release/src/router/zebra/bgpd/bgpd.h

   1 /* BGP message definition header.
   2    Copyright (C) 1996, 97, 98, 99, 2000 Kunihiro Ishiguro
   3
   4 This file is part of GNU Zebra.
   5
   6 GNU Zebra is free software; you can redistribute it and/or modify it
   7 under the terms of the GNU General Public License as published by the
   8 Free Software Foundation; either version 2, or (at your option) any
   9 later version.
  10
  11 GNU Zebra is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Zebra; see the file COPYING.  If not, write to the Free
  18 Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  19 02111-1307, USA.  */
  20
  21 /* For union sockunion.  */
  22 #include "sockunion.h"
  23
  24 /* ZEBRA BGPd Version */
  25 #define ZEBRA_BGPD_VERSION "0.95 build 26"
  26
  27 /* Typedef BGP specific types.  */
  28 typedef u_int16_t as_t;
  29 typedef u_int16_t bgp_size_t;
  30
  31 /* BGP master for system wide configurations and variables.  */
  32 struct bgp_master
  33 {
  34   /* BGP instance list.  */
  35   struct list *bgp;
  36
  37   /* BGP thread master.  */
  38   struct thread_master *master;
  39
  40   /* BGP port number.  */
  41   u_int16_t port;
  42
  43   /* BGP start time.  */
  44   time_t start_time;
  45
  46   /* Various BGP global configuration.  */
  47   u_char options;
  48 #define BGP_OPT_NO_FIB                   (1 << 0)
  49 #define BGP_OPT_MULTIPLE_INSTANCE        (1 << 1)
  50 #define BGP_OPT_CONFIG_CISCO             (1 << 2)
  51
  52 #ifdef HAVE_TCP_SIGNATURE
  53   /* bgp receive socket */
  54   int sock;
  55 #endif /* HAVE_TCP_SIGNATURE */
  56 };
  57
  58 /* BGP instance structure.  */
  59 struct bgp
  60 {
  61   /* AS number of this BGP instance.  */
  62   as_t as;
  63
  64   /* Name of this BGP instance.  */
  65   char *name;
  66
  67   /* Self peer.  */
  68   struct peer *peer_self;
  69
  70   /* BGP peer. */
  71   struct list *peer;
  72
  73   /* BGP peer group.  */
  74   struct list *group;
  75
  76   /* BGP configuration.  */
  77   u_int16_t config;
  78 #define BGP_CONFIG_ROUTER_ID              (1 << 0)
  79 #define BGP_CONFIG_CLUSTER_ID             (1 << 1)
  80 #define BGP_CONFIG_CONFEDERATION          (1 << 2)
  81
  82   /* BGP router identifier.  */
  83   struct in_addr router_id;
  84
  85   /* BGP route reflector cluster ID.  */
  86   struct in_addr cluster_id;
  87
  88   /* BGP confederation information.  */
  89   as_t confed_id;
  90   as_t *confed_peers;
  91   int confed_peers_cnt;
  92
  93   /* BGP flags. */
  94   u_int16_t flags;
  95 #define BGP_FLAG_ALWAYS_COMPARE_MED       (1 << 0)
  96 #define BGP_FLAG_DETERMINISTIC_MED        (1 << 1)
  97 #define BGP_FLAG_MED_MISSING_AS_WORST     (1 << 2)
  98 #define BGP_FLAG_MED_CONFED               (1 << 3)
  99 #define BGP_FLAG_NO_DEFAULT_IPV4          (1 << 4)
 100 #define BGP_FLAG_NO_CLIENT_TO_CLIENT      (1 << 5)
 101 #define BGP_FLAG_NO_ENFORCE_FIRST_AS      (1 << 6)
 102 #define BGP_FLAG_COMPARE_ROUTER_ID        (1 << 7)
 103 #define BGP_FLAG_ASPATH_IGNORE            (1 << 8)
 104 #define BGP_FLAG_IMPORT_CHECK             (1 << 9)
 105 #define BGP_FLAG_NO_FAST_EXT_FAILOVER     (1 << 10)
 106 #define BGP_FLAG_LOG_NEIGHBOR_CHANGES     (1 << 11)
 107 #define BGP_FLAG_GRACEFUL_RESTART         (1 << 12)
 108 #define BGP_FLAG_COST_COMMUNITY_IGNORE    (1 << 13)
 109
 110   /* BGP Per AF flags */
 111   u_int16_t af_flags[AFI_MAX][SAFI_MAX];
 112 #define BGP_CONFIG_DAMPENING              (1 << 0)
 113
 114   /* Static route configuration.  */
 115   struct bgp_table *route[AFI_MAX][SAFI_MAX];
 116
 117   /* Aggregate address configuration.  */
 118   struct bgp_table *aggregate[AFI_MAX][SAFI_MAX];
 119
 120   /* BGP routing information base.  */
 121   struct bgp_table *rib[AFI_MAX][SAFI_MAX];
 122
 123   /* BGP redistribute configuration. */
 124   u_char redist[AFI_MAX][ZEBRA_ROUTE_MAX];
 125
 126   /* BGP redistribute metric configuration. */
 127   u_char redist_metric_flag[AFI_MAX][ZEBRA_ROUTE_MAX];
 128   u_int32_t redist_metric[AFI_MAX][ZEBRA_ROUTE_MAX];
 129
 130   /* BGP redistribute route-map.  */
 131   struct
 132   {
 133     char *name;
 134     struct route_map *map;
 135   } rmap[AFI_MAX][ZEBRA_ROUTE_MAX];
 136
 137   /* BGP distance configuration.  */
 138   u_char distance_ebgp;
 139   u_char distance_ibgp;
 140   u_char distance_local;
 141
 142   /* BGP default local-preference.  */
 143   u_int32_t default_local_pref;
 144
 145   /* BGP default timer.  */
 146   u_int32_t default_holdtime;
 147   u_int32_t default_keepalive;
 148
 149   /* BGP graceful restart */
 150   u_int32_t restart_time;
 151   u_int32_t stalepath_time;
