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bpf.h @ c4ee445

4.1155-freebsd-126-freebsd-12freebsd-9.3

Last change on this file since c4ee445 was c4ee445, checked in by Sebastian Huber <sebastian.huber@…>, on 01/20/14 at 13:59:42

Define FreeBSD in <net/bpf.h> if not defined

This makes it possible to use this header file directly in applications.

Property mode set to 100644

File size: 39.3 KB

Line
1	/*-
2	* Copyright (c) 1990, 1991, 1993
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	* 4. 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 8.1 (Berkeley) 6/10/93
35	* @(#)bpf.h 1.34 (LBL) 6/16/96
36	*
37	* $FreeBSD$
38	*/
39
40	#ifndef _NET_BPF_H_
41	#define _NET_BPF_H_
42
43	#if defined(__rtems__) && !defined(__FreeBSD__)
44	#define __FreeBSD__ 1
45	#endif /* defined(__rtems__) && !defined(__FreeBSD__) */
46	/* BSD style release date */
47	#define BPF_RELEASE 199606
48
49	typedef int32_t bpf_int32;
50	typedef u_int32_t bpf_u_int32;
51	typedef int64_t bpf_int64;
52	typedef u_int64_t bpf_u_int64;
53
54	/*
55	* Alignment macros. BPF_WORDALIGN rounds up to the next
56	* even multiple of BPF_ALIGNMENT.
57	*/
58	#define BPF_ALIGNMENT sizeof(long)
59	#define BPF_WORDALIGN(x) (((x)+(BPF_ALIGNMENT-1))&~(BPF_ALIGNMENT-1))
60
61	#define BPF_MAXINSNS 512
62	#define BPF_MAXBUFSIZE 0x80000
63	#define BPF_MINBUFSIZE 32
64
65	/*
66	* Structure for BIOCSETF.
67	*/
68	struct bpf_program {
69	u_int bf_len;
70	struct bpf_insn *bf_insns;
71	};
72
73	/*
74	* Struct returned by BIOCGSTATS.
75	*/
76	struct bpf_stat {
77	u_int bs_recv; /* number of packets received */
78	u_int bs_drop; /* number of packets dropped */
79	};
80
81	/*
82	* Struct return by BIOCVERSION. This represents the version number of
83	* the filter language described by the instruction encodings below.
84	* bpf understands a program iff kernel_major == filter_major &&
85	* kernel_minor >= filter_minor, that is, if the value returned by the
86	* running kernel has the same major number and a minor number equal
87	* equal to or less than the filter being downloaded. Otherwise, the
88	* results are undefined, meaning an error may be returned or packets
89	* may be accepted haphazardly.
90	* It has nothing to do with the source code version.
91	*/
92	struct bpf_version {
93	u_short bv_major;
94	u_short bv_minor;
95	};
96	/* Current version number of filter architecture. */
97	#define BPF_MAJOR_VERSION 1
98	#define BPF_MINOR_VERSION 1
99
100	/*
101	* Historically, BPF has supported a single buffering model, first using mbuf
102	* clusters in kernel, and later using malloc(9) buffers in kernel. We now
103	* support multiple buffering modes, which may be queried and set using
104	* BIOCGETBUFMODE and BIOCSETBUFMODE. So as to avoid handling the complexity
105	* of changing modes while sniffing packets, the mode becomes fixed once an
106	* interface has been attached to the BPF descriptor.
107	*/
108	#define BPF_BUFMODE_BUFFER 1 /* Kernel buffers with read(). */
109	#define BPF_BUFMODE_ZBUF 2 /* Zero-copy buffers. */
110
111	/*-
112	* Struct used by BIOCSETZBUF, BIOCROTZBUF: describes up to two zero-copy
113	* buffer as used by BPF.
114	*/
115	struct bpf_zbuf {
116	void bz_bufa; / Location of 'a' zero-copy buffer. */
117	void bz_bufb; / Location of 'b' zero-copy buffer. */
118	size_t bz_buflen; /* Size of zero-copy buffers. */
119	};
120
121	#define BIOCGBLEN _IOR('B', 102, u_int)
122	#define BIOCSBLEN _IOWR('B', 102, u_int)
123	#define BIOCSETF _IOW('B', 103, struct bpf_program)
124	#define BIOCFLUSH _IO('B', 104)
125	#define BIOCPROMISC _IO('B', 105)
126	#define BIOCGDLT _IOR('B', 106, u_int)
127	#define BIOCGETIF _IOR('B', 107, struct ifreq)
128	#define BIOCSETIF _IOW('B', 108, struct ifreq)
129	#define BIOCSRTIMEOUT _IOW('B', 109, struct timeval)
130	#define BIOCGRTIMEOUT _IOR('B', 110, struct timeval)
131	#define BIOCGSTATS _IOR('B', 111, struct bpf_stat)
132	#define BIOCIMMEDIATE _IOW('B', 112, u_int)
133	#define BIOCVERSION _IOR('B', 113, struct bpf_version)
134	#define BIOCGRSIG _IOR('B', 114, u_int)
135	#define BIOCSRSIG _IOW('B', 115, u_int)
136	#define BIOCGHDRCMPLT _IOR('B', 116, u_int)
137	#define BIOCSHDRCMPLT _IOW('B', 117, u_int)
138	#define BIOCGDIRECTION _IOR('B', 118, u_int)
139	#define BIOCSDIRECTION _IOW('B', 119, u_int)
140	#define BIOCSDLT _IOW('B', 120, u_int)
141	#define BIOCGDLTLIST _IOWR('B', 121, struct bpf_dltlist)
142	#define BIOCLOCK _IO('B', 122)
143	#define BIOCSETWF _IOW('B', 123, struct bpf_program)
144	#define BIOCFEEDBACK _IOW('B', 124, u_int)
145	#define BIOCGETBUFMODE _IOR('B', 125, u_int)
146	#define BIOCSETBUFMODE _IOW('B', 126, u_int)
147	#define BIOCGETZMAX _IOR('B', 127, size_t)
148	#define BIOCROTZBUF _IOR('B', 128, struct bpf_zbuf)
149	#define BIOCSETZBUF _IOW('B', 129, struct bpf_zbuf)
150	#define BIOCSETFNR _IOW('B', 130, struct bpf_program)
151	#define BIOCGTSTAMP _IOR('B', 131, u_int)
152	#define BIOCSTSTAMP _IOW('B', 132, u_int)
153
154	/* Obsolete */
