summaryrefslogtreecommitdiffstats
path: root/net/batman-adv/types.h
blob: b2c94e1393191e00165e42e117ded3dd2374f70f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
/* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors:
 *
 * Marek Lindner, Simon Wunderlich
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA
 */

#ifndef _NET_BATMAN_ADV_TYPES_H_
#define _NET_BATMAN_ADV_TYPES_H_

#include "packet.h"
#include "bitarray.h"
#include <linux/kernel.h>

/**
 * Maximum overhead for the encapsulation for a payload packet
 */
#define BATADV_HEADER_LEN \
	(ETH_HLEN + max(sizeof(struct batadv_unicast_packet), \
			sizeof(struct batadv_bcast_packet)))

#ifdef CONFIG_BATMAN_ADV_DAT

/* batadv_dat_addr_t is the type used for all DHT addresses. If it is changed,
 * BATADV_DAT_ADDR_MAX is changed as well.
 *
 * *Please be careful: batadv_dat_addr_t must be UNSIGNED*
 */
#define batadv_dat_addr_t uint16_t

#endif /* CONFIG_BATMAN_ADV_DAT */

/**
 * struct batadv_hard_iface_bat_iv - per hard interface B.A.T.M.A.N. IV data
 * @ogm_buff: buffer holding the OGM packet
 * @ogm_buff_len: length of the OGM packet buffer
 * @ogm_seqno: OGM sequence number - used to identify each OGM
 */
struct batadv_hard_iface_bat_iv {
	unsigned char *ogm_buff;
	int ogm_buff_len;
	atomic_t ogm_seqno;
};

/**
 * struct batadv_hard_iface - network device known to batman-adv
 * @list: list node for batadv_hardif_list
 * @if_num: identificator of the interface
 * @if_status: status of the interface for batman-adv
 * @net_dev: pointer to the net_device
 * @frag_seqno: last fragment sequence number sent by this interface
 * @num_bcasts: number of payload re-broadcasts on this interface (ARQ)
 * @hardif_obj: kobject of the per interface sysfs "mesh" directory
 * @refcount: number of contexts the object is used
 * @batman_adv_ptype: packet type describing packets that should be processed by
 *  batman-adv for this interface
 * @soft_iface: the batman-adv interface which uses this network interface
 * @rcu: struct used for freeing in an RCU-safe manner
 * @bat_iv: BATMAN IV specific per hard interface data
 * @cleanup_work: work queue callback item for hard interface deinit
 */
struct batadv_hard_iface {
	struct list_head list;
	int16_t if_num;
	char if_status;
	struct net_device *net_dev;
	atomic_t frag_seqno;
	uint8_t num_bcasts;
	struct kobject *hardif_obj;
	atomic_t refcount;
	struct packet_type batman_adv_ptype;
	struct net_device *soft_iface;
	struct rcu_head rcu;
	struct batadv_hard_iface_bat_iv bat_iv;
	struct work_struct cleanup_work;
};

