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 /* OSPF Authentication Type. */
  53 #define OSPF_AUTH_NULL                      0
  54 #define OSPF_AUTH_SIMPLE                    1
  55 #define OSPF_AUTH_CRYPTOGRAPHIC             2
  56 /* For Interface authentication setting default */
  57 #define OSPF_AUTH_NOTSET                   -1
  58 /* For the consumption and sanity of the command handler */
  59 /* DO NIOT REMOVE!!! Need to detect whether a value has
  60    been given or not in VLink command handlers */
  61 #define OSPF_AUTH_CMD_NOTSEEN              -2
  62
  63 /* OSPF options. */
  64 #define OSPF_OPTION_MT                   0x01  /* M/T */
  65 #define OSPF_OPTION_E                    0x02
  66 #define OSPF_OPTION_MC                   0x04
  67 #define OSPF_OPTION_NP                   0x08
  68 #define OSPF_OPTION_EA                   0x10
  69 #define OSPF_OPTION_DC                   0x20
  70 #define OSPF_OPTION_O                    0x40
  71 #define OSPF_OPTION_DN                   0x80
  72
  73 /* OSPF Database Description flags. */
  74 #define OSPF_DD_FLAG_MS                  0x01
  75 #define OSPF_DD_FLAG_M                   0x02
  76 #define OSPF_DD_FLAG_I                   0x04
  77 #define OSPF_DD_FLAG_ALL                 0x07
  78
  79 #define OSPF_LS_REFRESH_SHIFT       (60 * 15)
  80 #define OSPF_LS_REFRESH_JITTER      60
  81
  82 struct ospf_external {
  83         u_short instance;
  84         struct route_table *external_info;
  85 };
  86
  87 /* OSPF master for system wide configuration and variables. */
  88 struct ospf_master {
  89         /* OSPF instance. */
  90         struct list *ospf;
  91
  92         /* OSPF thread master. */
  93         struct thread_master *master;
  94
  95         /* Zebra interface list. */
  96         struct list *iflist;
  97
  98         /* Redistributed external information. */
  99         struct list *external[ZEBRA_ROUTE_MAX + 1];
 100 #define EXTERNAL_INFO(E)      (E->external_info)
 101
 102         /* Various OSPF global configuration. */
 103         u_char options;
 104 #define OSPF_MASTER_SHUTDOWN (1 << 0) /* deferred-shutdown */
 105 };
 106
 107 struct ospf_redist {
 108         u_short instance;
 109
 110         /* Redistribute metric info. */
 111         struct {
 112                 int type;  /* External metric type (E1 or E2).  */
 113                 int value; /* Value for static metric (24-bit).
 114                               -1 means metric value is not set. */
 115         } dmetric;
 116
 117         /* For redistribute route map. */
 118         struct {
 119                 char *name;
 120                 struct route_map *map;
 121         } route_map; /* +1 is for default-information */
 122 #define ROUTEMAP_NAME(R)   (R->route_map.name)
 123 #define ROUTEMAP(R)        (R->route_map.map)
 124 };
 125
 126 /* OSPF instance structure. */
 127 struct ospf {
 128         /* OSPF's running state based on the '[no] router ospf [<instance>]'
 129          * config. */
 130         u_char oi_running;
 131
 132         /* OSPF instance ID  */
 133         u_short instance;
 134
 135         /* OSPF Router ID. */
 136         struct in_addr router_id;       /* Configured automatically. */
 137         struct in_addr router_id_static; /* Configured manually. */
 138
 139         /* ABR/ASBR internal flags. */
 140         u_char flags;
 141 #define OSPF_FLAG_ABR           0x0001
 142 #define OSPF_FLAG_ASBR          0x0002
 143
 144         /* ABR type. */
 145         u_char abr_type;
 146 #define OSPF_ABR_UNKNOWN        0
 147 #define OSPF_ABR_STAND          1
 148 #define OSPF_ABR_IBM            2
 149 #define OSPF_ABR_CISCO          3
 150 #define OSPF_ABR_SHORTCUT       4
 151 #define OSPF_ABR_DEFAULT        OSPF_ABR_CISCO
 152
 153         /* NSSA ABR */
 154         u_char anyNSSA; /* Bump for every NSSA attached. */
 155
 156         /* Configured variables. */
 157         u_char config;
 158 #define OSPF_RFC1583_COMPATIBLE         (1 << 0)
