bgpd/bgp_route.h

   1 /* BGP routing information base
   2  * Copyright (C) 1996, 97, 98, 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_BGP_ROUTE_H
  22 #define _QUAGGA_BGP_ROUTE_H
  23
  24 #include <stdbool.h>
  25
  26 #include "hook.h"
  27 #include "queue.h"
  28 #include "nexthop.h"
  29 #include "bgp_table.h"
  30 #include "bgp_addpath_types.h"
  31
  32 struct bgp_nexthop_cache;
  33 struct bgp_route_evpn;
  34
  35 enum bgp_show_type {
  36         bgp_show_type_normal,
  37         bgp_show_type_regexp,
  38         bgp_show_type_prefix_list,
  39         bgp_show_type_filter_list,
  40         bgp_show_type_route_map,
  41         bgp_show_type_neighbor,
  42         bgp_show_type_cidr_only,
  43         bgp_show_type_prefix_longer,
  44         bgp_show_type_community_all,
  45         bgp_show_type_community,
  46         bgp_show_type_community_exact,
  47         bgp_show_type_community_list,
  48         bgp_show_type_community_list_exact,
  49         bgp_show_type_lcommunity_all,
  50         bgp_show_type_lcommunity,
  51         bgp_show_type_lcommunity_exact,
  52         bgp_show_type_lcommunity_list,
  53         bgp_show_type_lcommunity_list_exact,
  54         bgp_show_type_flap_statistics,
  55         bgp_show_type_flap_neighbor,
  56         bgp_show_type_dampend_paths,
  57         bgp_show_type_damp_neighbor,
  58         bgp_show_type_detail,
  59 };
  60
  61 enum bgp_show_adj_route_type {
  62         bgp_show_adj_route_advertised,
  63         bgp_show_adj_route_received,
  64         bgp_show_adj_route_filtered,
  65 };
  66
  67
  68 #define BGP_SHOW_SCODE_HEADER                                                  \
  69         "Status codes:  s suppressed, d damped, "                              \
  70         "h history, * valid, > best, = multipath,\n"                           \
  71         "               i internal, r RIB-failure, S Stale, R Removed\n"
  72 #define BGP_SHOW_OCODE_HEADER "Origin codes:  i - IGP, e - EGP, ? - incomplete\n\n"
  73 #define BGP_SHOW_NCODE_HEADER "Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self\n"
  74 #define BGP_SHOW_HEADER "   Network          Next Hop            Metric LocPrf Weight Path\n"
  75
  76 /* Maximum number of labels we can process or send with a prefix. We
  77  * really do only 1 for MPLS (BGP-LU) but we can do 2 for EVPN-VxLAN.
  78  */
  79 #define BGP_MAX_LABELS 2
  80
  81 /* Error codes for handling NLRI */
  82 #define BGP_NLRI_PARSE_OK 0
  83 #define BGP_NLRI_PARSE_ERROR_PREFIX_OVERFLOW -1
  84 #define BGP_NLRI_PARSE_ERROR_PACKET_OVERFLOW -2
  85 #define BGP_NLRI_PARSE_ERROR_PREFIX_LENGTH -3
  86 #define BGP_NLRI_PARSE_ERROR_PACKET_LENGTH -4
  87 #define BGP_NLRI_PARSE_ERROR_LABEL_LENGTH -5
  88 #define BGP_NLRI_PARSE_ERROR_EVPN_MISSING_TYPE -6
  89 #define BGP_NLRI_PARSE_ERROR_EVPN_TYPE2_SIZE -7
  90 #define BGP_NLRI_PARSE_ERROR_EVPN_TYPE3_SIZE -8
  91 #define BGP_NLRI_PARSE_ERROR_EVPN_TYPE4_SIZE -9
  92 #define BGP_NLRI_PARSE_ERROR_EVPN_TYPE5_SIZE -10
  93 #define BGP_NLRI_PARSE_ERROR_FLOWSPEC_IPV6_NOT_SUPPORTED -11
  94 #define BGP_NLRI_PARSE_ERROR_FLOWSPEC_NLRI_SIZELIMIT -12
  95 #define BGP_NLRI_PARSE_ERROR_FLOWSPEC_BAD_FORMAT -13
  96 #define BGP_NLRI_PARSE_ERROR_ADDRESS_FAMILY -14
  97 #define BGP_NLRI_PARSE_ERROR -32
  98
  99 /* Ancillary information to struct bgp_path_info,
 100  * used for uncommonly used data (aggregation, MPLS, etc.)
