1 /*
2 * Copyright (c) 1993, 1994, 1995, 1996, 1997
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 *
21 * pcap-common.c - common code for pcap and pcapng files
22 */
23
24 #ifdef HAVE_CONFIG_H
25 #include <config.h>
26 #endif
27
28 #include <pcap-types.h>
29
30 #include "pcap-int.h"
31
32 #include "pcap-common.h"
33
34 /*
35 * We don't write DLT_* values to capture files, because they're not the
36 * same on all platforms.
37 *
38 * Unfortunately, the various flavors of BSD have not always used the same
39 * numerical values for the same data types, and various patches to
40 * libpcap for non-BSD OSes have added their own DLT_* codes for link
41 * layer encapsulation types seen on those OSes, and those codes have had,
42 * in some cases, values that were also used, on other platforms, for other
43 * link layer encapsulation types.
44 *
45 * This means that capture files of a type whose numerical DLT_* code
46 * means different things on different BSDs, or with different versions
47 * of libpcap, can't always be read on systems other than those like
48 * the one running on the machine on which the capture was made.
49 *
50 * Instead, we define here a set of LINKTYPE_* codes, and map DLT_* codes
51 * to LINKTYPE_* codes when writing a savefile header, and map LINKTYPE_*
52 * codes to DLT_* codes when reading a savefile header.
53 *
54 * For those DLT_* codes that have, as far as we know, the same values on
55 * all platforms (DLT_NULL through DLT_FDDI), we define LINKTYPE_xxx as
56 * DLT_xxx; that way, captures of those types can still be read by
57 * versions of libpcap that map LINKTYPE_* values to DLT_* values, and
58 * captures of those types written by versions of libpcap that map DLT_
59 * values to LINKTYPE_ values can still be read by older versions
60 * of libpcap.
61 *
62 * The other LINKTYPE_* codes are given values starting at 100, in the
63 * hopes that no DLT_* code will be given one of those values.
64 *
65 * In order to ensure that a given LINKTYPE_* code's value will refer to
66 * the same encapsulation type on all platforms, you should not allocate
67 * a new LINKTYPE_* value without consulting
68 * "tcpdump-workers@lists.tcpdump.org". The tcpdump developers will
69 * allocate a value for you, and will not subsequently allocate it to
70 * anybody else; that value will be added to the "pcap.h" in the
71 * tcpdump.org Git repository, so that a future libpcap release will
72 * include it.
73 *
74 * You should, if possible, also contribute patches to libpcap and tcpdump
75 * to handle the new encapsulation type, so that they can also be checked
76 * into the tcpdump.org Git repository and so that they will appear in
77 * future libpcap and tcpdump releases.
78 *
79 * Do *NOT* assume that any values after the largest value in this file
80 * are available; you might not have the most up-to-date version of this
81 * file, and new values after that one might have been assigned. Also,
82 * do *NOT* use any values below 100 - those might already have been
83 * taken by one (or more!) organizations.
84 *
85 * Any platform that defines additional DLT_* codes should:
86 *
87 * request a LINKTYPE_* code and value from tcpdump.org,
88 * as per the above;
89 *
90 * add, in their version of libpcap, an entry to map
91 * those DLT_* codes to the corresponding LINKTYPE_*
92 * code;
93 *
94 * redefine, in their "net/bpf.h", any DLT_* values
95 * that collide with the values used by their additional
96 * DLT_* codes, to remove those collisions (but without
97 * making them collide with any of the LINKTYPE_*
98 * values equal to 50 or above; they should also avoid
99 * defining DLT_* values that collide with those
100 * LINKTYPE_* values, either).
101 */
102 #define LINKTYPE_NULL DLT_NULL
103 #define LINKTYPE_ETHERNET DLT_EN10MB /* also for 100Mb and up */
104 #define LINKTYPE_EXP_ETHERNET DLT_EN3MB /* 3Mb experimental Ethernet */
105 #define LINKTYPE_AX25 DLT_AX25
106 #define LINKTYPE_PRONET DLT_PRONET
107 #define LINKTYPE_CHAOS DLT_CHAOS
108 #define LINKTYPE_IEEE802_5 DLT_IEEE802 /* DLT_IEEE802 is used for 802.5 Token Ring */
109 #define LINKTYPE_ARCNET_BSD DLT_ARCNET /* BSD-style headers */
110 #define LINKTYPE_SLIP DLT_SLIP
111 #define LINKTYPE_PPP DLT_PPP
112 #define LINKTYPE_FDDI DLT_FDDI
113
114 /*
115 * LINKTYPE_PPP is for use when there might, or might not, be an RFC 1662
116 * PPP in HDLC-like framing header (with 0xff 0x03 before the PPP protocol
117 * field) at the beginning of the packet.
118 *
119 * This is for use when there is always such a header; the address field
120 * might be 0xff, for regular PPP, or it might be an address field for Cisco
121 * point-to-point with HDLC framing as per section 4.3.1 of RFC 1547 ("Cisco
122 * HDLC"). This is, for example, what you get with NetBSD's DLT_PPP_SERIAL.
123 *
124 * We give it the same value as NetBSD's DLT_PPP_SERIAL, in the hopes that
125 * nobody else will choose a DLT_ value of 50, and so that DLT_PPP_SERIAL
126 * captures will be written out with a link type that NetBSD's tcpdump
127 * can read.
128 */
129 #define LINKTYPE_PPP_HDLC 50 /* PPP in HDLC-like framing */
130
131 #define LINKTYPE_PPP_ETHER 51 /* NetBSD PPP-over-Ethernet */
132
133 #define LINKTYPE_SYMANTEC_FIREWALL 99 /* Symantec Enterprise Firewall */
134
135 /*
136 * These correspond to DLT_s that have different values on different
137 * platforms; we map between these values in capture files and
138 * the DLT_ values as returned by pcap_datalink() and passed to
139 * pcap_open_dead().
140 */
141 #define LINKTYPE_ATM_RFC1483 100 /* LLC/SNAP-encapsulated ATM */
142 #define LINKTYPE_RAW 101 /* raw IP */
143 #define LINKTYPE_SLIP_BSDOS 102 /* BSD/OS SLIP BPF header */
144 #define LINKTYPE_PPP_BSDOS 103 /* BSD/OS PPP BPF header */
145
146 /*
147 * Values starting with 104 are used for newly-assigned link-layer
148 * header type values; for those link-layer header types, the DLT_
149 * value returned by pcap_datalink() and passed to pcap_open_dead(),
150 * and the LINKTYPE_ value that appears in capture files, are the
151 * same.
152 *
153 * LINKTYPE_MATCHING_MIN is the lowest such value; LINKTYPE_MATCHING_MAX
154 * is the highest such value.
155 */
156 #define LINKTYPE_MATCHING_MIN 104 /* lowest value in the "matching" range */
157
158 #define LINKTYPE_C_HDLC 104 /* Cisco HDLC */
159 #define LINKTYPE_IEEE802_11 105 /* IEEE 802.11 (wireless) */
160 #define LINKTYPE_ATM_CLIP 106 /* Linux Classical IP over ATM */
161 #define LINKTYPE_FRELAY 107 /* Frame Relay */
162 #define LINKTYPE_LOOP 108 /* OpenBSD loopback */
163 #define LINKTYPE_ENC 109 /* OpenBSD IPSEC enc */
164
165 /*
166 * These two types are reserved for future use.
