bgpd/bgpd.h

   1 /* BGP message definition header.
   2    Copyright (C) 1996, 97, 98, 99, 2000 Kunihiro Ishiguro
   3
   4 This file is part of GNU Zebra.
   5
   6 GNU Zebra 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 GNU Zebra 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 GNU Zebra; 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 #ifndef _QUAGGA_BGPD_H
  22 #define _QUAGGA_BGPD_H
  23
  24 #include "qobj.h"
  25 #include "lib/json.h"
  26 #include "vrf.h"
  27
  28 /* For union sockunion.  */
  29 #include "queue.h"
  30 #include "sockunion.h"
  31 #include "routemap.h"
  32 #include "linklist.h"
  33 #include "bgp_memory.h"
  34
  35 #define BGP_MAX_HOSTNAME 64     /* Linux max, is larger than most other sys */
  36
  37 /* Default interval for IPv6 RAs when triggered by BGP unnumbered neighbor. */
  38 #define BGP_UNNUM_DEFAULT_RA_INTERVAL 10
  39
  40 struct update_subgroup;
  41 struct bpacket;
  42
  43 /*
  44  * Allow the neighbor XXXX remote-as to take internal or external
  45  * AS_SPECIFIED is zero to auto-inherit original non-feature/enhancement behavior
  46  * in the system.
  47  */
  48 enum {
  49   AS_UNSPECIFIED = 0,
  50   AS_SPECIFIED,
  51   AS_INTERNAL,
  52   AS_EXTERNAL,
  53 };
  54
  55 /* Typedef BGP specific types.  */
  56 typedef u_int32_t as_t;
  57 typedef u_int16_t as16_t; /* we may still encounter 16 Bit asnums */
  58 typedef u_int16_t bgp_size_t;
  59
  60 #define max(a,b)                \
  61   ({ __typeof__ (a) _a = (a);   \
  62     __typeof__ (b) _b = (b);    \
  63     _a > _b ? _a : _b; })
  64
  65 enum bgp_af_index
  66 {
  67   BGP_AF_START,
  68   BGP_AF_IPV4_UNICAST = BGP_AF_START,
  69   BGP_AF_IPV4_MULTICAST,
  70   BGP_AF_IPV4_VPN,
  71   BGP_AF_IPV6_UNICAST,
  72   BGP_AF_IPV6_MULTICAST,
  73   BGP_AF_IPV6_VPN,
  74   BGP_AF_IPV4_ENCAP,
  75   BGP_AF_IPV6_ENCAP,
  76   BGP_AF_L2VPN_EVPN,
  77   BGP_AF_MAX
  78 };
  79
  80 #define AF_FOREACH(af) \
  81   for ((af) = BGP_AF_START; (af) < BGP_AF_MAX; (af)++)
  82
  83 #define FOREACH_AFI_SAFI(afi, safi)                     \
  84   for (afi = AFI_IP; afi < AFI_MAX; afi++)              \
  85     for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++)
  86
  87 /* BGP master for system wide configurations and variables.  */
  88 struct bgp_master
  89 {
  90   /* BGP instance list.  */
  91   struct list *bgp;
  92
  93   /* BGP thread master.  */
  94   struct thread_master *master;
  95
  96   /* work queues */
  97   struct work_queue *process_main_queue;
  98
  99   /* Listening sockets */
 100   struct list *listen_sockets;
 101
 102   /* BGP port number.  */
 103   u_int16_t port;
 104
 105   /* Listener address */
 106   char *address;
 107
 108   /* BGP start time.  */
 109   time_t start_time;
 110
 111   /* Various BGP global configuration.  */
 112   u_char options;
 113 #define BGP_OPT_NO_FIB                   (1 << 0)
 114 #define BGP_OPT_MULTIPLE_INSTANCE        (1 << 1)
 115 #define BGP_OPT_CONFIG_CISCO             (1 << 2)
 116 #define BGP_OPT_NO_LISTEN                (1 << 3)
 117
 118   uint64_t updgrp_idspace;
 119   uint64_t subgrp_idspace;
 120
 121   /* timer to dampen route map changes */
 122   struct thread *t_rmap_update;   /* Handle route map updates */
 123   u_int32_t rmap_update_timer;    /* Route map update timer */
 124 #define RMAP_DEFAULT_UPDATE_TIMER 5 /* disabled by default */
 125
 126   QOBJ_FIELDS
 127 };
 128 DECLARE_QOBJ_TYPE(bgp_master)
 129
 130 /* BGP route-map structure.  */
 131 struct bgp_rmap
 132 {
 133   char *name;
 134   struct route_map *map;
 135 };
 136
 137 struct bgp_redist
 138 {
 139   u_short instance;
 140
 141   /* BGP redistribute metric configuration. */
 142   u_char redist_metric_flag;
 143   u_int32_t redist_metric;
 144
 145   /* BGP redistribute route-map.  */
 146   struct bgp_rmap rmap;
 147 };
 148
 149 /*
 150  * Type of 'struct bgp'.
 151  * - Default: The default instance
 152  * - VRF: A specific (non-default) VRF
 153  * - View: An instance used for route exchange
 154  * The "default" instance is treated separately to simplify the code. Note
 155  * that if deployed in a Multi-VRF environment, it may not exist.
 156  */
 157 enum bgp_instance_type
 158 {
 159   BGP_INSTANCE_TYPE_DEFAULT,
 160   BGP_INSTANCE_TYPE_VRF,
 161   BGP_INSTANCE_TYPE_VIEW
 162 };
 163
 164 /* BGP instance structure.  */
 165 struct bgp
 166 {
 167   /* AS number of this BGP instance.  */
 168   as_t as;
 169
 170   /* Name of this BGP instance.  */
 171   char *name;
 172
 173   /* Type of instance and VRF id. */
 174   enum bgp_instance_type inst_type;
 175   vrf_id_t vrf_id;
 176
 177   /* Reference count to allow peer_delete to finish after bgp_delete */
 178   int lock;
 179
 180   /* Self peer.  */
 181   struct peer *peer_self;
 182
 183   /* BGP peer. */
 184   struct list *peer;
 185   struct hash *peerhash;
 186
 187   /* BGP peer group.  */
 188   struct list *group;
 189
 190   /* The maximum number of BGP dynamic neighbors that can be created */
 191   int dynamic_neighbors_limit;
 192
 193     /* The current number of BGP dynamic neighbors */
 194   int dynamic_neighbors_count;
 195
 196   struct hash *update_groups[BGP_AF_MAX];
 197
 198   /*
 199    * Global statistics for update groups.
 200    */
 201   struct {
 202     u_int32_t join_events;
 203     u_int32_t prune_events;
 204     u_int32_t merge_events;
 205     u_int32_t split_events;
 206     u_int32_t updgrp_switch_events;
 207     u_int32_t peer_refreshes_combined;
 208     u_int32_t adj_count;
 209     u_int32_t merge_checks_triggered;
 210
 211     u_int32_t updgrps_created;
 212     u_int32_t updgrps_deleted;
 213     u_int32_t subgrps_created;
 214     u_int32_t subgrps_deleted;
 215   } update_group_stats;
 216
 217   /* BGP configuration.  */
 218   u_int16_t config;
 219 #define BGP_CONFIG_CLUSTER_ID             (1 << 0)
 220 #define BGP_CONFIG_CONFEDERATION          (1 << 1)
 221
 222   /* BGP router identifier.  */
 223   struct in_addr router_id;
 224   struct in_addr router_id_static;
 225   struct in_addr router_id_zebra;
 226
 227   /* BGP route reflector cluster ID.  */
 228   struct in_addr cluster_id;
 229
 230   /* BGP confederation information.  */
 231   as_t confed_id;
 232   as_t *confed_peers;
 233   int confed_peers_cnt;
 234
 235   struct thread *t_startup; /* start-up timer on only once at the beginning */
 236
 237   u_int32_t v_maxmed_onstartup; /* Duration of max-med on start-up */
 238 #define BGP_MAXMED_ONSTARTUP_UNCONFIGURED  0 /* 0 means off, its the default */
 239   u_int32_t maxmed_onstartup_value; /* Max-med value when active on start-up */
 240   struct thread *t_maxmed_onstartup; /* non-null when max-med onstartup is on */
 241   u_char    maxmed_onstartup_over; /* Flag to make it effective only once */
 242
 243   u_char    v_maxmed_admin; /* 1/0 if max-med administrative is on/off */
 244 #define BGP_MAXMED_ADMIN_UNCONFIGURED  0 /* Off by default */
 245   u_int32_t maxmed_admin_value; /* Max-med value when administrative in on */
 246 #define BGP_MAXMED_VALUE_DEFAULT  4294967294 /* Maximum by default */
 247
 248   u_char    maxmed_active; /* 1/0 if max-med is active or not */
 249   u_int32_t maxmed_value; /* Max-med value when its active */
