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 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_BGPD_H
  22 #define _QUAGGA_BGPD_H
  23
  24 #include "qobj.h"
  25 #include "lib/json.h"
  26 #include "vrf.h"
  27 #include "vty.h"
  28
  29 /* For union sockunion.  */
  30 #include "queue.h"
  31 #include "sockunion.h"
  32 #include "routemap.h"
  33 #include "linklist.h"
  34 #include "defaults.h"
  35 #include "bgp_memory.h"
  36 #include "bitfield.h"
  37
  38 #define BGP_MAX_HOSTNAME 64     /* Linux max, is larger than most other sys */
  39
  40 /* Default interval for IPv6 RAs when triggered by BGP unnumbered neighbor. */
  41 #define BGP_UNNUM_DEFAULT_RA_INTERVAL 10
  42
  43 struct update_subgroup;
  44 struct bpacket;
  45
  46 /*
  47  * Allow the neighbor XXXX remote-as to take internal or external
  48  * AS_SPECIFIED is zero to auto-inherit original non-feature/enhancement behavior
  49  * in the system.
  50  */
  51 enum {
  52   AS_UNSPECIFIED = 0,
  53   AS_SPECIFIED,
  54   AS_INTERNAL,
  55   AS_EXTERNAL,
  56 };
  57
  58 /* Typedef BGP specific types.  */
  59 typedef u_int32_t as_t;
  60 typedef u_int16_t as16_t; /* we may still encounter 16 Bit asnums */
  61 typedef u_int16_t bgp_size_t;
  62
  63 #define max(a,b)                \
  64   ({ __typeof__ (a) _a = (a);   \
  65     __typeof__ (b) _b = (b);    \
  66     _a > _b ? _a : _b; })
  67
  68 enum bgp_af_index
  69 {
  70   BGP_AF_START,
  71   BGP_AF_IPV4_UNICAST = BGP_AF_START,
  72   BGP_AF_IPV4_MULTICAST,
  73   BGP_AF_IPV4_VPN,
  74   BGP_AF_IPV6_UNICAST,
  75   BGP_AF_IPV6_MULTICAST,
  76   BGP_AF_IPV6_VPN,
  77   BGP_AF_IPV4_ENCAP,
  78   BGP_AF_IPV6_ENCAP,
  79   BGP_AF_L2VPN_EVPN,
  80   BGP_AF_IPV4_LBL_UNICAST,
  81   BGP_AF_IPV6_LBL_UNICAST,
  82   BGP_AF_MAX
  83 };
  84
  85 #define AF_FOREACH(af) \
  86   for ((af) = BGP_AF_START; (af) < BGP_AF_MAX; (af)++)
  87
  88 #define FOREACH_AFI_SAFI(afi, safi)                     \
  89   for (afi = AFI_IP; afi < AFI_MAX; afi++)              \
  90     for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++)
  91
  92 /* BGP master for system wide configurations and variables.  */
  93 struct bgp_master
  94 {
  95   /* BGP instance list.  */
  96   struct list *bgp;
  97
  98   /* BGP thread master.  */
  99   struct thread_master *master;
 100
 101   /* work queues */
 102   struct work_queue *process_main_queue;
 103
 104   /* Listening sockets */
 105   struct list *listen_sockets;
 106
 107   /* BGP port number.  */
 108   u_int16_t port;
 109
 110   /* Listener address */
 111   char *address;
 112
 113   /* BGP start time.  */
 114   time_t start_time;
 115
 116   /* Various BGP global configuration.  */
 117   u_char options;
 118 #define BGP_OPT_NO_FIB                   (1 << 0)
 119 #define BGP_OPT_MULTIPLE_INSTANCE        (1 << 1)
 120 #define BGP_OPT_CONFIG_CISCO             (1 << 2)
 121 #define BGP_OPT_NO_LISTEN                (1 << 3)
 122
 123   uint64_t updgrp_idspace;
 124   uint64_t subgrp_idspace;
 125
 126   /* timer to dampen route map changes */
 127   struct thread *t_rmap_update;   /* Handle route map updates */
 128   u_int32_t rmap_update_timer;    /* Route map update timer */
 129 #define RMAP_DEFAULT_UPDATE_TIMER 5 /* disabled by default */
 130
 131   QOBJ_FIELDS
 132 };
 133 DECLARE_QOBJ_TYPE(bgp_master)
 134
 135 /* BGP route-map structure.  */
 136 struct bgp_rmap
 137 {
 138   char *name;
 139   struct route_map *map;
 140 };
 141
 142 struct bgp_redist
 143 {
 144   u_short instance;
 145
 146   /* BGP redistribute metric configuration. */
 147   u_char redist_metric_flag;
 148   u_int32_t redist_metric;
 149
 150   /* BGP redistribute route-map.  */
 151   struct bgp_rmap rmap;
 152 };
 153
 154 /*
 155  * Type of 'struct bgp'.
 156  * - Default: The default instance
 157  * - VRF: A specific (non-default) VRF
 158  * - View: An instance used for route exchange
 159  * The "default" instance is treated separately to simplify the code. Note
 160  * that if deployed in a Multi-VRF environment, it may not exist.
 161  */
 162 enum bgp_instance_type
 163 {
 164   BGP_INSTANCE_TYPE_DEFAULT,
 165   BGP_INSTANCE_TYPE_VRF,
 166   BGP_INSTANCE_TYPE_VIEW
 167 };
 168
 169 /* BGP instance structure.  */
 170 struct bgp
 171 {
 172   /* AS number of this BGP instance.  */
 173   as_t as;
 174
 175   /* Name of this BGP instance.  */
 176   char *name;
 177
 178   /* Type of instance and VRF id. */
 179   enum bgp_instance_type inst_type;
 180   vrf_id_t vrf_id;
 181
 182   /* Reference count to allow peer_delete to finish after bgp_delete */
 183   int lock;
 184
 185   /* Self peer.  */
 186   struct peer *peer_self;
 187
 188   /* BGP peer. */
 189   struct list *peer;
 190   struct hash *peerhash;
 191
 192   /* BGP peer group.  */
 193   struct list *group;
 194
 195   /* The maximum number of BGP dynamic neighbors that can be created */
 196   int dynamic_neighbors_limit;
 197
 198     /* The current number of BGP dynamic neighbors */
 199   int dynamic_neighbors_count;
 200
 201   struct hash *update_groups[BGP_AF_MAX];
 202
 203   /*
 204    * Global statistics for update groups.
 205    */
 206   struct {
 207     u_int32_t join_events;
 208     u_int32_t prune_events;
 209     u_int32_t merge_events;
 210     u_int32_t split_events;
 211     u_int32_t updgrp_switch_events;
 212     u_int32_t peer_refreshes_combined;
 213     u_int32_t adj_count;
 214     u_int32_t merge_checks_triggered;
 215
 216     u_int32_t updgrps_created;
 217     u_int32_t updgrps_deleted;
 218     u_int32_t subgrps_created;
 219     u_int32_t subgrps_deleted;
 220   } update_group_stats;
 221
 222   /* BGP configuration.  */
 223   u_int16_t config;
 224 #define BGP_CONFIG_CLUSTER_ID             (1 << 0)
 225 #define BGP_CONFIG_CONFEDERATION          (1 << 1)
 226
 227   /* BGP router identifier.  */
 228   struct in_addr router_id;
 229   struct in_addr router_id_static;
 230   struct in_addr router_id_zebra;
 231
 232   /* BGP route reflector cluster ID.  */
 233   struct in_addr cluster_id;
 234
 235   /* BGP confederation information.  */
 236   as_t confed_id;
 237   as_t *confed_peers;
 238   int confed_peers_cnt;
 239
 240   struct thread *t_startup; /* start-up timer on only once at the beginning */
 241
 242   u_int32_t v_maxmed_onstartup; /* Duration of max-med on start-up */
 243 #define BGP_MAXMED_ONSTARTUP_UNCONFIGURED  0 /* 0 means off, its the default */
 244   u_int32_t maxmed_onstartup_value; /* Max-med value when active on start-up */
 245   struct thread *t_maxmed_onstartup; /* non-null when max-med onstartup is on */
 246   u_char    maxmed_onstartup_over; /* Flag to make it effective only once */
 247
 248   u_char    v_maxmed_admin; /* 1/0 if max-med administrative is on/off */
 249 #define BGP_MAXMED_ADMIN_UNCONFIGURED  0 /* Off by default */
 250   u_int32_t maxmed_admin_value; /* Max-med value when administrative in on */
 251 #define BGP_MAXMED_VALUE_DEFAULT  4294967294 /* Maximum by default */
 252
 253   u_char    maxmed_active; /* 1/0 if max-med is active or not */
 254   u_int32_t maxmed_value; /* Max-med value when its active */
 255
 256   /* BGP update delay on startup */
 257   struct thread *t_update_delay;
 258   struct thread *t_establish_wait;
 259   u_char update_delay_over;
 260   u_char main_zebra_update_hold;
 261   u_char main_peers_update_hold;
 262   u_int16_t v_update_delay;
