xref: /freebsd/contrib/libpcap/pcap/dlt.h (revision 193d9e768ba63fcfb187cfd17f461f7d41345048)
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  * Mac OS X; don't use it for anything else.  (FreeBSD uses 121,
124  * which collides with DLT_HHDLC, even though it doesn't use 18
125  * for 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 OS X - 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 #define DLT_IEEE802_15_4	195
745 
746 /*
747  * Various link-layer types, with a pseudo-header, for SITA
748  * (http://www.sita.aero/); requested by Fulko Hew (fulko.hew@gmail.com).
749  */
750 #define DLT_SITA		196
751 
752 /*
753  * Various link-layer types, with a pseudo-header, for Endace DAG cards;
754  * encapsulates Endace ERF records.  Requested by Stephen Donnelly
755  * <stephen@endace.com>.
756  */
757 #define DLT_ERF			197
758 
759 /*
760  * Special header prepended to Ethernet packets when capturing from a
761  * u10 Networks board.  Requested by Phil Mulholland
762  * <phil@u10networks.com>.
763  */
764 #define DLT_RAIF1		198
765 
766 /*
767  * IPMB packet for IPMI, beginning with the I2C slave address, followed
768  * by the netFn and LUN, etc..  Requested by Chanthy Toeung
769  * <chanthy.toeung@ca.kontron.com>.
770  */
771 #define DLT_IPMB		199
772 
773 /*
774  * Juniper-private data link type, as per request from
775  * Hannes Gredler <hannes@juniper.net>.
776  * The DLT_ is used for capturing data on a secure tunnel interface.
777  */
778 #define DLT_JUNIPER_ST          200
779 
780 /*
781  * Bluetooth HCI UART transport layer (part H:4), with pseudo-header
782  * that includes direction information; requested by Paolo Abeni.
783  */
784 #define DLT_BLUETOOTH_HCI_H4_WITH_PHDR	201
785 
786 /*
787  * AX.25 packet with a 1-byte KISS header; see
788  *
789  *	http://www.ax25.net/kiss.htm
790  *
791  * as per Richard Stearn <richard@rns-stearn.demon.co.uk>.
792  */
793 #define DLT_AX25_KISS		202
794 
795 /*
796  * LAPD packets from an ISDN channel, starting with the address field,
797  * with no pseudo-header.
798  * Requested by Varuna De Silva <varunax@gmail.com>.
799  */
800 #define DLT_LAPD		203
801 
802 /*
803  * Variants of various link-layer headers, with a one-byte direction
804  * pseudo-header prepended - zero means "received by this host",
805  * non-zero (any non-zero value) means "sent by this host" - as per
806  * Will Barker <w.barker@zen.co.uk>.
807  */
808 #define DLT_PPP_WITH_DIR	204	/* PPP - don't confuse with DLT_PPP_WITH_DIRECTION */
809 #define DLT_C_HDLC_WITH_DIR	205	/* Cisco HDLC */
810 #define DLT_FRELAY_WITH_DIR	206	/* Frame Relay */
811 #define DLT_LAPB_WITH_DIR	207	/* LAPB */
812 
813 /*
814  * 208 is reserved for an as-yet-unspecified proprietary link-layer
815  * type, as requested by Will Barker.
816  */
817 
818 /*
819  * IPMB with a Linux-specific pseudo-header; as requested by Alexey Neyman
820  * <avn@pigeonpoint.com>.
821  */
822 #define DLT_IPMB_LINUX		209
823 
824 /*
825  * FlexRay automotive bus - http://www.flexray.com/ - as requested
826  * by Hannes Kaelber <hannes.kaelber@x2e.de>.
827  */
828 #define DLT_FLEXRAY		210
829 
830 /*
831  * Media Oriented Systems Transport (MOST) bus for multimedia
832  * transport - http://www.mostcooperation.com/ - as requested
833  * by Hannes Kaelber <hannes.kaelber@x2e.de>.
834  */
835 #define DLT_MOST		211
836 
837 /*
838  * Local Interconnect Network (LIN) bus for vehicle networks -
839  * http://www.lin-subbus.org/ - as requested by Hannes Kaelber
840  * <hannes.kaelber@x2e.de>.
