bgpd/bgpd.h

   1 /* BGP message definition header.
   2    Copyright (C) 1996, 97, 98, 99, 2000 Kunihiro Ishiguro
   3
   4 This file is part of GNU Zebra.
   5
   6 GNU Zebra is free software; you can redistribute it and/or modify it
   7 under the terms of the GNU General Public License as published by the
   8 Free Software Foundation; either version 2, or (at your option) any
   9 later version.
  10
  11 GNU Zebra is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Zebra; see the file COPYING.  If not, write to the Free
  18 Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  19 02111-1307, USA.  */
  20
  21 #ifndef _QUAGGA_BGPD_H
  22 #define _QUAGGA_BGPD_H
  23
  24 #include "lib/json.h"
  25 #include "vrf.h"
  26
  27 /* For union sockunion.  */
  28 #include "queue.h"
  29 #include "sockunion.h"
  30 #include "routemap.h"
  31 #include "linklist.h"
  32
  33 #define BGP_MAX_HOSTNAME 64     /* Linux max, is larger than most other sys */
  34
  35 /* Default interval for IPv6 RAs when triggered by BGP unnumbered neighbor. */
  36 #define BGP_UNNUM_DEFAULT_RA_INTERVAL 10
  37
  38 struct update_subgroup;
  39 struct bpacket;
  40
  41 /*
  42  * Allow the neighbor XXXX remote-as to take internal or external
  43  * AS_SPECIFIED is zero to auto-inherit original non-feature/enhancement behavior
  44  * in the system.
  45  */
  46 enum {
  47   AS_UNSPECIFIED = 0,
  48   AS_SPECIFIED,
  49   AS_INTERNAL,
  50   AS_EXTERNAL,
  51 };
  52
  53 /* Typedef BGP specific types.  */
  54 typedef u_int32_t as_t;
  55 typedef u_int16_t as16_t; /* we may still encounter 16 Bit asnums */
  56 typedef u_int16_t bgp_size_t;
  57
  58 #define max(a,b)                \
  59   ({ __typeof__ (a) _a = (a);   \
  60     __typeof__ (b) _b = (b);    \
  61     _a > _b ? _a : _b; })
  62
  63 enum bgp_af_index
  64 {
  65   BGP_AF_START,
  66   BGP_AF_IPV4_UNICAST = BGP_AF_START,
  67   BGP_AF_IPV4_MULTICAST,
  68   BGP_AF_IPV4_VPN,
  69   BGP_AF_IPV6_UNICAST,
  70   BGP_AF_IPV6_MULTICAST,
  71   BGP_AF_IPV6_VPN,
  72   BGP_AF_IPV4_ENCAP,
  73   BGP_AF_IPV6_ENCAP,
  74   BGP_AF_MAX
  75 };
  76
  77 #define AF_FOREACH(af) \
  78   for ((af) = BGP_AF_START; (af) < BGP_AF_MAX; (af)++)
  79
  80 #define FOREACH_AFI_SAFI(afi, safi)                     \
  81   for (afi = AFI_IP; afi < AFI_MAX; afi++)              \
  82     for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++)
  83
  84 /* BGP master for system wide configurations and variables.  */
  85 struct bgp_master
  86 {
  87   /* BGP instance list.  */
  88   struct list *bgp;
  89
  90   /* BGP thread master.  */
  91   struct thread_master *master;
  92
  93   /* work queues */
  94   struct work_queue *process_main_queue;
  95
  96   /* Listening sockets */
  97   struct list *listen_sockets;
  98
  99   /* BGP port number.  */
 100   u_int16_t port;
 101
 102   /* Listener address */
 103   char *address;
 104
 105   /* BGP start time.  */
 106   time_t start_time;
 107
 108   /* Various BGP global configuration.  */
 109   u_char options;
 110 #define BGP_OPT_NO_FIB                   (1 << 0)
 111 #define BGP_OPT_MULTIPLE_INSTANCE        (1 << 1)
 112 #define BGP_OPT_CONFIG_CISCO             (1 << 2)
 113 #define BGP_OPT_NO_LISTEN                (1 << 3)
 114
 115   u_int64_t updgrp_idspace;
 116   u_int64_t subgrp_idspace;
 117
 118   /* timer to dampen route map changes */
 119   struct thread *t_rmap_update;   /* Handle route map updates */
 120   u_int32_t rmap_update_timer;    /* Route map update timer */
 121 #define RMAP_DEFAULT_UPDATE_TIMER 5 /* disabled by default */
 122 };
 123
 124 /* BGP route-map structure.  */
 125 struct bgp_rmap
 126 {
 127   char *name;
 128   struct route_map *map;
 129 };
 130
 131 struct bgp_redist
 132 {
 133   u_short instance;
 134
 135   /* BGP redistribute metric configuration. */
 136   u_char redist_metric_flag;
 137   u_int32_t redist_metric;
 138
 139   /* BGP redistribute route-map.  */
 140   struct bgp_rmap rmap;
 141 };
 142
 143 /*
 144  * Type of 'struct bgp'.
 145  * - Default: The default instance
 146  * - VRF: A specific (non-default) VRF
 147  * - View: An instance used for route exchange
 148  * The "default" instance is treated separately to simplify the code. Note
 149  * that if deployed in a Multi-VRF environment, it may not exist.
 150  */
 151 enum bgp_instance_type
 152 {
 153   BGP_INSTANCE_TYPE_DEFAULT,
 154   BGP_INSTANCE_TYPE_VRF,
 155   BGP_INSTANCE_TYPE_VIEW
 156 };
 157
 158 /* BGP instance structure.  */
 159 struct bgp
 160 {
 161   /* AS number of this BGP instance.  */
 162   as_t as;
 163
 164   /* Name of this BGP instance.  */
 165   char *name;
 166
 167   /* Type of instance and VRF id. */
 168   enum bgp_instance_type inst_type;
 169   vrf_id_t vrf_id;
 170
 171   /* Reference count to allow peer_delete to finish after bgp_delete */
 172   int lock;
 173
 174   /* Self peer.  */
 175   struct peer *peer_self;
 176
 177   /* BGP peer. */
 178   struct list *peer;
 179   struct hash *peerhash;
 180
 181   /* BGP peer group.  */
 182   struct list *group;
 183
 184   /* The maximum number of BGP dynamic neighbors that can be created */
 185   int dynamic_neighbors_limit;
 186
 187     /* The current number of BGP dynamic neighbors */
 188   int dynamic_neighbors_count;
 189
 190   struct hash *update_groups[BGP_AF_MAX];
 191
 192   /*
 193    * Global statistics for update groups.