 263   u_int16_t v_establish_wait;
 264   char update_delay_begin_time[64];
 265   char update_delay_end_time[64];
 266   char update_delay_zebra_resume_time[64];
 267   char update_delay_peers_resume_time[64];
 268   u_int32_t established;
 269   u_int32_t restarted_peers;
 270   u_int32_t implicit_eors;
 271   u_int32_t explicit_eors;
 272 #define BGP_UPDATE_DELAY_DEF              0
 273 #define BGP_UPDATE_DELAY_MIN              0
 274 #define BGP_UPDATE_DELAY_MAX              3600
 275
 276   /* BGP flags. */
 277   u_int32_t flags;
 278 #define BGP_FLAG_ALWAYS_COMPARE_MED       (1 << 0)
 279 #define BGP_FLAG_DETERMINISTIC_MED        (1 << 1)
 280 #define BGP_FLAG_MED_MISSING_AS_WORST     (1 << 2)
 281 #define BGP_FLAG_MED_CONFED               (1 << 3)
 282 #define BGP_FLAG_NO_DEFAULT_IPV4          (1 << 4)
 283 #define BGP_FLAG_NO_CLIENT_TO_CLIENT      (1 << 5)
 284 #define BGP_FLAG_ENFORCE_FIRST_AS         (1 << 6)
 285 #define BGP_FLAG_COMPARE_ROUTER_ID        (1 << 7)
 286 #define BGP_FLAG_ASPATH_IGNORE            (1 << 8)
 287 #define BGP_FLAG_IMPORT_CHECK             (1 << 9)
 288 #define BGP_FLAG_NO_FAST_EXT_FAILOVER     (1 << 10)
 289 #define BGP_FLAG_LOG_NEIGHBOR_CHANGES     (1 << 11)
 290 #define BGP_FLAG_GRACEFUL_RESTART         (1 << 12)
 291 #define BGP_FLAG_ASPATH_CONFED            (1 << 13)
 292 #define BGP_FLAG_ASPATH_MULTIPATH_RELAX   (1 << 14)
 293 #define BGP_FLAG_RR_ALLOW_OUTBOUND_POLICY (1 << 15)
 294 #define BGP_FLAG_DISABLE_NH_CONNECTED_CHK (1 << 16)
 295 #define BGP_FLAG_MULTIPATH_RELAX_AS_SET   (1 << 17)
 296 #define BGP_FLAG_FORCE_STATIC_PROCESS     (1 << 18)
 297 #define BGP_FLAG_SHOW_HOSTNAME            (1 << 19)
 298 #define BGP_FLAG_GR_PRESERVE_FWD          (1 << 20)
 299
 300   /* BGP Per AF flags */
 301   u_int16_t af_flags[AFI_MAX][SAFI_MAX];
 302 #define BGP_CONFIG_DAMPENING              (1 << 0)
 303
 304   /* Route table for next-hop lookup cache. */
 305   struct bgp_table *nexthop_cache_table[AFI_MAX];
 306
 307   /* Route table for import-check */
 308   struct bgp_table *import_check_table[AFI_MAX];
 309
 310   struct bgp_table *connected_table[AFI_MAX];
 311
 312   struct hash *address_hash;
 313
 314   /* Static route configuration.  */
 315   struct bgp_table *route[AFI_MAX][SAFI_MAX];
 316
 317   /* Aggregate address configuration.  */
 318   struct bgp_table *aggregate[AFI_MAX][SAFI_MAX];
 319
 320   /* BGP routing information base.  */
 321   struct bgp_table *rib[AFI_MAX][SAFI_MAX];
 322
 323   /* BGP table route-map.  */
 324   struct bgp_rmap table_map[AFI_MAX][SAFI_MAX];
 325
 326   /* BGP redistribute configuration. */
 327   struct list *redist[AFI_MAX][ZEBRA_ROUTE_MAX];
 328
 329   /* timer to re-evaluate neighbor default-originate route-maps */
 330   struct thread *t_rmap_def_originate_eval;
 331 #define RMAP_DEFAULT_ORIGINATE_EVAL_TIMER 5
 332
 333   /* BGP distance configuration.  */
 334   u_char distance_ebgp[AFI_MAX][SAFI_MAX];
 335   u_char distance_ibgp[AFI_MAX][SAFI_MAX];
 336   u_char distance_local[AFI_MAX][SAFI_MAX];
 337
 338   /* BGP default local-preference.  */
 339   u_int32_t default_local_pref;
 340
 341   /* BGP default subgroup pkt queue max  */
 342   u_int32_t default_subgroup_pkt_queue_max;
 343
 344   /* BGP default timer.  */
 345   u_int32_t default_holdtime;
 346   u_int32_t default_keepalive;
 347
 348   /* BGP graceful restart */
 349   u_int32_t restart_time;
 350   u_int32_t stalepath_time;
 351
 352   /* Maximum-paths configuration */
 353   struct bgp_maxpaths_cfg {
 354     u_int16_t maxpaths_ebgp;
 355     u_int16_t maxpaths_ibgp;
 356     u_int16_t ibgp_flags;
 357 #define BGP_FLAG_IBGP_MULTIPATH_SAME_CLUSTERLEN (1 << 0)
 358   } maxpaths[AFI_MAX][SAFI_MAX];
 359
 360   u_int32_t wpkt_quanta;  /* per peer packet quanta to write */
 361   u_int32_t coalesce_time;
 362
 363   u_int32_t addpath_tx_id;
 364   int addpath_tx_used[AFI_MAX][SAFI_MAX];
 365
 366 #if ENABLE_BGP_VNC
 367   struct rfapi_cfg *rfapi_cfg;
 368   struct rfapi *rfapi;
 369 #endif
 370
 371   /* EVPN related information */
 372
 373   /* EVI hash table */
 374   struct hash *vnihash;
 375
 376   /* EVPN enable - advertise local VNIs and their MACs etc. */
 377   int advertise_all_vni;
 378
 379   /* Hash table of Import RTs to EVIs */
 380   struct hash *import_rt_hash;
 381
 382   /* Id space for automatic RD derivation for an EVI */
 383   bitfield_t rd_idspace;
 384
 385   QOBJ_FIELDS
 386 };
 387 DECLARE_QOBJ_TYPE(bgp)
 388
 389 #define BGP_ROUTE_ADV_HOLD(bgp) (bgp->main_peers_update_hold)
 390
 391 #define IS_BGP_INST_KNOWN_TO_ZEBRA(bgp) \
 392         (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT || \
 393          (bgp->inst_type == BGP_INSTANCE_TYPE_VRF && bgp->vrf_id != VRF_UNKNOWN))
 394
 395 /* BGP peer-group support. */
 396 struct peer_group
 397 {
 398   /* Name of the peer-group. */
 399   char *name;
 400
 401   /* Pointer to BGP.  */
 402   struct bgp *bgp;
 403
 404   /* Peer-group client list. */
 405   struct list *peer;
 406
 407   /** Dynamic neighbor listening ranges */
 408   struct list *listen_range[AFI_MAX];
 409
 410   /* Peer-group config */
 411   struct peer *conf;
 412 };
 413
 414 /* BGP Notify message format. */
 415 struct bgp_notify
 416 {
 417   u_char code;
 418   u_char subcode;
 419   char *data;
 420   bgp_size_t length;
 421   u_char *raw_data;
 422 };
 423
 424 /* Next hop self address. */
 425 struct bgp_nexthop
 426 {
 427   struct interface *ifp;
 428   struct in_addr v4;
 429   struct in6_addr v6_global;
 430   struct in6_addr v6_local;
 431 };
 432
 433 /* BGP addpath values */
 434 #define BGP_ADDPATH_RX     1
 435 #define BGP_ADDPATH_TX     2
 436 #define BGP_ADDPATH_ID_LEN 4
 437
 438 #define BGP_ADDPATH_TX_ID_FOR_DEFAULT_ORIGINATE 1
 439
 440 /* BGP router distinguisher value.  */
 441 #define BGP_RD_SIZE                8
 442
 443 struct bgp_rd
 444 {
 445   u_char val[BGP_RD_SIZE];
 446 };
 447
 448 #define RMAP_IN  0
 449 #define RMAP_OUT 1
 450 #define RMAP_MAX 2
 451
 452 #include "filter.h"
 453
 454 /* BGP filter structure. */
 455 struct bgp_filter
 456 {
 457   /* Distribute-list.  */
 458   struct
 459   {
 460     char *name;
 461     struct access_list *alist;
 462   } dlist[FILTER_MAX];
 463
 464   /* Prefix-list.  */
 465   struct
 466   {
 467     char *name;
 468     struct prefix_list *plist;
 469   } plist[FILTER_MAX];
 470
 471   /* Filter-list.  */
 472   struct
 473   {
 474     char *name;
 475     struct as_list *aslist;
 476   } aslist[FILTER_MAX];
 477
 478   /* Route-map.  */
 479   struct
 480   {
 481     char *name;
 482     struct route_map *map;
 483   } map[RMAP_MAX];
 484
 485   /* Unsuppress-map.  */
 486   struct
 487   {
 488     char *name;
 489     struct route_map *map;
 490   } usmap;
 491 };
 492
 493 /* IBGP/EBGP identifier.  We also have a CONFED peer, which is to say,
 494    a peer who's AS is part of our Confederation.  */
 495 typedef enum
 496 {
 497   BGP_PEER_IBGP = 1,
 498   BGP_PEER_EBGP,
 499   BGP_PEER_INTERNAL,
 500   BGP_PEER_CONFED,
 501 } bgp_peer_sort_t;
 502
 503 /* BGP message header and packet size.  */
 504 #define BGP_MARKER_SIZE                         16
 505 #define BGP_HEADER_SIZE                         19
 506 #define BGP_MAX_PACKET_SIZE                   4096
 507 #define BGP_MAX_PACKET_SIZE_OVERFLOW          1024
 508
 509 /*
 510  * Trigger delay for bgp_announce_route().
