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/*-
 * Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from the Stanford/CMU enet packet filter,
 * (net/enet.c) distributed as part of 4.3BSD, and code contributed
 * to Berkeley by Steven McCanne and Van Jacobson both of Lawrence 
 * Berkeley Laboratory.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      @(#)bpf.h       7.1 (Berkeley) 5/7/91
 *
 * @(#) $Header: /tcpdump/master/libpcap/pcap/bpf.h,v 1.19.2.8 2008-09-22 20:16:01 guy Exp $ (LBL)
 */

/*
 * This is libpcap's cut-down version of bpf.h; it includes only
 * the stuff needed for the code generator and the userland BPF
 * interpreter, and the libpcap APIs for setting filters, etc..
 *
 * &quot;pcap-bpf.c&quot; will include the native OS version, as it deals with
 * the OS's BPF implementation.
 *
 * XXX - should this all just be moved to &quot;pcap.h&quot;?
 */

#ifndef BPF_MAJOR_VERSION

#ifdef __cplusplus
extern &quot;C&quot; {
#endif

/* BSD style release date */
#define BPF_RELEASE 199606

#ifdef MSDOS /* must be 32-bit */
typedef long          bpf_int32;
typedef unsigned long bpf_u_int32;
#else
typedef	int bpf_int32;
typedef	u_int bpf_u_int32;
#endif

/*
 * Alignment macros.  BPF_WORDALIGN rounds up to the next 
 * even multiple of BPF_ALIGNMENT. 
 */
#ifndef __NetBSD__
#define BPF_ALIGNMENT sizeof(bpf_int32)
#else
#define BPF_ALIGNMENT sizeof(long)
#endif
#define BPF_WORDALIGN(x) (((x)+(BPF_ALIGNMENT-1))&amp;~(BPF_ALIGNMENT-1))

#define BPF_MAXBUFSIZE 0x8000
#define BPF_MINBUFSIZE 32

/*
 * Structure for &quot;pcap_compile()&quot;, &quot;pcap_setfilter()&quot;, etc..
 */
struct bpf_program {
	u_int bf_len;
	struct bpf_insn *bf_insns;
};
 
/*
 * Struct return by BIOCVERSION.  This represents the version number of 
 * the filter language described by the instruction encodings below.
 * bpf understands a program iff kernel_major == filter_major &amp;&amp;
 * kernel_minor &gt;= filter_minor, that is, if the value returned by the
 * running kernel has the same major number and a minor number equal
 * equal to or less than the filter being downloaded.  Otherwise, the
 * results are undefined, meaning an error may be returned or packets
 * may be accepted haphazardly.
 * It has nothing to do with the source code version.
 */
struct bpf_version {
	u_short bv_major;
	u_short bv_minor;
};
/* Current version number of filter architecture. */
#define BPF_MAJOR_VERSION 1
#define BPF_MINOR_VERSION 1

/*
 * Data-link level type codes.
 *
 * Do *NOT* add new values to this list without asking
 * &quot;tcpdump-workers@lists.tcpdump.org&quot; for a value.  Otherwise, you run
 * the risk of using a value that's already being used for some other
 * purpose, and of having tools that read libpcap-format captures not
 * being able to handle captures with your new DLT_ value, with no hope
 * that they will ever be changed to do so (as that would destroy their
 * ability to read captures using that value for that other purpose).
 */

/*
 * These are the types that are the same on all platforms, and that
 * have been defined by &lt;net/bpf.h&gt; for ages.
 */
#define DLT_NULL	0	/* BSD loopback encapsulation */
#define DLT_EN10MB	1	/* Ethernet (10Mb) */
#define DLT_EN3MB	2	/* Experimental Ethernet (3Mb) */
#define DLT_AX25	3	/* Amateur Radio AX.25 */
#define DLT_PRONET	4	/* Proteon ProNET Token Ring */
#define DLT_CHAOS	5	/* Chaos */
#define DLT_IEEE802	6	/* 802.5 Token Ring */
#define DLT_ARCNET	7	/* ARCNET, with BSD-style header */
#define DLT_SLIP	8	/* Serial Line IP */
#define DLT_PPP		9	/* Point-to-point Protocol */
#define DLT_FDDI	10	/* FDDI */

