• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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. All advertising materials mentioning features or use of this software
19  *    must display the following acknowledgement:
20  *      This product includes software developed by the University of
21  *      California, Berkeley and its contributors.
22  * 4. Neither the name of the University nor the names of its contributors
23  *    may be used to endorse or promote products derived from this software
24  *    without specific prior written permission.
25  *
26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36  * SUCH DAMAGE.
37  *
38  *      @(#)bpf.h       7.1 (Berkeley) 5/7/91
39  */
40 
41 #ifndef lib_pcap_dlt_h
42 #define lib_pcap_dlt_h
43 
44 /*
45  * Link-layer header type codes.
46  *
47  * Do *NOT* add new values to this list without asking
48  * "tcpdump-workers@lists.tcpdump.org" for a value.  Otherwise, you run
49  * the risk of using a value that's already being used for some other
50  * purpose, and of having tools that read libpcap-format captures not
51  * being able to handle captures with your new DLT_ value, with no hope
52  * that they will ever be changed to do so (as that would destroy their
53  * ability to read captures using that value for that other purpose).
54  *
55  * See
56  *
57  *	http://www.tcpdump.org/linktypes.html
58  *
59  * for detailed descriptions of some of these link-layer header types.
60  */
61 
62 /*
63  * These are the types that are the same on all platforms, and that
64  * have been defined by <net/bpf.h> for ages.
65  */
66 #define DLT_NULL	0	/* BSD loopback encapsulation */
67 #define DLT_EN10MB	1	/* Ethernet (10Mb) */
68 #define DLT_EN3MB	2	/* Experimental Ethernet (3Mb) */
69 #define DLT_AX25	3	/* Amateur Radio AX.25 */
70 #define DLT_PRONET	4	/* Proteon ProNET Token Ring */
71 #define DLT_CHAOS	5	/* Chaos */
72 #define DLT_IEEE802	6	/* 802.5 Token Ring */
73 #define DLT_ARCNET	7	/* ARCNET, with BSD-style header */
74 #define DLT_SLIP	8	/* Serial Line IP */
75 #define DLT_PPP		9	/* Point-to-point Protocol */
76 #define DLT_FDDI	10	/* FDDI */
77 
78 /*
79  * These are types that are different on some platforms, and that
80  * have been defined by <net/bpf.h> for ages.  We use #ifdefs to
81  * detect the BSDs that define them differently from the traditional
82  * libpcap <net/bpf.h>
83  *
84  * XXX - DLT_ATM_RFC1483 is 13 in BSD/OS, and DLT_RAW is 14 in BSD/OS,
85  * but I don't know what the right #define is for BSD/OS.
86  */
87 #define DLT_ATM_RFC1483	11	/* LLC-encapsulated ATM */
88 
89 #ifdef __OpenBSD__
90 #define DLT_RAW		14	/* raw IP */
91 #else
92 #define DLT_RAW		12	/* raw IP */
93 #endif
94 
95 /*
96  * Given that the only OS that currently generates BSD/OS SLIP or PPP
97  * is, well, BSD/OS, arguably everybody should have chosen its values
98  * for DLT_SLIP_BSDOS and DLT_PPP_BSDOS, which are 15 and 16, but they
99  * didn't.  So it goes.
100  */
101 #if defined(__NetBSD__) || defined(__FreeBSD__)
102 #ifndef DLT_SLIP_BSDOS
103 #define DLT_SLIP_BSDOS	13	/* BSD/OS Serial Line IP */
104 #define DLT_PPP_BSDOS	14	/* BSD/OS Point-to-point Protocol */
105 #endif
106 #else
107 #define DLT_SLIP_BSDOS	15	/* BSD/OS Serial Line IP */
108 #define DLT_PPP_BSDOS	16	/* BSD/OS Point-to-point Protocol */
109 #endif
110 
111 /*
112  * 17 was used for DLT_PFLOG in OpenBSD; it no longer is.
113  *
114  * It was DLT_LANE8023 in SuSE 6.3, so we defined LINKTYPE_PFLOG
115  * as 117 so that pflog captures would use a link-layer header type
116  * value that didn't collide with any other values.  On all
117  * platforms other than OpenBSD, we defined DLT_PFLOG as 117,
118  * and we mapped between LINKTYPE_PFLOG and DLT_PFLOG.
119  *
120  * OpenBSD eventually switched to using 117 for DLT_PFLOG as well.
121  *
122  * Don't use 17 for anything else.
123  */
124 
125 /*
126  * 18 is used for DLT_PFSYNC in OpenBSD, NetBSD, DragonFly BSD and
127  * Mac OS X; don't use it for anything else.  (FreeBSD uses 121,
128  * which collides with DLT_HHDLC, even though it doesn't use 18
129  * for anything and doesn't appear to have ever used it for anything.)
130  *
131  * We define it as 18 on those platforms; it is, unfortunately, used
132  * for DLT_CIP in Suse 6.3, so we don't define it as DLT_PFSYNC
133  * in general.  As the packet format for it, like that for
134  * DLT_PFLOG, is not only OS-dependent but OS-version-dependent,
135  * we don't support printing it in tcpdump except on OSes that
136  * have the relevant header files, so it's not that useful on
137  * other platforms.
138  */
139 #if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__DragonFly__) || defined(__APPLE__)
140 #define DLT_PFSYNC	18
141 #endif
142 
143 #define DLT_ATM_CLIP	19	/* Linux Classical-IP over ATM */
144 
145 /*
146  * Apparently Redback uses this for its SmartEdge 400/800.  I hope
147  * nobody else decided to use it, too.
148  */
149 #define DLT_REDBACK_SMARTEDGE	32
150 
151 /*
152  * These values are defined by NetBSD; other platforms should refrain from
153  * using them for other purposes, so that NetBSD savefiles with link
154  * types of 50 or 51 can be read as this type on all platforms.
155  */
156 #define DLT_PPP_SERIAL	50	/* PPP over serial with HDLC encapsulation */
157 #define DLT_PPP_ETHER	51	/* PPP over Ethernet */
158 
159 /*
160  * The Axent Raptor firewall - now the Symantec Enterprise Firewall - uses
161  * a link-layer type of 99 for the tcpdump it supplies.  The link-layer
162  * header has 6 bytes of unknown data, something that appears to be an
163  * Ethernet type, and 36 bytes that appear to be 0 in at least one capture
164  * I've seen.
165  */
166 #define DLT_SYMANTEC_FIREWALL	99
167 
168 /*
169  * Values between 100 and 103 are used in capture file headers as
170  * link-layer header type LINKTYPE_ values corresponding to DLT_ types
171  * that differ between platforms; don't use those values for new DLT_
172  * new types.
173  */
174 
175 /*
176  * Values starting with 104 are used for newly-assigned link-layer
177  * header type values; for those link-layer header types, the DLT_
178  * value returned by pcap_datalink() and passed to pcap_open_dead(),
179  * and the LINKTYPE_ value that appears in capture files, are the
180  * same.