 511  */
 512 #define BGP_ANNOUNCE_ROUTE_SHORT_DELAY_MS  100
 513 #define BGP_ANNOUNCE_ROUTE_DELAY_MS        500
 514
 515 struct peer_af
 516 {
 517   /* back pointer to the peer */
 518   struct peer *peer;
 519
 520   /* which subgroup the peer_af belongs to */
 521   struct update_subgroup *subgroup;
 522
 523   /* for being part of an update subgroup's peer list */
 524   LIST_ENTRY(peer_af) subgrp_train;
 525
 526   /* for being part of a packet's peer list */
 527   LIST_ENTRY(peer_af) pkt_train;
 528
 529   struct bpacket *next_pkt_to_send;
 530
 531   /*
 532    * Trigger timer for bgp_announce_route().
 533    */
 534   struct thread *t_announce_route;
 535
 536   afi_t afi;
 537   safi_t safi;
 538   int afid;
 539 };
 540
 541 /* BGP neighbor structure. */
 542 struct peer
 543 {
 544   /* BGP structure.  */
 545   struct bgp *bgp;
 546
 547   /* reference count, primarily to allow bgp_process'ing of route_node's
 548    * to be done after a struct peer is deleted.
 549    *
 550    * named 'lock' for hysterical reasons within Quagga.
 551    */
 552   int lock;
 553
 554   /* BGP peer group.  */
 555   struct peer_group *group;
 556   uint64_t version[AFI_MAX][SAFI_MAX];
 557
 558   /* BGP peer_af structures, per configured AF on this peer */
 559   struct peer_af *peer_af_array[BGP_AF_MAX];
 560
 561   /* Peer's remote AS number. */
 562   int as_type;
 563   as_t as;
 564
 565   /* Peer's local AS number. */
 566   as_t local_as;
 567
 568   bgp_peer_sort_t sort;
 569
 570   /* Peer's Change local AS number. */
 571   as_t change_local_as;
 572
 573   /* Remote router ID. */
 574   struct in_addr remote_id;
 575
 576   /* Local router ID. */
 577   struct in_addr local_id;
 578
 579   /* Packet receive and send buffer. */
 580   struct stream *ibuf;
 581   struct stream_fifo *obuf;
 582   struct stream *work;
 583
 584   /* We use a separate stream to encode MP_REACH_NLRI for efficient
 585    * NLRI packing. peer->work stores all the other attributes. The
 586    * actual packet is then constructed by concatenating the two.
 587    */
 588   struct stream *scratch;
 589
 590   /* the doppelganger peer structure, due to dual TCP conn setup */
 591   struct peer *doppelganger;
 592
 593   /* Status of the peer. */
 594   int status;
 595   int ostatus;
 596
 597   /* FSM events, stored for debug purposes.
 598    * Note: uchar used for reduced memory usage.
 599    */
 600   unsigned char cur_event;
 601   unsigned char last_event;
 602   unsigned char last_major_event;
 603
 604   /* Peer index, used for dumping TABLE_DUMP_V2 format */
 605   uint16_t table_dump_index;
 606
 607   /* Peer information */
 608   int fd;                       /* File descriptor */
 609   int ttl;                      /* TTL of TCP connection to the peer. */
 610   int rtt;                      /* Estimated round-trip-time from TCP_INFO */
 611   int gtsm_hops;                /* minimum hopcount to peer */
 612   char *desc;                   /* Description of the peer. */
 613   unsigned short port;          /* Destination port for peer */
 614   char *host;                   /* Printable address of the peer. */
 615   union sockunion su;           /* Sockunion address of the peer. */
 616 #define BGP_PEER_SU_UNSPEC(peer) (peer->su.sa.sa_family == AF_UNSPEC)
 617   time_t uptime;                /* Last Up/Down time */
 618   time_t readtime;              /* Last read time */
 619   time_t resettime;             /* Last reset time */
 620
 621   ifindex_t ifindex;            /* ifindex of the BGP connection. */
 622   char *conf_if;                /* neighbor interface config name. */
 623   struct interface *ifp;        /* corresponding interface */
 624   char *ifname;                 /* bind interface name. */
 625   char *update_if;
 626   union sockunion *update_source;
 627
 628   union sockunion *su_local;    /* Sockunion of local address.  */
 629   union sockunion *su_remote;   /* Sockunion of remote address.  */
 630   int shared_network;           /* Is this peer shared same network. */
 631   struct bgp_nexthop nexthop;   /* Nexthop */
 632
 633   /* Peer address family configuration. */
 634   u_char afc[AFI_MAX][SAFI_MAX];
 635   u_char afc_nego[AFI_MAX][SAFI_MAX];
 636   u_char afc_adv[AFI_MAX][SAFI_MAX];
 637   u_char afc_recv[AFI_MAX][SAFI_MAX];
 638
 639   /* Capability flags (reset in bgp_stop) */
 640   u_int32_t cap;
 641 #define PEER_CAP_REFRESH_ADV                (1 << 0) /* refresh advertised */
 642 #define PEER_CAP_REFRESH_OLD_RCV            (1 << 1) /* refresh old received */
 643 #define PEER_CAP_REFRESH_NEW_RCV            (1 << 2) /* refresh rfc received */
 644 #define PEER_CAP_DYNAMIC_ADV                (1 << 3) /* dynamic advertised */
 645 #define PEER_CAP_DYNAMIC_RCV                (1 << 4) /* dynamic received */
 646 #define PEER_CAP_RESTART_ADV                (1 << 5) /* restart advertised */
 647 #define PEER_CAP_RESTART_RCV                (1 << 6) /* restart received */
 648 #define PEER_CAP_AS4_ADV                    (1 << 7) /* as4 advertised */
 649 #define PEER_CAP_AS4_RCV                    (1 << 8) /* as4 received */
 650 #define PEER_CAP_RESTART_BIT_ADV            (1 << 9) /* sent restart state */
 651 #define PEER_CAP_RESTART_BIT_RCV            (1 << 10) /* peer restart state */
 652 #define PEER_CAP_ADDPATH_ADV                (1 << 11) /* addpath advertised */
 653 #define PEER_CAP_ADDPATH_RCV                (1 << 12) /* addpath received */
 654 #define PEER_CAP_ENHE_ADV                   (1 << 13) /* Extended nexthop advertised */
 655 #define PEER_CAP_ENHE_RCV                   (1 << 14) /* Extended nexthop received */
 656 #define PEER_CAP_HOSTNAME_ADV               (1 << 15) /* hostname advertised */
 657 #define PEER_CAP_HOSTNAME_RCV               (1 << 16) /* hostname received */
 658
 659   /* Capability flags (reset in bgp_stop) */
 660   u_int32_t af_cap[AFI_MAX][SAFI_MAX];
 661 #define PEER_CAP_ORF_PREFIX_SM_ADV          (1 << 0) /* send-mode advertised */
 662 #define PEER_CAP_ORF_PREFIX_RM_ADV          (1 << 1) /* receive-mode advertised */
 663 #define PEER_CAP_ORF_PREFIX_SM_RCV          (1 << 2) /* send-mode received */
 664 #define PEER_CAP_ORF_PREFIX_RM_RCV          (1 << 3) /* receive-mode received */
 665 #define PEER_CAP_ORF_PREFIX_SM_OLD_RCV      (1 << 4) /* send-mode received */
 666 #define PEER_CAP_ORF_PREFIX_RM_OLD_RCV      (1 << 5) /* receive-mode received */
 667 #define PEER_CAP_RESTART_AF_RCV             (1 << 6) /* graceful restart afi/safi received */
 668 #define PEER_CAP_RESTART_AF_PRESERVE_RCV    (1 << 7) /* graceful restart afi/safi F-bit received */
 669 #define PEER_CAP_ADDPATH_AF_TX_ADV          (1 << 8) /* addpath tx advertised */
 670 #define PEER_CAP_ADDPATH_AF_TX_RCV          (1 << 9) /* addpath tx received */
 671 #define PEER_CAP_ADDPATH_AF_RX_ADV          (1 << 10) /* addpath rx advertised */
 672 #define PEER_CAP_ADDPATH_AF_RX_RCV          (1 << 11) /* addpath rx received */
 673 #define PEER_CAP_ENHE_AF_ADV                (1 << 12) /* Extended nexthopi afi/safi advertised */
 674 #define PEER_CAP_ENHE_AF_RCV                (1 << 13) /* Extended nexthop afi/safi received */
 675 #define PEER_CAP_ENHE_AF_NEGO               (1 << 14) /* Extended nexthop afi/safi negotiated */
 676
 677   /* Global configuration flags. */
 678   u_int32_t flags;
 679 #define PEER_FLAG_PASSIVE                   (1 << 0) /* passive mode */
 680 #define PEER_FLAG_SHUTDOWN                  (1 << 1) /* shutdown */
 681 #define PEER_FLAG_DONT_CAPABILITY           (1 << 2) /* dont-capability */
 682 #define PEER_FLAG_OVERRIDE_CAPABILITY       (1 << 3) /* override-capability */
 683 #define PEER_FLAG_STRICT_CAP_MATCH          (1 << 4) /* strict-match */
 684 #define PEER_FLAG_DYNAMIC_CAPABILITY        (1 << 5) /* dynamic capability */
 685 #define PEER_FLAG_DISABLE_CONNECTED_CHECK   (1 << 6) /* disable-connected-check */
