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/ip.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: #ifdef IPV6
41: #define OSPF_IS_V2 0
42: #else
43: #define OSPF_IS_V2 1
44: #endif
45:
46: // FIXME: MAX_PREFIX_LENGTH
47:
48: #define OSPF_TRACE(flags, msg, args...) \
49: do { if ((p->p.debug & flags) || OSPF_FORCE_DEBUG) \
50: log(L_TRACE "%s: " msg, p->p.name , ## args ); } while(0)
51:
52: #define OSPF_PACKET(dumpfn, buffer, msg, args...) \
53: do { if ((p->p.debug & D_PACKETS) || OSPF_FORCE_DEBUG) \
54: { log(L_TRACE "%s: " msg, p->p.name, ## args ); dumpfn(p, buffer); } } while(0)
55:
56: #define LOG_PKT(msg, args...) \
57: log_rl(&p->log_pkt_tbf, L_REMOTE "%s: " msg, p->p.name, args)
58:
59: #define LOG_PKT_AUTH(msg, args...) \
60: log_rl(&p->log_pkt_tbf, L_AUTH "%s: " msg, p->p.name, args)
61:
62: #define LOG_PKT_WARN(msg, args...) \
63: log_rl(&p->log_pkt_tbf, L_WARN "%s: " msg, p->p.name, args)
64:
65: #define LOG_LSA1(msg, args...) \
66: log_rl(&p->log_lsa_tbf, L_REMOTE "%s: " msg, p->p.name, args)
67:
68: #define LOG_LSA2(msg, args...) \
69: do { if (! p->log_lsa_tbf.mark) \
70: log(L_REMOTE "%s: " msg, p->p.name, args); } while(0)
71:
72:
73: #define OSPF_PROTO 89
74:
75: #define LSREFRESHTIME 1800 /* 30 minutes */
76: #define MINLSINTERVAL 5
77: #define MINLSARRIVAL 1
78: #define LSINFINITY 0xffffff
79:
80: #define OSPF_DEFAULT_TICK 1
81: #define OSPF_DEFAULT_STUB_COST 1000
82: #define OSPF_DEFAULT_ECMP_LIMIT 16
83: #define OSPF_DEFAULT_TRANSINT 40
84:
85: #define OSPF_MIN_PKT_SIZE 256
86: #define OSPF_MAX_PKT_SIZE 65535
87:
88: #define OSPF_VLINK_ID_OFFSET 0x80000000
89:
90:
91: struct ospf_config
92: {
93: struct proto_config c;
94: uint tick;
95: u8 ospf2;
96: u8 rfc1583;
97: u8 stub_router;
98: u8 merge_external;
99: u8 instance_id;
100: u8 abr;
101: u8 asbr;
102: int ecmp;
103: list area_list; /* list of area configs (struct ospf_area_config) */
104: list vlink_list; /* list of configured vlinks (struct ospf_iface_patt) */
105: };
106:
107: struct ospf_area_config
108: {
109: node n;
110: u32 areaid;
111: u32 default_cost; /* Cost of default route for stub areas
112: (With possible LSA_EXT3_EBIT for NSSA areas) */
113: u8 type; /* Area type (standard, stub, NSSA), represented
114: by option flags (OPT_E, OPT_N) */
115: u8 summary; /* Import summaries to this stub/NSSA area, valid for ABR */
116: u8 default_nssa; /* Generate default NSSA route for NSSA+summary area */
117: u8 translator; /* Translator role, for NSSA ABR */
118: u32 transint; /* Translator stability interval */
119: list patt_list; /* List of iface configs (struct ospf_iface_patt) */
120: list net_list; /* List of aggregate networks for that area */
121: list enet_list; /* List of aggregate external (NSSA) networks */
122: list stubnet_list; /* List of stub networks added to Router LSA */
123: };
124:
125: struct area_net_config
126: {
127: node n;
128: struct prefix px;
129: u32 tag;
130: u8 hidden;
131: };
132:
133: struct area_net
134: {
135: struct fib_node fn;
136: u32 metric; /* With possible LSA_EXT3_EBIT for NSSA area nets */
137: u32 tag;
138: u8 hidden;
139: u8 active;
140: };
141:
142: struct ospf_stubnet_config
143: {
144: node n;
145: struct prefix px;
146: u32 cost;
147: u8 hidden;
148: u8 summary;
149: };
150:
151: struct nbma_node
152: {
153: node n;
154: ip_addr ip;
155: byte eligible;
156: byte found;
157: };
158:
159: struct ospf_iface_patt
160: {
161: struct iface_patt i;
162: u32 type;
163: u32 stub;
164: u32 cost;
165: u32 helloint;
166: u32 rxmtint;
167: u32 pollint;
168: u32 waitint;
169: u32 deadc;
170: u32 deadint;
171: u32 inftransdelay;
172: list nbma_list;
173: u32 priority;
174: u32 voa;
175: u32 vid;
176: int tx_tos;
177: int tx_priority;
178: u16 tx_length;
179: u16 rx_buffer;
180:
181: #define OSPF_RXBUF_MINSIZE 256 /* Minimal allowed size */
182: u8 instance_id;
183: u8 autype; /* OSPF_AUTH_*, not really used in OSPFv3 */
184: u8 strictnbma;
185: u8 check_link;
186: u8 ecmp_weight;
187: u8 link_lsa_suppression;
188: u8 real_bcast; /* Not really used in OSPFv3 */
189: u8 ptp_netmask; /* bool + 2 for unspecified */
190: u8 ttl_security; /* bool + 2 for TX only */
191: u8 bfd;
192: u8 bsd_secondary;
193: list *passwords;
194: };
195:
196: /* Default values for interface parameters */
197: #define COST_D 10
198: #define RXMTINT_D 5
199: #define INFTRANSDELAY_D 1
200: #define PRIORITY_D 1
201: #define HELLOINT_D 10
202: #define POLLINT_D 20
203: #define DEADC_D 4
204: #define WAIT_DMH 4
205: /* Value of Wait timer - not found it in RFC * - using 4*HELLO */
206:
207:
208:
209: struct ospf_proto
210: {
211: struct proto p;
212: timer *disp_timer; /* OSPF proto dispatcher */
213: uint tick;
214: struct top_graph *gr; /* LSA graph */
215: slist lsal; /* List of all LSA's */
216: int calcrt; /* Routing table calculation scheduled?