841  */
842 #define DLT_LIN			212
843 
844 /*
845  * X2E-private data link type used for serial line capture,
846  * as requested by Hannes Kaelber <hannes.kaelber@x2e.de>.
847  */
848 #define DLT_X2E_SERIAL		213
849 
850 /*
851  * X2E-private data link type used for the Xoraya data logger
852  * family, as requested by Hannes Kaelber <hannes.kaelber@x2e.de>.
853  */
854 #define DLT_X2E_XORAYA		214
855 
856 /*
857  * IEEE 802.15.4, exactly as it appears in the spec (no padding, no
858  * nothing), but with the PHY-level data for non-ASK PHYs (4 octets
859  * of 0 as preamble, one octet of SFD, one octet of frame length+
860  * reserved bit, and then the MAC-layer data, starting with the
861  * frame control field).
862  *
863  * Requested by Max Filippov <jcmvbkbc@gmail.com>.
864  */
865 #define DLT_IEEE802_15_4_NONASK_PHY	215
866 
867 /*
868  * David Gibson <david@gibson.dropbear.id.au> requested this for
869  * captures from the Linux kernel /dev/input/eventN devices. This
870  * is used to communicate keystrokes and mouse movements from the
871  * Linux kernel to display systems, such as Xorg.
872  */
873 #define DLT_LINUX_EVDEV		216
874 
875 /*
876  * GSM Um and Abis interfaces, preceded by a "gsmtap" header.
877  *
878  * Requested by Harald Welte <laforge@gnumonks.org>.
879  */
880 #define DLT_GSMTAP_UM		217
881 #define DLT_GSMTAP_ABIS		218
882 
883 /*
884  * MPLS, with an MPLS label as the link-layer header.
885  * Requested by Michele Marchetto <michele@openbsd.org> on behalf
886  * of OpenBSD.
887  */
888 #define DLT_MPLS		219
889 
890 /*
891  * USB packets, beginning with a Linux USB header, with the USB header
892  * padded to 64 bytes; required for memory-mapped access.
893  */
894 #define DLT_USB_LINUX_MMAPPED	220
895 
896 /*
897  * DECT packets, with a pseudo-header; requested by
898  * Matthias Wenzel <tcpdump@mazzoo.de>.
899  */
900 #define DLT_DECT		221
901 
902 /*
903  * From: "Lidwa, Eric (GSFC-582.0)[SGT INC]" <eric.lidwa-1@nasa.gov>
904  * Date: Mon, 11 May 2009 11:18:30 -0500
905  *
906  * DLT_AOS. We need it for AOS Space Data Link Protocol.
907  *   I have already written dissectors for but need an OK from
908  *   legal before I can submit a patch.
909  *
910  */
911 #define DLT_AOS                 222
912 
913 /*
914  * Wireless HART (Highway Addressable Remote Transducer)
915  * From the HART Communication Foundation
916  * IES/PAS 62591
917  *
918  * Requested by Sam Roberts <vieuxtech@gmail.com>.
919  */
920 #define DLT_WIHART		223
921 
922 /*
923  * Fibre Channel FC-2 frames, beginning with a Frame_Header.
924  * Requested by Kahou Lei <kahou82@gmail.com>.
925  */
926 #define DLT_FC_2		224
927 
928 /*
929  * Fibre Channel FC-2 frames, beginning with an encoding of the
930  * SOF, and ending with an encoding of the EOF.
931  *
932  * The encodings represent the frame delimiters as 4-byte sequences
933  * representing the corresponding ordered sets, with K28.5
934  * represented as 0xBC, and the D symbols as the corresponding
935  * byte values; for example, SOFi2, which is K28.5 - D21.5 - D1.2 - D21.2,
936  * is represented as 0xBC 0xB5 0x55 0x55.
937  *
938  * Requested by Kahou Lei <kahou82@gmail.com>.
939  */
940 #define DLT_FC_2_WITH_FRAME_DELIMS	225
941 
942 /*
943  * Solaris ipnet pseudo-header; requested by Darren Reed <Darren.Reed@Sun.COM>.