 686 #define PEER_FLAG_LOCAL_AS_NO_PREPEND       (1 << 7) /* local-as no-prepend */
 687 #define PEER_FLAG_LOCAL_AS_REPLACE_AS       (1 << 8) /* local-as no-prepend replace-as */
 688 #define PEER_FLAG_DELETE                    (1 << 9) /* mark the peer for deleting */
 689 #define PEER_FLAG_CONFIG_NODE               (1 << 10) /* the node to update configs on */
 690 #define PEER_FLAG_LONESOUL                  (1 << 11)
 691 #define PEER_FLAG_DYNAMIC_NEIGHBOR          (1 << 12) /* dynamic neighbor */
 692 #define PEER_FLAG_CAPABILITY_ENHE           (1 << 13) /* Extended next-hop (rfc 5549)*/
 693 #define PEER_FLAG_IFPEER_V6ONLY             (1 << 14) /* if-based peer is v6 only */
 694 #if ENABLE_BGP_VNC
 695 #define PEER_FLAG_IS_RFAPI_HD               (1 << 15) /* attached to rfapi HD */
 696 #endif
 697   /* outgoing message sent in CEASE_ADMIN_SHUTDOWN notify */
 698   char *tx_shutdown_message;
 699
 700   /* NSF mode (graceful restart) */
 701   u_char nsf[AFI_MAX][SAFI_MAX];
 702
 703   /* Per AF configuration flags. */
 704   u_int32_t af_flags[AFI_MAX][SAFI_MAX];
 705 #define PEER_FLAG_SEND_COMMUNITY            (1 << 0) /* send-community */
 706 #define PEER_FLAG_SEND_EXT_COMMUNITY        (1 << 1) /* send-community ext. */
 707 #define PEER_FLAG_NEXTHOP_SELF              (1 << 2) /* next-hop-self */
 708 #define PEER_FLAG_REFLECTOR_CLIENT          (1 << 3) /* reflector-client */
 709 #define PEER_FLAG_RSERVER_CLIENT            (1 << 4) /* route-server-client */
 710 #define PEER_FLAG_SOFT_RECONFIG             (1 << 5) /* soft-reconfiguration */
 711 #define PEER_FLAG_AS_PATH_UNCHANGED         (1 << 6) /* transparent-as */
 712 #define PEER_FLAG_NEXTHOP_UNCHANGED         (1 << 7) /* transparent-next-hop */
 713 #define PEER_FLAG_MED_UNCHANGED             (1 << 8) /* transparent-next-hop */
 714 #define PEER_FLAG_DEFAULT_ORIGINATE         (1 << 9) /* default-originate */
 715 #define PEER_FLAG_REMOVE_PRIVATE_AS         (1 << 10) /* remove-private-as */
 716 #define PEER_FLAG_ALLOWAS_IN                (1 << 11) /* set allowas-in */
 717 #define PEER_FLAG_ORF_PREFIX_SM             (1 << 12) /* orf capability send-mode */
 718 #define PEER_FLAG_ORF_PREFIX_RM             (1 << 13) /* orf capability receive-mode */
 719 #define PEER_FLAG_MAX_PREFIX                (1 << 14) /* maximum prefix */
 720 #define PEER_FLAG_MAX_PREFIX_WARNING        (1 << 15) /* maximum prefix warning-only */
 721 #define PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED   (1 << 16) /* leave link-local nexthop unchanged */
 722 #define PEER_FLAG_FORCE_NEXTHOP_SELF        (1 << 17) /* next-hop-self force */
 723 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL     (1 << 18) /* remove-private-as all */
 724 #define PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE (1 << 19) /* remove-private-as replace-as */
 725 #define PEER_FLAG_AS_OVERRIDE               (1 << 20) /* as-override */
 726 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE (1 << 21) /* remove-private-as all replace-as */
 727 #define PEER_FLAG_ADDPATH_TX_ALL_PATHS      (1 << 22) /* addpath-tx-all-paths */
 728 #define PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS (1 << 23) /* addpath-tx-bestpath-per-AS */
 729 #define PEER_FLAG_WEIGHT                    (1 << 24) /* weight */
 730 #define PEER_FLAG_ALLOWAS_IN_ORIGIN         (1 << 25) /* allowas-in origin */
 731 #define PEER_FLAG_SEND_LARGE_COMMUNITY      (1 << 26) /* Send large Communities */
 732
 733   /* MD5 password */
 734   char *password;
 735
 736   /* default-originate route-map.  */
 737   struct
 738   {
 739     char *name;
 740     struct route_map *map;
 741   } default_rmap[AFI_MAX][SAFI_MAX];
 742
 743   /* Peer status flags. */
 744   u_int16_t sflags;
 745 #define PEER_STATUS_ACCEPT_PEER       (1 << 0) /* accept peer */
 746 #define PEER_STATUS_PREFIX_OVERFLOW   (1 << 1) /* prefix-overflow */
 747 #define PEER_STATUS_CAPABILITY_OPEN   (1 << 2) /* capability open send */
 748 #define PEER_STATUS_HAVE_ACCEPT       (1 << 3) /* accept peer's parent */
 749 #define PEER_STATUS_GROUP             (1 << 4) /* peer-group conf */
 750 #define PEER_STATUS_NSF_MODE          (1 << 5) /* NSF aware peer */
 751 #define PEER_STATUS_NSF_WAIT          (1 << 6) /* wait comeback peer */
 752
 753   /* Peer status af flags (reset in bgp_stop) */
 754   u_int16_t af_sflags[AFI_MAX][SAFI_MAX];
 755 #define PEER_STATUS_ORF_PREFIX_SEND   (1 << 0) /* prefix-list send peer */
 756 #define PEER_STATUS_ORF_WAIT_REFRESH  (1 << 1) /* wait refresh received peer */
 757 #define PEER_STATUS_PREFIX_THRESHOLD  (1 << 2) /* exceed prefix-threshold */
 758 #define PEER_STATUS_PREFIX_LIMIT      (1 << 3) /* exceed prefix-limit */
 759 #define PEER_STATUS_EOR_SEND          (1 << 4) /* end-of-rib send to peer */
 760 #define PEER_STATUS_EOR_RECEIVED      (1 << 5) /* end-of-rib received from peer */
 761
 762   /* Default attribute value for the peer. */
 763   u_int32_t config;
 764 #define PEER_CONFIG_TIMER             (1 << 0) /* keepalive & holdtime */
 765 #define PEER_CONFIG_CONNECT           (1 << 1) /* connect */
 766 #define PEER_CONFIG_ROUTEADV          (1 << 2) /* route advertise */
 767
 768   u_int32_t holdtime;
 769   u_int32_t keepalive;
 770   u_int32_t connect;
 771   u_int32_t routeadv;
 772
 773   /* Timer values. */
 774   u_int32_t v_start;
 775   u_int32_t v_connect;
 776   u_int32_t v_holdtime;
 777   u_int32_t v_keepalive;
 778   u_int32_t v_routeadv;
 779   u_int32_t v_pmax_restart;
 780   u_int32_t v_gr_restart;
 781
 782   /* Threads. */
 783   struct thread *t_read;
 784   struct thread *t_write;
 785   struct thread *t_start;
 786   struct thread *t_connect;
 787   struct thread *t_holdtime;
 788   struct thread *t_keepalive;
 789   struct thread *t_routeadv;
 790   struct thread *t_pmax_restart;
 791   struct thread *t_gr_restart;
 792   struct thread *t_gr_stale;
 793
 794   /* workqueues */
 795   struct work_queue *clear_node_queue;
 796
 797   /* Statistics field */
 798   u_int32_t open_in;            /* Open message input count */
 799   u_int32_t open_out;           /* Open message output count */
 800   u_int32_t update_in;          /* Update message input count */
 801   u_int32_t update_out;         /* Update message ouput count */
 802   time_t update_time;           /* Update message received time. */
 803   u_int32_t keepalive_in;       /* Keepalive input count */
 804   u_int32_t keepalive_out;      /* Keepalive output count */
 805   u_int32_t notify_in;          /* Notify input count */
 806   u_int32_t notify_out;         /* Notify output count */
 807   u_int32_t refresh_in;         /* Route Refresh input count */
 808   u_int32_t refresh_out;        /* Route Refresh output count */
 809   u_int32_t dynamic_cap_in;     /* Dynamic Capability input count.  */
 810   u_int32_t dynamic_cap_out;    /* Dynamic Capability output count.  */
 811
 812   /* BGP state count */
 813   u_int32_t established;        /* Established */
 814   u_int32_t dropped;            /* Dropped */
 815
 816   /* Update delay related fields */
 817   u_char    update_delay_over;  /* When this is set, BGP is no more waiting for EOR */
 818
 819   /* Syncronization list and time.  */
 820   struct bgp_synchronize *sync[AFI_MAX][SAFI_MAX];
 821   time_t synctime;
 822   time_t last_write;  /* timestamp when the last msg was written */
 823   time_t last_update;  /* timestamp when the last UPDATE msg was written */
 824
 825   /* Send prefix count. */
 826   unsigned long scount[AFI_MAX][SAFI_MAX];
 827
 828   /* Announcement attribute hash.  */
 829   struct hash *hash[AFI_MAX][SAFI_MAX];
 830
 831   /* Notify data. */
 832   struct bgp_notify notify;
 833
 834   /* Whole packet size to be read. */
 835   unsigned long packet_size;
 836
 837   /* Filter structure. */
 838   struct bgp_filter filter[AFI_MAX][SAFI_MAX];
