bgpd/rfapi/rfapi_import.h

   1 /*
   2  *
   3  * Copyright 2009-2016, LabN Consulting, L.L.C.
   4  *
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU 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 /*
  22  * File:        rfapi_import.h
  23  * Purpose:     Handle import of routes from BGP to RFAPI
  24  */
  25
  26 #ifndef QUAGGA_HGP_RFAPI_IMPORT_H
  27 #define QUAGGA_HGP_RFAPI_IMPORT_H
  28
  29 #include "lib/thread.h"
  30
  31 /*
  32  * These are per-rt-import-list
  33  *
  34  * routes are not segregated by RD - the RD is stored in bgp_info_extra
  35  * and is needed to determine if two prefixes are the same.
  36  */
  37 struct rfapi_import_table
  38 {
  39   struct rfapi_import_table *next;
  40   struct rfapi_nve_group_cfg *rfg;
  41   struct ecommunity *rt_import_list;    /* copied from nve grp */
  42   int refcount;                 /* nve grps and nves */
  43   uint32_t l2_logical_net_id;   /* L2 only: EVPN Eth Seg Id */
  44   struct route_table *imported_vpn[AFI_MAX];
  45   struct rfapi_monitor_vpn *vpn0_queries[AFI_MAX];
  46   struct rfapi_monitor_eth *eth0_queries;
  47   struct route_table *imported_encap[AFI_MAX];
  48   struct skiplist *monitor_exterior_orphans;
  49   int local_count[AFI_MAX];
  50   int remote_count[AFI_MAX];
  51   int holddown_count[AFI_MAX];
  52   int imported_count[AFI_MAX];
  53 };
  54
  55 #define RFAPI_LOCAL_BI(bi) \
  56     (((bi)->type == ZEBRA_ROUTE_BGP) && ((bi)->sub_type == BGP_ROUTE_RFP))
  57
  58 #define RFAPI_DIRECT_IMPORT_BI(bi) \
  59     (((bi)->type ==  ZEBRA_ROUTE_BGP_DIRECT) || ((bi)->type ==  ZEBRA_ROUTE_BGP_DIRECT_EXT))
  60
  61 #define RFAPI_UPDATE_ITABLE_COUNT(bi, itable, afi, cnt) \
  62     if (RFAPI_LOCAL_BI(bi)) {                           \
  63         (itable)->local_count[(afi)] += (cnt);          \
  64     } else {                                            \
  65         if (RFAPI_DIRECT_IMPORT_BI(bi))                 \
  66             (itable)->imported_count[(afi)] += (cnt);   \
  67         else                                            \
  68             (itable)->remote_count[(afi)]   += (cnt);   \
  69     }
  70
  71 extern uint8_t
  72 rfapiRfpCost (struct attr *attr);
  73
  74 extern void
  75 rfapiDebugBacktrace (void);
  76
  77 extern void
  78 rfapiCheckRouteCount (void);
  79
  80 /*
  81  * Print BI in an Import Table
  82  */
  83 extern void
  84 rfapiPrintBi (void *stream, struct bgp_info *bi);
  85
  86 extern void
  87 rfapiShowImportTable (
  88   void                  *stream,
  89   const char            *label,
  90   struct route_table    *rt,
  91   int                   isvpn);
  92
  93 extern struct rfapi_import_table *
  94 rfapiImportTableRefAdd (
  95   struct bgp *bgp,
  96   struct ecommunity *rt_import_list,
  97   struct rfapi_nve_group_cfg *rfg);
  98
  99 extern void
 100 rfapiImportTableRefDelByIt (
 101   struct bgp                    *bgp,
 102   struct rfapi_import_table     *it_target);
 103
 104
 105 /*
 106  * Construct an rfapi nexthop list based on the routes attached to
 107  * the specified node.
 108  *
 109  * If there are any routes that do NOT have BGP_INFO_REMOVED set,
 110  * return those only. If there are ONLY routes with BGP_INFO_REMOVED,
 111  * then return those, and also include all the non-removed routes from the
 112  * next less-specific node (i.e., this node's parent) at the end.
