summaryrefslogtreecommitdiff
path: root/net/batman-adv/types.h
blob: ca9449ec9836a17bad1455221af0016091e87bde (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
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (C) B.A.T.M.A.N. contributors:
 *
 * Marek Lindner, Simon Wunderlich
 */

#ifndef _NET_BATMAN_ADV_TYPES_H_
#define _NET_BATMAN_ADV_TYPES_H_

#ifndef _NET_BATMAN_ADV_MAIN_H_
#error only "main.h" can be included directly
#endif

#include <linux/average.h>
#include <linux/bitops.h>
#include <linux/compiler.h>
#include <linux/if.h>
#include <linux/if_ether.h>
#include <linux/kref.h>
#include <linux/mutex.h>
#include <linux/netdevice.h>
#include <linux/netlink.h>
#include <linux/sched.h> /* for linux/wait.h */
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/timer.h>
#include <linux/types.h>
#include <linux/wait.h>
#include <linux/workqueue.h>
#include <uapi/linux/batadv_packet.h>
#include <uapi/linux/batman_adv.h>

#ifdef CONFIG_BATMAN_ADV_DAT

/**
 * typedef batadv_dat_addr_t - 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*
 */
typedef u16 batadv_dat_addr_t;

#endif /* CONFIG_BATMAN_ADV_DAT */

/**
 * enum batadv_dhcp_recipient - dhcp destination
 */
enum batadv_dhcp_recipient {
	/** @BATADV_DHCP_NO: packet is not a dhcp message */
	BATADV_DHCP_NO = 0,

	/** @BATADV_DHCP_TO_SERVER: dhcp message is directed to a server */
	BATADV_DHCP_TO_SERVER,

	/** @BATADV_DHCP_TO_CLIENT: dhcp message is directed to a client */
	BATADV_DHCP_TO_CLIENT,
};

/**
 * BATADV_TT_REMOTE_MASK - bitmask selecting the flags that are sent over the
 *  wire only
 */
#define BATADV_TT_REMOTE_MASK	0x00FF

/**
 * BATADV_TT_SYNC_MASK - bitmask of the flags that need to be kept in sync
 *  among the nodes. These flags are used to compute the global/local CRC
 */
#define BATADV_TT_SYNC_MASK	0x00F0

/**
 * struct batadv_hard_iface_bat_iv - per hard-interface B.A.T.M.A.N. IV data
 */
struct batadv_hard_iface_bat_iv {
	/** @ogm_buff: buffer holding the OGM packet */
	unsigned char *ogm_buff;

	/** @ogm_buff_len: length of the OGM packet buffer */
	int ogm_buff_len;

	/** @ogm_seqno: OGM sequence number - used to identify each OGM */
	atomic_t ogm_seqno;

	/** @ogm_buff_mutex: lock protecting ogm_buff and ogm_buff_len */
	struct mutex ogm_buff_mutex;
};

/**
 * enum batadv_v_hard_iface_flags - interface flags useful to B.A.T.M.A.N. V
 */
enum batadv_v_hard_iface_flags {
	/**
	 * @BATADV_FULL_DUPLEX: tells if the connection over this link is
	 *  full-duplex
	 */
	BATADV_FULL_DUPLEX	= BIT(0),

	/**
	 * @BATADV_WARNING_DEFAULT: tells whether we have warned the user that
	 *  no throughput data is available for this interface and that default
	 *  values are assumed.
	 */
	BATADV_WARNING_DEFAULT	= BIT(1),
};

/**
 * struct batadv_hard_iface_bat_v - per hard-interface B.A.T.M.A.N. V data
 */
struct batadv_hard_iface_bat_v {
	/** @elp_interval: time interval between two ELP transmissions */
	atomic_t elp_interval;

	/** @elp_seqno: current ELP sequence number */
	atomic_t elp_seqno;

	/** @elp_skb: base skb containing the ELP message to send */
	struct sk_buff *elp_skb;

	/** @elp_wq: workqueue used to schedule ELP transmissions */
	struct delayed_work elp_wq;

	/** @aggr_wq: workqueue used to transmit queued OGM packets */
	struct delayed_work aggr_wq;

	/** @aggr_list: queue for to be aggregated OGM packets */
	struct sk_buff_head aggr_list;

	/** @aggr_len: size of the OGM aggregate (excluding ethernet header) */
	unsigned int aggr_len;

	/**
	 * @throughput_override: throughput override to disable link
	 *  auto-detection
	 */
	atomic_t throughput_override;

	/** @flags: interface specific flags */
	u8 flags;
};

/**
 * enum batadv_hard_iface_wifi_flags - Flags describing the wifi configuration
 *  of a batadv_hard_iface
 */
enum batadv_hard_iface_wifi_flags {
	/** @BATADV_HARDIF_WIFI_WEXT_DIRECT: it is a wext wifi device */
	BATADV_HARDIF_WIFI_WEXT_DIRECT = BIT(0),

	/** @BATADV_HARDIF_WIFI_CFG80211_DIRECT: it is a cfg80211 wifi device */
	BATADV_HARDIF_WIFI_CFG80211_DIRECT = BIT(1),

	/**
	 * @BATADV_HARDIF_WIFI_WEXT_INDIRECT: link device is a wext wifi device
	 */
	BATADV_HARDIF_WIFI_WEXT_INDIRECT = BIT(2),

	/**
	 * @BATADV_HARDIF_WIFI_CFG80211_INDIRECT: link device is a cfg80211 wifi
	 * device
	 */
	BATADV_HARDIF_WIFI_CFG80211_INDIRECT = BIT(3),
};

/**
 * struct batadv_hard_iface - network device known to batman-adv
 */
struct batadv_hard_iface {
	/** @list: list node for batadv_hardif_list */
	struct list_head list;

	/** @if_status: status of the interface for batman-adv */
	char if_status;

	/**
	 * @num_bcasts: number of payload re-broadcasts on this interface (ARQ)
	 */
	u8 num_bcasts;

	/**
	 * @wifi_flags: flags whether this is (directly or indirectly) a wifi
	 *  interface
	 */
	u32 wifi_flags;

	/** @net_dev: pointer to the net_device */
	struct net_device *net_dev;

	/** @refcount: number of contexts the object is used */
	struct kref refcount;

	/**
	 * @batman_adv_ptype: packet type describing packets that should be
	 * processed by batman-adv for this interface
	 */
	struct packet_type batman_adv_ptype;

	/**
	 * @soft_iface: the batman-adv interface which uses this network
	 *  interface
	 */
	struct net_device *soft_iface;

	/** @rcu: struct used for freeing in an RCU-safe manner */
	struct rcu_head rcu;

	/**
	 * @hop_penalty: penalty which will be applied to the tq-field
	 * of an OGM received via this interface
	 */
	atomic_t hop_penalty;

	/** @bat_iv: per hard-interface B.A.T.M.A.N. IV data */
	struct batadv_hard_iface_bat_iv bat_iv;

#ifdef CONFIG_BATMAN_ADV_BATMAN_V
	/** @bat_v: per hard-interface B.A.T.M.A.N. V data */
	struct batadv_hard_iface_bat_v bat_v;
#endif

	/**
	 * @neigh_list: list of unique single hop neighbors via this interface
	 */
	struct hlist_head neigh_list;

	/** @neigh_list_lock: lock protecting neigh_list */
	spinlock_t neigh_list_lock;
};

/**
 * struct batadv_orig_ifinfo_bat_iv - B.A.T.M.A.N. IV private orig_ifinfo
 *  members
 */
struct batadv_orig_ifinfo_bat_iv {
	/**
	 * @bcast_own: bitfield which counts the number of our OGMs this
	 * orig_node rebroadcasted "back" to us  (relative to last_real_seqno)
	 */
	DECLARE_BITMAP(bcast_own, BATADV_TQ_LOCAL_WINDOW_SIZE);

	/** @bcast_own_sum: sum of bcast_own */
	u8 bcast_own_sum;
};

/**
 * struct batadv_orig_ifinfo - originator info per outgoing interface
 */
struct batadv_orig_ifinfo {
	/** @list: list node for &batadv_orig_node.ifinfo_list */
	struct hlist_node list;

	/** @if_outgoing: pointer to outgoing hard-interface */
	struct batadv_hard_iface *if_outgoing;

	/** @router: router that should be used to reach this originator */
	struct batadv_neigh_node __rcu *router;

	/** @last_real_seqno: last and best known sequence number */
	u32 last_real_seqno;

	/** @last_ttl: ttl of last received packet */
	u8 last_ttl;

	/** @last_seqno_forwarded: seqno of the OGM which was forwarded last */
	u32 last_seqno_forwarded;

	/** @batman_seqno_reset: time when the batman seqno window was reset */
	unsigned long batman_seqno_reset;

	/** @bat_iv: B.A.T.M.A.N. IV private structure */
	struct batadv_orig_ifinfo_bat_iv bat_iv;

	/** @refcount: number of contexts the object is used */
	struct kref refcount;

	/** @rcu: struct used for freeing in an RCU-safe manner */
	struct rcu_head rcu;
};

