xref: /freebsd/contrib/libpcap/pcap/dlt.h (revision 13ea0450a9c8742119d36f3bf8f47accdce46e54)
1 /*-
2  * Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
3  *	The Regents of the University of California.  All rights reserved.
4  *
5  * This code is derived from the Stanford/CMU enet packet filter,
6  * (net/enet.c) distributed as part of 4.3BSD, and code contributed
7  * to Berkeley by Steven McCanne and Van Jacobson both of Lawrence
8  * Berkeley Laboratory.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  * 3. Neither the name of the University nor the names of its contributors
19  *    may be used to endorse or promote products derived from this software
20  *    without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32  * SUCH DAMAGE.
33  *
34  *      @(#)bpf.h       7.1 (Berkeley) 5/7/91
35  */
36 
37 #ifndef lib_pcap_dlt_h
38 #define lib_pcap_dlt_h
39 
40 /*
41  * Link-layer header type codes.
42  *
43  * Do *NOT* add new values to this list without asking
44  * "tcpdump-workers@lists.tcpdump.org" for a value.  Otherwise, you run
45  * the risk of using a value that's already being used for some other
46  * purpose, and of having tools that read libpcap-format captures not
47  * being able to handle captures with your new DLT_ value, with no hope
48  * that they will ever be changed to do so (as that would destroy their
49  * ability to read captures using that value for that other purpose).
50  *
51  * See
52  *
53  *	http://www.tcpdump.org/linktypes.html
54  *
55  * for detailed descriptions of some of these link-layer header types.
56  */
57 
58 /*
59  * These are the types that are the same on all platforms, and that
60  * have been defined by <net/bpf.h> for ages.
61  */
62 #define DLT_NULL	0	/* BSD loopback encapsulation */
63 #define DLT_EN10MB	1	/* Ethernet (10Mb) */
64 #define DLT_EN3MB	2	/* Experimental Ethernet (3Mb) */
65 #define DLT_AX25	3	/* Amateur Radio AX.25 */
66 #define DLT_PRONET	4	/* Proteon ProNET Token Ring */
67 #define DLT_CHAOS	5	/* Chaos */
68 #define DLT_IEEE802	6	/* 802.5 Token Ring */
69 #define DLT_ARCNET	7	/* ARCNET, with BSD-style header */
70 #define DLT_SLIP	8	/* Serial Line IP */
71 #define DLT_PPP		9	/* Point-to-point Protocol */
72 #define DLT_FDDI	10	/* FDDI */
73 
74 /*
75  * These are types that are different on some platforms, and that
76  * have been defined by <net/bpf.h> for ages.  We use #ifdefs to
77  * detect the BSDs that define them differently from the traditional
78  * libpcap <net/bpf.h>
79  *
80  * XXX - DLT_ATM_RFC1483 is 13 in BSD/OS, and DLT_RAW is 14 in BSD/OS,
81  * but I don't know what the right #define is for BSD/OS.
82  */
83 #define DLT_ATM_RFC1483	11	/* LLC-encapsulated ATM */
84 
85 #ifdef __OpenBSD__
86 #define DLT_RAW		14	/* raw IP */
87 #else
88 #define DLT_RAW		12	/* raw IP */
89 #endif
90 
91 /*
92  * Given that the only OS that currently generates BSD/OS SLIP or PPP
93  * is, well, BSD/OS, arguably everybody should have chosen its values
94  * for DLT_SLIP_BSDOS and DLT_PPP_BSDOS, which are 15 and 16, but they
95  * didn't.  So it goes.
96  */
97 #if defined(__NetBSD__) || defined(__FreeBSD__)
98 #ifndef DLT_SLIP_BSDOS
99 #define DLT_SLIP_BSDOS	13	/* BSD/OS Serial Line IP */
100 #define DLT_PPP_BSDOS	14	/* BSD/OS Point-to-point Protocol */
101 #endif
102 #else
103 #define DLT_SLIP_BSDOS	15	/* BSD/OS Serial Line IP */
104 #define DLT_PPP_BSDOS	16	/* BSD/OS Point-to-point Protocol */
105 #endif
106 
107 /*
108  * 17 was used for DLT_PFLOG in OpenBSD; it no longer is.
109  *
110  * It was DLT_LANE8023 in SuSE 6.3, so we defined LINKTYPE_PFLOG
111  * as 117 so that pflog captures would use a link-layer header type
112  * value that didn't collide with any other values.  On all
113  * platforms other than OpenBSD, we defined DLT_PFLOG as 117,
114  * and we mapped between LINKTYPE_PFLOG and DLT_PFLOG.
115  *
116  * OpenBSD eventually switched to using 117 for DLT_PFLOG as well.
117  *
118  * Don't use 17 for anything else.
119  */
120 
121 /*
122  * 18 is used for DLT_PFSYNC in OpenBSD, NetBSD, DragonFly BSD and
123  * macOS; don't use it for anything else.  (FreeBSD uses 121, which
124  * collides with DLT_HHDLC, even though it doesn't use 18 for
125  * anything and doesn't appear to have ever used it for anything.)
126  *
127  * We define it as 18 on those platforms; it is, unfortunately, used
128  * for DLT_CIP in Suse 6.3, so we don't define it as DLT_PFSYNC
129  * in general.  As the packet format for it, like that for
130  * DLT_PFLOG, is not only OS-dependent but OS-version-dependent,
131  * we don't support printing it in tcpdump except on OSes that
132  * have the relevant header files, so it's not that useful on
133  * other platforms.
134  */
135 #if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__DragonFly__) || defined(__APPLE__)
136 #define DLT_PFSYNC	18
137 #endif
138 
139 #define DLT_ATM_CLIP	19	/* Linux Classical-IP over ATM */
140 
141 /*
142  * Apparently Redback uses this for its SmartEdge 400/800.  I hope
143  * nobody else decided to use it, too.
144  */
145 #define DLT_REDBACK_SMARTEDGE	32
146 
147 /*
148  * These values are defined by NetBSD; other platforms should refrain from
149  * using them for other purposes, so that NetBSD savefiles with link
150  * types of 50 or 51 can be read as this type on all platforms.
151  */
152 #define DLT_PPP_SERIAL	50	/* PPP over serial with HDLC encapsulation */
153 #define DLT_PPP_ETHER	51	/* PPP over Ethernet */
154 
155 /*
156  * The Axent Raptor firewall - now the Symantec Enterprise Firewall - uses
157  * a link-layer type of 99 for the tcpdump it supplies.  The link-layer
158  * header has 6 bytes of unknown data, something that appears to be an
159  * Ethernet type, and 36 bytes that appear to be 0 in at least one capture
160  * I've seen.
161  */
162 #define DLT_SYMANTEC_FIREWALL	99
163 
164 /*
165  * Values between 100 and 103 are used in capture file headers as
166  * link-layer header type LINKTYPE_ values corresponding to DLT_ types
167  * that differ between platforms; don't use those values for new DLT_
168  * new types.
169  */
170 
171 /*
172  * Values starting with 104 are used for newly-assigned link-layer
173  * header type values; for those link-layer header types, the DLT_
174  * value returned by pcap_datalink() and passed to pcap_open_dead(),
175  * and the LINKTYPE_ value that appears in capture files, are the
176  * same.