217: 0=no, 1=normal, 2=forced reload */
218: list iface_list; /* List of OSPF interfaces (struct ospf_iface) */
219: list area_list; /* List of OSPF areas (struct ospf_area) */
220: int areano; /* Number of area I belong to */
221: int padj; /* Number of neighbors in Exchange or Loading state */
222: struct fib rtf; /* Routing table */
223: byte ospf2; /* OSPF v2 or v3 */
224: byte rfc1583; /* RFC1583 compatibility */
225: byte stub_router; /* Do not forward transit traffic */
226: byte merge_external; /* Should i merge external routes? */
227: byte asbr; /* May i originate any ext/NSSA lsa? */
228: byte ecmp; /* Maximal number of nexthops in ECMP route, or 0 */
229: struct ospf_area *backbone; /* If exists */
230: event *flood_event; /* Event for flooding LS updates */
231: void *lsab; /* LSA buffer used when originating router LSAs */
232: int lsab_size, lsab_used;
233: linpool *nhpool; /* Linpool used for next hops computed in SPF */
234: sock *vlink_sk; /* IP socket used for vlink TX */
235: u32 router_id;
236: u32 last_vlink_id; /* Interface IDs for vlinks (starts at 0x80000000) */
237: struct tbf log_pkt_tbf; /* TBF for packet messages */
238: struct tbf log_lsa_tbf; /* TBF for LSA messages */
239: };
240:
241: struct ospf_area
242: {
243: node n;
244: u32 areaid;
245: struct ospf_area_config *ac; /* Related area config */
246: struct top_hash_entry *rt; /* My own router LSA */
247: struct top_hash_entry *pxr_lsa; /* Originated prefix LSA */
248: list cand; /* List of candidates for RT calc. */
249: struct fib net_fib; /* Networks to advertise or not */
250: struct fib enet_fib; /* External networks for NSSAs */
251: u32 options; /* Optional features */
252: u8 update_rt_lsa; /* Rt lsa origination scheduled? */
253: u8 trcap; /* Transit capability? */
254: u8 marked; /* Used in OSPF reconfigure */
255: u8 translate; /* Translator state (TRANS_*), for NSSA ABR */
256: timer *translator_timer; /* For NSSA translator switch */
257: struct ospf_proto *po;
258: struct fib rtr; /* Routing tables for routers */
259: };
260:
261:
262:
263: struct ospf_iface
264: {
265: node n;
266: struct iface *iface; /* Nest's iface (NULL for vlinks) */
267: struct ifa *addr; /* IP prefix associated with that OSPF iface */
268: struct ospf_area *oa;
269: struct ospf_iface_patt *cf;
270: char *ifname; /* Interface name (iface->name), new one for vlinks */
271:
272: pool *pool;
273: sock *sk; /* IP socket */
274: list neigh_list; /* List of neighbors (struct ospf_neighbor) */
275: u32 cost; /* Cost of iface */
276: u32 waitint; /* number of sec before changing state from wait */
277: u32 rxmtint; /* number of seconds between LSA retransmissions */
278: u32 pollint; /* Poll interval */
279: u32 deadint; /* after "deadint" missing hellos is router dead */
280: u32 iface_id; /* Interface ID (iface->index or new value for vlinks) */
281: u32 vid; /* ID of peer of virtual link */
282: ip_addr vip; /* IP of peer of virtual link */
283: struct ospf_iface *vifa; /* OSPF iface which the vlink goes through */
284: struct ospf_area *voa; /* OSPF area which the vlink goes through */
285: u16 inftransdelay; /* The estimated number of seconds it takes to
286: transmit a Link State Update Packet over this
287: interface. LSAs contained in the update */
288: u16 helloint; /* number of seconds between hello sending */
289: list *passwords;
290: u32 csn; /* Last used crypt seq number */
291: bird_clock_t csn_use; /* Last time when packet with that CSN was sent */
292: ip_addr all_routers; /* Multicast (or broadcast) address for all routers */
293: ip_addr des_routers; /* Multicast (or NULL) address for designated routers */
294: ip_addr drip; /* Designated router IP */
295: ip_addr bdrip; /* Backup DR IP */
296: u32 drid; /* DR Router ID */
297: u32 bdrid; /* BDR Router ID */
298: s16 rt_pos_beg; /* Position of iface in Router-LSA, begin, inclusive */