/**
 * struct batadv_frag_table_entry - head in the fragment buffer table
 */
struct batadv_frag_table_entry {
	/** @fragment_list: head of list with fragments */
	struct hlist_head fragment_list;

	/** @lock: lock to protect the list of fragments */
	spinlock_t lock;

	/** @timestamp: time (jiffie) of last received fragment */
	unsigned long timestamp;

	/** @seqno: sequence number of the fragments in the list */
	u16 seqno;

	/** @size: accumulated size of packets in list */
	u16 size;

	/** @total_size: expected size of the assembled packet */
	u16 total_size;
};

/**
 * struct batadv_frag_list_entry - entry in a list of fragments
 */
struct batadv_frag_list_entry {
	/** @list: list node information */
	struct hlist_node list;

	/** @skb: fragment */
	struct sk_buff *skb;

	/** @no: fragment number in the set */
	u8 no;
};

/**
 * struct batadv_vlan_tt - VLAN specific TT attributes
 */
struct batadv_vlan_tt {
	/** @crc: CRC32 checksum of the entries belonging to this vlan */
	u32 crc;

	/** @num_entries: number of TT entries for this VLAN */
	atomic_t num_entries;
};

/**
 * struct batadv_orig_node_vlan - VLAN specific data per orig_node
 */
struct batadv_orig_node_vlan {
	/** @vid: the VLAN identifier */
	unsigned short vid;

	/** @tt: VLAN specific TT attributes */
	struct batadv_vlan_tt tt;

	/** @list: list node for &batadv_orig_node.vlan_list */
	struct hlist_node list;

	/**
	 * @refcount: number of context where this object is currently in use
	 */
	struct kref refcount;

	/** @rcu: struct used for freeing in a RCU-safe manner */
	struct rcu_head rcu;
};

/**
 * struct batadv_orig_bat_iv - B.A.T.M.A.N. IV private orig_node members
 */
struct batadv_orig_bat_iv {
	/**
	 * @ogm_cnt_lock: lock protecting &batadv_orig_ifinfo_bat_iv.bcast_own,
	 * &batadv_orig_ifinfo_bat_iv.bcast_own_sum,
	 * &batadv_neigh_ifinfo_bat_iv.bat_iv.real_bits and
	 * &batadv_neigh_ifinfo_bat_iv.real_packet_count
	 */
	spinlock_t ogm_cnt_lock;
};

/**
 * struct batadv_orig_node - structure for orig_list maintaining nodes of mesh
 */
struct batadv_orig_node {
	/** @orig: originator ethernet address */
	u8 orig[ETH_ALEN];

	/** @ifinfo_list: list for routers per outgoing interface */
	struct hlist_head ifinfo_list;

	/**
	 * @last_bonding_candidate: pointer to last ifinfo of last used router
	 */
	struct batadv_orig_ifinfo *last_bonding_candidate;

#ifdef CONFIG_BATMAN_ADV_DAT
	/** @dat_addr: address of the orig node in the distributed hash */
	batadv_dat_addr_t dat_addr;
#endif

	/** @last_seen: time when last packet from this node was received */
	unsigned long last_seen;

	/**
	 * @bcast_seqno_reset: time when the broadcast seqno window was reset
	 */
	unsigned long bcast_seqno_reset;

#ifdef CONFIG_BATMAN_ADV_MCAST
	/**
	 * @mcast_handler_lock: synchronizes mcast-capability and -flag changes
	 */
	spinlock_t mcast_handler_lock;

	/** @mcast_flags: multicast flags announced by the orig node */
	u8 mcast_flags;

	/**
	 * @mcast_want_all_unsnoopables_node: a list node for the
	 *  mcast.want_all_unsnoopables list
	 */
	struct hlist_node mcast_want_all_unsnoopables_node;

	/**
	 * @mcast_want_all_ipv4_node: a list node for the mcast.want_all_ipv4
	 *  list
	 */
	struct hlist_node mcast_want_all_ipv4_node;
	/**
	 * @mcast_want_all_ipv6_node: a list node for the mcast.want_all_ipv6
	 *  list
	 */
	struct hlist_node mcast_want_all_ipv6_node;

	/**
	 * @mcast_want_all_rtr4_node: a list node for the mcast.want_all_rtr4
	 *  list
	 */
	struct hlist_node mcast_want_all_rtr4_node;
	/**
	 * @mcast_want_all_rtr6_node: a list node for the mcast.want_all_rtr6
	 *  list
	 */
	struct hlist_node mcast_want_all_rtr6_node;
#endif

	/** @capabilities: announced capabilities of this originator */
	unsigned long capabilities;

	/**
	 * @capa_initialized: bitfield to remember whether a capability was
	 *  initialized
	 */
	unsigned long capa_initialized;

	/** @last_ttvn: last seen translation table version number */
	atomic_t last_ttvn;

	/** @tt_buff: last tt changeset this node received from the orig node */
	unsigned char *tt_buff;

	/**
	 * @tt_buff_len: length of the last tt changeset this node received
	 *  from the orig node
	 */
	s16 tt_buff_len;

	/** @tt_buff_lock: lock that protects tt_buff and tt_buff_len */
	spinlock_t tt_buff_lock;

	/**
	 * @tt_lock: avoids concurrent read from and write to the table. Table
	 *  update is made up of two operations (data structure update and
	 *  metadata -CRC/TTVN-recalculation) and they have to be executed
	 *  atomically in order to avoid another thread to read the
	 *  table/metadata between those.
	 */
	spinlock_t tt_lock;

	/**
	 * @bcast_bits: bitfield containing the info which payload broadcast
	 *  originated from this orig node this host already has seen (relative
	 *  to last_bcast_seqno)
	 */
	DECLARE_BITMAP(bcast_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);

	/**
	 * @last_bcast_seqno: last broadcast sequence number received by this
	 *  host
	 */
	u32 last_bcast_seqno;

	/**
	 * @neigh_list: list of potential next hop neighbor towards this orig
	 *  node
	 */
	struct hlist_head neigh_list;

	/**
	 * @neigh_list_lock: lock protecting neigh_list, ifinfo_list,
	 *  last_bonding_candidate and router
	 */
	spinlock_t neigh_list_lock;

	/** @hash_entry: hlist node for &batadv_priv.orig_hash */
	struct hlist_node hash_entry;

	/** @bat_priv: pointer to soft_iface this orig node belongs to */
	struct batadv_priv *bat_priv;

	/** @bcast_seqno_lock: lock protecting bcast_bits & last_bcast_seqno */
	spinlock_t bcast_seqno_lock;

	/** @refcount: number of contexts the object is used */
	struct kref refcount;

	/** @rcu: struct used for freeing in an RCU-safe manner */
	struct rcu_head rcu;

#ifdef CONFIG_BATMAN_ADV_NC
	/** @in_coding_list: list of nodes this orig can hear */
	struct list_head in_coding_list;

	/** @out_coding_list: list of nodes that can hear this orig */
	struct list_head out_coding_list;

	/** @in_coding_list_lock: protects in_coding_list */
	spinlock_t in_coding_list_lock;

	/** @out_coding_list_lock: protects out_coding_list */
	spinlock_t out_coding_list_lock;
#endif

	/** @fragments: array with heads for fragment chains */
	struct batadv_frag_table_entry fragments[BATADV_FRAG_BUFFER_COUNT];

	/**
	 * @vlan_list: a list of orig_node_vlan structs, one per VLAN served by
	 *  the originator represented by this object
	 */
	struct hlist_head vlan_list;

	/** @vlan_list_lock: lock protecting vlan_list */
	spinlock_t vlan_list_lock;

	/** @bat_iv: B.A.T.M.A.N. IV private structure */
	struct batadv_orig_bat_iv bat_iv;
};

/**
 * enum batadv_orig_capabilities - orig node capabilities
 */
enum batadv_orig_capabilities {
	/**
	 * @BATADV_ORIG_CAPA_HAS_DAT: orig node has distributed arp table
	 *  enabled
	 */
	BATADV_ORIG_CAPA_HAS_DAT,

	/** @BATADV_ORIG_CAPA_HAS_NC: orig node has network coding enabled */
	BATADV_ORIG_CAPA_HAS_NC,

	/** @BATADV_ORIG_CAPA_HAS_TT: orig node has tt capability */
	BATADV_ORIG_CAPA_HAS_TT,

	/**
	 * @BATADV_ORIG_CAPA_HAS_MCAST: orig node has some multicast capability
	 *  (= orig node announces a tvlv of type BATADV_TVLV_MCAST)
	 */
	BATADV_ORIG_CAPA_HAS_MCAST,
};

/**
 * struct batadv_gw_node - structure for orig nodes announcing gw capabilities
 */
struct batadv_gw_node {
	/** @list: list node for &batadv_priv_gw.list */
	struct hlist_node list;

	/** @orig_node: pointer to corresponding orig node */
	struct batadv_orig_node *orig_node;

	/** @bandwidth_down: advertised uplink download bandwidth */
	u32 bandwidth_down;

	/** @bandwidth_up: advertised uplink upload bandwidth */
	u32 bandwidth_up;

