1/* 2 * Copyright (c) 2000-2013 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28/* 29 * Copyright (c) 1990, 1991, 1993 30 * The Regents of the University of California. All rights reserved. 31 * 32 * This code is derived from the Stanford/CMU enet packet filter, 33 * (net/enet.c) distributed as part of 4.3BSD, and code contributed 34 * to Berkeley by Steven McCanne and Van Jacobson both of Lawrence 35 * Berkeley Laboratory. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by the University of 48 * California, Berkeley and its contributors. 49 * 4. Neither the name of the University nor the names of its contributors 50 * may be used to endorse or promote products derived from this software 51 * without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 * 65 * @(#)bpf.h 8.1 (Berkeley) 6/10/93 66 * @(#)bpf.h 1.34 (LBL) 6/16/96 67 * 68 * $FreeBSD: src/sys/net/bpf.h,v 1.21.2.3 2001/08/01 00:23:13 fenner Exp $ 69 */ 70/* 71 * NOTICE: This file was modified by SPARTA, Inc. in 2006 to introduce 72 * support for mandatory and extensible security protections. This notice 73 * is included in support of clause 2.2 (b) of the Apple Public License, 74 * Version 2.0. 75 */ 76 77#ifndef _NET_BPF_H_ 78#define _NET_BPF_H_ 79#include <sys/param.h> 80#include <sys/appleapiopts.h> 81#include <sys/types.h> 82#include <sys/time.h> 83#include <sys/cdefs.h> 84#include <stdint.h> 85 86#ifdef KERNEL 87#include <sys/kernel_types.h> 88#endif 89 90/* BSD style release date */ 91#define BPF_RELEASE 199606 92 93typedef int32_t bpf_int32; 94typedef u_int32_t bpf_u_int32; 95 96/* 97 * Alignment macros. BPF_WORDALIGN rounds up to the next 98 * even multiple of BPF_ALIGNMENT. 99 */ 100#define BPF_ALIGNMENT sizeof(int32_t) 101#define BPF_WORDALIGN(x) (((x)+(BPF_ALIGNMENT-1))&~(BPF_ALIGNMENT-1)) 102 103#define BPF_MAXINSNS 512 104#define BPF_MAXBUFSIZE 0x80000 105#define BPF_MINBUFSIZE 32 106 107/* 108 * Structure for BIOCSETF. 109 */ 110struct bpf_program { 111 u_int bf_len; 112 struct bpf_insn *bf_insns; 113}; 114 115#ifdef KERNEL_PRIVATE 116/* LP64 version of bpf_program. all pointers 117 * grow when we're dealing with a 64-bit process. 118 * WARNING - keep in sync with bpf_program 119 */ 120struct bpf_program64 { 121 u_int bf_len; 122 user64_addr_t bf_insns __attribute__((aligned(8))); 123}; 124 125struct bpf_program32 { 126 u_int bf_len; 127 user32_addr_t bf_insns; 128}; 129#endif /* KERNEL_PRIVATE */ 130 131/* 132 * Struct returned by BIOCGSTATS. 133 */ 134struct bpf_stat { 135 u_int bs_recv; /* number of packets received */ 136 u_int bs_drop; /* number of packets dropped */ 137}; 138 139/* 140 * Struct return by BIOCVERSION. This represents the version number of 141 * the filter language described by the instruction encodings below. 142 * bpf understands a program iff kernel_major == filter_major && 143 * kernel_minor >= filter_minor, that is, if the value returned by the 144 * running kernel has the same major number and a minor number equal 145 * equal to or less than the filter being downloaded. Otherwise, the 146 * results are undefined, meaning an error may be returned or packets 147 * may be accepted haphazardly. 148 * It has nothing to do with the source code version. 149 */ 150struct bpf_version { 151 u_short bv_major; 152 u_short bv_minor; 153}; 154#if defined(__LP64__) 155#include <sys/_types/_timeval32.h> 156 157#define BPF_TIMEVAL timeval32 158#else 159#define BPF_TIMEVAL timeval 160#endif /* __LP64__ */ 161/* Current version number of filter architecture. */ 162#define BPF_MAJOR_VERSION 1 163#define BPF_MINOR_VERSION 1 164 165#define BIOCGBLEN _IOR('B',102, u_int) 166#define BIOCSBLEN _IOWR('B',102, u_int) 167#define BIOCSETF _IOW('B',103, struct bpf_program) 168#ifdef KERNEL_PRIVATE 169#define BIOCSETF64 _IOW('B',103, struct bpf_program64) 170#define BIOCSETF32 _IOW('B',103, struct bpf_program32) 171#endif /* KERNEL_PRIVATE */ 172#define BIOCFLUSH _IO('B',104) 173#define BIOCPROMISC _IO('B',105) 174#define BIOCGDLT _IOR('B',106, u_int) 175#define BIOCGETIF _IOR('B',107, struct ifreq) 176#define BIOCSETIF _IOW('B',108, struct ifreq) 177#define BIOCSRTIMEOUT _IOW('B',109, struct timeval) 178#ifdef KERNEL_PRIVATE 179#define BIOCSRTIMEOUT64 _IOW('B',109, struct user64_timeval) 180#define BIOCSRTIMEOUT32 _IOW('B',109, struct user32_timeval) 181#endif /* KERNEL_PRIVATE */ 182#define BIOCGRTIMEOUT _IOR('B',110, struct timeval) 183#ifdef KERNEL_PRIVATE 184#define BIOCGRTIMEOUT64 _IOR('B',110, struct user64_timeval) 185#define BIOCGRTIMEOUT32 _IOR('B',110, struct user32_timeval) 186#endif /* KERNEL_PRIVATE */ 187#define BIOCGSTATS _IOR('B',111, struct bpf_stat) 188#define BIOCIMMEDIATE _IOW('B',112, u_int) 189#define BIOCVERSION _IOR('B',113, struct bpf_version) 190#define BIOCGRSIG _IOR('B',114, u_int) 191#define BIOCSRSIG _IOW('B',115, u_int) 192#define BIOCGHDRCMPLT _IOR('B',116, u_int) 193#define BIOCSHDRCMPLT _IOW('B',117, u_int) 194#define BIOCGSEESENT _IOR('B',118, u_int) 195#define BIOCSSEESENT _IOW('B',119, u_int) 196#define BIOCSDLT _IOW('B',120, u_int) 197#define BIOCGDLTLIST _IOWR('B',121, struct bpf_dltlist) 198#ifdef PRIVATE 199#define BIOCGETTC _IOR('B', 122, int) 200#define BIOCSETTC _IOW('B', 123, int) 201#define BIOCSEXTHDR _IOW('B', 124, u_int) 202#define BIOCGIFATTACHCOUNT _IOWR('B', 125, struct ifreq) 203#endif /* PRIVATE */ 204#define BIOCSETFNR _IOW('B', 126, struct bpf_program) 205#ifdef KERNEL_PRIVATE 206#define BIOCSETFNR64 _IOW('B',126, struct bpf_program64) 207#define BIOCSETFNR32 _IOW('B',126, struct bpf_program32) 208#endif /* KERNEL_PRIVATE */ 209 210/* 211 * Structure prepended to each packet. 