 194    */
 195   struct {
 196     u_int32_t join_events;
 197     u_int32_t prune_events;
 198     u_int32_t merge_events;
 199     u_int32_t split_events;
 200     u_int32_t updgrp_switch_events;
 201     u_int32_t peer_refreshes_combined;
 202     u_int32_t adj_count;
 203     u_int32_t merge_checks_triggered;
 204
 205     u_int32_t updgrps_created;
 206     u_int32_t updgrps_deleted;
 207     u_int32_t subgrps_created;
 208     u_int32_t subgrps_deleted;
 209   } update_group_stats;
 210
 211   /* BGP configuration.  */
 212   u_int16_t config;
 213 #define BGP_CONFIG_CLUSTER_ID             (1 << 0)
 214 #define BGP_CONFIG_CONFEDERATION          (1 << 1)
 215
 216   /* BGP router identifier.  */
 217   struct in_addr router_id;
 218   struct in_addr router_id_static;
 219   struct in_addr router_id_zebra;
 220
 221   /* BGP route reflector cluster ID.  */
 222   struct in_addr cluster_id;
 223
 224   /* BGP confederation information.  */
 225   as_t confed_id;
 226   as_t *confed_peers;
 227   int confed_peers_cnt;
 228
 229   struct thread *t_startup; /* start-up timer on only once at the beginning */
 230
 231   u_int32_t v_maxmed_onstartup; /* Duration of max-med on start-up */
 232 #define BGP_MAXMED_ONSTARTUP_UNCONFIGURED  0 /* 0 means off, its the default */
 233   u_int32_t maxmed_onstartup_value; /* Max-med value when active on start-up */
 234   struct thread *t_maxmed_onstartup; /* non-null when max-med onstartup is on */
 235   u_char    maxmed_onstartup_over; /* Flag to make it effective only once */
 236
 237   u_char    v_maxmed_admin; /* 1/0 if max-med administrative is on/off */
 238 #define BGP_MAXMED_ADMIN_UNCONFIGURED  0 /* Off by default */
 239   u_int32_t maxmed_admin_value; /* Max-med value when administrative in on */
 240 #define BGP_MAXMED_VALUE_DEFAULT  4294967294 /* Maximum by default */
 241
 242   u_char    maxmed_active; /* 1/0 if max-med is active or not */
 243   u_int32_t maxmed_value; /* Max-med value when its active */
 244
 245   /* BGP update delay on startup */
 246   struct thread *t_update_delay;
 247   struct thread *t_establish_wait;
 248   u_char update_delay_over;
 249   u_char main_zebra_update_hold;
 250   u_char main_peers_update_hold;
 251   u_int16_t v_update_delay;
 252   u_int16_t v_establish_wait;
 253   char update_delay_begin_time[64];
 254   char update_delay_end_time[64];
 255   char update_delay_zebra_resume_time[64];
 256   char update_delay_peers_resume_time[64];
 257   u_int32_t established;
 258   u_int32_t restarted_peers;
 259   u_int32_t implicit_eors;
 260   u_int32_t explicit_eors;
 261 #define BGP_UPDATE_DELAY_DEF              0
 262 #define BGP_UPDATE_DELAY_MIN              0
 263 #define BGP_UPDATE_DELAY_MAX              3600
 264
 265   /* BGP flags. */
 266   u_int32_t flags;
 267 #define BGP_FLAG_ALWAYS_COMPARE_MED       (1 << 0)
 268 #define BGP_FLAG_DETERMINISTIC_MED        (1 << 1)
 269 #define BGP_FLAG_MED_MISSING_AS_WORST     (1 << 2)
 270 #define BGP_FLAG_MED_CONFED               (1 << 3)
 271 #define BGP_FLAG_NO_DEFAULT_IPV4          (1 << 4)
 272 #define BGP_FLAG_NO_CLIENT_TO_CLIENT      (1 << 5)
 273 #define BGP_FLAG_ENFORCE_FIRST_AS         (1 << 6)
 274 #define BGP_FLAG_COMPARE_ROUTER_ID        (1 << 7)
 275 #define BGP_FLAG_ASPATH_IGNORE            (1 << 8)
 276 #define BGP_FLAG_IMPORT_CHECK             (1 << 9)
 277 #define BGP_FLAG_NO_FAST_EXT_FAILOVER     (1 << 10)
 278 #define BGP_FLAG_LOG_NEIGHBOR_CHANGES     (1 << 11)
 279 #define BGP_FLAG_GRACEFUL_RESTART         (1 << 12)
 280 #define BGP_FLAG_ASPATH_CONFED            (1 << 13)
 281 #define BGP_FLAG_ASPATH_MULTIPATH_RELAX   (1 << 14)
 282 #define BGP_FLAG_RR_ALLOW_OUTBOUND_POLICY (1 << 15)
 283 #define BGP_FLAG_DISABLE_NH_CONNECTED_CHK (1 << 16)
 284 #define BGP_FLAG_MULTIPATH_RELAX_AS_SET   (1 << 17)
 285 #define BGP_FLAG_FORCE_STATIC_PROCESS     (1 << 18)
 286 #define BGP_FLAG_SHOW_HOSTNAME            (1 << 19)
 287
 288   /* BGP Per AF flags */
 289   u_int16_t af_flags[AFI_MAX][SAFI_MAX];
 290 #define BGP_CONFIG_DAMPENING              (1 << 0)
 291
 292   /* Route table for next-hop lookup cache. */
 293   struct bgp_table *nexthop_cache_table[AFI_MAX];
 294
 295   /* Route table for import-check */
 296   struct bgp_table *import_check_table[AFI_MAX];
 297
 298   struct bgp_table *connected_table[AFI_MAX];
 299
 300   struct hash *address_hash;
 301
 302   /* Static route configuration.  */
 303   struct bgp_table *route[AFI_MAX][SAFI_MAX];
 304
 305   /* Aggregate address configuration.  */
 306   struct bgp_table *aggregate[AFI_MAX][SAFI_MAX];
 307
 308   /* BGP routing information base.  */
 309   struct bgp_table *rib[AFI_MAX][SAFI_MAX];
 310
 311   /* BGP table route-map.  */
 312   struct bgp_rmap table_map[AFI_MAX][SAFI_MAX];
 313
 314   /* BGP redistribute configuration. */
 315   struct list *redist[AFI_MAX][ZEBRA_ROUTE_MAX];
 316
 317   /* timer to re-evaluate neighbor default-originate route-maps */
 318   struct thread *t_rmap_def_originate_eval;
 319 #define RMAP_DEFAULT_ORIGINATE_EVAL_TIMER 5
 320
 321   /* BGP distance configuration.  */
 322   u_char distance_ebgp;
 323   u_char distance_ibgp;
 324   u_char distance_local;
 325
 326   /* BGP default local-preference.  */
 327   u_int32_t default_local_pref;
 328
 329   /* BGP default subgroup pkt queue max  */
 330   u_int32_t default_subgroup_pkt_queue_max;
 331
 332   /* BGP default timer.  */
 333   u_int32_t default_holdtime;
 334   u_int32_t default_keepalive;
 335
 336   /* BGP graceful restart */
 337   u_int32_t restart_time;
 338   u_int32_t stalepath_time;
 339
 340   /* Maximum-paths configuration */
 341   struct bgp_maxpaths_cfg {
 342     u_int16_t maxpaths_ebgp;
 343     u_int16_t maxpaths_ibgp;
 344     u_int16_t ibgp_flags;
 345 #define BGP_FLAG_IBGP_MULTIPATH_SAME_CLUSTERLEN (1 << 0)
 346   } maxpaths[AFI_MAX][SAFI_MAX];
 347
 348   u_int32_t wpkt_quanta;  /* per peer packet quanta to write */
 349   u_int32_t coalesce_time;
 350
 351   u_int32_t addpath_tx_id;
 352   int addpath_tx_used[AFI_MAX][SAFI_MAX];
 353 };
 354
 355 #define BGP_ROUTE_ADV_HOLD(bgp) (bgp->main_peers_update_hold)
 356
 357 #define IS_BGP_INST_KNOWN_TO_ZEBRA(bgp) \
 358         (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT || \
 359          (bgp->inst_type == BGP_INSTANCE_TYPE_VRF && bgp->vrf_id != VRF_UNKNOWN))
 360
 361 /* BGP peer-group support. */
 362 struct peer_group
 363 {
 364   /* Name of the peer-group. */
 365   char *name;
 366
 367   /* Pointer to BGP.  */
 368   struct bgp *bgp;
 369
 370   /* Peer-group client list. */
 371   struct list *peer;
 372
 373   /** Dynamic neighbor listening ranges */
 374   struct list *listen_range[AFI_MAX];
 375
 376   /* Peer-group config */
 377   struct peer *conf;
 378 };
 379
 380 /* BGP Notify message format. */
 381 struct bgp_notify
 382 {
 383   u_char code;
 384   u_char subcode;
 385   char *data;
 386   bgp_size_t length;
 387 };
 388
 389 /* Next hop self address. */
 390 struct bgp_nexthop
 391 {
 392   struct interface *ifp;
 393   struct in_addr v4;
 394 #ifdef HAVE_IPV6
 395   struct in6_addr v6_global;
 396   struct in6_addr v6_local;
 397 #endif /* HAVE_IPV6 */
 398 };
 399
 400 /* BGP addpath values */
 401 #define BGP_ADDPATH_RX     1
 402 #define BGP_ADDPATH_TX     2
 403 #define BGP_ADDPATH_ID_LEN 4
 404
 405 #define BGP_ADDPATH_TX_ID_FOR_DEFAULT_ORIGINATE 1
 406
 407 /* BGP router distinguisher value.  */
 408 #define BGP_RD_SIZE                8
 409
 410 struct bgp_rd
 411 {
 412   u_char val[BGP_RD_SIZE];
 413 };
 414
 415 #define RMAP_IN  0
 416 #define RMAP_OUT 1
 417 #define RMAP_MAX 2
 418
 419 /* BGP filter structure. */
 420 struct bgp_filter
 421 {
 422   /* Distribute-list.  */
 423   struct
 424   {
 425     char *name;
 426     struct access_list *alist;
 427   } dlist[FILTER_MAX];
 428
 429   /* Prefix-list.  */
 430   struct
 431   {
 432     char *name;
 433     struct prefix_list *plist;
 434   } plist[FILTER_MAX];
 435
 436   /* Filter-list.  */
 437   struct
 438   {
 439     char *name;
 440     struct as_list *aslist;
 441   } aslist[FILTER_MAX];
 442
 443   /* Route-map.  */
 444   struct
 445   {
 446     char *name;
 447     struct route_map *map;
 448   } map[RMAP_MAX];
 449
 450   /* Unsuppress-map.  */
 451   struct
 452   {
 453     char *name;
 454     struct route_map *map;
 455   } usmap;
 456 };
 457
 458 /* IBGP/EBGP identifier.  We also have a CONFED peer, which is to say,
 459    a peer who's AS is part of our Confederation.  */
 460 typedef enum
 461 {
 462   BGP_PEER_IBGP = 1,
 463   BGP_PEER_EBGP,
 464   BGP_PEER_INTERNAL,
 465   BGP_PEER_CONFED,
 466 } bgp_peer_sort_t;
 467
 468 /* BGP message header and packet size.  */
 469 #define BGP_MARKER_SIZE                         16
 470 #define BGP_HEADER_SIZE                         19
 471 #define BGP_MAX_PACKET_SIZE                   4096
 472 #define BGP_MAX_PACKET_SIZE_OVERFLOW          1024
 473
 474 /*
 475  * Trigger delay for bgp_announce_route().