181  *
182  * DLT_MATCHING_MIN is the lowest such value; DLT_MATCHING_MAX is
183  * the highest such value.
184  */
185 #define DLT_MATCHING_MIN	104
186 
187 /*
188  * This value was defined by libpcap 0.5; platforms that have defined
189  * it with a different value should define it here with that value -
190  * a link type of 104 in a save file will be mapped to DLT_C_HDLC,
191  * whatever value that happens to be, so programs will correctly
192  * handle files with that link type regardless of the value of
193  * DLT_C_HDLC.
194  *
195  * The name DLT_C_HDLC was used by BSD/OS; we use that name for source
196  * compatibility with programs written for BSD/OS.
197  *
198  * libpcap 0.5 defined it as DLT_CHDLC; we define DLT_CHDLC as well,
199  * for source compatibility with programs written for libpcap 0.5.
200  */
201 #define DLT_C_HDLC	104	/* Cisco HDLC */
202 #define DLT_CHDLC	DLT_C_HDLC
203 
204 #define DLT_IEEE802_11	105	/* IEEE 802.11 wireless */
205 
206 /*
207  * 106 is reserved for Linux Classical IP over ATM; it's like DLT_RAW,
208  * except when it isn't.  (I.e., sometimes it's just raw IP, and
209  * sometimes it isn't.)  We currently handle it as DLT_LINUX_SLL,
210  * so that we don't have to worry about the link-layer header.)
211  */
212 
213 /*
214  * Frame Relay; BSD/OS has a DLT_FR with a value of 11, but that collides
215  * with other values.
216  * DLT_FR and DLT_FRELAY packets start with the Q.922 Frame Relay header
217  * (DLCI, etc.).
218  */
219 #define DLT_FRELAY	107
220 
221 /*
222  * OpenBSD DLT_LOOP, for loopback devices; it's like DLT_NULL, except
223  * that the AF_ type in the link-layer header is in network byte order.
224  *
225  * DLT_LOOP is 12 in OpenBSD, but that's DLT_RAW in other OSes, so
226  * we don't use 12 for it in OSes other than OpenBSD.
227  */
228 #ifdef __OpenBSD__
229 #define DLT_LOOP	12
230 #else
231 #define DLT_LOOP	108
232 #endif
233 
234 /*
235  * Encapsulated packets for IPsec; DLT_ENC is 13 in OpenBSD, but that's
236  * DLT_SLIP_BSDOS in NetBSD, so we don't use 13 for it in OSes other
237  * than OpenBSD.
238  */
239 #ifdef __OpenBSD__
240 #define DLT_ENC		13
241 #else
242 #define DLT_ENC		109
243 #endif
244 
245 /*
246  * Values between 110 and 112 are reserved for use in capture file headers
247  * as link-layer types corresponding to DLT_ types that might differ
248  * between platforms; don't use those values for new DLT_ types
249  * other than the corresponding DLT_ types.
250  */
251 
252 /*
253  * This is for Linux cooked sockets.
254  */
255 #define DLT_LINUX_SLL	113
256 
257 /*
258  * Apple LocalTalk hardware.
259  */
260 #define DLT_LTALK	114
261 
262 /*
263  * Acorn Econet.
264  */
265 #define DLT_ECONET	115
266 
267 /*
268  * Reserved for use with OpenBSD ipfilter.
269  */
270 #define DLT_IPFILTER	116
271 
272 /*
273  * OpenBSD DLT_PFLOG.
274  */
275 #define DLT_PFLOG	117
276 
277 /*
278  * Registered for Cisco-internal use.
279  */
280 #define DLT_CISCO_IOS	118
281 
282 /*
283  * For 802.11 cards using the Prism II chips, with a link-layer
284  * header including Prism monitor mode information plus an 802.11
285  * header.
286  */
287 #define DLT_PRISM_HEADER	119
288 
289 /*
290  * Reserved for Aironet 802.11 cards, with an Aironet link-layer header
291  * (see Doug Ambrisko's FreeBSD patches).
292  */
293 #define DLT_AIRONET_HEADER	120
294 
295 /*
296  * Sigh.
297  *
298  * 121 was reserved for Siemens HiPath HDLC on 2002-01-25, as
299  * requested by Tomas Kukosa.
300  *
301  * On 2004-02-25, a FreeBSD checkin to sys/net/bpf.h was made that
302  * assigned 121 as DLT_PFSYNC.  In current versions, its libpcap
303  * does DLT_ <-> LINKTYPE_ mapping, mapping DLT_PFSYNC to a
304  * LINKTYPE_PFSYNC value of 246, so it should write out DLT_PFSYNC
305  * dump files with 246 as the link-layer header type.  (Earlier
306  * versions might not have done mapping, in which case they would
307  * have written them out with a link-layer header type of 121.)
308  *
309  * OpenBSD, from which pf came, however, uses 18 for DLT_PFSYNC;
310  * its libpcap does no DLT_ <-> LINKTYPE_ mapping, so it would
311  * write out DLT_PFSYNC dump files with use 18 as the link-layer
312  * header type.
313  *
314  * NetBSD, DragonFly BSD, and Darwin also use 18 for DLT_PFSYNC; in
315  * current versions, their libpcaps do DLT_ <-> LINKTYPE_ mapping,
316  * mapping DLT_PFSYNC to a LINKTYPE_PFSYNC value of 246, so they
317  * should write out DLT_PFSYNC dump files with 246 as the link-layer
318  * header type.  (Earlier versions might not have done mapping,
319  * in which case they'd work the same way OpenBSD does, writing
320  * them out with a link-layer header type of 18.)
321  *
322  * We'll define DLT_PFSYNC as:
323  *
324  *    18 on NetBSD, OpenBSD, DragonFly BSD, and Darwin;
325  *
326  *    121 on FreeBSD;
327  *
328  *    246 everywhere else.
329  *
330  * We'll define DLT_HHDLC as 121 on everything except for FreeBSD;
331  * anybody who wants to compile, on FreeBSD, code that uses DLT_HHDLC
332  * is out of luck.
333  *
334  * We'll define LINKTYPE_PFSYNC as 246 on *all* platforms, so that
335  * savefiles written using *this* code won't use 18 or 121 for PFSYNC,
336  * they'll all use 246.
337  *
338  * Code that uses pcap_datalink() to determine the link-layer header
339  * type of a savefile won't, when built and run on FreeBSD, be able
340  * to distinguish between LINKTYPE_PFSYNC and LINKTYPE_HHDLC capture
341  * files, as pcap_datalink() will give 121 for both of them.  Code
342  * that doesn't, such as the code in Wireshark, will be able to
343  * distinguish between them.