167 */
168 #define LINKTYPE_LANE8023 110 /* ATM LANE + 802.3 */
169 #define LINKTYPE_HIPPI 111 /* NetBSD HIPPI */
170
171 /*
172 * Used for NetBSD DLT_HDLC; from looking at the one driver in NetBSD
173 * that uses it, it's Cisco HDLC, so it's the same as DLT_C_HDLC/
174 * LINKTYPE_C_HDLC, but we define a separate value to avoid some
175 * compatibility issues with programs on NetBSD.
176 *
177 * All code should treat LINKTYPE_NETBSD_HDLC and LINKTYPE_C_HDLC the same.
178 */
179 #define LINKTYPE_NETBSD_HDLC 112 /* NetBSD HDLC framing */
180
181 #define LINKTYPE_LINUX_SLL 113 /* Linux cooked socket capture */
182 #define LINKTYPE_LTALK 114 /* Apple LocalTalk hardware */
183 #define LINKTYPE_ECONET 115 /* Acorn Econet */
184
185 /*
186 * Reserved for use with OpenBSD ipfilter.
187 */
188 #define LINKTYPE_IPFILTER 116
189
190 #define LINKTYPE_PFLOG 117 /* OpenBSD DLT_PFLOG */
191 #define LINKTYPE_CISCO_IOS 118 /* For Cisco-internal use */
192 #define LINKTYPE_IEEE802_11_PRISM 119 /* 802.11 plus Prism II monitor mode radio metadata header */
193 #define LINKTYPE_IEEE802_11_AIRONET 120 /* 802.11 plus FreeBSD Aironet driver radio metadata header */
194
195 /*
196 * Reserved for Siemens HiPath HDLC.
197 */
198 #define LINKTYPE_HHDLC 121
199
200 #define LINKTYPE_IP_OVER_FC 122 /* RFC 2625 IP-over-Fibre Channel */
201 #define LINKTYPE_SUNATM 123 /* Solaris+SunATM */
202
203 /*
204 * Reserved as per request from Kent Dahlgren <kent@praesum.com>
205 * for private use.
206 */
207 #define LINKTYPE_RIO 124 /* RapidIO */
208 #define LINKTYPE_PCI_EXP 125 /* PCI Express */
209 #define LINKTYPE_AURORA 126 /* Xilinx Aurora link layer */
210
211 #define LINKTYPE_IEEE802_11_RADIOTAP 127 /* 802.11 plus radiotap radio metadata header */
212
213 /*
214 * Reserved for the TZSP encapsulation, as per request from
215 * Chris Waters <chris.waters@networkchemistry.com>
216 * TZSP is a generic encapsulation for any other link type,
217 * which includes a means to include meta-information
218 * with the packet, e.g. signal strength and channel
219 * for 802.11 packets.
220 */
221 #define LINKTYPE_TZSP 128 /* Tazmen Sniffer Protocol */
222
223 #define LINKTYPE_ARCNET_LINUX 129 /* Linux-style headers */
224
225 /*
226 * Juniper-private data link types, as per request from
227 * Hannes Gredler <hannes@juniper.net>. The corresponding
228 * DLT_s are used for passing on chassis-internal
229 * metainformation such as QOS profiles, etc..
230 */
231 #define LINKTYPE_JUNIPER_MLPPP 130
232 #define LINKTYPE_JUNIPER_MLFR 131
233 #define LINKTYPE_JUNIPER_ES 132
234 #define LINKTYPE_JUNIPER_GGSN 133
235 #define LINKTYPE_JUNIPER_MFR 134
236 #define LINKTYPE_JUNIPER_ATM2 135
237 #define LINKTYPE_JUNIPER_SERVICES 136
238 #define LINKTYPE_JUNIPER_ATM1 137
239
240 #define LINKTYPE_APPLE_IP_OVER_IEEE1394 138 /* Apple IP-over-IEEE 1394 cooked header */
241
242 #define LINKTYPE_MTP2_WITH_PHDR 139
243 #define LINKTYPE_MTP2 140
244 #define LINKTYPE_MTP3 141
245 #define LINKTYPE_SCCP 142
246
247 #define LINKTYPE_DOCSIS 143 /* DOCSIS MAC frames */
248
249 #define LINKTYPE_LINUX_IRDA 144 /* Linux-IrDA */
250
251 /*
252 * Reserved for IBM SP switch and IBM Next Federation switch.
253 */
254 #define LINKTYPE_IBM_SP 145
255 #define LINKTYPE_IBM_SN 146
256
257 /*
258 * Reserved for private use. If you have some link-layer header type
259 * that you want to use within your organization, with the capture files
260 * using that link-layer header type not ever be sent outside your
261 * organization, you can use these values.
262 *
263 * No libpcap release will use these for any purpose, nor will any
264 * tcpdump release use them, either.
265 *
266 * Do *NOT* use these in capture files that you expect anybody not using
267 * your private versions of capture-file-reading tools to read; in
268 * particular, do *NOT* use them in products, otherwise you may find that
269 * people won't be able to use tcpdump, or snort, or Ethereal, or... to
270 * read capture files from your firewall/intrusion detection/traffic
271 * monitoring/etc. appliance, or whatever product uses that LINKTYPE_ value,
272 * and you may also find that the developers of those applications will
273 * not accept patches to let them read those files.
274 *
275 * Also, do not use them if somebody might send you a capture using them
276 * for *their* private type and tools using them for *your* private type
277 * would have to read them.
278 *
279 * Instead, in those cases, ask "tcpdump-workers@lists.tcpdump.org" for a
280 * new DLT_ and LINKTYPE_ value, as per the comment in pcap/bpf.h, and use
281 * the type you're given.
282 */
283 #define LINKTYPE_USER0 147
284 #define LINKTYPE_USER1 148
285 #define LINKTYPE_USER2 149
286 #define LINKTYPE_USER3 150
287 #define LINKTYPE_USER4 151
288 #define LINKTYPE_USER5 152
289 #define LINKTYPE_USER6 153
290 #define LINKTYPE_USER7 154
291 #define LINKTYPE_USER8 155
292 #define LINKTYPE_USER9 156
293 #define LINKTYPE_USER10 157
294 #define LINKTYPE_USER11 158
295 #define LINKTYPE_USER12 159
296 #define LINKTYPE_USER13 160
297 #define LINKTYPE_USER14 161
298 #define LINKTYPE_USER15 162
299
300 /*
301 * For future use with 802.11 captures - defined by AbsoluteValue
302 * Systems to store a number of bits of link-layer information
303 * including radio information:
304 *
305 * http://www.shaftnet.org/~pizza/software/capturefrm.txt
306 */
307 #define LINKTYPE_IEEE802_11_AVS 163 /* 802.11 plus AVS radio metadata header */
308
309 /*
310 * Juniper-private data link type, as per request from
311 * Hannes Gredler <hannes@juniper.net>. The corresponding
312 * DLT_s are used for passing on chassis-internal
313 * metainformation such as QOS profiles, etc..
314 */
315 #define LINKTYPE_JUNIPER_MONITOR 164
316
317 /*
318 * BACnet MS/TP frames.