 476  */
 477 #define BGP_ANNOUNCE_ROUTE_SHORT_DELAY_MS  100
 478 #define BGP_ANNOUNCE_ROUTE_DELAY_MS        500
 479
 480 struct peer_af
 481 {
 482   /* back pointer to the peer */
 483   struct peer *peer;
 484
 485   /* which subgroup the peer_af belongs to */
 486   struct update_subgroup *subgroup;
 487
 488   /* for being part of an update subgroup's peer list */
 489   LIST_ENTRY(peer_af) subgrp_train;
 490
 491   /* for being part of a packet's peer list */
 492   LIST_ENTRY(peer_af) pkt_train;
 493
 494   struct bpacket *next_pkt_to_send;
 495
 496   /*
 497    * Trigger timer for bgp_announce_route().
 498    */
 499   struct thread *t_announce_route;
 500
 501   afi_t afi;
 502   safi_t safi;
 503   int afid;
 504 };
 505
 506 /* BGP neighbor structure. */
 507 struct peer
 508 {
 509   /* BGP structure.  */
 510   struct bgp *bgp;
 511
 512   /* reference count, primarily to allow bgp_process'ing of route_node's
 513    * to be done after a struct peer is deleted.
 514    *
 515    * named 'lock' for hysterical reasons within Quagga.
 516    */
 517   int lock;
 518
 519   /* BGP peer group.  */
 520   struct peer_group *group;
 521   u_int64_t version[AFI_MAX][SAFI_MAX];
 522
 523   /* BGP peer_af structures, per configured AF on this peer */
 524   struct peer_af *peer_af_array[BGP_AF_MAX];
 525
 526   /* Peer's remote AS number. */
 527   int as_type;
 528   as_t as;
 529
 530   /* Peer's local AS number. */
 531   as_t local_as;
 532
 533   bgp_peer_sort_t sort;
 534
 535   /* Peer's Change local AS number. */
 536   as_t change_local_as;
 537
 538   /* Remote router ID. */
 539   struct in_addr remote_id;
 540
 541   /* Local router ID. */
 542   struct in_addr local_id;
 543
 544   /* Packet receive and send buffer. */
 545   struct stream *ibuf;
 546   struct stream_fifo *obuf;
 547   struct stream *work;
 548
 549   /* We use a separate stream to encode MP_REACH_NLRI for efficient
 550    * NLRI packing. peer->work stores all the other attributes. The
 551    * actual packet is then constructed by concatenating the two.
 552    */
 553   struct stream *scratch;
 554
 555   /* the doppelganger peer structure, due to dual TCP conn setup */
 556   struct peer *doppelganger;
 557
 558   /* Status of the peer. */
 559   int status;
 560   int ostatus;
 561
 562   /* FSM events, stored for debug purposes.
 563    * Note: uchar used for reduced memory usage.
 564    */
 565   unsigned char cur_event;
 566   unsigned char last_event;
 567   unsigned char last_major_event;
 568
 569   /* Peer index, used for dumping TABLE_DUMP_V2 format */
 570   uint16_t table_dump_index;
 571
 572   /* Peer information */
 573   int fd;                       /* File descriptor */
 574   int ttl;                      /* TTL of TCP connection to the peer. */
 575   int rtt;                      /* Estimated round-trip-time from TCP_INFO */
 576   int gtsm_hops;                /* minimum hopcount to peer */
 577   char *desc;                   /* Description of the peer. */
 578   unsigned short port;          /* Destination port for peer */
 579   char *host;                   /* Printable address of the peer. */
 580   union sockunion su;           /* Sockunion address of the peer. */
 581 #define BGP_PEER_SU_UNSPEC(peer) (peer->su.sa.sa_family == AF_UNSPEC)
 582   time_t uptime;                /* Last Up/Down time */
 583   time_t readtime;              /* Last read time */
 584   time_t resettime;             /* Last reset time */
 585
 586   ifindex_t ifindex;            /* ifindex of the BGP connection. */
 587   char *conf_if;                /* neighbor interface config name. */
 588   struct interface *ifp;        /* corresponding interface */
 589   char *ifname;                 /* bind interface name. */
 590   char *update_if;
 591   union sockunion *update_source;
 592
 593   union sockunion *su_local;    /* Sockunion of local address.  */
 594   union sockunion *su_remote;   /* Sockunion of remote address.  */
 595   int shared_network;           /* Is this peer shared same network. */
 596   struct bgp_nexthop nexthop;   /* Nexthop */
 597
 598   /* Peer address family configuration. */
 599   u_char afc[AFI_MAX][SAFI_MAX];
 600   u_char afc_nego[AFI_MAX][SAFI_MAX];
 601   u_char afc_adv[AFI_MAX][SAFI_MAX];
 602   u_char afc_recv[AFI_MAX][SAFI_MAX];
 603
 604   /* Capability flags (reset in bgp_stop) */
 605   u_int32_t cap;
 606 #define PEER_CAP_REFRESH_ADV                (1 << 0) /* refresh advertised */
 607 #define PEER_CAP_REFRESH_OLD_RCV            (1 << 1) /* refresh old received */
 608 #define PEER_CAP_REFRESH_NEW_RCV            (1 << 2) /* refresh rfc received */
 609 #define PEER_CAP_DYNAMIC_ADV                (1 << 3) /* dynamic advertised */
 610 #define PEER_CAP_DYNAMIC_RCV                (1 << 4) /* dynamic received */
 611 #define PEER_CAP_RESTART_ADV                (1 << 5) /* restart advertised */
 612 #define PEER_CAP_RESTART_RCV                (1 << 6) /* restart received */
 613 #define PEER_CAP_AS4_ADV                    (1 << 7) /* as4 advertised */
 614 #define PEER_CAP_AS4_RCV                    (1 << 8) /* as4 received */
 615 #define PEER_CAP_RESTART_BIT_ADV            (1 << 9) /* sent restart state */
 616 #define PEER_CAP_RESTART_BIT_RCV            (1 << 10) /* peer restart state */
 617 #define PEER_CAP_ADDPATH_ADV                (1 << 11) /* addpath advertised */
 618 #define PEER_CAP_ADDPATH_RCV                (1 << 12) /* addpath received */
 619 #define PEER_CAP_ENHE_ADV                   (1 << 13) /* Extended nexthop advertised */
 620 #define PEER_CAP_ENHE_RCV                   (1 << 14) /* Extended nexthop received */
 621 #define PEER_CAP_HOSTNAME_ADV               (1 << 15) /* hostname advertised */
 622 #define PEER_CAP_HOSTNAME_RCV               (1 << 16) /* hostname received */
 623
 624   /* Capability flags (reset in bgp_stop) */
 625   u_int32_t af_cap[AFI_MAX][SAFI_MAX];
 626 #define PEER_CAP_ORF_PREFIX_SM_ADV          (1 << 0) /* send-mode advertised */
 627 #define PEER_CAP_ORF_PREFIX_RM_ADV          (1 << 1) /* receive-mode advertised */
 628 #define PEER_CAP_ORF_PREFIX_SM_RCV          (1 << 2) /* send-mode received */
 629 #define PEER_CAP_ORF_PREFIX_RM_RCV          (1 << 3) /* receive-mode received */
 630 #define PEER_CAP_ORF_PREFIX_SM_OLD_RCV      (1 << 4) /* send-mode received */
 631 #define PEER_CAP_ORF_PREFIX_RM_OLD_RCV      (1 << 5) /* receive-mode received */
 632 #define PEER_CAP_RESTART_AF_RCV             (1 << 6) /* graceful restart afi/safi received */
 633 #define PEER_CAP_RESTART_AF_PRESERVE_RCV    (1 << 7) /* graceful restart afi/safi F-bit received */
 634 #define PEER_CAP_ADDPATH_AF_TX_ADV          (1 << 8) /* addpath tx advertised */
 635 #define PEER_CAP_ADDPATH_AF_TX_RCV          (1 << 9) /* addpath tx received */
 636 #define PEER_CAP_ADDPATH_AF_RX_ADV          (1 << 10) /* addpath rx advertised */
 637 #define PEER_CAP_ADDPATH_AF_RX_RCV          (1 << 11) /* addpath rx received */
 638 #define PEER_CAP_ENHE_AF_ADV                (1 << 12) /* Extended nexthopi afi/safi advertised */
 639 #define PEER_CAP_ENHE_AF_RCV                (1 << 13) /* Extended nexthop afi/safi received */
 640 #define PEER_CAP_ENHE_AF_NEGO               (1 << 14) /* Extended nexthop afi/safi negotiated */
 641
 642   /* Global configuration flags. */
 643   u_int32_t flags;
 644 #define PEER_FLAG_PASSIVE                   (1 << 0) /* passive mode */
 645 #define PEER_FLAG_SHUTDOWN                  (1 << 1) /* shutdown */
 646 #define PEER_FLAG_DONT_CAPABILITY           (1 << 2) /* dont-capability */
 647 #define PEER_FLAG_OVERRIDE_CAPABILITY       (1 << 3) /* override-capability */
 648 #define PEER_FLAG_STRICT_CAP_MATCH          (1 << 4) /* strict-match */
