proto/ospf/ospf.h

   1 /*
   2  *      BIRD -- OSPF
   3  *
   4  *      (c) 1999--2005 Ondrej Filip <feela@network.cz>
   5  *      (c) 2009--2014 Ondrej Zajicek <santiago@crfreenet.org>
   6  *      (c) 2009--2014 CZ.NIC z.s.p.o.
   7  *
   8  *      Can be freely distributed and used under the terms of the GNU GPL.
   9  */
  10
  11 #ifndef _BIRD_OSPF_H_
  12 #define _BIRD_OSPF_H_
  13
  14 #include "nest/bird.h"
  15
  16 #include "lib/checksum.h"
  17 #include "lib/idm.h"
  18 #include "lib/lists.h"
  19 #include "lib/slists.h"
  20 #include "lib/socket.h"
  21 #include "lib/timer.h"
  22 #include "lib/resource.h"
  23 #include "nest/protocol.h"
  24 #include "nest/iface.h"
  25 #include "nest/route.h"
  26 #include "nest/cli.h"
  27 #include "nest/locks.h"
  28 #include "nest/bfd.h"
  29 #include "conf/conf.h"
  30 #include "lib/string.h"
  31
  32
  33 #ifdef LOCAL_DEBUG
  34 #define OSPF_FORCE_DEBUG 1
  35 #else
  36 #define OSPF_FORCE_DEBUG 0
  37 #endif
  38
  39
  40 #define OSPF_TRACE(flags, msg, args...) \
  41   do { if ((p->p.debug & flags) || OSPF_FORCE_DEBUG) \
  42     log(L_TRACE "%s: " msg, p->p.name , ## args ); } while(0)
  43
  44 #define OSPF_PACKET(dumpfn, buffer, msg, args...) \
  45   do { if ((p->p.debug & D_PACKETS) || OSPF_FORCE_DEBUG)                \
  46     { log(L_TRACE "%s: " msg, p->p.name, ## args ); dumpfn(p, buffer); } } while(0)
  47
  48 #define LOG_PKT(msg, args...) \
  49   log_rl(&p->log_pkt_tbf, L_REMOTE "%s: " msg, p->p.name, args)
  50
  51 #define LOG_PKT_AUTH(msg, args...) \
  52   log_rl(&p->log_pkt_tbf, L_AUTH "%s: " msg, p->p.name, args)
  53
  54 #define LOG_PKT_WARN(msg, args...) \
  55   log_rl(&p->log_pkt_tbf, L_WARN "%s: " msg, p->p.name, args)
  56
  57 #define LOG_LSA1(msg, args...) \
  58   log_rl(&p->log_lsa_tbf, L_REMOTE "%s: " msg, p->p.name, args)
  59
  60 #define LOG_LSA2(msg, args...) \
  61   do { if (! p->log_lsa_tbf.drop) \
  62     log(L_REMOTE "%s: " msg, p->p.name, args); } while(0)
  63
  64
  65 #define OSPF_PROTO 89
  66
  67 #define LSREFRESHTIME           1800    /* 30 minutes */
  68 #define MINLSINTERVAL           (5 S_)
  69 #define MINLSARRIVAL            (1 S_)
  70 #define LSINFINITY              0xffffff
  71
  72 #define OSPF_PKT_TYPES          5       /* HELLO_P .. LSACK_P */
  73 #define OSPF3_CRYPTO_ID         1       /* OSPFv3 Cryptographic Protocol ID */
  74
  75 #define OSPF_DEFAULT_TICK 1
  76 #define OSPF_DEFAULT_STUB_COST 1000
  77 #define OSPF_DEFAULT_ECMP_LIMIT 16
  78 #define OSPF_DEFAULT_GR_TIME 120
  79 #define OSPF_DEFAULT_TRANSINT 40
  80
  81 #define OSPF_MIN_PKT_SIZE 256
  82 #define OSPF_MAX_PKT_SIZE 65535
  83
  84 #define OSPF_VLINK_ID_OFFSET 0x80000000
  85
  86 #define OSPF_GR_ABLE            1
  87 #define OSPF_GR_AWARE           2
  88
  89 struct ospf_config
  90 {
  91   struct proto_config c;
  92   uint tick;
  93   u8 ospf2;
  94   u8 af_ext;
  95   u8 af_mc;
  96   u8 rfc1583;
  97   u8 stub_router;
  98   u8 merge_external;
  99   u8 instance_id;
 100   u8 instance_id_set;
 101   u8 abr;
 102   u8 asbr;
 103   u8 vpn_pe;
 104   u8 gr_mode;                   /* Graceful restart mode (OSPF_GR_*) */
 105   uint gr_time;                 /* Graceful restart interval */
 106   uint ecmp;
 107   list area_list;               /* list of area configs (struct ospf_area_config) */
 108   list vlink_list;              /* list of configured vlinks (struct ospf_iface_patt) */
 109 };
 110
 111 struct ospf_area_config
 112 {
 113   node n;
 114   u32 areaid;
 115   u32 default_cost;             /* Cost of default route for stub areas
 116                                    (With possible LSA_EXT3_EBIT for NSSA areas) */
 117   u8 type;                      /* Area type (standard, stub, NSSA), represented
 118                                    by option flags (OPT_E, OPT_N) */
 119   u8 summary;                   /* Import summaries to this stub/NSSA area, valid for ABR */
 120   u8 default_nssa;              /* Generate default NSSA route for NSSA+summary area */
 121   u8 translator;                /* Translator role, for NSSA ABR */
 122   u32 transint;                 /* Translator stability interval */
 123   list patt_list;               /* List of iface configs (struct ospf_iface_patt) */
 124   list net_list;                /* List of aggregate networks for that area */
 125   list enet_list;               /* List of aggregate external (NSSA) networks */
 126   list stubnet_list;            /* List of stub networks added to Router LSA */
 127 };
 128
 129 struct area_net_config
 130 {
 131   node n;
 132   net_addr prefix;
 133   u32 tag;
 134   u8 hidden;
 135 };
 136
 137 struct area_net
 138 {
 139   u32 metric;                   /* With possible LSA_EXT3_EBIT for NSSA area nets */
 140   u32 tag;
 141   u8 hidden;
 142   u8 active;
 143   struct fib_node fn;
 144 };
 145
 146 struct ospf_stubnet_config
 147 {
 148   node n;
 149   net_addr prefix;
 150   u32 cost;
 151   u8 hidden;
 152   u8 summary;
 153 };
 154
 155 struct nbma_node
 156 {
 157   node n;
 158   ip_addr ip;
 159   byte eligible;
 160   byte found;
 161 };
 162
 163 struct ospf_iface_patt
 164 {
 165   struct iface_patt i;
 166   u32 type;
 167   u32 stub;
 168   u32 cost;
 169   u32 helloint;
 170   u32 rxmtint;
 171   u32 pollint;
 172   u32 waitint;
 173   u32 deadc;
 174   u32 deadint;
 175   u32 inftransdelay;
 176   list nbma_list;
 177   u32 priority;
 178   u32 voa;
 179   u32 vid;
 180   int tx_tos;
 181   int tx_priority;
 182   u16 tx_length;
 183   u16 rx_buffer;
 184 #define OSPF_RXBUF_MINSIZE 256  /* Minimal allowed size */
 185   u8 instance_id;
 186   u8 instance_id_set;
 187   u8 autype;                    /* OSPF_AUTH_*, not really used in OSPFv3 */
 188   u8 strictnbma;
 189   u8 check_link;
 190   u8 ecmp_weight;
