libnet  latest
A Portable Framework for Low-Level Network Packet Construction
bpf.h
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  * @(#) $Header: /tcpdump/master/libpcap/pcap/bpf.h,v 1.19.2.8 2008-09-22 20:16:01 guy Exp $ (LBL)
41  */
42 
43 /*
44  * This is libpcap's cut-down version of bpf.h; it includes only
45  * the stuff needed for the code generator and the userland BPF
46  * interpreter, and the libpcap APIs for setting filters, etc..
47  *
48  * "pcap-bpf.c" will include the native OS version, as it deals with
49  * the OS's BPF implementation.
50  *
51  * XXX - should this all just be moved to "pcap.h"?
52  */
53 
54 #ifndef BPF_MAJOR_VERSION
55 
56 #ifdef __cplusplus
57 extern "C" {
58 #endif
59 
60 /* BSD style release date */
61 #define BPF_RELEASE 199606
62 
63 #ifdef MSDOS /* must be 32-bit */
64 typedef long bpf_int32;
65 typedef unsigned long bpf_u_int32;
66 #else
67 typedef int bpf_int32;
68 typedef u_int bpf_u_int32;
69 #endif
70 
71 /*
72  * Alignment macros. BPF_WORDALIGN rounds up to the next
73  * even multiple of BPF_ALIGNMENT.
74  */
75 #ifndef __NetBSD__
76 #define BPF_ALIGNMENT sizeof(bpf_int32)
77 #else
78 #define BPF_ALIGNMENT sizeof(long)
79 #endif
80 #define BPF_WORDALIGN(x) (((x)+(BPF_ALIGNMENT-1))&~(BPF_ALIGNMENT-1))
81 
82 #define BPF_MAXBUFSIZE 0x8000
83 #define BPF_MINBUFSIZE 32
84 
85 /*
86  * Structure for "pcap_compile()", "pcap_setfilter()", etc..
87  */
88 struct bpf_program {
89  u_int bf_len;
90  struct bpf_insn *bf_insns;
91 };
92 
93 /*
94  * Struct return by BIOCVERSION. This represents the version number of
95  * the filter language described by the instruction encodings below.
96  * bpf understands a program iff kernel_major == filter_major &&
97  * kernel_minor >= filter_minor, that is, if the value returned by the
98  * running kernel has the same major number and a minor number equal
99  * equal to or less than the filter being downloaded. Otherwise, the
100  * results are undefined, meaning an error may be returned or packets
101  * may be accepted haphazardly.
102  * It has nothing to do with the source code version.
103  */
104 struct bpf_version {
105  u_short bv_major;
106  u_short bv_minor;
107 };
108 /* Current version number of filter architecture. */
109 #define BPF_MAJOR_VERSION 1
110 #define BPF_MINOR_VERSION 1
111 
112 /*
113  * Data-link level type codes.
114  *
115  * Do *NOT* add new values to this list without asking
116  * "tcpdump-workers@lists.tcpdump.org" for a value. Otherwise, you run
117  * the risk of using a value that's already being used for some other
118  * purpose, and of having tools that read libpcap-format captures not
119  * being able to handle captures with your new DLT_ value, with no hope
120  * that they will ever be changed to do so (as that would destroy their
121  * ability to read captures using that value for that other purpose).
122  */
123 
124 /*
125  * These are the types that are the same on all platforms, and that
126  * have been defined by <net/bpf.h> for ages.
127  */
128 #define DLT_NULL 0 /* BSD loopback encapsulation */
129 #define DLT_EN10MB 1 /* Ethernet (10Mb) */
130 #define DLT_EN3MB 2 /* Experimental Ethernet (3Mb) */
131 #define DLT_AX25 3 /* Amateur Radio AX.25 */
132 #define DLT_PRONET 4 /* Proteon ProNET Token Ring */
133 #define DLT_CHAOS 5 /* Chaos */
134 #define DLT_IEEE802 6 /* 802.5 Token Ring */
135 #define DLT_ARCNET 7 /* ARCNET, with BSD-style header */
136 #define DLT_SLIP 8 /* Serial Line IP */
137 #define DLT_PPP 9 /* Point-to-point Protocol */
138 #define DLT_FDDI 10 /* FDDI */
139 
140 /*
141  * These are types that are different on some platforms, and that
142  * have been defined by <net/bpf.h> for ages. We use #ifdefs to
143  * detect the BSDs that define them differently from the traditional
144  * libpcap <net/bpf.h>
145  *
146  * XXX - DLT_ATM_RFC1483 is 13 in BSD/OS, and DLT_RAW is 14 in BSD/OS,
147  * but I don't know what the right #define is for BSD/OS.
