Training courses

Kernel and Embedded Linux

Bootlin training courses

Embedded Linux, kernel,
Yocto Project, Buildroot, real-time,
graphics, boot time, debugging...

Bootlin logo

Elixir Cross Referencer

   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
/*-
 * Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from the Stanford/CMU enet packet filter,
 * (net/enet.c) distributed as part of 4.3BSD, and code contributed
 * to Berkeley by Steven McCanne and Van Jacobson both of Lawrence
 * Berkeley Laboratory.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      @(#)bpf.h       7.1 (Berkeley) 5/7/91
 */

#ifndef lib_pcap_dlt_h
#define lib_pcap_dlt_h

/*
 * Link-layer header type codes.
 *
 * Do *NOT* add new values to this list without asking
 * "tcpdump-workers@lists.tcpdump.org" for a value.  Otherwise, you run
 * the risk of using a value that's already being used for some other
 * purpose, and of having tools that read libpcap-format captures not
 * being able to handle captures with your new DLT_ value, with no hope
 * that they will ever be changed to do so (as that would destroy their
 * ability to read captures using that value for that other purpose).
 *
 * See
 *
 *	https://www.tcpdump.org/linktypes.html
 *
 * for detailed descriptions of some of these link-layer header types.
 */

/*
 * These are the types that are the same on all platforms, and that
 * have been defined by <net/bpf.h> for ages.
 */
#define DLT_NULL	0	/* BSD loopback encapsulation */
#define DLT_EN10MB	1	/* Ethernet (10Mb) */
#define DLT_EN3MB	2	/* Experimental Ethernet (3Mb) */
#define DLT_AX25	3	/* Amateur Radio AX.25 */
#define DLT_PRONET	4	/* Proteon ProNET Token Ring */
#define DLT_CHAOS	5	/* Chaos */
#define DLT_IEEE802	6	/* 802.5 Token Ring */
#define DLT_ARCNET	7	/* ARCNET, with BSD-style header */
#define DLT_SLIP	8	/* Serial Line IP */
#define DLT_PPP		9	/* Point-to-point Protocol */
#define DLT_FDDI	10	/* FDDI */

/*
 * These are types that are different on some platforms, and that
 * have been defined by <net/bpf.h> for ages.  We use #ifdefs to
 * detect the BSDs that define them differently from the traditional
 * libpcap <net/bpf.h>
 *
 * XXX - DLT_ATM_RFC1483 is 13 in BSD/OS, and DLT_RAW is 14 in BSD/OS,
 * but I don't know what the right #define is for BSD/OS.
 */
#define DLT_ATM_RFC1483	11	/* LLC-encapsulated ATM */

#ifdef __OpenBSD__
#define DLT_RAW		14	/* raw IP */
#else
#define DLT_RAW		12	/* raw IP */
#endif

/*
 * Given that the only OS that currently generates BSD/OS SLIP or PPP
 * is, well, BSD/OS, arguably everybody should have chosen its values
 * for DLT_SLIP_BSDOS and DLT_PPP_BSDOS, which are 15 and 16, but they
 * didn't.  So it goes.
 */
#if defined(__NetBSD__) || defined(__FreeBSD__)
#ifndef DLT_SLIP_BSDOS
#define DLT_SLIP_BSDOS	13	/* BSD/OS Serial Line IP */
#define DLT_PPP_BSDOS	14	/* BSD/OS Point-to-point Protocol */
#endif
#else
#define DLT_SLIP_BSDOS	15	/* BSD/OS Serial Line IP */
#define DLT_PPP_BSDOS	16	/* BSD/OS Point-to-point Protocol */
#endif

/*
 * 17 was used for DLT_PFLOG in OpenBSD; it no longer is.
 *
 * It was DLT_LANE8023 in SuSE 6.3, so we defined LINKTYPE_PFLOG
 * as 117 so that pflog captures would use a link-layer header type
 * value that didn't collide with any other values.  On all
 * platforms other than OpenBSD, we defined DLT_PFLOG as 117,
 * and we mapped between LINKTYPE_PFLOG and DLT_PFLOG.
 *
 * OpenBSD eventually switched to using 117 for DLT_PFLOG as well.
 *
 * Don't use 17 for anything else.
 */

/*
 * 18 is used for DLT_PFSYNC in OpenBSD, NetBSD, DragonFly BSD and
 * macOS; don't use it for anything else.  (FreeBSD uses 121, which
 * collides with DLT_HHDLC, even though it doesn't use 18 for
 * anything and doesn't appear to have ever used it for anything.)
 *
 * We define it as 18 on those platforms; it is, unfortunately, used
 * for DLT_CIP in Suse 6.3, so we don't define it as DLT_PFSYNC
 * in general.  As the packet format for it, like that for
 * DLT_PFLOG, is not only OS-dependent but OS-version-dependent,
 * we don't support printing it in tcpdump except on OSes that
 * have the relevant header files, so it's not that useful on
 * other platforms.
 */
#if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__DragonFly__) || defined(__APPLE__)
#define DLT_PFSYNC	18
#endif

#define DLT_ATM_CLIP	19	/* Linux Classical-IP over ATM */

/*
 * Apparently Redback uses this for its SmartEdge 400/800.  I hope
 * nobody else decided to use it, too.
 */
#define DLT_REDBACK_SMARTEDGE	32

/*
 * These values are defined by NetBSD; other platforms should refrain from
 * using them for other purposes, so that NetBSD savefiles with link
 * types of 50 or 51 can be read as this type on all platforms.
 */
#define DLT_PPP_SERIAL	50	/* PPP over serial with HDLC encapsulation */
#define DLT_PPP_ETHER	51	/* PPP over Ethernet */

/*
 * The Axent Raptor firewall - now the Symantec Enterprise Firewall - uses
 * a link-layer type of 99 for the tcpdump it supplies.  The link-layer
 * header has 6 bytes of unknown data, something that appears to be an
 * Ethernet type, and 36 bytes that appear to be 0 in at least one capture
 * I've seen.
 */
#define DLT_SYMANTEC_FIREWALL	99

/*
 * Values between 100 and 103 are used in capture file headers as
 * link-layer header type LINKTYPE_ values corresponding to DLT_ types
 * that differ between platforms; don't use those values for new DLT_
 * new types.
 */

/*
 * Values starting with 104 are used for newly-assigned link-layer
 * header type values; for those link-layer header types, the DLT_
 * value returned by pcap_datalink() and passed to pcap_open_dead(),
 * and the LINKTYPE_ value that appears in capture files, are the
 * same.
 *
 * DLT_MATCHING_MIN is the lowest such value; DLT_MATCHING_MAX is
 * the highest such value.
 */
#define DLT_MATCHING_MIN	104