 101  * and lazily allocated to save memory.
 102  */
 103 struct bgp_path_info_extra {
 104         /* Pointer to dampening structure.  */
 105         struct bgp_damp_info *damp_info;
 106
 107         /* This route is suppressed with aggregation.  */
 108         int suppress;
 109
 110         /* Nexthop reachability check.  */
 111         uint32_t igpmetric;
 112
 113         /* MPLS label(s) - VNI(s) for EVPN-VxLAN  */
 114         mpls_label_t label[BGP_MAX_LABELS];
 115         uint32_t num_labels;
 116
 117         /* af specific flags */
 118         uint16_t af_flags;
 119 #define BGP_EVPN_MACIP_TYPE_SVI_IP (1 << 0)
 120
 121 #if ENABLE_BGP_VNC
 122         union {
 123
 124                 struct {
 125                         void *rfapi_handle; /* export: NVE advertising this
 126                                                route */
 127                         struct list *local_nexthops; /* optional, for static
 128                                                         routes */
 129                 } export;
 130
 131                 struct {
 132                         struct thread *timer;
 133                         void *hme; /* encap monitor, if this is a VPN route */
 134                         struct prefix_rd
 135                                 rd; /* import: route's route-distinguisher */
 136                         uint8_t un_family; /* family of cached un address, 0 if
 137                                              unset */
 138                         union {
 139                                 struct in_addr addr4;
 140                                 struct in6_addr addr6;
 141                         } un; /* cached un address */
 142                         time_t create_time;
 143                         struct prefix aux_prefix; /* AFI_L2VPN: the IP addr,
 144                                                      if family set */
 145                 } import;
 146
 147         } vnc;
 148 #endif
 149
 150         /* For imported routes into a VNI (or VRF), this points to the parent.
 151          */
 152         void *parent;
 153
 154         /*
 155          * Some tunnelish parameters follow. Maybe consolidate into an
 156          * internal tunnel structure?
 157          */
 158
 159         /*
 160          * Original bgp instance for imported routes. Needed for:
 161          * 1. Find all routes from a specific vrf for deletion
 162          * 2. vrf context of original nexthop
 163          *
 164          * Store pointer to bgp instance rather than bgp->vrf_id because
 165          * bgp->vrf_id is not always valid (or may change?).
 166          *
 167          * Set to NULL if route is not imported from another bgp instance.
 168          */
 169         struct bgp *bgp_orig;
 170
 171         /*
 172          * Nexthop in context of original bgp instance. Needed
 173          * for label resolution of core mpls routes exported to a vrf.
 174          * Set nexthop_orig.family to 0 if not valid.
 175          */
 176         struct prefix nexthop_orig;
 177         /* presence of FS pbr firewall based entry */
 178         struct list *bgp_fs_pbr;
 179         /* presence of FS pbr iprule based entry */
 180         struct list *bgp_fs_iprule;
 181 };
 182
 183 struct bgp_path_info {
 184         /* For linked list. */
 185         struct bgp_path_info *next;
 186         struct bgp_path_info *prev;
 187
 188         /* For nexthop linked list */
 189         LIST_ENTRY(bgp_path_info) nh_thread;
 190
 191         /* Back pointer to the prefix node */
 192         struct bgp_node *net;
 193
 194         /* Back pointer to the nexthop structure */
 195         struct bgp_nexthop_cache *nexthop;
 196
 197         /* Peer structure.  */
 198         struct peer *peer;
 199
 200         /* Attribute structure.  */
 201         struct attr *attr;
 202
 203         /* Extra information */
 204         struct bgp_path_info_extra *extra;
 205
 206
 207         /* Multipath information */
 208         struct bgp_path_info_mpath *mpath;
 209
 210         /* Uptime.  */