/**
 * struct batadv_orig_node - structure for orig_list maintaining nodes of mesh
 * @orig: originator ethernet address
 * @primary_addr: hosts primary interface address
 * @router: router that should be used to reach this originator
 * @batadv_dat_addr_t:  address of the orig node in the distributed hash
 * @bcast_own: bitfield containing the number of our OGMs this orig_node
 *  rebroadcasted "back" to us (relative to last_real_seqno)
 * @bcast_own_sum: counted result of bcast_own
 * @last_seen: time when last packet from this node was received
 * @bcast_seqno_reset: time when the broadcast seqno window was reset
 * @batman_seqno_reset: time when the batman seqno window was reset
 * @gw_flags: flags related to gateway class
 * @flags: for now only VIS_SERVER flag
 * @last_ttvn: last seen translation table version number
 * @tt_crc: CRC of the translation table
 * @tt_buff: last tt changeset this node received from the orig node
 * @tt_buff_len: length of the last tt changeset this node received from the
 *  orig node
 * @tt_buff_lock: lock that protects tt_buff and tt_buff_len
 * @tt_size: number of global TT entries announced by the orig node
 * @tt_initialised: bool keeping track of whether or not this node have received
 *  any translation table information from the orig node yet
 * @last_real_seqno: last and best known sequence number
 * @last_ttl: ttl of last received packet
 * @bcast_bits: bitfield containing the info which payload broadcast originated
 *  from this orig node this host already has seen (relative to
 *  last_bcast_seqno)
 * @last_bcast_seqno: last broadcast sequence number received by this host
 * @neigh_list: list of potential next hop neighbor towards this orig node
 * @frag_list: fragmentation buffer list for fragment re-assembly
 * @last_frag_packet: time when last fragmented packet from this node was
 *  received
 * @neigh_list_lock: lock protecting neigh_list, router and bonding_list
 * @hash_entry: hlist node for batadv_priv::orig_hash
 * @bat_priv: pointer to soft_iface this orig node belongs to
 * @ogm_cnt_lock: lock protecting bcast_own, bcast_own_sum,
 *  neigh_node->real_bits & neigh_node->real_packet_count
 * @bcast_seqno_lock: lock protecting bcast_bits & last_bcast_seqno
 * @bond_candidates: how many candidates are available
 * @bond_list: list of bonding candidates
 * @refcount: number of contexts the object is used
 * @rcu: struct used for freeing in an RCU-safe manner
 * @in_coding_list: list of nodes this orig can hear
 * @out_coding_list: list of nodes that can hear this orig
 * @in_coding_list_lock: protects in_coding_list
 * @out_coding_list_lock: protects out_coding_list
 */
struct batadv_orig_node {
	uint8_t orig[ETH_ALEN];
	uint8_t primary_addr[ETH_ALEN];
	struct batadv_neigh_node __rcu *router; /* rcu protected pointer */
#ifdef CONFIG_BATMAN_ADV_DAT
	batadv_dat_addr_t dat_addr;
#endif
	unsigned long *bcast_own;
	uint8_t *bcast_own_sum;
	unsigned long last_seen;
	unsigned long bcast_seqno_reset;
	unsigned long batman_seqno_reset;
	uint8_t gw_flags;
	uint8_t flags;
	atomic_t last_ttvn;
	uint16_t tt_crc;
	unsigned char *tt_buff;
	int16_t tt_buff_len;
	spinlock_t tt_buff_lock; /* protects tt_buff & tt_buff_len */
	atomic_t tt_size;
	bool tt_initialised;
	uint32_t last_real_seqno;
	uint8_t last_ttl;
	DECLARE_BITMAP(bcast_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);
	uint32_t last_bcast_seqno;
	struct hlist_head neigh_list;
	struct list_head frag_list;
	unsigned long last_frag_packet;
	/* neigh_list_lock protects: neigh_list, router & bonding_list */
	spinlock_t neigh_list_lock;
	struct hlist_node hash_entry;
	struct batadv_priv *bat_priv;
	/* ogm_cnt_lock protects: bcast_own, bcast_own_sum,
	 * neigh_node->real_bits & neigh_node->real_packet_count
	 */
	spinlock_t ogm_cnt_lock;
	/* bcast_seqno_lock protects: bcast_bits & last_bcast_seqno */
	spinlock_t bcast_seqno_lock;
	atomic_t bond_candidates;
	struct list_head bond_list;
	atomic_t refcount;
	struct rcu_head rcu;
#ifdef CONFIG_BATMAN_ADV_NC
	struct list_head in_coding_list;
	struct list_head out_coding_list;
	spinlock_t in_coding_list_lock; /* Protects in_coding_list */
	spinlock_t out_coding_list_lock; /* Protects out_coding_list */
#endif
};

/**
 * struct batadv_gw_node - structure for orig nodes announcing gw capabilities
 * @list: list node for batadv_priv_gw::list
 * @orig_node: pointer to corresponding orig node
 * @deleted: this struct is scheduled for deletion
 * @refcount: number of contexts the object is used
 * @rcu: struct used for freeing in an RCU-safe manner
 */
struct batadv_gw_node {
	struct hlist_node list;
	struct batadv_orig_node *orig_node;
	unsigned long deleted;
	atomic_t refcount;
	struct rcu_head rcu;
};

/**
 * struct batadv_neigh_node - structure for single hop neighbors
 * @list: list node for batadv_orig_node::neigh_list
 * @addr: mac address of neigh node
 * @tq_recv: ring buffer of received TQ values from this neigh node
 * @tq_index: ring buffer index
 * @tq_avg: averaged tq of all tq values in the ring buffer (tq_recv)
 * @last_ttl: last received ttl from this neigh node
 * @bonding_list: list node for batadv_orig_node::bond_list
 * @last_seen: when last packet via this neighbor was received
 * @real_bits: bitfield containing the number of OGMs received from this neigh
 *  node (relative to orig_node->last_real_seqno)
 * @real_packet_count: counted result of real_bits
 * @orig_node: pointer to corresponding orig_node
 * @if_incoming: pointer to incoming hard interface
 * @lq_update_lock: lock protecting tq_recv & tq_index
 * @refcount: number of contexts the object is used
 * @rcu: struct used for freeing in an RCU-safe manner
 */
struct batadv_neigh_node {
	struct hlist_node list;
	uint8_t addr[ETH_ALEN];
	uint8_t tq_recv[BATADV_TQ_GLOBAL_WINDOW_SIZE];
	uint8_t tq_index;
	uint8_t tq_avg;
	uint8_t last_ttl;
	struct list_head bonding_list;
	unsigned long last_seen;
	DECLARE_BITMAP(real_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);
	uint8_t real_packet_count;
	struct batadv_orig_node *orig_node;
	struct batadv_hard_iface *if_incoming;
	spinlock_t lq_update_lock; /* protects tq_recv & tq_index */
	atomic_t refcount;
	struct rcu_head rcu;
};

/**
 * struct batadv_bcast_duplist_entry - structure for LAN broadcast suppression
 * @orig[ETH_ALEN]: mac address of orig node orginating the broadcast
 * @crc: crc32 checksum of broadcast payload
 * @entrytime: time when the broadcast packet was received
 */
#ifdef CONFIG_BATMAN_ADV_BLA
struct batadv_bcast_duplist_entry {
	uint8_t orig[ETH_ALEN];
	__be32 crc;
	unsigned long entrytime;
};
#endif

