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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 | |
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 | ||
128ea8ab | 100 | #define RT_TYPE_IMPORT 1 |
101 | #define RT_TYPE_EXPORT 2 | |
102 | #define RT_TYPE_BOTH 3 | |
103 | ||
6d8c58b7 MK |
104 | static inline vni_t bgpevpn_get_l3vni(struct bgpevpn *vpn) |
105 | { | |
106 | struct bgp *bgp_vrf = NULL; | |
107 | ||
108 | bgp_vrf = bgp_lookup_by_vrf_id(vpn->tenant_vrf_id); | |
109 | if (!bgp_vrf) | |
110 | return 0; | |
111 | ||
112 | return bgp_vrf->l3vni; | |
113 | } | |
114 | ||
115 | static inline void bgpevpn_get_rmac(struct bgpevpn *vpn, struct ethaddr *rmac) | |
116 | { | |
117 | struct bgp *bgp_vrf = NULL; | |
118 | ||
119 | memset(rmac, 0, sizeof(struct ethaddr)); | |
120 | bgp_vrf = bgp_lookup_by_vrf_id(vpn->tenant_vrf_id); | |
121 | if (!bgp_vrf) | |
122 | return; | |
123 | memcpy(rmac, &bgp_vrf->rmac, sizeof(struct ethaddr)); | |
124 | } | |
125 | ||
126 | static inline struct list *bgpevpn_get_vrf_export_rtl(struct bgpevpn *vpn) | |
127 | { | |
128 | struct bgp *bgp_vrf = NULL; | |
129 | ||
130 | bgp_vrf = bgp_lookup_by_vrf_id(vpn->tenant_vrf_id); | |
131 | if (!bgp_vrf) | |
132 | return NULL; | |
133 | ||
134 | return bgp_vrf->vrf_export_rtl; | |
135 | } | |
136 | ||
137 | static inline struct list *bgpevpn_get_vrf_import_rtl(struct bgpevpn *vpn) | |
138 | { | |
139 | struct bgp *bgp_vrf = NULL; | |
140 | ||
141 | bgp_vrf = bgp_lookup_by_vrf_id(vpn->tenant_vrf_id); | |
142 | if (!bgp_vrf) | |
143 | return NULL; | |
144 | ||
145 | return bgp_vrf->vrf_import_rtl; | |
146 | } | |
147 | ||
6a8657d0 MK |
148 | static inline void bgpevpn_unlink_from_l3vni(struct bgpevpn *vpn) |
149 | { | |
150 | struct bgp *bgp_vrf = NULL; | |
151 | ||
152 | bgp_vrf = bgp_lookup_by_vrf_id(vpn->tenant_vrf_id); | |
153 | if (!bgp_vrf || !bgp_vrf->l2vnis) | |
154 | return; | |
155 | listnode_delete(bgp_vrf->l2vnis, vpn); | |
156 | } | |
157 | ||
158 | static inline void bgpevpn_link_to_l3vni(struct bgpevpn *vpn) | |
159 | { | |
160 | struct bgp *bgp_vrf = NULL; | |
161 | ||
162 | bgp_vrf = bgp_lookup_by_vrf_id(vpn->tenant_vrf_id); | |
163 | if (!bgp_vrf || !bgp_vrf->l2vnis) | |
164 | return; | |
165 | listnode_add_sort(bgp_vrf->l2vnis, vpn); | |
166 | } | |
167 | ||
d62a17ae | 168 | static inline int is_vni_configured(struct bgpevpn *vpn) |
128ea8ab | 169 | { |
d62a17ae | 170 | return (CHECK_FLAG(vpn->flags, VNI_FLAG_CFGD)); |
128ea8ab | 171 | } |
172 | ||
d62a17ae | 173 | static inline int is_vni_live(struct bgpevpn *vpn) |
128ea8ab | 174 | { |
d62a17ae | 175 | return (CHECK_FLAG(vpn->flags, VNI_FLAG_LIVE)); |
128ea8ab | 176 | } |