 191   u8 link_lsa_suppression;
 192   u8 real_bcast;                /* Not really used in OSPFv3 */
 193   u8 ptp_netmask;               /* bool + 2 for unspecified */
 194   u8 ttl_security;              /* bool + 2 for TX only */
 195   u8 bfd;
 196   list *passwords;
 197 };
 198
 199 /* Default values for interface parameters */
 200 #define COST_D 10
 201 #define RXMTINT_D 5
 202 #define INFTRANSDELAY_D 1
 203 #define PRIORITY_D 1
 204 #define HELLOINT_D 10
 205 #define POLLINT_D 20
 206 #define DEADC_D 4
 207 #define WAIT_DMH 4
 208   /* Value of Wait timer - not found it in RFC * - using 4*HELLO */
 209
 210
 211
 212 struct ospf_proto
 213 {
 214   struct proto p;
 215   timer *disp_timer;            /* OSPF proto dispatcher */
 216   uint tick;
 217   struct top_graph *gr;         /* LSA graph */
 218   slist lsal;                   /* List of all LSA's */
 219   int calcrt;                   /* Routing table calculation scheduled?
 220                                    0=no, 1=normal, 2=forced reload */
 221   list iface_list;              /* List of OSPF interfaces (struct ospf_iface) */
 222   list area_list;               /* List of OSPF areas (struct ospf_area) */
 223   int areano;                   /* Number of area I belong to */
 224   int padj;                     /* Number of neighbors in Exchange or Loading state */
 225   int gr_count;                 /* Number of neighbors in graceful restart state */
 226   u8 gr_recovery;               /* Graceful restart recovery is active */
 227   u8 gr_cleanup;                /* GR cleanup scheduled */
 228   btime gr_timeout;             /* The end time of grace restart recovery */
 229   struct fib rtf;               /* Routing table */
 230   struct idm idm;               /* OSPFv3 LSA ID map */
 231   u8 ospf2;                     /* OSPF v2 or v3 */
 232   u8 af_ext;                    /* OSPFv3-AF extension */
 233   u8 af_mc;                     /* OSPFv3-AF multicast */
 234   u8 rfc1583;                   /* RFC1583 compatibility */
 235   u8 stub_router;               /* Do not forward transit traffic */
 236   u8 merge_external;            /* Should i merge external routes? */
 237   u8 instance_id;               /* Differentiate between more OSPF instances */
 238   u8 asbr;                      /* May i originate any ext/NSSA lsa? */
 239   u8 vpn_pe;                    /* Should we do VPN PE specific behavior (RFC 4577)? */
 240   u8 ecmp;                      /* Maximal number of nexthops in ECMP route, or 0 */
 241   u8 gr_mode;                   /* Graceful restart mode (OSPF_GR_*) */
 242   uint gr_time;                 /* Graceful restart interval */
 243   u64 csn64;                    /* Last used cryptographic sequence number */
 244   struct ospf_area *backbone;   /* If exists */
 245   event *flood_event;           /* Event for flooding LS updates */
 246   void *lsab;                   /* LSA buffer used when originating router LSAs */
 247   int lsab_size, lsab_used;
 248   linpool *nhpool;              /* Linpool used for next hops computed in SPF */
 249   sock *vlink_sk;               /* IP socket used for vlink TX */
 250   u32 router_id;
 251   u32 last_vlink_id;            /* Interface IDs for vlinks (starts at 0x80000000) */
 252   struct tbf log_pkt_tbf;       /* TBF for packet messages */
 253   struct tbf log_lsa_tbf;       /* TBF for LSA messages */
 254 };
 255
 256 struct ospf_area
 257 {
 258   node n;
 259   u32 areaid;
 260   struct ospf_area_config *ac;  /* Related area config */
 261   struct top_hash_entry *rt;    /* My own router LSA */
 262   struct top_hash_entry *pxr_lsa; /* Originated prefix LSA */
 263   list cand;                    /* List of candidates for RT calc. */
 264   struct fib net_fib;           /* Networks to advertise or not */
 265   struct fib enet_fib;          /* External networks for NSSAs */
 266   u32 options;                  /* Optional features */
 267   u8 update_rt_lsa;             /* Rt lsa origination scheduled? */
 268   u8 trcap;                     /* Transit capability? */
 269   u8 marked;                    /* Used in OSPF reconfigure */
 270   u8 translate;                 /* Translator state (TRANS_*), for NSSA ABR  */
 271   timer *translator_timer;      /* For NSSA translator switch */
 272   struct ospf_proto *po;
 273   struct fib rtr;               /* Routing tables for routers */
 274 };
 275
 276 struct ospf_iface
 277 {
 278   node n;
 279   struct iface *iface;          /* Nest's iface (NULL for vlinks) */
 280   struct ifa *addr;             /* IP prefix associated with that OSPF iface */
 281   struct ospf_area *oa;
 282   struct ospf_iface_patt *cf;
 283   char *ifname;                 /* Interface name (iface->name), new one for vlinks */
 284
 285   pool *pool;
 286   sock *sk;                     /* IP socket */
 287   list neigh_list;              /* List of neighbors (struct ospf_neighbor) */
 288   u32 cost;                     /* Cost of iface */
 289   u32 waitint;                  /* Number of seconds before changing state from wait */
 290   u32 rxmtint;                  /* Number of seconds between LSA retransmissions */
 291   u32 pollint;                  /* Poll interval in seconds */
 292   u32 deadint;                  /* After deadint seconds without hellos is router dead */
 293   u32 iface_id;                 /* Interface ID (iface->index or new value for vlinks) */
 294   u32 vid;                      /* ID of peer of virtual link */
 295   ip_addr vip;                  /* IP of peer of virtual link */
 296   struct ospf_iface *vifa;      /* OSPF iface which the vlink goes through */
 297   struct ospf_area *voa;        /* OSPF area which the vlink goes through */
 298   u16 inftransdelay;            /* The estimated number of seconds it takes to
