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