 649 #define PEER_FLAG_DYNAMIC_CAPABILITY        (1 << 5) /* dynamic capability */
 650 #define PEER_FLAG_DISABLE_CONNECTED_CHECK   (1 << 6) /* disable-connected-check */
 651 #define PEER_FLAG_LOCAL_AS_NO_PREPEND       (1 << 7) /* local-as no-prepend */
 652 #define PEER_FLAG_LOCAL_AS_REPLACE_AS       (1 << 8) /* local-as no-prepend replace-as */
 653 #define PEER_FLAG_DELETE                    (1 << 9) /* mark the peer for deleting */
 654 #define PEER_FLAG_CONFIG_NODE               (1 << 10) /* the node to update configs on */
 655 #define PEER_FLAG_LONESOUL                  (1 << 11)
 656 #define PEER_FLAG_DYNAMIC_NEIGHBOR          (1 << 12) /* dynamic neighbor */
 657 #define PEER_FLAG_CAPABILITY_ENHE           (1 << 13) /* Extended next-hop (rfc 5549)*/
 658 #define PEER_FLAG_IFPEER_V6ONLY             (1 << 14) /* if-based peer is v6 only */
 659
 660   /* NSF mode (graceful restart) */
 661   u_char nsf[AFI_MAX][SAFI_MAX];
 662
 663   /* Per AF configuration flags. */
 664   u_int32_t af_flags[AFI_MAX][SAFI_MAX];
 665 #define PEER_FLAG_SEND_COMMUNITY            (1 << 0) /* send-community */
 666 #define PEER_FLAG_SEND_EXT_COMMUNITY        (1 << 1) /* send-community ext. */
 667 #define PEER_FLAG_NEXTHOP_SELF              (1 << 2) /* next-hop-self */
 668 #define PEER_FLAG_REFLECTOR_CLIENT          (1 << 3) /* reflector-client */
 669 #define PEER_FLAG_RSERVER_CLIENT            (1 << 4) /* route-server-client */
 670 #define PEER_FLAG_SOFT_RECONFIG             (1 << 5) /* soft-reconfiguration */
 671 #define PEER_FLAG_AS_PATH_UNCHANGED         (1 << 6) /* transparent-as */
 672 #define PEER_FLAG_NEXTHOP_UNCHANGED         (1 << 7) /* transparent-next-hop */
 673 #define PEER_FLAG_MED_UNCHANGED             (1 << 8) /* transparent-next-hop */
 674 #define PEER_FLAG_DEFAULT_ORIGINATE         (1 << 9) /* default-originate */
 675 #define PEER_FLAG_REMOVE_PRIVATE_AS         (1 << 10) /* remove-private-as */
 676 #define PEER_FLAG_ALLOWAS_IN                (1 << 11) /* set allowas-in */
 677 #define PEER_FLAG_ORF_PREFIX_SM             (1 << 12) /* orf capability send-mode */
 678 #define PEER_FLAG_ORF_PREFIX_RM             (1 << 13) /* orf capability receive-mode */
 679 #define PEER_FLAG_MAX_PREFIX                (1 << 14) /* maximum prefix */
 680 #define PEER_FLAG_MAX_PREFIX_WARNING        (1 << 15) /* maximum prefix warning-only */
 681 #define PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED   (1 << 16) /* leave link-local nexthop unchanged */
 682 #define PEER_FLAG_FORCE_NEXTHOP_SELF        (1 << 17) /* next-hop-self force */
 683 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL     (1 << 18) /* remove-private-as all */
 684 #define PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE (1 << 19) /* remove-private-as replace-as */
 685 #define PEER_FLAG_AS_OVERRIDE               (1 << 20) /* as-override */
 686 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE (1 << 21) /* remove-private-as all replace-as */
 687 #define PEER_FLAG_ADDPATH_TX_ALL_PATHS      (1 << 22) /* addpath-tx-all-paths */
 688 #define PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS (1 << 23) /* addpath-tx-bestpath-per-AS */
 689
 690   /* MD5 password */
 691   char *password;
 692
 693   /* default-originate route-map.  */
 694   struct
 695   {
 696     char *name;
 697     struct route_map *map;
 698   } default_rmap[AFI_MAX][SAFI_MAX];
 699
 700   /* Peer status flags. */
 701   u_int16_t sflags;
 702 #define PEER_STATUS_ACCEPT_PEER       (1 << 0) /* accept peer */
 703 #define PEER_STATUS_PREFIX_OVERFLOW   (1 << 1) /* prefix-overflow */
 704 #define PEER_STATUS_CAPABILITY_OPEN   (1 << 2) /* capability open send */
 705 #define PEER_STATUS_HAVE_ACCEPT       (1 << 3) /* accept peer's parent */
 706 #define PEER_STATUS_GROUP             (1 << 4) /* peer-group conf */
 707 #define PEER_STATUS_NSF_MODE          (1 << 5) /* NSF aware peer */
 708 #define PEER_STATUS_NSF_WAIT          (1 << 6) /* wait comeback peer */
 709
 710   /* Peer status af flags (reset in bgp_stop) */
 711   u_int16_t af_sflags[AFI_MAX][SAFI_MAX];
 712 #define PEER_STATUS_ORF_PREFIX_SEND   (1 << 0) /* prefix-list send peer */
 713 #define PEER_STATUS_ORF_WAIT_REFRESH  (1 << 1) /* wait refresh received peer */
 714 #define PEER_STATUS_PREFIX_THRESHOLD  (1 << 2) /* exceed prefix-threshold */
 715 #define PEER_STATUS_PREFIX_LIMIT      (1 << 3) /* exceed prefix-limit */
 716 #define PEER_STATUS_EOR_SEND          (1 << 4) /* end-of-rib send to peer */
 717 #define PEER_STATUS_EOR_RECEIVED      (1 << 5) /* end-of-rib received from peer */
 718
 719   /* Default attribute value for the peer. */
 720   u_int32_t config;
 721 #define PEER_CONFIG_WEIGHT            (1 << 0) /* Default weight. */
 722 #define PEER_CONFIG_TIMER             (1 << 1) /* keepalive & holdtime */
 723 #define PEER_CONFIG_CONNECT           (1 << 2) /* connect */
 724 #define PEER_CONFIG_ROUTEADV          (1 << 3) /* route advertise */
 725
 726   u_int32_t weight;
 727   u_int32_t holdtime;
 728   u_int32_t keepalive;
 729   u_int32_t connect;
 730   u_int32_t routeadv;
 731
 732   /* Timer values. */
 733   u_int32_t v_start;
 734   u_int32_t v_connect;
 735   u_int32_t v_holdtime;
 736   u_int32_t v_keepalive;
 737   u_int32_t v_routeadv;
 738   u_int32_t v_pmax_restart;
 739   u_int32_t v_gr_restart;
 740
 741   /* Threads. */
 742   struct thread *t_read;
 743   struct thread *t_write;
 744   struct thread *t_start;
 745   struct thread *t_connect;
 746   struct thread *t_holdtime;
 747   struct thread *t_keepalive;
 748   struct thread *t_routeadv;
 749   struct thread *t_pmax_restart;
 750   struct thread *t_gr_restart;
 751   struct thread *t_gr_stale;
 752
 753   /* workqueues */
 754   struct work_queue *clear_node_queue;
 755
 756   /* Statistics field */
 757   u_int32_t open_in;            /* Open message input count */
 758   u_int32_t open_out;           /* Open message output count */
 759   u_int32_t update_in;          /* Update message input count */
 760   u_int32_t update_out;         /* Update message ouput count */
 761   time_t update_time;           /* Update message received time. */
 762   u_int32_t keepalive_in;       /* Keepalive input count */
 763   u_int32_t keepalive_out;      /* Keepalive output count */
 764   u_int32_t notify_in;          /* Notify input count */
 765   u_int32_t notify_out;         /* Notify output count */
 766   u_int32_t refresh_in;         /* Route Refresh input count */
 767   u_int32_t refresh_out;        /* Route Refresh output count */
 768   u_int32_t dynamic_cap_in;     /* Dynamic Capability input count.  */
 769   u_int32_t dynamic_cap_out;    /* Dynamic Capability output count.  */
 770
 771   /* BGP state count */
 772   u_int32_t established;        /* Established */
 773   u_int32_t dropped;            /* Dropped */
 774
 775   /* Update delay related fields */
 776   u_char    update_delay_over;  /* When this is set, BGP is no more waiting for EOR */
 777
 778   /* Syncronization list and time.  */
 779   struct bgp_synchronize *sync[AFI_MAX][SAFI_MAX];
 780   time_t synctime;
 781   time_t last_write;  /* timestamp when the last UPDATE msg was written */
 782
 783   /* Send prefix count. */
 784   unsigned long scount[AFI_MAX][SAFI_MAX];
 785
 786   /* Announcement attribute hash.  */
 787   struct hash *hash[AFI_MAX][SAFI_MAX];
 788
 789   /* Notify data. */
 790   struct bgp_notify notify;
 791
 792   /* Whole packet size to be read. */
 793   unsigned long packet_size;
 794
 795   /* Filter structure. */
 796   struct bgp_filter filter[AFI_MAX][SAFI_MAX];
 797
 798   /* ORF Prefix-list */
 799   struct prefix_list *orf_plist[AFI_MAX][SAFI_MAX];
 800
 801   /* Text description of last attribute rcvd */