/*
 * This value was defined by libpcap 0.5; platforms that have defined
 * it with a different value should define it here with that value -
 * a link type of 104 in a save file will be mapped to DLT_C_HDLC,
 * whatever value that happens to be, so programs will correctly
 * handle files with that link type regardless of the value of
 * DLT_C_HDLC.
 *
 * The name DLT_C_HDLC was used by BSD/OS; we use that name for source
 * compatibility with programs written for BSD/OS.
 *
 * libpcap 0.5 defined it as DLT_CHDLC; we define DLT_CHDLC as well,
 * for source compatibility with programs written for libpcap 0.5.
 */
#define DLT_C_HDLC	104	/* Cisco HDLC */
#define DLT_CHDLC	DLT_C_HDLC

#define DLT_IEEE802_11	105	/* IEEE 802.11 wireless */

/*
 * 106 is reserved for Linux Classical IP over ATM; it's like DLT_RAW,
 * except when it isn't.  (I.e., sometimes it's just raw IP, and
 * sometimes it isn't.)  We currently handle it as DLT_LINUX_SLL,
 * so that we don't have to worry about the link-layer header.)
 */

/*
 * Frame Relay; BSD/OS has a DLT_FR with a value of 11, but that collides
 * with other values.
 * DLT_FR and DLT_FRELAY packets start with the Q.922 Frame Relay header
 * (DLCI, etc.).
 */
#define DLT_FRELAY	107

/*
 * OpenBSD DLT_LOOP, for loopback devices; it's like DLT_NULL, except
 * that the AF_ type in the link-layer header is in network byte order.
 *
 * DLT_LOOP is 12 in OpenBSD, but that's DLT_RAW in other OSes, so
 * we don't use 12 for it in OSes other than OpenBSD.
 */
#ifdef __OpenBSD__
#define DLT_LOOP	12
#else
#define DLT_LOOP	108
#endif

/*
 * Encapsulated packets for IPsec; DLT_ENC is 13 in OpenBSD, but that's
 * DLT_SLIP_BSDOS in NetBSD, so we don't use 13 for it in OSes other
 * than OpenBSD.
 */
#ifdef __OpenBSD__
#define DLT_ENC		13
#else
#define DLT_ENC		109
#endif

/*
 * Values between 110 and 112 are reserved for use in capture file headers
 * as link-layer types corresponding to DLT_ types that might differ
 * between platforms; don't use those values for new DLT_ types
 * other than the corresponding DLT_ types.
 */

/*
 * Linux cooked sockets.
 */
#define DLT_LINUX_SLL	113

/*
 * Apple LocalTalk hardware.
 */
#define DLT_LTALK	114

/*
 * Acorn Econet.
 */
#define DLT_ECONET	115

/*
 * Reserved for use with OpenBSD ipfilter.
 */
#define DLT_IPFILTER	116

/*
 * OpenBSD DLT_PFLOG.
 */
#define DLT_PFLOG	117

/*
 * Registered for Cisco-internal use.
 */
#define DLT_CISCO_IOS	118

/*
 * For 802.11 cards using the Prism II chips, with a link-layer
 * header including Prism monitor mode information plus an 802.11
 * header.
 */
#define DLT_PRISM_HEADER	119

/*
 * Reserved for Aironet 802.11 cards, with an Aironet link-layer header
 * (see Doug Ambrisko's FreeBSD patches).
 */
#define DLT_AIRONET_HEADER	120

/*
 * Sigh.
 *
 * 121 was reserved for Siemens HiPath HDLC on 2002-01-25, as
 * requested by Tomas Kukosa.
 *
 * On 2004-02-25, a FreeBSD checkin to sys/net/bpf.h was made that
 * assigned 121 as DLT_PFSYNC.  In current versions, its libpcap
 * does DLT_ <-> LINKTYPE_ mapping, mapping DLT_PFSYNC to a
 * LINKTYPE_PFSYNC value of 246, so it should write out DLT_PFSYNC
 * dump files with 246 as the link-layer header type.  (Earlier
 * versions might not have done mapping, in which case they would
 * have written them out with a link-layer header type of 121.)
 *
 * OpenBSD, from which pf came, however, uses 18 for DLT_PFSYNC;
 * its libpcap does no DLT_ <-> LINKTYPE_ mapping, so it would
 * write out DLT_PFSYNC dump files with use 18 as the link-layer
 * header type.
 *
 * NetBSD, DragonFly BSD, and Darwin also use 18 for DLT_PFSYNC; in
 * current versions, their libpcaps do DLT_ <-> LINKTYPE_ mapping,
 * mapping DLT_PFSYNC to a LINKTYPE_PFSYNC value of 246, so they
 * should write out DLT_PFSYNC dump files with 246 as the link-layer
 * header type.  (Earlier versions might not have done mapping,
 * in which case they'd work the same way OpenBSD does, writing
 * them out with a link-layer header type of 18.)
 *
 * We'll define DLT_PFSYNC as:
 *
 *    18 on NetBSD, OpenBSD, DragonFly BSD, and Darwin;
 *
 *    121 on FreeBSD;
 *
 *    246 everywhere else.
 *
 * We'll define DLT_HHDLC as 121 on everything except for FreeBSD;
 * anybody who wants to compile, on FreeBSD, code that uses DLT_HHDLC
 * is out of luck.
 *
 * We'll define LINKTYPE_PFSYNC as 246 on *all* platforms, so that
 * savefiles written using *this* code won't use 18 or 121 for PFSYNC,
 * they'll all use 246.
 *
 * Code that uses pcap_datalink() to determine the link-layer header
 * type of a savefile won't, when built and run on FreeBSD, be able
 * to distinguish between LINKTYPE_PFSYNC and LINKTYPE_HHDLC capture
 * files, as pcap_datalink() will give 121 for both of them.  Code
 * that doesn't, such as the code in Wireshark, will be able to
 * distinguish between them.
 *
 * FreeBSD's libpcap won't map a link-layer header type of 18 - i.e.,
 * DLT_PFSYNC files from OpenBSD and possibly older versions of NetBSD,
 * DragonFly BSD, and macOS - to DLT_PFSYNC, so code built with FreeBSD's
 * libpcap won't treat those files as DLT_PFSYNC files.
 *
 * Other libpcaps won't map a link-layer header type of 121 to DLT_PFSYNC;
 * this means they can read DLT_HHDLC files, if any exist, but won't
 * treat pcap files written by any older versions of FreeBSD libpcap that
 * didn't map to 246 as DLT_PFSYNC files.
 */
#ifdef __FreeBSD__
#define DLT_PFSYNC		121
#else
#define DLT_HHDLC		121
#endif