148  */
149 #define DLT_ATM_RFC1483 11 /* LLC-encapsulated ATM */
150 
151 #ifdef __OpenBSD__
152 #define DLT_RAW 14 /* raw IP */
153 #else
154 #define DLT_RAW 12 /* raw IP */
155 #endif
156 
157 /*
158  * Given that the only OS that currently generates BSD/OS SLIP or PPP
159  * is, well, BSD/OS, arguably everybody should have chosen its values
160  * for DLT_SLIP_BSDOS and DLT_PPP_BSDOS, which are 15 and 16, but they
161  * didn't. So it goes.
162  */
163 #if defined(__NetBSD__) || defined(__FreeBSD__)
164 #ifndef DLT_SLIP_BSDOS
165 #define DLT_SLIP_BSDOS 13 /* BSD/OS Serial Line IP */
166 #define DLT_PPP_BSDOS 14 /* BSD/OS Point-to-point Protocol */
167 #endif
168 #else
169 #define DLT_SLIP_BSDOS 15 /* BSD/OS Serial Line IP */
170 #define DLT_PPP_BSDOS 16 /* BSD/OS Point-to-point Protocol */
171 #endif
172 
173 /*
174  * 17 is used for DLT_OLD_PFLOG in OpenBSD;
175  * OBSOLETE: DLT_PFLOG is 117 in OpenBSD now as well. See below.
176  * 18 is used for DLT_PFSYNC in OpenBSD; don't use it for anything else.
177  */
178 
179 #define DLT_ATM_CLIP 19 /* Linux Classical-IP over ATM */
180 
181 /*
182  * Apparently Redback uses this for its SmartEdge 400/800. I hope
183  * nobody else decided to use it, too.
184  */
185 #define DLT_REDBACK_SMARTEDGE 32
186 
187 /*
188  * These values are defined by NetBSD; other platforms should refrain from
189  * using them for other purposes, so that NetBSD savefiles with link
190  * types of 50 or 51 can be read as this type on all platforms.
191  */
192 #define DLT_PPP_SERIAL 50 /* PPP over serial with HDLC encapsulation */
193 #define DLT_PPP_ETHER 51 /* PPP over Ethernet */
194 
195 /*
196  * The Axent Raptor firewall - now the Symantec Enterprise Firewall - uses
197  * a link-layer type of 99 for the tcpdump it supplies. The link-layer
198  * header has 6 bytes of unknown data, something that appears to be an
199  * Ethernet type, and 36 bytes that appear to be 0 in at least one capture
200  * I've seen.
201  */
202 #define DLT_SYMANTEC_FIREWALL 99
203 
204 /*
205  * Values between 100 and 103 are used in capture file headers as
206  * link-layer types corresponding to DLT_ types that differ
207  * between platforms; don't use those values for new DLT_ new types.
208  */
209 
210 /*
211  * This value was defined by libpcap 0.5; platforms that have defined
212  * it with a different value should define it here with that value -
213  * a link type of 104 in a save file will be mapped to DLT_C_HDLC,
214  * whatever value that happens to be, so programs will correctly
215  * handle files with that link type regardless of the value of
216  * DLT_C_HDLC.
217  *
218  * The name DLT_C_HDLC was used by BSD/OS; we use that name for source
219  * compatibility with programs written for BSD/OS.
220  *
221  * libpcap 0.5 defined it as DLT_CHDLC; we define DLT_CHDLC as well,
222  * for source compatibility with programs written for libpcap 0.5.
223  */
224 #define DLT_C_HDLC 104 /* Cisco HDLC */
225 #define DLT_CHDLC DLT_C_HDLC
226 
227 #define DLT_IEEE802_11 105 /* IEEE 802.11 wireless */
228 
229 /*
230  * 106 is reserved for Linux Classical IP over ATM; it's like DLT_RAW,
231  * except when it isn't. (I.e., sometimes it's just raw IP, and
232  * sometimes it isn't.) We currently handle it as DLT_LINUX_SLL,
233  * so that we don't have to worry about the link-layer header.)
234  */
235 
236 /*
237  * Frame Relay; BSD/OS has a DLT_FR with a value of 11, but that collides
238  * with other values.
239  * DLT_FR and DLT_FRELAY packets start with the Q.922 Frame Relay header
240  * (DLCI, etc.).
241  */
242 #define DLT_FRELAY 107
243 
244 /*
245  * OpenBSD DLT_LOOP, for loopback devices; it's like DLT_NULL, except
246  * that the AF_ type in the link-layer header is in network byte order.