319 */
320 #define LINKTYPE_BACNET_MS_TP 165
321
322 /*
323 * Another PPP variant as per request from Karsten Keil <kkeil@suse.de>.
324 *
325 * This is used in some OSes to allow a kernel socket filter to distinguish
326 * between incoming and outgoing packets, on a socket intended to
327 * supply pppd with outgoing packets so it can do dial-on-demand and
328 * hangup-on-lack-of-demand; incoming packets are filtered out so they
329 * don't cause pppd to hold the connection up (you don't want random
330 * input packets such as port scans, packets from old lost connections,
331 * etc. to force the connection to stay up).
332 *
333 * The first byte of the PPP header (0xff03) is modified to accommodate
334 * the direction - 0x00 = IN, 0x01 = OUT.
335 */
336 #define LINKTYPE_PPP_PPPD 166
337
338 /*
339 * Juniper-private data link type, as per request from
340 * Hannes Gredler <hannes@juniper.net>. The DLT_s are used
341 * for passing on chassis-internal metainformation such as
342 * QOS profiles, cookies, etc..
343 */
344 #define LINKTYPE_JUNIPER_PPPOE 167
345 #define LINKTYPE_JUNIPER_PPPOE_ATM 168
346
347 #define LINKTYPE_GPRS_LLC 169 /* GPRS LLC */
348 #define LINKTYPE_GPF_T 170 /* GPF-T (ITU-T G.7041/Y.1303) */
349 #define LINKTYPE_GPF_F 171 /* GPF-F (ITU-T G.7041/Y.1303) */
350
351 /*
352 * Requested by Oolan Zimmer <oz@gcom.com> for use in Gcom's T1/E1 line
353 * monitoring equipment.
354 */
355 #define LINKTYPE_GCOM_T1E1 172
356 #define LINKTYPE_GCOM_SERIAL 173
357
358 /*
359 * Juniper-private data link type, as per request from
360 * Hannes Gredler <hannes@juniper.net>. The DLT_ is used
361 * for internal communication to Physical Interface Cards (PIC)
362 */
363 #define LINKTYPE_JUNIPER_PIC_PEER 174
364
365 /*
366 * Link types requested by Gregor Maier <gregor@endace.com> of Endace
367 * Measurement Systems. They add an ERF header (see
368 * https://www.endace.com/support/EndaceRecordFormat.pdf) in front of
369 * the link-layer header.
370 */
371 #define LINKTYPE_ERF_ETH 175 /* Ethernet */
372 #define LINKTYPE_ERF_POS 176 /* Packet-over-SONET */
373
374 /*
375 * Requested by Daniele Orlandi <daniele@orlandi.com> for raw LAPD
376 * for vISDN (http://www.orlandi.com/visdn/). Its link-layer header
377 * includes additional information before the LAPD header, so it's
378 * not necessarily a generic LAPD header.
379 */
380 #define LINKTYPE_LINUX_LAPD 177
381
382 /*
383 * Juniper-private data link type, as per request from
384 * Hannes Gredler <hannes@juniper.net>.
385 * The Link Types are used for prepending meta-information
386 * like interface index, interface name
387 * before standard Ethernet, PPP, Frelay & C-HDLC Frames
388 */
389 #define LINKTYPE_JUNIPER_ETHER 178
390 #define LINKTYPE_JUNIPER_PPP 179
391 #define LINKTYPE_JUNIPER_FRELAY 180
392 #define LINKTYPE_JUNIPER_CHDLC 181
393
394 /*
395 * Multi Link Frame Relay (FRF.16)
396 */
397 #define LINKTYPE_MFR 182
398
399 /*
400 * Juniper-private data link type, as per request from
401 * Hannes Gredler <hannes@juniper.net>.
402 * The DLT_ is used for internal communication with a
403 * voice Adapter Card (PIC)
404 */
405 #define LINKTYPE_JUNIPER_VP 183
406
407 /*
408 * Arinc 429 frames.
409 * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>.
410 * Every frame contains a 32bit A429 label.
411 * More documentation on Arinc 429 can be found at
412 * https://web.archive.org/web/20040616233302/https://www.condoreng.com/support/downloads/tutorials/ARINCTutorial.pdf
413 */
414 #define LINKTYPE_A429 184
415
416 /*
417 * Arinc 653 Interpartition Communication messages.
418 * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>.
419 * Please refer to the A653-1 standard for more information.
420 */
421 #define LINKTYPE_A653_ICM 185
422
423 /*
424 * This used to be "USB packets, beginning with a USB setup header;
425 * requested by Paolo Abeni <paolo.abeni@email.it>."
426 *
427 * However, that header didn't work all that well - it left out some
428 * useful information - and was abandoned in favor of the DLT_USB_LINUX
429 * header.
430 *
431 * This is now used by FreeBSD for its BPF taps for USB; that has its
432 * own headers. So it is written, so it is done.
433 */
434 #define LINKTYPE_USB_FREEBSD 186
435
436 /*
437 * Bluetooth HCI UART transport layer (part H:4); requested by
438 * Paolo Abeni.
439 */
440 #define LINKTYPE_BLUETOOTH_HCI_H4 187
441
442 /*
443 * IEEE 802.16 MAC Common Part Sublayer; requested by Maria Cruz
444 * <cruz_petagay@bah.com>.
445 */
446 #define LINKTYPE_IEEE802_16_MAC_CPS 188
447
448 /*
449 * USB packets, beginning with a Linux USB header; requested by
450 * Paolo Abeni <paolo.abeni@email.it>.
451 */
452 #define LINKTYPE_USB_LINUX 189
453
454 /*
455 * Controller Area Network (CAN) v. 2.0B packets.
456 * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>.
457 * Used to dump CAN packets coming from a CAN Vector board.
458 * More documentation on the CAN v2.0B frames can be found at
459 * http://www.can-cia.org/downloads/?269
460 */
461 #define LINKTYPE_CAN20B 190
462
463 /*
464 * IEEE 802.15.4, with address fields padded, as is done by Linux
465 * drivers; requested by Juergen Schimmer.
466 */
467 #define LINKTYPE_IEEE802_15_4_LINUX 191
468
469 /*
470 * Per Packet Information encapsulated packets.
471 * LINKTYPE_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>.
472 */
473 #define LINKTYPE_PPI 192
474
475 /*
476 * Header for 802.16 MAC Common Part Sublayer plus a radiotap radio header;
477 * requested by Charles Clancy.
478 */
479 #define LINKTYPE_IEEE802_16_MAC_CPS_RADIO 193
480
481 /*
482 * Juniper-private data link type, as per request from
483 * Hannes Gredler <hannes@juniper.net>.
484 * The DLT_ is used for internal communication with a
485 * integrated service module (ISM).
486 */
487 #define LINKTYPE_JUNIPER_ISM 194
488
489 /*
490 * IEEE 802.15.4, exactly as it appears in the spec (no padding, no
491 * nothing), and with the FCS at the end of the frame; requested by
492 * Mikko Saarnivala <mikko.saarnivala@sensinode.com>.
493 *
494 * This should only be used if the FCS is present at the end of the
495 * frame; if the frame has no FCS, DLT_IEEE802_15_4_NOFCS should be
496 * used.