 299                                    transmit a Link State Update Packet over this
 300                                    interface.  LSAs contained in the update */
 301   u16 helloint;                 /* number of seconds between hello sending */
 302   list *passwords;
 303   u32 csn;                      /* Last used crypt seq number */
 304   btime csn_use;                /* Last time when packet with that CSN was sent */
 305   ip_addr all_routers;          /* Multicast (or broadcast) address for all routers */
 306   ip_addr des_routers;          /* Multicast (or NULL) address for designated routers */
 307   ip_addr drip;                 /* Designated router IP */
 308   ip_addr bdrip;                /* Backup DR IP */
 309   u32 drid;                     /* DR Router ID */
 310   u32 bdrid;                    /* BDR Router ID */
 311   s16 rt_pos_beg;               /* Position of iface in Router-LSA, begin, inclusive */
 312   s16 rt_pos_end;               /* Position of iface in Router-LSA, end, exclusive */
 313   s16 px_pos_beg;               /* Position of iface in Rt Prefix-LSA, begin, inclusive */
 314   s16 px_pos_end;               /* Position of iface in Rt Prefix-LSA, end, exclusive */
 315   u32 dr_iface_id;              /* if drid is valid, this is iface_id of DR (for connecting network) */
 316   u8 instance_id;               /* Used to differentiate between more OSPF
 317                                    instances on one interface */
 318   u8 autype;                    /* Authentication type (OSPF_AUTH_*) */
 319   u8 type;                      /* OSPF view of type (OSPF_IT_*) */
 320   u8 strictnbma;                /* Can I talk with unknown neighbors? */
 321   u8 stub;                      /* Inactive interface */
 322   u8 state;                     /* Interface state machine (OSPF_IS_*) */
 323   timer *wait_timer;            /* WAIT timer */
 324   timer *hello_timer;           /* HELLOINT timer */
 325   timer *poll_timer;            /* Poll Interval - for NBMA */
 326
 327   struct top_hash_entry *link_lsa;      /* Originated link LSA */
 328   struct top_hash_entry *net_lsa;       /* Originated network LSA */
 329   struct top_hash_entry *pxn_lsa;       /* Originated prefix LSA */
 330   struct top_hash_entry **flood_queue;  /* LSAs queued for LSUPD */
 331   u8 update_link_lsa;
 332   u8 update_net_lsa;
 333   u16 flood_queue_used;         /* The current number of LSAs in flood_queue */
 334   u16 flood_queue_size;         /* The maximum number of LSAs in flood_queue */
 335   int fadj;                     /* Number of fully adjacent neighbors */
 336   list nbma_list;
 337   u8 priority;                  /* A router priority for DR election */
 338   u8 ioprob;
 339 #define OSPF_I_OK 0             /* Everything OK */
 340 #define OSPF_I_SK 1             /* Socket open failed */
 341 #define OSPF_I_LL 2             /* Missing link-local address (OSPFv3) */
 342   u8 sk_dr;                     /* Socket is a member of designated routers group */
 343   u8 marked;                    /* Used in OSPF reconfigure, 2 for force restart */
 344   u16 rxbuf;                    /* Buffer size */
 345   u16 tx_length;                /* Soft TX packet length limit, usually MTU */
 346   u16 tx_hdrlen;                /* Expected packet header length, less than tx_length */
 347   u8 check_link;                /* Whether iface link change is used */
 348   u8 ecmp_weight;               /* Weight used for ECMP */
 349   u8 link_lsa_suppression;      /* Suppression of Link-LSA origination */
 350   u8 ptp_netmask;               /* Send real netmask for P2P */
 351   u8 check_ttl;                 /* Check incoming packets for TTL 255 */
 352   u8 bfd;                       /* Use BFD on iface */
 353 };
 354
 355 struct ospf_neighbor
 356 {
 357   node n;
 358   pool *pool;
 359   struct ospf_iface *ifa;
 360   u8 state;
 361   u8 gr_active;                 /* We act as GR helper for the neighbor */
 362   u8 got_my_rt_lsa;             /* Received my Rt-LSA in DBDES exchanged */
 363   timer *inactim;               /* Inactivity timer */
 364   u8 imms;                      /* I, M, Master/slave received */
 365   u8 myimms;                    /* I, M Master/slave */
 366   u32 dds;                      /* DD Sequence number being sent */
 367   u32 ddr;                      /* last Dat Des packet received */
 368
 369   u32 rid;                      /* Router ID */
 370   ip_addr ip;                   /* IP of it's interface */
 371   u8 priority;                  /* Priority */
 372   u32 options;                  /* Options received */
 373
 374   /* Entries dr and bdr store IP addresses in OSPFv2 and router IDs in
 375      OSPFv3, we use the same type to simplify handling */
 376   u32 dr;                       /* Neighbor's idea of DR */
 377   u32 bdr;                      /* Neighbor's idea of BDR */
 378   u32 iface_id;                 /* ID of Neighbour's iface connected to common network */
 379
 380   /* Database summary list iterator, controls initial dbdes exchange.
 381    * Advances in the LSA list as dbdes packets are sent.
 382    */
 383   siterator dbsi;               /* iterator of po->lsal */
 384
 385   /* Link state request list, controls initial LSA exchange.
 386    * Entries added when received in dbdes packets, removed as sent in lsreq packets.
 387    */
 388   slist lsrql;                  /* slist of struct top_hash_entry from n->lsrqh */
 389   struct top_graph *lsrqh;
 390   struct top_hash_entry *lsrqi; /* Pointer to the first unsent node in lsrql */
 391
 392   /* Link state retransmission list, controls LSA retransmission during flood.
 393    * Entries added as sent in lsupd packets, removed when received in lsack packets.
 394    * These entries hold ret_count in appropriate LSA entries.