177  *
178  * DLT_MATCHING_MIN is the lowest such value; DLT_MATCHING_MAX is
179  * the highest such value.
180  */
181 #define DLT_MATCHING_MIN	104
182 
183 /*
184  * This value was defined by libpcap 0.5; platforms that have defined
185  * it with a different value should define it here with that value -
186  * a link type of 104 in a save file will be mapped to DLT_C_HDLC,
187  * whatever value that happens to be, so programs will correctly
188  * handle files with that link type regardless of the value of
189  * DLT_C_HDLC.
190  *
191  * The name DLT_C_HDLC was used by BSD/OS; we use that name for source
192  * compatibility with programs written for BSD/OS.
193  *
194  * libpcap 0.5 defined it as DLT_CHDLC; we define DLT_CHDLC as well,
195  * for source compatibility with programs written for libpcap 0.5.
196  */
197 #define DLT_C_HDLC	104	/* Cisco HDLC */
198 #define DLT_CHDLC	DLT_C_HDLC
199 
200 #define DLT_IEEE802_11	105	/* IEEE 802.11 wireless */
201 
202 /*
203  * 106 is reserved for Linux Classical IP over ATM; it's like DLT_RAW,
204  * except when it isn't.  (I.e., sometimes it's just raw IP, and
205  * sometimes it isn't.)  We currently handle it as DLT_LINUX_SLL,
206  * so that we don't have to worry about the link-layer header.)
207  */
208 
209 /*
210  * Frame Relay; BSD/OS has a DLT_FR with a value of 11, but that collides
211  * with other values.
212  * DLT_FR and DLT_FRELAY packets start with the Q.922 Frame Relay header
213  * (DLCI, etc.).
214  */
215 #define DLT_FRELAY	107
216 
217 /*
218  * OpenBSD DLT_LOOP, for loopback devices; it's like DLT_NULL, except
219  * that the AF_ type in the link-layer header is in network byte order.
220  *
221  * DLT_LOOP is 12 in OpenBSD, but that's DLT_RAW in other OSes, so
222  * we don't use 12 for it in OSes other than OpenBSD.
223  */
224 #ifdef __OpenBSD__
225 #define DLT_LOOP	12
226 #else
227 #define DLT_LOOP	108
228 #endif
229 
230 /*
231  * Encapsulated packets for IPsec; DLT_ENC is 13 in OpenBSD, but that's
232  * DLT_SLIP_BSDOS in NetBSD, so we don't use 13 for it in OSes other
233  * than OpenBSD.
234  */
235 #ifdef __OpenBSD__
236 #define DLT_ENC		13
237 #else
238 #define DLT_ENC		109
239 #endif
240 
241 /*
242  * Values between 110 and 112 are reserved for use in capture file headers
243  * as link-layer types corresponding to DLT_ types that might differ
244  * between platforms; don't use those values for new DLT_ types
245  * other than the corresponding DLT_ types.
246  */
247 
248 /*
249  * This is for Linux cooked sockets.
250  */
251 #define DLT_LINUX_SLL	113
252 
253 /*
254  * Apple LocalTalk hardware.
255  */
256 #define DLT_LTALK	114
257 
258 /*
259  * Acorn Econet.
260  */
261 #define DLT_ECONET	115
262 
263 /*
264  * Reserved for use with OpenBSD ipfilter.
265  */
266 #define DLT_IPFILTER	116
267 
268 /*
269  * OpenBSD DLT_PFLOG.
270  */
271 #define DLT_PFLOG	117
272 
273 /*
274  * Registered for Cisco-internal use.
275  */
276 #define DLT_CISCO_IOS	118
277 
278 /*
279  * For 802.11 cards using the Prism II chips, with a link-layer
280  * header including Prism monitor mode information plus an 802.11
281  * header.
282  */
283 #define DLT_PRISM_HEADER	119
284 
285 /*
286  * Reserved for Aironet 802.11 cards, with an Aironet link-layer header
287  * (see Doug Ambrisko's FreeBSD patches).
288  */
289 #define DLT_AIRONET_HEADER	120
290 
291 /*
292  * Sigh.
293  *
294  * 121 was reserved for Siemens HiPath HDLC on 2002-01-25, as
295  * requested by Tomas Kukosa.
296  *
297  * On 2004-02-25, a FreeBSD checkin to sys/net/bpf.h was made that
298  * assigned 121 as DLT_PFSYNC.  In current versions, its libpcap
299  * does DLT_ <-> LINKTYPE_ mapping, mapping DLT_PFSYNC to a
300  * LINKTYPE_PFSYNC value of 246, so it should write out DLT_PFSYNC
301  * dump files with 246 as the link-layer header type.  (Earlier
302  * versions might not have done mapping, in which case they would
303  * have written them out with a link-layer header type of 121.)
304  *
305  * OpenBSD, from which pf came, however, uses 18 for DLT_PFSYNC;
306  * its libpcap does no DLT_ <-> LINKTYPE_ mapping, so it would
307  * write out DLT_PFSYNC dump files with use 18 as the link-layer
308  * header type.
309  *
310  * NetBSD, DragonFly BSD, and Darwin also use 18 for DLT_PFSYNC; in
311  * current versions, their libpcaps do DLT_ <-> LINKTYPE_ mapping,
312  * mapping DLT_PFSYNC to a LINKTYPE_PFSYNC value of 246, so they
313  * should write out DLT_PFSYNC dump files with 246 as the link-layer
314  * header type.  (Earlier versions might not have done mapping,
315  * in which case they'd work the same way OpenBSD does, writing
316  * them out with a link-layer header type of 18.)
317  *
318  * We'll define DLT_PFSYNC as:
319  *
320  *    18 on NetBSD, OpenBSD, DragonFly BSD, and Darwin;
321  *
322  *    121 on FreeBSD;
323  *
324  *    246 everywhere else.
325  *
326  * We'll define DLT_HHDLC as 121 on everything except for FreeBSD;
327  * anybody who wants to compile, on FreeBSD, code that uses DLT_HHDLC
328  * is out of luck.
329  *
330  * We'll define LINKTYPE_PFSYNC as 246 on *all* platforms, so that
331  * savefiles written using *this* code won't use 18 or 121 for PFSYNC,
332  * they'll all use 246.
333  *
334  * Code that uses pcap_datalink() to determine the link-layer header
335  * type of a savefile won't, when built and run on FreeBSD, be able
336  * to distinguish between LINKTYPE_PFSYNC and LINKTYPE_HHDLC capture
337  * files, as pcap_datalink() will give 121 for both of them.  Code
338  * that doesn't, such as the code in Wireshark, will be able to
339  * distinguish between them.
340  *
341  * FreeBSD's libpcap won't map a link-layer header type of 18 - i.e.,
342  * DLT_PFSYNC files from OpenBSD and possibly older versions of NetBSD,
343  * DragonFly BSD, and macOS - to DLT_PFSYNC, so code built with FreeBSD's
344  * libpcap won't treat those files as DLT_PFSYNC files.
