bgpd/bgpd.h

   1 /* BGP message definition header.
   2  * Copyright (C) 1996, 97, 98, 99, 2000 Kunihiro Ishiguro
   3  *
   4  * This file is part of GNU Zebra.
   5  *
   6  * GNU Zebra is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2, or (at your option) any
   9  * later version.
  10  *
  11  * GNU Zebra is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; see the file COPYING; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #ifndef _QUAGGA_BGPD_H
  22 #define _QUAGGA_BGPD_H
  23
  24 #include "qobj.h"
  25 #include <pthread.h>
  26
  27 #include "lib/json.h"
  28 #include "vrf.h"
  29 #include "vty.h"
  30
  31 /* For union sockunion.  */
  32 #include "queue.h"
  33 #include "sockunion.h"
  34 #include "routemap.h"
  35 #include "linklist.h"
  36 #include "defaults.h"
  37 #include "bgp_memory.h"
  38 #include "bitfield.h"
  39 #include "vxlan.h"
  40 #include "bgp_labelpool.h"
  41
  42 #define BGP_MAX_HOSTNAME 64     /* Linux max, is larger than most other sys */
  43 #define BGP_PEER_MAX_HASH_SIZE 16384
  44
  45 /* Default interval for IPv6 RAs when triggered by BGP unnumbered neighbor. */
  46 #define BGP_UNNUM_DEFAULT_RA_INTERVAL 10
  47
  48 struct update_subgroup;
  49 struct bpacket;
  50
  51 /*
  52  * Allow the neighbor XXXX remote-as to take internal or external
  53  * AS_SPECIFIED is zero to auto-inherit original non-feature/enhancement
  54  * behavior
  55  * in the system.
  56  */
  57 enum { AS_UNSPECIFIED = 0,
  58        AS_SPECIFIED,
  59        AS_INTERNAL,
  60        AS_EXTERNAL,
  61 };
  62
  63 /* Typedef BGP specific types.  */
  64 typedef uint32_t as_t;
  65 typedef uint16_t as16_t; /* we may still encounter 16 Bit asnums */
  66 typedef uint16_t bgp_size_t;
  67
  68 #define max(a, b)                                                              \
  69         ({                                                                     \
  70                 __typeof__(a) _a = (a);                                        \
  71                 __typeof__(b) _b = (b);                                        \
  72                 _a > _b ? _a : _b;                                             \
  73         })
  74
  75 enum bgp_af_index {
  76         BGP_AF_START,
  77         BGP_AF_IPV4_UNICAST = BGP_AF_START,
  78         BGP_AF_IPV4_MULTICAST,
  79         BGP_AF_IPV4_VPN,
  80         BGP_AF_IPV6_UNICAST,
  81         BGP_AF_IPV6_MULTICAST,
  82         BGP_AF_IPV6_VPN,
  83         BGP_AF_IPV4_ENCAP,
  84         BGP_AF_IPV6_ENCAP,
  85         BGP_AF_L2VPN_EVPN,
  86         BGP_AF_IPV4_LBL_UNICAST,
  87         BGP_AF_IPV6_LBL_UNICAST,
  88         BGP_AF_IPV4_FLOWSPEC,
  89         BGP_AF_IPV6_FLOWSPEC,
  90         BGP_AF_MAX
  91 };
  92
  93 #define AF_FOREACH(af) for ((af) = BGP_AF_START; (af) < BGP_AF_MAX; (af)++)
  94
  95 #define FOREACH_AFI_SAFI(afi, safi)                                            \
  96         for (afi = AFI_IP; afi < AFI_MAX; afi++)                               \
  97                 for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++)
  98
  99 /* BGP master for system wide configurations and variables.  */
 100 struct bgp_master {
 101         /* BGP instance list.  */
 102         struct list *bgp;
 103
 104         /* BGP thread master.  */
 105         struct thread_master *master;
 106
 107 /* BGP pthreads. */
 108 #define PTHREAD_IO              (1 << 1)
 109 #define PTHREAD_KEEPALIVES      (1 << 2)
 110
 111         /* work queues */
 112         struct work_queue *process_main_queue;
 113
 114         /* Listening sockets */
 115         struct list *listen_sockets;
 116
 117         /* BGP port number.  */
 118         uint16_t port;
 119
 120         /* Listener address */
 121         char *address;
 122
 123         /* BGP start time.  */
 124         time_t start_time;
 125
 126         /* Various BGP global configuration.  */
 127         uint8_t options;
 128 #define BGP_OPT_NO_FIB                   (1 << 0)
 129 #define BGP_OPT_MULTIPLE_INSTANCE        (1 << 1)
 130 #define BGP_OPT_CONFIG_CISCO             (1 << 2)
 131 #define BGP_OPT_NO_LISTEN                (1 << 3)
 132
 133         uint64_t updgrp_idspace;
 134         uint64_t subgrp_idspace;
 135
 136         /* timer to dampen route map changes */
 137         struct thread *t_rmap_update; /* Handle route map updates */
 138         uint32_t rmap_update_timer;   /* Route map update timer */
 139 #define RMAP_DEFAULT_UPDATE_TIMER 5 /* disabled by default */
 140
 141         /* Id space for automatic RD derivation for an EVI/VRF */
 142         bitfield_t rd_idspace;
 143
 144         /* dynamic mpls label allocation pool */
 145         struct labelpool labelpool;
 146
 147         QOBJ_FIELDS
 148 };
 149 DECLARE_QOBJ_TYPE(bgp_master)
 150
 151 /* BGP route-map structure.  */
 152 struct bgp_rmap {
 153         char *name;
 154         struct route_map *map;
 155 };
 156
 157 struct bgp_redist {
 158         unsigned short instance;
 159
 160         /* BGP redistribute metric configuration. */
 161         uint8_t redist_metric_flag;
 162         uint32_t redist_metric;
 163
 164         /* BGP redistribute route-map.  */
 165         struct bgp_rmap rmap;
 166 };
 167
 168 typedef enum {
 169         BGP_VPN_POLICY_DIR_FROMVPN = 0,
 170         BGP_VPN_POLICY_DIR_TOVPN = 1,
 171         BGP_VPN_POLICY_DIR_MAX = 2
 172 } vpn_policy_direction_t;
 173
 174 struct vpn_policy {
 175         struct bgp *bgp; /* parent */
 176         afi_t afi;
 177         struct ecommunity *rtlist[BGP_VPN_POLICY_DIR_MAX];
 178         struct ecommunity *import_redirect_rtlist;
 179         char *rmap_name[BGP_VPN_POLICY_DIR_MAX];
 180         struct route_map *rmap[BGP_VPN_POLICY_DIR_MAX];
 181
 182         /* should be mpls_label_t? */
 183         uint32_t tovpn_label; /* may be MPLS_LABEL_NONE */
 184         uint32_t tovpn_zebra_vrf_label_last_sent;
 185         struct prefix_rd tovpn_rd;
 186         struct prefix tovpn_nexthop; /* unset => set to 0 */
 187         uint32_t flags;
 188 #define BGP_VPN_POLICY_TOVPN_LABEL_AUTO        (1 << 0)
 189 #define BGP_VPN_POLICY_TOVPN_RD_SET            (1 << 1)
 190 #define BGP_VPN_POLICY_TOVPN_NEXTHOP_SET       (1 << 2)
 191 };
 192
 193 /*
 194  * Type of 'struct bgp'.
 195  * - Default: The default instance
 196  * - VRF: A specific (non-default) VRF
 197  * - View: An instance used for route exchange
 198  * The "default" instance is treated separately to simplify the code. Note
 199  * that if deployed in a Multi-VRF environment, it may not exist.
 200  */
 201 enum bgp_instance_type {
 202         BGP_INSTANCE_TYPE_DEFAULT,
 203         BGP_INSTANCE_TYPE_VRF,
 204         BGP_INSTANCE_TYPE_VIEW
 205 };
 206
 207 /* BGP instance structure.  */
 208 struct bgp {
 209         /* AS number of this BGP instance.  */
 210         as_t as;
 211
 212         /* Name of this BGP instance.  */
 213         char *name;
 214         char *name_pretty;      /* printable "VRF|VIEW name|default" */
 215
 216         /* Type of instance and VRF id. */
 217         enum bgp_instance_type inst_type;
 218         vrf_id_t vrf_id;
 219
 220         /* Reference count to allow peer_delete to finish after bgp_delete */
 221         int lock;
 222
 223         /* Self peer.  */
 224         struct peer *peer_self;
 225
 226         /* BGP peer. */
 227         struct list *peer;
 228         struct hash *peerhash;
 229
 230         /* BGP peer group.  */
 231         struct list *group;
 232
 233         /* The maximum number of BGP dynamic neighbors that can be created */
 234         int dynamic_neighbors_limit;
 235
 236         /* The current number of BGP dynamic neighbors */
 237         int dynamic_neighbors_count;
 238
 239         struct hash *update_groups[BGP_AF_MAX];
 240
 241         /*
 242          * Global statistics for update groups.