 250
 251   /* BGP update delay on startup */
 252   struct thread *t_update_delay;
 253   struct thread *t_establish_wait;
 254   u_char update_delay_over;
 255   u_char main_zebra_update_hold;
 256   u_char main_peers_update_hold;
 257   u_int16_t v_update_delay;
 258   u_int16_t v_establish_wait;
 259   char update_delay_begin_time[64];
 260   char update_delay_end_time[64];
 261   char update_delay_zebra_resume_time[64];
 262   char update_delay_peers_resume_time[64];
 263   u_int32_t established;
 264   u_int32_t restarted_peers;
 265   u_int32_t implicit_eors;
 266   u_int32_t explicit_eors;
 267 #define BGP_UPDATE_DELAY_DEF              0
 268 #define BGP_UPDATE_DELAY_MIN              0
 269 #define BGP_UPDATE_DELAY_MAX              3600
 270
 271   /* BGP flags. */
 272   u_int32_t flags;
 273 #define BGP_FLAG_ALWAYS_COMPARE_MED       (1 << 0)
 274 #define BGP_FLAG_DETERMINISTIC_MED        (1 << 1)
 275 #define BGP_FLAG_MED_MISSING_AS_WORST     (1 << 2)
 276 #define BGP_FLAG_MED_CONFED               (1 << 3)
 277 #define BGP_FLAG_NO_DEFAULT_IPV4          (1 << 4)
 278 #define BGP_FLAG_NO_CLIENT_TO_CLIENT      (1 << 5)
 279 #define BGP_FLAG_ENFORCE_FIRST_AS         (1 << 6)
 280 #define BGP_FLAG_COMPARE_ROUTER_ID        (1 << 7)
 281 #define BGP_FLAG_ASPATH_IGNORE            (1 << 8)
 282 #define BGP_FLAG_IMPORT_CHECK             (1 << 9)
 283 #define BGP_FLAG_NO_FAST_EXT_FAILOVER     (1 << 10)
 284 #define BGP_FLAG_LOG_NEIGHBOR_CHANGES     (1 << 11)
 285 #define BGP_FLAG_GRACEFUL_RESTART         (1 << 12)
 286 #define BGP_FLAG_ASPATH_CONFED            (1 << 13)
 287 #define BGP_FLAG_ASPATH_MULTIPATH_RELAX   (1 << 14)
 288 #define BGP_FLAG_RR_ALLOW_OUTBOUND_POLICY (1 << 15)
 289 #define BGP_FLAG_DISABLE_NH_CONNECTED_CHK (1 << 16)
 290 #define BGP_FLAG_MULTIPATH_RELAX_AS_SET   (1 << 17)
 291 #define BGP_FLAG_FORCE_STATIC_PROCESS     (1 << 18)
 292 #define BGP_FLAG_SHOW_HOSTNAME            (1 << 19)
 293 #define BGP_FLAG_GR_PRESERVE_FWD          (1 << 20)
 294
 295   /* BGP Per AF flags */
 296   u_int16_t af_flags[AFI_MAX][SAFI_MAX];
 297 #define BGP_CONFIG_DAMPENING              (1 << 0)
 298
 299   /* Route table for next-hop lookup cache. */
 300   struct bgp_table *nexthop_cache_table[AFI_MAX];
 301
 302   /* Route table for import-check */
 303   struct bgp_table *import_check_table[AFI_MAX];
 304
 305   struct bgp_table *connected_table[AFI_MAX];
 306
 307   struct hash *address_hash;
 308
 309   /* Static route configuration.  */
 310   struct bgp_table *route[AFI_MAX][SAFI_MAX];
 311
 312   /* Aggregate address configuration.  */
 313   struct bgp_table *aggregate[AFI_MAX][SAFI_MAX];
 314
 315   /* BGP routing information base.  */
 316   struct bgp_table *rib[AFI_MAX][SAFI_MAX];
 317
 318   /* BGP table route-map.  */
 319   struct bgp_rmap table_map[AFI_MAX][SAFI_MAX];
 320
 321   /* BGP redistribute configuration. */
 322   struct list *redist[AFI_MAX][ZEBRA_ROUTE_MAX];
 323
 324   /* timer to re-evaluate neighbor default-originate route-maps */
 325   struct thread *t_rmap_def_originate_eval;
 326 #define RMAP_DEFAULT_ORIGINATE_EVAL_TIMER 5
 327
 328   /* BGP distance configuration.  */
 329   u_char distance_ebgp[AFI_MAX][SAFI_MAX];
 330   u_char distance_ibgp[AFI_MAX][SAFI_MAX];
 331   u_char distance_local[AFI_MAX][SAFI_MAX];
 332
 333   /* BGP default local-preference.  */
 334   u_int32_t default_local_pref;
 335
 336   /* BGP default subgroup pkt queue max  */
 337   u_int32_t default_subgroup_pkt_queue_max;
 338
 339   /* BGP default timer.  */
 340   u_int32_t default_holdtime;
 341   u_int32_t default_keepalive;
 342
 343   /* BGP graceful restart */
 344   u_int32_t restart_time;
 345   u_int32_t stalepath_time;
 346
 347   /* Maximum-paths configuration */
 348   struct bgp_maxpaths_cfg {
 349     u_int16_t maxpaths_ebgp;
 350     u_int16_t maxpaths_ibgp;
 351     u_int16_t ibgp_flags;
 352 #define BGP_FLAG_IBGP_MULTIPATH_SAME_CLUSTERLEN (1 << 0)
 353   } maxpaths[AFI_MAX][SAFI_MAX];
 354
 355   u_int32_t wpkt_quanta;  /* per peer packet quanta to write */
 356   u_int32_t coalesce_time;
 357
 358   u_int32_t addpath_tx_id;
 359   int addpath_tx_used[AFI_MAX][SAFI_MAX];
 360
 361 #if ENABLE_BGP_VNC
 362   struct rfapi_cfg *rfapi_cfg;
 363   struct rfapi *rfapi;
 364 #endif
 365
 366   QOBJ_FIELDS
 367 };
 368 DECLARE_QOBJ_TYPE(bgp)
 369
 370 #define BGP_ROUTE_ADV_HOLD(bgp) (bgp->main_peers_update_hold)
 371
 372 #define IS_BGP_INST_KNOWN_TO_ZEBRA(bgp) \
 373         (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT || \
 374          (bgp->inst_type == BGP_INSTANCE_TYPE_VRF && bgp->vrf_id != VRF_UNKNOWN))
 375
 376 /* BGP peer-group support. */
 377 struct peer_group
 378 {
 379   /* Name of the peer-group. */
 380   char *name;
 381
 382   /* Pointer to BGP.  */
 383   struct bgp *bgp;
 384
 385   /* Peer-group client list. */
 386   struct list *peer;
 387
 388   /** Dynamic neighbor listening ranges */
 389   struct list *listen_range[AFI_MAX];
 390
 391   /* Peer-group config */
 392   struct peer *conf;
 393 };
 394
 395 /* BGP Notify message format. */
 396 struct bgp_notify
 397 {
 398   u_char code;
 399   u_char subcode;
 400   char *data;
 401   bgp_size_t length;
 402 };
 403
 404 /* Next hop self address. */
 405 struct bgp_nexthop
 406 {
 407   struct interface *ifp;
 408   struct in_addr v4;
 409   struct in6_addr v6_global;
 410   struct in6_addr v6_local;
 411 };
 412
 413 /* BGP addpath values */
 414 #define BGP_ADDPATH_RX     1
 415 #define BGP_ADDPATH_TX     2
 416 #define BGP_ADDPATH_ID_LEN 4
 417
 418 #define BGP_ADDPATH_TX_ID_FOR_DEFAULT_ORIGINATE 1
 419
 420 /* BGP router distinguisher value.  */
 421 #define BGP_RD_SIZE                8
 422
 423 struct bgp_rd
 424 {
 425   u_char val[BGP_RD_SIZE];
 426 };
 427
 428 #define RMAP_IN  0
 429 #define RMAP_OUT 1
 430 #define RMAP_MAX 2
 431
 432 #include "filter.h"
 433
 434 /* BGP filter structure. */
 435 struct bgp_filter
 436 {
 437   /* Distribute-list.  */
 438   struct
 439   {
 440     char *name;
 441     struct access_list *alist;
 442   } dlist[FILTER_MAX];
 443
 444   /* Prefix-list.  */
 445   struct
 446   {
 447     char *name;
 448     struct prefix_list *plist;
 449   } plist[FILTER_MAX];
 450
 451   /* Filter-list.  */
 452   struct
 453   {
 454     char *name;
 455     struct as_list *aslist;
 456   } aslist[FILTER_MAX];
 457
 458   /* Route-map.  */
 459   struct
 460   {
 461     char *name;
 462     struct route_map *map;
 463   } map[RMAP_MAX];
 464
 465   /* Unsuppress-map.  */
 466   struct
 467   {
 468     char *name;
 469     struct route_map *map;
 470   } usmap;
 471 };
 472
 473 /* IBGP/EBGP identifier.  We also have a CONFED peer, which is to say,
 474    a peer who's AS is part of our Confederation.  */
 475 typedef enum
 476 {
 477   BGP_PEER_IBGP = 1,
 478   BGP_PEER_EBGP,
 479   BGP_PEER_INTERNAL,
 480   BGP_PEER_CONFED,
 481 } bgp_peer_sort_t;
 482
 483 /* BGP message header and packet size.  */
 484 #define BGP_MARKER_SIZE                         16
 485 #define BGP_HEADER_SIZE                         19
 486 #define BGP_MAX_PACKET_SIZE                   4096
 487 #define BGP_MAX_PACKET_SIZE_OVERFLOW          1024
 488
 489 /*
 490  * Trigger delay for bgp_announce_route().
