ospfd/ospfd.h

   1 /*
   2  * OSPFd main header.
   3  * Copyright (C) 1998, 99, 2000 Kunihiro Ishiguro, Toshiaki Takada
   4  *
   5  * This file is part of GNU Zebra.
   6  *
   7  * GNU Zebra is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the
   9  * Free Software Foundation; either version 2, or (at your option) any
  10  * later version.
  11  *
  12  * GNU Zebra is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; see the file COPYING; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #ifndef _ZEBRA_OSPFD_H
  23 #define _ZEBRA_OSPFD_H
  24
  25 #include <zebra.h>
  26 #include "qobj.h"
  27 #include "libospf.h"
  28
  29 #include "filter.h"
  30 #include "log.h"
  31
  32 #include "ospf_memory.h"
  33 #include "ospf_dump_api.h"
  34
  35 #define OSPF_VERSION            2
  36
  37 /* VTY port number. */
  38 #define OSPF_VTY_PORT          2604
  39
  40 /* IP TTL for OSPF protocol. */
  41 #define OSPF_IP_TTL             1
  42 #define OSPF_VL_IP_TTL          100
  43
  44 /* Default configuration file name for ospfd. */
  45 #define OSPF_DEFAULT_CONFIG   "ospfd.conf"
  46
  47 #define OSPF_NSSA_TRANS_STABLE_DEFAULT          40
  48
  49 #define OSPF_ALLSPFROUTERS              0xe0000005      /* 224.0.0.5 */
  50 #define OSPF_ALLDROUTERS                0xe0000006      /* 224.0.0.6 */
  51
  52
  53 /* OSPF Authentication Type. */
  54 #define OSPF_AUTH_NULL                      0
  55 #define OSPF_AUTH_SIMPLE                    1
  56 #define OSPF_AUTH_CRYPTOGRAPHIC             2
  57 /* For Interface authentication setting default */
  58 #define OSPF_AUTH_NOTSET                   -1
  59 /* For the consumption and sanity of the command handler */
  60 /* DO NIOT REMOVE!!! Need to detect whether a value has
  61    been given or not in VLink command handlers */
  62 #define OSPF_AUTH_CMD_NOTSEEN              -2
  63
  64 /* OSPF options. */
  65 #define OSPF_OPTION_MT                   0x01  /* M/T */
  66 #define OSPF_OPTION_E                    0x02
  67 #define OSPF_OPTION_MC                   0x04
  68 #define OSPF_OPTION_NP                   0x08
  69 #define OSPF_OPTION_EA                   0x10
  70 #define OSPF_OPTION_DC                   0x20
  71 #define OSPF_OPTION_O                    0x40
  72 #define OSPF_OPTION_DN                   0x80
  73
  74 /* OSPF Database Description flags. */
  75 #define OSPF_DD_FLAG_MS                  0x01
  76 #define OSPF_DD_FLAG_M                   0x02
  77 #define OSPF_DD_FLAG_I                   0x04
  78 #define OSPF_DD_FLAG_ALL                 0x07
  79
  80 #define OSPF_LS_REFRESH_SHIFT       (60 * 15)
  81 #define OSPF_LS_REFRESH_JITTER      60
  82
  83 struct ospf_external
  84 {
  85   u_short instance;
  86   struct route_table *external_info;
  87 };
  88
  89 /* OSPF master for system wide configuration and variables. */
  90 struct ospf_master
  91 {
  92   /* OSPF instance. */
  93   struct list *ospf;
  94
  95   /* OSPF thread master. */
  96   struct thread_master *master;
  97
  98   /* Zebra interface list. */
  99   struct list *iflist;
 100
 101   /* Redistributed external information. */
 102   struct list *external[ZEBRA_ROUTE_MAX + 1];
 103 #define EXTERNAL_INFO(E)      (E->external_info)
 104
 105   /* Various OSPF global configuration. */
 106   u_char options;
 107 #define OSPF_MASTER_SHUTDOWN (1 << 0) /* deferred-shutdown */
 108 };
 109
 110 struct ospf_redist
 111 {
 112   u_short instance;
 113
 114   /* Redistribute metric info. */
 115   struct
 116   {
 117     int type;                   /* External metric type (E1 or E2).  */
 118     int value;                  /* Value for static metric (24-bit).