155	#define BIOCGSEESENT BIOCGDIRECTION
156	#define BIOCSSEESENT BIOCSDIRECTION
157
158	/* Packet directions */
159	enum bpf_direction {
160	BPF_D_IN, /* See incoming packets */
161	BPF_D_INOUT, /* See incoming and outgoing packets */
162	BPF_D_OUT /* See outgoing packets */
163	};
164
165	/* Time stamping functions */
166	#define BPF_T_MICROTIME 0x0000
167	#define BPF_T_NANOTIME 0x0001
168	#define BPF_T_BINTIME 0x0002
169	#define BPF_T_NONE 0x0003
170	#define BPF_T_FORMAT_MASK 0x0003
171	#define BPF_T_NORMAL 0x0000
172	#define BPF_T_FAST 0x0100
173	#define BPF_T_MONOTONIC 0x0200
174	#define BPF_T_MONOTONIC_FAST (BPF_T_FAST \| BPF_T_MONOTONIC)
175	#define BPF_T_FLAG_MASK 0x0300
176	#define BPF_T_FORMAT(t) ((t) & BPF_T_FORMAT_MASK)
177	#define BPF_T_FLAG(t) ((t) & BPF_T_FLAG_MASK)
178	#define BPF_T_VALID(t) \
179	((t) == BPF_T_NONE \|\| (BPF_T_FORMAT(t) != BPF_T_NONE && \
180	((t) & ~(BPF_T_FORMAT_MASK \| BPF_T_FLAG_MASK)) == 0))
181
182	#define BPF_T_MICROTIME_FAST (BPF_T_MICROTIME \| BPF_T_FAST)
183	#define BPF_T_NANOTIME_FAST (BPF_T_NANOTIME \| BPF_T_FAST)
184	#define BPF_T_BINTIME_FAST (BPF_T_BINTIME \| BPF_T_FAST)
185	#define BPF_T_MICROTIME_MONOTONIC (BPF_T_MICROTIME \| BPF_T_MONOTONIC)
186	#define BPF_T_NANOTIME_MONOTONIC (BPF_T_NANOTIME \| BPF_T_MONOTONIC)
187	#define BPF_T_BINTIME_MONOTONIC (BPF_T_BINTIME \| BPF_T_MONOTONIC)
188	#define BPF_T_MICROTIME_MONOTONIC_FAST (BPF_T_MICROTIME \| BPF_T_MONOTONIC_FAST)
189	#define BPF_T_NANOTIME_MONOTONIC_FAST (BPF_T_NANOTIME \| BPF_T_MONOTONIC_FAST)
190	#define BPF_T_BINTIME_MONOTONIC_FAST (BPF_T_BINTIME \| BPF_T_MONOTONIC_FAST)
191
192	/*
193	* Structure prepended to each packet.
194	*/
195	struct bpf_ts {
196	bpf_int64 bt_sec; /* seconds */
197	bpf_u_int64 bt_frac; /* fraction */
198	};
199	struct bpf_xhdr {
200	struct bpf_ts bh_tstamp; /* time stamp */
201	bpf_u_int32 bh_caplen; /* length of captured portion */
202	bpf_u_int32 bh_datalen; /* original length of packet */
203	u_short bh_hdrlen; /* length of bpf header (this struct
204	plus alignment padding) */
205	};
206	/* Obsolete */
207	struct bpf_hdr {
208	struct timeval bh_tstamp; /* time stamp */
209	bpf_u_int32 bh_caplen; /* length of captured portion */
210	bpf_u_int32 bh_datalen; /* original length of packet */
211	u_short bh_hdrlen; /* length of bpf header (this struct
212	plus alignment padding) */
213	};
214	#ifdef _KERNEL
215	#define MTAG_BPF 0x627066
216	#define MTAG_BPF_TIMESTAMP 0
217	#endif
218
219	/*
220	* When using zero-copy BPF buffers, a shared memory header is present
221	* allowing the kernel BPF implementation and user process to synchronize
222	* without using system calls. This structure defines that header. When
223	* accessing these fields, appropriate atomic operation and memory barriers
224	* are required in order not to see stale or out-of-order data; see bpf(4)
225	* for reference code to access these fields from userspace.
226	*
227	* The layout of this structure is critical, and must not be changed; if must
228	* fit in a single page on all architectures.
229	*/
230	struct bpf_zbuf_header {
231	volatile u_int bzh_kernel_gen; /* Kernel generation number. */
232	volatile u_int bzh_kernel_len; /* Length of data in the buffer. */
233	volatile u_int bzh_user_gen; /* User generation number. */
234	u_int _bzh_pad[5];
235	};
236
237	/*
238	* Data-link level type codes.
239	*/
240	#define DLT_NULL 0 /* BSD loopback encapsulation */
241	#define DLT_EN10MB 1 /* Ethernet (10Mb) */
242	#define DLT_EN3MB 2 /* Experimental Ethernet (3Mb) */
243	#define DLT_AX25 3 /* Amateur Radio AX.25 */
244	#define DLT_PRONET 4 /* Proteon ProNET Token Ring */
245	#define DLT_CHAOS 5 /* Chaos */
246	#define DLT_IEEE802 6 /* IEEE 802 Networks */
247	#define DLT_ARCNET 7 /* ARCNET */
248	#define DLT_SLIP 8 /* Serial Line IP */
249	#define DLT_PPP 9 /* Point-to-point Protocol */
250	#define DLT_FDDI 10 /* FDDI */
251	#define DLT_ATM_RFC1483 11 /* LLC/SNAP encapsulated atm */
252	#define DLT_RAW 12 /* raw IP */
253
254	/*
255	* These are values from BSD/OS's "bpf.h".
256	* These are not the same as the values from the traditional libpcap
257	* "bpf.h"; however, these values shouldn't be generated by any
258	* OS other than BSD/OS, so the correct values to use here are the
259	* BSD/OS values.
260	*
261	* Platforms that have already assigned these values to other
262	* DLT_ codes, however, should give these codes the values
263	* from that platform, so that programs that use these codes will
264	* continue to compile - even though they won't correctly read
265	* files of these types.
266	*/
267	#define DLT_SLIP_BSDOS 15 /* BSD/OS Serial Line IP */
268	#define DLT_PPP_BSDOS 16 /* BSD/OS Point-to-point Protocol */
269
270	#define DLT_ATM_CLIP 19 /* Linux Classical-IP over ATM */
271
272	/*
273	* These values are defined by NetBSD; other platforms should refrain from
274	* using them for other purposes, so that NetBSD savefiles with link
275	* types of 50 or 51 can be read as this type on all platforms.