	/** @refcount: number of contexts the object is used */
	struct kref refcount;

	/** @rcu: struct used for freeing in an RCU-safe manner */
	struct rcu_head rcu;
};

DECLARE_EWMA(throughput, 10, 8)

/**
 * struct batadv_hardif_neigh_node_bat_v - B.A.T.M.A.N. V private neighbor
 *  information
 */
struct batadv_hardif_neigh_node_bat_v {
	/** @throughput: ewma link throughput towards this neighbor */
	struct ewma_throughput throughput;

	/** @elp_interval: time interval between two ELP transmissions */
	u32 elp_interval;

	/** @elp_latest_seqno: latest and best known ELP sequence number */
	u32 elp_latest_seqno;

	/**
	 * @last_unicast_tx: when the last unicast packet has been sent to this
	 *  neighbor
	 */
	unsigned long last_unicast_tx;

	/** @metric_work: work queue callback item for metric update */
	struct work_struct metric_work;
};

/**
 * struct batadv_hardif_neigh_node - unique neighbor per hard-interface
 */
struct batadv_hardif_neigh_node {
	/** @list: list node for &batadv_hard_iface.neigh_list */
	struct hlist_node list;

	/** @addr: the MAC address of the neighboring interface */
	u8 addr[ETH_ALEN];

	/**
	 * @orig: the address of the originator this neighbor node belongs to
	 */
	u8 orig[ETH_ALEN];

	/** @if_incoming: pointer to incoming hard-interface */
	struct batadv_hard_iface *if_incoming;

	/** @last_seen: when last packet via this neighbor was received */
	unsigned long last_seen;

#ifdef CONFIG_BATMAN_ADV_BATMAN_V
	/** @bat_v: B.A.T.M.A.N. V private data */
	struct batadv_hardif_neigh_node_bat_v bat_v;
#endif

	/** @refcount: number of contexts the object is used */
	struct kref refcount;

	/** @rcu: struct used for freeing in a RCU-safe manner */
	struct rcu_head rcu;
};

/**
 * struct batadv_neigh_node - structure for single hops neighbors
 */
struct batadv_neigh_node {
	/** @list: list node for &batadv_orig_node.neigh_list */
	struct hlist_node list;

	/** @orig_node: pointer to corresponding orig_node */
	struct batadv_orig_node *orig_node;

	/** @addr: the MAC address of the neighboring interface */
	u8 addr[ETH_ALEN];

	/** @ifinfo_list: list for routing metrics per outgoing interface */
	struct hlist_head ifinfo_list;

	/** @ifinfo_lock: lock protecting ifinfo_list and its members */
	spinlock_t ifinfo_lock;

	/** @if_incoming: pointer to incoming hard-interface */
	struct batadv_hard_iface *if_incoming;

	/** @last_seen: when last packet via this neighbor was received */
	unsigned long last_seen;

	/** @hardif_neigh: hardif_neigh of this neighbor */
	struct batadv_hardif_neigh_node *hardif_neigh;

	/** @refcount: number of contexts the object is used */
	struct kref refcount;

	/** @rcu: struct used for freeing in an RCU-safe manner */
	struct rcu_head rcu;
};

/**
 * struct batadv_neigh_ifinfo_bat_iv - neighbor information per outgoing
 *  interface for B.A.T.M.A.N. IV
 */
struct batadv_neigh_ifinfo_bat_iv {
	/** @tq_recv: ring buffer of received TQ values from this neigh node */
	u8 tq_recv[BATADV_TQ_GLOBAL_WINDOW_SIZE];

	/** @tq_index: ring buffer index */
	u8 tq_index;

	/**
	 * @tq_avg: averaged tq of all tq values in the ring buffer (tq_recv)
	 */
	u8 tq_avg;

	/**
	 * @real_bits: bitfield containing the number of OGMs received from this
	 *  neigh node (relative to orig_node->last_real_seqno)
	 */
	DECLARE_BITMAP(real_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);

	/** @real_packet_count: counted result of real_bits */
	u8 real_packet_count;
};

/**
 * struct batadv_neigh_ifinfo_bat_v - neighbor information per outgoing
 *  interface for B.A.T.M.A.N. V
 */
struct batadv_neigh_ifinfo_bat_v {
	/**
	 * @throughput: last throughput metric received from originator via this
	 *  neigh
	 */
	u32 throughput;

	/** @last_seqno: last sequence number known for this neighbor */
	u32 last_seqno;
};

/**
 * struct batadv_neigh_ifinfo - neighbor information per outgoing interface
 */
struct batadv_neigh_ifinfo {
	/** @list: list node for &batadv_neigh_node.ifinfo_list */
	struct hlist_node list;

	/** @if_outgoing: pointer to outgoing hard-interface */
	struct batadv_hard_iface *if_outgoing;

	/** @bat_iv: B.A.T.M.A.N. IV private structure */
	struct batadv_neigh_ifinfo_bat_iv bat_iv;

#ifdef CONFIG_BATMAN_ADV_BATMAN_V
	/** @bat_v: B.A.T.M.A.N. V private data */
	struct batadv_neigh_ifinfo_bat_v bat_v;
#endif

	/** @last_ttl: last received ttl from this neigh node */
	u8 last_ttl;

	/** @refcount: number of contexts the object is used */
	struct kref refcount;

	/** @rcu: struct used for freeing in a RCU-safe manner */
	struct rcu_head rcu;
};

#ifdef CONFIG_BATMAN_ADV_BLA

/**
 * struct batadv_bcast_duplist_entry - structure for LAN broadcast suppression
 */
struct batadv_bcast_duplist_entry {
	/** @orig: mac address of orig node originating the broadcast */
	u8 orig[ETH_ALEN];

	/** @crc: crc32 checksum of broadcast payload */
	__be32 crc;

	/** @entrytime: time when the broadcast packet was received */
	unsigned long entrytime;
};
#endif

/**
 * enum batadv_counters - indices for traffic counters
 */
enum batadv_counters {
	/** @BATADV_CNT_TX: transmitted payload traffic packet counter */
	BATADV_CNT_TX,

	/** @BATADV_CNT_TX_BYTES: transmitted payload traffic bytes counter */
	BATADV_CNT_TX_BYTES,

	/**
	 * @BATADV_CNT_TX_DROPPED: dropped transmission payload traffic packet
	 *  counter
	 */
	BATADV_CNT_TX_DROPPED,

	/** @BATADV_CNT_RX: received payload traffic packet counter */
	BATADV_CNT_RX,

	/** @BATADV_CNT_RX_BYTES: received payload traffic bytes counter */
	BATADV_CNT_RX_BYTES,

	/** @BATADV_CNT_FORWARD: forwarded payload traffic packet counter */
	BATADV_CNT_FORWARD,

	/**
	 * @BATADV_CNT_FORWARD_BYTES: forwarded payload traffic bytes counter
	 */
	BATADV_CNT_FORWARD_BYTES,

	/**
	 * @BATADV_CNT_MGMT_TX: transmitted routing protocol traffic packet
	 *  counter
	 */
	BATADV_CNT_MGMT_TX,

	/**
	 * @BATADV_CNT_MGMT_TX_BYTES: transmitted routing protocol traffic bytes
	 *  counter
	 */
	BATADV_CNT_MGMT_TX_BYTES,

	/**
	 * @BATADV_CNT_MGMT_RX: received routing protocol traffic packet counter
	 */
	BATADV_CNT_MGMT_RX,

	/**
	 * @BATADV_CNT_MGMT_RX_BYTES: received routing protocol traffic bytes
	 *  counter
	 */
	BATADV_CNT_MGMT_RX_BYTES,

	/** @BATADV_CNT_FRAG_TX: transmitted fragment traffic packet counter */
	BATADV_CNT_FRAG_TX,

	/**
	 * @BATADV_CNT_FRAG_TX_BYTES: transmitted fragment traffic bytes counter
	 */
	BATADV_CNT_FRAG_TX_BYTES,

	/** @BATADV_CNT_FRAG_RX: received fragment traffic packet counter */
	BATADV_CNT_FRAG_RX,

	/**
	 * @BATADV_CNT_FRAG_RX_BYTES: received fragment traffic bytes counter
	 */
	BATADV_CNT_FRAG_RX_BYTES,

	/** @BATADV_CNT_FRAG_FWD: forwarded fragment traffic packet counter */
	BATADV_CNT_FRAG_FWD,

	/**
	 * @BATADV_CNT_FRAG_FWD_BYTES: forwarded fragment traffic bytes counter
	 */
	BATADV_CNT_FRAG_FWD_BYTES,

	/**
	 * @BATADV_CNT_TT_REQUEST_TX: transmitted tt req traffic packet counter
	 */
	BATADV_CNT_TT_REQUEST_TX,

	/** @BATADV_CNT_TT_REQUEST_RX: received tt req traffic packet counter */
	BATADV_CNT_TT_REQUEST_RX,

	/**
	 * @BATADV_CNT_TT_RESPONSE_TX: transmitted tt resp traffic packet
	 *  counter
	 */
	BATADV_CNT_TT_RESPONSE_TX,