 243          */
 244         struct {
 245                 uint32_t join_events;
 246                 uint32_t prune_events;
 247                 uint32_t merge_events;
 248                 uint32_t split_events;
 249                 uint32_t updgrp_switch_events;
 250                 uint32_t peer_refreshes_combined;
 251                 uint32_t adj_count;
 252                 uint32_t merge_checks_triggered;
 253
 254                 uint32_t updgrps_created;
 255                 uint32_t updgrps_deleted;
 256                 uint32_t subgrps_created;
 257                 uint32_t subgrps_deleted;
 258         } update_group_stats;
 259
 260         /* BGP configuration.  */
 261         uint16_t config;
 262 #define BGP_CONFIG_CLUSTER_ID             (1 << 0)
 263 #define BGP_CONFIG_CONFEDERATION          (1 << 1)
 264
 265         /* BGP router identifier.  */
 266         struct in_addr router_id;
 267         struct in_addr router_id_static;
 268         struct in_addr router_id_zebra;
 269
 270         /* BGP route reflector cluster ID.  */
 271         struct in_addr cluster_id;
 272
 273         /* BGP confederation information.  */
 274         as_t confed_id;
 275         as_t *confed_peers;
 276         int confed_peers_cnt;
 277
 278         struct thread
 279                 *t_startup; /* start-up timer on only once at the beginning */
 280
 281         uint32_t v_maxmed_onstartup; /* Duration of max-med on start-up */
 282 #define BGP_MAXMED_ONSTARTUP_UNCONFIGURED  0 /* 0 means off, its the default */
 283         uint32_t maxmed_onstartup_value;     /* Max-med value when active on
 284                                                  start-up */
 285         struct thread
 286                 *t_maxmed_onstartup; /* non-null when max-med onstartup is on */
 287         uint8_t maxmed_onstartup_over; /* Flag to make it effective only once */
 288
 289         uint8_t v_maxmed_admin; /* 1/0 if max-med administrative is on/off */
 290 #define BGP_MAXMED_ADMIN_UNCONFIGURED  0 /* Off by default */
 291         uint32_t maxmed_admin_value; /* Max-med value when administrative in on
 292                                       */
 293 #define BGP_MAXMED_VALUE_DEFAULT  4294967294 /* Maximum by default */
 294
 295         uint8_t maxmed_active; /* 1/0 if max-med is active or not */
 296         uint32_t maxmed_value; /* Max-med value when its active */
 297
 298         /* BGP update delay on startup */
 299         struct thread *t_update_delay;
 300         struct thread *t_establish_wait;
 301         uint8_t update_delay_over;
 302         uint8_t main_zebra_update_hold;
 303         uint8_t main_peers_update_hold;
 304         uint16_t v_update_delay;
 305         uint16_t v_establish_wait;
 306         char update_delay_begin_time[64];
 307         char update_delay_end_time[64];
 308         char update_delay_zebra_resume_time[64];
 309         char update_delay_peers_resume_time[64];
 310         uint32_t established;
 311         uint32_t restarted_peers;
 312         uint32_t implicit_eors;
 313         uint32_t explicit_eors;
 314 #define BGP_UPDATE_DELAY_DEF              0
 315 #define BGP_UPDATE_DELAY_MIN              0
 316 #define BGP_UPDATE_DELAY_MAX              3600
 317
 318         /* BGP flags. */
 319         uint32_t flags;
 320 #define BGP_FLAG_ALWAYS_COMPARE_MED       (1 << 0)
 321 #define BGP_FLAG_DETERMINISTIC_MED        (1 << 1)
 322 #define BGP_FLAG_MED_MISSING_AS_WORST     (1 << 2)
 323 #define BGP_FLAG_MED_CONFED               (1 << 3)
 324 #define BGP_FLAG_NO_DEFAULT_IPV4          (1 << 4)
 325 #define BGP_FLAG_NO_CLIENT_TO_CLIENT      (1 << 5)
 326 #define BGP_FLAG_ENFORCE_FIRST_AS         (1 << 6)
 327 #define BGP_FLAG_COMPARE_ROUTER_ID        (1 << 7)
 328 #define BGP_FLAG_ASPATH_IGNORE            (1 << 8)
 329 #define BGP_FLAG_IMPORT_CHECK             (1 << 9)
 330 #define BGP_FLAG_NO_FAST_EXT_FAILOVER     (1 << 10)
 331 #define BGP_FLAG_LOG_NEIGHBOR_CHANGES     (1 << 11)
 332 #define BGP_FLAG_GRACEFUL_RESTART         (1 << 12)
 333 #define BGP_FLAG_ASPATH_CONFED            (1 << 13)
 334 #define BGP_FLAG_ASPATH_MULTIPATH_RELAX   (1 << 14)
 335 #define BGP_FLAG_RR_ALLOW_OUTBOUND_POLICY (1 << 15)
 336 #define BGP_FLAG_DISABLE_NH_CONNECTED_CHK (1 << 16)
 337 #define BGP_FLAG_MULTIPATH_RELAX_AS_SET   (1 << 17)
 338 #define BGP_FLAG_FORCE_STATIC_PROCESS     (1 << 18)
 339 #define BGP_FLAG_SHOW_HOSTNAME            (1 << 19)
 340 #define BGP_FLAG_GR_PRESERVE_FWD          (1 << 20)
 341 #define BGP_FLAG_GRACEFUL_SHUTDOWN        (1 << 21)
 342
 343         /* BGP Per AF flags */
 344         uint16_t af_flags[AFI_MAX][SAFI_MAX];
 345 #define BGP_CONFIG_DAMPENING              (1 << 0)
 346 #define BGP_CONFIG_VRF_TO_MPLSVPN_EXPORT  (1 << 1)
 347 #define BGP_CONFIG_MPLSVPN_TO_VRF_IMPORT  (1 << 2)
 348
 349 /* l2vpn evpn flags - 1 << 0 is used for DAMPENNG */
 350 #define BGP_L2VPN_EVPN_ADVERTISE_IPV4_UNICAST      (1 << 1)
 351 #define BGP_L2VPN_EVPN_ADVERTISE_IPV6_UNICAST      (1 << 2)
 352 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV4      (1 << 3)
 353 #define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV6      (1 << 4)
 354
 355
 356         /* Route table for next-hop lookup cache. */
 357         struct bgp_table *nexthop_cache_table[AFI_MAX];
 358
 359         /* Route table for import-check */
 360         struct bgp_table *import_check_table[AFI_MAX];
 361
 362         struct bgp_table *connected_table[AFI_MAX];
 363
 364         struct hash *address_hash;
 365
 366         /* DB for all local tunnel-ips - used mainly for martian checks
 367            Currently it only has all VxLan tunnel IPs*/
 368         struct hash *tip_hash;
 369
 370         /* Static route configuration.  */
 371         struct bgp_table *route[AFI_MAX][SAFI_MAX];
 372
 373         /* Aggregate address configuration.  */
 374         struct bgp_table *aggregate[AFI_MAX][SAFI_MAX];
 375
 376         /* BGP routing information base.  */
 377         struct bgp_table *rib[AFI_MAX][SAFI_MAX];
 378
 379         /* BGP table route-map.  */
 380         struct bgp_rmap table_map[AFI_MAX][SAFI_MAX];
 381
 382         /* BGP redistribute configuration. */
 383         struct list *redist[AFI_MAX][ZEBRA_ROUTE_MAX];
 384
 385         /* Allocate MPLS labels */
 386         uint8_t allocate_mpls_labels[AFI_MAX][SAFI_MAX];
 387
 388         /* timer to re-evaluate neighbor default-originate route-maps */
 389         struct thread *t_rmap_def_originate_eval;
 390 #define RMAP_DEFAULT_ORIGINATE_EVAL_TIMER 5
 391
 392         /* BGP distance configuration.  */
 393         uint8_t distance_ebgp[AFI_MAX][SAFI_MAX];
 394         uint8_t distance_ibgp[AFI_MAX][SAFI_MAX];
 395         uint8_t distance_local[AFI_MAX][SAFI_MAX];
 396
 397         /* BGP default local-preference.  */
 398         uint32_t default_local_pref;
 399
 400         /* BGP default subgroup pkt queue max  */
 401         uint32_t default_subgroup_pkt_queue_max;
 402
 403         /* BGP default timer.  */
 404         uint32_t default_holdtime;
 405         uint32_t default_keepalive;
 406
 407         /* BGP graceful restart */
 408         uint32_t restart_time;
 409         uint32_t stalepath_time;
 410
 411         /* Maximum-paths configuration */
 412         struct bgp_maxpaths_cfg {
 413                 uint16_t maxpaths_ebgp;
 414                 uint16_t maxpaths_ibgp;
 415                 uint16_t ibgp_flags;
 416 #define BGP_FLAG_IBGP_MULTIPATH_SAME_CLUSTERLEN (1 << 0)
 417         } maxpaths[AFI_MAX][SAFI_MAX];
 418
 419         _Atomic uint32_t wpkt_quanta; // max # packets to write per i/o cycle
 420         _Atomic uint32_t rpkt_quanta; // max # packets to read per i/o cycle
 421
 422         /* Automatic coalesce adjust on/off */
 423         bool heuristic_coalesce;
 424         /* Actual coalesce time */
 425         uint32_t coalesce_time;
 426
 427         /* Auto-shutdown new peers */
 428         bool autoshutdown;
 429
 430         uint32_t addpath_tx_id;
 431         int addpath_tx_used[AFI_MAX][SAFI_MAX];
 432
 433 #if ENABLE_BGP_VNC
 434         struct rfapi_cfg *rfapi_cfg;
 435         struct rfapi *rfapi;
 436 #endif
 437
 438         /* EVPN related information */
 439
 440         /* EVI hash table */
 441         struct hash *vnihash;
 442
 443         /* EVPN enable - advertise gateway macip routes */
 444         int advertise_gw_macip;
 445
 446         /* EVPN enable - advertise local VNIs and their MACs etc. */
 447         int advertise_all_vni;
 448
 449         /* Hash table of Import RTs to EVIs */
 450         struct hash *import_rt_hash;
 451
 452         /* Hash table of VRF import RTs to VRFs */
 453         struct hash *vrf_import_rt_hash;
 454
 455         /* L3-VNI corresponding to this vrf */
 456         vni_t l3vni;
 457
 458         /* router-mac to be used in mac-ip routes for this vrf */
 459         struct ethaddr rmac;
 460
 461         /* originator ip - to be used as NH for type-5 routes */
 462         struct in_addr originator_ip;
 463
 464         /* vrf flags */
 465         uint32_t vrf_flags;
 466 #define BGP_VRF_AUTO                        (1 << 0)
 467 #define BGP_VRF_IMPORT_RT_CFGD              (1 << 1)
 468 #define BGP_VRF_EXPORT_RT_CFGD              (1 << 2)
 469 #define BGP_VRF_RD_CFGD                     (1 << 3)
 470 #define BGP_VRF_L3VNI_PREFIX_ROUTES_ONLY    (1 << 4)
 471
 472
 473         /* unique ID for auto derivation of RD for this vrf */
 474         uint16_t vrf_rd_id;
 475
 476         /* RD for this VRF */
 477         struct prefix_rd vrf_prd;
 478
 479         /* import rt list for the vrf instance */
 480         struct list *vrf_import_rtl;
 481
 482         /* export rt list for the vrf instance */
 483         struct list *vrf_export_rtl;
 484
 485         /* list of corresponding l2vnis (struct bgpevpn) */
 486         struct list *l2vnis;
 487
 488         /* route map for advertise ipv4/ipv6 unicast (type-5 routes) */
 489         struct bgp_rmap adv_cmd_rmap[AFI_MAX][SAFI_MAX];
 490
 491         struct vpn_policy vpn_policy[AFI_MAX];
 492
 493         QOBJ_FIELDS
 494 };
 495 DECLARE_QOBJ_TYPE(bgp)
 496
 497 #define BGP_ROUTE_ADV_HOLD(bgp) (bgp->main_peers_update_hold)
 498
 499 #define IS_BGP_INST_KNOWN_TO_ZEBRA(bgp)                                        \
 500         (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT                           \
 501          || (bgp->inst_type == BGP_INSTANCE_TYPE_VRF                           \
 502              && bgp->vrf_id != VRF_UNKNOWN))
 503
 504 /* BGP peer-group support. */
 505 struct peer_group {
 506         /* Name of the peer-group. */
 507         char *name;
 508
 509         /* Pointer to BGP.  */
 510         struct bgp *bgp;
 511
 512         /* Peer-group client list. */
 513         struct list *peer;
 514
 515         /** Dynamic neighbor listening ranges */
 516         struct list *listen_range[AFI_MAX];
 517
 518         /* Peer-group config */
 519         struct peer *conf;
 520 };
 521
 522 /* BGP Notify message format. */
 523 struct bgp_notify {
 524         uint8_t code;
 525         uint8_t subcode;
 526         char *data;
 527         bgp_size_t length;
 528         uint8_t *raw_data;
 529 };
 530
 531 /* Next hop self address. */
 532 struct bgp_nexthop {
 533         struct interface *ifp;
 534         struct in_addr v4;
 535         struct in6_addr v6_global;
 536         struct in6_addr v6_local;
 537 };
 538
 539 /* BGP addpath values */
 540 #define BGP_ADDPATH_RX     1
 541 #define BGP_ADDPATH_TX     2
 542 #define BGP_ADDPATH_ID_LEN 4
 543
 544 #define BGP_ADDPATH_TX_ID_FOR_DEFAULT_ORIGINATE 1
 545
 546 /* BGP router distinguisher value.  */
 547 #define BGP_RD_SIZE                8
 548
 549 struct bgp_rd {
 550         uint8_t val[BGP_RD_SIZE];
 551 };
 552
 553 #define RMAP_IN  0
 554 #define RMAP_OUT 1
 555 #define RMAP_MAX 2
 556
 557 #include "filter.h"
 558
 559 /* BGP filter structure. */
 560 struct bgp_filter {
 561         /* Distribute-list.  */
 562         struct {
 563                 char *name;
 564                 struct access_list *alist;
 565         } dlist[FILTER_MAX];
 566
 567         /* Prefix-list.  */
 568         struct {
 569                 char *name;
 570                 struct prefix_list *plist;
 571         } plist[FILTER_MAX];
 572
 573         /* Filter-list.  */
 574         struct {
 575                 char *name;
 576                 struct as_list *aslist;
 577         } aslist[FILTER_MAX];
 578
 579         /* Route-map.  */
 580         struct {
 581                 char *name;
 582                 struct route_map *map;
 583         } map[RMAP_MAX];
 584
 585         /* Unsuppress-map.  */
 586         struct {
 587                 char *name;
 588                 struct route_map *map;
 589         } usmap;
 590 };
 591
 592 /* IBGP/EBGP identifier.  We also have a CONFED peer, which is to say,
 593    a peer who's AS is part of our Confederation.  */
 594 typedef enum {
 595         BGP_PEER_IBGP = 1,
 596         BGP_PEER_EBGP,
 597         BGP_PEER_INTERNAL,
 598         BGP_PEER_CONFED,
 599 } bgp_peer_sort_t;
 600
 601 /* BGP message header and packet size.  */
 602 #define BGP_MARKER_SIZE                         16
 603 #define BGP_HEADER_SIZE                         19
 604 #define BGP_MAX_PACKET_SIZE                   4096
 605 #define BGP_MAX_PACKET_SIZE_OVERFLOW          1024
 606
 607 /*
 608  * Trigger delay for bgp_announce_route().
