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7f57883e DS |
1 | /* |
2 | * EIGRP Definition of Data Structures. | |
3 | * Copyright (C) 2013-2016 | |
4 | * Authors: | |
5 | * Donnie Savage | |
6 | * Jan Janovic | |
7 | * Matej Perina | |
8 | * Peter Orsag | |
9 | * Peter Paluch | |
10 | * Frantisek Gazo | |
11 | * Tomas Hvorkovy | |
12 | * Martin Kontsek | |
13 | * Lukas Koribsky | |
14 | * | |
15 | * This file is part of GNU Zebra. | |
16 | * | |
17 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
18 | * under the terms of the GNU General Public License as published by the | |
19 | * Free Software Foundation; either version 2, or (at your option) any | |
20 | * later version. | |
21 | * | |
22 | * GNU Zebra is distributed in the hope that it will be useful, but | |
23 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
25 | * General Public License for more details. | |
26 | * | |
896014f4 DL |
27 | * You should have received a copy of the GNU General Public License along |
28 | * with this program; see the file COPYING; if not, write to the Free Software | |
29 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
7f57883e DS |
30 | */ |
31 | ||
32 | #ifndef _ZEBRA_EIGRP_STRUCTS_H_ | |
33 | #define _ZEBRA_EIGRP_STRUCTS_H_ | |
34 | ||
35 | #include "filter.h" | |
36 | ||
37 | #include "eigrpd/eigrp_const.h" | |
38 | #include "eigrpd/eigrp_macros.h" | |
39 | ||
40 | /* EIGRP master for system wide configuration and variables. */ | |
d62a17ae | 41 | struct eigrp_master { |
42 | /* EIGRP instance. */ | |
43 | struct list *eigrp; | |
7f57883e | 44 | |
d62a17ae | 45 | /* EIGRP thread master. */ |
46 | struct thread_master *master; | |
7f57883e | 47 | |
d62a17ae | 48 | /* Zebra interface list. */ |
49 | struct list *iflist; | |
7f57883e | 50 | |
d62a17ae | 51 | /* EIGRP start time. */ |
52 | time_t start_time; | |
7f57883e | 53 | |
d62a17ae | 54 | /* Various EIGRP global configuration. */ |
d7c0a89a | 55 | uint8_t options; |
7f57883e DS |
56 | |
57 | #define EIGRP_MASTER_SHUTDOWN (1 << 0) /* deferred-shutdown */ | |
58 | }; | |
59 | ||
d62a17ae | 60 | struct eigrp_metrics { |
d7c0a89a QY |
61 | uint32_t delay; |
62 | uint32_t bandwidth; | |
d62a17ae | 63 | unsigned char mtu[3]; |
d7c0a89a QY |
64 | uint8_t hop_count; |
65 | uint8_t reliability; | |
66 | uint8_t load; | |
67 | uint8_t tag; | |
68 | uint8_t flags; | |
7f57883e DS |
69 | }; |
70 | ||
d62a17ae | 71 | struct eigrp { |
d7c0a89a QY |
72 | uint16_t AS; /* Autonomous system number */ |
73 | uint16_t vrid; /* Virtual Router ID */ | |
74 | uint8_t k_values[6]; /*Array for K values configuration*/ | |
75 | uint8_t variance; /*Metric variance multiplier*/ | |
76 | uint8_t max_paths; /*Maximum allowed paths for 1 prefix*/ | |
7f57883e | 77 | |
d62a17ae | 78 | /*Name of this EIGRP instance*/ |
79 | char *name; | |
7f57883e | 80 | |
d62a17ae | 81 | /* EIGRP Router ID. */ |
900e2d42 DS |
82 | struct in_addr router_id; /* Configured automatically. */ |
83 | struct in_addr router_id_static; /* Configured manually. */ | |
7f57883e | 84 | |
d62a17ae | 85 | struct list *eiflist; /* eigrp interfaces */ |
