2 * Copyright (c) 1990, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
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
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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.
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
34 * @(#)bpf.h 8.1 (Berkeley) 6/10/93
35 * @(#)bpf.h 1.34 (LBL) 6/16/96
43 /* BSD style release date */
44 #define BPF_RELEASE 199606
46 typedef int32_t bpf_int32;
47 typedef u_int32_t bpf_u_int32;
48 typedef int64_t bpf_int64;
49 typedef u_int64_t bpf_u_int64;
52 * Alignment macros. BPF_WORDALIGN rounds up to the next
53 * even multiple of BPF_ALIGNMENT.
55 #define BPF_ALIGNMENT sizeof(long)
56 #define BPF_WORDALIGN(x) (((x)+(BPF_ALIGNMENT-1))&~(BPF_ALIGNMENT-1))
58 #define BPF_MAXINSNS 512
59 #define BPF_MAXBUFSIZE 0x80000
60 #define BPF_MINBUFSIZE 32
63 * Structure for BIOCSETF.
67 struct bpf_insn *bf_insns;
71 * Struct returned by BIOCGSTATS.
74 u_int bs_recv; /* number of packets received */
75 u_int bs_drop; /* number of packets dropped */
79 * Struct return by BIOCVERSION. This represents the version number of
80 * the filter language described by the instruction encodings below.
81 * bpf understands a program iff kernel_major == filter_major &&
82 * kernel_minor >= filter_minor, that is, if the value returned by the
83 * running kernel has the same major number and a minor number equal
84 * equal to or less than the filter being downloaded. Otherwise, the
85 * results are undefined, meaning an error may be returned or packets
86 * may be accepted haphazardly.
87 * It has nothing to do with the source code version.
93 /* Current version number of filter architecture. */
94 #define BPF_MAJOR_VERSION 1
95 #define BPF_MINOR_VERSION 1
98 * Historically, BPF has supported a single buffering model, first using mbuf
99 * clusters in kernel, and later using malloc(9) buffers in kernel. We now
100 * support multiple buffering modes, which may be queried and set using
101 * BIOCGETBUFMODE and BIOCSETBUFMODE. So as to avoid handling the complexity
102 * of changing modes while sniffing packets, the mode becomes fixed once an
103 * interface has been attached to the BPF descriptor.
105 #define BPF_BUFMODE_BUFFER 1 /* Kernel buffers with read(). */
106 #define BPF_BUFMODE_ZBUF 2 /* Zero-copy buffers. */
109 * Struct used by BIOCSETZBUF, BIOCROTZBUF: describes up to two zero-copy
110 * buffer as used by BPF.
113 void *bz_bufa; /* Location of 'a' zero-copy buffer. */
114 void *bz_bufb; /* Location of 'b' zero-copy buffer. */
115 size_t bz_buflen; /* Size of zero-copy buffers. */
118 #define BIOCGBLEN _IOR('B', 102, u_int)
119 #define BIOCSBLEN _IOWR('B', 102, u_int)
120 #define BIOCSETF _IOW('B', 103, struct bpf_program)
121 #define BIOCFLUSH _IO('B', 104)
122 #define BIOCPROMISC _IO('B', 105)
123 #define BIOCGDLT _IOR('B', 106, u_int)
124 #define BIOCGETIF _IOR('B', 107, struct ifreq)
125 #define BIOCSETIF _IOW('B', 108, struct ifreq)
126 #define BIOCSRTIMEOUT _IOW('B', 109, struct timeval)
127 #define BIOCGRTIMEOUT _IOR('B', 110, struct timeval)
128 #define BIOCGSTATS _IOR('B', 111, struct bpf_stat)
129 #define BIOCIMMEDIATE _IOW('B', 112, u_int)
130 #define BIOCVERSION _IOR('B', 113, struct bpf_version)
131 #define BIOCGRSIG _IOR('B', 114, u_int)
132 #define BIOCSRSIG _IOW('B', 115, u_int)
133 #define BIOCGHDRCMPLT _IOR('B', 116, u_int)
134 #define BIOCSHDRCMPLT _IOW('B', 117, u_int)
135 #define BIOCGDIRECTION _IOR('B', 118, u_int)
136 #define BIOCSDIRECTION _IOW('B', 119, u_int)
137 #define BIOCSDLT _IOW('B', 120, u_int)
138 #define BIOCGDLTLIST _IOWR('B', 121, struct bpf_dltlist)
139 #define BIOCLOCK _IO('B', 122)
140 #define BIOCSETWF _IOW('B', 123, struct bpf_program)
141 #define BIOCFEEDBACK _IOW('B', 124, u_int)
142 #define BIOCGETBUFMODE _IOR('B', 125, u_int)
143 #define BIOCSETBUFMODE _IOW('B', 126, u_int)
144 #define BIOCGETZMAX _IOR('B', 127, size_t)
145 #define BIOCROTZBUF _IOR('B', 128, struct bpf_zbuf)
146 #define BIOCSETZBUF _IOW('B', 129, struct bpf_zbuf)
147 #define BIOCSETFNR _IOW('B', 130, struct bpf_program)
148 #define BIOCGTSTAMP _IOR('B', 131, u_int)
149 #define BIOCSTSTAMP _IOW('B', 132, u_int)
152 #define BIOCGSEESENT BIOCGDIRECTION
153 #define BIOCSSEESENT BIOCSDIRECTION
155 /* Packet directions */
157 BPF_D_IN, /* See incoming packets */
158 BPF_D_INOUT, /* See incoming and outgoing packets */
159 BPF_D_OUT /* See outgoing packets */