/*
 * These are types that are different on some platforms, and that
 * have been defined by &lt;net/bpf.h&gt; for ages.  We use #ifdefs to
 * detect the BSDs that define them differently from the traditional
 * libpcap &lt;net/bpf.h&gt;
 *
 * XXX - DLT_ATM_RFC1483 is 13 in BSD/OS, and DLT_RAW is 14 in BSD/OS,
 * but I don't know what the right #define is for BSD/OS.
 */
#define DLT_ATM_RFC1483	11	/* LLC-encapsulated ATM */

#ifdef __OpenBSD__
#define DLT_RAW		14	/* raw IP */
#else
#define DLT_RAW		12	/* raw IP */
#endif

/*
 * Given that the only OS that currently generates BSD/OS SLIP or PPP
 * is, well, BSD/OS, arguably everybody should have chosen its values
 * for DLT_SLIP_BSDOS and DLT_PPP_BSDOS, which are 15 and 16, but they
 * didn't.  So it goes.
 */
#if defined(__NetBSD__) || defined(__FreeBSD__)
#ifndef DLT_SLIP_BSDOS
#define DLT_SLIP_BSDOS	13	/* BSD/OS Serial Line IP */
#define DLT_PPP_BSDOS	14	/* BSD/OS Point-to-point Protocol */
#endif
#else
#define DLT_SLIP_BSDOS	15	/* BSD/OS Serial Line IP */
#define DLT_PPP_BSDOS	16	/* BSD/OS Point-to-point Protocol */
#endif

/*
 * 17 is used for DLT_OLD_PFLOG in OpenBSD;
 *     OBSOLETE: DLT_PFLOG is 117 in OpenBSD now as well. See below.
 * 18 is used for DLT_PFSYNC in OpenBSD; don't use it for anything else.
 */

#define DLT_ATM_CLIP	19	/* Linux Classical-IP over ATM */

/*
 * Apparently Redback uses this for its SmartEdge 400/800.  I hope
 * nobody else decided to use it, too.
 */
#define DLT_REDBACK_SMARTEDGE	32

/*
 * These values are defined by NetBSD; other platforms should refrain from
 * using them for other purposes, so that NetBSD savefiles with link
 * types of 50 or 51 can be read as this type on all platforms.
 */
#define DLT_PPP_SERIAL	50	/* PPP over serial with HDLC encapsulation */
#define DLT_PPP_ETHER	51	/* PPP over Ethernet */

/*
 * The Axent Raptor firewall - now the Symantec Enterprise Firewall - uses
 * a link-layer type of 99 for the tcpdump it supplies.  The link-layer
 * header has 6 bytes of unknown data, something that appears to be an
 * Ethernet type, and 36 bytes that appear to be 0 in at least one capture
 * I've seen.
 */
#define DLT_SYMANTEC_FIREWALL	99

/*
 * Values between 100 and 103 are used in capture file headers as
 * link-layer types corresponding to DLT_ types that differ
 * between platforms; don't use those values for new DLT_ new types.
 */

/*
 * This value was defined by libpcap 0.5; platforms that have defined
 * it with a different value should define it here with that value -
 * a link type of 104 in a save file will be mapped to DLT_C_HDLC,
 * whatever value that happens to be, so programs will correctly
 * handle files with that link type regardless of the value of
 * DLT_C_HDLC.
 *
 * The name DLT_C_HDLC was used by BSD/OS; we use that name for source
 * compatibility with programs written for BSD/OS.
 *
 * libpcap 0.5 defined it as DLT_CHDLC; we define DLT_CHDLC as well,
 * for source compatibility with programs written for libpcap 0.5.
 */
#define DLT_C_HDLC	104	/* Cisco HDLC */
#define DLT_CHDLC	DLT_C_HDLC

#define DLT_IEEE802_11	105	/* IEEE 802.11 wireless */

/*
 * 106 is reserved for Linux Classical IP over ATM; it's like DLT_RAW,
 * except when it isn't.  (I.e., sometimes it's just raw IP, and
 * sometimes it isn't.)  We currently handle it as DLT_LINUX_SLL,
 * so that we don't have to worry about the link-layer header.)
 */

/*
 * Frame Relay; BSD/OS has a DLT_FR with a value of 11, but that collides
 * with other values.
 * DLT_FR and DLT_FRELAY packets start with the Q.922 Frame Relay header
 * (DLCI, etc.).
 */
#define DLT_FRELAY	107