d7c0a89a | 86 | uint8_t passive_interface_default; /* passive-interface default */ |
7f57883e | 87 | |
d62a17ae | 88 | unsigned int fd; |
89 | unsigned int maxsndbuflen; | |
7f57883e | 90 | |
d7c0a89a | 91 | uint32_t sequence_number; /*Global EIGRP sequence number*/ |
7f57883e | 92 | |
d62a17ae | 93 | struct stream *ibuf; |
94 | struct list *oi_write_q; | |
7f57883e | 95 | |
d62a17ae | 96 | /*Threads*/ |
97 | struct thread *t_write; | |
98 | struct thread *t_read; | |
99 | struct thread *t_distribute; /* timer for distribute list */ | |
7f57883e | 100 | |
d62a17ae | 101 | struct route_table *networks; /* EIGRP config networks. */ |
7f57883e | 102 | |
9ca66cc7 | 103 | struct route_table *topology_table; |
7f57883e | 104 | |
d62a17ae | 105 | uint64_t serno; /* Global serial number counter for topology entry |
106 | changes*/ | |
996c9314 LB |
107 | uint64_t serno_last_update; /* Highest serial number of information send |
108 | by last update*/ | |
d62a17ae | 109 | struct list *topology_changes_internalIPV4; |
110 | struct list *topology_changes_externalIPV4; | |
7f57883e | 111 | |
d62a17ae | 112 | /*Neighbor self*/ |
113 | struct eigrp_neighbor *neighbor_self; | |
7f57883e | 114 | |
d62a17ae | 115 | /*Configured metric for redistributed routes*/ |
116 | struct eigrp_metrics dmetric[ZEBRA_ROUTE_MAX + 1]; | |
117 | int redistribute; /* Num of redistributed protocols. */ | |
7f57883e | 118 | |
d62a17ae | 119 | /* Access-list. */ |
120 | struct access_list *list[EIGRP_FILTER_MAX]; | |
121 | /* Prefix-list. */ | |
122 | struct prefix_list *prefix[EIGRP_FILTER_MAX]; | |
123 | /* Route-map. */ | |
124 | struct route_map *routemap[EIGRP_FILTER_MAX]; | |
7f57883e | 125 | |
d62a17ae | 126 | /* For redistribute route map. */ |
127 | struct { | |
128 | char *name; | |
129 | struct route_map *map; | |
130 | int metric_config; | |
d7c0a89a | 131 | uint32_t metric; |
d62a17ae | 132 | } route_map[ZEBRA_ROUTE_MAX]; |
7f57883e | 133 | |
03a38493 PG |
134 | /* distribute_ctx */ |
135 | struct distribute_ctx *distribute_ctx; | |
136 | ||
d62a17ae | 137 | QOBJ_FIELDS |
7f57883e DS |
138 | }; |
139 | DECLARE_QOBJ_TYPE(eigrp) | |
79b30876 DS |
140 | |
141 | struct eigrp_if_params { | |
d7c0a89a QY |
142 | uint8_t passive_interface; |
143 | uint32_t v_hello; | |
144 | uint16_t v_wait; | |
145 | uint8_t type; /* type of interface */ | |
146 | uint32_t bandwidth; | |
147 | uint32_t delay; | |
148 | uint8_t reliability; | |
149 | uint8_t load; | |
b748db67 DS |
150 | |
151 | char *auth_keychain; /* Associated keychain with interface*/ | |
996c9314 | 152 | int auth_type; /* EIGRP authentication type */ |
79b30876 DS |
153 | }; |
154 | ||
155 | enum { MEMBER_ALLROUTERS = 0, | |
156 | MEMBER_MAX, | |
157 | }; | |
7f57883e DS |
158 | |
159 | /*EIGRP interface structure*/ | |
d62a17ae | 160 | struct eigrp_interface { |
b748db67 | 161 | struct eigrp_if_params params; |
79b30876 DS |
162 | |
163 | /*multicast group refcnts */ | |
b748db67 | 164 | bool member_allrouters; |
996c9314 | 165 | |
d62a17ae | 166 | /* This interface's parent eigrp instance. */ |
167 | struct eigrp *eigrp; | |
168 | ||
169 | /* Interface data from zebra. */ | |
170 | struct interface *ifp; | |