/*
 * This is for RFC 2625 IP-over-Fibre Channel.
 *
 * This is not for use with raw Fibre Channel, where the link-layer
 * header starts with a Fibre Channel frame header; it's for IP-over-FC,
 * where the link-layer header starts with an RFC 2625 Network_Header
 * field.
 */
#define DLT_IP_OVER_FC		122

/*
 * This is for Full Frontal ATM on Solaris with SunATM, with a
 * pseudo-header followed by an AALn PDU.
 *
 * There may be other forms of Full Frontal ATM on other OSes,
 * with different pseudo-headers.
 *
 * If ATM software returns a pseudo-header with VPI/VCI information
 * (and, ideally, packet type information, e.g. signalling, ILMI,
 * LANE, LLC-multiplexed traffic, etc.), it should not use
 * DLT_ATM_RFC1483, but should get a new DLT_ value, so tcpdump
 * and the like don't have to infer the presence or absence of a
 * pseudo-header and the form of the pseudo-header.
 */
#define DLT_SUNATM		123	/* Solaris+SunATM */

/*
 * Reserved as per request from Kent Dahlgren <kent@praesum.com>
 * for private use.
 */
#define DLT_RIO                 124     /* RapidIO */
#define DLT_PCI_EXP             125     /* PCI Express */
#define DLT_AURORA              126     /* Xilinx Aurora link layer */

/*
 * Header for 802.11 plus a number of bits of link-layer information
 * including radio information, used by some recent BSD drivers as
 * well as the madwifi Atheros driver for Linux.
 */
#define DLT_IEEE802_11_RADIO	127	/* 802.11 plus radiotap radio header */

/*
 * Reserved for the TZSP encapsulation, as per request from
 * Chris Waters <chris.waters@networkchemistry.com>
 * TZSP is a generic encapsulation for any other link type,
 * which includes a means to include meta-information
 * with the packet, e.g. signal strength and channel
 * for 802.11 packets.
 */
#define DLT_TZSP                128     /* Tazmen Sniffer Protocol */

/*
 * BSD's ARCNET headers have the source host, destination host,
 * and type at the beginning of the packet; that's what's handed
 * up to userland via BPF.
 *
 * Linux's ARCNET headers, however, have a 2-byte offset field
 * between the host IDs and the type; that's what's handed up
 * to userland via PF_PACKET sockets.
 *
 * We therefore have to have separate DLT_ values for them.
 */
#define DLT_ARCNET_LINUX	129	/* ARCNET */

/*
 * Juniper-private data link types, as per request from
 * Hannes Gredler <hannes@juniper.net>.  The DLT_s are used
 * for passing on chassis-internal metainformation such as
 * QOS profiles, etc..
 */
#define DLT_JUNIPER_MLPPP       130
#define DLT_JUNIPER_MLFR        131
#define DLT_JUNIPER_ES          132
#define DLT_JUNIPER_GGSN        133
#define DLT_JUNIPER_MFR         134
#define DLT_JUNIPER_ATM2        135
#define DLT_JUNIPER_SERVICES    136
#define DLT_JUNIPER_ATM1        137

/*
 * Apple IP-over-IEEE 1394, as per a request from Dieter Siegmund
 * <dieter@apple.com>.  The header that's presented is an Ethernet-like
 * header:
 *
 *	#define FIREWIRE_EUI64_LEN	8
 *	struct firewire_header {
 *		u_char  firewire_dhost[FIREWIRE_EUI64_LEN];
 *		u_char  firewire_shost[FIREWIRE_EUI64_LEN];
 *		u_short firewire_type;
 *	};
 *
 * with "firewire_type" being an Ethernet type value, rather than,
 * for example, raw GASP frames being handed up.
 */
#define DLT_APPLE_IP_OVER_IEEE1394	138

/*
 * Various SS7 encapsulations, as per a request from Jeff Morriss
 * <jeff.morriss[AT]ulticom.com> and subsequent discussions.
 */
#define DLT_MTP2_WITH_PHDR	139	/* pseudo-header with various info, followed by MTP2 */
#define DLT_MTP2		140	/* MTP2, without pseudo-header */
#define DLT_MTP3		141	/* MTP3, without pseudo-header or MTP2 */
#define DLT_SCCP		142	/* SCCP, without pseudo-header or MTP2 or MTP3 */

/*
 * DOCSIS MAC frames.
 */
#define DLT_DOCSIS		143

/*
 * Linux-IrDA packets. Protocol defined at http://www.irda.org.
 * Those packets include IrLAP headers and above (IrLMP...), but
 * don't include Phy framing (SOF/EOF/CRC & byte stuffing), because Phy
 * framing can be handled by the hardware and depend on the bitrate.
 * This is exactly the format you would get capturing on a Linux-IrDA
 * interface (irdaX), but not on a raw serial port.
 * Note the capture is done in "Linux-cooked" mode, so each packet include
 * a fake packet header (struct sll_header). This is because IrDA packet
 * decoding is dependant on the direction of the packet (incomming or
 * outgoing).
 * When/if other platform implement IrDA capture, we may revisit the
 * issue and define a real DLT_IRDA...
 * Jean II
 */
#define DLT_LINUX_IRDA		144

/*
 * Reserved for IBM SP switch and IBM Next Federation switch.
 */
#define DLT_IBM_SP		145
#define DLT_IBM_SN		146

/*
 * Reserved for private use.  If you have some link-layer header type
 * that you want to use within your organization, with the capture files
 * using that link-layer header type not ever be sent outside your
 * organization, you can use these values.
 *
 * No libpcap release will use these for any purpose, nor will any
 * tcpdump release use them, either.
 *
 * Do *NOT* use these in capture files that you expect anybody not using
 * your private versions of capture-file-reading tools to read; in
 * particular, do *NOT* use them in products, otherwise you may find that
 * people won't be able to use tcpdump, or snort, or Ethereal, or... to
 * read capture files from your firewall/intrusion detection/traffic
 * monitoring/etc. appliance, or whatever product uses that DLT_ value,
 * and you may also find that the developers of those applications will
 * not accept patches to let them read those files.
 *
 * Also, do not use them if somebody might send you a capture using them
 * for *their* private type and tools using them for *your* private type
 * would have to read them.
 *
 * Instead, ask "tcpdump-workers@lists.tcpdump.org" for a new DLT_ value,
 * as per the comment above, and use the type you're given.
 */
#define DLT_USER0		147
#define DLT_USER1		148
#define DLT_USER2		149
#define DLT_USER3		150
#define DLT_USER4		151
#define DLT_USER5		152
#define DLT_USER6		153
#define DLT_USER7		154
#define DLT_USER8		155
#define DLT_USER9		156
#define DLT_USER10		157
#define DLT_USER11		158
#define DLT_USER12		159
#define DLT_USER13		160
#define DLT_USER14		161
#define DLT_USER15		162