 152 };
 153
 154 /* BGP peer-group support. */
 155 struct peer_group
 156 {
 157   /* Name of the peer-group. */
 158   char *name;
 159
 160   /* Pointer to BGP.  */
 161   struct bgp *bgp;
 162
 163   /* Peer-group client list. */
 164   struct list *peer;
 165
 166   /* Peer-group config */
 167   struct peer *conf;
 168 };
 169
 170 /* BGP Notify message format. */
 171 struct bgp_notify
 172 {
 173   u_char code;
 174   u_char subcode;
 175   char *data;
 176   bgp_size_t length;
 177 };
 178
 179 /* Next hop self address. */
 180 struct bgp_nexthop
 181 {
 182   struct interface *ifp;
 183   struct in_addr v4;
 184 #ifdef HAVE_IPV6
 185   struct in6_addr v6_global;
 186   struct in6_addr v6_local;
 187 #endif /* HAVE_IPV6 */
 188 };
 189
 190 /* BGP router distinguisher value.  */
 191 #define BGP_RD_SIZE                8
 192
 193 struct bgp_rd
 194 {
 195   u_char val[BGP_RD_SIZE];
 196 };
 197
 198 /* BGP filter structure. */
 199 struct bgp_filter
 200 {
 201   /* Distribute-list.  */
 202   struct
 203   {
 204     char *name;
 205     struct access_list *alist;
 206   } dlist[FILTER_MAX];
 207
 208   /* Prefix-list.  */
 209   struct
 210   {
 211     char *name;
 212     struct prefix_list *plist;
 213   } plist[FILTER_MAX];
 214
 215   /* Filter-list.  */
 216   struct
 217   {
 218     char *name;
 219     struct as_list *aslist;
 220   } aslist[FILTER_MAX];
 221
 222   /* Route-map.  */
 223   struct
 224   {
 225     char *name;
 226     struct route_map *map;
 227   } map[FILTER_MAX];
 228
 229   /* Unsuppress-map.  */
 230   struct
 231   {
 232     char *name;
 233     struct route_map *map;
 234   } usmap;
 235 };
 236
 237 /* BGP neighbor structure. */
 238 struct peer
 239 {
 240   /* BGP structure.  */
 241   struct bgp *bgp;
 242
 243   /* BGP peer group.  */
 244   struct peer_group *group;
 245
 246   /* Peer's remote AS number. */
 247   as_t as;
 248
 249   /* Peer's local AS number. */
 250   as_t local_as;
 251
 252   /* Peer's Change local AS number. */
 253   as_t change_local_as;
 254
 255   /* Remote router ID. */
 256   struct in_addr remote_id;
 257
 258   /* Local router ID. */
 259   struct in_addr local_id;
 260
 261   /* Packet receive and send buffer. */
 262   struct stream *ibuf;
 263   struct stream_fifo *obuf;
 264   struct stream *work;
 265
 266   /* Status of the peer. */
 267   int status;
 268   int ostatus;
 269
 270   /* Peer information */
 271   int fd;                       /* File descriptor */
 272   int ttl;                      /* TTL of TCP connection to the peer. */
 273   char *desc;                   /* Description of the peer. */
 274   unsigned short port;          /* Destination port for peer */
 275   char *host;                   /* Printable address of the peer. */
 276   union sockunion su;           /* Sockunion address of the peer. */
 277   time_t uptime;                /* Last Up/Down time */
 278   time_t readtime;              /* Last read time */
 279   time_t resettime;             /* Last reset time */
 280
 281   unsigned int ifindex;         /* ifindex of the BGP connection. */
 282   char *ifname;                 /* bind interface name. */
 283   char *update_if;
 284   union sockunion *update_source;
 285   struct zlog *log;
 286
 287   union sockunion *su_local;    /* Sockunion of local address.  */
 288   union sockunion *su_remote;   /* Sockunion of remote address.  */
 289   int shared_network;           /* Is this peer shared same network. */
 290   struct bgp_nexthop nexthop;   /* Nexthop */
 291
 292   /* Peer address family configuration. */
 293   u_char afc[AFI_MAX][SAFI_MAX];
 294   u_char afc_nego[AFI_MAX][SAFI_MAX];
 295   u_char afc_adv[AFI_MAX][SAFI_MAX];
 296   u_char afc_recv[AFI_MAX][SAFI_MAX];
 297
 298   /* Capability flags (reset in bgp_stop) */
 299   u_char cap;
 300 #define PEER_CAP_REFRESH_ADV                (1 << 0) /* refresh advertised */
 301 #define PEER_CAP_REFRESH_OLD_RCV            (1 << 1) /* refresh old received */
 302 #define PEER_CAP_REFRESH_NEW_RCV            (1 << 2) /* refresh rfc received */
 303 #define PEER_CAP_DYNAMIC_ADV                (1 << 3) /* dynamic advertised */
 304 #define PEER_CAP_DYNAMIC_RCV                (1 << 4) /* dynamic received */
 305 #define PEER_CAP_RESTART_ADV                (1 << 5) /* restart advertised */
 306 #define PEER_CAP_RESTART_RCV                (1 << 6) /* restart received */
 307
 308   /* Capability flags (reset in bgp_stop) */
 309   u_int16_t af_cap[AFI_MAX][SAFI_MAX];
 310 #define PEER_CAP_ORF_PREFIX_SM_ADV          (1 << 0) /* send-mode advertised */
 311 #define PEER_CAP_ORF_PREFIX_RM_ADV          (1 << 1) /* receive-mode advertised */