497 */
498 #define LINKTYPE_IEEE802_15_4_WITHFCS 195
499
500 /*
501 * Various link-layer types, with a pseudo-header, for SITA
502 * (https://www.sita.aero/); requested by Fulko Hew (fulko.hew@gmail.com).
503 */
504 #define LINKTYPE_SITA 196
505
506 /*
507 * Various link-layer types, with a pseudo-header, for Endace DAG cards;
508 * encapsulates Endace ERF records. Requested by Stephen Donnelly
509 * <stephen@endace.com>.
510 */
511 #define LINKTYPE_ERF 197
512
513 /*
514 * Special header prepended to Ethernet packets when capturing from a
515 * u10 Networks board. Requested by Phil Mulholland
516 * <phil@u10networks.com>.
517 */
518 #define LINKTYPE_RAIF1 198
519
520 /*
521 * IPMB packet for IPMI, beginning with a 2-byte header, followed by
522 * the I2C slave address, followed by the netFn and LUN, etc..
523 * Requested by Chanthy Toeung <chanthy.toeung@ca.kontron.com>.
524 *
525 * XXX - its DLT_ value used to be called DLT_IPMB, back when we got the
526 * impression from the email thread requesting it that the packet
527 * had no extra 2-byte header. We've renamed it; if anybody used
528 * DLT_IPMB and assumed no 2-byte header, this will cause the compile
529 * to fail, at which point we'll have to figure out what to do about
530 * the two header types using the same DLT_/LINKTYPE_ value. If that
531 * doesn't happen, we'll assume nobody used it and that the redefinition
532 * is safe.
533 */
534 #define LINKTYPE_IPMB_KONTRON 199
535
536 /*
537 * Juniper-private data link type, as per request from
538 * Hannes Gredler <hannes@juniper.net>.
539 * The DLT_ is used for capturing data on a secure tunnel interface.
540 */
541 #define LINKTYPE_JUNIPER_ST 200
542
543 /*
544 * Bluetooth HCI UART transport layer (part H:4), with pseudo-header
545 * that includes direction information; requested by Paolo Abeni.
546 */
547 #define LINKTYPE_BLUETOOTH_HCI_H4_WITH_PHDR 201
548
549 /*
550 * AX.25 packet with a 1-byte KISS header; see
551 *
552 * http://www.ax25.net/kiss.htm
553 *
554 * as per Richard Stearn <richard@rns-stearn.demon.co.uk>.
555 */
556 #define LINKTYPE_AX25_KISS 202
557
558 /*
559 * LAPD packets from an ISDN channel, starting with the address field,
560 * with no pseudo-header.
561 * Requested by Varuna De Silva <varunax@gmail.com>.
562 */
563 #define LINKTYPE_LAPD 203
564
565 /*
566 * PPP, with a one-byte direction pseudo-header prepended - zero means
567 * "received by this host", non-zero (any non-zero value) means "sent by
568 * this host" - as per Will Barker <w.barker@zen.co.uk>.
569 */
570 #define LINKTYPE_PPP_WITH_DIR 204 /* Don't confuse with LINKTYPE_PPP_PPPD */
571
572 /*
573 * Cisco HDLC, with a one-byte direction pseudo-header prepended - zero
574 * means "received by this host", non-zero (any non-zero value) means
575 * "sent by this host" - as per Will Barker <w.barker@zen.co.uk>.
576 */
577 #define LINKTYPE_C_HDLC_WITH_DIR 205 /* Cisco HDLC */
578
579 /*
580 * Frame Relay, with a one-byte direction pseudo-header prepended - zero
581 * means "received by this host" (DCE -> DTE), non-zero (any non-zero
582 * value) means "sent by this host" (DTE -> DCE) - as per Will Barker
583 * <w.barker@zen.co.uk>.
584 */
585 #define LINKTYPE_FRELAY_WITH_DIR 206 /* Frame Relay */
586
587 /*
588 * LAPB, with a one-byte direction pseudo-header prepended - zero means
589 * "received by this host" (DCE -> DTE), non-zero (any non-zero value)
590 * means "sent by this host" (DTE -> DCE)- as per Will Barker
591 * <w.barker@zen.co.uk>.
592 */
593 #define LINKTYPE_LAPB_WITH_DIR 207 /* LAPB */
594
595 /*
596 * 208 is reserved for an as-yet-unspecified proprietary link-layer
597 * type, as requested by Will Barker.
598 */
599
600 /*
601 * IPMB with a Linux-specific pseudo-header; as requested by Alexey Neyman
602 * <avn@pigeonpoint.com>.
603 */
604 #define LINKTYPE_IPMB_LINUX 209
605
606 /*
607 * FlexRay automotive bus - http://www.flexray.com/ - as requested
608 * by Hannes Kaelber <hannes.kaelber@x2e.de>.
609 */
610 #define LINKTYPE_FLEXRAY 210
611
612 /*
613 * Media Oriented Systems Transport (MOST) bus for multimedia
614 * transport - https://www.mostcooperation.com/ - as requested
615 * by Hannes Kaelber <hannes.kaelber@x2e.de>.
616 */
617 #define LINKTYPE_MOST 211
618
619 /*
620 * Local Interconnect Network (LIN) bus for vehicle networks -
621 * http://www.lin-subbus.org/ - as requested by Hannes Kaelber
622 * <hannes.kaelber@x2e.de>.
623 */
624 #define LINKTYPE_LIN 212
625
626 /*
627 * X2E-private data link type used for serial line capture,
628 * as requested by Hannes Kaelber <hannes.kaelber@x2e.de>.
629 */
630 #define LINKTYPE_X2E_SERIAL 213
631
632 /*
633 * X2E-private data link type used for the Xoraya data logger
634 * family, as requested by Hannes Kaelber <hannes.kaelber@x2e.de>.
635 */
636 #define LINKTYPE_X2E_XORAYA 214
637
638 /*
639 * IEEE 802.15.4, exactly as it appears in the spec (no padding, no
640 * nothing), but with the PHY-level data for non-ASK PHYs (4 octets
641 * of 0 as preamble, one octet of SFD, one octet of frame length+
642 * reserved bit, and then the MAC-layer data, starting with the
643 * frame control field).
644 *
645 * Requested by Max Filippov <jcmvbkbc@gmail.com>.
646 */
647 #define LINKTYPE_IEEE802_15_4_NONASK_PHY 215
648
649 /*
650 * David Gibson <david@gibson.dropbear.id.au> requested this for
651 * captures from the Linux kernel /dev/input/eventN devices. This
652 * is used to communicate keystrokes and mouse movements from the
653 * Linux kernel to display systems, such as Xorg.
654 */
655 #define LINKTYPE_LINUX_EVDEV 216
656
657 /*
658 * GSM Um and Abis interfaces, preceded by a "gsmtap" header.
659 *
660 * Requested by Harald Welte <laforge@gnumonks.org>.
661 */
662 #define LINKTYPE_GSMTAP_UM 217
663 #define LINKTYPE_GSMTAP_ABIS 218
664
665 /*
666 * MPLS, with an MPLS label as the link-layer header.
667 * Requested by Michele Marchetto <michele@openbsd.org> on behalf
668 * of OpenBSD.