	/**
	 * @BATADV_CNT_TT_RESPONSE_RX: received tt resp traffic packet counter
	 */
	BATADV_CNT_TT_RESPONSE_RX,

	/**
	 * @BATADV_CNT_TT_ROAM_ADV_TX: transmitted tt roam traffic packet
	 *  counter
	 */
	BATADV_CNT_TT_ROAM_ADV_TX,

	/**
	 * @BATADV_CNT_TT_ROAM_ADV_RX: received tt roam traffic packet counter
	 */
	BATADV_CNT_TT_ROAM_ADV_RX,

#ifdef CONFIG_BATMAN_ADV_DAT
	/**
	 * @BATADV_CNT_DAT_GET_TX: transmitted dht GET traffic packet counter
	 */
	BATADV_CNT_DAT_GET_TX,

	/** @BATADV_CNT_DAT_GET_RX: received dht GET traffic packet counter */
	BATADV_CNT_DAT_GET_RX,

	/**
	 * @BATADV_CNT_DAT_PUT_TX: transmitted dht PUT traffic packet counter
	 */
	BATADV_CNT_DAT_PUT_TX,

	/** @BATADV_CNT_DAT_PUT_RX: received dht PUT traffic packet counter */
	BATADV_CNT_DAT_PUT_RX,

	/**
	 * @BATADV_CNT_DAT_CACHED_REPLY_TX: transmitted dat cache reply traffic
	 *  packet counter
	 */
	BATADV_CNT_DAT_CACHED_REPLY_TX,
#endif

#ifdef CONFIG_BATMAN_ADV_NC
	/**
	 * @BATADV_CNT_NC_CODE: transmitted nc-combined traffic packet counter
	 */
	BATADV_CNT_NC_CODE,

	/**
	 * @BATADV_CNT_NC_CODE_BYTES: transmitted nc-combined traffic bytes
	 *  counter
	 */
	BATADV_CNT_NC_CODE_BYTES,

	/**
	 * @BATADV_CNT_NC_RECODE: transmitted nc-recombined traffic packet
	 *  counter
	 */
	BATADV_CNT_NC_RECODE,

	/**
	 * @BATADV_CNT_NC_RECODE_BYTES: transmitted nc-recombined traffic bytes
	 *  counter
	 */
	BATADV_CNT_NC_RECODE_BYTES,

	/**
	 * @BATADV_CNT_NC_BUFFER: counter for packets buffered for later nc
	 *  decoding
	 */
	BATADV_CNT_NC_BUFFER,

	/**
	 * @BATADV_CNT_NC_DECODE: received and nc-decoded traffic packet counter
	 */
	BATADV_CNT_NC_DECODE,

	/**
	 * @BATADV_CNT_NC_DECODE_BYTES: received and nc-decoded traffic bytes
	 *  counter
	 */
	BATADV_CNT_NC_DECODE_BYTES,

	/**
	 * @BATADV_CNT_NC_DECODE_FAILED: received and decode-failed traffic
	 *  packet counter
	 */
	BATADV_CNT_NC_DECODE_FAILED,

	/**
	 * @BATADV_CNT_NC_SNIFFED: counter for nc-decoded packets received in
	 *  promisc mode.
	 */
	BATADV_CNT_NC_SNIFFED,
#endif

	/** @BATADV_CNT_NUM: number of traffic counters */
	BATADV_CNT_NUM,
};

/**
 * struct batadv_priv_tt - per mesh interface translation table data
 */
struct batadv_priv_tt {
	/** @vn: translation table version number */
	atomic_t vn;

	/**
	 * @ogm_append_cnt: counter of number of OGMs containing the local tt
	 *  diff
	 */
	atomic_t ogm_append_cnt;

	/** @local_changes: changes registered in an originator interval */
	atomic_t local_changes;

	/**
	 * @changes_list: tracks tt local changes within an originator interval
	 */
	struct list_head changes_list;

	/** @local_hash: local translation table hash table */
	struct batadv_hashtable *local_hash;

	/** @global_hash: global translation table hash table */
	struct batadv_hashtable *global_hash;

	/** @req_list: list of pending & unanswered tt_requests */
	struct hlist_head req_list;

	/**
	 * @roam_list: list of the last roaming events of each client limiting
	 *  the number of roaming events to avoid route flapping
	 */
	struct list_head roam_list;

	/** @changes_list_lock: lock protecting changes_list */
	spinlock_t changes_list_lock;

	/** @req_list_lock: lock protecting req_list */
	spinlock_t req_list_lock;

	/** @roam_list_lock: lock protecting roam_list */
	spinlock_t roam_list_lock;

	/** @last_changeset: last tt changeset this host has generated */
	unsigned char *last_changeset;

	/**
	 * @last_changeset_len: length of last tt changeset this host has
	 *  generated
	 */
	s16 last_changeset_len;

	/**
	 * @last_changeset_lock: lock protecting last_changeset &
	 *  last_changeset_len
	 */
	spinlock_t last_changeset_lock;

	/**
	 * @commit_lock: prevents from executing a local TT commit while reading
	 *  the local table. The local TT commit is made up of two operations
	 *  (data structure update and metadata -CRC/TTVN- recalculation) and
	 *  they have to be executed atomically in order to avoid another thread
	 *  to read the table/metadata between those.
	 */
	spinlock_t commit_lock;

	/** @work: work queue callback item for translation table purging */
	struct delayed_work work;
};

#ifdef CONFIG_BATMAN_ADV_BLA

/**
 * struct batadv_priv_bla - per mesh interface bridge loop avoidance data
 */
struct batadv_priv_bla {
	/** @num_requests: number of bla requests in flight */
	atomic_t num_requests;

	/**
	 * @claim_hash: hash table containing mesh nodes this host has claimed
	 */
	struct batadv_hashtable *claim_hash;

	/**
	 * @backbone_hash: hash table containing all detected backbone gateways
	 */
	struct batadv_hashtable *backbone_hash;

	/** @loopdetect_addr: MAC address used for own loopdetection frames */
	u8 loopdetect_addr[ETH_ALEN];

	/**
	 * @loopdetect_lasttime: time when the loopdetection frames were sent
	 */
	unsigned long loopdetect_lasttime;

	/**
	 * @loopdetect_next: how many periods to wait for the next loopdetect
	 *  process
	 */
	atomic_t loopdetect_next;

	/**
	 * @bcast_duplist: recently received broadcast packets array (for
	 *  broadcast duplicate suppression)
	 */
	struct batadv_bcast_duplist_entry bcast_duplist[BATADV_DUPLIST_SIZE];

	/**
	 * @bcast_duplist_curr: index of last broadcast packet added to
	 *  bcast_duplist
	 */
	int bcast_duplist_curr;

	/**
	 * @bcast_duplist_lock: lock protecting bcast_duplist &
	 *  bcast_duplist_curr
	 */
	spinlock_t bcast_duplist_lock;

	/** @claim_dest: local claim data (e.g. claim group) */
	struct batadv_bla_claim_dst claim_dest;

	/** @work: work queue callback item for cleanups & bla announcements */
	struct delayed_work work;
};
#endif

#ifdef CONFIG_BATMAN_ADV_DEBUG

/**
 * struct batadv_priv_debug_log - debug logging data
 */
struct batadv_priv_debug_log {
	/** @log_buff: buffer holding the logs (ring buffer) */
	char log_buff[BATADV_LOG_BUF_LEN];

	/** @log_start: index of next character to read */
	unsigned long log_start;

	/** @log_end: index of next character to write */
	unsigned long log_end;

	/** @lock: lock protecting log_buff, log_start & log_end */
	spinlock_t lock;

	/** @queue_wait: log reader's wait queue */
	wait_queue_head_t queue_wait;
};
#endif

/**
 * struct batadv_priv_gw - per mesh interface gateway data
 */
struct batadv_priv_gw {
	/** @gateway_list: list of available gateway nodes */
	struct hlist_head gateway_list;

	/** @list_lock: lock protecting gateway_list, curr_gw, generation */
	spinlock_t list_lock;

	/** @curr_gw: pointer to currently selected gateway node */
	struct batadv_gw_node __rcu *curr_gw;

	/** @generation: current (generation) sequence number */
	unsigned int generation;

	/**
	 * @mode: gateway operation: off, client or server (see batadv_gw_modes)
	 */
	atomic_t mode;

	/** @sel_class: gateway selection class (applies if gw_mode client) */
	atomic_t sel_class;

	/**
	 * @bandwidth_down: advertised uplink download bandwidth (if gw_mode
	 *  server)
	 */
	atomic_t bandwidth_down;

	/**
	 * @bandwidth_up: advertised uplink upload bandwidth (if gw_mode server)
	 */
	atomic_t bandwidth_up;

	/** @reselect: bool indicating a gateway re-selection is in progress */
	atomic_t reselect;
};

/**
 * struct batadv_priv_tvlv - per mesh interface tvlv data
 */
struct batadv_priv_tvlv {
	/**
	 * @container_list: list of registered tvlv containers to be sent with
	 *  each OGM
	 */
	struct hlist_head container_list;