177 | ||
d62a17ae | 178 | static inline int is_rd_configured(struct bgpevpn *vpn) |
128ea8ab | 179 | { |
d62a17ae | 180 | return (CHECK_FLAG(vpn->flags, VNI_FLAG_RD_CFGD)); |
128ea8ab | 181 | } |
182 | ||
d62a17ae | 183 | static inline int bgp_evpn_rd_matches_existing(struct bgpevpn *vpn, |
184 | struct prefix_rd *prd) | |
128ea8ab | 185 | { |
d62a17ae | 186 | return (memcmp(&vpn->prd.val, prd->val, ECOMMUNITY_SIZE) == 0); |
128ea8ab | 187 | } |
188 | ||
d62a17ae | 189 | static inline int is_import_rt_configured(struct bgpevpn *vpn) |
128ea8ab | 190 | { |
d62a17ae | 191 | return (CHECK_FLAG(vpn->flags, VNI_FLAG_IMPRT_CFGD)); |
128ea8ab | 192 | } |
193 | ||
d62a17ae | 194 | static inline int is_export_rt_configured(struct bgpevpn *vpn) |
128ea8ab | 195 | { |
d62a17ae | 196 | return (CHECK_FLAG(vpn->flags, VNI_FLAG_EXPRT_CFGD)); |
128ea8ab | 197 | } |
198 | ||
d62a17ae | 199 | static inline int is_vni_param_configured(struct bgpevpn *vpn) |
128ea8ab | 200 | { |
d62a17ae | 201 | return (is_rd_configured(vpn) || is_import_rt_configured(vpn) |
202 | || is_export_rt_configured(vpn)); | |
128ea8ab | 203 | } |
204 | ||
d62a17ae | 205 | static inline void vni2label(vni_t vni, mpls_label_t *label) |
128ea8ab | 206 | { |
d62a17ae | 207 | u_char *tag = (u_char *)label; |
208 | tag[0] = (vni >> 16) & 0xFF; | |
209 | tag[1] = (vni >> 8) & 0xFF; | |
210 | tag[2] = vni & 0xFF; | |
128ea8ab | 211 | } |
212 | ||
d62a17ae | 213 | static inline vni_t label2vni(mpls_label_t *label) |
128ea8ab | 214 | { |
d62a17ae | 215 | u_char *tag = (u_char *)label; |
216 | vni_t vni; | |
128ea8ab | 217 | |
d62a17ae | 218 | vni = ((u_int32_t)*tag++ << 16); |
219 | vni |= (u_int32_t)*tag++ << 8; | |
220 | vni |= (u_int32_t)(*tag & 0xFF); | |
128ea8ab | 221 | |
d62a17ae | 222 | return vni; |
128ea8ab | 223 | } |
224 | ||
d62a17ae | 225 | static inline void encode_mac_mobility_extcomm(int static_mac, u_int32_t seq, |
226 | struct ecommunity_val *eval) | |
128ea8ab | 227 | { |
d62a17ae | 228 | memset(eval, 0, sizeof(*eval)); |
229 | eval->val[0] = ECOMMUNITY_ENCODE_EVPN; | |
230 | eval->val[1] = ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY; | |
231 | if (static_mac) | |
232 | eval->val[2] = ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY_FLAG_STICKY; | |
233 | eval->val[4] = (seq >> 24) & 0xff; | |
234 | eval->val[5] = (seq >> 16) & 0xff; | |
235 | eval->val[6] = (seq >> 8) & 0xff; | |
236 | eval->val[7] = seq & 0xff; | |
128ea8ab | 237 | } |
238 | ||
d62a17ae | 239 | static inline void build_evpn_type2_prefix(struct prefix_evpn *p, |
240 | struct ethaddr *mac, | |
241 | struct ipaddr *ip) | |
128ea8ab | 242 | { |