162 /* Time stamping functions */
163 #define BPF_T_MICROTIME 0x0000
164 #define BPF_T_NANOTIME 0x0001
165 #define BPF_T_BINTIME 0x0002
166 #define BPF_T_NONE 0x0003
167 #define BPF_T_FORMAT_MASK 0x0003
168 #define BPF_T_NORMAL 0x0000
169 #define BPF_T_FAST 0x0100
170 #define BPF_T_MONOTONIC 0x0200
171 #define BPF_T_MONOTONIC_FAST (BPF_T_FAST | BPF_T_MONOTONIC)
172 #define BPF_T_FLAG_MASK 0x0300
173 #define BPF_T_FORMAT(t) ((t) & BPF_T_FORMAT_MASK)
174 #define BPF_T_FLAG(t) ((t) & BPF_T_FLAG_MASK)
175 #define BPF_T_VALID(t) \
176 ((t) == BPF_T_NONE || (BPF_T_FORMAT(t) != BPF_T_NONE && \
177 ((t) & ~(BPF_T_FORMAT_MASK | BPF_T_FLAG_MASK)) == 0))
179 #define BPF_T_MICROTIME_FAST (BPF_T_MICROTIME | BPF_T_FAST)
180 #define BPF_T_NANOTIME_FAST (BPF_T_NANOTIME | BPF_T_FAST)
181 #define BPF_T_BINTIME_FAST (BPF_T_BINTIME | BPF_T_FAST)
182 #define BPF_T_MICROTIME_MONOTONIC (BPF_T_MICROTIME | BPF_T_MONOTONIC)
183 #define BPF_T_NANOTIME_MONOTONIC (BPF_T_NANOTIME | BPF_T_MONOTONIC)
184 #define BPF_T_BINTIME_MONOTONIC (BPF_T_BINTIME | BPF_T_MONOTONIC)
185 #define BPF_T_MICROTIME_MONOTONIC_FAST (BPF_T_MICROTIME | BPF_T_MONOTONIC_FAST)
186 #define BPF_T_NANOTIME_MONOTONIC_FAST (BPF_T_NANOTIME | BPF_T_MONOTONIC_FAST)
187 #define BPF_T_BINTIME_MONOTONIC_FAST (BPF_T_BINTIME | BPF_T_MONOTONIC_FAST)
190 * Structure prepended to each packet.
193 bpf_int64 bt_sec; /* seconds */
194 bpf_u_int64 bt_frac; /* fraction */
197 struct bpf_ts bh_tstamp; /* time stamp */
198 bpf_u_int32 bh_caplen; /* length of captured portion */
199 bpf_u_int32 bh_datalen; /* original length of packet */
200 u_short bh_hdrlen; /* length of bpf header (this struct
201 plus alignment padding) */
205 struct timeval bh_tstamp; /* time stamp */
206 bpf_u_int32 bh_caplen; /* length of captured portion */
207 bpf_u_int32 bh_datalen; /* original length of packet */
208 u_short bh_hdrlen; /* length of bpf header (this struct
209 plus alignment padding) */
212 #define MTAG_BPF 0x627066
213 #define MTAG_BPF_TIMESTAMP 0
217 * When using zero-copy BPF buffers, a shared memory header is present
218 * allowing the kernel BPF implementation and user process to synchronize
219 * without using system calls. This structure defines that header. When
220 * accessing these fields, appropriate atomic operation and memory barriers
221 * are required in order not to see stale or out-of-order data; see bpf(4)
222 * for reference code to access these fields from userspace.
224 * The layout of this structure is critical, and must not be changed; if must
225 * fit in a single page on all architectures.
227 struct bpf_zbuf_header {
228 volatile u_int bzh_kernel_gen; /* Kernel generation number. */
229 volatile u_int bzh_kernel_len; /* Length of data in the buffer. */
230 volatile u_int bzh_user_gen; /* User generation number. */
235 * Data-link level type codes.
237 #define DLT_NULL 0 /* BSD loopback encapsulation */
238 #define DLT_EN10MB 1 /* Ethernet (10Mb) */
239 #define DLT_EN3MB 2 /* Experimental Ethernet (3Mb) */
240 #define DLT_AX25 3 /* Amateur Radio AX.25 */
241 #define DLT_PRONET 4 /* Proteon ProNET Token Ring */
242 #define DLT_CHAOS 5 /* Chaos */
243 #define DLT_IEEE802 6 /* IEEE 802 Networks */
244 #define DLT_ARCNET 7 /* ARCNET */
245 #define DLT_SLIP 8 /* Serial Line IP */
246 #define DLT_PPP 9 /* Point-to-point Protocol */
247 #define DLT_FDDI 10 /* FDDI */
248 #define DLT_ATM_RFC1483 11 /* LLC/SNAP encapsulated atm */
249 #define DLT_RAW 12 /* raw IP */
252 * These are values from BSD/OS's "bpf.h".
253 * These are not the same as the values from the traditional libpcap
254 * "bpf.h"; however, these values shouldn't be generated by any
255 * OS other than BSD/OS, so the correct values to use here are the
258 * Platforms that have already assigned these values to other
259 * DLT_ codes, however, should give these codes the values
260 * from that platform, so that programs that use these codes will
261 * continue to compile - even though they won't correctly read
262 * files of these types.
264 #define DLT_SLIP_BSDOS 15 /* BSD/OS Serial Line IP */
265 #define DLT_PPP_BSDOS 16 /* BSD/OS Point-to-point Protocol */
267 #define DLT_ATM_CLIP 19 /* Linux Classical-IP over ATM */
270 * These values are defined by NetBSD; other platforms should refrain from
271 * using them for other purposes, so that NetBSD savefiles with link
272 * types of 50 or 51 can be read as this type on all platforms.