	/** @handler_list: list of the various tvlv content handlers */
	struct hlist_head handler_list;

	/** @container_list_lock: protects tvlv container list access */
	spinlock_t container_list_lock;

	/** @handler_list_lock: protects handler list access */
	spinlock_t handler_list_lock;
};

#ifdef CONFIG_BATMAN_ADV_DAT

/**
 * struct batadv_priv_dat - per mesh interface DAT private data
 */
struct batadv_priv_dat {
	/** @addr: node DAT address */
	batadv_dat_addr_t addr;

	/** @hash: hashtable representing the local ARP cache */
	struct batadv_hashtable *hash;

	/** @work: work queue callback item for cache purging */
	struct delayed_work work;
};
#endif

#ifdef CONFIG_BATMAN_ADV_MCAST
/**
 * struct batadv_mcast_querier_state - IGMP/MLD querier state when bridged
 */
struct batadv_mcast_querier_state {
	/** @exists: whether a querier exists in the mesh */
	unsigned char exists:1;

	/**
	 * @shadowing: if a querier exists, whether it is potentially shadowing
	 *  multicast listeners (i.e. querier is behind our own bridge segment)
	 */
	unsigned char shadowing:1;
};

/**
 * struct batadv_mcast_mla_flags - flags for the querier, bridge and tvlv state
 */
struct batadv_mcast_mla_flags {
	/** @querier_ipv4: the current state of an IGMP querier in the mesh */
	struct batadv_mcast_querier_state querier_ipv4;

	/** @querier_ipv6: the current state of an MLD querier in the mesh */
	struct batadv_mcast_querier_state querier_ipv6;

	/** @enabled: whether the multicast tvlv is currently enabled */
	unsigned char enabled:1;

	/** @bridged: whether the soft interface has a bridge on top */
	unsigned char bridged:1;

	/** @tvlv_flags: the flags we have last sent in our mcast tvlv */
	u8 tvlv_flags;
};

/**
 * struct batadv_priv_mcast - per mesh interface mcast data
 */
struct batadv_priv_mcast {
	/**
	 * @mla_list: list of multicast addresses we are currently announcing
	 *  via TT
	 */
	struct hlist_head mla_list; /* see __batadv_mcast_mla_update() */

	/**
	 * @want_all_unsnoopables_list: a list of orig_nodes wanting all
	 *  unsnoopable multicast traffic
	 */
	struct hlist_head want_all_unsnoopables_list;

	/**
	 * @want_all_ipv4_list: a list of orig_nodes wanting all IPv4 multicast
	 *  traffic
	 */
	struct hlist_head want_all_ipv4_list;

	/**
	 * @want_all_ipv6_list: a list of orig_nodes wanting all IPv6 multicast
	 *  traffic
	 */
	struct hlist_head want_all_ipv6_list;

	/**
	 * @want_all_rtr4_list: a list of orig_nodes wanting all routable IPv4
	 *  multicast traffic
	 */
	struct hlist_head want_all_rtr4_list;

	/**
	 * @want_all_rtr6_list: a list of orig_nodes wanting all routable IPv6
	 *  multicast traffic
	 */
	struct hlist_head want_all_rtr6_list;

	/**
	 * @mla_flags: flags for the querier, bridge and tvlv state
	 */
	struct batadv_mcast_mla_flags mla_flags;

	/**
	 * @mla_lock: a lock protecting mla_list and mla_flags
	 */
	spinlock_t mla_lock;

	/**
	 * @num_want_all_unsnoopables: number of nodes wanting unsnoopable IP
	 *  traffic
	 */
	atomic_t num_want_all_unsnoopables;

	/** @num_want_all_ipv4: counter for items in want_all_ipv4_list */
	atomic_t num_want_all_ipv4;

	/** @num_want_all_ipv6: counter for items in want_all_ipv6_list */
	atomic_t num_want_all_ipv6;

	/** @num_want_all_rtr4: counter for items in want_all_rtr4_list */
	atomic_t num_want_all_rtr4;

	/** @num_want_all_rtr6: counter for items in want_all_rtr6_list */
	atomic_t num_want_all_rtr6;

	/**
	 * @want_lists_lock: lock for protecting modifications to mcasts
	 *  want_all_{unsnoopables,ipv4,ipv6}_list (traversals are rcu-locked)
	 */
	spinlock_t want_lists_lock;

	/** @work: work queue callback item for multicast TT and TVLV updates */
	struct delayed_work work;
};
#endif

/**
 * struct batadv_priv_nc - per mesh interface network coding private data
 */
struct batadv_priv_nc {
	/** @work: work queue callback item for cleanup */
	struct delayed_work work;

	/**
	 * @min_tq: only consider neighbors for encoding if neigh_tq > min_tq
	 */
	u8 min_tq;

	/**
	 * @max_fwd_delay: maximum packet forward delay to allow coding of
	 *  packets
	 */
	u32 max_fwd_delay;

	/**
	 * @max_buffer_time: buffer time for sniffed packets used to decoding
	 */
	u32 max_buffer_time;

	/**
	 * @timestamp_fwd_flush: timestamp of last forward packet queue flush
	 */
	unsigned long timestamp_fwd_flush;

	/**
	 * @timestamp_sniffed_purge: timestamp of last sniffed packet queue
	 *  purge
	 */
	unsigned long timestamp_sniffed_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
	 */
	struct batadv_hashtable *coding_hash;

	/**
	 * @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_hashtable *decoding_hash;
};

/**
 * struct batadv_tp_unacked - unacked packet meta-information
 *
 * This struct is supposed to represent a buffer unacked packet. However, since
 * the purpose of the TP meter is to count the traffic only, there is no need to
 * store the entire sk_buff, the starting offset and the length are enough
 */
struct batadv_tp_unacked {
	/** @seqno: seqno of the unacked packet */
	u32 seqno;

	/** @len: length of the packet */
	u16 len;

	/** @list: list node for &batadv_tp_vars.unacked_list */
	struct list_head list;
};

/**
 * enum batadv_tp_meter_role - Modus in tp meter session
 */
enum batadv_tp_meter_role {
	/** @BATADV_TP_RECEIVER: Initialized as receiver */
	BATADV_TP_RECEIVER,

	/** @BATADV_TP_SENDER: Initialized as sender */
	BATADV_TP_SENDER
};

/**
 * struct batadv_tp_vars - tp meter private variables per session
 */
struct batadv_tp_vars {
	/** @list: list node for &bat_priv.tp_list */
	struct hlist_node list;

	/** @timer: timer for ack (receiver) and retry (sender) */
	struct timer_list timer;

	/** @bat_priv: pointer to the mesh object */
	struct batadv_priv *bat_priv;

	/** @start_time: start time in jiffies */
	unsigned long start_time;

	/** @other_end: mac address of remote */
	u8 other_end[ETH_ALEN];

	/** @role: receiver/sender modi */
	enum batadv_tp_meter_role role;

	/** @sending: sending binary semaphore: 1 if sending, 0 is not */
	atomic_t sending;

	/** @reason: reason for a stopped session */
	enum batadv_tp_meter_reason reason;

	/** @finish_work: work item for the finishing procedure */
	struct delayed_work finish_work;

	/** @test_length: test length in milliseconds */
	u32 test_length;

	/** @session: TP session identifier */
	u8 session[2];

	/** @icmp_uid: local ICMP "socket" index */
	u8 icmp_uid;

	/* sender variables */

	/** @dec_cwnd: decimal part of the cwnd used during linear growth */
	u16 dec_cwnd;

	/** @cwnd: current size of the congestion window */
	u32 cwnd;

	/** @cwnd_lock: lock do protect @cwnd & @dec_cwnd */
	spinlock_t cwnd_lock;

	/**
	 * @ss_threshold: Slow Start threshold. Once cwnd exceeds this value the
	 *  connection switches to the Congestion Avoidance state
	 */
	u32 ss_threshold;

	/** @last_acked: last acked byte */
	atomic_t last_acked;

	/** @last_sent: last sent byte, not yet acked */
	u32 last_sent;

	/** @tot_sent: amount of data sent/ACKed so far */
	atomic64_t tot_sent;

	/** @dup_acks: duplicate ACKs counter */
	atomic_t dup_acks;

	/** @fast_recovery: true if in Fast Recovery mode */
	unsigned char fast_recovery:1;

	/** @recover: last sent seqno when entering Fast Recovery */
	u32 recover;

	/** @rto: sender timeout */
	u32 rto;

	/** @srtt: smoothed RTT scaled by 2^3 */
	u32 srtt;

	/** @rttvar: RTT variation scaled by 2^2 */
	u32 rttvar;

	/**
	 * @more_bytes: waiting queue anchor when waiting for more ack/retry
	 *  timeout
	 */
	wait_queue_head_t more_bytes;

	/** @prerandom_offset: offset inside the prerandom buffer */
	u32 prerandom_offset;

	/** @prerandom_lock: spinlock protecting access to prerandom_offset */
	spinlock_t prerandom_lock;

	/* receiver variables */

	/** @last_recv: last in-order received packet */
	u32 last_recv;