 491  */
 492 #define BGP_ANNOUNCE_ROUTE_SHORT_DELAY_MS  100
 493 #define BGP_ANNOUNCE_ROUTE_DELAY_MS        500
 494
 495 struct peer_af
 496 {
 497   /* back pointer to the peer */
 498   struct peer *peer;
 499
 500   /* which subgroup the peer_af belongs to */
 501   struct update_subgroup *subgroup;
 502
 503   /* for being part of an update subgroup's peer list */
 504   LIST_ENTRY(peer_af) subgrp_train;
 505
 506   /* for being part of a packet's peer list */
 507   LIST_ENTRY(peer_af) pkt_train;
 508
 509   struct bpacket *next_pkt_to_send;
 510
 511   /*
 512    * Trigger timer for bgp_announce_route().
 513    */
 514   struct thread *t_announce_route;
 515
 516   afi_t afi;
 517   safi_t safi;
 518   int afid;
 519 };
 520
 521 /* BGP neighbor structure. */
 522 struct peer
 523 {
 524   /* BGP structure.  */
 525   struct bgp *bgp;
 526
 527   /* reference count, primarily to allow bgp_process'ing of route_node's
 528    * to be done after a struct peer is deleted.
 529    *
 530    * named 'lock' for hysterical reasons within Quagga.
 531    */
 532   int lock;
 533
 534   /* BGP peer group.  */
 535   struct peer_group *group;
 536   uint64_t version[AFI_MAX][SAFI_MAX];
 537
 538   /* BGP peer_af structures, per configured AF on this peer */
 539   struct peer_af *peer_af_array[BGP_AF_MAX];
 540
 541   /* Peer's remote AS number. */
 542   int as_type;
 543   as_t as;
 544
 545   /* Peer's local AS number. */
 546   as_t local_as;
 547
 548   bgp_peer_sort_t sort;
 549
 550   /* Peer's Change local AS number. */
 551   as_t change_local_as;
 552
 553   /* Remote router ID. */
 554   struct in_addr remote_id;
 555
 556   /* Local router ID. */
 557   struct in_addr local_id;
 558
 559   /* Packet receive and send buffer. */
 560   struct stream *ibuf;
 561   struct stream_fifo *obuf;
 562   struct stream *work;
 563
 564   /* We use a separate stream to encode MP_REACH_NLRI for efficient
 565    * NLRI packing. peer->work stores all the other attributes. The
 566    * actual packet is then constructed by concatenating the two.
 567    */
 568   struct stream *scratch;
 569
 570   /* the doppelganger peer structure, due to dual TCP conn setup */
 571   struct peer *doppelganger;
 572
 573   /* Status of the peer. */
 574   int status;
 575   int ostatus;
 576
 577   /* FSM events, stored for debug purposes.
 578    * Note: uchar used for reduced memory usage.
 579    */
 580   unsigned char cur_event;
 581   unsigned char last_event;
 582   unsigned char last_major_event;
 583
 584   /* Peer index, used for dumping TABLE_DUMP_V2 format */
 585   uint16_t table_dump_index;
 586
 587   /* Peer information */
 588   int fd;                       /* File descriptor */
 589   int ttl;                      /* TTL of TCP connection to the peer. */
 590   int rtt;                      /* Estimated round-trip-time from TCP_INFO */
 591   int gtsm_hops;                /* minimum hopcount to peer */
 592   char *desc;                   /* Description of the peer. */
 593   unsigned short port;          /* Destination port for peer */
 594   char *host;                   /* Printable address of the peer. */
 595   union sockunion su;           /* Sockunion address of the peer. */
 596 #define BGP_PEER_SU_UNSPEC(peer) (peer->su.sa.sa_family == AF_UNSPEC)
 597   time_t uptime;                /* Last Up/Down time */
 598   time_t readtime;              /* Last read time */
 599   time_t resettime;             /* Last reset time */
 600
 601   ifindex_t ifindex;            /* ifindex of the BGP connection. */
 602   char *conf_if;                /* neighbor interface config name. */
 603   struct interface *ifp;        /* corresponding interface */
 604   char *ifname;                 /* bind interface name. */
 605   char *update_if;
 606   union sockunion *update_source;
 607
 608   union sockunion *su_local;    /* Sockunion of local address.  */
 609   union sockunion *su_remote;   /* Sockunion of remote address.  */
 610   int shared_network;           /* Is this peer shared same network. */
 611   struct bgp_nexthop nexthop;   /* Nexthop */
 612
 613   /* Peer address family configuration. */
 614   u_char afc[AFI_MAX][SAFI_MAX];
 615   u_char afc_nego[AFI_MAX][SAFI_MAX];
 616   u_char afc_adv[AFI_MAX][SAFI_MAX];
 617   u_char afc_recv[AFI_MAX][SAFI_MAX];
 618
 619   /* Capability flags (reset in bgp_stop) */
 620   u_int32_t cap;
 621 #define PEER_CAP_REFRESH_ADV                (1 << 0) /* refresh advertised */
 622 #define PEER_CAP_REFRESH_OLD_RCV            (1 << 1) /* refresh old received */
 623 #define PEER_CAP_REFRESH_NEW_RCV            (1 << 2) /* refresh rfc received */
 624 #define PEER_CAP_DYNAMIC_ADV                (1 << 3) /* dynamic advertised */
 625 #define PEER_CAP_DYNAMIC_RCV                (1 << 4) /* dynamic received */
 626 #define PEER_CAP_RESTART_ADV                (1 << 5) /* restart advertised */
 627 #define PEER_CAP_RESTART_RCV                (1 << 6) /* restart received */
 628 #define PEER_CAP_AS4_ADV                    (1 << 7) /* as4 advertised */
 629 #define PEER_CAP_AS4_RCV                    (1 << 8) /* as4 received */
 630 #define PEER_CAP_RESTART_BIT_ADV            (1 << 9) /* sent restart state */
 631 #define PEER_CAP_RESTART_BIT_RCV            (1 << 10) /* peer restart state */
 632 #define PEER_CAP_ADDPATH_ADV                (1 << 11) /* addpath advertised */
 633 #define PEER_CAP_ADDPATH_RCV                (1 << 12) /* addpath received */
 634 #define PEER_CAP_ENHE_ADV                   (1 << 13) /* Extended nexthop advertised */
 635 #define PEER_CAP_ENHE_RCV                   (1 << 14) /* Extended nexthop received */
 636 #define PEER_CAP_HOSTNAME_ADV               (1 << 15) /* hostname advertised */
 637 #define PEER_CAP_HOSTNAME_RCV               (1 << 16) /* hostname received */
 638
 639   /* Capability flags (reset in bgp_stop) */
 640   u_int32_t af_cap[AFI_MAX][SAFI_MAX];
 641 #define PEER_CAP_ORF_PREFIX_SM_ADV          (1 << 0) /* send-mode advertised */
 642 #define PEER_CAP_ORF_PREFIX_RM_ADV          (1 << 1) /* receive-mode advertised */
 643 #define PEER_CAP_ORF_PREFIX_SM_RCV          (1 << 2) /* send-mode received */
 644 #define PEER_CAP_ORF_PREFIX_RM_RCV          (1 << 3) /* receive-mode received */
 645 #define PEER_CAP_ORF_PREFIX_SM_OLD_RCV      (1 << 4) /* send-mode received */
 646 #define PEER_CAP_ORF_PREFIX_RM_OLD_RCV      (1 << 5) /* receive-mode received */
 647 #define PEER_CAP_RESTART_AF_RCV             (1 << 6) /* graceful restart afi/safi received */
 648 #define PEER_CAP_RESTART_AF_PRESERVE_RCV    (1 << 7) /* graceful restart afi/safi F-bit received */
 649 #define PEER_CAP_ADDPATH_AF_TX_ADV          (1 << 8) /* addpath tx advertised */
 650 #define PEER_CAP_ADDPATH_AF_TX_RCV          (1 << 9) /* addpath tx received */
 651 #define PEER_CAP_ADDPATH_AF_RX_ADV          (1 << 10) /* addpath rx advertised */
 652 #define PEER_CAP_ADDPATH_AF_RX_RCV          (1 << 11) /* addpath rx received */
 653 #define PEER_CAP_ENHE_AF_ADV                (1 << 12) /* Extended nexthopi afi/safi advertised */
 654 #define PEER_CAP_ENHE_AF_RCV                (1 << 13) /* Extended nexthop afi/safi received */
 655 #define PEER_CAP_ENHE_AF_NEGO               (1 << 14) /* Extended nexthop afi/safi negotiated */
 656
 657   /* Global configuration flags. */
 658   u_int32_t flags;
 659 #define PEER_FLAG_PASSIVE                   (1 << 0) /* passive mode */
 660 #define PEER_FLAG_SHUTDOWN                  (1 << 1) /* shutdown */
 661 #define PEER_FLAG_DONT_CAPABILITY           (1 << 2) /* dont-capability */
 662 #define PEER_FLAG_OVERRIDE_CAPABILITY       (1 << 3) /* override-capability */
 663 #define PEER_FLAG_STRICT_CAP_MATCH          (1 << 4) /* strict-match */
 664 #define PEER_FLAG_DYNAMIC_CAPABILITY        (1 << 5) /* dynamic capability */
 665 #define PEER_FLAG_DISABLE_CONNECTED_CHECK   (1 << 6) /* disable-connected-check */