274 #define DLT_PPP_SERIAL 50 /* PPP over serial with HDLC encapsulation */
275 #define DLT_PPP_ETHER 51 /* PPP over Ethernet */
278 * Reserved for the Symantec Enterprise Firewall.
280 #define DLT_SYMANTEC_FIREWALL 99
283 * Values between 100 and 103 are used in capture file headers as
284 * link-layer header type LINKTYPE_ values corresponding to DLT_ types
285 * that differ between platforms; don't use those values for new DLT_
290 * Values starting with 104 are used for newly-assigned link-layer
291 * header type values; for those link-layer header types, the DLT_
292 * value returned by pcap_datalink() and passed to pcap_open_dead(),
293 * and the LINKTYPE_ value that appears in capture files, are the
296 * DLT_MATCHING_MIN is the lowest such value; DLT_MATCHING_MAX is
297 * the highest such value.
299 #define DLT_MATCHING_MIN 104
302 * This value was defined by libpcap 0.5; platforms that have defined
303 * it with a different value should define it here with that value -
304 * a link type of 104 in a save file will be mapped to DLT_C_HDLC,
305 * whatever value that happens to be, so programs will correctly
306 * handle files with that link type regardless of the value of
309 * The name DLT_C_HDLC was used by BSD/OS; we use that name for source
310 * compatibility with programs written for BSD/OS.
312 * libpcap 0.5 defined it as DLT_CHDLC; we define DLT_CHDLC as well,
313 * for source compatibility with programs written for libpcap 0.5.
315 #define DLT_C_HDLC 104 /* Cisco HDLC */
316 #define DLT_CHDLC DLT_C_HDLC
318 #define DLT_IEEE802_11 105 /* IEEE 802.11 wireless */
321 * Values between 106 and 107 are used in capture file headers as
322 * link-layer types corresponding to DLT_ types that might differ
323 * between platforms; don't use those values for new DLT_ new types.
327 * Frame Relay; BSD/OS has a DLT_FR with a value of 11, but that collides
329 * DLT_FR and DLT_FRELAY packets start with the Q.922 Frame Relay header
332 #define DLT_FRELAY 107
335 * OpenBSD DLT_LOOP, for loopback devices; it's like DLT_NULL, except
336 * that the AF_ type in the link-layer header is in network byte order.
338 * OpenBSD defines it as 12, but that collides with DLT_RAW, so we
339 * define it as 108 here. If OpenBSD picks up this file, it should
340 * define DLT_LOOP as 12 in its version, as per the comment above -
341 * and should not use 108 as a DLT_ value.
346 * Values between 109 and 112 are used in capture file headers as
347 * link-layer types corresponding to DLT_ types that might differ
348 * between platforms; don't use those values for new DLT_ new types.
352 * Encapsulated packets for IPsec; DLT_ENC is 13 in OpenBSD, but that's
353 * DLT_SLIP_BSDOS in NetBSD, so we don't use 13 for it in OSes other
359 * This is for Linux cooked sockets.
361 #define DLT_LINUX_SLL 113
364 * Apple LocalTalk hardware.
366 #define DLT_LTALK 114
371 #define DLT_ECONET 115
374 * Reserved for use with OpenBSD ipfilter.
376 #define DLT_IPFILTER 116
379 * Reserved for use in capture-file headers as a link-layer type
380 * corresponding to OpenBSD DLT_PFLOG; DLT_PFLOG is 17 in OpenBSD,
381 * but that's DLT_LANE8023 in SuSE 6.3, so we can't use 17 for it
382 * in capture-file headers.
384 #define DLT_PFLOG 117
387 * Registered for Cisco-internal use.
389 #define DLT_CISCO_IOS 118
392 * Reserved for 802.11 cards using the Prism II chips, with a link-layer
393 * header including Prism monitor mode information plus an 802.11
396 #define DLT_PRISM_HEADER 119
399 * Reserved for Aironet 802.11 cards, with an Aironet link-layer header
400 * (see Doug Ambrisko's FreeBSD patches).
402 #define DLT_AIRONET_HEADER 120
405 * Reserved for use by OpenBSD's pfsync device.
407 #define DLT_PFSYNC 121
410 * Reserved for Siemens HiPath HDLC. XXX
412 #define DLT_HHDLC 121
415 * Reserved for RFC 2625 IP-over-Fibre Channel.
417 #define DLT_IP_OVER_FC 122
420 * Reserved for Full Frontal ATM on Solaris.
422 #define DLT_SUNATM 123
425 * Reserved as per request from Kent Dahlgren <kent@praesum.com>
428 #define DLT_RIO 124 /* RapidIO */
429 #define DLT_PCI_EXP 125 /* PCI Express */
430 #define DLT_AURORA 126 /* Xilinx Aurora link layer */
433 * BSD header for 802.11 plus a number of bits of link-layer information
434 * including radio information.
436 #ifndef DLT_IEEE802_11_RADIO
437 #define DLT_IEEE802_11_RADIO 127
441 * Reserved for TZSP encapsulation.
443 #define DLT_TZSP 128 /* Tazmen Sniffer Protocol */
446 * Reserved for Linux ARCNET.
448 #define DLT_ARCNET_LINUX 129
451 * Juniper-private data link types.
453 #define DLT_JUNIPER_MLPPP 130
454 #define DLT_JUNIPER_MLFR 131
455 #define DLT_JUNIPER_ES 132
456 #define DLT_JUNIPER_GGSN 133
457 #define DLT_JUNIPER_MFR 134
458 #define DLT_JUNIPER_ATM2 135
459 #define DLT_JUNIPER_SERVICES 136
460 #define DLT_JUNIPER_ATM1 137
463 * Apple IP-over-IEEE 1394, as per a request from Dieter Siegmund
464 * <dieter@apple.com>. The header that's presented is an Ethernet-like
467 * #define FIREWIRE_EUI64_LEN 8
468 * struct firewire_header {
469 * u_char firewire_dhost[FIREWIRE_EUI64_LEN];
470 * u_char firewire_shost[FIREWIRE_EUI64_LEN];
471 * u_short firewire_type;
474 * with "firewire_type" being an Ethernet type value, rather than,
475 * for example, raw GASP frames being handed up.