345  *
346  * Other libpcaps won't map a link-layer header type of 121 to DLT_PFSYNC;
347  * this means they can read DLT_HHDLC files, if any exist, but won't
348  * treat pcap files written by any older versions of FreeBSD libpcap that
349  * didn't map to 246 as DLT_PFSYNC files.
350  */
351 #ifdef __FreeBSD__
352 #define DLT_PFSYNC		121
353 #else
354 #define DLT_HHDLC		121
355 #endif
356 
357 /*
358  * This is for RFC 2625 IP-over-Fibre Channel.
359  *
360  * This is not for use with raw Fibre Channel, where the link-layer
361  * header starts with a Fibre Channel frame header; it's for IP-over-FC,
362  * where the link-layer header starts with an RFC 2625 Network_Header
363  * field.
364  */
365 #define DLT_IP_OVER_FC		122
366 
367 /*
368  * This is for Full Frontal ATM on Solaris with SunATM, with a
369  * pseudo-header followed by an AALn PDU.
370  *
371  * There may be other forms of Full Frontal ATM on other OSes,
372  * with different pseudo-headers.
373  *
374  * If ATM software returns a pseudo-header with VPI/VCI information
375  * (and, ideally, packet type information, e.g. signalling, ILMI,
376  * LANE, LLC-multiplexed traffic, etc.), it should not use
377  * DLT_ATM_RFC1483, but should get a new DLT_ value, so tcpdump
378  * and the like don't have to infer the presence or absence of a
379  * pseudo-header and the form of the pseudo-header.
380  */
381 #define DLT_SUNATM		123	/* Solaris+SunATM */
382 
383 /*
384  * Reserved as per request from Kent Dahlgren <kent@praesum.com>
385  * for private use.
386  */
387 #define DLT_RIO                 124     /* RapidIO */
388 #define DLT_PCI_EXP             125     /* PCI Express */
389 #define DLT_AURORA              126     /* Xilinx Aurora link layer */
390 
391 /*
392  * Header for 802.11 plus a number of bits of link-layer information
393  * including radio information, used by some recent BSD drivers as
394  * well as the madwifi Atheros driver for Linux.
395  */
396 #define DLT_IEEE802_11_RADIO	127	/* 802.11 plus radiotap radio header */
397 
398 /*
399  * Reserved for the TZSP encapsulation, as per request from
400  * Chris Waters <chris.waters@networkchemistry.com>
401  * TZSP is a generic encapsulation for any other link type,
402  * which includes a means to include meta-information
403  * with the packet, e.g. signal strength and channel
404  * for 802.11 packets.
405  */
406 #define DLT_TZSP                128     /* Tazmen Sniffer Protocol */
407 
408 /*
409  * BSD's ARCNET headers have the source host, destination host,
410  * and type at the beginning of the packet; that's what's handed
411  * up to userland via BPF.
412  *
413  * Linux's ARCNET headers, however, have a 2-byte offset field
414  * between the host IDs and the type; that's what's handed up
415  * to userland via PF_PACKET sockets.
416  *
417  * We therefore have to have separate DLT_ values for them.
418  */
419 #define DLT_ARCNET_LINUX	129	/* ARCNET */
420 
421 /*
422  * Juniper-private data link types, as per request from
423  * Hannes Gredler <hannes@juniper.net>.  The DLT_s are used
424  * for passing on chassis-internal metainformation such as
425  * QOS profiles, etc..
426  */
427 #define DLT_JUNIPER_MLPPP       130
428 #define DLT_JUNIPER_MLFR        131
429 #define DLT_JUNIPER_ES          132
430 #define DLT_JUNIPER_GGSN        133
431 #define DLT_JUNIPER_MFR         134
432 #define DLT_JUNIPER_ATM2        135
433 #define DLT_JUNIPER_SERVICES    136
434 #define DLT_JUNIPER_ATM1        137
435 
436 /*
437  * Apple IP-over-IEEE 1394, as per a request from Dieter Siegmund
438  * <dieter@apple.com>.  The header that's presented is an Ethernet-like
439  * header:
440  *
441  *	#define FIREWIRE_EUI64_LEN	8
442  *	struct firewire_header {
443  *		u_char  firewire_dhost[FIREWIRE_EUI64_LEN];
444  *		u_char  firewire_shost[FIREWIRE_EUI64_LEN];
445  *		u_short firewire_type;
446  *	};
447  *
448  * with "firewire_type" being an Ethernet type value, rather than,
449  * for example, raw GASP frames being handed up.
450  */
451 #define DLT_APPLE_IP_OVER_IEEE1394	138
452 
453 /*
454  * Various SS7 encapsulations, as per a request from Jeff Morriss
455  * <jeff.morriss[AT]ulticom.com> and subsequent discussions.
456  */
457 #define DLT_MTP2_WITH_PHDR	139	/* pseudo-header with various info, followed by MTP2 */
458 #define DLT_MTP2		140	/* MTP2, without pseudo-header */
459 #define DLT_MTP3		141	/* MTP3, without pseudo-header or MTP2 */
460 #define DLT_SCCP		142	/* SCCP, without pseudo-header or MTP2 or MTP3 */
461 
462 /*
463  * DOCSIS MAC frames.
464  */
465 #define DLT_DOCSIS		143
466 
467 /*
468  * Linux-IrDA packets. Protocol defined at http://www.irda.org.
469  * Those packets include IrLAP headers and above (IrLMP...), but
470  * don't include Phy framing (SOF/EOF/CRC & byte stuffing), because Phy
471  * framing can be handled by the hardware and depend on the bitrate.
472  * This is exactly the format you would get capturing on a Linux-IrDA
473  * interface (irdaX), but not on a raw serial port.
474  * Note the capture is done in "Linux-cooked" mode, so each packet include
475  * a fake packet header (struct sll_header). This is because IrDA packet
476  * decoding is dependant on the direction of the packet (incomming or
477  * outgoing).
478  * When/if other platform implement IrDA capture, we may revisit the
479  * issue and define a real DLT_IRDA...
480  * Jean II
481  */
482 #define DLT_LINUX_IRDA		144
483 
484 /*
485  * Reserved for IBM SP switch and IBM Next Federation switch.
486  */
487 #define DLT_IBM_SP		145
488 #define DLT_IBM_SN		146
489 
490 /*
491  * Reserved for private use.  If you have some link-layer header type
492  * that you want to use within your organization, with the capture files
493  * using that link-layer header type not ever be sent outside your
494  * organization, you can use these values.
495  *
496  * No libpcap release will use these for any purpose, nor will any
497  * tcpdump release use them, either.
498  *
499  * Do *NOT* use these in capture files that you expect anybody not using
500  * your private versions of capture-file-reading tools to read; in
501  * particular, do *NOT* use them in products, otherwise you may find that
502  * people won't be able to use tcpdump, or snort, or Ethereal, or... to
503  * read capture files from your firewall/intrusion detection/traffic
504  * monitoring/etc. appliance, or whatever product uses that DLT_ value,
505  * and you may also find that the developers of those applications will
506  * not accept patches to let them read those files.
507  *
508  * Also, do not use them if somebody might send you a capture using them
509  * for *their* private type and tools using them for *your* private type
510  * would have to read them.
511  *
512  * Instead, ask "tcpdump-workers@lists.tcpdump.org" for a new DLT_ value,
513  * as per the comment above, and use the type you're given.