/**
 * enum batadv_counters - indices for traffic counters
 * @BATADV_CNT_TX: transmitted payload traffic packet counter
 * @BATADV_CNT_TX_BYTES: transmitted payload traffic bytes counter
 * @BATADV_CNT_TX_DROPPED: dropped transmission payload traffic packet counter
 * @BATADV_CNT_RX: received payload traffic packet counter
 * @BATADV_CNT_RX_BYTES: received payload traffic bytes counter
 * @BATADV_CNT_FORWARD: forwarded payload traffic packet counter
 * @BATADV_CNT_FORWARD_BYTES: forwarded payload traffic bytes counter
 * @BATADV_CNT_MGMT_TX: transmitted routing protocol traffic packet counter
 * @BATADV_CNT_MGMT_TX_BYTES: transmitted routing protocol traffic bytes counter
 * @BATADV_CNT_MGMT_RX: received routing protocol traffic packet counter
 * @BATADV_CNT_MGMT_RX_BYTES: received routing protocol traffic bytes counter
 * @BATADV_CNT_TT_REQUEST_TX: transmitted tt req traffic packet counter
 * @BATADV_CNT_TT_REQUEST_RX: received tt req traffic packet counter
 * @BATADV_CNT_TT_RESPONSE_TX: transmitted tt resp traffic packet counter
 * @BATADV_CNT_TT_RESPONSE_RX: received tt resp traffic packet counter
 * @BATADV_CNT_TT_ROAM_ADV_TX: transmitted tt roam traffic packet counter
 * @BATADV_CNT_TT_ROAM_ADV_RX: received tt roam traffic packet counter
 * @BATADV_CNT_DAT_GET_TX: transmitted dht GET traffic packet counter
 * @BATADV_CNT_DAT_GET_RX: received dht GET traffic packet counter
 * @BATADV_CNT_DAT_PUT_TX: transmitted dht PUT traffic packet counter
 * @BATADV_CNT_DAT_PUT_RX: received dht PUT traffic packet counter
 * @BATADV_CNT_DAT_CACHED_REPLY_TX: transmitted dat cache reply traffic packet
 *  counter
 * @BATADV_CNT_NC_CODE: transmitted nc-combined traffic packet counter
 * @BATADV_CNT_NC_CODE_BYTES: transmitted nc-combined traffic bytes counter
 * @BATADV_CNT_NC_RECODE: transmitted nc-recombined traffic packet counter
 * @BATADV_CNT_NC_RECODE_BYTES: transmitted nc-recombined traffic bytes counter
 * @BATADV_CNT_NC_BUFFER: counter for packets buffered for later nc decoding
 * @BATADV_CNT_NC_DECODE: received and nc-decoded traffic packet counter
 * @BATADV_CNT_NC_DECODE_BYTES: received and nc-decoded traffic bytes counter
 * @BATADV_CNT_NC_DECODE_FAILED: received and decode-failed traffic packet
 *  counter
 * @BATADV_CNT_NC_SNIFFED: counter for nc-decoded packets received in promisc
 *  mode.
 * @BATADV_CNT_NUM: number of traffic counters
 */
enum batadv_counters {
	BATADV_CNT_TX,
	BATADV_CNT_TX_BYTES,
	BATADV_CNT_TX_DROPPED,
	BATADV_CNT_RX,
	BATADV_CNT_RX_BYTES,
	BATADV_CNT_FORWARD,
	BATADV_CNT_FORWARD_BYTES,
	BATADV_CNT_MGMT_TX,
	BATADV_CNT_MGMT_TX_BYTES,
	BATADV_CNT_MGMT_RX,
	BATADV_CNT_MGMT_RX_BYTES,
	BATADV_CNT_TT_REQUEST_TX,
	BATADV_CNT_TT_REQUEST_RX,
	BATADV_CNT_TT_RESPONSE_TX,
	BATADV_CNT_TT_RESPONSE_RX,
	BATADV_CNT_TT_ROAM_ADV_TX,
	BATADV_CNT_TT_ROAM_ADV_RX,
#ifdef CONFIG_BATMAN_ADV_DAT
	BATADV_CNT_DAT_GET_TX,
	BATADV_CNT_DAT_GET_RX,
	BATADV_CNT_DAT_PUT_TX,
	BATADV_CNT_DAT_PUT_RX,
	BATADV_CNT_DAT_CACHED_REPLY_TX,
#endif
#ifdef CONFIG_BATMAN_ADV_NC
	BATADV_CNT_NC_CODE,
	BATADV_CNT_NC_CODE_BYTES,
	BATADV_CNT_NC_RECODE,
	BATADV_CNT_NC_RECODE_BYTES,
	BATADV_CNT_NC_BUFFER,
	BATADV_CNT_NC_DECODE,
	BATADV_CNT_NC_DECODE_BYTES,
	BATADV_CNT_NC_DECODE_FAILED,
	BATADV_CNT_NC_SNIFFED,
#endif
	BATADV_CNT_NUM,
};