669 */
670 #define LINKTYPE_MPLS 219
671
672 /*
673 * USB packets, beginning with a Linux USB header, with the USB header
674 * padded to 64 bytes; required for memory-mapped access.
675 */
676 #define LINKTYPE_USB_LINUX_MMAPPED 220
677
678 /*
679 * DECT packets, with a pseudo-header; requested by
680 * Matthias Wenzel <tcpdump@mazzoo.de>.
681 */
682 #define LINKTYPE_DECT 221
683
684 /*
685 * From: "Lidwa, Eric (GSFC-582.0)[SGT INC]" <eric.lidwa-1@nasa.gov>
686 * Date: Mon, 11 May 2009 11:18:30 -0500
687 *
688 * DLT_AOS. We need it for AOS Space Data Link Protocol.
689 * I have already written dissectors for but need an OK from
690 * legal before I can submit a patch.
691 *
692 */
693 #define LINKTYPE_AOS 222
694
695 /*
696 * Wireless HART (Highway Addressable Remote Transducer)
697 * From the HART Communication Foundation
698 * IES/PAS 62591
699 *
700 * Requested by Sam Roberts <vieuxtech@gmail.com>.
701 */
702 #define LINKTYPE_WIHART 223
703
704 /*
705 * Fibre Channel FC-2 frames, beginning with a Frame_Header.
706 * Requested by Kahou Lei <kahou82@gmail.com>.
707 */
708 #define LINKTYPE_FC_2 224
709
710 /*
711 * Fibre Channel FC-2 frames, beginning with an encoding of the
712 * SOF, and ending with an encoding of the EOF.
713 *
714 * The encodings represent the frame delimiters as 4-byte sequences
715 * representing the corresponding ordered sets, with K28.5
716 * represented as 0xBC, and the D symbols as the corresponding
717 * byte values; for example, SOFi2, which is K28.5 - D21.5 - D1.2 - D21.2,
718 * is represented as 0xBC 0xB5 0x55 0x55.
719 *
720 * Requested by Kahou Lei <kahou82@gmail.com>.
721 */
722 #define LINKTYPE_FC_2_WITH_FRAME_DELIMS 225
723
724 /*
725 * Solaris ipnet pseudo-header; requested by Darren Reed <Darren.Reed@Sun.COM>.
726 *
727 * The pseudo-header starts with a one-byte version number; for version 2,
728 * the pseudo-header is:
729 *
730 * struct dl_ipnetinfo {
731 * uint8_t dli_version;
732 * uint8_t dli_family;
733 * uint16_t dli_htype;
734 * uint32_t dli_pktlen;
735 * uint32_t dli_ifindex;
736 * uint32_t dli_grifindex;
737 * uint32_t dli_zsrc;
738 * uint32_t dli_zdst;
739 * };
740 *
741 * dli_version is 2 for the current version of the pseudo-header.
742 *
743 * dli_family is a Solaris address family value, so it's 2 for IPv4
744 * and 26 for IPv6.
745 *
746 * dli_htype is a "hook type" - 0 for incoming packets, 1 for outgoing
747 * packets, and 2 for packets arriving from another zone on the same
748 * machine.
749 *
750 * dli_pktlen is the length of the packet data following the pseudo-header
751 * (so the captured length minus dli_pktlen is the length of the
752 * pseudo-header, assuming the entire pseudo-header was captured).
753 *
754 * dli_ifindex is the interface index of the interface on which the
755 * packet arrived.
756 *
757 * dli_grifindex is the group interface index number (for IPMP interfaces).
758 *
759 * dli_zsrc is the zone identifier for the source of the packet.
760 *
761 * dli_zdst is the zone identifier for the destination of the packet.
762 *
763 * A zone number of 0 is the global zone; a zone number of 0xffffffff
764 * means that the packet arrived from another host on the network, not
765 * from another zone on the same machine.
766 *
767 * An IPv4 or IPv6 datagram follows the pseudo-header; dli_family indicates
768 * which of those it is.
769 */
770 #define LINKTYPE_IPNET 226
771
772 /*
773 * CAN (Controller Area Network) frames, with a pseudo-header as supplied
774 * by Linux SocketCAN, and with multi-byte numerical fields in that header
775 * in big-endian byte order.
776 *
777 * See Documentation/networking/can.txt in the Linux source.
778 *
779 * Requested by Felix Obenhuber <felix@obenhuber.de>.
780 */
781 #define LINKTYPE_CAN_SOCKETCAN 227
782
783 /*
784 * Raw IPv4/IPv6; different from DLT_RAW in that the DLT_ value specifies
785 * whether it's v4 or v6. Requested by Darren Reed <Darren.Reed@Sun.COM>.
786 */
787 #define LINKTYPE_IPV4 228
788 #define LINKTYPE_IPV6 229
789
790 /*
791 * IEEE 802.15.4, exactly as it appears in the spec (no padding, no
792 * nothing), and with no FCS at the end of the frame; requested by
793 * Jon Smirl <jonsmirl@gmail.com>.
794 */
795 #define LINKTYPE_IEEE802_15_4_NOFCS 230
796
797 /*
798 * Raw D-Bus:
799 *
800 * https://www.freedesktop.org/wiki/Software/dbus
801 *
802 * messages:
803 *
804 * https://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-messages
805 *
806 * starting with the endianness flag, followed by the message type, etc.,
807 * but without the authentication handshake before the message sequence:
808 *
809 * https://dbus.freedesktop.org/doc/dbus-specification.html#auth-protocol
810 *
811 * Requested by Martin Vidner <martin@vidner.net>.
812 */
813 #define LINKTYPE_DBUS 231
814
815 /*
816 * Juniper-private data link type, as per request from
817 * Hannes Gredler <hannes@juniper.net>.
818 */
819 #define LINKTYPE_JUNIPER_VS 232
820 #define LINKTYPE_JUNIPER_SRX_E2E 233
821 #define LINKTYPE_JUNIPER_FIBRECHANNEL 234
822
823 /*
824 * DVB-CI (DVB Common Interface for communication between a PC Card
825 * module and a DVB receiver). See
826 *
827 * https://www.kaiser.cx/pcap-dvbci.html
828 *
829 * for the specification.
830 *
831 * Requested by Martin Kaiser <martin@kaiser.cx>.
832 */
833 #define LINKTYPE_DVB_CI 235
834
835 /*
836 * Variant of 3GPP TS 27.010 multiplexing protocol. Requested
837 * by Hans-Christoph Schemmel <hans-christoph.schemmel@cinterion.com>.
838 */
839 #define LINKTYPE_MUX27010 236
840
841 /*
842 * STANAG 5066 D_PDUs. Requested by M. Baris Demiray
843 * <barisdemiray@gmail.com>.
844 */
845 #define LINKTYPE_STANAG_5066_D_PDU 237
846
847 /*
848 * Juniper-private data link type, as per request from
849 * Hannes Gredler <hannes@juniper.net>.