247  *
248  * DLT_LOOP is 12 in OpenBSD, but that's DLT_RAW in other OSes, so
249  * we don't use 12 for it in OSes other than OpenBSD.
250  */
251 #ifdef __OpenBSD__
252 #define DLT_LOOP 12
253 #else
254 #define DLT_LOOP 108
255 #endif
256 
257 /*
258  * Encapsulated packets for IPsec; DLT_ENC is 13 in OpenBSD, but that's
259  * DLT_SLIP_BSDOS in NetBSD, so we don't use 13 for it in OSes other
260  * than OpenBSD.
261  */
262 #ifdef __OpenBSD__
263 #define DLT_ENC 13
264 #else
265 #define DLT_ENC 109
266 #endif
267 
268 /*
269  * Values between 110 and 112 are reserved for use in capture file headers
270  * as link-layer types corresponding to DLT_ types that might differ
271  * between platforms; don't use those values for new DLT_ types
272  * other than the corresponding DLT_ types.
273  */
274 
275 /*
276  * This is for Linux cooked sockets.
277  */
278 #define DLT_LINUX_SLL 113
279 
280 /*
281  * Apple LocalTalk hardware.
282  */
283 #define DLT_LTALK 114
284 
285 /*
286  * Acorn Econet.
287  */
288 #define DLT_ECONET 115
289 
290 /*
291  * Reserved for use with OpenBSD ipfilter.
292  */
293 #define DLT_IPFILTER 116
294 
295 /*
296  * OpenBSD DLT_PFLOG; DLT_PFLOG is 17 in OpenBSD, but that's DLT_LANE8023
297  * in SuSE 6.3, so we can't use 17 for it in capture-file headers.
298  *
299  * XXX: is there a conflict with DLT_PFSYNC 18 as well?
300  */
301 #ifdef __OpenBSD__
302 #define DLT_OLD_PFLOG 17
303 #define DLT_PFSYNC 18
304 #endif
305 #define DLT_PFLOG 117
306 
307 /*
308  * Registered for Cisco-internal use.
309  */
310 #define DLT_CISCO_IOS 118
311 
312 /*
313  * For 802.11 cards using the Prism II chips, with a link-layer
314  * header including Prism monitor mode information plus an 802.11
315  * header.
316  */
317 #define DLT_PRISM_HEADER 119
318 
319 /*
320  * Reserved for Aironet 802.11 cards, with an Aironet link-layer header
321  * (see Doug Ambrisko's FreeBSD patches).
322  */
323 #define DLT_AIRONET_HEADER 120
324 
325 /*
326  * Reserved for Siemens HiPath HDLC.
327  */
328 #define DLT_HHDLC 121
329 
330 /*
331  * This is for RFC 2625 IP-over-Fibre Channel.
332  *
333  * This is not for use with raw Fibre Channel, where the link-layer
334  * header starts with a Fibre Channel frame header; it's for IP-over-FC,
335  * where the link-layer header starts with an RFC 2625 Network_Header
336  * field.
337  */
338 #define DLT_IP_OVER_FC 122
339 
340 /*
341  * This is for Full Frontal ATM on Solaris with SunATM, with a
342  * pseudo-header followed by an AALn PDU.
343  *
344  * There may be other forms of Full Frontal ATM on other OSes,
345  * with different pseudo-headers.
346  *
347  * If ATM software returns a pseudo-header with VPI/VCI information
348  * (and, ideally, packet type information, e.g. signalling, ILMI,
349  * LANE, LLC-multiplexed traffic, etc.), it should not use
350  * DLT_ATM_RFC1483, but should get a new DLT_ value, so tcpdump
351  * and the like don't have to infer the presence or absence of a
352  * pseudo-header and the form of the pseudo-header.
353  */
354 #define DLT_SUNATM 123 /* Solaris+SunATM */
355 
356 /*
357  * Reserved as per request from Kent Dahlgren <kent@praesum.com>
358  * for private use.
359  */
360 #define DLT_RIO 124 /* RapidIO */
361 #define DLT_PCI_EXP 125 /* PCI Express */
362 #define DLT_AURORA 126 /* Xilinx Aurora link layer */
363 
364 /*
365  * Header for 802.11 plus a number of bits of link-layer information
366  * including radio information, used by some recent BSD drivers as
367  * well as the madwifi Atheros driver for Linux.