/*
 * For future use with 802.11 captures - defined by AbsoluteValue
 * Systems to store a number of bits of link-layer information
 * including radio information:
 *
 *	http://www.shaftnet.org/~pizza/software/capturefrm.txt
 *
 * but it might be used by some non-AVS drivers now or in the
 * future.
 */
#define DLT_IEEE802_11_RADIO_AVS 163	/* 802.11 plus AVS radio header */

/*
 * Juniper-private data link type, as per request from
 * Hannes Gredler <hannes@juniper.net>.  The DLT_s are used
 * for passing on chassis-internal metainformation such as
 * QOS profiles, etc..
 */
#define DLT_JUNIPER_MONITOR     164

/*
 * BACnet MS/TP frames.
 */
#define DLT_BACNET_MS_TP	165

/*
 * Another PPP variant as per request from Karsten Keil <kkeil@suse.de>.
 *
 * This is used in some OSes to allow a kernel socket filter to distinguish
 * between incoming and outgoing packets, on a socket intended to
 * supply pppd with outgoing packets so it can do dial-on-demand and
 * hangup-on-lack-of-demand; incoming packets are filtered out so they
 * don't cause pppd to hold the connection up (you don't want random
 * input packets such as port scans, packets from old lost connections,
 * etc. to force the connection to stay up).
 *
 * The first byte of the PPP header (0xff03) is modified to accomodate
 * the direction - 0x00 = IN, 0x01 = OUT.
 */
#define DLT_PPP_PPPD		166

/*
 * Names for backwards compatibility with older versions of some PPP
 * software; new software should use DLT_PPP_PPPD.
 */
#define DLT_PPP_WITH_DIRECTION	DLT_PPP_PPPD
#define DLT_LINUX_PPP_WITHDIRECTION	DLT_PPP_PPPD

/*
 * Juniper-private data link type, as per request from
 * Hannes Gredler <hannes@juniper.net>.  The DLT_s are used
 * for passing on chassis-internal metainformation such as
 * QOS profiles, cookies, etc..
 */
#define DLT_JUNIPER_PPPOE       167
#define DLT_JUNIPER_PPPOE_ATM   168

#define DLT_GPRS_LLC		169	/* GPRS LLC */
#define DLT_GPF_T		170	/* GPF-T (ITU-T G.7041/Y.1303) */
#define DLT_GPF_F		171	/* GPF-F (ITU-T G.7041/Y.1303) */

/*
 * Requested by Oolan Zimmer <oz@gcom.com> for use in Gcom's T1/E1 line
 * monitoring equipment.
 */
#define DLT_GCOM_T1E1		172
#define DLT_GCOM_SERIAL		173

/*
 * Juniper-private data link type, as per request from
 * Hannes Gredler <hannes@juniper.net>.  The DLT_ is used
 * for internal communication to Physical Interface Cards (PIC)
 */
#define DLT_JUNIPER_PIC_PEER    174

/*
 * Link types requested by Gregor Maier <gregor@endace.com> of Endace
 * Measurement Systems.  They add an ERF header (see
 * http://www.endace.com/support/EndaceRecordFormat.pdf) in front of
 * the link-layer header.
 */
#define DLT_ERF_ETH		175	/* Ethernet */
#define DLT_ERF_POS		176	/* Packet-over-SONET */

/*
 * Requested by Daniele Orlandi <daniele@orlandi.com> for raw LAPD
 * for vISDN (http://www.orlandi.com/visdn/).  Its link-layer header
 * includes additional information before the LAPD header, so it's
 * not necessarily a generic LAPD header.
 */
#define DLT_LINUX_LAPD		177

/*
 * Juniper-private data link type, as per request from
 * Hannes Gredler <hannes@juniper.net>.
 * The DLT_ are used for prepending meta-information
 * like interface index, interface name
 * before standard Ethernet, PPP, Frelay & C-HDLC Frames
 */
#define DLT_JUNIPER_ETHER       178
#define DLT_JUNIPER_PPP         179
#define DLT_JUNIPER_FRELAY      180
#define DLT_JUNIPER_CHDLC       181

/*
 * Multi Link Frame Relay (FRF.16)
 */
#define DLT_MFR                 182

/*
 * Juniper-private data link type, as per request from
 * Hannes Gredler <hannes@juniper.net>.
 * The DLT_ is used for internal communication with a
 * voice Adapter Card (PIC)
 */
#define DLT_JUNIPER_VP          183

/*
 * Arinc 429 frames.
 * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>.
 * Every frame contains a 32bit A429 label.
 * More documentation on Arinc 429 can be found at
 * http://www.condoreng.com/support/downloads/tutorials/ARINCTutorial.pdf
 */
#define DLT_A429                184

/*
 * Arinc 653 Interpartition Communication messages.
 * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>.
 * Please refer to the A653-1 standard for more information.
 */
#define DLT_A653_ICM            185

/*
 * This used to be "USB packets, beginning with a USB setup header;
 * requested by Paolo Abeni <paolo.abeni@email.it>."
 *
 * However, that header didn't work all that well - it left out some
 * useful information - and was abandoned in favor of the DLT_USB_LINUX
 * header.
 *
 * This is now used by FreeBSD for its BPF taps for USB; that has its
 * own headers.  So it is written, so it is done.
 *
 * For source-code compatibility, we also define DLT_USB to have this
 * value.  We do it numerically so that, if code that includes this
 * file (directly or indirectly) also includes an OS header that also
 * defines DLT_USB as 186, we don't get a redefinition warning.
 * (NetBSD 7 does that.)
 */
#define DLT_USB_FREEBSD		186
#define DLT_USB			186

/*
 * Bluetooth HCI UART transport layer (part H:4); requested by
 * Paolo Abeni.
 */
#define DLT_BLUETOOTH_HCI_H4	187

/*
 * IEEE 802.16 MAC Common Part Sublayer; requested by Maria Cruz
 * <cruz_petagay@bah.com>.
 */
#define DLT_IEEE802_16_MAC_CPS	188

/*
 * USB packets, beginning with a Linux USB header; requested by
 * Paolo Abeni <paolo.abeni@email.it>.
 */
#define DLT_USB_LINUX		189