 119                                    -1 means metric value is not set. */
 120   } dmetric;
 121
 122   /* For redistribute route map. */
 123   struct
 124   {
 125     char *name;
 126     struct route_map *map;
 127   } route_map; /* +1 is for default-information */
 128 #define ROUTEMAP_NAME(R)   (R->route_map.name)
 129 #define ROUTEMAP(R)        (R->route_map.map)
 130 };
 131
 132 /* OSPF instance structure. */
 133 struct ospf
 134 {
 135   /* OSPF's running state based on the '[no] router ospf [<instance>]' config. */
 136   u_char  oi_running;
 137
 138   /* OSPF instance ID  */
 139   u_short instance;
 140
 141   /* OSPF Router ID. */
 142   struct in_addr router_id;             /* Configured automatically. */
 143   struct in_addr router_id_static;      /* Configured manually. */
 144
 145   /* ABR/ASBR internal flags. */
 146   u_char flags;
 147 #define OSPF_FLAG_ABR           0x0001
 148 #define OSPF_FLAG_ASBR          0x0002
 149
 150   /* ABR type. */
 151   u_char abr_type;
 152 #define OSPF_ABR_UNKNOWN        0
 153 #define OSPF_ABR_STAND          1
 154 #define OSPF_ABR_IBM            2
 155 #define OSPF_ABR_CISCO          3
 156 #define OSPF_ABR_SHORTCUT       4
 157 #define OSPF_ABR_DEFAULT        OSPF_ABR_CISCO
 158
 159   /* NSSA ABR */
 160   u_char anyNSSA;               /* Bump for every NSSA attached. */
 161
 162   /* Configured variables. */
 163   u_char config;
 164 #define OSPF_RFC1583_COMPATIBLE         (1 << 0)
 165 #define OSPF_OPAQUE_CAPABLE             (1 << 2)
 166 #define OSPF_LOG_ADJACENCY_CHANGES      (1 << 3)
 167 #define OSPF_LOG_ADJACENCY_DETAIL       (1 << 4)
 168
 169   /* Opaque-LSA administrative flags. */
 170   u_char opaque;
 171 #define OPAQUE_OPERATION_READY_BIT      (1 << 0)
 172
 173   /* RFC3137 stub router. Configured time to stay stub / max-metric */
 174   unsigned int stub_router_startup_time;        /* seconds */
 175   unsigned int stub_router_shutdown_time;       /* seconds */
 176 #define OSPF_STUB_ROUTER_UNCONFIGURED     0
 177   u_char       stub_router_admin_set;
 178 #define OSPF_STUB_ROUTER_ADMINISTRATIVE_SET     1
 179 #define OSPF_STUB_ROUTER_ADMINISTRATIVE_UNSET   0
 180
 181 #define OSPF_STUB_MAX_METRIC_SUMMARY_COST       0x00ff0000
 182
 183   /* LSA timers */
 184   unsigned int min_ls_interval; /* minimum delay between LSAs (in msec) */
 185   unsigned int min_ls_arrival; /* minimum interarrival time between LSAs (in msec) */
 186
 187   /* SPF parameters */
 188   unsigned int spf_delay;               /* SPF delay time. */
 189   unsigned int spf_holdtime;            /* SPF hold time. */
 190   unsigned int spf_max_holdtime;        /* SPF maximum-holdtime */
 191   unsigned int spf_hold_multiplier;     /* Adaptive multiplier for hold time */
 192
 193   int default_originate;                /* Default information originate. */
 194 #define DEFAULT_ORIGINATE_NONE          0
 195 #define DEFAULT_ORIGINATE_ZEBRA         1
 196 #define DEFAULT_ORIGINATE_ALWAYS        2
 197   u_int32_t ref_bandwidth;              /* Reference Bandwidth (Kbps). */
 198   struct route_table *networks;         /* OSPF config networks. */
 199   struct list *vlinks;                  /* Configured Virtual-Links. */
 200   struct list *areas;                   /* OSPF areas. */
 201   struct route_table *nbr_nbma;
 202   struct ospf_area *backbone;           /* Pointer to the Backbone Area. */
 203
 204   struct list *oiflist;                 /* ospf interfaces */
 205   u_char passive_interface_default;     /* passive-interface default */
 206
 207   /* LSDB of AS-external-LSAs. */
 208   struct ospf_lsdb *lsdb;
 209
 210   /* Flags. */
 211   int external_origin;                  /* AS-external-LSA origin flag. */