368  */
369 #define DLT_IEEE802_11_RADIO 127 /* 802.11 plus radiotap radio header */
370 
371 /*
372  * Reserved for the TZSP encapsulation, as per request from
373  * Chris Waters <chris.waters@networkchemistry.com>
374  * TZSP is a generic encapsulation for any other link type,
375  * which includes a means to include meta-information
376  * with the packet, e.g. signal strength and channel
377  * for 802.11 packets.
378  */
379 #define DLT_TZSP 128 /* Tazmen Sniffer Protocol */
380 
381 /*
382  * BSD's ARCNET headers have the source host, destination host,
383  * and type at the beginning of the packet; that's what's handed
384  * up to userland via BPF.
385  *
386  * Linux's ARCNET headers, however, have a 2-byte offset field
387  * between the host IDs and the type; that's what's handed up
388  * to userland via PF_PACKET sockets.
389  *
390  * We therefore have to have separate DLT_ values for them.
391  */
392 #define DLT_ARCNET_LINUX 129 /* ARCNET */
393 
394 /*
395  * Juniper-private data link types, as per request from
396  * Hannes Gredler <hannes@juniper.net>. The DLT_s are used
397  * for passing on chassis-internal metainformation such as
398  * QOS profiles, etc..
399  */
400 #define DLT_JUNIPER_MLPPP 130
401 #define DLT_JUNIPER_MLFR 131
402 #define DLT_JUNIPER_ES 132
403 #define DLT_JUNIPER_GGSN 133
404 #define DLT_JUNIPER_MFR 134
405 #define DLT_JUNIPER_ATM2 135
406 #define DLT_JUNIPER_SERVICES 136
407 #define DLT_JUNIPER_ATM1 137
408 
409 /*
410  * Apple IP-over-IEEE 1394, as per a request from Dieter Siegmund
411  * <dieter@apple.com>. The header that's presented is an Ethernet-like
412  * header:
413  *
414  * #define FIREWIRE_EUI64_LEN 8
415  * struct firewire_header {
416  * u_char firewire_dhost[FIREWIRE_EUI64_LEN];
417  * u_char firewire_shost[FIREWIRE_EUI64_LEN];
418  * u_short firewire_type;
419  * };
420  *
421  * with "firewire_type" being an Ethernet type value, rather than,
422  * for example, raw GASP frames being handed up.
423  */
424 #define DLT_APPLE_IP_OVER_IEEE1394 138
425 
426 /*
427  * Various SS7 encapsulations, as per a request from Jeff Morriss
428  * <jeff.morriss[AT]ulticom.com> and subsequent discussions.
429  */
430 #define DLT_MTP2_WITH_PHDR 139 /* pseudo-header with various info, followed by MTP2 */
431 #define DLT_MTP2 140 /* MTP2, without pseudo-header */
432 #define DLT_MTP3 141 /* MTP3, without pseudo-header or MTP2 */
433 #define DLT_SCCP 142 /* SCCP, without pseudo-header or MTP2 or MTP3 */
434 
435 /*
436  * DOCSIS MAC frames.
437  */
438 #define DLT_DOCSIS 143
439 
440 /*
441  * Linux-IrDA packets. Protocol defined at http://www.irda.org.
442  * Those packets include IrLAP headers and above (IrLMP...), but
443  * don't include Phy framing (SOF/EOF/CRC & byte stuffing), because Phy
444  * framing can be handled by the hardware and depend on the bitrate.
445  * This is exactly the format you would get capturing on a Linux-IrDA
446  * interface (irdaX), but not on a raw serial port.
447  * Note the capture is done in "Linux-cooked" mode, so each packet include
448  * a fake packet header (struct sll_header). This is because IrDA packet
449  * decoding is dependant on the direction of the packet (incomming or
450  * outgoing).
451  * When/if other platform implement IrDA capture, we may revisit the
452  * issue and define a real DLT_IRDA...
453  * Jean II
454  */
455 #define DLT_LINUX_IRDA 144
456 
457 /*
458  * Reserved for IBM SP switch and IBM Next Federation switch.
459  */
460 #define DLT_IBM_SP 145
461 #define DLT_IBM_SN 146
462 
463 /*
464  * Reserved for private use. If you have some link-layer header type
465  * that you want to use within your organization, with the capture files
466  * using that link-layer header type not ever be sent outside your
467  * organization, you can use these values.
468  *
469  * No libpcap release will use these for any purpose, nor will any
470  * tcpdump release use them, either.