 609  */
 610 #define BGP_ANNOUNCE_ROUTE_SHORT_DELAY_MS  100
 611 #define BGP_ANNOUNCE_ROUTE_DELAY_MS        500
 612
 613 struct peer_af {
 614         /* back pointer to the peer */
 615         struct peer *peer;
 616
 617         /* which subgroup the peer_af belongs to */
 618         struct update_subgroup *subgroup;
 619
 620         /* for being part of an update subgroup's peer list */
 621         LIST_ENTRY(peer_af) subgrp_train;
 622
 623         /* for being part of a packet's peer list */
 624         LIST_ENTRY(peer_af) pkt_train;
 625
 626         struct bpacket *next_pkt_to_send;
 627
 628         /*
 629          * Trigger timer for bgp_announce_route().
 630          */
 631         struct thread *t_announce_route;
 632
 633         afi_t afi;
 634         safi_t safi;
 635         int afid;
 636 };
 637
 638 /* BGP neighbor structure. */
 639 struct peer {
 640         /* BGP structure.  */
 641         struct bgp *bgp;
 642
 643         /* reference count, primarily to allow bgp_process'ing of route_node's
 644          * to be done after a struct peer is deleted.
 645          *
 646          * named 'lock' for hysterical reasons within Quagga.
 647          */
 648         int lock;
 649
 650         /* BGP peer group.  */
 651         struct peer_group *group;
 652         uint64_t version[AFI_MAX][SAFI_MAX];
 653
 654         /* BGP peer_af structures, per configured AF on this peer */
 655         struct peer_af *peer_af_array[BGP_AF_MAX];
 656
 657         /* Peer's remote AS number. */
 658         int as_type;
 659         as_t as;
 660
 661         /* Peer's local AS number. */
 662         as_t local_as;
 663
 664         bgp_peer_sort_t sort;
 665
 666         /* Peer's Change local AS number. */
 667         as_t change_local_as;
 668
 669         /* Remote router ID. */
 670         struct in_addr remote_id;
 671
 672         /* Local router ID. */
 673         struct in_addr local_id;
 674
 675         /* Packet receive and send buffer. */
 676         pthread_mutex_t io_mtx;   // guards ibuf, obuf
 677         struct stream_fifo *ibuf; // packets waiting to be processed
 678         struct stream_fifo *obuf; // packets waiting to be written
 679
 680         struct ringbuf *ibuf_work; // WiP buffer used by bgp_read() only
 681         struct stream *obuf_work;  // WiP buffer used to construct packets
 682
 683         struct stream *curr; // the current packet being parsed
 684
 685         /* We use a separate stream to encode MP_REACH_NLRI for efficient
 686          * NLRI packing. peer->obuf_work stores all the other attributes. The
 687          * actual packet is then constructed by concatenating the two.
 688          */
 689         struct stream *scratch;
 690
 691         /* the doppelganger peer structure, due to dual TCP conn setup */
 692         struct peer *doppelganger;
 693
 694         /* Status of the peer. */
 695         int status;
 696         int ostatus;
 697
 698         /* FSM events, stored for debug purposes.
 699          * Note: uchar used for reduced memory usage.
 700          */
 701         unsigned char cur_event;
 702         unsigned char last_event;
 703         unsigned char last_major_event;
 704
 705         /* Peer index, used for dumping TABLE_DUMP_V2 format */
 706         uint16_t table_dump_index;
 707
 708         /* Peer information */
 709         int fd;              /* File descriptor */
 710         int ttl;             /* TTL of TCP connection to the peer. */
 711         int rtt;             /* Estimated round-trip-time from TCP_INFO */
 712         int gtsm_hops;       /* minimum hopcount to peer */
 713         char *desc;       /* Description of the peer. */
 714         unsigned short port; /* Destination port for peer */
 715         char *host;       /* Printable address of the peer. */
 716         union sockunion su;  /* Sockunion address of the peer. */
 717 #define BGP_PEER_SU_UNSPEC(peer) (peer->su.sa.sa_family == AF_UNSPEC)
 718         time_t uptime;       /* Last Up/Down time */
 719         time_t readtime;     /* Last read time */
 720         time_t resettime;    /* Last reset time */
 721
 722         char *conf_if;   /* neighbor interface config name. */
 723         struct interface *ifp; /* corresponding interface */
 724         char *ifname;     /* bind interface name. */
 725         char *update_if;
 726         union sockunion *update_source;
 727
 728         union sockunion *su_local;  /* Sockunion of local address.  */
 729         union sockunion *su_remote; /* Sockunion of remote address.  */
 730         int shared_network;      /* Is this peer shared same network. */
 731         struct bgp_nexthop nexthop; /* Nexthop */
 732
 733         /* Peer address family configuration. */
 734         uint8_t afc[AFI_MAX][SAFI_MAX];
 735         uint8_t afc_nego[AFI_MAX][SAFI_MAX];
 736         uint8_t afc_adv[AFI_MAX][SAFI_MAX];
 737         uint8_t afc_recv[AFI_MAX][SAFI_MAX];
 738
 739         /* Capability flags (reset in bgp_stop) */
 740         uint32_t cap;
 741 #define PEER_CAP_REFRESH_ADV                (1 << 0) /* refresh advertised */
 742 #define PEER_CAP_REFRESH_OLD_RCV            (1 << 1) /* refresh old received */
 743 #define PEER_CAP_REFRESH_NEW_RCV            (1 << 2) /* refresh rfc received */
 744 #define PEER_CAP_DYNAMIC_ADV                (1 << 3) /* dynamic advertised */
 745 #define PEER_CAP_DYNAMIC_RCV                (1 << 4) /* dynamic received */
 746 #define PEER_CAP_RESTART_ADV                (1 << 5) /* restart advertised */
 747 #define PEER_CAP_RESTART_RCV                (1 << 6) /* restart received */
 748 #define PEER_CAP_AS4_ADV                    (1 << 7) /* as4 advertised */
 749 #define PEER_CAP_AS4_RCV                    (1 << 8) /* as4 received */
 750 #define PEER_CAP_RESTART_BIT_ADV            (1 << 9) /* sent restart state */
 751 #define PEER_CAP_RESTART_BIT_RCV            (1 << 10) /* peer restart state */
 752 #define PEER_CAP_ADDPATH_ADV                (1 << 11) /* addpath advertised */
 753 #define PEER_CAP_ADDPATH_RCV                (1 << 12) /* addpath received */
 754 #define PEER_CAP_ENHE_ADV                   (1 << 13) /* Extended nexthop advertised */
 755 #define PEER_CAP_ENHE_RCV                   (1 << 14) /* Extended nexthop received */
 756 #define PEER_CAP_HOSTNAME_ADV               (1 << 15) /* hostname advertised */
 757 #define PEER_CAP_HOSTNAME_RCV               (1 << 16) /* hostname received */
 758
 759         /* Capability flags (reset in bgp_stop) */
 760         uint32_t af_cap[AFI_MAX][SAFI_MAX];
 761 #define PEER_CAP_ORF_PREFIX_SM_ADV          (1 << 0) /* send-mode advertised */
 762 #define PEER_CAP_ORF_PREFIX_RM_ADV          (1 << 1) /* receive-mode advertised */
 763 #define PEER_CAP_ORF_PREFIX_SM_RCV          (1 << 2) /* send-mode received */
 764 #define PEER_CAP_ORF_PREFIX_RM_RCV          (1 << 3) /* receive-mode received */
 765 #define PEER_CAP_ORF_PREFIX_SM_OLD_RCV      (1 << 4) /* send-mode received */
 766 #define PEER_CAP_ORF_PREFIX_RM_OLD_RCV      (1 << 5) /* receive-mode received */
 767 #define PEER_CAP_RESTART_AF_RCV             (1 << 6) /* graceful restart afi/safi received */
 768 #define PEER_CAP_RESTART_AF_PRESERVE_RCV    (1 << 7) /* graceful restart afi/safi F-bit received */
 769 #define PEER_CAP_ADDPATH_AF_TX_ADV          (1 << 8) /* addpath tx advertised */
 770 #define PEER_CAP_ADDPATH_AF_TX_RCV          (1 << 9) /* addpath tx received */
 771 #define PEER_CAP_ADDPATH_AF_RX_ADV          (1 << 10) /* addpath rx advertised */
 772 #define PEER_CAP_ADDPATH_AF_RX_RCV          (1 << 11) /* addpath rx received */
 773 #define PEER_CAP_ENHE_AF_ADV                (1 << 12) /* Extended nexthopi afi/safi advertised */
 774 #define PEER_CAP_ENHE_AF_RCV                (1 << 13) /* Extended nexthop afi/safi received */
 775 #define PEER_CAP_ENHE_AF_NEGO               (1 << 14) /* Extended nexthop afi/safi negotiated */
 776
 777         /* Global configuration flags. */
 778         uint32_t flags;
 779 #define PEER_FLAG_PASSIVE                   (1 << 0) /* passive mode */
 780 #define PEER_FLAG_SHUTDOWN                  (1 << 1) /* shutdown */
 781 #define PEER_FLAG_DONT_CAPABILITY           (1 << 2) /* dont-capability */
 782 #define PEER_FLAG_OVERRIDE_CAPABILITY       (1 << 3) /* override-capability */
 783 #define PEER_FLAG_STRICT_CAP_MATCH          (1 << 4) /* strict-match */
 784 #define PEER_FLAG_DYNAMIC_CAPABILITY        (1 << 5) /* dynamic capability */
 785 #define PEER_FLAG_DISABLE_CONNECTED_CHECK   (1 << 6) /* disable-connected-check */
 786 #define PEER_FLAG_LOCAL_AS_NO_PREPEND       (1 << 7) /* local-as no-prepend */
 787 #define PEER_FLAG_LOCAL_AS_REPLACE_AS       (1 << 8) /* local-as no-prepend replace-as */
 788 #define PEER_FLAG_DELETE                    (1 << 9) /* mark the peer for deleting */
 789 #define PEER_FLAG_CONFIG_NODE               (1 << 10) /* the node to update configs on */