/**
 * struct batadv_priv_tt - per mesh interface translation table data
 * @vn: translation table version number
 * @ogm_append_cnt: counter of number of OGMs containing the local tt diff
 * @local_changes: changes registered in an originator interval
 * @changes_list: tracks tt local changes within an originator interval
 * @local_hash: local translation table hash table
 * @global_hash: global translation table hash table
 * @req_list: list of pending & unanswered tt_requests
 * @roam_list: list of the last roaming events of each client limiting the
 *  number of roaming events to avoid route flapping
 * @changes_list_lock: lock protecting changes_list
 * @req_list_lock: lock protecting req_list
 * @roam_list_lock: lock protecting roam_list
 * @local_entry_num: number of entries in the local hash table
 * @local_crc: Checksum of the local table, recomputed before sending a new OGM
 * @last_changeset: last tt changeset this host has generated
 * @last_changeset_len: length of last tt changeset this host has generated
 * @last_changeset_lock: lock protecting last_changeset & last_changeset_len
 * @work: work queue callback item for translation table purging
 */
struct batadv_priv_tt {
	atomic_t vn;
	atomic_t ogm_append_cnt;
	atomic_t local_changes;
	struct list_head changes_list;
	struct batadv_hashtable *local_hash;
	struct batadv_hashtable *global_hash;
	struct list_head req_list;
	struct list_head roam_list;
	spinlock_t changes_list_lock; /* protects changes */
	spinlock_t req_list_lock; /* protects req_list */
	spinlock_t roam_list_lock; /* protects roam_list */
	atomic_t local_entry_num;
	uint16_t local_crc;
	unsigned char *last_changeset;
	int16_t last_changeset_len;
	/* protects last_changeset & last_changeset_len */
	spinlock_t last_changeset_lock;
	struct delayed_work work;
};

/**
 * struct batadv_priv_bla - per mesh interface bridge loope avoidance data
 * @num_requests; number of bla requests in flight
 * @claim_hash: hash table containing mesh nodes this host has claimed
 * @backbone_hash: hash table containing all detected backbone gateways
 * @bcast_duplist: recently received broadcast packets array (for broadcast
 *  duplicate suppression)
 * @bcast_duplist_curr: index of last broadcast packet added to bcast_duplist
 * @bcast_duplist_lock: lock protecting bcast_duplist & bcast_duplist_curr
 * @claim_dest: local claim data (e.g. claim group)
 * @work: work queue callback item for cleanups & bla announcements
 */
#ifdef CONFIG_BATMAN_ADV_BLA
struct batadv_priv_bla {
	atomic_t num_requests;
	struct batadv_hashtable *claim_hash;
	struct batadv_hashtable *backbone_hash;
	struct batadv_bcast_duplist_entry bcast_duplist[BATADV_DUPLIST_SIZE];
	int bcast_duplist_curr;
	/* protects bcast_duplist & bcast_duplist_curr */
	spinlock_t bcast_duplist_lock;
	struct batadv_bla_claim_dst claim_dest;
	struct delayed_work work;
};
#endif

/**
 * struct batadv_debug_log - debug logging data
 * @log_buff: buffer holding the logs (ring bufer)
 * @log_start: index of next character to read
 * @log_end: index of next character to write
 * @lock: lock protecting log_buff, log_start & log_end
 * @queue_wait: log reader's wait queue
 */
#ifdef CONFIG_BATMAN_ADV_DEBUG
struct batadv_priv_debug_log {
	char log_buff[BATADV_LOG_BUF_LEN];
	unsigned long log_start;
	unsigned long log_end;
	spinlock_t lock; /* protects log_buff, log_start and log_end */
	wait_queue_head_t queue_wait;
};
#endif

/**
 * struct batadv_priv_gw - per mesh interface gateway data
 * @list: list of available gateway nodes
 * @list_lock: lock protecting gw_list & curr_gw
 * @curr_gw: pointer to currently selected gateway node
 * @reselect: bool indicating a gateway re-selection is in progress
 */
struct batadv_priv_gw {
	struct hlist_head list;
	spinlock_t list_lock; /* protects gw_list & curr_gw */
	struct batadv_gw_node __rcu *curr_gw;  /* rcu protected pointer */
	atomic_t reselect;
};

/**
 * struct batadv_priv_vis - per mesh interface vis data
 * @send_list: list of batadv_vis_info packets to sent
 * @hash: hash table containing vis data from other nodes in the network
 * @hash_lock: lock protecting the hash table
 * @list_lock: lock protecting my_info::recv_list
 * @work: work queue callback item for vis packet sending
 * @my_info: holds this node's vis data sent on a regular basis
 */
struct batadv_priv_vis {
	struct list_head send_list;
	struct batadv_hashtable *hash;
	spinlock_t hash_lock; /* protects hash */
	spinlock_t list_lock; /* protects my_info::recv_list */
	struct delayed_work work;
	struct batadv_vis_info *my_info;
};

/**
 * struct batadv_priv_dat - per mesh interface DAT private data
 * @addr: node DAT address
 * @hash: hashtable representing the local ARP cache
 * @work: work queue callback item for cache purging
 */
#ifdef CONFIG_BATMAN_ADV_DAT
struct batadv_priv_dat {
	batadv_dat_addr_t addr;
	struct batadv_hashtable *hash;
	struct delayed_work work;
};
#endif