514  */
515 #define DLT_USER0		147
516 #define DLT_USER1		148
517 #define DLT_USER2		149
518 #define DLT_USER3		150
519 #define DLT_USER4		151
520 #define DLT_USER5		152
521 #define DLT_USER6		153
522 #define DLT_USER7		154
523 #define DLT_USER8		155
524 #define DLT_USER9		156
525 #define DLT_USER10		157
526 #define DLT_USER11		158
527 #define DLT_USER12		159
528 #define DLT_USER13		160
529 #define DLT_USER14		161
530 #define DLT_USER15		162
531 
532 /*
533  * For future use with 802.11 captures - defined by AbsoluteValue
534  * Systems to store a number of bits of link-layer information
535  * including radio information:
536  *
537  *	http://www.shaftnet.org/~pizza/software/capturefrm.txt
538  *
539  * but it might be used by some non-AVS drivers now or in the
540  * future.
541  */
542 #define DLT_IEEE802_11_RADIO_AVS 163	/* 802.11 plus AVS radio header */
543 
544 /*
545  * Juniper-private data link type, as per request from
546  * Hannes Gredler <hannes@juniper.net>.  The DLT_s are used
547  * for passing on chassis-internal metainformation such as
548  * QOS profiles, etc..
549  */
550 #define DLT_JUNIPER_MONITOR     164
551 
552 /*
553  * BACnet MS/TP frames.
554  */
555 #define DLT_BACNET_MS_TP	165
556 
557 /*
558  * Another PPP variant as per request from Karsten Keil <kkeil@suse.de>.
559  *
560  * This is used in some OSes to allow a kernel socket filter to distinguish
561  * between incoming and outgoing packets, on a socket intended to
562  * supply pppd with outgoing packets so it can do dial-on-demand and
563  * hangup-on-lack-of-demand; incoming packets are filtered out so they
564  * don't cause pppd to hold the connection up (you don't want random
565  * input packets such as port scans, packets from old lost connections,
566  * etc. to force the connection to stay up).
567  *
568  * The first byte of the PPP header (0xff03) is modified to accomodate
569  * the direction - 0x00 = IN, 0x01 = OUT.
570  */
571 #define DLT_PPP_PPPD		166
572 
573 /*
574  * Names for backwards compatibility with older versions of some PPP
575  * software; new software should use DLT_PPP_PPPD.
576  */
577 #define DLT_PPP_WITH_DIRECTION	DLT_PPP_PPPD
578 #define DLT_LINUX_PPP_WITHDIRECTION	DLT_PPP_PPPD
579 
580 /*
581  * Juniper-private data link type, as per request from
582  * Hannes Gredler <hannes@juniper.net>.  The DLT_s are used
583  * for passing on chassis-internal metainformation such as
584  * QOS profiles, cookies, etc..
585  */
586 #define DLT_JUNIPER_PPPOE       167
587 #define DLT_JUNIPER_PPPOE_ATM   168
588 
589 #define DLT_GPRS_LLC		169	/* GPRS LLC */
590 #define DLT_GPF_T		170	/* GPF-T (ITU-T G.7041/Y.1303) */
591 #define DLT_GPF_F		171	/* GPF-F (ITU-T G.7041/Y.1303) */
592 
593 /*
594  * Requested by Oolan Zimmer <oz@gcom.com> for use in Gcom's T1/E1 line
595  * monitoring equipment.
596  */
597 #define DLT_GCOM_T1E1		172
598 #define DLT_GCOM_SERIAL		173
599 
600 /*
601  * Juniper-private data link type, as per request from
602  * Hannes Gredler <hannes@juniper.net>.  The DLT_ is used
603  * for internal communication to Physical Interface Cards (PIC)
604  */
605 #define DLT_JUNIPER_PIC_PEER    174
606 
607 /*
608  * Link types requested by Gregor Maier <gregor@endace.com> of Endace
609  * Measurement Systems.  They add an ERF header (see
610  * http://www.endace.com/support/EndaceRecordFormat.pdf) in front of
611  * the link-layer header.
612  */
613 #define DLT_ERF_ETH		175	/* Ethernet */
614 #define DLT_ERF_POS		176	/* Packet-over-SONET */
615 
616 /*
617  * Requested by Daniele Orlandi <daniele@orlandi.com> for raw LAPD
618  * for vISDN (http://www.orlandi.com/visdn/).  Its link-layer header
619  * includes additional information before the LAPD header, so it's
620  * not necessarily a generic LAPD header.
621  */
622 #define DLT_LINUX_LAPD		177
623 
624 /*
625  * Juniper-private data link type, as per request from
626  * Hannes Gredler <hannes@juniper.net>.
627  * The DLT_ are used for prepending meta-information
628  * like interface index, interface name
629  * before standard Ethernet, PPP, Frelay & C-HDLC Frames
630  */
631 #define DLT_JUNIPER_ETHER       178
632 #define DLT_JUNIPER_PPP         179
633 #define DLT_JUNIPER_FRELAY      180
634 #define DLT_JUNIPER_CHDLC       181
635 
636 /*
637  * Multi Link Frame Relay (FRF.16)
638  */
639 #define DLT_MFR                 182
640 
641 /*
642  * Juniper-private data link type, as per request from
643  * Hannes Gredler <hannes@juniper.net>.
644  * The DLT_ is used for internal communication with a
645  * voice Adapter Card (PIC)
646  */
647 #define DLT_JUNIPER_VP          183
648 
649 /*
650  * Arinc 429 frames.
651  * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>.
652  * Every frame contains a 32bit A429 label.
653  * More documentation on Arinc 429 can be found at
654  * http://www.condoreng.com/support/downloads/tutorials/ARINCTutorial.pdf
655  */
656 #define DLT_A429                184
657 
658 /*
659  * Arinc 653 Interpartition Communication messages.
660  * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>.
661  * Please refer to the A653-1 standard for more information.
662  */
663 #define DLT_A653_ICM            185
664 
665 /*
666  * This used to be "USB packets, beginning with a USB setup header;
667  * requested by Paolo Abeni <paolo.abeni@email.it>."
668  *
669  * However, that header didn't work all that well - it left out some
670  * useful information - and was abandoned in favor of the DLT_USB_LINUX
671  * header.
672  *
673  * This is now used by FreeBSD for its BPF taps for USB; that has its
674  * own headers.  So it is written, so it is done.
675  *
676  * For source-code compatibility, we also define DLT_USB to have this
677  * value.  We do it numerically so that, if code that includes this
678  * file (directly or indirectly) also includes an OS header that also
679  * defines DLT_USB as 186, we don't get a redefinition warning.
680  * (NetBSD 7 does that.)
681  */
682 #define DLT_USB_FREEBSD		186
683 #define DLT_USB			186
684 
685 /*
686  * Bluetooth HCI UART transport layer (part H:4); requested by
687  * Paolo Abeni.
688  */
689 #define DLT_BLUETOOTH_HCI_H4	187
690 
691 /*
692  * IEEE 802.16 MAC Common Part Sublayer; requested by Maria Cruz
693  * <cruz_petagay@bah.com>.