 790 #define PEER_FLAG_LONESOUL                  (1 << 11)
 791 #define PEER_FLAG_DYNAMIC_NEIGHBOR          (1 << 12) /* dynamic neighbor */
 792 #define PEER_FLAG_CAPABILITY_ENHE           (1 << 13) /* Extended next-hop (rfc 5549)*/
 793 #define PEER_FLAG_IFPEER_V6ONLY             (1 << 14) /* if-based peer is v6 only */
 794 #define PEER_FLAG_IS_RFAPI_HD               (1 << 15) /* attached to rfapi HD */
 795
 796         /* outgoing message sent in CEASE_ADMIN_SHUTDOWN notify */
 797         char *tx_shutdown_message;
 798
 799         /* NSF mode (graceful restart) */
 800         uint8_t nsf[AFI_MAX][SAFI_MAX];
 801
 802         /* Per AF configuration flags. */
 803         uint32_t af_flags[AFI_MAX][SAFI_MAX];
 804 #define PEER_FLAG_SEND_COMMUNITY            (1 << 0) /* send-community */
 805 #define PEER_FLAG_SEND_EXT_COMMUNITY        (1 << 1) /* send-community ext. */
 806 #define PEER_FLAG_NEXTHOP_SELF              (1 << 2) /* next-hop-self */
 807 #define PEER_FLAG_REFLECTOR_CLIENT          (1 << 3) /* reflector-client */
 808 #define PEER_FLAG_RSERVER_CLIENT            (1 << 4) /* route-server-client */
 809 #define PEER_FLAG_SOFT_RECONFIG             (1 << 5) /* soft-reconfiguration */
 810 #define PEER_FLAG_AS_PATH_UNCHANGED         (1 << 6) /* transparent-as */
 811 #define PEER_FLAG_NEXTHOP_UNCHANGED         (1 << 7) /* transparent-next-hop */
 812 #define PEER_FLAG_MED_UNCHANGED             (1 << 8) /* transparent-next-hop */
 813 #define PEER_FLAG_DEFAULT_ORIGINATE         (1 << 9) /* default-originate */
 814 #define PEER_FLAG_REMOVE_PRIVATE_AS         (1 << 10) /* remove-private-as */
 815 #define PEER_FLAG_ALLOWAS_IN                (1 << 11) /* set allowas-in */
 816 #define PEER_FLAG_ORF_PREFIX_SM             (1 << 12) /* orf capability send-mode */
 817 #define PEER_FLAG_ORF_PREFIX_RM             (1 << 13) /* orf capability receive-mode */
 818 #define PEER_FLAG_MAX_PREFIX                (1 << 14) /* maximum prefix */
 819 #define PEER_FLAG_MAX_PREFIX_WARNING        (1 << 15) /* maximum prefix warning-only */
 820 #define PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED   (1 << 16) /* leave link-local nexthop unchanged */
 821 #define PEER_FLAG_FORCE_NEXTHOP_SELF        (1 << 17) /* next-hop-self force */
 822 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL     (1 << 18) /* remove-private-as all */
 823 #define PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE (1 << 19) /* remove-private-as replace-as */
 824 #define PEER_FLAG_AS_OVERRIDE               (1 << 20) /* as-override */
 825 #define PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE (1 << 21) /* remove-private-as all replace-as */
 826 #define PEER_FLAG_ADDPATH_TX_ALL_PATHS      (1 << 22) /* addpath-tx-all-paths */
 827 #define PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS (1 << 23) /* addpath-tx-bestpath-per-AS */
 828 #define PEER_FLAG_WEIGHT                    (1 << 24) /* weight */
 829 #define PEER_FLAG_ALLOWAS_IN_ORIGIN         (1 << 25) /* allowas-in origin */
 830 #define PEER_FLAG_SEND_LARGE_COMMUNITY      (1 << 26) /* Send large Communities */
 831
 832         /* MD5 password */
 833         char *password;
 834
 835         /* default-originate route-map.  */
 836         struct {
 837                 char *name;
 838                 struct route_map *map;
 839         } default_rmap[AFI_MAX][SAFI_MAX];
 840
 841         /* Peer status flags. */
 842         uint16_t sflags;
 843 #define PEER_STATUS_ACCEPT_PEER       (1 << 0) /* accept peer */
 844 #define PEER_STATUS_PREFIX_OVERFLOW   (1 << 1) /* prefix-overflow */
 845 #define PEER_STATUS_CAPABILITY_OPEN   (1 << 2) /* capability open send */
 846 #define PEER_STATUS_HAVE_ACCEPT       (1 << 3) /* accept peer's parent */
 847 #define PEER_STATUS_GROUP             (1 << 4) /* peer-group conf */
 848 #define PEER_STATUS_NSF_MODE          (1 << 5) /* NSF aware peer */
 849 #define PEER_STATUS_NSF_WAIT          (1 << 6) /* wait comeback peer */
 850
 851         /* Peer status af flags (reset in bgp_stop) */
 852         uint16_t af_sflags[AFI_MAX][SAFI_MAX];
 853 #define PEER_STATUS_ORF_PREFIX_SEND   (1 << 0) /* prefix-list send peer */
 854 #define PEER_STATUS_ORF_WAIT_REFRESH  (1 << 1) /* wait refresh received peer */
 855 #define PEER_STATUS_PREFIX_THRESHOLD  (1 << 2) /* exceed prefix-threshold */
 856 #define PEER_STATUS_PREFIX_LIMIT      (1 << 3) /* exceed prefix-limit */
 857 #define PEER_STATUS_EOR_SEND          (1 << 4) /* end-of-rib send to peer */
 858 #define PEER_STATUS_EOR_RECEIVED      (1 << 5) /* end-of-rib received from peer */
 859
 860         /* Default attribute value for the peer. */
 861         uint32_t config;
 862 #define PEER_CONFIG_TIMER             (1 << 0) /* keepalive & holdtime */
 863 #define PEER_CONFIG_CONNECT           (1 << 1) /* connect */
 864 #define PEER_CONFIG_ROUTEADV          (1 << 2) /* route advertise */
 865 #define PEER_GROUP_CONFIG_TIMER       (1 << 3) /* timers from peer-group */
 866
 867 #define PEER_OR_GROUP_TIMER_SET(peer)                                          \
 868         (CHECK_FLAG(peer->config, PEER_CONFIG_TIMER)                           \
 869          || CHECK_FLAG(peer->config, PEER_GROUP_CONFIG_TIMER))
 870
 871         _Atomic uint32_t holdtime;
 872         _Atomic uint32_t keepalive;
 873         _Atomic uint32_t connect;
 874         _Atomic uint32_t routeadv;
 875
 876         /* Timer values. */
 877         _Atomic uint32_t v_start;
 878         _Atomic uint32_t v_connect;
 879         _Atomic uint32_t v_holdtime;
 880         _Atomic uint32_t v_keepalive;
 881         _Atomic uint32_t v_routeadv;
 882         _Atomic uint32_t v_pmax_restart;
 883         _Atomic uint32_t v_gr_restart;
 884
 885         /* Threads. */
 886         struct thread *t_read;
 887         struct thread *t_write;
 888         struct thread *t_start;
 889         struct thread *t_connect_check_r;
 890         struct thread *t_connect_check_w;
 891         struct thread *t_connect;
 892         struct thread *t_holdtime;
 893         struct thread *t_routeadv;
 894         struct thread *t_pmax_restart;
 895         struct thread *t_gr_restart;
 896         struct thread *t_gr_stale;
 897         struct thread *t_generate_updgrp_packets;
 898         struct thread *t_process_packet;
 899
 900         /* Thread flags. */
 901         _Atomic uint16_t thread_flags;
 902 #define PEER_THREAD_WRITES_ON         (1 << 0)
 903 #define PEER_THREAD_READS_ON          (1 << 1)
 904 #define PEER_THREAD_KEEPALIVES_ON     (1 << 2)
 905         /* workqueues */
 906         struct work_queue *clear_node_queue;
 907
 908 #define PEER_TOTAL_RX(peer)                                                    \
 909         atomic_load_explicit(&peer->open_in, memory_order_relaxed)             \
 910                 + atomic_load_explicit(&peer->update_in, memory_order_relaxed) \
 911                 + atomic_load_explicit(&peer->notify_in, memory_order_relaxed) \
 912                 + atomic_load_explicit(&peer->refresh_in,                      \
 913                                        memory_order_relaxed)                   \
 914                 + atomic_load_explicit(&peer->keepalive_in,                    \
 915                                        memory_order_relaxed)                   \
 916                 + atomic_load_explicit(&peer->dynamic_cap_in,                  \
 917                                        memory_order_relaxed)
 918
 919 #define PEER_TOTAL_TX(peer)                                                    \
 920         atomic_load_explicit(&peer->open_out, memory_order_relaxed)            \
 921                 + atomic_load_explicit(&peer->update_out,                      \
 922                                        memory_order_relaxed)                   \
 923                 + atomic_load_explicit(&peer->notify_out,                      \
 924                                        memory_order_relaxed)                   \
 925                 + atomic_load_explicit(&peer->refresh_out,                     \
 926                                        memory_order_relaxed)                   \
 927                 + atomic_load_explicit(&peer->keepalive_out,                   \
 928                                        memory_order_relaxed)                   \
 929                 + atomic_load_explicit(&peer->dynamic_cap_out,                 \
 930                                        memory_order_relaxed)
 931
 932         /* Statistics field */
 933         _Atomic uint32_t open_in;        /* Open message input count */
 934         _Atomic uint32_t open_out;      /* Open message output count */
 935         _Atomic uint32_t update_in;       /* Update message input count */
 936         _Atomic uint32_t update_out;      /* Update message ouput count */
 937         _Atomic time_t update_time;       /* Update message received time. */