171 | ||
172 | /* Packet send buffer. */ | |
173 | struct eigrp_fifo *obuf; /* Output queue */ | |
174 | ||
175 | /* To which multicast groups do we currently belong? */ | |
176 | ||
d62a17ae | 177 | |
d7c0a89a | 178 | uint8_t multicast_memberships; |
d62a17ae | 179 | |
180 | /* EIGRP Network Type. */ | |
d7c0a89a | 181 | uint8_t type; |
d62a17ae | 182 | |
b245781a | 183 | struct prefix address; /* Interface prefix */ |
d62a17ae | 184 | |
185 | /* Neighbor information. */ | |
186 | struct list *nbrs; /* EIGRP Neighbor List */ | |
187 | ||
188 | /* Threads. */ | |
189 | struct thread *t_hello; /* timer */ | |
190 | struct thread *t_distribute; /* timer for distribute list */ | |
191 | ||
192 | int on_write_q; | |
193 | ||
194 | /* Statistics fields. */ | |
d7c0a89a QY |
195 | uint32_t hello_in; /* Hello message input count. */ |
196 | uint32_t update_in; /* Update message input count. */ | |
197 | uint32_t query_in; /* Querry message input count. */ | |
198 | uint32_t reply_in; /* Reply message input count. */ | |
199 | uint32_t hello_out; /* Hello message output count. */ | |
200 | uint32_t update_out; /* Update message output count. */ | |
201 | uint32_t query_out; /* Query message output count. */ | |
202 | uint32_t reply_out; /* Reply message output count. */ | |
203 | uint32_t siaQuery_in; | |
204 | uint32_t siaQuery_out; | |
205 | uint32_t siaReply_in; | |
206 | uint32_t siaReply_out; | |
207 | uint32_t ack_out; | |
208 | uint32_t ack_in; | |
209 | ||
210 | uint32_t crypt_seqnum; /* Cryptographic Sequence Number */ | |
d62a17ae | 211 | |
212 | /* Access-list. */ | |
213 | struct access_list *list[EIGRP_FILTER_MAX]; | |
214 | /* Prefix-list. */ | |
215 | struct prefix_list *prefix[EIGRP_FILTER_MAX]; | |
216 | /* Route-map. */ | |
217 | struct route_map *routemap[EIGRP_FILTER_MAX]; | |
7f57883e DS |
218 | }; |
219 | ||
7f57883e DS |
220 | /* Determines if it is first or last packet |
221 | * when packet consists of multiple packet | |
222 | * chunks because of many route TLV | |
223 | * (all won't fit into one packet) */ | |
d62a17ae | 224 | enum Packet_part_type { |
7f57883e DS |
225 | EIGRP_PACKET_PART_NA, |
226 | EIGRP_PACKET_PART_FIRST, | |
227 | EIGRP_PACKET_PART_LAST | |
228 | }; | |
229 | ||
230 | /* Neighbor Data Structure */ | |
d62a17ae | 231 | struct eigrp_neighbor { |
232 | /* This neighbor's parent eigrp interface. */ | |
233 | struct eigrp_interface *ei; | |
7f57883e | 234 | |
d62a17ae | 235 | /* EIGRP neighbor Information */ |
d7c0a89a | 236 | uint8_t state; /* neigbor status. */ |
7f57883e | 237 | |
d7c0a89a QY |
238 | uint32_t recv_sequence_number; /* Last received sequence Number. */ |
239 | uint32_t init_sequence_number; | |
7f57883e | 240 | |
d62a17ae | 241 | /*If packet is unacknowledged, we try to send it again 16 times*/ |
d7c0a89a | 242 | uint8_t retrans_counter; |
7f57883e | 243 | |
d62a17ae | 244 | struct in_addr src; /* Neighbor Src address. */ |
7f57883e | 245 | |
d7c0a89a QY |
246 | uint8_t os_rel_major; // system version - just for show |
247 | uint8_t os_rel_minor; // system version - just for show | |
248 | uint8_t tlv_rel_major; // eigrp version - tells us what TLV format to | |