944  *
945  * The pseudo-header starts with a one-byte version number; for version 2,
946  * the pseudo-header is:
947  *
948  * struct dl_ipnetinfo {
949  *     u_int8_t   dli_version;
950  *     u_int8_t   dli_family;
951  *     u_int16_t  dli_htype;
952  *     u_int32_t  dli_pktlen;
953  *     u_int32_t  dli_ifindex;
954  *     u_int32_t  dli_grifindex;
955  *     u_int32_t  dli_zsrc;
956  *     u_int32_t  dli_zdst;
957  * };
958  *
959  * dli_version is 2 for the current version of the pseudo-header.
960  *
961  * dli_family is a Solaris address family value, so it's 2 for IPv4
962  * and 26 for IPv6.
963  *
964  * dli_htype is a "hook type" - 0 for incoming packets, 1 for outgoing
965  * packets, and 2 for packets arriving from another zone on the same
966  * machine.
967  *
968  * dli_pktlen is the length of the packet data following the pseudo-header
969  * (so the captured length minus dli_pktlen is the length of the
970  * pseudo-header, assuming the entire pseudo-header was captured).
971  *
972  * dli_ifindex is the interface index of the interface on which the
973  * packet arrived.
974  *
975  * dli_grifindex is the group interface index number (for IPMP interfaces).
976  *
977  * dli_zsrc is the zone identifier for the source of the packet.
978  *
979  * dli_zdst is the zone identifier for the destination of the packet.
980  *
981  * A zone number of 0 is the global zone; a zone number of 0xffffffff
982  * means that the packet arrived from another host on the network, not
983  * from another zone on the same machine.
984  *
985  * An IPv4 or IPv6 datagram follows the pseudo-header; dli_family indicates
986  * which of those it is.
987  */
988 #define DLT_IPNET		226
989 
990 /*
991  * CAN (Controller Area Network) frames, with a pseudo-header as supplied
992  * by Linux SocketCAN, and with multi-byte numerical fields in that header
993  * in big-endian byte order.
994  *
995  * See Documentation/networking/can.txt in the Linux source.
996  *
997  * Requested by Felix Obenhuber <felix@obenhuber.de>.
998  */
999 #define DLT_CAN_SOCKETCAN	227
1000 
1001 /*
1002  * Raw IPv4/IPv6; different from DLT_RAW in that the DLT_ value specifies
1003  * whether it's v4 or v6.  Requested by Darren Reed <Darren.Reed@Sun.COM>.
1004  */
1005 #define DLT_IPV4		228
1006 #define DLT_IPV6		229
1007 
1008 /*
1009  * IEEE 802.15.4, exactly as it appears in the spec (no padding, no
1010  * nothing), and with no FCS at the end of the frame; requested by
1011  * Jon Smirl <jonsmirl@gmail.com>.
1012  */
1013 #define DLT_IEEE802_15_4_NOFCS	230
1014 
1015 /*
1016  * Raw D-Bus:
1017  *
1018  *	http://www.freedesktop.org/wiki/Software/dbus
1019  *
1020  * messages:
1021  *
1022  *	http://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-messages
1023  *
1024  * starting with the endianness flag, followed by the message type, etc.,
1025  * but without the authentication handshake before the message sequence:
1026  *
1027  *	http://dbus.freedesktop.org/doc/dbus-specification.html#auth-protocol
1028  *
1029  * Requested by Martin Vidner <martin@vidner.net>.
1030  */
1031 #define DLT_DBUS		231
1032 
1033 /*
1034  * Juniper-private data link type, as per request from
1035  * Hannes Gredler <hannes@juniper.net>.
1036  */
1037 #define DLT_JUNIPER_VS			232
1038 #define DLT_JUNIPER_SRX_E2E		233
1039 #define DLT_JUNIPER_FIBRECHANNEL	234
1040 
1041 /*
1042  * DVB-CI (DVB Common Interface for communication between a PC Card
1043  * module and a DVB receiver).  See
1044  *
1045  *	http://www.kaiser.cx/pcap-dvbci.html
1046  *
1047  * for the specification.
1048  *
1049  * Requested by Martin Kaiser <martin@kaiser.cx>.