276	*/
277	#define DLT_PPP_SERIAL 50 /* PPP over serial with HDLC encapsulation */
278	#define DLT_PPP_ETHER 51 /* PPP over Ethernet */
279
280	/*
281	* Reserved for the Symantec Enterprise Firewall.
282	*/
283	#define DLT_SYMANTEC_FIREWALL 99
284
285	/*
286	* Values between 100 and 103 are used in capture file headers as
287	* link-layer header type LINKTYPE_ values corresponding to DLT_ types
288	* that differ between platforms; don't use those values for new DLT_
289	* new types.
290	*/
291
292	/*
293	* Values starting with 104 are used for newly-assigned link-layer
294	* header type values; for those link-layer header types, the DLT_
295	* value returned by pcap_datalink() and passed to pcap_open_dead(),
296	* and the LINKTYPE_ value that appears in capture files, are the
297	* same.
298	*
299	* DLT_MATCHING_MIN is the lowest such value; DLT_MATCHING_MAX is
300	* the highest such value.
301	*/
302	#define DLT_MATCHING_MIN 104
303
304	/*
305	* This value was defined by libpcap 0.5; platforms that have defined
306	* it with a different value should define it here with that value -
307	* a link type of 104 in a save file will be mapped to DLT_C_HDLC,
308	* whatever value that happens to be, so programs will correctly
309	* handle files with that link type regardless of the value of
310	* DLT_C_HDLC.
311	*
312	* The name DLT_C_HDLC was used by BSD/OS; we use that name for source
313	* compatibility with programs written for BSD/OS.
314	*
315	* libpcap 0.5 defined it as DLT_CHDLC; we define DLT_CHDLC as well,
316	* for source compatibility with programs written for libpcap 0.5.
317	*/
318	#define DLT_C_HDLC 104 /* Cisco HDLC */
319	#define DLT_CHDLC DLT_C_HDLC
320
321	#define DLT_IEEE802_11 105 /* IEEE 802.11 wireless */
322
323	/*
324	* Values between 106 and 107 are used in capture file headers as
325	* link-layer types corresponding to DLT_ types that might differ
326	* between platforms; don't use those values for new DLT_ new types.
327	*/
328
329	/*
330	* Frame Relay; BSD/OS has a DLT_FR with a value of 11, but that collides
331	* with other values.
332	* DLT_FR and DLT_FRELAY packets start with the Q.922 Frame Relay header
333	* (DLCI, etc.).
334	*/
335	#define DLT_FRELAY 107
336
337	/*
338	* OpenBSD DLT_LOOP, for loopback devices; it's like DLT_NULL, except
339	* that the AF_ type in the link-layer header is in network byte order.
340	*
341	* OpenBSD defines it as 12, but that collides with DLT_RAW, so we
342	* define it as 108 here. If OpenBSD picks up this file, it should
343	* define DLT_LOOP as 12 in its version, as per the comment above -
344	* and should not use 108 as a DLT_ value.
345	*/
346	#define DLT_LOOP 108
347
348	/*
349	* Values between 109 and 112 are used in capture file headers as
350	* link-layer types corresponding to DLT_ types that might differ
351	* between platforms; don't use those values for new DLT_ new types.
352	*/
353
354	/*
355	* Encapsulated packets for IPsec; DLT_ENC is 13 in OpenBSD, but that's
356	* DLT_SLIP_BSDOS in NetBSD, so we don't use 13 for it in OSes other
357	* than OpenBSD.
358	*/
359	#define DLT_ENC 109
360
361	/*
362	* This is for Linux cooked sockets.
363	*/
364	#define DLT_LINUX_SLL 113
365
366	/*
367	* Apple LocalTalk hardware.
368	*/
369	#define DLT_LTALK 114
370
371	/*
372	* Acorn Econet.
373	*/
374	#define DLT_ECONET 115
375
376	/*
377	* Reserved for use with OpenBSD ipfilter.
378	*/
379	#define DLT_IPFILTER 116
380
381	/*
382	* Reserved for use in capture-file headers as a link-layer type
383	* corresponding to OpenBSD DLT_PFLOG; DLT_PFLOG is 17 in OpenBSD,
384	* but that's DLT_LANE8023 in SuSE 6.3, so we can't use 17 for it
385	* in capture-file headers.
386	*/
387	#define DLT_PFLOG 117
388
389	/*
390	* Registered for Cisco-internal use.
391	*/
392	#define DLT_CISCO_IOS 118
393
394	/*
395	* Reserved for 802.11 cards using the Prism II chips, with a link-layer
396	* header including Prism monitor mode information plus an 802.11
397	* header.
398	*/
399	#define DLT_PRISM_HEADER 119
400
401	/*
402	* Reserved for Aironet 802.11 cards, with an Aironet link-layer header
403	* (see Doug Ambrisko's FreeBSD patches).
404	*/
405	#define DLT_AIRONET_HEADER 120
406
407	/*
408	* Reserved for use by OpenBSD's pfsync device.
409	*/
410	#define DLT_PFSYNC 121
411
412	/*
413	* Reserved for Siemens HiPath HDLC. XXX
414	*/
415	#define DLT_HHDLC 121
416
417	/*
418	* Reserved for RFC 2625 IP-over-Fibre Channel.
419	*/
420	#define DLT_IP_OVER_FC 122
421
422	/*
423	* Reserved for Full Frontal ATM on Solaris.
424	*/
425	#define DLT_SUNATM 123
426
427	/*
428	* Reserved as per request from Kent Dahlgren <kent@praesum.com>
429	* for private use.
430	*/
431	#define DLT_RIO 124 /* RapidIO */
432	#define DLT_PCI_EXP 125 /* PCI Express */
433	#define DLT_AURORA 126 /* Xilinx Aurora link layer */
434
435	/*
436	* BSD header for 802.11 plus a number of bits of link-layer information
437	* including radio information.
438	*/
439	#ifndef DLT_IEEE802_11_RADIO
440	#define DLT_IEEE802_11_RADIO 127
441	#endif
442
443	/*
444	* Reserved for TZSP encapsulation.
445	*/
446	#define DLT_TZSP 128 /* Tazmen Sniffer Protocol */
447
448	/*
449	* Reserved for Linux ARCNET.
450	*/
451	#define DLT_ARCNET_LINUX 129
452
453	/*
454	* Juniper-private data link types.