344  *
345  * FreeBSD's libpcap won't map a link-layer header type of 18 - i.e.,
346  * DLT_PFSYNC files from OpenBSD and possibly older versions of NetBSD,
347  * DragonFly BSD, and OS X - to DLT_PFSYNC, so code built with FreeBSD's
348  * libpcap won't treat those files as DLT_PFSYNC files.
349  *
350  * Other libpcaps won't map a link-layer header type of 121 to DLT_PFSYNC;
351  * this means they can read DLT_HHDLC files, if any exist, but won't
352  * treat pcap files written by any older versions of FreeBSD libpcap that
353  * didn't map to 246 as DLT_PFSYNC files.
354  */
355 #ifdef __FreeBSD__
356 #define DLT_PFSYNC		121
357 #else
358 #define DLT_HHDLC		121
359 #endif
360 
361 /*
362  * This is for RFC 2625 IP-over-Fibre Channel.
363  *
364  * This is not for use with raw Fibre Channel, where the link-layer
365  * header starts with a Fibre Channel frame header; it's for IP-over-FC,
366  * where the link-layer header starts with an RFC 2625 Network_Header
367  * field.
368  */
369 #define DLT_IP_OVER_FC		122
370 
371 /*
372  * This is for Full Frontal ATM on Solaris with SunATM, with a
373  * pseudo-header followed by an AALn PDU.
374  *
375  * There may be other forms of Full Frontal ATM on other OSes,
376  * with different pseudo-headers.
377  *
378  * If ATM software returns a pseudo-header with VPI/VCI information
379  * (and, ideally, packet type information, e.g. signalling, ILMI,
380  * LANE, LLC-multiplexed traffic, etc.), it should not use
381  * DLT_ATM_RFC1483, but should get a new DLT_ value, so tcpdump
382  * and the like don't have to infer the presence or absence of a
383  * pseudo-header and the form of the pseudo-header.
384  */
385 #define DLT_SUNATM		123	/* Solaris+SunATM */
386 
387 /*
388  * Reserved as per request from Kent Dahlgren <kent@praesum.com>
389  * for private use.
390  */
391 #define DLT_RIO                 124     /* RapidIO */
392 #define DLT_PCI_EXP             125     /* PCI Express */
393 #define DLT_AURORA              126     /* Xilinx Aurora link layer */
394 
395 /*
396  * Header for 802.11 plus a number of bits of link-layer information
397  * including radio information, used by some recent BSD drivers as
398  * well as the madwifi Atheros driver for Linux.
399  */
400 #define DLT_IEEE802_11_RADIO	127	/* 802.11 plus radiotap radio header */
401 
402 /*
403  * Reserved for the TZSP encapsulation, as per request from
404  * Chris Waters <chris.waters@networkchemistry.com>
405  * TZSP is a generic encapsulation for any other link type,
406  * which includes a means to include meta-information
407  * with the packet, e.g. signal strength and channel
408  * for 802.11 packets.
409  */
410 #define DLT_TZSP                128     /* Tazmen Sniffer Protocol */
411 
412 /*
413  * BSD's ARCNET headers have the source host, destination host,
414  * and type at the beginning of the packet; that's what's handed
415  * up to userland via BPF.
416  *
417  * Linux's ARCNET headers, however, have a 2-byte offset field
418  * between the host IDs and the type; that's what's handed up
419  * to userland via PF_PACKET sockets.
420  *
421  * We therefore have to have separate DLT_ values for them.
422  */
423 #define DLT_ARCNET_LINUX	129	/* ARCNET */
424 
425 /*
426  * Juniper-private data link types, as per request from
427  * Hannes Gredler <hannes@juniper.net>.  The DLT_s are used
428  * for passing on chassis-internal metainformation such as
429  * QOS profiles, etc..
430  */
431 #define DLT_JUNIPER_MLPPP       130
432 #define DLT_JUNIPER_MLFR        131
433 #define DLT_JUNIPER_ES          132
434 #define DLT_JUNIPER_GGSN        133
435 #define DLT_JUNIPER_MFR         134
436 #define DLT_JUNIPER_ATM2        135
437 #define DLT_JUNIPER_SERVICES    136
438 #define DLT_JUNIPER_ATM1        137
439 
440 /*
441  * Apple IP-over-IEEE 1394, as per a request from Dieter Siegmund
442  * <dieter@apple.com>.  The header that's presented is an Ethernet-like
443  * header:
444  *
445  *	#define FIREWIRE_EUI64_LEN	8
446  *	struct firewire_header {
447  *		u_char  firewire_dhost[FIREWIRE_EUI64_LEN];
448  *		u_char  firewire_shost[FIREWIRE_EUI64_LEN];
449  *		u_short firewire_type;
450  *	};
451  *
452  * with "firewire_type" being an Ethernet type value, rather than,
453  * for example, raw GASP frames being handed up.
454  */
455 #define DLT_APPLE_IP_OVER_IEEE1394	138
456 
457 /*
458  * Various SS7 encapsulations, as per a request from Jeff Morriss
459  * <jeff.morriss[AT]ulticom.com> and subsequent discussions.
460  */
461 #define DLT_MTP2_WITH_PHDR	139	/* pseudo-header with various info, followed by MTP2 */
462 #define DLT_MTP2		140	/* MTP2, without pseudo-header */
463 #define DLT_MTP3		141	/* MTP3, without pseudo-header or MTP2 */
464 #define DLT_SCCP		142	/* SCCP, without pseudo-header or MTP2 or MTP3 */
465 
466 /*
467  * DOCSIS MAC frames.
468  */
469 #define DLT_DOCSIS		143
470 
471 /*
472  * Linux-IrDA packets. Protocol defined at http://www.irda.org.
473  * Those packets include IrLAP headers and above (IrLMP...), but
474  * don't include Phy framing (SOF/EOF/CRC & byte stuffing), because Phy
475  * framing can be handled by the hardware and depend on the bitrate.
476  * This is exactly the format you would get capturing on a Linux-IrDA
477  * interface (irdaX), but not on a raw serial port.
478  * Note the capture is done in "Linux-cooked" mode, so each packet include
479  * a fake packet header (struct sll_header). This is because IrDA packet
480  * decoding is dependant on the direction of the packet (incomming or
481  * outgoing).
482  * When/if other platform implement IrDA capture, we may revisit the
483  * issue and define a real DLT_IRDA...
484  * Jean II
485  */
486 #define DLT_LINUX_IRDA		144
487 
488 /*
489  * Reserved for IBM SP switch and IBM Next Federation switch.
490  */
491 #define DLT_IBM_SP		145
492 #define DLT_IBM_SN		146
493 
494 /*
495  * Reserved for private use.  If you have some link-layer header type
496  * that you want to use within your organization, with the capture files
497  * using that link-layer header type not ever be sent outside your
498  * organization, you can use these values.
499  *
500  * No libpcap release will use these for any purpose, nor will any
501  * tcpdump release use them, either.