/*
 * OpenBSD DLT_LOOP, for loopback devices; it's like DLT_NULL, except
 * that the AF_ type in the link-layer header is in network byte order.
 *
 * DLT_LOOP is 12 in OpenBSD, but that's DLT_RAW in other OSes, so
 * we don't use 12 for it in OSes other than OpenBSD.
 */
#ifdef __OpenBSD__
#define DLT_LOOP	12
#else
#define DLT_LOOP	108
#endif

/*
 * Encapsulated packets for IPsec; DLT_ENC is 13 in OpenBSD, but that's
 * DLT_SLIP_BSDOS in NetBSD, so we don't use 13 for it in OSes other
 * than OpenBSD.
 */
#ifdef __OpenBSD__
#define DLT_ENC		13
#else
#define DLT_ENC		109
#endif

/*
 * Values between 110 and 112 are reserved for use in capture file headers
 * as link-layer types corresponding to DLT_ types that might differ
 * between platforms; don't use those values for new DLT_ types
 * other than the corresponding DLT_ types.
 */

/*
 * This is for Linux cooked sockets.
 */
#define DLT_LINUX_SLL	113

/*
 * Apple LocalTalk hardware.
 */
#define DLT_LTALK	114

/*
 * Acorn Econet.
 */
#define DLT_ECONET	115

/*
 * Reserved for use with OpenBSD ipfilter.
 */
#define DLT_IPFILTER	116

/*
 * OpenBSD DLT_PFLOG; DLT_PFLOG is 17 in OpenBSD, but that's DLT_LANE8023
 * in SuSE 6.3, so we can't use 17 for it in capture-file headers.
 *
 * XXX: is there a conflict with DLT_PFSYNC 18 as well?
 */
#ifdef __OpenBSD__
#define DLT_OLD_PFLOG	17
#define DLT_PFSYNC	18
#endif
#define DLT_PFLOG	117

/*
 * Registered for Cisco-internal use.
 */
#define DLT_CISCO_IOS	118

/*
 * For 802.11 cards using the Prism II chips, with a link-layer
 * header including Prism monitor mode information plus an 802.11
 * header.
 */
#define DLT_PRISM_HEADER	119

/*
 * Reserved for Aironet 802.11 cards, with an Aironet link-layer header
 * (see Doug Ambrisko's FreeBSD patches).
 */
#define DLT_AIRONET_HEADER	120

/*
 * Reserved for Siemens HiPath HDLC.
 */
#define DLT_HHDLC		121

/*
 * This is for RFC 2625 IP-over-Fibre Channel.
 *
 * This is not for use with raw Fibre Channel, where the link-layer
 * header starts with a Fibre Channel frame header; it's for IP-over-FC,
 * where the link-layer header starts with an RFC 2625 Network_Header
 * field.
 */
#define DLT_IP_OVER_FC		122

/*
 * This is for Full Frontal ATM on Solaris with SunATM, with a
 * pseudo-header followed by an AALn PDU.
 *
 * There may be other forms of Full Frontal ATM on other OSes,
 * with different pseudo-headers.
 *
 * If ATM software returns a pseudo-header with VPI/VCI information
 * (and, ideally, packet type information, e.g. signalling, ILMI,
 * LANE, LLC-multiplexed traffic, etc.), it should not use
 * DLT_ATM_RFC1483, but should get a new DLT_ value, so tcpdump
 * and the like don't have to infer the presence or absence of a
 * pseudo-header and the form of the pseudo-header.
 */
#define DLT_SUNATM		123	/* Solaris+SunATM */

/* 
 * Reserved as per request from Kent Dahlgren &lt;kent@praesum.com&gt;
 * for private use.
 */
#define DLT_RIO                 124     /* RapidIO */
#define DLT_PCI_EXP             125     /* PCI Express */
#define DLT_AURORA              126     /* Xilinx Aurora link layer */

/*
 * Header for 802.11 plus a number of bits of link-layer information
 * including radio information, used by some recent BSD drivers as
 * well as the madwifi Atheros driver for Linux.
 */
#define DLT_IEEE802_11_RADIO	127	/* 802.11 plus radiotap radio header */