455	*/
456	#define DLT_JUNIPER_MLPPP 130
457	#define DLT_JUNIPER_MLFR 131
458	#define DLT_JUNIPER_ES 132
459	#define DLT_JUNIPER_GGSN 133
460	#define DLT_JUNIPER_MFR 134
461	#define DLT_JUNIPER_ATM2 135
462	#define DLT_JUNIPER_SERVICES 136
463	#define DLT_JUNIPER_ATM1 137
464
465	/*
466	* Apple IP-over-IEEE 1394, as per a request from Dieter Siegmund
467	* <dieter@apple.com>. The header that's presented is an Ethernet-like
468	* header:
469	*
470	* #define FIREWIRE_EUI64_LEN 8
471	* struct firewire_header {
472	* u_char firewire_dhost[FIREWIRE_EUI64_LEN];
473	* u_char firewire_shost[FIREWIRE_EUI64_LEN];
474	* u_short firewire_type;
475	* };
476	*
477	* with "firewire_type" being an Ethernet type value, rather than,
478	* for example, raw GASP frames being handed up.
479	*/
480	#define DLT_APPLE_IP_OVER_IEEE1394 138
481
482	/*
483	* Various SS7 encapsulations, as per a request from Jeff Morriss
484	* <jeff.morriss[AT]ulticom.com> and subsequent discussions.
485	*/
486	#define DLT_MTP2_WITH_PHDR 139 /* pseudo-header with various info, followed by MTP2 */
487	#define DLT_MTP2 140 /* MTP2, without pseudo-header */
488	#define DLT_MTP3 141 /* MTP3, without pseudo-header or MTP2 */
489	#define DLT_SCCP 142 /* SCCP, without pseudo-header or MTP2 or MTP3 */
490
491	/*
492	* Reserved for DOCSIS.
493	*/
494	#define DLT_DOCSIS 143
495
496	/*
497	* Reserved for Linux IrDA.
498	*/
499	#define DLT_LINUX_IRDA 144
500
501	/*
502	* Reserved for IBM SP switch and IBM Next Federation switch.
503	*/
504	#define DLT_IBM_SP 145
505	#define DLT_IBM_SN 146
506
507	/*
508	* Reserved for private use. If you have some link-layer header type
509	* that you want to use within your organization, with the capture files
510	* using that link-layer header type not ever be sent outside your
511	* organization, you can use these values.
512	*
513	* No libpcap release will use these for any purpose, nor will any
514	* tcpdump release use them, either.
515	*
516	* Do NOT use these in capture files that you expect anybody not using
517	* your private versions of capture-file-reading tools to read; in
518	* particular, do NOT use them in products, otherwise you may find that
519	* people won't be able to use tcpdump, or snort, or Ethereal, or... to
520	* read capture files from your firewall/intrusion detection/traffic
521	* monitoring/etc. appliance, or whatever product uses that DLT_ value,
522	* and you may also find that the developers of those applications will
523	* not accept patches to let them read those files.
524	*
525	* Also, do not use them if somebody might send you a capture using them
526	* for their private type and tools using them for your private type
527	* would have to read them.
528	*
529	* Instead, ask "tcpdump-workers@tcpdump.org" for a new DLT_ value,
530	* as per the comment above, and use the type you're given.
531	*/
532	#define DLT_USER0 147
533	#define DLT_USER1 148
534	#define DLT_USER2 149
535	#define DLT_USER3 150
536	#define DLT_USER4 151
537	#define DLT_USER5 152
538	#define DLT_USER6 153
539	#define DLT_USER7 154
540	#define DLT_USER8 155
541	#define DLT_USER9 156
542	#define DLT_USER10 157
543	#define DLT_USER11 158
544	#define DLT_USER12 159
545	#define DLT_USER13 160
546	#define DLT_USER14 161
547	#define DLT_USER15 162
548
549	/*
550	* For future use with 802.11 captures - defined by AbsoluteValue
551	* Systems to store a number of bits of link-layer information
552	* including radio information:
553	*
554	* http://www.shaftnet.org/~pizza/software/capturefrm.txt
555	*
556	* but it might be used by some non-AVS drivers now or in the
557	* future.
558	*/
559	#define DLT_IEEE802_11_RADIO_AVS 163 /* 802.11 plus AVS radio header */
560
561	/*
562	* Juniper-private data link type, as per request from
563	* Hannes Gredler <hannes@juniper.net>. The DLT_s are used
564	* for passing on chassis-internal metainformation such as
565	* QOS profiles, etc..
566	*/
567	#define DLT_JUNIPER_MONITOR 164
568
569	/*
570	* Reserved for BACnet MS/TP.
571	*/
572	#define DLT_BACNET_MS_TP 165
573
574	/*
575	* Another PPP variant as per request from Karsten Keil <kkeil@suse.de>.
576	*
577	* This is used in some OSes to allow a kernel socket filter to distinguish
578	* between incoming and outgoing packets, on a socket intended to
579	* supply pppd with outgoing packets so it can do dial-on-demand and
580	* hangup-on-lack-of-demand; incoming packets are filtered out so they
581	* don't cause pppd to hold the connection up (you don't want random
582	* input packets such as port scans, packets from old lost connections,
583	* etc. to force the connection to stay up).
584	*
585	* The first byte of the PPP header (0xff03) is modified to accomodate
586	* the direction - 0x00 = IN, 0x01 = OUT.
587	*/
588	#define DLT_PPP_PPPD 166
589
590	/*
591	* Names for backwards compatibility with older versions of some PPP
592	* software; new software should use DLT_PPP_PPPD.
593	*/
594	#define DLT_PPP_WITH_DIRECTION DLT_PPP_PPPD
595	#define DLT_LINUX_PPP_WITHDIRECTION DLT_PPP_PPPD
596
597	/*
598	* Juniper-private data link type, as per request from
599	* Hannes Gredler <hannes@juniper.net>. The DLT_s are used
600	* for passing on chassis-internal metainformation such as
601	* QOS profiles, cookies, etc..
602	*/
603	#define DLT_JUNIPER_PPPOE 167
604	#define DLT_JUNIPER_PPPOE_ATM 168
605
606	#define DLT_GPRS_LLC 169 /* GPRS LLC */
607	#define DLT_GPF_T 170 /* GPF-T (ITU-T G.7041/Y.1303) */
608	#define DLT_GPF_F 171 /* GPF-F (ITU-T G.7041/Y.1303) */
609
610	/*
611	* Requested by Oolan Zimmer <oz@gcom.com> for use in Gcom's T1/E1 line
612	* monitoring equipment.