 666 #define PEER_FLAG_LOCAL_AS_NO_PREPEND       (1 << 7) /* local-as no-prepend */
 667 #define PEER_FLAG_LOCAL_AS_REPLACE_AS       (1 << 8) /* local-as no-prepend replace-as */
 668 #define PEER_FLAG_DELETE                    (1 << 9) /* mark the peer for deleting */
 669 #define PEER_FLAG_CONFIG_NODE               (1 << 10) /* the node to update configs on */
 670 #define PEER_FLAG_LONESOUL                  (1 << 11)
 671 #define PEER_FLAG_DYNAMIC_NEIGHBOR          (1 << 12) /* dynamic neighbor */
 672 #define PEER_FLAG_CAPABILITY_ENHE           (1 << 13) /* Extended next-hop (rfc 5549)*/
 673 #define PEER_FLAG_IFPEER_V6ONLY             (1 << 14) /* if-based peer is v6 only */
 674 #if ENABLE_BGP_VNC
 675 #define PEER_FLAG_IS_RFAPI_HD               (1 << 15) /* attached to rfapi HD */
 676 #endif
 677
 678   /* NSF mode (graceful restart) */
 679   u_char nsf[AFI_MAX][SAFI_MAX];
 680
 681   /* Per AF configuration flags. */
 682   u_int32_t af_flags[AFI_MAX][SAFI_MAX];
 683 #define PEER_FLAG_SEND_COMMUNITY            (1 << 0) /* send-community */
 684 #define PEER_FLAG_SEND_EXT_COMMUNITY        (1 << 1) /* send-community ext. */
 685 #define PEER_FLAG_NEXTHOP_SELF              (1 << 2) /* next-hop-self */
 686 #define PEER_FLAG_REFLECTOR_CLIENT          (1 << 3) /* reflector-client */
 687 #define PEER_FLAG_RSERVER_CLIENT            (1 << 4) /* route-server-client */
 688 #define PEER_FLAG_SOFT_RECONFIG             (1 << 5) /* soft-reconfiguration */
 689 #define PEER_FLAG_AS_PATH_UNCHANGED         (1 << 6) /* transparent-as */
 690 #define PEER_FLAG_NEXTHOP_UNCHANGED         (1 << 7) /* transparent-next-hop */
 691 #define PEER_FLAG_MED_UNCHANGED             (1 << 8) /* transparent-next-hop */
 692 #define PEER_FLAG_DEFAULT_ORIGINATE         (1 << 9) /* default-originate */
 693 #define PEER_FLAG_REMOVE_PRIVATE_AS         (1 << 10) /* remove-private-as */
 694 #define PEER_FLAG_ALLOWAS_IN                (1 << 11) /* set allowas-in */
 695 #define PEER_FLAG_ORF_PREFIX_SM             (1 << 12) /* orf capability send-mode */
 696 #define PEER_FLAG_ORF_PREFIX_RM             (1 << 13) /* orf capability receive-mode */
 697 #define PEER_FLAG_MAX_PREFIX                (1 << 14) /* maximum prefix */
 698 #define PEER_FLAG_MAX_PREFIX_WARNING        (1 << 15) /* maximum prefix warning-only */
 699 #define PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED   (1 << 16) /* leave link-local nexthop unchanged */
 700 #define PEER_FLAG_FORCE_NEXTHOP_SELF        (1 << 17) /* next-hop-self force */
 701 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL     (1 << 18) /* remove-private-as all */
 702 #define PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE (1 << 19) /* remove-private-as replace-as */
 703 #define PEER_FLAG_AS_OVERRIDE               (1 << 20) /* as-override */
 704 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE (1 << 21) /* remove-private-as all replace-as */
 705 #define PEER_FLAG_ADDPATH_TX_ALL_PATHS      (1 << 22) /* addpath-tx-all-paths */
 706 #define PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS (1 << 23) /* addpath-tx-bestpath-per-AS */
 707 #define PEER_FLAG_WEIGHT                    (1 << 24) /* weight */
 708 #define PEER_FLAG_ALLOWAS_IN_ORIGIN         (1 << 25) /* allowas-in origin */
 709 #define PEER_FLAG_SEND_LARGE_COMMUNITY      (1 << 26) /* Send large Communities */
 710
 711   /* MD5 password */
 712   char *password;
 713
 714   /* default-originate route-map.  */
 715   struct
 716   {
 717     char *name;
 718     struct route_map *map;
 719   } default_rmap[AFI_MAX][SAFI_MAX];
 720
 721   /* Peer status flags. */
 722   u_int16_t sflags;
 723 #define PEER_STATUS_ACCEPT_PEER       (1 << 0) /* accept peer */
 724 #define PEER_STATUS_PREFIX_OVERFLOW   (1 << 1) /* prefix-overflow */
 725 #define PEER_STATUS_CAPABILITY_OPEN   (1 << 2) /* capability open send */
 726 #define PEER_STATUS_HAVE_ACCEPT       (1 << 3) /* accept peer's parent */
 727 #define PEER_STATUS_GROUP             (1 << 4) /* peer-group conf */
 728 #define PEER_STATUS_NSF_MODE          (1 << 5) /* NSF aware peer */
 729 #define PEER_STATUS_NSF_WAIT          (1 << 6) /* wait comeback peer */
 730
 731   /* Peer status af flags (reset in bgp_stop) */
 732   u_int16_t af_sflags[AFI_MAX][SAFI_MAX];
 733 #define PEER_STATUS_ORF_PREFIX_SEND   (1 << 0) /* prefix-list send peer */
 734 #define PEER_STATUS_ORF_WAIT_REFRESH  (1 << 1) /* wait refresh received peer */
 735 #define PEER_STATUS_PREFIX_THRESHOLD  (1 << 2) /* exceed prefix-threshold */
 736 #define PEER_STATUS_PREFIX_LIMIT      (1 << 3) /* exceed prefix-limit */
 737 #define PEER_STATUS_EOR_SEND          (1 << 4) /* end-of-rib send to peer */
 738 #define PEER_STATUS_EOR_RECEIVED      (1 << 5) /* end-of-rib received from peer */
 739
 740   /* Default attribute value for the peer. */
 741   u_int32_t config;
 742 #define PEER_CONFIG_TIMER             (1 << 0) /* keepalive & holdtime */
 743 #define PEER_CONFIG_CONNECT           (1 << 1) /* connect */
 744 #define PEER_CONFIG_ROUTEADV          (1 << 2) /* route advertise */
 745
 746   u_int32_t holdtime;
 747   u_int32_t keepalive;
 748   u_int32_t connect;
 749   u_int32_t routeadv;
 750
 751   /* Timer values. */
 752   u_int32_t v_start;
 753   u_int32_t v_connect;
 754   u_int32_t v_holdtime;
 755   u_int32_t v_keepalive;
 756   u_int32_t v_routeadv;
 757   u_int32_t v_pmax_restart;
 758   u_int32_t v_gr_restart;
 759
 760   /* Threads. */
 761   struct thread *t_read;
 762   struct thread *t_write;
 763   struct thread *t_start;
 764   struct thread *t_connect;
 765   struct thread *t_holdtime;
 766   struct thread *t_keepalive;
 767   struct thread *t_routeadv;
 768   struct thread *t_pmax_restart;
 769   struct thread *t_gr_restart;
 770   struct thread *t_gr_stale;
 771
 772   /* workqueues */
 773   struct work_queue *clear_node_queue;
 774
 775   /* Statistics field */
 776   u_int32_t open_in;            /* Open message input count */
 777   u_int32_t open_out;           /* Open message output count */
 778   u_int32_t update_in;          /* Update message input count */
 779   u_int32_t update_out;         /* Update message ouput count */
 780   time_t update_time;           /* Update message received time. */
 781   u_int32_t keepalive_in;       /* Keepalive input count */
 782   u_int32_t keepalive_out;      /* Keepalive output count */
 783   u_int32_t notify_in;          /* Notify input count */
 784   u_int32_t notify_out;         /* Notify output count */
 785   u_int32_t refresh_in;         /* Route Refresh input count */
 786   u_int32_t refresh_out;        /* Route Refresh output count */
 787   u_int32_t dynamic_cap_in;     /* Dynamic Capability input count.  */
 788   u_int32_t dynamic_cap_out;    /* Dynamic Capability output count.  */
 789
 790   /* BGP state count */
 791   u_int32_t established;        /* Established */
 792   u_int32_t dropped;            /* Dropped */
 793
 794   /* Update delay related fields */
 795   u_char    update_delay_over;  /* When this is set, BGP is no more waiting for EOR */
 796
 797   /* Syncronization list and time.  */
 798   struct bgp_synchronize *sync[AFI_MAX][SAFI_MAX];
 799   time_t synctime;
 800   time_t last_write;  /* timestamp when the last msg was written */
 801   time_t last_update;  /* timestamp when the last UPDATE msg was written */
 802
 803   /* Send prefix count. */
 804   unsigned long scount[AFI_MAX][SAFI_MAX];
 805
 806   /* Announcement attribute hash.  */
 807   struct hash *hash[AFI_MAX][SAFI_MAX];
 808
 809   /* Notify data. */
 810   struct bgp_notify notify;
 811
 812   /* Whole packet size to be read. */
 813   unsigned long packet_size;
 814
 815   /* Filter structure. */
 816   struct bgp_filter filter[AFI_MAX][SAFI_MAX];
 817
 818   /* ORF Prefix-list */
 819   struct prefix_list *orf_plist[AFI_MAX][SAFI_MAX];