 395    */
 396   slist lsrtl;                  /* slist of struct top_hash_entry from n->lsrth */
 397   struct top_graph *lsrth;
 398   timer *dbdes_timer;           /* DBDES exchange timer */
 399   timer *lsrq_timer;            /* LSA request timer */
 400   timer *lsrt_timer;            /* LSA retransmission timer */
 401   list ackl[2];
 402 #define ACKL_DIRECT 0
 403 #define ACKL_DELAY 1
 404   timer *ackd_timer;            /* Delayed ack timer */
 405   timer *gr_timer;              /* Graceful restart timer, non-NULL only if gr_active */
 406   struct bfd_request *bfd_req;  /* BFD request, if BFD is used */
 407   void *ldd_buffer;             /* Last database description packet */
 408   u32 ldd_bsize;                /* Buffer size for ldd_buffer */
 409   u32 csn;                      /* OSPFv2: Last received crypt seq number */
 410   u64 csn64[OSPF_PKT_TYPES];    /* OSPFv3: Last received CSN for each type of packet */
 411 };
 412
 413
 414 /* OSPF interface types */
 415 #define OSPF_IT_BCAST   0
 416 #define OSPF_IT_NBMA    1
 417 #define OSPF_IT_PTP     2
 418 #define OSPF_IT_PTMP    3
 419 #define OSPF_IT_VLINK   4
 420 #define OSPF_IT_UNDEF   5
 421
 422 /* OSPF interface states */
 423 #define OSPF_IS_DOWN    0       /* Not active */
 424 #define OSPF_IS_LOOP    1       /* Iface with no link */
 425 #define OSPF_IS_WAITING 2       /* Waiting for Wait timer */
 426 #define OSPF_IS_PTP     3       /* PTP operational */
 427 #define OSPF_IS_DROTHER 4       /* I'm on BCAST or NBMA and I'm not DR */
 428 #define OSPF_IS_BACKUP  5       /* I'm BDR */
 429 #define OSPF_IS_DR      6       /* I'm DR */
 430
 431 /* Definitions for interface state machine */
 432 #define ISM_UP          0       /* Interface Up */
 433 #define ISM_WAITF       1       /* Wait timer fired */
 434 #define ISM_BACKS       2       /* Backup seen */
 435 #define ISM_NEICH       3       /* Neighbor change */
 436 #define ISM_LOOP        4       /* Link down */
 437 #define ISM_UNLOOP      5       /* Link up */
 438 #define ISM_DOWN        6       /* Interface down */
 439
 440 /* OSPF authentication types */
 441 #define OSPF_AUTH_NONE  0
 442 #define OSPF_AUTH_SIMPLE 1
 443 #define OSPF_AUTH_CRYPT 2
 444
 445 #define OSPF3_AUTH_HMAC 1       /* HMAC Cryptographic Authentication */
 446
 447 /* OSPF neighbor states */
 448 #define NEIGHBOR_DOWN   0
 449 #define NEIGHBOR_ATTEMPT 1
 450 #define NEIGHBOR_INIT   2
 451 #define NEIGHBOR_2WAY   3
 452 #define NEIGHBOR_EXSTART 4
 453 #define NEIGHBOR_EXCHANGE 5
 454 #define NEIGHBOR_LOADING 6
 455 #define NEIGHBOR_FULL   7
 456
 457 /* Definitions for neighbor state machine */
 458 #define INM_HELLOREC    0       /* Hello Received */
 459 #define INM_START       1       /* Neighbor start - for NBMA */
 460 #define INM_2WAYREC     2       /* 2-Way received */
 461 #define INM_NEGDONE     3       /* Negotiation done */
 462 #define INM_EXDONE      4       /* Exchange done */
 463 #define INM_BADLSREQ    5       /* Bad LS Request */
 464 #define INM_LOADDONE    6       /* Load done */
 465 #define INM_ADJOK       7       /* AdjOK? */
 466 #define INM_SEQMIS      8       /* Sequence number mismatch */
 467 #define INM_1WAYREC     9       /* 1-Way */
 468 #define INM_KILLNBR     10      /* Kill Neighbor */
 469 #define INM_INACTTIM    11      /* Inactivity timer */
 470 #define INM_LLDOWN      12      /* Line down */
 471
 472 #define TRANS_OFF       0
 473 #define TRANS_ON        1
 474 #define TRANS_WAIT      2       /* Waiting before the end of translation */
 475
 476
 477 /* Generic option flags */
 478 #define OPT_V6          0x0001  /* OSPFv3, LSA relevant for IPv6 routing calculation */
 479 #define OPT_E           0x0002  /* Related to AS-external LSAs */
 480 #define OPT_MC          0x0004  /* Related to MOSPF, not used and obsolete */
 481 #define OPT_N           0x0008  /* Related to NSSA */
 482 #define OPT_P           0x0008  /* OSPFv2, flags P and N share position, see NSSA RFC */
 483 #define OPT_L_V2        0x0010  /* OSPFv2, link-local signaling, not used */
 484 #define OPT_R           0x0010  /* OSPFv3, originator is active router */
 485 #define OPT_DC          0x0020  /* Related to demand circuits, not used */
 486 #define OPT_O           0x0040  /* OSPFv2 Opaque LSA (RFC 5250) */
 487 #define OPT_DN          0x0080  /* OSPFv2 VPN loop prevention (RFC 4576)*/
 488 #define OPT_AF          0x0100  /* OSPFv3 Address Families (RFC 5838) */
 489 #define OPT_L_V3        0x0200  /* OSPFv3, link-local signaling */
 490 #define OPT_AT          0x0400  /* OSPFv3, authentication trailer */
 491
 492 /* Router-LSA VEB flags are are stored together with links (OSPFv2) or options (OSPFv3) */
 493 #define OPT_RT_B        (0x01 << 24)
 494 #define OPT_RT_E        (0x02 << 24)
 495 #define OPT_RT_V        (0x04 << 24)
 496 #define OPT_RT_NT       (0x10 << 24)
 497
 498 /* Prefix flags, specific for OSPFv3 */
 499 #define OPT_PX_NU       0x01
 500 #define OPT_PX_LA       0x02