249 | // use | |
250 | uint8_t tlv_rel_minor; // eigrp version - tells us what TLV format to | |
251 | // use | |
7f57883e | 252 | |
d7c0a89a QY |
253 | uint8_t K1; |
254 | uint8_t K2; | |
255 | uint8_t K3; | |
256 | uint8_t K4; | |
257 | uint8_t K5; | |
258 | uint8_t K6; | |
7f57883e | 259 | |
d62a17ae | 260 | /* Timer values. */ |
d7c0a89a | 261 | uint16_t v_holddown; |
7f57883e | 262 | |
d62a17ae | 263 | /* Threads. */ |
264 | struct thread *t_holddown; | |
265 | struct thread *t_nbr_send_gr; /* thread for sending multiple GR packet | |
266 | chunks */ | |
7f57883e | 267 | |
d62a17ae | 268 | struct eigrp_fifo *retrans_queue; |
269 | struct eigrp_fifo *multicast_queue; | |
7f57883e | 270 | |
d7c0a89a | 271 | uint32_t crypt_seqnum; /* Cryptographic Sequence Number. */ |
7f57883e | 272 | |
d62a17ae | 273 | /* prefixes not received from neighbor during Graceful restart */ |
274 | struct list *nbr_gr_prefixes; | |
275 | /* prefixes not yet send to neighbor during Graceful restart */ | |
276 | struct list *nbr_gr_prefixes_send; | |
277 | /* if packet is first or last during Graceful restart */ | |
278 | enum Packet_part_type nbr_gr_packet_type; | |
7f57883e DS |
279 | }; |
280 | ||
281 | //--------------------------------------------------------------------------------------------------------------------------------------------- | |
282 | ||
283 | ||
d62a17ae | 284 | struct eigrp_packet { |
285 | struct eigrp_packet *next; | |
286 | struct eigrp_packet *previous; | |
7f57883e | 287 | |
d62a17ae | 288 | /* Pointer to data stream. */ |
289 | struct stream *s; | |
7f57883e | 290 | |
d62a17ae | 291 | /* IP destination address. */ |
292 | struct in_addr dst; | |
7f57883e | 293 | |
d62a17ae | 294 | /*Packet retransmission thread*/ |
295 | struct thread *t_retrans_timer; | |
7f57883e | 296 | |
d62a17ae | 297 | /*Packet retransmission counter*/ |
d7c0a89a | 298 | uint8_t retrans_counter; |
7f57883e | 299 | |
d7c0a89a | 300 | uint32_t sequence_number; |
7f57883e | 301 | |
d62a17ae | 302 | /* EIGRP packet length. */ |
d7c0a89a | 303 | uint16_t length; |
907b4303 DS |
304 | |
305 | struct eigrp_neighbor *nbr; | |
7f57883e DS |
306 | }; |
307 | ||
d62a17ae | 308 | struct eigrp_fifo { |
309 | struct eigrp_packet *head; | |
310 | struct eigrp_packet *tail; | |
7f57883e | 311 | |
d62a17ae | 312 | unsigned long count; |
7f57883e DS |
313 | }; |
314 | ||
d62a17ae | 315 | struct eigrp_header { |
d7c0a89a QY |
316 | uint8_t version; |
317 | uint8_t opcode; | |
318 | uint16_t checksum; | |
319 | uint32_t flags; | |
320 | uint32_t sequence; | |
321 | uint32_t ack; | |
322 | uint16_t vrid; | |
323 | uint16_t ASNumber; | |
d62a17ae | 324 | char *tlv[0]; |
7f57883e | 325 | |
d62a17ae | 326 | } __attribute__((packed)); |
7f57883e DS |
327 | |
328 | ||
329 | /** | |
330 | * Generic TLV type used for packet decoding. | |
331 | * | |
332 | * +-----+------------------+ | |
333 | * | | | | | |
334 | * | Type| Len | Vector | | |
335 | * | | | | | |
336 | * +-----+------------------+ | |
337 | */ | |
d62a17ae | 338 | struct eigrp_tlv_hdr_type { |
d7c0a89a QY |
339 | uint16_t type; |