850 */
851 #define LINKTYPE_JUNIPER_ATM_CEMIC 238
852
853 /*
854 * NetFilter LOG messages
855 * (payload of netlink NFNL_SUBSYS_ULOG/NFULNL_MSG_PACKET packets)
856 *
857 * Requested by Jakub Zawadzki <darkjames-ws@darkjames.pl>
858 */
859 #define LINKTYPE_NFLOG 239
860
861 /*
862 * Hilscher Gesellschaft fuer Systemautomation mbH link-layer type
863 * for Ethernet packets with a 4-byte pseudo-header and always
864 * with the payload including the FCS, as supplied by their
865 * netANALYZER hardware and software.
866 *
867 * Requested by Holger P. Frommer <HPfrommer@hilscher.com>
868 */
869 #define LINKTYPE_NETANALYZER 240
870
871 /*
872 * Hilscher Gesellschaft fuer Systemautomation mbH link-layer type
873 * for Ethernet packets with a 4-byte pseudo-header and FCS and
874 * 1 byte of SFD, as supplied by their netANALYZER hardware and
875 * software.
876 *
877 * Requested by Holger P. Frommer <HPfrommer@hilscher.com>
878 */
879 #define LINKTYPE_NETANALYZER_TRANSPARENT 241
880
881 /*
882 * IP-over-InfiniBand, as specified by RFC 4391.
883 *
884 * Requested by Petr Sumbera <petr.sumbera@oracle.com>.
885 */
886 #define LINKTYPE_IPOIB 242
887
888 /*
889 * MPEG-2 transport stream (ISO 13818-1/ITU-T H.222.0).
890 *
891 * Requested by Guy Martin <gmsoft@tuxicoman.be>.
892 */
893 #define LINKTYPE_MPEG_2_TS 243
894
895 /*
896 * ng4T GmbH's UMTS Iub/Iur-over-ATM and Iub/Iur-over-IP format as
897 * used by their ng40 protocol tester.
898 *
899 * Requested by Jens Grimmer <jens.grimmer@ng4t.com>.
900 */
901 #define LINKTYPE_NG40 244
902
903 /*
904 * Pseudo-header giving adapter number and flags, followed by an NFC
905 * (Near-Field Communications) Logical Link Control Protocol (LLCP) PDU,
906 * as specified by NFC Forum Logical Link Control Protocol Technical
907 * Specification LLCP 1.1.
908 *
909 * Requested by Mike Wakerly <mikey@google.com>.
910 */
911 #define LINKTYPE_NFC_LLCP 245
912
913 /*
914 * pfsync output; DLT_PFSYNC is 18, which collides with DLT_CIP in
915 * SuSE 6.3, on OpenBSD, NetBSD, DragonFly BSD, and macOS, and
916 * is 121, which collides with DLT_HHDLC, in FreeBSD. We pick a
917 * shiny new link-layer header type value that doesn't collide with
918 * anything, in the hopes that future pfsync savefiles, if any,
919 * won't require special hacks to distinguish from other savefiles.
920 *
921 */
922 #define LINKTYPE_PFSYNC 246
923
924 /*
925 * Raw InfiniBand packets, starting with the Local Routing Header.
926 *
927 * Requested by Oren Kladnitsky <orenk@mellanox.com>.
928 */
929 #define LINKTYPE_INFINIBAND 247
930
931 /*
932 * SCTP, with no lower-level protocols (i.e., no IPv4 or IPv6).
933 *
934 * Requested by Michael Tuexen <Michael.Tuexen@lurchi.franken.de>.
935 */
936 #define LINKTYPE_SCTP 248
937
938 /*
939 * USB packets, beginning with a USBPcap header.
940 *
941 * Requested by Tomasz Mon <desowin@gmail.com>
942 */
943 #define LINKTYPE_USBPCAP 249
944
945 /*
946 * Schweitzer Engineering Laboratories "RTAC" product serial-line
947 * packets.
948 *
949 * Requested by Chris Bontje <chris_bontje@selinc.com>.
950 */
951 #define LINKTYPE_RTAC_SERIAL 250
952
953 /*
954 * Bluetooth Low Energy air interface link-layer packets.
955 *
956 * Requested by Mike Kershaw <dragorn@kismetwireless.net>.
957 */
958 #define LINKTYPE_BLUETOOTH_LE_LL 251
959
960 /*
961 * Link-layer header type for upper-protocol layer PDU saves from wireshark.
962 *
963 * the actual contents are determined by two TAGs, one or more of
964 * which is stored with each packet:
965 *
966 * EXP_PDU_TAG_DISSECTOR_NAME the name of the Wireshark dissector
967 * that can make sense of the data stored.
968 *
969 * EXP_PDU_TAG_HEUR_DISSECTOR_NAME the name of the Wireshark heuristic
970 * dissector that can make sense of the
971 * data stored.
972 */
973 #define LINKTYPE_WIRESHARK_UPPER_PDU 252
974
975 /*
976 * Link-layer header type for the netlink protocol (nlmon devices).
977 */
978 #define LINKTYPE_NETLINK 253
979
980 /*
981 * Bluetooth Linux Monitor headers for the BlueZ stack.
982 */
983 #define LINKTYPE_BLUETOOTH_LINUX_MONITOR 254
984
985 /*
986 * Bluetooth Basic Rate/Enhanced Data Rate baseband packets, as
987 * captured by Ubertooth.
988 */
989 #define LINKTYPE_BLUETOOTH_BREDR_BB 255
990
991 /*
992 * Bluetooth Low Energy link layer packets, as captured by Ubertooth.
993 */
994 #define LINKTYPE_BLUETOOTH_LE_LL_WITH_PHDR 256
995
996 /*
997 * PROFIBUS data link layer.
998 */
999 #define LINKTYPE_PROFIBUS_DL 257
1000
1001 /*
1002 * Apple's DLT_PKTAP headers.
1003 *
1004 * Sadly, the folks at Apple either had no clue that the DLT_USERn values
1005 * are for internal use within an organization and partners only, and
1006 * didn't know that the right way to get a link-layer header type is to
1007 * ask tcpdump.org for one, or knew and didn't care, so they just
1008 * used DLT_USER2, which causes problems for everything except for
1009 * their version of tcpdump.
1010 *
1011 * So I'll just give them one; hopefully this will show up in a
1012 * libpcap release in time for them to get this into 10.10 Big Sur
1013 * or whatever Mavericks' successor is called. LINKTYPE_PKTAP
1014 * will be 258 *even on macOS*; that is *intentional*, so that
1015 * PKTAP files look the same on *all* OSes (different OSes can have
1016 * different numerical values for a given DLT_, but *MUST NOT* have
1017 * different values for what goes in a file, as files can be moved
1018 * between OSes!).
1019 */
1020 #define LINKTYPE_PKTAP 258
1021
1022 /*
1023 * Ethernet packets preceded by a header giving the last 6 octets
1024 * of the preamble specified by 802.3-2012 Clause 65, section
1025 * 65.1.3.2 "Transmit".
1026 */
1027 #define LINKTYPE_EPON 259
1028
1029 /*
1030 * IPMI trace packets, as specified by Table 3-20 "Trace Data Block Format"
1031 * in the PICMG HPM.2 specification.
1032 */
1033 #define LINKTYPE_IPMI_HPM_2 260
1034
1035 /*
1036 * per Joshua Wright <jwright@hasborg.com>, formats for Zwave captures.