613	*/
614	#define DLT_GCOM_T1E1 172
615	#define DLT_GCOM_SERIAL 173
616
617	/*
618	* Juniper-private data link type, as per request from
619	* Hannes Gredler <hannes@juniper.net>. The DLT_ is used
620	* for internal communication to Physical Interface Cards (PIC)
621	*/
622	#define DLT_JUNIPER_PIC_PEER 174
623
624	/*
625	* Link types requested by Gregor Maier <gregor@endace.com> of Endace
626	* Measurement Systems. They add an ERF header (see
627	* http://www.endace.com/support/EndaceRecordFormat.pdf) in front of
628	* the link-layer header.
629	*/
630	#define DLT_ERF_ETH 175 /* Ethernet */
631	#define DLT_ERF_POS 176 /* Packet-over-SONET */
632
633	/*
634	* Requested by Daniele Orlandi <daniele@orlandi.com> for raw LAPD
635	* for vISDN (http://www.orlandi.com/visdn/). Its link-layer header
636	* includes additional information before the LAPD header, so it's
637	* not necessarily a generic LAPD header.
638	*/
639	#define DLT_LINUX_LAPD 177
640
641	/*
642	* Juniper-private data link type, as per request from
643	* Hannes Gredler <hannes@juniper.net>.
644	* The DLT_ are used for prepending meta-information
645	* like interface index, interface name
646	* before standard Ethernet, PPP, Frelay & C-HDLC Frames
647	*/
648	#define DLT_JUNIPER_ETHER 178
649	#define DLT_JUNIPER_PPP 179
650	#define DLT_JUNIPER_FRELAY 180
651	#define DLT_JUNIPER_CHDLC 181
652
653	/*
654	* Multi Link Frame Relay (FRF.16)
655	*/
656	#define DLT_MFR 182
657
658	/*
659	* Juniper-private data link type, as per request from
660	* Hannes Gredler <hannes@juniper.net>.
661	* The DLT_ is used for internal communication with a
662	* voice Adapter Card (PIC)
663	*/
664	#define DLT_JUNIPER_VP 183
665
666	/*
667	* Arinc 429 frames.
668	* DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>.
669	* Every frame contains a 32bit A429 label.
670	* More documentation on Arinc 429 can be found at
671	* http://www.condoreng.com/support/downloads/tutorials/ARINCTutorial.pdf
672	*/
673	#define DLT_A429 184
674
675	/*
676	* Arinc 653 Interpartition Communication messages.
677	* DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>.
678	* Please refer to the A653-1 standard for more information.
679	*/
680	#define DLT_A653_ICM 185
681
682	/*
683	* USB packets, beginning with a USB setup header; requested by
684	* Paolo Abeni <paolo.abeni@email.it>.
685	*/
686	#define DLT_USB 186
687
688	/*
689	* Bluetooth HCI UART transport layer (part H:4); requested by
690	* Paolo Abeni.
691	*/
692	#define DLT_BLUETOOTH_HCI_H4 187
693
694	/*
695	* IEEE 802.16 MAC Common Part Sublayer; requested by Maria Cruz
696	* <cruz_petagay@bah.com>.
697	*/
698	#define DLT_IEEE802_16_MAC_CPS 188
699
700	/*
701	* USB packets, beginning with a Linux USB header; requested by
702	* Paolo Abeni <paolo.abeni@email.it>.
703	*/
704	#define DLT_USB_LINUX 189
705
706	/*
707	* Controller Area Network (CAN) v. 2.0B packets.
708	* DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>.
709	* Used to dump CAN packets coming from a CAN Vector board.
710	* More documentation on the CAN v2.0B frames can be found at
711	* http://www.can-cia.org/downloads/?269
712	*/
713	#define DLT_CAN20B 190
714
715	/*
716	* IEEE 802.15.4, with address fields padded, as is done by Linux
717	* drivers; requested by Juergen Schimmer.
718	*/
719	#define DLT_IEEE802_15_4_LINUX 191
720
721	/*
722	* Per Packet Information encapsulated packets.
723	* DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>.
724	*/
725	#define DLT_PPI 192
726
727	/*
728	* Header for 802.16 MAC Common Part Sublayer plus a radiotap radio header;
729	* requested by Charles Clancy.
730	*/
731	#define DLT_IEEE802_16_MAC_CPS_RADIO 193
732
733	/*
734	* Juniper-private data link type, as per request from
735	* Hannes Gredler <hannes@juniper.net>.
736	* The DLT_ is used for internal communication with a
737	* integrated service module (ISM).
738	*/
739	#define DLT_JUNIPER_ISM 194
740
741	/*
742	* IEEE 802.15.4, exactly as it appears in the spec (no padding, no
743	* nothing); requested by Mikko Saarnivala <mikko.saarnivala@sensinode.com>.
744	*/
745	#define DLT_IEEE802_15_4 195
746
747	/*
748	* Various link-layer types, with a pseudo-header, for SITA
749	* (http://www.sita.aero/); requested by Fulko Hew (fulko.hew@gmail.com).
750	*/
751	#define DLT_SITA 196
752
753	/*
754	* Various link-layer types, with a pseudo-header, for Endace DAG cards;
755	* encapsulates Endace ERF records. Requested by Stephen Donnelly
756	* <stephen@endace.com>.
757	*/
758	#define DLT_ERF 197
759
760	/*
761	* Special header prepended to Ethernet packets when capturing from a
762	* u10 Networks board. Requested by Phil Mulholland
763	* <phil@u10networks.com>.
764	*/
765	#define DLT_RAIF1 198
766
767	/*
768	* IPMB packet for IPMI, beginning with the I2C slave address, followed
769	* by the netFn and LUN, etc.. Requested by Chanthy Toeung
770	* <chanthy.toeung@ca.kontron.com>.
771	*/
772	#define DLT_IPMB 199
773
774	/*
775	* Juniper-private data link type, as per request from
776	* Hannes Gredler <hannes@juniper.net>.
777	* The DLT_ is used for capturing data on a secure tunnel interface.
778	*/
779	#define DLT_JUNIPER_ST 200
780
781	/*
782	* Bluetooth HCI UART transport layer (part H:4), with pseudo-header
783	* that includes direction information; requested by Paolo Abeni.
784	*/
785	#define DLT_BLUETOOTH_HCI_H4_WITH_PHDR 201
786
787	/*
788	* AX.25 packet with a 1-byte KISS header; see
789	*
790	* http://www.ax25.net/kiss.htm
791	*
792	* as per Richard Stearn <richard@rns-stearn.demon.co.uk>.
793	*/
794	#define DLT_AX25_KISS 202
795
796	/*
797	* LAPD packets from an ISDN channel, starting with the address field,
798	* with no pseudo-header.