1050  */
1051 #define DLT_DVB_CI		235
1052 
1053 /*
1054  * Variant of 3GPP TS 27.010 multiplexing protocol (similar to, but
1055  * *not* the same as, 27.010).  Requested by Hans-Christoph Schemmel
1056  * <hans-christoph.schemmel@cinterion.com>.
1057  */
1058 #define DLT_MUX27010		236
1059 
1060 /*
1061  * STANAG 5066 D_PDUs.  Requested by M. Baris Demiray
1062  * <barisdemiray@gmail.com>.
1063  */
1064 #define DLT_STANAG_5066_D_PDU	237
1065 
1066 /*
1067  * Juniper-private data link type, as per request from
1068  * Hannes Gredler <hannes@juniper.net>.
1069  */
1070 #define DLT_JUNIPER_ATM_CEMIC	238
1071 
1072 /*
1073  * NetFilter LOG messages
1074  * (payload of netlink NFNL_SUBSYS_ULOG/NFULNL_MSG_PACKET packets)
1075  *
1076  * Requested by Jakub Zawadzki <darkjames-ws@darkjames.pl>
1077  */
1078 #define DLT_NFLOG		239
1079 
1080 /*
1081  * Hilscher Gesellschaft fuer Systemautomation mbH link-layer type
1082  * for Ethernet packets with a 4-byte pseudo-header and always
1083  * with the payload including the FCS, as supplied by their
1084  * netANALYZER hardware and software.
1085  *
1086  * Requested by Holger P. Frommer <HPfrommer@hilscher.com>
1087  */
1088 #define DLT_NETANALYZER		240
1089 
1090 /*
1091  * Hilscher Gesellschaft fuer Systemautomation mbH link-layer type
1092  * for Ethernet packets with a 4-byte pseudo-header and FCS and
1093  * with the Ethernet header preceded by 7 bytes of preamble and
1094  * 1 byte of SFD, as supplied by their netANALYZER hardware and
1095  * software.
1096  *
1097  * Requested by Holger P. Frommer <HPfrommer@hilscher.com>
1098  */
1099 #define DLT_NETANALYZER_TRANSPARENT	241
1100 
1101 /*
1102  * IP-over-InfiniBand, as specified by RFC 4391.
1103  *
1104  * Requested by Petr Sumbera <petr.sumbera@oracle.com>.
1105  */
1106 #define DLT_IPOIB		242
1107 
1108 /*
1109  * MPEG-2 transport stream (ISO 13818-1/ITU-T H.222.0).
1110  *
1111  * Requested by Guy Martin <gmsoft@tuxicoman.be>.
1112  */
1113 #define DLT_MPEG_2_TS		243
1114 
1115 /*
1116  * ng4T GmbH's UMTS Iub/Iur-over-ATM and Iub/Iur-over-IP format as
1117  * used by their ng40 protocol tester.
1118  *
1119  * Requested by Jens Grimmer <jens.grimmer@ng4t.com>.
1120  */
1121 #define DLT_NG40		244
1122 
1123 /*
1124  * Pseudo-header giving adapter number and flags, followed by an NFC
1125  * (Near-Field Communications) Logical Link Control Protocol (LLCP) PDU,
1126  * as specified by NFC Forum Logical Link Control Protocol Technical
1127  * Specification LLCP 1.1.
1128  *
1129  * Requested by Mike Wakerly <mikey@google.com>.
1130  */
1131 #define DLT_NFC_LLCP		245
1132 
1133 /*
1134  * 246 is used as LINKTYPE_PFSYNC; do not use it for any other purpose.
1135  *
1136  * DLT_PFSYNC has different values on different platforms, and all of
1137  * them collide with something used elsewhere.  On platforms that
1138  * don't already define it, define it as 246.
1139  */
1140 #if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__) && !defined(__DragonFly__) && !defined(__APPLE__)
1141 #define DLT_PFSYNC		246
1142 #endif
1143 
1144 /*
1145  * Raw InfiniBand packets, starting with the Local Routing Header.
1146  *
1147  * Requested by Oren Kladnitsky <orenk@mellanox.com>.
1148  */
1149 #define DLT_INFINIBAND		247
1150 
1151 /*
1152  * SCTP, with no lower-level protocols (i.e., no IPv4 or IPv6).