 839
 840   /* ORF Prefix-list */
 841   struct prefix_list *orf_plist[AFI_MAX][SAFI_MAX];
 842
 843   /* Text description of last attribute rcvd */
 844   char rcvd_attr_str[BUFSIZ];
 845
 846   /* Track if we printed the attribute in debugs */
 847   int rcvd_attr_printed;
 848
 849   /* Prefix count. */
 850   unsigned long pcount[AFI_MAX][SAFI_MAX];
 851
 852   /* Max prefix count. */
 853   unsigned long pmax[AFI_MAX][SAFI_MAX];
 854   u_char pmax_threshold[AFI_MAX][SAFI_MAX];
 855   u_int16_t pmax_restart[AFI_MAX][SAFI_MAX];
 856 #define MAXIMUM_PREFIX_THRESHOLD_DEFAULT 75
 857
 858   /* allowas-in. */
 859   char allowas_in[AFI_MAX][SAFI_MAX];
 860
 861   /* weight */
 862   unsigned long weight[AFI_MAX][SAFI_MAX];
 863
 864   /* peer reset cause */
 865   char last_reset;
 866 #define PEER_DOWN_RID_CHANGE             1 /* bgp router-id command */
 867 #define PEER_DOWN_REMOTE_AS_CHANGE       2 /* neighbor remote-as command */
 868 #define PEER_DOWN_LOCAL_AS_CHANGE        3 /* neighbor local-as command */
 869 #define PEER_DOWN_CLID_CHANGE            4 /* bgp cluster-id command */
 870 #define PEER_DOWN_CONFED_ID_CHANGE       5 /* bgp confederation identifier command */
 871 #define PEER_DOWN_CONFED_PEER_CHANGE     6 /* bgp confederation peer command */
 872 #define PEER_DOWN_RR_CLIENT_CHANGE       7 /* neighbor route-reflector-client command */
 873 #define PEER_DOWN_RS_CLIENT_CHANGE       8 /* neighbor route-server-client command */
 874 #define PEER_DOWN_UPDATE_SOURCE_CHANGE   9 /* neighbor update-source command */
 875 #define PEER_DOWN_AF_ACTIVATE           10 /* neighbor activate command */
 876 #define PEER_DOWN_USER_SHUTDOWN         11 /* neighbor shutdown command */
 877 #define PEER_DOWN_USER_RESET            12 /* clear ip bgp command */
 878 #define PEER_DOWN_NOTIFY_RECEIVED       13 /* notification received */
 879 #define PEER_DOWN_NOTIFY_SEND           14 /* notification send */
 880 #define PEER_DOWN_CLOSE_SESSION         15 /* tcp session close */
 881 #define PEER_DOWN_NEIGHBOR_DELETE       16 /* neghbor delete */
 882 #define PEER_DOWN_RMAP_BIND             17 /* neghbor peer-group command */
 883 #define PEER_DOWN_RMAP_UNBIND           18 /* no neighbor peer-group command */
 884 #define PEER_DOWN_CAPABILITY_CHANGE     19 /* neighbor capability command */
 885 #define PEER_DOWN_PASSIVE_CHANGE        20 /* neighbor passive command */
 886 #define PEER_DOWN_MULTIHOP_CHANGE       21 /* neighbor multihop command */
 887 #define PEER_DOWN_NSF_CLOSE_SESSION     22 /* NSF tcp session close */
 888 #define PEER_DOWN_V6ONLY_CHANGE         23 /* if-based peering v6only toggled */
 889 #define PEER_DOWN_BFD_DOWN              24 /* BFD down */
 890 #define PEER_DOWN_IF_DOWN               25 /* Interface down */
 891 #define PEER_DOWN_NBR_ADDR_DEL          26 /* Peer address lost */
 892 unsigned long last_reset_cause_size;
 893 u_char last_reset_cause[BGP_MAX_PACKET_SIZE];
 894
 895   /* The kind of route-map Flags.*/
 896   u_char rmap_type;
 897 #define PEER_RMAP_TYPE_IN             (1 << 0) /* neighbor route-map in */
 898 #define PEER_RMAP_TYPE_OUT            (1 << 1) /* neighbor route-map out */
 899 #define PEER_RMAP_TYPE_NETWORK        (1 << 2) /* network route-map */
 900 #define PEER_RMAP_TYPE_REDISTRIBUTE   (1 << 3) /* redistribute route-map */
 901 #define PEER_RMAP_TYPE_DEFAULT        (1 << 4) /* default-originate route-map */
 902 #define PEER_RMAP_TYPE_NOSET          (1 << 5) /* not allow to set commands */
 903 #define PEER_RMAP_TYPE_IMPORT         (1 << 6) /* neighbor route-map import */
 904 #define PEER_RMAP_TYPE_EXPORT         (1 << 7) /* neighbor route-map export */
 905
 906   /* peer specific BFD information */
 907   struct bfd_info *bfd_info;
 908
 909   /* hostname and domainname advertised by host */
 910   char *hostname;
 911   char *domainname;
 912
 913   QOBJ_FIELDS
 914 };
 915 DECLARE_QOBJ_TYPE(peer)
 916
 917 /* Check if suppress start/restart of sessions to peer. */
 918 #define BGP_PEER_START_SUPPRESSED(P) \
 919   (CHECK_FLAG ((P)->flags, PEER_FLAG_SHUTDOWN) \
 920    || CHECK_FLAG ((P)->sflags, PEER_STATUS_PREFIX_OVERFLOW))
 921
 922 #define PEER_PASSWORD_MINLEN    (1)
 923 #define PEER_PASSWORD_MAXLEN    (80)
 924
 925 /* This structure's member directly points incoming packet data
 926    stream. */
 927 struct bgp_nlri
 928 {
 929   /* AFI.  */
 930   afi_t afi;
 931
 932   /* SAFI.  */
 933   safi_t safi;
 934
 935   /* Pointer to NLRI byte stream.  */
 936   u_char *nlri;
 937
 938   /* Length of whole NLRI.  */
 939   bgp_size_t length;
 940 };
 941
 942 /* BGP versions.  */
 943 #define BGP_VERSION_4                            4
 944
 945 /* Default BGP port number.  */
 946 #define BGP_PORT_DEFAULT                       179
 947
 948 /* BGP minimum message size.  */
 949 #define BGP_MSG_OPEN_MIN_SIZE                   (BGP_HEADER_SIZE + 10)
 950 #define BGP_MSG_UPDATE_MIN_SIZE                 (BGP_HEADER_SIZE + 4)
 951 #define BGP_MSG_NOTIFY_MIN_SIZE                 (BGP_HEADER_SIZE + 2)
 952 #define BGP_MSG_KEEPALIVE_MIN_SIZE              (BGP_HEADER_SIZE + 0)
 953 #define BGP_MSG_ROUTE_REFRESH_MIN_SIZE          (BGP_HEADER_SIZE + 4)
 954 #define BGP_MSG_CAPABILITY_MIN_SIZE             (BGP_HEADER_SIZE + 3)
 955
 956 /* BGP message types.  */
 957 #define BGP_MSG_OPEN                             1
 958 #define BGP_MSG_UPDATE                           2
 959 #define BGP_MSG_NOTIFY                           3
 960 #define BGP_MSG_KEEPALIVE                        4
 961 #define BGP_MSG_ROUTE_REFRESH_NEW                5
 962 #define BGP_MSG_CAPABILITY                       6
 963 #define BGP_MSG_ROUTE_REFRESH_OLD              128
 964
 965 /* BGP open optional parameter.  */
 966 #define BGP_OPEN_OPT_AUTH                        1
 967 #define BGP_OPEN_OPT_CAP                         2
 968
 969 /* BGP4 attribute type codes.  */
 970 #define BGP_ATTR_ORIGIN                          1
 971 #define BGP_ATTR_AS_PATH                         2
 972 #define BGP_ATTR_NEXT_HOP                        3
 973 #define BGP_ATTR_MULTI_EXIT_DISC                 4
 974 #define BGP_ATTR_LOCAL_PREF                      5
 975 #define BGP_ATTR_ATOMIC_AGGREGATE                6
 976 #define BGP_ATTR_AGGREGATOR                      7
 977 #define BGP_ATTR_COMMUNITIES                     8
 978 #define BGP_ATTR_ORIGINATOR_ID                   9
 979 #define BGP_ATTR_CLUSTER_LIST                   10
 980 #define BGP_ATTR_DPA                            11
 981 #define BGP_ATTR_ADVERTISER                     12
 982 #define BGP_ATTR_RCID_PATH                      13
 983 #define BGP_ATTR_MP_REACH_NLRI                  14
 984 #define BGP_ATTR_MP_UNREACH_NLRI                15
 985 #define BGP_ATTR_EXT_COMMUNITIES                16
 986 #define BGP_ATTR_AS4_PATH                       17
 987 #define BGP_ATTR_AS4_AGGREGATOR                 18
 988 #define BGP_ATTR_AS_PATHLIMIT                   21
 989 #define BGP_ATTR_ENCAP                          23
 990 #define BGP_ATTR_LARGE_COMMUNITIES              32
 991 #define BGP_ATTR_PREFIX_SID                     40
 992 #if ENABLE_BGP_VNC
 993 #define BGP_ATTR_VNC                           255
 994 #endif
 995
 996 /* BGP update origin.  */
 997 #define BGP_ORIGIN_IGP                           0
 998 #define BGP_ORIGIN_EGP                           1
 999 #define BGP_ORIGIN_INCOMPLETE                    2
1000
1001 /* BGP notify message codes.  */
1002 #define BGP_NOTIFY_HEADER_ERR                    1
1003 #define BGP_NOTIFY_OPEN_ERR                      2
1004 #define BGP_NOTIFY_UPDATE_ERR                    3
1005 #define BGP_NOTIFY_HOLD_ERR                      4
1006 #define BGP_NOTIFY_FSM_ERR                       5
1007 #define BGP_NOTIFY_CEASE                         6
1008 #define BGP_NOTIFY_CAPABILITY_ERR                7
1009
1010 #define BGP_NOTIFY_SUBCODE_UNSPECIFIC            0