471  *
472  * Do *NOT* use these in capture files that you expect anybody not using
473  * your private versions of capture-file-reading tools to read; in
474  * particular, do *NOT* use them in products, otherwise you may find that
475  * people won't be able to use tcpdump, or snort, or Ethereal, or... to
476  * read capture files from your firewall/intrusion detection/traffic
477  * monitoring/etc. appliance, or whatever product uses that DLT_ value,
478  * and you may also find that the developers of those applications will
479  * not accept patches to let them read those files.
480  *
481  * Also, do not use them if somebody might send you a capture using them
482  * for *their* private type and tools using them for *your* private type
483  * would have to read them.
484  *
485  * Instead, ask "tcpdump-workers@lists.tcpdump.org" for a new DLT_ value,
486  * as per the comment above, and use the type you're given.
487  */
488 #define DLT_USER0 147
489 #define DLT_USER1 148
490 #define DLT_USER2 149
491 #define DLT_USER3 150
492 #define DLT_USER4 151
493 #define DLT_USER5 152
494 #define DLT_USER6 153
495 #define DLT_USER7 154
496 #define DLT_USER8 155
497 #define DLT_USER9 156
498 #define DLT_USER10 157
499 #define DLT_USER11 158
500 #define DLT_USER12 159
501 #define DLT_USER13 160
502 #define DLT_USER14 161
503 #define DLT_USER15 162
504 
505 /*
506  * For future use with 802.11 captures - defined by AbsoluteValue
507  * Systems to store a number of bits of link-layer information
508  * including radio information:
509  *
510  * http://www.shaftnet.org/~pizza/software/capturefrm.txt
511  *
512  * but it might be used by some non-AVS drivers now or in the
513  * future.
514  */
515 #define DLT_IEEE802_11_RADIO_AVS 163 /* 802.11 plus AVS radio header */
516 
517 /*
518  * Juniper-private data link type, as per request from
519  * Hannes Gredler <hannes@juniper.net>. The DLT_s are used
520  * for passing on chassis-internal metainformation such as
521  * QOS profiles, etc..
522  */
523 #define DLT_JUNIPER_MONITOR 164
524 
525 /*
526  * Reserved for BACnet MS/TP.
527  */
528 #define DLT_BACNET_MS_TP 165
529 
530 /*
531  * Another PPP variant as per request from Karsten Keil <kkeil@suse.de>.
532  *
533  * This is used in some OSes to allow a kernel socket filter to distinguish
534  * between incoming and outgoing packets, on a socket intended to
535  * supply pppd with outgoing packets so it can do dial-on-demand and
536  * hangup-on-lack-of-demand; incoming packets are filtered out so they
537  * don't cause pppd to hold the connection up (you don't want random
538  * input packets such as port scans, packets from old lost connections,
539  * etc. to force the connection to stay up).
540  *
541  * The first byte of the PPP header (0xff03) is modified to accomodate
542  * the direction - 0x00 = IN, 0x01 = OUT.
543  */
544 #define DLT_PPP_PPPD 166
545 
546 /*
547  * Names for backwards compatibility with older versions of some PPP
548  * software; new software should use DLT_PPP_PPPD.
549  */
550 #define DLT_PPP_WITH_DIRECTION DLT_PPP_PPPD
551 #define DLT_LINUX_PPP_WITHDIRECTION DLT_PPP_PPPD
552 
553 /*
554  * Juniper-private data link type, as per request from
555  * Hannes Gredler <hannes@juniper.net>. The DLT_s are used
556  * for passing on chassis-internal metainformation such as
557  * QOS profiles, cookies, etc..
558  */
559 #define DLT_JUNIPER_PPPOE 167
560 #define DLT_JUNIPER_PPPOE_ATM 168
561 
562 #define DLT_GPRS_LLC 169 /* GPRS LLC */
563 #define DLT_GPF_T 170 /* GPF-T (ITU-T G.7041/Y.1303) */
564 #define DLT_GPF_F 171 /* GPF-F (ITU-T G.7041/Y.1303) */
565 
566 /*
567  * Requested by Oolan Zimmer <oz@gcom.com> for use in Gcom's T1/E1 line
568  * monitoring equipment.
569  */
570 #define DLT_GCOM_T1E1 172
571 #define DLT_GCOM_SERIAL 173
572 
573 /*
574  * Juniper-private data link type, as per request from
575  * Hannes Gredler <hannes@juniper.net>. The DLT_ is used
576  * for internal communication to Physical Interface Cards (PIC)
577  */
578 #define DLT_JUNIPER_PIC_PEER 174
579 
580 /*
581  * Link types requested by Gregor Maier <gregor@endace.com> of Endace
582  * Measurement Systems. They add an ERF header (see
583  * http://www.endace.com/support/EndaceRecordFormat.pdf) in front of
584  * the link-layer header.
