bgpd/bgp_evpn.h

   1 /* E-VPN header for packet handling
   2  * Copyright (C) 2016 6WIND
   3  *
   4  * This file is part of FRRouting.
   5  *
   6  * FRRouting 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  * FRRouting 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 along
  17  * with this program; see the file COPYING; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #ifndef _QUAGGA_BGP_EVPN_H
  22 #define _QUAGGA_BGP_EVPN_H
  23
  24 #include "vxlan.h"
  25 #include "bgpd.h"
  26
  27 #define EVPN_ROUTE_STRLEN 200 /* Must be >> MAC + IPv6 strings. */
  28 #define EVPN_AUTORT_VXLAN 0x10000000
  29
  30 #define EVPN_ENABLED(bgp)  (bgp)->advertise_all_vni
  31 static inline int is_evpn_enabled(void)
  32 {
  33         struct bgp *bgp = NULL;
  34
  35         bgp = bgp_get_evpn();
  36         return bgp ? EVPN_ENABLED(bgp) : 0;
  37 }
  38
  39 static inline void vni2label(vni_t vni, mpls_label_t *label)
  40 {
  41         uint8_t *tag = (uint8_t *)label;
  42
  43         tag[0] = (vni >> 16) & 0xFF;
  44         tag[1] = (vni >> 8) & 0xFF;
  45         tag[2] = vni & 0xFF;
  46 }
  47
  48 static inline vni_t label2vni(mpls_label_t *label)
  49 {
  50         uint8_t *tag = (uint8_t *)label;
  51         vni_t vni;
  52
  53         vni = ((uint32_t)*tag++ << 16);
  54         vni |= (uint32_t)*tag++ << 8;
  55         vni |= (uint32_t)(*tag & 0xFF);
  56
  57         return vni;
  58 }
  59
  60 static inline int advertise_type5_routes(struct bgp *bgp_vrf,
  61                                          afi_t afi)
  62 {
  63         if (!bgp_vrf->l3vni)
  64                 return 0;
  65
  66         if ((afi == AFI_IP)
  67             && ((CHECK_FLAG(bgp_vrf->af_flags[AFI_L2VPN][SAFI_EVPN],
  68                             BGP_L2VPN_EVPN_ADV_IPV4_UNICAST))
  69                 || (CHECK_FLAG(bgp_vrf->af_flags[AFI_L2VPN][SAFI_EVPN],
  70                                BGP_L2VPN_EVPN_ADV_IPV4_UNICAST_GW_IP))))
  71                 return 1;
  72
  73         if ((afi == AFI_IP6)
  74             && ((CHECK_FLAG(bgp_vrf->af_flags[AFI_L2VPN][SAFI_EVPN],
  75                             BGP_L2VPN_EVPN_ADV_IPV6_UNICAST))
  76                 || (CHECK_FLAG(bgp_vrf->af_flags[AFI_L2VPN][SAFI_EVPN],
  77                                BGP_L2VPN_EVPN_ADV_IPV6_UNICAST_GW_IP))))
  78                 return 1;
  79
  80         return 0;
  81 }
  82
  83 /* Flag if the route's parent is a EVPN route. */
  84 static inline struct bgp_path_info *
  85 get_route_parent_evpn(struct bgp_path_info *ri)
  86 {
  87         struct bgp_path_info *parent_ri;
  88
  89         /* If not imported (or doesn't have a parent), bail. */
  90         if (ri->sub_type != BGP_ROUTE_IMPORTED ||
  91             !ri->extra ||
  92             !ri->extra->parent)
  93                 return NULL;
  94
  95         /* Determine parent recursively */
  96         for (parent_ri = ri->extra->parent;
  97              parent_ri->extra && parent_ri->extra->parent;
  98              parent_ri = parent_ri->extra->parent)
  99                 ;
 100
 101         return parent_ri;
 102 }
 103
 104 /* Flag if the route's parent is a EVPN route. */
 105 static inline int is_route_parent_evpn(struct bgp_path_info *ri)
 106 {
 107         struct bgp_path_info *parent_ri;
 108         struct bgp_table *table;
 109         struct bgp_dest *dest;
 110
 111         parent_ri = get_route_parent_evpn(ri);
 112         if (!parent_ri)
 113                 return 0;
 114
 115         /* See if of family L2VPN/EVPN */
 116         dest = parent_ri->net;
 117         if (!dest)
 118                 return 0;
 119         table = bgp_dest_table(dest);
 120         if (table &&
 121             table->afi == AFI_L2VPN &&
 122             table->safi == SAFI_EVPN)
 123                 return 1;
 124         return 0;
 125 }
 126
 127 /* Flag if the route path's family is EVPN. */
 128 static inline bool is_pi_family_evpn(struct bgp_path_info *pi)
 129 {
 130         return is_pi_family_matching(pi, AFI_L2VPN, SAFI_EVPN);
 131 }
 132
 133 /* Flag if the route is injectable into EVPN. This would be either a
 134  * non-imported route or a non-EVPN imported route.