799	* Requested by Varuna De Silva <varunax@gmail.com>.
800	*/
801	#define DLT_LAPD 203
802
803	/*
804	* Variants of various link-layer headers, with a one-byte direction
805	* pseudo-header prepended - zero means "received by this host",
806	* non-zero (any non-zero value) means "sent by this host" - as per
807	* Will Barker <w.barker@zen.co.uk>.
808	*/
809	#define DLT_PPP_WITH_DIR 204 /* PPP - don't confuse with DLT_PPP_WITH_DIRECTION */
810	#define DLT_C_HDLC_WITH_DIR 205 /* Cisco HDLC */
811	#define DLT_FRELAY_WITH_DIR 206 /* Frame Relay */
812	#define DLT_LAPB_WITH_DIR 207 /* LAPB */
813
814	/*
815	* 208 is reserved for an as-yet-unspecified proprietary link-layer
816	* type, as requested by Will Barker.
817	*/
818
819	/*
820	* IPMB with a Linux-specific pseudo-header; as requested by Alexey Neyman
821	* <avn@pigeonpoint.com>.
822	*/
823	#define DLT_IPMB_LINUX 209
824
825	/*
826	* FlexRay automotive bus - http://www.flexray.com/ - as requested
827	* by Hannes Kaelber <hannes.kaelber@x2e.de>.
828	*/
829	#define DLT_FLEXRAY 210
830
831	/*
832	* Media Oriented Systems Transport (MOST) bus for multimedia
833	* transport - http://www.mostcooperation.com/ - as requested
834	* by Hannes Kaelber <hannes.kaelber@x2e.de>.
835	*/
836	#define DLT_MOST 211
837
838	/*
839	* Local Interconnect Network (LIN) bus for vehicle networks -
840	* http://www.lin-subbus.org/ - as requested by Hannes Kaelber
841	* <hannes.kaelber@x2e.de>.
842	*/
843	#define DLT_LIN 212
844
845	/*
846	* X2E-private data link type used for serial line capture,
847	* as requested by Hannes Kaelber <hannes.kaelber@x2e.de>.
848	*/
849	#define DLT_X2E_SERIAL 213
850
851	/*
852	* X2E-private data link type used for the Xoraya data logger
853	* family, as requested by Hannes Kaelber <hannes.kaelber@x2e.de>.
854	*/
855	#define DLT_X2E_XORAYA 214
856
857	/*
858	* IEEE 802.15.4, exactly as it appears in the spec (no padding, no
859	* nothing), but with the PHY-level data for non-ASK PHYs (4 octets
860	* of 0 as preamble, one octet of SFD, one octet of frame length+
861	* reserved bit, and then the MAC-layer data, starting with the
862	* frame control field).
863	*
864	* Requested by Max Filippov <jcmvbkbc@gmail.com>.
865	*/
866	#define DLT_IEEE802_15_4_NONASK_PHY 215
867
868	/*
869	* David Gibson <david@gibson.dropbear.id.au> requested this for
870	* captures from the Linux kernel /dev/input/eventN devices. This
871	* is used to communicate keystrokes and mouse movements from the
872	* Linux kernel to display systems, such as Xorg.
873	*/
874	#define DLT_LINUX_EVDEV 216
875
876	/*
877	* GSM Um and Abis interfaces, preceded by a "gsmtap" header.
878	*
879	* Requested by Harald Welte <laforge@gnumonks.org>.
880	*/
881	#define DLT_GSMTAP_UM 217
882	#define DLT_GSMTAP_ABIS 218
883
884	/*
885	* MPLS, with an MPLS label as the link-layer header.
886	* Requested by Michele Marchetto <michele@openbsd.org> on behalf
887	* of OpenBSD.
888	*/
889	#define DLT_MPLS 219
890
891	/*
892	* USB packets, beginning with a Linux USB header, with the USB header
893	* padded to 64 bytes; required for memory-mapped access.
894	*/
895	#define DLT_USB_LINUX_MMAPPED 220
896
897	/*
898	* DECT packets, with a pseudo-header; requested by
899	* Matthias Wenzel <tcpdump@mazzoo.de>.
900	*/
901	#define DLT_DECT 221
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	* Solaris ipnet pseudo-header; requested by Darren Reed <Darren.Reed@Sun.COM>.
943	*
944	* The pseudo-header starts with a one-byte version number; for version 2,
945	* the pseudo-header is:
946	*
947	* struct dl_ipnetinfo {
948	* u_int8_t dli_version;
949	* u_int8_t dli_family;
950	* u_int16_t dli_htype;
951	* u_int32_t dli_pktlen;
952	* u_int32_t dli_ifindex;
953	* u_int32_t dli_grifindex;
954	* u_int32_t dli_zsrc;
955	* u_int32_t dli_zdst;
956	* };
957	*
958	* dli_version is 2 for the current version of the pseudo-header.
959	*
960	* dli_family is a Solaris address family value, so it's 2 for IPv4
961	* and 26 for IPv6.
962	*
963	* dli_htype is a "hook type" - 0 for incoming packets, 1 for outgoing
964	* packets, and 2 for packets arriving from another zone on the same
965	* machine.
966	*
967	* dli_pktlen is the length of the packet data following the pseudo-header
968	* (so the captured length minus dli_pktlen is the length of the
969	* pseudo-header, assuming the entire pseudo-header was captured).
970	*
971	* dli_ifindex is the interface index of the interface on which the
972	* packet arrived.
973	*
974	* dli_grifindex is the group interface index number (for IPMP interfaces).
975	*
976	* dli_zsrc is the zone identifier for the source of the packet.
977	*
978	* dli_zdst is the zone identifier for the destination of the packet.
979	*
980	* A zone number of 0 is the global zone; a zone number of 0xffffffff
981	* means that the packet arrived from another host on the network, not
982	* from another zone on the same machine.
983	*
984	* An IPv4 or IPv6 datagram follows the pseudo-header; dli_family indicates
985	* which of those it is.
986	*/
987	#define DLT_IPNET 226
988
989	/*
990	* CAN (Controller Area Network) frames, with a pseudo-header as supplied
991	* by Linux SocketCAN. See Documentation/networking/can.txt in the Linux
992	* source.
993	*
994	* Requested by Felix Obenhuber <felix@obenhuber.de>.
995	*/
996	#define DLT_CAN_SOCKETCAN 227
997
998	/*
999	* Raw IPv4/IPv6; different from DLT_RAW in that the DLT_ value specifies
1000	* whether it's v4 or v6. Requested by Darren Reed <Darren.Reed@Sun.COM>.