 938         _Atomic uint32_t keepalive_in;    /* Keepalive input count */
 939         _Atomic uint32_t keepalive_out;   /* Keepalive output count */
 940         _Atomic uint32_t notify_in;       /* Notify input count */
 941         _Atomic uint32_t notify_out;      /* Notify output count */
 942         _Atomic uint32_t refresh_in;      /* Route Refresh input count */
 943         _Atomic uint32_t refresh_out;     /* Route Refresh output count */
 944         _Atomic uint32_t dynamic_cap_in;  /* Dynamic Capability input count.  */
 945         _Atomic uint32_t dynamic_cap_out; /* Dynamic Capability output count. */
 946
 947         /* BGP state count */
 948         uint32_t established; /* Established */
 949         uint32_t dropped;     /* Dropped */
 950
 951         /* Update delay related fields */
 952         uint8_t update_delay_over; /* When this is set, BGP is no more waiting
 953                                      for EOR */
 954
 955         /* Syncronization list and time.  */
 956         struct bgp_synchronize *sync[AFI_MAX][SAFI_MAX];
 957         time_t synctime;
 958         /* timestamp when the last UPDATE msg was written */
 959         _Atomic time_t last_write;
 960         /* timestamp when the last msg was written */
 961         _Atomic time_t last_update;
 962
 963         /* Send prefix count. */
 964         unsigned long scount[AFI_MAX][SAFI_MAX];
 965
 966         /* Notify data. */
 967         struct bgp_notify notify;
 968
 969         /* Filter structure. */
 970         struct bgp_filter filter[AFI_MAX][SAFI_MAX];
 971
 972         /* ORF Prefix-list */
 973         struct prefix_list *orf_plist[AFI_MAX][SAFI_MAX];
 974
 975         /* Text description of last attribute rcvd */
 976         char rcvd_attr_str[BUFSIZ];
 977
 978         /* Track if we printed the attribute in debugs */
 979         int rcvd_attr_printed;
 980
 981         /* Prefix count. */
 982         unsigned long pcount[AFI_MAX][SAFI_MAX];
 983
 984         /* Max prefix count. */
 985         unsigned long pmax[AFI_MAX][SAFI_MAX];
 986         uint8_t pmax_threshold[AFI_MAX][SAFI_MAX];
 987         uint16_t pmax_restart[AFI_MAX][SAFI_MAX];
 988 #define MAXIMUM_PREFIX_THRESHOLD_DEFAULT 75
 989
 990         /* allowas-in. */
 991         char allowas_in[AFI_MAX][SAFI_MAX];
 992
 993         /* weight */
 994         unsigned long weight[AFI_MAX][SAFI_MAX];
 995
 996         /* peer reset cause */
 997         char last_reset;
 998 #define PEER_DOWN_RID_CHANGE             1 /* bgp router-id command */
 999 #define PEER_DOWN_REMOTE_AS_CHANGE       2 /* neighbor remote-as command */
1000 #define PEER_DOWN_LOCAL_AS_CHANGE        3 /* neighbor local-as command */
1001 #define PEER_DOWN_CLID_CHANGE            4 /* bgp cluster-id command */
1002 #define PEER_DOWN_CONFED_ID_CHANGE       5 /* bgp confederation identifier command */
1003 #define PEER_DOWN_CONFED_PEER_CHANGE     6 /* bgp confederation peer command */
1004 #define PEER_DOWN_RR_CLIENT_CHANGE       7 /* neighbor route-reflector-client command */
1005 #define PEER_DOWN_RS_CLIENT_CHANGE       8 /* neighbor route-server-client command */
1006 #define PEER_DOWN_UPDATE_SOURCE_CHANGE   9 /* neighbor update-source command */
1007 #define PEER_DOWN_AF_ACTIVATE           10 /* neighbor activate command */
1008 #define PEER_DOWN_USER_SHUTDOWN         11 /* neighbor shutdown command */
1009 #define PEER_DOWN_USER_RESET            12 /* clear ip bgp command */
1010 #define PEER_DOWN_NOTIFY_RECEIVED       13 /* notification received */
1011 #define PEER_DOWN_NOTIFY_SEND           14 /* notification send */
1012 #define PEER_DOWN_CLOSE_SESSION         15 /* tcp session close */
1013 #define PEER_DOWN_NEIGHBOR_DELETE       16 /* neghbor delete */
1014 #define PEER_DOWN_RMAP_BIND             17 /* neghbor peer-group command */
1015 #define PEER_DOWN_RMAP_UNBIND           18 /* no neighbor peer-group command */
1016 #define PEER_DOWN_CAPABILITY_CHANGE     19 /* neighbor capability command */
1017 #define PEER_DOWN_PASSIVE_CHANGE        20 /* neighbor passive command */
1018 #define PEER_DOWN_MULTIHOP_CHANGE       21 /* neighbor multihop command */
1019 #define PEER_DOWN_NSF_CLOSE_SESSION     22 /* NSF tcp session close */
1020 #define PEER_DOWN_V6ONLY_CHANGE         23 /* if-based peering v6only toggled */
1021 #define PEER_DOWN_BFD_DOWN              24 /* BFD down */
1022 #define PEER_DOWN_IF_DOWN               25 /* Interface down */
1023 #define PEER_DOWN_NBR_ADDR_DEL          26 /* Peer address lost */
1024         unsigned long last_reset_cause_size;
1025         uint8_t last_reset_cause[BGP_MAX_PACKET_SIZE];
1026
1027         /* The kind of route-map Flags.*/
1028         uint8_t rmap_type;
1029 #define PEER_RMAP_TYPE_IN             (1 << 0) /* neighbor route-map in */
1030 #define PEER_RMAP_TYPE_OUT            (1 << 1) /* neighbor route-map out */
1031 #define PEER_RMAP_TYPE_NETWORK        (1 << 2) /* network route-map */
1032 #define PEER_RMAP_TYPE_REDISTRIBUTE   (1 << 3) /* redistribute route-map */
1033 #define PEER_RMAP_TYPE_DEFAULT        (1 << 4) /* default-originate route-map */
1034 #define PEER_RMAP_TYPE_NOSET          (1 << 5) /* not allow to set commands */
1035 #define PEER_RMAP_TYPE_IMPORT         (1 << 6) /* neighbor route-map import */
1036 #define PEER_RMAP_TYPE_EXPORT         (1 << 7) /* neighbor route-map export */
1037
1038         /* peer specific BFD information */
1039         struct bfd_info *bfd_info;
1040
1041         /* hostname and domainname advertised by host */
1042         char *hostname;
1043         char *domainname;
1044
1045         QOBJ_FIELDS
1046 };
1047 DECLARE_QOBJ_TYPE(peer)
1048
1049 /* Check if suppress start/restart of sessions to peer. */
1050 #define BGP_PEER_START_SUPPRESSED(P)                                           \
1051         (CHECK_FLAG((P)->flags, PEER_FLAG_SHUTDOWN)                            \
1052          || CHECK_FLAG((P)->sflags, PEER_STATUS_PREFIX_OVERFLOW))
1053
1054 #define PEER_PASSWORD_MINLEN    (1)
1055 #define PEER_PASSWORD_MAXLEN    (80)
1056
1057 /* This structure's member directly points incoming packet data
1058    stream. */
1059 struct bgp_nlri {
1060         /* AFI.  */
1061         uint16_t afi; /* iana_afi_t */
1062
1063         /* SAFI.  */
1064         uint8_t safi; /* iana_safi_t */
1065
1066         /* Pointer to NLRI byte stream.  */
1067         uint8_t *nlri;
1068
1069         /* Length of whole NLRI.  */
1070         bgp_size_t length;
1071 };
1072
1073 /* BGP versions.  */
1074 #define BGP_VERSION_4                            4
1075
1076 /* Default BGP port number.  */
1077 #define BGP_PORT_DEFAULT                       179
1078
1079 /* BGP minimum message size.  */
1080 #define BGP_MSG_OPEN_MIN_SIZE                   (BGP_HEADER_SIZE + 10)
1081 #define BGP_MSG_UPDATE_MIN_SIZE                 (BGP_HEADER_SIZE + 4)
1082 #define BGP_MSG_NOTIFY_MIN_SIZE                 (BGP_HEADER_SIZE + 2)
1083 #define BGP_MSG_KEEPALIVE_MIN_SIZE              (BGP_HEADER_SIZE + 0)
1084 #define BGP_MSG_ROUTE_REFRESH_MIN_SIZE          (BGP_HEADER_SIZE + 4)
1085 #define BGP_MSG_CAPABILITY_MIN_SIZE             (BGP_HEADER_SIZE + 3)
1086
1087 /* BGP message types.  */
1088 #define BGP_MSG_OPEN                             1
1089 #define BGP_MSG_UPDATE                           2
1090 #define BGP_MSG_NOTIFY                           3
1091 #define BGP_MSG_KEEPALIVE                        4
1092 #define BGP_MSG_ROUTE_REFRESH_NEW                5
1093 #define BGP_MSG_CAPABILITY                       6
1094 #define BGP_MSG_ROUTE_REFRESH_OLD              128
1095
1096 /* BGP open optional parameter.  */
1097 #define BGP_OPEN_OPT_AUTH                        1
1098 #define BGP_OPEN_OPT_CAP                         2
1099
1100 /* BGP4 attribute type codes.  */
1101 #define BGP_ATTR_ORIGIN                          1
1102 #define BGP_ATTR_AS_PATH                         2
1103 #define BGP_ATTR_NEXT_HOP                        3
1104 #define BGP_ATTR_MULTI_EXIT_DISC                 4
1105 #define BGP_ATTR_LOCAL_PREF                      5
1106 #define BGP_ATTR_ATOMIC_AGGREGATE                6
1107 #define BGP_ATTR_AGGREGATOR                      7
1108 #define BGP_ATTR_COMMUNITIES                     8
1109 #define BGP_ATTR_ORIGINATOR_ID                   9
1110 #define BGP_ATTR_CLUSTER_LIST                   10
1111 #define BGP_ATTR_DPA                            11
1112 #define BGP_ATTR_ADVERTISER                     12
1113 #define BGP_ATTR_RCID_PATH                      13
1114 #define BGP_ATTR_MP_REACH_NLRI                  14
1115 #define BGP_ATTR_MP_UNREACH_NLRI                15
1116 #define BGP_ATTR_EXT_COMMUNITIES                16
1117 #define BGP_ATTR_AS4_PATH                       17
1118 #define BGP_ATTR_AS4_AGGREGATOR                 18
1119 #define BGP_ATTR_AS_PATHLIMIT                   21
1120 #define BGP_ATTR_PMSI_TUNNEL                    22
1121 #define BGP_ATTR_ENCAP                          23