299: s16 rt_pos_end; /* Position of iface in Router-LSA, end, exclusive */
300: s16 px_pos_beg; /* Position of iface in Rt Prefix-LSA, begin, inclusive */
301: s16 px_pos_end; /* Position of iface in Rt Prefix-LSA, end, exclusive */
302: u32 dr_iface_id; /* if drid is valid, this is iface_id of DR (for connecting network) */
303: u8 instance_id; /* Used to differentiate between more OSPF
304: instances on one interface */
305: u8 autype; /* Authentication type (OSPF_AUTH_*) */
306: u8 type; /* OSPF view of type (OSPF_IT_*) */
307: u8 strictnbma; /* Can I talk with unknown neighbors? */
308: u8 stub; /* Inactive interface */
309: u8 state; /* Interface state machine (OSPF_IS_*) */
310: timer *wait_timer; /* WAIT timer */
311: timer *hello_timer; /* HELLOINT timer */
312: timer *poll_timer; /* Poll Interval - for NBMA */
313:
314: struct top_hash_entry *link_lsa; /* Originated link LSA */
315: struct top_hash_entry *net_lsa; /* Originated network LSA */
316: struct top_hash_entry *pxn_lsa; /* Originated prefix LSA */
317: struct top_hash_entry **flood_queue; /* LSAs queued for LSUPD */
318: u8 update_link_lsa;
319: u8 update_net_lsa;
320: u16 flood_queue_used; /* The current number of LSAs in flood_queue */
321: u16 flood_queue_size; /* The maximum number of LSAs in flood_queue */
322: int fadj; /* Number of fully adjacent neighbors */
323: list nbma_list;
324: u8 priority; /* A router priority for DR election */
325: u8 ioprob;
326: #define OSPF_I_OK 0 /* Everything OK */
327: #define OSPF_I_SK 1 /* Socket open failed */
328: #define OSPF_I_LL 2 /* Missing link-local address (OSPFv3) */
329: u8 sk_dr; /* Socket is a member of designated routers group */
330: u8 marked; /* Used in OSPF reconfigure, 2 for force restart */
331: u16 rxbuf; /* Buffer size */
332: u16 tx_length; /* Soft TX packet length limit, usually MTU */
333: u16 tx_hdrlen; /* Expected packet header length, less than tx_length */
334: u8 check_link; /* Whether iface link change is used */
335: u8 ecmp_weight; /* Weight used for ECMP */
336: u8 link_lsa_suppression; /* Suppression of Link-LSA origination */
337: u8 ptp_netmask; /* Send real netmask for P2P */
338: u8 check_ttl; /* Check incoming packets for TTL 255 */
339: u8 bfd; /* Use BFD on iface */
340: };
341:
342: struct ospf_neighbor
343: {
344: node n;
345: pool *pool;
346: struct ospf_iface *ifa;
347: u8 state;
348: timer *inactim; /* Inactivity timer */
349: u8 imms; /* I, M, Master/slave received */
350: u8 myimms; /* I, M Master/slave */
351: u32 dds; /* DD Sequence number being sent */
352: u32 ddr; /* last Dat Des packet received */
353:
354: u32 rid; /* Router ID */
355: ip_addr ip; /* IP of it's interface */
356: u8 priority; /* Priority */
357: u8 adj; /* built adjacency? */
358: u32 options; /* Options received */
359:
360: /* Entries dr and bdr store IP addresses in OSPFv2 and router IDs in
361: OSPFv3, we use the same type to simplify handling */
362: u32 dr; /* Neighbor's idea of DR */
363: u32 bdr; /* Neighbor's idea of BDR */
364: u32 iface_id; /* ID of Neighbour's iface connected to common network */
365:
366: /* Database summary list iterator, controls initial dbdes exchange.
367: * Advances in the LSA list as dbdes packets are sent.
368: */
369: siterator dbsi; /* iterator of po->lsal */
370:
371: /* Link state request list, controls initial LSA exchange.
372: * Entries added when received in dbdes packets, removed as sent in lsreq packets.
373: */
374: slist lsrql; /* slist of struct top_hash_entry from n->lsrqh */
375: struct top_graph *lsrqh;
376: struct top_hash_entry *lsrqi; /* Pointer to the first unsent node in lsrql */
377:
378: /* Link state retransmission list, controls LSA retransmission during flood.
379: * Entries added as sent in lsupd packets, removed when received in lsack packets.
380: * These entries hold ret_count in appropriate LSA entries.