212 */ 213struct bpf_hdr { 214 struct BPF_TIMEVAL bh_tstamp; /* time stamp */ 215 bpf_u_int32 bh_caplen; /* length of captured portion */ 216 bpf_u_int32 bh_datalen; /* original length of packet */ 217 u_short bh_hdrlen; /* length of bpf header (this struct 218 plus alignment padding) */ 219}; 220#ifdef KERNEL 221/* 222 * Because the structure above is not a multiple of 4 bytes, some compilers 223 * will insist on inserting padding; hence, sizeof(struct bpf_hdr) won't work. 224 * Only the kernel needs to know about it; applications use bh_hdrlen. 225 */ 226#define SIZEOF_BPF_HDR (sizeof(struct bpf_hdr) <= 20 ? 18 : \ 227 sizeof(struct bpf_hdr)) 228#endif 229#ifdef PRIVATE 230/* 231 * This structure must be a multiple of 4 bytes. 232 * It includes padding and spare fields that we can use later if desired. 233 */ 234struct bpf_hdr_ext { 235 struct BPF_TIMEVAL bh_tstamp; /* time stamp */ 236 bpf_u_int32 bh_caplen; /* length of captured portion */ 237 bpf_u_int32 bh_datalen; /* original length of packet */ 238 u_short bh_hdrlen; /* length of bpf header */ 239 u_short bh_flags; 240#define BPF_HDR_EXT_FLAGS_DIR_IN 0x0000 241#define BPF_HDR_EXT_FLAGS_DIR_OUT 0x0001 242 pid_t bh_pid; /* process PID */ 243 char bh_comm[MAXCOMLEN+1]; /* process command */ 244 u_char _bh_pad2[2]; 245 u_char bh_proto; /* kernel reserved; 0 in userland */ 246 bpf_u_int32 bh_svc; /* service class */ 247 bpf_u_int32 bh_flowid; /* kernel reserved; 0 in userland */ 248}; 249 250#define BPF_CONTROL_NAME "com.apple.net.bpf" 251 252struct bpf_mtag { 253 char bt_comm[MAXCOMLEN]; 254 pid_t bt_pid; 255 bpf_u_int32 bt_svc; 256 unsigned char bt_direction; 257#define BPF_MTAG_DIR_IN 0 258#define BPF_MTAG_DIR_OUT 1 259}; 260#endif /* PRIVATE */ 261 262/* 263 * Data-link level type codes. 264 */ 265#define DLT_NULL 0 /* no link-layer encapsulation */ 266#define DLT_EN10MB 1 /* Ethernet (10Mb) */ 267#define DLT_EN3MB 2 /* Experimental Ethernet (3Mb) */ 268#define DLT_AX25 3 /* Amateur Radio AX.25 */ 269#define DLT_PRONET 4 /* Proteon ProNET Token Ring */ 270#define DLT_CHAOS 5 /* Chaos */ 271#define DLT_IEEE802 6 /* IEEE 802 Networks */ 272#define DLT_ARCNET 7 /* ARCNET */ 273#define DLT_SLIP 8 /* Serial Line IP */ 274#define DLT_PPP 9 /* Point-to-point Protocol */ 275#define DLT_FDDI 10 /* FDDI */ 276#define DLT_ATM_RFC1483 11 /* LLC/SNAP encapsulated atm */ 277#define DLT_RAW 12 /* raw IP */ 278 279/* 280 * These are values from BSD/OS's "bpf.h". 281 * These are not the same as the values from the traditional libpcap 282 * "bpf.h"; however, these values shouldn't be generated by any 283 * OS other than BSD/OS, so the correct values to use here are the 284 * BSD/OS values. 285 * 286 * Platforms that have already assigned these values to other 287 * DLT_ codes, however, should give these codes the values 288 * from that platform, so that programs that use these codes will 289 * continue to compile - even though they won't correctly read 290 * files of these types. 291 */ 292#define DLT_SLIP_BSDOS 15 /* BSD/OS Serial Line IP */ 293#define DLT_PPP_BSDOS 16 /* BSD/OS Point-to-point Protocol */ 294 295/* 296 * 17 was used for DLT_PFLOG in OpenBSD; it no longer is. 297 * 298 * It was DLT_LANE8023 in SuSE 6.3, so we defined LINKTYPE_PFLOG 299 * as 117 so that pflog captures would use a link-layer header type 300 * value that didn't collide with any other values. On all 301 * platforms other than OpenBSD, we defined DLT_PFLOG as 117, 302 * and we mapped between LINKTYPE_PFLOG and DLT_PFLOG. 303 * 304 * OpenBSD eventually switched to using 117 for DLT_PFLOG as well. 305 * 306 * Don't use 17 for anything else. 307 */ 308 309/* 310 * 18 is used for DLT_PFSYNC in OpenBSD, NetBSD, DragonFly BSD and 311 * Mac OS X; don't use it for anything else. (FreeBSD uses 121, 312 * which collides with DLT_HHDLC, even though it doesn't use 18 313 * for anything and doesn't appear to have ever used it for anything.) 314 * 315 * We define it as 18 on those platforms; it is, unfortunately, used 316 * for DLT_CIP in Suse 6.3, so we don't define it as DLT_PFSYNC 317 * in general. As the packet format for it, like that for 318 * DLT_PFLOG, is not only OS-dependent but OS-version-dependent, 319 * we don't support printing it in tcpdump except on OSes that 320 * have the relevant header files, so it's not that useful on 321 * other platforms. 322 */ 323#define DLT_PFSYNC 18 /* Packet filter state syncing */ 324 325#define DLT_ATM_CLIP 19 /* Linux Classical-IP over ATM */ 326 327/* 328 * These values are defined by NetBSD; other platforms should refrain from 329 * using them for other purposes, so that NetBSD savefiles with link 330 * types of 50 or 51 can be read as this type on all platforms. 331 */ 332#define DLT_PPP_SERIAL 50 /* PPP over serial with HDLC encapsulation */ 333#define DLT_PPP_ETHER 51 /* PPP over Ethernet */ 334 335/* 336 * The Axent Raptor firewall - now the Symantec Enterprise Firewall - uses 337 * a link-layer type of 99 for the tcpdump it supplies. The link-layer 338 * header has 6 bytes of unknown data, something that appears to be an 339 * Ethernet type, and 36 bytes that appear to be 0 in at least one capture 340 * I've seen. 341 */ 342#define DLT_SYMANTEC_FIREWALL 99 343 344/* 345 * Values between 100 and 103 are used in capture file headers as 346 * link-layer header type LINKTYPE_ values corresponding to DLT_ types 347 * that differ between platforms; don't use those values for new DLT_ 348 * new types. 349 */ 350 351/* 352 * Values starting with 104 are used for newly-assigned link-layer 353 * header type values; for those link-layer header types, the DLT_ 354 * value returned by pcap_datalink() and passed to pcap_open_dead(), 355 * and the LINKTYPE_ value that appears in capture files, are the 356 * same. 357 * 358 * DLT_MATCHING_MIN is the lowest such value; DLT_MATCHING_MAX is 359 * the highest such value. 