477 #define DLT_APPLE_IP_OVER_IEEE1394 138
480 * Various SS7 encapsulations, as per a request from Jeff Morriss
481 * <jeff.morriss[AT]ulticom.com> and subsequent discussions.
483 #define DLT_MTP2_WITH_PHDR 139 /* pseudo-header with various info, followed by MTP2 */
484 #define DLT_MTP2 140 /* MTP2, without pseudo-header */
485 #define DLT_MTP3 141 /* MTP3, without pseudo-header or MTP2 */
486 #define DLT_SCCP 142 /* SCCP, without pseudo-header or MTP2 or MTP3 */
489 * Reserved for DOCSIS.
491 #define DLT_DOCSIS 143
494 * Reserved for Linux IrDA.
496 #define DLT_LINUX_IRDA 144
499 * Reserved for IBM SP switch and IBM Next Federation switch.
501 #define DLT_IBM_SP 145
502 #define DLT_IBM_SN 146
505 * Reserved for private use. If you have some link-layer header type
506 * that you want to use within your organization, with the capture files
507 * using that link-layer header type not ever be sent outside your
508 * organization, you can use these values.
510 * No libpcap release will use these for any purpose, nor will any
511 * tcpdump release use them, either.
513 * Do *NOT* use these in capture files that you expect anybody not using
514 * your private versions of capture-file-reading tools to read; in
515 * particular, do *NOT* use them in products, otherwise you may find that
516 * people won't be able to use tcpdump, or snort, or Ethereal, or... to
517 * read capture files from your firewall/intrusion detection/traffic
518 * monitoring/etc. appliance, or whatever product uses that DLT_ value,
519 * and you may also find that the developers of those applications will
520 * not accept patches to let them read those files.
522 * Also, do not use them if somebody might send you a capture using them
523 * for *their* private type and tools using them for *your* private type
524 * would have to read them.
526 * Instead, ask "tcpdump-workers@tcpdump.org" for a new DLT_ value,
527 * as per the comment above, and use the type you're given.
529 #define DLT_USER0 147
530 #define DLT_USER1 148
531 #define DLT_USER2 149
532 #define DLT_USER3 150
533 #define DLT_USER4 151
534 #define DLT_USER5 152
535 #define DLT_USER6 153
536 #define DLT_USER7 154
537 #define DLT_USER8 155
538 #define DLT_USER9 156
539 #define DLT_USER10 157
540 #define DLT_USER11 158
541 #define DLT_USER12 159
542 #define DLT_USER13 160
543 #define DLT_USER14 161
544 #define DLT_USER15 162
547 * For future use with 802.11 captures - defined by AbsoluteValue
548 * Systems to store a number of bits of link-layer information
549 * including radio information:
551 * http://www.shaftnet.org/~pizza/software/capturefrm.txt
553 * but it might be used by some non-AVS drivers now or in the
556 #define DLT_IEEE802_11_RADIO_AVS 163 /* 802.11 plus AVS radio header */
559 * Juniper-private data link type, as per request from
560 * Hannes Gredler <hannes@juniper.net>. The DLT_s are used
561 * for passing on chassis-internal metainformation such as
562 * QOS profiles, etc..
564 #define DLT_JUNIPER_MONITOR 164
567 * Reserved for BACnet MS/TP.
569 #define DLT_BACNET_MS_TP 165
572 * Another PPP variant as per request from Karsten Keil <kkeil@suse.de>.
574 * This is used in some OSes to allow a kernel socket filter to distinguish
575 * between incoming and outgoing packets, on a socket intended to
576 * supply pppd with outgoing packets so it can do dial-on-demand and
577 * hangup-on-lack-of-demand; incoming packets are filtered out so they
578 * don't cause pppd to hold the connection up (you don't want random
579 * input packets such as port scans, packets from old lost connections,
580 * etc. to force the connection to stay up).
582 * The first byte of the PPP header (0xff03) is modified to accomodate
583 * the direction - 0x00 = IN, 0x01 = OUT.
585 #define DLT_PPP_PPPD 166
588 * Names for backwards compatibility with older versions of some PPP
589 * software; new software should use DLT_PPP_PPPD.
591 #define DLT_PPP_WITH_DIRECTION DLT_PPP_PPPD
592 #define DLT_LINUX_PPP_WITHDIRECTION DLT_PPP_PPPD
595 * Juniper-private data link type, as per request from
596 * Hannes Gredler <hannes@juniper.net>. The DLT_s are used
597 * for passing on chassis-internal metainformation such as
598 * QOS profiles, cookies, etc..
600 #define DLT_JUNIPER_PPPOE 167
601 #define DLT_JUNIPER_PPPOE_ATM 168
603 #define DLT_GPRS_LLC 169 /* GPRS LLC */
604 #define DLT_GPF_T 170 /* GPF-T (ITU-T G.7041/Y.1303) */
605 #define DLT_GPF_F 171 /* GPF-F (ITU-T G.7041/Y.1303) */
608 * Requested by Oolan Zimmer <oz@gcom.com> for use in Gcom's T1/E1 line
609 * monitoring equipment.