 312 #define PEER_CAP_ORF_PREFIX_SM_RCV          (1 << 2) /* send-mode received */
 313 #define PEER_CAP_ORF_PREFIX_RM_RCV          (1 << 3) /* receive-mode received */
 314 #define PEER_CAP_ORF_PREFIX_SM_OLD_RCV      (1 << 4) /* send-mode received */
 315 #define PEER_CAP_ORF_PREFIX_RM_OLD_RCV      (1 << 5) /* receive-mode received */
 316 #define PEER_CAP_RESTART_AF_RCV             (1 << 6) /* graceful restart afi/safi received */
 317 #define PEER_CAP_RESTART_AF_PRESERVE_RCV    (1 << 7) /* graceful restart afi/safi F-bit received */
 318
 319   /* Global configuration flags. */
 320   u_int32_t flags;
 321 #define PEER_FLAG_CONNECT_MODE_PASSIVE      (1 << 0) /* tranport connection-mode passive */
 322 #define PEER_FLAG_CONNECT_MODE_ACTIVE       (1 << 1) /* tranport connection-mode active */
 323 #define PEER_FLAG_SHUTDOWN                  (1 << 2) /* shutdown */
 324 #define PEER_FLAG_DONT_CAPABILITY           (1 << 3) /* dont-capability */
 325 #define PEER_FLAG_OVERRIDE_CAPABILITY       (1 << 4) /* override-capability */
 326 #define PEER_FLAG_STRICT_CAP_MATCH          (1 << 5) /* strict-match */
 327 #define PEER_FLAG_DYNAMIC_CAPABILITY        (1 << 6) /* dynamic capability */
 328 #define PEER_FLAG_DISABLE_CONNECTED_CHECK   (1 << 7) /* disable-connected-check */
 329 #define PEER_FLAG_LOCAL_AS_NO_PREPEND       (1 << 8) /* local-as no-prepend */
 330 #define PEER_FLAG_PASSWORD                  (1 << 9) /* password */
 331
 332   /* NSF mode (graceful restart) */
 333   u_char nsf[AFI_MAX][SAFI_MAX];
 334
 335   /* Per AF configuration flags. */
 336   u_int32_t af_flags[AFI_MAX][SAFI_MAX];
 337 #define PEER_FLAG_SEND_COMMUNITY            (1 << 0) /* send-community */
 338 #define PEER_FLAG_SEND_EXT_COMMUNITY        (1 << 1) /* send-community ext. */
 339 #define PEER_FLAG_NEXTHOP_SELF              (1 << 2) /* next-hop-self */
 340 #define PEER_FLAG_REFLECTOR_CLIENT          (1 << 3) /* reflector-client */
 341 #define PEER_FLAG_RSERVER_CLIENT            (1 << 4) /* route-server-client */
 342 #define PEER_FLAG_SOFT_RECONFIG             (1 << 5) /* soft-reconfiguration */
 343 #define PEER_FLAG_AS_PATH_UNCHANGED         (1 << 6) /* transparent-as */
 344 #define PEER_FLAG_NEXTHOP_UNCHANGED         (1 << 7) /* transparent-next-hop */
 345 #define PEER_FLAG_MED_UNCHANGED             (1 << 8) /* transparent-next-hop */
 346 #define PEER_FLAG_DEFAULT_ORIGINATE         (1 << 9) /* default-originate */
 347 #define PEER_FLAG_REMOVE_PRIVATE_AS         (1 << 10) /* remove-private-as */
 348 #define PEER_FLAG_ALLOWAS_IN                (1 << 11) /* set allowas-in */
 349 #define PEER_FLAG_ORF_PREFIX_SM             (1 << 12) /* orf capability send-mode */
 350 #define PEER_FLAG_ORF_PREFIX_RM             (1 << 13) /* orf capability receive-mode */
 351 #define PEER_FLAG_MAX_PREFIX                (1 << 14) /* maximum prefix */
 352 #define PEER_FLAG_MAX_PREFIX_WARNING        (1 << 15) /* maximum prefix warning-only */
 353
 354   /* address family configuration */
 355   u_int32_t af_config[AFI_MAX][SAFI_MAX];
 356 #define PEER_AF_CONFIG_WEIGHT               (1 << 0) /* Default weight. */
 357   u_int16_t weight[AFI_MAX][SAFI_MAX];
 358
 359   /* password for TCP signature */
 360   char *password;
 361
 362   /* default-originate route-map.  */
 363   struct
 364   {
 365     char *name;
 366     struct route_map *map;
 367   } default_rmap[AFI_MAX][SAFI_MAX];
 368
 369   /* Peer status flags. */
 370   u_int16_t sflags;
 371 #define PEER_STATUS_ACCEPT_PEER       (1 << 0) /* accept peer */
 372 #define PEER_STATUS_PREFIX_OVERFLOW   (1 << 1) /* prefix-overflow */
 373 #define PEER_STATUS_CAPABILITY_OPEN   (1 << 2) /* capability open send */
 374 #define PEER_STATUS_HAVE_ACCEPT       (1 << 3) /* accept peer's parent */
 375 #define PEER_STATUS_GROUP             (1 << 4) /* peer-group conf */
 376 #define PEER_STATUS_CREATE_INIT       (1 << 5) /* peer create init */
 377 #define PEER_STATUS_NSF_MODE          (1 << 6) /* NSF aware peer */
 378 #define PEER_STATUS_NSF_WAIT          (1 << 7) /* wait comeback peer */
 379
 380   /* Peer status af flags (reset in bgp_stop) */
 381   u_int16_t af_sflags[AFI_MAX][SAFI_MAX];
 382 #define PEER_STATUS_ORF_PREFIX_SEND   (1 << 0) /* prefix-list send peer */
 383 #define PEER_STATUS_ORF_WAIT_REFRESH  (1 << 1) /* wait refresh received peer */
 384 #define PEER_STATUS_DEFAULT_ORIGINATE (1 << 2) /* default-originate peer */
 385 #define PEER_STATUS_PREFIX_THRESHOLD  (1 << 3) /* exceed prefix-threshold */
 386 #define PEER_STATUS_PREFIX_LIMIT      (1 << 4) /* exceed prefix-limit */
 387 #define PEER_STATUS_EOR_SEND          (1 << 5) /* end-of-rib send to peer */