502  *
503  * Do *NOT* use these in capture files that you expect anybody not using
504  * your private versions of capture-file-reading tools to read; in
505  * particular, do *NOT* use them in products, otherwise you may find that
506  * people won't be able to use tcpdump, or snort, or Ethereal, or... to
507  * read capture files from your firewall/intrusion detection/traffic
508  * monitoring/etc. appliance, or whatever product uses that DLT_ value,
509  * and you may also find that the developers of those applications will
510  * not accept patches to let them read those files.
511  *
512  * Also, do not use them if somebody might send you a capture using them
513  * for *their* private type and tools using them for *your* private type
514  * would have to read them.
515  *
516  * Instead, ask "tcpdump-workers@lists.tcpdump.org" for a new DLT_ value,
517  * as per the comment above, and use the type you're given.
518  */
519 #define DLT_USER0		147
520 #define DLT_USER1		148
521 #define DLT_USER2		149
522 #define DLT_USER3		150
523 #define DLT_USER4		151
524 #define DLT_USER5		152
525 #define DLT_USER6		153
526 #define DLT_USER7		154
527 #define DLT_USER8		155
528 #define DLT_USER9		156
529 #define DLT_USER10		157
530 #define DLT_USER11		158
531 #define DLT_USER12		159
532 #define DLT_USER13		160
533 #define DLT_USER14		161
534 #define DLT_USER15		162
535 
536 /*
537  * For future use with 802.11 captures - defined by AbsoluteValue
538  * Systems to store a number of bits of link-layer information
539  * including radio information:
540  *
541  *	http://www.shaftnet.org/~pizza/software/capturefrm.txt
542  *
543  * but it might be used by some non-AVS drivers now or in the
544  * future.
545  */
546 #define DLT_IEEE802_11_RADIO_AVS 163	/* 802.11 plus AVS radio header */
547 
548 /*
549  * Juniper-private data link type, as per request from
550  * Hannes Gredler <hannes@juniper.net>.  The DLT_s are used
551  * for passing on chassis-internal metainformation such as
552  * QOS profiles, etc..
553  */
554 #define DLT_JUNIPER_MONITOR     164
555 
556 /*
557  * BACnet MS/TP frames.
558  */
559 #define DLT_BACNET_MS_TP	165
560 
561 /*
562  * Another PPP variant as per request from Karsten Keil <kkeil@suse.de>.
563  *
564  * This is used in some OSes to allow a kernel socket filter to distinguish
565  * between incoming and outgoing packets, on a socket intended to
566  * supply pppd with outgoing packets so it can do dial-on-demand and
567  * hangup-on-lack-of-demand; incoming packets are filtered out so they
568  * don't cause pppd to hold the connection up (you don't want random
569  * input packets such as port scans, packets from old lost connections,
570  * etc. to force the connection to stay up).
571  *
572  * The first byte of the PPP header (0xff03) is modified to accomodate
573  * the direction - 0x00 = IN, 0x01 = OUT.
574  */
575 #define DLT_PPP_PPPD		166
576 
577 /*
578  * Names for backwards compatibility with older versions of some PPP
579  * software; new software should use DLT_PPP_PPPD.
580  */
581 #define DLT_PPP_WITH_DIRECTION	DLT_PPP_PPPD
582 #define DLT_LINUX_PPP_WITHDIRECTION	DLT_PPP_PPPD
583 
584 /*
585  * Juniper-private data link type, as per request from
586  * Hannes Gredler <hannes@juniper.net>.  The DLT_s are used
587  * for passing on chassis-internal metainformation such as
588  * QOS profiles, cookies, etc..
589  */
590 #define DLT_JUNIPER_PPPOE       167
591 #define DLT_JUNIPER_PPPOE_ATM   168
592 
593 #define DLT_GPRS_LLC		169	/* GPRS LLC */
594 #define DLT_GPF_T		170	/* GPF-T (ITU-T G.7041/Y.1303) */
595 #define DLT_GPF_F		171	/* GPF-F (ITU-T G.7041/Y.1303) */
596 
597 /*
598  * Requested by Oolan Zimmer <oz@gcom.com> for use in Gcom's T1/E1 line
599  * monitoring equipment.
600  */
601 #define DLT_GCOM_T1E1		172
602 #define DLT_GCOM_SERIAL		173
603 
604 /*
605  * Juniper-private data link type, as per request from
606  * Hannes Gredler <hannes@juniper.net>.  The DLT_ is used
607  * for internal communication to Physical Interface Cards (PIC)
608  */
609 #define DLT_JUNIPER_PIC_PEER    174
610 
611 /*
612  * Link types requested by Gregor Maier <gregor@endace.com> of Endace
613  * Measurement Systems.  They add an ERF header (see
614  * http://www.endace.com/support/EndaceRecordFormat.pdf) in front of
615  * the link-layer header.
616  */
617 #define DLT_ERF_ETH		175	/* Ethernet */
618 #define DLT_ERF_POS		176	/* Packet-over-SONET */
619 
620 /*
621  * Requested by Daniele Orlandi <daniele@orlandi.com> for raw LAPD
622  * for vISDN (http://www.orlandi.com/visdn/).  Its link-layer header
623  * includes additional information before the LAPD header, so it's
624  * not necessarily a generic LAPD header.
625  */
626 #define DLT_LINUX_LAPD		177
627 
628 /*
629  * Juniper-private data link type, as per request from
630  * Hannes Gredler <hannes@juniper.net>.
631  * The DLT_ are used for prepending meta-information
632  * like interface index, interface name
633  * before standard Ethernet, PPP, Frelay & C-HDLC Frames
634  */
635 #define DLT_JUNIPER_ETHER       178
636 #define DLT_JUNIPER_PPP         179
637 #define DLT_JUNIPER_FRELAY      180
638 #define DLT_JUNIPER_CHDLC       181
639 
640 /*
641  * Multi Link Frame Relay (FRF.16)
642  */
643 #define DLT_MFR                 182
644 
645 /*
646  * Juniper-private data link type, as per request from
647  * Hannes Gredler <hannes@juniper.net>.
648  * The DLT_ is used for internal communication with a
649  * voice Adapter Card (PIC)
650  */
651 #define DLT_JUNIPER_VP          183
652 
653 /*
654  * Arinc 429 frames.
655  * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>.
656  * Every frame contains a 32bit A429 label.
657  * More documentation on Arinc 429 can be found at
658  * http://www.condoreng.com/support/downloads/tutorials/ARINCTutorial.pdf
659  */
660 #define DLT_A429                184
661 
662 /*
663  * Arinc 653 Interpartition Communication messages.
664  * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>.
665  * Please refer to the A653-1 standard for more information.
666  */
667 #define DLT_A653_ICM            185
668 
669 /*
670  * This used to be "USB packets, beginning with a USB setup header;
671  * requested by Paolo Abeni <paolo.abeni@email.it>."