1122 #define BGP_ATTR_LARGE_COMMUNITIES              32
1123 #define BGP_ATTR_PREFIX_SID                     40
1124 #if ENABLE_BGP_VNC
1125 #define BGP_ATTR_VNC                           255
1126 #endif
1127
1128 /* BGP update origin.  */
1129 #define BGP_ORIGIN_IGP                           0
1130 #define BGP_ORIGIN_EGP                           1
1131 #define BGP_ORIGIN_INCOMPLETE                    2
1132
1133 /* BGP notify message codes.  */
1134 #define BGP_NOTIFY_HEADER_ERR                    1
1135 #define BGP_NOTIFY_OPEN_ERR                      2
1136 #define BGP_NOTIFY_UPDATE_ERR                    3
1137 #define BGP_NOTIFY_HOLD_ERR                      4
1138 #define BGP_NOTIFY_FSM_ERR                       5
1139 #define BGP_NOTIFY_CEASE                         6
1140 #define BGP_NOTIFY_CAPABILITY_ERR                7
1141
1142 #define BGP_NOTIFY_SUBCODE_UNSPECIFIC            0
1143
1144 /* BGP_NOTIFY_HEADER_ERR sub codes.  */
1145 #define BGP_NOTIFY_HEADER_NOT_SYNC               1
1146 #define BGP_NOTIFY_HEADER_BAD_MESLEN             2
1147 #define BGP_NOTIFY_HEADER_BAD_MESTYPE            3
1148
1149 /* BGP_NOTIFY_OPEN_ERR sub codes.  */
1150 #define BGP_NOTIFY_OPEN_MALFORMED_ATTR           0
1151 #define BGP_NOTIFY_OPEN_UNSUP_VERSION            1
1152 #define BGP_NOTIFY_OPEN_BAD_PEER_AS              2
1153 #define BGP_NOTIFY_OPEN_BAD_BGP_IDENT            3
1154 #define BGP_NOTIFY_OPEN_UNSUP_PARAM              4
1155 #define BGP_NOTIFY_OPEN_AUTH_FAILURE             5
1156 #define BGP_NOTIFY_OPEN_UNACEP_HOLDTIME          6
1157 #define BGP_NOTIFY_OPEN_UNSUP_CAPBL              7
1158
1159 /* BGP_NOTIFY_UPDATE_ERR sub codes.  */
1160 #define BGP_NOTIFY_UPDATE_MAL_ATTR               1
1161 #define BGP_NOTIFY_UPDATE_UNREC_ATTR             2
1162 #define BGP_NOTIFY_UPDATE_MISS_ATTR              3
1163 #define BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR          4
1164 #define BGP_NOTIFY_UPDATE_ATTR_LENG_ERR          5
1165 #define BGP_NOTIFY_UPDATE_INVAL_ORIGIN           6
1166 #define BGP_NOTIFY_UPDATE_AS_ROUTE_LOOP          7
1167 #define BGP_NOTIFY_UPDATE_INVAL_NEXT_HOP         8
1168 #define BGP_NOTIFY_UPDATE_OPT_ATTR_ERR           9
1169 #define BGP_NOTIFY_UPDATE_INVAL_NETWORK         10
1170 #define BGP_NOTIFY_UPDATE_MAL_AS_PATH           11
1171
1172 /* BGP_NOTIFY_CEASE sub codes (RFC 4486).  */
1173 #define BGP_NOTIFY_CEASE_MAX_PREFIX              1
1174 #define BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN          2
1175 #define BGP_NOTIFY_CEASE_PEER_UNCONFIG           3
1176 #define BGP_NOTIFY_CEASE_ADMIN_RESET             4
1177 #define BGP_NOTIFY_CEASE_CONNECT_REJECT          5
1178 #define BGP_NOTIFY_CEASE_CONFIG_CHANGE           6
1179 #define BGP_NOTIFY_CEASE_COLLISION_RESOLUTION    7
1180 #define BGP_NOTIFY_CEASE_OUT_OF_RESOURCE         8
1181
1182 /* BGP_NOTIFY_CAPABILITY_ERR sub codes (draft-ietf-idr-dynamic-cap-02). */
1183 #define BGP_NOTIFY_CAPABILITY_INVALID_ACTION     1
1184 #define BGP_NOTIFY_CAPABILITY_INVALID_LENGTH     2
1185 #define BGP_NOTIFY_CAPABILITY_MALFORMED_CODE     3
1186
1187 /* BGP finite state machine status.  */
1188 #define Idle                                     1
1189 #define Connect                                  2
1190 #define Active                                   3
1191 #define OpenSent                                 4
1192 #define OpenConfirm                              5
1193 #define Established                              6
1194 #define Clearing                                 7
1195 #define Deleted                                  8
1196 #define BGP_STATUS_MAX                           9
1197
1198 /* BGP finite state machine events.  */
1199 #define BGP_Start                                1
1200 #define BGP_Stop                                 2
1201 #define TCP_connection_open                      3
1202 #define TCP_connection_closed                    4
1203 #define TCP_connection_open_failed               5
1204 #define TCP_fatal_error                          6
1205 #define ConnectRetry_timer_expired               7
1206 #define Hold_Timer_expired                       8
1207 #define KeepAlive_timer_expired                  9
1208 #define Receive_OPEN_message                    10
1209 #define Receive_KEEPALIVE_message               11
1210 #define Receive_UPDATE_message                  12
1211 #define Receive_NOTIFICATION_message            13
1212 #define Clearing_Completed                      14
1213 #define BGP_EVENTS_MAX                          15
1214
1215 /* BGP timers default value.  */
1216 /* note: the DFLT_ ones depend on compile-time "defaults" selection */
1217 #define BGP_INIT_START_TIMER                     1
1218 #define BGP_DEFAULT_HOLDTIME                      DFLT_BGP_HOLDTIME
1219 #define BGP_DEFAULT_KEEPALIVE                     DFLT_BGP_KEEPALIVE
1220 #define BGP_DEFAULT_EBGP_ROUTEADV                0
1221 #define BGP_DEFAULT_IBGP_ROUTEADV                0
1222 #define BGP_DEFAULT_CONNECT_RETRY                 DFLT_BGP_TIMERS_CONNECT
1223
1224 /* BGP default local preference.  */
1225 #define BGP_DEFAULT_LOCAL_PREF                 100
1226
1227 /* BGP local-preference to send when 'bgp graceful-shutdown'
1228  * is configured */
1229 #define BGP_GSHUT_LOCAL_PREF                     0
1230
1231 /* BGP default subgroup packet queue max .  */
1232 #define BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX      40
1233
1234 /* BGP graceful restart  */
1235 #define BGP_DEFAULT_RESTART_TIME               120
1236 #define BGP_DEFAULT_STALEPATH_TIME             360
1237
1238 /* BGP uptime string length.  */
1239 #define BGP_UPTIME_LEN 25
1240
1241 /* Default configuration settings for bgpd.  */
1242 #define BGP_VTY_PORT                          2605
1243 #define BGP_DEFAULT_CONFIG             "bgpd.conf"
1244
1245 /* Check AS path loop when we send NLRI.  */
1246 /* #define BGP_SEND_ASPATH_CHECK */
1247
1248 /* BGP Dynamic Neighbors feature */
1249 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT    100
1250 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MIN          1
1251 #define BGP_DYNAMIC_NEIGHBORS_LIMIT_MAX       5000
1252
1253 /* Flag for peer_clear_soft().  */
1254 enum bgp_clear_type {
1255         BGP_CLEAR_SOFT_NONE,
1256         BGP_CLEAR_SOFT_OUT,
1257         BGP_CLEAR_SOFT_IN,
1258         BGP_CLEAR_SOFT_BOTH,
1259         BGP_CLEAR_SOFT_IN_ORF_PREFIX
1260 };
1261
1262 /* Macros. */
1263 #define BGP_INPUT(P)         ((P)->curr)
1264 #define BGP_INPUT_PNT(P)     (stream_pnt(BGP_INPUT(P)))
1265 #define BGP_IS_VALID_STATE_FOR_NOTIF(S)                                        \
1266         (((S) == OpenSent) || ((S) == OpenConfirm) || ((S) == Established))
1267
1268 /* BGP error codes.  */
1269 #define BGP_SUCCESS                               0
1270 #define BGP_ERR_INVALID_VALUE                    -1
1271 #define BGP_ERR_INVALID_FLAG                     -2
1272 #define BGP_ERR_INVALID_AS                       -3
1273 #define BGP_ERR_INVALID_BGP                      -4
1274 #define BGP_ERR_PEER_GROUP_MEMBER                -5
1275 #define BGP_ERR_MULTIPLE_INSTANCE_USED           -6
1276 #define BGP_ERR_PEER_GROUP_NO_REMOTE_AS          -7
1277 #define BGP_ERR_PEER_GROUP_CANT_CHANGE           -8
1278 #define BGP_ERR_PEER_GROUP_MISMATCH              -9
1279 #define BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT  -10
1280 #define BGP_ERR_MULTIPLE_INSTANCE_NOT_SET       -11
1281 #define BGP_ERR_AS_MISMATCH                     -12
1282 #define BGP_ERR_PEER_FLAG_CONFLICT              -13
1283 #define BGP_ERR_PEER_GROUP_SHUTDOWN             -14
1284 #define BGP_ERR_PEER_FILTER_CONFLICT            -15
1285 #define BGP_ERR_NOT_INTERNAL_PEER               -16
1286 #define BGP_ERR_REMOVE_PRIVATE_AS               -17
1287 #define BGP_ERR_AF_UNCONFIGURED                 -18
1288 #define BGP_ERR_SOFT_RECONFIG_UNCONFIGURED      -19
1289 #define BGP_ERR_INSTANCE_MISMATCH               -20
1290 #define BGP_ERR_LOCAL_AS_ALLOWED_ONLY_FOR_EBGP  -21
1291 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS    -22
1292 #define BGP_ERR_TCPSIG_FAILED                   -23
1293 #define BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK   -24
1294 #define BGP_ERR_NO_IBGP_WITH_TTLHACK            -25
1295 #define BGP_ERR_NO_INTERFACE_CONFIG             -26
1296 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS_REMOTE_AS    -27
1297 #define BGP_ERR_AS_OVERRIDE                     -28
1298 #define BGP_ERR_INVALID_DYNAMIC_NEIGHBORS_LIMIT -29
1299 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_EXISTS  -30
1300 #define BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_NOT_FOUND -31
1301 #define BGP_ERR_INVALID_FOR_DYNAMIC_PEER        -32
1302 #define BGP_ERR_MAX                             -33
1303 #define BGP_ERR_INVALID_FOR_DIRECT_PEER         -34
1304 #define BGP_ERR_PEER_SAFI_CONFLICT              -35
1305
1306 /*
1307  * Enumeration of different policy kinds a peer can be configured with.