360 */ 361#define DLT_MATCHING_MIN 104 362 363/* 364 * This value was defined by libpcap 0.5; platforms that have defined 365 * it with a different value should define it here with that value - 366 * a link type of 104 in a save file will be mapped to DLT_C_HDLC, 367 * whatever value that happens to be, so programs will correctly 368 * handle files with that link type regardless of the value of 369 * DLT_C_HDLC. 370 * 371 * The name DLT_C_HDLC was used by BSD/OS; we use that name for source 372 * compatibility with programs written for BSD/OS. 373 * 374 * libpcap 0.5 defined it as DLT_CHDLC; we define DLT_CHDLC as well, 375 * for source compatibility with programs written for libpcap 0.5. 376 */ 377#define DLT_C_HDLC 104 /* Cisco HDLC */ 378#define DLT_CHDLC DLT_C_HDLC 379 380#define DLT_IEEE802_11 105 /* IEEE 802.11 wireless */ 381 382/* 383 * Values between 106 and 107 are used in capture file headers as 384 * link-layer types corresponding to DLT_ types that might differ 385 * between platforms; don't use those values for new DLT_ new types. 386 */ 387 388/* 389 * Frame Relay; BSD/OS has a DLT_FR with a value of 11, but that collides 390 * with other values. 391 * DLT_FR and DLT_FRELAY packets start with the Q.922 Frame Relay header 392 * (DLCI, etc.). 393 */ 394#define DLT_FRELAY 107 395 396/* 397 * OpenBSD DLT_LOOP, for loopback devices; it's like DLT_NULL, except 398 * that the AF_ type in the link-layer header is in network byte order. 399 * 400 * OpenBSD defines it as 12, but that collides with DLT_RAW, so we 401 * define it as 108 here. If OpenBSD picks up this file, it should 402 * define DLT_LOOP as 12 in its version, as per the comment above - 403 * and should not use 108 for any purpose. 404 */ 405#define DLT_LOOP 108 406 407/* 408 * Values between 109 and 112 are used in capture file headers as 409 * link-layer types corresponding to DLT_ types that might differ 410 * between platforms; don't use those values for new DLT_ new types. 411 */ 412 413/* 414 * Encapsulated packets for IPsec; DLT_ENC is 13 in OpenBSD, but that's 415 * DLT_SLIP_BSDOS in NetBSD, so we don't use 13 for it in OSes other 416 * than OpenBSD. 417 */ 418#define DLT_ENC 109 419 420/* 421 * This is for Linux cooked sockets. 422 */ 423#define DLT_LINUX_SLL 113 424 425/* 426 * Apple LocalTalk hardware. 427 */ 428#define DLT_LTALK 114 429 430/* 431 * Acorn Econet. 432 */ 433#define DLT_ECONET 115 434 435/* 436 * Reserved for use with OpenBSD ipfilter. 437 */ 438#define DLT_IPFILTER 116 439 440/* 441 * For use in capture-file headers as a link-layer type corresponding 442 * to OpenBSD PF (Packet Filter) log. 443 */ 444#define DLT_PFLOG 117 445 446/* 447 * Registered for Cisco-internal use. 448 */ 449#define DLT_CISCO_IOS 118 450 451/* 452 * Reserved for 802.11 cards using the Prism II chips, with a link-layer 453 * header including Prism monitor mode information plus an 802.11 454 * header. 455 */ 456#define DLT_PRISM_HEADER 119 457 458/* 459 * Reserved for Aironet 802.11 cards, with an Aironet link-layer header 460 * (see Doug Ambrisko's FreeBSD patches). 461 */ 462#define DLT_AIRONET_HEADER 120 463 464/* 465 * Reserved for Siemens HiPath HDLC. XXX 466 */ 467#define DLT_HHDLC 121 468 469/* 470 * Reserved for RFC 2625 IP-over-Fibre Channel. 471 */ 472#define DLT_IP_OVER_FC 122 473 474/* 475 * Reserved for Full Frontal ATM on Solaris. 476 */ 477#define DLT_SUNATM 123 478 479/* 480 * Reserved as per request from Kent Dahlgren <kent@praesum.com> 481 * for private use. 482 */ 483#define DLT_RIO 124 /* RapidIO */ 484#define DLT_PCI_EXP 125 /* PCI Express */ 485#define DLT_AURORA 126 /* Xilinx Aurora link layer */ 486 487/* 488 * BSD header for 802.11 plus a number of bits of link-layer information 489 * including radio information. 490 */ 491#ifndef DLT_IEEE802_11_RADIO 492#define DLT_IEEE802_11_RADIO 127 493#endif 494 495/* 496 * Reserved for TZSP encapsulation. 497 */ 498#define DLT_TZSP 128 /* Tazmen Sniffer Protocol */ 499 500/* 501 * Reserved for Linux ARCNET. 502 */ 503#define DLT_ARCNET_LINUX 129 504 505/* 506 * Juniper-private data link types. 507 */ 508#define DLT_JUNIPER_MLPPP 130 509#define DLT_JUNIPER_MLFR 131 510#define DLT_JUNIPER_ES 132 511#define DLT_JUNIPER_GGSN 133 512#define DLT_JUNIPER_MFR 134 513#define DLT_JUNIPER_ATM2 135 514#define DLT_JUNIPER_SERVICES 136 515#define DLT_JUNIPER_ATM1 137 516 517/* 518 * Apple IP-over-IEEE 1394, as per a request from Dieter Siegmund 519 * <dieter@apple.com>. The header that's presented is an Ethernet-like 520 * header: 521 * 522 * #define FIREWIRE_EUI64_LEN 8 523 * struct firewire_header { 524 * u_char firewire_dhost[FIREWIRE_EUI64_LEN]; 525 * u_char firewire_shost[FIREWIRE_EUI64_LEN]; 526 * u_short firewire_type; 527 * }; 528 * 529 * with "firewire_type" being an Ethernet type value, rather than, 530 * for example, raw GASP frames being handed up. 531 */ 532#define DLT_APPLE_IP_OVER_IEEE1394 138 533 534/* 535 * Various SS7 encapsulations, as per a request from Jeff Morriss 536 * <jeff.morriss[AT]ulticom.com> and subsequent discussions. 537 */ 538#define DLT_MTP2_WITH_PHDR 139 /* pseudo-header with various info, followed by MTP2 */ 539#define DLT_MTP2 140 /* MTP2, without pseudo-header */ 540#define DLT_MTP3 141 /* MTP3, without pseudo-header or MTP2 */ 541#define DLT_SCCP 142 /* SCCP, without pseudo-header or MTP2 or MTP3 */ 542 543/* 544 * Reserved for DOCSIS. 545 */ 546#define DLT_DOCSIS 143 547 548/* 549 * Reserved for Linux IrDA. 550 */ 551#define DLT_LINUX_IRDA 144 552 553/* 554 * Reserved for IBM SP switch and IBM Next Federation switch. 