585  */
586 #define DLT_ERF_ETH 175 /* Ethernet */
587 #define DLT_ERF_POS 176 /* Packet-over-SONET */
588 
589 /*
590  * Requested by Daniele Orlandi <daniele@orlandi.com> for raw LAPD
591  * for vISDN (http://www.orlandi.com/visdn/). Its link-layer header
592  * includes additional information before the LAPD header, so it's
593  * not necessarily a generic LAPD header.
594  */
595 #define DLT_LINUX_LAPD 177
596 
597 /*
598  * Juniper-private data link type, as per request from
599  * Hannes Gredler <hannes@juniper.net>.
600  * The DLT_ are used for prepending meta-information
601  * like interface index, interface name
602  * before standard Ethernet, PPP, Frelay & C-HDLC Frames
603  */
604 #define DLT_JUNIPER_ETHER 178
605 #define DLT_JUNIPER_PPP 179
606 #define DLT_JUNIPER_FRELAY 180
607 #define DLT_JUNIPER_CHDLC 181
608 
609 /*
610  * Multi Link Frame Relay (FRF.16)
611  */
612 #define DLT_MFR 182
613 
614 /*
615  * Juniper-private data link type, as per request from
616  * Hannes Gredler <hannes@juniper.net>.
617  * The DLT_ is used for internal communication with a
618  * voice Adapter Card (PIC)
619  */
620 #define DLT_JUNIPER_VP 183
621 
622 /*
623  * Arinc 429 frames.
624  * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>.
625  * Every frame contains a 32bit A429 label.
626  * More documentation on Arinc 429 can be found at
627  * http://www.condoreng.com/support/downloads/tutorials/ARINCTutorial.pdf
628  */
629 #define DLT_A429 184
630 
631 /*
632  * Arinc 653 Interpartition Communication messages.
633  * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>.
634  * Please refer to the A653-1 standard for more information.
635  */
636 #define DLT_A653_ICM 185
637 
638 /*
639  * USB packets, beginning with a USB setup header; requested by
640  * Paolo Abeni <paolo.abeni@email.it>.
641  */
642 #define DLT_USB 186
643 
644 /*
645  * Bluetooth HCI UART transport layer (part H:4); requested by
646  * Paolo Abeni.
647  */
648 #define DLT_BLUETOOTH_HCI_H4 187
649 
650 /*
651  * IEEE 802.16 MAC Common Part Sublayer; requested by Maria Cruz
652  * <cruz_petagay@bah.com>.
653  */
654 #define DLT_IEEE802_16_MAC_CPS 188
655 
656 /*
657  * USB packets, beginning with a Linux USB header; requested by
658  * Paolo Abeni <paolo.abeni@email.it>.
659  */
660 #define DLT_USB_LINUX 189
661 
662 /*
663  * Controller Area Network (CAN) v. 2.0B packets.
664  * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>.
665  * Used to dump CAN packets coming from a CAN Vector board.
666  * More documentation on the CAN v2.0B frames can be found at
667  * http://www.can-cia.org/downloads/?269
668  */
669 #define DLT_CAN20B 190
670 
671 /*
672  * IEEE 802.15.4, with address fields padded, as is done by Linux
673  * drivers; requested by Juergen Schimmer.
674  */
675 #define DLT_IEEE802_15_4_LINUX 191
676 
677 /*
678  * Per Packet Information encapsulated packets.
679  * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>.
680  */
681 #define DLT_PPI 192
682 
683 /*
684  * Header for 802.16 MAC Common Part Sublayer plus a radiotap radio header;
685  * requested by Charles Clancy.
686  */
687 #define DLT_IEEE802_16_MAC_CPS_RADIO 193
688 
689 /*
690  * Juniper-private data link type, as per request from
691  * Hannes Gredler <hannes@juniper.net>.
692  * The DLT_ is used for internal communication with a
693  * integrated service module (ISM).
694  */
695 #define DLT_JUNIPER_ISM 194
696 
697 /*
698  * IEEE 802.15.4, exactly as it appears in the spec (no padding, no
699  * nothing); requested by Mikko Saarnivala <mikko.saarnivala@sensinode.com>.
700  */
701 #define DLT_IEEE802_15_4 195
702 
703 /*
704  * Various link-layer types, with a pseudo-header, for SITA
705  * (http://www.sita.aero/); requested by Fulko Hew (fulko.hew@gmail.com).