340 | uint16_t length; | |
d62a17ae | 341 | uint8_t value[0]; |
342 | } __attribute__((packed)); | |
343 | ||
344 | struct TLV_Parameter_Type { | |
d7c0a89a QY |
345 | uint16_t type; |
346 | uint16_t length; | |
347 | uint8_t K1; | |
348 | uint8_t K2; | |
349 | uint8_t K3; | |
350 | uint8_t K4; | |
351 | uint8_t K5; | |
352 | uint8_t K6; | |
353 | uint16_t hold_time; | |
d62a17ae | 354 | } __attribute__((packed)); |
355 | ||
356 | struct TLV_MD5_Authentication_Type { | |
d7c0a89a QY |
357 | uint16_t type; |
358 | uint16_t length; | |
359 | uint16_t auth_type; | |
360 | uint16_t auth_length; | |
361 | uint32_t key_id; | |
362 | uint32_t key_sequence; | |
363 | uint8_t Nullpad[8]; | |
364 | uint8_t digest[EIGRP_AUTH_TYPE_MD5_LEN]; | |
d62a17ae | 365 | |
366 | } __attribute__((packed)); | |
367 | ||
368 | struct TLV_SHA256_Authentication_Type { | |
d7c0a89a QY |
369 | uint16_t type; |
370 | uint16_t length; | |
371 | uint16_t auth_type; | |
372 | uint16_t auth_length; | |
373 | uint32_t key_id; | |
374 | uint32_t key_sequence; | |
375 | uint8_t Nullpad[8]; | |
376 | uint8_t digest[EIGRP_AUTH_TYPE_SHA256_LEN]; | |
d62a17ae | 377 | |
378 | } __attribute__((packed)); | |
379 | ||
380 | struct TLV_Sequence_Type { | |
d7c0a89a QY |
381 | uint16_t type; |
382 | uint16_t length; | |
383 | uint8_t addr_length; | |
d62a17ae | 384 | struct in_addr *addresses; |
385 | } __attribute__((packed)); | |
386 | ||
387 | struct TLV_Next_Multicast_Sequence { | |
d7c0a89a QY |
388 | uint16_t type; |
389 | uint16_t length; | |
390 | uint32_t multicast_sequence; | |
d62a17ae | 391 | } __attribute__((packed)); |
392 | ||
393 | struct TLV_Software_Type { | |
d7c0a89a QY |
394 | uint16_t type; |
395 | uint16_t length; | |
396 | uint8_t vender_major; | |
397 | uint8_t vender_minor; | |
398 | uint8_t eigrp_major; | |
399 | uint8_t eigrp_minor; | |
d62a17ae | 400 | } __attribute__((packed)); |
401 | ||
402 | struct TLV_IPv4_Internal_type { | |
d7c0a89a QY |
403 | uint16_t type; |
404 | uint16_t length; | |
d62a17ae | 405 | struct in_addr forward; |
406 | ||
407 | /*Metrics*/ | |
408 | struct eigrp_metrics metric; | |
409 | ||
d7c0a89a | 410 | uint8_t prefix_length; |
d62a17ae | 411 | |
412 | unsigned char destination_part[4]; | |
413 | struct in_addr destination; | |
414 | } __attribute__((packed)); | |
415 | ||
416 | struct TLV_IPv4_External_type { | |
d7c0a89a QY |
417 | uint16_t type; |
418 | uint16_t length; | |
d62a17ae | 419 | struct in_addr next_hop; |
420 | struct in_addr originating_router; | |
d7c0a89a QY |
421 | uint32_t originating_as; |
422 | uint32_t administrative_tag; | |
423 | uint32_t external_metric; | |
424 | uint16_t reserved; | |
425 | uint8_t external_protocol; | |
426 | uint8_t external_flags; | |
d62a17ae | 427 | |
428 | /*Metrics*/ | |
429 | struct eigrp_metrics metric; | |
430 | ||
d7c0a89a | 431 | uint8_t prefix_length; |
d62a17ae | 432 | unsigned char destination_part[4]; |
433 | struct in_addr destination; | |
434 | } __attribute__((packed)); | |
7f57883e DS |
435 | |
436 | /* EIGRP Peer Termination TLV - used for hard restart */ | |
d62a17ae | 437 | struct TLV_Peer_Termination_type { |
d7c0a89a QY |