 388 #define PEER_STATUS_EOR_RECEIVED      (1 << 6) /* end-of-rib received from peer */
 389
 390   /* Default attribute value for the peer. */
 391   u_int32_t config;
 392 #define PEER_CONFIG_TIMER             (1 << 1) /* keepalive & holdtime */
 393 #define PEER_CONFIG_ROUTEADV          (1 << 2) /* route advertise */
 394   u_int32_t holdtime;
 395   u_int32_t keepalive;
 396   u_int32_t routeadv;
 397
 398   /* Timer values. */
 399   u_int32_t v_start;
 400   u_int32_t v_connect;
 401   u_int32_t v_holdtime;
 402   u_int32_t v_keepalive;
 403   u_int32_t v_asorig;
 404   u_int32_t v_routeadv;
 405   u_int32_t v_pmax_restart;
 406   u_int32_t v_active_delay;
 407   u_int32_t v_gr_restart;
 408
 409   /* Threads. */
 410   struct thread *t_read;
 411   struct thread *t_write;
 412   struct thread *t_start;
 413   struct thread *t_connect;
 414   struct thread *t_holdtime;
 415   struct thread *t_keepalive;
 416   struct thread *t_asorig;
 417   struct thread *t_routeadv[AFI_MAX][SAFI_MAX];
 418   struct thread *t_pmax_restart;
 419   struct thread *t_gr_restart;
 420   struct thread *t_gr_stale;
 421
 422   /* Statistics field */
 423   u_int32_t open_in;            /* Open message input count */
 424   u_int32_t open_out;           /* Open message output count */
 425   u_int32_t update_in;          /* Update message input count */
 426   u_int32_t update_out;         /* Update message ouput count */
 427   time_t update_time;           /* Update message received time. */
 428   u_int32_t keepalive_in;       /* Keepalive input count */
 429   u_int32_t keepalive_out;      /* Keepalive output count */
 430   u_int32_t notify_in;          /* Notify input count */
 431   u_int32_t notify_out;         /* Notify output count */
 432   u_int32_t refresh_in;         /* Route Refresh input count */
 433   u_int32_t refresh_out;        /* Route Refresh output count */
 434   u_int32_t dynamic_cap_in;     /* Dynamic Capability input count.  */
 435   u_int32_t dynamic_cap_out;    /* Dynamic Capability output count.  */
 436
 437   /* BGP state count */
 438   u_int32_t established;        /* Established */
 439   u_int32_t dropped;            /* Dropped */
 440
 441   /* Syncronization list and time.  */
 442   struct bgp_synchronize *sync[AFI_MAX][SAFI_MAX];
 443   time_t synctime[AFI_MAX][SAFI_MAX];
 444
 445   /* Send prefix count. */
 446   unsigned long scount[AFI_MAX][SAFI_MAX];
 447
 448   /* Announcement attribute hash.  */
 449   struct hash *hash[AFI_MAX][SAFI_MAX];
 450
 451   /* Notify data. */
 452   struct bgp_notify notify;
 453
 454   /* Whole packet size to be read. */
 455   unsigned long packet_size;
 456
 457   /* Filter structure. */
 458   struct bgp_filter filter[AFI_MAX][SAFI_MAX];
 459
 460   /* ORF Prefix-list */
 461   struct prefix_list *orf_plist[AFI_MAX][SAFI_MAX];
 462
 463   /* Prefix count. */
 464   unsigned long pcount[AFI_MAX][SAFI_MAX];
 465
 466   /* Max prefix count. */
 467   unsigned long pmax[AFI_MAX][SAFI_MAX];
 468   u_char pmax_threshold[AFI_MAX][SAFI_MAX];
 469   u_int16_t pmax_restart[AFI_MAX][SAFI_MAX];
 470 #define MAXIMUM_PREFIX_THRESHOLD_DEFAULT 75
 471
 472   /* allowas-in. */
 473   char allowas_in[AFI_MAX][SAFI_MAX];
 474
 475   /* peer reset cause */
 476   char last_reset;
 477 #define PEER_DOWN_RID_CHANGE             1 /* bgp router-id command */
 478 #define PEER_DOWN_REMOTE_AS_CHANGE       2 /* neighbor remote-as command */
 479 #define PEER_DOWN_LOCAL_AS_CHANGE        3 /* neighbor local-as command */
 480 #define PEER_DOWN_CLID_CHANGE            4 /* bgp cluster-id command */
 481 #define PEER_DOWN_CONFED_ID_CHANGE       5 /* bgp confederation identifier command */
 482 #define PEER_DOWN_CONFED_PEER_CHANGE     6 /* bgp confederation peer command */
 483 #define PEER_DOWN_RR_CLIENT_CHANGE       7 /* neighbor route-reflector-client command */
 484 #define PEER_DOWN_RS_CLIENT_CHANGE       8 /* neighbor route-server-client command */
 485 #define PEER_DOWN_UPDATE_SOURCE_CHANGE   9 /* neighbor update-source command */
 486 #define PEER_DOWN_AF_ACTIVATE           10 /* neighbor activate command */
 487 #define PEER_DOWN_USER_SHUTDOWN         11 /* neighbor shutdown command */
 488 #define PEER_DOWN_USER_RESET            12 /* clear ip bgp command */
 489 #define PEER_DOWN_NOTIFY_RECEIVED       13 /* notification received */
 490 #define PEER_DOWN_NOTIFY_SEND           14 /* notification send */
 491 #define PEER_DOWN_CLOSE_SESSION         15 /* tcp session close */
 492 #define PEER_DOWN_NEIGHBOR_DELETE       16 /* neghbor delete */
 493 #define PEER_DOWN_RMAP_BIND             17 /* neghbor peer-group command */