381: */
382: slist lsrtl; /* slist of struct top_hash_entry from n->lsrth */
383: struct top_graph *lsrth;
384: timer *dbdes_timer; /* DBDES exchange timer */
385: timer *lsrq_timer; /* LSA request timer */
386: timer *lsrt_timer; /* LSA retransmission timer */
387: list ackl[2];
388: #define ACKL_DIRECT 0
389: #define ACKL_DELAY 1
390: timer *ackd_timer; /* Delayed ack timer */
391: struct bfd_request *bfd_req; /* BFD request, if BFD is used */
392: void *ldd_buffer; /* Last database description packet */
393: u32 ldd_bsize; /* Buffer size for ldd_buffer */
394: u32 csn; /* Last received crypt seq number (for MD5) */
395: };
396:
397:
398: /* OSPF interface types */
399: #define OSPF_IT_BCAST 0
400: #define OSPF_IT_NBMA 1
401: #define OSPF_IT_PTP 2
402: #define OSPF_IT_PTMP 3
403: #define OSPF_IT_VLINK 4
404: #define OSPF_IT_UNDEF 5
405:
406: /* OSPF interface states */
407: #define OSPF_IS_DOWN 0 /* Not active */
408: #define OSPF_IS_LOOP 1 /* Iface with no link */
409: #define OSPF_IS_WAITING 2 /* Waiting for Wait timer */
410: #define OSPF_IS_PTP 3 /* PTP operational */
411: #define OSPF_IS_DROTHER 4 /* I'm on BCAST or NBMA and I'm not DR */
412: #define OSPF_IS_BACKUP 5 /* I'm BDR */
413: #define OSPF_IS_DR 6 /* I'm DR */
414:
415: /* Definitions for interface state machine */
416: #define ISM_UP 0 /* Interface Up */
417: #define ISM_WAITF 1 /* Wait timer fired */
418: #define ISM_BACKS 2 /* Backup seen */
419: #define ISM_NEICH 3 /* Neighbor change */
420: #define ISM_LOOP 4 /* Link down */
421: #define ISM_UNLOOP 5 /* Link up */
422: #define ISM_DOWN 6 /* Interface down */
423:
424: /* OSPF authentication types */
425: #define OSPF_AUTH_NONE 0
426: #define OSPF_AUTH_SIMPLE 1
427: #define OSPF_AUTH_CRYPT 2
428:
429:
430: /* OSPF neighbor states */
431: #define NEIGHBOR_DOWN 0
432: #define NEIGHBOR_ATTEMPT 1
433: #define NEIGHBOR_INIT 2
434: #define NEIGHBOR_2WAY 3
435: #define NEIGHBOR_EXSTART 4
436: #define NEIGHBOR_EXCHANGE 5
437: #define NEIGHBOR_LOADING 6
438: #define NEIGHBOR_FULL 7
439:
440: /* Definitions for neighbor state machine */
441: #define INM_HELLOREC 0 /* Hello Received */
442: #define INM_START 1 /* Neighbor start - for NBMA */
443: #define INM_2WAYREC 2 /* 2-Way received */
444: #define INM_NEGDONE 3 /* Negotiation done */
445: #define INM_EXDONE 4 /* Exchange done */
446: #define INM_BADLSREQ 5 /* Bad LS Request */
447: #define INM_LOADDONE 6 /* Load done */
448: #define INM_ADJOK 7 /* AdjOK? */
449: #define INM_SEQMIS 8 /* Sequence number mismatch */
450: #define INM_1WAYREC 9 /* 1-Way */
451: #define INM_KILLNBR 10 /* Kill Neighbor */
452: #define INM_INACTTIM 11 /* Inactivity timer */
453: #define INM_LLDOWN 12 /* Line down */
454:
455: #define TRANS_OFF 0
456: #define TRANS_ON 1
457: #define TRANS_WAIT 2 /* Waiting before the end of translation */
458:
459:
460: /* Generic option flags */
461: #define OPT_V6 0x01 /* OSPFv3, LSA relevant for IPv6 routing calculation */
462: #define OPT_E 0x02 /* Related to AS-external LSAs */
463: #define OPT_MC 0x04 /* Related to MOSPF, not used and obsolete */
464: #define OPT_N 0x08 /* Related to NSSA */
465: #define OPT_P 0x08 /* OSPFv2, flags P and N share position, see NSSA RFC */
466: #define OPT_EA 0x10 /* OSPFv2, external attributes, not used and obsolete */
467: #define OPT_R 0x10 /* OSPFv3, originator is active router */
468: #define OPT_DC 0x20 /* Related to demand circuits, not used */
469:
470: /* Router-LSA VEB flags are are stored together with links (OSPFv2) or options (OSPFv3) */
471: #define OPT_RT_B (0x01 << 24)
472: #define OPT_RT_E (0x02 << 24)
473: #define OPT_RT_V (0x04 << 24)
474: #define OPT_RT_NT (0x10 << 24)
475:
476: /* Prefix flags, specific for OSPFv3 */
477: #define OPT_PX_NU 0x01
478: #define OPT_PX_LA 0x02
479: #define OPT_PX_P 0x08
480: #define OPT_PX_DN 0x10
481:
482:
483: struct ospf_packet
484: {
485: u8 version;
486: u8 type;
487: u16 length;
488: u32 routerid;
489: u32 areaid;
490: u16 checksum;
491: u8 instance_id; /* See RFC 6549 */
492: u8 autype; /* Undefined for OSPFv3 */
493: };
494:
495: struct ospf_auth_crypto
496: {
497: u16 zero;
498: u8 keyid;
499: u8 len;
500: u32 csn;
501: };
502:
503: union ospf_auth
504: {
505: u8 password[8];
506: struct ospf_auth_crypto c32;
507: };
508:
509: /* Packet types */
510: #define HELLO_P 1 /* Hello */
511: #define DBDES_P 2 /* Database description */
512: #define LSREQ_P 3 /* Link state request */
513: #define LSUPD_P 4 /* Link state update */
514: #define LSACK_P 5 /* Link state acknowledgement */
515:
516:
517: #define DBDES_I 4 /* Init bit */
518: #define DBDES_M 2 /* More bit */
519: #define DBDES_MS 1 /* Master/Slave bit */
520: #define DBDES_IMMS (DBDES_I | DBDES_M | DBDES_MS)
521:
522:
523: #define LSA_T_RT 0x2001
524: #define LSA_T_NET 0x2002
525: #define LSA_T_SUM_NET 0x2003
526: #define LSA_T_SUM_RT 0x2004
527: #define LSA_T_EXT 0x4005
528: #define LSA_T_NSSA 0x2007
529: #define LSA_T_LINK 0x0008
530: #define LSA_T_PREFIX 0x2009
531:
532: #define LSA_T_V2_MASK 0x00ff
533:
534: #define LSA_UBIT 0x8000
535:
536: #define LSA_SCOPE_LINK 0x0000
537: #define LSA_SCOPE_AREA 0x2000
538: #define LSA_SCOPE_AS 0x4000
539: #define LSA_SCOPE_RES 0x6000
540: #define LSA_SCOPE_MASK 0x6000
541: #define LSA_SCOPE(type) ((type) & LSA_SCOPE_MASK)
542:
543:
544: #define LSA_MAXAGE 3600 /* 1 hour */
545: #define LSA_CHECKAGE 300 /* 5 minutes */
546: #define LSA_MAXAGEDIFF 900 /* 15 minutes */
547:
548: #define LSA_ZEROSEQNO ((s32) 0x80000000)
549: #define LSA_INITSEQNO ((s32) 0x80000001)
550: #define LSA_MAXSEQNO ((s32) 0x7fffffff)
551:
552: #define LSA_METRIC_MASK 0x00FFFFFF
553: #define LSA_OPTIONS_MASK 0x00FFFFFF
554:
555:
556: #define LSART_PTP 1
557: #define LSART_NET 2
558: #define LSART_STUB 3
559: #define LSART_VLNK 4
560:
561: #define LSA_RT2_LINKS 0x0000FFFF
562:
563: #define LSA_SUM2_TOS 0xFF000000
564:
565: #define LSA_EXT2_TOS 0x7F000000
566: #define LSA_EXT2_EBIT 0x80000000
567:
568: #define LSA_EXT3_EBIT 0x4000000
569: #define LSA_EXT3_FBIT 0x2000000
570: #define LSA_EXT3_TBIT 0x1000000
571:
572:
573: struct ospf_lsa_header
574: {
575: u16 age; /* LS Age */
576: u16 type_raw; /* Type, mixed with options on OSPFv2 */
577:
578: u32 id;
579: u32 rt; /* Advertising router */
580: s32 sn; /* LS Sequence number */
581: u16 checksum;
582: u16 length;
583: };
584:
585:
586: /* In OSPFv2, options are embedded in higher half of type_raw */
587: static inline u8 lsa_get_options(struct ospf_lsa_header *lsa)
588: { return lsa->type_raw >> 8; }
589:
590: static inline void lsa_set_options(struct ospf_lsa_header *lsa, u16 options)
591: { lsa->type_raw = (lsa->type_raw & 0xff) | (options << 8); }
592:
593:
594: struct ospf_lsa_rt
595: {
596: u32 options; /* VEB flags, mixed with link count for OSPFv2 and options for OSPFv3 */
597: };
598:
599: struct ospf_lsa_rt2_link
600: {
601: u32 id;
602: u32 data;
603: #ifdef CPU_BIG_ENDIAN
604: u8 type;
605: u8 no_tos;
606: u16 metric;
607: #else
608: u16 metric;
609: u8 no_tos;
610: u8 type;
611: #endif
612: };
613:
614: struct ospf_lsa_rt2_tos
615: {
616: #ifdef CPU_BIG_ENDIAN
617: u8 tos;
618: u8 padding;
619: u16 metric;
620: #else
621: u16 metric;
622: u8 padding;
623: u8 tos;
624: #endif
625: };
626:
627: struct ospf_lsa_rt3_link
628: {
629: #ifdef CPU_BIG_ENDIAN
630: u8 type;
631: u8 padding;
632: u16 metric;
633: #else