 820
 821   /* Text description of last attribute rcvd */
 822   char rcvd_attr_str[BUFSIZ];
 823
 824   /* Track if we printed the attribute in debugs */
 825   int rcvd_attr_printed;
 826
 827   /* Prefix count. */
 828   unsigned long pcount[AFI_MAX][SAFI_MAX];
 829
 830   /* Max prefix count. */
 831   unsigned long pmax[AFI_MAX][SAFI_MAX];
 832   u_char pmax_threshold[AFI_MAX][SAFI_MAX];
 833   u_int16_t pmax_restart[AFI_MAX][SAFI_MAX];
 834 #define MAXIMUM_PREFIX_THRESHOLD_DEFAULT 75
 835
 836   /* allowas-in. */
 837   char allowas_in[AFI_MAX][SAFI_MAX];
 838
 839   /* weight */
 840   unsigned long weight[AFI_MAX][SAFI_MAX];
 841
 842   /* peer reset cause */
 843   char last_reset;
 844 #define PEER_DOWN_RID_CHANGE             1 /* bgp router-id command */
 845 #define PEER_DOWN_REMOTE_AS_CHANGE       2 /* neighbor remote-as command */
 846 #define PEER_DOWN_LOCAL_AS_CHANGE        3 /* neighbor local-as command */
 847 #define PEER_DOWN_CLID_CHANGE            4 /* bgp cluster-id command */
 848 #define PEER_DOWN_CONFED_ID_CHANGE       5 /* bgp confederation identifier command */
 849 #define PEER_DOWN_CONFED_PEER_CHANGE     6 /* bgp confederation peer command */
 850 #define PEER_DOWN_RR_CLIENT_CHANGE       7 /* neighbor route-reflector-client command */
 851 #define PEER_DOWN_RS_CLIENT_CHANGE       8 /* neighbor route-server-client command */
 852 #define PEER_DOWN_UPDATE_SOURCE_CHANGE   9 /* neighbor update-source command */
 853 #define PEER_DOWN_AF_ACTIVATE           10 /* neighbor activate command */
 854 #define PEER_DOWN_USER_SHUTDOWN         11 /* neighbor shutdown command */
 855 #define PEER_DOWN_USER_RESET            12 /* clear ip bgp command */
 856 #define PEER_DOWN_NOTIFY_RECEIVED       13 /* notification received */
 857 #define PEER_DOWN_NOTIFY_SEND           14 /* notification send */
 858 #define PEER_DOWN_CLOSE_SESSION         15 /* tcp session close */
 859 #define PEER_DOWN_NEIGHBOR_DELETE       16 /* neghbor delete */
 860 #define PEER_DOWN_RMAP_BIND             17 /* neghbor peer-group command */
 861 #define PEER_DOWN_RMAP_UNBIND           18 /* no neighbor peer-group command */
 862 #define PEER_DOWN_CAPABILITY_CHANGE     19 /* neighbor capability command */
 863 #define PEER_DOWN_PASSIVE_CHANGE        20 /* neighbor passive command */
 864 #define PEER_DOWN_MULTIHOP_CHANGE       21 /* neighbor multihop command */
 865 #define PEER_DOWN_NSF_CLOSE_SESSION     22 /* NSF tcp session close */
 866 #define PEER_DOWN_V6ONLY_CHANGE         23 /* if-based peering v6only toggled */
 867 #define PEER_DOWN_BFD_DOWN              24 /* BFD down */
 868 #define PEER_DOWN_IF_DOWN               25 /* Interface down */
 869 #define PEER_DOWN_NBR_ADDR_DEL          26 /* Peer address lost */
 870 unsigned long last_reset_cause_size;
 871 u_char last_reset_cause[BGP_MAX_PACKET_SIZE];
 872
 873   /* The kind of route-map Flags.*/
 874   u_char rmap_type;
 875 #define PEER_RMAP_TYPE_IN             (1 << 0) /* neighbor route-map in */
 876 #define PEER_RMAP_TYPE_OUT            (1 << 1) /* neighbor route-map out */
 877 #define PEER_RMAP_TYPE_NETWORK        (1 << 2) /* network route-map */
 878 #define PEER_RMAP_TYPE_REDISTRIBUTE   (1 << 3) /* redistribute route-map */
 879 #define PEER_RMAP_TYPE_DEFAULT        (1 << 4) /* default-originate route-map */
 880 #define PEER_RMAP_TYPE_NOSET          (1 << 5) /* not allow to set commands */
 881 #define PEER_RMAP_TYPE_IMPORT         (1 << 6) /* neighbor route-map import */
 882 #define PEER_RMAP_TYPE_EXPORT         (1 << 7) /* neighbor route-map export */
 883
 884   /* peer specific BFD information */
 885   struct bfd_info *bfd_info;
 886
 887   /* hostname and domainname advertised by host */
 888   char *hostname;
 889   char *domainname;
 890
 891   QOBJ_FIELDS
 892 };
 893 DECLARE_QOBJ_TYPE(peer)
 894
 895 /* Check if suppress start/restart of sessions to peer. */
 896 #define BGP_PEER_START_SUPPRESSED(P) \
 897   (CHECK_FLAG ((P)->flags, PEER_FLAG_SHUTDOWN) \
 898    || CHECK_FLAG ((P)->sflags, PEER_STATUS_PREFIX_OVERFLOW))
 899
 900 #define PEER_PASSWORD_MINLEN    (1)
 901 #define PEER_PASSWORD_MAXLEN    (80)
 902
 903 /* This structure's member directly points incoming packet data
 904    stream. */
 905 struct bgp_nlri
 906 {
 907   /* AFI.  */
 908   afi_t afi;
 909
 910   /* SAFI.  */
 911   safi_t safi;
 912
 913   /* Pointer to NLRI byte stream.  */
 914   u_char *nlri;
 915
 916   /* Length of whole NLRI.  */
 917   bgp_size_t length;
 918 };
 919
 920 /* BGP versions.  */
 921 #define BGP_VERSION_4                            4
 922
 923 /* Default BGP port number.  */
 924 #define BGP_PORT_DEFAULT                       179
 925
 926 /* BGP minimum message size.  */
 927 #define BGP_MSG_OPEN_MIN_SIZE                   (BGP_HEADER_SIZE + 10)
 928 #define BGP_MSG_UPDATE_MIN_SIZE                 (BGP_HEADER_SIZE + 4)
 929 #define BGP_MSG_NOTIFY_MIN_SIZE                 (BGP_HEADER_SIZE + 2)
 930 #define BGP_MSG_KEEPALIVE_MIN_SIZE              (BGP_HEADER_SIZE + 0)
 931 #define BGP_MSG_ROUTE_REFRESH_MIN_SIZE          (BGP_HEADER_SIZE + 4)
 932 #define BGP_MSG_CAPABILITY_MIN_SIZE             (BGP_HEADER_SIZE + 3)
 933
 934 /* BGP message types.  */
 935 #define BGP_MSG_OPEN                             1
 936 #define BGP_MSG_UPDATE                           2
 937 #define BGP_MSG_NOTIFY                           3
 938 #define BGP_MSG_KEEPALIVE                        4
 939 #define BGP_MSG_ROUTE_REFRESH_NEW                5
 940 #define BGP_MSG_CAPABILITY                       6
 941 #define BGP_MSG_ROUTE_REFRESH_OLD              128
 942
 943 /* BGP open optional parameter.  */
 944 #define BGP_OPEN_OPT_AUTH                        1
 945 #define BGP_OPEN_OPT_CAP                         2
 946
 947 /* BGP4 attribute type codes.  */
 948 #define BGP_ATTR_ORIGIN                          1
 949 #define BGP_ATTR_AS_PATH                         2
 950 #define BGP_ATTR_NEXT_HOP                        3
 951 #define BGP_ATTR_MULTI_EXIT_DISC                 4
 952 #define BGP_ATTR_LOCAL_PREF                      5
 953 #define BGP_ATTR_ATOMIC_AGGREGATE                6
 954 #define BGP_ATTR_AGGREGATOR                      7
 955 #define BGP_ATTR_COMMUNITIES                     8
 956 #define BGP_ATTR_ORIGINATOR_ID                   9
 957 #define BGP_ATTR_CLUSTER_LIST                   10
 958 #define BGP_ATTR_DPA                            11
 959 #define BGP_ATTR_ADVERTISER                     12
 960 #define BGP_ATTR_RCID_PATH                      13
 961 #define BGP_ATTR_MP_REACH_NLRI                  14
 962 #define BGP_ATTR_MP_UNREACH_NLRI                15
 963 #define BGP_ATTR_EXT_COMMUNITIES                16
 964 #define BGP_ATTR_AS4_PATH                       17
 965 #define BGP_ATTR_AS4_AGGREGATOR                 18
 966 #define BGP_ATTR_AS_PATHLIMIT                   21
 967 #define BGP_ATTR_ENCAP                          23
 968 #define BGP_ATTR_LARGE_COMMUNITIES              32
 969 #if ENABLE_BGP_VNC
 970 #define BGP_ATTR_VNC                           255
 971 #endif
 972
 973 /* BGP update origin.  */
 974 #define BGP_ORIGIN_IGP                           0
 975 #define BGP_ORIGIN_EGP                           1
 976 #define BGP_ORIGIN_INCOMPLETE                    2
 977
 978 /* BGP notify message codes.  */
 979 #define BGP_NOTIFY_HEADER_ERR                    1
 980 #define BGP_NOTIFY_OPEN_ERR                      2
 981 #define BGP_NOTIFY_UPDATE_ERR                    3
 982 #define BGP_NOTIFY_HOLD_ERR                      4
 983 #define BGP_NOTIFY_FSM_ERR                       5
 984 #define BGP_NOTIFY_CEASE                         6
 985 #define BGP_NOTIFY_CAPABILITY_ERR                7
 986 #define BGP_NOTIFY_MAX                           8
 987
 988 #define BGP_NOTIFY_SUBCODE_UNSPECIFIC            0
 989
 990 /* BGP_NOTIFY_HEADER_ERR sub codes.  */