 501 #define OPT_PX_P        0x08
 502 #define OPT_PX_DN       0x10
 503
 504
 505 struct ospf_packet
 506 {
 507   u8 version;
 508   u8 type;
 509   u16 length;
 510   u32 routerid;
 511   u32 areaid;
 512   u16 checksum;
 513   u8 instance_id;               /* See RFC 6549 */
 514   u8 autype;                    /* Undefined for OSPFv3 */
 515 };
 516
 517 struct ospf_lls
 518 {
 519   u16 checksum;
 520   u16 length;
 521   byte data[0];
 522 };
 523
 524 struct ospf_auth_crypto
 525 {
 526   u16 zero;
 527   u8 keyid;
 528   u8 len;
 529   u32 csn;                      /* Cryptographic sequence number (32-bit) */
 530 };
 531
 532 union ospf_auth2
 533 {
 534   u8 password[8];
 535   struct ospf_auth_crypto c32;
 536 };
 537
 538 struct ospf_auth3
 539 {
 540   u16 type;                     /* Authentication type (OSPF3_AUTH_*) */
 541   u16 length;                   /* Authentication trailer length (header + data) */
 542   u16 reserved;
 543   u16 sa_id;                    /* Security association identifier (key_id) */
 544   u64 csn;                      /* Cryptographic sequence number (64-bit) */
 545   byte data[0];                 /* Authentication data */
 546 };
 547
 548
 549 /* Packet types */
 550 #define HELLO_P         1       /* Hello */
 551 #define DBDES_P         2       /* Database description */
 552 #define LSREQ_P         3       /* Link state request */
 553 #define LSUPD_P         4       /* Link state update */
 554 #define LSACK_P         5       /* Link state acknowledgement */
 555
 556
 557 #define DBDES_I         4       /* Init bit */
 558 #define DBDES_M         2       /* More bit */
 559 #define DBDES_MS        1       /* Master/Slave bit */
 560 #define DBDES_IMMS      (DBDES_I | DBDES_M | DBDES_MS)
 561
 562
 563 /* OSPFv3 LSA Types / LSA Function Codes */
 564 /* https://www.iana.org/assignments/ospfv3-parameters/ospfv3-parameters.xhtml#ospfv3-parameters-3 */
 565 #define LSA_T_RT                0x2001
 566 #define LSA_T_NET               0x2002
 567 #define LSA_T_SUM_NET           0x2003
 568 #define LSA_T_SUM_RT            0x2004
 569 #define LSA_T_EXT               0x4005
 570 #define LSA_T_NSSA              0x2007
 571 #define LSA_T_LINK              0x0008
 572 #define LSA_T_PREFIX            0x2009
 573 #define LSA_T_GR                0x000B
 574 #define LSA_T_RI_               0x000C
 575 #define LSA_T_RI_LINK           0x800C
 576 #define LSA_T_RI_AREA           0xA00C
 577 #define LSA_T_RI_AS             0xC00C
 578 #define LSA_T_OPAQUE_           0x1FFF
 579 #define LSA_T_OPAQUE_LINK       0x9FFF
 580 #define LSA_T_OPAQUE_AREA       0xBFFF
 581 #define LSA_T_OPAQUE_AS         0xDFFF
 582
 583 #define LSA_T_V2_OPAQUE_        0x0009
 584 #define LSA_T_V2_MASK           0x00ff
 585
 586 /* OSPFv2 Opaque LSA Types */
 587 /* https://www.iana.org/assignments/ospf-opaque-types/ospf-opaque-types.xhtml#ospf-opaque-types-2 */
 588 #define LSA_OT_GR               0x03
 589 #define LSA_OT_RI               0x04
 590
 591 #define LSA_FUNCTION_MASK       0x1FFF
 592 #define LSA_FUNCTION(type)      ((type) & LSA_FUNCTION_MASK)
 593
 594 #define LSA_UBIT                0x8000
 595
 596 #define LSA_SCOPE_LINK          0x0000
 597 #define LSA_SCOPE_AREA          0x2000
 598 #define LSA_SCOPE_AS            0x4000
 599 #define LSA_SCOPE_RES           0x6000
 600 #define LSA_SCOPE_MASK          0x6000
 601 #define LSA_SCOPE(type)         ((type) & LSA_SCOPE_MASK)
 602 #define LSA_SCOPE_ORDER(type)   (((type) >> 13) & 0x3)
 603
 604
 605 #define LSA_MAXAGE      3600    /* 1 hour */
 606 #define LSA_CHECKAGE    300     /* 5 minutes */
 607 #define LSA_MAXAGEDIFF  900     /* 15 minutes */
 608
 609 #define LSA_ZEROSEQNO   ((s32) 0x80000000)
 610 #define LSA_INITSEQNO   ((s32) 0x80000001)
 611 #define LSA_MAXSEQNO    ((s32) 0x7fffffff)
 612
 613 #define LSA_METRIC_MASK  0x00FFFFFF
 614 #define LSA_OPTIONS_MASK 0x00FFFFFF
 615
 616
 617 #define LSART_PTP       1
 618 #define LSART_NET       2
 619 #define LSART_STUB      3
 620 #define LSART_VLNK      4
 621
 622 #define LSA_RT2_LINKS   0x0000FFFF
 623
 624 #define LSA_SUM2_TOS    0xFF000000
 625
 626 #define LSA_EXT2_TOS    0x7F000000
 627 #define LSA_EXT2_EBIT   0x80000000
 628
 629 #define LSA_EXT3_EBIT   0x04000000
 630 #define LSA_EXT3_FBIT   0x02000000
 631 #define LSA_EXT3_TBIT   0x01000000
 632
 633 /* OSPF Grace LSA (GR) TLVs */
 634 /* https://www.iana.org/assignments/ospfv2-parameters/ospfv2-parameters.xhtml#ospfv2-parameters-13 */
 635 #define LSA_GR_PERIOD           1
 636 #define LSA_GR_REASON           2
 637 #define LSA_GR_ADDRESS          3
 638
 639 /* OSPF Router Information (RI) TLVs */
 640 /* https://www.iana.org/assignments/ospf-parameters/ospf-parameters.xhtml#ri-tlv */
 641 #define LSA_RI_RIC              1
 642 #define LSA_RI_RFC              2
 643
 644 /* OSPF Router Informational Capability Bits */
 645 /* https://www.iana.org/assignments/ospf-parameters/ospf-parameters.xhtml#router-informational-capability */