672  *
673  * However, that header didn't work all that well - it left out some
674  * useful information - and was abandoned in favor of the DLT_USB_LINUX
675  * header.
676  *
677  * This is now used by FreeBSD for its BPF taps for USB; that has its
678  * own headers.  So it is written, so it is done.
679  *
680  * For source-code compatibility, we also define DLT_USB to have this
681  * value.  We do it numerically so that, if code that includes this
682  * file (directly or indirectly) also includes an OS header that also
683  * defines DLT_USB as 186, we don't get a redefinition warning.
684  * (NetBSD 7 does that.)
685  */
686 #define DLT_USB_FREEBSD		186
687 #define DLT_USB			186
688 
689 /*
690  * Bluetooth HCI UART transport layer (part H:4); requested by
691  * Paolo Abeni.
692  */
693 #define DLT_BLUETOOTH_HCI_H4	187
694 
695 /*
696  * IEEE 802.16 MAC Common Part Sublayer; requested by Maria Cruz
697  * <cruz_petagay@bah.com>.
698  */
699 #define DLT_IEEE802_16_MAC_CPS	188
700 
701 /*
702  * USB packets, beginning with a Linux USB header; requested by
703  * Paolo Abeni <paolo.abeni@email.it>.
704  */
705 #define DLT_USB_LINUX		189
706 
707 /*
708  * Controller Area Network (CAN) v. 2.0B packets.
709  * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>.
710  * Used to dump CAN packets coming from a CAN Vector board.
711  * More documentation on the CAN v2.0B frames can be found at
712  * http://www.can-cia.org/downloads/?269
713  */
714 #define DLT_CAN20B              190
715 
716 /*
717  * IEEE 802.15.4, with address fields padded, as is done by Linux
718  * drivers; requested by Juergen Schimmer.
719  */
720 #define DLT_IEEE802_15_4_LINUX	191
721 
722 /*
723  * Per Packet Information encapsulated packets.
724  * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>.
725  */
726 #define DLT_PPI			192
727 
728 /*
729  * Header for 802.16 MAC Common Part Sublayer plus a radiotap radio header;
730  * requested by Charles Clancy.
731  */
732 #define DLT_IEEE802_16_MAC_CPS_RADIO	193
733 
734 /*
735  * Juniper-private data link type, as per request from
736  * Hannes Gredler <hannes@juniper.net>.
737  * The DLT_ is used for internal communication with a
738  * integrated service module (ISM).
739  */
740 #define DLT_JUNIPER_ISM         194
741 
742 /*
743  * IEEE 802.15.4, exactly as it appears in the spec (no padding, no
744  * nothing); requested by Mikko Saarnivala <mikko.saarnivala@sensinode.com>.
745  * For this one, we expect the FCS to be present at the end of the frame;
746  * if the frame has no FCS, DLT_IEEE802_15_4_NOFCS should be used.
747  */
748 #define DLT_IEEE802_15_4	195
749 
750 /*
751  * Various link-layer types, with a pseudo-header, for SITA
752  * (http://www.sita.aero/); requested by Fulko Hew (fulko.hew@gmail.com).
753  */
754 #define DLT_SITA		196
755 
756 /*
757  * Various link-layer types, with a pseudo-header, for Endace DAG cards;
758  * encapsulates Endace ERF records.  Requested by Stephen Donnelly
759  * <stephen@endace.com>.
760  */
761 #define DLT_ERF			197
762 
763 /*
764  * Special header prepended to Ethernet packets when capturing from a
765  * u10 Networks board.  Requested by Phil Mulholland
766  * <phil@u10networks.com>.
767  */
768 #define DLT_RAIF1		198
769 
770 /*
771  * IPMB packet for IPMI, beginning with the I2C slave address, followed
772  * by the netFn and LUN, etc..  Requested by Chanthy Toeung
773  * <chanthy.toeung@ca.kontron.com>.
774  */
775 #define DLT_IPMB		199
776 
777 /*
778  * Juniper-private data link type, as per request from
779  * Hannes Gredler <hannes@juniper.net>.
780  * The DLT_ is used for capturing data on a secure tunnel interface.
781  */
782 #define DLT_JUNIPER_ST          200
783 
784 /*
785  * Bluetooth HCI UART transport layer (part H:4), with pseudo-header
786  * that includes direction information; requested by Paolo Abeni.
787  */
788 #define DLT_BLUETOOTH_HCI_H4_WITH_PHDR	201
789 
790 /*
791  * AX.25 packet with a 1-byte KISS header; see
792  *
793  *	http://www.ax25.net/kiss.htm
794  *
795  * as per Richard Stearn <richard@rns-stearn.demon.co.uk>.
796  */
797 #define DLT_AX25_KISS		202
798 
799 /*
800  * LAPD packets from an ISDN channel, starting with the address field,
801  * with no pseudo-header.
802  * Requested by Varuna De Silva <varunax@gmail.com>.
803  */
804 #define DLT_LAPD		203
805 
806 /*
807  * Variants of various link-layer headers, with a one-byte direction
808  * pseudo-header prepended - zero means "received by this host",
809  * non-zero (any non-zero value) means "sent by this host" - as per
810  * Will Barker <w.barker@zen.co.uk>.
811  */
812 #define DLT_PPP_WITH_DIR	204	/* PPP - don't confuse with DLT_PPP_WITH_DIRECTION */
813 #define DLT_C_HDLC_WITH_DIR	205	/* Cisco HDLC */
814 #define DLT_FRELAY_WITH_DIR	206	/* Frame Relay */
815 #define DLT_LAPB_WITH_DIR	207	/* LAPB */
816 
817 /*
818  * 208 is reserved for an as-yet-unspecified proprietary link-layer
819  * type, as requested by Will Barker.
820  */
821 
822 /*
823  * IPMB with a Linux-specific pseudo-header; as requested by Alexey Neyman
824  * <avn@pigeonpoint.com>.
825  */
826 #define DLT_IPMB_LINUX		209
827 
828 /*
829  * FlexRay automotive bus - http://www.flexray.com/ - as requested
830  * by Hannes Kaelber <hannes.kaelber@x2e.de>.
831  */
832 #define DLT_FLEXRAY		210
833 
834 /*
835  * Media Oriented Systems Transport (MOST) bus for multimedia
836  * transport - http://www.mostcooperation.com/ - as requested
837  * by Hannes Kaelber <hannes.kaelber@x2e.de>.
838  */
839 #define DLT_MOST		211
840 
841 /*
842  * Local Interconnect Network (LIN) bus for vehicle networks -
843  * http://www.lin-subbus.org/ - as requested by Hannes Kaelber
844  * <hannes.kaelber@x2e.de>.
845  */
846 #define DLT_LIN			212
847 
848 /*
849  * X2E-private data link type used for serial line capture,
850  * as requested by Hannes Kaelber <hannes.kaelber@x2e.de>.