 159 #define OSPF_OPAQUE_CAPABLE             (1 << 2)
 160 #define OSPF_LOG_ADJACENCY_CHANGES      (1 << 3)
 161 #define OSPF_LOG_ADJACENCY_DETAIL       (1 << 4)
 162
 163         /* Opaque-LSA administrative flags. */
 164         u_char opaque;
 165 #define OPAQUE_OPERATION_READY_BIT      (1 << 0)
 166
 167         /* RFC3137 stub router. Configured time to stay stub / max-metric */
 168         unsigned int stub_router_startup_time;  /* seconds */
 169         unsigned int stub_router_shutdown_time; /* seconds */
 170                                                 /* $FRR indent$ */
 171                                                 /* clang-format off */
 172 #define OSPF_STUB_ROUTER_UNCONFIGURED     0
 173         u_char stub_router_admin_set;
 174 #define OSPF_STUB_ROUTER_ADMINISTRATIVE_SET     1
 175 #define OSPF_STUB_ROUTER_ADMINISTRATIVE_UNSET   0
 176
 177 #define OSPF_STUB_MAX_METRIC_SUMMARY_COST       0x00ff0000
 178
 179         /* LSA timers */
 180         unsigned int min_ls_interval; /* minimum delay between LSAs (in msec) */
 181         unsigned int min_ls_arrival;  /* minimum interarrival time between LSAs
 182                                          (in msec) */
 183
 184         /* SPF parameters */
 185         unsigned int spf_delay; /* SPF delay time. */
 186         unsigned int spf_holdtime;     /* SPF hold time. */
 187         unsigned int spf_max_holdtime; /* SPF maximum-holdtime */
 188         unsigned int
 189                 spf_hold_multiplier; /* Adaptive multiplier for hold time */
 190
 191         int default_originate;  /* Default information originate. */
 192                                       /* $FRR indent$ */
 193                                       /* clang-format off */
 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
 244                 *t_opaque_lsa_self; /* Type-11 Opaque-LSAs origin event. */
 245
 246         unsigned int maxage_delay;      /* Delay on Maxage remover timer, sec */
 247         struct thread *t_maxage;        /* MaxAge LSA remover timer. */
 248         struct thread *t_maxage_walker; /* MaxAge LSA checking timer. */
 249
 250         struct thread
 251                 *t_deferred_shutdown; /* deferred/stub-router shutdown timer*/
 252
 253         struct thread *t_write;
 254 #define OSPF_WRITE_INTERFACE_COUNT_DEFAULT    20
 255         int write_oi_count; /* Num of packets sent per thread invocation */
 256         struct thread *t_read;
 257         int fd;
 258         struct stream *ibuf;
 259         struct list *oi_write_q;
 260
 261         /* Distribute lists out of other route sources. */
 262         struct {
 263                 char *name;
 264                 struct access_list *list;
 265         } dlist[ZEBRA_ROUTE_MAX];
 266 #define DISTRIBUTE_NAME(O,T)    (O)->dlist[T].name
 267 #define DISTRIBUTE_LIST(O,T)    (O)->dlist[T].list
 268
 269         /* OSPF redistribute configuration */
 270         struct list *redist[ZEBRA_ROUTE_MAX + 1];
 271
 272         /* Redistribute tag info. */
 273         route_tag_t
 274                 dtag[ZEBRA_ROUTE_MAX + 1]; // Pending: cant configure as of now
 275
 276         int default_metric; /* Default metric for redistribute. */
 277
 278 #define OSPF_LSA_REFRESHER_GRANULARITY 10
 279 #define OSPF_LSA_REFRESHER_SLOTS                                               \
 280         ((OSPF_LS_REFRESH_TIME + OSPF_LS_REFRESH_SHIFT)                        \
 281                  / OSPF_LSA_REFRESHER_GRANULARITY                              \
 282          + 1)
 283         struct {
 284                 u_int16_t index;
 285                 struct list *qs[OSPF_LSA_REFRESHER_SLOTS];
 286         } lsa_refresh_queue;
 287
 288         struct thread *t_lsa_refresher;
 289         time_t lsa_refresher_started;
 290 #define OSPF_LSA_REFRESH_INTERVAL_DEFAULT 10
 291         u_int16_t lsa_refresh_interval;
 292
 293         /* Distance parameter. */
 294         u_char distance_all;
 295         u_char distance_intra;
 296         u_char distance_inter;