1308  */
1309 typedef enum {
1310         BGP_POLICY_ROUTE_MAP,
1311         BGP_POLICY_FILTER_LIST,
1312         BGP_POLICY_PREFIX_LIST,
1313         BGP_POLICY_DISTRIBUTE_LIST,
1314 } bgp_policy_type_e;
1315
1316 extern struct bgp_master *bm;
1317 extern unsigned int multipath_num;
1318
1319 /* Prototypes. */
1320 extern void bgp_terminate(void);
1321 extern void bgp_reset(void);
1322 extern time_t bgp_clock(void);
1323 extern void bgp_zclient_reset(void);
1324 extern int bgp_nexthop_set(union sockunion *, union sockunion *,
1325                            struct bgp_nexthop *, struct peer *);
1326 extern struct bgp *bgp_get_default(void);
1327 extern struct bgp *bgp_lookup(as_t, const char *);
1328 extern struct bgp *bgp_lookup_by_name(const char *);
1329 extern struct bgp *bgp_lookup_by_vrf_id(vrf_id_t);
1330 extern struct peer *peer_lookup(struct bgp *, union sockunion *);
1331 extern struct peer *peer_lookup_by_conf_if(struct bgp *, const char *);
1332 extern struct peer *peer_lookup_by_hostname(struct bgp *, const char *);
1333 extern void bgp_peer_conf_if_to_su_update(struct peer *);
1334 extern int peer_group_listen_range_del(struct peer_group *, struct prefix *);
1335 extern struct peer_group *peer_group_lookup(struct bgp *, const char *);
1336 extern struct peer_group *peer_group_get(struct bgp *, const char *);
1337 extern struct peer *peer_create_bind_dynamic_neighbor(struct bgp *,
1338                                                       union sockunion *,
1339                                                       struct peer_group *);
1340 extern struct prefix *
1341 peer_group_lookup_dynamic_neighbor_range(struct peer_group *, struct prefix *);
1342 extern struct peer_group *peer_group_lookup_dynamic_neighbor(struct bgp *,
1343                                                              struct prefix *,
1344                                                              struct prefix **);
1345 extern struct peer *peer_lookup_dynamic_neighbor(struct bgp *,
1346                                                  union sockunion *);
1347 extern void peer_drop_dynamic_neighbor(struct peer *);
1348
1349 /*
1350  * Peers are incredibly easy to memory leak
1351  * due to the various ways that they are actually used
1352  * Provide some functionality to debug locks and unlocks
1353  */
1354 extern struct peer *peer_lock_with_caller(const char *, struct peer *);
1355 extern struct peer *peer_unlock_with_caller(const char *, struct peer *);
1356 #define peer_unlock(A) peer_unlock_with_caller(__FUNCTION__, (A))
1357 #define peer_lock(B) peer_lock_with_caller(__FUNCTION__, (B))
1358
1359 extern bgp_peer_sort_t peer_sort(struct peer *peer);
1360 extern int peer_active(struct peer *);
1361 extern int peer_active_nego(struct peer *);
1362 extern void bgp_recalculate_all_bestpaths(struct bgp *bgp);
1363 extern struct peer *peer_create(union sockunion *, const char *, struct bgp *,
1364                                 as_t, as_t, int, afi_t, safi_t,
1365                                 struct peer_group *);
1366 extern struct peer *peer_create_accept(struct bgp *);
1367 extern void peer_xfer_config(struct peer *dst, struct peer *src);
1368 extern char *peer_uptime(time_t, char *, size_t, uint8_t, json_object *);
1369
1370 extern int bgp_config_write(struct vty *);
1371
1372 extern void bgp_master_init(struct thread_master *master);
1373
1374 extern void bgp_init(void);
1375 extern void bgp_pthreads_run(void);
1376 extern void bgp_pthreads_finish(void);
1377 extern void bgp_route_map_init(void);
1378 extern void bgp_session_reset(struct peer *);
1379
1380 extern int bgp_option_set(int);
1381 extern int bgp_option_unset(int);
1382 extern int bgp_option_check(int);
1383
1384 extern int bgp_get(struct bgp **, as_t *, const char *, enum bgp_instance_type);
1385 extern void bgp_instance_up(struct bgp *);
1386 extern void bgp_instance_down(struct bgp *);
1387 extern int bgp_delete(struct bgp *);
1388
1389 extern int bgp_handle_socket(struct bgp *bgp, struct vrf *vrf,
1390                              vrf_id_t old_vrf_id, bool create);
1391
1392 extern int bgp_flag_set(struct bgp *, int);
1393 extern int bgp_flag_unset(struct bgp *, int);
1394 extern int bgp_flag_check(struct bgp *, int);
1395
1396 extern void bgp_router_id_zebra_bump(vrf_id_t, const struct prefix *);
1397 extern int bgp_router_id_static_set(struct bgp *, struct in_addr);
1398
1399 extern int bgp_cluster_id_set(struct bgp *, struct in_addr *);
1400 extern int bgp_cluster_id_unset(struct bgp *);
1401
1402 extern int bgp_confederation_id_set(struct bgp *, as_t);
1403 extern int bgp_confederation_id_unset(struct bgp *);
1404 extern int bgp_confederation_peers_check(struct bgp *, as_t);
1405
1406 extern int bgp_confederation_peers_add(struct bgp *, as_t);
1407 extern int bgp_confederation_peers_remove(struct bgp *, as_t);
1408
1409 extern int bgp_timers_set(struct bgp *, uint32_t keepalive, uint32_t holdtime);
1410 extern int bgp_timers_unset(struct bgp *);
1411
1412 extern int bgp_default_local_preference_set(struct bgp *, uint32_t);
1413 extern int bgp_default_local_preference_unset(struct bgp *);
1414
1415 extern int bgp_default_subgroup_pkt_queue_max_set(struct bgp *bgp, uint32_t);
1416 extern int bgp_default_subgroup_pkt_queue_max_unset(struct bgp *bgp);
1417
1418 extern int bgp_listen_limit_set(struct bgp *, int);
1419 extern int bgp_listen_limit_unset(struct bgp *);
1420
1421 extern int bgp_update_delay_active(struct bgp *);
1422 extern int bgp_update_delay_configured(struct bgp *);
1423 extern int bgp_afi_safi_peer_exists(struct bgp *bgp, afi_t afi, safi_t safi);
1424 extern void peer_as_change(struct peer *, as_t, int);
1425 extern int peer_remote_as(struct bgp *, union sockunion *, const char *, as_t *,
1426                           int, afi_t, safi_t);
1427 extern int peer_group_remote_as(struct bgp *, const char *, as_t *, int);
1428 extern int peer_delete(struct peer *peer);
1429 extern int peer_group_delete(struct peer_group *);
1430 extern int peer_group_remote_as_delete(struct peer_group *);
1431 extern int peer_group_listen_range_add(struct peer_group *, struct prefix *);
1432
1433 extern int peer_activate(struct peer *, afi_t, safi_t);
1434 extern int peer_deactivate(struct peer *, afi_t, safi_t);
1435 extern int peer_afc_set(struct peer *, afi_t, safi_t, int);
1436
1437 extern int peer_group_bind(struct bgp *, union sockunion *, struct peer *,
1438                            struct peer_group *, as_t *);
1439 extern int peer_group_unbind(struct bgp *, struct peer *, struct peer_group *);
1440
1441 extern int peer_flag_set(struct peer *, uint32_t);
1442 extern int peer_flag_unset(struct peer *, uint32_t);
1443
1444 extern int peer_af_flag_set(struct peer *, afi_t, safi_t, uint32_t);
1445 extern int peer_af_flag_unset(struct peer *, afi_t, safi_t, uint32_t);
1446 extern int peer_af_flag_check(struct peer *, afi_t, safi_t, uint32_t);
1447
1448 extern int peer_ebgp_multihop_set(struct peer *, int);
1449 extern int peer_ebgp_multihop_unset(struct peer *);
1450 extern int is_ebgp_multihop_configured(struct peer *peer);
1451
1452 extern int peer_description_set(struct peer *, const char *);
1453 extern int peer_description_unset(struct peer *);
1454
1455 extern int peer_update_source_if_set(struct peer *, const char *);
1456 extern int peer_update_source_addr_set(struct peer *, const union sockunion *);
1457 extern int peer_update_source_unset(struct peer *);
1458
1459 extern int peer_default_originate_set(struct peer *, afi_t, safi_t,
1460                                       const char *);
1461 extern int peer_default_originate_unset(struct peer *, afi_t, safi_t);
1462
1463 extern int peer_port_set(struct peer *, uint16_t);
1464 extern int peer_port_unset(struct peer *);
1465
1466 extern int peer_weight_set(struct peer *, afi_t, safi_t, uint16_t);
1467 extern int peer_weight_unset(struct peer *, afi_t, safi_t);
1468
1469 extern int peer_timers_set(struct peer *, uint32_t keepalive,
1470                            uint32_t holdtime);
1471 extern int peer_timers_unset(struct peer *);
1472
1473 extern int peer_timers_connect_set(struct peer *, uint32_t);
1474 extern int peer_timers_connect_unset(struct peer *);
1475
1476 extern int peer_advertise_interval_set(struct peer *, uint32_t);
1477 extern int peer_advertise_interval_unset(struct peer *);
1478
1479 extern void peer_interface_set(struct peer *, const char *);
1480 extern void peer_interface_unset(struct peer *);
1481
1482 extern int peer_distribute_set(struct peer *, afi_t, safi_t, int, const char *);
1483 extern int peer_distribute_unset(struct peer *, afi_t, safi_t, int);
1484
1485 extern int peer_allowas_in_set(struct peer *, afi_t, safi_t, int, int);
1486 extern int peer_allowas_in_unset(struct peer *, afi_t, safi_t);
1487
1488 extern int peer_local_as_set(struct peer *, as_t, int, int);
1489 extern int peer_local_as_unset(struct peer *);
1490