694  */
695 #define DLT_IEEE802_16_MAC_CPS	188
696 
697 /*
698  * USB packets, beginning with a Linux USB header; requested by
699  * Paolo Abeni <paolo.abeni@email.it>.
700  */
701 #define DLT_USB_LINUX		189
702 
703 /*
704  * Controller Area Network (CAN) v. 2.0B packets.
705  * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>.
706  * Used to dump CAN packets coming from a CAN Vector board.
707  * More documentation on the CAN v2.0B frames can be found at
708  * http://www.can-cia.org/downloads/?269
709  */
710 #define DLT_CAN20B              190
711 
712 /*
713  * IEEE 802.15.4, with address fields padded, as is done by Linux
714  * drivers; requested by Juergen Schimmer.
715  */
716 #define DLT_IEEE802_15_4_LINUX	191
717 
718 /*
719  * Per Packet Information encapsulated packets.
720  * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>.
721  */
722 #define DLT_PPI			192
723 
724 /*
725  * Header for 802.16 MAC Common Part Sublayer plus a radiotap radio header;
726  * requested by Charles Clancy.
727  */
728 #define DLT_IEEE802_16_MAC_CPS_RADIO	193
729 
730 /*
731  * Juniper-private data link type, as per request from
732  * Hannes Gredler <hannes@juniper.net>.
733  * The DLT_ is used for internal communication with a
734  * integrated service module (ISM).
735  */
736 #define DLT_JUNIPER_ISM         194
737 
738 /*
739  * IEEE 802.15.4, exactly as it appears in the spec (no padding, no
740  * nothing); requested by Mikko Saarnivala <mikko.saarnivala@sensinode.com>.
741  * For this one, we expect the FCS to be present at the end of the frame;
742  * if the frame has no FCS, DLT_IEEE802_15_4_NOFCS should be used.
743  *
744  * We keep the name DLT_IEEE802_15_4 as an alias for backwards
745  * compatibility, but, again, this should *only* be used for 802.15.4
746  * frames that include the FCS.
747  */
748 #define DLT_IEEE802_15_4_WITHFCS	195
749 #define DLT_IEEE802_15_4		DLT_IEEE802_15_4_WITHFCS
750 
751 /*
752  * Various link-layer types, with a pseudo-header, for SITA
753  * (http://www.sita.aero/); requested by Fulko Hew (fulko.hew@gmail.com).
754  */
755 #define DLT_SITA		196
756 
757 /*
758  * Various link-layer types, with a pseudo-header, for Endace DAG cards;
759  * encapsulates Endace ERF records.  Requested by Stephen Donnelly
760  * <stephen@endace.com>.
761  */
762 #define DLT_ERF			197
763 
764 /*
765  * Special header prepended to Ethernet packets when capturing from a
766  * u10 Networks board.  Requested by Phil Mulholland
767  * <phil@u10networks.com>.
768  */
769 #define DLT_RAIF1		198
770 
771 /*
772  * IPMB packet for IPMI, beginning with the I2C slave address, followed
773  * by the netFn and LUN, etc..  Requested by Chanthy Toeung
774  * <chanthy.toeung@ca.kontron.com>.
775  */
776 #define DLT_IPMB		199
777 
778 /*
779  * Juniper-private data link type, as per request from
780  * Hannes Gredler <hannes@juniper.net>.
781  * The DLT_ is used for capturing data on a secure tunnel interface.
782  */
783 #define DLT_JUNIPER_ST          200
784 
785 /*
786  * Bluetooth HCI UART transport layer (part H:4), with pseudo-header
787  * that includes direction information; requested by Paolo Abeni.
788  */
789 #define DLT_BLUETOOTH_HCI_H4_WITH_PHDR	201
790 
791 /*
792  * AX.25 packet with a 1-byte KISS header; see
793  *
794  *	http://www.ax25.net/kiss.htm
795  *
796  * as per Richard Stearn <richard@rns-stearn.demon.co.uk>.
797  */
798 #define DLT_AX25_KISS		202
799 
800 /*
801  * LAPD packets from an ISDN channel, starting with the address field,
802  * with no pseudo-header.
803  * Requested by Varuna De Silva <varunax@gmail.com>.
804  */
805 #define DLT_LAPD		203
806 
807 /*
808  * Variants of various link-layer headers, with a one-byte direction
809  * pseudo-header prepended - zero means "received by this host",
810  * non-zero (any non-zero value) means "sent by this host" - as per
811  * Will Barker <w.barker@zen.co.uk>.
812  */
813 #define DLT_PPP_WITH_DIR	204	/* PPP - don't confuse with DLT_PPP_WITH_DIRECTION */
814 #define DLT_C_HDLC_WITH_DIR	205	/* Cisco HDLC */
815 #define DLT_FRELAY_WITH_DIR	206	/* Frame Relay */
816 #define DLT_LAPB_WITH_DIR	207	/* LAPB */
817 
818 /*
819  * 208 is reserved for an as-yet-unspecified proprietary link-layer
820  * type, as requested by Will Barker.
821  */
822 
823 /*
824  * IPMB with a Linux-specific pseudo-header; as requested by Alexey Neyman
825  * <avn@pigeonpoint.com>.
826  */
827 #define DLT_IPMB_LINUX		209
828 
829 /*
830  * FlexRay automotive bus - http://www.flexray.com/ - as requested
831  * by Hannes Kaelber <hannes.kaelber@x2e.de>.
832  */
833 #define DLT_FLEXRAY		210
834 
835 /*
836  * Media Oriented Systems Transport (MOST) bus for multimedia
837  * transport - http://www.mostcooperation.com/ - as requested
838  * by Hannes Kaelber <hannes.kaelber@x2e.de>.
839  */
840 #define DLT_MOST		211
841 
842 /*
843  * Local Interconnect Network (LIN) bus for vehicle networks -
844  * http://www.lin-subbus.org/ - as requested by Hannes Kaelber
845  * <hannes.kaelber@x2e.de>.
846  */
847 #define DLT_LIN			212
848 
849 /*
850  * X2E-private data link type used for serial line capture,
851  * as requested by Hannes Kaelber <hannes.kaelber@x2e.de>.
852  */
853 #define DLT_X2E_SERIAL		213
854 
855 /*
856  * X2E-private data link type used for the Xoraya data logger
857  * family, as requested by Hannes Kaelber <hannes.kaelber@x2e.de>.
858  */
859 #define DLT_X2E_XORAYA		214
860 
861 /*
862  * IEEE 802.15.4, exactly as it appears in the spec (no padding, no
863  * nothing), but with the PHY-level data for non-ASK PHYs (4 octets
864  * of 0 as preamble, one octet of SFD, one octet of frame length+
865  * reserved bit, and then the MAC-layer data, starting with the
866  * frame control field).
867  *
868  * Requested by Max Filippov <jcmvbkbc@gmail.com>.
869  */
870 #define DLT_IEEE802_15_4_NONASK_PHY	215
871 
872 /*
873  * David Gibson <david@gibson.dropbear.id.au> requested this for
874  * captures from the Linux kernel /dev/input/eventN devices. This
875  * is used to communicate keystrokes and mouse movements from the
876  * Linux kernel to display systems, such as Xorg.