 494 #define PEER_DOWN_RMAP_UNBIND           18 /* no neighbor peer-group command */
 495 #define PEER_DOWN_CAPABILITY_CHANGE     19 /* neighbor capability command */
 496 #define PEER_DOWN_MULTIHOP_CHANGE       20 /* neighbor multihop command */
 497 #define PEER_DOWN_PASSWORD_CHANGE       21 /* neighbor password command */
 498 #define PEER_DOWN_NSF_CLOSE_SESSION     22 /* NSF tcp session close */
 499
 500   /* The kind of route-map Flags.*/
 501   u_char rmap_type;
 502 #define PEER_RMAP_TYPE_IN             (1 << 0) /* neighbor route-map in */
 503 #define PEER_RMAP_TYPE_OUT            (1 << 1) /* neighbor route-map out */
 504 #define PEER_RMAP_TYPE_NETWORK        (1 << 2) /* network route-map */
 505 #define PEER_RMAP_TYPE_REDISTRIBUTE   (1 << 3) /* redistribute route-map */
 506 #define PEER_RMAP_TYPE_DEFAULT        (1 << 4) /* default-originate route-map */
 507 #define PEER_RMAP_TYPE_NOSET          (1 << 5) /* not allow to set commands */
 508
 509 #ifdef HAVE_OPENBSD_TCP_SIGNATURE
 510   u_int32_t spi_in;
 511   u_int32_t spi_out;
 512 #endif /* HAVE_OPENBSD_TCP_SIGNATURE */
 513 };
 514
 515 /* This structure's member directly points incoming packet data
 516    stream. */
 517 struct bgp_nlri
 518 {
 519   /* AFI.  */
 520   afi_t afi;
 521
 522   /* SAFI.  */
 523   safi_t safi;
 524
 525   /* Pointer to NLRI byte stream.  */
 526   u_char *nlri;
 527
 528   /* Length of whole NLRI.  */
 529   bgp_size_t length;
 530 };
 531
 532 /* BGP versions.  */
 533 #define BGP_VERSION_4                            4
 534
 535 /* Default BGP port number.  */
 536 #define BGP_PORT_DEFAULT                       179
 537
 538 /* BGP message header and packet size.  */
 539 #define BGP_MARKER_SIZE                         16
 540 #define BGP_HEADER_SIZE                         19
 541 #define BGP_MAX_PACKET_SIZE                   4096
 542
 543 /* BGP minimum message size.  */
 544 #define BGP_MSG_OPEN_MIN_SIZE                   (BGP_HEADER_SIZE + 10)
 545 #define BGP_MSG_UPDATE_MIN_SIZE                 (BGP_HEADER_SIZE + 4)
 546 #define BGP_MSG_NOTIFY_MIN_SIZE                 (BGP_HEADER_SIZE + 2)
 547 #define BGP_MSG_KEEPALIVE_MIN_SIZE              (BGP_HEADER_SIZE + 0)
 548 #define BGP_MSG_ROUTE_REFRESH_MIN_SIZE          (BGP_HEADER_SIZE + 4)
 549 #define BGP_MSG_CAPABILITY_MIN_SIZE             (BGP_HEADER_SIZE + 3)
 550
 551 /* BGP message types.  */
 552 #define BGP_MSG_OPEN                             1
 553 #define BGP_MSG_UPDATE                           2
 554 #define BGP_MSG_NOTIFY                           3
 555 #define BGP_MSG_KEEPALIVE                        4
 556 #define BGP_MSG_ROUTE_REFRESH_NEW                5
 557 #define BGP_MSG_CAPABILITY                       6
 558 #define BGP_MSG_ROUTE_REFRESH_OLD              128
 559
 560 /* BGP open optional parameter.  */
 561 #define BGP_OPEN_OPT_AUTH                        1
 562 #define BGP_OPEN_OPT_CAP                         2
 563
 564 /* BGP4 attribute type codes.  */
 565 #define BGP_ATTR_ORIGIN                          1
 566 #define BGP_ATTR_AS_PATH                         2
 567 #define BGP_ATTR_NEXT_HOP                        3
 568 #define BGP_ATTR_MULTI_EXIT_DISC                 4
 569 #define BGP_ATTR_LOCAL_PREF                      5
 570 #define BGP_ATTR_ATOMIC_AGGREGATE                6
 571 #define BGP_ATTR_AGGREGATOR                      7
 572 #define BGP_ATTR_COMMUNITIES                     8
 573 #define BGP_ATTR_ORIGINATOR_ID                   9
 574 #define BGP_ATTR_CLUSTER_LIST                   10
 575 #define BGP_ATTR_DPA                            11
 576 #define BGP_ATTR_ADVERTISER                     12
 577 #define BGP_ATTR_RCID_PATH                      13
 578 #define BGP_ATTR_MP_REACH_NLRI                  14
 579 #define BGP_ATTR_MP_UNREACH_NLRI                15
 580 #define BGP_ATTR_EXT_COMMUNITIES                16
 581 #define BGP_ATTR_NEW_ASPATH                     17
 582 #define BGP_ATTR_NEW_AGGREGATOR                 18
 583
 584 /* BGP update origin.  */
 585 #define BGP_ORIGIN_IGP                           0
 586 #define BGP_ORIGIN_EGP                           1
 587 #define BGP_ORIGIN_INCOMPLETE                    2
 588
 589 /* BGP notify message codes.  */
 590 #define BGP_NOTIFY_HEADER_ERR                    1
 591 #define BGP_NOTIFY_OPEN_ERR                      2
 592 #define BGP_NOTIFY_UPDATE_ERR                    3
 593 #define BGP_NOTIFY_HOLD_ERR                      4
 594 #define BGP_NOTIFY_FSM_ERR                       5
 595 #define BGP_NOTIFY_CEASE                         6
 596 #define BGP_NOTIFY_CAPABILITY_ERR                7