 113  */
 114 extern struct rfapi_next_hop_entry *
 115 rfapiRouteNode2NextHopList (
 116   struct route_node     *rn,
 117   uint32_t              lifetime,               /* put into nexthop entries */
 118   struct rfapi_ip_addr  *exclude_vnaddr,        /* omit routes to same NVE */
 119   struct route_table    *rfd_rib_table,         /* preload this NVE rib table */
 120   struct prefix         *pfx_target_original);  /* query target */
 121
 122 extern struct rfapi_next_hop_entry *
 123 rfapiRouteTable2NextHopList (
 124   struct route_table    *rt,
 125   uint32_t              lifetime,               /* put into nexthop entries */
 126   struct rfapi_ip_addr  *exclude_vnaddr,        /* omit routes to same NVE */
 127   struct route_table    *rfd_rib_table,         /* preload this NVE rib table */
 128   struct prefix         *pfx_target_original);  /* query target */
 129
 130 extern struct rfapi_next_hop_entry *
 131 rfapiEthRouteTable2NextHopList (
 132   uint32_t                      logical_net_id,
 133   struct rfapi_ip_prefix        *rprefix,
 134   uint32_t                      lifetime,        /* put into nexthop entries */
 135   struct rfapi_ip_addr          *exclude_vnaddr, /* omit routes to same NVE */
 136   struct route_table            *rib_route_table,/* preload NVE rib node */
 137   struct prefix                 *pfx_target_original);  /* query target */
 138
 139 extern int
 140 rfapiEcommunitiesIntersect (struct ecommunity *e1, struct ecommunity *e2);
 141
 142 extern void
 143 rfapiCheckRefcount (struct route_node *rn, safi_t safi, int lockoffset);
 144
 145 extern int
 146 rfapiHasNonRemovedRoutes (struct route_node *rn);
 147
 148 extern int
 149 rfapiProcessDeferredClose (struct thread *t);
 150
 151 extern int
 152 rfapiGetUnAddrOfVpnBi (struct bgp_info *bi, struct prefix *p);
 153
 154 extern void
 155 rfapiNexthop2Prefix (struct attr *attr, struct prefix *p);
 156
 157 extern void
 158 rfapiUnicastNexthop2Prefix (
 159   afi_t         afi,
 160   struct attr   *attr,
 161   struct prefix *p);
 162
 163 /* Filtered Import Function actions */
 164 #define FIF_ACTION_UPDATE       0
 165 #define FIF_ACTION_WITHDRAW     1
 166 #define FIF_ACTION_KILL         2
 167
 168 extern void
 169 rfapiBgpInfoFilteredImportVPN (
 170   struct rfapi_import_table     *import_table,
 171   int                           action,
 172   struct peer                   *peer,
 173   void                          *rfd,           /* set for looped back routes */
 174   struct prefix                 *p,
 175   struct prefix                 *aux_prefix,    /* AFI_ETHER: optional IP */
 176   afi_t                         afi,
 177   struct prefix_rd              *prd,
 178   struct attr                   *attr,          /* part of bgp_info */
 179   u_char                        type,           /* part of bgp_info */
 180   u_char                        sub_type,       /* part of bgp_info */
 181   uint32_t                      *label);        /* part of bgp_info */
 182
 183 extern struct rfapi_next_hop_entry *
 184 rfapiEthRouteNode2NextHopList (
 185   struct route_node             *rn,
 186   struct rfapi_ip_prefix        *rprefix,
 187   uint32_t                      lifetime,        /* put into nexthop entries */
 188   struct rfapi_ip_addr          *exclude_vnaddr, /* omit routes to same NVE */
 189   struct route_table            *rib_route_table,/* preload NVE rib table */
 190   struct prefix                 *pfx_target_original); /* query target */
 191
 192 extern struct rfapi_import_table *
 193 rfapiMacImportTableGetNoAlloc (
 194   struct bgp    *bgp,
 195   uint32_t      lni);
 196
 197 extern struct rfapi_import_table *
 198 rfapiMacImportTableGet (
 199   struct bgp    *bgp,
 200   uint32_t      lni);
 201
 202 extern int
 203 rfapiGetL2o (
 204   struct attr                   *attr,
 205   struct rfapi_l2address_option *l2o);
 206
 207 extern int rfapiEcommunityGetLNI (
 208   struct ecommunity     *ecom,
 209   uint32_t              *lni);
 210
 211 extern int rfapiEcommunityGetEthernetTag (
 212   struct ecommunity *ecom,
 213   uint16_t * tag_id);
 214
 215 /* enable for debugging; disable for performance */
 216 #if 0
 217 #define RFAPI_CHECK_REFCOUNT(rn, safi, lo) rfapiCheckRefcount((rn),(safi),(lo))
 218 #else
 219 #define RFAPI_CHECK_REFCOUNT(rn, safi, lo) {}
 220 #endif
 221
 222 /*------------------------------------------
 223  * rfapiDeleteRemotePrefixes
 224  *
 225  * UI helper: For use by the "clear vnc prefixes" command
 226  *
 227  * input:
 228  *      un                      if set, tunnel must match this prefix
 229  *      vn                      if set, nexthop prefix must match this prefix
 230  *      p                       if set, prefix must match this prefix
 231  *      it                      if set, only look in this import table
 232  *
 233  * output
 234  *      pARcount                number of active routes deleted
 235  *      pAHcount                number of active nves deleted
 236  *      pHRcount                number of holddown routes deleted
 237  *      pHHcount                number of holddown nves deleted
 238  *
 239  * return value:
 240  *      void
 241  --------------------------------------------*/
 242 extern void
 243 rfapiDeleteRemotePrefixes (
 244   struct prefix *un,
 245   struct prefix *vn,
 246   struct prefix *p,
 247   struct rfapi_import_table *it,
 248   int           delete_active,
 249   int           delete_holddown,
 250   uint32_t      *pARcount,     /* active routes */
 251   uint32_t      *pAHcount,     /* active nves */
 252   uint32_t      *pHRcount,     /* holddown routes */
 253   uint32_t      *pHHcount);    /* holddown nves */
 254
 255 /*------------------------------------------
 256  * rfapiCountAllItRoutes
 257  *
 258  * UI helper: count VRF routes from BGP side
 259  *
 260  * input:
 261  *
 262  * output
 263  *      pARcount                count of active routes
 264  *      pHRcount                count of holddown routes
 265  *      pIRcount                count of holddown routes
 266  *
 267  * return value:
 268  *      void
 269  --------------------------------------------*/
 270 extern void
 271 rfapiCountAllItRoutes (
 272   int *pALRcount,      /* active local routes */
 273   int *pARRcount,      /* active remote routes */
 274   int *pHRcount,       /* holddown routes */
 275   int *pIRcount);      /* direct imported routes */
 276
 277 /*------------------------------------------
 278  * rfapiGetHolddownFromLifetime
 279  *
 280  * calculate holddown value based on lifetime
 281  *
 282  * input:
 283  *     lifetime                lifetime
 284  *
 285  * return value:
 286  *     Holddown value based on lifetime, holddown_factor,
 287  *     and RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY
 288  *
 289  --------------------------------------------*/
 290 extern uint32_t
 291 rfapiGetHolddownFromLifetime (uint32_t lifetime);
 292
 293 #endif /* QUAGGA_HGP_RFAPI_IMPORT_H */