 212   int ase_calc;                         /* ASE calculation flag. */
 213
 214   struct list *opaque_lsa_self;         /* Type-11 Opaque-LSAs */
 215
 216   /* Routing tables. */
 217   struct route_table *old_table;        /* Old routing table. */
 218   struct route_table *new_table;        /* Current routing table. */
 219
 220   struct route_table *old_rtrs;         /* Old ABR/ASBR RT. */
 221   struct route_table *new_rtrs;         /* New ABR/ASBR RT. */
 222
 223   struct route_table *new_external_route;   /* New External Route. */
 224   struct route_table *old_external_route;   /* Old External Route. */
 225
 226   struct route_table *external_lsas;    /* Database of external LSAs,
 227                                            prefix is LSA's adv. network*/
 228
 229   /* Time stamps */
 230   struct timeval ts_spf;                /* SPF calculation time stamp. */
 231   struct timeval ts_spf_duration;       /* Execution time of last SPF */
 232
 233   struct route_table *maxage_lsa;       /* List of MaxAge LSA for deletion. */
 234   int redistribute;                     /* Num of redistributed protocols. */
 235
 236   /* Threads. */
 237   struct thread *t_abr_task;            /* ABR task timer. */
 238   struct thread *t_asbr_check;          /* ASBR check timer. */
 239   struct thread *t_distribute_update;   /* Distirbute list update timer. */
 240   struct thread *t_spf_calc;            /* SPF calculation timer. */
 241   struct thread *t_ase_calc;            /* ASE calculation timer. */
 242   struct thread *t_external_lsa;        /* AS-external-LSA origin timer. */
 243   struct thread *t_opaque_lsa_self;     /* Type-11 Opaque-LSAs origin event. */
 244
 245   unsigned int maxage_delay;            /* Delay on Maxage remover timer, sec */
 246   struct thread *t_maxage;              /* MaxAge LSA remover timer. */
 247   struct thread *t_maxage_walker;       /* MaxAge LSA checking timer. */
 248
 249   struct thread *t_deferred_shutdown;   /* deferred/stub-router shutdown timer*/
 250
 251   struct thread *t_write;
 252 #define OSPF_WRITE_INTERFACE_COUNT_DEFAULT    20
 253   int write_oi_count;         /* Num of packets sent per thread invocation */
 254   struct thread *t_read;
 255   int fd;
 256   struct stream *ibuf;
 257   struct list *oi_write_q;
 258
 259   /* Distribute lists out of other route sources. */
 260   struct
 261   {
 262     char *name;
 263     struct access_list *list;
 264   } dlist[ZEBRA_ROUTE_MAX];
 265 #define DISTRIBUTE_NAME(O,T)    (O)->dlist[T].name
 266 #define DISTRIBUTE_LIST(O,T)    (O)->dlist[T].list
 267
 268   /* OSPF redistribute configuration */
 269   struct list *redist[ZEBRA_ROUTE_MAX + 1];
 270
 271   /* Redistribute tag info. */
 272   route_tag_t dtag[ZEBRA_ROUTE_MAX + 1]; //Pending: cant configure as of now
 273
 274   int default_metric;           /* Default metric for redistribute. */
 275
 276 #define OSPF_LSA_REFRESHER_GRANULARITY 10
 277 #define OSPF_LSA_REFRESHER_SLOTS ((OSPF_LS_REFRESH_TIME + \
 278                                   OSPF_LS_REFRESH_SHIFT)/OSPF_LSA_REFRESHER_GRANULARITY + 1)
 279   struct
 280   {
 281     u_int16_t index;
 282     struct list *qs[OSPF_LSA_REFRESHER_SLOTS];
 283   } lsa_refresh_queue;
 284
 285   struct thread *t_lsa_refresher;
 286   time_t lsa_refresher_started;
 287 #define OSPF_LSA_REFRESH_INTERVAL_DEFAULT 10
 288   u_int16_t lsa_refresh_interval;
 289
 290   /* Distance parameter. */
 291   u_char distance_all;
 292   u_char distance_intra;
 293   u_char distance_inter;
 294   u_char distance_external;
 295
 296   /* Statistics for LSA origination. */
 297   u_int32_t lsa_originate_count;
 298
 299   /* Statistics for LSA used for new instantiation. */