/**
 * struct batadv_priv_nc - per mesh interface network coding private data
 * @work: work queue callback item for cleanup
 * @debug_dir: dentry for nc subdir in batman-adv directory in debugfs
 * @min_tq: only consider neighbors for encoding if neigh_tq > min_tq
 * @max_fwd_delay: maximum packet forward delay to allow coding of packets
 * @max_buffer_time: buffer time for sniffed packets used to decoding
 * @timestamp_fwd_flush: timestamp of last forward packet queue flush
 * @timestamp_sniffed_purge: timestamp of last sniffed packet queue purge
 * @coding_hash: Hash table used to buffer skbs while waiting for another
 *  incoming skb to code it with. Skbs are added to the buffer just before being
 *  forwarded in routing.c
 * @decoding_hash: Hash table used to buffer skbs that might be needed to decode
 *  a received coded skb. The buffer is used for 1) skbs arriving on the
 *  soft-interface; 2) skbs overheard on the hard-interface; and 3) skbs
 *  forwarded by batman-adv.
 */
struct batadv_priv_nc {
	struct delayed_work work;
	struct dentry *debug_dir;
	u8 min_tq;
	u32 max_fwd_delay;
	u32 max_buffer_time;
	unsigned long timestamp_fwd_flush;
	unsigned long timestamp_sniffed_purge;
	struct batadv_hashtable *coding_hash;
	struct batadv_hashtable *decoding_hash;
};

/**
 * struct batadv_priv - per mesh interface data
 * @mesh_state: current status of the mesh (inactive/active/deactivating)
 * @soft_iface: net device which holds this struct as private data
 * @stats: structure holding the data for the ndo_get_stats() call
 * @bat_counters: mesh internal traffic statistic counters (see batadv_counters)
 * @aggregated_ogms: bool indicating whether OGM aggregation is enabled
 * @bonding: bool indicating whether traffic bonding is enabled
 * @fragmentation: bool indicating whether traffic fragmentation is enabled
 * @ap_isolation: bool indicating whether ap isolation is enabled
 * @bridge_loop_avoidance: bool indicating whether bridge loop avoidance is
 *  enabled
 * @distributed_arp_table: bool indicating whether distributed ARP table is
 *  enabled
 * @vis_mode: vis operation: client or server (see batadv_vis_packettype)
 * @gw_mode: gateway operation: off, client or server (see batadv_gw_modes)
 * @gw_sel_class: gateway selection class (applies if gw_mode client)
 * @gw_bandwidth: gateway announced bandwidth (applies if gw_mode server)
 * @orig_interval: OGM broadcast interval in milliseconds
 * @hop_penalty: penalty which will be applied to an OGM's tq-field on every hop
 * @log_level: configured log level (see batadv_dbg_level)
 * @bcast_seqno: last sent broadcast packet sequence number
 * @bcast_queue_left: number of remaining buffered broadcast packet slots
 * @batman_queue_left: number of remaining OGM packet slots
 * @num_ifaces: number of interfaces assigned to this mesh interface
 * @mesh_obj: kobject for sysfs mesh subdirectory
 * @debug_dir: dentry for debugfs batman-adv subdirectory
 * @forw_bat_list: list of aggregated OGMs that will be forwarded
 * @forw_bcast_list: list of broadcast packets that will be rebroadcasted
 * @orig_hash: hash table containing mesh participants (orig nodes)
 * @forw_bat_list_lock: lock protecting forw_bat_list
 * @forw_bcast_list_lock: lock protecting forw_bcast_list
 * @orig_work: work queue callback item for orig node purging
 * @cleanup_work: work queue callback item for soft interface deinit
 * @primary_if: one of the hard interfaces assigned to this mesh interface
 *  becomes the primary interface
 * @bat_algo_ops: routing algorithm used by this mesh interface
 * @bla: bridge loope avoidance data
 * @debug_log: holding debug logging relevant data
 * @gw: gateway data
 * @tt: translation table data
 * @vis: vis data
 * @dat: distributed arp table data
 * @network_coding: bool indicating whether network coding is enabled
 * @batadv_priv_nc: network coding data
 */
struct batadv_priv {
	atomic_t mesh_state;
	struct net_device *soft_iface;
	struct net_device_stats stats;
	uint64_t __percpu *bat_counters; /* Per cpu counters */
	atomic_t aggregated_ogms;
	atomic_t bonding;
	atomic_t fragmentation;
	atomic_t ap_isolation;
#ifdef CONFIG_BATMAN_ADV_BLA
	atomic_t bridge_loop_avoidance;
#endif
#ifdef CONFIG_BATMAN_ADV_DAT
	atomic_t distributed_arp_table;
#endif
	atomic_t vis_mode;
	atomic_t gw_mode;
	atomic_t gw_sel_class;
	atomic_t gw_bandwidth;
	atomic_t orig_interval;
	atomic_t hop_penalty;
#ifdef CONFIG_BATMAN_ADV_DEBUG
	atomic_t log_level;
#endif
	atomic_t bcast_seqno;
	atomic_t bcast_queue_left;
	atomic_t batman_queue_left;
	char num_ifaces;
	struct kobject *mesh_obj;
	struct dentry *debug_dir;
	struct hlist_head forw_bat_list;
	struct hlist_head forw_bcast_list;
	struct batadv_hashtable *orig_hash;
	spinlock_t forw_bat_list_lock; /* protects forw_bat_list */
	spinlock_t forw_bcast_list_lock; /* protects forw_bcast_list */
	struct delayed_work orig_work;
	struct work_struct cleanup_work;
	struct batadv_hard_iface __rcu *primary_if;  /* rcu protected pointer */
	struct batadv_algo_ops *bat_algo_ops;
#ifdef CONFIG_BATMAN_ADV_BLA
	struct batadv_priv_bla bla;
#endif
#ifdef CONFIG_BATMAN_ADV_DEBUG
	struct batadv_priv_debug_log *debug_log;
#endif
	struct batadv_priv_gw gw;
	struct batadv_priv_tt tt;
	struct batadv_priv_vis vis;
#ifdef CONFIG_BATMAN_ADV_DAT
	struct batadv_priv_dat dat;
#endif
#ifdef CONFIG_BATMAN_ADV_NC
	atomic_t network_coding;
	struct batadv_priv_nc nc;
#endif /* CONFIG_BATMAN_ADV_NC */
};