877  */
878 #define DLT_LINUX_EVDEV		216
879 
880 /*
881  * GSM Um and Abis interfaces, preceded by a "gsmtap" header.
882  *
883  * Requested by Harald Welte <laforge@gnumonks.org>.
884  */
885 #define DLT_GSMTAP_UM		217
886 #define DLT_GSMTAP_ABIS		218
887 
888 /*
889  * MPLS, with an MPLS label as the link-layer header.
890  * Requested by Michele Marchetto <michele@openbsd.org> on behalf
891  * of OpenBSD.
892  */
893 #define DLT_MPLS		219
894 
895 /*
896  * USB packets, beginning with a Linux USB header, with the USB header
897  * padded to 64 bytes; required for memory-mapped access.
898  */
899 #define DLT_USB_LINUX_MMAPPED	220
900 
901 /*
902  * DECT packets, with a pseudo-header; requested by
903  * Matthias Wenzel <tcpdump@mazzoo.de>.
904  */
905 #define DLT_DECT		221
906 
907 /*
908  * From: "Lidwa, Eric (GSFC-582.0)[SGT INC]" <eric.lidwa-1@nasa.gov>
909  * Date: Mon, 11 May 2009 11:18:30 -0500
910  *
911  * DLT_AOS. We need it for AOS Space Data Link Protocol.
912  *   I have already written dissectors for but need an OK from
913  *   legal before I can submit a patch.
914  *
915  */
916 #define DLT_AOS                 222
917 
918 /*
919  * Wireless HART (Highway Addressable Remote Transducer)
920  * From the HART Communication Foundation
921  * IES/PAS 62591
922  *
923  * Requested by Sam Roberts <vieuxtech@gmail.com>.
924  */
925 #define DLT_WIHART		223
926 
927 /*
928  * Fibre Channel FC-2 frames, beginning with a Frame_Header.
929  * Requested by Kahou Lei <kahou82@gmail.com>.
930  */
931 #define DLT_FC_2		224
932 
933 /*
934  * Fibre Channel FC-2 frames, beginning with an encoding of the
935  * SOF, and ending with an encoding of the EOF.
936  *
937  * The encodings represent the frame delimiters as 4-byte sequences
938  * representing the corresponding ordered sets, with K28.5
939  * represented as 0xBC, and the D symbols as the corresponding
940  * byte values; for example, SOFi2, which is K28.5 - D21.5 - D1.2 - D21.2,
941  * is represented as 0xBC 0xB5 0x55 0x55.
942  *
943  * Requested by Kahou Lei <kahou82@gmail.com>.
944  */
945 #define DLT_FC_2_WITH_FRAME_DELIMS	225
946 
947 /*
948  * Solaris ipnet pseudo-header; requested by Darren Reed <Darren.Reed@Sun.COM>.
949  *
950  * The pseudo-header starts with a one-byte version number; for version 2,
951  * the pseudo-header is:
952  *
953  * struct dl_ipnetinfo {
954  *     uint8_t   dli_version;
955  *     uint8_t   dli_family;
956  *     uint16_t  dli_htype;
957  *     uint32_t  dli_pktlen;
958  *     uint32_t  dli_ifindex;
959  *     uint32_t  dli_grifindex;
960  *     uint32_t  dli_zsrc;
961  *     uint32_t  dli_zdst;
962  * };
963  *
964  * dli_version is 2 for the current version of the pseudo-header.
965  *
966  * dli_family is a Solaris address family value, so it's 2 for IPv4
967  * and 26 for IPv6.
968  *
969  * dli_htype is a "hook type" - 0 for incoming packets, 1 for outgoing
970  * packets, and 2 for packets arriving from another zone on the same
971  * machine.
972  *
973  * dli_pktlen is the length of the packet data following the pseudo-header
974  * (so the captured length minus dli_pktlen is the length of the
975  * pseudo-header, assuming the entire pseudo-header was captured).
976  *
977  * dli_ifindex is the interface index of the interface on which the
978  * packet arrived.
979  *
980  * dli_grifindex is the group interface index number (for IPMP interfaces).
981  *
982  * dli_zsrc is the zone identifier for the source of the packet.
983  *
984  * dli_zdst is the zone identifier for the destination of the packet.
985  *
986  * A zone number of 0 is the global zone; a zone number of 0xffffffff
987  * means that the packet arrived from another host on the network, not
988  * from another zone on the same machine.
989  *
990  * An IPv4 or IPv6 datagram follows the pseudo-header; dli_family indicates
991  * which of those it is.
992  */
993 #define DLT_IPNET		226
994 
995 /*
996  * CAN (Controller Area Network) frames, with a pseudo-header as supplied
997  * by Linux SocketCAN, and with multi-byte numerical fields in that header
998  * in big-endian byte order.
999  *
1000  * See Documentation/networking/can.txt in the Linux source.
1001  *
1002  * Requested by Felix Obenhuber <felix@obenhuber.de>.
1003  */
1004 #define DLT_CAN_SOCKETCAN	227
1005 
1006 /*
1007  * Raw IPv4/IPv6; different from DLT_RAW in that the DLT_ value specifies
1008  * whether it's v4 or v6.  Requested by Darren Reed <Darren.Reed@Sun.COM>.
1009  */
1010 #define DLT_IPV4		228
1011 #define DLT_IPV6		229
1012 
1013 /*
1014  * IEEE 802.15.4, exactly as it appears in the spec (no padding, no
1015  * nothing), and with no FCS at the end of the frame; requested by
1016  * Jon Smirl <jonsmirl@gmail.com>.
1017  */
1018 #define DLT_IEEE802_15_4_NOFCS	230
1019 
1020 /*
1021  * Raw D-Bus:
1022  *
1023  *	http://www.freedesktop.org/wiki/Software/dbus
1024  *
1025  * messages:
1026  *
1027  *	http://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-messages
1028  *
1029  * starting with the endianness flag, followed by the message type, etc.,
1030  * but without the authentication handshake before the message sequence:
1031  *
1032  *	http://dbus.freedesktop.org/doc/dbus-specification.html#auth-protocol
1033  *
1034  * Requested by Martin Vidner <martin@vidner.net>.
1035  */
1036 #define DLT_DBUS		231
1037 
1038 /*
1039  * Juniper-private data link type, as per request from
1040  * Hannes Gredler <hannes@juniper.net>.
1041  */
1042 #define DLT_JUNIPER_VS			232
1043 #define DLT_JUNIPER_SRX_E2E		233
1044 #define DLT_JUNIPER_FIBRECHANNEL	234
1045 
1046 /*
1047  * DVB-CI (DVB Common Interface for communication between a PC Card
1048  * module and a DVB receiver).  See
1049  *
1050  *	http://www.kaiser.cx/pcap-dvbci.html
1051  *
1052  * for the specification.
1053  *
1054  * Requested by Martin Kaiser <martin@kaiser.cx>.
1055  */
1056 #define DLT_DVB_CI		235
1057 
1058 /*
1059  * Variant of 3GPP TS 27.010 multiplexing protocol (similar to, but
1060  * *not* the same as, 27.010).  Requested by Hans-Christoph Schemmel
1061  * <hans-christoph.schemmel@cinterion.com>.