 991 #define BGP_NOTIFY_HEADER_NOT_SYNC               1
 992 #define BGP_NOTIFY_HEADER_BAD_MESLEN             2
 993 #define BGP_NOTIFY_HEADER_BAD_MESTYPE            3
 994 #define BGP_NOTIFY_HEADER_MAX                    4
 995
 996 /* BGP_NOTIFY_OPEN_ERR sub codes.  */
 997 #define BGP_NOTIFY_OPEN_MALFORMED_ATTR           0
 998 #define BGP_NOTIFY_OPEN_UNSUP_VERSION            1
 999 #define BGP_NOTIFY_OPEN_BAD_PEER_AS              2
1000 #define BGP_NOTIFY_OPEN_BAD_BGP_IDENT            3
1001 #define BGP_NOTIFY_OPEN_UNSUP_PARAM              4
1002 #define BGP_NOTIFY_OPEN_AUTH_FAILURE             5
1003 #define BGP_NOTIFY_OPEN_UNACEP_HOLDTIME          6
1004 #define BGP_NOTIFY_OPEN_UNSUP_CAPBL              7
1005 #define BGP_NOTIFY_OPEN_MAX                      8
1006
1007 /* BGP_NOTIFY_UPDATE_ERR sub codes.  */
1008 #define BGP_NOTIFY_UPDATE_MAL_ATTR               1
1009 #define BGP_NOTIFY_UPDATE_UNREC_ATTR             2
1010 #define BGP_NOTIFY_UPDATE_MISS_ATTR              3
1011 #define BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR          4
1012 #define BGP_NOTIFY_UPDATE_ATTR_LENG_ERR          5
1013 #define BGP_NOTIFY_UPDATE_INVAL_ORIGIN           6
1014 #define BGP_NOTIFY_UPDATE_AS_ROUTE_LOOP          7
1015 #define BGP_NOTIFY_UPDATE_INVAL_NEXT_HOP         8
1016 #define BGP_NOTIFY_UPDATE_OPT_ATTR_ERR           9
1017 #define BGP_NOTIFY_UPDATE_INVAL_NETWORK         10
1018 #define BGP_NOTIFY_UPDATE_MAL_AS_PATH           11
1019 #define BGP_NOTIFY_UPDATE_MAX                   12
1020
1021 /* BGP_NOTIFY_CEASE sub codes (RFC 4486).  */
1022 #define BGP_NOTIFY_CEASE_MAX_PREFIX              1
1023 #define BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN          2
1024 #define BGP_NOTIFY_CEASE_PEER_UNCONFIG           3
1025 #define BGP_NOTIFY_CEASE_ADMIN_RESET             4
1026 #define BGP_NOTIFY_CEASE_CONNECT_REJECT          5
1027 #define BGP_NOTIFY_CEASE_CONFIG_CHANGE           6
1028 #define BGP_NOTIFY_CEASE_COLLISION_RESOLUTION    7
1029 #define BGP_NOTIFY_CEASE_OUT_OF_RESOURCE         8
1030 #define BGP_NOTIFY_CEASE_MAX                     9
1031
1032 /* BGP_NOTIFY_CAPABILITY_ERR sub codes (draft-ietf-idr-dynamic-cap-02). */
1033 #define BGP_NOTIFY_CAPABILITY_INVALID_ACTION     1
1034 #define BGP_NOTIFY_CAPABILITY_INVALID_LENGTH     2
1035 #define BGP_NOTIFY_CAPABILITY_MALFORMED_CODE     3
1036 #define BGP_NOTIFY_CAPABILITY_MAX                4
1037
1038 /* BGP finite state machine status.  */
1039 #define Idle                                     1
1040 #define Connect                                  2
1041 #define Active                                   3
1042 #define OpenSent                                 4
1043 #define OpenConfirm                              5
1044 #define Established                              6
1045 #define Clearing                                 7
1046 #define Deleted                                  8
1047 #define BGP_STATUS_MAX                           9
1048
1049 /* BGP finite state machine events.  */
1050 #define BGP_Start                                1
1051 #define BGP_Stop                                 2
1052 #define TCP_connection_open                      3
1053 #define TCP_connection_closed                    4
1054 #define TCP_connection_open_failed               5
1055 #define TCP_fatal_error                          6
1056 #define ConnectRetry_timer_expired               7
1057 #define Hold_Timer_expired                       8
1058 #define KeepAlive_timer_expired                  9
1059 #define Receive_OPEN_message                    10
1060 #define Receive_KEEPALIVE_message               11
1061 #define Receive_UPDATE_message                  12
1062 #define Receive_NOTIFICATION_message            13
1063 #define Clearing_Completed                      14
1064 #define BGP_EVENTS_MAX                          15
1065
1066 /* BGP timers default value.  */
1067 #define BGP_INIT_START_TIMER                     1
1068 #define BGP_DEFAULT_HOLDTIME                     9
1069 #define BGP_DEFAULT_KEEPALIVE                    3
1070 #define BGP_DEFAULT_EBGP_ROUTEADV                0
1071 #define BGP_DEFAULT_IBGP_ROUTEADV                0
1072 #define BGP_DEFAULT_CONNECT_RETRY               10
1073
1074 /* BGP default local preference.  */
1075 #define BGP_DEFAULT_LOCAL_PREF                 100
1076
1077 /* BGP default subgroup packet queue max .  */
1078 #define BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX      40
1079
1080 /* BGP graceful restart  */
1081 #define BGP_DEFAULT_RESTART_TIME               120
1082 #define BGP_DEFAULT_STALEPATH_TIME             360
1083
1084 /* BGP uptime string length.  */
1085 #define BGP_UPTIME_LEN 25
1086
1087 /* Default configuration settings for bgpd.  */
1088 #define BGP_VTY_PORT                          2605
1089 #define BGP_DEFAULT_CONFIG             "bgpd.conf"
1090
1091 /* Check AS path loop when we send NLRI.  */
1092 /* #define BGP_SEND_ASPATH_CHECK */
1093
1094 /* BGP Dynamic Neighbors feature */
1095 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT    100
1096 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MIN          1
1097 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MAX       5000
1098
1099 /* Flag for peer_clear_soft().  */
1100 enum bgp_clear_type
1101 {
1102   BGP_CLEAR_SOFT_NONE,
1103   BGP_CLEAR_SOFT_OUT,
1104   BGP_CLEAR_SOFT_IN,
1105   BGP_CLEAR_SOFT_BOTH,
1106   BGP_CLEAR_SOFT_IN_ORF_PREFIX
1107 };
1108
1109 /* Macros. */
1110 #define BGP_INPUT(P)         ((P)->ibuf)
1111 #define BGP_INPUT_PNT(P)     (STREAM_PNT(BGP_INPUT(P)))
1112 #define BGP_IS_VALID_STATE_FOR_NOTIF(S)\
1113         (((S) == OpenSent) || ((S) == OpenConfirm) || ((S) == Established))
1114
1115 /* BGP error codes.  */
1116 #define BGP_SUCCESS                               0
1117 #define BGP_ERR_INVALID_VALUE                    -1
1118 #define BGP_ERR_INVALID_FLAG                     -2
1119 #define BGP_ERR_INVALID_AS                       -3
1120 #define BGP_ERR_INVALID_BGP                      -4
1121 #define BGP_ERR_PEER_GROUP_MEMBER                -5
1122 #define BGP_ERR_MULTIPLE_INSTANCE_USED           -6
1123 #define BGP_ERR_PEER_GROUP_NO_REMOTE_AS          -7
1124 #define BGP_ERR_PEER_GROUP_CANT_CHANGE           -8
1125 #define BGP_ERR_PEER_GROUP_MISMATCH              -9
1126 #define BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT  -10
1127 #define BGP_ERR_MULTIPLE_INSTANCE_NOT_SET       -11
1128 #define BGP_ERR_AS_MISMATCH                     -12
1129 #define BGP_ERR_PEER_FLAG_CONFLICT              -13
1130 #define BGP_ERR_PEER_GROUP_SHUTDOWN             -14
1131 #define BGP_ERR_PEER_FILTER_CONFLICT            -15
1132 #define BGP_ERR_NOT_INTERNAL_PEER               -16
1133 #define BGP_ERR_REMOVE_PRIVATE_AS               -17
1134 #define BGP_ERR_AF_UNCONFIGURED                 -18
1135 #define BGP_ERR_SOFT_RECONFIG_UNCONFIGURED      -19
1136 #define BGP_ERR_INSTANCE_MISMATCH               -20
1137 #define BGP_ERR_LOCAL_AS_ALLOWED_ONLY_FOR_EBGP  -21
1138 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS    -22
1139 #define BGP_ERR_TCPSIG_FAILED                   -23
1140 #define BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK   -24
1141 #define BGP_ERR_NO_IBGP_WITH_TTLHACK            -25
1142 #define BGP_ERR_NO_INTERFACE_CONFIG             -26
1143 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS_REMOTE_AS    -27
1144 #define BGP_ERR_AS_OVERRIDE                     -28
1145 #define BGP_ERR_INVALID_DYNAMIC_NEIGHBORS_LIMIT -29
1146 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_EXISTS  -30
1147 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_NOT_FOUND -31
1148 #define BGP_ERR_INVALID_FOR_DYNAMIC_PEER        -32
1149 #define BGP_ERR_MAX                             -33
1150 #define BGP_ERR_INVALID_FOR_DIRECT_PEER         -34
1151
1152 /*
1153  * Enumeration of different policy kinds a peer can be configured with.