/**
 * struct batadv_socket_client - layer2 icmp socket client data
 * @queue_list: packet queue for packets destined for this socket client
 * @queue_len: number of packets in the packet queue (queue_list)
 * @index: socket client's index in the batadv_socket_client_hash
 * @lock: lock protecting queue_list, queue_len & index
 * @queue_wait: socket client's wait queue
 * @bat_priv: pointer to soft_iface this client belongs to
 */
struct batadv_socket_client {
	struct list_head queue_list;
	unsigned int queue_len;
	unsigned char index;
	spinlock_t lock; /* protects queue_list, queue_len & index */
	wait_queue_head_t queue_wait;
	struct batadv_priv *bat_priv;
};

/**
 * struct batadv_socket_packet - layer2 icmp packet for socket client
 * @list: list node for batadv_socket_client::queue_list
 * @icmp_len: size of the layer2 icmp packet
 * @icmp_packet: layer2 icmp packet
 */
struct batadv_socket_packet {
	struct list_head list;
	size_t icmp_len;
	struct batadv_icmp_packet_rr icmp_packet;
};

/**
 * struct batadv_bla_backbone_gw - batman-adv gateway bridged into the LAN
 * @orig: originator address of backbone node (mac address of primary iface)
 * @vid: vlan id this gateway was detected on
 * @hash_entry: hlist node for batadv_priv_bla::backbone_hash
 * @bat_priv: pointer to soft_iface this backbone gateway belongs to
 * @lasttime: last time we heard of this backbone gw
 * @wait_periods: grace time for bridge forward delays and bla group forming at
 *  bootup phase - no bcast traffic is formwared until it has elapsed
 * @request_sent: if this bool is set to true we are out of sync with this
 *  backbone gateway - no bcast traffic is formwared until the situation was
 *  resolved
 * @crc: crc16 checksum over all claims
 * @refcount: number of contexts the object is used
 * @rcu: struct used for freeing in an RCU-safe manner
 */
#ifdef CONFIG_BATMAN_ADV_BLA
struct batadv_bla_backbone_gw {
	uint8_t orig[ETH_ALEN];
	unsigned short vid;
	struct hlist_node hash_entry;
	struct batadv_priv *bat_priv;
	unsigned long lasttime;
	atomic_t wait_periods;
	atomic_t request_sent;
	uint16_t crc;
	atomic_t refcount;
	struct rcu_head rcu;
};

/**
 * struct batadv_bla_claim - claimed non-mesh client structure
 * @addr: mac address of claimed non-mesh client
 * @vid: vlan id this client was detected on
 * @batadv_bla_backbone_gw: pointer to backbone gw claiming this client
 * @lasttime: last time we heard of claim (locals only)
 * @hash_entry: hlist node for batadv_priv_bla::claim_hash
 * @refcount: number of contexts the object is used
 * @rcu: struct used for freeing in an RCU-safe manner
 */
struct batadv_bla_claim {
	uint8_t addr[ETH_ALEN];
	unsigned short vid;
	struct batadv_bla_backbone_gw *backbone_gw;
	unsigned long lasttime;
	struct hlist_node hash_entry;
	struct rcu_head rcu;
	atomic_t refcount;
};
#endif

/**
 * struct batadv_tt_common_entry - tt local & tt global common data
 * @addr: mac address of non-mesh client
 * @hash_entry: hlist node for batadv_priv_tt::local_hash or for
 *  batadv_priv_tt::global_hash
 * @flags: various state handling flags (see batadv_tt_client_flags)
 * @added_at: timestamp used for purging stale tt common entries
 * @refcount: number of contexts the object is used
 * @rcu: struct used for freeing in an RCU-safe manner
 */
struct batadv_tt_common_entry {
	uint8_t addr[ETH_ALEN];
	struct hlist_node hash_entry;
	uint16_t flags;
	unsigned long added_at;
	atomic_t refcount;
	struct rcu_head rcu;
};

/**
 * struct batadv_tt_local_entry - translation table local entry data
 * @common: general translation table data
 * @last_seen: timestamp used for purging stale tt local entries
 */
struct batadv_tt_local_entry {
	struct batadv_tt_common_entry common;
	unsigned long last_seen;
};