851  */
852 #define DLT_X2E_SERIAL		213
853 
854 /*
855  * X2E-private data link type used for the Xoraya data logger
856  * family, as requested by Hannes Kaelber <hannes.kaelber@x2e.de>.
857  */
858 #define DLT_X2E_XORAYA		214
859 
860 /*
861  * IEEE 802.15.4, exactly as it appears in the spec (no padding, no
862  * nothing), but with the PHY-level data for non-ASK PHYs (4 octets
863  * of 0 as preamble, one octet of SFD, one octet of frame length+
864  * reserved bit, and then the MAC-layer data, starting with the
865  * frame control field).
866  *
867  * Requested by Max Filippov <jcmvbkbc@gmail.com>.
868  */
869 #define DLT_IEEE802_15_4_NONASK_PHY	215
870 
871 /*
872  * David Gibson <david@gibson.dropbear.id.au> requested this for
873  * captures from the Linux kernel /dev/input/eventN devices. This
874  * is used to communicate keystrokes and mouse movements from the
875  * Linux kernel to display systems, such as Xorg.
876  */
877 #define DLT_LINUX_EVDEV		216
878 
879 /*
880  * GSM Um and Abis interfaces, preceded by a "gsmtap" header.
881  *
882  * Requested by Harald Welte <laforge@gnumonks.org>.
883  */
884 #define DLT_GSMTAP_UM		217
885 #define DLT_GSMTAP_ABIS		218
886 
887 /*
888  * MPLS, with an MPLS label as the link-layer header.
889  * Requested by Michele Marchetto <michele@openbsd.org> on behalf
890  * of OpenBSD.
891  */
892 #define DLT_MPLS		219
893 
894 /*
895  * USB packets, beginning with a Linux USB header, with the USB header
896  * padded to 64 bytes; required for memory-mapped access.
897  */
898 #define DLT_USB_LINUX_MMAPPED	220
899 
900 /*
901  * DECT packets, with a pseudo-header; requested by
902  * Matthias Wenzel <tcpdump@mazzoo.de>.
903  */
904 #define DLT_DECT		221
905 
906 /*
907  * From: "Lidwa, Eric (GSFC-582.0)[SGT INC]" <eric.lidwa-1@nasa.gov>
908  * Date: Mon, 11 May 2009 11:18:30 -0500
909  *
910  * DLT_AOS. We need it for AOS Space Data Link Protocol.
911  *   I have already written dissectors for but need an OK from
912  *   legal before I can submit a patch.
913  *
914  */
915 #define DLT_AOS                 222
916 
917 /*
918  * Wireless HART (Highway Addressable Remote Transducer)
919  * From the HART Communication Foundation
920  * IES/PAS 62591
921  *
922  * Requested by Sam Roberts <vieuxtech@gmail.com>.
923  */
924 #define DLT_WIHART		223
925 
926 /*
927  * Fibre Channel FC-2 frames, beginning with a Frame_Header.
928  * Requested by Kahou Lei <kahou82@gmail.com>.
929  */
930 #define DLT_FC_2		224
931 
932 /*
933  * Fibre Channel FC-2 frames, beginning with an encoding of the
934  * SOF, and ending with an encoding of the EOF.
935  *
936  * The encodings represent the frame delimiters as 4-byte sequences
937  * representing the corresponding ordered sets, with K28.5
938  * represented as 0xBC, and the D symbols as the corresponding
939  * byte values; for example, SOFi2, which is K28.5 - D21.5 - D1.2 - D21.2,
940  * is represented as 0xBC 0xB5 0x55 0x55.
941  *
942  * Requested by Kahou Lei <kahou82@gmail.com>.
943  */
944 #define DLT_FC_2_WITH_FRAME_DELIMS	225
945 
946 /*
947  * Solaris ipnet pseudo-header; requested by Darren Reed <Darren.Reed@Sun.COM>.
948  *
949  * The pseudo-header starts with a one-byte version number; for version 2,
950  * the pseudo-header is:
951  *
952  * struct dl_ipnetinfo {
953  *     u_int8_t   dli_version;
954  *     u_int8_t   dli_family;
955  *     u_int16_t  dli_htype;
956  *     u_int32_t  dli_pktlen;
957  *     u_int32_t  dli_ifindex;
958  *     u_int32_t  dli_grifindex;
959  *     u_int32_t  dli_zsrc;
960  *     u_int32_t  dli_zdst;
961  * };
962  *
963  * dli_version is 2 for the current version of the pseudo-header.
964  *
965  * dli_family is a Solaris address family value, so it's 2 for IPv4
966  * and 26 for IPv6.
967  *
968  * dli_htype is a "hook type" - 0 for incoming packets, 1 for outgoing
969  * packets, and 2 for packets arriving from another zone on the same
970  * machine.
971  *
972  * dli_pktlen is the length of the packet data following the pseudo-header
973  * (so the captured length minus dli_pktlen is the length of the
974  * pseudo-header, assuming the entire pseudo-header was captured).
975  *
976  * dli_ifindex is the interface index of the interface on which the
977  * packet arrived.
978  *
979  * dli_grifindex is the group interface index number (for IPMP interfaces).
980  *
981  * dli_zsrc is the zone identifier for the source of the packet.
982  *
983  * dli_zdst is the zone identifier for the destination of the packet.
984  *
985  * A zone number of 0 is the global zone; a zone number of 0xffffffff
986  * means that the packet arrived from another host on the network, not
987  * from another zone on the same machine.
988  *
989  * An IPv4 or IPv6 datagram follows the pseudo-header; dli_family indicates
990  * which of those it is.
991  */
992 #define DLT_IPNET		226
993 
994 /*
995  * CAN (Controller Area Network) frames, with a pseudo-header as supplied
996  * by Linux SocketCAN, and with multi-byte numerical fields in that header
997  * in big-endian byte order.
998  *
999  * See Documentation/networking/can.txt in the Linux source.
1000  *
1001  * Requested by Felix Obenhuber <felix@obenhuber.de>.
1002  */
1003 #define DLT_CAN_SOCKETCAN	227
1004 
1005 /*
1006  * Raw IPv4/IPv6; different from DLT_RAW in that the DLT_ value specifies
1007  * whether it's v4 or v6.  Requested by Darren Reed <Darren.Reed@Sun.COM>.
1008  */
1009 #define DLT_IPV4		228
1010 #define DLT_IPV6		229
1011 
1012 /*
1013  * IEEE 802.15.4, exactly as it appears in the spec (no padding, no
1014  * nothing), and with no FCS at the end of the frame; requested by
1015  * Jon Smirl <jonsmirl@gmail.com>.