555 */ 556#define DLT_IBM_SP 145 557#define DLT_IBM_SN 146 558 559/* 560 * Reserved for private use. If you have some link-layer header type 561 * that you want to use within your organization, with the capture files 562 * using that link-layer header type not ever be sent outside your 563 * organization, you can use these values. 564 * 565 * No libpcap release will use these for any purpose, nor will any 566 * tcpdump release use them, either. 567 * 568 * Do *NOT* use these in capture files that you expect anybody not using 569 * your private versions of capture-file-reading tools to read; in 570 * particular, do *NOT* use them in products, otherwise you may find that 571 * people won't be able to use tcpdump, or snort, or Ethereal, or... to 572 * read capture files from your firewall/intrusion detection/traffic 573 * monitoring/etc. appliance, or whatever product uses that DLT_ value, 574 * and you may also find that the developers of those applications will 575 * not accept patches to let them read those files. 576 * 577 * Also, do not use them if somebody might send you a capture using them 578 * for *their* private type and tools using them for *your* private type 579 * would have to read them. 580 * 581 * Instead, ask "tcpdump-workers@tcpdump.org" for a new DLT_ value, 582 * as per the comment above, and use the type you're given. 583 */ 584#define DLT_USER0 147 585#define DLT_USER1 148 586#define DLT_USER2 149 587#define DLT_USER3 150 588#define DLT_USER4 151 589#define DLT_USER5 152 590#define DLT_USER6 153 591#define DLT_USER7 154 592#define DLT_USER8 155 593#define DLT_USER9 156 594#define DLT_USER10 157 595#define DLT_USER11 158 596#define DLT_USER12 159 597#define DLT_USER13 160 598#define DLT_USER14 161 599#define DLT_USER15 162 600 601#ifdef PRIVATE 602/* 603 * For Apple private usage 604 */ 605#define DLT_PKTAP DLT_USER2 /* rdar://11779467 */ 606#endif /* PRIVATE */ 607 608/* 609 * For future use with 802.11 captures - defined by AbsoluteValue 610 * Systems to store a number of bits of link-layer information 611 * including radio information: 612 * 613 * http://www.shaftnet.org/~pizza/software/capturefrm.txt 614 * 615 * but it might be used by some non-AVS drivers now or in the 616 * future. 617 */ 618#define DLT_IEEE802_11_RADIO_AVS 163 /* 802.11 plus AVS radio header */ 619 620/* 621 * Juniper-private data link type, as per request from 622 * Hannes Gredler <hannes@juniper.net>. The DLT_s are used 623 * for passing on chassis-internal metainformation such as 624 * QOS profiles, etc.. 625 */ 626#define DLT_JUNIPER_MONITOR 164 627 628/* 629 * Reserved for BACnet MS/TP. 630 */ 631#define DLT_BACNET_MS_TP 165 632 633/* 634 * Another PPP variant as per request from Karsten Keil <kkeil@suse.de>. 635 * 636 * This is used in some OSes to allow a kernel socket filter to distinguish 637 * between incoming and outgoing packets, on a socket intended to 638 * supply pppd with outgoing packets so it can do dial-on-demand and 639 * hangup-on-lack-of-demand; incoming packets are filtered out so they 640 * don't cause pppd to hold the connection up (you don't want random 641 * input packets such as port scans, packets from old lost connections, 642 * etc. to force the connection to stay up). 643 * 644 * The first byte of the PPP header (0xff03) is modified to accomodate 645 * the direction - 0x00 = IN, 0x01 = OUT. 646 */ 647#define DLT_PPP_PPPD 166 648 649/* 650 * Names for backwards compatibility with older versions of some PPP 651 * software; new software should use DLT_PPP_PPPD. 652 */ 653#define DLT_PPP_WITH_DIRECTION DLT_PPP_PPPD 654#define DLT_LINUX_PPP_WITHDIRECTION DLT_PPP_PPPD 655 656/* 657 * Juniper-private data link type, as per request from 658 * Hannes Gredler <hannes@juniper.net>. The DLT_s are used 659 * for passing on chassis-internal metainformation such as 660 * QOS profiles, cookies, etc.. 661 */ 662#define DLT_JUNIPER_PPPOE 167 663#define DLT_JUNIPER_PPPOE_ATM 168 664 665#define DLT_GPRS_LLC 169 /* GPRS LLC */ 666#define DLT_GPF_T 170 /* GPF-T (ITU-T G.7041/Y.1303) */ 667#define DLT_GPF_F 171 /* GPF-F (ITU-T G.7041/Y.1303) */ 668 669/* 670 * Requested by Oolan Zimmer <oz@gcom.com> for use in Gcom's T1/E1 line 671 * monitoring equipment. 672 */ 673#define DLT_GCOM_T1E1 172 674#define DLT_GCOM_SERIAL 173 675 676/* 677 * Juniper-private data link type, as per request from 678 * Hannes Gredler <hannes@juniper.net>. The DLT_ is used 679 * for internal communication to Physical Interface Cards (PIC) 680 */ 681#define DLT_JUNIPER_PIC_PEER 174 682 683/* 684 * Link types requested by Gregor Maier <gregor@endace.com> of Endace 685 * Measurement Systems. They add an ERF header (see 686 * http://www.endace.com/support/EndaceRecordFormat.pdf) in front of 687 * the link-layer header. 688 */ 689#define DLT_ERF_ETH 175 /* Ethernet */ 690#define DLT_ERF_POS 176 /* Packet-over-SONET */ 691 692/* 693 * Requested by Daniele Orlandi <daniele@orlandi.com> for raw LAPD 694 * for vISDN (http://www.orlandi.com/visdn/). Its link-layer header 695 * includes additional information before the LAPD header, so it's 696 * not necessarily a generic LAPD header. 697 */ 698#define DLT_LINUX_LAPD 177 699 700/* 701 * Juniper-private data link type, as per request from 702 * Hannes Gredler <hannes@juniper.net>. 703 * The DLT_ are used for prepending meta-information 704 * like interface index, interface name 705 * before standard Ethernet, PPP, Frelay & C-HDLC Frames 706 */ 707#define DLT_JUNIPER_ETHER 178 708#define DLT_JUNIPER_PPP 179 709#define DLT_JUNIPER_FRELAY 180 710#define DLT_JUNIPER_CHDLC 181 711 712/* 713 * Multi Link Frame Relay (FRF.16) 714 */ 715#define DLT_MFR 182 716 717/* 718 * Juniper-private data link type, as per request from 719 * Hannes Gredler <hannes@juniper.net>. 