/*
 * Controller Area Network (CAN) v. 2.0B packets.
 * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>.
 * Used to dump CAN packets coming from a CAN Vector board.
 * More documentation on the CAN v2.0B frames can be found at
 * http://www.can-cia.org/downloads/?269
 */
#define DLT_CAN20B              190

/*
 * IEEE 802.15.4, with address fields padded, as is done by Linux
 * drivers; requested by Juergen Schimmer.
 */
#define DLT_IEEE802_15_4_LINUX	191

/*
 * Per Packet Information encapsulated packets.
 * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>.
 */
#define DLT_PPI			192

/*
 * Header for 802.16 MAC Common Part Sublayer plus a radiotap radio header;
 * requested by Charles Clancy.
 */
#define DLT_IEEE802_16_MAC_CPS_RADIO	193

/*
 * Juniper-private data link type, as per request from
 * Hannes Gredler <hannes@juniper.net>.
 * The DLT_ is used for internal communication with a
 * integrated service module (ISM).
 */
#define DLT_JUNIPER_ISM         194

/*
 * IEEE 802.15.4, exactly as it appears in the spec (no padding, no
 * nothing); requested by Mikko Saarnivala <mikko.saarnivala@sensinode.com>.
 * For this one, we expect the FCS to be present at the end of the frame;
 * if the frame has no FCS, DLT_IEEE802_15_4_NOFCS should be used.
 *
 * We keep the name DLT_IEEE802_15_4 as an alias for backwards
 * compatibility, but, again, this should *only* be used for 802.15.4
 * frames that include the FCS.
 */
#define DLT_IEEE802_15_4_WITHFCS	195
#define DLT_IEEE802_15_4		DLT_IEEE802_15_4_WITHFCS

/*
 * Various link-layer types, with a pseudo-header, for SITA
 * (http://www.sita.aero/); requested by Fulko Hew (fulko.hew@gmail.com).
 */
#define DLT_SITA		196

/*
 * Various link-layer types, with a pseudo-header, for Endace DAG cards;
 * encapsulates Endace ERF records.  Requested by Stephen Donnelly
 * <stephen@endace.com>.
 */
#define DLT_ERF			197

/*
 * Special header prepended to Ethernet packets when capturing from a
 * u10 Networks board.  Requested by Phil Mulholland
 * <phil@u10networks.com>.
 */
#define DLT_RAIF1		198

/*
 * IPMB packet for IPMI, beginning with a 2-byte header, followed by
 * the I2C slave address, followed by the netFn and LUN, etc..
 * Requested by Chanthy Toeung <chanthy.toeung@ca.kontron.com>.
 *
 * XXX - this used to be called DLT_IPMB, back when we got the
 * impression from the email thread requesting it that the packet
 * had no extra 2-byte header.  We've renamed it; if anybody used
 * DLT_IPMB and assumed no 2-byte header, this will cause the compile
 * to fail, at which point we'll have to figure out what to do about
 * the two header types using the same DLT_/LINKTYPE_ value.  If that
 * doesn't happen, we'll assume nobody used it and that the redefinition
 * is safe.
 */
#define DLT_IPMB_KONTRON	199

/*
 * Juniper-private data link type, as per request from
 * Hannes Gredler <hannes@juniper.net>.
 * The DLT_ is used for capturing data on a secure tunnel interface.
 */
#define DLT_JUNIPER_ST          200

/*
 * Bluetooth HCI UART transport layer (part H:4), with pseudo-header
 * that includes direction information; requested by Paolo Abeni.
 */
#define DLT_BLUETOOTH_HCI_H4_WITH_PHDR	201

/*
 * AX.25 packet with a 1-byte KISS header; see
 *
 *	http://www.ax25.net/kiss.htm
 *
 * as per Richard Stearn <richard@rns-stearn.demon.co.uk>.
 */
#define DLT_AX25_KISS		202

/*
 * LAPD packets from an ISDN channel, starting with the address field,
 * with no pseudo-header.
 * Requested by Varuna De Silva <varunax@gmail.com>.
 */
#define DLT_LAPD		203

/*
 * PPP, with a one-byte direction pseudo-header prepended - zero means
 * "received by this host", non-zero (any non-zero value) means "sent by
 * this host" - as per Will Barker <w.barker@zen.co.uk>.
 */
#define DLT_PPP_WITH_DIR	204	/* Don't confuse with DLT_PPP_WITH_DIRECTION */

/*
 * Cisco HDLC, with a one-byte direction pseudo-header prepended - zero
 * means "received by this host", non-zero (any non-zero value) means
 * "sent by this host" - as per Will Barker <w.barker@zen.co.uk>.
 */
#define DLT_C_HDLC_WITH_DIR	205

/*
 * Frame Relay, with a one-byte direction pseudo-header prepended - zero
 * means "received by this host" (DCE -> DTE), non-zero (any non-zero
 * value) means "sent by this host" (DTE -> DCE) - as per Will Barker
 * <w.barker@zen.co.uk>.
 */
#define DLT_FRELAY_WITH_DIR	206

/*
 * LAPB, with a one-byte direction pseudo-header prepended - zero means
 * "received by this host" (DCE -> DTE), non-zero (any non-zero value)
 * means "sent by this host" (DTE -> DCE)- as per Will Barker
 * <w.barker@zen.co.uk>.
 */
#define DLT_LAPB_WITH_DIR	207

/*
 * 208 is reserved for an as-yet-unspecified proprietary link-layer
 * type, as requested by Will Barker.
 */

/*
 * IPMB with a Linux-specific pseudo-header; as requested by Alexey Neyman
 * <avn@pigeonpoint.com>.
 */
#define DLT_IPMB_LINUX		209

/*
 * FlexRay automotive bus - http://www.flexray.com/ - as requested
 * by Hannes Kaelber <hannes.kaelber@x2e.de>.
 */
#define DLT_FLEXRAY		210

/*
 * Media Oriented Systems Transport (MOST) bus for multimedia
 * transport - http://www.mostcooperation.com/ - as requested
 * by Hannes Kaelber <hannes.kaelber@x2e.de>.
 */
#define DLT_MOST		211

/*
 * Local Interconnect Network (LIN) bus for vehicle networks -
 * http://www.lin-subbus.org/ - as requested by Hannes Kaelber
 * <hannes.kaelber@x2e.de>.
 */
#define DLT_LIN			212

/*
 * X2E-private data link type used for serial line capture,
 * as requested by Hannes Kaelber <hannes.kaelber@x2e.de>.
 */
#define DLT_X2E_SERIAL		213