1153  *
1154  * Requested by Michael Tuexen <Michael.Tuexen@lurchi.franken.de>.
1155  */
1156 #define DLT_SCTP		248
1157 
1158 /*
1159  * USB packets, beginning with a USBPcap header.
1160  *
1161  * Requested by Tomasz Mon <desowin@gmail.com>
1162  */
1163 #define DLT_USBPCAP		249
1164 
1165 /*
1166  * Schweitzer Engineering Laboratories "RTAC" product serial-line
1167  * packets.
1168  *
1169  * Requested by Chris Bontje <chris_bontje@selinc.com>.
1170  */
1171 #define DLT_RTAC_SERIAL		250
1172 
1173 /*
1174  * Bluetooth Low Energy air interface link-layer packets.
1175  *
1176  * Requested by Mike Kershaw <dragorn@kismetwireless.net>.
1177  */
1178 #define DLT_BLUETOOTH_LE_LL	251
1179 
1180 /*
1181  * DLT type for upper-protocol layer PDU saves from wireshark.
1182  *
1183  * the actual contents are determined by two TAGs stored with each
1184  * packet:
1185  *   EXP_PDU_TAG_LINKTYPE          the link type (LINKTYPE_ value) of the
1186  *				   original packet.
1187  *
1188  *   EXP_PDU_TAG_PROTO_NAME        the name of the wireshark dissector
1189  * 				   that can make sense of the data stored.
1190  */
1191 #define DLT_WIRESHARK_UPPER_PDU	252
1192 
1193 /*
1194  * DLT type for the netlink protocol (nlmon devices).
1195  */
1196 #define DLT_NETLINK		253
1197 
1198 /*
1199  * Bluetooth Linux Monitor headers for the BlueZ stack.
1200  */
1201 #define DLT_BLUETOOTH_LINUX_MONITOR	254
1202 
1203 /*
1204  * Bluetooth Basic Rate/Enhanced Data Rate baseband packets, as
1205  * captured by Ubertooth.
1206  */
1207 #define DLT_BLUETOOTH_BREDR_BB	255
1208 
1209 /*
1210  * Bluetooth Low Energy link layer packets, as captured by Ubertooth.
1211  */
1212 #define DLT_BLUETOOTH_LE_LL_WITH_PHDR	256
1213 
1214 /*
1215  * PROFIBUS data link layer.
1216  */
1217 #define DLT_PROFIBUS_DL		257
1218 
1219 /*
1220  * Apple's DLT_PKTAP headers.
1221  *
1222  * Sadly, the folks at Apple either had no clue that the DLT_USERn values
1223  * are for internal use within an organization and partners only, and
1224  * didn't know that the right way to get a link-layer header type is to
1225  * ask tcpdump.org for one, or knew and didn't care, so they just
1226  * used DLT_USER2, which causes problems for everything except for
1227  * their version of tcpdump.
1228  *
1229  * So I'll just give them one; hopefully this will show up in a
1230  * libpcap release in time for them to get this into 10.10 Big Sur
1231  * or whatever Mavericks' successor is called.  LINKTYPE_PKTAP
1232  * will be 258 *even on OS X*; that is *intentional*, so that
1233  * PKTAP files look the same on *all* OSes (different OSes can have
1234  * different numerical values for a given DLT_, but *MUST NOT* have
1235  * different values for what goes in a file, as files can be moved
1236  * between OSes!).
1237  *
1238  * When capturing, on a system with a Darwin-based OS, on a device
1239  * that returns 149 (DLT_USER2 and Apple's DLT_PKTAP) with this
1240  * version of libpcap, the DLT_ value for the pcap_t  will be DLT_PKTAP,
1241  * and that will continue to be DLT_USER2 on Darwin-based OSes. That way,
1242  * binary compatibility with Mavericks is preserved for programs using
1243  * this version of libpcap.  This does mean that if you were using
1244  * DLT_USER2 for some capture device on OS X, you can't do so with
1245  * this version of libpcap, just as you can't with Apple's libpcap -
1246  * on OS X, they define DLT_PKTAP to be DLT_USER2, so programs won't
1247  * be able to distinguish between PKTAP and whatever you were using
1248  * DLT_USER2 for.