720 * The DLT_ is used for internal communication with a 721 * voice Adapter Card (PIC) 722 */ 723#define DLT_JUNIPER_VP 183 724 725/* 726 * Arinc 429 frames. 727 * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>. 728 * Every frame contains a 32bit A429 label. 729 * More documentation on Arinc 429 can be found at 730 * http://www.condoreng.com/support/downloads/tutorials/ARINCTutorial.pdf 731 */ 732#define DLT_A429 184 733 734/* 735 * Arinc 653 Interpartition Communication messages. 736 * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>. 737 * Please refer to the A653-1 standard for more information. 738 */ 739#define DLT_A653_ICM 185 740 741/* 742 * USB packets, beginning with a USB setup header; requested by 743 * Paolo Abeni <paolo.abeni@email.it>. 744 */ 745#define DLT_USB 186 746 747/* 748 * Bluetooth HCI UART transport layer (part H:4); requested by 749 * Paolo Abeni. 750 */ 751#define DLT_BLUETOOTH_HCI_H4 187 752 753/* 754 * IEEE 802.16 MAC Common Part Sublayer; requested by Maria Cruz 755 * <cruz_petagay@bah.com>. 756 */ 757#define DLT_IEEE802_16_MAC_CPS 188 758 759/* 760 * USB packets, beginning with a Linux USB header; requested by 761 * Paolo Abeni <paolo.abeni@email.it>. 762 */ 763#define DLT_USB_LINUX 189 764 765/* 766 * Controller Area Network (CAN) v. 2.0B packets. 767 * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>. 768 * Used to dump CAN packets coming from a CAN Vector board. 769 * More documentation on the CAN v2.0B frames can be found at 770 * http://www.can-cia.org/downloads/?269 771 */ 772#define DLT_CAN20B 190 773 774/* 775 * IEEE 802.15.4, with address fields padded, as is done by Linux 776 * drivers; requested by Juergen Schimmer. 777 */ 778#define DLT_IEEE802_15_4_LINUX 191 779 780/* 781 * Per Packet Information encapsulated packets. 782 * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>. 783 */ 784#define DLT_PPI 192 785 786/* 787 * Header for 802.16 MAC Common Part Sublayer plus a radiotap radio header; 788 * requested by Charles Clancy. 789 */ 790#define DLT_IEEE802_16_MAC_CPS_RADIO 193 791 792/* 793 * Juniper-private data link type, as per request from 794 * Hannes Gredler <hannes@juniper.net>. 795 * The DLT_ is used for internal communication with a 796 * integrated service module (ISM). 797 */ 798#define DLT_JUNIPER_ISM 194 799 800/* 801 * IEEE 802.15.4, exactly as it appears in the spec (no padding, no 802 * nothing); requested by Mikko Saarnivala <mikko.saarnivala@sensinode.com>. 803 */ 804#define DLT_IEEE802_15_4 195 805 806/* 807 * Various link-layer types, with a pseudo-header, for SITA 808 * (http://www.sita.aero/); requested by Fulko Hew (fulko.hew@gmail.com). 809 */ 810#define DLT_SITA 196 811 812/* 813 * Various link-layer types, with a pseudo-header, for Endace DAG cards; 814 * encapsulates Endace ERF records. Requested by Stephen Donnelly 815 * <stephen@endace.com>. 816 */ 817#define DLT_ERF 197 818 819/* 820 * Special header prepended to Ethernet packets when capturing from a 821 * u10 Networks board. Requested by Phil Mulholland 822 * <phil@u10networks.com>. 823 */ 824#define DLT_RAIF1 198 825 826/* 827 * IPMB packet for IPMI, beginning with the I2C slave address, followed 828 * by the netFn and LUN, etc.. Requested by Chanthy Toeung 829 * <chanthy.toeung@ca.kontron.com>. 830 */ 831#define DLT_IPMB 199 832 833/* 834 * Juniper-private data link type, as per request from 835 * Hannes Gredler <hannes@juniper.net>. 836 * The DLT_ is used for capturing data on a secure tunnel interface. 837 */ 838#define DLT_JUNIPER_ST 200 839 840/* 841 * Bluetooth HCI UART transport layer (part H:4), with pseudo-header 842 * that includes direction information; requested by Paolo Abeni. 843 */ 844#define DLT_BLUETOOTH_HCI_H4_WITH_PHDR 201 845 846/* 847 * AX.25 packet with a 1-byte KISS header; see 848 * 849 * http://www.ax25.net/kiss.htm 850 * 851 * as per Richard Stearn <richard@rns-stearn.demon.co.uk>. 852 */ 853#define DLT_AX25_KISS 202 854 855/* 856 * LAPD packets from an ISDN channel, starting with the address field, 857 * with no pseudo-header. 858 * Requested by Varuna De Silva <varunax@gmail.com>. 859 */ 860#define DLT_LAPD 203 861 862/* 863 * Variants of various link-layer headers, with a one-byte direction 864 * pseudo-header prepended - zero means "received by this host", 865 * non-zero (any non-zero value) means "sent by this host" - as per 866 * Will Barker <w.barker@zen.co.uk>. 867 */ 868#define DLT_PPP_WITH_DIR 204 /* PPP - don't confuse with DLT_PPP_WITH_DIRECTION */ 869#define DLT_C_HDLC_WITH_DIR 205 /* Cisco HDLC */ 870#define DLT_FRELAY_WITH_DIR 206 /* Frame Relay */ 871#define DLT_LAPB_WITH_DIR 207 /* LAPB */ 872 873/* 874 * 208 is reserved for an as-yet-unspecified proprietary link-layer 875 * type, as requested by Will Barker. 876 */ 877 878/* 879 * IPMB with a Linux-specific pseudo-header; as requested by Alexey Neyman 880 * <avn@pigeonpoint.com>. 881 */ 882#define DLT_IPMB_LINUX 209 883 884/* 885 * FlexRay automotive bus - http://www.flexray.com/ - as requested 886 * by Hannes Kaelber <hannes.kaelber@x2e.de>. 887 */ 888#define DLT_FLEXRAY 210 889 890/* 891 * Media Oriented Systems Transport (MOST) bus for multimedia 892 * transport - http://www.mostcooperation.com/ - as requested 893 * by Hannes Kaelber <hannes.kaelber@x2e.de>. 894 */ 895#define DLT_MOST 211 896 897/* 898 * Local Interconnect Network (LIN) bus for vehicle networks - 899 * http://www.lin-subbus.org/ - as requested by Hannes Kaelber 900 * <hannes.kaelber@x2e.de>. 