	/** @unacked_list: list of unacked packets (meta-info only) */
	struct list_head unacked_list;

	/** @unacked_lock: protect unacked_list */
	spinlock_t unacked_lock;

	/** @last_recv_time: time (jiffies) a msg was received */
	unsigned long last_recv_time;

	/** @refcount: number of context where the object is used */
	struct kref refcount;

	/** @rcu: struct used for freeing in an RCU-safe manner */
	struct rcu_head rcu;
};

/**
 * struct batadv_softif_vlan - per VLAN attributes set
 */
struct batadv_softif_vlan {
	/** @bat_priv: pointer to the mesh object */
	struct batadv_priv *bat_priv;

	/** @vid: VLAN identifier */
	unsigned short vid;

	/** @ap_isolation: AP isolation state */
	atomic_t ap_isolation;		/* boolean */

	/** @tt: TT private attributes (VLAN specific) */
	struct batadv_vlan_tt tt;

	/** @list: list node for &bat_priv.softif_vlan_list */
	struct hlist_node list;

	/**
	 * @refcount: number of context where this object is currently in use
	 */
	struct kref refcount;

	/** @rcu: struct used for freeing in a RCU-safe manner */
	struct rcu_head rcu;
};

/**
 * struct batadv_priv_bat_v - B.A.T.M.A.N. V per soft-interface private data
 */
struct batadv_priv_bat_v {
	/** @ogm_buff: buffer holding the OGM packet */
	unsigned char *ogm_buff;

	/** @ogm_buff_len: length of the OGM packet buffer */
	int ogm_buff_len;

	/** @ogm_seqno: OGM sequence number - used to identify each OGM */
	atomic_t ogm_seqno;

	/** @ogm_buff_mutex: lock protecting ogm_buff and ogm_buff_len */
	struct mutex ogm_buff_mutex;

	/** @ogm_wq: workqueue used to schedule OGM transmissions */
	struct delayed_work ogm_wq;
};

/**
 * struct batadv_priv - per mesh interface data
 */
struct batadv_priv {
	/**
	 * @mesh_state: current status of the mesh
	 *  (inactive/active/deactivating)
	 */
	atomic_t mesh_state;

	/** @soft_iface: net device which holds this struct as private data */
	struct net_device *soft_iface;

	/**
	 * @bat_counters: mesh internal traffic statistic counters (see
	 *  batadv_counters)
	 */
	u64 __percpu *bat_counters; /* Per cpu counters */

	/**
	 * @aggregated_ogms: bool indicating whether OGM aggregation is enabled
	 */
	atomic_t aggregated_ogms;

	/** @bonding: bool indicating whether traffic bonding is enabled */
	atomic_t bonding;

	/**
	 * @fragmentation: bool indicating whether traffic fragmentation is
	 *  enabled
	 */
	atomic_t fragmentation;

	/**
	 * @packet_size_max: max packet size that can be transmitted via
	 *  multiple fragmented skbs or a single frame if fragmentation is
	 *  disabled
	 */
	atomic_t packet_size_max;

	/**
	 * @frag_seqno: incremental counter to identify chains of egress
	 *  fragments
	 */
	atomic_t frag_seqno;

#ifdef CONFIG_BATMAN_ADV_BLA
	/**
	 * @bridge_loop_avoidance: bool indicating whether bridge loop
	 *  avoidance is enabled
	 */
	atomic_t bridge_loop_avoidance;
#endif

#ifdef CONFIG_BATMAN_ADV_DAT
	/**
	 * @distributed_arp_table: bool indicating whether distributed ARP table
	 *  is enabled
	 */
	atomic_t distributed_arp_table;
#endif

#ifdef CONFIG_BATMAN_ADV_MCAST
	/**
	 * @multicast_mode: Enable or disable multicast optimizations on this
	 *  node's sender/originating side
	 */
	atomic_t multicast_mode;

	/**
	 * @multicast_fanout: Maximum number of packet copies to generate for a
	 *  multicast-to-unicast conversion
	 */
	atomic_t multicast_fanout;
#endif

	/** @orig_interval: OGM broadcast interval in milliseconds */
	atomic_t orig_interval;

	/**
	 * @hop_penalty: penalty which will be applied to an OGM's tq-field on
	 *  every hop
	 */
	atomic_t hop_penalty;

#ifdef CONFIG_BATMAN_ADV_DEBUG
	/** @log_level: configured log level (see batadv_dbg_level) */
	atomic_t log_level;
#endif

	/**
	 * @isolation_mark: the skb->mark value used to match packets for AP
	 *  isolation
	 */
	u32 isolation_mark;

	/**
	 * @isolation_mark_mask: bitmask identifying the bits in skb->mark to be
	 *  used for the isolation mark
	 */
	u32 isolation_mark_mask;

	/** @bcast_seqno: last sent broadcast packet sequence number */
	atomic_t bcast_seqno;

	/**
	 * @bcast_queue_left: number of remaining buffered broadcast packet
	 *  slots
	 */
	atomic_t bcast_queue_left;

	/** @batman_queue_left: number of remaining OGM packet slots */
	atomic_t batman_queue_left;

	/** @forw_bat_list: list of aggregated OGMs that will be forwarded */
	struct hlist_head forw_bat_list;

	/**
	 * @forw_bcast_list: list of broadcast packets that will be
	 *  rebroadcasted
	 */
	struct hlist_head forw_bcast_list;

	/** @tp_list: list of tp sessions */
	struct hlist_head tp_list;

	/** @orig_hash: hash table containing mesh participants (orig nodes) */
	struct batadv_hashtable *orig_hash;

	/** @forw_bat_list_lock: lock protecting forw_bat_list */
	spinlock_t forw_bat_list_lock;

	/** @forw_bcast_list_lock: lock protecting forw_bcast_list */
	spinlock_t forw_bcast_list_lock;

	/** @tp_list_lock: spinlock protecting @tp_list */
	spinlock_t tp_list_lock;

	/** @tp_num: number of currently active tp sessions */
	atomic_t tp_num;

	/** @orig_work: work queue callback item for orig node purging */
	struct delayed_work orig_work;

	/**
	 * @primary_if: one of the hard-interfaces assigned to this mesh
	 *  interface becomes the primary interface
	 */
	struct batadv_hard_iface __rcu *primary_if;  /* rcu protected pointer */

	/** @algo_ops: routing algorithm used by this mesh interface */
	struct batadv_algo_ops *algo_ops;

	/**
	 * @softif_vlan_list: a list of softif_vlan structs, one per VLAN
	 *  created on top of the mesh interface represented by this object
	 */
	struct hlist_head softif_vlan_list;

	/** @softif_vlan_list_lock: lock protecting softif_vlan_list */
	spinlock_t softif_vlan_list_lock;

#ifdef CONFIG_BATMAN_ADV_BLA
	/** @bla: bridge loop avoidance data */
	struct batadv_priv_bla bla;
#endif

#ifdef CONFIG_BATMAN_ADV_DEBUG
	/** @debug_log: holding debug logging relevant data */
	struct batadv_priv_debug_log *debug_log;
#endif

	/** @gw: gateway data */
	struct batadv_priv_gw gw;

	/** @tt: translation table data */
	struct batadv_priv_tt tt;

	/** @tvlv: type-version-length-value data */
	struct batadv_priv_tvlv tvlv;

#ifdef CONFIG_BATMAN_ADV_DAT
	/** @dat: distributed arp table data */
	struct batadv_priv_dat dat;
#endif

#ifdef CONFIG_BATMAN_ADV_MCAST
	/** @mcast: multicast data */
	struct batadv_priv_mcast mcast;
#endif

#ifdef CONFIG_BATMAN_ADV_NC
	/**
	 * @network_coding: bool indicating whether network coding is enabled
	 */
	atomic_t network_coding;

	/** @nc: network coding data */
	struct batadv_priv_nc nc;
#endif /* CONFIG_BATMAN_ADV_NC */

#ifdef CONFIG_BATMAN_ADV_BATMAN_V
	/** @bat_v: B.A.T.M.A.N. V per soft-interface private data */
	struct batadv_priv_bat_v bat_v;
#endif
};

#ifdef CONFIG_BATMAN_ADV_BLA

/**
 * struct batadv_bla_backbone_gw - batman-adv gateway bridged into the LAN
 */
struct batadv_bla_backbone_gw {
	/**
	 * @orig: originator address of backbone node (mac address of primary
	 *  iface)
	 */
	u8 orig[ETH_ALEN];

	/** @vid: vlan id this gateway was detected on */
	unsigned short vid;

	/** @hash_entry: hlist node for &batadv_priv_bla.backbone_hash */
	struct hlist_node hash_entry;

	/** @bat_priv: pointer to soft_iface this backbone gateway belongs to */
	struct batadv_priv *bat_priv;

	/** @lasttime: last time we heard of this backbone gw */
	unsigned long lasttime;

	/**
	 * @wait_periods: grace time for bridge forward delays and bla group
	 *  forming at bootup phase - no bcast traffic is formwared until it has
	 *  elapsed
	 */
	atomic_t wait_periods;

