen = EVPN_TYPE_3_ROUTE_PREFIXLEN; |
321 | p->prefix.route_type = BGP_EVPN_IMET_ROUTE; | |
322 | p->prefix.ip.ipa_type = IPADDR_V4; | |
323 | p->prefix.ip.ipaddr_v4 = originator_ip; | |
128ea8ab | 324 | } |
325 | ||
c581d8b0 MK |
326 | extern void evpn_rt_delete_auto(struct bgp*, vni_t, struct list*); |
327 | extern void bgp_evpn_configure_export_rt_for_vrf(struct bgp*, | |
328 | struct ecommunity*); | |
329 | extern void bgp_evpn_unconfigure_export_rt_for_vrf(struct bgp*, | |
330 | struct ecommunity*); | |
331 | extern void bgp_evpn_configure_import_rt_for_vrf(struct bgp*, | |
332 | struct ecommunity*); | |
333 | extern void bgp_evpn_unconfigure_import_rt_for_vrf(struct bgp*, | |
334 | struct ecommunity*); | |
d62a17ae | 335 | extern int bgp_evpn_handle_export_rt_change(struct bgp *bgp, |
336 | struct bgpevpn *vpn); | |
676f83b9 | 337 | extern void bgp_evpn_handle_vrf_rd_change(struct bgp *bgp_vrf, int withdraw); |
d62a17ae | 338 | extern void bgp_evpn_handle_rd_change(struct bgp *bgp, struct bgpevpn *vpn, |
339 | int withdraw); | |
340 | extern int bgp_evpn_install_routes(struct bgp *bgp, struct bgpevpn *vpn); | |
341 | extern int bgp_evpn_uninstall_routes(struct bgp *bgp, struct bgpevpn *vpn); | |
10ebe1ab MK |
342 | extern void bgp_evpn_map_vrf_to_its_rts(struct bgp *); |
343 | extern void bgp_evpn_unmap_vrf_from_its_rts(struct bgp *); | |
d62a17ae | 344 | extern void bgp_evpn_map_vni_to_its_rts(struct bgp *bgp, struct bgpevpn *vpn); |
345 | extern void bgp_evpn_unmap_vni_from_its_rts(struct bgp *bgp, | |
346 | struct bgpevpn *vpn); | |
347 | extern void bgp_evpn_derive_auto_rt_import(struct bgp *bgp, | |
348 | struct bgpevpn *vpn); | |
349 | extern void bgp_evpn_derive_auto_rt_export(struct bgp *bgp, | |
350 | struct bgpevpn *vpn); | |
351 | extern void bgp_evpn_derive_auto_rd(struct bgp *bgp, struct bgpevpn *vpn); | |
676f83b9 | 352 | extern void bgp_evpn_derive_auto_rd_for_vrf(struct bgp *bgp); |
d62a17ae | 353 | extern struct bgpevpn *bgp_evpn_lookup_vni(struct bgp *bgp, vni_t vni); |
354 | extern struct bgpevpn *bgp_evpn_new(struct bgp *bgp, vni_t vni, | |
29c53922 MK |
355 | struct in_addr originator_ip, |
356 | vrf_id_t tenant_vrf_id); | |
d62a17ae | 357 | extern void bgp_evpn_free(struct bgp *bgp, struct bgpevpn *vpn); |
a4168ebc | 358 | #endif /* _BGP_EVPN_PRIVATE_H */ |