d62a17ae | 243 | memset(p, 0, sizeof(struct prefix_evpn)); |
b03b8898 | 244 | p->family = AF_EVPN; |
d62a17ae | 245 | p->prefixlen = EVPN_TYPE_2_ROUTE_PREFIXLEN; |
246 | p->prefix.route_type = BGP_EVPN_MAC_IP_ROUTE; | |
28328ea9 | 247 | memcpy(&p->prefix.mac.octet, mac->octet, ETH_ALEN); |
d62a17ae | 248 | p->prefix.ip.ipa_type = IPADDR_NONE; |
249 | if (ip) | |
250 | memcpy(&p->prefix.ip, ip, sizeof(*ip)); | |
128ea8ab | 251 | } |
252 | ||
d62a17ae | 253 | static inline void build_evpn_type3_prefix(struct prefix_evpn *p, |
254 | struct in_addr originator_ip) | |
128ea8ab | 255 | { |
d62a17ae | 256 | memset(p, 0, sizeof(struct prefix_evpn)); |
b03b8898 | 257 | p->family = AF_EVPN; |
d62a17ae | 258 | p->prefixlen = EVPN_TYPE_3_ROUTE_PREFIXLEN; |
259 | p->prefix.route_type = BGP_EVPN_IMET_ROUTE; | |
260 | p->prefix.ip.ipa_type = IPADDR_V4; | |
261 | p->prefix.ip.ipaddr_v4 = originator_ip; | |
128ea8ab | 262 | } |
263 | ||
c581d8b0 MK |
264 | extern void evpn_rt_delete_auto(struct bgp*, vni_t, struct list*); |
265 | extern void bgp_evpn_configure_export_rt_for_vrf(struct bgp*, | |
266 | struct ecommunity*); | |
267 | extern void bgp_evpn_unconfigure_export_rt_for_vrf(struct bgp*, | |
268 | struct ecommunity*); | |
269 | extern void bgp_evpn_configure_import_rt_for_vrf(struct bgp*, | |
270 | struct ecommunity*); | |
271 | extern void bgp_evpn_unconfigure_import_rt_for_vrf(struct bgp*, | |
272 | struct ecommunity*); | |
d62a17ae | 273 | extern int bgp_evpn_handle_export_rt_change(struct bgp *bgp, |
274 | struct bgpevpn *vpn); | |
275 | extern void bgp_evpn_handle_rd_change(struct bgp *bgp, struct bgpevpn *vpn, | |
276 | int withdraw); | |
277 | extern int bgp_evpn_install_routes(struct bgp *bgp, struct bgpevpn *vpn); | |
278 | extern int bgp_evpn_uninstall_routes(struct bgp *bgp, struct bgpevpn *vpn); | |
279 | extern void bgp_evpn_map_vni_to_its_rts(struct bgp *bgp, struct bgpevpn *vpn); | |
280 | extern void bgp_evpn_unmap_vni_from_its_rts(struct bgp *bgp, | |
281 | struct bgpevpn *vpn); | |
282 | extern void bgp_evpn_derive_auto_rt_import(struct bgp *bgp, | |
283 | struct bgpevpn *vpn); | |
284 | extern void bgp_evpn_derive_auto_rt_export(struct bgp *bgp, | |
285 | struct bgpevpn *vpn); | |
286 | extern void bgp_evpn_derive_auto_rd(struct bgp *bgp, struct bgpevpn *vpn); | |
287 | extern struct bgpevpn *bgp_evpn_lookup_vni(struct bgp *bgp, vni_t vni); | |
288 | extern struct bgpevpn *bgp_evpn_new(struct bgp *bgp, vni_t vni, | |
29c53922 MK |
289 | struct in_addr originator_ip, |
290 | vrf_id_t tenant_vrf_id); | |
d62a17ae | 291 | extern void bgp_evpn_free(struct bgp *bgp, struct bgpevpn *vpn); |
a4168ebc | 292 | #endif /* _BGP_EVPN_PRIVATE_H */ |