611 #define DLT_GCOM_T1E1 172
612 #define DLT_GCOM_SERIAL 173
615 * Juniper-private data link type, as per request from
616 * Hannes Gredler <hannes@juniper.net>. The DLT_ is used
617 * for internal communication to Physical Interface Cards (PIC)
619 #define DLT_JUNIPER_PIC_PEER 174
622 * Link types requested by Gregor Maier <gregor@endace.com> of Endace
623 * Measurement Systems. They add an ERF header (see
624 * http://www.endace.com/support/EndaceRecordFormat.pdf) in front of
625 * the link-layer header.
627 #define DLT_ERF_ETH 175 /* Ethernet */
628 #define DLT_ERF_POS 176 /* Packet-over-SONET */
631 * Requested by Daniele Orlandi <daniele@orlandi.com> for raw LAPD
632 * for vISDN (http://www.orlandi.com/visdn/). Its link-layer header
633 * includes additional information before the LAPD header, so it's
634 * not necessarily a generic LAPD header.
636 #define DLT_LINUX_LAPD 177
639 * Juniper-private data link type, as per request from
640 * Hannes Gredler <hannes@juniper.net>.
641 * The DLT_ are used for prepending meta-information
642 * like interface index, interface name
643 * before standard Ethernet, PPP, Frelay & C-HDLC Frames
645 #define DLT_JUNIPER_ETHER 178
646 #define DLT_JUNIPER_PPP 179
647 #define DLT_JUNIPER_FRELAY 180
648 #define DLT_JUNIPER_CHDLC 181
651 * Multi Link Frame Relay (FRF.16)
656 * Juniper-private data link type, as per request from
657 * Hannes Gredler <hannes@juniper.net>.
658 * The DLT_ is used for internal communication with a
659 * voice Adapter Card (PIC)
661 #define DLT_JUNIPER_VP 183
665 * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>.
666 * Every frame contains a 32bit A429 label.
667 * More documentation on Arinc 429 can be found at
668 * http://www.condoreng.com/support/downloads/tutorials/ARINCTutorial.pdf
673 * Arinc 653 Interpartition Communication messages.
674 * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>.
675 * Please refer to the A653-1 standard for more information.
677 #define DLT_A653_ICM 185
680 * USB packets, beginning with a USB setup header; requested by
681 * Paolo Abeni <paolo.abeni@email.it>.
686 * Bluetooth HCI UART transport layer (part H:4); requested by
689 #define DLT_BLUETOOTH_HCI_H4 187
692 * IEEE 802.16 MAC Common Part Sublayer; requested by Maria Cruz
693 * <cruz_petagay@bah.com>.
695 #define DLT_IEEE802_16_MAC_CPS 188
698 * USB packets, beginning with a Linux USB header; requested by
699 * Paolo Abeni <paolo.abeni@email.it>.
701 #define DLT_USB_LINUX 189
704 * Controller Area Network (CAN) v. 2.0B packets.
705 * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>.
706 * Used to dump CAN packets coming from a CAN Vector board.
707 * More documentation on the CAN v2.0B frames can be found at
708 * http://www.can-cia.org/downloads/?269
710 #define DLT_CAN20B 190
713 * IEEE 802.15.4, with address fields padded, as is done by Linux
714 * drivers; requested by Juergen Schimmer.
716 #define DLT_IEEE802_15_4_LINUX 191
719 * Per Packet Information encapsulated packets.
720 * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>.
725 * Header for 802.16 MAC Common Part Sublayer plus a radiotap radio header;
726 * requested by Charles Clancy.
728 #define DLT_IEEE802_16_MAC_CPS_RADIO 193
731 * Juniper-private data link type, as per request from
732 * Hannes Gredler <hannes@juniper.net>.
733 * The DLT_ is used for internal communication with a
734 * integrated service module (ISM).
736 #define DLT_JUNIPER_ISM 194
739 * IEEE 802.15.4, exactly as it appears in the spec (no padding, no
740 * nothing); requested by Mikko Saarnivala <mikko.saarnivala@sensinode.com>.
742 #define DLT_IEEE802_15_4 195
745 * Various link-layer types, with a pseudo-header, for SITA
746 * (http://www.sita.aero/); requested by Fulko Hew (fulko.hew@gmail.com).
751 * Various link-layer types, with a pseudo-header, for Endace DAG cards;
752 * encapsulates Endace ERF records. Requested by Stephen Donnelly
753 * <stephen@endace.com>.
758 * Special header prepended to Ethernet packets when capturing from a
759 * u10 Networks board. Requested by Phil Mulholland
760 * <phil@u10networks.com>.
762 #define DLT_RAIF1 198
765 * IPMB packet for IPMI, beginning with the I2C slave address, followed
766 * by the netFn and LUN, etc.. Requested by Chanthy Toeung
767 * <chanthy.toeung@ca.kontron.com>.
772 * Juniper-private data link type, as per request from
773 * Hannes Gredler <hannes@juniper.net>.
774 * The DLT_ is used for capturing data on a secure tunnel interface.
776 #define DLT_JUNIPER_ST 200
779 * Bluetooth HCI UART transport layer (part H:4), with pseudo-header
780 * that includes direction information; requested by Paolo Abeni.
782 #define DLT_BLUETOOTH_HCI_H4_WITH_PHDR 201
785 * AX.25 packet with a 1-byte KISS header; see
787 * http://www.ax25.net/kiss.htm
789 * as per Richard Stearn <richard@rns-stearn.demon.co.uk>.
791 #define DLT_AX25_KISS 202
794 * LAPD packets from an ISDN channel, starting with the address field,
795 * with no pseudo-header.
796 * Requested by Varuna De Silva <varunax@gmail.com>.
801 * Variants of various link-layer headers, with a one-byte direction
802 * pseudo-header prepended - zero means "received by this host",
803 * non-zero (any non-zero value) means "sent by this host" - as per
804 * Will Barker <w.barker@zen.co.uk>.