1001	*/
1002	#define DLT_IPV4 228
1003	#define DLT_IPV6 229
1004
1005	/*
1006	* IEEE 802.15.4, exactly as it appears in the spec (no padding, no
1007	* nothing), and with no FCS at the end of the frame; requested by
1008	* Jon Smirl <jonsmirl@gmail.com>.
1009	*/
1010	#define DLT_IEEE802_15_4_NOFCS 230
1011
1012	/*
1013	* Raw D-Bus:
1014	*
1015	* http://www.freedesktop.org/wiki/Software/dbus
1016	*
1017	* messages:
1018	*
1019	* http://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-messages
1020	*
1021	* starting with the endianness flag, followed by the message type, etc.,
1022	* but without the authentication handshake before the message sequence:
1023	*
1024	* http://dbus.freedesktop.org/doc/dbus-specification.html#auth-protocol
1025	*
1026	* Requested by Martin Vidner <martin@vidner.net>.
1027	*/
1028	#define DLT_DBUS 231
1029
1030	/*
1031	* Juniper-private data link type, as per request from
1032	* Hannes Gredler <hannes@juniper.net>.
1033	*/
1034	#define DLT_JUNIPER_VS 232
1035	#define DLT_JUNIPER_SRX_E2E 233
1036	#define DLT_JUNIPER_FIBRECHANNEL 234
1037
1038	/*
1039	* DVB-CI (DVB Common Interface for communication between a PC Card
1040	* module and a DVB receiver). See
1041	*
1042	* http://www.kaiser.cx/pcap-dvbci.html
1043	*
1044	* for the specification.
1045	*
1046	* Requested by Martin Kaiser <martin@kaiser.cx>.
1047	*/
1048	#define DLT_DVB_CI 235
1049
1050	/*
1051	* Variant of 3GPP TS 27.010 multiplexing protocol (similar to, but
1052	* not the same as, 27.010). Requested by Hans-Christoph Schemmel
1053	* <hans-christoph.schemmel@cinterion.com>.
1054	*/
1055	#define DLT_MUX27010 236
1056
1057	/*
1058	* STANAG 5066 D_PDUs. Requested by M. Baris Demiray
1059	* <barisdemiray@gmail.com>.
1060	*/
1061	#define DLT_STANAG_5066_D_PDU 237
1062
1063	/*
1064	* Juniper-private data link type, as per request from
1065	* Hannes Gredler <hannes@juniper.net>.
1066	*/
1067	#define DLT_JUNIPER_ATM_CEMIC 238
1068
1069	/*
1070	* NetFilter LOG messages
1071	* (payload of netlink NFNL_SUBSYS_ULOG/NFULNL_MSG_PACKET packets)
1072	*
1073	* Requested by Jakub Zawadzki <darkjames-ws@darkjames.pl>
1074	*/
1075	#define DLT_NFLOG 239
1076
1077	/*
1078	* Hilscher Gesellschaft fuer Systemautomation mbH link-layer type
1079	* for Ethernet packets with a 4-byte pseudo-header and always
1080	* with the payload including the FCS, as supplied by their
1081	* netANALYZER hardware and software.
1082	*
1083	* Requested by Holger P. Frommer <HPfrommer@hilscher.com>
1084	*/
1085	#define DLT_NETANALYZER 240
1086
1087	/*
1088	* Hilscher Gesellschaft fuer Systemautomation mbH link-layer type
1089	* for Ethernet packets with a 4-byte pseudo-header and FCS and
1090	* with the Ethernet header preceded by 7 bytes of preamble and
1091	* 1 byte of SFD, as supplied by their netANALYZER hardware and
1092	* software.
1093	*
1094	* Requested by Holger P. Frommer <HPfrommer@hilscher.com>
1095	*/
1096	#define DLT_NETANALYZER_TRANSPARENT 241
1097
1098	/*
1099	* IP-over-Infiniband, as specified by RFC 4391.
1100	*
1101	* Requested by Petr Sumbera <petr.sumbera@oracle.com>.
1102	*/
1103	#define DLT_IPOIB 242
1104
1105	/*
1106	* MPEG-2 transport stream (ISO 13818-1/ITU-T H.222.0).
1107	*
1108	* Requested by Guy Martin <gmsoft@tuxicoman.be>.
1109	*/
1110	#define DLT_MPEG_2_TS 243
1111
1112	/*
1113	* ng4T GmbH's UMTS Iub/Iur-over-ATM and Iub/Iur-over-IP format as
1114	* used by their ng40 protocol tester.
1115	*
1116	* Requested by Jens Grimmer <jens.grimmer@ng4t.com>.
1117	*/
1118	#define DLT_NG40 244
1119
1120	/*
1121	* Pseudo-header giving adapter number and flags, followed by an NFC
1122	* (Near-Field Communications) Logical Link Control Protocol (LLCP) PDU,
1123	* as specified by NFC Forum Logical Link Control Protocol Technical
1124	* Specification LLCP 1.1.
1125	*
1126	* Requested by Mike Wakerly <mikey@google.com>.
1127	*/
1128	#define DLT_NFC_LLCP 245
1129
1130	/*
1131	* 245 is used as LINKTYPE_PFSYNC; do not use it for any other purpose.
1132	*
1133	* DLT_PFSYNC has different values on different platforms, and all of
1134	* them collide with something used elsewhere. On platforms that
1135	* don't already define it, define it as 245.
1136	*/
1137	#if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__) && !defined(__DragonFly__) && !defined(__APPLE__)
1138	#define DLT_PFSYNC 246
1139	#endif
1140
1141	#define DLT_MATCHING_MAX 246 /* highest value in the "matching" range */
1142
1143	/*
1144	* DLT and savefile link type values are split into a class and
1145	* a member of that class. A class value of 0 indicates a regular
1146	* DLT_/LINKTYPE_ value.
1147	*/
1148	#define DLT_CLASS(x) ((x) & 0x03ff0000)
1149
1150	/*
1151	* The instruction encodings.