901 */ 902#define DLT_LIN 212 903 904/* 905 * X2E-private data link type used for serial line capture, 906 * as requested by Hannes Kaelber <hannes.kaelber@x2e.de>. 907 */ 908#define DLT_X2E_SERIAL 213 909 910/* 911 * X2E-private data link type used for the Xoraya data logger 912 * family, as requested by Hannes Kaelber <hannes.kaelber@x2e.de>. 913 */ 914#define DLT_X2E_XORAYA 214 915 916/* 917 * IEEE 802.15.4, exactly as it appears in the spec (no padding, no 918 * nothing), but with the PHY-level data for non-ASK PHYs (4 octets 919 * of 0 as preamble, one octet of SFD, one octet of frame length+ 920 * reserved bit, and then the MAC-layer data, starting with the 921 * frame control field). 922 * 923 * Requested by Max Filippov <jcmvbkbc@gmail.com>. 924 */ 925#define DLT_IEEE802_15_4_NONASK_PHY 215 926 927/* 928 * David Gibson <david@gibson.dropbear.id.au> requested this for 929 * captures from the Linux kernel /dev/input/eventN devices. This 930 * is used to communicate keystrokes and mouse movements from the 931 * Linux kernel to display systems, such as Xorg. 932 */ 933#define DLT_LINUX_EVDEV 216 934 935/* 936 * GSM Um and Abis interfaces, preceded by a "gsmtap" header. 937 * 938 * Requested by Harald Welte <laforge@gnumonks.org>. 939 */ 940#define DLT_GSMTAP_UM 217 941#define DLT_GSMTAP_ABIS 218 942 943/* 944 * MPLS, with an MPLS label as the link-layer header. 945 * Requested by Michele Marchetto <michele@openbsd.org> on behalf 946 * of OpenBSD. 947 */ 948#define DLT_MPLS 219 949 950/* 951 * USB packets, beginning with a Linux USB header, with the USB header 952 * padded to 64 bytes; required for memory-mapped access. 953 */ 954#define DLT_USB_LINUX_MMAPPED 220 955 956/* 957 * DECT packets, with a pseudo-header; requested by 958 * Matthias Wenzel <tcpdump@mazzoo.de>. 959 */ 960#define DLT_DECT 221 961 962/* 963 * From: "Lidwa, Eric (GSFC-582.0)[SGT INC]" <eric.lidwa-1@nasa.gov> 964 * Date: Mon, 11 May 2009 11:18:30 -0500 965 * 966 * DLT_AOS. We need it for AOS Space Data Link Protocol. 967 * I have already written dissectors for but need an OK from 968 * legal before I can submit a patch. 969 * 970 */ 971#define DLT_AOS 222 972 973/* 974 * Wireless HART (Highway Addressable Remote Transducer) 975 * From the HART Communication Foundation 976 * IES/PAS 62591 977 * 978 * Requested by Sam Roberts <vieuxtech@gmail.com>. 979 */ 980#define DLT_WIHART 223 981 982/* 983 * Fibre Channel FC-2 frames, beginning with a Frame_Header. 984 * Requested by Kahou Lei <kahou82@gmail.com>. 985 */ 986#define DLT_FC_2 224 987 988/* 989 * Fibre Channel FC-2 frames, beginning with an encoding of the 990 * SOF, and ending with an encoding of the EOF. 991 * 992 * The encodings represent the frame delimiters as 4-byte sequences 993 * representing the corresponding ordered sets, with K28.5 994 * represented as 0xBC, and the D symbols as the corresponding 995 * byte values; for example, SOFi2, which is K28.5 - D21.5 - D1.2 - D21.2, 996 * is represented as 0xBC 0xB5 0x55 0x55. 997 * 998 * Requested by Kahou Lei <kahou82@gmail.com>. 999 */ 1000#define DLT_FC_2_WITH_FRAME_DELIMS 225 1001 1002/* 1003 * Solaris ipnet pseudo-header; requested by Darren Reed <Darren.Reed@Sun.COM>. 1004 * 1005 * The pseudo-header starts with a one-byte version number; for version 2, 1006 * the pseudo-header is: 1007 * 1008 * struct dl_ipnetinfo { 1009 * u_int8_t dli_version; 1010 * u_int8_t dli_family; 1011 * u_int16_t dli_htype; 1012 * u_int32_t dli_pktlen; 1013 * u_int32_t dli_ifindex; 1014 * u_int32_t dli_grifindex; 1015 * u_int32_t dli_zsrc; 1016 * u_int32_t dli_zdst; 1017 * }; 1018 * 1019 * dli_version is 2 for the current version of the pseudo-header. 1020 * 1021 * dli_family is a Solaris address family value, so it's 2 for IPv4 1022 * and 26 for IPv6. 1023 * 1024 * dli_htype is a "hook type" - 0 for incoming packets, 1 for outgoing 1025 * packets, and 2 for packets arriving from another zone on the same 1026 * machine. 1027 * 1028 * dli_pktlen is the length of the packet data following the pseudo-header 1029 * (so the captured length minus dli_pktlen is the length of the 1030 * pseudo-header, assuming the entire pseudo-header was captured). 1031 * 1032 * dli_ifindex is the interface index of the interface on which the 1033 * packet arrived. 1034 * 1035 * dli_grifindex is the group interface index number (for IPMP interfaces). 1036 * 1037 * dli_zsrc is the zone identifier for the source of the packet. 1038 * 1039 * dli_zdst is the zone identifier for the destination of the packet. 1040 * 1041 * A zone number of 0 is the global zone; a zone number of 0xffffffff 1042 * means that the packet arrived from another host on the network, not 1043 * from another zone on the same machine. 1044 * 1045 * An IPv4 or IPv6 datagram follows the pseudo-header; dli_family indicates 1046 * which of those it is. 1047 */ 1048#define DLT_IPNET 226 1049 1050/* 1051 * CAN (Controller Area Network) frames, with a pseudo-header as supplied 1052 * by Linux SocketCAN. See Documentation/networking/can.txt in the Linux 1053 * source. 1054 * 1055 * Requested by Felix Obenhuber <felix@obenhuber.de>. 1056 */ 1057#define DLT_CAN_SOCKETCAN 227 1058 1059/* 1060 * Raw IPv4/IPv6; different from DLT_RAW in that the DLT_ value specifies 1061 * whether it's v4 or v6. Requested by Darren Reed <Darren.Reed@Sun.COM>. 1062 */ 1063#define DLT_IPV4 228 1064#define DLT_IPV6 229 1065 1066/* 1067 * IEEE 802.15.4, exactly as it appears in the spec (no padding, no 1068 * nothing), and with no FCS at the end of the frame; requested by 1069 * Jon Smirl <jonsmirl@gmail.com>. 