 300   u_int32_t rx_lsa_count;
 301
 302   /* Counter of "ip ospf area x.x.x.x" */
 303   u_int32_t if_ospf_cli_count;
 304
 305   struct route_table *distance_table;
 306
 307   QOBJ_FIELDS
 308 };
 309 DECLARE_QOBJ_TYPE(ospf)
 310
 311 /* OSPF area structure. */
 312 struct ospf_area
 313 {
 314   /* OSPF instance. */
 315   struct ospf *ospf;
 316
 317   /* Zebra interface list belonging to the area. */
 318   struct list *oiflist;
 319
 320   /* Area ID. */
 321   struct in_addr area_id;
 322
 323   /* Area ID format. */
 324   int area_id_fmt;
 325 #define OSPF_AREA_ID_FMT_DOTTEDQUAD     1
 326 #define OSPF_AREA_ID_FMT_DECIMAL        2
 327
 328   /* Address range. */
 329   struct list *address_range;
 330
 331   /* Configured variables. */
 332   int external_routing;                 /* ExternalRoutingCapability. */
 333   int no_summary;                       /* Don't inject summaries into stub.*/
 334   int shortcut_configured;              /* Area configured as shortcut. */
 335 #define OSPF_SHORTCUT_DEFAULT   0
 336 #define OSPF_SHORTCUT_ENABLE    1
 337 #define OSPF_SHORTCUT_DISABLE   2
 338   int shortcut_capability;              /* Other ABRs agree on S-bit */
 339   u_int32_t default_cost;               /* StubDefaultCost. */
 340   int auth_type;                        /* Authentication type. */
 341
 342
 343   u_char NSSATranslatorRole;          /* NSSA configured role */
 344 #define OSPF_NSSA_ROLE_NEVER     0
 345 #define OSPF_NSSA_ROLE_CANDIDATE 1
 346 #define OSPF_NSSA_ROLE_ALWAYS    2
 347   u_char NSSATranslatorState;              /* NSSA operational role */
 348 #define OSPF_NSSA_TRANSLATE_DISABLED 0
 349 #define OSPF_NSSA_TRANSLATE_ENABLED  1
 350   int NSSATranslatorStabilityInterval;
 351
 352   u_char transit;                       /* TransitCapability. */
 353 #define OSPF_TRANSIT_FALSE      0
 354 #define OSPF_TRANSIT_TRUE       1
 355   struct route_table *ranges;           /* Configured Area Ranges. */
 356
 357   /* RFC3137 stub router state flags for area */
 358   u_char stub_router_state;
 359 #define OSPF_AREA_ADMIN_STUB_ROUTED     (1 << 0) /* admin stub-router set */
 360 #define OSPF_AREA_IS_STUB_ROUTED        (1 << 1) /* stub-router active */
 361 #define OSPF_AREA_WAS_START_STUB_ROUTED (1 << 2) /* startup SR was done */
 362
 363   /* Area related LSDBs[Type1-4]. */
 364   struct ospf_lsdb *lsdb;
 365
 366   /* Self-originated LSAs. */
 367   struct ospf_lsa *router_lsa_self;
 368   struct list *opaque_lsa_self;         /* Type-10 Opaque-LSAs */
 369
 370   /* Area announce list. */
 371   struct
 372   {
 373     char *name;
 374     struct access_list *list;
 375   } _export;
 376 #define EXPORT_NAME(A)  (A)->_export.name
 377 #define EXPORT_LIST(A)  (A)->_export.list
 378
 379   /* Area acceptance list. */
 380   struct
 381   {
 382     char *name;
 383     struct access_list *list;
 384   } import;
 385 #define IMPORT_NAME(A)  (A)->import.name
 386 #define IMPORT_LIST(A)  (A)->import.list
 387
 388   /* Type 3 LSA Area prefix-list. */
 389   struct
 390   {
 391     char *name;
 392     struct prefix_list *list;
 393   } plist_in;
 394 #define PREFIX_LIST_IN(A)   (A)->plist_in.list
 395 #define PREFIX_NAME_IN(A)   (A)->plist_in.name
 396
 397   struct
 398   {
 399     char *name;
 400     struct prefix_list *list;
 401   } plist_out;
 402 #define PREFIX_LIST_OUT(A)  (A)->plist_out.list
 403 #define PREFIX_NAME_OUT(A)  (A)->plist_out.name
 404
 405   /* Shortest Path Tree. */
 406   struct vertex *spf;
 407
 408   /* Threads. */
 409   struct thread *t_stub_router;    /* Stub-router timer */
 410   struct thread *t_opaque_lsa_self;     /* Type-10 Opaque-LSAs origin. */
 411
 412   /* Statistics field. */