 646 #define LSA_RIC_GR_CAPABLE      0
 647 #define LSA_RIC_GR_HELPER       1
 648 #define LSA_RIC_STUB_ROUTER     2
 649
 650
 651 struct ospf_lsa_header
 652 {
 653   u16 age;                      /* LS Age */
 654   u16 type_raw;                 /* Type, mixed with options on OSPFv2 */
 655
 656   u32 id;
 657   u32 rt;                       /* Advertising router */
 658   s32 sn;                       /* LS Sequence number */
 659   u16 checksum;
 660   u16 length;
 661 };
 662
 663
 664 /* In OSPFv2, options are embedded in higher half of type_raw */
 665 static inline u8 lsa_get_options(struct ospf_lsa_header *lsa)
 666 { return lsa->type_raw >> 8; }
 667
 668 static inline void lsa_set_options(struct ospf_lsa_header *lsa, u16 options)
 669 { lsa->type_raw = (lsa->type_raw & 0xff) | (options << 8); }
 670
 671
 672 struct ospf_lsa_rt
 673 {
 674   u32 options;  /* VEB flags, mixed with link count for OSPFv2 and options for OSPFv3 */
 675 };
 676
 677 struct ospf_lsa_rt2_link
 678 {
 679   u32 id;
 680   u32 data;
 681 #ifdef CPU_BIG_ENDIAN
 682   u8 type;
 683   u8 no_tos;
 684   u16 metric;
 685 #else
 686   u16 metric;
 687   u8 no_tos;
 688   u8 type;
 689 #endif
 690 };
 691
 692 struct ospf_lsa_rt2_tos
 693 {
 694 #ifdef CPU_BIG_ENDIAN
 695   u8 tos;
 696   u8 padding;
 697   u16 metric;
 698 #else
 699   u16 metric;
 700   u8 padding;
 701   u8 tos;
 702 #endif
 703 };
 704
 705 struct ospf_lsa_rt3_link
 706 {
 707 #ifdef CPU_BIG_ENDIAN
 708   u8 type;
 709   u8 padding;
 710   u16 metric;
 711 #else
 712   u16 metric;
 713   u8 padding;
 714   u8 type;
 715 #endif
 716   u32 lif;      /* Local interface ID */
 717   u32 nif;      /* Neighbor interface ID */
 718   u32 id;       /* Neighbor router ID */
 719 };
 720
 721
 722 struct ospf_lsa_net
 723 {
 724   u32 optx;     /* Netmask for OSPFv2, options for OSPFv3 */
 725   u32 routers[];
 726 };
 727
 728 struct ospf_lsa_sum2
 729 {
 730   u32 netmask;
 731   u32 metric;
 732 };
 733
 734 struct ospf_lsa_sum3_net
 735 {
 736   u32 metric;
 737   u32 prefix[];
 738 };
 739
 740 struct ospf_lsa_sum3_rt
 741 {
 742   u32 options;
 743   u32 metric;
 744   u32 drid;
 745 };
 746
 747 struct ospf_lsa_ext2
 748 {
 749   u32 netmask;
 750   u32 metric;
 751   u32 fwaddr;
 752   u32 tag;
 753 };
 754
 755 struct ospf_lsa_ext3
 756 {
 757   u32 metric;
 758   u32 rest[];
 759 };
 760
 761 struct ospf_lsa_ext_local
 762 {
 763   net_addr net;
 764   ip_addr fwaddr;
 765   u32 metric, ebit, fbit, tag, propagate, downwards;
 766   u8 pxopts;
 767 };
 768
 769 struct ospf_lsa_link
 770 {
 771   u32 options;
 772   ip6_addr lladdr;
 773   u32 pxcount;
 774   u32 rest[];
 775 };
 776
 777 struct ospf_lsa_prefix
 778 {
 779 #ifdef CPU_BIG_ENDIAN
 780   u16 pxcount;
 781   u16 ref_type;
 782 #else
 783   u16 ref_type;
 784   u16 pxcount;
 785 #endif
 786   u32 ref_id;
 787   u32 ref_rt;
 788   u32 rest[];
 789 };
 790
 791 struct ospf_tlv
 792 {
 793 #ifdef CPU_BIG_ENDIAN
 794   u16 type;
 795   u16 length;
 796 #else
 797   u16 length;
 798   u16 type;
 799 #endif
 800   u32 data[];
 801 };
 802
 803
 804 static inline uint
 805 lsa_net_count(struct ospf_lsa_header *lsa)
 806 {
 807   return (lsa->length - sizeof(struct ospf_lsa_header) - sizeof(struct ospf_lsa_net))
 808     / sizeof(u32);
 809 }
 810
 811 /* In ospf_area->rtr we store paths to routers, but we use RID (and not IP address)
 812    as index, so we need to encapsulate RID to IP address */
 813
 814 #define net_from_rid(x) NET_ADDR_IP4(ip4_from_u32(x), IP4_MAX_PREFIX_LENGTH)
 815 #define rid_from_net(x) ip4_to_u32(((net_addr_ip4 *) x)->prefix)
 816
 817 #define IPV6_PREFIX_SPACE(x) ((((x) + 63) / 32) * 4)
 818 #define IPV6_PREFIX_WORDS(x) (((x) + 63) / 32)
 819
 820
 821 static inline int
 822 ospf_valid_prefix(net_addr *n)
 823 {
 824   /*
 825    * In OSPFv2, prefix is stored as netmask; ip4_masklen() returns 255 for
 826    * invalid one. But OSPFv3-AF may receive IPv4 net with 32 < pxlen < 128.
 827    */
 828   uint max = (n->type == NET_IP4) ? IP4_MAX_PREFIX_LENGTH : IP6_MAX_PREFIX_LENGTH;
 829   return n->pxlen <= max;
 830 }
 831
 832 /*
 833  * In OSPFv3-AF (RFC 5835), IPv4 address is encoded by just placing it in the
 834  * first 32 bits of IPv6 address and setting remaining bits to zero. Likewise
 835  * for IPv4 prefix, where remaining bits do not matter. We use following
 836  * functions to convert between IPv4 and IPv4-in-IPv6 representations:
 837  */
 838
 839 static inline ip4_addr ospf3_6to4(ip6_addr a)
 840 { return _MI4(_I0(a)); }
 841
 842 static inline ip6_addr ospf3_4to6(ip4_addr a)
 843 { return _MI6(_I(a), 0, 0, 0); }
 844
 845
 846 static inline u32 *
 847 ospf3_get_prefix(u32 *buf, int af, net_addr *n, u8 *pxopts, u16 *rest)
 848 {
 849   ip6_addr px = IP6_NONE;
 850   uint pxlen = (*buf >> 24);
 851   *pxopts = (*buf >> 16) & 0xff;
 852   if (rest) *rest = *buf & 0xffff;
 853   buf++;
 854
 855   if (pxlen > 0)
 856     _I0(px) = *buf++;
 857   if (pxlen > 32)