806 #define DLT_PPP_WITH_DIR 204 /* PPP - don't confuse with DLT_PPP_WITH_DIRECTION */
807 #define DLT_C_HDLC_WITH_DIR 205 /* Cisco HDLC */
808 #define DLT_FRELAY_WITH_DIR 206 /* Frame Relay */
809 #define DLT_LAPB_WITH_DIR 207 /* LAPB */
812 * 208 is reserved for an as-yet-unspecified proprietary link-layer
813 * type, as requested by Will Barker.
817 * IPMB with a Linux-specific pseudo-header; as requested by Alexey Neyman
818 * <avn@pigeonpoint.com>.
820 #define DLT_IPMB_LINUX 209
823 * FlexRay automotive bus - http://www.flexray.com/ - as requested
824 * by Hannes Kaelber <hannes.kaelber@x2e.de>.
826 #define DLT_FLEXRAY 210
829 * Media Oriented Systems Transport (MOST) bus for multimedia
830 * transport - http://www.mostcooperation.com/ - as requested
831 * by Hannes Kaelber <hannes.kaelber@x2e.de>.
836 * Local Interconnect Network (LIN) bus for vehicle networks -
837 * http://www.lin-subbus.org/ - as requested by Hannes Kaelber
838 * <hannes.kaelber@x2e.de>.
843 * X2E-private data link type used for serial line capture,
844 * as requested by Hannes Kaelber <hannes.kaelber@x2e.de>.
846 #define DLT_X2E_SERIAL 213
849 * X2E-private data link type used for the Xoraya data logger
850 * family, as requested by Hannes Kaelber <hannes.kaelber@x2e.de>.
852 #define DLT_X2E_XORAYA 214
855 * IEEE 802.15.4, exactly as it appears in the spec (no padding, no
856 * nothing), but with the PHY-level data for non-ASK PHYs (4 octets
857 * of 0 as preamble, one octet of SFD, one octet of frame length+
858 * reserved bit, and then the MAC-layer data, starting with the
859 * frame control field).
861 * Requested by Max Filippov <jcmvbkbc@gmail.com>.
863 #define DLT_IEEE802_15_4_NONASK_PHY 215
866 * David Gibson <david@gibson.dropbear.id.au> requested this for
867 * captures from the Linux kernel /dev/input/eventN devices. This
868 * is used to communicate keystrokes and mouse movements from the
869 * Linux kernel to display systems, such as Xorg.
871 #define DLT_LINUX_EVDEV 216
874 * GSM Um and Abis interfaces, preceded by a "gsmtap" header.
876 * Requested by Harald Welte <laforge@gnumonks.org>.
878 #define DLT_GSMTAP_UM 217
879 #define DLT_GSMTAP_ABIS 218
882 * MPLS, with an MPLS label as the link-layer header.
883 * Requested by Michele Marchetto <michele@openbsd.org> on behalf
889 * USB packets, beginning with a Linux USB header, with the USB header
890 * padded to 64 bytes; required for memory-mapped access.
892 #define DLT_USB_LINUX_MMAPPED 220
895 * DECT packets, with a pseudo-header; requested by
896 * Matthias Wenzel <tcpdump@mazzoo.de>.
900 * From: "Lidwa, Eric (GSFC-582.0)[SGT INC]" <eric.lidwa-1@nasa.gov>
901 * Date: Mon, 11 May 2009 11:18:30 -0500
903 * DLT_AOS. We need it for AOS Space Data Link Protocol.
904 * I have already written dissectors for but need an OK from
905 * legal before I can submit a patch.
911 * Wireless HART (Highway Addressable Remote Transducer)
912 * From the HART Communication Foundation
915 * Requested by Sam Roberts <vieuxtech@gmail.com>.
917 #define DLT_WIHART 223
920 * Fibre Channel FC-2 frames, beginning with a Frame_Header.
921 * Requested by Kahou Lei <kahou82@gmail.com>.
926 * Fibre Channel FC-2 frames, beginning with an encoding of the
927 * SOF, and ending with an encoding of the EOF.
929 * The encodings represent the frame delimiters as 4-byte sequences
930 * representing the corresponding ordered sets, with K28.5
931 * represented as 0xBC, and the D symbols as the corresponding
932 * byte values; for example, SOFi2, which is K28.5 - D21.5 - D1.2 - D21.2,
933 * is represented as 0xBC 0xB5 0x55 0x55.
935 * Requested by Kahou Lei <kahou82@gmail.com>.
937 #define DLT_FC_2_WITH_FRAME_DELIMS 225
939 * Solaris ipnet pseudo-header; requested by Darren Reed <Darren.Reed@Sun.COM>.
941 * The pseudo-header starts with a one-byte version number; for version 2,
942 * the pseudo-header is:
944 * struct dl_ipnetinfo {
945 * u_int8_t dli_version;
946 * u_int8_t dli_family;
947 * u_int16_t dli_htype;
948 * u_int32_t dli_pktlen;
949 * u_int32_t dli_ifindex;
950 * u_int32_t dli_grifindex;
951 * u_int32_t dli_zsrc;
952 * u_int32_t dli_zdst;
955 * dli_version is 2 for the current version of the pseudo-header.
957 * dli_family is a Solaris address family value, so it's 2 for IPv4
960 * dli_htype is a "hook type" - 0 for incoming packets, 1 for outgoing
961 * packets, and 2 for packets arriving from another zone on the same
964 * dli_pktlen is the length of the packet data following the pseudo-header
965 * (so the captured length minus dli_pktlen is the length of the
966 * pseudo-header, assuming the entire pseudo-header was captured).
968 * dli_ifindex is the interface index of the interface on which the
971 * dli_grifindex is the group interface index number (for IPMP interfaces).
973 * dli_zsrc is the zone identifier for the source of the packet.