 297         u_char distance_external;
 298
 299         /* Statistics for LSA origination. */
 300         u_int32_t lsa_originate_count;
 301
 302         /* Statistics for LSA used for new instantiation. */
 303         u_int32_t rx_lsa_count;
 304
 305         /* Counter of "ip ospf area x.x.x.x" */
 306         u_int32_t if_ospf_cli_count;
 307
 308         struct route_table *distance_table;
 309
 310         QOBJ_FIELDS
 311 };
 312 DECLARE_QOBJ_TYPE(ospf)
 313
 314 /* OSPF area structure. */
 315 struct ospf_area {
 316         /* OSPF instance. */
 317         struct ospf *ospf;
 318
 319         /* Zebra interface list belonging to the area. */
 320         struct list *oiflist;
 321
 322         /* Area ID. */
 323         struct in_addr area_id;
 324
 325         /* Area ID format. */
 326         int area_id_fmt;
 327 #define OSPF_AREA_ID_FMT_DOTTEDQUAD     1
 328 #define OSPF_AREA_ID_FMT_DECIMAL        2
 329
 330         /* Address range. */
 331         struct list *address_range;
 332
 333         /* Configured variables. */
 334         int external_routing;    /* ExternalRoutingCapability. */
 335         int no_summary;          /* Don't inject summaries into stub.*/
 336         int shortcut_configured; /* Area configured as shortcut. */
 337                                  /* $FRR indent$ */
 338                                  /* clang-format off */
 339 #define OSPF_SHORTCUT_DEFAULT   0
 340 #define OSPF_SHORTCUT_ENABLE    1
 341 #define OSPF_SHORTCUT_DISABLE   2
 342         int shortcut_capability; /* Other ABRs agree on S-bit */
 343         u_int32_t default_cost;  /* StubDefaultCost. */
 344         int auth_type;           /* Authentication type. */
 345
 346
 347         u_char NSSATranslatorRole;  /* NSSA configured role */
 348                                     /* $FRR indent$ */
 349                                     /* clang-format off */
 350 #define OSPF_NSSA_ROLE_NEVER     0
 351 #define OSPF_NSSA_ROLE_CANDIDATE 1
 352 #define OSPF_NSSA_ROLE_ALWAYS    2
 353         u_char NSSATranslatorState; /* NSSA operational role */
 354                                     /* $FRR indent$ */
 355                                     /* clang-format off */
 356 #define OSPF_NSSA_TRANSLATE_DISABLED 0
 357 #define OSPF_NSSA_TRANSLATE_ENABLED  1
 358         int NSSATranslatorStabilityInterval;
 359
 360         u_char transit;             /* TransitCapability. */
 361                                     /* $FRR indent$ */
 362                                     /* clang-format off */
 363 #define OSPF_TRANSIT_FALSE      0
 364 #define OSPF_TRANSIT_TRUE       1
 365         struct route_table *ranges; /* Configured Area Ranges. */
 366
 367         /* RFC3137 stub router state flags for area */
 368         u_char stub_router_state;
 369 #define OSPF_AREA_ADMIN_STUB_ROUTED     (1 << 0) /* admin stub-router set */
 370 #define OSPF_AREA_IS_STUB_ROUTED        (1 << 1) /* stub-router active */
 371 #define OSPF_AREA_WAS_START_STUB_ROUTED (1 << 2) /* startup SR was done */
 372         /* Area related LSDBs[Type1-4]. */
 373         struct ospf_lsdb *lsdb;
 374
 375         /* Self-originated LSAs. */
 376         struct ospf_lsa *router_lsa_self;
 377         struct list *opaque_lsa_self; /* Type-10 Opaque-LSAs */
 378
 379         /* Area announce list. */
 380         struct {
 381                 char *name;
 382                 struct access_list *list;
 383         } _export;
 384 #define EXPORT_NAME(A)  (A)->_export.name
 385 #define EXPORT_LIST(A)  (A)->_export.list
 386
 387         /* Area acceptance list. */
 388         struct {
 389                 char *name;
 390                 struct access_list *list;
 391         } import;
 392 #define IMPORT_NAME(A)  (A)->import.name
 393 #define IMPORT_LIST(A)  (A)->import.list
 394
 395         /* Type 3 LSA Area prefix-list. */
 396         struct {
 397                 char *name;
 398                 struct prefix_list *list;
 399         } plist_in;
 400 #define PREFIX_LIST_IN(A)   (A)->plist_in.list