 858     _I1(px) = *buf++;
 859   if (pxlen > 64)
 860     _I2(px) = *buf++;
 861   if (pxlen > 96)
 862     _I3(px) = *buf++;
 863
 864   /* Clean up remaining bits */
 865   if (pxlen < 128)
 866     px.addr[pxlen / 32] &= u32_mkmask(pxlen % 32);
 867
 868   if (af == NET_IP4)
 869     net_fill_ip4(n, ospf3_6to4(px), pxlen);
 870   else
 871     net_fill_ip6(n, px, pxlen);
 872
 873   return buf;
 874 }
 875
 876 static inline u32 *
 877 ospf3_put_prefix(u32 *buf, net_addr *n, u8 pxopts, u16 rest)
 878 {
 879   ip6_addr px = (n->type == NET_IP4) ? ospf3_4to6(net4_prefix(n)) : net6_prefix(n);
 880   uint pxlen = n->pxlen;
 881
 882   *buf++ = ((pxlen << 24) | (pxopts << 16) | rest);
 883
 884   if (pxlen > 0)
 885     *buf++ = _I0(px);
 886   if (pxlen > 32)
 887     *buf++ = _I1(px);
 888   if (pxlen > 64)
 889     *buf++ = _I2(px);
 890   if (pxlen > 96)
 891     *buf++ = _I3(px);
 892
 893   return buf;
 894 }
 895
 896 static inline u32 *
 897 ospf3_get_addr(u32 *buf, int af, ip_addr *addr)
 898 {
 899   ip6_addr a;
 900   memcpy(&a, buf, 16);
 901   *addr = (af == NET_IP4) ? ipa_from_ip4(ospf3_6to4(a)) : ipa_from_ip6(a);
 902   return buf + 4;
 903 }
 904
 905 static inline u32 *
 906 ospf3_put_addr(u32 *buf, ip_addr addr)
 907 {
 908   ip6_addr a = ipa_is_ip4(addr) ? ospf3_4to6(ipa_to_ip4(addr)) : ipa_to_ip6(addr);
 909   memcpy(buf, &a, 16);
 910   return buf + 4;
 911 }
 912
 913
 914 struct ospf_lsreq_header
 915 {
 916   u32 type;
 917   u32 id;
 918   u32 rt;
 919 };
 920
 921
 922
 923 #define SH_ROUTER_SELF 0xffffffff
 924
 925 struct lsadb_show_data {
 926   struct symbol *name;  /* Protocol to request data from */
 927   u16 type;             /* LSA Type, 0 -> all */
 928   u16 scope;            /* Scope, 0 -> all, hack to handle link scope as 1 */
 929   u32 area;             /* Specified for area scope */
 930   u32 lsid;             /* LSA ID, 0 -> all */
 931   u32 router;           /* Advertising router, 0 -> all */
 932 };
 933
 934
 935 #define EA_OSPF_METRIC1 EA_CODE(PROTOCOL_OSPF, 0)
 936 #define EA_OSPF_METRIC2 EA_CODE(PROTOCOL_OSPF, 1)
 937 #define EA_OSPF_TAG     EA_CODE(PROTOCOL_OSPF, 2)
 938 #define EA_OSPF_ROUTER_ID EA_CODE(PROTOCOL_OSPF, 3)
 939
 940
 941 /* ospf.c */
 942 void ospf_schedule_rtcalc(struct ospf_proto *p);
 943
 944 static inline void ospf_notify_rt_lsa(struct ospf_area *oa)
 945 { oa->update_rt_lsa = 1; }
 946
 947 static inline void ospf_notify_net_lsa(struct ospf_iface *ifa)
 948 { ifa->update_net_lsa = 1; }
 949
 950 static inline void ospf_notify_link_lsa(struct ospf_iface *ifa)
 951 { ifa->update_link_lsa = 1; }
 952
 953 static inline int ospf_is_v2(struct ospf_proto *p)
 954 { return p->ospf2; }
 955
 956 static inline int ospf_is_v3(struct ospf_proto *p)
 957 { return ! p->ospf2; }
 958
 959 static inline int ospf_get_version(struct ospf_proto *p)
 960 { return ospf_is_v2(p) ? 2 : 3; }
 961
 962 static inline int ospf_is_ip4(struct ospf_proto *p)
 963 { return p->p.net_type == NET_IP4; }
 964
 965 static inline int ospf_is_ip6(struct ospf_proto *p)
 966 { return p->p.net_type == NET_IP6; }
 967
 968 static inline int ospf_get_af(struct ospf_proto *p)
 969 { return p->p.net_type; }
 970
 971 struct ospf_area *ospf_find_area(struct ospf_proto *p, u32 aid);
 972
 973 static inline struct ospf_area *ospf_main_area(struct ospf_proto *p)
 974 { return (p->areano == 1) ? HEAD(p->area_list) : p->backbone; }
 975
 976 static inline int oa_is_stub(struct ospf_area *oa)
 977 { return (oa->options & (OPT_E | OPT_N)) == 0; }
 978
 979 static inline int oa_is_ext(struct ospf_area *oa)
 980 { return oa->options & OPT_E; }
 981
 982 static inline int oa_is_nssa(struct ospf_area *oa)
 983 { return oa->options & OPT_N; }
 984
 985 void ospf_stop_gr_recovery(struct ospf_proto *p);
 986
 987 void ospf_sh_neigh(struct proto *P, char *iff);
 988 void ospf_sh(struct proto *P);
 989 void ospf_sh_iface(struct proto *P, char *iff);
 990 void ospf_sh_state(struct proto *P, int verbose, int reachable);
 991
 992 void ospf_sh_lsadb(struct lsadb_show_data *ld);
 993
 994 /* iface.c */
 995 void ospf_iface_chstate(struct ospf_iface *ifa, u8 state);
 996 void ospf_iface_sm(struct ospf_iface *ifa, int event);
 997 struct ospf_iface *ospf_iface_find(struct ospf_proto *p, struct iface *what);
 998 void ospf_if_notify(struct proto *P, uint flags, struct iface *iface);
 999 void ospf_ifa_notify2(struct proto *P, uint flags, struct ifa *a);
1000 void ospf_ifa_notify3(struct proto *P, uint flags, struct ifa *a);
1001 void ospf_iface_info(struct ospf_iface *ifa);
1002 void ospf_iface_new(struct ospf_area *oa, struct ifa *addr, struct ospf_iface_patt *ip);
1003 void ospf_iface_new_vlink(struct ospf_proto *p, struct ospf_iface_patt *ip);
1004 void ospf_iface_remove(struct ospf_iface *ifa);
1005 void ospf_iface_shutdown(struct ospf_iface *ifa);
1006 int ospf_iface_assure_bufsize(struct ospf_iface *ifa, uint plen);
1007 int ospf_iface_reconfigure(struct ospf_iface *ifa, struct ospf_iface_patt *new);