1016  */
1017 #define DLT_IEEE802_15_4_NOFCS	230
1018 
1019 /*
1020  * Raw D-Bus:
1021  *
1022  *	http://www.freedesktop.org/wiki/Software/dbus
1023  *
1024  * messages:
1025  *
1026  *	http://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-messages
1027  *
1028  * starting with the endianness flag, followed by the message type, etc.,
1029  * but without the authentication handshake before the message sequence:
1030  *
1031  *	http://dbus.freedesktop.org/doc/dbus-specification.html#auth-protocol
1032  *
1033  * Requested by Martin Vidner <martin@vidner.net>.
1034  */
1035 #define DLT_DBUS		231
1036 
1037 /*
1038  * Juniper-private data link type, as per request from
1039  * Hannes Gredler <hannes@juniper.net>.
1040  */
1041 #define DLT_JUNIPER_VS			232
1042 #define DLT_JUNIPER_SRX_E2E		233
1043 #define DLT_JUNIPER_FIBRECHANNEL	234
1044 
1045 /*
1046  * DVB-CI (DVB Common Interface for communication between a PC Card
1047  * module and a DVB receiver).  See
1048  *
1049  *	http://www.kaiser.cx/pcap-dvbci.html
1050  *
1051  * for the specification.
1052  *
1053  * Requested by Martin Kaiser <martin@kaiser.cx>.
1054  */
1055 #define DLT_DVB_CI		235
1056 
1057 /*
1058  * Variant of 3GPP TS 27.010 multiplexing protocol (similar to, but
1059  * *not* the same as, 27.010).  Requested by Hans-Christoph Schemmel
1060  * <hans-christoph.schemmel@cinterion.com>.
1061  */
1062 #define DLT_MUX27010		236
1063 
1064 /*
1065  * STANAG 5066 D_PDUs.  Requested by M. Baris Demiray
1066  * <barisdemiray@gmail.com>.
1067  */
1068 #define DLT_STANAG_5066_D_PDU	237
1069 
1070 /*
1071  * Juniper-private data link type, as per request from
1072  * Hannes Gredler <hannes@juniper.net>.
1073  */
1074 #define DLT_JUNIPER_ATM_CEMIC	238
1075 
1076 /*
1077  * NetFilter LOG messages
1078  * (payload of netlink NFNL_SUBSYS_ULOG/NFULNL_MSG_PACKET packets)
1079  *
1080  * Requested by Jakub Zawadzki <darkjames-ws@darkjames.pl>
1081  */
1082 #define DLT_NFLOG		239
1083 
1084 /*
1085  * Hilscher Gesellschaft fuer Systemautomation mbH link-layer type
1086  * for Ethernet packets with a 4-byte pseudo-header and always
1087  * with the payload including the FCS, as supplied by their
1088  * netANALYZER hardware and software.
1089  *
1090  * Requested by Holger P. Frommer <HPfrommer@hilscher.com>
1091  */
1092 #define DLT_NETANALYZER		240
1093 
1094 /*
1095  * Hilscher Gesellschaft fuer Systemautomation mbH link-layer type
1096  * for Ethernet packets with a 4-byte pseudo-header and FCS and
1097  * with the Ethernet header preceded by 7 bytes of preamble and
1098  * 1 byte of SFD, as supplied by their netANALYZER hardware and
1099  * software.
1100  *
1101  * Requested by Holger P. Frommer <HPfrommer@hilscher.com>
1102  */
1103 #define DLT_NETANALYZER_TRANSPARENT	241
1104 
1105 /*
1106  * IP-over-InfiniBand, as specified by RFC 4391.
1107  *
1108  * Requested by Petr Sumbera <petr.sumbera@oracle.com>.
1109  */
1110 #define DLT_IPOIB		242
1111 
1112 /*
1113  * MPEG-2 transport stream (ISO 13818-1/ITU-T H.222.0).
1114  *
1115  * Requested by Guy Martin <gmsoft@tuxicoman.be>.
1116  */
1117 #define DLT_MPEG_2_TS		243
1118 
1119 /*
1120  * ng4T GmbH's UMTS Iub/Iur-over-ATM and Iub/Iur-over-IP format as
1121  * used by their ng40 protocol tester.
1122  *
1123  * Requested by Jens Grimmer <jens.grimmer@ng4t.com>.
1124  */
1125 #define DLT_NG40		244
1126 
1127 /*
1128  * Pseudo-header giving adapter number and flags, followed by an NFC
1129  * (Near-Field Communications) Logical Link Control Protocol (LLCP) PDU,
1130  * as specified by NFC Forum Logical Link Control Protocol Technical
1131  * Specification LLCP 1.1.
1132  *
1133  * Requested by Mike Wakerly <mikey@google.com>.
1134  */
1135 #define DLT_NFC_LLCP		245
1136 
1137 /*
1138  * 246 is used as LINKTYPE_PFSYNC; do not use it for any other purpose.
1139  *
1140  * DLT_PFSYNC has different values on different platforms, and all of
1141  * them collide with something used elsewhere.  On platforms that
1142  * don't already define it, define it as 246.
1143  */
1144 #if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__) && !defined(__DragonFly__) && !defined(__APPLE__)
1145 #define DLT_PFSYNC		246
1146 #endif
1147 
1148 /*
1149  * Raw InfiniBand packets, starting with the Local Routing Header.
1150  *
1151  * Requested by Oren Kladnitsky <orenk@mellanox.com>.
1152  */
1153 #define DLT_INFINIBAND		247
1154 
1155 /*
1156  * SCTP, with no lower-level protocols (i.e., no IPv4 or IPv6).
1157  *
1158  * Requested by Michael Tuexen <Michael.Tuexen@lurchi.franken.de>.
1159  */
1160 #define DLT_SCTP		248
1161 
1162 /*
1163  * USB packets, beginning with a USBPcap header.
1164  *
1165  * Requested by Tomasz Mon <desowin@gmail.com>
1166  */
1167 #define DLT_USBPCAP		249
1168 
1169 /*
1170  * Schweitzer Engineering Laboratories "RTAC" product serial-line
1171  * packets.
1172  *
1173  * Requested by Chris Bontje <chris_bontje@selinc.com>.
1174  */
1175 #define DLT_RTAC_SERIAL		250
1176 
1177 /*
1178  * Bluetooth Low Energy air interface link-layer packets.
1179  *
1180  * Requested by Mike Kershaw <dragorn@kismetwireless.net>.
1181  */
1182 #define DLT_BLUETOOTH_LE_LL	251
1183 
1184 /*
1185  * DLT type for upper-protocol layer PDU saves from wireshark.
1186  *
1187  * the actual contents are determined by two TAGs stored with each
1188  * packet:
1189  *   EXP_PDU_TAG_LINKTYPE          the link type (LINKTYPE_ value) of the
1190  *				   original packet.
1191  *
1192  *   EXP_PDU_TAG_PROTO_NAME        the name of the wireshark dissector
1193  * 				   that can make sense of the data stored.