634: u16 metric;
635: u8 padding;
636: u8 type;
637: #endif
638: u32 lif; /* Local interface ID */
639: u32 nif; /* Neighbor interface ID */
640: u32 id; /* Neighbor router ID */
641: };
642:
643:
644: struct ospf_lsa_net
645: {
646: u32 optx; /* Netmask for OSPFv2, options for OSPFv3 */
647: u32 routers[];
648: };
649:
650: struct ospf_lsa_sum2
651: {
652: u32 netmask;
653: u32 metric;
654: };
655:
656: struct ospf_lsa_sum3_net
657: {
658: u32 metric;
659: u32 prefix[];
660: };
661:
662: struct ospf_lsa_sum3_rt
663: {
664: u32 options;
665: u32 metric;
666: u32 drid;
667: };
668:
669: struct ospf_lsa_ext2
670: {
671: u32 netmask;
672: u32 metric;
673: u32 fwaddr;
674: u32 tag;
675: };
676:
677: struct ospf_lsa_ext3
678: {
679: u32 metric;
680: u32 rest[];
681: };
682:
683: struct ospf_lsa_ext_local
684: {
685: ip_addr ip, fwaddr;
686: int pxlen;
687: u32 metric, ebit, fbit, tag, propagate;
688: u8 pxopts;
689: };
690:
691: struct ospf_lsa_link
692: {
693: u32 options;
694: ip6_addr lladdr;
695: u32 pxcount;
696: u32 rest[];
697: };
698:
699: struct ospf_lsa_prefix
700: {
701: #ifdef CPU_BIG_ENDIAN
702: u16 pxcount;
703: u16 ref_type;
704: #else
705: u16 ref_type;
706: u16 pxcount;
707: #endif
708: u32 ref_id;
709: u32 ref_rt;
710: u32 rest[];
711: };
712:
713:
714: static inline uint
715: lsa_net_count(struct ospf_lsa_header *lsa)
716: {
717: return (lsa->length - sizeof(struct ospf_lsa_header) - sizeof(struct ospf_lsa_net))
718: / sizeof(u32);
719: }
720:
721: /* In ospf_area->rtr we store paths to routers, but we use RID (and not IP address)
722: as index, so we need to encapsulate RID to IP address */
723:
724: #define ipa_from_rid(x) ipa_from_u32(x)
725: #define ipa_to_rid(x) ipa_to_u32(x)
726:
727: #define IPV6_PREFIX_SPACE(x) ((((x) + 63) / 32) * 4)
728: #define IPV6_PREFIX_WORDS(x) (((x) + 63) / 32)
729:
730: /* FIXME: these four functions should be significantly redesigned w.r.t. integration,
731: also should be named as ospf3_* instead of *_ipv6_* */
732:
733: static inline u32 *
734: lsa_get_ipv6_prefix(u32 *buf, ip_addr *addr, int *pxlen, u8 *pxopts, u16 *rest)
735: {
736: u8 pxl = (*buf >> 24);
737: *pxopts = (*buf >> 16);
738: *rest = *buf;
739: *pxlen = pxl;
740: buf++;
741:
742: *addr = IPA_NONE;
743:
744: #ifdef IPV6
745: if (pxl > 0)
746: _I0(*addr) = *buf++;
747: if (pxl > 32)
748: _I1(*addr) = *buf++;
749: if (pxl > 64)
750: _I2(*addr) = *buf++;
751: if (pxl > 96)
752: _I3(*addr) = *buf++;
753:
754: /* Clean up remaining bits */
755: if (pxl < 128)
756: addr->addr[pxl / 32] &= u32_mkmask(pxl % 32);
757: #endif
758:
759: return buf;
760: }
761:
762: static inline u32 *
763: lsa_get_ipv6_addr(u32 *buf, ip_addr *addr)
764: {
765: *addr = *(ip_addr *) buf;
766: return buf + 4;
767: }
768:
769: static inline u32 *
770: put_ipv6_prefix(u32 *buf, ip_addr addr UNUSED4, u8 pxlen UNUSED4, u8 pxopts UNUSED4, u16 lh UNUSED4)
771: {
772: #ifdef IPV6
773: *buf++ = ((pxlen << 24) | (pxopts << 16) | lh);
774:
775: if (pxlen > 0)
776: *buf++ = _I0(addr);
777: if (pxlen > 32)
778: *buf++ = _I1(addr);
779: if (pxlen > 64)
780: *buf++ = _I2(addr);
781: if (pxlen > 96)
782: *buf++ = _I3(addr);
783: #endif
784: return buf;
785: }
786:
787: static inline u32 *
788: put_ipv6_addr(u32 *buf, ip_addr addr)
789: {
790: *(ip_addr *) buf = addr;
791: return buf + 4;
792: }
793:
794:
795: struct ospf_lsreq_header
796: {
797: u32 type;
798: u32 id;
799: u32 rt;
800: };
801:
802:
803:
804: #define SH_ROUTER_SELF 0xffffffff
805:
806: struct lsadb_show_data {
807: struct symbol *name; /* Protocol to request data from */
808: u16 type; /* LSA Type, 0 -> all */
809: u16 scope; /* Scope, 0 -> all, hack to handle link scope as 1 */