1008 void ospf_reconfigure_ifaces(struct ospf_proto *p);
1009 void ospf_open_vlink_sk(struct ospf_proto *p);
1010 struct nbma_node *find_nbma_node_(list *nnl, ip_addr ip);
1011
1012 static inline struct nbma_node * find_nbma_node(struct ospf_iface *ifa, ip_addr ip)
1013 { return find_nbma_node_(&ifa->nbma_list, ip); }
1014
1015 /* neighbor.c */
1016 struct ospf_neighbor *ospf_neighbor_new(struct ospf_iface *ifa);
1017 void ospf_neigh_sm(struct ospf_neighbor *n, int event);
1018 void ospf_neigh_cancel_graceful_restart(struct ospf_neighbor *n);
1019 void ospf_neigh_notify_grace_lsa(struct ospf_neighbor *n, struct top_hash_entry *en);
1020 void ospf_neigh_lsadb_changed_(struct ospf_proto *p, struct top_hash_entry *en);
1021 void ospf_dr_election(struct ospf_iface *ifa);
1022 struct ospf_neighbor *find_neigh(struct ospf_iface *ifa, u32 rid);
1023 struct ospf_neighbor *find_neigh_by_ip(struct ospf_iface *ifa, ip_addr ip);
1024 void ospf_neigh_update_bfd(struct ospf_neighbor *n, int use_bfd);
1025 void ospf_sh_neigh_info(struct ospf_neighbor *n);
1026
1027 static inline void ospf_neigh_lsadb_changed(struct ospf_proto *p, struct top_hash_entry *en)
1028 { if (p->gr_count) ospf_neigh_lsadb_changed_(p, en); }
1029
1030 /* packet.c */
1031 void ospf_pkt_fill_hdr(struct ospf_iface *ifa, void *buf, u8 h_type);
1032 int ospf_rx_hook(sock * sk, uint size);
1033 // void ospf_tx_hook(sock * sk);
1034 void ospf_err_hook(sock * sk, int err);
1035 void ospf_verr_hook(sock *sk, int err);
1036 void ospf_send_to(struct ospf_iface *ifa, ip_addr ip);
1037 void ospf_send_to_agt(struct ospf_iface *ifa, u8 state);
1038 void ospf_send_to_bdr(struct ospf_iface *ifa);
1039
1040 static inline uint ospf_pkt_maxsize(struct ospf_iface *ifa)
1041 { return ifa->tx_length - ifa->tx_hdrlen; }
1042
1043 static inline void ospf_send_to_all(struct ospf_iface *ifa)
1044 { ospf_send_to(ifa, ifa->all_routers); }
1045
1046 static inline void ospf_send_to_des(struct ospf_iface *ifa)
1047 {
1048   if (ipa_nonzero(ifa->des_routers))
1049     ospf_send_to(ifa, ifa->des_routers);
1050   else
1051     ospf_send_to_bdr(ifa);
1052 }
1053
1054 #ifndef PARSER
1055 #define DROP(DSC,VAL) do { err_dsc = DSC; err_val = VAL; goto drop; } while(0)
1056 #define DROP1(DSC) do { err_dsc = DSC; goto drop; } while(0)
1057 #define SKIP(DSC) do { err_dsc = DSC; goto skip; } while(0)
1058 #endif
1059
1060 static inline uint ospf_pkt_hdrlen(struct ospf_proto *p)
1061 { return ospf_is_v2(p) ? (sizeof(struct ospf_packet) + sizeof(union ospf_auth2)) : sizeof(struct ospf_packet); }
1062
1063 static inline void * ospf_tx_buffer(struct ospf_iface *ifa)
1064 { return ifa->sk->tbuf; }
1065
1066 /* hello.c */
1067 #define OHS_HELLO    0
1068 #define OHS_POLL     1
1069 #define OHS_SHUTDOWN 2
1070
1071 void ospf_send_hello(struct ospf_iface *ifa, int kind, struct ospf_neighbor *dirn);
1072 void ospf_receive_hello(struct ospf_packet *pkt, struct ospf_iface *ifa, struct ospf_neighbor *n, ip_addr faddr);
1073 uint ospf_hello3_options(struct ospf_packet *pkt);
1074
1075 /* dbdes.c */
1076 void ospf_send_dbdes(struct ospf_proto *p, struct ospf_neighbor *n);
1077 void ospf_rxmt_dbdes(struct ospf_proto *p, struct ospf_neighbor *n);
1078 void ospf_reset_ldd(struct ospf_proto *p, struct ospf_neighbor *n);
1079 void ospf_receive_dbdes(struct ospf_packet *pkt, struct ospf_iface *ifa, struct ospf_neighbor *n);
1080 uint ospf_dbdes3_options(struct ospf_packet *pkt);
1081
1082 /* lsreq.c */
1083 void ospf_send_lsreq(struct ospf_proto *p, struct ospf_neighbor *n);
1084 void ospf_receive_lsreq(struct ospf_packet *pkt, struct ospf_iface *ifa, struct ospf_neighbor *n);
1085
1086 /* lsupd.c */
1087 void ospf_dump_lsahdr(struct ospf_proto *p, struct ospf_lsa_header *lsa_n);
1088 void ospf_dump_common(struct ospf_proto *p, struct ospf_packet *pkt);
1089 void ospf_lsa_lsrt_down_(struct top_hash_entry *en, struct ospf_neighbor *n, struct top_hash_entry *ret);
1090 void ospf_add_flushed_to_lsrt(struct ospf_proto *p, struct ospf_neighbor *n);
1091 void ospf_flood_event(void *ptr);
1092 int ospf_flood_lsa(struct ospf_proto *p, struct top_hash_entry *en, struct ospf_neighbor *from);
1093 int ospf_send_lsupd(struct ospf_proto *p, struct top_hash_entry **lsa_list, uint lsa_count, struct ospf_neighbor *n);
1094 void ospf_rxmt_lsupd(struct ospf_proto *p, struct ospf_neighbor *n);
1095 void ospf_receive_lsupd(struct ospf_packet *pkt, struct ospf_iface *ifa, struct ospf_neighbor *n);
1096
1097 /* lsack.c */
1098 void ospf_enqueue_lsack(struct ospf_neighbor *n, struct ospf_lsa_header *h_n, int queue);
1099 void ospf_reset_lsack_queue(struct ospf_neighbor *n);
1100 void ospf_send_lsack(struct ospf_proto *p, struct ospf_neighbor *n, int queue);
1101 void ospf_receive_lsack(struct ospf_packet *pkt, struct ospf_iface *ifa, struct ospf_neighbor *n);
1102
1103
1104 #include "proto/ospf/rt.h"
1105 #include "proto/ospf/topology.h"
1106 #include "proto/ospf/lsalib.h"
1107
1108 #endif /* _BIRD_OSPF_H_ */