 211         time_t uptime;
 212
 213         /* reference count */
 214         int lock;
 215
 216         /* BGP information status.  */
 217         uint16_t flags;
 218 #define BGP_PATH_IGP_CHANGED (1 << 0)
 219 #define BGP_PATH_DAMPED (1 << 1)
 220 #define BGP_PATH_HISTORY (1 << 2)
 221 #define BGP_PATH_SELECTED (1 << 3)
 222 #define BGP_PATH_VALID (1 << 4)
 223 #define BGP_PATH_ATTR_CHANGED (1 << 5)
 224 #define BGP_PATH_DMED_CHECK (1 << 6)
 225 #define BGP_PATH_DMED_SELECTED (1 << 7)
 226 #define BGP_PATH_STALE (1 << 8)
 227 #define BGP_PATH_REMOVED (1 << 9)
 228 #define BGP_PATH_COUNTED (1 << 10)
 229 #define BGP_PATH_MULTIPATH (1 << 11)
 230 #define BGP_PATH_MULTIPATH_CHG (1 << 12)
 231 #define BGP_PATH_RIB_ATTR_CHG (1 << 13)
 232 #define BGP_PATH_ANNC_NH_SELF (1 << 14)
 233
 234         /* BGP route type.  This can be static, RIP, OSPF, BGP etc.  */
 235         uint8_t type;
 236
 237         /* When above type is BGP.  This sub type specify BGP sub type
 238            information.  */
 239         uint8_t sub_type;
 240 #define BGP_ROUTE_NORMAL       0
 241 #define BGP_ROUTE_STATIC       1
 242 #define BGP_ROUTE_AGGREGATE    2
 243 #define BGP_ROUTE_REDISTRIBUTE 3
 244 #ifdef ENABLE_BGP_VNC
 245 # define BGP_ROUTE_RFP          4
 246 #endif
 247 #define BGP_ROUTE_IMPORTED     5        /* from another bgp instance/safi */
 248
 249         unsigned short instance;
 250
 251         /* Addpath identifiers */
 252         uint32_t addpath_rx_id;
 253         struct bgp_addpath_info_data tx_addpath;
 254 };
 255
 256 /* Structure used in BGP path selection */
 257 struct bgp_path_info_pair {
 258         struct bgp_path_info *old;
 259         struct bgp_path_info *new;
 260 };
 261
 262 /* BGP static route configuration. */
 263 struct bgp_static {
 264         /* Backdoor configuration.  */
 265         int backdoor;
 266
 267         /* Label index configuration; applies to LU prefixes. */
 268         uint32_t label_index;
 269 #define BGP_INVALID_LABEL_INDEX   0xFFFFFFFF
 270
 271         /* Import check status.  */
 272         uint8_t valid;
 273
 274         /* IGP metric. */
 275         uint32_t igpmetric;
 276
 277         /* IGP nexthop. */
 278         struct in_addr igpnexthop;
 279
 280         /* Atomic set reference count (ie cause of pathlimit) */
 281         uint32_t atomic;
 282
 283         /* BGP redistribute route-map.  */
 284         struct {
 285                 char *name;
 286                 struct route_map *map;
 287         } rmap;
 288
 289         /* Route Distinguisher */
 290         struct prefix_rd prd;
 291
 292         /* MPLS label.  */
 293         mpls_label_t label;
 294
 295         /* EVPN */
 296         struct eth_segment_id *eth_s_id;
 297         struct ethaddr *router_mac;
 298         uint16_t encap_tunneltype;
 299         struct prefix gatewayIp;
 300 };
 301
 302 /* Aggreagete address:
 303  *
 304  *  advertise-map  Set condition to advertise attribute
 305  *  as-set         Generate AS set path information
 306  *  attribute-map  Set attributes of aggregate
 307  *  route-map      Set parameters of aggregate
 308  *  summary-only   Filter more specific routes from updates
 309  *  suppress-map   Conditionally filter more specific routes from updates
 310  *  <cr>
 311  */
 312 struct bgp_aggregate {
 313         /* Summary-only flag. */
 314         uint8_t summary_only;
 315
 316         /* AS set generation. */
 317         uint8_t as_set;
 318
 319         /* Route-map for aggregated route. */
 320         struct {
 321                 char *name;
 322                 struct route_map *map;
 323         } rmap;
 324
 325         /* Suppress-count. */
 326         unsigned long count;
 327
 328         /* Count of routes of origin type incomplete under this aggregate. */
 329         unsigned long incomplete_origin_count;
 330
 331         /* Count of routes of origin type egp under this aggregate. */
 332         unsigned long egp_origin_count;
 333
 334         /* Hash containing the communities of all the
 335          * routes under this aggregate.