706  */
707 #define DLT_SITA 196
708 
709 /*
710  * Various link-layer types, with a pseudo-header, for Endace DAG cards;
711  * encapsulates Endace ERF records. Requested by Stephen Donnelly
712  * <stephen@endace.com>.
713  */
714 #define DLT_ERF 197
715 
716 /*
717  * Special header prepended to Ethernet packets when capturing from a
718  * u10 Networks board. Requested by Phil Mulholland
719  * <phil@u10networks.com>.
720  */
721 #define DLT_RAIF1 198
722 
723 /*
724  * IPMB packet for IPMI, beginning with the I2C slave address, followed
725  * by the netFn and LUN, etc.. Requested by Chanthy Toeung
726  * <chanthy.toeung@ca.kontron.com>.
727  */
728 #define DLT_IPMB 199
729 
730 /*
731  * Juniper-private data link type, as per request from
732  * Hannes Gredler <hannes@juniper.net>.
733  * The DLT_ is used for capturing data on a secure tunnel interface.
734  */
735 #define DLT_JUNIPER_ST 200
736 
737 /*
738  * Bluetooth HCI UART transport layer (part H:4), with pseudo-header
739  * that includes direction information; requested by Paolo Abeni.
740  */
741 #define DLT_BLUETOOTH_HCI_H4_WITH_PHDR 201
742 
743 /*
744  * AX.25 packet with a 1-byte KISS header; see
745  *
746  * http://www.ax25.net/kiss.htm
747  *
748  * as per Richard Stearn <richard@rns-stearn.demon.co.uk>.
749  */
750 #define DLT_AX25_KISS 202
751 
752 /*
753  * LAPD packets from an ISDN channel, starting with the address field,
754  * with no pseudo-header.
755  * Requested by Varuna De Silva <varunax@gmail.com>.
756  */
757 #define DLT_LAPD 203
758 
759 /*
760  * Variants of various link-layer headers, with a one-byte direction
761  * pseudo-header prepended - zero means "received by this host",
762  * non-zero (any non-zero value) means "sent by this host" - as per
763  * Will Barker <w.barker@zen.co.uk>.
764  */
765 #define DLT_PPP_WITH_DIR 204 /* PPP - don't confuse with DLT_PPP_WITH_DIRECTION */
766 #define DLT_C_HDLC_WITH_DIR 205 /* Cisco HDLC */
767 #define DLT_FRELAY_WITH_DIR 206 /* Frame Relay */
768 #define DLT_LAPB_WITH_DIR 207 /* LAPB */
769 
770 /*
771  * 208 is reserved for an as-yet-unspecified proprietary link-layer
772  * type, as requested by Will Barker.
773  */
774 
775 /*
776  * IPMB with a Linux-specific pseudo-header; as requested by Alexey Neyman
777  * <avn@pigeonpoint.com>.
778  */
779 #define DLT_IPMB_LINUX 209
780 
781 /*
782  * FlexRay automotive bus - http://www.flexray.com/ - as requested
783  * by Hannes Kaelber <hannes.kaelber@x2e.de>.
784  */
785 #define DLT_FLEXRAY 210
786 
787 /*
788  * Media Oriented Systems Transport (MOST) bus for multimedia
789  * transport - http://www.mostcooperation.com/ - as requested
790  * by Hannes Kaelber <hannes.kaelber@x2e.de>.
791  */
792 #define DLT_MOST 211
793 
794 /*
795  * Local Interconnect Network (LIN) bus for vehicle networks -
796  * http://www.lin-subbus.org/ - as requested by Hannes Kaelber
797  * <hannes.kaelber@x2e.de>.
798  */
799 #define DLT_LIN 212
800 
801 /*
802  * X2E-private data link type used for serial line capture,
803  * as requested by Hannes Kaelber <hannes.kaelber@x2e.de>.
804  */
805 #define DLT_X2E_SERIAL 213
806 
807 /*
808  * X2E-private data link type used for the Xoraya data logger
809  * family, as requested by Hannes Kaelber <hannes.kaelber@x2e.de>.
810  */
811 #define DLT_X2E_XORAYA 214
812 
813 /*
814  * IEEE 802.15.4, exactly as it appears in the spec (no padding, no
815  * nothing), but with the PHY-level data for non-ASK PHYs (4 octets
816  * of 0 as preamble, one octet of SFD, one octet of frame length+
817  * reserved bit, and then the MAC-layer data, starting with the
818  * frame control field).
819  *
820  * Requested by Max Filippov <jcmvbkbc@gmail.com>.