 802   char rcvd_attr_str[BUFSIZ];
 803
 804   /* Track if we printed the attribute in debugs */
 805   int rcvd_attr_printed;
 806
 807   /* Prefix count. */
 808   unsigned long pcount[AFI_MAX][SAFI_MAX];
 809
 810   /* Max prefix count. */
 811   unsigned long pmax[AFI_MAX][SAFI_MAX];
 812   u_char pmax_threshold[AFI_MAX][SAFI_MAX];
 813   u_int16_t pmax_restart[AFI_MAX][SAFI_MAX];
 814 #define MAXIMUM_PREFIX_THRESHOLD_DEFAULT 75
 815
 816   /* allowas-in. */
 817   char allowas_in[AFI_MAX][SAFI_MAX];
 818
 819   /* peer reset cause */
 820   char last_reset;
 821 #define PEER_DOWN_RID_CHANGE             1 /* bgp router-id command */
 822 #define PEER_DOWN_REMOTE_AS_CHANGE       2 /* neighbor remote-as command */
 823 #define PEER_DOWN_LOCAL_AS_CHANGE        3 /* neighbor local-as command */
 824 #define PEER_DOWN_CLID_CHANGE            4 /* bgp cluster-id command */
 825 #define PEER_DOWN_CONFED_ID_CHANGE       5 /* bgp confederation identifier command */
 826 #define PEER_DOWN_CONFED_PEER_CHANGE     6 /* bgp confederation peer command */
 827 #define PEER_DOWN_RR_CLIENT_CHANGE       7 /* neighbor route-reflector-client command */
 828 #define PEER_DOWN_RS_CLIENT_CHANGE       8 /* neighbor route-server-client command */
 829 #define PEER_DOWN_UPDATE_SOURCE_CHANGE   9 /* neighbor update-source command */
 830 #define PEER_DOWN_AF_ACTIVATE           10 /* neighbor activate command */
 831 #define PEER_DOWN_USER_SHUTDOWN         11 /* neighbor shutdown command */
 832 #define PEER_DOWN_USER_RESET            12 /* clear ip bgp command */
 833 #define PEER_DOWN_NOTIFY_RECEIVED       13 /* notification received */
 834 #define PEER_DOWN_NOTIFY_SEND           14 /* notification send */
 835 #define PEER_DOWN_CLOSE_SESSION         15 /* tcp session close */
 836 #define PEER_DOWN_NEIGHBOR_DELETE       16 /* neghbor delete */
 837 #define PEER_DOWN_RMAP_BIND             17 /* neghbor peer-group command */
 838 #define PEER_DOWN_RMAP_UNBIND           18 /* no neighbor peer-group command */
 839 #define PEER_DOWN_CAPABILITY_CHANGE     19 /* neighbor capability command */
 840 #define PEER_DOWN_PASSIVE_CHANGE        20 /* neighbor passive command */
 841 #define PEER_DOWN_MULTIHOP_CHANGE       21 /* neighbor multihop command */
 842 #define PEER_DOWN_NSF_CLOSE_SESSION     22 /* NSF tcp session close */
 843 #define PEER_DOWN_V6ONLY_CHANGE         23 /* if-based peering v6only toggled */
 844 #define PEER_DOWN_BFD_DOWN              24 /* BFD down */
 845 #define PEER_DOWN_IF_DOWN               25 /* Interface down */
 846 #define PEER_DOWN_NBR_ADDR_DEL          26 /* Peer address lost */
 847 unsigned long last_reset_cause_size;
 848 u_char last_reset_cause[BGP_MAX_PACKET_SIZE];
 849
 850   /* The kind of route-map Flags.*/
 851   u_char rmap_type;
 852 #define PEER_RMAP_TYPE_IN             (1 << 0) /* neighbor route-map in */
 853 #define PEER_RMAP_TYPE_OUT            (1 << 1) /* neighbor route-map out */
 854 #define PEER_RMAP_TYPE_NETWORK        (1 << 2) /* network route-map */
 855 #define PEER_RMAP_TYPE_REDISTRIBUTE   (1 << 3) /* redistribute route-map */
 856 #define PEER_RMAP_TYPE_DEFAULT        (1 << 4) /* default-originate route-map */
 857 #define PEER_RMAP_TYPE_NOSET          (1 << 5) /* not allow to set commands */
 858 #define PEER_RMAP_TYPE_IMPORT         (1 << 6) /* neighbor route-map import */
 859 #define PEER_RMAP_TYPE_EXPORT         (1 << 7) /* neighbor route-map export */
 860
 861   /* peer specific BFD information */
 862   struct bfd_info *bfd_info;
 863
 864   /* hostname and domainname advertised by host */
 865   char *hostname;
 866   char *domainname;
 867 };
 868
 869 /* Check if suppress start/restart of sessions to peer. */
 870 #define BGP_PEER_START_SUPPRESSED(P) \
 871   (CHECK_FLAG ((P)->flags, PEER_FLAG_SHUTDOWN) \
 872    || CHECK_FLAG ((P)->sflags, PEER_STATUS_PREFIX_OVERFLOW))
 873
 874 #define PEER_PASSWORD_MINLEN    (1)
 875 #define PEER_PASSWORD_MAXLEN    (80)
 876
 877 /* This structure's member directly points incoming packet data
 878    stream. */
 879 struct bgp_nlri
 880 {
 881   /* AFI.  */
 882   afi_t afi;
 883
 884   /* SAFI.  */
 885   safi_t safi;
 886
 887   /* Pointer to NLRI byte stream.  */
 888   u_char *nlri;
 889
 890   /* Length of whole NLRI.  */
 891   bgp_size_t length;
 892 };
 893
 894 /* BGP versions.  */
 895 #define BGP_VERSION_4                            4
 896
 897 /* Default BGP port number.  */
 898 #define BGP_PORT_DEFAULT                       179
 899
 900 /* BGP minimum message size.  */
 901 #define BGP_MSG_OPEN_MIN_SIZE                   (BGP_HEADER_SIZE + 10)
 902 #define BGP_MSG_UPDATE_MIN_SIZE                 (BGP_HEADER_SIZE + 4)
 903 #define BGP_MSG_NOTIFY_MIN_SIZE                 (BGP_HEADER_SIZE + 2)
 904 #define BGP_MSG_KEEPALIVE_MIN_SIZE              (BGP_HEADER_SIZE + 0)
 905 #define BGP_MSG_ROUTE_REFRESH_MIN_SIZE          (BGP_HEADER_SIZE + 4)
 906 #define BGP_MSG_CAPABILITY_MIN_SIZE             (BGP_HEADER_SIZE + 3)
 907
 908 /* BGP message types.  */
 909 #define BGP_MSG_OPEN                             1
 910 #define BGP_MSG_UPDATE                           2
 911 #define BGP_MSG_NOTIFY                           3
 912 #define BGP_MSG_KEEPALIVE                        4
 913 #define BGP_MSG_ROUTE_REFRESH_NEW                5
 914 #define BGP_MSG_CAPABILITY                       6
 915 #define BGP_MSG_ROUTE_REFRESH_OLD              128
 916
 917 /* BGP open optional parameter.  */
 918 #define BGP_OPEN_OPT_AUTH                        1
 919 #define BGP_OPEN_OPT_CAP                         2
 920
 921 /* BGP4 attribute type codes.  */
 922 #define BGP_ATTR_ORIGIN                          1
 923 #define BGP_ATTR_AS_PATH                         2
 924 #define BGP_ATTR_NEXT_HOP                        3
 925 #define BGP_ATTR_MULTI_EXIT_DISC                 4
 926 #define BGP_ATTR_LOCAL_PREF                      5
 927 #define BGP_ATTR_ATOMIC_AGGREGATE                6
 928 #define BGP_ATTR_AGGREGATOR                      7
 929 #define BGP_ATTR_COMMUNITIES                     8
 930 #define BGP_ATTR_ORIGINATOR_ID                   9
 931 #define BGP_ATTR_CLUSTER_LIST                   10
 932 #define BGP_ATTR_DPA                            11
 933 #define BGP_ATTR_ADVERTISER                     12
 934 #define BGP_ATTR_RCID_PATH                      13
 935 #define BGP_ATTR_MP_REACH_NLRI                  14
 936 #define BGP_ATTR_MP_UNREACH_NLRI                15
 937 #define BGP_ATTR_EXT_COMMUNITIES                16
 938 #define BGP_ATTR_AS4_PATH                       17
 939 #define BGP_ATTR_AS4_AGGREGATOR                 18
 940 #define BGP_ATTR_AS_PATHLIMIT                   21
 941 #define BGP_ATTR_ENCAP                          23
 942
 943 /* BGP update origin.  */
 944 #define BGP_ORIGIN_IGP                           0
 945 #define BGP_ORIGIN_EGP                           1
 946 #define BGP_ORIGIN_INCOMPLETE                    2
 947
 948 /* BGP notify message codes.  */
 949 #define BGP_NOTIFY_HEADER_ERR                    1
 950 #define BGP_NOTIFY_OPEN_ERR                      2
 951 #define BGP_NOTIFY_UPDATE_ERR                    3
 952 #define BGP_NOTIFY_HOLD_ERR                      4
 953 #define BGP_NOTIFY_FSM_ERR                       5
 954 #define BGP_NOTIFY_CEASE                         6
 955 #define BGP_NOTIFY_CAPABILITY_ERR                7
 956 #define BGP_NOTIFY_MAX                           8
 957
 958 #define BGP_NOTIFY_SUBCODE_UNSPECIFIC            0
 959
 960 /* BGP_NOTIFY_HEADER_ERR sub codes.  */
 961 #define BGP_NOTIFY_HEADER_NOT_SYNC               1
 962 #define BGP_NOTIFY_HEADER_BAD_MESLEN             2
 963 #define BGP_NOTIFY_HEADER_BAD_MESTYPE            3
 964 #define BGP_NOTIFY_HEADER_MAX                    4
 965