 135  */
 136 static inline bool is_route_injectable_into_evpn(struct bgp_path_info *pi)
 137 {
 138         struct bgp_path_info *parent_pi;
 139         struct bgp_table *table;
 140         struct bgp_dest *dest;
 141
 142         if (pi->sub_type != BGP_ROUTE_IMPORTED ||
 143             !pi->extra ||
 144             !pi->extra->parent)
 145                 return true;
 146
 147         parent_pi = (struct bgp_path_info *)pi->extra->parent;
 148         dest = parent_pi->net;
 149         if (!dest)
 150                 return true;
 151         table = bgp_dest_table(dest);
 152         if (table &&
 153             table->afi == AFI_L2VPN &&
 154             table->safi == SAFI_EVPN)
 155                 return false;
 156         return true;
 157 }
 158
 159 static inline bool evpn_resolve_overlay_index(void)
 160 {
 161         struct bgp *bgp = NULL;
 162
 163         bgp = bgp_get_evpn();
 164         return bgp ? bgp->resolve_overlay_index : false;
 165 }
 166
 167 extern void bgp_evpn_advertise_type5_route(struct bgp *bgp_vrf,
 168                                            const struct prefix *p,
 169                                            struct attr *src_attr, afi_t afi,
 170                                            safi_t safi);
 171 extern void bgp_evpn_withdraw_type5_route(struct bgp *bgp_vrf,
 172                                           const struct prefix *p, afi_t afi,
 173                                           safi_t safi);
 174 extern void bgp_evpn_withdraw_type5_routes(struct bgp *bgp_vrf, afi_t afi,
 175                                            safi_t safi);
 176 extern void bgp_evpn_advertise_type5_routes(struct bgp *bgp_vrf, afi_t afi,
 177                                             safi_t safi);
 178 extern void bgp_evpn_vrf_delete(struct bgp *bgp_vrf);
 179 extern void bgp_evpn_handle_router_id_update(struct bgp *bgp, int withdraw);
 180 extern char *bgp_evpn_label2str(mpls_label_t *label, uint32_t num_labels,
 181                                 char *buf, int len);
 182 extern void bgp_evpn_route2json(const struct prefix_evpn *p, json_object *json);
 183 extern void bgp_evpn_encode_prefix(struct stream *s, const struct prefix *p,
 184                                    const struct prefix_rd *prd,
 185                                    mpls_label_t *label, uint32_t num_labels,
 186                                    struct attr *attr, bool addpath_capable,
 187                                    uint32_t addpath_tx_id);
 188 extern int bgp_nlri_parse_evpn(struct peer *peer, struct attr *attr,
 189                                struct bgp_nlri *packet, int withdraw);
 190 extern int bgp_evpn_import_route(struct bgp *bgp, afi_t afi, safi_t safi,
 191                                  const struct prefix *p,
 192                                  struct bgp_path_info *ri);
 193 extern int bgp_evpn_unimport_route(struct bgp *bgp, afi_t afi, safi_t safi,
 194                                    const struct prefix *p,
 195                                    struct bgp_path_info *ri);
 196 extern int bgp_filter_evpn_routes_upon_martian_nh_change(struct bgp *bgp);
 197 extern int bgp_evpn_local_macip_del(struct bgp *bgp, vni_t vni,
 198                                     struct ethaddr *mac, struct ipaddr *ip,
 199                                         int state);
 200 extern int bgp_evpn_local_macip_add(struct bgp *bgp, vni_t vni,
 201                                     struct ethaddr *mac, struct ipaddr *ip,
 202                                     uint8_t flags, uint32_t seq, esi_t *esi);
 203 extern int bgp_evpn_local_l3vni_add(vni_t vni, vrf_id_t vrf_id,
 204                                     struct ethaddr *rmac,
 205                                     struct ethaddr *vrr_rmac,
 206                                     struct in_addr originator_ip, int filter,
 207                                     ifindex_t svi_ifindex, bool is_anycast_mac);
 208 extern int bgp_evpn_local_l3vni_del(vni_t vni, vrf_id_t vrf_id);
 209 extern int bgp_evpn_local_vni_del(struct bgp *bgp, vni_t vni);
 210 extern int bgp_evpn_local_vni_add(struct bgp *bgp, vni_t vni,
 211                                   struct in_addr originator_ip,
 212                                   vrf_id_t tenant_vrf_id,
 213                                   struct in_addr mcast_grp,
 214                                   ifindex_t svi_ifindex);
 215 extern void bgp_evpn_flood_control_change(struct bgp *bgp);
 216 extern void bgp_evpn_cleanup_on_disable(struct bgp *bgp);
 217 extern void bgp_evpn_cleanup(struct bgp *bgp);
 218 extern void bgp_evpn_init(struct bgp *bgp);
 219 extern int bgp_evpn_get_type5_prefixlen(const struct prefix *pfx);
 220 extern bool bgp_evpn_is_prefix_nht_supported(const struct prefix *pfx);
 221 extern void update_advertise_vrf_routes(struct bgp *bgp_vrf);
 222 extern void bgp_evpn_show_remote_ip_hash(struct hash_bucket *bucket,
 223                                          void *args);
 224 extern void bgp_evpn_show_vni_svi_hash(struct hash_bucket *bucket, void *args);
 225 extern bool bgp_evpn_is_gateway_ip_resolved(struct bgp_nexthop_cache *bnc);
 226 extern void
 227 bgp_evpn_handle_resolve_overlay_index_set(struct hash_bucket *bucket,
 228                                           void *arg);
 229 extern void
 230 bgp_evpn_handle_resolve_overlay_index_unset(struct hash_bucket *bucket,
 231                                             void *arg);
 232
 233 #endif /* _QUAGGA_BGP_EVPN_H */