/*
 * X2E-private data link type used for the Xoraya data logger
 * family, as requested by Hannes Kaelber <hannes.kaelber@x2e.de>.
 */
#define DLT_X2E_XORAYA		214

/*
 * IEEE 802.15.4, exactly as it appears in the spec (no padding, no
 * nothing), but with the PHY-level data for non-ASK PHYs (4 octets
 * of 0 as preamble, one octet of SFD, one octet of frame length+
 * reserved bit, and then the MAC-layer data, starting with the
 * frame control field).
 *
 * Requested by Max Filippov <jcmvbkbc@gmail.com>.
 */
#define DLT_IEEE802_15_4_NONASK_PHY	215

/*
 * David Gibson <david@gibson.dropbear.id.au> requested this for
 * captures from the Linux kernel /dev/input/eventN devices. This
 * is used to communicate keystrokes and mouse movements from the
 * Linux kernel to display systems, such as Xorg.
 */
#define DLT_LINUX_EVDEV		216

/*
 * GSM Um and Abis interfaces, preceded by a "gsmtap" header.
 *
 * Requested by Harald Welte <laforge@gnumonks.org>.
 */
#define DLT_GSMTAP_UM		217
#define DLT_GSMTAP_ABIS		218

/*
 * MPLS, with an MPLS label as the link-layer header.
 * Requested by Michele Marchetto <michele@openbsd.org> on behalf
 * of OpenBSD.
 */
#define DLT_MPLS		219

/*
 * USB packets, beginning with a Linux USB header, with the USB header
 * padded to 64 bytes; required for memory-mapped access.
 */
#define DLT_USB_LINUX_MMAPPED	220

/*
 * DECT packets, with a pseudo-header; requested by
 * Matthias Wenzel <tcpdump@mazzoo.de>.
 */
#define DLT_DECT		221

/*
 * From: "Lidwa, Eric (GSFC-582.0)[SGT INC]" <eric.lidwa-1@nasa.gov>
 * Date: Mon, 11 May 2009 11:18:30 -0500
 *
 * DLT_AOS. We need it for AOS Space Data Link Protocol.
 *   I have already written dissectors for but need an OK from
 *   legal before I can submit a patch.
 *
 */
#define DLT_AOS                 222

/*
 * Wireless HART (Highway Addressable Remote Transducer)
 * From the HART Communication Foundation
 * IES/PAS 62591
 *
 * Requested by Sam Roberts <vieuxtech@gmail.com>.
 */
#define DLT_WIHART		223

/*
 * Fibre Channel FC-2 frames, beginning with a Frame_Header.
 * Requested by Kahou Lei <kahou82@gmail.com>.
 */
#define DLT_FC_2		224

/*
 * Fibre Channel FC-2 frames, beginning with an encoding of the
 * SOF, and ending with an encoding of the EOF.
 *
 * The encodings represent the frame delimiters as 4-byte sequences
 * representing the corresponding ordered sets, with K28.5
 * represented as 0xBC, and the D symbols as the corresponding
 * byte values; for example, SOFi2, which is K28.5 - D21.5 - D1.2 - D21.2,
 * is represented as 0xBC 0xB5 0x55 0x55.
 *
 * Requested by Kahou Lei <kahou82@gmail.com>.
 */
#define DLT_FC_2_WITH_FRAME_DELIMS	225

/*
 * Solaris ipnet pseudo-header; requested by Darren Reed <Darren.Reed@Sun.COM>.
 *
 * The pseudo-header starts with a one-byte version number; for version 2,
 * the pseudo-header is:
 *
 * struct dl_ipnetinfo {
 *     uint8_t   dli_version;
 *     uint8_t   dli_family;
 *     uint16_t  dli_htype;
 *     uint32_t  dli_pktlen;
 *     uint32_t  dli_ifindex;
 *     uint32_t  dli_grifindex;
 *     uint32_t  dli_zsrc;
 *     uint32_t  dli_zdst;
 * };
 *
 * dli_version is 2 for the current version of the pseudo-header.
 *
 * dli_family is a Solaris address family value, so it's 2 for IPv4
 * and 26 for IPv6.
 *
 * dli_htype is a "hook type" - 0 for incoming packets, 1 for outgoing
 * packets, and 2 for packets arriving from another zone on the same
 * machine.
 *
 * dli_pktlen is the length of the packet data following the pseudo-header
 * (so the captured length minus dli_pktlen is the length of the
 * pseudo-header, assuming the entire pseudo-header was captured).
 *
 * dli_ifindex is the interface index of the interface on which the
 * packet arrived.
 *
 * dli_grifindex is the group interface index number (for IPMP interfaces).
 *
 * dli_zsrc is the zone identifier for the source of the packet.
 *
 * dli_zdst is the zone identifier for the destination of the packet.
 *
 * A zone number of 0 is the global zone; a zone number of 0xffffffff
 * means that the packet arrived from another host on the network, not
 * from another zone on the same machine.
 *
 * An IPv4 or IPv6 datagram follows the pseudo-header; dli_family indicates
 * which of those it is.
 */
#define DLT_IPNET		226

/*
 * CAN (Controller Area Network) frames, with a pseudo-header as supplied
 * by Linux SocketCAN, and with multi-byte numerical fields in that header
 * in big-endian byte order.
 *
 * See Documentation/networking/can.txt in the Linux source.
 *
 * Requested by Felix Obenhuber <felix@obenhuber.de>.
 */
#define DLT_CAN_SOCKETCAN	227

/*
 * Raw IPv4/IPv6; different from DLT_RAW in that the DLT_ value specifies
 * whether it's v4 or v6.  Requested by Darren Reed <Darren.Reed@Sun.COM>.
 */
#define DLT_IPV4		228
#define DLT_IPV6		229

/*
 * IEEE 802.15.4, exactly as it appears in the spec (no padding, no
 * nothing), and with no FCS at the end of the frame; requested by
 * Jon Smirl <jonsmirl@gmail.com>.
 */
#define DLT_IEEE802_15_4_NOFCS	230

/*
 * Raw D-Bus:
 *
 *	http://www.freedesktop.org/wiki/Software/dbus
 *
 * messages:
 *
 *	http://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-messages
 *
 * starting with the endianness flag, followed by the message type, etc.,
 * but without the authentication handshake before the message sequence:
 *
 *	http://dbus.freedesktop.org/doc/dbus-specification.html#auth-protocol
 *
 * Requested by Martin Vidner <martin@vidner.net>.
 */
#define DLT_DBUS		231