 966 /* BGP_NOTIFY_OPEN_ERR sub codes.  */
 967 #define BGP_NOTIFY_OPEN_MALFORMED_ATTR           0
 968 #define BGP_NOTIFY_OPEN_UNSUP_VERSION            1
 969 #define BGP_NOTIFY_OPEN_BAD_PEER_AS              2
 970 #define BGP_NOTIFY_OPEN_BAD_BGP_IDENT            3
 971 #define BGP_NOTIFY_OPEN_UNSUP_PARAM              4
 972 #define BGP_NOTIFY_OPEN_AUTH_FAILURE             5
 973 #define BGP_NOTIFY_OPEN_UNACEP_HOLDTIME          6
 974 #define BGP_NOTIFY_OPEN_UNSUP_CAPBL              7
 975 #define BGP_NOTIFY_OPEN_MAX                      8
 976
 977 /* BGP_NOTIFY_UPDATE_ERR sub codes.  */
 978 #define BGP_NOTIFY_UPDATE_MAL_ATTR               1
 979 #define BGP_NOTIFY_UPDATE_UNREC_ATTR             2
 980 #define BGP_NOTIFY_UPDATE_MISS_ATTR              3
 981 #define BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR          4
 982 #define BGP_NOTIFY_UPDATE_ATTR_LENG_ERR          5
 983 #define BGP_NOTIFY_UPDATE_INVAL_ORIGIN           6
 984 #define BGP_NOTIFY_UPDATE_AS_ROUTE_LOOP          7
 985 #define BGP_NOTIFY_UPDATE_INVAL_NEXT_HOP         8
 986 #define BGP_NOTIFY_UPDATE_OPT_ATTR_ERR           9
 987 #define BGP_NOTIFY_UPDATE_INVAL_NETWORK         10
 988 #define BGP_NOTIFY_UPDATE_MAL_AS_PATH           11
 989 #define BGP_NOTIFY_UPDATE_MAX                   12
 990
 991 /* BGP_NOTIFY_CEASE sub codes (RFC 4486).  */
 992 #define BGP_NOTIFY_CEASE_MAX_PREFIX              1
 993 #define BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN          2
 994 #define BGP_NOTIFY_CEASE_PEER_UNCONFIG           3
 995 #define BGP_NOTIFY_CEASE_ADMIN_RESET             4
 996 #define BGP_NOTIFY_CEASE_CONNECT_REJECT          5
 997 #define BGP_NOTIFY_CEASE_CONFIG_CHANGE           6
 998 #define BGP_NOTIFY_CEASE_COLLISION_RESOLUTION    7
 999 #define BGP_NOTIFY_CEASE_OUT_OF_RESOURCE         8
1000 #define BGP_NOTIFY_CEASE_MAX                     9
1001
1002 /* BGP_NOTIFY_CAPABILITY_ERR sub codes (draft-ietf-idr-dynamic-cap-02). */
1003 #define BGP_NOTIFY_CAPABILITY_INVALID_ACTION     1
1004 #define BGP_NOTIFY_CAPABILITY_INVALID_LENGTH     2
1005 #define BGP_NOTIFY_CAPABILITY_MALFORMED_CODE     3
1006 #define BGP_NOTIFY_CAPABILITY_MAX                4
1007
1008 /* BGP finite state machine status.  */
1009 #define Idle                                     1
1010 #define Connect                                  2
1011 #define Active                                   3
1012 #define OpenSent                                 4
1013 #define OpenConfirm                              5
1014 #define Established                              6
1015 #define Clearing                                 7
1016 #define Deleted                                  8
1017 #define BGP_STATUS_MAX                           9
1018
1019 /* BGP finite state machine events.  */
1020 #define BGP_Start                                1
1021 #define BGP_Stop                                 2
1022 #define TCP_connection_open                      3
1023 #define TCP_connection_closed                    4
1024 #define TCP_connection_open_failed               5
1025 #define TCP_fatal_error                          6
1026 #define ConnectRetry_timer_expired               7
1027 #define Hold_Timer_expired                       8
1028 #define KeepAlive_timer_expired                  9
1029 #define Receive_OPEN_message                    10
1030 #define Receive_KEEPALIVE_message               11
1031 #define Receive_UPDATE_message                  12
1032 #define Receive_NOTIFICATION_message            13
1033 #define Clearing_Completed                      14
1034 #define BGP_EVENTS_MAX                          15
1035
1036 /* BGP timers default value.  */
1037 #define BGP_INIT_START_TIMER                     1
1038 #define BGP_DEFAULT_HOLDTIME                     9
1039 #define BGP_DEFAULT_KEEPALIVE                    3
1040 #define BGP_DEFAULT_EBGP_ROUTEADV                0
1041 #define BGP_DEFAULT_IBGP_ROUTEADV                0
1042 #define BGP_DEFAULT_CONNECT_RETRY               10
1043
1044 /* BGP default local preference.  */
1045 #define BGP_DEFAULT_LOCAL_PREF                 100
1046
1047 /* BGP default subgroup packet queue max .  */
1048 #define BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX      40
1049
1050 /* BGP graceful restart  */
1051 #define BGP_DEFAULT_RESTART_TIME               120
1052 #define BGP_DEFAULT_STALEPATH_TIME             360
1053
1054 /* RFC4364 */
1055 #define SAFI_MPLS_LABELED_VPN                  128
1056
1057 /* BGP uptime string length.  */
1058 #define BGP_UPTIME_LEN 25
1059
1060 /* Default configuration settings for bgpd.  */
1061 #define BGP_VTY_PORT                          2605
1062 #define BGP_DEFAULT_CONFIG             "bgpd.conf"
1063
1064 /* Check AS path loop when we send NLRI.  */
1065 /* #define BGP_SEND_ASPATH_CHECK */
1066
1067 /* BGP Dynamic Neighbors feature */
1068 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT    100
1069 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MIN          1
1070 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MAX       5000
1071
1072 /* Flag for peer_clear_soft().  */
1073 enum bgp_clear_type
1074 {
1075   BGP_CLEAR_SOFT_NONE,
1076   BGP_CLEAR_SOFT_OUT,
1077   BGP_CLEAR_SOFT_IN,
1078   BGP_CLEAR_SOFT_BOTH,
1079   BGP_CLEAR_SOFT_IN_ORF_PREFIX
1080 };
1081
1082 /* Macros. */
1083 #define BGP_INPUT(P)         ((P)->ibuf)
1084 #define BGP_INPUT_PNT(P)     (STREAM_PNT(BGP_INPUT(P)))
1085 #define BGP_IS_VALID_STATE_FOR_NOTIF(S)\
1086         (((S) == OpenSent) || ((S) == OpenConfirm) || ((S) == Established))
1087
1088 /* BGP error codes.  */
1089 #define BGP_SUCCESS                               0
1090 #define BGP_ERR_INVALID_VALUE                    -1
1091 #define BGP_ERR_INVALID_FLAG                     -2
1092 #define BGP_ERR_INVALID_AS                       -3
1093 #define BGP_ERR_INVALID_BGP                      -4
1094 #define BGP_ERR_PEER_GROUP_MEMBER                -5
1095 #define BGP_ERR_MULTIPLE_INSTANCE_USED           -6
1096 #define BGP_ERR_PEER_GROUP_NO_REMOTE_AS          -7
1097 #define BGP_ERR_PEER_GROUP_CANT_CHANGE           -8
1098 #define BGP_ERR_PEER_GROUP_MISMATCH              -9
1099 #define BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT  -10
1100 #define BGP_ERR_MULTIPLE_INSTANCE_NOT_SET       -11
1101 #define BGP_ERR_AS_MISMATCH                     -12
1102 #define BGP_ERR_PEER_FLAG_CONFLICT              -13
1103 #define BGP_ERR_PEER_GROUP_SHUTDOWN             -14
1104 #define BGP_ERR_PEER_FILTER_CONFLICT            -15
1105 #define BGP_ERR_NOT_INTERNAL_PEER               -16
1106 #define BGP_ERR_REMOVE_PRIVATE_AS               -17
1107 #define BGP_ERR_AF_UNCONFIGURED                 -18
1108 #define BGP_ERR_SOFT_RECONFIG_UNCONFIGURED      -19
1109 #define BGP_ERR_INSTANCE_MISMATCH               -20
1110 #define BGP_ERR_LOCAL_AS_ALLOWED_ONLY_FOR_EBGP  -21
1111 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS    -22
1112 #define BGP_ERR_TCPSIG_FAILED                   -23
1113 #define BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK   -24
1114 #define BGP_ERR_NO_IBGP_WITH_TTLHACK            -25
1115 #define BGP_ERR_NO_INTERFACE_CONFIG             -26
1116 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS_REMOTE_AS    -27
1117 #define BGP_ERR_AS_OVERRIDE                     -28
1118 #define BGP_ERR_INVALID_DYNAMIC_NEIGHBORS_LIMIT -29
1119 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_EXISTS  -30
1120 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_NOT_FOUND -31
1121 #define BGP_ERR_INVALID_FOR_DYNAMIC_PEER        -32
1122 #define BGP_ERR_MAX                             -33
1123 #define BGP_ERR_INVALID_FOR_DIRECT_PEER         -34
1124
1125 /*
1126  * Enumeration of different policy kinds a peer can be configured with.