 597 #define BGP_NOTIFY_MAX                           8
 598
 599 /* BGP_NOTIFY_HEADER_ERR sub codes.  */
 600 #define BGP_NOTIFY_HEADER_NOT_SYNC               1
 601 #define BGP_NOTIFY_HEADER_BAD_MESLEN             2
 602 #define BGP_NOTIFY_HEADER_BAD_MESTYPE            3
 603 #define BGP_NOTIFY_HEADER_MAX                    4
 604
 605 /* BGP_NOTIFY_OPEN_ERR sub codes.  */
 606 #define BGP_NOTIFY_OPEN_UNSUP_VERSION            1
 607 #define BGP_NOTIFY_OPEN_BAD_PEER_AS              2
 608 #define BGP_NOTIFY_OPEN_BAD_BGP_IDENT            3
 609 #define BGP_NOTIFY_OPEN_UNSUP_PARAM              4
 610 #define BGP_NOTIFY_OPEN_AUTH_FAILURE             5
 611 #define BGP_NOTIFY_OPEN_UNACEP_HOLDTIME          6
 612 #define BGP_NOTIFY_OPEN_UNSUP_CAPBL              7
 613 #define BGP_NOTIFY_OPEN_MAX                      8
 614
 615 /* BGP_NOTIFY_UPDATE_ERR sub codes.  */
 616 #define BGP_NOTIFY_UPDATE_MAL_ATTR               1
 617 #define BGP_NOTIFY_UPDATE_UNREC_ATTR             2
 618 #define BGP_NOTIFY_UPDATE_MISS_ATTR              3
 619 #define BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR          4
 620 #define BGP_NOTIFY_UPDATE_ATTR_LENG_ERR          5
 621 #define BGP_NOTIFY_UPDATE_INVAL_ORIGIN           6
 622 #define BGP_NOTIFY_UPDATE_AS_ROUTE_LOOP          7
 623 #define BGP_NOTIFY_UPDATE_INVAL_NEXT_HOP         8
 624 #define BGP_NOTIFY_UPDATE_OPT_ATTR_ERR           9
 625 #define BGP_NOTIFY_UPDATE_INVAL_NETWORK         10
 626 #define BGP_NOTIFY_UPDATE_MAL_AS_PATH           11
 627 #define BGP_NOTIFY_UPDATE_MAX                   12
 628
 629 /* BGP_NOTIFY_CEASE sub codes (draft-ietf-idr-cease-subcode-05).  */
 630 #define BGP_NOTIFY_CEASE_MAX_PREFIX              1
 631 #define BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN          2
 632 #define BGP_NOTIFY_CEASE_PEER_UNCONFIG           3
 633 #define BGP_NOTIFY_CEASE_ADMIN_RESET             4
 634 #define BGP_NOTIFY_CEASE_CONNECT_REJECT          5
 635 #define BGP_NOTIFY_CEASE_CONFIG_CHANGE           6
 636 #define BGP_NOTIFY_CEASE_CONNECT_COLLISION       7
 637 #define BGP_NOTIFY_CEASE_OUT_OF_RESOURCE         8
 638 #define BGP_NOTIFY_CEASE_MAX                     9
 639
 640 /* BGP_NOTIFY_CAPABILITY_ERR sub codes (draft-ietf-idr-dynamic-cap-02). */
 641 #define BGP_NOTIFY_CAPABILITY_INVALID_ACTION     1
 642 #define BGP_NOTIFY_CAPABILITY_INVALID_LENGTH     2
 643 #define BGP_NOTIFY_CAPABILITY_MALFORMED_CODE     3
 644 #define BGP_NOTIFY_CAPABILITY_MAX                4
 645
 646 /* BGP finite state machine status.  */
 647 #define Idle                                     1
 648 #define Connect                                  2
 649 #define Active                                   3
 650 #define OpenSent                                 4
 651 #define OpenConfirm                              5
 652 #define Established                              6
 653 #define BGP_STATUS_MAX                           7
 654
 655 /* BGP finite state machine events.  */
 656 #define BGP_Start                                1
 657 #define BGP_Stop                                 2
 658 #define TCP_connection_open                      3
 659 #define TCP_connection_closed                    4
 660 #define TCP_connection_open_failed               5
 661 #define TCP_fatal_error                          6
 662 #define ConnectRetry_timer_expired               7
 663 #define Hold_Timer_expired                       8
 664 #define KeepAlive_timer_expired                  9
 665 #define Receive_OPEN_message                    10
 666 #define Receive_KEEPALIVE_message               11
 667 #define Receive_UPDATE_message                  12
 668 #define Receive_NOTIFICATION_message            13
 669 #define BGP_EVENTS_MAX                          14
 670
 671 /* BGP timers default value.  */
 672 #define BGP_PEER_FIRST_CREATE_TIMER             20
 673 #define BGP_INIT_START_TIMER                     0
 674 #define BGP_ACTIVE_DELAY_TIMER                   5
 675 #define BGP_ERROR_START_TIMER                   30
 676 #define BGP_DEFAULT_HOLDTIME                   180
 677 #define BGP_DEFAULT_KEEPALIVE                   60
 678 #define BGP_DEFAULT_ASORIGINATE                 15
 679 #define BGP_DEFAULT_EBGP_ROUTEADV               30
 680 #define BGP_DEFAULT_IBGP_ROUTEADV                5
 681 #define BGP_CLEAR_CONNECT_RETRY                 20
 682 #define BGP_DEFAULT_CONNECT_RETRY              120
 683
 684 /* BGP default local preference.  */
 685 #define BGP_DEFAULT_LOCAL_PREF                 100
 686
 687 /* BGP graceful restart  */
 688 #define BGP_DEFAULT_RESTART_TIME               120
 689 #define BGP_DEFAULT_STALEPATH_TIME             360
 690