 413   u_int32_t spf_calculation;    /* SPF Calculation Count. */
 414
 415   /* Time stamps. */
 416   struct timeval ts_spf;                /* SPF calculation time stamp. */
 417
 418   /* Router count. */
 419   u_int32_t abr_count;          /* ABR router in this area. */
 420   u_int32_t asbr_count;         /* ASBR router in this area. */
 421
 422   /* Counters. */
 423   u_int32_t act_ints;           /* Active interfaces. */
 424   u_int32_t full_nbrs;          /* Fully adjacent neighbors. */
 425   u_int32_t full_vls;           /* Fully adjacent virtual neighbors. */
 426 };
 427
 428 /* OSPF config network structure. */
 429 struct ospf_network
 430 {
 431   /* Area ID. */
 432   struct in_addr area_id;
 433   int area_id_fmt;
 434 };
 435
 436 /* OSPF NBMA neighbor structure. */
 437 struct ospf_nbr_nbma
 438 {
 439   /* Neighbor IP address. */
 440   struct in_addr addr;
 441
 442   /* OSPF interface. */
 443   struct ospf_interface *oi;
 444
 445   /* OSPF neighbor structure. */
 446   struct ospf_neighbor *nbr;
 447
 448   /* Neighbor priority. */
 449   u_char priority;
 450
 451   /* Poll timer value. */
 452   u_int32_t v_poll;
 453
 454   /* Poll timer thread. */
 455   struct thread *t_poll;
 456
 457   /* State change. */
 458   u_int32_t state_change;
 459 };
 460
 461 /* Macro. */
 462 #define OSPF_AREA_SAME(X,Y) \
 463         (memcmp ((X->area_id), (Y->area_id), IPV4_MAX_BYTELEN) == 0)
 464
 465 #define IS_OSPF_ABR(O)          ((O)->flags & OSPF_FLAG_ABR)
 466 #define IS_OSPF_ASBR(O)         ((O)->flags & OSPF_FLAG_ASBR)
 467
 468 #define OSPF_IS_AREA_ID_BACKBONE(I) ((I).s_addr == OSPF_AREA_BACKBONE)
 469 #define OSPF_IS_AREA_BACKBONE(A) OSPF_IS_AREA_ID_BACKBONE ((A)->area_id)
 470
 471 #ifdef roundup
 472 #  define ROUNDUP(val, gran)    roundup(val, gran)
 473 #else /* roundup */
 474 #  define ROUNDUP(val, gran)    (((val) - 1 | (gran) - 1) + 1)
 475 #endif /* roundup */
 476
 477 #define LSA_OPTIONS_GET(area) \
 478         (((area)->external_routing == OSPF_AREA_DEFAULT) ? OSPF_OPTION_E : 0)
 479 #define LSA_OPTIONS_NSSA_GET(area) \
 480         (((area)->external_routing == OSPF_AREA_NSSA)  ? OSPF_OPTION_NP : 0)
 481
 482 #define OSPF_TIMER_ON(T,F,V) thread_add_timer (master,(F),ospf,(V),&(T))
 483 #define OSPF_AREA_TIMER_ON(T,F,V) thread_add_timer (master, (F), area, (V), &(T))
 484 #define OSPF_POLL_TIMER_ON(T,F,V) thread_add_timer (master, (F), nbr_nbma, (V), &(T))
 485 #define OSPF_POLL_TIMER_OFF(X) OSPF_TIMER_OFF((X))
 486 #define OSPF_TIMER_OFF(X)                                                     \
 487     do {                                                                      \
 488       if (X)                                                                  \
 489         {                                                                     \
 490           thread_cancel (X);                                                  \
 491           (X) = NULL;                                                         \
 492         }                                                                     \
 493     } while (0)
 494
 495 /* Extern variables. */
 496 extern struct ospf_master *om;
 497 extern const int ospf_redistributed_proto_max;
 498 extern struct zclient *zclient;
 499 extern struct thread_master *master;
 500 extern int ospf_zlog;
 501
 502 /* Prototypes. */
 503 extern const char *ospf_redist_string(u_int route_type);
 504 extern struct ospf *ospf_lookup (void);
 505 extern struct ospf *ospf_lookup_instance (u_short);
 506 extern struct ospf *ospf_get (void);
 507 extern struct ospf *ospf_get_instance (u_short);
 508 extern void ospf_finish (struct ospf *);
 509 extern void ospf_router_id_update (struct ospf *ospf);