1011
1012 /* BGP_NOTIFY_HEADER_ERR sub codes.  */
1013 #define BGP_NOTIFY_HEADER_NOT_SYNC               1
1014 #define BGP_NOTIFY_HEADER_BAD_MESLEN             2
1015 #define BGP_NOTIFY_HEADER_BAD_MESTYPE            3
1016
1017 /* BGP_NOTIFY_OPEN_ERR sub codes.  */
1018 #define BGP_NOTIFY_OPEN_MALFORMED_ATTR           0
1019 #define BGP_NOTIFY_OPEN_UNSUP_VERSION            1
1020 #define BGP_NOTIFY_OPEN_BAD_PEER_AS              2
1021 #define BGP_NOTIFY_OPEN_BAD_BGP_IDENT            3
1022 #define BGP_NOTIFY_OPEN_UNSUP_PARAM              4
1023 #define BGP_NOTIFY_OPEN_AUTH_FAILURE             5
1024 #define BGP_NOTIFY_OPEN_UNACEP_HOLDTIME          6
1025 #define BGP_NOTIFY_OPEN_UNSUP_CAPBL              7
1026
1027 /* BGP_NOTIFY_UPDATE_ERR sub codes.  */
1028 #define BGP_NOTIFY_UPDATE_MAL_ATTR               1
1029 #define BGP_NOTIFY_UPDATE_UNREC_ATTR             2
1030 #define BGP_NOTIFY_UPDATE_MISS_ATTR              3
1031 #define BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR          4
1032 #define BGP_NOTIFY_UPDATE_ATTR_LENG_ERR          5
1033 #define BGP_NOTIFY_UPDATE_INVAL_ORIGIN           6
1034 #define BGP_NOTIFY_UPDATE_AS_ROUTE_LOOP          7
1035 #define BGP_NOTIFY_UPDATE_INVAL_NEXT_HOP         8
1036 #define BGP_NOTIFY_UPDATE_OPT_ATTR_ERR           9
1037 #define BGP_NOTIFY_UPDATE_INVAL_NETWORK         10
1038 #define BGP_NOTIFY_UPDATE_MAL_AS_PATH           11
1039
1040 /* BGP_NOTIFY_CEASE sub codes (RFC 4486).  */
1041 #define BGP_NOTIFY_CEASE_MAX_PREFIX              1
1042 #define BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN          2
1043 #define BGP_NOTIFY_CEASE_PEER_UNCONFIG           3
1044 #define BGP_NOTIFY_CEASE_ADMIN_RESET             4
1045 #define BGP_NOTIFY_CEASE_CONNECT_REJECT          5
1046 #define BGP_NOTIFY_CEASE_CONFIG_CHANGE           6
1047 #define BGP_NOTIFY_CEASE_COLLISION_RESOLUTION    7
1048 #define BGP_NOTIFY_CEASE_OUT_OF_RESOURCE         8
1049
1050 /* BGP_NOTIFY_CAPABILITY_ERR sub codes (draft-ietf-idr-dynamic-cap-02). */
1051 #define BGP_NOTIFY_CAPABILITY_INVALID_ACTION     1
1052 #define BGP_NOTIFY_CAPABILITY_INVALID_LENGTH     2
1053 #define BGP_NOTIFY_CAPABILITY_MALFORMED_CODE     3
1054
1055 /* BGP finite state machine status.  */
1056 #define Idle                                     1
1057 #define Connect                                  2
1058 #define Active                                   3
1059 #define OpenSent                                 4
1060 #define OpenConfirm                              5
1061 #define Established                              6
1062 #define Clearing                                 7
1063 #define Deleted                                  8
1064 #define BGP_STATUS_MAX                           9
1065
1066 /* BGP finite state machine events.  */
1067 #define BGP_Start                                1
1068 #define BGP_Stop                                 2
1069 #define TCP_connection_open                      3
1070 #define TCP_connection_closed                    4
1071 #define TCP_connection_open_failed               5
1072 #define TCP_fatal_error                          6
1073 #define ConnectRetry_timer_expired               7
1074 #define Hold_Timer_expired                       8
1075 #define KeepAlive_timer_expired                  9
1076 #define Receive_OPEN_message                    10
1077 #define Receive_KEEPALIVE_message               11
1078 #define Receive_UPDATE_message                  12
1079 #define Receive_NOTIFICATION_message            13
1080 #define Clearing_Completed                      14
1081 #define BGP_EVENTS_MAX                          15
1082
1083 /* BGP timers default value.  */
1084 /* note: the DFLT_ ones depend on compile-time "defaults" selection */
1085 #define BGP_INIT_START_TIMER                     1
1086 #define BGP_DEFAULT_HOLDTIME                      DFLT_BGP_HOLDTIME
1087 #define BGP_DEFAULT_KEEPALIVE                     DFLT_BGP_KEEPALIVE
1088 #define BGP_DEFAULT_EBGP_ROUTEADV                0
1089 #define BGP_DEFAULT_IBGP_ROUTEADV                0
1090 #define BGP_DEFAULT_CONNECT_RETRY                 DFLT_BGP_TIMERS_CONNECT
1091
1092 /* BGP default local preference.  */
1093 #define BGP_DEFAULT_LOCAL_PREF                 100
1094
1095 /* BGP default subgroup packet queue max .  */
1096 #define BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX      40
1097
1098 /* BGP graceful restart  */
1099 #define BGP_DEFAULT_RESTART_TIME               120
1100 #define BGP_DEFAULT_STALEPATH_TIME             360
1101
1102 /* BGP uptime string length.  */
1103 #define BGP_UPTIME_LEN 25
1104
1105 /* Default configuration settings for bgpd.  */
1106 #define BGP_VTY_PORT                          2605
1107 #define BGP_DEFAULT_CONFIG             "bgpd.conf"
1108
1109 /* Check AS path loop when we send NLRI.  */
1110 /* #define BGP_SEND_ASPATH_CHECK */
1111
1112 /* BGP Dynamic Neighbors feature */
1113 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT    100
1114 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MIN          1
1115 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MAX       5000
1116
1117 /* Flag for peer_clear_soft().  */
1118 enum bgp_clear_type
1119 {
1120   BGP_CLEAR_SOFT_NONE,
1121   BGP_CLEAR_SOFT_OUT,
1122   BGP_CLEAR_SOFT_IN,
1123   BGP_CLEAR_SOFT_BOTH,
1124   BGP_CLEAR_SOFT_IN_ORF_PREFIX
1125 };
1126
1127 /* Macros. */
1128 #define BGP_INPUT(P)         ((P)->ibuf)
1129 #define BGP_INPUT_PNT(P)     (STREAM_PNT(BGP_INPUT(P)))
1130 #define BGP_IS_VALID_STATE_FOR_NOTIF(S)\
1131         (((S) == OpenSent) || ((S) == OpenConfirm) || ((S) == Established))
1132
1133 /* BGP error codes.  */
1134 #define BGP_SUCCESS                               0
1135 #define BGP_ERR_INVALID_VALUE                    -1
1136 #define BGP_ERR_INVALID_FLAG                     -2
1137 #define BGP_ERR_INVALID_AS                       -3
1138 #define BGP_ERR_INVALID_BGP                      -4
1139 #define BGP_ERR_PEER_GROUP_MEMBER                -5
1140 #define BGP_ERR_MULTIPLE_INSTANCE_USED           -6
1141 #define BGP_ERR_PEER_GROUP_NO_REMOTE_AS          -7
1142 #define BGP_ERR_PEER_GROUP_CANT_CHANGE           -8
1143 #define BGP_ERR_PEER_GROUP_MISMATCH              -9
1144 #define BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT  -10
1145 #define BGP_ERR_MULTIPLE_INSTANCE_NOT_SET       -11
1146 #define BGP_ERR_AS_MISMATCH                     -12
1147 #define BGP_ERR_PEER_FLAG_CONFLICT              -13
1148 #define BGP_ERR_PEER_GROUP_SHUTDOWN             -14
1149 #define BGP_ERR_PEER_FILTER_CONFLICT            -15
1150 #define BGP_ERR_NOT_INTERNAL_PEER               -16
1151 #define BGP_ERR_REMOVE_PRIVATE_AS               -17
1152 #define BGP_ERR_AF_UNCONFIGURED                 -18
1153 #define BGP_ERR_SOFT_RECONFIG_UNCONFIGURED      -19
1154 #define BGP_ERR_INSTANCE_MISMATCH               -20
1155 #define BGP_ERR_LOCAL_AS_ALLOWED_ONLY_FOR_EBGP  -21
1156 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS    -22
1157 #define BGP_ERR_TCPSIG_FAILED                   -23
1158 #define BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK   -24
1159 #define BGP_ERR_NO_IBGP_WITH_TTLHACK            -25
1160 #define BGP_ERR_NO_INTERFACE_CONFIG             -26
1161 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS_REMOTE_AS    -27
1162 #define BGP_ERR_AS_OVERRIDE                     -28
1163 #define BGP_ERR_INVALID_DYNAMIC_NEIGHBORS_LIMIT -29
1164 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_EXISTS  -30
1165 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_NOT_FOUND -31
1166 #define BGP_ERR_INVALID_FOR_DYNAMIC_PEER        -32
1167 #define BGP_ERR_MAX                             -33
1168 #define BGP_ERR_INVALID_FOR_DIRECT_PEER         -34
1169 #define BGP_ERR_PEER_SAFI_CONFLICT              -35
1170
1171 /*
1172  * Enumeration of different policy kinds a peer can be configured with.