1127  */
1128 typedef enum
1129 {
1130   BGP_POLICY_ROUTE_MAP,
1131   BGP_POLICY_FILTER_LIST,
1132   BGP_POLICY_PREFIX_LIST,
1133   BGP_POLICY_DISTRIBUTE_LIST,
1134 } bgp_policy_type_e;
1135
1136 extern struct bgp_master *bm;
1137
1138 /* Prototypes. */
1139 extern void bgp_terminate (void);
1140 extern void bgp_reset (void);
1141 extern time_t bgp_clock (void);
1142 extern void bgp_zclient_reset (void);
1143 extern int bgp_nexthop_set (union sockunion *, union sockunion *,
1144                      struct bgp_nexthop *, struct peer *);
1145 extern struct bgp *bgp_get_default (void);
1146 extern struct bgp *bgp_lookup (as_t, const char *);
1147 extern struct bgp *bgp_lookup_by_name (const char *);
1148 extern struct bgp *bgp_lookup_by_vrf_id (vrf_id_t);
1149 extern struct peer *peer_lookup (struct bgp *, union sockunion *);
1150 extern struct peer *peer_lookup_by_conf_if (struct bgp *, const char *);
1151 extern struct peer *peer_lookup_by_hostname(struct bgp *, const char *);
1152 extern void  bgp_peer_conf_if_to_su_update (struct peer *);
1153 extern int peer_group_listen_range_del(struct peer_group *, struct prefix *);
1154 extern struct peer_group *peer_group_lookup (struct bgp *, const char *);
1155 extern struct peer_group *peer_group_get (struct bgp *, const char *);
1156 extern struct peer *peer_create_bind_dynamic_neighbor (struct bgp *,
1157                     union sockunion *, struct peer_group *);
1158 extern struct prefix *peer_group_lookup_dynamic_neighbor_range (
1159                      struct peer_group *, struct prefix *);
1160 extern struct peer_group *peer_group_lookup_dynamic_neighbor (struct bgp *,
1161                      struct prefix *, struct prefix **);
1162 extern struct peer *peer_lookup_dynamic_neighbor (struct bgp *,
1163                      union sockunion *);
1164 extern void peer_drop_dynamic_neighbor (struct peer *);
1165
1166 /*
1167  * Peers are incredibly easy to memory leak
1168  * due to the various ways that they are actually used
1169  * Provide some functionality to debug locks and unlocks
1170  */
1171 extern struct peer *peer_lock_with_caller(const char *, struct peer *);
1172 extern struct peer *peer_unlock_with_caller(const char *, struct peer *);
1173 #define peer_unlock(A) peer_unlock_with_caller(__FUNCTION__, (A))
1174 #define peer_lock(B) peer_lock_with_caller(__FUNCTION__, (B))
1175
1176 extern bgp_peer_sort_t peer_sort (struct peer *peer);
1177 extern int peer_active (struct peer *);
1178 extern int peer_active_nego (struct peer *);
1179 extern void bgp_recalculate_all_bestpaths (struct bgp *bgp);
1180 extern struct peer *peer_create(union sockunion *, const char *, struct bgp *,
1181                                 as_t, as_t, int, afi_t, safi_t, struct peer_group *);
1182 extern struct peer *peer_create_accept (struct bgp *);
1183 extern void peer_xfer_config (struct peer *dst, struct peer *src);
1184 extern char *peer_uptime (time_t, char *, size_t, u_char, json_object *);
1185
1186 extern int bgp_config_write (struct vty *);
1187 extern void bgp_config_write_family_header (struct vty *, afi_t, safi_t, int *);
1188
1189 extern void bgp_master_init (void);
1190
1191 extern void bgp_init (void);
1192 extern void bgp_route_map_init (void);
1193 extern void bgp_session_reset (struct peer *);
1194
1195 extern int bgp_option_set (int);
1196 extern int bgp_option_unset (int);
1197 extern int bgp_option_check (int);
1198
1199 extern int bgp_get (struct bgp **, as_t *, const char *, enum bgp_instance_type);
1200 extern void bgp_instance_up (struct bgp *);
1201 extern void bgp_instance_down (struct bgp *);
1202 extern int bgp_delete (struct bgp *);
1203
1204 extern int bgp_flag_set (struct bgp *, int);
1205 extern int bgp_flag_unset (struct bgp *, int);
1206 extern int bgp_flag_check (struct bgp *, int);
1207
1208 extern void bgp_lock (struct bgp *);
1209 extern void bgp_unlock (struct bgp *);
1210
1211 extern void bgp_router_id_zebra_bump (vrf_id_t, const struct prefix*);
1212 extern int bgp_router_id_static_set (struct bgp *, struct in_addr);
1213
1214 extern int bgp_cluster_id_set (struct bgp *, struct in_addr *);
1215 extern int bgp_cluster_id_unset (struct bgp *);
1216
1217 extern int bgp_confederation_id_set (struct bgp *, as_t);
1218 extern int bgp_confederation_id_unset (struct bgp *);
1219 extern int bgp_confederation_peers_check (struct bgp *, as_t);
1220
1221 extern int bgp_confederation_peers_add (struct bgp *, as_t);
1222 extern int bgp_confederation_peers_remove (struct bgp *, as_t);
1223
1224 extern int bgp_timers_set (struct bgp *, u_int32_t keepalive, u_int32_t holdtime);
1225 extern int bgp_timers_unset (struct bgp *);
1226
1227 extern int bgp_default_local_preference_set (struct bgp *, u_int32_t);
1228 extern int bgp_default_local_preference_unset (struct bgp *);
1229
1230 extern int bgp_default_subgroup_pkt_queue_max_set (struct bgp *bgp, u_int32_t);
1231 extern int bgp_default_subgroup_pkt_queue_max_unset (struct bgp *bgp);
1232
1233 extern int bgp_listen_limit_set (struct bgp *, int);
1234 extern int bgp_listen_limit_unset (struct bgp *);
1235
1236 extern int bgp_update_delay_active (struct bgp *);
1237 extern int bgp_update_delay_configured (struct bgp *);
1238 extern void peer_as_change (struct peer *, as_t, int);
1239 extern int peer_remote_as (struct bgp *, union sockunion *,const char *, as_t *,
1240                            int, afi_t, safi_t);
1241 extern int peer_group_remote_as (struct bgp *, const char *, as_t *, int);
1242 extern int peer_delete (struct peer *peer);
1243 extern int peer_group_delete (struct peer_group *);
1244 extern int peer_group_remote_as_delete (struct peer_group *);
1245 extern int peer_group_listen_range_add(struct peer_group *, struct prefix *);
1246
1247 extern int peer_activate (struct peer *, afi_t, safi_t);
1248 extern int peer_deactivate (struct peer *, afi_t, safi_t);
1249 extern int peer_afc_set (struct peer *, afi_t, safi_t, int);
1250
1251 extern int peer_group_bind (struct bgp *, union sockunion *, struct peer *,
1252                             struct peer_group *, as_t *);
1253 extern int peer_group_unbind (struct bgp *, struct peer *, struct peer_group *);
1254
1255 extern int peer_flag_set (struct peer *, u_int32_t);
1256 extern int peer_flag_unset (struct peer *, u_int32_t);
1257
1258 extern int peer_af_flag_set (struct peer *, afi_t, safi_t, u_int32_t);
1259 extern int peer_af_flag_unset (struct peer *, afi_t, safi_t, u_int32_t);
1260 extern int peer_af_flag_check (struct peer *, afi_t, safi_t, u_int32_t);
1261
1262 extern int peer_ebgp_multihop_set (struct peer *, int);
1263 extern int peer_ebgp_multihop_unset (struct peer *);
1264 extern int is_ebgp_multihop_configured (struct peer *peer);
1265
1266 extern int peer_description_set (struct peer *, const char *);
1267 extern int peer_description_unset (struct peer *);
1268
1269 extern int peer_update_source_if_set (struct peer *, const char *);
1270 extern int peer_update_source_addr_set (struct peer *, const union sockunion *);
1271 extern int peer_update_source_unset (struct peer *);
1272
1273 extern int peer_default_originate_set (struct peer *, afi_t, safi_t, const char *);
1274 extern int peer_default_originate_unset (struct peer *, afi_t, safi_t);
1275
1276 extern int peer_port_set (struct peer *, u_int16_t);
1277 extern int peer_port_unset (struct peer *);
1278
1279 extern int peer_weight_set (struct peer *, u_int16_t);
1280 extern int peer_weight_unset (struct peer *);
