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