 691 /* SAFI which used in open capability negotiation.  */
 692 #define BGP_SAFI_VPNV4                         128
 693 #define BGP_SAFI_VPNV6                         129
 694
 695 /* Max TTL value.  */
 696 #define TTL_MAX                                255
 697
 698 /* BGP uptime string length.  */
 699 #define BGP_UPTIME_LEN 25
 700
 701 /* Default configuration settings for bgpd.  */
 702 #define BGP_VTY_PORT                          2605
 703 #define BGP_VTYSH_PATH                "/tmp/.bgpd"
 704 #define BGP_DEFAULT_CONFIG             "bgpd.conf"
 705
 706 /* Check AS path loop when we send NLRI.  */
 707 /* #define BGP_SEND_ASPATH_CHECK */
 708
 709 /* IBGP/EBGP identifier.  We also have a CONFED peer, which is to say,
 710    a peer who's AS is part of our Confederation.  */
 711 enum
 712 {
 713   BGP_PEER_IBGP,
 714   BGP_PEER_EBGP,
 715   BGP_PEER_INTERNAL,
 716   BGP_PEER_CONFED
 717 };
 718
 719 /* Flag for peer_clear_soft().  */
 720 enum bgp_clear_type
 721 {
 722   BGP_CLEAR_SOFT_NONE,
 723   BGP_CLEAR_SOFT_OUT,
 724   BGP_CLEAR_SOFT_IN,
 725   BGP_CLEAR_SOFT_BOTH,
 726   BGP_CLEAR_SOFT_IN_ORF_PREFIX
 727 };
 728
 729 /* Macros. */
 730 #define BGP_INPUT(P)         ((P)->ibuf)
 731 #define BGP_INPUT_PNT(P)     (STREAM_PNT(BGP_INPUT(P)))
 732
 733 /* Macro to check BGP information is alive or not.  */
 734 #define BGP_INFO_HOLDDOWN(BI)                         \
 735   (! CHECK_FLAG ((BI)->flags, BGP_INFO_VALID)         \
 736    || CHECK_FLAG ((BI)->flags, BGP_INFO_HISTORY)      \
 737    || CHECK_FLAG ((BI)->flags, BGP_INFO_DAMPED))
 738
 739 /* Count prefix size from mask length */
 740 #define PSIZE(a) (((a) + 7) / (8))
 741
 742 /* BGP error codes.  */
 743 #define BGP_SUCCESS                               0
 744 #define BGP_ERR_INVALID_VALUE                    -1
 745 #define BGP_ERR_INVALID_FLAG                     -2
 746 #define BGP_ERR_INVALID_AS                       -3
 747 #define BGP_ERR_INVALID_BGP                      -4
 748 #define BGP_ERR_PEER_GROUP_MEMBER                -5
 749 #define BGP_ERR_MULTIPLE_INSTANCE_USED           -6
 750 #define BGP_ERR_PEER_GROUP_MEMBER_EXISTS         -7
 751 #define BGP_ERR_PEER_BELONGS_TO_GROUP            -8
 752 #define BGP_ERR_PEER_GROUP_AF_UNCONFIGURED       -9
 753 #define BGP_ERR_PEER_GROUP_NO_REMOTE_AS         -10
 754 #define BGP_ERR_PEER_GROUP_CANT_CHANGE          -11
 755 #define BGP_ERR_PEER_GROUP_MISMATCH             -12
 756 #define BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT  -13
 757 #define BGP_ERR_MULTIPLE_INSTANCE_NOT_SET       -14
 758 #define BGP_ERR_AS_MISMATCH                     -15
 759 #define BGP_ERR_PEER_INACTIVE                   -16
 760 #define BGP_ERR_INVALID_FOR_PEER_GROUP_MEMBER   -17
 761 #define BGP_ERR_PEER_GROUP_HAS_THE_FLAG         -18
 762 #define BGP_ERR_PEER_FLAG_CONFLICT              -19
 763 #define BGP_ERR_PEER_GROUP_SHUTDOWN             -20
 764 #define BGP_ERR_PEER_FILTER_CONFLICT            -21
 765 #define BGP_ERR_NOT_INTERNAL_PEER               -22
 766 #define BGP_ERR_REMOVE_PRIVATE_AS               -23
 767 #define BGP_ERR_AF_UNCONFIGURED                 -24
 768 #define BGP_ERR_SOFT_RECONFIG_UNCONFIGURED      -25
 769 #define BGP_ERR_INSTANCE_MISMATCH               -26
 770 #define BGP_ERR_LOCAL_AS_ALLOWED_ONLY_FOR_EBGP  -27
 771 #define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS    -28
 772 #define BGP_ERR_MAX                             -29
 773
 774 extern struct bgp_master *bm;
 775
 776 extern struct thread_master *master;
 777
 778 /* Prototypes. */
 779 void bgp_terminate (void);
 780 void bgp_reset (void);
 781 void bgp_zclient_reset ();
 782 int bgp_nexthop_set (union sockunion *, union sockunion *,
 783                      struct bgp_nexthop *, struct peer *);
 784 struct bgp *bgp_get_default ();
 785 struct bgp *bgp_lookup (as_t, char *);
 786 struct bgp *bgp_lookup_by_name (char *);
 787 struct peer *peer_lookup (struct bgp *, union sockunion *);
 788 struct peer_group *peer_group_lookup (struct bgp *, char *);
 789 struct peer_group *peer_group_get (struct bgp *, char *);
 790 struct peer *peer_lookup_with_open (union sockunion *, as_t, struct in_addr *,
 791                                     int *);
 792 int peer_sort (struct peer *peer);
 793 int peer_active (struct peer *);
 794 int peer_active_nego (struct peer *);
 795 struct peer *peer_create_accept (struct bgp *);
 796 char *peer_uptime (time_t, char *, size_t);
 797 void bgp_config_write_family_header (struct vty *, afi_t, safi_t, int *);
 798 \f
 799 void bgp_master_init ();
 800
 801 void bgp_init ();
 802
 803 int bgp_option_set (int);
 804 int bgp_option_unset (int);