/*
 * Reserved for the TZSP encapsulation, as per request from
 * Chris Waters &lt;chris.waters@networkchemistry.com&gt;
 * TZSP is a generic encapsulation for any other link type,
 * which includes a means to include meta-information
 * with the packet, e.g. signal strength and channel
 * for 802.11 packets.
 */
#define DLT_TZSP                128     /* Tazmen Sniffer Protocol */

/*
 * BSD's ARCNET headers have the source host, destination host,
 * and type at the beginning of the packet; that's what's handed
 * up to userland via BPF.
 *
 * Linux's ARCNET headers, however, have a 2-byte offset field
 * between the host IDs and the type; that's what's handed up
 * to userland via PF_PACKET sockets.
 *
 * We therefore have to have separate DLT_ values for them.
 */
#define DLT_ARCNET_LINUX	129	/* ARCNET */

/*
 * Juniper-private data link types, as per request from
 * Hannes Gredler &lt;hannes@juniper.net&gt;.  The DLT_s are used
 * for passing on chassis-internal metainformation such as
 * QOS profiles, etc..
 */
#define DLT_JUNIPER_MLPPP       130
#define DLT_JUNIPER_MLFR        131
#define DLT_JUNIPER_ES          132
#define DLT_JUNIPER_GGSN        133
#define DLT_JUNIPER_MFR         134
#define DLT_JUNIPER_ATM2        135
#define DLT_JUNIPER_SERVICES    136
#define DLT_JUNIPER_ATM1        137

/*
 * Apple IP-over-IEEE 1394, as per a request from Dieter Siegmund
 * &lt;dieter@apple.com&gt;.  The header that's presented is an Ethernet-like
 * header:
 *
 *	#define FIREWIRE_EUI64_LEN	8
 *	struct firewire_header {
 *		u_char  firewire_dhost[FIREWIRE_EUI64_LEN];
 *		u_char  firewire_shost[FIREWIRE_EUI64_LEN];
 *		u_short firewire_type;
 *	};
 *
 * with &quot;firewire_type&quot; being an Ethernet type value, rather than,
 * for example, raw GASP frames being handed up.
 */
#define DLT_APPLE_IP_OVER_IEEE1394	138

/*
 * Various SS7 encapsulations, as per a request from Jeff Morriss
 * &lt;jeff.morriss[AT]ulticom.com&gt; and subsequent discussions.
 */
#define DLT_MTP2_WITH_PHDR	139	/* pseudo-header with various info, followed by MTP2 */
#define DLT_MTP2		140	/* MTP2, without pseudo-header */
#define DLT_MTP3		141	/* MTP3, without pseudo-header or MTP2 */
#define DLT_SCCP		142	/* SCCP, without pseudo-header or MTP2 or MTP3 */

/*
 * DOCSIS MAC frames.
 */
#define DLT_DOCSIS		143

/*
 * Linux-IrDA packets. Protocol defined at http://www.irda.org.
 * Those packets include IrLAP headers and above (IrLMP...), but
 * don't include Phy framing (SOF/EOF/CRC &amp; byte stuffing), because Phy
 * framing can be handled by the hardware and depend on the bitrate.
 * This is exactly the format you would get capturing on a Linux-IrDA
 * interface (irdaX), but not on a raw serial port.
 * Note the capture is done in &quot;Linux-cooked&quot; mode, so each packet include
 * a fake packet header (struct sll_header). This is because IrDA packet
 * decoding is dependant on the direction of the packet (incomming or
 * outgoing).
 * When/if other platform implement IrDA capture, we may revisit the
 * issue and define a real DLT_IRDA...
 * Jean II
 */
#define DLT_LINUX_IRDA		144

/*
 * Reserved for IBM SP switch and IBM Next Federation switch.
 */
#define DLT_IBM_SP		145
#define DLT_IBM_SN		146