/**
 * struct batadv_tt_global_entry - translation table global entry data
 * @common: general translation table data
 * @orig_list: list of orig nodes announcing this non-mesh client
 * @list_lock: lock protecting orig_list
 * @roam_at: time at which TT_GLOBAL_ROAM was set
 */
struct batadv_tt_global_entry {
	struct batadv_tt_common_entry common;
	struct hlist_head orig_list;
	spinlock_t list_lock;	/* protects orig_list */
	unsigned long roam_at;
};

/**
 * struct batadv_tt_orig_list_entry - orig node announcing a non-mesh client
 * @orig_node: pointer to orig node announcing this non-mesh client
 * @ttvn: translation table version number which added the non-mesh client
 * @list: list node for batadv_tt_global_entry::orig_list
 * @refcount: number of contexts the object is used
 * @rcu: struct used for freeing in an RCU-safe manner
 */
struct batadv_tt_orig_list_entry {
	struct batadv_orig_node *orig_node;
	uint8_t ttvn;
	struct hlist_node list;
	atomic_t refcount;
	struct rcu_head rcu;
};

/**
 * struct batadv_tt_change_node - structure for tt changes occured
 * @list: list node for batadv_priv_tt::changes_list
 * @change: holds the actual translation table diff data
 */
struct batadv_tt_change_node {
	struct list_head list;
	struct batadv_tt_change change;
};

/**
 * struct batadv_tt_req_node - data to keep track of the tt requests in flight
 * @addr: mac address address of the originator this request was sent to
 * @issued_at: timestamp used for purging stale tt requests
 * @list: list node for batadv_priv_tt::req_list
 */
struct batadv_tt_req_node {
	uint8_t addr[ETH_ALEN];
	unsigned long issued_at;
	struct list_head list;
};

/**
 * struct batadv_tt_roam_node - roaming client data
 * @addr: mac address of the client in the roaming phase
 * @counter: number of allowed roaming events per client within a single
 *  OGM interval (changes are committed with each OGM)
 * @first_time: timestamp used for purging stale roaming node entries
 * @list: list node for batadv_priv_tt::roam_list
 */
struct batadv_tt_roam_node {
	uint8_t addr[ETH_ALEN];
	atomic_t counter;
	unsigned long first_time;
	struct list_head list;
};

/**
 * struct batadv_nc_node - network coding node
 * @list: next and prev pointer for the list handling
 * @addr: the node's mac address
 * @refcount: number of contexts the object is used by
 * @rcu: struct used for freeing in an RCU-safe manner
 * @orig_node: pointer to corresponding orig node struct
 * @last_seen: timestamp of last ogm received from this node
 */
struct batadv_nc_node {
	struct list_head list;
	uint8_t addr[ETH_ALEN];
	atomic_t refcount;
	struct rcu_head rcu;
	struct batadv_orig_node *orig_node;
	unsigned long last_seen;
};

/**
 * struct batadv_nc_path - network coding path
 * @hash_entry: next and prev pointer for the list handling
 * @rcu: struct used for freeing in an RCU-safe manner
 * @refcount: number of contexts the object is used by
 * @packet_list: list of buffered packets for this path
 * @packet_list_lock: access lock for packet list
 * @next_hop: next hop (destination) of path
 * @prev_hop: previous hop (source) of path
 * @last_valid: timestamp for last validation of path
 */
struct batadv_nc_path {
	struct hlist_node hash_entry;
	struct rcu_head rcu;
	atomic_t refcount;
	struct list_head packet_list;
	spinlock_t packet_list_lock; /* Protects packet_list */
	uint8_t next_hop[ETH_ALEN];
	uint8_t prev_hop[ETH_ALEN];
	unsigned long last_valid;
};

/**
 * struct batadv_nc_packet - network coding packet used when coding and
 *  decoding packets
 * @list: next and prev pointer for the list handling
 * @packet_id: crc32 checksum of skb data
 * @timestamp: field containing the info when the packet was added to path
 * @neigh_node: pointer to original next hop neighbor of skb
 * @skb: skb which can be encoded or used for decoding
 * @nc_path: pointer to path this nc packet is attached to
 */
struct batadv_nc_packet {
	struct list_head list;
	__be32 packet_id;
	unsigned long timestamp;
	struct batadv_neigh_node *neigh_node;
	struct sk_buff *skb;
	struct batadv_nc_path *nc_path;
};

/**
 * batadv_skb_cb - control buffer structure used to store private data relevant
 *  to batman-adv in the skb->cb buffer in skbs.
 * @decoded: Marks a skb as decoded, which is checked when searching for coding
 *  opportunities in network-coding.c
 */
struct batadv_skb_cb {
	bool decoded;
};

/**
 * struct batadv_forw_packet - structure for bcast packets to be sent/forwarded
 * @list: list node for batadv_socket_client::queue_list
 * @send_time: execution time for delayed_work (packet sending)
 * @own: bool for locally generated packets (local OGMs are re-scheduled after
 *  sending)
 * @skb: bcast packet's skb buffer
 * @packet_len: size of aggregated OGM packet inside the skb buffer
 * @direct_link_flags: direct link flags for aggregated OGM packets
 * @num_packets: counter for bcast packet retransmission
 * @delayed_work: work queue callback item for packet sending
 * @if_incoming: pointer incoming hard-iface or primary iface if locally
 *  generated packet
 */
struct batadv_forw_packet {
	struct hlist_node list;
	unsigned long send_time;
	uint8_t own;
	struct sk_buff *skb;
	uint16_t packet_len;
	uint32_t direct_link_flags;
	uint8_t num_packets;
	struct delayed_work delayed_work;
	struct batadv_hard_iface *if_incoming;
};