1194  */
1195 #define DLT_WIRESHARK_UPPER_PDU	252
1196 
1197 /*
1198  * DLT type for the netlink protocol (nlmon devices).
1199  */
1200 #define DLT_NETLINK		253
1201 
1202 /*
1203  * Bluetooth Linux Monitor headers for the BlueZ stack.
1204  */
1205 #define DLT_BLUETOOTH_LINUX_MONITOR	254
1206 
1207 /*
1208  * Bluetooth Basic Rate/Enhanced Data Rate baseband packets, as
1209  * captured by Ubertooth.
1210  */
1211 #define DLT_BLUETOOTH_BREDR_BB	255
1212 
1213 /*
1214  * Bluetooth Low Energy link layer packets, as captured by Ubertooth.
1215  */
1216 #define DLT_BLUETOOTH_LE_LL_WITH_PHDR	256
1217 
1218 /*
1219  * PROFIBUS data link layer.
1220  */
1221 #define DLT_PROFIBUS_DL		257
1222 
1223 /*
1224  * Apple's DLT_PKTAP headers.
1225  *
1226  * Sadly, the folks at Apple either had no clue that the DLT_USERn values
1227  * are for internal use within an organization and partners only, and
1228  * didn't know that the right way to get a link-layer header type is to
1229  * ask tcpdump.org for one, or knew and didn't care, so they just
1230  * used DLT_USER2, which causes problems for everything except for
1231  * their version of tcpdump.
1232  *
1233  * So I'll just give them one; hopefully this will show up in a
1234  * libpcap release in time for them to get this into 10.10 Big Sur
1235  * or whatever Mavericks' successor is called.  LINKTYPE_PKTAP
1236  * will be 258 *even on OS X*; that is *intentional*, so that
1237  * PKTAP files look the same on *all* OSes (different OSes can have
1238  * different numerical values for a given DLT_, but *MUST NOT* have
1239  * different values for what goes in a file, as files can be moved
1240  * between OSes!).
1241  *
1242  * When capturing, on a system with a Darwin-based OS, on a device
1243  * that returns 149 (DLT_USER2 and Apple's DLT_PKTAP) with this
1244  * version of libpcap, the DLT_ value for the pcap_t  will be DLT_PKTAP,
1245  * and that will continue to be DLT_USER2 on Darwin-based OSes. That way,
1246  * binary compatibility with Mavericks is preserved for programs using
1247  * this version of libpcap.  This does mean that if you were using
1248  * DLT_USER2 for some capture device on OS X, you can't do so with
1249  * this version of libpcap, just as you can't with Apple's libpcap -
1250  * on OS X, they define DLT_PKTAP to be DLT_USER2, so programs won't
1251  * be able to distinguish between PKTAP and whatever you were using
1252  * DLT_USER2 for.
1253  *
1254  * If the program saves the capture to a file using this version of
1255  * libpcap's pcap_dump code, the LINKTYPE_ value in the file will be
1256  * LINKTYPE_PKTAP, which will be 258, even on Darwin-based OSes.
1257  * That way, the file will *not* be a DLT_USER2 file.  That means
1258  * that the latest version of tcpdump, when built with this version
1259  * of libpcap, and sufficiently recent versions of Wireshark will
1260  * be able to read those files and interpret them correctly; however,
1261  * Apple's version of tcpdump in OS X 10.9 won't be able to handle
1262  * them.  (Hopefully, Apple will pick up this version of libpcap,
1263  * and the corresponding version of tcpdump, so that tcpdump will
1264  * be able to handle the old LINKTYPE_USER2 captures *and* the new
1265  * LINKTYPE_PKTAP captures.)
1266  */
1267 #ifdef __APPLE__
1268 #define DLT_PKTAP	DLT_USER2
1269 #else
1270 #define DLT_PKTAP	258
1271 #endif
1272 
1273 /*
1274  * Ethernet packets preceded by a header giving the last 6 octets
1275  * of the preamble specified by 802.3-2012 Clause 65, section
1276  * 65.1.3.2 "Transmit".
1277  */
1278 #define DLT_EPON	259
1279 
1280 /*
1281  * IPMI trace packets, as specified by Table 3-20 "Trace Data Block Format"
1282  * in the PICMG HPM.2 specification.
1283  */
1284 #define DLT_IPMI_HPM_2	260
1285 
1286 /*
1287  * per  Joshua Wright <jwright@hasborg.com>, formats for Zwave captures.
1288  */
1289 #define DLT_ZWAVE_R1_R2  261
1290 #define DLT_ZWAVE_R3     262
1291 
1292 /*
1293  * per Steve Karg <skarg@users.sourceforge.net>, formats for Wattstopper
1294  * Digital Lighting Management room bus serial protocol captures.
1295  */
1296 #define DLT_WATTSTOPPER_DLM     263
1297 
1298 /*
1299  * ISO 14443 contactless smart card messages.
1300  */
1301 #define DLT_ISO_14443	264
1302 
1303 /*
1304  * Radio data system (RDS) groups.  IEC 62106.
1305  * Per Jonathan Brucker <jonathan.brucke@gmail.com>.
1306  */
1307 #define DLT_RDS		265
1308 
1309 /*
1310  * In case the code that includes this file (directly or indirectly)
1311  * has also included OS files that happen to define DLT_MATCHING_MAX,
1312  * with a different value (perhaps because that OS hasn't picked up
1313  * the latest version of our DLT definitions), we undefine the
1314  * previous value of DLT_MATCHING_MAX.
1315  */
1316 #ifdef DLT_MATCHING_MAX
1317 #undef DLT_MATCHING_MAX
1318 #endif
1319 #define DLT_MATCHING_MAX	265	/* highest value in the "matching" range */
1320 
1321 /*
1322  * DLT and savefile link type values are split into a class and
1323  * a member of that class.  A class value of 0 indicates a regular
1324  * DLT_/LINKTYPE_ value.
1325  */
1326 #define DLT_CLASS(x)		((x) & 0x03ff0000)
1327 
1328 /*
1329  * NetBSD-specific generic "raw" link type.  The class value indicates
1330  * that this is the generic raw type, and the lower 16 bits are the
1331  * address family we're dealing with.  Those values are NetBSD-specific;
1332  * do not assume that they correspond to AF_ values for your operating
1333  * system.
1334  */
1335 #define	DLT_CLASS_NETBSD_RAWAF	0x02240000
1336 #define	DLT_NETBSD_RAWAF(af)	(DLT_CLASS_NETBSD_RAWAF | (af))
1337 #define	DLT_NETBSD_RAWAF_AF(x)	((x) & 0x0000ffff)
1338 #define	DLT_IS_NETBSD_RAWAF(x)	(DLT_CLASS(x) == DLT_CLASS_NETBSD_RAWAF)
1339 
1340 #endif /* !defined(lib_pcap_dlt_h) */
1341