1152	*/
1153	/* instruction classes */
1154	#define BPF_CLASS(code) ((code) & 0x07)
1155	#define BPF_LD 0x00
1156	#define BPF_LDX 0x01
1157	#define BPF_ST 0x02
1158	#define BPF_STX 0x03
1159	#define BPF_ALU 0x04
1160	#define BPF_JMP 0x05
1161	#define BPF_RET 0x06
1162	#define BPF_MISC 0x07
1163
1164	/* ld/ldx fields */
1165	#define BPF_SIZE(code) ((code) & 0x18)
1166	#define BPF_W 0x00
1167	#define BPF_H 0x08
1168	#define BPF_B 0x10
1169	#define BPF_MODE(code) ((code) & 0xe0)
1170	#define BPF_IMM 0x00
1171	#define BPF_ABS 0x20
1172	#define BPF_IND 0x40
1173	#define BPF_MEM 0x60
1174	#define BPF_LEN 0x80
1175	#define BPF_MSH 0xa0
1176
1177	/* alu/jmp fields */
1178	#define BPF_OP(code) ((code) & 0xf0)
1179	#define BPF_ADD 0x00
1180	#define BPF_SUB 0x10
1181	#define BPF_MUL 0x20
1182	#define BPF_DIV 0x30
1183	#define BPF_OR 0x40
1184	#define BPF_AND 0x50
1185	#define BPF_LSH 0x60
1186	#define BPF_RSH 0x70
1187	#define BPF_NEG 0x80
1188	#define BPF_JA 0x00
1189	#define BPF_JEQ 0x10
1190	#define BPF_JGT 0x20
1191	#define BPF_JGE 0x30
1192	#define BPF_JSET 0x40
1193	#define BPF_SRC(code) ((code) & 0x08)
1194	#define BPF_K 0x00
1195	#define BPF_X 0x08
1196
1197	/* ret - BPF_K and BPF_X also apply */
1198	#define BPF_RVAL(code) ((code) & 0x18)
1199	#define BPF_A 0x10
1200
1201	/* misc */
1202	#define BPF_MISCOP(code) ((code) & 0xf8)
1203	#define BPF_TAX 0x00
1204	#define BPF_TXA 0x80
1205
1206	/*
1207	* The instruction data structure.
1208	*/
1209	struct bpf_insn {
1210	u_short code;
1211	u_char jt;
1212	u_char jf;
1213	bpf_u_int32 k;
1214	};
1215
1216	/*
1217	* Macros for insn array initializers.
1218	*/
1219	#define BPF_STMT(code, k) { (u_short)(code), 0, 0, k }
1220	#define BPF_JUMP(code, k, jt, jf) { (u_short)(code), jt, jf, k }
1221
1222	/*
1223	* Structure to retrieve available DLTs for the interface.
1224	*/
1225	struct bpf_dltlist {
1226	u_int bfl_len; /* number of bfd_list array */
1227	u_int bfl_list; / array of DLTs */
1228	};
1229
1230	#ifdef _KERNEL
1231	#ifdef MALLOC_DECLARE
1232	MALLOC_DECLARE(M_BPF);
1233	#endif
1234	#ifdef SYSCTL_DECL
1235	SYSCTL_DECL(_net_bpf);
1236	#endif
1237
1238	/*
1239	* Rotate the packet buffers in descriptor d. Move the store buffer into the
1240	* hold slot, and the free buffer ino the store slot. Zero the length of the
1241	* new store buffer. Descriptor lock should be held. Hold buffer must
1242	* not be marked "in use".
1243	*/
1244	#define ROTATE_BUFFERS(d) do { \
1245	(d)->bd_hbuf = (d)->bd_sbuf; \
1246	(d)->bd_hlen = (d)->bd_slen; \
1247	(d)->bd_sbuf = (d)->bd_fbuf; \
1248	(d)->bd_slen = 0; \
1249	(d)->bd_fbuf = NULL; \
1250	bpf_bufheld(d); \
1251	} while (0)
1252
1253	/*
1254	* Descriptor associated with each attached hardware interface.
1255	* FIXME: this structure is exposed to external callers to speed up
1256	* bpf_peers_present() call. However we cover all fields not needed by
1257	* this function via BPF_INTERNAL define
1258	*/
1259	struct bpf_if {
1260	LIST_ENTRY(bpf_if) bif_next; /* list of all interfaces */
1261	LIST_HEAD(, bpf_d) bif_dlist; /* descriptor list */
1262	#ifdef BPF_INTERNAL
1263	u_int bif_dlt; /* link layer type */
1264	u_int bif_hdrlen; /* length of link header */
1265	struct ifnet bif_ifp; / corresponding interface */
1266	struct rwlock bif_lock; /* interface lock */
1267	LIST_HEAD(, bpf_d) bif_wlist; /* writer-only list */
1268	int flags; /* Interface flags */
1269	#endif
1270	};
1271
1272	void bpf_bufheld(struct bpf_d *d);
1273	int bpf_validate(const struct bpf_insn *, int);
1274	void bpf_tap(struct bpf_if , u_char , u_int);
1275	void bpf_mtap(struct bpf_if , struct mbuf );
1276	void bpf_mtap2(struct bpf_if , void , u_int, struct mbuf *);
1277	void bpfattach(struct ifnet *, u_int, u_int);
1278	void bpfattach2(struct ifnet , u_int, u_int, struct bpf_if *);
1279	void bpfdetach(struct ifnet *);
1280
1281	void bpfilterattach(int);
1282	u_int bpf_filter(const struct bpf_insn , u_char , u_int, u_int);
1283
1284	static __inline int
1285	bpf_peers_present(struct bpf_if *bpf)
1286	{
1287
1288	if (!LIST_EMPTY(&bpf->bif_dlist))
1289	return (1);
1290	return (0);
1291	}
1292
1293	#define BPF_TAP(_ifp,_pkt,_pktlen) do { \
1294	if (bpf_peers_present((_ifp)->if_bpf)) \
1295	bpf_tap((_ifp)->if_bpf, (_pkt), (_pktlen)); \
1296	} while (0)
1297	#define BPF_MTAP(_ifp,_m) do { \
1298	if (bpf_peers_present((_ifp)->if_bpf)) { \
1299	M_ASSERTVALID(_m); \
1300	bpf_mtap((_ifp)->if_bpf, (_m)); \
1301	} \
1302	} while (0)
1303	#define BPF_MTAP2(_ifp,_data,_dlen,_m) do { \
1304	if (bpf_peers_present((_ifp)->if_bpf)) { \
1305	M_ASSERTVALID(_m); \
1306	bpf_mtap2((_ifp)->if_bpf,(_data),(_dlen),(_m)); \
1307	} \
1308	} while (0)
1309	#endif
1310
1311	/*
1312	* Number of scratch memory words (for BPF_LD\|BPF_MEM and BPF_ST).
1313	*/
1314	#define BPF_MEMWORDS 16
1315
1316	#endif /* _NET_BPF_H_ */

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source: rtems-libbsd/freebsd/sys/net/bpf.h @ c4ee445

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