1037 */
1038 #define LINKTYPE_ZWAVE_R1_R2 261
1039 #define LINKTYPE_ZWAVE_R3 262
1040
1041 /*
1042 * per Steve Karg <skarg@users.sourceforge.net>, formats for Wattstopper
1043 * Digital Lighting Management room bus serial protocol captures.
1044 */
1045 #define LINKTYPE_WATTSTOPPER_DLM 263
1046
1047 /*
1048 * ISO 14443 contactless smart card messages.
1049 */
1050 #define LINKTYPE_ISO_14443 264
1051
1052 /*
1053 * Radio data system (RDS) groups. IEC 62106.
1054 * Per Jonathan Brucker <jonathan.brucke@gmail.com>.
1055 */
1056 #define LINKTYPE_RDS 265
1057
1058 /*
1059 * USB packets, beginning with a Darwin (macOS, etc.) header.
1060 */
1061 #define LINKTYPE_USB_DARWIN 266
1062
1063 /*
1064 * OpenBSD DLT_OPENFLOW.
1065 */
1066 #define LINKTYPE_OPENFLOW 267
1067
1068 /*
1069 * SDLC frames containing SNA PDUs.
1070 */
1071 #define LINKTYPE_SDLC 268
1072
1073 /*
1074 * per "Selvig, Bjorn" <b.selvig@ti.com> used for
1075 * TI protocol sniffer.
1076 */
1077 #define LINKTYPE_TI_LLN_SNIFFER 269
1078
1079 /*
1080 * per: Erik de Jong <erikdejong at gmail.com> for
1081 * https://github.com/eriknl/LoRaTap/releases/tag/v0.1
1082 */
1083 #define LINKTYPE_LORATAP 270
1084
1085 /*
1086 * per: Stefanha at gmail.com for
1087 * https://lists.sandelman.ca/pipermail/tcpdump-workers/2017-May/000772.html
1088 * and: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/uapi/linux/vsockmon.h
1089 * for: https://qemu-project.org/Features/VirtioVsock
1090 */
1091 #define LINKTYPE_VSOCK 271
1092
1093 /*
1094 * Nordic Semiconductor Bluetooth LE sniffer.
1095 */
1096 #define LINKTYPE_NORDIC_BLE 272
1097
1098 /*
1099 * Excentis DOCSIS 3.1 RF sniffer (XRA-31)
1100 * per: bruno.verstuyft at excentis.com
1101 * https://www.xra31.com/xra-header
1102 */
1103 #define LINKTYPE_DOCSIS31_XRA31 273
1104
1105 /*
1106 * mPackets, as specified by IEEE 802.3br Figure 99-4, starting
1107 * with the preamble and always ending with a CRC field.
1108 */
1109 #define LINKTYPE_ETHERNET_MPACKET 274
1110
1111 /*
1112 * DisplayPort AUX channel monitoring data as specified by VESA
1113 * DisplayPort(DP) Standard preceded by a pseudo-header.
1114 * per dirk.eibach at gdsys.cc
1115 */
1116 #define LINKTYPE_DISPLAYPORT_AUX 275
1117
1118 /*
1119 * Linux cooked sockets v2.
1120 */
1121 #define LINKTYPE_LINUX_SLL2 276
1122
1123 /*
1124 * Sercos Monitor, per Manuel Jacob <manuel.jacob at steinbeis-stg.de>
1125 */
1126 #define LINKTYPE_SERCOS_MONITOR 277
1127
1128 /*
1129 * OpenVizsla http://openvizsla.org is open source USB analyzer hardware.
1130 * It consists of FPGA with attached USB phy and FTDI chip for streaming
1131 * the data to the host PC.
1132 *
1133 * Current OpenVizsla data encapsulation format is described here:
1134 * https://github.com/matwey/libopenvizsla/wiki/OpenVizsla-protocol-description
1135 *
1136 */
1137 #define LINKTYPE_OPENVIZSLA 278
1138
1139 /*
1140 * The Elektrobit High Speed Capture and Replay (EBHSCR) protocol is produced
1141 * by a PCIe Card for interfacing high speed automotive interfaces.
1142 *
1143 * The specification for this frame format can be found at:
1144 * https://www.elektrobit.com/ebhscr
1145 *
1146 * for Guenter.Ebermann at elektrobit.com
1147 *
1148 */
1149 #define LINKTYPE_EBHSCR 279
1150
1151 /*
1152 * The https://fd.io vpp graph dispatch tracer produces pcap trace files
1153 * in the format documented here:
1154 * https://fdio-vpp.readthedocs.io/en/latest/gettingstarted/developers/vnet.html#graph-dispatcher-pcap-tracing
1155 */
1156 #define LINKTYPE_VPP_DISPATCH 280
1157
1158 /*
1159 * Broadcom Ethernet switches (ROBO switch) 4 bytes proprietary tagging format.
1160 */
1161 #define LINKTYPE_DSA_TAG_BRCM 281
1162 #define LINKTYPE_DSA_TAG_BRCM_PREPEND 282
1163
1164 /*
1165 * IEEE 802.15.4 with pseudo-header and optional meta-data TLVs, PHY payload
1166 * exactly as it appears in the spec (no padding, no nothing), and FCS if
1167 * specified by FCS Type TLV; requested by James Ko <jck@exegin.com>.
1168 * Specification at https://github.com/jkcko/ieee802.15.4-tap
1169 */
1170 #define LINKTYPE_IEEE802_15_4_TAP 283
1171
1172 /*
1173 * Marvell (Ethertype) Distributed Switch Architecture proprietary tagging format.
1174 */
1175 #define LINKTYPE_DSA_TAG_DSA 284
1176 #define LINKTYPE_DSA_TAG_EDSA 285
1177
1178 /*
1179 * Payload of lawful intercept packets using the ELEE protocol;
1180 * https://socket.hr/draft-dfranusic-opsawg-elee-00.xml
1181 * https://xml2rfc.tools.ietf.org/cgi-bin/xml2rfc.cgi?url=https://socket.hr/draft-dfranusic-opsawg-elee-00.xml&modeAsFormat=html/ascii
1182 */
1183 #define LINKTYPE_ELEE 286
1184
1185 /*
1186 * Serial frames transmitted between a host and a Z-Wave chip.
1187 */
1188 #define LINKTYPE_Z_WAVE_SERIAL 287
1189
1190 /*
1191 * USB 2.0, 1.1, and 1.0 packets as transmitted over the cable.
1192 */
1193 #define LINKTYPE_USB_2_0 288
1194
1195 /*
1196 * ATSC Link-Layer Protocol (A/330) packets.
1197 */
1198 #define LINKTYPE_ATSC_ALP 289
1199
1200 #define LINKTYPE_MATCHING_MAX 289 /* highest value in the "matching" range */
1201
1202 /*
1203 * The DLT_ and LINKTYPE_ values in the "matching" range should be the
1204 * same, so DLT_MATCHING_MAX and LINKTYPE_MATCHING_MAX should be the
1205 * same.
1206 */
1207 #if LINKTYPE_MATCHING_MAX != DLT_MATCHING_MAX
1208 #error The LINKTYPE_ matching range does not match the DLT_ matching range
1209 #endif
1210
1211 static struct linktype_map {
1212 int dlt;
1213 int linktype;
1214 } map[] = {
1215 /*
1216 * These DLT_* codes have LINKTYPE_* codes with values identical
1217 * to the values of the corresponding DLT_* code.