1070 */ 1071#define DLT_IEEE802_15_4_NOFCS 230 1072 1073/* 1074 * Raw D-Bus: 1075 * 1076 * http://www.freedesktop.org/wiki/Software/dbus 1077 * 1078 * messages: 1079 * 1080 * http://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-messages 1081 * 1082 * starting with the endianness flag, followed by the message type, etc., 1083 * but without the authentication handshake before the message sequence: 1084 * 1085 * http://dbus.freedesktop.org/doc/dbus-specification.html#auth-protocol 1086 * 1087 * Requested by Martin Vidner <martin@vidner.net>. 1088 */ 1089#define DLT_DBUS 231 1090 1091/* 1092 * Juniper-private data link type, as per request from 1093 * Hannes Gredler <hannes@juniper.net>. 1094 */ 1095#define DLT_JUNIPER_VS 232 1096#define DLT_JUNIPER_SRX_E2E 233 1097#define DLT_JUNIPER_FIBRECHANNEL 234 1098 1099/* 1100 * DVB-CI (DVB Common Interface for communication between a PC Card 1101 * module and a DVB receiver). See 1102 * 1103 * http://www.kaiser.cx/pcap-dvbci.html 1104 * 1105 * for the specification. 1106 * 1107 * Requested by Martin Kaiser <martin@kaiser.cx>. 1108 */ 1109#define DLT_DVB_CI 235 1110 1111/* 1112 * Variant of 3GPP TS 27.010 multiplexing protocol (similar to, but 1113 * *not* the same as, 27.010). Requested by Hans-Christoph Schemmel 1114 * <hans-christoph.schemmel@cinterion.com>. 1115 */ 1116#define DLT_MUX27010 236 1117 1118/* 1119 * STANAG 5066 D_PDUs. Requested by M. Baris Demiray 1120 * <barisdemiray@gmail.com>. 1121 */ 1122#define DLT_STANAG_5066_D_PDU 237 1123 1124/* 1125 * Juniper-private data link type, as per request from 1126 * Hannes Gredler <hannes@juniper.net>. 1127 */ 1128#define DLT_JUNIPER_ATM_CEMIC 238 1129 1130/* 1131 * NetFilter LOG messages 1132 * (payload of netlink NFNL_SUBSYS_ULOG/NFULNL_MSG_PACKET packets) 1133 * 1134 * Requested by Jakub Zawadzki <darkjames-ws@darkjames.pl> 1135 */ 1136#define DLT_NFLOG 239 1137 1138/* 1139 * Hilscher Gesellschaft fuer Systemautomation mbH link-layer type 1140 * for Ethernet packets with a 4-byte pseudo-header and always 1141 * with the payload including the FCS, as supplied by their 1142 * netANALYZER hardware and software. 1143 * 1144 * Requested by Holger P. Frommer <HPfrommer@hilscher.com> 1145 */ 1146#define DLT_NETANALYZER 240 1147 1148/* 1149 * Hilscher Gesellschaft fuer Systemautomation mbH link-layer type 1150 * for Ethernet packets with a 4-byte pseudo-header and FCS and 1151 * with the Ethernet header preceded by 7 bytes of preamble and 1152 * 1 byte of SFD, as supplied by their netANALYZER hardware and 1153 * software. 1154 * 1155 * Requested by Holger P. Frommer <HPfrommer@hilscher.com> 1156 */ 1157#define DLT_NETANALYZER_TRANSPARENT 241 1158 1159/* 1160 * IP-over-Infiniband, as specified by RFC 4391. 1161 * 1162 * Requested by Petr Sumbera <petr.sumbera@oracle.com>. 1163 */ 1164#define DLT_IPOIB 242 1165 1166/* 1167 * MPEG-2 transport stream (ISO 13818-1/ITU-T H.222.0). 1168 * 1169 * Requested by Guy Martin <gmsoft@tuxicoman.be>. 1170 */ 1171#define DLT_MPEG_2_TS 243 1172 1173/* 1174 * ng4T GmbH's UMTS Iub/Iur-over-ATM and Iub/Iur-over-IP format as 1175 * used by their ng40 protocol tester. 1176 * 1177 * Requested by Jens Grimmer <jens.grimmer@ng4t.com>. 1178 */ 1179#define DLT_NG40 244 1180 1181/* 1182 * Pseudo-header giving adapter number and flags, followed by an NFC 1183 * (Near-Field Communications) Logical Link Control Protocol (LLCP) PDU, 1184 * as specified by NFC Forum Logical Link Control Protocol Technical 1185 * Specification LLCP 1.1. 1186 * 1187 * Requested by Mike Wakerly <mikey@google.com>. 1188 */ 1189#define DLT_NFC_LLCP 245 1190 1191 1192#define DLT_MATCHING_MAX 245 /* highest value in the "matching" range */ 1193 1194/* 1195 * The instruction encodings. 1196 */ 1197/* instruction classes */ 1198#define BPF_CLASS(code) ((code) & 0x07) 1199#define BPF_LD 0x00 1200#define BPF_LDX 0x01 1201#define BPF_ST 0x02 1202#define BPF_STX 0x03 1203#define BPF_ALU 0x04 1204#define BPF_JMP 0x05 1205#define BPF_RET 0x06 1206#define BPF_MISC 0x07 1207 1208/* ld/ldx fields */ 1209#define BPF_SIZE(code) ((code) & 0x18) 1210#define BPF_W 0x00 1211#define BPF_H 0x08 1212#define BPF_B 0x10 1213#define BPF_MODE(code) ((code) & 0xe0) 1214#define BPF_IMM 0x00 1215#define BPF_ABS 0x20 1216#define BPF_IND 0x40 1217#define BPF_MEM 0x60 1218#define BPF_LEN 0x80 1219#define BPF_MSH 0xa0 1220 1221/* alu/jmp fields */ 1222#define BPF_OP(code) ((code) & 0xf0) 1223#define BPF_ADD 0x00 1224#define BPF_SUB 0x10 1225#define BPF_MUL 0x20 1226#define BPF_DIV 0x30 1227#define BPF_OR 0x40 1228#define BPF_AND 0x50 1229#define BPF_LSH 0x60 1230#define BPF_RSH 0x70 1231#define BPF_NEG 0x80 1232#define BPF_JA 0x00 1233#define BPF_JEQ 0x10 1234#define BPF_JGT 0x20 1235#define BPF_JGE 0x30 1236#define BPF_JSET 0x40 1237#define BPF_SRC(code) ((code) & 0x08) 1238#define BPF_K 0x00 1239#define BPF_X 0x08 1240 1241/* ret - BPF_K and BPF_X also apply */ 1242#define BPF_RVAL(code) ((code) & 0x18) 1243#define BPF_A 0x10 1244 1245/* misc */ 1246#define BPF_MISCOP(code) ((code) & 0xf8) 1247#define BPF_TAX 0x00 1248#define BPF_TXA 0x80 1249 1250/* 1251 * The instruction data structure. 1252 */ 1253struct bpf_insn { 1254 u_short code; 1255 u_char jt; 1256 u_char jf; 1257 bpf_u_int32 k; 1258}; 1259 1260/* 1261 * Macros for insn array initializers. 1262 */ 1263#define BPF_STMT(code, k) { (u_short)(code), 0, 0, k } 1264#define BPF_JUMP(code, k, jt, jf) { (u_short)(code), jt, jf, k } 1265 1266#pragma pack(4) 1267 1268/* 1269 * Structure to retrieve available DLTs for the interface. 