 401 #define PREFIX_NAME_IN(A)   (A)->plist_in.name
 402
 403         struct {
 404                 char *name;
 405                 struct prefix_list *list;
 406         } plist_out;
 407 #define PREFIX_LIST_OUT(A)  (A)->plist_out.list
 408 #define PREFIX_NAME_OUT(A)  (A)->plist_out.name
 409
 410         /* Shortest Path Tree. */
 411         struct vertex *spf;
 412
 413         /* Threads. */
 414         struct thread *t_stub_router;     /* Stub-router timer */
 415         struct thread *t_opaque_lsa_self; /* Type-10 Opaque-LSAs origin. */
 416
 417         /* Statistics field. */
 418         u_int32_t spf_calculation; /* SPF Calculation Count. */
 419
 420         /* Time stamps. */
 421         struct timeval ts_spf; /* SPF calculation time stamp. */
 422
 423         /* Router count. */
 424         u_int32_t abr_count;  /* ABR router in this area. */
 425         u_int32_t asbr_count; /* ASBR router in this area. */
 426
 427         /* Counters. */
 428         u_int32_t act_ints;  /* Active interfaces. */
 429         u_int32_t full_nbrs; /* Fully adjacent neighbors. */
 430         u_int32_t full_vls;  /* Fully adjacent virtual neighbors. */
 431 };
 432
 433 /* OSPF config network structure. */
 434 struct ospf_network {
 435         /* Area ID. */
 436         struct in_addr area_id;
 437         int area_id_fmt;
 438 };
 439
 440 /* OSPF NBMA neighbor structure. */
 441 struct ospf_nbr_nbma {
 442         /* Neighbor IP address. */
 443         struct in_addr addr;
 444
 445         /* OSPF interface. */
 446         struct ospf_interface *oi;
 447
 448         /* OSPF neighbor structure. */
 449         struct ospf_neighbor *nbr;
 450
 451         /* Neighbor priority. */
 452         u_char priority;
 453
 454         /* Poll timer value. */
 455         u_int32_t v_poll;
 456
 457         /* Poll timer thread. */
 458         struct thread *t_poll;
 459
 460         /* State change. */
 461         u_int32_t state_change;
 462 };
 463
 464 /* Macro. */
 465 #define OSPF_AREA_SAME(X, Y)                                                   \
 466         (memcmp((X->area_id), (Y->area_id), IPV4_MAX_BYTELEN) == 0)
 467
 468 #define IS_OSPF_ABR(O)          ((O)->flags & OSPF_FLAG_ABR)
 469 #define IS_OSPF_ASBR(O)         ((O)->flags & OSPF_FLAG_ASBR)
 470
 471 #define OSPF_IS_AREA_ID_BACKBONE(I) ((I).s_addr == OSPF_AREA_BACKBONE)
 472 #define OSPF_IS_AREA_BACKBONE(A) OSPF_IS_AREA_ID_BACKBONE ((A)->area_id)
 473
 474 #ifdef roundup
 475 #  define ROUNDUP(val, gran)    roundup(val, gran)
 476 #else  /* roundup */
 477 #  define ROUNDUP(val, gran)    (((val) - 1 | (gran) - 1) + 1)
 478 #endif /* roundup */
 479
 480 #define LSA_OPTIONS_GET(area)                                                  \
 481         (((area)->external_routing == OSPF_AREA_DEFAULT) ? OSPF_OPTION_E : 0)
 482 #define LSA_OPTIONS_NSSA_GET(area)                                             \
 483         (((area)->external_routing == OSPF_AREA_NSSA) ? OSPF_OPTION_NP : 0)
 484
 485 #define OSPF_TIMER_ON(T,F,V) thread_add_timer (master,(F),ospf,(V),&(T))
 486 #define OSPF_AREA_TIMER_ON(T,F,V) thread_add_timer (master, (F), area, (V), &(T))
 487 #define OSPF_POLL_TIMER_ON(T,F,V) thread_add_timer (master, (F), nbr_nbma, (V), &(T))
 488 #define OSPF_POLL_TIMER_OFF(X) OSPF_TIMER_OFF((X))
 489 #define OSPF_TIMER_OFF(X)                                                      \
 490         do {                                                                   \
 491                 if (X) {                                                       \
 492                         thread_cancel(X);                                      \
 493                         (X) = NULL;                                            \
 494                 }                                                              \
 495         } while (0)
 496
 497 /* Extern variables. */
 498 extern struct ospf_master *om;
 499 extern const int ospf_redistributed_proto_max;
 500 extern struct zclient *zclient;
 501 extern struct thread_master *master;