/*
 * Reserved for private use.  If you have some link-layer header type
 * that you want to use within your organization, with the capture files
 * using that link-layer header type not ever be sent outside your
 * organization, you can use these values.
 *
 * No libpcap release will use these for any purpose, nor will any
 * tcpdump release use them, either.
 *
 * Do *NOT* use these in capture files that you expect anybody not using
 * your private versions of capture-file-reading tools to read; in
 * particular, do *NOT* use them in products, otherwise you may find that
 * people won't be able to use tcpdump, or snort, or Ethereal, or... to
 * read capture files from your firewall/intrusion detection/traffic
 * monitoring/etc. appliance, or whatever product uses that DLT_ value,
 * and you may also find that the developers of those applications will
 * not accept patches to let them read those files.
 *
 * Also, do not use them if somebody might send you a capture using them
 * for *their* private type and tools using them for *your* private type
 * would have to read them.
 *
 * Instead, ask &quot;tcpdump-workers@lists.tcpdump.org&quot; for a new DLT_ value,
 * as per the comment above, and use the type you're given.
 */
#define DLT_USER0		147
#define DLT_USER1		148
#define DLT_USER2		149
#define DLT_USER3		150
#define DLT_USER4		151
#define DLT_USER5		152
#define DLT_USER6		153
#define DLT_USER7		154
#define DLT_USER8		155
#define DLT_USER9		156
#define DLT_USER10		157
#define DLT_USER11		158
#define DLT_USER12		159
#define DLT_USER13		160
#define DLT_USER14		161
#define DLT_USER15		162

/*
 * For future use with 802.11 captures - defined by AbsoluteValue
 * Systems to store a number of bits of link-layer information
 * including radio information:
 *
 *	http://www.shaftnet.org/~pizza/software/capturefrm.txt
 *
 * but it might be used by some non-AVS drivers now or in the
 * future.
 */
#define DLT_IEEE802_11_RADIO_AVS 163	/* 802.11 plus AVS radio header */

/*
 * Juniper-private data link type, as per request from
 * Hannes Gredler &lt;hannes@juniper.net&gt;.  The DLT_s are used
 * for passing on chassis-internal metainformation such as
 * QOS profiles, etc..
 */
#define DLT_JUNIPER_MONITOR     164

/*
 * Reserved for BACnet MS/TP.
 */
#define DLT_BACNET_MS_TP	165

/*
 * Another PPP variant as per request from Karsten Keil &lt;kkeil@suse.de&gt;.
 *
 * This is used in some OSes to allow a kernel socket filter to distinguish
 * between incoming and outgoing packets, on a socket intended to
 * supply pppd with outgoing packets so it can do dial-on-demand and
 * hangup-on-lack-of-demand; incoming packets are filtered out so they
 * don't cause pppd to hold the connection up (you don't want random
 * input packets such as port scans, packets from old lost connections,
 * etc. to force the connection to stay up).
 *
 * The first byte of the PPP header (0xff03) is modified to accomodate
 * the direction - 0x00 = IN, 0x01 = OUT.
 */
#define DLT_PPP_PPPD		166

/*
 * Names for backwards compatibility with older versions of some PPP
 * software; new software should use DLT_PPP_PPPD.
 */
#define DLT_PPP_WITH_DIRECTION	DLT_PPP_PPPD
#define DLT_LINUX_PPP_WITHDIRECTION	DLT_PPP_PPPD

/*
 * Juniper-private data link type, as per request from
 * Hannes Gredler &lt;hannes@juniper.net&gt;.  The DLT_s are used
 * for passing on chassis-internal metainformation such as
 * QOS profiles, cookies, etc..
 */
#define DLT_JUNIPER_PPPOE       167
#define DLT_JUNIPER_PPPOE_ATM   168

#define DLT_GPRS_LLC		169	/* GPRS LLC */
#define DLT_GPF_T		170	/* GPF-T (ITU-T G.7041/Y.1303) */
#define DLT_GPF_F		171	/* GPF-F (ITU-T G.7041/Y.1303) */

/*
 * Requested by Oolan Zimmer &lt;oz@gcom.com&gt; for use in Gcom's T1/E1 line
 * monitoring equipment.
 */
#define DLT_GCOM_T1E1		172
#define DLT_GCOM_SERIAL		173

/*
 * Juniper-private data link type, as per request from
 * Hannes Gredler &lt;hannes@juniper.net&gt;.  The DLT_ is used
 * for internal communication to Physical Interface Cards (PIC)
 */
#define DLT_JUNIPER_PIC_PEER    174