821  */
822 #define DLT_IEEE802_15_4_NONASK_PHY 215
823 
824 
825 /*
826  * DLT and savefile link type values are split into a class and
827  * a member of that class. A class value of 0 indicates a regular
828  * DLT_/LINKTYPE_ value.
829  */
830 #define DLT_CLASS(x) ((x) & 0x03ff0000)
831 
832 /*
833  * NetBSD-specific generic "raw" link type. The class value indicates
834  * that this is the generic raw type, and the lower 16 bits are the
835  * address family we're dealing with. Those values are NetBSD-specific;
836  * do not assume that they correspond to AF_ values for your operating
837  * system.
838  */
839 #define DLT_CLASS_NETBSD_RAWAF 0x02240000
840 #define DLT_NETBSD_RAWAF(af) (DLT_CLASS_NETBSD_RAWAF | (af))
841 #define DLT_NETBSD_RAWAF_AF(x) ((x) & 0x0000ffff)
842 #define DLT_IS_NETBSD_RAWAF(x) (DLT_CLASS(x) == DLT_CLASS_NETBSD_RAWAF)
843 
844 
845 /*
846  * The instruction encodings.
847  */
848 /* instruction classes */
849 #define BPF_CLASS(code) ((code) & 0x07)
850 #define BPF_LD 0x00
851 #define BPF_LDX 0x01
852 #define BPF_ST 0x02
853 #define BPF_STX 0x03
854 #define BPF_ALU 0x04
855 #define BPF_JMP 0x05
856 #define BPF_RET 0x06
857 #define BPF_MISC 0x07
858 
859 /* ld/ldx fields */
860 #define BPF_SIZE(code) ((code) & 0x18)
861 #define BPF_W 0x00
862 #define BPF_H 0x08
863 #define BPF_B 0x10
864 #define BPF_MODE(code) ((code) & 0xe0)
865 #define BPF_IMM 0x00
866 #define BPF_ABS 0x20
867 #define BPF_IND 0x40
868 #define BPF_MEM 0x60
869 #define BPF_LEN 0x80
870 #define BPF_MSH 0xa0
871 
872 /* alu/jmp fields */
873 #define BPF_OP(code) ((code) & 0xf0)
874 #define BPF_ADD 0x00
875 #define BPF_SUB 0x10
876 #define BPF_MUL 0x20
877 #define BPF_DIV 0x30
878 #define BPF_OR 0x40
879 #define BPF_AND 0x50
880 #define BPF_LSH 0x60
881 #define BPF_RSH 0x70
882 #define BPF_NEG 0x80
883 #define BPF_JA 0x00
884 #define BPF_JEQ 0x10
885 #define BPF_JGT 0x20
886 #define BPF_JGE 0x30
887 #define BPF_JSET 0x40
888 #define BPF_SRC(code) ((code) & 0x08)
889 #define BPF_K 0x00
890 #define BPF_X 0x08
891 
892 /* ret - BPF_K and BPF_X also apply */
893 #define BPF_RVAL(code) ((code) & 0x18)
894 #define BPF_A 0x10
895 
896 /* misc */
897 #define BPF_MISCOP(code) ((code) & 0xf8)
898 #define BPF_TAX 0x00
899 #define BPF_TXA 0x80
900 
901 /*
902  * The instruction data structure.
903  */
904 struct bpf_insn {
905  u_short code;
906  u_char jt;
907  u_char jf;
908  bpf_u_int32 k;
909 };
910 
911 /*
912  * Macros for insn array initializers.
913  */
914 #define BPF_STMT(code, k) { (u_short)(code), 0, 0, k }
915 #define BPF_JUMP(code, k, jt, jf) { (u_short)(code), jt, jf, k }
916 
917 #if __STDC__ || defined(__cplusplus)
918 extern int bpf_validate(const struct bpf_insn *, int);
919 extern u_int bpf_filter(const struct bpf_insn *, const u_char *, u_int, u_int);
920 #else
921 extern int bpf_validate();
922 extern u_int bpf_filter();
923 #endif
924 
925 /*
926  * Number of scratch memory words (for BPF_LD|BPF_MEM and BPF_ST).
927  */
928 #define BPF_MEMWORDS 16
929 
930 #ifdef __cplusplus
931 }
932 #endif
933 
934 #endif
A single BPF pseudo-instruction.
Definition: bpf.h:240
A BPF pseudo-assembly program.
Definition: bpf.h:70
struct bpf_insn * bf_insns
A pointer to the first instruction of the program.
Definition: bpf.h:72
Definition: bpf.h:94