975 * dli_zdst is the zone identifier for the destination of the packet.
977 * A zone number of 0 is the global zone; a zone number of 0xffffffff
978 * means that the packet arrived from another host on the network, not
979 * from another zone on the same machine.
981 * An IPv4 or IPv6 datagram follows the pseudo-header; dli_family indicates
982 * which of those it is.
984 #define DLT_IPNET 226
987 * CAN (Controller Area Network) frames, with a pseudo-header as supplied
988 * by Linux SocketCAN. See Documentation/networking/can.txt in the Linux
991 * Requested by Felix Obenhuber <felix@obenhuber.de>.
993 #define DLT_CAN_SOCKETCAN 227
996 * Raw IPv4/IPv6; different from DLT_RAW in that the DLT_ value specifies
997 * whether it's v4 or v6. Requested by Darren Reed <Darren.Reed@Sun.COM>.
1000 #define DLT_IPV6 229
1003 * IEEE 802.15.4, exactly as it appears in the spec (no padding, no
1004 * nothing), and with no FCS at the end of the frame; requested by
1005 * Jon Smirl <jonsmirl@gmail.com>.
1007 #define DLT_IEEE802_15_4_NOFCS 230
1012 * http://www.freedesktop.org/wiki/Software/dbus
1016 * http://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-messages
1018 * starting with the endianness flag, followed by the message type, etc.,
1019 * but without the authentication handshake before the message sequence:
1021 * http://dbus.freedesktop.org/doc/dbus-specification.html#auth-protocol
1023 * Requested by Martin Vidner <martin@vidner.net>.
1025 #define DLT_DBUS 231
1028 * Juniper-private data link type, as per request from
1029 * Hannes Gredler <hannes@juniper.net>.
1031 #define DLT_JUNIPER_VS 232
1032 #define DLT_JUNIPER_SRX_E2E 233
1033 #define DLT_JUNIPER_FIBRECHANNEL 234
1036 * DVB-CI (DVB Common Interface for communication between a PC Card
1037 * module and a DVB receiver). See
1039 * http://www.kaiser.cx/pcap-dvbci.html
1041 * for the specification.
1043 * Requested by Martin Kaiser <martin@kaiser.cx>.
1045 #define DLT_DVB_CI 235
1048 * Variant of 3GPP TS 27.010 multiplexing protocol (similar to, but
1049 * *not* the same as, 27.010). Requested by Hans-Christoph Schemmel
1050 * <hans-christoph.schemmel@cinterion.com>.
1052 #define DLT_MUX27010 236
1055 * STANAG 5066 D_PDUs. Requested by M. Baris Demiray
1056 * <barisdemiray@gmail.com>.
1058 #define DLT_STANAG_5066_D_PDU 237
1061 * Juniper-private data link type, as per request from
1062 * Hannes Gredler <hannes@juniper.net>.
1064 #define DLT_JUNIPER_ATM_CEMIC 238
1067 * NetFilter LOG messages
1068 * (payload of netlink NFNL_SUBSYS_ULOG/NFULNL_MSG_PACKET packets)
1070 * Requested by Jakub Zawadzki <darkjames-ws@darkjames.pl>
1072 #define DLT_NFLOG 239
1075 * Hilscher Gesellschaft fuer Systemautomation mbH link-layer type
1076 * for Ethernet packets with a 4-byte pseudo-header and always
1077 * with the payload including the FCS, as supplied by their
1078 * netANALYZER hardware and software.
1080 * Requested by Holger P. Frommer <HPfrommer@hilscher.com>
1082 #define DLT_NETANALYZER 240
1085 * Hilscher Gesellschaft fuer Systemautomation mbH link-layer type
1086 * for Ethernet packets with a 4-byte pseudo-header and FCS and
1087 * with the Ethernet header preceded by 7 bytes of preamble and
1088 * 1 byte of SFD, as supplied by their netANALYZER hardware and
1091 * Requested by Holger P. Frommer <HPfrommer@hilscher.com>
1093 #define DLT_NETANALYZER_TRANSPARENT 241
1096 * IP-over-Infiniband, as specified by RFC 4391.
1098 * Requested by Petr Sumbera <petr.sumbera@oracle.com>.
1100 #define DLT_IPOIB 242
1103 * MPEG-2 transport stream (ISO 13818-1/ITU-T H.222.0).
1105 * Requested by Guy Martin <gmsoft@tuxicoman.be>.
1107 #define DLT_MPEG_2_TS 243
1110 * ng4T GmbH's UMTS Iub/Iur-over-ATM and Iub/Iur-over-IP format as
1111 * used by their ng40 protocol tester.
1113 * Requested by Jens Grimmer <jens.grimmer@ng4t.com>.
1115 #define DLT_NG40 244
1118 * Pseudo-header giving adapter number and flags, followed by an NFC
1119 * (Near-Field Communications) Logical Link Control Protocol (LLCP) PDU,
1120 * as specified by NFC Forum Logical Link Control Protocol Technical
1121 * Specification LLCP 1.1.
1123 * Requested by Mike Wakerly <mikey@google.com>.
1125 #define DLT_NFC_LLCP 245
1128 * 245 is used as LINKTYPE_PFSYNC; do not use it for any other purpose.
1130 * DLT_PFSYNC has different values on different platforms, and all of
1131 * them collide with something used elsewhere. On platforms that
1132 * don't already define it, define it as 245.
1134 #if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__) && !defined(__DragonFly__) && !defined(__APPLE__)
1135 #define DLT_PFSYNC 246
1138 #define DLT_MATCHING_MAX 246 /* highest value in the "matching" range */
1141 * DLT and savefile link type values are split into a class and
1142 * a member of that class. A class value of 0 indicates a regular
1143 * DLT_/LINKTYPE_ value.