 336          */
 337         struct hash *community_hash;
 338
 339         /* Hash containing the extended communities of all the
 340          * routes under this aggregate.
 341          */
 342         struct hash *ecommunity_hash;
 343
 344         /* Hash containing the large communities of all the
 345          * routes under this aggregate.
 346          */
 347         struct hash *lcommunity_hash;
 348
 349         /* Hash containing the AS-Path of all the
 350          * routes under this aggregate.
 351          */
 352         struct hash *aspath_hash;
 353
 354         /* Aggregate route's community. */
 355         struct community *community;
 356
 357         /* Aggregate route's extended community. */
 358         struct ecommunity *ecommunity;
 359
 360         /* Aggregate route's large community. */
 361         struct lcommunity *lcommunity;
 362
 363         /* Aggregate route's as-path. */
 364         struct aspath *aspath;
 365
 366         /* SAFI configuration. */
 367         safi_t safi;
 368 };
 369
 370 #define BGP_NEXTHOP_AFI_FROM_NHLEN(nhlen)                                      \
 371         ((nhlen) < IPV4_MAX_BYTELEN                                            \
 372                  ? 0                                                           \
 373                  : ((nhlen) < IPV6_MAX_BYTELEN ? AFI_IP : AFI_IP6))
 374
 375 #define BGP_ATTR_NEXTHOP_AFI_IP6(attr)                                         \
 376         (!CHECK_FLAG(attr->flag, ATTR_FLAG_BIT(BGP_ATTR_NEXT_HOP))             \
 377          && ((attr)->mp_nexthop_len == BGP_ATTR_NHLEN_IPV6_GLOBAL              \
 378              || (attr)->mp_nexthop_len == BGP_ATTR_NHLEN_IPV6_GLOBAL_AND_LL    \
 379              || (attr)->mp_nexthop_len == BGP_ATTR_NHLEN_VPNV6_GLOBAL          \
 380              || (attr)->mp_nexthop_len == BGP_ATTR_NHLEN_VPNV6_GLOBAL_AND_LL))
 381 #define BGP_PATH_COUNTABLE(BI)                                                 \
 382         (!CHECK_FLAG((BI)->flags, BGP_PATH_HISTORY)                            \
 383          && !CHECK_FLAG((BI)->flags, BGP_PATH_REMOVED))
 384
 385 /* Flags which indicate a route is unuseable in some form */
 386 #define BGP_PATH_UNUSEABLE                                                     \
 387         (BGP_PATH_HISTORY | BGP_PATH_DAMPED | BGP_PATH_REMOVED)
 388 /* Macro to check BGP information is alive or not.  Sadly,
 389  * not equivalent to just checking previous, because of the
 390  * sense of the additional VALID flag.
 391  */
 392 #define BGP_PATH_HOLDDOWN(BI)                                                  \
 393         (!CHECK_FLAG((BI)->flags, BGP_PATH_VALID)                              \
 394          || CHECK_FLAG((BI)->flags, BGP_PATH_UNUSEABLE))
 395
 396 #define DISTRIBUTE_IN_NAME(F)   ((F)->dlist[FILTER_IN].name)
 397 #define DISTRIBUTE_IN(F)        ((F)->dlist[FILTER_IN].alist)
 398 #define DISTRIBUTE_OUT_NAME(F)  ((F)->dlist[FILTER_OUT].name)
 399 #define DISTRIBUTE_OUT(F)       ((F)->dlist[FILTER_OUT].alist)
 400
 401 #define PREFIX_LIST_IN_NAME(F)  ((F)->plist[FILTER_IN].name)
 402 #define PREFIX_LIST_IN(F)       ((F)->plist[FILTER_IN].plist)
 403 #define PREFIX_LIST_OUT_NAME(F) ((F)->plist[FILTER_OUT].name)
 404 #define PREFIX_LIST_OUT(F)      ((F)->plist[FILTER_OUT].plist)
 405
 406 #define FILTER_LIST_IN_NAME(F)  ((F)->aslist[FILTER_IN].name)
 407 #define FILTER_LIST_IN(F)       ((F)->aslist[FILTER_IN].aslist)
 408 #define FILTER_LIST_OUT_NAME(F) ((F)->aslist[FILTER_OUT].name)
