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_ADVERTISE_IPV4_UNICAST))
  69                 return 1;
  70
  71         if (afi == AFI_IP6 &&
  72             CHECK_FLAG(bgp_vrf->af_flags[AFI_L2VPN][SAFI_EVPN],
  73                        BGP_L2VPN_EVPN_ADVERTISE_IPV6_UNICAST))
  74                 return 1;
  75
  76         return 0;
  77 }
  78
  79 /* Flag if the route's parent is a EVPN route. */
  80 static inline struct bgp_path_info *
  81 get_route_parent_evpn(struct bgp_path_info *ri)
  82 {
  83         struct bgp_path_info *parent_ri;
  84
  85         /* If not imported (or doesn't have a parent), bail. */
  86         if (ri->sub_type != BGP_ROUTE_IMPORTED ||
  87             !ri->extra ||
  88             !ri->extra->parent)
  89                 return NULL;
  90
  91         /* Determine parent recursively */
  92         for (parent_ri = ri->extra->parent;
  93              parent_ri->extra && parent_ri->extra->parent;
  94              parent_ri = parent_ri->extra->parent)
  95                 ;
  96
  97         return parent_ri;
  98 }
  99
 100 /* Flag if the route's parent is a EVPN route. */
 101 static inline int is_route_parent_evpn(struct bgp_path_info *ri)
 102 {
 103         struct bgp_path_info *parent_ri;
 104         struct bgp_table *table;
 105         struct bgp_dest *dest;
 106
 107         parent_ri = get_route_parent_evpn(ri);
 108         if (!parent_ri)
 109                 return 0;
 110
 111         /* See if of family L2VPN/EVPN */
 112         dest = parent_ri->net;
 113         if (!dest)
 114                 return 0;
 115         table = bgp_dest_table(dest);
 116         if (table &&
 117             table->afi == AFI_L2VPN &&
 118             table->safi == SAFI_EVPN)
 119                 return 1;
 120         return 0;
 121 }
 122
 123 /* Flag if the route path's family is EVPN. */
 124 static inline bool is_pi_family_evpn(struct bgp_path_info *pi)
 125 {
 126         return is_pi_family_matching(pi, AFI_L2VPN, SAFI_EVPN);
 127 }
 128
 129 /* Flag if the route is injectable into EVPN. This would be either a
 130  * non-imported route or a non-EVPN imported route.
 131  */
 132 static inline bool is_route_injectable_into_evpn(struct bgp_path_info *pi)
 133 {
 134         struct bgp_path_info *parent_pi;
 135         struct bgp_table *table;
 136         struct bgp_dest *dest;
 137
 138         if (pi->sub_type != BGP_ROUTE_IMPORTED ||
 139             !pi->extra ||
 140             !pi->extra->parent)
 141                 return true;
 142
 143         parent_pi = (struct bgp_path_info *)pi->extra->parent;
 144         dest = parent_pi->net;
 145         if (!dest)
 146                 return true;
 147         table = bgp_dest_table(dest);
 148         if (table &&
 149             table->afi == AFI_L2VPN &&
 150             table->safi == SAFI_EVPN)
 151                 return false;
 152         return true;
 153 }
 154
 155 extern void bgp_evpn_advertise_type5_route(struct bgp *bgp_vrf,
 156                                            const struct prefix *p,
 157                                            struct attr *src_attr, afi_t afi,
 158                                            safi_t safi);
 159 extern void bgp_evpn_withdraw_type5_route(struct bgp *bgp_vrf,
 160                                           const struct prefix *p, afi_t afi,
 161                                           safi_t safi);
 162 extern void bgp_evpn_withdraw_type5_routes(struct bgp *bgp_vrf, afi_t afi,
 163                                            safi_t safi);
 164 extern void bgp_evpn_advertise_type5_routes(struct bgp *bgp_vrf, afi_t afi,
 165                                             safi_t safi);
 166 extern void bgp_evpn_vrf_delete(struct bgp *bgp_vrf);
 167 extern void bgp_evpn_handle_router_id_update(struct bgp *bgp, int withdraw);
 168 extern char *bgp_evpn_label2str(mpls_label_t *label, uint32_t num_labels,
 169                                 char *buf, int len);
 170 extern void bgp_evpn_route2json(const struct prefix_evpn *p, json_object *json);
 171 extern void bgp_evpn_encode_prefix(struct stream *s, const struct prefix *p,
 172                                    const struct prefix_rd *prd,
 173                                    mpls_label_t *label, uint32_t num_labels,
 174                                    struct attr *attr, int addpath_encode,
 175                                    uint32_t addpath_tx_id);
 176 extern int bgp_nlri_parse_evpn(struct peer *peer, struct attr *attr,
 177                                struct bgp_nlri *packet, int withdraw);
 178 extern int bgp_evpn_import_route(struct bgp *bgp, afi_t afi, safi_t safi,
 179                                  const struct prefix *p,
 180                                  struct bgp_path_info *ri);
 181 extern int bgp_evpn_unimport_route(struct bgp *bgp, afi_t afi, safi_t safi,
 182                                    const struct prefix *p,
 183                                    struct bgp_path_info *ri);
 184 extern int bgp_filter_evpn_routes_upon_martian_nh_change(struct bgp *bgp);
 185 extern int bgp_evpn_local_macip_del(struct bgp *bgp, vni_t vni,
 186                                     struct ethaddr *mac, struct ipaddr *ip,
 187                                         int state);
 188 extern int bgp_evpn_local_macip_add(struct bgp *bgp, vni_t vni,
 189                                     struct ethaddr *mac, struct ipaddr *ip,
 190                                     uint8_t flags, uint32_t seq, esi_t *esi);
 191 extern int bgp_evpn_local_l3vni_add(vni_t vni, vrf_id_t vrf_id,
 192                                     struct ethaddr *rmac,
 193                                     struct ethaddr *vrr_rmac,
 194                                     struct in_addr originator_ip, int filter,
 195                                     ifindex_t svi_ifindex, bool is_anycast_mac);
 196 extern int bgp_evpn_local_l3vni_del(vni_t vni, vrf_id_t vrf_id);
 197 extern int bgp_evpn_local_vni_del(struct bgp *bgp, vni_t vni);
 198 extern int bgp_evpn_local_vni_add(struct bgp *bgp, vni_t vni,
 199                                   struct in_addr originator_ip,
 200                                   vrf_id_t tenant_vrf_id,
 201                                   struct in_addr mcast_grp);
 202 extern void bgp_evpn_flood_control_change(struct bgp *bgp);
 203 extern void bgp_evpn_cleanup_on_disable(struct bgp *bgp);
 204 extern void bgp_evpn_cleanup(struct bgp *bgp);
 205 extern void bgp_evpn_init(struct bgp *bgp);
 206 extern int bgp_evpn_get_type5_prefixlen(const struct prefix *pfx);
 207 extern bool bgp_evpn_is_prefix_nht_supported(const struct prefix *pfx);
 208 extern void update_advertise_vrf_routes(struct bgp *bgp_vrf);
 209
 210 #endif /* _QUAGGA_BGP_EVPN_H */