1145 #define DLT_CLASS(x) ((x) & 0x03ff0000)
1148 * The instruction encodings.
1150 /* instruction classes */
1151 #define BPF_CLASS(code) ((code) & 0x07)
1153 #define BPF_LDX 0x01
1155 #define BPF_STX 0x03
1156 #define BPF_ALU 0x04
1157 #define BPF_JMP 0x05
1158 #define BPF_RET 0x06
1159 #define BPF_MISC 0x07
1162 #define BPF_SIZE(code) ((code) & 0x18)
1166 #define BPF_MODE(code) ((code) & 0xe0)
1167 #define BPF_IMM 0x00
1168 #define BPF_ABS 0x20
1169 #define BPF_IND 0x40
1170 #define BPF_MEM 0x60
1171 #define BPF_LEN 0x80
1172 #define BPF_MSH 0xa0
1174 /* alu/jmp fields */
1175 #define BPF_OP(code) ((code) & 0xf0)
1176 #define BPF_ADD 0x00
1177 #define BPF_SUB 0x10
1178 #define BPF_MUL 0x20
1179 #define BPF_DIV 0x30
1181 #define BPF_AND 0x50
1182 #define BPF_LSH 0x60
1183 #define BPF_RSH 0x70
1184 #define BPF_NEG 0x80
1186 #define BPF_JEQ 0x10
1187 #define BPF_JGT 0x20
1188 #define BPF_JGE 0x30
1189 #define BPF_JSET 0x40
1190 #define BPF_SRC(code) ((code) & 0x08)
1194 /* ret - BPF_K and BPF_X also apply */
1195 #define BPF_RVAL(code) ((code) & 0x18)
1199 #define BPF_MISCOP(code) ((code) & 0xf8)
1200 #define BPF_TAX 0x00
1201 #define BPF_TXA 0x80
1204 * The instruction data structure.
1214 * Macros for insn array initializers.
1216 #define BPF_STMT(code, k) { (u_short)(code), 0, 0, k }
1217 #define BPF_JUMP(code, k, jt, jf) { (u_short)(code), jt, jf, k }
1220 * Structure to retrieve available DLTs for the interface.
1222 struct bpf_dltlist {
1223 u_int bfl_len; /* number of bfd_list array */
1224 u_int *bfl_list; /* array of DLTs */
1228 #ifdef MALLOC_DECLARE
1229 MALLOC_DECLARE(M_BPF);
1232 SYSCTL_DECL(_net_bpf);
1236 * Rotate the packet buffers in descriptor d. Move the store buffer into the
1237 * hold slot, and the free buffer ino the store slot. Zero the length of the
1238 * new store buffer. Descriptor lock should be held. Hold buffer must
1239 * not be marked "in use".
1241 #define ROTATE_BUFFERS(d) do { \
1242 (d)->bd_hbuf = (d)->bd_sbuf; \
1243 (d)->bd_hlen = (d)->bd_slen; \
1244 (d)->bd_sbuf = (d)->bd_fbuf; \
1246 (d)->bd_fbuf = NULL; \
1251 * Descriptor associated with each attached hardware interface.
1252 * FIXME: this structure is exposed to external callers to speed up
1253 * bpf_peers_present() call. However we cover all fields not needed by
1254 * this function via BPF_INTERNAL define
1257 LIST_ENTRY(bpf_if) bif_next; /* list of all interfaces */
1258 LIST_HEAD(, bpf_d) bif_dlist; /* descriptor list */
1260 u_int bif_dlt; /* link layer type */
1261 u_int bif_hdrlen; /* length of link header */
1262 struct ifnet *bif_ifp; /* corresponding interface */
1263 struct rwlock bif_lock; /* interface lock */
1264 LIST_HEAD(, bpf_d) bif_wlist; /* writer-only list */
1265 int flags; /* Interface flags */
1269 void bpf_bufheld(struct bpf_d *d);
1270 int bpf_validate(const struct bpf_insn *, int);
1271 void bpf_tap(struct bpf_if *, u_char *, u_int);
1272 void bpf_mtap(struct bpf_if *, struct mbuf *);
1273 void bpf_mtap2(struct bpf_if *, void *, u_int, struct mbuf *);
1274 void bpfattach(struct ifnet *, u_int, u_int);
1275 void bpfattach2(struct ifnet *, u_int, u_int, struct bpf_if **);
1276 void bpfdetach(struct ifnet *);
1278 void bpfilterattach(int);
1279 u_int bpf_filter(const struct bpf_insn *, u_char *, u_int, u_int);
1282 bpf_peers_present(struct bpf_if *bpf)
1285 if (!LIST_EMPTY(&bpf->bif_dlist))
1290 #define BPF_TAP(_ifp,_pkt,_pktlen) do { \
1291 if (bpf_peers_present((_ifp)->if_bpf)) \
1292 bpf_tap((_ifp)->if_bpf, (_pkt), (_pktlen)); \
1294 #define BPF_MTAP(_ifp,_m) do { \
1295 if (bpf_peers_present((_ifp)->if_bpf)) { \
1296 M_ASSERTVALID(_m); \
1297 bpf_mtap((_ifp)->if_bpf, (_m)); \
1300 #define BPF_MTAP2(_ifp,_data,_dlen,_m) do { \
1301 if (bpf_peers_present((_ifp)->if_bpf)) { \
1302 M_ASSERTVALID(_m); \
1303 bpf_mtap2((_ifp)->if_bpf,(_data),(_dlen),(_m)); \
1309 * Number of scratch memory words (for BPF_LD|BPF_MEM and BPF_ST).
1311 #define BPF_MEMWORDS 16
1313 #endif /* _NET_BPF_H_ */