1281
1282 extern int peer_timers_set (struct peer *, u_int32_t keepalive, u_int32_t holdtime);
1283 extern int peer_timers_unset (struct peer *);
1284
1285 extern int peer_timers_connect_set (struct peer *, u_int32_t);
1286 extern int peer_timers_connect_unset (struct peer *);
1287
1288 extern int peer_advertise_interval_set (struct peer *, u_int32_t);
1289 extern int peer_advertise_interval_unset (struct peer *);
1290
1291 extern void peer_interface_set (struct peer *, const char *);
1292 extern void peer_interface_unset (struct peer *);
1293
1294 extern int peer_distribute_set (struct peer *, afi_t, safi_t, int, const char *);
1295 extern int peer_distribute_unset (struct peer *, afi_t, safi_t, int);
1296
1297 extern int peer_allowas_in_set (struct peer *, afi_t, safi_t, int);
1298 extern int peer_allowas_in_unset (struct peer *, afi_t, safi_t);
1299
1300 extern int peer_local_as_set (struct peer *, as_t, int, int);
1301 extern int peer_local_as_unset (struct peer *);
1302
1303 extern int peer_prefix_list_set (struct peer *, afi_t, safi_t, int, const char *);
1304 extern int peer_prefix_list_unset (struct peer *, afi_t, safi_t, int);
1305
1306 extern int peer_aslist_set (struct peer *, afi_t, safi_t, int, const char *);
1307 extern int peer_aslist_unset (struct peer *,afi_t, safi_t, int);
1308
1309 extern int peer_route_map_set (struct peer *, afi_t, safi_t, int, const char *);
1310 extern int peer_route_map_unset (struct peer *, afi_t, safi_t, int);
1311
1312 extern int peer_unsuppress_map_set (struct peer *, afi_t, safi_t, const char *);
1313
1314 extern int peer_password_set (struct peer *, const char *);
1315 extern int peer_password_unset (struct peer *);
1316
1317 extern int peer_unsuppress_map_unset (struct peer *, afi_t, safi_t);
1318
1319 extern int peer_maximum_prefix_set (struct peer *, afi_t, safi_t, u_int32_t, u_char, int, u_int16_t);
1320 extern int peer_maximum_prefix_unset (struct peer *, afi_t, safi_t);
1321
1322 extern int peer_clear (struct peer *, struct listnode **);
1323 extern int peer_clear_soft (struct peer *, afi_t, safi_t, enum bgp_clear_type);
1324
1325 extern int peer_ttl_security_hops_set (struct peer *, int);
1326 extern int peer_ttl_security_hops_unset (struct peer *);
1327
1328 extern int bgp_route_map_update_timer (struct thread *thread);
1329 extern void bgp_route_map_terminate(void);
1330
1331 extern int peer_cmp (struct peer *p1, struct peer *p2);
1332
1333 extern struct peer_af * peer_af_create (struct peer *, afi_t, safi_t);
1334 extern struct peer_af * peer_af_find (struct peer *, afi_t, safi_t);
1335 extern int peer_af_delete (struct peer *, afi_t, safi_t);
1336
1337 extern void bgp_close(void);
1338
1339 static inline int
1340 afindex (afi_t afi, safi_t safi)
1341 {
1342   switch (afi)
1343     {
1344     case AFI_IP:
1345       switch (safi)
1346         {
1347         case SAFI_UNICAST:
1348           return BGP_AF_IPV4_UNICAST;
1349           break;
1350         case SAFI_MULTICAST:
1351           return BGP_AF_IPV4_MULTICAST;
1352           break;
1353         case SAFI_MPLS_VPN:
1354           return BGP_AF_IPV4_VPN;
1355           break;
1356         case SAFI_ENCAP:
1357           return BGP_AF_IPV4_ENCAP;
1358           break;
1359         default:
1360           return BGP_AF_MAX;
1361           break;
1362         }
1363       break;
1364     case AFI_IP6:
1365       switch (safi)
1366         {
1367         case SAFI_UNICAST:
1368           return BGP_AF_IPV6_UNICAST;
1369           break;
1370         case SAFI_MULTICAST:
1371           return BGP_AF_IPV6_MULTICAST;
1372           break;
1373         case SAFI_MPLS_VPN:
1374           return BGP_AF_IPV6_VPN;
1375           break;
1376         case SAFI_ENCAP:
1377           return BGP_AF_IPV6_ENCAP;
1378           break;
1379         default:
1380           return BGP_AF_MAX;
1381           break;
1382         }
1383       break;
1384     default:
1385       return BGP_AF_MAX;
1386       break;
1387     }
1388 }
1389
1390 /* If the peer is not a peer-group but is bound to a peer-group return 1 */
1391 static inline int
1392 peer_group_active (struct peer *peer)
1393 {
1394   if (!CHECK_FLAG (peer->sflags, PEER_STATUS_GROUP) && peer->group)
1395     return 1;
1396   return 0;
1397 }
1398
1399 /* If peer is negotiated at least one address family return 1. */
1400 static inline int
1401 peer_afi_active_nego (const struct peer *peer, afi_t afi)
1402 {
1403   if (peer->afc_nego[afi][SAFI_UNICAST]
1404       || peer->afc_nego[afi][SAFI_MULTICAST]
1405       || peer->afc_nego[afi][SAFI_MPLS_VPN]
1406       || peer->afc_nego[afi][SAFI_ENCAP])
1407     return 1;
1408   return 0;
1409 }
1410
1411 /* If at least one address family activated for group, return 1. */
1412 static inline int
1413 peer_group_af_configured (struct peer_group *group)
1414 {
1415   struct peer *peer = group->conf;
1416
1417   if (peer->afc[AFI_IP][SAFI_UNICAST]
1418       || peer->afc[AFI_IP][SAFI_MULTICAST]
1419       || peer->afc[AFI_IP][SAFI_MPLS_VPN]
1420       || peer->afc[AFI_IP][SAFI_ENCAP]
1421       || peer->afc[AFI_IP6][SAFI_UNICAST]
1422       || peer->afc[AFI_IP6][SAFI_MULTICAST]
1423       || peer->afc[AFI_IP6][SAFI_MPLS_VPN]
1424       || peer->afc[AFI_IP6][SAFI_ENCAP])
1425     return 1;
1426   return 0;
1427 }
1428
1429 static inline char *
1430 timestamp_string (time_t ts)
1431 {
1432 #ifdef HAVE_CLOCK_MONOTONIC
1433   time_t tbuf;
1434   tbuf = time(NULL) - (bgp_clock() - ts);
1435   return ctime(&tbuf);
1436 #else
1437   return ctime(&ts);
1438 #endif /* HAVE_CLOCK_MONOTONIC */
1439 }
1440
1441 static inline int
1442 peer_established (struct peer *peer)
1443 {
1444   if (peer->status == Established)
1445     return 1;
1446   return 0;
1447 }
1448
1449 static inline int
1450 peer_dynamic_neighbor (struct peer *peer)
1451 {
1452   return (CHECK_FLAG(peer->flags, PEER_FLAG_DYNAMIC_NEIGHBOR)) ? 1 : 0;
1453 }
1454
1455 /*
1456  * Currently supporting RFC 5549 for AFI_IP/SAFI_UNICAST only.
1457  *
1458  * Note: When other RFC-5549 applicable SAFIs to be supported, that should
1459  * come as an argument to this routine.
1460  */
1461 static inline int
1462 peer_cap_enhe (struct peer *peer)
1463 {
1464   return (CHECK_FLAG(peer->af_cap[AFI_IP][SAFI_UNICAST], PEER_CAP_ENHE_AF_NEGO));
1465 }
1466
1467 /* Lookup VRF for BGP instance based on its type. */
1468 static inline struct vrf *
1469 bgp_vrf_lookup_by_instance_type (struct bgp *bgp)
1470 {
1471   struct vrf *vrf;
1472
1473   if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
1474     vrf = vrf_lookup (VRF_DEFAULT);
1475   else if (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
1476     vrf = vrf_lookup_by_name (bgp->name);
1477   else
1478     vrf = NULL;
1479
1480   return vrf;
1481 }
1482
1483 /* Link BGP instance to VRF. */
1484 static inline void
1485 bgp_vrf_link (struct bgp *bgp, struct vrf *vrf)
1486 {
1487   bgp->vrf_id = vrf->vrf_id;
1488   if (vrf->info != (void *)bgp)
1489     {
1490       bgp_lock (bgp);
1491       vrf->info = (void *)bgp;
1492     }
1493 }
1494
1495 /* Unlink BGP instance from VRF. */
1496 static inline void
1497 bgp_vrf_unlink (struct bgp *bgp, struct vrf *vrf)
1498 {
1499   if (vrf->info == (void *)bgp)
1500     {
1501       vrf->info = NULL;
1502       bgp_unlock (bgp);
1503     }
1504   bgp->vrf_id = VRF_UNKNOWN;
1505 }
1506
1507 extern void bgp_update_redist_vrf_bitmaps (struct bgp*, vrf_id_t);
1508 #endif /* _QUAGGA_BGPD_H */