bgpd/bgp_evpn_private.h

   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
  31 /* EVPN prefix lengths. */
  32 #define EVPN_TYPE_2_ROUTE_PREFIXLEN      224
  33 #define EVPN_TYPE_3_ROUTE_PREFIXLEN      224
  34
  35 /* EVPN route types. */
  36 typedef enum
  37 {
  38   BGP_EVPN_AD_ROUTE = 1,          /* Ethernet Auto-Discovery (A-D) route */
  39   BGP_EVPN_MAC_IP_ROUTE,          /* MAC/IP Advertisement route */
  40   BGP_EVPN_IMET_ROUTE,            /* Inclusive Multicast Ethernet Tag route */
  41   BGP_EVPN_ES_ROUTE,              /* Ethernet Segment route */
  42   BGP_EVPN_IP_PREFIX_ROUTE,       /* IP Prefix route */
  43 } bgp_evpn_route_type;
  44
  45 /*
  46  * Hash table of EVIs. Right now, the only type of EVI supported is with
  47  * VxLAN encapsulation, hence each EVI corresponds to a L2 VNI.
  48  * The VNIs are not "created" through BGP but through some other interface
  49  * on the system. This table stores VNIs that BGP comes to know as present
  50  * on the system (through interaction with zebra) as well as pre-configured
  51  * VNIs (which need to be defined in the system to become "live").
  52  */
  53 struct bgpevpn
  54 {
  55   vni_t                     vni;
  56   u_int32_t                 flags;
  57 #define VNI_FLAG_CFGD              0x1  /* VNI is user configured */
  58 #define VNI_FLAG_LIVE              0x2  /* VNI is "live" */
  59 #define VNI_FLAG_RD_CFGD           0x4  /* RD is user configured. */
  60 #define VNI_FLAG_IMPRT_CFGD        0x8  /* Import RT is user configured */
  61 #define VNI_FLAG_EXPRT_CFGD        0x10 /* Export RT is user configured */
  62
  63   /* Id for deriving the RD automatically for this VNI */
  64   u_int16_t                 rd_id;
  65
  66   /* RD for this VNI. */
  67   struct prefix_rd          prd;
  68
  69   /* Route type 3 field */
  70   struct in_addr            originator_ip;
  71
  72   /* Import and Export RTs. */
  73   struct list               *import_rtl;
  74   struct list               *export_rtl;
  75
  76   /* Route table for EVPN routes for this VNI. */
  77   struct bgp_table          *route_table;
  78
  79   QOBJ_FIELDS
  80 };
  81
  82 DECLARE_QOBJ_TYPE(bgpevpn)
  83
  84 /* Mapping of Import RT to VNIs.
  85  * The Import RTs of all VNIs are maintained in a hash table with each
  86  * RT linking to all VNIs that will import routes matching this RT.
  87  */
  88 struct irt_node
  89 {
  90   /* RT */
  91   struct ecommunity_val rt;
  92
  93   /* List of VNIs importing routes matching this RT. */
  94   struct list *vnis;
  95 };
  96
  97 #endif /* _BGP_EVPN_PRIVATE_H */