438 | uint16_t type; |
439 | uint16_t length; | |
440 | uint8_t unknown; | |
441 | uint32_t neighbor_ip; | |
7f57883e DS |
442 | } __attribute__((packed)); |
443 | ||
444 | /* Who executed Graceful restart */ | |
d62a17ae | 445 | enum GR_type { EIGRP_GR_MANUAL, EIGRP_GR_FILTER }; |
7f57883e DS |
446 | |
447 | //--------------------------------------------------------------------------------------------------------------------------------------------- | |
448 | ||
449 | /* EIGRP Topology table node structure */ | |
d62a17ae | 450 | struct eigrp_prefix_entry { |
451 | struct list *entries, *rij; | |
d7c0a89a QY |
452 | uint32_t fdistance; // FD |
453 | uint32_t rdistance; // RD | |
454 | uint32_t distance; // D | |
d62a17ae | 455 | struct eigrp_metrics reported_metric; // RD for sending |
456 | ||
d7c0a89a QY |
457 | uint8_t nt; // network type |
458 | uint8_t state; // route fsm state | |
459 | uint8_t af; // address family | |
460 | uint8_t req_action; // required action | |
d62a17ae | 461 | |
02b45998 | 462 | struct prefix *destination; |
d62a17ae | 463 | |
464 | // If network type is REMOTE_EXTERNAL, pointer will have reference to | |
465 | // its external TLV | |
466 | struct TLV_IPv4_External_type *extTLV; | |
467 | ||
468 | uint64_t serno; /*Serial number for this entry. Increased with each | |
469 | change of entry*/ | |
7f57883e DS |
470 | }; |
471 | ||
472 | /* EIGRP Topology table record structure */ | |
255ab940 | 473 | struct eigrp_nexthop_entry { |
d62a17ae | 474 | struct eigrp_prefix_entry *prefix; |
d7c0a89a QY |
475 | uint32_t reported_distance; // distance reported by neighbor |
476 | uint32_t distance; // sum of reported distance and link cost to | |
477 | // advertised neighbor | |
7f57883e | 478 | |
d62a17ae | 479 | struct eigrp_metrics reported_metric; |
480 | struct eigrp_metrics total_metric; | |
7f57883e | 481 | |
d62a17ae | 482 | struct eigrp_neighbor *adv_router; // ip address of advertising neighbor |
d7c0a89a | 483 | uint8_t flags; // used for marking successor and FS |
7f57883e | 484 | |
d62a17ae | 485 | struct eigrp_interface *ei; // pointer for case of connected entry |
7f57883e DS |
486 | }; |
487 | ||
488 | //--------------------------------------------------------------------------------------------------------------------------------------------- | |
7cfa4322 DS |
489 | typedef enum { |
490 | EIGRP_CONNECTED, | |
491 | EIGRP_INT, | |
492 | EIGRP_EXT, | |
493 | } msg_data_t; | |
7f57883e DS |
494 | |
495 | /* EIGRP Finite State Machine */ | |
496 | ||
d62a17ae | 497 | struct eigrp_fsm_action_message { |
d7c0a89a | 498 | uint8_t packet_type; // UPDATE, QUERY, SIAQUERY, SIAREPLY |
d62a17ae | 499 | struct eigrp *eigrp; // which thread sent mesg |
500 | struct eigrp_neighbor *adv_router; // advertising neighbor | |
255ab940 | 501 | struct eigrp_nexthop_entry *entry; |
d62a17ae | 502 | struct eigrp_prefix_entry *prefix; |
7cfa4322 | 503 | msg_data_t data_type; // internal or external tlv type |
db6ec9ff | 504 | struct eigrp_metrics metrics; |
377f30c3 | 505 | enum metric_change change; |
7f57883e DS |
506 | }; |
507 | ||
508 | #endif /* _ZEBRA_EIGRP_STRUCTURES_H_ */ |