/*
 * Juniper-private data link type, as per request from
 * Hannes Gredler <hannes@juniper.net>.
 */
#define DLT_JUNIPER_VS			232
#define DLT_JUNIPER_SRX_E2E		233
#define DLT_JUNIPER_FIBRECHANNEL	234

/*
 * DVB-CI (DVB Common Interface for communication between a PC Card
 * module and a DVB receiver).  See
 *
 *	http://www.kaiser.cx/pcap-dvbci.html
 *
 * for the specification.
 *
 * Requested by Martin Kaiser <martin@kaiser.cx>.
 */
#define DLT_DVB_CI		235

/*
 * Variant of 3GPP TS 27.010 multiplexing protocol (similar to, but
 * *not* the same as, 27.010).  Requested by Hans-Christoph Schemmel
 * <hans-christoph.schemmel@cinterion.com>.
 */
#define DLT_MUX27010		236

/*
 * STANAG 5066 D_PDUs.  Requested by M. Baris Demiray
 * <barisdemiray@gmail.com>.
 */
#define DLT_STANAG_5066_D_PDU	237

/*
 * Juniper-private data link type, as per request from
 * Hannes Gredler <hannes@juniper.net>.
 */
#define DLT_JUNIPER_ATM_CEMIC	238

/*
 * NetFilter LOG messages
 * (payload of netlink NFNL_SUBSYS_ULOG/NFULNL_MSG_PACKET packets)
 *
 * Requested by Jakub Zawadzki <darkjames-ws@darkjames.pl>
 */
#define DLT_NFLOG		239

/*
 * Hilscher Gesellschaft fuer Systemautomation mbH link-layer type
 * for Ethernet packets with a 4-byte pseudo-header and always
 * with the payload including the FCS, as supplied by their
 * netANALYZER hardware and software.
 *
 * Requested by Holger P. Frommer <HPfrommer@hilscher.com>
 */
#define DLT_NETANALYZER		240

/*
 * Hilscher Gesellschaft fuer Systemautomation mbH link-layer type
 * for Ethernet packets with a 4-byte pseudo-header and FCS and
 * with the Ethernet header preceded by 7 bytes of preamble and
 * 1 byte of SFD, as supplied by their netANALYZER hardware and
 * software.
 *
 * Requested by Holger P. Frommer <HPfrommer@hilscher.com>
 */
#define DLT_NETANALYZER_TRANSPARENT	241

/*
 * IP-over-InfiniBand, as specified by RFC 4391.
 *
 * Requested by Petr Sumbera <petr.sumbera@oracle.com>.
 */
#define DLT_IPOIB		242

/*
 * MPEG-2 transport stream (ISO 13818-1/ITU-T H.222.0).
 *
 * Requested by Guy Martin <gmsoft@tuxicoman.be>.
 */
#define DLT_MPEG_2_TS		243

/*
 * ng4T GmbH's UMTS Iub/Iur-over-ATM and Iub/Iur-over-IP format as
 * used by their ng40 protocol tester.
 *
 * Requested by Jens Grimmer <jens.grimmer@ng4t.com>.
 */
#define DLT_NG40		244

/*
 * Pseudo-header giving adapter number and flags, followed by an NFC
 * (Near-Field Communications) Logical Link Control Protocol (LLCP) PDU,
 * as specified by NFC Forum Logical Link Control Protocol Technical
 * Specification LLCP 1.1.
 *
 * Requested by Mike Wakerly <mikey@google.com>.
 */
#define DLT_NFC_LLCP		245

/*
 * 246 is used as LINKTYPE_PFSYNC; do not use it for any other purpose.
 *
 * DLT_PFSYNC has different values on different platforms, and all of
 * them collide with something used elsewhere.  On platforms that
 * don't already define it, define it as 246.
 */
#if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__) && !defined(__DragonFly__) && !defined(__APPLE__)
#define DLT_PFSYNC		246
#endif

/*
 * Raw InfiniBand packets, starting with the Local Routing Header.
 *
 * Requested by Oren Kladnitsky <orenk@mellanox.com>.
 */
#define DLT_INFINIBAND		247

/*
 * SCTP, with no lower-level protocols (i.e., no IPv4 or IPv6).
 *
 * Requested by Michael Tuexen <Michael.Tuexen@lurchi.franken.de>.
 */
#define DLT_SCTP		248

/*
 * USB packets, beginning with a USBPcap header.
 *
 * Requested by Tomasz Mon <desowin@gmail.com>
 */
#define DLT_USBPCAP		249

/*
 * Schweitzer Engineering Laboratories "RTAC" product serial-line
 * packets.
 *
 * Requested by Chris Bontje <chris_bontje@selinc.com>.
 */
#define DLT_RTAC_SERIAL		250

/*
 * Bluetooth Low Energy air interface link-layer packets.
 *
 * Requested by Mike Kershaw <dragorn@kismetwireless.net>.
 */
#define DLT_BLUETOOTH_LE_LL	251

/*
 * DLT type for upper-protocol layer PDU saves from wireshark.
 *
 * the actual contents are determined by two TAGs stored with each
 * packet:
 *   EXP_PDU_TAG_LINKTYPE          the link type (LINKTYPE_ value) of the
 *				   original packet.
 *
 *   EXP_PDU_TAG_PROTO_NAME        the name of the wireshark dissector
 * 				   that can make sense of the data stored.
 */
#define DLT_WIRESHARK_UPPER_PDU	252

/*
 * DLT type for the netlink protocol (nlmon devices).
 */
#define DLT_NETLINK		253

/*
 * Bluetooth Linux Monitor headers for the BlueZ stack.
 */
#define DLT_BLUETOOTH_LINUX_MONITOR	254

/*
 * Bluetooth Basic Rate/Enhanced Data Rate baseband packets, as
 * captured by Ubertooth.
 */
#define DLT_BLUETOOTH_BREDR_BB	255

/*
 * Bluetooth Low Energy link layer packets, as captured by Ubertooth.
 */
#define DLT_BLUETOOTH_LE_LL_WITH_PHDR	256