/**
 * struct batadv_frag_packet_list_entry - storage for fragment packet
 * @list: list node for orig_node::frag_list
 * @seqno: sequence number of the fragment
 * @skb: fragment's skb buffer
 */
struct batadv_frag_packet_list_entry {
	struct list_head list;
	uint16_t seqno;
	struct sk_buff *skb;
};

/**
 * struct batadv_vis_info - local data for vis information
 * @first_seen: timestamp used for purging stale vis info entries
 * @recv_list: List of server-neighbors we have received this packet from. This
 *  packet should not be re-forward to them again. List elements are struct
 *  batadv_vis_recvlist_node
 * @send_list: list of packets to be forwarded
 * @refcount: number of contexts the object is used
 * @hash_entry: hlist node for batadv_priv_vis::hash
 * @bat_priv: pointer to soft_iface this orig node belongs to
 * @skb_packet: contains the vis packet
 */
struct batadv_vis_info {
	unsigned long first_seen;
	struct list_head recv_list;
	struct list_head send_list;
	struct kref refcount;
	struct hlist_node hash_entry;
	struct batadv_priv *bat_priv;
	struct sk_buff *skb_packet;
} __packed;

/**
 * struct batadv_vis_info_entry - contains link information for vis
 * @src: source MAC of the link, all zero for local TT entry
 * @dst: destination MAC of the link, client mac address for local TT entry
 * @quality: transmission quality of the link, or 0 for local TT entry
 */
struct batadv_vis_info_entry {
	uint8_t  src[ETH_ALEN];
	uint8_t  dest[ETH_ALEN];
	uint8_t  quality;
} __packed;

/**
 * struct batadv_vis_recvlist_node - list entry for batadv_vis_info::recv_list
 * @list: list node for batadv_vis_info::recv_list
 * @mac: MAC address of the originator from where the vis_info was received
 */
struct batadv_vis_recvlist_node {
	struct list_head list;
	uint8_t mac[ETH_ALEN];
};

/**
 * struct batadv_vis_if_list_entry - auxiliary data for vis data generation
 * @addr: MAC address of the interface
 * @primary: true if this interface is the primary interface
 * @list: list node the interface list
 *
 * While scanning for vis-entries of a particular vis-originator
 * this list collects its interfaces to create a subgraph/cluster
 * out of them later
 */
struct batadv_vis_if_list_entry {
	uint8_t addr[ETH_ALEN];
	bool primary;
	struct hlist_node list;
};

/**
 * struct batadv_algo_ops - mesh algorithm callbacks
 * @list: list node for the batadv_algo_list
 * @name: name of the algorithm
 * @bat_iface_enable: init routing info when hard-interface is enabled
 * @bat_iface_disable: de-init routing info when hard-interface is disabled
 * @bat_iface_update_mac: (re-)init mac addresses of the protocol information
 *  belonging to this hard-interface
 * @bat_primary_iface_set: called when primary interface is selected / changed
 * @bat_ogm_schedule: prepare a new outgoing OGM for the send queue
 * @bat_ogm_emit: send scheduled OGM
 */
struct batadv_algo_ops {
	struct hlist_node list;
	char *name;
	int (*bat_iface_enable)(struct batadv_hard_iface *hard_iface);
	void (*bat_iface_disable)(struct batadv_hard_iface *hard_iface);
	void (*bat_iface_update_mac)(struct batadv_hard_iface *hard_iface);
	void (*bat_primary_iface_set)(struct batadv_hard_iface *hard_iface);
	void (*bat_ogm_schedule)(struct batadv_hard_iface *hard_iface);
	void (*bat_ogm_emit)(struct batadv_forw_packet *forw_packet);
};

/**
 * struct batadv_dat_entry - it is a single entry of batman-adv ARP backend. It
 * is used to stored ARP entries needed for the global DAT cache
 * @ip: the IPv4 corresponding to this DAT/ARP entry
 * @mac_addr: the MAC address associated to the stored IPv4
 * @last_update: time in jiffies when this entry was refreshed last time
 * @hash_entry: hlist node for batadv_priv_dat::hash
 * @refcount: number of contexts the object is used
 * @rcu: struct used for freeing in an RCU-safe manner
 */
struct batadv_dat_entry {
	__be32 ip;
	uint8_t mac_addr[ETH_ALEN];
	unsigned long last_update;
	struct hlist_node hash_entry;
	atomic_t refcount;
	struct rcu_head rcu;
};

/**
 * struct batadv_dat_candidate - candidate destination for DAT operations
 * @type: the type of the selected candidate. It can one of the following:
 *	  - BATADV_DAT_CANDIDATE_NOT_FOUND
 *	  - BATADV_DAT_CANDIDATE_ORIG
 * @orig_node: if type is BATADV_DAT_CANDIDATE_ORIG this field points to the
 *	       corresponding originator node structure
 */
struct batadv_dat_candidate {
	int type;
	struct batadv_orig_node *orig_node;
};

#endif /* _NET_BATMAN_ADV_TYPES_H_ */