1270 */ 1271struct bpf_dltlist { 1272 u_int32_t bfl_len; /* number of bfd_list array */ 1273 union { 1274 u_int32_t *bflu_list; /* array of DLTs */ 1275 u_int64_t bflu_pad; 1276 } bfl_u; 1277}; 1278#define bfl_list bfl_u.bflu_list 1279 1280#pragma pack() 1281 1282#ifdef KERNEL_PRIVATE 1283/* Forward declerations */ 1284struct ifnet; 1285struct mbuf; 1286 1287extern int bpf_validate(const struct bpf_insn *, int); 1288extern void bpfdetach(struct ifnet *); 1289extern void bpfilterattach(int); 1290extern u_int bpf_filter(const struct bpf_insn *, u_char *, u_int, u_int); 1291#endif /* KERNEL_PRIVATE */ 1292 1293#ifdef KERNEL 1294#ifndef BPF_TAP_MODE_T 1295#define BPF_TAP_MODE_T 1296/*! 1297 @enum BPF tap mode 1298 @abstract Constants defining interface families. 1299 @constant BPF_MODE_DISABLED Disable bpf. 1300 @constant BPF_MODE_INPUT Enable input only. 1301 @constant BPF_MODE_OUTPUT Enable output only. 1302 @constant BPF_MODE_INPUT_OUTPUT Enable input and output. 1303*/ 1304 1305enum { 1306 BPF_MODE_DISABLED = 0, 1307 BPF_MODE_INPUT = 1, 1308 BPF_MODE_OUTPUT = 2, 1309 BPF_MODE_INPUT_OUTPUT = 3 1310}; 1311/*! 1312 @typedef bpf_tap_mode 1313 @abstract Mode for tapping. BPF_MODE_DISABLED/BPF_MODE_INPUT_OUTPUT etc. 1314*/ 1315typedef u_int32_t bpf_tap_mode; 1316#endif /* !BPF_TAP_MODE_T */ 1317 1318/*! 1319 @typedef bpf_send_func 1320 @discussion bpf_send_func is called when a bpf file descriptor is 1321 used to send a raw packet on the interface. The mbuf and data 1322 link type are specified. The callback is responsible for 1323 releasing the mbuf whether or not it returns an error. 1324 @param interface The interface the packet is being sent on. 1325 @param dlt The data link type the bpf device is attached to. 1326 @param packet The packet to be sent. 1327 */ 1328typedef errno_t (*bpf_send_func)(ifnet_t interface, u_int32_t data_link_type, 1329 mbuf_t packet); 1330 1331/*! 1332 @typedef bpf_tap_func 1333 @discussion bpf_tap_func is called when the tap state of the 1334 interface changes. This happens when a bpf device attaches to an 1335 interface or detaches from an interface. The tap mode will join 1336 together (bit or) the modes of all bpf devices using that 1337 interface for that dlt. If you return an error from this 1338 function, the bpf device attach attempt that triggered the tap 1339 will fail. If this function was called bacuse the tap state was 1340 decreasing (tap in or out is stopping), the error will be 1341 ignored. 1342 @param interface The interface being tapped. 1343 @param dlt The data link type being tapped. 1344 @param direction The direction of the tap. 1345 */ 1346typedef errno_t (*bpf_tap_func)(ifnet_t interface, u_int32_t data_link_type, 1347 bpf_tap_mode direction); 1348 1349/*! 1350 @function bpfattach 1351 @discussion Registers an interface with BPF. This allows bpf devices 1352 to attach to your interface to capture packets. Your interface 1353 will be unregistered automatically when your interface is 1354 detached. 1355 @param interface The interface to register with BPF. 1356 @param data_link_type The data link type of the interface. See the 1357 DLT_* defines in bpf.h. 1358 @param header_length The length, in bytes, of the data link header. 1359 */ 1360extern void bpfattach(ifnet_t interface, u_int data_link_type, 1361 u_int header_length); 1362 1363/*! 1364 @function bpf_attach 1365 @discussion Registers an interface with BPF. This allows bpf devices 1366 to attach to your interface to capture and transmit packets. 1367 Your interface will be unregistered automatically when your 1368 interface is detached. You may register multiple times with 1369 different data link types. An 802.11 interface would use this to 1370 allow clients to pick whether they want just an ethernet style 1371 frame or the 802.11 wireless headers as well. The first dlt you 1372 register will be considered the default. Any bpf device attaches 1373 that do not specify a data link type will use the default. 1374 @param interface The interface to register with BPF. 1375 @param data_link_type The data link type of the interface. See the 1376 DLT_* defines in bpf.h. 1377 @param header_length The length, in bytes, of the data link header. 1378 @param send See the bpf_send_func described above. 1379 @param tap See the bpf_tap_func described above. 1380 */ 1381extern errno_t bpf_attach(ifnet_t interface, u_int32_t data_link_type, 1382 u_int32_t header_length, bpf_send_func send, bpf_tap_func tap); 1383 1384/*! 1385 @function bpf_tap_in 1386 @discussion Call this function when your interface receives a 1387 packet. This function will check if any bpf devices need a 1388 a copy of the packet. 1389 @param interface The interface the packet was received on. 1390 @param dlt The data link type of the packet. 1391 @param packet The packet received. 1392 @param header An optional pointer to a header that will be prepended. 1393 @param headerlen If the header was specified, the length of the header. 1394 */ 1395extern void bpf_tap_in(ifnet_t interface, u_int32_t dlt, mbuf_t packet, 1396 void *header, size_t header_len); 1397 1398/*! 1399 @function bpf_tap_out 1400 @discussion Call this function when your interface trasmits a 1401 packet. This function will check if any bpf devices need a 1402 a copy of the packet. 1403 @param interface The interface the packet was or will be transmitted on. 1404 @param dlt The data link type of the packet. 1405 @param packet The packet received. 1406 @param header An optional pointer to a header that will be prepended. 1407 @param headerlen If the header was specified, the length of the header. 1408 */ 1409extern void bpf_tap_out(ifnet_t interface, u_int32_t dlt, mbuf_t packet, 1410 void *header, size_t header_len); 1411 1412#endif /* KERNEL */ 1413 1414/* 1415 * Number of scratch memory words (for BPF_LD|BPF_MEM and BPF_ST). 1416 */ 1417#define BPF_MEMWORDS 16 1418 1419#endif /* _NET_BPF_H_ */ 1420