1491 extern int peer_prefix_list_set(struct peer *, afi_t, safi_t, int,
1492                                 const char *);
1493 extern int peer_prefix_list_unset(struct peer *, afi_t, safi_t, int);
1494
1495 extern int peer_aslist_set(struct peer *, afi_t, safi_t, int, const char *);
1496 extern int peer_aslist_unset(struct peer *, afi_t, safi_t, int);
1497
1498 extern int peer_route_map_set(struct peer *, afi_t, safi_t, int, const char *);
1499 extern int peer_route_map_unset(struct peer *, afi_t, safi_t, int);
1500
1501 extern int peer_unsuppress_map_set(struct peer *, afi_t, safi_t, const char *);
1502
1503 extern int peer_password_set(struct peer *, const char *);
1504 extern int peer_password_unset(struct peer *);
1505
1506 extern int peer_unsuppress_map_unset(struct peer *, afi_t, safi_t);
1507
1508 extern int peer_maximum_prefix_set(struct peer *, afi_t, safi_t, uint32_t,
1509                                    uint8_t, int, uint16_t);
1510 extern int peer_maximum_prefix_unset(struct peer *, afi_t, safi_t);
1511
1512 extern int peer_clear(struct peer *, struct listnode **);
1513 extern int peer_clear_soft(struct peer *, afi_t, safi_t, enum bgp_clear_type);
1514
1515 extern int peer_ttl_security_hops_set(struct peer *, int);
1516 extern int peer_ttl_security_hops_unset(struct peer *);
1517
1518 extern int peer_tx_shutdown_message_set(struct peer *, const char *msg);
1519 extern int peer_tx_shutdown_message_unset(struct peer *);
1520
1521 extern int bgp_route_map_update_timer(struct thread *thread);
1522 extern void bgp_route_map_terminate(void);
1523
1524 extern int peer_cmp(struct peer *p1, struct peer *p2);
1525
1526 extern int bgp_map_afi_safi_iana2int(iana_afi_t pkt_afi, iana_safi_t pkt_safi,
1527                                      afi_t *afi, safi_t *safi);
1528 extern int bgp_map_afi_safi_int2iana(afi_t afi, safi_t safi,
1529                                      iana_afi_t *pkt_afi,
1530                                      iana_safi_t *pkt_safi);
1531
1532 extern struct peer_af *peer_af_create(struct peer *, afi_t, safi_t);
1533 extern struct peer_af *peer_af_find(struct peer *, afi_t, safi_t);
1534 extern int peer_af_delete(struct peer *, afi_t, safi_t);
1535
1536 extern void bgp_close(void);
1537 extern void bgp_free(struct bgp *);
1538
1539 static inline struct bgp *bgp_lock(struct bgp *bgp)
1540 {
1541         bgp->lock++;
1542         return bgp;
1543 }
1544
1545 static inline void bgp_unlock(struct bgp *bgp)
1546 {
1547         assert(bgp->lock > 0);
1548         if (--bgp->lock == 0)
1549                 bgp_free(bgp);
1550 }
1551
1552 static inline int afindex(afi_t afi, safi_t safi)
1553 {
1554         switch (afi) {
1555         case AFI_IP:
1556                 switch (safi) {
1557                 case SAFI_UNICAST:
1558                         return BGP_AF_IPV4_UNICAST;
1559                         break;
1560                 case SAFI_MULTICAST:
1561                         return BGP_AF_IPV4_MULTICAST;
1562                         break;
1563                 case SAFI_LABELED_UNICAST:
1564                         return BGP_AF_IPV4_LBL_UNICAST;
1565                         break;
1566                 case SAFI_MPLS_VPN:
1567                         return BGP_AF_IPV4_VPN;
1568                         break;
1569                 case SAFI_ENCAP:
1570                         return BGP_AF_IPV4_ENCAP;
1571                         break;
1572                 case SAFI_FLOWSPEC:
1573                         return BGP_AF_IPV4_FLOWSPEC;
1574                 default:
1575                         return BGP_AF_MAX;
1576                         break;
1577                 }
1578                 break;
1579         case AFI_IP6:
1580                 switch (safi) {
1581                 case SAFI_UNICAST:
1582                         return BGP_AF_IPV6_UNICAST;
1583                         break;
1584                 case SAFI_MULTICAST:
1585                         return BGP_AF_IPV6_MULTICAST;
1586                         break;
1587                 case SAFI_LABELED_UNICAST:
1588                         return BGP_AF_IPV6_LBL_UNICAST;
1589                         break;
1590                 case SAFI_MPLS_VPN:
1591                         return BGP_AF_IPV6_VPN;
1592                         break;
1593                 case SAFI_ENCAP:
1594                         return BGP_AF_IPV6_ENCAP;
1595                         break;
1596                 case SAFI_FLOWSPEC:
1597                         return BGP_AF_IPV6_FLOWSPEC;
1598                 default:
1599                         return BGP_AF_MAX;
1600                         break;
1601                 }
1602                 break;
1603         case AFI_L2VPN:
1604                 switch (safi) {
1605                 case SAFI_EVPN:
1606                         return BGP_AF_L2VPN_EVPN;
1607                         break;
1608                 default:
1609                         return BGP_AF_MAX;
1610                         break;
1611                 }
1612         default:
1613                 return BGP_AF_MAX;
1614                 break;
1615         }
1616 }
1617
1618 /* If the peer is not a peer-group but is bound to a peer-group return 1 */
1619 static inline int peer_group_active(struct peer *peer)
1620 {
1621         if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP) && peer->group)
1622                 return 1;
1623         return 0;
1624 }
1625
1626 /* If peer is negotiated at least one address family return 1. */
1627 static inline int peer_afi_active_nego(const struct peer *peer, afi_t afi)
1628 {
1629         if (peer->afc_nego[afi][SAFI_UNICAST]
1630             || peer->afc_nego[afi][SAFI_MULTICAST]
1631             || peer->afc_nego[afi][SAFI_LABELED_UNICAST]
1632             || peer->afc_nego[afi][SAFI_MPLS_VPN]
1633             || peer->afc_nego[afi][SAFI_ENCAP]
1634             || peer->afc_nego[afi][SAFI_FLOWSPEC]
1635             || peer->afc_nego[afi][SAFI_EVPN])
1636                 return 1;
1637         return 0;
1638 }
1639
1640 /* If at least one address family activated for group, return 1. */
1641 static inline int peer_group_af_configured(struct peer_group *group)
1642 {
1643         struct peer *peer = group->conf;
1644
1645         if (peer->afc[AFI_IP][SAFI_UNICAST] || peer->afc[AFI_IP][SAFI_MULTICAST]
1646             || peer->afc[AFI_IP][SAFI_LABELED_UNICAST]
1647             || peer->afc[AFI_IP][SAFI_FLOWSPEC]
1648             || peer->afc[AFI_IP][SAFI_MPLS_VPN] || peer->afc[AFI_IP][SAFI_ENCAP]
1649             || peer->afc[AFI_IP6][SAFI_UNICAST]
1650             || peer->afc[AFI_IP6][SAFI_MULTICAST]
1651             || peer->afc[AFI_IP6][SAFI_LABELED_UNICAST]
1652             || peer->afc[AFI_IP6][SAFI_MPLS_VPN]
1653             || peer->afc[AFI_IP6][SAFI_ENCAP]
1654             || peer->afc[AFI_IP6][SAFI_FLOWSPEC]
1655             || peer->afc[AFI_L2VPN][SAFI_EVPN])
1656                 return 1;
1657         return 0;
1658 }
1659
1660 static inline char *timestamp_string(time_t ts)
1661 {
1662         time_t tbuf;
1663         tbuf = time(NULL) - (bgp_clock() - ts);
1664         return ctime(&tbuf);
1665 }
1666
1667 static inline int peer_established(struct peer *peer)
1668 {
1669         if (peer->status == Established)
1670                 return 1;
1671         return 0;
1672 }
1673
1674 static inline int peer_dynamic_neighbor(struct peer *peer)
1675 {
1676         return (CHECK_FLAG(peer->flags, PEER_FLAG_DYNAMIC_NEIGHBOR)) ? 1 : 0;
1677 }
1678
1679 static inline int peer_cap_enhe(struct peer *peer, afi_t afi, safi_t safi)
1680 {
1681         return (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_NEGO));
1682 }
1683
1684 /* Lookup VRF for BGP instance based on its type. */
1685 static inline struct vrf *bgp_vrf_lookup_by_instance_type(struct bgp *bgp)
1686 {
1687         struct vrf *vrf;
1688
1689         if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
1690                 vrf = vrf_lookup_by_id(VRF_DEFAULT);
1691         else if (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
1692                 vrf = vrf_lookup_by_name(bgp->name);
1693         else
1694                 vrf = NULL;
1695
1696         return vrf;
1697 }
1698
1699 /* Link BGP instance to VRF. */
1700 static inline void bgp_vrf_link(struct bgp *bgp, struct vrf *vrf)
1701 {
1702         bgp->vrf_id = vrf->vrf_id;
1703         if (vrf->info != (void *)bgp)
1704                 vrf->info = (void *)bgp_lock(bgp);
1705 }
1706
1707 /* Unlink BGP instance from VRF. */
1708 static inline void bgp_vrf_unlink(struct bgp *bgp, struct vrf *vrf)
1709 {
1710         if (vrf->info == (void *)bgp) {
1711                 vrf->info = NULL;
1712                 bgp_unlock(bgp);
1713         }
1714         bgp->vrf_id = VRF_UNKNOWN;
1715 }
1716
1717 extern void bgp_update_redist_vrf_bitmaps(struct bgp *, vrf_id_t);
1718
1719 /* For benefit of rfapi */
1720 extern struct peer *peer_new(struct bgp *bgp);
1721
1722 #endif /* _QUAGGA_BGPD_H */