 409 #define FILTER_LIST_OUT(F)      ((F)->aslist[FILTER_OUT].aslist)
 410
 411 #define ROUTE_MAP_IN_NAME(F)    ((F)->map[RMAP_IN].name)
 412 #define ROUTE_MAP_IN(F)         ((F)->map[RMAP_IN].map)
 413 #define ROUTE_MAP_OUT_NAME(F)   ((F)->map[RMAP_OUT].name)
 414 #define ROUTE_MAP_OUT(F)        ((F)->map[RMAP_OUT].map)
 415
 416 #define UNSUPPRESS_MAP_NAME(F)  ((F)->usmap.name)
 417 #define UNSUPPRESS_MAP(F)       ((F)->usmap.map)
 418
 419 /* path PREFIX (addpath rxid NUMBER) */
 420 #define PATH_ADDPATH_STR_BUFFER PREFIX2STR_BUFFER + 32
 421
 422 enum bgp_path_type {
 423         BGP_PATH_SHOW_ALL,
 424         BGP_PATH_SHOW_BESTPATH,
 425         BGP_PATH_SHOW_MULTIPATH
 426 };
 427
 428 static inline void bgp_bump_version(struct bgp_node *node)
 429 {
 430         node->version = bgp_table_next_version(bgp_node_table(node));
 431 }
 432
 433 static inline int bgp_fibupd_safi(safi_t safi)
 434 {
 435         if (safi == SAFI_UNICAST || safi == SAFI_MULTICAST
 436             || safi == SAFI_LABELED_UNICAST
 437             || safi == SAFI_FLOWSPEC)
 438                 return 1;
 439         return 0;
 440 }
 441
 442 /* Flag if the route path's family matches params. */
 443 static inline bool is_pi_family_matching(struct bgp_path_info *pi,
 444                                          afi_t afi, safi_t safi)
 445 {
 446         struct bgp_table *table;
 447         struct bgp_node *rn;
 448
 449         rn = pi->net;
 450         if (!rn)
 451                 return false;
 452         table = bgp_node_table(rn);
 453         if (table &&
 454             table->afi == afi &&
 455             table->safi == safi)
 456                 return true;
 457         return false;
 458 }
 459
 460 /* called before bgp_process() */
 461 DECLARE_HOOK(bgp_process,
 462                 (struct bgp *bgp, afi_t afi, safi_t safi,
 463                         struct bgp_node *bn, struct peer *peer, bool withdraw),
 464                 (bgp, afi, safi, bn, peer, withdraw))
 465
 466 /* Prototypes. */
 467 extern void bgp_rib_remove(struct bgp_node *rn, struct bgp_path_info *pi,
 468                            struct peer *peer, afi_t afi, safi_t safi);
 469 extern void bgp_process_queue_init(void);
 470 extern void bgp_route_init(void);
 471 extern void bgp_route_finish(void);
 472 extern void bgp_cleanup_routes(struct bgp *);
 473 extern void bgp_announce_route(struct peer *, afi_t, safi_t);
 474 extern void bgp_stop_announce_route_timer(struct peer_af *paf);
 475 extern void bgp_announce_route_all(struct peer *);
 476 extern void bgp_default_originate(struct peer *, afi_t, safi_t, int);
 477 extern void bgp_soft_reconfig_in(struct peer *, afi_t, safi_t);
 478 extern void bgp_clear_route(struct peer *, afi_t, safi_t);
 479 extern void bgp_clear_route_all(struct peer *);
 480 extern void bgp_clear_adj_in(struct peer *, afi_t, safi_t);
 481 extern void bgp_clear_stale_route(struct peer *, afi_t, safi_t);
 482 extern int bgp_outbound_policy_exists(struct peer *, struct bgp_filter *);
 483 extern int bgp_inbound_policy_exists(struct peer *, struct bgp_filter *);
 484
 485 extern struct bgp_node *bgp_afi_node_get(struct bgp_table *table, afi_t afi,
 486                                          safi_t safi, struct prefix *p,
 487                                          struct prefix_rd *prd);
 488 extern struct bgp_path_info *bgp_path_info_lock(struct bgp_path_info *path);