 510 extern int ospf_network_set (struct ospf *, struct prefix_ipv4 *,
 511                              struct in_addr, int);
 512 extern int ospf_network_unset (struct ospf *, struct prefix_ipv4 *,
 513                                struct in_addr);
 514 extern int ospf_area_display_format_set (struct ospf *, struct ospf_area *area,
 515                                          int df);
 516 extern int ospf_area_stub_set (struct ospf *, struct in_addr);
 517 extern int ospf_area_stub_unset (struct ospf *, struct in_addr);
 518 extern int ospf_area_no_summary_set (struct ospf *, struct in_addr);
 519 extern int ospf_area_no_summary_unset (struct ospf *, struct in_addr);
 520 extern int ospf_area_nssa_set (struct ospf *, struct in_addr);
 521 extern int ospf_area_nssa_unset (struct ospf *, struct in_addr);
 522 extern int ospf_area_nssa_translator_role_set (struct ospf *, struct in_addr,
 523                                                int);
 524 extern int ospf_area_export_list_set (struct ospf *, struct ospf_area *,
 525                                       const char *);
 526 extern int ospf_area_export_list_unset (struct ospf *, struct ospf_area *);
 527 extern int ospf_area_import_list_set (struct ospf *, struct ospf_area *,
 528                                       const char *);
 529 extern int ospf_area_import_list_unset (struct ospf *, struct ospf_area *);
 530 extern int ospf_area_shortcut_set (struct ospf *, struct ospf_area *, int);
 531 extern int ospf_area_shortcut_unset (struct ospf *, struct ospf_area *);
 532 extern int ospf_timers_refresh_set (struct ospf *, int);
 533 extern int ospf_timers_refresh_unset (struct ospf *);
 534 extern int ospf_nbr_nbma_set (struct ospf *, struct in_addr);
 535 extern int ospf_nbr_nbma_unset (struct ospf *, struct in_addr);
 536 extern int ospf_nbr_nbma_priority_set (struct ospf *, struct in_addr, u_char);
 537 extern int ospf_nbr_nbma_priority_unset (struct ospf *, struct in_addr);
 538 extern int ospf_nbr_nbma_poll_interval_set (struct ospf *, struct in_addr,
 539                                             unsigned int);
 540 extern int ospf_nbr_nbma_poll_interval_unset (struct ospf *, struct in_addr);
 541 extern void ospf_prefix_list_update (struct prefix_list *);
 542 extern void ospf_init (void);
 543 extern void ospf_if_update (struct ospf *, struct interface *);
 544 extern void ospf_ls_upd_queue_empty (struct ospf_interface *);
 545 extern void ospf_terminate (void);
 546 extern void ospf_nbr_nbma_if_update (struct ospf *, struct ospf_interface *);
 547 extern struct ospf_nbr_nbma *ospf_nbr_nbma_lookup (struct ospf *,
 548                                                    struct in_addr);
 549 extern struct ospf_nbr_nbma *ospf_nbr_nbma_lookup_next (struct ospf *,
 550                                                         struct in_addr *,
 551                                                         int);
 552 extern int ospf_oi_count (struct interface *);
 553
 554 extern struct ospf_area *ospf_area_get (struct ospf *, struct in_addr);
 555 extern void ospf_area_check_free (struct ospf *, struct in_addr);
 556 extern struct ospf_area *ospf_area_lookup_by_area_id (struct ospf *,
 557                                                       struct in_addr);
 558 extern void ospf_area_add_if (struct ospf_area *, struct ospf_interface *);
 559 extern void ospf_area_del_if (struct ospf_area *, struct ospf_interface *);
 560
 561 extern void ospf_route_map_init (void);
 562
 563 extern void ospf_master_init (struct thread_master *master);
 564
 565 extern int ospf_interface_set (struct interface *ifp, struct in_addr area_id);
 566 extern int ospf_interface_unset (struct interface *ifp);
 567 #endif /* _ZEBRA_OSPFD_H */