1062  */
1063 #define DLT_MUX27010		236
1064 
1065 /*
1066  * STANAG 5066 D_PDUs.  Requested by M. Baris Demiray
1067  * <barisdemiray@gmail.com>.
1068  */
1069 #define DLT_STANAG_5066_D_PDU	237
1070 
1071 /*
1072  * Juniper-private data link type, as per request from
1073  * Hannes Gredler <hannes@juniper.net>.
1074  */
1075 #define DLT_JUNIPER_ATM_CEMIC	238
1076 
1077 /*
1078  * NetFilter LOG messages
1079  * (payload of netlink NFNL_SUBSYS_ULOG/NFULNL_MSG_PACKET packets)
1080  *
1081  * Requested by Jakub Zawadzki <darkjames-ws@darkjames.pl>
1082  */
1083 #define DLT_NFLOG		239
1084 
1085 /*
1086  * Hilscher Gesellschaft fuer Systemautomation mbH link-layer type
1087  * for Ethernet packets with a 4-byte pseudo-header and always
1088  * with the payload including the FCS, as supplied by their
1089  * netANALYZER hardware and software.
1090  *
1091  * Requested by Holger P. Frommer <HPfrommer@hilscher.com>
1092  */
1093 #define DLT_NETANALYZER		240
1094 
1095 /*
1096  * Hilscher Gesellschaft fuer Systemautomation mbH link-layer type
1097  * for Ethernet packets with a 4-byte pseudo-header and FCS and
1098  * with the Ethernet header preceded by 7 bytes of preamble and
1099  * 1 byte of SFD, as supplied by their netANALYZER hardware and
1100  * software.
1101  *
1102  * Requested by Holger P. Frommer <HPfrommer@hilscher.com>
1103  */
1104 #define DLT_NETANALYZER_TRANSPARENT	241
1105 
1106 /*
1107  * IP-over-InfiniBand, as specified by RFC 4391.
1108  *
1109  * Requested by Petr Sumbera <petr.sumbera@oracle.com>.
1110  */
1111 #define DLT_IPOIB		242
1112 
1113 /*
1114  * MPEG-2 transport stream (ISO 13818-1/ITU-T H.222.0).
1115  *
1116  * Requested by Guy Martin <gmsoft@tuxicoman.be>.
1117  */
1118 #define DLT_MPEG_2_TS		243
1119 
1120 /*
1121  * ng4T GmbH's UMTS Iub/Iur-over-ATM and Iub/Iur-over-IP format as
1122  * used by their ng40 protocol tester.
1123  *
1124  * Requested by Jens Grimmer <jens.grimmer@ng4t.com>.
1125  */
1126 #define DLT_NG40		244
1127 
1128 /*
1129  * Pseudo-header giving adapter number and flags, followed by an NFC
1130  * (Near-Field Communications) Logical Link Control Protocol (LLCP) PDU,
1131  * as specified by NFC Forum Logical Link Control Protocol Technical
1132  * Specification LLCP 1.1.
1133  *
1134  * Requested by Mike Wakerly <mikey@google.com>.
1135  */
1136 #define DLT_NFC_LLCP		245
1137 
1138 /*
1139  * 246 is used as LINKTYPE_PFSYNC; do not use it for any other purpose.
1140  *
1141  * DLT_PFSYNC has different values on different platforms, and all of
1142  * them collide with something used elsewhere.  On platforms that
1143  * don't already define it, define it as 246.
1144  */
1145 #if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__) && !defined(__DragonFly__) && !defined(__APPLE__)
1146 #define DLT_PFSYNC		246
1147 #endif
1148 
1149 /*
1150  * Raw InfiniBand packets, starting with the Local Routing Header.
1151  *
1152  * Requested by Oren Kladnitsky <orenk@mellanox.com>.
1153  */
1154 #define DLT_INFINIBAND		247
1155 
1156 /*
1157  * SCTP, with no lower-level protocols (i.e., no IPv4 or IPv6).
1158  *
1159  * Requested by Michael Tuexen <Michael.Tuexen@lurchi.franken.de>.
1160  */
1161 #define DLT_SCTP		248
1162 
1163 /*
1164  * USB packets, beginning with a USBPcap header.
1165  *
1166  * Requested by Tomasz Mon <desowin@gmail.com>
1167  */
1168 #define DLT_USBPCAP		249
1169 
1170 /*
1171  * Schweitzer Engineering Laboratories "RTAC" product serial-line
1172  * packets.
1173  *
1174  * Requested by Chris Bontje <chris_bontje@selinc.com>.
1175  */
1176 #define DLT_RTAC_SERIAL		250
1177 
1178 /*
1179  * Bluetooth Low Energy air interface link-layer packets.
1180  *
1181  * Requested by Mike Kershaw <dragorn@kismetwireless.net>.
1182  */
1183 #define DLT_BLUETOOTH_LE_LL	251
1184 
1185 /*
1186  * DLT type for upper-protocol layer PDU saves from wireshark.
1187  *
1188  * the actual contents are determined by two TAGs stored with each
1189  * packet:
1190  *   EXP_PDU_TAG_LINKTYPE          the link type (LINKTYPE_ value) of the
1191  *				   original packet.
1192  *
1193  *   EXP_PDU_TAG_PROTO_NAME        the name of the wireshark dissector
1194  * 				   that can make sense of the data stored.
1195  */
1196 #define DLT_WIRESHARK_UPPER_PDU	252
1197 
1198 /*
1199  * DLT type for the netlink protocol (nlmon devices).
1200  */
1201 #define DLT_NETLINK		253
1202 
1203 /*
1204  * Bluetooth Linux Monitor headers for the BlueZ stack.
1205  */
1206 #define DLT_BLUETOOTH_LINUX_MONITOR	254
1207 
1208 /*
1209  * Bluetooth Basic Rate/Enhanced Data Rate baseband packets, as
1210  * captured by Ubertooth.
1211  */
1212 #define DLT_BLUETOOTH_BREDR_BB	255
1213 
1214 /*
1215  * Bluetooth Low Energy link layer packets, as captured by Ubertooth.
1216  */
1217 #define DLT_BLUETOOTH_LE_LL_WITH_PHDR	256
1218 
1219 /*
1220  * PROFIBUS data link layer.
1221  */
1222 #define DLT_PROFIBUS_DL		257
1223 
1224 /*
1225  * Apple's DLT_PKTAP headers.
1226  *
1227  * Sadly, the folks at Apple either had no clue that the DLT_USERn values
1228  * are for internal use within an organization and partners only, and
1229  * didn't know that the right way to get a link-layer header type is to
1230  * ask tcpdump.org for one, or knew and didn't care, so they just
1231  * used DLT_USER2, which causes problems for everything except for
1232  * their version of tcpdump.
1233  *
1234  * So I'll just give them one; hopefully this will show up in a
1235  * libpcap release in time for them to get this into 10.10 Big Sur
1236  * or whatever Mavericks' successor is called.  LINKTYPE_PKTAP
1237  * will be 258 *even on macOS*; that is *intentional*, so that
1238  * PKTAP files look the same on *all* OSes (different OSes can have
1239  * different numerical values for a given DLT_, but *MUST NOT* have
1240  * different values for what goes in a file, as files can be moved
1241  * between OSes!).