 489 extern struct bgp_path_info *bgp_path_info_unlock(struct bgp_path_info *path);
 490 extern void bgp_path_info_add(struct bgp_node *rn, struct bgp_path_info *pi);
 491 extern void bgp_path_info_extra_free(struct bgp_path_info_extra **extra);
 492 extern void bgp_path_info_reap(struct bgp_node *rn, struct bgp_path_info *pi);
 493 extern void bgp_path_info_delete(struct bgp_node *rn, struct bgp_path_info *pi);
 494 extern struct bgp_path_info_extra *
 495 bgp_path_info_extra_get(struct bgp_path_info *path);
 496 extern void bgp_path_info_set_flag(struct bgp_node *rn,
 497                                    struct bgp_path_info *path, uint32_t flag);
 498 extern void bgp_path_info_unset_flag(struct bgp_node *rn,
 499                                      struct bgp_path_info *path, uint32_t flag);
 500 extern void bgp_path_info_path_with_addpath_rx_str(struct bgp_path_info *pi,
 501                                                    char *buf);
 502
 503 extern int bgp_nlri_parse_ip(struct peer *, struct attr *, struct bgp_nlri *);
 504
 505 extern int bgp_maximum_prefix_overflow(struct peer *, afi_t, safi_t, int);
 506
 507 extern void bgp_redistribute_add(struct bgp *bgp, struct prefix *p,
 508                                  const union g_addr *nexthop, ifindex_t ifindex,
 509                                  enum nexthop_types_t nhtype, uint32_t metric,
 510                                  uint8_t type, unsigned short instance,
 511                                  route_tag_t tag);
 512 extern void bgp_redistribute_delete(struct bgp *, struct prefix *, uint8_t,
 513                                     unsigned short);
 514 extern void bgp_redistribute_withdraw(struct bgp *, afi_t, int, unsigned short);
 515
 516 extern void bgp_static_add(struct bgp *);
 517 extern void bgp_static_delete(struct bgp *);
 518 extern void bgp_static_redo_import_check(struct bgp *);
 519 extern void bgp_purge_static_redist_routes(struct bgp *bgp);
 520 extern void bgp_static_update(struct bgp *, struct prefix *,
 521                               struct bgp_static *, afi_t, safi_t);
 522 extern void bgp_static_withdraw(struct bgp *, struct prefix *, afi_t, safi_t);
 523
 524 extern int bgp_static_set_safi(afi_t afi, safi_t safi, struct vty *vty,
 525                                const char *, const char *, const char *,
 526                                const char *, int, const char *, const char *,
 527                                const char *, const char *);
 528
 529 extern int bgp_static_unset_safi(afi_t afi, safi_t safi, struct vty *,
 530                                  const char *, const char *, const char *, int,
 531                                  const char *, const char *, const char *);
 532
 533 /* this is primarily for MPLS-VPN */
 534 extern int bgp_update(struct peer *, struct prefix *, uint32_t, struct attr *,
 535                       afi_t, safi_t, int, int, struct prefix_rd *,
 536                       mpls_label_t *, uint32_t, int, struct bgp_route_evpn *);
 537 extern int bgp_withdraw(struct peer *, struct prefix *, uint32_t, struct attr *,
 538                         afi_t, safi_t, int, int, struct prefix_rd *,
 539                         mpls_label_t *, uint32_t, struct bgp_route_evpn *);
 540
 541 /* for bgp_nexthop and bgp_damp */
 542 extern void bgp_process(struct bgp *, struct bgp_node *, afi_t, safi_t);
 543
 544 /*
 545  * Add an end-of-initial-update marker to the process queue. This is just a
 546  * queue element with NULL bgp node.
