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