1154  */
1155 typedef enum
1156 {
1157   BGP_POLICY_ROUTE_MAP,
1158   BGP_POLICY_FILTER_LIST,
1159   BGP_POLICY_PREFIX_LIST,
1160   BGP_POLICY_DISTRIBUTE_LIST,
1161 } bgp_policy_type_e;
1162
1163 extern struct bgp_master *bm;
1164
1165 /* Prototypes. */
1166 extern void bgp_terminate (void);
1167 extern void bgp_reset (void);
1168 extern time_t bgp_clock (void);
1169 extern void bgp_zclient_reset (void);
1170 extern int bgp_nexthop_set (union sockunion *, union sockunion *,
1171                      struct bgp_nexthop *, struct peer *);
1172 extern struct bgp *bgp_get_default (void);
1173 extern struct bgp *bgp_lookup (as_t, const char *);
1174 extern struct bgp *bgp_lookup_by_name (const char *);
1175 extern struct bgp *bgp_lookup_by_vrf_id (vrf_id_t);
1176 extern struct peer *peer_lookup (struct bgp *, union sockunion *);
1177 extern struct peer *peer_lookup_by_conf_if (struct bgp *, const char *);
1178 extern struct peer *peer_lookup_by_hostname(struct bgp *, const char *);
1179 extern void  bgp_peer_conf_if_to_su_update (struct peer *);
1180 extern int peer_group_listen_range_del(struct peer_group *, struct prefix *);
1181 extern struct peer_group *peer_group_lookup (struct bgp *, const char *);
1182 extern struct peer_group *peer_group_get (struct bgp *, const char *);
1183 extern struct peer *peer_create_bind_dynamic_neighbor (struct bgp *,
1184                     union sockunion *, struct peer_group *);
1185 extern struct prefix *peer_group_lookup_dynamic_neighbor_range (
1186                      struct peer_group *, struct prefix *);
1187 extern struct peer_group *peer_group_lookup_dynamic_neighbor (struct bgp *,
1188                      struct prefix *, struct prefix **);
1189 extern struct peer *peer_lookup_dynamic_neighbor (struct bgp *,
1190                      union sockunion *);
1191 extern void peer_drop_dynamic_neighbor (struct peer *);
1192
1193 /*
1194  * Peers are incredibly easy to memory leak
1195  * due to the various ways that they are actually used
1196  * Provide some functionality to debug locks and unlocks
1197  */
1198 extern struct peer *peer_lock_with_caller(const char *, struct peer *);
1199 extern struct peer *peer_unlock_with_caller(const char *, struct peer *);
1200 #define peer_unlock(A) peer_unlock_with_caller(__FUNCTION__, (A))
1201 #define peer_lock(B) peer_lock_with_caller(__FUNCTION__, (B))
1202
1203 extern bgp_peer_sort_t peer_sort (struct peer *peer);
1204 extern int peer_active (struct peer *);
1205 extern int peer_active_nego (struct peer *);
1206 extern void bgp_recalculate_all_bestpaths (struct bgp *bgp);
1207 extern struct peer *peer_create(union sockunion *, const char *, struct bgp *,
1208                                 as_t, as_t, int, afi_t, safi_t, struct peer_group *);
1209 extern struct peer *peer_create_accept (struct bgp *);
1210 extern void peer_xfer_config (struct peer *dst, struct peer *src);
1211 extern char *peer_uptime (time_t, char *, size_t, u_char, json_object *);
1212
1213 extern int bgp_config_write (struct vty *);
1214 extern void bgp_config_write_family_header (struct vty *, afi_t, safi_t, int *);
1215
1216 extern void bgp_master_init (void);
1217
1218 extern void bgp_init (void);
1219 extern void bgp_route_map_init (void);
1220 extern void bgp_session_reset (struct peer *);
1221
1222 extern int bgp_option_set (int);
1223 extern int bgp_option_unset (int);
1224 extern int bgp_option_check (int);
1225
1226 extern int bgp_get (struct bgp **, as_t *, const char *, enum bgp_instance_type);
1227 extern void bgp_instance_up (struct bgp *);
1228 extern void bgp_instance_down (struct bgp *);
1229 extern int bgp_delete (struct bgp *);
1230
1231 extern int bgp_flag_set (struct bgp *, int);
1232 extern int bgp_flag_unset (struct bgp *, int);
1233 extern int bgp_flag_check (struct bgp *, int);
1234
1235 extern void bgp_lock (struct bgp *);
1236 extern void bgp_unlock (struct bgp *);
1237
1238 extern void bgp_router_id_zebra_bump (vrf_id_t, const struct prefix*);
1239 extern int bgp_router_id_static_set (struct bgp *, struct in_addr);
1240
1241 extern int bgp_cluster_id_set (struct bgp *, struct in_addr *);
1242 extern int bgp_cluster_id_unset (struct bgp *);
1243
1244 extern int bgp_confederation_id_set (struct bgp *, as_t);
1245 extern int bgp_confederation_id_unset (struct bgp *);
1246 extern int bgp_confederation_peers_check (struct bgp *, as_t);
1247
1248 extern int bgp_confederation_peers_add (struct bgp *, as_t);
1249 extern int bgp_confederation_peers_remove (struct bgp *, as_t);
1250
1251 extern int bgp_timers_set (struct bgp *, u_int32_t keepalive, u_int32_t holdtime);
1252 extern int bgp_timers_unset (struct bgp *);
1253
1254 extern int bgp_default_local_preference_set (struct bgp *, u_int32_t);
1255 extern int bgp_default_local_preference_unset (struct bgp *);
1256
1257 extern int bgp_default_subgroup_pkt_queue_max_set (struct bgp *bgp, u_int32_t);
1258 extern int bgp_default_subgroup_pkt_queue_max_unset (struct bgp *bgp);
1259
1260 extern int bgp_listen_limit_set (struct bgp *, int);
1261 extern int bgp_listen_limit_unset (struct bgp *);
1262
1263 extern int bgp_update_delay_active (struct bgp *);
1264 extern int bgp_update_delay_configured (struct bgp *);
1265 extern void peer_as_change (struct peer *, as_t, int);
1266 extern int peer_remote_as (struct bgp *, union sockunion *,const char *, as_t *,
1267                            int, afi_t, safi_t);
1268 extern int peer_group_remote_as (struct bgp *, const char *, as_t *, int);
1269 extern int peer_delete (struct peer *peer);
1270 extern int peer_group_delete (struct peer_group *);
1271 extern int peer_group_remote_as_delete (struct peer_group *);
1272 extern int peer_group_listen_range_add(struct peer_group *, struct prefix *);
1273
1274 extern int peer_activate (struct peer *, afi_t, safi_t);
1275 extern int peer_deactivate (struct peer *, afi_t, safi_t);
1276 extern int peer_afc_set (struct peer *, afi_t, safi_t, int);
1277
1278 extern int peer_group_bind (struct bgp *, union sockunion *, struct peer *,
1279                             struct peer_group *, as_t *);
1280 extern int peer_group_unbind (struct bgp *, struct peer *, struct peer_group *);
1281
1282 extern int peer_flag_set (struct peer *, u_int32_t);
1283 extern int peer_flag_unset (struct peer *, u_int32_t);
1284
1285 extern int peer_af_flag_set (struct peer *, afi_t, safi_t, u_int32_t);
1286 extern int peer_af_flag_unset (struct peer *, afi_t, safi_t, u_int32_t);
1287 extern int peer_af_flag_check (struct peer *, afi_t, safi_t, u_int32_t);
1288
1289 extern int peer_ebgp_multihop_set (struct peer *, int);
1290 extern int peer_ebgp_multihop_unset (struct peer *);
1291 extern int is_ebgp_multihop_configured (struct peer *peer);
1292
1293 extern int peer_description_set (struct peer *, const char *);
1294 extern int peer_description_unset (struct peer *);
1295
1296 extern int peer_update_source_if_set (struct peer *, const char *);
1297 extern int peer_update_source_addr_set (struct peer *, const union sockunion *);
1298 extern int peer_update_source_unset (struct peer *);
1299
1300 extern int peer_default_originate_set (struct peer *, afi_t, safi_t, const char *);
1301 extern int peer_default_originate_unset (struct peer *, afi_t, safi_t);
1302
1303 extern int peer_port_set (struct peer *, u_int16_t);
1304 extern int peer_port_unset (struct peer *);
1305
1306 extern int peer_weight_set (struct peer *, afi_t, safi_t, u_int16_t);
1307 extern int peer_weight_unset (struct peer *, afi_t, safi_t);
1308
1309 extern int peer_timers_set (struct peer *, u_int32_t keepalive, u_int32_t holdtime);
1310 extern int peer_timers_unset (struct peer *);
1311
1312 extern int peer_timers_connect_set (struct peer *, u_int32_t);