 547  */
 548 extern void bgp_add_eoiu_mark(struct bgp *);
 549 extern void bgp_config_write_table_map(struct vty *, struct bgp *, afi_t,
 550                                        safi_t);
 551 extern void bgp_config_write_network(struct vty *, struct bgp *, afi_t, safi_t);
 552 extern void bgp_config_write_distance(struct vty *, struct bgp *, afi_t,
 553                                       safi_t);
 554
 555 extern void bgp_aggregate_delete(struct bgp *bgp, struct prefix *p, afi_t afi,
 556                                  safi_t safi, struct bgp_aggregate *aggregate);
 557 extern void bgp_aggregate_route(struct bgp *bgp, struct prefix *p, afi_t afi,
 558                                 safi_t safi, struct bgp_aggregate *aggregate);
 559 extern void bgp_aggregate_increment(struct bgp *bgp, struct prefix *p,
 560                                     struct bgp_path_info *path, afi_t afi,
 561                                     safi_t safi);
 562 extern void bgp_aggregate_decrement(struct bgp *bgp, struct prefix *p,
 563                                     struct bgp_path_info *path, afi_t afi,
 564                                     safi_t safi);
 565
 566 extern uint8_t bgp_distance_apply(struct prefix *p, struct bgp_path_info *path,
 567                                   afi_t afi, safi_t safi, struct bgp *bgp);
 568
 569 extern afi_t bgp_node_afi(struct vty *);
 570 extern safi_t bgp_node_safi(struct vty *);
 571
 572 extern struct bgp_path_info *info_make(int type, int sub_type,
 573                                        unsigned short instance,
 574                                        struct peer *peer, struct attr *attr,
 575                                        struct bgp_node *rn);
 576
 577 extern void route_vty_out(struct vty *vty, struct prefix *p,
 578                           struct bgp_path_info *path, int display, safi_t safi,
 579                           json_object *json_paths);
 580 extern void route_vty_out_tag(struct vty *vty, struct prefix *p,
 581                               struct bgp_path_info *path, int display,
 582                               safi_t safi, json_object *json);
 583 extern void route_vty_out_tmp(struct vty *vty, struct prefix *p,
 584                               struct attr *attr, safi_t safi, bool use_json,
 585                               json_object *json_ar);
 586 extern void route_vty_out_overlay(struct vty *vty, struct prefix *p,
 587                                   struct bgp_path_info *path, int display,
 588                                   json_object *json);
 589
 590 extern int subgroup_process_announce_selected(struct update_subgroup *subgrp,
 591                                               struct bgp_path_info *selected,
 592                                               struct bgp_node *rn,
 593                                               uint32_t addpath_tx_id);
 594
 595 extern int subgroup_announce_check(struct bgp_node *rn,
 596                                    struct bgp_path_info *pi,
 597                                    struct update_subgroup *subgrp,
 598                                    struct prefix *p, struct attr *attr);
 599
 600 extern void bgp_peer_clear_node_queue_drain_immediate(struct peer *peer);
 601 extern void bgp_process_queues_drain_immediate(void);
 602
 603 /* for encap/vpn */
 604 extern struct bgp_node *bgp_afi_node_lookup(struct bgp_table *table, afi_t afi,
 605                                             safi_t safi, struct prefix *p,
 606                                             struct prefix_rd *prd);
 607 extern void bgp_path_info_restore(struct bgp_node *rn,
 608                                   struct bgp_path_info *path);
 609
 610 extern int bgp_path_info_cmp_compatible(struct bgp *bgp,
 611                                         struct bgp_path_info *new,
 612                                         struct bgp_path_info *exist,
 613                                         char *pfx_buf, afi_t afi, safi_t safi,
 614                                         enum bgp_path_selection_reason *reason);
 615 extern void bgp_attr_add_gshut_community(struct attr *attr);
 616
 617 extern void bgp_best_selection(struct bgp *bgp, struct bgp_node *rn,
 618                                struct bgp_maxpaths_cfg *mpath_cfg,
 619                                struct bgp_path_info_pair *result, afi_t afi,
 620                                safi_t safi);
 621 extern void bgp_zebra_clear_route_change_flags(struct bgp_node *rn);
 622 extern int bgp_zebra_has_route_changed(struct bgp_node *rn,
 623                                        struct bgp_path_info *selected);
 624
 625 extern void route_vty_out_detail_header(struct vty *vty, struct bgp *bgp,
 626                                         struct bgp_node *rn,
 627                                         struct prefix_rd *prd, afi_t afi,
 628                                         safi_t safi, json_object *json);
 629 extern void route_vty_out_detail(struct vty *vty, struct bgp *bgp,
 630                                  struct bgp_node *bn,
 631                                  struct bgp_path_info *path,
 632                                  afi_t afi, safi_t safi,
 633                                  json_object *json_paths);
 634 extern int bgp_show_table_rd(struct vty *vty, struct bgp *bgp, safi_t safi,
 635                              struct bgp_table *table, struct prefix_rd *prd,
 636                              enum bgp_show_type type, void *output_arg,
 637                              bool use_json);
 638 #endif /* _QUAGGA_BGP_ROUTE_H */