810: u32 area; /* Specified for area scope */
811: u32 lsid; /* LSA ID, 0 -> all */
812: u32 router; /* Advertising router, 0 -> all */
813: };
814:
815:
816: #define EA_OSPF_METRIC1 EA_CODE(EAP_OSPF, 0)
817: #define EA_OSPF_METRIC2 EA_CODE(EAP_OSPF, 1)
818: #define EA_OSPF_TAG EA_CODE(EAP_OSPF, 2)
819: #define EA_OSPF_ROUTER_ID EA_CODE(EAP_OSPF, 3)
820:
821:
822: /* ospf.c */
823: void ospf_schedule_rtcalc(struct ospf_proto *p);
824:
825: static inline void ospf_notify_rt_lsa(struct ospf_area *oa)
826: { oa->update_rt_lsa = 1; }
827:
828: static inline void ospf_notify_net_lsa(struct ospf_iface *ifa)
829: { ifa->update_net_lsa = 1; }
830:
831: static inline void ospf_notify_link_lsa(struct ospf_iface *ifa)
832: { ifa->update_link_lsa = 1; }
833:
834:
835: #define ospf_is_v2(X) OSPF_IS_V2
836: #define ospf_is_v3(X) (!OSPF_IS_V2)
837: /*
838: static inline int ospf_is_v2(struct ospf_proto *p)
839: { return p->ospf2; }
840:
841: static inline int ospf_is_v3(struct ospf_proto *p)
842: { return ! p->ospf2; }
843: */
844: static inline int ospf_get_version(struct ospf_proto *p UNUSED4 UNUSED6)
845: { return ospf_is_v2(p) ? 2 : 3; }
846:
847: struct ospf_area *ospf_find_area(struct ospf_proto *p, u32 aid);
848:
849: static inline struct ospf_area *ospf_main_area(struct ospf_proto *p)
850: { return (p->areano == 1) ? HEAD(p->area_list) : p->backbone; }
851:
852: static inline int oa_is_stub(struct ospf_area *oa)
853: { return (oa->options & (OPT_E | OPT_N)) == 0; }
854:
855: static inline int oa_is_ext(struct ospf_area *oa)
856: { return oa->options & OPT_E; }
857:
858: static inline int oa_is_nssa(struct ospf_area *oa)
859: { return oa->options & OPT_N; }
860:
861: void ospf_sh_neigh(struct proto *P, char *iff);
862: void ospf_sh(struct proto *P);
863: void ospf_sh_iface(struct proto *P, char *iff);
864: void ospf_sh_state(struct proto *P, int verbose, int reachable);
865:
866: void ospf_sh_lsadb(struct lsadb_show_data *ld);
867:
868: /* iface.c */
869: void ospf_iface_chstate(struct ospf_iface *ifa, u8 state);
870: void ospf_iface_sm(struct ospf_iface *ifa, int event);
871: struct ospf_iface *ospf_iface_find(struct ospf_proto *p, struct iface *what);
872: void ospf_if_notify(struct proto *P, uint flags, struct iface *iface);
873: void ospf_ifa_notify2(struct proto *P, uint flags, struct ifa *a);
874: void ospf_ifa_notify3(struct proto *P, uint flags, struct ifa *a);
875: void ospf_iface_info(struct ospf_iface *ifa);
876: void ospf_iface_new(struct ospf_area *oa, struct ifa *addr, struct ospf_iface_patt *ip);
877: void ospf_iface_new_vlink(struct ospf_proto *p, struct ospf_iface_patt *ip);
878: void ospf_iface_remove(struct ospf_iface *ifa);
879: void ospf_iface_shutdown(struct ospf_iface *ifa);
880: int ospf_iface_assure_bufsize(struct ospf_iface *ifa, uint plen);
881: int ospf_iface_reconfigure(struct ospf_iface *ifa, struct ospf_iface_patt *new);
882: void ospf_reconfigure_ifaces(struct ospf_proto *p);
883: void ospf_open_vlink_sk(struct ospf_proto *p);
884: struct nbma_node *find_nbma_node_(list *nnl, ip_addr ip);
885:
886: static inline struct nbma_node * find_nbma_node(struct ospf_iface *ifa, ip_addr ip)
887: { return find_nbma_node_(&ifa->nbma_list, ip); }
888:
889: /* neighbor.c */
890: struct ospf_neighbor *ospf_neighbor_new(struct ospf_iface *ifa);
891: void ospf_neigh_sm(struct ospf_neighbor *n, int event);
892: void ospf_dr_election(struct ospf_iface *ifa);
893: struct ospf_neighbor *find_neigh(struct ospf_iface *ifa, u32 rid);
894: struct ospf_neighbor *find_neigh_by_ip(struct ospf_iface *ifa, ip_addr ip);
895: void ospf_neigh_update_bfd(struct ospf_neighbor *n, int use_bfd);