 502 extern int ospf_zlog;
 503
 504 /* Prototypes. */
 505 extern const char *ospf_redist_string(u_int route_type);
 506 extern struct ospf *ospf_lookup(void);
 507 extern struct ospf *ospf_lookup_instance(u_short);
 508 extern struct ospf *ospf_get(void);
 509 extern struct ospf *ospf_get_instance(u_short);
 510 extern void ospf_finish(struct ospf *);
 511 extern void ospf_router_id_update(struct ospf *ospf);
 512 extern int ospf_network_set(struct ospf *, struct prefix_ipv4 *, struct in_addr,
 513                             int);
 514 extern int ospf_network_unset(struct ospf *, struct prefix_ipv4 *,
 515                               struct in_addr);
 516 extern int ospf_area_display_format_set(struct ospf *, struct ospf_area *area,
 517                                         int df);
 518 extern int ospf_area_stub_set(struct ospf *, struct in_addr);
 519 extern int ospf_area_stub_unset(struct ospf *, struct in_addr);
 520 extern int ospf_area_no_summary_set(struct ospf *, struct in_addr);
 521 extern int ospf_area_no_summary_unset(struct ospf *, struct in_addr);
 522 extern int ospf_area_nssa_set(struct ospf *, struct in_addr);
 523 extern int ospf_area_nssa_unset(struct ospf *, struct in_addr);
 524 extern int ospf_area_nssa_translator_role_set(struct ospf *, struct in_addr,
 525                                               int);
 526 extern int ospf_area_export_list_set(struct ospf *, struct ospf_area *,
 527                                      const char *);
 528 extern int ospf_area_export_list_unset(struct ospf *, struct ospf_area *);
 529 extern int ospf_area_import_list_set(struct ospf *, struct ospf_area *,
 530                                      const char *);
 531 extern int ospf_area_import_list_unset(struct ospf *, struct ospf_area *);
 532 extern int ospf_area_shortcut_set(struct ospf *, struct ospf_area *, int);
 533 extern int ospf_area_shortcut_unset(struct ospf *, struct ospf_area *);
 534 extern int ospf_timers_refresh_set(struct ospf *, int);
 535 extern int ospf_timers_refresh_unset(struct ospf *);
 536 extern int ospf_nbr_nbma_set(struct ospf *, struct in_addr);
 537 extern int ospf_nbr_nbma_unset(struct ospf *, struct in_addr);
 538 extern int ospf_nbr_nbma_priority_set(struct ospf *, struct in_addr, u_char);
 539 extern int ospf_nbr_nbma_priority_unset(struct ospf *, struct in_addr);
 540 extern int ospf_nbr_nbma_poll_interval_set(struct ospf *, struct in_addr,
 541                                            unsigned int);
 542 extern int ospf_nbr_nbma_poll_interval_unset(struct ospf *, struct in_addr);
 543 extern void ospf_prefix_list_update(struct prefix_list *);
 544 extern void ospf_init(void);
 545 extern void ospf_if_update(struct ospf *, struct interface *);
 546 extern void ospf_ls_upd_queue_empty(struct ospf_interface *);
 547 extern void ospf_terminate(void);
 548 extern void ospf_nbr_nbma_if_update(struct ospf *, struct ospf_interface *);
 549 extern struct ospf_nbr_nbma *ospf_nbr_nbma_lookup(struct ospf *,
 550                                                   struct in_addr);
 551 extern struct ospf_nbr_nbma *ospf_nbr_nbma_lookup_next(struct ospf *,
 552                                                        struct in_addr *, int);
 553 extern int ospf_oi_count(struct interface *);
 554
 555 extern struct ospf_area *ospf_area_get(struct ospf *, struct in_addr);
 556 extern void ospf_area_check_free(struct ospf *, struct in_addr);
 557 extern struct ospf_area *ospf_area_lookup_by_area_id(struct ospf *,
 558                                                      struct in_addr);
 559 extern void ospf_area_add_if(struct ospf_area *, struct ospf_interface *);
 560 extern void ospf_area_del_if(struct ospf_area *, struct ospf_interface *);
 561
 562 extern void ospf_interface_area_set(struct interface *);
 563 extern void ospf_interface_area_unset(struct interface *);
 564
 565 extern void ospf_route_map_init(void);
 566
 567 extern void ospf_master_init(struct thread_master *master);
 568
 569 #endif /* _ZEBRA_OSPFD_H */