1173  */
1174 typedef enum
1175 {
1176   BGP_POLICY_ROUTE_MAP,
1177   BGP_POLICY_FILTER_LIST,
1178   BGP_POLICY_PREFIX_LIST,
1179   BGP_POLICY_DISTRIBUTE_LIST,
1180 } bgp_policy_type_e;
1181
1182 extern struct bgp_master *bm;
1183 extern unsigned int multipath_num;
1184
1185 /* Prototypes. */
1186 extern void bgp_terminate (void);
1187 extern void bgp_reset (void);
1188 extern time_t bgp_clock (void);
1189 extern void bgp_zclient_reset (void);
1190 extern int bgp_nexthop_set (union sockunion *, union sockunion *,
1191                      struct bgp_nexthop *, struct peer *);
1192 extern struct bgp *bgp_get_default (void);
1193 extern struct bgp *bgp_lookup (as_t, const char *);
1194 extern struct bgp *bgp_lookup_by_name (const char *);
1195 extern struct bgp *bgp_lookup_by_vrf_id (vrf_id_t);
1196 extern struct peer *peer_lookup (struct bgp *, union sockunion *);
1197 extern struct peer *peer_lookup_by_conf_if (struct bgp *, const char *);
1198 extern struct peer *peer_lookup_by_hostname(struct bgp *, const char *);
1199 extern void  bgp_peer_conf_if_to_su_update (struct peer *);
1200 extern int peer_group_listen_range_del(struct peer_group *, struct prefix *);
1201 extern struct peer_group *peer_group_lookup (struct bgp *, const char *);
1202 extern struct peer_group *peer_group_get (struct bgp *, const char *);
1203 extern struct peer *peer_create_bind_dynamic_neighbor (struct bgp *,
1204                     union sockunion *, struct peer_group *);
1205 extern struct prefix *peer_group_lookup_dynamic_neighbor_range (
1206                      struct peer_group *, struct prefix *);
1207 extern struct peer_group *peer_group_lookup_dynamic_neighbor (struct bgp *,
1208                      struct prefix *, struct prefix **);
1209 extern struct peer *peer_lookup_dynamic_neighbor (struct bgp *,
1210                      union sockunion *);
1211 extern void peer_drop_dynamic_neighbor (struct peer *);
1212
1213 /*
1214  * Peers are incredibly easy to memory leak
1215  * due to the various ways that they are actually used
1216  * Provide some functionality to debug locks and unlocks
1217  */
1218 extern struct peer *peer_lock_with_caller(const char *, struct peer *);
1219 extern struct peer *peer_unlock_with_caller(const char *, struct peer *);
1220 #define peer_unlock(A) peer_unlock_with_caller(__FUNCTION__, (A))
1221 #define peer_lock(B) peer_lock_with_caller(__FUNCTION__, (B))
1222
1223 extern bgp_peer_sort_t peer_sort (struct peer *peer);
1224 extern int peer_active (struct peer *);
1225 extern int peer_active_nego (struct peer *);
1226 extern void bgp_recalculate_all_bestpaths (struct bgp *bgp);
1227 extern struct peer *peer_create(union sockunion *, const char *, struct bgp *,
1228                                 as_t, as_t, int, afi_t, safi_t, struct peer_group *);
1229 extern struct peer *peer_create_accept (struct bgp *);
1230 extern void peer_xfer_config (struct peer *dst, struct peer *src);
1231 extern char *peer_uptime (time_t, char *, size_t, u_char, json_object *);
1232
1233 extern int bgp_config_write (struct vty *);
1234 extern void bgp_config_write_family_header (struct vty *, afi_t, safi_t, int *);
1235
1236 extern void bgp_master_init (struct thread_master *master);
1237
1238 extern void bgp_init (void);
1239 extern void bgp_route_map_init (void);
1240 extern void bgp_session_reset (struct peer *);
1241
1242 extern int bgp_option_set (int);
1243 extern int bgp_option_unset (int);
1244 extern int bgp_option_check (int);
1245
1246 extern int bgp_get (struct bgp **, as_t *, const char *, enum bgp_instance_type);
1247 extern void bgp_instance_up (struct bgp *);
1248 extern void bgp_instance_down (struct bgp *);
1249 extern int bgp_delete (struct bgp *);
1250
1251 extern int bgp_flag_set (struct bgp *, int);
1252 extern int bgp_flag_unset (struct bgp *, int);
1253 extern int bgp_flag_check (struct bgp *, int);
1254
1255 extern void bgp_lock (struct bgp *);
1256 extern void bgp_unlock (struct bgp *);
1257
1258 extern void bgp_router_id_zebra_bump (vrf_id_t, const struct prefix*);
1259 extern int bgp_router_id_static_set (struct bgp *, struct in_addr);
1260
1261 extern int bgp_cluster_id_set (struct bgp *, struct in_addr *);
1262 extern int bgp_cluster_id_unset (struct bgp *);
1263
1264 extern int bgp_confederation_id_set (struct bgp *, as_t);
1265 extern int bgp_confederation_id_unset (struct bgp *);
1266 extern int bgp_confederation_peers_check (struct bgp *, as_t);
1267
1268 extern int bgp_confederation_peers_add (struct bgp *, as_t);
1269 extern int bgp_confederation_peers_remove (struct bgp *, as_t);
1270
1271 extern int bgp_timers_set (struct bgp *, u_int32_t keepalive, u_int32_t holdtime);
1272 extern int bgp_timers_unset (struct bgp *);
1273
1274 extern int bgp_default_local_preference_set (struct bgp *, u_int32_t);
1275 extern int bgp_default_local_preference_unset (struct bgp *);
1276
1277 extern int bgp_default_subgroup_pkt_queue_max_set (struct bgp *bgp, u_int32_t);
1278 extern int bgp_default_subgroup_pkt_queue_max_unset (struct bgp *bgp);
1279
1280 extern int bgp_listen_limit_set (struct bgp *, int);
1281 extern int bgp_listen_limit_unset (struct bgp *);
1282
1283 extern int bgp_update_delay_active (struct bgp *);
1284 extern int bgp_update_delay_configured (struct bgp *);
1285 extern void peer_as_change (struct peer *, as_t, int);
1286 extern int peer_remote_as (struct bgp *, union sockunion *,const char *, as_t *,
1287                            int, afi_t, safi_t);
1288 extern int peer_group_remote_as (struct bgp *, const char *, as_t *, int);
1289 extern int peer_delete (struct peer *peer);
1290 extern int peer_group_delete (struct peer_group *);
1291 extern int peer_group_remote_as_delete (struct peer_group *);
1292 extern int peer_group_listen_range_add(struct peer_group *, struct prefix *);
1293
1294 extern int peer_activate (struct peer *, afi_t, safi_t);
1295 extern int peer_deactivate (struct peer *, afi_t, safi_t);
1296 extern int peer_afc_set (struct peer *, afi_t, safi_t, int);
1297
1298 extern int peer_group_bind (struct bgp *, union sockunion *, struct peer *,
1299                             struct peer_group *, as_t *);
1300 extern int peer_group_unbind (struct bgp *, struct peer *, struct peer_group *);
1301
1302 extern int peer_flag_set (struct peer *, u_int32_t);
1303 extern int peer_flag_unset (struct peer *, u_int32_t);
1304
1305 extern int peer_af_flag_set (struct peer *, afi_t, safi_t, u_int32_t);
1306 extern int peer_af_flag_unset (struct peer *, afi_t, safi_t, u_int32_t);
1307 extern int peer_af_flag_check (struct peer *, afi_t, safi_t, u_int32_t);
1308
1309 extern int peer_ebgp_multihop_set (struct peer *, int);
1310 extern int peer_ebgp_multihop_unset (struct peer *);
1311 extern int is_ebgp_multihop_configured (struct peer *peer);
1312
1313 extern int peer_description_set (struct peer *, const char *);
1314 extern int peer_description_unset (struct peer *);
1315
1316 extern int peer_update_source_if_set (struct peer *, const char *);
1317 extern int peer_update_source_addr_set (struct peer *, const union sockunion *);
1318 extern int peer_update_source_unset (struct peer *);
1319
1320 extern int peer_default_originate_set (struct peer *, afi_t, safi_t, const char *);
1321 extern int peer_default_originate_unset (struct peer *, afi_t, safi_t);
1322
1323 extern int peer_port_set (struct peer *, u_int16_t);
1324 extern int peer_port_unset (struct peer *);
1325
1326 extern int peer_weight_set (struct peer *, afi_t, safi_t, u_int16_t);
1327 extern int peer_weight_unset (struct peer *, afi_t, safi_t);
1328
1329 extern int peer_timers_set (struct peer *, u_int32_t keepalive, u_int32_t holdtime);
1330 extern int peer_timers_unset (struct peer *);
1331
1332 extern int peer_timers_connect_set (struct peer *, u_int32_t);
1333 extern int peer_timers_connect_unset (struct peer *);
1334
1335 extern int peer_advertise_interval_set (struct peer *, u_int32_t);
1336 extern int peer_advertise_interval_unset (struct peer *);