/*
 * Link types requested by Gregor Maier &lt;gregor@endace.com&gt; of Endace
 * Measurement Systems.  They add an ERF header (see
 * http://www.endace.com/support/EndaceRecordFormat.pdf) in front of
 * the link-layer header.
 */
#define DLT_ERF_ETH		175	/* Ethernet */
#define DLT_ERF_POS		176	/* Packet-over-SONET */

/*
 * Requested by Daniele Orlandi &lt;daniele@orlandi.com&gt; for raw LAPD
 * for vISDN (http://www.orlandi.com/visdn/).  Its link-layer header
 * includes additional information before the LAPD header, so it's
 * not necessarily a generic LAPD header.
 */
#define DLT_LINUX_LAPD		177

/*
 * Juniper-private data link type, as per request from
 * Hannes Gredler &lt;hannes@juniper.net&gt;. 
 * The DLT_ are used for prepending meta-information
 * like interface index, interface name
 * before standard Ethernet, PPP, Frelay &amp; C-HDLC Frames
 */
#define DLT_JUNIPER_ETHER       178
#define DLT_JUNIPER_PPP         179
#define DLT_JUNIPER_FRELAY      180
#define DLT_JUNIPER_CHDLC       181

/*
 * Multi Link Frame Relay (FRF.16)
 */
#define DLT_MFR                 182

/*
 * Juniper-private data link type, as per request from
 * Hannes Gredler &lt;hannes@juniper.net&gt;. 
 * The DLT_ is used for internal communication with a
 * voice Adapter Card (PIC)
 */
#define DLT_JUNIPER_VP          183

/*
 * Arinc 429 frames.
 * DLT_ requested by Gianluca Varenni &lt;gianluca.varenni@cacetech.com&gt;.
 * Every frame contains a 32bit A429 label.
 * More documentation on Arinc 429 can be found at
 * http://www.condoreng.com/support/downloads/tutorials/ARINCTutorial.pdf
 */
#define DLT_A429                184

/*
 * Arinc 653 Interpartition Communication messages.
 * DLT_ requested by Gianluca Varenni &lt;gianluca.varenni@cacetech.com&gt;.
 * Please refer to the A653-1 standard for more information.
 */
#define DLT_A653_ICM            185

/*
 * USB packets, beginning with a USB setup header; requested by
 * Paolo Abeni &lt;paolo.abeni@email.it&gt;.
 */
#define DLT_USB			186

/*
 * Bluetooth HCI UART transport layer (part H:4); requested by
 * Paolo Abeni.
 */
#define DLT_BLUETOOTH_HCI_H4	187

/*
 * IEEE 802.16 MAC Common Part Sublayer; requested by Maria Cruz
 * &lt;cruz_petagay@bah.com&gt;.
 */
#define DLT_IEEE802_16_MAC_CPS	188

/*
 * USB packets, beginning with a Linux USB header; requested by
 * Paolo Abeni &lt;paolo.abeni@email.it&gt;.
 */
#define DLT_USB_LINUX		189

/*
 * Controller Area Network (CAN) v. 2.0B packets.
 * DLT_ requested by Gianluca Varenni &lt;gianluca.varenni@cacetech.com&gt;.
 * Used to dump CAN packets coming from a CAN Vector board.
 * More documentation on the CAN v2.0B frames can be found at
 * http://www.can-cia.org/downloads/?269
 */
#define DLT_CAN20B              190

/*
 * IEEE 802.15.4, with address fields padded, as is done by Linux
 * drivers; requested by Juergen Schimmer.
 */
#define DLT_IEEE802_15_4_LINUX	191

/*
 * Per Packet Information encapsulated packets.
 * DLT_ requested by Gianluca Varenni &lt;gianluca.varenni@cacetech.com&gt;.
 */
#define DLT_PPI			192

/*
 * Header for 802.16 MAC Common Part Sublayer plus a radiotap radio header;
 * requested by Charles Clancy.
 */
#define DLT_IEEE802_16_MAC_CPS_RADIO	193

/*
 * Juniper-private data link type, as per request from
 * Hannes Gredler &lt;hannes@juniper.net&gt;. 
 * The DLT_ is used for internal communication with a
 * integrated service module (ISM).
 */
#define DLT_JUNIPER_ISM         194

/*
 * IEEE 802.15.4, exactly as it appears in the spec (no padding, no
 * nothing); requested by Mikko Saarnivala &lt;mikko.saarnivala@sensinode.com&gt;.
 */
#define DLT_IEEE802_15_4	195