	/**
	 * @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
	 */
	atomic_t request_sent;

	/** @crc: crc16 checksum over all claims */
	u16 crc;

	/** @crc_lock: lock protecting crc */
	spinlock_t crc_lock;

	/** @report_work: work struct for reporting detected loops */
	struct work_struct report_work;

	/** @refcount: number of contexts the object is used */
	struct kref refcount;

	/** @rcu: struct used for freeing in an RCU-safe manner */
	struct rcu_head rcu;
};

/**
 * struct batadv_bla_claim - claimed non-mesh client structure
 */
struct batadv_bla_claim {
	/** @addr: mac address of claimed non-mesh client */
	u8 addr[ETH_ALEN];

	/** @vid: vlan id this client was detected on */
	unsigned short vid;

	/** @backbone_gw: pointer to backbone gw claiming this client */
	struct batadv_bla_backbone_gw *backbone_gw;

	/** @backbone_lock: lock protecting backbone_gw pointer */
	spinlock_t backbone_lock;

	/** @lasttime: last time we heard of claim (locals only) */
	unsigned long lasttime;

	/** @hash_entry: hlist node for &batadv_priv_bla.claim_hash */
	struct hlist_node hash_entry;

	/** @refcount: number of contexts the object is used */
	struct rcu_head rcu;

	/** @rcu: struct used for freeing in an RCU-safe manner */
	struct kref refcount;
};
#endif

/**
 * struct batadv_tt_common_entry - tt local & tt global common data
 */
struct batadv_tt_common_entry {
	/** @addr: mac address of non-mesh client */
	u8 addr[ETH_ALEN];

	/** @vid: VLAN identifier */
	unsigned short vid;

	/**
	 * @hash_entry: hlist node for &batadv_priv_tt.local_hash or for
	 *  &batadv_priv_tt.global_hash
	 */
	struct hlist_node hash_entry;

	/** @flags: various state handling flags (see batadv_tt_client_flags) */
	u16 flags;

	/** @added_at: timestamp used for purging stale tt common entries */
	unsigned long added_at;

	/** @refcount: number of contexts the object is used */
	struct kref refcount;

	/** @rcu: struct used for freeing in an RCU-safe manner */
	struct rcu_head rcu;
};

/**
 * struct batadv_tt_local_entry - translation table local entry data
 */
struct batadv_tt_local_entry {
	/** @common: general translation table data */
	struct batadv_tt_common_entry common;

	/** @last_seen: timestamp used for purging stale tt local entries */
	unsigned long last_seen;

	/** @vlan: soft-interface vlan of the entry */
	struct batadv_softif_vlan *vlan;
};

/**
 * struct batadv_tt_global_entry - translation table global entry data
 */
struct batadv_tt_global_entry {
	/** @common: general translation table data */
	struct batadv_tt_common_entry common;

	/** @orig_list: list of orig nodes announcing this non-mesh client */
	struct hlist_head orig_list;

	/** @orig_list_count: number of items in the orig_list */
	atomic_t orig_list_count;

	/** @list_lock: lock protecting orig_list */
	spinlock_t list_lock;

	/** @roam_at: time at which TT_GLOBAL_ROAM was set */
	unsigned long roam_at;
};

/**
 * struct batadv_tt_orig_list_entry - orig node announcing a non-mesh client
 */
struct batadv_tt_orig_list_entry {
	/** @orig_node: pointer to orig node announcing this non-mesh client */
	struct batadv_orig_node *orig_node;

	/**
	 * @ttvn: translation table version number which added the non-mesh
	 *  client
	 */
	u8 ttvn;

	/** @flags: per orig entry TT sync flags */
	u8 flags;

	/** @list: list node for &batadv_tt_global_entry.orig_list */
	struct hlist_node list;

	/** @refcount: number of contexts the object is used */
	struct kref refcount;

	/** @rcu: struct used for freeing in an RCU-safe manner */
	struct rcu_head rcu;
};

/**
 * struct batadv_tt_change_node - structure for tt changes occurred
 */
struct batadv_tt_change_node {
	/** @list: list node for &batadv_priv_tt.changes_list */
	struct list_head list;

	/** @change: holds the actual translation table diff data */
	struct batadv_tvlv_tt_change change;
};

/**
 * struct batadv_tt_req_node - data to keep track of the tt requests in flight
 */
struct batadv_tt_req_node {
	/**
	 * @addr: mac address of the originator this request was sent to
	 */
	u8 addr[ETH_ALEN];

	/** @issued_at: timestamp used for purging stale tt requests */
	unsigned long issued_at;

	/** @refcount: number of contexts the object is used by */
	struct kref refcount;

	/** @list: list node for &batadv_priv_tt.req_list */
	struct hlist_node list;
};

/**
 * struct batadv_tt_roam_node - roaming client data
 */
struct batadv_tt_roam_node {
	/** @addr: mac address of the client in the roaming phase */
	u8 addr[ETH_ALEN];

	/**
	 * @counter: number of allowed roaming events per client within a single
	 * OGM interval (changes are committed with each OGM)
	 */
	atomic_t counter;

	/**
	 * @first_time: timestamp used for purging stale roaming node entries
	 */
	unsigned long first_time;

	/** @list: list node for &batadv_priv_tt.roam_list */
	struct list_head list;
};

/**
 * struct batadv_nc_node - network coding node
 */
struct batadv_nc_node {
	/** @list: next and prev pointer for the list handling */
	struct list_head list;

	/** @addr: the node's mac address */
	u8 addr[ETH_ALEN];

	/** @refcount: number of contexts the object is used by */
	struct kref refcount;

	/** @rcu: struct used for freeing in an RCU-safe manner */
	struct rcu_head rcu;

	/** @orig_node: pointer to corresponding orig node struct */
	struct batadv_orig_node *orig_node;

	/** @last_seen: timestamp of last ogm received from this node */
	unsigned long last_seen;
};

/**
 * struct batadv_nc_path - network coding path
 */
struct batadv_nc_path {
	/** @hash_entry: next and prev pointer for the list handling */
	struct hlist_node hash_entry;

	/** @rcu: struct used for freeing in an RCU-safe manner */
	struct rcu_head rcu;

	/** @refcount: number of contexts the object is used by */
	struct kref refcount;

	/** @packet_list: list of buffered packets for this path */
	struct list_head packet_list;

	/** @packet_list_lock: access lock for packet list */
	spinlock_t packet_list_lock;

	/** @next_hop: next hop (destination) of path */
	u8 next_hop[ETH_ALEN];

	/** @prev_hop: previous hop (source) of path */
	u8 prev_hop[ETH_ALEN];

	/** @last_valid: timestamp for last validation of path */
	unsigned long last_valid;
};

/**
 * struct batadv_nc_packet - network coding packet used when coding and
 *  decoding packets
 */
struct batadv_nc_packet {
	/** @list: next and prev pointer for the list handling */
	struct list_head list;

	/** @packet_id: crc32 checksum of skb data */
	__be32 packet_id;

	/**
	 * @timestamp: field containing the info when the packet was added to
	 *  path
	 */
	unsigned long timestamp;

	/** @neigh_node: pointer to original next hop neighbor of skb */
	struct batadv_neigh_node *neigh_node;

	/** @skb: skb which can be encoded or used for decoding */
	struct sk_buff *skb;

	/** @nc_path: pointer to path this nc packet is attached to */
	struct batadv_nc_path *nc_path;
};

/**
 * struct batadv_skb_cb - control buffer structure used to store private data
 *  relevant to batman-adv in the skb->cb buffer in skbs.
 */
struct batadv_skb_cb {
	/**
	 * @decoded: Marks a skb as decoded, which is checked when searching for
	 *  coding opportunities in network-coding.c
	 */
	unsigned char decoded:1;

	/** @num_bcasts: Counter for broadcast packet retransmissions */
	unsigned char num_bcasts;
};

/**
 * struct batadv_forw_packet - structure for bcast packets to be sent/forwarded
 */
struct batadv_forw_packet {
	/**
	 * @list: list node for &batadv_priv.forw.bcast_list and
	 *  &batadv_priv.forw.bat_list
	 */
	struct hlist_node list;

	/** @cleanup_list: list node for purging functions */
	struct hlist_node cleanup_list;

	/** @send_time: execution time for delayed_work (packet sending) */
	unsigned long send_time;

	/**
	 * @own: bool for locally generated packets (local OGMs are re-scheduled
	 * after sending)
	 */
	u8 own;

	/** @skb: bcast packet's skb buffer */
	struct sk_buff *skb;

	/** @packet_len: size of aggregated OGM packet inside the skb buffer */
	u16 packet_len;

	/** @direct_link_flags: direct link flags for aggregated OGM packets */
	u32 direct_link_flags;

	/** @num_packets: counter for aggregated OGMv1 packets */
	u8 num_packets;

	/** @delayed_work: work queue callback item for packet sending */
	struct delayed_work delayed_work;

	/**
	 * @if_incoming: pointer to incoming hard-iface or primary iface if
	 *  locally generated packet
	 */
	struct batadv_hard_iface *if_incoming;