896: void ospf_sh_neigh_info(struct ospf_neighbor *n);
897:
898: /* packet.c */
899: void ospf_pkt_fill_hdr(struct ospf_iface *ifa, void *buf, u8 h_type);
900: int ospf_rx_hook(sock * sk, uint size);
901: // void ospf_tx_hook(sock * sk);
902: void ospf_err_hook(sock * sk, int err);
903: void ospf_verr_hook(sock *sk, int err);
904: void ospf_send_to(struct ospf_iface *ifa, ip_addr ip);
905: void ospf_send_to_agt(struct ospf_iface *ifa, u8 state);
906: void ospf_send_to_bdr(struct ospf_iface *ifa);
907:
908: static inline uint ospf_pkt_maxsize(struct ospf_iface *ifa)
909: { return ifa->tx_length - ifa->tx_hdrlen; }
910:
911: static inline void ospf_send_to_all(struct ospf_iface *ifa)
912: { ospf_send_to(ifa, ifa->all_routers); }
913:
914: static inline void ospf_send_to_des(struct ospf_iface *ifa)
915: {
916: if (ipa_nonzero(ifa->des_routers))
917: ospf_send_to(ifa, ifa->des_routers);
918: else
919: ospf_send_to_bdr(ifa);
920: }
921:
922: #ifndef PARSER
923: #define DROP(DSC,VAL) do { err_dsc = DSC; err_val = VAL; goto drop; } while(0)
924: #define DROP1(DSC) do { err_dsc = DSC; goto drop; } while(0)
925: #define SKIP(DSC) do { err_dsc = DSC; goto skip; } while(0)
926: #endif
927:
928: static inline uint ospf_pkt_hdrlen(struct ospf_proto *p UNUSED4 UNUSED6)
929: { return ospf_is_v2(p) ? (sizeof(struct ospf_packet) + sizeof(union ospf_auth)) : sizeof(struct ospf_packet); }
930:
931: static inline void * ospf_tx_buffer(struct ospf_iface *ifa)
932: { return ifa->sk->tbuf; }
933:
934: /* hello.c */
935: #define OHS_HELLO 0
936: #define OHS_POLL 1
937: #define OHS_SHUTDOWN 2
938:
939: void ospf_send_hello(struct ospf_iface *ifa, int kind, struct ospf_neighbor *dirn);
940: void ospf_receive_hello(struct ospf_packet *pkt, struct ospf_iface *ifa, struct ospf_neighbor *n, ip_addr faddr);
941:
942: /* dbdes.c */
943: void ospf_send_dbdes(struct ospf_proto *p, struct ospf_neighbor *n);
944: void ospf_rxmt_dbdes(struct ospf_proto *p, struct ospf_neighbor *n);
945: void ospf_receive_dbdes(struct ospf_packet *pkt, struct ospf_iface *ifa, struct ospf_neighbor *n);
946:
947: /* lsreq.c */
948: void ospf_send_lsreq(struct ospf_proto *p, struct ospf_neighbor *n);
949: void ospf_receive_lsreq(struct ospf_packet *pkt, struct ospf_iface *ifa, struct ospf_neighbor *n);
950:
951: /* lsupd.c */
952: void ospf_dump_lsahdr(struct ospf_proto *p, struct ospf_lsa_header *lsa_n);
953: void ospf_dump_common(struct ospf_proto *p, struct ospf_packet *pkt);
954: void ospf_lsa_lsrt_down_(struct top_hash_entry *en, struct ospf_neighbor *n, struct top_hash_entry *ret);
955: void ospf_add_flushed_to_lsrt(struct ospf_proto *p, struct ospf_neighbor *n);
956: void ospf_flood_event(void *ptr);
957: int ospf_flood_lsa(struct ospf_proto *p, struct top_hash_entry *en, struct ospf_neighbor *from);
958: int ospf_send_lsupd(struct ospf_proto *p, struct top_hash_entry **lsa_list, uint lsa_count, struct ospf_neighbor *n);
959: void ospf_rxmt_lsupd(struct ospf_proto *p, struct ospf_neighbor *n);
960: void ospf_receive_lsupd(struct ospf_packet *pkt, struct ospf_iface *ifa, struct ospf_neighbor *n);
961:
962: /* lsack.c */
963: void ospf_enqueue_lsack(struct ospf_neighbor *n, struct ospf_lsa_header *h_n, int queue);
964: void ospf_reset_lsack_queue(struct ospf_neighbor *n);
965: void ospf_send_lsack(struct ospf_proto *p, struct ospf_neighbor *n, int queue);
966: void ospf_receive_lsack(struct ospf_packet *pkt, struct ospf_iface *ifa, struct ospf_neighbor *n);
967:
968:
969: #include "proto/ospf/rt.h"
970: #include "proto/ospf/topology.h"
971: #include "proto/ospf/lsalib.h"
972:
973: #endif /* _BIRD_OSPF_H_ */
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