/*
 * Various link-layer types, with a pseudo-header, for SITA
 * (http://www.sita.aero/); requested by Fulko Hew (fulko.hew@gmail.com).
 */
#define DLT_SITA		196

/*
 * Various link-layer types, with a pseudo-header, for Endace DAG cards;
 * encapsulates Endace ERF records.  Requested by Stephen Donnelly
 * &lt;stephen@endace.com&gt;.
 */
#define DLT_ERF			197

/*
 * Special header prepended to Ethernet packets when capturing from a
 * u10 Networks board.  Requested by Phil Mulholland
 * &lt;phil@u10networks.com&gt;.
 */
#define DLT_RAIF1		198

/*
 * IPMB packet for IPMI, beginning with the I2C slave address, followed
 * by the netFn and LUN, etc..  Requested by Chanthy Toeung
 * &lt;chanthy.toeung@ca.kontron.com&gt;.
 */
#define DLT_IPMB		199

/*
 * Juniper-private data link type, as per request from
 * Hannes Gredler &lt;hannes@juniper.net&gt;. 
 * The DLT_ is used for capturing data on a secure tunnel interface.
 */
#define DLT_JUNIPER_ST          200

/*
 * Bluetooth HCI UART transport layer (part H:4), with pseudo-header
 * that includes direction information; requested by Paolo Abeni.
 */
#define DLT_BLUETOOTH_HCI_H4_WITH_PHDR	201

/*
 * AX.25 packet with a 1-byte KISS header; see
 *
 *	http://www.ax25.net/kiss.htm
 *
 * as per Richard Stearn &lt;richard@rns-stearn.demon.co.uk&gt;.
 */
#define DLT_AX25_KISS		202

/*
 * LAPD packets from an ISDN channel, starting with the address field,
 * with no pseudo-header.
 * Requested by Varuna De Silva &lt;varunax@gmail.com&gt;.
 */
#define DLT_LAPD		203

/*
 * Variants of various link-layer headers, with a one-byte direction
 * pseudo-header prepended - zero means &quot;received by this host&quot;,
 * non-zero (any non-zero value) means &quot;sent by this host&quot; - as per
 * Will Barker &lt;w.barker@zen.co.uk&gt;.
 */
#define DLT_PPP_WITH_DIR	204	/* PPP - don't confuse with DLT_PPP_WITH_DIRECTION */
#define DLT_C_HDLC_WITH_DIR	205	/* Cisco HDLC */
#define DLT_FRELAY_WITH_DIR	206	/* Frame Relay */
#define DLT_LAPB_WITH_DIR	207	/* LAPB */

/*
 * 208 is reserved for an as-yet-unspecified proprietary link-layer
 * type, as requested by Will Barker.
 */

/*
 * IPMB with a Linux-specific pseudo-header; as requested by Alexey Neyman
 * &lt;avn@pigeonpoint.com&gt;.
 */
#define DLT_IPMB_LINUX		209

/*
 * FlexRay automotive bus - http://www.flexray.com/ - as requested
 * by Hannes Kaelber &lt;hannes.kaelber@x2e.de&gt;.
 */
#define DLT_FLEXRAY		210

/*
 * Media Oriented Systems Transport (MOST) bus for multimedia
 * transport - http://www.mostcooperation.com/ - as requested
 * by Hannes Kaelber &lt;hannes.kaelber@x2e.de&gt;.
 */
#define DLT_MOST		211

/*
 * Local Interconnect Network (LIN) bus for vehicle networks -
 * http://www.lin-subbus.org/ - as requested by Hannes Kaelber
 * &lt;hannes.kaelber@x2e.de&gt;.
 */
#define DLT_LIN			212

/*
 * X2E-private data link type used for serial line capture,
 * as requested by Hannes Kaelber &lt;hannes.kaelber@x2e.de&gt;.
 */
#define DLT_X2E_SERIAL		213

/*
 * X2E-private data link type used for the Xoraya data logger
 * family, as requested by Hannes Kaelber &lt;hannes.kaelber@x2e.de&gt;.
 */
#define DLT_X2E_XORAYA		214