1242  *
1243  * When capturing, on a system with a Darwin-based OS, on a device
1244  * that returns 149 (DLT_USER2 and Apple's DLT_PKTAP) with this
1245  * version of libpcap, the DLT_ value for the pcap_t  will be DLT_PKTAP,
1246  * and that will continue to be DLT_USER2 on Darwin-based OSes. That way,
1247  * binary compatibility with Mavericks is preserved for programs using
1248  * this version of libpcap.  This does mean that if you were using
1249  * DLT_USER2 for some capture device on macOS, you can't do so with
1250  * this version of libpcap, just as you can't with Apple's libpcap -
1251  * on macOS, they define DLT_PKTAP to be DLT_USER2, so programs won't
1252  * be able to distinguish between PKTAP and whatever you were using
1253  * DLT_USER2 for.
1254  *
1255  * If the program saves the capture to a file using this version of
1256  * libpcap's pcap_dump code, the LINKTYPE_ value in the file will be
1257  * LINKTYPE_PKTAP, which will be 258, even on Darwin-based OSes.
1258  * That way, the file will *not* be a DLT_USER2 file.  That means
1259  * that the latest version of tcpdump, when built with this version
1260  * of libpcap, and sufficiently recent versions of Wireshark will
1261  * be able to read those files and interpret them correctly; however,
1262  * Apple's version of tcpdump in OS X 10.9 won't be able to handle
1263  * them.  (Hopefully, Apple will pick up this version of libpcap,
1264  * and the corresponding version of tcpdump, so that tcpdump will
1265  * be able to handle the old LINKTYPE_USER2 captures *and* the new
1266  * LINKTYPE_PKTAP captures.)
1267  */
1268 #ifdef __APPLE__
1269 #define DLT_PKTAP	DLT_USER2
1270 #else
1271 #define DLT_PKTAP	258
1272 #endif
1273 
1274 /*
1275  * Ethernet packets preceded by a header giving the last 6 octets
1276  * of the preamble specified by 802.3-2012 Clause 65, section
1277  * 65.1.3.2 "Transmit".
1278  */
1279 #define DLT_EPON	259
1280 
1281 /*
1282  * IPMI trace packets, as specified by Table 3-20 "Trace Data Block Format"
1283  * in the PICMG HPM.2 specification.
1284  */
1285 #define DLT_IPMI_HPM_2	260
1286 
1287 /*
1288  * per  Joshua Wright <jwright@hasborg.com>, formats for Zwave captures.
1289  */
1290 #define DLT_ZWAVE_R1_R2  261
1291 #define DLT_ZWAVE_R3     262
1292 
1293 /*
1294  * per Steve Karg <skarg@users.sourceforge.net>, formats for Wattstopper
1295  * Digital Lighting Management room bus serial protocol captures.
1296  */
1297 #define DLT_WATTSTOPPER_DLM     263
1298 
1299 /*
1300  * ISO 14443 contactless smart card messages.
1301  */
1302 #define DLT_ISO_14443	264
1303 
1304 /*
1305  * Radio data system (RDS) groups.  IEC 62106.
1306  * Per Jonathan Brucker <jonathan.brucke@gmail.com>.
1307  */
1308 #define DLT_RDS		265
1309 
1310 /*
1311  * USB packets, beginning with a Darwin (macOS, etc.) header.
1312  */
1313 #define DLT_USB_DARWIN	266
1314 
1315 /*
1316  * OpenBSD DLT_OPENFLOW.
1317  */
1318 #define DLT_OPENFLOW	267
1319 
1320 /*
1321  * SDLC frames containing SNA PDUs.
1322  */
1323 #define DLT_SDLC	268
1324 
1325 /*
1326  * per "Selvig, Bjorn" <b.selvig@ti.com> used for
1327  * TI protocol sniffer.
1328  */
1329 #define DLT_TI_LLN_SNIFFER	269
1330 
1331 /*
1332  * per: Erik de Jong <erikdejong at gmail.com> for
1333  *   https://github.com/eriknl/LoRaTap/releases/tag/v0.1
1334  */
1335 #define DLT_LORATAP             270
1336 
1337 /*
1338  * per: Stefanha at gmail.com for
1339  *   http://lists.sandelman.ca/pipermail/tcpdump-workers/2017-May/000772.html
1340  * and: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/uapi/linux/vsockmon.h
1341  * for: http://qemu-project.org/Features/VirtioVsock
1342  */
1343 #define DLT_VSOCK               271
1344 
1345 /*
1346  * Nordic Semiconductor Bluetooth LE sniffer.
1347  */
1348 #define DLT_NORDIC_BLE		272
1349 
1350 /*
1351  * Excentis DOCSIS 3.1 RF sniffer (XRA-31)
1352  *   per: bruno.verstuyft at excentis.com
1353  *        http://www.xra31.com/xra-header
1354  */
1355 #define DLT_DOCSIS31_XRA31	273
1356 
1357 /*
1358  * mPackets, as specified by IEEE 802.3br Figure 99-4, starting
1359  * with the preamble and always ending with a CRC field.
1360  */
1361 #define DLT_ETHERNET_MPACKET	274
1362 
1363 /*
1364  * DisplayPort AUX channel monitoring data as specified by VESA
1365  * DisplayPort(DP) Standard preceeded by a pseudo-header.
1366  *    per dirk.eibach at gdsys.cc
1367  */
1368 #define DLT_DISPLAYPORT_AUX	275
1369 
1370 /*
1371  * In case the code that includes this file (directly or indirectly)
1372  * has also included OS files that happen to define DLT_MATCHING_MAX,
1373  * with a different value (perhaps because that OS hasn't picked up
1374  * the latest version of our DLT definitions), we undefine the
1375  * previous value of DLT_MATCHING_MAX.
1376  */
1377 #ifdef DLT_MATCHING_MAX
1378 #undef DLT_MATCHING_MAX
1379 #endif
1380 #define DLT_MATCHING_MAX	275	/* highest value in the "matching" range */
1381 
1382 /*
1383  * DLT and savefile link type values are split into a class and
1384  * a member of that class.  A class value of 0 indicates a regular
1385  * DLT_/LINKTYPE_ value.
1386  */
1387 #define DLT_CLASS(x)		((x) & 0x03ff0000)
1388 
1389 /*
1390  * NetBSD-specific generic "raw" link type.  The class value indicates
1391  * that this is the generic raw type, and the lower 16 bits are the
1392  * address family we're dealing with.  Those values are NetBSD-specific;
1393  * do not assume that they correspond to AF_ values for your operating
1394  * system.
1395  */
1396 #define	DLT_CLASS_NETBSD_RAWAF	0x02240000
1397 #define	DLT_NETBSD_RAWAF(af)	(DLT_CLASS_NETBSD_RAWAF | (af))
1398 #define	DLT_NETBSD_RAWAF_AF(x)	((x) & 0x0000ffff)
1399 #define	DLT_IS_NETBSD_RAWAF(x)	(DLT_CLASS(x) == DLT_CLASS_NETBSD_RAWAF)
1400 
1401 #endif /* !defined(lib_pcap_dlt_h) */
1402