/*
 * PROFIBUS data link layer.
 */
#define DLT_PROFIBUS_DL		257

/*
 * Apple's DLT_PKTAP headers.
 *
 * Sadly, the folks at Apple either had no clue that the DLT_USERn values
 * are for internal use within an organization and partners only, and
 * didn't know that the right way to get a link-layer header type is to
 * ask tcpdump.org for one, or knew and didn't care, so they just
 * used DLT_USER2, which causes problems for everything except for
 * their version of tcpdump.
 *
 * So I'll just give them one; hopefully this will show up in a
 * libpcap release in time for them to get this into 10.10 Big Sur
 * or whatever Mavericks' successor is called.  LINKTYPE_PKTAP
 * will be 258 *even on macOS*; that is *intentional*, so that
 * PKTAP files look the same on *all* OSes (different OSes can have
 * different numerical values for a given DLT_, but *MUST NOT* have
 * different values for what goes in a file, as files can be moved
 * between OSes!).
 *
 * When capturing, on a system with a Darwin-based OS, on a device
 * that returns 149 (DLT_USER2 and Apple's DLT_PKTAP) with this
 * version of libpcap, the DLT_ value for the pcap_t  will be DLT_PKTAP,
 * and that will continue to be DLT_USER2 on Darwin-based OSes. That way,
 * binary compatibility with Mavericks is preserved for programs using
 * this version of libpcap.  This does mean that if you were using
 * DLT_USER2 for some capture device on macOS, you can't do so with
 * this version of libpcap, just as you can't with Apple's libpcap -
 * on macOS, they define DLT_PKTAP to be DLT_USER2, so programs won't
 * be able to distinguish between PKTAP and whatever you were using
 * DLT_USER2 for.
 *
 * If the program saves the capture to a file using this version of
 * libpcap's pcap_dump code, the LINKTYPE_ value in the file will be
 * LINKTYPE_PKTAP, which will be 258, even on Darwin-based OSes.
 * That way, the file will *not* be a DLT_USER2 file.  That means
 * that the latest version of tcpdump, when built with this version
 * of libpcap, and sufficiently recent versions of Wireshark will
 * be able to read those files and interpret them correctly; however,
 * Apple's version of tcpdump in OS X 10.9 won't be able to handle
 * them.  (Hopefully, Apple will pick up this version of libpcap,
 * and the corresponding version of tcpdump, so that tcpdump will
 * be able to handle the old LINKTYPE_USER2 captures *and* the new
 * LINKTYPE_PKTAP captures.)
 */
#ifdef __APPLE__
#define DLT_PKTAP	DLT_USER2
#else
#define DLT_PKTAP	258
#endif

/*
 * Ethernet packets preceded by a header giving the last 6 octets
 * of the preamble specified by 802.3-2012 Clause 65, section
 * 65.1.3.2 "Transmit".
 */
#define DLT_EPON	259

/*
 * IPMI trace packets, as specified by Table 3-20 "Trace Data Block Format"
 * in the PICMG HPM.2 specification.
 */
#define DLT_IPMI_HPM_2	260

/*
 * per  Joshua Wright <jwright@hasborg.com>, formats for Zwave captures.
 */
#define DLT_ZWAVE_R1_R2  261
#define DLT_ZWAVE_R3     262

/*
 * per Steve Karg <skarg@users.sourceforge.net>, formats for Wattstopper
 * Digital Lighting Management room bus serial protocol captures.
 */
#define DLT_WATTSTOPPER_DLM     263

/*
 * ISO 14443 contactless smart card messages.
 */
#define DLT_ISO_14443	264

/*
 * Radio data system (RDS) groups.  IEC 62106.
 * Per Jonathan Brucker <jonathan.brucke@gmail.com>.
 */
#define DLT_RDS		265

/*
 * USB packets, beginning with a Darwin (macOS, etc.) header.
 */
#define DLT_USB_DARWIN	266

/*
 * OpenBSD DLT_OPENFLOW.
 */
#define DLT_OPENFLOW	267

/*
 * SDLC frames containing SNA PDUs.
 */
#define DLT_SDLC	268

/*
 * per "Selvig, Bjorn" <b.selvig@ti.com> used for
 * TI protocol sniffer.
 */
#define DLT_TI_LLN_SNIFFER	269

/*
 * per: Erik de Jong <erikdejong at gmail.com> for
 *   https://github.com/eriknl/LoRaTap/releases/tag/v0.1
 */
#define DLT_LORATAP             270

/*
 * per: Stefanha at gmail.com for
 *   http://lists.sandelman.ca/pipermail/tcpdump-workers/2017-May/000772.html
 * and: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/uapi/linux/vsockmon.h
 * for: http://qemu-project.org/Features/VirtioVsock
 */
#define DLT_VSOCK               271

/*
 * Nordic Semiconductor Bluetooth LE sniffer.
 */
#define DLT_NORDIC_BLE		272

/*
 * Excentis DOCSIS 3.1 RF sniffer (XRA-31)
 *   per: bruno.verstuyft at excentis.com
 *        http://www.xra31.com/xra-header
 */
#define DLT_DOCSIS31_XRA31	273

/*
 * mPackets, as specified by IEEE 802.3br Figure 99-4, starting
 * with the preamble and always ending with a CRC field.
 */
#define DLT_ETHERNET_MPACKET	274

/*
 * DisplayPort AUX channel monitoring data as specified by VESA
 * DisplayPort(DP) Standard preceeded by a pseudo-header.
 *    per dirk.eibach at gdsys.cc
 */
#define DLT_DISPLAYPORT_AUX	275

/*
 * Linux cooked sockets v2.
 */
#define DLT_LINUX_SLL2	276

/*
 * In case the code that includes this file (directly or indirectly)
 * has also included OS files that happen to define DLT_MATCHING_MAX,
 * with a different value (perhaps because that OS hasn't picked up
 * the latest version of our DLT definitions), we undefine the
 * previous value of DLT_MATCHING_MAX.
 */
#ifdef DLT_MATCHING_MAX
#undef DLT_MATCHING_MAX
#endif
#define DLT_MATCHING_MAX	276	/* highest value in the "matching" range */

/*
 * DLT and savefile link type values are split into a class and
 * a member of that class.  A class value of 0 indicates a regular
 * DLT_/LINKTYPE_ value.
 */
#define DLT_CLASS(x)		((x) & 0x03ff0000)

/*
 * NetBSD-specific generic "raw" link type.  The class value indicates
 * that this is the generic raw type, and the lower 16 bits are the
 * address family we're dealing with.  Those values are NetBSD-specific;
 * do not assume that they correspond to AF_ values for your operating
 * system.
 */
#define	DLT_CLASS_NETBSD_RAWAF	0x02240000
#define	DLT_NETBSD_RAWAF(af)	(DLT_CLASS_NETBSD_RAWAF | (af))
#define	DLT_NETBSD_RAWAF_AF(x)	((x) & 0x0000ffff)
#define	DLT_IS_NETBSD_RAWAF(x)	(DLT_CLASS(x) == DLT_CLASS_NETBSD_RAWAF)

#endif /* !defined(lib_pcap_dlt_h) */