1218 */
1219 { DLT_NULL, LINKTYPE_NULL },
1220 { DLT_EN10MB, LINKTYPE_ETHERNET },
1221 { DLT_EN3MB, LINKTYPE_EXP_ETHERNET },
1222 { DLT_AX25, LINKTYPE_AX25 },
1223 { DLT_PRONET, LINKTYPE_PRONET },
1224 { DLT_CHAOS, LINKTYPE_CHAOS },
1225 { DLT_IEEE802, LINKTYPE_IEEE802_5 },
1226 { DLT_ARCNET, LINKTYPE_ARCNET_BSD },
1227 { DLT_SLIP, LINKTYPE_SLIP },
1228 { DLT_PPP, LINKTYPE_PPP },
1229 { DLT_FDDI, LINKTYPE_FDDI },
1230 { DLT_SYMANTEC_FIREWALL, LINKTYPE_SYMANTEC_FIREWALL },
1231
1232 /*
1233 * These DLT_* codes have different values on different
1234 * platforms; we map them to LINKTYPE_* codes that
1235 * have values that should never be equal to any DLT_*
1236 * code.
1237 */
1238 #ifdef DLT_FR
1239 /* BSD/OS Frame Relay */
1240 { DLT_FR, LINKTYPE_FRELAY },
1241 #endif
1242
1243 { DLT_ATM_RFC1483, LINKTYPE_ATM_RFC1483 },
1244 { DLT_RAW, LINKTYPE_RAW },
1245 { DLT_SLIP_BSDOS, LINKTYPE_SLIP_BSDOS },
1246 { DLT_PPP_BSDOS, LINKTYPE_PPP_BSDOS },
1247 { DLT_HDLC, LINKTYPE_NETBSD_HDLC },
1248
1249 /* BSD/OS Cisco HDLC */
1250 { DLT_C_HDLC, LINKTYPE_C_HDLC },
1251
1252 /*
1253 * These DLT_* codes are not on all platforms, but, so far,
1254 * there don't appear to be any platforms that define
1255 * other codes with those values; we map them to
1256 * different LINKTYPE_* values anyway, just in case.
1257 */
1258
1259 /* Linux ATM Classical IP */
1260 { DLT_ATM_CLIP, LINKTYPE_ATM_CLIP },
1261
1262 /* NetBSD sync/async serial PPP (or Cisco HDLC) */
1263 { DLT_PPP_SERIAL, LINKTYPE_PPP_HDLC },
1264
1265 /* NetBSD PPP over Ethernet */
1266 { DLT_PPP_ETHER, LINKTYPE_PPP_ETHER },
1267
1268 /*
1269 * All LINKTYPE_ values between LINKTYPE_MATCHING_MIN
1270 * and LINKTYPE_MATCHING_MAX are mapped to identical
1271 * DLT_ values.
1272 */
1273
1274 { -1, -1 }
1275 };
1276
1277 int
dlt_to_linktype(int dlt)1278 dlt_to_linktype(int dlt)
1279 {
1280 int i;
1281
1282 /*
1283 * DLTs that, on some platforms, have values in the matching range
1284 * but that *don't* have the same value as the corresponding
1285 * LINKTYPE because, for some reason, not all OSes have the
1286 * same value for that DLT (note that the DLT's value might be
1287 * outside the matching range on some of those OSes).
1288 */
1289 if (dlt == DLT_PFSYNC)
1290 return (LINKTYPE_PFSYNC);
1291 if (dlt == DLT_PKTAP)
1292 return (LINKTYPE_PKTAP);
1293
1294 /*
1295 * For all other values in the matching range, the DLT
1296 * value is the same as the LINKTYPE value.
1297 */
1298 if (dlt >= DLT_MATCHING_MIN && dlt <= DLT_MATCHING_MAX)
1299 return (dlt);
1300
1301 /*
1302 * Map the values outside that range.
1303 */
1304 for (i = 0; map[i].dlt != -1; i++) {
1305 if (map[i].dlt == dlt)
1306 return (map[i].linktype);
1307 }
1308
1309 /*
1310 * If we don't have a mapping for this DLT, return an
1311 * error; that means that this is a value with no corresponding
1312 * LINKTYPE, and we need to assign one.
1313 */
1314 return (-1);
1315 }
1316
1317 int
linktype_to_dlt(int linktype)1318 linktype_to_dlt(int linktype)
1319 {
1320 int i;
1321
1322 /*
1323 * LINKTYPEs in the matching range that *don't*
1324 * have the same value as the corresponding DLTs
1325 * because, for some reason, not all OSes have the
1326 * same value for that DLT.
1327 */
1328 if (linktype == LINKTYPE_PFSYNC)
1329 return (DLT_PFSYNC);
1330 if (linktype == LINKTYPE_PKTAP)
1331 return (DLT_PKTAP);
1332
1333 /*
1334 * For all other values in the matching range, except for
1335 * LINKTYPE_ATM_CLIP, the LINKTYPE value is the same as
1336 * the DLT value.
1337 *
1338 * LINKTYPE_ATM_CLIP is a special case. DLT_ATM_CLIP is
1339 * not on all platforms, but, so far, there don't appear
1340 * to be any platforms that define it as anything other
1341 * than 19; we define LINKTYPE_ATM_CLIP as something
1342 * other than 19, just in case. That value is in the
1343 * matching range, so we have to check for it.
1344 */
1345 if (linktype >= LINKTYPE_MATCHING_MIN &&
1346 linktype <= LINKTYPE_MATCHING_MAX &&
1347 linktype != LINKTYPE_ATM_CLIP)
1348 return (linktype);
1349
1350 /*
1351 * Map the values outside that range.
1352 */
1353 for (i = 0; map[i].linktype != -1; i++) {
1354 if (map[i].linktype == linktype)
1355 return (map[i].dlt);
1356 }
1357
1358 /*
1359 * If we don't have an entry for this LINKTYPE, return
1360 * the link type value; it may be a DLT from an newer
1361 * version of libpcap.
1362 */
1363 return linktype;
1364 }
1365
1366 /*
1367 * Return the maximum snapshot length for a given DLT_ value.
1368 *
1369 * For most link-layer types, we use MAXIMUM_SNAPLEN.
1370 *
1371 * For DLT_DBUS, the maximum is 128MiB, as per
1372 *
1373 * https://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-messages
1374 *
1375 * For DLT_EBHSCR, the maximum is 8MiB, as per
1376 *
1377 * https://www.elektrobit.com/ebhscr
1378 *
1379 * For DLT_USBPCAP, the maximum is 1MiB, as per
1380 *
1381 * https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=15985
1382 */
1383 u_int
max_snaplen_for_dlt(int dlt)1384 max_snaplen_for_dlt(int dlt)
1385 {
1386 switch (dlt) {
1387
1388 case DLT_DBUS:
1389 return 128*1024*1024;
1390
1391 case DLT_EBHSCR:
1392 return 8*1024*1024;
1393
1394 case DLT_USBPCAP:
1395 return 1024*1024;
1396
1397 default:
1398 return MAXIMUM_SNAPLEN;
1399 }
1400 }
1401