1313 extern int peer_timers_connect_unset (struct peer *);
1314
1315 extern int peer_advertise_interval_set (struct peer *, u_int32_t);
1316 extern int peer_advertise_interval_unset (struct peer *);
1317
1318 extern void peer_interface_set (struct peer *, const char *);
1319 extern void peer_interface_unset (struct peer *);
1320
1321 extern int peer_distribute_set (struct peer *, afi_t, safi_t, int, const char *);
1322 extern int peer_distribute_unset (struct peer *, afi_t, safi_t, int);
1323
1324 extern int peer_allowas_in_set (struct peer *, afi_t, safi_t, int, int);
1325 extern int peer_allowas_in_unset (struct peer *, afi_t, safi_t);
1326
1327 extern int peer_local_as_set (struct peer *, as_t, int, int);
1328 extern int peer_local_as_unset (struct peer *);
1329
1330 extern int peer_prefix_list_set (struct peer *, afi_t, safi_t, int, const char *);
1331 extern int peer_prefix_list_unset (struct peer *, afi_t, safi_t, int);
1332
1333 extern int peer_aslist_set (struct peer *, afi_t, safi_t, int, const char *);
1334 extern int peer_aslist_unset (struct peer *,afi_t, safi_t, int);
1335
1336 extern int peer_route_map_set (struct peer *, afi_t, safi_t, int, const char *);
1337 extern int peer_route_map_unset (struct peer *, afi_t, safi_t, int);
1338
1339 extern int peer_unsuppress_map_set (struct peer *, afi_t, safi_t, const char *);
1340
1341 extern int peer_password_set (struct peer *, const char *);
1342 extern int peer_password_unset (struct peer *);
1343
1344 extern int peer_unsuppress_map_unset (struct peer *, afi_t, safi_t);
1345
1346 extern int peer_maximum_prefix_set (struct peer *, afi_t, safi_t, u_int32_t, u_char, int, u_int16_t);
1347 extern int peer_maximum_prefix_unset (struct peer *, afi_t, safi_t);
1348
1349 extern int peer_clear (struct peer *, struct listnode **);
1350 extern int peer_clear_soft (struct peer *, afi_t, safi_t, enum bgp_clear_type);
1351
1352 extern int peer_ttl_security_hops_set (struct peer *, int);
1353 extern int peer_ttl_security_hops_unset (struct peer *);
1354
1355 extern int bgp_route_map_update_timer (struct thread *thread);
1356 extern void bgp_route_map_terminate(void);
1357
1358 extern int peer_cmp (struct peer *p1, struct peer *p2);
1359
1360 extern int
1361 bgp_map_afi_safi_iana2int (iana_afi_t pkt_afi, safi_t pkt_safi,
1362                            afi_t *afi, safi_t *safi);
1363 extern int
1364 bgp_map_afi_safi_int2iana (afi_t afi, safi_t safi,
1365                            iana_afi_t *pkt_afi, safi_t *pkt_safi);
1366
1367 extern struct peer_af * peer_af_create (struct peer *, afi_t, safi_t);
1368 extern struct peer_af * peer_af_find (struct peer *, afi_t, safi_t);
1369 extern int peer_af_delete (struct peer *, afi_t, safi_t);
1370
1371 extern void bgp_close(void);
1372
1373 static inline int
1374 afindex (afi_t afi, safi_t safi)
1375 {
1376   switch (afi)
1377     {
1378     case AFI_IP:
1379       switch (safi)
1380         {
1381         case SAFI_UNICAST:
1382           return BGP_AF_IPV4_UNICAST;
1383           break;
1384         case SAFI_MULTICAST:
1385           return BGP_AF_IPV4_MULTICAST;
1386           break;
1387         case SAFI_MPLS_VPN:
1388           return BGP_AF_IPV4_VPN;
1389           break;
1390         case SAFI_ENCAP:
1391           return BGP_AF_IPV4_ENCAP;
1392           break;
1393         default:
1394           return BGP_AF_MAX;
1395           break;
1396         }
1397       break;
1398     case AFI_IP6:
1399       switch (safi)
1400         {
1401         case SAFI_UNICAST:
1402           return BGP_AF_IPV6_UNICAST;
1403           break;
1404         case SAFI_MULTICAST:
1405           return BGP_AF_IPV6_MULTICAST;
1406           break;
1407         case SAFI_MPLS_VPN:
1408           return BGP_AF_IPV6_VPN;
1409           break;
1410         case SAFI_ENCAP:
1411           return BGP_AF_IPV6_ENCAP;
1412           break;
1413         default:
1414           return BGP_AF_MAX;
1415           break;
1416         }
1417       break;
1418     case AFI_L2VPN:
1419       switch (safi)
1420         {
1421         case SAFI_EVPN:
1422           return BGP_AF_L2VPN_EVPN;
1423           break;
1424         default:
1425           return BGP_AF_MAX;
1426           break;
1427         }
1428     default:
1429       return BGP_AF_MAX;
1430       break;
1431     }
1432 }
1433
1434 /* If the peer is not a peer-group but is bound to a peer-group return 1 */
1435 static inline int
1436 peer_group_active (struct peer *peer)
1437 {
1438   if (!CHECK_FLAG (peer->sflags, PEER_STATUS_GROUP) && peer->group)
1439     return 1;
1440   return 0;
1441 }
1442
1443 /* If peer is negotiated at least one address family return 1. */
1444 static inline int
1445 peer_afi_active_nego (const struct peer *peer, afi_t afi)
1446 {
1447   if (peer->afc_nego[afi][SAFI_UNICAST]
1448       || peer->afc_nego[afi][SAFI_MULTICAST]
1449       || peer->afc_nego[afi][SAFI_MPLS_VPN]
1450       || peer->afc_nego[afi][SAFI_ENCAP])
1451     return 1;
1452   return 0;
1453 }
1454
1455 /* If at least one address family activated for group, return 1. */
1456 static inline int
1457 peer_group_af_configured (struct peer_group *group)
1458 {
1459   struct peer *peer = group->conf;
1460
1461   if (peer->afc[AFI_IP][SAFI_UNICAST]
1462       || peer->afc[AFI_IP][SAFI_MULTICAST]
1463       || peer->afc[AFI_IP][SAFI_MPLS_VPN]
1464       || peer->afc[AFI_IP][SAFI_ENCAP]
1465       || peer->afc[AFI_IP6][SAFI_UNICAST]
1466       || peer->afc[AFI_IP6][SAFI_MULTICAST]
1467       || peer->afc[AFI_IP6][SAFI_MPLS_VPN]
1468       || peer->afc[AFI_IP6][SAFI_ENCAP])
1469     return 1;
1470   return 0;
1471 }
1472
1473 static inline char *
1474 timestamp_string (time_t ts)
1475 {
1476   time_t tbuf;
1477   tbuf = time(NULL) - (bgp_clock() - ts);
1478   return ctime(&tbuf);
1479 }
1480
1481 static inline int
1482 peer_established (struct peer *peer)
1483 {
1484   if (peer->status == Established)
1485     return 1;
1486   return 0;
1487 }
1488
1489 static inline int
1490 peer_dynamic_neighbor (struct peer *peer)
1491 {
1492   return (CHECK_FLAG(peer->flags, PEER_FLAG_DYNAMIC_NEIGHBOR)) ? 1 : 0;
1493 }
1494
1495 /*
1496  * Currently supporting RFC 5549 for AFI_IP/SAFI_UNICAST only.
1497  *
1498  * Note: When other RFC-5549 applicable SAFIs to be supported, that should
1499  * come as an argument to this routine.
1500  */
1501 static inline int
1502 peer_cap_enhe (struct peer *peer)
1503 {
1504   return (CHECK_FLAG(peer->af_cap[AFI_IP][SAFI_UNICAST], PEER_CAP_ENHE_AF_NEGO));
1505 }
1506
1507 /* Lookup VRF for BGP instance based on its type. */
1508 static inline struct vrf *
1509 bgp_vrf_lookup_by_instance_type (struct bgp *bgp)
1510 {
1511   struct vrf *vrf;
1512
1513   if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
1514     vrf = vrf_lookup_by_id (VRF_DEFAULT);
1515   else if (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
1516     vrf = vrf_lookup_by_name (bgp->name);
1517   else
1518     vrf = NULL;
1519
1520   return vrf;
1521 }
1522
1523 /* Link BGP instance to VRF. */
1524 static inline void
1525 bgp_vrf_link (struct bgp *bgp, struct vrf *vrf)
1526 {
1527   bgp->vrf_id = vrf->vrf_id;
1528   if (vrf->info != (void *)bgp)
1529     {
1530       bgp_lock (bgp);
1531       vrf->info = (void *)bgp;
1532     }
1533 }
1534
1535 /* Unlink BGP instance from VRF. */
1536 static inline void
1537 bgp_vrf_unlink (struct bgp *bgp, struct vrf *vrf)
1538 {
1539   if (vrf->info == (void *)bgp)
1540     {
1541       vrf->info = NULL;
1542       bgp_unlock (bgp);
1543     }
1544   bgp->vrf_id = VRF_UNKNOWN;
1545 }
1546
1547 extern void bgp_update_redist_vrf_bitmaps (struct bgp*, vrf_id_t);
1548
1549 /* For benefit of rfapi */
1550 extern struct peer * peer_new (struct bgp *bgp);
1551
1552 #endif /* _QUAGGA_BGPD_H */