 805 int bgp_option_check (int);
 806
 807 int bgp_get (struct bgp **, as_t *, char *);
 808 int bgp_delete (struct bgp *);
 809
 810 int bgp_flag_set (struct bgp *, int);
 811 int bgp_flag_unset (struct bgp *, int);
 812 int bgp_flag_check (struct bgp *, int);
 813
 814 int bgp_router_id_set (struct bgp *, struct in_addr *);
 815 int bgp_router_id_unset (struct bgp *);
 816
 817 int bgp_cluster_id_set (struct bgp *, struct in_addr *);
 818 int bgp_cluster_id_unset (struct bgp *);
 819
 820 int bgp_confederation_id_set (struct bgp *, as_t);
 821 int bgp_confederation_id_unset (struct bgp *);
 822 int bgp_confederation_peers_check (struct bgp *, as_t);
 823
 824 int bgp_confederation_peers_add (struct bgp *, as_t);
 825 int bgp_confederation_peers_remove (struct bgp *, as_t);
 826
 827 int bgp_timers_set (struct bgp *, u_int32_t, u_int32_t);
 828 int bgp_timers_unset (struct bgp *);
 829
 830 int bgp_default_local_preference_set (struct bgp *, u_int32_t);
 831 int bgp_default_local_preference_unset (struct bgp *);
 832
 833 int peer_remote_as (struct bgp *, union sockunion *, as_t *, afi_t, safi_t);
 834 int peer_group_remote_as (struct bgp *, char *, as_t *);
 835 int peer_delete (struct peer *peer);
 836 int peer_group_delete (struct peer_group *);
 837 int peer_group_remote_as_delete (struct peer_group *);
 838
 839 int peer_activate (struct peer *, afi_t, safi_t);
 840 int peer_deactivate (struct peer *, afi_t, safi_t);
 841
 842 int peer_group_member (struct peer *);
 843 int peer_group_bind (struct bgp *, union sockunion *, struct peer_group *,
 844                      afi_t, safi_t, as_t *);
 845 int peer_group_unbind (struct bgp *, struct peer *, struct peer_group *,
 846                        afi_t, safi_t);
 847
 848 int peer_flag_set (struct peer *, u_int32_t);
 849 int peer_flag_unset (struct peer *, u_int32_t);
 850
 851 int peer_af_flag_set (struct peer *, afi_t, safi_t, u_int32_t);
 852 int peer_af_flag_unset (struct peer *, afi_t, safi_t, u_int32_t);
 853 int peer_af_flag_check (struct peer *, afi_t, safi_t, u_int32_t);
 854
 855 int peer_ebgp_multihop_set (struct peer *, int);
 856 int peer_ebgp_multihop_unset (struct peer *);
 857
 858 int peer_description_set (struct peer *, char *);
 859 int peer_description_unset (struct peer *);
 860
 861 int peer_update_source_if_set (struct peer *, char *);
 862 int peer_update_source_addr_set (struct peer *, union sockunion *);
 863 int peer_update_source_unset (struct peer *);
 864
 865 int peer_default_originate_set (struct peer *, afi_t, safi_t, char *);
 866 int peer_default_originate_unset (struct peer *, afi_t, safi_t);
 867
 868 int peer_port_set (struct peer *, u_int16_t);
 869 int peer_port_unset (struct peer *);
 870
 871 int peer_weight_set (struct peer *, u_int16_t, afi_t, safi_t);
 872 int peer_weight_unset (struct peer *, afi_t, safi_t);
 873
 874 int peer_timers_set (struct peer *, u_int32_t, u_int32_t);
 875 int peer_timers_unset (struct peer *);
 876
 877 int peer_advertise_interval_set (struct peer *, u_int32_t);
 878 int peer_advertise_interval_unset (struct peer *);
 879
 880 int peer_interface_set (struct peer *, char *);
 881 int peer_interface_unset (struct peer *);
 882
 883 int peer_distribute_set (struct peer *, afi_t, safi_t, int, char *);
 884 int peer_distribute_unset (struct peer *, afi_t, safi_t, int);
 885
 886 int peer_allowas_in_set (struct peer *, afi_t, safi_t, int);
 887 int peer_allowas_in_unset (struct peer *, afi_t, safi_t);
 888
 889 int peer_local_as_set (struct peer *, as_t, int);
 890 int peer_local_as_unset (struct peer *);
 891
 892 int peer_prefix_list_set (struct peer *, afi_t, safi_t, int, char *);
 893 int peer_prefix_list_unset (struct peer *, afi_t, safi_t, int);
 894
 895 int peer_aslist_set (struct peer *, afi_t, safi_t, int, char *);
 896 int peer_aslist_unset (struct peer *,afi_t, safi_t, int);
 897
 898 int peer_route_map_set (struct peer *, afi_t, safi_t, int, char *);
 899 int peer_route_map_unset (struct peer *, afi_t, safi_t, int);
 900
 901 int peer_unsuppress_map_set (struct peer *, afi_t, safi_t, char *);
 902 int peer_unsuppress_map_unset (struct peer *, afi_t, safi_t);
 903
 904 int peer_maximum_prefix_set (struct peer *, afi_t, safi_t, u_int32_t, u_char, int, u_int16_t);
 905 int peer_maximum_prefix_unset (struct peer *, afi_t, safi_t);
 906
 907 #ifdef HAVE_TCP_SIGNATURE
 908 int peer_password_set (struct peer *, char *);
 909 int peer_password_unset (struct peer *);
 910 #endif /* HAVE_TCP_SIGNATURE */
 911
 912 int peer_clear (struct peer *);
 913 int peer_clear_soft (struct peer *, afi_t, safi_t, enum bgp_clear_type);
 914
 915 void peer_nsf_stop (struct peer *);