	/**
	 * @if_outgoing: packet where the packet should be sent to, or NULL if
	 *  unspecified
	 */
	struct batadv_hard_iface *if_outgoing;

	/** @queue_left: The queue (counter) this packet was applied to */
	atomic_t *queue_left;
};

/**
 * struct batadv_algo_iface_ops - mesh algorithm callbacks (interface specific)
 */
struct batadv_algo_iface_ops {
	/**
	 * @activate: start routing mechanisms when hard-interface is brought up
	 *  (optional)
	 */
	void (*activate)(struct batadv_hard_iface *hard_iface);

	/** @enable: init routing info when hard-interface is enabled */
	int (*enable)(struct batadv_hard_iface *hard_iface);

	/** @enabled: notification when hard-interface was enabled (optional) */
	void (*enabled)(struct batadv_hard_iface *hard_iface);

	/** @disable: de-init routing info when hard-interface is disabled */
	void (*disable)(struct batadv_hard_iface *hard_iface);

	/**
	 * @update_mac: (re-)init mac addresses of the protocol information
	 *  belonging to this hard-interface
	 */
	void (*update_mac)(struct batadv_hard_iface *hard_iface);

	/** @primary_set: called when primary interface is selected / changed */
	void (*primary_set)(struct batadv_hard_iface *hard_iface);
};

/**
 * struct batadv_algo_neigh_ops - mesh algorithm callbacks (neighbour specific)
 */
struct batadv_algo_neigh_ops {
	/** @hardif_init: called on creation of single hop entry (optional) */
	void (*hardif_init)(struct batadv_hardif_neigh_node *neigh);

	/**
	 * @cmp: compare the metrics of two neighbors for their respective
	 *  outgoing interfaces
	 */
	int (*cmp)(struct batadv_neigh_node *neigh1,
		   struct batadv_hard_iface *if_outgoing1,
		   struct batadv_neigh_node *neigh2,
		   struct batadv_hard_iface *if_outgoing2);

	/**
	 * @is_similar_or_better: check if neigh1 is equally similar or better
	 *  than neigh2 for their respective outgoing interface from the metric
	 *  prospective
	 */
	bool (*is_similar_or_better)(struct batadv_neigh_node *neigh1,
				     struct batadv_hard_iface *if_outgoing1,
				     struct batadv_neigh_node *neigh2,
				     struct batadv_hard_iface *if_outgoing2);

	/** @dump: dump neighbors to a netlink socket (optional) */
	void (*dump)(struct sk_buff *msg, struct netlink_callback *cb,
		     struct batadv_priv *priv,
		     struct batadv_hard_iface *hard_iface);
};

/**
 * struct batadv_algo_orig_ops - mesh algorithm callbacks (originator specific)
 */
struct batadv_algo_orig_ops {
	/** @dump: dump originators to a netlink socket (optional) */
	void (*dump)(struct sk_buff *msg, struct netlink_callback *cb,
		     struct batadv_priv *priv,
		     struct batadv_hard_iface *hard_iface);
};

/**
 * struct batadv_algo_gw_ops - mesh algorithm callbacks (GW specific)
 */
struct batadv_algo_gw_ops {
	/** @init_sel_class: initialize GW selection class (optional) */
	void (*init_sel_class)(struct batadv_priv *bat_priv);

	/**
	 * @store_sel_class: parse and stores a new GW selection class
	 *  (optional)
	 */
	ssize_t (*store_sel_class)(struct batadv_priv *bat_priv, char *buff,
				   size_t count);
	/**
	 * @get_best_gw_node: select the best GW from the list of available
	 *  nodes (optional)
	 */
	struct batadv_gw_node *(*get_best_gw_node)
		(struct batadv_priv *bat_priv);

	/**
	 * @is_eligible: check if a newly discovered GW is a potential candidate
	 *  for the election as best GW (optional)
	 */
	bool (*is_eligible)(struct batadv_priv *bat_priv,
			    struct batadv_orig_node *curr_gw_orig,
			    struct batadv_orig_node *orig_node);

	/** @dump: dump gateways to a netlink socket (optional) */
	void (*dump)(struct sk_buff *msg, struct netlink_callback *cb,
		     struct batadv_priv *priv);
};

/**
 * struct batadv_algo_ops - mesh algorithm callbacks
 */
struct batadv_algo_ops {
	/** @list: list node for the batadv_algo_list */
	struct hlist_node list;

	/** @name: name of the algorithm */
	char *name;

	/** @iface: callbacks related to interface handling */
	struct batadv_algo_iface_ops iface;

	/** @neigh: callbacks related to neighbors handling */
	struct batadv_algo_neigh_ops neigh;

	/** @orig: callbacks related to originators handling */
	struct batadv_algo_orig_ops orig;

	/** @gw: callbacks related to GW mode */
	struct batadv_algo_gw_ops gw;
};

/**
 * 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
 */
struct batadv_dat_entry {
	/** @ip: the IPv4 corresponding to this DAT/ARP entry */
	__be32 ip;

	/** @mac_addr: the MAC address associated to the stored IPv4 */
	u8 mac_addr[ETH_ALEN];

	/** @vid: the vlan ID associated to this entry */
	unsigned short vid;

	/**
	 * @last_update: time in jiffies when this entry was refreshed last time
	 */
	unsigned long last_update;

	/** @hash_entry: hlist node for &batadv_priv_dat.hash */
	struct hlist_node hash_entry;

	/** @refcount: number of contexts the object is used */
	struct kref refcount;

	/** @rcu: struct used for freeing in an RCU-safe manner */
	struct rcu_head rcu;
};

/**
 * struct batadv_hw_addr - a list entry for a MAC address
 */
struct batadv_hw_addr {
	/** @list: list node for the linking of entries */
	struct hlist_node list;

	/** @addr: the MAC address of this list entry */
	unsigned char addr[ETH_ALEN];
};

/**
 * struct batadv_dat_candidate - candidate destination for DAT operations
 */
struct batadv_dat_candidate {
	/**
	 * @type: the type of the selected candidate. It can one of the
	 *  following:
	 *	  - BATADV_DAT_CANDIDATE_NOT_FOUND
	 *	  - BATADV_DAT_CANDIDATE_ORIG
	 */
	int type;

	/**
	 * @orig_node: if type is BATADV_DAT_CANDIDATE_ORIG this field points to
	 * the corresponding originator node structure
	 */
	struct batadv_orig_node *orig_node;
};

/**
 * struct batadv_tvlv_container - container for tvlv appended to OGMs
 */
struct batadv_tvlv_container {
	/** @list: hlist node for &batadv_priv_tvlv.container_list */
	struct hlist_node list;

	/** @tvlv_hdr: tvlv header information needed to construct the tvlv */
	struct batadv_tvlv_hdr tvlv_hdr;

	/** @refcount: number of contexts the object is used */
	struct kref refcount;
};

/**
 * struct batadv_tvlv_handler - handler for specific tvlv type and version
 */
struct batadv_tvlv_handler {
	/** @list: hlist node for &batadv_priv_tvlv.handler_list */
	struct hlist_node list;

	/**
	 * @ogm_handler: handler callback which is given the tvlv payload to
	 *  process on incoming OGM packets
	 */
	void (*ogm_handler)(struct batadv_priv *bat_priv,
			    struct batadv_orig_node *orig,
			    u8 flags, void *tvlv_value, u16 tvlv_value_len);

	/**
	 * @unicast_handler: handler callback which is given the tvlv payload to
	 *  process on incoming unicast tvlv packets
	 */
	int (*unicast_handler)(struct batadv_priv *bat_priv,
			       u8 *src, u8 *dst,
			       void *tvlv_value, u16 tvlv_value_len);

	/**
	 * @mcast_handler: handler callback which is given the tvlv payload to
	 *  process on incoming mcast packet
	 */
	int (*mcast_handler)(struct batadv_priv *bat_priv, struct sk_buff *skb);

	/** @type: tvlv type this handler feels responsible for */
	u8 type;

	/** @version: tvlv version this handler feels responsible for */
	u8 version;

	/** @flags: tvlv handler flags */
	u8 flags;

	/** @refcount: number of contexts the object is used */
	struct kref refcount;

	/** @rcu: struct used for freeing in an RCU-safe manner */
	struct rcu_head rcu;
};

/**
 * enum batadv_tvlv_handler_flags - tvlv handler flags definitions
 */
enum batadv_tvlv_handler_flags {
	/**
	 * @BATADV_TVLV_HANDLER_OGM_CIFNOTFND: tvlv ogm processing function
	 *  will call this handler even if its type was not found (with no data)
	 */
	BATADV_TVLV_HANDLER_OGM_CIFNOTFND = BIT(1),

	/**
	 * @BATADV_TVLV_HANDLER_OGM_CALLED: interval tvlv handling flag - the
	 *  API marks a handler as being called, so it won't be called if the
	 *  BATADV_TVLV_HANDLER_OGM_CIFNOTFND flag was set
	 */
	BATADV_TVLV_HANDLER_OGM_CALLED = BIT(2),
};

#endif /* _NET_BATMAN_ADV_TYPES_H_ */