/*
 * IEEE 802.15.4, exactly as it appears in the spec (no padding, no
 * nothing), but with the PHY-level data for non-ASK PHYs (4 octets
 * of 0 as preamble, one octet of SFD, one octet of frame length+
 * reserved bit, and then the MAC-layer data, starting with the
 * frame control field).
 *
 * Requested by Max Filippov &lt;jcmvbkbc@gmail.com&gt;.
 */
#define DLT_IEEE802_15_4_NONASK_PHY	215

/*
 * DLT and savefile link type values are split into a class and
 * a member of that class.  A class value of 0 indicates a regular
 * DLT_/LINKTYPE_ value.
 */
#define DLT_CLASS(x)		((x) &amp; 0x03ff0000)

/*
 * NetBSD-specific generic &quot;raw&quot; link type.  The class value indicates
 * that this is the generic raw type, and the lower 16 bits are the
 * address family we're dealing with.  Those values are NetBSD-specific;
 * do not assume that they correspond to AF_ values for your operating
 * system.
 */
#define	DLT_CLASS_NETBSD_RAWAF	0x02240000
#define	DLT_NETBSD_RAWAF(af)	(DLT_CLASS_NETBSD_RAWAF | (af))
#define	DLT_NETBSD_RAWAF_AF(x)	((x) &amp; 0x0000ffff)
#define	DLT_IS_NETBSD_RAWAF(x)	(DLT_CLASS(x) == DLT_CLASS_NETBSD_RAWAF)

/*
 * The instruction encodings.
 */
/* instruction classes */
#define BPF_CLASS(code) ((code) &amp; 0x07)
#define		BPF_LD		0x00
#define		BPF_LDX		0x01
#define		BPF_ST		0x02
#define		BPF_STX		0x03
#define		BPF_ALU		0x04
#define		BPF_JMP		0x05
#define		BPF_RET		0x06
#define		BPF_MISC	0x07

/* ld/ldx fields */
#define BPF_SIZE(code)	((code) &amp; 0x18)
#define		BPF_W		0x00
#define		BPF_H		0x08
#define		BPF_B		0x10
#define BPF_MODE(code)	((code) &amp; 0xe0)
#define		BPF_IMM 	0x00
#define		BPF_ABS		0x20
#define		BPF_IND		0x40
#define		BPF_MEM		0x60
#define		BPF_LEN		0x80
#define		BPF_MSH		0xa0

/* alu/jmp fields */
#define BPF_OP(code)	((code) &amp; 0xf0)
#define		BPF_ADD		0x00
#define		BPF_SUB		0x10
#define		BPF_MUL		0x20
#define		BPF_DIV		0x30
#define		BPF_OR		0x40
#define		BPF_AND		0x50
#define		BPF_LSH		0x60
#define		BPF_RSH		0x70
#define		BPF_NEG		0x80
#define		BPF_JA		0x00
#define		BPF_JEQ		0x10
#define		BPF_JGT		0x20
#define		BPF_JGE		0x30
#define		BPF_JSET	0x40
#define BPF_SRC(code)	((code) &amp; 0x08)
#define		BPF_K		0x00
#define		BPF_X		0x08

/* ret - BPF_K and BPF_X also apply */
#define BPF_RVAL(code)	((code) &amp; 0x18)
#define		BPF_A		0x10

/* misc */
#define BPF_MISCOP(code) ((code) &amp; 0xf8)
#define		BPF_TAX		0x00
#define		BPF_TXA		0x80

/*
 * The instruction data structure.
 */
struct bpf_insn {
	u_short	code;
	u_char 	jt;
	u_char 	jf;
	bpf_u_int32 k;
};

/*
 * Macros for insn array initializers.
 */
#define BPF_STMT(code, k) { (u_short)(code), 0, 0, k }
#define BPF_JUMP(code, k, jt, jf) { (u_short)(code), jt, jf, k }

#if __STDC__ || defined(__cplusplus)
extern int bpf_validate(const struct bpf_insn *, int);
extern u_int bpf_filter(const struct bpf_insn *, const u_char *, u_int, u_int);
#else
extern int bpf_validate();
extern u_int bpf_filter();
#endif

/*
 * Number of scratch memory words (for BPF_LD|BPF_MEM and BPF_ST).
 */
#define BPF_MEMWORDS 16

#ifdef __cplusplus
}
#endif

#endif
</pre>
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