1337
1338 extern void peer_interface_set (struct peer *, const char *);
1339 extern void peer_interface_unset (struct peer *);
1340
1341 extern int peer_distribute_set (struct peer *, afi_t, safi_t, int, const char *);
1342 extern int peer_distribute_unset (struct peer *, afi_t, safi_t, int);
1343
1344 extern int peer_allowas_in_set (struct peer *, afi_t, safi_t, int, int);
1345 extern int peer_allowas_in_unset (struct peer *, afi_t, safi_t);
1346
1347 extern int peer_local_as_set (struct peer *, as_t, int, int);
1348 extern int peer_local_as_unset (struct peer *);
1349
1350 extern int peer_prefix_list_set (struct peer *, afi_t, safi_t, int, const char *);
1351 extern int peer_prefix_list_unset (struct peer *, afi_t, safi_t, int);
1352
1353 extern int peer_aslist_set (struct peer *, afi_t, safi_t, int, const char *);
1354 extern int peer_aslist_unset (struct peer *,afi_t, safi_t, int);
1355
1356 extern int peer_route_map_set (struct peer *, afi_t, safi_t, int, const char *);
1357 extern int peer_route_map_unset (struct peer *, afi_t, safi_t, int);
1358
1359 extern int peer_unsuppress_map_set (struct peer *, afi_t, safi_t, const char *);
1360
1361 extern int peer_password_set (struct peer *, const char *);
1362 extern int peer_password_unset (struct peer *);
1363
1364 extern int peer_unsuppress_map_unset (struct peer *, afi_t, safi_t);
1365
1366 extern int peer_maximum_prefix_set (struct peer *, afi_t, safi_t, u_int32_t, u_char, int, u_int16_t);
1367 extern int peer_maximum_prefix_unset (struct peer *, afi_t, safi_t);
1368
1369 extern int peer_clear (struct peer *, struct listnode **);
1370 extern int peer_clear_soft (struct peer *, afi_t, safi_t, enum bgp_clear_type);
1371
1372 extern int peer_ttl_security_hops_set (struct peer *, int);
1373 extern int peer_ttl_security_hops_unset (struct peer *);
1374
1375 extern int peer_tx_shutdown_message_set (struct peer *, const char *msg);
1376 extern int peer_tx_shutdown_message_unset (struct peer *);
1377
1378 extern int bgp_route_map_update_timer (struct thread *thread);
1379 extern void bgp_route_map_terminate(void);
1380
1381 extern int peer_cmp (struct peer *p1, struct peer *p2);
1382
1383 extern int
1384 bgp_map_afi_safi_iana2int (iana_afi_t pkt_afi, safi_t pkt_safi,
1385                            afi_t *afi, safi_t *safi);
1386 extern int
1387 bgp_map_afi_safi_int2iana (afi_t afi, safi_t safi,
1388                            iana_afi_t *pkt_afi, safi_t *pkt_safi);
1389
1390 extern struct peer_af * peer_af_create (struct peer *, afi_t, safi_t);
1391 extern struct peer_af * peer_af_find (struct peer *, afi_t, safi_t);
1392 extern int peer_af_delete (struct peer *, afi_t, safi_t);
1393
1394 extern void bgp_close(void);
1395
1396 static inline int
1397 afindex (afi_t afi, safi_t safi)
1398 {
1399   switch (afi)
1400     {
1401     case AFI_IP:
1402       switch (safi)
1403         {
1404         case SAFI_UNICAST:
1405           return BGP_AF_IPV4_UNICAST;
1406           break;
1407         case SAFI_MULTICAST:
1408           return BGP_AF_IPV4_MULTICAST;
1409           break;
1410         case SAFI_LABELED_UNICAST:
1411           return BGP_AF_IPV4_LBL_UNICAST;
1412           break;
1413         case SAFI_MPLS_VPN:
1414           return BGP_AF_IPV4_VPN;
1415           break;
1416         case SAFI_ENCAP:
1417           return BGP_AF_IPV4_ENCAP;
1418           break;
1419         default:
1420           return BGP_AF_MAX;
1421           break;
1422         }
1423       break;
1424     case AFI_IP6:
1425       switch (safi)
1426         {
1427         case SAFI_UNICAST:
1428           return BGP_AF_IPV6_UNICAST;
1429           break;
1430         case SAFI_MULTICAST:
1431           return BGP_AF_IPV6_MULTICAST;
1432           break;
1433         case SAFI_LABELED_UNICAST:
1434           return BGP_AF_IPV6_LBL_UNICAST;
1435           break;
1436         case SAFI_MPLS_VPN:
1437           return BGP_AF_IPV6_VPN;
1438           break;
1439         case SAFI_ENCAP:
1440           return BGP_AF_IPV6_ENCAP;
1441           break;
1442         default:
1443           return BGP_AF_MAX;
1444           break;
1445         }
1446       break;
1447     case AFI_L2VPN:
1448       switch (safi)
1449         {
1450         case SAFI_EVPN:
1451           return BGP_AF_L2VPN_EVPN;
1452           break;
1453         default:
1454           return BGP_AF_MAX;
1455           break;
1456         }
1457     default:
1458       return BGP_AF_MAX;
1459       break;
1460     }
1461 }
1462
1463 /* If the peer is not a peer-group but is bound to a peer-group return 1 */
1464 static inline int
1465 peer_group_active (struct peer *peer)
1466 {
1467   if (!CHECK_FLAG (peer->sflags, PEER_STATUS_GROUP) && peer->group)
1468     return 1;
1469   return 0;
1470 }
1471
1472 /* If peer is negotiated at least one address family return 1. */
1473 static inline int
1474 peer_afi_active_nego (const struct peer *peer, afi_t afi)
1475 {
1476   if (peer->afc_nego[afi][SAFI_UNICAST]
1477       || peer->afc_nego[afi][SAFI_MULTICAST]
1478       || peer->afc_nego[afi][SAFI_LABELED_UNICAST]
1479       || peer->afc_nego[afi][SAFI_MPLS_VPN]
1480       || peer->afc_nego[afi][SAFI_ENCAP]
1481       || peer->afc_nego[afi][SAFI_EVPN])
1482     return 1;
1483   return 0;
1484 }
1485
1486 /* If at least one address family activated for group, return 1. */
1487 static inline int
1488 peer_group_af_configured (struct peer_group *group)
1489 {
1490   struct peer *peer = group->conf;
1491
1492   if (peer->afc[AFI_IP][SAFI_UNICAST]
1493       || peer->afc[AFI_IP][SAFI_MULTICAST]
1494       || peer->afc[AFI_IP][SAFI_LABELED_UNICAST]
1495       || peer->afc[AFI_IP][SAFI_MPLS_VPN]
1496       || peer->afc[AFI_IP][SAFI_ENCAP]
1497       || peer->afc[AFI_IP6][SAFI_UNICAST]
1498       || peer->afc[AFI_IP6][SAFI_MULTICAST]
1499       || peer->afc[AFI_IP6][SAFI_LABELED_UNICAST]
1500       || peer->afc[AFI_IP6][SAFI_MPLS_VPN]
1501       || peer->afc[AFI_IP6][SAFI_ENCAP]
1502       || peer->afc[AFI_IP6][SAFI_EVPN])
1503     return 1;
1504   return 0;
1505 }
1506
1507 static inline char *
1508 timestamp_string (time_t ts)
1509 {
1510   time_t tbuf;
1511   tbuf = time(NULL) - (bgp_clock() - ts);
1512   return ctime(&tbuf);
1513 }
1514
1515 static inline int
1516 peer_established (struct peer *peer)
1517 {
1518   if (peer->status == Established)
1519     return 1;
1520   return 0;
1521 }
1522
1523 static inline int
1524 peer_dynamic_neighbor (struct peer *peer)
1525 {
1526   return (CHECK_FLAG(peer->flags, PEER_FLAG_DYNAMIC_NEIGHBOR)) ? 1 : 0;
1527 }
1528
1529 static inline int
1530 peer_cap_enhe (struct peer *peer, afi_t afi, safi_t safi)
1531 {
1532   return (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_NEGO));
1533 }
1534
1535 /* Lookup VRF for BGP instance based on its type. */
1536 static inline struct vrf *
1537 bgp_vrf_lookup_by_instance_type (struct bgp *bgp)
1538 {
1539   struct vrf *vrf;
1540
1541   if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
1542     vrf = vrf_lookup_by_id (VRF_DEFAULT);
1543   else if (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
1544     vrf = vrf_lookup_by_name (bgp->name);
1545   else
1546     vrf = NULL;
1547
1548   return vrf;
1549 }
1550
1551 /* Link BGP instance to VRF. */
1552 static inline void
1553 bgp_vrf_link (struct bgp *bgp, struct vrf *vrf)
1554 {
1555   bgp->vrf_id = vrf->vrf_id;
1556   if (vrf->info != (void *)bgp)
1557     {
1558       bgp_lock (bgp);
1559       vrf->info = (void *)bgp;
1560     }
1561 }
1562
1563 /* Unlink BGP instance from VRF. */
1564 static inline void
1565 bgp_vrf_unlink (struct bgp *bgp, struct vrf *vrf)
1566 {
1567   if (vrf->info == (void *)bgp)
1568     {
1569       vrf->info = NULL;
1570       bgp_unlock (bgp);
1571     }
1572   bgp->vrf_id = VRF_UNKNOWN;
1573 }
1574
1575 extern void bgp_update_redist_vrf_bitmaps (struct bgp*, vrf_id_t);
1576
1577 /* For benefit of rfapi */
1578 extern struct peer * peer_new (struct bgp *bgp);
1579
1580 #endif /* _QUAGGA_BGPD_H */