1249  *
1250  * If the program saves the capture to a file using this version of
1251  * libpcap's pcap_dump code, the LINKTYPE_ value in the file will be
1252  * LINKTYPE_PKTAP, which will be 258, even on Darwin-based OSes.
1253  * That way, the file will *not* be a DLT_USER2 file.  That means
1254  * that the latest version of tcpdump, when built with this version
1255  * of libpcap, and sufficiently recent versions of Wireshark will
1256  * be able to read those files and interpret them correctly; however,
1257  * Apple's version of tcpdump in OS X 10.9 won't be able to handle
1258  * them.  (Hopefully, Apple will pick up this version of libpcap,
1259  * and the corresponding version of tcpdump, so that tcpdump will
1260  * be able to handle the old LINKTYPE_USER2 captures *and* the new
1261  * LINKTYPE_PKTAP captures.)
1262  */
1263 #ifdef __APPLE__
1264 #define DLT_PKTAP	DLT_USER2
1265 #else
1266 #define DLT_PKTAP	258
1267 #endif
1268 
1269 /*
1270  * Ethernet packets preceded by a header giving the last 6 octets
1271  * of the preamble specified by 802.3-2012 Clause 65, section
1272  * 65.1.3.2 "Transmit".
1273  */
1274 #define DLT_EPON	259
1275 
1276 /*
1277  * IPMI trace packets, as specified by Table 3-20 "Trace Data Block Format"
1278  * in the PICMG HPM.2 specification.
1279  */
1280 #define DLT_IPMI_HPM_2	260
1281 
1282 /*
1283  * per  Joshua Wright <jwright@hasborg.com>, formats for Zwave captures.
1284  */
1285 #define DLT_ZWAVE_R1_R2  261
1286 #define DLT_ZWAVE_R3     262
1287 
1288 /*
1289  * per Steve Karg <skarg@users.sourceforge.net>, formats for Wattstopper
1290  * Digital Lighting Management room bus serial protocol captures.
1291  */
1292 #define DLT_WATTSTOPPER_DLM     263
1293 
1294 /*
1295  * ISO 14443 contactless smart card messages.
1296  */
1297 #define DLT_ISO_14443	264
1298 
1299 /*
1300  * Radio data system (RDS) groups.  IEC 62106.
1301  * Per Jonathan Brucker <jonathan.brucke@gmail.com>.
1302  */
1303 #define DLT_RDS		265
1304 
1305 /*
1306  * In case the code that includes this file (directly or indirectly)
1307  * has also included OS files that happen to define DLT_MATCHING_MAX,
1308  * with a different value (perhaps because that OS hasn't picked up
1309  * the latest version of our DLT definitions), we undefine the
1310  * previous value of DLT_MATCHING_MAX.
1311  */
1312 #ifdef DLT_MATCHING_MAX
1313 #undef DLT_MATCHING_MAX
1314 #endif
1315 #define DLT_MATCHING_MAX	265	/* highest value in the "matching" range */
1316 
1317 /*
1318  * DLT and savefile link type values are split into a class and
1319  * a member of that class.  A class value of 0 indicates a regular
1320  * DLT_/LINKTYPE_ value.
1321  */
1322 #define DLT_CLASS(x)		((x) & 0x03ff0000)
1323 
1324 /*
1325  * NetBSD-specific generic "raw" link type.  The class value indicates
1326  * that this is the generic raw type, and the lower 16 bits are the
1327  * address family we're dealing with.  Those values are NetBSD-specific;
1328  * do not assume that they correspond to AF_ values for your operating
1329  * system.
1330  */
1331 #define	DLT_CLASS_NETBSD_RAWAF	0x02240000
1332 #define	DLT_NETBSD_RAWAF(af)	(DLT_CLASS_NETBSD_RAWAF | (af))
1333 #define	DLT_NETBSD_RAWAF_AF(x)	((x) & 0x0000ffff)
1334 #define	DLT_IS_NETBSD_RAWAF(x)	(DLT_CLASS(x) == DLT_CLASS_NETBSD_RAWAF)
1335 
1336 #endif /* !defined(lib_pcap_dlt_h) */
1337